Electronic expansion valve
By setting an inner spiral groove on the limit sleeve of the electronic expansion valve and setting the stop ring to move in the inner spiral groove, the problem of the stop ring being susceptible to force deformation and disengagement is solved, achieving higher stability and reliability, and reducing noise.
Patent Information
- Application Number
- CN202420540889.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The stop ring in existing electronic expansion valves is prone to deformation and disengagement under stress, resulting in the valve losing its stability and reliability.
An electronic expansion valve is designed. By setting an inner spiral groove on the inner wall of the limit sleeve and movably setting the stop ring in the inner spiral groove, the guide plate cooperates with the stop ring stop to ensure that the stop ring moves inside the limit sleeve and avoiding deformation and disengagement by force.
It effectively prevents the stop ring from being deformed and disengaged by force, improves the stability and reliability of the electronic expansion valve, and reduces noise transmission, which has a noise reduction effect.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve. Background Art
[0002] The electronic expansion valve uses a stop ring and a guide plate to stop. The stop ring is sleeved on the outside of the small shaft or nut, and the stop ring moves along the outside of the small shaft or nut. When the stop ring runs to the end of the small shaft or nut, the stop ring and the small shaft or nut no longer move relative to each other, and the stop ring cooperates with the guide plate to stop the valve needle mechanism. The stop ring is sleeved on the outside of the small shaft or nut. When the stop ring cooperates with the guide plate to stop, the stop ring is prone to deformation and dislocation. Therefore, an electronic expansion valve that can prevent the stop ring from being deformed and dislocated due to force is needed. Utility Model Content
[0003] The utility model provides an electronic expansion valve to solve the problem in the prior art that a stop ring is deformed and falls out due to stress.
[0004] In order to solve the above problems, the utility model provides an electronic expansion valve, comprising: a valve body structure, the valve body structure has a valve port; a valve core assembly, the valve core assembly moves in the valve body structure to adjust the opening of the valve port; a rotor assembly, and the valve core assembly is fixedly connected to drive the axial movement of the valve core assembly; a limit sleeve, the limit sleeve is movably arranged in the valve body structure, the limit sleeve is fixedly connected to the rotor assembly, and the inner wall of the limit sleeve is provided with an inner spiral groove; a guide plate, the guide plate is fixedly connected to the valve body structure; a stop ring, the stop ring is movably arranged in the inner spiral groove, and the guide plate cooperates with the stop ring for stopping.
[0005] Furthermore, a stop step is provided on the inner wall of the limiting sleeve, and the stop step is located at an end of the inner spiral groove away from the valve port or an end of the inner spiral groove close to the valve port, and the stop step limits the stop ring.
[0006] Furthermore, the rotor assembly includes a rotor and a rotor connecting plate, the rotor is movably arranged in the valve body structure, the rotor connecting plate is fixedly connected to the rotor, and the end surface of the rotor connecting plate is fixedly connected to the limit sleeve.
[0007] Furthermore, the rotor connecting plate includes a plate body and a boss, the boss is arranged at one end of the plate body close to the limiting sleeve, and the boss cooperates with the stop ring.
[0008] Furthermore, the limiting sleeve includes a sleeve and a plurality of bosses, the plurality of bosses are arranged along the circumference of the sleeve, the rotor connecting plate is provided with a plurality of through holes, the through holes are limitedly matched with the bosses, and the plurality of bosses correspond one to one with the plurality of through holes.
[0009] Furthermore, the stop ring includes a spiral ring and an inwardly folded short rod arranged at one end of the spiral ring, and the inwardly folded short rod is limitedly matched with the guide plate.
[0010] Further, the stop ring has one end of the inwardly folded short rod toward the end of the limit sleeve away from the valve port, and the other end of the stop ring toward the end of the limit sleeve close to the valve port; or, the stop ring has one end of the inwardly folded short rod toward the end of the limit sleeve close to the valve port, and the other end of the stop ring toward the end of the limit sleeve away from the valve port.
[0011] Furthermore, the electronic expansion valve also includes a rotor connecting plate, which is fixedly connected to the limit sleeve, and the rotor connecting plate is movably arranged in the valve body structure, and one end of the valve core assembly close to the guide plate is fixedly connected to the rotor connecting plate.
[0012] Furthermore, the electronic expansion valve also includes a limit plate, the rotor connecting plate has a limit groove, the limit plate and the limit groove are limited and cooperated to limit the limit plate circumferentially; the end of the valve core assembly away from the valve port is arranged through the rotor connecting plate, the end of the valve core assembly passing through the rotor connecting plate is fixedly connected to the limit plate, and the valve core assembly has a limit step, which abuts against the end of the rotor connecting plate close to the valve port.
[0013] Further, the valve body structure includes a valve tube and a valve seat connected to each other, and the valve seat has a valve port; or, the valve body structure includes a valve tube, a connector and a valve seat connected in sequence, and the valve seat has a valve port.
[0014] Furthermore, the valve tube includes a straight tube and an inner reduction tube connected to each other. The inner reduction tube is arranged at the end of the straight tube away from the valve seat. The inner diameter of the inner reduction tube is smaller than the inner diameter of the straight tube. The electronic expansion valve also includes an inner sleeve. The inner sleeve is coaxially fixedly connected to the inner reduction tube, and the inner sleeve is integrally formed with the guide plate.
[0015] Furthermore, the inner sleeve includes a tube body and a plurality of convex bubbles, the plurality of convex bubbles are arranged at one end of the tube body away from the valve seat, the convex bubbles are used for spot welding the tube body and the inner shrink tube, and the tube body has a gap to avoid the guide plate.
[0016] The technical scheme of the utility model is applied to provide an electronic expansion valve, including: a valve body structure, the valve body structure has a valve port; a valve core assembly, the valve core assembly moves in the valve body structure to adjust the opening of the valve port; a rotor assembly, fixedly connected to the valve core assembly to drive the axial movement of the valve core assembly; a limit sleeve, the limit sleeve is movably arranged in the valve body structure, the limit sleeve is fixedly connected to the rotor assembly, and the inner wall of the limit sleeve is provided with an inner spiral groove; a guide plate, the guide plate is fixedly connected to the valve body structure; a stop ring, the stop ring is movably arranged in the inner spiral groove, and the guide plate and the stop ring stop cooperate. With this scheme, the valve core assembly moves in the valve body structure to adjust the opening of the valve port to control the flow rate of the fluid; the limit sleeve is fixedly connected to the rotor assembly, the limit sleeve and the valve core assembly move synchronously in the valve body structure with the rotor assembly, the stop ring moves along the inner spiral groove of the limit sleeve, and when the stop ring runs to the two ends of the limit sleeve, the guide plate stops the limit stop ring, so that the limit sleeve stops moving. By arranging the inner spiral groove on the limiting sleeve, the stop ring moves inside the limiting sleeve, thereby preventing the stop ring from being deformed by force and escaping from the limiting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0018] Figure 1 A schematic diagram of the structure of an electronic expansion valve provided in an embodiment of the utility model is shown;
[0019] Figure 2 Shows Figure 1 A schematic diagram of the structure of the limit sleeve of the electronic expansion valve;
[0020] Figure 3 Shows Figure 2 A cross-sectional view of the limit sleeve in FIG.
[0021] Figure 4 Shows Figure 1 A schematic diagram of the structure of the rotor connecting plate of the electronic expansion valve;
[0022] Figure 5 Shows Figure 1 A schematic diagram of the structure of the stop ring of the electronic expansion valve;
[0023] Figure 6 Shows Figure 1 Schematic diagram of the structure of the inner sleeve of the electronic expansion valve.
[0024] The above drawings include the following reference numerals:
[0025] 10. Valve pipe; 11. Straight pipe; 12. Inner shrink pipe;
[0026] 20. Valve seat;
[0027] 30. Valve core assembly;
[0028] 40. Limit sleeve; 41. Inner spiral groove; 42. Stop step; 43. Sleeve; 44. Boss;
[0029] 50. Guide plate;
[0030] 60. Stop ring; 61. Spiral ring; 62. Inwardly folded short rod;
[0031] 71. rotor; 72. limit plate;
[0032] 80. rotor connecting plate; 81. through hole; 82. plate body; 83. boss; 84. limiting groove;
[0033] 90. Inner casing; 91. Pipe body; 92. Bubble. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0035] like Figures 1 to 6 As shown, an embodiment of the utility model provides an electronic expansion valve, including: a valve body structure, the valve body structure has a valve port; a valve core assembly 30, the valve core assembly 30 moves in the valve body structure to adjust the opening of the valve port; a rotor assembly, and the valve core assembly 30 is fixedly connected to drive the axial movement of the valve core assembly 30; a limit sleeve 40, the limit sleeve 40 is movably arranged in the valve body structure, the limit sleeve 40 is fixedly connected to the rotor assembly, the valve core assembly 30 is fixedly connected to the rotor assembly, and the inner wall of the limit sleeve 40 is provided with an inner spiral groove 41; a guide plate 50, the guide plate 50 is fixedly connected to the valve body structure; a stop ring 60, the stop ring 60 is movably arranged in the inner spiral groove 41, and the guide plate 50 cooperates with the stop ring 60 for stopping.
[0036] Among them, the valve body structure includes a valve tube 10 and a valve seat 20, the valve tube 10 and the valve seat 20 are fixedly connected, and the valve port is arranged in the valve seat 20; in an embodiment not shown in the figure in the present application, the valve body structure also includes a connecting piece, and the valve tube 10, the connecting piece and the valve seat 20 are connected in sequence.
[0037] With this solution, the fluid enters or flows out through the valve port of the valve seat 20, and the valve core assembly 30 moves in the valve body structure to control the opening and closing of the electronic expansion valve or adjust the opening of the valve port to control the flow of the fluid; the limit sleeve 40 is fixedly connected to the rotor assembly, the valve core assembly 30 is fixedly connected to the rotor assembly, the limit sleeve 40 and the valve core assembly 30 move synchronously in the valve body structure along with the rotor assembly, and the stop ring 60 moves along the inner spiral groove 41 of the limit sleeve 40. When the stop ring 60 runs to the two ends of the limit sleeve 40, the guide plate 50 stops the limit stop ring 60, and the stop ring 60 cooperates with the limit sleeve 40 to stop the limit sleeve 40, so that the limit sleeve 40 stops moving. By setting an internal thread on the limit sleeve 40, the stop ring 60 moves inside the limit sleeve 40, thereby preventing the stop ring 60 from being deformed by force and escaping from the limit sleeve 40. Furthermore, by limiting the stop ring 60 inside the limiting sleeve 40, the noise generated when the stopper contacts is effectively prevented from being transmitted to the outside, thus achieving a noise reduction effect.
[0038] The valve core assembly 30 may be an integral structure or a split structure. When the valve core assembly 30 is a split structure, it may include a screw, a valve needle sleeve, a valve needle, an elastic member, etc. When the valve core assembly 30 is an integral structure, the valve core assembly 30 is a screw with threads.
[0039] like Figure 3 As shown, the inner wall of the limiting sleeve 40 is provided with a stop step 42 , which is located at the end of the inner spiral groove 41 away from the valve port or the end of the inner spiral groove 41 close to the valve port, and the stop step 42 limits the stop ring 60 .
[0040] In this arrangement, the stop step 42 is connected to one end of the inner spiral groove 41, and the stop ring 60 is limited by the stop step 42, so that when the stop ring 60 moves to the end of the limit sleeve 40, it stops and cooperates with the stop step 42, and the stop ring 60 and the limit sleeve 40 do not undergo relative displacement.
[0041] like Figure 1 As shown, the rotor assembly includes a rotor 71 and a rotor connecting plate 80 . The rotor 71 is movably disposed in the valve tube 10 . The rotor connecting plate 80 is fixedly connected to the rotor 71 . The end surface of the rotor connecting plate 80 is fixedly connected to the limiting sleeve 40 .
[0042] In this way, the rotor connecting plate 80 fixedly connects the rotor 71 and the limiting sleeve 40, so that the rotor 71 rotates synchronously with the limiting sleeve 40. During processing, the rotor connecting plate 80 is injection-molded with the rotor 71 as an insert.
[0043] like Figure 4 As shown, the rotor connecting plate 80 includes a plate body 82 and a boss 83 . The boss 83 is disposed at one end of the plate body 82 close to the limiting sleeve 40 , and the boss 83 is engaged with the stop ring 60 .
[0044] In this way, the boss is set at one end of the plate body 82 close to the limit sleeve 40. When the stop ring 60 moves to the end of the limit sleeve 40 close to the rotor connecting plate 80, the stop ring 60 contacts the boss 83, and the boss 83 stops the stop ring 60, so that the stop ring 60 and the limit sleeve 40 no longer move relative to each other.
[0045] like Figure 3 As shown, the limiting sleeve 40 includes a sleeve 43 and a plurality of bosses 44 , the plurality of bosses 44 are arranged along the circumference of the sleeve 43 , the rotor connecting plate 80 is provided with a plurality of through holes 81 , the through holes 81 are limitedly matched with the bosses 44 , and the plurality of bosses 44 correspond one to one with the plurality of through holes 81 .
[0046] In this way, the plurality of bosses 44 correspond to the plurality of through holes 81 one by one, and the limiting sleeve 40 is connected to the rotor connecting plate 80. Specifically, the limiting sleeve 40 and the rotor connecting plate 80 are both injection molded, and of course the rotor connecting plate 80 can also be made of metal, and the bosses 44 pass through the through holes 81 and are connected to the end surface of the rotor connecting plate 80 by hot riveting.
[0047] like Figure 5 As shown, the stop ring 60 includes a spiral ring 61 and an inwardly folded short rod 62 arranged at one end of the spiral ring 61 , and the inwardly folded short rod 62 is limitedly matched with the guide plate 50 .
[0048] In this way, the spiral ring 61 moves along the inner spiral groove 41, and an inner folded short rod 62 is provided at the end of the spiral ring 61, so that the inner folded short rod 62 is limitedly matched with the guide plate 50. When the stop ring 60 moves to the end of the limit sleeve 40, the stop ring 60 is stopped and matched with the limit sleeve 40, and the inner folded short rod 62 is stopped and matched with the guide plate, so that the limit sleeve 40 stops rotating. Specifically, the stop ring 60 and the stop step 42 at the upper end of the limit sleeve 40 are lower limited, that is, fully closed, and the stop ring 60 and the boss 83 on the rotor connecting plate 80 at the lower end of the limit sleeve 40 are upper limited, that is, fully open.
[0049] Further, the stop ring 60 has one end of an inwardly folded short rod 62 toward an end of the limiting sleeve 40 away from the valve port, and the other end of the stop ring 60 toward an end of the limiting sleeve 40 close to the valve port; or, the stop ring 60 has one end of an inwardly folded short rod 62 toward an end of the limiting sleeve 40 close to the valve port, and the other end of the stop ring 60 toward an end of the limiting sleeve 40 away from the valve port.
[0050] In this way, when the stop ring 60 has an end of the inner folded short rod 62 toward the end of the limit sleeve 40 away from the valve port, the inner folded short rod 62 and the end of the guide plate 50 away from the valve port are stopped and cooperated. At this time, the inner folded short rod 62 and the stop step 42 at the upper end of the limit sleeve 40 are lowered, and the other end of the stop ring 60 and the boss 83 on the rotor connecting plate 80 at the lower end of the limit sleeve 40 are uppered; when the stop ring 60 has an end of the inner folded short rod 62 toward the end of the limit sleeve 40 close to the valve port, the inner folded short rod 62 and the end of the guide plate 50 close to the valve port are stopped and cooperated. At this time, the inner folded short rod 62 and the boss 83 on the rotor connecting plate 80 at the lower end of the limit sleeve 40 are uppered, and the other end of the stop ring 60 and the stop step 42 at the upper end of the limit sleeve 40 are lowered.
[0051] like Figure 4 As shown, the electronic expansion valve also includes a rotor assembly, which includes a rotor 71 and a rotor connecting plate 80, the limit sleeve 40 is fixedly connected to the rotor assembly, and one end of the valve core assembly 30 close to the guide plate 50 is fixedly connected to the rotor assembly; specifically, the rotor connecting plate 80 is fixedly connected to the limit sleeve 40, the rotor connecting plate 80 is movably arranged in the valve tube 10, and one end of the valve core assembly 30 close to the guide plate 50 is fixedly connected to the rotor connecting plate 80.
[0052] With such arrangement, the valve core assembly 30 is fixedly connected to the rotor connecting plate 80 , so that the valve core assembly 30 moves synchronously with the rotor connecting plate 80 under the drive of the rotor 71 , thereby realizing the movement of the valve core assembly 30 to open and close the valve port or adjust the opening.
[0053] like Figure 1 As shown, the electronic expansion valve also includes a limit plate 72, and the rotor connecting plate 80 has a limit groove 84. The limit plate 72 cooperates with the limit groove 84 to limit the limit plate 72 circumferentially; the end of the valve core assembly 30 away from the valve seat 20 passes through the rotor connecting plate 80, and the end of the valve core assembly 30 that passes through the rotor connecting plate 80 is fixedly connected to the limit plate 72, and the valve core assembly 30 has a limit step, which abuts against the end of the rotor connecting plate 80 close to the valve port.
[0054] In this configuration, the limit plate 72 and the limit groove 84 are limited and matched, and the limit plate 72 and the limit groove 84 are special-shaped limit, so that the limit plate 72 cannot rotate in the limit groove 84, so as to limit the limit plate 72 circumferentially. The end of the valve core assembly 30 away from the valve seat 20 passes through the rotor connecting plate 80 and is fixedly connected to the limit plate 72, so that the valve core assembly 30 cannot rotate relative to the rotor connecting plate 80, so that the valve core assembly 30 and the rotor connecting plate 80 rotate synchronously. The limit step abuts against the end of the rotor connecting plate 80 close to the valve seat 20, and the end of the valve core assembly 30 passing through the rotor connecting plate 80 is fixedly connected to the limit plate 72, so that the valve core assembly 30 cannot be axially displaced relative to the rotor connecting plate 80, so that the valve core assembly 30 and the rotor connecting plate 80 move synchronously.
[0055] In a specific embodiment of the present invention, the valve core assembly 30 and the limiting plate 72 are fixedly connected by welding.
[0056] Optionally, the diameter of the end of the valve core assembly 30 passing through the rotor connecting plate 80 can be enlarged, and the limiting plate 72 and the limiting groove 84 can be arranged at the end of the rotor connecting plate 80 away from the valve port.
[0057] like Figure 1 As shown, the valve tube 10 includes a straight tube 11 and an inner shrinkage tube 12 that are connected to each other. The inner shrinkage tube 12 is arranged at one end of the straight tube 11 away from the valve seat 20. The inner diameter of the inner shrinkage tube 12 is smaller than the inner diameter of the straight tube 11. The electronic expansion valve also includes an inner sleeve 90, which is coaxially fixedly connected to the inner shrinkage tube 12, and the inner sleeve 90 is integrally formed with the guide plate 50.
[0058] In this way, the inner diameter of the inner shrink tube 12 is smaller than the inner diameter of the straight tube 11, making it easier to install the inner sleeve 90, and it is easier to put the inner sleeve 90 into the inner shrink tube 12. The inner sleeve 90 is coaxially fixedly connected to the inner shrink tube 12, and the inner sleeve 90 is integrally formed with the guide piece 50, which increases the coaxiality and strengthens the strength of the connection between the guide piece 50 and the inner sleeve 90, effectively improving the problem of the guide piece 50 being skewed and affecting the use.
[0059] In a specific embodiment of the present invention, the inner sleeve 90 and the guide plate 50 are integrally formed by a punching and stretching process.
[0060] like Figure 6 As shown, the outer wall of the inner sleeve 90 is tightly matched with the inner wall of the inner shrinkage tube 12; the inner sleeve 90 includes a tube body 91 and a plurality of convex bubbles 92, and the plurality of convex bubbles 92 are arranged at one end of the tube body 91 away from the valve seat 20, and the convex bubbles 92 are used for spot welding the tube body 91 and the inner shrinkage tube 12, and the tube body 91 has a gap to avoid the guide plate 50.
[0061] In this arrangement, the convex bubble 92 is arranged at the end of the tube body 91 away from the valve seat 20, which facilitates spot welding of the tube body 91 and the inner shrinkage tube 12, thereby increasing the strength of the connection between the tube body 91 and the inner shrinkage tube 12.
[0062] The electronic expansion valve also includes a nut, which is fixedly connected to the valve seat 20 and threadedly matched with the valve core assembly 30 so that the valve core assembly 30 can move axially relative to the nut.
[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0066] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
Claims
1. An electronic expansion valve, characterized in that: include: A valve body structure, the valve body structure having a valve port; A valve core assembly (30), wherein the valve core assembly (30) moves within the valve body structure to adjust the opening of the valve port; A rotor assembly fixedly connected to the valve core assembly (30) to drive the valve core assembly (30) to move axially; A limiting sleeve (40), the limiting sleeve (40) being movably arranged in the valve body structure, the limiting sleeve (40) being fixedly connected to the rotor assembly, and the inner wall of the limiting sleeve (40) being provided with an inner spiral groove (41); A guide plate (50), wherein the guide plate (50) is fixedly connected to the valve body structure; A stop ring (60) is movably disposed in the inner spiral groove (41), and the guide plate (50) is engaged with the stop ring (60) in a stop manner.
2. The electronic expansion valve according to claim 1, characterized in that: The inner wall of the limiting sleeve (40) is provided with a stop step (42), and the stop step (42) is located at an end of the inner spiral groove (41) away from the valve port or at an end of the inner spiral groove (41) close to the valve port, and the stop step (42) limits the stop ring (60).
3. The electronic expansion valve according to claim 1, characterized in that: The rotor assembly comprises a rotor (71) and a rotor connecting plate (80); the rotor (71) is movably arranged in the valve body structure; the rotor connecting plate (80) is fixedly connected to the rotor (71); and the end surface of the rotor connecting plate (80) is fixedly connected to the limiting sleeve (40).
4. The electronic expansion valve according to claim 3, characterized in that: The rotor connecting plate (80) comprises a plate body (82) and a boss (83); the boss (83) is arranged at one end of the plate body (82) close to the limiting sleeve (40); and the boss (83) is engaged with the stop ring (60) for stopping.
5. The electronic expansion valve according to claim 3, characterized in that: The limiting sleeve (40) comprises a sleeve (43) and a plurality of bosses (44), wherein the plurality of bosses (44) are arranged along the circumference of the sleeve (43), and the rotor connecting plate (80) is provided with a plurality of through holes (81), wherein the through holes (81) are limitedly matched with the bosses (44), and the plurality of bosses (44) correspond one to one with the plurality of through holes (81).
6. The electronic expansion valve according to claim 1, characterized in that: The stop ring (60) comprises a spiral ring (61) and an inwardly folded short rod (62) arranged at one end of the spiral ring (61), and the inwardly folded short rod (62) is limitedly matched with the guide plate (50).
7. The electronic expansion valve according to claim 6, characterized in that: The stop ring (60) has one end of the inwardly folded short rod (62) facing toward one end of the limiting sleeve (40) away from the valve port, and the other end of the stop ring (60) facing toward one end of the limiting sleeve (40) close to the valve port; or, The stop ring (60) comprises an end of the inwardly folded short rod (62) facing toward an end of the limiting sleeve (40) close to the valve port, and the other end of the stop ring (60) facing toward an end of the limiting sleeve (40) away from the valve port.
8. The electronic expansion valve according to claim 1, characterized in that: The electronic expansion valve further comprises a rotor connecting plate (80), the rotor connecting plate (80) being fixedly connected to the limiting sleeve (40), the rotor connecting plate (80) being movably arranged in the valve body structure, and one end of the valve core assembly (30) close to the guide plate (50) being fixedly connected to the rotor connecting plate (80).
9. The electronic expansion valve according to claim 8, characterized in that: The electronic expansion valve also includes a limit plate (72), the rotor connecting plate (80) has a limit groove (84), and the limit plate (72) cooperates with the limit groove (84) to limit the limit plate (72) in a circumferential direction; the end of the valve core assembly (30) away from the valve port passes through the rotor connecting plate (80), and the end of the valve core assembly (30) passing through the rotor connecting plate (80) is fixedly connected to the limit plate (72), and the valve core assembly (30) has a limit step, and the limit step abuts against the end of the rotor connecting plate (80) close to the valve port.
10. The electronic expansion valve according to claim 1, characterized in that: The valve body structure comprises a valve tube (10) and a valve seat (20) connected to each other, and the valve seat (20) has the valve port; or, The valve body structure comprises a valve pipe (10), a connecting piece and a valve seat (20) which are connected in sequence, and the valve seat (20) has the valve port.
11. The electronic expansion valve according to claim 10, characterized in that: The valve tube (10) comprises a straight tube (11) and an inner shrinkage tube (12) which are connected to each other. The inner shrinkage tube (12) is arranged at one end of the straight tube (11) away from the valve seat (20). The inner diameter of the inner shrinkage tube (12) is smaller than the inner diameter of the straight tube (11). The electronic expansion valve also comprises an inner sleeve (90). The inner sleeve (90) is coaxially fixedly connected to the inner shrinkage tube (12). The inner sleeve (90) and the guide plate (50) are integrally formed.
12. The electronic expansion valve according to claim 11, characterized in that: The inner sleeve (90) comprises a tube body (91) and a plurality of convex bubbles (92). The plurality of convex bubbles (92) are arranged at one end of the tube body (91) away from the valve seat (20). The convex bubbles (92) are used to spot weld the tube body (91) and the inner shrink tube (12). The tube body (91) has a notch for avoiding the guide plate (50).