JPH0324947Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of the invention is to expand the flow path in the valve chamber and to reduce the resistance when the valve element moves up and down, mainly for electromagnetic valves used in windshield fluid switching devices in automobiles, etc. This is what we are trying to reduce.

In a conventional electromagnetic valve of this type, a side wall 2 within a valve chamber 1 serves as a guide for vertical movement of a valve plate 3, as shown in FIG.

Therefore, in order to enlarge the flow path, it is necessary to increase the diameter of the valve chamber 1 or reduce the diameter of the valve plate 3, but with these methods, the gap between the valve plate 3 and the side wall 2 increases. This has the disadvantage that the operation of the valve plate 3 becomes unstable. Further, since the valve plate 3 and the side wall 2 of the valve chamber 1 are in contact with each other at an arcuate portion, when liquid enters the valve plate 3, the viscous resistance of the liquid acts, resulting in resistance to the operation of the valve plate 3. Furthermore, the valve plate 3 and the side wall 2 of the valve chamber 1
If dirt, sand, etc. gets into the gap between the
There was also a drawback that the valve plate 3 was forced to stop because there was no place for sand etc. to escape.

In order to achieve the above-mentioned purpose, the present invention expands the flow path inside the valve chamber and operates the valve element by providing a plurality of pins as guide members for guiding the valve element inside the valve wall surface inside the valve chamber. It is designed to facilitate the process.

Preferred embodiments (FIGS. 1 and 2) will be illustrated and described below.

Reference numeral 10 indicates the entire electromagnetic valve, and the valve housing 11 has a liquid inlet 12, a first liquid outlet 13, and a second liquid outlet 1.
4 are provided respectively.

Reference numeral 15 denotes a disk-shaped valve element placed in the valve chamber 16 of the valve housing 11, and is made of a magnetic material.

The valve element 15 always closes the lower valve port 18 communicating with the second liquid outlet 14 due to the expansion elasticity of the coil spring 17. Reference numeral 19 denotes an annular valve wall surface 20 and upper and lower valve ports 24, which will be described later.
18, a plurality of valve element guide members are arranged concentrically and in parallel in the axial direction, and specifically constitute pins. Reference numeral 23 denotes a gap between the arcuate portion 22 of the valve element 15 and the valve wall surface 20, which substantially expands the flow path to reduce flow loss due to resistance, and prevents problems caused by dust or sand, such as when the valve element 15 becomes locked. It has the function of preventing Reference numeral 24 denotes an upper valve port communicating with the first liquid outlet 13, which is normally opened by the expansion elasticity of the coil spring 17 described above. Reference numeral 25 denotes an electromagnetic coil wound around a yoke 26, which attracts the valve element 15 in the direction of arrow A when energized, compresses the coil spring 17, closes the upper valve opening 24, and at the same time closes the lower valve opening. 18.

27 is a cover case.

Next, the operation of the present invention having the above configuration will be explained.

Now, when the electromagnetic coil 25 is energized, the valve element 15 is attracted and moved in the direction of arrow A, and the lower valve opening 18
is opened and the upper valve port portion 24 is closed. This valve element 15 moves while being guided in point contact with a pin forming the valve element guide member 19, and its movement is smooth and stable. This is done in a state where the

Therefore, in the present invention, the valve element 15 is made of a single disk-shaped magnetic material, and is placed in point contact within a valve element guide member provided inside the valve wall surface having the liquid inlet in the valve chamber. The valve element 15 is loosely fitted into the upper and lower valve openings 2 via the coil spring 17.
4 and 18, it is possible to prevent obstruction of flow path switching due to intrusion of foreign matter, and since a pin body is used as the valve element guide member, frictional resistance when the valve element moves up and down can be reduced. In addition, it is possible to eliminate the locking phenomenon caused by dust, sand, etc. contained in the liquid, and the valve element can operate smoothly. In addition, since the valve element 15 is operated independently only by the pressing force of the coil spring 17, there is no need for any other heavy magnetic attraction member for guide sliding such as a plunger, so the entire solenoid valve can be made small. Unlike the prior art, the valve element does not become bulky and bulky, the power consumption of the electromagnetic coil is considerably small, and the contact friction resistance of the valve element can be kept to a minimum.

In particular, it is possible to save energy without using a large amount of electric power to discharge the washer fluid from the windows of a car.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a longitudinal sectional view of the entire solenoid valve, and Figure 2 being a cross-sectional plan view of the main parts showing the relationship between the valve housing and the valve element. It is. FIG. 3 is an explanatory diagram of the prior art. DESCRIPTION OF SYMBOLS 11... Valve housing, 15... Valve element, 16... Valve chamber, 19... Valve element guide member, 18, 24... Valve port part, 20... Valve wall surface, 23... Gap part.

Claims (1)

[Scope of utility model registration request] The valve chamber 16 of the valve housing 11 formed under the electromagnetic coil 25 is connected to a horizontal liquid inlet 12 and a first liquid outlet 13 that passes inside the electromagnetic coil 25.
The upper valve port 24 and the second liquid outlet 1 communicate with each other.
A valve element guide consisting of a plurality of pins communicates with the lower valve port portion 8 which communicates with the valve chamber 16 and between the valve wall surface 20 of the valve chamber 16 and the upper and lower valve port portions 24 and 18, respectively. The members 19 are arranged concentrically and in parallel in the axial direction, and a disc-shaped valve element 15 made of a magnetic material is loosely fitted in a point contact state, and the first liquid outlet is provided above the valve element 15. A solenoid valve in which a coil spring 17 provided in a liquid path communicating with 13 is pressed into contact with the coil spring 17.