Coil component and electronic expansion valve having same

Abstract

Provided in the present application are a coil component and an electronic expansion valve having same. The coil component comprises: a coil body; a wire assembly comprising a wire and a sheath, wherein the wire is directly or indirectly electrically connected to the coil body, and the sheath is sleeved on the outer side of the wire; and a wire protection structure sleeved on the wire assembly and arranged close to the coil body, wherein the wire protection structure is provided with a pressing portion, which is sleeved on the outer side of the sheath and can press the wire and the sheath so as to limit the relative position between the wire and the sheath. By means of the technical solution provided in the present application, the problem of a gap being highly prone to forming between a sheath and a wire in the prior art can be solved.

Description

Coil components and electronic expansion valves having them

[0001] This application claims priority to the patent application filed on January 15, 2025, with China National Intellectual Property Administration, application number 202520098915.4, entitled "Coil Component and Electronic Expansion Valve Having Therethe". Technical Field

[0002] This application relates to the field of electronic expansion valve technology, and more specifically, to a coil component and an electronic expansion valve having therein. Background Technology

[0003] In related technologies, the lead wire assembly and coil body can be formed into a coil component through a single injection molding process. During the injection molding process, the pins of the lead wire assembly and the coil body are electrically connected. The lead wire assembly is partially encapsulated by a molding compound and is injection molded inside the coil component. The lead wire assembly includes a lead wire and a sheath. The lead wire passes through the sheath, and the sheath is tightly attached to the outer surface of the lead wire but is not fixed to the lead wire. Therefore, when the lead wire assembly is subjected to external pressure, it is prone to deformation, resulting in a gap between the sheath and the lead wire.

[0004] In related technologies, when using a single injection molding process, the lead assembly is affected by the injection pressure, and gaps are easily generated between the sheath and the lead. During the integral injection molding of the lead assembly and the coil body, the gas inside the mold cavity can enter the gap between the sheath and the lead, causing the gap to become larger and larger. Under the influence of the injection pressure, the molding compound can flow along the gap to the space between the sheath and the lead. The molding compound can flow along this gap, and finally, under the influence of the injection pressure and injection temperature, the molding compound melts the sheath and the lead, causing the molding compound to flow outside the sheath, resulting in poor coil insulation.

[0005] Application content

[0006] This application provides a coil component and an electronic expansion valve having the same, to solve the problem of easy gaps between the sheath and the wire in the prior art.

[0007] According to one aspect of this application, a coil component is provided, comprising: a coil body; a conductor assembly including a conductor and a sheath, the conductor being directly or indirectly electrically connected to the coil body, the sheath being sleeved on the outside of the conductor; and a wire protection structure sleeved on the conductor assembly and disposed close to the coil body, the wire protection structure having a compression portion sleeved on the outside of the sheath, the compression portion being capable of compressing the conductor and the sheath to limit the relative position of the conductor and the sheath.

[0008] Furthermore, the wire protection structure has a first receiving cavity, a compression portion is located in the first receiving cavity, a conductor assembly is inserted into the first receiving cavity, at least a portion of the conductor and the sheath are located in the compression portion, the first receiving cavity has a thickness direction and a width direction arranged opposite to each other, in the compression portion, the dimension of the first receiving cavity in the thickness direction is smaller than the dimension of the conductor assembly in the thickness direction, and / or, the dimension of the first receiving cavity in the width direction is smaller than the dimension of the conductor assembly in the width direction.

[0009] Furthermore, in the extrusion section, the dimension b2 of the first receiving cavity along the thickness direction is smaller than the dimension b1 of the wire assembly along the thickness direction, 0 < b1 - b2 < 0.4 mm; the dimension a2 of the first receiving cavity along the width direction is larger than the dimension a1 of the wire assembly along the width direction, a2 - a1 > 1 mm.

[0010] Furthermore, in the extrusion section, the first receiving cavity is interference-fitted with the wire assembly in the thickness direction, and / or the first receiving cavity is interference-fitted with the wire assembly in the width direction.

[0011] Furthermore, the coil component also includes: an encapsulation layer, which at least encapsulates the electrical connection between the coil body and the wire assembly, and at least partially encapsulates the wire assembly, with the extruded portion located within the encapsulation layer.

[0012] Furthermore, the wire protection structure has a second receiving cavity, which is located close to the coil body relative to the first receiving cavity. A limiting protrusion is provided on the side wall of the second receiving cavity, and the limiting protrusion abuts against the end of the sheath on the wire assembly and the end electrically connected to the coil body to limit the position of the wire assembly.

[0013] Furthermore, the dimension of the second receiving cavity along the thickness direction is smaller than the dimension of the first receiving cavity along the thickness direction, and the dimension of the second receiving cavity along the width direction is greater than or equal to the dimension of the first receiving cavity along the width direction; or, the dimension of the second receiving cavity along the thickness direction is greater than or equal to the dimension of the first receiving cavity along the thickness direction, and the dimension of the second receiving cavity along the width direction is smaller than the dimension of the first receiving cavity along the width direction.

[0014] Furthermore, the second receiving cavity has a thickness dimension b3 that is greater than or equal to the wire diameter D1 and less than the thickness dimension b2 of the first receiving cavity, where D1 ≤ b3 < b2; the second receiving cavity has a width dimension a3 that is greater than or equal to the width dimension a2 of the first receiving cavity, where a2 ≤ a3.

[0015] Furthermore, the wire protection structure also includes a connecting part, which is fixedly connected to the coil body to limit the relative position of the conductor assembly and the coil body.

[0016] Furthermore, the connecting part engages with the coil body.

[0017] Furthermore, the conductor assembly includes multiple conductors, a sheath is fitted over the outside of the multiple conductors, and the connection part has multiple independently set partition cavities, with each partition cavity corresponding to one of the multiple conductors, and the conductors located in the corresponding partition cavities.

[0018] According to another aspect of this application, an electronic expansion valve is provided, which includes the coil component provided above.

[0019] By applying the technical solution of this application, the conductor is electrically connected to the coil body, the sheath is sleeved on the outside of the conductor, and the extrusion part of the wire protection structure is sleeved on the outside of the sheath. The extrusion part can extrude the conductor and the sheath, thereby limiting the relative position of the conductor and the sheath. This can prevent the conductor assembly from being squeezed by external force or from gaps between the sheath and the conductor caused by the injection pressure during injection molding. This can prevent the molding compound from flowing through the gap between the sheath and the conductor to the downstream of the position where the conductor assembly is squeezed by the extrusion part, thus preventing the molding compound from melting the sheath and the conductor, ensuring the insulation performance of the coil components, and reducing the risk of electrical failure. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 shows a schematic diagram of the structure of the wire assembly with different dimensions in the thickness and width directions provided in this application;

[0022] Figure 2 shows a schematic diagram of the structure of the wire assembly with the same dimensions in the thickness and width directions provided in this application;

[0023] Figure 3 shows a schematic diagram of the wire protection structure provided in Embodiment 1 of this application;

[0024] Figure 4 shows a cross-sectional view along the AA direction in Figure 3;

[0025] Figure 5 shows a top view of the wire protection structure provided in Embodiment 1 of this application;

[0026] Figure 6 shows a schematic diagram of the structure of the wire protection structure and the conductor assembly provided in Embodiment 1 of this application;

[0027] Figure 7 shows a cross-sectional view of the wire protection structure and conductor assembly provided in Embodiment 1 of this application;

[0028] Figure 8 shows a schematic diagram of the structure of the coil body, the wire protection structure and the conductor assembly provided in Embodiment 1 of this application;

[0029] Figure 9 shows a cross-sectional view of the coil body, wire protection structure and conductor assembly provided in Embodiment 1 of this application;

[0030] Figure 10 shows a schematic diagram of the coil component provided in Embodiment 1 of this application;

[0031] Figure 11 shows a cross-sectional view of the coil component provided in Embodiment 1 of this application;

[0032] Figure 12 shows a schematic diagram of the wire protection structure provided in Embodiment 2 of this application;

[0033] Figure 13 shows a cross-sectional view along the BB direction in Figure 12;

[0034] Figure 14 shows a bottom view of the wire protection structure provided in Embodiment 2 of this application;

[0035] Figure 15 shows a schematic diagram of the structure of the wire protection structure and the conductor assembly provided in Embodiment 2 of this application;

[0036] Figure 16 shows a cross-sectional view of the wire protection structure and conductor assembly provided in Embodiment 2 of this application;

[0037] Figure 17 shows a schematic diagram of the structure of the coil body, the wire protection structure and the conductor assembly provided in Embodiment 2 of this application;

[0038] Figure 18 shows a cross-sectional view of the coil body, wire protection structure and conductor assembly provided in Embodiment 2 of this application;

[0039] Figure 19 shows a front view of the wire protection structure provided in Embodiment 3 of this application;

[0040] Figure 20 shows a cross-sectional view along the CC direction in Figure 19;

[0041] Figure 21 shows a schematic diagram of the wire protection structure provided in Embodiment 3 of this application;

[0042] Figure 22 shows a schematic diagram of the structure of the coil body, the wire protection structure and the conductor assembly provided in Embodiment 3 of this application;

[0043] Figure 23 shows a cross-sectional view of the coil body, wire protection structure and conductor assembly provided in Embodiment 3 of this application;

[0044] Figure 24 shows a schematic diagram of the coil component provided in Embodiment 3 of this application;

[0045] Figure 25 shows a cross-sectional view of the coil component provided in Embodiment 3 of this application.

[0046] The above-mentioned figures include the following reference numerals: 10, coil body; 20, conductor assembly; 21, conductor; 22, sheath; 30, wire protection structure; 301, first end; 302, second end; 31, first receiving cavity; 32, second receiving cavity; 321, limiting protrusion; 33, connecting part; 331, partition cavity; 40, encapsulation layer. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] As shown in Figures 1 to 11, Embodiment 1 of this application provides a coil component, which includes a coil body 10, a conductor assembly 20, and a sheath structure 30. The conductor assembly 20 includes a conductor 21 and a sheath 22. The conductor 21 is directly or indirectly electrically connected to the coil body 10, and the sheath 22 is sleeved on the outside of the conductor 21. The sheath structure 30 is sleeved on the conductor assembly 20 and is disposed close to the coil body 10. The sheath structure 30 has a pressing part, which is sleeved on the outside of the sheath 22. The pressing part can press the conductor 21 and the sheath 22 to limit their relative positions.

[0049] Using the technical solution of this application, the conductor 21 is electrically connected to the coil body 10, the sheath 22 is sleeved on the outside of the conductor 21, and the extrusion part of the wire protection structure 30 is sleeved on the outside of the sheath 22. The extrusion part can extrude the conductor 21 and the sheath 22, thereby limiting the relative position of the conductor 21 and the sheath 22. This can prevent the conductor assembly 20 from being squeezed by external force or from gaps between the sheath 22 and the conductor 21 at the extrusion part position caused by the injection pressure during injection molding. This can prevent the molding compound from flowing through the gap between the sheath 22 and the conductor 21 to the downstream of the position where the conductor assembly 20 is squeezed by the extrusion part, prevent the molding compound from melting the sheath 22 and the conductor 21, ensure the insulation performance of the coil components, and reduce the risk of electrical failure.

[0050] As shown in Figures 1 to 5, the X direction represents the width direction, and the Y direction represents the thickness direction. As shown in Figure 1, in this application, the dimensions of the wire assembly 20 differ along the thickness and width directions; the dimension of the wire assembly 20 in the thickness direction is smaller than its dimension in the width direction. As shown in Figure 2, the dimensions of the wire assembly 20 are the same along the thickness and width directions. This application primarily addresses the problems associated with injection molding wire assemblies 20 with different dimensions in the thickness and width directions. However, when wire assemblies 20 with the same dimensions in the thickness and width directions also exhibit the aforementioned problems, the above method can also be used to solve them.

[0051] Before the conductor assembly 20 and the coil body 10 are injection molded in one step, a wire protection structure 30 is provided on the conductor assembly 20. The wire protection structure 30 can be integrally injection molded with the sheath 22, or the wire protection structure 30 can be separately processed and then installed on the outside of the sheath 22.

[0052] Specifically, during the injection molding of the conductor assembly 20 and the coil body 10, part of the conductor assembly 20 is located in the mold. Without the protective wire structure 30, the conductor assembly 20 deforms under the influence of injection pressure, creating a gap between the sheath 22 and the conductor 21. The molding compound enters the sheath 22 through the gap between the sheath 22 and the conductor 21. The molding compound flows along the inside of the sheath 22. Due to the high injection pressure and high temperature of the molding compound, the sheath 22 is easily melted by the high temperature, and the molding compound overflows from the melted position; or during the injection process, the molding compound partially solidifies during the flow. The solidified molding compound can easily cut the sheath 22, and the subsequently flowing molding compound continues to flow and overflows from the cut position. With the above structure, the protective wire structure 30 can prevent the molding compound from flowing downstream of the position where the conductor assembly 20 is squeezed by the extrusion part, thereby preventing the molding compound from melting or cutting the sheath 22 and ensuring the insulation performance of the coil component.

[0053] As shown in Figures 3 and 4, the wire sheath structure 30 has a first receiving cavity 31, a compression portion located in the first receiving cavity 31, and a conductor assembly 20 passing through the first receiving cavity 31. At least a portion of the conductor 21 and the sheath 22 are located within the compression portion. Optionally, in other embodiments, multiple compression protrusions may be provided within the first receiving cavity 31 to form the compression portion, and the multiple compression protrusions cooperate to compress the conductor 21 and the sheath 22. In this embodiment, the wire sheath structure 30 has a thickness direction and a width direction arranged opposite to each other, i.e., as shown in Figures 1 to 5, the X direction is the width direction and the Y direction is the thickness direction. Specifically, at the location of the compression portion, the dimension of the first receiving cavity 31 along the thickness direction is smaller than the dimension of the conductor assembly 20 along the thickness direction, and / or, the dimension of the first receiving cavity 31 along the width direction is smaller than the dimension of the conductor assembly 20 along the width direction. With this configuration, the first receiving cavity 31 can compress the sheath 22, causing it to deform and reducing the enclosing area formed by the inner ring of the sheath 22. This allows the sheath 22 to fit more tightly against the conductor 21. Furthermore, when the conductor assembly 20 is subjected to external pressure, the compression effect of the compression portion prevents gaps from forming between the sheath 22 and the conductor 21 at the compressed location, thus preventing the molding compound from entering through these gaps and flowing downstream of the compressed location on the conductor assembly 20. Moreover, using the above method, the wire protection structure 30 has a simple structure and is easy to process.

[0054] As shown in Figures 1 to 7, in this application, at the location of the extrusion section, the dimension b2 of the first receiving cavity 31 along the thickness direction is smaller than the dimension b1 of the wire assembly 20 along the thickness direction, and the dimension a2 of the first receiving cavity 31 along the width direction is larger than the dimension a1 of the wire assembly 20 along the width direction. Furthermore, when the dimensions of the wire assembly 20 differ in the thickness and width directions (i.e., when the dimension of the wire assembly 20 in the thickness direction is smaller than its dimension in the width direction), the dimension b2 of the first receiving cavity 31 along the thickness direction is smaller than the dimension a2 of the first receiving cavity 31 along the width direction, and the dimension b1 of the wire assembly 20 along the thickness direction is smaller than the dimension a1 of the wire assembly 20 along the width direction. The wire 21 and the sheath 22 are made of flexible materials. With this configuration, when the dimensions of the lead assembly 20 are different in the thickness and width directions, the lead assembly 20 is more likely to deform along the thickness direction but less likely to deform in the width direction. When the lead assembly 20 is squeezed by the extrusion part, the sheath 22 mainly deforms along the thickness direction. The sheath 22 will deform to some extent in the width direction, but since the deformation space along the width direction is limited and it is difficult to deform along the width direction, the sheath 22 will basically not deform in the width direction during the subsequent injection molding process. This can further avoid the gap between the sheath 22 and the lead 21.

[0055] As shown in Figures 1 and 5, when the dimensions of the conductor assembly 20 differ in the thickness and width directions, at the extrusion section, the dimension b2 of the first receiving cavity 31 along the thickness direction is smaller than the dimension b1 of the conductor assembly 20 along the thickness direction, 0 < b1 - b2 < 0.4 mm; the dimension a2 of the first receiving cavity 31 along the width direction is larger than the dimension a1 of the conductor assembly 20 along the width direction, a2 - a1 > 1 mm. With this configuration, when b1 - b2 is greater than 0.4 mm and a2 - a1 is less than 1 mm, the dimensions of the first receiving cavity 31 along both the thickness and width directions are too small. During the extrusion process, the deformation of the conductor assembly 20 is excessive, increasing the processing or assembly difficulty of the conductor assembly 20 and the wire protection structure 30. Furthermore, the excessive extrusion force exerted by the wire protection structure 30 on the conductor assembly 20 will affect the working performance of the conductor 21. Therefore, in this application, b1-b2 is less than 0.4mm and a2-a1 is greater than 1mm. With this setting, when the conductor assembly 20 is extruded, excessive deformation of the conductor assembly 20 can be avoided, reducing the processing or assembly difficulty of the conductor assembly 20 and the wire protection structure 30, ensuring the working effect of the conductor 21. Furthermore, the wire protection structure 30 and the conductor assembly 20 have a gap in the width direction, allowing the injection molding material to pass through the gap between the wire protection structure 30 and the conductor assembly 20, thus reducing the injection molding pressure at the position of the conductor assembly 20.

[0056] In some embodiments, at the extrusion section, the difference between the dimension b1 of the lead assembly 20 along the thickness direction and the dimension b2 of the first receiving cavity 31 along the thickness direction can be 0.1 mm, 0.2 mm, or 0.4 mm. At the extrusion section, the difference between the dimension a2 of the first receiving cavity 31 along the width direction and the dimension a1 of the lead assembly 20 along the width direction can be 1.2 mm, 1.5 mm, or 2 mm.

[0057] In some embodiments, at the extrusion section, the first receiving cavity 31 and the lead assembly 20 are interference-fitted in the thickness direction, and / or, the first receiving cavity 31 and the lead assembly 20 are interference-fitted in the width direction. In this application, the first receiving cavity 31 and the lead assembly 20 are interference-fitted in the thickness direction, and the first receiving cavity 31 and the lead assembly 20 are clearance-fitted in the width direction, with a maximum interference amount of no more than 0.2 mm on one side and a clearance amount of 0.5 mm or more on one side. This configuration enhances the fixing effect of the wire protection structure 30 on the lead assembly 20 and avoids the gap between the sheath 22 and the lead 21 at the interference-fit position. The gap between the first receiving cavity 31 and the lead assembly 20 is used for material flow during injection molding, reducing injection pressure.

[0058] In some embodiments, the wire sheath structure 30 has a first end 301 and a second end 302 disposed opposite to each other. Along the extending direction of the wire assembly 20, the first end 301 is disposed away from the coil body 10 relative to the second end 302. One end of the wire assembly 20 for electrical connection with the coil body passes sequentially through the first end 301 and the second end 302. Specifically, in this embodiment, the first end 301 and the second end 302 are located on both sides of the first receiving cavity 31 along the axial direction of the wire sheath structure 30. The sheath structure 30 and the conductor assembly 20 can be interference-fitted at the first end 301, i.e., the compression part is located at the first end 301 of the first receiving cavity 31; or they can be interference-fitted at any position from the first end 301 to the second end 302, i.e., the compression part is located at any position from the first end 301 to the second end 302; or the entire first receiving cavity 31 of the sheath structure 30 and the conductor assembly 20 can be interference-fitted, i.e., the compression part is located on the entire first receiving cavity 31 of the sheath structure 30. Regardless of where the compression part is located in the first receiving cavity 31, as long as the compression part is interference-fitted with the conductor assembly 20 in the thickness and / or width direction, it can prevent the sheath 22 and the conductor 21 of the conductor assembly 20 from forming gaps in the thickness and / or width direction at the compression position.

[0059] As shown in Figures 10 and 11, the coil component also includes an encapsulation layer 40. The encapsulation layer 40 at least encapsulates the electrical connection between the coil body 10 and the conductor assembly 20, and at least partially encapsulates the conductor assembly 20. The compression portion is located within the encapsulation layer 40. With this configuration, the encapsulation layer 40 effectively isolates the conductor assembly 20 from the external environment, enhancing electrical insulation performance and preventing short circuits or leakage. Simultaneously, since the compression portion is located within the encapsulation layer 40, the encapsulation layer 40 protects the compression portion, preventing failure of its compression performance.

[0060] Furthermore, the sheath structure 30 is at least partially fitted onto the sheath 22 of the conductor assembly 20. After the coil body 10 and the conductor assembly 20 are electrically connected, the assembly of the two is injection molded to form a coil component. The sheath structure 30, at least between the extrusion portion and the end of the second end 302, is located inside the encapsulation layer 40. Thus, the end from the extrusion portion to the second end 302 is encapsulated by injection molding. Even if there is a gap between the sheath 22 and the conductor 21, and the molding compound enters through this gap, it cannot flow downstream of the extrusion portion inside the sheath 22 through the extrusion portion. Even if the molding compound inside the sheath 22 melts or cuts the conductor, the molding compound inside the sheath 22 and the outside of the broken part of the sheath 22 are both encapsulated by the encapsulation layer 40, which will not cause insulation failure of the coil component.

[0061] In some embodiments, the wire protection structure 30 may be completely encapsulated in the encapsulation layer 40 to improve the insulation performance of the coil components.

[0062] In some embodiments, the coil body 10 is at least partially covered in the encapsulation layer 40, the coil body 10 having a stator housing, windings, stator plates, etc., and the encapsulation layer 40 encapsulates at least a portion of the outer peripheral surface of the stator housing.

[0063] In some embodiments, the coil body 10 and the lead assembly 20 can be electrically connected via a circuit board or terminals, or they can be directly electrically connected via pins of the coil body 10 and the lead assembly 20. The downstream end of the extrusion section is farther from the end where the lead assembly 20 and the coil body 10 are electrically connected, i.e., the downstream end of the extrusion section is farther from the second end 302 relative to the extrusion section. The upstream end of the extrusion section is closer to the end where the lead assembly 20 and the coil body 10 are electrically connected, i.e., the upstream end of the extrusion section is farther from the first end 301 relative to the extrusion section.

[0064] In some embodiments, when the conductor assembly 20 has the same dimensions in the thickness direction and the width direction, the thickness dimension b1 and the width dimension a1 of the conductor assembly 20 are equal. In this case, the extrusion part of the wire protection structure 30 and the conductor assembly 20 are in at least one direction of interference fit, and in the other direction of interference fit or clearance fit. When there is a clearance fit, the clearance on one side does not exceed 0.2 mm.

[0065] As shown in Figures 12 to 18, Embodiment 2 of this application provides a coil component. The difference from Embodiment 1 is that the wire sheath structure 30 has a second receiving cavity 32. The second receiving cavity 32 is disposed near the coil body 10 relative to the first receiving cavity 31. The second receiving cavity 32 is used to accommodate the wire 21. The second end 302 is located in the second receiving cavity 32, and the pressing part is disposed at any position along the axial direction of the first receiving cavity 31. A limiting protrusion 321 is provided on the side wall of the second receiving cavity 32. The limiting protrusion 321 abuts against the end of the sheath 22 at the electrical connection point between the wire assembly 20 and the coil body 10 to limit the position of the wire assembly 20. That is, at the connection position between the lead assembly 20 and the coil body 10, a portion of the lead wire 21 is exposed outside the sheath 22. The limiting protrusion 321 abuts against the end of the sheath 22 near the coil body 10. The limiting protrusion 321 can limit the relative position of the lead wire 21 and the wire protection structure 30. This ensures the stability of the lead assembly 20 during assembly and injection molding, avoids electrical connection problems caused by positional misalignment, and improves the accuracy and reliability of the electrical connection. With this configuration, the limiting protrusion 321 also acts as a shield for the molding compound, further preventing the molding compound from entering the interior of the lead assembly 20.

[0066] In this configuration, the second receiving cavity 32 has a thickness dimension smaller than the first receiving cavity 31, and its width dimension is greater than or equal to that of the first receiving cavity 31. Alternatively, the second receiving cavity 32 has a thickness dimension greater than or equal to that of the first receiving cavity 31, and its width dimension is smaller than that of the first receiving cavity 31. This configuration creates a limiting protrusion 321 in the portion of the second receiving cavity 32 protruding from the first receiving cavity 31. While ensuring the limiting protrusion 321 effectively limits the position of the lead assembly 20, the segmented structure of the second receiving cavity 32 and the first receiving cavity 31 helps alleviate injection molding pressure.

[0067] In some embodiments, the outer diameter of the second receiving cavity 32 is larger than the outer diameter of the first receiving cavity 31. This arrangement makes it easier for workers to distinguish between the second receiving cavity 32 and the first receiving cavity 31, and reduces the assembly difficulty of the wire protection structure 30 and the wire assembly 20.

[0068] As shown in Figures 13 and 14, the thickness dimension b3 of the second receiving cavity 32 is greater than or equal to the diameter D1 of the wire 21 and less than the thickness dimension b2 of the first receiving cavity 31, where D1 ≤ b3 < b2. This arrangement prevents the second receiving cavity 32 from compressing the wire 21, facilitates the installation of the wire assembly 20, ensures the normal operation of the wire 21, and also ensures the effect of the limiting protrusion 321 in blocking the injection molding material, reducing the amount of molding compound entering the wire assembly 20. The width dimension a3 of the second receiving cavity 32 is greater than or equal to the width dimension a2 of the first receiving cavity 31, where a2 ≤ a3. This arrangement further ensures the smooth flow of the injection molding material within the second receiving cavity 32 and the first receiving cavity 31, further reducing the injection molding pressure.

[0069] In some embodiments, when the conductor assembly 20 has the same thickness dimension b1 and width dimension a1, then a3 < a2; or b3 < b2; or a3 < a2 and b3 < b2, so that the limiting protrusion 321 can abut against the end of the sheath 22.

[0070] As shown in Figures 19 to 25, Embodiment 3 of this application provides a coil component. The difference from Embodiment 2 is that the wire protection structure 30 further includes a connecting part 33. The connecting part 33 is used to limit the relative position of the wire assembly 20 and the coil body 10. Specifically, the coil body 10 also includes a pin. The connecting part 33 is used to limit the relative position of the wire 21 and the pin. This arrangement can prevent the electrical connection between the wire 21 and the coil body 10 from failing, ensure the stability of the connection between the wire assembly 20 and the coil body 10, reduce the risk of poor contact or short circuit, and ensure the normal function and performance of the coil component.

[0071] As shown in Figures 21 and 22, the connecting part 33 engages with the coil body 10, that is, the connecting part 33 has a hook that engages with the snap-fit ​​groove of the coil body 10. Specifically, the coil body 10 also includes a stator housing and a frame. The snap-fit ​​groove can be provided on the stator housing or on the frame. This arrangement enables quick and convenient assembly of the connecting part 33 and the coil body 10, while ensuring a stable connection between the conductor assembly 20 and the coil body 10. This reduces loosening or detachment caused by vibration or external impact, and improves the reliability and durability of the coil components in complex working environments.

[0072] As shown in Figures 21 and 22, the conductor assembly 20 includes multiple conductors 21, with a sheath 22 fitted over the outside of each conductor 21. The connecting portion 33 has multiple independently configured partition cavities 331, each corresponding to one of the conductors 21, with each conductor 21 located within its corresponding partition cavity 331. This arrangement ensures that each conductor 21 is located within an independent partition cavity 331, avoiding direct contact between conductors 21, significantly enhancing the insulation performance of the electrical system, reducing the risk of short circuits, and improving overall electrical safety.

[0073] Embodiment 4 of this application provides a coil component, which differs from Embodiment 1 in that the wire protection structure 30 further includes a connecting portion 33, which is detachably connected to the coil body 10 to limit the relative position of the wire assembly 20 and the coil body 10. This configuration limits the relative arrangement between the wire assembly 20 and the coil body 10, preventing electrical connection failure between the wire 21 and the coil body 10, and simultaneously allows for compression of the wire assembly 20 to prevent injection molding compound from flowing into the wire assembly 20.

[0074] Embodiment 5 of this application provides an electronic expansion valve, which includes the coil component described above. This configuration, using the coil component, prevents the molding compound from melting the sheath 22 and the wire 21 during injection molding, reducing the risk of electrical failure and thus improving the reliability of the electronic expansion valve.

[0075] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coil component, characterized in that, The coil component includes: Coil body (10); A conductor assembly (20) includes a conductor (21) and a sheath (22). The conductor (21) is directly or indirectly electrically connected to the coil body (10), and the sheath (22) is sleeved on the outside of the conductor (21). A wire protection structure (30) is sleeved on the conductor assembly (20) and the wire protection structure (30) is disposed close to the coil body (10). The wire protection structure (30) has a compression part, which is sleeved on the outside of the sheath (22). The compression part can compress the conductor (21) and the sheath (22) to limit the relative position of the conductor (21) and the sheath (22).

2. The coil component according to claim 1, characterized in that, The wire protection structure (30) has a first receiving cavity (31), the extrusion part is located in the first receiving cavity (31), the conductor assembly (20) passes through the first receiving cavity (31), at least part of the conductor (21) and the sheath (22) are located in the extrusion part, the first receiving cavity (31) has a thickness direction and a width direction arranged opposite to each other, in the extrusion part, the dimension of the first receiving cavity (31) in the thickness direction is smaller than the dimension of the conductor assembly (20) in the thickness direction, and / or, the dimension of the first receiving cavity (31) in the width direction is smaller than the dimension of the conductor assembly (20) in the width direction.

3. The coil component according to claim 2, characterized in that, In the extrusion section, the dimension b2 of the first receiving cavity (31) along the thickness direction is smaller than the dimension b1 of the wire assembly (20) along the thickness direction, 0 < b1 - b2 < 0.4 mm; the dimension a2 of the first receiving cavity (31) along the width direction is larger than the dimension a1 of the wire assembly (20) along the width direction, a2 - a1 > 1 mm.

4. The coil component according to claim 2, characterized in that, In the extrusion section, the first receiving cavity (31) is interference-fitted with the wire assembly (20) in the thickness direction, and / or the first receiving cavity (31) is interference-fitted with the wire assembly (20) in the width direction.

5. The coil component according to claim 1, characterized in that, The coil component also includes: Encapsulation layer (40) at least encapsulates the electrical connection between the coil body (10) and the conductor assembly (20), and the encapsulation layer (40) at least encapsulates a portion of the conductor assembly (20), the extrusion portion being located within the encapsulation layer (40).

6. The coil component according to claim 2, characterized in that, The wire protection structure (30) has a second receiving cavity (32), which is located near the coil body (10) relative to the first receiving cavity (31). A limiting protrusion (321) is provided on the side wall of the second receiving cavity (32), and the limiting protrusion (321) abuts against the end of the sheath (22) on the wire assembly (20) and the end electrically connected to the coil body (10) to limit the position of the wire assembly (20).

7. The coil component according to claim 6, characterized in that, The second receiving cavity (32) has a thickness dimension smaller than the first receiving cavity (31) in the thickness direction, and the second receiving cavity (32) has a width dimension greater than or equal to the first receiving cavity (31) in the width direction; or, the second receiving cavity (32) has a thickness dimension greater than or equal to the first receiving cavity (31) in the thickness direction, and the second receiving cavity (32) has a width dimension smaller than the first receiving cavity (31) in the width direction.

8. The coil component according to claim 7, characterized in that, The second receiving cavity (32) has a thickness dimension b3 that is greater than or equal to the diameter D1 of the wire (21) and less than the thickness dimension b2 of the first receiving cavity (31), where D1≤b3<b2; the second receiving cavity (32) has a width dimension a3 that is greater than or equal to the width dimension a2 of the first receiving cavity (31), where a2≤a3.

9. The coil component according to claim 1, characterized in that, The wire protection structure (30) further includes a connecting part (33), which is fixedly connected to the coil body (10) to limit the relative position of the conductor assembly (20) and the coil body (10).

10. The coil component according to claim 9, characterized in that, The connecting part (33) engages with the coil body (10).

11. The coil component according to claim 9, characterized in that, The conductor assembly (20) includes multiple conductors (21), the sheath (22) is sleeved on the outside of the multiple conductors (21), the connecting part (33) has multiple independently arranged partition cavities (331), the multiple partition cavities (331) are arranged one-to-one with the multiple conductors (21), and the conductors (21) are located in the corresponding partition cavities (331).

12. An electronic expansion valve, characterized in that, The electronic expansion valve includes the coil component as described in any one of claims 1 to 11.

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