Refrigerant recovery and purification method and apparatus

Details Refrigerant recovery and purification method and apparatus Refrigerant recovery and purification method and apparatus

1994-01-05

1995-12-05

Sollecito, John M.

Refrigeration

Automatic control

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

62 77, F25B 4500

Patent

active

054718481

ABSTRACT:
A refrigerant recovery apparatus for removing refrigerant from a refrigeration unit includes a pump for pumping refrigerant gas. A first channel for conducting refrigerant from a fluid circuit of a refrigeration unit to the pump has an upstream end with a coupler for coupling the first channel in fluid communication with a refrigeration unit fluid circuit. The first channel downstream end is connected to the pump's suction side. A second channel for conducting fluid from the pump to a refrigerant storage container has an upstream end connected to the high-pressure side of the pump and a downstream end with a coupler for coupling the second channel in fluid communication with a refrigerant storage vessel. The recovery unit further includes a fluid vessel, a first fluid communication path for placing the vessel in fluid communication with the first fluid channel, and a second fluid communication path for placing the vessel in fluid communication with the second fluid channel. A controller opens and closes first and second valves to selectively block the first and second fluid communication paths, respectively. The controller has a first mode in which the first fluid path is open and the second fluid path is closed and a second mode in which the first path is closed and the second path is open.

REFERENCES:
patent: 5167126 (1992-12-01), Cartwright

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