Flow regulating valve apparatus for air conditioning systems

Details Flow regulating valve apparatus for air conditioning systems Flow regulating valve apparatus for air conditioning systems

1998-10-01

2000-05-09

Tapolcai, William E.

Refrigeration

Automatic control

Refrigeration producer

236 93R, 236101D, G05D 2308

Patent

active

06058730&

ABSTRACT:
A flow regulating valve (100) for an air conditioning system is shown in which a body member (104) is provided with a fixed passageway (104a) and a variable passageway (104b) which results in regulating flow of refrigerant into the evaporator of the air conditioning system. Under high ambient and low or idle speeds, the system refrigerant pressure rises. This increases pressure in the evaporator and an increase in the saturation temperature of refrigerant in the evaporator. This increase in temperature is sensed by a helical thermostatic metal element (110) which moves to rotate an inlet sleeve (112) having a web (104c) formed between first and second windows (112a, 112b) to move into alignment with the inlet port (104c) of passageway (104b) to increase restriction to the flow of the refrigerant fluid through the valve thereby decreasing pressure of the refrigerant entering the evaporator. Upon continued increase in ambient temperature, the web continues to rotate bringing window (112b) into alignment with the inlet (104c) to increase refrigerant flow to prevent excessive pressure build-up in the compressor with resulting compressor cycling.

REFERENCES:
patent: 3008697 (1961-11-01), Dermond
patent: 3295759 (1967-01-01), Wing
patent: 4783000 (1988-11-01), Ty
patent: 5110045 (1992-05-01), Giasson et al.
patent: 5479786 (1996-01-01), Giasson et al.

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