CN219176970U - Flow regulating valve and valve needle and vehicle thereof - Google Patents

Abstract

The utility model relates to a flow control valve and needle, vehicle thereof, this needle be used for with the valve port cooperation of flow control valve to flow control valve is adjusted, and the needle includes continuous sealed section and adjustment section, and the adjustment section is connected in the sealed section one side of keeping away from the screw rod, and the outer wall of sealed section includes first curved surface, and first curved surface is used for the inner wall contact with the valve port, with sealed valve port, and first curved surface is the rotating surface, and the axis of rotation of first curved surface is the central line of needle, the generating line of first curved surface is the curve, and the outer wall of adjustment section is including being the second curved surface, the second curved surface is used for the inner wall cooperation with the valve port in order to adjust the flow. Therefore, the flow regulating valve is beneficial to improving the flow regulating effect in the initial stage of opening the flow regulating valve. In addition, through the curved surface shape of the adjusting section of the valve needle and the shape of the inner wall of the valve port of the valve needle are reasonably designed, the flow is accurately adjusted, cavitation of the flow adjusting valve is reduced, fluid flows more stably, and noise is reduced.

Description

Flow regulating valve and valve needle and vehicle thereof

Technical Field

The disclosure relates to the technical field of flow regulating components, in particular to a flow regulating valve, a valve needle of the flow regulating valve and a vehicle.

Background

In a vehicle, a flow regulating valve (such as an electronic expansion valve) can be applied to a thermal management system of the vehicle, the flow regulating valve is provided with a valve port and a valve needle matched with the valve port, and the flow area of the valve port can be regulated by enabling the valve needle to be close to or far from the valve port, so that the regulation of the flow of the refrigerant is realized.

However, in the existing flow rate regulating valve, the flow rate change is not obvious at the initial stage of opening (such as the low pulse stage of the electronic expansion valve) and the flow rate regulating effect is not obvious due to the existing structural design.

Disclosure of Invention

The purpose of this disclosure is to provide a flow control valve and needle, vehicle thereof, and with this needle, be favorable to promoting the regulation effect to the flow at the initial stage that flow control valve opened.

In order to achieve the above object, the present disclosure provides a valve needle of a flow regulating valve for cooperating with a valve port of the flow regulating valve to regulate a flow of the flow regulating valve, the valve needle comprising a sealing section and a regulating section connected to each other, the regulating section being connected to a side of the sealing section remote from a screw;

the outer wall of the sealing section comprises a first curved surface, the first curved surface is used for being in contact with the inner wall of the valve port to seal the valve port, the first curved surface is a rotating surface, the rotating axis of the first curved surface is the central line of the valve needle, and the generatrix of the first curved surface is a curve;

the outer wall of the adjusting section comprises a second curved surface, and the second curved surface is used for being matched with the inner wall of the valve port so as to adjust flow.

Optionally, the second curved surface is a rotating surface, the rotating axis of the second curved surface is the central line of the valve needle, and the generatrix of the second curved surface comprises a first arc segment, and the first arc segment protrudes towards a direction away from the central line of the valve needle;

the distance between one end of the first arc section away from the first curved surface and the central line of the valve needle is greater than the distance between the other end of the first arc section close to the first curved surface and the central line of the valve needle.

Optionally, the curvature radius of the first arc segment is 0.1-0.7 mm.

Optionally, the generating line of the second curved surface still includes the second arc section, the second arc section is towards keeping away from the direction of the central line of needle protrusion, the one end and the first arc section of second arc section keep away from the one end of first curved surface link to each other, the other end of second arc section extends to the central line position of needle.

Optionally, the length of the adjusting section in the axial direction of the valve needle is 0.45-4.65 mm.

Optionally, the generating line of the first curved surface comprises a third arc segment, the third arc segment protrudes towards a direction away from the central line of the valve needle, and one end of the third arc segment is connected with one end of the first arc segment;

optionally, a distance between one end of the third arc line far away from the first arc line segment and the central line of the valve needle is greater than a distance between the other end of the third arc line segment close to the first arc line segment and the central line of the valve needle.

Optionally, the curvature radius of the third arc segment is 0.5-2.1 mm.

Optionally, the length of the third arc segment is 1.3-3.5 mm.

Optionally, the ratio of the length of the adjusting section to the sealing section is 0.3-3.8.

Optionally, the intersection position of the first curved surface and the second curved surface has no straight section.

Optionally, the first curved surface is an arc surface, the second curved surface is an arc surface, and the first curved surface is not tangent to the second curved surface.

According to another aspect of the present disclosure there is provided a flow regulating valve comprising the valve needle described above.

According to yet another aspect of the present disclosure, there is provided a vehicle including the above-described flow regulating valve.

In the valve needle provided by the disclosure, since the adjusting section is a curved surface and has no straight section, when the adjusting section is matched with the inner wall of the valve port, for example, when the adjusting section is matched with the inner wall of the first valve port section, the flow is changed at the moment of opening the valve needle, the flow is adjusted more quickly, so that the flow adjustment requirement is met, and the response speed of the flow adjusting valve is improved. In other words, when the valve needle moves in the initial stage of opening the flow valve (such as the low pulse stage of the expansion valve), the flow change of the fluid is relatively obvious, so that a section with a constant flow value does not exist in the flow curve, the flow adjustment can be performed by fully utilizing the low pulse region, the adjustment range of the electronic expansion valve is enlarged, and the effect of rapidly controlling the flow is achieved.

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 a valve needle provided in one embodiment of the present disclosure;

FIG. 2 is a schematic longitudinal cross-sectional view of a valve needle provided by an embodiment of the present disclosure;

FIG. 3 is a schematic longitudinal cross-sectional view of a valve seat in a mated condition with a valve needle provided by an embodiment of the present disclosure, wherein the valve port is in a condition closed by the valve needle;

FIG. 4 is a schematic longitudinal cross-sectional view of a valve seat in engagement with a valve needle provided by another embodiment of the present disclosure, wherein the valve port is in a closed state by the valve needle;

FIG. 5 is a schematic longitudinal cross-sectional view of a flow control valve provided by an embodiment of the present disclosure;

FIG. 6 is a schematic longitudinal cross-sectional view of a flow control valve provided by another embodiment of the present disclosure, wherein the flow control valve is in an exploded state;

FIG. 7 is a schematic perspective view of a valve seat provided in one embodiment of the present disclosure;

FIG. 8 is a schematic longitudinal cross-sectional view of a valve seat provided by an embodiment of the present disclosure;

FIG. 9 is a schematic perspective view of a valve seat provided in another embodiment of the present disclosure;

FIG. 10 is a schematic front view of a valve seat provided by another embodiment of the present disclosure;

FIG. 11 is a schematic longitudinal cross-sectional view of a valve seat provided in another embodiment of the present disclosure.

Description of the reference numerals

1000-a flow regulating valve; 100-valve seat; 10-valve port; 11-a first valve port section; 111-the inner wall of the conical hole; 12-a second valve port segment; 121-arc segment; 13—the centerline of the valve port; 200-valve needle; 210-a seal section; 2101—a first curved surface; 211-a third arc segment; 220-adjusting the segments; 2201-a second curved surface; 221-a first arc segment; 222-a second arc segment; 230—the centerline of the valve needle; 310-core cover; 320-magnetic rotor; 330-locking block; 340-screw; 350-limiting springs; 400-valve core; 510-valve needle cylinder cover; 520-a valve needle spring; 600-valve body; 610-spool chamber; 620-a first opening; 630-a second opening; 710—a first sealing ring; 720-second sealing ring.

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.

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 the present disclosure, unless otherwise indicated, terms such as "upper, lower, left, and right" are used generally to refer to directions defined in the drawings, and "inner and outer" refer to the inside and outside of related parts, and further terms such as "first", "second", and the like are used for distinguishing one element from another without having any order or importance.

As mentioned above, with the prior art flow regulating valve, for example an electronic expansion valve, the effect of the flow regulation is not evident in the initial phase of the valve needle opening, i.e. in the low pulse phase. It is found that the main reason that the electronic expansion valve in the prior art cannot effectively regulate the flow rate of the electronic expansion valve in the low pulse stage is that the part of the inner wall of the valve port corresponding to the valve needle has a straight section, so that the gap between the valve needle and the corresponding part of the valve port is not changed greatly when the valve needle is in the low pulse stage or the movement amount of the valve needle is small, and the flow rate cannot be regulated accurately in the stage.

In view of this, the present disclosure provides a valve needle 200 and a flow regulating valve 1000 comprising the valve needle 200, the flow regulating valve 1000 including but not limited to an electronic expansion valve, as shown in fig. 1-11.

The valve needle 200 is adapted to cooperate with the valve port 10 of the flow regulating valve 1000 to regulate the flow of the flow regulating valve 1000. The flow regulating valve 1000 may further include a valve seat 100, where the valve seat 100 is provided with the valve port 10, and the valve port 10 may include a first valve port segment 11 and a second valve port segment 12 connected to each other, where the first valve port segment 11 is closer to the spool chamber 610 of the regulating valve than the second valve port segment 12, that is, the second valve port segment 12 is located outside the first valve port segment 11.

The valve needle 200 provided by the present disclosure includes a sealing section 210 and an adjusting section 220 that are connected, the adjusting section 220 is connected to one side of the sealing section 210 far away from the screw, the outer wall of the sealing section 210 includes a first curved surface 2101, the first curved surface 2101 is used for contacting with the inner wall of the valve port 10, for example, contacting with the inner wall of the first valve port section 11, so as to seal the valve port 10, the first curved surface 2101 is a rotating surface, the rotating axis of the first curved surface 2101 is a central line 230 of the valve needle, and a bus of the first curved surface 2101 is a curve. The outer wall of the regulator segment 220 includes a second curved surface 2201, and the second curved surface 2201 is configured to cooperate with the valve port 10 to regulate the flow. For example, the second curved surface 2201 is configured to cooperate with an inner wall of the second port segment 12 of the valve port 10 to define a flow path for the valve port 10. Thus, when the adjustment segment 220 moves within the second valve port segment 12, the flow area of the second valve port segment 12 may be adjusted, thereby allowing for flow adjustment.

In the present disclosure, the first curved surface 2101 is a rotating surface as a whole, which is convenient for processing and can simplify the structure. The outer wall of the sealing section 210 of the valve needle 200 contacts with the inner wall of the valve port 10, for example, is matched with the cambered surface of the inner wall of the first valve port section 11 of the valve port 10, so that the valve port (such as the first valve port section 11) is better sealed, the problem of leakage caused by the fact that the valve needle 200 is not tightly sealed with the valve port 10 is solved, and at the moment, the valve port 10 on the valve seat 100 is closed. When it is desired to open the port 10, the valve needle 200 may be moved toward the spool chamber 610 on the valve body 600 to separate the valve needle 200 from the inner wall of the port 10 (first port segment 11). Meanwhile, in the moving process of the valve needle 200, the flow rate is adjusted by changing the gap between the outer wall of the adjusting section 220 of the valve needle 200 and the inner wall of the valve port 10 (such as the second valve port 11), namely, changing the flow area of the through flow channel, thereby changing the flow area of the valve port 10.

In the valve needle 200 provided in the present disclosure, since the adjusting section 220 is curved and has no straight section, when the adjusting section 220 is matched with the inner wall of the valve port 10, for example, the inner wall of the first valve port section 11, the flow rate is changed at the moment of opening the valve needle 200, so that the flow rate is adjusted more quickly, the flow rate adjustment requirement is met, and the response speed of the flow rate adjusting valve 1000 is improved. In other words, when the valve needle 200 moves in the initial stage of opening the flow valve (such as the low pulse stage of the expansion valve), the flow change of the fluid is relatively obvious, so that a section with a constant flow value does not exist in the flow curve, the low pulse region can be fully utilized for flow adjustment, the adjustment range of the electronic expansion valve is expanded, and the effect of rapidly controlling the flow is achieved.

In addition, by reasonably designing the curved shape of the adjusting section 220 of the valve needle 200 and the shape of the inner wall of the valve port 10 (such as the second valve port section 12), under the cooperation of the adjusting section 220 and the second valve port section 12, the flow can be accurately adjusted, cavitation of the flow adjusting valve 1000 can be reduced, fluid can flow more stably, and noise can be reduced.

The specific shape of the second curved surface 2201 is not limited by the present disclosure, and may be designed according to factors such as the shape of the inner wall of the second valve port segment 12. Optionally, in one embodiment of the present disclosure, as shown in fig. 1 and 2, the second curved surface 2201 is a rotating surface, the rotation axis of the second curved surface 2201 is the center line 230 of the valve needle, and the generatrix of the second curved surface 2201 includes the first arc segment 221, that is, during the movement of the valve needle 200 along the center line 13 of the valve port, the adjustment of the flow area is achieved by changing the gap between the first arc segment 221 and the inner wall of the valve port. The first arc segment 221 may be used to define a flow passage with the inner wall of the second valve port segment 12, and in the process that the valve needle 200 moves along the center line 13 of the valve port, the clearance between the first arc segment 221 and the inner wall of the valve port of the second valve port segment 12 is changed, so as to realize adjustment of the flow area, thereby realizing adjustment of the flow rate. The first arc segment 221 protrudes in a direction away from the center line 230 of the valve needle, wherein a distance from one end of the first arc segment 221 away from the first curved surface 2101 to the center line 230 of the valve needle is greater than a distance from the other end of the first arc segment 221 close to the first curved surface 2101 to the center line 230 of the valve needle, that is, referring to fig. 2, an area of a cross section of an upper end of the adjusting segment 220 is greater than an area of a cross section of a lower end in a drawing direction of fig. 2. In this embodiment, the second curved surface 2201 is a rotating surface as a whole, which is convenient for processing and can simplify the structure.

In addition, the arrangement of the first arc segment 221 does not cause abrupt change of the flow area, so that the fluid can flow more stably. During adjustment, the flow curve can rise according to a certain slope, and the flow curve requirement of the expansion valve can be better met.

It is understood that the generatrix of the second curved surface 2201 may be configured in any suitable structure other than the first arc segment 221, for example, the generatrix of the second curved surface 2201 may be a spline curve formed by connecting a plurality of arc segments with different curvatures, which is not limited in this disclosure.

The radius of curvature of the first arc segment 221 is not limited in this disclosure, and as an alternative embodiment, the radius of curvature of the first arc segment 221 may be 0.1 to 0.7mm. In this range, it is advantageous to ensure the flow rate adjustment response speed and the accuracy of the flow rate adjustment valve 1000 in the initial stage of opening, and the flow rate adjustment effect can be improved.

As shown in fig. 2, the generatrix of the second curved surface 2201 may further include a second arc segment 222, where the second arc segment 222 protrudes in a direction away from the center line 230 of the valve needle, and one end of the second arc segment 222 is connected to one end of the first arc segment 221 away from the first curved surface 2101, and the other end of the second arc segment 222 extends to the position of the center line 230 of the valve needle. The second arcuate segment 222 is configured to rotate such that the end of the conditioning segment 220 remote from the seal segment 210 forms an arcuate end.

It should be noted that, the length of the adjusting section 220 of the valve needle 200 in the axial direction of the valve needle 200 is not limited in the present disclosure, alternatively, the length of the adjusting section 220 may be smaller than the length of the second valve port section 12, or may be larger than the length of the second valve port section 12, specifically, the length of the adjusting section 220 may be 0.45-4.65 mm, and further, the length of the adjusting section 220 may be 0.45-2.8 mm, so as to adapt to valve ports 10 with different sizes.

In the embodiment shown in fig. 2 in which the generatrix of the adjustment section 220 comprises a first arc segment 221 and a second arc segment 222, the sum of the length of the first arc segment 221 and the length of the second arc segment 222 in the axial direction of the valve needle 200 may be 0.45-4.65 mm, and further may be 0.45-2.8 mm.

The shape of the generatrix of the first curved surface 2101 may be any suitable shape, which is not limited by the present disclosure. For example, the generatrix of the first curved surface 2101 may be a spline curve formed by connecting a plurality of arc segments having different curvatures, or, as shown in fig. 1 and 2, the generatrix of the first curved surface 2101 may include a third arc segment 211, the third arc segment 211 protruding in a direction away from the center line 230 of the valve needle, and one end of the third arc segment 211 being connected to one end of the first arc segment 221. Alternatively, the distance from the center line 230 of the valve needle to the end of the third arc segment 211 away from the first arc segment 221 is greater than the distance from the center line 230 of the valve needle to the other end of the third arc segment 211 near the first arc segment 221, that is, the cross-section of the upper end of the seal segment 210 is greater than the cross-section of the lower end in the direction of the drawing of fig. 2, see fig. 2. In this embodiment, the generatrix of the first curved surface 2101 includes a third arc segment 211, which facilitates the sealing contact of the first curved surface 2101 with the inner wall (e.g., the conical surface shown in fig. 3 and 4) of the first valve port segment 11 while facilitating the machining.

Moreover, since the third arc segment 211 is connected with the first arc segment 221, there is no straight inner wall between the sealing segment 210 of the valve needle 200 and the inner wall of the adjusting segment 220, so that the condition that the flow is unchanged in the adjusting stage of the flow adjusting valve 1000 is further ensured.

It will be appreciated that in other embodiments of the present disclosure, the third arc segment 211 may project toward a direction proximate the centerline 230 of the valve needle, i.e., in a direction opposite to that shown in fig. 2.

In addition, it is understood that the generatrix of the first curved surface 2101 may be configured to have any suitable structure besides the third arc segment 211, for example, the generatrix of the first curved surface 2101 may be a spline curve formed by connecting a plurality of arc segments with different curvatures, which is not limited in this disclosure.

The radius of curvature of the third arc segment 211 is not limited in this disclosure, and as an alternative embodiment, the radius of curvature of the third arc segment 211 may be 0.5-2.1 mm.

It should be noted that the length of the sealing section 210 of the valve needle 200 is not limited in the present disclosure, and alternatively, the length of the sealing section 210 may be 1.3-3.5 mm. In embodiments where the bus bar of the seal segment 210 includes a third arc segment 211, the third arc segment 211 may have a length of 1.3 to 5mm.

In the present disclosure, the ratio of the length of the adjusting section 220 to the length of the sealing section 210 is not limited, and alternatively, the ratio of the length of the adjusting section 220 to the length of the sealing section 210 may be 0.3 to 3.8. In embodiments where the bus bar of the conditioning segment 220 includes a third arc segment 211 and the bus bar of the seal segment 210 includes a first arc segment 221, the ratio of the lengths of the first arc segment 221 to the third arc segment 211 may be 0.3-3.8.

In order to avoid the situation that the flow rate is unchanged during the adjustment process, as shown in fig. 1 and 2, in one implementation of the present disclosure, the intersection position of the first curved surface 2101 and the second curved surface 2201 may have no straight section, which further ensures that the flow rate of the flow rate adjusting valve 1000 is not unchanged during the adjustment stage.

In addition, in the embodiment where the first curved surface 2101 is an arc surface and the second curved surface 2201 is an arc surface, the first curved surface 2101 and the second curved surface 2201 may not be tangent, for example, the first arc segment 221 and the third arc segment are not tangent, so as to facilitate processing.

In the present disclosure, alternatively, referring to fig. 5-11, the first valve port segment 11 may be tapered, machined in aspect, and easily form a seal with the curved surface of the sealing segment 210. The inner wall of the second valve port section 12 may be a rotating surface, the rotation axis of the rotating surface is the center line 13 of the valve port, and the generatrix is a curve. The bus bar of the inner wall of the second valve port section 12 may be an arc section 121 protruding toward the direction close to the center line 13 of the valve port, and the distance between one end of the arc section 121 away from the first valve port section 11 and the center line 13 of the valve port is greater than the distance between the other end of the arc section 121 close to the first valve port section 11 and the center line 13 of the valve port.

Alternatively, the radius of curvature of the arc segment 121 of the inner wall of the second valve port segment 12 may be 3.5 to 6.2mm, and the length of the arc segment 121 in the axial direction of the valve port 10 may be 0.5 to 4.7mm, and further, may be 0.5 to 2.8mm. The ratio of the length of the arc segment 121 of the inner wall of the second valve port segment 12 in the axial direction of the valve port 10 to the length of the regulating segment 220 (the sum of the lengths of the first arc segment 221 and the second arc segment 222) may be 1.1 to 2.5.

In the embodiment in which the inner wall of the second valve port section 12 is an arc surface and the outer wall of the adjusting section 220 is an arc surface, under the cooperation of the adjusting section 220 and the second valve port section 12, the flow is more convenient to be adjusted rapidly and accurately, cavitation of the flow adjusting valve 1000 is reduced, and fluid flows more stably and noise is reduced.

Referring to fig. 1 to 4, when the valve needle 200 is in the position of closing the valve port 10, the first curved surface 2101 formed by rotation of the third curved line segment 211 on the valve needle 200 is in contact with and sealed with the inner wall of the first valve port segment 11 (i.e., the inner wall 111 of the tapered hole), the first curved line segment 221 on the valve needle 200 is opposite to the curved line segment of the second valve port segment 12, and during the axial movement of the valve needle 200 along the valve port 10, the gap between the first curved line segment 221 and the curved line segment on the second valve port segment 12 changes, resulting in a change in the flow area of the valve port 10.

In the present disclosure, as shown in fig. 5, in one embodiment of the present disclosure, the valve seat 100 may be an insert for embedding within the valve body 600 of the flow regulating valve 1000. That is, the valve seat 100 may be a separate component, and the valve seat 100 may be assembled into the valve body 600 after the valve port 10 is machined. So designed, the valve port 10 is convenient to process, and meanwhile, the shape and the processing precision of the inner walls of the first valve port section 11 and the second valve port section 12 can be guaranteed to meet the requirements, especially in the embodiment that the first valve port section 11 shown in fig. 3 and 8 is a conical hole, and the inner wall of the second valve port section 12 is an arc-shaped curved surface, the inner wall 111 of the conical hole and the arc-shaped curved surface need higher processing precision to guarantee the reliability of sealing and precise flow control, and the valve seat 100 is an insert, so that the inner wall 111 and the arc-shaped curved surface of the conical hole with higher processing precision requirements meet the design requirements, and the precision is easier to guarantee. While also facilitating a reduction in the volume of the valve seat 100.

When installed, referring to fig. 5, the bottom surface of the valve seat 100 may be positioned against the bottom surface of the cavity inside the valve body 600 for receiving the valve seat 100. At this time, the valve port 10 communicates with the first opening 620 in the valve body 600.

Alternatively, as shown in FIG. 5, the inner wall of the second valve port segment 12 is directly connected to the inner wall of the first opening 620, and the inner wall of the valve port 10 has the same curvature as the inner wall of the first opening 620. In this embodiment, since the curvature of the inner wall of the second valve port section 12 is the same as that of the inner wall of the first valve port section 11, when the two are curved surfaces as shown in fig. 8, there is no straight portion or protrusion or groove therebetween, and when the inner wall of the first opening 620 also participates in flow adjustment, the flow can be adjusted more quickly at the moment when the valve needle 200 is opened, so that there is no section with constant flow value in the flow curve, and at the same time, abrupt change of flow adjustment is avoided.

It is understood that in other embodiments of the present disclosure, the valve seat 100 may be an integrally formed structure with the valve body 600. For example, referring to fig. 6 and 9-11, the valve seat 100 is integral with the valve body 600, and the valve port 10 is the first opening 620 of the valve body 600.

The specific structure of the flow rate control valve 1000 is not limited in this disclosure, and as shown in fig. 5 and 6, in this disclosure, the flow rate control valve 1000 may be an electronic expansion valve, which may further include a core cover 310, a magnetic rotor 320, a locking block 330, a screw 340 (such as a metal screw), a limit spring 350, a valve cartridge 400, a valve needle cartridge cover 510, a valve needle spring 520, and a valve body 600, in addition to the valve seat 100 and the valve needle 200 described above. The valve body 600 is formed with a first opening 620 and a second opening 630. In fig. 8, the valve seat 100 is disposed at the position of the first opening 620, and the valve port 10 on the valve seat 100 corresponds to the first opening 620, in fig. 9, the valve port 10 of the valve seat 100 is the second opening 630, and the valve needle 200 is used for adjusting the flow area of the valve port 10, so as to adjust the flow rate between the first opening 620 and the second opening 630.

The lower end of the valve core 400 cover is opened and connected with the upper end of the valve body 600, the valve body 600 is provided with a valve core cavity 610 for accommodating the valve core 400, the lower part of the valve core 400 is fixed in the valve core cavity 610, the upper part of the valve core 400 extends into the iron core cover 310, and the magnetic rotor 320 is positioned in the iron core cover 310 and sleeved outside the valve core 400. The valve core 400 is provided with a through hole extending along the axial direction thereof, the lower end of the through hole is communicated with a containing cavity of the lower end of the valve core 400 for containing the valve needle 200, the screw 340 is arranged in the through hole, the part of the upper end of the screw 340 penetrating out of the upper end face of the valve core 400 is fixed with the magnetic rotor 320 through the locking block 330, and the lower end of the screw 340 is positioned in the containing cavity. An internal thread section is arranged in the through hole, an external thread section is arranged on the screw 340, and the valve core 400 and the screw 340 are constructed into a screw-nut mechanism. The end of the valve needle 200 away from the valve seat 100 is formed with a valve needle cavity with an open upper end, a valve needle cylinder cover 510 is arranged at the upper end of the valve needle 200, the lower end of the valve needle spring 520 is abutted to the bottom wall of the valve needle cavity, and the upper end of the valve needle spring 520 is abutted to the screw 340 penetrating through the valve needle 200 cover.

During operation, the electromagnetic coil can control the rotation of the magnetic rotor 320, the magnetic rotor 320 drives the screw 340 to rotate, and the screw 340 and the valve core 400 are configured as a screw-nut mechanism, so that the valve core 400 is fixed, and the screw 340 moves towards a direction approaching or separating from the valve needle spring 520 while rotating, thereby enabling the valve needle 200 to approach or separate from the valve port 10 on the valve seat 100, and further adjusting the flow area of the second valve port section 12 on the valve port 10, so as to realize flow adjustment.

As shown in fig. 5 and 6, the flow regulating valve 1000 further includes a first sealing ring 710 and a second sealing ring 720, a first annular groove and a second annular groove are provided on a sidewall of the valve body 600, the first sealing ring 710 is provided in the first annular groove, the second sealing ring 720 is provided in the second groove, and the first sealing ring 710 and the second sealing ring 720 are used for sealing a gap between the valve body 600 and an external housing.

As shown in fig. 5 and 6, the upper end surface of the needle spring 520 abuts against the ball head of the screw 340, the lower end surface of the needle spring 520 abuts against the bottom wall of the cavity of the needle 200, and the needle 200 cover fixes the ball head of the screw 340 in the cavity of the needle 200. The outer sidewall of the needle cartridge cover 510 is sealingly secured to the inner sidewall of the needle 200. The outer side wall of the valve needle 200 is in clearance fit with the inner side wall of the valve cartridge 400, the valve needle 200 moves up and down in the receiving chamber, and the outer side wall of the valve needle 200 has no fit relationship with the inner side wall of the valve body 600. The outer side wall of the valve needle 200 is provided with an airflow channel, so that the upper cavity and the lower cavity of the outer side wall of the valve needle 200 are communicated, and the phenomenon of movement vacuum is prevented from causing unsmooth movement of the valve needle 200. The upper end face of the valve needle spring 520 is provided with a bending line segment towards the center, and the bending line segment is processed through a grinding process, so that the rotating resistance of the screw 340 can be effectively improved when the screw 340 is abutted against the ball head of the screw, and the abnormal rotating noise is reduced.

According to another aspect of the present disclosure, there is provided a vehicle including the flow regulating valve described above. The flow regulating valve may be applied to a thermal management system on a vehicle, for example, may be used in an air conditioning system, a battery cooling or heating system, etc. of a vehicle for regulating the flow of refrigerant.

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 (14)

1. A valve needle of a flow regulating valve, characterized in that the valve needle is used for being matched with a valve port of the flow regulating valve to regulate the flow of the flow regulating valve, the valve needle comprises a sealing section and a regulating section which are connected, and the regulating section is connected to one side of the sealing section far away from a screw rod;

the outer wall of the sealing section comprises a first curved surface, the first curved surface is used for being in contact with the inner wall of the valve port to seal the valve port, the first curved surface is a rotating surface, the rotating axis of the first curved surface is the central line of the valve needle, and the generatrix of the first curved surface is a curve;

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

2. The valve needle of claim 1, wherein the second curved surface is a surface of revolution, the axis of revolution of the second curved surface is a centerline of the valve needle, and a generatrix of the second curved surface comprises a first arcuate segment that projects away from the centerline of the valve needle;

the distance between one end of the first arc section away from the first curved surface and the central line of the valve needle is greater than the distance between the other end of the first arc section close to the first curved surface and the central line of the valve needle.

3. A valve needle according to claim 2, wherein the radius of curvature of the first arc segment is 0.1-0.7 mm.

4. The valve needle of claim 2, wherein the generatrix of the second curved surface further comprises a second arcuate segment, the second arcuate segment protruding in a direction away from the centerline of the valve needle, one end of the second arcuate segment being connected to an end of the first arcuate segment away from the first curved surface, the other end of the second arcuate segment extending to the centerline position of the valve needle.

5. A valve needle according to claim 1, characterized in that the length of the adjusting section in the axial direction of the valve needle is 0.45-4.65 mm.

6. The valve needle of any one of claims 2-4, wherein the generatrix of the first curved surface comprises a third arcuate segment that projects away from the centerline of the valve needle, an end of the third arcuate segment being connected to an end of the first arcuate segment.

7. The valve needle of claim 6, wherein an end of the third arcuate segment distal from the first arcuate segment is spaced from a centerline of the valve needle more than an end of the third arcuate segment proximal to the first arcuate segment is spaced from the centerline of the valve needle.

8. The valve needle of claim 7, wherein the radius of curvature of the third arcuate segment is 0.5-2.1 mm.

9. The valve needle of claim 7, wherein the third arcuate segment has a length of 1.3-3.5 mm.

10. A valve needle according to any one of claims 1-5, characterized in that the ratio of the length of the adjusting section to the sealing section is 0.3-3.8.

11. A valve needle according to any one of claims 1-5, wherein the first curved surface intersects the second curved surface without a straight segment.

12. The valve needle of claim 11, wherein the first curved surface is an arcuate surface and the second curved surface is an arcuate surface, the first curved surface being non-tangential to the second curved surface.

13. A flow regulating valve comprising a valve needle according to any one of claims 1-12.

14. A vehicle comprising a flow regulating valve according to claim 13.

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