Refrigeration – Automatic control – Refrigeration producer
Patent
1997-06-30
1998-10-27
Joyce, Harold
Refrigeration
Automatic control
Refrigeration producer
62222, 236 92B, F25B 500
Patent
active
058264388
ABSTRACT:
According to the present invention, in an expansion valve integrated with a electromagnetic valve, there are provided an inlet refrigerant path, a restriction path for decompressing and expanding the refrigerant from the inlet refrigerant path, a valve element for adjusting an opening degree of the restriction path, a diaphragm operating unit, and an outlet refrigerant path for supplying the refrigerant decompressed and expanded in the restriction path to an evaporator. The outlet refrigerant path is opened or closed by the electromagnetic valve 200. When the electromagnetic valve 20 is closed, the diaphragm operating unit operates to close the valve element in the restriction path, based on the refrigerant pressure between the valve element of the electromagnetic and the restriction path. In this way, it is possible to reduce the noise of the refrigerant when the electromagnetic valve is closed.
REFERENCES:
patent: 2936790 (1960-05-01), Dahl et al.
patent: 5156016 (1992-10-01), Day
patent: 5385035 (1995-01-01), Nishida et al.
patent: 5588590 (1996-12-01), Sakakibara et al.
patent: 5675982 (1997-10-01), Kirol et al.
Miyata Yoshio
Ohishi Shigeji
Denso Corporation
Joyce Harold
Tinker Susanne C.
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