Closed loop oil charging for ac or refrigerant compressor units

Details Closed loop oil charging for ac or refrigerant compressor units Closed loop oil charging for ac or refrigerant compressor units

1994-09-19

1995-08-29

Sollecito, John M.

Refrigeration

With indicator or tester

62292, 62468, F25B 4900

Patent

active

054449880

ABSTRACT:
The closed loop oil service system operates in conjunction with an air conditioner or refrigerant compressor lubricated by 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, a closed loop calibrated oil augmentation system is formed by incorporating a coupler hose and a clear calibrated fluid injection device. A refrigerant drum is coupled to canister second valve and device pressure port to provide motive force for calibrated oil augmentation operations to a non-operating compressor.

REFERENCES:
patent: 2749723 (1956-06-01), Webber
patent: 3777509 (1973-12-01), Muench
patent: 5167126 (1992-12-01), Cartwright
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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