Control valve

Abstract

The utility model provides a control valve which comprises a valve body assembly, a valve core assembly, a valve core assembly and a valve core assembly. The valve needle assembly is movably arranged in the circulation cavity, and the valve needle assembly is arranged corresponding to the valve port so as to block or open the valve port; the valve seat assembly is provided with a connecting seat and a guide sleeve, the connecting seat is arranged on the outer side of the guide sleeve in a sleeving mode, the connecting seat is fixedly connected with the valve body assembly, the valve needle assembly is arranged in the guide sleeve in a penetrating mode, the guide sleeve can guide movement of the valve needle assembly, and a first rotation stopping structure is arranged between the inner wall of the guide sleeve and the valve needle assembly so as to limit circumferential rotation of the valve needle assembly; and a second rotation stopping structure is arranged between the connecting seat and the guide sleeve so as to limit the relative rotation of the guide sleeve relative to the connecting seat. By means of the technical scheme, the problem that in the prior art, a valve body is difficult to machine can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a control valve. Background Art

[0002] Currently, in the field of control valves, a control valve generally includes a drive component, a valve body, and a valve needle. The drive component drives the valve needle to move relative to the valve port to adjust the flow rate of the fluid at the valve port.

[0003] In the prior art, a drive assembly typically engages with a valve needle through a threaded connection. The valve needle is inserted into the valve body and has a stopper structure between the valve body and the valve needle to limit relative rotation between the two. During the process of driving the valve needle to rotate, the drive assembly, through the threaded structure, can convert the circumferential rotation of the valve needle into linear motion relative to the valve port, thereby adjusting the distance between the valve needle and the valve port and, in turn, regulating the flow rate at the valve port. However, the valve body structure is typically complex, and machining the stopper structure between the valve needle and the inner sidewall of the valve body requires a tool to extend into the interior of the valve body. Because the valve needle is typically relatively small, the working space during valve body machining is limited, making valve body machining more inconvenient. Utility Model Content

[0004] The utility model provides a control valve to solve the problem in the prior art that valve body processing is difficult.

[0005] The utility model provides a control valve, which includes: a valve body assembly, which has a circulation cavity, and a valve port is arranged in the circulation cavity; a valve needle assembly, which is movably arranged in the circulation cavity, and the valve needle assembly is arranged corresponding to the valve port to block or open the valve port; a driving assembly, which has a screw, and the screw is threadedly connected to the valve needle assembly, and the screw can be rotated to drive the valve needle assembly to move in the circulation cavity; a valve seat assembly, which has a connecting seat and a guide sleeve, and the connecting seat sleeve is arranged on the outside of the guide sleeve, and the connecting seat is fixedly connected to the valve body assembly, and the valve needle assembly is inserted into the guide sleeve, and the guide sleeve can guide the movement of the valve needle assembly, and a first anti-rotation structure is provided between the inner wall of the guide sleeve and the valve needle assembly to limit the circumferential rotation of the valve needle assembly; wherein a second anti-rotation structure is provided between the connecting seat and the guide sleeve to limit the relative rotation of the guide sleeve relative to the connecting seat.

[0006] Furthermore, the valve seat assembly also includes a fixing member, through which the guide sleeve is fixed in the connecting seat, the fixing member has a mounting hole, the guide sleeve is passed through the mounting hole, and the second anti-rotation structure is arranged between the inner wall of the mounting hole and the outer wall of the guide sleeve.

[0007] Furthermore, the guide sleeve has an inserting section, which is inserted into the mounting hole. A second section is provided on the side wall of the inserting section. The shape of the mounting hole is adapted to the cross-sectional shape of the inserting section along the axial direction. The mounting hole and the second section cooperate to form a second anti-rotation structure.

[0008] Furthermore, a plurality of second cross-sections are provided, and the plurality of second cross-sections are arranged in a ring shape.

[0009] Furthermore, a first section is provided on the outer wall of the guide matching portion of the valve needle assembly, the inner wall of the guide sleeve is adapted to the shape of the outer wall of the valve needle assembly, and the first section cooperates with the inner wall of the guide sleeve to form a first anti-rotation structure.

[0010] Furthermore, the guide sleeve has an extension section and an inserting section that are connected to each other. The inserting section is inserted in the mounting hole. The outer diameter of the inserting section is smaller than the outer diameter of the extension section. There is a step surface between the inserting section and the extension section. The step surface abuts against the fixing piece to limit the displacement of the guide sleeve toward the valve port.

[0011] Furthermore, a limiting protrusion is provided on the inner wall of the connecting seat, and the end surface of the guide sleeve away from the valve port abuts against the limiting protrusion to limit the displacement of the guide sleeve away from the valve port.

[0012] Furthermore, the connecting seat has a guide portion, and the valve needle assembly also has a matching portion, which is movably arranged in the guide portion, and a sealing member is provided between the outer wall of the matching portion and the inner wall of the guide portion.

[0013] Furthermore, the drive assembly also includes a rotor, one end of the screw is fixedly connected to the rotor, the rotor is used to drive the screw to rotate, the valve needle assembly has a threaded hole, the screw is inserted into the threaded hole, and the screw is threaded in the threaded hole.

[0014] Furthermore, a first flow port, a second flow port and a third flow port are sequentially arranged on the side wall of the flow cavity, a first valve port is arranged between the first flow port and the second flow port, the first flow port and the second flow port are connected through the first valve port, a second valve port is arranged between the second flow port and the third flow port, the second flow port and the third flow port are connected through the second valve port, and the valve needle assembly has a sealing part, which is movably arranged between the first valve port and the second valve port to seal the first valve port or the second valve port.

[0015] By applying the technical solution provided by the present invention, the guide sleeve can realize the driving of the valve needle assembly through the first anti-rotation structure in conjunction with the screw, and by setting the second anti-rotation structure, the rotation of the guide sleeve relative to the connecting seat can be limited, ensuring that the guide sleeve will not rotate relative to the valve needle assembly, thereby improving the guiding effect of the guide sleeve on the valve needle assembly. In this application, the valve seat assembly is set as two parts consisting of a connecting seat and a guide sleeve. When processing the guide sleeve, the guide sleeve can be processed separately, which is convenient for clamping and reduces the processing difficulty of the first anti-rotation structure. At the same time, it can also expand the processing space of the valve seat assembly in the connecting seat part, reduce the processing difficulty of the second anti-rotation structure part, and thus facilitate the overall processing of the valve seat assembly and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 Shows a structural schematic diagram of the valve seat assembly provided by the utility model;

[0018] Figure 2 Shows a schematic structural diagram of the guide sleeve provided by the utility model;

[0019] Figure 3 Shows a schematic structural diagram of the fixing member provided by the utility model;

[0020] Figure 4 A bottom view of the valve seat assembly provided by the present invention is shown;

[0021] Figure 5 Shows a schematic structural diagram of part of the valve needle assembly provided by the utility model;

[0022] Figure 6 A schematic top view of the valve seat assembly provided by the present invention is shown;

[0023] Figure 7 It shows a schematic structural diagram of the control valve provided by the present invention when the first valve port is blocked;

[0024] Figure 8 The figure shows a structural diagram of the control valve provided by the present invention when the second valve port is blocked.

[0025] The above drawings include the following reference numerals:

[0026] 100. Valve body assembly;

[0027] 110, circulation cavity; 111, first circulation port; 112, second circulation port; 113, third circulation port;

[0028] 101, first valve port; 102, second valve port;

[0029] 200, valve needle assembly;

[0030] 201, first elastic member; 202, second elastic member;

[0031] 210, first valve needle; 212, first section; 220, second valve needle;

[0032] 300, valve seat assembly;

[0033] 301, guide portion; 302, plug-in portion;

[0034] 310, connecting seat; 311, limiting protrusion;

[0035] 320, guide sleeve; 321, plug-in section; 3211, second section; 322, extension section;

[0036] 330, fixing piece; 331, mounting hole;

[0037] 340, seals;

[0038] 400, blocking parts;

[0039] 500, drive assembly; 510, rotor; 520, screw;

[0040] 600, Balance channel. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figures 1 to 8 As shown, an embodiment of the present invention provides a control valve, which includes a valve body assembly 100, a valve needle assembly 200, and a valve seat assembly 300. The valve body assembly 100 has a flow chamber 110, in which a valve port is provided. The valve needle assembly 200 is movably provided in the flow chamber 110. The valve needle assembly 200 is provided corresponding to the valve port to block or open the valve port. The valve seat assembly 300 has a connecting seat 310 and a guide sleeve 320. The connecting seat 310 is sleeved on the outside of the guide sleeve 320. The connecting seat 310 is fixedly connected to the valve body assembly 100. The valve needle assembly 200 is inserted into the guide sleeve 320. The guide sleeve 320 can guide the movement of the valve needle assembly 200. A first anti-rotation structure is provided between the inner wall of the guide sleeve 320 and the valve needle assembly 200 to limit the circumferential rotation of the valve needle assembly 200. A second anti-rotation structure is provided between the connecting base 310 and the guide sleeve 320 to limit the relative rotation of the guide sleeve 320 relative to the connecting base 310 .

[0043] The control valve also includes a drive assembly 500, which includes a rotor 510 and a screw 520. One end of the screw 520 is fixedly connected to the rotor 510, and the rotor 510 is used to drive the screw 520 to rotate. The valve needle assembly 200 has a threaded hole, and the screw 520 is inserted into the threaded hole and screwed into the threaded hole. This arrangement restricts the rotation of the valve needle assembly 200 relative to the valve seat assembly 300, and the drive assembly 500 can drive the valve needle assembly 200 to move linearly, thereby achieving control of fluid flow.

[0044] By applying the technical solution provided by the present invention, the guide sleeve 320 can drive the valve needle assembly 200 through the first anti-rotation structure in conjunction with the screw 520, and the second anti-rotation structure can also limit the rotation of the guide sleeve 320 relative to the connecting seat 310, ensuring that the guide sleeve 320 does not rotate relative to the valve needle assembly 200, thereby improving the guiding effect of the guide sleeve 320 on the valve needle assembly 200. In this application, the valve seat assembly 300 is configured as two parts consisting of the connecting seat 310 and the guide sleeve 320. When processing the guide sleeve 320, the guide sleeve 320 can be processed separately, which facilitates the fixture support and reduces the processing difficulty of the first anti-rotation structure. At the same time, it can also expand the processing space of the valve seat assembly 300 in the connecting seat 310 part, reducing the processing difficulty of the second anti-rotation structure, thereby facilitating the overall processing of the valve seat assembly 300 and improving production efficiency.

[0045] Specifically, the guide sleeve 320 can be formed through integral processing, which further reduces the processing difficulty of the guide sleeve 320 and ensures the accuracy of the matching between the guide sleeve 320 and the valve needle assembly 200.

[0046] Alternatively, the guide sleeve 320 may be formed by plastic injection molding or metal powder metallurgy processing.

[0047] Furthermore, the valve seat assembly 300 also includes a fixing member 330, through which the guide sleeve 320 is fixedly disposed within the connecting seat 310. The fixing member 330 has a mounting hole 331, through which the guide sleeve 320 is inserted. A second anti-rotation structure is disposed between the inner wall of the mounting hole 331 and the outer wall of the guide sleeve 320. This arrangement allows the fixing member 330 to simultaneously secure the guide sleeve 320 and prevent its rotation, ensuring a stable fit between the guide sleeve 320 and the screw 520. Furthermore, the provision of the fixing member 330 allows the second anti-rotation structure to be disposed between the inner wall of the mounting hole 331 and the outer wall of the guide sleeve 320, making the fabrication of the second anti-rotation structure simpler and more convenient.

[0048] Specifically, refer to Figures 2 to 4As shown, the guide sleeve 320 includes an inserting section 321, which is inserted into the mounting hole 331. A second cut surface 3211 is provided on the side wall of the inserting section 321. The shape of the mounting hole 331 matches the cross-sectional shape of the inserting section 321 along the axial direction. The mounting hole 331 and the second cut surface 3211 cooperate to form a second anti-rotation structure. With this arrangement, after the inserting section 321 is inserted into the mounting hole 331, the second cut surface 3211 can cooperate with the shape of the inner wall of the mounting hole 331 to prevent the guide sleeve 320 from rotating.

[0049] Furthermore, a plurality of second cut surfaces 3211 may be provided, and the plurality of second cut surfaces 3211 are arranged in an annular shape, so as to improve the anti-rotation effect of the second cut surface 3211 .

[0050] Furthermore, the plurality of second cross-sections 3211 may be arranged to form a regular polygon, so that when the guide sleeve 320 and the fixing member 330 are connected, there is no need to align the second cross-sections 3211 and the mounting hole 331 , thereby improving the installation efficiency.

[0051] In other optional embodiments of the present application, the second anti-rotation structure can be set as a fixed protrusion structure, as long as it can achieve the effect of limiting the rotation of the guide sleeve 320.

[0052] Reference Figures 1 to 3 As shown, the guide sleeve 320 includes an interconnected extension section 322 and a plug section 321. The plug section 321 is inserted into the mounting hole 331. The outer diameter of the plug section 321 is smaller than that of the extension section 322. A stepped surface is formed between the plug section 321 and the extension section 322. The stepped surface abuts against the fixing member 330 to limit the displacement of the guide sleeve 320 toward the valve port. This arrangement allows the fixing member 330 to simultaneously limit the rotation of the guide sleeve 320 while also providing a lower limit for the fixing member 330, ensuring the stability of the guide sleeve 320 installed in the connecting seat 310 and preventing axial movement of the guide sleeve 320.

[0053] Specifically, a limiting protrusion 311 is provided on the inner wall of the connecting seat 310. The end surface of the guide sleeve 320, which is away from the valve port, abuts against the limiting protrusion 311 to limit the displacement of the guide sleeve 320 away from the valve port. This arrangement allows the limiting protrusion 311 to achieve an upper limit on the guide sleeve 320, ensuring the stability of the installation of the guide sleeve 320. In addition, the limiting protrusion 311 can also provide a positioning reference for the guide sleeve 320 during installation, facilitating the installation of the guide sleeve 320.

[0054] Specifically in the present application, the connecting seat 310 has a plug-in portion 302, which is used to accommodate the guide sleeve 320. The plug-in portion 302 has a first end and a second end that are axially opposite to each other along the connecting seat 310. The limiting protrusion 311 can be set at the first end or the second end, and the fixing member 330 is correspondingly set at the other end of the plug-in portion 302.

[0055] In other embodiments of the present application, the second anti-rotation structure can also be directly processed and formed by the connecting seat 310, and the limiting protrusion 311 can be processed and formed by a part fixed on the connecting seat 310, as long as it can play a limiting role on the guide sleeve 320 in the circumferential and axial directions.

[0056] Reference Figure 5 and Figure 6 As shown, a first cut surface 212 is provided on the outer wall of the guide sleeve 320-guided portion of the valve needle assembly 200. The inner wall of the guide sleeve 320 matches the outer wall of the valve needle assembly 200 in shape, and the first cut surface 212 cooperates with the inner wall of the guide sleeve 320 to form a first anti-rotation structure. This arrangement prevents the guide sleeve 320 from rotating due to the first cut surface 212. Similarly, multiple first cut surfaces 212 can be provided, arranged in an annular pattern to enhance the anti-rotation effect of the first cut surface 212.

[0057] Specifically in this application, the connecting seat 310 has a guide portion 301, and the valve needle assembly 200 also has a matching portion, which is movably arranged in the guide portion 301. The matching portion and the guide portion 301 are guided and matched to further improve the matching effect between the valve needle assembly 200 and the valve seat assembly 300, ensuring that the valve needle assembly 200 can be accurately set at the valve port, thereby ensuring the use effect of the control valve.

[0058] In some feasible embodiments of the present application, the side wall of the circulation cavity 110 has a first circulation port 111, a second circulation port 112 and a third circulation port 113 arranged in sequence, a first valve port 101 is arranged between the first circulation port 111 and the second circulation port 112, the first circulation port 111 and the second circulation port 112 are connected through the first valve port 101, a second valve port 102 is arranged between the second circulation port 112 and the third circulation port 113, the second circulation port 112 and the third circulation port 113 are connected through the second valve port 102, the valve needle assembly 200 has a blocking member 400, the blocking member 400 is movably arranged between the first valve port 101 and the second valve port 102 to block the first valve port 101 or the second valve port 102. Through the above arrangement, as Figure 7 As shown, when the blocking member 400 blocks the first valve port 101, the second flow port 112 can communicate with the third flow port 113; Figure 8As shown, when the blocking member 400 blocks the second valve port 102, the second flow port 112 can communicate with the first flow port 111. The valve needle assembly 200 drives the blocking member 400 to move between the first valve port 101 and the second valve port 102 to block or open the first valve port 101 and the second valve port 102. This arrangement can realize the flow channel switching function of the control valve, that is, the control valve is now a three-way valve.

[0059] In some other feasible embodiments of the present application, only two flow ports are provided on the side wall of the flow chamber 110, and the two flow ports are connected by a valve port, which is a conical port. The drive assembly 500 can control the distance that the valve needle assembly 200 extends into the valve port to adjust the flow through the valve port, that is, the control valve is an electronic expansion valve at this time.

[0060] Similarly, the control valve provided in the present application can also be applied to other forms of flow control valves or valve bodies such as stop valves to achieve fluid control.

[0061] When the control valve provided in the present application is a three-way valve, the valve needle assembly 200 has a first valve needle 210 and a second valve needle 220 connected in sequence, and a blocking member 400 is provided at one end of the second valve needle 220 away from the first valve needle 210, and a first elastic member 201 and a second elastic member 202 are provided between the first valve needle 210 and the second valve needle 220. When the blocking member 400 blocks the first valve port 101, the combined force provided by the first elastic member 201 and the second elastic member 202 to the second valve needle 220 is a first elastic force toward the first valve port 101, so as to provide a pre-tightening force for the blocking member 400 to block the first valve port 101. When the second valve port 102 is opened, the combined force provided by the first elastic member 201 and the second elastic member 202 to the second valve needle 220 is a second elastic force toward the second valve port 102, so as to provide a pre-tightening force for the blocking member 400 to block the second valve port 102, and the first elastic force is equal to the second elastic force. In this way, the pre-tightening force when the blocking member 400 blocks the first valve port 101 can be equal to the pre-tightening force when blocking the second valve port 102. While ensuring the sealing effect of the blocking member 400, it can ensure that the valve opening capabilities of the solenoid valve at the first valve port 101 and the second valve port 102 are consistent, which is convenient for regulating the valve opening performance, so as to improve the valve opening capability of the three-way valve.

[0062] Specifically in this application, refer to Figure 8As shown, the valve needle assembly 200 is provided with a balancing channel 600. One end of the balancing channel 600 is connected to the guide portion 301, and the other end of the balancing channel 600 is connected to the flow chamber 110. Through this arrangement, the flow chamber 110 or the third flow port 113 is connected and can flow through the balancing channel 600 into the chamber between the guide portion 301 and the second valve needle 220. This ensures that the pressure on the second valve needle 220 at both ends of the guide portion 301 is equal, thereby ensuring the movement of the valve needle assembly 200.

[0063] Furthermore, a seal 340 is provided between the outer wall of the fitting portion and the inner wall of the guide portion 301. The seal 340 can prevent the fluid from leaking to the outside through the gap between the fitting portion and the guide portion 301, thereby reducing internal leakage of the three-way valve and improving the use effect of the three-way valve.

[0064] Optionally, the sealing member 340 may be a sealing ring.

[0065] Optionally, a sealing groove may be provided on the inner side wall of the guide portion 301 or the outer side wall of the matching portion to accommodate the sealing member 340 .

[0066] Preferably, the sealing groove is provided on the outer side wall of the matching portion to facilitate the processing and forming of the sealing groove.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0069] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0071] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A control valve, characterized in that: The control valve comprises: The valve body assembly (100) has a circulation cavity (110), wherein a valve port is provided in the circulation cavity (110); A valve needle assembly (200) is movably disposed in the circulation cavity (110), and the valve needle assembly (200) is disposed corresponding to the valve port to block or open the valve port; a drive assembly (500) having a screw (520), wherein the screw (520) is threadedly connected to the valve needle assembly (200), and the screw (520) is capable of rotating to drive the valve needle assembly (200) to move in the flow chamber (110); The valve seat assembly (300) comprises a connecting seat (310) and a guide sleeve (320), wherein the connecting seat (310) is sleeved on the outside of the guide sleeve (320), the connecting seat (310) is fixedly connected to the valve body assembly (100), the valve needle assembly (200) is inserted into the guide sleeve (320), the guide sleeve (320) is capable of guiding the movement of the valve needle assembly (200), and a first anti-rotation structure is provided between the inner wall of the guide sleeve (320) and the valve needle assembly (200) to limit the circumferential rotation of the valve needle assembly (200); Wherein, a second anti-rotation structure is provided between the connecting seat (310) and the guide sleeve (320) to limit the relative rotation of the guide sleeve (320) relative to the connecting seat (310).

2. The control valve according to claim 1, characterized in that The valve seat assembly (300) further includes a fixing member (330), the guide sleeve (320) being fixedly arranged in the connecting seat (310) via the fixing member (330), the fixing member (330) having a mounting hole (331), the guide sleeve (320) being inserted into the mounting hole (331), and the second anti-rotation structure being arranged between the inner wall of the mounting hole (331) and the outer wall of the guide sleeve (320).

3. The control valve according to claim 2, characterized in that The guide sleeve (320) has an inserting section (321), the inserting section (321) is inserted into the mounting hole (331), a second section (3211) is provided on the side wall of the inserting section (321), the shape of the mounting hole (331) is adapted to the cross-sectional shape of the inserting section (321) along the axial direction, and the mounting hole (331) cooperates with the second section (3211) to form the second anti-rotation structure.

4. The control valve according to claim 3, characterized in that There are multiple second cross-sections (3211), and the multiple second cross-sections (3211) are arranged in a ring shape.

5. The control valve according to claim 1, wherein: A first cut surface (212) is provided on the outer wall of the guide matching portion of the valve needle assembly (200) and the guide sleeve (320), and the inner wall of the guide sleeve (320) is adapted to the shape of the outer wall of the valve needle assembly (200), and the first cut surface (212) cooperates with the inner wall of the guide sleeve (320) to form the first anti-rotation structure.

6. The control valve according to claim 2, characterized in that The guide sleeve (320) has an extension section (322) and an inserting section (321) connected to each other, the inserting section (321) is inserted into the mounting hole (331), and a stepped surface is provided between the inserting section (321) and the extension section (322), and the stepped surface is in abutment with the fixing member (330).

7. The control valve according to claim 2, characterized in that A limiting protrusion (311) is provided on the inner wall of the connecting seat (310), and the end surface of the guide sleeve (320) away from the fixing member (330) is in abutment with the limiting protrusion (311).

8. The control valve according to claim 1, wherein: The connecting seat (310) has a guide portion (301), and the valve needle assembly (200) also has a matching portion, which is movably arranged in the guide portion (301), and a sealing member (340) is provided between the outer wall of the matching portion and the inner wall of the guide portion (301).

9. The control valve according to claim 1, wherein: The driving assembly (500) further includes a rotor (510), one end of the screw rod (520) is fixedly connected to the rotor (510), and the rotor (510) is used to drive the screw rod (520) to rotate. The valve needle assembly (200) has a threaded hole, and the screw rod (520) is screwed into the threaded hole.

10. The control valve according to claim 1, wherein: The side wall of the circulation cavity (110) has a first circulation port (111), a second circulation port (112) and a third circulation port (113) arranged in sequence, a first valve port (101) is arranged between the first circulation port (111) and the second circulation port (112), the first circulation port (111) and the second circulation port (112) are connected through the first valve port (101), a second valve port (102) is arranged between the second circulation port (112) and the third circulation port (113), the second circulation port (112) and the third circulation port (113) are connected through the second valve port (102), the valve needle assembly (200) has a blocking member (400), the blocking member (400) is movably arranged between the first valve port (101) and the second valve port (102) to block the first valve port (101) or the second valve port (102).

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