Electromagnetic valve

Abstract

An electromagnetic valve comprises a self-locking device, a movable iron core assembly, a piston assembly and an end socket, the electromagnetic valve is provided with a main valve port, the self-locking device is fixedly connected or connected with the movable iron core assembly in a limiting mode, the movable iron core assembly can slide in the axial direction of the end socket to push the piston assembly to open or close the main valve port, and a sliding part is provided with a self-locking groove. At least part of the fixing component is limited in the self-locking groove, the movable iron core assembly can slide in the axial direction of the end socket to push the piston assembly to keep the state that the main valve port is opened or closed, namely the electromagnetic valve is opened or closed, the self-locking device comprises a guide rod and a sliding component, and the sliding component is arranged on the guide rod. The guide rod and the movable iron core assembly are fixedly connected or connected in a limiting mode, the guide rod slides along the self-locking groove to push the movable iron core assembly to slide so as to achieve the self-locking effect, the structure of the self-locking device can enable the electromagnetic valve to keep the self-locking state of opening or closing in the non-continuous power-on state, and energy consumption can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle thermal management, in particular to an electromagnetic valve. BACKGROUND

[0002] With the continuous development of science and technology, the continuous improvement of production process and product structure, the application of electromagnetic valves in industry is more and more widely. The main function of electromagnetic valve is to cut off, distribute and change the flow direction of medium. The existing electromagnetic valve is generally a single stable self-control valve, which is automatically opened or closed after power on, but needs continuous power supply to maintain its open or closed state, which is not suitable for environments lacking stable mains power supply or some low power consumption and long time use. For this reason, many people have proposed technical improvement schemes for the above-mentioned electromagnetic valve, the purpose of which is to automatically lock the open or closed state of the valve after the valve is opened or closed by instantaneous power on, without the need for power supply. At present, the method of locking the working state of the valve in various schemes is basically to use spring force and magnetic force, that is, to use the locking structure of spring and permanent magnet, or permanent magnet and electromagnet, or two groups of electromagnetic components. The above structure needs a large pulse energy to switch the electromagnetic valve when the working state is converted, and the structure is complex, large in size, and still needs to consume a certain amount of power. CONTENT OF THE INVENTION

[0003] The purpose of the present application is to provide an electromagnetic valve with a self-locking device, which is beneficial to maintain the open or closed self-locking state of the electromagnetic valve without continuous power supply, and further beneficial to save energy consumption.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] An electromagnetic valve, characterized in that it comprises a self-locking device, a moving iron core assembly, a piston assembly and a head, the electromagnetic valve has a main valve port, the moving iron core assembly can push the piston assembly to close or open the main valve port, the self-locking device comprises a fixed component and a sliding component, the sliding component comprises a guide groove part, the sliding component can slide along the guide groove part relative to the axial direction of the fixed component, the fixed component abuts against the head, the sliding component is fixedly connected or limitingly connected with the moving iron core assembly, the sliding component has a self-locking groove, in the self-locking state, the moving iron core assembly can slide along the axial direction of the head to push the piston assembly to maintain the state of opening or closing the main valve port.

[0006] The technical scheme of the present application is characterized in that the fixed component and the head abut, the sliding component and the moving iron core assembly are fixedly connected or positionally connected, the sliding component comprises a guide groove part, at least part of the fixed component is limited in the guide groove part, the fixed component can slide relative to the sliding component along the guide groove part, the sliding component has a self-locking groove, in the self-locking state, at least part of the fixed component is limited in the self-locking groove, the moving iron core assembly can slide along the axial direction of the head to push the piston assembly to keep the state of opening or closing the main valve port, and the structure of the self-locking device can keep the solenoid valve in the self-locking state of opening or closing without continuous power supply, thereby saving energy consumption.

[0007] In order to achieve the above object, the present application adopts the following technical scheme:

[0008] The solenoid valve is characterized in that the solenoid valve comprises a self-locking device, a moving iron core assembly, a piston assembly and a head, the solenoid valve has a main valve port, the moving iron core assembly can push the piston assembly to close or open the main valve port, the self-locking device comprises a guide rod and a sliding component, the sliding component comprises a guide groove part, one end of the guide rod is limited in the guide groove part, the other end of the guide rod is fixedly connected or positionally connected with the moving iron core assembly, the guide rod can slide along the axial direction of the guide groove part relative to the sliding component, the sliding component has a self-locking groove, in the self-locking state, the moving iron core assembly can slide along the axial direction of the head to push the piston assembly to keep the state of opening or closing the main valve port.

[0009] The technical scheme of the present application is characterized in that the self-locking device and the moving iron core assembly are fixedly connected or positionally connected, the sliding component comprises a guide groove part, at least part of the guide rod is limited in the guide groove part, the guide rod can slide relative to the sliding component along the guide groove part, the sliding component has a self-locking groove, in the self-locking state, at least part of the guide rod is limited in the self-locking groove, the moving iron core assembly can slide along the axial direction of the static iron core to push the piston assembly to keep the state of opening or closing the main valve port, and the structure of the self-locking device can keep the solenoid valve in the self-locking state of opening or closing without continuous power supply, thereby saving energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Figure 1 is a side view structural schematic diagram of a first embodiment of a solenoid valve;

[0011] Figure 2 Figure 2 is a sectional view structural schematic diagram of the solenoid valve along the A-A plane (open valve state) in the first embodiment; Figure 1

[0012] Figure 3 is a sectional view structural schematic diagram of the solenoid valve along the A-A plane (closed valve state) in the first embodiment; Figure 3 Figure 1 Figure 4 is a sectional view structural schematic diagram of a second embodiment of a solenoid valve along the A-A plane (open valve state); and

[0013] Figure 4 Figure 5 is a sectional view structural schematic diagram of the solenoid valve along the A-A plane (closed valve state) in the second embodiment.​Figure 2 A cross-sectional view of the moving iron core assembly of the present application;

[0014] Figure 5 Figure 2 An exploded perspective view of a first embodiment of an electromagnetic valve of the present application;

[0015] Figure 6 Figure 5 A top view of a first embodiment of an electromagnetic valve of the present application;

[0016] Figure 7 Figure 6 A cross-sectional view of a first embodiment of an electromagnetic valve of the present application along the plane B-B;

[0017] Figure 8 Figure 6 A perspective view of a sliding member of a first embodiment of an electromagnetic valve of the present application;

[0018] Figure 9 Figure 6 A perspective view of a sliding member of a first embodiment of an electromagnetic valve of the present application from another angle;

[0019] Figure 10 Figure 8 A front view of a sliding member of a first embodiment of an electromagnetic valve of the present application;

[0020] Figure 11 Figure 8 A perspective view of a fixed block of a first embodiment of an electromagnetic valve of the present application;

[0021] Figure 12 Figure 11 A front view of a fixed block of a first embodiment of an electromagnetic valve of the present application;

[0022] Figure 13 A side view of a second embodiment of an electromagnetic valve of the present application;

[0023] Figure 14 Figure 13 A cross-sectional view of a first embodiment of an electromagnetic valve along the plane C-C;

[0024] Figure 15 Figure 14 A partial view of a cross-sectional view of a first embodiment of an electromagnetic valve along the plane C-C;

[0025] Figure 16 Figure 14 A cross-sectional view of a first embodiment of an electromagnetic valve along the plane D-D;

[0026] Figure 17 Figure 16 ​​​​​​​​​​​​Fig. 2 is a partial schematic view of a sectional structure along the D-D plane of one of the electromagnetic valves;

[0027] Figure 18 Fig. 1 is a schematic view of a sectional structure along the D-D plane of one of the electromagnetic valves; Figure 17 Fig. 2 is a partial schematic view of a sectional structure along the D-D plane of one of the electromagnetic valves;

[0028] Figure 19 Fig. 1 is a schematic view of a sectional structure along the D-D plane of one of the electromagnetic valves; Figure 18 Fig. 2 is a partial schematic view of a sectional structure along the D-D plane of one of the electromagnetic valves;

[0029] Reference signs:

[0030] 1, self-locking device; 11, fixed part; 11', fixed part; 111, guide rod; 111', guide rod; 112, fixed block; 112a, second abutting surface; 113, first groove part; 114, second groove part; 115, first protruding part; 115a, second end surface; 116, second protruding part; 117, first abutting part; 118, second abutting part; 119, bent part; 12, sliding part; 12', sliding part; 121, guide groove part; 122, first accommodating part; 123, first part; 124, second part; 125, third part; 126, fourth part; 127, first protruding part; 128, self-locking groove; 129, first guide rail part; 129a, first end surface; 130, second guide rail part; 131, first limiting part; 132, second limiting part; 133, first boss part; 134, second boss part; 135, stop block; 13, first elastic member; 2, moving iron core assembly; 21, second accommodating part; 22, moving iron core; 221, through hole; 222, first large-diameter part; 223, first small-diameter part; 23, pressing block; 24, valve rod; 25, second elastic member; 3, piston assembly; 4, static iron core; 5, sleeve; 6, end cover; 61, first abutting surface; 62, third accommodating part; 7, main valve port; 8, valve cavity; 9, piston spring; 91, third elastic member; 10, valve body; 101, inlet cavity; 102, outlet cavity. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments are further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0032] The electromagnetic valve is applied to the air conditioning or heat pump system of a new energy vehicle, is suitable for a refrigerant valve in a traditional refrigerant and environmentally friendly refrigerant vehicle heat management system, and is commonly used as a switching element in a vehicle heat management system.

[0033] In the present application, as Figures 1-19As shown, the solenoid valve includes a self-locking device 1, a moving iron core assembly 2, a piston assembly 3, a stationary iron core 4, and a valve body 10. The valve body 10 includes an inlet chamber 101, an outlet chamber 102, a main valve port 7, and a valve cavity 8. The inlet chamber 101 is connected to the valve cavity 8, and the valve cavity 8 can be connected to the outlet chamber 102 through the main valve port 7. The connection between the valve cavity 8 and the outlet chamber 102 is the main valve port 7. When fluid flows into the valve cavity 8 from the inlet chamber 101, it can flow into the outlet chamber 102 through the main valve port 7. The piston assembly 3 is located in the valve cavity 8, and part of the moving iron core... The core assembly 2 can penetrate the stationary iron core 4 and contact the piston assembly 3. The main valve port 7 is away from the stationary iron core 4 relative to the piston assembly 3. The moving iron core assembly 2 can slide along the axial direction of the stationary iron core 4 to push the piston assembly 3 to open or close the main valve port 7. When the piston assembly 3 closes the main valve port 7, the channel between the inlet chamber 101 and the outlet chamber 102 is cut off, and the liquid cannot flow between them. When the piston assembly 3 opens the main valve port 7, the channel between the inlet chamber 101 and the outlet chamber 102 is connected, and the fluid can flow between them. The self-locking device 1 is fixedly connected or limited to the moving iron core assembly 2. The specific connection method can be welding or other methods. The cooperation between the self-locking device 1 and the moving iron core assembly 2 can maintain the state of pushing the piston assembly 3 to open or close the main valve port 7.

[0034] Such as 2 and Figure 14 As shown, the solenoid valve also includes a piston spring 9, which is located in the valve chamber 8. One end of the piston spring 9 abuts against the piston assembly 3, and the other end abuts against the bottom wall forming the valve chamber 8. The piston spring 9 is designed to provide a reset force for the piston assembly 3 when the solenoid valve is opened, that is, when the piston assembly 3 opens the main valve port 7, which helps to make the operation of the solenoid valve more stable.

[0035] like Figures 4-5As shown, the moving iron core assembly 2 also includes a moving iron core 22, a pressure block 23, a valve stem 24, and a second elastic member 25. The moving iron core 22 can abut against the stationary iron core 4. Part of the valve stem 24 is away from the pressure block 23 relative to the second elastic member 25. The second elastic member 25 is spaced apart from the moving iron core 22. The pressure block 23 is used to movably fix the second elastic member 25 and the valve stem 24 onto the moving iron core 22. The pressure block 23 is fixedly connected or limited to the moving iron core 22. Specifically, the connection method can be an interference fit or other methods. The moving iron core 22 has a second receiving portion 21. The pressure block 23 is embedded in the second receiving portion 21. One end of the pressure block 23 abuts against the bottom wall forming the second receiving portion 21. One end of the second elastic member 25 abuts against the pressure block, and the other end... The valve stem 24 is abutted against the head of the valve stem 24 or the limiting part shown in the figure. At this point, the valve stem 24 is fixedly and movably connected to the moving iron core 22. The second elastic element 25 can be compressed and moved in the axial direction relative to the stationary iron core 4. The solenoid valve also includes a third elastic element 91. One end of the third elastic element 91 abuts against the stationary iron core 4, and the other end abuts against the moving iron core 22. The valve stem 24 can pass through the stationary iron core 4 and the third elastic element 91 to contact the piston assembly 3. Then, the valve stem 24 can slide along the axial direction of the moving iron core 22 to push the piston assembly 3 to close or open the main valve port 7. The elastic cooperation between the second elastic element 25 and the third elastic element 91 ensures that the action of the self-locking device 1 will not affect the state of the piston assembly 3 closing or opening the main valve port 7.

[0036] Furthermore, such as Figure 4 As shown, the moving iron core 22 has a through hole 221, which connects to the second receiving portion 21. The through hole 221 includes a first large diameter portion 222 and a first small diameter portion 223. The first small diameter portion 223 is far away from the second receiving portion 21 relative to the first large diameter portion 222. The second elastic member 25 is embedded in the first large diameter portion 222, which restricts the range of motion of the second elastic member 25. The second elastic member 25 is in clearance fit with the first large diameter portion 222. One end of the second elastic member 25 abuts against the pressure block 23, and the other end abuts against the valve stem 24. The mutual cooperation between the second elastic member 25, the valve stem 24, and the pressure block 23 is beneficial to allow the valve stem 24 to slide along the axial direction of the moving iron core 22 when the self-locking device 1 is activated, so as to maintain the state of pushing the piston assembly 3 to close or open the main valve port 7.

[0037] In the first embodiment of this application, combined with Figures 5-12As shown, the self-locking device 1 includes a fixed component 11 and a sliding component 12. The sliding component 12 has a first receiving portion 122, and the fixed component 11 is located in the first receiving portion 122. The sliding component 12 includes a guide groove portion 121, and at least a portion of the fixed component 11 is confined within the guide groove portion 121. Under the action of an external force, the sliding component 12 can slide relative to the fixed component 11 along the guide groove portion 121. The sliding component 12 has a self-locking groove 128. In the self-locking state, at least a portion of the fixed component 11 is confined within the self-locking groove 128. The self-locking device 1 of this application has a relatively simple structure and fewer machined parts, which saves costs to a certain extent. Furthermore, in the self-locking state, at least a portion of the fixed component 11 is confined within the self-locking groove 128, making the self-locking state more stable. This self-locking device 1 can be applied not only to on / off solenoid valves but also to reversing solenoid valves.

[0038] The fixing component 11 includes a guide rod 111 and a fixing block 112. The guide rod 111 and the fixing block 112 abut against each other. At least part of the guide rod 111 is located between the sliding component 12 and the fixing block 112. That is, there is space between the fixing block 112 and the part of the sliding component 12 to accommodate the rotation of the guide rod 111, so that the guide rod 111 can rotate relative to the fixing block 112. This structure ensures that while the guide rod 111 slides along the guide groove 121 of the sliding component 12, the fixing block 112 can also slide along the axial direction of the sliding component 12, and there will be no jamming.

[0039] The guide rod 111 has a Z-shaped structure, with its two ends bent perpendicularly in opposite directions. One end is connected to the fixed block 112 for limiting, and the other end abuts against the sliding component 12. The guide rod 111 can rotate relative to the fixed block 112. The guide rod 111 includes a first abutting part 117 and a second abutting part 118. The first abutting part 117 abuts against the guide groove part 121, and the second abutting part 118 abuts against the arc surface of the fixed block 112. The second abutting part 118 slides against the fixed block 112 on the arc surface, increasing the contact area and making the guide rod 111 more stable when rotating relative to the fixed block 112. Of course, in other embodiments, the shape of the guide rod 111 is not limited to this shape and can also be other shapes. At the same time, the guide rod 111 has a second boss part 134, which protrudes towards the stationary iron core 4 and is located on one side of the second abutting part 118.

[0040] like Figures 7-12As shown, the fixing block 112 has a first groove 113 and a second groove 114. The second groove 114 communicates with the channel of the first groove 113. The radial direction of the second groove 114 is perpendicular to the axial direction of the sliding member 12, and the radial direction of the first groove 113 is perpendicular to the axial direction of the sliding member 12. The first groove 113 is away from the main valve port 7 of the solenoid valve relative to the second groove 114. One end of the guide rod 111 is embedded in the first groove 113. Part of the second abutment portion 118 abuts against the arc of the wall of the first groove 113. The arc surfaces abut against each other. At the same time, the second boss portion 134 is embedded in the second groove 114. This can limit the rotation angle of the guide rod 111 relative to the fixing block 112, making the rotational engagement more stable.

[0041] The fixing block 112 includes a first protrusion 115 and a second protrusion 116. Relative to the radial direction of the sliding member 12, the first protrusion 115 is farther away from the first groove 113 than the second protrusion 116. The second protrusion 116 has a clearance fit with a wall portion forming the first receiving portion 122. The sliding member 12 includes a first guide rail portion 129 and a second guide rail portion 130. The first guide rail portion 129 is farther away from the fixing member 11 than the second guide rail portion 130. The first protrusion 115 is limited to the first guide rail portion 129, and the second protrusion 116 is limited to the second guide rail portion 130. The first protrusion 115 can slide with the first guide rail portion 129, and the second protrusion 116 and the second guide rail portion 130 can slide together. When the fixing block 112 remains stationary, the sliding member 12 can slide relative to the fixing block 112 along the axial direction of the stationary iron core 4. The fit between the protrusion and the guide rail portion further stabilizes the relative sliding between the sliding member 12 and the fixing block 112. Figure 11 As shown, a first protrusion 115 and a second protrusion 116 are provided on the fixing block 112. In actual implementation, the position and number of protrusions can be determined as needed.

[0042] The first guide rail portion 129 has a first end face 129a, which is located at the top of the first guide rail portion 129 relative to the axial direction of the sliding member 12. The first protrusion 115 has a second end face 115a. When the fixing block 112 is assembled with the sliding member 12, the first end face 129a can contact the second end face 115a. At the same time, this also limits the sliding distance of the fixing block 112 relative to the sliding member 12 along the axial direction of the sliding member 12, which facilitates the assembly of the fixing member 11, the sliding member 12 and the first elastic member 13, simplifies the installation process and saves assembly costs to a certain extent.

[0043] like Figure 7As shown, the self-locking device 1 also includes a first elastic element 13, which is elastic. In this design, the first elastic element 13 is specifically a spring. The first elastic element 13 is located in the first receiving portion 122, and a portion of the first elastic element 13 is embedded in the second groove portion 114. One end of the first elastic element 13 abuts against the sliding member 12, and the other end abuts against the second protrusion portion of the guide rod. When the fixed member 11 remains stationary, the sliding member 12 can move a certain distance in the pushing action of the first elastic element 13. The sliding member 12 has a self-locking groove 128. In the self-locking state, at least a portion of the fixed member 11 is limited to the self-locking groove 128. The first elastic element 13 can push the sliding member 12 to slide along the axial direction of the sliding member 12 to maintain the current state of the solenoid valve. This self-locking device, which uses the fixed member 11 and the self-locking groove 128 to cooperate, is not only simple in structure and easy to assemble, but also reduces energy consumption to a certain extent.

[0044] The sliding component 12 has a first protrusion 133 located in the first receiving portion 122. The first protrusion 133 protrudes towards the fixing block 112. One end of the first elastic member 13 is sleeved on the first protrusion 133, that is, one end of the first elastic member 13 sleeves the first protrusion 133 and the first protrusion 133 is placed in the first elastic member 13. The other end is sleeved on the second protrusion 134, that is, the other end sleeves the second protrusion 134 and the second protrusion 134 is placed in the first elastic member 13. The fixing component 11 and the sliding component 12 can move relative to each other through the first elastic member 13. The arrangement of the first protrusion 133 and the second protrusion 134 helps to limit the range of motion of the first elastic member 13, prevent the position of the first elastic member 13 from shifting during use, and prevent it from providing a pushing force to the sliding component 12. It also limits the direction of movement of the guide rod 111, which further helps to ensure the stability of the sliding between the fixing component 11 and the sliding component 12. Of course, in other embodiments, the first protrusion 133 and the second protrusion 134 can also be recesses. The first elastic member 13 can also be embedded in the recess of the first protrusion 133 at one end and in the recess of the second protrusion 134 at the other end. Such a combination can also limit the range of motion of the first elastic member 13.

[0045] like Figures 8-10As shown, in this application, the sliding member 12 includes a guide groove 121, and at least a portion of the fixing member 11 is limited to the guide groove 121. The guide groove 121 has a first part 123, a second part 124, a third part 125, a fourth part 126, and a first protrusion 127. The first protrusion 127 is similar to a "heart" shape. The first part 123, the second part 124, the third part 125, and the fourth part 126 are arranged sequentially around the first protrusion 127. The top height of the first protrusion 127 is greater than the top height of the second part 124, the top height of the first part 123 is greater than the top height of the second part 124, the top height of the second part 124 is greater than the top height of the third part 125, the top height of the third part 125 is greater than the bottom height of the fourth part 126, and the bottom height of the fourth part 126 is greater than the bottom height of the first part 123. The fixing member 11 has a first abutting part 117, which abuts against the guide groove 121. The height difference between the first part 123, the second part 124, the third part 125, and the fourth part 126 prevents the fixed part 11 from rotating in reverse, ensuring that the fixed part 11 can only rotate in one direction. This helps to ensure a more stable fit between the fixed part 11 and the sliding part 12. At the same time, it should be noted that the height difference between the first part 123, the second part 124, the third part 125, and the fourth part 126 should be greater than the fillet radius of the guide rod 111 of the fixed part 11, further ensuring that the fixed part 11 rotates in one direction.

[0046] To ensure that the fixed component 11 does not get stuck during sliding along the guide groove 121, the width of the guide groove 121 is larger than the size of the first abutment portion 117 of the guide rod 111. A gentle slope transition is used between the bottom and top of the first part 123 and between the bottom and top of the fourth part 126. This design facilitates smoother sliding contact between the fixed component 11 and the sliding component 12, reducing the likelihood of jamming. In the transition from the bottom to the top of the fourth part 126, its sidewalls are rounded, further ensuring smoother sliding contact between the fixed component 11 and the sliding component 12, resulting in more stable operation.

[0047] like Figure 9 and Figure 10As shown, the self-locking groove 128 is located in the recess of the wall forming the first protrusion 127, that is, in the groove of the imitation "heart" structure. The self-locking groove 128 is far away from the fourth part 126 relative to the first part 123. The self-locking groove 128 includes a first limiting part 131 and a second limiting part 132. The first limiting part 131 is connected to the side end face of the first part 123 facing the second part 124. The first limiting part 131 and the second limiting part 132 are set at an angle Φ, and the angle Φ is less than 180 degrees. This angle setting is beneficial to provide guidance when the fixed part 11 slides. When the power is off, it is beneficial for the fixed part 11 to slide down along the end face of the first part facing the second part 124 to the self-locking groove 128, so that the fixed part 11 can be engaged with the self-locking groove 128, further preventing the phenomenon of the sliding part 12 reversing. This ensures that the solenoid valve can remain open or closed when the power is off, which saves energy to a certain extent.

[0048] like Figure 2 As shown, the solenoid valve also includes a head 6 and a sleeve 5. The head 6 and the sleeve 5 are fixedly connected or limitedly connected. The specific connection method can be interference fit snap-fit, welding, etc. The moving iron core assembly 2 and the stationary iron core 4 are located in the inner cavity of the sleeve 5. The moving iron core assembly 2 can slide along the inner wall of the sleeve 5 relative to the axial direction of the stationary iron core 4. The head 6 is away from the stationary iron core 4 relative to the moving iron core assembly 2.

[0049] The end cap 6 includes a first abutment surface 61, which is located within the inner cavity of the sleeve 5, such as... Figure 3 As shown, the fixing block 112 includes a second abutting surface 112a. In the axial direction of the stationary iron core 4, the second abutting surface 112a is away from the second groove 114 relative to the first groove 113. During the opening or closing of the solenoid valve, the first abutting surface 61 of the end cap 6 and the second abutting surface 112a of the fixing block 112 are always in contact. Under the action of external force, the sliding component 12 can slide relative to the fixing block 112 along the axial direction of the stationary iron core 4.

[0050] The other solenoid valve protected in this application differs from the previous solenoid valve in that it combines... Figures 13-19As shown, the self-locking device 1 includes a sliding component 12' and a guide rod 111'. The sliding component 12' includes a guide groove 121, and at least a portion of the guide rod 111' is confined within the guide groove 121. Under the action of an external force, a portion of the guide rod 111' can slide relative to the sliding component 12' along the guide groove 121. The sliding component 12' has a self-locking groove 128. In the self-locking state, at least a portion of the guide rod 111' is confined within the self-locking groove 128. The self-locking device 1 of this application achieves the self-locking function by setting the self-locking groove 128 and the guide rod 111'. The structure of the self-locking device 1 is relatively simple, and it has fewer machined parts, which saves costs to a certain extent. Furthermore, in the self-locking state, at least a portion of the guide rod 111' is confined within the self-locking groove 128, making the self-locking state more stable. This self-locking device 1 can be applied not only to on / off solenoid valves but also to directional solenoid valves.

[0051] One end of the guide rod 111' abuts against the guide groove 121, and the other end is fixedly connected or limited to the pressure block 23. Specifically, the connection method can be welding, etc. The guide rod 111' can slide along the axial direction of the guide groove 121 relative to the sliding member 12'. Furthermore, the guide rod 111' includes a first abutting part 117, which always abuts against the guide groove 121. This is beneficial for the guide rod 111' to slide along the guide groove 121 without disengaging from the guide groove 121, which further benefits the stable operation of the self-locking device 1.

[0052] like Figures 17-19As shown, the sliding member 12' includes a guide groove portion 121, at least a portion of the guide rod 111' is limited in the guide groove portion 121. The guide groove portion 121 has a first portion 123, a second portion 124, a third portion 125, a fourth portion 126 and a first protrusion 127. The first protrusion 127 is similar to a "heart" shape. The first portion 123, the second portion 124, the third portion 125 and the fourth portion 126 are arranged sequentially around the first protrusion 127. The top height of the first protrusion 127 is greater than the top height of the second portion 124, the top height of the first portion 123 is greater than the top height of the second portion 124, the top height of the second portion 124 is greater than the top height of the third portion 125, the top height of the third portion 125 is greater than the bottom height of the fourth portion 126, and the bottom height of the fourth portion 126 is greater than the bottom height of the first portion 123. The fixing member 11' has a first abutting portion 117, which abuts against the guide groove portion 121. The height difference between the first part 123, the second part 124, the third part 125, and the fourth part 126 prevents the fixed part 11' from rotating in the opposite direction, ensuring that the fixed part 11' can only rotate in one direction. This helps to ensure a more stable fit between the guide rod 111' and the sliding part 12'. At the same time, it should be noted that the height difference between the first part 123, the second part 124, the third part 125, and the fourth part 126 should be greater than the radius of the guide rod 111', further ensuring that the guide rod 111' rotates in one direction.

[0053] To ensure that the guide rod 111' does not get stuck while sliding along the guide groove 121, the width of the guide groove 121 is larger than the size of the first abutment portion 117 of the guide rod 111. A gentle slope transition is used between the bottom and top of the first part 123 and the bottom and top of the fourth part 126. This design helps the guide rod 111' and the sliding component 12' to slide more smoothly, thereby reducing the occurrence of jamming. In the transition from the bottom to the top of the fourth part 126, its sidewall is rounded. This method further ensures the sliding contact between the guide rod 111' and the sliding component 12', making the sliding smoother and the operation more stable.

[0054] like Figure 19As shown, the self-locking groove 128 is located in the recess of the wall forming the first protrusion 127, that is, in the groove of the imitation "heart" structure. The self-locking groove 128 is far away from the fourth part 126 relative to the first part 123. The self-locking groove 128 includes a first limiting part 131 and a second limiting part 132. The first limiting part 131 is connected to the side of the first part 123 facing the end face of the second part 124. The first limiting part 131 and the second limiting part 132 are set at an angle Φ, and the angle Φ is less than 180 degrees. This angle setting is beneficial to provide guidance when the guide rod 111' slides. When the power is off, it is beneficial for the guide rod 111' to slide down along the end face of the first part 123 facing the second part 124 to the self-locking groove, so that the guide rod 111' can be engaged with the self-locking groove 128, further preventing the phenomenon of the guide rod 111' reversing. This ensures that the solenoid valve can remain open or closed when the power is off, saving energy to a certain extent.

[0055] The self-locking device 1 also includes a stop 135, which is disposed opposite to the sliding member 12'. That is, assuming there is a reference plane between the stop 135 and the sliding member 12', the parallel projection of the stop 135 on the reference plane at least partially coincides with the parallel projection of the sliding member 12' on the reference plane. The guide rod 111' can move between the stop 135 and the sliding member 12'. The arrangement of the stop 135, to a certain extent, prevents the guide rod 111' from disengaging from the guide groove 121 due to excessive movement angle, further contributing to the stability of the solenoid valve's operating state. Figure 17 As shown, the guide rod 111' includes a bent portion 119, which can slide between the stop block 135 and the sliding component 12. Since one end of the guide rod 111' abuts against the guide groove 121 and the other end is fixedly connected or limited to the moving iron core assembly 2, the specific connection method can be welding or other methods. When one end of the guide rod 111' moves along the guide groove 121, the other end synchronously drives the moving iron core assembly 2 to move along the axial direction of the sliding component 12'. At this time, the setting of the bent portion 119 can reduce the radial rotation amplitude of the guide rod 111' relative to the sliding component 12', which is beneficial to reduce the connection wear between the guide rod 111' and the moving iron core assembly 2, and further beneficial to increase the service life between the guide rod 111' and the moving iron core assembly 2.

[0056] like Figure 14 As shown, the solenoid valve also includes a head 6 and a sleeve 5. The head 6 and the sleeve 5 are fixedly connected or limitedly connected. The specific connection method can be interference fit snap-fit, welding, etc. The moving iron core assembly 2 and the stationary iron core 4 are located in the inner cavity of the sleeve 5. The moving iron core assembly 2 can slide along the inner wall of the sleeve 5 relative to the axial direction of the stationary iron core 4. The head 6 is away from the stationary iron core 4 relative to the moving iron core assembly 2. The head 6 includes a third receiving part 62. The sliding part 12' and the stop 135 are respectively embedded in the third receiving part 62. The specific connection method can be interference fit snap-fit, etc.

[0057] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications without departing from the concept of this application, and these modifications all fall within the protection scope of this application.

[0058] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the application itself. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of this application.

Claims

1. A solenoid valve, characterized in that, The device includes a self-locking device (1), a moving iron core assembly (2), a piston assembly (3), and a head (6). The solenoid valve has a main valve port (7). The moving iron core assembly (2) can push the piston assembly (3) to close or open the main valve port (7). The self-locking device (1) includes a fixed part (11) and a sliding part (12). The sliding part (12) includes a guide groove (121). The sliding part (12) can slide along the guide groove (121) relative to the fixed part (11) in the axial direction. The fixed part (11) abuts against the head (6). The sliding part (12) is fixedly connected or limitedly connected to the moving iron core assembly (2). The sliding part (12) has a self-locking groove (128). In the self-locking state, the moving iron core assembly (2) can slide along the axial direction of the head (6) to push the piston assembly (3) to keep the main valve port (7) open or closed.

2. The solenoid valve according to claim 1, characterized in that, The solenoid valve includes a stationary iron core (4), and the moving iron core assembly (2) includes a moving iron core (22) and a pressure block (23). The moving iron core assembly (2) has a second receiving portion (21), the pressure block (23) is located in the second receiving portion (21), and the sliding member (12) is located in the second receiving portion (21). The sliding member (12) is fixedly connected or limitedly connected to the pressure block (23). The moving iron core (22) can abut against the stationary iron core (4), and the sliding member (12) can push the moving iron core (22) to slide along the axial direction of the stationary iron core (4).

3. The solenoid valve according to claim 2, characterized in that, The moving iron core assembly (2) further includes a valve stem (24) and a second elastic element (25). Part of the valve stem (24) is away from the pressure block (23) relative to the second elastic element (25). The second elastic element (25) is spaced apart from the moving iron core (22). One end of the second elastic element (25) abuts against the pressure block (23), and the other end abuts against the valve stem (24). The valve stem (24) slides along the axial direction of the moving iron core (22) to push the piston assembly (3) to close or open the main valve port (7).

4. The solenoid valve according to any one of claims 1-3, characterized in that, The self-locking device includes a first elastic element (13), and the sliding member (12) has a first receiving portion (122). The first elastic element (13) is located in the first receiving portion (122). One end of the first elastic element (13) abuts against the fixed member (11), and the other end of the first elastic element (13) abuts against the sliding member (12). The sliding member (12) and the fixed member (11) can move relative to each other through the first elastic element (13). The sliding member (12) can push the moving iron core (22) to slide.

5. The solenoid valve according to claim 4, characterized in that, The fixing component (11) includes a guide rod (111) and a fixing block (112). One end of the guide rod (111) is limitedly connected to the fixing block (112), and the other end abuts against the sliding component (12). The guide rod (111) can rotate relative to the fixing block (112).

6. The solenoid valve according to claim 5, characterized in that, The sliding component (12) has a first boss (133) located in the first receiving portion (122). The first boss (133) protrudes toward the fixing block (112). The guide rod (111) has a second boss (134) protruding toward the first elastic member (13). One end of the first elastic member (13) is sleeved on the first boss (133), and the other end is sleeved on the second boss (134). The sliding component (12) and the fixing component (11) can move relative to each other through the first elastic member (13).

7. The solenoid valve according to claim 6, characterized in that, The guide groove (121) includes a first part (123), a second part (124), a third part (125), a fourth part (126), and a first protrusion (127). The first part (123), the second part (124), the third part (125), and the fourth part (126) are arranged sequentially around the first protrusion (127). The top height of the first protrusion (127) is greater than the top height of the first part (123). The top height of the second part (124) is greater than the top height of the third part (125), the top height of the third part (125) is greater than the bottom height of the fourth part (126), the top height of the fourth part (126) is greater than the bottom height of the first part (123), and the guide rod (111) of the sliding member has a first abutting part (117), which is capable of sliding along the guide groove (121).

8. The solenoid valve according to claim 7, characterized in that, The self-locking groove (128) is located in the recess of the wall forming the first protrusion (127). The self-locking groove (128) includes a first limiting part (131) and a second limiting part (132). The first limiting part (131) is connected to the side end face of the first part (123) facing the second part (124). The first limiting part (131) and the second limiting part (132) are set at an angle Φ, and the angle Φ is less than 180 degrees. The fixing member (11) can be engaged with the self-locking groove (128).

9. A solenoid valve, characterized in that, The device includes a self-locking device (1), a moving iron core assembly (2), a piston assembly (3), and a head (6). The solenoid valve has a main valve port (7). The moving iron core assembly (2) can push the piston assembly (3) to close or open the main valve port (7). The self-locking device (1) includes a guide rod (111') and a sliding component (12'). The sliding component (12') includes a guide groove (121). One end of the guide rod (111') is limited to the guide groove (121), and the other end is fixedly connected or limited to the moving iron core assembly (2). The guide rod (111') can slide along the guide groove (121) relative to the sliding component (12') axially. The sliding component (12') has a self-locking groove (128). In the self-locking state, the moving iron core assembly (2) can slide along the head (6) axially to push the piston assembly (3) to keep the main valve port (7) open or closed.

10. The solenoid valve according to claim 9, characterized in that, The self-locking device (1) further includes a stop (135), which is disposed opposite to the sliding member (12'), with a gap between the stop (135) and the sliding member (12'). The guide rod (111') includes a bent portion (119), which is capable of sliding between the stop (135) and the sliding member (12').

11. The solenoid valve according to claim 10, characterized in that, The solenoid valve also includes a stationary iron core (4), and the moving iron core assembly (2) includes a moving iron core (22) and a pressure block (23). The moving iron core assembly (2) has a second receiving portion (21), and the pressure block (23) is located in the second receiving portion (21). The guide rod (111') is fixedly connected or limitedly connected to the pressure block (23), and the guide rod (111') can push the moving iron core (22) to slide along the axial direction of the stationary iron core (4).

12. The solenoid valve according to claim 11, characterized in that, The moving iron core assembly (2) includes a valve stem (24) and a second elastic member (25). Part of the valve stem (24) is away from the pressure block (23) relative to the second elastic member (25). The second elastic member (25) is spaced apart from the moving iron core (22). One end of the second elastic member (25) abuts against the pressure block (23), and the other end abuts against the valve stem (24). The valve stem (24) can slide along the axial direction of the moving iron core (22) to push the piston assembly (3) to close or open the main valve port (7).

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