JPH01106684U

JPH01106684U -

Info

Publication number: JPH01106684U
Application number: JP228588U
Authority: JP
Priority date: 1988-01-11
Filing date: 1988-01-11
Publication date: 1989-07-18

Description

[Brief explanation of drawings]

第１図はこの考案の温度弁の一実施例を示す縦
断面図、第２図は上記温度弁を適用した冷凍装置
の冷媒回路図、第３図は上記温度弁における冷媒
温度と開閉作動との関係を示すグラフ、第４図は
従来の温度弁の部分断面図である。１１…温度弁、１５…弁本体、１６…入口通路
（第１通路）、１７…出口通路（第２通路）、１
８…流路、１９…弁座、２０…筒状体、２１…弁
体、２３…均圧室、２４…均圧孔（均圧路）、２
５…導通孔（導通部）、３０…形状記憶合金バネ
（弁体駆動手段）、３１…連通部。 Fig. 1 is a longitudinal sectional view showing an embodiment of the temperature valve of this invention, Fig. 2 is a refrigerant circuit diagram of a refrigeration system to which the above temperature valve is applied, and Fig. 3 shows the refrigerant temperature and opening/closing operation of the above temperature valve. FIG. 4 is a partial cross-sectional view of a conventional temperature valve. 11... Temperature valve, 15... Valve body, 16... Inlet passage (first passage), 17... Outlet passage (second passage), 1
8...Flow path, 19...Valve seat, 20...Cylindrical body, 21...Valve body, 23...Pressure equalization chamber, 24...Pressure equalization hole (pressure equalization path), 2
5... Conduction hole (conduction part), 30... Shape memory alloy spring (valve body driving means), 31... Communication part.

Claims

[Scope of utility model registration request]

The valve body 15 has a first passage 16 and a second passage 17.
and a flow passage 18 that communicates both passages 16 and 17.
A valve seat 19 is provided in the flow path 18, and a bottomed cylindrical body 20 is connected to the opening of the bottomed cylindrical body 20 at a position closer to the first passage 16 than the valve seat 19.
The valve body 21 is supported in the cylindrical body 20.
are slidably arranged so that the tip of the valve body 21 can freely come into contact with and separate from the valve seat 19, and
A pressure equalizing passage 24 is formed in the valve body 21 to communicate a pressure equalizing chamber 23 formed on the proximal end side of the valve body 21 within the cylindrical body 20 with the second passage 17 side. The pressure equalizing chamber 23 is connected to the first passage 1 in the body 20.
A conductive portion 25 is formed which communicates with the pressure equalizing passage 24 and has a smaller passage area than the pressure equalizing passage 24.
In the path from the conduction portion 25 to the pressure equalization chamber 23, the pressure equalization passage 24, and the second passage 17 side, there is a valve body driving means 30 made of a shape memory alloy whose shape changes with temperature changes.
is arranged so that the valve body 21 is driven by the shape change of the valve body driving means 30 according to the temperature change of the fluid flowing through the path, so that the tip thereof comes into contact with and separates from the valve seat 19. Further, on the opening side of the cylindrical body 20, when the distal end of the valve body 21 is separated from the valve seat 19, the outer circumferential side circulation portion of the cylindrical body 20 is connected through the valve seat 19. A temperature valve characterized in that a communication portion 31 is formed to communicate with the second passage 17 side.