CN219176950U - Electromagnetic valve - Google Patents

Abstract

The utility model discloses a solenoid valve, comprising: valve body, disk seat, case subassembly and case. The valve body has an inlet. The valve seat is fixedly connected with the valve body to form a valve cavity, and the valve seat is provided with an outlet. The magnetic core subassembly is located the one end of keeping away from the disk seat of valve body. The valve core is positioned in the valve cavity. The valve core can move between a communication position and a separation position under the action of the magnetic core assembly and the first elastic piece, when the valve core is positioned at the communication position, the valve core is separated from the outlet so that the valve cavity is communicated with the outlet, and when the valve core is positioned at the separation position, the valve core seals the outlet so as to separate the communication of the valve cavity and the outlet. According to the electromagnetic valve, the valve core can move between the communicating position and the blocking position under the action of the magnetic core component and the first elastic piece, so that the structure of electromagnetic valve parts is simplified, the production cost of the electromagnetic valve is reduced, the assembly is simpler, and meanwhile, the control logic of the electromagnetic valve is simple.

Description

Electromagnetic valve

Technical Field

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

Background

In the related art, the control of the fluid in the vehicle is generally controlled by the on-off control of the electromagnetic valve, such as a control switch of the refrigerant flow of the air conditioning system, however, the electromagnetic valve in the prior art has a relatively complex structure, the control logic is not brief enough, and the electromagnetic valve has more parts due to the complex structure, so that the assembly is complex, the assembly cost is high, and the reliability is low.

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 simplifies the structure of solenoid valve parts, reduces the production cost of the solenoid valve, and is simpler in assembly, and the control logic of the solenoid valve is simple. According to an embodiment of the present utility model, a solenoid valve includes: a valve body having an inlet; the valve seat is fixedly connected with the valve body to form a valve cavity, and the valve seat is provided with an outlet; the magnetic core assembly is arranged at one end of the valve body, which is far away from the valve seat; the valve core is positioned in the valve cavity; the first elastic piece 2 is arranged between the valve body and the valve core, the valve core can move between a communicating position and a blocking position under the action of the magnetic core assembly and the first elastic piece, when the valve core is positioned at the communicating position, the valve core is separated from the outlet so that the valve cavity is communicated with the outlet, and when the valve core is positioned at the blocking position, the valve core blocks the outlet so as to block the communication between the valve cavity and the outlet.

According to the electromagnetic valve disclosed by the embodiment of the utility model, the valve body, the valve seat, the magnetic core assembly, the valve core and the first elastic piece are arranged, and the valve core can move between the communicating position and the blocking position under the action of the magnetic core assembly and the first elastic piece. Therefore, compared with the traditional electromagnetic valve, the electromagnetic valve has the advantages that the structure of electromagnetic valve parts is simplified, the design of the valve seat is more flexible, the assembly is convenient, the production cost of the electromagnetic valve is reduced, the electromagnetic valve is simpler during assembly, and meanwhile, the control logic of the electromagnetic valve is simple.

According to some embodiments of the utility model, the valve seat has a notch formed therein, the valve body being opposite the notch to define the inlet.

According to some embodiments of the utility model, the valve seat comprises: the valve seat body is provided with the outlet; and the mounting part is arranged on the periphery of the valve seat body, and the notch is formed on the mounting part.

According to some embodiments of the utility model, the mounting portion includes a first abutment section and a second abutment section connected to each other, the second abutment section being located on a side of the first abutment section adjacent to the valve seat body and protruding from the second abutment section in an axial direction of the valve seat, the first abutment section and the second abutment section each abutting the valve body to define the inlet.

According to some embodiments of the utility model, the plurality of notches are arranged at intervals along the circumference of the mounting part.

According to some embodiments of the utility model, an end of the valve seat body remote from the valve core is formed with a mating groove extending in a circumferential direction of the valve seat body, and a seal is located in the mating groove.

According to some embodiments of the utility model, at least a portion of an inner wall surface of a side of the outlet adjacent to the valve spool is beveled, the beveled being sloped in a direction away from a central axis of the valve seat.

According to some embodiments of the utility model, an end face of the valve core adjacent to one end of the valve seat is a cambered surface, and when the valve core is located at the separation position, the cambered surface is in contact with the inclined surface.

According to some embodiments of the utility model, the magnetic core assembly comprises: the first sleeve is fixed at one end of the valve body far away from the valve core; the first movable iron core is at least partially arranged in the first sleeve, and can move relative to the valve body in the first sleeve; the first static iron core is fixed relative to the first sleeve and is positioned on one side of the first movable iron core, which is far away from the valve core; the second elastic piece is arranged between the first static iron core and the first movable iron core.

According to some embodiments of the utility model, the valve spool is always maintained in the shut off position; in the process that the valve core moves from the separation position to the communication position, the first movable iron core moves towards a direction away from the outlet under the action of magnetic force of the first movable iron core, and the valve core moves towards a direction away from the outlet under the action of the first elastic piece so as to enable the outlet to be communicated with the valve cavity, in the process that the valve core resets from the communication position to the separation position, the first movable iron core is separated from the first movable iron core under the action of elastic force of the second elastic piece, and the first movable iron core pushes the valve core to move towards the direction of the outlet so as to separate the communication between the outlet and the valve cavity.

According to some embodiments of the utility model, when the valve core is located at the blocking position, the second elastic piece acts on the valve core through the first movable iron core to enable the valve core to block the outlet so as to enable the valve core to be always kept at the blocking position; when the valve core is positioned at the communication position, the valve core is separated from the outlet under the action of the first elastic piece so as to enable the valve cavity to be communicated with the outlet.

According to some embodiments of the utility model, the magnetic core assembly comprises: the second sleeve is fixedly connected with the valve cover, the second movable iron core is positioned in the second sleeve, and the third elastic piece is positioned in the second sleeve, and the second movable iron core can move relative to the valve body in the second sleeve; a push rod is arranged between the second movable iron core and the valve core, and the third elastic piece is sleeved on the push rod and is positioned between the second movable iron core and the valve body; the valve body is a magnetic piece and is configured as a second static iron core.

According to some embodiments of the utility model, the valve spool is always maintained in the communication position; in the process that the valve core moves from the communication position to the separation position, the second movable iron core drives the push rod to move under the action of magnetic force of the second static iron core, and the push rod pushes the valve core to move towards the direction of the outlet so as to seal the outlet to separate the communication between the outlet and the valve cavity; when the valve core is reset to the communication position from the separation position, the third elastic piece provides elastic force to enable the second movable iron core to be separated from the second static iron core, and the first elastic piece provides elastic force to enable the valve core to be separated from the outlet.

According to some embodiments of the utility model, when the valve spool is in the communication position, the valve spool is separated from the outlet by the first elastic member to allow communication between the valve chamber and the outlet; when the valve core is positioned at the partition position, the second movable iron core acts on the valve core under the action of magnetic force of the second movable iron core and the second static iron core, so that the valve core seals the outlet.

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 schematic illustration 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 utility model;

FIG. 3 is a schematic illustration of a solenoid valve according to another embodiment of the utility model;

fig. 4 is a schematic view of a valve seat of a solenoid valve according to an embodiment of the utility model.

Reference numerals:

a solenoid valve 100;

a valve body 1; a valve chamber 11; a valve seat 2; a valve seat body 21; an outlet 211; a mating groove 212; a seal 2121;

a mounting portion 22; notch 221; a first stop segment 222; a second stop section 223; a magnetic core assembly 3; a first sleeve 31;

a first plunger 32; a first stationary core 33; a second elastic member 34; a second sleeve 35; a second plunger 36;

a third elastic member 37; a push rod 38; a valve core 4; a first elastic member 5; a pressure release member 6; a pressure relief vent 61.

Detailed Description

Embodiments of the present utility model are described in detail below, with reference to the accompanying drawings, which are exemplary, and solenoid valve 100 according to an embodiment of the present utility model is described below with reference to fig. 1-4.

As shown in fig. 1 to 4, a solenoid valve 100 according to an embodiment of the present utility model includes a valve body 1, a valve seat 2, a core assembly 3, and a valve spool 4.

Specifically, the valve body 1 has an inlet. The valve seat 2 is fixedly connected with the valve body 1 to form a valve cavity 11, and the valve seat 2 is provided with an outlet 211. The magnetic core assembly 3 is arranged at one end of the valve body 1 far away from the valve seat 2. The valve spool 4 is located in the valve chamber 11. The first elastic member 5 is disposed between the valve body 1 and the valve core 4, the valve core 4 is movable between a communication position and a blocking position under the action of the magnetic core assembly 3 and the first elastic member 5, when the valve core 4 is located at the communication position, the valve core 4 is separated from the outlet 211 to communicate the valve cavity 11 with the outlet 211, and when the valve core 4 is located at the blocking position, the valve core 4 blocks the outlet 211 to block communication between the valve cavity 11 and the outlet 211.

For example, in the example of fig. 1 and 2, the valve body 1 is an integral piece, the outlet 211 of the valve seat 2 extends axially through the valve seat 2, and the valve body 1 is fixedly connected to the valve seat 2 so as to communicate the inlet and the outlet 211 while together defining the valve chamber 11. One end of the first elastic piece 5 is sleeved at one end of the valve core 2, and the other end of the first elastic piece 5 is in contact with the valve body 1 or the valve seat 2. During installation, the first elastic piece 5 is sleeved on the valve core 2, the valve core 2 with the first elastic piece 5 is abutted on the valve seat 2, and then the valve body 1 is installed on the valve seat 5, so that the valve seat 2 is more flexible in design and convenient to assemble.

When the valve element 4 moves upward, the first elastic member 5 provides a restoring force to separate the valve element 4 from the outlet 211, at which time the valve element 4 is switched from the blocking position to the communicating position, and the valve chamber 11 communicates with the outlet 211. When the valve element 4 moves downward, the first elastic member 5 is compressed, at this time, the valve element 4 is switched from the communication position to the blocking position, the valve element 4 contacts the outlet 211, and the free end of the valve element 4 blocks the outlet 211 to block the communication of the valve chamber 11 and the outlet 211.

According to the solenoid valve 100 of the embodiment of the utility model, by providing the valve body 1, the valve seat 2, the core assembly 3, the valve spool 4, and the first elastic member 37, the valve spool 4 is movable between the communication position and the blocking position by the core assembly 3 and the first elastic member 37. Therefore, compared with the traditional electromagnetic valve 100, the structure of the electromagnetic valve 100 parts is simplified, the design of the valve seat 2 is more flexible, the assembly is convenient, the production cost of the electromagnetic valve 100 is reduced, and meanwhile, the control logic of the electromagnetic valve 100 is simple.

According to some embodiments of the present utility model, the valve seat 2 is formed with a notch 221, and the valve body 1 is opposite to the notch 221 to define an inlet. Referring to fig. 1 and 4, a notch 221 is formed in one side of the outer peripheral wall of the valve seat 2 adjacent to the valve body 4, and the notch 221 communicates with an end face of the valve seat 2 adjacent to the valve body 4. After the valve body 1 is fixedly connected with the valve seat 2, the end face of the valve body 1 is opposite to the open side of the notch 221, so that an inlet is defined jointly by the connection of the valve body 1 and the valve seat 2. The inlet may be used to allow fluid to flow into the valve chamber 11 and then out of the outlet 211. Thus, the valve element 4 is switched between the blocking position and the communication position, whereby the flow rate of the fluid can be controlled.

Further, as shown in fig. 4, the valve seat 2 includes a valve seat body 21 and a mounting portion 22. The valve seat body 21 has an outlet 211 formed therein. The mounting portion 22 is provided on the outer periphery of the valve seat body 21, and a notch 221 is formed in the mounting portion 22. The mounting portion 22 is located substantially in the middle of the valve seat body 21, and the mounting portion 22 extends vertically upward toward the valve element 4. A notch 221 is formed on the outer side wall of the mounting portion 22, and the mounting portion 22 is fixedly connected with the valve body 1 to mount the valve seat 2 to the valve body. Thus, the valve seat 2 has a simple structure, is convenient to process, and can improve the production efficiency of the electromagnetic valve 100.

Still further, the mounting portion 22 includes a first abutting section 222 and a second abutting section 223 connected to each other, the second abutting section 223 is located on a side of the first abutting section 222 adjacent to the valve seat body 21, and the first abutting section 222 protrudes from the second abutting section 223 in the axial direction of the valve seat 2, and the first abutting section 222 and the second abutting section 223 each abut against the valve body 1 to define an inlet. As shown in fig. 4, the shape of the end of the mounting portion 22 adjacent to the valve element 4 is substantially L-shaped, and the shape of the end of the valve body 1 adjacent to the valve seat 2 is inverted L-shaped, and when the valve body 1 is mounted, the end face of the valve body 1 can abut against the end faces of the first abutting section 222 and the second abutting section 223, and the side wall of the valve body 1 can abut against the side wall of the first abutting section 222, and at this time, the mounting portion 22 is located on the outer periphery of the valve body 1. Therefore, the tightness of the joint of the valve seat 2 and the valve body 1 can be effectively ensured, the leakage of the liquid of the electromagnetic valve 100 from the joint is avoided, and meanwhile, the first abutting section 222 and the second abutting section 223 can play a limiting role, so that the valve body 1 is prevented from moving along the direction towards the valve seat 2.

In some alternative embodiments, the number of notches 221 may be plural, and in the description of the present utility model, "plural" means two or more. The plurality of notches 221 are provided at intervals along the circumferential direction of the mounting portion 22. For example, in the example of fig. 4, the notches 221 may be four, and the four notches 221 may be provided at uniform intervals along the circumferential direction of the mounting portion 22. Therefore, the plurality of notches 221 can enable the valve seat 2 and the valve body 1 to be fixedly connected to define a plurality of inlets, so that the flow rate of fluid entering the valve cavity 11 is increased, and the working efficiency of the electromagnetic valve 100 can be more efficient.

According to some embodiments of the present utility model, the valve seat body 21 is formed at an end thereof remote from the valve core 4 with a fitting groove 212, the fitting groove 212 extending in a circumferential direction of the valve seat body 21, and the seal 2121 being located within the fitting groove 212. Referring to fig. 1 and 2, a portion of an outer side wall of the valve seat body 21 on a side away from the valve body 1 is recessed toward the center of the valve seat body 21 to form a fitting groove 212, and a seal 2121 is provided in the fitting groove 212. When the solenoid valve 100 is coupled to other components, the seal 2121 may improve the tightness of the coupling of the solenoid valve 100 to the other components, avoiding fluid leakage. Alternatively, the seal 2121 may be a ring-shaped object fitted in the fitting groove 212, or the seal 2121 may be a tubular object surrounding the fitting groove 212.

According to some embodiments of the present utility model, at least a part of the inner wall surface of the side of the outlet 211 adjacent to the valve element 4 is a slope, the slope being inclined in a direction away from the central axis of the valve seat 2. For example, in the example of fig. 2, the inner wall surface of the outlet 211 contacting the valve core 4 is an inclined surface, when the valve core 4 is located at the blocking position, the contact area between the outlet 211 and the valve core 4 can be increased, so that the outer peripheral surface of the valve core 4 is more attached to the outlet 211, and the outlet 211 is effectively blocked from the valve cavity 11.

Further, the end face of the valve core 4 adjacent to one end of the valve seat 2 is an arc surface, and when the valve core 4 is located at the isolating position, the arc surface is in contact with the inclined surface. As shown in fig. 3, the outer peripheral surface of the valve core 4, which is in contact with the outlet 211 of the valve seat 2, is an arc surface, when the arc surface of the valve core 4 is in contact with the inclined surface of the outlet 211 of the valve seat 2, friction between the valve core 4 and the outlet 211 can be reduced while the valve core 4 is located at a separation position to separate the outlet 211 from the valve cavity 11, so that the service life of the electromagnetic valve 100 is prolonged.

According to some embodiments of the present utility model, as shown in fig. 1 and 2, the magnetic core assembly 3 includes a first sleeve 31, a first moving core 32, a first stationary core 33, and a second elastic member 34. The first sleeve 31 is fixed to an end of the valve body 1 remote from the valve spool 4. At least part of the first plunger 32 is provided in the first sleeve 31, and the first plunger 32 is movable within the first sleeve 31 with respect to the valve body 1. The first stationary core 33 is fixed with respect to the first sleeve 31 and is located on a side of the first movable core 32 remote from the spool 4. The second elastic member 34 is provided between the first stationary core 33 and the first movable core 32.

For example, a part of the upper surface of the valve body 1 extends upwards to form a first sleeve 31, and a mounting cavity of the first sleeve 31 is communicated with the valve cavity 11, the first movable iron core 32 is slidably arranged in the mounting cavity of the first sleeve 31 and is connected with the valve core 4, a pressure release piece 6 is arranged between the valve core 4 and the first movable iron core 32, at least one pressure release hole 61 is formed in the pressure release piece 6, the pressure release piece 6 can balance the air pressure in the valve cavity 11, the flowing sound of fluid in the valve cavity 11 is reduced, and the use experience of a user is improved.

The first static iron core 33 is located at the upper end of the first sleeve 31, the first static iron core 33 may include a first iron core segment and a second iron core segment that are connected with each other, the first iron core segment stretches into the installation cavity of the first sleeve 31, and the first iron core segment has a first matching cavity, and the end face of the second iron core segment abuts against the end face of the first sleeve 31, so that the first static iron core 33 is fixedly connected with the first sleeve 31, and the first static iron core 33 is prevented from moving towards the direction of the first movable iron core 32. The second elastic member 34 is located in the first sleeve 31, one end of the second elastic member 34 is located in the first matching cavity of the first static iron core 33, and the other end of the second elastic member 34 is located in the second matching cavity of the first movable iron core 32. When the first movable core 32 moves up and down, the second elastic member 34 is also deformed by force.

According to some embodiments of the present utility model, as shown in fig. 1, the valve spool 4 is always maintained at the blocking position, the first movable core 32 is moved away from the outlet 211 by the magnetic force with the first stationary core 33 during the movement of the valve spool 4 from the blocking position to the communication position, and the valve spool 4 is moved away from the outlet 211 by the first elastic member 5 to communicate the outlet 211 with the valve chamber 11. In the process of resetting the valve core 4 from the communication position to the blocking position, the first movable iron core 32 is separated from the first static iron core 33 under the elastic force of the second elastic member 34, and the first movable iron core 32 pushes the valve core 4 to move toward the direction of the outlet 211 so as to block the communication between the outlet 211 and the valve cavity 11.

Specifically, when the valve spool 4 is in the blocking position, the valve spool 4 is in contact with the outlet port 211, so that communication of the outlet port 211 with the valve chamber 11 is blocked. When the first movable core 32 moves upward, the pressure of the first elastic member 5 applied to the valve core 4 decreases, the first elastic member 5 applies an upward restoring force to the valve core 4 and pushes the valve core 4 to move upward, and the distance between the first movable core 32 and the first stationary core 33 gradually decreases during the movement, so that the magnetic attraction force of the first movable core 32 applied to the first stationary core 33 increases, and the first movable core 32 compresses the second elastic member 34 during the movement. When the valve element 4 moves from the communication position to the blocking position, the restoring force of the second elastic member 34 pushes the first movable iron core 32 to move downward, thereby driving the valve element 4 to move downward, and the valve element 4 applies a downward force to the first elastic member 5 until the valve element 4 contacts the outlet 211.

According to some embodiments of the present utility model, when the spool 4 is in the off position, the second resilient member 34 acts on the spool 4 through the first plunger 32 to cause the spool 4 to block the outlet 211 to normally maintain the spool 4 in the off position. When the spool 4 is in the communication position, the spool 4 is separated from the outlet port 211 by the first elastic member 5 to allow communication between the valve chamber 11 and the outlet port 211. Thus, the control logic of the solenoid valve 100 is simple, facilitating the opening and closing of the outlet 211.

According to other embodiments of the utility model, the magnetic core assembly 3 comprises a second sleeve 35 fixedly connected with the valve cover, a second movable core 36 positioned in the second sleeve 35 and a third elastic member 37, the second movable core 36 being movable in the second sleeve 35 relative to the valve body 1. A push rod 38 is arranged between the second movable iron core 36 and the valve core 4, and a third elastic piece 37 is sleeved on the push rod 38 and is positioned between the second movable iron core 36 and the valve body 1. The valve body 1 is a magnetic member and is configured as a second stationary core. For example, in the example of fig. 3, the third elastic member 37 is located at the lower end of the second movable iron core 36, and the third elastic member 37 is sleeved on the push rod 38, and the lower end of the third elastic member 37 abuts against the valve body 1, the upper end of the third elastic member 37 abuts against the push rod 38, and the end of the push rod away from the second movable iron core 36 is connected with the valve core 4. Because the valve body 1 is a magnetic element, when the valve core 4 moves from the blocking position to the communicating position, the push rod 38 drives the valve core 4 to move upwards, so that the valve core 4 is separated from the outlet 211 of the valve seat 2, and the outlet 211 is communicated with the valve cavity 11.

Further, the spool 4 is always kept in the communication position. In the process of moving the valve core 4 from the communication position to the blocking position, the second movable iron core 36 drives the push rod 38 to move under the action of magnetic force with the second static iron core, and the push rod 38 pushes the valve core 4 to move towards the direction of the outlet 211 so as to block the outlet 211 and block the communication between the outlet 211 and the valve cavity 11. When the valve element 4 is reset from the blocking position to the communicating position, the third elastic member 37 provides an elastic force to separate the second movable core 36 from the second stationary core, and the first elastic member 5 provides an elastic force to separate the valve element 4 from the outlet 211. Thus, the control logic of the solenoid valve 100 can be simplified, facilitating the opening and closing of the outlet 211.

According to some embodiments of the present utility model, when the valve spool 4 is located at the communication position, the valve spool 4 is separated from the outlet port 211 by the first elastic member 5 to allow communication between the valve chamber 11 and the outlet port 211. When the valve core 4 is at the blocking position, the second movable iron core 36 acts on the valve core 4 under the action of magnetic force with the second static iron core, so that the valve core 4 blocks the outlet 211. At this time, when the electromagnetic valve 100 is not energized, there is a magnetic attraction force between the second movable iron core 36 and the second stationary iron core, so that the valve core 4 and the valve seat 2 are in a separated state, and the valve cavity 11 is communicated with the outlet 211; when the solenoid valve 100 is energized, the magnetic attraction between the second movable core 36 and the second stationary core is lost, and the valve element 4 closes the outlet 211.

Other constructions and operations of the solenoid valve 100 according to embodiments of the utility model are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "inner", "outer", "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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

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 (14)

1. A solenoid valve, comprising:

a valve body having an inlet;

the valve seat is fixedly connected with the valve body to form a valve cavity, and the valve seat is provided with an outlet;

the magnetic core assembly is arranged at one end of the valve body, which is far away from the valve seat;

the valve core is positioned in the valve cavity;

the valve body is provided with a valve core, the valve core is arranged between the valve body and the valve core, the valve core can move between a communicating position and a blocking position under the action of the magnetic core assembly and the first elastic piece, when the valve core is positioned at the communicating position, the valve core is separated from the outlet so that the valve cavity is communicated with the outlet, and when the valve core is positioned at the blocking position, the valve core blocks the outlet so as to block the communication between the valve cavity and the outlet.

2. The solenoid valve of claim 1 wherein said valve seat has a notch formed therein, said valve body opposing said notch to define said inlet.

3. The solenoid valve of claim 2 wherein said valve seat comprises:

the valve seat body is provided with the outlet;

and the mounting part is arranged on the periphery of the valve seat body, and the notch is formed on the mounting part.

4. A solenoid valve according to claim 3 wherein said mounting portion includes first and second abutment sections connected to one another, said second abutment section being located on a side of said first abutment section adjacent said valve seat body and projecting from said second abutment section in an axial direction of said valve seat, said first and second abutment sections each abutting said valve body to define said inlet.

5. A solenoid valve according to claim 3 wherein said notches are a plurality of said notches being spaced apart along the circumference of said mounting portion.

6. A solenoid valve according to claim 3 wherein an end of said valve seat body remote from said spool is formed with a mating groove extending circumferentially of said valve seat body, a seal being located in said mating groove.

7. The solenoid valve of claim 1 wherein at least a portion of an inner wall surface of a side of the outlet adjacent the spool is beveled, the beveled being sloped in a direction away from a central axis of the valve seat.

8. The solenoid valve of claim 7 wherein an end face of said spool adjacent said valve seat is a cambered surface, said cambered surface contacting said inclined surface when said spool is in said blocking position.

9. The solenoid valve of claim 1 wherein said magnetic core assembly comprises:

the first sleeve is fixed at one end of the valve body far away from the valve core;

the first movable iron core is at least partially arranged in the first sleeve, and can move relative to the valve body in the first sleeve;

the first static iron core is fixed relative to the first sleeve and is positioned on one side of the first movable iron core, which is far away from the valve core;

the second elastic piece is arranged between the first static iron core and the first movable iron core.

10. The solenoid valve of claim 9 wherein said spool is normally held in said off position;

in the process that the valve core moves from the separation position to the communication position, the first movable iron core moves towards a direction away from the outlet under the action of magnetic force of the first movable iron core, and the valve core moves towards a direction away from the outlet under the action of the first elastic piece so as to enable the outlet to be communicated with the valve cavity, in the process that the valve core resets from the communication position to the separation position, the first movable iron core is separated from the first movable iron core under the action of elastic force of the second elastic piece, and the first movable iron core pushes the valve core to move towards the direction of the outlet so as to separate the communication between the outlet and the valve cavity.

11. The solenoid valve of claim 10 wherein said second spring acts on said spool through said first plunger to block said outlet port to normally hold said spool in said off position when said spool is in said off position;

when the valve core is positioned at the communication position, the valve core is separated from the outlet under the action of the first elastic piece so as to enable the valve cavity to be communicated with the outlet.

12. The solenoid valve of claim 1 wherein said magnetic core assembly comprises: the second sleeve is fixedly connected with the valve body, the second movable iron core is positioned in the second sleeve, and the third elastic piece is positioned in the second sleeve, and the second movable iron core can move relative to the valve body in the second sleeve;

a push rod is arranged between the second movable iron core and the valve core, and the third elastic piece is sleeved on the push rod and is positioned between the second movable iron core and the valve body; the valve body is a magnetic piece and is configured as a second static iron core.

13. The solenoid valve of claim 12 wherein said spool is normally held in said communication position;

in the process that the valve core moves from the communication position to the separation position, the second movable iron core drives the push rod to move under the action of magnetic force of the second static iron core, and the push rod pushes the valve core to move towards the direction of the outlet so as to seal the outlet to separate the communication between the outlet and the valve cavity;

when the valve core is reset to the communication position from the separation position, the third elastic piece provides elastic force to enable the second movable iron core to be separated from the second static iron core, and the first elastic piece provides elastic force to enable the valve core to be separated from the outlet.

14. The solenoid valve of claim 13 wherein said second plunger acts on said valve spool under magnetic force with said second stationary plunger when said valve spool is in said blocking position to cause said valve spool to block said outlet port.

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