CN219177046U - Electromagnetic valve - Google Patents

Abstract

The utility model discloses a solenoid valve, which comprises: the valve body is provided with a magnetic core installation cavity, a first channel and a second channel; a static magnetic core fixed relative to the valve body; and the movable magnetic core is arranged in the magnetic core mounting cavity, can move relative to the valve body by utilizing electromagnetic force between the movable magnetic core and the static magnetic core, and is used for opening the first channel and/or the second channel so as to enable the first channel to be communicated with the second channel or blocking the first channel and/or the second channel so as to enable the communication between the first channel and the second channel to be blocked. The electromagnetic valve has the advantages of few parts, simple structure, convenience in assembly and the like.

Description

Electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve.

Background

The solenoid valve in the related art is generally provided with a flow channel for liquid to flow, and structures such as a valve plug are arranged in a valve body of the control valve so as to control the on-off of the flow channel, however, the control valve in the related art has a large number of parts, and a plurality of parts are required to cooperatively work when the flow channel is switched between on and off, so that the solenoid valve is complex in matching structure and unfavorable for assembly.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a solenoid valve which has advantages of few parts, simple structure, easy assembly, etc.

In order to achieve the above object, according to an embodiment of the present utility model, there is provided a solenoid valve including: the valve body is provided with a magnetic core installation cavity, a first channel and a second channel; a static magnetic core fixed relative to the valve body; and the movable magnetic core is arranged in the magnetic core mounting cavity, can move relative to the valve body by utilizing electromagnetic force between the movable magnetic core and the static magnetic core, and is used for opening the first channel and/or the second channel so as to enable the first channel to be communicated with the second channel or blocking the first channel and/or the second channel so as to enable the communication between the first channel and the second channel to be blocked.

The electromagnetic valve provided by the embodiment of the utility model has the advantages of few parts, simple structure, convenience in assembly and the like.

According to some embodiments of the utility model, the outer peripheral surface of the moving core cooperates with the inner peripheral surface of the core mounting cavity to define the moving core as being movable in the axial direction of the core mounting cavity.

According to some embodiments of the utility model, the valve body is configured with a sealing surface surrounding the first passage and facing the moving core, the first passage and the second passage communicating when the moving core is separated from the sealing surface, the communication of the first passage and the second passage being blocked when the moving core is stopped against the sealing surface.

According to some embodiments of the utility model, the core mounting cavity and the first passage each extend in an axial direction of the valve body, the second passage extends in a radial direction of the valve body, and the second passage is located on a side of the first passage facing the moving core.

According to some embodiments of the utility model, a weight-reducing groove is provided at an end of the moving magnetic core facing the first passage, and a cross-sectional area of the weight-reducing groove is smaller than a cross-sectional area of the first passage.

According to some embodiments of the utility model, the weight-reducing groove has a first central axis along an axial direction of the first channel, the first central axis coinciding with a central axis of the first channel.

According to some embodiments of the utility model, an inner wall of the second channel on a side of the second channel adjacent to the first channel is flush with the sealing surface.

According to some embodiments of the utility model, the second channels are a plurality, and the second channels are arranged at intervals along the circumferential direction of the first channel; when the movable magnetic core is abutted with the sealing surface, the port of one end of each second channel facing the first channel is blocked.

According to some embodiments of the utility model, the valve body is configured with an outwardly protruding sleeve portion through which the core mounting cavity extends, the static magnetic core being mounted to an outer end of the sleeve portion, the dynamic magnetic core being located on a side of the static magnetic core facing the first passage.

According to some embodiments of the utility model, at least a portion of the static magnetic core is mounted within the magnetic core mounting cavity, the dynamic magnetic core extending into the sleeve portion.

According to some embodiments of the utility model, the area surrounded by the outer contour of the cross-section of the sleeve portion is smaller than the area surrounded by the outer contour of the cross-section of the rest of the valve body, the cross-section of the sleeve portion and the cross-section of the rest of the valve body each being a cross-section perpendicular to the axial direction of the sleeve portion.

According to some embodiments of the utility model, the solenoid valve further comprises: the elastic piece is positioned between the movable magnetic core and the static magnetic core, and two ends of the elastic piece are respectively abutted against the movable magnetic core and the static magnetic core; when the electromagnetic valve is electrified, the movable magnetic core controls the communication between the first channel and the second channel by utilizing electromagnetic force between the movable magnetic core and the static magnetic core; when the electromagnetic valve is powered off, the movable magnetic core controls the communication between the first channel and the second channel to be blocked under the elasticity of the elastic piece.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a cross-sectional view of a solenoid valve according to an embodiment of the utility model.

Fig. 2 is an exploded view of a solenoid valve according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of a valve body of the solenoid valve according to the embodiment of the utility model.

Fig. 4 is a cross-sectional view of a valve body of a solenoid valve according to an embodiment of the utility model.

Fig. 5 is a schematic structural view of a static core of a solenoid valve according to an embodiment of the utility model.

Fig. 6 is a schematic structural view of a moving core of a solenoid valve according to an embodiment of the utility model.

Fig. 7 is a cross-sectional view of a moving core of a solenoid valve according to an embodiment of the utility model.

Reference numerals:

a solenoid valve 1,

The valve body 100, the magnetic core installation cavity 110, the first passage 121, the second passage 122, the sealing surface 130, the sleeve part 140, the static magnetic core 200, the second fixing groove 210, the dynamic magnetic core 300, the weight-reducing groove 310, the first fixing groove 320, and the elastic member 400.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

The solenoid valve 1 according to an embodiment of the present utility model is described below with reference to the drawings.

As shown in fig. 1 to 7, the solenoid valve 1 according to the embodiment of the utility model includes a valve body 100, a stationary core 200, and a moving core 300.

The valve body 100 is provided with a magnetic core installation cavity 110, a first passage 121 and a second passage 122, the static magnetic core 200 is fixedly installed to the valve body 100, at least a part of the moving magnetic core 300 is provided to the magnetic core installation cavity 110, the moving magnetic core 300 is movable relative to the valve body 100 by utilizing electromagnetic force with the static magnetic core 200 to open the first passage 121 and/or the second passage 122 so that the first passage 121 and the second passage 122 communicate, or to close the first passage 121 and/or the second passage 122 so that communication of the first passage 121 and the second passage 122 is blocked.

The electromagnetic valve 1 can be used as a control switch of the refrigerant flow of an air conditioning system.

According to the solenoid valve 1 of the embodiment of the utility model, the valve body 100 is provided with the magnetic core installation cavity 110, the first passage 121 and the second passage 122, wherein the magnetic core installation cavity 110 can be respectively communicated with the first passage 121 and the second passage 122, the static magnetic core 200 is fixedly installed on the valve body 100, and the movable magnetic core 300 can move relative to the valve body 100. In this way, the valve body 100 can be used to determine the relative position range of the moving core 300 and the static core 200, and the first passage 121 and the second passage 122 can be supplied with liquid (e.g., coolant) to flow, and the solenoid valve 1 can control the flow and interruption of the liquid in the first passage 121 and the second passage 122 by controlling the on-off of the first passage 121 and the second passage 122.

And, at least a part of the moving core 300 is provided in the core mounting chamber 110, and the moving core 300 uses electromagnetic force with the static magnetic core 200 to open the first passage 121 and/or the second passage 122 so that the first passage 121 and the second passage 122 communicate, or to close the first passage 121 and/or the second passage 122 so that communication of the first passage 121 and the second passage 122 is blocked.

For example, when the solenoid valve 1 is energized to generate electromagnetic force between the movable core 300 and the stationary core 200, the first passage 121 and the second passage 122 of the valve body 100 may communicate when the movable core 300 moves in a direction approaching the stationary core 200, the first passage 121 and the second passage 122 of the valve body 100 may be interrupted from communicating when the solenoid valve 1 is de-energized, or the first passage 121 and the second passage 122 of the valve body 100 may be interrupted from communicating when the solenoid valve 1 is energized to generate electromagnetic force between the movable core 300 and the stationary core 200, the first passage 121 and the second passage 122 of the valve body 100 may be interrupted from communicating when the movable core 300 moves in a direction approaching the stationary core 200, and the first passage 121 and the second passage 122 of the valve body 100 may communicate to thereby effect communication and disconnection of the first passage 121 and the second passage 122 when the solenoid valve 1 is de-energized.

Compared with the electromagnetic valve in the related art, by additionally arranging components such as a valve plug and the like for blocking the first channel and the second channel, the electromagnetic valve 1 in the embodiment of the utility model can realize the connection and disconnection of the first channel 121 and the second channel 122 only by the cooperation of the static magnetic core 200 and the movable magnetic core 300, that is, the movable magnetic core 300 serves as the component for blocking the first channel 121 and/or the second channel 122, so that the number of parts of the electromagnetic valve 1 is reduced, the structure of the electromagnetic valve 1 is simpler, the assembly steps are facilitated to be simplified, the assembly is more convenient, in addition, the parts of the electromagnetic valve 1 are fewer, the cooperation between the internal parts of the electromagnetic valve 1 in the state switching process is simpler, the cooperation between the movable magnetic core 300 and the first channel 121 and the second channel 122 is more reliable, and the working performance of the electromagnetic valve 1 is more stable.

Thus, the electromagnetic valve 1 according to the embodiment of the utility model has the advantages of fewer parts, simple structure, convenience in assembly and the like.

In some embodiments of the present utility model, as shown in fig. 1, the outer circumferential surface of the moving core 300 cooperates with the inner circumferential surface of the core mounting cavity 110 to define the moving core 300 to be movable in the axial direction of the core mounting cavity 110.

For example, the outer peripheral surface of the movable magnetic core 300 may be attached to the inner peripheral surface of the magnetic core mounting cavity 110, so that the magnetic core mounting cavity 110 may limit the radial direction of the movable magnetic core 300, so as to prevent the movable magnetic core 300 from shaking along the radial direction thereof, and further prevent noise generated by collision between the outer peripheral surface of the movable magnetic core 300 and the inner peripheral surface of the magnetic core mounting cavity 110, and the magnetic core mounting cavity 110 may guide the axial movement of the movable magnetic core 300, so that the movable magnetic core 300 may move axially along the axial direction thereof to approach or separate from the static magnetic core 200.

In some embodiments of the present utility model, as shown in fig. 1-4, the valve body 100 is configured with a sealing surface 130, the sealing surface 130 surrounds the first channel 121 and faces the moving core 300, when the moving core 300 is separated from the sealing surface 130, the first channel 121 and the second channel 122 are communicated, and when the moving core 300 is abutted against the sealing surface 130, the communication between the first channel 121 and the second channel 122 is blocked.

For example, the sealing surface 130 is a plane, and the sealing surface 130 may be disposed at an end of the first channel 121 facing the moving magnetic core 300, and the sealing surface 130 surrounds the first channel 121 along a circumferential direction of the first channel 121, so that the moving magnetic core 300 is convenient to cooperate with the sealing surface 130, and the moving magnetic core 300 and the sealing surface 130 are abutted, so that the moving magnetic core 300 and the sealing surface 130 can be abutted and sealed, thereby blocking the end of the first channel 121 facing the moving magnetic core 300, and further disconnecting the first channel 121 and the second channel 122.

Further, as shown in fig. 1, 2 and 4, the magnetic core mounting cavity 110 and the first channel 121 extend along the axial direction of the valve body 100, where the moving magnetic core 300 may be a cylinder, the axial direction of the valve body 100 is the axial direction of the moving magnetic core 300, and the second channel 122 extends along the radial direction of the valve body 100, where the radial direction of the valve body 100 is the radial direction of the moving magnetic core 300, and the second channel 122 is located on one side of the first channel 121 facing the moving magnetic core 300.

The first channel 121 may be a cylindrical hole, a tapered hole, or a curved hole, and the second channel 122 may be a circular hole, an elliptical hole, or an oblong hole.

Thus, the end of the first channel 121 facing the end of the moving core 300 may be configured on the side wall of the second channel 122, and the second channel 122 may be a plurality of second channels 122 disposed at intervals along the axial direction of the valve body 100, that is, the plurality of second channels 122 surround the first channel 121 along the axial direction of the first channel 121, so that the sealing surface 130 is configured on the end surface of the first channel 121 facing the end of the moving core 300, and the sealing surface 130 may surround the first channel 121 along the circumferential direction of the first channel 121, so that the moving core 300 can completely surround the circumferential direction of the first channel 121 after abutting against the sealing surface 130 to block the first channel 121 and the second channel 122.

In addition, the second channel 122 can be closed by the outer peripheral surface of the movable magnetic core 300, the first channel 121 can be closed by the end surface of the movable magnetic core 300 facing the first channel 121, so that the movable magnetic core 300 can be used for sealing the first channel 121 and the second channel 122, and the movable magnetic core 300 can more reliably separate the first channel 121 and the second channel 122.

In some embodiments of the present utility model, as shown in fig. 1, 2 and 7, the end of the moving core 300 facing the first passage 121 is provided with a weight-reducing groove 310, and the cross-sectional area of the weight-reducing groove 310 is smaller than that of the first passage 121.

By providing the weight-reducing groove 310, the material consumption of the movable magnetic core 300 can be reduced, the manufacturing cost of the movable magnetic core 300 can be reduced, and the mass of the movable magnetic core 300 can be reduced, when the electromagnetic valve 1 is electrified, electromagnetic force is generated between the movable magnetic core 300 and the static magnetic core 200, and the movable magnetic core 300 can move more easily due to the reduction of the mass of the movable magnetic core 300.

Moreover, the cross-sectional area of the weight-reducing groove 310 is smaller than that of the first channel 121, so that the movable magnetic core 300 can be matched with the sealing surface 130, and the inner peripheral wall of the weight-reducing groove 310 can extend beyond the first channel 121 inwards along the radial direction of the first channel 121, so that the contact area between the movable magnetic core 300 and the sealing surface 130 can be ensured to be larger, the sealing effect between the movable magnetic core 300 and the sealing surface 130 is ensured, and the liquid flow in the first channel 121 and the second channel 122 is effectively blocked.

In some embodiments of the present utility model, as shown in fig. 1, 2 and 4, the inner wall of the side of the second channel 122 adjacent to the first channel 121 is flush with the sealing surface 130.

In this way, the structure of the valve body 100 can be simplified, the processing and manufacturing of the valve body 100 can be facilitated, the sealing surface 130 can be configured on the inner wall of the side, close to the first channel 121, of the second channel 122, and the area of the sealing surface 130 can be larger, so that the matching between the moving magnetic core 300 and the sealing surface 130 is facilitated, the contact area between the moving magnetic core 300 and the sealing surface 130 is facilitated to be increased, and the tightness between the moving magnetic core 300 and the sealing surface 130 is further improved. And, when there is a gap between the sealing surface 130 and the moving core 300, the first channel 121 and the second channel 122 can be immediately communicated, so that the speed of switching between the off state and the on state between the first channel 121 and the second channel 122 is increased, in addition, when the size of the second channel 122 in the moving direction of the moving core 300 is unchanged, the moving core 300 can realize complete communication between the first channel 121 and the second channel 122 only when the size of the second channel 122 in the moving direction of the moving core 300 is required to be moved, and the stroke of the moving core 300 can be reduced, so that the size of the whole electromagnetic valve 1 in the moving direction of the moving core 300 can be reduced, and the miniaturization setting of the electromagnetic valve 1 is facilitated.

In some embodiments of the present utility model, as shown in fig. 1-4, the second channels 122 are plural, and the plural second channels 122 are arranged at intervals along the circumferential direction of the first channel 121, and when the moving core 300 abuts against the sealing surface 130, a port of one end of each second channel 122 facing the first channel 121 is blocked.

By providing the plurality of second passages 122, the flow rate of the solenoid valve 1 can be increased, and the movable core 300 can ensure that the connection between the first passage 121 and the second passage 122 is reliably interrupted by blocking the port of the second passage 122 toward the end of the first passage 121, thereby improving the reliability of the solenoid valve 1.

In some embodiments of the present utility model, as shown in fig. 1 to 4, the valve body 100 is constructed with a sleeve part 140 protruding outward, the core mounting cavity 110 penetrates the sleeve part 140, the static core 200 is mounted to the outer end of the sleeve part 140, and the dynamic core 300 is located at a side of the static core 200 facing the second passage 122.

Specifically, the valve body 100 and the sleeve portion 140 are integrally configured, the sleeve portion 140 may be disposed at an end of the movable magnetic core 300 opposite to the second channel 122, the sleeve portion 140 may fix the static magnetic core 200, the electromagnetic valve 1 is energized, the movable magnetic core 300 moves in a direction approaching to the static magnetic core 200 under the action of electromagnetic force, so that the movable magnetic core 300 is far away from the second channel 122, and the movable magnetic core 300 is separated from the sealing surface 130, so that conduction between the first channel 121 and the second channel 122 is achieved, and liquid may normally circulate in the first channel 121 and the second channel 122.

In addition, the static magnetic core 200 is mounted at the outer end of the sleeve part 140, that is, the static magnetic core 200 is not completely mounted in the valve body 100, so that on one hand, the volume of the valve body 100 can be smaller, and on the other hand, the static magnetic core 200 and the valve body 100 can be assembled outside the valve body 100, so that the assembly and the disassembly are more convenient.

In some embodiments of the present utility model, as shown in fig. 1, at least a portion of the static core 200 is mounted in the core mounting cavity 110, and the dynamic core 300 extends into the sleeve portion 140.

Thus, the part of the static magnetic core 200 extending into the magnetic core installation cavity 110 can be fixedly connected with the magnetic core installation cavity 110, for example, the part of the static magnetic core 200 extending into the magnetic core installation cavity 110 can be in interference fit with the magnetic core installation cavity 110, so that the static magnetic core 200 is reliably connected with the valve body 100, the static magnetic core 200 is prevented from being separated from the valve body 100, the static magnetic core 200 extends into the magnetic core installation cavity 110, the movable magnetic core 300 extends into the sleeve part 140, the movable magnetic core 300 and the sleeve part 140 can be in clearance fit, the distance between the static magnetic core 200 and the movable magnetic core 300 can be relatively short, and when the electromagnetic valve 1 is electrified, the electromagnetic force between the movable magnetic core 300 and the static magnetic core 200 is relatively strong, so that the movable magnetic core 300 can be driven to move.

In some embodiments of the present utility model, as shown in fig. 1-4, the area surrounded by the outer contour of the cross section of the sleeve portion 140 is smaller than the area surrounded by the outer contour of the cross section of the rest of the valve body 100, which is beneficial to reducing the volume of the sleeve portion 140, facilitating the processing and forming of the sleeve portion 140, and reducing the overall volume of the valve body 100, so that the overall volume of the solenoid valve 1 is smaller, the disassembly and assembly are more convenient, and the cost is low.

And, the cross section of the sleeve part 140 and the cross section of the rest of the valve body 100 are both perpendicular to the axial direction of the sleeve part 140, so that the core installation cavity 110 is conveniently constructed together with the rest of the sleeve part 140 and the valve body 100, so that the core installation cavity 110 can extend along the axial direction of the sleeve part 140, the movable magnetic core 300 can be conveniently installed, and the movable magnetic core 300 can move linearly in the core installation cavity 110 along the axial direction of the core installation cavity 110, so that the movable magnetic core 300 can move in the core installation cavity 110.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the solenoid valve 1 further includes an elastic member 400. Wherein the elastic member 400 may be a spring.

The elastic member 400 is located between the moving core 300 and the static magnetic core 200, and both ends of the elastic member 400 are respectively abutted against the moving core 300 and the static magnetic core 200.

Wherein, when the electromagnetic valve 1 is electrified, the movable magnetic core 300 controls the communication between the first channel 121 and the second channel 122 by utilizing electromagnetic force between the movable magnetic core and the static magnetic core 200; when the solenoid valve 1 is de-energized, the movable core 300 controls the communication between the first passage 121 and the second passage 122 to be blocked under the elastic force of the elastic member 400.

Thus, when the electromagnetic valve 1 is electrified, electromagnetic force is generated between the movable magnetic core 300 and the static magnetic core 200, the electromagnetic force is larger than the elastic force of the elastic piece 400, and the movable magnetic core 300 can be driven to move towards the direction close to the static magnetic core 200, so that the movable magnetic core 300 is separated from the sealing surface 130, and the communication between the first channel 121 and the second channel 122 is realized;

when the electromagnetic valve 1 is powered off, the electromagnetic force is stopped between the movable magnetic core 300 and the static magnetic core 200, and the elastic force of the elastic member 400 can push the movable magnetic core 300 to move away from the static magnetic core 200, so that the movable magnetic core 300 and the sealing surface 130 are attached and sealed, and the communication between the first channel 121 and the second channel 122 is disconnected.

In this way, when the electromagnetic valve 1 is electrified, the movable magnetic core 300 can move towards the direction close to the static magnetic core 200 so as to enable the first channel 121 to be communicated with the second channel 122, and only one elastic piece 400 is arranged, the movable magnetic core 300 can move towards the direction far away from the static magnetic core 200 so as to enable the first channel 121 to be disconnected from the second channel 122, the number of parts of the electromagnetic valve 1 is small, and the on-off switching of the first channel 121 and the second channel 122 is simpler and easy to realize.

In addition, as shown in fig. 1 and 2, a first fixing groove 320 may be formed at one end of the movable magnetic core 300 facing the static magnetic core 200, a second fixing groove 210 may be formed at one side of the static magnetic core 200 facing the movable magnetic core 300, and the first fixing groove 320 and the second fixing groove 210 are coaxially disposed after the movable magnetic core 300 and the static magnetic core 200 are assembled, so that one end of the elastic member 400 may extend into the first fixing groove 320 and the other end may extend into the second fixing groove 210, thereby ensuring the installation concentricity of the elastic member 400, and the elastic member 400 may more stably push the movable magnetic core 300 to be attached to the sealing surface 130, so that the resetting effect on the movable magnetic core 300 is better.

Other constructions and operations of the solenoid valve 1 according to the embodiment of the present utility model are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A solenoid valve, comprising:

the valve body is provided with a magnetic core installation cavity, a first channel and a second channel;

a static magnetic core fixed relative to the valve body;

and the movable magnetic core is arranged in the magnetic core mounting cavity, can move relative to the valve body by utilizing electromagnetic force between the movable magnetic core and the static magnetic core, and is used for opening the first channel and/or the second channel so as to enable the first channel to be communicated with the second channel or blocking the first channel and/or the second channel so as to enable the communication between the first channel and the second channel to be blocked.

2. The electromagnetic valve according to claim 1, wherein an outer peripheral surface of the moving core cooperates with an inner peripheral surface of the core mounting cavity to define the moving core to be movable in an axial direction of the core mounting cavity.

3. The solenoid valve of claim 1 wherein said valve body is configured with a sealing surface surrounding said first passage and facing said moving core, said first passage and said second passage communicating when said moving core is separated from said sealing surface, said first passage and said second passage communicating when said moving core is stopped against said sealing surface.

4. A solenoid valve according to claim 3 wherein said core mounting cavity and said first passage each extend in an axial direction of said valve body, and said second passage extends in a radial direction of said valve body, said second passage being located on a side of said first passage facing said moving core.

5. A solenoid valve according to claim 3 wherein an end of said moving core facing said first passage is provided with a weight-reducing slot having a cross-sectional area smaller than that of said first passage.

6. The solenoid valve of claim 5 wherein said weight-reducing slot has a first central axis along an axial direction of said first passage, said first central axis coinciding with a central axis of said first passage.

7. A solenoid valve according to claim 3 wherein the inner wall of said second passage on the side thereof adjacent said first passage is flush with said sealing surface.

8. A solenoid valve according to claim 3 wherein said second passage is a plurality of said second passages being circumferentially spaced apart along said first passage;

when the movable magnetic core is abutted with the sealing surface, the port of one end of each second channel facing the first channel is blocked.

9. The electromagnetic valve according to claim 1, wherein the valve body is configured with a sleeve portion protruding outward, the core mounting cavity penetrates the sleeve portion, the static magnetic core is mounted to an outer end of the sleeve portion, and the dynamic magnetic core is located on a side of the static magnetic core facing the first passage.

10. The solenoid valve of claim 9 wherein at least a portion of said static magnetic core is mounted within said core mounting cavity, said moving magnetic core extending into said sleeve portion.

11. The solenoid valve of claim 9 wherein the cross-sectional outer profile of the sleeve portion surrounds an area that is less than the cross-sectional outer profile of the remainder of the valve body, the cross-section of the sleeve portion and the remainder of the valve body each being a cross-section perpendicular to the axial direction of the sleeve portion.

12. The solenoid valve according to any one of claims 1-11, further comprising:

the elastic piece is positioned between the movable magnetic core and the static magnetic core, and two ends of the elastic piece are respectively abutted against the movable magnetic core and the static magnetic core;

when the electromagnetic valve is electrified, the movable magnetic core controls the communication between the first channel and the second channel by utilizing electromagnetic force between the movable magnetic core and the static magnetic core;

when the electromagnetic valve is powered off, the movable magnetic core controls the communication between the first channel and the second channel to be blocked under the elasticity of the elastic piece.

Images