Electronic expansion valve and refrigerating system
By using metal materials and limit structure design, the accuracy reduction caused by wear of stop seat in the electronic expansion valve is solved, and the movement accuracy and service life of the valve core assembly are improved.
Patent Information
- Application Number
- CN202323254140.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-11-30
AI Technical Summary
In existing electronic expansion valves, wear of the stop seat causes the movement accuracy of the sliding nut to decrease, affecting the movement accuracy of the valve core assembly.
The track part and the stop seat are made of metal materials. The sliding cooperation between the track part and the stop part improves wear resistance and movement accuracy, and the movement of the track part is restricted through the design of the limit projection and the stop projection to ensure that the Slide accurately.
It improves the service life and movement accuracy of the electronic expansion valve, reduces wear, and enhances the matching accuracy of the valve core assembly.
Smart Images
Figure CN222165246U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of valve body technology, and in particular to an electronic expansion valve and a refrigeration system. Background Art
[0002] The electronic expansion valve is used as a throttling element to adjust the on-off and flow rate of the fluid. The electronic expansion valve includes a rotor assembly, a screw rod, a valve core assembly and a stop seat. The rotor assembly drives the screw rod to rotate spirally, and a part of the screw rod is provided with an external thread. The screw rod is threadedly connected to the valve core assembly, and the valve core assembly is limitedly connected to the stop seat. When the rotor assembly drives the screw rod to rotate, the valve core assembly only moves up and down along the valve axis. The stop seat is made of plastic.
[0003] With this solution, the sliding friction between the valve core assembly and the stop seat is relatively large when the valve core assembly moves up and down. Over time, the stop seat will wear more and more, which will affect the movement accuracy of the valve core assembly. Utility Model Content
[0004] Based on this, it is necessary to provide an electronic expansion valve and a refrigeration system to solve the problem that the movement accuracy of the sliding nut decreases due to increasing wear of the stop seat.
[0005] The electronic expansion valve provided in the present application includes a rotor assembly, a screw rod, a valve core assembly and a valve seat assembly; the valve seat assembly is provided with a valve mouth portion, and the rotor assembly can drive the valve core assembly to move toward or away from the valve mouth portion through the screw rod. The electronic expansion valve also includes a stop seat, which is sleeved outside the screw rod and fixedly connected to the valve seat assembly. The stop seat includes a stop portion and a track portion, the track portion is a metal part and is connected to one end of the stop portion, and the track portion of the valve core assembly slides along a preset axial direction.
[0006] In one embodiment, the track portion is provided with a slide rail arranged along a preset axial direction, and the stop portion is provided with a limiting protrusion corresponding to the slide rail. The limiting protrusion is located inside the slide rail, and the limiting protrusion cooperates with the slide rail in a circumferential direction around the preset axial direction.
[0007] In one embodiment, the valve core assembly includes a sliding nut, the sliding nut is provided with a stop protrusion corresponding to the slide rail, and the stop protrusion and the slide rail are movably matched along a preset axial direction so that the sliding nut can move relative to the track portion along the preset axial direction.
[0008] In one of the embodiments, the stop portion is further provided with a stop protrusion, the stop protrusion and the limiting protrusion are distributed along a preset axial interval, and the top of the track portion is clamped between the stop protrusion and the limiting protrusion.
[0009] In one embodiment, the track portion includes a connecting ring and a convex strip. The connecting ring is ring-shaped and extends along a circumferential direction around a preset axial direction. The track portion is sleeved on the outer side of the stop portion through the connecting ring and is fixedly connected to the stop portion. One end of the convex strip is connected to the connecting ring, and the other end extends along the preset axial direction. There are multiple convex strips, and adjacent convex strips are spaced apart to form a slide rail.
[0010] In one of the embodiments, two opposite ends of the connecting ring are provided with positioning structures, and the positioning structures are used to position the track part during mold opening.
[0011] In one of the embodiments, the number of the slide rails is greater than or equal to two.
[0012] In one embodiment, the stopper is an injection molded part, and the track portion is embedded in the stopper.
[0013] In one embodiment, the track portion and the stop portion are limitedly matched along a preset axial direction, and the track portion and the stop portion are limitedly matched along a circumferential direction around a preset axial direction.
[0014] The present application also provides a refrigeration system, which includes the electronic expansion valve described in any one of the above embodiments.
[0015] Compared with the prior art, the electronic expansion valve and refrigeration system provided by the present application, since the valve core assembly needs to slide with the track portion along a preset axial direction, the track portion is a metal part, which is conducive to improving the wear resistance of the track portion and the stop seat, thereby improving the service life of the electronic expansion valve. In addition, compared with plastic parts, the track portion is set as a metal part, which is conducive to improving the matching accuracy of the track portion and the valve core assembly, thereby improving the movement accuracy of the valve core assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 A schematic diagram of the structure of an electronic expansion valve according to an embodiment of the present application;
[0018] Figure 2 A cross-sectional view of an electronic expansion valve according to an embodiment of the present application;
[0019] Figure 3 A schematic diagram of the structure of a rotor assembly and a guide rod according to an embodiment of the present application;
[0020] Figure 4 A schematic diagram of the structure of a stopper portion of an embodiment provided by the present application;
[0021] Figure 5 A schematic structural diagram of a track portion of an embodiment provided in the present application.
[0022] : Illustration numerals: 100, housing; 200, rotor assembly; 300, screw rod; 400, valve core assembly; 410, sliding nut; 411, anti-rotation protrusion; 420, first valve needle; 430, second valve needle; 431, adjusting channel; 500, valve seat assembly; 510, valve mouth; 600, stop ring; 700, guide rod; 800, stop seat; 810, outer guide rail portion; 820, stop portion; 821, limiting protrusion; 822, stop protrusion; 830, track portion; 831, slide rail; 832, connecting ring; 8321, positioning structure; 833, convex strip; 910, first elastic member; 920, second elastic member. DETAILED DESCRIPTION
[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0029] See also Figure 1-Figure 5 The present application provides an electronic expansion valve, which includes a housing 100, a stator assembly (not shown), a rotor assembly 200, a screw rod 300, a valve core assembly 400 and a valve seat assembly 500. The housing 100 is covered on the outside of the rotor assembly 200, part of the screw rod 300 and part of the valve core assembly 400 and welded to the valve seat assembly 500. The stator assembly is sleeved on the outside of the housing 100, and the stator assembly can drive the rotor assembly 200 to rotate. The valve seat assembly 500 is provided with a valve mouth 510, and the valve core assembly 400 can move relative to the valve seat assembly 500 along the axial direction of the screw rod 300, one end of the screw rod 300 is fixedly connected to the rotor assembly 200, and the other end is threadedly connected to the valve core assembly 400, and the rotor assembly 200 can drive the valve core assembly 400 to move toward or away from the valve mouth 510 through the screw rod 300.
[0030] The electronic expansion valve further includes a stop ring 600, a guide rod 700 and a stop seat 800, wherein the stop seat 800 is sleeved outside the screw rod 300 and fixedly connected to the valve seat assembly 500. The stop seat 800 is also provided with an outer guide rail portion 810 (a threaded guide rail in this embodiment) on the outer peripheral side away from the screw rod 300, the stop ring 600 is sleeved on the outer periphery of the stop seat 800 and movably cooperates with the outer guide rail portion 810, the guide rod 700 is fixedly connected to the rotor assembly 200 or the screw rod 300, and the rotor assembly 200 can drive the guide rod 700 to push the stop ring 600 to spirally move along the outer guide rail portion 810.
[0031] The valve core assembly 400 includes a sliding nut 410, a first valve needle 420 and a second valve needle 430. The end of the screw rod 300 away from the rotor assembly 200 is threadedly matched with the sliding nut 410. The screw rod 300 can drive the sliding nut 410 to drive the second valve needle 430 to open or close the valve port 510 through the first valve needle 420. The second valve needle 430 is provided with an adjustment channel 431 that can be connected to the valve port 510. The flow area of the adjustment channel 431 is smaller than the flow area of the valve port 510. The screw rod 300 can drive the sliding nut 410 to drive the first valve needle 420 to flexibly cooperate with the adjustment channel 431 to control the amount of liquid entering the adjustment channel 431.
[0032] In this way, the screw rod 300 can be rotated along the preset direction first to drive the sliding nut 410 to drive the first valve needle 420 and the second valve needle 430 to close the valve mouth 510. Then, the screw rod 300 can be rotated in the direction opposite to the preset direction to drive the sliding nut 410 to drive the first valve needle 420 to move away from the regulating channel 431, thereby achieving fine-tuning of the liquid inlet amount at the regulating channel 431.
[0033] In one embodiment, the electronic expansion valve further comprises a first elastic member 910, one end of the first elastic member 910 is connected to the screw rod 300, and the other end is connected to the stop seat 800 or the valve seat assembly 500, wherein the connection here comprises abutment. The first elastic member 910 is a compression elastic member, so that the screw rod 300 and the stop seat 800 (or the valve seat assembly 500) can be movably matched along the axial direction of the screw rod 300 through the first elastic member 910.
[0034] When the valve core assembly 400 moves to the position of closing the valve mouth portion 510 and the rotor assembly 200 continues to rotate, the first valve needle 420 and the second valve needle 430 can no longer move toward the valve mouth portion 510. Since the screw rod 300 and the valve seat assembly 500 can cooperate along the axial direction of the screw rod 300 through the first elastic member 910, the screw rod 300 and the rotor assembly 200 move in a direction away from the valve mouth portion 510, and the first elastic member 910 is squeezed during the movement of the screw rod 300. Under the push of the reaction force, the first elastic member 910 generates an elastic force on the screw rod 300. The elastic force can drive the screw rod 300 to drive the valve core assembly 400 to further squeeze the valve mouth portion 510, so as to generate a pre-tightening force on the valve mouth portion 510, thereby improving the sealing between the valve mouth portion 510 and the second valve needle 430.
[0035] Specifically, in one embodiment, the first elastic member 910 is a compression spring or a metal spring.
[0036] In one embodiment, the electronic expansion valve also includes a second elastic member 920, one end of the second elastic member 920 abuts against the second valve needle 430, and the other end abuts against the valve seat assembly 500, and the second elastic member 920 is a compression elastic member so that the second valve needle 430 has a tendency to move toward the direction close to the valve mouth portion 510.
[0037] In this way, the second valve needle 430 is always driven by the second elastic member 920 , which can prevent the second valve needle 430 from shaking left and right, thereby facilitating the alignment of the first valve needle 420 and the regulating channel 431 .
[0038] Specifically, in one embodiment, the second elastic member 920 is a compression spring, and the second elastic member 920 is sleeved on the outside of a portion of the first valve needle 420 and a portion of the sliding nut 410. At least a portion of the second elastic member 920 is located inside the second valve needle 430. When the second valve needle 430 closes the valve port 510, the second elastic member 920 provides a pre-tightening force to ensure the sealing of the valve port 510 when it is in a closed state.
[0039] In this way, it is helpful to control the driving force of the second elastic member 920 on the second valve needle 430 .
[0040] In one embodiment, if Figure 2 and Figure 4 As shown, the stop seat 800 includes a stop portion 820 and a track portion 830, the outer guide rail portion 810 is arranged on the stop portion 820, and the track portion 830 is a metal part and is connected to one end of the stop portion 820, and the sliding nut 410 and the track portion 830 are limitedly matched so that the sliding nut 410 and the track portion 830 slide and match along a preset axial direction.
[0041] It should be noted that the preset axial direction, the axial direction of the screw rod 300, the axial direction of the stop seat 800, the axial direction of the valve core assembly 400, the axial direction of the rotor assembly 200 and the axial direction of the electronic expansion valve are all in the same direction, that is, in the electronic expansion valve, the components such as the screw rod 300, the stop seat 800 and the valve core assembly 400 are all coaxially arranged.
[0042] Since the sliding nut 410 needs to slide with the track portion 830 along a preset axial direction, the track portion 830 is a metal part, which is conducive to improving the wear resistance of the track portion 830 and the stop seat 800, thereby improving the service life of the electronic expansion valve. In addition, compared with plastic parts, the track portion 830 is set as a metal part, which is conducive to improving the matching accuracy of the track portion 830 and the sliding nut 410, thereby improving the movement accuracy of the valve core assembly 400.
[0043] Furthermore, in one embodiment, the stopper 820 is an injection molded part, and the track portion 830 is embedded in one end of the stopper 820 close to the valve port portion 510 .
[0044] Specifically, the processing technology of the rail part 830 and the stop part 820 is that the metal rail part 830 can be first fixed at a specific position of the injection mold, and then the injection mold is injection molded and cast to form the stop part 820, and after the stop part 820 is solidified and fixed, the rail part 830 is embedded in the stop part 820 to form an injection-molded-metal hybrid structure.
[0045] In one embodiment, if Figure 2 , Figure 4 and Figure 5 As shown, the track portion 830 and the stop portion 820 are limitedly matched along the axial direction of the screw rod 300 , and the track portion 830 and the stop portion 820 are limitedly matched along the circumferential direction of the screw rod 300 .
[0046] In this way, the connection strength between the rail portion 830 and the stop portion 820 is improved, and relative movement between the rail portion 830 and the stop portion 820 is avoided.
[0047] Specifically, in one embodiment, if Figure 2 , Figure 4 and Figure 5 As shown, the track portion 830 is provided with a slide rail 831 arranged along a preset axial direction, and the stopper portion 820 is provided with a limiting protrusion 821 corresponding to the slide rail 831. The limiting protrusion 821 is located in the slide rail 831, and the limiting protrusion 821 is limitedly matched with the slide rail 831 along the circumferential direction around the preset axial direction. More specifically, one end of the limiting protrusion 821 is connected to the stopper portion 820, and the other end extends along the radial direction of the stopper portion 820 and is inserted into the slide rail 831, so that the limiting protrusion 821 is stopped at the inner walls on both sides of the slide rail 831 along the circumferential direction around the preset axial direction. A plurality of limiting protrusions 821 are distributed along the circumferential direction.
[0048] It should be noted that the inner walls on both sides of the slide rail 831 refer to the inner walls on both sides of the slide rail 831 distributed along the circumferential direction around the preset axial direction.
[0049] This configuration limits the circumferential rotation between the track portion 830 and the stopper portion 820 .
[0050] And, in one embodiment, if Figure 2 As shown, the sliding nut 410 is provided with a stop protrusion 411 corresponding to the slide rail 831, and the stop protrusion 411 and the slide rail 831 are movably matched along a preset axial direction, so that the sliding nut 410 can move relative to the track portion 830 along the preset axial direction.
[0051] Further, in one embodiment, the number of the slide rails 831 is greater than or equal to two, the number of the limiting protrusions 821 is the same as the number of the slide rails 831, and the number of the anti-rotation protrusions 411 is less than or equal to the number of the slide rails 831. Specifically, the number of the slide rails 831 can be two, three, or four, etc., which are not listed here one by one.
[0052] Compared with a single slide rail 831, multiple slide rails 831 can reduce the pulling force transmitted to the stop portion 820 by the limiting protrusion 821. For example, when four slide rails 831 are set, there are four corresponding stop protrusions 411. When each stop protrusion 411 moves to the uppermost end, the pulling force applied to the stop seat 800 by the stop protrusion 411 is within the allowable force range of the stop seat 800.
[0053] In one embodiment, if Figure 2 and Figure 4 As shown, the stop portion 820 is also provided with a stop protrusion 822, and the stop protrusion 822 and the limiting protrusion 821 are distributed along the preset axial interval, and the track portion 830 is clamped between the stop protrusion 822 and the limiting protrusion 821, so that the stop protrusion 822 and the limiting protrusion 821 can limit the movement of the track portion 830 along the preset axial direction.
[0054] By providing the limiting protrusion 821 and the stop protrusion 822, the movement of the track portion 830 along the preset axial direction and the rotation along the circumferential direction around the preset axial direction can be simultaneously limited. It should be noted that in this embodiment, the limiting protrusion 821 can not only limit the axial movement of the track portion 830, but also limit the circumferential rotation of the track portion 830. Such a configuration greatly simplifies the structure of the electronic expansion valve, which is conducive to reducing the volume and processing cost of the electronic expansion valve.
[0055] Specifically, the stopping protrusion 822 is annular, and the inner ring of the stopping protrusion 822 is connected to the outer wall of the stopping portion 820 , and the outer ring extends outward along the radial direction of the stopping portion 820 .
[0056] In one embodiment, if Figure 2 and Figure 5 As shown, the track portion 830 includes a connecting ring 832 and a convex strip 833. The connecting ring 832 is annular and extends along the circumferential direction around the preset axial direction. The track portion 830 is sleeved on the outer side of the stop portion 820 through the connecting ring 832 and is fixedly connected to the stop portion 820. Specifically, the connecting ring 832 is clamped between the stop protrusion 822 and the limiting protrusion 821. One end of the convex strip 833 is connected to the connecting ring 832, and the other end extends along the preset axial direction. There are multiple convex strips 833, and adjacent convex strips 833 are arranged at intervals to form a slide rail 831.
[0057] This helps to reduce the difficulty of processing the rail portion 830 .
[0058] In one embodiment, if Figure 5 As shown, both ends of the connecting ring 832 that are relatively arranged are provided with positioning structures 8321. Specifically, the positioning structure 8321 can be in the shape of a notch or a protrusion. It can be understood that the track portion 830 in the present application is a powder metallurgy molded part. Since the precision of the powder metallurgy molded part is not enough when it is just made, the opening size of the slide rail 831 is relatively large and needs to be extruded once in the mold. For example, the groove width of the slide rail 831 is 3.1±0.1 (mm), and after extrusion it is 3.1±0.02 (mm). This is a conventional process for powder metallurgy molded parts. In order to facilitate the placement of the powder metallurgy molded part into the mold, by setting the positioning structures 8321 at the opposite ends of the powder metallurgy molded part, the mold is provided with a limiting structure that matches the positioning structure 8321. After the positioning structure 8321 and the limiting structure are aligned, the powder metallurgy molded part (in this embodiment, the track portion 830) can be accurately placed in the mold for extrusion.
[0059] In one embodiment, the rail portion 830 is welded to the valve cover.
[0060] However, it is not limited thereto. In other embodiments, the rail portion 830 may also be riveted, clamped or threadedly connected to the valve cover, which are not listed here one by one.
[0061] The present application also provides a refrigeration system, which includes the electronic expansion valve described in any one of the above embodiments.
[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0063] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.
Claims
1. An electronic expansion valve, characterized in that: The invention comprises a rotor assembly (200), a screw rod (300), a valve core assembly (400) and a valve seat assembly (500); the valve seat assembly (500) is provided with a valve opening (510); the rotor assembly (200) can drive the valve core assembly (400) to move in a direction close to or away from the valve opening (510) through the screw rod (300); The electronic expansion valve further comprises a stop seat (800), wherein the stop seat (800) is sleeved outside the screw rod (300) and is fixedly connected to the valve seat assembly (500); The stop seat (800) comprises a stop portion (820) and a track portion (830), wherein the track portion (830) is a metal part and is connected to one end of the stop portion (820), and the valve core assembly (400) and the track portion (830) are slidably matched along a preset axial direction.
2. The electronic expansion valve according to claim 1, characterized in that: The track portion (830) is provided with a slide rail (831) arranged along the preset axial direction, and the stop portion (820) is provided with a limiting protrusion (821) corresponding to the slide rail (831), and the limiting protrusion (821) is located in the slide rail (831), and the limiting protrusion (821) is limitedly matched with the slide rail (831) along the circumferential direction around the preset axial direction.
3. The electronic expansion valve according to claim 2, characterized in that: The valve core assembly (400) includes a sliding nut (410), and the sliding nut (410) is provided with a stop protrusion (411) corresponding to the slide rail (831). The stop protrusion (411) and the slide rail (831) are movably matched along the preset axial direction, so that the sliding nut (410) can move relative to the track portion (830) along the preset axial direction.
4. The electronic expansion valve according to claim 2, characterized in that: The stop portion (820) is further provided with a stop protrusion (822), the stop protrusion (822) and the limit protrusion (821) are distributed along the preset axial interval, and the top of the track portion (830) is clamped between the stop protrusion (822) and the limit protrusion (821).
5. The electronic expansion valve according to claim 2, characterized in that: The track portion (830) includes a connecting ring (832) and a convex strip (833); the connecting ring (832) is ring-shaped and extends along a circumferential direction around the preset axial direction; the track portion (830) is sleeved on the outer side of the stop portion (820) through the connecting ring (832) and is fixedly connected to the stop portion (820); one end of the convex strip (833) is connected to the connecting ring (832) and the other end extends along the preset axial direction; the number of the convex strips (833) is multiple, and adjacent convex strips (833) are arranged at intervals to form the slide rail (831).
6. The electronic expansion valve according to claim 5, characterized in that: The connecting ring (832) is provided with a positioning structure (8321), and the positioning structure (8321) is used for positioning the track portion (830) during mold opening.
7. The electronic expansion valve according to claim 2, characterized in that: The number of the slide rails (831) is greater than or equal to two.
8. The electronic expansion valve according to claim 1, characterized in that: The stopper (820) is an injection molded part, and the track part (830) is embedded in the stopper (820).
9. The electronic expansion valve according to claim 1, characterized in that: The track portion (830) and the stop portion (820) are matched in a limited position along the preset axial direction, and the track portion (830) and the stop portion (820) are matched in a limited position along a circumferential direction around the preset axial direction.
10. A refrigeration system, characterized in that: It comprises the electronic expansion valve as described in any one of claims 1 to 9.