Refrigerant handling system and method with multiple refrigerant

Details Refrigerant handling system and method with multiple refrigerant Refrigerant handling system and method with multiple refrigerant

1991-01-22

1992-03-17

Tanner, Harry B.

Refrigeration

Automatic control

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

62 77, 62292, F25B 4500

Patent

active

050957139

ABSTRACT:
A refrigerant handling system that includes a compressor and a condenser, each having an inlet and an outlet, with the condenser inlet normally being connected to the compressor outlet so that refrigerant in vapor phase from the compressor is at least partially condensed in the condenser. To clear liquid refrigerant from the condenser, the compressor outlet is disconnected from the condenser and connected to a refrigerant storage container, and the condenser outlet is connected to the compressor inlet. The compressor is then operated to draw refrigerant in vapor phase from the condenser, and to feed such refrigerant to the refrigerant storage container bypassing the condenser. A gauge is coupled to the compressor inlet so that compressor operation may be terminated by the operator when refrigerant vapor pressure in the condenser drops below a preselected threshold level. Thus, the condenser is cleared of refrigerant, which is now stored in the refrigerant storage container. The handling system may then be reconnected in the normal manner for recharging and operation in connection with a differing type of refrigerant without contaminating the latter.

REFERENCES:
patent: 4441330 (1984-04-01), Lower et al.
patent: 4476688 (1984-10-01), Goddard
patent: 4768347 (1988-09-01), Manz
patent: 4862699 (1989-09-01), Lonnis
patent: 4939905 (1990-07-01), Manz

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