Expansion valve

Details Expansion valve Expansion valve

1997-08-21

2000-05-02

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

060562021

ABSTRACT:
An expansion valve includes a valve body, a valve, a power element, and an aluminum heat sensing shaft. The heat sensing shaft has a hole with a bottom reaching a heat sensing portion thereof. The hole makes the heat transfer area of the heat sensing shaft small. Consequently, in a refrigeration system the response of the expansion valve is relatively insensitive to changes in a heat load of an evaporator. Thus, unwanted hunting phenomenon in the refrigeration system is prevented.

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patent: 5060485 (1991-10-01), Watanabe et al.
patent: 5127237 (1992-07-01), Sendo et al.
patent: 5228619 (1993-07-01), Yano et al.
patent: 5297728 (1994-03-01), Yano et al.
patent: 5303864 (1994-04-01), Hirota
patent: 5361597 (1994-11-01), Hazime et al.

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