Two-position three-way electromagnetic valve

Abstract

The invention relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve which comprises a valve body and a valve rod, a mounting groove, an air inlet and two air outlets are formed in the valve body, a first sealing assembly and a second sealing assembly are arranged at the two ends of the mounting groove respectively, and first communication ports are formed in the first sealing assembly and the second sealing assembly respectively; the first sealing assembly and the second sealing assembly are driven to rotate through linear motion of the valve rod, the primary sealing requirement is met through the linear motion of the valve rod, the first communicating opening rotates to form dislocation through rotation of the first sealing assembly and the second sealing assembly, secondary sealing is achieved, and the dual-guarantee effect is achieved; therefore, even if the electromagnetic valve causes tiny leakage of the primary seal due to manufacturing tolerance, long-term abrasion or temperature change, the leakage of airflow can be further prevented through the secondary seal formed by the rotation of the first sealing assembly and the second sealing assembly, so that the overall sealing performance of the two-position three-way electromagnetic valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, in particular to a two-position three-way solenoid valve. Background Art

[0002] The two-position three-way solenoid valve plays a key role in industrial automation and fluid control systems. Its unique structure and working principle make it widely used in a variety of application scenarios. The main structure of the two-position three-way solenoid valve is usually composed of an electromagnet, a valve body, a valve core, a seal, etc. Among them, the electromagnet is the core component that controls the opening and closing of the valve, the valve body carries and guides the fluid, the valve stem is responsible for switching the fluid channel, and the seal ensures the sealing of the system. The main feature of the two-position three-way solenoid valve is that the valve stem has two working positions and three channels, and the precise control of the fluid is achieved through the interaction of electromagnetic force and spring force. When the electromagnet is energized, the magnetic force generated attracts the valve stem, separates it from the valve seat, opens a specific fluid channel, and allows the medium to flow. After the power is off, the spring force resets the valve core, closes the channel and opens another channel to switch the fluid path. This design enables the two-position three-way solenoid valve to respond quickly and achieve precise control of the fluid. Although the two-position three-way solenoid valve is widely used in the industrial field, there are still problems such as insufficient sealing performance, slow response speed and poor durability. Summary of the invention

[0003] In view of the above problems, a two-position three-way solenoid valve is provided. The present invention drives the rotation of the first sealing component and the second sealing component through the linear motion of the valve stem, realizes the initial sealing requirement through the linear motion of the valve stem, and realizes the secondary sealing by the rotation of the first sealing component and the second sealing component, thereby playing a double protection role. Even if the solenoid valve has a slight leakage in the primary seal due to manufacturing tolerance, long-term wear or temperature change, the secondary seal formed by the rotation of the first sealing component and the second sealing component can further prevent the leakage of airflow, thereby improving the overall sealing performance of the two-position three-way solenoid valve.

[0004] In order to solve the problems of the prior art, the present invention provides a two-position three-way solenoid valve, comprising a valve body and a mounting groove arranged in the valve body, the mounting groove being connected to an air inlet and two air outlets on the valve body at the same time; a valve stem slidably matched with the mounting groove is arranged in the mounting groove, and a sealing portion for matching with an end of the mounting groove to form a primary seal is arranged on the valve stem; a first sealing component and a second sealing component transmission-connected to the valve stem are respectively arranged at both ends of the mounting groove, and a first connecting port is provided on the first sealing component and the second sealing component; when the sealing portion contacts the end of the mounting groove, the primary sealing of one of the air outlets is realized, and through the rotation of the first sealing component or the second sealing component, the first connecting port and the air outlet are staggered and matched to form a secondary seal.

[0005] Preferably, both ends of the valve stem are provided with sliding grooves extending along its axis, and both the first sealing assembly and the second sealing assembly are provided with connectors that are slidably engaged with the sliding grooves. When the valve stem slides along the installation groove, the connectors can be driven to move through the sliding grooves, realizing the rotation of the first sealing assembly and the second sealing assembly.

[0006] Preferably, both the first sealing assembly and the second sealing assembly are provided with second communication ports that are symmetrically distributed with respect to the first communication port.

[0007] Preferably, the sealing portion is provided in the middle of the valve stem. The sealing portion is of a cylindrical structure, and both the top and the bottom of the sealing portion are provided with inclined first steps. Both the first sealing assembly and the second sealing assembly are provided with second steps corresponding to the inclined first steps provided on the sealing portion.

[0008] Preferably, one end of the valve stem close to the valve seat is provided with an inclined third step, and a fourth step that cooperates with the third step is provided in the valve seat.

[0009] Preferably, one end of the valve stem away from the valve seat is provided with a fifth step, and the top of the first sealing assembly is provided with a sixth step that cooperates with the fifth step.

[0010] Preferably, the first sealing assembly includes a first fixing member and a first rotating member. The first fixing member is fixedly connected to the installation groove, and the first fixing member is located between the air inlet and one of the air outlets. The first rotating member is rotatably provided at one end of the first fixing member away from the valve seat, and the first rotating member is in transmission connection with the valve stem.

[0011] Preferably, the second sealing assembly includes a second fixing member and a second rotating member. The second fixing member is fixedly connected to the installation groove, and the second fixing member is located between the air inlet and one of the air outlets. The second rotating member is rotatably provided between the second fixing member and the valve seat, and the second rotating member is in transmission connection with the valve stem.

[0012] Preferably, an accommodation groove is provided inside the bottom of the valve stem, and an elastic member is provided in the accommodation groove. Both ends of the elastic member are fixedly connected to the valve body and the accommodation groove respectively.

[0013] Preferably, a moving iron core that can move in the vertical direction is provided at the top of the installation groove inside the valve body, and an installation rod fixedly connected to the moving iron core is provided on the valve stem.

[0014] The beneficial effects of the present invention compared with the prior art are: 1. The present invention drives the rotation of the first sealing assembly and the second sealing assembly through the linear motion of the valve stem. The primary sealing requirement is achieved through the linear motion of the valve stem, and the rotation of the first sealing assembly and the second sealing assembly causes the first communication port to rotate and form a dislocation to achieve secondary sealing, playing a dual-guarantee role. Even if there is a slight leakage in the primary seal due to manufacturing tolerances, long-term wear, or temperature changes in the solenoid valve, the secondary seal formed by the rotation of the first sealing assembly and the second sealing assembly can further prevent the leakage of air flow, thereby improving the overall sealing performance of the two-way three-way solenoid valve.

[0015] 2. Through the setting of the second communication port in the present invention, the distribution of gas inside the first sealing assembly and the second sealing assembly can be made more uniform. The two symmetrical first communication ports and the second communication port can achieve a more rapid pressure balance during the switching or operation of the solenoid valve, reducing local high-pressure or low-pressure areas, thereby contributing to improving the sealing stability and reducing the leakage risk.

[0016] 3. Through the setting of the first fixing member and the first rotating member in the present invention, the first fixing member is firmly connected to the installation groove, playing a role of stable positioning and support; and the first rotating member provided on the first fixing member can rotate under the driving action of the valve stem. This structure separates the fixing and moving functions, ensuring that the first sealing assembly can achieve the necessary angular adjustment through the first rotating member during the linear movement of the valve stem, so as to form a secondary seal with other components of the valve body. Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a two-way three-way solenoid valve.

[0018] Figure 2 It is a sectional structural schematic Figure 1 .

[0019] Figure 3 It is a three-dimensional sectional structural schematic Figure 1 .

[0020] Figure 4 It is a sectional structural schematic Figure 2 .

[0021] Figure 5 It is a three-dimensional sectional structural schematic Figure 2 .

[0022] Figure 6 It is Figure 2 the enlarged view of part A in

[0023] Figure 7 It is Figure 4 the enlarged view of part B in

[0024] Figure 8 The invention is a three-dimensional structural schematic diagram of a valve stem, a first sealing component and a second sealing component in a two-position three-way solenoid valve.

[0025] Figure 9 It is a three-dimensional structural diagram of the valve stem in a two-position three-way solenoid valve.

[0026] Figure 10 It is an exploded view of the valve stem, valve seat, first sealing component and second sealing component in a two-position three-way solenoid valve.

[0027] The numbers in the figure are: 1. Valve body; 11. Mounting groove; 12. Valve seat; 121. Fourth step; 13. Air inlet; 14. Air outlet; 15. First sealing assembly; 151. First connecting port; 152. Connector; 153. Second connecting port; 154. Second step; 155. Sixth step; 156. First fixing member; 157. First rotating member 16. Second sealing assembly; 161. Second fixing member; 162. Second rotating member; 2. Valve stem; 21. Sealing part; 211. First step; 22. Slide groove; 23. Third step; 24. Fifth step; 25. Accommodating groove; 251. Elastic member; 26. Moving iron core; 261. Mounting rod. DETAILED DESCRIPTION

[0028] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figures 1 to 7 and Figure 10 As shown: a two-position three-way solenoid valve comprises a valve body 1 and a mounting groove 11 arranged in the valve body 1, the mounting groove 11 is connected with an air inlet 13 and two air outlets 14 on the valve body 1 at the same time; a valve stem 2 is arranged in the mounting groove 11 to slide with it, and a sealing portion 21 is arranged on the valve stem 2 to form a primary seal with the end of the mounting groove 11; a first sealing component 15 and a second sealing component 16 which are transmission-connected to the valve stem 2 are respectively arranged at both ends of the mounting groove 11, and a first connecting port 151 is arranged on the first sealing component 15 and the second sealing component 16; when the sealing portion 21 contacts the end of the mounting groove 11, the primary sealing of one of the air outlets 14 is realized, and through the rotation of the first sealing component 15 or the second sealing component 16, the first connecting port 151 is staggeredly matched with the air outlet 14 to form a secondary seal.

[0030] When the solenoid valve is started, the valve stem 2 will slide along the mounting groove 11. At this time, the preset sealing portion 21 on the valve stem 2 will contact the end of the mounting groove 11, thereby physically forming a primary seal. At this time, the sealing portion 21 covers the slot area connected to one of the air outlets 14, thereby achieving preliminary airflow isolation.

[0031] Since the first sealing component 15 and the second sealing component 16 are both provided with the first connecting port 151, when the valve stem 2 moves, it will drive the first sealing component 15 and the second sealing component 16 connected thereto, so that the first connecting port 151 of the first sealing component 15 or the second sealing component 16 on the outlet 14 to be blocked will be misaligned with the outlet 14, thereby achieving secondary sealing. Although the outlet 14 has been sealed in the initial sealing by the above method, the first connecting port 151 is further transferred by the rotation of the first sealing component 15 or the second sealing component 16 on this basis, so that it forms a "blocking" state in alignment with the outlet 14, thereby achieving the effect of secondary sealing.

[0032] During the whole process, the linear motion of the valve stem 2 and the rotational motion of the first sealing component 15 or the second sealing component 16 are linked and coordinated. Through transmission, the rotation of the first sealing component 15 or the second sealing component 16 is ensured to be synchronized with the movement of the valve stem 2, which not only meets the primary sealing requirements, but also forms a secondary seal through dislocation, thus playing a double role of protection.

[0033] By adopting a double sealing method of primary sealing and secondary sealing, even if there is a slight leakage in the primary seal due to manufacturing tolerance, long-term wear or temperature change, the secondary seal formed by the rotation of the first sealing component 15 and the second sealing component 16 can further prevent the leakage of airflow, thereby improving the overall sealing performance of the two-position three-way solenoid valve.

[0034] Through the movement of the valve stem 2 and the coordinated rotation of the first sealing component 15 and the second sealing component 16, precise switching and sealing of the inlet and outlet channels can be achieved, the air flow distribution can be effectively controlled, and the solenoid valve can be ensured to maintain a stable working state during high-speed response and switching.

[0035] like Figures 2 to 10 As shown: both ends of the valve stem 2 are provided with a slide groove 22 extending around its axis, and the first sealing component 15 and the second sealing component 16 are provided with a connecting head 152 that slidably cooperates with the slide groove 22. When the valve stem 2 slides along the mounting groove 11, the connecting head 152 can be driven to move through the slide groove 22 to realize the rotation of the first sealing component 15 and the second sealing component 16.

[0036] When the valve stem 2 moves linearly along the installation groove 11, with the help of the sliding fit between the sliding groove 22 and the connector 152, the linear motion can be converted into the rotational motion of the first sealing assembly 15 and the second sealing assembly 16, realizing the synchronous rotation of the first sealing assembly 15 and the second sealing assembly 16. Thus, the first communication port 151 on the first sealing assembly 15 and the second sealing assembly 16 forms a misaligned occlusion state with the corresponding air outlet 14, achieving the effect of secondary sealing.

[0037] In addition, other transmission mechanisms can also be adopted in this solution. The linear motion of the valve stem 2 is converted into the rotational motion that drives the first sealing assembly 15 and the second sealing assembly 16 to rotate, such as a ball transmission mechanism. Balls are arranged between the valve stem 2 and the first sealing assembly 15 and the second sealing assembly 16, and the rolling friction is utilized to realize the conversion from linear motion to rotational motion. This method can effectively reduce the friction resistance and improve the transmission efficiency.

[0038] With the dual protection of primary sealing and secondary sealing, even if a slight leakage occurs in the primary sealing due to manufacturing tolerances, long-term wear, or temperature changes, the secondary sealing generated by the rotation of the first sealing assembly 15 or the second sealing assembly 16 can still effectively prevent air leakage, thereby greatly improving the overall sealing performance. It realizes the precise switching and sealing control between the air inlet 13 and the two air outlets 14, ensuring that the solenoid valve always maintains a stable working state during high-speed response and frequent switching.

[0039] Through the transmission of the built-in sliding groove 22 or other linear-rotation conversion mechanisms, the complex structure that originally required multiple individual seals can be integrated into one, thus simplifying the assembly process, improving product consistency, and helping to reduce the manufacturing cost.

[0040] As Figures 8 to 10 shown: Second communication ports 153 that are symmetrically distributed with respect to the first communication port 151 are provided on both the first sealing assembly 15 and the second sealing assembly 16.

[0041] Through the setting of the second communication ports 153, the distribution of gas inside the first sealing assembly 15 and the second sealing assembly 16 can be made more uniform. The two symmetrical first communication ports 151 and second communication ports 153 can achieve a more rapid pressure balance during the switching or operation of the solenoid valve, reducing local high-pressure or low-pressure areas, thereby helping to improve the sealing stability and reduce the leakage risk.

[0042] The symmetrically distributed second communication port 153 and the first communication port 151 cooperate with each other, which can further compensate for the possible tiny errors in the primary seal, making it easier to effectively block the airflow during the secondary seal and effectively accelerating the response speed of the solenoid valve. This double-seal structure can maintain a good sealing state under high-frequency operation and can provide additional sealing protection even under manufacturing tolerances or long-term wear.

[0043] The arrangement of the symmetric second communication port 153 and the first communication port 151 not only makes the internal gas flow path more reasonable, but also reduces the vibration or eccentricity problems caused by asymmetric airflow, thereby improving the overall structural stability and long-term use reliability of the solenoid valve.

[0044] As Figures 2 to 10 shown: The sealing part 21 is arranged in the middle of the valve stem 2. The sealing part 21 is of a cylindrical structure. Both the top and bottom of the sealing part 21 are provided with inclined first steps 211. The first sealing assembly 15 and the second sealing assembly 16 are both provided with second steps 154 corresponding to the inclined first steps 211 provided on the sealing part 21.

[0045] The sealing part 21 adopts a cylindrical structure, and both its top and bottom are provided with inclined first steps 211, which can form a large and uniform sealing surface when the sealing part 21 contacts the end of the valve body 1, improving the joint tightness between the sealing part 21 and the groove wall. The inclined first steps 211 help to guide the fluid pressure distribution and reduce the leakage risk caused by uneven local pressure.

[0046] The setting of the first steps 211 can effectively guide the first sealing assembly 15 and the second sealing assembly 16 to rotate and cooperate during the movement of the valve stem 2. After the primary seal is formed, the first sealing assembly 15 and the second sealing assembly 16 realize the relative displacement of the first communication port 151 through matching with the first steps 211 of the sealing part 21 during movement, forming a secondary seal effect, thus double-guaranteeing the sealing performance. Even if the primary seal leaks slightly due to wear or manufacturing tolerances, it can be compensated by the secondary seal.

[0047] As Figures 2 to 10 shown: An inclined third step 23 is provided at one end of the valve stem 2 close to the valve seat 12, and a fourth step 121 that cooperates with the third step 23 is provided in the valve seat 12.

[0048] Through the mutual cooperation of the inclined third step 23 provided at one end of the valve stem 2 close to the valve seat 12 and the fourth step 121 in the valve seat 12, stable mechanical limit and guidance can be formed during the movement of the valve stem 2, ensuring that the valve stem 2 is always in a predetermined position during the switching process and preventing seal failure or malfunction caused by deviation.

[0049] The stepped structure forms a set of continuous stepped surfaces at the contact part between the valve stem 2 and the valve seat 12. Through the inclined angle, the seal can be in a pre-loaded state when contacting, thus ensuring a tight combination between the sealing surfaces and effectively reducing the leakage risk caused by manufacturing tolerances or wear. The cooperation between the third step 23 and the fourth step 121 can compensate for the small movement errors between the valve stem 2 and the valve seat 12 to a certain extent, reduce the relative displacement caused by vibration or temperature changes, and improve the overall working stability and durability of the solenoid valve.

[0050] As Figures 2 to 10 shown: At one end of the valve stem 2 away from the valve seat 12, a fifth step 24 is provided, and at the top of the first sealing assembly 15, a sixth step 155 that cooperates with the fifth step 24 is provided.

[0051] Through the settings of the fifth step 24 and the sixth step 155, a clear mechanical engagement interface can be formed between the valve stem 2 and the first sealing assembly 15. This engagement structure not only helps to ensure that the first sealing assembly 15 obtains a stable and accurate rotational movement during the linear movement of the valve stem 2, but also precisely locates the switching position of the secondary seal, ensuring the repeatability and reliability of the sealing effect.

[0052] The cooperation between the fifth step 24 and the sixth step 155 can form a relatively fixed contact structure when the first sealing assembly 15 rotates, thereby further optimizing the contact state between the first sealing assembly 15 and the valve body 1. It helps to reduce the leakage risk caused by possible small deviations during movement, thus achieving a more stringent secondary sealing effect on the basis of the primary seal. Extend the overall life of the solenoid valve and maintain long-term stable sealing performance.

[0053] As Figures 2 to 10 shown: The first sealing assembly 15 includes a first fixing member 156 and a first rotating member 157. The first fixing member 156 is fixedly connected to the mounting groove 11, and the first fixing member 156 is located between the air inlet 13 and one of the air outlets 14. The first rotating member 157 is rotatably arranged at one end of the first fixing member 156 away from the valve seat 12, and the first rotating member 157 is in transmission connection with the valve stem 2.

[0054] By setting the first fixing member 156 and the first rotating member 157, the first fixing member 156 is firmly connected to the mounting groove 11, which plays a role of stable positioning and support; and the first rotating member 157 arranged on the first fixing member 156 can be rotated under the transmission of the valve stem 2. This structure separates the fixing and movement functions, ensuring that the first sealing component 15 can achieve the necessary angle adjustment through the first rotating member 157 during the linear movement of the valve stem 2, thereby forming a secondary seal with other parts of the valve body 1. Even if there may be a slight leakage in the initial seal, the rotation adjustment of the first rotating member 157 can also enable the sealing interface to be aligned, thereby further enhancing the secondary sealing effect. This graded sealing setting provides double protection for the solenoid valve, effectively reducing the risk of leakage caused by wear or tolerance.

[0055] like Figures 2 to 10 As shown: the second sealing assembly 16 includes a second fixed member 161 and a second rotating member 162, the second fixed member 161 is fixedly connected to the mounting groove 11, and the second fixed member 161 is located between the air inlet 13 and one of the air outlets 14, the second rotating member 162 is rotatably arranged between the second fixed member 161 and the valve seat 12, and the second rotating member 162 is transmission-connected to the valve stem 2.

[0056] Since the second fixing member 161 is fixed to the mounting groove 11 and is located between the air inlet 13 and a certain air outlet 14, it is ensured that the second sealing assembly 16 is in a key sealing position in the entire valve body 1 structure. When the valve stem 2 moves, the second rotating member 162 can rotate synchronously through the transmission connection with the valve stem 2 and form a precise contact with the valve seat 12, ensuring the accurate alignment of the sealing interface, thereby achieving efficient secondary sealing.

[0057] The second rotating member 162 is located between the second fixed member 161 and the valve seat 12, and its rotation can adjust the sealing state, so that the airflow switching between the air inlet 13 and the air outlet 14 is smoother during the movement of the valve stem 2. This method not only effectively cuts off the unnecessary airflow, but also ensures the reasonable distribution of gas circulation, thereby improving the overall fluid control performance of the solenoid valve.

[0058] Even if there is a slight leakage in the initial seal, the rotation of the second rotating member 162 and its cooperation with the valve seat 12 can further block the leakage channel, thereby achieving double sealing protection and significantly improving the sealing reliability of the solenoid valve system.

[0059] Since the second rotating member 162 is directly connected to the valve stem 2, its rotational movement can respond to the displacement change of the valve stem 2 in a timely manner. This dynamic response capability helps to reduce the risk of sealing failure caused by factors such as vibration and temperature changes, thereby improving the stability and durability of the entire solenoid valve system.

[0060] likeFigures 2 to 6 and Figure 9 As shown, a receiving groove 25 is provided inside the bottom of the valve stem 2, and an elastic member 251 is provided in the receiving groove 25. Two ends of the elastic member 251 are fixedly connected to the valve body 1 and the receiving groove 25 respectively.

[0061] By setting the accommodating groove 25 and the elastic member 251, a built-in valve stem 2 buffer system is formed, which can effectively absorb vibration and impact, reduce the mechanical stress caused by movement or external disturbance, thereby protecting the valve stem 2 and related seals and extending the service life of the solenoid valve.

[0062] The flexibility of the elastic member 251 can automatically compensate for slight gap changes caused by processing tolerances or assembly errors, ensuring that the first sealing component 15 and the second sealing component 16 always maintain a good contact state during operation, thereby improving the sealing effect and reducing the risk of leakage.

[0063] After the valve stem 2 is actuated, the elastic member 251 can quickly return to its original state and reset the valve stem 2 to a predetermined position, which helps to achieve fast and accurate cycle operation and meet the response application requirements of the solenoid valve.

[0064] like Figures 2 to 5 As shown: a moving iron core 26 that can move in the vertical direction is arranged at the top of the installation groove 11 in the valve body 1, and a mounting rod 261 fixedly connected to the moving iron core 26 is arranged on the valve stem 2.

[0065] The arrangement of the moving iron core 26 and the mounting rod 261 ensures that the linear motion of the moving iron core 26 can be accurately transmitted to the valve stem 2, achieving accurate motion guidance and ensuring close coordination and motion coordination between the various components. The moving iron core 26 is usually used to receive the magnetic force generated by the electromagnetic coil, and its vertical movement in conjunction with the transmission of the mounting rod 261 can achieve fast and stable switching action, thereby playing a key role in the sealing conversion of the electromagnetic valve and improving the response speed of the electromagnetic valve and the accuracy of the sealing conversion.

[0066] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A two-position three-way solenoid valve, comprising a valve body and a mounting groove arranged in the valve body, wherein the mounting groove is connected to an air inlet and two air outlets on the valve body at the same time; characterized in that: A valve stem is provided in the installation groove and is slidably matched therewith, and a sealing portion is provided on the valve stem and is used to cooperate with the end of the installation groove to form a primary seal; A first sealing component and a second sealing component are respectively provided at both ends of the installation groove and are connected to the valve stem in a transmission manner. The first sealing component and the second sealing component are both provided with a first communication port. When the sealing portion contacts the end of the mounting groove, the primary sealing of one of the air outlets is achieved, and the first communication port and the air outlet are misaligned to form a secondary seal by rotating the first sealing component or the second sealing component; Both ends of the valve stem are provided with a slide groove extending around its axis, and the first sealing component and the second sealing component are provided with a connecting head that slides with the slide groove. When the valve stem slides along the installation groove, the connecting head can be driven to move through the slide groove to realize the rotation of the first sealing component and the second sealing component.

2. The two-position three-way solenoid valve according to claim 1, characterized in that: The first sealing assembly and the second sealing assembly are both provided with second communication openings which are symmetrically distributed with respect to the first communication openings.

3. The two-position three-way solenoid valve according to claim 1, characterized in that: The sealing part is arranged in the middle of the valve stem, and the sealing part is a cylindrical structure. The top and bottom of the sealing part are both provided with an inclined first step. The first sealing assembly and the second sealing assembly are both provided with a second step corresponding to the inclined first step of the sealing part.

4. The two-position three-way solenoid valve according to claim 1, characterized in that: An inclined third step is arranged at one end of the valve stem close to the valve seat, and a fourth step cooperating with the third step is arranged in the valve seat.

5. The two-position three-way solenoid valve according to claim 1, characterized in that: A fifth step is arranged on one end of the valve stem away from the valve seat, and a sixth step cooperating with the fifth step is arranged on the top of the first sealing component.

6. The two-position three-way solenoid valve according to claim 1, characterized in that: The first sealing assembly includes a first fixed member and a first rotating member. The first fixed member is fixedly connected to the mounting groove and is located between the air inlet and one of the air outlets. The first rotating member is rotatably arranged on an end of the first fixed member away from the valve seat, and the first rotating member is transmission-connected to the valve stem.

7. The two-position three-way solenoid valve according to claim 1, characterized in that: The second sealing assembly includes a second fixed member and a second rotating member. The second fixed member is fixedly connected to the mounting groove and is located between the air inlet and one of the air outlets. The second rotating member is rotatably arranged between the second fixed member and the valve seat, and the second rotating member is transmission-connected to the valve stem.

8. The two-position three-way solenoid valve according to claim 1, characterized in that: A receiving groove is arranged inside the bottom of the valve stem, an elastic member is arranged in the receiving groove, and two ends of the elastic member are fixedly connected to the valve body and the receiving groove respectively.

9. The two-position three-way solenoid valve according to claim 1, characterized in that: A moving iron core which can move in a vertical direction is arranged at the top of the installation groove in the valve body, and a mounting rod which is fixedly connected with the moving iron core is arranged on the valve stem.

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