CN114484003A

CN114484003A - Reversing valve and refrigerating system

Info

Publication number: CN114484003A
Application number: CN202011267035.3A
Authority: CN
Inventors: 张克鹏
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2022-05-13

Abstract

The invention relates to the technical field of refrigeration, in particular to a reversing valve and a refrigeration system. A reversing valve comprises a valve body, a valve seat and a sliding block, wherein the valve seat and the sliding block are arranged in the valve body, a first connecting port and a plurality of communicating ports are formed in the valve body, the communicating ports penetrate through the valve seat, the sliding block is arranged on the valve seat and can slide in the valve body, the first connecting port is provided with a first connecting pipe, and a medium can enter the valve body from the first connecting pipe; the reversing valve further comprises a drainage structure, the drainage structure is arranged in the valve body and located at the first connecting port, the drainage structure comprises a drainage portion and a fixing portion which are connected with each other, the drainage portion is connected in the first connecting pipe through the fixing portion, a part of the drainage portion stretches into the first connecting pipe, and a part of the drainage portion stretches into the valve body and medium enters the valve body through drainage of the drainage portion. The invention has the advantages that: the pressure that the slider received can be reduced to reduce the frictional force between slider and the disk seat.

Description

Reversing valve and refrigerating system

Technical Field

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

Background

In a refrigeration system, a reversing valve is usually arranged to switch different functions of the refrigeration system, the reversing valve comprises a slide valve assembly and a valve body, a valve seat is arranged in the valve body, and the valve seat slides in the valve body through the slide valve assembly to realize the communication of different connectors.

The existing reversing valve has the advantages that in the reversing process, the sliding block can transversely slide on the valve seat, the first connecting port is connected with the high-pressure exhaust port of the compressor, a high-pressure medium can form positive impact on the sliding block, particularly, the impact force on the part of the sliding block right below the first connecting port is maximum, the friction force between the sliding block and the valve seat in the sliding process is increased, and accordingly, large noise is generated.

Disclosure of Invention

Based on this, the invention provides a reversing valve aiming at the technical problems, and the technical scheme is as follows:

a reversing valve comprises a valve body, a valve seat and a sliding block, wherein the valve seat and the sliding block are arranged in the valve body, a first connecting port and a plurality of communicating ports are formed in the valve body, the communicating ports penetrate through the valve seat, the sliding block is arranged on the valve seat and can slide in the valve body, a first connecting pipe is arranged at the first connecting port, and a medium can enter the valve body from the first connecting pipe; the reversing valve further comprises a drainage structure, the drainage structure is arranged in the valve body and located at the first connecting port, the drainage structure comprises a drainage portion and a fixing portion which are connected with each other, the drainage portion is connected with the fixing portion in the first connecting pipe, the drainage portion stretches into the valve body, and a medium enters the drainage portion in the valve body.

Due to the arrangement, the blocking and the drainage of the drainage part can change the flow direction of the medium, so that part of the medium can be drained to the outer side of the sliding block without directly impacting the sliding block, the flow speed of the medium can be reduced, and the pressure on the part of the sliding block right below the first connecting port is reduced, so that the friction force between the sliding block and the valve seat in the sliding process is reduced, and the noise is avoided; but also can prolong the flow channel of the drainage part, strengthen the drainage function and save space.

In one embodiment, the drainage portion at least includes a first baffle and a second baffle connected to each other, an end of the first baffle, which is far away from the second baffle, extends toward a direction away from the central axis of the first connecting pipe and a direction away from the sliding block, and an end of the second baffle, which is far away from the first baffle, extends toward a direction close to the sliding block and a direction away from the central axis of the first connecting pipe.

So set up for the whole slope of drainage portion sets up, can change the flow direction of medium by bigger degree, and more medium drainage is to the outside of slider and not directly impact the slider.

In one embodiment, one end of the first baffle, which is far away from the second baffle, is spaced from the inner wall of the first connecting pipe, and the surface of the second baffle, which is far away from the sliding block, is spaced from the inner wall of the first connecting pipe.

So set up, the clearance between the inner wall that second baffle and first connecting port were kept away from to partial medium from first baffle flows, and the drainage portion forms the multithread way, can make the medium dispersion flow, reduces the impact to the slider that is located under the first connecting port, directly to the outside of drainage to slider and not directly impact the slider with more medium.

In one embodiment, the first baffle and the second baffle are both arc-shaped, the outer convex surface of the first baffle is far away from the sliding block, and the inner concave surface of the second baffle is far away from the sliding block.

So set up, can make first baffle and second baffle transition naturally, avoid producing the depressed part that can pile up the medium in the junction of first baffle and second baffle for the medium gets into in the valve body smoothly.

In one embodiment, the radian of the first baffle is 90 °, the radian of the second baffle is 90 °, the first baffle has a second end face, the second baffle has a third end face attached to the second end face, a connection line between the center of the second end face and the center of the first baffle is parallel to the sliding direction of the slider, and a connection line between the center of the third end face and the center of the second baffle is parallel to the sliding direction of the slider.

So set up, not only can avoid producing on first baffle and the second baffle and be unfavorable for the sunken of medium flow, can make the second baffle moreover with the medium drainage farther from the slider.

In one embodiment, the first baffle and the second baffle are both arc-shaped, the inner concave surface of the first baffle is far away from the sliding block, and the outer convex surface of the second baffle is far away from the sliding block.

In one embodiment, the radian of the first baffle is 90 °, the radian of the second baffle is 90 °, the first baffle has a second end face, the second baffle has a third end face attached to the second end face, a connection line between the center of the second end face and the center of the first baffle is perpendicular to the sliding direction of the slider, and a connection line between the center of the third end face and the center of the second baffle is perpendicular to the sliding direction of the slider.

In one embodiment, one end of the drainage part close to the sliding block is arranged at a distance from the surface of the sliding block close to the first connecting port.

So set up, can make the slider can slide smoothly.

In one embodiment, the fixing portion is annular, the inner side of the annular fixing portion is connected with the drainage portion, and the outer side of the fixing portion abuts against the inner wall of the first connecting port.

So set up, can strengthen the stability of drainage structure installation.

The invention also provides the following technical scheme:

a refrigerating system comprises the reversing valve.

Compared with the prior art, the reversing valve provided by the invention has the advantages that the drainage structure is arranged, one part of the drainage structure extends into the first connecting pipe, the other part of the drainage structure extends into the valve body, the drainage part can not only block the medium, but also change the flow direction of the medium, so that part of the medium is directly drained to the outer side of the sliding block without impacting the sliding block, the flow speed of the medium is reduced, the pressure on the sliding block right below the first connecting port is reduced, the friction force between the sliding block and the valve seat is reduced, and the sliding block is prevented from generating noise when sliding.

Drawings

FIG. 1 is a cross-sectional view of a reversing valve according to a first embodiment of the present invention;

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

FIG. 3 is a perspective view of the diverter valve;

FIG. 4 is a right side view of the reversing valve;

FIG. 5 is a top view of the diverter valve;

FIG. 6 is a front view of the drainage structure according to the first embodiment;

FIG. 7 is a perspective view of a drainage structure according to the first embodiment;

FIG. 8 is a left side view of the drainage structure of the first embodiment;

FIG. 9 is a top view of the drainage structure of the first embodiment;

fig. 10 is a partially enlarged view of a portion a in fig. 2.

The symbols in the drawings represent the following meanings:

100. a diverter valve; 10. a valve body; 101. a communication port; 102. a first lumen; 103. an end cap; 1031. a first end cap cavity; 1032. a second end cap cavity; 11. a valve seat; 12. a first connection port; 13. a second connection port; 14. a third connection port; 15. a fourth connection port; 16. a first connecting pipe; 17. a second connecting pipe; 18. a third connecting pipe; 19. a fourth connecting pipe; 20. a spool valve assembly; 21. a slider; 211. a groove; 212. a second lumen; 22. a connecting rod; 23. a first stopper; 24. a second stopper; 30. a pilot valve; 31. a first capillary tube; 32. a second capillary tube; 33. a third capillary tube; 34. a fourth capillary tube; 40. a drainage structure; 41. a fixed part; 42. a drainage part; 421. a first baffle plate; 4211. a first end face; 4212. a second end face; 422. a second baffle; 4221. a third end face; 4222. a fourth end surface.

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 10, the reversing valve 100 according to the present invention is applied to a refrigeration system for switching between different pipelines. In this embodiment, the directional valve 100 is a four-way directional valve 100, and in other embodiments, the directional valve 100 may also be a five-way directional valve, a six-way directional valve, or other types of directional valves.

Referring to fig. 1 to 5, the reversing valve 100 includes a valve body 10 and a spool assembly 20, wherein the valve body 10 has a valve seat 11 therein, the spool assembly 20 is partially disposed on the valve seat 11, the valve body 10 has a first inner cavity 102, the spool assembly 20 is disposed in the first inner cavity 102, and the spool assembly 20 is capable of sliding in the first inner cavity 102.

Specifically, the valve body 10 is provided with a first connection port 12, and the first connection port 12 is communicated with the first inner cavity 102. It should be noted that in the present embodiment, the first connection port 12 is a high-pressure port, i.e. a "D" port, and is connected to a discharge port of a compressor (not shown) in the refrigeration system, and in other embodiments, other devices may be connected to the first connection port 12 according to different uses of the reversing valve 100.

The valve body 10 is opened with a plurality of communication ports 101, the plurality of communication ports 101 respectively penetrate through the valve seat 11, and the spool valve assembly 20 slides within the valve body 10 to selectively communicate the different communication ports 101. In the present embodiment, the communication port 101 includes the second connection port 13, the third connection port 14, and the fourth connection port 15, and the second connection port 13, the third connection port 14, and the fourth connection port 15 are provided on the valve body 10 on the side opposite to the first connection port 12. The first connection port 12 is connected to a first connection pipe 16, the second connection port 13 is connected to a second connection pipe 17, the third connection port 14 is connected to a third connection pipe 18, and the fourth connection port 15 is connected to a fourth connection pipe 19.

The second connection pipe 17 is connected to an evaporator (not shown) in the refrigeration system, that is, the second connection port 13 is an "E" port, the third connection pipe 18 is connected to a suction port of the compressor, the third connection port 14 is an "S" port, and the fourth connection pipe 19 is connected to a condenser (not shown), that is, the fourth connection port 15 is a "C" port. In other embodiments, the valve body 10 may further be provided with a fifth connection port, the fifth connection port is connected to a fifth connection pipe, the fifth connection pipe is connected to another heat exchanger, the first connection pipe 16 or another position according to different uses of the reversing valve 100, and the valve body 10 may further be provided with another connection port.

The slide valve assembly 20 comprises a slide block 21 and a connecting rod 22, the slide block 21 is fixed on the connecting rod 22, a groove 211 is formed in one side, away from the first connecting port 12, of the slide block 21, the groove 211 and the valve seat 11 form a second inner cavity 212, the second inner cavity 212 can be communicated with the second connecting port 13 and the third connecting port 14, or the second inner cavity 212 can be communicated with the third connecting port 14 and the fourth connecting port 15, and the first inner cavity 102 and the second inner cavity 212 are always isolated and not communicated.

The slide valve assembly 20 further includes a first stopper 23 and a second stopper 24, and the first stopper 23 and the second stopper 24 are respectively fixed at two ends of the connecting rod 22 and used for axially limiting the slide block 21. In the present invention, the medium refers to a refrigerant.

In this embodiment, when the refrigeration system is in the refrigeration mode, the first stopper 23 abuts against the side wall of the inner cavity, the second connection port 13 and the second inner cavity 212 communicate with the third connection port 14, and the first connection port 12 communicates with the fourth connection port 15 through the first inner cavity 102; when the refrigeration system needs to be switched to the heating mode, the sliding valve assembly 20 slides, the second stopper 24 abuts against the side wall of the first inner cavity 102, the third connecting port 14 and the second inner cavity 212 are communicated with the fourth connecting port 15, and the first connecting port 12 is communicated with the second connecting port 13 through the first inner cavity 102.

Referring to fig. 3 to 5, the directional valve 100 further includes a pilot valve 30, and the pilot valve 30 is disposed on the valve body 10 for driving the sliding valve assembly 20 to slide. The valve body 10 has end caps 103 at two ends, one of the end caps 103 and the first stopper 23 form a first end cap chamber 1031, and the other end cap 103 and the second stopper 24 form a second end cap chamber 1032. The pilot valve 30 is provided with a first capillary 31, a second capillary 32, a third capillary 33 and a fourth capillary 34, the first capillary 31 is communicated with the first connecting pipe 16, the second capillary 32 is communicated with the first end cover chamber 1031, the third capillary 33 is communicated with the third connecting pipe 18, and the fourth capillary 34 is communicated with the second end cover chamber 1032. When the refrigeration system is in a heating mode and needs to be switched, the pilot valve 30 is reversed to enable the first capillary tube 31 to be communicated with the fourth capillary tube 34, the high-pressure medium enters the fourth capillary tube 34 from the first capillary tube 31 and then enters the cavity of the second end cover 103 to push the second stop block 24, so that the sliding valve assembly 20 slides, at the moment, the fourth connecting tube 19 is communicated with the first connecting tube 16, and the third connecting tube 18 is communicated with the second connecting tube 17, so that the reversing is realized.

In the existing reversing valve, when the reversing valve is reversed, because the first connecting port is connected with the exhaust port of the compressor, the pressure is higher, the sliding block is subjected to the pressure of high-pressure airflow in the sliding process, particularly the pressure of the part of the sliding block which is positioned right below the first connecting port is the highest, the friction force between the sliding block and the valve seat can be increased, and the noise is generated.

Referring to fig. 6 to 10, in the present invention, the flow guiding structure 40 is disposed in the valve body 10 at the first connection port 12, the flow guiding structure 40 includes a fixing portion 41 and a flow guiding portion 42 which are connected to each other, the fixing portion 41 is connected to an inner wall of the first connection port 12, a portion of the flow guiding portion 42 extends into the first connection pipe 16, and another portion extends into the valve body 10, due to the blocking of the flow guiding portion 42, the flow velocity of the medium can be reduced, the impact force of the medium on the slider 21 can be reduced, the flow guiding portion 42 guides the high-pressure medium flowing from the first connection pipe 16, the flow direction of the medium can be changed, the forward impact force of the medium on the slider 21 can be reduced, meanwhile, the flow guiding portion 42 can directly guide the medium into the valve body 10, the partial medium does not directly impact the slider 21, the pressure applied to the slider 21 can be further reduced, so as to reduce the friction force between the slider 21 and the valve seat 11, meanwhile, a part of the drainage portion 42 extends into the first connecting pipe 16, so that a drainage flow passage of the drainage portion 42 can be extended, and space is saved.

The fixing portion 41 is annular, the drainage portion 42 is fixed on the inner side wall of the annular fixing portion 41, the outer side wall of the annular fixing portion 41 is abutted to the inner wall of the first connecting pipe 12, and one side of the fixing portion 41 away from the slider 21 is abutted to the end face of the first connecting pipe 16 so as to limit the drainage structure 40. The annular fixing portion 41 is matched with the shape of the first connection port 12, so that the stability of fixing can be enhanced, and the drainage portion 42 cannot incline due to the impact of the high-pressure medium due to the annular fixing portion 41.

One end of the flow guide 42 adjacent to the slider 21 is spaced apart from the surface of the slider 21 adjacent to the first connecting pipe 16 so that the slider 21 can smoothly slide without being blocked.

Drainage portion 42 includes first baffle 421 and second baffle 422 at least, first baffle 421 and second baffle 422 interconnect, the one end orientation that second baffle 422 was kept away from to first baffle 421 extends and stretches into in first connecting pipe 16 the direction of keeping away from the axis of first connecting pipe 16, the one end orientation that first baffle 421 was kept away from to second baffle 422 extends and stretches into first inner chamber 102 towards the direction of keeping away from first baffle 421 and the direction of keeping away from the axis of first connecting pipe 16, that is to say that the axis of drainage portion 42 sets up the axis slope of first connecting pipe 16 relatively. With such an arrangement, the medium flows into the first inner cavity 102 along the flow guiding from the first baffle 421 to the second baffle 422, and meanwhile, the first baffle 421 extends into the first connecting pipe 16, so that the space can be saved. Here, the axis of the drain 42 refers to b in fig. 10.

Further, one end of the first baffle 421, which is far away from the second baffle 422, is spaced from the inner wall of the first connecting pipe 16, and the surface of the second baffle 422, which is far away from the slider 21, is spaced from the inner wall of the first connecting pipe 16, so that the medium can smoothly enter the first inner cavity 102, and the medium can flow into the first inner cavity 102 from a gap between the first baffle 421, which is far away from the second baffle 422, and the inner wall of the first connecting pipe 16, that is, the medium can be divided by the first baffle 421 and flows in multiple strands, so that the medium is dispersed, thereby reducing the pressure, and guiding more medium to the circumferential direction of the slider 21 without directly impacting the slider 21.

The first baffle 421 and the second baffle 422 are both arc-shaped, and the medium can smoothly flow along the first baffle 421 and the second baffle 422.

The arc-shaped first baffle 421 and the arc-shaped second baffle 422 are formed by bending, so that the process is simple.

Example one

Referring to fig. 1 and 6, the inner concave surface of the first baffle 421 is disposed away from the slider 21, and the outer convex surface of the second baffle 422 is disposed away from the slider 21, that is, the first baffle 421 and the second baffle 422 form an "S" shape or a mirror "S" shape, and the outer convex surface of the first baffle 421 and the inner concave surface of the second baffle 422 can form a natural transition, so that the medium can flow smoothly. In this embodiment, the drainage portion 42 includes the first baffle 421 and the second baffle 422, in other embodiments, the drainage portion 42 may further include a third baffle, the third baffle may be an inclined surface or an arc surface, or the drainage portion 42 may further include a third baffle and a fourth baffle, both the third baffle and the fourth baffle are in an arc shape, the inner concave surface of the third baffle is far away from the slider 21, the outer convex surface of the fourth baffle is far away from the slider 21, or the outer convex surface of the third baffle is far away from the slider 21, and the inner concave surface of the fourth baffle is far away from the slider 21.

The radian of the first baffle 421 is 90 degrees, the radian of the second baffle 422 is 90 degrees, the first baffle 421 has a first end surface 4211 and a second end surface 4212 which are oppositely arranged, the second baffle 422 has a third end surface 4221 and a fourth end surface 4222 which are oppositely arranged, the second end surface 4212 is attached to the third end surface 4221, the connecting line of the center of the second end surface 4212 and the center of the first baffle 421 is vertical to the sliding direction of the sliding block 21, and the connecting line of the center of the third end surface 4221 and the center of the second baffle 422 is vertical to the sliding direction of the sliding block 21. With the arrangement, not only can the first baffle 421 and the second baffle 422 be prevented from generating a depression which is not beneficial to the medium flowing, but also the second baffle 422 can guide the medium to be farther away from the sliding block 21.

Example two

Referring to fig. 2 and fig. 10, the structure of the reversing valve 100 of the present embodiment is substantially the same as that of the first embodiment, and the description of the same parts is omitted, where the differences are:

the outer convex surface of the first baffle 421 is far away from the slider 21, the inner concave surface of the second baffle 422 is far away from the slider 21, that is, the first baffle 421 and the second baffle 422 form an "S" shape or a mirror image "S" shape, and the inner concave surface of the first baffle 421 and the outer convex surface of the second baffle 422 can form a natural transition, so that the medium can smoothly flow. In this embodiment, the drainage portion 42 includes the first baffle 421 and the second baffle 422, in other embodiments, the drainage portion 42 may further include a third baffle, the third baffle may be an inclined surface or an arc surface, or the drainage portion 42 may further include a third baffle and a fourth baffle, both the third baffle and the fourth baffle are in an arc shape, the inner concave surface of the third baffle is far away from the slider 21, the outer convex surface of the fourth baffle is far away from the slider 21, or the outer convex surface of the third baffle is far away from the slider 21, and the inner concave surface of the fourth baffle is far away from the slider 21.

The radian of the first baffle 421 is 90 °, the radian of the second baffle 422 is 90 °, the connecting line of the center of the second end surface 4212 and the center of the first baffle 421 is parallel to the sliding direction of the sliding block 21, and the connecting line of the center of the third end surface 4221 and the center of the second baffle 422 is parallel to the sliding direction of the sliding block 21. With the arrangement, not only can the first baffle 421 and the second baffle 422 be prevented from generating a depression which is not beneficial to the medium flowing, but also the second baffle 422 can guide the medium to be farther away from the sliding block 21.

The invention also provides a refrigeration system, which comprises a compressor and the reversing valve 100, wherein the first connecting pipe 16 and the third connecting pipe 18 of the reversing valve 100 are respectively connected with an air outlet and an air inlet of the compressor, the refrigeration system comprises a refrigeration mode and a heating mode, and the reversing valve 100 is used for realizing the switching between the refrigeration mode and the heating mode.

In the working process, when the refrigeration system needs to switch the mode, the slide valve assembly 20 slides, high-pressure medium at the exhaust port of the compressor enters from the first connecting pipe 16 and is blocked and drained by the drainage part 42, so that the flow velocity of the medium can be reduced, the impact force on the sliding block 21 is reduced, the flowing direction of the medium can be changed, part of the medium is drained, the medium falling on the sliding block 21 is reduced, the pressure on the sliding block 21 is reduced, the friction force between the sliding block 21 and the valve seat 11 during sliding is reduced, and the noise is eliminated.

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, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A reversing valve comprises a valve body (10), a valve seat (11) and a sliding block (21), wherein the valve seat (11) and the sliding block (21) are arranged in the valve body (10), the valve body (10) is provided with a first connecting port (12) and a plurality of communicating ports (101), the communicating ports (101) penetrate through the valve seat (11), the sliding block (21) is arranged on the valve seat (11) and can slide in the valve body (10), the first connecting port (12) is provided with a first connecting pipe (16), and a medium can enter the valve body (10) from the first connecting pipe (16);

its characterized in that, the switching-over valve still includes drainage structure (40), drainage structure (40) are located in valve body (10) and lie in first interface (12) department, drainage structure (40) include interconnect's drainage portion (42) and fixed part (41), drainage portion (42) pass through fixed part (41) connect in first interface (12), partly drainage portion (42) stretch into in first connecting pipe (16), partly drainage portion (42) stretch into in valve body (10), the medium warp the drainage of drainage portion (42) gets into in valve body (10).

2. The reversing valve according to claim 1, characterized in that the flow guide (42) comprises at least a first baffle (421) and a second baffle (422) connected to each other, an end of the first baffle (421) remote from the second baffle (422) extends in a direction away from the central axis of the first connecting pipe (16) and away from the slider (21), and an end of the second baffle (422) remote from the first baffle (421) extends in a direction towards the slider (21) and away from the central axis of the first connecting pipe (16).

3. A reversing valve according to claim 2, characterized in that the end of the first flap (421) remote from the second flap (422) is spaced from the inner wall of the first connecting pipe (16), and the surface of the second flap (422) remote from the slide (21) is spaced from the inner wall of the first connecting port (12).

4. The reversing valve according to claim 2, wherein the first stop (421) and the second stop (422) are each arcuate, and wherein the outer convex surface of the first stop (421) is disposed away from the slider (21) and the inner concave surface of the second stop (422) is disposed away from the slider (21).

5. The reversing valve according to claim 4, wherein the arc of the first baffle (421) is 90 °, the arc of the second baffle (422) is 90 °, the first baffle (421) has a second end surface (4212), the second baffle (422) has a third end surface (4221) attached to the second end surface (4212), a line connecting the center of the second end surface (4212) and the center of the first baffle (421) is parallel to the sliding direction of the sliding, and a line connecting the center of the third end surface (4221) and the center of the second baffle (422) is parallel to the sliding direction of the sliding block (21).

6. The reversing valve according to claim 2, wherein the first stop (421) and the second stop (422) are each arcuate, and wherein an inner concave surface of the first stop (421) is disposed away from the slider (21) and an outer convex surface of the second stop (422) is disposed away from the slider (21).

7. The reversing valve according to claim 6, wherein the arc of the first baffle (421) is 90 °, the arc of the second baffle (422) is 90 °, the first baffle (421) has a second end surface (4212), the second baffle (422) has a third end surface (4221) attached to the second end surface (4212), a line connecting the center of the second end surface (4212) and the center of the first baffle (421) is perpendicular to the sliding direction of the sliding, and a line connecting the center of the third end surface (4221) and the center of the second baffle (422) is perpendicular to the sliding direction of the sliding block (21).

8. A reversing valve according to claim 1, characterized in that the flow-inducing portion (42) is spaced from the end of the slider (21) near the first connection opening (12) and the surface of the slider (21) near the first connection opening (12).

9. Reversing valve according to claim 1, characterized in that the fixing part (41) is ring-shaped, the inner side of the ring-shaped fixing part (41) being connected to the flow-inducing part (42), the outer side of the fixing part (41) abutting against the inner wall of the first connection opening (12).

10. A refrigeration system comprising a reversing valve as claimed in any one of claims 1 to 9.