CN216618658U

CN216618658U - One-way valve

Info

Publication number: CN216618658U
Application number: CN202122588205.4U
Authority: CN
Inventors: 丁爽; 王飞; 张鹏; 张心怡; 许文明
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-05-27
Anticipated expiration: 2031-10-26

Abstract

The application relates to the technical field of fluid delivery, and discloses a one-way valve which comprises a valve body and a valve core, wherein the valve body is provided with a limiting piece; the valve core is arranged in the valve body and provided with a first end and a second end, and the second end is positioned on one side of the limiting piece; the second end and/or the limiting piece have magnetism, and when a channel of the one-way valve is opened, the valve core can be adsorbed on the limiting piece through magnetic force to limit the movement of the valve core. The valve core and/or the limiting part has magnetism, when a channel of the one-way valve is in a conducting state, the valve core can be adsorbed on the limiting part through magnetic force, the valve core is limited to move, the impact of the valve core and other structural parts under the influence of external force is effectively reduced, the service life is prolonged, and noise is reduced.

Description

One-way valve

Technical Field

The present application relates to the field of fluid delivery technology, for example, to a one-way valve.

Background

At present, a float-type check valve is usually used in an air conditioner system, and is arranged between a condenser and an evaporator, and the check valve has the functions that fluid can only flow along a water inlet, but medium at a water outlet cannot flow back, so that the mode switching of refrigeration or heating of the air conditioner system is facilitated.

The existing float-type one-way valve structure comprises a shell, a valve core, a valve seat and a limiting piece. When fluid flows in the forward direction, the valve core moves to a limiting position along the inside of the shell under the impact action of the fluid, the fluid flows out along a gap between the valve core and the shell as well as between the valve core and the limiting piece, and at the moment, a channel of the one-way valve is in a conducting state; when fluid flows reversely, the valve core moves to the valve seat position along the inner part of the shell under the impact action of the fluid, the top of the valve core is completely contacted with the valve seat without clearance, the fluid cannot flow out, and the channel of the one-way valve is in a closed state at the moment.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

when a channel of the existing float-type check valve is in a conducting state, a valve core is easily influenced by multiple factors of fluid flow and gravity, so that the valve core rotates and shifts in a cavity, deviates from a center or collides with a limiting part up and down, and collides with a shell or the limiting part to generate sound.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a one-way valve, which can effectively reduce the problem that a lower valve core collides with other structural parts under the influence of external force.

In some embodiments, a check valve includes a valve body and a valve core, wherein the valve body is provided with a limiting piece; the valve core is arranged in the valve body and provided with a first end and a second end, and the second end is positioned on one side of the limiting piece; the second end and/or the limiting piece have magnetism, and when a channel of the one-way valve is opened, the valve core can be adsorbed on the limiting piece through magnetic force to limit the movement of the valve core.

The one-way valve provided by the embodiment of the disclosure can realize the following technical effects:

the valve core and/or the limiting part has magnetism, when a channel of the one-way valve is in a conducting state, the valve core can be adsorbed on the limiting part through magnetic force, the valve core is limited to move, the impact of the valve core and other structural parts under the influence of external force is effectively reduced, the service life is prolonged, and noise is reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic illustration of a prior art rotary displacement of a valve spool;

FIG. 2 is a schematic illustration of a prior art spool offset;

FIG. 3 is a schematic view of the up and down movement of a valve cartridge in the prior art;

FIG. 4 is a schematic structural diagram of a check valve provided by an embodiment of the present disclosure;

FIG. 5 is a first schematic structural diagram of a valve cartridge provided in an embodiment of the present disclosure;

FIG. 6 is an enlarged, fragmentary view of a first mounting arrangement of the magnetic member of FIG. 5;

FIG. 7 is an enlarged, fragmentary view of a second alternative mounting arrangement for the magnetic member of FIG. 5;

FIG. 8 is an enlarged, fragmentary view of a third alternative arrangement of the magnetic member of FIG. 5;

FIG. 9 is an enlarged partial view of a fourth embodiment of the magnetic member of FIG. 5;

FIG. 10 is an enlarged, fragmentary view of a fifth alternative mounting arrangement for the magnetic member of FIG. 5;

FIG. 11 is a second schematic structural view of a valve cartridge provided by an embodiment of the present disclosure;

FIG. 12 is an enlarged partial view of one embodiment of the magnetic member of FIG. 11;

FIG. 13 is an enlarged partial view of an alternative mounting arrangement for the magnetic member of FIG. 11;

FIG. 14 is a third schematic structural view of a valve cartridge provided by an embodiment of the present disclosure;

FIG. 15 is an enlarged, fragmentary view of one embodiment of the magnetic member of FIG. 14;

FIG. 16 is a first schematic structural view of a magnetic member mounting position provided by an embodiment of the present disclosure;

fig. 17 is a second schematic structural view of a magnetic member mounting position provided in the embodiment of the present disclosure;

fig. 18 is a third schematic structural view of a magnetic member mounting position provided by the embodiment of the present disclosure;

fig. 19 is a fourth schematic structural diagram of a magnetic member installation position provided by the embodiment of the present disclosure.

Reference numerals:

10: a valve body; 101: a limiting member; 102: a valve seat;

20: a valve core; 201: a groove;

30: a magnetic member.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

When the valve core 20 of the conventional float-type check valve is acted by fluid and moves to the limiting piece 101, the valve core 20 is easily influenced by multiple influences of fluid flow and gravity, so that the valve core 20 collides with the wall surface of the cavity and the limiting piece in the cavity of the check valve to generate collision sound. When the impact sound is large enough, the total noise value of the outdoor unit can be influenced, and the impact sound is easily transmitted to the indoor side along the refrigeration pipeline because the propagation speed of the sound in the solid medium is high, so that the sound quality of the indoor side is influenced.

As shown in fig. 1, the valve core 20 rotates and moves in the cavity of the check valve, and easily collides with the limiting member 101 and the inner wall of the cavity; as shown in fig. 2, the valve core 20 is offset in the cavity of the check valve and easily collides with the inner wall of the cavity; as shown in fig. 3, the valve element 20 moves up and down in the cavity of the check valve, and easily collides with the stopper 101. Noise is generated.

Referring to fig. 4, the present embodiment provides a check valve, which includes a valve body 10 and a valve core 20, wherein the valve body 10 has a limiting member 101; the valve core 20 is arranged in the valve body 10, the valve core 20 is provided with a first end and a second end, and the second end is positioned on one side of the limiting piece 101; the second end and/or the limiting member 101 has magnetism, and when a channel of the one-way valve is opened, the valve core 20 can be adsorbed on the limiting member 101 through magnetic force, so that the movement of the valve core 20 is limited.

Adopt this disclosed embodiment's check valve, have magnetism through case and/or locating part, when the passageway of check valve is in the conducting state, can make the case adsorb on the locating part through magnetic force, inject the case motion, effectual reduction receives external force to influence case and other structure to bump, and then increase life, noise abatement.

In this embodiment, the check valve includes a tubular valve body 10, a cylindrical cavity inside the valve body 10, and a valve seat 102, where the valve seat 102 is disposed in the cavity of the valve body 10, and the limiting member 101 is disposed in the cavity of the valve body 10, so that the valve seat 102 and the limiting member 101 form a limiting space.

Optionally, the valve core 20 is disposed in the limiting space, and the valve core 20 has a first end and a second end, and the first end is a tapered plug structure. The valve seat 102 is provided with a through hole for fluid to flow in, and the valve element 20 is a tapered plug at a side of the through hole close to the valve seat 102. When the fluid flows in the positive direction from one side of the valve seat 102, the fluid pushes the conical plug of the valve core 20, so that the fluid can flow in from the through hole of the valve seat 102, and a channel of the one-way valve is opened; when fluid flows in from the side of the limiting member 101 in the opposite direction, the fluid pushes the valve element 20, so that the tapered plug of the valve element 20 can be inserted into the through hole of the valve seat 102, thereby closing the passage of the check valve.

In this embodiment, in order to prevent the valve element 20 from colliding with the inner sidewall of the cavity of the valve body 10 and the limiting component after the fluid pushes the tapered plug of the valve element 20, the other side, i.e., the second end, of the valve element 20 away from the tapered plug has magnetism. Or, the stopper 101 has magnetism, so that the valve element 20 can be attracted to the stopper 101 to limit the movement of the valve element 20. Collision of the valve element 20 with other structural members can be effectively reduced.

Optionally, when the valve element 20 moves to the limiting member 101, under the action of magnetic force, the valve element 20 and the limiting member 101 may be adsorbed together, and the valve element 20 is no longer rotated, tilted or vertically vibrated and displaced due to the action of external force, so as to reduce the possibility of collision sound generated by collision between the valve element 20 and the cavity and between the valve element 20 and the limiting member 10 to a certain extent.

In the present embodiment, when the fluid flows in the reverse direction, the valve element 20 is separated from the stopper 101 and moves toward the valve seat 102 by the external force of the fluid impact.

Alternatively, the magnetic force between the spool 20 and the stopper 101 needs to be smaller than the impact external force of the fluid, i.e., F₂＜F₁Wherein F is₂Is the magnetic force between the valve element 20 and the stopper 101, F₁Is the impact force of the fluid.

Alternatively, F₂Where m is the magnetic pole strength and H is the magnetic field strength.

In this embodiment, the second end of the valve core 20 is made of a magnetic metal, and a local position or a whole position of the limiting member 101 is made of a material that can be attracted by the magnetic metal; or the second end of the valve core 20 is made of a material that can be attracted by magnetic metal, and the position of the position-limiting member 101 is partially or completely made of magnetic metal. So as to achieve the effect that the valve core 20 and the limiting member 101 can attract each other.

Optionally, material powder of magnetic metal is doped in the valve core 20, and material powder that can be attracted by the magnetic metal is doped in the limiting member 101; alternatively, the valve body 20 is doped with material powder that can be attracted by magnetic metal, and the stopper 101 is doped with material powder of magnetic metal. The valve element 20 and the stopper 101 can attract each other.

Among the materials that may be used for the magnetic metal are: magnetic alloys, permanent magnetic ferrites, iron, nickel, iron alloys, nickel alloys, and the like. Materials that can be attracted to magnetic metals include: 430 stainless steel, 420 stainless steel, 410 stainless steel, and the like.

In some embodiments, when the second end and the limiting member 101 have magnetism, the magnetic pole of the second end is opposite to the magnetic pole of the limiting member 101. The valve core 20 can be adsorbed on the stopper 101 to limit the movement of the valve core 20. Collision of the valve element 20 with other structural members can be effectively reduced.

In the embodiment, the second end of the valve element 20 has magnetism, and the stopper 101 also has magnetism, and if the magnetic pole of the second end of the valve element 20 is the same as the magnetic pole of the stopper 101, the same magnetic pole repels each other, so that the valve element 20 cannot be attracted to the stopper 101. Therefore, the magnetic pole of the second end of the valve element 20 is different from the magnetic pole of the limiting member 101, and different magnetic poles attract each other, so that the valve element 20 is adsorbed on the limiting member 101, and the movement of the valve element 20 is further limited.

Alternatively, the magnetic member 30 may be mounted on the second end of the valve element 20 or the stopper 101, and the valve element 20 may be attracted to the stopper 101 by the magnetic member 30.

In some embodiments, the valve body 10 includes: the magnetic member 30, having magnetism, is disposed at the second end. The valve element 20 can be attracted to the stopper 101 by the magnetic force of the magnetic member 30.

In the embodiment, when the valve element 20 moves to the limiting member 101, under the magnetic force of the magnetic member 30, the valve element 20 and the limiting member 101 can be attracted together, and the valve element 20 does not rotate, tilt or vibrate up and down and shift due to the external force, so that the possibility of generating collision noise due to collision between the valve element 20 and the cavity and between the valve element 20 and the limiting member 10 is reduced to a certain extent.

The magnetic member 30 is disposed on the valve element 20, and in order to enable the magnetic member 30 to be only attracted to the limiting member 101, the valve seat 102 and the valve body 10 are made of materials that do not attract the magnetic member 30, so that the magnetic member 30 does not affect the movement of the valve element 20 in the one-way valve cavity.

Alternatively, the magnetic member 30 may have a plurality of positions, and the magnetic member 30 may be installed in different ways at different positions.

As shown in connection with fig. 5, in some embodiments, the magnetic member 30 is disposed on a surface of the second end of the valve spool 20. The valve element 20 can be attracted to the stopper 101 by the magnetic member 30.

In the present embodiment, the magnetic member 30 and the valve core 20 are mounted on the surface of the second end of the valve core 20 by a mounting structure, which may be formed by welding, clamping, or injection molding.

Alternatively, as shown in fig. 6, the magnetic member 30 is disposed on a surface of the second end of the valve core 20, and an insertion groove is disposed on a surface of the second end of the valve core 20, and the shape of the magnetic member 30 is the same as that of the insertion groove. The magnetic member 30 is put into the fitting groove and the exposed flat surface of the magnetic member 30 is flush with the surface of the second end of the valve core 20. Alternatively, as shown in fig. 7, the exposed flat surface of the magnetic member 30 is higher than the surface of the second end of the spool 20.

Alternatively, as shown in fig. 8, the magnetic member 30 is disposed on a surface of the second end of the valve core 20, a first locking groove is disposed on a surface of the second end of the valve core 20, and a shape of the first end of the magnetic member 30 is the same as a shape of the first locking groove. The first end of the magnetic member 30 is placed in the first engaging groove, such that the second end of the magnetic member 30 is exposed and protrudes out of the surface of the second end of the valve core 20.

Optionally, as shown in fig. 9, the magnetic member 30 is disposed on a surface of the second end of the valve core 20, a second locking groove is disposed on the surface of the second end of the valve core 20, a locking edge is further disposed on an inner side of the locking groove, and a slot into which the locking edge is locked is disposed on the magnetic member 30. The first end of the magnetic member 30 is placed in the second engaging groove, and the engaging edge is inserted into the inserting groove, so that the second end of the magnetic member 30 is exposed and protrudes out of the surface of the second end of the valve core 20.

Alternatively, as shown in fig. 10, the magnetic member 30 is disposed on a surface of the second end of the valve core 20, a plurality of first limiting grooves are disposed on a surface of the second end of the valve core 20, and a first limiting edge inserted into the first limiting grooves is disposed on the magnetic member 30. The first limit edge of the magnetic member 30 is placed in the first limit groove, so that the second end of the magnetic member 30 is exposed and protrudes out of the surface of the second end of the valve core 20.

As shown in fig. 11, in some embodiments, the surface of the second end of the valve core 20 is provided with a groove 201, and the magnetic element 30 is disposed in the groove 201. The valve element 20 can be attracted to the stopper 101 by the magnetic member 30.

In this embodiment, the magnetic member 30 is disposed in the groove 201 in the middle of the valve core 20, and various mounting methods, such as welding, clamping, or injection molding, may also be adopted. The surface structure of the magnetic member 30 mounted to the second end of the valve core 20 is the same as that of the magnetic member when welding, clamping or injection molding is used.

Optionally, as shown in fig. 12, a groove 201 is formed in a surface of the second end of the valve element 20, the magnetic member 30 is disposed in the groove 201, a plurality of second limiting grooves are disposed in the groove 20, and a second limiting edge inserted into the second limiting groove is disposed on the magnetic member 30. The second limiting edge of the magnetic member 30 is placed in the second limiting groove, so that the second end of the magnetic member 30 is exposed and protrudes out of the surface of the groove 201, and the second end of the magnetic member 30 is lower than the depth of the groove 201.

In the present embodiment, the magnetic member 30 is disposed in the groove 201, and when the valve element 20 contacts the stopper 101, the magnetic member 30 does not directly contact the stopper 101, and a gap d exists between the magnetic member 30 and the stopper 101. Since there is a gap d between the magnetic member 30 and the stopper 101, the magnetic force is proportional to the gap d. When the gap d between the magnetic member 30 and the limiting member 101 is too large, the magnetic pole strength and the magnetic field strength can be properly increased; when the gap d between the magnetic member 30 and the stopper 101 is too small, the magnetic pole strength and the magnetic field strength can be appropriately reduced.

As shown in connection with fig. 13, in some embodiments, the magnetic member 30 is riveted within the recess 201. The valve element 20 can be attracted to the stopper 101 by the magnetic member 30.

In this embodiment, a groove 201 is formed in a surface of the second end of the valve element 20, the magnetic element 30 and the valve element 20 are mounted in the groove 201, a third locking groove is formed in the groove in the middle of the valve element 20, and a third limiting edge inserted into the third locking groove is formed on the magnetic element 30. The third limiting edge of the magnetic member 30 is placed in the third slot, so that the second end of the magnetic member 30 is exposed and protrudes out of the surface of the second end of the valve core 20. And a groove 201 formed in the middle of the valve core 20 to which the magnetic member 30 is fixed by a rivet. And the end of the rivet is also in the groove 201, so that the second end surface of the valve core 20 is ensured to be flat.

As shown in connection with fig. 14, in some embodiments, the magnetic member 30 is disposed inside the valve core 20. The valve element 20 can be attracted to the stopper 101 by the magnetic member 30.

Referring to fig. 15, in the present embodiment, the magnetic member 30 and the valve element 20 are installed such that the magnetic member 30 is disposed inside the valve element 20 and is also located at the second end of the valve element 20, so that the structural shape of the magnetic member 30 is not specifically limited herein, and optionally, the magnetic member 30 is disposed on the central axis of the valve element 20, so that when the valve element 20 contacts the limiting member 101, the valve element 20 is located at the center of the limiting member 101, and the fluid flow is not affected.

In the present embodiment, the magnetic member 30 is disposed inside the valve element 20, and when the valve element 20 contacts the stopper 101, the magnetic member 30 does not directly contact the stopper 101, and a gap d exists between the magnetic member 30 and the stopper 101. Since there is a gap d between the magnetic member 30 and the stopper 101, the magnetic force is proportional to the gap d. When the gap d between the magnetic member 30 and the limiting member 101 is too large, the magnetic pole strength and the magnetic field strength can be properly increased; when the gap d between the magnetic member 30 and the stopper 101 is too small, the magnetic pole strength and the magnetic field strength can be appropriately reduced.

As shown in fig. 16-17, in some embodiments, the magnetic member 30 includes a magnetic block disposed at an axial position of the valve core 20. When the valve element 20 contacts the stopper 101, the valve element 20 is located at the center of the stopper 101, and the fluid flow is not affected.

In the present embodiment, the magnetic member 30 may be a magnetic block, and the magnetic member 30 may be disposed on the surface of the second end of the valve core 20, in the groove 201 of the second end of the valve core 20, or inside the valve core 20. Optionally, the magnetic block is in a regular shape, and comprises a polygonal structure such as a circle or a square.

The valve core 20 is generally circular, and for example, the magnetic piece 30 is a circular magnetic block, and is disposed on a surface of the second end of the valve core 20, and the limiting piece 101 can be attracted by the magnetic piece 30. When fluid flows in through the through hole of the valve seat 102, the valve element 20 moves toward the stopper 101, and the valve element 20 stops moving after contacting the stopper 101, so that a gap is left between the valve element 20 and the wall surface of the valve body 10 and the stopper 101, and the fluid can flow out of the gap.

As shown in fig. 18, in some embodiments, the magnetic member 30 includes an annular magnetic strip disposed on the outer circumference of the axial core of the valve core 20. When the valve element 20 contacts the stopper 101, the valve element 20 is located at the center of the stopper 101, and the fluid flow is not affected.

In this embodiment, the magnetic member 30 may be an annular magnetic strip, and the magnetic member 30 may be disposed on the surface of the second end of the valve core 20, in the groove 201 of the second end of the valve core 20, or inside the valve core 20. Optionally, the annular magnetic stripe is in a regular shape, and comprises a polygonal structure such as a circle or a square.

The valve core 20 is generally of a circular structure, and for example, the magnetic member 30 is a circular magnetic ring, and is disposed on a surface of the second end of the valve core 20, and the limiting member 101 can be attracted by the magnetic member 30. When fluid flows in through the through hole of the valve seat 102, the valve element 20 moves toward the stopper 101, and the valve element 20 stops moving after contacting the stopper 101, so that a gap is left between the valve element 20 and the wall surface of the valve body 10 and the stopper 101, and the fluid can flow out of the gap.

As shown in connection with fig. 19, in some embodiments, the magnetic member 30 includes a plurality of magnetic strips. When the valve element 20 contacts the stopper 101, the valve element 20 is located at the center of the stopper 101, and the fluid flow is not affected.

In this embodiment, the magnetic member 30 may be a plurality of magnetic strips, and the magnetic member 30 may be disposed on the surface of the second end of the valve core 20, in the groove 201 of the second end of the valve core 20, or inside the valve core 20. Alternatively, multiple magnetic strip structures may be provided at different locations, such as at edge locations of the valve cartridge 20.

The valve core 20 is generally circular, and for example, the magnetic member 30 is two arc-shaped magnetic strips, and is disposed on a surface of the second end of the valve core 20, and the retaining member 101 can be attracted by the magnetic member 30. When fluid flows in through the through hole of the valve seat 102, the valve element 20 moves toward the stopper 101, and the valve element 20 stops moving after contacting the stopper 101, so that a gap is left between the valve element 20 and the wall surface of the valve body 10 and the stopper 101, and the fluid can flow out of the gap.

In conclusion, by means of the technical scheme, the valve core and/or the limiting piece are magnetic, when the channel of the one-way valve is in a conducting state, the valve core can be adsorbed on the limiting piece through magnetic force, the movement of the valve core is limited, the collision of the valve core and other structural parts under the influence of external force is effectively reduced, the service life is prolonged, and noise is reduced.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A check valve, comprising:

a valve body (10) having a stopper (101);

the valve core (20) is arranged in the valve body (10), the valve core (20) is provided with a first end and a second end, and the second end is positioned on one side of the limiting piece (101);

the second end and/or the limiting piece (101) have magnetism, and when a channel of the one-way valve is opened, the valve core (20) can be adsorbed on the limiting piece (101) through magnetic force, so that the valve core (20) is limited to move.

2. The non-return valve according to claim 1, characterized in that when both the second end and the limit piece (101) are magnetic, the magnetic pole of the second end is opposite to the magnetic pole of the limit piece (101).

3. The non-return valve according to claim 1, characterized in that the valve body (10) comprises:

and the magnetic part (30) has magnetism and is arranged at the second end.

4. A non-return valve according to claim 3, characterised in that the magnetic element (30) is provided on the surface of the second end of the spool (20).

5. A non-return valve according to claim 3, characterised in that the surface of the second end of the spool (20) is provided with a groove (201), the magnetic element (30) being provided in the groove (201).

6. A non-return valve according to claim 5, characterised in that the magnetic element (30) is snap-riveted in the recess (201).

7. A non-return valve according to claim 3, characterised in that the magnetic element (30) is arranged inside the valve cartridge (20).

8. The non-return valve according to any of claims 3 to 7, characterized in that the magnetic member (30) comprises a magnet, which is disposed at the axial position of the spool (20).

9. The non-return valve according to any of claims 3 to 7, characterized in that the magnetic member (30) comprises an annular magnetic strip, which is disposed on the axial outer circumference of the valve element (20).

10. A non-return valve according to one of claims 3 to 7, characterised in that the magnetic member (30) comprises a plurality of magnetic strips.