Abstract: Technologies for enhancing performance of a clutch that is installed in connection with a transport climate control system is provided. Enhancing performance of the clutch can be performed by establishing engagement cycling parameters for the clutch, cycling the clutch through a repetition of engagement and disengagement in accordance with the established engagement cycling parameters, and terminating the cycling upon achievement of at least one predetermined criterion.

Abstract: A hydraulic actuator includes a cylinder, a pump, an electric motor and a central block. The mechanism or the rotating parts of the pump are directly installed in an interior of the block, and the drive shaft of the pump is correspondingly mounted in walls or in covers of the block.

Abstract: A water cooling system includes a temperature control device which is connected with a first heat exchanger. A second heat exchanger includes a water temperature control path and a constant temperature water path. The water of the first heat exchanger is controlled by the temperature control device and flows to the water temperature control path. The water in the constant temperature water path tows through the second heat exchanger to proceed heat exchange with the water in the water temperature control path, and then flows to the target equipment. The temperature difference of the water flowing to the target equipment is smaller than that of conventional water cooling system.

Abstract: A circulating bath (10) including a heater (18) configured to heat a fluid (34) in a reservoir (22). The heater (18) is configured to be operatively connected to a source of power (50) by a control circuit (39) operatively coupled to the heater (18). First and second fluid level sensors (14) (16) are operatively coupled to the control circuit (39), and provide signals indicative of a low fluid condition in the reservoir (22). The control circuit (39) is configured to receive the signals from the fluid level sensors (14) (16), and disconnect the heater (18) from the source of power (50) in response to receiving a signal from either of the first and second fluid level sensors (14), (16) indicative of a low fluid condition.

Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system comprising: a temperature sensor (30) configured to measure a temperature of the fluid and generate a signal indicative of that temperature; a control signal generator (52) configured to, using control laws (78) and the first signal, generate a control signal for controlling the temperature of the fluid; a memory (56) for storing performance data; a transmitter (60) configured to transmit, from the aircraft environmental control system (4), the performance data; a receiver (60) configured to receive, responsive to transmitting the performance data, update information; and an update module (58) configured to, using the update information, update the control laws (78).

Abstract: Apparatus and methods are disclosed for a variable differential variable delay thermostat. The variable differential is based on the duration of a thermostat call for cooling or the duration of a thermostat call for heating. The variable cooling fan-off delay is based on cooling system parameters including but not limited to the duration of the cooling cycle, duration of the thermostat call for cooling, conditioned space temperature, temperature split, thermostat temperature rate of change, or thermostat temperature reaching a minimum inflection point or crossing a fixed or variable thermostat differential or differential offset.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for tracking computing enthalpy measurements indicating abnormalities associated with operation of a heating, ventilating, and cooling (HVAC) system. In some implementations, a computer-implemented method includes: obtaining, from one or more sensors associated with the HVAC system, (i) temperature data including a source vent temperature measurement and a return vent temperature of the HVAC system, and (ii) humidity data including a source vent humidity measurement and a return vent humidity measurement of the HVAC system; computing an enthalpy measurement associated with operation of the HVAC system; determining that the computed enthalpy measurement indicates an efficiency issue associated with operation of the HVAC system; and in response to determining that the computed enthalpy measurement indicates the efficiency issue associated with operation of the HVAC system, taking action related to the HVAC system.

Abstract: The invention relates to a test system for cooling and/or heating at least one test piece comprising a platform, at least one heating and/or cooling fluid providing means coupled to the platform, at least one position means for reproducibly fixing the relative position of the fluid providing means to the at least one test piece and wherein the at least one position means is connected to the platform, the platform comprising at least one fastening means, in particular two openings for releasable coupling the fluid providing means for an at least temporarily fixing of the relative position of the fluid proving means to the test piece. It also relates to a test method.

Abstract: A container with active temperature control is provided. The container has a body with a chamber that receives a liquid. A temperature control system housed in the portable body has one or more heating element in thermal communication with at least a portion of the chamber to heat the liquid. Control circuitry controls the operation of the one or more heating elements and one or more power storage elements to provide electrical energy to the one or more heating element and/or control circuitry. The control circuitry controls the one or more heating elements to add heat to the liquid in the receiving portion to maintain the temperature of the liquid at a predetermined temperature or increase the temperature of the liquid above said predetermined temperature. The container can have a cooling element (e.g., a phase change material) that can remove heat from the liquid poured into the chamber.

Abstract: An environmental conditioning assembly for use in mechanical testing at scales of microns or less. The assembly includes an enclosure housing with an environmental cavity therein. A sample stage is positioned within the environmental cavity and includes an option sample heater. The enclosure housing includes a cavity perimeter clustered around the sample stage, and the enclosure housing isolates the environmental cavity and the sample stage from an environment exterior to the enclosure housing. In an example, an expansion and contraction linkage maintains a sample on the sample stage at a static elevation according to heating or cooling fluctuations within the environmental cavity. A testing instrument access port extends through the enclosure housing into the environmental cavity.

Abstract: An HVAC system includes an HVAC unit having a cooling mode and a heating mode for conditioning the air in an inside space, and a programmable thermostat located remotely from the HVAC unit. The HVAC unit may have an onboard controller configured to control when the HVAC unit is in the cooling mode or heating mode, and whether the HVAC unit is activated or not. In some cases, the onboard controller of the HVAC unit may use a common temperature setpoint when controlling in the cooling mode and the heating mode. The programmable thermostat may have a programmable schedule with a plurality of time periods, where each time period has a heating setpoint and a cooling setpoint separated by a dead band. The onboard controller of the HVAC unit may be configured to accept input signals from the remotely located thermostat.

Abstract: Aspects include a method, system, and computer program product for determining a time to a threshold temperature of an electronic device in a data center. A method includes measuring parameters for an electronic device and the data center. A rate of change of temperature is determined for the device based on the parameters. The rate of change is compared to a rate of change threshold. It is determined that a cooling system is operating below a threshold when the rate of change is above the threshold. A first time is determined, where the first time is based the rate of change of temperature and a machine learning model. The first time and second time are compared, where the second time is a time to restore the cooling system to above the threshold. A signal is transmitted when the first time is less than the second time.

Abstract: A coolant distributor (10) includes a rigid connection unit (17) installed to be movable relative to the machine frame. An exchangeable distributor unit (18) can be connected to or disconnected from the connection unit (17) via a gripper device associated with the machine tool. The connection unit (17) has a connection face, on which at least one coolant supply channel opens. A distributor face on the distributor unit (18), where at least one distributor channel opens, contacts the connector face. The plane in which the connection face extends and the plane in which the distributor face extends are tilted from a connection direction (R) in which the distributor unit (18) moves to make and break the connection. A retaining force can be applied in the connection direction (R) by a locking device to retain the distributor unit in the connected position.

Abstract: An evaporator with a cool storage function includes a plurality of refrigerant flow tubes, fins, and cool storage material containers. Each of the cool storage material containers has a longitudinal direction and includes a third side wall and a fourth side wall opposite to the third side wall. The third side wall and the fourth side wall have first convex portions and second convex portions, respectively. The cool storage material containers are provided in a second part of spaces such that the first convex portions contact a first side wall of one of the plurality of refrigerant flow tubes and the second convex portions contact a second side wall of another of the plurality of refrigerant flow tubes. The third side wall and the fourth side wall have a concavo-convex shape in a cross-section perpendicular to the longitudinal direction.

Abstract: An HVAC controller may be programmed to control an HVAC system according to a comfort mode and an economy mode. When the HVAC system is operating according to the comfort mode, the HVAC system may primarily draw energy from a locally generated energy source or local energy storage system.

Abstract: A wide range of temperature control equipment for controlling a tested object to a predetermined temperature is provided. The wide range of temperature control equipment includes a thermal conducting plate, a temperature regulating module, a carrier plate, and a thermoelectric cooling module. The temperature regulating module is thermally connected to the thermal conducting plate for regulating the thermal conducting plate to a reference temperature. The carrier plate is used to accommodate the tested object. The thermoelectric cooling module is thermally connected between the thermal conducting plate and the carrier plate for controlling the tested object to the predetermined temperature via the carrier plate based on the reference temperature.

Abstract: Regarding an engine exhaust gas heat exchanger that allows exhaust gas to collide with a coolant passage through apertures, a configuration that can improve efficiency of heat exchange is provided. The engine exhaust gas heat exchanger 1 is provided with multiple stages of unit exhaust gas passages 3a, 3b, 3c that are configured with a first exhaust gas passage A in which a plane facing an inlet is blocked and that has a plurality of apertures 30 in a circumferential direction and in a flow direction, and a second exhaust gas passage B that has a dividing wall facing the apertures 30 and also serving as the coolant passage 20 and an outlet that also serves as an inlet of the first exhaust gas passage A of a next stage or an outlet 26 of the engine exhaust gas heat exchanger 1.

Abstract: A heating/cooling plate device for heating and/or cooling an object through a range of operating temperatures extending both above and below ambient. The device having a heating element to heat the plate, and a vapor compression refrigeration system through which refrigerant flows to cool the plate. Greater control of the heating and cooling of the plate is achieved by positioning the heater element substantially at the exit of an expansion valve of the evaporation compression system as this provides thermal energy to the refrigerant as it enters the evaporator.

Abstract: A hybrid heating and/or cooling system may combine different energy sources (e.g., solar and geothermal) into a single system. The hybrid heating and/or cooling system may include one or more heat pumps, a heat exchanger system, a solar and/or waste energy system, and a delivery system for delivering heat (and/or cool air) to a space such as a building. These systems may be interconnected and controlled using various conduits, pumps, valves and controls. The solar energy system may provide heat (e.g., low grade heat) to the working fluid at the input to the source side of the heat pump and/or may provide heat (e.g., high grade heat) to the delivery system for direct solar and/or waste energy heating.

Abstract: An inline duct supplemental heating and cooling device is mounted along an air duct that supplies a room of a building with supplemental warmer or cooler air to the room. The air duct also supplies the room with air from a main furnace and/or cooling unit associated with the building. A thermostat is used to set a desired temperature for the room, and a controller of the supplemental heating and cooling device is in communication with the thermostat, and activates an electric heater and/or fan as appropriate to warm or cool the room as needed. When the device is used to cool the room, the fan may be operated to draw cooled air through the duct from the main cooling unit and/or from other areas in the building that are linked via ductwork.

Abstract: A method of controlling a controllable device related to a building aperture, whereby a climate related characteristic for the aperture is adjusted by the device, and whereby the device is controlled in accordance with a climate and comfort program which is dependent on a control parameter, whereby the device is controlled in accordance with a time schedule provided by the climate and comfort program.

Abstract: A power supply test system includes a test chamber, a switch module, a temperature detecting unit, a control module, and a refrigerating and heating module. The test chamber accommodates a power supply. The switch module inputs a predetermined temperature value. The temperature detecting unit detects temperature signals in the test chamber. The control module receives the temperature signals. The refrigerating and heating module receives a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value. The refrigerating and heating module heats the test chamber. The refrigerating and heating module receives a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value. The refrigerating and heating module refrigerates the test chamber until the value of the temperature signal is equal to the predetermined temperature value.

Abstract: A power supply test system for testing reliability of a power supply includes a test chamber, a temperature detecting unit, a control unit, a heating module, and a refrigerating module. The test chamber accommodates the power supply. The temperature detecting unit detects temperature signals in the test chamber. The control unit presets a predetermined temperature value and receives the temperature signals. The heating module receives a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value. The heating module heats the test chamber. The refrigerating module receives a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value. The refrigerating module refrigerates the test chamber until the value of the temperature signal is equal to the predetermined temperature value.

Abstract: The invention provides for a controller such as a thermostat for an HVAC System comprising a housing having a circuit board and a display screen, the display screen having at least one alpha-numeric icon and a group of input control areas. A microprocessor is provided for control on the display screen. Buttons are pressed in order to program set-points of the thermostat so that seven days may be programed simultaneously. The display includes a seven-day icon so that the user can program the thermostat set-points rapidly (e.g. setting time and temperature settings with minimal steps). The user may activate a first programming mode wherein the activating occurs by depressing a programming-mode button for a first pre-selected duration in order to select a first day for setting the conditioning mode.

Abstract: A system and method are presented for managing the supply of energy to heating and cooling devices to reduce the thermal flux and overshoot in buildings having heating and cooling devices that are sized for extreme temperature demands, but which operate inefficiently for moderate conditions. The system interposes a control module between sensor devices and heating or cooling devices, to filter the signals from the sensor devices calling for heating or cooling according to one or more on/off routines. The control module defers the sending of signals activating or deactivating heating or cooling devices, thus allowing for moderating of ambient conditions between the initial demand from the sensor devices and the supply of heating or cooling by the heating or cooling devices.

Abstract: A method for controlling a controlled variable of a building zone to minimize an error between the controlled variable and a setpoint includes receiving an input at a first interface regarding the controlled variable from a sensor provided in the building. The method further includes using a processing circuit to determine a sign of the error based on the input and the setpoint. The method yet further includes using the processing circuit to cause a controller configured to affect the controlled variable to respond to the error at a first rate when a first sign of the error is present. The method further includes using the processing circuit to cause the controller to respond to the error at a second rate when a second sign of the error is present, the first rate being slower than the second rate. The first sign of the error can be associated with a high energy expenditure required to minimize the error relative to an energy expenditure required to minimize the error relative to the second sign.

Abstract: The present disclosure describes methods and apparatus for automatically changing between heating and cooling modes of an HVAC system, sometimes using a single or common set point in both modes. In an illustrative but not limiting example, an HVAC controller may monitor the temperature of an inside space of a building, and may switch the HVAC system to a cooling mode when the temperature of the inside space rises above a high switch-point temperature, and may cool the inside space to at least below the high switch-point temperature. The HVAC controller may also switch the HVAC system to the heating mode when the temperature of the inside space falls below a low switch-point temperature and may heat the inside space to at least above the low switch-point temperature. In some cases, after switching to the heating mode, the HVAC controller may cause the HVAC system to heat the inside space to substantially the set-point temperature.

Abstract: A cooling system and method for an outdoor electronics enclosure includes an air conditioner controlled to operate during off-peak hours, so as to pre-cool batteries. The cooled batteries keep the enclosure cool during peak hours so that it is not necessary to run the air conditioner when electricity prices are at their peak. A clock or light sensor determines the time of day. A controller has stored data indicating the peak hours when electricity costs more.

Abstract: A refrigerator having a main body including a refrigerating compartment, a cool air duct supplying cool air to the refrigerating compartment, and a sub storage compartment provided in the main body independently maintaining a temperature thereof with respect to the refrigerating compartment and being indirectly cooled or indirectly heated by radiation.

Abstract: It has been forecasted for its mounting at the vent of an air conditioning equipment (1), and comprises two independent ducts (2 and 3), one of them with its vent at the upper part of the enclosure and the other with its vent at the lower part of the same enclosure. At the intersection zone between the equipment (1) and the ducts (2 and 3), two couples of grilles (5 and 6) capacitated for occupying two positions are mounted, in order to establish the respective canalizations (10 and 11) for directing cold air or hot air (depending on whether the equipment 1 is producing cold air or producing heat) toward the upper part of the duct (2) or toward the lower part of the duct (3), respectively, establishing is both cases the cold air or hot air return at the lower part of one or other duct.

Abstract: A temperature control system for a building comprises a thermal collection system, a plurality of underground heat sinks, and a heat exchanger. The thermal collection system includes at least one fluid channel. The thermal collection system is configured to heat or cool fluid within the at least one fluid channel. A first and a second underground heat sink are configured to receive the fluid from the thermal collection system. The first underground heat sink absorbs heat from the fluid in order to heat the first underground heat sink. The second underground heat sink transfers heat to the fluid in order to cool the second underground heat sink. The heat exchanger is configured to receive fluid from the first or second underground heat sink in order to heat or cool the building.

Abstract: Provided is a biochemical analyzer including: a microfluidic device loading space including a microfluidic device supporting unit detachably supporting a microfluidic device including an electromagnetic radiation application region in which electromagnetic energy is applied; an energy source loading space including an energy source applying the electromagnetic energy to the electromagnetic radiation application region; and an isolation wall isolating the microfluidic device loading space and the energy source loading space to prevent heat transfer between the microfluidic device loading space and the energy source loading space and including a transparent window through which the electromagnetic energy can be transmitted. A method of controlling an internal temperature of the biochemical analyzer is also provided.

Abstract: A mounting structure is provided, for a sensor which is attached to a heat exchanger. An evaporator that is utilized in a vehicular air conditioning apparatus is equipped with a detection sensor, which is capable of detecting the surface temperature of the evaporator. In the detection sensor, a main body portion thereof on which the detector is provided is inserted between fins of the evaporator. After a cable is made to extend to a cable guide disposed on a side portion of a casing, the cable is retained by the cable guide.

Abstract: HVAC systems, zone control units, and control systems are provided. An HVAC system employs distributed zone control units that provides for localized air recirculation. A zone control unit can include a return air section that receives return air from serviced building zones and can mix the return air with a supply of outside air. The mixed air can be heated and/or cooled by the zone control unit and discharged to serviced building zones in a controlled manner. An exhaust air system can be used to extract air from serviced building zones. An HVAC zone control unit can include a local control unit with an Internet protocol address. The local control unit can include a memory and a processor for storing and executing a control program for the zone control unit. The control program can control of the zone control unit in response to commands received via the Internet.

Abstract: A thermostat may be placed in a heating mode when the sensed temperature is less than the lowest of the heating and cooling target temperatures by a first amount and may be placed in a cooling mode when the sensed temperature is greater than the highest of the heating and cooling target temperatures by a second amount. The presence or absence of a user may be monitored. If the thermostat is in a user absent mode, a cool setback amount may be added to the cooling target temperature and a heat setback amount may be subtracted from the heating target temperature to arrive at setback cooling and setback heating target temperatures, respectively. The thermostat may comprise a touch-sensitive screen having various display areas.

Abstract: A fluid heating system configured to regulate a temperature of a fluid within a fluid receptacle having a fluid reservoir includes a processing unit, at least one fluid temperature sensor in electrical communication with the processing unit, and a heating element in electrical communication with the processing unit. The at least one fluid temperature sensor is configured to detect a temperature of one or both of the fluid receptacle and/or fluid retained within the fluid receptacle. The processing unit selectively activates and deactivates the heating element to regulate the temperature of the fluid within the fluid receptacle.

Abstract: A heating and cooling system for 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.

Abstract: Disclosed is an automatic switching two pipe hydronic system for conditioning a space. In one embodiment the two pipe hydronic system enables automatic switching from a first mode of operation to a second mode of operation or vice versa in a reduced span of time. The present invention saves fuel, energy and water, when there are lower load conditions that affect boilers, chillers, and cooling towers. In another embodiment, the present invention provides a system for simultaneously heating and cooling a first portion and a second portion of a space by utilizing a plurality of boilers, chillers, heat exchangers, condenser pumps and closed loop pumps by using a plurality of sensors indicating the temperatures inside and outside the space and a controlling module controlling the operation of the system. The present invention can be easily achieved by making minor configurational modifications to existing systems thereby increases system versatility.

Abstract: A circulation conveyor for foods and drinks effectively controls internal temperature of a tunnel section covering an upper portion of a circulation-type conveyor path for foods and drinks. The conveyor has a tunnel section covering an upper portion of and in the longitudinal direction of the carrying path. A cooling and heating pipe 24 inside the tunnel section in its longitudinal direction controls internal temperature of the tunnel section. In the tunnel section, upper and lower ventilation openings 32 and 33, disposed above and below, respectively, of the cooling and heating pipe 24 are provided. The ventilation openings communicate via communication pipes 30a to 30c to circulate air, and an air blowing section 34 circulates air in the tunnel section by drawing air from one of the upper or lower ventilation openings, into the pipes, and discharges the air from the other opening.

Abstract: Various present invention devices enable adherence to requirements for medical items. A medical item of the present invention includes a monitoring or data recording device to monitor and/or record medical solution conditions. The device may further include indicators to indicate compliance of the medical solution with prescribed requirements (e.g., manufacturer, medical standard or regulation, etc.). The medical item may alternatively include a barcode or transponder to uniquely identify the medical item to a thermal treatment system measuring and storing conditions in a central database. The present invention further includes various thermal treatment systems that monitor medical items for prescribed requirements and display the monitored parameters to medical personnel. In addition, the present invention may place time stamp information on medical items to enable determination by medical personnel of compliance with prescribed requirements.

Abstract: A temperature control apparatus including a temperature control head kept in contact with an electronic device as a testing object thermally, an electric heater attached to the temperature control head, a refrigerant passage formed within the temperature control head so as to run through inside thereof, a compressor which compresses refrigerant coming out of the temperature control head, a temperature sensor which detects a temperature of refrigerant on an outlet side of the compressor, a condenser which condenses refrigerant coming out of the compressor, a returning portion which returns refrigerant condensed by the condenser to the temperature control head, and a control portion which bypasses the condensed refrigerant to the intake side of the compressor by a predetermined quantity corresponding to an output of the temperature sensor.

Abstract: A system for maintaining an IC-chip near a set-point temperature while electrical power dissipation in the IC-chip is varied includes a container having an open end with a seal ring. Located in the container is at least one nozzle for spraying liquid coolant droplets on a portion of an IC-module which holds the IC-chip. This spraying of the liquid coolant occurs while the seal ring is pressed against the IC-module. Also, a pressure reducing means is coupled to the container for producing a sub-atmospheric pressure in the space between the container and the IC-module while the seal ring is pressed against the IC-module.

Abstract: In one aspect, a food thawing cabinet includes at least one thawing chamber and one or more wall blowers and a heater for producing a controlled high volume of air flow over food product, with the heater controlled in a cyclic manner. In another aspect, various advanced control techniques for controlling heat input are provided in an effort to lower the time required to thaw frozen food products in a safe manner.

Abstract: Distributed control systems and methods. An embodiment of distributed control system may comprise at least first and second nodes operatively associated with one another, the first node issuing a signal to at least the second node in response to an event. A load controlled by the second node, and a distributed controller provided at the second node. The distributed controller executing at least one script corresponding to the signal to control the load.

Abstract: A system and method for structure heating, ventilation, and air conditioning (HVAC) that uses a heat exchanger to transfer heat between the structure and a subsurface storm water discharge chamber system is disclosed. Coils for heat management exchange are located in permanently collected runoff within a storm water management system beneath the frost line; the use of coils located within the retained runoff allows for improved heat exchange over coils placed within soil. Also described are a sensing device and feedback loop for HVAC control, to improve efficiency at ambient temperatures near the subsurface temperature.

Abstract: A method of operating a refrigerated oven to cook a food item therein comprises the steps of A) determining the temperature of the cooking chamber in the refrigerated oven, B) producing cooled air in the refrigeration unit of the refrigerator oven for a first period of time if the temperature of the cooking chamber is below a predetermined threshold temperature and delaying production of cooled air in the refrigeration unit if the temperature of the cooking chamber is not below the predetermined threshold temperature, C) circulating the cooled air through a refrigerated air path to the cooking chamber to prevent spoilage of the food item, and, D) heating the cooking chamber to cook the food item in the cooking chamber by cycling the heating element for a second time period.

Abstract: A method for controlling operation of a refrigerator having two evaporators is provided which allows food to be effectively stored in refrigerating and freezing chambers of the refrigerator. A Refrigerating-Freezing (RF) cycle and/or a Freezing (F) cycle of the refrigerator and compressor operation are controlled based on temperatures of various chambers within the refrigerator. This may be further enhanced by also controlling operation of the evaporators and their respective evaporator fans to further optimize cooling output and efficiency. In this manner, the various refrigerating and freezing chambers of the refrigerator can be maintained at an appropriate temperature, power consumption is minimized, and load on the compressor can be adequately managed so as to provide for effective food storage.

Abstract: A heating, ventilation and air conditioning (HVAC) device (104) which includes both heating and cooling operating modes provides an easy-to-use interface (110) for selecting the operating parameters of the device (104). The interface (110) allows the input of a setpoint temperature at which the HVAC device (104) conditions the ambient temperature of a space (102). A mode switch-over algorithm (200) uses the setpoint temperature, the sensed temperature from the conditioned space, and prestored threshold values that depend on the device's operating capacities, to determine when to change the device between heating and cooling modes. Also, within each of the respective modes, a heating (300) or cooling (400) algorithm controls the engaging and disengaging of the heating and cooling elements of the device (104) to maintain the temperature of the conditioned space (102) within a desired comfort zone.

Abstract: A refrigerator adapted for use in low ambient temperature conditions such as in an unheated garage or outdoors on a deck or patio. The refrigerator is provided with a low ambient heater to add heat to the refrigerated space when ambient temperatures outside the refrigerator are low enough that items stored in the refrigerator could freeze. The low ambient heater is controlled by an ambient thermostat located to sense temperatures outside the refrigerator. The low ambient heater and ambient thermostat are connected in the refrigerator control so that the ambient heater can not be energized when the cooling system is operating.

Abstract: A method of operating a cooling and heating circuit of a motor vehicle driven by an internal combustion engine includes providing a first cooling medium path through a bypass conduit, a second cooling medium path through a main cooler of the internal combustion engine, a third cooling medium path through a heating heat exchanger, subdividing the cooling medium paths by an electrically actuated valves and forming cooling medium flows by an electrically driven pump, controlling both the valves and the pump by an electronic control unit in dependence on operational and environmental parameters as well as nominal values, reversing a feeding direction of the electrically operated pump in a first operational phase of the internal combustion engine at low temperatures of the internal combustion engine and turned on first cooling medium path, and feeding the cooling medium by the pump in a lower region of the internal combustion engine.