Defrost control apparatus and method for a refrigerating system

Details Defrost control apparatus and method for a refrigerating system Defrost control apparatus and method for a refrigerating system

1992-01-30

1993-10-12

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62140, F25D 2102

Patent

active

052514544

ABSTRACT:
A thermistor is mounted between the fins of an evaporator. The thermistor senses the temperature about the evaporator when a blow fan mounted at the evaporator is driven and when it halts. The two sensed temperatures are compared, so that when the difference of the two temperatures is below a first set value, a defrost operation starts. When the temperature about the evaporator is above a second set value, the defrost operation is completed.

REFERENCES:
patent: 2104219 (1938-01-01), Bloom
patent: 3362183 (1968-01-01), Sutton, Jr.
patent: 4045971 (1977-09-01), Brenner, Jr.
patent: 4345441 (1982-08-01), Hansen
patent: 4843833 (1989-07-01), Polkinghorne
patent: 4974417 (1990-12-01), Levine et al.

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