Electronic expansion valve and refrigeration equipment
By using aluminum windings and molding the windings, pins, and wire assemblies into one or separate components, the high cost and electrical insulation problems of existing electronic expansion valves have been solved, achieving improvements in miniaturization, stability, and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-03
AI Technical Summary
The coil windings of existing electronic expansion valves are mainly made of copper, which results in high production costs and large price fluctuations. Furthermore, the existing processes are complex and it is difficult to guarantee electrical insulation performance.
Aluminum windings are used, and the connection between the windings and the pins and wire assemblies is formed into an injection-molded package through one-piece or separate injection molding, which simplifies the production process, improves electrical insulation performance, and reduces production costs.
This has enabled the miniaturization, improved stability and reliability of electronic expansion valves, while significantly reducing production costs and simplifying production cycles and processes.
Smart Images
Figure CN223965652U_ABST
Abstract
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 are connected to the stator component, the lead connection points are potted with epoxy resin, polyurethane, or other potting adhesives. This process is complex, and the electrical insulation methods / materials used for the windings differ from those for the pins and leads, making it difficult to guarantee insulation performance. Furthermore, the winding material for electronic expansion valve coils is commonly copper wire. The relatively high and volatile price of copper in the market leads to high production costs for electronic expansion valves, thus limiting the application range and scope of the windings. Utility Model Content
[0003] The main purpose of this invention is to provide an electronic expansion valve and a refrigeration device, which aims to reduce the production cost of coils.
[0004] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:
[0005] Valve body;
[0006] A coil, comprising a stator assembly, a conductor assembly, pins, 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 pins are mounted on the frame. One end of the pins is electrically connected to the winding, and the other end of the pins 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 pins, 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 or separately formed. The winding is made of aluminum.
[0007] In one embodiment, the stator housing includes a first electrode plate and a second electrode plate, both of which are respectively attached to both ends of the frame in the axial direction. The first electrode plate and the frame enclose a winding groove, and the winding is located within the winding groove. The inner diameter of the second electrode plate is D1, the outer diameter of the first electrode plate is D2, and the number of turns of the winding is H.
[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 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 radially along the valve body.
[0011] 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.
[0012] In one embodiment, the stator assembly is provided in multiple sets, and the injection-molded package simultaneously encapsulates multiple sets of the stator assembly.
[0013] In one embodiment, the electronic expansion valve further includes a protective cap, which is mounted on one end of the valve body and covers the stator assembly.
[0014] In one embodiment, the protective cap is sealed and fixed to the injection-molded package; or the protective cap and the injection-molded package are integrally injection molded.
[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 conductor assembly is injection molded to form an injection-molded package. Compared to the existing technology that first injection molds the winding and then encapsulates the connection between the pin and conductor assembly, this invention either integrally or separately injection molds the connection between the winding and the pin and conductor assembly. Integral injection molding refers to molding the first and second injection-molded packages into a single unit. Separate injection molding refers to first injection molding the first package between the winding and the stator housing, and then separately injection molding the second package at the stator housing. The two injection-molded packages are formed by injection molding, and the second injection-molded package is already connected to the first injection-molded package during injection molding. Therefore, after the second injection-molded package is formed, the first and second injection-molded packages are already connected together, which makes the material of each encapsulation position 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, which is conducive to the miniaturization of the electronic expansion valve. Furthermore, the winding material is aluminum, which significantly reduces the production cost of the coil and the electronic expansion valve compared to the copper winding in the existing technology. 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;
[0019] Figure 2 A cross-sectional view of Embodiment 2 of the electronic expansion valve provided by this utility model;
[0020] Figure 3 for Figure 1 and / or Figure 2 Schematic diagram of the middle stator assembly;
[0021] Figure 4 for Figure 3 A schematic diagram of the structure of the first electrode plate in the middle;
[0022] Figure 5 for Figure 3 A schematic diagram of the structure of the second electrode plate in the middle;
[0023] Figure 6 The electromagnetic force, copper loss and electromagnetic force of the electronic expansion valve provided by this utility model are... Simulation results diagram;
[0024] Figure 7 for Figure 1 and / or Figure 2 Schematic diagram of the valve body and fixing frame;
[0025] Figure 8 for Figure 7 Schematic diagram of the middle fixed frame;
[0026] Figure 9 for Figure 1 A schematic diagram of the structure of the center coil from one perspective;
[0027] Figure 10 for Figure 1 A schematic diagram of the structure of the middle coil from another perspective.
[0028] Explanation of icon numbers:
[0029] 10. Valve body; 20. Coil; 21. Stator assembly; 211. Frame; 212. Winding; 213. Stator housing; 213a. Opening; 213b. First electrode plate; 213c. Second electrode plate; 22. Wire assembly; 221. Wire; 222. Insulating sleeve; 23. Pin; 24. Injection molded package; 241. First injection molded package; 242. Second injection molded package; 243. Annular injection molded part; 244. End face injection molded part; 245. Connecting rib; 246. Buckle; 247. Protective cap; 30. Fixing bracket; 31. Snap-fit hole.
[0030] 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
[0031] 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.
[0032] 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.
[0033] 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.
[0034] Reference Figure 1 This utility model proposes an electronic expansion valve, comprising:
[0035] Valve body 10;
[0036] Coil 20, comprising 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... The package 24 includes a first injection-molded package 241 and a second injection-molded package 242. 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 part of the conductor assembly 22 at that location. The first injection-molded package 241 and the second injection-molded package 242 are integrally formed or separately formed. The winding 212 is made of aluminum.
[0037] In this invention, the connection between the winding 212 and the pin 23 and the conductor assembly 22 is injection molded to form an injection-molded package 24. This is different from the prior art where the winding 212 is first injection molded and then the connection between the pin 23 and the conductor assembly 22 is potted. This invention either integrally or separately injection molds the connection between the winding 212 and the pin 23 and the conductor assembly 22. Integral injection molding refers to molding the first injection-molded package 241 and the second injection-molded package 242 together in one step. Separate injection molding refers to first injection molding the first injection-molded package 241 between the winding 212 and the stator housing 213, and then injection molding the stator housing 242 separately. The second injection-molded package 242 at position 13 is injection molded, and the second injection-molded package 242 is already connected to the first injection-molded package 241 during injection molding. Therefore, after the second injection-molded package 242 is injection molded, the first injection-molded package 241 and the second injection-molded package 242 are already connected together, so that the materials of each encapsulation position are the same, which has better electrical insulation performance, simplifies the production process, shortens the product production cycle, and also reduces the volume of the injection-molded package 24, which is conducive to the miniaturization of the electronic expansion valve. Furthermore, the winding 212 is made of aluminum, which significantly reduces the production cost of the coil 20 and the electronic expansion valve compared to the copper winding 212 in the prior art.
[0038] 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.
[0039] Reference Figures 3 to 5 The stator housing 213 includes a first electrode plate 213b and a second electrode plate 213c. The first electrode plate 213b and the second electrode plate 213c are respectively attached to both ends of the frame 211 in the axial direction. The first electrode plate 213b and the frame 211 enclose a winding groove. The winding 212 is located within the winding groove. The inner diameter of the second electrode plate 213c is D1, the outer diameter of the first electrode plate 213b is D2, and the number of turns of the winding 212 is H. The number of turns in winding 212 refers to the number of turns in a single winding 212, i.e. Figure 1 There are two stator components 21 stacked together, that is, two windings 212 are stacked together, and H is the number of turns of one of the windings 212.
[0040] Reference Figure 6 Because the conductivity and resistance of the aluminum winding 212 are inferior to those of the copper winding 212, in order to ensure the magnetic force of the winding 212 and the normal operation of the electronic expansion valve, D2-D1 represents the difference between the outer diameter of the first electrode plate and the inner diameter of the second electrode plate, and the frame is located between the outer diameter of the first electrode plate and the inner diameter of the second electrode plate, and the winding is wound on the frame, that is, D2-D1 can also represent the space where the winding can be wound. Therefore, if This will result in D2-D1 being too small, leading to too few windings that can be wound, resulting in insufficient electromagnetic force in the motor, failing to meet the minimum acceptable electromagnetic force, and thus failing to drive the electronic expansion valve to operate normally; while if At this point, D2-D1 is relatively large, meaning the available space for winding is sufficient. However, the number of turns in the winding is too small, leading to increased copper losses and preventing it from exceeding the maximum acceptable copper loss threshold. Therefore, the number of turns in winding 212 is limited to... This increases the electromagnetic force of the electronic expansion valve while reducing its copper consumption.
[0041] Reference Figure 1 , Figure 2 , Figure 7 as well as Figure 8 The 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.
[0042] Reference Figure 1In Embodiment 1, 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.
[0043] Reference Figure 2 In Embodiment 2, 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.
[0044] 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.
[0045] 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.
[0046] 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. Each stator assembly 21 includes a frame 211, a winding 212, and a stator housing 213. The stator housing 213 includes a first electrode plate 213b and a second electrode plate 213c.
[0047] Reference Figure 9 and Figure 10Furthermore, 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.
[0048] 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.
[0049] It should be noted that the stator assembly 21 includes a frame 211, a winding 212, and a stator housing 213. The stator housing 213 includes a first pole plate 213b and a second pole plate 213c. The winding 212 is wound in a winding groove on the frame 211. The first pole plate 213b and the second pole plate 213c are respectively installed at both ends of the frame 211 along the axial direction of the valve body 10. Both the first pole plate 213b and the second pole plate 213c are provided with perforated structures, and there are also connecting gaps in the circumferential direction of the first pole plate 213b and the second pole plate 213c. 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.
[0050] In another embodiment, the stator assembly 21 is provided in multiple groups, and the injection-molded package 24 simultaneously encapsulates multiple stator assemblies 21. That is, the injection-molded package 24 encapsulates all the stator assemblies 21, thereby electrically sealing the entire injection-molded package 24, which improves the electrical insulation performance of the electronic expansion valve, and thus improves the stability and safety of the electronic expansion valve.
[0051] Reference Figure 1 In 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 electrode plate 213b and the second electrode plate 213c 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.
[0052] 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.
[0053] 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.
[0054] 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 in that, include: Valve body; A coil, comprising a stator assembly, a conductor assembly, pins, 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 pins are mounted on the frame. One end of the pins is electrically connected to the winding, and the other end of the pins 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 pins, 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 or separately formed. The winding is made of aluminum.
2. The electronic expansion valve as described in claim 1, characterized in that, The stator housing includes a first electrode plate and a second electrode plate, both of which are respectively attached to both ends of the frame in the axial direction. The first electrode plate and the frame form a winding groove, and the winding is located within the winding groove. The inner diameter of the second electrode plate is D1, the outer diameter of the first electrode plate is D2, and the number of turns of the winding is H.
3. The electronic expansion valve as described in claim 1, characterized in that, The electronic expansion valve also includes a mounting bracket connected to the outer periphery of the valve body. The mounting bracket has a snap-fit hole. The coil also includes a snap fastener installed on the injection-molded package and snapped into the snap-fit hole.
4. The electronic expansion valve as described in claim 3, characterized in that, The wire assembly includes a wire and an insulating sleeve. The wire is electrically connected to the pin, and the insulating sleeve is fitted around the outer periphery of the wire. The insulating sleeve extends along the axial direction of the valve body and away from the fixing frame.
5. The electronic expansion valve as described in claim 1, characterized in that, The wire assembly includes a wire and an insulating sleeve. The wire is electrically connected to the pin, and the insulating sleeve is fitted around the outer periphery of the wire and extends along the radial direction of the valve body.
6. The electronic expansion valve as described in any one of claims 1 to 5, characterized in that, 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 also includes an annular injection molded part, which covers the outer periphery of the connection between the two sets of stator assemblies.
7. The electronic expansion valve as described in any one of claims 1 to 5, characterized in that, The stator assembly is provided in multiple sets, and the injection-molded encapsulation body simultaneously encapsulates multiple sets of the stator assembly.
8. The electronic expansion valve as described in claim 1, characterized in that, The electronic expansion valve also includes a protective cap, which is installed at one end of the valve body and covers the stator assembly.
9. The electronic expansion valve as described in claim 8, characterized in that, The protective cap is sealed and fixed to the injection-molded package; or the protective cap and the injection-molded package are integrally injection molded.
10. A refrigeration device, characterized in that, Includes the electronic expansion valve as described in any one of claims 1 to 9.