CN217713684U - Electromagnetic valve - Google Patents

Abstract

A solenoid valve comprises a valve body, a valve seat and a valve assembly, wherein the valve body is fixedly connected with the valve seat, the valve assembly is in limit connection with the valve seat, the valve body is provided with an inlet cavity and an outlet cavity, the valve seat is provided with a first guide part, the solenoid valve is also provided with a first cavity, a first valve port and a second valve port, the first guide part and at least part of the wall of the valve assembly form the first cavity, the valve assembly comprises a piston assembly and a one-way component, the one-way component is arranged in the piston assembly and can control the second valve port to be opened and closed, the piston assembly is provided with a first channel and a second channel, the first valve port is communicated with the second channel, and the second valve port is communicated with the first channel; when the pressure of the outlet cavity is greater than that of the inlet cavity, the second valve port is opened, the first cavity is communicated with the second channel through the second valve port, and the pressure difference between the inlet cavity and the outlet cavity of the electromagnetic valve is balanced by arranging the one-way component in the piston assembly, so that the valve assembly is not easy to be jacked open, and the valve closing capacity of the electromagnetic valve is improved.

Description

Electromagnetic valve

Technical Field

The utility model relates to a fluid control technical field, in particular to solenoid valve.

Background

The electromagnetic valve has a switching function, when the electromagnetic valve is closed, the situation that the electromagnetic valve is opened may occur, and the improvement of the valve closing capability of the electromagnetic valve is a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solenoid valve to be favorable to improving the valve closing capability of solenoid valve.

In order to achieve the above object, an embodiment of the present application provides a solenoid valve, including an iron core assembly, a valve seat and a valve assembly, the valve seat with iron core assembly fixed connection or spacing connection, its characterized in that: the solenoid valve is provided with a valve cavity and a first valve port, the wall forming the valve cavity comprises the inner wall of the valve seat, the valve assembly is positioned in the valve cavity, the valve cavity comprises a first cavity, and at least part of the first cavity and the first valve port are positioned on two sides of the valve assembly along the axial direction of the valve assembly, the first cavity is closer to the iron core assembly than the first valve port, the valve assembly comprises a piston assembly and a one-way component, the one-way component is fixedly connected or in limited connection with the piston assembly, the piston assembly can open or close the first valve port, the piston assembly is provided with a first passage, and at least part of the one-way component is positioned in the first passage; the solenoid valve is provided with an outlet cavity, and when the piston assembly closes the first valve port, the one-way component can enable the outlet cavity to conduct the first cavity in a one-way mode.

One embodiment of the present application provides a solenoid valve, including a one-way component, the one-way component is at least partially located in the first channel of the piston assembly, when the piston assembly closes the first valve port, the one-way component enables the outlet chamber to conduct the first chamber in one way, so that the pressures on both sides of the valve assembly are balanced, and thus the valve assembly is not easily opened, which is beneficial to improving the valve closing capability of the solenoid valve.

Drawings

Fig. 1 is a schematic perspective view of a solenoid valve according to an embodiment of the present invention;

FIG. 2 is a front view of the valve seat of FIG. 1;

FIG. 3 isbase:Sub>A sectional view of the solenoid valve of FIG. 2, taken along line A-A;

FIG. 4 is a rear view of the solenoid valve of FIG. 1;

FIG. 5 is a cross-sectional view of the solenoid valve shown in FIG. 4 with section line B-B;

FIG. 6 is a cross-sectional structural view of the valve seat of FIG. 5;

FIG. 7 is a cross-sectional structural view of the piston assembly of FIG. 5;

FIG. 8 is a schematic perspective view of the valve assembly of FIG. 5;

FIG. 9 is a front view of the valve assembly of FIG. 8;

FIG. 10 is a cross-sectional structural view of the valve assembly of FIG. 9 taken along line C-C;

FIG. 11 is a schematic cross-sectional view of the second valve port of FIG. 9 with the second valve port open;

FIG. 12 is a schematic cross-sectional view of a valve assembly in another embodiment having a first open portion;

FIG. 13 is a schematic cross-sectional view of a valve assembly in another embodiment having a second open portion;

FIG. 14 is a schematic cross-sectional view of a valve assembly in another embodiment having a valve port;

FIG. 15 is a schematic cross-sectional view of a valve assembly in another embodiment having a valve mouthpiece;

FIG. 16 is a cross-sectional view of another embodiment of a valve assembly with a ball-shaped sub-cartridge.

Detailed Description

The present application is further described below in conjunction with the following figures and specific examples (the following examples are only some examples, not all combinations are included):

in the following description of the embodiment, for the sake of easy understanding, terms indicating directions (for example, "upper", "lower", "upper end face", and the like) are appropriately used, and the term is not intended to limit the present invention, and it is a matter of course that in a normally closed type solenoid valve, when the solenoid valve is opened by energization, the moving direction of the movable iron core is "upper", and when the solenoid valve is closed by deenergization, the moving direction of the movable iron core is "lower", and in a normally open type solenoid valve, the moving direction of the movable iron core when the solenoid valve is opened by energization. The "axial direction" herein refers to a moving direction or an up-down direction of the plunger 31, and the "radial direction" is a direction perpendicular to the axial direction.

Referring to fig. 1 to 7, a solenoid valve 100 according to an embodiment of the present invention includes: coil pack 1, iron core subassembly 2, disk seat 3, valve module 4, valve body 5 and valve support piece 6, coil pack 1 cover is located iron core subassembly 2, iron core subassembly 2 and 3 fixed connection of disk seat, fixed connection is including the welding, bonding or thread tightening, in this embodiment, fixed mode is the welding, valve support piece 6 is located coil pack 1 below, fixed connection or spacing connection between valve support piece 6 and the disk seat 3, in this embodiment, valve support piece 6 and 3 fixed connection of disk seat, valve module 4 is located 3 inner chambers of disk seat, valve module 4 and 3 clearance fits of disk seat.

The coil component 1 includes a magnetizer 11, an injection molding casing 12 and a coil 14, the magnetizer 11 and the injection molding casing 12 are fixed by clamping, at least a part of the coil 14 is located in the injection molding casing 12, in this embodiment, the coil 14 and the injection molding casing 12 are integrally injection molded, or can be molded respectively and then assembled and connected; the iron core assembly 2 comprises a static iron core 21, a movable iron core 22, a sleeve 23 and an elastic element 24; the static iron core 21 and the sleeve 23 are welded and fixed, in the embodiment, the static iron core 21 and the sleeve 23 are fixed by laser welding, the movable iron core 22 is located below the static iron core 21 and at least partially located in the sleeve 23, and the static iron core 21 and the movable iron core 22 are connected through an elastic element 24; iron core subassembly 2 has spacing portion and connecting portion, the first contact surface 214 of quiet iron core offsets with the first contact surface 111 of magnetizer, quiet iron core 21 passes through screw 25 fixed connection with magnetizer 11, sheathed tube first end 231 and the second concave part 212 welded fastening of quiet iron core, in this embodiment, sleeve pipe 23 and quiet iron core 21 pass through laser welding fixed, riveting fastening behind sheathed tube second end 232 and the 3 interference fit of disk seat, 3 inner walls of later disk seat and the outer wall welded fastening of sleeve pipe 23, in this embodiment, disk seat 3 and sleeve pipe 23 pass through the stove and weld fixedly. The movable iron core 22 is provided with a first groove 222 and a supporting surface 221, the supporting surface 221 is arranged at the bottom of the first groove 222, and the supporting surface 221 extends along the radial direction of the electromagnetic valve 100; the elastic element 24 is arranged in the first groove 222, a first end part 241 of the elastic element is abutted against the first wall 211 of the static iron core, a second end part 242 of the elastic element is abutted against the supporting surface 221 of the movable iron core, at least part of the movable iron core 22 is positioned in the sleeve 23, the movable iron core 22 is in clearance fit with the sleeve 23, and the movable iron core 22 is abutted against the second end part 242 of the elastic element along the axial direction for limiting. Along the axial of solenoid valve 100, the bottom joint of movable iron core 22 has sealing member 223, and sealing member 223 is kept off with valve module 4, and valve module 4 is located the sealing member 223 below.

Referring to fig. 3, 5, 6 and 7, the valve seat 3 has a first guide portion 31, the valve assembly 4 includes a piston assembly 41, when the piston assembly 41 operates, at least a portion of the piston assembly 41 is located in a cavity formed by the first guide portion 31, the piston assembly 41 has a first fitting portion 411, the first fitting portion 411 is in sliding contact with the first guide portion 31, so that the piston assembly 41 moves axially along the first guide portion 31, and the piston assembly 41 can open and close the first valve port 623; the valve seat 3 further has a connecting portion, a first connecting portion 33 of the valve seat is formed on the outer side wall of the valve seat 3, the first connecting portion 33 is fixedly connected or connected in a limiting manner with the valve support 6, in this embodiment, the first connecting portion 33 and the valve support 6 are in threaded connection, the valve seat 3 has a hole 35 along the axial direction of the solenoid valve 100, a second connecting portion 34 is formed in the hole 35, the second connecting portion 34 is fixedly connected with the sleeve 23, and in this embodiment, the second connecting portion 34 and the sleeve 23 are welded and fixed; the solenoid valve 100 has a valve chamber 65, the wall of the valve seat 3 forms at least part of the wall of the valve chamber 65, the piston assembly 41 is located in the valve chamber 65, the valve chamber 65 has a first chamber 32, and the walls of the first guide 31 and the piston assembly 41 form part of the wall of the first chamber 32.

Referring to fig. 3, 5 and 7, the piston assembly 41 has a first passage 416 and a first wall 418, the first wall 418 facing the core assembly 2, the first passage 416 is formed in the first wall 418, the first passage 416 has a first port 4165 in the first wall 418, the piston assembly 41 further has a second passage 417, the second passage 417 penetrates the piston assembly 41 in the axial direction of the solenoid valve 100, the second passage 417 has a second port 4171 in the first wall 418, the core assembly 2 can close the second port 4171, and the second passage 417 communicates with the first port 623; when the first valve port 623 is opened, the second passage 417 can be communicated with the first cavity 32 through the second port 4171, so that the first cavity 32 can be decompressed through the second port 4171, which is beneficial to improving the valve opening capability of the piston assembly 41; in the radial direction of the piston assembly 41, the first port 4165 is closer to the outer side wall of the piston assembly 41 than the second port 4171. The first passage 416 has a third port 4161 in the wall of the second passage 417, the third port 4161 is communicated with the second passage 417, the third port 4161 is located in the piston assembly 41, referring to fig. 10, the third port 4161 is located at the intersection of the first passage 416 and the second passage 417, and the third port 4161 can be communicated with the first passage 416 and the second passage 417, so that in the closed valve state, the second passage 417 can be vented through the first passage 416, so that the pressure at the first port 623 is reduced, so that the valve assembly 4 is not flushed open, which is favorable for improving the stability of the valve assembly 4 in the closed valve state; alternatively, referring to fig. 10 and 12, the third opening 4161 may be a third opening 4166 communicating the first passage 416 with the second passage 417, in this embodiment, the first passage 416 and the second passage 417 do not intersect, the first opening 4166 is formed in the first passage 416 or the second passage 417, the first opening 4166 communicates the first passage 416 with the second passage 417, and the first opening 4166 and the third opening 4161 also have an advantageous effect of relieving the pressure in the second passage 417; alternatively, the third opening 4161 may be the opening formed by the first passage 416 on the lower side wall of the piston assembly 41, the piston assembly 41 further has a second opening portion 4167, the second opening portion 4167 is formed on the bottom wall of the piston assembly 41, the second opening portion 4167 is communicated with the first valve port 623, and the second opening portion 4167 also branches the medium, so that the pressure of the second passage 417 is reduced, which is beneficial to reducing the impact of the medium of the second passage 417 on the core assembly 2.

Referring to fig. 5 and 7, in the present embodiment, the wall of the first passage 416 is formed by a large diameter section 4162, a small diameter section 4163 and a reduced diameter section 4164, the large diameter section 4162, the small diameter section 4163 and the reduced diameter section 4164 are sequentially arranged along the axial direction of the piston assembly 41, the reduced diameter section 4164 is more distant from the core assembly 2 than the large diameter section 4162 and the small diameter section 4163, the large diameter section 4162 is closer to the core assembly 2 than the reduced diameter section 4164 and the small diameter section 4163, the large diameter section 4162 communicates with the first cavity 32 of the solenoid valve 100, and the large diameter section 4162, the small diameter section 4163 and the reduced diameter section 4164 are formed in the first passage 416, so that the check member 40 can be disposed in the first passage 416, facilitating more compact arrangement of the check member 40 in the piston assembly 41; alternatively, in another embodiment, referring to fig. 7 and 14, the one-way component 40 further includes a valve port portion 401, the valve port portion 401 has a second valve port 415, the valve port portion 401 is located in the first channel 416, the valve port portion 401 and the mounting portion 43 are separately disposed, and the valve port portion 401 is fixedly connected or connected in a limiting manner with the piston assembly 41; alternatively, in another embodiment, referring to fig. 7 and 13, the valve port 401 and the mounting portion 43 are an integral structure, which is referred to as a valve port 401', the valve port 401' is fixedly connected or connected to the piston assembly 41 in a limiting manner, and the sub-valve core 42 is at least partially located in the valve port 401', so that the check member 40 can be separately processed, which is beneficial to improving the efficiency of assembling the solenoid valve 100.

Referring to fig. 5, 7 and 10, the valve assembly 4 includes a one-way component 40, the one-way component 40 is at least partially located in a piston assembly 41, the one-way component 40 includes a mounting portion 43, the piston assembly 41 includes a fitting portion 419, the fitting portion 419 is formed in a first passage 416 of the piston assembly, and the mounting portion 43 and the fitting portion 419 are fixedly connected or connected in a limiting manner, in the embodiment, the mounting portion 43 and the fitting portion 419 are in an interference fit; the check member 40 further includes a sub-spool 42, the sub-spool 42 is capable of acting relative to the mounting portion 43, the solenoid valve 100 has a second valve port 415, the sub-spool 42 is capable of opening and closing the second valve port 415, so as to control the communication between the first cavity 32 and the second channel 417, which is beneficial for realizing the opening and closing effect of the check member 40, the second valve port 415 is formed in a reduced section 4164, and the sub-spool 42 and the reduced section 4164 form the second valve port 415 to control the opening and closing of the second valve port; the second port 415 is located in the first passage 416, and the second port 415 is located between the first port 4165 and the third port 4161.

Referring to fig. 5, the valve supporter 6 includes a connection portion 61 and a communication portion 62. The connecting portion 61 is formed on the outer wall and the inner wall of the valve support 6, in this embodiment, the connecting portion 61 is a threaded structure, the connecting portion 61 can be formed with an external thread or an internal thread, the valve body 3 is connected with the outer wall of the valve support 6 through a thread, and the valve seat 3 is connected with the inner wall of the valve support 6 through a thread; the communicating part 62 has a third passage 621 and a fourth passage 622, wherein the third passage 621 radially penetrates through the side wall of the communicating part 62 along the electromagnetic valve 100, the third passage 621 communicates with the inner cavity of the valve body 3, the side wall of the communicating part 62 may be formed with a plurality of third passages 621, in this embodiment, the communicating part 62 has eight third passages 621, and the third passages 621 are uniformly distributed along the circumferential direction of the communicating part 62. A fourth passage 622 is formed in the bottom of the communication portion 62, the fourth passage 622 is formed with an opening at the bottom of the communication portion 62, and further, the fourth passage 622 is formed with an opening at the bottom wall of the communication portion 62; the solenoid valve 100 further has a first valve port 623, the first valve port 623 is formed in the upper wall of the bottom of the communicating portion 62, and the first valve port 623 is disposed on the valve support 6, so that the valve assembly 4 can be integrally disposed with the valve support 6, which is beneficial to realizing miniaturization of the solenoid valve 100; the fourth passage 622 is communicated with the first port 623, and when the first port 623 is opened, the third passage 621 can be communicated with the fourth passage 622 through the first port 623. The valve support 6 has a sealing portion 63, and a first sealing member 631 is provided axially above the connecting portion 61 of the valve support 6 and the valve seat 3 to ensure that the solenoid valve 100 does not leak. A second sealing element 632 is arranged above the axial direction of the joint of the valve supporting element 6 and the valve body 5 to prevent leakage; a third seal 633 is provided between the communication portion 62 of the valve support and the valve body 5, and the third seal 633 is located between the fourth passage 622 and the third passage 621, preventing internal leakage.

Referring to fig. 3 and 5, the valve body 5 has a first flow passage 51 and a second flow passage 52, and the first flow passage 51 communicates with an inner cavity of the valve support 6. The second flow passage 52 communicates with the fourth passage 622, the first flow passage 51 may serve as an inlet passage of the solenoid valve 100, and the second flow passage 52 may serve as an outlet passage of the solenoid valve 100.

Referring to fig. 5, 10 and 11, the check component 40 further includes a second elastic element 44, the sub-valve element 42 is at least partially sleeved on the second elastic element 44, in this embodiment, the mounting portion 43 is a pressing sheet, the mounting portion 43 may also be another structure having a limiting function, the mounting portion 43 is in interference fit with the large-diameter section 4162, the piston assembly 41 further has a second supporting surface 4138, the second supporting surface 4138 is located in the large-diameter section 4162, the second supporting surface 4138 faces upward along the axial direction of the electromagnetic valve 100, the mounting portion 43 abuts against the second supporting surface 4138, the second supporting surface 4138 axially limits the mounting portion 43, and the mounting portion 43 is in limiting connection with the sub-valve element 42, so that the sub-valve element 42 can move in the first passage 416, which is beneficial to improving the stability of the movement of the sub-valve element 42; the second elastic element 44 is sleeved on the sub-valve element 42, the second elastic element 44 has a first end 441 and a second end 442, the first end 441 is located axially below the second end 442, the sub-valve element 42 of the valve assembly has a first supporting surface 421, the first supporting surface 421 extends along the radial direction of the solenoid valve 100, the first end 441 of the second elastic element 44 abuts against the first supporting surface 421 of the sub-valve element for limiting, and the second end 442 of the second elastic element 44 abuts against the mounting portion 43 for limiting.

Referring to fig. 5 and 7, the piston assembly 41 further includes a piston ring 411, a first elastic element 412 and a fourth seal 414, the piston assembly 41 has a first concave portion 4131 and a first convex portion 4132, the first concave portion 4131 is formed on an outer side wall of the piston assembly 41, and the piston ring 411 is fitted in the first concave portion 4131; one end of the first elastic element 412 is clamped to the first protrusion 4132, the other end of the first elastic element 412 abuts against the third supporting surface 64 of the valve support, the third supporting surface 64 is located at the bottom of the valve chamber 65, and the third supporting surface 64 extends along the radial direction of the solenoid valve 100. The fourth seal 414 is fixedly or captively connected to the piston assembly 41. Referring to fig. 10 and 16, in another embodiment, the sub-valve element 42 may also be a ball or a sphere-like shape, the sub-valve element 42 is in clearance fit with the small-diameter section 4163, and in the open state of the second valve port 415, the sub-valve element 42 may be abutted against the mounting portion 43 for limiting, in this embodiment, the structure of the second elastic element 44 may be omitted, so that the number of parts of the unidirectional component 40 is reduced, which is beneficial to simplifying the structure of the unidirectional component 40.

Referring to fig. 3, 5 and 10, the solenoid valve 100 includes an outlet chamber 511 and an inlet chamber 521, when the pressure of the outlet chamber 511 is greater than that of the inlet chamber 521 in a state where the first valve port 623 is closed, when the pressure of the outlet chamber 511 is greater than that of the inlet chamber 521, the medium flows back from the outlet chamber 511 along the second passage to the first passage 416, the sub-valve spool 42 moves axially upward, the second valve port 415 is opened, and the one-way component 40 enables the first valve port 623 to conduct the first chamber 32 in a one-way manner, so that the pressure of the first chamber 32 is continuously increased until the pressure difference between the outlet chamber 521 and the first chamber 32 gradually approaches equilibrium, so that the valve assembly 4 is not easily opened, which is beneficial to improving the valve closing capability of the solenoid valve 100.

It should be noted that: although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can make modifications and substitutions on the present application, and all technical solutions and modifications which do not depart from the spirit and scope of the present application should be covered by the claims of the present application.

Claims (10)

1. The utility model provides a solenoid valve (100), includes iron core subassembly (2), disk seat (3) and valve module (4), disk seat (3) with iron core subassembly (2) fixed connection or spacing connection, its characterized in that: the solenoid valve (100) is provided with a valve cavity (65) and a first valve port (623), the wall forming the valve cavity (65) comprises the inner wall of the valve seat (3), the valve component (4) is positioned in the valve cavity (65), the valve cavity (65) comprises a first cavity (32), at least part of the first cavity (32) and the first valve port (623) are positioned on two sides of the valve component (4) along the axial direction of the valve component (4), the first cavity (32) is closer to the iron core component (2) than the first valve port (623), the valve component (4) comprises a piston component (41) and a one-way component (40), the one-way component (40) is fixedly connected or connected in a limited mode with the piston component (41), the piston component (41) can open or close the first valve port (623), the piston component (41) is provided with a first passage (416), and at least part of the one-way component (40) is positioned in the first passage (416);

the solenoid valve (100) is provided with an outlet cavity (521), and when the piston assembly (41) closes the first valve port (623), the one-way component (40) can enable the outlet cavity (521) to conduct the first cavity (32) in a one-way mode.

2. The solenoid valve according to claim 1, characterized in that said piston assembly (41) comprises a first wall (418), said first wall (418) facing said core assembly (2), said first passage (416) having a first port (4165) at said first wall (418), said piston assembly (41) having a second passage (417), said second passage (417) extending through said piston assembly (41) along the axial direction of said piston assembly (41), said second passage (417) having a second port (4171) at said first wall (418), said core assembly (2) being able to close said second port (4171), said second passage (417) communicating with said first valve port (623), said first port (4165) being closer to the outer side wall of said piston assembly (41) than said second port (4171) along the radial direction of said piston assembly (41).

3. The solenoid valve according to claim 2, characterized in that the first passage (416) has a third port (4161) at the lower side wall of the piston assembly (41), the third port (4161) communicating with the first valve port (623);

alternatively, the first passage (416) has a third port (4161) in a wall forming the second passage (417), the third port (4161) communicating with the second passage (417), the third port (4161) being located within the piston assembly (41).

4. The solenoid valve according to claim 3, characterized in that the check member (40) comprises a mounting portion (43), the piston assembly (41) comprises a fitting portion (419), the mounting portion (43) is fixedly connected or in limit connection with the fitting portion (419), the check member (40) comprises a sub-spool (42), and the sub-spool (42) can move relative to the mounting portion (43);

the solenoid valve (100) has a second port (415), the sub-spool (42) being capable of opening and closing the second port (415), the second port (415) being located between the first port (4165) and the third port (4161).

5. The solenoid valve as claimed in claim 4, characterized in that the wall forming the first passage (416) comprises a large diameter section (4162), a small diameter section (4163) and a reduced diameter section (4164), the cooperating portion (419) being located in the large diameter section (4162), the second valve port (415) being formed in the reduced diameter section (4164), the first port (4165) being close to the large diameter section (4162), the third port (4161) being close to the small diameter section (4163).

6. The solenoid valve according to claim 4, wherein the check member (40) comprises a valve port portion (45), the valve port portion (45) has a second valve port (415), the valve port portion (45) is located in the first passage (416), the valve port portion (45) is separately provided from the mounting portion (43), and the valve port portion (45) is fixedly connected or in a limited connection with the piston assembly (41); or the valve opening part (45) and the mounting part (43) are of an integral structure.

7. The solenoid valve according to claim 5, characterized in that the solenoid valve (100) further comprises a valve support (6), the valve support (6) being fixedly connected with the valve seat (3); the valve component (4) further comprises a first elastic element (412), one end part of the first elastic element (412) is clamped with the piston component (41), and the other end part of the first elastic element (412) is abutted with the valve support member (6); the valve support (6) is provided with a communication part (62), the communication part (62) is provided with a third channel (621) and a fourth channel (622), the third channel (621) penetrates through the communication part (62) along the radial direction of the electromagnetic valve (100), the third channel (621) is communicated with the valve cavity (65), the fourth channel (622) is formed at the bottom of the communication part (62), an opening is formed in the lower wall of the bottom of the communication part (62) of the fourth channel (622), and the first valve port (623) is formed in the upper wall of the bottom of the communication part (62).

8. The solenoid valve according to claim 6, characterized in that the solenoid valve (100) further comprises a valve support (6), the valve support (6) being fixedly connected with the valve seat (3); the valve component (4) further comprises a first elastic element (412), one end part of the first elastic element (412) is clamped with the piston component (41), and the other end part of the first elastic element (412) is abutted with the valve support member (6); the valve support (6) is provided with a communication part (62), the communication part (62) is provided with a third channel (621) and a fourth channel (622), the third channel (621) penetrates through the communication part (62) along the radial direction of the electromagnetic valve (100), the third channel (621) is communicated with the valve cavity (65), the fourth channel (622) is formed at the bottom of the communication part (62), an opening is formed in the lower wall of the bottom of the communication part (62) of the fourth channel (622), and the first valve port (623) is formed in the upper wall of the bottom of the communication part (62).

9. The solenoid valve according to claim 7, characterized in that the valve assembly (4) further has a second elastic element (44), the second elastic element (44) having a first end (441) and a second end (442), the first end (441) being located axially below the second end (442), the sub-spool (42) of the non-return component having a first support surface (421), the first support surface (421) extending radially along the solenoid valve (100), the first end (441) of the second elastic element being seated against the first support surface (421), the second end (442) of the second elastic element being seated against a mounting portion (43); the sub valve core (42) is also provided with a limiting part, and the sub valve core (42) is in clearance fit with the mounting part (43); when the second valve port (415) is in a closed state, the sub valve core (42) is abutted against a necking section (4164) of the first channel for limiting.

10. The solenoid valve according to claim 7, characterized in that said sub-spool (42) can also be spherical or spheroidal, said sub-spool (42) being clearance-fitted with the wall of said small diameter section (4163), said sub-spool (42) being located between said mounting portion (43) and said reduced diameter section (4164), said sub-spool (42) being able to limit against said mounting portion (43) in the open state of said second port (415).

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