Heat pump refrigerant circuit

Details Heat pump refrigerant circuit Heat pump refrigerant circuit

1979-06-06

1981-05-12

King, Lloyd L.

Refrigeration

Automatic control

Selective heating or cooling

62503, 623244, 623241, F25B 1300

Patent

active

042664055

ABSTRACT:
This invention reduces the time length of defrost cycles in contemporary air-to-air heat pumps by a revision of the system refrigerant circuit wherein two parallel refrigerant circuits connect the reversing valve to the outdoor coil. One circuit includes a trap type accumulator with a check valve in its outlet conduit providing single direction refrigerant flow therethrough only during heating cycles, and the second circuit includes a check valve for single direction refrigerant flow from the reversing valve directly to the outdoor coil bypassing the cold accumulator during defrost cycles to prevent its interception of hot gas from the indoor coil required for quick defrosting of the outdoor coil.

REFERENCES:
patent: 2977773 (1961-04-01), DeKanter
patent: 3128607 (1964-04-01), Kyle
patent: 3232073 (1966-02-01), Jobes et al.
patent: 3246482 (1966-04-01), Harnish
patent: 4017286 (1977-04-01), English et al.
patent: 4045977 (1977-09-01), Oliver, Jr.

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