Cooling coil and air distribution system defrost means

Details Cooling coil and air distribution system defrost means Cooling coil and air distribution system defrost means

1976-11-29

1977-12-06

Wayner, William E.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62180, F25D 2108

Patent

active

040614824

ABSTRACT:
A domestic refrigerator control arrangement for automatically defrosting the cabinet with a minimum of cycle time while obviating the buildup of frost within the cold air conduits. A defrost heater is located at the frontal area of the evaporator coils and the defrost thermostat on the rearward edge of the cross fins coil assembly in the air stream of the air circulating fan sensing the temperature of the air exiting the evaporator. The fan is wired in series with the defrost thermostat and operates upon the energization of the defrost heater, while being deenergized upon the opening of the defrost thermostat contacts at the end of the defrost period. The fan remains in its off position until the defrost thermostat recloses, insuring that moisture-laden air is not distributed throughout the refrigerator.

REFERENCES:
patent: 2907180 (1959-10-01), Mann
patent: 3126716 (1964-03-01), De Witte
patent: 3189085 (1965-06-01), Eberhart
patent: 3316729 (1967-05-01), Mann et al.
patent: 3922874 (1975-12-01), Canter

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