JPS61262283A - Pilot system electromagnetic water feeding valve - Google Patents

Abstract

PURPOSE:To obtain a strong attracting force by a fixed core by inserting a fixed core into an armature guide and joining the rear edge of the core to the rear part of a yoke surrounding a coil and arranging an armature in front of the fixed core. CONSTITUTION:A fixed core 3 is inserted into an armature guide 2, and the rear edge part of the core 3 is joined with the rear part 6a of a yoke 6 surrounding a solenoid coil 5 through a hole 4 formed onto the rear edge surface 2a of the guide 2. Further, an armature 7 is arranged in front of the fixed core 3. With such constitution, a strong attractive force by the fixed core can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pilot-type electromagnetic water supply valve that can supply and stop water, particularly in a water faucet, without twisting the faucet cock or the like.

(Prior art) Generally, electric washing machines, etc. have pilot type electromagnetic water supply valves (
A water supply valve (hereinafter abbreviated as water supply valve) is installed to control water supply and water shutoff.

Conventionally, the structure of this type of water supply valve consists of a solenoid section including an armature that is displaced back and forth by a solenoid coil and a biasing means such as a spring, and a diaphragm valve body section that opens and closes a water channel by the displacement of the armature. Since this armature is placed underwater, the armature and the solenoid coil are partitioned off by a synthetic resin armature guide to prevent water leakage, and a back pressure chamber is formed by the guide and the valve body.

When the solenoid coil is not energized, the water supply valve uses the biasing means to press the armature forward, thereby closing the waterway, and when the solenoid coil is energized, the armature is sucked backward by the attraction force. , which operates to open the waterway. Note that since electric washing machines and the like use 100V AC from a power line, which is a commercial power source, the solenoid section also operates at 100V AC.

(Problem to be solved by the invention) However, conventional water supply valves have the following problems.

In other words, such a water supply valve places the armature in the internal space of the solenoid coil, and thereby attracts the armature only with the flux generated by the solenoid coil.

Therefore, in the case of a solenoid section that operates at 100 V AC, it is possible to obtain a practically sufficient suction force.
Even if the solenoid part becomes larger, it will not be a big problem in electric washing machines and the like.

However, if it is to be used as a water faucet in a general household, miniaturization is a major technical challenge, and depending on the installation location, there are many cases where there is no electric light wire, so securing a power supply becomes an issue. . For this reason, when using a water faucet, it is desirable to use a battery or a type with a built-in battery, but the conventional water supply valves described above cannot obtain sufficient suction force to drive the valve body; Even if a device is designed to generate power, the power loss is large, and it also increases in size, causing problems in practical use such as batteries.

Therefore, the present invention eliminates the above-mentioned problems, obtains sufficient suction power even with batteries, etc., and achieves a compact size and power saving, thereby providing a practically sufficient water supply suitable for use with water faucets. There is a valve to provide.

(Means for Solving the Problems) The present invention includes a solenoid section including an armature that is displaced back and forth by a solenoid coil and a biasing means;
The valve body part has a thickness that opens and closes the waterway by the displacement of the armature, and is applicable to a water supply valve in which the coil and the armature are separated by an armature guide, and a back pressure chamber is formed by the guide and the valve body part. As shown in FIG. 1, the feature is that a fixed core 3 is fitted into the armature guide 2, and the rear end of this core 3 is inserted into a hole 4 provided in the rear end surface 2a of the guide 2. The solenoid coil 5 is connected to the rear part 6a of the yoke 6 surrounding the solenoid coil 5, and the armature 7 is disposed in front of the fixed core 3. In particular, the water channel W is formed within the water faucet body 10, with one end serving as a water supply port 8 and the other end serving as a water discharge port 9.

(effect) Next, the operation of the present invention will be explained.

First, when the solenoid coil 5 is not energized, the energizing means 1
The armature 7 is displaced forward by the pressing action of 1, and the valve body 12 closes the water channel W and enters a water-stop state. on the other hand,
The magnetic field generated by the excitation of the solenoid coil 5 passes through a magnetic path consisting of a path of yoke 6 - fixed core 3 - armature 7 - yoke 6 →. A coaxial suction force acts through the gap G. Due to this suction action, Armatia 7
is displaced rearward against the biasing means 11, and the valve body portion 12
opens the waterway W and enters the water supply state.

Moreover, due to the coupling structure of the yoke 6 and the fixed core 3, high watertightness on the armature 7 side and the solenoid coil 5 side is completely maintained.

(Example) Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

First, the configuration of the water supply valve will be explained with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal sectional side view of a faucet body including a water supply valve according to the present invention, and FIG. 2 is an external side view of the same snake robot body.

A water supply valve designated by reference numeral 1 is attached to the back of a water faucet body 10, and this water supply valve 1 opens and closes a water channel W formed within the faucet body 10.

First, in order to clarify the present invention, the configuration of the water faucet body 10 will be described. This faucet body 10 includes a body body 13 integrally molded with resin.
It has a water supply port 8 at the top. The water supply port 8 communicates with a water supply chamber T which the valve body part 12 faces, and furthermore, the tip of a cylindrical valve seat part 14 is provided inside the water supply chamber T so as to face the valve body part 12.

An intermediate waterway 15 extending substantially horizontally is formed inside the valve seat portion 14 . The downstream side of the intermediate waterway 15 communicates with the water outlet 9 via a switching means 16 that switches between shower water and straight water. In addition, 9a is the shower water outlet, 9b
17 is a straight water outlet, and 17 is a switching lever for switching the switching means 16. For example, the switching means 16 constitutes a known switching means 16 that moves to the right for shower water, and moves to the left for straight water.

On the other hand, a threaded portion 18 is formed on the upper outer periphery of the body main body 13, and a flange 20 is attached to the threaded portion 18 by a nut 19. Furthermore, fixing screws 21 are screwed inward from a plurality of positions in the circumferential direction of the flange 20, thereby tightening and fixing an existing water faucet nozzle or the like inserted into the flange 2o.

At this time, the tip of the existing faucet nozzle is press-fitted into the rubber packing 23, the nut 19 is rotated and tightened, and the packing 23 is pressed against the upper end of the main body 13 to seal the waterway. In addition, 24 is a filter for removing dust attached to the water supply port 8, and 25 is an outer cover.

In addition, by using such a faucet body 1o, it is possible to control the water supply and water stop at an existing faucet, but the flow rate must be adjusted to the desired flow rate in advance by turning the cock of the existing faucet. Just leave it there. Further, a means for adjusting the flow rate may be separately provided within the main body 13 if necessary.

On the other hand, the water supply valve 1 includes the above-mentioned valve body part 12 and this valve body part 1.
It consists of a solenoid section 30 that drives the motor.

The valve body part 2 consists of a rubber diaphragm 31 that partitions the water supply chamber T, and a synthetic resin diaphragm plate 32 stacked on the rear surface of the diaphragm 31. diaphragm 31
The peripheral edge portion 31a of the armature guide 2 is clamped to the main body 13 by the back pressure chamber forming portion 38 of the armature guide 2.

The diaphragm plate 32 has a valve seat shaft portion 33 provided at the center thereof and a communication shaft portion 34 provided within the other surface thereof, which penetrate and lock into the diaphragm 31 and are integrated, and the valve seat shaft portion 33 has a discharge hole 3.
5, and a communication hole 36 is formed in the communication shaft portion 34.

On the other hand, the armature guide 2 includes a cylindrical guide portion 37 and the back pressure chamber forming portion 38 provided in a radial direction from the front edge of the guide portion 37. This allows Armachia Guide 2
In particular, a back pressure chamber S surrounded by the back pressure chamber forming portion 38 and the valve body portion 12 is formed. The armature guide 2° is held by a front yoke portion 39 in the form of a ring of iron plates, and this front yoke portion 39 is fixed to the main body 12 with screws or the like.

Further, a bobbin 40 having a solenoid coil 5 wound thereon is fitted into the outer circumferential portion of the guide portion 370:J, and is further surrounded by a cylindrical rear yoke portion 41 having a rear end surface portion.

The front end of the rear yoke part 41 is integrally and continuously formed with the front yoke part 39. Note that a rear auxiliary pole 43 formed by integrating a cylindrical portion and a ring portion is provided from the rear end surface of the bobbin 40 to the rear inner circumferential surface of the bobbin 40, and from the front end surface of the front yoke portion 39 to the front inner circumferential surface of the bobbin 40. A front auxiliary pole 44, which is formed by integrating a cylindrical part and a ring part, is interposed in the part leading to , and serves to reinforce a part of the magnetic circuit and the end of the armature guide 2.

On the other hand, a rod-shaped fixed core 3 made of stainless steel (magnetic material) and having an outer diameter substantially the same as the inner diameter of the guide 2 is fitted inside the armature guide 2 . The rear end portion of the fixed core 3 is integrally formed as a small-diameter cylindrical shaft portion 3a, and a recessed groove 45 along the circumferential direction is formed on the outer peripheral surface, and an O-ring 46 is fitted into the recessed groove 45 for sealing. Thereby, the watertightness between the fixed core 3 and the armature guide 2 becomes sufficient. on the other hand,
The rear end surface 2a of the guide 2 has a hole 4 having approximately the same diameter as the cylinder shaft 3a, and the rear yoke 41 also has a hole 47 formed therein. Therefore, the cylindrical shaft portion 3a is made to protrude from the inside of the armature guide 2 to the outside through each hole 4.47, and is pushed out to the rear surface of the rear yoke portion 41 and caulked. 3 is integrated.

Further, an armature 7 is inserted in front of the fixed core 3 in the armature guide 2. The armachia 7 is formed into a stainless steel (magnetic material) rod shape with a diameter slightly smaller than the inner diameter of the armature guide 2, and is slidable within the armature guide 2. A resin sheet 48 is embedded in the front end of the armature 7 by caulking, and by exposing the front surface of the sheet 48, it functions as a valve for opening and closing the discharge hole 35 of the diaphragm plate 32.

On the other hand, the rear end surface of the armature 7 and the front end surface of the fixed core 3 become contact surfaces 7a and 3a, respectively, during suction, but the fixed core 3
The contact surface 3a of the armature 7 has a concave shape, and the contact surface 7a of the armature 7 has a convex tapered surface, which fit into each other during suction. This makes it possible to substantially expand the adsorption area. Further, a recess 49.50 is formed in the center of each contact surface 3a7a, and a coil spring 51 serving as a biasing means is compressed between each recess 49.50.

The solenoid section 30 having the above configuration is covered by a cover 52.

Next, the operation of the water supply valve 1 will be explained.

First, when the solenoid coil 5 is not energized, the armature 7 and the valve body 12 are displaced forward by the biasing force of the spring 51, and the diaphragm 31 is in pressure contact with the cylindrical valve seat 14. Further, the water supplied to the water supply port 8 fills the water supply chamber T and also fills the back pressure chamber S through the insertion hole 36, so that the pressures in the back pressure chamber S and the water supply chamber T become equal. As a result, back pressure is applied to the diaphragm plate 32, bringing the diaphragm 31 into pressure contact with the cylindrical valve seat 14, resulting in a water-stop state.

On the other hand, if the solenoid coil 5 is energized by energizing it from a 4V battery (or battery), for example, the front yoke part 39 - the front auxiliary pole 44 - the armature 7 - the fixed core 3 - the rear yoke part 41
A magnetic circuit is formed by a path from (rear auxiliary pole 43) to front yoke portion 39, and in particular, fixed core 3 and rear yoke portion 41 are completely magnetically connected in advance. Furthermore, solenoid coil 5
Inside the fixed core 3 and the armature 7, each contact surface 3a,
7a serves as a magnetic pole and faces each other through a gap G. Therefore, during excitation, a strong attractive force acts between the two contact surfaces 3a and 7a, and the armature 7 is attracted to the fixed core 3. The position of the armature 7 opens the discharge hole 35 of the diaphragm plate 32, and the water in the back pressure chamber T is discharged from the discharge hole 35 to the intermediate waterway 15. As a result, the water pressure in the back pressure chamber T becomes lower than the water pressure in the water supply chamber T, and the water pressure in the water supply chamber T displaces the valve body portion 12 rearward, causing water to flow out from the water supply chamber T to the intermediate waterway 15. In other words, water is being supplied.

In the present invention, the fixed core 3 and the rear yoke portion 41 pass through the armature guide 2 and are integrated.

Therefore, although in the past, no holes or the like could be formed in the armature guide 2 due to the need for watertightness, this configuration can maintain high watertightness.

Next, peripheral techniques for actually using such a water supply valve 1 will be described with reference to FIGS. 3 and 4. FIG. 3 is a front view of the faucet body and controller, and FIG. 4 is a block diagram showing a control system for controlling the water supply valve.

A water supply switch 70 and a water stop switch 71 are arranged on the front surface 10a of the faucet body 10. Both are touch switches that can be turned on with a slight pressing force.

Further, the faucet body 10 is connected to the controller 80 via a cord 80a. The controller 80 has a built-in battery (or battery) P as shown in FIG. 4, and can also use a commercial AC power source by using an AC/DC adapter 81 if necessary. Further, the controller 80 has a built-in microcomputer, and necessary control programs are stored in the memory. On the other hand, the panel includes a keyboard 82, an LCD display 83 including a clock function, and an LE08 for displaying status, etc.
3. Equipped with a. The switches 70 and 71, a proximity sensor 84 that detects a human body using an infrared sensor;
A water supply needle amount sensor 85 using a water wheel, various external sensors 86 such as a temperature sensor, and a foot switch 87 that can be operated by foot.
, the water supply valve 1 receives various information from a remote control means using a transmitter 88 and a receiver 89 as input data.
can be controlled and used as follows.

For example, the water supply switch 70 can be brought into a water supply state by touching it, and the water can be turned off by touching the water stop switch 71. It can also automatically sense when a person approaches and supply water, and automatically sense when a person leaves and turn off the water. Furthermore, various other uses such as starting water supply at a desired time and stopping the water supply when a certain amount of water is reached are possible.

Although embodiments have been described above, the present invention is not limited to these embodiments. For example, the water supply valve is most suitable for being attached to a water faucet body, but of course it can also be used as a water supply valve for any purpose such as a washing machine. The detailed shape, structure, material, etc. can be arbitrarily changed without departing from the spirit of the present invention.

Further, the present invention can be applied not only to a water supply valve but also to a liquid supply valve for any other fluid.

(Effects of the Invention) As described above, the water supply valve according to the present invention includes a solenoid portion including an armature that is displaced back and forth by a solenoid coil and a biasing means, and a valve body portion that opens and closes a water channel by the displacement of the armature. In the pilot type electromagnetic water supply valve, the coil and the armature are partitioned by an armature guide, and a back pressure chamber is formed by the guide and the valve body, in which a fixed core is fitted into the armature guide and the The rear end of the core is connected to the rear part of the yoke surrounding the coil through a hole provided in the rear end surface of the guide, and the armature is disposed in front of the fixed core, so that the fixed core does not move in the axial direction. Gain cooperative attraction. Therefore, the water supply valve can be sufficiently driven by a battery or a battery. In addition, it is possible to save power and be made compact, making it especially suitable for use in water faucets, and water supply and water stop control can be easily performed using a microcomputer, etc. Versatility and convenience can be greatly improved.

Further, even if a hole is provided in the armature guide, watertightness between the armature and the solenoid coil is sufficient, and high reliability can be maintained.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional side view of a faucet body equipped with a water supply valve according to the present invention, Fig. 2 is a side view of the snake robot body, Fig. 3 is a front view of the snake robot body and controller, and Fig. 4 is a water supply valve. The block diagram which shows the control system which controls. In the drawings, 1... Water supply valve, 2... Armature guide, 2a... Rear end surface portion, 3... Fixed core, 4... Hole, 5... Solenoid coil, 6... ...York, 6a
...Rear part of yoke, 7...Armatia, 10...
・Faucet body.

Claims (1)

[Scope of Claims] 1. The solenoid part includes an armature that is displaced back and forth by a solenoid coil and a biasing means, and a valve body part that opens and closes a waterway by the displacement of the armature, and the coil and the armature are connected to the armature. In a pilot type electromagnetic water supply valve partitioned by a guide and in which a back pressure chamber is formed by the guide and the valve body, a fixed core is fitted into the armature guide and the rear end of the core is connected to the rear end surface of the guide. A pilot type electromagnetic water supply valve, characterized in that the armature is connected to a rear part of a yoke surrounding the coil through a hole provided in the part, and the armature is disposed in front of a fixed core. 2. The pilot type electromagnetic water supply valve according to claim 1, wherein the contact surfaces of the fixed core and the armature are formed into concave and convex tapered surfaces that fit together during suction. 3. A recess is formed in at least one of the contact surfaces of the fixed core or the armature, and the biasing means is interposed in the recess. Pilot type electromagnetic water supply valve. 4. The fixed core has a cylindrical shaft portion integrally formed at the rear end thereof, and the cylindrical shaft portion is inserted into a hole formed in the yoke and fixed by caulking in an eyelet shape. Pilot type electromagnetic water supply valve as described in . 5. The pilot type electromagnetic water supply according to claim 1, wherein a groove is formed along the circumferential direction on the outer peripheral surface of the fixed core, and a sealing O-ring is fitted into the groove. valve.