Refrigerant recovery system

Details Refrigerant recovery system Refrigerant recovery system

1992-05-26

1993-02-02

Sollecito, John

Refrigeration

Automatic control

Withdrawing or adding refrigerant from or to normally closed...

62292, 62 77, F25B 4500

Patent

active

051829185

ABSTRACT:
A refrigerant recovery system that includes a refrigerant accumulator having an inlet port for connection to the liquid port of equipment from which refrigerant is to be recovered, a vapor outlet port and a liquid outlet port. The liquid outlet port of the accumulator is connected to the inlet of a liquid refrigerant pump, which has an outlet for connection to a refrigerant storage container. A valve is responsive to pressure differential between the liquid refrigerant pump and the accumulator for operatively connecting the accumulator vapor outlet port to the inlet of a compressor. Thus, operation of the compressor functions to draw refrigerant from the equipment under service into the accumulator by reducing pressure within the accumulator, while the liquid pump operates to pump liquid refrigerant collected with the accumulator directly to the refrigerant storage container bypassing the compressor. The valve limits pressure differential across the liquid pump.

REFERENCES:
patent: 4261178 (1981-04-01), Cain
patent: 4441330 (1984-04-01), Lower et al.
patent: 4768347 (1988-09-01), Manz et al.
patent: 4856289 (1989-08-01), Lofland
patent: 4981020 (1991-01-01), Scuderi

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