Method for controlling a dew prevention heater for a refrigerato

Refrigeration – Processes – Defrosting or frost inhibiting

Patent

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Details

62150, 62275, F25D 2104

Patent

active

055422586

ABSTRACT:
A refrigerator includes a freezing compartment and refrigerating compartment. Dew prevention heaters are provided for the respective compartments. The dew prevention heater for the freezing compartment cannot be activated if the freezer temperature is above 0.degree. C., but it can be activated if that temperature is below 0.degree. C. as follows: if the compressor is on, then the heater is always on; and if the compressor is off, then the heater will cycle on and off at a frequency dependent upon the magnitude of the temperature outside of the refrigerator. The activation of the dew prevention heater for the refrigerating compartment is independent of the temperature of the refrigerating compartment. Rather, that heater is "off" if the compressor is "off", and if the compressor is "on", the heater will cycle on and off at a frequency dependent upon the temperature outside of the refrigerator.

REFERENCES:
patent: 3859502 (1975-01-01), Heaney
patent: 3939666 (1976-02-01), Bashark
patent: 4127765 (1978-11-01), Heaney
patent: 4261179 (1981-04-01), Dageford
patent: 4341089 (1982-07-01), Ibrahim et al.
patent: 4862701 (1989-09-01), Small et al.

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