Abstract: In one embodiment, a cooling system is disclosed. The cooling system comprises: a cooling channel for receiving a cooling media, a substrate disposed near the cooling channel, and a fluidic jet disposed within the substrate and in fluid communication with the cooling channel. The cooling channel is for thermal communication with a component to be cooled. The cooling channel has a height of less than or equal to about 3 mm and a width of less than or equal to 2 mm. The fluidic jet comprises a cavity defined by a well and a membrane. In one embodiment, a method of cooling an electrical component comprises: passing a cooling media through a cooling channel, drawing the cooling media into one or more of the fluidic jets, expelling the cooling media from the one or more fluidic jets into the cooling channel, and removing thermal energy from the electrical component.

Abstract: A substrate treating apparatus includes a treating unit for treating substrates, a piping for supplying a treating liquid to the treating unit, a heater mounted on the piping, an electronic thermal unit mounted on the piping in series with the heater, a temperature sensor for measuring a temperature of the treating liquid, and a controller for controlling the heater and the electronic thermal unit. The controller sets a first temperature control mode for performing a room temperature control using the electronic thermal unit when the temperature measured by the temperature sensor is below a predetermined boundary temperature between room temperature and high temperature, and for performing a high temperature control with the heater when the temperature measured by the temperature sensor is above the predetermined boundary temperature between room temperature and high temperature.

Abstract: A heat pump type hot-water heater includes a hot-water tank, a heat pump cycle for heating hot water, a partition plate which divides an interior of the hot-water tank into an upper space and a lower space, a hot-water supply heat exchanger which exchanges heat of water with heat of hot water in the hot-water tank to produce high temperature hot water, a hot water supply pump which sends hot water in the hot-water tank to the hot-water supply heat exchanger, a heating terminal which heats a room, and a heating pump which sends hot water in the hot-water tank to the heating terminal.

Abstract: In an HVAC system in which ambient air is supplied by the system to a building through an ambient air intake airstream and is exhausted from the building through an exhaust airstream energy is conserved by transferring heat between the intake airstream and the exhaust airstream. A heat exchange fluid is circulated between heat exchangers located in the intake airstream and in the exhaust airstream. An air turbine is placed in the exhaust airstream for being driven by the exhaust airstream, and the air turbine is coupled with a pump arranged to circulate the heat exchange fluid between the heat exchangers such that upon being driven by the exhaust airstream, the air turbine, in turn, drives the pump to circulate the heat exchange fluid between the heat exchangers and thereby effects the transfer of heat from one to the other of the intake airstream and the exhaust airstream and a concomitant conservation of energy in the HVAC system.

Abstract: A cooling device includes a base having cells. A pipe is coupled to the base for each of the cells. The pipes include passages that carry fluid toward the cell and away from the cell. A magnetohydrodynamic pump system coupled to the pipe circulates an electrically conductive cooling fluid within the passages and the cell. An orifice may emits jets of fluid into the cells. A controller coupled to the cooling device may independently control flow rates in two or more cells of the cooling device. The controller may receive information from the temperature sensors on the base of the cooling device for use in controlling the flow rates in the cells.

Abstract: An expandable server housing having one or more server chassis stacked upon each other and one intake plenum and one exhaust plenum disposed on opposite sides of the stacked server chassis is disclosed. Each server chassis may have two or more fans predominately controlling airflow rate through a zone of the server chassis. Also, a method and system determining fan failure regardless of blockage of air path.

Abstract: The invention relates to a ventilation system for exchanging the air in a room with outside air, which system comprises: A fine wire heat exchanger having a first channel and a second channel, which channels are in heat-exchanging contact with each other, and wherein the first channel has an inlet connected to outside air and an outlet connected to the air in the room, and wherein the second channel has an inlet connected to the air in the room and an outlet connected to the outside air; balancing means for balancing the flow in both channels, such that the heat transfer is maximized. The invention also relates to a combination of a façade, a room on the inside of and adjacent to the façade and a ventilation system, wherein the inlet of the first channel of the system is connected to outside air on the outside of the façade and the outlet is connected to the air in the room, and wherein the inlet of the second channel is connected to the air in the room and the outlet is connected to the outside air.

Abstract: A method, system, and computer program product are provided for controlling liquid-cooled electronics, which includes measuring a first set point temperature, Ta, wherein the Ta is based on a dew point temperature, Tdp of a computer room. A second set point temperature, Tb, is measured, wherein the Tb is based on a facility chilled liquid inlet temperature, Tci, and a rack power, Prack, of an electronics rack. A Modular Cooling Unit (MCU) set point temperature, Tsp, is selected. The Tsp is the higher value of said Ta and said Tb. Responsive to the selected Tsp, a control valve is regulated. The control valve controls a flow of liquid that passes through a heat exchanger.

Abstract: A hot water feeder in which a solar heat collector is used. The feeder has a first heat exchanger for heating a heat medium by solar heat, a second heat exchanger for heating water in a hot-water tank by the heated heat medium, and a heat exchange volume determination unit. The heat exchange volume determination unit calculates the flow rate of the heat medium circulating between the first and second heat exchangers on the basis of the detected temperature of the heat medium fed to the first heat exchanger and the rotational speed of a heat medium circulation pump, and calculates the heat exchange volume on basis of the flow rate and the temperature difference between the detected temperatures.

Abstract: An environmental apparatus control system assures a consistent temperature control for realizing a comfortable residential environment based upon demands from the residents, yet in an energy-saving manner. The system includes an apparatus for controlling a residential space, and an initializer which provides an initial target value for control of the residential space at the start of operating the system. Comfortableness demands from residents are analyzed in order modify the initial target value to a working target value. The initial target value is shifted in a direction of saving the energy such that the working target value can always approach from and settle on the energy-saving side as the demands from the residents are analyzed. The working target values within a past time period are weighted to give a corrected target value which replaces the initial target value for the start of next operation cycle of the system.

Abstract: A vehicle cooling system comprises a vehicle unit, a heat exchanger, a cooling fan, a coolant pump, a three-way valve, and a control unit. The heat exchanger is arranged in the coolant route to selectively receive a coolant from the coolant outlet of the vehicle unit. The cooling fan is arranged to blow cooling air to the heat exchanger. The coolant pump is arranged to circulate the coolant through the coolant route. The three-way valve is arranged to switch the coolant route between a heat exchanger route that passes through the heat exchanger and a bypass route that bypasses the heat exchanger. The control unit is configured to control operation of at least one of the cooling fan, the three-way valve and the coolant pump based on a temperature of the coolant at the heat exchanger and a temperature of the coolant at the coolant outlet of the vehicle unit.

Abstract: A substrate treating apparatus includes a treating unit for treating substrates, a piping for supplying a treating liquid to the treating unit, a heater mounted on the piping, an electronic thermal unit mounted on the piping in series with the heater, a temperature sensor for measuring a temperature of the treating liquid, and a controller for controlling the heater and the electronic thermal unit. The controller sets a first temperature control mode for performing a room temperature control using the electronic thermal unit when the temperature measured by the temperature sensor is below a predetermined boundary temperature between room temperature and high temperature, and for performing a high temperature control with the heater when the temperature measured by the temperature sensor is above the predetermined boundary temperature between room temperature and high temperature.

Abstract: In a particular embodiment, a system to dissipate heat in an information handling system includes a first heat-generating component adapted to process first data and a second heat-generating component adapted to process second data. The system also includes a cooling fluid guide including an electroactive material. The cooling fluid guide is adapted to change from a first shape to a second shape, in response to receiving a trigger voltage or in response to no longer receiving the trigger voltage. The system also includes a controller adapted to detect a data load processed at the second heat-generating component and, in response to detecting the data load, to cause the trigger voltage to be received at, or no longer received at, the cooling fluid guide. The cooling fluid guide is adapted to direct an increased portion of cooling fluid toward the first heat-generating component when the cooling fluid guide is in a form of the second shape, as compared to the first shape.

Abstract: A system and a method for controlling a pump in a recirculating hot water system is provided. In one embodiment, the invention relates to a method for controlling a temperature of water in a recirculating hot water system including a storage tank for storing heated water, a recirculation conduit including a supply conduit for supplying the heated water to users via a plurality of outlets having a first outlet and a last outlet and a return conduit for returning an unused portion the heated water to the storage tank, a pump for circulating the heated water, the pump disposed along the return conduit, the method including measuring, at a point along the recirculation conduit, a temperature of the heated water provided from the storage tank, and controlling a speed of the pump, disposed along the return conduit, based on the measured temperature.

Abstract: Monitoring method and system are provided for dynamically determining flow rate of a first fluid and a second fluid through a heat exchanger. The method includes: pre-characterizing the heat exchanger to generate pre-characterized correlation data correlating effectiveness of the heat exchanger to various flow rates of the first and second fluids through the heat exchanger; sensing inlet and outlet temperatures of the first and second fluids through the heat exchanger, when operational; automatically determining flow rates of the first and second fluids through the heat exchanger using the sensed inlet and outlet temperatures of the first and second fluids and the pre-characterized correlation data; and outputting the determined flow rates of the first and second fluids. The automatically determining employs the determined effectiveness of the heat exchanger in interpolating from the pre-characterized correlation data the flow rates of the first and second fluids.

Abstract: A chiller unit including a chiller unit main body connected to a refrigeration cycle, a plate type heat exchanger unit that is secured to an upper stage portion of the chiller unit main body and divided into plural plate type heat exchangers, and a pipe group having a water medium pipe and a refrigerant pipe for supplying water medium and refrigerant to each of the plate type heat exchangers while branching the water medium and the refrigerant and collectively disposed at a lower stage portion of the chiller unit main body, wherein at least an exit side portion of the water medium pipe is routed substantially horizontally along the bottom portion of the chiller unit main body and a flow switch is provided in a horizontally-extending pipe portion of the water medium pipe.

Abstract: An information processing apparatus includes a device detecting section that detects a heating device provided in a housing; a device determining section that determines the type of the heating device detected by the device detecting section; a sensor selecting section that selects a predetermined one of a plurality of temperature sensors provided in the housing in accordance with existence/absence of the heating device and the type of the heating device; and a fan controlling section that controls the number of rotations of a cooling fan provided in the housing in accordance with a measured temperature of the temperature sensor selected by the sensor selecting section.

Abstract: Monitoring method and system are provided for dynamically determining airflow rate through and heat removal rate of an air-conditioning unit, such as a computer room air-conditioning unit. The method includes: sensing inlet and outlet temperatures of fluid passing through a heat exchanger associated with the air-conditioning unit; sensing air temperature at an air inlet side of the heat exchanger; automatically determining at least one of airflow rate through or heat removal rate of the air-conditioning unit, the automatically determining employing the sensed inlet temperature and outlet temperature of fluid passing through the heat exchanger, and the sensed air temperature at the air inlet side of the heat exchanger; and outputting the determined airflow rate through or heat removal rate of the air-conditioning unit. In one embodiment, the heat exchanger is an auxiliary air-to-air heat exchanger, and in another embodiment, the heat exchanger is the air-to-liquid heat exchanger of the air-conditioner.

Abstract: A cooling system for a construction machine, which can reduce noise of a cooling fan and can reliably produce cooling air at a required flow rate.

Abstract: In a cooling system for an electronic device of the present invention, server rooms in which a plurality of servers are placed, an evaporator which is provided close to each of the servers, and cools exhaust air from the server by vaporizing a refrigerant with heat generating from the server, a cooling tower which is provided at a place higher than the evaporator, cools the refrigerant by outside air and water sprinkling, and condenses the vaporized refrigerant, and a circulation line in which the refrigerant naturally circulates between the evaporator and the cooling tower. According to the cooling system, an electronic device which is required to perform a precise operation with a heat generation amount from itself being large, such as a computer and a server, can be efficiently cooled at low running cost.

Abstract: A ground source heat exchange system includes an upstream manifold and a downstream manifold. More than one heat exchange flow circuit can be connected to the upstream and downstream manifolds for burial in the ground. A control valve associated with each heat exchange flow circuit is mounted on at least one of the manifolds. Each control valve controls flow of heat exchange fluid through a respective heat exchange flow circuit.

Abstract: A hybrid air and liquid coolant conditioning unit is provided for facilitating cooling of electronics rack(s) of a data center. The unit includes a first heat exchange assembly, including a liquid-to-liquid heat exchanger, a system coolant loop and a facility coolant loop, and a second heat exchange assembly, including an air-to-liquid heat exchanger, an air-moving device, and the facility coolant loop. The system coolant loop provides cooled system coolant to the electronics rack(s), and expels heat in the liquid-to-liquid heat exchanger from the electronics rack(s) to the facility coolant. The air-to-liquid heat exchanger extracts heat from the air of the data center and expels the heat to the facility coolant of the facility coolant loop. The facility coolant loop provides chilled facility coolant in parallel to the liquid-to-liquid heat exchanger and the air-to-liquid heat exchanger. In one implementation, the hybrid coolant conditioning unit includes a vapor-compression heat exchange assembly.

Abstract: According to one embodiment, a cooling system for heat-generating structures comprises a cooling loop and a heat exchanger. The cooling loop directs a flow of a fluid coolant to both an active heat-generating structure and an inactive heat-generating structure. The fluid coolant receiving thermal energy from the active heat-generating structure and transfers thermal energy to the inactive heat-generating structure when a temperature of the fluid coolant is greater than an ambient temperature of an environment surrounding the heat-generating structures. The active heat-generating structure is operable to switch to an inactive state and the inactive heat-generating structure is operable to switch to an active state. The heat exchanger is in thermal communication with the first and second heat-generating structures and is operable to receive the fluid coolant at a first temperature and dispense of the fluid coolant out of the heat exchanger at a second temperature.

Abstract: A system and method is disclosed for cooling a control system in a vehicle. In one embodiment, the system comprises vehicle subsystems and a vehicle controller. The vehicle subsystems are configured to generate a plurality of subsystem temperature signals that are indicative of a measured temperature for each vehicle subsystem. The vehicle controller is configured to generate a desired fan speed signal for each vehicle subsystem in response to each subsystem temperature signal and to compare each desired fan speed signal to each other to determine a maximum desired fan speed signal. The vehicle controller controls the fan such that the fan reaches a fan speed that is equal to or greater than the maximum desired fan speed signal.

Abstract: The present invention relates to a method and arrangement of optimizing the level of anti freeze agent in a heat transfer fluid in a heat exchange system The method comprises determining (305) a wanted level of anti freeze agent at least partly based on the temperature of the media to which the heat exchange system will deliver heat, controlling (310) the current level of the anti freezing agent in the heat transfer fluid. Anti freezing agent is added 315:1 to the heat transfer fluid if the current level is a predetermined amount lower than the wanted Level, and removed 315:2 from the heat transfer fluid if the current level is a predetermined amount higher than the wanted level.

Abstract: A temperature controlled loadlock chamber for use in semiconductor processing is provided. The temperature controlled loadlock chamber may include one or more of an adjustable fluid pump, mass flow controller, one or more temperature sensors, and a controller. The adjustable fluid pump provides fluid having a predetermined temperature to a temperature-controlled plate. The mass flow controller provides gas flow into the chamber that may also aid in maintaining a desired temperature. Additionally, one or more temperature sensors may be combined with the adjustable fluid pump and/or the mass flow controller to provide feedback and to provide a greater control over the temperature. A controller may be added to control the adjustable fluid pump and the mass flow controller based upon temperature readings from the one or more temperature sensors.

Abstract: A device for testing heat conduction performance of a heat pipe is provided. In which the heat pipe to be tested includes an evaporating section and a condensing section. The device includes a block, a cooling device, a thermal interface material, a heating element for heating the block and a plurality of thermal probes. The block is coupled with the evaporating section of the heat pipe. The cooling device is coupled with the condensing section of the heat pipe. The thermal interface material is configured to be at a coupling interface between the block and the evaporating section of the heat pipe. The thermal probes are inserted into the block and the cooling device to measure the respective temperatures of distinct regions in the block and the cooling device where the thermal probes are located.

Abstract: Disclosed is a cooling system for cooling an enclosure. The system comprises a fluid inlet and a fluid outlet which are interconnected by a fluid pathway. A fluid mover is in fluid communication with the pathway and moves fluid along it. A programmed controller operates the fluid mover to direct fluid flow along the fluid pathway. The controller is programmed such that in response to a first fluid located outside the enclosure being detected at a first temperature that is equal to or less than a detected second temperature of a second fluid located inside the enclosure, the mover moves the first fluid into the enclosure thereby lowering the temperature inside the enclosure.

Abstract: The present invention relates to a battery cooling device for vehicles and a method for controlling the battery cooling device, which compactly includes battery heat exchanging means mounted on a battery to cooling the battery in a water cooling type, and a heat exchanger, air blowing means and cooling water circulating means connected with the battery heat exchanging means. Operations of the air blowing means and the cooling water circulating means are controlled in such a way as to compare battery temperature, cooling water temperature and inside air temperature of the vehicle with one another, whereby the battery cooling device can enhance efficiency of the battery by properly controlling the battery temperature, reduce power consumption and noise by properly operating the air blowing means and the cooling water circulating means, and satisfy necessary inside temperature conditions while cooling the battery using the inside air of the vehicle.

Abstract: Measurement circuit components are included in an integrated circuit fabricated on a semiconductor substrate. A method is provided for controlling the speed of a cooling fan provided to cool an integrated circuit in which includes the steps of receiving a voltage from a thermal diode, addressing a table of digital temperatures by incrementing the address of the table entries every clock cycle of a circuit clock, converting the addressed data to a second voltage representing temperature, comparing the first voltage to the second voltage, providing a resulting temperature when both the first and second voltages are equal, and adjusting the fan speed accordingly.

Abstract: A ground source heat exchange system includes an upstream manifold and a downstream manifold. More than one heat exchange flow circuit can be connected to the upstream and downstream manifolds for burial in the ground. A control valve associated with each heat exchange flow circuit is mounted on at least one of the manifolds. Each control valve controls flow of heat exchange fluid through a respective heat exchange flow circuit.

Abstract: A system for defrosting an air-to-air heat pump system is disclosed. A bypass loop transfers refrigerant at a higher temperature and pressure than is normally cycled through the outdoor unit to an outdoor coil to defrost ice on the outdoor coil. The bypass loop includes a valve movable between closed and open positions. A sensor monitors a preselected condition indicative of outdoor coil performance. A controller communicates with the valve and the sensor. Once the controller determines that a preselected set point of a preselected condition indicative of deteriorating performance has been reached, the controller sends a signal to open the valve, allowing warm refrigerant to bypass expansion valves and flow to the outdoor unit to defrost the outdoor unit. Once defrosting is accomplished, the valve can be moved to a closed position to resume normal operation of the heat pump unit.

Abstract: In an air conditioner for a vehicle having first and second air conditioning zones positioned at right and left sides of a front seat in a vehicle compartment and third and fourth air conditioning zones positioned at right and left sides of a rear seat in the vehicle compartment, the air conditioner includes calculating means for calculating each of target blowing-out temperatures of air blown out to the first to fourth air conditioning zones in accordance with environmental conditions and desirable temperatures of the first to fourth air conditioning zones. In the air conditioner, the calculating means corrects an influence from the other air conditioning zones by using a selected desirable temperature in the desirable temperatures of the first to fourth air conditioning zones, while calculating the individual target blowing-out temperatures of the first to fourth air conditioning zones.

Abstract: A vehicle HVAC control system including front and rear HVAC control systems for controlling a front HVAC system and a rear HVAC system, and a method for controlling the front and rear HVAC systems. A front set point temperature is used by the front HVAC control system to control operation of the front HVAC system. The front set point temperature is communicated to the rear HVAC control system. The rear HVAC control system derives a rear set point temperature, which is based upon the front set point temperature and a temperature adjustment value, to control operation of the rear HVAC system. The temperature adjustment value is one of a plurality of predetermined temperature adjustment values that may be selected by a rear seat passenger to adjust the rear set point temperature relative to the front set point temperature and thereby permit the rear set passengers to control the temperature of air delivered to the rear seat.

Abstract: A refrigerator has at least one chamber, a temperature adjuster adjusting a temperature inside the chamber, a first temperature sensor approximately sensing the temperature inside the chamber, a second temperature sensor spaced from the first temperature sensor so as to sense the real temperature inside the chamber, and a controller controlling the temperature adjuster according to the temperature sensed by the second temperature sensor when the temperature sensed by the first temperature sensor is within predetermined temperature limits of the chamber and the temperature sensed by the second temperature sensor is not. With this configuration, the temperature inside the chamber is effectively controlled by an accurate and prompt sensing operation. Though one of the first and second temperature sensors is abnormal, it is possible to replace or repair the abnormal temperature sensor, or to control the temperature adjuster by the other normal temperature sensor.

Abstract: A constant temperature refrigeration system for extensive temperature range application comprising a refrigerator, a low-temperature heat exchanger, a medium-temperature heat exchanger, a high-temperature heat exchanger, a pump, a first solenoid valve, a second solenoid valve, a third solenoid valve, a temperature sensor, a power regulator and a controller, the temperature sensor is utilized for determining the working fluid temperature and compare the actual input temperature, the actual output temperature and the predetermined temperature, and the controller is utilized for controlling the first solenoid valve, the second solenoid valve and the third solenoid valve for conveying the fluid to flow through various heat exchangers so that the working fluid is heated or cooled, with the result being that the working fluid temperature outputted is to reach the predetermined temperature, so as to acquire the working fluid having the exactly and precisely predetermined low temperature (?40° C. to 25° C.

Abstract: A brine supply unit for supplying brine to at least one load after controlling the brine so as to meet a target temperature of the load comprises: a heat exchanger disposed at a brine-cooling channel, through which the brine returned from the load flows, for cooling the brine with water for industrial use; a heater disposed at a brine-heating channel formed in parallel with the brine-cooling channel, through which the brine flows, for heating the brine; a mixing section disposed at a connecting portion between the brine-cooling channel and the brine-heating channel, for mixing the cooled brine and the heated brine; and a tank disposed between the mixing section and the load, which has a capacity of about 10 liters or more and is constructed so that the brine can pass therethrough slowly to relieve a sudden temperature change of the brine.

Abstract: In a vehicle air conditioner, a non-contact temperature sensor is used as an inside air temperature sensor for detecting a temperature in a passenger compartment. Based on infrared rays radiated from a predetermined area of the passenger compartment, the non-contact temperature sensor detects a surface temperature in the predetermined area in non-contact. Therefore, it is not necessary to blow air from the passenger compartment to the inside air temperature sensor in order to detect the temperature in the passenger compartment. Thus, energy consumption can be reduced while the temperature in the passenger compartment can be accurately detected. Accordingly, while the vehicle stops, the vehicle air conditioner can accurately determine whether air conditioning control by an air conditioning unit needs be started while energy consumption can be reduced.

Abstract: Methods and apparatus for controlling the temperature of a seat such as a vehicle seat are disclosed. The apparatus includes an electrical heater disposed in the seat, a cooling unit such as a cooling element and a fan, a detector for detecting the temperature associated with the electrical heater, and a controller for controlling the electrical heater and the cooler based upon the detected temperature and upon the humidity algorithm comprising a predetermined set of calculations of the humidity of air at different temperatures.

Abstract: A device to control an installation for heating, ventilating and/or ai-conditioning a vehicle passenger compartment responds to a set-point set by a passenger and chosen air-heating parameter values. A control module drives actuators to modify the operation of the installation. The device includes a module calculating a comfort temperature for a passenger in the passenger compartment using the stored values of the chosen parameters and by taking into account the set-point. The control module alters the operation of the installation as a function of the comfort temperature which corresponds to the air-heating configuration desired in the passenger compartment.

Abstract: A thermal treatment system for supplying thermally conditioned or purified water for human or animal consumption, industrial processes, environmental containment, or removal of foreign species. The water purifier includes a heat exchanger for exchanging heat between outgoing thermally conditioned or purified water and incoming makeup water; a water heater is connected to the heat exchanger so as to receive pre-heated incoming makeup water, where the water heater subsequently heats the incoming preheated makeup water to a set-point temperature in the case of thermally conditioned water and for purified water also holds the water for a period of time sufficient to inactivate selected organisms to a predetermined level. The heat exchanger has one or more treated water outlets for supplying thermally conditioned or purified water at selected temperatures.

Abstract: A rethermalization system for food trays having a hot food side and a cold food side, the system includes a first thermal system having a heating source, a refrigeration coil and a blower; a second thermal system having first and second refrigeration coils and a blower; and a control system operable in one mode to activate the refrigeration coil of the first thermal system and the first refrigeration coil of the second thermal system, and operable in a second mode to activate the heating source of the first thermal system and the first and second refrigeration coils of the second thermal system.

Abstract: Coolant systems, for power sources (e.g. internal combustion engines, fuel cells, and nuclear reactors) or microprocessors for example, are beneficially operated with coolant in a nucleate boiling state, but transitions to damaging film boiling are then possible. The disclosed coolant system includes a sensor, such as a thermocouple or thermistor, that provides a signal representative of fluctuations in the temperature at a heated surface. The signal also includes at least one parameter. A controller processes the signal to determine changes in the parameter of the signal and/or to determine the state of the coolant and can responsively change the coolant flow to avoid undesirable coolant states. For example, coolant flow can be changed by changing the output of a coolant pump. The controller can change coolant flow automatically, or a signal can be provided to an operator that an undesirable coolant state change is imminent or has occurred, thereby allowing operator intervention.

Abstract: A coolant circuit (10) includes at least one heat source (12), a radiator (14), and a bypass line (22), which connects a radiator inlet (18) to a radiator return (20) and whose junction (24) has a control valve (26) disposed on it, whose throttle body (58) can be electrically triggered as a function of operating parameters and environmental parameters by means of at least one control unit (40, 42) and divides the coolant flow between the radiator inlet (18) and the bypass line (22). According to a characteristic curve of the control valve (26), the control unit (40, 42) determines a set-point value (50) for the position of the throttle body (58), which sets a ratio of the radiator volume flow to the total coolant flow at the control valve (26).

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 heating/cooling control system that can effectively control the temperature of the air discharged at the rear interior of the motor vehicle. The heating/cooling control system includes a front control and a rear control. The front control is capable of operating within a predetermined temperature range. The temperature range of the rear control is determined by the set point of the front control.

Abstract: Disclosed is a refrigerator comprising at least one chamber and a temperature adjuster adjusting a temperature inside the chamber, further comprising a first temperature sensor approximately sensing the temperature inside the chamber, a second temperature sensor spaced from the first temperature sensor so as to sense the real temperature inside the chamber; and a controller controlling the temperature adjuster according to the temperature sensed by the second temperature sensor when the temperature sensed by the first temperature sensor is within predetermined temperature limits of the chamber and the temperature sensed by the second temperature sensor is not. With this configuration, the temperature inside the chamber is effectively controlled by an accurate and prompt sensing operation. Though one of the first and second temperature sensors is abnormal, it is possible to replace or repair the abnormal temperature sensor, or to control the temperature adjuster by the other normal temperature sensor.

Abstract: A bipartite cooling system comprises a first set of cooling equipment that provides for closed cooling air circulation inside a cabinet and a second set of cooling equipment that provides for open cooling air circulation inside the cabinet. For most of the year, cooling of the cabinet can be handled with the first set of cooling equipment, which consists of an air-to-air heat exchanger. For the short period of time that the heat exchanger alone cannot ensure sufficient cooling of the air inside the cabinet, the second set of cooling equipment provides through-flow air circulation. This is achieved by drawing air into the cabinet through a filter and blowing warmed-up air out.

Abstract: The absence or shortage of a heat transfer medium can be detected without any time lag. While the medium is circulated through a water jacket and an exhaust gas heat exchanger which receives heat from the exhaust gas, heat generated by the engine can be recovered. A first sensor is provided at a waste heat recovering location in a circulation path of the medium. A second sensor is provided at a downstream side of sensor. When the medium is absent, a difference in measured temperature develops between sensor and sensor. A heat transfer medium shortage signal is outputted when the difference in the measured temperature between the first sensor and the second sensor exceeds a predetermined reference level.

Abstract: A multiple zone electronic control system and method are provided to control a heating, ventilation and air conditioning (HVAC) system for a vehicle. The control system includes a plurality of sensors to provide inputs relating to multiple zones of an occupant compartment of the vehicle and a plurality of buttons to provide manual inputs relating to the multiple zones. The control system also includes a plurality of mechanisms to control temperature and flow of air from the HVAC system into the multiple zones. The control system further includes a controller electrically connected to the sensors and the buttons to receive the inputs therefrom and electrically connected to the mechanisms to control the temperature and flow of air into each of the multiple zones.