solenoid valve

Abstract

The present application provides a solenoid valve including a valve seat having a valve chamber and a valve port that communicate with each other, a valve sleeve having one end connected to the valve seat and a chamber communicating with an opening at one end away from the valve port of the valve chamber, a spindle that is movably inserted into the valve chamber to seal or open the valve port, and a movable iron core that is movably provided in the chamber of the valve sleeve and has one end fixedly engaged with one end of the spindle. The technical aspects provided by the present application can solve the problem that the movable iron core in the prior art is connected to the spindle, which has a low degree of freedom and a risk of being stuck.

Description

[Technical Field]

[0001] This application claims priority to the patent application filed with the State Intellectual Property Office of the People's Republic of China on September 10, 2021, bearing application number 202111063216.9 and entitled "Solenoid Valve", the patent application filed with the State Intellectual Property Office of the People's Republic of China on September 10, 2021, bearing application number 202122199452.5 and entitled "Solenoid Valve", the patent application filed with the State Intellectual Property Office of the People's Republic of China on September 10, 2021, bearing application number 202122200286.6 and entitled "Solenoid Valve", and the patent application filed with the State Intellectual Property Office of the People's Republic of China on September 10, 2021, bearing application number 202111064558.2 and entitled "Solenoid Valve".

[0002] FIELD OF THE INVENTION This application relates to the technical field of solenoid valves, and more particularly to solenoid valves. [Background technology]

[0003] In conventional solenoid valves, a spindle and a movable iron core are connected by caulking or the like, and the movement of the movable iron core moves the spindle, thereby opening and closing the valve port.

[0004] Because the spindle and the movable iron core are connected, the installation of the entire structure is inconvenient, and additional processing must be performed at the connection point to ensure the stability and reliability of the connection. Furthermore, because the movable iron core moves with the spindle, the movable iron core has a low degree of freedom of movement and there is a risk of it getting stuck, which is disadvantageous for the use of the solenoid valve. Summary of the Invention

[0005] The present application provides a solenoid valve for solving the problem in the prior art that the movable iron core in the solenoid valve has a low degree of freedom and there is a risk of it becoming stuck.

[0006] In order to solve the above problems, the present application provides a solenoid valve including a valve seat portion having a valve chamber and a valve port which communicate with each other, a valve sleeve having one end connected to the valve seat portion and a chamber which communicates with an opening at one end remote from the valve port of the valve chamber, a spindle which is movably inserted into the valve chamber so as to seal or open the valve port, and a movable iron core which is movably provided within the chamber of the valve sleeve and has one end fastened and engaged with one end of the spindle.

[0007] Furthermore, the spindle includes a guide head, a rod, and a sealing head connected in order, the radial dimension of the rod is smaller than the radial dimensions of the guide head and the sealing head, the outer wall of the guide head is restrictively engaged with the inner wall of the valve chamber, the guide head is stop-engaged with one end of the movable iron core, and the sealing head is used to seal or open the valve port.

[0008] Furthermore, the valve seat has a limiting surface therein, and the solenoid valve further includes a first elastic member, the first elastic member is fitted to the rod, one end of the first elastic member abuts against the guide head, and the other end of the first elastic member abuts against the limiting surface, and when the valve port is open, the sealing head is located outside the valve seat.

[0009] Furthermore, the first elastic member is a spring, and the gap between the inner wall of the first elastic member and the outer wall of the rod is greater than 0.3 mm.

[0010] The valve seat further includes a main body structure, an inner limiting ring, and an annular sealing ring. The main body structure has a valve chamber and a valve port. An outer wall of the main body structure has an annular sealing groove. The annular sealing ring is located in the annular sealing groove. The inner limiting ring is provided on the inner wall of the valve chamber and forms a limiting surface facing the surface of the first elastic member. When the valve port is closed, the sealing head abuts against the inner limiting ring.

[0011] Furthermore, the solenoid valve further includes a first sealing ring, and the outer wall of the sealing head has a first sealing groove, and the first sealing ring is disposed in the first sealing groove.

[0012] Furthermore, the valve seat further has a flow hole communicating with the valve chamber, the outer wall of the guide head has a second sealing groove, the solenoid valve further includes a second sealing ring, the second sealing ring is disposed in the second sealing groove, and the flow hole is located between the guide head and the valve port.

[0013] Furthermore, the guide head has a first tapered surface, the first tapered surface being located on a side of the guide head away from the rod, and the sealing head has a second tapered surface and a third tapered surface, the second tapered surface being located on a side of the sealing head facing the rod, and the third tapered surface being located on a side of the sealing head away from the rod, where the taper angle of the second tapered surface is A, and 110°≦A≦170°.

[0014] The solenoid valve further includes a suction element, which is disposed in the valve sleeve and located on the side of the movable core away from the valve seat. One end of the movable core facing the valve port is provided with a positioning groove, and one end of the spindle is fastened and engaged with the bottom wall of the positioning groove. The valve seat further includes a guide surface and a first stop surface, the inner wall of the positioning groove is restrainedly engaged with the guide surface, and the bottom wall of the positioning groove is fastened and engaged with the first stop surface.

[0015] Furthermore, the solenoid valve further includes a second elastic member, both ends of which abut against the attractor and the movable iron core, respectively; the solenoid valve further includes a first elastic member, which is fitted to the spindle, and the elastic force of the second elastic member is greater than the elastic force of the first elastic member.

[0016] Furthermore, the valve seat portion has a first mounting hole, one end of the valve sleeve penetrates the first mounting hole, the opening of the valve chamber facing the armature communicates with the first mounting hole, the communicating gap within the chamber of the valve sleeve is a core chamber, the core chamber includes an upper chamber and a lower chamber communicating with each other, the upper chamber is defined by the space between the armature and the attractor, and the lower chamber is defined by the space between the bottom wall of the first mounting hole and the armature, and the solenoid valve further includes a balancing passage, which connects the upper chamber and / or the lower chamber with the space outside the solenoid valve.

[0017] Furthermore, the balancing passage includes a first balancing passage, the first balancing passage being provided in the side wall of the valve sleeve, one end of the first balancing passage communicating with the upper chamber, and the other end of the first balancing passage communicating with the space outside the solenoid valve.

[0018] Furthermore, the balancing passage includes a second balancing passage, which is a through hole that passes through the suction element, one end of the second balancing passage communicating with the upper chamber, and the other end of the second balancing passage communicating with the space outside the solenoid valve.

[0019] Furthermore, the balancing passage includes a third balancing passage, the periphery of the suction element is welded to the valve sleeve, the non-welded area between the suction element and the valve sleeve forms a first notch, the first notch is connected to the space outside the solenoid valve, the side wall of the suction element has a second notch connected to the first notch, the second notch is connected to the upper chamber, and the first notch and the second notch together form the third balancing passage.

[0020] Furthermore, the balancing passage includes a fourth balancing passage, the periphery of the suction element is welded to the valve sleeve, the non-welded area between the suction element and the valve sleeve forms a first notch, the first notch is connected to the space outside the solenoid valve, the outer surface of the suction element has a knurled structure, the gap between the knurled structure and the valve sleeve forms a flow passage, both ends of which are connected to the first notch and the upper chamber, respectively, and the first notch and the flow passage constitute the fourth balancing passage.

[0021] Furthermore, the balancing passage includes a fifth balancing passage, in which the inner wall of the first mounting hole has a first groove, and the bottom wall of the first mounting hole has a second groove, one end of the first groove communicates with the space outside the solenoid valve, the other end of the first groove communicates with one end of the second groove, and the other end of the second groove communicates with the lower chamber, and the first groove and the second groove together form a fifth balancing passage.

[0022] Furthermore, the positioning groove communicates with the lower chamber, one end of the movable core facing the attractor has an assembly hole which communicates with the upper chamber, the movable core further has a balancing hole which has both ends communicating with the assembly hole and the positioning groove respectively, the solenoid valve further includes a second elastic member which is disposed in the assembly hole.

[0023] The spindle further comprises a guide head, a rod and a sealing head connected in sequence. The valve chamber comprises a sealing chamber, a flow chamber and a valve orifice chamber, which are connected in sequence. The valve seat has a flow hole which is connected to the flow chamber. The valve orifice is located on the side of the valve orifice chamber remote from the flow chamber. The guide head is movably mounted within the sealing chamber and sealingly engages with the inner wall of the sealing chamber. The opening of the sealing chamber facing the armature is connected to the mandrel chamber. The flow area of ​​the cavity between the inner wall of the sealing chamber and the outer wall of the rod is S1, and the flow area of ​​the cavity between the inner wall of the valve orifice chamber and the outer wall of the rod is S2, where S1 is the flow area of ​​the cavity. The relationship 0≦S1−S2≦0.3S2 holds.

[0024] Furthermore, the valve seat portion further includes a body structure and an internal limiting ring, the body structure having a valve chamber, the internal limiting ring being provided on the inner wall of the flow chamber and forming a limiting surface facing the surface of the guide head, and a valve orifice chamber being formed in the region of the valve chamber located on the side of the internal limiting ring facing the sealing head.

[0025] The solenoid valve further includes a first sealing ring provided on the outer wall of the sealing head and a second sealing ring provided on the outer wall of the guide head, the outer wall of the second sealing ring sealingly engages with the inner wall of the sealing chamber, the first sealing ring sealingly engages with the inner wall of the valve orifice chamber, the inner diameter of the inner limiting ring is larger than the outer diameter of the sealing head, the inner diameter of the valve orifice chamber is larger than the inner diameter of the inner limiting ring, and the outer diameter of the first sealing ring is larger than the inner diameter of the valve orifice chamber.

[0026] Furthermore, the rod, the sealing chamber and the valve orifice chamber are all cylindrical structures.

[0027] Furthermore, the valve seat portion includes a main body structure and a third sealing ring, the main body structure has a valve chamber, and the outer wall of the main body structure has a third sealing groove, and the third sealing ring is disposed in the third sealing groove and is located between the valve orifice chamber and the flow hole.

[0028] Furthermore, the valve seat portion includes a valve cover and a valve core, the valve cover having an attachment chamber, one end of the valve sleeve being inserted into the attachment chamber, the valve core being fixedly connected to the valve cover, and the valve core having a valve chamber and a valve port that communicate with each other.

[0029] Furthermore, the mounting chamber has a first mounting hole and a second mounting hole that communicate with each other, the radial dimension of the first mounting hole is larger than the radial dimension of the second mounting hole, one end of the valve sleeve is inserted into the first mounting hole, and the valve core passes through the second mounting hole.

[0030] Furthermore, the second mounting hole includes a guide hole and a positioning hole that are connected to each other, the diameter of the positioning hole is larger than the diameter of the guide hole, and there is a second locking surface at the connection point between the positioning hole and the guide hole, and the valve core is locked and engaged with the second locking surface.

[0031] The valve core further includes a core sleeve and an external limiting ring provided on the outer wall of the core sleeve, the core sleeve having a valve chamber and a valve port, wherein the core sleeve passes through the guide hole, and the external limiting ring is located in the positioning hole and abuts against the second stop surface.

[0032] Furthermore, the valve core further includes a sealing ring provided on the outer wall of the core sleeve, and the side wall of the core sleeve is provided with a plurality of circumferential holes, each of which communicates with the valve chamber, and the plurality of circumferential holes are located between the outer limiting ring and the sealing ring.

[0033] Furthermore, the outer wall of the valve sleeve is restrictively engaged with the inner wall of the first mounting hole, and the end face of the valve sleeve abuts against the bottom wall of the first mounting hole.

[0034] Furthermore, the valve core includes a core sleeve and an internal limiting ring, the core sleeve has a valve chamber and a valve port, and the internal limiting ring is provided on the inner wall of the valve chamber. The solenoid valve further includes a first elastic member, the first elastic member is fitted to the spindle, one end of the first elastic member abuts against the stepped surface of the spindle, and the other end of the first elastic member abuts against the internal limiting ring.

[0035] Furthermore, the valve seat further includes a third sealing ring and a fourth sealing ring, the outer wall of the valve cover has a fourth sealing groove, the fourth sealing ring is disposed in the fourth sealing groove, the outer wall of the valve core has a third sealing groove, the third sealing ring is disposed in the third sealing groove, and the side wall of the valve core has a through hole communicating with the valve chamber, the through hole is located between the third sealing ring and the fourth sealing ring.

[0036] The valve cover further includes a sleeve and a retaining ring disposed on an outer wall of the sleeve, the sleeve having a mounting chamber and having an external thread.

[0037] By applying the technical aspects of the present application, a solenoid valve is provided that includes a valve seat having a valve chamber and a valve port that communicate with each other; a valve sleeve having one end connected to the valve seat and a chamber communicating with an opening at one end of the valve chamber away from the valve port; a spindle movably inserted into the valve chamber to seal or open the valve port; and an armature movably disposed within the chamber of the valve sleeve and having one end fastened to one end of the spindle. Using this aspect, the spindle and the armature are provided separately, eliminating the need for additional auxiliary connections, facilitating installation of the entire structure and improving process performance. Furthermore, because the armature is not connected to the spindle, the armature has greater freedom of movement and a reduced risk of jamming. Furthermore, because the spindle is connected to the armature and does not move with it, controlling the fastening engagement between the armature and the spindle further controls the opening and closing of the valve port. [Brief explanation of the drawings]

[0038] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and descriptions thereof are intended to aid in the interpretation of the application and are not intended to unduly limit the application.

[0039] [Figure 1] 1 shows a schematic diagram of the configuration of a solenoid valve provided by an embodiment of the present application. [Figure 2] A schematic diagram of the spindle configuration of the solenoid valve of Figure 1 is shown. [Figure 3] 2 shows a schematic assembly diagram of the valve seat and valve sleeve in the solenoid valve of FIG. 1. [Figure 4] A schematic diagram of the main body structure of the solenoid valve in Figure 1 is shown. [Figure 5] 2 shows a schematic diagram of the structure of the valve core of the valve seat portion in the solenoid valve of FIG. 1. [Figure 6] 2 is a schematic diagram showing the configuration of the valve cover of the valve seat portion of the solenoid valve of FIG. 1. [Figure 7] 2 is a schematic diagram of the configuration of the solenoid valve of FIG. 1 in a closed state. [Figure 8] 2 is a schematic diagram showing the configuration of a valve sleeve provided with a first balancing passage in the solenoid valve of FIG. 1; [Figure 9] 2 is a schematic diagram showing the configuration of an attractor provided with a second equalizing passage in the solenoid valve of FIG. 1; [Figure 10] 2 is a schematic diagram showing the configuration of an attractor provided with a third balancing passage in the solenoid valve of FIG. 1; [Figure 11] 2 shows a schematic diagram of the welding configuration between the attractor provided with the first notch and the valve sleeve in the solenoid valve of FIG. 1; [Figure 12] 2 shows a schematic diagram of the configuration of an attractor provided with a second notch in the solenoid valve of FIG. 1; [Figure 13] 13 shows a cross-sectional view of the suction element of FIG. 12. [Figure 14] 2 shows a schematic diagram of the structure of an attractor provided with a flow passage in the solenoid valve of FIG. 1; [Figure 15] 15 shows a cross-sectional view of the aspirator of FIG. 14. [Figure 16]2 is a schematic diagram illustrating the configuration of a valve cover of a valve seat portion in which a fifth balancing passage is provided in the solenoid valve of FIG. 1; [Figure 17] A top view of FIG. 16 is shown.

[0040] Here, the above drawings include the following reference numerals: 10 valve seat portion, 11 valve chamber, 111 sealing chamber, 112 flow chamber, 113 valve orifice chamber, 12 valve orifice, 13 main body structure, 131 valve cover, 1311 sleeve, 1312 retaining ring, 132 valve core, 1321 core sleeve, 1322 outer limiting ring, 1323 sealing ring, 133 mounting chamber, 1331 first mounting hole, 133 2 Second mounting hole, 13321 guide hole, 13322 positioning hole, 14 inner limiting ring, 15 annular sealing ring, 151 third sealing ring, 152 fourth sealing ring, 16 annular sealing groove, 161 third sealing groove, 162 fourth sealing groove, 17 flow hole, 181 limiting surface, 182 guide surface, 191 first stopping surface, 192 second stopping surface, 20 valve sleeves, 30 spindle, 31 guide head, 32 rod, 33 sealing head, 34 first sealing groove, 35 second sealing groove, 36 first tapered surface, 37 second tapered surface, 38 third tapered surface, 40 movable core, 41 positioning groove, 42 assembly hole, 43 balancing hole, 50 suction element, 61 first elastic member, 62 second elastic member, 71 1st sealing ring, 72 2nd sealing ring, 80 core chamber, 81 upper chamber, 82 lower chamber, 91 first balancing passage, 92 second balancing passage, 93 third balancing passage, 94 first notch, 95 second notch, 97 flow passage, 98 fifth balancing passage, 981 first groove, 982 second groove. DETAILED DESCRIPTION OF THE INVENTION

[0041] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. However, it is clear that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The description of at least one exemplary embodiment below is merely explanatory in nature and does not impose any restrictions on the present application and its application or use. Based on the embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0042] As shown in FIGS. 1 to 17 , an embodiment of the present application provides a solenoid valve including a valve seat 10 having a valve chamber 11 and a valve port 12 that communicate with each other, a valve sleeve 20 having one end connected to the valve seat 10 and a chamber that communicates with an opening at one end of the valve chamber 11 away from the valve port 12, a spindle 30 that is movably inserted into the valve chamber 11 so as to seal or open the valve port 12, and a movable iron core 40 that is movably provided within the chamber of the valve sleeve 20 and has one end fastened and engaged with one end of the spindle 30.

[0043] In this embodiment, the spindle 30 and the armature 40 are provided separately, so no additional auxiliary connections are required, which simplifies the installation of the entire structure and improves process performance. Furthermore, because the armature 40 is not connected to the spindle 30, the armature 40 has greater freedom of movement and is less likely to get stuck. Since the spindle 30 is connected to the armature 40, it does not always move with the armature 40. By controlling the engagement of the armature 40 with the spindle 30, the sealing or opening of the valve port 12 can be further controlled.

[0044] Alternatively, the valve seat portion 10 may include a valve cover and a valve core, the valve cover being connected to a valve sleeve 20, the valve core having a valve chamber 11 and a valve port 12, and the valve cover and the valve core being integrally molded or separately molded and then fixedly connected.

[0045] As shown in FIG. 2 , the spindle 30 includes a guide head 31, a rod 32, and a sealing head 33 connected in sequence. The radial dimension of the rod 32 is smaller than the radial dimensions of the guide head 31 and the sealing head 33. The outer wall of the guide head 31 is restrictively engaged with the inner wall of the valve chamber 11. The guide head 31 is fastened and engaged with one end of the movable iron core 40. The sealing head 33 is used to seal or open the valve port 12.

[0046] In this embodiment, the guide head 31 is movably mounted within the valve chamber 11 and is fastened to one end of the movable core 40. The movement of the movable core 40 drives the movement of the guide head 31, guiding the movement of the spindle 30 within the valve chamber 11. The outer wall of the guide head 31 is limitedly engaged with the inner wall of the valve chamber 11 to prevent the spindle 30 from shifting during movement. The sealing head 33 moves in conjunction with the movement of the guide head 31. When the sealing head 33 moves out of the valve port 12, the valve port 12 is opened, and when the sealing head 33 moves into the valve port 12, the valve port 12 is sealed. This allows the spindle 30 to move smoothly, is less likely to rattle, and provides a reliable seal against the valve port 12, improving the usability of the solenoid valve.

[0047] As shown in Figures 1 and 2, the valve seat 10 has a limiting surface 181 therein, and the solenoid valve further includes a first elastic member 61, which is fitted onto the rod 32, one end of which abuts against the guide head 31, and the other end of which abuts against the limiting surface 181. When the valve port 12 is open, the sealing head 33 is located outside the valve seat 10.

[0048] In this embodiment, both ends of the first elastic member 61 abut against the guide head 31 and the limiting surface 181, and as the first elastic member 61 extends, the spindle 30 is moved toward the armature 40, and the sealing head 33 enters the valve port 12 to seal the valve port 12. In this way, the outer wall of the first elastic member 61 is limitedly engaged with the inner wall of the valve seat 10, so that the inner wall of the valve seat 10 provides a guide for the first elastic member 61, improving the guiding effect and eliminating the risk of rattle, making the movement of the spindle 30 more reliable.

[0049] Specifically, when the solenoid valve is energized, the movable core 40 moves away from the valve seat 10, creating a gap between the movable core 40 and the spindle 30. In this case, the first elastic member 61, which is in contact with the limiting surface 181 of the valve seat 10, extends, moving the guide head 31, which is in contact with the other end, toward the movable core 40, and moving the entire spindle 30 toward the movable core 40. Furthermore, the sealing head 33 is inserted into the valve port 12, thereby sealing the valve port 12.

[0050] Specifically, the first elastic member 61 is a spring, and the gap between the inner wall of the first elastic member 61 and the outer wall of the rod 32 is greater than 0.3 mm. This ensures that the fluid inside the solenoid valve flows through the gap between the first elastic member 61 and the rod 32 to the valve port 12, ensuring the flow capacity of the solenoid valve.

[0051] Optionally, the inner diameter of the first elastic member 61 should be equal to or larger than the outer diameter of the sealing head 33 and smaller than the outer diameter of the guide head 31 for ease of installation.

[0052] As shown in Figures 3 to 7, the valve seat 10 includes a main body structure 13, an inner limiting ring 14, and an annular sealing ring 15. The main body structure 13 has a valve chamber 11 and a valve port 12. The outer wall of the main body structure 13 has an annular sealing groove 16. The annular sealing ring 15 is located in the annular sealing groove 16. The inner limiting ring 14 is provided on the inner wall of the valve chamber 11 and forms a limiting surface 181 facing the surface of the first elastic member 61. When the valve port 12 is closed, the sealing head 33 abuts against the inner limiting ring 14.

[0053] In this embodiment, an inner limiting ring 14 is provided to restrict the first elastic member 61 so that the first elastic member 61 is in a compressed state, thereby applying an elastic force to the spindle 30. To ensure the sealing performance of the solenoid valve, an annular sealing groove 16 is formed on the outer wall of the main body structure 13, and an annular sealing ring 15 is disposed in the annular sealing groove 16.

[0054] Specifically, there are two annular sealing grooves 16 and two annular sealing rings 15, the valve seat portion 10 includes a valve cover and a valve core, and two annular sealing grooves 16 are provided on the valve cover and the valve core, respectively, the annular sealing groove 16 provided on the valve cover is the first annular sealing groove 16, and the annular sealing groove 16 provided on the valve core is the second annular sealing groove 16. When used, this solenoid valve is assembled to a connecting seat, which has an inlet chamber and an outlet chamber therein, the inlet chamber communicates with the flow hole 17 of the solenoid valve, and the outlet chamber communicates with the valve port 12 of the solenoid valve, one annular sealing ring 15 is provided in the first annular sealing groove 16 to separate the inlet chamber from the space outside the connecting seat, and the other annular sealing ring 15 is provided in the second annular sealing groove 16 to separate the inlet chamber from the outlet chamber, thereby improving the sealing performance of the solenoid valve.

[0055] 1 and 2, the solenoid valve further includes a first sealing ring 71. The outer wall of the sealing head 33 has a first sealing groove 34, and the first sealing ring 71 is disposed in the first sealing groove 34. When the solenoid valve is energized, the sealing head 33 moves toward the armature 40 and enters the valve port 12, causing the first sealing ring 71 disposed on the sealing head 33 to enter the valve port 12, with the outer wall of the first sealing ring 71 sealingly engaging with the inner wall of the valve port 12. The first sealing ring 71 seals the valve port 12, ensuring reliable sealing. Optionally, the first sealing ring 71 may be soft-sealed, improving the sealing effect.

[0056] Specifically, the valve seat portion 10 further has a flow hole 17 communicating with the valve chamber 11, the outer wall of the guide head 31 has a second sealing groove 35, the solenoid valve further includes a second sealing ring 72, the second sealing ring 72 is disposed in the second sealing groove 35, and the flow hole 17 is located between the guide head 31 and the valve port 12.

[0057] In this embodiment, the fluid enters the valve chamber 11 through the through hole 17, which is located between the guide head 31 and the valve port 12, and the second sealing ring 72 is provided in the second sealing groove 35 on the outer wall of the guide head 31 to seal the area of ​​the valve chamber 11 where the guide head 31 is located.

[0058] Specifically, when the fluid enters the valve chamber 11 through the flow hole 17, it moves toward the valve port 12 and the location where the guide head 31 is located. Therefore, the sealing by the second sealing ring 72 prevents the fluid flowing toward the location where the guide head 31 is located from continuing to flow toward the valve sleeve 20, preventing the fluid from entering the chamber of the valve sleeve 20 and affecting the use of the solenoid valve.

[0059] Optionally, the second sealing ring 72 uses a soft seal as its sealing form, which improves the sealing effect. Optionally, there are two second sealing grooves 35, and two corresponding second sealing rings 72, which improves the sealing effect.

[0060] Furthermore, the guide head 31 has a first tapered surface 36, which is located on the side of the guide head 31 away from the rod 32, and the sealing head 33 has a second tapered surface 37 and a third tapered surface 38, which is located on the side of the sealing head 33 facing the rod 32 and which is located on the side of the sealing head 33 away from the rod 32, where the taper angle of the second tapered surface 37 is A, and is 110°≦A≦170°.

[0061] In this embodiment, the first tapered surface 36 serves as a guide when the spindle 30 moves toward the armature 40 and facilitates installation of the second sealing ring 72. The second tapered surface 37 serves as a guide for the fluid flowing out of the valve port 12, reducing fluid resistance. The third tapered surface 38 facilitates insertion and installation. Here, if the taper angle of the second tapered surface 37 is A, then 110°≦A≦170°. Within this range, the flow capacity of the second tapered surface 37 is improved and the impact force of the fluid on the sealing head 33 is reduced.

[0062] As shown in FIG. 7, one end of the movable iron core 40 facing the valve port 12 is provided with a positioning groove 41, one end of the spindle 30 is fastened and engaged with the bottom wall of the positioning groove 41, the valve seat portion 10 further has a guide surface 182 and a first stop surface 191, the inner wall of the positioning groove 41 is restrainedly engaged with the guide surface 182, and the bottom wall of the positioning groove 41 is fastened and engaged with the first stop surface 191.

[0063] In this embodiment, a positioning groove 41 is provided on one end of the armature 40 facing the valve port 12, a portion of the valve seat 10 is always located within the positioning groove 41, the armature 40 is movably mounted within the valve sleeve 20, and a guide surface 182 of the valve seat 10 guides the armature 40 during movement to prevent deviations in the movement of the armature 40. As the armature 40 moves toward the valve port 12, the bottom wall of the positioning groove 41 is stopped and engaged with a first stop surface 191 of the valve seat 10 to prevent the armature 40 from continuing to move. In this manner, the positioning groove 41 restricts the movement of the armature 40, preventing deviations in the movement of the armature 40 that would affect the use of the solenoid valve.

[0064] Specifically, the bottom wall of the positioning groove 41 is also retainingly engaged with one end of the spindle 30. When the solenoid valve is energized, the inner wall of the positioning groove 41 is restrictively engaged with the guide surface 182. When the solenoid valve is turned off and the solenoid valve changes from closed to open, the armature 40 moves toward the valve port 12 and abuts against one end of the spindle 30, causing the spindle 30 to move. During the movement, the guide surface 182 always acts as a guide for the armature 40. When the bottom wall of the positioning groove 41 reaches the first retaining surface 191, the armature 40 will not move any further. In this case, the armature 40 is retainingly engaged with the first retaining surface 191 and one end of the spindle 30, i.e., one end of the guide head 31.

[0065] The solenoid valve further includes an attractor 50, which is provided in the valve sleeve 20 and located on the side of the movable iron core 40 away from the valve seat 10. When the solenoid valve is energized, the attractor 50 generates a magnetic force to attract the movable iron core 40, and the movable iron core 40 is attracted to the attractor 50. When the solenoid valve is powered off, the movable iron core 40 moves away from the attractor 50 and is retained and engaged with the valve seat 10.

[0066] Furthermore, to enable the solenoid valve to open normally, the solenoid valve further includes a second elastic member 62, both ends of which abut against the attractor 50 and the movable iron core 40, respectively; the solenoid valve further includes a first elastic member 61, which is fitted to the spindle 30, and the elastic force of the second elastic member 62 is greater than the elastic force of the first elastic member 61.

[0067] Alternatively, the second elastic member 62 may be a spring, one end of which is provided within the movable core 40 and the other end of which is in contact with the attractor 50 .

[0068] Specifically, when the solenoid valve is powered off, the attractor 50 no longer attracts the movable iron core 40, and the compressed second elastic member 62 expands, pushing the movable iron core 40 in a direction away from the attractor 50. In the process of pushing the movable iron core 40, the bottom wall of the positioning groove 41 of the movable iron core 40 abuts against one end of the guide head 31 of the spindle 30, and the movable iron core 40 moves the spindle 30. The first elastic member 61 is fitted to the spindle 30, and one end of the first elastic member 61 abuts against the internal limiting ring 14 of the valve seat 10 and the other end abuts against the guide head 31 of the spindle 30. Since the elastic force of the second elastic member 62 is greater than the elastic force of the first elastic member 61, the spindle 30 and the movable iron core 40 move in a direction away from the suction element 50 under the elastic force of the second elastic member 62, compressing the first elastic member 61 fitted to the spindle 30 until the bottom wall of the positioning groove 41 of the movable iron core 40 abuts against the first stop surface 191 of the valve seat portion 10. When the second elastic member 62 stops expanding, the movable iron core 40 and the spindle 30 stop moving, and the first elastic member 61 stops compressing. In this case, the sealing head 33 moves outside the valve port 12 to open the valve port 12.

[0069] As shown in Figures 1 to 7, the valve seat portion 10 has a first mounting hole 1331, one end of the valve sleeve 20 penetrates the first mounting hole 1331, the opening of the valve chamber 11 facing the armature 40 communicates with the first mounting hole 1331, the communicating space within the chamber of the valve sleeve 20 is the core chamber 80, the core chamber 80 includes an upper chamber 81 and a lower chamber 82 that communicate with each other, the upper chamber 81 is defined by the space between the armature 40 and the attractor 50, and the lower chamber 82 is defined by the space between the bottom wall of the first mounting hole 1331 and the armature 40, and the solenoid valve further includes a balancing passage that connects the upper chamber 81 and / or the lower chamber 82 with the space outside the solenoid valve.

[0070] In this embodiment, during the movement of the spindle 30, the core chamber 80 is always connected to the space outside the solenoid valve so that the pressure inside the core chamber 80 can be adjusted. This prevents a small amount of fluid from entering the core chamber 80 along the valve chamber 11, which could cause the pressure inside the core chamber 80 to become high. This stabilizes the pressure inside the core chamber 80 and the pressure at both ends of the spindle 30, thereby improving the reliability and stability of the movement of the spindle 30 and eliminating the risk of failure of the solenoid valve. The chamber of the valve sleeve 20 communicates with the valve chamber 11, and the core chamber 80 is located within this communication. The chamber at one end of the armature 40 closest to the attractor 50 is the upper chamber 81, and the chamber at the other end is the lower chamber 82. The equalizing passage connects the upper chamber 81 and / or the lower chamber 82 to the space outside the solenoid valve so as to equalize the pressure within the core chamber 80. This prevents a small amount of fluid from entering the core chamber 80, which could lead to an increase in pressure within the core chamber 80, ensuring the reliability and stability of the operation of the spindle 30. Specifically, the communication gap is a space within the chamber of the valve sleeve 20, excluding any physical structure, and can also be considered as a space in which different regions are connected as a whole. The physical structure includes the valve seat 10, the spindle 30, the armature 40, the attractor 50, etc.

[0071] Alternatively, the upper chamber 81 and the lower chamber 82 of the core chamber 80 communicate with each other through the gap between the armature 40 and the valve sleeve 20. A plurality of balancing passages may be provided, which can cooperate to adjust the pressure in the core chamber 80 better and more quickly, and further ensure the reliability of the movement of the spindle 30.

[0072] As shown in FIG. 8, the balancing passage includes a first balancing passage 91, which is provided in the side wall of the valve sleeve 20, one end of which communicates with the upper chamber 81, and the other end of which communicates with the space outside the solenoid valve.

[0073] In this embodiment, the first balancing passage 91 is provided on the side wall of the valve sleeve 20 and is connected to the upper chamber 81, and the lower chamber 82 is connected to the upper chamber 81 through the gap between the movable iron core 40 and the valve sleeve 20. When the movable iron core 40 in the solenoid valve moves, the fluid in the upper chamber 81 is connected to the space outside the solenoid valve through the first balancing passage 91, thereby adjusting the pressure in the core chamber 80 and preventing a small amount of fluid from entering the core chamber 80 and causing the pressure in the core chamber 80 to become high, thereby ensuring the reliability and stability of the operation of the spindle 30.

[0074] Optionally, the upper chamber 81 has a maximum volume in the open state, and the first balancing passage 91 is provided corresponding to the upper chamber 81 in the open state.

[0075] As shown in FIG. 9 , the balancing passage includes a second balancing passage 92, which is a through-hole that passes through the aspirator 50. One end of the second balancing passage 92 communicates with the upper chamber 81, and the other end of the second balancing passage 92 communicates with the space outside the solenoid valve.

[0076] In this embodiment, the second balancing passage 92 is a through hole provided in the attractor 50, and the fluid in the lower chamber 82 is connected to the fluid in the upper chamber 81 through the gap between the movable iron core 40 and the valve sleeve 20. When the movable iron core 40 in the solenoid valve moves, the fluid in the upper chamber 81 is connected to the space outside the solenoid valve through the second balancing passage 92, thereby adjusting the pressure in the core chamber 80 and preventing a small amount of fluid from entering the core chamber 80 and causing the pressure in the core chamber 80 to become high, thereby ensuring the reliability and stability of the operation of the spindle 30.

[0077] As shown in Figures 10 to 13, the balancing passage includes a third balancing passage 93, the periphery of the suction element 50 is welded to the valve sleeve 20, the non-welded area between the suction element 50 and the valve sleeve 20 forms a first notch 94, which communicates with the space outside the solenoid valve, the side wall of the suction element 50 has a second notch 95 which communicates with the first notch 94, which communicates with the upper chamber 81, and the first notch 94 and the second notch 95 together form the third balancing passage 93.

[0078] In this embodiment, the third balancing passage 93 is composed of a first notch 94 and a second notch 95. The second notch 95 is located at a position corresponding to the first notch 94, is located on the side wall of the suction element, and penetrates the suction element. One end of the second notch 95 communicates with the upper chamber 81, and the other end of the second notch 95 communicates with the first notch 94. The lower chamber 82 communicates with the upper chamber 81 through the gap between the armature 40 and the valve sleeve 20. When the armature 40 in the solenoid valve moves, the fluid in the upper chamber 81 communicates with the space outside the solenoid valve through the third balancing passage 93, thereby adjusting the pressure in the core chamber 80 and preventing a small amount of fluid from entering the core chamber 80 and causing an increase in pressure therein. This ensures the reliability and stability of the operation of the spindle 30.

[0079] As shown in Figures 10, 14 and 15, the balancing passage includes a fourth balancing passage, the periphery of the suction element 50 is welded to the valve sleeve 20, the non-welded area between the suction element 50 and the valve sleeve 20 forms a first notch 94, which communicates with the space outside the solenoid valve, the outer surface of the suction element 50 has a knurled structure, and the gap between the knurled structure and the valve sleeve 20 forms a flow passage 97, both ends of which communicate with the first notch 94 and the upper chamber 81, respectively, and the first notch 94 and the flow passage 97 constitute the fourth balancing passage.

[0080] In this embodiment, the fourth balancing passage is formed by the first notch 94 and the flow passage 97, and the lower chamber 82 communicates with the upper chamber 81 through the gap between the armature 40 and the valve sleeve 20. When the armature in the solenoid valve moves, the fluid in the core chamber 80 communicates with the space outside the solenoid valve through the fourth balancing passage, thereby adjusting the pressure in the core chamber 80 and preventing a small amount of fluid from entering the core chamber 80 and causing the pressure in the core chamber 80 to become high, thereby ensuring the reliability and stability of the operation of the spindle 30. Specifically, the fourth balancing passage is formed by the first notch 94 and a portion of the flow passage 97 provided corresponding to the first notch 94.

[0081] 16 and 17 , the balancing passage includes a fifth balancing passage 98, in which a first groove 981 is formed on the inner wall of the first mounting hole 1331, and a second groove 982 is formed on the bottom wall of the first mounting hole 1331, with one end of the first groove 981 communicating with the space outside the solenoid valve, the other end of the first groove 981 communicating with one end of the second groove 982, and the other end of the second groove 982 communicating with the lower chamber 82, and the first groove 981 and the second groove 982 together form the fifth balancing passage 98.

[0082] In this embodiment, the fifth balancing passage 98 is composed of a first groove 981 and a second groove 982, and the upper chamber 81 communicates with the lower chamber 82 through the gap between the armature 40 and the valve sleeve 20. When the armature 40 in the solenoid valve moves, the fluid in the lower chamber 82 communicates with the space outside the solenoid valve through the fifth balancing passage 98, thereby adjusting the pressure in the core chamber 80 and preventing a small amount of fluid from entering the core chamber 80 and causing an increase in pressure therein, thereby ensuring the reliability and stability of the operation of the spindle 30. Specifically, one end of the first groove 981 communicates with the second groove 982, and the first groove 981 is located between the valve seat 10 and the valve sleeve 20.

[0083] As shown in Figures 1 and 7, the positioning groove 41 communicates with the lower chamber 82, one end of the movable core 40 facing the attractor 50 has an assembly hole 42 which communicates with the upper chamber 81, the movable core 40 further has a balancing hole 43 which both ends communicate with the assembly hole 42 and the positioning groove 41 respectively, the solenoid valve further includes a second elastic member 62 which is disposed in the assembly hole 42.

[0084] In this embodiment, the positioning groove 41 is provided to restrict the movement of the movable core 40, thereby preventing the movable core 40 from shifting during movement and affecting the use of the solenoid valve. The movable core 40 has an assembly hole 42 and a balancing hole 43. The radial dimension of the assembly hole 42 is larger than the radial dimension of the balancing hole 43. The assembly hole 42 and the balancing hole 43 form a stepped surface. One end of the second elastic member 62 that enters the assembly hole 42 abuts this stepped surface, and the other end abuts the attractor, thereby restricting the second elastic member 62 and preventing the second elastic member 62 from shifting during movement of the movable core 40 and affecting the performance of the solenoid valve. Both ends of the balancing hole 43 are connected to the positioning groove 41 and the assembly hole 42, respectively. The opening of the positioning groove 41 is connected to the lower chamber 82, and the opening of the assembly hole 42 is connected to the upper chamber 81. By providing the balancing hole 43, the upper chamber 81 and the lower chamber 82 are connected to each other, which can better ensure the flow of fluid between the upper chamber 81 and the lower chamber 82 of the core chamber 80. By using the balancing hole 43 in combination with the balancing passage, the efficiency of pressure adjustment within the core chamber 80 is further improved.

[0085] As shown in Figures 1, 2 and 4, the spindle 30 includes a guide head 31, a rod 32 and a sealing head 33 connected in sequence. The valve chamber 11 includes a sealed chamber 111, a flow chamber 112 and a valve orifice chamber 113, which are connected in sequence. The valve seat 10 has a flow hole 17 which communicates with the flow chamber 112. The valve orifice 12 is located on the side of the valve orifice chamber 113 away from the flow chamber 112. The guide head 31 is movably mounted within the sealed chamber 111 and sealingly engages with the inner wall of the sealed chamber 111. The opening of the sealed chamber 111 facing the armature 40 communicates with the mandrel chamber 80. The flow area of ​​the cavity between the inner wall of the sealed chamber 111 and the outer wall of the rod 32 is S1, and the flow area of ​​the cavity between the inner wall of the valve orifice chamber 113 and the outer wall of the rod 32 is S2, where S1 is the flow area of ​​the cavity.

[0086] In this embodiment, the fluid entering the valve chamber 11 through the flow hole 17 generates the same pressure at the two flow areas S1 and S2. Therefore, by controlling the difference between the areas S1 and S2 within the above range, the areas S1 and S2 are approximately equal. As a result, after the valve orifice chamber 113 is closed, the pressures experienced by the guide head 31 and the sealing head 33 are approximately equal. Therefore, even if the spindle 30 is subjected to a higher pressure shock, its operational performance is not affected, improving the reliability of the solenoid valve. Specifically, by making the pressure intensity within the core chamber 80 approximately equal to the pressure intensity outside the solenoid valve spindle, the pressure balance at both ends of the spindle 30 is better ensured. For example, when used in an atmospheric environment, the outlet of the valve orifice chamber 113 is the atmospheric environment, and the fluid sealed within the core chamber 80 is the atmospheric environment during the installation and sealing process of the solenoid valve. In this way, the pressure strengths received by both ends of the spindle 30 are the same as the atmospheric pressure strength, and the pressure balance between both ends of the spindle 30 can be better ensured during use of the spindle 30.

[0087] As shown in Figures 4 and 5, the valve seat part 10 further includes a main body structure 13 and an internal limiting ring 14, the main body structure 13 has a valve chamber 11, the internal limiting ring 14 is disposed on the inner wall of the flow chamber 112 and forms a limiting surface 181 facing the surface of the guide head 31, and a valve orifice chamber 113 is formed in the region of the valve chamber 11 located on the side of the internal limiting ring 14 facing the sealing head 33.

[0088] In this embodiment, an internal limiting ring 14 is provided to limit the first elastic member 61, so that the first elastic member 61 is compressed when the valve is opened, and an elastic force is applied to the spindle 30 when the valve is closed.

[0089] As shown in Figures 1 to 7, the solenoid valve further includes a first sealing ring 71 provided on the outer wall of the sealing head 33 and a second sealing ring 72 provided on the outer wall of the guide head 31, the outer wall of the second sealing ring 72 sealingly engages with the inner wall of the sealing chamber 111, the first sealing ring 71 is used to sealingly engage with the inner wall of the valve orifice chamber 113, the inner diameter of the inner limiting ring 14 is larger than the outer diameter of the sealing head 33, the inner diameter of the valve orifice chamber 113 is larger than the inner diameter of the inner limiting ring 14, and the outer diameter of the first sealing ring 71 is larger than the inner diameter of the valve orifice chamber 113.

[0090] In this embodiment, the first elastic member 61 is inserted into the end of the spindle 30 where the sealing head 33 is located, and abuts against the end face of the guide head 31. Then, the spindle 30 with the first elastic member 61 is inserted into the sealing chamber 111 of the valve seat 10 from one end, so that the sealing head 33 of the spindle 30 penetrates the valve chamber 11. The first elastic member 61 fitted to the spindle 30 abuts against the inner limiting ring 14, and the guide head 31 is movably mounted within the sealing chamber 111 and engages with the inner wall of the sealing chamber 111 in a limited manner, thereby completing the installation of the spindle 30. The inner diameter of the inner limiting ring 14 is larger than the outer diameter of the sealing head 33 so that the sealing head 33 can penetrate through the inner limiting ring 14 and enter the valve orifice chamber 113. The inner diameter of the valve orifice chamber 113 is larger than the inner diameter of the inner limiting ring 14 so that the first sealing ring 71 on the sealing head 33 can enter and seal the valve orifice chamber 113. The outer diameter of the first sealing ring 71 is larger than the inner diameter of the valve orifice chamber 113 to ensure a reliable seal against the valve orifice chamber 113.

[0091] Optionally, the inner diameter of the first elastic member 61 is larger than the outer diameter of the sealing head 33 to facilitate assembly of the first elastic member 61 .

[0092] As shown in FIG. 1, the rod 32, the sealing chamber 111 and the valve orifice chamber 113 are all cylindrical structures.

[0093] By doing so, it becomes easy to limit the areas S1 and S2. Specifically, if the inner diameter of the sealed chamber 111 is D1, the inner diameter of the valve orifice chamber 113 is D2, and the outer diameter of the rod 32 is D3, then S1 / S2=(D1 2 -D3 2 ) / (D2 2 -D3 2 ) In this embodiment, S1 is the area of ​​the annulus formed between the sealed chamber 111 and the rod 32, S2 is the area of ​​the annulus formed between the valve orifice chamber 113 and the rod 32, the flow area S1 is the cross-sectional area of ​​the sealed chamber 111 minus the cross-sectional area of ​​the rod 32, and the flow area S2 is the cross-sectional area of ​​the valve orifice chamber 113 minus the cross-sectional area of ​​the rod 32. Since the cross-sectional area of ​​the rod 32 does not change, S1 / S2=(D1 2 -D3 2 ) / (D2 2 -D3 2 ) This makes it easy to calculate the flow areas S1 and S2, and the error between the two flow areas can be easily calculated using only D1, D2, and D3, making design easier.

[0094] As shown in Figures 1, 3 and 4, the valve seat 10 includes a main body structure 13 and a third sealing ring 151. The main body structure 13 has a valve chamber 11. The main body structure 13 has a third sealing groove 161 on its outer wall. The third sealing ring 151 is disposed in the third sealing groove 161 and is located between the valve orifice chamber 113 and the flow hole 17.

[0095] In this embodiment, the sealing performance of the solenoid valve can be ensured by providing a third sealing ring 151. Specifically, this solenoid valve is assembled to a connecting seat, and the connecting seat has an inlet chamber and an outlet chamber, the inlet chamber communicates with the flow hole 17 of the solenoid valve, and the outlet chamber communicates with the valve port chamber 113 of the solenoid valve. The third sealing ring 151 is provided in a third sealing groove 161 to separate the inlet chamber and the outlet chamber, thereby improving the sealing performance of the solenoid valve.

[0096] As shown in Figures 4 to 6, the valve seat portion 10 includes a valve cover 131 and a valve core 132, the valve cover 131 has an attachment chamber 133, one end of the valve sleeve 20 is inserted into the attachment chamber 133, the valve core 132 is fixedly connected to the valve cover 131, and the valve core 132 has a valve chamber 11 and a valve port 12 that communicate with each other.

[0097] In this embodiment, the valve cover 131 and the valve core 132 are designed and processed separately, which reduces the difficulty of processing and improves the processing accuracy of the valve cover 131 and the valve core 132, as well as the accuracy of the engagement between the valve cover 131 and the valve core 132 and other components. Furthermore, the freedom of movement of the spindle 30 within the valve core 132 is improved, resulting in better process performance. Furthermore, because the valve cover 131 and the valve core 132 are designed and processed separately, manufacturing efficiency is improved and manufacturing costs are reduced, which is advantageous for manufacturing solenoid valves. Specifically, the valve core 132 and the valve cover 131 can be fixed and connected by welding, which simplifies the process and ensures a reliable connection.

[0098] Specifically, the mounting chamber 133 has a first mounting hole 1331 and a second mounting hole 1332 that communicate with each other. 2 The radial dimension of the first mounting hole 1331 is equal to that of the second mounting hole 133 2 The radial dimension of the valve sleeve 20 is larger than that of the valve core 132, and one end of the valve sleeve 20 is inserted into the first mounting hole 1331, and the valve core 132 is inserted into the second mounting hole 133 2 By doing so, the second mounting hole 133 of the valve core 132 2 This ensures that the portion that penetrates through the valve core 132 is also located within the valve sleeve 20, allowing the chamber of the valve sleeve to communicate with the valve chamber 11, and also facilitating assembly of the valve core 132, valve cover 131 and valve sleeve 20.

[0099] Furthermore, the second mounting hole 133 2 The valve core 132 includes a guide hole 13321 and a positioning hole 13322 that are connected to each other, the diameter of the positioning hole 13322 is larger than the diameter of the guide hole 13321, and a second locking surface 192 is located at the connection point between the positioning hole 13322 and the guide hole 13321, and the valve core 132 is locked and engaged with the second locking surface 192.

[0100] In this embodiment, one end of the valve core 132 is inserted into the first mounting hole 1331 through the guide hole 13321, and the guide role of the guide hole 13321 improves the engagement accuracy and the coaxiality between the valve core 132 and the valve cover 131. The provision of the second stop surface 192 realizes limited engagement between the valve core 132 and the valve cover 131, thereby limiting the relative positions of the valve core 132 and the valve cover 131. This structure facilitates processing and facilitates accurate attachment of the valve core 132 and the valve cover 131.

[0101] 5, the valve core 132 includes a core sleeve 1321 and an external limiting ring 1322 disposed on the outer wall of the core sleeve 1321. The core sleeve 1321 has a valve chamber 11 and a valve port 12. The core sleeve 1321 passes through a guide hole 13321, and the external limiting ring 1322 is positioned within the positioning hole 13322 and abuts against the second stop surface 192. In this embodiment, the external limiting ring 1322 is positioned within the positioning hole 13322. The engagement between the external limiting ring 1322, the positioning hole 13322, and the second stop surface 192 engages the valve core 132 with the valve cover 131, ensuring stable and reliable engagement and facilitating pressure installation.

[0102] Specifically, the outer limiting ring 1322 and the positioning hole 13322 form an interference fit, further improving positioning accuracy. The guide and interference fit between the valve core 132 and the valve cover 131 improves the welding quality between the valve core 132 and the valve cover 131, and also prevents the welding material from seeping downward and flowing into the inner surface of the valve core 132, thereby increasing the sealing strength.

[0103] Furthermore, the valve core 132 further includes a sealing ring 1323 provided on the outer wall of the core sleeve 1321, and a plurality of flow holes 17 are provided along the circumferential direction on the side wall of the core sleeve 1321, each of which is connected to the valve chamber 11, and the plurality of flow holes 17 are located between the outer limiting ring 1322 and the sealing ring 1323.

[0104] In this embodiment, a plurality of through holes 17 are provided in the side wall of the core sleeve 1321 along the circumferential direction, allowing fluids from different directions to be introduced into the valve chamber 11 through the through holes 17. The sealing ring 1323 is used to isolate the through holes 17 from the valve port 12 outside the solenoid valve, thereby achieving a sealing effect after the solenoid valve is engaged with other structures.

[0105] As shown in FIG. 3, the outer wall of the valve sleeve 20 is restrictively engaged with the inner wall of the first mounting hole 1331 , and the end face of the valve sleeve 20 abuts against the bottom wall of the first mounting hole 1331 .

[0106] In this embodiment, the assembly position of the valve sleeve 20 is determined by the engagement between the valve sleeve 20 and the first mounting hole 1331, thereby improving assembly accuracy. Specifically, the valve sleeve 20 is fixed to the valve cover 131 by welding, which makes the operation simple and the connection stable and reliable.

[0107] As shown in Figures 1 and 4, the valve core 132 includes a core sleeve 1321 and an internal limiting ring 14. The core sleeve 1321 has a valve chamber 11 and a valve port 12. The internal limiting ring 14 is disposed on the inner wall of the valve chamber 11. The solenoid valve further includes a first elastic member 61. The first elastic member 61 is fitted to the spindle 30. One end of the first elastic member 61 abuts against the stepped surface of the spindle 30, and the other end of the first elastic member 61 abuts against the internal limiting ring 14.

[0108] In this way, an elastic force is applied to the spindle 30 by the first elastic member 61 so that the movement of the spindle 30 closes the valve port 12. Specifically, the first elastic member 61 is fitted to the spindle 30, a step surface is formed between the guide head and the rod, and one end of the first elastic member 61 abuts against the step surface, i.e., one end of the first elastic member 61 abuts against one end of the guide head and the other end of the first elastic member 61 abuts against the inner limiting ring 14, and the extension of the first elastic member 61 realizes the closing of the solenoid valve.

[0109] As shown in Figures 1, 3 and 7, the valve seat portion 10 further includes a third sealing ring 151 and a fourth sealing ring 152. The valve cover 131 has an outer wall formed with a fourth sealing groove 162, and the fourth sealing ring 152 is disposed in the fourth sealing groove 162. The valve core 132 has an outer wall formed with a third sealing groove 161, and the third sealing ring 151 is disposed in the third sealing groove 161. The valve core 132 has a side wall formed with a through hole 17 communicating with the valve chamber 11, and the through hole 17 is located between the third sealing ring 151 and the fourth sealing ring 152.

[0110] In this embodiment, the fourth sealing ring 152 on the valve cover 131 and the third sealing ring 151 on the valve core 132 ensure a good sealing effect after the solenoid valve is assembled with other components. Specifically, in this embodiment, the third sealing groove 161 is provided on the sealing ring 1323. Specifically, the solenoid valve is used by engaging with the connecting seat. The connecting seat has an inlet chamber and an outlet chamber, the inlet chamber communicating with the flow hole 17 and the outlet chamber communicating with the valve port 12. The fourth sealing ring 152 is used to separate the inlet chamber from the space outside the connecting seat, and the third sealing ring 151 is used to separate the inlet chamber from the outlet chamber. This ensures the flow of fluid within the solenoid valve, improves the sealing effect, and ensures reliable use of the solenoid valve.

[0111] Alternatively, the fourth seal ring 152 and the third seal ring 151 may use soft seals to improve the sealing effect.

[0112] As shown in FIG. 6 , the valve cover 131 includes a sleeve 1311 and a retaining ring 1312 attached to the outer wall of the sleeve 1311. The sleeve 1311 has an attachment chamber 133 and a male thread. In this embodiment, the valve cover 131 includes the sleeve 1311 and the retaining ring 1312. When assembling the solenoid valve, the retaining ring 1312 plays a positioning and limiting role to ensure assembly accuracy. The sleeve 1311 includes the attachment chamber 133, which facilitates assembly of the valve core 132 and the valve sleeve 20. The sleeve 1311 has a male thread, which facilitates installation of the solenoid valve. Specifically, the connecting seat has an accommodation chamber, the solenoid valve is installed in the accommodation chamber, and the retaining ring 1312 of the solenoid valve valve cover 131 is engaged with the end face of the connecting seat at one end where the accommodation chamber opens, so as to restrict the solenoid valve from entering the connecting seat. A male thread is provided on the sleeve 1311 of the valve cover 131 of the solenoid valve, and a female thread is provided inside the chamber, and the solenoid valve is inserted into the chamber by screwing, so the connection is stable and reliable.

[0113] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included within the protection scope of the present application.

Claims

1. a valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The spindle (30) includes a guide head (31), a rod (32), and a sealing head (33) connected in this order, the radial dimension of the rod (32) is smaller than the radial dimensions of the guide head (31) and the sealing head (33), the outer wall of the guide head (31) is restrictively engaged with the inner wall of the valve chamber (11), the guide head (31) is stop-engaged with one end of the movable iron core (40), and the sealing head (33) is used to seal or open the valve port (12). The valve seat portion (10) has a limiting surface (181) therein, and the solenoid valve further includes a first elastic member (61), the first elastic member (61) is fitted onto the rod (32), one end of the first elastic member (61) abuts against the guide head (31), and the other end of the first elastic member (61) abuts against the limiting surface (181), and when the valve port (12) is open, the sealing head (33) is located outside the valve seat portion (10).

2. 2. The solenoid valve according to claim 1, wherein the first elastic member (61) is a spring, and a gap between an inner wall of the first elastic member (61) and an outer wall of the rod (32) is greater than 0.3 mm.

3. 2. The solenoid valve according to claim 1, wherein the valve seat portion (10) includes a main body structure (13), an inner limiting ring (14), and an annular sealing ring (15), the main body structure (13) having the valve chamber (11) and the valve port (12), an annular sealing groove (16) formed on an outer wall of the main body structure (13), the annular sealing ring (15) being located in the annular sealing groove (16), the inner limiting ring (14) being provided on an inner wall of the valve chamber (11) and forming the limiting surface (181) toward a surface of the first elastic member (61), and the sealing head (33) abuts against the inner limiting ring (14) when the valve port (12) is closed.

4. A valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The spindle (30) includes a guide head (31), a rod (32), and a sealing head (33) connected in this order, the radial dimension of the rod (32) is smaller than the radial dimensions of the guide head (31) and the sealing head (33), the outer wall of the guide head (31) is restrictively engaged with the inner wall of the valve chamber (11), the guide head (31) is stop-engaged with one end of the movable iron core (40), and the sealing head (33) is used to seal or open the valve port (12). The solenoid valve further includes a first sealing ring (71), and the outer wall of the sealing head (33) has a first sealing groove (34), and the first sealing ring (71) is disposed in the first sealing groove (34).

5. A valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The spindle (30) includes a guide head (31), a rod (32), and a sealing head (33) connected in this order, the radial dimension of the rod (32) is smaller than the radial dimensions of the guide head (31) and the sealing head (33), the outer wall of the guide head (31) is restrictively engaged with the inner wall of the valve chamber (11), the guide head (31) is stop-engaged with one end of the movable iron core (40), and the sealing head (33) is used to seal or open the valve port (12). the valve seat portion (10) further has a flow hole (17) communicating with the valve chamber (11), the outer wall of the guide head (31) has a second sealing groove (35), the solenoid valve further includes a second sealing ring (72), the second sealing ring (72) is disposed in the second sealing groove (35), and the flow hole (17) is located between the guide head (31) and the valve port (12).

6. A valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The spindle (30) includes a guide head (31), a rod (32), and a sealing head (33) connected in this order, the radial dimension of the rod (32) is smaller than the radial dimensions of the guide head (31) and the sealing head (33), the outer wall of the guide head (31) is restrictively engaged with the inner wall of the valve chamber (11), the guide head (31) is stop-engaged with one end of the movable iron core (40), and the sealing head (33) is used to seal or open the valve port (12). The guide head (31) has a first tapered surface (36), which is located on a side of the guide head (31) away from the rod (32), and the sealing head (33) has a second tapered surface (37) and a third tapered surface (38), which is located on a side of the sealing head (33) facing the rod (32), and the third tapered surface (38) is located on a side of the sealing head (33) away from the rod (32), wherein, when a taper angle of the second tapered surface (37) is A, 110°≦A≦170°.

7. A valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The solenoid valve further includes an attractor (50), the attractor (50) being disposed within the valve sleeve (20) and located on a side of the movable core (40) away from the valve seat (10), the movable core (40) having a positioning groove (41) at one end facing the valve port (12), one end of the spindle (30) being engaged with a bottom wall of the positioning groove (41), the valve seat (10) further having a guide surface (182) and a first stop surface (191), the inner wall of the positioning groove (41) being restrictively engaged with the guide surface (182), and the bottom wall of the positioning groove (41) being engaged with the first stop surface (191).

8. 8. The solenoid valve according to claim 7, further comprising a second elastic member (62), both ends of which abut against the attractor (50) and the movable iron core (40), respectively; and further comprising a first elastic member (61), which is fitted to the spindle (30), and the elastic force of the second elastic member (62) is greater than the elastic force of the first elastic member (61).

9. The valve seat portion (10) has a first mounting hole (1331), one end of the valve sleeve (20) penetrates the first mounting hole (1331), an opening of the valve chamber (11) facing the movable iron core (40) communicates with the first mounting hole (1331), a communicating space within the chamber of the valve sleeve (20) is a core chamber (80), and the core chamber (80) includes an upper chamber (81) and a lower chamber (82) that communicate with each other, 8. The solenoid valve according to claim 7, wherein the upper chamber (81) is defined by the space between the movable iron core (40) and the attractor (50), and the lower chamber (82) is defined by the space between the bottom wall of the first mounting hole (1331) and the movable iron core (40), and the solenoid valve further includes a balancing passage, which connects the upper chamber (81) and / or the lower chamber (82) with a space outside the solenoid valve.

10. 10. The solenoid valve according to claim 9, wherein the balancing passage includes a first balancing passage (91), the first balancing passage (91) being provided in a side wall of the valve sleeve (20), one end of the first balancing passage (91) communicating with the upper chamber (81), and the other end of the first balancing passage (91) communicating with a space outside the solenoid valve.

11. 10. The solenoid valve according to claim 9, wherein the balancing passage includes a second balancing passage (92), the second balancing passage (92) being a through hole that passes through the attractor (50), one end of the second balancing passage (92) communicating with the upper chamber (81), and the other end of the second balancing passage (92) communicating with a space outside the solenoid valve.

12. 10. The solenoid valve of claim 9, wherein the balancing passage includes a third balancing passage, the periphery of the suction element is welded to the valve sleeve, the non-welded area between the suction element and the valve sleeve forms a first notch, the first notch communicates with a space outside the solenoid valve, the side wall of the suction element has a second notch communicating with the first notch, the second notch communicates with the upper chamber, and the first notch and the second notch form the third balancing passage.

13. 10. The solenoid valve of claim 9, wherein the balancing passage includes a fourth balancing passage, the periphery of the attractor is welded to the valve sleeve, the non-welded area between the attractor and the valve sleeve forms a first notch, the first notch communicates with the space outside the solenoid valve, the outer circumferential surface of the attractor has a knurled structure, the gap between the knurled structure and the valve sleeve forms a flow passage, both ends of the flow passage communicate with the first notch and the upper chamber, respectively, and the first notch and the flow passage constitute the fourth balancing passage.

14. 10. The solenoid valve of claim 9, wherein the balancing passage includes a fifth balancing passage (98), the inner wall of the first mounting hole (1331) has a first groove (981), the bottom wall of the first mounting hole (1331) has a second groove (982), one end of the first groove (981) communicates with the space outside the solenoid valve, the other end of the first groove (981) communicates with one end of the second groove (982), and the other end of the second groove (982) communicates with the lower chamber (82), and the first groove (981) and the second groove (982) together form the fifth balancing passage (98).

15. 10. The solenoid valve of claim 9, wherein the positioning groove (41) communicates with the lower chamber (82), the movable core (40) has an assembly hole (42) at one end facing the attractor (50), the assembly hole (42) communicating with the upper chamber (81), the movable core (40) further has a balancing hole (43), both ends of which communicate with the assembly hole (42) and the positioning groove (41), respectively, and the solenoid valve further includes a second elastic member (62), the second elastic member (62) being disposed within the assembly hole (42).

16. The spindle (30) includes a guide head (31), a rod (32), and a sealing head (33) connected in this order, the valve chamber (11) includes a sealed chamber (111), a flow chamber (112), and a valve orifice chamber (113) that are connected in this order, the valve seat portion (10) has a flow hole (17), and the flow hole (17) is connected to the flow chamber (112), the valve orifice (12) is located on the side of the valve orifice chamber (113) that is remote from the flow chamber (112), and the guide head (31) is connected to the sealed chamber (111), 10. The solenoid valve according to claim 9, wherein the valve opening is movably disposed within a sealed chamber (111) and is sealingly engaged with an inner wall of the sealed chamber (111), and an opening of the sealed chamber (111) facing the movable iron core (40) communicates with the mandrel chamber (80), wherein, where S1 is a flow area of ​​a cavity between the inner wall of the sealed chamber (111) and the outer wall of the rod (32), and S2 is a flow area of ​​a cavity between the inner wall of the valve orifice chamber (113) and the outer wall of the rod (32), 0≦S1−S2≦0.3S2.

17. 17. The solenoid valve according to claim 16, wherein the valve seat portion (10) further comprises a body structure (13) and an internal limiting ring (14), the body structure (13) having the valve chamber (11), the internal limiting ring (14) being provided on an inner wall of the flow chamber (112) and forming a limiting surface (181) toward a surface of the guide head (31), and the valve orifice chamber (113) is formed in a region of the valve chamber (11) located on a side of the internal limiting ring (14) facing the sealing head (33).

18. 18. The solenoid valve according to claim 17, further comprising a first sealing ring (71) provided on an outer wall of the sealing head (33) and a second sealing ring (72) provided on an outer wall of the guide head (31), an outer wall of the second sealing ring (72) sealingly engaging with an inner wall of the sealing chamber (111), the first sealing ring (71) being used to sealingly engage with an inner wall of the valve orifice chamber (113), an inner diameter of the inner limit ring (14) being larger than an outer diameter of the sealing head (33), an inner diameter of the valve orifice chamber (113) being larger than an inner diameter of the inner limit ring (14), and an outer diameter of the first sealing ring (71) being larger than an inner diameter of the valve orifice chamber (113).

19. 17. The solenoid valve according to claim 16, wherein the rod (32), the sealing chamber (111) and the valve orifice chamber (113) are all cylindrical structures.

20. 17. The solenoid valve according to claim 16, wherein the valve seat portion (10) includes a main body structure (13) and a third sealing ring (151), the main body structure (13) has the valve chamber (11), the outer wall of the main body structure (13) has a third sealing groove (161), and the third sealing ring (151) is disposed in the third sealing groove (161) and is located between the valve orifice chamber (113) and the flow hole (17).

21. A valve seat portion (10) having a valve chamber (11) and a valve port (12) that communicate with each other; a valve sleeve (20) having one end connected to the valve seat portion (10) and a chamber communicating with an opening at one end of the valve chamber (11) away from the valve port (12); a spindle (30) movably inserted into the valve chamber (11) to seal or open the valve port (12); an armature (40) movably provided within the chamber of the valve sleeve (20), one end of which is fastened to one end of the spindle (30); Including, The valve seat portion (10) includes a valve cover (131) and a valve core (132), the valve cover (131) has an attachment chamber (133), one end of the valve sleeve (20) is inserted into the attachment chamber (133), the valve core (132) is fixedly connected to the valve cover (131), and the valve core (132) has a valve chamber (11) and a valve port (12) that communicate with each other.

22. 22. The solenoid valve of claim 21, wherein the mounting chamber (133) has a first mounting hole (1331) and a second mounting hole (1332) that communicate with each other, the radial dimension of the first mounting hole (1331) is larger than the radial dimension of the second mounting hole (1332), one end of the valve sleeve (20) is inserted into the first mounting hole (1331), and the valve core (132) passes through the second mounting hole (1332).

23. The solenoid valve of claim 22, wherein the second mounting hole (1332) includes a guide hole (13321) and a positioning hole (13322) that are connected to each other, the diameter of the positioning hole (13322) is larger than the diameter of the guide hole (13321), a second stop surface (192) is provided at the connection point between the positioning hole (13322) and the guide hole (13321), and the valve core (132) is stop-engaged with the second stop surface (192).

24. 24. The solenoid valve of claim 23, wherein the valve core (132) includes a core sleeve (1321) and an external limiting ring (1322) provided on the outer wall of the core sleeve (1321), the core sleeve (1321) having the valve chamber (11) and the valve orifice (12), wherein the core sleeve (1321) passes through the guide hole (13321), the external limiting ring (1322) is positioned in the positioning hole (13322), and the external limiting ring (1322) abuts against the second stop surface (192).

25. 25. The solenoid valve of claim 24, wherein the valve core (132) further includes a sealing ring (1323) provided on the outer wall of the core sleeve (1321), and the side wall of the core sleeve (1321) is provided with a plurality of flow holes (17) along the circumferential direction, each of the flow holes (17) communicating with the valve chamber (11), and the plurality of flow holes (17) are located between the outer limiting ring (1322) and the sealing ring (1323).

26. 23. The solenoid valve of claim 22, wherein the outer wall of the valve sleeve (20) is restrictively engaged with the inner wall of the first mounting hole (1331), and the end face of the valve sleeve (20) abuts against the bottom wall of the first mounting hole (1331).

27. 22. The solenoid valve of claim 21, wherein the valve core (132) comprises a core sleeve (1321) and an inner limiting ring (14), the core sleeve (1321) has the valve chamber (11) and the valve port (12), the inner limiting ring (14) is provided on the inner wall of the valve chamber (11), the solenoid valve further comprises a first elastic member (61), the first elastic member (61) is fitted to the spindle (30), one end of the first elastic member (61) abuts on a stepped surface of the spindle (30), and the other end of the first elastic member (61) abuts on the inner limiting ring (14).

28. 22. The solenoid valve according to claim 21, wherein the valve seat portion (10) further includes a third sealing ring (151) and a fourth sealing ring (152), wherein the valve cover (131) has an outer wall with a fourth sealing groove (162) and the fourth sealing ring (152) is disposed in the fourth sealing groove (162), the valve core (132) has an outer wall with a third sealing groove (161) and the third sealing ring (151) is disposed in the third sealing groove (161), and the valve core (132) has a side wall with a flow hole (17) communicating with the valve chamber (11), and the flow hole (17) is located between the third sealing ring (151) and the fourth sealing ring (152).

29. 22. The solenoid valve of claim 21, wherein the valve cover (131) includes a sleeve (1311) and a retaining ring (1312) provided on an outer wall of the sleeve (1311), the sleeve (1311) having the mounting chamber (133) and having an external thread.

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