Refrigeration – Automatic control – Of external fluid or means
Patent
1979-12-31
1982-02-16
Wayner, William E.
Refrigeration
Automatic control
Of external fluid or means
62186, 73362AR, F25D 1700, G01K 700
Patent
active
043154131
ABSTRACT:
A room air conditioner includes a variable speed eevaporator fan and a compressor selectively energized by a temperature control system. An ambient temperature sensor monitors the temperature of the room and an evaporator temperature sensor monitors the temperature of the evaporator. In an automatic mode of operation, the evaporator fan speed and compressor energization depend upon the difference between the ambient temperature and a set point temperature as determined by the position of a slide switch with multiple contacts each of which correspond to a stored set point value. The ambient and evaporator temperatures are determined by a linearization computation which utilizes a capacitor sequentially charged through the reference resistor and the ambient thermistor and the evaporator thermistor. The compressor is cycled off when the evaporator temperature falls below a certain value, and the compressor is held off for a fixed period of time after it has been de-energized to prevent short cycling or lockup.
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Roshida Instruction Manual, 4/1978.
Wayner William E.
Whirlpool Corporation
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