Defrosting method and apparatus for refrigerator using GA-fuzzy

Details Defrosting method and apparatus for refrigerator using GA-fuzzy Defrosting method and apparatus for refrigerator using GA-fuzzy

1995-09-20

1997-09-16

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62156, F25D 2106

Patent

active

056668163

ABSTRACT:
There are described a defrosting method and apparatus of a refrigerator using a GA-fuzzy theory. The defrosting method comprises the steps of: inputting reference learning data by experiment and actual data to a microcomputer; inferring frost-quantity on an evaporator from the input data by using the GA-fuzzy theory; calculating a defrosting period from the frost amount; and controlling a defrosting heater depending on said defrosting period. According to the present invention, a refrigerator can be defrosted by calculating the frost-quantity on the evaporator with precision and accuracy even at an input function which has many inflexion points and is impossible to differentiate, which is different from the conventional defrosting method using the crisp's logical algorithm consisting of `0` and `1`.

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patent: 3839878 (1974-10-01), Tilmanis
patent: 4129993 (1978-12-01), Schotten
patent: 5379608 (1995-01-01), Ishimaru et al.
patent: 5493867 (1996-02-01), Szynal et al.

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