Electronic expansion valve and refrigeration equipment

Abstract

The utility model discloses an electronic expansion valve and refrigeration equipment, and relates to the refrigeration equipment technical field, the electronic expansion valve comprises a valve body and a coil, a skeleton is arranged in a stator housing, a winding is wound on the skeleton, a contact pin is installed on the skeleton, one end of the contact pin is electrically connected with the winding, and the other end of the contact pin is electrically connected with a wire assembly; the injection molding packaging body comprises a first injection molding packaging body and a second injection molding packaging body, the first injection molding packaging body is located between the winding and the stator shell, the second injection molding packaging body is arranged at an opening of the stator shell in an injection molding mode so as to package the winding, the contact pin and at least part of the wire assembly at the opening, and the first injection molding packaging body and the second injection molding packaging body are integrally formed; the maximum thickness of the second injection molding packaging body in the radial direction of the valve body is H, and H is smaller than or equal to 15 mm. According to the technical scheme, miniaturization of the electronic expansion valve is facilitated, meanwhile, generation of air holes in the injection molding process can be reduced, and the electrical insulation performance of the electronic expansion valve is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of refrigeration equipment, and in particular to an electronic expansion valve and refrigeration equipment. Background Technology

[0002] In existing technology, electronic expansion valves include a valve body, a coil component, and a rotor component. The coil component, when energized, generates a magnetic field that drives the rotor component to rotate, thereby moving the valve core component within the valve body and adjusting the valve opening. The coil component includes windings and leads, which need to be electrically insulated from the outside. Currently, the coil windings are injection molded after winding, and after the pins and leads of the stator component are connected, the lead connection points are potted with epoxy resin, polyurethane, or other potting adhesives. However, this process is complex, the coil is large and occupies space, and it wastes materials. Utility Model Content

[0003] The main purpose of this invention is to propose an electronic expansion valve and a refrigeration device, which aims to facilitate the miniaturization of the electronic expansion valve, reduce the generation of air holes during injection molding, and improve the electrical insulation performance of the electronic expansion valve.

[0004] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:

[0005] Valve body;

[0006] The coil includes a stator assembly, a conductor assembly, a pin, and an injection-molded package. The stator assembly includes a frame, a winding, and a stator housing. The frame is disposed within the stator housing, the winding is wound around the frame, and the pin is mounted on the frame. One end of the pin is electrically connected to the winding, and the other end of the pin is electrically connected to the conductor assembly. The injection-molded package includes a first injection-molded package and a second injection-molded package. The first injection-molded package is located between the winding and the stator housing, and the second injection-molded package is injection-molded at an opening in the stator housing to encapsulate the winding, the pin, and at least a portion of the conductor assembly at that location. The first injection-molded package and the second injection-molded package are integrally formed. The maximum thickness of the second injection-molded package along the radial direction of the valve body is H, where H ≤ 15 mm.

[0007] In one embodiment, the frame is provided with a mounting portion, and the pin includes a mounting section and a connecting section connected to each other. The mounting section is mounted on the mounting portion, and the connecting section protrudes from the mounting portion and is electrically connected to the wire assembly. The length of the connecting section is L, where L≤5mm.

[0008] In one embodiment, the electronic expansion valve further includes a mounting bracket connected to the outer periphery of the valve body, the mounting bracket having a snap-fit ​​hole, and the coil further includes a snap fastener installed on the injection-molded package and snapped into the snap-fit ​​hole.

[0009] In one embodiment, the wire assembly includes a wire and an insulating sleeve, the wire being electrically connected to the pin, and the insulating sleeve being fitted around the outer periphery of the wire and extending along the axial direction of the valve body and away from the mounting bracket.

[0010] In one embodiment, the buckle is made of thermoplastic.

[0011] In one embodiment, the buckle is integrally injection molded with the injection-molded package.

[0012] In one embodiment, the stator assembly is provided in two sets, and the two sets of stator assemblies are stacked along the axial direction of the valve body. The injection molded package further includes an annular injection molded portion, which covers the outer periphery of the connection between the two sets of stator assemblies.

[0013] In one embodiment, the injection-molded package further includes an end face injection portion and a plurality of connecting ribs. The end face injection portion abuts against at least one end face of the stator assembly along the axial direction of the valve body. The end face injection portion is connected to the annular injection portion through the plurality of connecting ribs. The plurality of connecting ribs are spaced apart and arranged around the outer periphery of the stator housing. The end face injection portion, the plurality of connecting ribs, and the annular injection portion are integrally injection molded.

[0014] In one embodiment, the injection-molded package encapsulates the entire stator assembly.

[0015] This utility model also proposes a refrigeration device, including the electronic expansion valve as described above.

[0016] In this invention, the connection between the winding and the pin and the wire assembly is injection molded to form an injection-molded package. Compared to the existing technology that first injection molds the winding and then pots the connection between the pin and the wire assembly, this invention injection molds the connection between the winding and the pin and the wire assembly in one step. This ensures that the material of each encapsulated location is the same, resulting in better electrical insulation performance. It also simplifies the production process, shortens the product production cycle, and reduces the volume of the injection-molded package, thus facilitating the miniaturization of the electronic expansion valve. Furthermore, the maximum thickness of the second injection-molded package is limited to within 15mm, thereby reducing the thickness of the second injection-molded package and further facilitating the miniaturization of the injection-molded package and the electronic expansion valve. It also reduces the generation of air holes during injection molding, further improving electrical insulation performance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A cross-sectional view of an embodiment of the electronic expansion valve provided by this utility model, which includes a protective cap;

[0019] Figure 2 A cross-sectional view of an embodiment of the electronic expansion valve provided by this utility model without a protective cap;

[0020] Figure 3 for Figure 1 or Figure 2 Schematic diagram of the structure of the two sets of stator assemblies;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the valve body and the fixing frame;

[0022] Figure 5 for Figure 4 Schematic diagram of the middle fixed frame;

[0023] Figure 6 for Figure 2 A schematic diagram of the structure of the center coil from one perspective;

[0024] Figure 7 for Figure 2 A schematic diagram of the structure of the middle coil from another perspective.

[0025] Explanation of icon numbers:

[0026] 10. Valve body; 20. Coil; 21. Stator assembly; 211. Frame; 211a. Mounting part; 212. Winding; 213. Stator housing; 213a. Opening; 22. Wire assembly; 221. Wire; 222. Insulating sleeve; 23. Pin; 231. Mounting section; 232. Connecting section; 24. Injection molded package; 241. First injection molded package; 242. Second injection molded package; 243. Annular injection part; 244. End face injection part; 245. Connecting rib; 246. Buckle; 247. Protective cap; 30. Fixing bracket; 31. Snap-fit ​​hole.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Reference Figure 1 and Figure 2 This utility model proposes an electronic expansion valve, comprising:

[0032] Valve body 10;

[0033] The coil 20 includes a stator assembly 21, a conductor assembly 22, a pin 23, and an injection-molded package 24. The stator assembly 21 includes a frame 211, a winding 212, and a stator housing 213. The frame 211 is disposed within the stator housing 213. The winding 212 is wound around the frame 211. The pin 23 is mounted on the frame 211. One end of the pin 23 is electrically connected to the winding 212, and the other end is electrically connected to the conductor assembly 22. The injection-molded package 24 includes a first injection molding... The first injection molded package 241 is located between the winding 212 and the stator housing 213. The second injection molded package 242 is injection molded at the opening 213a of the stator housing 213 to encapsulate the winding 212, the pin 23, and at least a portion of the wire assembly 22 at that location. The first injection molded package 241 and the second injection molded package 242 are integrally formed. The maximum thickness of the second injection molded package 242 along the radial direction of the valve body 10 is H, where H ≤ 15 mm.

[0034] In this invention, the connection between the winding 212 and the pin 23 and the wire assembly 22 is injection molded to form an injection-molded package 24. Compared to the prior art where the winding 212 is injection molded first and then the connection between the pin 23 and the wire assembly 22 is potted, this invention injection molds the connection between the winding 212 and the pin 23 and the wire assembly 22 in one step. This ensures that the material of each encapsulated position is the same, resulting in better electrical insulation performance. It also simplifies the production process, shortens the product production cycle, and reduces the volume of the injection-molded package 24, which is beneficial for the miniaturization of the electronic expansion valve. Furthermore, the maximum thickness of the second injection-molded package 242 is limited to within 15mm, thereby reducing the thickness of the second injection-molded package 242. This further facilitates the miniaturization of the injection-molded package 24 and the electronic expansion valve, while also reducing the generation of air holes during injection molding, thus further improving electrical insulation performance. Wherein, H is the maximum distance between the side wall of the second injection molded package 242 that contacts the winding 212 and the outer peripheral wall of the second injection molded package 242 along the radial direction of the valve body 10. The method for measuring H is as follows: select a point on the side wall of the second injection molded package 242 that contacts the winding 212 as the starting point, select a point on the outer peripheral wall of the second injection molded package 242 as the ending point, and the line connecting the starting point and the ending point is consistent with the radial direction of the valve body 10. Then measure the distance between the starting point and the ending point. Then select multiple sets of starting points and ending points that meet the above requirements and measure the distance between the two points. Finally, select the distance of the set with the largest distance between the starting point and the ending point as H.

[0035] Reference Figures 1 to 3 Specifically, the frame 211 is provided with a mounting part 211a, and the pin 23 includes a mounting section 231 and a connecting section 232 connected to each other. The mounting section 231 is mounted on the mounting part 211a, and the connecting section 232 protrudes from the mounting part 211a and is electrically connected to the wire assembly 22. The length of the connecting section 232 is L, where L≤5mm. The pin 23 and the wire assembly 22 are used for the power connection between the winding 212 and the external power source. Since the injection-molded package 24 surrounds the winding 212 and the connection point between the pin 23 and the wire assembly 22 (i.e., the injection-molded package 24 completely covers the pin 23), to prevent electrical leakage, the length of the connecting section 232 is limited to within 5mm, meaning the length of the pin 23 protruding from the mounting portion is limited to within 5mm. This reduces the thickness of the injection-molded package 24, further facilitating the miniaturization of the injection-molded package 24 and the electronic expansion valve. It also reduces the generation of air bubbles during injection molding, thereby further improving electrical insulation performance. Here, L can also represent the minimum distance between the end face of the connecting section 232 facing away from the mounting section 231 and the outer wall surface of the mounting portion 211a. The method for measuring L is as follows: select a point on the side wall of the mounting part 211a facing the connecting section 232 as the starting point, and then measure the vertical distance between the starting point and the plane where the end face of the connecting section 232 is away from the mounting section 231. By analogy, select multiple starting points and calculate the average of the multiple measured vertical distances to obtain L.

[0036] It's important to note that potting is larger than injection molding because potting requires a thicker encapsulation layer to provide sufficient protection and support. Therefore, it typically uses more material than injection molding, resulting in a larger encapsulated portion. The design of potting molds usually considers the shape, size, and layout of electronic components to ensure the material completely fills the mold and solidifies. Injection molds, on the other hand, focus more on dimensional accuracy and appearance. This difference in mold design can also lead to a larger encapsulated portion resulting from potting.

[0037] Reference Figure 1 , Figure 2 , Figure 4 as well as Figure 5The electronic expansion valve also includes a mounting bracket 30 connected to the outer periphery of the valve body 10. The mounting bracket 30 has a snap-fit ​​hole 31. The coil 20 also includes a snap fastener 246, which is installed on the injection-molded package 24 and snaps into the snap-fit ​​hole 31. Understandably, the coil 20 is connected to the mounting bracket 30 via the cooperation of the snap fastener 246 and the snap-fit ​​hole 31, that is, the coil 20 is connected to the valve body 10 via the snap fastener 246 and the snap-fit ​​hole 31, thereby further improving the stability and reliability of the connection between the coil 20 and the valve body 10, and thus improving the stability and reliability of the electronic expansion valve. Furthermore, the connection method of the snap fastener 246 and the snap-fit ​​hole 31 is simple and reliable, and the installation process does not require other auxiliary tools, thus greatly improving the assembly efficiency between the mounting bracket 30 and the coil 20; furthermore, the connection method of the snap fastener 246 is stable and reliable, thereby reducing the risk of connection detachment due to vibration, impact, etc. Furthermore, the snap-fit ​​246 connection eliminates the need for additional fasteners, plugs, adhesives, and other materials, reducing material costs and consequently lowering the manufacturing costs of the electronic expansion valve.

[0038] Reference Figure 1 , Figure 2 , Figure 6 as well as Figure 7 In one embodiment, the wire assembly 22 includes a wire 221 and an insulating sleeve 222. The wire 221 is electrically connected to the pin 23, and the insulating sleeve 222 is fitted around the outer periphery of the wire 221. The insulating sleeve 222 extends along the axial direction of the valve body 10 and away from the fixing frame 30. One end of the wire 221 is connected to the pin 23 via a circuit board, and the other end is connected to the connector of the refrigeration equipment. Since the connector of the refrigeration equipment is located at the end of the valve body 10 away from the fixing frame 30, when the insulating sleeve 222 extends along the axial direction of the valve body 10 and away from the fixing frame 30, that is, when the insulating sleeve 222 extends towards the connector of the refrigeration unit, the insulating sleeve 222 can be connected to the connector of the refrigeration unit without bending, thereby eliminating the need for bending of the wire assembly 22 and improving the service life of the wire assembly 22.

[0039] In another embodiment, the wire assembly 22 includes a wire 221 and an insulating sleeve 222. The wire 221 is electrically connected to the pin 23, and the insulating sleeve 222 is fitted around the outer periphery of the wire 221, extending radially along the valve body 10. Compared to the prior art where the insulating sleeve 222 extends towards the fixing bracket 30, this invention extends the insulating sleeve 222 radially towards the valve body 10, thereby reducing the bending degree and number of bends of the insulating sleeve 222, and facilitating the electrical connection between the wire 221 component and the connector of the refrigeration equipment.

[0040] Furthermore, the buckle 246 is made of thermoplastic plastic, and the buckle 246 and the injection-molded package 24 are integrally injection molded. The thermoplastic material can be any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyamide, polycarbonate, polymethyl methacrylate, polytetrafluoroethylene, polyethylene terephthalate, etc. Injection molding with thermoplastic plastics can produce products with high dimensional accuracy and good surface finish. The injection-molded products do not produce burrs on the parting surface, therefore post-processing is minimal; only residual gate material needs to be removed, thus reducing the subsequent grinding and polishing steps of the injection-molded package 24, thereby improving the production efficiency of the injection-molded package 24. The buckle 246 and the injection-molded package 24 can be integrally injection molded from the same material. Of course, the buckle 246 and the injection-molded package 24 can also be integrally injection molded from different materials, i.e., two-color injection molding. The injection-molded package 24 can be thermoplastic plastic or other injection molding materials.

[0041] Furthermore, during the connection process between the buckle 246 and the snap-fit ​​hole 31, the buckle 246 will undergo a certain bending deformation to snap into the snap-fit ​​hole 31. Therefore, by using the material of the buckle 246 and the injection molded package 24 as an integral molding process, the reliability and stability of the connection between the buckle 246 and the injection molded package 24 are improved, thereby reducing the possibility of the buckle 246 structure breaking during the connection process between the buckle 246 and the fixing bracket 30, and thus improving the stability and reliability of the buckle 246 structure.

[0042] In one embodiment, the stator assembly 21 is provided in two sets, which are stacked along the axial direction of the valve body 10. The injection molded package 24 further includes an annular injection molded portion 243, which covers the outer periphery of the connection between the two sets of stator assemblies 21. That is, the injection molded package 24 only covers the connection between the two sets of stator assemblies 21. This is because the connection between the two sets of stator assemblies 21 is not a sealed connection, and there are a large number of gaps between them. Therefore, by using the injection molded package 24 to seal the connection between the two sets of stator assemblies 21, the possibility of external dust, water, and other debris entering the coil 20 through the gaps between the two sets of stator assemblies 21 is reduced, thereby improving the safety and reliability of the electronic expansion valve. At the same time, the annular injection molded portion 243 only injection molds the connection between the two sets of stator assemblies 21, thereby reducing the material used in the injection molded package 24 and thus reducing the manufacturing cost of the injection molded package 24.

[0043] Reference Figure 6 and Figure 7Furthermore, the injection-molded package 24 also includes an end-face injection molding portion 244 and a plurality of connecting ribs 245. The end-face injection molding portion 244 abuts against at least one end face of the stator assembly 21 along the axial direction of the valve body 10. The end-face injection molding portion 244 is connected to the annular injection molding portion 243 through the plurality of connecting ribs 245. The plurality of connecting ribs 245 are spaced apart and arranged around the outer periphery of the stator housing 213, and the end-face injection molding portion 244, the plurality of connecting ribs 245, and the annular injection molding portion 243 are integrally injection molded. It can be understood that by injection molding the two ends of the stator assembly 21 in the axial direction of the valve body 10 through the end-face injection molding portion 244, external dust, water, and other debris are reduced from entering through the connection gap between the stator assembly 21 and the valve body 10, and through the perforated structure of the end face of the stator assembly 21, thereby improving the stability and reliability of the electronic expansion valve. By using the structure of the end face injection molding part 244 and the annular injection molding part 243, the end face and part of the outer peripheral surface of the stator assembly 21 are injection molded, that is, only the important and necessary parts of the stator assembly 21 are injection molded, thereby reducing the material used in the injection molded package 24 and thus reducing the production cost of the injection molded package 24.

[0044] The end face injection molding part 244, multiple connecting ribs 245 and annular injection molding part 243 are integrally injection molded, and the multiple connecting ribs 245 are spaced around the outer periphery of the stator shell 213, thereby increasing the connection strength between the end face injection molding part 244 and the annular injection molding part 243, while also reducing the volume of the injection molded package 24, thereby reducing the material consumption required for the injection molded package 24, and thus reducing the production cost of the injection molded package 24.

[0045] It should be noted that the stator assembly 21 includes a frame 211, a winding 212, and a pole plate. The pole plate includes a first pole plate and a second pole plate. The winding 212 is wound in the winding groove on the frame 211. The first pole plate and the second pole plate are respectively installed at both ends of the frame 211 along the axial direction of the valve body 10. Both the first pole plate and the second pole plate are provided with perforated structures, and there are also connection gaps in the circumferential direction of the first pole plate and the second pole plate. All of these need to be injection molded by the injection molding encapsulation body 24 to reduce the entry of external dust, water, and other debris into the coil 20 through these perforated structures and gaps, thereby affecting electrical safety.

[0046] In another embodiment, the injection-molded package 24 encapsulates the entire stator assembly 21. This provides an overall electrical seal for the injection-molded package 24, thereby improving the electrical insulation performance of the electronic expansion valve and consequently enhancing its stability and safety.

[0047] Reference Figure 1In one embodiment, the electronic expansion valve further includes a protective cap 247, which is installed at one end of the valve body 10 and covers the stator assembly 21. Understandably, the end face of the stator assembly 21 away from the mounting bracket 30 has many gaps, such as the connection gap between the inner circumferential surface of the coil 20 and the outer circumferential surface of the valve body 10, and the connection gap between the first and second electrode plates in the stator housing. This allows the protective cap 247 to prevent dust, dirt, and other impurities from entering the coil 20, maintaining the cleanliness and normal operation of the coil 20, thereby improving the electrical safety and service life of the electronic expansion valve. The protective cap 247 protects the coil 20 from direct impact or scratches from external objects, thus extending the service life of the coil 20. During transportation, installation, and daily operation, the coil 20 may be subjected to various accidental collisions; the presence of the protective cap 247 can effectively reduce the occurrence of such damage.

[0048] Furthermore, the protective cap 247 is sealed and fixed to the injection-molded package 24; or the protective cap 247 and the injection-molded package 24 are integrally injection molded. This improves the connection strength and sealing effect between the protective cap 247 and the injection-molded package 24, reduces the possibility of the protective cap 247 breaking and falling off during vibration and handling of the electronic expansion valve, thereby improving the electrical safety of the electronic expansion valve and extending its service life.

[0049] This utility model also proposes a refrigeration device, which can be divided into compression refrigeration devices, absorption refrigeration devices, vapor jet refrigeration devices, heat pump refrigeration devices, and electric heating refrigeration devices, etc. The refrigeration device mainly includes a motor, compressor, electronic expansion valve, evaporator, condenser, accessories, and piping. Examples include refrigerators and air conditioners. The specific structure of the electronic expansion valve is as described in the above embodiments. Since the refrigeration device in this utility model adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic expansion valve characterized by, The electronic expansion valve comprises a valve body and a coil. The coil comprises a stator assembly, a lead assembly, a pin and an injection molding package. The stator assembly comprises a skeleton, a winding and a stator housing.

2. The electronic expansion valve according to claim 1, wherein The skeleton is arranged in the stator housing.

3. The electronic expansion valve of claim 1, wherein The winding is wound around the skeleton.

4. The electronic expansion valve according to claim 3, wherein The pin is mounted on the skeleton.

5. The electronic expansion valve of claim 3, wherein One end of the pin is electrically connected with the winding.

6. The electronic expansion valve of claim 3, wherein The other end of the pin is electrically connected with the lead assembly.

7. The electronic expansion valve according to any one of claims 1 to 6, wherein The injection molding package comprises a first injection molding package and a second injection molding package.

8. The electronic expansion valve of claim 7, wherein The first injection molding package is located between the winding and the stator housing.

9. The electronic expansion valve according to any one of claims 1 to 6, wherein The second injection molding package is injection molded at an opening of the stator housing to encapsulate the winding, the pin and at least part of the lead assembly.

10. A refrigeration appliance characterized in that, The first injection molding package and the second injection molding package are integrally formed. The maximum thickness of the second injection molding package along the radial direction of the valve body is H, and H≤15mm. The skeleton is provided with a mounting portion. The pin comprises a mounting segment and a connecting segment which are connected with each other. The mounting segment is mounted on the mounting portion. The connecting segment protrudes from the mounting portion and is electrically connected with the lead assembly. The length of the connecting segment is L, and L≤5mm. The electronic expansion valve further comprises a fixing frame which is connected with the outer periphery of the valve body. The fixing frame is provided with a clamping hole. The coil further comprises a buckle which is mounted on the injection molding package and clamped in the clamping hole. The lead assembly comprises a lead wire and an insulating sleeve. The lead wire is electrically connected with the pin. The insulating sleeve is sleeved on the outer periphery of the lead wire. The insulating sleeve extends along the axial direction of the valve body and away from the fixing frame. The buckle is made of thermoplastic plastic. The buckle is integrally formed with the injection molding package by injection molding. The stator assembly is provided with two groups which are stacked along the axial direction of the valve body. The injection molding package further comprises an annular injection molding portion which covers the outer periphery of the connection portion of the two groups of stator assemblies. The injection molding package further comprises an end face injection molding portion and a plurality of connecting ribs. The end face injection molding portion abuts against at least one end face of the stator assembly along the axial direction of the valve body. The end face injection molding portion is connected with the annular injection molding portion through the plurality of connecting ribs. The plurality of connecting ribs are annularly arranged on the outer periphery of the stator housing. The end face injection molding portion, the plurality of connecting ribs and the annular injection molding portion are integrally formed by injection molding. The injection molding package wraps the entire stator assembly. The electronic expansion valve comprises any one of claims 1 to 9.

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