Abstract: A method including determining whether an OFF criterion is satisfied for a lag compressor of a tandem set of scroll compressors. The tandem set of scroll compressors includes a lead compressor. The method further includes: initiating at least one process when the OFF criterion is satisfied; and maintaining the lag compressor in an ON state for a predetermined period subsequent to the OFF criterion being satisfied. The at least one process includes at least one of: operating the lead compressor at a maximum level; overriding a motor overload protection method, wherein the motor overload protection method protects motors of the lead compressor and the lag compressor; and overriding a proportional integral derivative (PID) method to reduce a speed of a condenser fan. The PID method controls the speed of the condenser fan.

Abstract: A method including: determining a cooling value; and comparing the cooling value to an activation point of a lead compressor. The lead compressor is in a tandem set of scroll compressors of a cooling system. The tandem set of compressors comprises a lag compressor. The method further includes: activating the lead compressor when the cooling value is greater than the activation point; activating the lag compressor subsequent to activating the lead compressor; and determining whether conditions exist including: an alarm associated with the lag compressor being generated, and the lead compressor being deactivated. The method further includes deactivating the lag compressor when at least one of the conditions exists in the cooling system.

Abstract: A method of controlling a refrigerated merchandiser. The method includes refrigerating a product display area of the merchandiser using a refrigerant, detecting a presence of an air-refrigerant mixture in the refrigerated merchandiser, activating a fan in response to detecting the presence of an air-refrigerant mixture, and at least partially evacuating an interior of the merchandiser in response to fan activation.

Abstract: A method of interacting with a refrigeration appliance using a portable electronic device, wherein the refrigeration appliance comprises a refrigeration system comprising one or more refrigeration components and a controller adapted to control the one or more refrigeration components and wherein the portable electronic device comprises an application for interacting with the controller of the refrigeration appliance. The method comprising the steps of positioning the portable electronic device in proximity to the refrigeration appliance, establishing a wireless communication connection between the refrigeration appliance and the portable electronic device, and displaying information on the portable electronic device corresponding to the refrigeration appliance to which the portable electronic device is connected.

Abstract: A refrigerator includes a refrigeration cycle system including a compressor, a condenser, an expansion device, and an evaporator through which a refrigerant sequentially passes; a blower fan sending air cooled by the evaporator to a freezer compartment and a refrigerator compartment; and a damper regulating air sent from the evaporator to the refrigerator compartment, in which when the freezer compartment temperature is not satisfactory and the refrigerator compartment temperature is not satisfactory, the refrigerator operates in a concurrent operation mode in which the compressor is operated, the damper is opened, and first voltage is applied to the blower fan, and when the freezer compartment temperature is not satisfactory and the refrigerator compartment temperature is satisfactory, the refrigerator operates in a freezer compartment single operation mode in which the compressor is operated, the damper is closed, and second voltage lower than the first voltage is applied to the blower fan.

Abstract: A climate controller device may be configured to perform operations including comparing an outside air temperature to a threshold temperature; selecting, based on the comparison, one of a function to determine target compressor off setpoint values for relatively lower temperatures and a function to determine target compressor off setpoint values for relatively higher temperatures; retrieving a value according to the selection function to determine target compressor off setpoint values, the value specifying a compressor off setpoint value corresponding to airflow configuration settings; and determining a target compressor off setpoint value based at least in part on the retrieved value.

Abstract: An evaporative cooling system for combustion gas turbine system has an array of cooling media including first and second cooling media types. The first cooling media type has a first maximum air velocity rating, and the second cooling media type has a second maximum air velocity rating that greater than the first maximum air velocity rating.

Abstract: A refrigeration system for a refrigerated merchandiser includes a refrigerated merchandiser disposed within an indoor environment, the refrigerated merchandiser including a case defining a product display area. The refrigeration system also includes a condenser coupled to the refrigerated merchandiser and disposed within the indoor environment, an evaporator coupled to the condenser and disposed within the indoor environment, a compressor coupled to the evaporator and disposed within the indoor environment, and a condenser fan assembly coupled to the condenser. The condenser fan assembly is disposed remote from the condenser in an ambient environment.

Abstract: A thermal storage heat pump system transfers heat to a passenger compartment of a vehicle from at least one of a thermal storage device and ambient air. Heat from the thermal storage device is absorbed by a first coolant flowing through it, and is transferred to a refrigerant via a first heat exchanger. The heat is then transferred from the refrigerant to a second coolant via a second heat exchanger, and then from the second coolant to air flowing into the passenger compartment via a heater core. Heat from ambient air is absorbed by the refrigerant via a third heat exchanger. The heat source is determined by at least one of the thermal storage device temperature, ambient air temperature, and ambient air humidity. At start-up of the vehicle, heat transfer to the refrigerant and to the second coolant is controlled based on low-side and high-side pressure measurements of the refrigerant.

Abstract: A defrost bypass dehumidifier includes an air flow path with first, second and third segments in series from upstream to downstream and passing ambient air respectively to an evaporator coil then to a condenser coil and then discharging same. The air flow path has a bypass segment passing ambient air to the evaporator coil in parallel with the noted first air flow path segment.

Abstract: A control system for operating a refrigerator appliance is provided. The refrigerator has a variable damper, a variable speed fan, and a variable speed compressor. The damper position, evaporator fan speed, and compressor speed are determined through interacting feedback control loops based on the set point temperatures for the fresh food and freezer compartments as well as the measured temperatures in such compartments. The adjustment of these actuators can eliminate large temperature fluctuations and discontinuities in the air flow and improve the thermal performance and energy efficiency of the refrigerator.

Abstract: A refrigeration control apparatus for a space includes a heat exchanger mounted in the space and having an inlet and an outlet for a cooling medium to be introduced into and exhausted from the heat exchanger; at least one fan assembly mounted in the space and operatively associated with the heat exchanger for moving an airflow over the heat exchanger; a sensor assembly mounted in the space for sensing a temperature of at least the space; and a controller having an electrical connection to the at least one fan and the sensor assembly to control operation of the fan responsive to the temperature of at least the space. A method is also provided for controlling the temperature of the space.

Abstract: A method for controlling blower speed of an air conditioning system in a vehicle having a start/stop engine. A stop event is entered and an ambient temperature and a second temperature (e.g., evaporator) of the air conditioning system are measured. A first cutback limit is determined in response to the ambient temperature. The blower speed is ramped to the first cutback limit The engine is restarted and the blower speed is restored in response to the second temperature reaching a restart threshold. Consequently, a rise in evaporator temperature is delayed so that any to request by the HVAC system to terminate the stop event is also delayed.

Abstract: A method controls a recirculation position of a return vent in an HVAC system for a vehicle with a compressor driven by a start/stop engine. A partial s recirculation position is set according to a basic recirculation strategy while the engine is operating. An auto stop event is entered at a time with the compressor operating. A full recirculation position is set during the stop event if a plurality of low fogging probability indicators are true. The low fogging probability indicators include a sensed ambient temperature being above a predetermined temperature, a sensed state of a windshield wiper being an off state, and a sensed sunload being above a predetermined sunload.

Abstract: A refrigerator having a dew prevention and/or control device and a method for preventing the formation of dew in and/or on the refrigerator includes a compressor adapted to compress a refrigerant, a condenser adapted to condense the refrigerant from the compressor, an evaporator adapted to cool air existing therearound by evaporating the refrigerant that passes through the condenser, a pipe between the condenser and the evaporator, configured to pass through the refrigerator body, humidity sensors and/or detectors configured to determine a humidity around the refrigerator, and a controller adapted to vary rotational speed of the fan in accordance with the humidity determined by the humidity sensors and/or detectors, thereby efficiently preventing the formation of dew on or in the refrigerator.

Abstract: A cooling system includes an air conditioner capable of cooling a predetermined space and changing an air volume or set temperature; one or more electronic devices disposed in the predetermined space and including a fan of variable rotational speed; a temperature sensor configured to detect temperature of the electronic devices; and a control apparatus configured to select, based on an increase in the detected temperature, whether to increase the air volume or decrease the set temperature of the air conditioner or to increase the rotational speed of the fan, with reference to air-conditioner information indicating a relationship between cooling performance and power consumption of the air conditioner and fan information indicating a relationship between cooling performance and power consumption of the fan.

Abstract: In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. A determination may be made whether a frost event and/or a nonfrost event has occurred based at least partially on the determined fan property.

Abstract: An air conditioning system for cooling an enclosure includes an air conditioner and a control system for triggering an economizer cycle of the air conditioner. The control system determines an electrical load of equipment in the enclosure, calculates a maximum acceptable outdoor temperature at which the economizer cycle may be operated based at least partially on the electrical load, receives data representative of an actual outdoor temperature, and initiates the economizer cycle if the actual outdoor temperature is equal to or below the maximum acceptable outdoor temperature.

Abstract: A refrigeration system includes a powered barrier or air door that controls air flow between refrigerated compartments. The powered door includes a powered actuator that is electrically connected to and in parallel with an electric heating element configured to melt ice and/or frost that could otherwise interfere with operation of the door. A switch determines if the door is opened or closed and a controller provides electrical power to the powered actuator and the electric heating element until the door shifts to the desired opened or closed position.

Abstract: An aircraft air conditioning system comprises an ambient supply line, an ambient air cooling device connected to the ambient air supply line and adapted to cool ambient air flowing through the ambient air supply line, an ambient air discharge line connected to the ambient air cooling device and being connectable to an aircraft cabin to supply ambient air cooled by the ambient air cooling device to the aircraft cabin, and a refrigerating apparatus. The refrigerating apparatus comprises a refrigerant circuit allowing the flow of a two-phase refrigerant therethrough and is designed to convert the two-phase refrigerant, upon flowing through the refrigerant circuit, from the liquid state of aggregation into the gaseous state of aggregation and thereafter again back from the gaseous state of aggregation into the liquid state of aggregation. The refrigerant circuit of the refrigerating apparatus is adapted to supply cooling energy to the ambient air cooling device.

Abstract: A method and device are provided for regulating the temperature and relative humidity of the air in a building having microporous external walls and external thermal insulation, including air circulation spaces provided between the walls and the thermal insulation, and a device for supplying the spaces with a controlled air flow, the device configured for supplying the spaces with air substantially saturated with water vapour.

Abstract: Environmental control systems and methods to control environmental temperature of an enclosed space by integrating a passive heat exchange subsystem (e.g., a loop heat pipe (LHP) heat exchange subsystem) having a closed loop heat exchange fluid circuit in heat-exchange relationship with the enclosed space for providing environmental temperature control therewithin, a RAM-air subsystem having a RAM-air circuit for circulating RAM cooling air, and a vapor compression cycle machine (VCM) subsystem having a VCM fluid circuit having a compressor, an evaporator, a condenser and an expansion valve.

Abstract: A method for operating a ducted fumehood with increased energy efficiency, wherein the method comprises: passing exhaust air from the ducted fumehood through a heat exchanger, and passing other air through the heat exchanger, so as transfer heat content from the exhaust air to the other air, or to transfer heat content from the other air to the exhaust air, so as to temperature-condition the other air.

Abstract: Generally, a variable fan speed control in an HVAC system is described. Such methods and systems to control fan speed can in turn improve efficiency of the HVAC system by minimizing power consumption, for example of the compressor. The control scheme is based on various operating conditions of compressor load and ambient air temperature, which are used to determine an optimum fan speed.

Abstract: A water cooler kit is provided for use with an evaporative cooler of a type comprising at least one cooling pad, a water reservoir, a water inlet to supply water to the reservoir from a water supply at least one conduit for distributing water onto said at least one cooling pad, a fan for moving air through said cooling pad, and a pump for transferring water from said reservoir to said conduit. The water cooler kit comprises a cooling plate disposed in the reservoir, a heat dissipating structure disposed outside of the evaporative cooler, and a heat transferring thermal conductor between the cooling plate and the heat dissipating structure to transfer heat from the cooling plate to the heat dissipating structure so that heat is extracted from water in the reservoir and dissipated outside the evaporative cooler.

Abstract: A method of operating an evaporator assembly in which a refrigerant is circulatable to transfer heat out of air in a housing. The evaporator assembly includes a thermostat that completes a solenoid control circuit when the temperature of the air in the housing is above a predetermined cut-in temperature, and opens the solenoid control circuit when the temperature of the air is below a predetermined cut-out temperature. The thermostat completes a fan control circuit when the solenoid control circuit is open, and opens the fan control circuit when the solenoid control circuit is completed. A fan controller detects a signal voltage when the fan control circuit is completed, and provides a first predetermined drive voltage to a fan motor drive. Upon the fan controller failing to detect the signal voltage, a second predetermined drive voltage being greater than the first predetermined drive voltage is provided to the motor drive.

Abstract: A heat pump system for a vehicle may include a cooling apparatus that supplies and circulates coolant to a motor and an electrical equipment through a cooling line, wherein the cooling apparatus includes a radiator, a cooling fan that ventilates wind to the radiator, and a water pump connected to the cooling line, and an air conditioner apparatus connected through a refrigerant line, wherein the air conditioner apparatus includes a water-cooled condenser connected to the cooling line to change a temperature of the coolant using a waste heat that has occurred in the motor and the electrical equipment according to each mode of the vehicle and that is connected to the refrigerant line to enable an injected refrigerant in the refrigerant line to exchange a heat with the coolant at the inside thereof, and an air-cooled condenser connected in series to the water-cooled condenser through the refrigerant line.

Abstract: A method for operating a refrigeration system for a container for refrigerating chilled cargo includes providing a refrigeration system including a compressor and an evaporator fan associated with an evaporator. The method also includes determining the temperature of supply air and the temperature of return air. The method further includes determining one of a requirement for heating and a requirement for cooling based on the temperature of the return air and the temperature of the supply air. The method additionally includes activating the evaporator fan when a requirement for heating is determined and increasing the speed of the evaporator fan when increased heating is determined. The method also includes activating the compressor and the evaporator fan when a requirement for cooling is determined and increasing the power supplied to the compressor and maintaining the evaporator fan at a first speed when increased cooling is determined.

Abstract: A air channeling sub-system may include a mechanical cooling section and a direct evaporative cooling section. The direct evaporative cooling section may be downstream from the mechanical cooling section. Cooling air is channeled through the air channeling sub-system and into the room. If a first set of control conditions is met, the air channeling sub-systems is operated in an adiabatic mode. The adiabatic mode includes channeling cooling air through the direct evaporative cooling section to evaporate water into the cooling air. If a second set of control conditions is met, the air channeling sub-system is operated in a hybrid mode. The hybrid mode includes channeling cooling air through the mechanical cooling section to remove heat from the cooling air and channeling the cooling air through the direct evaporative cooling section to evaporate water into the cooling air.

Abstract: Systems and methods for dehumidifying and conditioning air for a commercial building are presented. In one instance, a system involves ventilating a building at a rate higher than the required outdoor airflow rate in order to compensate for the fan being turned off when the compressor is off. Other systems and methods are presented.

Abstract: A refrigerated display case, an air curtain system, and a method of providing an air curtain are provided. The air curtain is suitable for use with a refrigerated display case of the type having an open front, including those with a door selectively covering the open-front. The air curtain includes a secondary layer formed of ambient air cooled by exposure to a refrigerated primary layer.

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: The present invention provides a control method for a refrigerator that can acquire a pump-down effect without performing an additional pump-down process and furthermore, efficiently utilize residual cool air remaining in a freezer evaporator.

Abstract: Recuperation systems and methods are applied to vapor compression cycles in dehumidification, such as in air conditioning. In some embodiments, a method for dehumidification includes introducing a refrigerant from a heating unit to a cooling unit along a first path; introducing the refrigerant from the cooling unit to the heating unit along a second path different from the first path; introducing the refrigerant from the heating unit to the cooling unit along a third path different from the first path; and contacting the cooling unit and the heating unit with a first gas stream.

Abstract: A refrigerator includes a refrigerator cabinet, an inner liner disposed within the refrigerator cabinet, a first shelf disposed within the refrigerator cabinet, the first shelf having a back end and an opposite front end, the first shelf positioned to allow air flow between the back end and the inner liner, and a plurality of shelves disposed within the cabinet, each of the shelves having a back end and an opposite front end, each of the shelves is positioned to allow air flow between the back end of each of the shelves and the inner liner. The refrigerator further includes a conduit providing supply air, a baffle positioned above the first shelf and fluidly connected to the conduit, and an elongated air outlet positioned above the baffle and fluidly connected to the conduit for providing a first cold air stream from the supply air proximate a ceiling of the refrigerator cabinet.

Abstract: An evaporator includes an inlet manifold, an outlet parallel to the inlet manifold, and a collection manifold parallel and adjacent to the outlet manifold. First flow conduits extend from the inlet manifold to the collection manifold, and at least one second flow conduit extends from the collection manifold to the outlet manifold. The evaporator can be housed within an enclosure to provide a cased evaporator. Air is conditioned by transferring heat from the air to refrigerant as the air passes through the evaporator. The refrigerant is received from outside the enclosure into the inlet manifold, and is directed through first and second refrigerant passes to receive heat from the air. The flow of refrigerant is received from the second pass into a collection manifold, is transferred to an outlet manifold, and is removed from the enclosure.

Abstract: A vaporizer for a cooling circuit, particularly for a motor vehicle, is provided that includes a vaporization region, wherein a coolant flowing through the vaporization region takes up heat from an outside region, wherein the vaporization region is downstream of a first expansion element on the inlet side in the direction of flow of the coolant, wherein an exchanger member is provided between the vaporization region and the first expansion element, and wherein heat can be transferred from the coolant upstream of the vaporization region to the coolant downstream of the vaporization region.

Abstract: Climate control systems and methods of operating climate control systems for motor vehicles are provided herein. In one example, the method comprises the steps of expanding a condensed refrigerant stream with an expansion valve to form a partially expanded refrigerant stream. The partially expanded refrigerant stream comprises a refrigerant liquid phase and a refrigerant vapor phase. The partially expanded refrigerant stream is separated with a liquid-vapor separator into a refrigerant liquid stream and a refrigerant vapor stream. Heat is exchanged between air passing across or through an evaporator and the refrigerant liquid stream passing internally through and expanding in the evaporator to form a superheated refrigerant gas stream.

Abstract: Automatic shutdown systems are used with refrigerated air cargo containers. When a fire signature is detected by one or more sensors, the container exhaust fan(s) are automatically shut down or their external airflow is automatically restricted. In addition, or in the alternative, the shutdown system may likewise act when air transit is detected, such as acceleration and/or a change in altitude.

Abstract: A refrigeration controller within a retail refrigeration cabinet controls the temperature (502) so that it approaches the maximum allowable temperature by using the most efficient fan speed for loading and time of day (507) but is varied by customer presence (505) to adhere to an algorithm reducing the noise (506) created by such machines while still creating sufficient cooling to remain within the maximum temperature while providing acceptable power economy.

Abstract: Methods of operation for refrigerator appliance configurations with a controller, a condenser, at least one evaporator, a compressor, and two refrigeration compartments. The configuration may be equipped with a variable-speed or variable-capacity compressor, variable speed evaporator or compartment fans, a damper, and/or a dual-temperature evaporator with a valve system to control flow of refrigerant through one or more pressure reduction devices. The methods may include synchronizing alternating cycles of cooling each compartment to a temperature approximately equal to the compartment set point temperature by operation of the compressor, fans, damper and/or valve system. The methods may also include controlling the cooling rate in one or both compartments. Refrigeration compartment cooling may begin at an interval before or after when the freezer compartment reaches its lower threshold temperature.

Abstract: An air conditioner having a refrigeration cycle including a compressor, a radiator, a pressure-reducing device and an evaporator, a total heat exchanger for performing heat-exchange between outdoor air and air under cooling operation using the evaporator for a room to be air-conditioned, and for ventilating the room to be air-conditioned, and a desiccant rotor having a moisture adsorbing area for adsorbing moisture in the outdoor air when the outdoor air is introduced, and regenerating the moisture adsorbing area by heat of the radiator, the outdoor air successively flowing through the total heat exchanger, the evaporator and the moisture adsorbing area in this order and then entering the room to be air-conditioned.

Abstract: A device for cool drying a gas in the direction of flow of the coolant includes a closed cooling circuit with successively a compressor, a condenser and an expansion device and an evaporator that is the primary part of a heat exchanger and that has a secondary part through which the gas to be dried is guided. A bypass pipe in the cooling circuit can be closed by a bypass valve with a valve element and a pressure-sensitive element acting on it that is exposed to a local control pressure in the cooling circuit. A control pressure pipe connects the pressure sensitive element to the closed cooling circuit upstream of the outlet of the evaporator.

Abstract: A method for controlling an aircraft air conditioning system includes the steps of detecting an operating state of an air conditioning unit of the aircraft air conditioning system and controlling the temperature of a process air mass flow supplied to the air conditioning unit in dependence on the operating state of the air conditioning unit.

Abstract: According to an embodiment, a refrigeration system that cools a compartment includes a compressor, a condenser, a condenser fan, a condenser fan motor, an evaporator, an evaporator fan, an evaporator fan motor, and tubing adapted to transport refrigerant through the refrigeration system in a circulation order from the compressor to the condenser to the evaporator and back to the compressor again. The evaporator fan may be positioned in an air inlet path to the evaporator. The evaporator fan motor may be outside a chilled air circuit of the evaporator.

Abstract: An air conditioning system for an aircraft includes at least one air conditioning pack which for the purpose of heat dissipation can be connected to at least one cooling air inlet of the aircraft and is designed to cool air and to introduce it at a cabin pressure into a passenger cabin of the aircraft. A separately operable cooling device is designed to cool the ambient air flowing into the cooling air inlet.

Abstract: A cold plate device and method for cooling electronic systems is provided including a generally flat thermally conductive body having a cooling channel within the thermally conductive body. A first cooling fluid travels through the cooling channel to remove heat from the conductive body. A vapor compression cycle system is coupled to the thermally conductive body such that the first cooling fluid removes heat from a second cooling fluid in a portion of the vapor compression cycle system.

Abstract: Disclosed is an apparatus and a method for controlling a driving of a fan motor for a refrigerator. In a normal driving mode that a temperature of the inside of the refrigerator is higher than a predetermined temperature, the fan motor is driven in a normal speed, and in a waiting mode that the temperature of the inside of the refrigerator is lower than the predetermined temperature, the fan motor is driven in a driving speed very lower than that of the normal driving mode, without stopping of the fan motor, accordingly it is capable of preventing moisture introduced into the fan motor from being frozen, thereby preventing the fan motor from being locked.

Abstract: A thermal system and method are provided configured for improved efficiency. The system is typically configured to provide outside air to a building with the combination of a ground/water source heat pump and a dedicated outside air unit.

Abstract: A heat exchanger includes an air channel configured to receive air from an equipment rack. A fluid circuit is provided having a bi-phase coolant flowing therethrough. The fluid circuit includes a coolant channel coupled to the equipment rack and positioned adjacent to the air channel. The bi-phase coolant is part liquid and part gas as the bi-phase coolant flows through the coolant channel. The bi-phase coolant is configured to condition the air flowing through the air channel.