Control valve

Abstract

The control valve is characterized in that a valve seat assembly is provided with a through hole, one end of the through hole forms a first communication port, the peripheral wall of the valve seat assembly is provided with a second communication port communicated with the through hole, the hole wall of the through hole is provided with an annular protruding part, and the protruding part is located on the side, close to the first communication port, of the second communication port; the valve element assembly is movably arranged in the through hole in a penetrating mode in the axial direction of the valve seat assembly, and the peripheral wall of the valve element assembly is suitable for abutting against the protruding part. The driving assembly is arranged on the side, away from the first communicating opening, of the second communicating opening, connected with the valve element assembly and used for driving the valve element assembly to move in the axial direction of the valve seat assembly. The sealing piece is annular, is located in the through hole, is arranged on the side, close to the first communication opening, of the protruding part, and is used for sealing the through hole and the first communication opening. According to the control valve, reliable sealing can be guaranteed, the low inner leakage performance is guaranteed, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant control elements, and more specifically, to a control valve. Background Art

[0002] In the related art, the control valve is closed and opened by controlling the movement of the valve core assembly of the control valve. However, when the valve core assembly is closed, an unreliable seal may occur, resulting in internal leakage, which affects the normal use of the control valve. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a control valve, which can ensure reliable sealing, low internal leakage performance, and reduce production costs.

[0004] According to the control valve of the embodiment of the utility model, it includes: a valve seat assembly, the valve seat assembly has a through hole extending in the axial direction of the valve seat assembly, one end of the through hole is formed as a first connecting port, a second connecting port connected to the through hole is provided on the peripheral wall of the valve seat assembly, and an annular protrusion is provided on the hole wall of the through hole, and the protrusion is located on the side of the second connecting port close to the first connecting port; a valve core assembly, the valve core assembly is movably inserted into the through hole along the axial direction of the valve seat assembly, and the outer peripheral wall of the valve core assembly is suitable for abutting against the protrusion; a driving assembly, the driving assembly is provided on the side of the second connecting port away from the first connecting port, the driving assembly is connected to the valve core assembly, and is used to drive the valve core assembly to move in the axial direction of the valve seat assembly; a sealing member, the sealing member is formed in an annular shape, the sealing member is located in the through hole and is provided on the side of the protrusion close to the first connecting port, and the sealing member is used for sealing the through hole and the first connecting port.

[0005] According to the control valve of the embodiment of the utility model, an annular protrusion is provided on the hole wall of the through hole of the valve seat assembly, the protrusion is located on the side of the second connecting port close to the first connecting port, the outer peripheral wall of the valve core assembly is suitable for abutting against the protrusion, the sealing member is formed in a ring shape, the sealing member is located in the through hole and is provided on the side of the protrusion close to the first connecting port, the sealing member is used for sealing the through hole and the first connecting port, so that the valve core assembly can achieve double sealing through the cooperation with the protrusion and the sealing member, avoiding the problems of high precision requirements and complex structure caused by only using the protrusion to achieve sealing, thereby reducing the production cost of the control valve, and avoiding the problems of creep of the seal after multiple valve closings caused by only using the seal, and reducing the requirement of the seal under relatively small deformation, which is beneficial to improving the performance of the control valve and ensuring the low internal leakage performance of the control valve.

[0006] In addition, the control valve according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to the control valve of some embodiments of the present invention, one end of the valve core assembly away from the driving assembly abuts against the sealing member; or, one end of the valve core assembly away from the driving assembly is inserted into the sealing member, and the outer peripheral wall of the valve core assembly and the inner peripheral wall of the sealing member are sealed.

[0008] According to some embodiments of the present invention, the control valve further comprises: a stop member, which is located on a side of the sealing member away from the driving assembly and is fixed on the valve seat assembly, and the sealing member is supported on the stop member.

[0009] According to some embodiments of the utility model, one end of the valve seat assembly provided with the first connecting port is provided with a groove, the through hole penetrates the bottom wall of the groove, the stop member is fixed in the groove, and the sealing member is located between the stop member and the bottom wall of the groove and abuts against the bottom wall of the groove.

[0010] According to some embodiments of the utility model, the valve core assembly includes: a connecting rod, the driving assembly is connected to the connecting rod, and is used to drive the connecting rod to move along the axial direction of the valve seat assembly; a valve needle, the valve needle is rotatably connected to one end of the connecting rod away from the driving assembly, and the valve needle is suitable for abutting against the protrusion.

[0011] According to some embodiments of the utility model, the driving assembly includes: a rotor, on which a first matching portion is provided; a rotating shaft, on which the rotor is sleeved, the rotating shaft and the rotor are an integral part, and the rotating shaft is provided with a second matching portion that matches the first matching portion to limit the relative rotation of the rotor and the rotating shaft.

[0012] According to some embodiments of the present invention, the second matching portion is formed as a connecting hole extending in the radial direction of the rotating shaft, and the first matching portion is inserted into the connecting hole.

[0013] According to some embodiments of the utility model, the first matching portion includes: an extension portion, which is located on the radial inner side of the rotor and is connected to the radial inner side of the rotor and the outer peripheral wall of the rotating shaft; a connecting portion, which is passed through the connecting hole and has both ends of the connecting portion in the length direction connected to the extension portion.

[0014] According to some embodiments of the utility model, a bearing is provided between the outer peripheral wall of the rotating shaft and the inner wall of the through hole at one end away from the first connecting port, and a flange is provided on the side of the valve seat assembly away from the valve core assembly, and the flange is used to limit the movement of the bearing toward the side away from the valve core assembly.

[0015] According to some embodiments of the utility model, a guide member is provided between the flange and the bearing along the axial direction of the valve seat assembly, and a side of the guide member away from the bearing abuts against a side of the flange facing the bearing.

[0016] According to some embodiments of the utility model, the rotating shaft and the valve core assembly are threadedly connected, one of the valve seat assembly and the valve core assembly is provided with a limiting groove, and the other is provided with a limiting member that cooperates with the limiting groove.

[0017] According to some embodiments of the utility model, the control valve further includes: a guide bracket, the guide bracket is located on a side of the rotor away from the valve core assembly, the guide bracket has a rotation hole, and an end of the rotation shaft facing away from the valve core assembly is rotatably disposed in the rotation hole.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a cross-sectional view of a control valve according to a first embodiment of the utility model;

[0021] Figure 2 is a cross-sectional view of a control valve according to a second embodiment of the utility model;

[0022] Figure 3 It is a schematic structural diagram of an angle of cooperation between the rotor and the rotating shaft according to the first embodiment of the utility model;

[0023] Figure 4 is a cross-sectional view of the rotor and the rotating shaft according to the first embodiment of the utility model;

[0024] Figure 5 is a schematic structural diagram of another angle of cooperation between the rotor and the rotating shaft according to the first embodiment of the utility model;

[0025] Figure 6It is a structural schematic diagram of another angle of cooperation between the rotor and the rotating shaft according to the first embodiment of the utility model;

[0026] Figure 7 It is a structural schematic diagram of a valve core assembly according to a first embodiment of the utility model at an angle;

[0027] Figure 8 is a structural schematic diagram of the valve core assembly according to the first embodiment of the utility model from another angle;

[0028] Fig. 9 is a cross-sectional view of a valve core assembly according to a first embodiment of the utility model;

[0029] Fig.10 is a schematic structural diagram of a valve needle at one angle according to the first embodiment of the utility model;

[0030] Fig.11 is a schematic structural diagram of the valve needle according to the first embodiment of the utility model at another angle;

[0031] Fig.12 is a cross-sectional view of a valve needle according to a first embodiment of the utility model;

[0032] Fig.13 is a schematic structural diagram of a connecting rod according to a first embodiment of the utility model;

[0033] Fig.14 is a cross-sectional view of a connecting rod according to a first embodiment of the utility model;

[0034] Fig.15 is a schematic structural diagram of a pressure ring according to a first embodiment of the utility model;

[0035] Fig.16 is a cross-sectional view of a pressure ring according to a first embodiment of the utility model;

[0036] Fig.17 is a schematic structural diagram of a position limiting member according to a first embodiment of the utility model;

[0037] Fig.18 It is a structural schematic diagram of the upper valve seat according to the first embodiment of the utility model;

[0038] Fig.19 is a schematic structural diagram of a guide bracket according to a first embodiment of the utility model;

[0039] Fig. 20 is a schematic structural diagram of a bushing according to a first embodiment of the utility model;

[0040] Fig.21 This is a schematic structural diagram of an angle of the lower valve seat according to the first embodiment of the utility model;

[0041] Fig. 22 is a structural schematic diagram of the lower valve seat according to another angle of the first embodiment of the utility model;

[0042] Fig.23 is a cross-sectional view of a lower valve seat according to a first embodiment of the utility model;

[0043] Fig.24 It is a structural schematic diagram of an angle of cooperation between the lower valve seat and the valve core assembly according to the third embodiment of the utility model;

[0044] Fig.25 It is an exploded view of the cooperation between the lower valve seat and the valve core assembly according to the third embodiment of the utility model;

[0045] Fig.26 It is a structural schematic diagram of another angle of cooperation between the lower valve seat and the valve core assembly according to the third embodiment of the utility model;

[0046] Fig. 27 is a cross-sectional view of the cooperation between the lower valve seat and the valve core assembly according to the third embodiment of the utility model;

[0047] Fig.28 is a schematic structural diagram of a lower valve seat according to a third embodiment of the utility model;

[0048] Fig.29 is a schematic structural diagram of a sealing member according to a third embodiment of the utility model;

[0049] Fig.30 is a schematic structural diagram of a stop member according to a third embodiment of the utility model;

[0050] Fig.31 is a cross-sectional view of a control valve according to a fourth embodiment of the utility model;

[0051] Fig.32 It is a schematic structural diagram of an angle of cooperation between the rotor and the rotating shaft according to the fourth embodiment of the utility model;

[0052] Fig.33 is a cross-sectional view of the rotor and the rotating shaft according to the fourth embodiment of the utility model;

[0053] Fig.34 is a schematic structural diagram of another angle of cooperation between the rotor and the rotating shaft according to the fourth embodiment of the utility model;

[0054] Fig.35 is a schematic structural diagram of a guide member according to a fourth embodiment of the utility model at an angle;

[0055] Fig.36is a cross-sectional view of a guide member according to a fourth embodiment of the utility model;

[0056] Fig.37 It is a schematic structural diagram of the guide member according to the fourth embodiment of the utility model from another angle.

[0057] Reference numerals:

[0058] 100. Control valve;

[0059] 10. Shell; 11. Valve seat assembly; 12. First cavity; 13. Second cavity; 14. Groove; 15. Valve block; 16. Connector; 17. Sleeve; 111. Through hole; 112. Flanging; 113. Raised portion; 114. Limiting groove; 115. Upper valve seat; 116. Lower valve seat; 151. First interface; 152. Second interface;

[0060] 20, valve core assembly; 21, connecting rod; 22, valve needle; 23, stopper; 24, pressure ring; 211, matching part; 212, rotating part; 213, first arc surface; 214, third arc surface; 215, second balancing hole; 221, mounting groove; 222, second arc surface; 223, mounting hole; 224, first balancing flow channel; 241, fourth arc surface;

[0061] 30. driving assembly; 31. rotor; 32. rotating shaft; 311. first matching portion; 312. second balancing flow channel; 321. second matching portion;

[0062] 41. extension portion; 42. connection portion; 411. first balancing hole;

[0063] 50. Bearings;

[0064] 60. Guide member; 61. Avoidance groove; 62. Third balancing hole;

[0065] 71. First communication port; 72. Second communication port;

[0066] 80. Guide bracket; 81. Rotation hole; 82. Bushing;

[0067] 91. Sealing member; 92. Stop member; 93. Sealing assembly; 94. Internal sealing member; 95. External sealing member. DETAILED DESCRIPTION

[0068] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0071] The control valve 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0072] Reference Figure 1 , Figure 2 and Fig.31 As shown, the control valve 100 according to the embodiment of the present invention may include: a valve seat assembly 11 .

[0073] Specifically, the valve seat assembly 11 has a through hole 111, and the through hole 111 is along the axial direction of the valve seat assembly 11 (for example Figure 1 The through hole 111 extends in the up and down directions shown in the figure, one end of the through hole 111 is formed as a first connecting port 71, and a second connecting port 72 is provided on the peripheral wall of the valve seat assembly 11. The second connecting port 72 is connected to the through hole 111, so that the first connecting port 71 can be connected to the second connecting port 72 through the through hole 111, so that the medium (such as carbon dioxide refrigerant) can flow between the first connecting port 71 and the second connecting port 72 to meet the required circulation requirements.

[0074] In addition, if Figure 1 , Figure 2 , Fig.23 , Fig. 27 and Fig.31 As shown, the control valve 100 includes a valve core assembly 20 and a drive assembly 30. The drive assembly 30 is disposed on a side of the second communication port 72 away from the first communication port 71 (eg Figure 1The valve core assembly 20 is movably arranged in the through hole 111 along the axial direction of the valve seat assembly 11, and the drive assembly 30 is connected to the valve core assembly 20, so that the drive assembly 30 can drive the valve core assembly 20 to move along the axial direction of the valve seat assembly 11. An annular protrusion 113 is provided on the wall of the through hole 111, and the protrusion 113 is located on the side of the second communication port 72 close to the first communication port 71 (for example Figure 1 ), the drive assembly 30 can drive the outer peripheral wall of the valve core assembly 20 to abut against the raised portion 113, so that the first connecting port 71 and the second connecting port 72 are disconnected, thereby realizing a hard seal between the valve core assembly 20 and the through hole 111, and when the outer peripheral wall of the valve core assembly 20 does not abut against the raised portion 113, the first connecting port 71 and the second connecting port 72 are connected, thereby meeting the control requirements of the control valve 100.

[0075] At the same time, if Fig.25 , Fig. 27 and Fig.31 As shown, the control valve 100 further includes a sealing member 91, which is formed in an annular shape and is located in the through hole 111. The sealing member 91 is disposed on one side of the protrusion 113 close to the first communication port 71 (eg Fig.31 ), the sealing member 91 can seal the through hole 111 and the first connecting port 71, thereby realizing a soft seal between the valve core assembly 20 and the through hole 111. The medium can reduce pressure after flowing through the protrusion 113, and the low-pressure medium is easy to seal at the sealing member 91, thereby ensuring the sealing performance and the low internal leakage performance of the control valve 100. Furthermore, the deformation of the sealing member 91 can ensure that the valve core assembly 20 is in full contact with the protrusion 113 to form a corresponding sealing surface, thereby ensuring a reliable seal.

[0076] Thus, the valve core assembly 20 realizes double sealing by cooperating with the protrusion 113 and the sealing member 91, that is, the valve core assembly 20 realizes the combination of soft sealing and hard sealing with the through hole 111, avoiding the problems of high precision requirements and complex structure caused by only using the protrusion 113 to realize sealing, thereby reducing the production cost of the control valve 100, and avoiding the problems of creep of the sealing member 91 after multiple valve closings when only using the sealing member 91, which can reduce the requirements of the sealing member 91 under small deformation, and is conducive to improving the performance of the control valve 100. At the same time, the control valve 100 has a simple structure and efficient control, and can meet the control requirements of different media. For example, the control valve 100 can meet the sealing requirements of carbon dioxide refrigerant.

[0077] In some embodiments, the required sealing requirements can be met by controlling the size, shape, and position accuracy of the valve 100 core assembly and the protrusion 113 to ensure reliable sealing.

[0078] It should be noted that, for the convenience of description, the directions such as “upper” and “lower” in the present invention are based on the directions shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0079] In some embodiments, Figure 1 , Figure 2 , Figure 21-Figure 28 , Fig.31 As shown, there may be multiple (greater than or equal to two) second communication ports 72 , which are spaced apart along the axial direction of the valve seat assembly 11 . The multiple second communication ports 72 can meet the demand for medium flow and ensure smoother medium flow.

[0080] In some embodiments, the control valve 100 may be an expansion valve, which can control the flow of the refrigerant to meet the required use requirements. For example, the expansion valve may be an electronic expansion valve.

[0081] According to the control valve 100 of the embodiment of the utility model, an annular protrusion 113 is provided on the hole wall of the through hole 111 of the valve seat assembly 11, the protrusion 113 is located on the side of the second communication port 72 close to the first communication port 71, the outer peripheral wall of the valve core assembly 20 is suitable for abutting against the protrusion 113, the sealing member 91 is formed in an annular shape, the sealing member 91 is located in the through hole 111 and is provided on the side of the protrusion 113 close to the first communication port 71, and the sealing member 91 is used for the through hole 111 and the first communication port 71 The seal enables the valve core assembly 20 to achieve double sealing through the cooperation with the protrusion 113 and the sealing member 91, thereby avoiding the problems of high precision requirements and complex structure caused by only using the protrusion 113 to achieve sealing, thereby reducing the production cost of the control valve 100, and avoiding the problems of creep of the sealing member 91 after multiple valve closings caused by only using the sealing member 91, and reducing the requirement for the sealing member 91 to meet the requirements under relatively small deformation, which is beneficial to improving the performance of the control valve 100 and ensuring the low internal leakage performance of the control valve 100.

[0082] According to some embodiments of the present invention, Fig. 27 As shown, one end of the valve core assembly 20 away from the driving assembly 30 abuts against the sealing member 91. The cooperation between the valve core assembly 20 and the sealing member 91 can achieve sealing between the through hole 111 and the first connecting port 71, thereby ensuring reliable sealing, effectively preventing medium leakage, and improving the sealing performance of the control valve 100.

[0083] In some embodiments, one end of the valve core assembly 20 away from the driving assembly 30 is inserted into the sealing member 91, and the outer peripheral wall of the valve core assembly 20 and the inner peripheral wall of the sealing member 91 are sealed. Through the cooperation between the valve core assembly 20 and the sealing member 91, the sealing between the through hole 111 and the first connecting port 71 can be achieved, thereby ensuring reliable sealing, effectively preventing medium leakage, and improving the sealing performance of the control valve 100.

[0084] In some embodiments of the present invention, Fig.25 , Fig.30 and Fig.31 As shown, the control valve 100 further includes a stop member 92, which is located on a side of the sealing member 91 away from the drive assembly 30 (eg Fig.31 The stop member 92 is fixed on the valve seat assembly 11, and the sealing member 91 is supported on the stop member 92, so that the stop member 92 can provide stable support for the sealing member 91 to prevent the sealing member 91 from shifting when under pressure, thereby ensuring the durability of the sealing effect, and the stop member 92 can limit the movement range of the valve core assembly 20 to prevent the valve core assembly 20 from excessive movement and easily causing damage to the sealing member 91, thereby extending the service life.

[0085] In some embodiments, Fig.23 and Fig. 27 As shown, one end of the valve seat assembly 11 having the first connecting port 71 is provided with a groove 14, and a through hole 111 penetrates through the bottom wall of the groove 14, a stop member 92 is fixed in the groove 14, a sealing member 91 is located between the stop member 92 and the bottom wall of the groove 14, and the sealing member 91 is against the bottom wall of the groove 14, and the groove 14 can provide installation space for the stop member 92 and the sealing member 91, and can make the stop member 92 and the sealing member 91 more firmly installed on the valve seat assembly 11, and the bottom wall of the groove 14 can limit the sealing member 91 to prevent the sealing member 91 from shifting, thereby preventing loosening or shifting due to vibration or impact, and ensuring the sealing performance of the control valve 100.

[0086] In some embodiments, the stop portion can be fixed with the groove wall of the groove 14 by interference fit, or the stop portion can be fixed with the valve seat assembly 11 by welding, both of which can ensure that the stop portion is fixed reliably.

[0087] According to some embodiments of the present invention, Figure 7-Figure 12 , Figure 24-Figure 27 As shown, the valve core assembly 20 includes a connecting rod 21 and a valve needle 22, and the drive assembly 30 is connected to the connecting rod 21, so that the drive assembly 30 can drive the connecting rod 21 to move along the axial direction of the valve seat assembly 11, so that the connecting rod 21 can drive the valve needle 22 to move along the axial direction of the valve seat assembly 11, thereby realizing the control requirements of the control valve 100.

[0088] In addition, if Fig. 9 and Fig. 27 As shown, the valve needle 22 is connected to the end of the connecting rod 21 away from the drive assembly 30 (for example Figure 1The valve needle 22 can abut against the protrusion 113, so as to realize the disconnection requirement of the first communication port 71 and the second communication port 72.

[0089] At the same time, during the assembly of the valve core assembly 20, since the valve needle 22 is rotatably connected to the end of the connecting rod 21 away from the drive assembly 30, the angle between the connecting rod 21 and the valve needle 22 can be adjusted, so that the connecting rod 21 and the valve needle 22 can adjust their own postures according to the actual assembly situation to achieve the center cooperation of the valve needle 22 and the through hole 111, thereby realizing the design of a flexible valve core assembly 20, which can meet the required assembly requirements, avoid assembly deformation, and make the rotation smoother. During the adjustment of the valve core assembly 20, the impact on other structures is small, the adjustment resistance is small, friction can be reduced, the service life can be increased, the performance of the control valve 100 can be improved, and it is beneficial to reduce production costs.

[0090] In the embodiment of the utility model, the specific matching structure of the valve needle 22 and the end of the connecting rod 21 away from the driving assembly 30 can be set according to the actual situation. For example, there is a gap between the valve needle 22 and the end of the connecting rod 21 away from the driving assembly 30, or a ball is provided between the valve needle 22 and the end of the connecting rod 21 away from the driving assembly 30, both of which can realize the rotation of the valve needle 22 and the end of the connecting rod 21 away from the driving assembly 30, meeting the demand for flexible adjustment of the valve core assembly 20.

[0091] For example, in some embodiments, Figure 1 , Figure 2 , Figure 7-Figure 14 As shown, the connecting rod 21 includes a matching portion 211 and a rotating portion 212. One end of the matching portion 211 in the length direction (for example Fig. 9 The lower end shown in FIG. 2 is connected to the rotating portion 212, and the side of the valve needle 22 facing the connecting rod 21 (for example Fig. 9 A mounting groove 221 is provided on the upper side (as shown in the figure), and the rotating portion 212 extends into the mounting groove 221, and the rotating portion 212 is supported on the bottom wall of the mounting groove 221, so that the connection between the connecting rod 21 and the valve needle 22 can be realized, and the connecting rod 21 and the valve needle 22 can be easily processed and manufactured separately, which is beneficial to reduce the structural complexity and can reduce the production cost.

[0092] In addition, if Fig. 9 , Fig.12 , Fig.13 and Fig.14 As shown, the end of the rotating portion 212 away from the matching portion 211 (eg Fig. 9 The lower end shown in FIG. 2 is formed as a first arc surface 213 protruding toward the side away from the matching portion 211, and the bottom wall of the installation groove 221 is formed toward the side away from the connecting rod 21 (for example Fig. 9The second curved surface 222 (shown in the figure below) is concave, and the first curved surface 213 and the second curved surface 222 cooperate to achieve the angle adjustment between the connecting rod 21 and the valve needle 22, so that the connecting rod 21 and the valve needle 22 can adjust their postures according to the actual assembly situation to achieve the center cooperation of the valve needle 22 and the structure to be matched (such as the through hole 111), and realize the design of the flexible valve core assembly 20, which can meet the required assembly requirements, avoid assembly deformation, and make the rotation smoother. The valve core assembly 20 has little impact on other structures during adjustment, and the adjustment resistance is small, which can reduce friction, increase service life, and improve the performance of the control valve 100, which is conducive to reducing production costs. At the same time, while being able to achieve flexible adjustment of the valve core assembly 20, it can ensure that the structural strength of the valve core assembly 20 is high, and the valve core assembly 20 is not easily affected by the flow of high-pressure medium (such as carbon dioxide refrigerant), meeting the flow requirements of the high-pressure medium.

[0093] According to some embodiments of the present invention, Fig. 9 and Fig. 27 As shown, the radius of the first arc surface 213 is less than or equal to that of the second arc surface 222, which can make the contact between the rotating part 212 and the bottom wall of the installation groove 221 more uniform, avoid problems such as local wear, extend the service life of the valve core assembly 20, and facilitate processing and manufacturing, avoiding problems such as unreliable rotation caused by processing errors.

[0094] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 7 , Fig. 9 , Fig.24 and Fig. 27 As shown, the valve core assembly 20 also includes a pressing ring 24, which is inserted into the connecting rod 21 and fixed in the mounting groove 221. The rotating portion 212 is located between the pressing ring 24 and the bottom wall of the mounting groove 221. The pressing ring 24 can limit the rotating portion 212 to prevent the rotating portion 212 from escaping from the mounting groove 221, thereby ensuring that the connecting rod 21 and the valve needle 22 are reliably connected, so that the connecting rod 21, the valve needle 22 and the pressing ring 24 form a stable structure, which can enhance the structural stability of the valve core assembly 20.

[0095] In addition, if Fig. 9 , Figure 13-Figure 16 As shown, one end of the rotating portion 212 close to the matching portion 211 (eg Fig. 9 The upper end shown in FIG. 2 is formed into a third arc-shaped surface 214 protruding toward the side close to the matching portion 211, and the side of the pressure ring 24 facing the rotating portion 212 (for example Fig. 9 ) is formed to face the side away from the rotating portion 212 (eg, the lower side shown in FIG. 2 ). Fig. 9The fourth arc surface 241 (the upper side shown in the figure) is recessed. The third arc surface 214 and the fourth arc surface 241 cooperate with each other to facilitate the angle adjustment of the rotating part 212 relative to the pressure ring 24, so that the rotation is smoother. The valve core assembly 20 has less impact on other structures during adjustment, and the adjustment resistance is small, which can reduce friction, increase service life, enhance the performance of the control valve 100, and help reduce production costs.

[0096] At the same time, through the cooperation of the first curved surface 213 and the second curved surface 222, and the cooperation of the third curved surface 214 and the fourth curved surface 241, the valve core assembly 20 can be formed into a structure similar to a universal joint, which facilitates the valve needle 22 to swing freely within a certain range. During the assembly of the valve core assembly 20, when the valve needle 22 deviates from the structure to be matched, the valve needle 22 can freely adjust its posture, thereby improving the matching of the valve needle 22 and improving the performance of the control valve 100.

[0097] In some embodiments, the pressing ring 24 is interference fit with the groove side wall of the installation groove 221 to ensure that the pressing ring 24 is securely fixed in the installation groove 221, thereby ensuring reliable positioning of the rotating part 212 and facilitating assembly.

[0098] In some embodiments, the third arc surface 214 is less than or equal to the radius of the fourth arc surface 241, which can make the contact between the rotating part 212 and the pressure ring 24 more uniform, avoid problems such as local wear, extend the service life of the valve core assembly 20, and facilitate processing and manufacturing, avoiding problems such as unreliable rotation caused by processing errors.

[0099] According to some embodiments of the present invention, Figure 1-Figure 6 , Figure 31-Figure 34 As shown, the driving assembly 30 also includes a rotor 31, which is sleeved on a rotating shaft 32. Therefore, when the rotor 31 rotates, the rotor 31 can drive the rotating shaft 32 to rotate, so that the rotating shaft 32 can drive the valve core assembly 20 to move along the axial direction of the valve seat assembly 11, thereby realizing the control requirements of the control valve 100.

[0100] In the related art, the rotor and the rotating shaft are connected by welding. However, a large amount of heat is generated during the welding process, which causes problems such as deformation of the rotor and the rotating shaft, resulting in large self-jump of the rotating shaft and the rotor, affecting the normal use of the control valve, and the assembly takes a long time. In order to solve the problem of deformation during the fixing process of the rotor and the rotating shaft, in the utility model, the rotor 31 and the rotating shaft 32 are integrated, which is simple to manufacture and ensures high connection strength. It can avoid problems such as deformation caused by welding connection, and reduces the assembly process, which is conducive to improving production efficiency.

[0101] In addition, if Figure 1 , Figure 2 , Figure 4 , Fig.31 and Fig.33 As shown, the rotor 31 is provided with a first matching portion 311, and the rotating shaft 32 is provided with a second matching portion 321, so that the second matching portion 321 cooperates with the first matching portion 311 to limit the relative rotation of the rotor 31 and the rotating shaft 32, and avoid slipping at the connection between the rotating shaft 32 and the rotor 31, thereby preventing the relative rotation of the rotor 31 and the rotating shaft 32 caused by sliding, ensuring that the rotating shaft 32 and the rotor 31 are reliably connected, avoiding the rotor 31 from jumping relative to the rotating shaft 32, and ensuring the accuracy and stability of the movement. At the same time, the problem of material waste caused by increasing the use of materials in the related art to overcome the relative rotation of the rotor and the rotating shaft is avoided, and the weight of the rotating shaft 32 and the rotor 31 can be reduced, which is conducive to lightweighting.

[0102] In the embodiment of the present invention, the specific structures of the first matching portion 311 and the second matching portion 321 can be set according to actual conditions. For example, the second matching portion 321 can be formed as a knurling, a thread, etc. set on the outer peripheral wall of the rotating shaft 32.

[0103] For example, in some embodiments, Figure 4 and Fig.33 As shown, the second matching portion 321 is formed as a connecting hole extending in the radial direction of the rotating shaft 32, and the first matching portion 311 is inserted into the connecting hole, which can realize the fixed connection between the rotating shaft 32 and the rotor 31, effectively prevent the relative rotation between the rotor 31 and the rotating shaft 32, and ensure the compact structure. The second matching portion 321 has a simple structure and is easy to process and manufacture, which is conducive to reducing production costs.

[0104] In some embodiments, the rotor 31 and the rotating shaft 32 are made of the same material and are integrally injection molded, which can ensure a close connection between the rotor 31 and the rotating shaft 32, improve the structural strength and stability of the rotor 31 and the rotating shaft 32, improve production efficiency, and achieve complex shape structures to meet the required design requirements.

[0105] In some embodiments, the rotor 31 and the rotating shaft 32 are both inserts, and the first mating portion 311 is injection molded to ensure that the rotor 31 and the rotating shaft 32 are reliably connected and can meet the structural integrity requirements of the rotor 31 and the rotating shaft 32, thereby ensuring the structural accuracy of the rotor 31 and the rotating shaft 32.

[0106] According to some embodiments of the present invention, Figure 4-Figure 6 , Fig.33 and Fig.34As shown, the first matching portion 311 may include an extension portion 41 and a connection portion 42, wherein the extension portion 41 is located on the radial inner side of the rotor 31, and the extension portion 41 is connected to the radial inner side of the rotor 31 and the outer peripheral wall of the rotating shaft 32, and the extension portion 41 can ensure that the rotor 31 and the rotating shaft 32 are reliably connected, thereby improving the connection strength. In addition, the connection portion 42 is inserted into the connection hole, and both ends of the connection portion 42 in the length direction are connected to the extension portion 41, which can limit the relative rotation of the rotor 31 and the rotating shaft 32, avoid slipping at the connection between the rotating shaft 32 and the rotor 31, ensure that the rotating shaft 32 and the rotor 31 are reliably connected, avoid the rotor 31 from jumping relative to the rotating shaft 32, and ensure the accuracy and stability of the movement.

[0107] In some embodiments of the present invention, the extension portion 41 may include a plurality of (greater than or equal to two) sub-extension portions, and the plurality of sub-extension portions are arranged at intervals along the circumferential direction of the rotor 31; or Figure 5 , Figure 6 and Fig.34 As shown, the extension portion 41 can be formed into a ring shape extending along the circumferential direction of the rotor 31, which can effectively enhance the connection stability between the rotor 31 and the rotating shaft 32 and meet different usage requirements.

[0108] According to some embodiments of the present invention, there may be a plurality of first matching portions 311 (greater than or equal to two), and the plurality of first matching portions 311 are arranged along the axial direction of the rotor 31 (for example, Figure 1 The second matching parts 321 are arranged at intervals (in the upper and lower directions shown in the figure), and there are multiple second matching parts 321 corresponding to the first matching parts 311 one by one. Through the matching of multiple first matching parts 311 and multiple second matching parts 321, the connection stability between the rotor 31 and the rotating shaft 32 can be further improved, and the relative rotation between the rotor 31 and the rotating shaft 32 can be effectively limited, thereby ensuring the stable operation of the control valve 100.

[0109] In some embodiments of the present invention, the rotor 31 is connected to the rotating shaft 32 by a fastener, so that the rotor 31 and the rotating shaft 32 can be connected by integral molding and mechanical fixation, ensuring a reliable connection and effectively preventing problems such as loosening or falling off during operation. For example, the fastener can be a rivet or the like.

[0110] In some embodiments, the rotating shaft 32 has a fixing hole, and a fastener can be passed through the rotor 31 and connected to the fixing hole. The fastener can be used to connect the rotating shaft 32 and the rotor 31 to ensure a reliable connection.

[0111] According to some embodiments of the present invention, Figure 1 , Figure 2 , Figure 21-Figure 27 , Fig.31As shown, a bearing 50 is provided between the outer peripheral wall of the rotating shaft 32 and the inner wall of the through hole 111 . The bearing 50 can ensure the normal rotation of the rotating shaft 32 , reduce the friction resistance, and help to improve the rotation flexibility of the rotating shaft 32 .

[0112] In the related art, the axial position of the bearing is limited by a retaining ring, but the bearing still has a large axial movement, affecting the performance of the control valve; or, the bearing is fixed to the valve seat assembly by welding, but the thermal deformation caused by welding will affect the performance of the control valve.

[0113] Therefore, in the present utility model, if Figure 1 , Figure 2 , Fig.18 and Fig.31 As shown, the side of the valve seat assembly 11 away from the valve core assembly 20 (eg Figure 1 The upper side (as shown in the figure) is provided with a flange 112, which can limit the bearing 50 to move toward the side away from the valve core assembly 20, ensuring reliable positioning of the bearing 50 and avoiding axial movement of the bearing 50. The process of the flange 112 is simple and reliable, avoiding the influence of thermal deformation caused by the welding connection of the bearing 50, and better ensuring the processing accuracy of the structure and ensuring the performance of the control valve 100.

[0114] In some embodiments of the present invention, Fig.18 As shown, there are multiple flanges 112, and the multiple flanges 112 are arranged at intervals along the circumferential direction of the valve seat assembly 11. The multiple flanges 112 can be used to limit the circumferential direction of the bearing 50, thereby ensuring that the limiting of the bearing 50 is reliable, which is beneficial to improving the stability of the bearing 50.

[0115] In the embodiment of the present invention, the number of the flanges 112 can be flexibly set according to actual conditions. For example, the flanges 112 can be Fig.18 Four are shown, but there may be two, three, five, six or more, all of which are within the protection scope of the present utility model.

[0116] According to some embodiments of the present invention, Figure 1 , Figure 2 and Fig.31 As shown, along the axial direction of the valve seat assembly 11, a guide member 60 is provided between the flange 112 and the bearing 50. The guide member 60 can provide support and guidance for the rotating shaft 32 to ensure that the rotating shaft 32 remains stable during rotation, and the guide member 60 and the bearing 50 can simultaneously ensure the coaxiality of the rotating shaft 32 to prevent the rotating shaft 32 from deflecting or shaking.

[0117] In addition, if Figure 1 , Figure 2 and Fig.31As shown, the side of the guide member 60 away from the bearing 50 (eg Figure 1 ) and the side of the flange 112 facing the bearing 50 (eg Figure 1 The guide member 60 is offset against the lower side shown in the figure, and the flange 112 can be used to limit the position of the guide member 60, so that the bearing 50 can be limited to move toward the side away from the valve core assembly 20, ensuring that the bearing 50 is limited reliably and avoiding axial movement of the bearing 50.

[0118] In some embodiments, the guide member 60 is welded to the valve seat assembly 11 to ensure that the guide member 60 and the valve seat assembly 11 are reliably fixed, thereby ensuring reliable positioning of the bearing 50, avoiding axial movement of the bearing 50, and reducing production costs.

[0119] In some embodiments, the outer peripheral wall of the guide member 60 is interference fit with the hole wall of the through hole 111 to ensure that the guide member 60 is securely fixed on the valve seat assembly 11, thereby ensuring reliable positioning of the bearing 50 and preventing axial movement of the bearing 50.

[0120] In some embodiments, the guide member 60 may be a bearing, which has good guiding performance, can improve transmission accuracy, and can reduce design costs. For example, the bearing may be a sliding bearing or a guide bearing.

[0121] In some embodiments, when the control valve 100 is assembled, the flange 112 extends along the axial direction of the rotating shaft 32. After the bearing 50 is installed, the flange 112 is bent so that the side of the flange 112 facing the bearing 50 is abutted against the side of the guide member 60 away from the bearing 50, which facilitates assembly and avoids problems such as welding deformation.

[0122] In some embodiments, when the control valve 100 is assembled, after the bearing 50 is installed, the flange 112 can be connected to the side of the valve seat assembly 11 away from the valve core assembly 20 by riveting, so that the side of the flange 112 facing the bearing 50 is abutted against the side of the guide member 60 away from the bearing 50, which facilitates assembly and can avoid problems such as welding deformation.

[0123] In some embodiments of the present invention, Fig.31 As shown, the length of the guide member 60 along the axial direction of the valve seat assembly 11 is greater than or equal to the diameter of the portion where the rotating shaft 32 cooperates with the guide member 60, which further enhances the support and guiding function of the guide member 60 and can increase the support length of the rotating shaft 32, making the rotating shaft 32 more stable and reliable during rotation, thereby ensuring the reliable performance of the control valve 100 and helping to reduce production costs.

[0124] In some embodiments, Fig.31 , Figure 35-Figure 37As shown, the outer peripheral wall of the guide member 60 is provided with an escape groove 61, the flange 112 extends into the escape groove 61, and the flange 112 and the groove side wall of the escape groove 61 close to the valve core assembly 20 (for example Fig.31 The flange 112 is avoided by the avoidance groove 61, so that the flange 112 cooperates with the guide member 60 to limit the bearing 50 and prevent the bearing 50 from moving toward the side away from the valve core assembly 20. The structure is simple and easy to process and manufacture.

[0125] In some embodiments, an abutment portion is provided on the outer peripheral wall of the guide member 60, and the abutment portion extends along the circumferential direction of the guide member 60. A flange 112 is provided on the side of the valve seat assembly 11 away from the valve core assembly 20. The abutment portion is located on the side of the flange 112 close to the valve core assembly 20, and the abutment portion abuts against the side of the flange 112 close to the valve core assembly 20. The flange 112 cooperates with the guide member 60 to limit the bearing 50 to move toward the side away from the valve core assembly 20, thereby ensuring that the bearing 50 is limited reliably and avoiding axial movement of the bearing 50. The structure is simple and easy to process and manufacture.

[0126] In some embodiments where the flange 112 is multiple, the avoidance groove 61 can be formed into multiple corresponding to the multiple flanges 112, or the avoidance groove 61 can be formed as follows: Fig.35 The ring-shaped portions extending along the circumferential direction of the guide member 60 shown in the figure can avoid the flange 112 and ensure reliable cooperation between the flange 112 and the guide member 60.

[0127] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 7-Figure 9 , Fig.13 , Fig.14 , Figure 24-Figure 27 As shown, the rotating shaft 32 and the valve core assembly 20 are threadedly connected, a limiting groove 114 is provided on the valve seat assembly 11, and the valve core assembly 20 is provided with a limiting member 23. The limiting member 23 cooperates with the limiting groove 114 to limit the limiting member 23. When the rotating shaft 32 rotates, the valve core assembly 20 can prevent the valve core assembly 20 from rotating under the limiting action of the limiting groove 114, thereby realizing the axial movement of the valve needle 22 assembly along the rotating shaft 32, ensuring reliable movement, thereby realizing the control requirements of the control valve 100.

[0128] Of course, the valve core assembly 20 may be provided with a limiting groove 114 , and the valve seat assembly 11 may be provided with a limiting member 23 that cooperates with the limiting groove 114 , which is also within the protection scope of the present utility model.

[0129] In some embodiments, Figure 1 , Figure 2 , Figure 7-Figure 9 , Fig.13 , Fig.14 , Figure 24-Figure 27 As shown, the valve core assembly 20 is provided with an external thread, and the rotating shaft 32 is provided with an internal thread. The valve core assembly 20 and the rotating shaft 32 can be connected by the cooperation of the external thread and the internal thread, and under the limiting action of the limiting member 23 and the limiting groove 114, the valve needle 22 assembly can be moved along the axial direction of the rotating shaft 32, thereby realizing the control requirements of the control valve 100.

[0130] In some embodiments, the valve core assembly 20 includes a connecting rod 21 and a valve needle 22, such as Figure 7-Figure 17 As shown, a mounting hole 223 is provided on the peripheral wall of the valve needle 22, and the valve core assembly 20 further includes a stopper 23, which is passed through the mounting hole 223 and connected to the rotating part 212, so that the stopper 23 and the rotating part 212 can be connected, which is beneficial to improving the structural strength of the valve core assembly 20. For example, the stopper 23 can be a pin.

[0131] In addition, if Figure 1 , Figure 2 , Fig. 9 and Fig. 27 As shown, at least one end of the limit member 23 in the length direction protrudes from the outer peripheral wall of the valve needle 22, and the limit member 23 cooperates with the limit groove 114 to limit the limit member 23, thereby preventing the valve core assembly 20 from rotating when the rotating shaft 32 rotates, and realizing the axial movement of the valve needle 22 assembly along the rotating shaft 32, ensuring reliable movement, and the structure of the valve core assembly 20 is simple and easy to process and manufacture.

[0132] At the same time, if Figure 7-Figure 9 , Fig. 27 As shown, the diameter of the mounting hole 223 is larger than the radial dimension of the outer peripheral wall of the portion of the limiting member 23 located at the mounting hole 223, which facilitates the relative rotation of the connecting rod 21 and the valve needle 22, avoids interference and other problems, and ensures reliable rotation.

[0133] In some embodiments, the limit member 23 can pass through the rotating part 212 and the valve needle 22, which makes assembly convenient and is beneficial to improving the structural strength. Both ends of the limit member 23 in the length direction protrude from the outer peripheral wall of the valve needle 22, and the valve seat assembly 11 is provided with two limit grooves 114 that respectively cooperate with the two ends of the length direction of the limit member 23. Through the cooperation between the two limit members 23 and the two limit grooves 114, the limit can be ensured to be reliable, and the two ends of the limit member 23 are evenly stressed to avoid deformation, which is beneficial to extending the service life.

[0134] According to some embodiments of the present invention, Figure 1 , Figure 2 and Fig.19As shown, the control valve 100 further includes a guide bracket 80, which is located on a side of the rotor 31 away from the valve core assembly 20 (eg Figure 1 The guide bracket 80 has a rotation hole 81, and the end of the rotating shaft 32 that faces away from the valve core assembly 20 is rotatably disposed in the rotation hole 81. The guide bracket 80 can support and guide the rotating shaft 32 to ensure the rotation stability of the rotating shaft 32 and prevent deviation or shaking during rotation.

[0135] In some embodiments, a bearing 50 is provided between the outer peripheral wall of the rotating shaft 32 and the inner wall of the through hole 111, such as Figure 1 and Figure 2 As shown, the two ends of the rotating shaft 32 in the axial direction can be supported and guided by the guide bracket 80 and the bearing 50 respectively, so as to avoid problems such as large vibration at the two ends of the rotating shaft 32 in the axial direction, avoid interference between the rotating shaft 32 and other structures, and ensure the performance of the control valve 100.

[0136] In some embodiments of the present invention, the guide bracket 80 may be a metal part, which can improve the structural strength of the guide bracket 80, avoid deformation and other problems, and ensure reliable guidance and support of the rotating shaft 32. For example, the guide bracket 80 may be an aluminum stamping part, which is cheap and can reduce production costs.

[0137] According to some embodiments of the present invention, Figure 2 and Fig. 20 As shown, a bushing 82 is provided between the inner wall of the rotating hole 81 and the outer peripheral wall of the rotating shaft 32. The bushing 82 can reduce the friction between the rotating hole 81 and the rotating shaft 32. The bushing 82 has good guiding and lubricating properties, which can improve the rotation flexibility and service life of the rotating shaft 32. While supporting the rotating shaft 32, the smoothness of the movement of the rotating shaft 32 can be ensured, and the processing accuracy of the guide bracket 80 can be reduced, thereby reducing the production cost. For example, the bushing 82 can be a bearing or the like.

[0138] In some embodiments, the bushing 82 can be installed on the guide bracket 80 by being pressed in, which can achieve the fixation of the bushing 82, ensure reliable fixation, and facilitate assembly.

[0139] In some embodiments, Figure 1 , Figure 2 , Fig.18 , Figure 21-Figure 28 , Fig.31As shown, the valve seat assembly 11 includes an upper valve seat 115 and a lower valve seat 116, which are arranged and connected along the axial direction of the rotating shaft 32 to form the valve seat assembly 11. The through hole 111 penetrates the upper valve seat 115 and the lower valve seat 116, and the first communication port 71 and the second communication port 72 are both located on the lower valve seat 116, the protrusion 113 is provided on the lower valve seat 116, and the flange 112 is located on the side of the upper valve seat 115 away from the valve core assembly 20, which is convenient for processing and manufacturing the valve seat assembly 11, which is conducive to reducing the complexity of the structure and can reduce the production cost.

[0140] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, the control valve 100 includes a housing 10, the housing 10 includes a housing body and a valve seat assembly 11, and the drive assembly 30 also includes a stator, which is embedded in the housing body and arranged around a rotor 31. When a current with a certain regular change is passed through the stator, an excitation magnetic field can be formed at the stator, so that the rotor 31 rotates in the housing 10, meeting the required driving requirements.

[0141] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, the housing 10 includes a valve block 15, and the valve seat assembly 11 is arranged in the valve block 15. The valve block 15 can protect the valve seat assembly 11 to prevent the valve seat assembly 11 from being exposed and damaged, thereby extending the service life of the control valve 100. In addition, the valve block 15 is provided with a first interface 151 and a second interface 152. The first interface 151 is communicated with the first communication port 71, and the second interface 152 is communicated with the second communication port 72, so that the medium can flow from the first interface 151 through the first communication port 71 into the through hole 111, and flow out through the second flow port and the second interface 152; or the medium can flow from the second interface 152 through the second communication port 72 into the through hole 111, and flow out through the first flow port and the first interface 151, which can meet the required medium flow requirements and facilitate the connection of the control valve 100 with the external structure.

[0142] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, the housing 10 includes a sleeve 17, and the rotor 31 and the rotating shaft 32 are located in the sleeve 17. The sleeve 17 can protect the rotor 31 and the rotating shaft 32 to prevent the rotor 31 and the rotating shaft 32 from being exposed and damaged, thereby extending the service life of the control valve 100.

[0143] In addition, if Figure 1 , Figure 2 and Fig.31As shown, the control valve 100 includes a connector 16, the inner wall of the connector 16 is connected to the sleeve 17 and the upper valve body, and the outer wall of the connector 16 is connected to the valve block 15, which can realize the connection between the sleeve 17, the valve seat assembly 11 and the valve block 15, ensure that the structural connection is reliable and compact, and meet the required fixing requirements. For example, the connector 16 can be a fixing nut.

[0144] In some embodiments where the control valve 100 includes the guide bracket 80 , the guide bracket 80 is interference-fitted with the sleeve 17 , thereby ensuring that the guide bracket 80 is securely fixed to the housing 10 and facilitating assembly.

[0145] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, an internal seal 94 is provided between the lower valve body and the valve block 15, and the internal seal 94 is located on the side of the second interface 152 close to the first interface 151. The internal seal 94 can achieve sealing between the lower valve body and the valve block 15, preventing the medium from flowing out through the gap between the lower valve body and the valve block 15, thereby ensuring reliable sealing.

[0146] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, a sealing assembly 93 is provided between the lower valve body and the valve core assembly 20. The sealing assembly 93 is located on the side of the second connecting port 72 away from the first connecting port 71. The sealing between the lower valve body and the valve core assembly 20 can be achieved through the internal sealing member 94 to prevent the medium from flowing out through the gap between the lower valve body and the valve core assembly 20, thereby ensuring reliable sealing.

[0147] In some embodiments, the sealing assembly 93 includes a sealing ring and a sealing ring, the sealing ring is located on the annular inner side of the sealing ring, and the valve core assembly 20 is penetrated through the annular inner side of the sealing ring. The sealing ring and the sealing ring can ensure reliable sealing between the lower valve body and the valve core assembly 20, and the structure is simple, which is convenient for processing and manufacturing.

[0148] In some embodiments, Figure 1 , Figure 2 and Fig.31 As shown, an external seal 95 is provided between the sleeve 17 and the housing 10. The external seal 95 can achieve sealing between the sleeve 17 and the housing 10, preventing external impurities from entering the control valve 100 through the gap between the sleeve 17 and the housing 10, ensuring reliable sealing, and helping to extend the service life of the control valve 100.

[0149] In some embodiments, Figure 1 , Figure 2 and Fig.31As shown, the shell 10 has a first cavity 12 and a second cavity 13 arranged and connected along the axial direction of the shell 10, the rotor 31 is rotatably disposed in the first cavity 12, the valve core assembly 20 is disposed in the second cavity 13, and the rotating shaft 32 is penetrated in the first cavity 12 and the second cavity 13, so that the rotor 31, the rotating shaft 32 and the valve core assembly 20 are conveniently placed in the shell 10, and the second cavity 13 is connected with the external environment, so that the first cavity 12 can be connected with the external environment, and the pressure balance between the first cavity 12 and the second cavity 13 and the external environment is achieved, ensuring the air pressure balance, being able to meet the working requirements of the control valve 100, reducing the working loss of the rotor 31, and being conducive to extending the service life of the control valve 100.

[0150] In some embodiments where the valve core assembly 20 includes a stopper 23, such as Figure 1 , Figure 2 , Fig. 9 , Figure 12-14 , Fig. 27 and Fig.31 As shown, a second balancing channel 312 is provided on the rotating shaft 32, and a first balancing channel 224 is provided on the valve needle 22. The first balancing channel 224 extends along the axial direction of the valve needle 22, and the end of the first balancing channel 224 away from the rotating shaft 32 is connected to the external environment. A second balancing hole 215 is provided on the rotating part 212, and the second balancing hole 215 is connected to the first balancing channel 224, and the connection between the limit member 23 and the rotating part 212 is connected to the second balancing hole 215. Therefore, when the control valve 100 is controlled, the airflow of the external environment can pass through the first balancing channel 224 and the second balancing hole 215, and flow through the connection between the limit member 23 and the rotating part 212 to enter the second cavity 13. The airflow in the second cavity 13 can enter the first cavity 12 from the second balancing channel 312 through the connection between the rotating shaft 32 and the connecting rod 21, thereby realizing the connection between the second cavity 13 and the first cavity 12, thereby realizing the connection between the second cavity 13 and the external environment, ensuring the air pressure balance, and the structure is simple, which is convenient for processing and manufacturing.

[0151] In some embodiments where the first matching portion 311 includes an extension portion 41 and a connection portion 42, such as Figure 5 , Figure 6 and Fig.34 As shown, a first balancing hole 411 is provided on the extension portion 41, and the first balancing hole 411 passes through the extension portion 41 along the axial direction of the rotating shaft 32, so that the airflow flowing from the first cavity 12 to the second cavity 13 can enter the end of the rotor 31 away from the valve core assembly 20 through the first balancing hole 411, ensuring the air pressure balance at both ends of the rotor 31 in the axial direction, and the structure is simple, which is convenient for processing and manufacturing.

[0152] In some embodiments, Figure 5 , Figure 6 and Fig.34 As shown, there are multiple (greater than or equal to two) first balancing holes 411, and the multiple first balancing holes 411 are spaced apart along the circumferential direction of the extension portion 41. The multiple first balancing holes 411 can increase the flow rate of the airflow, making the airflow flow smoother and meeting the demand for air pressure balance.

[0153] In the embodiment of the present utility model, the specific structure of the first balancing hole 411 can be set according to actual conditions. For example, the first balancing hole 411 can be a round hole, a square hole, etc.

[0154] In some embodiments, a guide member 60 is provided between the flange 112 and the bearing 50, such as Fig.31 , Figure 35-Figure 37 As shown, the guide member 60 is opposite to the outlet of the second balancing channel 312, and a through third balancing hole 62 is provided on the guide member 60, and the third balancing hole 62 is opposite to and connected with the outlet of the second balancing channel 312, so that the airflow flowing out from the connection between the rotating shaft 32 and the connecting rod 21 can flow out through the second balancing channel 312 and the third balancing hole 62, avoiding the guide member 60 from blocking the outlet of the second balancing channel 312, ensuring that the airflow flows smoothly from the second balancing channel 312, and the structure is simple, which is convenient for processing and manufacturing.

[0155] Other structures and operations of the control valve 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0156] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0157] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0158] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control valve, characterized in that: include: A valve seat assembly, wherein the valve seat assembly has a through hole extending in the axial direction of the valve seat assembly, one end of the through hole is formed as a first communication port, a second communication port communicating with the through hole is provided on the peripheral wall of the valve seat assembly, an annular protrusion is provided on the hole wall of the through hole, and the protrusion is located on a side of the second communication port close to the first communication port; A valve core assembly, the valve core assembly is movably disposed in the through hole along the axial direction of the valve seat assembly, and the outer peripheral wall of the valve core assembly is suitable for abutting against the protrusion; A drive assembly, the drive assembly is arranged at a side of the second communication port away from the first communication port, the drive assembly is connected to the valve core assembly, and is used to drive the valve core assembly to move along the axial direction of the valve seat assembly; A sealing member is formed in a ring shape, is located in the through hole and is provided on a side of the protruding portion close to the first communicating port, and is used for sealing the through hole and the first communicating port.

2. The control valve according to claim 1, characterized in that: One end of the valve core assembly away from the driving assembly abuts against the sealing member; Alternatively, one end of the valve core assembly away from the driving assembly is inserted into the sealing member, and the outer peripheral wall of the valve core assembly and the inner peripheral wall of the sealing member are sealed.

3. The control valve according to claim 1, characterized in that: Also includes: A stop member is located at a side of the sealing member away from the driving assembly and is fixed on the valve seat assembly, and the sealing member is supported on the stop member.

4. The control valve according to claim 3, characterized in that: The end of the valve seat assembly having the first connecting port is provided with a groove, the through hole penetrates the bottom wall of the groove, the stop member is fixed in the groove, and the sealing member is located between the stop member and the bottom wall of the groove and abuts against the bottom wall of the groove.

5. The control valve according to claim 1, characterized in that: The valve core assembly comprises: A connecting rod, the driving assembly being connected to the connecting rod and used for driving the connecting rod to move along the axial direction of the valve seat assembly; A valve needle is rotatably connected to an end of the connecting rod away from the driving assembly, and the valve needle is suitable for abutting against the protrusion.

6. The control valve according to claim 1, characterized in that: The drive assembly comprises: A rotor, wherein a first matching portion is provided on the rotor; The rotor is sleeved on the rotating shaft, the rotating shaft and the rotor are an integral part, and the rotating shaft is provided with a second matching portion matching with the first matching portion to limit the relative rotation of the rotor and the rotating shaft.

7. The control valve according to claim 6, characterized in that: The second matching portion is formed as a connecting hole extending in the radial direction of the rotating shaft, and the first matching portion is penetrated in the connecting hole.

8. The control valve according to claim 7, characterized in that: The first matching portion comprises: An extension portion, the extension portion is located radially inwardly of the rotor, and the extension portion is connected to the radially inner side of the rotor and the outer peripheral wall of the rotating shaft; A connecting portion is inserted into the connecting hole, and two ends of the connecting portion in a length direction are connected to the extending portion.

9. The control valve according to claim 6, characterized in that: A bearing is provided between the outer peripheral wall of the rotating shaft and the inner wall of the through hole away from the first connecting port, and a flange is provided on the side of the valve seat assembly away from the valve core assembly, and the flange is used to limit the movement of the bearing toward the side away from the valve core assembly.

10. The control valve according to claim 9, characterized in that Along the axial direction of the valve seat assembly, a guide member is provided between the flange and the bearing, and a side of the guide member away from the bearing abuts against a side of the flange facing the bearing.

11. The control valve according to claim 7, characterized in that: The rotating shaft is threadedly connected to the valve core assembly. One of the valve seat assembly and the valve core assembly is provided with a limiting groove, and the other is provided with a limiting piece matched with the limiting groove.

12. The control valve according to claim 7, characterized in that Also includes: The guide bracket is located at a side of the rotor away from the valve core assembly. The guide bracket is provided with a rotation hole. An end of the rotation shaft away from the valve core assembly is rotatably disposed in the rotation hole.

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