CN113531171B

CN113531171B - One-way valve

Info

Publication number: CN113531171B
Application number: CN202010301431.7A
Authority: CN
Inventors: 杨剑; 康志军; 俞舟
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2023-07-14
Anticipated expiration: 2040-04-16
Also published as: CN113531171A

Abstract

The present invention provides a check valve comprising: a housing; the valve seat is arranged in the shell and is provided with a flow hole; the valve core assembly is movably arranged in the circulation hole in a penetrating way, and comprises a blocking piece and a connecting shaft, wherein the blocking piece is arranged on the connecting shaft, corresponds to the circulation hole and is used for blocking one side of the circulation hole; the reset elastic piece is arranged in the shell and positioned at the other side of the flow hole, is provided with a plurality of bending sections and is in driving connection with the connecting shaft, and is used for resetting the valve core assembly. Through the technical scheme that this application provided, can solve the check valve among the prior art can not satisfy the problem of user demand.

Description

One-way valve

Technical Field

The invention relates to the technical field of one-way valves, in particular to a one-way valve.

Background

Generally, an air conditioner check valve comprises a shell, a valve seat and a valve core, wherein the valve seat and the valve core are arranged in the shell, and the valve core seals a valve port on the valve seat by means of self weight of the valve core. However, in the prior art, since the valve core seals the valve port on the valve seat by its own weight, the valve core needs to be installed vertically in the direction of its own weight, and when the system has a reverse pressure, the installation position cannot be installed vertically in the direction of its own weight, and the compressor will be impacted reversely. Therefore, the problem that the check valve cannot meet the use requirement exists in the prior art.

Disclosure of Invention

The invention provides a one-way valve, which solves the problem that the one-way valve in the prior art cannot meet the use requirement.

The present invention provides a check valve, comprising: a housing; the valve seat is arranged in the shell and is provided with a flow hole; the valve core assembly is movably arranged in the circulation hole in a penetrating way, and comprises a blocking piece and a connecting shaft, wherein the blocking piece is arranged on the connecting shaft, corresponds to the circulation hole and is used for blocking one side of the circulation hole; the reset elastic piece is arranged in the shell and positioned at the other side of the flow hole, is provided with a plurality of bending sections and is in driving connection with the connecting shaft, and is used for resetting the valve core assembly.

Further, the reset spring piece comprises a connecting part and a plurality of supporting legs, the supporting legs are arranged on the connecting part at intervals, the connecting part is connected with the connecting shaft in a driving mode, the supporting legs correspond to the shell or the valve seat, and the bending section is arranged on the supporting legs.

Further, the stabilizer blade has the first section of bending, the second section of bending, the third section of bending and the fourth section of bending of connecting in order, and first section of bending is connected with connecting portion, and the fourth section of bending and the end wall looks butt of disk seat, and first section of bending is towards keeping away from the direction of resetting the shell fragment axis and is buckled, and the second section of bending is towards being close to the direction of resetting the shell fragment axis and is buckled, and third section of bending and fourth section of bending are all buckled towards keeping away from the direction of resetting the shell fragment axis, and the extending direction of fourth section of bending is parallel with the end wall of disk seat.

Further, the connecting shaft is provided with a connecting end and a blocking end which are oppositely arranged, the connecting end of the connecting shaft is connected with the reset elastic sheet, a limiting boss is arranged on the side wall of the connecting shaft, and the blocking piece is sleeved at the blocking end of the connecting shaft and is abutted against the limiting boss.

Further, the plugging end of the connecting shaft is provided with a counter bore, the counter bore and the connecting shaft are coaxially arranged, the upper end face of the plugging piece and the end wall of the plugging end of the connecting shaft are provided with intervals, and the height of the bottom wall of the counter bore is not lower than the upper end face of the plugging piece.

Further, the plugging piece comprises a sealing gasket and a pressing plate, wherein the pressing plate is positioned on one side, far away from the limiting boss, of the sealing gasket, one side of the sealing gasket is abutted against the limiting boss, and the other side of the sealing gasket is abutted against the pressing plate.

Further, the flow hole comprises a first section, a transition section and a second section which are connected in sequence, and the aperture of the first section and the aperture of the second section are gradually increased towards the direction away from the transition section.

Further, the included angle between the hole wall of the first section and the axis of the valve seat is larger than the included angle between the hole wall of the second section and the axis of the valve seat.

Further, the flow hole further comprises a third section, the third section is located at one end of the second section away from the first section, and the aperture of the third section gradually increases towards the direction away from the second section.

Further, one end of the second section, which is far away from the first section, is provided with an annular boss, the annular boss is arranged along the circumferential direction of the second section and surrounds a valve port of the valve seat, and the valve core assembly is arranged corresponding to the annular boss.

Further, be provided with the joint recess on the outer wall of disk seat, the circumference extension of joint recess along the disk seat is provided with first neck that contracts on the casing, and first neck card is established in the joint recess, and the wall thickness department that thickens at the disk seat of joint recess setting.

Further, the check valve also comprises a support frame, the support frame comprises a guide ring and a plurality of connecting rods, one end of each connecting rod is connected with the side wall of the guide ring, the other end of each connecting rod is connected with the shell or the valve seat, the connecting shaft penetrates through the guide ring, and the guide ring and the connecting parts are arranged at intervals.

Further, the check valve also comprises a filter component, the filter component is arranged in the shell and is positioned at the upstream of the valve core component, the filter component comprises a fixing ring and a filter screen, the second necking part and the third necking part are arranged on the shell at intervals, the fixing ring is arranged between the second necking part and the third necking part, and the filter screen is arranged on the fixing ring.

By applying the technical scheme of the invention, the one-way valve comprises a shell, a valve seat, a valve core assembly and a reset spring piece. The valve seat is arranged in the shell, the valve seat is provided with a flow hole, the valve core assembly movably penetrates through the flow hole, the valve core assembly comprises a sealing piece and a connecting shaft, the sealing piece is arranged on the connecting shaft, and the sealing piece corresponds to the flow hole and is used for sealing one side of the flow hole. Through setting up the shell fragment that resets in the casing and be located the opposite side of flow hole, the shell fragment that resets has a plurality of sections of bending, will reset shell fragment and connecting axle drive to be connected, utilizes the shell fragment that resets to reset to the case subassembly, so when installing the check valve, need not to consider the installation direction of check valve, the check valve can satisfy the user demand.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows an exploded view of a one-way valve provided in accordance with an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of the reset spring in fig. 1;

FIG. 3 is a schematic view of a reset spring in FIG. 1;

FIG. 4 shows a schematic structural view of the connecting shaft of FIG. 1;

FIG. 5 shows a cross-sectional view of the connecting shaft of FIG. 1;

FIG. 6 shows a cross-sectional view of the platen of FIG. 1;

FIG. 7 shows a schematic structural view of the valve seat of FIG. 1;

FIG. 8 shows a cross-sectional view of the valve seat of FIG. 1;

FIG. 9 is a schematic view showing the structure of the support frame in FIG. 1;

FIG. 10 shows a schematic view of a check valve provided in accordance with an embodiment of the present invention in a closed state;

fig. 11 shows a schematic view of a check valve provided according to an embodiment of the present invention in an open state.

Wherein the above figures include the following reference numerals:

10. a housing; 11. a first necked portion; 12. a second necked portion; 13. a third necked portion;

20. a valve seat; 21. a flow hole; 211. a first section; 212. a transition section; 213. a second section; 214. a third section; 215. an annular boss; 22. a clamping groove;

30. a valve core assembly; 31. a blocking member; 311. a sealing gasket; 312. a pressing plate; 32. a connecting shaft; 321. a connection end; 322. plugging the end; 323. a limit boss; 324. countersink;

40. resetting the spring plate; 41. a connection part; 42. a support leg; 421. a first bending section; 422. a second bending section; 423. a third bending section; 424. a fourth bending section;

50. a support frame; 51. a guide ring; 52. a connecting rod;

60. a filter assembly; 61. a fixing ring; 62. and (3) a filter screen.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 11, the embodiment of the present invention provides a check valve including a housing 10, a valve seat 20, a valve body assembly 30, and a return spring 40, the valve seat 20 being disposed in the housing 10, the valve seat 20 having a through-hole 21 through which a medium can flow through the check valve. Wherein, the valve core assembly 30 is movably arranged in the circulation hole 21 in a penetrating way, and the valve core assembly 30 is used for opening or blocking the circulation hole 21. Specifically, the valve cartridge assembly 30 includes a blocking member 31 and a connecting shaft 32, the blocking member 31 being disposed on the connecting shaft 32, the blocking member 31 being disposed corresponding to the flow hole 21 and for blocking one side of the flow hole 21. In this embodiment, the reset spring 40 is disposed in the housing 10 and located at the other side of the flow hole 21, the reset spring 40 has a plurality of bending sections, the reset spring 40 is in driving connection with the connecting shaft 32, the valve core assembly 30 can be reset by using the reset spring 40, no matter in which installation direction the check valve is located, and the valve core assembly 30 can be reset under the action of the reset spring 40.

By using the check valve provided by the embodiment, the reset spring 40 is in driving connection with the connecting shaft 32 of the valve core assembly 30, and the installation direction of the check valve is not required to be considered when the check valve is installed, and the valve core assembly 30 can reset under the action of the reset spring 40, so that the compressor can be prevented from being impacted reversely, and the use requirement of the check valve can be met. And, reset shell fragment 40 has a plurality of sections of bending, through setting up a plurality of sections of bending, can utilize a plurality of sections of bending to provide the elastic force simultaneously, be convenient for control reset shell fragment 40's elastic force, and then be convenient for control check valve's stroke and precision.

As shown in fig. 2 and 3, the reset spring 40 includes a connecting portion 41 and a plurality of legs 42, and the plurality of legs 42 are disposed on the connecting portion 41 at intervals, so that the plurality of legs 42 can be utilized to support the reset spring 40 at the same time, and the stability of the reset spring 40 can be improved. Specifically, the connecting portion 41 is in driving connection with the connecting shaft 32, the leg 42 is provided corresponding to the housing 10 or the valve seat 20, and the bending section is provided on the leg 42. In the present embodiment, the leg 42 abuts against the valve seat 20 to fix and support the return spring 40. In other embodiments, the legs 42 may be coupled to the housing 10 to effect securement of the reset spring 40. In the present embodiment, the reset spring 40 includes four legs 42, so that stability of the reset spring 40 and the valve core assembly 30 can be ensured. In other embodiments, the number of legs 42 may be adjusted in a targeted manner, preferably to ensure that the number of legs 42 is three or more.

The connection portion 41 has a circular ring structure, and the connection shaft 32 is inserted into the connection portion 41 and connected to the connection portion 41. Specifically, the connection portion 41 and the connection shaft 32 may be connected by welding, caulking, fastening, or the like.

Specifically, the leg 42 has a first bending section 421, a second bending section 422, a third bending section 423, and a fourth bending section 424, which are sequentially connected, the first bending section 421 is connected to the connecting portion 41, and the fourth bending section 424 abuts against the end wall of the valve seat 20. The first bending section 421 is bent in a direction away from the axis of the reset spring 40, the second bending section 422 is bent in a direction close to the axis of the reset spring 40, the third bending section 423 and the fourth bending section 424 are both bent in a direction away from the axis of the reset spring 40, and an extending direction of the fourth bending section 424 is parallel to an end wall of the valve seat 20. By adopting the structure, the four bending sections are arranged, so that the elastic deformation of the reset elastic sheet 40 is conveniently controlled, the deformation amount of the supporting leg 42 is conveniently controlled, and the stroke of the valve core assembly 30 is conveniently controlled. In addition, the manner of providing a plurality of bending sections can improve the service life of the reset spring 40 compared with the manner of providing only one or two bending sections. In actual operation, the bending angle can be determined according to the required elasticity of the elastic sheet and the thickness and the material of the elastic sheet.

As shown in fig. 4 and 5, the connecting shaft 32 has a connecting end 321 and a blocking end 322 that are disposed opposite to each other, and the connecting end 321 of the connecting shaft 32 is connected to the reset spring 40, so as to connect the valve core assembly 30 to the reset spring 40. In order to facilitate assembly of the plugging piece 31, a limiting boss 323 is arranged on the side wall of the connecting shaft 32, and the plugging piece 31 is sleeved at the plugging end 322 of the connecting shaft 32 and is abutted against the limiting boss 323. In this embodiment, one end of the limiting boss 323 facing the plugging piece 31 is a plane, and the plugging piece 31 is attached to the plane, so that stability of the plugging piece 31 on the connecting shaft 32 can be ensured.

The plugging end 322 of the connecting shaft 32 is provided with a counter bore 324, the counter bore 324 and the connecting shaft 32 are coaxially arranged, and the plugging piece 31 can be fixed in a riveting mode. Specifically, the upper end surface of the plugging member 31 is spaced from the end wall of the plugging end 322 of the connecting shaft 32, and the bottom wall of the counter bore 324 is not lower than the upper end surface of the plugging member 31, so that when the plugging end 322 is riveted, the outer diameter of the counter bore 324 is deformed, and the plugging member 31 can be expanded at the plugging end 322 of the connecting shaft 32 by using the outer wall of the counter bore 324.

In this embodiment, the plugging member 31 includes a sealing pad 311 and a pressing plate 312, the pressing plate 312 is located on one side of the sealing pad 311 away from the limiting boss 323, one side of the sealing pad 311 abuts against the limiting boss 323, and the other side of the sealing pad 311 abuts against the pressing plate 312. With the structure, the sealing pad 311 can be pressed on the limiting boss 323 by the pressing plate 312, so that the sealing performance of the device can be ensured.

As shown in fig. 7 and 8, the flow hole 21 includes a first section 211, a transition section 212, and a second section 213 connected in sequence, and the aperture of each of the first section 211 and the aperture of the second section 213 gradually increases in a direction away from the transition section 212. By providing the first and second horn-shaped

sections

211 and 213, the flow rate of the flow hole 21 can be increased. Wherein the inner wall of the transition section 212 is a smooth curved surface.

In the present embodiment, the included angle between the hole wall of the first section 211 and the axis of the valve seat 20 is larger than the included angle between the hole wall of the second section 213 and the axis of the valve seat 20, so that the flow capacity of the flow hole 21 can be further improved.

To further enhance the flow rate of the one-way valve, the flow hole 21 further includes a third section 214, the third section 214 is located at an end of the second section 213 away from the first section 211, and the aperture of the third section 214 gradually increases toward a direction away from the second section 213.

As shown in fig. 8, an annular boss 215 is disposed at an end of the second section 213 away from the first section 211, the annular boss 215 is disposed along a circumferential direction of the second section 213 and encloses a valve port of the valve seat 20, and the valve core assembly 30 is disposed corresponding to the annular boss 215. By providing the annular boss 215, the valve core assembly 30 is in line-surface contact with the valve seat 20 through the annular boss 215, and the sealing effect can be improved. In other embodiments, the annular boss 215 may not be provided and the valve core assembly 30 may be used to seal in face-to-face contact with the valve seat 20.

In order to be convenient for fix disk seat 20, be provided with joint recess 22 on the outer wall of disk seat 20, joint recess 22 extends along the circumference of disk seat 20, is provided with first neck portion 11 on the casing 10, and first neck portion 11 card is established in joint recess 22, and joint recess 22 sets up the thickest department of wall thickness at disk seat 20. By providing the catching groove 22 at the thickest wall thickness of the valve seat 20, the strength of the valve seat 20 can be ensured while achieving fixation of the valve seat 20.

As shown in fig. 9, the check valve further includes a supporting frame 50, the supporting frame 50 is fixed on the housing 10 or the valve seat 20, the connecting shaft 32 of the valve core assembly 30 is movably inserted into the supporting frame 50, and the supporting frame 50 can guide the valve core assembly 30. Specifically, the support frame 50 includes a guide ring 51 and a plurality of connecting rods 52, one end of each connecting rod 52 is connected with a side wall of the guide ring 51, the other end of each connecting rod 52 is connected with the housing 10 or the valve seat 20, the connecting shaft 32 is arranged in the guide ring 51 in a penetrating manner, and the guide ring 51 and the connecting portion 41 are arranged at intervals to ensure concentricity of the valve core assembly 30. In this embodiment, the support bracket 50 includes four connecting rods 52, each connecting rod 52 being connected to an end wall of the valve seat 20. The four supporting legs 42 and the four connecting rods 52 are staggered, and the ends of the four supporting legs 42 and the four connecting rods 52 are located on the same plane and correspond to the ends of the valve seat 20.

As shown in fig. 1 and 10, the check valve further includes a filter assembly 60, where the filter assembly 60 is disposed in the housing 10 and upstream of the valve core assembly 30, and the filter assembly 60 is used to filter the medium to avoid blocking the check valve. Specifically, the filter assembly 60 includes a fixing ring 61 and a filter screen 62, the second neck portion 12 and the third neck portion 13 are disposed on the housing 10 at intervals, the fixing ring 61 is disposed between the second neck portion 12 and the third neck portion 13, and the filter screen 62 is disposed on the fixing ring 61.

As shown in fig. 10 and 11, when the check valve is assembled, the check valve is opened and, conversely, closed when the fluid pressure is greater than the elastic force of the return spring 40 plus the self weight of the valve core assembly 30. The check valve can be reversely arranged, at the moment, the self weight of the fluid pressure valve core assembly 30 is larger than the elastic force of the reset elastic sheet 40, and the check valve is opened, otherwise, the check valve is closed. And, when the check valve is opened, the pressing plate 312 of the valve core assembly 30 is not higher than the beginning of the shrinkage tube of the shell 10.

In this embodiment, the housing 10 is a copper tube.

By the device provided by the embodiment, the one-way valve is not limited by the installation direction, and the system reverse pressure can be effectively prevented from impacting the compressor in any installation direction. And, through integrating the check valve with the filter assembly 60, the whole product is small and exquisite, and weight is lighter, simple to operate.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way valve, the one-way valve comprising:

a housing (10);

a valve seat (20) provided in the housing (10), the valve seat (20) having a flow hole (21);

the valve core assembly (30) is movably arranged in the circulation hole (21) in a penetrating mode, the valve core assembly (30) comprises a blocking piece (31) and a connecting shaft (32), the blocking piece (31) is arranged on the connecting shaft (32), and the blocking piece (31) is arranged corresponding to the circulation hole (21) and used for blocking one side of the circulation hole (21);

reset shell fragment (40) are in setting up in casing (10) and are located the opposite side of circulation hole (21), reset shell fragment (40) are used for right case subassembly (30) reset, reset shell fragment (40) are including connecting portion (41) and a plurality of stabilizer blade (42), and a plurality of stabilizer blade (42) interval sets up on connecting portion (41), connecting portion (41) with connecting axle (32) drive connection, stabilizer blade (42) correspond casing (10) or disk seat (20) set up, every all be provided with a plurality of bending sections on stabilizer blade (42).

2. The one-way valve according to claim 1, characterized in that the leg (42) has a first bending section (421), a second bending section (422), a third bending section (423) and a fourth bending section (424) connected in sequence, the first bending section (421) is connected with the connecting portion (41), the fourth bending section (424) abuts against an end wall of the valve seat (20), the first bending section (421) is bent in a direction away from an axis of the return spring (40), the second bending section (422) is bent in a direction close to the axis of the return spring (40), the third bending section (423) and the fourth bending section (424) are both bent in a direction away from the axis of the return spring (40), and an extending direction of the fourth bending section (424) is parallel to the end wall of the valve seat (20).

3. The one-way valve according to claim 1, wherein the connecting shaft (32) has a connecting end (321) and a blocking end (322) which are oppositely arranged, the connecting end (321) of the connecting shaft (32) is connected with the reset spring (40), a limiting boss (323) is arranged on the side wall of the connecting shaft (32), and the blocking piece (31) is sleeved on the blocking end (322) of the connecting shaft (32) and is abutted against the limiting boss (323).

4. A one-way valve according to claim 3, characterized in that the blocking end (322) of the connecting shaft (32) is provided with a counter bore (324), the counter bore (324) is coaxially arranged with the connecting shaft (32), the upper end face of the blocking member (31) is spaced from the end wall of the blocking end (322) of the connecting shaft (32), and the bottom wall of the counter bore (324) is not lower than the upper end face of the blocking member (31).

5. A one-way valve according to claim 3, wherein the blocking member (31) comprises a sealing pad (311) and a pressing plate (312), the pressing plate (312) being located on a side of the sealing pad (311) remote from the limiting boss (323), one side of the sealing pad (311) being in abutment with the limiting boss (323), the other side of the sealing pad (311) being in abutment with the pressing plate (312).

6. A one-way valve according to claim 1, characterized in that the flow-through hole (21) comprises a first section (211), a transition section (212) and a second section (213) connected in sequence, the pore size of the first section (211) and the pore size of the second section (213) each increasing gradually in a direction away from the transition section (212).

7. A one-way valve according to claim 6, characterized in that the angle between the wall of the first section (211) and the axis of the valve seat (20) is greater than the angle between the wall of the second section (213) and the axis of the valve seat (20).

8. The one-way valve according to claim 6, wherein the flow-through hole (21) further comprises a third section (214), the third section (214) being located at an end of the second section (213) remote from the first section (211), the aperture of the third section (214) gradually increasing in a direction away from the second section (213).

9. The one-way valve according to claim 6, wherein an end of the second section (213) remote from the first section (211) is provided with an annular boss (215), the annular boss (215) being disposed along a circumferential direction of the second section (213) and surrounding a valve port of the valve seat (20), and the valve element assembly (30) being disposed corresponding to the annular boss (215).

10. The one-way valve according to claim 1, wherein a clamping groove (22) is formed in an outer wall of the valve seat (20), the clamping groove (22) extends along a circumferential direction of the valve seat (20), a first neck-shrinking portion (11) is formed in the housing (10), the first neck-shrinking portion (11) is clamped in the clamping groove (22), and the clamping groove (22) is formed in a thickest wall thickness of the valve seat (20).

11. The one-way valve according to claim 1, further comprising a supporting frame (50), wherein the supporting frame (50) comprises a guide ring (51) and a plurality of connecting rods (52), one ends of the connecting rods (52) are connected with the side wall of the guide ring (51), the other ends of the connecting rods (52) are connected with the shell (10) or the valve seat (20), the connecting shaft (32) is arranged in the guide ring (51) in a penetrating manner, and the guide ring (51) and the connecting part (41) are arranged at intervals.

12. The one-way valve according to claim 1, further comprising a filter assembly (60), the filter assembly (60) being disposed within the housing (10) and upstream of the valve core assembly (30), the filter assembly (60) comprising a retainer ring (61) and a filter screen (62), the housing (10) being provided with a second neck (12) and a third neck (13) at a distance therefrom, the retainer ring (61) being disposed between the second neck (12) and the third neck (13), the filter screen (62) being disposed on the retainer ring (61).