Abstract: A refrigeration system includes a compressor; a condenser; an expansion valve having a body with an expansion valve inlet and an expansion valve outlet; an evaporator all arranged in a refrigeration circuit; and a controller. The expansion valve body has a pathway comprising an inlet body capillary tube flow-connected to the expansion valve inlet, and an outlet body capillary tube flow-connected to the expansion valve outlet. The expansion valve comprises a solenoid operated valve element that is selectively positionable between the inlet body capillary tube outlet and the outlet body capillary tube inlet. The controller digitally controls the valve element to position the valve element either to allow flow through the pathway in an open position or to block flow through the pathway in a closed position.

Abstract: An economizer is provided in a multistage compression refrigeration system including a refrigerant circuit in which a multistage compressor, a condenser, a multistage expansion mechanism, and an evaporator are sequentially connected. The economizer includes: a tank having an introducing portion for introducing a refrigerant of the refrigerant circuit, a liquid outlet for guiding a liquid refrigerant into the evaporator, and a gas outlet for guiding a gas refrigerant into a medium pressure portion of the multistage compressor; and a float expansion valve, which forms part of the multistage expansion mechanism and is attached to the liquid outlet, and whose throttle amount is adjusted according to a level of the liquid refrigerant in the tank. Multiple ones of the liquid outlet and multiple ones of are provided.

Abstract: A climate control system is provided and may include a compressor, a first heat exchanger, a second heat exchanger, and a coolant flow path. The compressor may include a suction port, a first discharge port and a second discharge port. The first heat exchanger may be in fluid communication with the first discharge port. The second heat exchanger may be in fluid communication with the second discharge port. The coolant flow path may be in fluid communication with the first heat exchanger and the second heat exchanger.

Abstract: A sealed system for an appliance is provided. The sealed system includes a capillary tube for directing refrigerant from a condenser of the sealed system to an evaporator of the sealed system. A suction side conduit assembly is mounted to the capillary tube. The suction side conduit assembly includes multiple conduits or passages for directing refrigerant from the evaporator to a compressor of the sealed system. The suction side conduit assembly can assist with transferring heat from the refrigerant within the capillary tube without substantially reducing a pressure of the refrigerant within the suction side conduit assembly.

Abstract: A refrigerant circuit using a non-azeotropic mixture of hydrocarbons refrigerants comprises a compressor, a condenser, an expansion device, a first evaporator downstream the expansion device, a second evaporator downstream the first evaporator, a first heat exchanger to cause heat exchange between refrigerant downstream the condenser and upstream the first evaporator, on one side, and refrigerant downstream the first evaporator and upstream the second evaporator, on the other side, and a second heat exchanger to cause heat exchange between refrigerant downstream the condenser and upstream the first heat exchanger, on one side, and refrigerant downstream the second evaporator and upstream the compressor, on the other side, the expansion device having a capillary tube as part of both heat exchangers as a side of exchangers, the capillary tube being parallel to and in contact with a tube of the circuit or it is wrapped around such tube.

Abstract: An outdoor unit of an air-conditioner and two-pipe and three-pipe air-conditioning systems having the same are provided. The outdoor unit includes a compressor defining an outlet and an inlet; a first four-way valve defining a first valve communicated with the outlet, second and third ports communicated with the inlet; a second four-way valve defining second and third ports communicated with the inlet; an outdoor heat exchanger defining a first refrigerant valve Communicated with the fourth port of the first four-way valve; a first gas pipe defining a first end connected with the second and third ports of the first and second four-way valves and, the inlet; a second gas pipe defining a first end connected with the fourth port of the second four-way valve; a third gas pipe defining a first end connected with the outlet and a second end connected with the first port of the second four-way valve.

Abstract: A heat pump apparatus (100) includes an evaporator (10), an electrochemical compressor (11), a condenser (16), a refrigerant delivery path (18), and a non-condensable gas return path (28). The non-condensable gas return path (28) is provided separately from the refrigerant delivery path (18), and is configured to communicate a discharge-side high-pressure space of the electrochemical compressor (11) with a suction-side low-pressure space of the electrochemical compressor (11) so as to return a non-condensable gas from the high-pressure space to the low-pressure space. The non-condensable gas is, for example, hydrogen gas.

Abstract: An energy recovery apparatus for use in a refrigeration system, comprises an intake port, a nozzle, a turbine and a discharge port. The intake port is adapted to be in fluid communication with a refrigerant cooler of a refrigeration system. The nozzle comprises a fluid passageway. The nozzle is configured to reduce temperature and pressure of refrigerant discharged from the refrigerant cooler and increase velocity of the refrigerant as it passes through the fluid passageway. The turbine is positioned relative to the nozzle and configured to be driven by refrigerant discharged from the fluid passageway. The discharge port is downstream of the turbine and is configured to be in fluid communication with an evaporator of the refrigeration system.

Abstract: A cooling device capable of improving constancy of the ability of a coolant to cool a heat source is provided. A cooling device-cooling an HV device includes a heat exchanger performing heat exchange between the coolant and air-conditioning air; a cooling unit connected in parallel with the heat exchanger and cooling the HV device using the coolant; an expansion valve provided on a downstream side of the heat exchanger and being regulated in opening degree in accordance with a temperature of the coolant between the heat exchanger and the expansion valve and regulating pressure of the coolant flowing through the heat exchanger; and an expansion valve provided on a downstream side of the cooling unit and being regulated in opening degree in accordance with a temperature of the coolant between the cooling unit and the expansion valve and regulating the pressure of the coolant flowing through the cooling unit.

Abstract: A double-pipe heat exchanger capable of achieving a compact configuration and suppressing a liquid refrigerant contained in a gas-liquid two-phase refrigerant from flowing out from an inner pipe so as to prevent generation of a liquid-back phenomenon is provided. A double-pipe heat exchanger includes an outer pipe through which a high pressure liquid refrigerant flows, and an inner pipe having an inlet side end into which a low pressure gas-liquid two-phase refrigerant obtained by reducing pressure of the high pressure liquid refrigerant flows, and an outlet side end connected to a suction side part of a compressor. The double-pipe heat exchanger includes a plurality of vertical pipes arranged in the up and down direction, and a curve pipe connecting ends of the plurality of vertical pipe), the outlet side end of the inner pipe is provided in an upper end of one vertical pipe, and the inlet side end of the inner pipe is provided in an upper end of the other vertical pipe.

Abstract: Disclosed therein is a heat exchanger for a refrigeration cycle in which a suction pipe and a capillary tube are made of aluminum which is inexpensive, instead of the copper-made suction pipe and the copper-made capillary tube of the existing heat exchanger for the refrigeration cycle, and which is easy to apply the meandering. The capillary tube is made of aluminum alloy selected from JIS 3000 series alloy and the suction pipe is made of aluminum selected from JIS 1000 series aluminum, and the outer surface of the capillary tube and the outer surface of the suction pipe are melted and bonded together, or particularly, are melted and bonded together by fiber laser beam radiation. The heat exchanger is equipped in a refrigerator.

Abstract: The invention relates to an apparatus (10) for sectioning histological samples, which encompasses a sectioning unit (18), a sample holder (14), and a drive unit (16) for moving the sample holder (14) relative to the sectioning unit (18) in order to section the sample (12). Also provided is a cooling unit (20), for cooling at least a sub-region of the sample holder (14), which encompasses a compressor for compressing a refrigerant, a capillary tube (25) for delivering the liquefied refrigerant from the compressor (22) to the sample holder (14), and a return line (28) for returning the refrigerant from the sample holder (14) to the compressor (22). At least a sub-region (32) of the capillary tube (25) is embodied in a spiral shape.

Abstract: A building built-in air conditioning system comprising: an external heat exchanger (1), a reversing valve (2), a compressor (4), and microporous tubes (9, 10, 11). The microporous tubes are metal capillaries bound on a construction steel bar (12) and integrated with the concrete by casting.

Abstract: A vapor compression refrigeration system includes a subcooler provided between a condenser and an evaporator, which is formed by a heat exchanger integrally having a primary side and a secondary side into which a refrigerant which has passed through the primary side flows and in which the primary side and the secondary side have the same heat transfer area and capacity. An expansion valve is provided at a refrigerant entrance on the secondary side of the subcooler, and a primary expansion valve is provided at a refrigerant entrance on the primary side of the subcooler to which the refrigerant is introduced in a vapor compression refrigeration cycle having stages of compression, condensation, expansion and evaporation of the refrigerant. A bypass is provided in the primary expansion valve at the refrigerant entrance on the primary side.

Abstract: A cooling system that cools a heat generating source mounted on a vehicle includes: a compressor that circulates refrigerant; a first heat exchanger that performs heat exchange between the refrigerant and outside air; a decompressor that decompresses the refrigerant; a second heat exchanger that performs heat exchange between the refrigerant and air-conditioning air; and a cooling device that is provided on a path of the refrigerant flowing between the first heat exchanger and the decompressor and that uses the refrigerant to cool the heat generating source. A capillarity generating portion that causes the refrigerant to rise due to capillarity is provided inside the cooling device.

Abstract: Disclosed is a gravity flooded evaporator for use with commercial or industrial heating, air conditioning, and ventilation systems, and which does not require integration or use of a conventional, separately field-piped, surge vessel and associated subsystem.

Abstract: A heat transfer system having an evaporator, a heat exchanger, and a working fluid that undergoes compression. The heat exchanger includes a first tube made from a steel alloy which is alloyed to facilitate bending, the first tube having a first end connected to the outlet of an evaporator and a second tube having a first end connected to the inlet of the evaporator. The second tube is positioned in thermal contact with the first tube for a portion of the respective lengths of the first tube and the second tube, so as to allow an exchange of heat between the fluid within the tubes.

Abstract: A flow restriction or metering device for a refrigerant system includes a crimped or otherwise formed tubular insert that is installed within a standard flare fitting. The flare fitting can be similar to those used for coupling two refrigerant lines, or the fitting can be part of a service valve, such as those used for charging, discharging, or servicing refrigerant systems. The insert provides a fixed orifice having a predetermined flow coefficient. The insert is removably clamped within the fitting and extends into a refrigerant line that connects to the fitting.

Abstract: A refrigeration cycle apparatus which is capable of performing matching of the volumetric flow rate without performing pre-expansion it obtained. A refrigeration circuit includes a compression unit including a main compressor and a second compressor, a gas cooler, an expansion mechanism, and an evaporator interconnected with pipes, and a sub-compression mechanism driven by power recovered by the expansion mechanism, a suction side of the sub-compression mechanism is connected to a compression process of the compression unit, a discharge side of the sub-compression mechanism is connected to an inlet side of the gas cooler, and flow rate of refrigerant flowing into the sub-compression mechanism is controlled.

Abstract: A refrigerant system is provided with an expansion device that may be a thermostatic expansion device or an electronic expansion device. A bypass line selectively allows a portion of refrigerant to bypass the expansion device and to flow through a fixed restriction expansion device such as an orifice positioned in parallel configuration with the main expansion device. A valve selectively enables or blocks refrigerant flow through this bypass line depending on the volume of refrigerant required to circulate through the refrigerant system as defined by environmental conditions and a mode of operation. The valve can be a simple shutoff valve or a three-way valve selectively allowing or blocking refrigerant flow through a particular refrigerant line or lines. In one embodiment, the expansion device is the main expansion device for the refrigerant system. In the other embodiment, the expansion device is a vapor injection expansion device for expanding refrigerant for performing an economizer function.

Abstract: An expansion valve (1) is disclosed which comprises an inlet opening (2), at least one outlet opening (3) and first and second valve parts. The inlet opening (2) is adapted to receive fluid medium in a liquid state. The outlet opening(s) (3) is/are adapted to deliver fluid medium in an at least partly gaseous state to a flow path. The valve parts are arranged movable relative to each other in such a manner that the mutual position of the first valve part and the second valve part determines a fluid flow between the inlet opening (2) and the outlet opening(s) (3). During normal operation, a resulting force acts upon the first valve part and/or the second valve part to press the first and second valve parts towards each other. The expansion valve (1) comprises means for reducing the resulting force acting upon the valve part(s). Thereby the valve parts can easier be moved relative to each other, and the force required in order to operate the valve (1) is thereby reduced.

Abstract: A vehicle drain hole structure includes an enclosure (e.g., an air intake tube, an intake enclosure, a resonator, a cleaner, etc.) defined by at least one wall. The at least one wall has an inner surface and an outer surface. A drain hole is defined in the at least one wall for providing drainage from the enclosure. The drain hole extends from a first end defined in the inner surface to a second end defined in the outer surface. The first end of the drain hole at the inner surface has a larger cross-sectional area than the second end of the drain hole at the exterior surface to reduce the likelihood of a liquid film forming across the drain hole.

Abstract: A superconducting magnet device for a single crystal pulling apparatus is arranged outside a pulling furnace containing a crucible for melting a single crystal material therein so as to apply a magnetic field to the melted single crystal material. The superconducting magnet device for a single crystal pulling apparatus includes a cryostat containing a superconducting coil therein, and a refrigerator port arranged on the outer circumferential surface of the cryostat and provided with a cryogenic refrigerator that cools the superconducting coil. The cryogenic refrigerator is provided in a region of the outer surface region of the cryostat at which the intensity of the magnetic field generated by the superconducting coil is weak.

Abstract: A refrigerant expansion assembly, and method of operation, for use in a vehicle air conditioning system is disclosed. The assembly has a main body including an orifice inlet port, an orifice outlet port, an orifice channel extending between the orifice inlet and outlet ports and including a fixed orifice, an upstream bypass channel extending from the orifice channel between the orifice inlet port and the fixed orifice and including a valve seat, and a downstream bypass channel extending from the orifice channel between the fixed orifice and the orifice outlet port. A bypass valve flange extends from the main body, forming a bypass chamber connected to the upstream bypass channel and the downstream bypass channel, with the ball valve seat adjacent to the bypass chamber. A check ball mounts in the bypass chamber adjacent to the valve seat, and a spring biases the check ball into the valve seat.

Abstract: A positive displacement expander includes a volume change mechanism (90) for changing the volume of a first fluid chamber (72) of an expansion mechanism (60). The expansion mechanism (60) includes a first rotary mechanism (70) and a second rotary mechanism (80) each having a cylinder (71, 81) containing a rotor (75, 85). The first fluid chamber (72) of the first rotary mechanism (70) and a second fluid chamber (82) of the second rotary mechanism (80) are in fluid communication with each other to form an actuation chamber (66). Meanwhile, the first fluid chamber (72) of the first rotary mechanism (70) is smaller than the second fluid chamber (82) of the second rotary mechanism (80). The volume change mechanism (90) includes an auxiliary chamber (93) fluidly communicating with the first fluid chamber (72) and an auxiliary piston (92) for changing the volume of the auxiliary chamber (93). The auxiliary chamber (93) is in fluid communication with the first fluid chamber (72) of the first rotary mechanism (70).

Abstract: A flow restriction or metering device for a refrigerant system includes a crimped or otherwise formed tubular insert that is installed within a standard flare fitting. The flare fitting can be similar to those used for coupling two refrigerant lines, or the fitting can be part of a service valve, such as those used for charging, discharging, or servicing refrigerant systems. The insert provides a fixed orifice having a predetermined flow coefficient. The insert is removably clamped within the fitting and extends into a refrigerant line that connects to the fitting.

Abstract: The invention relates to an expansion device for a refrigerant, in particular an expansion device to control the high-pressure level of an air conditioner. In accordance with the invention, it is provided that the expansion device (16) is a sliding seat valve (22). In addition, the invention relates to an air conditioner (10), in particular an air conditioner (10) for a motor vehicle, with a compressor (12), a condenser or gas cooler (14), an expansion device (16) as well as an evaporator (18). In accordance with the invention, it is proposed that the expansion device (16) is formed by at least one sliding seat valve (22).

Abstract: A pressure control valve has a temperature sensing portion. The temperature sensing portion includes a diaphragm and a cap member. A peripheral portion of the diaphragm is fixed to a peripheral portion of the cap member. One surface of the diaphragm and the cap member define a sealed space in which gas is airtightly filled. The other surface of the diaphragm is fixed to one end of the valve body, and subjected to fluid in a fluid chamber. A change of the temperature of the fluid changes a volume of the gas in the sealed space to displace the diaphragm and the valve body to open and close a valve port. A reinforcement member reinforces a fixture of the cap member to the diaphragm.

Abstract: A self contained cooling system which is amenable to miniaturization so as to accommodate space and connectivity restrictions implicit in computer and other electronics apparatus while enhancing heat transfer. In use, the cooling systems of this invention use compression/expansion cycles of a refrigerant material to move thermal energy from one location to another. The compressor, condenser, and evaporator are all contained within a volume consistent with mounting directly on a semiconductor device such as a processor.

Abstract: A heat exchanger includes a plurality of flat, multi-channel heat exchange tubes extending between spaced headers. Each heat exchange tube has an inlet end in fluid flow communication with one of the headers and an outlet opening to the other header. Each heat exchange tube has a plurality of flow channels extending longitudinally in parallel relationship from its inlet end to its outlet end. A plurality of connectors are positioned between the inlet header and the heat transfer tubes to define a flow path providing fluid flow communication between the inlet header and the inlet ends of the heat exchange tubes. Two or more flow restriction ports are arranged in the series in the flow path through each connector whereby fluid flowing from the inlet header to the flow channels of the heat exchange tube associated therewith undergoes an expansion as the fluid passes through each flow restriction port.

Abstract: A motor-operated selector valve relating to refrigerating technology is provided. There are disadvantages, such as complicated assembly structure, big noise, vulnerability to interferences etc., in prior art. In the present invention, a slider is controlled by a stepper motor so as to be rotatablely displaced among four positions on a flat bottom surface of a valve seat. Three outlets on the flat bottom surface are communicated with a normal open inlet in the valve seat via flow-guiding orifices in the slider respectively. In the first working position, the first outlet and the third outlet are in communication with the normal open inlet at the same time; in the second working position, the second outlet is in communication with the normal open inlet; in the third working position, the third outlet is in communication with the normal open inlet; in the fourth working position, the first outlet is in communication with the normal open inlet.

Abstract: The problems of prior compressor structures relying upon conventional check valves are obviated by using, instead, flow control passages which operate to control flow while avoiding mechanical moving elements which may become problematical.

Abstract: A variable restrictor including a tube with first and second ends of a first cross-sectional area and a region between the ends of reduced cross-sectional area. The region comprises a flattened portion of the tube where the tube has been permanently deformed such that opposed wall portions of the tube are much closed together than in the remainder of the tube. An actuator is arranged to selectively alter the separation of the opposed wall portions of the flattened section.

Abstract: A method and apparatus for a refrigeration circuit is disclosed. In the refrigeration circuit, a single-component or multi-component refrigerant, preferably a nitrogenous refrigerant, in particular nitrogen, circulates, where at least one partial stream of the refrigerant is expanded. The expansion of the refrigerant takes place in at least two expansion turbines that are arranged in series, and the temperature of the refrigerant at the exit of the expansion turbines, or at least at one of the exits of the expansion turbines, is above the saturation temperature of the refrigerant. In this connection, the temperature of the refrigerant at the exit of the expansion turbines, or at least at one of the exits of the expansion turbines, is less than 10° C., preferably less than 5° C., in particular less than 2° C., above the saturation temperature of the refrigerant.

Abstract: A shut-off valve for pressurized fluids in an air cooling/heating apparatus having a first duct receiving a first restrictor and a second restrictor. Both restrictors are coaxially formed with a capillary through which the pressurized fluid passes and which causes the rapid expansion of the fluid when the fluid exits from a distal end of the capillary. The outer surface of the restrictors is in direct contact with the interior surface of the first duct. The valve can further include a sampling instrument located between the restrictors.

Abstract: A system for modulating refrigerant flow from an evaporator of an air or gas drying apparatus wherein the air or gas drying apparatus has an evaporator shell with at least one exit orifice for return of refrigerant to an accumulator or compressor. The system comprising a flow metering structure connected to the at least one exit orifice, the structure having an internal tube with a vertical rise from an evaporator shell end to an accumulator or compressor end, the internal tube having at least one return orifice (a) which allows passage of liquid refrigerant outside the internal tube into the internal tube, and at least one return orifice (b) which allows passage of gas outside the internal tube into the internal tube.

Abstract: A generally cylindrical restrictor insert for containing an axially movable, apertured restrictive member, housed in a flow control distributor housing of an orifice expansion device used for bi-directionally-flowing pressurized fluid, with a housing passageway being closed off via an annular adaptor flange also having an internal filter, the restrictor insert having a central axial through bore with a plurality of adjoining bore portions defining a central bore cavity, the restrictor insert also having a leading portion, with a frusto-conical front end surface, and intermediate and trailing portions, the latter having a shoulder portion and an annular end face, the restrictive member being located and axially freely movable within a distributor housing central bore cavity, with the restrictor insert, in turn being located, via slip-fit insertion, in a distributor housing central passageway.

Abstract: A Thermostatic Flow Controller composed of two capillary tubes and a tube form receiver, placed in thermal contact with the suction line. It makes a robust, hermitic closed device, without any moveable parts, no need for adjustment or service and therefor suited for inaccessible placement—for instance encapsulated in isolation foam. The flow of refrigerant to the evaporator is controlled by the pressure in the receiver—and the pressure in the receiver is controlled by the need for refrigerant in the evaporator. This balance ensures that the evaporator is flooded, and thereby exploited 100%—for all kind of charges. The invention is suited for small household freezers and refrigerators. For a small extra cost, it replaces the traditional capillary tube, and makes these devices working optimal on both cold and warm locations, and makes the manufacturing more easy because the amount of refrigerant is no longer critical as it is for traditional capillary tubes.

Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space, an inlet side porous permeable member communicating in a refrigerant flow direction, an orifice, an outlet side foamed metal, and an outlet noise eliminating space, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.

Abstract: The invention relates to an assembly for refrigerant circuits that is arranged between the compressor and the evaporator thereof including a housing with a through channel. Within the through channel is a microchannel part having a filtering portion and a decompression portion wherein filtering and decompression of the passing refrigerant can be performed generally at the same time.

Abstract: To reduce the degree of influence of differential pressure on a pilot valve of a constant flow rate expansion valve. The constant flow rate expansion valve comprises a restriction passage for restricting the flow rate of refrigerant introduced from a refrigerant inlet port, a main valve for controlling the flow rate of refrigerant having flowed out from the restriction passage for discharging the refrigerant to a refrigerant outlet port, a piston for actuating the main valve in the valve-opening/closing direction by the differential pressure between intermediate pressure on the inlet port side of the main valve and pressure in a pressure chamber formed on the opposite side of the main valve, and a pilot valve for sensing the differential pressure proportional to the flow rate of refrigerant flowing through the restriction passage, thereby controlling the pressure in the pressure chamber set by a solenoid.

Abstract: A refrigerated cabinet includes a fan assisted refrigeration unit and a duct in communication with the fan, for distributing cold air from the fan throughout the cabinet; the duct is substantially the full width and the full length of the product storage of the cabinet and at least a major portion of the duct has a substantially constant width; one end of the duct is in communication with a fan and the opposite end of the duct provides an end outlet; intermediate outlets are formed through the duct between the ends, to supply air from the duct to the product storage portion of the cabinet; the size of the end outlet is substantially smaller than the size of the intermediate outlets, so that in use the duct is pressurized compared to the remainder of the cabinet.

Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space 19, an inlet side porous permeable member 20 communicating in a refrigerant flow direction, an orifice 23, an outlet side foamed metal 25, and an outlet noise eliminating space 27, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.

Abstract: An expansion device for the heat pump applications consists of a flow resistance device that has a different resistance to refrigerant flow depending on the flow direction through this device. The flow resistance device has no moving parts so that it avoids the damage, wear and contamination problems of the moveable piston in the prior art. The flow resistance device is a fixed obstruction about which the fluid must flow when traveling through the expansion device.

Abstract: An expansion device for the heat pump applications consists of a flow resistance device that has a different resistance to refrigerant flow depending on the flow direction through this device. The flow resistance device has no moving parts so that it avoids the damage, wear and contamination problems of the moveable piston in the prior art. The flow resistance device is a fixed obstruction about which the fluid must flow when traveling through the expansion device.

Abstract: A refrigeration system and method of refrigeration employ dual refrigeration circuits. Each circuit has an independent compressor, condenser and evaporator. In one refrigeration circuit, the flow of the refrigerant from the condenser to the evaporator is regulated in response to variations in the heat load at the evaporator while, in the other refrigeration circuit, the refrigerant is passed from the condenser to the evaporator at a substantially constant rate of flow. The refrigeration system can be used as a cooling system, including an air conditioning system, and as a heat pump. The evaporator in both circuits may be incorporated within a common heat exchanger as may the two condensers. Additionally, the flow of the refrigerant from the condenser to the evaporator in one refrigeration circuit may be regulated in response to variations in the heat load in the evaporator in that refrigeration circuit by a thermal expansion valve.

Abstract: When an air conditioning heat load is equal to or greater than a predetermined value, the degree of throttle opening of a nozzle arrangement of an ejector is controlled in such a manner that a coefficient of performance coincides with a target value. When the air conditioning heat load is less than the predetermined value, the degree of throttle opening of the nozzle arrangement is controlled in such a manner that a flow rate of refrigerant, which passes through the nozzle arrangement, coincides with a target value.

Abstract: An ejector decompression device for a refrigerant cycle includes a nozzle which decompresses refrigerant flowing out of a refrigerant radiator, and a pressure increasing portion which increases a pressure of refrigerant while refrigerant jetted from the nozzle and refrigerant drawn from an evaporator are mixed. In the ejector cycle, a coaxial degree of the nozzle with respect to the pressure increasing portion is in a range between 0-30% of an inlet diameter of the pressure increasing portion. Alternatively, the pressure increasing portion has a taper portion at least in a predetermined range from the inlet of the pressure increasing portion, and the taper portion is provided to increase a passage sectional area from the inlet of the pressure increasing portion. Accordingly, collision of high-speed refrigerant jetted from the nozzle to an inner wall surface of the pressure increasing portion can be restricted.

Abstract: Flow-regulating members are described that include a primary channel and a plurality of secondary channels. The primary channel defines a primary channel orifice in the flow-regulating member and the plurality of secondary channels define a plurality of secondary channel orifices in the flow-regulating member. The plurality of secondary channel orifices are located along a common periphery of the flow-regulating member, such that an axis passing through the primary channel orifice intersects a plane containing the common periphery at a unique point. At least two of the plurality of secondary channel orifices have different cross-sectional areas. At least one of the plurality of secondary channels intersects the primary channel. Expansion devices containing these flow-regulating members are also described, as are vapor compression systems containing expansion devices, and methods of operating vapor compression systems.

Abstract: Multi-type air conditioner including an outdoor unit installed outside of a room having a compressor and an outdoor unit mounted therein, a plurality of indoor units each installed in a room having an electronic expansion valve and an indoor heat exchanger, a distributor for separating refrigerant from the outdoor unit at a gas-liquid separator and guiding separated refrigerant to the plurality of indoor units selectively depending on operation conditions, a first connection pipe for guiding the refrigerant from the outdoor unit to the gas-liquid separator in the distributor, a second connection pipe for guiding the refrigerant from the distributor to the outdoor unit, and a switching part in the outdoor unit having a first four way valve provided to a discharge side of the compressor for selective switching of a flow direction of the refrigerant flowing in the outdoor heat exchanger, and a second four way valve provided to be switched in conformity with switching of the first four way valve for maintaining t