A refrigerant recovery apparatus is connected between a target apparatus from which a refrigerant is recovered and a refrigerant recovery container. The apparatus includes a compressor, a condenser, and a residual refrigerant recovery path. The compressor sucks the refrigerant from a refrigerant circuit of the target apparatus and compresses the refrigerant. The condenser condenses the refrigerant discharged from the compressor and sends the refrigerant to the refrigerant recovery container through a main refrigerant recovery path. The residual refrigerant recovery path through which a decompression mechanism on a branch path branching from the main refrigerant recovery path decompresses a residual refrigerant in the condenser. The decompressed refrigerant is sucked into the compressor and pressurized. The pressurized refrigerant is sent into the refrigerant recovery container. An auxiliary heat exchanger is connectable near an outlet of the condenser and upstream of a junction between the main and branch paths.

A method and apparatus for reclaiming refrigerant. The method includes transferring, an unreclaimed refrigerant composition, including one or more hydrofluoro olefins, from a source vessel to a receiving vessel and transporting the receiving vessel to a recycling center. The unreclaimed refrigerant composition is analyzed to determine the composition of the unreclaimed refrigerant composition sample. A target composition is determined, based on the analyzed unreclaimed refrigerant composition, and one or more treatments are determined, based on the target composition. The unreclaimed refrigerant composition is treated, with the one or more treatments, to form a reclaimed refrigerant composition having the composition of the reclaimed refrigerant composition is equal to the target composition.

A refrigerant recovery system is equipped with an extraction pipe, a stabilizer holding container, a recovery pipe, a recovery container, and a recovery device. The extraction pipe is connectable to a refrigerant extraction port of an air conditioning apparatus. The stabilizer holding container is connected to the extraction pipe—and holds a stabilizer. The stabilizer holding container causes refrigerant guided by the extraction pipe to come into contact with the stabilizer. The recovery pipe guides the refrigerant discharged from the stabilizer holding container. The recovery container is connected to the recovery pipe and recovers the refrigerant guided by the recovery pipe. The recovery device causes the refrigerant to move from the refrigerant extraction port to the recovery container. The refrigerant includes a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds.

An inlet debris filter disposed within a manifold assembly and operable to filter refrigerant that flows through the manifold assembly. In some embodiments, the manifold assembly may be disposed within an air conditioning servicing system. In some embodiments, the inlet debris filter may be removable and serviceable.

A valve system includes a motor, a first valve, a second valve, and a controller. The first valve is connected to the motor shaft and is rotatable to an open position, in which fluid flows through a first channel, and a close position, in which fluid is prevented from flowing through the first channel. The second valve is connected to the motor shaft and is rotatable to an open position, in which fluid flows through a second channel from a first end to a second end, and to a close position, in which fluid is prevented from flowing through the second channel. The controller is connected to the motor and can sequentially actuate the first valve and the second valve to create at least a first, second, third, and fourth position.

A refrigerant metering system/method incorporating a manual expansion valve (MEV), condenser isolation valve (CIV), flow isolation valve (FIV), and evaporator isolation valve (EIV) is disclosed. The MEV is configured to replace a conventional automated expansion valve (AEV) that controls a refrigerant flow valve (RFV) that is positioned in a heating, ventilation, and air conditioning (HVAC) system between a refrigerant condenser coil (RCC) and a refrigerant evaporator coil (REC) and permits manual metering of refrigerant by the RFV from the RCC to the REC and also allows complete shutoff of refrigerant flow by the RFV from the RCC to the REC. The MEV allows rapid HVAC repair and restoration of service where a replacement AEV is not readily available. The CIV/FIV/EIV are positioned in the refrigerant flow lines to permit the AEV and/or REC to be isolated from HVAC refrigerant flow for repairs to the AEV and/or REC.

A refrigerant metering system/method incorporating a manual expansion valve (MEV), condenser isolation valve (CIV), flow isolation valve (FIV), and evaporator isolation valve (EIV) is disclosed. The MEV is configured to replace a conventional automated expansion valve (AEV) that controls a refrigerant flow valve (RFV) that is positioned in a heating, ventilation, and air conditioning (HVAC) system between a refrigerant condenser coil (RCC) and a refrigerant evaporator coil (REC) and permits manual metering of refrigerant by the RFV from the RCC to the REC and also allows complete shutoff of refrigerant flow by the RFV from the RCC to the REC. The MEV allows rapid HVAC repair and restoration of service where a replacement AEV is not readily available. The CIV/FIV/EIV are positioned in the refrigerant flow lines to permit the AEV and/or REC to be isolated from HVAC refrigerant flow for repairs to the AEV and/or REC.

A method and device for flushing an HVAC line, wherein an output line from a manifold is inserted into an HVAC service line and a first medium is connected to a first input line connected to the manifold and a second medium is connected to a second input line connected to the manifold. The flow of the first medium into the manifold using a first valve and/or flow of the second medium into the manifold using the second valve so that the first medium and/or second medium are selectively provided to the manifold and exit the manifold and enter the HVAC service line through the output line, and the outflow of the first medium and/or second medium out of the HVAC service line is monitored.

A refrigeration system includes a main refrigeration circuit for holding refrigerant fluid, the main refrigeration circuit including: a compression device 12, a heat rejecting heat exchanger 14, an expansion device 18 and a heat absorbing heat exchanger 16. In addition, the refrigeration system includes a buffer tank 20 attached to the main refrigeration circuit, with valves 22, 24 for controlling flow of refrigerant fluid between the main refrigeration circuit and the buffer tank 20. The refrigeration system is arranged such that the valves 22, 24 are controlled to transfer refrigerant fluid between the main refrigeration circuit and the buffer tank 20 based on a measure of sub-cooling in the main refrigeration circuit.

An apparatus for connecting an evacuation hose to a system for evacuation of the system. The apparatus includes a first connector, a second connector, and a seal. The first connector includes a first face defining a longitudinally extending indentation and the second connector includes a second face with a protrusion that is positionable within the indentation. The seal is positionable on the protrusion to circumscribe the protrusion and to be sealing engagement with the first connector and the second connector when the protrusion is at a preferred position in the indentation.