Electromagnetic valve

Abstract

The invention discloses an electromagnetic valve with a compact structure, which comprises a shell assembly, an electromagnetic driving assembly, a valve body assembly, a valve body assembly, a valve body assembly, a valve body assembly, a valve body assembly, a valve body assembly and a valve body assembly, and is characterized in that the shell assembly is provided with a containing cavity; the electromagnetic driving assembly comprises a movable iron core, a static iron core arranged on the lower side of the movable iron core and a coil unit arranged on the outer side of the movable iron core. The electromagnetic valve further comprises a valve seat, a valve element and a reset assembly, the valve seat is provided with a working opening, and a medium enters the flow channel through the working opening. The valve core is arranged opposite to the working port, the valve core is in transmission connection with the movable iron core, and the valve core is connected with a reset assembly; when the coil unit is powered on, the movable iron core moves downwards to be matched with the static iron core and drives the valve element to seal the working opening, and when the coil unit is powered off, the reset assembly drives the valve element to move upwards to open the working opening and drives the movable iron core to move upwards. The invention relates to the technical field of electromagnetic valves.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and more specifically to a solenoid valve. Background Art

[0002] The solenoid valve is one of the essential components of automobile products. Its main function is to realize the on-off function of the pipeline. The existing solenoid valve's moving iron core is generally provided with a seal. The moving iron core is driven to move by the coil and the reset part, so that the seal can open or close the passage. The existing solenoid valve is large in size and cannot meet the use requirements. Summary of the invention

[0003] In view of the deficiencies and defects of the prior art, a solenoid valve with a compact structure is provided.

[0004] A solenoid valve, comprising:

[0005] A housing assembly, wherein the housing assembly is provided with a receiving cavity, and an electromagnetic drive assembly is provided in the receiving cavity;

[0006] The electromagnetic drive assembly includes a moving iron core, a stationary iron core arranged at the lower side of the moving iron core, and a coil unit arranged at the outer side of the moving iron core;

[0007] The solenoid valve further comprises a valve seat, a valve core and a reset assembly, wherein the valve seat is provided with a working port, and the medium enters the flow channel through the working port;

[0008] The valve core is arranged opposite to the working port, the valve core is transmission-connected to the moving iron core, and the valve core is connected to a reset assembly;

[0009] When the coil unit is energized, the moving iron core moves downward to cooperate with the static iron core, and drives the valve core to close the working port.

[0010] When the coil unit is powered off, the reset assembly drives the valve core to move upward to open the working port and drives the moving iron core to move upward.

[0011] After adopting the above structure, the electromagnetic valve of the present invention has the following advantages compared with the prior art: when the coil unit is energized, the moving iron core moves downward to cooperate with the static iron core, and drives the valve core to close the working port. At this time, the working port and the flow channel are cut off from each other, and the medium cannot pass through;

[0012] When the coil unit is powered off, the reset assembly drives the valve core to move upward to open the working port and drives the moving iron core to move upward. At this time, the working port is connected to the flow channel and the medium can pass through.

[0013] The electromagnetic force of the coil unit drives the valve core to close or open the working port, which has the characteristics of fast response speed and can quickly open or close the flow of the medium.

[0014] It can accurately control the flow and pressure of the medium, and is suitable for occasions that require precise control;

[0015] In addition, it has the characteristics of simple structure and convenient maintenance and overhaul.

[0016] As an improvement of the present invention, the housing assembly includes a housing and an end cover, wherein the housing is a cylindrical structure, and the upper and lower ends of the housing are respectively opened.

[0017] The end cover is arranged at the upper end of the shell, and the end cover is provided with a connecting portion extending into the upper end opening of the shell, and a seal is formed between the connecting portion and the inner wall of the shell through a sealing ring.

[0018] The static iron core is connected to the lower opening of the shell, and a seal is formed between the static iron core and the inner wall of the shell through a sealing ring body;

[0019] A sealed accommodating cavity is formed between the static iron core and the end cover.

[0020] As an improvement of the present invention, a sleeve is provided at the upper end of the static iron core, and the moving iron core is arranged in the sleeve;

[0021] The coil unit includes a wire sleeve and a coil wound on the outside of the wire sleeve. The wire sleeve is sleeved on the outside of the sleeve through the inner hole, and a gasket is abutted between the upper end of the wire sleeve and the lower end of the connecting part. The lower end of the wire sleeve abuts against the upper end surface of the static iron core.

[0022] As an improvement of the present invention, the upper end of the gasket is provided with a spacer portion extending upward and closing inward, and the spacer portion is placed in the gap between the inner hole of the connecting portion and the sleeve;

[0023] The gasket and the spacer are provided with a hole body penetrating up and down, the inner side of the connecting part is provided with a baffle plate extending downward, the baffle plate penetrates into the hole body, and a wiring cavity is formed between the inner side of the baffle plate and the inner wall of the connecting hole, the coil terminal at the upper end of the wire sleeve passes through the hole body into the wiring cavity, and is electrically connected to the conductive member in the wiring cavity;

[0024] A first gap is formed between the inner side wall of the hole body at the upper end of the spacer, and between the circumference of the upper end of the sleeve and the inner wall of the baffle, a second gap is formed between the outer wall of the sleeve and the inner hole of the sleeve, a third gap is formed between the bottom of the sleeve and the upper end surface of the static iron core, and a fourth gap is formed between the outer side of the sleeve, the outer side of the coil and the inner wall of the shell;

[0025] The first gap, the second gap, the third gap, the fourth gap, and the wiring cavity form a flow channel structure that is interconnected;

[0026] The end cover is provided with a first air vent which penetrates through the end cover, and the first air vent is communicated with the first gap.

[0027] As an improvement of the present invention, a conductive member is embedded in the end cover, and one end of the conductive member penetrates into the wiring cavity and is electrically connected to the wiring terminal of the coil;

[0028] The end cover is provided with an extended plug-in portion, the plug-in portion is for plugging the wiring terminal, the plug-in portion is provided with a plug-in cavity inside, and the other end of the conductive member extends into the plug-in cavity;

[0029] The first vent hole is arranged on the bottom wall of the plug-in cavity.

[0030] As an improvement of the present invention, the valve seat is arranged at the lower end of the static iron core, the flow channel is formed between the valve seat and the static iron core, the working port is arranged below the flow channel, and the upper end of the working port is communicated with the flow channel;

[0031] The static iron core is provided with a connecting hole corresponding to the flow channel, the valve core is arranged in the connecting hole, and a guide sealing component is arranged between the valve core and the connecting hole.

[0032] A push rod is arranged at the upper end of the valve core, and the push rod passes through the through hole of the static iron core and is connected to the moving iron core;

[0033] The lower end of the valve core is provided with a sealing portion, and the sealing portion cooperates with the upper end opening of the working port.

[0034] As an improvement of the present invention, a seal is provided between the sleeve and the static iron core;

[0035] A guide post is arranged inside the working port, and the guide post extends into the guide hole at the bottom of the valve core;

[0036] The guide column is provided with a second air hole, the upper end of the valve core is provided with a third air hole communicating with the second air hole and the guide hole, and the through hole is communicated with the connecting hole.

[0037] As an improvement of the present invention, a sponge is provided between the end surface of the guide column and the end surface of the guide hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a cross-sectional structural schematic diagram of the present invention.

[0039] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0040] Figure 3 It is a half-section structural schematic diagram of the present invention.

[0041] Figure 4 The present invention Figure 3 Enlarged schematic diagram of the structure at point B in the middle.

[0042] Figure 5 It is a schematic diagram of the structure of the parts of the present invention in an exploded state.

[0043] Figure 6 It is a schematic diagram of the wire sleeve structure of the present invention.

[0044] Figure 7 It is a schematic diagram of the end cover structure of the present invention.

[0045] Figure 8 It is a schematic diagram of the valve core structure of the present invention.

[0046] Fig. 9 It is a schematic diagram of the gasket structure of the present invention.

[0047] As shown in the figure: 1. Shell assembly; 1.1. Accommodating cavity; 1.2. Shell; 1.3. End cover; 1.31. Connecting part; 1.32. Baffle; 1.33. Wiring cavity; 1.34. First vent hole; 1.35. Connecting part; 2. Moving iron core; 3. Stationary iron core; 3.1. First convex column; 3.2. Second convex column; 3.3. Sealing body; 4. Coil unit; 4.1. Wire sleeve; 4.11. Plate body; 4.111. Through groove; 4.112. Notch; 4.113. Protrusion; 4.113. Wire rack; 4.1131. Buckle; 4.2. Wire Ring; 5; sealing ring; 6, sleeve; 7, gasket; 7.1, spacer; 7.2, hole body; 8, first gap; 9, second gap; 10, third gap; 11, fourth gap; 12, conductive member; 13, valve seat; 13.1, flow channel; 13.2, working port; 13.3, guide column; 13.31, second air vent; 14, valve core; 14.1, push rod; 14.2, guide hole; 14.3, third air vent; 14.4, sealing part; 15, sponge; 16, guide ring; 16.1, sealing member; 17, spring; 18, rubber ring. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] See also Figure 1-9 As shown, a solenoid valve comprises:

[0050] The housing assembly 1 is provided with a receiving chamber 1.1, and an electromagnetic drive assembly is provided in the receiving chamber 1.1;

[0051] The electromagnetic drive assembly includes a moving iron core 2, a stationary iron core 3 arranged at the lower side of the moving iron core 2, and a coil unit 4 arranged at the outer side of the moving iron core 2;

[0052] The solenoid valve further comprises a valve seat 13, a valve core 14 and a reset assembly. The valve seat 13 is provided with a working port 13.2, and the medium enters the flow channel 13.1 through the working port 13.2;

[0053] The valve core 14 is arranged opposite to the working port 13.2, the valve core 14 is transmission-connected to the moving iron core 2, and the valve core 14 is connected to a reset assembly;

[0054] When the coil unit 4 is energized, the moving iron core 2 moves downward to cooperate with the static iron core 3, and drives the valve core 14 to close the working port 13.2.

[0055] When the coil unit 4 is powered off, the reset assembly drives the valve core 14 to move upward to open the working port 13.2 and drives the moving iron core 2 to move upward.

[0056] After adopting the above structure, the electromagnetic valve of the present invention has the following advantages compared with the prior art: when the coil unit 4 is energized, the moving iron core 2 moves downward to cooperate with the static iron core 3, and drives the valve core 14 to close the working port 13.2. At this time, the working port 13.2 and the flow channel 13.1 are cut off from each other, and the medium cannot pass through;

[0057] When the coil unit 4 is powered off, the reset assembly drives the valve core 14 to move upward to open the working port 13.2 and drives the moving iron core 2 to move upward. At this time, the working port 13.2 is connected to the flow channel 13.1, and the medium can pass through;

[0058] The valve core 14 is driven by the electromagnetic force of the coil unit 4 to close or open the working port 13.2, which has the characteristics of fast response speed and can quickly open or close the flow of the medium.

[0059] It can accurately control the flow and pressure of the medium, and is suitable for occasions that require precise control;

[0060] In addition, it has the characteristics of simple structure and convenient maintenance and overhaul.

[0061] As an improvement of the present invention, the housing assembly 1 includes a housing 1.2 and an end cover 1.3. The housing 1.2 is a cylindrical structure, and the upper and lower ends of the housing 1.2 are respectively opened.

[0062] The end cover 1.3 is arranged at the upper end of the housing 1.2, and the end cover 1.3 is provided with a connecting portion 1.31 extending into the upper end opening of the housing 1.2, and a sealing ring 5 is formed between the connecting portion 1.31 and the inner wall of the housing 1.2.

[0063] The static iron core 3 is connected to the lower opening of the housing 1.2, and a seal is formed between the static iron core 3 and the inner wall of the housing 1.2 through a sealing body 3.3;

[0064] A sealed accommodating cavity 1.1 is formed between the static iron core 3 and the end cover 1.3.

[0065] The shell 1.2 of the cylindrical structure is hollow inside. After the connection part 1.31 and the static iron core 3 are inserted into the shell 1.2, the sealing ring 5 between the connection part 1.31 and the inner wall of the shell 1.2 plays a sealing role, and the sealing body 3.3 between the static iron core 3 and the inner wall of the shell 1.2 plays a sealing role, so that a relatively sealed accommodating chamber 1.1 can be formed to accommodate the easily damaged parts to avoid damage and extend the service life;

[0066] The structure uses fewer parts, is highly compact, and has relatively low cost.

[0067] As an improvement of the present invention, a sleeve 6 is provided at the upper end of the static iron core 3, and the moving iron core 2 is provided in the sleeve 6; the lower end of the sleeve 6 can be connected to the upper end of the static iron core 3 by welding;

[0068] In the present application, the upper end of the static iron core 3 is provided with an upwardly extending plug-in body, and the bottom end of the sleeve 6 is provided with a sleeve portion with an enlarged diameter;

[0069] The plug-in body comprises a first protrusion 3.1 arranged at the upper end of the static iron core 3, and a second protrusion 3.2 arranged on the first protrusion 3.1;

[0070] The diameter of the second protrusion 3.2 is smaller than the diameter of the first protrusion 3.1.

[0071] The first protrusion 3.1 is for the sleeve portion to be sleeved, and the second protrusion 3.2 is for the inner wall of the sleeve 6 to be sleeved, preferably, the sleeves are sleeved in a tightly combined manner;

[0072] Preferably, a rubber ring 18 is provided between the second protruding column 3.2 and the inner wall of the sleeve portion to perform a sealing function so as to prevent foreign substances from entering.

[0073] The coil unit 4 includes a wire sleeve 4.1 and a coil 4.2 wound on the outside of the wire sleeve 4.1. The wire sleeve 4.1 is sleeved on the outside of the sleeve 6 through the inner hole, and a gasket 7 is arranged between the upper end of the wire sleeve 4.1 and the lower end of the connecting part 1.31. The lower end of the wire sleeve 4.1 is against the upper end surface of the static iron core 3.

[0074] Circular plates 4.11 are provided at the upper and lower ends of the wire sleeve 4.1, respectively. A washer 7 is disposed between the upper plate 4.11 and the lower end of the connecting portion 1.31. The lower plate 4.11 abuts against the upper end surface of the static iron core 3. The outer periphery of the plate 4.11 is supported by the inner wall of the housing 1.2. Winding grooves are formed between the plate 4.11 for winding the coil 4.2.

[0075] The position of the cable sleeve 4.1 is stable, not easy to shake, and has good silent performance;

[0076] And the wire cover 4.1 is detachable, which is convenient for later maintenance.

[0077] As an improvement of the present invention, the upper end of the gasket 7 is provided with a spacer 7.1 extending upward and closing inward, and the spacer 7.1 is placed in the gap between the inner hole of the connecting part 1.31 and the sleeve 6;

[0078] The washer 7 is fixed between the lower end of the connecting part 1.31 and the plate 4.11 at the upper end of the wire sleeve 4.1. The inner side of the spacer 7.1 forms an assembly hole which is sleeved on the upper end of the sleeve 6, and the bottom of the assembly hole is against the upper end of the sleeve 6. The upper end of the sleeve 6 is limited by the fixed washer 7, and the connection between the plug-in body and the lower end of the sleeve 6 is coordinated to further improve the stability of the position of the sleeve 6.

[0079] The gasket 7 and the spacer 7.1 are provided with a hole body 7.2 which passes through from top to bottom. A baffle 1.32 extending downward is provided on the inner side of the connecting part 1.31. The baffle 1.32 penetrates into the hole body 7.2, and a wiring cavity 1.33 is formed between the inner side of the baffle 1.32 and the inner wall of the connecting hole. A wire rack 4.113 is provided on the plate body 4.11 at the upper end of the wire sleeve 4.1, and a through groove 4.111 is provided on the plate body 4.11 corresponding to the wire rack 4.113. The wiring terminal of the coil 4.2 passes through the through groove 4.111 and is connected to the wire rack 4.113. The wire rack 4.113 can penetrate into the wiring cavity 1.33.

[0080] The conductive member 12 is embedded in the end cover 1.3, and one end of the conductive member 12 passes through the wiring cavity 1.33 and can be plugged into the wire rack 4.113, and contacts with the wiring terminal of the coil 4.2 to form an electrical connection;

[0081] After the above improvements, the structure is more compact, and the conductive member 12, the coil 4.2 and the electrical connection points are all in a relatively closed space, the sealing is improved, and contact with external substances is avoided, thereby extending the service life;

[0082] A buckling part is also provided at the lower end of the baffle 1.32, and a buckle 4.1131 extending upward is provided at the upper end of the wire rack 4.113, and the buckle 4.1131 can be buckled and connected with the buckling part, so as to further stabilize the position of the wire sleeve 4.1, and all components are stably in the preset assembly position.

[0083] A first gap 8 is formed between the inner side wall of the hole 7.2 at the upper end of the spacer 7.1 and the circumferential side of the upper end of the sleeve 6 and the inner wall of the baffle 1.32.

[0084] A second gap 9 is formed between the outer wall of the sleeve 6 and the inner hole of the wire sleeve 4.1.

[0085] A third gap 10 is formed between the bottom of the wire sleeve 4.1 and the upper end surface of the static iron core 3. The bottom of the wire sleeve 4.1 is protruding with a plurality of convex points, which support the upper end surface of the static iron core 3, and form a third gap 10 between the bottom of the wire sleeve 4.1 and the upper end surface of the static iron core 3;

[0086] The plate 4.11 at the bottom of the wire sleeve 4.1 is provided with a notch 4.112, and a notch 4.112 is also formed between the plate 4.11 at the top of the wire sleeve 4.1 and the inner wall of the housing 1.2, so that a fourth gap 11 can be formed outside the wire sleeve 4.1 and between the outside of the coil 4.2 and the inner wall of the housing 1.2;

[0087] The first gap 8, the second gap 9, the third gap 10, the fourth gap 11, and the wiring cavity 1.33 form a flow channel 13.1 structure that is interconnected;

[0088] The end cover 1.3 is provided with a first air vent 1.34 penetrating therethrough, an air guide gap is reserved between the upper end surface of the spacer 7.1 and the end cover 1.3, and the first air vent 1.34 is connected to the first gap 8 through the air guide gap;

[0089] Existing solenoid valves generally assemble their components in a sealed accommodating chamber 1.1. The driving area of ​​a car is very wide, and there are certain differences in the ambient air pressure in each area (for example, the ambient air pressure in some areas is higher, and the ambient air pressure in some areas is lower). When the car is used in the above-mentioned areas, there is a pressure difference between the accommodating chamber 1.1 of the solenoid valve and the external environment, which can easily cause the components to be deformed or loosened due to pressure, and the reliability is low).

[0090] After the above improvement, when there is a pressure difference between the accommodating chamber 1.1 and the external environment, the first air hole 1.34 is connected to the external environment to allow gas to pass through, which can balance the pressure difference between the accommodating chamber 1.1 and the outside world, and prevent the parts inside the accommodating chamber 1.1 from being deformed due to the pressure difference;

[0091] The above-mentioned component connection structure and flow channel 13.1 structure avoid the formation of a partitioned chamber in the accommodating chamber 1.1. The areas where the components are located in the accommodating chamber 1.1 can balance the pressure difference with the external environment, making the structural layout reasonable and compact, further avoiding the risk of deformation or loosening of components due to pressure difference between the inside and outside, and the reliability of the device operation is high.

[0092] As an improvement of the present invention,

[0093] The end cover 1.3 is provided with an extended plug-in portion 1.35, the plug-in portion 1.35 is for plugging the wiring terminal, and a plug-in cavity is provided inside the plug-in portion 1.35, and the other end of the conductive member 12 extends into the plug-in cavity;

[0094] The first vent hole 1.34 is arranged on the bottom wall of the plug-in cavity.

[0095] The first vent hole 1.34 is set through the bottom wall of the plug cavity, and the side wall of the plug part 1.35 plays a role in blocking the entry of foreign debris around the first vent hole 1.34, effectively reducing the entry of debris into the first vent hole 1.34. After the plug part 1.35 is connected to the terminal (usually the terminal has a plug body, and the plug body can be inserted into the plug cavity), the remaining gap of the plug cavity is reduced, further reducing the entry of debris into the first vent hole 1.34. At the same time, the first vent hole 1.34 can also connect the accommodating cavity 1.1 with the external environment to balance the pressure difference. The device operates reliably and has a long service life.

[0096] As an improvement of the present invention, the valve seat 13 is arranged at the lower end of the static iron core 3, a flow channel 13.1 is formed between the valve seat 13 and the static iron core 3, a working port 13.2 is arranged below the flow channel 13.1, and the upper end of the working port 13.2 is connected to the flow channel 13.1;

[0097] The static iron core 3 is provided with a connecting hole corresponding to the flow channel 13.1, the valve core 14 is arranged in the connecting hole, and a guide sealing component is arranged between the valve core 14 and the connecting hole.

[0098] A push rod 14.1 is disposed at the upper end of the valve core 14, and the push rod 14.1 passes through the through hole of the static iron core 3 and is connected to the moving iron core 2;

[0099] A sealing portion 14.4 is provided at the lower end of the valve core 14, and the sealing portion 14.4 cooperates with the upper end opening of the working port 13.2.

[0100] The hole wall of the connecting hole is provided with an annular groove, and the guide seal assembly includes a guide ring 16 and a seal 16.1 arranged in the annular groove, the guide ring 16 is for the ejector rod 14.1 to pass through, and the guide ring 16 is tightly combined with the ejector rod 14.1, and the seal 16.1 is arranged between the guide ring 16 and the annular groove to prevent the medium in the flow channel 13.1 from entering the connecting hole;

[0101] The guide ring 16 is made of PTFE material. The guide ring 16 made of PTFE material has the characteristics of wear resistance, high sealing performance, and self-lubrication, and can make the valve core 14 move up and down stably.

[0102] As an improvement of the present invention, a guide column 13.3 is provided inside the working port 13.2, and the guide column 13.3 extends into the guide hole 14.2 at the bottom of the valve core 14; the valve core 14 is sleeved on the outside of the connecting column through the guide hole 14.2, and the connecting column and the guide hole 14.2 are tightly combined to form a seal.

[0103] The reset assembly includes a spring 17, which is disposed between the connecting column and the guide hole 14.2.

[0104] When the moving iron core 2 moves downward and drives the valve core 14 downward, the spring 17 is compressed and pre-tightened. When the coil 4.2 is powered off, the pre-tightening force of the spring 17 drives the valve core 14 to move upward, and the push rod 14.1 at the upper end of the valve core 14 abuts against the bottom end of the moving iron core 2, so that the valve core 14 can drive the moving iron core 2 to move upward and reset.

[0105] The guide column 13.3 is provided with a second air hole 13.31, which is arranged inside the guide column 13.3. The upper end of the valve core 14 is provided with a third air hole 14.3 connecting the guide hole 14.2 and the connecting hole, and the through hole is connected with the connecting hole.

[0106] When in use, the gas can pass through the second air hole 13.31, the guide hole 14.2, the second air hole 13.31, the connecting hole, the through hole, and the connecting hole to balance the pressure difference between the sleeve 6 and the external environment.

[0107] The space where the moving iron core 2 is located will not form a chamber isolated from the outside world, further avoiding the risk of deformation or loosening of components due to pressure difference between the inside and outside.

[0108] As an improvement of the present invention, a sponge 15 is provided between the end surface of the guide column 13.3 and the end surface of the guide hole 14.2. The sponge 15 is provided inside the spring 17, the lower end of the sponge 15 abuts against the end surface of the guide column 13.3 and covers the second vent hole 13.31, and the upper end abuts against the bottom of the guide hole 14.2 and covers the third vent hole 14.3;

[0109] The gas needs to pass through the sponge 15, and the sponge 15 plays the role of filtering, shock absorption and noise absorption.

[0110] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A solenoid valve, It is characterized in that include: A housing assembly (1), the housing assembly (1) being provided with a receiving chamber (1.1), and an electromagnetic drive assembly being provided in the receiving chamber (1.1); The electromagnetic drive assembly comprises a moving iron core (2), a stationary iron core (3) arranged at the lower side of the moving iron core (2), and a coil unit (4) arranged at the outer side of the moving iron core (2); The solenoid valve further comprises a valve seat (13), a valve core (14) and a reset assembly; the valve seat (13) is provided with a working port (13.2), and a medium enters the flow channel (13.1) through the working port (13.2); The valve core (14) is arranged opposite to the working port (13.2), the valve core (14) is drivingly connected to the moving iron core (2), and the valve core (14) is connected to a reset component; When the coil unit (4) is energized, the moving iron core (2) moves downward to cooperate with the stationary iron core (3), and drives the valve core (14) to close the working port (13.2). When the coil unit (4) is powered off, the reset assembly drives the valve core (14) to move upward to open the working port (13.2) and drives the moving iron core (2) to move upward.

2. A solenoid valve according to claim 1, Features: The housing assembly (1) comprises an outer shell (1.2) and an end cover (1.3); the outer shell (1.2) is a cylindrical structure; the upper and lower ends of the outer shell (1.2) are respectively opened. The end cover (1.3) is arranged at the upper end of the outer shell (1.2), and the end cover (1.3) is provided with a connecting portion (1.31) extending into the upper end opening of the outer shell (1.2), and a seal is formed between the connecting portion (1.31) and the inner wall of the outer shell (1.2) via a sealing ring (5). The static iron core (3) is connected to the lower opening of the outer shell (1.2), and a seal is formed between the static iron core (3) and the inner wall of the outer shell (1.2) via a sealing body (3.3); A sealed accommodating cavity (1.1) is formed between the static iron core (3) and the end cover (1.3).

3. A solenoid valve according to claim 2, Features: A sleeve (6) is provided at the upper end of the static iron core (3), and the moving iron core (2) is arranged in the sleeve (6); The coil unit (4) comprises a wire sleeve (4.1) and a coil (4.2) wound on the outside of the wire sleeve (4.1); the wire sleeve (4.1) is sleeved on the outside of the sleeve (6) through an inner hole; a washer (7) is disposed between the upper end of the wire sleeve (4.1) and the lower end of the connecting portion (1.31); and the lower end of the wire sleeve (4.1) abuts against the upper end surface of the static iron core (3).

4. A solenoid valve according to claim 3, Features: The upper end of the gasket (7) is provided with a spacer (7.1) which extends upward and then closes inward, and the spacer (7.1) is placed in the gap between the inner hole of the connecting part (1.31) and the sleeve (6); The gasket (7) and the spacer (7.1) are provided with a hole (7.2) extending upward and downward, the inner side of the connecting portion (1.31) is provided with a baffle (1.32) extending downward, the baffle (1.32) penetrates into the hole (7.2), and a wiring cavity (1.33) is formed between the inner side of the baffle (1.32) and the inner wall of the connecting hole, and the wiring terminal of the coil (4.2) at the upper end of the wire sleeve (4.1) passes through the hole (7.2) into the wiring cavity (1.33) and is electrically connected to the conductive member (12) in the wiring cavity (1.33); A first gap (8) is formed between the inner side wall of the hole body (7.2) at the upper end of the spacer (7.1), the circumferential side of the upper end of the sleeve (6) and the inner wall of the baffle (1.32), a second gap (9) is formed between the outer wall of the sleeve (6) and the inner hole of the wire sleeve (4.1), a third gap (10) is formed between the bottom of the wire sleeve (4.1) and the upper end surface of the static iron core (3), and a fourth gap (11) is formed between the outer side of the wire sleeve (4.1), the outer side of the coil (4.2) and the inner wall of the housing (1.2); The first gap (8), the second gap (9), the third gap (10), the fourth gap (11), and the wiring cavity (1.33) form a flow channel (13.1) structure that is interconnected; The end cover (1.3) is provided with a first air vent (1.34) extending therethrough, and the first air vent (1.34) is communicated with the first gap (8).

5. A solenoid valve according to claim 4, Features: A conductive member (12) is embedded in the end cover (1.3), and one end of the conductive member (12) penetrates into the wiring cavity (1.33) and is electrically connected to the wiring terminal of the coil (4.2); The end cover (1.3) is provided with an extended plug-in portion (1.35), the plug-in portion (1.35) is for plugging the connection terminal, a plug-in cavity is provided inside the plug-in portion (1.35), and the other end of the conductive member (12) extends into the plug-in cavity; The first vent hole (1.34) is arranged on the bottom wall of the plug-in cavity.

6. A solenoid valve according to claim 2, Features: The valve seat (13) is arranged at the lower end of the static iron core (3), the flow channel (13.1) is formed between the valve seat (13) and the static iron core (3), the working port (13.2) is arranged below the flow channel (13.1), and the upper end of the working port (13.2) is connected to the flow channel (13.1); The static iron core (3) is provided with a connecting hole corresponding to the flow channel (13.1), the valve core (14) is arranged in the connecting hole, and a guide sealing component is arranged between the valve core (14) and the connecting hole. A push rod (14.1) is provided at the upper end of the valve core (14), and the push rod (14.1) passes through the through hole of the static iron core (3) and is connected to the moving iron core (2); A sealing portion (14.4) is provided at the lower end of the valve core (14), and the sealing portion (14.4) cooperates with the upper end opening of the working port (13.2).

7. A solenoid valve according to claim 6, Features: A sealing arrangement between the sleeve (6) and the static iron core (3); A guide column (13.3) is arranged inside the working port (13.2), and the guide column (13.3) extends into a guide hole (14.2) at the bottom of the valve core (14); The guide column (13.3) is provided with a second air hole (13.31), the upper end of the valve core (14) is provided with a third air hole (14.3) communicating with the second air hole (13.31) and the guide hole (14.2), and the through hole is communicated with the connecting hole.

8. A solenoid valve according to claim 7, Features: A sponge (15) is provided between the end surface of the guide column (13.3) and the end surface of the guide hole (14.2).

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