Method for controlling a pausing period of a defrosting operatio

Details Method for controlling a pausing period of a defrosting operatio Method for controlling a pausing period of a defrosting operatio

1997-05-30

1999-02-16

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62156, F25D 2106

Patent

active

058708995

ABSTRACT:
Disclosed is a controlling method for minimizing a temperature deviation in a refrigerator by optimally varying a pausing period of a defrosting operation based on a present temperature in the refrigerator and the pressure of the discharging outlet of a compressor. A controlling section removes frost formed at the evaporation of a freezing compartment during the common operation of the refrigerator and stops the operation of a heater for the defrosting operation. In order to stabilize the temperature in the refrigerator, the controlling section compares the temperature in the refrigerator with the operating temperature of the compressor during the pausing period. When the temperature in the refrigerator is not less than the operating temperature of the compressor, the controlling section compares the pressure of the discharging outlet of the compressor with the operating pressure of the compressor. When the pressure at the discharging outlet of the compressor is not less than a reference pressure, the controlling section drives the compressor to transform the operation of the refrigerator into a common operation. Accordingly, the temperature deviation in the refrigerator can be minimized and the food stored in the refrigerator can be maintained in an its optimal fresh state. Further, the consuming power of the refrigerator can be reduced.

REFERENCES:
patent: 3103794 (1963-09-01), Kyle et al.
patent: 3453837 (1969-07-01), Sandstrom et al.
patent: 3774406 (1973-11-01), Reitblatt
patent: 4178767 (1979-12-01), Shaw
patent: 5228300 (1993-07-01), Shim

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