Compressor protection from liquid hazards

Details Compressor protection from liquid hazards Compressor protection from liquid hazards

2005-05-03

2005-05-03

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S472000, C417S013000, C417S281000

Reexamination Certificate

active

06886354

ABSTRACT:
Two liquid levels are sensed in the oil sump of a compressor to determine if sufficient oil and excess refrigerant are present prior to starting the compressor and appropriate steps taken, if necessary. At start-up, and during operation, the presence or flow of liquid refrigerant in the suction of the compressor is sensed and appropriate steps taken, if necessary.

REFERENCES:
patent: 3577741 (1971-05-01), Shaw
patent: 3766747 (1973-10-01), Parker
patent: 5062277 (1991-11-01), Heitmann et al.
patent: 5252036 (1993-10-01), Bunch et al.
patent: 5327997 (1994-07-01), Nash et al.
patent: 6302654 (2001-10-01), Millet et al.
patent: 20030077179 (2003-04-01), Collins et al.
patent: 2219661 (1989-12-01), None
James Solberg, Norman R. Miller and Predrag Hrnjak “A Sensor for Estimating the Liquid Mass Fraction of the Refrigerant Exiting an Evaporator” Society of Automotive Engineers, Paper 2000-01-0976, 2000.

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