CN219841046U - Valve needle of electric valve, thermal management system and vehicle - Google Patents

Abstract

The present disclosure relates to a valve needle of an electric valve, a thermal management system, and a vehicle, wherein the valve needle is used for being matched with a valve port of the electric valve to block or open the valve port of the electric valve, the valve needle comprises a sealing contact part used for being abutted with an inner wall of the valve port, an outer wall of the sealing contact part is a first curved surface, any positions on the first curved surface all have the same curvature center and have the same curvature radius, and the curvature center is located on a central axis of the valve needle. Through the technical scheme, the valve needle rotates at a small angle under the action of external force (such as vibration or shaking of the electric valve), and any position on the outer wall of the sealing contact part has the same curvature center, so that even if the sealing contact part rotates at a small angle around the curvature center, the sealing contact part can be tightly contacted with the inner wall of the valve port to seal the valve port, the electric valve is kept in a sealing state without liquid leakage and the like, and the reliability of the electric valve is improved.

Description

Valve needle of electric valve, thermal management system and vehicle

Technical Field

The present disclosure relates to the field of valve structures, and in particular, to a valve needle for an electrically operated valve, a thermal management system, and a vehicle.

Background

The valve needle in the electric valve can be abutted against the inner wall of the valve port to block the valve port, when the valve needle deflects at a small angle, gaps are easily generated between the outer wall of the valve needle and the inner wall of the valve port, so that the electric valve is leaked, and the stability of the electric valve is affected.

Disclosure of Invention

The disclosure provides a valve needle of an electric valve, a thermal management system and a vehicle, so as to solve technical problems in related technologies.

To achieve the above object, a first aspect of the present disclosure provides a valve needle of an electric valve, the valve needle being configured to cooperate with a valve port of the electric valve to close or open the valve port of the electric valve, the valve needle including a sealing contact portion configured to abut against an inner wall of the valve port, an outer wall of the sealing contact portion being a first curved surface, any position on the first curved surface having the same center of curvature and the same radius of curvature, and the center of curvature being located on a central axis of the valve needle.

Optionally, the first curved surface is a first rotating surface, a rotating axis of the first rotating surface is a central axis of the valve needle, and a generatrix of the first rotating surface is an arc section.

Optionally, the central angle of the arc section is 15 ° -25 °.

Optionally, the valve needle further comprises an adjusting part, the outer wall of the adjusting part is a second curved surface, and the second curved surface is used for being matched with the valve port to adjust flow.

Optionally, the adjusting portion is connected to the sealing contact portion, and the adjusting portion is closer to an outer end surface of the valve port than the sealing contact portion.

Optionally, the adjusting part comprises a conical section and a cambered section, and the conical section is positioned between the sealing contact part and the cambered section;

the outer peripheral surface of the conical table section is a second rotating surface, the rotating axis of the second rotating surface is the central axis of the valve needle, and the generatrix of the second rotating surface is a straight line section;

the outer peripheral surface of the cambered surface section is a third rotating surface, the rotating axis of the third rotating surface is the central axis of the valve needle, and the generatrix of the third rotating surface is an arc section.

Optionally, the connection part of the first curved surface and the second curved surface is in transition connection through an arc.

Optionally, the valve needle further comprises a guide portion for contacting an inner wall of the valve body of the electric valve.

Optionally, an end surface of the guide portion away from the sealing contact portion is used for abutting against an elastic member, and the elastic member is used for providing an elastic force for abutting the valve needle against an inner wall of the valve port.

Optionally, the valve needle further comprises a tapered section located between the guide portion and the sealing contact portion, the tapered section having an outer diameter that gradually decreases in a direction from the guide portion toward the sealing contact portion.

Optionally, the connection part of the outer peripheral surface of the tapered section and the outer peripheral surface of the sealing contact part is in arc transition connection.

A second aspect of the present disclosure provides an electrically operated valve comprising a valve housing and a valve cartridge located within the valve housing, the valve cartridge comprising the valve needle described above, the valve housing having the valve port formed therein, the valve needle being for plugging or opening the valve port.

Optionally, the electric valve includes a fixing portion fixedly connected to the valve housing, and the fixing portion is formed with a screw hole extending in an axial direction of the electric valve, and the valve core includes:

the rotary screw rod is rotatably arranged in the threaded hole in a penetrating way, one end of the rotary screw rod is fixedly connected with the valve needle, and the rotary screw rod is arranged to be driven by the electric piece to rotate along the threaded hole and drive the valve needle to approach or be far away from the valve port;

and the first end of the elastic piece is connected with the rotating screw rod, and the other end of the elastic piece is connected with the valve needle so as to be used for providing sealing elastic force for pressing the valve needle on the inner wall of the valve port.

Optionally, a spacer is provided between the first end of the elastic member and the rotating screw, the spacer being made of a material having self-lubricating properties.

Alternatively, the gasket is made of polytetrafluoroethylene material, or the gasket is made of polyoxymethylene resin material.

A third aspect of the present disclosure provides a thermal management system comprising the electrically operated valve described above.

A fourth aspect of the present disclosure provides a vehicle comprising the thermal management system described above.

Through the technical scheme, the valve needle rotates at a small angle under the action of external force (such as vibration or shaking of the electric valve), and any position on the outer wall of the sealing contact part has the same curvature center, so that even if the sealing contact part rotates at a small angle around the curvature center, the sealing contact part can be tightly contacted with the inner wall of the valve port to seal the valve port, the electric valve is kept in a sealing state without liquid leakage and the like, and the reliability of the electric valve is improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of an electrically operated valve provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view taken along line "A-A" in FIG. 1;

FIG. 3 is an enlarged view of the portion "B" of FIG. 2;

FIG. 4 is an enlarged view of the "C" portion of FIG. 3;

FIG. 5 is a schematic perspective view of a valve needle and spring of a cartridge of an electrically operated valve provided by an exemplary embodiment of the present disclosure;

FIG. 6 is an exploded schematic view of a valve spool of an electrically operated valve provided by an exemplary embodiment of the present disclosure;

FIG. 7 is an exploded schematic view of a valve housing of an electrically operated valve provided by an exemplary embodiment of the present disclosure;

fig. 8 is a cross-sectional view of an electrically operated valve and an electrically operated member provided by an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a valve housing; 100-an electric valve; 11-spool chamber; 12-valve body; 121-a channel hole; 122-mounting ears; 123-external threads; 13-valve seat; 131-valve port; 1311-a first valve port segment; 132-first part; 1321-sealing grooves; 133-a second portion; 1331-flange portion; 134-a first sealing structure; 2-valve core; 21-a valve needle; 211-sealing the contact; 212-an adjusting part; 2121-frustum sections; 2122-cambered surface section; 213-a guide; 2131-vent gap; 214-a tapered section; 22-turning the screw; 23-an elastic member; 24-a gasket; 25-connecting pins; 3-a fixing part; 31-a threaded hole; 4-mounting seats; 41-a second sealing structure; 42-a first flow channel; 43-a second flow channel; 5-an iron core cover; 6-magnetic rotor; 7-electric parts.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, terms of orientation such as "inner and outer" are used to refer to the inner and outer of the contour of the associated component. In addition, it should be noted that terms such as "first", "second", etc. are used to distinguish one element from another element, and do not have order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

In the related art, the valve needle has a sealing portion for abutting against the valve port to block the valve port, and in a cross-sectional direction perpendicular to an axial direction of the valve port, a cross-section of the sealing portion is identical in shape to a cross-section of the valve port so that respective positions in a circumferential direction of the sealing portion can be brought into contact with an inner wall of the valve port to achieve sealing. The cross section of the valve port is usually circular, the sealing part in the related art is usually formed into a frustum-shaped tapered structure or a bowl-shaped tapered structure with a large upper part and a small lower part, and when the sealing part moves linearly along the axial direction of the valve port and is abutted against the inner wall of the valve port, each position in the circumferential direction of the sealing part can be contacted with the inner wall of the valve port to realize sealing. However, when the sealing portion is deflected at a small angle, in a cross-sectional direction perpendicular to the axial direction of the valve port, the cross section of the frustum-shaped tapered structure or the bowl-shaped tapered structure becomes elliptical, resulting in a difference between the shape of the cross section of the valve needle and the shape of the cross section of the valve port, so that a part of the sealing portion in the circumferential direction is deflected relative to the inner wall of the valve port and a gap is generated, resulting in leakage of the electric valve, and affecting the stability of the electric valve.

In view of this, the first aspect of the present disclosure provides a valve needle 21 of an electric valve 100, where the valve needle 21 is configured to cooperate with a valve port 131 of the electric valve 100 to block or open the valve port 131 of the electric valve 100, the valve needle 21 includes a sealing contact portion 211 configured to abut against an inner wall of the valve port 131, an outer wall of the sealing contact portion 211 is a first curved surface, any position on the first curved surface has the same curvature center O and the same curvature radius, and the curvature center O is located on a central axis of the valve needle 21.

For ease of understanding, the concept of center of curvature O is described herein: any point on the curve is correspondingly provided with a center point on the concave side of the curve, the distance between the center point and the point is the curvature radius of the point, so that the center point is used as the center of a circle, the curvature radius is used as the radius to form a circle, the circle is called as a curvature circle R of the curve at the point, and the center point is the curvature center O of the curve at the point. In other words, any point on the curve has a curvature circle R inscribed with the point, and the center of the curvature circle R is the curvature center O of the point. The location of the center of curvature O of a point on the curve can be determined by a progressive line equation.

In the valve needle 21 provided in the embodiment of the present disclosure, as shown in fig. 3 and 4, any position on the first curved surface has the same curvature center O and the same curvature radius, the curvature center O coincides with the central axis of the valve needle 21, that is, the curvature circle R corresponding to any position on the first curved surface has the same curvature center O and the same curvature radius, in other words, any position on the first curved surface is located on the spherical surface of the same sphere, and the spherical center of the sphere coincides with the central axis of the valve needle 21. When the above-mentioned sealing contact portion 211 rotates in a small range, the outer wall (i.e., the first curved surface) of the sealing contact portion 211 may rotate around the curvature center O thereof, and since any position on the first curved surface has the same curvature center O and the same curvature radius, the cross section of the first curved surface may still be kept circular in the cross section direction perpendicular to the central axis direction of the valve needle 21, i.e., the cross section of the sealing contact portion 211 may still match the shape of the cross section of the valve port 131, so that the outer wall of the sealing contact portion 211 may still be in close contact with the inner wall of the valve port 131 in the case of small-angle deflection of the valve needle 21. Therefore, the valve needle 21 provided in the embodiment of the present disclosure allows the valve needle 21 to rotate at a small angle under the action of an external force (for example, the electric valve 100 vibrates or shakes, etc.), and the valve needle 21 can ensure the close contact between the sealing contact portion 211 and the inner wall of the valve port 131, so as to achieve good sealing, thereby ensuring the sealing effect of the electric valve 100 in the blocking state, avoiding the leakage of the electric valve 100, and improving the reliability of the electric valve 100.

As an exemplary application scenario, the valve needle 21 may be applied to the electric valve 100 in the thermal management system of a vehicle, during the running process of the vehicle, the electric valve 100 vibrates and shakes along with the vehicle, the elastic member 23 is generally disposed in the electric valve 100 to apply an elastic force pressing the valve needle 21 against the valve port 131, then the elastic force of the elastic member 23 is generally parallel to the central axis direction of the valve needle 21, the valve needle 21 still rotates by a small angle, and the valve needle 21 provided in the embodiment of the disclosure can still ensure that the sealing contact portion 211 is in close contact with the inner wall of the valve port 131 under the condition of small angle deflection, so that the electric valve 100 still has good sealing performance during shaking, thereby ensuring the performance of the vehicle.

Through the above technical solution, the valve needle 21 rotates by a small angle under the action of external force (for example, the electric valve 100 vibrates or shakes, etc.), since any position on the outer wall of the sealing contact portion 211 has the same curvature center O, even if the sealing contact portion 211 rotates by a small angle around the curvature center O, the sealing contact portion 211 can still be in close contact with the inner wall of the valve port 131 to seal the valve port 131, so that the electric valve 100 is kept in a sealing state without leakage and other problems, and the reliability of the electric valve 100 is improved.

The specific shape and extent of the sealing contact portion 211 may be designed according to the requirements of the electric valve 100, for example, the size of the first curved surface in the central axis direction of the valve seat 13 may vary, and in some embodiments, the side of the sealing contact portion 211 close to the passage hole 121 on the valve body 12 of the electric valve 100 may have a larger size in the central axis direction, and in this embodiment, the positions on the first curved surface may still be on the spherical surface of the same sphere, and the positions on the sphere where the first curved surface is distributed may not be completely symmetrical.

The first curved surface may also be symmetrically disposed about the central axis of the valve needle 21, alternatively, the first curved surface may be a first rotating surface, the rotation axis of the first rotating surface is the central axis of the valve needle 21, and the generatrix of the first rotating surface is the arc segment L. That is, the first curved surface may be formed by rotating, so that the sealing contact portion 211 has good symmetry and a more stable structure.

In the above embodiment, as shown in fig. 4, alternatively, the central angle α of the circular arc segment L may be 15 ° -25 °. The valve needle 21 in this embodiment rotates around the curvature center O in an angle range of the central angle α, so that the sealing contact portion 211 and the valve port 131 can be still ensured to be in sealing contact, thereby meeting the sealing requirement of the electric valve 100 and improving the application range of the electric valve 100.

The above-mentioned electric valve 100 may be an on-off valve or a flow rate regulating valve, as an exemplary embodiment of the flow rate regulating valve, and optionally, the valve needle 21 may further include an adjusting portion 212, and an outer wall of the adjusting portion 212 is a second curved surface, where the second curved surface is used to cooperate with the valve port 131 to regulate the flow rate. In this embodiment, by planning the shape of the outer wall of the adjusting portion 212, the size of the gap between the valve needle 21 and the valve port 131 when the valve needle 21 is at different positions can be planned, so that the state in which the electric valve 100 is at different flow rates can be adjusted.

As shown in fig. 3 to 5, alternatively, the regulating portion 212 may be connected to the sealing contact portion 211, and the regulating portion 212 is closer to the outer end surface of the valve port 131 than the sealing contact portion 211. That is, when the needle 21 moves from a position away from the valve port 131 in a direction approaching the valve port 131, the regulating portion 212 enters the valve port first.

As shown in fig. 4 and 5, alternatively, the adjusting portion 212 may include a frustum section 2121 and a cambered surface section 2122, where the frustum section 2121 is located between the seal contact portion 211 and the cambered surface section 2122, and an outer peripheral surface of the frustum section is a second rotation surface, a rotation axis of the second rotation surface is a central axis of the valve needle 21, and a generatrix of the second rotation surface is a straight line section. The outer peripheral surface of the cambered surface section 2122 is a third rotating surface, the rotating axis of the third rotating surface is the central axis of the valve needle 21, and the generatrix of the third rotating surface is an arc segment.

In the above embodiment, the frustum section 2121 and the cambered surface section 2122 may be formed by rotary processing, and the bus of the second rotary surface is a straight line section, so that the gap between the frustum section 2121 and the valve port 131 is convenient to calculate and plan, and the frustum section 2121 and the cambered surface section 2122 are respectively involved, so that the electric valve 100 can be adaptively planned to be in different flow states, and the electric valve 100 has a good flow regulation effect. As shown in fig. 5, optionally, the connection between the first curved surface and the second curved surface is connected through an arc transition, so that the valve needle 21 has good stability.

In order to ensure that the movement of the needle 21 is movable along the axis of the electric valve 100, as shown in fig. 3, the needle 21 may optionally further comprise a guide 213, the guide 213 being adapted to contact an inner wall of the valve body 12 of the electric valve 100. In the process that the valve needle 21 is close to or far away from the valve port 131, the guide part 213 is in contact with the inner wall of the valve body 12 of the electric valve 100, so that the valve needle 21 can linearly move along the valve body 12, deflection of the valve needle 21 is avoided or reduced, and good sealing or flow regulating performance of the valve needle 21 is ensured. In the above embodiment, as shown in fig. 5, the air discharge gap 2131 may be formed on the guide portion 213, so that air or liquid on both sides of the guide portion 213 can flow through each other, avoiding the excessive pressure difference from obstructing the movement of the needle 21.

As shown in fig. 2 and 5, alternatively, an end surface of the guide portion 213 remote from the seal contact portion 211 is used to abut against the elastic member 23, and the elastic member 23 is used to provide an elastic force to urge the needle 21 against the inner wall of the valve port 131. Since the elastic member 23 can provide an elastic force for pressing the valve needle 21 against the inner wall of the valve port 131, when the valve needle 21 vibrates, for example, when the electric valve 100 is applied to a vehicle, the electric valve 100 vibrates along with the vehicle, and the elastic member 23 provides an elastic force for pressing the valve needle 21 against the inner wall of the valve port 131, thereby avoiding the condition that the valve needle 21 vibrates and is far away from the valve port 131 to cause leakage of the electric valve 100, and the like, and ensuring the reliability of the electric valve 100.

In an embodiment comprising the above-mentioned guiding portion 213, the valve needle 21 optionally further comprises a tapered section 214, the tapered section 214 being located between the guiding portion 213 and the sealing contact portion 211, the outer diameter of the tapered section gradually decreasing in a direction from the guiding portion 213 towards the sealing contact portion 211. Optionally, the connection between the outer peripheral surface of the tapered section and the outer peripheral surface of the sealing contact portion is in transition connection through an arc.

As shown in fig. 1 to 8, the second aspect of the present disclosure provides an electric valve 100, the electric valve 100 further comprising a valve housing 1 and a valve spool 2 located inside the valve housing 1, the valve spool 2 comprising the valve needle 21 described above, the valve housing 1 having a valve port 131 formed thereon, the valve needle 21 for blocking or opening the valve port 131.

The above-mentioned electric valve 100 still has good leakproofness when rocking, even the valve needle 21 takes place small-angle rotation under external force (for example electric valve 100 takes place to vibrate or rock etc.), because the arbitrary position on the outer wall of seal contact portion 211 all has the same center of curvature O, seal contact portion 211 takes place small-angle rotation around center of curvature O, seal contact portion 211 still can with the inner wall of valve port 131 in close contact with in order to shutoff valve port 131 for electric valve 100 keeps in the shutoff state and can not take place weeping scheduling problem, has improved electric valve 100's reliability. The electric valve 100 can be applied to a vehicle, and the electric valve 100 can still be kept in a blocking state when the electric valve 100 shakes along with the vehicle, and has good reliability and stability, so that the vehicle has stability.

The above-mentioned electric valve 100 may be any type of electric valve 100 such as a motor-driven valve, a solenoid valve, or a hydraulic-driven valve, for example, the electric valve 100 may be a solenoid valve, and as an exemplary embodiment, alternatively, the electric valve 100 may include a fixing portion 3, the fixing portion 3 is fixedly connected to the valve housing 1, and a threaded hole 31 extending in an axial direction is formed in the fixing portion 3, the valve core 2 includes a rotating screw 22 and an elastic member 23, the rotating screw 22 is rotatably inserted into the threaded hole 31, one end of the rotating screw 22 is fixedly connected to the valve needle 21, the rotating screw 22 is configured to be capable of rotating along the threaded hole 31 and driving the valve needle 21 to approach or separate from the valve port 131 under the driving of the electric member 7, and a first end of the elastic member 23 is connected to the rotating screw 22, and the other end is connected to the valve needle 21 for providing a sealing elastic force for pressing the valve needle 21 against an inner wall of the valve port 131. Alternatively, the rotary screw 22 and the needle 21 may be fixedly connected by a connecting pin 25.

In the above embodiment, as shown in fig. 2, the first end of the elastic member 23 is connected to the rotary screw 22, and the other end is connected to the valve needle 21, and the elastic member 23 can provide a sealing elastic force for pressing the valve needle 21 against the inner wall of the valve port 131, when the valve needle 21 vibrates, for example, when the electric valve 100 is applied to a vehicle, the electric valve 100 vibrates along with the vehicle, and the elastic member 23 provides a sealing elastic force for pressing the valve needle 21 against the inner wall of the valve port 131, so as to avoid the situation that the valve needle 21 vibrates and is far away from the valve port 131, and thus the electric valve 100 leaks, and the reliability of the electric valve 100 is ensured.

It should be noted that, the specific structure and transmission principle of the electric component 7 described above can be implemented by those skilled in the art with reference to the related art. As an exemplary embodiment, as shown in fig. 2, alternatively, the electric component 7 may be a coil assembly, where the rotating screw 22 is connected to the magnetic rotor 6, and the coil assembly drives the magnetic rotor 6 to rotate, and the magnetic rotor 6 rotates and drives the rotating screw 22 to rotate in the threaded hole 31, so as to drive the valve needle 21 to approach or separate from the valve port 131. Alternatively, the outside of the magnetic rotor 6 may be covered with a core cover 5 to protect the magnetic rotor 6.

As shown in fig. 2 and 6, a spacer 24 is optionally provided between the first end of the elastic member 23 and the rotation screw 22, the spacer 24 being made of a material having self-lubricating properties. The material having self-lubricating property may be a material having a material structure itself doped with a lubricant, a material having lubricating property itself, a porous material containing grease, or the like, for example, a solid self-lubricating material in which rare earth fluoride is a metal material, a novel ceramic material having self-lubricating property, an organically synthesized high polymer self-lubricating material, or the like. Alternatively, the gasket 24 may be made of polytetrafluoroethylene material. Alternatively, the gasket 24 may be made of a polyoxymethylene resin material.

In the above embodiment, since the spacer 24 is made of a material having self-lubricating properties, the coefficient of friction between the spacer 24 and the elastic member 23 and the coefficient of friction between the spacer 24 and the rotary screw 22 are both low, and the friction force applied to the rotary screw 22 during rotation can be reduced, thereby reducing the driving voltage required for the rotary screw 22, achieving the effects of reducing the driving energy consumption of the electric valve 100 and improving the sensitivity of the electric valve 100.

In the above-described electric valve, alternatively, the valve housing 1 is hollow in the interior and formed with the spool chamber 11, the valve housing 1 includes the valve body 12 and the valve seat 13 provided in the axial direction of the electric valve 100, the valve body 12 is formed with the passage hole 121 communicating with the spool chamber 11, the valve seat 13 is formed with the valve port 131 communicating with the spool chamber 11, the valve seat 13 includes the first portion 132, and the first portion 132 is located outside the valve body 12.

As shown in fig. 1 and 2, the valve housing 1 is applied to an electric valve 100, a spool chamber 11 of the valve housing 1 may be used for mounting a spool 2, the spool 2 and the valve housing 1 together form the electric valve 100, and the spool 2 may be used for blocking a valve port 131 on a valve seat 13. The above-described electric valve 100 may be a motor-driven valve, a solenoid valve, a hydraulically-driven valve, or the like, and the type and function of the electric valve 100 to which the valve housing 1 is applied are not limited in the present disclosure.

The valve housing 1 includes a valve body 12 and a valve seat 13, the valve body 12 and the valve seat 13 being provided separately so that the spool 2 of the electric valve 100 can be installed in the spool chamber 11 of the valve housing 1. As shown in fig. 2 and 3, the valve seat 13 provided in the embodiment of the present disclosure includes a first portion 132 located outside the valve body 12, during the installation of the valve housing 1, the first portion 132 of the valve seat 13 may be always located outside the valve body 12, the valve body 12 and the valve seat 13 are disposed along the axial direction, and the first portion 132 of the valve body 12 and the valve seat 13 may be fixed to achieve positioning of the valve body 12 and the valve seat 13 during the installation, which is simple and reliable. Compared with the technical scheme that the valve seat is located inside the valve body in the related art, the first portion 132 of the valve seat 13 in the embodiment of the disclosure is always located outside the valve body 12, so that the positioning and installation of the positional relationship between the valve body 12 and the valve seat 13 are facilitated, and the connection between the valve body 12 and the valve seat 13 can be realized in various manners such as bonding, welding, and the like, therefore, the connection and fixation manner between the valve body 12 and the valve seat 13 is simpler, and the processing and production of the electric valve 100 are facilitated.

The valve seat 13 is provided with the channel hole 121, the valve seat 13 is provided with the valve port 131, as shown in fig. 3, when the valve port 131 on the valve seat 13 is in a blocking state, the distance between the flow channel where the channel hole 121 is located and the flow channel where the valve port 131 is located is further, the first part 132 of the valve seat 13 is located outside the valve body 12, and the valve seat 13 and the valve body 12 can be sealed by various modes (such as sealant, sealing paint or sealing ring, etc.), so that the sealing difficulty is low, the sealing performance is good, the problems of liquid leakage and the like of the valve housing 1 can be effectively avoided, and the reliability of the electric valve 100 is improved.

Through the above technical scheme, the valve seat 13 of the valve housing 1 comprises the first part 132 always located outside the valve body 12, and the valve body 12 and the first part 132 of the valve seat 13 can be fixed to position the valve body 12 and the valve seat 13 in the installation process, so that the valve body 12 and the valve seat 13 can be connected in a simpler processing mode, and the production of the electric valve 100 is facilitated. In addition, the difficulty in sealing between the valve seat 13 and the valve body 12 is reduced, so that the problems such as leakage of the valve housing 1 can be effectively avoided, and the reliability of the electric valve 100 can be improved.

The valve seat 13 may be located entirely outside the valve body 12, i.e. the valve seat 13 is entirely of the first portion 132, or the valve seat 13 may further comprise a second portion 133 located within the valve body 12. As shown in fig. 2 and 7, alternatively, the valve seat 13 may include a second portion 133, where the second portion 133 is configured as a flange portion 1331, and the flange portion 1331 extends from the first portion 132 toward the interior of the valve body 12, and the flange portion 1331 in this embodiment extends toward the interior of the valve body 12, so as to perform a positioning function, that is, the flange portion 1331 extends into the interior of the valve body 12 and cooperates with the inner wall of the valve body 12, so that an operator can easily perform coaxial positioning on the valve body 12 and the valve seat 13, thereby further simplifying the difficulty of installation positioning, and realizing quick installation of the electric valve 100.

In the above embodiment of the flange portion 1331, alternatively, the outer surface of the flange portion 1331 may be in interference fit with the inner surface of the valve body 12, and the contact manner of the interference fit can reduce the gap between the outer surface of the flange portion 1331 and the inner surface of the valve body 12, and by controlling the interference, the sealing connection between the outer surface of the flange portion 1331 and the inner surface of the valve body 12 can be achieved, thereby improving the reliability of the electric valve 100.

As shown in fig. 3 and 4, alternatively, the valve port 131 extends from an inner end surface of the flange portion 1331 to an outer end surface of the first portion 132, and the valve port 131 includes a first valve port segment 1311, the first valve port segment 1311 being formed into a tapered hole of gradually decreasing inner diameter in a direction extending from the inner end surface of the flange portion 1331 toward the outer end surface of the first portion 132, an inner wall of the tapered hole being for abutment with the sealing contact portion 211 of the valve spool 2. Since the first port segment 1311 is formed as a tapered bore with a tapered inner diameter, the tapered bore facilitates the flow of liquid outwardly from the spool chamber 11 through the port 131, and the tapered bore is capable of cooperating with the valve needle 21 to effect sealing or flow regulation of the port 131.

In the above-described embodiment, the valve port 131 may optionally further include a second valve port section formed as a tapered hole with a gradually decreasing inner diameter in a direction extending from the outer end surface of the first portion 132 toward the inner end surface of the flange portion 1331.

As shown in fig. 3, the surface of the first portion 132 facing the valve body 12 may alternatively be sealingly connected to the valve body 12. The surface of the first portion 132 facing the valve body 12 may be sealingly coupled to the valve body 12 by a variety of processes, such as welding or bonding. As an exemplary embodiment, the surface of the first portion 132 facing the valve body 12 may optionally be connected to the valve body 12 by a welding process.

The electric valve 100 further generally includes a mounting seat 4, at least a first flow channel 42 and a second flow channel 43 are formed in the mounting seat 4, the valve housing 1 of the electric valve 100 is mounted in the mounting seat 4, the channel hole 121 may be in communication with the first flow channel 42, the valve port 131 may be in communication with the second flow channel 43, and the valve needle 21 may be used to close or open the valve port 131, thereby blocking or conducting the first flow channel 42 and the second flow channel 43. As an exemplary embodiment, as shown in fig. 8, alternatively, the first portion 132 may be used to be mounted to the mount 4 of the electric valve 100, and the outer circumferential surface of the first portion 132 is provided with a first sealing structure 134, and the first sealing structure 134 is used to seal a gap between the first portion 132 and the mount 4 of the electric valve 100, so as to avoid a mixed flow of liquid through the gap between the first portion 132 and the mount 4 of the electric valve 100. As shown in fig. 8, when the valve housing 1 in this embodiment is mounted to the mount 4 having the first flow passage 42 and the second flow passage 43, the first seal structure 134 is used to seal the gap between the first portion 132 and the mount 4 of the electric valve 100, so that the mixed flow of the liquid in the first flow passage 42 and the second flow passage 43 can be avoided, the sealing property between the first flow passage 42 and the second flow passage 43 can be improved, and the reliability of the electric valve 100 can be improved.

In the above embodiment, alternatively, the first sealing structure 134 may be a first sealing ring, and the outer peripheral surface of the first portion 132 is formed with the sealing groove 1321, and the first sealing ring is mounted in the sealing groove 1321 and at least partially protrudes from the outer peripheral surface of the first portion 132, so that the first sealing ring can be tightly clamped between the sealing groove 1321 and the mounting seat 4 of the electric valve 100, thereby achieving a good sealing effect.

In order to fix the valve housing 1 and the mount 4, the valve housing 1 is attached to the mount 4 of the electric valve 100, as shown in fig. 7 and 8, alternatively, the outer peripheral surface of the valve body 12 may be formed with external threads 123, and the electric valve 100 may be provided so as to be fixed in a threaded mounting hole on the mount 4 of the electric valve 100 by the external threads 123.

In order to achieve a limit and a position of the valve housing 1 and the mounting seat 4, the outer surface of the valve body 12 may optionally be formed with outwardly protruding mounting lugs 122, the surface of the mounting lugs 122 facing the valve seat 13 for abutment against the outer wall of the mounting seat 4 of the electric valve 100. In this embodiment, optionally, as shown in fig. 2 and 8, a second sealing structure 41 may be further provided between the mounting ear 122 and the outer wall of the mounting seat 4 to achieve a seal between the interior of the mounting seat 4 and the outside.

A third aspect of the present disclosure provides a thermal management system comprising the electrically operated valve 100 described above. The thermal management system may be a device cooling system, an air conditioning system, a battery cooling or heating system of a vehicle, etc., and the present disclosure is not particularly limited in type and application scenario of the thermal management system. The above-mentioned electric valve 100 is applied to a thermal management system, and the electric valve 100 may be used to regulate the flow of a refrigerant or a cooling liquid, to shut off the flow, or to regulate the flow of a liquid in a flow passage, etc., and the present disclosure is not limited to the specific location and function of the electric valve 100 disposed in the thermal management system.

A fourth aspect of the present disclosure provides a vehicle comprising the thermal management system described above. The vehicle herein may be a fuel-fired vehicle, an electric vehicle, a hybrid vehicle, or the like, and the present disclosure is not limited to a specific type of vehicle. The thermal management system is an air conditioning thermal management system, a battery thermal management system or a motor electric control thermal management system of a vehicle, and the application position and the function of the thermal management system in the vehicle are not limited in the disclosure.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (17)

1. The valve needle of the electric valve is characterized by being used for being matched with a valve port of the electric valve to plug or open the valve port of the electric valve, the valve needle comprises a sealing contact part which is used for being abutted against the inner wall of the valve port, the outer wall of the sealing contact part is a first curved surface, any position on the first curved surface has the same curvature center and the same curvature radius, and the curvature center is located on the central axis of the valve needle.

2. The valve needle of an electrically operated valve of claim 1, wherein the first curved surface is a first surface of revolution, the axis of rotation of the first surface of revolution is the central axis of the valve needle, and the generatrix of the first surface of revolution is a circular arc segment.

3. A needle for an electrically operated valve as claimed in claim 2, wherein the radius of the circular arc segment is 15 ° -25 °.

4. The valve needle of an electrically operated valve as set forth in claim 1 further comprising an adjustment portion, an outer wall of said adjustment portion being a second curved surface for mating with said valve port to adjust flow.

5. The valve needle of an electrically operated valve as set forth in claim 4, wherein said adjustment portion is connected to said sealing contact portion and is closer to an outer end surface of said valve port than said sealing contact portion.

6. The valve needle of an electric valve of claim 4, wherein the adjustment portion comprises a land section and a cambered section, the land section being located between the sealing contact portion and the cambered section;

the outer peripheral surface of the conical table section is a second rotating surface, the rotating axis of the second rotating surface is the central axis of the valve needle, and the generatrix of the second rotating surface is a straight line section;

the outer peripheral surface of the cambered surface section is a third rotating surface, the rotating axis of the third rotating surface is the central axis of the valve needle, and the generatrix of the third rotating surface is an arc section.

7. A valve needle of an electric valve according to any of the claims 4-6, characterized in that the connection of the first curved surface and the second curved surface is connected by an arc transition.

8. A valve needle of an electric valve according to any one of claims 1-6, characterized in that the valve needle further comprises a guide for contacting an inner wall of a valve body of the electric valve.

9. The valve needle of an electrically operated valve as set forth in claim 8, wherein an end surface of said guide portion remote from said sealing contact portion is adapted to abut against an elastic member for providing an elastic force urging said valve needle against an inner wall of said valve port.

10. The valve needle of an electrically operated valve according to claim 8, further comprising a tapered section between the guide and the sealing contact, the tapered section having an outer diameter that tapers in a direction from the guide toward the sealing contact.

11. The valve needle of an electric valve according to claim 10, characterized in that the junction of the outer peripheral surface of the tapered section and the outer peripheral surface of the sealing contact is connected by an arc transition.

12. An electrically operated valve comprising a valve housing and a valve cartridge within the valve housing, the valve cartridge comprising a valve needle as claimed in any one of claims 1 to 11, the valve housing having the valve port formed therein, the valve needle being adapted to close or open the valve port.

13. The electrically operated valve according to claim 12, wherein the electrically operated valve includes a fixing portion fixedly connected to the valve housing, and the fixing portion has a screw hole formed thereon extending in an axial direction of the electrically operated valve, the valve body including:

the rotary screw rod is rotatably arranged in the threaded hole in a penetrating way, one end of the rotary screw rod is fixedly connected with the valve needle, and the rotary screw rod is arranged to be driven by the electric piece to rotate along the threaded hole and drive the valve needle to approach or be far away from the valve port;

and the first end of the elastic piece is connected with the rotating screw rod, and the other end of the elastic piece is connected with the valve needle so as to be used for providing sealing elastic force for pressing the valve needle on the inner wall of the valve port.

14. The electrically operated valve of claim 13, wherein a spacer is disposed between the first end of the elastic member and the rotating screw, the spacer being made of a material having self-lubricating properties.

15. The electrically operated valve of claim 14, wherein the gasket is made of polytetrafluoroethylene material or the gasket is made of polyoxymethylene resin material.

16. A thermal management system comprising the electrically operated valve of any one of claims 12-15.

17. A vehicle comprising the thermal management system of claim 16.