Crankcase heater control for hermetic refrigerant compressors

Details Crankcase heater control for hermetic refrigerant compressors Crankcase heater control for hermetic refrigerant compressors

1990-09-21

1991-05-07

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62472, F25B 4302

Patent

active

050126520

ABSTRACT:
The temperature is sensed at the compressor, indoor coil and outdoors. The sensed temperatures are compared and if the compressor temperature is not a specified amount higher than the lower of the other two sensed temperatures, then the crankcase heater is energized. When the compressor temperature rises to or is a specified amount above the lower of the other two temperatures, the crankcase heater is deenergized.

REFERENCES:
patent: 3705499 (1972-12-01), Mount et al.
patent: 4066869 (1978-01-01), Apaloo et al.
patent: 4208883 (1980-06-01), Stirling
patent: 4236379 (1980-12-01), Mueller
"Slugging Prevention-Liquid Refrigerant Control in Refrigeration, A/C Systems", Air Conditioning, Heating & Refrigeration News, Aug. 27, 1990, pp. 28-30.

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