CN217842804U - Check valve and filter component - Google Patents

Abstract

An embodiment of this application realizes the filtration of impurity among the working medium through installation filtering component on the check valve, and filtering component can dismantle with the valve core case and be connected in addition, realizes filtering component's removable, is favorable to reduce cost.

Description

Check valve and filter component

Technical Field

The application relates to the technical field of fluid management, in particular to a one-way valve and a filtering component.

Background

In air conditioning systems, a check valve is one of the common components installed in a passage that allows one-way flow. The valve can be used for preventing the refrigerant from flowing reversely in the air conditioning system, assisting other valve products to complete the switching of different working modes of the system and the like.

Among the current check valve, in order to reduce the impurity circulation in the medium, can set up filter element in the valve body, filter element usually with valve body structure, or fixed mounting on the valve body, the difficult clean up of impurity on the filter element, when consequently needing clearance valve body internal impurity, can directly change the valve body usually, the cost is higher relatively.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a check valve and filter component, conveniently change filter component, help reduce cost.

In order to achieve the purpose, the following technical scheme is adopted in the application: a check valve comprises a valve core seat, a valve core component and a filtering component, wherein the check valve is provided with a cavity, at least part of the valve core component is positioned in the cavity, the check valve is provided with a valve port, and the valve core component can open or close the valve port;

the one-way valve includes a fluid passage capable of communicating with the cavity, the filter element is removably connected to the valve cartridge, and the filter element includes a portion of a wall forming the fluid passage.

In another aspect, another embodiment of the present application provides a filter member for the above one-way valve, the filter member being detachably connected to the one-way valve.

This application is through installing filter component on the check valve, realizes the filtration of impurity among the working medium, and filter component can dismantle with the valve core case and be connected in addition, realizes filter component's removable, is favorable to reduce cost.

Drawings

FIG. 1 is a schematic perspective view of a check valve according to a first embodiment;

FIG. 2 is a schematic cross-sectional view of a first embodiment and a second embodiment of the check valve;

FIG. 3 is a cross-sectional schematic view of the valve cartridge seat;

FIG. 4 is an enlarged view of FIG. 2 at A;

FIG. 5 is a schematic perspective view of a third embodiment of the check valve;

FIG. 6 is a schematic perspective view of a fourth embodiment of the check valve;

FIG. 7 is a schematic perspective view of a fifth embodiment of the check valve;

FIG. 8 is a schematic perspective view of a filter element in a sixth embodiment of a check valve;

FIG. 9 is an enlarged view of FIG. 8 at B;

FIG. 10 is a schematic perspective view of a sixth embodiment of the check valve;

FIG. 11 is an enlarged view of FIG. 10 at C;

FIG. 12 is a cross-sectional schematic view of a sixth lobe and valley configuration of a one-way valve embodiment.

1. A one-way valve; 10. a valve core seat; 101. a connecting portion; 102. a second opening portion; 103. a first opening portion; 11. a cavity; 12. a valve port portion; 121. a valve port; 13. a fluid channel; 131. a first channel; 132. a second channel; 14. an inflow channel; 15. an outflow channel; 20. a valve core component; 21. sealing the cover; 22. a valve core; 23. a valve stem; 24. an elastic member; 30. a filter member; 31. a filtration channel; 32. a wall portion; 321. a connecting end; 322. an extension end; 323. a first wall; 324. a second wall; 325. a third wall; 326. a fourth wall; 327. a fifth wall; 328. a sixth wall; 329. a transition wall; 40. a storage area;

50. a convex portion; 501. a first clamping part; 5011. a first end; 5012. a second end; 502. a second clamping part; 60. a recess; 601. a first groove portion; 6011. a first groove; 602. a second groove portion; 6021. a second groove; 61. a second opening; 611. a guide wall; 62. intersecting lines; 63. an arc surface portion; 631. a first arc surface portion; 632. a second arc surface portion.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

the first embodiment is as follows:

referring to fig. 1 and fig. 2, a check valve 1 includes a valve core seat 10, a valve core component 20 and a filter component 30, the check valve 1 has a cavity 11 and a fluid channel 13, at least a part of the valve core component 20 is located in the cavity 11, the check valve 1 has a valve port 121, the fluid channel 13 includes an inlet channel 14 and an outlet channel 15, and the valve core component 20 can open or close the valve port 121 so as to connect or disconnect the inlet channel 14 and the outlet channel 15;

the filter component 30 is fixedly connected or in limited connection or in an integrated structure with the valve core seat 10, the check valve 1 comprises a wall portion 32, and the wall portion 32 is fixedly connected or in limited connection or in an integrated structure with the valve core seat 10;

the filter element 30 is located in the inlet channel 14, and the wall 32 is away from the valve port 121 relative to the filter element 30; and/or filter element 30 is located in outflow channel 15, wall 32 being adjacent to valve port 121 with respect to filter element 30; the non-return valve 1 has a storage area 40, at least part of the storage area 40 being located between the wall portion 32 and the filter element 30, the walls forming the storage area 40 comprising part of the wall portion 32 and the wall of the filter element 30.

The working steps of this embodiment are: the working medium enters the cavity 11 from the inlet channel 14, when the filter element 30 is located in the inlet channel 14, impurities in the working medium are left on the side of the filter element 30 away from the valve port 121, and finally most of the impurities are left in the storage area 40; when the filter element 30 is located in the outflow channel 15, impurities in the working medium remain on the side of the filter element 30 close to the valve port 121, and the impurities are collected in the storage area 40. When the valve port 121 is opened or closed by the valve body member 20, even if the pressure difference in the cavity 11 changes, the foreign substances are not easily released from the storage area 40, and therefore, the provision of the wall portion 32 improves the capability of collecting the foreign substances.

The second embodiment:

referring to fig. 2 and 3, the fluid passage 13 includes a first passage 131 and a second passage 132, the first passage 131 and the second passage 132 communicate with the cavity 11, and the first passage 131 and the second passage 132 are sequentially arranged in a direction in which the spool member 20 opens the valve port 121. The check valve 1 includes a valve port 12, the valve port 12 is disposed in a reduced manner along a direction in which the valve core 20 closes the valve port 121, the valve port 121 is located at the valve port 12, and along an axial direction of the valve core seat 10, at least a portion of the first channel 131 is located at one side of the valve port 121, and at least a portion of the second channel 132 is located at the other side of the valve port 121.

The spool member 20 includes a cover 21, a spool 22, a stem 23, and an elastic member 24, the spool seat 10 includes a first opening portion 103, the first opening portion 103 is opposite to the first channel 131, and the cover 21 covers an opening formed by the first opening portion 103. The cover 21 is fixed to the valve core seat 10 in a clamping manner, so as to form a relatively stable connection state without relative movement, and in other embodiments, the connection mode between the cover 21 and the valve core seat 10 may also be a fixed connection mode or other limit connection modes. One end of the valve rod 23 is integrally formed with the valve core 22, the other end penetrates into the sealing cover 21, and the valve rod 23 is slidably connected to the sealing cover 21 along the axial direction of the valve rod 23. In other embodiments, the valve rod 23 and the valve core 22 may be fixedly connected by other methods such as welding. The spool 22 is located in the cavity 11, and the spool 22 includes a first groove and a second groove, and the first groove is located on an end surface of the spool 22 on a side away from the stem 23. The second groove is located on the end face of the spool 22 on the side close to the valve rod 23, and the valve rod 23 is fixedly connected to the bottom wall of the second groove. One end of the elastic element 24 abuts against the bottom wall of the second groove, the other end abuts against the sealing cover 21, the elastic element 24 enables the valve core 22 to close the valve port 121 along the axial direction thereof, the direction for closing the valve core 22 to close the valve port 121 is defined as a first direction, and when the valve port 121 is closed, the valve core 22 always has an acting force in the first direction on the valve core seat 10, so that the valve core 22 abuts against the wall of the valve port 121. In the present embodiment, the elastic member 24 is a compression spring. The first direction here means from top to bottom in the direction of the reference axis.

The first channel 131 is the inlet channel 14, the second channel 132 is the outlet channel 15, the check valve 1 includes a wall 32, the wall 32 and the filter element 30 are located in the second channel 132 or on a side of the second channel 132 opposite to the valve port 121, and the filter element 30 is located on a side of the wall 32 opposite to the chamber 11. The wall 32 is integrally formed with the valve seat 10, but in other embodiments, the wall 32 and the valve seat 10 may be fixedly connected or connected in a limited manner. The valve core seat 10 includes a connecting portion 101, at least a portion of the connecting portion 101 is located on the cover 21, and one side of the connecting portion 101 is connected to the cover 21 and the other side is fixedly connected to the wall portion 32. The check valve 1 includes a second opening portion 102, a wall forming the second opening portion 102 includes a wall of a partial connection portion 101 and a wall of a partial wall portion 32, the second opening portion 102 forms a groove penetrating from inside to outside, the second opening portion 102 is uniformly arranged around the valve core seat 10 at intervals in the circumferential direction, a wall of the fluid channel 13 includes a wall of a partial second opening portion 102, it should be noted that an area of the second opening portion 102 through which the working medium can flow is greater than or equal to a flow rate of the valve port 121, and the definition of inside and outside is defined by referring to the valve core seat 10.

With reference to fig. 2 and 4, the non-return valve 1 has a storage area 40, the storage area 40 being located between the wall 32 and the filter element 30. The wall 32 has a connecting end 321 and an extending end 322, in order to ensure the strength of the wall 32, the thickness of the connecting end 321 should be between 1mm and 3mm, the wall 32 is connected to the valve core seat 10 through the connecting end 321, the extending end 322 extends towards the axial direction of the valve core seat 10 relative to the connecting end 321, the axial direction of the valve core seat 10 is defined as a reference axis, and the wall 32 is disposed around the reference axis. When the valve body 20 closes the valve port 121, the impurity in the storage area 40 tends to move toward the inlet side due to the difference in the valve internal pressure, and the wall portion 32 provided around can directly block the escape of the impurity.

The wall portion 32 includes a first wall 323 and a second wall 324, the first wall 323 is opposite to the filter element 30, and the distance between the first wall 323 and the filter element 30 is L1, and L1 is greater than or equal to 1mm for better storing impurities. The second wall 324 is located at the extended end 322, and the second wall 324 faces the filter member 30, and the second wall 324 is closer to the filter member 30 than the first wall 323 along the radial direction of the valve core seat 10, and the storage area 40 has a first opening, and the wall forming the first opening includes a part of the first wall 323 and the second wall 324. The extension end 322 of the wall portion 32 forms a flat surface projecting toward the filter element 30 side, but a gap is provided between the second wall 324 and the filter element 30, and the distance between the second wall 324 and the filter element 30 is L2, for example, the maximum particle diameter of the system is 0.5mm and the minimum l2 is more than 0.5mm as determined by experiments, but in order to improve the effect of storing impurities, 0.5 ≦ L2 ≦ 1mm, and preferably, L2 is 0.75mm.

The working medium is guided out from the outflow channel 15, when passing through the filter element 30, a part of the working medium flows into the storage area 40, and meets the fifth wall 327 after flowing into the storage area 40, and a majority of the working medium flows out from the filter element 30 in the storage area 40, but a part of the working medium is diverted to the side of the first wall 323, and after meeting the first wall 323, the diverted working medium continues to flow until meeting the protruding part of the extension end 322, and is flowed by the working medium flowing into the storage area 40 from the cavity 11. And the impurities in the working medium collide with the protruding portion of the extension end 322 and then fall back to the bottom of the storage area 40. Therefore, the extension portion is provided with a protruding portion toward the filter element 30, which can reduce the backflow of the working medium and prevent the impurities from escaping.

The wall section 32 comprises a third wall 325, which third wall 325 adjoins the first wall 323 on one side and the second wall 324 on the other side, the third wall 325 and the first wall 323 having an angle epsilon, preferably epsilon, which is larger than or equal to 90 deg., and the third wall 325 can provide a better guiding effect for the flow distribution when the angle between the first wall 323 and the third wall 325 is obtuse, while at the same time it can block most of the impurities escaping upwards. If epsilon is an acute angle, the working medium is diverted from the fifth wall 327 toward the first wall 323, and after the diverted flow meets the first wall 323 and the third wall 325, the diverted flow flows along the third wall 325 due to the acute angle between the first wall 323 and the third wall 325, and has a tendency to flow back to the fifth wall 327, so that the content of the storage area 40 under this structure is easy to form a backflow, and in addition, the demolding is easier when the first wall 323 and the third wall 325 form an obtuse angle or a right angle with respect to the processing technology.

The wall portion 32 includes a fourth wall 326, the fourth wall 326 is located at the extended end 322, the fourth wall 326 is away from the valve port 121 relative to the first wall 323, and the wall defining the second opening portion 102 includes a portion of the fourth wall 326. The valve core seat 10 includes a fifth wall 327, the fifth wall 327 is located in the second channel 132, the connecting end 321 of the wall 32 and the fifth wall 327 are integrally structured, the planes of the fifth wall 327 and the fourth wall 326 are parallel, and the planes of the fourth wall 326 and the fifth wall 327 are both perpendicular to the reference axis. The walls forming the storage region 40 include a portion of the fifth wall 327. The fifth wall 327 forms an angle β ≧ 90 ° with the first wall 323. In the present embodiment and the drawings, β is a right angle, and in actual use, β includes but is not limited to a right angle. The wall portion 32 further includes a sixth wall 328, and when the spool 22 closes or opens the valve port 121, the spool 22 can slide in the axial direction of the spool 22 with respect to the sixth wall 328, and the sixth wall 328 serves to guide the movement of the spool 22.

The walls forming the fluid passage 13 include a partial wall of the second passage 132, a fourth wall 326 and a fifth wall 327, the fluid passage 13 includes a filtering passage 31, the filtering passage 31 is composed of filtering holes of a plurality of filtering members 30, and the filtering passage 31 communicates with the second passage 132. The storage area 40 formed by the fifth wall 327, the first wall 323, the third wall 325 and the filter element 30 can contain impurities which cannot pass through the filter element 30, when the working medium is led out from the outflow channel 15, most of the medium is left on the side of the filter element 30 close to the valve core element 20, and after the internal and external pressure difference of the valve disappears, the impurities fall into the storage area 40 due to gravity for temporary storage, so that subsequent cleaning is facilitated.

The check valve 1 includes a transition wall 329, one side of the transition wall 329 is connected with the wall of the valve port portion 12, one side is connected with the joint of the wall portion 32 and the fifth wall 327, and the transition wall 329 is an arc-shaped wall protruding toward one side of the valve core 22. When the working medium enters the cavity 11 from the first channel 131, the working medium passes through the flared valve port 12 to play a role of speed reduction and is led out by the transition wall 329, so that the impact on the wall 32 can be reduced.

When a pressure difference exists between the inside and the outside of the working check valve 1 in the embodiment, the valve core component 20 opens the valve port 121, the working medium enters the cavity 11 from the inlet channel 14, when the filter component 30 is located in the outlet channel 15, impurities in the working medium are left on one side of the filter component 30 close to the valve port 121 in the process of leading the working medium out from the outlet channel 15, and the impurities are collected in the storage area 40 in a centralized manner. (the arrows in the figure point in the direction of flow of the working medium)

When the impurities need to be cleaned, an axial acting force can be applied to the filtering component 30, the convex part 50 is pulled out from the concave part 60, the filtering component 30 can be detached, and then the impurities in the storage area 40 can be cleaned.

Example three:

the difference between the third embodiment and the second embodiment is that:

referring to fig. 5, the first channel 131 is the inlet channel 14, the second channel is the outlet channel 15, the filter element 30 is connected to the wall of the first channel 131, the wall 32 is connected to the wall of the first channel 131, the filter element 30 is located on the side of the valve portion 12 opposite to the valve portion 20, and the wall 32 is located on the side of the filter element 30 opposite to the valve portion 12. In other embodiments, the connection mode is not limited to an integral structure or a limit connection, and may be other connection modes with high stability.

The working steps of this embodiment are: when the working medium enters the cavity 11 from the first channel 131, after being filtered by the filter element 30, impurities in the working medium are left on the side of the filter element 30 away from the valve port 121 and are finally stored in the storage area 40. (the arrows in the figure indicate the direction of flow of the working medium)

Example four:

the difference between the fourth embodiment and the third embodiment is that:

referring to fig. 6, the first channel 131 is an outflow channel 15, the second channel 132 is an inflow channel 14, the filter element 30 is connected to the wall of the second channel 132 in a limited manner, the wall 32 is integrated with the wall of the second channel 132, and the wall 32 is located on the side of the filter element 30 away from the valve port 12. It should be noted that, in the present embodiment, the direction in which the spool 22 opens the valve port 121 is opposite to the first direction in the second embodiment. In other embodiments, the connection mode is not limited to an integral structure or a limit connection, and may be other connection modes with high stability.

The working steps of this embodiment are: when the working medium enters the cavity 11 from the second channel 132, after being filtered by the filter element 30, impurities in the working medium are left on the side of the filter element 30 away from the valve port 121 and are finally stored in the storage area 40. (the arrows in the figure indicate the direction of flow of the working medium)

Example five:

the difference between the fifth embodiment and the third embodiment is that:

referring to fig. 7, the first channel 131 is an outlet channel 15, the second channel 132 is an inlet channel 14, the filter element 30 is connected to the wall of the first channel 131, the wall 32 is connected to the wall of the first channel 131, and the wall 32 is located on the side of the filter element 30 close to the valve port 12. It should be noted that, in the present embodiment, the direction in which the valve element 22 opens the valve port 121 is opposite to the first direction in the second embodiment. In other embodiments, the connection mode is not limited to an integral structure or a limit connection, and may be other connection modes with high stability.

The working steps of this embodiment are: when the working medium enters the chamber 11 from the second channel 132, after being filtered by the filter element 30, impurities in the working medium are left on the side of the filter element 30 close to the valve port 121 and finally stored in the storage area 40. (the arrows in the figure point in the direction of flow of the working medium)

Example six:

the difference between the sixth embodiment and the second embodiment is that:

referring to fig. 8, 9 and 10, the check valve 1 and the filter member 30 are detachably coupled. The check valve 1 comprises a convex part 50 and a concave part 60, one of the convex part 50 or the concave part 60 is positioned on the filter component 30, the other convex part 50 or the concave part 60 is positioned on the valve core seat 10, at least part of the convex part 50 is positioned in the concave part 60, and in particular, the valve core seat 10 and the filter component 30 are connected in a clamping mode through the convex part 50 and the concave part 60.

Referring to fig. 11 and 12, the recess 60 includes a first groove 601 and a second groove 602, the first groove 601 having a first groove 6011, the second groove 602 having a second groove 6021, and the first groove 6011 opened in the reference axis extending direction. The second groove portion 602 is located at least on one side of the first groove portion 601 in the circumferential direction of the reference shaft, and the first groove 6011 and the second groove 6021 communicate, and in the present embodiment, the second groove portion 602 has two, and is located on both sides of the first groove portion 601. The recess 60 has a second opening 61, the second opening 61 is located at least at one end of the first groove 601 along the reference axis, and the protrusion 50 can enter the first groove 601 from the second opening 61 along the reference axis. The second opening 61 is flared, the recess 60 has a guide wall 611, the wall forming the second opening 61 includes at least a part of the guide wall 611, the guide wall 611 is an arc-shaped wall, the valve core seat 10 or the filter element 30 has a first bottom wall, and the guide wall 611 smoothly connects the first bottom wall and the side wall of the first groove 601. In the present embodiment, the second opening 61 faces downward, the two guide walls 611 are provided, and the two guide walls 611 are disposed opposite to each other and located on both sides of the first groove 601.

The convex portion 50 includes a first clamping portion 501 and a second clamping portion 502, the first clamping portion 501 is disposed along the reference axis, the second clamping portion 502 is fixedly connected or connected in a limiting manner with the first clamping portion 501, or is integrally formed, in this embodiment, the first clamping portion 501 and the second clamping portion 502 are integrally formed. The second clamping portions 502 are matched with the concave portion 60, and are located on two sides of the first clamping portion 501 respectively around the circumference of the reference axis, and at least part of the second clamping portions 502 are located in the second groove portion 602. The width of the first clamping portion 501 is smaller than the groove width of the first groove 601, and the first clamping portion 501 can be slidably connected to the first groove 601 along the reference axis direction. The maximum width of the protrusion 50 is greater than the groove width of the first groove 601, that is, the point of the second engaging portion 502 far from the first engaging portion 501 is defined as a far end, and the distance between the two far ends is greater than the groove width of the first groove 601, so that when the second engaging portion 502 is located in the second groove 602, the second engaging portion 502 is limited on the wall of the second groove 602 along the reference axis direction. It should be noted that the second clamping portion 502 has the ability to deform slightly, and in this embodiment, the first clamping portion 501 and the second clamping portion 502 are made of thermoplastic plastics.

Along the reference axis direction, the first clamping portion 501 has at least one end portion, the second clamping portion 502 is close to one of the end portions, at least part of the second clamping portion 502 is located in the second groove portion 602, the second groove portion 602 is located at a side close to the second opening 61, two end portions are defined, one end of the first clamping portion 501, which is far away from the second clamping portion 502, is a first end 5011, one end of the second clamping portion 502, which is close to the second clamping portion 502, is a second end 5012, when the first clamping portion 501 penetrates into the first groove portion 601, the first end 5011 penetrates, the first end 5011 is relatively far away from the second clamping portion 502, before the convex portion 50 is axially limited, axial guiding is performed on the convex portion 50, after installation is completed, the side wall of the first clamping portion 501 is in clearance fit with the wall of the first groove 6011, and a good circumferential limiting effect can be achieved.

The wall junction that defines first slot part 601 and second slot part 602 is intersecting line 62, and second joint portion 502 includes cambered surface portion 63, and cambered surface portion 63 includes first cambered surface portion 631 and second cambered surface portion 632, and first cambered surface portion 631 middle part is kept away from first joint portion 501 outwards relatively, and second cambered surface portion 632 is interior concavity, and first cambered surface portion 631 is connected to second cambered surface portion 632 one side, and first joint portion 501 is connected to the opposite side, and intersecting line 62 and first cambered surface portion 631 or second cambered surface portion 632 butt. Set up cambered surface portion 63, can make the relative concave part 60 of convex part 50 remove when second joint portion 502 and the relative position of second slot portion 602, second joint portion 502 penetrates second slot portion 602 comparatively easily, and cambered surface portion 63's shape recovery ability is stronger relatively in addition, can play quick spacing effect. In the present embodiment, only the case where the intersection line 62 abuts on the second arc surface portion 632 is illustrated, and the actual use is not limited to this configuration.

In the above embodiment, with respect to the structures of the convex portion 50 and the concave portion 60, one of which is located in the filter member 30 and the other of which is located in the valve plug seat 10, only the structure in which the convex portion 50 is located in the filter member 30 and the concave portion 60 is located in the valve plug seat 10 is shown in the drawings, but the practical use is not limited to the above structure. In addition, the reference axis direction is defined as the direction from the valve port 121 to the upper side and the direction from the valve port 121 to the lower side.

The installation steps of this embodiment include: when the filter element 30 is installed, the end portion of the valve core seat 10 penetrates into the filter element 30, the first clamping portion 501 faces the first groove portion 601, the filter element 30 continues to axially move, the first clamping portion 501 penetrates into the first groove portion 601 through the second opening 61 until the second clamping portion 502 enters the two second openings 61, axial force continues to be applied to the filter element 30, the second clamping portion 502 slightly deforms due to extrusion of the guide wall 611 until the first clamping portion 501 completely enters the first groove portion 601, the second clamping portion 502 faces the second groove portion 602 at the moment, the second clamping portion 502 recovers to the original shape after being laterally extruded, the intersecting line 62 of the first groove portion 601 and the second groove portion 602 abuts against the first arc surface portion 631 or the second arc surface portion 632 at the moment, and the axial limiting effect can be achieved.

In addition, a filter element 30 is also disclosed.

A filter element 30 is used for the check valve 1, the filter element 30 is detachably connected with the check valve 1, the filter element 30 comprises a convex part 50 or a concave part 60, the check valve 1 comprises a valve core seat 10, and the valve core seat 10 is matched with the convex part 50 or the concave part 60 of the filter element 30 to axially limit the filter element 30.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims (11)

1. A non-return valve (1), characterized in that: the check valve comprises a valve core seat (10), a valve core component (20) and a filtering component (30), wherein the check valve (1) is provided with a cavity (11), at least part of the valve core component (20) is positioned in the cavity (11), the check valve (1) is provided with a valve port (121), and the valve core component (20) can open or close the valve port (121);

the check valve (1) comprises a fluid channel (13), the fluid channel (13) can be communicated with the cavity (11), the filter component (30) is detachably connected with the valve core seat (10), and the filter component (30) comprises a part of wall forming the fluid channel (13).

2. A non-return valve (1) according to claim 1, characterized in that: the fluid channel (13) comprises a first channel (131) and a second channel (132), the walls forming the fluid channel (13) comprise part of the walls of the first channel (131) and part of the walls of the second channel (132), the fluid channel (13) comprises a filter channel (31), the filter member (30) comprises walls forming the filter channel (31), the filter channel (31) communicates with the first channel (131) or the second channel (132).

3. A non-return valve (1) according to claim 2, characterized in that: along the axial direction of the valve core seat (10), at least part of the first channel (131) is positioned on one side of the valve port (121), at least part of the second channel (132) is positioned on the other side of the valve port (121), and the filter channel (31) is communicated with the second channel (132).

4. A non-return valve (1) according to any one of claims 1-3, characterized in that: the one-way valve (1) comprises a convex part (50) and a concave part (60), one of the convex part (50) or the concave part (60) is positioned on the filter component (30), the other of the convex part (50) or the concave part (60) is positioned on the valve core seat (10), at least part of the convex part (50) is positioned in the concave part (60), and the convex part (50) is connected with the concave part (60) in a clamping mode.

5. A non-return valve (1) according to claim 4, characterized in that: the concave part (60) comprises a first groove part (601) and a second groove part (602), the second groove part (602) is at least positioned on one side of the first groove part (601) along the circumferential direction of the valve core seat (10), a first groove (6011) formed by the first groove part (601) is communicated with a second groove (6021) formed by the second groove part (602), the concave part (60) is provided with a second opening (61), the second opening (61) is at least positioned at one end of the first groove part (601) along the axial direction of the valve core seat (10), the convex part (50) can be accessed from the second opening (61), at least part of the convex part (50) is positioned in the second groove part (602), and the maximum width of the convex part (50) is larger than the groove width of the first groove part (601).

6. A non-return valve (1) according to claim 5, characterized in that: the second opening (61) is flared, the recess (60) has a guide wall (611), the wall forming the second opening (61) comprises at least part of the guide wall (611), the valve core seat (10) or the filter element (30) has a first bottom wall, and the guide wall (611) smoothly connects the first bottom wall and the wall of the first groove (601).

7. One-way valve (1) according to claim 5 or 6, characterized in that: convex part (50) include first joint portion (501) and second joint portion (502), second joint portion (502) with first joint portion (501) fixed connection or spacing connection or body structure, at least part first joint portion (501) are located first slot part (601), just first joint portion (501) can be followed the axial sliding connection of valve core case (10) first slot part (601).

8. A non-return valve (1) according to claim 7, characterized in that: along the axial direction of the valve core seat (10), the first clamping portion (501) is provided with at least one end portion, the second clamping portion (502) is close to one of the end portions, the second groove portion (602) is located on the side close to the second opening (61), and at least part of the second clamping portion (502) is located in the second groove portion (602).

9. One-way valve (1) according to claim 6 or 8, characterized in that: the wall connection part of the first groove part (601) and the second groove part (602) is defined as an intersection line (62), the convex part (50) comprises an arc surface part (63), and the intersection line (62) is abutted to the arc surface part (63).

10. A filter element (30) for a one-way valve (1) according to claims 1-9, characterized in that: the filtering component (30) is detachably connected with the one-way valve (1).

11. A filter element (30) according to claim 10, wherein: the filter component (30) comprises a convex part (50) or a concave part (60), the one-way valve (1) comprises a valve core seat (10), and the valve core seat (10) is matched with the convex part (50) or the concave part (60) of the filter component (30) to axially limit the filter component (30).

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