Fail-safe electronically controlled defrost system

Details Fail-safe electronically controlled defrost system Fail-safe electronically controlled defrost system

1980-05-08

1982-05-04

Makay, Albert J.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62155, 62234, F25D 2106

Patent

active

043275567

ABSTRACT:
A fail-safe electronically controlled defrost system is provided for use in a frost-free refrigerator suitable for home use. The defrost cycle, in the interests of power conservation, is made subject to plural input electronic control in a circuit in which the intrinsic reliability of the defrost system is specifically designed to revert to a non-power conservation mode in the event of failure of the electronics. Compressor time, door openings and user (vacation mode) settings are typical inputs for control of the period between defrosts.

REFERENCES:
patent: 3460352 (1969-08-01), Lorenz
patent: 3890798 (1975-06-01), Fujimoto et al.
patent: 4197717 (1980-04-01), Schumacher
patent: 4251999 (1981-02-01), Tanaka

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