Refrigerator with lubricant mixture sensor

Details Refrigerator with lubricant mixture sensor Refrigerator with lubricant mixture sensor

1991-12-30

1993-01-05

Rivell, John

Refrigeration

Automatic control

Refrigeration producer

62126, 622281, F25B 3102

Patent

active

051760070

ABSTRACT:
A refrigerator having a refrigerant circulating circuit for circulating a mixture of a refrigerant and a refrigerating machine oil. The refrigerator includes a compressor with a bypass circuit or a variable displacement compressor, a state detecting sensor for sensing the degree of separation of the refrigerant mixture, determining circuit for determining whether the detected degree of separation is in a two phase separation area, and a control unit for controlling the amount of the refrigerant passing through the bypass circuit or the displacement of the variable displacement compressor. When the refrigerant mixture enters into the two phase separation area, the amount of discharge or the displacement of the compressor is decreased. The temperature of refrigerant mixture is lowered accordingly and the phase changes from the two phase separation area. The refrigerating machine oil is maintained in a uniformly mixed state with the refrigerant and circulates with the refrigerant to the compressor. As a result, a lock up or breakage of the compressor is prevented.

REFERENCES:
patent: 3477240 (1969-11-01), Thoren et al.
patent: 4344293 (1982-08-01), Fujiwara et al.
patent: 4526012 (1985-07-01), Chigira
patent: 4633675 (1987-01-01), Sato
patent: 4966013 (1990-10-01), Wood
patent: 5054294 (1991-10-01), Dudley

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