Refrigerant recovery system

Details Refrigerant recovery system Refrigerant recovery system

1991-11-26

1993-05-11

Sollecito, John M.

Refrigeration

Automatic control

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

62292, F25B 4500

Patent

active

052090779

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 connected to the inlet of a refrigerant compressor, and a liquid outlet port. A valve connects the liquid outlet port of the accumulator to the inlet of a liquid refrigerant pump, which has an outlet for connection to a refrigerant storage container. A liquid refrigerant sensor is coupled to the accumulator and responsive to presence of liquid refrigerant within the accumulator for operating the valve and thereby connecting the accumulator liquid outlet port to the liquid pump. A second valve is responsive to the liquid refrigerant sensor for connecting the compressor outlet to the vapor port of refrigeration equipment under service.

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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