Abstract: A manifold for charging a system which when in use cycles a refrigerant between liquid and gaseous states is disclosed. The manifold includes a housing defining a flow passage extending from an inlet to an outlet. Structure is within the housing to define a capillary in parallel communication with a section of the passage. A refrigerant state control valve is connected to the housing. The valve, when in the open position, enables concurrent refrigerant flow through both the section of the passage and the capillary to charge such a system with refrigerant in a liquid state. The valve when in the closed position sufficiently blocks the section of the passage to cause all refrigerant flow to be through the capillary thereby to enable charging such a system with refrigerant in a gaseous state.

Abstract: Apparatus for connecting a first pre-charged section of an air conditioning system to refrigerant lines connecting the section to a second section of the system. A service unit is employed to connect each refrigerant line to the pre-charge section which includes a body fabricated from a square or rectangular piece of bar stock. A main channel is formed through the bar stock and one end of the main channels is coupled to a suitable system component in the pre-charged section by a tube. A connector having a penetratable seal is mounted in the opposite end of the channel. The connector has a male fitting that is threaded into a female fitting. One fitting is mounted in the opposite end of the main channel and the other fitting is mounted in the refrigerant line. The seal is ruptured or broken when the male fitting is threaded into the female fitting a sufficient depth to establish a leak proof joint therebetween.

Abstract: An air conditioning system includes an outdoor unit and multiple indoor units. Each of the indoor units has its own coil assembly and fan and is dedicated to heating a particular area within a building, for example. Not all of the indoor units operate at the same time. Managing the refrigerant charge level within the active part of the system includes controlling an amount of refrigerant flow through the inactive indoor units. When the active part of the system does not have an adequate charge, an increased return flow from the inactive indoor units to the outdoor unit serves to increase the charge. Under circumstances where there is an overcharge in the active part of the system, the inactive indoor units are effectively used as storage for excess refrigerant on a temporary basis.

Abstract: A purge system operable to remove lubricant from a liquid refrigerant material removed from an evaporator of a mechanical refrigeration system. The contaminated liquid refrigerant is delivered to the purge system by gravity and the separated lubricant is returned to the compressor sump by force from a pressurized fluid. Refrigerant vapor is separated from the contaminated liquid refrigerant by heating and returned to the evaporator of the mechanical refrigeration system.

Abstract: A refrigerant charging tool. In a described embodiment, a refrigerant charging tool has two separately formed handles pivotably attached to each other. One of the handles has a container piercing member mounted thereon. Interchangeable spacers are configured for attachment to the other handle, so that a selected one of differently shaped containers may be biased against the container piercing member when the handles are pivoted toward each other.

Abstract: A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; apparatus condensing the non-condensable gases into a condensed form; apparatus accumulating the non-condensable gases in a header space; apparatus returning the condensed gases from the purge tank to the system; apparatus controllably removing the accumulated non-condensable gases from the header space; and apparatus generating controlled flow in the condensable and non-condensable gases.

Abstract: A valve core includes a generally cylindrical core body fixed in a core mounting hole formed in a counterpart member, the core body having an open end, a moving shaft extending through the core body so as to be directly driven, the shaft having an end, a pair of flanges formed on the end of the shaft, a generally annular sealing member held between the flanges so as to adhere closely to an inner circumferential edge of the open end of the core body or an inner circumferential face of the core mounting hole to close the core mounting hole, and a pair of engagement portions formed in either flange and the sealing member so as to be brought into a concavo-convex engagement with each other to limit deformation of the sealing member causing an increase in its diameter.

Abstract: There are provided a high-yield economical, refrigerant processing apparatus for collected equipment which can recover and regenerate a liquid refrigerant by highly efficient thermal conversion and charge collected equipment with the liquid refrigerant, without releasing the refrigerant into the air, and an oil separator for use with the refrigerant processing apparatus. In the oil separator, an oil is separated from an oil-containing refrigerant to be recovered, and in a condenser, a gaseous refrigerant is converted into a liquid refrigerant. The oil separator has a heat exchanging double spiral pipe in which a double pipe made of a central pipe and an external pipe is formed spirally about a vertical central axis of the oil separator, and a heating unit for vaporizing the liquid refrigerant.

Abstract: Apparatus for connecting a first pre-charged section of an air conditioning system to refrigerant lines connecting the section to a second section of the system. A service unit is employed to connect each refrigerant line to the pre-charge section which includes a body fabricated from a square or rectangular piece of bar stock. A main channel is formed through the bar stock and one end of the main channels is coupled to a suitable system component in the pre-charged section by a tube. A connector having a penetratable seal is mounted in the opposite end of the channel. The connector has a male fitting that is threaded into a female fitting. One fitting is mounted in the opposite end of the main channel and the other fitting is mounted in the refrigerant line. The seal is ruptured or broken when the male fitting is threaded into the female fitting a sufficient depth to establish a leak proofjoint therebetween.

Abstract: A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; apparatus condensing the non-condensable gases into a condensed form; apparatus accumulating the non-condensable gases in a header space; apparatus returning the condensed gases from the purge tank to the system; apparatus controllably removing the accumulated non-condensable gases from the header space; and apparatus generating controlled flow in the condensable and non-condensable gases.

Abstract: A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; apparatus condensing the non-condensable gases into a condensed form; apparatus accumulating the non-condensable gases in a header space; apparatus returning the condensed gases from the purge tank to the system; apparatus controllably removing the accumulated non-condensable gases from the header space; and apparatus generating controlled flow in the condensable and non-condensable gases.

Abstract: The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refrigerant pumped to the compressor which, in turn, assists to cool the compressor head. The flashing of liquid refrigerant to vapor also deters liquid transfer into the compressor enhancing performance thereof. The vapor passages within the discriminator, cylinder head and/or manifold are sized for receipt of spring actuated ball's to open and/or close the vapor passages during suction and/or discharge of refrigerant vapor or liquid by the compressor.

Abstract: A heating, ventilating and air conditioning worker's servicing cart consisting of a base platform to which is mounted an axle holding two anterior wheels, two posterior platform legs, two pairs of upper platform uprights to the posterior pair of which and the platform legs there are attached handlebars with a top platform attached to the platform uprights and legs with cross braces to which recovery and refrigerant tank strapping is attached with pressurized tank strapping attached to the posterior pair and with brazen rod quivers attached to the posterior platform legs and with a recovery tank stabilizing ring affixed to the base platform as well as a recovery tank stabilizing plate and vacuum pump holding bracket both being affixed to the anterior pair of top platform uprights along with recovery tank support strapping with the plate being affixed below the holding bracket.

Abstract: A microprocessor controlled system performs low pressure side pumpdown with the assistance of a service technician. When the refrigerant in the system is transferred to the high pressure side, the low pressure side is available for servicing by the technician.

Abstract: A refrigerant charging/pressure testing hose assembly meeting SAE standard J2196 is useable to both (1) check the pressure in a refrigerant circuit and, (2) if necessary, add refrigerant to the circuit. The assembly includes a length of refrigerant charging, hose having a quick disconnect coupler disposed at one end and connectable to a service fitting portion of the circuit, a piercing-type shutoff valve disposed at the other hose end and connectable to a refrigerant charging canister, a pressure gauge installed in a longitudinally intermediate portion of the hose, and a check valve installed in the hose between the shutoff valve and the pressure gauge and permitting flow through the hose only toward the quick coupler.

Abstract: A service device connects to a service port of a pressurized system. The device includes a valve opening member for opening a valve within the port. The device can attach to a service unit for servicing the pressurized system. The system can be an air conditioning or refrigeration system.

Abstract: A manifold for charging a system which when in use cycles a refrigerant between liquid and gaseous states is disclosed. The manifold includes a housing defining a flow passage extending from an inlet to an outlet. Structure is within the housing to define a capillary in parallel communication with a section of the passage. A refrigerant state control valve is connected to the housing. The valve, when in the open position, enables concurrent refrigerant flow through both the section of the passage and the capillary to charge such a system with refrigerant in a liquid state. The valve when in the closed position sufficiently blocks the section of the passage to cause all refrigerant flow to be through the capillary thereby to enable charging such a system with refrigerant in a gaseous state.

Abstract: A refrigerant recovery system that includes an accumulator, a storage tank and an integrated two-phase distillation and filtration path interposing the accumulator and the storage tank. The accumulator may be couplable to a system under repair to receive contaminated refrigerant therefrom. The storage tank may be adapted to receive and store processed refrigerant. The integrated two-phase distillation and filtration path may have a vapor filter, a compressor, a radiator and a liquid filter.

Abstract: A microprocessor controlled system performs low pressure side pumpdown with the assistance of a service technician. When the refrigerant in the system is transferred to the high pressure side, the low pressure side is available for servicing by the technician.

Abstract: The present invention generally relates to an apparatus and method for urging fluid from a charging system to a pressurized system. The apparatus has a rigid body with a conduit defined therein. The body is mounted between, and connected to, a charging system containing pressurized fluid and a pressurized system. More specifically, a retractable discharge tube for actuating a first valve to allow the release of fluid held within the charging system, is inserted into a first end of the body. A depressor mounted at a second end of the body is inserted into a tubular fitting connected to the pressurized system. The fitting has a retractable pin for actuating a second valve to permit entry of the fluid into the pressurized system. Once the body is connected to both the charging system and the pressurized system, a force is applied on the charging system toward the pressurized system. The force causes the charging system and the pressurized system to mate with the body.

Abstract: A service valve and cap assembly is disclosed. The service valve comprises a valve stem that is inserted into a valve body. An upper portion of the valve body defines a collar selectively formable between a first installation inner diameter to a second retention inner diameter. A service valve sealing cap includes a base portion and a generally annular sealing portion. An annular shoulder is formed on the sealing portion inner diameter, such that the radially inner diameter of the shoulder portion is less than the collar first outer diameter, and is greater than the collar second outer diameter.

Abstract: Assaying of liquid samples of refrigerant to determine their composition utilizing refractive index techniques. The sampling may be done with the use of extractors which remove refrigerant gases from refrigerant machines, and clean and dry the sample before it is assayed.

Abstract: A method and apparatus for servicing a pressurized system is described. A purge fitting can be used to vent the pressurized system. Venting can release a gas, such as air, from the system. The pressurized system can be a climate control system (e.g., an air conditioning or refrigeration system), a brake system, a hydraulic system, or a service device for servicing a climate control system. The purge fitting allows air that may be trapped in the pressurized system to be vented by depressing a purge actuator, such as a purge button attached to the fitting. The air can be vented from an opening adjacent to the actuator or other orifice. By purging air directly from the system, the amount of air introduced into the system during servicing can be minimized. The invention also features a coupling member that can be compact in size.

Abstract: A heat source unit and refrigerant used in an existing refrigeration system are replaced with new refrigerant and a new heat source unit which employs the new refrigerant and is equipped with an oil separator and extraneous-matter trapping device. An indoor unit of the existing refrigeration system may be used, in its present form, or replaced with a new indoor unit. Further, connecting pipes used for the existing refrigeration are reused. After replacement of refrigerant, the refrigeration system performs an ordinary operation after having performed a cleaning operation. The extraneous-matter trapping device is provided in a refrigerant pipe close to the heat source unit or in a bypass channel connected to the refrigerant pipe close to the heat source unit. Alternatively, only the heat source unit of the existing refrigeration system is replaced with a new one, and there is employed refrigeration oil which has no mutual solubility with respect to HFC or has very low mutual solubility.

Abstract: An access port includes a process port with a removable valve core. An adapter is receivable within an end of the process port, and includes a depressor which can engage a valve within the valve core. The process port allows correction of standard female coupling members for rapid in-plant processing of air conditioning and refrigeration systems; while the use of the adapter with the process port permits the connection of standard field service equipment, to facilitate repair of the air conditioning and refrigeration systems.

Abstract: A helium management control system for controlling the helium refrigerant supply from a common manifold supplies a plurality of cryogenic refrigerators with an appropriate helium supply. The system employs a plurality of sensors to monitor and regulate the overall refrigerant supply to deliver an appropriate refrigerant supply to each of the cryogenic refrigerators depending on the computed aggregate cooling demand of all of the cryogenic refrigerators. An appropriate supply of helium is distributed to each cryopump by sensing excess and sparse helium refrigerant and redistributing refrigerant accordingly. If the total refrigeration supply exceeds the total refrigerant demand, or consumption, excess refrigerant is directed to cryogenic refrigerators which can utilize the excess helium to complete a current cooling function more quickly.

Abstract: Provided are a system and method for nitrous oxide purification, wherein the nitrous oxide product is for use in semiconductor manufacturing. The system and process involve a first sub-system having a purification tank for holding a liquefied nitrous oxide, therein; a vaporizer in communication with the purification tank to receive, vaporize and convey a nitrous oxide vapor back to the purification tank; a distillation column disposed on a distal end of the purification tank to receive a nitrous oxide vapor; a condenser disposed on the distillation column, wherein light impurities are removed and wherein a nitrous oxide devoid of light impurities is conveyed and converted into vapor in the vaporizer. A second sub-system having a first dry bed vessel is disposed downstream of the vaporizer to receive the vapor and reacting the acid gas therein; a second dry bed vessel is disposed downstream of the first dry bed vessel for removing water and ammonia in the vapor.

Abstract: A method of use and apparatus for a quick connect coupling in a fluid system as disclosed herein. The quick connect coupling includes a female coupling assembly and a male coupling assembly. The female coupling assembly includes a female cone housing nestable with a female cone. At least one female flow hole is formed in each of the female cone housing and female cone. The male coupling assembly has a male cone housing nestable with a male cone. At least one male flow hole is formed in each of the male cone housing, and the male cone. The at least one female flow hole rotatably misaligns to seal in a manner that fluid is contained from leaking past the female coupling assembly. The at least one male flow hole rotatably misaligns to seal in a manner that fluid is contained from leaking past the male coupling assembly. The male coupling assembly is removably rotatably insertable into the female cone.

Abstract: A supply canister is partially filled with a refrigerant circuit additive fluid which is partially evacuated, said refrigerant circuit additive fluid is comprised of a combination of a binding azeotrope of methanol and cyclohexanone with a drying agent, a metal sealant and a rubber rejuvinating compound in a single container.

Abstract: A supply canister is partially filled with a refrigerant circuit additive liquid and is partially evacuated. Additive liquid from the canister may be placed into the refrigerant circuit of an air conditioning system by (1) connecting the canister to the circuit after it has been emptied and a vacuum pressure created therein, (2) connecting the canister to the refrigerant circuit suction line during system operation, or (3) connecting the canister to the suction line with the system off, to thereby force refrigerant from the circuit into the canister, and then starting the system to cause the vacuum pressure in the suction line to draw the contents of the canister into the refrigerant circuit.

Abstract: A manifold gauge assembly that combines in a single apparatus the features of a manifold gauge set and the features of a phase change device. The manifold gauge assembly may be utilized for charging both pure liquid refrigerants and blends of liquid refrigerants and still maintain the ability of full porting for vacuum optimization. The invention also comprises a phase change device adapted to be fixedly attached to a manifold.

Abstract: A manifold for charging a system which when in use cycles a refrigerant between liquid and gaseous states is disclosed. The manifold includes a housing defining a flow passage extending from an inlet to an outlet. Structure is within the housing to define a capillary in parallel communication with a section of the passage. A refrigerant state control valve is connected to the housing. The valve, when in the open position, enables concurrent refrigerant flow through both the section of the passage and the capillary to charge such a system with refrigerant in a liquid state. The valve when in the closed position sufficiently blocks the section of the passage to cause all refrigerant flow to be through the capillary thereby to enable charging such a system with refrigerant in a gaseous state.

Abstract: A supply canister is partially filled with a refrigerant circuit additive liquid and is partially evacuated. Additive liquid from the canister may be placed into the refrigerant circuit of an air conditioning system by (1) connecting the canister to the circuit after it has been emptied and a vacuum pressure created therein, (2) connecting the canister to the refrigerant circuit suction line during system operation, or (3) connecting the canister to the suction line with the system off, to thereby force refrigerant from the circuit into the canister, and then starting the system to cause the vacuum pressure in the suction line to draw the contents of the canister into the refrigerant circuit.

Abstract: A gauge manifold is connectable to the suction and liquid lines of an air conditioning refrigerant circuit and has a built-in charge level calculator into which system manufacturing and capacity data is enterable. Charging data corresponding to the input data is stored within the calculator and automatically utilized in conjunction with ambient temperature and refrigerant pressure levels sensed by the calculator to generate a visual display indicating whether the circuit's refrigerant charge level is acceptable, high or low for the particular unit or system being checked. If the displayed charge level is high or low, the gauge manifold is additionally connected to a pressurized refrigerant canister or recycling drum and a valve portion of the manifold is operated to add or remove refrigerant to the circuit, via the gauge manifold, as necessary until the calculator display indicates that the circuit is properly charged.

Abstract: A method, system and manifold for use in the delivery of refrigerant and leak detection dye to an automotive air conditioning unit after evacuation of the unit and without removal of the manifold from a fitting of the unit between delivery of the dye and the refrigerant, and without requirement by the operator to refill the dye between each delivery of dye and refrigerant. The refrigerant and dye come from separate, not inline, reservoirs. The refrigerant provides a wash for dye from the fitting. The method, system and manifold are substantially automated and are operated with limited operator intervention.

Abstract: A system and method for reconditioning a chiller in which moisture has contaminated a refrigerant side of the chiller includes draining refrigerant from the refrigerant side of the chiller and operating a moisture removal assembly connected thereto to remove remaining moisture. The chiller is then recharged with refrigerant and a refrigerant purification assembly connected to the chiller is operated to remove contaminates, such as particulate matter, from the refrigerant. The refrigerant purification assembly includes a vacuum line connected to the chiller for receiving refrigerant drawn out of the chiller and a diaphragm pump connected to the vacuum line and operable to draw refrigerant out of the chiller and through the vacuum line to the pump. A filter assembly is disposed in the vacuum line intermediate the chiller and the pump for filtering contaminates out of refrigerant drawn through the vacuum line.

Abstract: There is disclosed an apparatus for easily recovering a refrigerant from a refrigerant circuit of a refrigeration apparatus at a low cost. A refrigerant recovery apparatus 6A is provided with a pipeline 7 for connection to the refrigerant circuit, a valve 17 with a clamping/piercing function disposed on the tip end of this pipeline 7, and a refrigerant recovery main body 10A containing a solid adsorbent 9 which can selectively adsorb the refrigerant, and the clamping/piercing function valve 17 is attached to the refrigerant circuit to make a small hole in the refrigerant circuit so that the refrigerant is adsorbed/recovered to the solid adsorbent 9.

Abstract: A supply canister is partially filled with a refrigerant circuit additive liquid and is partially evacuated. Additive liquid from the canister may be placed into the refrigerant circuit of an air conditioning system by (1) connecting the canister to the circuit after it has been emptied and a vacuum pressure created therein, (2) connecting the canister to the refrigerant circuit suction line during system operation, or (3) connecting the canister to the suction line with the system off, to thereby force refrigerant from the circuit into the canister, and then starting the system to cause the vacuum pressure in the suction line to draw the contents of the canister into the refrigerant circuit.

Abstract: A unitary hose connection for servicing an automobile air conditioning system is provided. A first connector is disposed at one first end and is connectable with a low pressure service port of an automobile air conditioning system. A second connector is disposed at the other end of the hose and is selectively connectable with both a pressure gauge and a can tap valve. The can tap valve is attachable to a can of compressed refrigerant. When a pressure gauge is attached to the second connector and the first connector is attached to the service port, the pressure of the refrigerant in the automobile air conditioning system can be measured. When the second connector is attached to the can tap valve, the compressed refrigerant in the can may be introduced into the automobile air conditioning system to thereby service the system. The hose connection, pressure gauge, can tap valve, and can of refrigerant may be packaged together in a kit.

Abstract: A fluid delivery apparatus provides for controlled delivery of fluids into a fluid system. The fluid delivery apparatus can allow a defined volume of fluid to be delivered to the fluid system cleanly, minimizing fluid waste and spillage. The fluid delivery apparatus can provide a mechanical advantage allowing the fluid to be delivered easily and efficiently to a pressurized fluid system. The apparatus can have a piston and handle arrangement that can reduce wear of the apparatus.

Abstract: A gauge manifold is connectable to the suction and liquid lines of an air conditioning refrigerant circuit and has a built-in charge level calculator into Which system manufacturing and capacity data is enterable. Charging data corresponding to the input data is stored within the calculator and automatically utilized in conjunction with ambient temperature and refrigerant pressure levels sensed by the calculator to generate a visual display indicating whether the circuit's refrigerant charge level is acceptable, high or low for the particular unit or system being checked. If the displayed charge level is high or low, the gauge manifold is additionally connected to a pressurized refrigerant canister or recycling drum and a valve portion of the manifold is operated to add or remove refrigerant to the circuit, via the gauge manifold, as necessary until the calculator display indicates that the circuit is properly charged.

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 refrigerant conditioning system for cleansing debris and lubricants from refrigerants.

Abstract: Disclosed is a purging apparatus for conducting an air purge required when an equipment such as a split type air conditioner is installed or repaired, and to a to-be purged apparatus and a purging method: a to-be purged apparatus having a to-be purged room with two or more valve openings capable of connecting to a main circuit or to a circuit other than said main circuit; and a purging apparatus having a replacing gas container into which a replacing gas to be exchanged for a to-be purged gas is previously charged and a gas collecting container for collecting gas including said to-be purged gas, one of said valve openings of said to-be purged room and said exchanger gas container can be connected with each other, and the other valve opening of said to-be purged room and said gas collecting container can be connected with each other; said method comprising the steps of: sending said exchanger gas in said exchanger gas container, thereby pushing out said to-be purged gas in said to-be purged apparatus; and coll

Abstract: A manifold gauge assembly that combines in a single apparatus the features of a manifold gauge set and the features of a phase change device. The manifold gauge assembly may be utilized for charging both pure liquid refrigerants and blends of liquid refrigerants and still maintain the ability of full porting for vacuum optimization. The invention also comprises a phase change device adapted to be fixedly attached to a manifold.

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: A fluid delivery apparatus provides for controlled delivery of fluids into a fluid system. The fluid delivery apparatus can allow a defined volume of fluid to be delivered to the fluid system cleanly, minimizing fluid waste and spillage. The fluid delivery apparatus can provide a mechanical advantage allowing the fluid to be delivered easily and efficiently to a pressurized fluid system. The apparatus can have a piston and handle arrangement that can reduce wear of the apparatus.

Abstract: A refrigerant charging hose assembly has an aerosol shut-off valve connectable to a refrigerant canister and interconnected to a disconnect coupler fitting by a length of refrigerant charging hose, the body portion of the coupler fitting being economically formed from high tensile strength elastomeric plastic material. A spring-loaded, floatingly supported control pin member is shifted to open the disconnect coupler fitting when the pin member engages and depresses a corresponding pin member within an air conditioning system service fitting to which the coupler fitting is connected. when the coupler fitting is removed from the service fitting the coupler fitting pin member is spring-driven back to its original position in which a flange portion thereof closes the coupler fitting to prevent discharge of pressurized refrigerant therethrough from the canister.

Abstract: A delivery system to refill and treat automobile air conditioning systems is provided. A sealed housing such as a can contains a combination of automobile air conditioner treatment and a refill component. The refill component includes refrigerant and oil, and the treatment component includes automobile air conditioner treatment chemicals, such as sealant or a booster treatment. The housing can permit a controlled amount of the refill and the treatment to directly charge and treat an auto air conditioning system. A hose connectable between the housing and the air conditioning system is also provided.

Abstract: A method for flushing contaminants from a contaminated refrigeration system, comprising flushing a continuously purified volatile composition through a portion of a refrigeration system during a first phase; flushing an aqueous solvent through the portion of the refrigeration system during a second phase; and drying the portion of the refrigeration system to remove residual water. The source of purified volatile composition preferably employs a recycling or in-line purification system, for example, a fractional distillation system. The preferred volatile composition is R-22.