Method and apparatus for controlling the operation of a compress

Details Method and apparatus for controlling the operation of a compress Method and apparatus for controlling the operation of a compress

1982-03-29

1984-04-24

Makay, Albert J.

Refrigeration

Processes

Lubricant handling

62158, 62193, 62468, 184 622, F25B 4302, F01M 500

Patent

active

044440170

ABSTRACT:
A method for controlling the energization of a crankcase heater for use in a refrigeration circuit is disclosed. The crankcase heater is energized through normally closed relay contacts except when the compressor is operating and except for a delay period after compressor operation. A microprocessor control is utilized to calculate the delay period based on the length of the period of compressor operation and to control the energization of the crankcase heater.

REFERENCES:
patent: 3312081 (1967-04-01), Berger et al.
patent: 3377816 (1968-04-01), Berger
patent: 3577741 (1971-05-01), Shaw
patent: 4066869 (1978-01-01), Apaloo et al.
patent: 4208883 (1980-06-01), Stirling
patent: 4378486 (1983-03-01), Yunik et al.

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