Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1988-02-24
1989-07-04
Tanner, Harry B.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62156, 62199, 62201, F25D 2106
Patent
active
048438316
ABSTRACT:
A cold accumulation type refrigerator having an improved control system for controlling its defrost cycle. The refrigerator includes a main evaporator for producing cold air, a cooling command signal generating device for generating a cooling command signal when a refrigerator compartment is required to be cooled, a clock device for generating a time data, a refrigerating cycle for cooling the main evaporator in accordance with the cooling command signal and the cold-accumulation material in accordance with the time data from the clock device, and a defrost control device for removing frost deposited on the main evaporator. The defrost control device counts cooling operation time of the evaporator in response to the cooling command signal. If the refrigerator is a fan cool type refrigerator whose evaporator is provided with a cold air circulation fan, the defrost control device counts the operation time of the fan, and when a prescribed time count, such as twelve hours, has been completed, the defrost control device generates a defrost starting signal, whereby a proper defrosting operation is carried out even in the cold-accumulation type refrigerator.
REFERENCES:
patent: 2576663 (1951-11-01), Atchison
patent: 3603379 (1971-09-01), Leonard, Jr.
patent: 3854916 (1974-12-01), Dochterman
patent: 3890798 (1975-06-01), Fujimoto et al.
patent: 4269035 (1981-05-01), Gelbard
patent: 4406138 (1983-09-01), Nelson
patent: 4569205 (1986-02-01), Dempou et al.
Kabushiki Kaisha Toshiba
Tanner Harry B.
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