Abstract: A self-retaining adsorbent unit for use in combination with an elongated refrigerant-containing housing includes an elongated adsorbent-carrying porous fabric casing with adsorbent disposed therein. A retaining tab is formed at one end of the casing.

Abstract: In a refrigerant recycling system non-condensables are purged from a recovery vessel which stores refrigerant recovered from a vehicular refrigeration system. A programmed controller controls operation of a purge valve for purging to atmosphere non-condensables in the recovered refrigerant in accordance with a purge routine, wherein the temperature in the recovery vessel is measured, and a look-up table is consulted to ascertain a target pressure corresponding to the measured temperature plus an offset, and the pressure in the recovery vessel is measured. If the measured pressure exceeds the target pressure, the purge valve is opened until the measured pressure drops to the target pressure. Immediately after a recovery operation, the purge routine is operated to purge the vessel to a target pressure based on an offset of 1° F. and, at a later time, after the vessel has cooled, the purge routine is operated to purge the vessel to a target pressure based on an offset of zero.

Abstract: An integrated U-tube and adsorbent unit including a U-tube having first and second legs and a return bend, a space between the first and second legs and the return bend, adsorbent in the space, opposite sides on the first and second legs and the return bend, permeable covers bonded to the first and second opposite sides to contain the adsorbent within the space, a hole in the return bend, a frame connected to the U-bend and defining a space in communication with the hole, and filter material on the frame. An integrated U-tube and adsorbent unit including a plastic U-tube and a self-contained adsorbent unit having a plastic cover bonded to the U-tube with the body of the self-contained adsorbent unit positioned between the legs of the U-tube.

Abstract: An accumulator-dehydrator assembly for use in an air conditioning system including an evaporator and a compressor. The accumulator-dehydrator assembly also includes a canister with an upper portion, an inlet, an outlet and a delivery tube with a first tube end positioned in the upper portion of the canister and a second tube end connected to the outlet. A baffle is disposed within the canister that includes a first end connected to the canister and a second end positioned to define a partition between the first tube end of the delivery tube and the inlet. The purpose of the baffle is to reduce pulsations that result from pressure fluctuations in the air-conditioning system.

Abstract: An absorption type refrigerating apparatus is provided which is capable of not discharging to the outside but, instead, oxidizes hydrogen gas generated therein to water through reaction with metal oxide to inhibit a reduction of the operational efficiency. The hydrogen gas saved in the condenser 9 is brought in direct contact with a metal oxide of the hydrogen gas removing module 93 provided in the condenser 9. This causes the reducing reaction of the metal oxide to transform the hydrogen gas to water. The module 93 of a reduction unit is accommodated in the condenser 9 thus eliminating the need of a conventional sealing structure where the reduction unit is provided outside and connected by a conduit to the condenser 9. The reducing reaction can favorably be promoted by the heat of a refrigerant vapor introduced into the condenser 9 through its inlet 94.

Abstract: An adsorbent package is provided for use within the sealed canister of a fluid flow tube of an air conditioning system. The adsorbent package includes a desiccant bag formed of a pouch having a sealed first end and a substantially cylindrical second end. A filter cap is slidably and sealingly received within the second end of the pouch. The cap includes a resilient sealing ring formed proximate a porous end wall. The sealing ring slidably and sealingly engages an inner surface of the canister. The package is constructed of a non-woven spun bonded nylon and can therefore be snugly received within the tight confines of fluid flow tube or canister sections of an integrated condenser receiver.

Abstract: Novel vapor compression evaporative cooling systems which use water as a refrigerant are provided, as are methods for using same. Also provided are novel compressors, compressor components, and means for removing noncondensibles useful in such cooling systems.

Abstract: An apparatus for recovering and recycling refrigerant is provided. The apparatus includes a separation unit, a compressor, and a receiver tank. The separation unit is provided for condensing compressed refrigerant and for vaporizing contaminated refrigerant. The separation unit includes a multichamber structure having a high pressure region and a low pressure region. The high pressure region includes a high pressure inlet for providing compressed refrigerant vapor to the high pressure region, a high pressure outlet for removing condensed refrigerant from the high pressure region, and a compressor oil outlet for removing compressor oil from the high pressure region. The low pressure region includes a low pressure inlet for introducing contaminated refrigerant into the low pressure region, a low pressure outlet for removing vaporized refrigerant from the low pressure region, and a refrigerant oil outlet for removing refrigerant oil from the low pressure region.

Abstract: An adsorbent unit including first and second porous containers connected by a yoke, adsorbent in the containers, first side edges on the first container containing indentations, second side edges on the second container, an end on the second container having a strap formed thereon for encircling the first container and passing through the indentations when the first and second containers are mounted on opposite sides of a U-bend of a refrigerant accumulator.

Abstract: A receiver dryer includes a canister with a cylindrical sidewall, a lower end wall, and an open upper end. An inlet tube extends upwardly in the canister from an inlet port in the lower end wall. A desiccant tube assembly, comprising a pair of tubes, is received over the inlet tube, with the inlet tube being closely received in one of the tubes of the desiccant tube assembly. A lower baffle is formed unitary with the lower end of the desiccant tube assembly, and a lower filter pad is received over the desiccant tube assembly and against the lower baffle. Loose desiccant is then poured into the canister. An upper filter pad and upper baffle are received over the desiccant tube assembly. A pick-up tube, secured to an upper end cap, is then closely received in the other of the tubes of the desiccant tube assembly. The upper end cap is then secured to the upper end of the canister.

Abstract: An improved filter drier for a refrigeration system having a replaceable tubular filter element is shown. A desiccant assembly is removably secured within a housing. The assembly includes a first and second molded desiccant, a hollow tubular perforated core located within said first and second molded desiccant, and a tubular filter located over said core.

Abstract: In a cooling system for suppressing a temperature rise in a component being cooled by circulating coolant through the component, a moisture eliminating filter is located so as to cover a coolant outlet of a coolant storage tank disposed in the coolant circulating circuit so that the coolant has moisture removed by the moisture eliminating filter before it is supplied to the component being cooled.

Abstract: The application discloses a collection vessel 1 for a condenser of an air-conditioning system, preferably for motor vehicles. The collection vessel 1 holds in its interior a drier that can be exchanged via an opening which can be closed by means of a releasable lid. The lid is designed as a piston-like, cylindrical stopper 3, and be sealed and guided in an axially displaceable manner in a corresponding hole in the collection vessel 1, 2. The stopper 3 is pressed outwardly against a securing ring 9 by the internal pressure (pi) in the vessel, which securing ring is fixed in an annular groove 10 in the collection vessel 2 and is secured against release by a blocking shoulder 8 on the stopper 3. Due to this measure, the lid 3 of the collection vessel 2 cannot be removed when pressure is prevailing inside the vessel. Only when the vessel is depressurized can the securing ring and therefore also the stopper 3 be removed, so that a drier cartridge can be exchanged.

Abstract: An adsorbent unit for a refrigerant accumulator having a housing with a bottom wall and a side wall and a U-shaped pipe with a return bend adjacent the bottom wall and with first and second pipe portions extending from the return bend along the side wall, and a filter body extending outwardly from the return bend, the adsorbent unit including a porous adsorbent container, adsorbent in the container, first and second end portions on the container, a first tab extending outwardly from the first end portion of the container, an elongated slot in the first tab mounting it on the first and second pipe portions, a second tab extending outwardly from the second end portion of the container, an aperture on the second tab mounting it on the filter body, and a separate compartment on the adsorbent unit outside of said container containing a fluent refrigerant tracer dye.

Abstract: A two-stage absorption refrigerating apparatus includes an integrated drum in which a low-pressure evaporator and a low-pressure absorber are arranged in an upper part and a high-pressure evaporator and a high-pressure absorber are arranged in a lower part. Uncondensed gas resulted in a high-temperature generator and elsewhere successively moves toward a low-pressure side along with a circulation of refrigerant and solution. The uncondensed gas deposited in the high-pressure absorber is extracted by bleeding device, and the uncondensed gas deposited in the low-pressure absorber is extracted by an ejector. The extracted uncondensed gas is stored into a gas storage tank via a gas-liquid separator. A valve is provided on the gas storage tank.

Abstract: A closed circuit (13) is formed such that the upper ends of preinstalled refrigerant pipes (2A, 2B) in a refrigerant circuit are connected to each other through an upper connecting passage (11) and the lower ends thereof are connected to each other through a lower connecting passage (12). A refrigerant is charged into the closed circuit (13). In a separator (50) of the lower connecting passage (12), a separating heat exchange coil (52) heats the liquid refrigerant to evaporate it, and a filter (53) captures foreign substance from the gas refrigerant. Two conveying heat exchangers (7A, 7B) of the lower connecting passage (12) alternately carry out a repetitive cooling operation of cooling the gas refrigerant, having been changed in phase by the separator (50), to change the phase from gas to liquid and a repetitive pressurizing operation of pressurizing the liquid refrigerant by heating the refrigerant to the extent kept in the liquid phase, respectively, thereby applying a running force to the refrigerant.

Abstract: A baffle for use in an accumulator-dehydrator used in an air conditioning system having at least a first and a second evaporator and a compressor interconnected by refrigerant lines containing refrigerant. The accumulator-dehydrator first and second inlets all connected to the evaporators and an outlet is connected to the compressor through the refrigerant lines. The baffle is mounted inside the accumulator-dehydrator at either the first or second inlet. The baffle has a housing with an opening to allow liquid refrigerant and oil discharged from one of the evaporators to enter the accumulator-dehydrator and prevent liquid refrigerant and oil from within the accumulator-dehydrator from re-entering the inlet.

Abstract: An integrated U-tube and adsorbent unit including a U-tube having first and second legs and a return bend, a space between the first and second legs and the return bend, adsorbent in the space, opposite sides on the first and second legs and the return bend, permeable covers bonded to the first and second opposite sides to contain the adsorbent within the space, a hole in the return bend, a frame connected to the U-bend and defining a space in communication with the hole, and filter material on the frame.

Abstract: The invention relates to a filling device for motor vehicle air-conditioning systems which can be operated with harmless and natural refrigerants, in particular CO2. The filling device is to have a high safety standard, while at the same time being simple to operate and having a cost-effective makeup. For this purpose, the filling device comprises a connection (12) for connecting the device (10) to the air-conditioning system, a drainage line (18), containing a drainage valve (24), for draining off the refrigerant of the air-conditioning system in a defined manner, a pumping-off line (20) which has a pump (36) and is connected to the connection (12), for completely pumping off refrigerant residues and any other impurities, and a refrigerant feed line (22), connected to the connection (12), for filling the air-conditioning system with refrigerant from a refrigerant reservoir (44).

Abstract: A filter dryer for an air-conditioning system, including an elongated housing enclosing loose molecular sieve material, first and second fluid ports into the housing, a filter basket assembly supported at one end of the housing and a screen and baffle assembly supported at the opposite end of the housing. The first filter basket assembly includes a first cup-shaped filter basket which opens away from the first port toward the molecular sieve material. The first filter basket is retained by an annular, U-shaped flange to the inner surface of the housing by press-fit. The screen and baffle assembly includes a second cup-shaped filter basket which also opens away from the first port. The second filter basket includes a radially-enlarged cylindrical screen portion toward the open end of the basket, a radially-reduced cylindrical screen portion toward the closed end of the screen, and an annular shoulder between the radially-enlarged and radially-reduced portions.

Abstract: An absorption type refrigerating apparatus is provided capable of not discharging to the outside but oxidizing hydrogen gas generated therein to water through reaction with metal oxide to inhibit declination of the operational efficiency. The hydrogen gas saved in the condenser 9 is brought in direct contact with a metal oxide of the hydrogen gas removing module 93 provided in the condenser 9. This causes the reducing reaction of the metal oxide to turn the hydrogen gas to water. The module 93 or a reduction unit is accommodated in the condenser 9 thus eliminating the need of a conventional sealing structure where the reduction unit is provided outside and connected by a conduit to the condenser 9. The reducing reaction can favorably be promoted by the heat of a refrigerant vapor introduced into the condenser 9 through its inlet 94.

Abstract: A device for recovering and separating impurities from the cooling fluid of a conditioning system comprises: a cylindrical container provided at its top with an inlet for the fluid/impurities mixture and with an outlet for the fluid and at its bottom with an outlet for the impurities, with a coil positioned inside the container and provided with an inlet and with an outlet to/from the container, a metal cylinder secured within the container and provided with an inlet and with an outlet, a first duct comprising a compressor for the connection of the upper outlet of the container with the inlet of the inner cylinder, a second duct comprising a condenser for the connection of the outlet of the coil with an external collection tank, a third duct for the connection of the outlet of the inner cylinder with the inlet of the coil.

Abstract: A refrigerant purge system for use with a chiller including a condenser and evaporator to remove noncondensables from the refrigerant comprising a refrigerant separation stage to separate noncondensables from the refrigerant coupled to the chiller by a refrigerant/noncondensables input stage to receive refrigerant and noncondensables from the chiller when noncondensables therein reach a predetermined level and a refrigerant output stage to feed condensed refrigerant to the chiller when condensed refrigerant within the refrigerant separation stage reaches a predetermined level and a noncondensable output stage to release noncondensables to the atmosphere when the noncondensables within the refrigerant separation stage reach a predetermined level.

Abstract: A condenser having an integral receiver dryer includes a first manifold, a second manifold, and a plurality of fluid carrying tubes extending between and in fluid communication with the first manifold and second manifold. The condenser also includes a receiver dryer being internal to and integral with a housing of one of the first manifold and the second manifold and including a dryer material disposed in the housing to dry fluid therein.

Abstract: A refrigerant recovery system and apparatus to connect with a refrigeration machine to selectively receive liquid and vapor refrigerant therefrom and to clean, purify and dry that refrigerant for present reuse; said apparatus includes a recovery line with an inlet connected with a related refrigeration machine, a particulate matter filter and de-acidifier devise with an inlet connected with an outlet end of the recovery line, a liquid-vapor refrigerant flow control devise operating to selectively conduct and cause liquid refrigerant flowing through it and expand to a gaseous state and to selectively and freely conduct and cause vaporous refrigerant to flow through it, said refrigerant flow control devise has an inlet connected with an outlet of the filter and de-acidifier devise and an outlet connected with an inlet of a refrigerant conducting vapor line, an oil separator devise with a refrigerant inlet connected with an outlet end of the vapor line, a refrigerant dryer devise with an inlet connected with an

Abstract: An adsorbent unit for mounting relative to a U-bend pipe of a refrigerant accumulator having spaced pipes and a return bend including a porous container, adsorbent in the container, first and second end portions on the container, first and second bands on the first end portion for placement about the spaced pipes, and a mounting tab at the second end portion for mounting onto a filter housing on the return bend.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: For minimizing declination of the operational efficiency, hydrogen gas generated in an absorption type refrigerator is eliminated by reduction without exhausting to the outside. The hydrogen gas H2 remains close to the level surface 93 of a refrigerant in a condenser 9 is transferred together with a refrigerant vapor via an extraction pipe 92 to a condenser tank 91. The condenser tank 91 is equipped with a heated metal oxide which is allowed to come into direct contact with the hydrogen gas for carrying out its reduction. Accordingly, the hydrogen gas is eliminated and a trace of water is generated. The water is then returned back via the extraction pipe 92 to the condenser 9. As a result, the elimination of the hydrogen gas is successfully carried out while the water generated stays in the system, whereby the content of water in the refrigerant can be maintained to a desired level.

Abstract: An internal oil separator for compressors of refrigeration systems is disclosed. This oil separator supplies an effective quantity of lubrication oil to the drive parts of a compressor, and protects the compressor from being unexpectedly damaged or locked. The oil separator accomplishes the recent trend of compactness of compressors, and prevents a bypass flow of the compressed refrigerant into the compressor. This oil separator collaterally reduces operational noises of the compressor. In this oil separator, an oil-separating chamber 21, having a generally U-shaped passage, is defined in the rear section of a compressor housing by a cover 2. The oil-separating chamber 21 has a guide wall 22, thus forming a desired U-shaped passage therein. Refrigerant inlet and outlet ports 13, 14 are formed on the rear wall of the housing. An oil-collecting part 17 is formed on the bottom of the oil-separating chamber 21 and stores recovered oil therein.

Abstract: An adsorbent unit for a refrigerant accumulator having a housing with a bottom wall and a side wall and a U-shaped pipe with a return bend adjacent the bottom wall and with first and second pipe portions extending from the return bend along the side wall, and a filter body extending outwardly from the return bend, the adsorbent unit including a porous adsorbent container, adsorbent in the container, first and second end portions on the container, a first tab extending outwardly from the first end portion of the container, an elongated slot in the first tab mounting it on the first and second pipe portions, a second tab extending outwardly from the second end portion of the container, an aperture on the second tab mounting it on the filter body, and a separate compartment on the adsorbent unit containing a refrigerant tracer dye.

Abstract: In a refrigerating system using a given refrigerant, a compressor (1) contains lubricating oil and compresses the given refrigerant into a supercritical state having pressure higher than the critical pressure of the given refrigerant. In this event, the compressor discharges a compressed refrigerant of the supercritical state together with the lubricating oil. The compressed refrigerant is separated from the lubricating oil by an oil separator (2) and thereafter cooled in a radiator (3) into a cooled refrigerant. After being decompressed in an expander (4) and evaporated in an evaporator (5), the cooled refrigerant is supplied as the given refrigerant to the compressor.

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: An adsorbent unit including a porous container having first and second end portions, adsorbent in the container, a rigid clip on the first end portion for engaging the spaced pipes of a U-bend of a refrigerant accumulator, a tab on the second end portion, and an aperture in the tab for receiving the filter housing on the return bend of a U-shaped pipe.

Abstract: An improved refrigerant receiver which includes an improved combined filter and adsorbent unit consisting of a filter extending outwardly from an elongated tube which is mounted on a refrigerant outlet conduit of the receiver and which has an outer edge with the wall of the receiver so that all refrigerant must pass through the filter, and at least one container of adsorbent material mounted within the receiver so as to be exposed to the flow of refrigerant passing through the filter without completely obstructing the portion of the receiver through which this flow passes.

Abstract: An improved refrigerant receiver which includes an improved combined filter and adsorbent unit consisting of a filter extending outwardly from an elongated tube which is mounted on a refrigerant outlet conduit of the receiver and which has an outer edge with the wall of the receiver so that all refrigerant must pass through the filter, and at least one container of adsorbent material mounted within the receiver so as to be exposed to the flow of refrigerant passing through the filter without completely obstructing the portion of the receiver through which this flow passes.

Abstract: A method for purging contaminants from a contaminated refrigeration system, comprising providing a source of recycled volatile composition to a refrigerant system; passing the recycled volatile composition through the refrigerant system; receiving the volatile composition from the refrigerant system; and recycling the volatile composition by separation of contaminants therefrom.

Abstract: An apparatus and method are described for refrigeration employing a condenser, an evaporator, and a compressor, wherein a condenser vent is provided for exhausting accumulated mixtures of non-condensable gas, such as air, and refrigerant gas, wherein accumulated non-condensable gas mixed with refrigerant gas from the condenser vent is provided to a membrane separator comprising at least two chambers separated by a selective membrane, said chambers being a high pressure chamber to which the non-condensable gas mixed with refrigerant gas is supplied, and a low pressure chamber into which the refrigerant gas is selectively permeated through said selective membrane for reintroduction and reuse in the refrigeration cycle, and on said high pressure chamber of said membrane separator, a vent is provided to exhaust non-condensable gas-rich raffinate gas.

Abstract: A method for separating water from a chemical mixture is provided. In the process of the invention, water is separated from a chemical mixture by contacting the chemical mixture with a water-soluble polymer.

Abstract: An absorption air conditioning machine that includes a main machine section containing an evaporator unit, an absorber unit, at least one generator unit, a condenser unit, and at least one solution heat exchanger. The heat exchanger tubes of the units and the solution heat exchanger are all supported within a pair of spaced apart tube sheets to provide a highly compact machine assembly.

Abstract: Disclosed are a device and a method for vacuumizing an air conditioner having multiple compressors and multiple condensers respectively connected with the compressors by multiple refrigerant pipes. The refrigerant pipes are interconnected by a connection pipe. An inlet of one of the compressors and the connection pipe are connected to a manifold. A vacuum pump is connected to the manifold. The inlets of compressors other than the compressor connected to the manifold and an outlet of the condensers are closed. Thus, the compressors and the condensers form a closed circuit. When the vacuum pump operates, the inner space of the closed circuit is vacuumized. Since many compressors and condensers can be vacuumized using a single vacuum pump, the cost of manufacturing a vacuumizing device is reduced.

Abstract: Apparatus for purging non-condensable gases from an absorption system containing a purge tank connected to the system absorber for collecting non-condensables. A vacuum pump is connected to the tank for drawing the non-condensable gases from the tank and exhausting them to ambient. A solenoid actuated valve is mounted in the vacuum pumps discharge line which is arranged to close immediately when the pump is rendered inoperative during a normal shutdown or during a power failure.

Abstract: A refrigerant recycle and reclaim system includes two liquid refrigerant receivers; a low and a high pressure compressor in fluid communication with each other, each having their own oil separator; a condenser; filter driers; a particular arrangement of check and block valves and a high pressure float proximate the receivers; suction gas cooling components; and auxiliary devices. The suction gas cooling components include an expansion valve, a filter drier, a solenoid valve, and a mixer with sensor. The auxiliary devices include level switches, relief valves, purity sensors, and solenoids. The check and block valves, in combination with the high pressure float, automatically select which liquid receiver the refrigerant will therein be contained. The cooling components serve to lower the temperature of heat-intensive suction gases before entering into the low pressure compressor. The auxiliary devices help serve to continuously recycle refrigerants up to 275 PSIG.

Abstract: A hydrogen discharger comprising hydrogen discharge pipes for discharging hydrogen from hydrogen-containing gas contained therein, which are made from palladium and constituted to be satisfactory in terms of discharge efficiency, heating and sealing and an apparatus comprising the hydrogen discharger such as an absorption type refrigerating apparatus. A plurality of hydrogen discharge pipes of a hydrogen discharger are provided and a heater is installed therebetween to improve heating efficiency. An open end portion having a conical inner surface of the hydrogen discharge pipe and a nozzle portion having a conical outer surface with a plurality of stepped portions of an introduction pipe are connected to each other by pressure to ensure sealing. The hydrogen discharge pipe is made from an alloy comprising 20 to 30% of silver and the balance consisting of palladium so that the hydrogen discharge pipe is suitable for various hydrogen discharge applications.

Abstract: An apparatus and method for reclaiming refrigerants is provided. Specifically, the reclamation system provides a decontamination system for removing contaminants from liquid and vapour phases of a refrigerant with an inlet and outlet control system to regulate the flow of refrigerants. The system is preferably operated in conjunction with a refrigeration circuit to provide heating and cooling energy. The system is effective in reclaiming both low and high pressure refrigerants.

Abstract: A cleaning system which includes a piping system connected between two opposite ends of the cooling loop of an air conditioning system and two opposite ends of a cooling medium reclaiming machine, a first storage tank and a second storage tank respectively connected between the two opposite ends of the cooling loop of the air conditioning system and the piping system, and a plurality of valves provided at the piping system for controlling the flowing direction of a cooling medium between the cooling loop of the air conditioning and the cooling medium reclaiming machine, and a hard grained material carried with the cooling medium through the cooling loop of the air conditioning system between the storage tanks to rub dirty deposit away from the inside wall of the cooling loop of the air conditioning system.

Abstract: A purge processor for purging air and other noncondensibles from refrigeration systems or refrigeration handling systems includes: an inlet gas connector for receiving a gaseous mixture of noncondensibles and refrigerant; a first and second refrigerant receiver; a compressor; a condenser; and a differential pressure switch connected to a solenoid valve for automatically purging a predetermined percentage by volume of refrigerant. For low pressure refrigerant, a back pressure regulator maintains the second refrigerant receiver at a colder temperature than the first. For high pressure refrigerant, an additional compressor and condenser maintains the second refrigerant receiver at a colder temperature than the first. The present invention can continuously separate refrigerant and automatically purge an exhaust known to have less than 1% by volume of refrigerant.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: A bi-directional filter/drier having a flat header welded to a casing with a desiccant canister disposed in the casing. The header has a dedicated low side pressure inlet port formed in the flat which communicates through a pair of oppositely disposed check valves in a cross passage with two separate bi-directional inlet/outlet ports into which low side pressure flow is permitted to by-pass the desiccant to the bi-directional ports. Individual passages, each with a stiffer check valve are provided between the bi-directional ports for permitting high side pressure to flow in either port into the desiccant. A stand pip through the desiccant is connected to an interior port in the header and communicates with a dedicated outlet port in header exterior.

Abstract: A method for constructing a refrigerating cycle that has a unit having a refrigerating compressor which is filled with a part or all of a quantity of working medium beforehand and a heat exchanger, and a unit having a heat exchanger that is located in an area of air conditioning and refrigeration, wherein the units are connected with each other by piping, uses such steps of: connecting the unit having the refrigerating compressor and heat exchanger with the unit having the heat exchanger that is located in an area of air conditioning and refrigeration by means of piping; removing oxygen in a system of the refrigerating cycle by providing an oxygen absorbent in a course of a refrigerant circulating path; separating the oxygen absorbent from the refrigerating cycle; and circulating a refrigerant in the refrigerating cycle, wherein the separating step is carried out immediately after or after the removing step, and the refrigerant circulating step is a final step.

Abstract: A refrigerant recovery system for use in connection with a refrigeration system having an evaporator, a compressor, and a condenser, and a purge unit connected to the condenser for receiving gaseous refrigerant and non-condensable gases from the condenser. A tank connects to the purge unit by a line for receiving purged gaseous refrigerant and purged non-condensable gases from the purge unit. The tank contains adsorbent material for recovering the purged gaseous refrigerant from the purged non-condensable gases. The system includes means for determining when a predetermined amount of purged gaseous refrigerant is received by the tank and means for controlling the flow of fluids to and from the tank.