Electromagnetic coil and solenoid valve

Abstract

The present application discloses an electromagnetic coil and a solenoid valve. The electromagnetic coil includes: a coil bobbin made of steel material; an enameled wire wound outside the coil bobbin and insulated and spaced apart from the coil bobbin; a PCB circuit board mounted on the coil bobbin, and the PCB circuit board is electrically connected to the enameled wire and an external wire; a limiting member mounted on the coil bobbin and protruding from the outer peripheral wall of the coil bobbin. For the electromagnetic coil of the present application, the electromagnetic coil can be installed in a bottle valve, which is beneficial to reducing the risk of the bottle valve failing under external collision. The structure of the electromagnetic coil is simple, the number of components is small, and the installation steps are fewer, which is beneficial to improving the installation efficiency. Moreover, the enameled wire is connected to the external wire through the PCB board, and high integration can be achieved in a limited space.

Description

Technical Field

[0001] This application relates to the technical field of control valve manufacturing, and particularly to an electromagnetic coil and a solenoid valve having the electromagnetic coil. Background Art

[0002] In related technologies, for the bottle valve of a 70MPa hydrogen storage system, due to the relatively high working pressure, the internal solenoid valve usually adopts a pilot-operated structure. The solenoid valve generally consists of an electromagnetic coil, a magnetic isolation tube, an armature, a stop iron, a pilot valve core, a main valve core, a return spring, etc. The traditional electromagnetic coil usually consists of a coil skeleton, enameled wire, a magnetic yoke, an injection-molded housing, etc. This type of electromagnetic coil can only be installed outside the bottle valve, has a large volume and poor safety, the structural strength of the coil skeleton is relatively low, and a separate magnetic isolation ring material needs to be added. The electromagnetic force efficiency is relatively low, and the overall structure of the electromagnetic coil is relatively complex, leaving room for improvement. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, an object of this application is to provide an electromagnetic coil with a simple structure, which can be installed inside the bottle valve, has high safety, and a low magnetic leakage rate.

[0004] The electromagnetic coil according to an embodiment of this application includes: a coil skeleton made of steel material; enameled wire wound outside the coil skeleton and insulated and spaced apart from the coil skeleton; a PCB circuit board installed on the coil skeleton, and the PCB circuit board is electrically connected to the enameled wire and an external wire; a limiting member installed on the coil skeleton and protruding on the outer peripheral wall of the coil skeleton.

[0005] The electromagnetic coil according to an embodiment of this application can be installed inside the bottle valve, which is beneficial to reducing the risk of the bottle valve failing under external collisions. The structure of the electromagnetic coil is simple, the number of components is small, and the installation steps are fewer, which is beneficial to improving the installation efficiency. Moreover, the enameled wire is connected to the external wire through the PCB board, and high integration can be achieved in a limited space.

[0006] In the electromagnetic coil according to some embodiments of this application, the coil skeleton includes a first installation section and a second installation section. The enameled wire is wound outside the first installation section, the PCB circuit board is installed on the second installation section, and a first limiting convex section protruding radially outward is provided at the connection between the first installation section and the second installation section.

[0007] For the electromagnetic coil according to some embodiments of the present application, one end of the second mounting section away from the first mounting section is provided with a second limiting convex section protruding radially outward. One end of the second limiting convex section facing the second mounting section is provided with a mounting notch. The PCB circuit board is located between the first limiting convex section and the second limiting convex section, and at least part of the PCB circuit board is supported in the mounting notch.

[0008] For the electromagnetic coil according to some embodiments of the present application, the limiting member includes a steel ball. The outer peripheral wall of the coil skeleton is provided with a mounting hole, and the steel ball is press-fitted into the mounting hole and at least part of the steel ball protrudes out of the mounting hole.

[0009] For the electromagnetic coil according to some embodiments of the present application, the outer peripheral wall of the coil skeleton is provided with a vacuum coating, and the enameled wire is wound outside the vacuum coating to be insulated and spaced apart from the coil skeleton.

[0010] For the electromagnetic coil according to some embodiments of the present application, the thickness of the vacuum coating is L, satisfying: 40μm ≤ L ≤ 50μm.

[0011] For the electromagnetic coil according to some embodiments of the present application, the PCB circuit board is bonded to the coil skeleton by polyurethane glue.

[0012] The present application also proposes a solenoid valve.

[0013] For the solenoid valve according to the embodiments of the present application, it includes: a first stop iron, an armature, a valve housing, a sealing valve, and the electromagnetic coil according to any one of the above embodiments. The first stop iron is installed in the valve housing. The sealing valve and the armature are movably installed in the valve housing and are arranged axially in sequence with the first stop iron. Wherein the sealing valve has a ventilation hole penetrating axially. The armature is adapted to selectively open the first end of the ventilation hole under the action of the electromagnetic coil. The valve housing has an air inlet and an air outlet. The second end of the ventilation hole is communicated with the air outlet, and the sealing valve is used to selectively disconnect or close the air inlet and the air outlet.

[0014] For the solenoid valve according to the embodiments of the present application, the air inlet is arranged at the second end of the valve housing and opens radially outward along the valve housing. The air outlet is arranged at the second end of the valve housing and opens on the end face of the valve housing. The sealing valve is adapted to communicate the air inlet and the air outlet under the action of the gap between the sealing valve and the first stop iron and the air pressure of the air inlet.

[0015] The solenoid valve according to an embodiment of the present application further includes: a second stop iron and a reset member. The second stop iron is movably installed between the armature and the first stop iron. The reset member penetrates through the second stop iron, and both ends of the reset member are elastically connected to the armature and the first stop iron respectively.

[0016] The advantages of the solenoid valve and the above electromagnetic coil over the prior art are the same and will not be elaborated here.

[0017] Some of the additional aspects and advantages of the present application will be given in the following description, some will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a cross-sectional view of an electromagnetic coil according to an embodiment of the present application;

[0020] Figure 2 is a schematic structural diagram of an electromagnetic coil according to an embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of an electromagnetic coil according to an embodiment of the present application (from another perspective).

[0022] Figure 4 is a cross-sectional view of a solenoid valve according to an embodiment of the present application;

[0023] Figure 5 is a schematic structural diagram of a solenoid valve according to an embodiment of the present application;

[0024] REFERENCE MARKS:

[0025] Solenoid valve 100,

[0026] Electromagnetic coil 1,

[0027] Coil skeleton 11, first installation section 111, second installation section 112, first limiting convex section 113, second limiting convex section 114, installation notch 115, support plane 116, limiting plane 117, enameled wire 12, PCB circuit board 13, limiting member 14, external wire 15,

[0028] First stop iron 2, second stop iron 3, armature 4, valve housing 5, ventilation hole 51, air inlet 52, air outlet 53, sealing valve 6, reset member 7. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0030] Reference is made below Figures 1 - 3 to describe the electromagnetic coil 1 according to an embodiment of the present application. The coil skeleton 11 of the electromagnetic coil 1 has a relatively high structural strength, can withstand a relatively large pressure, can be installed in a bottle valve, and the structure of the electromagnetic coil 1 is simple, which is beneficial to reducing the number of components and facilitating installation.

[0031] As Figures 1 - 3 shown, the electromagnetic coil 1 according to an embodiment of the present application includes: a coil skeleton 11, an enameled wire 12, and a PCB circuit board 13.

[0032] Among them, the coil skeleton 11 is made of steel material. For example, the coil skeleton 11 uses a high-strength austenitic 316L series stainless steel material, and it is required that the Ni content ≥ 13%, and the yield strength ≥ 600 Mpa. Thus, the structural strength of the coil skeleton 11 can be greatly increased, the structural stability of the coil skeleton 11 can be improved, and good hydrogen embrittlement resistance and mechanical properties of the coil skeleton 11 can be ensured.

[0033] It should be noted that the coil skeleton 11, as the main structure of the electromagnetic coil 1, plays a role in installing and supporting other components of the electromagnetic coil 1. In the present application, making the coil skeleton 11 of steel material can make the overall structural strength of the electromagnetic coil 1 relatively large, so that the electromagnetic coil 1 can be installed in the bottle valve and will not undergo serious deformation under the action of the pressure in the bottle, and the structural stability is relatively good.

[0034] Secondly, making the coil skeleton 11 of steel material does not require a separate magnetic isolation component. For example, the coil skeleton 11 in the prior art is made of nylon, PBT (polybutylene terephthalate), etc., and a separate magnetic isolation tube needs to be provided. Thus, the structure of the electromagnetic coil 1 in the present application is simpler, the number of components is less, the installation steps are fewer, which is beneficial to improving the installation efficiency and reducing the overall structural size of the electromagnetic coil 1.

[0035] The enameled wire 12 is wound outside the coil skeleton 11 and is insulated and spaced apart from the coil skeleton 11. Winding the enameled wire 12 outside the coil skeleton 11 can generate a magnetic field when energized, so that the electromagnetic coil 1 can generate a magnetic force to drive the armature 4 to move. Among them, the enameled wire 12 is spaced apart from the metal layer of the coil skeleton 11, which can avoid the problem of short circuit between the enameled wire 12 and the coil skeleton 11 and improve the rationality of the structural design of the electromagnetic coil 1.

[0036] The PCB circuit board 13 is installed on the coil skeleton 11, and the PCB circuit board 13 is electrically connected to the enameled wire 12, and the PCB board is electrically connected to the external wire 15. It can be understood that the enameled wire 12 has a current input end and a current output end, and as Figure 1 and Figure 3 As shown, two external wires 15 are connected to the PCB circuit board 13, and the two external wires 15 are electrically connected to the current input end and the current output end of the enameled wire 12 through the PCB circuit board 13, so as to facilitate the current input and output of the enameled wire 12, so that the enameled wire 12 can generate an effective electromagnetic field to magnetically drive the armature 4 of the electromagnetic valve 100. In the present application, the PCB circuit board 13 is used as the lead-out method of the enameled wire 12, which can achieve high integration in an effective space, which is conducive to reducing the installation space occupied by the overall structure of the electromagnetic coil 1 and reducing the difficulty of arranging the electromagnetic valve 100.

[0037] The limiter 14 is installed on the coil frame 11 and protrudes from the outer peripheral wall of the coil frame 11. The limiter 14 can play a role in limiting and preventing errors during the installation of the electromagnetic coil 1. Therefore, it is helpful to improve the installation efficiency of the electromagnetic coil 1 when the electromagnetic coil 1 is installed in the solenoid valve 100, and can avoid relative sliding between the electromagnetic coil 1 and the body of the solenoid valve 100 after the electromagnetic coil 1 is stably installed, thereby improving the stability of the installation of the electromagnetic coil 1.

[0038] According to the electromagnetic coil 1 of the embodiment of the present application, the electromagnetic coil 1 can be installed in the bottle valve, which is beneficial to reduce the risk of failure of the bottle valve due to external collision. The electromagnetic coil 1 has a simple structure, a small number of parts, and fewer installation steps, which is beneficial to improving installation efficiency. The enameled wire 12 is connected to the external wire 15 through the PCB board, and a high degree of integration can be achieved in a limited space.

[0039] In some embodiments, Figure 2 As shown, the coil skeleton 11 includes a first mounting section 111 and a second mounting section 112, and the end of the first mounting section 111 is connected to the end of the second mounting section 112. The enameled wire 12 is wound around the first mounting section 111, and the connection between the first mounting section 111 and the second mounting section 112 has a first limiting convex section 113 protruding radially outward. Figure 2 As shown, one end of the first mounting section 111 away from the second mounting section 112 has a third limiting protrusion protruding radially outward, and the radial dimension of the third limiting protrusion is the same as the radial dimension of the first limiting protrusion 113. The enameled wire 12 is wound on the first mounting section 111 and is located between the first limiting protrusion 113 and the third limiting protrusion, so that the position of the enameled wire 12 on the coil skeleton 11 is relatively stable.

[0040] Among them, the PCB circuit board 13 is installed on the second installation section 112, and the PCB circuit board 13 and the enameled wire 12 are arranged at intervals in the axial direction of the coil bobbin 11, and the PCB circuit board 13 and the enameled wire 12 can be electrically connected through a wire harness passing through the first limiting convex section 113. In this way, the installation of the PCB circuit board 13 and the winding of the enameled wire 12 can be carried out separately, and there will be no mutual interference in the assembly process of the two.

[0041] In some embodiments, a second limiting convex section 114 protruding radially outward is provided at one end of the second installation section 112 away from the first installation section 111. An installation notch 115 is provided at one end of the second limiting convex section 114 facing the second installation section 112. The PCB circuit board 13 is located between the first limiting convex section 113 and the second limiting convex section 114, and at least part of the PCB circuit board 13 is supported in the installation notch 115.

[0042] As Figure 3 shown, the installation notch 115 has a support plane 116 and a limiting plane 117. At least part of the PCB circuit board 13 is supported on the support plane 116, so that the PCB circuit board 13 has a large contact surface with the support plane 116, so that the PCB circuit board 13 can be stably installed on the second installation section 112. And as Figure 3 shown, both ends of the PCB circuit board 13 are respectively pressed against the limiting plane 117 and the first limiting convex section 113. Thus, the PCB circuit board 13 can be prevented from shaking axially on the coil bobbin 11, and the stability of the structure of the electromagnetic coil 1 is improved.

[0043] Among them, the PCB circuit board 13 is bonded to the coil bobbin 11 through polyurethane glue. That is to say, after the PCB circuit board 13 is installed on the second installation section 112, the PCB circuit board 13 and the support plane 116 can be adhesively connected so that the two are fixedly connected. The fixing method is simple and easy to implement, which is beneficial to reducing the installation difficulty and installation cost. The external wire 15 and the PCB circuit board 13 are connected by welding, and after the external wire 15 and the PCB circuit board 13 are welded, heat-resistant tape can be used for winding for insulation protection.

[0044] In some embodiments, the limiting member 14 includes steel balls. For example, the limiting member 14 can be a 316L stainless steel limiting ball. The outer peripheral wall of the coil bobbin 11 is provided with mounting holes, and the steel balls are press-fitted into the mounting holes so that the steel balls are stably installed in the mounting holes to prevent the steel balls from automatically falling out of the mounting holes. At least part of the steel balls protrudes out of the mounting holes. In this way, when the coil bobbin 11 is fixedly connected to the valve housing 5 of the solenoid valve 100, the part of the steel balls protruding out of the mounting holes can be in limiting cooperation with the valve housing 5 to prevent the electromagnetic coil 1 from rotating in the valve housing 5, and the setting of the steel balls facilitates the quick installation of the electromagnetic coil 1 to the target position, thereby improving the installation efficiency of the electromagnetic coil 1.

[0045] That is to say, the limiting member 14 presses the stainless steel limiting balls through an interference fit dimension to prevent the coil bobbin 11 from rotating in the valve housing 5 of the solenoid valve 100 during the assembly process and avoid the occurrence of short circuits.

[0046] In some embodiments, the outer peripheral wall of the coil bobbin 11 is provided with a vacuum coating, and the enameled wire 12 is wound outside the vacuum coating to be insulated and spaced apart from the coil bobbin 11. That is to say, the inside of the coil bobbin 11 in the present application is made of steel material with relatively high structural strength, while the outer peripheral wall of the coil bobbin 11 has insulating material to prevent the enameled wire 12 from conducting current with the internal structure of the coil bobbin 11 and causing short circuits, ensuring the safe use of the electromagnetic coil 1 and enabling the insulation resistance of the solenoid valve 100 to meet the actual and regulatory requirements.

[0047] Wherein, the thickness of the vacuum coating is L, satisfying: 40μm ≤ L ≤ 50μm. For example, L is set to 43μm, or L is set to 46μm, or L is set to 48μm. Thus, when the thickness of the vacuum coating is set within the above thickness range, it can ensure that the vacuum coating can play a good insulating role for the inside of the coil bobbin 11 and the enameled wire 12, thereby ensuring that the electromagnetic coil 1 can conduct current reasonably and safely, and avoiding waste of the coating caused by too large a thickness of the vacuum coating and reducing the coating cost.

[0048] The present application also proposes a solenoid valve 100.

[0049] As Figure 4 and Figure 5 shown, the solenoid valve 100 according to the embodiment of the present application includes a first armature 2, an armature 4, a valve housing 5, a sealing valve 6, and the electromagnetic coil 1 described in any of the above embodiments.

[0050] Wherein, as Figure 4As shown in the figure, the first stop 2 is installed on the valve housing 5. The sealing valve 6 and the armature 4 are movably installed in the valve housing 5 and are arranged axially in sequence with the first stop 2. The sealing valve 6 has a vent hole 51 that penetrates axially. The armature 4 is adapted to selectively open the first end of the vent hole 51 under the action of the electromagnetic coil 1. The valve housing 5 has an air inlet 52 and an air outlet 53. The second end of the vent hole 51 is communicated with the air outlet 53, and the sealing valve 6 is used to selectively disconnect or seal the air inlet 52 and the air outlet 53.

[0051] It should be noted that when the electromagnetic coil 1 is energized to generate a magnetic field, the armature 4 moves towards the first stop 2 under the action of the magnetic field force. After moving to a certain extent, the armature 4 opens the first end of the vent hole 51 (such as Figure 5 the left end in the figure). At this time, the air flow at the air outlet 53 flows from the vent hole 51 towards the gap between the armature 4 and the first stop 2. At this time, the pressure in the gap between the armature 4 and the first stop 2 gradually changes. Since there is a pressure difference between the pressure at the air inlet 52 and the air outlet 53, the pressure in the gap between the armature 4 and the first stop 2 also has a pressure difference with the pressure at the air inlet 52. As a result, the sealing valve 6 moves towards the armature 4 under the action of this pressure difference, so that the sealing valve 6 connects the air inlet 52 and the air outlet 53, thus realizing the opening of the solenoid valve 100.

[0052] By arranging the electromagnetic coil 1 in the above-mentioned embodiment, the solenoid valve 100 in the present application can be installed in the bottle valve, and there is no risk of the bottle valve failing under external collision. Moreover, the structure of the electromagnetic coil 1 is simple, which is beneficial to reducing the number of components of the solenoid valve 100, reducing the difficulty of spatial arrangement of the solenoid valve 100, and the enameled wire 12 is connected to the external wire 15 through the PCB board, which can achieve high integration in a limited space and improve the overall performance of the solenoid valve 100.

[0053] In some embodiments, the air inlet 52 is provided at the second end of the valve housing 5 and opens radially outward along the valve housing 5. The air outlet 53 is provided at the second end of the valve housing 5 and opens on the end face of the valve housing 5. The sealing valve 6 is adapted to connect the air inlet 52 and the air outlet 53 under the action of the air pressure in the gap between the sealing valve 6 and the first stop 2 and the air inlet 52.

[0054] That is to say, as Figure 4 and Figure 5 shown, the air inlet 52 is provided on the outer peripheral wall of the right end of the valve housing 5, and there are multiple air inlets 52 which are arranged at intervals in the circumferential direction of the valve housing 5. The air outlet 53 is provided on the end face of the right end of the valve housing 5 and is open. After the armature 4 opens the vent hole 51, the sealing valve 6 moves leftward under the action of air pressure, so that the multiple air inlets 52 are simultaneously connected to the air outlet 53 in the circumferential direction, thus realizing the opening of the solenoid valve 100.

[0055] In some embodiments, the solenoid valve 100 further includes a second stop 3 and a reset member 7. The second stop 3 is movably installed between the armature 4 and the first stop 2. The reset member 7 passes through the second stop 3, and both ends of the reset member 7 are elastically connected to the armature 4 and the first stop 2 respectively.

[0056] As Figure 4 shown, the second stop 3 is located between the first stop 2 and the armature 4, and the second stop 3 can move toward the first stop 2 under the push of the armature 4. The reset member 7 can elastically reset the armature 4 to enable the armature 4 to return to the position where the vent hole 51 is closed. It can be understood that when the pressure at the air inlet 52 is the same as or the pressure difference is small compared with the pressure at the air outlet 53, the reset member 7 uses its own elastic force to push the armature 4 to the initial position.

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0058] In the description of the present application, the "first feature" and the "second feature" may include one or more of such features.

[0059] In the description of the present application, the meaning of "a plurality" is two or more.

[0060] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0061] In the description of the present application, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0062] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electromagnetic coil (1), characterized in that, Comprising: A coil bobbin (11), the coil bobbin (11) being made of steel material; An enameled wire (12), the enameled wire (12) being wound outside the coil bobbin (11) and being insulated and spaced apart from the coil bobbin (11); A PCB circuit board (13), the PCB circuit board (13) being mounted on the coil bobbin (11), and the PCB circuit board (13) being electrically connected to the enameled wire (12) and an external wire (15); A limiting member (14), the limiting member (14) being mounted on the coil bobbin (11) and protruding on the outer peripheral wall of the coil bobbin (11); The coil bobbin (11) includes a first mounting section (111) and a second mounting section (112), the enameled wire (12) being wound outside the first mounting section (111), the PCB circuit board (13) being mounted on the second mounting section (112), and a first limiting convex section (113) protruding radially outward being provided at the connection between the first mounting section (111) and the second mounting section (112); One end of the second mounting section (112) away from the first mounting section (111) is provided with a second limiting convex section (114) protruding radially outward, and an installation notch (115) is provided at one end of the second limiting convex section (114) facing the second mounting section (112). The PCB circuit board (13) is located between the first limiting convex section (113) and the second limiting convex section (114), and at least a part of the PCB circuit board (13) is supported in the installation notch (115).

2. The electromagnetic coil (1) according to claim 1, characterized in that, The limiting member (14) includes a steel ball, an installation hole is provided on the outer peripheral wall of the coil bobbin (11), and the steel ball is press-fitted into the installation hole and at least a part of the steel ball protrudes outside the installation hole.

3. The electromagnetic coil (1) according to claim 1, characterized in that, A vacuum coating is provided on the outer peripheral wall of the coil bobbin (11), and the enameled wire (12) is wound outside the vacuum coating to be insulated and spaced apart from the coil bobbin (11).

4. The electromagnetic coil (1) according to claim 3, characterized in that, The thickness of the vacuum coating is L, satisfying: 40μm ≤ L ≤ 50μm.

5. The electromagnetic coil (1) according to claim 1, characterized in that, The PCB circuit board (13) is bonded to the coil bobbin (11) by polyurethane glue.

6. A solenoid valve (100), characterized in that, Comprising: A first stop iron (2), an armature (4), a valve housing (5), a sealing valve (6), and the electromagnetic coil (1) according to any one of claims 1-5. The first stop iron (2) is mounted on the valve housing (5), and the sealing valve (6) and the armature (4) are movably mounted in the valve housing (5) and are arranged axially in sequence with the first stop iron (2); Wherein The sealing valve (6) has a ventilation hole (51) penetrating axially. The armature (4) is adapted to selectively open the first end of the ventilation hole (51) under the action of the electromagnetic coil (1). The valve housing (5) has an air inlet (52) and an air outlet (53). The second end of the ventilation hole (51) is communicated with the air outlet (53), and the sealing valve (6) is used to selectively disconnect or close the air inlet (52) and the air outlet (53).

7. The solenoid valve (100) according to claim 6, characterized in that, The intake port (52) is provided at the second end of the valve housing (5) and opens radially outward along the valve housing (5). The outlet port (53) is provided at the second end of the valve housing (5) and opens on the end face of the valve housing (5). The sealing valve (6) is adapted to connect the intake port (52) and the outlet port (53) under the action of the air pressure in the gap between the sealing valve (6) and the first stop (2) and the intake port (52).

8. The solenoid valve (100) according to claim 7, characterized in that, It further includes: a second stop (3) and a return member (7). The second stop (3) is movably installed between the armature (4) and the first stop (2). The return member (7) passes through the second stop (3), and both ends of the return member (7) are elastically connected to the armature (4) and the first stop (2) respectively.

Images