Abstract: An air conditioning apparatus includes a refrigerant circuit, a refrigerant heating unit and a stop signal controller. The refrigerant circuit includes a compressor, an indoor heat exchanger, a pressure reducing mechanism, and an outdoor heat exchanger. The refrigerant heating unit heats refrigerant flowing through the refrigerant circuit. The stop signal controller, in a case of causing the compressor to stop at a time when the compressor and the refrigerant heating unit are both operating, executes first stop control in which a stop signal is issued in order to stop the refrigerant heating unit, and then a stop signal is issued in order to stop the compressor after elapse of a first amount of time. A method of controlling an air conditioning apparatus having the refrigerant circuit and the refrigerant heating unit includes executing the first stop control.

Abstract: A hybrid heating apparatus heats potable water with waste heat from heat recovery units and insolation from solar collectors. A single circulation pump circulates fluid between at least one heat exchanger and each of the heat recovery units and preferably the solar collector. A single controller receives sensor readings from the heat recovery units and the solar collector units and receives a demand to heat the potable water. To satisfy the demand, the controller determines the extent to which the demand may be satisfied from heat available from the heat recovery units and the solar collector units and sends command signals both to the circulating pump to circulate the fluid and to appropriate ones of valves at connections to those heat recovery units and solar collector units to allow fluid to circulate to be heated to flow to the heat exchanger for effecting heat exchange to heat the potable water.

Abstract: A method of providing cooling by a cooling system to a computer data center. The method includes providing a plurality of air-and-water radiators and one or more chillers, the chillers each having a first side in fluid communication with a chilled water loop and a second side in communication with a condenser water loop. The method also includes circulating a first portion of return water coming from the computer data center to a first subset of the air-and-water radiators and through the condenser water loop, circulating a second portion of the return water from the computer data center to a second subset of the air-and-water radiators and through the chilled water loop, and circulating the first portion and the second portion of the return water to the computer data center as cooled supply water.

Abstract: An outdoor control unit includes a first control unit, a second control unit, and a switching unit. The outdoor control unit controls the rotational speed of an outdoor fan. The first control unit executes a first control for controlling the rotational speed of the outdoor fan based on the operation frequency of the compressor. The second control unit executes a second control for controlling the rotational speed of the outdoor fan based on a parameter other than the operation frequency of the compressor. The switching unit executes a switching control for switching between the first control and the second control according to a predetermined switching condition, when a cooling mode is being operated under a low outside air condition. The low outside air condition refers to a state that the outside air temperature is lower than a first temperature.

Abstract: A refrigerating cycle device that can reduce power consumption while cooling capacity or heating capacity is maintained is obtained.

Abstract: A chiller system includes a compressor operable at a compressor speed between a first speed and a second speed to deliver a flow of compressed fluid to a manifold at a compressor pressure and a condenser in fluid communication with the manifold to receive the compressed fluid. A condenser fan is operable at a fan speed between a minimum fan speed and a maximum fan speed to direct a cooling flow to the condenser to cool the compressed fluid and an evaporator is positioned to receive the flow of compressed fluid and operable to cool a second fluid. A controller is operable at least partially in response to a measured temperature of the second fluid and a measured temperature of the cooling flow to determine a desired pressure and to vary the compressor speed and the fan speed such that the compressor pressure equals the desired pressure.

Abstract: Between two heat exchangers of a first heat exchanger unit 41 and a second heat exchanger unit 42 included in an indoor heat exchanger 40, an opening 80 is arranged for introducing indoor air sucked from an air inlet 321 into an indoor blower 50 without being heat-exchanged. At the opening 80, a damper 91 is arranged for adjusting the opening rate of the opening 80, which is driven by a predetermined driving member 92. During a cooling cycle running of a freezing cycle, the opening rate of the opening 80 and/or the devices included in the freezing cycle such as a compressor, blower and expansion valve are controlled alone or in combination so that the temperature of the indoor heat exchanger 40 is lower than a dew point temperature of the indoor air.

Abstract: An air supply system and a method for controlling operation of an air supply system for supplying a conditioned air flow at a setpoint air temperature to a climate controlled space are disclosed.

Abstract: The present invention relates to a method for controlling a vehicle air-conditioner, which can prevent undershoot of an evaporator by performing a maximum capacity control or controlling an discharge capacity of a compressor through the outputting of an discharge capacity control value of the compressor directly before the stop of the air conditioner, and can improve the pleasant feelings of the passengers by preventing delay of response, which converges into the target temperature of the evaporator due to the delay of the decrease of the temperature of the evaporator.

Abstract: A method involves inspecting/testing a refrigeration system. One or more conduits or other components cooperate with the compressor, heat rejection heat exchanger, expansion device, and heat absorption heat exchanger to define a refrigerant flowpath. The inspecting/testing method comprises placing a plurality of collars over respective joints along the refrigerant flowpath. The collars each define a space that may be exposed to one or more sensors. Based upon input from the sensors, the presence or absence of leaks at the joints is determined.

Abstract: A vending machine system includes a control module for controlling a cooling system. The cooling system, which includes an evaporator, may omit a heating element for defrosting the evaporator. In operation, the control module cycles an evaporator fan in conjunction with a compressor based on a required set temperature to help keep products within a specified range. In an embodiment, the evaporator fan is turned on and off at substantially the same time as the compressor is turned on and off. In another embodiment, there is a predetermined delay after the compressor is turned on and off before the evaporator is respectively turned on and off. Other variations are contemplated.

Abstract: An air conditioning includes a refrigerant circuit and a blower fan. The refrigerant circuit has a compressor, a condenser, a first expansion valve, a second expansion valve, and an evaporator sequentially connected. The blower fan is arranged and configured to supply air as a heat source to the condenser. An air flow rate of the blower fan and an opening degree of the first expansion valve are controlled such that high pressure in a refrigeration cycle operation of the refrigerant circuit becomes a target high pressure.

Abstract: A method for defrosting an evaporator of a refrigeration sealed system, the system including at least one refrigeration compartment and a controller operatively coupled to a compressor, an evaporator, an evaporator fan and a condenser fan, wherein the method includes initiating a defrost cycle, operating the sealed system to prechill the refrigeration compartment, and selectively operating the evaporator fan and the condenser fan to raise a temperature of the evaporator.

Abstract: A transport refrigeration system has an engine driving an electric generator. A compressor is powered by the generator. At least one first electric fan is positioned to drive an airflow across a heat rejection heat exchanger. At least one second electric fan is positioned to drive an airflow across a heat absorption heat exchanger. A controller is coupled to the compressor and first and second fans. The controller is configured to: start the engine; engage the generator and at least one of the first fans before the engine has reached running speed; after the engine has reached running speed, start the compressor; and after starting the compressor, start at least one of the second fans.

Abstract: An HVAC system for a vehicle. The HVAC system includes a battery management controller, which can be used to run the components of the HVAC system when the engine of the vehicle is not running.

Abstract: A refrigerant vapor compression system using CO2 as the working fluid and operating in a transcritical cycle, compression of the refrigerant is accomplished by use of a digital scroll compressor adapted to a variable duty cycle in a pulse width modulation manner. The compression ratio is maintained at an acceptable level by selective control of various components within the system, depending on the mode of operation.

Abstract: A method for controlling the humidity inside a refrigerator, having at least a cavity and a refrigeration circuit including an evaporator and a compressor, comprising the step of measuring the relative humidity level inside the cavity, measuring the temperature of the evaporator and feeding the above measured values to a control algorithm capable of driving the refrigeration circuit in order to maintain substantially constant the average level of relative humidity and corresponding to a set value.

Abstract: The present invention relates to a control method of a refrigerator which operates a cooling cycle including two storage compartments, a compressor, a condenser, a valve, fans, and evaporators for cooling the respective storage compartments, with one of the fans (5) corresponding to the storage compartment for storing items at relatively low temperatures being activated for a set amount of time even after the compressor is deactivated at the completion of cooling of the storage compartment for storing items at relatively low temperatures.

Abstract: A temperature control system and a substrate processing apparatus are provided. The temperature control system for controlling temperatures of one or more members of a substrate processing apparatus includes a circulation system for circulating a first coolant to pass through the inside of each of the members, a heat exchanger for performing heat exchange between the first coolant of the circulation system and a second coolant, and a chiller for supplying the second coolant to the heat exchanger, wherein the circulation system includes a branch line for each of the members passing through the inside thereof, the branch line for each of the members is provided with a heating member for heating the first coolant supplied thereto, and the heat exchanger is installed in a room where the substrate processing apparatus is installed.

Abstract: An indoor unit of an air conditioner includes a cross flow fan and an indoor heat exchanger. The cross flow fan generates a flow of air. The heat exchanger has a two row part and a one row part. The one row part has an area that is smaller than the two row part, and is disposed so that it overlaps one part of the two row part in an air transit direction. Furthermore, during a cooling operation, a refrigerant flows to the two row part before flowing to the one row part.

Abstract: A method to detect and respond to a coil condition in an HVAC system. The method includes calculating an initial airflow restriction value and a current airflow restriction value, which are compared. If the current airflow restriction value is greater than a first sum including the initial airflow restriction value and a first restriction factor, then a coil condition is preliminarily determined to be freezing and cooling in the HVAC system is stopped.

Abstract: A controller area network based climate control system for a work machine, and a method of operation of the same, which advantageously and economically integrates into and utilizes the resources and capabilities of a CAN of a work machine, including, but not limited to, shared data from other systems of the machine, particularly engine data including engine operating speed and temperature, for controlling climate control system operation, as well as for troubleshooting and diagnosing problems.

Abstract: If the degree of opening of an electronic expansion valve (14) is kept below a specified degree of opening or if the degree of superheat of refrigerant at an evaporator (15) side is kept above a specified degree of superheat, the amount of circulating refrigerant is judged to be insufficient. Thus, the volume of an air delivered by an evaporator fan (22) is reduced.

Abstract: A refrigeration unit and diagnostic method therefore are provided. The refrigeration unit includes: a housing with an insulated cavity for storing food and beverages; a vapor cycle system operative to cool the food and beverages in the insulated cavity; a plurality of sensors in communication with the vapor cycle system and outputting data relative to the vapor cycle system; and a controller that, according to the data from the plurality of sensors, determines an occurrence of an event. Wherein the controller logs the data from the plurality of sensors to a data structure according to a first data-logging mode, and logs the data to the data structure according to a second data-logging mode upon occurrence of the event. In one embodiment the refrigeration unit may be a refrigeration line replaceable unit (LRU) configured for an aircraft galley.

Abstract: A thermal cycling system includes a structure defining a load space, a heating assembly positioned to heat to the load space, and a cooling assembly positioned to cool the load space. The cooling assembly includes a refrigeration circuit and a banking circuit. The refrigeration circuit has a compressor, a refrigeration condenser, a first refrigeration evaporator in direct thermal communication with the load space, a second refrigeration evaporator in parallel with the first evaporator, and primary refrigerant circulating throughout the refrigeration circuit. The banking circuit is gravity fed and includes a banking condenser, a banking evaporator positioned to cool the load space, and a banking refrigerant circulating throughout the banking circuit. The banking condenser includes a collection reservoir to store liquid banking refrigerant and is in thermal communication with the second refrigeration evaporator.

Abstract: A control device for a fan motor (7) which cools a condenser (6) of a vehicle air conditioner includes a temperature sensor (12) which detects a temperature of an air that has passed through an evaporator (10) of the vehicle air conditioner; and a controller (2). The controller (2) functioning to calculate a reference value (Ds) of an airflow generated by a rotation of the fan motor (7); calculate a correction value (DUP, DUPT) of the airflow on the basis of the detected air temperature (Tair); set a target airflow (TDR) on the basis of the reference value (Ds) and correction value (DUP, DUPT) of the airflow; and control the rotation of the fan motor to effect the target airflow (TDR).

Abstract: An air conditioning system for circulating a refrigerant includes a condenser having a vapor inlet for condensing the refrigerant into a high-pressure liquid having a first predetermined temperature. A heat exchanger including an exhaust channel directs air therethrough. The heat exchanger further includes a refrigerant inlet in fluid communication with a refrigerant outlet for receiving a high-pressure liquid and for delivering the high-pressure liquid therethrough. Furthermore, a heat mass exchanger outputs wet working air having a second predetermined temperature. The heat exchanger is in fluid communication with the heat mass exchanger for receiving the working air having a temperature less than the high-pressure liquid. The working air flows through the exhaust channel and over the high-pressure liquid to transfer heat from the high-pressure liquid to the working air for reducing the temperature of the high-pressure liquid.

Abstract: When a target blown air temperature TAO is in a predetermined intermediate temperature zone, a blower is automatically stopped (S80), an outside air mode is selected when the blower 8 is automatically stopped. When an outside air temperature Tam is a first predetermined temperature (15° C.) or lower, an opening degree of an air mix door is corrected to a high temperature side in comparison with the time of the operation of the blower (S120), and when the outside air temperature Tam is a second predetermined temperature (25° C.) or higher, the opening degree of the air mix door is corrected to the low temperature side in comparison with the time of the operation of the blower (S130).

Abstract: A secondary loop temperature control circuit for a temperature-controlled region in a compartment of a refrigerator is shown. The secondary loop temperature control circuit has a reservoir, configured to have a medium flow there through. A first heat exchanger is in flow communication with the reservoir and is configured to have the medium flow there through. The first heat exchanger is in thermal communication with the temperature-controlled region.

Abstract: A thermal dissipation apparatus includes a thermal transfer device including a heat pipe member. A temperature sensitive material is coupled to the heat pipe member and is operable to provide a visual indication of the heat transfer in the heat pipe member. The thermal dissipation apparatus may be coupled to a heat producing component in order to dissipate heat from the component, and the temperature sensitive material will allow the function of the heat pipe member to be visually determined.

Abstract: A method for the air conditioning of a vehicle interior as a function of incident solar radiation. In a vehicle with, for example, a four-zone air conditioning system, the incident solar radiation is detected by means of sensor elements assigned to the various air conditioning zones in the vehicle and is used for regulating the air conditioning capacity. In order to avoid faulty regulation due to a detected incident solar radiation which does not influence or only slightly influences the passengers because of perpendicular incident radiation, for example, on the roof, the hood and the trunk lid, the incident radiation direction is determined by means of the sensor elements and the regulation of the air conditioning capacity is adapted correspondingly, so that the situation of too intensive cooling, for example in the case of perpendicular radiation on the vehicle roof, is avoided.

Abstract: A system and method for controlling the temperature of industrial processing devices includes a central liquid supply having a supply section and a return section and at least one processing device temperature control subsystem in liquid transmission connection with the central liquid supply for generally maintaining the temperature and pressure of liquid being circulated around an industrial processing device at a designated liquid temperature set point which includes a variable-speed pump, control valve and control device which controls the temperature of the liquid in the subsystem by speeding up, slowing down or shutting off the pump to ensure that the subsystem liquid temperature remains approximately equal to the designated liquid temperature set point as determined by the processing device associated with the subsystem and opens or closes the control valve to add or release liquid from the subsystem to maintain the desired pressure within the system.

Abstract: A method for controlling operation of a refrigerator to enable independent cooling of a freezing chamber and a refrigerating chamber. The method prevents temperature rising of the refrigerator by controlling a refrigerant passage switching valve after stopping operation of a compressor, thereby reducing electricity consumption and increasing humidification effects of the refrigerator by controlling an operating time point of a refrigerating chamber fan.

Abstract: A refrigerator incorporates a variable speed refrigeration system including a variable speed compressor, a variable speed evaporator fan, a variable speed fresh food compartment stirring fan and a variable position damper. Various temperature sensors are provided to sense system parameters which are used by a controller to regulate each of the variable components in order to compensate for temperature changes within at least one refrigerator compartment in a highly effective, energy efficient and synergistic manner.

Abstract: Fan coil thermostats can provide energy savings by, for example, operating a fan coil system more efficiently. Fan coil systems employing such a fan coil thermostat may be more energy efficient. A fan coil system may include a fan coil that is configured for fluid communication with a source of heated fluid and/or a source of cooled fluid, a valve that controls fluid flow through the fan coil and a fan that blows air across the fan coil. The fan coil thermostat may include a controller that implements a control algorithm that calculates an error percentage value relating to a temperature difference between the current temperature and the temperature set point. The error percentage value may include a proportional term related to the temperature difference and an integral term related to the temperature difference. The controller may regulate the fan speed in accordance with the calculated error percentage.

Abstract: A cooling system for a heat producing system includes a heat exchanger in fluid communication with the heat producing system. The heat exchanger is configured to receive a temperature control fluid therethrough. A first fan is operable in a first rotational direction to move air through the heat exchanger in a first direction. A second fan is disposed radially adjacent to the first fan, and is operable in a second rotational direction opposite the first rotational direction to move air through the heat exchanger in the first direction. A control system, including at least one controller, is provided for controlling operation of the fans.

Abstract: A house air conditioning system that operates with outside air. The air conditioning system closes the house and uses air conditioning, when the outside temperature is lower than the inside house air temperature the air conditioning system is turned off, the house or building is opened to the outside and the cooler outside air is drawn through the house using fans. In the morning, before sunrise, the fans will draw outside cool air in from the outside to cool the thermal mass of the house and then closes the house as the outside air heats to trap the cool air within the house to delay air conditioning operation and reduce the overall amount of AC runtime energy required to cool the house. This system can also operate in reverse to heat the home. The system uses multiple sensors and control mechanism to ensure optimal energy savings.

Abstract: A heating and cooling system for a multi-level space is provided that comprises at least one lower level return air duct and at least one upper level return air duct, and a thermostat for controlling the operation of the heating or cooling system through either a low voltage cooling activation signal or a low voltage heating activation signal.

Abstract: A method for improving efficiency in heating and cooling systems which includes the steps of providing speed and pressure monitoring devices for monitoring and measuring the operational speed (OS) and the head (HR) of the fan or pump and providing a flow rate monitoring device for monitoring and measuring the fluid flow rate (Q) for fluid flowing through the fan or pump. The OS, HR and Q for the fan or pump would be periodically obtained from the speed and pressure monitoring devices and the flow rate monitoring device, and the operating S-value of the heating and cooling system would be determined by applying the formula S-value=HR/(QR)2, thereby obtaining a measurable single value representative of the overall efficiency of the heating and cooling system.

Abstract: The present invention concerns a method for pre-cooling the passenger compartment of an automotive vehicle. The vehicle includes at least one electrically actuatable window and a HVAC system having at least a controller, a blower, a passenger compartment temperature sensor, and a HVAC ducting leading to the passenger compartment. The controller and the blower are connected to a vehicle battery. The method includes determining the passenger compartment temperature and comparing the temperature to a first predetermined value; cycling an blower inlet to an outside air intake position and operating the blower to provide pressurized air to the passenger compartment if the passenger compartment temperature is greater than the first predetermined value; opening the vehicle windows; comparing the passenger compartment temperature to a second predetermined value; and stopping operation of the blower when the passenger compartment temperature drops below the second predetermined value.

Abstract: An air-conditioning system includes a refrigeration cycle and a control unit. The refrigeration cycle includes an electric compressor in which a compression mechanism for drawing a refrigerant therein for compression is integrated with an electric motor for driving the compression mechanism, and a motor drive circuit for driving the motor is cooled using an intake refrigerant drawn into the compression mechanism. The control unit provides operational control to the motor drive circuit and the refrigeration cycle. When the temperature of the motor drive circuit has exceeded a predetermined temperature, the control unit varies a condition of supplying air to exchange heat with the refrigerant flowing through the refrigeration cycle to thereby reduce the temperature of the intake refrigerant.

Abstract: A cooling system for cooling a plurality of heat producing systems includes a heat exchanger having a plurality of cooling zones, each of which has a respective inlet and outlet for facilitating flow of a respective temperature control fluid therethrough. Each of the respective temperature control fluids facilitates temperature control of a respective heat producing system. A plurality of fans cool the temperature control fluids flowing through the heat exchanger, and a fan or fans are disposed proximate each zone of the heat exchanger to provide air flow substantially independently from the air flow over the other cooling zones.

Abstract: An air-treatment system includes a cooling circuit, a first heat exchanger in thermal communication with the cooling circuit, and a secondary circuit in thermal communication with the first heat exchanger. The air-treatment system also includes a controller in communication with at least one of the cooling circuit, the first heat exchanger, and the secondary circuit. The controller is operable to receive at least one input indicative of a desired ambient condition, operable to receive at least one input indicative of current ambient conditions, operable to receive at least one input indicative of at least one of the cooling circuit operation and secondary circuit operation, and operable to change the operation of at least one of the cooling circuit and the secondary circuit when the current ambient condition is outside of a desired operation condition range.

Abstract: A method and system for efficiently managing indoor air through cooperation between a mobile device and a stationary air conditioner. The system may include at least one stationary air conditioner and at least one mobile assistant device that move with a predetermined management area and cooperates with the air conditioner. The air conditioner may include an air quality improving unit improving a value of a predetermined air quality index into an appropriate range, a first forced flow unit generating a main flow to transport improved air toward the abnormal region, and a control unit controlling the air quality improving unit and the first forced flow unit to perform a main operation on the abnormal region and transmitting a command instructing the assistant device to perform an assistant operation on the abnormal region to the assistant device.

Abstract: The present invention is directed towards a method of forming a ventilated seat. More specifically, in one aspect, the present invention is directed towards providing an insert in fluid communications with an air mover and a seating surface, wherein the system optionally includes a thermoelectric device for providing heating or cooling of air flowing through the insert.

Abstract: Temperature regulation by means of a PID regulation method can be associated with disadvantageous oscillations, overshooting and long control times. According to an exemplary embodiment of the present invention, during temperature regulation of a space, non-linear fuzzy logic is provided which for intelligent temperature regulation uses extensive information from the environment. Such information includes in particular the temperature in the air inlet duct upstream of the heater, and the rate of change in the temperature in the air inlet duct upstream of the heater and in a first cell of the space. In this way, a fast and precise temperature regulating system may be provided which largely prevents or suppresses undesirable oscillations.

Abstract: Air conditioning system controls are optimized for an air conditioning system having a compressor in IC engine vehicles and in hybrid or fuel cell vehicles having electric drive motors by first determining the operating temperature of at least one of the following vehicle components: engine coolant and transmission oil for all types of vehicles, and for hybrid or fuel cell vehicles also determining the operating temperature of inverter coolant and the electric drive motors. At least one operating temperature is then compared to lower and upper temperature limits. If the operating temperature is outside of the temperature limits air conditioner heat load is reduced by at least one of the following steps: increasing cabin air recirculation, reducing cabin blower speed and reducing air conditioner compressor capacity.

Abstract: A refrigerant PTAC system, such as those commonly found in hotel rooms, can be selectively configured in a hardwire or wireless configuration with respect to its thermostat. The system is controlled in response to the better of two temperature sensors, which is determined based on the PTAC's configuration and the validity of the readings provided by the sensors. While the PTAC is controlled in response to a preferred temperature sensor, the alternate sensor may be monitored for diagnostics or other reasons. In the event that the preferred sensor fails to provide valid readings, the controller automatically switches to controlling the system in response to the alternate sensor. To minimize manufacturing costs and the variety of stocked parts, the PTAC's controller preferably includes two substantially identical transceivers.

Abstract: A system for detecting at least one environmental condition in a room. The system includes one or more detecting devices having a sensor configured to detect the at least one environmental condition and to display the detected at least one environmental condition. The system also includes one or more reader devices configured to image the one or more detecting devices and a controller configured to communicate with the one or more reader devices. The controller is operable to control the one or more reader devices and to receive the images from the one or more reader devices. In addition, the controller is configured to determine the at least one environmental condition based upon the images of the one or more detecting devices. The system further includes a memory accessible by the controller, and the controller is configured to store the at least one environmental condition in the memory.

Abstract: There is provided an air conditioning system and method for operating an air conditioner according to a user's physical response to external conditions. The air conditioning system includes: an indoor environment sensing unit/a personal characteristic value reception unit for measuring an indoor environment and the user's physical status so as to obtain information used to operate an air conditioner; a control unit including at least a microprocessor, for finding out personal characteristic values which are used to evaluate the user's physical status on the basis of information inputted from the personal characteristic value reception unit; and a driving unit controlled by the control unit, for promptly enhancing the user's physical status.