Valve element, control valve, heat management system and vehicle

Abstract

The embodiment of the invention provides a valve element, a control valve, a heat management system and a vehicle, the valve element comprises a valve rod, the valve rod comprises a main body part and an adjusting part which are arranged in the axial direction, and the adjusting part is used for at least partially stretching into a valve port so that the control valve can have a closed state and a throttling state; the adjusting part comprises a guide face and a throttling face, in the throttling state, the guide face abuts against the inner wall of the valve seat, and the throttling face and the inner wall of the valve seat define a fluid channel for fluid to pass through. Due to the fact that the guide face abuts against the inner wall of the valve seat, the inner wall of the valve seat can support the valve rod of the valve element, the valve rod is prevented from being scoured by fluid at a high speed to generate high-frequency shaking, the overall stability of the valve element in the throttling state is improved, and the stable flow adjusting function of the control valve is guaranteed. And the service lives of the valve core and the control valve are prolonged.

Description

Technical Field

[0001] The present application belongs to the field of fluid control technology, and specifically relates to a valve core, a control valve, a thermal management system and a vehicle. Background Art

[0002] The throttle valve can adjust the gap between the valve core and the valve seat to adjust the throttling section or throttling length, thereby accurately controlling the fluid flow rate.

[0003] In actual applications, the fluid flow rate through the throttle valve core under throttling conditions is relatively high. The high-speed fluid will cause a certain intensity of scouring on the valve core, resulting in high-frequency jitter of the valve core. This will not only affect the throttle valve's control of the fluid flow and reduce the reliability of the throttle valve, but also cause damage to the valve core over a long period of time and shorten the service life of the throttle valve. Summary of the invention

[0004] The present application aims to provide a valve core, a control valve, a thermal management system and a vehicle to solve the problem that the existing throttle valve core vibrates severely in the throttling state.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a valve core, which is applied to a control valve, wherein the control valve comprises a valve seat, the valve seat has a valve port, the valve core comprises a valve stem, the valve stem comprises a main body portion and an adjusting portion arranged along the axial direction, the adjusting portion is used to at least partially extend into the valve port, so that the control valve has a closed state and a throttling state; wherein,

[0007] The regulating part includes a guide surface and a throttling surface. In the throttling state, the regulating part partially 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 to pass through; 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 regulating portion.

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

[0010] Optionally, there are multiple throttling surfaces, and the angles between the multiple throttling surfaces and the axial direction of the valve stem are the same.

[0011] Optionally, there are multiple throttling surfaces, 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.

[0012] Optionally, the valve stem further includes a limiting portion, which is disposed between the main body and the adjusting portion, and which protrudes from an outer wall of the valve stem in a radial direction of the valve stem. 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 and forms a limiting ring.

[0014] Optionally, the limiting portion includes a first sealing surface, which is arranged on a side of the limiting portion close to the regulating portion, and in the closed state, the first sealing surface is sealed and connected to the valve port.

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

[0016] In a second aspect, the present application further discloses a control valve, comprising a valve seat and a valve core as described in any one of the above items, wherein the valve core is movably connected to the valve seat.

[0017] Optionally, a valve cavity extending axially along the valve seat is provided in the valve seat, and the valve cavity has a valve port. In the closed state, the regulating portion 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 to pass through.

[0018] Optionally, the valve core also includes a limiting portion, which is provided with a first sealing surface on a side close to the valve seat, and the valve port is provided with a second sealing surface, and in the closed state, the first sealing surface is sealingly connected to the second sealing surface to seal the valve cavity.

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

[0020] In a third aspect, the present application further discloses a thermal management system, which comprises the valve core or control valve as described in any one of the above items.

[0021] In a fourth aspect, the present application further discloses a vehicle, comprising the valve core, control valve or thermal management system as described in any one of the above items.

[0022] In the embodiment of the present application, 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 are combined to form a fluid channel for the passage of fluid to realize the throttling function of the control valve. In this state, when the fluid passes through the fluid channel, since 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, thereby preventing the valve stem from high-frequency jitter caused by high-speed erosion from the fluid, thereby improving the overall stability of the valve core in the throttling state and ensuring the stable flow regulation function of the control valve. At the same time, since high-frequency jitter 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 the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of the valve core in the embodiment of the present application;

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

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

[0028] Figure 4 It is a structural schematic diagram of the valve seat in the embodiment of the present application;

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

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

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

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

[0033] Fig. 9 yes Figure 7 A top view of the middle control valve;

[0034] Fig.10 yes Fig. 9 Schematic diagram of the C-C section;

[0035] Fig.11 yes Fig. 9 Schematic diagram of the D-D section;

[0036] Fig.12 is a schematic diagram of the structure of the control valve in the throttling state in an embodiment of the present application;

[0037] Fig.13 yes Fig.12 A cross-sectional view of the control valve;

[0038] Fig.14 yes Fig.12 A top view of the middle control valve;

[0039] Fig.15 yes Fig.14 Schematic diagram of the E-E section;

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

[0041] Figure 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 - sealing member. DETAILED DESCRIPTION

[0042] Embodiments of the present invention will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The throttle valve can adjust the gap between the valve core and the valve seat to adjust the throttle section or throttle length, thereby accurately controlling the fluid flow. The throttle valve has a wide range of applications. For example, in the thermal management system of new energy vehicles, the throttle valve can be used in the heat pump to throttle and open and close the refrigerant medium in the entire circulation channel, and the height of the valve core relative to the valve seat can be used to achieve the precise flow regulation function of the entire throttle valve.

[0047] In practical applications, the throttle valve has a closed condition and a throttling condition. In the throttling condition, the fluid can flow between the valve core and the valve seat. The common throttle valve is used for the valve core that cooperates with the valve seat. The part inside the valve seat is mostly conical. Under this structure, the effective flow area for fluid circulation is small. When the fluid flow rate through the valve core is high, the high-speed fluid will cause a certain intensity of scouring to the valve core, causing the valve core to vibrate at a high frequency. This will not only affect the throttle valve's control of the fluid flow rate and reduce the reliability of the throttle valve, but also cause damage to the valve core after long-term use, shortening the service life of the throttle valve.

[0048] The embodiment of the present application provides a valve core 1 to solve the problem that the existing throttle valve core 1 shakes severely in the throttling state. The valve core 1 provided in the embodiment of the present application is applied to a control valve, specifically, the valve core 1 is applied to a throttle valve, and the control valve includes a valve seat 2, and the valve seat 2 has a valve port 21.

[0049] Reference Figures 1 to 3 , which is a schematic diagram of the structure of the valve core 1 provided in the embodiment of the present application, referring to Figures 4 to 6 , which is a schematic diagram of the structure of the valve seat 2 provided in the embodiment of the present application, referring to Figures 7 to 16 , is a schematic diagram of the cooperation between the valve core 1 and the valve seat 2 provided in the embodiment of the present application, as shown Figures 1 to 16 As shown, the valve core 1 includes a valve stem 10, and the valve stem 10 includes a main body portion 11 and an adjusting portion 12 arranged along the axial direction. The adjusting portion 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; wherein the adjusting portion 12 includes an arc-shaped guide surface 121 and an inclined throttling surface 122; in the throttling state, the adjusting portion 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 to pass through; in the closed state, the adjusting portion 12 blocks the valve port 21, and the fluid channel is closed.

[0050] Specifically, the valve stem 10 is a generally cylindrical structure as a whole, wherein the main body 11 is the main structure of the valve stem 10, and the regulating part 12 is a component of the valve core 1 to realize the throttling function, and is used to cooperate with the valve seat 2. When the regulating part 12 partially extends into the valve seat 2, the valve port 21 of the valve seat 2 is in an open state, and the control valve is in a throttling state. In addition, the regulating part 12 can also be fully extended into the valve port 21 to block the valve port 21. When the regulating part 12 is fully extended 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 a closed state, and the control valve is also in a closed state.

[0051] Among them, the size of the regulating portion 12 decreases along the axial direction of the valve stem 10 toward the end away from the main body 11. In a specific application, the control valve can achieve a throttling effect by changing the position of the valve core 1 relative to the valve seat 2, that is, changing the length of the regulating portion 12 of the valve core 1 extending into the valve seat 2. Since the regulating portion 12 is smaller as it is farther away from the main body 11, the flow rate through the fluid channel is larger when the length of the regulating portion 12 extending into the valve seat 2 is smaller. When the fluid flow rate needs to be reduced, it can be achieved by increasing the length of the regulating portion 12 extending into the valve seat 2.

[0052] Optionally, the guide surface and the throttle surface are alternately arranged along the circumference of the regulating portion. For example, in the embodiment of the present application, the number of the guide surface and the throttle surface are both two, and the guide surface and the throttle surface are alternately arranged along the axial direction of the regulating portion. Further, when the number of the guide surface and the throttle surface are both multiple, the multiple guide surfaces can be set to the same structure, and similarly, the multiple throttle surfaces are also set to the same structure to form multiple fluid channels with uniform flow rates, thereby ensuring uniformity and stability of fluid circulation.

[0053] In the present application embodiment, Figure 1As shown, the throttling surface 122 is an oblique plane set at an angle to the axial direction of the valve stem 10, and the guide surface 121 is an arc surface set along the circumference of the valve stem 10. In this way, when at least part of the adjusting portion 12 extends into the valve seat 2, the guide surface 121 of the arc surface set along the axial direction of the valve stem 10 can abut against the inner wall of the valve seat 2, thereby playing a guiding role in the mutual cooperation between the valve core 1 and the valve seat 2.

[0054] Specifically, the valve stem 10 is a cylindrical structure, the throttling surface 122 is a section formed by chamfering one end of the valve stem 10, and the outer peripheral side surface of the uncut portion of the valve stem 10 forms the guide surface 121. It can be understood that since the valve stem 10 is a cylindrical structure, after the valve stem 10 is chamfered, 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 angles between the multiple throttling surfaces 122 and the axial direction of the valve stem 10 are the same, and each throttling surface 122 can enclose a fluid channel with the valve seat 2. Since the multiple throttling surfaces 122 have the same angles with the axial direction of the valve stem 10, when the control valve is in a throttling state, the flow rates between the multiple fluid channels formed by the throttling surfaces 122 are more uniform, which helps to improve the stability of the fluid flow of the control valve in the throttling state.

[0056] It can be understood that when the angles between multiple throttling surfaces 122 and the axial direction of the valve stem 10 are the same, that is, the area of ​​the fluid channel formed by the throttling surface 122 and the inner wall of the valve seat 2 is also the same. In this way, when the fluid flows from one side of the main body 11 to the fluid channel, it can be more evenly diverted to 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 , and the multiple throttling surfaces 122 are arranged at intervals along the circumference of the valve stem 10 , and the guide surface 121 is arranged between adjacent throttling surfaces 122 .

[0058] In the embodiment of the present application, there are two throttling surfaces 122, which are symmetrically arranged on both sides of the regulating part 12 about the axial direction of the valve stem 10. The two throttling surfaces 122 are respectively enclosed with the inner wall of the valve seat 2 to form a fluid channel. Correspondingly, there are also two guide surfaces 121, which are located between the two throttling surfaces 122, and the two guide surfaces 121 are also symmetrically arranged about the axial direction of the valve stem 10. In this way, the two guide surfaces 121 on both sides of the valve stem 10 in the radial direction play a more balanced supporting role on the entire valve core 1, and even if the fluid is in a high-speed flow state, the stability of the fluid circulation can be guaranteed, the stability of the fluid flow rate can be improved, the stable flow regulation function of the control valve can be guaranteed, and the shaking of the regulating part 12 can be prevented from affecting the structure of the entire valve core 1.

[0059] Optionally, the valve core 1 also includes a limiting portion 13, which is arranged between the main body 11 and the adjusting portion 12. The limiting portion 13 protrudes from the outer wall of the valve stem 10 in the radial direction of the valve stem 10. In the closed state, the limiting portion 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 the throttle valve in the related art achieves the sealing of the valve cavity 22 by abutting the conical throttle surface 122 with the valve port 21 of the valve seat 2. Under this structure, in order to achieve a better sealing effect, the processing accuracy and assembly accuracy of the valve port 21 of the valve seat 2 and the throttle surface 122 of the valve core 1 are relatively high. However, since the valve core 1 needs to assume multiple functions such as throttling, guiding and sealing at the same time, the structure of the throttle surface 122 of the valve core 1 is not easy to maintain and is easy to fail, affecting the sealing effect, thereby causing the control valve to fail to block the fluid in the closed state. In the embodiment of the present application, by providing a limit portion 13 protruding from the outer wall of the valve stem 10 along the radial direction of the valve stem 10, the valve core 1 can achieve the blocking of the valve port 21 by abutting the limit portion 13 with the valve port 21, and the regulating portion 12 no longer needs to assume the sealing function of the valve cavity 22 of the valve seat 2, which is not only conducive to ensuring the structural reliability of the regulating portion 12, but also ensures the sealing effect of the valve cavity 22.

[0061] Specifically, Figures 1 to 3 As shown, the limiting portion 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 portion 13 are located in the same plane. In this way, when the limiting portion 13 abuts against the valve port 21 of the valve seat 2, the entire adjusting portion 12 is located inside the valve cavity 22 of the valve seat 2, which reduces the size waste of the adjusting portion 12 and is also beneficial to improving the flexibility of the axial size of the valve seat 2.

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

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

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

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

[0066] It should be noted that, by providing the first sealing surface 131 on the limiting portion 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 provide a sealing member 3 or coat a sealing layer, thereby further optimizing the sealing performance and ensuring that a stable sealing state can be maintained under long-term operation and complex working conditions.

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

[0068] In the embodiment of the present application, 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 are combined to form a fluid channel for the passage of fluid to realize the throttling function of the control valve. In this state, when the fluid passes through the fluid channel, since 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, thereby preventing the valve stem from high-frequency jitter caused by high-speed erosion from the fluid, thereby improving the overall stability of the valve core in the throttling state and ensuring the stable flow regulation function of the control valve. At the same time, since high-frequency jitter 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, the embodiment of the present application further provides a control valve, which includes a valve seat 2 and a valve core 1 as described in any one of the above items, wherein the valve core 1 is movably connected to the valve seat 2. Since the valve core 1 has a guide surface 121 abutting against the inner wall of the valve seat 2 in the throttling state, the valve core 1 can maintain a stable throttling state, thereby improving the stability of the fluid regulation of the control valve.

[0070] Furthermore, a valve cavity 22 extending along the axial direction of the valve seat 2 is provided in the valve seat 2, and the valve cavity 22 has a valve port 21. In the closed state, the regulating portion 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, and the throttling surface 122 and the inner wall of the valve cavity 22 enclose a fluid channel for fluid to pass through.

[0071] Reference Figures 7 to 11 , which is a schematic diagram of the control valve in the closed state, refer to Figures 12 to 16 , is a schematic diagram of the control valve in the throttling state. Figures 7 to 11 As shown, in the closed state, the regulating portion 12 is completely inserted into the valve cavity 22, the throttling surface 122 abuts against the valve port 21, and the valve port 21 is in a closed state. At this time, the fluid cannot flow in the fluid channel; Figures 12 to 16 As shown, in the throttling state, only a part 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 to provide a certain 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. The valve port 21 is in an open state, and the fluid can enter the fluid channel of the valve cavity 22 through the valve port 21. By changing the depth dimension of the regulating part 12 extending into the valve cavity 22, the opening 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 portion 13, which is provided with a first sealing surface 131 on a side close to the valve seat 2, and the valve port 21 is provided with a second sealing surface 23. In a closed state, the first sealing surface 131 is sealedly connected to the second sealing surface 23 to seal the valve cavity 22.

[0073] Among them, the first sealing surface 131 is matched with the second sealing surface 23. In the embodiment of the present application, the first sealing surface 131 and the second sealing surface 23 are both sealing planes. The sealing contact area is increased through the sealing connection between the first sealing surface 131 and the second sealing surface 23, and the leakage of the fluid in the closed state of the control valve is effectively avoided. At the same time, this method of sealing connection through the sealing surface makes it unnecessary for the regulating part 12 to bear the sealing function of the valve cavity 22, and the processing accuracy of the regulating part 12 can be reduced, which is conducive to reducing production costs and improving production efficiency.

[0074] In an optional embodiment of the present 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 a 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 arranged 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 are provided with the seal 3. Among them, an annular sealing groove can be arranged on the first sealing surface 131 and the second sealing surface 23, and the seal 3 can be an annular structure and embedded in the annular sealing groove. It should be noted that the material of the seal 3 can be rubber, silicone, plastic or composite material, etc., and this application does not make specific restrictions on this, but it should be noted that in order to ensure the sealing effect and service life, the seal 3 should be selected from a material with high wear resistance and corrosion resistance, and the elasticity and rigidity requirements of the seal 3 need to be comprehensively considered.

[0076] An embodiment of the present application further provides a thermal management system, which includes the valve core 1 or the control valve described in any one of the above items.

[0077] An embodiment of the present application further provides a vehicle, comprising the valve core 1, control valve or thermal management system as described in any one of the above.

[0078] It should be noted that in the embodiment of the present application, the structure of the valve core is the same as the structure of the valve core in any of the above embodiments, and its beneficial effects are also similar, which will not be elaborated here.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A valve core, applied to a control valve, the control valve comprising a valve seat, the valve seat having a valve port, characterized in that: The valve core includes a valve stem, and the valve stem includes a main body portion and an adjusting portion arranged along the axial direction, and the adjusting portion is used to at least partially extend into the valve port so 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 partially 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 to pass through; in the closed state, the regulating part blocks the valve port.

2. The valve core according to claim 1, characterized in that: The guide surface and the throttling surface are alternately arranged along the circumferential direction of the regulating portion.

3. The valve core according to claim 1, characterized in that: The throttling surface is an oblique cut surface arranged at an angle with the axial direction of the valve stem, and the guide surface is an arc surface arranged along the circumference of the valve stem.

4. The valve core according to claim 3, characterized in that: There are multiple throttling surfaces, and the angles between the multiple throttling surfaces and the axial direction of the valve stem are the same.

5. The valve core according to claim 3, characterized in that: There are multiple throttling surfaces, 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.

6. The valve core according to claim 1, characterized in that: The valve stem further includes a limiting portion, which is disposed between the main body and the adjusting portion. The limiting portion protrudes from an outer wall of the valve stem in a radial direction of the valve stem. In the closed state, the limiting portion abuts against the valve port.

7. The valve core according to claim 6, characterized in that: The limiting portion is continuously arranged along the circumference of the valve stem to form a limiting ring.

8. The valve core according to claim 6, characterized in that: The limiting portion comprises a first sealing surface, which is arranged at a side of the limiting portion close to the regulating portion. In the closed state, the first sealing surface is sealed and connected to the valve port.

9. The valve core according to claim 8, characterized in that: The first sealing surface is a plane extending radially outward from the valve stem.

10. A control valve, characterized in that: The control valve comprises a valve seat and a valve core according to any one of claims 1 to 9, wherein the valve core is movably connected to the valve seat.

11. The control valve according to claim 10, characterized in that A valve cavity extending along the axial direction of the valve seat is provided in the valve seat, and the valve cavity has a valve port. In the closed state, the regulating portion 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 to pass through.

12. The control valve according to claim 11, characterized in that The valve core also includes a limiting portion, which is provided with a first sealing surface on a side close to the valve seat, and the valve port is provided with a second sealing surface. In the closed state, the first sealing surface is sealingly connected to the second sealing surface to seal the valve cavity.

13. The control valve according to claim 12, characterized in that The control valve further includes a sealing member connected to at least one of the first sealing surface and the second sealing surface. In the closed state, the sealing member is connected between the first sealing surface and the second sealing surface.

14. A thermal management system, characterized in that: The thermal management system comprises: the valve core according to any one of claims 1 to 9, or the control valve according to any one of claims 10 to 13.

15. A vehicle, characterized in that: The vehicle comprises: the valve core according to any one of claims 1 to 9, or the control valve according to any one of claims 10 to 13, or the thermal management system according to claim 14.

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