JPH04125376A - Solenoid controlled switching valve - Google Patents

Abstract

PURPOSE:To obtain a solenoid controlled switching valve for use in hot water with a simple structure, inexpensiveness and reduced power consumption by switching a direction of carrying current to a solenoid for opening and closing the flow-out ports corresponding to respective first and second valve bodies thereby switching the flow-out ports. CONSTITUTION:A first valve body 13 is connected to a second valve body 15 by a drive shaft 16. An electromagnet 21 is composed of a solenoid 19 and an iron core 20 extending within a drive shaft 16. A permanent magnet 22 attracted or repulsed by the electromagnet 21 is fixed between the first and second valve bodies 13 and 15 within the drive shaft 16, and is energized so as to be apart from the electromagnet 21. As a current is applied to the solenoid 19, the drive shaft 16 is pulled out along the iron core 20, thus closing a first port 12 and opening a second port 14. By switching the direction of carrying a current to the solenoid 19, the second valve body 15 is closed and the first valve body 15 is opened, which allows how water to be discharged from the first flow-out port 9. Therefore, it is possible to eliminate application of current during discharging hot water by instantaneously applying a current only in switching, and hence to reduce power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electromagnetic switching valve for supplying hot water to showers, washers, etc.

2. Description of the Related Art Conventionally, there has been an electrically driven switching valve of this type as shown in FIG. one inflow boat 1 and a first outflow boat 2
, a second outflow boat 3 is provided, and a ball valve 6 is rotated via a connecting shaft 5 by rotating a motor 4 in forward and reverse directions, and the position I of the opening of the ball valve 6 is adjusted between two first and second outflow boats. Second
The flow path is changed according to the outflow boat 2.3.
Two first valve seats as valve seats for the ball valve 6. The second outflow boat 2.3 is tightened to sandwich the fluororesin valve seat 7 from both sides, thereby maintaining airtightness.

Problems to be Solved by the Invention However, in the above configuration, the valve seat 7 made of fluororesin is easily swollen by hot water, increasing the rotational resistance of the ball valve 6, and there is a risk that the motor 4 will not be able to drive it. ,
In addition, there were cases where the sealing performance deteriorated due to wear and hardening.

SUMMARY OF THE INVENTION The present invention has been made to solve these conventional problems, and an object of the present invention is to provide an electromagnetic switching valve that has a simple configuration, is mainly used for hot water, has low power consumption, and is inexpensive.

Means for Solving the Problems In order to solve the above problems, the electromagnetic switching valve of the present invention includes a valve housing having one inlet and two outlet ports, and a first valve housing that switches the discharge destination to the two outlet ports. a valve body and a second valve body;
A drive shaft connecting the two valve bodies, a solenoid, an iron core, and a solenoid fixed between the first valve body and the second valve body in the drive shaft, and the iron core being fixed depending on the direction of energization to the solenoid. It consists of a permanent magnet that attracts or repels.

Effect With the above-described configuration, by changing the direction of energization to the solenoid, the permanent magnet attracts or repels, and the first valve body and the second valve body, which are interlocked with the permanent magnet, respectively open or open the corresponding outlet. It closes and switches the outgoing light.

Example Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a sectional view of an electromagnetic switching valve according to an embodiment of the present invention.

In FIG. 1, there is a valve housing 11 having one inlet 8, a first outlet 9, and a second outlet 10, and a first opening 12 facing the first outlet 9 is opened and closed. First valve body 1
3 and a second valve element 15 that opens and closes the 20th opening 14 facing the second outlet 10 are connected by a drive shaft 16, and when one valve element (13 or 15) is open, the other valve element (13 or 15) is opened. The valve body (15 or 13) is configured to close. The first valve body 13 and the second valve body 15 each have a rubber sheet 17,18 to increase the closing force with less force. There is a N51 stone 21 consisting of a solenoid 19 and an iron core 20 extending into the drive shaft 16, and a permanent magnet 22 that attracts or repels depending on the polarity of the electromagnet 21 is attached to the drive shaft 1.
It is fixed between the first valve body 13 and the second valve body 15 in 6, and is biased by a spring 23 in a direction away from the 'H, M1 stone 21.

Next, the operation will be explained. When current is applied to solenoid 19,
When the end face of the iron core 20 and the end face of the permanent magnet 22 have different polarities, the permanent magnet 22 overcomes the biasing force of the spring 23 and is attracted to the iron core 20. That is, the drive shaft 16 fixing the permanent magnet 22 is raised along the iron core 20, the first valve body 13 comes into contact with the corresponding seat, and the first opening 12
is closed, the second valve body 15 is removed from the corresponding seat,
The second opening 14 is opened and hot water flows from the second outlet 10. Even if the solenoid 19 is de-energized in this state, the valve position will not change due to the holding force of the permanent magnet 22.If you change the direction of the current flowing to the solenoid 19, the polarity of the end faces of the permanent magnet 22 and the iron core 20 will be the same, resist. That is, the second valve body 15 interlocking with the permanent magnet 22 closes the second opening 14 and hot water is discharged from the first outlet 9.

Even if the solenoid 19 is de-energized in this state, the valve position will be maintained by the biasing force of the spring 23.

With the above configuration, the discharge destination is switched according to the current direction of the solenoid 19, and only by applying current instantaneously at the time of switching, the energization can be canceled while hot water is being discharged, resulting in low power consumption. Also, when switching, it is possible to stop the flow of hot water before switching, and then switch.
．． The resistance of the fluid applied to the second valve body 13°15 is also small,
The power of the electromagnet 21 may also be small, and the instantaneous current value can also be reduced. Further, since the permanent magnet 22 is provided between the first valve body 13 and the second valve body 15 in the drive shaft 16 and indirectly faces the inlet 8, iron powder in the hot water is removed. When rust, etc. from pipes or pipes flows in, it is attracted to the vicinity of the permanent magnet 22 of the drive shaft 16, and iron powder, rust, etc. are caught between the two valve bodies 13.15 and their corresponding seats. This prevents leakage, iron powder, rust, etc. from entering the drive 16 and being directly attracted to the permanent magnet 22 and being caught between it and the iron core 20, causing malfunction. Since the iron core 20 extends inside the drive shaft 16 and slides on the iron core 20, the two valve bodies 13 and 15 do not wobble in the radial direction, ensuring reliable operation. And it is highly reliable.

Effects of the Invention As described above, the electromagnetic switching valve of the present invention provides the following effects.

(1) By changing the way the current is applied to the solenoid, the discharge destination can be switched. By simply applying current instantaneously only at the time of switching, the current can be de-energized while the fluid is being discharged, reducing power consumption.

(2) A permanent magnet is provided between the first valve body and the second valve body within the drive shaft, and because it is configured to indirectly face the inlet, iron powder in hot water and piping may be generated. When dirt flows in, by attracting it near the permanent magnet of the drive shaft, it is possible to prevent malfunctions caused by iron powder or rust, ensuring reliable operation and reliability. is high.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electromagnetic switching valve according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional switching valve. 8... Inlet, 9.10... Outlet,
11... Valve housing, 13... First valve body, 15... Second valve body, 16... Drive shaft, 19... ... Solenoid, 20 ... Iron core, 22 ... Permanent magnet. Name of agent: Patent attorney Akira Okaji and two others θ・-S
L entrance 2.10-1 1 mouth 11-...-41-IL salary 13 ° 19 I Gin: Town toy book 15...-More 2
JIf stop/f--End'-%'7 axis tq・-Solenoid Y 2θ・・-(miss-Hi2z・°

Claims (1)

[Claims] A valve housing having one inlet and two outlet ports, a first valve body and a second valve body that switch the discharge destination to the two outlet ports, and a drive shaft that connects the two valve bodies. An electromagnetic switching valve comprising a solenoid, an iron core, and a permanent magnet fixed between a first valve body and a second valve body in the drive shaft, and which attracts or repels the iron core depending on the direction of energization of the solenoid. .