Adaptive defrost system with ambient condition change detector

Details Adaptive defrost system with ambient condition change detector Adaptive defrost system with ambient condition change detector

1987-08-26

1989-07-25

Tanner, Harry B.

Refrigeration

Time or program actuator

Defrosting

62155, 62156, F25D 2106

Patent

active

048502049

ABSTRACT:
A defrost system adapted for use with refrigeration or heat pump systems wherein an evaporator coil defrost cycle is adaptively modified in response to changing environmental conditions. Under normal conditions, a defrost operation is effected at the end of a period of frost accumulation. The period of frost accumulation is adjusted in accordance with deviation of the time required to defrost a coil from a desired defrost time. During the frost accumulation period, the differential between the temperature of the coil and ambient temperature is determined, and the frost accumulation period terminated and a defrost operation initiated if temperature differential exceeds a target differential.

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