Modulated throttling valve

Details Modulated throttling valve Modulated throttling valve

1975-05-02

1976-06-29

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

137491, F16K 3112, F25B 4104

Patent

active

039656934

ABSTRACT:
An automatically modulated suction throttling valve for an air conditioning system which during relatively high ambient temperature conditions maintains a first pressure level in the evaporator and during lower ambient temperature conditions maintains a higher second pressure level in the evaporator. The throttling valve includes a reciprocal piston valve movable in response to the difference between suction pressure and evaporator pressure to throttle refrigerant flow and maintain the evaporator pressure at a level to prevent frost formation. Pressure responsive means are provided to exert supplemental closing force on the piston valve to increase the evaporator pressure in response to decreasing suction line pressure.

REFERENCES:
patent: 3525234 (1970-08-01), Widdowson
patent: 3744268 (1973-07-01), Widdowson

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