Thermostatic expansion valve having operation reduced with influ

Details Thermostatic expansion valve having operation reduced with influ Thermostatic expansion valve having operation reduced with influ

1999-07-08

2000-09-05

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

061129984

ABSTRACT:
In a thermostatic expansion valve included in a refrigeration cycle for expansion of a refrigerant which is contained in the refrigeration cycle, the thermostatic expansion valve is provided with a particular chamber (14) which is substantially separated from a refrigerant passage (10, 11) for guiding the refrigerant and is connected to the refrigerant passage through an additional passage (15). The particular chamber has pressure relating to pressure in the refrigerant passage when the refrigeration cycle is operated. In order to reduce influence of the pressure in the refrigerant passage, a pressure transmission member (22) transmits the pressure in the particular chamber to a valve mechanism (200a, 201) which is placed in the refrigerant passage to adjust a flow of the refrigerant in the refrigerant passage. An operation control arrangement (205, 206, 207) controls an operation of the valve mechanism in response to temperature of the refrigerant.

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