JPH0411366U

JPH0411366U -

Info

Publication number: JPH0411366U
Application number: JP5057590U
Authority: JP
Priority date: 1990-05-14
Filing date: 1990-05-14
Publication date: 1992-01-30

Description

[Brief explanation of the drawing]

第１図は、本発明の実施例の正面断面図、第２
図は、その部分拡大図、第３図は、従来例の部分
拡大断面図である。１……膨張弁、１２……低圧通路、１３……断
熱膨張させるための通路、２０……弁機構、３０
……感温室、５０……シール機構、５１……Ｏリ
ング、５３……コイルスプリング、５６……テー
パ面。 FIG. 1 is a front sectional view of an embodiment of the present invention, and FIG.
The figure is a partially enlarged view, and FIG. 3 is a partially enlarged sectional view of the conventional example. DESCRIPTION OF SYMBOLS 1... Expansion valve, 12... Low pressure passage, 13... Passage for adiabatic expansion, 20... Valve mechanism, 30
... Sensitive chamber, 50 ... Seal mechanism, 51 ... O ring, 53 ... Coil spring, 56 ... Tapered surface.

Claims

[Claims for Utility Model Registration] A low-pressure passage connected to an evaporator and an outlet for passing a low-temperature, low-pressure refrigerant; a passage connected to an inlet of the evaporator for adiabatically expanding the high-temperature and high-pressure refrigerant; The passage for adiabatic expansion is driven by a sensitive chamber whose pressure increases and decreases depending on the temperature change of the refrigerant in the low pressure passage, and a rod that slides in the axial direction as the pressure increases and decreases in the temperature sensitive chamber. and a sealing O-ring press-welded to the outer periphery of the rod in order to prevent refrigerant from leaking between the two passages along the outer periphery of the rod, A biasing means for biasing the O-ring in the axial direction of the rod is provided, and a wall surface against which the O-ring is pressed by the biasing means is formed into a tapered surface whose diameter gradually becomes smaller. expansion valve.