Adaptive defrost control system

Details Adaptive defrost control system Adaptive defrost control system

1980-05-30

1982-05-04

Makay, Albert J.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62155, 62234, F25D 2106

Patent

active

043275575

ABSTRACT:
A refrigerator includes a compressor, an evaporator fan, a condensor fan and a defrost heater which are controlled by a defrost control system. The control senses the number and duration of freezer and fresh food compartment openings, the duration of the previous defrost operation, and the total accumulated compressor run time since the previous defrosting operation. A stored count is decremented by weighting functions which are adaptably varied in accordance with the number and duration of compartment door openings and the duration of the previous defrosting operation. When the stored count is decremented to zero, the defrosting operation may be initiated, unless inhibited. The defrosting operation is inhibited if the total accumulated compressor run time is less than a predetermined amount. The control is reset to a point just short of a defrosting operation if a power outage occurs.

REFERENCES:
patent: 2711079 (1955-06-01), Grimshaw
patent: 2781641 (1957-02-01), Foley
patent: 3460352 (1969-08-01), Lorenz
patent: 3474638 (1969-10-01), Dodge
patent: 3518841 (1970-07-01), West, Jr.
patent: 3759049 (1973-09-01), Bell et al.
patent: 3898860 (1975-08-01), Shepherd et al.
patent: 3992895 (1976-11-01), Kramer
patent: 4056948 (1977-11-01), Goodhouse
patent: 4142374 (1979-03-01), Ansted et al.
patent: 4156350 (1979-05-01), Elliott et al.
patent: 4251988 (1981-02-01), Allard et al.
patent: 4251999 (1981-02-01), Tanaka
AMF Paragon, "EC20 Series Heat Pump Adaptive Defrost Control", Bulletin 3520, Jan. 29, 1979.

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