Temperature responsive expansion valve

Details Temperature responsive expansion valve Temperature responsive expansion valve

1981-08-05

1982-09-07

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, 137503, F25B 4104

Patent

active

043479774

ABSTRACT:
A temperature responsive expansion valve. The opening degree of a first valve body is adjusted by comparing an actual superheating degree with a predetermined reference superheating degree. A temperature responsive expansion valve comprises a valve needle disposed within the first valve body, said valve needle being driven by a difference between the refrigerant pressure on the primary side and the refrigerant pressure on the secondary side, said valve needle moving to enlarge the area of flow path within the valve opening when the pressure differential between the primary and secondary sides is smaller than a predetermined reference value.

REFERENCES:
patent: 1990663 (1935-02-01), Muffly
patent: 2297872 (1942-10-01), Carter et al.
patent: 2298150 (1942-10-01), Newton
patent: 2463951 (1949-03-01), Carter
patent: 2506724 (1950-05-01), Lindgren
patent: 3099140 (1963-07-01), Leimbach
patent: 3111816 (1963-11-01), Tilney et al.
patent: 3138174 (1964-06-01), Gilpin

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