Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1996-10-11
1998-01-20
Tapolcai, William E.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62156, 62234, F25D 2106
Patent
active
057090963
ABSTRACT:
The object of the present invention is to provide a defrosting device, for a low temperature display case, that can effectively prevent incomplete defrosting, and that can reduce the temperature increase in a storage chamber during defrosting to the minimum.
According to the present invention, a defrosting device comprises: defrosting heaters provided in a duct; a first defrost recovery temperature sensor for detecting an air temperature in the duct; a second defrost recovery temperature sensor for detecting a temperature at the evaporator; and a controller for, during a defrosting operation for the evaporator, rendering the defrosting heaters conductive, supplying a high temperature refrigerant to the evaporator, and for rendering the defrosting heaters nonconductive, based on an output of the first defrost recovery temperature sensor, and halting a flow of the high temperature refrigerant to the evaporator, based on an output of the second defrost recovery temperature sensor.
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Nakano Hirotaka
Sagara Hisao
Tamai Hirokuni
Sanyo Electric Company Ltd.
Tapolcai William E.
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