KR200183301Y1 - Solenoid valve - Google Patents

Abstract

The solenoid valve according to the present invention has a valve body 41 having an inlet and an outlet, a diaphragm 53 disposed between the inlet and the outlet of the valve body, a diaphragm holder 55 supporting the diaphragm, and the diaphragm. And first through holes 59 and 61 formed on the eccentric side of the diaphragm holder, a hole 63 formed in an intermediate portion of the diaphragm holder so as to communicate with an outlet of the valve body, and an upper side of the valve body. A solenoid bracket 71 coupled to the electromagnet 75 wound around the outside of the solenoid bracket, a plunger 77 disposed inside the electromagnet and moved up and down by the magnetic force of the electromagnet, First elastic means 79 for applying an elastic force to the plunger to move the plunger in a predetermined direction; and magnetic force applied to the plunger when power is not supplied to the coil body. Electron having a permanent magnet 81 disposed on one side of the electromagnet to maintain the plunger in a constant position by, and between the diaphragm holder and the solenoid bracket, the pressure chamber in which the fluid stays when the valve is closed In the valve, the pressure chamber is fixedly coupled to the inside of the pressure chamber by a second flow hole which is opened and closed by the lower end of the plunger and a medium member 56 having a through hole formed in the magnetic field, and the pressure chamber is first pressured by the medium member. A chamber 57 and a second pressure chamber 58; The diaphragm holder combined with the diaphragm is guided by the intermediate member to move up and down. Thus, since the diaphragm holder is configured as described above, the size of the electromagnet is reduced by reducing the size of the electromagnet and minimizing power consumption. The service life of the valve can be significantly increased, and even if there is a disturbance of the fluid by other valve means of the connecting pipe, the malfunction of the solenoid valve does not occur, thereby increasing the reliability of the opening and closing operation.

Description

Solenoid valve

The present invention relates to a solenoid valve using an electromagnet and a permanent magnet.

The solenoid valve using the electromagnet is the most widely used among the automatic valves. Recently, the valve can be remotely opened and closed by a sensing device, thereby reducing the waste of fluid by supplying an appropriate amount of fluid only when necessary. In addition, it is easy to use, and it is widely used in automatic urine washing machine, automatic toilet washing machine, automatic faucet, automatic sour washing machine.

Since the solenoid valve must continuously supply the DC power to the electromagnet in order to maintain the open state of the flow path to continuously supply the fluid where necessary, power consumption is high, and the battery power is used due to the excessive power consumption. Since it is not practical in terms of replacement and battery capacity, a power supply facility for converting to DC using a commercial power supply must be used. Therefore, the existing manual valve should be replaced with a solenoid valve that can be remotely operated or a new solenoid valve will be supplied. In order to do the facility, a lot of construction cost burden was involved.

As an improved solenoid valve, there is a patent application No. 94-7682 filed with the Korean Patent Office on April 13, 1994 by the present applicant.

As shown in FIG. 1, the solenoid valve disclosed in Application No. 94-7682 includes a valve body 10 and a solenoid 20.

The valve main body 10 has an inlet 11 and an outlet 12 are formed, and the diaphragm 13 and the diaphragm holder 14 supporting the diaphragm 13 are formed at an intermediate portion between the inlet 11 and the outlet 12. The pressure chamber 15 is disposed above the diaphragm holder 14, and the first through hole 16 and the second through hole 17 are disposed on the eccentric side and the center of the diaphragm holder 14. These are formed, respectively.

The solenoid 20 has a plunger 21 which moves up and down by an electromagnetic force, elastic means 22 disposed on the lower outer peripheral surface of the plunger 21 to hold the plunger 21 downward, and the plunger ( 21 and the mounting member 23 for receiving the elastic means 22 and the edge of the diaphragm 13 in close contact with the valve body 10, and a coil wound around the bobbin, the upper outer peripheral surface of the mounting member 23 While equipped with an electromagnet 24 disposed in the

Permanent magnet 26 disposed below the electromagnet 24 to maintain the plunger 21 in a fixed position by the magnetic force applied to the plunger 21 when the power is not supplied to the electromagnet 24 And a bracket 27 disposed on the outside of the permanent magnet 26 and the electromagnet 24 to form a magnetic path by the permanent magnet 26 and to serve as a cover of the solenoid 20, and the bracket 27. And a guide member 28 disposed above the plunger 21 to guide the magnetic field of the permanent magnet 26 to form a magnetic path.

Both ends of the electromagnet 24 are provided with first and second terminals 29 and 30 to which direct current is applied, respectively, and the permanent magnet 26 has a first magnetic member having the same magnetic poles disposed to face each other ( 31) and a second magnetic member 32.

In the conventional solenoid valve configured as described above, when DC power is supplied to the electromagnet so that the first terminal 29 of the electromagnet 24 becomes the + pole and the second terminal 30 of the electromagnet 24 becomes the-pole, A strong magnetic field is formed by this. That is, the strong magnetic field which raises the plunger 21 is formed in an inside of an electromagnet by the law of the right screw of amperes. The magnetic force of the magnetic field of the electromagnet 24 is greater than the magnetic weight of the plunger 21 and the elastic force of the elastic means 22.

Therefore, the plunger 21 is moved upward along the mounting member 23, and the pressure in the pressure chamber 15 is momentarily increased as the fluid in the pressure chamber 15 flows out through the second distribution hole 17. It becomes smaller than the pressure of the inlet 11, the diaphragm 13 raises, a valve opens, and fluid flows out. This is because the size of the second distribution hole 17 is larger than the first distribution hole 16, even if the fluid at the inlet side flows into the pressure chamber 15 through the first distribution hole 16, the second distribution hole 17 This is because the pressure in the pressure chamber 15 becomes smaller than the pressure at the inlet side as a result of the large amount of fluid flowing out through).

Next, when the electric power supplied to the electromagnet 24 is cut off, only the magnetic field by the permanent magnet 26 is formed. That is, the magnetic path of the magnetic field in the direction passing through the plunger 21, the guide member 28, the bracket 27 in order to the upper side of the permanent magnet 26 is formed, the magnetic field formed below the permanent magnet 26 Since the plunger 21 is not affected, the plunger 21 remains moved on top of the solenoid 20. Therefore, the flow path in the valve body 10 continues to open and the fluid continues to flow out. At this time, the magnetic force of the magnetic field through the magnetic path formed on the upper side of the permanent magnet 26 is greater than the combined force of the weight of the plunger 21 and the elastic force of the elastic means (22).

Next, when the flow of fluid is to be stopped, the first terminal 29 of the electromagnet 24 becomes the negative pole and the second terminal 30 of the electromagnet 24 becomes the positive pole by control means (not shown). When the DC power is supplied to the electromagnet as much as possible, a strong magnetic field is formed inside the electromagnet 24 by the law of the right screw of the ampere, and the plunger 21 is moved downward, and the plunger ( 21 ends the second flow hole 17 so that the flow path in the valve body 10 is closed and the outflow of the fluid is stopped. This is because the force which raises the diaphragm 13 by the pressure by the fluid on the inlet side is smaller than the force which lowers the diaphragm 13 by the pressure of the pressure chamber, and this is the diaphragm in the pressure chamber 15 even if the pressure is the same. This is because the working area acting on (13) is larger than the working area acting on the diaphragm 13 on the inlet side.

Next, when the electric power supplied to the electromagnet 24 is cut off, only the magnetic field by the permanent magnet 26 is formed. That is, a magnetic path of a magnetic field in a direction passing through the plunger 21, the guide member 28, and the bracket 27 is formed above the permanent magnet 26, and below the permanent magnet 26 of the plunger 21. A magnetic field is formed along the path through the bottom leading to the opposite polarization of the permanent magnet. At this time, the magnetic force of the magnetic field through the magnetic field formed on the upper side of the permanent magnet 26 is smaller than the sum of the weight of the plunger 21 and the elastic force of the elastic means 22 and the magnetic force of the magnetic field through the magnetic field formed on the lower side of the permanent magnet. It is. Therefore, the plunger 21 is maintained in the state moved to the lower portion of the solenoid 20, the flow path in the valve body 10 is continuously closed to maintain the state that the fluid does not flow out.

Therefore, even if the power is supplied to the electromagnet 24 at the beginning of the outflow of the fluid and only the end of stopping the outflow of the fluid, the fluid can be continuously discharged through the solenoid valve, and the flow of the fluid can be stopped continuously. The consumption is minimized, so even if a small battery is used as a power source for the solenoid valve, the solenoid valve can be supplied for a long time.

By the way, according to the conventional solenoid valve comprised in this way, even if the space | interval between the inlet surface of the 2nd flow hole 17 and the lower surface of the plunger is minimized in order to flow out the fluid of the pressure chamber 15 so that a solenoid valve may open. Although the conditions necessary for opening can be satisfied, the second distribution provided in the diaphragm holder 14 at the time of opening is necessary because the distance between the bottom face of the diaphragm 13 and the valve seat surface needs to be increased in order to increase the water flow rate. The plunger must be further raised so that the inlet face of the ball 17 does not contact the bottom face of the plunger 21, which causes the gap between the bottom face position of the plunger and the bottom face position of the plunger to open when closed. The force of the solenoid 20 that raises the plunger 21 should be increased, which causes the size of the electromagnet 24 to be increased, thereby requiring a large amount of coils and increasing power consumption, thereby shortening the battery life. There.

In addition, when the solenoid valve is connected to a connection pipe having a plurality of valve means, when the solenoid valve is opened and closed other valve means, the diaphragm 13 is temporarily interrupted by the disturbance of the fluid in the pipe. There was a problem that the momentary ascension and the plunger 21 rose momentarily to maintain the position by the magnetic force of the permanent magnet 26 and the open state continued.

Therefore, to solve the above problems of the present invention, the object of the present invention is to reduce the size of the electromagnet to reduce the requirement of the coil, minimize the power consumption, can significantly increase the life of the battery, and other valves of the connection pipe It is to provide a solenoid valve which improves the reliability of the opening and closing operation by preventing malfunction of the solenoid valve even if fluid is disturbed by the means.

1 is a longitudinal sectional view showing a conventional solenoid valve,

2 is a longitudinal sectional view showing a solenoid valve according to the present invention;

3 to 6 is an operation state diagram of the solenoid valve according to the present invention.

<Explanation of symbols for main parts of the drawings>

41: valve body 43: solenoid

45: inlet 47: outlet

53: diaphragm 55: diaphragm holder

57; Pressure chamber 71: solenoid bracket

75: electromagnet 77: plunger

79: first elastic means 81: permanent magnet

59, 61: distribution channel 1 85: distribution channel 2

87: through hole 89: intermediate member

91: second elastic means 95: valve member

The solenoid valve according to the present invention includes a valve body having an inlet and an outlet, a diaphragm disposed between the inlet and the outlet of the valve body, a diaphragm holder supporting the diaphragm, and an eccentric side of the diaphragm and the diaphragm holder. A first flow hole formed in communication with the hole formed in the middle portion of the diaphragm holder so as to communicate with the outlet of the valve body, a solenoid bracket coupled to the upper side of the valve body, and a coil body wound around the outside of the solenoid bracket. The electromagnet, the plunger disposed inside the electromagnet and moved up and down by the magnetic force of the electromagnet, first elastic means for applying an elastic force to the plunger to move the plunger in a predetermined direction, and a power source to the coil body. The plunger may be fixed by a magnetic force applied to the plunger when it is not supplied. A solenoid valve having a permanent magnet disposed on one side of the electromagnet so as to be held in a position, and having a pressure chamber in which a fluid stays when the valve is closed between the diaphragm holder and the solenoid bracket. A second flow hole which is opened and closed by the lower end of the plunger and an intermediate member having a through hole formed in the magnetic field thereof are fixedly coupled, and the pressure chamber is separated into the first pressure chamber and the second pressure chamber by the intermediate member; The diaphragm holder to which the diaphragm is coupled is guided by the intermediate member to move up and down.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 2, the solenoid valve according to an embodiment of the present invention has a structure in which the solenoid 43 is coupled to the upper side of the valve body 41.

The valve body 41 is formed with an inlet 45 and an outlet 47, and a chamber 51 having a first sheet 49 formed between the inlet 45 and the outlet 47. In addition, a diaphragm 53 made of a flexible material such as rubber is disposed on the upper side of the first sheet 49 to open and close the flow path to the outlet 47, and the diaphragm 53 includes the diaphragm 53. A diaphragm holder 55 in close contact with the diaphragm 53 is disposed to support the upper side of the diaphragm holder 55. The diaphragm holder 55 is guided to the upper side of the diaphragm holder 55, and the edge of the diaphragm 53 is compressed to hermetically seal. Intermediate member 56 for holding the is fixedly coupled.

A first pressure chamber 57 is formed between the diaphragm holder 55 and the intermediate member 56, and a second pressure chamber 58 is formed between the intermediate member 56 and the plunger described later. .

On the eccentric side of the diaphragm 53 and the diaphragm holder 55, first flow holes 59 and 61 are formed to communicate the chamber 51 and the pressure chamber 57, respectively, and the valve body 41 A hole 63 is formed in the middle portion of the diaphragm holder 55 so as to communicate with the outlet 47 of.

Cylindrical protrusions 65 are formed on the upper side of the diaphragm holder 55 so as to be guided by the intermediate member 56, and a lower groove on the lower side of the diaphragm holder 55 allows the fluid to be easily removed. 67 is provided, and the packing member 69 is fitted to the outer surface of the projection 65.

The solenoid 43 is a solenoid bracket 71 is coupled to the upper side of the valve body 41 by a fixing member 73, the electromagnet 75 is wound around the outer surface of the solenoid bracket 71 coil Is provided, the plunger 77 which is moved up and down by the magnetic force of the electromagnet is coupled to the inside of the electromagnet 75, the elastic force is applied to the plunger 77 to move the plunger 77 in a predetermined direction The first elastic means 79 to be applied is coupled to the upper side of the plunger 77, and when the power is not supplied to the electromagnet 75, the plunger 77 by the magnetic force applied to the plunger 77 A permanent magnet 81 is disposed above the plunger 77 so as to be maintained at a constant position.

A receiving portion 83 is formed at the middle of the bottom surface of the intermediate member 56 so as to receive the protrusion 65. The center of the receiving portion communicates with the second pressure chamber 58 and the plunger 77. The second distribution hole (83) is opened and closed by the lower end of the, and the first pressure chamber (57) and the second pressure chamber (58) in a spaced distance from the second distribution hole (83). The through-hole 87 which communicates is formed.

The second elastic means 91 is coupled between the intermediate member 56 and the diaphragm holder 55 to bring the diaphragm 53 into close contact with the first sheet.

On the upper side surface of the second flow hole 85, a second sheet 92 on which the valve member 95 described later is seated is formed.

A restraining member 93 is inserted below the permanent magnet 81 to restrain the first elastic means 79, and a lower end portion of the plunger 77 opens and closes the second flow hole 85. 95) are combined. At this time, a stepped protrusion 97 is formed at the lower end of the plunger 77, and the valve member 95 is fitted to the protrusion 97.

Through holes are formed in the solenoid bracket 71 in the longitudinal direction, and inside the through holes, the plunger 77, the first elastic means 79, the restraining member 93 and the permanent magnet from below. 81 are sequentially inserted. At this time, the packing member 99 is fitted to the outer peripheral surfaces of the restraining member 93 and the permanent magnet 81 so as to prevent the leakage of fluid. A packing member 101 is sandwiched between the solenoid 43 and the intermediate member 56 to prevent leakage of fluid.

The first terminal 107 and the second terminal as shown in FIG. 3 to be electrically connected to a power supply means (not shown) at the lower side and the upper side of the coil of the electromagnet 75 to supply power to the electromagnet 75. 109 are formed, respectively.

The first elastic means 79 and the second elastic means 91 uses a spring having an appropriate modulus of elasticity according to the magnetic force.

In the solenoid valve according to the present invention configured as described above, as shown in Fig. 3, the first terminal 107 of the electromagnet 75 becomes the positive pole and the second terminal 109 of the electromagnet 75 becomes the negative pole. When a direct current power supply is supplied to an electromagnet, a magnetic field is formed by the electromagnet. That is, the magnetic field which raises the plunger 77 is formed in an inside of an electromagnet by the law of the right screw of amperes. Accordingly, the plunger 77 is moved upward, the second flow hole 85 is opened, the pressure in the second pressure chamber 58 is reduced, and the diaphragm 53 is lifted up. As it falls, the fluid through the inlet 45 flows out through the first sheet 49 to the outlet 47.

Next, as shown in FIG. 4, when the power supply to the electromagnet 75 is cut off, only the magnetic field by the permanent magnet 81 is formed. That is, a magnetic field path is formed from the upper side of the permanent magnet 81 to pass through the outer circumferential surface portion of the solenoid bracket 71, the plunger 77 and the restraining member 93 and enter the lower side of the permanent magnet 81. At this time, the downward elastic force of the first elastic means 79 is smaller than the force by the magnetic field of the permanent magnet 81. Therefore, the plunger 77 keeps being moved upward, the flow path in the valve body 41 continues to open and the fluid continues to flow out.

Next, in order to stop the outflow of the fluid, as shown in Fig. 5, the first terminal 107 of the electromagnet 75 becomes a -pole by a control means (not shown), and the second of the electromagnet 75 becomes negative. When DC power is supplied to the electromagnet so that the terminal 109 becomes the positive pole, a magnetic field is formed by the electromagnet. That is, the magnetic field which lowers the plunger 77 is formed in the inside of an electromagnet by the law of the right screw of amperes. Therefore, the plunger 77 moves downward, the valve member 95 blocks the second flow hole 85 so that the pressure of the first pressure chamber 57 is greater than the pressure of the inlet port 45, so that the diaphragm 53 ) Close to the first sheet 49, the flow path in the valve body 41 is closed, and the outflow of the fluid is stopped.

Next, when the power source supplied to the electromagnet 75 is cut off, as shown in Fig. 6, only the magnetic field by the permanent magnet 81 is formed. That is, the magnetic field exits from the upper side of the permanent magnet 81 and passes through the upper yoke 82, the outer circumferential surface portion of the solenoid bracket 71, the plunger 77 and the restraining member 93 and enters the lower side of the permanent magnet 81. Although a chair path is formed, it is weaker than the downward elastic force of the first elastic means 79, so that the plunger 77 keeps being moved downward. Therefore, the diaphragm keeps in close contact with the first sheet 49 so that the flow path in the valve body 41 is closed so that the outflow of the fluid is stopped.

On the other hand, since the upper edge of the intermediate member 56 is always in close contact with the bottom of the solenoid bracket 71, the fluid flows when the flow path is opened and due to the disturbance of the fluid remaining when the fluid is closed. Even if the diaphragm 53 flows temporarily, the position of the plunger is maintained as it is, and no malfunction occurs. Therefore, the opening and closing operation of the solenoid valve is assured.

According to the solenoid valve according to the present invention, by minimizing the gap between the plunger and the permanent magnet, the size of the electromagnet can be reduced, reducing the consumption of the coil, minimizing the power consumption can significantly extend the life of the battery, connection piping Even if there is a disturbance of the fluid by the other valve means of the malfunction does not occur and the reliability is high.

Claims (1)

A valve body having an inlet port and an outlet port, a diaphragm disposed between the inlet port and the outlet port of the valve body, a diaphragm holder supporting the diaphragm, and a first flow hole formed to communicate with each other on an eccentric side of the diaphragm and the diaphragm holder; A hole formed in an intermediate portion of the diaphragm holder to communicate with an outlet of the valve body, a solenoid bracket coupled to an upper side of the valve body, an electromagnet made of a coil body wound outside the solenoid bracket, and an inside of the electromagnet A plunger disposed on the plunger and moved up and down by the magnetic force of the electromagnet, first elastic means for applying an elastic force to the plunger to move the plunger in a predetermined direction, and when the power is not supplied to the coil body, The magnetic force to hold the plunger in a fixed position In having a permanent magnet arranged at one side of the magnet, and the diaphragm holder and the solenoid valve pressure chamber is formed, the fluid staying at the time the valve is closed between the solenoid bracket, Inside the pressure chamber is fixedly coupled to the second through hole which is opened and closed by the lower end of the plunger and the intermediate member having a through hole formed in the magnetic field, the pressure chamber is separated into the first pressure chamber and the second pressure chamber by the intermediate member There is, The diaphragm holder coupled to the diaphragm is guided by the intermediate member to move up and down.