CN115388189A - Reversible solenoid valve and refrigerating system thereof - Google Patents

Abstract

The invention relates to the technical field of refrigeration, in particular to a reversible electromagnetic valve and a refrigeration system. A reversible electromagnetic valve comprises a valve body and a valve core assembly, wherein the valve body is provided with a valve cavity, and a first communicating hole and a second communicating hole which are communicated with the valve cavity are formed in the valve body; the valve core assembly is positioned in the valve cavity and can move in the valve cavity so as to enable the first communication hole and the second communication hole to be communicated or isolated; a second end cover is arranged in the valve cavity, and the valve core assembly penetrates through the second end cover; the reversible electromagnetic valve further comprises a first stopping device, wherein the first stopping device is arranged in the valve cavity and can be matched with the second end cover to limit the valve core assembly to move towards the direction close to the first communicating hole and the second communicating hole. The invention has the advantages that: when the valve core assembly moves in the valve body, the impact force generated when the valve core assembly collides with the internal structure of the valve body is reduced, the loss of each part in the valve body is reduced when the valve core assembly collides with the internal structure of the valve body, and the service life of the reversible electromagnetic valve is prolonged.

Description

Reversible electromagnetic valve and refrigerating system thereof

Technical Field

The invention relates to the technical field of refrigeration, in particular to a reversible electromagnetic valve and a refrigeration system thereof.

Background

In a refrigeration system, a solenoid valve is usually provided to switch the refrigeration system, and the solenoid valve includes a valve core assembly and a valve body, and the solenoid valve is switched by moving the valve core assembly inside the valve body.

The existing electromagnetic valve has the advantages that in the switching process, the valve core assembly can axially move in the valve body, the electromagnetic valve is connected with a high-pressure exhaust pipe and a low-pressure air suction pipe of a compressor, a high-pressure medium can enable the valve core assembly to rapidly slide, the valve core assembly is collided with the inner wall of the valve body or parts, the internal structure of the valve core assembly is connected loosely, and the airtightness of the valve core assembly and the inner wall of the valve body can be affected.

Disclosure of Invention

Based on this, the present invention provides a reversible solenoid valve, which aims at the above technical problems, and the technical scheme is as follows:

a reversible electromagnetic valve comprises a valve body and a valve core assembly, wherein the valve body is provided with a valve cavity, and a first communicating hole and a second communicating hole which are communicated with the valve cavity are formed in the valve body; the valve core assembly is positioned in the valve cavity and can move in the valve cavity so as to enable the first communication hole and the second communication hole to be communicated or isolated; a second end cover is arranged in the valve cavity, the valve core assembly penetrates through the second end cover, one part of the valve core assembly is positioned on one side, close to the first communication hole, of the second end cover, and one part of the valve core assembly is positioned on one side, far away from the first communication hole, of the second end cover; the reversible electromagnetic valve further comprises a first stopping device, the first stopping device is arranged in the valve cavity, and when the reversible electromagnetic valve is located at the first position, the first stopping device can be matched with the second end cover to limit the valve core assembly to move towards the direction close to the first communicating hole and the second communicating hole.

So set up, can restrict reversible solenoid valve when closing the valve, case subassembly and valve body inner wall produce the great collision of impact, prevent that the connection position of case subassembly inner structure from producing not hard up.

In one embodiment, a third end cover is disposed at one end of the valve body, the reversible solenoid valve further includes a second stopping device disposed in the valve cavity, and when the reversible solenoid valve is in the second position, the second stopping device is capable of cooperating with the third end cover to limit the valve core assembly to move in a direction away from the first communicating hole and the second communicating hole.

So set up, the case subassembly can with the close cooperation of third end cover, make the cooperation of third end cover and second backstop device play the spacing effect of direction to the axial displacement of case subassembly, prevent that the removal of case subassembly from producing the deviation.

In one embodiment, the first stopping means is a first protrusion structure, the valve core assembly includes a piston part, the piston part is disposed between the second end cover and the third end cover, the first protrusion structure is disposed on a side of the second end cover facing the piston part, and/or the first protrusion structure is disposed on a side of the piston part facing the second end cover.

So set up for first backstop device sets up in a flexible way between second end cover and piston part, provides great adjustment space for the device, provides multiple scheme with the setting position of first backstop device.

In one embodiment, the second stop means is a second raised structure, the valve core assembly comprises a piston member which is slidable between the second end cap and the third end cap, the second raised structure is provided on the side of the third end cap facing the piston member, and/or the second raised structure is provided on the side of the piston member facing the third end cap.

So set up for the nimble setting of second backstop device is between second end cover and piston part, provides great adjustment space for the device, provides multiple scheme with the setting position of second backstop device.

In one embodiment, the valve core assembly comprises a blocking structure, a connecting rod and a piston part, the blocking structure and the piston part are respectively connected to two ends of the connecting rod, and when the reversible electromagnetic valve is in the first position, the blocking structure can isolate medium flowing between the first communication hole and the second communication hole.

So set up, to block structure, connecting rod and piston part and connect as an organic wholely, can only drive two other parts through the removal of one of them piston part, block the bulk movement of structure and connecting rod promptly, simplified the structure of case subassembly under the holistic work efficiency's of assurance case subassembly the condition.

In one embodiment, an accommodating chamber is formed in the blocking structure, a first elastic member is arranged in the accommodating chamber, one end of the first elastic member abuts against the inner wall of the accommodating chamber close to the first communication hole, and the other end of the first elastic member abuts against the inner wall of the accommodating chamber close to the second communication hole.

With the arrangement, when a medium enters the first communicating hole or the second communicating hole and generates a large impact force on the blocking structure, the first elastic piece in the accommodating cavity can buffer the impact force of the medium, so that the service life of the blocking structure is prolonged; and, first elastic component plays the supporting role to blocking the structure, when reversible solenoid valve closed, can make the terminal surface of blocking the first intercommunication mouth of structure laminating and second intercommunication mouth more, strengthens the leakproofness of shutoff.

In one embodiment, the valve core assembly includes a piston component, the piston component includes a first piston bowl and a second piston bowl which are bowl-shaped, the first piston bowl and the second piston bowl are arranged opposite to each other and connected to each other, the first piston bowl is arranged towards the second end cover, and the second piston bowl is arranged towards the third end cover such that outer side walls of the first piston bowl and the second piston bowl are abutted to an inner wall of the valve cavity.

So set up, effort between baffle, middle baffle and outer baffle and the valve body inner wall in can absorbing by first piston bowl and second piston bowl, the loss that collision friction produced between baffle, middle baffle and the outer baffle in reducing.

In one embodiment, the inner walls of the first piston bowl and the second piston bowl are provided with second elastic pieces.

So set up, the elasticity of first piston bowl and second piston bowl can be strengthened to the second elastic component, makes its and valve body inner wall butt better.

In one embodiment, the piston assembly further comprises an inner baffle, an intermediate baffle and an outer baffle, the inner baffle is disposed in the first piston bowl, the outer baffle is disposed in the second piston bowl, and the inner baffle, the outer baffle, the first piston bowl and the second piston bowl are connected through the intermediate baffle.

So set up, can strengthen piston component's intensity, and interior baffle and outer baffle play limiting displacement.

The invention also provides the following technical scheme:

a refrigerating system comprises the reversible solenoid valve.

Compared with the prior art, the reversible electromagnetic valve provided by the invention has the advantages that the first stop device matched with the second end cover is arranged in the valve body, so that the impact force generated when the valve core assembly collides with the internal structure of the valve body when moving in the valve body is reduced, the loss of each part in the valve body is reduced when colliding, and the service life of the reversible electromagnetic valve is prolonged.

Drawings

Fig. 1 is a first position sectional view of a reversible solenoid valve according to a first embodiment of the present invention;

FIG. 2 is a second cross-sectional view of a reversible solenoid valve according to a first embodiment of the present invention;

fig. 3 is a first position sectional view of a reversible solenoid valve according to a second embodiment of the present invention;

fig. 4 is a second position sectional view of a reversible solenoid valve according to a second embodiment of the present invention;

FIG. 5 is a perspective view of a second end cap according to the second embodiment;

FIG. 6 is a right side view of the second end cap of the second embodiment;

FIG. 7 isbase:Sub>A cross-sectional view A-A of FIG. 6;

fig. 8 is a perspective view of a piston member according to a third embodiment;

FIG. 9 is a sectional view of a piston member in the third embodiment;

FIG. 10 is a left side view of the piston assembly of the third embodiment;

FIG. 11 is a perspective view of a piston assembly according to one embodiment;

FIG. 12 is a front view of a piston assembly according to one embodiment;

FIG. 13 is a left side view of the piston assembly of the first embodiment;

FIG. 14 is a cross-sectional view of a piston assembly according to one embodiment.

The symbols in the figures represent the following:

100. a reversible solenoid valve; 10. a valve body; 11. a first communication hole; 12. a second communication hole; 13. a third communication hole; 14. a fourth communication hole; 15. a valve cavity; 151. a first valve chamber; 152. a second valve cavity; 153. a third valve cavity; 154. a fourth valve cavity; 20. an end cap; 21. a first end cap; 22. a second end cap; 23. a third end cap; 30. a valve core assembly; 31. a blocking structure; 311. a first elastic member; 312. an accommodating cavity; 32. a connecting rod; 33. a piston member; 331. an inner baffle; 332. an intermediate baffle; 333. an outer baffle; 334. a second elastic member; 335. flat head rivets; 336. a first piston bowl; 337. a second piston bowl; 34. a first stop means; 341. a first bump structure; 35. a second stop means; 351. and a second bump structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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.

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 in the description of the invention herein 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 14, the reversible solenoid valve 100 is applied to a refrigeration system for realizing bidirectional circulation of a medium.

The reversible solenoid valve 100 includes a valve body 10 and a valve core assembly 30, the valve core assembly 30 is disposed inside the valve body 10 and can axially move inside the valve body 10, so as to open and close the reversible solenoid valve 100.

Specifically, the valve body 10 is provided with a first communicating hole 11 and a second communicating hole 12, one end of the first communicating hole 11 and the second communicating hole 12 can communicate with the inside of the valve body 10, and the other end is used as an inlet and an outlet of the medium, forming a passage for the medium to pass through. The first communication hole 11 may be an inlet or an outlet, and the second communication hole 12 may be an inlet and an outlet, and when the first communication hole 11 is an inlet, the second communication hole 12 is an outlet, or vice versa.

The two ends of the valve body 10 are respectively provided with a first end cover 21 and a third end cover 23, and the first end cover 21 and the third end cover 23 seal the valve body 10. A first end cover 21 is provided at an end of the valve body 10 close to the first communication hole 11 and the second communication hole 12, and a third end cover 23 is provided at an end of the valve body 10 far from the first communication hole 11. The valve body 10 is provided with a second end cap 22 therein, one end of the valve core assembly 30 is disposed between the first end cap 21 and the second end cap 22, and the other end thereof penetrates through the second end cap 22 and extends into a space between the second end cap 22 and the third end cap 23.

Specifically, the valve body 10 has a valve cavity 15, the valve cavity 15 includes a first valve cavity 151, a second valve cavity 152, a third valve cavity 153 and a fourth valve cavity 154, the first valve cavity 151 is formed by matching a first end cover 21 and a valve core assembly 30, the second valve cavity 152 is formed by matching one sides of the valve core assembly 30 and a second end cover 22 close to a first communicating hole 11 and a second communicating hole 12, the third valve cavity 153 is formed by matching one side of the second end cover 22 far away from the first communicating hole 11 and the valve core assembly 30, the fourth valve cavity 154 is formed by matching the valve core assembly 30 and a third end cover 23, and the first valve cavity 151 and the second valve cavity 152 are mutually communicated to form a flow cavity.

The valve core assembly 30 is located in the valve cavity 15 and comprises a blocking structure 31, a connecting rod 32 and a piston part 33, the blocking structure 31 is connected with the piston part 33 through the connecting rod 32, and the blocking structure 31 and the piston part 33 are respectively connected to two ends of the connecting rod 32.

Specifically, the blocking structure 31 is disposed in the flow-through chamber, and when the reversible solenoid valve 100 is in the first position, the blocking structure 31 can block the medium flow between the first communication hole 11 and the second communication hole 12. It should be noted that the first position herein refers to the reversible solenoid valve 100 being in a closed state, and the second position hereinafter refers to the reversible solenoid valve 100 being in an open state.

Specifically, the blocking structure 31 is provided with a receiving cavity 312, a first elastic member 311 is disposed in the receiving cavity 312, one end of the first elastic member 311 abuts against an inner wall of the receiving cavity 312 close to the first communicating hole 11, and the other end abuts against an inner wall of the receiving cavity 312 close to the second communicating hole 12. When the reversible electromagnetic valve 100 is closed, the medium flows in from the first communicating hole 11, and impacts the blocking structure 31, at this time, the first elastic piece 311 in the accommodating cavity 312 can buffer the impact force of the medium, so as to prolong the service life of the blocking structure 31, and meanwhile, the first elastic piece 311 can support the blocking structure 31, so as to enhance the sealing performance of the blocking structure 31 for the first communicating hole 11 and the second communicating hole 12.

Referring to fig. 11-14, the piston assembly 33 includes a first piston bowl 336 and a second piston bowl 337 having a bowl shape, the first piston bowl 336 and the second piston bowl 337 are disposed opposite to each other and connected to each other, the first piston bowl 336 is disposed toward the second end cover 22, and the second piston bowl 337 is disposed toward the third end cover 23. The outer side walls of the first piston bowl 336 and the second piston bowl 337 abut against the inner wall of the valve chamber 15. First piston bowl 336 and second piston bowl 337 adopt flexible material preparation such as polyvinyl chloride, and first piston bowl 336 and second piston bowl 337 can make piston member 33 keep the leakproofness with the valve body 10 inner wall at gliding in-process to, the structure of bowl form can increase the pressure of first piston bowl 336 and second piston bowl 337 and valve body 10 inner wall butt, strengthens sealed effect.

Specifically, all be equipped with second elastic component 334 at first piston bowl 336 and second piston bowl 337 inner wall, second elastic component 334 is two and all is the annular, one of them second elastic component 334 butt in the inner wall of first piston bowl 336, another second elastic component 334 butt is at the inner wall of second piston bowl 337, the dynamics that first piston bowl 336 and second piston bowl 337 and valve body 10 inner wall butt can be adjusted to second elastic component 334, not only can guarantee piston part 33 and slide smoothly, and can guarantee the leakproofness moreover.

Preferably, the second elastic member 334 may be a tooth spring, which has strong toughness and strength, and can make the first piston bowl 336 and the second piston bowl 337 more reliably abut against the inner wall of the valve cavity 15.

The piston member 33 further includes an inner barrier 331, an intermediate barrier 332, and an outer barrier 333, wherein the inner barrier 331 is disposed in the first piston bowl 336, the outer barrier 333 is disposed in the second piston bowl 337, and the inner barrier 331, the outer barrier 333, the first piston bowl 336, and the second piston bowl 337 are connected by the intermediate barrier 332, one of the second elastic members 334 is disposed between the first piston bowl 336 and the inner barrier 331, and the other second elastic member 334 is disposed between the second piston bowl 337 and the outer barrier 333. Two flat-head rivets 335 are transversely arranged and sequentially penetrate through the inner baffle 331, the first piston bowl 336, the middle baffle 332, the second piston bowl 337 and the outer baffle 333 of the piston member 33, so that the five are tightly connected.

The reversible solenoid valve 100 further includes a pilot valve (not shown), the valve body 10 is further provided with a third communicating hole 13 and a fourth communicating hole 14, one end of the third communicating hole 13, which is communicated with the valve body 10, is connected to the third valve chamber 153, the other end of the third communicating hole is connected to the pilot valve, one end of the fourth communicating hole 14, which is communicated with the valve body 10, is connected to the fourth valve chamber 154, the other end of the fourth communicating hole is also connected to the pilot valve, and the pilot valve can move the piston member 33 by controlling a pressure difference between the third valve chamber 153 and the fourth valve chamber 154.

Specifically, when the third communicating hole 13 and the fourth communicating hole 14 form a pressure difference in the third valve chamber 153 and the fourth valve chamber 154 to push the piston member 33 to move, the piston member 33 will drive the connecting rod 32 to move in the same direction and at the same speed, and drive the blocking structure 31 to move laterally, thereby implementing the function of blocking the medium flowing between the first communicating hole 11 and the second communicating hole 12 by the blocking structure 31.

The reversible solenoid valve 100 further includes a first stopping device 34, the first stopping device 34 is disposed in the valve chamber 15, and when the reversible solenoid valve 100 is in the first position, the first stopping device 34 can limit the valve core assembly 30 from moving toward the first communicating hole 11 and the second communicating hole 12. It will be appreciated that the first stop 34 can cooperate with the second end cap 22 to limit further movement of the cartridge assembly 30 during valve closing to protect the cartridge assembly 30 from impacting the inner wall or other components of the valve body 10 and affecting the life of the reversible solenoid valve 100.

The reversible solenoid valve 100 further includes a second stopping device 35, the second stopping device 35 is disposed in the valve chamber 15, and when the reversible solenoid valve 100 is in the second position, the second stopping device 35 can limit the movement of the valve core assembly 30 towards a direction away from the first communicating hole 11 and the second communicating hole 12. It will be appreciated that the first stop 34 can cooperate with the second end cap 22 to limit further movement of the cartridge assembly 30 during opening of the valve, protecting the cartridge assembly 30 from impacting the inner wall or other components of the valve body 10, and avoiding affecting the life of the reversible solenoid valve 100.

The first stop means 34 is arranged between the second end cap 22 and the piston member 33, the second stop means 35 is arranged between the piston member 33 and the third end cap 23, and the first stop means 34 and the second stop means 35 limit the movement of the piston member 33.

Referring to fig. 1-2, and fig. 11-14, in the first embodiment, the first stopping device 34 is a first protrusion 341, and the first protrusion 341 is a bowl-shaped protrusion and is disposed on the side surface of the inner stop 331 of the piston member 33 facing the second end cap 22. The second stop means 35 is a second protruding structure 351. The second protruding structure 351 is a bowl-shaped protrusion and is arranged on the side of the outer barrier 333 of the piston member 33 facing the third end cap 23.

Referring to fig. 3-4, and fig. 5-7, in the second embodiment, the first stopping means 34 is a first protrusion 341, and the first stopping means 34 is a bowl-shaped protrusion and is disposed on the side of the second end cap 22 facing the piston member 33. The second stop means 35 is a second protrusion 351 in the form of a bowl-shaped protrusion, which is arranged on the side of the outer barrier 333 of the piston member 33 facing the third end cap 23.

Referring to fig. 8-10, in the third embodiment, the first stopping device 34 is a first protrusion 341, and the first protrusion 341 is a bowl-shaped protrusion and is disposed on the side surface of the inner stop 331 of the piston member 33 facing the second end cap 22. The second stop means 35 is a second protruding structure 351 in the form of a bowl-shaped protrusion, which is arranged on the side of the third end cap 23 facing the piston member 33.

In the fourth embodiment, the first stopping means 34 is a first protruding structure 341 in the form of a bowl-shaped protrusion, which is arranged on the side of the second end cap 22 facing the piston member 33. The second stop means 35 is a second protruding structure 351 in the form of a bowl-shaped protrusion, which is arranged on the side of the third end cap 23 facing the piston member 33.

The present invention also provides a refrigeration system comprising the above-described reversible solenoid valve 100.

In operation (as an example of the first embodiment), when cooling is required, the pilot valve feeds high-pressure medium from the third communication hole 13 into the third valve chamber 153, so that the pressure in the third valve chamber 153 is increased, and the fourth valve chamber 154 is connected to the low-pressure outlet of the pilot valve, and the pressure is lower. At this time, a pressure difference is formed between the third valve chamber 153 and the fourth valve chamber 154, and the piston member 33 is pushed to move to the second position by the pressure difference, and the piston member 33 drives the blocking structure 31 to move toward the third end cover 23 through the connecting rod 32, so that the first valve chamber 151 between the first communication hole 11 and the second communication hole 12 is opened, and the medium can flow between the first communication hole 11 and the second communication hole 12.

Further, the piston member 33 is provided with a second projection structure 351 on the side of the outer barrier 333 of the third end cap 23, and at the end of the stroke of the piston member 33 moving toward the third end cap 23, the second projection structure 351 abuts against the third end cap 23, and the outer barrier 333 of the piston member 33 and the rivet on the outer barrier 333 are prevented from directly colliding with the third end cap 23.

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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A reversible electromagnetic valve comprises a valve body (10) and a valve core assembly (30), wherein the valve body (10) is provided with a valve cavity (15), and the valve body (10) is provided with a first communicating hole (11) and a second communicating hole (12) which are communicated with the valve cavity (15); the valve core assembly (30) is positioned in the valve cavity (15) and can move in the valve cavity (15) to enable the first communication hole (11) and the second communication hole (12) to be communicated or cut off;

the valve core assembly is characterized in that a second end cover (22) is arranged in the valve cavity (15), the valve core assembly (30) penetrates through the second end cover (22), one part of the valve core assembly (30) is positioned on one side, close to the first through hole (11), of the second end cover (22), and one part of the valve core assembly is positioned on one side, far away from the first through hole (11), of the second end cover (22); the reversible electromagnetic valve further comprises a first stopping device (34), the first stopping device (34) is arranged in the valve cavity (15), and when the reversible electromagnetic valve is located at the first position, the first stopping device (34) can be matched with the second end cover (22) to limit the valve core assembly (30) to move towards the direction close to the first communication hole (11) and the second communication hole (12).

2. The reversible solenoid valve according to claim 1, characterized in that a third end cap (23) is provided at one end of the valve body (10), the reversible solenoid valve further comprises a second stop device (35), the second stop device (35) is provided in the valve chamber (15), and when the reversible solenoid valve is in the second position, the second stop device (35) is capable of cooperating with the third end cap (23) to limit the movement of the valve core assembly (30) in a direction away from the first communication hole (11) and the second communication hole (12).

3. The reversible solenoid valve according to claim 2, characterized in that the first stop means (34) is a first raised structure (341), the spool assembly (30) comprises a piston member (33), the piston member (33) being provided between the second end cap (22) and the third end cap (23), the first raised structure (341) being provided on the side of the second end cap (22) facing the piston member (33) and/or the first raised structure (341) being provided on the side of the piston member (33) facing the second end cap (22).

4. The reversible solenoid valve according to claim 2, characterized in that the second stop means (35) is a second raised structure (351), the spool assembly (30) comprising a piston member (33), the piston member (33) being provided between the second end cap (22) and the third end cap (23), the second raised structure (351) being provided on the side of the third end cap (23) facing the piston member (33) and/or the second raised structure (351) being provided on the side of the piston member (33) facing the third end cap (23).

5. The reversible solenoid valve according to claim 1, characterized in that the spool assembly (30) comprises a blocking structure (31), a connecting rod (32) and a piston member (33), the blocking structure (31) and the piston member (33) being connected to two ends of the connecting rod (32), respectively, the blocking structure (31) being capable of blocking the medium flow between the first communication hole (11) and the second communication hole (12) when the reversible solenoid valve is in the first position.

6. The reversible solenoid valve according to claim 5, wherein an accommodating cavity (312) is formed inside the blocking structure (31), a first elastic member (311) is disposed inside the accommodating cavity (312), one end of the first elastic member (311) abuts against an inner wall of the accommodating cavity (312) close to the first communication hole (11), and the other end abuts against an inner wall of the accommodating cavity (312) close to the second communication hole (12).

7. The reversible solenoid valve according to claim 2, wherein the spool assembly (30) comprises a piston member (33), the piston member (33) comprises a first piston bowl (336) and a second piston bowl (337) in a bowl shape, the first piston bowl (336) and the second piston bowl (337) are disposed opposite to each other and connected to each other, the first piston bowl (336) is disposed toward the second end cover (22), and the second piston bowl (337) is disposed toward the third end cover (23) such that outer sidewalls of the first piston bowl (336) and the second piston bowl (337) abut against an inner wall of the valve chamber (15).

8. The reversible solenoid valve of claim 7, wherein the inner walls of the first piston bowl (336) and the second piston bowl (337) are each provided with a second resilient member (334).

9. The reversible solenoid valve of claim 7, wherein the piston member (33) further comprises an inner barrier (331), an intermediate barrier (332), and an outer barrier (333), the inner barrier (331) is disposed within the first piston bowl (336), the outer barrier (333) is disposed within the second piston bowl (337), and the inner barrier (331), the outer barrier (333), the first piston bowl (336), and the second piston bowl (337) are connected by the intermediate barrier (332).

10. A refrigeration system comprising a reversible solenoid valve according to any one of claims 1 to 9.

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