JPH03119689U

JPH03119689U -

Info

Publication number: JPH03119689U
Application number: JP3017190U
Authority: JP
Priority date: 1990-03-22
Filing date: 1990-03-22
Publication date: 1991-12-10

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例による通電時の
四方切換弁を示す縦断面図。第２図は、この考案
の一実施例による非通電時の四方切換弁を示す縦
断面図。第３図は、この考案の他の実施例による
ワツクスサーモエレメント部分を示す縦断面図。
第４図は、冷凍サイクル中における従来の四方切
換弁を示す縦断面図である。２……シリンダ、１０……バルブシート、１１
……バルブスライド、２０……シヤフト、２１…
…中空板状のストツパー、２２……バイアスバネ
、２３……円板状のストツパー、２４，３３……
ＰＴＣセラミツクヒーター、２５……ケース、２
８……ワツクス、３１……ワツクスサーモエレメ
ント、３２……気密封止用端子。 FIG. 1 is a longitudinal sectional view showing a four-way switching valve when energized according to an embodiment of the invention. FIG. 2 is a longitudinal cross-sectional view showing a four-way switching valve in a non-energized state according to an embodiment of the invention. FIG. 3 is a longitudinal sectional view showing a wax thermoelement portion according to another embodiment of the invention.
FIG. 4 is a longitudinal sectional view showing a conventional four-way switching valve during a refrigeration cycle. 2...Cylinder, 10...Valve seat, 11
...Valve slide, 20...Shaft, 21...
...Hollow plate-shaped stopper, 22... Bias spring, 23... Disc-shaped stopper, 24, 33...
PTC ceramic heater, 25...case, 2
8... Wax, 31... Wax thermoelement, 32... Hermetic sealing terminal.

Claims

[Claims for Utility Model Registration] 1 Valve seat 10 disposed in cylinder 2
A four-way switching valve is provided with a valve slide 11 on the top surface of which is slidable left and right via a shaft 20 connected to a drive source, comprising: a valve seat 1 disposed within the cylinder 2;
A hollow plate-shaped stopper 21 is fixed to the right end of the valve slide 11, and a disk-shaped stopper 23 is fixed to the approximate center of the shaft 20 connected to the valve slide 11. A bias spring 22 is provided, and a wax 28 is sealed in a case 25 at the right end of the cylinder 2, and a PTC is installed on the outer periphery.
A four-way switching valve characterized in that a wax thermoelement 31 provided with a ceramic heater 24 is provided, and the expansion or contraction of the wax 28 is transmitted to the end of the shaft 20 via a seal packing 27. 2. The four-way switching valve according to claim 1, characterized in that a PTC ceramic heater 33 is provided in the case 25 of the wax thermoelement 31 together with the wax 28.