CN216742923U

CN216742923U - Reversible solenoid valve

Info

Publication number: CN216742923U
Application number: CN202123220479.4U
Authority: CN
Inventors: 熊匀均; 宣利华; 陈华峰; 杨剑
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-06-14
Anticipated expiration: 2031-12-20

Abstract

The utility model relates to the technical field of valves, especially, relate to a reversible solenoid valve. The reversible electromagnetic valve comprises a valve body assembly and a valve core assembly, wherein the valve core assembly can slide in a valve cavity to enable a first communicating port and a second communicating port to be communicated or separated; the valve core assembly comprises a sliding block capable of blocking the first communicating port and the second communicating port, the sliding block comprises a sealing seat, a first sealing block and a second sealing block, the first sealing block and the second sealing block are respectively arranged at two ends, close to the first communicating port and the second communicating port, of the sealing seat, and the strength of the sealing seat is greater than that of the first sealing block and that of the second sealing block. Compared with the prior art, the utility model has the advantages of: the material strength of the sealing seat is larger than that of the first sealing block and that of the second sealing block, so that the sliding block is prevented from deforming under the condition of high temperature and high pressure in the valve cavity on the premise of ensuring the sealing performance of the sliding block, and the sliding block is prevented from being blocked due to deformation in the valve cavity to cause internal leakage.

Description

Reversible solenoid valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a reversible solenoid valve.

Background

The reversible electromagnetic valve is installed in the air conditioning unit and comprises a valve body, a piston unit and a sliding block, a valve cavity is formed in the valve body, a first communicating opening and a second communicating opening which are communicated with the valve cavity are formed in the valve body, and the piston unit can drive the sliding block to slide in the valve cavity so that the first communicating opening and the second communicating opening are communicated or separated, so that the two-way circulation of a refrigerant in the reversible electromagnetic valve is realized.

In the existing reversible electromagnetic valve, the sliding block is easy to deform under high temperature and high pressure, thereby causing faults of poor internal leakage, dead action and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above, in order to solve the above technical problems, an embodiment of the present invention provides a reversible solenoid valve.

The utility model discloses for solving above-mentioned technical problem in the embodiment, provide following technical scheme:

a reversible electromagnetic valve comprises a valve body assembly and a valve core assembly, wherein a first communicating port and a second communicating port are respectively formed in two sides of the valve body assembly, the valve body assembly is provided with a valve cavity, the valve core assembly is arranged in the valve cavity, and the valve core assembly can slide in the valve cavity to enable the first communicating port and the second communicating port to be communicated or separated; the valve element assembly comprises a sliding block capable of plugging the first communicating port and the second communicating port, the sliding block comprises a sealing seat, a first sealing block and a second sealing block, the first sealing block and the second sealing block are respectively arranged at two ends, close to the first communicating port and the second communicating port, of the sealing seat, the first sealing block and the second sealing block can respectively abut against the end faces, at the first communicating port and the second communicating port, of the sealing seat, and the strength of the sealing seat is greater than that of the first sealing block and that of the second sealing block.

It can be understood that, in the present application, the strength of the seal seat is greater than the strength of the first seal block and the second seal block, so as to avoid the slider from deforming under the condition of high temperature and high pressure in the valve cavity under the premise of ensuring the sealing performance of the slider, resulting in the slider being stuck in the valve cavity due to deformation, thereby causing internal leakage.

In one embodiment, the seal housing has a hardness greater than the hardness of the first seal block and the second seal block.

It will be appreciated that by making the hardness of the sealing seat greater than the hardness of the first and second sealing blocks, this ensures the sealing performance of the first and second sealing blocks.

In one embodiment, the first sealing block has a first opening, the first opening penetrates through the other end of the first sealing block from one end of the first sealing block, the second sealing block has a second opening, the second opening penetrates through the other end of the second sealing block from one end of the second sealing block, and two ends of the sealing seat respectively extend into the first opening and the second opening.

It can be understood that, by respectively extending two ends of the sealing seat into the first opening and the second opening, the refrigerant can pass through the sealing seat with a higher impact strength of the first opening or the second opening, so as to reduce the impact on the first sealing block and the second sealing block with a lower strength, and further protect the slider from deformation.

In one embodiment, the sealing seat includes a first sealing seat and a second sealing seat, the first sealing seat is located on a side close to the first communication port relative to the second sealing seat, the first sealing block is sleeved on an outer circumferential side of the first sealing seat, the second sealing block is sleeved on an outer circumferential side of the second sealing seat, and the first sealing seat and the second sealing seat are opposite and separately arranged.

It can be understood that the first seal seat and the second seal seat are arranged oppositely and separately, so that the sealing performance of the slider on the first communication port and the second communication port is enhanced.

In one embodiment, the first sealing seat and the second sealing seat are stainless steel seats, and the first sealing block and the second sealing block are plastic blocks or nylon blocks.

In one embodiment, the coefficient of friction of the first and second seal blocks is less than the coefficient of friction of the seal housing.

It can be understood that the sliding block is prevented from being clamped between the first communication port and the second communication port by making the friction coefficient of the first sealing block and the second sealing block smaller than the friction coefficient of the sealing seat, so that the valve is opened conveniently.

In one embodiment, the first seal seat and the first seal block are integrally formed by injection molding, and/or the second seal seat and the second seal block are integrally formed by injection molding.

It can be understood that, by integrally molding the first seal seat and the first seal block through injection molding, and/or integrally molding the second seal seat and the second seal block through injection molding, leakage at a connection gap between the first seal seat and the first seal block and at a connection gap between the second seal seat and the second seal block is avoided, and thus internal leakage is prevented.

In one embodiment, the first seal seat and the second seal seat are integrally formed.

In one embodiment, the first seal seat defines a first seal groove, and the first seal block is mounted in the first seal groove; the second seal seat is provided with a second seal groove, and the second seal block is arranged in the second seal groove.

It can be understood that, by respectively opening the first seal groove and the second seal groove in the circumferential direction of the first seal seat and the second seal seat, the first seal block and the second seal block are prevented from falling off from the first seal seat and the second seal seat and failing to cause leakage.

In one embodiment, a first stopping portion and a second stopping portion are respectively disposed on groove walls of the first sealing groove and the second sealing groove, and the first stopping portion and the second stopping portion respectively abut against the first sealing block and the second sealing block to stop the first sealing block and the second sealing block.

It can be understood that, by providing the first stopping portion and the second stopping portion on the groove walls of the first sealing groove and the second sealing groove, respectively, the first sealing block and the second sealing block are stopped, and the first sealing block and the second sealing block are prevented from falling off from the first sealing seat and the second sealing seat and failing to cause leakage.

In one embodiment, the first sealing seat and the second sealing seat are separately arranged, the first sealing seat includes a first guide sleeve and a first pressing plate, the first pressing plate is provided with a first connection hole, the first guide sleeve extends into the first connection hole and is fixedly connected with the first pressing plate, and the first sealing block is connected to one end of the first pressing plate, which is far away from the first guide sleeve; the second sealing seat comprises a second guide sleeve and a second pressing plate, a second connecting hole is formed in the second pressing plate, the second guide sleeve extends into the second connecting hole and is fixedly connected with the second pressing plate, and the second sealing block is connected to one end, far away from the second guide sleeve, of the second pressing plate.

In one embodiment, a first mounting groove is formed in one end, away from the first pressing plate, of the first sealing block, a first stop plate is mounted in the first mounting groove, and the first stop plate is fixedly connected to one end, close to the first sealing block, of the first guide sleeve; the second sealing block is far away from one end of the second pressing plate, a second mounting groove is formed in the end, close to the second sealing block, of the second pressing plate, a second stop plate is mounted in the second mounting groove, and the second stop plate is fixedly connected to one end, close to the second sealing block, of the second guide sleeve.

It can be understood that, by installing the first stop plate and the second stop plate fixedly connected with the first guide sleeve and the second guide sleeve in the first installation groove and the second installation groove, good installation strength between the components is achieved, and falling failure is avoided.

Compared with the prior art, the utility model discloses a reversible solenoid valve that provides in the embodiment, through making the slider is close to first intercommunication mouth with the material intensity at the both ends of second intercommunication mouth is greater than except being close to first intercommunication mouth with the material intensity at other positions beyond the both ends of second intercommunication mouth, thereby is guaranteeing avoid under the prerequisite of slider sealing performance the slider is in produce under the highly compressed condition of high temperature in the valve chamber and warp, lead to the slider is in because of warping in the valve chamber and blocking, arouse the internal leakage.

Drawings

Fig. 1 is a schematic structural view of a reversible solenoid valve provided by the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a slider according to the present invention;

fig. 3 is a schematic structural diagram of an embodiment of a seal seat according to the present invention;

fig. 4 is a schematic structural view of another embodiment of the sealing seat provided by the present invention;

fig. 5 is a schematic structural diagram of another embodiment of the slider according to the present invention.

The symbols in the drawings represent the following meanings:

100. a reversible solenoid valve; 10. a valve body assembly; 11. a valve body; 111. a first communication port; 1111. a first connecting pipe; 112. a second communication port; 1121. a second connecting pipe; 113. a valve cavity; 1131. a first chamber; 1132. a second chamber; 1133. a third chamber; 114. a first hole; 115. a second hole; 12. a first end cap; 13. a second end cap; 14. a middle end cap; 15. a valve seat; 20. a valve core assembly; 21. a slider; 211. a sealing seat; 2111. a first seal seat; 2111a, a first seal groove; 2111b, a first stop; 2112. a second seal seat; 2112a, a second seal groove; 2112b, a second stop; 212. a first seal block; 2121. a first mounting groove; 213. a second seal block; 2131. a second mounting groove; 214. an inner cavity; 215. an elastic member; 22. a connecting rod; 23. a piston unit; 24. a guide frame; 30. a first guide sleeve; 40. a first platen; 41. a first connection hole; 50. a second guide sleeve; 60. a second platen; 61. a second connection hole; 70. a first stopper plate; 80. a second stopper plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the present invention provides a reversible solenoid valve 100. The reversible solenoid valve 100 is installed in an air conditioning unit and used for controlling the communication or the partition of a pipeline, thereby realizing the bidirectional circulation of a refrigerant.

In the existing reversible electromagnetic valve, a sliding block is easy to deform under high temperature and high pressure, so that faults such as poor internal leakage, dead action and the like are caused.

In order to solve the problems existing in the conventional reversible solenoid valve, the utility model provides a reversible solenoid valve 100, which comprises a valve body assembly 10 and a valve core assembly 20, wherein a first communicating port 111 and a second communicating port 112 are respectively arranged on two sides of the valve body assembly 10, the valve body assembly 10 is provided with a valve cavity 113, the valve core assembly 20 is arranged in the valve cavity 113, and the valve core assembly 20 can slide in the valve cavity 113 to enable the first communicating port 111 and the second communicating port 112 to be communicated or separated; the valve core assembly 20 comprises a slider 21 capable of blocking the first communication port 111 and the second communication port 112, the slider 21 comprises a seal seat 211, a first seal block 212 and a second seal block 213, the first seal block 212 and the second seal block 213 are respectively arranged at two ends, close to the first communication port 111 and the second communication port 112, of the seal seat 211, the first seal block 212 and the second seal block 213 can respectively abut against end faces of the first communication port 111 and the second communication port 112, so that the first communication port 111 and the second communication port 112 are sealed, and the material strength of the seal seat 211 is greater than that of the first seal block 212 and the second seal block 213.

This application is through making the intensity of seal receptacle 211 be greater than the intensity of first seal piece 212 and second seal piece 213 to avoid under the high-temperature high-pressure condition in valve pocket 113 of slider 21 to produce the deformation under the prerequisite of guaranteeing slider 21 sealing performance, lead to slider 21 to block because of warping in valve pocket 113, arouse the internal leakage.

It should be noted that, when the existing slider is plugged at the first communicating port and the second communicating port, the high-pressure refrigerant entering the valve cavity from the first communicating port and the second communicating port impacts the two ends of the slider, and the slider is not strong enough, so the slider is easy to deform under the impact force.

In particular, strength refers to the ability of a material to resist permanent deformation and fracture under the action of an external force, emphasizing reliability, i.e. failure; hardness refers to the ability of a material to locally resist the penetration of hard objects into its surface. It is therefore necessary to define the hardness of the sealing seat 211 to be greater than the hardness of the first and second sealing blocks 212 and 213 in addition to the strength of the sealing seat 211 to be greater than the strength of the first and second sealing blocks 212 and 213.

As shown in fig. 1, the valve body assembly 10 includes a valve body 11. In the present embodiment, the valve body 11 has a cylindrical shape; of course, in other embodiments, the valve body 11 may have other shapes such as a rectangular parallelepiped, and is not limited herein. The first communication port 111 and the second communication port 112 are respectively correspondingly arranged on two sides of the valve body 11 and communicated with a valve cavity 113 in the valve body 11; the refrigerant outside the valve body 11 can flow into the valve chamber 113 through the first communication port 111 or the second communication port 112, and then flow out of the valve body 11 through the second communication port 112 or the first communication port 111, and both the first communication port 111 and the second communication port 112 are used for the refrigerant inside the valve chamber 113 and the refrigerant outside the valve body 11 to flow into each other.

Note that both the first communication port 111 and the second communication port 112 may be an inlet port or an outlet port of the refrigerant. That is, the first communication port 111 and the second communication port 112 can realize the bidirectional flow of the refrigerant.

Specifically, a first connection pipe 1111 is arranged in the first communication port 111; second connection pipe 1121 is provided in second communication port 112. The first connection pipe 1111 is inserted into the first communication port 111 and welded to the first communication port 111 of the valve body 11, and the second connection pipe 1121 is inserted into the second communication port 112 and welded to the second communication port 112 of the valve body 11. The first connection pipe 1111 and the second connection pipe 1121 are respectively used for connecting with a pipe of an air conditioning unit to communicate refrigerant in the air conditioning pipe with refrigerant in the valve chamber 113.

Further, a first end cap 12 and a second end cap 13 are mounted to both ends of the valve body 11. The first and second end caps 12 and 13 are closely fitted to both ends of the valve body 11 to seal the valve chamber 113.

Since the valve body 11 is cylindrical in this embodiment, the first and second end caps 12 and 13 covering both ends of the valve body 11 are formed in a disc shape; of course, in other embodiments, the first end cap 12 and the second end cap 13 may be correspondingly configured in other shapes such as a square plate shape, and are not limited herein.

Further, an intermediate end cap 14 is also mounted in the valve cavity 113. The intermediate end cover 14 is fixedly connected with the inner wall of the valve body 11 to reduce the risk of leakage. Correspondingly, the intermediate cover 14 is also disc-shaped, but is not limited to disc-shaped, as long as the intermediate cover 14 can be connected with the inner wall of the valve body 11 in a sealing manner. The valve core assembly 20 is disposed through the middle end cover 14, and a portion of the valve core assembly 20 extends toward a direction close to the first end cover 12, and another portion extends toward a direction close to the second end cover 13.

Further, the valve body assembly 10 also includes a valve seat 15. The valve seat 15 is mounted in the valve cavity 113, the first communication port 111 and the second communication port 112 are disposed through the valve seat 15, and the valve core assembly 20 is partially located in the valve seat 15 and can slide in the valve seat 15 to communicate with or block the first communication port 111 and the second communication port 112.

The spool assembly 20 includes a connecting rod 22 and a piston unit 23. The connecting rod 22 penetrates through the middle end cover 14, one end of the connecting rod 22 close to the first end cover 12 is connected to the sliding block 21, one end of the connecting rod 22 close to the second end cover 13 is connected to the piston unit 23, and the piston unit 23 drives the sliding block 21 to slide in the valve cavity 113 through the connecting rod 22. The piston unit 23 is driven in the valve cavity 113, and the connecting rod 22 serves as a connecting part between the slider 21 and the piston unit 23, so that the slider 21 is driven by the piston unit 23 to slide in the valve cavity 113, so that the slider 21 blocks/opens the first communication port 111 and the second communication port 112.

It should be noted that the piston unit 23 is hermetically connected with the inner wall of the valve body 11 all the way, which not only prevents the refrigerant from leaking from the connecting gap between the piston unit 23 and the inner wall of the valve body 11, but also cuts off the refrigerant at the two ends of the piston unit 23, so that a pressure difference is established between the two ends of the piston unit 23 as the driving force for the piston unit 23 moving in the valve chamber 113.

Further, the valve core assembly 20 further includes a guide frame 24, and the guide frame 24 is disposed outside the slide block 21 and connected to the connecting rod 22. The guide frame 24 is fitted around the outer peripheral side of the slider 21, and therefore the slider 21 can be prevented from being inclined by the impact of the medium, and the size of the slider 21 can be reduced.

The valve cavity 113 includes a first chamber 1131, a second chamber 1132, and a third chamber 1133. The first chamber 1131 and the second chamber 1132 are communicated with each other, the first chamber 1131 and the second chamber 1132 are separated from the third chamber 1133, and the third chamber 1133 is arranged in a sealing manner. A first chamber 1131 is formed between the valve body 11, the first end cap 12, and the intermediate end cap 14, a second chamber 1132 is formed between the intermediate end cap 14, the valve body 11, and the piston unit 23, and a third chamber 1133 is formed between the piston unit 23, the valve body 11, and the second end cap 13. In the reversible solenoid valve 100, the piston unit 23 is pushed to move by forming a pressure difference between the second chamber 1132 and the third chamber 1133; and the first chamber 1131 can communicate with the first communication port 111 and the second communication port 112.

The valve body 11 has a first hole 114 and a second hole 115. The first orifice 114 communicates with the second chamber 1132, and the second orifice 115 communicates with the third chamber 1133; the first and

second holes

114 and 115 are used to introduce refrigerant from the outside of the valve body 11 into the valve chamber 113 or to discharge refrigerant from the valve chamber 113. The reversible solenoid valve 100 further includes a pilot valve disposed outside the valve body assembly 10 and connected to the valve body assembly 10, the pilot valve is connected to the valve body 11 through a first capillary and a second capillary, the first capillary is connected to the first hole 114, and the second capillary is connected to the second hole 115, so that a pressure difference is formed between the second chamber 1132 and the third chamber 1133, and the valve core assembly 20 is pushed to move.

When the reversible solenoid valve 100 is in the valve-open state, high-pressure refrigerant enters the second chamber 1132 from the first capillary tube, and refrigerant in the third chamber 1133 flows out from the second capillary tube, and at this time, the pressure of the second chamber 1132 is higher than that of the third chamber 1133, so that the piston unit 23 is pushed to move toward the direction close to the second end cover 13.

When the reversible solenoid valve 100 is in the valve-closing state, high-pressure refrigerant enters the third chamber 1133 from the second capillary tube, and refrigerant in the second chamber 1132 flows out from the first capillary tube, and at this time, the pressure of the third chamber 1133 is higher than that of the second chamber 1132, so that the piston unit 23 is pushed to move toward the direction close to the first end cover 12.

As shown in fig. 2 and 5, the first sealing block 212 has a first opening penetrating through two ends of the first sealing block 212, the second sealing block 213 has a second opening penetrating through two ends of the second sealing block 213, so that the interiors of the first sealing block 212 and the second sealing block 213 are both hollow structures, the first sealing block 212 and the second sealing block 213 are respectively sleeved on the outer peripheries of two ends of the sealing seat 211, and the first sealing block 212 and the second sealing block 213 can be abutted against the first communicating port 111 and the second communicating port 112.

Relatively speaking, the sealing seat 211 with high material strength is mainly used to resist the impact force entering the valve cavity 113 from the first communication port 111 and the second communication port 112, so as to avoid deformation under the impact force; the first sealing block 212 and the second sealing block 213, which have lower material strength than the sealing seat 211, are mainly used to improve the sealing performance, so that the first sealing block and the second sealing block 213 are respectively sleeved on the outer peripheral sides of the two ends of the sealing seat 211, when the slider 21 is plugged at the first communication port 111 and the second communication port 112, the first sealing block 212 and the second sealing block 213 are abutted against the gap between the sealing seat 211 and the first communication port 111, the second communication port 112, thereby ensuring the sealing performance, and the impact force of the high-pressure refrigerant directly acts on the sealing seat 211 to avoid deformation.

Specifically, in one embodiment, the seal seat 211 includes a first seal seat 2111 and a second seal seat 2112, and the first seal seat 2111 and the second seal seat 2112 are provided separately. An inner cavity 214 is formed between the first seal seat 2111 and the second seal seat 2112, an elastic element 215 is arranged in the inner cavity 214, and two ends of the elastic element 215 are abutted against the first seal seat 2111 and the second seal seat 2112 respectively. When the slider 21 is blocked at the first communication port 111 and the second communication port 112, the first seal seat 2111 and the second seal seat 2112 can be tightly abutted against the end surfaces at the first communication port 111 and the second communication port 112, respectively, by the restoring force of the elastic member 215, so that the sealing performance is further enhanced.

Further, the first seal seat 2111 is located at a side close to the first communication port 111 with respect to the second seal seat 2112, the first seal block 212 is sleeved on an outer peripheral side of the first seal seat 2111, and the second seal block 213 is sleeved on an outer peripheral side of the second seal seat 2112.

Preferably, the first 2111 and second 2112 seal seats are stainless steel seats and the first 212 and second 213 seal blocks are plastic or nylon blocks. Of course, in other embodiments, the first seal seat 2111 and the second seal seat 2112 may be made of other metal materials, and the first seal block 212 and the second seal block 213 may be made of other flexible materials, which is not limited herein.

It should be noted that the first seal 2111 and the second seal 2112 are not limited to metal materials, and may be made of non-metal materials with high strength; similarly, the first sealing block 212 and the second sealing block 213 are not limited to be made of non-metal materials, and may also be made of metal materials with lower strength, which is not limited herein.

Further, the coefficient of friction of the first and second seal blocks 212, 213 is less than the coefficient of friction of the first and

second seal seats

2111, 2112.

If the friction coefficient of the first seal block 212 and the second seal block 213 is too large, the slider 21 is jammed between the first communication port 111 and the second communication port 112, and thus the valve is not easily opened, and therefore, the friction coefficient of the first seal block 212 and the second seal block 213 needs to be limited to be smaller than the friction coefficient of the first seal seat 2111 and the second seal seat 2112, and the valve is easily opened.

Since there is a gap at the joint between the sealing block and the sealing seat 211, in order to further prevent the refrigerant from leaking from the joint gap between the sealing block and the sealing seat 211, the first sealing seat 2111 and the first sealing block 212 are integrally formed by injection molding, and/or the second sealing seat 2112 and the second sealing block 213 are integrally formed by injection molding, so that the occurrence of internal leakage is further prevented.

As shown in fig. 2 to 4, in one embodiment of the slider 21, the first seal 2111 and the second seal 2112 are integrally formed.

Specifically, a first seal groove 2111a is formed in the circumferential direction of the first seal seat 2111, and the first seal block 212 is installed in the first seal groove 2111 a; a second seal groove 2112a is formed in the second seal seat 2112 in the circumferential direction, and the second seal block 213 is mounted in the second seal groove 2112 a.

It should be noted that the first sealing block 212 may be installed in the first sealing groove 2111a by injection molding or interference fit, which is not limited herein. A second seal block 213 is mounted in a second seal groove 2112a for the same purpose.

In order to further enhance the connection reliability of the first seal block 212 and the second seal block 213 installed in the first seal groove 2111a and the second seal groove 2112a, a first stopper portion 2111b and a second stopper portion 2112b are respectively provided on groove walls of the first seal groove 2111a and the second seal groove 2112a, and the first stopper portion 2111b and the second stopper portion 2112b respectively abut against the first seal block 212 and the second seal block 213 to stop the first seal block 212 and the second seal block 213. This prevents the first and second seal blocks 212, 213 from failing to unseat from the first and

second seal seats

2111, 2112, causing leakage.

As shown in fig. 3, in an embodiment of the seal seat 211, each of the first and second stopping

portions

2111b and 2112b is one and extends in a radial direction of the first and

second seal seats

2111 and 2112, and the first and second stopping

portions

2111b and 2112b respectively limit the axial falling of the first and second seal blocks 212 and 213.

As shown in fig. 4, in another embodiment of the seal holder 211, the number of the first and second stopping

portions

2111b and 2112b is two, one of which extends in the radial direction of the first and

second seal holders

2111 and 2112, and the other of which extends in the axial direction of the first and

second seal holders

2111 and 2112, such that the first and second stopping

portions

2111b and 2112b limit the axial and radial falling out of the first and second seal blocks 212 and 213, respectively.

In another embodiment of the slider 21, as shown in fig. 5, the first seal 2111 and the second seal 2112 are provided separately.

Specifically, the first sealing seat 2111 includes a first guide sleeve 30 and a first pressing plate 40, the first pressing plate 40 is provided with a first connection hole 41, the first guide sleeve 30 extends into the first connection hole 41 to be fixedly connected with the first pressing plate 40, and the first sealing block 212 is connected to one end of the first pressing plate 40 away from the first guide sleeve 30; the second sealing seat 2112 includes a second guide sleeve 50 and a second pressing plate 60, the second pressing plate 60 has a second connecting hole 61, the second guide sleeve 50 extends into the second connecting hole 61 and is fixedly connected to the second pressing plate 60, and the second sealing block 213 is connected to one end of the second pressing plate 60 far from the second guide sleeve 50.

The first guide sleeve 30 and the first pressure plate 40, the first pressure plate 40 and the first sealing block 212, the second guide sleeve 50 and the second pressure plate 60, and the second pressure plate 60 and the second sealing block 213 are connected by welding. Of course, in other embodiments, other connection methods such as press-fitting and riveting may be adopted, and are not limited herein.

Further, one end of the first sealing block 212, which is far away from the first pressure plate 40, is provided with a first mounting groove 2121, a first stop plate 70 is mounted in the first mounting groove 2121, and the first stop plate 70 is fixedly connected to one end of the first guide sleeve 30, which is close to the first sealing block 212; a second mounting groove 2131 is formed in one end, away from the second pressing plate 60, of the second sealing block 213, a second stop plate 80 is mounted in the second mounting groove 2131, and the second stop plate 80 is fixedly connected to one end, close to the second sealing block 213, of the second guide sleeve 50.

The first stop plate 70 and the first sealing block 212, and the second stop plate 80 and the second sealing block 213 are fixedly connected in a riveting manner. By installing the first and second stopper plates 70 and 80 fixedly connected to the first and second guide sleeves 30 and 50 in the first and second installation grooves 2121 and 2131, good installation strength between the respective parts is achieved, and falling failure is prevented.

The utility model provides a reversible solenoid valve 100, the material intensity through making seal receptacle 211 be greater than the material intensity of first sealed piece 212 and second sealed piece 213 to avoid slider 21 to produce under the highly compressed condition of high temperature in valve pocket 113 and warp under the prerequisite of guaranteeing slider 21 sealing performance, lead to slider 21 to block because of warping in valve pocket 113 and die, arouse the internal leakage.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A reversible electromagnetic valve comprises a valve body assembly (10) and a valve core assembly (20), wherein a first communicating port (111) and a second communicating port (112) are respectively formed in two sides of the valve body assembly (10), the valve body assembly (10) is provided with a valve cavity (113), the valve core assembly (20) is arranged in the valve cavity (113), and the valve core assembly (20) can slide in the valve cavity (113) to enable the first communicating port (111) and the second communicating port (112) to be communicated or separated;

the valve core assembly (20) is characterized by comprising a sliding block (21) capable of blocking the first communicating port (111) and the second communicating port (112), the sliding block (21) comprises a sealing seat (211), a first sealing block (212) and a second sealing block (213), the first sealing block (212) and the second sealing block (213) are respectively arranged at two ends, close to the first communicating port (111) and the second communicating port (112), of the sealing seat (211), the first sealing block (212) and the second sealing block (213) can be respectively abutted to end faces at the first communicating port (111) and the second communicating port (112), and the strength of the sealing seat (211) is greater than that of the first sealing block (212) and the second sealing block (213).

2. The reversible solenoid valve according to claim 1, characterized in that the hardness of the sealing seat (211) is greater than the hardness of the first sealing block (212) and the second sealing block (213).

3. The reversible solenoid valve according to claim 2, wherein the first sealing block (212) defines a first opening, the first opening extends from one end of the first sealing block (212) to the other end of the first sealing block (212), the second sealing block (213) defines a second opening, the second opening extends from one end of the second sealing block (213) to the other end of the second sealing block (213), and two ends of the sealing seat (211) extend into the first opening and the second opening respectively.

4. The reversible solenoid valve according to claim 3, wherein the sealing seat (211) includes a first sealing seat (2111) and a second sealing seat (2112), the first sealing seat (2111) is located at a side close to the first communication port (111) relative to the second sealing seat (2112), the first sealing block (212) is sleeved on an outer circumferential side of the first sealing seat (2111), the second sealing block (213) is sleeved on an outer circumferential side of the second sealing seat (2112), and the first sealing seat (2111) and the second sealing seat (2112) are arranged in an opposing and separated manner.

5. The reversible solenoid valve according to claim 1, characterized in that said sealing seat (211) is a stainless steel seat and said first sealing block (212) and said second sealing block (213) are plastic blocks or nylon blocks.

6. The reversible solenoid valve according to claim 1, characterized in that the friction coefficient of the first sealing block (212) and of the second sealing block (213) is lower than the friction coefficient of the sealing seat (211).

7. The reversible solenoid valve according to claim 4, characterized in that the first sealing seat (2111) and the first sealing block (212) are integrally formed by injection molding and/or the second sealing seat (2112) and the second sealing block (213) are integrally formed by injection molding.

8. The reversible solenoid valve according to claim 4, characterized in that said first sealing seat (2111) and said second sealing seat (2112) are both provided in one piece.

9. The reversible solenoid valve according to claim 8, characterized in that said first seal seat (2111) opens with a first seal groove (2111a), said first seal block (212) being mounted in said first seal groove (2111 a);

the second seal seat (2112) is provided with a second seal groove (2112a), and the second seal block (213) is installed in the second seal groove (2112 a).

10. The reversible solenoid valve according to claim 9, wherein a first stop portion (2111b) and a second stop portion (2112b) are respectively disposed on groove walls of the first sealing groove (2111a) and the second sealing groove (2112a), and the first stop portion (2111b) and the second stop portion (2112b) respectively abut against the first sealing block (212) and the second sealing block (213) to stop the first sealing block (212) and the second sealing block (213).

11. The reversible electromagnetic valve according to claim 4, wherein the first sealing seat (2111) and the second sealing seat (2112) are separately arranged, the first sealing seat (2111) includes a first guide sleeve (30) and a first pressure plate (40), the first pressure plate (40) is provided with a first connection hole (41), the first guide sleeve (30) extends into the first connection hole (41) to be fixedly connected with the first pressure plate (40), and the first sealing block (212) is connected to one end of the first pressure plate (40) away from the first guide sleeve (30);

the second sealing seat (2112) comprises a second guide sleeve (50) and a second pressing plate (60), a second connecting hole (61) is formed in the second pressing plate (60), the second guide sleeve (50) extends into the second connecting hole (61) and is fixedly connected with the second pressing plate (60), and the second sealing block (213) is connected to one end, far away from the second guide sleeve (50), of the second pressing plate (60).

12. The reversible solenoid valve according to claim 11, wherein a first mounting groove (2121) is formed at an end of the first sealing block (212) away from the first pressure plate (40), a first stop plate (70) is mounted in the first mounting groove (2121), and the first stop plate (70) is fixedly connected to an end of the first guide sleeve (30) close to the first sealing block (212);

a second mounting groove (2131) is formed in one end, far away from the second pressing plate (60), of the second sealing block (213), a second stopping plate (80) is mounted in the second mounting groove (2131), and the second stopping plate (80) is fixedly connected to one end, close to the second sealing block (213), of the second guide sleeve (50).