Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1992-01-02
1993-01-26
Sollecito, John
Refrigeration
With indicator or tester
Operatively correlated with automatic control
62292, 62 77, 62149, 62129, F25B 4900
Patent
active
051813904
ABSTRACT:
A refrigerant recovery device for recovering compressible refrigerant from refrigeration system. The system includes in serial fluid communication, a compressor, a condensor, and a means for storing refrigerant. An expansion device is provided in the fluid line interconnecting the condensor and the storage means. A four way valve is provided which has one port interconnected with the refrigeration system being serviced, another port interconnected with the suction side of the compressor and two additional ports in fluid communication with the means for storing refrigerant. The four way valve may be actuated to recover liquid refrigerant from the refrigeration system being serviced by establishing a first path from the system being serviced directly to the means for storing refrigerant. The four way valve establishes a second path from the means for storing refrigerant, through the four way valve to the compressor, the condensor, and, through the expansion device where high pressure gaseous refrigerant is expanded and delivered to the storage cylinder to thereby cool the cylinder. The four way valve may be actuated to another position wherein the refrigeration system being serviced is in direct fluid communication with the suction port of the compressor to thereby directly recover refrigerant in vapor state from the refrigeration system.
REFERENCES:
patent: 4646527 (1987-03-01), Taylor
patent: 5127239 (1992-07-01), Manz et al.
Cavanaugh Wayne B.
Paige Lowell E.
Ripka Chester D.
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