Abstract: An improved receiver dryer for a refrigeration circuit is disclosed. The receiver dryer comprises a cylindrical body, a fluid inlet port member and a fluid outlet port member disposed on the cylindrical body, and an induction tube connected to the fluid outlet port member. The fluid outlet port member comprises a connecting member fixed on the cylindrical body, and a port element rotatably supported on the connecting member. The connecting member and the port element form a fluid passage from the cylindrical body to the external refrigeration circuit. The fluid outlet port member is sealed by the clamping action of two opposed surfaces acting on the port element. A sealing mechanism is also placed between the connecting member and the induction tube. Thus, the port member is able to freely rotate, thereby permitting the piping arrangement of the refrigeration circuit to be easily connected and properly sealed.

Abstract: A filter drier is disclosed for installation in a liquid refrigerant line of a refrigeration system, the filter drier comprising a housing having an inlet at one end thereof and an outlet at the other end thereof. The liquid refrigerant is discharged from the inlet into the housing in a jet and a perforate plate is provided within the housing against which this jet impinges for diffusing the refrigerant jet substantially across the width of the housing. A filter filters the diffused liquid refrigerant and a bed of desiccant beads is provided with a perforate divider between the filter and the desiccant. A perforate support plate supports the desiccant bed and a second filter bears on the downstream perforate support plate with the desiccant being engageable with the second filter.

Abstract: An accumulator-dehydrator assembly for an air conditioning system is provided with a desiccant canister outlet fitting having an integral particulate filter cage at one end and an integral neck at an opposite end. The cage is insertable through and the neck is received in a flanged outlet opening in a desiccant canister that is received within the assembly's housing. The neck is also received from the interior of this housing in and sealingly engages with the housing's outlet connector. Both the neck and the flange about the canister outlet opening have radial holes which align and receive an exit end of the assembly's pickup tube arranged external of the canister. The neck and the canister outlet opening flange have cooperating angular alignment means that positively align their pickup tube accommodating holes angularly. The filter cage and the interior of the canister have cooperating longitudinal alignment means that positively align the pickup tube accommodating holes longitudinally.

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 method and apparatus for cleaning and filtering contaminants from the refrigerant in a refrigeration system does not permit any gaseous refrigerant to escape to the atmosphere during repair of the system. A tank containing a disc of filter material has piercing valves connected to an inlet and an outlet. The tank and filter are connected to the contaminated system by the piercing valves, the contaminated refrigerant passes through the filter and is retained in the tank. Once the system is repaired, the refrigerant passes from the tank and filter into the system, but the tank and filter remain connected thereto while the system is operated. The tank and filter are removed after a time sufficient to clean the refrigerant.

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: In a hermetically circulating absorption type refrigerator including a regenerator, a condenser, an evaporator, an absorber and a heat exchanger, the regenerator has an absorbing solution heating tube flux provided between tube plates. The tube plates are encased within a shell of the regenerator. Non-soluble electrodes are arranged between each of the tube plates and the shell. Then, an anti-corrosive current is made to flow through at least one of an end portion of the heating tube, the tube plates and the shell to thereby enhance the anti-corrosion effect together with an anti-corrosive agent or inhibitor.

Abstract: A stop leak composition for sealing leaks in refrigeration systems and method for using same. A mixture of smooth surfaced particles having a size small relative to the leak size is suspended in refrigeration oil and injected into the refrigerant circuit of a system. The particles will be forced into small leaks and will agglomerate to seal the leak. Graphite particles and Teflon.RTM. particles in size ranges from 20 microns to 65 mesh are suitable.

Abstract: A method and apparatus for cleaning and filtering contaminants from the refrigerant in a refrigeration system does not permit any gaseous refrigerant to escape to the atmosphere during repair of the system. A tank containing a disc of filter material has piercing valves connected to an inlet and an outlet. The tank and filter are connected to the contaminated system by the piercing valves, the contaminated refrigerant passes through the filter and is retained in the tank. Once the system is repaired, the refrigerant passes from the tank and filter into the system, but the tank and filter remain connected thereto while the system is operated. The tank and filter are removed after a time sufficient to clean the refrigerant.

Abstract: Heat pump installation operating from a cold source (A) formed of a turbid or corrosive solution, having at least one evaporator (4, 5, 6), a compressor (7), a condenser (8), a fluid cycle, with the condenser being cooled by a heating fluid, comprising expansion and evaporation means (1, 2, 3) at least partially from said solution of the cold source, and wherein the produced vapor is then directed toward the evaporator (4, 5, 6) where it condenses.The invention is particularly useful for heating from calories in geothermic water.

Abstract: In a hermetically circulating, absorption type refrigerator based on a closed circulation system of constituent members comprised of a successive communication of a regenerator, a condenser, an evaporator, an absorber and a heat exchanger, refrigeration being produced by repetitions of concentration, refrigerant dilution, and heat exchange of an aqueous concentrated lithium bromide solution sealed in the circulation system, the aqueous concentrated lithium bromide solution contains at least one each of (a) an inhibitor having a boiling point higher than the solution temperature in the regenerator and (b) an inhibitor having a boiling point lower than the solution temperature in the regenerator. Corrosion of metallic materials used in a refrigerant circulation loop of the refrigerator and those in the absorbing solution circulation loop can be effectively prevented.

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: An accumulator-dehydrator assembly is disclosed in a vehicle air conditioning system wherein refrigerant and oil and possibly water are circulated. All vapor components are forced to pass through a desiccant to allow the desiccant to effectively adsorb any water entrained therein and liquid refrigerant and oil are collected and eventually atomized for continued circulation with the vapor components passing through the desiccant.

Abstract: A hermetically circulating, absorption type refrigerator based on a closed circulation system comprised of a successive communication of a regenerator, a condenser, an evaporator, an absorber and a heat exchanger, parts or the whole of said constituent members in contact with an absorbing solution being comprised of a copper material selected from copper and copper alloy, and refrigeration being produced by repetitions of concentration, refrigerant dilution and heat exchange of an aqueous lithium bromide solution sealed in the circulation system is characterized in that the absorbing solution is an aqueous lithium bromide solution containing (a) a nitrate and (b) at least one triazole compound selected from benzotriazole and tolyltriazole, and has a particularly distinguished corrosion resistance.

Abstract: A liquid accumulator for air conditioning systems and the like having a hollow porous desiccant container which is adapted to be sealingly connected in the bottom of the accumulator's casing prior to permanent assembly thereof and wherein the desiccant container accommodates the accumulator's normal tube assembly and remains serviceable through the bottom of the casing for the adding and emptying of desiccant.

Abstract: A liquid accumulator for air conditioning systems and the like having a hollow porous desiccant container which is adapted to be sealingly connected in the bottom of the accumulator's casing prior to permanent assembly thereof and wherein the desiccant container accommodates the accumulator's normal tube assembly and remains serviceable through the bottom of the casing for the adding and emptying of desiccant.

Abstract: A filter-drier block for use in refrigeration systems to filter and remove moisture from the refrigerant fluid, and the method of making the block. The block is comprised of granular adsorbent material bound together to form a rigid block by the use of phenolic resin and polyisocyanate binders and characterized by a low pressure drop for fluid passing through the block. The method of making the block includes the steps of mixing dry adsorbent granules with solutions of the two binders, blow molding the mixture into a block, curing the resins with an alkaline gas, purging the block of the gas by passing air through the block, and heating the block to drive off the solvents for the binders. The invention also includes a refrigeration system utilizing the block.

Abstract: A heat pump system having a filter-dryer unit located in the discharge line of the compressor provides unidirectional operation of the filter dryer in a bidirectional system. The relatively high water retention capacity of molecular sieve desiccant at elevated temperatures allows operation of the filter-dryer at the outlet of the compressor while internal baffles in the unit, a specially sized housing and a spring loaded desiccant support structure accommodate the relatively high fluid velocity and other conditions encountered in the discharge line.

Abstract: A filter-drier for a heat pump system is installed in flow lines in which the flow of refrigerant is reversed when the system changes from the heating to the cooling mode. Two side-by-side filter-drier units, joined to the flow line by a pair of Y-connectors, are so installed with check valves at the inlet and outlet of each, to filter the refrigerant flowing in one direction through a low pressure filter-drier unit for the heating mode and to filter the high pressure refrigerant flowing in the other direction through the other unit, a more porous filter-drier, for the cooling mode. The outlet check valves permit refrigerant flow through only one filter, and the inlet check valves prevent entrainment, into the flow out of that filter, of contaminants previously trapped in the other filter.

Abstract: A compression refrigeration system having means for causing the accumulation of refrigerant in a selected area when the refrigeration system is inactive by providing a reservoir having a material therein that has greater miscibility with refrigerant than the compressor lubricating oil so that the liquid refrigerant within the inactive sealed system will migrate by gaseous transfer into the lower pressure area in the reservoir and go into solution with the material.

Abstract: An adsorbent unit including a container, adsorbent in the container, a resiliently flexible flap having a first portion attached to the container and having an aperture in a second portion thereof which is adapted to fit over a conduit, with the dimensions of the aperture and the conduit being such that the resilient flexibility of the flap will cause it to lock to the conduit in the area of the aperture.

Abstract: In a refrigerant system utilizing flexible hoses extending between the compressor and the other heat exchanger components, dehydration apparatus to remove moisture from the refrigerant which has passed from the atmosphere into the refrigerant system through the flexible hoses. The dehydrator includes water-impermeable housing means for a desiccant material, such as silica gel, which encircles portions of flexible hose to create a low humidity environment thereabout. Moisture in the system migrates through the flexible hose portion to the dry atmosphere produced by the desiccant material in response to the differential humidity.

Abstract: A filter-drier assembly adapted for bidirectional flow in heat pump systems. The filter-drier assembly includes a pair of bypass lines in the liquid line, each bypass line circumventing one of the expansion devices located in the liquid line. An expansion device is located ahead of the outdoor coil for use in one mode of operation and a second expansion device is located ahead of the indoor coil for use in the other mode of operation. A filter-drier unit is disposed in each bypass line, each filter-drier unit including a check valve enabling flow through the associated bypass line and filter-drier unit in one direction and precluding flow in the opposite direction. The check valve of each filter-drier unit precludes flow in the bypass line when its associated expansion device is operable in one mode of operation. The filter-drier unit includes a shell provided with an inlet and an outlet, and filtering and drying elements in the shell between the inlet and outlet.

Abstract: A receiver dryer for a refrigeration system is disclosed. A receiver dryer body is formed in an extrusion operation. The body contains structure defining at least a pair of passageways and structure for mounting a desiccant containing device between such passageways. End caps are provided for closing top and bottom ends of the body. These end caps contact opposite ends of the desiccant containing device whereby the desiccant containing device forms a barrier between the pair of passageways. Fitting members are provided which are connectable to the passageways through the end caps to permit flow of a fluid through the device. The fluid enters a first fitting and proceeds through a first passageway into a compartment on one side of the desiccant containing device. The fluid flows through the desiccant containing device into a second compartment and is removed from the second compartment by flowing out through the second fitting member.

Abstract: A motor-compressor unit of the sealed type for refrigerating appliances, characterized by the combination of the following features:A. the motor which drives the compressor is a direct current electric motor of the commutator type;B. the chamber containing the motor is separated from the chamber containing the compressor by sealing means for realizing a seal tight with regard to the compressor lubrication oil and with regard to the carbon dust generated by the sliding of the brushes of the commutator,C. in the chamber containing the motor there are disposed, adjacent the commutator, absorption means for chemically absorbing the products originating from the decomposition of the refrigerating fluid caused by damage the compressor and the other components of the refrigerating appliance.

Abstract: A chute formed from a number of rigid panels supported by a support structure to define a duct for distributing and delivering cold air from a refrigeration unit located at one end of a cargo space such as a truck or railcar, toward substantially the other end, for treating cargos which require refrigeration such as perishable vegetables; fruits, plants or any food or similar products. In addition, the panels are formed to cleanse and to filter a portion of the distributed air by the incorporation of air treating or filtration agents within the panels.