An electromagnetic valve

Abstract

The utility model relates to control element technical field especially relates to a kind of electromagnetic valve, including valve body, sealing element, valve core and reset spring, flow main channel is equipped in valve body, sealing element is fixedly arranged in flow main channel, sliding hole is equipped in sealing element along first direction and is through, valve core is arranged in flow main channel, and it is slidably connected in sliding hole along first direction, sealing element is provided with the inner tab that is inwards protruding in sliding hole, and the axis of sliding hole is arranged around the inner tab, the outer side wall of valve core is annularly provided with outer tab, reset spring is located in sliding hole, and it is sleeved in the outer side of valve core, and the both ends of reset spring respectively abut on the side surface of inner tab relative to first direction and the side surface of outer tab relative to first direction. In conclusion, the utility model electromagnetic valve will not increase the overall axial length due to reset spring, also will not weaken magnetic field intensity, can effectively guarantee the compactness of electromagnetic valve structure, and the timeliness and accuracy of opening and closing.

Description

Technical Field

[0001] This utility model relates to the field of control element technology, and in particular to a solenoid valve. Background Technology

[0002] Solenoid valves are control components in fluid systems and are widely used in automation control, hydraulics, pneumatics, automobile manufacturing, and many other fields. When energized, the solenoid valve attracts the moving iron core on the valve core through the stationary iron core, driving the moving iron core to move the valve core axially, thus opening or closing the valve port. When de-energized, the valve core returns to its original position due to the elastic force of the return spring. Currently, in some solenoid valves, the return spring is located between the moving iron core and the stationary iron core. The spring's two ends abut against the end faces of the moving and stationary iron cores respectively to provide a return function. While this solution is simple and reliable, it requires sufficient axial installation space between the moving and stationary iron cores, significantly increasing the overall axial length of the solenoid valve. This hinders miniaturization and lightweight design, making it difficult to meet the needs of compact installation scenarios. To address this issue, some other solenoid valves, such as the invention patent CN102007305B entitled "A Balanced Solenoid Valve," have axial return holes on both the end faces of the moving and stationary iron cores. The spring is internally mounted within these two return holes to reduce the space between the moving and stationary iron cores, making the solenoid valve structure more compact. However, this return hole reduces the effective magnetic conductive area of ​​the moving and stationary iron cores, leading to a decrease in magnetic field strength and electromagnetic driving force on the valve core. This, in turn, reduces the valve core's movement speed, decreasing the solenoid valve's response sensitivity and reducing the timeliness and accuracy of its opening and closing. Utility Model Content

[0003] The purpose of this utility model is to provide a solenoid valve to solve the technical problem that some solenoid valves, in order to ensure their compact structure, have reset holes in the stationary iron core and the moving iron core, which reduces the effective magnetic field area of ​​the moving iron core and the stationary iron core, resulting in a decrease in magnetic field strength, a decrease in the electromagnetic driving force on the valve core, and a decrease in the moving speed of the valve core, thus reducing the response sensitivity of the solenoid valve and reducing the timeliness and accuracy of the opening and closing of the solenoid valve.

[0004] To achieve the above objectives, this utility model provides an electromagnetic valve, including a valve body, a seal, a valve core, and a return spring. The valve body has a main flow channel, the seal is fixedly disposed in the main flow channel, and the seal has a sliding hole extending along a first direction. The valve core is disposed in the main flow channel and slidably connected to the sliding hole along the first direction. The seal has an inner protrusion protruding inward from the sliding hole, the inner protrusion being arranged around the axis of the sliding hole. The outer side wall of the valve core is circumferentially provided with an outer protrusion. The return spring is located in the sliding hole and sleeved on the outer side of the valve core. The two ends of the return spring abut against the side of the inner protrusion relative to the first direction and the side of the outer protrusion relative to the first direction, respectively.

[0005] Optionally, the inner diameter of the inner protrusion is larger than the outer diameter of the outer protrusion, the return spring is a pagoda spring, and the larger end of the return spring abuts against the inner protrusion and the smaller end abuts against the outer protrusion.

[0006] Optionally, the end of the return spring near the inner protrusion is slidably connected to the sliding hole, and the end of the return spring near the outer protrusion is slidably connected to the valve core.

[0007] Optionally, the inner protrusion is located on the side of the seal relative to the first direction, and the inner protrusion has a break through the outer side wall and the inner side wall of the inner protrusion.

[0008] Optionally, the sliding hole includes a first hole segment and a second hole segment that are connected to each other. The first hole segment and the second hole segment respectively penetrate to two sides of the seal relative to the first direction. The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. The inner protrusion is provided on the side of the seal that is penetrated by the first hole segment, and the outer protrusion is slidably connected to the second hole segment.

[0009] Optionally, the outer wall of the outer protrusion is provided with a first sealing groove, and the inner ring of the first sealing groove is provided with a first sealing ring, which is sealed and connected to the first sealing groove and the second hole segment.

[0010] Optionally, one side of the valve body relative to the first direction is designated as the mounting side, the main flow channel extends through the first direction to the mounting side, the seal is installed on the side of the valve body with the mounting side and extends into the main flow channel, and the inner protrusion and the outer protrusion are arranged sequentially from the depth of the main flow channel to the mounting side.

[0011] Optionally, the main flow channel includes a first channel segment extending through to the mounting side. The seal extends into the first channel segment and forms a sealing space with the bottom surface of the first channel segment. The outer wall of the valve core is provided with a sealing protrusion, which is located within the sealing space. The valve body is also provided with a first flow channel and a second flow channel. The first flow channel and the second flow channel are spaced apart in a first direction and are connected to the periphery of the main flow channel and the outer surface of the valve body. The sealed space is provided with a sealing area between the first flow channel and the second flow channel, and the sealed space has at least a first position and a second position. The valve core can move along the first direction to drive the sealing protrusion to the first position and the second position. When the sealing protrusion is in the first position, the sealing protrusion forms a sealing fit with the sealing area to block the communication between the first flow channel and the second flow channel; When the sealing protrusion is in the second position, the sealing protrusion disengages from the sealing area, so that the first flow channel communicates with the second flow channel.

[0012] Optionally, the main flow channel further includes a second channel segment connected to the first channel segment at the end away from the mounting side. The inner diameter of the first channel segment is larger than the inner diameter of the second channel segment. The outer wall of the valve core is also provided with a protrusion, which is located inside the second channel segment and slidably connected to the second channel segment.

[0013] Optionally, it also includes a mounting component, a mounting housing, and a stationary iron core. The mounting component is located at the end of the seal away from the valve body and has a mounting hole that extends through in a first direction. The mounting hole communicates with the sliding hole. The mounting housing is located outside the mounting component and the seal and is detachably mounted on the mounting side. The two ends of the mounting component along the first direction abut against the mounting housing and the seal, respectively. One end of the valve core is provided with a moving iron core that extends into the mounting hole. The stationary iron core is mounted on the mounting housing and extends into the mounting hole. The moving iron core and the stationary iron core are arranged opposite to each other.

[0014] Compared with the prior art, the electromagnetic valve implemented in this utility model has the following advantages: In this solenoid valve, the valve core can slide along the sliding hole of the sealing element in the main flow channel to different positions in the first direction, and is sealed and connected to a specific area in the main flow channel to realize the opening and closing function of the solenoid valve. Furthermore, a return spring is sleeved on the outside of the valve core, and its two ends abut against the inner protrusion protruding from the return hole on the sealing element and the outer protrusion on the outer wall of the valve core, respectively, to continuously apply a thrust for reset to the sealing element and the valve core, so that the solenoid valve can achieve the reset function through the return spring when de-energized. In summary, since the return spring is not located at one end of the valve core along the first direction, and no return hole is provided to accommodate the return spring, the solenoid valve of this invention will not increase the overall axial length due to the return spring, nor will it weaken the magnetic field strength, effectively ensuring the structural compactness of the solenoid valve, as well as the timeliness and accuracy of opening and closing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the solenoid valve of this utility model.

[0016] Figure 2 This is a front view of the solenoid valve of this utility model.

[0017] Figure 3 This is a top view of the solenoid valve of this utility model.

[0018] Figure 4 for Figure 3 Sectional view of AA.

[0019] Figure 5 for Figure 4 A magnified view of part B in the middle.

[0020] Figure 6 This is a schematic diagram of the structure of the sealing element of this utility model.

[0021] Reference numerals: 1. Valve body; 11. Main flow channel; 111. First channel section; 112. Second channel section; 12. Mounting side; 13. Sealing space; 14. First flow channel; 15. Second flow channel; 2. Seal; 21. Sliding hole; 211. First hole section; 212. Second hole section; 22. Inner protrusion; 221. Break; 23. Connecting hole; 3. Valve core; 31. Outer protrusion; 311. First sealing groove; 32. Sealing protrusion; 33. Raised block; 331. Second sealing groove; 4. Return spring; 5a. First sealing ring; 5b. Second sealing ring; 6. Mounting component; 61. Mounting hole; 7. Mounting housing; 8. Stationary iron core; 9. Moving iron core; 10. Sealing area; 20. Valve cover. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] like Figures 1 to 6 As shown, a solenoid valve of this utility model includes a valve body 1, a sealing element 2, a valve core 3, and a return spring 4. The valve body 1 has a main flow channel 11. The sealing element 2 is fixedly disposed in the main flow channel 11 and has a sliding hole 21 extending in a first direction. The valve core 3 is disposed in the main flow channel 11 and is slidably connected to the sliding hole 21 in the first direction. The sealing element 2 has an inner protrusion 22 protruding inward from the sliding hole 21. The inner protrusion 22 is arranged around the axis of the sliding hole 21. The outer side wall of the valve core 3 is provided with an outer protrusion 31. The return spring 4 is located in the sliding hole 21 and sleeved on the outer side of the valve core 3. The two ends of the return spring 4 abut against the side of the inner protrusion 22 relative to the first direction and the side of the outer protrusion 31 relative to the first direction, respectively.

[0026] In the above technical solution, the valve core 3 can slide to different positions along the sliding hole 21 of the seal 2 in the first direction within the main flow channel 11, and is sealed and connected to a specific area within the main flow channel 11 to realize the opening and closing function of the solenoid valve. Furthermore, the return spring 4 is sleeved on the outside of the valve core 3, and its two ends respectively abut against the inner protrusion 22 protruding from the reset hole on the seal 2 and the outer protrusion 31 on the outer wall of the valve core 3, so as to continuously apply a resetting force to the seal 2 and the valve core 3, so that the solenoid valve can achieve the reset function through the return spring 4 when de-energized. In summary, since the return spring 4 is not located at one end of the valve core 3 along the first direction, and no reset hole is provided for accommodating the return spring 4, the solenoid valve of this utility model will not increase the overall axial length due to the return spring 4, nor will it weaken the magnetic field strength, effectively ensuring the structural compactness of the solenoid valve, as well as the timeliness and accuracy of opening and closing.

[0027] Furthermore, the inner diameter of the inner protrusion 22 is larger than the outer diameter of the outer protrusion 31, and the return spring 4 is a pagoda spring, with the larger end of the return spring 4 abutting against the inner protrusion 22 and the smaller end abutting against the outer protrusion 31.

[0028] The inner diameter of the inner protrusion 22 is larger than the outer diameter of the outer protrusion 31, and a return spring 4 is provided between them, so that there is a large gap between the outer protrusion 31 and the outer side wall of the valve core 3. After the valve core 3 is inserted into the main flow channel 11 and the sliding hole 21 of the sealing member 2 is inserted into the main flow channel 11 corresponding to the valve core 3, the return spring 4 can be installed between the inner protrusion 22 and the outer protrusion 31 along the aforementioned gap to realize the assembly of the return spring 4. Specifically, the return spring 4 can be inserted laterally and pass through the aforementioned gap. After moving between the inner protrusion 22 and the outer protrusion 31, the posture of the return spring 4 is adjusted.

[0029] Furthermore, the end of the return spring 4 near the inner protrusion 22 is slidably connected to the sliding hole 21, and the end of the return spring 4 near the outer protrusion 31 is slidably connected to the valve core 3, so that the two ends of the return spring 4 can respectively conform to the outer side wall of the sliding hole 21 and the valve core 3 to ensure the direction of extension and retraction of the return spring 4 and prevent it from deviating radially.

[0030] Furthermore, the inner protrusion 22 is provided on the side of the seal 2 relative to the first direction, and the inner protrusion 22 is provided with a break 221 that penetrates the outer side wall and the inner side wall of the inner protrusion 22.

[0031] In this process, after inserting the smaller end of the return spring 4 between the outer protrusion 31 and the inner protrusion 22, rotating the return spring 4 allows its spring wire to pass through the break 221, thereby inserting the entire return spring 4 between the outer protrusion 31 and the inner protrusion 22.

[0032] Furthermore, the sliding hole 21 includes a first hole segment 211 and a second hole segment 212 that are connected to each other. The first hole segment 211 and the second hole segment 212 respectively penetrate to two sides of the sealing member 2 relative to the first direction. The inner diameter of the first hole segment 211 is larger than the inner diameter of the second hole segment 212. The inner protrusion 22 is provided on the side of the sealing member 2 that is penetrated by the first hole segment 211. The outer protrusion 31 is slidably connected to the second hole segment 212.

[0033] The first hole segment 211 and the second hole segment 212 make the sliding hole 21 have a stepped structure. The inner diameter of the first hole segment 211 is larger and there is a larger gap between it and the valve core 3, which is used to accommodate the return spring 4. The second hole segment 212 is slidably connected to the outer protrusion 31 to ensure that the valve core 3 moves along the first direction.

[0034] Furthermore, the outer wall of the outer protrusion 31 is provided with a first sealing groove 311, and the inner ring of the first sealing groove 311 is provided with a first sealing ring 5a, which is sealed and connected to the first sealing groove 311 and the second hole segment 212.

[0035] The first sealing ring 5a is used to block the space on both sides of the outer protrusion 31 to prevent the medium flowing through the solenoid valve from leaking to the side of the return spring 4, thereby affecting the operation of the components on the side of the return spring 4.

[0036] Furthermore, one side of the valve body 1 relative to the first direction is designated as the mounting side 12, the main flow channel 11 extends through the mounting side 12 along the first direction, the sealing member 2 is installed on the side of the valve body 1 with the mounting side 12 and extends into the main flow channel 11, and the inner protrusion 22 and the outer protrusion 31 are arranged sequentially from the depth of the main flow channel 11 to the mounting side 12.

[0037] The valve core 3 can be inserted into the main flow channel 11 from the mounting side 12. Then, the sliding hole 21 of the seal 2 is aligned with the valve core 3. Next, the seal 2 is inserted into the main flow channel 11 and simultaneously fitted onto the outside of the valve core 3, so that the valve core 3 and the seal 2 are assembled into the valve body 1.

[0038] Furthermore, the main flow channel 11 includes a first channel segment 111 and a second channel segment 112 that are connected. The first channel segment 111 extends through to the mounting side 12, and the inner diameter of the first channel segment 111 is larger than the inner diameter of the second channel segment 112. The sealing member 2 extends into the first channel segment 111 and forms a sealing space 13 with the bottom surface of the first channel segment 111. The outer wall of the valve core 3 is provided with a sealing protrusion 32, which is located within the sealing space 13. The valve body 1 also has a first flow channel 14 and a second flow channel 15, which are spaced apart in a first direction and communicate with the periphery of the main flow channel 11 and the valve. The outer surface of body 1; the sealing space 13 is provided with a sealing region 10 between the first flow channel 14 and the second flow channel 15, and the sealing space 13 has at least a first position and a second position. The valve core 3 can move along a first direction to drive the sealing protrusion 32 to be located in the first position and the second position. When the sealing protrusion 32 is located in the first position, the sealing protrusion 32 forms a sealing fit with the sealing region 10 to block the communication between the first flow channel 14 and the second flow channel 15. When the sealing protrusion 32 is located in the second position, the sealing protrusion 32 disengages from the sealing region 10 so that the first flow channel 14 is connected to the second flow channel 15.

[0039] The first channel segment 111 and the second channel segment 112 give the main flow channel 11 a stepped structure. The inner diameter of the first channel segment 111 is larger to accommodate the seal 2 and form a sealing space 13 between it and the seal 2, so that the sealing protrusion 32 on the valve core 3 can move to the first position and the second position in the first direction within the sealing space 13, thereby switching the first flow channel 14 and the second flow channel 15 that penetrate the main flow channel 11 between being connected and isolated.

[0040] In some embodiments, the first flow channel 14 and the second flow channel 15 both extend through the first hole segment 211. In this case, the first flow channel 14 is directly connected to the sealing space 13. The outer wall of the seal 2 is provided with a connecting hole 23 between the outer protrusion 31 and the sealing protrusion 32. The connecting hole 23 extends through the outer wall of the seal 2 to the sliding hole 21. The second flow channel 15 is directly connected to the sliding hole 21. The sealing area 10 is located at the opening of the sliding hole 21 near the sealing protrusion 32.

[0041] In other embodiments, the main flow channel 11 further includes a second channel segment 112 connected to the first channel segment 111, which is located at the end of the first channel segment 111 away from the mounting side 12. The inner diameter of the first channel segment 111 is larger than the inner diameter of the second channel segment 112. The first flow channel 14 and the second flow channel 15 respectively penetrate to the first hole segment 211 and the second hole segment 212. The first flow channel 14 is directly connected to the sealing space 13. In this case, the sealing area 10 is located at the junction of the first channel segment 111 and the second channel segment 112.

[0042] Furthermore, the main flow channel 11 also includes a second channel segment 112 connected to the first channel segment 111. The second channel segment 112 is located at the end of the first channel segment 111 away from the mounting side 12. The inner diameter of the first channel segment 111 is larger than the inner diameter of the second channel segment 112. The outer wall of the valve core 3 is also provided with a protrusion 33, which is located inside the second channel segment 112 and is slidably connected to the second channel segment 112.

[0043] The outer protrusion 31 is slidably connected to the sliding hole 21 on one side of the sealing protrusion 32 along the first direction, and the protrusion 33 is slidably connected to the second channel section 112 on the other side of the sealing protrusion 32 along the first direction, so as to ensure the smooth movement of the valve core 3 along the first direction.

[0044] Furthermore, it also includes a mounting component 6, a mounting housing 7, and a stationary iron core 8. The mounting component 6 is located at the end of the sealing element 2 away from the valve body 1 and has a mounting hole 61 extending along a first direction. The mounting hole 61 communicates with the sliding hole 21. The mounting housing 7 is located on the outside of the mounting component 6 and the sealing element 2 and is detachably mounted on the mounting side 12. The two ends of the mounting component 6 along the first direction respectively abut against the mounting housing 7 and the sealing element 2. One end of the valve core 3 is provided with a moving iron core 9, which extends into the mounting hole 61. The stationary iron core 8 is mounted on the mounting housing 7 and extends into the mounting hole 61. The moving iron core 9 and the stationary iron core 8 are arranged opposite to each other.

[0045] The mounting housing 7 is detachably mounted on the mounting side 12 to abut against the mounting member 6, which in turn abuts against the sealing member 2. The sealing member 2 then abuts against the valve body 1 (which can be the mounting side 12), thus fixing the mounting member 6 and the sealing member 2 to the inner side of the mounting housing 7. Furthermore, the stationary iron core 8 is mounted on the mounting housing 7 and located within the mounting hole 61, opposite the moving iron core 9 at one end of the valve core 3. When the solenoid valve is energized, the stationary iron core 8 attracts the moving iron core 9 to move closer to the stationary iron core 8, thereby driving the valve core 3 to move closer to the stationary iron core 8. Additionally, the coil can be wound around the outside of the mounting member 6.

[0046] Furthermore, it also includes a valve cover 20, with one end of the main flow channel 11 away from the mounting side 12 extending to the outer side of the valve body 1. The valve cover 20 is detachably mounted on the valve body 1 and blocks the end of the main flow channel 11 away from the seal 2.

[0047] Furthermore, the outer wall of the protrusion 33 is provided with a second sealing groove 331, and the inner ring of the second sealing groove 331 is provided with a second sealing ring 5b, which is sealed and connected to the second sealing groove 331 and the second channel section 112.

[0048] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit ​​connection.

[0049] Furthermore, detachable connection and detachable setting refer to the ability of two components to be repeatedly assembled and disassembled without damage or severe deformation, including but not limited to fixing by connectors or fixing by snap-fit ​​connections.

[0050] Furthermore, sliding connection and sliding setting refer to the connection between two connected components, where one component can slide along a fixed trajectory on the other component, including but not limited to connection by sliding a slider into a groove, or connection by inserting a slider into a hole whose size and profile match the slider.

[0051] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.

[0052] In summary, the present invention provides a solenoid valve, the technical effects of which are as follows: In this solenoid valve, the valve core 3 can slide along the sliding hole 21 of the sealing member 2 in the first direction within the main flow channel 11 to different positions and is sealed and connected to a specific area within the main flow channel 11 to realize the opening and closing function of the solenoid valve. Furthermore, a return spring 4 is sleeved on the outside of the valve core 3, with its two ends abutting against the inner protrusion 22 protruding from the return hole on the sealing member 2 and the outer protrusion 31 on the outer wall of the valve core 3, respectively, to continuously apply a thrust for reset to the sealing member 2 and the valve core 3, so that the solenoid valve can achieve the reset function through the return spring 4 when de-energized. In summary, since the return spring 4 is not located at one end of the valve core 3 along the first direction, and no return hole is provided for accommodating the return spring 4, the solenoid valve of this invention will not increase the overall axial length due to the return spring 4, nor will it weaken the magnetic field strength, effectively ensuring the structural compactness of the solenoid valve, as well as the timeliness and accuracy of opening and closing.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A solenoid valve, characterized in that, The valve body (1), sealing element (2), valve core (3), and return spring (4) are included. The valve body (1) is provided with a main flow channel (11). The sealing element (2) is fixedly disposed in the main flow channel (11). The sealing element (2) is provided with a sliding hole (21) that runs through a first direction. The valve core (3) is disposed in the main flow channel (11) and is slidably connected to the sliding hole (21) in the first direction. The sealing element (2) is provided with an inner protrusion (22) that protrudes inward from the sliding hole (21). The inner protrusion (22) is arranged around the axis of the sliding hole (21). The outer side wall of the valve core (3) is provided with an outer protrusion (31). The return spring (4) is located in the sliding hole (21) and sleeved on the outer side of the valve core (3). The two ends of the return spring (4) abut against the side of the inner protrusion (22) relative to the first direction and the side of the outer protrusion (31) relative to the first direction, respectively.

2. The solenoid valve according to claim 1, characterized in that, The inner diameter of the inner protrusion (22) is larger than the outer diameter of the outer protrusion (31). The reset spring (4) is a pagoda spring. The larger end of the reset spring (4) abuts against the inner protrusion (22), and the smaller end abuts against the outer protrusion (31).

3. The solenoid valve according to claim 2, characterized in that, The end of the return spring (4) near the inner protrusion (22) is slidably connected to the sliding hole (21), and the end of the return spring (4) near the outer protrusion (31) is slidably connected to the valve core (3).

4. The solenoid valve according to claim 2, characterized in that, The inner protrusion (22) is provided on the side of the seal (2) relative to the first direction, and the inner protrusion (22) has a break (221) that penetrates the outer side wall and the inner side wall of the inner protrusion (22).

5. The solenoid valve according to claim 2, characterized in that, The sliding hole (21) includes a first hole segment (211) and a second hole segment (212) that are connected. The first hole segment (211) and the second hole segment (212) respectively penetrate to two sides of the seal (2) relative to the first direction. The inner diameter of the first hole segment (211) is larger than the inner diameter of the second hole segment (212). The inner protrusion (22) is provided on the side of the seal (2) that is penetrated by the first hole segment (211). The outer protrusion (31) is slidably connected to the second hole segment (212).

6. The solenoid valve according to claim 5, characterized in that, The outer wall of the outer protrusion (31) is provided with a first sealing groove (311), and the inner ring of the first sealing groove (311) is provided with a first sealing ring (5a). The first sealing ring (5a) is sealed and connected to the first sealing groove (311) and the second hole segment (212).

7. The solenoid valve according to claim 1, characterized in that, The valve body (1) is provided with a mounting side (12) on one side relative to the first direction. The main flow channel (11) extends through the mounting side (12) along the first direction. The sealing element (2) is installed on the side of the valve body (1) provided with the mounting side (12) and extends into the main flow channel (11). The inner protrusion (22) and the outer protrusion (31) are arranged sequentially from the depth of the main flow channel (11) to the mounting side (12).

8. The solenoid valve according to claim 7, characterized in that, The main flow channel (11) includes a first channel section (111), which extends through to the mounting side (12). The sealing element (2) extends into the first channel section (111) and forms a sealing space (13) with the bottom surface of the first channel section (111). The outer wall of the valve core (3) is provided with a sealing protrusion (32), which is located in the sealing space (13). The valve body (1) is also provided with a first flow channel (14) and a second flow channel (15). The first flow channel (14) and the second flow channel (15) are spaced apart in a first direction and are connected to the periphery of the main flow channel (11) and the outer surface of the valve body (1). The sealing space (13) is provided with a sealing area (10) between the first flow channel (14) and the second flow channel (15), and the sealing space (13) has at least a first position and a second position. The valve core (3) can move along the first direction to drive the sealing protrusion (32) to be located in the first position and the second position. When the sealing protrusion (32) is in the first position, the sealing protrusion (32) forms a sealing fit with the sealing area (10) to block the communication between the first flow channel (14) and the second flow channel (15); When the sealing protrusion (32) is in the second position, the sealing protrusion (32) is disengaged from the sealing area (10) so that the first flow channel (14) is connected to the second flow channel (15).

9. The solenoid valve according to claim 8, characterized in that, The main flow channel (11) also includes a second channel segment (112) connected to the first channel segment (111) away from the mounting side (12). The inner diameter of the first channel segment (111) is larger than the inner diameter of the second channel segment (112). The outer wall of the valve core (3) is also provided with a protrusion (33). The protrusion (33) is located inside the second channel segment (112) and is slidably connected to the second channel segment (112).

10. The solenoid valve according to claim 7, characterized in that, It also includes a mounting component (6), a mounting housing (7), and a stationary iron core (8). The mounting component (6) is located at the end of the sealing element (2) away from the valve body (1) and has a mounting hole (61) that runs through the first direction. The mounting hole (61) is connected to the sliding hole (21). The mounting housing (7) is located on the outside of the mounting component (6) and the sealing element (2) and is detachably mounted on the mounting side (12). The two ends of the mounting component (6) along the first direction respectively abut against the mounting housing (7) and the sealing element (2). One end of the valve core (3) is provided with a moving iron core (9). The moving iron core (9) extends into the mounting hole (61). The stationary iron core (8) is mounted on the mounting housing (7) and extends into the mounting hole (61). The moving iron core (9) and the stationary iron core (8) are arranged opposite to each other.

Images