Defrost control apparatus for a refrigeration system

Details Defrost control apparatus for a refrigeration system Defrost control apparatus for a refrigeration system

1991-08-20

1992-09-22

Makay, Albert J.

Refrigeration

Time or program actuator

Defrosting

62158, 62140, F25D 2100

Patent

active

051486865

ABSTRACT:
This defrost control apparatus counts power failure time by using a back-up battery during power failure. In an instantaneous power failure, timers are not reset and operate normally to execute defrost at normal defrost cycle by using power of the back-up battery. During a long power failure, only when it continues over a predetermined time, the timers receives a reset signal and are initialized whereby the defrost operation is executed at a normal interval of the defrost cycle and, because frost melts by the action of natural defrost, the timers are initialized and count the time initiating a defrost cycle from the beginning.

REFERENCES:
patent: 4251999 (1981-02-01), Tanaka
patent: 4299095 (1981-11-01), Cassarino

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