CN210566562U

CN210566562U - Electromagnetic valve

Info

Publication number: CN210566562U
Application number: CN201920872372.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-11
Publication date: 2020-05-19
Anticipated expiration: 2029-06-11
Also published as: CN210566265U

Abstract

The utility model provides a solenoid valve, includes elastic element and piston assembly, and piston assembly has first space, and elastic element's one end is located this first space, is favorable to preventing elastic element and piston assembly and drops.

Description

Electromagnetic valve

Technical Field

The utility model relates to a vehicle parts field, concretely relates to solenoid valve.

Background

The electromagnetic valve is used for switching on and off a flow path of an air conditioning system and comprises an elastic element and a piston assembly, and when the electromagnetic valve is used, the elastic element and the piston assembly are required to be matched with each other, but the elastic element can be separated from the piston assembly.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solenoid valve is favorable to reducing the risk that elastic element drops.

A solenoid valve comprising a communication portion, a first valve port of the solenoid valve being formed at an upper wall of the communication portion; the electromagnetic valve further comprises an iron core assembly, a coil assembly and a valve assembly, wherein the iron core assembly comprises a static iron core, a movable iron core, a sleeve and a valve seat, at least part of the static iron core is positioned on the inner periphery of the sleeve and fixed with the sleeve, at least part of the movable iron core is positioned on the inner periphery of the sleeve and can move relative to the sleeve, the coil assembly is sleeved on the outer periphery of the sleeve, and the sleeve and the valve seat are relatively fixed; the valve assembly comprises a piston assembly and an elastic element, at least part of the piston assembly is positioned in a cavity formed by the valve seat, the elastic element comprises a first end part and a second end part, and the second end part of the elastic element is abutted with the upper wall of the communication part;

the piston assembly comprises a first space, at least part of the first end portion is located in the first space, the wall forming the first space comprises a first wall and a second wall, the first end portion of the elastic element comprises a first end surface and an abutting surface, the abutting surface is formed on the side wall of the first end portion, the abutting surface is closer to the upper wall of the communication portion than the first end surface along the axial direction of the piston assembly, the first end surface can be in contact with the first wall, and at least part of the second wall can be in contact with the abutting surface.

The piston assembly is provided with a first space, the wall forming the first space comprises a first wall and a second wall, the first end of the elastic element comprises a first end face and a butting face, the first end face is in contact with the first wall, the butting face is formed on the side wall of the first end, the second wall can be in contact with the butting face, and the second wall can limit the elastic element in the radial direction and further is beneficial to preventing the elastic element from falling off.

Drawings

FIG. 1 is a perspective view of a solenoid valve;

3 FIG. 32 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 A 3- 3 A 3 of 3 FIG. 31 3; 3

FIG. 3 is an enlarged schematic view of the structure of the first embodiment of section C of FIG. 2;

FIG. 4 is an enlarged view of the portion B of FIG. 2;

FIG. 5 is a schematic perspective view of the valve support seat of FIG. 2;

FIG. 6 is a cross-sectional view of the valve support seat and seal assembly of FIG. 2;

FIG. 7 is a schematic view of the solenoid valve assembly assembled with the mounting station;

FIG. 8 is an enlarged view of the structure of the portion D in FIG. 7;

FIG. 9 is an enlarged view of the structure of the portion K in FIG. 7;

FIG. 10 is a cross-sectional structural view of the piston assembly of FIG. 2;

FIG. 11 is an enlarged view of the structure of the second embodiment of the section C in FIG. 2;

FIG. 12 is an enlarged view of the structure of the third embodiment of the section C in FIG. 2;

FIG. 13 is an enlarged view of the structure of the fourth embodiment of section C of FIG. 2;

FIG. 14 is an enlarged view of the structure of the fifth embodiment of the section C in FIG. 2;

FIG. 15 is an enlarged view of the structure of the sixth embodiment of the section C in FIG. 2;

FIG. 16 is a cross-sectional schematic view of another embodiment of a solenoid valve.

Detailed Description

The invention will be further explained with reference to the drawings and the detailed description below:

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.

Referring to fig. 1, 2 and 5, the solenoid valve 100 includes a valve supporting base 1, a coil assembly 2, a core assembly 3 and a valve assembly 4, the valve supporting base 1 includes a first mounting portion 10, at least a portion of the valve assembly 4 is located in a cavity formed by the first mounting portion 10, and is fixed relative to the first mounting portion 10, and in particular, the valve assembly 4 includes a valve seat 43, at least a portion of the valve seat 43 being located in the cavity formed by the first mounting portion 10, and is fixedly connected with the first mounting portion 10 and sealed at the connection position of the two, and the fixing mode can be welding or screw thread fixing, in the present embodiment, the valve seat 43 is screwed to the first mounting portion 10, and specifically, the valve seat 43 has a first external thread 431, the first mounting portion 10 has a first internal thread 102, the valve seat 43 is fixedly connected to the first mounting portion 10 by the first internal thread 102 and the first external thread 431. The electromagnetic valve further comprises a sleeve 34, at least part of the iron core assembly 3 is located on the inner periphery of the sleeve 34, specifically, the iron core assembly 3 comprises a movable iron core 31 and a stationary iron core 32, one end of the sleeve 34 extends into a hole formed by a valve seat 43 and is relatively fixed with the valve seat 43, at least part of the stationary iron core 32 is arranged in the sleeve 34 and is relatively fixed with the sleeve 34, at least part of the movable iron core 31 is arranged in the sleeve 34 and can move relative to the sleeve 34, and the movable iron core 31 is closer to the valve seat 43 than the stationary iron core 32. The coil assembly 2 includes a coil portion 21 and a magnetizer 22, the coil portion 21 is fixed to the magnetizer 22 in a clamping manner, the coil portion 21 includes a coil and an injection molding portion, the coil and the injection molding portion are integrally formed by injection molding, and of course, the coil and the injection molding portion can be respectively formed and then assembled into a whole. The periphery of sleeve pipe 34 is located to coil pack 2 cover, and in a specific embodiment, coil pack 2 passes through screw 50 and quiet iron core 32 thread tightening, and of course, coil pack can also realize through joint spare with the fixed of iron core subassembly. The iron core assembly 3 further comprises a first sealing gasket 33 and a first pressing sheet 35, wherein the first sealing gasket 33 is fixed at the lower end part of the movable iron core 31 through the first pressing sheet 35, so that on one hand, sealing between the valve assembly and the movable iron core 3 is facilitated, and on the other hand, noise generated by impact between the movable iron core 3 and the valve assembly when the electromagnetic valve is switched on and off is facilitated to be reduced.

The solenoid valve 100 comprises a first chamber 101, and the wall forming the first chamber 101 comprises at least the inner wall of the valve supporting seat 1, or alternatively, the wall forming the first chamber 101 further comprises the bottom wall of the valve seat 43, as shown in fig. 2. Referring to fig. 5 and 6, the valve supporting base 1 includes a connecting portion 17 and a communicating portion 18, and the communicating portion 18 is located below the connecting portion 17, or the communicating portion 18 is located farther from the coil block 2 than the connecting portion 17. The connection portion 17 is formed on the outer wall of the valve supporting base 1, and the connection portion 17 may be formed with an external thread, and the solenoid valve 100 is connected to other components through the external thread of the connection portion 17. The communication part 18 includes a first channel 11, a second channel 12 and a first valve port 13, wherein the first channel 11 penetrates through a side part of the communication part 18, the first channel 11 is formed with two openings at the side part of the communication part 18, wherein the first opening 111 of the first channel is located at an outer wall of the communication part 18, the other opening is located at an inner wall of the communication part 18, or the other opening is located at a wall forming the first chamber 101, and the first channel 11 is communicated with the first chamber 101. The second channel 12 is formed in the bottom of the communicating portion 18, the second channel 12 is opened in the lower wall of the bottom of the communicating portion 18, the first valve port 13 is formed in the upper wall of the bottom of the communicating portion 18, the second channel 12 can communicate with the first valve port 13, and the second channel 12 can communicate with the first chamber 101. Of course, the side of the communication portion 18 may be formed with a plurality of first passages 11 to enhance the connectivity of the outside of the solenoid valve with the first chamber 101. In the present embodiment, the communication portion 18 has four first passages 11, and the first passages 11 are uniformly arranged in the circumferential direction of the communication portion 18.

Referring to fig. 5 and 6, in the present embodiment, the valve seat 1 further includes an upper end surface 151 of the valve seat, the upper end surface 151 of the valve seat is closer to the coil assembly 2 than the connecting portion 17 and faces the coil assembly 2 along the axial direction of the first mounting portion 10, and the valve seat 1 has a recess 153 opposite to the upper end surface 151 of the valve seat. Accordingly, referring to fig. 2, the magnetic conductor 22 has a first protrusion 221, the first protrusion 221 protrudes toward the upper end surface 151 of the valve supporting seat relative to the other portion of the magnetic conductor 22, the first protrusion 221 is located in the recess 153 of the valve supporting seat, and the first protrusion 221 and the recess 153 of the valve supporting seat are matched with each other, so that the coil assembly 2 is favorably positioned and is convenient to install.

Referring to fig. 2, 5 and 6, the valve supporting seat 1 includes a first groove 16, the first groove 16 is closer to the coil assembly 2 than the connecting portion 17 along the axial direction of the first mounting portion, specifically, the first groove 16 is located between the upper end surface 151 of the valve supporting seat and the connecting portion 17, the first groove 16 is circumferentially disposed along the sidewall of the valve supporting seat 1, further, the solenoid valve 100 further includes a first sealing member 60, at least a portion of the first sealing member 60 is disposed in the first groove 16, after the solenoid valve 100 is mounted with other components, the other components may be a mounting table 200, the valve supporting seat 1 and the mounting table 200 extrude the first sealing member 60, and thus the sealing between the mounting table 200 and the valve supporting seat 1 is formed.

In a first embodiment, referring to fig. 7 and 8, a first groove 16 is located between the connection portion 17 and the first channel 11, the first groove 16 is recessed relative to the connection portion 17, or an outer diameter of a bottom wall of the first groove 16 is smaller than an outer diameter of the connection portion 17, the first groove 16 includes a first bottom wall 161 and a first upper side wall 162, the first sealing member 60 is disposed around the first bottom wall 161, wherein the first upper side wall 162 connects the first bottom wall 161 and the connection portion 17, accordingly, the mounting table 200 is formed with a second fitting portion 201, the second fitting portion 201 has a first flange 2011, the first flange 2011 is raised relative to other portions of the second fitting portion 201, an inner diameter of the first flange 2011 is smaller than an outer diameter of the connection portion 17, the first sealing member 60 is located in the first groove 16, the first flange 2011 of the second fitting portion 201 and the first upper side wall 162 can provide a support for the first sealing member 60, when the solenoid valve 100 is mounted on the mounting table 200, the first seal member 60 is prevented from slipping off, the mounting efficiency is improved, and the sealing performance can be enhanced.

The valve supporting seat 1 includes a second groove 19, and the second groove 19 is provided in the outer wall of the communicating portion 18 and is circumferentially provided along the outer wall of the communicating portion. For example, the second groove 19 may be circumferentially disposed along the sidewall of the communication portion 18, and the second groove 19 is further away from the coil assembly 2 than the first channel 11 along the axial direction of the first mounting portion 10, and the solenoid valve 100 further includes the second sealing member 70, at least a portion of the second sealing member 70 is disposed in the second groove 19, after the solenoid valve 100 is mounted with other components, the other components may be the mounting table 200, and the valve supporting seat 1 and the mounting table 200 press the second sealing member 70 to form a seal between the mounting table 200 and the valve supporting seat 1, so that the fluid of the first channel 11 is communicated with the second channel 12 only through the first valve port 13. In the first embodiment, referring to fig. 7 and 9, the second groove 19 is recessed with respect to the side wall of the communication portion 18, the second groove 19 is located between the first channel 11 and the lower wall of the bottom of the communication portion in the axial direction of the first mounting portion 10, the second groove 19 includes a second bottom wall 191 and a second upper side wall 192, wherein the second bottom wall 191 connects the second upper side wall 192 and the lower wall of the bottom of the communication portion, accordingly, the mounting table 200 is formed with a third fitting portion 202, the third fitting portion 202 has a second flange 2021, the second flange 2021 is raised with respect to the rest of the third fitting portion 202, the inner diameter of the second flange 2021 is smaller than the outer diameter of the communication portion 18, the second seal 70 is located in the second groove 19, specifically, the second seal 70 is disposed around the second bottom wall 191, the second flange 2021 of the third fitting portion 202 and the second upper side wall 192 can provide support for the second seal 70, when the solenoid valve 100 is mounted, the second seal 70 is prevented from slipping off, the mounting efficiency is improved, and the sealing performance can be enhanced. In this embodiment, the solenoid valve 100 is mounted on another component, and the solenoid valve 100 is detachably connected to the another component through a connecting portion, in this embodiment, the another component is a mounting table 200, referring to fig. 7, a second external thread 171 is formed on the connecting portion 17 of the valve support seat, a second matching portion 201 of the mounting table 200 is matched with the connecting portion 17, a second internal thread 2002 is formed on the second matching portion 201, the second internal thread 2002 is matched with the second external thread 171 of the connecting portion, and the solenoid valve 100 is mounted on the mounting table 200 under the action of the second internal thread 2002 and the second external thread 171, so that the mounting step can be simplified, the operation is simple, the quick mounting of the solenoid valve 100 is realized, and the maintenance and the replacement of the solenoid; it is understood that the solenoid valve 100 and the mounting platform may be fixedly connected by different methods such as welding.

Referring to fig. 2 and 10 in combination, the valve assembly 4 includes a piston assembly 41, the valve seat 43 has a guide portion 432, when the piston assembly 41 is actuated, a part of the piston assembly 41 is located in a cavity formed by the guide portion, the piston assembly 41 has a first matching portion 411, the first matching portion 411 is in sliding contact with the guide portion 432, so that the piston assembly 41 performs axial movement along the guide portion 432, and the piston assembly is prevented from deviating from the axial movement, where "axial direction of the piston assembly" refers to a movement direction or an up-down direction of the piston assembly, and a radial direction of the piston assembly is perpendicular to the axial direction of the piston assembly. In other embodiments, the valve assembly 4 further includes an elastic element 42, one end of the elastic element abutting against the piston assembly is defined as a first end portion 421, one end of the elastic element abutting against the bottom wall of the communication portion is defined as a second end portion 422, the first end portion 421 of the elastic element 42 abuts against the piston assembly 41, and the second end portion 422 of the elastic element 42 abuts against the upper wall of the communication portion 18.

Referring to fig. 1, 3 and 10, the piston assembly 41 includes a first space 4110, the first space 4110 is closer to the upper wall of the communication portion 18 than the first matching portion 411 is in the axial direction of the piston assembly 41, the first space 4110 is recessed relative to the side wall of the first matching portion 411, and at least a portion of the first end portion 421 is located in the first space 4110. Specifically, referring to fig. 3, the walls forming the first space 4110 include a first wall 4101, a second wall 4102, a third wall 4103, and a fourth wall 4104, at least a part of the fourth wall 4104 is disposed opposite to the first wall 4101, the third wall 4103 is disposed between the first wall 4101 and the fourth wall 4104 in the axial direction of the piston assembly 41, the fourth wall 4104 is closer to the upper wall 180 of the communicating portion than the first wall 4101, the fourth wall 4104 is closer to the upper wall 180 of the communicating portion than the second wall 4102 of the fourth wall 4104, and the second wall 4102 is disposed between the side wall of the first fitting portion 411 and the third wall 4103 in the radial direction of the piston assembly 41. More specifically, the first wall 4101 extends from a side wall of the first fitting portion 411 to the third wall 4103, and the fourth wall 4104 extends from the second wall 4102 to the third wall 4103. The first end portion 421 includes a first end surface 4211 and an abutment surface 4212, the abutment surface 4212 is formed on a side wall of the first end portion 421, specifically, an inner wall of the first end portion, the first end surface 4211 is closer to an axis of the piston assembly 41 than the abutment surface 4212 along a radial direction of the piston assembly 41, the first end surface 4211 can contact with the first wall 4101, where "the first end surface 4211 can contact with the first wall 4101" means that the first end surface is in contact with the first wall in a normal state; the first end face may also be separated from the first wall when the solenoid valve is not operating due to vibration or other reasons. At least part of the second wall 4102 can be in contact with the abutment surface 4212, where "can" include the following: the contact surface 4212 is in contact with at least a portion of the second wall 4102, or the contact surface 4212 is close to the second wall 4102, and when the medium impacts the elastic element 42, the contact surface 4212 is in contact with at least a portion of the second wall 4102. Since the second wall 4102 is closer to the contact surface 4212 than the third wall 4103, when the elastic element receives an impact, the elastic element 42 is displaced, the second wall 4102 can contact the contact surface, and the second wall 4102 can limit the elastic element in the radial direction, which is advantageous for preventing the elastic element 42 from being separated from the piston assembly 41.

In another embodiment, referring to fig. 12, first space 4110 is recessed with respect to a side wall of piston assembly 41, the wall of first space 4110 does not include fourth wall 4104, that is, the wall of first space 4110 includes first wall 4101, second wall 4102 and third wall 4103, second wall 4102 is closer to upper wall 180 of the communication portion than first wall 4101 along the axial direction of piston assembly 41, at least a portion of first wall 4101 and second wall 4102 are disposed opposite to each other, and first wall 4101 and second wall 4102 extend from the side wall of piston assembly 41 to the side wall of piston assembly 41, that is, first wall 4101 extends from the side wall of piston assembly 41 to third wall 4103, and second wall 4102 extends from the side wall of piston assembly 41 to third wall 4103. The second wall 4102 includes a head end 4108 and a tail end 4109, the head end 4108 is closer to the upper wall of the communicating portion 18 than the tail end 4109 in the axial direction of the piston assembly 41, the head end 4108 of the second wall 4102 is closer to the contact surface 4212 than the tail end 4109 of the second wall 4102 in the radial direction of the piston assembly 41, and the head end 4108 is closer to the contact surface 4212 or contacts the contact surface 4212. When the elastic element 42 receives an impact, the head end 4108 of the second wall 4102 contacts the contact surface 4212 or first contacts the contact surface 4212, and the head end 4108 of the second wall 4102 limits the elastic element 42, which is beneficial to preventing the elastic element 42 from separating from the piston assembly 41. The wall of the first space 4110 does not include the fourth wall 4104, which relatively simplifies the processing of the first space 4110. It should be noted that the head end refers to one end of the second wall, or the head end is a range extending from one end of the second wall to the tail end by a certain distance; the trailing end herein refers to the opposite end of the second wall, or the leading end is a range extending from the opposite end of the second wall toward the leading end by a certain distance.

Moreover, the wall of the first space 4110 may not include the third wall 4103, that is, the wall of the first space 4110 includes the first wall 4101 and the second wall 4102, please refer to fig. 11, the first wall 4101 extends from the side wall of the first matching portion to the tail end 4109, since the head end 4108 is farther from the axis of the piston assembly than the tail end 4109, when the elastic element 42 is impacted, the head end 4108 of the second wall 4102 first contacts the abutting surface 4212, and the head end 4108 of the second wall 4102 limits the elastic element 42, which is beneficial to preventing the elastic element 42 from separating from the piston assembly 41. The wall of the first space 4110 does not include the third wall 4103, which can further simplify the structure of the first space 4110 and facilitate the fabrication of the first space 4110.

Referring to fig. 15, the first space 4110 is recessed with respect to the bottom wall of the piston assembly 41, the first space 4110 has an opening on the bottom wall of the piston assembly 41, the walls forming the first space 4110 include a first wall 4101 and a second wall 4102, at least a portion of the first wall 4101 is disposed opposite to the second wall 4102, the first wall 4101 extends from the bottom wall of the piston assembly 41 to the second wall 4102, and the second wall 4102 extends from the bottom wall of the piston assembly 41 to the first wall 4101, or the first wall 4101 and the second wall 4102 intersect. In the radial direction of piston assembly 41, second wall 4102 is closer to the axis of piston assembly 41 than first wall 4101, and trailing end 4109 of second wall 4102 is closer to the axis of piston assembly 41 than leading end 4108 of second wall 4102; in the axial direction of the piston assembly 41, the leading end 4108 of the second wall 4102 is closer to the upper wall of the communicating portion 18 than the trailing end 4109 of the second wall 4102. The contact surface 4212 is formed on the inner wall of the first end 421, the first end 4211 is closer to the axis of the piston assembly 41 than the contact surface 4212, the first wall 4101 is in contact with the first end 4211, the head end 4108 of the second wall 4102 is in contact with the contact surface 4212, or the elastic element is in contact when a refrigerant impacts. Referring to fig. 14, in contrast to the arrangement shown in fig. 15, in the radial direction of piston assembly 41, first wall 4101 is closer to the axis of piston assembly 41 than second wall 4102, and the leading end 4108 of second wall 4102 is closer to the axis of piston assembly 41 than the trailing end 4109 of second wall 4102; the first wall 4101 is in contact with the first end surface 4211, the contact surface 4212 is located on the outer wall of the first end 421, and the head end 4108 of the second wall 4102 is in contact with the contact surface 4212 or the elastic element 42 is in contact when a refrigerant impacts. Likewise, the wall of the first space 4110 does not include the third wall 4103, which can further simplify the structure of the first space 4110. The walls of the first space 4110 include only the first wall and the second wall, and the structure of the first space 4110 is relatively simple. Referring to fig. 13, in contrast to the embodiment of fig. 15, the wall forming the first space 4110 further includes a third wall 4103, and the third wall 4103 is located between the second wall 4102 and the first wall 4101 along the radial direction of the piston assembly, where the third wall 4103 may be a plane or an arc, for example, the third wall 4103 may be chamfered or rounded, so as to facilitate the processing and forming of the first space 4110.

In this embodiment, referring to fig. 10, the piston assembly 41 further includes a second valve port 414, a second gasket 415, and a second pressing plate 416, wherein the second gasket 415 is fixed to the lower end of the piston assembly 41 through the second pressing plate 416; the second valve port 414 is formed on the upper end surface of the piston assembly 41, and when the plunger 31 moves axially, the first sealing gasket 33 can contact and/or separate from the second valve port 414, thereby opening or closing the second valve port 414, and facilitating the sealing between the piston assembly 41 and the second valve port 414.

Referring to fig. 4 and 10, the piston assembly 41 further includes a piston ring 418, the first fitting portion 411 includes a first recess 4112, the piston ring 418 is located in the first recess 4112, the piston ring 418 is in sliding contact with the guide portion 432, specifically, the guide portion 432 has a first side wall 4331, the first fitting portion 411 of the piston assembly has a second side wall 4111, the second side wall 4111 is along the circumference of the first fitting portion 411, and the second side wall 4111 is in sliding contact with the first side wall 4331. The first matching portion 411 further includes at least one second concave portion 4113, the second concave portion 4113 is disposed along a circumferential direction of the first matching portion 411, in this embodiment, the first matching portion 411 includes two second concave portions 4113, the second concave portion 4113 is recessed relative to the second side wall 4111, or an opening of the second concave portion is located on the second side wall 4111, the two second concave portions are respectively located on two sides of the first concave portion 4112, or in an axial direction of the first mounting portion 10, the first concave portion 4112 is located between the two second concave portions 4113, since foreign objects are easily generated during sliding of the piston assembly 41 along the guide portion, or the working medium contains foreign objects, the second concave portion 4113 can contain foreign objects in the working medium, which is beneficial to reducing risks of blocking and abrasion of the piston ring 418, and reducing risks of seizure of the piston assembly 41; of course, the guide portion 43 may be provided with one second recess, or a plurality of second recesses, the second recesses may be annular grooves distributed along the circumferential direction, or may be in a single arc shape or a plurality of arc shapes, and the recessed shape of the second recesses may be in different shapes such as a triangle, a square, and a trapezoid. It will be appreciated that the second recess may also be provided in the guide portion, or both the guide portion and the first mating portion may be provided with the second recess.

Referring to fig. 16, compared with the solution shown in fig. 2, the valve seat 43 is fixed relative to the valve body 1 ', the valve body 1 ' includes a first mounting portion 10, at least a part of the valve assembly is located in a cavity formed by the first mounting portion 10, the valve seat is fixedly connected to the first mounting portion 10, the solenoid valve further includes a first cavity 101, and a wall forming the first cavity 101 at least includes an inner wall of the valve body 1 '; the valve body 1 ' includes a first channel 11 ' and a second channel 12 ', and the first valve port 13 ', the first channel 11 ' is closer to the coil assembly than the second channel 11 ', the first channel 11 ' is communicated with the first chamber 101, and the second channel 11 ' can be communicated with the first chamber 101 through the first valve port 13 '.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof can be modified or substituted by the same by those skilled in the art without departing from the spirit and scope of the present invention, which should be covered by the claims of the present invention.

Claims

1. A solenoid valve comprising a communication portion, a first valve port of the solenoid valve being formed at an upper wall of the communication portion; the electromagnetic valve further comprises an iron core assembly, a coil assembly and a valve assembly, wherein the iron core assembly comprises a static iron core, a movable iron core, a sleeve and a valve seat, at least part of the static iron core is positioned on the inner periphery of the sleeve and fixed with the sleeve, at least part of the movable iron core is positioned on the inner periphery of the sleeve and can move relative to the sleeve, the coil assembly is sleeved on the outer periphery of the sleeve, and the sleeve and the valve seat are relatively fixed; the valve assembly comprises a piston assembly and an elastic element, at least part of the piston assembly is positioned in a cavity formed by the valve seat, the elastic element comprises a first end part and a second end part, and the second end part of the elastic element is abutted with the upper wall of the communication part;

2. The solenoid valve of claim 1, wherein the first space is recessed with respect to an outer wall of the piston assembly, at least a portion of the first wall and the second wall are disposed opposite to each other, the second wall includes a head end and a tail end, the head end is closer to the upper wall of the communication portion than the tail end in an axial direction of the piston assembly, the head end is closer to the abutment surface than the tail end in a radial direction of the piston assembly, and the head end is closer to or contacts the abutment surface.

3. The solenoid valve according to claim 2, wherein the first wall and the second wall extend from the side wall of the piston assembly away from the side wall of the piston assembly, the second wall being closer to the upper wall of the communication portion than the first wall in the axial direction of the piston assembly;

the abutting surface is formed on an inner wall of the first end portion, the trailing end is closer to an axis of the piston assembly than the leading end in a radial direction of the piston assembly, and the first end surface is closer to the axis of the piston assembly than the abutting surface.

4. The solenoid valve of claim 2 wherein the first wall and the second bottom wall extend from the bottom wall of the piston assembly away from the bottom wall of the piston assembly;

the second wall is closer to the axis of the piston assembly than the first wall along the radial direction of the piston assembly, the abutting surface is formed on the inner wall of the first end portion, and the first end surface is closer to the axis of the piston assembly than the abutting surface; alternatively, the first wall is closer to the axis of the piston assembly than the second wall, and the abutment surface is formed on an outer wall of the elastic member, the abutment surface being closer to the axis of the piston assembly than the first end surface.

5. The solenoid valve of claim 3 wherein the walls forming the first space further comprise a third wall connecting the first wall and the second wall, the third wall being located between the first wall and the second wall; alternatively, the first wall extends from the outer wall of the piston assembly to the second wall, and the second wall extends from the outer wall of the piston assembly to the first wall.

6. The solenoid valve of claim 4 wherein the walls forming the first space further comprise a third wall connecting the first wall and the second wall, the third wall being located between the first wall and the second wall; alternatively, the first wall extends from the outer wall of the piston assembly to the second wall, and the second wall extends from the outer wall of the piston assembly to the first wall.

7. The electromagnetic valve according to claim 1, wherein the second wall is closer to an upper wall of the communication portion than the first wall in an axial direction of the piston assembly;

the walls forming the first space further include a third wall and a fourth wall, at least a portion of the fourth wall being disposed opposite the first wall, the third wall connecting the first wall and the fourth wall, the fourth wall extending from the second wall to the third wall, the first wall extending from the sidewall of the piston assembly to the third wall; the second wall is located between the third wall and a side wall of the piston assembly in a radial direction of the piston assembly, and the first end surface is closer to an axis of the piston assembly than the abutting surface.

8. The electromagnetic valve according to any one of claims 1 to 7, wherein the valve seat includes a guide portion, and the respective piston assemblies have first engagement portions, and the first space is closer to an upper wall of the communication portion than the first engagement portions in an axial direction of the piston assemblies;

said guide having a first side wall, said piston assembly including a piston ring, said first mating portion including a first recess in which said piston ring is located, said piston ring being in sliding contact with said first side wall, said first mating portion having a second side wall in sliding contact with said first side wall; the guide portion and/or the first mating portion have at least one second recess.

9. The solenoid valve of claim 8, wherein the solenoid valve comprises a valve body including a first mounting portion, at least a portion of the valve assembly being located in a cavity formed by the first mounting portion, the valve seat being fixedly coupled to the first mounting portion, the solenoid valve further comprising a first cavity, a wall forming the first cavity including at least an inner wall of the valve body; the valve body includes a first passage and a second passage, and the first valve port, the first passage being closer to the coil assembly than the second passage, the first passage being in communication with the first chamber, the second passage being capable of communicating with the first chamber through the first valve port.

10. The solenoid valve of claim 8, wherein the solenoid valve comprises a valve support seat, wherein the valve support seat comprises a first mounting portion, at least a portion of the valve assembly is located in a cavity formed by the first mounting portion, the valve seat is fixedly connected with the first mounting portion, the solenoid valve further comprises a first cavity, a wall forming the first cavity comprises at least an inner wall of the valve support seat, the valve support seat comprises a connecting portion and the communicating portion, the communicating portion is farther away from the coil assembly than the connecting portion, the communicating portion comprises a first channel, a second channel and the first valve port, the first channel is communicated with the first cavity, a first opening of the first channel is formed in an outer wall of the communicating portion, and the second channel is communicated with the first cavity through the first valve port; the connecting portion enables the solenoid valve to be detachably connected with the mounting table.

11. The solenoid valve of claim 10 further comprising a first groove circumferentially disposed along a sidewall of the valve support base, the first groove disposed closer to the coil assembly than the communication portion in an axial direction of the first mounting portion, the solenoid valve further comprising a first seal member, at least a portion of the first seal member being disposed in the first groove;

the solenoid valve still includes the second recess, the second recess form in the outer wall of intercommunication portion, follow the outer wall of intercommunication portion becomes circumference setting, along the axis direction of first installation department, the second recess is than the first opening of first passageway is kept away from the coil pack, the solenoid valve still includes the second sealing member, at least part the second sealing member is located the second recess.