Household refrigerator defrost system
AssigneeGeneral Electric Company
InventorJulius B. Horvay
Life of this patent
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Abstract
A refrigerator including a compressor, an evaporator and a condenser with a temperature control to energize and de-energize the compressor. There is an electrical defrost heater for periodically warming the evaporator to defrost temperatures which is energized and de-energized by an electrical motor-driven defrost control timer having a predetermined period of run time between initiation of each successive defrost cycle. The defrost control timer is energized to run only when the compressor is energized and the defrost control timer is delayed in running for a period of time each time the compressor is energized.
Claims3
In a refrigerating system including a compressor, an evaporator and a condenser;
- (a) temperature control means to energize and de-energize the compressor,
- (b) an electrical defrost heater for periodically warming the evaporator to defrost temperatures,
- (c) an electrical motor-driven defrost control timer to energize and de-energize the defrost heater and having a predetermined period of run time between initiation of each successive defrost cycle,
- (d) means to energize and run the defrost control timer only when the compressor is energized, and
- (e) means to automatically delay the running of the defrost control timer for a fixed period of time each time the compressor is energized.
Dependencies are inferred from the claim text.