Abstract: An accumulator for use in an air conditioning system for an automotive vehicle includes a refrigerant processing cartridge with an outer casing, a desiccant, a filter, a separator, and a regulator for controlling the pressure of the refrigerant within the air conditioning system.

Abstract: A thermo-hygrostatic refrigerator has a cabinet defining a storage room for cooling and storing food materials therein, a refrigeration unit composed of a compressor, a condenser, an evaporator and other refrigeration systems, a brine tank storing brine therein and including the evaporator on the bottom thereof, an accumulator connected to the outlet side of the evaporator and having at least one portion immersed in the brine, a cooler mounted within the storage room and operatively connected to the outlet side of the evaporator and having at least one portion immersed in the brine, a cooler mounted within the storage room and operatively connected to the brine tank to circulate the brine therethrough to cool the interior of the storage room, and a sensing device mounted within the brine tank for monitoring presence of brine circulation.

Abstract: The invention provides a full flow vaporizer for use in a refrigeration system employing hot gas from the compressor to periodically defrost the cooling coil, or coils where multiple coils are employed. The hot gas cooled in the defrosting coil produces liquid refrigerant droplets that may damage the expensive compressor. The vaporizer usually consists of three concentric circular cross-section tubes forming a first inner passage, a concentric second annular passage, and a concentric third annular passage. The inner tube receives the fluid from the coil and has one end blocked. It is provided in its wall with a plurality of fine bores directing the fluid forcefully radially outwards under the action of the high velocity gas component of the fluid against the inner wall of the middle tube, which is heated by the hot gas that is passd through the third annular passage before being fed to the coil to perform the defrost function.

Abstract: A lateral type accumulator includes a hermetic container which is divided into an intake cell, a discharge cell and a storage chamber between the cells in a horizontal direction by an intake side plate and a discharge side plate, and intake pipe connected to the intake cell, a discharge pipe connected to the discharge cell, and a gas fluid passage from the intake cell to the discharge cell through the intake side and the discharge side plates. The mixture of a lubricating oil and a refrigerant including a gas element and a liquid element is drawn into the storage chamber through the intake pipe and the intake cell, and the mixture is separated into the gas element and a remaining mixture in the storage chamber, hereupon the gas element is discharged from the discharge pipe through the discharge cell along the gas fluid passage. The surface level of the lubricating oil and refrigerant is maintained greater than that in the intake and the discharge cells during the operation of an refrigerating circuit.

Abstract: A subcooling condenser/receiver is provided upstream of and proximate to an expansion device in a refrigeration loop, the condenser/receiver having an inlet for receiving cooled refrigerant, a receiver for accumulating the refrigerant, an integral suction line to subcool the refrigerant, and an outlet for discharging the accumulated refrigerant to the expansion device. Because the suction line is integral to the receiver, the cooled refrigerant is in thermal communication with the spent refrigerant. In order to condense and accumulate refrigerant in the receiver the subcooling condenser/receiver has a flow restricting structure which produces a pressure drop between the subcooling condenser/receiver inlet and the receiver. A liquid seal is formed at the subcooling condenser/receiver in the high pressure line extending from the compressor to the expansion device. This arrangement reduces pressure losses in the high pressure line thus improving the volumetric flow efficiency.

Abstract: An accumulator for use in an air conditioning system for an automotive vehicle includes a cylindrical housing with an inlet tube and an outlet tube extending through the housing, and an axially insertable refrigerant processing cartridge positioned within the housing and including an outer casing, a desiccant, a filter and a separator, all for processing the refrigerant flowing through the accumulator.

Abstract: A suction accumulator for the compressor of a refrigeration system is disclosed in which a suction tube connected to the outlet of the accumulator extends vertically within the accumulator vessel and has liquid metering openings located adjacent to the bottom of the vessel and as gas inlet openings located adjacent to the top of the vessel between the liquid metering openings and the accumulator outlet along the length of the suction tube. A float valve member surrounds the suction tube and is slidable along the vertical length thereof. In response to the accumulation of liquid refrigerant, the valve member covers the gas inlet openings to prevent introduction of liquid refrigerant therethrough. Extension of the gas inlet opening along the vertical length of the suction tube provides progressive opening and closing by the valve member in response to changes in liquid accumulation.

Abstract: A transport refrigeration system 10, and method of operating same, which includes a compressor 14, a receiver 26, an evaporator 42, an accumulator 44, and valve means 18 which initiates heating and cooling modes or cycles which utilize hot compressor gas. Instead of pressurizing receiver 26 at the start of a heating cycle, which traps refrigerant in condenser 24, the heating capacity of a heating cycle is enhanced by connecting the outlet of receiver 26 and the inlet of accumulator 44 in direct fluid flow communication during a heating cycle. Lower pressure in accumulator 44 allows liquid refrigerant in receiver 26 to be directed into accumulator 44, while permitting refrigerant in condenser 24 to drain into receiver 26, to make additional liquid refrigerant available during the heating cycle.

Abstract: An accumulator for an automotive refrigeration system is disclosed. The accumulator includes a housing having a cover, an inlet port for introducing refrigerant, an outlet port, and a U-shaped tube having one end connected to the outlet port and an other end opening to the upper portion of the housing of the accumulator at a predetermined level. A conduit is vertically disposed in the housing of the accumulator and has lower end opening into the housing at a level lower than the other end of the U-shaped tube. The upper end of the conduit communicates with the outlet port through a fluid passage. A sight glass is disposed on the fluid passage to view the refrigerant. On charging the system, when refrigerant is in view, the proper volume of refrigerant is enclosed in the refrigeration system.

Abstract: A method of enhancing the defrost and heating cycles of a transport refrigeration system for a straight truck, which refrigeration system includes a single refrigeration circuit selectively connectible to a compressor driven by the truck engine, or to a stand-by compressor driven by a motor connected to a stand-by source of electrical potential. The enhancement is achieved by slowly but continuously storing heat in an accumulator from the truck electrical system, or from the stand-by source of electrical potential, such that liquified refrigerant introduced into the accumulator during a defrost or heating cycle is immmediately vaporized. The slow but continuous rate of heat storage accumulates the requisite heat without unduly loading the truck electrical system or the truck engine.

Abstract: This invention relates to a device for returning oil to at least one compressor (1) in a cooling or refrigerating system, in which the compressor sucks oil (16) from an oil collecting container (13) through at least one suction conduit (14) connected to the collecting container (13) and having one or more gas and oil intakes (15) which is or are situated above the oil level (16a) in the collecting container (13).

Abstract: A refrigerated gas separation apparatus such as a refrigerated dryer for compressed air, includes a conditioner in the form of a shell and tube heat exchanger which cools incoming hot moist compressed air and warms outgoing cold dry air. The cooled moist gas is refrigerated by contact with a refrigeration system evaporator, in the form of a finned baffled coil, and the condensed moisture is removed in a moisture separator including a central conical baffle or shroud and peripheral longitudinal hooked scraper bars or baffles defining channels for collecting moisture and directing the liquid to a sump.

Abstract: A novel approach to refrigeration systems is a final condenser/cooler positioned prior to the metering or expansion device controlling the flow of refrigerant into the evaporator. The final condenser/cooler is positioned in the cold air stream flowing through the evaporator for cooling thereby. The final condenser/cooler expands part of the liquid refrigerant flowing from the condenser to cool the remaining liquid as it flows into the expansion or metering device and into the evaporator. In embodiments where there is no air circulated through the evaporator, a variation of the final condenser/cooler is used where the expanding refrigerant passing from the metering or expansion device to the evaporator passes through a passage in the main chamber of the final condenser/cooler to cool the liquid refrigerant flowing from the receiver.

Abstract: An integral evaporator and accumulator for a motor vehicle air conditioning system formed with a stack of generally similarly configured plates and a pair of tanks.

Abstract: A method of manufacturing a desiccant assembly for a refrigeration circuit of the type used in automotive air conditioning systems. The method includes performing a container body by cutting a piece of seamless tube stock and friction forming one end of the tube to form an end wall. One or more apertures are formed within the container body to accommodate refrigerant circuit fittings. A refrigerant tube is installed in the container body along with associated components such as the desiccant material, additional fittings etc. Thereafter, the container body is again friction formed to enclose the opposite end wall of the container. The method according to this invention avoids the disadvantages associated with a multi-piece desiccant container which is subject to refrigerant leakage.

Abstract: A scroll-type compressor for compressing helium gas includes stationary and orbiting scroll members each having an end plate and a spiral wrap, with the scroll members being assembled together to define compression spaces therebetween. A driven main shaft driven by has an eccentric mechanism engageable with the orbiting scroll member to cause an orbiting movement of the orbiting scroll member with respect to the stationary scroll member while preventing the orbiting scroll member to rotate about its own axis. The orbiting movement of the scroll member causes a radially inward movement of the compression spaces while progressively decreasing the volumes of the compression spaces, whereby the helium gas sucked through a suction port of the stationary scroll member is progressively compressed finally discharged from a discharge port.

Abstract: A fluid flow control system for use with a heat exchange apparatus which includes a first heat exchange or condensor to extract heat from the heat exchange apparatus, a compressor and a second heat exchange or evaporator to provide heat to the heat exchange apparatus, the fluid flow control system comprises a system charge control device operatively coupled between the first and second heat exchanges to regulate the flow of refrigerant therebetween.

Abstract: A discharge valve and baffle assembly is provided in a refrigeration system having either one or more compressors. The discharge valve and baffle assembly eliminates the effects of an established head upon starting the associated compressor, thereby permitting the compressor to quickly come up to speed for the established head. During compressor operation, the discharge valve and baffle assembly provides a suction force for holding the valve in the open position to prevent bouncing of the valve during part-load conditions and cycling of the valve between the open and closed positions during surge conditions. The assembly prevents backflow of refrigerant through the nonoperating compressor, and also provides a baffle effect to direct the flow of high pressure gaseous refrigerant uniformly into the condenser.

Abstract: Process and apparatus enabling the superheating of the refrigerant fluid of a thermal engine heat pump before its introduction into the compressor. It consists of a surge tank 1 comprising an internal skirt 15 which constitutes a heat exchange surface between the refrigerant fluid and the exhaust gases of the engine. Application to heat pumps.

Abstract: A suction accumulator including a casing for defining a liquid storage vessel. The casing includes an upper and lower end cap. A baffle is disposed in an upper portion of the casing adjacent the upper end cap whereby refrigerant flowing into the inlet will be deflected by the baffle from an axial entry direction to flow in a horizontal plane and will be confined by the baffle until the fluid flows generally tangentially to the casing wall. At this point, the fluid leaves the baffle and flows into the liquid storage vessel. An elongated conduit is disposed in the casing whereby gaseous refrigerant flows through a tortuous path to enter the conduit and then flows through the conduit to the fluid outlet of the suction accumulator. The baffle and conduit may be molded or extruded from plastic material.

Abstract: A refrigerant recovery and purification system is disclosed for recovering refrigerant from a heat pump, air conditioner, or other vapor compression refrigerant system into a storage tank while concurrently purifying the recovered refrigerant of impurities and contaminates. The refrigerant recovery and purification system comprises a pair of accumulators connected in line between the compressor and the refrigerant system being evacuated. The output of the compressor is then connected to a heat exchanger positioned within each of the accumulators. The output of the heat exchangers are then connected to a condenser. The accumulators, having the heat exchangers positioned therein, function to distill the refrigerant flowing therethrough to separate the oil, together with the impurities and contaminates normally contained in the refrigerant, thereby purifying the refrigerant being evacuated.

Abstract: A suction accumulator including a tubular housing defining a liquid storage vessel. A conduit is arranged in the vessel and includes a divider plate for forming two fluid flow passageways. A plastic transition cap is secured to one end of the conduit to form a connection passage between the two fluid flow passageways. A tubular conduit extends from the liquid storage volume through the transition cap member and into the upflow passageway whereby liquid refrigerant is aspirated from the liquid storage volume into the upflow passageway. A screen member is provided in the transition cap member to prevent impurities from flowing through the tubular conduit into the upflow passageway. In one embodiment, a pair of pressure equalizing vents are integrally molded with the conduit to equalize pressures in the accumulator when the compressor is turned off. In another embodiment, a pressure equalizing vent directly connects the outlet of the accumulator to the liquid storage vessel.

Abstract: An adsorbent device including a porous casing containing adsorbent for placement between spaced pipe portions in a refrigerant receiver with the outer edge portions of the casing bearing against the spaced pipe portions, the adsorbent device including a clip having tabs at opposite ends thereof bonded to tabs on opposite sides of the casing, clip portions on the ends of the clip including a first U-shaped portion extending substantially in the direction of the body of the clip for loosely bracketing one of the pipe portions, and a second U-shaped portion extending substantially perpendicularly to the body of the clip for snapping onto the other pipe portion to thereby hold the casing of the adsorbent device between the spaced pipe portions. The clip is oriented relative to the casing so that the clip portion which snaps onto the pipe always extends substantially perpendicularly thereto, regardless of which pipe portion it snaps onto when the pipe portions are not parallel to each other.

Abstract: The number of potentially rupturable brazed refrigerant tubing connections in a refrigeration system is reduced by crimping the check valve 14a directly within a tubing section 14b prior to its bending and assembly, either upstream or downstream of the accumulator/separator 16.

Abstract: A compressor and suction accumulator assembly wherein the suction accumulator is mounted on the casing of the compressor. The accumulator includes a cylindrical casing having two end walls. A first end wall includes an inlet aperture and the second end wall includes an outlet aperture. The second end wall is circular and substantially flat and has a thickness greater than the casing of the accumulator. The outlet aperture in the circular second end wall is spaced radially outwardly from the center of the second end wall near the periphery thereof and is spaced further outwardly from the compressor casing than the center of the circular end wall. A suction tube extends through the outlet aperture into the accumulator casing and is bent inwardly toward the center of the accumulator casing whereby the inlet opening of the suction tube is disposed coaxially with the cylindrical casing of the accumulator.

Abstract: The invention relates to a dryer unit for an encapsulated refrigerant compressor unit. The capsule of the compressor unit has suction and compression nipples and an auxiliary nipple. A dead end housing unit containing a drying agent is connected to the auxiliary nipple.

Abstract: A food service table (10) is provided which includes separate heating and cooling systems enclosed within a housing (12) which may be selectively activated to heat or to cool food displayed and served on the table. Substantially all of the upper surface (13) of the housing (12) includes a food service area (14) in which is mounted a food service pan (24). Heating elements (26) and cooling coils (42) mounted on the pan (24) heat or cool foods displayed in the pan. The cooling system includes accumulator means (34) positioned at the lowest level of the cooling system for receiving and collecting refrigerant fluid upon activation of the heating system. Control means are provided to control the expansion and flow of refrigerant fluid during operation of the heating system.

Abstract: A secondary chamber 40, 64 is provided in a refrigerant suction accumulator 24 to receive liquid refrigerant through return tube 22 from a refrigerant evaporator 20 and is provided with a drip hole 50, 72, to limit the level of refrigerant buildup in the sump 52 under operating conditions of a refrigeration unit in which large quantities of liquid refrigerant are returned to the accumulator.

Abstract: An interchangeable suction line filter-drier and accumulator comprising a vessel having an inlet and an outlet, a removable filter-drier element, and a removable non-porous evaporator conduit which interchangeably functions as a filter-drier when the filter-drier is installed or as a suction accumulator when the non-porous evaporator is installed.

Abstract: A fluid flow control system for use with a heat exchange apparatus which includes a first heat exchange or condensor to extract heat from the heat exchange apparatus, a compressor and a second heat exchange or evaporator to provide heat to the heat exchange apparatus, the fluid flow control system comprises a liquid flow control device operatively coupled between the first and second heat exchanges to regulate the rate of flow of liquid from the first heat exchange to the second heat exchange, separate any vapor from the liquid fed from the first heat exchange to the second heat exchange, and maintain the desired level of liquid in the lower portion of the first heat exchange or condensor, and a vapor flow control device operatively coupled between the second heat exchange and the compressor to regulate the flow of vapor from the second heat exchange to the compressor, separate any liquid from the vapor, and provide for continuous flow of compressor lubricating oil through the vapor flow control device.

Abstract: Liquid is extracted from a vapor compression refrigerant flow circuit utilizing a compressor suction line accumulator having a sump portion and boss formed thereon for receiving a device for extracting liquid from the sump of the accumulator. The device includes a curved tube and shutoff valve connected thereto and wherein the tube has a compression sleeve type tube connector and nut assembly secured thereto at a predetermined point on the tube so that the fluid inlet end of the tube may be inserted into the interior of the vessel containing the sump and oriented such that any liquid in the sump is assured of being forced out through the tube and the shutoff valve during steady state operation of the system.

Abstract: A heat pump having improved compressor lubrication wherein an adequate amount of refrigerator oil is returned to the compressor at all times and the circulation time for the refrigerator oil is reduced. An oil separator is connected between a discharge side of the compressor and a four-way valve of the heat pump system. A bypass is connected between the oil separator and the accumulator. The bypass is provided with an electromagnetic valve for selectively opening and closing the bypass. A control device periodically opens the electromagnetic valve during the operation of the compressor to provide for supply of refrigerator oil to the compressor from the oil separator.

Abstract: An oil return device for a refrigeration system which is placed in the suction line between the evaporator and the compressor to insure that the lubricant oil in the gases is returned to the compressor to prevent damage to the compressor. The device includes an inner tube within an outer tube each of which are connected to a tee fitting so that fluid flows downwardly between the two tubes and upwardly in the inner tube only. A venturi effect is produced at the end of the inner tube which speeds the fluid sufficiently to carry the oil along with the refrigerant.

Abstract: A combined refrigerant receiver, suction gas accumulator, and heat exchanger is provided and is particularly useful in connection with a transport refrigeration unit, and includes an internal concentrically disposed receiver 46 in the upper portion of an accumulator shell 40, the disposition providing an annular space 48 between the receiver and accumulator shell, in which is located a helically wound finned tube heat exchanger 56 which carries warm liquid refrigerant from the receiver to an outlet of the shell connected to an evaporator, with cold suction gas entering the shell at 52 and passing over the external fins 60 on the heat exchanger to exit the shell at 66.

Abstract: A self-regulated refrigeration circuit incorporating a compressor/condenser guard device for cooling compressor refrigerant output prior to application to a condenser and for reevaporating liquid refrigerant discharged from the evaporators prior to its return to the compressor. A pressure differential chamber and high velocity suction line operate in conjunction with the compressor/condenser guard device to control refrigerant flow through the evaporators in both the freeze and defrost cycles of the circuit.

Abstract: A refrigerant fluid accumulator and charging apparatus for vapor-compression refrigeration systems comprising a pressure vessel having an interior liquid/vapor separation chamber, a liquid reservoir, a refrigerant inlet conduit, a primary refrigerant vapor outlet conduit and a secondary refrigerant outlet conduit in communication with a sump portion of the reservoir and with the primary outlet conduit. The secondary refrigerant outlet conduit includes a sight glass for observation of the flow of fluid from the sump into the compressor suction line. Refrigeration systems may be accurately charged with refrigerant fluid by operating the system at design load conditions with the accumulator and charging apparatus interposed in the refrigerant circuit between the evaporator and the compressor and by venting refrigerant fluid from the system until the flow of fluid through the secondary outlet conduit changes from liquid or mixed phase to substantially the vapor phase.

Abstract: An accumulator-dehydrator assembly for an air conditioning system comprising an accumulator housing defining an enclosed chamber including an inlet and an outlet in the upper end and a refrigerant and oil accumulator in the lower end, and a vapor drier canister assembly comprising a one-piece plastic body defining a closed top wall, a closed side wall and an open bottom. The canister includes an integral outlet projecting into and sealingly engaging the outlet of the housing. A vapor filter is associated with the outlet of the canister such that refrigerant flows through the filter before passing through the outlet. A perforated plate is provided in the bottom of the canister for holding desiccant within the canister. A refrigerant and oil tube is mounted externally of the canister and has a lower end extending to the bottom of the chamber of the accumulator housing and has an upper end extending into the outlet of the canister. A filter is associated with the lower end of the tube.

Abstract: An accumulator dehydrator is disclosed having a deflector for directing the flow of refrigerant into the dehydrator, said deflector formed of sheet metal, and permanently secured in operative position by component parts of the accumulator dehydrator. The deflector is provided with a planar body portion which is disposed at an angle to the flow of the incoming refrigerant, and is provided with flanges which inhibit lateral flow of the refrigerant. The deflector is also provided with a portion of arcuate configuration, which is clamped to the accumulator dehydrator in a manner which prevents movement in any direction relatively to the accumulator dehydrator.

Abstract: Suction accumulator structure and method. The structure comprises an outer cylindrical tank having a top and a bottom, a short tube extending through the top of the tank for passage of gaseous phase change material into the tank, a small diameter elongated tube extending into the tank through the top thereof substantially to the bottom of the tank, a large diameter tube having a substantially closed bottom, and an open top sleeved over the small diameter tube, a hollow coil spirally positioned and in radially spaced relation to the large diameter tube and means for passing a heated, heat transfer medium through the coil. The method of the invention comprises wrapping a coil around the suction tube of a suction accumulator and passing a heated heat transfer medium therethrough whereby liquid phase change material within the suction tube which may be metered into the suction tube is vaporized prior to passage out of the suction accumulator.

Abstract: A refrigeration system including a scroll type compressor having a stationary scroll member, an orbiting scroll member, a discharge port formed in the central portion of the end plate of the fixed scroll member, a suction port formed in a peripheral portion of the fixed scroll member, and at least one gas injection port formed through the thickness of an end plate of the fixed scroll member in a portion of the end plate near the spiral wrap, at a position spaced from the wall of the spiral wrap by a radial distance less than the thickness of the spiral wrap. A discharge pipe is connected to the discharge port, with a suction pipe being connected to the suction port. A refrigerant circuit is connected between the suction pipe and the discharge pipe of the scroll type compressor and includes a four-way valve, indoor heat exchanger, first pressure reducer, gas-liquid separator, second pressure reducer and an outdoor heat exchanger.

Abstract: An accumulator for an air conditioning system having a compressor, a condenser and an evaporator wherein the accumulator receives refrigerant from the evaporator at a location near an upper wall thereof, said accumulator including a domed baffle plate in its interior adjacent the accumulator inlet opening whereby liquid portions of the refrigerant are dispersed to the sides of the accumulator allowing the gaseous components of the refrigerant to accumulate in the upper regions of the accumulator adjacent the inlet opening of an outlet tube that extends vertically through the accumulator.

Abstract: A refrigerant fluid accumulator and charging apparatus for vapor-compression refrigeration systems comprising a pressure vessel having an interior liquid/vapor separation chamber, a liquid reservoir, a refrigerant inlet conduit, a primary refrigerant vapor outlet conduit and a secondary refrigerant outlet conduit in communication with a sump portion of the reservoir and with the primary outlet conduit. The secondary refrigerant outlet conduit includes a sight glass for observation of the flow of fluid from the sump into the compressor suction line. Refrigeration systems may be accurately charged with refrigerant fluid by operating the system at design load conditions with the accumulator and charging apparatus interposed in the refrigerant circuit between the evaporator and the compressor and by venting refrigerant fluid from the system until the flow of fluid through the secondary outlet conduit changes from liquid or mixed phase to substantially the vapor phase.

Abstract: A suction accumulator for air conditioning systems and the like consists of a tubular casing with brazed end caps, one of which has inlet and outlet fittings therein which support both ends of a U-shaped conduit within the casing. Inlet and outlet apertures in the conduit and a deflector therebetween to isolate the apertures and direct fluid flow are formed by notching the conduit and cutting and deforming the opposite side to provide a baffle. The ends of the conduit are of different diameters so that a predetermined orientation of the conduit and the apertures therein can be assured within the casing.

Abstract: A refrigerant apparatus having an accumulator for receiving binary refrigerant from the evaporator of the apparatus. An expansion valve is connected in parallel with a capillary duct for increasing the refrigerant delivery from a preselected minimum determined by the capillary tube to controlledly flood the evaporator. The lower boiling point component of the binary refrigerant is caused to be separated in the accumulator for delivery to the compressor during flooded operation of the apparatus so as to increase the proportion of the low boiling point component in the binary refrigerant to provide increased refrigeration capacity to meet the increased demand. Upon decrease in the demand, the accumulated liquid refrigerant in the accumulator is gasified for returning the system to the normal ratio of components of the binary refrigerant. The expansion valve is caused to operate as a function of the temperature of the space refrigerated by the evaporator in effecting the desired flooding operation.

Abstract: The present invention provides a system for effectively managing the refrigerant charge in a heat pump, and for separating a gaseous refrigerant from liquid refrigerant and oil mixture in a manner that allows oil entrapped with the refrigerant to transfer to the compressor, and to insure that only refrigerant in gaseous phase is allowed to enter the compressor through the suction line.

Abstract: A liquid separator in a refrigerating air conditioning apparatus to be provided in the pipeline connecting the compressor and the evaporator thereof is disclosed wherein a container having generally a horizontal cylindrical form with closed ends has its inside divided into two spaces by a rectangular partition plate elongating horizontally and secured at its three sides to the inside walls of the container, the other side being separated from one of the ends so as to leave a gap therebetween. Inlet and exit pipes for a refrigerant gas are secured to the outer wall of the container to be opened into the two spaces, a high pressure liquified refrigerant coil being disposed within the one of the spaces to which the inlet pipe opens so that its principal flow direction intersects orthogonally the direction of the inlet pipe.

Abstract: An adsorbent unit for mounting on a refrigerant conduit in the top portion of a refrigerant receiver including first and second adsorbent containers having porous walls connected by a harness which is an extension of the walls of the containers, a tubular member secured to the harness for telescopic mounting onto an open end of the refrigerant conduit, the first container having a full pocket shape and the second container being U-shaped with a pair of legs on opposite sides of an opening therebetween, and the harness extending between the first container and the upper portion of one of the legs.

Abstract: An adsorbent unit for installation in a refrigerant receiver including first and second porous container members, adsorbent in the container members, a yoke attaching the first and second containers in end-to-end relationship, an aperture in the yoke for receiving a pipe in the refrigerant receiver, and a length of tubing mounted on the pipe for bearing on the yoke adjacent the aperture to retain the adsorbent unit in position.

Abstract: An integral low-pressure accumulator/filter-drier for use in air conditioning and refrigeration systems between the evaporator and the compressor is described. This device is installed in upright position and includes a filter-drier and an accumulator which are separated by a bottom filter-drier retaining member which positions, in cooperation with a top filter-drier retaining member, an annular filter-drier assembly comprising a pair of thin cylindrical filter cartridges which straddle an annular dessicant bed which is itself straddled, at top and bottom, by a pair of annular filter pads. A pickup tube within the accumulator is sealably attached to an opening within the bottom retainer plate and extends coaxially within the inner filter cartridge, being biased against the top retainer plate by a spring assembly so that it is securely held and resistant to vibrations and rotation thereof.

Abstract: A refrigerant transfer system is provided embodying a pump for controlling the level of liquid refrigerant within a suction header of an evaporator unit. The pump includes a pair of elongated chambers in endwise relation. One chamber has a substantially greater cross-sectional area than the second chamber. Opposite ends of each chamber have port means. A first set of inlet and outlet valve means is connected to the port means at each end of said one chamber. Each inlet valve means is alternately connected to a source of pressurized fluid. A second set of inlet and outlet valve means is connected to the port means at each end of the second chamber. Each inlet valve means of the second set communicates with a lower portion of the evaporator suction header. The heads of a double-headed piston are disposed within the chambers. Control means are operatively connected to the first set of inlet valve means for controlling the direction of movement of the piston heads within the chambers.