Abstract: The object of the present invention is to provide an expansion valve unit which prevents a temperature-sensing error from occurring due to transmission of a temperature lowered by the expansion of the refrigerant to a temperature-sensing chamber.

Abstract: A combination thermally responsive refrigerant expansion valve with integral electrically operated inlet shutoff valve having an inlet shutoff valve seat surrounded by a flow diffuser which eliminates undesirable flow noise. In the preferred embodiment the diffuser comprises a plurality of radially extending flow channels formed adjacent the inlet shutoff valve seat integrally in a one-piece valve seat member.

Abstract: A heat exchanger such as an evaporator for a temperature control system includes an input port with an orifice through which a refrigerant enters the heat exchanger. The heat exchanger includes a plurality of plates and a tilted deflection surface near the input port. High-pressure refrigerant entering through the input port impinges on the tilted deflection surface and is deflected by the deflection surface onto the plates. The tilt angle of the deflection surface is selected such that the refrigerant is evenly distributed over the plates resulting in even and highly efficient heat transfer. The heat exchanger can be used as the evaporator in a refrigeration system used to control temperature in a workpiece chuck for supporting a flat workpiece such as a semiconductor wafer during processing and testing. In particular, the heat exchanger can be used to control the temperature of a fluid which is circulated through the chuck to control the temperature of the workpiece and/or the chuck itself.

Abstract: A refrigerating cycle is capable of performing both an operation in which the maximum cooling power is desired to be unleashed and an operation in which the most excellent performance coefficient is attained.

Abstract: A device for reinforcing condensation, especially a device being disposed between a compressor and an expansion valve in a condensation system, comprises a front pipe, at least two divided flow pipes, a plurality of capillary tubes, at least a combining pipe, and a rear pipe. The front pipe is connected to a heat exchange pipe in the condensation system. The divided flow pipes are joined to the front pipe and each divided flow pipe has a diameter thereof smaller than that of the front pipe. The capillary tubes are divided into a plurality of groups and each group has two or more of the capillary tubes. The capillary tubes at an end thereof connect with the divided flow pipes and the diameter of the respective capillary tube is smaller than that the diameter of the respective divided flow pipe. The combining pipe at an end thereof connects with the other end of each capillary tube.

Abstract: In an ejector cycle system using carbon dioxide as refrigerant, an ejector decompresses and expands refrigerant from a radiator to suck gas refrigerant evaporated in an evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into a compressor. Because refrigerant is decompressed and expanded in a super-critical area, a pressure difference during the decompression operation becomes larger, and a specific enthalpy difference becomes larger. Accordingly, energy converting efficiency in the ejector becomes higher, and efficiency of the ejector cycle system is improved.

Abstract: A thermal expansion valve 100 comprises a square column shaped valve body 110, and the valve body 110 contains a first passage 120 with a bottom to which the refrigerant is introduced, a valve chamber 122 formed near the bottom of the passage, a second refrigerant passage 126 traveling toward the evaporator, and a third refrigerant passage 128 returning from the evaporator. A valve means 130 equipped within the valve chamber is fixed to the working rod 132 and operated by a power element 160. The working rod 132 comprises a small-diameter portion 135, and the valve means 130 is fixed by a welding process W1 thereto with a valve seat 200 equipped in advance. The valve seat member 200 is press fit using the working rod 132 to a hole 116 formed to the valve body.

Abstract: A combined cooling and heating system having a simple design of a combined cooling and heat pump plant, especially for the heating and cooling of the passenger cells of motor vehicles. The concept of the invention is that the combined cooling and heat pump plant has a decompression device that fulfills the functions of a decompression device and a mode switch. The advantage of the invention is that dependent on the direction of flow, and thus the operational mode of the device, the decompression function and the blocking function, or the pressure relief function are realized by one component, the decompression device.

Abstract: A two-stage refrigeration system includes an intermediate slurry tank for receiving and storing a refrigerant vapor and a slurry of solid sublimatable refrigerant particles in a liquid. The intermediate slurry tank has a first outlet for outflow of the slurry from the tank, a second outlet for outflow of the refrigerant vapor, a first inlet for receiving at least the liquid, and a second inlet for receiving the refrigerant. The refrigeration system also includes a compression system having a first low pressure inlet and second intermediate pressure inlet, and having a high pressure outlet. A conduit connects the second outlet of the intermediate slurry tank to the intermediate pressure inlet of the compression system so as to compress the vapor with less energy than would be needed to compress low pressure refrigerant vapor.

Abstract: This invention relates to refrigerating or air conditioning system comprising at least one exchanger (2, 3). The system uses a refrigerant fluid according to a thermodynamic cycle comprising at least one liquid-vapor expansion phase. According to the invention, the liquid-vapor expansion phase is created by means of a diphasic turbine (4b) that actuates a ventilator (5b), causing air to circulate on said exchanger (3).

Abstract: Disclosed is a fixed orifice expansion device for use in connection with couplings, such as refrigerant couplings. The novel device includes a body having first and second ends, and an orifice therethrough. At least one end of the body includes a sealing mechanism for sealing the device within a bore of a cooperative coupling or the like, while the opposing end includes means for installing the body within the cooperative coupling. By use of the disclosed expansion device, a service valve for refrigerant expansion may be accomplished with three standard ARI fittings.

Abstract: System and method for reducing temperature variation among heat dissipating components in a multi-component computer system. In this respect, component temperatures are controlled to remain relatively constant (approximately within 5° C.) with respect to other components, while allowing for multiple fluctuating heat loads between components. A refrigeration system possessing a variable speed compressor or a constant speed compressor is utilized to control the flow of refrigerant through the refrigeration system. The temperature variation among components is reduced by independently metering the mass flow rate of the refrigerant flowing into each component to compensate for the amount of heat load on each component. In this respect, the mass flow rate of the refrigerant entering into each of the evaporators is metered by valves located upstream from each of the evaporators.

Abstract: A shut-off valve for pressurized fluids in an air cooling/heating apparatus that includes at least one condenser and at least one fluid evaporator communicating with each other by a pipe. The valve includes two ducts each containing a restrictor coaxially formed with a capillary designed to cause rapid expansion of the fluid when it emerges from the capillary, thus allowing expansion of the fluid in either the heating or cooling mode. The valve further includes a duct for sampling the pressurized fluid before expansion during operation in either the heating or cooling mode.

Abstract: A variable restrict valve is disposed at the upstream side of a refrigerant flow, a fixed restrictor is disposed at the downstream side of the variable restrict valve, an intermediate space is provided between the variable restrict valve and the fixed restrictor, a passage sectional area of the intermediate space is set to be larger than the fixed restrictor and passage length L of the intermediate space is set to be larger than a predetermined length required when the flow of refrigerant injected from the variable restrict valve expands more than the passage sectional area of the fixed restrictor.

Abstract: Heat exchange is performed between a discharge side refrigerant and a suction side refrigerant also at the time of a heating operation. By this, a liquid phase refrigerant containing lubricating oil in the suction side refrigerant is heated by the discharge side refrigerant, and the liquid phase refrigerant is vaporized also at the time of the heating operation, so that the amount of the liquid phase refrigerant sucked into a compressor is decreased. Accordingly, the increase of compression work of the compressor is prevented, and an opening area of an oil return hole can be expanded to such a degree that an optimum amount of lubricating oil is attained at the time of the heating operation.

Abstract: The object of this invention is to provide a cooling apparatus with low compression load. This cooling apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using the phase change of the refrigerant. In an embodiment, the apparatus (100) is designed such that the refrigerant from the outdoor unit (160) passes through a heat exchanging and evaporating unit (110) prior to flowing into the expansion unit (120), with the refrigerant from the evaporating unit (110) partially flowing into a sub-expansion unit (130) to become low temperature, low pressure bypassed refrigerant.

Abstract: A heat transmission retardant member 140 which is a cylinder-shaped resin tube made of nylon or polyacetals is mounted between an adsorbent 40 and an inner wall of a hollow portion of a heat-sensing driven member 100 with a space 140′ between said inner wall. The hollow portion of said heat-sensing driven member 100 includes said adsorbent 40, said heat transmission retardant member 140 made of resin, and said space 140′. Said heat transmission retardant member 140 comprises plural protrusions, and by positioning said protrusions to contact said inner wall, said space 140′ is formed.

Abstract: In an expansion valve of a refrigerant cycle, only by covering a diaphragm case and a part of a body case using a single vibration-proof member made of a rubber material, vibration in the diaphragm case can be effectively restricted. Because it is unnecessary to cover all surface of the expansion valve, the dimension of the vibration-proof member can be greatly reduced, and pipe connecting/removing operation in the expansion valve can be readily performed. Accordingly, a material cost of the vibration-proof member can be reduced, while noise caused due to the vibration of the expansion valve can be effectively reduced.

Abstract: A heat transmission retardant member 140 is formed of a cup-like shaped resin material utilizing nylon or polyacetals, comprising a collar 141 formed to the outside of the upper end thereof, and a thick-walled cylinder portion 143 having at the lower end thereof a tapered portion 142. Said retardant member 140 is positioned so that the upper end contacts a support member 82′, said collar 141 is supported by the inner surface of a housing 81, the outer surface of said cylinder portion 143 contacts the inner surface of said housing 81, and the end of said tapered portion 142 is inserted to a second hole 72 and contacting the outer surface of a heat-sensing driven member 100 and further positioned within a lower chamber 85 defined by a diaphragm 82.

Abstract: A vapor compression refrigeration system includes an evaporator, a compressor, and a condenser interconnected in a closed-loop system. In one embodiment, a multifunctional valve is configured to receive a liquefied heat transfer fluid from the condenser and a hot vapor from the compressor. A saturated vapor line connects the outlet of the multifunctional valve to the inlet of the evaporator and is sized so as to substantially convert the heat transfer fluid exiting the multifunctional valve into a saturated vapor prior to delivery to the evaporator. The multifunctional valve regulates the flow of heat transfer fluid through the valve by monitoring the temperature of the heat transfer fluid returning to the compressor through a suction line coupling the outlet of the evaporator to the inlet of the compressor.

Abstract: A condenser includes a refrigerant inlet, a refrigerant outlet, a core portion having a refrigerant passage for introducing refrigerant from the refrigerant inlet to the refrigerant outlet while condensing the refrigerant, and decompressing means provided at a part of the refrigerant passage, the decompressing means decompressing a refrigerant pressure. The refrigerant passage located at an upstream side of the decompressing means condensates at least a part of high-pressure gaseous refrigerant into a liquified refrigerant. The decompressing means decompresses the liquified refrigerant into a low-pressure gaseous refrigerant. The refrigerant passage located at a downstream side of the decompressing means re-condensates the low-pressure gaseous refrigerant.

Abstract: An air conditioner arrangement including an outer air conditioner. The air conditioner includes a compressor for compressing a refrigerant and connections for transporting the refrigerant to at least two indoor air conditioners for heat transfer. Between the compressor and each respective indoor air conditioners is provided a main injection tube, and an expansion chamber is connected to the main injection tube. The main injection tube is inserted into the expansion chamber. The expansion chamber has an inlet which is connected with a common cycling tube. When one or more of the indoor air conditioners is shut off or stopped because the temperature in one of the rooms have reached a preset degree, the compressor can divert excess refrigerant to other indoor air conditioners that are still operating, so that the other rooms can quickly reach their preset temperature or comfort zone.

Abstract: A condenser includes a refrigerant inlet, a refrigerant outlet, a core portion having a refrigerant passage for introducing refrigerant from the refrigerant inlet to the refrigerant outlet while condensing the refrigerant, and decompressing means provided at a part of the refrigerant passage, the decompressing means decompressing a refrigerant pressure. The refrigerant passage located at an upstream side of the decompressing means condensates at least a part of high-pressure gaseous refrigerant into a liquified refrigerant. The decompressing means decompresses the liquified refrigerant into a low-pressure gaseous refrigerant. The refrigerant passage located at a downstream side of the decompressing means re-condensates the low-pressure gaseous refrigerant.

Abstract: A valve assembly for controlling the flow of refrigerant and coolant through an HVAC system is provided. The valve assembly includes a refrigerant housing defining a refrigerant conduit with a refrigerant inlet and a refrigerant outlet. A refrigerant valve is disposed within the refrigerant conduit for controlling the flow of refrigerant between the refrigerant inlet and the refrigerant outlet. The assembly also includes a coolant housing defining a coolant conduit with a coolant inlet and a coolant outlet. A coolant valve is disposed within the coolant conduit for controlling the flow of coolant between the coolant inlet and the coolant outlet. An actuator assembly is coupled to the refrigerant and the coolant valves for simultaneously actuating the valves.

Abstract: The invention relates to a distributing/collecting tank (distributor/header case) of aluminum or an aluminum alloy of an at least dual flow (double-flow) brazed evaporator of a motor vehicle air conditioning equipment, wherein the case comprises a tube bottom and a cap (28), which supplement each other at least in the direction of the narrow cross-section to the case, and in its longitudinal extension direction corresponding to the number of flows at least a longitudinal partition, wherein at least one case wall on the front side is formed by a separate end piece (62) being in close contact to each adjacent longitudinal partition and at least one case wall is provided with the refrigerant inlet (14).

Abstract: A plurality of heat transfer tubes are disposed at certain intervals, in-tube operating fluid (such as coolant) passes therethrough, and a plurality of small-gage wires are used as a heating fin. One small-gage wire is wound at a pair of heat transfer tubes 1a and 1c in a spiral manner, and another small-gage wire is wound at a pair of heat transfer tubes 1b and 1c in the spiral manner, and still another small-gage wire is wound at a pair of heat transfer tubes 1b and 1d in the spiral manner. Thereby, while higher heat transfer coefficient can be achieved, and a heating surface area is ensured, clogging can be avoided even when moisture in air condenses on a surface of a heat exchanger. As a result, it is possible to realize a high-performance and compact heat exchanger used for air conditioning.

Abstract: A filter/drier has, in one embodiment, an expansion valve block formed integrally with a header welded to a desiccant-containing canister. The block has a bore into which is received a precalibrated thermally responsive cartridge valve after the welding operations to prevent exposure of the cartridge valve to the elevated temperatures experienced during welding. In another embodiment, a valve block has one end of a first conduit welded to the high pressure inlet port and one end of a second conduit welded to the low pressure discharge port. A cartridge type thermally responsive precalibrated expansion valve is assembled in a block bore after welding is completed to prevent the expansion valve from being exposed to elevate temperatures experienced during welding.

Abstract: The invention concerns a refrigerating fluid cycle comprising the standard compressor, condenser, liquid/gas separating reservoir, expansion device and evaporator. The invention is characterized in that a pre-expansion device is placed between the condenser and the reservoir, so as to reduce the fluid pressure until it reaches its saturation vapor pressure. The reservoir can thus contain a variable amount of liquid to compensate the fluid losses in the cycle by maintaining the sub-cooling temperature constant thereby enabling the heat load to be absorbed by the condenser.

Abstract: A pressure reducing assembly is provided for managing refrigerant flow in a reversible HVAC system. Refrigerant lines from the system heat exchangers connect to bi-directional ports of a pressure reducing assembly which converts the high pressure refrigerant flowing from one heat exchanger into pressure reduced refrigerant that flows to the other heat exchanger. The pressure reducing assembly converts bi-directional refrigerant flow from the heat exchangers into unidirectional refrigerant flow through a pressure reducing device. Refrigerant emitted from the pressure reducing device flows out of the pressure reducing assembly to the other heat exchanger. The invention simplifies the interconnection of reversible HVAC systems by eliminating the complex plumbing and extra valves associated with conventional systems.

Abstract: The evaporator comprises a) a chamber (12) made of a porous material with an inlet for a heat exchanging fluid in liquid form, b) a shell (9) in which is located said chamber (12) to define around it, a chamber (15) for collecting said fluid in vapor form, said shell (9) having an outlet by which the vapor collected in said chamber (15) is evacuated. It further comprises a tube (22) which extends through the whole internal space of the chamber (12) with a porous wall, from one end (24) of the tube constituting the chamber (12) inlet for the heat exchanging fluid, said tube (22) being pierced over its whole length with holes (33) for injecting the heat exchanging liquid into the chamber (12) wall.

Abstract: In a heat transfer tube for a zeotropic refrigerant mixture, the inner surface of the tube in which the zeotropic refrigerant mixture flows is formed with grooves having cross portions where the grooves intersect with each other, or the inner surface of the tube is formed with a plurality of independent projections. Thus, concentration boundary layers generated in the zeotropic refrigerant mixture are stirred to reduce the thickness of the concentration boundary layers, thereby decreasing the diffusion resistance and promoting the stirring effect. Consequently, there can be provided a heat transfer tube for a zeotropic refrigerant mixture which exhibits a high heat transfer performance, and a heat exchanger of a cross-fin tube type, a refrigerator and an air conditioner which include such heat transfer tubes.

Abstract: A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refrigerant, a junction is provided for joining an end of a capillary tube forming an expansion device to the piping through which the refrigerant flows. The junction has a slope defined by the inside diameter thereof, which gradually decreases from the side of the junction that joins the piping to the side of the junction that joined the capillary tube. An end portion of the capillary tube projects into the junction at the piping side. The projecting end of the capillary tube is opened obliquely to the axial line of the capillary tube. A hole is formed in the peripheral wall of the projecting end of the capillary tube.

Abstract: A refrigerant evaporator constructed by laminating a plurality of tube elements and a flat tube element. A second refrigerant passage in the flat tube element is disposed at a position being closest to a refrigerant outlet pipe. In the second refrigerant passage, some ribs are formed such that the ribs protrude from a flat plate connected to a metal plate to construct the flat tube element. The second refrigerant passage is partitioned into several small refrigerant passages. By this, the refrigerant flow area of the second refrigerant passage is smaller than that of the other refrigerant passages. That is, the refrigerant flow resistance of the second refrigerant passage is larger than that of other refrigerant passages. Accordingly, the refrigerant is prevented from flowing into the second refrigerant passage of the flat tube element.

Abstract: A universal housing body for a refrigeration expansion device including a movable orifice piston. The body is adapted for interchangeable use with a piston of a first variety having a radial boss portion extending along a first axial distance, L.sub.1, from a forward boss end having an annular sealing surface of a first maximum sealing diameter, d.sub.max1, to a rearward boss end, and a piston of a second variety having a radial boss portion and an annular seal member having a forward surface defining with a rearward end of the boss portion a second axial distance, L.sub.2, therebetween greater than the first axial distance L.sub.1, and having a second minimum sealing diameter, d.sub.min2, greater than d.sub.min1 and less than d.sub.max1. The housing body has an internal fluid passageway extending from a forward end to a rearward end which couplable with a flange end of an associated adapter. An annular valve seat, having an inner diametric extent, d.sub.i, intermediate d.sub.min2 and d.sub.

Abstract: An evaporator (10), e.g. in a domestic refrigerator, for refrigerating air in a space for goods, which space is confined against ambient atmosphere (14) by a wall (16), is constituted by a tubular element (18), through which a refrigerant flows from a capillary pipe (20), which is connected to the element at a joint (28) at one end of the element. The element (18) comprises an inner tube (24), through which the refrigerant flows, outside which inner tube an outer tube (26) is arranged, the outer tube (26) extending through the wall (16) and the joint (28) being arranged between the capillary pipe (20) and the inner tube (24) inside the wall (16) in a chamber (38) formed in the outer tube (26). A sealing means (36) arranged between the capillary tube (26) prevents humidity of the ambient atmosphere (14) from forcing its way into the chamber (38).

Abstract: A shell and tube type evaporator using a refrigerant and shell fluid and including a vertically positioned shell having an upper and lower end and substantially parallel tubes longitudinally disposed within the shell. The shell has inlet means near its lower end and outlet means near its upper end for passing the refrigerant through the tubes. The shell also has inlet and outlet means for passing the shell fluid through the shell. Preferably the refrigerant is ammonia and shell fluid is brine.

Abstract: A multipass evaporator for an air conditioner includes a pair of spaced-apart and parallel headers, a plurality of microchannels extending between and connected to the headers, at least one throttling microchannel extending between and connected to the headers, and at least two baffles provided within the headers. The baffles are located in the headers to divide the plurality of microchannels and the throttling microchannel into at least three passes. The three passes include a first pass, a last pass, and at least one intermediate pass between the first pass and the last pass. The first pass includes the throttling microchannel which provides a desired restriction to obtain constant enthalpy expansion so that no restriction device is required between a condenser and the evaporator.

Abstract: A heat exchanger, as mounted on the outdoor unit or indoor unit of an air conditioner system, is formed with a plurality of passages for a refrigerant. To this heat exchanger, there is connected a refrigerant distributor for distributing the refrigerant to the individual passages or for collecting the distributed refrigerant. This refrigerant distributor is constructed by soldering two corrugated plate members to form a refrigerant conduit between the corrugations. Before these plate members are soldered, the refrigerant conduit is either partially constricted to form a throttle portion or partially bulged to form a filter portion by fitting a filter member in the bulging portion when the plate members are soldered. Thus, the refrigerant distributor can set the diversion of the refrigerant to a predetermined ratio by the simple device while reducing the space and lowering the cost.

Abstract: A thermal expansion valve for automotive coolant systems which is significantly more compact than previously developed expansion values. The housing of the expansion valve is divided into a first housing formed in a cylindrical shape with a bottom and a second housing formed in a columnar shape. The first housing is fit into the second housing, and both are integrally connected to each other. A temperature sensing mechanism having a temperature sensing chamber and an expansion mechanism for adjusting an opening degree of a throttle passage in accordance with an evaporator outlet temperature sensed by the temperature sensing means are disposed in the second housing. First and fourth joint portions connected to inlet and outlet refrigerant pipes of the evaporator, respectively, are at the bottom of the first housing.

Abstract: A solenoid operated valve for supplying a liquid refrigerant has an inlet port, or outlet port and a valve port therebetween, the outlet port having a restricted opening equal to or smaller than the opening of the valve port, a capillary tube in the outlet port, and a passageway between the valve port and the outlet port having a small volume capable of substantially preventing expansion of liquid refrigerant.

Abstract: A refrigeration system including a flow control expansion valve. A valve body defines a valve inlet for accepting refrigerant and a valve outlet for delivering refrigerant that has passed through the valve body. A metering head defines first and second passageways for fluid passing through the valve body. A cylindrical sleeve is mounted for controlled movement within the valve body and including a center passageway which in combination with the first and second passageways conveys fluid through the valve body to the valve outlet. A spring urges the sleeve in a direction relative the metering head to maintain both the first and second passageways in fluid communication with the center passageway of the sleeve.

Abstract: To prevent refrigerant leakage when operating in a metering mode, a refrigerant expansion device, designed to selectively operate in either the meteting or bypass mode of operation, has a cylindrical ring installed to tightly hold the meteting piston in its metering position so as to prevent leakage ofrefrigerant therearound.

Abstract: A refrigerant evaporator 5 constructed by a refrigerant-refrigerant heat exchanger section 32 having an inflow passageway 38 and an outflow passageway 39, and a refrigerant-air heat exchanger section 34 having a bottom tank 48, a top tank 49 and evaporating passageways 100 connecting the tanks 48 and 49 with each other. An orifice 33 is arranged between the inflow passageway 38 of the refrigerant-air heat exchanger section 34 and the inlet tank 48 of the refrigerant-air heat exchanger section 34. The refrigerant in the bottom tank 48 is introduced into all of the evaporating passageways 100, so as to obtain a single, upward direction of flow of the refrigerant in the evaporating passageways 100.

Abstract: Refrigeration apparatus and method generally include a compressor for compressing refrigerant gas to a liquid, an evaporator for evaporating refrigerant liquid to refrigerant gas and cooling in atmosphere adjacent the evaporator and a condenser for rejecting the heat of compression of hot refrigerant vapor to the atmosphere adjacent to the condenser. First and second chambers are provided separated by free-floating piston for alternately condensing refrigerant gas in the first chamber and storing refrigerant livid in the second chamber, and condensing refrigerant gas in the second chamber and storing refrigerant livid in the first chamber.

Abstract: An amount of refrigerant fed to an evaporator 16 is adjusted by an open degree of an expansion valve 6 in accordance to a refrigerant pressure and a refrigerant temperature of an outlet side of the evaporator 16. The evaporator 16 has an evaporation part which includes a refrigerant passage 26 connecting parallel with an inflow passage 22 and an outflow passage 24 and further having a cooled passage 28 which forms a first throttle 30 at the downstream thereof and a cooling passage 32. The cooled passage 28 links the expansion valve 6 and the inflow passage 22. The cooling passage 32 is connected to the outflow passage 24 and leads refrigerant to an outlet. A heat exchange part 20 is provided to be able to of performing heat exchange between the cooled passage 28 and the cooling passage 32. A second throttle is set in a bypass passage 38 which links the upstream side of the cooled passage 28 and the downstream side of the first throttle 30.

Abstract: The present invention is directed to an integral bi-directional flow control valve. The valve includes a housing that defines a passageway for the flow of a fluid in a first direction and a second direction. The housing defines a phase change chamber in the passageway. A first restrictor having a first bore is positioned in the passageway adjacent the phase change chamber. The bore has a volume less than the volume of the chamber. As the fluid flows through the bore in the first direction into the chamber, the fluid changes from a liquid to a gas as it exits the bore. The gas continues to flow through the passageway. A second restrictor having a second bore is positioned in the passageway adjacent the chamber and opposed to the first restrictor. The second restrictor includes a second bore having a volume less than the volume of the chamber. The second bore can be the same size as the first bore or a different size depending on the application.

Abstract: A vapor compression system having a mixing and distributing unit mounted in the refrigerant circuit between the system expansion valve and evaporator. The unit includes a mixing vane and a nozzle for directing a uniformly distributed two phase mixture into the evaporator.

Abstract: A refrigerant evaporator for a refrigeration cycle which separates a refrigerant of a two-phase gas and liquid state introduced from a pressure reduction means into a liquid refrigerant and a gas refrigerant by a gas and liquid separation means and distributes at least the liquid refrigerant to a plurality of refrigerant passageways of a heat exchange portion by a distribution means such as a tank. The distributed refrigerant has a single phase such as a liquid refrigerant and therefore the distribution is uniformly and equally carried out, the efficiency of the evaporator becomes higher, and the size can be reduced.

Abstract: A vapour compression system, in which the pressure and flow rate of refrigerant in components of the system to control and to optimize use of heat-transfer surfaces and to minimize power consumption, comprises a compressor 1, a condenser 5, a two-section evaporator 15, and a needle float valve 13 for maintaining a pressure differential between the condenser and the evaporator. The two section evaporator comprises a first section 17 which receives refrigerant from the condenser and which partially evaporates it to discharge two-phase refrigerant into a reservoir 23 in which liquid refrigerant is collected and from which low pressure refrigerant vapour is supplied to the compressor, and a second section 19 which receives liquid refrigerant from the reservoir and evaporates it at least partially.

Abstract: A thermodynamic system, such as a vapor compression refrigeration system, in which a binary expansion valve allows pulsed high velocity flow to an evaporator through an isentropic flow nozzle wherein the valve is controlled in response to evaporator pressure.