One-way valve and two-way electromagnetic valve

Abstract

The utility model provides a one-way valve and two -way electromagnetic valve. One-way valve includes valve body structure and sealed ball, valve body structure has pressure valve mouth structure, pressure valve mouth structure has one -way mouth, sealed ball is set up in the cavity of valve body structure and is movable, to open and close one -way mouth, pressure valve mouth structure is configured as convenient under extrusion of external force to produce plastic deformation, to make the end of one -way mouth form concave surface, concave surface with the surface of sealed ball adapts, to realize sealing when both contact. In this one-way valve, sealed ball is set up in the cavity of valve body structure and is movable, to open and close one -way mouth, pressure valve mouth structure is configured as under extrusion of external force to produce plastic deformation, to make the end of one -way mouth form concave surface. When sealed ball closes one -way mouth, the surface of sealed ball and the concave surface of one -way mouth contact fully, thereby improved the sealing effect of one -way valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a one-way valve and a two-way solenoid valve. Background Technology

[0002] Some solenoid valves have a check valve installed inside them to perform specific functions. Due to space limitations, the check valve installed inside the solenoid valve cannot be too complex and usually adopts a relatively simple structure. Such a check valve has poor sealing performance when closed, affecting its performance. Utility Model Content

[0003] This invention provides a one-way valve and a two-way solenoid valve to solve the problem of poor sealing performance of one-way valves.

[0004] To address the aforementioned problems, according to one aspect of this utility model, a one-way valve is provided, comprising a valve body structure and a sealing ball. The valve body structure has a pressure valve port structure with a one-way port. The sealing ball is movably disposed within the cavity of the valve body structure to open and close the one-way port. The pressure valve port structure is configured to facilitate plastic deformation under external force, thereby forming a concave surface at the end of the one-way port. The concave surface is adapted to the surface of the sealing ball to achieve a seal when the two are in contact.

[0005] In some embodiments, the valve body structure includes a valve cylinder and an annular member disposed at one end of the valve cylinder, the annular member forming the pressure valve port structure, the annular member extending axially into the valve cylinder; the inner hole of the annular member forming the one-way port, and the sealing ball being movably disposed within the cavity of the valve cylinder.

[0006] In some embodiments, the valve body structure is a one-piece structure, and the surface of the annular member facing away from the sealing ball is configured as a concave arc surface.

[0007] In some embodiments, the valve body structure includes an annular gasket, a valve cylinder, and an end plate disposed at one end of the valve cylinder. The end plate has a clearance hole, and the annular gasket forms the pressure valve port structure. The hardness of the annular gasket is less than that of the valve cylinder. The annular gasket is disposed within the cavity of the valve cylinder, and the annular gasket, the inner wall of the valve cylinder, and the end plate are all in a limiting fit. The inner hole of the annular gasket forms the one-way port, the clearance hole avoids the one-way port, and the sealing ball is movably disposed within the cavity of the valve cylinder.

[0008] In some embodiments, a frustum groove is formed between the inner wall of the valve cylinder and the end plate, with the opening at the smaller diameter end of the frustum groove facing the sealing ball, and the annular pad is inserted into the frustum groove.

[0009] In some embodiments, the one-way valve further includes a stop structure disposed at one end of the valve body structure away from the one-way port, the stop structure limiting the movement of the sealing ball away from the one-way port.

[0010] In some embodiments, the valve body structure has an opening at one end away from the one-way port, and the stop structure is an annular retaining ring, which is fixed inside the opening of the valve body structure.

[0011] In some embodiments, the valve body structure has a limiting step in the opening, and the end face of the annular retaining ring abuts against the limiting step; the annular retaining ring and the valve body structure are interference-fitted, or the annular retaining ring and the valve body structure are welded.

[0012] According to another aspect of the present invention, a bidirectional solenoid valve is provided, the bidirectional solenoid valve comprising a main valve assembly, a piston assembly, and a pilot valve assembly, the pilot valve assembly being mounted on the main valve assembly, the main valve assembly having a piston chamber and a first valve port and a second valve port disposed opposite to each other; the piston assembly being movably disposed within the piston chamber to block the first valve port and the second valve port, or to open the first valve port and the second valve port; wherein at least one of the main valve assembly and the pilot valve assembly has the aforementioned one-way valve.

[0013] In some embodiments, the first valve port is connected to a first connecting pipe, and the second valve port is connected to a second connecting pipe; when the piston assembly is in a blocked state, it blocks the first valve port and the second valve port; when the piston assembly is in a conductive state, the first valve port and the second valve port are connected.

[0014] The pilot valve assembly includes a pilot valve seat, two capillary tubes, and two one-way valves. The pilot valve seat has a pilot valve channel and a mounting groove. The end of the pilot valve channel has an openable and closable pilot valve port. The one-way valve is installed in the mounting groove, and one end of the capillary tube is installed in the mounting groove. When the one-way port of the one-way valve is open, the one-way port is connected to the channel in the corresponding capillary tube. The two capillary tubes are a first capillary tube and a second capillary tube. The first capillary tube is connected to the first connecting pipe, and the second capillary tube is connected to the second connecting pipe.

[0015] When the pilot valve port is open, the pilot valve channel and the piston chamber are connected, and one of the first capillary tube and the second capillary tube is connected to the pilot valve channel in one direction through the corresponding one-way valve, and the piston assembly is in the conducting state; when the pilot valve port is closed, the pilot valve channel and the piston chamber are not connected, and the piston assembly is in the blocking state.

[0016] In this check valve, a sealing ball is movably disposed within the cavity of the valve body structure to open and close the one-way port. The valve port structure is configured to facilitate plastic deformation under external pressure, forming a concave surface at the end of the one-way port. When the sealing ball closes the one-way port, the surface of the sealing ball and the concave surface of the one-way port are in full contact, thereby improving the sealing effect of the check valve. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a one-way valve provided in an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of a one-way valve provided in an embodiment of the present invention is shown;

[0020] Figure 3 It shows Figure 2 A schematic diagram of a portion of the structure of a check valve in a [the following text is missing from the original];

[0021] Figure 4 A schematic diagram of a bidirectional solenoid valve provided in an embodiment of the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 100. Check valve; 101. Check port; 110. Valve body structure; 111. Limiting step; 115. Valve cylinder; 116. Annular component; 117. Annular gasket; 118. End plate; 119. Frustum groove; 120. Stop structure; 130. Sealing ball;

[0024] 200, Pilot valve assembly; 210, Pilot valve seat; 211, Pilot valve passage; 221, First capillary tube; 222, Second capillary tube;

[0025] 300. Main valve assembly; 301. Piston chamber; 302. First valve port; 303. Second valve port; 311. First connecting pipe; 312. Second connecting pipe; 321. Outer valve chamber;

[0026] 400 Piston assembly; 410 First piston; 420 Second piston; 430 Elastic element. Detailed Implementation

[0027] The technical solutions in at least one embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one embodiment is merely illustrative and is not intended to limit this application or its applications. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0028] like Figures 1 to 3 As shown, some embodiments of this utility model provide a one-way valve, including a valve body structure 110 and a sealing ball 130. The valve body structure 110 has a valve port structure with a one-way port 101. The sealing ball 130 is movably disposed in the cavity of the valve body structure 110 to open and close the one-way port 101. The valve port structure is configured to facilitate plastic deformation under external force to form a concave surface at the end of the one-way port 101. The concave surface is adapted to the surface of the sealing ball 130 to achieve a seal when the two are in contact.

[0029] In this check valve, a sealing ball 130 is movably disposed within the cavity of the valve body structure 110 to open and close the one-way port 101. The valve port structure is configured to facilitate plastic deformation under external pressure, thereby forming a concave surface at the end of the one-way port 101. When the sealing ball 130 closes the one-way port 101, the surface of the sealing ball 130 and the concave surface of the one-way port 101 are in full contact, thereby improving the sealing effect of the check valve.

[0030] like Figure 1 As shown, the valve body structure 110 includes a valve cylinder 115 and an annular member 116 disposed at one end of the valve cylinder 115. The annular member 116 forms a valve port structure. The end of the annular member 116 with a larger diameter is connected to the end of the valve cylinder 115. From the end of the annular member 116 with a larger diameter to the end of the annular member 116 with a smaller diameter, the annular member 116 extends axially into the valve cylinder 115. The inner hole of the annular member 116 forms a one-way port 101, and the sealing ball 130 is movably disposed in the cavity of the valve cylinder 115.

[0031] With the above design, when the end of the annular part 116 is squeezed, the squeezing stress is concentrated at the end of the one-way port 101, and the end of the one-way port 101 is easily deformed and forms a concave surface. In this way, when the sealing ball 130 closes the one-way port 101, the surface of the sealing ball 130 and the concave surface of the one-way port 101 are in full contact, thereby improving the sealing effect of the one-way valve.

[0032] In some embodiments, the valve body structure 110 is a single piece. The surface of the annular member 116 facing away from the sealing ball 130 is configured as a concave arc surface, so that when the end of the annular member 116 is squeezed, the squeezing stress is concentrated at the end of the one-way port 101.

[0033] like Figure 2 and Figure 3 As shown, in some embodiments, the valve body structure 110 includes an annular gasket 117, a valve cylinder 115, and an end plate 118 disposed at one end of the valve cylinder 115. The valve cylinder 115 and the end plate 118 are integral structures. The end plate 118 has a clearance hole. The annular gasket 117 forms a valve port structure. The hardness of the annular gasket 117 is less than that of the valve cylinder 115. The annular gasket 117 is disposed in the cavity of the valve cylinder 115. The annular gasket 117, the inner wall of the valve cylinder 115, and the end plate 118 are all limited and fitted. The inner hole of the annular gasket 117 forms a one-way port 101. The clearance hole avoids the one-way port 101. The sealing ball 130 is movably disposed in the cavity of the valve cylinder 115.

[0034] The inner wall of the valve cylinder 115 and the end plate 118 limit and support the annular gasket 117. Since the hardness of the annular gasket 117 is less than that of the valve cylinder 115, when the end of the annular gasket 117 is compressed, the compressive stress concentrates at the end of the one-way port 101, making the end of the one-way port 101 prone to deformation and forming a concave surface. Thus, when the sealing ball 130 closes the one-way port 101, the surface of the sealing ball 130 and the concave surface of the one-way port 101 are in full contact, thereby improving the sealing effect of the one-way valve.

[0035] In some embodiments, the annular gasket 117 is made of pure copper or a copper alloy, the valve cylinder 115 and the end plate 118 are made of steel, and the sealing ball 130 is made of steel.

[0036] In some embodiments, a frustoconical groove 119 is formed between the inner wall of the valve cylinder 115 and the end plate 118. The opening at the smaller diameter end of the frustoconical groove 119 faces the sealing ball 130, and an annular gasket 117 is press-fitted into the frustoconical groove 119. After the annular gasket 117 is press-fitted into the frustoconical groove 119, the shape of the annular gasket 117 matches the frustoconical groove 119. Since the opening at the smaller diameter end of the frustoconical groove 119 faces the sealing ball 130, the annular gasket 117 is not easily dislodged from the frustoconical groove 119.

[0037] like Figure 1 and Figure 2 As shown, the valve cylinder 115 has multiple flow holes arranged circumferentially, each flow hole connecting the cavity inside the valve cylinder 115 to the outside of the one-way valve. When the sealing ball 130 closes the one-way port 101, the one-way port 101 is not connected to any of the flow holes. When the sealing ball 130 opens the one-way port 101, the one-way port 101 is connected to each flow hole, forming a channel for fluid flow.

[0038] In some embodiments, the one-way valve further includes a stop structure 120 disposed at the end of the valve body structure 110 away from the one-way port 101. The stop structure 120 limits the movement of the sealing ball 130 away from the one-way port 101. The stop structure 120 defines the position of the sealing ball 130 away from the one-way port 101, preventing the sealing ball 130 from dislodging from the valve body structure 110.

[0039] The valve body structure 110 has an opening at the end away from the one-way port 101, and the stop structure 120 is an annular retaining ring, which is fixed inside the opening of the valve body structure 110. Installing the annular retaining ring at the end of the valve body structure 110 away from the one-way port 101 does not cause deformation of the valve body structure 110 and does not affect the performance of the valve body structure 110.

[0040] The valve body structure 110 has a limiting step 111 inside its opening, and the end face of the annular retaining ring abuts against the limiting step 111. The limiting step 111 limits the depth to which the annular retaining ring is inserted into the opening of the valve body structure 110. In some embodiments, the annular retaining ring and the valve body structure 110 are interference-fitted. Alternatively, in some embodiments, the annular retaining ring and the valve body structure 110 are welded.

[0041] like Figure 4 As shown, this utility model also provides a bidirectional solenoid valve, which includes a main valve assembly 300, a piston assembly 400, and a pilot valve assembly 200. The pilot valve assembly 200 is mounted on the main valve assembly 300. The main valve assembly 300 has a piston chamber 301 and a first valve port 302 and a second valve port 303 disposed opposite to each other. The piston assembly 400 is movably disposed in the piston chamber 301 to block the first valve port 302 and the second valve port 303, or to open the first valve port 302 and the second valve port 303. At least one of the main valve assembly 300 and the pilot valve assembly 200 has the aforementioned one-way valve 100. When the first valve port 302 and the second valve port 303 are open, the first valve port 302 and the second valve port 303 are connected.

[0042] In some embodiments, the first valve port 302 is connected to the first connecting pipe 311, and the second valve port 303 is connected to the second connecting pipe 312; when the piston assembly 400 is in a blocked state, it blocks the first valve port 302 and the second valve port 303; when the piston assembly 400 is in a conducting state, the first valve port 302 and the second valve port 303 are connected; the pilot valve assembly 200 includes a pilot valve seat 210, two capillary tubes, and two one-way valves 100. The pilot valve seat 210 has a pilot valve channel 211 and a mounting groove. The end of the pilot valve channel 211 has an openable and closable pilot valve port. The one-way valve 100 is installed in the mounting groove, and one end of the capillary tube is installed in the mounting groove; wherein, at the one-way port 1 of the one-way valve 100... When 01 is open, the one-way port 101 is connected to the channel in the corresponding capillary tube; the two capillary tubes are the first capillary tube 221 and the second capillary tube 222, the first capillary tube 221 is connected to the first connecting pipe 311, and the second capillary tube 222 is connected to the second connecting pipe 312; wherein, when the pilot valve port is open, the pilot valve channel 211 is connected to the piston chamber 301, and one of the first capillary tube 221 and the second capillary tube 222 is unidirectionally connected to the pilot valve channel 211 through the corresponding one-way valve 100, and the piston assembly 400 is in a conducting state; when the pilot valve port is closed, the pilot valve channel 211 and the piston chamber 301 are not connected, and the piston assembly 400 is in a blocked state. The piston assembly 400 includes a first piston 410, a second piston 420, and an elastic element 430.

[0043] In some embodiments, during the process of the bidirectional solenoid valve switching from the closed state to the open state, the switching action of the piston assembly 400 is as follows:

[0044] When fluid flows from the first connector 311 to the second connector 312, the pressure in the first connector 311 is greater than the pressure in the second connector 312. The pilot valve assembly 200 switches to the open state, the one-way valve 100 in the first capillary tube 221 closes, and the first capillary tube 221 is not connected to the pilot valve passage 211. The one-way valve 100 in the second capillary tube 222 opens, and the pilot valve passage 211 connects to the second capillary tube 222. The piston chamber 301 connects to the second capillary tube 222 through the pilot valve passage 211, and the pressure in the piston chamber 301 decreases. At this time, the pressure in the first connector 311 is greater than the pressure in the piston chamber 301, and the first piston 410 experiences a greater pressure in the first connector 311 than in the piston chamber 301. The pressure of the elastic element 430; the first piston 410 moves away from the first valve port 302, and the first valve port 302 opens; fluid enters the outer valve chamber 321 of the main valve assembly 300 and enters the gap between the second piston 420 and the inner wall of the outer valve chamber 321, providing pressure to the second piston 420 in the direction away from the second valve port 303; the pressure of the fluid at the end of the second piston 420 is greater than the fluid pressure in the piston chamber 301 and the pressure of the elastic element 430, and the second piston 420 moves away from the second valve port 303 under the drive of the pressure difference, and the second valve port 303 opens; the piston assembly 400 switches to the conducting state, and the fluid flows from the first connecting pipe 311 to the second connecting pipe 312.

[0045] When fluid flows from the second connector 312 to the first connector 311, the pressure in the second connector 312 is greater than the pressure in the first connector 311; the pilot valve assembly 200 switches to the open state, the one-way valve 100 in the second capillary tube 222 closes, and the second capillary tube 222 is not connected to the pilot valve passage 211; the one-way valve 100 in the first capillary tube 221 opens, and the pilot valve passage 211 connects to the first capillary tube 221; the piston chamber 301 connects to the first capillary tube 221, and the pressure in the piston chamber 301 decreases; at this time, the pressure in the second connector 312 is greater than the pressure of the fluid in the piston chamber 301, and the second piston 420 experiences a greater pressure from the second connector 312 than from the fluid in the piston chamber 301 and a greater elastic force. The pressure of the elastic element 430 is greater than the sum of the pressure in the piston chamber 301 and the pressure of the elastic element 430. Driven by the pressure difference, the first piston 410 moves away from the first valve port 302, and the first valve port 302 opens. The piston assembly 400 switches to the conducting state, and the fluid flows from the second connecting pipe 312 to the first connecting pipe 311.

[0046] Specifically, a balance channel is provided between the piston chamber 301 and the outer valve chamber 321 to connect them. With this arrangement, when the valve is closed, the fluid in the outer valve chamber 321 can enter the piston chamber 301 through the balance channel, preventing the piston chamber 301 from becoming congested and affecting valve closure. During this process, when fluid flows from the first connector 311 to the second connector 312, the pressure in the first connector 311 is greater than the pressure in the second connector 312. The first piston 410 experiences greater pressure and moves before the second piston 420, opening the first valve port 302. Similarly, when fluid flows from the second connector 312 to the first connector 311, the pressure in the second connector 312 is greater than the pressure in the first connector 311. The second piston 420 experiences greater pressure and moves before the first piston 410, opening the second valve port 303. This allows the fluid to flow into the main valve assembly 300 more quickly.

[0047] Furthermore, since the first piston 410 and the second piston 420 share the elastic element 430, the arrangement space for the elastic element 430 is larger. This allows the use of an elastic element with lower stiffness, reducing the force difference of the elastic element 430 and making the operation of the elastic element 430 more reliable. When the piston assembly 400 is in a blocked state, the elastic force of the elastic element 430 is smaller, which can also reduce the pressure difference that the first piston 410 or the second piston 420 needs to overcome to generate movement, improve the response speed of the piston assembly 400, and thus improve the opening response speed of the solenoid valve and enhance the performance of the solenoid valve.

[0048] In some embodiments, during the process of the bidirectional solenoid valve switching from the open state to the closed state, the switching action of the piston assembly 400 is as follows:

[0049] When the pilot valve assembly 200 switches to the closed state, neither the first capillary tube 221 nor the second capillary tube 222 is connected to the pilot valve channel 211. The fluid in the outer valve chamber 321 flows into the piston chamber 301 through the balance channel, increasing the pressure in the piston chamber 301. The pressure of the fluid in the piston chamber 301 on the first piston 410 and the second piston 420, combined with the pressure of the elastic element 430 on the first piston 410 and the second piston 420, causes the first piston 410 to move toward the first valve port 302 and the second piston 420 to move toward the second valve port 303. When the piston assembly 400 switches to the blocking state, the first piston 410 blocks the first valve port 302 and the second piston 420 blocks the second valve port 303. Neither the first connecting pipe 311 nor the second connecting pipe 312 is connected to the outer valve chamber 321.

[0050] In the above process, when the fluid flows from the first connector 311 to the second connector 312, the pressure of the fluid in the second connector 312 on the second piston 420 is relatively small, and the second piston 420 will first block the second valve port 303; when the fluid flows from the second connector 312 to the first connector 311, the pressure of the fluid in the first connector 311 on the first piston 410 is relatively small, and the first piston 410 will first block the first valve port 302. Thus, during the valve closing process, the first piston 410 or the second piston 420, moving along the fluid flow direction, can quickly block the main valve assembly 300, improving the sealing effect of the piston assembly 400. Furthermore, the elastic force of the elastic element 430 is relatively large at this time, improving the reliability of valve closing.

[0051] Specifically, the minimum flow area of ​​a balance channel is smaller than the minimum flow area of ​​a one-way valve 100. With the above settings, when the piston assembly 400 is in the conducting state, since the flow capacity of the balance channel is less than the flow capacity of the one-way valve 100 when it is open, the pressure in the piston chamber 301 can be guaranteed to be less than the pressure in the outer valve chamber 321, so as to ensure the reliability of valve opening.

[0052] In some embodiments, the pilot valve assembly 200 further includes a housing and a valve core assembly. The pilot valve seat 210 and the housing cooperate to form an upper valve chamber, which communicates with the piston chamber 301. The first capillary tube 221 and the second capillary tube 222 communicate with the upper valve chamber through an openable / closable pilot valve passage 211. The valve core assembly is movably disposed within the upper valve chamber and can block or open the pilot valve passage 211, allowing the pilot valve assembly 200 to switch between an open and closed state. Thus, the valve core assembly can control whether the first capillary tube 221 and the second capillary tube 222 are connected to the piston chamber 301 by controlling the pilot valve passage 211, improving the control effect of the pilot valve assembly 200 and thereby increasing the response speed of the solenoid valve.

[0053] In some embodiments, the end of the first piston 410 has a first channel communicating with the first connecting pipe 311, and the end of the second piston 420 has a second channel communicating with the second connecting pipe 312; the piston assembly 400 further includes a third check valve and a fourth check valve, the third check valve being installed inside the first piston 410 and the fourth check valve being installed inside the second piston 420, the third check valve being used to unidirectionally connect the first channel and the piston chamber 301, and the fourth check valve being used to unidirectionally connect the second channel and the piston chamber 301. The structures of the third and fourth check valves are the same as those of the check valve 100, or the structures of the third and fourth check valves are different from those of the check valve 100.

[0054] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0055] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0058] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

Claims

1. A one-way valve characterized by, The device includes a valve body structure (110) and a sealing ball (130). The valve body structure (110) has a pressure valve port structure with a one-way port (101). The sealing ball (130) is movably disposed in the cavity of the valve body structure (110) to open and close the one-way port (101). The pressure valve port structure is configured to allow for plastic deformation under external force to form a concave surface at the end of the one-way port (101). The concave surface is adapted to the surface of the sealing ball (130) to achieve a seal when the two are in contact.

2. The one-way valve of claim 1, wherein The valve body structure (110) includes a valve cylinder (115) and an annular member (116) disposed at one end of the valve cylinder (115). The annular member (116) forms the pressure valve port structure and extends into the valve cylinder (115) along the axial direction. The inner hole of the annular member (116) forms the one-way port (101), and the sealing ball (130) is movably disposed in the cavity of the valve cylinder (115).

3. The one-way valve of claim 2, wherein, The valve body structure (110) is an integral structure, and the surface of the annular part (116) facing away from the sealing ball (130) is set as an inwardly concave arc surface.

4. The one-way valve of claim 1, wherein, The valve body structure (110) includes an annular gasket (117), a valve cylinder (115), and an end plate (118) disposed at one end of the valve cylinder (115). The end plate (118) has a clearance hole. The annular gasket (117) forms the pressure valve port structure. The hardness of the annular gasket (117) is less than that of the valve cylinder (115). The annular gasket (117) is disposed in the cavity of the valve cylinder (115). The annular gasket (117), the inner wall of the valve cylinder (115), and the end plate (118) are all in a limiting fit. The inner hole of the annular gasket (117) forms the one-way port (101). The clearance hole avoids the one-way port (101). The sealing ball (130) is movably disposed in the cavity of the valve cylinder (115).

5. The one-way valve of claim 4, wherein, A frustum groove (119) is formed between the inner wall of the valve cylinder (115) and the end plate (118). The opening of the smaller diameter end of the frustum groove (119) faces the sealing ball (130), and the annular gasket (117) is press-fitted into the frustum groove (119).

6. The one-way valve of claim 1, wherein, The one-way valve also includes a stop structure (120), which is disposed at the end of the valve body structure (110) away from the one-way port (101). The stop structure (120) limits the movement of the sealing ball (130) away from the one-way port (101).

7. The one-way valve of claim 6, wherein, The valve body structure (110) has an opening at one end away from the one-way port (101), and the stop structure (120) is an annular retaining ring, which is fixed inside the opening of the valve body structure (110).

8. The one-way valve of claim 7, wherein, The valve body structure (110) has a limiting step (111) in the opening, and the end face of the annular retaining ring abuts against the limiting step (111); the annular retaining ring and the valve body structure (110) are interference fit, or the annular retaining ring and the valve body structure (110) are welded.

9. A bidirectional solenoid valve characterized by comprising: The bidirectional solenoid valve includes a main valve assembly (300), a piston assembly (400), and a pilot valve assembly (200). The pilot valve assembly (200) is mounted on the main valve assembly (300). The main valve assembly (300) has a piston chamber (301) and a first valve port (302) and a second valve port (303) disposed opposite to each other. The piston assembly (400) is movably disposed in the piston chamber (301) to block the first valve port (302) and the second valve port (303), or to open the first valve port (302) and the second valve port (303). At least one of the main valve assembly (300) and the pilot valve assembly (200) has a one-way valve (100) according to any one of claims 1 to 8.

10. The bidirectional solenoid valve according to claim 9, characterized in that, The first valve port (302) is connected to a first connecting pipe (311), and the second valve port (303) is connected to a second connecting pipe (312); when the piston assembly (400) is in the blocking state, it blocks the first valve port (302) and the second valve port (303); when the piston assembly (400) is in the conducting state, the first valve port (302) and the second valve port (303) are connected. The pilot valve assembly (200) includes a pilot valve seat (210), two capillaries, and two one-way valves (100). The pilot valve seat (210) has a pilot valve channel (211) and a mounting groove. The end of the pilot valve channel (211) has an openable and closable pilot valve port. The one-way valve (100) is installed in the mounting groove, and one end of the capillary is installed in the mounting groove. When the one-way port (101) of the one-way valve (100) is open, the one-way port (101) is connected to the channel in the corresponding capillary. The two capillaries are a first capillary (221) and a second capillary (222). The first capillary (221) is connected to the first connecting pipe (311), and the second capillary (222) is connected to the second connecting pipe (312). When the pilot valve port is open, the pilot valve channel (211) and the piston chamber (301) are connected, and one of the first capillary tube (221) and the second capillary tube (222) is connected to the pilot valve channel (211) in one direction through the corresponding one-way valve (100), and the piston assembly (400) is in the conducting state; when the pilot valve port is closed, the pilot valve channel (211) and the piston chamber (301) are not connected, and the piston assembly (400) is in the blocking state.

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