Coil assembly of electronic expansion valve, electronic expansion valve and refrigeration equipment

Abstract

The utility model discloses a coil assembly of an electronic expansion valve, the electronic expansion valve and refrigeration equipment, and relates to the technical field of electronic expansion valves, the coil assembly comprises a stator assembly and an electric connecting piece, the stator assembly comprises a stator shell, a framework, a winding and a contact pin, the framework is arranged in the stator shell, the winding is arranged in the framework, and the contact pin is arranged in the stator shell. The winding is wound on the framework, the contact pin is connected to the winding, and the winding is made of copper-clad aluminum; and the electrical connecting piece is connected with the contact pin. The technical scheme provided by the utility model is used for solving the problem of high winding cost.

Description

Technical Field

[0001] This utility model relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve coil assembly, an electronic expansion valve, and a refrigeration device. Background Technology

[0002] Electronic expansion valves are an important component of refrigeration equipment such as air conditioners. Currently, electronic expansion valves on the market consist of a valve body, a coil, and a rotor. The coil, when powered, generates a magnetic field, which rotates the rotor, thereby adjusting the valve opening. The high cost of the coil windings in commercially available electronic expansion valves limits their application range and market space. Utility Model Content

[0003] The main purpose of this invention is to propose a coil assembly for an electronic expansion valve, thereby solving the problem of high cost of the windings in electronic expansion valves.

[0004] To achieve the above objectives, this utility model proposes a coil assembly for an electronic expansion valve, the coil assembly comprising:

[0005] A stator assembly, comprising a stator housing, a frame, windings, and pins, wherein the frame is disposed within the stator housing, the windings are wound around the frame, and the pins are connected to the windings, and the windings are made of copper-clad aluminum.

[0006] An electrical connector is connected to the pin.

[0007] In one embodiment, the coil assembly further includes:

[0008] An injection-molded package is filled in the gap between the stator housing and the winding, and the injection-molded package covers the pins and at least a portion of the electrical connectors.

[0009] In one embodiment, the stator housing includes a plate housing and an electromagnetic plate, the plate housing and the electromagnetic plate are assembled together to form an annular receiving cavity, and the skeleton is disposed in the receiving cavity; the inner diameter of the electromagnetic plate is D1, the outer diameter of the plate housing is D2, and the number of turns of the winding is H, 21mm < H / (D2-D1) < 25mm.

[0010] In one embodiment, the electrical connector extends along an axial direction parallel to the stator housing; or, the electrical connector extends along an axial direction perpendicular to the stator housing.

[0011] In one embodiment, the coil assembly further includes a snap fastener for engaging with a mounting bracket on the valve body of the electronic expansion valve.

[0012] In one embodiment, the buckle is integrally formed with the injection-molded package.

[0013] In one embodiment, the injection-molded package covers the entire exterior of the stator assembly.

[0014] In one embodiment, the stator assembly includes a first stator assembly and a second stator assembly stacked axially, and the injection-molded package further covers a portion of the circumferential side surfaces of the first stator assembly and the second stator assembly, forming a first annular package portion.

[0015] In one embodiment, the injection-molded package further includes a second annular package portion covering at least one end face of the stator assembly, and at least one connecting package portion connecting the second annular package portion and the first annular package portion.

[0016] In one embodiment, the coil assembly further includes a protective cap for covering the end of the valve body of the electronic expansion valve.

[0017] In one embodiment, the protective cap is integrally formed with the injection-molded package.

[0018] In one embodiment, the electrical connector includes a sheath and a wire, the wire passing through and extending from the sheath; the wire is connected to the pin.

[0019] In one embodiment, a plurality of first legs extend from the middle of the electrode shell toward one side of the electromagnetic electrode plate; a plurality of second legs extend from the middle of the electromagnetic electrode plate toward one side of the electrode shell; the first legs and the second legs are staggered from each other.

[0020] This invention also proposes an electronic expansion valve, including a valve body and the aforementioned coil assembly.

[0021] This utility model also proposes a refrigeration device, including the aforementioned electronic expansion valve.

[0022] The coil assembly of the electronic expansion valve of this utility model is formed by injection molding the winding and the connection area of ​​the electrical connector and the pin in one injection molding process, which simplifies the manufacturing process and ensures the insulation performance; and the winding uses copper-clad aluminum enameled wire, which can significantly reduce the cost. Attached Figure Description

[0023] 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.

[0024] Figure 1 A schematic diagram of the structure of an embodiment of the coil assembly provided by this utility model;

[0025] Figure 2 A cross-sectional structural schematic diagram of an embodiment of the electronic expansion valve provided by this utility model;

[0026] Figure 3 A partial structural schematic diagram of the coil assembly provided by this utility model;

[0027] Figure 4 A schematic diagram of the skeleton of the coil assembly provided by this utility model;

[0028] Figure 5 A schematic diagram of the structure of the electrode shell of the coil assembly provided by this utility model;

[0029] Figure 6 A schematic diagram of the electromagnetic pole plate of the coil assembly provided by this utility model;

[0030] Figure 7 A cross-sectional structural schematic diagram of another embodiment of the electronic expansion valve provided by this utility model;

[0031] Figure 8 A cross-sectional structural schematic diagram of another embodiment of the electronic expansion valve provided by this utility model.

[0032] Explanation of icon numbers:

[0033] 1. Electronic expansion valve; 10. Coil assembly; 11. Stator assembly; 11a. First stator assembly; 11b. Second stator assembly; 111. Frame; 1111. Mounting part; 112. Winding; 113. Pin; 114. Stator housing; 114a. Receiving cavity; 1141. Electrode housing; 11411. First support leg; 1142. Electromagnetic electrode; 11421. Second support leg; 12. Electrical connector; 121. Wire; 122. Sheath; 13. Injection molded package; 13a. First annular package; 13b. Second annular package; 13c. Connecting package; 14. Buckle; 15. Protective cap; 20. Valve body; 30. Fixing bracket; 40. Connecting tube. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Electronic expansion valves play a crucial role in refrigeration systems, especially air conditioning systems. The coil in an electronic expansion valve is energized to generate a magnetic field, which in turn drives a rotor inside the valve body to rotate, thus adjusting the valve opening. The coils used in commercially available electronic expansion valves are relatively expensive.

[0038] Therefore, this application addresses the aforementioned problems by optimizing the coil assembly.

[0039] Please refer to Figure 1 , Figure 2 and Figure 3As shown in the figure, an embodiment of this application provides a coil assembly 10 for an electronic expansion valve, which is sleeved on the outer periphery of the valve body 20 of the electronic expansion valve. The coil assembly 10 includes a stator assembly 11, an electrical connector 12, and an injection-molded package 13. The stator assembly 11 includes a frame 111, a winding 112, a pin 113, and a stator housing 114. The frame 111 is disposed inside the stator housing 114, the winding 112 is wound around the frame 111, and the pin 113 is connected to the winding 112. The winding 112 is made of copper-clad aluminum. The electrical connector 12 is connected to the pin 113.

[0040] Specifically, the coil assembly 10 of this application is used in an electronic expansion valve 1, which includes the coil assembly 10 and a valve body 20. The coil assembly 10 is sleeved on the outside of the valve body 20. The valve body 20 has a rotor inside. When the coil assembly 10 is energized, it drives the rotor inside the valve body 20 to rotate, thereby causing the valve needle on the rotor to move up and down relative to the valve orifice, thus changing the flow area within the valve orifice. The flow area of ​​the electronic expansion valve 1 changes as the valve needle moves up and down within the valve orifice. When the flow area changes, the amount of refrigerant flowing through the valve orifice also changes accordingly.

[0041] The stator assembly 11 includes a frame 111, a winding 112, pins 113, and a stator housing 114. The frame 111 is disposed inside the stator housing 114, the winding 112 is wound on the frame 111, and the pins 113 are mounted on the frame 111 and electrically connected to the winding 112. An electrical connector 12 is electrically connected to the pins 113. The electrical connector 12 is used to connect to an external power source to provide electrical energy to the winding 112, thereby generating an alternating magnetic field through the winding 112 to drive the rotor inside the valve body 20 to rotate. In this embodiment, the winding 112 is made of copper-clad aluminum enameled wire, which can significantly reduce costs and expand the application range and space of the winding 112.

[0042] In an alternative embodiment, the injection-molded package 13 fills the gap between the stator housing 114 and the winding 112, and the injection-molded package 13 covers the pin 113 and at least a portion of the electrical connector 12.

[0043] Specifically, the injection-molded package 13 is integrally injection molded on the outside of the winding 112 (i.e., in the gap between the stator housing 114 and the winding 112) and at the connection area between the pin 113 and the electrical connector 12, so as to integrally connect the stator assembly 11 and the electrical connector 12 and maintain electrical insulation between the coil assembly 10 and the outside world.

[0044] In manufacturing the coil assembly 10 of this application, the winding 112 is first wound on the frame 111, and then the pin 113 is inserted into the frame 111. Subsequently, the electrical connector 12 and the pin 113 are connected. The stator assembly 11 and the electrical connector 12 are pre-embedded in the corresponding injection molding machine. Then, by injection molding, the stator assembly 11 and the electrical connector 12 are integrally injection molded into an injection-molded package 13. The stator housing 114 has an opening, through which liquid material flows into the gap between the stator housing 114 and the winding 112, filling the gap to electrically insulate the winding 112 from the outside environment and to fix the winding 112. The injection-molded package 13 also covers the connection area between the pin 113 and the electrical connector 12. This application uses a single injection molding process to form an integral injection-molded package 13 for the connection area of ​​the electrical connector 12 and the pin 113, as well as the outer surface of the winding 112. Compared to existing technologies that first injection mold the outer surface of the winding 112 and then pot the pin 113 and lead wire positions with epoxy resin, polyurethane, or other potting adhesives, the existing technology is complex. Furthermore, while the insulation of the winding 112 is achieved through injection molding, the insulation of the lead wire and pin 113 connection area is achieved through potting adhesive. These different processes result in inconsistent insulation performance. The technical solution of this application only requires a single injection molding process to achieve electrical insulation at the connection area of ​​the winding 112, electrical connector 12, and pin 113, simplifying the manufacturing process. It eliminates the need for subsequent potting and curing, shortening the product production cycle. Moreover, the use of injection molding for insulation ensures stable and excellent insulation performance.

[0045] In an optional embodiment, the electrical connector 12 includes a sheath 122 and a wire 121. The wire 121 passes inside the sheath 122, and the length of the sheath 122 is shorter than that of the wire 121, so that the wire 121 can extend from at least one end of the sheath 122. The portion of the wire 121 extending out of the sheath 122 is electrically connected to the pin 113. In the embodiments of this application, the length of the end of the wire 121 extending out of the sheath 122 is at least 5 mm. The injection-molded package 13 completely covers the portion of the wire 121 extending out of the sheath 122, and at least covers a portion of the sheath 122. The injection-molded package 13 covering part of the sheath 122 allows the wire 121 and the sheath 122 to be tightly integrated, making them less prone to damage during use, thereby increasing the service life of the coil assembly 10.

[0046] In an optional embodiment, the skeleton 111 is provided with a mounting part 1111, the pin 113 is inserted into the mounting part 1111, and the injection molded package 13 covers the mounting part 1111.

[0047] Specifically, please refer to Figure 3 and Figure 4As shown, the frame 111 is used for winding the winding 112. A mounting portion 1111 is integrally formed on one side of the frame 111, meaning the mounting portion 1111 is part of the frame 111. Multiple pins 113 are provided. The mounting portion 1111 has multiple spaced mounting slots, each containing one pin 113. An injection-molded encapsulation body 13 covers the mounting portion 1111 to stably fix the pins 113 to the mounting portion 1111. This application uses integral injection molding to cover the mounting portion 1111 of the frame 111, ensuring that the pins 113 are firmly fixed to the mounting portion 1111 and reducing the risk of the pins 113 falling off.

[0048] In an optional embodiment, the stator housing 114 of the coil assembly 10 includes a plate housing 1141 and an electromagnetic plate 1142. The plate housing 1141 and the electromagnetic plate 1142 are assembled together to form an annular receiving cavity 114a. The frame 111 is disposed in the annular receiving cavity 114a. The inner diameter of the electromagnetic plate 1142 is D1, the outer diameter of the plate housing 1141 is D2, and the number of turns of the winding 112 is H. D1, D2, and H satisfy 21mm < H / (D2-D1) < 25mm.

[0049] Please refer to Figure 5 and Figure 6As shown, specifically, the stator housing 114 is annular in shape, with an annular receiving cavity 114a formed inside. A frame 111 is disposed within the receiving cavity 114a of the stator housing 114. The stator housing 114 includes an electrode housing 1141 and an electromagnetic electrode plate 1142 assembled together. The electromagnetic electrode plate 1142 covers the electrode housing 1141 to form the receiving cavity 114a. The shape of the frame 111 is adapted to the shape of the receiving cavity 114a, and a gap exists between the frame 111 and the stator housing 114 for filling a portion of the injection-molded package 13. The electrode housing 1141 is a cover-like component, with multiple first legs 11411 extending from its center toward the electromagnetic electrode plate 1142. The width of the first legs 11411 gradually decreases to form a triangular structure. Multiple second legs 11421 extend from the center of the electromagnetic pole plate 1142 toward the first leg 11411, with the width of the second legs 11421 gradually decreasing. The multiple first legs 11411 and the multiple second legs 11421 are evenly arranged around the axis of the electromagnetic pole plate 1142. The circles formed by the first legs 11411 and the circles formed by the second legs 11421 have the same diameter, and the first legs 11411 and the second legs 11421 are staggered. The inner diameter of the electromagnetic pole plate 1142 is D1, the outer diameter of the pole plate outer shell 1141 is D2, and the number of turns of the winding 112 is H, where 21mm < H / (D2-D1) < 25mm. By limiting the above conditions, this application can improve the control accuracy of the electromagnetic force generated by the winding 112, thereby improving the ability to accurately control the flow rate of the refrigerant, response speed, stability and reliability.

[0050] In an optional embodiment, a connecting pipe 40 is connected to one axial end of the valve body 20, and an electrical connector 12 extends along a direction parallel to the axial direction of the valve body 20.

[0051] Specifically, a connecting pipe 40 is installed at the lower end of the valve body 20. The connecting pipe 40 is a refrigerant pipe used to transport refrigerant. An electrical connector 12 extends axially parallel to the valve body 20 and points upwards. By aligning the electrical connector 12 with the axial direction of the valve body 20, this application reduces additional space requirements, making the valve body 20 more compact. Furthermore, the axially extending electrical connector 12 simplifies installation and maintenance. Technicians can more easily connect or disconnect the wires 121 of the electrical connector 12 to perform necessary inspections or repairs.

[0052] Please refer to Figure 7 As shown, in another alternative embodiment, the electrical connector 12 extends along an axial direction perpendicular to the valve body 20.

[0053] In an optional embodiment, the coil assembly 10 further includes a snap fastener 14 for engaging with a mounting bracket 30 on the valve body 20 of the electronic expansion valve.

[0054] Specifically, the valve body 20 is a cylindrical structure, and a fixing frame 30 is provided outside the valve body 20. The fixing frame 30 is annular and is sleeved on the outside of the valve body 20. It is used to fix the coil assembly 10. In this embodiment, the coil assembly 10 and the fixing frame 30 are fixed by a snap-fit ​​method, which facilitates the assembly of the two. It should be noted that the coil assembly 10 can also be fixed by other connection methods, such as screw fixing, in which the coil assembly 10 is fixed to the fixing frame 30 by screws.

[0055] In an alternative embodiment, the snap-fit ​​14 is integrally formed with the injection-molded package 13.

[0056] Specifically, the coil assembly 10 also includes a snap fastener 14 made of thermoplastic, which is integrally injection molded with the injection-molded package 13. Multiple snap fasteners 14 are arranged evenly around the axis of the valve body 20, and multiple slots are provided on the mounting bracket 30 at positions corresponding to the snap fasteners 14. The snap fasteners 14 engage with the slots to fix the coil assembly 10 onto the mounting bracket 30. In this embodiment, the snap fasteners 14 and the slots cooperate to facilitate the assembly of the coil assembly 10 onto the mounting bracket 30.

[0057] In an optional embodiment, the injection-molded package 13 covers the entire exterior of the stator assembly 11. Please refer to... Figure 7 As shown, specifically, the injection-molded encapsulation body 13 covers the outside of the stator assembly 11, thereby providing all-round protection for the stator assembly 11 and better protecting the components such as the winding 112 inside the stator assembly 11.

[0058] In another alternative embodiment, the stator assembly 11 includes a first stator assembly 11a and a second stator assembly 11b stacked axially, and the injection-molded package 13 further includes covering a portion of the circumferential side surface of the first stator assembly 11a and the second stator assembly 11b to form a first annular package portion 13a.

[0059] Specifically, the stator assembly 11 includes a first stator assembly 11a and a second stator assembly 11b stacked vertically. Both the first stator assembly 11a and the second stator assembly 11b include a frame 111, a winding 112, and a stator housing 114. The injection-molded package 13 also includes a first annular encapsulation portion 13a covering the circumferential sides of the first stator assembly 11a and the second stator assembly 11b. The first annular encapsulation portion is an annular structural member that covers the outer periphery of the connection position of the first stator assembly 11a and the second stator assembly 11b to fix the two stator units. The axial length of the injection-molded package 13 covering the first stator assembly 11a and the second stator assembly 11b is 4 mm or more. This application uses the first annular encapsulation portion 13a to cover and fix the first stator assembly 11a and the second stator assembly 11b, thereby protecting the stator assembly 11.

[0060] In an optional embodiment, the injection-molded package 13 further includes a second annular package portion 13b covering at least one end face of the stator assembly 11, and at least one connecting package portion 13c connecting the second annular package portion 13b and the first annular package portion 13a.

[0061] Please refer to Figure 1 As shown, specifically, the injection-molded package 13 further includes a second annular package portion 13b and a connecting package portion 13c. The second annular package portion 13b covers at least one end face of the stator assembly 11, and the number of connecting packages 13c is at least one, and the connecting package portion 13c is used to connect the second annular package portion 13b and the first annular package portion 13a. This application forms an integral injection-molded package 13, which can ensure the electrical insulation performance at the winding 112 and the wire 121, and can also fix the first stator assembly 11a and the second stator assembly 11b, and connect the two into one unit.

[0062] Please refer to Figure 8 As shown, in an optional embodiment, the coil assembly 10 further includes a protective cap 15 for covering the end of the valve body 20 of the electronic expansion valve. The protective cap 15 is used to protect the end of the valve body 20 to reduce the probability of damage to the valve body 20.

[0063] In an optional embodiment, the protective cap 15 is integrally molded with the injection-molded package 13. This application integrates the protective cap 15 and the injection-molded package 13, reducing assembly steps and also covering the holes on the stator assembly 11 to achieve waterproof and dustproof effects.

[0064] In an optional embodiment, this application also relates to an electronic expansion valve, which includes a valve body 20 and the aforementioned coil assembly 10. The coil is sleeved outside the valve body 20. When the coil is energized, it generates a magnetic field, which in turn drives a rotor inside the valve body 20 to rotate. This, in turn, drives a valve needle mounted on the rotor to rotate, thereby controlling the cross-sectional area of ​​the valve orifice to control the refrigerant flow rate. The coil assembly 10 of the electronic expansion valve 1 of this application includes a stator assembly 11, an electrical connector 12, and an injection-molded package 13. The stator assembly 11 includes a frame 111, a winding 112, and a pin 113. The winding 112 is wound around the frame 111, and the pin 113 is connected to the winding 112. The winding 112 is made of copper-clad aluminum. The electrical connector 12 is connected to the pin 113, and the injection-molded package 13 covers the winding 112 and the connection point between the pin 113 and the electrical connector 12. This application only requires one injection molding to achieve electrical insulation at the connection positions of winding 112, electrical connector 12 and pin 113, which simplifies the manufacturing process, eliminates the need for injection molding and subsequent potting and curing, and shortens the product production cycle; the uniform use of injection molding for insulation ensures its insulation performance, which is stable and good.

[0065] This application also relates to a refrigeration device that includes the aforementioned electronic expansion valve. The refrigeration device can be an air conditioner, etc.

[0066] 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. A coil assembly for an electronic expansion valve, characterized in that, The coil assembly includes: A stator assembly, comprising a stator housing, a frame, windings, and pins, wherein the frame is disposed within the stator housing, the windings are wound around the frame, and the pins are connected to the windings, and the windings are made of copper-clad aluminum. An electrical connector is connected to the pin.

2. The coil assembly of the electronic expansion valve as described in claim 1, characterized in that, The coil assembly also includes: An injection-molded package is filled in the gap between the stator housing and the winding, and the injection-molded package covers the pins and at least a portion of the electrical connectors.

3. The coil assembly of the electronic expansion valve as described in claim 1, characterized in that, The stator housing includes a plate housing and an electromagnetic plate. The plate housing and the electromagnetic plate are assembled together to form an annular receiving cavity. The skeleton is disposed in the receiving cavity. The inner diameter of the electromagnetic plate is D1, the outer diameter of the plate housing is D2, and the number of turns of the winding is H, where 21mm < H / (D2-D1) < 25mm.

4. The coil assembly of the electronic expansion valve as claimed in claim 1, characterized in that, The electrical connector extends along an axial direction parallel to the stator housing; or, the electrical connector extends along an axial direction perpendicular to the stator housing.

5. The coil assembly of the electronic expansion valve as described in claim 2, characterized in that, The coil assembly also includes a clip for engaging with a mounting bracket on the valve body of the electronic expansion valve.

6. The coil assembly of the electronic expansion valve as described in claim 5, characterized in that, The buckle is integrally formed with the injection-molded package.

7. The coil assembly of the electronic expansion valve as described in claim 2, characterized in that, The injection-molded package covers the entire exterior of the stator assembly.

8. The coil assembly of the electronic expansion valve as claimed in claim 2, characterized in that, The stator assembly includes a first stator assembly and a second stator assembly stacked axially, and the injection-molded package further covers a portion of the circumferential side surfaces of the first stator assembly and the second stator assembly, forming a first annular package portion.

9. The coil assembly of the electronic expansion valve as claimed in claim 8, characterized in that, The injection-molded package further includes a second annular package portion covering at least one end face of the stator assembly, and at least one connecting package portion connecting the second annular package portion and the first annular package portion.

10. The coil assembly of the electronic expansion valve as claimed in claim 1, characterized in that, The coil assembly also includes a protective cap for covering the end of the valve body of the electronic expansion valve.

11. The coil assembly of the electronic expansion valve as claimed in claim 10, characterized in that, The protective cap is integrally molded with the injection-molded package.

12. The coil assembly of the electronic expansion valve as claimed in claim 1, characterized in that, The electrical connector includes a sheath and a wire, the wire passing through the sheath and extending out of the sheath; the wire is connected to the pin.

13. The coil assembly of the electronic expansion valve as claimed in claim 3, characterized in that, The middle portion of the electrode shell extends into one side of the electromagnetic electrode plate, along with a plurality of first legs; the middle portion of the electromagnetic electrode plate extends into one side of the electrode shell, along with a plurality of second legs; the first legs and the second legs are staggered.

14. An electronic expansion valve, characterized in that, It includes a valve body and a coil assembly as described in any one of claims 1-13.

15. A refrigeration device, characterized in that, Includes the electronic expansion valve as described in claim 14.

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