Defrost system

Details Defrost system Defrost system

1979-08-13

1981-11-10

Wayner, William E.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62156, 62158, F25D 2106, G05D 2332

Patent

active

042990955

ABSTRACT:
A defrost system for refrigeration units, particularly heat pumps, is described. Features include means for initiating a defrost cycle upon the concurrence of two sensed conditions, and terminating the defrost cycle either on the lapse of a determined time interval or the occurrence of a sensed condition, whichever occurs first. Delay timer means prohibits consecutive defrost cycles or a defrost cycle upon restoration of power in the event of a power failure. Means are also provided permitting short cycle testing of the system.

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