Abstract: A vapor compression refrigeration system for providing cold storing which; during a conventional cycle provides cooling to an indoor heat exchanger in the conventional fashion, during a cooling charging cycle refrigeration effect is stored in a heat storage vessel by refrigerant evaporation with the indoor heat exchanger being by-passed and during a discharging cooling cycle refrigerant passes through the heat storage vessel without evaporation and evaporates in the indoor heat exchanger to provide space cooling.

Abstract: A refrigerator includes a first and second compartments which are cooled by first and second heat exchangers, respectively, of a cooling system. The first heat exchanger includes upstream and downstream heat exchanger sections. A first valve is arranged for conducting refrigerant from the upstream heat exchanger section either to the downstream heat exchanger section or to a second valve disposed upstream of the second heat exchange. The second valve can conduct the refrigerant either to the second heat exchange or to a compressor of the cooling system. By a selected actuation of the first valve, the first compartment can be used as a freezing compartment or a refrigeration compartment. By a selected actuation of the second valve, the second compartment can be used as a refrigeration compartment, or not cooled at all. If the second compartment is not cooled, it can be heated for use as a food fermentation compartment.

Abstract: A refrigeration appliance having at least two refrigeration compartments, each compartment having its own access door, is provided wherein there is a first evaporator for the first compartment, the first evaporator operating at a first pressure level and a second evaporator for the second compartment, the second evaporator operating at a pressure level higher than the first pressure level. There is a single condenser, a single compressor, a refrigerant circuit having a series of conduits with different flow control capabilities for providing a flow of refrigerant sequentially, that is, not simultaneously, to the first and second evaporators, the condenser and compressor, and various valves in the refrigerant circuit for directing refrigerant to a selected one of the evaporators from the condenser and for preventing a flow of refrigerant into the first evaporator when refrigerant is being directed into the second evaporator to cool the second compartment.

Abstract: The present invention provides method and apparatus for incorporating thermal storage and other low-temperature reservoirs with new or retrofittable refrigerant circuit devices to increase their thermal operating capacity and efficiency by subcooling refrigerant condensate with subcoolers, as illustrated in a plurality of structural arrangements, which allows simultaneous cooling of a refrigerated volume and recharging of the thermal storage system, and further, it may utilize proportional subcooling to proportionally control evaporator capacity.

Abstract: An object of the present invention is to provide an air conditioner in which the feedback of liquid refrigerant to a compressor is prevented and whose refrigerating cycle is constituted with an indoor side heat exchanger, a compressor, an outdoor side heat exchanger, and a pressure reducer. The controller of the air conditioner comprises a temperature control means which performs the cooling operation for a room in controlling the start or stop of the operation of the compressor based on the change of the room temperature, a protective means which stops the operation of the compressor compulsorily independent of the operation of the temperature control means when the open air temperature becomes lower than a specified temperature, and a display means for displaying the operation of the protective means.

Abstract: A heat storage type air conditioning system capable of performing refrigerant receiving and discharging control and oil quantity control, which, in operating the general cooling circuit and the cold radiating circuit simultaneously or separately, is free from difficulties that the compressor is damaged or the cooling capacity is lowered when the quantities of refrigerant in those circuits are excessively increased or decreased, and is able to continue the operations with the quantity of refrigerant and the quantity of ice machine oil adjusted to suitable values. In the heat storage type air conditioning system, evaporators are provided in a general cooling circuit driven by a compressor and in a cold radiating circuit driven by a refrigerant gas pump, respectively, so that those circuits operate independently of each other. Furthermore, bypass circuits are provided to allow refrigerant to flow between liquid pipes and between gas pipes in those circuits.

Abstract: A refrigerant flow switching device for alternately conveying refrigerant from a high pressure and a low pressure evaporator to a compressor of a refrigeration system, and a refrigerator using such a refrigeration system, includes a refrigerant flow switching valve for alternately conveying refrigerant from the high and low pressure evaporators to the compressor. Said switching valve is controlled by a pressure switch that utilizes the pressure difference between the refrigerant from the high pressure evaporator and that from the low pressure evaporator to cyclically open or close a switch assembly, moving the switch between low and high pressure positions.

Abstract: A method and apparatus for sequentially operating a refrigeration system with multiple evaporators is provided in which only one evaporator is operated at a time and is run until a detected demand for cooling associated with that evaporator is satisfied, or until a predetermined time period has elapsed which corresponds to the normal run time for that evaporator. If the run time expires prior to the demand for cooling being satisfied, and if demand for cooling by another one of the evaporators is present, then operation of the first evaporator is terminated and the other evaporator is operated. Efficiency enhancements are provided such as prematurely initiating operation of a second evaporator at the conclusion of operation of a first evaporator if it appears that a demand for cooling by the second evaporator will occur within a short period of time following termination of operation of the first evaporator.

Abstract: An air conditioning apparatus including an indoor device having a first heat exchanger, a second heat exchanger, and a radiant panel. Air circulation mode is switched to radiant mode when a room temperature has reached a temperature set by a user. Refrigerant is changeably circulated through the first and second heat exchangers in a cooling operation so that dew is not formed on the radiant panel.

Abstract: A method and apparatus for sequentially operating a refrigeration system with multiple evaporators is provided in which only one evaporator is operated at a time and is run until a set of fuzzy logic rules determines that one of the other evaporators should be operated or that the operation of the evaporators should be terminated.

Abstract: An evaporative heat pump apparatus which utilizes a computer and a pulse width modulation control system, solenoid valves and multiple evaporators to alter heat input capabilities by increments in order to maintain a constant rate of heat output regardless of changes in ambient conditions such as temperature, humidity, wind velocity and other factors is described.

Abstract: A refrigeration appliance having at least two refrigeration compartments, each compartment having its own access door, is provided wherein there is a first evaporator for the first compartment the first evaporator operating at a first pressure level and a second evaporator for the second compartment, the second evaporator operating at a pressure level higher than the first pressure level. There is a control device for directing refrigerant to a selected one of the evaporators from a condenser and for preventing a flow of refrigerant into the first evaporator when refrigerant is being directed into the second evaporator to cool the second compartment. Around the first compartment is placed insulation having a higher thermal resistance than that placed around the second compartment since the first compartment is kept at a lower temperature that the second compartment. A phase change material may be used in association with one or both of the evaporators.

Abstract: A refrigeration system for refrigerators having two or more compartments maintained at different temperatures comprises separate cycles for each compartment, each cycle in turn comprising separate evaporator means, heat exchanger means and compressor. To provide for cycle separation, the condenser may be split into separate units, connected by phase separators where appropriate. The system is particularly designed for use in connection with mixed, nonazeotropic refrigerants.

Abstract: A household refrigerator includes a refrigerant circuit having a compressor, a condenser receiving refrigerant from the compressor and a phase separator receiving refrigerant from the condenser. The liquid refrigerant containing portion of the phase separator is connected to the inlet of the freezer evaporator, the outlet of which is connected to the compressor. The vapor refrigerant containing portion of the phase separator is connected to the compressor. The fresh food evaporator is connected to the phase separator to receive liquid refrigerant from the phase separator and to return vapor refrigerant to the phase separator.

Abstract: A refrigerant flow switching device for alternatively conveying flow of refrigerant from either a high pressure or a low pressure evaporator to a compressor of a refrigeration system and a refrigerator using such a refrigeration system. The device utilizes the pressure difference between the higher pressure refrigerant from the high pressure evaporator and the lower pressure refrigerant from the low pressure evaporator or atmospheric pressure to open and close a first flow controller of the device positioned in a conduit leading from the high pressure evaporator to the compressor. The device further comprises a second flow controller, such as a check valve positioned in a conduit leading the low pressure evaporator to the compressor, which stays open only when the first flow controller is closed.

Abstract: A method for controlling a refrigerant path apparatus including a pressurized gas refrigerant path for a flow of a pressurized gas refrigerant which has not been substantially cooled to be liquefied, a pressurized liquid refrigerant path for a flow of a pressurized liquid refrigerant which is generated from the pressurized gas refrigerant by being cooled to be liquefied, a first heat exchanger means which is fluidly connected to the pressurized gas refrigerant path to supply the pressurized gas refrigerant into the first heat exchanger so that a heat exchange is carried out between the pressurized gas refrigerant in the first heat exchanger and the outside of the first heat exchanger, comprises the steps of allowing a flow of the refrigerant from the pressurized gas refrigerant path to the pressurized liquid refrigerant path when a supply of the pressurized gas refrigerant from the pressurized gas refrigerant path into the first heat exchanger means is prevented, and preventing the flow of the refrigerant fro

Abstract: A refrigerant flow switching device for alternatively conveying flow of refrigerant from either a high presure or a low pressure evaporator to a compressor of a refrigeration system and a refrigerator using such a refrigeration system. The device utilizes the pressure difference between the higher pressure refrigerant from the high pressure evaporator and the lower pressure refrigerant from the low pressure evaporator or atmospheric pressure to open and close a first flow controller of the device positioned in a conduit leading from the high pressure evaporator to the compressor. The device further comprises a second flow controller, such as a check valve positioned in a conduit leading the low pressure evaporator to the compressor, which stays open only when the first flow controller is closed.

Abstract: For use with a heat pump to increase cold weather heating efficiency, a supplemental heat exchanger and associated refrigerant flow lines for generating additional expanded refrigerant and transferring the additional expanded refrigerant to the heat pump compressor during the cold outside conditions, included isn a monitoring system for detecting and actively regulating the refrigerant pressure and temperature at a location in the supplemental heat exchanger and associated refrigerant flow lines just prior to the refrigerant entering the compressor. The monitoring system automatically connects the supplemental heat pump, to enhance the heating cycle capabilities, and disconnects the supplemental heat pump, when the enhanced heating cycle capabilities are no longer required.

Abstract: A transport refrigeration system including host and remote refrigeration systems having local and remote evaporators, respectively, for respectively controlling the temperatures of first and second compartments via cooling and hot gas heating cycles. The host and remote refrigeration systems each have a plurality of controllable valves, including a controllable valve in their respective suction lines, and they each have a suction line to liquid line refrigerant by-pass lines, enabling either the host or remote evaporator to function as a condenser for the other, while by passing the normal condenser function, and further enabling either evaporator to control to a lower temperature than the other, as desired.

Abstract: A multizone air conditioning system for cooling multiple zones by circulating refrigerant in a closed circuit through the system. The system includes control means for activating and deactivating at least one individual evaporator unit and means for retaining within the portion of the tubing of an individual evaporator unit, when and if it deactivated, an amount of refrigerant which is approximately equal to the amount of refrigerant in the individual evaporator unit when it is activated. As a result, the refrigerant in the system remains balanced regardless of whether individual evaporator units are activated or deactivated.

Abstract: A refrigeration system includes a rack or bank of compressors located in parallel and feeding a common condenser. Liquid refrigerant from the condenser is supplied to a plurality of evaporators located in parallel and feeding a common suction manifold. The suction manifold is connected to the compressors and contains a valve for selectively isolating one or more compressors and evaporators whereby the isolated compressor acts as a satellite compressor and the isolated evaporators are operated at a lower temperature than the other evaporators.

Abstract: A refrigerator comprising a refrigeration cycle which comprises a compressor, condenser, first capillary tube and first cooler connected into a loop, and a quick freezing refrigerant circuit connected in parallel with the first cooler and comprising a second capillary tube and a second cooler connected in series therewith. The refrigerant is passed through the first cooler for usual operation, or alternatively through the quick freezing circuit for quick freezing. During quick freezing, the first cooler is held out of operation, and the refrigerant has its pressure reduced in two steps by the first and second capillary tubes and is evaporated in the second cooler only, giving a low temperature effective for quick freezing. During usual operation, no refrigerant flows into the second cooler, which therefore remains free of frosting. The frost deposited on the second cooler during quick freezing disappears during the usual operation. Thus, the second cooler is substantially free from frost.

Abstract: A low-temperature foods preserving case and a temperature control method therefor, in which a plurality of evaporators, each partitioned by partitioning panels, are arranged correctively in a cooling chamber, for which sequential cooling and defrosting operations are instructed by a timer, so that circulatory passage of the cooling air is formed through said cooling chamber, the foods preserving chamber, and the cooling chamber by means of fans installed in each of partitioned air passages separated by said partitioning panels.

Abstract: The refrigeration apparatus according to the invention has a main refrigeration line comprising a compressor, a condenser which are installed outdoor, and a decompression device, an evaporator and a refrigerant flow rate control valve which are installed indoor, all connected in a loop. The main refrigerant line is provided with an auxiliary refrigerant line that connects the input side of the decompression device in the main refrigerant line with the inlet side of the compressor via a bypass valve. The lowering in the suction pressure of the compressor is detected if it happens, and the pressure is restored by opening the bypass valve by throttling the refrigerant flow rate control valve, so that the compressor may be kept on running.

Abstract: An air-conditioning control system for use in an automotive vehicle comprises a variable capacity compressor having capacity thereof being variable by an external control signal, at least one first cooling unit for cooling a vehicle compartment, and a second cooling unit for cooling a refrigerator. A first valve is arranged between the compressor and the first cooling unit for connecting them to cause same to form a cooling circuit when the first valve is open. A second valve is arranged between the compressor and the second cooling unit for connecting them to cause same to form a refrigerating circuit when the second valve is open. A valve control unit controls opening and closing of the first and second valves.

Abstract: An air conditioner dehumidifier comprising coil portions cooled by a fluid coolant such as by chilled water or refrigerant. As the required air sensible and latent cooling demands and their ratio varies in the conditioned space, the number of operational coil portions and the velocity of the coolant flow through each is controlled, by valves or other means, increasing coolant velocity while reducing the number of operational coil portions and vice-versa, to provide the coil surface area and the coil surface temperature necessary to cause the required degree of dehumidification and the required degree of sensible cooling in the required ratio to maintain comfortable conditions in the conditioned space with low energy consumption at all cooling demands.

Abstract: There is provided a method and apparatus for storing energy and for utilizing the stored energy. The apparatus includes a storage container which holds a phase change energy storage material such as water. A plurality of coils are disposed in the storage container and carry a refrigerant material. At least one evaporator is connected to the coils. A self pumping apparatus is connected to a condensing unit, to the evaporator and to the coils, and is operated by the adiabatic conversion of refrigerant from its liquid state to a vapor plus liquid state. The self pumping apparatus thus moves the refrigerant fluid to the evaporator without the need for additonal energy input. The self pumping apparatus includes a pair of tanks each of which alternately operate as a pumper and as an accumulator during ice melting. During ice freezing, both containers operate as accmulators.

Abstract: A cold drink dispenser and, more particularly a refrigeration system for such a dispenser, is disclosed. The dispenser has a beverage flow path, a first coil or evaporator for prechilling a beverage flowing through the beverage flowpath, and a second or ice bank coil immersed in a liquid bath with the flowpath also immersed in the ice bath. A first modulatable expansion valve (e.g., a pulse modulated solenoid valve) is used to regulate the flow of refrigerant through the first coil and a second modulatable valve is used to regulate the flow of refrigerant through the ice bank coil. A control system (e.g., a microprocessor-based control) monitors certain temperatures and initiates or blocks the flow of refrigerant through one or both of the coils in response to certain pre-established system paramaters so as to insure that the beverage dispensed is below a desired temperature, even under high load operating conditions.

Abstract: A refrigerator comprising a refrigeration cycle which comprises a compressor, condenser, first capillary tube and first cooler connected into a loop, and a quick freezing refrigerant circuit connected in parallel with the first cooler and comprising a second capillary tube and a second cooler connected in series therewith. The refrigerant is passed through the first cooler for usual operation, or alternatively through the quick freezing circuit for quick freezing. During quick freezing, the first cooler is held out of operation, and the refrigerant has its pressure reduced in two steps by the first and second capillary tubes and is evaporated in the second cooler only, giving a low temperature effective for quick freezing. During usual operation, no refrigerant flows into the second cooler, which therefore remains free of frosting. The frost deposited on the second cooler during quick freezing disappears during the usual operation. Thus, the second cooler is substantially free from frost.

Abstract: This application concerns an automobile air conditioning system having two evaporators and one compressor which is alternately activated and deactivated to prevent frost from accumulating on one of the evaporators by way of a refrigerant pressure responsive switch at the outlet of the one evaporator. A one-way check valve is located near the switch and between the evaporators to prevent reverse flowing of refrigerant from the one evaporator to the other evaporator.

Abstract: A cold accumulation type refrigerator having an improved control system for controlling its defrost cycle. The refrigerator includes a main evaporator for producing cold air, a cooling command signal generating device for generating a cooling command signal when a refrigerator compartment is required to be cooled, a clock device for generating a time data, a refrigerating cycle for cooling the main evaporator in accordance with the cooling command signal and the cold-accumulation material in accordance with the time data from the clock device, and a defrost control device for removing frost deposited on the main evaporator. The defrost control device counts cooling operation time of the evaporator in response to the cooling command signal.

Abstract: A cold-accumulation type refrigerator having variable length cycle for cooling by means of the cold-accumulation material. The cycle length is a function of refrigerator load. The refrigerator includes a refrigerating cycle to cool a refrigerator compartment and the cold-accumulation material, a load detecting device, such as a room temperature detecting device, to measure an amount of a load to be cooled, clock counting device to generate a time data, and a control device, such as microcomputer. The control device controls the operation of the refrigerator which operates in a first mode (ordinary cooling operation), a second mode wherein the refrigerator compartments are cooled by means of the cold accumulation material and a third mode wherein the cold accumulation material is cooled. The control device controls the time period for second and third mode operation as a function of load to be cooled.

Abstract: A refrigerating apparatus for individually refrigerating a plurality of chambers by a single compressor is disclosed. The refrigerating apparatus includes a plurality of evaporators which are disposed one in each of the respective chambers, and are coupled with each other in parallel. An electromagnetic valve is coupled to each evaporator in series to control the flow of refrigerant, and an expansion valve such as a capillary tube also is coupled to each evaporator in series, to thereby form a plurality of electromagnetic valve-expansion valve-evaporator combinations. An additional heat exchanger is disposed in the refrigerating circuit in parallel with the parallel electromagnetic valve-expansion valve-evaporator combinations through a valve device. The valve device allows adjustment of the flow of refrigerant to the evaporators and the additional heat exchanger to maintain the chambers at their desired temperature without varying the capacity of the compressor.

Abstract: A single outdoor unit has at least an inverter circuit, a compressor motor, a variable capacity compressor, and an outdoor heat exchanger. A plurality of indoor units each have at least an indoor heat exchanger and an air-conditioning load detector. A distribution unit couples the single outdoor unit to the plurality of indoor units in parallel by liquid-side refrigerant piping and gas-side refrigerant piping, to form a refrigerating cycle of a heat pump type. The liquid-side refrigerant piping includes a motor-operated flow regulating valve and pressure reducer, which are connected in series fashion. A pseudo-refrigerant superheating state detector detects a pseudo-refrigerant overheating state on the basis of the temperature of the refrigerant in the aggregated portion of gas-side refrigerant piping of the distribution unit. A first controller respectively controls the open factors of the motor-operated flow regulating valves.

Abstract: A subcooler is provided in heat exchange relationship with the high pressure liquid refrigerant line flowing to the indoor coil, such that when a low pressure condition is sensed on the low pressure side of the system, the subcooler flashes a portion of the liquid refrigerant to the low pressure side to thereby maintain suction pressure to the compressor, while at the same time subcooling the liquid refrigerant flowing to the fan coil to thereby increase its efficiency.

Abstract: A low-temperature showcase comprises a heat insulated wall, on the top of which an opening for putting-into or taking-out commodities is formed. The inside of the heat insulated wall is divided into an air passage and a storage chamber thereover by a dividing plate which is installed inside this heat insulated wall in a nearly horizontal fashion. The air passage is formed in a manner that the cross-section thereof is of a U-shape, and the storage chamber is formed surrounded by this air passage. At both ends of the air passage, vent ports are formed at the positions facing each other through the opening of the heat insulated wall inbetween. The air passage is divided into two parts by a fan case corresponding to the respective vent ports and a blast fan which can rotate reversibly is supported by this fan case. In each halved air passage, an evaporator is installed in the vicinity of the vent port, and when one of the evaporators is put in cooling operation, the other evaporator is subjected to defrosting.

Abstract: A compartmentalized transport refrigeration system, and method of operating same, in which a host refrigeration unit controls the temperature of the air in a front compartment of a trailer, and a remote evaporator unit controls the temperature of the air in a rear compartment. In order to increase the heating and cooling capacity of the remote evaportor, the host unit is prevented from going into a heating mode in response to predetermined conditions, and more, or all in certain instances, of the discharge gas from the host compressor is made available for the remote evaporator.

Abstract: A refrigerated display case with multiple air curtains and a refrigerating apparatus for refrigerating circulating air. The refrigerating apparatus includes a compressor, a condenser and two evaporators. The suction sides of both evaporators are connected with one another by a first passage line which includes first and second compression device with check valves in series, this line being connected to the compressor through valve devices. The discharge sides of both evaporators are also connected with one another by a second passage line which includes a pair of check valves, this second line being connected to the compressor through valve devices, respectively. The first and second passage lines are connected with one another and connected to the condenser through a valve device whereby both evaporators are parallel or serial connected with one another due to operation of the valve devices to accomplish the refrigerating mode or refrigerating and defrosting mode of the refrigerating means.

Abstract: In the freezing cycle of an air conditioner for an automotive vehicle, first and second evaporators are connected to the inlet of a compressor. The first evaporator cools air to be blown into the passenger compartment of the vehicle, and the second evaporator, provided in the intake system of the vehicle engine, cools air to be taken into the engine. A pressure control valve is provided at the outlet of the second evaporator for controlling the boiling pressure of the refrigerant therein, or alternatively, the compresser may be of variable displacement type, to thereby prevent the compressor from consuming increased power during high speed operation of the engine.

Abstract: The present invention provides a system and method for peak shaving for a conventional air conditioning system. Heat energy is removed from an energy storage medium during periods of low power consumption and then the storage medium is used to absorb heat energy from the refrigerant during periods of peak energy consumption.

Abstract: In a refrigeration system, coolant is allowed to branch from a refrigeration circuit part between the midpoint of the condenser and the outlet of the pressure reducing pipe, and is subjected to pressure reduction by a pressure reducing unit to thereby obtain a cooling effect, the reduced temperature branched coolant being utilized to cool the remaining coolant in a refrigeration circuit part between the outlet of the condenser and the outlet of the pressure reducing pipe, whereby the amount of cooling at that time is controlled so that the flow rate of coolant in the refrigeration circuit is also controlled. The branched coolant is allowed to rejoin the refrigeration circuit part between the midpoint of the pressure reducing pipe and the midpoint of the evaporator, whereby the flow rate of coolant can be maintained suitable. Even if the branched coolant is not completely evaporated prior to recombining, no solution returns to the compressor, which contributes to stabilization of the system operation.

Abstract: This invention is an improved refrigerant-cycle heat pump that requires neither a defrosting means nor a backup heat source. From widely varying outside environments, it pumps heat to heat living spaces or domestic hot water. Liquid refrigerant flows from a receiver through expansion valves into an outside evaporator consisting of a segmented array of plates where heat is absorbed from the atmosphere to evaporate the refrigerant. The resultant gas is compressed by a motor-driven compressor, gives up heat in a condenser, becomes liquid, and returns to the receiver. The segmented evaporator enables the self-governing heat pump system to choose the proper magnitude of evaporator area, in response to its determination of compressor suction pressure or motor power demand, so as to provide a steady refrigerant flow to the compressor and thereby maintain optimum heat pumping despite extreme excursions of outside temperature.

Abstract: Apparatus for controlling an automotive air conditioner comprises first and second air distribution passageways in which blower fans are provided to direct air streams respectively therethrough to first and second areas of a passenger compartment. First and second evaporators located in the first and second passageways respectively are supplied with working fluid to transfer thermal energy from the first and second air streams to the supplied working fluid. A control unit is responsive to the temperatures of the first and second areas and temperature settings for estimating thermal energies of the first and second air streams to be delivered from the passageways and derives first and second control signals from the estimated thermal energies to control actuators which individually regulate the flow rates of the working fluid supplied to the first and second evaporators.

Abstract: An electric refrigerator is designed to comprise a freezing chamber provided with a gas duct for drawing off a cooling gas from the freezing chamber and refluxing the cooling gas thereto. A main freezing evaporator is provided in the gas duct to freeze foodstuff stored in the freezing chamber by circulating a cooling gas through the freezing chamber and gas duct. The refrigerator also comprises an auxiliary shelf-shaped freezing evaporator for directly freezing the foodstuff placed thereon in all directions. A damper unit involved in the refrigerator mechanically operates a gas circulation valve provided in the gas duct. During the defrosting mode, the freezing evaporators are rendered inoperative, and the main freezing evaporator is heated to remove frost deposited thereon. During this interval, the damper unit causes the gas circulation valve to close the gas duct.

Abstract: A vapor generating and recovering apparatus for vaporizing a liquid and condensing a vapor, the apparatus including a container having a liquid therein with a heating and cooling system in heat transfer relation with the liquid and vapor in the container. The heating and cooling system includes means to vaporize the liquid; means to condense the vaporized liquid; and, means to compress a refrigerant. The means to compress the refrigerant is in fluid communication on its high pressure side with the means to vaporize a liquid or heat a liquid and on its low pressure side with the means to condense or cool a liquid. The heating and cooling system further includes a complementary condenser system on the high pressure side of the means to compress a refrigerant, discharging its heat external to said apparatus and pump down valve means selectively closeable so that refrigerant can be pumped out of the means to compress a refrigerant.

Abstract: A refrigerator with a freezing chamber and a cold chamber, wherein the freezing chamber is cooled rapidly by a main, fan-type, cooling system and a secondary, direct-type, cooling system. The secondary cooling system includes a box-like cooler having a projecting plate for placing food products thereon to provide uniform cooling within the freezing chamber. The refrigerator compressor is controlled in accordance with the temperature of the freezing chamber so as to be efficiently operated in the freezing cycle. Gas coolant is directed via control valves in accordance with the temperature of the freezing and cold chambers.

Abstract: A refrigerator in which a refrigerator evaporator and first freezer evaporator are serially connected to a condenser and compressor. A first bypass path is defined in parallel with the refrigerator evaporator for supplying refrigerant only to the first freezer evaporator and a second bypass path including a second freezer evaporator likewise defined in parallel with the refrigerator evaporator for quickly reducing the freezer temperature. A differential pressure regulator valve is connected between the condenser and the refrigerator evaporator.

Abstract: Disclosed herein is a device that comprises a refrigeration plant with two distinct evaporators, one parallel with the other, which can be supplied separately to suit the operating cycle of the dry cleaning machine on which the device is mounted and are housed in a corresponding first and a corresponding second jacket.The first jacket is placed in a closed circuit through which passes a forced circulation of liquid and in which is provided the nest of tubes belonging to the condenser mounted in the closed drying circuit of the machine. Heat is given to the said liquid by the solvent vapor and water which, as they pass across the condenser, are cooled and condensed, and the liquid is cooled by the evaporator housed in the first jacket.

Abstract: A refrigerating apparatus comprises two refrigerant circuits connected in a parallel fashion which include a common condenser. An evaporating temperature in an evaporator of one refrigerant circuit is set to a relatively high temperature compared with that of an evaporator of the other refrigerant circuit, so that a two-temperature evaporation type refrigerating apparatus is formed and a compressor of one refrigerant circuit can be intermittently driven for each predetermined time period in a forced manner. In a defrosting mode, the condenser is made to operate as an evaporator, whereby the evaporator included in the other refrigerant circuit is defrosted.

Abstract: The present refrigeration apparatus includes a single condenser and compressor, two evaporators, and more particularly an electronically controlled valve system that delivers refrigerant to one evaporator in preference to the other, but will cause the valve system to deliver refrigerant to the other evaporator after a predetermined amount of time.