JPH0547653U - solenoid valve - Google Patents

Abstract

(57) [Abstract] [Purpose] The suction noise of the fixed iron core 7 and the movable iron core 8 of the solenoid valve is reduced, and the pulsation of the discharge fluid can be imparted by the solenoid valve itself. [Structure] A fixed iron core 7 provided on the inner circumference of a coil 5, a movable iron core 8 arranged to face the fixed iron core 7, a spring 9 for elastically biasing the movable iron core 8, and elasticity of the movable iron core 8. In a solenoid valve provided with a valve element 10 which is provided at an end portion in the urging direction and which comes into contact with and separates from a valve seat 4, a cushioning material 11 is provided on one of the opposed end portions 7a, 8a of the fixed iron core 7 and the movable iron core 8. To provide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a solenoid valve provided in, for example, a discharge water flow path of a device for cleaning a local part of a human body.

[0002]

[Prior Art]

 Conventionally, control of discharged water and addition of a massage effect in a human body local cleaning apparatus are performed by different mechanisms. That is, for example, the discharge water is controlled by a solenoid valve having an ON-OFF mechanism, but since this solenoid valve merely opens and closes the discharge water flow path, the addition of the massage effect by the discharge water is The current situation is to use a device that has a mechanism that mixes air with water, or a device that has a mechanism that changes the discharge pressure itself of the discharge water by a motor or the like to give pulsation. In addition, the solenoid valve has a problem that an irritating metallic noise is generated due to the adsorption of the fixed core and the movable core inside the solenoid valve.

[0003]

[Problems to be solved by the device]

 In view of the above circumstances, the present invention has been made to solve the problems that the suction noise of the fixed iron core and the movable iron core of the solenoid valve is reduced, and the pulsation of the discharge fluid can be imparted by the solenoid valve itself. is there.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a fixed iron core provided on the inner circumference of a coil, a movable iron core arranged so as to reciprocate so as to face the fixed iron core, and the movable iron core opposite to the fixed iron core. In a solenoid valve having a spring that elastically biases toward the side and a valve body that is provided at an end portion of the movable core in the elastic biasing direction and that moves toward and away from a valve seat, the fixed core and the movable core face each other. A cushioning material is provided on one of the end portions. Further, in this configuration, a configuration is provided in which a drive device that selectively applies an intermittent pulse current and a full-wave rectified current or a direct current is added to the coil.

[0005]

[Action]

 In the solenoid valve configured as described above, the movable iron core is attracted toward the fixed iron core by applying a current to the coil to excite it, and the valve element at the end of the movable iron core separates from the valve seat to open the flow path. .. At this time, since the movable iron core and the fixed iron core do not come into direct contact with each other due to the interposition of the cushioning material, the suction noise is absorbed and alleviated.

In the ON state, since a magnetic space is formed between the movable iron core and the fixed iron core by the cushioning material, when the power supply to the coil is turned off, the valve is instantly closed, that is, The operation is performed with good responsiveness. Therefore, if an intermittent pulsed current is applied to the coil from the solenoid valve drive device, the valve element, together with the movable iron core, repeats opening and closing operations in synchronization with the pulse, causing pulsation in the fluid passing through the solenoid valve. give. Further, by applying a full-wave rectified current or a direct current to the coil, it is possible to maintain the valve open state and achieve a continuous discharge state without pulsation.

[0007]

【Example】

 1 and 2 show, as an embodiment of the present invention, an electromagnetic valve provided in a discharge water flow path of a human body local cleaning apparatus. That is, in the figure, 1 is a main body of the solenoid valve, and inside the body 1, there are a flow path 2, a valve chamber 3 formed in the middle of the flow path 2, and a middle of the flow path 2. A valve seat 4 facing the valve chamber 3 is formed. On the valve chamber 3 side of the body 1, a coil 5 is fixed together with a frame 6 on the outer periphery thereof, and also on the inner periphery of the coil 5 extending on the same axis as the valve chamber 3 and opposite to the valve chamber 3. A fixed iron core 7 is arranged at a position on the opposite side and is fixed to the frame 6.

Reference numeral 8 denotes a movable iron core that is arranged so as to reciprocate over the inner circumference of the coil 5 and the valve chamber 3 and that faces the fixed iron core 7. The movable iron core 8 is interposed between the movable iron core 7 and the fixed iron core 7. As a result, it is constantly elastically urged toward the side opposite to the fixed iron core 7, that is, toward the valve chamber 3 side. A valve body 10 is integrally provided at an end portion of the movable iron core 8 in the biasing direction, that is, an end portion 8a on the valve chamber 3 side, and the valve body 10 is reciprocally moved by the movable iron core 8. The valve seat 4 of. At the end 7a of the fixed iron core 7 facing the movable iron core 8, a buffer material 11 made of a non-magnetic elastic body such as an elastomer is fixed in a semi-embedded state.

In the solenoid valve having the above-described structure, the movable iron core 8 is attracted to the fixed iron core 7 side as shown in FIG. The body 10 separates from the valve seat 4 and opens the flow path 2. At this time, since the fixed iron core 7 is provided with the cushioning material 11, the fixed iron core 7 and the movable iron core 8 do not come into direct contact with each other at their opposing end portions 7a and 8b, and the cushioning effect of this cushioning material 11 The absorption noise of the movable iron core 8 is absorbed and alleviated. Further, in this state, since the magnetic gap is formed between the opposed ends 7a and 8b of the fixed iron core 7 and the movable iron core 8 due to the interposition of the buffer material 11, when the current to the coil 5 is cut off, By the repulsive force of the compressed spring 9, the movable iron core 8 and the valve body 10 instantly shift to the closed state shown in FIG.

FIG. 3 shows a driving device 12 for driving the electromagnetic valve having the above-described structure, which includes an AC power source V, a rectifier D, and a switch SW. Rectifier D are those diodes D ₁ ~ D ₄ are connected like a bridge, the input terminals T _1, T ₂ of the rectifier D is connected to the AC power source V. Switch SW, the contact a, and b of the current switching is provided with a contact point c for of the power supply OFF, the output terminal T ₃ of the output terminal T ₅ and a rectifier D between the input terminal T ₁ and the AC power source V is The contact terminals a and the output terminals T ₃ , T ₄ of the rectifier D are selectively connected to the coil 5 of the solenoid valve via the contact points b.

That is, according to the drive device 12, by switching the switch SW to the contact a, the coil 5 of the solenoid valve is half-wave rectified by the diode D ₂ of the rectifier D by the AC power source V. An electric current i ₁ having an intermittent waveform as shown in FIG. 4A is applied. At this time, in the portion A where the current i ₁ has risen, the movable iron core 8 is displaced toward the fixed iron core 7 side by the excitation of the coil 5, and the solenoid valve moves to the valve open state shown in FIG. In the portion B where the current i ₁ = 0, the solenoid valve shifts to the closed state shown in FIG. Since this operation is performed with extremely high responsiveness, the opening / closing operation is repeated in synchronization with the frequency of the AC power source V 1 to give a noticeable pulsation to the discharged water passing through the flow path 2. Therefore, the massage effect of the discharged water can be obtained without using a special device other than the solenoid valve.

Further, by switching the switch SW to the contact b, the current from the AC power source V is full-wave rectified by the diodes D _{1 to} D ₄ of the rectifier D in the coil 5 of the solenoid valve, as shown in FIG. A current i ₂ having such a continuous waveform is applied. For this reason, the solenoid valve can maintain the valve open state shown in FIG. 2 and make the discharge water passing through the flow path 2 into a continuous discharge state without pulsation. In order to cut off the discharge water flow path 2, the switch SW may be switched to the contact c to turn off the current to the coil 5.

In order to give pulsation to the discharged water, an intermittent pulse current other than the current i ₁ of the half-wave rectified waveform shown in FIG. 4 (a) may be applied to the coil 5, and The direct current i ₃ shown in FIG. 4C may be applied to the coil 5 to achieve the continuous discharge state. Further, in the illustrated embodiment, the cushioning material 11 is provided so as to be semi-embedded in the end portion 7a of the fixed iron core 7, but this cushioning material 11 is provided at the end portion 8a of the movable iron core 8 facing the fixed iron core 7. However, the shapes of other details are not particularly limited to those shown in the drawings.

[0014]

[Effect of the device]

 According to the solenoid valve of the present invention, when the coil is excited to open the valve, the attraction of the movable iron core to the fixed iron core is buffered by the interposition of the cushioning material, and the movable iron core and the fixed iron core are mediated by the interposition of the cushioning material. Due to the magnetic gap between them, the valve closing operation is performed with good responsiveness when the coil is de-energized. For this reason, the generation of annoying adsorption noise between the fixed core and the movable core during the valve opening operation is suppressed, and by applying intermittent pulse current to the coil as desired, the solenoid valve opens and closes. Since the discharged fluid is repeatedly pulsated, a massage effect can be obtained without disabling other devices, and it is extremely useful as a solenoid valve for a human body local cleaning device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a solenoid valve in a closed state according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same valve open state.

FIG. 3 is a circuit diagram showing an embodiment of a drive device for the solenoid valve.

FIG. 4 is an explanatory diagram showing a waveform of a current applied to a coil 5.

[Explanation of symbols]

1 Body 2 Flow Path 3 Valve Chamber 4 Valve Seat 5 Coil 6 Frame 7 Fixed Iron Core 7a Opposing End 8 Movable Iron Core 9 Spring 10 Valve Body 11 Buffer Material 12 Drive Device D Rectifier D _{1 to} D ₄ Diode SW Switch V AC Power Supply

Claims (2)

[Scope of utility model registration request] 1. A fixed iron core 7 provided on the inner circumference of the coil 5,
A movable iron core 8 arranged to face the fixed iron core 7 so as to be reciprocally movable, a spring 9 for elastically biasing the movable iron core 8 toward the opposite side of the fixed iron core 7, and elasticity of the movable iron core 8. A valve body 10 provided at an end portion 8a in the urging direction and brought into contact with or separated from the valve seat 4
A solenoid valve comprising: a cushioning material 11 provided on one of the opposed ends 7a and 8b of the fixed iron core 7 and the movable iron core 8. 2. The coil according to claim 2, wherein:
Driving device 12 for selectively applying intermittent pulse current i ₁ and full-wave rectified current i ₂ or DC current i _3.
An electromagnetic valve comprising: