A solenoid valve

Abstract

A solenoid valve, characterized in that it includes a valve body, a valve core, a first valve plug, a connecting seat and a moving iron core assembly, the connecting seat is fixedly connected to the valve body, the valve core is fixedly connected or limit-connected to the connecting seat, or the valve core is fixedly connected or limit-connected to the valve body; the valve body has a first valve port, the valve core has a second valve port, the first valve plug abuts against the connecting seat and the first valve plug abuts against the valve body, the first valve plug includes a blocking portion, a sealing portion and a deformation portion, the blocking portion can approach or move away from the first valve port, the sealing portion is sealingly connected to the valve core, when the blocking portion is relatively away from the first valve port, the deformation portion is deformed, and the moving iron core assembly includes a second valve plug, and the second valve plug can approach or move away from the second valve port.

Description

[Technical field]

[0001] The invention relates to the technical field of electromagnetic control, and in particular to a solenoid valve. [Background technology]

[0002] like Figure 1 The solenoid valve structure shown includes components such as a valve body, a core body 6, a core body sleeve 10, a sealing ring 5, a diaphragm 12, a limiter 11 and a spring 9. The valve body is provided with a valve port. When the coil is energized, the moving iron core 8 moves upward close to the static iron core, and the valve port is opened. Under the action of the pressure difference, the core body sleeve 10, the sealing ring 5, the diaphragm 12 and the limiter 11 move upward together, and the spring 9 is compressed. During the opening and closing process of the solenoid valve of this structure, the sealing ring 5 also moves with the core body 6, and in order to ensure the sealing of the part where the sealing ring 5 is located, the sealing ring 5 needs to have a certain amount of compression. Therefore, the solenoid valve needs to overcome a relatively large resistance during the opening process. [Summary of the invention]

[0003] The object of the present invention is to provide a solenoid valve with a new structure, which can ensure the sealing reliability and relatively reduce the resistance encountered by the solenoid valve when opening the valve.

[0004] A solenoid valve comprises a valve body, a valve core, a first valve plug, a connecting seat and a moving iron core assembly, wherein the connecting seat is fixedly connected to the valve body, the valve core is fixedly connected or limit-connected to the connecting seat, or the valve core is fixedly connected or limit-connected to the valve body, the valve body has a first valve port, the valve core has a second valve port, the first valve plug abuts against the connecting seat and the first valve plug abuts against the valve body, the first valve plug comprises a blocking portion, a sealing portion and a deformation portion, the blocking portion can approach or move away from the first valve port, the sealing portion is sealingly connected to the valve core, when the blocking portion is relatively away from the first valve port, the deformation portion is deformed, and the moving iron core assembly comprises a second valve plug, and the second valve plug can approach or move away from the second valve port.

[0005] Through the optimized design of the solenoid valve structure, the present invention enables the first valve plug to include a blocking portion, a sealing portion and a deformation portion. The blocking portion can be close to or away from the first valve port, and the sealing portion is sealed to the valve core. When the blocking portion is relatively away from the first valve port, the deformation portion is deformed, thereby ensuring the sealing reliability and relatively reducing the resistance encountered by the solenoid valve when opening the valve.

Brief Description of the Drawings

[0006] Figure 1 A cross-sectional view of the overall structure of a solenoid valve of background technology;

[0007] Figure 2 for Figure 1 An enlarged schematic diagram of the solenoid valve core structure;

[0008] Figure 3 A three-dimensional schematic diagram of the solenoid valve body, coil and magnetic conductive member provided by the present invention;

[0009] Figure 4 A cross-sectional view of the valve body structure of the solenoid valve provided by the present invention;

[0010] Figure 5 A schematic diagram of an explosion of a solenoid valve provided by the present invention;

[0011] Figure 6 A first embodiment of the solenoid valve provided by the present invention;

[0012] Figure 7 for Figure 6 An enlarged schematic diagram of the structure of the matching part of the valve core and the first valve plug of the solenoid valve;

[0013] Figure 8 for Figure 6 A schematic diagram of the structure of a first valve plug of a solenoid valve;

[0014] Fig. 9 for Figure 6 An enlarged schematic diagram of the valve core structure of the solenoid valve;

[0015] Fig.10 A schematic cross-sectional view of another valve plug structure of the solenoid valve provided by the present invention;

[0016] Fig.11 A second embodiment of the solenoid valve provided by the present invention;

[0017] Fig.12 for Fig.11 Schematic diagram of the valve core structure of the solenoid valve [Specific implementation method]

[0018] The technical solution provided by the present invention is described in detail below in conjunction with the drawings in the specification. It should be noted that the present invention focuses on protecting the structure of the valve core and the first valve plug and the matching relationship between them and various components. For other structures of the solenoid valve, such as the static iron core, the moving iron core assembly, the coil component and other structures, other structural changes can be adaptively made.

[0019] The present invention provides a solenoid valve, including a valve body 10, a valve core 20, a first valve plug 30, a connecting seat 50 and a moving iron core assembly 400, wherein the connecting seat 50 is fixedly connected to the valve body 10, the valve core 20 is fixedly connected or limitedly connected to the connecting seat 50, or the valve core 20 is fixedly connected or limitedly connected to the valve body 10, the valve body 10 has a first valve port 101, the valve core 20 has a second valve port 201, the first valve plug 30 abuts against the connecting seat 50 and the first valve plug 30 abuts against the valve body 10, the first valve plug 30 includes a blocking portion 301, a sealing portion 302 and a deformation portion 304, the blocking portion 30 can approach or move away from the first valve port 101, the sealing portion 302 The deforming portion 304 is close to the blocking portion 301 and the deforming portion 304 is close to the sealing portion 302. The deforming portion 304 is located between the sealing portion 302 and the blocking portion 301. In the axial direction, the sealing portion 302 is relatively located above the deforming portion 304. The sealing portion 302 is far away from the blocking portion 30 relative to the deforming portion 304. When the blocking portion is far away from the first valve port 101, the deforming portion 304 can be deformed. The moving iron core assembly 400 includes a moving core body 401, a second valve plug 403 and a first elastic member 200. The moving core body 401 is limitedly connected to the second valve plug 403. The second valve plug 403 can approach or move away from the second valve port 201. The present invention optimizes the design of the solenoid valve structure. When the solenoid valve is in a power-off state, the second valve plug 403 is abutted against the second valve port 201 by the action of the first elastic member 200, and the blocking portion 301 of the first valve plug 30 is abutted against the first valve port 101; when the coil component of the solenoid valve is energized, the moving iron core assembly 400 moves toward the static iron core 70 under the action of the electromagnetic force, overcoming the spring force of the first elastic member 200 and causing the second valve plug 403 to move away from the second valve port 201. The medium above the first valve plug 30 is depressurized, and the medium below the first valve plug 30 is depressurized. The pressure is relatively large, and the first valve plug is pushed upward under the action of the pressure difference force, so that the first valve plug 30 is away from the first valve port 101, and the deformation part 304 is deformed and contracted, and the sealing part 302 and the sealing part where the valve core 20 are located remain relatively motionless to form a static sealing state, and the sealing reliability is better. Compared with the sealing structure of the solenoid valve in the background technology, the sealing position where the valve core and the first valve plug cooperate in the solenoid valve provided by the present invention greatly reduces the friction of the sealing interference, and there is only the resistance of the deformation part when the first valve port is opened, which greatly reduces the development resistance of the solenoid valve.

[0020] The following structure Figure 3-10 The first embodiment of the present invention is described in detail. Figure 3 The solenoid valve shown in the figure includes a valve body 10, a coil component 2 and a magnetic conductor 3. After the coil component 2 and the magnetic conductor 3 are assembled, they can be connected to the valve body 10. Figure 4The solenoid valve shown includes a valve body 1, which is provided with a first valve port 101, an inlet 102, and an outlet 103. An interface and a pipe claw are also provided near the inlet 102 for connecting an external connecting pipe. The valve body 1 also includes a mounting groove 104 and a groove wall 105. The mounting groove 104 is located relatively above the first valve port 101 and is used to cooperate with the first valve plug 30. The groove wall 105 extends and protrudes upward.

[0021] like Figure 5-6The solenoid valve structure shown also includes components such as a valve core 20, a first valve plug 30, and a connecting seat 50. The valve core 20 is generally an inverted convex structure and can be formed by metal processing such as stainless steel. The connecting seat 50 is fixedly connected to the valve body 1. The solenoid valve may include a mounting plate 500 and a sealing member 60. The mounting plate 500, the sealing member 60, the connecting seat 50, the valve core 20, the first valve plug 30 and the valve body 10 can be locked and pressed by screws 170 to prevent leakage of the medium. In this application, the screw method can be used. The connection seat 50 is fixedly connected to the valve body 1 by a method of press-fitting the connection seat 50 into the valve body 1. The connection seat 50 has a foot 501 and a protrusion 502. The foot 501 extends downward from the connection seat 50 and abuts against the first valve plug 30. The first valve plug 30 is generally in a positive convex shape and can be made of rubber material to achieve better sealing with the first valve port 101. The first valve plug 30 includes a blocking portion 301, a sealing portion 302, and a protrusion 502. 2. The deformation portion 304, the second deformation portion 305 and the extension portion 306, the extension portion 306 radially extends outward from the second deformation portion 305, the extension portion 306 is adapted to the mounting groove 104, the extension portion 306 is against the foot portion 501, the first valve plug 30 is roughly limited on the valve body 1 as a whole through the connecting seat 50, the deformation portion 304 and the second deformation portion 305 at least include a thin-walled structure, when the solenoid valve is energized and the first valve plug 30 is relatively far away from the first valve port 101, the deformation portion 304 and the second deformation portion 305 can be deformed by the pressure difference force. The second deformation portion 305 is roughly a thin-walled arch structure, with an arched groove 3051. The arched groove 3051 and the groove wall 105 are offset to reduce the hidden danger of the extension portion 306 moving toward the blocking portion 301, and further prevent the extension portion 306 from separating from the installation groove 104 to ensure the actuation reliability of the first valve plug 30. The blocking portion 301 is roughly a flat plate structure and can approach or move away from the first valve port 101.The valve core 20 is fixedly connected or limitedly connected to the connecting seat 50. The valve core 20 includes a flange portion 202, which can be press-fitted with the connecting seat 50 by interference fit; or a groove or a convex groove can be provided on the connecting seat 50, and the outer wall of the flange portion 202 of the valve core 20 is correspondingly provided with a convex groove or a groove to achieve limited connection with the connecting seat 50; the solenoid valve also includes a mounting plate 500 and a sealing member 60. The mounting plate 500, the sealing member 60, the connecting seat 50, the valve core 20, the first valve plug 30 and the valve body 10 can be locked and pressed by screws 170 to prevent leakage of the medium. The upper end of the flange portion 202 of the valve core 20 abuts against the sealing member 60, and the lower end is against the protrusion 50 2 is limited in the connecting seat 50 as a whole in a manner of abutting each other. The valve core 20 is provided with a first balancing hole 206, and the first valve plug 30 is provided with a second balancing hole 303. After the medium enters from the inlet 102 of the valve body 1, it first passes through the second balancing hole 303 to enter the top of the first valve plug 30, and then passes through the first balancing hole 206 to enter the top of the valve core 20. The mounting plate 500 and the connecting seat 50 are abutted to form a seam portion. The sealing member 60 is respectively abutted against the mounting plate 500, the connecting seat 50 and the valve core 20 and covers the seam portion to prevent the medium from leaking outward from the seam portion. When the solenoid valve is in a closed state, the pressure above the valve core 20 is roughly balanced with the pressure below the valve core 20.

[0022] The valve core 20 has a through hole 205 and a second valve port 201, and also includes a valve port portion 208, a matching groove 203 and a guide portion 204. The second valve port 201 is connected to the through hole 205. The valve port portion 208 refers to the area where the second valve port 201 is located. The matching groove 203 is located between the valve port portion 208 and the guide portion 204. The matching groove 203 is relatively close to the second valve port 201, and the guide portion 204 is relatively far from the second valve port 201. The guide portion 204 is located below the matching groove 203. The moving iron core assembly 400 includes a second valve plug 403. Under normal conditions, that is, when the coil component is not energized, the second valve plug 403 is against the second valve port 201. When the coil component is energized, the moving iron core assembly 400 moves upward as a whole under the action of the electromagnetic force, and the second valve plug 403 is relatively far away from the second valve port 201. The medium is depressurized through the through hole 205, and the pressure above the valve core 20 is reduced. The first valve plug 30 is pushed open under the action of the pressure difference force, so that the first valve plug 30 moves upward to open the first valve port 101. The first valve plug 30 is limitedly connected to the valve core 20. The first valve plug 30 is generally located above the first valve port 101 as a whole and can be close to or away from the first valve port 101. The sealing portion 302 is against the matching groove 203 to form a static seal between the first valve plug 30 and the valve core 20. The guide portion 204 guides the sealing portion 302 so that the sealing portion 302 can be more easily embedded in the valve core 20. The deformation portion 304 is located between the sealing portion 302 and the blocking portion 301. The deformation portion 304 is generally a thin-walled cone structure and is relatively close to the blocking portion 301. The sealing portion 302 is relatively far away from the blocking portion 301. There is a large gap between the deformation portion 304 and the guide portion 204. The deformation portion 304 can be telescopically deformed. When the power is off in the normal state, when the blocking portion 301 closes the first valve port 101, the deformation portion 304 is generally in an extended state and has only an initial deformation state, and no obvious deformation occurs. When the coil component is energized, the blocking portion 301 is relatively far away from the first valve under the action of the pressure difference. The mouth 101 is lifted upward, and the deformation part 304 is deformed and contracted. Since the valve core 20 is fixedly connected to the connecting seat 50 and the sealing part 302 is sealed with the matching groove 203, the sealing part 302 and the sealing part where the matching groove 203 are located form a static sealing state. Therefore, compared with the sealing structure of the solenoid valve structure of the background technology, in order to ensure the reliable sealing of the first valve plug 30 and the valve core 20, the compression requirement of the sealing part 302 is greatly reduced. During the valve opening process of the solenoid valve, the sealing part 302 always forms a static sealing state with the valve core 20 and will not follow the movement in the up and down directions, which increases the sealing reliability and can greatly reduce the valve opening resistance during the valve opening process. When the first valve port 101 is opened, it is only subject to the resistance of the deformation part 304, which is almost negligible. The requirement for the electromagnetic driving force is greatly reduced, and the miniaturized design of the coil part can be realized, so that the valve can be opened smoothly even with a small driving force, and the valve opening process of the solenoid valve can be relatively smooth and reliable.

[0023] The solenoid valve can also include a second elastic member 300, which is sleeved on the outer periphery of the deformation portion 304 and the sealing portion 302, and the lower end of the second elastic member 300 is against the blocking portion 301, and the upper end of the second elastic member 300 is against the valve port portion 208. The second elastic member 300 is added to assist the deformation portion 304 in stretching. After the deformation portion 304 is repeatedly fatigued, there may be a risk of deformation to a certain extent. After the second elastic member 300 is added, when closing the first valve port 101, the deformation portion 304 can be assisted in stretching to relatively ensure that the first valve plug 30 can smoothly be against the first valve port 101. In the embodiment provided by the present application, the first valve plug 30 also includes a second deformation portion 3 05. The second deformation portion 305 is roughly in the shape of a thin-walled arch, which can also perform telescopic deformation. The second deformation portion 305 is located on one side of the blocking portion 301, and the deformation portion 304 is located on the other side of the blocking portion 301 relative to the second deformation portion 305. In the normal power-off state, the second deformation portion 305 stretches and only deforms in the initial state without obvious deformation. When the coil component of the solenoid valve is energized, the blocking portion 301 is relatively away from the first valve port 101 and lifted upward under the action of the pressure difference. Under the joint deformation action of the second deformation portion 305 and the deformation portion 304, the blocking portion 301 as a whole can be lifted upward in a roughly horizontal state, and can move upward more reliably and smoothly to open the first valve port 101.

[0024] It should be noted that, the first valve plug 30 of the solenoid valve provided in the present application may also be provided with only a deformation portion 304 without a second deformation portion, and the blocking portion 301 may be provided as a thin-walled structure that is roughly flat, and the extending portion 306 is limited by the connecting seat 50 and the valve body 1. In the case where only the deformation portion 304 is provided, when the power is on, the blocking portion 301 is lifted upward relatively away from the first valve port 101 due to the pressure difference, but the blocking portion 301 is not lifted upward in an overall horizontal state, but is lifted in a conical manner. However, the same technical effect as mentioned above can also be achieved.

[0025] Combine the following Fig.10Another structure of the first valve plug 30' is introduced. The first valve plug 30' includes a blocking portion 301'. The blocking portion 301' is a thin-walled structure that is roughly in the shape of an inverted trapezoid. The blocking portion 301' includes a second deformation portion 307 and a plate portion 308. The plate portion 308 is roughly in a horizontal structure. The second deformation portion 307 is inclined relative to the plate portion 308. The second deformation portion 307 extends obliquely from the stretching portion toward the plate portion 308. The second deformation portion 307 is located between the stretching portion 306' and the plate portion 308, and one end of the second deformation portion 307 is connected to the stretching portion 306', and the other end is connected to the plate portion 308. The second deformation portion 307 is 07 can be telescopically deformed. When the solenoid valve is in the energized state, the plate portion 308 gradually moves away from the first valve port 101 from the original state of being against the first valve port 101, and is lifted axially upward in an overall horizontal state. The second deformation portion 307 tends to deform in the same horizontal direction as the plate portion 308. Under the joint deformation action of the second deformation portion 307 and the deformation portion 304, the blocking portion 301 as a whole can be lifted upward in a roughly horizontal state as a whole, and can move upward more reliably and smoothly to open the first valve port 101. The relevant technical effects have been introduced in detail in the above content and will not be repeated here.

[0026] The solenoid valve also includes a moving iron core assembly 400, which includes a moving core body 401, a connecting portion 402, a second valve plug 403 and a first elastic member 200. The moving core body 401 can approach or move away from the static iron core 70. The connecting portion 402 is fixedly connected or limit-connected to the moving core body 401 or processed into an insert-molded structure, or the connecting portion 402 and the moving core body 401 can also be an integrally processed structure. When the connecting portion 402 and the moving core body 401 are separated, it is possible to save processing materials for parts and facilitate assembly, and the connecting portion 402 can be made of non-metallic parts, such as plastic parts, which can better achieve the reduction of component products. The second valve plug 403 can be made of rubber material or plastic material, and the connecting portion 402 can limit the second valve plug 403 by crimping deformation and other methods. On the moving iron core assembly, the first elastic member 200 is sleeved on the outer periphery of the connecting part 402 and one end is abutted against the protrusion of the connecting part 402, and the other end is abutted against the mounting plate 500, so that the second valve plug 403 always remains abutted against the second valve port 201 when the solenoid valve is in the power-off state; when the solenoid valve is energized, the moving iron core assembly 400 can overcome the spring force of the first elastic member 200, and the moving iron core assembly 400 moves upward as a whole to approach the static iron core 70, and the second valve plug 403 is relatively far away from the second valve port 201. The solenoid valve also includes a sealing gasket 100, which is sleeved on the groove of the connecting part 402. By setting the sealing gasket 100, the connecting part 402 can be prevented from making noise when it moves upward and contacts the mounting plate 500, and the direct contact between the connecting part 402 and the mounting plate 500 can be prevented to generate noise. The solenoid valve has a valve core accommodating portion 207 , which is substantially defined by the mounting plate 500 and the valve core 20 . The connecting portion 402 , the first elastic member 200 , the second valve plug 403 and the sealing gasket 100 are substantially located in the valve core accommodating portion 207 .

[0027] The solenoid valve also includes a static iron core 70, a magnetically conductive shell 80, and a coil component 90, wherein the static iron core is fixedly connected to the shell 80, the shell 80 roughly covers the coil component 90, and the static iron core 70 is fixedly connected to the sleeve, and the dynamic core body 401 can perform axial lifting and lowering movements along the sleeve wall in the sleeve.

[0028] Combine the following Figure 11-12Another embodiment of the solenoid valve provided by the present invention is introduced, which is different from the first embodiment mainly in the structure of the valve core and the connecting seat. The valve core 20' can be fixedly connected to the valve body 10. The solenoid valve has a valve body accommodating cavity A. The valve core 20' passes through the valve body accommodating cavity A and extends toward the moving iron core assembly 400. Part of the valve core 20' is located in the valve body accommodating cavity A'. The valve core 20' includes a valve core seat 26'. The valve core seat 26' can be press-fitted into the valve body 10 and interfered with the accommodating wall A1 to form the valve core 20 ' is fixedly connected to the valve body 10, or the valve core seat 26' can be matched with the valve body 10 through a transition, or the valve core seat 26' can be matched with the valve body 10 through a small gap. The valve core 20' of the present application also includes a body 23', the body 23' is located above the valve core seat 26', the outer diameter of the valve core seat 26' can be set to be larger than the outer diameter of the body 23', and the valve core 20' also includes a small diameter portion 21' and a large diameter portion 22', and the small diameter portion 21' and the large diameter portion 22' are relatively far away from the valve body 23'. The core seat 26', the large diameter portion 22' is located between the small diameter portion 21' and the body 23', the large diameter portion 22' is closer to the body 23 than the small diameter portion 21', the outer diameter of the large diameter portion 22' is larger than the outer diameter of the small diameter portion 21', and a transition portion 222' is formed between the small diameter portion 21' and the large diameter portion 22', and the transition portion 222' can be a step structure or other structure for abutting against the sealing portion 302 of the first valve plug 30, and the valve core 20' has a second valve port 211', and the second valve port 211' is formed at the small diameter portion 21'. The large diameter portion 21' and the small diameter portion 21' provide a guiding function for the sealing portion 302. Different from the inverted assembly method of the valve core structure and the first valve plug 30 in the first embodiment, the first valve plug 30 can be assembled with the valve core 20' in a normal manner, making the assembly of the first valve plug 30 and the valve core 20' more convenient. The valve core 20' also has a connecting port 24' and a through hole 25'. The connecting port 24' is connected to the outlet channel of the outlet 103 and the through hole 25'. The connecting port 24' is opened on the main body 23'.

[0029] The connecting seat 50' is roughly in a concave shape. The connecting seat 50' is fixedly connected to the valve body 10. The connecting seat 50' has a matching hole portion 502'. The matching hole portion 502' can be matched with the small diameter portion 21' of the valve core 20' with a small gap, or the matching hole portion 502' and the small diameter portion 21' are press-fitted with an interference fit, or the matching hole portion 502' and the small diameter portion 21' are transitionally matched. When the matching hole portion and the small diameter portion adopt an interference or transitional fit, the first valve plug can be first installed into the small diameter portion and then the valve core and the connecting seat can be assembled. It should be noted that the matching method of the valve core seat 26' below the valve core 20' and the valve body and the matching method of the small diameter portion 21' above the valve core 20' and the connecting seat 50' can adopt multiple combinations. It is only necessary to ensure that the valve core 20' can be relatively stably positioned on the valve body 10. The solenoid valve is integrally connected to the valve body 10, and further comprises a first accommodating portion 503' and a second accommodating portion 504', wherein the first accommodating portion 503' and the second accommodating portion 504' are both roughly defined by the connecting seat 50' and the mounting plate 500, and the sealing member 60 is located in the first accommodating portion 503' and respectively abuts against the mounting plate 500 and the connecting seat 50', and the sealing member 60 roughly covers the joint portion between the mounting plate 500 and the connecting seat 50' to prevent the medium from leaking outward from the joint portion, and a part of the moving iron core assembly 400 is located in the second accommodating portion 504', and the connecting seat 50' further comprises a first foot portion 505' extending in the direction of the first valve port 101 to and the second foot 506', the first foot 505' and the second foot 506' are arranged roughly in parallel, the first foot 505' can be press-fitted with the valve body 10 to make the first valve plug 30 as a whole connected with the valve body 10 in a limited position, the solenoid valve also has a receiving groove 501', the second foot 506' roughly forms the receiving groove 501', the receiving groove 501' has a groove bottom wall, part of the second elastic member 300 is located in the receiving groove 501', the second foot 506' positions the second elastic member 300 to prevent it from moving in the radial direction, and one end of the second elastic member 300 abuts against the groove bottom wall, and the other end abuts against the blocking portion 301. The sealing portion 301 of the first valve plug 30 abuts against the small diameter portion 21' and the transition portion 222, the deformation portion 304 cooperates with the large diameter portion 22' with a large gap, the cooperation structure of the first valve plug 30 and the valve core and the related technical effects have been described in detail in the first embodiment and will not be repeated here.

[0030] It should be noted that the ordinal numbers "first, second", the directional words "upper, lower" and the adjectives "big, small" stated in the present invention are explained for convenience based on the drawings in the specification of the present invention and are not any limitations on the structure, shape or order of the parts.

[0031] Specific examples are used in this article for illustration, and the description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A solenoid valve, characterized in that: It includes a valve body, a valve core, a first valve plug, a connecting seat and a moving iron core assembly, wherein the connecting seat is fixedly connected to the valve body, the valve core is fixedly connected or position-limitedly connected to the connecting seat, or the valve core is fixedly connected or position-limitedly connected to the valve body; The valve body has a first valve port, the valve core has a second valve port, the first valve plug abuts against the connecting seat and the first valve plug abuts against the valve body, the first valve plug includes a blocking portion, a sealing portion and a deformation portion, the blocking portion can approach or move away from the first valve port, the sealing portion is sealed and connected to the valve core, when the blocking portion is relatively away from the first valve port, the deformation portion is deformed, the moving iron core assembly includes a second valve plug, the second valve plug can approach or move away from the second valve port, and the deformation portion at least includes a thin-walled structure; The first valve plug also includes a second deformation portion, which includes at least a thin-walled structure. The valve core is provided with a matching groove, and the sealing portion is sealingly connected to the matching groove. The sealing portion and the sealing portion where the matching groove is located form a static sealing state.

2. A solenoid valve according to claim 1, characterized in that: The first valve plug further includes an extension portion, and the second deformation portion is located between the extension portion and the blocking portion. When the blocking portion is relatively far away from the first valve port, the second deformation portion is deformed.

3. A solenoid valve according to claim 2, characterized in that: The valve body is provided with a mounting groove and a groove wall, the extension portion is located in the mounting groove, the extension portion is limited to the valve body by the connecting seat, the second deformation portion is roughly a thin-walled arch-shaped structure, the second deformation portion has an arched groove, and the arched groove is against the groove wall.

4. A solenoid valve according to claim 2, characterized in that: The second deformation portion is substantially in the form of a thin-walled plate, and the second deformation portion obliquely extends from the extending portion toward the blocking portion.

5. The solenoid valve according to claim 1, characterized in that: The valve core is roughly in the shape of an inverted convex letter, has a through hole, and also includes a flange portion, the flange portion is fixedly connected or limit-connected to the connecting seat, the valve core also includes a valve mouth portion, the matching groove and a guide portion, the second valve port is connected to the through hole, the matching groove is located between the valve mouth portion and the guide portion, and the sealing portion is against the matching groove through the guide portion.

6. The solenoid valve according to claim 1, characterized in that: The valve core includes a valve core seat, and the valve core seat and the valve body are interference fit, or the valve core seat and the valve body are transition fit, or the valve core seat and the valve body are clearance fit. The valve core also includes a body, a small diameter portion and a large diameter portion. The small diameter portion and the large diameter portion are far away from the valve core seat relative to the body, and the large diameter portion is located between the small diameter portion and the body. The small diameter portion includes the second valve port, and a transition portion is formed between the small diameter portion and the large diameter portion, and the sealing portion abuts against the transition portion.

7. A solenoid valve according to claim 6, characterized in that: The valve core is also provided with a connecting port and a through hole, the main body has the connecting port, the second valve port, the connecting port and the through hole are connected, the connecting seat is roughly in a concave shape, the connecting seat has a matching hole portion, the small diameter portion and the matching hole portion are clearance fit, or the small diameter portion and the matching hole portion are interference fit, or the small diameter portion and the matching hole portion are transition fit.

8. A solenoid valve according to claim 6 or 7, characterized in that: The connecting seat includes a first foot and a second foot, the first foot and the second foot extend toward the first valve port, the solenoid valve also includes a second elastic member, the second elastic member is located at the outer periphery of the sealing portion and the deformation portion, the solenoid valve has a receiving groove, the second foot roughly forms the receiving groove, the receiving groove has a groove bottom wall, part of the second elastic member is located in the receiving groove, one end of the second elastic member is against the groove bottom wall, and the other end is against the blocking portion.

9. A solenoid valve according to any one of claims 1 to 7, characterized in that: The solenoid valve also includes screws, a mounting plate and a seal, and the mounting plate, the seal, the connecting seat, the valve core, the first valve plug and the valve body are locked by the screws, the mounting plate and the connecting seat are abutted to form a joint, the seal is abutted against the mounting plate, the seal is abutted against the connecting seat, and the seal covers the joint.

10. A solenoid valve according to any one of claims 1 to 7, characterized in that: The moving iron core assembly also includes a moving core body, a connecting portion and a first elastic member. The moving core body is fixedly connected to the connecting portion or is an integral structure. The connecting portion is limitedly connected to the second valve plug. The first elastic member is located at the outer periphery of the connecting portion.

11. The solenoid valve according to claim 10, characterized in that: The solenoid valve further comprises a sealing gasket, and the sealing gasket is located in the groove of the connecting portion.

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