Closed loop oil service system for AC or refrigerant compressor

Details Closed loop oil service system for AC or refrigerant compressor Closed loop oil service system for AC or refrigerant compressor

1993-07-21

1995-08-01

Sollecito, John M.

Refrigeration

With indicator or tester

62292, 62470, 62475, 62 84, F25B 4900

Patent

active

054371627

ABSTRACT:
The closed loop oil service system operates in conjunction with an air conditioner or refrigerant compressor lubricated lubricating oil contained within the compressor casing. The compressor includes a submerged oil drain port, submerged oil view port, a refrigerant inlet port and refrigerant outlet port. The closed loop oil service system utilizes a canister containing compressor lubricating oil and having a long stem first valve and a short stem second valve. Depending on the mode of oil service being performed the system may also incorporate a refrigerant recovery unit, a refrigerant drum or a clear calibrated fluid injection device. The system also includes at least a pair of coupler hoses which fluidly and gaseously connect the canister valves and compressor ports in varying configurations. In one embodiment, one coupler hose is connected between compressor oil drain port and canister first valve. The second coupler hose is connected between compressor refrigerant inlet port and canister second valve. A closed fluid and gaseous loop is established between the compressor and the canister during oil removal operations. A refrigerant recovery unit is serially coupled, with an additional coupler hose, between compressor refrigerant inlet port and the canister's second valve to provide a motive force for oil removal operation to a non-operating compressor.

REFERENCES:
patent: 3777509 (1973-12-01), Muench
patent: 5265432 (1993-11-01), Luepke et al.
Thermal Engineering Catalog, p. 252 Thermal Charg-Oil Pumps & Chang-Oil Pump publicly available 1993.
ACR Catalog, publicly available 1993, p. 99. Thermal Charg-Oil Pump, Chang-Oil Pump.
PMI Catalog, p. 178, available 1993, Compressor Oil Pump.

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