Reverse cycle heat pump

Details Reverse cycle heat pump Reverse cycle heat pump

1975-09-02

1977-06-21

O'Dea, William F.

Refrigeration

Reversible, i.e., heat pump

With product treatment

62472, 62503, 62513, F25B 1300

Patent

active

040303152

ABSTRACT:
A reverse cycle heat pump is provided with a heat exchanger which provides refrigerant subcooling with no thermodynamic losses. The heat exchanger is arranged such that it is operative only during the heating cycle to permit optimum charging of the system and allow operation during the cooling cycle with no excess refrigerant in the system accumulator. The heat exchanger is bypassed when the system is converted from heating to cooling operations.
Liquid refrigerant will be mixed with oil in the accumulator during the heating cycle, but not the cooling cycle. Then since refrigerant liquid returning with the oil from the accumulator to the compressor should be evaporated to avoid harm to the compressor, heat applied to the suction line, with no thermodynamic loss, vaporizes this refrigerant. During the cooling operation, no liquid refrigerant is returned from the accumulator, so heat added to the suction gas would be undesirable.

REFERENCES:
patent: 2977773 (1961-04-01), DeKanter
patent: 3077086 (1963-02-01), Japhet
patent: 3078689 (1963-02-01), Japhet
patent: 3246482 (1966-04-01), Harnish
patent: 3324671 (1967-06-01), Harnish
patent: 3350898 (1967-11-01), Harnish
patent: 3423954 (1969-01-01), Harnish et al.

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