Control of defrost in heat pump

Details Control of defrost in heat pump Control of defrost in heat pump

1997-02-14

1998-08-25

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62 80, 62155, F25D 4702

Patent

active

057972737

ABSTRACT:
A defrost control for a heat pump system initiates a defrost of the outdoor coil when certain computed condition occur. The conditions include exceeding a limit as to the difference that may be permitted between the maximum indoor coil temperature occurring since the last defrosting of the outdoor coil and the current indoor coil temperature. The limit that may not be exceeded is computed as a function of the maximum indoor coil temperature occurring since the last defrosting of the outdoor coil.

REFERENCES:
patent: 3777505 (1973-12-01), Otaki
patent: 4790144 (1988-12-01), Yokouchi et al.
patent: 4852360 (1989-08-01), Harshbarger et al.

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