Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1981-06-04
1982-08-31
Makay, Albert J.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62196C, 62225, 62278, F25D 2106, F25B 4100, F25B 4700
Patent
active
043465650
ABSTRACT:
A reverse air cycle type heat pump is provided that utilizes a refrigeration system having a unidirection refrigerant flow wherein the condenser and evaporator retain their functions, but the air directed across them is redirected for different operations. The refrigeration system employed in the air cycle type heat pump is further provided with a secondary defrost circuit that includes the system liquid line and a conduit having a valve which permits refrigerant flow to bypass the compressor upon termination of compressor operation. A sensing means associated with the system expansion device is arranged on the suction line in a manner that allows the expansion device to regulate the flow of refrigerant through the liquid line in the normal manner when the compressor is operating, while allowing unrestrictive refrigerant flow through the liquid line when compressor operation terminates and the system pressure differential is equalized. This defrost circuit causes the relatively warm refrigerant in gaseous phase in the condenser to displace the relatively cold refrigerant in liquid phase in the evaporator with the flow continuing until the defrost process is completed.
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General Electric Company
Giacalone Frank P.
Makay Albert J.
Reams Radford M.
Tanner Harry
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