FLUID SUPPLY SYSTEM WITH TEMPERATURE CONTROL FOR FLUID CONSERVATION

Abstract

A fluid supply system provides fluid temperature control, and includes first and second main fluid supply lines adapted to receive a fluid and provide the fluid to a dispensing location, first and second thermal rejection fluid lines, and a valve system connected to a control system to control and direct the fluid flow to maintain or adjust the fluid temperature for fluid conservation. Temperature sensors detect the temperatures of the fluid near the dispensing location and the temperature of fluid flowing in the first or second main fluid lines and sends the detected temperatures to the control system which compares the detected temperature for the fluid near the dispensing location with a desired temperature or temperature range and, if the fluid temperature does not match the desired temperature or range, the control system controls the valve system directing the fluid back to be warmed or cooled to the desired temperature.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a fluid supply system, such as a water supply system. More particularly, the present invention relates to a water supply system having temperature control for water conservation.

2. Description of the Related Art

A significant amount of water is typically wasted at residential buildings and other locations often because the water dispensed is not at a suitable temperature. A common practice when the water dispensed is not at a suitable temperature is to run the water down the drain till it is at the desired temperature. In winter, for example, when warm water is desired, the water between the consumption point, such as a sink or shower, and the water heater is usually relatively cold, such as a result of heat loss from water in the water lines or from a lack of insulation. Also, for example, if the water received is relatively warm, a similar practice of running the water until cooled to a desired temperature is typically done, such as in the summer, especially if the pipes are exposed to direct sunlight, as can be typical in the Middle East and the Gulf Region, for example. In both situations where the water is either too hot or too cold, the water is clean but is wasted when allowed to run down the drain because it does not have an acceptable temperature.

Various approaches at saving water and having water at a desired temperature are typically either relatively costly or relatively ineffective. For example, in winter, a small local heater can be positioned in the bathroom for heating water till hot water from a central water heater arrives at a desired temperature. However, use of a local heater typically is not suitable where the water arrives at a temperature warmer than a desired temperature, such as in the summer.

Also, water supply systems are designed to deliver water from a source, such as a tank to a desired dispensing location. During this process, as the water is delivered, but before the water is actually used, the water system operator or water system user can test the water temperature, to ensure that the water temperature meets the desired temperature profile. As the water is being tested, it typically is also wasted, as it freely exits the system. In the regions of the world, where water is in short supply, water conservation is often an important consideration to support continued habitation. Accordingly, testing procedures that are used to test the water temperature, but also enable water waste, are undesirable, particularly from a water conservation standpoint.

Accordingly, a fluid supply system, such as a water supply system, with temperature control for fluid conservation addressing the aforementioned problems regarding fluid conservation, such as water conservation, is desired.

SUMMARY OF THE INVENTION

Embodiments of a fluid supply system, such as a water supply system, provide for a fluid supply system with temperature control for fluid conservation. Embodiments of the fluid supply system enhance fluid conservation by sampling the fluid temperature, such as water, before it exits the fluid supply system. If the fluid, such as water, does not meet the desired temperature, the fluid supply system recirculates the fluid through the fluid supply system, until the fluid temperature reaches the desired temperature. Accordingly, embodiments of the fluid supply system can enable the fluid to reach a desired temperature, such as a relatively warmer or a relatively colder temperature, before the fluid exits the fluid supply system, to enhance fluid conservation and, therefore can enhance water saving and can benefit various regions of the world, such as where water conservation can be critical to habitation.

Embodiments of the fluid supply system with temperature control for fluid conservation include a first main fluid line and a second main fluid line, the first and second main fluid lines to receive therein a fluid, such as water, one or more thermal rejection fluid lines and a valve system to selectively control flow of fluid in the fluid supply system, such as can include a plurality of control valves, such as solenoid valves, in communication with or connected to a control system. The control system includes a controller and is associated with one or more temperature sensors to detect the temperature of the fluid in the first and second main fluid lines and at least one dispensing temperature sensor associated with a corresponding dispensing location of the fluid to detect a corresponding dispensing location temperature of the fluid proximate to the corresponding dispensing location.

The one or more temperature sensors detect the temperature of the fluid at least at one predetermined location in the corresponding first or second main fluid lines and the at least one dispensing temperature sensor detects a corresponding dispensing location temperature of the fluid at the location associated with the corresponding dispensing location and the temperature sensors send the controller corresponding temperatures. The one or more temperatures are compared to a preselected or preprogrammed temperature or temperature range, such as a desired temperature or a desired temperature range, as can correspond to or be based on the detected temperature of the fluid at one or more predetermined locations in the corresponding first or second main fluid lines. If the fluid temperature does not meet the criteria of the preprogrammed or desired temperature or temperature range, the controller sends a signal to the valve system to control the valve system to direct the fluid to a thermal rejection fluid line and back along the other of the first or second main fluid line. As such, the fluid is then circulated through the other of the first or second main fluid line to respectively warm, or heat, or cool the fluid to substantially the preselected or preprogrammed desired temperature or to be in a desired temperature range. The first main fluid line can include a heater to warm, or heat, the fluid in the first main fluid line.

Also, embodiments include a fluid supply system to control a fluid temperature for fluid conservation including a first main fluid line, a second main fluid line and at least one of a heater or a cooler, or a combination thereof, positioned along the first main fluid line. The fluid supply system includes a common thermal rejection return fluid line in communication with the first and second main fluid lines to selectively recirculate the fluid back through the second main fluid line when the fluid supply system operates in other than a normal mode. The fluid supply system further includes at least one temperature sensor associated with at least one of the first main fluid line or the second main fluid line to detect a temperature of the fluid flowing therethrough, and includes at least one dispensing temperature sensor to detect a corresponding dispensing location temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line proximate to the corresponding dispensing location, a valve system to selectively control flow of fluid in the fluid supply system, and also includes a control system including a controller.

The control system including the controller selectively controls the valve system, as can include a plurality of valves, to selectively direct the flow of the fluid through the first and second main fluid lines to a dispensing location in a normal mode or to selectively direct the flow of the fluid to recirculate the fluid back through the common thermal rejection return fluid line, the second main fluid line and a second thermal rejection fluid line back to a fluid source in other than a normal mode and, in other than a normal mode, to recirculate the fluid from the fluid source back through the first main fluid line and through the heater or cooler to respectively warm, or heat, or cool the recirculated fluid from the fluid source until the detected dispensing location temperature is substantially at the preselected desired temperature or substantially falls in the preselected desired temperature range.

Further, embodiments of a fluid supply system to control a fluid temperature for fluid conservation include a first main fluid line and a second main fluid line, a heater or cooler, or a combination thereof, positioned along the first main fluid line, a first common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line, a second thermal rejection fluid line in communication with the second main fluid line, and a second common thermal rejection return fluid line in communication with the second thermal rejection line and the first main fluid line to recirculate fluid back through the first main fluid line when the fluid supply system operates in other than a normal mode. The fluid supply system also includes at least one temperature sensor associated with at least one of the first main fluid line or the second main fluid line to detect a temperature of the fluid flowing therethrough, at least one dispensing temperature sensor associated with a corresponding dispensing location to detect a corresponding dispensing location temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line proximate to the corresponding dispensing location, a valve system to selectively control flow of fluid in the fluid supply system, and a control system including a controller.

The control system including the controller controls the valve system, as can include a plurality of valves, to selectively direct the flow of the fluid through a fluid source line from a fluid source and through the first and second main fluid lines to a dispensing location in a normal mode or, in other than a normal mode, to selectively direct the flow of the fluid to recirculate the fluid back through the first common thermal rejection return fluid line, the second main fluid line, through the second thermal rejection fluid line, through second common thermal rejection return fluid line and back through the first main fluid line through the heater or cooler to respectively warm, or heat, or cool the recirculated fluid until the detected dispensing location temperature is substantially at the preselected desired temperature or substantially falls in the preselected desired temperature range based upon the detected temperature.

These and other features of the present invention will become readily apparent upon further review of the following specification and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a diagrammatic view of an embodiment of a fluid supply system with temperature control for fluid conservation, operating in a normal fluid flow mode, according to the present invention.

FIG. 1B is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 1A, in a fluid warming or heating mode, according to the present invention.

FIG. 1C is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 1A, in a fluid cooling mode, according to the present invention.

FIG. 2 is an block diagram illustrating a general control system used for controlling fluid flow through a fluid supply system in embodiments of a fluid supply system with temperature control for fluid conservation.

FIG. 3 is a diagrammatic view of an embodiment of a dispensing location having plural fluid dispensers to dispense a fluid at multiple temperatures that receives a fluid from a fluid supply system in embodiments of a fluid supply system with temperature control for fluid conservation, according to the present invention.

FIG. 4 is a diagrammatic view of an embodiment of the dispensing location having a recirculation pump to facilitate fluid flow through a thermal rejection line that receives a fluid from a fluid supply system in embodiments of a fluid supply system with temperature control for fluid conservation, according to the present invention.

FIG. 5A is a diagrammatic view of another embodiment of a fluid supply system with temperature control for fluid conservation, illustrating an embodiment using a valve system, in a normal fluid flow mode, according to the present invention.

FIG. 5B is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 5A, in a fluid warming or heating mode, according to the present invention.

FIG. 5C is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 5A in a fluid cooling mode, according to the present invention.

FIG. 6A is a diagrammatic view of another embodiment of a fluid supply system with temperature control for fluid conservation, illustrating an embodiment using a tank-less fluid source, in a normal fluid flow mode, according to the present invention.

FIG. 6B is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 6A, selectively in a fluid warming or heating mode when the fluid is warmed, or heated, or in a fluid cooling mode when the fluid is cooled, according to the present invention.

FIG. 7A is a diagrammatic view of another embodiment of a fluid supply system with temperature control for fluid conservation, illustrating an embodiment with a tank-less fluid source, in a normal fluid flow mode, according to the present invention.

FIG. 7B is a diagrammatic view of the embodiment of a fluid supply system with temperature control for fluid conservation of FIG. 7A, selectively in a fluid warming or heating mode when the fluid is warmed, or heated, or in a fluid cooling mode when the fluid is cooled, according to the present invention.

Unless otherwise indicated, similar reference characters denote corresponding features consistently throughout the attached drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 1A, embodiments of a fluid supply system, such as a fluid supply system 10, with temperature control for fluid conservation, such as for water conservation, can enable an operator or user of the fluid supply system 10 to supply a fluid, such as water, to a desired location, at a preselected temperature, while also assisting in reducing the likelihood of fluid in the fluid supply system 10 from being wasted. While the fluid supply system 10 is particularly applicable as a water supply system for water conservation, the fluid supply system 10 can also be used for conservation of other fluids, such as other aqueous fluids, for example, and should not be construed in a limiting sense. Continuing with reference to FIGS. 1A-1C, there is shown an embodiment of the fluid supply system 10. The fluid supply system 10 can control and monitor the temperature of the fluid in the fluid supply system 10 to enhance fluid conservation, by delivering the fluid to a dispensing location 12 that meets a preselected temperature profile, and can recirculate fluid before or from the dispensing location 12 and back through the fluid supply system 10, that does not meet the preselected temperature profile.

The fluid supply system 10 generally is adapted to receive fluid from a fluid source, such as a tank 14. The fluid supply system 10 can also include a pump 16, such as a fluid pump, a heater 18, or a heating element, to warm, or heat, the fluid, a fluid source line 20 for delivering fluid from the fluid source, such as the tank 14, a first main fluid line 21 for delivering fluid from the fluid source line 20 at a first temperature or within a first temperature range, a second main fluid line 22 for also delivering fluid from the fluid source line 20, such as the tank 14, at a second temperature or within a second temperature range. The fluid supply system 10 can also include a first thermal rejection fluid line 24, a second thermal rejection fluid line 26, a central thermal rejection return fluid line 25 as a fluid return line, such as to return fluid to the fluid source, and in communication with the first thermal rejection fluid line 24 and the second thermal rejection fluid line 26, and also includes a common thermal rejection return fluid line 27. As shown, the first main fluid line 21 further includes an intermediate fluid line 17 provided between the pump 16 and the heater 18, and a portion as a “hot” first fluid main line 21 which can deliver warmed, or heated, fluid from the heater 18 to the dispensing location 12.

The fluid supply system 10 can also include a series of control valves 28, 30, 32, 34 and 40 forming a valve system, a control system 44 and one or more temperature sensors such as including a temperature sensor 50 to detect a temperature of fluid in the first main fluid line 21, a temperature sensor 52 to detect a temperature of fluid in the second main fluid line 22, and at least one dispensing temperature sensor 54 to respectively detect a corresponding dispensing location temperature of the fluid proximate to a corresponding dispensing location 12 from at least one of the first main fluid line 21 or the second main fluid line 22 at one or more locations associated with a corresponding dispensing location, such as a corresponding dispensing location 12, of the fluid. The locations of the sensors 50, 52 and 54 can depend on the use or application, and should not be construed in a limiting sense.

As shown, the first main fluid line 21 includes an associated control system 44 which is remotely connected to, or in communication with the valve system, such as the control valves 28, 30, 32, 34 and 40, such as by a wired or a wireless communication, for example, to provide valve control for temperature control for a fluid, such as water, by controlling fluid flow in the fluid supply system 10 for fluid conservation. Notably, as illustrated, the control system 44 can be located proximate to the dispensing location 12. However, the control system 44 can also be located remote to the dispensing location 12, in which an interface/module 66 can be provided at the dispensing location 12 to detect the presence of a user. Further it is contemplated that the interface 66 can be equipped with a visual light indicator to advise the user as to when the system is ready for use. For example, the interface 66 can use a series of colors, such as a flashing yellow, to indicate the fluid rejection process is active, or a green light to indicate that the fluid supply system 10 is ready for use at the desired temperature, for example.

Also, the control system 44 can be associated with a first control box 45 and a second control box 46. The first control box 45 is associated with the first main fluid line 21, the intermediate fluid line 17, the first thermal rejection fluid line 24, the control valves 28 and 32 and the temperature sensor 50, and can include a controller 70 to control fluid flow under control of or in conjunction with the control system 44, such as to receive and transmit signals and information to selectively open and close the control valves 28 and 32 and to obtain and transmit a temperature of the fluid flowing in the first main fluid line 21, for example.

The second control box 46 is associated with the second main fluid line 22 and the second thermal rejection fluid line 26, the control valves 30 and 34 and the temperature sensor 52 and can include a controller 72 to control fluid flow under control of or in conjunction with the control system 44, such as to receive and transmit signals and information to selectively open and close the control valves 30 and 34 and to obtain and transmit a temperature of the fluid flowing in the second main fluid line 22, for example. Notably, the first control box 45 and second control box 46 can be combined into a unitary control box 47, similar to as illustrated in FIGS. 7A-7B, for example.

The fluid supply system 10 enables controlling the temperature of the fluid, such as water, flowing to a dispensing location 12, which can be a restroom, kitchen, pool, or virtually any dispensing location 12 where fluid temperature control is desired by the operator or user of the fluid supply system 10. FIG. 1A illustrates the fluid supply system 10, operating in a normal mode, where as such, the fluid supply system 10 supplies fluid from a fluid source, such as the tank 14, to the dispensing location 12. As shown in FIG. 1A, the first main fluid line 21 is connected to or in fluid communication with the fluid source, such as the tank 14, by the fluid source line 20, and the first main fluid line 21 is connected to or in communication with the second main fluid line 22, and both the first and second main fluid lines 21 and 22 are also connected to or in communication with the dispensing location 12, enabling fluid to flow from the fluid source, such as the tank 14, through the first and second main fluid lines 21 and 22 and to the dispensing location 12.

As shown in FIG. 1A, the pump 16 is positioned along the first main fluid line 21 and in communication with the second main fluid line 22, for pumping the fluid, such as water, from the fluid source line 20 through the first and second main fluid lines 21 and 22, as well as through the intermediate fluid line 17 of the first main fluid line 21, to the dispensing location 12, or to recirculate the fluid, in a pressurized state. The pump 16 can be any suitable fluid pump capable of receiving control signals to selectively control or to selectively pressurize the fluid, such as received from the control system 44, to selectively control operation of the pump 16, the pump 16 being suitable for delivering a fluid along the first and second main fluid lines 21 and 22 at a desired rate and at a desired pressure, for example.

As shown in FIG. 1A, for example, the first main fluid line 21 has a first control valve 28, positioned along the first main fluid line 21 for controlling fluid flow through the first main fluid line 21. The first control valve 28 can be a solenoid valve controlled remotely by the control system 44 or any type of valve capable of remote control by the control system 44. Also, it is contemplated that a plurality of first control valves 28 can be positioned along the first main fluid line 21, to control fluid flow at different locations along the first main fluid line 21, for example.

Further, as shown in FIG. 1A, the second main fluid line 22 is connected to or is in fluid communication with the fluid source, such as the tank 14. In an embodiment of the fluid supply system 10, the second main fluid line 22 receives fluid from the first main fluid line 21, but the second main fluid line 22 can also receive fluid from the fluid source, such as the tank 14, independent of the first main fluid line 21, for example. As illustrated, the heater 18, or a heating element, is positioned along the first main fluid line 21 for providing heat to fluid to warm, or heat, the fluid, such as water, passing through the first main fluid line 21. As such, the first main fluid line 21 is a heated line to provide heated or warmed fluid that is heated or warmed, such as to a temperature greater than that of the fluid flowing through the second main fluid line 22, for example. When the fluid is water, for example, the first main fluid line 21 can be a hot water line and the second main fluid line 22 can be a cold water line, for example. As shown, fluid that travels along the first main fluid line 21 can be warmed, or heated, by the heater 18, for example.

In other embodiments of the fluid supply system, the heater 18 can also be positioned in the second main fluid line 22 so that the second main fluid line 22, when the fluid is water, would then be the hot water line and the first main fluid line 21 would be the cold water line, for example. The heater 18 can be remotely controlled, such as by wired or wireless communication, by the control system 44, thereby enabling the fluid passing through the first main fluid line 21 to be selectively heated or warmed on command by the control system 44. However, notably, the heater 18 does not have to be controlled by the control system 44 and can operate completely independent from the control system 44. Similar to the first main fluid line 21, the second main fluid line 22 has a second fluid control valve 30 to control fluid flow through the second main fluid line 22 connected for remote control by the controller system 44.

In an embodiment of the fluid supply system 10, a third fluid control valve 32 is connected to the first thermal rejection fluid line 24 to selectively direct thermally rejected fluid to the first thermal rejection fluid line 24 to deliver the thermally rejected fluid back to the fluid source, such as to the tank 14. Also, a fourth fluid control valve 34 is connected to the second thermal rejection fluid line 26 to selectively direct thermally rejected fluid to the second thermal rejection fluid line 26 to deliver the thermally rejected fluid back to the fluid source, such as to the tank 14. Although in an embodiment of the fluid supply system 10 the second main fluid line 22 is connected to the first main fluid line 21, the second main fluid line 22 can also be configured as a separate second main fluid line 22, receiving fluid from the fluid source, such as the tank 14, and can have a separate fluid pump, such as similar to the pump 16, positioned in the second main fluid line 22 to deliver a fluid along the second main fluid line 22 at a desired rate and at a desired pressure, for example.

The control system 44 controls the fluid flow path in the fluid supply system 10 by selectively controlling the control valves 28-34 and 40. It is contemplated that the control system 44 can be positioned remotely to the control valves 28-34 and 40 or respectively positioned in association with the corresponding fluid lines of the fluid supply system 10, for example. The control system 44 generally includes a controller/processor, which can be separate or incorporated in the control system 44, and can include or be associated with the first control box 45, and the controller 70, and the second control box 46, and the controller 72, for detecting a temperature of the fluid and controlling fluid flow along the first and second main fluid lines 21 and 22, and along the first and second thermal rejection fluid lines 24 and 26. The first control box 45 and the second control box 46 can operate separately as controllers, capable of receiving and relaying signals to and from the control system 44.

As shown in FIGS. 1A, 1B and IC, at least one dispensing temperature sensor 54 is provided on a fluid flow line associated with a corresponding dispensing location 12 proximate to the corresponding dispensing location 12, such as provided on, or in association with, the common thermal rejection return fluid line 27, near valve 40, for example. Also, the location of the one or more dispensing temperature sensors 54 can be positioned at various locations near, or proximate to, and associated with the one or more corresponding dispensing locations 12 to respectively detect a corresponding dispensing location temperature of the fluid received from at least one of the first main fluid line 21 or the fluid from the second main fluid line 22 proximate to a corresponding dispensing location 12, other than as illustrated on the common thermal rejection return fluid line 27, as can depend on the use or application, and should not be construed in a limiting sense.

Based on a temperature measurement by the at least one dispensing temperature sensor 54, such as when compared with a desired temperature or temperature range, as described, the thermal rejection process can be terminated or can be initiated, such as based on such temperature comparison. The other two temperature sensors 50 and 52, while providing a temperature of the fluid respectively passing through the first and second main fluid lines 21 and 22, are usually not sufficient for this task, since the temperature sensors 50 and 52 are typically provided in relative proximity to the fluid source. For example, the thermal rejection process will stop once the temperature of water passing through the valve 40 as detected by the dispensing temperature sensor 54 is equal or substantially equal to or is within some tolerance range of a desired temperature, such as can correspond to the temperature measured by the sensor 50 in the winter operation mode or the sensor 52 in summer operation mode, for example.

FIG. 2 illustrates a generalized embodiment of the control system 44 for use in embodiments of a fluid supply system with temperature control for fluid conservation, although it should be understood that the generalized control system 44 can represent, for example, a stand-alone computer, computer terminal, portable computing device, networked computer or computer terminal, or networked portable device, or other integrated computer processor device. Data and/or requests can be entered into the control system 44 by the user via any suitable type of user interface 66 or request module, and can be stored in computer readable memory 64, which can be any suitable type of computer readable and programmable memory, such as can include a program or instructions to implement the fluid conservation and rejection determination processes and fluid rejection or recirculation processes, as described herein, for example.

It is contemplated that the request module or interface 66 can be positioned with the dispensing location 12, such as a restroom, to initiate the rejection process, and/or detect a user with a device, such as a motion detector. Calculations are performed by the controller/processor 62 which can be any suitable type of computer processor, and can be displayed to the user on the display 60, which can be any suitable type of computer display, such as a liquid crystal display (LCD) or a light emitting diode (LED) display, for example. The controller 70 associated with the first control box 45 and the controller 72 associated with the second control box 46 can be similar to or can include one or more similar components as the control system 44, such as the controller/processor 62, the memory 64, the interface 66 and the display 60, for example.

The controller/processor 62 can be associated with, or incorporated into, any suitable type of computing device, for example, a personal computer, a programmable logic controller (PLC) or an application specific integrated circuit (ASIC). The display 60, the controller/processor 62, the memory 64, and any associated computer readable media are in communication with one another by any suitable type of data bus, as is well known in the art.

Examples of computer readable media include a magnetic recording apparatus, non-transitory computer readable storage memory, an optical disk, a magneto-optical disk, and/or a semiconductor memory (for example, RAM, ROM, etc.). Examples of magnetic recording apparatus that can be used in addition to memory 64, or in place of memory 64, include a hard disk device (HDD), a flexible disk (FD), and a magnetic tape (MT). Examples of the optical disk include a DVD (Digital Versatile Disc), a DVD-RAM, a CD-ROM (Compact Disc-Read Only Memory), and a CD-R (Recordable)/RW.

The control system 44 further is associated with or can include the one or more temperature sensors 50 and 52, such as thermal sensors, for detecting the fluid's temperature at one or more predetermined locations, as the fluid passes through the first and second main fluid lines 21 and 22, and can be associated with one or more dispensing temperature sensors 54 associated with one or more dispensing locations 12 to detect a corresponding dispensing location temperature of fluid passing through at least one of the first and second main fluid lines 21 and 22 associated with the dispensing location(s) 12 proximate to the corresponding dispensing location 12. As shown in FIG. 1A, the control system 44 in conjunction with the first control box 45, the controller 70, and the temperature sensor 50 can be used to detect the thermal properties of the fluid, such as the fluid temperature, as the fluid passes through the first main fluid line 21 and approaches the dispensing location 12.

Also, as shown in FIG. 1A, the control system 44 in conjunction with the second control box 46, the controller 72, and the temperature sensor 52 can be used to detect the thermal properties of the fluid, as the fluid passes through the second main fluid line 22 and approaches the dispensing location 12. It is contemplated that the control system 44 in conjunction with the first control box 45 and in conjunction with the second control box 46 can use one or more temperature sensors, thermocouples or similar temperature detecting devices, to detect the temperature of the fluid as it passes through the corresponding first and second main fluid lines 21 and 22 and a fluid line associated with the dispensing location 12. Notably, it is contemplated that the first control box 45 and second control box 46 can be combined to form a unitary control box 47, as illustrated in FIGS. 7A-7B, for example.

It is contemplated that the control system 44 is programmable, such as by user commands, which can be input remotely or by directly programming the control system 44. In an embodiment of the fluid supply system 10 in FIG. 1A, the control system 44 in conjunction with the first control box 45 detects the temperature (i.e., T_H) signals from the temperature sensor 50 positioned in association with the first main fluid line 21 that corresponds to a hot or warm fluid line, such as a hot water line, and sends one or more signals as to the detected temperature of the fluid in the first main fluid line 21 to the control system 44.

The control system 44 in conjunction with the second control box 46 detects the temperature (i.e., T_C) signals from the temperature sensor 52 positioned in association with the second main fluid line 22 that corresponds to a cold fluid line, such as a cold water line, and sends one or more signals as to the detected temperature of the fluid in the second main fluid line 22 to the control system 44. It is contemplated that the control system 44 can also be activated using on and off indicators, such as a motion detector, as can be associated with the interface 66, such that as a user enters or is in proximity to the dispensing location 12, the motion detector sends a signal to the controller/processor 62 of the control system 44 to initiate detection of the temperature of the fluid in one or more of the first main fluid line 21 or second main fluid line 22 and at a location associated with a corresponding dispensing location 12 proximate to the corresponding dispensing location 12 by at least one dispensing temperature sensor 54.

In an embodiment of the fluid supply system 10 in FIG. 1A, the first control box 45 is positioned to detect the fluid temperature along the relatively hot or warm first main fluid line 21, so that the first control box 45 in conjunction with the control system 44 can selectively control fluid flow along the fluid lines, such as along the first main fluid line 21 and the first thermal rejection fluid line 24, in the fluid supply system 10, in cooperation with the control system 44 and the second control box 46. The first control box 45 receives signals from the control system 44, such as from the controller/processor 62. The first control box 45 is in communication with the control valves 28 and 32 and, as such, based on the signals received from the control system 44, can selectively close or open the control valves 28 and 32 based on control signals from the control system 44 to selectively direct fluid flow along the first main fluid line 21 and the first thermal rejection fluid line 24.

The second control box 46 is positioned to detect the fluid temperature along the relatively cold second main fluid line 22, so that the second control box 46 can control fluid flow along the fluid lines, such as along the second main fluid line 22 and the second thermal rejection fluid line 26, in the fluid supply system 10, in cooperation with the first control box 45. The second control box 46 receives signals from the control system 44, such as from the controller/processor 62. The second control box 46 is in communication with the control valves 30 and 34 and, as such, based on the signals received from the control system 44, can selectively close or open the control valves 30 and 34 based on signals from the control system 44 to selectively direct fluid flow along the second main fluid line 22 and the second thermal rejection fluid line 26.

Continuing with reference to FIGS. 1A-1C, in operation, the fluid supply system 10 uses the control system 44, the control valves 28-34 and 40, the first and second main fluid lines 21 and 22, the first and second thermal rejection fluid lines 24 and 26, one or more of the temperature sensors 50 and 52 and at least one dispensing temperature sensor 54, and the common thermal rejection return fluid line 27, to control or adjust the temperature of the fluid flowing to the dispensing location 12, and to recirculate the fluid, such as water, to the fluid source, such as the tank 14, that does not fit the fluid temperature profile, so as to conserve the fluid, such as water, that does not meet the temperature profile desired, i.e. a “T_DESIRED” temperature or temperature range.

The T_DESIRED temperature can be a preprogrammed desired temperature or a desired temperature range such as in relation to or based on a detected T_H temperature of the fluid flowing along the first main fluid line 21 or a detected T_C temperature of the fluid flowing along the second main fluid line 22, or can be a temperature or a temperature range for the T_DESIRED temperature manually input by the operator or user to the control system 44, such as through the interface 66, for example. In operation, the user can initiate the fluid control/rejection process in the fluid supply system 10 by preprogramming the T_DESIRED temperature or temperature range in the control system 44. The programming process can be performed remotely or directly at the control system 44, such as through the interface 66.

To control, adjust or maintain the T_DESIRED temperature or temperature range of the fluid, such as water, the fluid supply system 10 is capable of operating in several modes, namely a normal mode, such as illustrated in FIG. 1A, in which the temperature of the fluid substantially is at a corresponding T_DESIRED temperature or substantially falls in a T_DESIRED temperature range for the corresponding T_DESIRED temperature, a warming mode, such as illustrated in FIG. 1B, in which the temperature of the fluid is lower or substantially lower than a corresponding T_DESIRED temperature or is lower or substantially lower than a T_DESIRED temperature range for the corresponding T_DESIRED temperature, and a cooling mode, such as illustrated in FIG. 1C, in which the temperature of the fluid is higher or substantially higher than a corresponding T_DESIRED temperature or higher or substantially higher than a T_DESIRED temperature range for the corresponding T_DESIRED temperature.

Prior to the initiation of the warming mode or the cooling mode, fluid can flow along the first main fluid line 21 and second main fluid line 22 as in the normal mode. As to initiating the cooling mode, fluid flow typically continues in the normal mode until the at least one corresponding dispensing temperature sensor 54 detects a T_W temperature of fluid passing through at least the second main fluid line 22 proximate to a corresponding dispensing location 12 associated with a corresponding dispensing location 12 that is higher or substantially higher than a corresponding T_DESIRED temperature or a T_DESIRED temperature range, the corresponding T_DESIRED temperature or temperature range can be based on the T_C temperature, such as detected by the temperature sensor 52, and it is determined by the control system 44, based on a comparison of the T_W temperature with the corresponding T_DESIRED temperature or temperature range, that the fluid flowing in the cold fluid line of the second main fluid line 22 is too warm.

Also, as to initiating the warming mode, fluid flow typically continues in the normal mode until the at least one corresponding dispensing temperature sensor 54 detects a T_W temperature of fluid passing through at least the first main fluid line 21 proximate to a corresponding dispensing location 12 associated with a corresponding dispensing location 12 and positioned to detect a temperature of fluid received from the first main fluid line 21 that is lower or substantially lower than a corresponding T_DESIRED temperature or a T_DESIRED temperature range, the corresponding T_DESIRED temperature or temperature range can be based on the T_H temperature, such as detected by the temperature sensor 50, and it is determined by the control system 44, based on a comparison of the T_W temperature with the corresponding T_DESIRED temperature or temperature range, that the fluid flowing in the warm fluid line of the first main fluid line 21 is too cold.

It should be understood that T_C (sensed at temperature sensor 52) and T_H (sensed at temperature sensor 50) are the cold and hot temperatures coming from the first main fluid line 21 and second main fluid line 22 and the heater 18, respectively. These T_C and T_H temperatures typically can correspond to the fluid sources' respective temperatures, such as can correspond to the fluid source warm temperature and the fluid source cold temperature, for example. The controllers compare these readings to the water temperature at or near valve 40 in a fluid line associated with a corresponding dispensing location 12 proximate to a corresponding dispensing location 12, measured by the at least one dispensing temperature sensor 54 (in FIGS. 1A, 1B and 1C) positioned at least at one corresponding location to detect a corresponding dispensing location temperature of fluid received from the first main fluid line 21 or received from the second main fluid line 22. The reading of the at least one dispensing temperature sensor 54 (T_W) is a basis for termination of the non-normal operation mode or for initiation of the warming mode or the cooling mode. Thus, the T_DESIRED temperature is T_H+/−tolerance or is T_C+/−tolerance, for example. The T_C or T_H temperature is used to set a target temperature or a T_DESIRED temperature or temperature range, for example.

As an example, in a warming or heating mode, a T_DESIRED temperature=T_H 3° C. Control system 44 receives readings from temperature sensors 54 and 50. If T_W (from the at least one dispensing temperature sensor 54)<T_DESIRED=T_H (from sensor 50)−3° C. then the warming mode continues. If T_W≧T_DESIRED, then the process is terminated by the controller 44 and the control system 44 resumes normal flow in the fluid supply system 10. It should be noted that a T_DESIRED temperature is typically always dependent on the corresponding source temperature of the warm water or of the cold water, such as the T_H temperature or the T_C temperature, for example. A comparison of the T_W temperature with the corresponding T_DESIRED temperature or temperature range can allow for termination of the rejection process (a warming, or heating, mode or a cooling mode).

In order to start the warming (or heating)/cooling mode, the user can initiate the process manually, or the control system 44 can initiate the process based on pre-programmed times, for example. Also, initiation of the warming, or heating, or cooling mode can be based on restroom occupancy (from an occupancy sensor) or from a user proximity sensor, for example. It should be noted that control system 44 and the display 60 need not to be on the water tap at a dispensing location 12. For example, users may not like to replace their water taps with modified versions, thus control system 44 and the display 60 can be provided as a plug-in device in the wall, for example, and should not be construed in a limiting sense.

In determining whether the T_W temperature associated with the dispensing location 12 of the fluid, such as water, flowing in the first main fluid line 21 is at the corresponding T_DESIRED temperature or temperature range, as can be based on the detected T_H temperature, the temperature sensor 50 detects the T_H temperature of the fluid as it passes through the first main fluid line 21 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid received from the first main fluid line 21 proximate to a corresponding dispensing location 12 detects a T_W temperature associated with the dispensing location 12, and the temperature sensors 50 and 54 send corresponding signals to the control system 44, such as from the controller 70 of the first control box 45, containing real time temperature data of the temperature detected of the fluid passing through the first main fluid line 21.

The control system 44 then compares the T_W temperature with the corresponding T_DESIRED temperature or temperature range, and based on the comparison of the T_W temperature with the corresponding T_DESIRED temperature or temperature range, determines whether the fluid flowing in the warm fluid line of the first main fluid line 21 is too cold. This comparison is typically between sensors 54 and 50 in the warming, or heating, mode and between sensors 54 and 52 in the cooling mode, for example.

Also, in determining whether the T_W temperature associated with the dispensing location 12 of the fluid, such as water, flowing in the second main fluid line 22 is at the T_DESIRED temperature or temperature range, as can be based on the detected T_C temperature, the temperature sensor 52 detects the T_C temperature of the fluid as it passes through the second main fluid line 22 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature proximate to a corresponding dispensing location 12 of fluid received from the second main fluid line 22 detects a T_W temperature associated with the dispensing location 12, and the temperature sensors 52 and 54 send corresponding signals to the control system 44, such as from the controller 72 of the second control box 46, containing real time temperature data of the temperature detected of the fluid passing through the second main fluid line 22.

As previously stated, this data transmission can be done remotely, and can be done using a wired or a wireless transmission, or other means of transmission, generally known in the art. The control system 44 then compares the T_W temperature with the corresponding T_DESIRED temperature or temperature range, and based on the comparison of the T_W temperature with the corresponding T_DESIRED temperature or temperature range, determines whether the fluid flowing in the cold fluid line of the first main fluid line 22 is too warm. The comparison here is typically between sensors 54 and 50 in the warming, or heating, mode and between sensors 54 and 52 in the cooling mode, for example.

The control system 44, such as by the controller/processor 62, using temperature profile data, such as including the T_DESIRED temperature, temperatures or temperature ranges, as can be stored in the memory 64, performs, depending upon whether a warm, or hot, fluid or a cold fluid, such as warm, or hot, or cold water, is desired, at least one of a comparison between the detected T_H temperature or the corresponding T_DESIRED temperature or temperature range for the relatively warm, or hot, water or performs a comparison of the detected T_C temperature or the corresponding T_DESIRED temperature or temperature range for the relatively cold water with the corresponding detected dispensing location temperature T_W of fluid passing through at least one or more of the first main fluid line 21 and the second main fluid line 22 proximate to a corresponding dispensing location 12 of the at least one dispensing temperature sensor 54.

Based on the comparison of detected T_C or detected T_H temperatures and/or the corresponding T_DESIRED temperature or temperature range with the corresponding detected dispensing location temperature T_W of the at least one dispensing temperature sensor 54, the control system 44 sends one or more control signals to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 by selectively opening or closing the control valves accordingly to direct the flow of the fluid, such as water, in the fluid lines to maintain or to adjust the temperature of the fluid and to selectively place the fluid supply system 10 in the normal mode, the warming mode or the cooling mode. Also, based upon the comparison of the T_W temperature detected by the corresponding at least one dispensing temperature sensor 54 and the T_DESIRED temperature or temperature range, embodiments of a fluid supply system, such as the fluid supply system 10, can operate in at least one of the normal mode, the warming mode or the cooling mode, for example. This comparison is typically between sensors 54 and 50 in the warming, or heating, mode and between sensors 54 and 52 in the cooling mode, for example.

Referring to FIG. 1A, there is illustrated the fluid supply system 10 operating in the normal mode, with the arrows in FIG. 1A indicating a direction of fluid flow in the normal mode. In the event that it is determined that the T_W temperature of the at least one dispensing temperature sensor 54 is at or substantially is at the corresponding T_DESIRED temperature or is in or substantially falls in a temperature range for the corresponding T_DESIRED temperature for the hot fluid, such as hot water, or it is determined that the T_W temperature of the at least one dispensing temperature sensor 54 is at or substantially is at the corresponding T_DESIRED temperature or is in or substantially falls in a temperature range for the corresponding T_DESIRED temperature for the cold fluid, such as cold water, the fluid supply system 10 is determined to be in the normal mode.

In the normal mode of operation, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 to selectively open or close the control valves for operation. In the normal mode, the control valves 28, 30 are in the open position and the control valves 32, 34 and 40 are in the closed position. As indicated by the arrows in FIG. 1A, in the normal mode, the relatively warm fluid, such as warm water, flows from the fluid source, such as from the tank 14, through the first main fluid line 21 to the dispensing location 12, and the relatively cold fluid, such as cold water flows through the second main fluid line 22 to the dispensing location 12. In an embodiment of fluid supply system 10, in the normal mode, fluid flow does not occur through the first and second thermal rejection fluid lines 24 and 26 and does not occur through the common thermal rejection return fluid line 27.

Referring now to FIG. 1B, there is illustrated the fluid supply system 10 operating in the warming mode. In the warming mode, relatively cold fluid is recirculated through the fluid supply system 10 and back to the fluid source, such as the tank 14. The warming mode is typically activated when the fluid supply system 10 is operating in a cold climate or during winter. In such occasion, it is typically desirable that the fluid temperature of the fluid flowing in the fluid supply system 10, such as water, be warmed, or heated.

In determining whether the warming mode is activated, the temperature sensor 50 detects the T_H temperature of the fluid, such as water, as it passes through the first main fluid line 21 at its location and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid received from the first main fluid line 21 proximate to a corresponding dispensing location 12 detects a T_W temperature associated with the corresponding dispensing location 12, and the sensors 50 and 54 send a corresponding signal or signals as to the detected temperature to the control system 44, such as from the controller 70 of first control box 45, containing real time temperature data. Based on the detected T_H temperature, a corresponding T_DESIRED temperature or temperature range is set. For example, a corresponding T_DESIRED temperature=T_H−tolerance (e.g., 2° C.).

As previously stated, the data transmission of the detected temperature can be done remotely, such as using wireless or wired transmission, or other means of transmission generally known in the art. The control system 44, such as the controller/processor 62, performs a comparison between the detected dispensing location temperature T_W of the at least one corresponding dispensing temperature sensor 54 and a corresponding T_DESIRED temperature or temperature range. Based on that comparison, if the control system 44 determines the warming mode is to be activated, the control system 44 sends one or more control signals to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 by selectively opening or closing the valves accordingly to direct the flow of the fluid in the fluid lines, such as water, to adjust the temperature of the fluid, that is too cold, flowing in the first main fluid line 21.

In the event that it is determined that the dispensing location temperature T_W temperature detected by the at least one corresponding dispensing temperature sensor 54 is less than or substantially less than that of the T_DESIRED temperature or temperature range, i.e., the fluid is too cold flowing through the warm first main fluid line 21 proximate to a corresponding dispensing location 12, the warming mode in FIG. 1B is indicated and can be commenced. In the warming mode, in an embodiment of the fluid supply system 10 in FIG. 1B, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 to selectively open or close the control valves for operation.

In the warming mode, the control valves 28, 34, and 40 are in the open position and the control valves 30, and 32 are in the closed position. As indicated by the arrows in FIG. 1B, in the warming mode, the warm fluid, that is at the T_W temperature less than the T_DESIRED temperature or temperature range, flows from the fluid source, such as from the tank 14, through the first main fluid line 21 and is recirculated back through the common thermal rejection return fluid line 27, through the second main fluid line 22 in a reverse direction to a normal flow direction, through the second thermal rejection fluid line 26 and through the central thermal rejection return fluid line 25 back to the fluid source, such as to the tank 14. As such, the fluid is sent along the first main fluid line 21 and recirculated along the second thermal rejection fluid line 26.

The warm first main fluid line 21 and second thermal rejection line 26 circulate the fluid back to the fluid source, such as to the tank 14, and during the recirculation, the T_W temperature is detected by the temperature sensor 54, as discussed. The fluid is recirculated until the T_W temperature is substantially at or equal to the T_DESIRED temperature or is in or substantially falls in a desired temperature range for the T_DESIRED temperature, such as at a desired temperature within +/− of 5 degrees Centigrade (C) of the T_H temperature, for example.

When the dispensing location temperature T_W detected by the at least one corresponding dispensing temperature sensor 54 substantially is at or equal to the T_DESIRED temperature or the T_W temperature is in or substantially falls in a desired temperature range for the T_DESIRED temperature, the user of the fluid, such as at the corresponding dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44, or by an auditory signal, and the control valves, such as the control valves 28-34 and 40, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 1A. As discussed, in the normal mode, the control valves 28 and 30 are in the open position and the control valves 32, 34 and 40 are in the closed position.

Referring now to FIG. 1C, there is shown the fluid supply system 10, operating in the cooling mode, for rejecting fluid that is too warm or hot flowing through the second main fluid line 22. In determining whether the cooling mode is activated, the temperature sensor 52 detects the T_C temperature of the fluid, such as water, as it passes through the second main fluid line 22 at its location and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid proximate to a corresponding dispensing location 12 received from the second main fluid line 22 detects a T_W temperature associated with the dispensing location 12, and the sensors 52 and 54 send a corresponding signal or signals as to the detected temperature to the control system 44, such as from the controller 72 of second control box 46, containing real time temperature data.

Based on the detected T_C temperature, a corresponding T_DESIRED temperature or temperature range can be set. For example, a corresponding temperature T_DESIRED=T_C+tolerance (e.g. 3° C.). In determining whether to activate the cooling mode, the at least one dispensing temperature sensor 54 detects the T_W temperature of the fluid, such as water, as it passes through a fluid line associated with the dispensing location 12 at its location, and sends a signal or signals as to the detected T_W temperature to the control system 44, such as from the controller 72 of second control box 46, containing real time temperature data for comparison with the T_DESIRED temperature or temperature range, for example. It should be noted that this fluid rejection determination process can be user initiated or controller initiated, such as initiated by the controller of the control system 44 at predetermined, periodic or at random times, for example, to receive temperatures detected by the temperature sensors, such as the temperature sensors 50, 52 and 54, for example. The temperature sensors, when the fluid rejection determination process is user initiated, can be used to generate a termination condition, such as to terminate the cooling mode or the warming mode, for example.

As previously stated, the data transmission of the detected temperature can be done remotely, using wireless or wired transmission, or other means of transmission generally known in the art. The control system 44, such as by the controller/processor 62, performs a comparison of the detected T_C temperature and/or the T_DESIRED temperature or temperature range with the corresponding dispensing location temperature T_W detected by the at least one dispensing temperature sensor 54 and, based on that comparison, if the cooling mode is indicated, the control system 44 sends one or more control signals to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 by selectively opening or closing the control valves accordingly to direct the flow of the fluid, such as water, in the fluid lines to adjust the temperature of the fluid, that is too warm, flowing in the second main fluid line 22.

In the event that it is determined that the dispensing location temperature T_W detected by the at least one dispensing temperature sensor 54 is greater than or substantially greater than that of the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too warm flowing through the cold second main fluid line 22 proximate to a corresponding dispensing location 12, the cooling mode in FIG. 1C is indicated and can be commenced. In the cooling mode, in an embodiment of the fluid supply system 10 in FIG. 1C, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the control valves 28-34 and 40 to selectively open or close the control valves for operation.

In the cooling mode, the control valves 30, 32 and 40 are in the open position and the control valves 28 and 34 are in the closed position. As indicated by the arrows in FIG. 1C, in the cooling mode, the relatively hot fluid that is at the T_W temperature greater than the T_DESIRED=Tc+3° C. temperature or temperature range, for example, flows from the fluid source, such as from the tank 14, through the second main fluid line 22 and is recirculated back through the common thermal rejection return fluid line 27, through the first main fluid line 21 in a reverse direction to a normal flow direction and through the first thermal rejection fluid line 24 back to fluid source, such as to the tank 14. As such, fluid is sent along the second main fluid line 22 and recirculated along the first thermal rejection fluid line 24.

The cold second main fluid line 22 and first thermal rejection fluid line 24 circulate the fluid back to the fluid source, such as to the tank 14, and, during the recirculation, the dispensing location temperature T_W is detected by the corresponding at least one temperature sensor 54 proximate to a corresponding dispensing location 12, as discussed. The fluid is recirculated until the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a range of the T_DESIRED temperature, such as at a desired temperature within +/− of 3 to 5 degrees Centigrade (C) of the T_C temperature, for example. When the T_W temperature approaches the desired temperature, the user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44, and the control valves, such as the control valves 28-34 and 40, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 1A.

As shown in the drawings in FIG. 1C, in the cooling mode, the fluid travels along the second main fluid line 22 and reaches the valve 30 in an open condition, enabling fluid flow therethrough. The control valve 40 is open enabling fluid to flow through the common thermal rejection return fluid line 27 recirculating the fluid back in a reverse direction along the first main fluid line 21. Fluid control valve 32 is open to the first thermal rejection fluid line 24 and control valve 28 is closed preventing fluid from flowing further back into the warm first main fluid line 21. As such, the fluid travels along the first thermal rejection fluid line 24 and through the central thermal rejection return fluid line 25 and back to fluid source, such as to the tank 14. In such case, the fluid source, such as the tank 14, can use a fluid cooling system 15, such as a compressor type cooling system, to chill the fluid further, for example, such as under control of the control system 44, for example.

As discussed, the fluid flows and is recirculated until the at least one temperature sensor 54 associated with the corresponding dispensing location 12 and positioned to detect a corresponding dispensing location temperature proximate to a corresponding dispensing location 12 of fluid received from the second main fluid line 22, such as located along the common thermal rejection return fluid line 27, for example, detects that the T_W temperature is at, substantially is at or is in or substantially falls in a temperature range of the T_DESIRED temperature, such as at a desired temperature within 3 to 5+/− degrees Centigrade (C) of the T_C temperature, for example.

If so, at this point the control system 44 in conjunction with the controller 70 of the first control box 45 closes the control valve 32 to block fluid flow through the first thermal rejection fluid line 24 and re-opens the control valve 28 to allow forward flow of the fluid through the first main fluid line 21, and the control system 44 closes the control valve 40 to block flow through the common thermal rejection return fluid line 27 and continues to leave open the control valve 30 to allow fluid to flow through the second main fluid line 22, and fluid flows to the dispensing location 12, to switch the flow of fluid of the fluid supply system 10 back to a normal flow in the normal mode, as illustrated in FIG. 1A. Again, as discussed, in the normal mode, the control valves 28, and 30, are in the open position and the control valves 32, 34 and 40 are in the closed position.

Referring now to FIG. 3, there is shown an embodiment of a dispensing location 112 as can be included in an embodiment of a fluid supply system, such as the fluid supply system 10, illustrating another configuration for receiving fluid at the dispensing location 112, for example. The control system 44, as discussed, can also be associated with the dispensing location 112 to control flow of a fluid, such as water, to, within and from the dispensing location 112, as well as again controlling the fluid flow and recirculation in the fluid supply system, such as in the fluid supply system 10, in the normal, warming and cooling modes, as discussed.

In an embodiment of the dispensing location 112, for example, the first and second main fluid lines 21 and 22 feed into the dispensing location 112, where the T_H (T_W) dispensing location temperature of the fluid flowing in the warm first main fluid line 21 is detected at or proximate to the dispensing location 112 by one or more dispensing temperature sensors 154h and the T_C (T_w) dispensing location temperature of the fluid flowing in the cold second main fluid line 22 is detected by one or more dispensing temperature sensors 154c at or proximate to the dispensing location 112. Mixing fluid outlets, or mixers, 170, 172, 174, e.g., mixer 1, mixer 2 and mixer 3, are provided as a mixing stage for distributing fluid from the dispensing location 112 at one or more preselected temperatures, such as under control of the control system 44, for example.

As shown in FIG. 3, the dispensing temperature sensors 154h and 154c are positioned in association with and near or proximate to the dispensing location 112. The dispensing location temperature readings are compared against a corresponding T_DESIRED temperature or temperature range. In the embodiment of FIGS. 3 and 4 a corresponding T_DESIRED temperature can have two temperatures; i.e., one for the hot line and one for the cold/normal line. These two desired temperatures for the corresponding T_H T_DESIRED temperature and the corresponding T_C T_DESIRED temperature typically are based on measurements near the sources, i.e., the heater 18 and the main tank, such as tank 14, such as illustrated and described in relation to FIGS. 1A-1C, for example. The lines 21 and 22 are typically substantially different from one another with respect to temperature, giving the user freedom to choose a user's desired temperature through the mixer. Since, there is only one season at a time, either typically the line 21 is too cold (such as in winter) or the line 22 is too warm, or hot (such as in summer). Thus, the fluid is typically recirculated until the fluid temperature detected by a corresponding at least one of the dispensing temperature sensors 154h and 154c proximate to the dispensing location 112 approaches a T_DESIRED temperature or temperature range as can correspond to a source temperature of the fluid, for example.

When the fluid flowing in the first or second main fluid lines 21 and 22 is not substantially at a corresponding T_DESIRED temperature or substantially falls outside of a temperature range for the corresponding T_DESIRED temperature, such as based on a comparison with the detected temperature T_H (T_W) or T_C (T_W) from a corresponding at least one of the dispensing temperature sensors 154h or 154c, a thermal rejection line 124, such as in association with one or more control valves, is provided for recirculating rejected fluid back, such as to the common thermal rejection return fluid line 27, to recirculate the fluid back through at least one of the first main fluid line 21 or the second main fluid line 22, and back through the respective first or second thermal rejection fluid lines 24 or 26 and through the central thermal rejection return fluid line 25 to the fluid source, such as to the tank 14, for temperature modification, such as discussed with respect to FIG. 1B for the warming mode and as discussed with respect to FIG. 1C for the cooling mode.

The fluid is recirculated until at least one of the T_H (T_W) temperature of the fluid flowing in the warm first main fluid line 21 or the T_C (T_W) temperature of the fluid flowing in the cold second main fluid line 22 detected by one or more of the corresponding dispensing temperature sensors 154c and/or 154h substantially is at or substantially falls in a temperature range for a corresponding T_DESIRED temperature to provide a corresponding desired preselected temperature or temperature range of the fluid in one or more of the mixing fluid outlets, or mixers, 170, 172 and 174, as by selectively mixing the fluid flowing in the first and second main fluid lines 21 and 22, to provide substantially the corresponding desired preselected one or more temperatures or temperature ranges for the fluid in one or more of the mixing fluid outlets, or mixers, 170, 172 or 174.

Therefore, the fluid supply system 10 can enable the fluid, to be recirculated, as discussed, and the thermal rejection line 124 recirculates the fluid back through at least one of the first or second main fluid lines 21 or 22 to recirculate the fluid back to the fluid source, such as to the tank 14, to adjust the temperature of the fluid flowing through at least one of the first or second main fluid lines 21 or 22 until the fluid is substantially at a corresponding T_DESIRED temperature or substantially falls in a temperature range for the T_DESIRED temperature to provide substantially a corresponding one or more preselected desired temperatures or temperature ranges of the fluid in one or more of the mixing fluid outlets, or mixers, 170, 172 and 174. Therefore, an embodiment of the fluid supply system 10 including an embodiment of the dispensing location 112 can likewise apply the aforementioned processes to modify the temperature of the fluid by recirculating fluid back through the fluid supply system 10, as discussed, that does not meet the desired temperature profile.

Referring now to FIG. 4, there is shown an embodiment of a dispensing location 212 as can be included in an embodiment of a fluid supply system, such as the fluid supply system 10, illustrating a further configuration for receiving fluid at the dispensing location 212, for example. The warm fluid from the first main fluid line 21 enters the dispensing location 212 and the T_H (T_W) temperature of the fluid from the first main fluid line 21 is detected by one or more dispensing temperature sensors 250 located proximate to and in association with the dispensing location 212, and the cold fluid from the second main fluid line 22 enters the dispensing location 212 and the T_C (T_W) temperature of the cold fluid from the second main fluid line 22 is detected by one or more dispensing temperature sensors 252 located proximate to and in association with the dispensing location 212.

In the event the T_H (T_W) temperature of the fluid from the first main fluid line 21 detected by the one or more dispensing temperature sensors 250 or the T_C (T_W) temperature of the fluid from the second main fluid line 22 detected by the one or more dispensing temperature sensors 252 is not at or substantially is not at a corresponding desired preselected T_DESIRED temperature or is not in or does not substantially fall in a corresponding desired preselected temperature range for the T_DESIRED temperature, the fluid that does not meet the corresponding T_DESIRED temperature or temperature range is then pumped from a location at or near the dispensing location 212 using a recirculation pump 216 and is recirculated back along the first main fluid line 21 in the case that the detected temperature of the fluid is too warm, in the cooling mode, as discussed in relation to FIG. 1C, and is recirculated back along the second fluid line 22 in the case that the detected temperature of the fluid is too cold, in the warming mode, as discussed in relation to FIG. 1B, for example. As mentioned above, in the embodiment of FIG. 4, a corresponding T_DESIRED temperature can have two desired temperatures, i.e., one for the warm, or hot, line and one for the cold line. These two desired temperatures typically can be based on measurements near the fluid sources, i.e., near the heater 18 and near the main tank, such as tank 14, for example.

FIGS. 5A, 5B and 5C illustrate another embodiment of a fluid supply system 100. In an embodiment of the fluid supply system 100, control valves can be arranged in a valve system that can include a plurality of valve systems including a first valve system 110, a second valve system 120 and a third valve system 130. Each valve system 110, 120 and 130 includes one or more control valves, which can be three-way valves, or the like, to control fluid flow through the respective first main fluid line 21 including it first and second parts 21a and 21b, the intermediate line 17, the second main fluid line 22 and the first and second thermal rejection fluid lines 24 and 26.

As shown in FIGS. 5A-5C, the first valve system 110 has a three-way valve selectively connecting first main fluid line 21, including the intermediate line 17, which is receiving fluid after being pressurized by the pump 16, the first part 21a of the first main fluid line 21 leading from the heater 18, the second part 21b of the first main fluid line 21 and the first thermal rejection fluid line 24. Similarly, the second valve system 120 has a three-way valve that selectively connects a first part 22a of the second main fluid line 22, a second part 22b of the second main fluid line 22 and the second thermal rejection fluid line 26. The third valve system 130 is in communication with the common thermal rejection return fluid line 27 and can allow fluid to recirculate to flow back to the fluid source, such as the tank 14, through the respective first main fluid line 21 and the second main fluid line 22, into the respective first and second thermal rejection fluid lines 24 and 26, when necessary, which feed into the central thermal rejection return fluid line 25, as shown. Similar to that of valve systems 110 and 120, the valve system 130 can include a three-way valve, or a two-way valve, if necessary, for example.

As illustrated in FIGS. 5A-5C, the fluid supply system 100 including the valve system having the first, second and third valve systems 110, 120 and 130 operates similar to that of the aforementioned embodiment of the fluid supply system 10 of FIGS. 1A-1C, in the normal mode, the warming mode and the cooling mode, and the fluid supply system 100 can include similar components and elements, as discussed in relation to operation of the fluid supply system 10 of FIGS. 1A-1C. However, in an embodiment of the fluid supply system 100, the valve system uses a plurality of valve systems including three-way valves, such as three-way solenoid valves, for example. The fluid supply system 100 operates to selectively control fluid flow in the fluid supply system 100 through the valve systems 110, 120 and 130. In the fluid supply system 100, fluid flow is controlled by the control system 44 and can be based on the detected temperature at the temperature sensors 50, 52 and 54, similar to that discussed in relation to the fluid supply system 10 of FIGS. 1A-1C, for example.

FIG. 5A illustrates normal fluid flow through the fluid supply system 100 in the normal mode of operation, with the arrows in FIG. 5A indicating a direction of fluid flow in the normal mode. In the event that it is determined that the dispensing location temperature T_W detected by the at least one dispensing temperature sensor 54 associated with a corresponding dispensing location 12 of fluid passing through at least one the first main fluid line 21 proximate to a corresponding dispensing location 12 is at or substantially is at or is in or substantially falls in a temperature range of the T_DESIRED temperature for the hot fluid, such as hot water, or it is determined that the dispensing location temperature T_W detected by the at least one dispensing temperature sensor 54 associated with a corresponding dispensing location 12 of fluid passing through at least the second main fluid line 22 proximate to a corresponding dispensing location 12 is at or substantially is at or is in or substantially falls in a temperature range of the T_DESIRED temperature for the cold fluid, such as cold water, the fluid supply system 100 is determined to be in the normal mode.

The location of the one or more dispensing temperature sensors 54 in the fluid supply system 100 can be positioned at various locations near, or proximate to, and associated with the corresponding at least one dispensing location 12 to respectively detect a corresponding temperature of the fluid received from the first main fluid line 21 and the fluid from the second main fluid line 22, other than as illustrated on the common thermal rejection return fluid line 27, as can depend on the use or application, and should not be construed in a limiting sense.

In the normal mode, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the valve systems 110, 120 and 130, to selectively open or close the valves for operation. In the normal mode, fluid flows from the respective first and second main fluid lines 21 and 22 to the dispensing location 12. As shown, the dispensing location 12 includes an interface 66 to initiate a determination of a fluid rejection process. With respect to FIGS. 1A-1C, 2, 5A-5C, 6A-6B and 7A-7B, the interface 66 can include a manual button for a user to initiate fluid rejection or a fluid rejection determination process, or the interface 66 can also include a motion sensor 66 to initiate the fluid rejection determination process when a user is detected or proximate to the dispensing location 12, for example. Further it is contemplated that the control system 44 can be pre-programmed to detect fluid temperatures at the sensors 50, 52 and 54 such that when the temperature of the fluid is detected at a temperature above or below the corresponding preselected temperature or temperature range, the fluid rejection process is initiated.

Also, in the fluid supply system 100, the valve system 110 selectively enables or prohibits flow through the first part 21a and the second part 21b of the first main fluid line 21, the valve system 120 selectively enables or prohibits flow through the first part 22a and the second part 22b of the second main fluid line 22, and the third valve system 130 selectively enables or prohibits flow through the common thermal rejection return fluid line 27. As indicated by the arrows in FIG. 5A, in the normal mode, the relatively warm fluid, such as warm water, flows from the fluid source, such as from the tank 14, through the first main fluid line 21 to the dispensing location 12, and the relatively cold fluid, such as cold water, flows through the second main fluid line 22 to the dispensing location 12. In an embodiment of fluid supply system 100, in the normal mode, fluid flow does not occur through the first and second thermal rejection fluid lines 24 and 26 and the central thermal rejection return fluid line 25 and does not occur through the common thermal rejection return fluid line 27.

Referring now to FIG. 5B, there is illustrated the fluid supply system 100 operating in the warming mode. To determine whether to operate the fluid supply system 100 in the warming mode, the temperature sensor 50 detects the T_H temperature of the fluid, such as water, as it passes through the first main fluid line 21 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid received from the first main fluid line 21 proximate to a corresponding dispensing location 12 detects a corresponding dispensing location temperature T_W associated with the corresponding dispensing location 12, and the temperature sensors 50 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 70 of the first control box 45, containing real time temperature data.

The control system 44 performs a comparison between the detected dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_u temperature of the fluid, to determine a mode of operation for the fluid supply system 100 as to the water passing through the first main fluid line 21, such as performed by the controller/processor 62.

In the event that it is determined that the detected dispensing location temperature T_W is less than or substantially less than that of the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too cold flowing through the warm first main fluid line 21, the warming mode in FIG. 5B is indicated and can be commenced. In the warming mode, illustrated in FIG. 5B, the control system 44 also sends one or more corresponding signals to the valve systems 110, 120 and 130 to operate the valve systems 110, 120 and 130 in the warming mode.

As indicated by the arrows in FIG. 5B, in the warming mode, the fluid that is at the dispensing location temperature T_W at its detected location(s) that is less than the T_DESIRED temperature or temperature range flows from the fluid source, such as from the tank 14, through the first main fluid line 21 and is recirculated back through the common thermal rejection return fluid line 27, through the second main fluid line 22 in a reverse direction to a normal flow direction and through the second thermal rejection fluid line 26 back to the fluid source, such as to the tank 14. As such, the fluid is sent along the first main fluid line 21 through the common thermal rejection return fluid line 27 and recirculated back through the second thermal rejection fluid line 26.

In the warming mode of FIG. 5B, the first valve system 110 is open to enable fluid to flow along the first and second parts 21a and 21b of the first main fluid line 21, and is closed to the first thermal rejection fluid line 24. The fluid flows through the valve system 130 through the common thermal rejection return fluid line 27, and is circulated back to the fluid source, such as the tank 14, through the second part 22b of the second main fluid line 22 and through the second thermal rejection fluid line 26. The fluid is recirculated until the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a corresponding temperature range of the T_DESIRED temperature, such as at a desired temperature within +/− of 5 degrees Centigrade (C) of the T_DESIRED temperature, for example.

When the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, a user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve systems 110, 120 and 130, under control of the control system 44, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 5A.

In this regard, when the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, the control system 44 controls the valve system 120 to open flow of fluid to both the first part 22a and the second part 22b of the second main fluid line 22 and to close the flow of fluid to the second thermal rejection fluid line 26, and controls the valve system 130 to close fluid flow through the common thermal rejection return fluid line 27, controls the valve system 110 for the first thermal rejection fluid line 24 and the central thermal rejection return fluid line 25 to remain closed and to continue fluid flow through both the first part 21a and the second part 21b of the first main fluid line 21, and fluid flows to the corresponding dispensing location 12, to resume normal operation in the normal mode of the fluid supply system 100, such as illustrated in FIG. 5A.

Referring now to FIG. 5C, there is shown the fluid supply system 100, operating in the cooling mode for rejecting fluid that is too warm or hot. To determine whether to operate the fluid supply system 100 in the cooling mode, the temperature sensor 52 detects the T_C temperature of the fluid, such as water, as it passes through the second main fluid line 22 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid proximate to a corresponding dispensing location 12 received from the second main fluid line 22 detects a dispensing location temperature T_W associated with the corresponding dispensing location 12, and the temperature sensors 52 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 72 of second control box 46, containing real time temperature data.

The control system 44 performs a comparison between the detected dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_C temperature, to determine a mode of operation for the fluid supply system 100 as to the water passing through the second main fluid line 22, such as performed by the controller/processor 62 of the control system 44.

In the event that it is determined that the detected dispensing location temperature T_W is greater than or substantially greater than that of the T_DESIRED temperature or temperature range, i.e., the fluid is too warm flowing through the cold second main fluid line 22, the cooling mode in FIG. 5C is indicated and can be commenced. In the cooling mode, in an embodiment of the fluid supply system 100 in FIG. 5C, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the valve systems 110, 120 and 130, to selectively open or close these valve systems and control valves for operation in the cooling mode.

As indicated by the arrows in FIG. 5C, in the cooling mode, the relatively hot fluid that is at the dispensing location temperature T_W at its detected location(s) that is greater than the T_DESIRED temperature or temperature range flows from the fluid source, such as from the tank 14, through the second main fluid line 22 and is recirculated back through the common thermal rejection return fluid line 27, through the first main fluid line 21 in a reverse direction to a normal flow direction and through the first thermal rejection fluid line 24 and the central thermal rejection return fluid line 25, back to the fluid source, such as to the tank 14. As such, fluid is sent along the second main fluid line 22 and recirculated along the first thermal rejection fluid line 24 and the central thermal rejection return fluid line 25.

In the cooling mode of FIG. 5C, the cold second main fluid line 22 and first thermal rejection fluid line 24 recirculate the fluid back to the fluid source, such as to the tank 14, and during the recirculation, the corresponding dispensing location temperature T_W is detected by the at least one corresponding dispensing temperature sensor 54, as discussed. The fluid is recirculated until the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, such as at a desired temperature within +/− of 5 degrees Centigrade (C) of the T_DESIRED temperature, for example.

If so, when the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in the temperature range of the corresponding T_DESIRED temperature, the user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve systems 110, 120 and 130 under control of the control system 44, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 5A.

In the cooling mode of operation of the fluid supply system 100, the control system 44 controls the valve system 110 to close the first part 21a of the first main fluid line 21 and open the first thermal rejection fluid line 24, sending the fluid to circulate through the second main fluid line 22 and back through the first thermal rejection fluid line 24 and the central thermal rejection return fluid line 25, to be cooled down at the fluid source, such as at the tank 14. As shown in the FIG. 5C, in the cooling mode, the fluid travels along the second main fluid line 22 and reaches the valve system 120, in an open condition, enabling fluid flow through the first and second parts 22a and 22b of the second main fluid line 22, but the valve system 120 is in a closed condition to prohibit fluid flow through the second thermal rejection fluid line 26.

The valve system 130 is in an open condition to enable fluid to flow through the common thermal rejection return fluid line 27 recirculating the fluid from the second main fluid line 22 along the second part 21b of the first main fluid line 21 and along the first thermal rejection fluid line 24. The valve system 110 is open for fluid to flow back through the first thermal rejection fluid line 24 and the valve system 110 is closed to the first part 21a of the first main fluid line 21, preventing fluid from flowing further back into the first main fluid line 21. As such, the fluid travels along the first thermal rejection fluid line 24 and the central thermal rejection return fluid line 25, and back to the fluid source, such as to the tank 14.

In the cooling mode, the fluid source, such as the tank 14, can use the fluid cooling system 15 to chill the fluid to further cool the fluid. The fluid is recirculated in the above described flow path in the cooling mode until the at least one corresponding dispensing temperature sensor 54 proximate to a corresponding dispensing location 12 detects that the T_W temperature is at, substantially is at or is in or substantially falls in the temperature range of the corresponding T_DESIRED temperature.

If so, at this point, the control system 44 closes the valve system 130 to prohibit flow through the common thermal rejection return fluid line 27, operates the valve system 110 to close the first thermal rejection fluid line 24 and to open the valve system 110 for fluid flow through both the first part 21a and the second part 21b of the first main fluid line 21, operates the valve system 120 for the second thermal rejection fluid line 26 to remain closed and to continue fluid flow through both the first part 22a and the second part 22b of the second main fluid line 22, to switch the flow of fluid of the fluid supply system 100 back to a normal flow in the normal mode of operation, as illustrated in FIG. 5A.

As illustrated in FIGS. 6A-6B, the fluid supply system 200 including the valve system having the first, second and third valve systems 110, 120 and 130, such as can include three-way valves, solenoid valves or other types of suitable control valves, operates similar to that of the aforementioned embodiment of the fluid supply system 100 of FIGS. 5A-5C, in the normal mode, the warming mode and the cooling mode, and the fluid supply system 200 can include similar components and elements, as discussed in relation to operation of the fluid supply system 100 of FIGS. 5A-5C.

However, in an embodiment of the fluid supply system 200, the fluid supply system 200 can use a tank-less system, such as receiving fluid provided from a fluid source 13 associated with a fluid source line to provide fluid to the fluid supply system 200. Further, instead of warming, or heating, and cooling the fluid at the tank, it is contemplated that the system 200 includes a heater/cooler 19, such as can include a separate heater and/or a separate cooler, or can include a combination thereof, for selectively warming, or heating, and cooling fluid, to permit operation of the system 200 in generally warmer climates, which can require the fluid to be cooled, and for operation in colder climates, which can require the fluid to be warmed. As shown the heater/cooler 19 can be provided along the first main fluid line 21, such as along the first part 21a and the second part 21b of the first main fluid line 21.

As stated, the fluid supply system 200 operates to selectively control fluid flow in the fluid supply system 200 through the valve systems 110, 120 and 130. In the fluid supply system 200, fluid flow is controlled by the control system 44 and can be based on the detected T_W, T_H and T_C temperatures at the temperature sensors 50, 52 and 54, similar to that discussed in relation to the fluid supply system 100 of FIGS. 5A-5C, for example.

FIG. 6A illustrates normal fluid flow through the fluid supply system 200 in the normal mode of operation, with the arrows in FIG. 6A indicating a direction of fluid flow in the normal mode. In the event that it is determined that the dispensing location temperature T_w is at or substantially is at or is in or substantially falls in a temperature range of the T_DESIRED temperature for the warm, or hot, fluid, such as warm, or hot, water, or it is determined that the dispensing location temperature T_W is at or substantially is at or is in or substantially falls in a temperature range of the T_DESIRED temperature for the cold fluid, such as cold water, the fluid supply system 200 is determined to be in the normal mode. In the normal mode, signals are sent from the control system 44 to the first and second control boxes 45 and 46 and to the valve systems 110, 120 and 130, to selectively open or close the valves for operation in the normal mode. In the normal mode, fluid flows from the respective first and second main fluid lines 21 and 22 to the at least one corresponding dispensing location 12.

Also, in the fluid supply system 200, the valve system 110 selectively enables or prohibits flow through the first part 21a and the second part 21b of the first main fluid line 21, the valve system 120 selectively enables or prohibits flow through the first part 22a and the second part 22b of the second main fluid line 22, and the third valve system 130 selectively enables or prohibits flow through the common thermal rejection return fluid line 27.

As indicated by the arrows in FIG. 6A, in the normal mode, the relatively warm fluid, such as warm water, flows from the fluid source 13, through the first main fluid line 21, including its first and second parts 21a and 21b to the dispensing location 12, and the relatively cold fluid, such as cold water, flows through the second main fluid line 22, including its first and second parts 22a, and 22b to the dispensing location 12. In an embodiment of fluid supply system 200, in the normal mode, fluid flow does not occur through the first and second thermal rejection fluid lines 24 and 26 and does not occur through the common thermal rejection return fluid line 27.

Referring now to FIG. 6B, there is illustrated the fluid supply system 200 selectively operating in the warming mode or in the cooling mode, with the heater/cooler 19 selectively operating to warm the fluid in the warming mode and to cool the fluid in the cooling mode. To determine whether to operate the fluid supply system 200 in the warming mode, the temperature sensor 50 detects the T_H temperature of the fluid, such as water, as it passes through the first main fluid line 21 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature proximate to a corresponding dispensing location 12 of fluid received from the first main fluid line 21 detects a corresponding dispensing location temperature T_W associated with a corresponding dispensing location 12, and the sensors 50 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 70 of the first control box 45, containing real time temperature data.

The control system 44 performs a comparison between the detected dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_H temperature, to determine a mode of operation for the fluid supply system 200 as to the water passing through the first main fluid line 21, such as performed by the controller/processor 62 of the control system 44. The location of the one or more dispensing temperature sensors 54 in the fluid supply system 200 can be positioned at various locations near, or proximate to, and associated with the corresponding at least one dispensing location 12 to respectively detect a corresponding temperature of the fluid received from the first main fluid line 21 and the fluid received from the second main fluid line 22, other than as illustrated on the common thermal rejection return fluid line 27, as can depend on the use or application, and should not be construed in a limiting sense.

In the event that it is determined that the corresponding detected dispensing location temperature T_W is less than or substantially less than that of the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too cold flowing through the warm first main fluid line 21, the warming mode in FIG. 6B is indicated and can be commenced with the heater/cooler 19 selectively operating to warm the fluid. In the warming mode, illustrated in FIG. 6B, the control system 44 also sends a signal to the valve systems 110, 120 and 130 to operate in the warming mode. It should be noted that pump 16 is on only in the rejection mode, otherwise pump 16 is off.

As indicated by the arrows in FIG. 6B, in the warming mode, the warm fluid that is at the dispensing location temperature T_W less than the T_DESIRED temperature or temperature range flows from the fluid source 13, through the first main fluid line 21 and is recirculated back through the common thermal rejection return fluid line 27, through the second main fluid line 22 in a reverse direction to a normal flow direction and through the second thermal rejection fluid line 26 to the central thermal rejection return fluid line 25 and back to valve 110, then proceeding to line 21/21b. As shown the pump 16 is provided along the central thermal rejection return fluid line 25, to facilitate fluid flow of the rejected fluid back to the source 13. As such, the fluid is sent along the first main fluid line 21 through the common thermal rejection return fluid line 27 and recirculated back through the along the second thermal rejection fluid line 26 and the central thermal rejection return fluid line 25.

In the warming mode of FIG. 6B, the first valve system 110 is open to enable fluid to flow along the second part 21b of the first main fluid line 21, and is open to the first thermal rejection line 24. The fluid flows through the valve system 130 through the common thermal rejection return fluid line 27, and is circulated back to line 2b through the second part 22b of the second main fluid line 22 and through the second thermal rejection fluid line 26 to the pump 16. The fluid is recirculated and passed through the heater/cooler 19 until the corresponding dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a corresponding temperature range of the T_DESIRED temperature, such as at a desired temperature within +/− of 5 degrees Centigrade (C) of the T_DESIRED temperature, for example. It should be noted that in the configurations of both FIG. 6A and FIG. 6B, there is only one rejection line, beginning from valve 120, passing through line 26 and through pump 16, and passing to line 24, through valve 110, and into line 21b.

When the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, a user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve systems 110, 120 and 130, under control of the control system 44, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 6A.

In this regard, when the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, the control system 44 controls the valve system 120 to open flow of fluid to both the first part 22a and the second part 22b of the second main fluid line 22 and to close the flow of fluid to the second thermal rejection fluid line 26, and controls the valve system 130 to close fluid flow through the common thermal rejection return fluid line 27, controls the valve system 110 for the first thermal rejection fluid line 24 to remain closed and to continue fluid flow through both the first part 21a and the second part 21b of the first main fluid line 21, and fluid flows to the corresponding dispensing location 12, to resume normal operation in the normal mode of the fluid supply system 200, such as illustrated in FIG. 6A.

Similarly, to determine whether to operate the fluid supply system 200 in the cooling mode, the temperature sensor 52 detects the T_C temperature of the fluid, such as water, as it passes through the second main fluid line 22 at its location, and the at least one corresponding dispensing temperature sensor 54 positioned to detect a dispensing location temperature of fluid received from the second main fluid line 22 proximate to a corresponding dispensing location 12 detects a dispensing location temperature T_W associated with the corresponding dispensing location 12, and the temperature sensors 52 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 72 of the second control box 46, containing real time temperature data.

The control system 44 performs a comparison between the detected dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_C temperature, to determine a mode of operation for the fluid supply system 200 as to the water passing through the second main fluid line 22, such as performed by the controller/processor 62 of the control system 44.

In the event that it is determined that the detected dispensing location temperature T_W is greater than or substantially greater than the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too warm flowing through the second main fluid line 22, the cooling mode in FIG. 6B is indicated and can be commenced and the heater/cooler 19 selectively operating to cool the fluid. In the cooling mode, as also illustrated in FIG. 6B, the control system 44 sends a signal to the valve systems 110, 120 and 130 to operate the valve systems 110, 120 and 130 to provide a fluid flow as described above for FIG. 6B, but with the heater/cooler 19 selectively operating to cool the fluid.

When the dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, a user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve systems 110, 120 and 130, under control of the control system 44, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 6A.

Referring now to FIGS. 7A and 7B, the fluid supply system 300 operates similar to that of the aforementioned embodiment of the fluid supply system 100 of FIGS. 5A-5C, and fluid supply system 200 of FIGS. 6A and 6B, in the normal mode, the warming mode and the cooling mode, and the fluid supply system 300 can include similar components and elements, as discussed in relation to operation of the fluid supply system 100 of FIGS. 5A-5C or components similar to those of the fluid supply system 10 of FIGS. 1A-1C. However, in an embodiment of the fluid supply system 300, the fluid supply system 300 can use a tank-less system, such as receiving fluid provided from a fluid source 13a to the fluid source line 20 associated with the fluid supply system 300, to provide fluid to the fluid supply system 300.

Further, instead of warming, or heating, and cooling the fluid at the tank, it is contemplated that the system 300 includes the heater/cooler 19, such as can include a separate heater and/or a separate cooler, or can include a combination thereof, for selectively warming, or heating, and cooling fluid, and thereby permitting the system 300 to operate in generally warmer climates, which can require the fluid to be cooled, and operate in colder climates, which can require the fluid to be warmed. As shown, the heater/cooler 19 can be provided along the first main fluid line 21.

As stated, the fluid supply system 300 operates to selectively control fluid flow in the fluid supply system 300. Fluid flow is controlled by the control system 44 and can be based on the detected T_W, T_E and T_C temperatures at the temperature sensors 50, 52 and 54, similar to that discussed in relation to the fluid supply system 100 of FIGS. 5A-5C or the fluid supply system 10 of FIGS. 1A-1C, for example.

FIG. 7A illustrates normal fluid flow through the fluid supply system 300 in the normal mode of operation, with the arrows in FIG. 7A indicating a direction of fluid flow in the normal mode. In the normal mode, signals are sent from the control system 44 to selectively open or close the valves 33, 35 and 130 for operation in the normal mode.

As indicated by the arrows in FIG. 7A, in the normal mode, the relatively warm fluid, such as warm water, flows from the fluid source 13a, through the fluid source line 20 and through the first main fluid line 21, to the at least one corresponding dispensing location 12, and the relatively cold fluid, such as cold water, flows through the fluid source line 20 and through a second thermal rejection fluid line 26a and through the second main fluid line 22, which is in communicating relation with the second thermal rejection fluid line 26a, to the corresponding dispensing location 12.

As shown, the heater/cooler 19 provided on the first main fluid line 21 is adapted to selectively warm, or heat, and cool the fluid, as desired, as it passes along the first main fluid line 21. In the normal mode of operation of the fluid supply system 300, the control system 44 controls the valves 33, 35 and 130 such that the valve 33 is in the open position to receive fluid from the fluid source 13a through the fluid source line 20, the valve 35 is in a closed position to prohibit flow through a second common thermal rejection return fluid line 29, and the valve 130 associated with a first common thermal rejection return fluid line 27a is in the closed position to prohibit flow therethrough, for example.

Referring now to FIG. 7B, there is illustrated the fluid supply system 300 selectively operating in the warming mode or in the cooling mode, with the heater/cooler 19 operating to warm the fluid in the warming mode and to cool the fluid in the cooling mode. To determine whether to operate the fluid supply system 300 in the warming mode, the temperature sensor 50 detects the T_H temperature of the fluid, such as water, as it passes through the first main fluid line 21 at its location, and the at least one dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid proximate to a corresponding dispensing location 12 received from the first main fluid line 21 detects a corresponding dispensing location temperature T_W associated with the dispensing location 12, and the temperature sensors 50 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 70 of the unitary control box 47, containing real time temperature data.

The control system 44 performs a comparison between the detected dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_H temperature, to determine a mode of operation for the fluid supply system 300 as to the water passing through the first main fluid line 21 such as performed by the controller/processor 62 of the control system 44. As shown, it is contemplated that control boxes 45, 46, such as illustrated in FIGS. 1A-1C, 5A-5C and 6A-6B, can be combined into the unitary control box 47. The location of the one or more dispensing temperature sensors 54 in the fluid supply system 300 can be positioned at various locations near, or proximate to, and associated with corresponding dispensing location(s) 12 to respectively detect a corresponding dispensing location temperature of the fluid received from the first main fluid line 21 and the fluid received from the second main fluid line 22, other than as illustrated on the first common thermal rejection return fluid line 27a, as can depend on the use or application, and should not be construed in a limiting sense.

In the event that it is determined that the detected dispensing location temperature T_W is less than or substantially less than that of the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too cold flowing through the warm first main fluid line 21, the warming mode in FIG. 7B is indicated and can be commenced with the heater/cooler 19 selectively operating to warm the fluid. In the warming mode, illustrated in FIG. 7B, the control system 44 also sends a signal to the valves 35, 33 and 130 to operate in the warming mode.

As indicated by the arrows in FIG. 7B, in the warming mode, the warm fluid that is at the dispensing location temperature T_W less than the T_DESIRED temperature or temperature range that has flown from the fluid source 13a and through the first main fluid line 21 is recirculated back through the first common thermal rejection return fluid line 27a, through the second main fluid line 22 in a reverse direction to a normal flow direction, through the second thermal rejection fluid line 26a and through the second common thermal rejection return fluid line 29 and is recirculated back through the first main fluid line 21 and through the heater/cooler 19 to warm the fluid in the warming mode. As shown, the pump 16 is provided along the second common thermal rejection fluid line 29 to facilitate fluid flow of the rejected fluid back along the second main fluid line 22, through the second thermal rejection fluid line 26a and through the second common thermal rejection fluid line 29 and then recirculated back along the first main fluid line 21. In the warming mode, fluid flow from the fluid source 13a is blocked by the valve 33.

In the warming mode of FIG. 7B, the fluid flows through the valve 130 through the first common thermal rejection return fluid line 27a, through the second main fluid line 22 in a reverse direction to a normal flow direction and through the second thermal rejection fluid line 26a through the valve 35 to the pump 16 and through the second common rejection return fluid line 29 and is recirculated back through the first main fluid line 21 and through the heater/cooler 19 selectively operating to warm the fluid, and then back through the valve 130 and the first common thermal rejection return fluid line 27a and through the second main fluid line 22 and through the second thermal rejection fluid line 26a to the pump 16 and through the second common rejection return fluid line 29. The fluid is recirculated in the above described manner and passed through the heater/cooler 19, in a warming, or heating, mode to warm the fluid, until the corresponding dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a corresponding temperature range of the T_DESIRED temperature, such as at a desired temperature within +/− of 5 degrees Centigrade (C) of the T_DESIRED temperature, for example.

When the corresponding dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, a user of the fluid, such as at the dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve 33 can be selectively reopened and the valves 35 and 130 can be selectively reclosed, under control of the control system 44, to correspond to a normal operation in the normal mode, such as illustrated in FIG. 7A. In this regard, when the corresponding dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, the control system 44 controls the valve 33 to open flow of fluid from the fluid source 13a, and fluid flows to the at least one corresponding dispensing location 12, to resume normal operation in the normal mode of the fluid supply system 300, such as illustrated in FIG. 7A.

Similarly, to determine whether to operate the fluid supply system 300 in the cooling mode, the temperature sensor 52 detects the T_C temperature of the fluid, such as water, as it passes through the second main fluid line 22 at its location, and the at least one corresponding dispensing temperature sensor 54 positioned to detect a corresponding dispensing location temperature of fluid proximate to a corresponding dispensing location 12 received from the second main fluid line 22 detects a corresponding dispensing location temperature T_W associated with a corresponding dispensing location 12, and the temperature sensors 52 and 54 send corresponding signals of the detected temperature to the control system 44, such as from the controller 72 of the unitary control box 47, containing real time temperature data. The control system 44 performs a comparison between the detected corresponding dispensing location temperature T_W and the T_DESIRED temperature or temperature range, as can be based on the detected T_C temperature, to determine a mode of operation for the fluid supply system 300 as to the water passing through the second main fluid line 22, such as performed by the controller/processor 62 of the control system 44.

In the event that it is determined that the detected corresponding dispensing location temperature T_W is greater than or substantially greater than the corresponding T_DESIRED temperature or temperature range, i.e., the fluid is too warm flowing through the second main fluid line 22, the cooling mode in FIG. 7B is indicated and can be commenced and the heater/cooler 19 selectively operating to cool the fluid. In the cooling mode, as also illustrated in FIG. 7B, the control system 44 sends a signal to the valves 33, 35 and 130 to operate the valves 33, 35 and 130 to provide a fluid flow as described above for FIG. 7B, but with the heater/cooler 19 operating in a cooling mode to cool the fluid. When the corresponding dispensing location temperature T_W is at, substantially is at or is in or substantially falls in a temperature range of the corresponding T_DESIRED temperature, a user of the fluid, such as at the corresponding dispensing location 12, can be notified, such as by a message on the display 60 of the control system 44. Also, the valve systems 33, 35 and 130, under control of the control system 44, are selectively reopened or again closed to correspond to a normal operation in the normal mode, such as illustrated in FIG. 7A.

It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the following claims.

Claims

1. A fluid supply system to control a fluid temperature for fluid conservation, comprising:

a first main fluid line adapted to communicate with a fluid source of a fluid;

a second main fluid line adapted to communicate with the fluid source of the fluid;

a heater positioned in communication with the first main fluid line to warm the fluid flowing through the first main fluid line;

a first thermal rejection fluid line in communication with the first main fluid line to selectively recirculate the fluid from the second main fluid line flowing back in a reverse direction through the first main fluid line to the fluid source;

a second thermal rejection fluid line in communication with the second main fluid line to selectively recirculate the fluid from the first main fluid line flowing back in a reverse direction through the second main fluid line to the fluid source;

a first temperature sensor associated with the first main fluid line to detect a temperature of the fluid flowing through the first main fluid line;

a second temperature sensor associated with the second main fluid line to detect a temperature of the fluid flowing through the second main fluid line;

at least one dispensing temperature sensor adapted to be associated with a corresponding at least one dispensing location for a fluid adapted to detect a corresponding dispensing location temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line proximate to the corresponding dispensing location;

a valve system to selectively control a flow of the fluid in the fluid supply system; and

a control system including a controller to control the valve system to selectively direct the flow of the fluid through the first and second main fluid lines to a dispensing location or to selectively direct the flow of the fluid to recirculate the fluid in at least one of the first or second main fluid lines back to the fluid source based upon a detected dispensing location temperature of a corresponding at least one dispensing temperature sensor,

wherein the first temperature sensor detects the temperature of the fluid at a location in the first main fluid line and the second temperature sensor detects the temperature of the fluid at a location in the second main fluid line, and the at least one dispensing temperature sensor detects a corresponding dispensing location temperature of fluid flowing through at least one of the first main fluid line or the second main fluid line, the detected temperatures being provided to the control system, the control system comparing the at least one detected dispensing location temperature from at least one corresponding dispensing temperature sensor to a corresponding preselected desired temperature or to a corresponding preselected desired temperature range, the corresponding preselected desired temperature or the corresponding preselected desired temperature range based on the detected temperature of the fluid at the location in the first main fluid line or the detected temperature of the fluid at the location in the second main fluid line,

wherein, when the control system determines the at least one detected dispensing location temperature is substantially at the corresponding preselected desired temperature or substantially in the corresponding preselected desired temperature range, the control system controls the valve system to flow the fluid from at least one of the first or second main fluid lines to the dispensing location, and

wherein, when the control system determines the at least one detected dispensing location temperature is other than substantially at the corresponding preselected desired temperature or is other than substantially within the corresponding preselected desired temperature range, the control system controls the valve system to recirculate the fluid from the first main fluid line or the second main fluid line corresponding to the detected dispensing location temperature back along the other of the first main fluid line and the first thermal rejection fluid line or the second main fluid line and the second thermal rejection fluid line until the corresponding at least one detected dispensing location temperature is substantially at the corresponding preselected desired temperature or is substantially in the corresponding preselected desired temperature range.

2. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, wherein the valve system comprises:

a first control valve in communication with the first main fluid line;

a second control valve in communication with the second main fluid line;

a third control valve in communication with the first thermal rejection fluid line; and

a fourth control valve in communication with the second thermal rejection fluid line,

wherein, when the corresponding at least one detected dispensing location temperature is substantially at the corresponding preselected desired temperature or is substantially in the corresponding preselected desired temperature range, the fluid supply system operates in a normal mode, and the control system selectively opens the first and second control valves and closes the third and fourth control valves to flow the fluid from the fluid source through at least one of the first and second main fluid lines to the dispensing location,

wherein, when the corresponding at least one detected dispensing location temperature is substantially greater than the corresponding preselected desired temperature or is substantially greater than the corresponding preselected desired temperature range, the fluid supply system operates in a cooling mode, and the control system selectively opens the second and third control valves and closes the first and fourth control valves to flow the fluid from the fluid source through the second main fluid line to recirculate the fluid back through a part of the first main fluid line through the first thermal rejection fluid line to the fluid source to cool the fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or is substantially in the corresponding preselected desired temperature range to operate the fluid supply system in the normal mode, and

wherein, when the corresponding detected dispensing location temperature is substantially less than the corresponding preselected desired temperature or is substantially less than the corresponding preselected desired temperature range, the fluid supply system operates in a warming mode, and the control system selectively opens the first and fourth control valves and closes the second and third control valves to flow the fluid from the fluid source through the first main fluid line to recirculate the fluid back through a part of the second main fluid line through the second thermal rejection fluid line to the fluid source to warm the fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or is substantially in the corresponding preselected desired temperature range to operate the fluid supply system in the normal mode.

3. The fluid supply system to control a fluid temperature for fluid conservation according to claim 2, further comprising:

a common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line to selectively recirculate the fluid back from one of the first main fluid line or the second main fluid line to the other of the first main fluid line or the second main fluid line when the fluid supply system operates in other than the normal mode; and

a central thermal rejection return fluid line in communication with the first thermal rejection fluid line and second thermal rejection fluid line to return fluid to the fluid source.

4. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line to selectively recirculate the fluid back from one of the first main fluid line or the second main fluid line to the other of the first main fluid line or the second main fluid line when the fluid supply system operates in other than the normal mode; and

a central thermal rejection return fluid line in communication with the first thermal rejection fluid line and second thermal rejection fluid line to return fluid to the fluid source.

5. The fluid supply system to control a fluid temperature for fluid conservation according to claim 4, wherein the fluid comprises water.

6. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, wherein the fluid comprises water.

7. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line to selectively recirculate the fluid back from one of the first main fluid line or the second main fluid line to the other of the first main fluid line or the second main fluid line.

8. The fluid supply system to control a fluid temperature for fluid conservation according to claim 7, wherein the fluid comprises water.

9. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a pump in association with the first main fluid line and the second main fluid line to move the fluid from the fluid source through the fluid supply system.

10. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a recirculation pump associated with at least one dispensing location to recirculate the fluid back through at least one of the first main fluid line or the second main fluid line back to the fluid source based upon a corresponding detected dispensing location temperature detected by a corresponding at least one dispensing temperature sensor located proximate to a corresponding dispensing location.

11. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a plurality of mixing fluid outlets associated with at least one dispensing location to provide a mixing stage to distribute the fluid from the corresponding dispensing location at one or more preselected temperatures; and

a thermal rejection line associated with a corresponding at least one dispensing location to recirculate the fluid back through at least one of the first main fluid line or the second main fluid line based upon a dispensing location temperature detected by at least one corresponding dispensing temperature sensor located at a corresponding dispensing location,

wherein the thermal rejection line recirculates the fluid back through at least one of the first main fluid line or the second main fluid line to adjust the temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line until the corresponding dispensing location temperature of the fluid is substantially at a corresponding preselected desired temperature or substantially falls in a corresponding preselected desired temperature range to substantially provide a corresponding temperature or temperature range of the fluid in one or more of the mixing fluid outlets.

12. The fluid supply system to control a fluid temperature for fluid conservation according to claim 1, further comprising:

a plurality of mixing fluid outlets associated with at least one dispensing location to provide a mixing stage to distribute the fluid from the corresponding dispensing location at one or more preselected temperatures,

wherein the fluid is distributed at different temperatures from the dispensing location.

13. The fluid supply system to control a fluid temperature for fluid conservation according to claim 12, wherein the fluid comprises water.

14. A fluid supply system to control a fluid temperature for fluid conservation, comprising:

a first main fluid line;

a second main fluid line;

at least one of a heater or a cooler, or a combination thereof, positioned along the first main fluid line, the heater to selectively warm a fluid flowing through the first main fluid line and the cooler to selectively cool the fluid flowing through the first main fluid line;

a common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line to selectively recirculate the fluid back through the second main fluid line when the fluid supply system operates in other than a normal mode;

a second thermal rejection fluid line in communication with the second main fluid line to recirculate the fluid back to a fluid source;

a central thermal rejection return fluid line in communication with the second thermal rejection fluid line to return fluid to the fluid source;

a valve system to selectively control a flow of the fluid in the fluid supply system;

at least one temperature sensor associated with at least one of the first main fluid line to detect a temperature of the fluid flowing through the first main fluid line or associated with the second main fluid line to detect a temperature of the fluid flowing through the second main fluid line;

at least one dispensing temperature sensor adapted to be associated with a corresponding at least one dispensing location for a fluid adapted to detect a corresponding dispensing location temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line proximate to the corresponding dispensing location; and

a control system including a controller to control the valve system to selectively direct the flow of the fluid through the first and second main fluid lines to a dispensing location or to selectively direct the flow of the fluid to recirculate the fluid through the second main fluid line and the second thermal rejection fluid line and back to the fluid source based upon a corresponding detected dispensing location temperature,

wherein the at least one dispensing temperature sensor detects a dispensing location temperature of the fluid at a corresponding dispensing location and sends the control system a corresponding detected dispensing location temperature which is compared to a corresponding preselected desired temperature or to a corresponding preselected desired temperature range, the corresponding preselected desired temperature or the corresponding preselected desired temperature range being based on a corresponding temperature detected by a corresponding at least one temperature sensor of the fluid flowing through the first main fluid line or through the second main fluid line,

wherein, when the corresponding detected dispensing location temperature is substantially greater than the corresponding preselected desired temperature or substantially greater than the corresponding preselected desired temperature range, the control system controls the valve system in a cooling mode to recirculate the fluid to flow through the common thermal rejection return fluid line, through a part of the second main fluid line through the second thermal rejection fluid line in communication with the second main fluid line to the central thermal rejection return fluid line to return fluid to the fluid source and recirculate the fluid from the fluid source back through the first main fluid line and the cooler to cool the recirculated fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or substantially falls in the corresponding preselected desired temperature range, and

wherein, when the corresponding detected dispensing location temperature is substantially less than the corresponding preselected desired temperature or substantially less than the corresponding preselected desired temperature range, the control system controls the valve system in a warming mode to recirculate the fluid to flow through the common thermal rejection return fluid line, through a part of the second main fluid line through the second thermal rejection fluid line in communication with the second main fluid line to the central thermal rejection return fluid line to return fluid to the fluid source and recirculate the fluid from the fluid source back through the first main fluid line and the heater to warm the recirculated fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or substantially falls in the corresponding preselected desired temperature range.

15. The fluid supply system to control a fluid temperature for fluid conservation according to claim 14, wherein the valve system comprises a plurality of valves including a first valve to selectively control flow of the fluid through the first main fluid line, a second valve to selectively control flow of the fluid through the second main fluid line and the second thermal rejection fluid line and a third valve to selectively control flow of the fluid through the common thermal rejection return fluid line.

16. The fluid supply system to control a fluid temperature for fluid conservation according to claim 14, wherein at least one dispensing location includes a motion sensor to detect the presence of a user such that upon detection of the user a fluid rejection determination process is initiated by the control system, the control system comparing a received corresponding detected dispensing location temperature of the fluid at a corresponding dispensing location with the corresponding preselected desired temperature or the corresponding preselected desired temperature range.

17. The fluid supply system to control a fluid temperature for fluid conservation according to claim 14, wherein the control system is activated by a user initiating activation manually on an interface located proximate to the dispensing location and, upon activation, a fluid rejection determination process is initiated by the control system, the control system comparing a received corresponding detected dispensing location temperature of the fluid at a corresponding dispensing location with the corresponding preselected desired temperature or the corresponding preselected desired temperature range.

18. A fluid supply system to control a fluid temperature for fluid conservation, comprising:

a first main fluid line;

a second main fluid line;

at least one of a heater or a cooler, or a combination thereof, positioned along the first main fluid line, the heater to selectively warm a fluid flowing through the first main fluid line and the cooler to selectively cool the fluid flowing through the first main fluid line;

a first common thermal rejection return fluid line in communication with the first main fluid line and the second main fluid line to selectively recirculate the fluid back through the second main fluid line when the fluid supply system operates in other than a normal mode;

a second thermal rejection fluid line in communication with the second main fluid line;

a second common thermal rejection return fluid line in communication with the second thermal rejection fluid line and the first main fluid line to recirculate fluid back through the first main fluid line when the fluid supply system operates in other than a normal mode;

a valve system to selectively control a flow of the fluid in the fluid supply system;

at least one temperature sensor associated with at least one of the first main fluid line to detect a temperature of the fluid flowing through the first main fluid line or associated with the second main fluid line to detect a temperature of the fluid flowing through the second main fluid line;

at least one dispensing temperature sensor adapted to be associated with a corresponding at least one dispensing location for a fluid adapted to detect a corresponding dispensing location temperature of the fluid flowing through at least one of the first main fluid line or the second main fluid line proximate to the corresponding dispensing location; and

a control system including a controller to control the valve system to selectively direct the flow of the fluid through a fluid source line from a fluid source and through the first and second main fluid lines to a dispensing location or to selectively direct the flow of the fluid to recirculate the fluid through the second main fluid line through the second thermal rejection fluid line, through second common thermal rejection return fluid line and back through the first main fluid line based upon a corresponding detected dispensing location temperature,

wherein the at least one dispensing temperature sensor detects a dispensing location temperature of the fluid at a corresponding dispensing location and sends the control system a corresponding detected dispensing location temperature which is compared to a corresponding preselected desired temperature or to a corresponding preselected desired temperature range, the corresponding preselected desired temperature or the corresponding preselected desired temperature range being based on a corresponding temperature detected by the at least one temperature sensor of the fluid flowing through the first main fluid line or through the second main fluid line,

wherein, when the corresponding detected dispensing location temperature is substantially greater than the corresponding preselected desired temperature or substantially greater than the corresponding preselected desired temperature range, the control system controls the valve system in a cooling mode to recirculate the fluid to flow through the first common thermal rejection return fluid line, through the second main fluid line, through the second thermal rejection fluid line in communication with the second main fluid line, through the second common thermal rejection return fluid line and recirculate the fluid back through the first main fluid line and the cooler to cool the recirculated fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or substantially falls in the corresponding preselected desired temperature range, and

wherein, when the corresponding detected dispensing location temperature is substantially less than the corresponding preselected desired temperature or substantially less than the corresponding preselected desired temperature range, the control system controls the valve system in a warming mode to recirculate the fluid to flow through the first common thermal rejection return fluid line, through the second main fluid line, through the second thermal rejection fluid line in communication with the second main fluid line, through the second common thermal rejection return fluid line and recirculate the fluid back through the first main fluid line and the heater to warm the recirculated fluid until the corresponding detected dispensing location temperature is substantially at the corresponding preselected desired temperature or substantially falls in the corresponding preselected desired temperature range.

19. The fluid supply system to control a fluid temperature for fluid conservation according to claim 18, wherein the fluid source is a tank-less fluid source.

20. The fluid supply system to control a fluid temperature for fluid conservation according to claim 18, wherein the fluid comprises water.