Heat pump with freeze-up prevention

Details Heat pump with freeze-up prevention Heat pump with freeze-up prevention

1980-04-11

1981-12-29

Wayner, William E.

Refrigeration

Processes

Defrosting or frost inhibiting

62282, 62150, 62176A, 165 29, 126427, 126428, 622351, F25B 2700, F25D 2110

Patent

active

043080421

ABSTRACT:
What is disclosed is a heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating the fluid in heat exchange relationship with a refrigerant fluid; at least two refrigerant heat exchangers, one for effecting heat exchange with the fluid and a second for effecting heat exchange between refrigerant and a heat exchange fluid and the ambient air; a compressor for efficiently compressing the refrigerant; at least one throttling valve for throttling liquid refrigerant; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circulating device and heat exchange fluid circuit for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and direction of flow of the refrigerant therethrough for selecting a particular mode of operation. The heat exchange fluid prevents freeze up of the second heat exchanger by keeping the temperature above the dew point; and, optionally, provides heat for efficient operation.

REFERENCES:
patent: 2401560 (1946-06-01), Graham et al.
patent: 2468626 (1949-04-01), Graham
patent: 3584785 (1971-06-01), Matulich
patent: 3859502 (1975-01-01), Heaney
patent: 3922876 (1975-12-01), Wetherington, Jr. et al.
patent: 4098092 (1978-07-01), Singh
patent: 4172493 (1979-10-01), Jacobs
patent: 4187687 (1980-02-01), Savage
patent: 4256475 (1981-03-01), Schafer
patent: 4265092 (1981-05-01), Abraham

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