ENVIRONMENTAL CONTROL SYSTEMS AND METHODS OF CONFIGURING ENVIRONMENTAL CONTROL SYSTEMS
An environmental control system of a building utilizes lower vents which open into lower portions of rooms of a building, and upper vents which open into upper portions of rooms of the building. When the system is operating in a heating mode, heated air is delivered into the upper portions of the rooms through the upper vents and air is removed from the rooms through the lower vents. When the system is operating in a cooling mode, cool air is delivered into the rooms through the lower vents, and air is removed from the rooms through the upper vents. Operating the heating and cooling modes in this fashion provides the most efficient operation of the heating and cooling system. A switching unit is used to selectively couple the inlet and outlet of an environmental control system to the upper and lower vents.
This application is a continuation of U.S. application Ser. No. 12/821,485, filed Jun. 23, 2010, which is itself a continuation-in-part of U.S. application Ser. No. 12/397,645, filed Mar. 4, 2009, which itself claims priority to U.S. Provisional Application No. 61/136,634, filed Sep. 22, 2008. This application also claims priority to the filing dates of U.S. Provisional Application No. 61/219,579, filed Jun. 23, 2009, and Provisional Application 61/244,631, filed Sep. 22, 2009. The contents of all of the foregoing applications are hereby incorporated herein be reference.
FIELD OF THE TECHNOLOGYThe disclosed technology is related to heating and cooling systems used to heat and cool rooms of a building.
BACKGROUNDHeating and cooling systems for buildings typically include a heating unit which produces heated air and a cooling unit which produces cool air. The hot or cool air is then delivered into rooms of a building through ducts and vents which open into the rooms. In addition, it is common to include air return vents and ducts which return air from one or more rooms of a building back to the heating unit or cooling unit. Thus, air is circulated from the heating and cooling unit, into the rooms, and then back to the heating and cooling unit.
The placement of the vents which deliver heated or cooled air into a room, and the placement of return vents which pull air back out of a room can vary depending on the building design. It is common to place such vents in the walls of a room, in the floor of a room, or in the ceiling of a room.
In a heating and cooling system embodying the invention, at least two vents are provided within a room of a building. An upper vent is positioned at an upper portion of the room, and a lower vent is positioned in a lower portion of the room. As shown in
The heating and cooling unit could take numerous different forms. It could be a traditional gas or electric furnace, paired with a traditional air conditioning unit. In other instances, it could be a heat pump. In other instances, it could take other forms. Regardless of the actual form of the device, it would be capable of delivering both heated air for heating rooms of a building, and cooled air for cooling rooms of a building. While certain sections of the following description refer to a heating and cooling unit, this term is meant to refer to any device or devices capable of delivering heated and/or cooled air.
The switching unit 200 would be connected to a first duct 302 which is connected to the upper vents that open into upper portions of the rooms of a building. The switching unit would also be connected to a lower duct 304 which is connected to lower vents 305a, 305b, 305c, 305d which open into lower portions of the rooms of a building 300.
A first input/output (I/O) port 212 is provided on a rear face of the switching unit. In addition, a second I/O port 214 is also provided on the rear face of the switching unit. Note, the first I/O port 212 is located on the upper right side of the rear face of the switching unit, and the second I/O port 214 is provided on the lower left side of the rear face of the switching unit.
A rectangular switching plate 230 is rotatably mounted inside the switching unit 200. In the embodiment shown in
When the switching plate 230 is located in the horizontal position, as shown in
When the switching plate 230 is rotated to the vertical position, as shown in
The ability to change how the input port 204 and output port 202 of the switching unit are coupled to the two I/O ports 212, 214 makes it possible to change how heated and cooled air is delivered to and removed from the rooms of a building. This capability also makes it possible to increase the efficiency of a typical heating and cooling system of a building.
If the switching unit shown in
When the system is operating in the heating mode, as illustrated in
In addition, air would also be simultaneously removed through the lower vents 305a, 305b, 305c, 305d of the rooms of the building. The air removed from the rooms would be communicated through the lower duct 304 which is attached to the second I/O port 214 of the switching unit 200 shown in
At the same time, air would be removed from the rooms of the building through the upper vents 303a, 303b, 303c, 303d. The air removed from the upper portions of the rooms would travel along the upper duct 302 to the first I/O port 212 of the switching unit 200. Because the switching plate 230 is oriented vertically, as shown in
When a heating and cooling system is configured as illustrated in
The coolest air within the rooms would be located in the lower portions of the rooms. As a result, when the heating and cooling system is operating in the heating mode, the coolest air within the rooms will be sucked into the lower vents and returned back to the heating and air conditioning unit so that it can be reheated. The flow pattern within the room would be from the top to the bottom of the room. And because the warmer air would normally be located at the upper portions of the room, this air flow pattern will help to better distribute the heated air down to the lower portions of the room.
Conversely, when the system is operating in the cooling mode, as shown in
It is believed by the inventor that operating the heating and cooling system in these two different heating and cooling modes will result in the most efficient heating and cooling of the rooms of the building. Operating in this fashion will also ensure that in the heating mode, heated air is redistributed to the coolest portions of the room in a more effective fashion, and in the cooling mode, cooled air will be redistributed to the warmest portions of the room in the most efficient fashion.
The actual locations of the upper and lower vents can vary from one installation to another. As shown in
In alternate instances, as shown in
The actual locations of the upper and lower vents is somewhat unimportant so long as the lower vents are located in a lower portion of a room, and the upper vents are located in an upper portion of a room.
In the switching unit illustrated in
Air entering the switching unit through the second I/O port 214 would be communicated to the output port 202. And if the second I/O port 214 were moved to one of the alternate locates 216a, 216b, 216c, 216d, the air entering the switching unit through any of these alternate locations would still be communicated to the output port 202.
Depending on where the switching unit is installed in a building, and depending upon the ducting arrangement required for the installation, it may be advantageous to attach the first and second I/O ports to one of the alternate locations on the switching unit. Likewise, it may be advantageous to move the input port and the output port to an alternate location. Moving the first and second I/O ports and/or the input port and output port to an alternate location might result in a small decrease in the efficiency of the switching unit, due to air flow losses. However, locating one of the I/O ports or the input port or output port at an alternate location may be necessary to accommodate the particular arrangement within the building.
In addition, in the embodiments shown in
Similarly, the embodiments shown in
As noted above, the rectangular or square switching plate 230 within the switching unit is rotatably mounted on two pivot points 232, 234. In some embodiments, the user might manually rotate the switching plate 203 between the horizontal and vertical orientations using a lever or knob attached to the switching plate in order to switch the system from the heating to the cooling mode, or vice versa. Some type of locking system could also be provided to lock the switching plate in either the horizontal or vertical position.
In other embodiments, a power device could be used to move the switching plate 230 between the horizontal and vertical orientations.
Note, in some embodiments, the switching plate 230 could be moved 90 degrees clockwise, and then 90 degrees counterclockwise to switch the switching plate 230 back and forth between the horizontal and vertical orientations. In other embodiments, the switching plate could simply be rotated clockwise 90 degrees at a time to move the switching plate between the vertical and horizontal orientations.
In alternate embodiments, a different type of powered switching means could be used to cause the switching plate to move between the vertical and horizontal orientations. The motor illustrated in
Moreover, the switching units illustrated in
The triangular-shaped switching unit includes an input port 402, and an output port 404. In addition, the triangular-shaped switching unit includes a first I/O port 412 and a second I/O port 414.
When the triangular-shaped switching plate 420 is oriented as shown in
When the switching plate 420 is rotated to the position shown in
As also illustrated in
Furthermore, as explained above, two input ports could be provided at locations 402 and 403, and two output ports could be located at positions 404 and 405. Likewise, two first I/O ports could be located at positions 412 and 413, and two second I/O ports could be located at positions 414 and 415.
When the core 502 of the switching unit is rotated 90 degrees, the upper and lower horizontal ducts 510, 520 would no longer be in registration with the upper duct 302, lower duct 304, or the ducts 102 and 104 passing to the heating and cooling unit 100. Instead, a first vertical duct 530 would connect the output duct 102 to the lower duct 304 passing to the building. Also, the second vertical duct 540 would connect the upper duct 302 from the building to the input duct 104 passing into the heating and cooling unit.
In the description provided above, it was assumed that the heating and cooling unit 100 would provide both heated air during a heating operation and cooled air during a cooling operation. In alternate embodiments, the heating and cooling unit 100 might only include a heater, or it might only include an air conditioning unit. For instance, if a building is located in a warm climate area, there would be no need for the building to include a heater. Instead, the building would only have an air conditioning unit. Likewise, if a building is located in a cool climate area, the building might only include a heater, and it would not have an air conditioning unit. Benefits of the above-described systems could also be obtained by buildings having only a heater or only an air conditioner.
If a building includes only a heater, the switching unit would be set into the heating mode when the heater is being operated to provide heated air into the rooms of the building. If, on a particular day, the outside temperature becomes unusually warm, it would be possible to set the switching unit into the cooling mode, and then run the system with just a fan to circulate air. Although the air provided into the rooms of the building would not be cooled by the heating and cooling unit 100, the air would still circulate. And the movement of cooler air at the bottom of each room towards the top of each room, resulting from the airflow caused when the switching unit is in the cooling mode, would still serve to better distribute the cool air in the rooms. Thus, some benefit would be provided by operating the system in the cooling mode, with just a fan running, even though no air conditioning unit is cooling the air passing through the heating and cooling unit 100.
Likewise, if a building only includes an air conditioning unit, the switching unit would be set into the cooling mode when the air conditioning unit is running. If a particular day is unusually cool, the switching unit could be switched to the heating mode, and the air could simply be circulated with a fan. Although no heater would heat the air passing through the heating and cooling unit 100, simply moving the air in the heating mode would serve to better distribute the warmer air at the tops of the rooms down towards the bottoms of each room. Thus, some benefit would be obtained from running the system in the heating mode with just a fan.
In view of the foregoing, the inventor believes that a system as described above can be beneficial even for buildings that have only a heater or only an air conditioning unit.
The switching unit includes two crossing ducts 602 and 604, both of which pass between the output duct 102 and the input duct 104 of the heating and cooling unit 100. Two movable damper flaps 612 and 618 are located at opposite ends of the first crossing duct 602. Likewise, two damper flaps 614 and 616 are located at opposite ends of the second crossing duct 604.
When the switching unit 200 is operating in the heating mode, as illustrated in
The switching unit 200 can be switched into a cooling mode, as illustrated in
When the embodiment illustrated in
When the system is operated in a cooling mode, the lower fan 704 would be activated. In addition, the cooling core 708 would cool air passing through the heating and cooling unit 700. As a result, cool air would be delivered to the lower portions of the rooms through the duct 304 connected to the lower portions of the rooms. Air removed from the upper portions of the rooms through the duct 302 would be delivered back into the upper portion of the heating and cooling unit 700. By providing two different fans 702 and 704, it is possible to reverse the flow direction of the air without the use of the separate switching unit.
The cylindrical housing 900 has an upper circular end cap and a lower circular end cap. Two apertures 902, 904 are formed on opposite sides of the upper end cap. Likewise, two apertures 912, 914 are formed on opposite sides of the lower end cap. Similar to the embodiments discussed above, ducts running to upper and lower vents in the rooms of a building would be attached to the apertures 912, 914 on the lower end cap, while ducts running to the inlet and outlet of the heating/cooling unit would be attached to the apertures 902, 904 of the upper end cap, or vice versa.
Although the switching unit illustrated in
Moreover, in this embodiment, the helical switching plate has a 90° twist from the top to the bottom of the cylindrical housing. In alternate embodiments, the helical switching plate could have more or less of a twist from the top to the bottom of the housing.
Further, although not shown in the drawings, a motor or other power operated device could be provided to cause the helical switching plate to move between the first and second positions. In other embodiments, a handle coupled to the helical switching plate might protrude through either the cylindrical sidewall or the upper or lower end cap to allow a user to manually move the helical switching plate between the first and second positions.
Also, because the housing is cylindrical, the helical switching plate could rotate 90° backwards and 90° forwards to switch between the first and second positions. Or, in alternate embodiments, the helical switching plate could rotate 90° forwards to switch from the first position to the second position, and then 270° forward to switch from the second position back to the first position. Thus, the helical switching plate could be configured to always rotate in the same direction.
Switching units as described above can also be used in environmental control systems that are used in large buildings, such as warehouses, large warehouse-style retail stores, or simply in large retail establishments. The basic arrangement of the elements of one such environmental control system is illustrated in
As shown in
The switching unit 1020 is also coupled to an lower air duct 1040 and an upper air duct 1030. The lower air duct 1040 leads to a plurality of lower vent units 1042 which are located in the lower portion of the building. The upper air duct 1030 leads to at least one upper vent unit 1032 located in an upper portion of the building. In the embodiment illustrated in
The switching unit 1020 allows the interconnections between the conditioned air duct 1012 and the return air duct 1014 on the one hand, and the lower air duct 1040 and the upper air duct 1030 on the other hand, to be switched. Thus, when the exchanger unit is in heating configuration, the conditioned air duct 1012 would be coupled to the upper air duct 1030, and the return air duct 1014 would be coupled to the lower air duct 1040. When the exchanger unit is in a cooling configuration, the conditioned air duct 1012 would be coupled to the lower air duct 1040, and the return air duct 1014 would be coupled to the upper air duct 1030.
In a traditional large building, the ducts leading to the outdoor unit are connected to the vents units inside the building the same way all year round. However, when heating a building, greater overall efficiency can be obtained when the ducts and vents are coupled to each other in a first way as opposed to a second way. And when cooling the building, greater overall efficiency can be obtained when the ducts and vents are reverse connected. Thus, the provision of the switching unit 1020 allows the interconnections between the ducts and vents to be switched to the maximum efficiency configuration at all times. This results in a greater year-round efficiency for the building.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims
1. A method of operating an environmental control system for a building that includes a heating and cooling unit having an inlet and an outlet and a switching unit that is connected between the inlet and outlet of the heating and cooling unit and first and second ducts leading to a room of the building, the switching unit comprising:
- a first passageway that has a first end coupled to the outlet of the heating and cooling unit and a second end coupled to the first duct;
- a second passageway that has a first end coupled to an inlet of the heating and cooling unit and a second end coupled to the second duct;
- a first cross-connection duct that is coupled between the first end of the first passageway and the second end of the second passageway;
- a second cross-connection duct that is coupled between the first end of the second passageway and the second end of the first passageway; and
- a plurality of dampers, wherein at least one damper is located at an end of each of the first and second cross-connection ducts, and wherein the dampers are movable between first positions at which they seal the ends of the first and second cross-connection ducts and second positions at which they block airflow through middle portions of the first and second passageways;
- wherein the method comprises:
- positioning the dampers in the first positions such that they seal the ends of the first and second cross-connection ducts when the heating and cooling unit is operating in a first of heating and cooling modes such that the outlet of the heating and cooling unit is coupled to the first duct and the inlet of the of the heating and cooling unit is coupled to the second duct, and such that air flowing through the first and second ducts is moving in opposite directions; and
- positioning the dampers in the second positions such that they block airflow through middle portions of the first and second passageways when the heating and cooling unit is operating in a second of heating and cooling modes such that the outlet of the heating and cooling unit is coupled to the second duct and the inlet of the of the heating and cooling unit is coupled to the first duct, and such that air flowing through the first and second ducts is moving in opposite directions.
2. The method of claim 1, wherein the first duct delivers or intakes air from an upper portion of the room of the building and the second duct delivers or intakes air from a lower portion of the room of the building, and wherein positioning the dampers in the first positions comprises positioning the dampers in the first positions when the heating and cooling unit is operating in a heating mode, and positioning the dampers in the second positions comprises positioning the dampers in the second positions when the heating and cooling unit is operating in a cooling mode.
Type: Application
Filed: Dec 18, 2014
Publication Date: Apr 16, 2015
Inventors: DOUGLAS A. NEWCOMER (NEW MARKET, MD), BRYAN LEVY (ANNAPOLIS, MD)
Application Number: 14/575,613
International Classification: F24F 11/00 (20060101); F24F 13/08 (20060101);