Abstract: A mobile cooler having an ice maker includes: a main body having first and second spaces which are thermally blocked; a cooling device positioned at a lower portion of the main body and providing cooling air to the first and second spaces; a plurality of shelves installed in the first space; an ice tray installed in the second space; an ice bank positioned on a lower surface of the ice tray and detachably mounted in the main body; and a cover that covers an opening in which the ice bank is inserted.

Abstract: A refrigeration vapor compression system including a compressor, an electronic expansion valve with closed loop feedback into a controller, sensors to measure and monitor the system superheat and sub-cooling, and condenser fans controlling the flow of air through the condensing coils, the refrigeration system is operated in at least one of two functional modes to either give priority control to the level of superheat in the system or maintain a minimum level of sub-cooling in the system.

Abstract: A refrigeration system including a suction line heat exchanger having a first conduit including a refrigerant liquid which flows inside of the first conduit from the condenser to the evaporator. Also the refrigeration system includes a second conduit in thermal communication with the first conduit and includes a refrigerant fluid, typically a vapor, which flows inside of the second conduit in an opposite direction of flow from the first conduit from the evaporator to the compressor. Additionally, at least one heating device is in thermal communication with at least one of the first conduit and second conduit and is configured to communicate with a refrigeration control system to apply heat along a portion of both the first conduit and the second conduit adjacent to the heating device thereby regulating the flow rate of the refrigerant liquid in the first conduit and the second conduit.

Abstract: A method of operating a heat pump having an inside heat exchanger, an outside heat exchanger, a compressor, and valves that control the circulation of a refrigerant such that in one operating mode the inside heat exchanger operates as an evaporator while in the other operating mode it operates as a condenser. When switching from one operating mode to the other operating mode first the compressor is stopped, then the inside heat exchanger and the outside heat exchanger are directly connected via the valves until pressure is equal in both of the heat exchangers. Subsequently the valves are moved back into the positions appropriate for the desired operating mode, and the compressor is restarted.

Abstract: A two-stage air source heat pump having an extended operational temperature range combines intercooling, regeneration, and inter-stage vapor recirculation. Cooling a working gas in between the lower and higher-pressure stages decreases the work required to compress the working gas. The entire system may be computer controlled using sensors to monitor flows, temperatures, and pressures in and around the system.

Abstract: In various implementations, an air conditioning system may automatically adjust an amount of refrigerant using an accumulator. The air conditioning system may operate in at least two operation modes including a cooling operation and a reheat operation. The amount of refrigerant allowed to flow to a condenser of the system may be based at least partially on the operating mode of the air conditioning system.

Abstract: An air conditioning system for an operator cab of machine includes a condenser, an evaporator, a compressor and a controller operable to control an operation of the compressor. The controller maintains a pre-defined compressor run time when the compressor is in an ON state. The controller is configured to determine a temperature of the evaporator and compare it with at least one of a first lower threshold temperature value and a second lower threshold temperature value being less than the first lower threshold temperature value. The controller outputs a compressor control command signal to change the operational state of the compressor to an OFF state when the determined temperature of the evaporator is less than at least one of the first lower threshold temperature value for a first time period, and the second lower threshold temperature value for a second time period being less than the first time period.

Abstract: The invention relates to the use of a composition comprising 2,4,4,4-tetra-fluoro-but-1-ene and 1-methoxyheptafluoropropane as a heat transfer fluid. The invention also relates to associated units, methods and compositions.

Abstract: To enable temperature adjustment of constant temperature liquid and pressure equalizing operations to be performed with a simple circuit configuration using one electronic expansion valve.

Abstract: A method for controlling an operation of a refrigerator includes circulating and/or supplying a refrigerant to a refrigeration chamber evaporator and a freezer chamber evaporator, determining whether to stop an operation of the compressor a predetermined time from or after an initial driving point in circulating and/or supplying the refrigerant; opening a refrigeration chamber switching valve, a freezer chamber switching valve and/or a refrigerant flow path valve, and subsequently closing the valve(s) when it is determined that the compressor should be stopped; and stopping the compressor after opening the refrigeration chamber switching valve, the freezer chamber switching valve and/or the refrigerant flow path valve.

Abstract: A cooling system is provided with a GM refrigerator using helium gas, a compressor that compresses the helium gas returned from the GM refrigerator and supply the gas to the GM refrigerator, and a control unit. The control unit includes a measurement acquisition unit that acquires measurements of a plurality of different parameters representing a status of the GM refrigerator, or the compressor, or both, and an analysis unit that conducts multivariate analysis of the measurements acquired by the measurement acquisition unit.

Abstract: A system has a compressor. A heat rejection heat exchanger is coupled to the compressor to receive refrigerant compressed by the compressor. An ejector has a primary inlet coupled with heat rejection heat exchanger to receive refrigerant, a secondary inlet, and an outlet. The system has a heat absorption heat exchanger. The system includes means for providing at least of a 1-10% quality refrigerant to the heat absorption heat exchanger and an 85-99% quality refrigerant to at least one of the compressor and, if present, a suction line heat exchanger.

Abstract: A nonflammable refrigerant mixture is disclosed. The non-flammable refrigerant mixture consists essentially of (a) from 20 weight percent to 25.5 weight percent HFO-1234yf, (b) from 20 weight percent to 24.5 weight percent HFC-32, (c) from 24.5 weight percent to 30 weight percent HFC-125 (d) from 25.5 weight percent to 30 weight percent HFC-134a, and (e) from about 0.0001 weight percent to 10 weight percent trans-HFO-1234ze. These refrigerant mixtures are useful as components in compositions also containing non-refrigerant components (e.g. lubricants), in processes to produce cooling, in methods for replacing refrigerant R-404A or R-507, and in refrigeration apparatus.

Abstract: A method is disclosed for generating and distributing electric power for localized use. The method entails providing an enclosed building having an air conditioning and ventilation unit for supplying cooled air within the building, the unit including a closed loop circuit configured to operate a closed loop refrigeration cycle, including a compressor operable to compress a working fluid of the closed loop circuit. The method further includes engaging an internal combustion engine with the compressor and operating the internal combustion engine to drive the compressor, thereby transferring energy to the refrigeration cycle. The method may also involve engaging an electric motor with the compressor and operating the electric motor to drive the compressor, thereby transferring energy to the refrigeration cycle.

Abstract: A heat pump for heating a vehicle interior includes a compressor arranged in a heat-pump circuit of a working medium, a condenser, a throttle valve and an evaporator. Gaseous working medium is compressed in the compressor. The compressor outlet is connected to the inlet of the condenser in which the working medium condenses, at the same time discharging heat, the heat being delivered as useful heat directly or indirectly to a consumer. The condenser is followed by a jet pump, to which the liquid working medium coming from the condenser is delivered as driving medium and to which the gaseous working medium flowing out from the evaporator is delivered as suction medium, in such a way that the driving medium and suction medium are compressed in the jet pump as a two-phase mixture. The jet-pump outlet is connected to the inlet of a separator, to which the two-phase mixture is delivered and in which the gaseous working medium is separated from the liquid working medium.

Abstract: A multi-split air or ground source heat pump system designed to provide a residential application with space heating and cooling, along with supplemental hydronic heating and potable water preheating. The supplemental hydronic heating supports applications like radiant floor heating and heating swimming pools. Commercially, the multi-split air or ground source heat pump system expands on this technology to incorporate comfort and/or process heating, cooling, and hydronic heating applications utilizing multiple types of energy sources.

Abstract: An air-conditioning apparatus is provided with a heat-source device that supplies a refrigerant, a relay unit that exchanges heat of a heat medium such as water or anti-freezing fluid supplied from the heat-source device in an intermediate heat exchanger and supplies the heat medium, an indoor unit that exchanges heat between a use side heat exchanger through which the heat medium supplied from the relay unit flows and indoor air and performs cooling or heating in the indoor space, a controller that controls operations of the heat-source device, the relay unit and the indoor unit, and a third temperature sensor that detects the temperature of the heat medium flowing through the use side heat exchanger, and if an abnormality in at least one of the heat-source device and the relay unit is detected, the controller continues the operation of the indoor unit while the temperature detected by the third temperature sensor remains within a first predetermined temperature range.

Abstract: A number of variations of the invention may include a product including a cabin exhaust air heat recovery system including a heat pump system having a non-freezing evaporator.

Abstract: A refrigeration system including a condenser having a condenser inlet and a condenser outlet, a compressor fluidly connected to the condenser inlet, and an evaporator including an evaporator inlet and an evaporator outlet. The evaporator outlet is fluidly connected to the compressor. A compressor speed sensor senses an operational speed of the compressor. An electric expansion valve (EEV) is fluidly connected to the condenser outlet and the evaporator inlet. The EEV includes a valve member that is selectively positioned to establish a desired opening to pass refrigerant from the condenser to the evaporator. A controller is electrically connected to the EEV and the compressor speed sensor. The controller establishes the desired opening of the valve member based on one of a cooling mode superheat value and a heating mode super heat value, and the operational speed of the compressor.

Abstract: A heat exchanger assembly, a refrigerator, and a method of controlling a refrigerator are provided. The heat exchanger assembly may include a heat exchanger provided on or at a side of a refrigerator body, the heat exchanger including a refrigerant tube, in which a refrigerant may flow, and at least one heat exchange fin, in which the refrigerant tube may be inserted, a temperature sensor disposed on or at an inlet-side or an outlet-side of the heat exchanger to detect a temperature of the refrigerant, and a sensor holder to fix a guide tube disposed on or at an inlet-side or outlet-side of the refrigerant tube and the temperature sensor in a state in which the guide tube is in contact with the temperature sensor.

Abstract: A split air conditioning system for conditioning a plurality of zones within a single living area of a building, that includes a single outdoor unit; a refrigerant flow pathway made up of a plurality of refrigerant conduits having a common refrigerant flow path portion and at least two divergent flow path portions, a first divergent flow path and a second divergent flow path and the first evaporator and second evaporator are in parallel with one another; at least one throttling device; a portioning device configured to selectively and proportionately regulate the flow of a refrigerant fluid to the first evaporator and the second evaporator, respectively where the compressor is configured to be capable of simultaneously driving both the first evaporator and the second evaporator at their full cooling capacity.

Abstract: The present invention relates, in part, to heat transfer and refrigerant compositions and methods that include HFC-32; HFO-1234ze and HFC-125.

Abstract: Battery powered transport refrigeration assembly for semi-trailers. The assembly relates to large-vehicle refrigeration systems (reefers) and more particularly to semi-truck reefers.

Abstract: The invention relates to a refrigeration circuit having a mono- or multi-component refrigerant circulating therein, said refrigeration circuit comprising, in the direction of flow, a condenser, a collecting container, a relief device connected upstream of an evaporator, an evaporator and a compressor unit with single-stage compression. According to the invention, there is an intermediate relief device (a) arranged between the condenser (1) and the collecting container (3). Furthermore, there is disclosed a method of operating a refrigeration device in which pressure relief of the refrigerant to an (intermediate) pressure of 5 to 40 bar is effected in the intermediate relief device (a) arranged between the condenser (1) and the collecting container (3).

Abstract: A coaxial economizer for use in a chiller system comprising an inner housing and an outer housing having a common longitudinal axis. The outer housing has an inlet for receiving a fluid from a upstream compressor stage of a multistage compressor and an outlet for conveying a fluid to a downstream compressor stage of a multistage compressor. A flow chamber forms a fluid flow path about the inner housing. A flash chamber is coterminous with the flow chamber and flashes fluid in a liquid state to a gas state. A flow passage between said flash chamber and the flow chamber for conveying a flashed gas from the flash chamber to the flow chamber; wherein the flashed gas conveyed from the flash chamber and the fluid received from the inlet of the outer housing mix along the fluid flow path toward the outlet of the outer housing.

Abstract: A method is provided for calibrating an engine throttle position sensor operation of a refrigeration system powered by a fuel fired engine.

Abstract: The invention relates to a refrigeration circuit having a mono- or multi-component refrigerant circulating therein, said refrigeration circuit comprising, in the direction of flow, a condenser, a collecting container, a relief device connected upstream of an evaporator, an evaporator and a compressor unit with single-stage compression. According to the invention, there is an intermediate relief device (a) arranged between the condenser (1) and the collecting container (3). Furthermore, there is disclosed a method of operating a refrigeration device in which pressure relief of the refrigerant to an (intermediate) pressure of 5 to 40 bar is effected in the intermediate relief device (a) arranged between the condenser (1) and the collecting container (3).

Abstract: In various implementations, air conditioners may include a high pressure portion and a low pressure portion. A bypass line may divert a portion of the refrigerant from the high pressure portion to the low pressure portion to reduce the pressure of at least a part of the high pressure portion. The bypass line may be opened automatically.

Abstract: A cooling system and a control method thereof are provided. The cooling system may include a first compressor, a second compressor disposed downstream of the first compressor, an outdoor heat exchanger the performs heat exchange between refrigerant compressed in the first and/or second compressor and external air, an expansion device that decompresses the refrigerant condensed in the outdoor heat exchanger, a cooling evaporator evaporating the refrigerant decompressed in the expansion device, a bypass tube that guides refrigerant compressed in the first compressor to the outdoor heat exchanger, bypassing the second compressor, and a valve device controlling the flow of refrigerant discharged from the first compressor so as to selectively introduce refrigerant into the second compressor.

Abstract: A method is provided for managing a flooded start of a compressor in a vapor compression system. Following an initial bump start, a determination is made as to whether working fluid in a liquid state remains in the sump of the compressor. If working fluid in a liquid state remains in the compressor sump, an additional bump start of the compressor is completed, followed by another determination as to whether working fluid in a liquid state still remains in the compressor sump. If working fluid in a liquid state remains in the compressor sump, another bump start of the compressor is initiated and the sequence repeated until no working fluid in the liquid state remains in the compressor sump. A normal start of the compressor may be initiated after determining no working fluid in the liquid state remains in the compressor sump.

Abstract: A novel process for activating available compressors in multiple compressor air conditioning systems, using an Optimum Stage-Up Process. This process is programmed into a controller as an algorithm, to provide a process for fast compressor start. This process shortens the time to initiate operation of compressors in a multi-compressor air conditioning system required to meet the demand call under any load condition, and hence shortens the time required for the actual sensed interior region air temperature to reach the interior region temperature set point. The Optimum Stage-up Algorithm estimates the number of compressor stages or steps that must be initiated, based on sensed or measured values, to meet the demand at any load condition. These measured values include the sensed temperature of the interior region being cooled, which is compared to the temperature set point of this interior region as well as measured mixed air temperature and supply air temperature.

Abstract: A cooling system includes a condenser and first and second cooling circuits. The condenser is configured to condense refrigerant to a liquid. The first cooling circuit includes a direct expansion valve coupled to the condenser, a first evaporator coil coupled to the direct expansion valve, and a compressor coupled to the first evaporator coil. The first cooling circuit receives at least a first portion of the liquid refrigerant and output first refrigerant vapor, and the compressor receives the first refrigerant vapor and output a compressor refrigerant output to the condenser. The second cooling circuit includes a pump coupled to the condenser, an economizer valve coupled to the pump, and a second evaporator coil coupled to the economizer valve. The second cooling circuit receives at least a second portion of the liquid refrigerant and output a second vapor refrigerant to the condenser.

Abstract: A system, compressor, and method that cools an electronics module with a low-pressure refrigerant. The system, compressor, and method utilize a temperature sensor that detects a temperature of the low pressure refrigerant and communicates with the electronics module. Based on the temperature detected by the temperature sensor, the electronics module controls a liquid dry out point of the refrigerant that is used to cool the electronics module.

Abstract: A HVAC system including a multi-function unit for conditioning and controlling the flow of refrigerant. The multi-function unit may be contained within a housing that houses a receiver/dryer, integral heat exchanger and thermal expansion valve.

Abstract: The present invention relates to an air-conditioning apparatus which is capable of performing a cooling operation in a stable manner in an environment having a low outside temperature. The air-conditioning apparatus according to the present invention comprises: a housing including an inlet, a bypass inlet, and an outlet; a fan configured to introduce air into the housing and discharge the air from the housing; a heat-exchange flow path deposed between the inlet and the outlet; a heat exchanger disposed at the heat exchange flow path; and a bypass flow path disposed between the bypass inlet and the outlet.

Abstract: A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to (1.) the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller and (2.) the drive motor of the chiller's compressor for motor cooling purposes. By use of a variable speed-driven motor to drive the compressor, optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrication system.

Abstract: A method for cooling a fluid or a body by means of at least a first vapour compression circuit containing a first heat transfer fluid and at least a second vapour compression circuit containing a second heat transfer fluid, the method including: measuring the temperature of the external surroundings; and setting the temperature of the second heat-transfer fluid to evaporation, according to the temperature of the external surroundings. Also, an installation suited to implementing this method.

Abstract: A refrigeration system including a first compressor and a second compressor, operating in tandem, wherein the first compressor includes a compression capacity different than the compression capacity of the second compressor. A method for operating a refrigeration system including a first compressor and a second compressor operating in tandem; wherein the first compressor comprises a first compression capacity and the second compressor comprises a second compression capacity larger than the first compression capacity the method comprising the steps of: determining a cooling demand; operating the first compressor in a first stage of cooling; operating the second compressor in a second stage of cooling; and operating the first compressor and the second compressor in a third stage of cooling.

Abstract: An evaporator setpoint temperature for a refrigeration system is adjusted by an electronic control module to maximize a ratio of volume of condensate produced per unit of electricity consumed. When the control module detects a change in the relative humidity of air entering an evaporator in the refrigeration system, the module determines the new dew point for the air, compensates the dew point value by a predetermined offset value, and changes the setpoint for refrigerant temperature in the evaporator to the compensated dew point value. The control module operates the refrigeration system to drive the evaporator temperature to the compensated dew point value. Refrigeration system parameters measured and modified by the control module include operating speed of compressors, number of operating compressors, refrigerant flow through an expansion valve, compressor suction pressure, and fan speeds for the condenser and evaporator.

Abstract: A thermal management system for a vehicle includes a traction motor and a battery pack. The thermal management system comprises a battery circuit for cooling a battery circuit thermal load including the battery pack, a battery circuit temperature sensor positioned to sense a temperature relating to a temperature of the battery circuit thermal load, and a controller. The controller is configured to control the battery circuit to maintain the temperature sensed by the battery circuit temperature sensor below a first battery circuit temperature limit when the controller detects that the vehicle is not connected to an external electrical source, and to maintain the temperature sensed by the battery circuit temperature sensor below a second battery circuit temperature limit that is lower than the first battery circuit temperature limit when the controller detects that the vehicle is connected to the external electrical source.

Abstract: The invention relates to a method for operating an aircraft cooling system (10), comprising the steps guiding a cooling medium through a cooling circuit (26) which is coupled to a refrigerating machine (12) and to at least one cooling energy consumer (14a-14d) in order to supply cooling medium cooled by the refrigerating machine (12) to the cooling energy consumer (14a-14d), and controlling the operation of the refrigerating machine (12) by a control unit (42), such that coolant medium cooled by the refrigerating machine (12) to a predetermined cooling medium flow temperature is supplied to the cooling energy consumer (14a-14d). The method for operating an aircraft cooling system (10) further comprises detecting a cooling energy requirement of the cooling energy consumer (14a-14d) and transmitting a signal indicative of the cooling energy requirement of the cooling energy consumer (14a-14d) to the control unit (42).

Abstract: A machine for a temperature regulation arrangement that includes a closed area within the machine leading a temperature regulating chamber positioned adjacent a heat source, in which there are a number of liquid collectors arranged so that each has a feed take off that provides a elevated passage way from one liquid collector to the next.

Abstract: A method for monitoring gas pressure in a heat rejecting heat exchanger in a cooling circuit is disclosed. In the heat rejecting heat exchanger, pressure is controlled by means of a control unit, said control unit controlling at least one valve. The present capacity of one or more compressors in the cooling circuit compared to a maximum capacity of the one or more compressors is established. The maximum capacity may be the rated capacity of the compressors, or it may be a maximum capacity under the given circumstances and/or the given operating conditions. If the present capacity of the one or more compressors is at least at a level corresponding to a pre-set percentage of the maximum capacity, a period of time elapsed from a point in time where the compressor capacity reached said level is established. If the established period of time has a duration which is longer than a pre-set period of time, then it is concluding that the cooling medium is in a gas loop operational mode.

Abstract: The use of a ternary composition of 2,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane and difluoromethane, as a heat-transfer fluid, in compression refrigeration systems with exchangers operating in counterflow mode or in cross-flow mode with counterflow tendency. A heat-transfer process in which a ternary composition of 2,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane and difluoromethane is used as a refrigerant in compression systems with exchangers operating in counterflow mode or in cross-flow mode with counterflow tendency.

Abstract: A method is provided including receiving a first input indicative of a desired design capacity of a refrigeration system, and receiving a second input indicative of a desired maximum acoustical noise of the refrigeration system. The method also includes iteratively selecting a candidate compressor system from a set of compressor systems, and iteratively selecting a candidate condenser system from a set of condenser systems. In addition, the method includes simulating operation of the refrigeration system based on the candidate compressor system and the candidate condenser system until a suitable refrigeration system is established having a computed design capacity greater than or equal to the desired design capacity, and a computed maximum acoustical noise less than or equal to the desired maximum acoustical noise. The method further includes providing an output indicative of the candidate compressor system and the candidate condenser system of the suitable refrigeration system.

Abstract: A refrigeration system 4 controlled by a control system 26, wherein the refrigeration system 4 comprises: an evaporator 8, a compressor 10, a condenser 12, and an expansion arrangement 15. The control system 26 is adapted: to establish a momentary cooling requirement based on the differential between a set-point temperature and an actual temperature averaged over time, to form a requirement variable relating to the momentary cooling requirement, to fix a first duration during which the compressor is switched on and a second duration during which the compressor is switched off, and to switch on and to switch off the compressor according to the first and second durations. The refrigeration system 4 comprises a first shut-off valve 20. The control system 4 is adapted: to close the first shut-off valve 20 in connection with switching off the compressor 10, and to open the first shut-off valve 20 in connection with switching on the compressor 10.

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: An air conditioning apparatus and a control method thereof are provided. The air conditioning apparatus includes a first switch valve, a compressor, a decompression element, a second switch valve, a condenser, and an evaporator. The control method of an air conditioning apparatus includes steps of setting a preset temperature, measuring an indoor temperature, and comparing the preset temperature with the indoor temperature. When the indoor temperature is lower than the preset temperature, the first switch valve and the second switch valve are turned on and the compressor is turned off; and when the indoor temperature is higher than the preset temperature, the first switch valve and the second switch valve are turned off and the compressor is turned on.

Abstract: A transport refrigeration system with a direct drive compressor arrangement is provided with a variable speed electrically driven booster compressor that operates in series with the direct drive compressor. The speed of the booster compressor is controlled to either boost or decrease the system capacity. The booster compressor also acts to regulate the flow of refrigerant from the evaporator during periods of operation in which the direct drive compressor might otherwise become overloaded.

Abstract: Systems and methods of capturing and sequestering carbon dioxide, comprising mixing a substantially non-aqueous solvent and an alkali such that the solvent and alkali form a solvent suspension, mixing water and a flue gas containing carbon dioxide with the solvent suspension such that a reaction occurs, the reaction resulting in the formation of a carbonate, water and heat.