Defrost control method and apparatus of refrigerator

Details Defrost control method and apparatus of refrigerator Defrost control method and apparatus of refrigerator

1997-11-20

1999-03-30

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62155, 62156, F25D 2106

Patent

active

058874437

ABSTRACT:
A defrost control method and apparatus for a refrigerator having a defrosting heater for defrosting the evaporator. The method classifies a plurality of operating condition cases based on outside temperature of the cabinet and door opening number. Each of the operating condition cases has a predetermined severity factor. It is obtained a frosting weight for the unit time interval by multiplying a compressor operating time with the severity factor of the operating condition case. The frosting weights for a plurality of the unit time interval are accumulated and a defrosting operation is performed when the accumulated frosting weight exceeds a predetermined value.

REFERENCES:
patent: 4297852 (1981-11-01), Brooks
patent: 4327557 (1982-05-01), Clarke et al.
patent: 4481785 (1984-11-01), Tershak et al.
patent: 5228300 (1993-07-01), Shim
patent: 5483804 (1996-01-01), Ogawa et al.
patent: 5564297 (1996-10-01), Suse

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