Fan control system for the evaporator of refrigerating appliance

Details Fan control system for the evaporator of refrigerating appliance Fan control system for the evaporator of refrigerating appliance

1994-09-23

1996-02-13

Tanner, Harry B.

Refrigeration

Automatic control

Of external fluid or means

62131, 62209, F25D 1706

Patent

active

054903947

ABSTRACT:
A fan control system for the evaporator of refrigerating appliances, of the type in which the internal air is forced to circulate, by action of a fan (20), through the evaporator (30) of a refrigerating circuit, fed by a compressor (40), the system comprising: a first temperature sensing means (S1), detecting the temperature of the circulating air at the air inlet of the evaporator (30); a second temperature sensing means (S2), detecting the temperature of the evaporator (30); and a control circuit (50), producing: a fan stop control signal, when the difference between the values of the temperatures detected by the first and second sensors (S1, S2) reaches a stop value, below which the heat transfer from the forced circulating air to the evaporator is lower than the heat transfer from the fan (20) to the air; and a fan start control signal, when the difference of temperatures reaches a certain start value corresponding to a temperature of the evaporator (30) substantially lower than the temperature of the air in the internal medium.

REFERENCES:
patent: 4941325 (1990-07-01), Nuding
patent: 4949548 (1990-08-01), Meyer
patent: 5142880 (1992-09-01), Bellis
patent: 5228307 (1993-07-01), Koce
patent: 5269152 (1993-12-01), Park

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