WO2023185916A1

WO2023185916A1 - Valve core and one-way valve

Info

Publication number: WO2023185916A1
Application number: PCT/CN2023/084660
Authority: WO
Inventors: 宣永斌; 寿周阳
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-04-02
Filing date: 2023-03-29
Publication date: 2023-10-05
Also published as: CN217056463U

Abstract

A valve core (3) and a one-way valve. The valve core (3) comprises a body (31) and a plurality of wing plates (32). A side surface of the body (31) is provided with at least one variable-diameter portion (314); the plurality of wing plates (32) are arranged on the side surface of the body (31) in a protruding manner, and are arranged at intervals from each other in the circumferential direction of the body (31), and flow channels (61, 62, 63) are formed between every two adjacent wing plates (32); the variable-diameter portion (314) is provided in at least one of the flow channels (61, 62, 63), such that the flow area of the flow channel corresponding to the variable-diameter portion (314) is not equal to the flow area of at least one of the remaining flow channels; and an outer wall surface of the variable-diameter portion (314) and a virtual plane (7) form a line segment (71), radial distances H between each point on the line segment (71) and an axis L of the body (31) are not completely equal, and the virtual plane (7) is perpendicular to the axis of the body (31). In the process of fluid passing through the valve core (3), the magnitudes of forces received by the valve core (3) in the radial direction thereof are not uniform, such that a radial resultant force along the valve core (3) is not zero, and the radial resultant force causes the valve core (3) to abut against an inner wall surface of an inner cavity of the valve body, thereby preventing the valve core (3) from impacting the valve body to generate noise.

Description

Valve core and one-way valve

cross reference

This disclosure claims priority to the Chinese patent application with application number 202220783608.6 and titled "Valve Core and Check Valve" filed on April 2, 2022. The entire content of this Chinese patent application is incorporated herein by reference.

Technical field

The present disclosure relates to the technical field of valve structures, and specifically to a valve core and a one-way valve.

Background technique

One-way valves are widely used in refrigeration systems. For example, they are connected in parallel with capillary tubes in air conditioning systems to control the forward/reverse flow of refrigerant so that the refrigerant flows in the specified direction.

The prior art proposes a float-type one-way valve, which includes a valve body and a valve core installed inside the valve body. The valve core includes a body and a plurality of wings protruding from the body. However, in the existing technology, after the valve body is installed in the air-conditioning pipeline, due to pipeline vibration and the structure of the valve body itself, the valve core will shake and vibrate left and right inside the valve body, and hit the inner wall of the valve body, causing noise. .

Contents of the invention

Embodiments of the present disclosure provide a valve core and a one-way valve to improve the problem of noise generated by the valve core hitting the valve body existing in the prior art.

The valve core of the one-way valve in the embodiment of the present disclosure includes a body and a plurality of wing plates. The side of the body has at least one reducing portion; the plurality of wing plates are protruding from the side of the body and along the The body is circumferentially spaced, and a flow channel is formed between each two adjacent wing plates; wherein, at least one of the flow channels is provided with the diameter reducing portion, so that the flow corresponding to the diameter reducing portion The flow area of the channel is not equal to the flow area of at least one of the remaining flow channels; wherein, the outer wall surface of the reducing portion and a virtual plane form a line segment, and each point on the line segment is consistent with the axis of the body. The radial distances between them are not all equal, and the virtual plane is perpendicular to the axis of the body.

The one-way valve in the embodiment of the present disclosure includes a valve body and the above-mentioned valve core, and the valve core is arranged in the valve body.

One embodiment in the above disclosure has at least the following advantages or beneficial effects:

In the valve core of the embodiment of the present disclosure, the reducing portion is provided between two adjacent wing plates. By providing the reducing portion on the body, the flow area of the flow channel corresponding to the reducing portion is at least the same as that of the remaining flow channels. The circulation areas of a are not equal, due to the circulation The flow channel with larger area is subject to greater fluid pressure, while the flow channel with smaller flow area is subject to smaller fluid pressure. When the fluid passes through the valve core, the valve core receives different forces along its radial direction. , causing the radial resultant force along the radial direction of the valve core to be non-zero. This radial resultant force will cause the valve core to press against the inner wall surface of the valve body cavity, thereby preventing the valve core from hitting the valve body and causing noise.

Description of drawings

Figure 1 shows a schematic diagram of a one-way valve according to an embodiment of the present disclosure.

FIG. 2 shows a cross-sectional view along line A-A in FIG. 1 .

FIG. 3 shows an exploded schematic diagram of the one-way valve according to the embodiment of the present disclosure.

FIG. 4 shows a schematic view of the valve core according to the embodiment of the present disclosure from one perspective.

FIG. 5 shows a schematic diagram of the valve core of the embodiment of the present disclosure from another perspective.

FIG. 6 shows a schematic diagram of a valve core according to another embodiment of the present disclosure.

FIG. 7 shows a schematic diagram of a line segment formed by cutting the reducing part on a virtual plane.

Among them, the reference symbols are explained as follows:

1. First takeover

2. Valve body

21. Valve port

3. Valve core

31. Ontology

311. Equal diameter section

312. First variable diameter section

313. Second variable diameter section

314. Reducing part

315. Bulge

32. Wing plate

331. First straight line segment

332. Second straight line segment

333. First arc segment

334. Second arc segment

4. End cap

5. Second takeover

61. First flow channel

62. Second flow channel

63. Third flow channel

7. Virtual plane

71. Line segment

α1, the first included angle

α2, the second included angle

α3, the third included angle

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments. To those skilled in the art. The same reference numerals in the drawings indicate the same or similar structures, and thus their detailed descriptions will be omitted.

As shown in FIGS. 1 to 3 , FIG. 1 shows a schematic diagram of a one-way valve according to an embodiment of the present disclosure. FIG. 2 shows a cross-sectional view along line A-A in FIG. 1 . FIG. 3 shows an exploded schematic diagram of the one-way valve according to the embodiment of the present disclosure. The one-way valve in the embodiment of the present disclosure includes: a first pipe 1 , a valve body 2 , a valve core 3 , an end cap 4 and a second pipe 5 . The first pipe 1 is connected to one end of the valve body 2 and is used to connect the fluid inlet pipe. The end cap 4 is connected to the other end of the valve body 2 . The second pipe 5 is connected to the end cover 4 and is used to connect the fluid outlet pipe. The valve core 3 is disposed in the inner cavity of the valve body 2 and is used to block or open the valve port 21 formed inside the valve body 2 .

It will be understood that the terms "including" and "having" and any variations thereof in the embodiments of the present disclosure are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or components inherent to such processes, methods, products or devices.

As an example, fluid enters the valve body 2 from the first pipe 1, and the pressure of the fluid itself drives the valve core 3 in the valve body 2 to move toward the second pipe 5, so that the valve port 21 of the valve body 2 is opened. The fluid passes through the valve body 2 to the second connection 5 . When the flow of fluid to the second connecting pipe 5 stops, the valve core 3 can be reset to a position where it continues to block the valve port 21 by virtue of its own gravity or a driving force toward the valve port. For example, in some examples, the one-way valve is placed in a vertical direction, that is, after the one-way valve is rotated 90 degrees counterclockwise in Figure 2, the first pipe 1 is located at the valve On the bottom surface of the valve body, the second nozzle 5 is located on the top surface of the valve body. When the continuous injection of fluid into the first nozzle 1 is stopped, that is, the flow of fluid to the second nozzle 5 stops. At this time, the valve core 3 is under the action of its own gravity. Move downward to block the valve port 21, and the one-way valve closes.

It can be understood that by the valve core 3 reciprocating along the axis of the valve body 2, the valve port 21 can be opened and closed, thereby realizing the one-way communication function.

It should be understood that the structures and materials of the first nozzle 1, the valve body 2, the end cover 4 and the second nozzle 5 do not constitute substantial restrictions on the technical solution of the valve core 3 provided in this application, and mature solutions in the existing technology can be used. products, which will not be described in detail here.

As shown in Figures 4 and 5, Figure 4 shows a schematic diagram of the valve core 3 of the embodiment of the present disclosure from one perspective. FIG. 5 shows a schematic diagram of the valve core 3 of the embodiment of the present disclosure from another perspective. The valve core 3 in the embodiment of the present disclosure includes a body 31 and a plurality of wings 32 . The side surface of the body 31 has at least one reducing portion 314 . A plurality of wing plates 32 are protruding from the side of the body 31 and are spaced apart along the circumference of the body 31. A flow channel (61, 62, 63) is formed between each two adjacent wing plates 32. The reducing portion 314 is disposed between two adjacent wings 32 so that the flow area of the flow channel corresponding to the reducing portion 314 is not equal to the flow area of at least one of the remaining flow channels.

In this embodiment, the reducing portion 314 is provided between two adjacent wing plates 32. By providing the reducing portion 314 on the body 31, the flow area of the flow channel corresponding to the reducing portion 314 is different from other flow areas. The flow areas of at least one of the channels are unequal. Since the flow channel with a larger flow area receives a greater fluid pressure, while the flow channel with a smaller flow area receives a smaller fluid pressure, when the fluid passes through the valve core 3, The magnitude of the various forces received by the valve core 3 along its radial direction is inconsistent, resulting in an unbalanced force along the radial direction of the valve core 3, that is, the radial resultant force experienced by the valve core 3 is not zero. Under the action of the radial resultant force, the valve core 3 will be biased in the valve body in the direction of the radial resultant force, that is, the radial resultant force will cause the valve core 3 to abut against the inner wall surface of the inner cavity of the valve body 2. In this way, when the valve core moves along the axial direction of the valve body in the valve body, one side of the valve core 3 continues to fit against the inner wall of the valve body, thereby preventing the valve core 3 from hitting the valve body 2 and causing noise.

It should be noted that in the prior art, the body of the valve core is generally a regular-shaped rotary body, such as a cylinder. A plurality of wing plates are protrudingly provided on the outer side wall of the body and are evenly spaced along the circumferential direction of the body. In this way, the flow area of the flow channel formed between each two adjacent wing plates remains basically the same. When the fluid flows through the valve core, the force of the valve core in its radial direction remains basically balanced. And because the valve core needs to reciprocate in the valve body along the axis of the valve body, a gap needs to exist between the wing plate and the inner wall surface of the inner cavity of the valve body. When the valve body is installed in the air-conditioning pipeline, and there is vibration in the air-conditioning pipeline and/or due to the structure of the valve body itself, due to the existence of gaps, the valve core will shake and jitter left and right relative to the valve body inside the valve body, and then hit the valve. The body produces noise.

In the embodiment of the present disclosure, by providing the reducing portion 314 on the body 31 of the valve core 3, the reducing portion 314 can make the present invention The body 31 has an irregular shape on the same radial cross-section corresponding to the portion where the reducing portion 314 is provided. Furthermore, when a plurality of wing plates 32 are arranged on the side of the body 31, a gap is formed between each two adjacent wing plates 32. The flow areas of the multiple flow channels are different in size, which ultimately causes the valve core 3 to abut against the inner wall of the valve body 2 to prevent it from shaking.

In one embodiment, the reduced diameter portion 314 is configured as a tangential face.

By configuring the reducing portion 314 as a tangential surface, the distance between the area of the body 31 where the tangential surface is located and the axis of the body 31 becomes smaller, thereby increasing the flow area of the flow channel corresponding to the tangential surface. The flow area of the flow channel corresponding to this cut surface is larger than the flow area of other flow channels in the body 31 that are not provided with a cut surface position. Ultimately, when the fluid passes through the valve core 3, the valve core 3 moves in the radial direction. The forces are not balanced.

It can be understood that the cut surface can be formed by integrally forming the body 31 and the wing plate 32, such as by molding. Of course, the body 31 with a regular shape can also be formed first, and then the cut surface can be formed by milling the body 31 .

In one embodiment, the cut surface may be close to one end of the body 31 , which is adjacent to the valve port 21 of the valve body 2 .

The cut plane and the axis of the body 31 may be parallel or non-parallel. When the tangential surface is not parallel to the axis of the main body 31, the tangential surface and the axis of the main body 31 may gradually approach or gradually move away from each other along the flow direction of the fluid.

The body 31 includes a constant diameter section 311 , a first variable diameter section 312 and a second variable diameter section 313 . The first variable diameter section 312 is connected to one end of the equal diameter section 311 , and the first variable diameter section 312 is used to sealingly cooperate with the valve port 21 of the valve body 2 . When the one-way valve is turned on, the first reducing section 312 is separated from the valve port 21 of the valve body 2 . When the one-way valve is closed, the first reducing section 312 blocks the valve port 21 of the valve body 2 . The second variable diameter section 313 is connected to the other end of the equal diameter section 311 .

The equal-diameter section 311 can be understood as: the equal-diameter section 311 is cut in a direction perpendicular to the axis of the body 31, and the cross-sectional areas of the multiple sections formed are all equal. The first variable diameter section 312 and the second variable diameter section 313 can be understood as: the first variable diameter section 312 and the second variable diameter section 313 are respectively cut in the direction perpendicular to the axis of the body 31 and formed after cutting the first variable diameter section 312 The cross-sectional areas of the multiple sections are not equal, and the cross-sectional areas of the multiple sections formed after cutting the second reducing section 313 are not equal.

As an example, the first variable diameter section 312 extends from one end of the constant diameter section 311 in a direction away from the second variable diameter section 313 , and the cross-sectional area of the first variable diameter section 312 gradually becomes smaller. The second variable diameter section 313 extends from the other end of the equal diameter section 311 in a direction away from the first variable diameter section 312, and the cross-sectional area of the second variable diameter section 313 gradually becomes smaller.

The tangent surface and the side surface of the equal diameter section 311 form a first straight line segment 331 and a second straight line segment 332 respectively. The tangent surface and the side surface of the first reducing section 312 form a first arc section 333. The tangent surface and the side surface of the second reducing section 313 form a second arc section 334. The first arc segment 333, the first straight line segment 331, the second arc segment 334 and the second straight line segment 332 are connected end to end in sequence and form a closed curve.

It can be understood that the constant diameter section 311 can be formed by cutting a cylindrical shape, and the first variable diameter section 312 and the second variable diameter section 313 can be formed by cutting a truncated cone.

In one embodiment, the taper of the truncated cone of the first reducing diameter section 312 and the taper of the truncated cone of the second reducing diameter section 313 may be the same or different. It can be understood that the taper refers to the ratio of the diameter difference between the upper and lower base circles of the truncated cone to the height of the truncated cone.

The wing plate 32 is connected to the equal diameter section 311 and the second variable diameter section 313 , and one end of the wing plate 32 protrudes from the end surface of the second variable diameter section 313 away from the equal diameter section 311 .

Please continue to refer to FIG. 5 . Along the circumferential direction of the body 31 , an included angle is formed between each two adjacent wing plates 32 , and the included angles are equal. Specifically, the adjacent wing plates 32 respectively form a first included angle α1, a second included angle α2, and a third included angle α3. The first included angle α1, the second included angle α2, and the third included angle α3 are mutually exclusive. roughly equal to each other.

It can be understood that since the first included angle α1, the second included angle α2 and the third included angle α3 are approximately equal to each other, if the main body 31 is not provided with the reducing portion 314, the flow areas of each flow channel should be equal. In the embodiment of the present disclosure, on the basis that the included angles are equal, by providing the variable diameter portion 314, the flow area of the flow channel corresponding to the variable diameter portion 314 can be directly changed.

The number of wing plates 32 may be multiple, such as two, three or more.

In this embodiment, the number of wing plates 32 is three, and the three wing plates 32 are evenly arranged along the circumferential direction of the body 31 , that is, the first included angle α1 , the second included angle α2 and the third included angle α3 are respectively equal. . The flow channel corresponding to the first included angle α1 is the first flow channel 61, the flow channel corresponding to the second included angle α2 is the second flow channel 62, and the flow channel corresponding to the third included angle α3 is the third flow channel 63.

The number of the reducing portions 314 is two, and the two reducing portions 314 are respectively disposed in two adjacent flow channels. For example, one of the reducing portions 314 is disposed corresponding to the second flow channel 62 , and the other reducing portion 314 is disposed corresponding to the third flow channel 63 .

Of course, the number of the reducing portions 314 can also be three, and the three reducing portions 314 are respectively provided in the first flow channel 61 , the second flow channel 62 and the third flow channel 63 . Since the flow areas of the three flow channels need to be consistent, the distances between the outer walls of the three reducing portions 314 and the axes of the body 31 need to be consistent. For example, when the reducing portion 314 is configured as a tangential surface, the distance between one of the tangential surfaces and the axis of the body 31 is different from at least one of the other tangential surfaces, thus ensuring that at least two of the three flow channels are present. The circulation area is different.

In other embodiments, the number of the reducing portion 314 may be one, so that the flow area of the flow channel corresponding to the reducing portion 314 is different from the flow areas of other adjacent flow channels.

In other embodiments, the first included angle α1, the second included angle α2, and the third included angle α3 may also be unequal to each other. For example, the distance between two adjacent wing plates 32 corresponding to the reducing portion 314 can be designed to be larger, and the distance between two wing plates 32 without the reducing portion 314 can be designed to be longer. Small.

As an example, the first included angle α1 is smaller than the second included angle α2, which can make the flow area of the second flow channel 62 much larger than the flow area of the first flow channel 61, thereby increasing the radial resultant force on the valve core 3. The size ensures that the valve core 3 can stably abut the inner cavity wall of the valve body 2.

As shown in FIG. 6 , FIG. 6 shows a schematic diagram of the valve core 3 according to another embodiment of the present disclosure. The similarities between the valve core 3 of this embodiment and the valve core 3 of the above embodiment will not be described again. The difference lies in that the diameter reducing portion 314 is configured as a protrusion 315 .

Specifically, the reducing portion 314 is configured as a protrusion 315 such that the distance between the outer wall of the protrusion 315 and the axis of the body 31 is larger than other positions of the body 31 , thereby reducing the distance corresponding to the protrusion 315 The flow area of the flow channel finally reaches multiple flow areas with different flow areas, so that the valve core 3 can resist the inner cavity wall of the valve body 2.

In one embodiment, the first included angle α1, the second included angle α2, and the third included angle α3 may be equal to each other. When the three included angles are equal, the flow area of the flow channel corresponding to the position where the protrusion 315 is provided is smaller than the flow area of other flow channels. In this embodiment, the flow area of the second flow channel 62 is smaller than the flow area of the first flow channel 61 , and the flow area of the second flow channel 62 is smaller than the flow area of the third flow channel 63 .

Of course, the first included angle α1, the second included angle α2 and the third included angle α3 may not be equal to each other. For example, the second included angle α2 is smaller than the first included angle α1, and the second included angle α2 is smaller than the third included angle α3. Since the second included angle α2 of the second flow channel 62 is the smallest, and the second flow channel 62 is also provided with a protrusion 315, the flow area of the second flow channel 62 is much smaller than the first flow channel 61 or the second flow channel 62. This further increases the magnitude of the radial resultant force experienced by the valve core 3 to ensure that the valve core 3 can stably abut against the inner cavity wall of the valve body 2 .

In addition, when the body 31 is provided with two or more reducing portions 314 , some of the reducing portions 314 can be cut surfaces, and some of the reducing portions 314 can be protrusions 315 .

In this embodiment, as shown in FIG. 6 , the second flow channel 62 corresponds to the protrusion 315 , the third flow channel 63 corresponds to the cut surface, and the first flow channel 61 is not provided with the reducing portion 314 .

It can be understood that the various embodiments/implementations provided by the present disclosure can be combined with each other without causing conflicts, and examples will not be given here one by one.

As shown in FIG. 7 , FIG. 7 shows a schematic diagram of a line segment formed after a virtual plane cuts the reducing part. In this embodiment, the outer wall surface of the reducing portion 314 and a virtual plane 7 form a line segment 71, and the radial distance H between each point on the line segment 71 and the axis L of the body 31 is not entirely equal, where the virtual plane 7 and The axis L of the body 31 is vertical.

That is to say, the virtual plane 7 cuts the reduced diameter portion 314 in a direction perpendicular to the axis L of the body 31, so that the outer wall surface of the reduced diameter portion 314 intersects with the virtual plane 7 to form a line segment 71, and each point on the line segment 71 is consistent with the axis. The radial distances H between L are not all equal.

It can be understood that the radial distance H between each point on the line segment 71 and the axis L may or may not be completely equal. When the radial distances H are all unequal, the radial distance H between each point on the line segment 71 and the axis L may gradually become larger or smaller. When the radial distances H are not all equal, the distance between the midpoint of the line segment 71 and the axis L can be The distance between the two ends of the line segment 71 may be the longest, and the distance between the two end points of the line segment 71 and the axis L may be equal.

It is worth mentioning that when the reducing portion 314 is a tangential plane, the line segment 71 can be a straight line. Of course, in some embodiments, the line segment 71 may also be a curve depending on the shape of the reducing portion 314 .

The advantages and beneficial effects of the valve core 3 and the one-way valve in the embodiment of the present disclosure at least include:

The reducing portion 314 is provided between two adjacent wings 32. By providing the reducing portion 314 on the body 31, the flow area of the flow channel corresponding to the reducing portion 314 is equal to the flow area of at least one other flow channel. The areas are not equal, because the flow channel with a larger flow area is subject to a greater fluid pressure, while the flow channel with a smaller flow area is subject to a smaller fluid pressure. When the fluid passes through the valve core 3, the valve core 3 will move along its diameter. The magnitude of the various forces received in the directional direction is inconsistent, resulting in an unbalanced force on the radial valve core 3 along the radial direction of the valve core 3, that is, the radial resultant force on the valve core 3 is not zero. Under the action of this radial resultant force, The valve core 3 will be biased in the direction of the radial resultant force, that is, the radial resultant force will cause the valve core 3 to abut the inner wall surface of the inner cavity of the valve body 2. In this way, the valve core 3 moves along the valve body in the valve body. When moving axially, one side of the valve core 3 continues to fit against the inner wall of the valve body, thereby preventing the valve core 3 from hitting the valve body 2 and causing noise.

In the disclosed embodiments, the terms "first", "second" and "third" are used for descriptive purposes only and shall not be understood as indicating or implying relative importance; the term "plurality" refers to two or two or more, unless otherwise expressly limited. The terms "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be Either directly or indirectly through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the disclosed embodiments can be understood according to specific circumstances.

In the description of the disclosed embodiments, it should be understood that the terms “upper”, “lower”, “left”, “right”, “front”, “back”, etc. indicate an orientation or positional relationship based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the disclosed embodiments and simplifying the description, and does not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the disclosed implementation. Example limitations.

In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in the disclosed implementation. in at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred embodiments of the disclosed embodiments, and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments may have various modifications and changes. Within the spirit and principles of the disclosed embodiments, all Any modifications, equivalent substitutions, improvements, etc. made shall be included in the protection scope of the disclosed embodiments.

Claims

A valve core of a one-way valve, which is characterized by including:

body, the side surface of the body has at least one reducing portion;

A plurality of wing plates protrudes from the side of the body and is spaced along the circumference of the body, with a flow channel formed between each two adjacent wing plates;

Wherein, the reducing portion is provided in at least one of the flow channels, so that the flow area of the flow channel corresponding to the reducing portion is not equal to the flow area of at least one of the remaining flow channels;

Wherein, the outer wall surface of the variable diameter part and a virtual plane form a line segment, the radial distance between each point on the line segment and the axis of the body is not exactly equal, and the virtual plane and the axis of the body Perpendicular to each other.
The valve core of the one-way valve according to claim 1, wherein the reducing portion is configured as a tangential plane so that the line segment is a straight line.
The valve core of the one-way valve according to claim 2, wherein the cut surface is parallel to the axis of the body.
The valve core of the one-way valve according to claim 2, characterized in that the body includes:

Equal-diameter section, the cut surface and the side surface of the equal-diameter section form a first straight line segment and a second straight line segment respectively;

A first variable diameter section is connected to one end of the equal diameter section, and the cross section forms a first arc segment with the side surface of the first variable diameter section; and

A second variable diameter section is connected to the other end of the equal diameter section, and the cross section forms a second arc segment with the side surface of the second variable diameter section;

Wherein, the first arc segment, the first straight line segment, the second arc segment and the second straight line segment are connected end to end in sequence.
The valve core of the one-way valve according to claim 4, wherein the wing plate is connected to the equal diameter section and the second variable diameter section, and one end of the wing plate protrudes from the The second variable diameter section is away from the end surface of the equal diameter section.
The valve core of the one-way valve according to claim 1, wherein the diameter reducing portion is configured as a protrusion.
The valve core of the one-way valve according to claim 1, characterized in that, along the circumferential direction of the body, an included angle is formed between each two adjacent wing plates, and each included angle equal.
The valve core of the one-way valve according to claim 1, wherein the number of the wing plates is three or more.
The valve core of a one-way valve according to claim 8, characterized in that the number of said wing plates is three, and the three said wing plates are evenly arranged along the circumferential direction of the said body;

The number of the reducing portions is two, and the two reducing portions respectively correspond to two adjacent flow channels.
A one-way valve, characterized by including:

valve body; and

The valve core of the one-way valve according to any one of claims 1 to 9, wherein the valve core is arranged in the valve body.
The one-way valve according to claim 10, wherein the valve body has a valve port, and the reducing portion of the valve core is provided at an end of the valve core body close to the valve port.