Refrigerator defrost controlling method

Details Refrigerator defrost controlling method Refrigerator defrost controlling method

1999-03-03

2000-05-09

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62153, 62154, 62155, F25B 4702

Patent

active

060587245

ABSTRACT:
A refrigerator defrost controlling method includes the step of setting an initial defrost cycle, the step of determining whether defrost entering conditions are met, the step of driving a defrost heater to remove the frost formed on the evaporator if the defrost entering conditions are met, and setting a defrost restoration temperature and a defrost cycle according to a latent heat period detected by the temperature of a defrost sensor to perform the defrost operation, the step of terminating the operation if the temperature of the defrost sensor reaches the defrost restoration temperature, and the step of resetting a defrost cycle according to the operating rate of a compressor and the number of door opening/closing times if the defrost entering conditions are not met. The amount of the frost formed on the evaporator is determined from the latent heat period obtained by a change in temperature of a defrost sensor, and a defrost restoration temperature and a defrost cycle are adaptively reset accordingly, thereby performing the optimal defrost operation according to the amount of the formed frost.

REFERENCES:
patent: 4432211 (1984-02-01), Oishi et al.
patent: 4689965 (1987-09-01), Janke et al.
patent: 4916912 (1990-04-01), Levine et al.
patent: 4932217 (1990-06-01), Meyer

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