CN219975567U

CN219975567U - Electromagnetic valve

Info

Publication number: CN219975567U
Application number: CN202321561552.0U
Authority: CN
Inventors: 董云岳
Original assignee: Ningbo Maibai Technology Co ltd
Current assignee: Ningbo Maibai Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-11-07
Anticipated expiration: 2033-06-19

Abstract

The present utility model provides a solenoid valve comprising: the valve sleeve is provided with a first end and a second end which are oppositely arranged; a stator disposed within the valve housing and adjacent the first end; the rotor is arranged in the valve sleeve and is close to the second end, and the rotor is connected and matched with the stator; the first elastic piece is arranged between the stator and the rotor and is used for resetting the rotor; the nozzle is arranged at the second end and is connected and matched with the rotor; and the second elastic component is arranged between the nozzle and the rotor and is used for assisting the rotor to move towards the stator. When the electromagnetic valve is in the second state, the force increasing component does not operate, and when the electromagnetic valve is to be switched from the second state to the first state, the stator attracts the rotor and compresses the first elastic piece, and meanwhile, the force increasing component generates thrust to push the rotor, so that the rotor can be quickly closed to the stator, and the problem in the prior art is solved.

Description

Electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve.

Background

Solenoid valves are electromagnetic controlled industrial devices, which are the basic elements of automation for controlling fluids, belonging to actuators. The basic structure of the electromagnetic valve mainly comprises: stator, mover, and elastic member. The two-position three-way electromagnetic valve device is mainly used for closing or connecting a medium, the two-position three-way electromagnetic valve can be used for providing fluid as power, and the valve is used for providing control fluid trend and providing a flow channel for the control fluid. The valve core assembly of the electromagnetic valve has two different working positions when being opened and closed, the three-way valve has three passage ports, and a passage communicated between any two passage ports in the electromagnetic valve is called a working passage.

The working principle of the electromagnetic valve is that the solenoid is electrified to enable the stator to generate a magnetic field to drive the rotor to move, the rotor compresses the spring, and then the electromagnetic valve is opened; when the solenoid is powered off, the magnetic field generated by the stator disappears, and the mover returns under the resilience force of the spring.

However, when receiving an instruction, the conventional electromagnetic valve has a slow response speed, and the electromagnetic valve cannot be quickly switched from the second state of "off" to the first state of "on", so that the response speed is slow, and the normal use of the electromagnetic valve structure is affected.

Disclosure of Invention

The utility model solves the problem that the normal use of the electromagnetic valve structure is affected due to the slower response speed of the existing electromagnetic valve.

In order to solve the above problems, the present utility model provides a solenoid valve comprising: the valve sleeve is provided with a first end and a second end which are oppositely arranged; a stator disposed within the valve housing proximate the first end; the rotor is arranged in the valve sleeve and is close to the second end, and the rotor is connected and matched with the stator; the first elastic piece is arranged between the stator and the rotor and is used for resetting the rotor; the nozzle is arranged at the second end and is connected and matched with the rotor; and the boosting assembly is arranged between the nozzle and the rotor and is used for assisting the pushing of the rotor.

Compared with the prior art, the technical effect that adopts this scheme can reach: when the electromagnetic valve is in the second state, the force increasing component does not operate, and when the electromagnetic valve is to be switched from the second state to the first state, the stator attracts the rotor and compresses the first elastic piece, and meanwhile, the force increasing component generates thrust to push the rotor, so that the rotor can be quickly closed to the stator, and the problem in the prior art is solved.

In this embodiment, the force increasing assembly includes: a second elastic assembly, the second elastic assembly comprising: the fixed bracket is fixedly arranged on the nozzle; the second elastic piece is arranged on the fixed support, one end of the second elastic piece is propped against one end of the mover, which is close to the second end, and the other end of the second elastic piece is fixed on the fixed support.

The technical effect after this technical scheme of adoption is, the second elastic component specifically includes the fixed bolster, and the fixed bolster can provide installation space for the second elastic component, and fixed bolster fixed mounting is in the upper portion of nozzle, and the second elastic component on the fixed bolster can provide power for the active cell for the removal of active cell towards the stator.

In this embodiment, the number of the second elastic members is plural, and the plural second elastic members are uniformly arranged along the circumferential direction of the fixing support, and the second elastic members include one or more of leaf springs and compression springs.

The technical effect after this technical scheme of adoption does, and the setting of a plurality of second elastic components can guarantee the stable removal of active cell, and a plurality of second elastic components evenly arrange along the fixed bolster and can guarantee that the active cell atress is even, guarantees that the active cell moves fast, and the second elastic component can be leaf spring, pressure spring, and the leaf spring can be connected with the fixed bolster, and easy processing, and the cost is lower.

In this embodiment, the elastic coefficient K1 of the second elastic member is smaller than the elastic coefficient K2 of the first elastic member.

The technical effect after adopting this technical scheme is, when the solenoid was not circular telegram, the solenoid valve was in the second state, and the elasticity coefficient of second elastic component is less than the elasticity coefficient of first elastic component in order not to influence sealed the setting between rotor and the nozzle, and when the solenoid valve was in the moment of switching between second state and the first state, the motion of rotor can be helped to the second elastic component, reached the effect of solenoid valve quick response.

In this embodiment, the electromagnetic valve further includes: the first air hole is arranged in the stator; the second air hole and the third air hole are arranged in the nozzle; a gap provided between the mover and the valve housing; when the electromagnetic valve is in a first state, the second air hole is communicated with the third air hole; when the electromagnetic valve is in the second state, the first air hole is communicated with the third air hole.

The technical effect after the technical scheme is that when the electromagnetic valve is in the second state, air flows out through the third air hole, the second through hole, the gap and the first air hole, so that air passage circulation in the electromagnetic valve is realized; when the electromagnetic valve is in the first state, air flow enters the second air hole through the third air hole so as to realize air passage circulation in the electromagnetic valve.

In this embodiment, a second through hole through which the air flows is provided on the fixing support, and the position of the second through hole is opposite to the third air hole and the gap.

The technical effect after adopting this technical scheme is, when the solenoid valve is in the second state, the air current flows through third gas pocket, second through-hole, clearance and first gas pocket to realize the gas circuit circulation in the solenoid valve.

In this embodiment, a protrusion is disposed at an end of the mover away from the second end, a recess is disposed at an end of the stator away from the first end, and the recess of the stator is in connection fit with the protrusion of the mover.

The technical effect after adopting this technical scheme is, through setting up the arch on the rotor, the corresponding increase of electromagnetic force of rotor can respond in time to the operation, sets up the recess on the stator and can connect the cooperation with the arch, and can increase the external diameter of stator and increase electromagnetic force to under the prerequisite that rotor and stator all increase electromagnetic force, the electromagnetic force of whole solenoid valve increases, can respond in time.

In this embodiment, the mover includes: a mover body; and the first sealing piece is arranged on the rotor body and is close to the position of the second end, and the first sealing piece is close to the position of the second air hole on the nozzle.

The technical effect after the technical scheme is adopted is that the abrasion between the rotor and the nozzle is reduced by the arrangement of the first sealing element, the service life of the rotor is prolonged, and the sealing effect of the rotor when the rotor contacts with the stator is improved; when the electromagnetic valve is in the second state, due to the arrangement of the first sealing piece, air flow can flow out from the third air hole to the first air hole, and the trend of the air flow is realized.

In this embodiment, the mover body includes: a base part, which is arranged close to the second end and is provided with a through groove; an electromagnetic portion extending in a direction approaching the first end;

the outer periphery of the electromagnetic part is sleeved with the first elastic piece, one end of the first elastic piece is abutted against one end of the base part, and the other end of the first elastic piece is abutted against one end of the stator.

The technical effect after this technical scheme of adoption is, for realizing the installation of first elastic component, sets up into base portion and electromagnetic portion with the active cell body, and is echelonment between base portion and the electromagnetic portion to be in order to provide the installation space of elastic component, so that the one end of elastic component supports with base portion and leans on, and the other end supports with the one end of stator, and in order to realize the air current circulation, sets up logical groove on base portion, and the air current can flow through the clearance through logical groove.

In this embodiment, the electromagnetic valve further includes a second sealing member disposed between the mover and the stator; wherein, when the solenoid valve is in the first state, the stator cooperates with the mover through a second seal that closes off the air flow to the first air hole.

The technical effect after this technical scheme of adoption is, in order to guarantee that the solenoid valve is in the first state, closes the passageway of air current flow direction first gas pocket, establishes the second sealing member in the cover on the arch of active cell, and when the active cell moved, through the sealed cooperation of second sealing member between stator and the active cell to make the air current unable through the first gas pocket in the stator, thereby guarantee that the air current can only flow in second gas pocket and third gas pocket.

Drawings

FIG. 1 is a schematic diagram of a solenoid valve according to the present utility model;

FIG. 2 is a schematic cross-sectional view taken in the direction A-A of FIG. 1 and showing the solenoid valve in a second state;

FIG. 3 is a schematic cross-sectional view taken in the direction A-A of FIG. 1 and showing the solenoid valve in a first state;

FIG. 4 is a schematic view of a stator according to the present utility model;

FIG. 5 is a schematic diagram of a structure of a mover according to the present utility model;

FIG. 6 is a schematic view of a nozzle according to the present utility model;

FIG. 7 is a schematic view of the valve housing of the solenoid valve of the present utility model;

fig. 8 is a schematic structural view of a nozzle according to the present utility model.

Reference numerals illustrate: 1. an electromagnetic valve; 2. a valve sleeve; 201. a first end; 202. a second end; 3. a stator; 301. a recess; 302. a first air hole; 4. a mover; 401. a protrusion; 402. a gap; 403. a mover body; 404. a base portion; 405. an electromagnetic section; 406. a through groove; 5. a first elastic member; 6. a nozzle; 601. a second air hole; 602. a third air hole; 7. a first seal; 8. a second seal; 9. a fixed bracket; 10. a second elastic member; 11. a solenoid; 12. and a second through hole.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

The present utility model provides a solenoid valve 1, as shown in fig. 1-8, comprising: a valve housing 2 having oppositely disposed first and second ends 201, 202; a stator 3 disposed within the valve housing 2 and adjacent to the first end 201; a rotor 4 disposed in the valve housing 2 and near the second end 202, wherein the rotor 4 is in connection with the stator 3; a first elastic member 5 disposed between the stator 3 and the mover 4, the first elastic member 5 being used for resetting the mover 4; a nozzle 6, disposed at the second end 202, where the nozzle 6 is connected to and matched with the mover 4; a force increasing assembly is arranged between the nozzle 6 and the rotor 4, and the force increasing assembly is used for assisting the pushing of the rotor 4.

The electromagnetic valve 1 comprises a device body, the valve sleeve 2 is arranged in the device body, a bracket is arranged in the device body and used for installing the valve sleeve 2, the nozzle 6 is arranged on the bracket, a solenoid 11 is further arranged in the device body, the solenoid 11 is arranged on two sides of the valve sleeve 2, and when the solenoid 11 is electrified, the electromagnetic valve 1 is in a first state so that the stator 3 drives the rotor 4 to move.

The arrangement of the first elastic piece 5 enables the rotor 4 and the stator 3 to form elastic fit, so that the fit degree between the stator 3 and the rotor 4 is improved, and the motion conversion efficiency of the stator 3 and the rotor 4 is improved; under the condition of power on, the stator 3 moves to enable the first elastic piece 5 to deform to drive the rotor 4 to move, and the elastic force generated when the first elastic piece 5 deforms resets the stator 3 and the rotor 4, so that the periodic and cyclic movement of the electromagnetic valve 1 is realized.

However, when the electromagnetic valve 1 is required to be changed from the second state to the first state, the booster component can push the rotor so as to realize the rapid pushing of the rotor and ensure the rapid response of the electromagnetic valve, so that the booster component is arranged between the nozzle 6 and the rotor 4, the booster component is provided with a generated force so as to enable the rotor 4 to rapidly move when moving towards the stator 3, and the booster component can be an elastic component, a cylinder or the like and can apply force to enable the rotor 4 to rapidly move when moving towards the stator.

Further, the force increasing assembly includes: a second elastic assembly, the second elastic assembly comprising: a fixed bracket 9 fixedly installed on the nozzle 6; the second elastic member 10 is disposed on the fixed support 9, one end of the second elastic member 10 abuts against one end of the mover 4, which is close to the second end 202, and the other end of the second elastic member 10 is fixed on the fixed support 9.

The reinforcement subassembly can adopt elastic component as the preference, and the elastic action of second elastic component can make solenoid valve 1 want when changing the first state from the second state, and the second elastic component can give the active cell thrust to realize the quick promotion of active cell, guarantee the quick response of solenoid valve, and elastic component's setting cost is lower, and comparatively convenient, easy processing. The fixing bracket 9 is to provide a mounting space and a platform for the second elastic member 10, and the fixing bracket 9 is ring-shaped as a whole and is mounted on the upper portion of the nozzle 6. The fixing bracket 9 and the second elastic members 10 may be integrally formed by punching, and then one ends of the second elastic members 10 are tilted to form elastic force.

Further, the elastic coefficient K1 of the second elastic member 10 is smaller than the elastic coefficient K2 of the first elastic member 5.

When the solenoid 11 is not electrified, the solenoid valve 1 is in the second state, and the elastic coefficient of the second elastic piece 10 is smaller than that of the first elastic piece 5 so as not to influence the sealing arrangement between the rotor 4 and the nozzle 6, so that the force bearing area of fluid, preferably gas, on the bottom of the rotor 4 is only a middle part; when the solenoid valve 1 is to be switched from the second state to the first state, the solenoid 11 is energized, the stator 3 and the mover 4 are magnetized, and the mover 4 moves toward the stator 3, and at this time, the mover 4 is subjected to an upward electromagnetic force, a restoring force of the first elastic member 5, and a fluid pressure of the fluid against the mover 4. The second elastic member 10 is arranged to apply force to the mover 4 toward the stator 3, so as to ensure that the mover 4 can rapidly move toward the stator 3, and finally ensure rapid response of the electromagnetic valve 1.

When the solenoid 11 is electrified, the solenoid valve 1 is in a first state, when the solenoid valve 1 is switched from the first state to a second state, the solenoid 11 is powered off, and because the fluid is distributed around the rotor 4 at the moment, the pressure of the fluid on the rotor 4 is counteracted up and down, the rotor 4 only receives the restoring force of the first elastic piece 5, and the rotor 4 returns to the initial position under the action of the first elastic piece 5.

Further, the number of the second elastic members 10 is plural, and the plural second elastic members 10 are uniformly arranged along the circumferential direction of the fixing bracket 9.

Preferably, the number of the second elastic pieces 10 is 4, the 4 second elastic pieces 10 are uniformly arranged along the circumferential direction of the fixed support 9, and the uniform arrangement of the 4 fixed supports 9 can ensure that the stress of the mover 4 is uniform and can help the mover 4 to push towards the stator 3.

Further, the second elastic member 10 includes one or more of a leaf spring and a compression spring.

The second elastic member 10 may be a spring with a common shape, and the bottom of the mover 4 may be fixedly connected with the top of the second elastic member 10, so that the mover 4 may be accelerated to move toward the stator 3 under the action of the second elastic member 10 when the mover 4 moves toward the stator 3. In addition, the second elastic member 10 may be a leaf spring, which has low manufacturing cost and is easy to process.

Further, the electromagnetic valve 1 further includes: a first air hole 302 provided in the stator 3; the second air hole 601 and the third air hole 602 are arranged in the nozzle 6; a gap 402 provided between the mover 4 and the valve housing 2; when the electromagnetic valve 1 is in the first state, the second air hole 601 is communicated with the third air hole 602; when the solenoid valve 1 is in the second state, the first air hole 302 communicates with the third air hole 602.

The stator 3 is internally provided with a first air hole 302, and the first air hole 302 penetrates through the axial direction of the stator 3 so that air flow can flow into the first air hole 302 and finally flow into a pipeline corresponding to the first air hole 302; the nozzle 6 is provided with a second air hole 601 and a third air hole 602, and the second air hole 601 and the third air hole 602 can be respectively connected with the air channel pipe. When the solenoid 11 is energized, the solenoid valve 1 is in the first state, and the second air hole 601 is communicated with the third air hole 602; when the solenoid 11 is de-energized, the solenoid valve 1 is in the second state, and the first air hole 302 communicates with the third air hole 602.

The gap 402 corresponds to the position of the third air hole 602, so that when the solenoid valve 1 is in the second state, the air flows through the third air hole 602, through the gap 402, through one side of the mover 4, and finally flows out through the first air hole 302 on the stator 3.

Further, the fixing bracket 9 is provided with a second through hole 12 for the air flow to pass through, and the position of the second through hole 12 is opposite to the third air hole 602 and the gap 402.

In order to ensure the circulation of the air flow, a second through hole 12 is arranged on the fixed bracket 9, and in order to ensure the smoothness of the air flow, the position of the second through hole 12 is opposite to the position of the third air hole 602 and the gap 402.

Further, a protrusion 401 is provided at an end of the mover 4 away from the second end 202, a recess 301 is provided at an end of the stator 3 away from the first end 201, and the recess 301 of the stator 3 is in connection fit with the protrusion 401 of the mover 4.

Through set up protruding 401 on the active cell 4, the electromagnetic force of active cell 4 correspondingly increases, can respond in time to the operation, set up recess 301 on the stator 3 and can connect the cooperation with protruding 401, increased the surface area of stator 3 and active cell 4, let the magnetic line of force pass more easily, reduced the magnetic resistance. In addition, the external diameter of the stator 3 can be increased to increase the electromagnetic force, so that the electromagnetic force of the whole electromagnetic valve 1 can be increased on the premise that the electromagnetic force is increased on the premise that both the rotor 4 and the stator 3 are increased, and the response can be timely achieved. The top of the mover 4 is provided with a protrusion 401, the protrusion 401 is a boss, the cross section of the protrusion is similar to an isosceles trapezoid with a short upper bottom and a long lower bottom, so that the protrusion 401 on the mover 4 can be matched with the accommodating space, and the electromagnetic force of the mover 4 can be increased, so that the electromagnetic valve 1 can respond quickly.

Further, the mover 4 includes: a mover body 403; a first sealing member 7 is arranged on the body of the mover 4 and is close to the second end 202, and the first sealing member 7 is close to the second air hole 601 on the nozzle 6.

In order to reduce the abrasion between the rotor 4 and the nozzle 6, the first sealing member 7 may specifically use rubber particles, but with the use time of the rubber particles being too long, the rubber particles age, so that rubber adhesion exists between the bottom of the rotor 4 and the nozzle 6, the rotor 4 is difficult to be attracted by the stator 3, and quick response cannot be achieved. In the utility model, a booster component is added between the bottom of the rotor 4 and the nozzle 6, so that thrust force in the direction of the stator 3 can be generated on the rotor 4, and the rotor 4 can rapidly move towards the stator 3. The force increasing component is preferably a second elastic component which generates thrust force to the rotor 4 in the direction of the stator 3 so that the rotor 4 can move towards the stator 3, and the quick response of the electromagnetic valve is not affected even if rubber ages.

Further, the mover body 403 includes: a base portion 404 disposed adjacent to the second end 202, wherein a through slot 406 is disposed on the base portion 404; an electromagnetic portion 405 extending in a direction approaching the first end 201; the first elastic member 5 is sleeved on the outer periphery of the electromagnetic portion 405, one end of the first elastic member 5 abuts against one end of the base portion 404, and the other end of the first elastic member 5 abuts against one end of the stator 3.

The mover body 403 includes a base portion 404 and an electromagnetic portion 405, wherein the base portion 404 is preferably a cylinder, and wherein a through groove 406 on the mover 4 is provided on the base portion 404 and penetrates along an axial direction of the base portion 404, and the through groove 406 is provided opposite to the third air hole 602 to ensure air intake. Wherein, both the base portion 404 and the electromagnetic portion 405 can generate electromagnetic force when the solenoid 11 is energized.

Further, the electromagnetic valve 1 further comprises a second sealing member 8 arranged between the rotor 4 and the stator 3; wherein, when the electromagnetic valve 1 is in the first state, the stator 3 is matched with the rotor 4 through a second sealing piece 8, and the second sealing piece 8 closes the air flow to the first air hole 302.

The sealing member 8 may be provided at the top of the mover 4, at the bottom of the stator 3, or between the mover 4 and the stator 3.

In order to ensure that when the electromagnetic valve 1 is in the first state, the passage of the air flow to the first air hole 302 is closed, it is preferable that the protrusion 401 of the mover 4 is sleeved with the second sealing member 8, and when the mover 4 moves, the stator 3 and the mover 4 are in sealing fit through the second sealing member 8, so that the air flow cannot pass through the first air hole 302 in the stator 3, and therefore, the air flow can only flow in the second air hole 601 and the third air hole 602.

The specific principle of the utility model is as follows: when the electromagnetic valve 1 is in the second state, the solenoid 11 is not electrified, at this time, the rotor 4 and the stator 3 are in the state shown in fig. 2, the air flow channel is shown as a path B in the figure, and the air flow passes through the third air hole 602, the through groove 406, the gap 402, the side of the protrusion 401 on the rotor 4, the recess 301 on the stator 3 and finally the first air hole 302 on the stator 3.

When the solenoid 11 is in the first state and the solenoid 11 is not energized, the solenoid 1 is in the second state, and the elastic coefficient of the second elastic member 10 is smaller than that of the first elastic member 5 so as not to affect the sealing arrangement between the mover 4 and the nozzle 6, so that the force-bearing area of the fluid, preferably the gas, to the bottom of the mover 4 is only a middle part; when the solenoid valve 1 is to be switched from the second state to the first state, the solenoid 11 is energized, the stator 3 and the mover 4 are magnetized, and the mover 4 moves toward the stator 3, and at this time, the mover 4 is subjected to an upward electromagnetic force, a restoring force of the first elastic member 5, and a fluid pressure of the fluid against the mover 4. The second elastic member 10 is arranged to apply force to the mover 4 toward the stator 3, so as to ensure that the mover 4 can rapidly move toward the stator 3, and finally ensure rapid response of the electromagnetic valve 1. At this time, the mover 4 and the stator 3 are in the state shown in fig. 3, the air flow channel is shown as a path C in the figure, the air flow passes through the third air hole 602, and the air flow flows out through the second air hole 601 due to the first air hole 302 being closed by the cooperation of the mover 4 and the stator 3.

When the electromagnetic valve 1 is in the second state, the mover 4 is under the restoring force of the first elastic member 5 so that the mover 4 can be quickly reset.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims

1. A solenoid valve (1), characterized by comprising:

a valve housing (2) provided with a first end (201) and a second end (202) arranged opposite to each other;

a stator (3) disposed within the valve housing (2) and proximate the first end (201);

a rotor (4) arranged in the valve sleeve (2) and close to the second end (202), wherein the rotor (4) is connected and matched with the stator (3);

a first elastic member (5) disposed between the stator (3) and the mover (4), the first elastic member (5) being used for resetting the mover (4);

the nozzle (6) is arranged at the second end (202), and the nozzle (6) is connected and matched with the rotor (4);

and the boosting assembly is arranged between the nozzle (6) and the rotor (4) and is used for assisting the pushing of the rotor (4).

2. A solenoid valve (1) according to claim 1, characterized in that said force increasing assembly comprises: a second elastic assembly, the second elastic assembly comprising:

a fixed bracket (9) fixedly mounted on the nozzle (6);

the second elastic piece (10) is arranged on the fixed support (9), one end of the second elastic piece (10) is propped against one end of the rotor (4) close to the second end (202), and the other end of the second elastic piece (10) is fixed on the fixed support (9).

3. A solenoid valve (1) according to claim 2, characterized in that the elastic coefficient (K1) of the second elastic member (10) is smaller than the elastic coefficient (K2) of the first elastic member (5).

4. A solenoid valve (1) according to claim 2, characterized in that said second elastic members (10) are plural in number, said plural second elastic members (10) being uniformly arranged along the circumferential direction of said fixed bracket (9), said second elastic members (10) comprising one or more of leaf springs and compression springs.

5. A solenoid valve (1) according to claim 2, characterized in that said solenoid valve (1) further comprises:

a first air hole (302) provided in the stator (3);

a second air hole (601) and a third air hole (602) are arranged in the nozzle (6);

a gap (402) provided between the mover (4) and the valve housing (2);

when the electromagnetic valve (1) is in a first state, the second air hole (601) is communicated with the third air hole (602); when the electromagnetic valve (1) is in the second state, the first air hole (302) is communicated with the third air hole (602).

6. A solenoid valve (1) according to claim 5, characterized in that said fixed support (9) is provided with a second through hole (12) for the passage of an air flow, said second through hole (12) being positioned opposite said third air hole (602), said gap (402).

7. A solenoid valve (1) according to claim 1, characterised in that the end of the mover (4) remote from the second end (202) is provided with a projection (401), the end of the stator (3) remote from the first end (201) is provided with a recess (301), and the recess (301) of the stator (3) is in connection engagement with the projection (401) of the mover (4).

8. A solenoid valve (1) according to claim 5, characterized in that said mover (4) comprises: a mover body (403);

and the first sealing piece (7) is arranged on the rotor body (403) and is close to the second end (202), and the first sealing piece (7) is close to the second air hole (601) on the nozzle (6).

9. A solenoid valve (1) according to claim 8, characterized in that said mover body (403) comprises:

a base portion (404) disposed adjacent to the second end (202), the base portion (404) having a through slot (406) disposed therein;

an electromagnetic portion (405) extending in a direction approaching the first end (201);

the first elastic piece (5) is sleeved on the periphery of the electromagnetic part (405), one end of the first elastic piece (5) abuts against one end of the base part (404), and the other end of the first elastic piece (5) abuts against one end of the stator (3).

10. A solenoid valve (1) according to claim 5, characterised in that said solenoid valve (1) further comprises a second seal (8) arranged between said mover (4) and said stator (3);

wherein, when the electromagnetic valve (1) is in a first state, the stator (3) is matched with the rotor (4) through a second sealing piece (8), and the second sealing piece (8) closes the air flow to the first air hole (302).