JPH0468264U

JPH0468264U -

Info

Publication number: JPH0468264U
Application number: JP11227990U
Authority: JP
Priority date: 1990-10-25
Filing date: 1990-10-25
Publication date: 1992-06-17

Description

[Brief explanation of drawings]

第１図は、この考案の一実施例による四方切換
弁で、冷房運転時のヒーター非通電状態を示す縦
断面図。第２図は、第１図に示す四方切換弁で、
冷房→暖房切換時のヒーター通電電状態を示す縦
断面図。第３図は、第１図に示す四方切換弁で、
暖房運転時のヒーター非通電状態を示す縦断面図
。第４図は、第１図に示す四方切換弁で、暖房→
冷房切換時のヒーター通電状態を示す縦断面図。
第５図は、本考案に係る四方切換弁のバルブスラ
イドの拡大斜視図。第６図は、本考案に係るエン
ドレス状のラチエツトを展開した拡大断面図。第
７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……復帰ばね、２
３……円板状のストツパー、２４，３８……ブラ
ケツト、２６……筒状のストツパー、２９……凹
溝、３０……ラチエツト、３１……アーム、３２
……爪、３４……ヒーター、３５……ワツクスサ
ーモエレメント。 FIG. 1 is a longitudinal cross-sectional view of a four-way switching valve according to an embodiment of the invention, showing a state in which the heater is not energized during cooling operation. Figure 2 shows the four-way switching valve shown in Figure 1,
FIG. 3 is a vertical cross-sectional view showing the heater energization state when switching from cooling to heating. Figure 3 shows the four-way switching valve shown in Figure 1,
FIG. 3 is a vertical cross-sectional view showing a state in which the heater is not energized during heating operation. Figure 4 shows the four-way switching valve shown in Figure 1, with heating →
FIG. 6 is a vertical cross-sectional view showing the heater energization state when switching to air conditioning.
FIG. 5 is an enlarged perspective view of the valve slide of the four-way switching valve according to the present invention. FIG. 6 is an expanded sectional view of the endless ratchet according to the present invention. FIG. 7 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 ... Return spring, 2
3... Disk-shaped stopper, 24, 38... Bracket, 26... Cylindrical stopper, 29... Concave groove, 30... Ratchet, 31... Arm, 32
...nail, 34...heater, 35...wax thermoelement.

Claims

[Claims for Utility Model Registration] A four-way switching system in which a valve slide 11 is provided on the upper surface of a valve seat 10 disposed in the cylinder 2 and is slidable left and right via a bracket 24 connected to a drive source. In the valve, at the right end of the cylinder 2, there is a wax thermoelement 35 having the shaft 20 at its axial center, and a heater 34 provided to cover the outer circumference of the wax thermoelement 35.
The valve slide 11 is provided with an endless heart-shaped recessed groove 29 on its upper surface, and a ratchet 30 having a sawtooth cross section is provided in the recessed groove 29 in a fixed direction and endlessly. a valve seat 1 disposed in the cylinder 2;
A hollow plate-shaped stopper 21 is fixed to the right end of the shaft 20, and a disc-shaped stopper 23 is fixed near the left end of the shaft 20 whose left end faces into the cylinder 2. 2
A return spring 22 is provided between 1 and 23, and a flange 27a is provided at the left end of the cylinder 2.
A cylindrical end cover 27 is fixed, and a cylindrical stopper 26 is slidably provided inside this end cover via an auxiliary spring 28, so that the valve slide 11 can slide in the left and right direction. A bracket 24 having a planar U-shaped notch 25 at its tip is integrally fixed to the left end of the shaft 20, and this notch 25 is arranged so as to straddle both sides of the valve slide 11. A bracket 38 having a planar U-shaped notch 37 at its tip is also integrally fixed to the center of the right end of the cylindrical stopper 26, and this notch 37 is extended over both sides of the valve slide 11. The flange 27a of the cylindrical end cover 27
A flexible arm 31 having a pin-shaped claw 32 at the tip is provided on the inner surface, and the lower end of the claw 32 is engaged with the ratchet 30 in the groove 29. Four-way switching valve.