Electronic expansion valve

Abstract

The utility model discloses an electronic expansion valve which comprises a shell, a valve element, a valve element and a valve element. The bearing support is provided with a first anti-rotation groove, a first limiting piece and a second limiting piece, the first anti-rotation groove is formed in the circumferential wall of the bearing support, and the first limiting piece and the second limiting piece are located at the two ends of the first anti-rotation groove in the extending direction respectively; the stop piece is arranged in the bearing support and can move in the axial direction of the shell, the peripheral wall of the stop piece is provided with a first anti-rotation convex lug, the first anti-rotation convex lug is located between the first limiting piece and the second limiting piece, and the first limiting piece and the second limiting piece are both used for limiting the stop piece to move in the axial direction of the shell; and the driving assembly is arranged on the shell and comprises a screw rod, and the screw rod is arranged in the stop piece in a penetrating mode and is in threaded connection with the stop piece. According to the electronic expansion valve, the axial height of the screw can be reduced, the overall height of the electronic expansion valve is reduced, miniaturization of the electronic expansion valve is facilitated, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a refrigerant control element technical field especially is related to a kind of electronic expansion valve. BACKGROUND

[0002] With the rapid development of automobile industry, more and more equipment and functions on the car, as a medium for connecting multiple flow paths, the valve is increasingly important in the production and manufacturing process of automobile.In the prior art, the height of the valve is large, the volume is large, and the assembly is inconvenient. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides an electronic expansion valve, the electronic expansion valve can reduce the axial height of screw rod, reduce the height of electronic expansion valve as a whole, make full use of the axial space of electronic expansion valve, be favorable to the miniaturization of electronic expansion valve, reduce the cost of electronic expansion valve.

[0004] The electronic expansion valve according to the utility model embodiment comprises a shell, the shell has a cavity;Bearing support, the bearing support is arranged in the cavity and extends along the axial direction of the shell, the bearing support has a first anti-rotation groove, a first limiting piece and a second limiting piece, the first anti-rotation groove is arranged on the peripheral wall of the bearing support and extends along the axial direction of the shell, the first limiting piece and the second limiting piece are located at both ends of the extension direction of the first anti-rotation groove;Stop piece, the stop piece is arranged in the bearing support and is movable along the axial direction of the shell, the outer peripheral wall of the stop piece has a first anti-rotation lug matched with the first anti-rotation groove, the first anti-rotation lug is located between the first limiting piece and the second limiting piece, the first limiting piece and the second limiting piece are used to limit the movement of the stop piece along the axial direction of the shell;Drive assembly, the drive assembly is arranged on the shell and comprises a screw rod, the screw rod extends along the axial direction of the shell, the screw rod is arranged in the stop piece and is threadedly connected with the stop piece, and is used to drive the stop piece to move along the axial direction of the shell.

[0005] The electronic expansion valve according to the utility model embodiment, by being provided with a first anti-rotation groove, a first limiting piece and a second limiting piece on the bearing support, the outer peripheral wall of the stop piece has a first anti-rotation lug matched with the first anti-rotation groove, the first limiting piece and the second limiting piece limit the movement of the stop piece along the axial direction of the shell, the screw rod can be limited from rotating by being threadedly connected with the stop piece, the purpose of stopping is achieved, so that the axial height of the screw rod can be reduced by rotating a plurality of turns with small pitch, without leaving space in the shell for the rotor component to move along the axial direction of the shell, the height of the electronic expansion valve as a whole can be reduced, the axial space of the electronic expansion valve is fully utilized, which is conducive to the miniaturization of the electronic expansion valve and reduces the cost of the electronic expansion valve.

[0006] In addition, the electronic expansion valve according to the utility model can also have the following additional technical features.

[0007] In some embodiments, the stopper comprises: a stop nut arranged in the bearing support and threadedly connected with the screw rod; and a stop ring sleeved on the stop nut, the first anti-rotation lug being arranged on the outer circumferential wall of the stop ring, and the stop ring being rotatably connected or fixedly connected with the stop nut.

[0008] In some embodiments, the stop ring is rotatably connected with the stop nut, and the stopper further comprises: a stop bearing arranged between the stop nut and the stop ring.

[0009] In some embodiments, the axial end of the stop nut is provided with a rotation notch.

[0010] In some embodiments, the stopper is an integral piece.

[0011] In some embodiments, the first anti-rotation lug is a plurality of lugs spaced apart along the circumferential direction of the stopper, and the first anti-rotation groove is a plurality of grooves corresponding to the plurality of first anti-rotation lugs.

[0012] In some embodiments, the bearing support comprises: a support body extending along the axial direction of the housing, the first anti-rotation groove being arranged on the circumferential wall of the support body, and one end surface of the first anti-rotation groove along the extension direction of the housing being configured as the first limiting piece; and a stop limiting ring located in the support body and spaced apart from the first limiting piece, the stop limiting ring being provided with a through hole, the screw rod being arranged in the through hole, and the end surface of the stop limiting ring facing the first limiting piece being configured as the second limiting piece.

[0013] In some embodiments, at least one of the two ends of the stopper in the axial direction of the housing is provided with a first elastic piece extending along the axial direction of the housing, and the end of the first elastic piece away from the stopper is abutted against or connected with the first inner wall of the bearing support, the first elastic piece being used to drive the stopper to move in a direction away from the first inner wall.

[0014] In some embodiments, the first elastic piece is a spring, and the spring and the bearing support are separate pieces.

[0015] In some embodiments, the first elastic member is integrated with the bearing support, and the first elastic member is formed as a bent portion arranged on the first inner wall and extending towards the stopper, at least a portion of the bent portion has an included angle with the axis of the bearing support, and an end of the bent portion away from the first inner wall is adapted to abut against the stopper.

[0016] In some embodiments, the circumferential wall of the bearing support is further provided with an avoiding groove extending along the axial direction of the housing and arranged opposite to the bent portion, the avoiding groove is spaced apart from the first anti-rotation groove in the circumferential direction of the bearing support, the outer circumferential wall of the stopper is further provided with a stop lobe matched with the avoiding groove, the stop lobe is spaced apart from the first anti-rotation lobe in the circumferential direction of the stopper, and the stop lobe is adapted to abut against the bent portion.

[0017] In some embodiments, the electronic expansion valve further comprises a drive bearing arranged between the screw rod and the bearing support.

[0018] In some embodiments, the housing comprises a valve seat and a sleeve arranged and connected along the axial direction of the housing, the valve seat defines a first cavity, the sleeve defines a second cavity, and the bearing support, the drive assembly and the stopper are located in the second cavity, an end of the bearing support towards the first cavity is provided with a guide portion, a turned edge and an exhaust groove, the guide portion is located in the valve seat and extends along the axial direction of the bearing support, the turned edge extends towards the radial outer side of the bearing support and is connected with the end face of the valve seat close to the sleeve, and the inner bottom wall of the exhaust groove is located on the side of the turned edge away from the first cavity, and the exhaust groove is located between the guide portion and the turned edge in the circumferential direction of the bearing support, for connecting the first cavity and the second cavity.

[0019] In some embodiments, the guide portion is a plurality of guide portions arranged in the circumferential direction of the bearing support, and the turned edge is a plurality of turned edges corresponding to the plurality of guide portions one by one, the plurality of turned edges and the plurality of guide portions are arranged alternately, and the exhaust groove is arranged between any adjacent guide portion and turned edge.

[0020] In some embodiments, the cavity includes a first cavity and a second cavity arranged in an axial direction of the cavity, the shell further has a communication hole in communication with the first cavity and a valve port, the communication hole is provided on a peripheral wall of the shell, and the valve port is provided at an end of the first cavity away from the second cavity, wherein the part of the bearing support, the part of the drive assembly, and the stopper are located in the second cavity, and the electronic expansion valve further includes a valve core provided in the first cavity and threadedly connected with the screw rod, the valve core being movable in the axial direction of the shell to open or close the valve port.

[0021] In some embodiments, the first cavity has a second anti-rotation groove on an inner wall thereof, the second anti-rotation groove extending in the axial direction of the cavity, the valve core includes a valve core body and a drive nut, the valve core body has a third anti-rotation groove thereon, the third anti-rotation groove extending in the axial direction of the cavity, the drive nut is provided in the valve core body and threadedly connected with the screw rod, an outer peripheral wall of the valve core body has a second anti-rotation lug matched with the second anti-rotation groove, and an outer peripheral wall of the drive nut has a third anti-rotation lug matched with the third anti-rotation groove; or, the third anti-rotation groove is opposite to and in communication with the second anti-rotation groove, and an outer peripheral wall of the drive nut has a second anti-rotation lug which is simultaneously provided in the third anti-rotation groove and the second anti-rotation groove.

[0022] Additional aspects and advantages of the present application will be made apparent from the following description, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 is a front view of an electronic expansion valve according to a first embodiment of the present application;

[0025] Figure 2 is a cross-sectional view of the electronic expansion valve according to the first embodiment of the present application;

[0026] Figure 3 is a perspective view of the electronic expansion valve according to the first embodiment of the present application, wherein the sleeve and part of the drive assembly are not shown;

[0027] Figure 4 is a cross-sectional view of the electronic expansion valve according to the first embodiment of the present application from one angle, wherein the sleeve and part of the drive assembly are not shown;

[0028] Figure 5is a sectional view of the electronic expansion valve according to the first embodiment of the present utility model from another angle, wherein the sleeve and part of the drive assembly are not shown;

[0029] Figure 6 is a perspective view of the bearing support and screw cooperation of the electronic expansion valve according to the first embodiment of the present utility model;

[0030] Figure 7 is a sectional view of the bearing support and screw cooperation of the electronic expansion valve according to the first embodiment of the present utility model from one angle;

[0031] Figure 8 is a sectional view of the bearing support and screw cooperation of the electronic expansion valve according to the first embodiment of the present utility model from another angle;

[0032] Figure 9 is a perspective view of the stopper of the electronic expansion valve according to the first embodiment of the present utility model;

[0033] Figure 10 is a sectional view of the stopper of the electronic expansion valve according to the first embodiment of the present utility model;

[0034] Figure 11 is a sectional view of the electronic expansion valve according to the second embodiment of the present utility model from one angle;

[0035] Figure 12 is a sectional view of the electronic expansion valve according to the second embodiment of the present utility model from another angle;

[0036] Figure 13 is a perspective view of the stopper, drive bearing and screw cooperation of the electronic expansion valve according to the second embodiment of the present utility model;

[0037] Figure 14 is a sectional view of the electronic expansion valve according to the third embodiment of the present utility model from one angle;

[0038] Figure 15 is a sectional view of the electronic expansion valve according to the third embodiment of the present utility model from another angle;

[0039] Figure 16 is a sectional view of the electronic expansion valve according to the fourth embodiment of the present utility model;

[0040] Figure 17 is a sectional view of the electronic expansion valve according to the fourth embodiment of the present utility model, wherein the sleeve and part of the drive assembly are not shown.

[0041] Reference signs:

[0042] 100, electronic expansion valve;

[0043] 1, housing; 10, cavity; 101, first cavity; 1011, first sub-cavity; 1012, second sub-cavity; 102, second cavity; 103, second anti-rotation groove; 11, valve seat; 12, sleeve; 13, communication hole; 14, valve port;

[0044] 2, bearing support; 21, support body; 211, first anti-rotation groove; 212, first limiting piece; 213, avoiding groove; 214, first section; 215, second section; 216, bending section; 22, stop limiting ring; 221, via hole; 222, second limiting piece; 23, third limiting piece; 231, limiting ring; 24, fourth limiting piece; 25, guide part; 26, flange; 27, exhaust groove;

[0045] 3, stop piece; 31, stop nut; 311, rotation notch; 32, stop ring; 321, first anti-rotation lug; 33, stop bearing; 34, first elastic piece; 35, stop lug;

[0046] 4, drive assembly; 41, screw rod; 42, rotor part; 43, guide piece;

[0047] 5, drive bearing;

[0048] 6, valve core; 60, balance flow channel; 601, first flow channel; 602, second flow channel; 61, valve core body; 611, third anti-rotation groove; 612, body part; 613, stop part; 62, drive nut; 63, second elastic piece; 64, second anti-rotation lug; 66, balance sealing ring. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0050] In the description of the present application, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] The electronic expansion valve 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0054] like Figure 2 As shown, the electronic expansion valve 100 according to an embodiment of the present invention includes a housing 1, a bearing support 2, a stop member 3, and a drive assembly 4.

[0055] Specifically, see the attached document. Figure 1 and attached Figure 2 As shown, the housing 1 protects the internal structure of the electronic expansion valve 100, which helps to extend the service life of the electronic expansion valve 100. The housing 1 has a cavity 10, and the bearing support 2 is disposed in the cavity 10 and along the axial direction of the housing 1 (see attached figure). Figure 2 Extending in the direction shown (a), the bearing support 2 has a first anti-rotation groove 211, a first limiting member 212, and a second limiting member 222. The first anti-rotation groove 211 is provided on the peripheral wall of the bearing support 2 and extends along the axial direction of the housing 1. The first limiting member 212 and the second limiting member 222 are respectively located in the extending direction of the first anti-rotation groove 211 (see attached diagram). Figure 2 The two ends of direction a shown.

[0056] Further, see Appendix Figure 2As shown, the stop member 3 is disposed within the bearing support 2 and is movable along the axial direction of the housing 1. The outer peripheral wall of the stop member 3 has a first anti-rotation lug 321 that mates with the first anti-rotation groove 211. The first anti-rotation lug 321 is located between the first limiting member 212 and the second limiting member 222. Both the first limiting member 212 and the second limiting member 222 are used to restrict the movement of the stop member 3 along the axial direction of the housing 1. The drive assembly 4 is disposed on the housing 1 and includes a screw 41. The screw 41 extends along the axial direction of the housing 1 and passes through the stop member 3 and is threadedly connected to the stop member 3, for driving the stop member 3 along the axial direction of the housing 1. During the axial movement of the stop 3 driven by the screw 41 along the axial direction of the housing 1, the first anti-rotation lug 321 and the first anti-rotation groove 211 cooperate to guide and position the stop 3, ensuring that the stop 3 moves only along the axial direction of the housing 1, preventing the stop 3 from rotating, preventing the stop 3 from getting stuck during rotation, and preventing the stop 3 from not moving along the axial direction of the housing 1 due to rotation, thereby preventing the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and extending the service life of the electronic expansion valve 100.

[0057] It should be noted that the reference appendix Figure 2 As shown, the drive assembly 4 also includes a coil component, a rotor component 42, and a guide member 43. The coil component is sleeved outside the housing 1, and the rotor component 42 is disposed inside the housing 1. The coil component and the rotor component 42 are arranged opposite to each other. The coil component is used to drive the rotor component 42 to rotate. The guide member 43 is fixed inside the rotor component 42, and the screw 41 passes through the guide member 43 along its length (see attached figure). Figure 2 One end of the rotor (in direction a) is welded to the guide 43, so that the rotor component 42, the guide 43 and the screw 41 rotate synchronously. The screw 41 passes through both the guide 43 and the stop 3. The guide 43 and the stop 3 are spaced apart along the axial direction of the housing 1, which can prevent the screw 41 from deviating during rotation and ensure the normal rotation of the screw 41.

[0058] It is understandable that, such as Figure 2 As shown, when the coil component is energized, the coil component drives the rotor component 42 to rotate. Since the screw 41 is fixedly connected to the rotor component 42 through the guide 43, the rotor component 42 drives the screw 41 to rotate together. Under the drive of the screw 41, the stop 3 moves along the axial direction of the housing 1 until the first anti-rotation lug 321 abuts against the first limiting member 212 or the second limiting member 222, restricting the stop 3 from continuing to move along the axial direction of the housing 1. Since the screw 41 is threadedly connected to the stop 3, the screw 41 cannot continue to rotate, thus achieving the purpose of stopping.

[0059] It can be understood that the prior art often realizes the limiting of the valve core through the cooperation of the slip ring and the spring, the rotor component needs to move along the axial direction of the shell while rotating, and the utility model realizes the limiting effect of the valve core 6 by limiting the movement of the stop piece 3 along the axial direction of the shell 1 through the abutment of the first anti-rotation lug 321 and the first limiting piece 212 or the second limiting piece 222, thereby limiting the rotation of the screw rod 41, so that the rotor component 42 does not need to move along the axial direction of the shell 1, and thus the space for the movement of the rotor component 42 along the axial direction of the shell 1 is not needed in the shell 1, the axial length of the rotor component 42 and the amount of rotor magnetic powder are reduced, thereby the height of the electronic expansion valve 100 can be reduced, the axial space of the electronic expansion valve 100 is fully utilized, and the miniaturization of the electronic expansion valve 100 is facilitated, and the cost of the electronic expansion valve 100 is reduced.

[0060] Moreover, since the stop piece 3 is threadedly connected with the screw rod 41, the axial height of the screw rod 41 can be reduced through the rotation of multiple turns with a small pitch, the height caused by the cumulative diameter and pitch of the spring stop in the prior art is effectively reduced, the height of the electronic expansion valve 100 is further reduced, and the miniaturization of the electronic expansion valve 100 is facilitated. At the same time, since the design of the slip ring and the spring is cancelled, the noise problem caused by the slip ring to the spring stop is solved, the noise of the electronic expansion valve 100 in the use process is reduced, the problem of the fracture of the spring caused by excessive stress is avoided, and the service life of the electronic expansion valve 100 is relatively prolonged.

[0061] Optionally, the thread connection between the stop piece 3 and the screw rod 41 is not limited to the ordinary thread, and can also be in the form of non-self-locking internal thread, trapezoidal thread, circular thread or rectangular thread. The bearing support 2 can be a metal piece or an injection molded piece, which is not limited here.

[0062] According to the electronic expansion valve 100 provided by the utility model, the first anti-rotation groove 211, the first limiting piece 212 and the second limiting piece 222 are arranged on the bearing support 2, the outer peripheral wall of the stop piece 3 is provided with the first anti-rotation lug 321 matched with the first anti-rotation groove 211, the first limiting piece 212 and the second limiting piece 222 limit the movement of the stop piece 3 along the axial direction of the shell 1, the rotation of the screw rod 41 can be limited through the thread connection between the stop piece 3 and the screw rod 41, the purpose of stopping is achieved, the axial height of the screw rod 41 can be reduced through the rotation of multiple turns with a small pitch, the space for the movement of the rotor component 42 along the axial direction of the shell 1 is not needed in the shell 1, the height of the electronic expansion valve 100 can be reduced, the axial space of the electronic expansion valve 100 is fully utilized, the miniaturization of the electronic expansion valve 100 is facilitated, and the cost of the electronic expansion valve 100 is reduced.

[0063] In some embodiments of the utility model, reference is made to the accompanying drawings Figure 6 , the accompanying drawings Figure 7 and the accompanying drawingsFigure 8 As shown in the drawings, the bearing support 2 comprises a support body 21 extending along the axial direction of the shell 1 and a stop limiting ring 22, a first anti-rotation groove 211 is arranged on the peripheral wall of the support body 21, one end face of the first anti-rotation groove 211 in the extension direction of the shell 1 (referring to the a direction in the drawings) is configured as a first limiting piece 212, the stop limiting ring 22 is located in the support body 21 and is spaced apart from the first limiting piece 212, the stop limiting ring 22 is provided with a through hole 221, the threaded rod 41 is arranged in the through hole 221, and the end face of the stop limiting ring 22 facing the first limiting piece 212 is configured as a second limiting piece 222. Figure 2 As shown in the drawings, the bearing support 2 comprises a support body 21 extending along the axial direction of the shell 1 and a stop limiting ring 22, a first anti-rotation groove 211 is arranged on the peripheral wall of the support body 21, one end face of the first anti-rotation groove 211 in the extension direction of the shell 1 (referring to the a direction in the drawings) is configured as a first limiting piece 212, the stop limiting ring 22 is located in the support body 21 and is spaced apart from the first limiting piece 212, the stop limiting ring 22 is provided with a through hole 221, the threaded rod 41 is arranged in the through hole 221, and the end face of the stop limiting ring 22 facing the first limiting piece 212 is configured as a second limiting piece 222.

[0064] For example, as shown in the drawings, Figure 6 , the drawings, Figure 7 and the drawings, Figure 8 , the drawings, Figure 2 , the drawings, the end of the first anti-rotation groove 211 close to the guide piece 43 is open, the end of the first anti-rotation groove 211 away from the guide piece 43 is configured as the first limiting piece 212, the stop limiting ring 22 is arranged at the end of the support body 21 close to the guide piece 43, and the end of the stop limiting ring 22 away from the guide piece 43 is configured as the second limiting piece 222; as shown in the drawings, Figure 14 and the drawings, Figure 15 , the drawings, the end of the first anti-rotation groove 211 away from the guide piece 43 is open, the end of the first anti-rotation groove 211 close to the guide piece 43 is configured as the first limiting piece 212, the stop limiting ring 22 is arranged at the end of the support body 21 away from the guide piece 43, and the end of the stop limiting ring 22 facing the guide piece 43 is configured as the second limiting piece 222.

[0065] It should be noted that, as shown in the drawings, Figure 3 , the drawings, Figure 4 and the drawings, Figure 5 , the drawings, the stop limiting ring 22 is provided with the through hole 221, and the threaded rod 41 is arranged in the through hole 221, so that the stop limiting ring 22 can limit the threaded rod 41 in the radial direction, avoid the threaded rod 41 from deviating during rotation, ensure the normal rotation of the threaded rod 41, and thus avoid the deviation of the rotor component 42 caused by the deviation of the threaded rod 41, avoid the friction between the rotor component 42 and the inner wall of the shell 1, and thus avoid the loss of power. When assembling the bearing support 2, the stop limiting ring 22 and the support body 21 are first pressed together, and then the stop limiting ring 22 and the support body 21 are welded and fixed, which can increase the structural strength of the bearing support 2.

[0066] In some embodiments of the utility model, as shown in the drawings, Figure 11 , the drawings, Figure 12and attached Figure 10 As shown in the figure, the stopper 3 comprises a stop nut 31 and a stop ring 32, the stop nut 31 is arranged in the bearing support 2, and the stop nut 31 is threadedly connected with the screw rod 41, the stop ring 32 is sleeved on the stop nut 31, the first anti-rotation lug 321 is arranged on the outer circumferential wall of the stop ring 32, and the stop ring 32 is rotatably connected or fixedly connected with the stop nut 31, so that the production difficulty of the stop nut 31 and the stop ring 32 can be reduced, and the production and processing of the stopper 3 are facilitated.

[0067] It can be understood that, as Figure 2 and Figure 12 shown, when the coil component is energized, the coil component drives the rotor component 42 to rotate, since the screw rod 41 is fixedly connected with the rotor component 42 through the guide 43, the rotor component 42 drives the screw rod 41 to rotate together, under the driving of the screw rod 41, the stop nut 31 moves along the axial direction of the shell 1, since the stop nut 31 is fixedly connected with the stop ring 32, the stop ring 32 moves along the axial direction of the shell 1 together with the stop nut 31, until the first anti-rotation lug 321 abuts against the first limiting piece 212 or the second limiting piece 222, the stop ring 32 is limited to continue to move along the axial direction of the shell 1, since the screw rod 41 is threadedly connected with the stop nut 31, the screw rod 41 cannot continue to rotate, and the purpose of stopping is achieved.

[0068] It should be noted that, as Figure 11 and Figure 13 shown, the stop ring 32 is fixedly connected with the stop nut 31, in the assembly of the electronic expansion valve 100, the stop nut 31 is matched with the screw rod 41 first, the stop nut 31 is screwed into the support body 21, then the first anti-rotation lug 321 is aligned with the end of the first anti-rotation groove 211 away from the first limiting piece 212, the stop ring 32 is moved towards the stop nut 31 until the first anti-rotation lug 321 abuts against the first limiting piece 212, then the stop ring 32 is fixedly connected with the stop nut 31, and finally the stop limiting ring 22 is installed on the support body 21. Alternatively, the stop ring 32 and the stop nut 31 can be connected in a mode of welding, riveting, clamping or interference fit.

[0069] In a further embodiment of the present application, reference is made to Figure 9 and Figure 10 shown, in combination with reference to Figure 2The stop ring 32 is rotatably connected to the stop nut 31. The stop component 3 also includes a stop bearing 33, which is located between the stop nut 31 and the stop ring 32. The outer ring of the stop bearing 33 is fixed to the stop ring 32, and the inner ring is fixed to the stop nut 31 and rotates synchronously. The stop bearing 33 is configured to meet both the requirement of the first anti-rotation lug 321 on the stop ring 32 and the requirement of the threaded engagement between the stop nut 31 and the screw 41 when the stop component 3 is assembled onto the bearing support 2, thus ensuring that the stop ring 32 is only aligned along the axial direction of the bearing support 2 (see attached figure). Figure 2 The screw 41 moves in the direction shown (a), while the stop nut 31 moves along the axial direction of the screw 41 (see attached diagram). Figure 2 The movement in direction a) shown rotates relative to the screw 41, thereby realizing the assembly of the stop 3 with the bearing support 2 and the screw 41.

[0070] It should be noted that, as Figure 9 As shown, in conjunction with reference Figure 2 When assembling the electronic expansion valve 100, first assemble the stop nut 31, stop ring 32 and stop bearing 33 together to form a complete stop part 3. Then align the first anti-rotation lug 321 with the end of the first anti-rotation groove 211 that is away from the first limiting member 212, and move the entire stop part 3 toward the first limiting member 212 until the first anti-rotation lug 321 abuts against the first limiting member 212. Then install the stop limiting ring 22 on the support body 21. Finally, assemble the installed bearing support 2 and stop part 3 together onto the valve seat 11 and screw 41.

[0071] In a further embodiment of this utility model, reference is made to the appendix. Figure 9 As shown, the stop nut 31 has a rotating notch 311 at one axial end. The rotating notch 311 can be multiple notches spaced apart along the circumferential direction of the stop nut 31. The rotating notch 311 makes it easier for the assembler to use tools to hold the stop nut 31 and screw it onto the screw 41, thereby reducing the assembly difficulty of the stop part 3 and improving the assembly efficiency of the electronic expansion valve 100.

[0072] In some embodiments of this utility model, reference is made to the appendix. Figure 14 and attached Figure 16 As shown, the stop component 3 is a single piece, resulting in low production costs. This reduces the number of parts in the electronic expansion valve 100, simplifies the assembly process, and improves assembly efficiency. It should be noted that, as... Figure 14As shown, when assembling the electronic expansion valve 100, the drive bearing 5, the stop limiting ring 22 and the screw rod 41 are assembled to the valve seat 11 first, then the stop piece 3 is threadedly connected with the screw rod 41, so that the stop piece 3 moves towards the second limiting piece 222 until the first anti-rotation lug 321 abuts against the second limiting piece 222, finally the support body 21 is assembled to the stop limiting ring 22, and after confirming that the first anti-rotation groove 211 is aligned with the first anti-rotation lug 321, the support body 21 and the stop limiting ring 22 are welded and fixed.

[0073] In some embodiments of the present application, reference is made to the accompanying drawings Figure 9 As shown, the first anti-rotation lug 321 is spaced apart along the circumferential direction of the stop piece 3, and the first anti-rotation groove 211 is one-to-one corresponding to the plurality of first anti-rotation lugs 321, which can position the stop piece 3 at a plurality of positions spaced apart in the circumferential direction of the stop piece 3, thereby preventing the stop piece 3 from rotating relative to the bearing support 2, ensuring that the stop piece 3 is movable along the axial direction of the shell 1, thereby avoiding the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100. For example, the first anti-rotation lug 321 can be two, three, four, five or six spaced apart along the circumferential direction of the stop piece 3, and the first anti-rotation groove 211 can be two, three, four, five or six one-to-one corresponding to the plurality of first anti-rotation lugs 321.

[0074] In one specific example, reference is made to the accompanying drawings Figure 2 and the accompanying drawings Figure 9 As shown, the first anti-rotation lug 321 is two spaced apart along the circumferential direction of the stop piece 3, and the two first anti-rotation lugs 321 are located on opposite sides of the stop piece 3, and the first anti-rotation groove 211 is two one-to-one corresponding to the two first anti-rotation lugs 321, which can position the stop piece 3 at two positions spaced apart in the circumferential direction of the stop piece 3, thereby further preventing the stop piece 3 from rotating relative to the bearing support 2, ensuring that the stop piece 3 is movable along the axial direction of the shell 1, avoiding the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100.

[0075] In some embodiments of the present application, reference is made to the accompanying drawings Figure 14 and the accompanying drawings Figure 16 As shown, at least one of the two ends of the stop piece 3 along the axial direction of the shell 1 is provided with a first elastic member 34, the first elastic member 34 extends along the axial direction of the shell 1, and the end of the first elastic member 34 away from the stop piece 3 abuts against or is connected with the first inner wall of the bearing support 2, and the first elastic member 34 is used to drive the stop piece 3 to move towards the direction away from the first inner wall.

[0076] It can be understood that, due to the opening degree stroke of the valve core 6, when the first anti-rotation lug 321 abuts against the first limiting piece 212 or the second limiting piece 222 after the set pulse number is greater than the stop stroke, the rotor component 42 will still drive the screw rod 41 to rotate and apply a torque to the stop piece 3, causing the stop piece 3 to be locked with the screw rod 41, resulting in excessive locking force, so that when the screw rod 41 reversely rotates, the rotor component 42 cannot make the stop piece 3 disengage from the screw rod 41, causing the risk of the electronic expansion valve 100 being stuck. By providing the first elastic piece 34 at at least one of the two ends of the stop piece 3 in the axial direction of the shell 1, the pre-tightening force of the first elastic piece 34 is smaller than the axial force provided by the rotor component 42, when the first anti-rotation lug 321 abuts against the first limiting piece 212 or the second limiting piece 222, the first anti-rotation lug 321 compresses the first elastic piece 34, and as the first elastic piece 34 is compressed, the pre-tightening force of the first elastic piece 34 increases, but is still smaller than the axial force provided by the rotor component 42, which can reduce the locking force of the stop piece 3 and the screw rod 41, and is conducive to the disengagement of the stop piece 3 when the screw rod 41 reversely rotates, avoiding the stop piece 3 being stuck, thereby ensuring the normal use of the electronic expansion valve 100 and prolonging the service life of the electronic expansion valve 100.

[0077] It can be understood that, at least one of the two ends of the stop piece 3 in the axial direction of the shell 1 is provided with the first elastic piece 34, which can be that only one end of the stop piece 3 facing the stop limiting ring 22 is provided with the first elastic piece 34, and the other end of the stop piece 3 away from the stop limiting ring 22 is not provided with the first elastic piece 34; or only one end of the stop piece 3 away from the stop limiting ring 22 is provided with the first elastic piece 34, and the other end of the stop piece 3 facing the stop limiting ring 22 is not provided with the first elastic piece 34; or both ends of the stop piece 3 in the axial direction of the shell 1 are provided with the first elastic piece 34.

[0078] In a further embodiment of the present application, with reference to the accompanying drawings Figure 14 and the accompanying drawings Figure 15 It is shown that the first elastic piece 34 is a spring, and the spring and the bearing support 2 are separate parts, and the two ends of the spring length direction (with reference to the a direction shown in the accompanying drawings Figure 15 abut against the first inner wall of the stop piece 3 and the bearing support 2 respectively, which can reduce the manufacturing difficulty of the first elastic piece 34 and the bearing support 2, and facilitate the production and processing of the bearing support 2. In one specific example, with reference to the accompanying drawings Figure 14 and the accompanying drawings Figure 15As shown in the drawings, one end of the first anti-rotation groove 211 away from the guide 43 is open, the stop limiting ring 22 is arranged at the end of the support body 21 away from the guide 43, the end of the stop 3 towards the guide 43 is provided with a spring, the end of the spring towards the guide 43 is in abutment with the first inner wall, the end of the spring away from the guide 43 is in abutment with the stop 3, and the spring is arranged only at one end of the stop 3 in the axial direction of the shell 1, so that the production cost of the electronic expansion valve 100 can be relatively reduced.

[0079] In a further embodiment of the present application, reference is made to the accompanying Figure 16 and the accompanying Figure 17 As shown in the drawings, the first elastic member 34 is an integral part of the bearing support 2, the first elastic member 34 is formed as a bending portion arranged on the first inner wall and extending towards the stop 3, at least part of the bending portion has an included angle with the axis of the bearing support 2, and the end of the bending portion away from the first inner wall is adapted to abut against the stop 3 for driving the stop 3 to move towards the direction away from the first inner wall. By making the first elastic member 34 an integral part of the bearing support 2, the production cost of the electronic expansion valve 100 can be reduced, the number of parts of the electronic expansion valve 100 can be relatively reduced, the assembly process of the electronic expansion valve 100 can be simplified, and the assembly efficiency of the electronic expansion valve 100 can be improved.

[0080] Of course, the present application is not limited thereto, the first inner wall can be a side inner wall of the bearing support 2 in the axial direction of the shell 1, and the first inner wall can also be a circumferential wall of the bearing support 2. When the first inner wall is the circumferential wall of the bearing support 2, the bending portion is arranged on the circumferential wall of the bearing support 2, the bending portion extends generally in the axial direction of the shell 1 and at least part of the bending portion has an included angle with the axis of the bearing support 2, and the end of the bending portion away from the guide 43 is adapted to abut against the stop 3 for driving the stop 3 to move towards the direction away from the guide 43.

[0081] In a further embodiment of the present application, reference is made to the accompanying Figure 16 and the accompanying Figure 17 As shown in the drawings, the circumferential wall of the bearing support 2 is further provided with an avoiding groove 213, the avoiding groove 213 extends in the axial direction of the shell 1 and is arranged opposite to the bending portion, the avoiding groove 213 is spaced apart from the first anti-rotation groove 211 in the circumferential direction of the bearing support 2, the outer circumferential wall of the stop 3 is further provided with a stop lug 35 matched with the avoiding groove 213, the stop lug 35 is spaced apart from the first anti-rotation lug 321 in the circumferential direction of the stop 3, and the stop lug 35 is adapted to abut against the bending portion. It can be understood that the stop lug 35 is arranged in the avoiding groove 213 and extends along the extension direction of the avoiding groove 213 (reference is made to the accompanying Figure 16The stop lugs 35 are spaced apart along the circumferential direction of the stop piece 3, and the avoidance grooves 213 are correspondingly spaced apart. On the one hand, the locking force of the stop piece 3 and the screw rod 41 can be reduced, and the stop piece 3 can be released when the screw rod 41 is reversely rotated, thereby avoiding the stop piece 3 from being locked and ensuring normal use of the electronic expansion valve 100. On the other hand, the stop piece 3 can be positioned at multiple positions spaced apart along the circumferential direction of the stop piece 3, thereby preventing the stop piece 3 from rotating relative to the bearing support 2 and ensuring that the stop piece 3 is movable along the axial direction of the shell 1, thereby preventing the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100.

[0082] Further, referring to the accompanying drawings Figure 16 and the accompanying drawings Figure 17 As shown in the drawings, the stop lugs 35 are spaced apart along the circumferential direction of the stop piece 3, and the avoidance grooves 213 are correspondingly spaced apart. On the one hand, the locking force of the stop piece 3 and the screw rod 41 can be reduced, and the stop piece 3 can be released when the screw rod 41 is reversely rotated, thereby avoiding the stop piece 3 from being locked and ensuring normal use of the electronic expansion valve 100. On the other hand, the stop piece 3 can be positioned at multiple positions spaced apart along the circumferential direction of the stop piece 3, thereby preventing the stop piece 3 from rotating relative to the bearing support 2 and ensuring that the stop piece 3 is movable along the axial direction of the shell 1, thereby preventing the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100. For example, the stop lugs 35 can be two, three, four, five or six spaced apart along the circumferential direction of the stop piece 3, and the avoidance grooves 213 can be two, three, four, five or six correspondingly spaced apart.

[0083] In a specific example, referring to the accompanying drawings Figure 16 and the accompanying drawings Figure 17 As shown in the drawings, the stop lugs 35 are spaced apart along the circumferential direction of the stop piece 3, and the avoidance grooves 213 are correspondingly spaced apart. On the one hand, the locking force of the stop piece 3 and the screw rod 41 can be reduced, and the stop piece 3 can be released when the screw rod 41 is reversely rotated, thereby avoiding the stop piece 3 from being locked and ensuring normal use of the electronic expansion valve 100. On the other hand, the stop piece 3 can be positioned at multiple positions spaced apart along the circumferential direction of the stop piece 3, thereby preventing the stop piece 3 from rotating relative to the bearing support 2 and ensuring that the stop piece 3 is movable along the axial direction of the shell 1, thereby preventing the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100. For example, the stop lugs 35 can be two, three, four, five or six spaced apart along the circumferential direction of the stop piece 3, and the avoidance grooves 213 can be two, three, four, five or six correspondingly spaced apart.

[0084] In some embodiments of the present application, referring to the accompanying drawings Figure 7 and the accompanying drawingsFigure 8 As shown, the electronic expansion valve 100 also includes a drive bearing 5, which is located between the screw 41 and the bearing support 2. The outer ring of the drive bearing 5 is fixed to the bearing support 2, and the inner ring is fixed to the screw 41 and rotates synchronously. The drive bearing 5 ensures the normal rotation of the screw 41 and also fixes the screw 41, further preventing the screw 41 from shifting during rotation.

[0085] It should be noted that the bearing support 2 is a stamped part. Through the cooperation of the drive bearing 5 and the bearing support 2, it can replace the nut structure in the prior art. While ensuring the guiding and positioning effects on the screw 41 and the stop 3, it eliminates the need to tap threads on the bearing support 2, reducing the precision requirements of the bearing support 2 and lowering the manufacturing cost of the electronic expansion valve 100. Furthermore, since the nut structure in the prior art is an injection-molded PEEK (polyetheretherketone) or copper part, and is driven by threads, it is prone to friction and chipping, affecting the product's operation. This utility model avoids the problem of friction and chipping, ensuring the normal use of the electronic expansion valve 100 and extending its service life.

[0086] In a further embodiment of this utility model, reference is made to the appendix. Figure 7 and attached Figure 8 As shown, the bearing support 2 also has a third limiting member 23 and a fourth limiting member 24. Both the third limiting member 23 and the fourth limiting member 24 are located on the side of the first limiting member 212 away from the stop member 3. The third limiting member 23 restricts the drive bearing 5 from moving away from the stop member 3, and the fourth limiting member 24 restricts the drive bearing 5 from moving closer to the stop member 3. The third limiting member 23 and the fourth limiting member 24 can respectively move from the axial direction of the drive bearing 5 (see attached diagram). Figure 8 The two sides of the drive bearing 5 (in the direction shown in a) limit the drive bearing 5 and jointly position the drive bearing 5 to prevent the drive bearing 5 from moving along the axial direction of the housing 1, thus ensuring the fit between the drive bearing 5 and the screw 41 and ensuring the normal rotation of the screw 41.

[0087] In a specific example, see Appendix Figure 7 and attached Figure 8 As shown, the bearing support 2 also includes a retaining ring 231, which is located at the end of the support body 21 away from the guide member 43. The end face of the retaining ring 231 facing the guide member 43 is configured as a third retaining member 23. The support body 21 includes a first section 214, a second section 215, and a bent section 216. The first section 214 and the second section 215 are along the axial direction of the bearing support 2 (see attached diagram). Figure 8The second section 215 is arranged and extends along the a direction shown, the diameter of the second section 215 is greater than that of the first section 214, the bending section 216 is located between the first section 214 and the second section 215 along the axial direction of the bearing support 2, the bending section 216 extends along the radial direction of the bearing support 2, the radially inner end of the bending section 216 is connected with the first section 214, and the radially outer end of the bending section 216 is connected with the second section 215, and the side end face of the bending section 216 away from the guide 43 is configured as the fourth limiting piece 24. When the drive bearing 5 is assembled to the bearing support 2, the drive bearing 5 is first placed in the direction from the second section 215 to the first section 214 until the drive bearing 5 abuts against the side end face of the bending section 216 away from the guide 43, then the limiting ring 231 is assembled into the second section 215 and is in interference fit with the second section 215, so that the side end face of the limiting ring 231 towards the guide 43 abuts against the drive bearing 5, and finally the limiting ring 231 is welded to the support body 21, and the assembly of the drive bearing 5 is completed.

[0088] In some embodiments of the utility model, reference is made to the accompanying drawings Figure 2 As shown in the drawings, the shell 1 comprises a valve seat 11 and a sleeve 12 arranged and connected along the axial direction of the shell 1, the valve seat 11 defines a first cavity 101, the sleeve 12 defines a second cavity 102, part of the bearing support 2, part of the drive assembly 4 and the stopper 3 are all located in the second cavity 102, the end of the bearing support 2 towards the first cavity 101 is provided with a guide part 25, a flange 26 and an exhaust groove 27, the guide part 25 is located in the valve seat 11 and extends along the axial direction of the bearing support 2, the flange 26 is bent and extends towards the radially outer side of the bearing support 2, and the flange 26 is connected with the end face of the valve seat 11 close to the sleeve 12, the inner bottom wall of the exhaust groove 27 is located on the side of the flange 26 away from the first cavity 101, and in the circumferential direction of the bearing support 2, the exhaust groove 27 is located between the guide part 25 and the flange 26, for connecting the first cavity 101 and the second cavity 102, so that the air pressure in the second cavity 102 can be kept consistent with the air pressure in the first cavity 101, the valve core 6 can be kept in a pressure balance state during switching, and the normal movement of the valve core 6 along the axial direction of the shell 1 is not affected.

[0089] It can be understood that when the bearing support 2 is assembled to the shell 1, the guide part 25 is first inserted into the valve seat 11 from the end of the valve seat 11 towards the sleeve 12, and when the flange 26 abuts against the end of the valve seat 11 towards the sleeve 12, the flange 26 is fixedly connected with the valve seat 11, so that the guide part 25 can play a guiding role, which is beneficial to the centering of the bearing support 2 and the entire electronic expansion valve 100 when the bearing support 2 is assembled to the valve seat 11, and facilitates the assembly of the bearing support 2, and the flange 26 can play a fixing role, which facilitates the connection of the bearing support 2 and the valve seat 11 and improves the reliability of the electronic expansion valve 100.

[0090] It should be noted that the flange 26 is welded to the end face of the valve seat 11 facing the sleeve 12. The connection strength is high and it can withstand a large force, ensuring the reliability of the connection between the flange 26 and the valve seat 11 and improving the stability of the bearing support 2.

[0091] In a further embodiment of this utility model, reference is made to the appendix. Figure 6 As shown, there are multiple guide sections 25 spaced apart along the circumferential direction of the bearing support 2, and multiple flanges 26 corresponding one-to-one with the multiple guide sections 25. The multiple flanges 26 and the multiple guide sections 25 are staggered. An exhaust groove 27 is provided between any adjacent guide section 25 and flange 26. The arrangement of multiple guide sections 25 can improve the guiding effect of the guide sections 25 on the bearing support 2, facilitate the alignment of the bearing support 2, and facilitate the assembly of the bearing support 2. The arrangement of multiple flanges 26 can strengthen the connection between the bearing support 2 and the valve seat 11, and improve the reliability of the electronic expansion valve 100. The arrangement of multiple exhaust grooves 27 can increase the communication path between the first cavity 101 and the second cavity 102, ensure the pressure balance inside the electronic expansion valve 100, and ensure the normal movement of the valve core 6 along the axial direction of the housing 1.

[0092] In a specific example, see Appendix Figure 6 As shown, there are three guide sections 25 spaced apart along the circumferential direction of the bearing support 2, and three flanges 26 corresponding to the three guide sections 25. The three flanges 26 and the three guide sections 25 are staggered, and an exhaust groove 27 is provided between any adjacent guide sections 25 and flanges 26.

[0093] In some embodiments of this utility model, reference is made to the appendix. Figure 2 As shown, cavity 10 includes a cavity 10 in the axial direction (see attached diagram). Figure 2 The first cavity 101 and the second cavity 102 are arranged in the direction shown (a). The housing 1 also has a connecting hole 13 and a valve port 14 communicating with the first cavity 101. The connecting hole 13 is located on the peripheral wall of the housing 1. The valve port 14 is located at the end of the first cavity 101 away from the second cavity 102. The bearing support 2, the drive assembly 4, and the stop 3 are all located in the second cavity 102. The electronic expansion valve 100 also includes a valve core 6. The valve core 6 is located in the first cavity 101 and is threadedly connected to the screw 41. The valve core 6 is located on the side of the stop 3 facing the valve port 14. The valve core 6 is movable along the axial direction of the housing 1 to open or close the valve port 14.

[0094] It can be understood that under the driving of the driving assembly 4, the screw rod 41 drives the valve core 6 to move along the axial direction of the shell 1, when the valve core 6 opens the valve port 14, the medium can flow into the cavity 10 from one of the valve port 14 and the communication hole 13, and flow from the cavity 10 to the other of the valve port 14 and the communication hole 13, when the valve core 6 closes the valve port 14, the medium in the cavity 10 cannot flow out of the valve port 14, and the medium outside the electronic expansion valve 100 cannot flow into the cavity 10 through the valve port 14, by opening or closing the valve port 14, different use requirements of users can be met, and the use experience of users is improved.

[0095] Further, referring to the accompanying drawings Figure 2 As shown in the drawings, the valve core 6 has a balance flow channel 60 extending along the axial direction of the cavity 10, both ends of the balance flow channel 60 along the axial direction of the cavity 10 are open, and the balance sealing ring 66 is arranged between the outer peripheral wall of the valve core 6 and the inner peripheral wall of the first cavity 101, so that the first cavity 101 is divided into a first sub-cavity 1011 and a second sub-cavity 1012, the first sub-cavity 1011 and the second sub-cavity 1012 are arranged along the axial direction of the shell 1, the second sub-cavity 1012 is always communicated with the second cavity 102 through the exhaust groove 27, the first sub-cavity 1011 is located on the side of the second sub-cavity 1012 away from the second cavity 102, and the valve port 14 and the communication hole 13 are communicated with the first sub-cavity 1011.

[0096] It can be understood that the medium enters the balance flow channel 60 from the end of the balance flow channel 60 facing the valve port 14, and flows along the balance flow channel 60 to the second sub-cavity 1012, and then flows into the second cavity 102 through the exhaust groove 27, so that the gas pressure in the second cavity 102, the gas pressure in the second sub-cavity 1012 and the gas pressure on the side of the valve core 6 away from the second cavity 102 are consistent, the valve core 6 is always in a pressure balance state during switching, and the normal movement of the valve core 6 along the axial direction of the shell 1 is avoided. For example, the medium can be refrigerant.

[0097] In a further embodiment of the present application, referring to the accompanying drawings Figure 2As shown, the inner wall of the first cavity 101 has a second anti-rotation groove 103 extending along the axial direction of the cavity 10, the valve core 6 comprises a valve core body 61 and a drive nut 62, the valve core body 61 defines a balance flow channel 60, the valve core body 61 has a third anti-rotation groove 611 extending along the axial direction of the cavity 10 and communicating with the balance flow channel 60, the drive nut 62 is arranged in the valve core body 61 and is threadedly connected with the screw rod 41, when the coil component is energized, the coil component drives the rotor component 42 to rotate, since the screw rod 41 is fixedly connected with the rotor component 42 through the guide 43, the rotor component 42 drives the screw rod 41 to rotate, under the drive of the screw rod 41, the drive nut 62 moves along the axial direction of the shell 1, realizing the opening or closing of the valve port 14 by the valve core 6.

[0098] It can be understood that the medium entering the balance flow channel 60 from the end of the balance flow channel 60 facing the valve port 14 can flow into the second sub-cavity 1012 through the third anti-rotation groove 611, and then flow into the second cavity 102 through the exhaust groove 27, so that the gas pressure in the second cavity 102, the gas pressure in the second sub-cavity 1012 and the gas pressure on the side of the valve core 6 away from the second cavity 102 are consistent, ensuring that the valve core 6 is always in a pressure balance state during switching, avoiding affecting the normal movement of the valve core 6 along the axial direction of the shell 1.

[0099] Further, referring to the accompanying drawings Figure 11 As shown, the outer peripheral wall of the valve core body 61 has a second anti-rotation lug 64 cooperating with the second anti-rotation groove 103, and the outer peripheral wall of the drive nut 62 has a third anti-rotation lug cooperating with the third anti-rotation groove 611, through the cooperation of the second anti-rotation lug 64 with the second anti-rotation groove 103 and the cooperation of the third anti-rotation lug with the third anti-rotation groove 611, the rotation of the valve core body 61 relative to the shell 1 is prevented, and the rotation of the drive nut 62 relative to the valve core body 61 is prevented, ensuring that the valve core body 61 can only move along the axial direction of the shell 1 and cannot rotate, ensuring that the drive nut 62 can only move along the axial direction of the shell 1 and cannot rotate, ensuring that the entire valve core 6 cannot rotate, thereby preventing the valve core 6 from being stuck during rotation, avoiding causing the valve core 6 to not move along the axial direction of the shell 1 due to rotation, thereby avoiding the electronic expansion valve 100 from failing, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100.

[0100] Further, referring to the accompanying drawings Figure 11As shown, the second anti-rotation lugs 64 are spaced apart along the circumferential direction of the valve core body 61, the second anti-rotation grooves 103 are one-to-one corresponding to the plurality of second anti-rotation lugs 64, the third anti-rotation lugs are spaced apart along the circumferential direction of the drive nut 62, and the third anti-rotation grooves 611 are one-to-one corresponding to the plurality of third anti-rotation lugs. Through the plurality of positions limiting between the valve core body 61 and the shell 1 and between the drive nut 62 and the valve core body 61, the valve core 6 can be limited at a plurality of positions spaced apart in the circumferential direction of the valve core 6, so as to avoid the rotation of the valve core 6 relative to the shell 1, ensure the movement of the valve core 6 along the circumferential direction of the shell 1, thereby avoiding the failure of the electronic expansion valve 100, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100. For example, the second anti-rotation lugs 64 can be two, three, four, five, or six spaced apart along the circumferential direction of the valve core body 61, the second anti-rotation grooves 103 can be two, three, four, five, or six one-to-one corresponding to the plurality of second anti-rotation lugs 64, the third anti-rotation lugs can be two, three, four, five, or six spaced apart along the circumferential direction of the drive nut 62, and the third anti-rotation grooves 611 can be two, three, four, five, or six one-to-one corresponding to the plurality of third anti-rotation lugs.

[0101] In a specific example, the second anti-rotation lugs 64 are two spaced apart along the circumferential direction of the valve core body 61, the two second anti-rotation lugs 64 are located on opposite sides of the valve core body 61, the second anti-rotation grooves 103 are two one-to-one corresponding to the two second anti-rotation lugs 64, the third anti-rotation lugs are two spaced apart along the circumferential direction of the drive nut 62, and the third anti-rotation grooves 611 are two one-to-one corresponding to the two third anti-rotation lugs. The valve core 6 can be limited at two positions spaced apart in the circumferential direction of the valve core 6, further avoiding the rotation of the valve core 6 relative to the shell 1, ensuring the movement of the valve core 6 along the axial direction of the shell 1, avoiding the failure of the electronic expansion valve 100, ensuring the reliability and stability of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100.

[0102] Or, refer to the accompanying Figure 14As shown, the third anti-rotation groove 611 is opposite and communicates with the second anti-rotation groove 103, the outer peripheral wall of the drive nut 62 has a second anti-rotation lug 64, the second anti-rotation lug 64 is simultaneously provided in the third anti-rotation groove 611 and the second anti-rotation groove 103, and the second anti-rotation lug 64 simultaneously cooperates with the second anti-rotation groove 103 and the third anti-rotation groove 611, so that the second anti-rotation lug 64 simultaneously prevents the valve core body 61 from rotating relative to the shell 1 and prevents the drive nut 62 from rotating relative to the valve core body 61, and the relative rotation between the drive nut 62, the valve core body 61 and the valve seat 11 is prevented, so that the valve core 6 is prevented from being stuck during rotation, and the electronic expansion valve 100 is prevented from being disabled due to rotation and not moving along the axial direction of the shell 1, so that the electronic expansion valve 100 is prevented from being disabled, the reliability and stability of the electronic expansion valve 100 are ensured, and the service life of the electronic expansion valve 100 is prolonged.

[0103] Further, with reference to the accompanying drawings Figure 15 As shown, the second anti-rotation lug 64 is spaced apart in the circumferential direction of the drive nut 62, the second anti-rotation groove 103 and the third anti-rotation groove 611 are both a plurality of one-to-one corresponding to the plurality of second anti-rotation lugs 64, and the valve core 6 can be positioned at a plurality of positions spaced apart in the circumferential direction of the valve core 6, so that the valve core 6 is prevented from rotating relative to the shell 1, and the movement of the valve core 6 along the circumferential direction of the shell 1 is ensured, so that the electronic expansion valve 100 is prevented from being disabled, the reliability and stability of the electronic expansion valve 100 are ensured, and the service life of the electronic expansion valve 100 is prolonged. For example, the second anti-rotation lug 64 can be two, three, four, five or six spaced apart in the circumferential direction of the drive nut 62, the second anti-rotation groove 103 can be two, three, four, five or six one-to-one corresponding to the plurality of second anti-rotation lugs 64, and the third anti-rotation groove 611 can be two, three, four, five or six one-to-one corresponding to the plurality of second anti-rotation lugs 64.

[0104] In one specific example, the second anti-rotation lug 64 is two spaced apart in the circumferential direction of the drive nut 62, the two second anti-rotation lugs 64 are located on opposite sides of the drive nut 62, the second anti-rotation groove 103 and the third anti-rotation groove 611 are both two one-to-one corresponding to the two second anti-rotation lugs 64, and the valve core 6 can be positioned at two positions spaced apart in the circumferential direction of the valve core 6, so that the valve core 6 is further prevented from rotating relative to the shell 1, and the movement of the valve core 6 along the axial direction of the shell 1 is ensured, so that the electronic expansion valve 100 is prevented from being disabled, the reliability and stability of the electronic expansion valve 100 are ensured, and the service life of the electronic expansion valve 100 is prolonged.

[0105] It should be noted that when the second anti-rotation lug 64 is located on the outer peripheral wall of the valve core body 61, and the outer peripheral wall of the drive nut 62 has a third anti-rotation lug that mates with the third anti-rotation groove 611, the second anti-rotation lug 64 and the third anti-rotation lug can mate with the second anti-rotation groove 103 and the third anti-rotation groove 611 respectively. This can relatively reduce the difficulty of aligning the second anti-rotation lug 64 with the second anti-rotation groove 103 and the third anti-rotation lug with the third anti-rotation groove 611, thereby reducing the assembly difficulty of the drive nut 62, the valve core body 61, and the valve seat 11. The assembly difficulty of the electronic expansion valve 100 is reduced. When the second anti-rotation lug 64 is provided on the outer peripheral wall of the drive nut 62, and the third anti-rotation groove 611 is opposite to and connected to the second anti-rotation groove 103, and the second anti-rotation lug 64 is simultaneously inserted into the third anti-rotation groove 611 and the second anti-rotation groove 103, it is only necessary to process the second anti-rotation lug 64 on the drive nut 62, without processing the anti-rotation lug on the outer peripheral wall of the valve core body 61. This can relatively reduce the production difficulty of the valve core 6 and reduce the production and processing difficulty of the electronic expansion valve 100.

[0106] It should be noted that, by providing a screw 41 in the axial direction (see attached diagram) Figure 2 The two threaded sections (as shown in direction a) are spaced apart and respectively engage with the stop nut 31 and the drive nut 62. By providing the stop bearing 33 and the drive bearing 5 spaced apart in the axial direction of the housing 1, the rotor component 42 can be stably controlled to rotate at the same height, ensuring effective transmission between the stator component and the rotor component 42, reducing the axial movement of the rotor component 42, reducing the length of the rotor component 42 in the axial direction of the housing 1, and reducing the cost of the electronic expansion valve 100.

[0107] Furthermore, the pitches of the two threads on the screw 41 can be different to meet different needs and achieve their respective functions. For example, when the stroke of the valve core 6 in the axial direction of the housing 1 is short, the thread on the screw 41 that mates with the stop nut 31 can be set to a large thread pitch to achieve the purpose of stopping. When the stroke of the valve core 6 in the axial direction of the housing 1 is long, in order to ensure the accuracy of the flow adjustment of the valve core 6 at the valve port 14, the thread on the screw 41 that mates with the drive nut 62 needs to be set to a small thread pitch. The thread on the screw 41 that mates with the stop nut 31 can be set to a small thread pitch, so that even if the stop nut 31 rotates many times, the axial displacement is still very small. When the stroke of the valve core 6 in the axial direction of the housing 1 is long, the accuracy of the flow adjustment of the valve core 6 at the valve port 14 is very high, and the opening and closing time requirement is very short, the thread on the screw 41 that mates with the drive nut 62 can use a double-start thread or a multi-start thread. This can increase the lead while keeping the pitch fine, thereby improving the flow adjustment accuracy and speeding up the valve opening time. The thread on the screw 41 that mates with the stop nut 31 can be adapted to the thread pitch according to the stroke.

[0108] In still further embodiments of the present application, referring to Figs. 1-3, the balance flow channel 60 comprises a first flow channel 601 and a second flow channel 602 arranged in sequence and in communication in the direction from the second cavity 102 to the first cavity 101, the inner diameter of the first flow channel 601 is smaller than that of the second flow channel 602, the drive nut 62 is located in the second flow channel 602, and the valve core 6 further comprises a second elastic member 63, which is arranged in the second flow channel 602, one end of the second elastic member 63 in the extension direction (direction a in Fig. 2) abuts against one end of the drive nut 62 facing the valve port 14, and the other end abuts against the inner bottom wall of the first flow channel 601, the second elastic member 63 is in a compressed state and is used to push the drive nut 62 to move in a direction away from the valve port 14. Figure 2 Figure 2 It should be noted that, referring to Figs. 1-3, the valve core body 61 comprises a body portion 612 and a stop portion 613, the body portion 612 extends along the axial direction of the housing 1, the body portion 612 defines the first flow channel 601 and the second flow channel 602, the third anti-rotation groove 611 is arranged on the peripheral wall of the body portion 612, the stop portion 613 is arranged at one end of the body portion 612 away from the valve port 14 and is fixedly connected with the body portion 612, the screw rod 41 is arranged in the stop portion 613, and the stop portion 613 is adapted to abut against one end of the drive nut 62 away from the valve port 14 to limit the movement of the drive nut 62 in a direction away from the valve port 14.

[0109] It should be noted that, referring to Figs. 1-3, the valve core body 61 comprises a body portion 612 and a stop portion 613, the body portion 612 extends along the axial direction of the housing 1, the body portion 612 defines the first flow channel 601 and the second flow channel 602, the third anti-rotation groove 611 is arranged on the peripheral wall of the body portion 612, the stop portion 613 is arranged at one end of the body portion 612 away from the valve port 14 and is fixedly connected with the body portion 612, the screw rod 41 is arranged in the stop portion 613, and the stop portion 613 is adapted to abut against one end of the drive nut 62 away from the valve port 14 to limit the movement of the drive nut 62 in a direction away from the valve port 14. Figure 2 In one specific example, referring to Figs. 1-3, the second anti-rotation lug 64 is arranged on the peripheral wall of the stop portion 613 and is used to cooperate with the second anti-rotation groove 103 of the valve seat 11, and the outer peripheral wall of the drive nut 62 has a third anti-rotation lug which only cooperates with the third anti-rotation groove 611, at this time, the stop portion 613 is used to limit the drive nut 62 in the axial direction of the housing 1 and to prevent the valve core 6 from rotating relative to the valve seat 11; in another specific example, referring to Figs. 1-3, the second anti-rotation lug 64 is arranged on the outer peripheral wall of the drive nut 62, and the second anti-rotation lug 64 is arranged in the third anti-rotation groove 611 and the second anti-rotation groove 103 at the same time, at this time, the stop portion 613 is only used to limit the drive nut 62 in the axial direction of the housing 1.

[0110] Figure 11 Figure 14

[0111] It should be noted that, referring to Figs. 1-3, the valve core body 61 comprises a body portion 612 and a stop portion 613, the body portion 612 extends along the axial direction of the housing 1, the body portion 612 defines the first flow channel 601 and the second flow channel 602, the third anti-rotation groove 611 is arranged on the peripheral wall of the body portion 612, the stop portion 613 is arranged at one end of the body portion 612 away from the valve port 14 and is fixedly connected with the body portion 612, the screw rod 41 is arranged in the stop portion 613, and the stop portion 613 is adapted to abut against one end of the drive nut 62 away from the valve port 14 to limit the movement of the drive nut 62 in a direction away from the valve port 14. Figure 2 ​​​​As shown, in the process that the valve core 6 closes the valve port 14, the screw rod 41 rotates, so that the driving nut 62 moves towards the direction close to the valve port 14, and since the second elastic member 63 is relatively hard, the second elastic member 63 is not compressed at this time, so that the valve core body 61, the second elastic member 63 and the driving nut 62 move together as a whole towards the direction close to the valve port 14, until the valve core body 61 blocks the valve port 14, and the valve core body 61 cannot continue to move, but under the driving of the driving assembly 4, the screw rod 41 continues to rotate, driving the driving nut 62 to continue to move towards the direction close to the valve port 14, compressing the second elastic member 63, generating a pre-tightening force, reserving a set opening pulse, so that the electronic expansion valve 100 can have enough sealing force to block the valve port 14 when power off or not running, avoiding medium leakage.

[0112] In the process that the valve core 6 opens the valve port 14, first, the second elastic member 63 needs to be restored, and a certain amount of idle stroke needs to be run, until the second elastic member 63 drives the driving nut 62 to abut against the end face of the stop portion 613 facing the valve port 14, so as to drive the valve core body 61 to move towards the direction away from the valve port 14, thereby guaranteeing the reliability and stability of the sealing of the valve port 14, reducing the failure risk of the electronic expansion valve 100, and prolonging the service life of the electronic expansion valve 100.

[0113] Other configurations and operations of the electronic expansion valve 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0114] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description 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 appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or features of the embodiments or examples described in the present specification without contradiction.

[0115] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electronic expansion valve characterized by, include: A housing (1) having a cavity (10); A bearing support (2) is disposed in the cavity (10) and extends along the axial direction of the housing (1). The bearing support (2) has a first anti-rotation groove (211), a first limiting member (212), and a second limiting member (222). The first anti-rotation groove (211) is disposed on the peripheral wall of the bearing support (2) and extends along the axial direction of the housing (1). The first limiting member (212) and the second limiting member (222) are respectively located at both ends of the extension direction of the first anti-rotation groove (211). A stop (3) is provided in the bearing support (2) and is movable in the axial direction of the housing (1). The outer peripheral wall of the stop (3) has a first anti-rotation lug (321) that cooperates with the first anti-rotation groove (211). The first anti-rotation lug (321) is located between the first limiting member (212) and the second limiting member (222). The first limiting member (212) and the second limiting member (222) are both used to restrict the stop (3) from moving in the axial direction of the housing (1). A drive assembly (4) is disposed on the housing (1) and includes a screw (41). The screw (41) extends along the axial direction of the housing (1). The screw (41) passes through the stop member (3) and is threadedly connected to the stop member (3) for driving the stop member (3) to move along the axial direction of the housing (1).

2. The electronic expansion valve according to claim 1, characterized in that The stop member (3) includes: Stop nut (31), the stop nut (31) is provided in the bearing support (2), and the stop nut (31) is threadedly connected to the screw (41); A stop ring (32) is sleeved on the stop nut (31). The first anti-rotation lug (321) is provided on the outer peripheral wall of the stop ring (32). The stop ring (32) and the stop nut (31) are rotatably connected or fixedly connected.

3. The electronic expansion valve according to claim 2, wherein The stop ring (32) is rotatably connected to the stop nut (31), and the stop member (3) further includes: A stop bearing (33) is disposed between the stop nut (31) and the stop ring (32).

4. The electronic expansion valve according to claim 2, wherein The stop nut (31) has a rotation notch (311) at one axial end.

5. The electronic expansion valve according to claim 1, wherein The stop (3) is a single piece.

6. The electronic expansion valve according to claim 1, wherein The first anti-rotation lug (321) is a plurality of lugs spaced apart along the circumferential direction of the stop (3), and the first anti-rotation groove (211) is a plurality of lugs corresponding one-to-one with the plurality of the first anti-rotation lugs (321).

7. The electronic expansion valve according to claim 1, wherein The bearing support (2) includes: Support body (21), the support body (21) extends along the axial direction of the housing (1), the first anti-rotation groove (211) is provided on the peripheral wall of the support body (21), and one end face of the first anti-rotation groove (211) along the extension direction of the housing (1) is configured as the first limiting member (212). A stop limiting ring (22) is located in the support body (21) and spaced from the first limiting piece (212), and has a through hole (221) on the stop limiting ring (22), the screw rod (41) is arranged in the through hole (221), and an end face of the stop limiting ring (22) facing the first limiting piece (212) is configured as the second limiting piece (222).

8. The electronic expansion valve according to claim 1, wherein At least one of the two ends of the stop piece (3) in the axial direction of the shell (1) is provided with a first elastic piece (34), the first elastic piece (34) extends in the axial direction of the shell (1), and an end of the first elastic piece (34) away from the stop piece (3) is abutted against or connected to the first inner wall of the bearing support (2), so that the first elastic piece (34) is used for driving the stop piece (3) to move in a direction away from the first inner wall.

9. The electronic expansion valve according to claim 8, characterized in that The first elastic piece (34) is a spring, and the spring and the bearing support (2) are separate parts.

10. The electronic expansion valve according to claim 8, wherein The first elastic piece (34) and the bearing support (2) are an integral part, the first elastic piece (34) is formed as a bending part arranged on the first inner wall and extending towards the stop piece (3), at least part of the bending part has an included angle with the axis of the bearing support (2), and an end of the bending part away from the first inner wall is adapted to abut against the stop piece (3).

11. The electronic expansion valve according to claim 10, wherein The circumferential wall of the bearing support (2) is further provided with a avoiding groove (213), the avoiding groove (213) extends in the axial direction of the shell (1) and is arranged opposite to the bending part, the avoiding groove (213) is spaced from the first anti-rotation groove (211) in the circumferential direction of the bearing support (2), and the outer circumferential wall of the stop piece (3) is further provided with a stop lug (35) matched with the avoiding groove (213), the stop lug (35) is spaced from the first anti-rotation lug (321) in the circumferential direction of the stop piece (3), and the stop lug (35) is adapted to abut against the bending part.

12. The electronic expansion valve according to claim 1, wherein Further comprising: A driving bearing (5) is arranged between the screw rod (41) and the bearing support (2).

13. The electronic expansion valve of claim 1, wherein, The shell (1) includes a valve seat (11) and a sleeve (12) arranged and connected in the axial direction of the shell (1), the valve seat (11) defines a first cavity (101), the sleeve (12) defines a second cavity (102), part of the bearing support (2), part of the drive assembly (4) and the stopper (3) are located in the second cavity (102), the end of the bearing support (2) facing the first cavity (101) has a guide part (25), a turned edge (26) and an exhaust groove (27), the guide part (25) is located in the valve seat (11) and extends in the axial direction of the bearing support (2), the turned edge (26) extends towards the radial outside of the bearing support (2), and the turned edge (26) is connected with the end face of the valve seat (11) close to the sleeve (12), the inner bottom wall of the exhaust groove (27) is located on the side of the turned edge (26) away from the first cavity (101), in the circumferential direction of the bearing support (2), the exhaust groove (27) is located between the guide part (25) and the turned edge (26) for communicating the first cavity (101) and the second cavity (102).

14. The electronic expansion valve according to claim 13, wherein The guide part (25) is a plurality of intervals arranged in the circumferential direction of the bearing support (2), the turned edge (26) is a plurality of one-to-one corresponding to the plurality of guide parts (25), the plurality of turned edges (26) and the plurality of guide parts (25) are staggered, and the exhaust groove (27) is arranged between any adjacent guide part (25) and turned edge (26).

15. The electronic expansion valve of claim 1, wherein, The cavity (10) includes a first cavity (101) and a second cavity (102) arranged in the axial direction of the cavity (10), the shell (1) further has a communication hole (13) and a valve port (14) communicating with the first cavity (101), the communication hole (13) is arranged on the peripheral wall of the shell (1), the valve port (14) is arranged at the end of the first cavity (101) away from the second cavity (102), part of the bearing support (2), part of the drive assembly (4) and the stopper (3) are located in the second cavity (102), and the electronic expansion valve (100) further comprises: A valve core (6) is arranged in the first cavity (101) and threadedly connected with the screw rod (41), the valve core (6) is movable in the axial direction of the shell (1) to open or close the valve port (14).

16. The electronic expansion valve according to claim 15, wherein The inner wall of the first cavity (101) has a second anti-rotation groove (103) extending along the axial direction of the cavity (10), the valve core (6) comprises a valve core body (61) and a drive nut (62), the valve core body (61) has a third anti-rotation groove (611) extending along the axial direction of the cavity (10), the drive nut (62) is arranged in the valve core body (61) and is threadedly connected with the screw rod (41), The outer peripheral wall of the valve core body (61) has a second anti-rotation lug (64) matched with the second anti-rotation groove (103), and the outer peripheral wall of the drive nut (62) has a third anti-rotation lug matched with the third anti-rotation groove (611); Or, the third anti-rotation groove (611) is opposite to and communicates with the second anti-rotation groove (103), the outer peripheral wall of the drive nut (62) has a second anti-rotation lug (64), and the second anti-rotation lug (64) is arranged in the third anti-rotation groove (611) and the second anti-rotation groove (103) simultaneously.

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