Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1980-07-17
1981-11-03
Wayner, William E.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62155, F25D 2106
Patent
active
042978521
ABSTRACT:
Door open time in an automatic defrost refrigerator is accumulated in the memory of a microcomputer. Normal cycling of defrost is delayed by inactivating the defrost timer during periods of light usage of the refrigerator until a minimum predetermined accumulated door open time is reached. Provision is made for sensing interior refrigerator temperature to override the delaying effect of the door open measurement when a sensed over-temperature condition indicates an abnormal build-up of frost on the evaporator coils even though the refrigerator is experiencing relatively light usage. A maximum compressor run time interval between defrost cycles is provided for when no door openings occur, as during vacation periods.
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General Electric Company
Reams Radford M.
Tanner Harry
Wayner William E.
Weidner Frederick P.
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