Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1998-12-22
2000-03-07
Tanner, Harry B.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62155, 62156, 62180, F25B 4702
Patent
active
060324716
ABSTRACT:
The invention provides a method of defrosting a frost load accumulated on an evaporator, the method comprising the steps of: performing a normal mode for controlling ON-OFF operations of the compressor; sensing a temperature of the evaporator, comparing the sensed temperature with a first preset temperature to thereby determine a significant amount of frost; if the sensed temperature is less than the first preset temperature, removing the frost by activating the fan and the heater for a predetermined duration; determining whether or not the fan should be activated during the defrost mode, by sensing and comparing temperatures outside/inside the refrigerator, and a total number of instances of a refrigerator door opening and closing; checking whether or not the duration has elapsed, and if the duration has not elapsed, continuously activating the heater; and de-activating the heater if the duration has elapsed and performing the normal mode.
REFERENCES:
patent: 5564286 (1996-10-01), Suse
patent: 5673565 (1997-10-01), Jeong et al.
patent: 5887443 (1999-03-01), Lee et al.
patent: 5924298 (1999-07-01), Yoo
Daewoo Electronics Co. Ltd.
Tanner Harry B.
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