Defrosting controller for refrigeration systems

Details Defrosting controller for refrigeration systems Defrosting controller for refrigeration systems

1990-06-20

1991-09-10

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62156, F25D 2106

Patent

active

050463241

ABSTRACT:
A defrosting controller for use with a refrigeration system determines calculating a frost melting period from the measurements of the evaporator temperature during defrosting by means of an evaporator temperature sensor, establishes a refrigerating operation rate which is the ratio of the period of the frost melting process to the (total) open period of an electronic motor-driven valve during the refrigeration, and then decides whether the next defrosting operation is to be skipped or not.

REFERENCES:
patent: 4156350 (1979-05-01), Elliott et al.
patent: 4173871 (1979-11-01), Brooks
patent: 4297852 (1981-11-01), Brooks
patent: 4528821 (1985-07-01), Tershak et al.
patent: 4938027 (1990-07-01), Midlang

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