Automatic refrigerant charge variation means

Details Automatic refrigerant charge variation means Automatic refrigerant charge variation means

1991-05-14

1992-08-25

Wayner, William E.

Refrigeration

Automatic control

Trapping and discharging refrigerant batches

623244, F25B 4100

Patent

active

051408279

ABSTRACT:
A heat pump system that includes a compressor, an outdoor heat exchanger and an indoor heat exchanger is provided with automatic refrigerant charge adjustment. A refrigerant reservoir has an inlet branch coupled to a liquid refrigerant line between the two heat exchangers and a discharge branch that is coupled to the suction line that feeds low pressure vapor to the compressor. Solenoid valves on the two branches are controlled by a thermostat that is in thermal contact with the discharge line from the compressor. If the discharge temperature is low, refrigerant liquid is transferred to the reservoir. If the discharge temperature is high, the refrigerant is injected into the suction gas.

REFERENCES:
patent: 3238737 (1966-03-01), Shrader et al.
patent: 4299098 (1981-11-01), DeRosier
patent: 4528822 (1985-07-01), Glamm
patent: 4765149 (1988-08-01), Shiga et al.
patent: 4893476 (1990-01-01), Bos et al.

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