Defroster for a refrigerator

Details Defroster for a refrigerator Defroster for a refrigerator

1982-12-06

1984-02-28

Makay, Albert J.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62156, F25D 2106

Patent

active

044335555

ABSTRACT:
The invention relates to refrigerator apparatus and particularly to the defrosting thereof. The thermostat is responsive to evaporator temperature and has first and second displacement ranges for respectively controlling the normal operation and the defrosting operation via first and second switches. A counter counts the cyclical operations of the first switch and at a predetermined count actuates an interrupter switch which is effective to block power to the compressor motor and direct power to the defroster heating apparatus. At a predetermined evaporator temperature the second switch is actuated which serves to reset the counter and this has the effect of ending the defrost cycle and returning the apparatus to normal operation under the control of the first switch.

REFERENCES:
patent: Re20212 (1936-12-01), Raney
patent: 2095014 (1937-10-01), Stark
patent: 2708348 (1955-05-01), Philipp
patent: 3022640 (1962-02-01), Hubacker
patent: 4169358 (1979-10-01), Hansen et al.

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