CN113623454A

CN113623454A - Electromagnetic valve

Info

Publication number: CN113623454A
Application number: CN202010382767.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-11-09

Abstract

A solenoid valve is characterized by comprising a valve body, a valve core, a first valve plug, a connecting seat and a movable iron core assembly, wherein the connecting seat is fixedly connected with the valve body, the valve core is fixedly connected or in limited connection with the connecting seat, or the valve core is fixedly connected or in limited connection with the valve body; the valve body is provided with a first valve port, the valve core is provided with a second valve port, the first valve plug abuts against the connecting seat, the first valve plug abuts against the valve body, the first valve plug comprises a plugging portion, a sealing portion and a deformation portion, the plugging portion can be close to or far away from the first valve port, the sealing portion is in sealing connection with the valve core, when the plugging portion is relatively far away from the first valve port, the deformation portion deforms, the movable iron core assembly comprises a second valve plug, and the second valve plug can be close to or far away from the second valve port.

Description

Electromagnetic valve

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of electromagnetic control, in particular to an electromagnetic valve.

[ background of the invention ]

The electromagnetic valve structure shown in fig. 1 includes a valve body, a core 6, a core sleeve 10, a sealing ring 5, a diaphragm 12, a limiting member 11, a spring 9 and other components, the valve body is provided with a valve port, when a coil is powered on, a movable iron core 8 moves upwards to be close to a stationary iron core, the valve port is opened, under the action of pressure difference, the core sleeve 10, the sealing ring 5, the diaphragm 12 and the limiting member 11 move upwards together, the spring 9 is compressed, the sealing ring 5 also moves together with the core 6 in the opening and closing process of the electromagnetic valve of the structure, and in order to ensure the sealing performance of the part where the sealing ring 5 is located, the sealing ring 5 needs to have a certain amount of compression, so that relatively large resistance needs to be overcome in the opening process of the electromagnetic valve.

[ summary of the invention ]

The invention aims to provide a solenoid valve with a novel structure, which can ensure the sealing reliability and relatively reduce the resistance of the solenoid valve when the solenoid valve is opened.

An electromagnetic valve comprises a valve body, a valve core, a first valve plug, a connecting seat and a movable iron core assembly, wherein the connecting seat is fixedly connected with the valve body, the valve core is fixedly connected with the connecting seat or in limited connection, or the valve core is fixedly connected with the valve body or in limited connection, the valve body is provided with a first valve port, the valve core is provided with a second valve port, the first valve plug abuts against the connecting seat and abuts against the valve body, the first valve plug comprises a plugging portion, a sealing portion and a deformation portion, the plugging portion can be close to or far away from the first valve port, the sealing portion is in sealed connection with the valve core, when the plugging portion is relatively far away from the first valve port, the deformation portion deforms, the movable iron core assembly comprises a second valve plug, and the second valve plug can be close to or far away from the second valve port.

According to the invention, through the optimized design of the electromagnetic valve structure, the first valve plug comprises the plugging part, the sealing part and the deformation part, the plugging part can be close to or far away from the first valve port, the sealing part is in sealing connection with the valve core, and the deformation part deforms when the plugging part is relatively far away from the first valve port, so that the sealing reliability is ensured, and the resistance of the electromagnetic valve when the valve is opened can be relatively reduced.

[ description of the drawings ]

FIG. 1 is a sectional view of an overall structure of a solenoid valve according to the background art;

FIG. 2 is an enlarged schematic view of the solenoid valve core of FIG. 1;

FIG. 3 is a schematic view of a valve body, a coil and a magnetic conductive member of the solenoid valve according to the present invention;

FIG. 4 is a sectional view of the valve body structure of the solenoid valve provided by the present invention;

FIG. 5 is an exploded view of the solenoid valve provided by the present invention;

FIG. 6 is a first embodiment of a solenoid valve provided in accordance with the present invention;

FIG. 7 is an enlarged view of the valve core and first valve plug mating portion of the solenoid valve of FIG. 6;

FIG. 8 is a schematic diagram of a first valve plug of the solenoid valve of FIG. 6;

FIG. 9 is an enlarged schematic view of the valve cartridge structure of the solenoid valve of FIG. 6;

FIG. 10 is a schematic cross-sectional view of an alternative valve plug configuration for the solenoid valve of the present invention;

FIG. 11 is a second embodiment of a solenoid valve provided in accordance with the present invention;

FIG. 12 is a schematic view of a valve core structure of the solenoid valve of FIG. 11

[ detailed description ] embodiments

The technical solution provided by the present invention is described in detail below with reference to the drawings of the specification, and it should be noted that the present invention focuses on the structure of the protection valve element and the first valve plug and the matching relationship between the protection valve element and each component, and other structural changes can be fully adapted to other structures of the solenoid valve, such as the structure of the stationary core, the movable core assembly, the coil assembly, and the like.

The invention provides an electromagnetic valve, comprising a valve body 10, a valve core 20, a first valve plug 30, a connecting seat 50 and a movable iron core assembly 400, wherein the connecting seat 50 is fixedly connected with the valve body 10, the valve core 20 is fixedly connected or in a limiting way with the connecting seat 50, or the valve core 20 is fixedly connected or in a limiting way with the valve body 10, the valve body 10 is provided with a first valve port 101, the valve core 20 is provided with a second valve port 201, the first valve plug 30 is abutted against the connecting seat 50 and the first valve plug 30 is abutted against the valve body 10, the first valve plug 30 comprises a blocking part 301, a sealing part 302 and a deformation part 304, the blocking part 30 can be close to or far away from the first valve port 101, the sealing part 302 is in sealing connection with the valve core 20, the deformation part 304 is close to the blocking part 301 and the deformation part 304 is close to the sealing part 302, the deformation part 304 is positioned between the sealing part 302 and the blocking part 301, the sealing part 302 is relatively positioned above the deformation part 304 in the axial direction, and the sealing part 302 is relatively far away from the blocking part 30, when the blocking part is far away from the first valve port 101, the deformation part 304 can deform, the plunger assembly 400 comprises a plunger body 401, a second valve plug 403 and a first elastic element 200, the plunger body 401 is in limit connection with the second valve plug 403, and the second valve plug 403 can be close to or far away from the second valve port 201. According to the invention, through the optimized design of the structure of the electromagnetic valve, when the electromagnetic valve is in a normal power-off state, the second valve plug 403 is pressed against the second valve port 201 under the action of the first elastic piece 200, and the blocking part 301 of the first valve plug 30 is pressed against the first valve port 101; when the coil component of the electromagnetic valve is powered on, the movable iron core component 400 moves towards the direction of the stationary iron core 70 under the action of electromagnetic force, the second valve plug 403 is far away from the second valve port 201 by overcoming the spring force of the first elastic component 200, the medium above the first valve plug 30 is decompressed, the pressure below the first valve plug 30 is relatively large, and the first valve plug is pushed away upwards under the action of differential pressure, so that the first valve plug 30 is far away from the first valve port 101, the deformation part 304 is deformed and contracted, the sealing part 302 and the sealing part where the valve plug 20 is located are relatively kept motionless to form a static sealing state, the sealing reliability is better, and compared with the sealing structure of the electromagnetic valve in the background art, the sealing magnitude friction of interference of sealing is greatly reduced at the position where the valve plug and the first valve plug are matched, only the resistance of the deformation part exists when the first valve port is opened, and the development resistance of the electromagnetic valve is greatly reduced.

Fig. 3 to 10 are configured to describe in detail the first embodiment of the present invention, as shown in fig. 3, the solenoid valve includes a valve body 10, a coil component 2, and a magnetizer 3, and after the coil component 2 and the magnetizer 3 are assembled, the solenoid valve may be connected to the valve body 10, as shown in fig. 4, the solenoid valve includes a valve body 1, the valve body 1 has a first valve port 101, an inlet 102, an outlet 103, a port and a pipe claw near the inlet 102 for connecting an external connection pipe, the valve body 1 further includes an installation groove 104 and a groove wall 105, the installation groove 104 is located above the first valve port 101 for being engaged with the first valve plug 30, and the groove wall 105 extends upward.

As shown in fig. 5-6, the electromagnetic valve structure further includes a valve core 20, a first valve plug 30, a connecting seat 50, and other components, the valve core 20 is substantially in an inverted-convex structure and can be formed by machining metal such as stainless steel, the connecting seat 50 is fixedly connected with the valve body 1, the electromagnetic valve can 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, and the first valve plug 30 can be locked with the valve body 10 by a screw 170 to prevent medium leakage, in this application, the connecting seat 50 can be fixedly connected with the valve body 1 by a screw, of course, the connecting seat 50 can be fixedly connected with the valve body 1 by press-fitting the connecting seat 50 into the valve body 1, the connecting seat 50 has a foot portion 501 and a protrusion portion 502, the foot portion 501 extends from the connecting seat 50 and abuts against the first valve plug 30, the first valve plug 30 is substantially in a regular-convex structure, the first valve plug 30 includes a blocking portion 301, a sealing portion 302, a deforming portion 304, a second deforming portion 305 and an extending portion 306, the extending portion 306 extends radially outward from the second deforming portion 305, the extending portion 306 is adapted to the mounting groove 104, the extending portion 306 abuts against the foot portion 501, the first valve plug 30 is substantially limited on the valve body 1 through the connecting seat 50, the deforming portion 304 and the second deforming portion 305 at least include a thin-wall structure, when the solenoid valve is energized, the deforming portion 304 and the second deforming portion 305 can deform under the action of a differential force when the first valve plug 30 is relatively far away from the first valve port 101, the second deforming portion 305 is substantially in a thin-wall arched door-shaped structure and has an arched groove 3051, the risk of displacement of the extending portion 306 towards the blocking portion 301 can be reduced through the abutment of the arched groove 1 and the groove wall 105, and the extending portion 306 is further prevented from being separated from the mounting groove 104 to ensure the operational reliability of the first valve plug 30, the blocking portion 301 has a substantially flat plate-like structure and can approach or separate from the first valve port 101. The valve core 20 is fixedly connected or in limited connection with the connecting seat 50, the valve core 20 comprises a flange part 202, and the flange part 202 can be in press fit with the connecting seat 50 in an interference manner; or the connection seat 50 may be provided with a clamping groove or a clamping protrusion, and the outer wall of the flange portion 202 of the valve core 20 is correspondingly provided with the clamping protrusion or the clamping groove to realize the limit connection with the connection seat 50; the electromagnetic valve further comprises a mounting plate 500 and a sealing element 60, the mounting plate 500, the sealing element 60, the connecting seat 50, the valve core 20, the first valve plug 30 and the valve body 10 can be tightly pressed to prevent leakage of a medium after being locked by a screw 170, the valve core 20 is integrally limited in the connecting seat 50 in a mode that the upper end of a flange part 202 abuts against the lower end of the sealing element 60 and abuts against a protrusion part 502, the valve core 20 is provided with a first balance hole 206, the first valve plug 30 is provided with a second balance hole 303, the medium enters the upper part of the first valve plug 30 through the second balance hole 303 after entering from an inlet 102 of the valve body 1 and then enters the upper part of the valve core 20 through the first balance hole 206, the mounting plate 500 abuts against the connecting seat 50 to form a seam part, and the sealing element 60 abuts against the mounting plate 500, the connecting seat 50 and the valve plug 20 to cover the seam part respectively, to prevent leakage of the medium from the joint, the pressure above the spool 20 is substantially balanced with the pressure below the spool 20 when the solenoid valve is in the closed state.

The valve body 20 has a through hole 205 and a second valve port 201, and further includes a valve port portion 208, an engagement groove 203, and a guide portion 204, the second valve port 201 communicates with the through hole 205, the valve port portion 208 refers to a region where the second valve port 201 is located, the engagement groove 203 is located between the valve port portion 208 and the guide portion 204, the engagement groove 203 is relatively close to the second valve port 201, the guide portion 204 is relatively far from the second valve port 201, the guide portion 204 is located at a position below the engagement groove 203, the plunger assembly 400 includes a second valve plug 403, and in a normal state, that is, when the coil member is not energized, the second valve plug 403 abuts against the second valve port 201, when the coil component is energized, the plunger assembly 400 moves upward by the electromagnetic force, the second valve plug 403 is relatively far away from the second valve port 201, the medium is discharged from the through hole 205, the pressure above the valve core 20 is reduced, pushing the first valve plug 30 open under the action of the pressure difference causes the first valve plug 30 to move upward to open the first valve port 101. The first valve plug 30 is connected with the valve core 20 in a limiting way, the whole first valve plug 30 is approximately positioned above the first valve port 101 and can be close to or far away from the first valve port 101, the sealing part 302 abuts against the matching groove 203 to form static sealing between the first valve plug 30 and the valve core 20, the guiding part 204 guides the sealing part 302 to enable the sealing part 302 to be more easily embedded into the valve core 20, the deforming part 304 is positioned between the sealing part 302 and the blocking part 301, the deforming part 304 is approximately in a thin-wall conical structure and is relatively close to the blocking part 301, the sealing part 302 is relatively far away from the blocking part 301, a large gap is formed between the deforming part 304 and the guiding part 204, the deforming part 304 can be deformed in a stretching way, when the blocking part 301 closes the first valve port 101 under the normal power failure condition, the deforming part 304 is approximately in a stretching state and only has an initial deforming state without obvious deformation, when the coil component is powered on, the blocking part 301 is relatively far away from the first valve port 101 and lifts upwards under the action of pressure difference, the deformation part 304 deforms and contracts, the valve core 20 is fixedly connected with the connecting seat 50, the sealing part 302 is in sealing connection with the matching groove 203, and the sealing part 302 and the sealing part where the matching groove 203 is located form a static sealing state, so compared with a sealing structure of an electromagnetic valve structure in the background art, in order to ensure reliable sealing of the first valve plug 30 and the valve core 20, the requirement on the compression amount of the sealing part 302 is greatly reduced, the sealing part 302 and the valve core 20 always form the static sealing state and do not move along with the vertical direction in the valve opening process of the electromagnetic valve, the sealing reliability is increased, the valve opening resistance in the valve opening process can be greatly reduced, the resistance effect of the deformation part 304 when the first valve port 101 is opened can be almost ignored, the requirement on the electromagnetic driving force is greatly reduced, the miniaturization design of a coil part can be realized, and smooth valve opening can be realized by small driving force, and the valve opening process of the electromagnetic valve can be relatively ensured to be smooth and reliable.

The electromagnetic valve may further include a second elastic member 300, the second elastic member is sleeved on the outer periphery of the deformation portion 304 and the sealing portion 302, the lower end of the second elastic member 300 abuts against the blocking portion 301, the upper end of the second elastic member 300 abuts against the valve port 208, the second elastic member 300 is additionally arranged to assist the extension of the deformation portion 304, the deformation portion 304 may deform to a certain extent after repeated fatigue actuation, the extension of the deformation portion 304 can be assisted to ensure that the first valve plug 30 can smoothly abut against the first valve port 101 when the first valve port 101 is closed after the second elastic member 300 is additionally arranged, in the embodiment provided by the present application, the first valve plug 30 further includes a second deformation portion 305, the second deformation portion 305 is substantially in a thin-wall arched door-like structure and can also perform a stretching deformation function, the second deformation portion 305 is located on one side of the blocking portion 301, the deformation portion 304 is located on the other side of the blocking portion 301 relative to the second deformation portion 305, under the normal power-off state, the second deformation part 305 extends only to deform in the initial state and does not deform significantly, when the coil component of the solenoid valve is energized, the blocking part 301 is relatively far away from the first valve port 101 and rises upwards under the action of the pressure difference, and under the combined deformation action of the second deformation part 305 and the deformation part 304, the blocking part 301 can wholly rise upwards in a substantially horizontal state, so that the blocking part 301 can more reliably and stably move upwards to open the first valve port 101.

It should be noted that, in the electromagnetic valve provided in the present application, the first valve plug 30 may be provided with only the deformation portion 304 without the second deformation portion, and the blocking portion 301 may be provided with a thin-walled structure having a substantially flat plate shape, and the extension portion 306 may be limited by the connecting seat 50 and the valve body 1, and in the case where only the deformation portion 304 is provided, in the energized state, the blocking portion 301 is lifted upward relatively away from the first valve port 101 under the action of the pressure difference, but the blocking portion 301 is not lifted upward in an overall horizontal shape, but is lifted in a tapered shape, but the same technical effects as described above can be achieved.

Referring to fig. 10, another structure of the first valve plug 30' will be described, in which the first valve plug 30' includes a blocking portion 301', the blocking portion 301' has a thin-walled structure with an inverted trapezoid shape, the blocking portion 301' includes a second deforming portion 307 and a plate portion 308, the plate portion 308 has a horizontal structure, the second deforming portion 307 is inclined with respect to the plate portion 308, the second deforming portion 307 extends from the extending portion to the plate portion 308, the second deforming portion 307 is located between the extending portion 306' and the plate portion 308, one end of the second deforming portion 307 is connected to the extending portion 306', the other end is connected to the plate portion 308, the second deforming portion 307 is capable of performing telescopic deformation, 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 abutting against the first valve port 101 and rises upward in the overall horizontal axial direction, the second deforming portion 307 tends to deform in the same horizontal direction as the plate portion 308, under the combined deformation action of the second deformation portion 307 and the deformation portion 304, the whole blocking portion 301 can be lifted upwards in a substantially horizontal state, and can move upwards to open the first valve port 101 more reliably and smoothly.

The electromagnetic valve further comprises a movable iron core assembly 400, the movable iron core assembly 400 comprises a movable core body 401, a connecting part 402, a second valve plug 403 and a first elastic part 200, the movable core body 401 can be close to or far away from the stationary iron core 70, the connecting part 402 is fixedly connected with the movable core body 401 or in a limiting connection or an insert molding structure, or the connecting part 402 and the movable core body 401 can also be in an integral processing and molding structure, when the connecting part 402 and the movable core body 401 are arranged in a split mode, part processing materials can be saved, and assembly is convenient, the connecting part 402 can be a non-metal part such as a plastic part, so that component products can be well reduced, the second valve plug 403 can be made of rubber materials or plastic materials, the connecting part 402 can limit the second valve plug 403 on the movable iron core assembly in a compression deformation mode, the first elastic part 200 is sleeved on the outer periphery of the connecting part 402, and one end of the first elastic part is abutted to a protrusion of the connecting part 402, the other end of the electromagnetic valve is abutted against the mounting plate 500, and when the electromagnetic valve is in a power-off state, the second valve plug 403 is always abutted against the second valve port 201; and when the solenoid valve on state, the movable iron core assembly 400 can overcome the spring force action of the first elastic member 200, the whole upward movement of the movable iron core assembly 400 is close to the stationary iron core 70, the second valve plug 403 is relatively far away from the second valve opening 201, the solenoid valve further comprises a sealing gasket 100, the sealing gasket 100 is sleeved in the groove of the connecting part 402, and the sealing gasket 100 is arranged to prevent the connecting part 402 from generating noise when the connecting part 402 moves upward and contacts with the mounting plate 500, so that the noise is prevented from being generated due to the direct contact between the connecting part 402 and the mounting plate 500. The solenoid valve has a spool housing portion 207, the spool housing portion 207 being substantially defined by the mounting plate 500 and the spool 20, and the connecting portion 402, the first elastic member 200, the second valve plug 403, and the packing 100 being substantially located in the spool housing portion 207.

The solenoid valve further comprises a static iron core 70, a shell 80 with magnetic conductivity, and a coil component 90, wherein the static iron core is fixedly connected with the shell 80, the shell 80 substantially covers the coil component 90, the static iron core 70 is fixedly connected with a sleeve, and the moving core body 401 can perform axial lifting motion along the wall of the sleeve in the sleeve.

Another embodiment of the solenoid valve provided by the present invention is described below with reference to fig. 11 to 12, 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' extends from the valve body accommodating cavity a toward the movable core assembly 400, a portion 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 interference fit with the accommodating wall a1 to form a fixed connection between the valve core 20' and the valve body 10, or the valve core seat 26 'can be in transition fit with the valve body 10, or the valve core seat 26' can be in small clearance fit with the valve body 10, the valve core 20 'of the present application further includes a body 23', the body 23 'is located above the valve core seat 26', and the outer diameter of the valve core seat 26 'can be set to be larger than the outer diameter of the body 23', the valve core 20 'further includes a small diameter portion 21' and a large diameter portion 22', the small diameter portion 21' and the large diameter portion 22 'are far away from the valve core seat 26' relative to the body 23', 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 relative to 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', the transition portion 222' may be a step structure or other structure for abutting against the sealing portion 302 of the first valve plug 30, the valve core 20 'has a second valve port 211', the second valve port 211 'is formed on the small diameter portion 21', the small diameter portion 21 'provides a guiding effect for the sealing portion 302, and unlike the valve core structure of the first embodiment and the flip-chip assembly manner of the first valve plug 30, the first valve plug 30 can be assembled with the valve core 20' in a positive assembly manner, the valve core 20 'further has a connection port 24' and a through hole 25', the connection port 24' communicates with the outlet passage of the outlet 103 and the through hole 25', and the connection port 24' is opened to the body 23', which facilitates the assembly of the first valve plug 30 with the valve core 20'.

The connecting seat 50' is substantially in a shape of Chinese character ' ao ', the connecting seat 50' is fixedly connected with the valve body 10, the connecting seat 50' has a matching hole portion 502', the matching hole portion 502' can be in small clearance fit with the small diameter portion 21' of the valve core 20', or the matching hole portion 502' and the small diameter portion 21' are in press fit interference fit, or the matching hole portion 502' and the small diameter portion 21' are in transition fit, when the matching hole portion and the small diameter portion adopt the interference fit or transition fit mode, the first valve plug can be firstly installed in the small diameter portion and then the valve core and the connecting seat are assembled, it needs to be described that the matching mode of the valve core seat 26' below the valve core 20' and the valve body and the matching mode of the small diameter portion 21' above the valve core 20' and the connecting seat 50' can adopt a multi-combination mode, and only needs to ensure that the valve core 20' can be relatively stably positioned on the valve body 10. The solenoid valve is integrally connected with the valve body 10, and further comprises a first accommodating part 503 'and a second accommodating part 504', wherein the first accommodating part 503 'and the second accommodating part 504' are both substantially limited by the connecting seat 50 'and the mounting plate 500, the sealing member 60 is positioned in the first accommodating part 503' and respectively abutted against the mounting plate 500 and the connecting seat 50', the sealing member 60 substantially covers the joint part of the mounting plate 500 and the connecting seat 50' to prevent the medium from leaking out from the joint part, the partial movable iron core assembly 400 is positioned in the second accommodating part 504', the connecting seat 50' further comprises a first leg part 505 'and a second leg part 506' which extend towards the first valve port 101, the first leg part 505 'and the second leg part 506' are substantially arranged in parallel, the first leg part 505 'can be in interference press fit with the valve body 10 to enable the first valve plug 30 to be integrally connected with the valve body 10 in a limiting way, the solenoid valve further comprises a receiving groove 501', the second leg part 506 'substantially forms the receiving groove 501', the receiving groove 501' has a groove bottom wall, a part of the second elastic member 300 is located in the receiving groove 501', the second leg 506' is located opposite to the position of the second elastic member 300 to prevent the second elastic member 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 is in large clearance fit with the large diameter portion 22', and the fitting structure of the first valve plug 30 and the valve core and the related technical effects are already described in detail in the first embodiment and are not repeated.

It should be noted that the ordinal numbers of "first" and "second" and the directional terms of "upper" and "lower" and the adjectives of "large" and "small" are set forth in the description of the drawings, and are not intended to limit the structure, shape or sequence of the components.

The present invention has been described in terms of specific embodiments, which are merely illustrative of the principles and concepts that can be employed to facilitate an understanding of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A solenoid valve is characterized by comprising a valve body, a valve core, a first valve plug, a connecting seat and a movable iron core assembly, wherein the connecting seat is fixedly connected with the valve body, the valve core is fixedly connected or in limited connection with the connecting seat, or the valve core is fixedly connected or in limited connection with the valve body;

the valve body is provided with a first valve port, the valve core is provided with a second valve port, the first valve plug abuts against the connecting seat, the first valve plug abuts against the valve body, the first valve plug comprises a plugging portion, a sealing portion and a deformation portion, the plugging portion can be close to or far away from the first valve port, the sealing portion is in sealing connection with the valve core, when the plugging portion is relatively far away from the first valve port, the deformation portion deforms, the movable iron core assembly comprises a second valve plug, and the second valve plug can be close to or far away from the second valve port.

2. The solenoid valve of claim 1, wherein the first valve plug further comprises a second deformable portion and an extended portion, the second deformable portion being located between the extended portion and the blocking portion, the second deformable portion comprising at least a thin-walled structure, the second deformable portion being deformed when the blocking portion is relatively far from the first valve port.

3. A solenoid valve according to claim 2, wherein the valve body has 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 has a substantially thin-walled arched structure, and the arched groove abuts against the groove wall.

4. The electromagnetic valve according to claim 2, wherein the second deforming portion has a substantially thin plate-like structure, and the second deforming portion extends obliquely from the extending portion toward the closing portion.

5. The electromagnetic valve according to claim 1, wherein the valve element has a substantially inverted-convex structure, a through hole, and further includes a flange portion fixedly or limitedly connected to the connecting seat, the valve element further includes a valve port portion, an engagement groove, and a guide portion, the second valve port communicates with the through hole, the engagement groove is located between the valve port portion and the guide portion, and the seal portion abuts against the engagement groove via the guide portion.

6. The electromagnetic valve according to claim 1, wherein the valve core includes a valve core seat, the valve core seat is in interference fit with the valve body, or the valve core seat is in transition fit with the valve body, or the valve core seat is in clearance fit with the valve body, the valve core further 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, the large diameter portion is located between the small diameter portion and the body, the small diameter portion includes the second valve port, 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. The electromagnetic valve according to claim 6, wherein the valve core further includes a connection port and a through hole, the body has the connection port, the second valve port, the connection port and the through hole communicate with each other, the connection seat has a substantially concave structure, the connection seat has a fitting hole portion, and the small diameter portion is in clearance fit with the fitting hole portion, or is in interference fit with the fitting hole portion, or is in transition fit with the fitting hole portion.

8. The solenoid valve according to claim 6 or 7, wherein the connecting seat includes a first leg and a second leg, the first leg and the second leg extend toward the first valve port, the solenoid valve further includes a second elastic member, the second elastic member is located at the outer peripheral portion of the sealing portion and the deforming portion, the solenoid valve has a receiving groove, the second leg substantially forms the receiving groove, the receiving groove has a groove bottom wall, a portion of the second elastic member is located in the receiving groove, one end of the second elastic member abuts against the groove bottom wall, and the other end abuts against the blocking portion.

9. The electromagnetic valve according to any one of claims 1 to 7, further comprising a screw, a mounting plate, and a sealing member, wherein the mounting plate, the sealing member, the connecting seat, the valve core, the first valve plug, and the valve body are locked by the screw, the mounting plate abuts against the connecting seat to form a joint portion, the sealing member abuts against the mounting plate, the sealing member abuts against the connecting seat, and the sealing member covers the joint portion.

10. The electromagnetic valve according to any one of claims 1 to 7, wherein the plunger assembly further comprises a plunger body, a connecting portion, and a first elastic member, the plunger body is fixedly connected or integrated with the connecting portion, the connecting portion is connected to the second valve plug in a limiting manner, and the first elastic member is located at an outer peripheral portion of the connecting portion.

11. The solenoid valve of claim 10 further comprising a gasket positioned in a groove of the connecting portion.