Valve assemblies and solenoid valves

Abstract

A valve assembly and a solenoid valve, wherein the valve assembly includes a valve cover (200a), a valve core (300a), and a drive unit (400a), the valve cover (200a) having a first housing chamber (201a), the valve core (300a) being located within the first housing chamber (201a), the drive unit (400a) being able to drive the valve core (300a) to move along the inner wall of the first housing chamber (201a), the valve core (300a) having a second housing chamber (301a), and the valve core (300a) and valve cover (200a) A chamber (308a) is formed between them, the second containment chamber (301a) is in communication with the first containment chamber (201a) outside the chamber (308a), and the fluid flowing into the valve cover (200a) includes at least a first branch passage and a second branch passage, the first branch passage flows out through a first passage where the chamber (308a) is located, and the second branch passage flows out through a second passage located outside the chamber (308a), thereby reducing the number of pipelines and valves in the system.

Description

Technical Field

[0001] This disclosure claims the priority of Chinese patent applications filed on May 23, 2023, with application numbers 202310588355.6 and 202310595106.X, and all the contents of this Chinese patent application are hereby incorporated herein by reference in their entirety.

[0002] The present invention relates to a valve assembly and a solenoid valve.

Background Art

[0003] In the related art, a solenoid valve includes a driving device, a valve seat, and a valve core provided in the inner cavity of the valve seat. The driving device realizes the opening and closing of the single flow path of the solenoid valve by driving the valve core to move. When it is necessary to realize the flow of multiple flow paths, it is necessary to use multiple solenoid valves, resulting in an increase in the number of pipelines and valves in the system.

Summary of the Invention

[0004] An object of the present disclosure is to provide a valve assembly and a solenoid valve that alleviate the technical problem that when it is necessary to realize the flow of multiple flow paths, it is necessary to use multiple solenoid valves, resulting in an increase in the number of pipelines and valves in the system.

[0005] According to a first aspect of the present disclosure, the valve assembly provided by the present disclosure includes a valve cover, a valve core, and a driving device. The valve cover has a first accommodating chamber, the valve core is located in the first accommodating chamber, and the driving device can drive the valve core to move along the inner wall of the first accommodating chamber. The valve core has a second accommodating chamber, and a chamber is formed between the valve core and the valve cover. The second accommodating chamber communicates with the first accommodating chamber outside the chamber. The fluid flowing into the valve cover includes at least a first branch path and a second branch path. The first branch path flows out through a first passage where the chamber is located, and the second branch path flows out through a second passage located outside the chamber.

[0006] In one embodiment of the present disclosure, the drive unit includes an electromagnetic coil, a shaft rod, a fixed core, and a movable core, and the valve assembly further includes a socket, the socket fitted to the outside of the fixed core and the movable core, the electromagnetic coil fitted to the outside of the socket, the fixed core fixedly connected to the socket, the movable core movably mounted within the socket, and the valve core connected to the movable core via the shaft rod. The valve core has a first working position and a second working position. When the movable core and the fixed core are attracted together by magnetic force, the valve core is in the second working position; when the movable core and the fixed core are separated to their furthest distance apart, the valve core is in the first working position; or when the movable core and the fixed core are attracted together by magnetic force, the valve core is in the first working position; when the movable core and the fixed core are separated to their furthest distance apart, the valve core is in the second working position.

[0007] In one embodiment of the present disclosure, the valve assembly further includes a return member, which is provided between a fixed core and a movable core.

[0008] In one embodiment of the present disclosure, the valve core includes a tubular body and a top plate, the top plate being fixedly connected to one end of the tubular body and having a through hole, the other end of the tubular body being open and having an annular projection, the edge of the top plate and the edge of the annular projection being sealed and connected to the inner wall of the valve cover, thereby forming a chamber between the outer wall of the tubular body, the inner wall of the valve cover, the top plate and the annular projection.

[0009] In one embodiment of the present disclosure, the valve cover has at least one first communication hole and at least one second communication hole, the drive device includes a first magnetic attraction structure and a second magnetic attraction structure, and the valve core is connected to the second magnetic attraction structure. The second magnetic attraction structure is attracted to or separated from the first magnetic attraction structure by magnetic force, and the second magnetic attraction structure has a separation position, a transition position, and an attraction position that are sequentially provided in a direction approaching the first magnetic attraction structure. When the second magnetic attraction structure is in the separation position, and during the process of moving from the separation position to the transition position, the valve core is in a stationary state, and the second housing chamber is in communication with the first communication hole. When the second magnetic attraction structure moves from the transition position to the attraction position, the second containment chamber communicates with the second communication hole.

[0010] In one embodiment of the present disclosure, the lumen of the tubular body is a second housing chamber, and the second housing chamber communicates with the first housing chambers at both ends of the valve core.

[0011] In one embodiment of the present disclosure, the second magnetic attraction structure includes a magnetic attraction part, a shaft rod, and a buffer member, one end of the magnetic attraction part is attracted to or separated from the first magnetic attraction structure by magnetic force, the other end is connected to the shaft rod, a position-restricting boss is provided on the part of the shaft rod located in the second housing chamber, the buffer member is fitted to the shaft rod and is located between the position-restricting boss and the top plate, as the second magnetic attraction structure moves from the separation position to the transition position, the buffer member is compressed and the valve core is in a stationary state, as the second magnetic attraction structure moves from the transition position to the attraction position, the buffer member is compressed and the shaft rod moves the valve core in a direction approaching the first magnetic attraction structure.

[0012] In one embodiment of the present disclosure, the circumferential outer surface of the valve cover is provided with a plurality of grooves along its axial direction, and a communication hole is provided at the bottom of the grooves, with two adjacent grooves facing the valve core communicating via a chamber.

[0013] In one embodiment of the present disclosure, the communication hole includes a plurality of sub-communication holes, which are spaced apart along the circumferential direction of the groove.

[0014] In one embodiment of the present disclosure, the sub-communication hole is an elongated hole, and the length of the elongated hole along the circumferential direction of the valve cover is greater than the length of the elongated hole along the axial direction of the valve cover.

[0015] According to a second aspect of this disclosure, the solenoid valve further provided in this disclosure includes a valve seat and the valve assembly, wherein the valve seat has a valve chamber and a valve cover is fixedly mounted within the valve chamber. The valve seat is provided with a first sub-flow port, a second sub-flow port, a second flow port, and a third flow port that communicate with the valve chamber, and the valve cover is provided with communication holes at positions corresponding to at least the second sub-flow port, the second flow port, and the third flow port, and the communication holes communicate with the chamber or with a first containment chamber outside the chamber. The valve core has a first working position and a second working position. When the valve core is in the first working position, the first passage includes a second sub-flow port that communicates in sequence, a communication hole corresponding to the second sub-flow port, a chamber, a communication hole corresponding to the second flow port, and the second flow port; the second passage is configured to include a first sub-flow port that communicates in sequence, a first housing chamber located outside the chamber, a communication hole corresponding to the third flow port, and the third flow port. Furthermore, when the valve core is in the second working position, the first passage is configured to include a second sub-flow port that communicates in sequence, a communication hole corresponding to the second sub-flow port, a chamber, a communication hole corresponding to the third flow port, and a third flow port, and the second passage is configured to include a first sub-flow port that communicates in sequence, a first housing chamber located outside the chamber, a communication hole corresponding to the second flow port, and a second flow port.

[0016] In one embodiment of the present disclosure, the outer surface of the valve cover in the circumferential direction is provided with a plurality of grooves along its axial direction, and sealing members are provided between both sides of the grooves and the inner wall of the valve seat.

[0017] In one embodiment of the present disclosure, a retaining member is provided on the inner wall of the valve chamber, and when the valve core is in a second working position, the valve core and the retaining member are in contact with each other.

[0018] According to a third aspect of the present disclosure, the solenoid valve further provided in the present disclosure includes a valve seat and the valve assembly, the valve seat having a valve chamber and at least one first flow port, at least one second flow port, and at least one third flow port communicating with the valve chamber, at least a portion of the valve cover located within the valve chamber, the first communication hole located at a position corresponding to the second flow port of the valve cover, and the second communication hole located at a position corresponding to the third flow port of the valve cover. When the second magnetic attraction structure is located in the separation position, and during the process of moving from the separation position to the transition position, at least one first flow port is in communication with the second flow port. When the second magnetic attraction structure moves from the transition position to the attraction position, at least one of the first flow ports communicates with the third flow port.

[0019] In one embodiment of the present disclosure, there is one first flow port, and when the second magnetic attraction structure is in the separation position, and in the process of moving from the separation position to the transition position, the first sub-flow port and the second flow port are in communication through the second housing chamber, the through hole, the portions located at both ends of the valve core of the first housing chamber, and the first communication hole, and when the second magnetic attraction structure is in the attraction position, the first sub-flow port and the third flow port are in communication through the first housing chamber facing the second communication hole and the second communication hole, Alternatively, the number of first flow ports is one, a chamber is formed between the outer wall of the valve core and the inner wall of the valve cover, the chamber is separated from the second housing chamber, the valve cover further includes a third communication hole, the third communication hole corresponds to the position of the second sub-flow port, when the second magnetic attraction structure is in the separation position and in the process of moving from the separation position to the transition position, the second sub-flow port and the third flow port communicate through the third communication hole, the chamber and the second communication hole, and when the second magnetic attraction structure is in the attraction position, the second sub-flow port and the second flow port communicate through the third communication hole, the chamber and the first communication hole.

[0020] In one embodiment of the present disclosure, the number of the first flow ports is two, and the two first flow ports are respectively a first sub-flow port and a second sub-flow port. The first sub-flow port communicates with the second accommodation chamber. A chamber is formed between the outer wall of the valve core and the inner wall of the valve cover, and the chamber and the second accommodation chamber are blocked. The valve cover further includes a third communication hole, and the third communication hole corresponds to the position of the second sub-flow port. When the second magnetic attraction structure is located at the separation position and during the process of moving from the separation position to the transition position, between the first sub-flow port and the second flow port, they communicate through the second accommodation chamber, the through hole, the first accommodation chambers located at both ends of the valve core, and the first communication hole. Between the second sub-flow port and the third flow port, they communicate through the third communication hole, the chamber, and the second communication hole. When the second magnetic attraction structure is located at the engagement position, between the first sub-flow port and the third flow port, they communicate through the portion located outside the chamber of the first accommodation chamber and the second communication hole. Between the second sub-flow port and the second flow port, they communicate through the third communication hole, the chamber, and the first communication hole.

[0021] In one embodiment of the present disclosure, the directions of the first sub-flow port, the second sub-flow port, the second flow port, and the third flow port are all perpendicular to the axis of the valve cover.

[0022] The beneficial effects of the present disclosure are mainly as follows. In the valve assembly according to the present disclosure, the valve core is located in the first accommodation chamber of the valve cover, and a chamber is formed between the outer wall of the valve core and the inner wall of the valve cover. That is, the chamber and the portion other than the chamber of the first accommodation chamber are separated by the valve core. The second accommodation chamber communicates with the portion other than the chamber of the first accommodation chamber. During use, the driving device drives the valve core to move along the inner wall of the first accommodation chamber, so that the fluid flowing into the valve cover includes at least a first branch path and a second branch path. The first branch path flows out through the first passage where the chamber is located, and the second branch path can flow out through the second passage where the portion other than the chamber of the first accommodation chamber is located, which can reduce the number of pipelines and valves in the system.

Brief Description of the Drawings

[0023] The above and other features and advantages of the present invention will become more apparent by describing its exemplary embodiments in detail with reference to the drawings.

[0024] [Figure 1] In the solenoid valve according to Embodiment 1 of the present disclosure, it is a schematic structural diagram when the valve core is in the first working position. [Figure 2] In the solenoid valve according to Embodiment 1 of the present disclosure, it is a schematic structural diagram when the valve core is in the second working position. [Figure 3] It is a schematic structural diagram of the valve cover according to Embodiment 1 of the present disclosure. [Figure 4] It is a schematic structural diagram of the engagement between the valve core and the shaft rod according to Embodiment 1 of the present disclosure. [Figure 5] It is a schematic structural diagram of the stopper member according to Embodiment 1 of the present disclosure. [Figure 6] It is another schematic diagram of the drive device according to Embodiment 1 of the present disclosure. [Figure 7] In the valve assembly according to Embodiment 1 of the present disclosure, it is a schematic structural diagram when the valve core is in the first working position. [Figure 8] In the valve assembly according to Embodiment 1 of the present disclosure, it is a schematic structural diagram when the valve core is in the second working position. [Figure 9] It is a schematic structural diagram of the flow path switching valve according to Embodiment 2 of the present disclosure in the non - energized state. [Figure 10] It is a schematic structural diagram of the flow path switching valve according to Embodiment 2 of the present disclosure at the moment of energization switching. [Figure 11] It is a partially enlarged view of part A related to FIG. 10. [Figure 12] It is a schematic structural diagram of the flow path switching valve according to Embodiment 2 of the present disclosure in the energized state. [Figure 13] It is a schematic structural diagram of a variant of the flow path switching valve according to Embodiment 2 of the present disclosure in the non - energized state. [Figure 14] It is a schematic structural diagram of a variant of the flow path switching valve according to Embodiment 2 of the present disclosure in the energized state. [Figure 15]This is a schematic diagram of the core shaft structure according to Embodiment 2 of the present disclosure. [Figure 16] This is a schematic diagram of the structure of the shaft rod according to Embodiment 2 of the present disclosure. [Figure 17] This is a schematic diagram of the structure of the valve cover according to Embodiment 2 of the present disclosure. [Figure 18] This is a schematic diagram of the structure of the fastening member according to Embodiment 2 of the present disclosure. [Figure 19] This is a schematic diagram of the structure of the valve assembly according to Embodiment 2 of the present disclosure in a non-energized state. [Figure 20] This is a schematic diagram of the structure of a valve assembly according to Embodiment 2 of this disclosure in the instantaneous state of energization switching. [Figure 21] This is a schematic diagram of the structure of the valve assembly according to Embodiment 2 of the present disclosure in an energized state.

[0025] 100a Valve seat, 102a Second flow port, 103a Third flow port, 104a First sub-flow port, 105a Second sub-flow port, 200a Valve cover, 201a First housing chamber, 202a Communication hole, 2021a Sub-communication hole, 203a Groove, 204a First sealing member, 205a Annular position limiting boss, 300a Valve core, 301a Second housing chamber, 302a Through hole, 303a Tube body, 304a Top plate, 305a Annular projection, 306a Second sealing member, 307a Third sealing member, 308a Chamber, 400a Drive unit, 401a Fixed core, 402a Movable core, 403a Electromagnetic coil, 404a Socket, 500a Shaft rod, 501a Equalizing hole, 502a Equalizing passage, 600a Return member, 700a Stopping member, 701a Annular stopper edge, 702a Annular limiting groove, 100b Valve seat, 101b First flow port, 102b Second flow port, 103b Third flow port, 104b First sub-flow port, 105b Second sub-flow port, 106b Sleeve, 200b Valve core, 201b Second housing chamber, 202b Through hole, 203b Tube body, 204b Top plate, 205b Annular projection, 206b Second sealing member, 207b Third sealing member, 208b Chamber, 300b Drive unit, 310b First magnetic attraction structure, 320b Second magnetic attraction structure, 321b Magnetic attraction part, 322b Shaft rod, 3221b Position limiting boss, 32211b Contact surface, 3222b Position limiting boss part, 303b Cushioning member, 304b Return member, 305b Electromagnetic coil, 400b valve cover, 401b first housing chamber, 4021b first communication hole, 4022b second communication hole, 4023b third communication hole, 403b groove, 404b first sealing member, 405b annular position limiting boss, 406b annular recess, 500b stopper member, 501b annular stopper edge, 502b annular limiting groove, 600b buffer gap. [Modes for carrying out the invention]

[0026] The exemplary embodiments will now be described more comprehensively with reference to the drawings. However, the exemplary embodiments can be carried out in various forms and should not be understood as being limited to the embodiments described herein. In this specification, relative terms such as “top” and “bottom” are used to describe the relative relationship of one illustrated assembly to another, but these terms are used herein for convenience only, as are the exemplary orientations shown in the drawings. If the illustrated device is inverted and its top and bottom are reversed, it can be seen that the assembly described as “top” becomes the assembly “bottom”. Other relative terms such as “top” and “bottom” are said to have similar meanings. When one structure is “top” another structure, it may mean that one structure is formed integrally on top of the other structure, that one structure is “directly” mounted on top of the other structure, or that one structure is “indirectly” mounted on top of the other structure via the other structure.

[0027] The terms "one," "one," "this," and "the aforementioned" are used to indicate the existence of one or more elements / components / etc. The terms "includes" and "possess" are used to express an open sense of inclusion, meaning that there may be other elements / components / etc. besides those listed. Terms such as "first," "second," etc., are used for notation only and do not limit the number of objects they refer to.

[0028] Example 1 Referring to Figures 1 to 6, the solenoid valve provided in this embodiment includes a valve seat 100a and a valve assembly, the valve assembly including a valve cover 200a, a valve core 300a, and a drive unit 400a, the valve seat 100a having a valve chamber, the valve cover 200a being fixedly mounted inside the valve chamber, the valve seat 100a being provided with a first sub-flow port 104a, a second sub-flow port 105a, a second flow port 102a, and a third flow port 103a communicating with the valve chamber, and the valve cover 200a being at least the second sub-flow port Communication holes 202a are provided at positions corresponding to the first communication hole, the second communication hole, and the third communication hole 103a, respectively. A chamber 308a is formed between the outer wall of the valve core 300a and the inner wall of the valve cover 200a. The communication holes 202a communicate with the chamber 308a, or with the first housing chamber 201a outside the chamber 308a. The valve core 300a has a first working position and a second working position. When the valve core 300a is in the first working position, the first passage includes, in order, a second sub-flow port 105a, a communication hole 202a corresponding to the second sub-flow port 105a, a chamber 308a, a communication hole 202a corresponding to the second flow port 102a, and the second flow port 102a, and the second passage is configured to include, in order, a first sub-flow port 104a, a first containment chamber 201a located outside the chamber 308a, a communication hole 202a corresponding to the third flow port 103a, and the third flow port 103a, and further When the valve core 300a is in the second working position, the first passage is configured to include, in order, a second sub-flow port 105a communicating with the second sub-flow port 105a, a communication hole 202a corresponding to the second sub-flow port 105a, a chamber 308a, a communication hole 202a corresponding to the third flow port 103a, and the third flow port 103a, and the second passage is configured to include, in order, a first sub-flow port 104a communicating with the first sub-flow port 104a, a first containment chamber 201a located outside the chamber 308a, a communication hole 202a corresponding to the second flow port 102a, and the second flow port 102a.

[0029] In this embodiment, the solenoid valve has a valve core 300a located within the first housing chamber 201a of the valve cover 200a, and a chamber 308a is formed between the outer wall of the valve core 300a and the inner wall of the valve cover 200a. That is, the chamber 308a and the portion of the first housing chamber 201a excluding the chamber 308a are separated by the valve core 300a, and the second housing chamber 301a communicates with the portion of the first housing chamber 201a excluding the chamber 308a. During use, the drive unit 400a drives the valve core 3 By driving 00a to move along the inner wall of the first containment chamber 201a, the fluid flowing into the valve seat 100a and valve cover 200a can be made to include at least a first branch passage and a second branch passage, the first branch passage flowing out through a first passage where the chamber 308a is located, and the second branch passage flowing out through a second passage where the portion of the first containment chamber 201a excluding the chamber 308a is located, thereby reducing the number of pipelines and valves in the system.

[0030] In one embodiment, the valve seat 100a is provided with a first sub-flow port 104a, a second sub-flow port 105a, a second flow port 102a, and a third flow port 103a that communicate with the valve chamber, and the valve cover 200a is provided with a communication hole 202a at a position corresponding to at least the second sub-flow port 105a, the second flow port 102a, and the third flow port 103a, and the communication hole 202a communicates with the chamber 308a or with a first housing chamber 201a outside the chamber 308a, and the valve core 300a has a first working position and a second working position, and when the valve core 300a is in the first working position, the first passage is the second sub-flow port 105a, The chamber 308a is connected by a second flow port 102a and a corresponding communication hole 202a, and the second passage is configured to be connected by a first sub-flow port 104a, a first housing chamber 201a located outside the chamber 308a and a corresponding communication hole 202a. Furthermore, when the valve core 300a is in a second working position, the first passage is connected by a second sub-flow port 105a, a chamber 308a, a third flow port 103a and a corresponding communication hole 202a, and the second passage is configured to be connected by a first sub-flow port 104a, a second housing chamber 301a, a first housing chamber 201a located outside the chamber 308a and a corresponding communication hole 202a.

[0031] Exemplary, when the valve core 300a is in the first working position, the first passage is configured to include, in order, a second sub-flow port 105a, a communication hole corresponding to the second sub-flow port 105a, a chamber 308a, a communication hole corresponding to the second flow port 102a, and the second flow port 102a, and the second passage is configured to include, in order, a first sub-flow port 104a, a first housing chamber 201a located outside the chamber 308a, a communication hole corresponding to the third flow port 103a, and the third flow port 103a. Furthermore, when the valve core 300a is in the second working position, the first passage is configured to include, in order, a second sub-flow port 105a communicating with the second sub-flow port 105a, a communication hole corresponding to the second sub-flow port 105a, a chamber 308a, a communication hole corresponding to the third flow port 103a, and the third flow port 103a, and the second passage is configured to include, in order, a first sub-flow port 104a communicating with the first sub-flow port 104a, a first housing chamber 201a located outside the chamber 308a, a communication hole corresponding to the second flow port 102a, and the second flow port 102a.

[0032] In one embodiment, referring to Figure 4, the valve core 300a includes a pipe body 303a and a top plate 304a. The top plate 304a is fixedly connected to one end of the pipe body 303a, and the top plate 304a has a through hole 302a which communicates with a second housing chamber 301a. The other end of the pipe body 303a is open and has an annular projection 305a. The edge of the top plate 304a and the edge of the annular projection 305a are sealed and connected to the inner wall of the valve cover 200a, thereby forming a chamber 308a between the outer wall of the pipe body 303a, the inner wall of the valve cover 200a, the top plate 304a and the annular projection 305a.

[0033] Referring to Figures 1 and 4, the edge of the top plate 304a protrudes from the outer wall of the pipe body 303a, and the top plate 304a and the pipe body 303a may be integrally molded or welded together. A second sealing member 306a is provided between the circumferential edge of the top plate 304a and the inner wall of the valve cover 200a, and a third sealing member 307a is provided between the circumferential edge of the annular projection 305a and the inner wall of the valve cover 200a. As a result, the space enclosed by the outer wall of the pipe body 303a, the inner wall of the valve cover 200a, the lower surface of the portion of the top plate 304a protruding from the pipe body 303a, and the upper surface of the annular projection 305a forms a chamber 308a. When the valve core 300a switches between a first working position and a second working position, this chamber 308a can communicate with different communication holes 202a, thereby enabling flow path switching.

[0034] The first sub-flow port 104a communicates with the second storage chamber 301a, and there are three communication holes 202a, the three communication holes 202a communicating with the second sub-flow port 105a, the second flow port 102a, and the third flow port 103a, respectively.

[0035] When the valve core 300a is in the first working position, the first sub-flow port 104a is configured to communicate with the third flow port 103a, and the second sub-flow port 105a is configured to communicate with the second flow port 102a. Furthermore, when the valve core 300a is in the second working position, the first sub-flow port 104a is configured to communicate with the second flow port 102a, and the second sub-flow port 105a is configured to communicate with the third flow port 103a. Furthermore, when the valve core 300a is in the second working position, the valve core 300a is located between the second flow port 102a and the first sub-flow port 104a, and the first sub-flow port 104a is configured to communicate with the second flow port 102a via the pipe body 303a that penetrates the central part and the through hole 302a on the top plate.

[0036] For example, if the first sub-flow port 104a communicates with the third flow port 103a, and the second sub-flow port 105a communicates with the second flow port 102a, then either the first sub-flow port 104a or the third flow port 103a is a fluid inlet and the other is a fluid outlet, and either the second sub-flow port 105a or the second flow port 102a is a fluid inlet and the other is a fluid outlet, but this is not limited here.

[0037] Specifically, referring to Figure 1, when the drive device 400a drives the valve core 300a to move it to the first working position within the first housing chamber 201a, the first sub-flow port 104a and the third flow port 103a are connected via the communication hole 202a corresponding to the first housing chamber 201a and the third flow port 103a, thereby forming a second passage. At the same time, the second sub-flow port 105a and the second flow port 102a are connected via the communication hole 202a corresponding to the chamber 308a and the second flow port 102a, thereby forming a first passage.

[0038] Referring to Figure 2, when the valve core 300a moves to the second working position within the first housing chamber 201a by the drive of the drive device 400a, the first sub-flow port 104a and the second flow port 102a are connected via the second housing chamber 301a, the through hole 302a, and the communication hole 202a corresponding to the second flow port 102a, thereby forming a second passage. At the same time, the second sub-flow port 105a and the third flow port 103a are connected via the chamber 308a and the communication hole 202a corresponding to the third flow port 103a, thereby forming a first passage.

[0039] In one embodiment, referring to Figure 3, a plurality of grooves 203a are provided on the circumferential outer surface of the valve cover 200a, sealing members are provided between both sides of the grooves 203a and the inner wall of the valve seat 100a, a communication hole 202a is provided at the bottom of the groove 203a, and two adjacent grooves 203a communicate via a chamber 308a.

[0040] For example, referring to Figure 1, the valve cover 200a is a cylindrical structure positioned inverted inside the valve chamber. The bottom surface of the cylindrical structure is fixed to the valve seat 100a by fastening members such as bolts and nuts. The lumen of the cylindrical structure forms a first housing chamber 201a, and a mounting hole is provided in the bottom surface for the drive unit 400a to pass through. Three grooves 203a are provided on the circumferential outer surface of the valve cover 200a. The sealing members provided between both sides of the grooves 203a and the inner wall of the valve seat 100a are referred to as the first sealing members 204a. There are four first sealing members 204a, meaning that there is one groove 203a between each of two adjacent first sealing members 204a. This configuration ensures that sealing is achieved between the valve cover 200a and the valve seat 100a, and that the first sub-flow port 104a, the second sub-flow port 105a, the second flow port 102a, and the third flow port 103a each communicate only with their respective communication holes 202a. Furthermore, it ensures the accuracy of the flow path switching route.

[0041] For example, the first sealing member 204a may be a sealing ring.

[0042] The number of grooves 203a can be selected according to the number of the first sub-flow ports 104a, the second sub-flow ports 105a, the second flow port 102a, and the third flow port 103a.

[0043] In one embodiment, referring to Figure 3, the main opening 202a includes a plurality of sub-openings 2021a, which are spaced apart along the circumferential direction of the groove 203a. In this configuration, fluid flows out from multiple sub-openings 2021a on the same groove 203a, thereby increasing the fluid flow area, which is particularly suitable for large-diameter valve bodies. Exemplarily, there are at least two sub-openings 2021a.

[0044] If the diameters of the first sub-flow port 104a, the second sub-flow port 105a, the second flow port 102a, and the third flow port 103a are increased, the diameter of the communication hole 202a on the valve cover 200a must also be increased accordingly. However, if the communication hole 202a is a circular hole, increasing the diameter of the circular hole will result in an excessive axial length of the valve cover 200a. As a result, the movement stroke of the valve core 300a within the first containment chamber 201a will be longer, and the resistance to driving the valve core 300a to move the drive device 400a will increase, which may cause the flow path switching to fail.

[0045] In one embodiment, in order to increase the fluid flow area, shorten the travel stroke of the valve core 300a, and improve the efficiency of flow path switching, the sub-communication hole 2021a is an elongated hole, and the length of the elongated hole along the circumferential direction of the valve cover 200a is greater than the length of the elongated hole along the axial direction of the valve cover 200a.

[0046] Since the circumferential length of the elongated hole valve cover 200a is greater than the axial length of the elongated hole valve cover 200a, the axial dimension of the valve cover 200a can be reduced while ensuring a sufficiently large flow area of ​​the elongated hole. Furthermore, the movement stroke of the valve core 300a within the first housing chamber 201a can be shortened, improving the efficiency of flow path switching.

[0047] For example, the elongated hole may be, but is not limited to, an oblong hole, an elongated hole, or an elliptical hole.

[0048] In one embodiment, the drive unit includes an electromagnetic coil 403a, a shaft rod 500a, a fixed core 401a, and a movable core 402a, and the solenoid valve further includes a socket 404a, the socket 404a is inserted into the central chamber of the electromagnetic coil 403a, at least a portion of the fixed core 401a is fixedly connected to the socket 404a, the movable core 402a is movably mounted within the socket 404a, the valve core 300a is attached to the movable core 402a, and the movable core 402a can be attracted to or separated from the fixed core 401a by magnetic force, thereby positioning the valve core 300a in a first working position or a second working position. When the movable core 402a and the fixed core 401a are attracted to each other by magnetic force, the valve core 300a is in a second working position, and when the movable core 402a and the fixed core 401a are separated to their furthest distance apart, the valve core 300a is in a first working position.

[0049] As shown in Figure 1, a portion of the fixed core 401a is fixedly mounted within a mounting hole, and the movable core 402a is located above the fixed core 401a. The socket 404a is inserted into the central chamber of the electromagnetic coil 403a, with the bottom surface of the socket 404a facing upward. The movable core 402a is located within the socket 404a, and the bottom surface of the socket 404a is used to restrict the movable core 402a. Exemplarily, when the movable core 402a contacts the bottom surface, the movable core 402a stops moving, and at this time, the movable core 402a is separated from the fixed core 401a.

[0050] In one embodiment, the valve core 300a is fixedly connected to the movable core 402a via a shaft rod 500a, and the fixed core 401a is provided with a hole through which the shaft rod 500a passes. The movable core 402a and the shaft rod 500a are provided with a balancing passage 502a that communicates with each other, thereby enabling rapid internal balancing within the valve chamber, reducing the resistance experienced during the movement of the valve core 300a, and improving the smoothness of the movement of the valve core 300a. In this embodiment, the direction of extension of the balancing passage 502a is the same as the axial direction of the movable core 402a and the shaft rod 500a.

[0051] In one embodiment, referring to Figure 4, the shaft rod 500a is provided with an equilibrium hole 501a, which penetrates the shaft rod 500a along its radial direction and communicates with an equilibrium passage 502a. By providing the equilibrium hole 501a, it is possible to further equilibrium the air pressure, thereby further improving the effect of air pressure equilibrium in the valve chamber and ensuring the smooth movement of the valve core 300a.

[0052] As shown in Figure 6, the positions of the fixed core 401a and the movable core 402a can be swapped; that is, the fixed core 401a may be positioned above the movable core 402a. In the structure shown in Figure 6, when the movable core 402a and the fixed core 401a are attracted to each other by magnetic force, the valve core 300a is in the first working position, and when the movable core 402a and the fixed core 401a are separated to their furthest distance apart, the valve core 300a is in the second working position.

[0053] In one embodiment, as shown in Figures 1 and 7, the solenoid valve further includes a return member 600a, which is provided between a fixed core 401a and a movable core 402a, and is used to move the movable core 402a away from the fixed core 401a.

[0054] Referring to Figure 1, a housing groove is provided at one end of the fixed core 401a facing the movable core 402a, the return member 600a may be a compression spring, the return member 600a is fitted onto the shaft rod 500a, one end of the return member 600a abuts against the bottom of the housing groove, and the other end of the return member 600a abuts against the movable core 402a.

[0055] For example, referring to Figure 1, in the de-energized state, the valve core 300a is in the first working position, and the first sub-flow port 104a and the third flow port 103a are in communication through the first housing chamber 201a and the communication hole 202a corresponding to the third flow port 103a, and at the same time, the second sub-flow port 105a and the second flow port 102a are in communication through the chamber 308a and the communication hole 202a corresponding to the second flow port 102a.

[0056] Referring to Figure 2, when energized, the movable core 402a moves toward the fixed core 401a and is attracted to the fixed core 401a, and at the same time the return member 600a is compressed, at which point the valve core 300a is in the second working position, and the first sub-flow port 104a and the second flow port 102a are in communication through the second housing chamber 301a, the through hole 302a, and the communication hole 202a corresponding to the second flow port 102a, and at the same time the second sub-flow port 105a and the third flow port 103a are in communication through the chamber 308a and the communication hole 202a corresponding to the third flow port 103a.

[0057] In one embodiment, referring to Figures 1, 2, and 5, the solenoid valve further includes a retaining member 700a, which is installed in the valve chamber and used to support the valve core 300a, and the lumen of the retaining member 700a communicates with a second housing chamber 301a.

[0058] Referring to Figures 1, 2, and 5, the retaining member 700a is fixedly attached to the bottom of the valve cover 200a by fastening members such as bolts, and the circumferential outer surface of the retaining member 700a is closely engaged with the circumferential inner surface of the valve cover 200a. The retaining member 700a is provided with an annular stopper edge 701a, and the upper surface of the annular stopper edge 701a is in contact with the lower end surface of the valve cover 200a. An annular limiting groove 702a is provided on the circumferential outer surface of the retaining member 700a, and an annular position limiting boss 205a is provided on the circumferential inner surface of the valve cover 200a, and the annular position limiting boss 205a is restricted by the annular limiting groove 702a. This configuration not only enables a fixed connection between the retaining member 700a and the valve cover 200a, but also enhances the sealing performance between the retaining member 700a and the valve cover 200a.

[0059] For example, the material of the fastening member 700a is metal.

[0060] The solenoid valve according to this embodiment has a high degree of integration and can switch between multiple flow paths.

[0061] Referring to Figures 7 and 8, this embodiment further provides a valve assembly that can be used independently as an insertion valve.

[0062] In this embodiment, the solenoid valve, excluding the valve seat, forms the valve assembly together.

[0063] The valve assembly according to this embodiment includes a valve cover 200a, a valve core 300a, and a drive device 400a, wherein the valve cover 200a has a first housing chamber 201a, the valve core 300a is located within the first housing chamber 201a, the drive device 400a can drive the valve core 300a to move along the inner wall of the first housing chamber 201a, the valve core 300a has a second housing chamber 301a, a chamber 308a is formed between the valve core 300a and the valve cover 200a, the second housing chamber 301a communicates with the first housing chamber 201a outside the chamber 308a, the fluid flowing into the valve cover 200a includes at least a first branch passage and a second branch passage, the first branch passage flows out through a first passage in which the chamber is located, and the second branch passage flows out through a second passage located outside the chamber.

[0064] In this embodiment, the valve assembly has a valve core 300a located within the first housing chamber 201a of the valve cover 200a, and a chamber 308a is formed between the outer wall of the valve core 300a and the inner wall of the valve cover 200a. That is, the chamber 308a and the portion of the first housing chamber 201a excluding the chamber 308a are separated by the valve core 300a, and the second housing chamber 301a communicates with the portion of the first housing chamber 201a excluding the chamber 308a. During use, the drive unit 400 By driving the valve core 300a to move along the inner wall of the first containment chamber 201a, it is possible to ensure that the fluid flowing into the valve cover 200a includes at least a first branch passage and a second branch passage, the first branch passage flows out through a first passage where the chamber 308a is located, and the second branch passage flows out through a second passage where the portion of the first containment chamber 201a excluding the chamber 308a is located, thereby reducing the number of pipelines and valves in the system.

[0065] In one embodiment, as shown in Figures 7 to 8, the drive unit includes an electromagnetic coil 403a, a shaft rod 500a, a fixed core 401a and a movable core 402a, and the valve assembly further includes a socket 404a, the socket 404a is fitted to the outside of the fixed core 401a and the movable core 402a, the electromagnetic coil 403a is fitted to the outside of the socket 404a, the fixed core 401a is fixedly connected to the socket 404a, and the movable core 402 a is movably mounted within socket 404a, and the valve core 300a is connected to the movable core 402a via shaft rod 500a. The valve core 300a has a first working position and a second working position. When the movable core 402a and the fixed core 401a are attracted by magnetic force, the valve core 300a is in the second working position, and when the movable core 402a and the fixed core 401a are separated to their furthest distance, the valve core 300a is in the first working position.

[0066] Of course, when the movable core 402a and the fixed core 401a are attracted to each other by magnetic force, the valve core 300a is in a first working position, and when the movable core 402a and the fixed core 401a are separated to their furthest distance apart, the valve core 300a may be in a second working position.

[0067] Since the structure of the drive device in this embodiment is the same as the structure of the drive device in the solenoid valve according to this embodiment, a detailed explanation will be omitted here.

[0068] In one embodiment, as shown in Figures 7 to 8, the valve assembly further includes a return member 600a, which is provided between the fixed core 401a and the movable core 402a.

[0069] A housing groove is provided at one end of the fixed core 401a facing the movable core 402a, and the return member 600a may be a compression spring, the return member 600a is fitted onto the shaft rod 500a, one end of the return member 600a abuts against the bottom of the housing groove, and the other end of the return member 600a abuts against the movable core 402a.

[0070] Since the structure and installation method of the return member in this embodiment are the same as those of the return member in the solenoid valve according to this embodiment, a detailed explanation is omitted here.

[0071] In one embodiment, as shown in Figure 4, the valve core 300a includes a pipe body 303a and a top plate 304a, the top plate 304a is fixedly connected to one end of the pipe body 303a, the top plate 304a has a through hole, the other end of the pipe body 303a is open and has an annular projection 305a, the edge of the top plate 304a and the edge of the annular projection 305a are sealed and connected to the inner wall of the valve cover 200a, thereby forming a chamber 308a between the outer wall of the pipe body 303a, the inner wall of the valve cover 200a, the top plate 304a and the annular projection 305a.

[0072] In one embodiment, as shown in Figure 3, the circumferential outer surface of the valve cover 200a is provided with a plurality of grooves 203a along its axial direction, and a communication hole 202a is provided at the bottom of each groove 203a, with two adjacent grooves 203a facing the valve core 300a communicating via a chamber 308a.

[0073] In one embodiment, the communication hole 202a includes a plurality of sub-communication holes 2021a, and the plurality of sub-communication holes 2021a are provided at intervals along the circumferential direction of the groove 203a.

[0074] In one embodiment, the sub-communication hole 2021a is an elongated hole, and the length of the elongated hole along the circumferential direction of the valve cover 200a is greater than the length of the elongated hole along the axial direction of the valve cover 200a.

[0075] Since the structure of the valve core and valve cover in this embodiment is the same as that of the solenoid valve in this embodiment, a detailed explanation is omitted here.

[0076] Example 2 Referring to Figures 9 to 18, the solenoid valve according to this embodiment includes a valve seat 100b and a valve assembly, the valve assembly includes a valve cover 400b, a valve core 200b, and a drive unit 300b, the valve cover 400b has a first housing chamber 401b, at least one first communication hole 4021b and at least one second communication hole 4022b, the valve core 200b is located in the first housing chamber 401b and has a second housing chamber 201b, and the drive unit 300b has a first magnetic attraction structure 310b and a second magnetic attraction The structure includes a valve core 200b connected to a second magnetic attraction structure 320b, the second magnetic attraction structure 320b attracts or separates from the first magnetic attraction structure 310b by magnetic force, the second magnetic attraction structure 320b has a separation position, a transition position and an attraction position, which are sequentially provided along the direction approaching the first magnetic attraction structure 310b, and when the second magnetic attraction structure 320b is in the separation position and in the process of moving from the separation position to the transition position, the valve core 200b is in a stationary state, and the second The containment chamber 201b communicates with the first communication hole 4021b, and when the second magnetic attraction structure 320b moves from the transition position to the attraction position, the second containment chamber 201b communicates with the second communication hole 4022b, the valve seat 100b has a valve chamber, at least one first flow port 101b communicating with the valve chamber, at least one second flow port 102b and at least one third flow port 103b, at least a portion of the valve cover 400b is located inside the valve chamber, and the first communication hole 4021b communicates with the valve cover 400b The second communication hole 4022b is located in a position corresponding to the second flow port 102b of the valve cover 400b, and when the second magnetic attraction structure 320b is in the separation position, and in the process of moving from the separation position to the transition position, at least one first flow port 101b communicates with the second flow port 102b, and when the second magnetic attraction structure 320b moves from the transition position to the attraction position, at least one first flow port 101b communicates with the third flow port 103b.

[0077] In this embodiment, the solenoid valve, when the second magnetic attraction structure 320b is in the separation position and during the process of moving to the transition position, keeps the valve core 200b stationary, and at this time the second magnetic attraction structure 320b does not need to overcome resistance such as differential pressure and frictional force acting on the valve core, and the second housing chamber 201b is connected to the first communication hole 4021b, and at least one first flow port 101b is connected to the second flow port 102b via the second housing chamber 201b and the first communication hole 4021b, and under the action of the drive device 300b, the second magnetic attraction structure 320b moves in a direction approaching the first magnetic attraction structure 310b under the action of electromagnetic force, and the shorter the distance between the second magnetic attraction structure 320b and the first magnetic attraction structure 310b, the stronger the electromagnetic force between them. As the force increases, the electromagnetic force when the second magnetic attraction structure 320b is in the transition position is greater than the electromagnetic force when the second magnetic attraction structure 320b is in the separation position. When the second magnetic attraction structure 320b moves to the transition position, the large electromagnetic force allows the second magnetic attraction structure 320b to overcome the resistance such as differential pressure and frictional force acting on the valve core 200b, and smoothly moves the valve core 200b toward the first magnetic attraction structure 310b until the second magnetic attraction structure 320b moves to the attraction position. At this time, the second housing chamber 201b communicates with the second communication hole 4022b, and at the same time, at least one first flow port 101b communicates with the third flow port 103b via the third communication hole 4023b, achieving smooth switching of different flow paths.

[0078] In one embodiment, referring to Figure 16, the valve core 200b includes a tubular body 203b and a top plate 204b, the lumen of the tubular body 203b is a second housing chamber 201b, the top plate 204b is fixedly connected to one end of the tubular body 203b, the top plate 204b has a through hole 202b, the other end of the tubular body 203b is provided as an open hole with a hole that communicates with the through hole 202b, and exemplary, there are multiple through holes 202b. The second housing chamber 201b communicates with the first housing chambers 401b at both ends of the valve core 200b. Here, the first housing chambers at both ends of the valve core refer to the portions of the first housing chamber located at both ends of the valve core.

[0079] In one embodiment, an annular projection 205b is provided at one end of the pipe body 203b away from the top plate 204b, and the edge of the top plate 204b and the edge of the annular projection 205b are sealed and connected to the inner wall of the valve cover 400b, respectively, and a chamber 208b is formed between the outer wall of the pipe body 203b, the inner wall of the valve cover 400b, the top plate 204b and the annular projection 205b.

[0080] Illustratively, referring to Figures 9 and 16, a second sealing member 206b is provided between the circumferential edge of the top plate 204b and the inner wall of the valve cover 400b, and a third sealing member 207b is provided between the circumferential edge of the annular projection 205b and the inner wall of the valve cover 400b. As a result, the space enclosed by the outer wall of the pipe body 203b, the inner wall of the valve cover 400b, the lower surface of the portion of the top plate 204b protruding from the pipe body 203b, and the upper surface of the annular projection 205b forms a chamber 208b. When the valve core 200b moves to a different position within the first housing chamber 401b, this chamber 208b can communicate with different communication holes, thereby enabling flow path switching.

[0081] For example, referring to Figure 9, when the solenoid valve is de-energized, the second magnetic attraction structure 320b is in the separated position, and at this time, the first sub-flow port 104b and the second flow port 102b are in communication through the second housing chamber 201b, the through hole 202b, and the first communication hole 4021b corresponding to the second flow port 102b, and at the same time, the second sub-flow port 105b and the third flow port 103b are in communication through the chamber 208b and the second communication hole 4022b corresponding to the third flow port 103b, referring to Figure 10. As a result, at the moment the solenoid valve is energized, the second magnetic attraction structure 320b can move from the separation position to the transition position, and in the process of moving, the first sub-flow port 104b and the second flow port 102b are in communication with each other via the second housing chamber 201b, the through hole 202b, and the first communication hole 4021b corresponding to the second flow port 102b, and at the same time, the second sub-flow port 105b and the third flow port 103b are in communication with each other via the chamber 208b and the second communication hole 4022b corresponding to the third flow port 103b.

[0082] Referring to Figure 12, when the solenoid valve is energized, the second magnetic attraction structure 320b is in the attraction position, that is, the second magnetic attraction structure 320b and the first magnetic attraction structure 310b are attracted to each other by electromagnetic force and become one unit. At this time, the first sub-flow port 104b and the third flow port 103b are in communication through the portion of the first housing chamber 401b located outside the chamber 208b and the second communication hole 4022b corresponding to the third flow port 103b, and the second sub-flow port 105b and the second flow port 102b are in communication through the chamber 208b and the first communication hole 4021b corresponding to the second flow port 102b.

[0083] In one embodiment, referring to Figure 9, the second magnetic attraction structure 320b includes a magnetic attraction part 321b and an axial rod 322b, one end of the magnetic attraction part 321b can be attracted to or separated from the first magnetic attraction structure 310b by magnetic force, the other end of the magnetic attraction part 321b is connected to the axial rod 322b, the axial rod 322b is inserted into the second housing chamber 201b, and a limiting boss 3221b is provided on the portion of the axial rod 322b located in the second housing chamber 201b, and the axial rod 322b is connected to the second magnetic attraction structure When the structure 320b is in the separation position, and during the process of moving to the transition position, a gap is provided between the contact surface 32211b of the limiting boss 3221b and the top plate 204b of the valve core 200b, or the shaft rod 322b is configured such that, during the process of the second magnetic attraction structure 320b moving from the transition position to the separation position, at least a portion of the shaft rod 322b contacts the top plate 204b of the valve core 200b, causing the valve core 200b to move in a direction toward the first magnetic attraction structure 310b.

[0084] Specifically, referring to Figures 9 and 16, in the de-energized state, the second magnetic attraction structure 320b is in the separated position, and the magnetic attraction part 321b and the first magnetic attraction structure 310b are separated from each other. At this time, a gap is provided between the contact surface 32211b of the limiting boss 3221b and the top plate 204b of the valve core 200b. At the moment of energization switching, referring to Figure 10, the second magnetic attraction structure 320b can move from the separated position to the transition position. During the movement process, there is still a gap between the contact surface 32211b of the limiting boss 3221b and the top plate 204b of the valve core 200b. The gap gradually narrows, and the valve core 200b is in a stationary state. When the second magnetic attraction structure 320b moves to the transition position, the contact surface 3221b of the limiting boss 3221b 211b is in contact with the surface of the top plate 204b of the valve core 200b that is away from the first magnetic attraction structure 310b. When electrically energized, referring to Figure 12, the second magnetic attraction structure 320b continues to move toward the first magnetic attraction structure 310b, and the electromagnetic force acting on the second magnetic attraction structure 320b is sufficient to overcome the gravity of the second magnetic attraction structure 320b, the gravity of the valve core 200b, and the resistance acting on the valve core 200b. This ensures that the valve core 200b can move smoothly toward the first magnetic attraction structure 310b by the second magnetic attraction structure 320b until the second magnetic attraction structure 320b moves to the attraction position. In other words, the magnetic attraction part 321b and the first magnetic attraction structure 310b are attracted together by electromagnetic force and become one.

[0085] Exemplary, the maximum distance between the contact surface 32211b of the limiting projection 3221b and the surface of the top plate 204b away from the first magnetic attraction structure 310b is equal to the distance between the separation position and the transition position of the second magnetic attraction structure 320b. Such an embodiment reflects the distance between the separation position and the transition position by the maximum distance between the contact surface 32211b of the limiting projection 3221b and the surface of the top plate 204b away from the first magnetic attraction structure 310b. If it is necessary to adjust the distance between the separation position and the transition position, this can be achieved by adjusting the maximum distance between the contact surface 32211b of the limiting projection 3221b and the surface of the top plate 204b away from the first magnetic attraction structure 310b.

[0086] Furthermore, the positions of the first magnetic attraction structure 310b and the second magnetic attraction structure 320b can be swapped; that is, the first magnetic attraction structure 310b may be located below the second magnetic attraction structure 320b.

[0087] In one embodiment, referring to Figures 9 and 16, the second magnetic attraction structure 320b further includes a buffer member 303b, and a position limiting boss portion 3222b is provided at one end of the position limiting boss portion 3221b away from the magnetic attraction portion 321b, the buffer member 303b is attached to the shaft rod 322b, one end of the buffer member 303b is connected to the position limiting boss portion 3222b, and the other end of the buffer member 303b is connected to the top plate 204b.

[0088] Exemplary, the cushioning member 303b may be a compression spring. The cushioning member 303b is fitted to the outside of the shaft rod 322b, one end of the cushioning member 303b is connected to the position limiting boss portion 3222b, and the other end of the cushioning member 303b is connected to the top plate 204b. When the contact surface 32211b of the limiting boss 3221b contacts a surface of the top plate 204b of the valve core 200b that is away from the first magnetic attraction structure 310b, the cushioning member 303b performs a cushioning action, mitigating the impact force exerted by the limiting boss 3221b on the valve core 200b and maintaining stability during the movement process of the valve core 200b.

[0089] Referring to Figures 9 and 10, when the solenoid valve is switched from a non-energized state to an energized state, the buffer member 303b is compressed. After energization, under the elastic action of the buffer member 303b, the valve core 200b moves a predetermined distance in a direction approaching the first magnetic attraction structure 310b until the top plate 204b contacts the annular recess 406b on the inner wall of the valve cover 400b. At this time, the first sub-flow port 104b and the third flow port 103b are in communication through the first housing chamber 401b and the second communication hole corresponding to the third flow port 103b, and the second sub-flow port 105b and the second flow port 102b are in communication through the chamber 208b and the first communication hole corresponding to the second flow port 102b.

[0090] In one embodiment, the drive device 300b further includes a return member 304b, which is provided between a first magnetic attraction structure 310b and a second magnetic attraction structure 320b, and the return member 304b is used to move the second magnetic attraction structure 320b away from the first magnetic attraction structure 310b.

[0091] Referring to Figure 9, a housing groove is provided at one end of the magnetic attraction portion 321b facing the second magnetic attraction structure 320b, the return member 304b may be a compression spring, the return member 304b is located in the housing groove, one end of the return member 304b is connected to the bottom of the housing groove, and the other end of the return member 304b is connected to the first magnetic attraction structure 310b.

[0092] For example, referring to Figure 9, in the de-energized state, the second magnetic attraction structure 320b is in a separated position, and referring to Figure 10, at the moment of energization switching, the second magnetic attraction structure 320b moves toward the first magnetic attraction structure 310b, the contact surface 32211b of the limiting boss 3221b contacts the surface of the top plate 204b of the valve core 200b away from the first magnetic attraction structure 310b, the return member 304b and the buffer member 303b are both in a compressed state, and the top of the valve core 200b and the magnetic attraction part 321b A buffer gap 600b is present between them. Referring to Figure 12, when energized, the second magnetic attraction structure 320b continues to move toward the first magnetic attraction structure 310b, and moves the valve core 200b toward the first magnetic attraction structure 310b until the second magnetic attraction structure 320b moves to the attraction position. At this time, the buffer member 303b releases energy and presses the valve core 200b toward the magnetic attraction part 321b until the top of the valve core 200b contacts the magnetic attraction part 321b.

[0093] In one embodiment, the shaft rod 322b is a hollow rod that extends through both ends, and a through hole is provided at the bottom of the housing groove. The hollow rod communicates with the housing groove through the through hole, thereby reducing the resistance experienced during the movement of the valve core 200b and improving the smoothness of the movement of the valve core 200b.

[0094] In one embodiment, a plurality of grooves 403b are provided on the circumferential side wall of the valve cover 400b, and the plurality of grooves 403b are spaced apart along the axial direction of the valve cover 400b, with the first and second communication holes located at the bottom of the grooves 403b, respectively.

[0095] In this embodiment, the groove 403b is an annular groove, ensuring that the fluid flows within the chamber 208b.

[0096] In one embodiment, referring to Figure 17, both the first communication hole 4021b and the second communication hole 4022b include a plurality of sub-communication holes, which are spaced apart along the circumferential direction of the groove 403b. In this configuration, fluid flows out from multiple sub-communication holes on the same groove 403b, thereby increasing the fluid flow area, which is particularly suitable for large-diameter valve bodies.

[0097] In one embodiment, in order to increase the fluid flow area, shorten the travel stroke of the valve core 200b, and improve the efficiency of flow path switching, the sub-communication hole is an elongated hole, and the length of the elongated hole along the circumferential direction of the valve cover 400b is greater than the length of the elongated hole along the axial direction of the valve cover 400b.

[0098] Since the circumferential length of the elongated valve cover 400b is greater than the axial length of the elongated valve cover 400b, the axial dimension of the valve cover 400b can be reduced while ensuring a sufficiently large flow area of ​​the elongated hole. Furthermore, the movement stroke of the valve core 200b within the first housing chamber 401b can be shortened, improving the efficiency of flow path switching.

[0099] For example, the elongated hole may be, but is not limited to, an oblong hole, an elongated hole, or an elliptical hole.

[0100] In one embodiment, referring to Figure 9, the solenoid valve further includes a sleeve 106b, which is provided at one end of the valve seat 100b, and the drive unit 300b further includes an electromagnetic coil 305b, the sleeve 106b is inserted into the central chamber of the electromagnetic coil 305b, and at least a portion of the first magnetic attraction structure 310b and the second magnetic attraction structure 320b are located within the sleeve 106b.

[0101] The number of the first distribution port 101b, the second distribution port 102b, and the third distribution port 103b may each be one, or the number of at least one of the first distribution port 101b, the second distribution port 102b, and the third distribution port 103b may be multiple. For example, the number of the first distribution port 101b may be two, and the number of the second distribution port 102b and the third distribution port 103b may each be one.

[0102] In one embodiment, the opening directions of the first flow port 101b, the second flow port 102b, and the third flow port 103b are all perpendicular to the axis of the valve cover 400b. With this configuration, the valve core 200b does not need to overcome differential pressure when moving, and rapid switching of the flow path can be achieved under zero differential pressure.

[0103] In one possible design of this embodiment, there are two first flow ports 101b, the two first flow ports 101b are a first sub-flow port 104b and a second sub-flow port 105b, the first sub-flow port 104b communicates with a second housing chamber 201b, a chamber 208b is formed between the outer wall of the valve core 200b and the inner wall of the valve cover 400b, the chamber 208b is separated from the second housing chamber 201b, the valve cover 400b further includes a third communication hole 4023b, the third communication hole 4023b corresponds to the position of the second sub-flow port 105b, and when the second magnetic attraction structure 320b is in the separation position, and in the process of moving from the separation position to the transition position, the first sub-flow port 10 4b and the second flow port 102b are connected via the second housing chamber 201b, the through hole, the first housing chambers 401b located at both ends of the valve core 200b, and the first communication hole; the second sub-flow port 105b and the third flow port 103b are connected via the third communication hole, the chamber 208b, and the second communication hole; when the second magnetic attraction structure 320b is in the attraction position, the first sub-flow port 104b and the third flow port 103b are connected via the portion of the first housing chamber 401b located outside the chamber 208b, and the second communication hole; and the second sub-flow port 105b and the second flow port 102b are connected via the third communication hole, the chamber 208b, and the first communication hole.

[0104] Specifically, there are two first flow ports, which are the first sub-flow port 104b and the second sub-flow port 105b, respectively. The first sub-flow port 104b communicates with the second containment chamber 201b. The sealing members provided between both sides of the groove 403b and the inner wall of the valve seat 100b are referred to as the first sealing members 404b. There are four first sealing members 404b, meaning that there is one groove 403b between each of two adjacent first sealing members 404b. In this configuration, sealing between the valve cover 400b and the valve seat 100b is achieved, and it is ensured that each of the first flow ports 101b, the second flow port 102b, and the third flow port 103b communicates only with their respective communication holes. Furthermore, accuracy of the flow path switching route can be ensured.

[0105] For example, the first sealing member 404b may be a sealing ring.

[0106] The number of grooves 403b can be selected according to the number of first flow ports 101b, second flow ports 102b, and third flow ports 103b.

[0107] In one embodiment, the solenoid valve further includes a retaining member 500b, which is installed in the valve chamber and used to support the valve core 200b, and the lumen of the retaining member 500b communicates with a second housing chamber 201b.

[0108] For example, the material of the fastening member 500b is metal.

[0109] In a second possible design of this embodiment, referring to Figure 13, there is one of each of the first flow port 101b, the second flow port 102b, and the third flow port 103b. There is one first flow port 101b, and in the non-energized state, the first flow port 101b and the second flow port 102b are connected via the second housing chamber 201b, the through hole 202b, and the first communication hole 4021b corresponding to the second flow port 102b. Referring to Figure 14, in the conductive state, flow between the first flow port 101b and the third flow port 103b is achieved by flowing through the first housing chamber 401b and the second communication hole 4022b corresponding to the third flow port 103b, thereby achieving flow path switching.

[0110] In this second possible design, the position of the first flow port 101b may be the same as the position of the second sub-flow port 105b shown in Figure 1, a chamber 208b is formed between the outer wall of the valve core 200b and the inner wall of the valve cover 400b, the chamber 208b is separated from the second housing chamber 201b, the valve cover 400b further includes a third communication hole, the third communication hole corresponds to the position of the second sub-flow port 105b, and the second magnetic attraction structure When the structure 320b is in the separation position, and during the process of moving from the separation position to the transition position, the second sub-flow port 105b and the third flow port 103b are in communication through the third communication hole, the chamber 208b, and the second communication hole, and when the second magnetic attraction structure 320b is in the attraction position, the second sub-flow port 105b and the second flow port 102b are in communication through the third communication hole, the chamber 208b, and the first communication hole. In this state, when the system is not energized, the first flow port 101b and the third flow port 103b are connected via the chamber 208b and the second communication hole 4022b corresponding to the third flow port 103b, and when the system is energized, the first flow port 101b and the second flow port 102b are connected via the chamber 208b and the first communication hole 4021b corresponding to the second flow port 102b.

[0111] Furthermore, if the first flow port 101b is the fluid inlet, the second flow port 102b and the third flow port 103b are the fluid outlets, and if the first flow port 101b is the fluid outlet, the second flow port 102b and the third flow port 103b are the fluid inlets.

[0112] This embodiment further provides a valve assembly that can be used independently as an insertion valve.

[0113] In this embodiment, the solenoid valve, excluding the valve seat, forms the valve assembly together.

[0114] Referring to Figures 19 to 21, the valve assembly according to this embodiment includes a valve cover 400b, a valve core 200b, and a drive unit 300b, the valve cover 400b having a first housing chamber 401b, at least one first communication hole 4021b and at least one second communication hole 4022b, the valve core 200b is located in the first housing chamber 401b and has a second housing chamber 201b, the drive unit 300b includes a first magnetic attraction structure 310b and a second magnetic attraction structure 320b, the valve core 200b is connected to the second magnetic attraction structure 320b and the second magnetic attraction structure 320b is the first The second magnetic attraction structure 320b is attracted to or separated from the first magnetic attraction structure 310b by magnetic force, and the second magnetic attraction structure 320b has a separation position, a transition position, and an attraction position which are sequentially provided along the direction approaching the first magnetic attraction structure 310b, and when the second magnetic attraction structure 320b is in the separation position, and in the process of moving from the separation position to the transition position, the valve core 200b is in a stationary state and the second housing chamber 201b is in communication with the first communication hole 4021b, and when the second magnetic attraction structure 320b moves from the transition position to the attraction position, the second housing chamber 201b is in communication with the second communication hole 4022b.

[0115] Referring to Figure 19, the valve assembly according to this embodiment, when the second magnetic attraction structure 320b is in the separation position and during the process of moving to the transition position, the valve core 200b is kept stationary. At this time, the second magnetic attraction structure 320b does not need to overcome resistance such as differential pressure and frictional force acting on the valve core 200b, and the second housing chamber 201b is connected to the first communication hole. Under the action of the drive device 300b, the second magnetic attraction structure moves in a direction approaching the first magnetic attraction structure under the action of electromagnetic force. The shorter the distance between the second magnetic attraction structure 320b and the first magnetic attraction structure 310b, the greater the electromagnetic force between them. The electromagnetic force when the air suction structure 320b is in the transition position is greater than the electromagnetic force when the second magnetic attraction structure 320b is in the separation position. Referring to Figure 20, when the second magnetic attraction structure 320b moves to the transition position, the large electromagnetic force allows the second magnetic attraction structure 320b to overcome resistances such as differential pressure and frictional force acting on the valve core, and smoothly moves the valve core 200b toward the first magnetic attraction structure 310b until the second magnetic attraction structure 320b moves to the suction position. Referring to Figure 13, the second housing chamber 201b communicates with the second communication hole 4022b, achieving smooth switching between different flow paths.

[0116] In one embodiment, as shown in Figure 15, the valve core 200b includes a pipe body 203b and a top plate 204b, the lumen of the pipe body 203b is a second housing chamber 201b, the top plate 204b is fixedly connected to one end of the pipe body 203b, the other end of the pipe body 203b is provided as an opening, the top plate 204b has a through hole, and the second housing chamber 201b communicates with the first housing chambers 401b at both ends of the valve core 200b.

[0117] In one embodiment, as shown in Figures 12 to 13, the second magnetic attraction structure 320b includes a magnetic attraction part 321b, an axial rod 322b, and a buffer member 303b. One end of the magnetic attraction portion 321b is attracted to or separated from the first magnetic attraction structure 310b by magnetic force, and the other end is connected to the shaft rod 322b. As shown in Figure 16, a position-restricting boss portion 3222b is provided on the portion of the shaft rod 322b located within the second housing chamber 201b. The buffer member 303b is fitted onto the shaft rod 322b and is located between the position-restricting boss portion 3222b and the top plate 204b. In the process of the second magnetic attraction structure 320b moving from the separation position to the transition position, the buffer member 303b is compressed and the valve core 200b is stationary. In the process of the second magnetic attraction structure 320b moving from the transition position to the attraction position, the buffer member 303b is compressed again and the shaft rod 322b moves the valve core 200b in a direction toward the first magnetic attraction structure 310b.

[0118] In one embodiment, a plurality of grooves 403b are provided on the circumferential side wall of the valve cover 400b, and the plurality of grooves 403b are spaced apart along the axial direction of the valve cover 400b, with the first communication hole and the second communication hole located at the bottom of the grooves 403b, respectively.

[0119] In one embodiment, both the first communication hole 4021b and the second communication hole 4022b include a plurality of sub-communication holes, which are spaced apart along the circumferential direction of the groove 403b.

[0120] Since the structure of the valve core and valve cover in this embodiment is the same as that of the solenoid valve in this embodiment, a detailed explanation is omitted here.

[0121] It should be understood that the present invention is not limited to the detailed structural and arrangement configurations of the components proposed herein. The present invention may have other embodiments and can be realized and carried out in various forms. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and limited herein extends to all alternative combinations of two or more individual features mentioned or evident herein and / or in the drawings. All of these different combinations constitute multiple alternative aspects of the present invention. The embodiments described herein illustrate the best known modes for carrying out the present invention and are intended to make the present invention available to those skilled in the art.

Claims

1. The valve comprises a valve cover, a valve core, and a drive mechanism, wherein the valve cover has a first housing chamber, the valve core is located within the first housing chamber, and the drive mechanism can drive the valve core to move along the inner wall of the first housing chamber. The valve core has a second housing chamber, a chamber is formed between the valve core and the valve cover, and the second housing chamber communicates with the first housing chamber outside the chamber. A valve assembly in which the fluid flowing into the valve cover includes at least a first branch passage and a second branch passage, the first branch passage flows out through a first passage in which the chamber is located, and the second branch passage flows out through a second passage located outside the chamber.

2. The drive unit includes an electromagnetic coil, a shaft rod, a fixed core, and a movable core, the valve assembly further includes a socket, the socket fitted to the outside of the fixed core and the movable core, the electromagnetic coil fitted to the outside of the socket, the fixed core fixedly connected to the socket, the movable core movably mounted within the socket, and the valve core connected to the movable core via the shaft rod. The valve core has a first working position and a second working position, The valve assembly according to claim 1, wherein when the movable core and the fixed core are attracted together by magnetic force, the valve core is in a second working position, and when the movable core and the fixed core are separated to the furthest distance apart, the valve core is in a first working position, or when the movable core and the fixed core are attracted together by magnetic force, the valve core is in a first working position, and when the movable core and the fixed core are separated to the furthest distance apart, the valve core is in a second working position.

3. The valve assembly according to claim 2, further comprising a return member, the return member provided between the fixed core and the movable core.

4. The valve assembly according to claim 1, wherein the valve core includes a tubular body and a top plate, the top plate being fixedly connected to one end of the tubular body, the top plate having a through hole, the other end of the tubular body being open and having an annular projection, the edge of the top plate and the edge of the annular projection being sealed and connected to the inner wall of the valve cover, thereby forming the chamber between the outer wall of the tubular body, the inner wall of the valve cover, the top plate and the annular projection, the lumen of the tubular body being the second housing chamber, and the second housing chamber communicating with the first housing chambers at both ends of the valve core.

5. The valve cover has at least one first communication hole and at least one second communication hole, the drive device includes a first magnetic attraction structure and a second magnetic attraction structure, and the valve core is connected to the second magnetic attraction structure. The second magnetic attraction structure is attracted to or separated from the first magnetic attraction structure by magnetic force, wherein the second magnetic attraction structure has a separation position, a transition position, and an attraction position arranged in order in a direction approaching the first magnetic attraction structure. When the second magnetic attraction structure is in the separation position, and during the process of moving from the separation position to the transition position, the valve core is in a stationary state, and the second housing chamber is in communication with the first communication hole. The valve assembly according to claim 1, wherein when the second magnetic attraction structure moves from the transition position to the attraction position, the second housing chamber communicates with the second communication hole.

6. The valve assembly according to claim 5, wherein the second magnetic attraction structure includes a magnetic attraction portion, a shaft rod, and a buffer member, one end of the magnetic attraction portion is attracted to or separated from the first magnetic attraction structure by magnetic force, the other end is connected to the shaft rod, a position-restricting boss portion is provided on the portion of the shaft rod located in the second housing chamber, the buffer member is fitted to the shaft rod and is located between the position-restricting boss portion and the top plate, the buffer member is compressed as the second magnetic attraction structure moves from the separation position to the transition position and the valve core is in a stationary state, and the buffer member is compressed as the second magnetic attraction structure moves from the transition position to the attraction position and the shaft rod moves the valve core in a direction approaching the first magnetic attraction structure.

7. The valve assembly according to any one of claims 1 to 6, wherein the outer surface of the valve cover in the circumferential direction is provided with a plurality of grooves along its axial direction, a communication hole is provided at the bottom of the grooves, and two adjacent grooves facing the valve core communicate with each other via the chamber.

8. The valve assembly according to claim 7, wherein the communication hole includes a plurality of sub-communication holes, and the plurality of sub-communication holes are spaced apart along the circumferential direction of the groove.

9. The valve assembly according to claim 8, wherein the sub-communication hole is an elongated hole, and the length of the elongated hole along the circumferential direction of the valve cover is greater than the length of the elongated hole along the axial direction of the valve cover.

10. The present invention comprises a valve seat and a valve assembly according to any one of claims 1 to 9, wherein the valve seat has a valve chamber, the valve cover is fixedly mounted within the valve chamber, the valve seat is provided with a first sub-flow port, a second sub-flow port, a second flow port, and a third flow port communicating with the valve chamber, the valve cover is provided with communication holes at positions corresponding to at least the second sub-flow port, the second flow port, and the third flow port, the communication holes communicating with the chamber, or the communication holes communicating with a first housing chamber outside the chamber. The valve core has a first working position and a second working position, When the valve core is in the first working position, the first passage includes, in order, a second sub-flow port, a communication hole corresponding to the second sub-flow port, the chamber, a communication hole corresponding to the second flow port, and the second flow port; the second passage is configured to include, in order, the first sub-flow port, a first housing chamber located outside the chamber, a communication hole corresponding to the third flow port, and the third flow port. Solenoid valve, wherein when the valve core is in the second working position, the first passage includes a second sub-flow port communicating in sequence, a communication hole corresponding to the second sub-flow port, the chamber, a communication hole corresponding to the third flow port, and the third flow port, and the second passage is configured to include a first sub-flow port communicating in sequence, a first housing chamber located outside the chamber, a communication hole corresponding to the second flow port, and the second flow port.

11. The solenoid valve according to claim 10, wherein a plurality of grooves are provided on the circumferential outer surface of the valve cover along its axial direction, and sealing members are provided between both sides of the grooves and the inner wall of the valve seat.

12. A stopper is provided on the inner wall of the valve chamber, and when the valve core is in a second working position, the valve core and the stopper are in contact with each other, according to any one of claims 10 to 11.

13. The valve seat comprises a valve seat and a valve assembly according to any one of claims 5 or 6, wherein the valve seat has a valve chamber and at least one first flow port, at least one second flow port, and at least one third flow port communicating with the valve chamber, at least a portion of the valve cover is located within the valve chamber, the first communication hole is located at a position corresponding to the second flow port of the valve cover, and the second communication hole is located at a position corresponding to the third flow port of the valve cover. When the second magnetic attraction structure is located in the separation position, and during the process of moving from the separation position to the transition position, at least one first flow port is in communication with the second flow port. A solenoid valve in which, when the second magnetic attraction structure moves from the transition position to the attraction position, at least one of the first flow ports communicates with the third flow port.

14. The number of the first flow ports is one, and when the second magnetic attraction structure is located in the separation position, and in the process of moving from the separation position to the transition position, the first sub-flow port and the second flow port are in communication through the second housing chamber, the through hole, the portions of the first housing chamber located at both ends of the valve core, and the first communication hole, and when the second magnetic attraction structure is located in the attraction position, the first sub-flow port and the third flow port are in communication through the first housing chamber facing the second communication hole, and the second communication hole, Alternatively, the solenoid valve according to claim 13, wherein the number of first flow ports is one, a chamber is formed between the outer wall of the valve core and the inner wall of the valve cover, the chamber is separated from the second housing chamber, the valve cover further includes a third communication hole, the third communication hole corresponds to the position of the second sub-flow port, when the second magnetic attraction structure is in the separation position and in the process of moving from the separation position to the transition position, the second sub-flow port and the third flow port are in communication through the third communication hole, the chamber and the second communication hole, and when the second magnetic attraction structure is in the attraction position, the second sub-flow port and the second flow port are in communication through the third communication hole, the chamber and the first communication hole.

15. The number of the first flow ports is two, and the two first flow ports are a first sub-flow port and a second sub-flow port, the first sub-flow port communicates with the second housing chamber, a chamber is formed between the outer wall of the valve core and the inner wall of the valve cover, the chamber and the second housing chamber are separated, the valve cover further includes a third communication hole, the third communication hole corresponds to the position of the second sub-flow port, when the second magnetic attraction structure is in the separation position and in the process of moving from the separation position to the transition position, the space between the first sub-flow port and the second flow port is the second housing chamber, the The solenoid valve according to claim 13, wherein the through hole communicates with the first housing chambers located at both ends of the valve core and the first communication hole, the second sub-flow port and the third flow port communicate with each other through the third communication hole, the chamber and the second communication hole, when the second magnetic attraction structure is in the attraction position, the first sub-flow port and the third flow port communicate with each other through the portion of the first housing chamber located outside the chamber and the second communication hole, and the second sub-flow port and the second flow port communicate with each other through the third communication hole, the chamber and the first communication hole.

16. The solenoid valve according to claim 10 or 15, wherein the directions of the first sub-flow port, the second sub-flow port, the second flow port, and the third flow port are all perpendicular to the axis of the valve cover.

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