Defroster for heat pump

Details Defroster for heat pump Defroster for heat pump

1997-01-16

1998-11-24

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62278, 623245, F25B 4100

Patent

active

058392920

ABSTRACT:
A defroster for a heat pump to remove frost which falls on an evaporator during a heating operation of the heat pump. The defroster includes a condenser, compressor, and a cylindrical converting valve. A by-pass tube branches off at an outlet of the compressor to induce refrigerant and an on-off valve selectively induces the refrigerant into the bypass tube. A first inlet tube is formed at an upper portion of the cylindrical converting valve for receiving refrigerant drawn by the bypass tube and a first outlet tube emits the refrigerant into an upper portion of the evaporator. A second inlet tube is formed at a lower portion of cylindrical converting valve for receiving refrigerant coming from the condenser and a second outlet tube emits the refrigerant into a lower portion of the evaporator. A converting plate, rotating in the cylindrical converting valve, connects the first inlet tube with the first outlet tube, while connecting the second inlet tube with a second outlet tube.

REFERENCES:
patent: 3572052 (1971-03-01), Toth
patent: 3732703 (1973-05-01), Nordstrom et al.
patent: 4774813 (1988-10-01), Yokoyama

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