Two-position three-way electromagnetic valve integrated with one-way valve

Abstract

The utility model discloses two -way three -way solenoid valve of integrated one -way valve component, including first valve body and second valve body, and first valve body includes import, export and valve cavity, is equipped with first valve port in the valve cavity, second valve body includes on -off module, and on -off module includes electromagnetic assembly and one -way valve component, wherein, electromagnetic assembly includes electromagnetic coil, core pipe and magnetic core, and electromagnetic assembly on -off electricity control first valve port's opening and closing, and one -way valve component includes valve sleeve and check piece, and the one -way flow channel is arranged between valve sleeve exhaust port and exhaust port, and check piece sets up in one -way flow channel, and according to the pressure in -line of one -way flow channel, exhaust port is conducted or closed. The utility model discloses two -way three -way solenoid valve, integrated electromagnetic assembly and one -way valve component, through above -mentioned electromagnetic force drive, mechanical limit and the synergies of fluid pressure balance, realize the accurate control and prevent reverse flow of water flow and steam path.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more particularly to a two-position three-way solenoid valve used in a coffee machine. Background Technology

[0002] In traditional small, compact equipment such as coffee machines where space is limited, two-position three-way solenoid valves and check valves are often used together to control different channels and prevent backflow. As independent components, they need to be connected by additional pipelines, resulting in a redundant and complex system structure. This separate design has many pipeline joints, which increases the risk of sealing failure at the joints. Furthermore, since the solenoid valve and check valve are independent of each other, their response speed and control logic may differ, which can easily lead to fluid pressure fluctuations and unstable flow, becoming potential leakage hazards that affect the equipment's lifespan and safety. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a two-position three-way solenoid valve with integrated one-way valve components, which can accurately control the water flow and steam path while preventing backflow.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A two-position three-way solenoid valve with an integrated one-way valve component includes a first valve body and a second valve body. The first valve body includes an inlet, an outlet, and a valve cavity, with the valve cavity disposed between the inlet and the outlet, and a first valve port provided within the valve cavity. The second valve body includes an on / off module, which includes an electromagnetic component and a one-way valve component. The electromagnetic component includes an electromagnetic coil, a core tube, and a magnetic core. The electromagnetic coil surrounds the core tube, which is connected to the valve cavity. The core tube surrounds the magnetic core, and the magnetic core is positioned at a first position and a second position within the core tube as the electromagnetic coil is energized and de-energized. The reciprocating motion between the two valves controls the opening and closing of the first valve port; the one-way valve component includes a valve sleeve and a check valve. One end of the valve sleeve is provided with an exhaust port, and the other end of the valve sleeve is connected to the core tube. The other end of the valve sleeve is provided with a second valve port. A gap is provided between the second valve port and the magnetic core. When the magnetic core moves to the second position, the magnetic core contacts the second valve port to close the second valve port. A one-way flow channel is provided between the exhaust port and the exhaust port. The check valve is provided in the one-way flow channel. The check valve opens or closes the exhaust port as the pressure in the one-way flow channel changes.

[0006] Furthermore, the first valve port, core tube, magnetic core, electromagnetic coil, valve sleeve, and check valve are coaxially arranged.

[0007] Furthermore, the core tube is snapped into the valve cavity, and a sealing element is provided at the bottom of the core tube to seal the valve cavity.

[0008] Furthermore, a bayonet is provided on the inner side of the valve cavity, a retaining spring is attached to the bayonet, and a retaining arm is provided on the retaining spring. The retaining arm extends from the bayonet into the valve cavity and fits against the outer side of the core tube.

[0009] Furthermore, a limiting cavity is provided on the inner side of the core tube, and a groove is provided on the outer side of the magnetic core. A reset spring is sleeved on the groove. When the magnetic core moves to the second position, the reset spring abuts against the top of the limiting cavity.

[0010] Furthermore, the magnetic core is provided with a first pad, a spring, and a second pad from top to bottom inside. The first pad and the second pad are interference-fitted with the inner side of the magnetic core. The first pad faces the first valve port and is used to seal the first valve port when the magnetic core moves to the first position. The second pad faces the valve sleeve and is used to seal the second valve port when the magnetic core moves to the second position. The spring connects the first pad and the second pad.

[0011] Furthermore, an exhaust connector is provided on the upper outer side of the valve sleeve, the valve sleeve is screwed to the exhaust connector, a sealing ring is provided between the top outer side of the valve sleeve and the exhaust connector, a sleeve step is provided in the middle of the valve sleeve, the lower part of the valve sleeve is sleeved with the core tube, and the end of the core tube contacts the sleeve step.

[0012] Furthermore, the unidirectional flow channel is a multi-stage circular step structure that gradually expands radially, and the multi-stage circular step structure includes a check step.

[0013] Furthermore, the check valve includes a check block and a check spring. The check block is fixed to one end of the check spring. The check block moves away from or against the check step as the pressure in the one-way flow channel changes. The other end of the check spring abuts against the exhaust connector.

[0014] Furthermore, the check block is configured as an inverted umbrella-shaped structure.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model relates to a two-position three-way solenoid valve. The solenoid valve utilizes an electromagnetic component to generate a magnetic field that controls the movement of a magnetic core, thereby controlling the opening and closing of the inlet and outlet. A one-way valve component is integrated within the solenoid valve. By optimizing the magnetic core's movement trajectory and the design of the check valve, the efficient and precise collaborative operation of the electromagnetic component and the one-way valve component is achieved. The electromagnetic coil's switching on and off rapidly drives the magnetic core to control the opening and closing of the first valve port. Simultaneously, the check valve automatically opens or closes the exhaust port based on the pressure within the one-way flow channel, ensuring precise control of fluid flow direction and improving system response speed and control accuracy. In other words, the built-in one-way valve component operates independently of the electromagnetic control, independently controlling the opening and closing of the one-way flow channel, enabling timely steam discharge and preventing backflow. Therefore, this design, through the integration of the electromagnetic component and the one-way valve component, makes the solenoid valve more versatile. It can achieve the basic on / off function of a two-position three-way solenoid valve while also using the one-way valve component to prevent fluid backflow, making it suitable for more complex fluid control scenarios.

[0017] 2. The integration of one-way valve components simplifies the system structure, reduces the number of components and installation procedures, lowers installation and maintenance costs, and at the same time reduces pipeline connection points, reduces leakage risk, and improves system reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the solenoid valve of this utility model;

[0020] Figure 2 This is a schematic diagram of the first valve body structure in this utility model;

[0021] Figure 3 This is a schematic diagram of the snap ring structure in this utility model;

[0022] Figure 4 This is a schematic diagram of the magnetic core structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the single-phase valve component structure in this utility model;

[0024] Figure 6 This is a schematic diagram of the valve sleeve structure in this utility model. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "upper," "lower," "first," "second," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] See Figure 1 An embodiment of a two-position three-way solenoid valve with an integrated one-way valve component is disclosed. The solenoid valve includes a first valve body 100 and a second valve body 200. The first valve body 100 has an inlet 110, an outlet 120, and a valve cavity 130. The valve cavity 130 is located between the inlet 110 and the outlet 120, and a first valve port 131 is provided within the valve cavity 130. The second valve body 200 includes an on / off module 220, which includes an electromagnetic component 221 and a one-way valve component 222. The electromagnetic component 221 includes an electromagnetic coil 221a, a core tube 221b, and a magnetic core 221c. The electromagnetic coil 221a surrounds the core tube 221b, which is connected to the valve cavity 130. The core tube 221b surrounds the magnetic core 221c, and the magnetic core 221c moves to a first position within the core tube 221b as the electromagnetic coil 221a is energized and de-energized. The valve moves back and forth between the first and second positions to control the opening and closing of the first valve port 131. The one-way valve component 222 includes a valve sleeve 222a and a check valve 222b. One end of the valve sleeve 222a is provided with an exhaust port 210, and the other end of the valve sleeve 222a is connected to the core tube 221b. The other end of the valve sleeve 222a is provided with a second valve port 222aa. A gap is provided between the second valve port 222aa and the magnetic core 221c. When the magnetic core 221c moves to the second position, the magnetic core contacts the second valve port 222aa, and the second valve port 222aa is closed. A one-way flow channel 222ab is provided between the second valve port 222aa and the exhaust port 210. The check valve 222b is provided in the one-way flow channel 222ab. The check valve 222b opens or closes the exhaust port 210 as the pressure in the one-way flow channel 222ab changes.

[0028] It should be noted that the solenoid valve integrates a one-way valve component 222. By switching the solenoid coil 221a on and off, a magnetic field is generated in the core tube 221b. Under the action of the magnetic field, the magnetic core 221c can move between the first position and the second position in the core tube 221b. When the magnetic core 221c is in the first position, it contacts the first valve port 131, blocking the connection between the inlet 110 and the outlet 120. At this time, there is a gap between the magnetic core 221c and the second valve port 222aa, meaning that the outlet 120 and the second valve port 222aa are in a conductive state. Fluid can flow from the outlet 120 into the one-way flow channel 222ab through the second valve port 222aa. When the pressure inside the valve exceeds the threshold (the pressure on the front of the check element 222b is greater than the pressure on the back), the check element 222b is pushed open, and the fluid is discharged through the one-way flow channel 222ab to the exhaust port 210. After the pressure drops, the check element 222b resets, closing the one-way flow channel 222ab and maintaining the pressure inside the valve. When the magnetic core 221c moves to the second position, the magnetic core 221c leaves the first valve port 131, realizing the connection between the inlet 110 and the outlet 120. At this time, the magnetic core 221c presses against the second valve port 222aa to close it. This blocks the connection between outlet 120 and exhaust port 210.

[0029] The following example uses the application of this solenoid valve in a coffee machine to illustrate how to control water flow and steam emission in stages to automate the coffee extraction process. The working process is as follows:

[0030] The inlet 110 connects to the coffee machine's water supply system (such as the water pump outlet 120 or the water tank), the outlet 120 connects to the brewing chamber, and the exhaust port 210 is used to discharge steam or waste liquid from the brewing chamber.

[0031] In the initial state (electromagnetic coil 221a is de-energized), magnetic core 221c is in the first position and in contact with the first valve port 131. At this time, the inlet 110 and outlet 120 flow channels are closed, and the one-way flow channel 222ab is closed by the check valve 222b.

[0032] During the water inlet and brewing stage, the electromagnetic coil 221a is energized to generate an axial magnetic field. The magnetic core 221c, acting as a moving iron core, is subjected to magnetic force in the magnetic field and moves axially within the core tube 221b, moving from the first position to the second position, thereby opening the first valve port 131. At this time, the liquid flows from the inlet 110 to the first valve port 131, enters the valve chamber 130, and then flows to the outlet 120 to enter the brewing chamber for heating and brewing. During the brewing process, the electromagnetic coil 221a remains energized, and the water in the brewing chamber comes into contact with the coffee powder, generating steam pressure. (The last sentence appears to be incomplete and possibly refers to a cleaning process.) When steam is being released, the solenoid coil 221a is de-energized, the magnetic core 221c returns to the first position, the first valve port 131 closes, and the outlet 120 and the second valve port 222aa are connected. When the liquid or steam pressure exceeds a predetermined threshold, the check valve 222b pushes up to open the one-way flow channel 222ab, and the fluid is discharged from the exhaust port 210 through the one-way flow channel 222ab until the pressure drops to the set threshold. Then, the check valve 222b resets, and the one-way flow channel 222ab closes, preventing backflow at the exhaust port 210 and causing contamination in the brewing chamber. In other words, through the synergistic action of the solenoid component 221 and the one-way valve component 222, this solenoid valve can precisely control the switching of water flow and steam path within the coffee machine and effectively prevent backflow.

[0033] The two-position three-way solenoid valve of this utility model integrates an electromagnetic component 221 and a one-way valve component 222 to achieve the synergistic effect of electromagnetic force drive, mechanical limit and fluid pressure balance, so as to achieve precise control of water flow and steam path and prevent backflow. This invention utilizes an electromagnetic component 221 to generate a magnetic field that controls the movement of a magnetic core 221c to control the opening and closing of the main channels (inlet 110 and outlet 120). Furthermore, the electromagnetic component 221 is tightly integrated with the one-way valve component 222. By optimizing the movement trajectory of the magnetic core 221c and the design of the check valve 222b, the efficiency and precision of their coordinated operation are achieved. The switching on and off of the electromagnetic coil 221a rapidly drives the magnetic core 221c to control the opening and closing of the first valve port 131. Simultaneously, the check valve 222b automatically opens or closes the exhaust port 210 based on the pressure within the one-way flow channel 222ab, ensuring precise control of fluid flow direction and improving system response speed and control accuracy. In other words, the one-way valve component 222 independently controls the opening and closing of the one-way flow channel 222ab, independent of electromagnetic control, enabling timely steam discharge and preventing backflow. Therefore, this design makes the solenoid valve more versatile, achieving both the basic on / off function of a two-position three-way solenoid valve and preventing fluid backflow using the one-way valve component 222, making it suitable for more complex fluid control scenarios. In addition, the integration of the one-way valve component 222 simplifies the system structure, reduces the number of components and installation procedures, lowers installation and maintenance costs, and at the same time reduces pipeline connection points, reduces leakage risk, and improves system reliability.

[0034] In specific implementation, such as Figure 1The first valve port 131, core tube 221b, magnetic core 221c, electromagnetic coil 221a, valve sleeve 222a, and check element 222b are coaxially arranged.

[0035] It should be noted that, in terms of fluid performance control, the above-mentioned coaxial design is beneficial for optimizing flow resistance. This design forms an axial straight flow channel, which reduces flow resistance compared to the traditional eccentric layout. It can adapt to the high-flow extraction requirements of coffee machines. The fluid flows symmetrically along the axis, avoiding local pressure fluctuations caused by uneven flow velocity distribution in the eccentric layout. On the other hand, it is beneficial to improve sealing reliability. With the coaxial design, during valve operation, each sealing surface is concentric along the axis, which is conducive to precise centering and sealing.

[0036] In addition, the coaxial layout eliminates the radial redundancy caused by the eccentric design of traditional two-position three-way solenoid valves, reducing the overall size of the solenoid valve and making it suitable for small household appliances with limited space, such as coffee machines. Furthermore, the components are stacked along the same axis, which facilitates rapid assembly.

[0037] See Figure 2 , Figure 3 , Figure 4 To further maintain the axial and radial positioning of the core tube 221b and the valve cavity 130, the core tube 221b and the valve cavity 130 are connected by a snap-fit ​​mechanism. A seal is provided at the bottom of the core tube 221b to seal with the valve cavity 130. In this embodiment, a snap-fit ​​132 is provided inside the valve cavity 130, and a retaining spring 300 is attached to the snap-fit ​​132. The retaining spring 300 has a retaining arm 310, which extends from the snap-fit ​​132 into the valve cavity 130 and fits against the outside of the core tube 221b. Compared to the threaded connection between the core tube 221b and the valve seat in traditional solenoid valves, this reduces centering deviation and minimizes wear on the sealing surface caused by eccentricity. Figure 3 As shown, in this specific implementation, the retaining spring 300 is provided with three retaining arms 310, two of which are opposite each other, and the three retaining arms 310 have an arc-shaped surface on the side facing the core tube 221b. In this way, the three arc-shaped surfaces form multi-point contact with the outer side of the core tube 221b, which can better resist radial sway caused by steam turbulence or pipe vibration, and at the same time disperse the concentrated stress to the three arc-shaped surfaces, so as to avoid the retaining spring 300 from local deformation during use, which may affect the positioning stability of the core tube 221b.

[0038] To further limit the travel distance of the magnetic core 221c, see [link to relevant documentation]. Figure 4A limiting cavity 221bb is provided inside the core tube 221b, and a groove 221ca is provided on the outside of the magnetic core 221c. A return spring 221cb is sleeved on the groove 221ca. When the magnetic core 221c moves to the second position, the return spring 221cb abuts against the top of the limiting cavity 221bb. In this way, through the cooperation of the return spring 221cb and the limiting cavity 221bb, the installation position of the magnetic core 221c in the core tube 221b is limited. On the one hand, the return spring 221cb dynamically guides the magnetic core 221c, suppressing the radial wobble of the magnetic core 221c during movement. On the other hand, it limits the extreme position of the magnetic core 221c in the second position, preventing the return spring 221cb from blocking the second valve port 222aa.

[0039] The magnetic core 221c has a first pad 221cc, a spring 221cd, and a second pad 221ce arranged from top to bottom inside. The first pad 221cc and the second pad 221ce are interference-fitted with the inner side of the magnetic core 221c. The first pad 221cc faces the first valve port 131. When the magnetic core 221c moves to the first position, it seals the first valve port 131. The second pad 221ce faces the valve sleeve 222a. When the magnetic core 221c moves to the second position, it seals the second valve port 222aa. The spring 221cd connects the first pad 221cc and the second pad 221ce.

[0040] It should be noted that, with this design, the interference fit between the pads 221cc and 221ce and the inner side of the magnetic core 221c restricts the radial degree of freedom of the spring 221cd. This structure allows for axial elastic deformation through the cooperation of the two pads 221cc and 221ce and the spring 221cd, buffering the transient impact that the electromagnetic force may cause on the first valve port 131 and valve sleeve 222a when the electromagnetic coil is switched on and off. On the other hand, the spring 221cd provides dynamic compensation for the changes of the two pads 221cc and 221ce. During high-frequency use, the two pads 221cc and 221ce may wear due to friction or deform due to expansion differences. The spring 221cd can maintain the continuous contact between the two pads 221cc and 221ce and the inner wall of the magnetic core 221c through adaptive changes in preload, eliminating the risk of fluid leakage caused by increased gaps.

[0041] See Figure 5 , Figure 6 The valve sleeve 222a has an exhaust connector 230 on the upper outer side. The valve sleeve 222a is screwed to the exhaust connector 230. A sealing ring 240 is provided between the top outer side of the valve sleeve 222a and the exhaust connector 230. The valve sleeve 222a has a sleeve step 222aa in the middle. The lower part of the valve sleeve 222a is sleeved with the core tube 221b. The end of the core tube 221b contacts the sleeve step 222aa.

[0042] It should be noted that the upper part of the valve sleeve 222a is threadedly connected to the exhaust connector 230, ensuring a firm connection and effectively reducing the risk of leakage. This connection method facilitates installation and disassembly, and can effectively improve assembly and maintenance efficiency. A sealing ring 240 is fitted on the outer side of the thread top, which fits tightly with the inner side of the exhaust connector 230, compensating for the small gaps at the threaded connection and preventing media leakage. In other words, the sealing ring 240 and the threaded connection together form a double sealing barrier. The valve sleeve 222a has a sleeve step 222aa in the middle. When the valve sleeve 222a is sleeved with the core tube 221b, the end of the core tube 221b contacts the sleeve step 222aa, forming a clear positioning reference. This ensures the coaxiality of the valve sleeve 222a and the core tube 221b, reducing wear and leakage caused by eccentricity. At the same time, the sleeve step 222aa also provides axial support for the core tube 221b, preventing the core tube 221b from axially moving under high pressure, thereby maintaining the overall stable operation of the solenoid valve.

[0043] To further maintain the stability of the flow within the valve sleeve 222a and its unidirectional flow function, the unidirectional flow channel 222ab within the valve sleeve 222a is configured as a multi-stage circular step structure that gradually expands radially. The multi-stage circular step structure includes a check step. The check element 222b includes a check block 222ba and a check spring 222bb. The check block 222ba is fixed to one end of the check spring 222bb. The check block 222ba moves away from or against the check step as the pressure within the unidirectional flow channel 222ab changes. The other end of the check spring 222bb abuts against the exhaust connector 230.

[0044] It should be noted that the gradually expanding stepped structure creates a multi-stage throttling effect, distributing the total pressure drop of the high-pressure fluid across each step. This avoids cavitation caused by excessive pressure drop in a single stage. This structure causes the fluid pressure to gradually decrease as it passes through the valve sleeve 222a, reducing erosion damage to the inner wall of the valve sleeve 222a and the check valve 222b, thus extending the service life of the one-way valve. Simultaneously, as the fluid flows through the gradually expanding multi-stage circular stepped structure, the pressure gradient changes smoothly along the axial direction, avoiding turbulent excitation and vibration fatigue caused by abrupt changes in the cross-sectional area of ​​the flow channel. In other words, this structure makes the fluid flow more stable, reducing the impact and wear on the sealing surface of the check valve 222ba caused by fluid turbulence and vibration. Furthermore, the multi-stage throttling effect reduces the fluid velocity and impact force, further reducing the burden on the sealing surface of the check valve 222ba and extending its service life.

[0045] The working principle of the one-way valve is explained as follows: When steam from outlet 120 flows into the one-way flow channel through the second valve port 222aa, the check spring 222bb and check block 222ba, through the synergistic action of pressure drive, elastic balance, and dynamic sealing, achieve one-way steam discharge and prevent backflow. That is to say, when the positive pressure of check block 222ba exceeds the sum of the back pressure of check block 222ba and the preload of check spring 222bb, check block 222ba compresses check spring 222bb and pushes upward to achieve pressure balance. At this time, the one-way flow channel 222ab and exhaust connector 230 are connected, and steam is discharged. When the pressure inside the valve decreases, check spring 222bb returns to its original position as the pressure decreases, and check block 222ba moves toward the limit step until the back pressure of check block 222ba equals the sum of the back pressure of check block 222ba and the preload of check spring 222bb. At this time, check block 222ba contacts the limit step and seals, preventing steam or liquid backflow.

[0046] like Figure 5 As shown, to achieve better backflow prevention, the check block 222ba is designed with an inverted umbrella-shaped structure. For example... Figure 5 The inverted umbrella-shaped check block 222ba has a conical surface facing the check step. The conical surface can disperse the fluid velocity gradient, reduce local negative pressure, reduce the generation of cavitation bubbles, and extend the sealing life. Moreover, the conical surface can form a line contact seal with the limiting step, improving the sealing performance. In addition, the conical surface is also conducive to the automatic centering of the check block 222ba when it is reset.

[0047] To further improve the stability of the electromagnetic components, the second valve body is also provided with a coil frame 223 and a fixing frame 224. The inner side of the coil frame 223 is surrounded by a core tube 221b and a valve sleeve 222a, and the outer side of the coil frame 223 is wound with an electromagnetic coil 221a. The fixing frame 224 includes a first fixing part 224a, a second fixing part 224b, and a connecting part 224c connecting the first and second fixing parts. The first fixing part 224a is located above the coil frame 223 and is pressed against the exhaust connector 230. A sealing element 225 is provided between the first fixing part 224a and the exhaust connector 230. The second fixing part 224b is sleeved below the coil frame 223 and sleeved on the core tube 221b and is interference-fitted with the core tube 221b. A terminal 226 is connected to the connecting part 224c and is connected to the electromagnetic coil 221a.

[0048] It should be noted that the inner side of the coil frame 223 tightly surrounds the core tube 221b and valve sleeve 222a, forming a rigid support structure to prevent the electromagnetic coil 221a from shifting or loosening due to vibration or thermal expansion during high-frequency switching, ensuring the accuracy of the movement trajectory of the magnetic core 221c. The second fixing part 224b is fitted onto the core tube 221b with an interference fit to prevent loosening due to vibration or thermal expansion and contraction. The first fixing part 224a presses against the exhaust connector 230, and a seal is embedded between the first fixing part 224a and the exhaust connector 230. Thus, the fixing frame 224 eliminates the axial movement of the coil frame 223 through bidirectional fixing from top to bottom. At the same time, the fixing frame 224 and the coil frame 223 work together to prevent the electromagnetic components from lateral swaying due to the movement of the magnetic core 221c. The overall structure forms a composite structure of dynamic sealing (adaptive pressure adjustment with the movement of the exhaust connector 230) and static sealing (fixing by the fixing frame 224), adapting to the high-frequency opening and closing requirements of the exhaust port 210.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A two-position three-way solenoid valve with integrated one-way valve element, comprising a first valve body and a second valve body, characterized in that, The first valve body includes an inlet, an outlet, and a valve chamber, the valve chamber being disposed between the inlet and the outlet, and a first valve port being provided within the valve chamber; the second valve body includes an on / off module, the on / off module including an electromagnetic component and a one-way valve component, wherein... The electromagnetic component includes an electromagnetic coil, a core tube, and a magnetic core. The electromagnetic coil surrounds the core tube, which is connected to the valve cavity. The core tube surrounds the magnetic core, and the magnetic core reciprocates between a first position and a second position within the core tube as the electromagnetic coil is energized and de-energized to control the opening and closing of the first valve port. The one-way valve component includes a valve sleeve and a check valve. One end of the valve sleeve is provided with an exhaust port, and the other end of the valve sleeve is connected to the core tube. The other end of the valve sleeve is provided with a second valve port. A gap is provided between the second valve port and the magnetic core. When the magnetic core moves to the second position, the magnetic core contacts the second valve port to close the second valve port. A one-way flow channel is provided between the exhaust port and the exhaust port. The check valve is provided in the one-way flow channel. The check valve opens or closes the exhaust port as the pressure in the one-way flow channel changes.

2. The two-position three-way solenoid valve with integrated one-way valve element according to claim 1, characterized in that, The first valve port, core tube, magnetic core, electromagnetic coil, valve sleeve, and check valve are coaxially arranged.

3. The two-position three-way solenoid valve with integrated one-way valve element according to claim 2, characterized in that, The core tube is snapped into the valve cavity, and a sealing element is provided at the bottom of the core tube to seal the valve cavity.

4. The two-position three-way solenoid valve with integrated one-way valve element according to claim 3, characterized in that, A latch is provided on the inner side of the valve cavity, a retaining spring is attached to the latch, and the retaining spring has a retaining arm. The retaining arm extends from the latch into the valve cavity and fits against the outer side of the core tube.

5. The two-position three-way solenoid valve with integrated one-way valve element according to claim 2, characterized in that, A limiting cavity is provided on the inner side of the core tube, and a groove is provided on the outer side of the magnetic core. A reset spring is sleeved on the groove. When the magnetic core moves to the second position, the reset spring abuts against the top of the limiting cavity.

6. The two-position three-way solenoid valve with integrated one-way valve element according to claim 5, characterized in that, The magnetic core is provided with a first pad, a spring, and a second pad from top to bottom inside. The first pad and the second pad are interference-fitted with the inner side of the magnetic core. The first pad faces the first valve port and is used to seal the first valve port when the magnetic core moves to the first position. The second pad faces the valve sleeve and is used to seal the second valve port when the magnetic core moves to the second position. The spring connects the first pad and the second pad.

7. The two-position three-way solenoid valve with integrated one-way valve element according to claim 2, characterized in that, An exhaust connector is provided on the upper outer side of the valve sleeve, and the valve sleeve is screwed to the exhaust connector. A sealing ring is provided between the top outer side of the valve sleeve and the exhaust connector. A sleeve step is provided in the middle of the valve sleeve, and the lower part of the valve sleeve is sleeved with the core tube. The end of the core tube contacts the sleeve step.

8. The two-position three-way solenoid valve with integrated one-way valve element according to claim 7, characterized in that, The unidirectional flow channel is a multi-stage circular step structure that gradually expands radially, and the multi-stage circular step structure includes a check step.

9. The two-position three-way solenoid valve with integrated one-way valve element according to claim 8, characterized in that, The check valve includes a check block and a check spring. The check block is fixed to one end of the check spring. The check block moves away from or against the check step as the pressure in the one-way flow channel changes. The other end of the check spring abuts against the exhaust connector.

10. The two-position three-way solenoid valve with integrated one-way valve element according to claim 9, characterized in that, The check block is configured with an inverted umbrella-shaped structure.

Images