A valve core, control valve, thermal management system and vehicle

Abstract

This application provides a valve core, a control valve, a thermal management system, and a vehicle. The valve core includes a valve stem, which comprises a main body and an adjusting portion arranged axially. The adjusting portion extends at least partially into the valve port, allowing the control valve to have a closed state and a throttling state. The adjusting portion includes a guide surface and a throttling surface. In the throttling state, the guide surface abuts against the inner wall of the valve seat, and the throttling surface and the inner wall of the valve seat form a fluid channel for fluid passage. Because the guide surface abuts against the inner wall of the valve seat, the inner wall of the valve seat can provide support for the valve stem of the valve core, preventing the valve stem from high-frequency vibration caused by high-speed scouring from the fluid. This improves the overall stability of the valve core in the throttling state, ensures stable flow regulation function of the control valve, and extends the service life of the valve core and the control valve.

Description

Technical Field

[0001] This application belongs to the field of fluid control technology, specifically relating to a valve core, control valve, thermal management system, and vehicle. Background Technology

[0002] Throttling valves can adjust the throttling cross-section or throttling length by adjusting the gap between the valve core and the valve seat, thereby precisely controlling the fluid flow rate.

[0003] In practical applications, the fluid velocity passing through the valve core of the throttle valve is relatively high under throttling conditions. The high-speed fluid will cause a certain degree of scouring to the valve core, resulting in high-frequency vibration of the valve core. This not only affects the flow control of the throttle valve and reduces the reliability of the throttle valve, but also causes damage to the valve core and shortens the service life of the throttle valve after long-term use. Utility Model Content

[0004] This application aims to provide a valve core, control valve, thermal management system, and vehicle to solve the problem of severe vibration of the valve core in existing throttle valves under throttling conditions.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a valve core for use in a control valve. The control valve includes a valve seat having a valve port. The valve core includes a valve stem, which includes a main body portion and an adjusting portion arranged axially. The adjusting portion is configured to at least partially extend into the valve port, such that the control valve has a closed state and a throttling state.

[0007] The regulating part includes a guide surface and a throttling surface. In the throttling state, the regulating part extends into the valve seat, the guide surface abuts against the inner wall of the valve seat, and the throttling surface and the inner wall of the valve seat enclose a fluid channel for fluid passage. In the closed state, the regulating part blocks the valve port.

[0008] Optionally, the guide surface and the throttling surface are alternately arranged along the circumference of the adjusting part.

[0009] Optionally, the throttling surface is an oblique tangent surface set at an angle to the axial direction of the valve stem, and the guide surface is an arc surface set along the circumference of the valve stem.

[0010] Optionally, there may be multiple throttling surfaces, and the included angle between the multiple throttling surfaces and the axial direction of the valve stem is the same.

[0011] Optionally, there are multiple throttling surfaces, which are spaced apart circumferentially along the valve stem, and the guide surface is disposed between adjacent throttling surfaces.

[0012] Optionally, the valve stem further includes a limiting portion disposed between the main body and the adjusting portion. The limiting portion protrudes radially from the outer wall of the valve stem, and in the closed state, the limiting portion abuts against the valve port.

[0013] Optionally, the limiting portion is continuously arranged along the circumference of the valve stem to form a limiting ring.

[0014] Optionally, the limiting part includes a first sealing surface, which is disposed on the side of the limiting part near the adjusting part. In the closed state, the first sealing surface is sealed to the valve port.

[0015] Optionally, the first sealing surface is a plane extending radially outward along the valve stem.

[0016] Secondly, this application also discloses a control valve, the control valve including a valve seat and a valve core as described in any of the above claims, wherein the valve core is movably connected to the valve seat.

[0017] Optionally, the valve seat is provided with a valve cavity extending axially along the valve seat, the valve cavity having a valve port. In the closed state, the adjusting part extends into the valve cavity and blocks the valve port. In the throttling state, the guide surface abuts against the inner wall of the valve cavity, and the throttling surface and the inner wall of the valve cavity enclose a fluid channel for fluid passage.

[0018] Optionally, the valve core further includes a limiting part, the limiting part having a first sealing surface on the side near the valve seat, and the valve port having a second sealing surface. In the closed state, the first sealing surface and the second sealing surface are sealed together to seal the valve cavity.

[0019] Optionally, the control valve further includes a seal connected to at least one of the first sealing surface and the second sealing surface, wherein in the closed state, the seal is connected between the first sealing surface and the second sealing surface.

[0020] Thirdly, this application also discloses a thermal management system, which includes the valve core or control valve described in any of the above claims.

[0021] Fourthly, this application also discloses a vehicle that includes the valve core, control valve, or thermal management system described in any of the preceding claims.

[0022] In this embodiment, the valve stem has a guide surface and a throttling surface. In the throttling state, the throttling surface and the inner wall of the valve seat form a fluid channel for fluid passage, thereby realizing the throttling function of the control valve. In this state, when the fluid passes through the fluid channel, the guide surface abuts against the inner wall of the valve seat, and the inner wall of the valve seat can provide support for the valve stem of the valve core, preventing the valve stem from being subjected to high-speed scouring from the fluid and generating high-frequency vibration. This improves the overall stability of the valve core in the throttling state, ensuring the stable flow regulation function of the control valve. At the same time, since the high-frequency vibration of the valve stem is avoided, the overall structural strength of the valve core can be guaranteed, thereby extending the service life of the valve core and the control valve.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the valve core structure in an embodiment of this application;

[0026] Figure 2 This is a front view of the valve core in an embodiment of this application;

[0027] Figure 3 yes Figure 2 Schematic diagram of the A-A cross section;

[0028] Figure 4 This is a schematic diagram of the valve seat structure in an embodiment of this application;

[0029] Figure 5 This is a front view of the valve seat in an embodiment of this application;

[0030] Figure 6 yes Figure 5 Schematic diagram of the B-B cross section;

[0031] Figure 7 This is a schematic diagram of the control valve in the closed state in an embodiment of this application;

[0032] Figure 8 yes Figure 7 A cross-sectional view of the control valve in the middle;

[0033] Figure 9 yes Figure 7 Top view of the central control valve;

[0034] Figure 10 yes Figure 9 Schematic diagram of the C-C cross section;

[0035] Figure 11 yes Figure 9 Schematic diagram of the D-D cross section;

[0036] Figure 12 This is a schematic diagram of the control valve in the throttling state in the embodiments of this application;

[0037] Figure 13 yes Figure 12 A cross-sectional view of the control valve in the middle;

[0038] Figure 14 yes Figure 12 Top view of the central control valve;

[0039] Figure 15 yes Figure 14 Schematic diagram of the E-E cross section;

[0040] Figure 16 yes Figure 14 Schematic diagram of the F-F section.

[0041] Reference numerals: 1-valve core, 10-valve stem, 11-main body, 12-adjusting part, 121-guide surface, 122-throttling surface, 13-limiting part, 131-first sealing surface, 2-valve seat, 21-valve port, 22-valve cavity, 23-second sealing surface, 3-seal. Detailed Implementation

[0042] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0043] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] Throttling valves can precisely control fluid flow by adjusting the throttling cross-section or throttling length through regulating the gap between the valve core and the valve seat. Throttling valves have a wide range of applications; for example, in the thermal management system of new energy vehicles, they can be used in heat pumps to control the flow of the refrigerant throughout the circulation channel, and the precise flow regulation function can be achieved by adjusting the height of the valve core relative to the valve seat.

[0047] In practical applications, throttle valves operate in both closed and throttling modes. In the throttling mode, fluid can flow between the valve core and the valve seat. Common throttle valves use valve cores that mate with the valve seat, the portion of which is often conical. This design results in a small effective flow area for fluid passage. When the fluid velocity through the valve core is high, the high-speed fluid can cause significant scouring, leading to high-frequency vibrations. This not only affects the throttle valve's flow control and reduces its reliability, but prolonged use can also damage the valve core and shorten the valve's lifespan.

[0048] This application provides a valve core 1 to solve the problem of severe vibration in existing throttle valve cores under throttling conditions. Specifically, the valve core 1 provided in this application is applied to a control valve, and the control valve includes a valve seat 2 with a valve port 21.

[0049] Reference Figures 1 to 3This is a schematic diagram of the valve core 1 provided in an embodiment of this application, with reference to... Figures 4 to 6 This is a schematic diagram of the valve seat 2 provided in the embodiment of this application, with reference to... Figures 7 to 16 This is a schematic diagram of the valve core 1 and valve seat 2 mating according to an embodiment of this application. Figures 1 to 16 As shown, the valve core 1 includes a valve stem 10, which includes a main body 11 and an adjusting part 12 arranged axially. The adjusting part 12 is used to at least partially extend into the valve port 21 so that the control valve has a closed state and a throttling state. The adjusting part 12 includes an arc-shaped guide surface 121 and a sloped throttling surface 122. In the throttling state, the adjusting part 12 partially extends into the valve port 21, the guide surface 121 abuts against the inner wall of the valve seat 2, and the throttling surface 122 and the inner wall of the valve seat 2 enclose a fluid channel for fluid passage. In the closed state, the adjusting part 12 blocks the valve port 21, and the fluid channel is closed.

[0050] Specifically, the valve stem 10 is generally cylindrical in shape. The main body 11 is the main structure of the valve stem 10, and the adjusting part 12 is the component of the valve core 1 that realizes the throttling function, used to cooperate with the valve seat 2. When the adjusting part 12 is partially inserted into the valve seat 2, the valve port 21 of the valve seat 2 is in the open state, and the control valve is in the throttling state. In addition, the adjusting part 12 can also be fully inserted into the valve port 21 to block the valve port 21. When the adjusting part 12 is fully inserted into the valve seat 2, the valve port 21 of the valve seat 2 is blocked by the valve stem 10, the valve port 21 of the valve seat 2 is in the closed state, and the control valve is also in the closed state.

[0051] Along the axial direction of the valve stem 10, towards the end furthest from the main body 11, the size of the adjusting part 12 decreases. In specific applications, the throttling effect of the control valve can be achieved by changing the position of the valve core 1 relative to the valve seat 2, that is, by changing the length of the adjusting part 12 extending into the valve seat 2. Since the adjusting part 12 is smaller the further away from the main body 11 it is, the smaller the length of the adjusting part 12 extending into the valve seat 2, the greater the flow rate through the fluid channel. When it is necessary to reduce the fluid flow rate, this can be achieved by increasing the length of the adjusting part 12 extending into the valve seat 2.

[0052] Optionally, the guide surface and the throttling surface are alternately arranged along the circumference of the adjusting part. For example, in this embodiment, there are two guide surfaces and two throttling surfaces, and they are alternately arranged along the axial direction of the adjusting part. Further, when there are multiple guide surfaces and multiple throttling surfaces, the multiple guide surfaces can be configured with the same structure, and similarly, the multiple throttling surfaces can also be configured with the same structure to form multiple fluid channels with uniform flow, ensuring the uniformity and stability of fluid flow.

[0053] In the embodiments of this application, such as Figure 1As shown, the throttling surface 122 is a slanted plane that forms an angle with the axial direction of the valve stem 10, and the guide surface 121 is an arcuate surface that is arranged along the circumference of the valve stem 10. In this way, when at least a part of the adjusting part 12 extends into the valve seat 2, the guide surface 121 of the arcuate surface arranged along the axial direction of the valve stem 10 can abut against the inner wall of the valve seat 2, thereby guiding the mutual cooperation between the valve core 1 and the valve seat 2.

[0054] Specifically, the valve stem 10 has a cylindrical structure, and the throttling surface 122 is a cross-section formed by obliquely cutting one end of the valve stem 10. The outer peripheral side of the uncut portion of the valve stem 10 forms a guide surface 121. It can be understood that, since the valve stem 10 has a cylindrical structure, after obliquely cutting the valve stem 10, the remaining portion can still maintain a good fit and guiding effect with the inner wall of the valve seat 2.

[0055] Optionally, there are multiple throttling surfaces 122, and the included angles between the multiple throttling surfaces 122 and the axial direction of the valve stem 10 are the same. Each throttling surface 122 can form a fluid channel with the valve seat 2. Since the multiple throttling surfaces 122 have the same included angles with the axial direction of the valve stem 10, the flow rate among the multiple fluid channels formed by the throttling surfaces 122 is more uniform when the control valve is in a throttling state. This helps to improve the stability of fluid flow in the control valve under throttling conditions.

[0056] Understandably, when the included angles between the multiple throttling surfaces 122 and the axial direction of the valve stem 10 are the same, that is, when the area of ​​the fluid channel formed by the throttling surfaces 122 and the inner wall of the valve seat 2 is also the same, when the fluid flows from one side of the main body 11 to the fluid channel, it can be more evenly distributed into the multiple fluid channels, thereby ensuring the stability of the valve core 1 in the throttling state and realizing a stable flow regulation function.

[0057] Optionally, there are multiple throttling surfaces 122, which are spaced apart along the circumference of the valve stem 10, and the guide surface 121 is disposed between adjacent throttling surfaces 122.

[0058] In this embodiment, there are two throttling surfaces 122, which are symmetrically arranged on both sides of the adjusting part 12 about the axial direction of the valve stem 10. Each of the two throttling surfaces 122 forms a fluid channel with the inner wall of the valve seat 2. Correspondingly, there are also two guide surfaces 121, located between the two throttling surfaces 122, which are also symmetrically arranged about the axial direction of the valve stem 10. Thus, the two guide surfaces 121 on both radial sides of the valve stem 10 provide a more balanced support for the entire valve core 1. Even when the fluid is flowing at high speed, the stability of the fluid flow is ensured, improving the stability of the fluid flow rate, guaranteeing the stable flow regulation function of the control valve, and preventing the entire valve core 1 structure from being affected by the shaking of the adjusting part 12.

[0059] Optionally, the valve core 1 also includes a limiting part 13, which is disposed between the main body 11 and the adjusting part 12. The limiting part 13 protrudes radially from the outer wall of the valve stem 10. In the closed state, the limiting part 13 abuts against the valve port 21 to limit the valve core 1 and ensure the relative position between the main body 11 and the valve seat 2.

[0060] It should be noted that in the related technology, the throttle valve seals the valve cavity 22 by abutting the conical throttling surface 122 against the valve seat 2 valve port 21. In this structure, to achieve a better sealing effect, the machining and assembly precision requirements for the valve port 21 of the valve seat 2 and the throttling surface 122 of the valve core 1 are relatively high. However, since the valve core 1 needs to simultaneously perform multiple functions such as throttling, guiding, and sealing, the structure of the throttling surface 122 of the valve core 1 is not easy to maintain and is prone to failure, affecting the sealing effect and leading to the failure of the control valve to block fluid flow when closed. In this embodiment, by providing a limiting part 13 that protrudes radially from the outer wall of the valve stem 10, the valve core 1 can seal the valve port 21 by abutting the limiting part 13 against the valve port 21. The regulating part 12 no longer needs to perform the sealing function of the valve cavity 22 of the valve seat 2, which not only helps to ensure the structural reliability of the regulating part 12 but also ensures the sealing effect of the valve cavity 22.

[0061] Specifically, such as Figures 1 to 3 As shown, the limiting part 13 is located at the top of the throttling surface 122. That is, the top of the throttling surface 122 and the bottom of the limiting part 13 are in the same plane. In this way, when the limiting part 13 abuts against the valve port 21 of the valve seat 2, the entire adjusting part 12 is located inside the valve cavity 22 of the valve seat 2, which reduces the size waste of the adjusting part 12 and also helps to improve the flexibility of the axial dimension of the valve seat 2.

[0062] Furthermore, the limiting part 13 is continuously arranged along the circumference of the valve stem 10 to form a limiting ring. The continuous limiting ring structure can ensure the limiting of the valve core 1 and the sealing effect on the valve seat 2 in the circumference of the valve stem 10.

[0063] In practical applications, since the limiting part 13 abuts against the valve port 21 when closed, the limiting part 13 can not only limit the movement of the valve core 1, but also seal the valve cavity 22 inside the valve seat 2 when it abuts against the valve port 21. When the limiting part 13 is continuously arranged along the axial direction of the valve stem 10, the limiting part 13 can abut against the valve port 21 of the valve seat 2 in all directions, thus improving the sealing effect of the limiting part 13 on the valve seat 2.

[0064] Optionally, the limiting part 13 includes a first sealing surface 131, which is disposed on the side of the limiting part 13 near the adjusting part 12. In the closed state, the first sealing surface 131 is sealed to the valve port 21 to seal the valve seat 2 valve cavity 22 and block the flow of fluid in the fluid channel.

[0065] Specifically, the first sealing surface 131 is a plane extending radially outward along the valve stem 10. This planar structure is easier to process and easier to cooperate with other structures such as the valve seat 2 or the seal 3.

[0066] It should be noted that by providing a first sealing surface 131 in the limiting part 13, the sealing contact area between the valve core 1 and the valve seat 2 is increased, thereby enhancing the sealing effect. At the same time, the first sealing surface 131 can be used to set the sealing element 3 or to coat the sealing layer, thereby further optimizing the sealing performance and ensuring that a stable sealing state is maintained under long-term operation and complex working conditions.

[0067] In summary, the valve core 1 provided in this application embodiment may include at least the following advantages:

[0068] In this embodiment, the valve stem has a guide surface and a throttling surface. In the throttling state, the throttling surface and the inner wall of the valve seat form a fluid channel for fluid passage, thereby realizing the throttling function of the control valve. In this state, when the fluid passes through the fluid channel, the guide surface abuts against the inner wall of the valve seat, and the inner wall of the valve seat can provide support for the valve stem of the valve core, preventing the valve stem from being subjected to high-speed scouring from the fluid and generating high-frequency vibration. This improves the overall stability of the valve core in the throttling state, ensuring the stable flow regulation function of the control valve. At the same time, since the high-frequency vibration of the valve stem is avoided, the overall structural strength of the valve core can be guaranteed, thereby extending the service life of the valve core and the control valve.

[0069] like Figures 7 to 16 As shown in the figure, this application embodiment also provides a control valve, which includes a valve seat 2 and a valve core 1 as described in any of the above claims, wherein the valve core 1 is movably connected to the valve seat 2. Because the valve core 1 has a guide surface 121 that abuts against the inner wall of the valve seat 2 in a throttling state, the valve core 1 can maintain a stable throttling state, improving the stability of fluid regulation in the control valve.

[0070] Furthermore, a valve cavity 22 extending axially along the valve seat 2 is provided inside the valve seat 2. The valve cavity 22 has a valve port 21. In the closed state, the adjusting part 12 extends into the valve cavity 22 and blocks the valve port 21. In the throttling state, the guide surface 121 abuts against the inner wall of the valve cavity 22. The throttling surface 122 and the inner wall of the valve cavity 22 enclose each other to form a fluid channel for fluid passage.

[0071] Reference Figures 7 to 11 This is a schematic diagram of the control valve in the closed state. (Refer to...) Figures 12 to 16 This is a schematic diagram of a control valve in a throttling state. For example... Figures 7 to 11 As shown, in the closed state, the regulating part 12 is fully inserted into the valve chamber 22, the throttling surface 122 abuts against the valve port 21, and the valve port 21 is in the closed state. At this time, fluid cannot flow in the fluid channel; as Figures 12 to 16 As shown, in the throttling state, only a portion of the regulating part 12 extends into the valve cavity 22. At this time, the guide surface 121 abuts against the cavity wall of the valve cavity 22, providing some support for the regulating part 12 and the entire valve core 1. The throttling surface 122 is spaced from the valve port 21 of the valve cavity 22, and the valve port 21 is in the open state, allowing fluid to enter the fluid channel of the valve cavity 22 through the valve port 21. By changing the depth of the regulating part 12 extending into the valve cavity 22, the opening degree of the valve port 21 and the cross-sectional area of ​​the fluid channel in the radial direction of the valve stem 10 can be adjusted, thereby achieving different throttling effects.

[0072] Optionally, the valve core 1 also includes a limiting part 13, which has a first sealing surface 131 on the side near the valve seat 2 and a second sealing surface 23 on the valve port 21. In the closed state, the first sealing surface 131 and the second sealing surface 23 are sealed together to seal the valve cavity 22.

[0073] In this embodiment, the first sealing surface 131 and the second sealing surface 23 are adapted to each other. Both the first sealing surface 131 and the second sealing surface 23 are sealing planes. The sealing connection between the first sealing surface 131 and the second sealing surface 23 increases the sealing contact area, effectively preventing fluid leakage when the control valve is closed. Simultaneously, this sealing connection via sealing surfaces eliminates the need for the adjusting part 12 to perform the sealing function of the valve cavity 22, reducing the machining precision of the adjusting part 12, thus lowering production costs and improving production efficiency.

[0074] In one optional embodiment of this application, the control valve further includes a seal 3, which is connected to at least one of the first sealing surface 131 and the second sealing surface 23. In the closed state, the seal 3 is connected between the first sealing surface 131 and the second sealing surface 23.

[0075] Optionally, the seal 3 can be disposed on the first sealing surface 131, or on the second sealing surface 23, or both the first sealing surface 131 and the second sealing surface 23 can be provided with the seal 3. The first sealing surface 131 and the second sealing surface 23 can be provided with annular sealing grooves, and the seal 3 can be annular and embedded in the annular sealing grooves. It should be noted that the material of the seal 3 can be rubber, silicone, plastic, or composite materials, etc., and this application does not specifically limit this. However, it should be noted that in order to ensure the sealing effect and service life, the seal 3 should be selected from materials with high wear resistance and corrosion resistance, and the elasticity and rigidity requirements of the seal 3 should be comprehensively considered.

[0076] This application also provides a thermal management system, which includes the valve core 1 or control valve described in any of the above claims.

[0077] This application also provides a vehicle, which includes the valve core 1, control valve, or thermal management system described in any of the above embodiments.

[0078] It should be noted that in this embodiment, the structure of the valve core is the same as that of the valve core in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spool for use in a control valve, the control valve including a valve seat having a valve port, characterized by, The valve core includes a valve stem, which comprises a main body portion and an adjusting portion arranged axially. The adjusting portion is configured to at least partially extend into the valve port, such that the control valve has a closed state and a throttling state; wherein... The regulating part includes a guide surface and a throttling surface. In the throttling state, the regulating part extends partially into the valve seat, the guide surface abuts against the inner wall of the valve seat, and the throttling surface and the inner wall of the valve seat enclose a fluid channel for fluid passage. In the closed state, the regulating part blocks the valve port. The valve stem has a cylindrical structure. The throttling surface is a cut surface formed by obliquely cutting one end of the valve stem, and the guide surface is formed by the outer peripheral side of the uncut portion of the valve stem. The throttling surface is an oblique cut surface set at an angle to the axial direction of the valve stem, and the guide surface is an arc surface set along the circumference of the valve stem. The valve stem further includes a limiting portion disposed between the main body and the adjusting portion. The limiting portion protrudes radially from the outer wall of the valve stem. In the closed state, the limiting portion abuts against the valve port. The limiting portion includes a first sealing surface disposed on the side of the limiting portion near the adjusting portion. In the closed state, the first sealing surface is sealed to the valve port. The first sealing surface is a plane extending radially outward from the valve stem.

2. The valve core according to claim 1, characterized in that The guide surface and the throttling surface are alternately arranged along the circumference of the adjustment part.

3. The valve core of claim 1, wherein The number of throttling surfaces is multiple, and the included angle between the multiple throttling surfaces and the axial direction of the valve stem is the same.

4. The valve core of claim 1, wherein The number of throttling surfaces is multiple, and the multiple throttling surfaces are arranged at intervals along the circumference of the valve stem, and the guide surface is arranged between adjacent throttling surfaces.

5. The valve core of claim 1, wherein The limiting part is continuously arranged along the circumference of the valve stem to form a limiting ring.

6. A control valve characterized by The control valve includes a valve seat and a valve core as described in any one of claims 1 to 5, wherein the valve core is movably connected to the valve seat.

7. The control valve according to claim 6, characterized in that The valve seat has a valve cavity extending axially along the valve seat. The valve cavity has a valve port. In the closed state, the adjusting part extends into the valve cavity and blocks the valve port. In the throttling state, the guide surface abuts against the inner wall of the valve cavity. The throttling surface and the inner wall of the valve cavity enclose a fluid channel for fluid passage.

8. The control valve according to claim 7, characterized in that The valve core also includes a limiting part, which has a first sealing surface on the side near the valve seat and a second sealing surface on the valve port. In the closed state, the first sealing surface and the second sealing surface are sealed together to seal the valve cavity.

9. The control valve of claim 8, wherein, The control valve further includes a seal, which is connected to at least one of the first sealing surface and the second sealing surface. In the closed state, the seal is connected between the first sealing surface and the second sealing surface.

10. A thermal management system characterized by, The thermal management system includes: a valve core as described in any one of claims 1 to 5, or a control valve as described in any one of claims 6 to 9.

11. A vehicle characterized by comprising: The vehicle comprises the spool according to any one of claims 1 to 5, or the control valve according to any one of claims 6 to 9, or the thermal management system according to claim 10.

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