Electric refrigerator having improved freezing and defrosting ch

Details Electric refrigerator having improved freezing and defrosting ch Electric refrigerator having improved freezing and defrosting ch

1984-07-24

1986-02-11

Tanner, Harry

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62199, F25D 2106

Patent

active

045692050

ABSTRACT:
An electric refrigerator is designed to comprise a freezing chamber provided with a gas duct for drawing off a cooling gas from the freezing chamber and refluxing the cooling gas thereto. A main freezing evaporator is provided in the gas duct to freeze foodstuff stored in the freezing chamber by circulating a cooling gas through the freezing chamber and gas duct. The refrigerator also comprises an auxiliary shelf-shaped freezing evaporator for directly freezing the foodstuff placed thereon in all directions. A damper unit involved in the refrigerator mechanically operates a gas circulation valve provided in the gas duct. During the defrosting mode, the freezing evaporators are rendered inoperative, and the main freezing evaporator is heated to remove frost deposited thereon. During this interval, the damper unit causes the gas circulation valve to close the gas duct. As a result, steam produced by the frost melting from the main freezing cooler is prevented from entering the freezing chamber through the gas duct and being frozen on the surface of the main freezing evaporator.

REFERENCES:
patent: 4227379 (1980-10-01), Oonishi
patent: 4270364 (1981-06-01), Oonishi et al.
patent: 4327556 (1982-05-01), Zampini et al.

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