Coil component and electric valve having same

Abstract

Provided in the present application are a coil component and an electric valve having same. The coil component comprises: a stator housing having an accommodating cavity, wherein the circumferential side wall of the stator housing is provided with a passing opening and limiting structures, which are in communication with each other, the limiting structures are located at the ends of the passing opening in the circumferential direction of the stator housing, and the part of the circumferential side wall of the stator housing located outside the passing opening and the limiting structures is of a sealed structure; a framework, wherein one portion of the framework is arranged in the accommodating cavity, and the other portion of the framework extends out of the accommodating cavity through the passing opening; and a stator pole plate connected to the framework, wherein at least a portion of the stator pole plate is located in the accommodating cavity, the stator pole plate has limiting portions, and the limiting portions are in limiting fit with the limiting structures. By means of the technical solution provided in the present application, the problem in the prior art of a positioning fit method between a stator housing and a stator pole plate based on multiple notches requiring the provision of multiple notches on the stator housing, resulting in a relatively complex manufacturing process for the stator pole plate and the stator housing, can be solved.

Description

Coil components and electric valves having them

[0001] This application claims priority to the patent application filed on March 25, 2025, with China National Intellectual Property Administration, application number 202520538167.7, entitled "Coil Component and Electric Valve Having Therethe". Technical Field

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

[0003] Currently, the coil assembly in electric valves, mainly consisting of the stator housing and stator plates, is a crucial component for achieving precise flow control. In traditional electric valve designs, to ensure accurate positioning of the stator plates within the stator housing, multiple notches are typically provided around the circumference of the stator housing. These notches engage with the protrusions on the stator plates to form a positioning fit.

[0004] However, the above positioning method requires setting more notches in the circumferential direction of the stator housing, which makes the connection area between the stator plate and the stator housing more complex. This leads to more complex processing technology for the stator plate and the stator housing, higher requirements for processing accuracy, increased processing difficulty and cost, and reduced production efficiency. Summary of the Invention

[0005] This application provides a coil component and an electric valve having the same, to solve the problem in the prior art that the positioning and mating method of the stator shell and stator plate based on the multi-notch stator shell requires opening more notches on the stator shell, resulting in a more complicated processing technology for the stator plate and stator shell.

[0006] According to one aspect of this application, a coil component is provided, comprising: a stator housing having a receiving cavity, wherein a through-hole and a limiting structure are provided on the circumferential sidewall of the stator housing, the limiting structure being located at the circumferential end of the through-hole of the stator housing, and the portion of the circumferential sidewall of the stator housing outside the through-hole and the limiting structure being a sealed structure; a frame, wherein a portion of the frame is disposed within the receiving cavity, and another portion of the frame extends out of the receiving cavity from the through-hole; and a stator electrode plate connected to the frame, wherein at least a portion of the stator electrode plate is located within the receiving cavity, and the stator electrode plate having a limiting portion that is limited and engaged with the limiting structure.

[0007] Furthermore, the limiting structure is a limiting groove, and there are two limiting structures. The two limiting structures are located at the two ends of the circumferential direction of the stator shell through the opening. Two protrusions are provided at intervals along the circumferential direction of the stator plate. The two protrusions form two limiting parts, and each protrusion is limited and engaged with the corresponding limiting structure.

[0008] Furthermore, in the axial direction of the stator housing, there is a material-accommodating gap between the sidewall of the limiting structure and the limiting part; in the axial direction of the stator housing, the size of the limiting structure is smaller than the size of the through-hole.

[0009] Furthermore, in the axial direction of the stator housing, the length of the material gap is H, 0.3mm≤H≤2mm; in the circumferential direction of the stator housing, the length of the opening is L, and the length of the limiting structure is C, 1mm≤C≤0.25L.

[0010] Furthermore, the bottom wall of the limiting structure extends axially along the stator housing, the side wall of the limiting structure extends circumferentially along the stator housing, and the connection between the bottom wall and the side wall of the limiting structure has a transition surface.

[0011] Furthermore, at least one flow guide hole is provided along the circumference of the stator housing at the edge of the stator electrode plate, and the flow guide hole connects the space on both sides of the stator electrode plate along the axial direction of the stator housing.

[0012] Furthermore, in the radial direction of the stator housing, the cross-sectional area of ​​the guide hole is S, 1.5 mm. 2 ≤S≤7mm 2 .

[0013] Furthermore, the stator housing includes an upper housing and a lower housing connected to each other. The upper housing and the lower housing are coaxially arranged. The side wall of the upper housing has a first notch, and the side wall of the lower housing has a second notch. The first notch and the second notch are correspondingly arranged, and the first notch and the second notch cooperate to form a passage. A third notch is provided at the end of the first notch along the circumferential direction of the stator housing. The first notch and the third notch are connected. A fourth notch is provided at the end of the second notch along the circumferential direction of the stator housing. The second notch and the fourth notch are connected. The third notch and the fourth notch are correspondingly arranged, and the third notch and the fourth notch cooperate to form a limiting structure.

[0014] Furthermore, the stator electrode plate includes an upper electrode plate and a lower electrode plate, which are coaxially arranged. The upper electrode plate includes a first electrode plate and a plurality of first electrode teeth, and the lower electrode plate includes a second electrode plate and a plurality of second electrode teeth. The first electrode plate abuts against the second electrode plate, and the plurality of first electrode teeth and the plurality of second electrode teeth are respectively located inside the frame. The upper electrode plate is provided with two first protrusions spaced apart, and the lower electrode plate is provided with two second protrusions spaced apart. The two first protrusions and the two second protrusions are arranged in a one-to-one correspondence. Among them, one first protrusion and one second protrusion cooperate to form a protrusion.

[0015] Furthermore, the coil component also includes an encapsulation layer, an upper waterproof shell, and a lower waterproof shell. The upper waterproof shell is fitted around the outer periphery of the upper housing, and the lower waterproof shell is fitted around the outer periphery of the lower housing. The encapsulation layer is disposed between the upper and lower waterproof shells along the circumferential direction of the stator housing, and the encapsulation layer encapsulates the interface between the upper and lower housings.

[0016] Furthermore, the interface divides the encapsulation layer into two symmetrical parts; the part of the upper waterproof shell that encapsulates the outer peripheral surface of the stator shell is the upper peripheral surface, and the part of the lower waterproof shell that encapsulates the outer peripheral surface of the stator shell is the lower peripheral surface. The upper and lower peripheral surfaces are symmetrically arranged relative to the interface.

[0017] According to another aspect of this application, an electric valve is provided, the electric valve including the aforementioned coil component.

[0018] By applying the technical solution of this application, the limiting structure and the limiting part on the stator plate cooperate to limit the relative rotation between the stator plate and the stator shell caused by vibration or external force during the operation of the coil components, thereby improving the overall structural stability and reliability of the coil components. In the prior art, there are many notches machined in the circumferential direction of the stator shell, the processing process is more complicated, and local stress concentration is prone to occur during injection molding, resulting in insufficient filling of the injection plastic at the notch, leading to bubbles, voids, etc., which in turn leads to a decrease in insulation performance and magnetic field leakage at the notch. This application designs the part of the circumferential sidewall of the stator shell outside the passage and the limiting structure as a sealed structure. In this way, only one notch consisting of the interconnected limiting structure and the passage is needed to machine the circumferential sidewall of the stator shell. This not only allows the injection plastic to fill the passage and limiting structure more evenly and fully, optimizing the electrical performance of the coil components, but also simplifies the design and manufacturing process of the stator shell by reducing the number of notches on the circumferential sidewall of the stator shell, reducing the processing complexity and production cost. Attached Figure Description

[0019] 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:

[0020] Figure 1 shows a schematic diagram of the structure of the coil component provided in this application;

[0021] Figure 2 shows a schematic diagram of the coil component provided in this application from a side view.

[0022] Figure 3 shows a magnified view of a portion of point A in Figure 2;

[0023] Figure 4 shows a schematic diagram of the structure of the lower shell provided in this application;

[0024] Figure 5 shows a partial structural schematic diagram of the coil component provided in this application;

[0025] Figure 6 shows a schematic diagram of the upper electrode plate provided in this application;

[0026] Figure 7 shows a partial structural schematic diagram of the coil component provided in this application;

[0027] Figure 8 shows a partial cross-sectional view of the coil component provided in this application.

[0028] The above-mentioned figures include the following reference numerals: 110, stator housing; 1101, through port; 1102, limiting structure; 111, upper housing; 112, lower housing; 120, frame; 121, upper frame; 122, lower frame; 130, stator electrode plate; 131, protrusion; 132, guide hole; 133, upper electrode plate; 1331, first protrusion; 134, lower electrode plate; 1341, second protrusion; 140, coil; 141, upper coil; 142, lower coil; 150, pin; 160, material gap; 210, upper waterproof shell; 212, waterproof cover; 220, lower waterproof shell; 420, encapsulation layer; 500, conductor. Detailed Implementation

[0029] 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.

[0030] As shown in Figures 1 to 7, this application embodiment provides a coil component, which includes a stator housing 110, a frame 120, and a stator electrode plate 130. The stator housing 110 has a receiving cavity. A through-hole 1101 and a limiting structure 1102 are provided on the circumferential sidewall of the stator housing 110. The limiting structure 1102 is located at the end of the through-hole 1101 along the circumferential direction of the stator housing 110. The portion of the circumferential sidewall of the stator housing 110 outside the through-hole 1101 and the limiting structure 1102 is a sealed structure. The portion of the circumferential sidewall of the stator housing 110, except for the through-hole 1101 and the limiting structure 1102, has no gaps, meaning that no injection molding compound can enter or pass through the portion of the circumferential sidewall of the stator housing 110 other than the through-hole 1101 and the limiting structure 1102. A coil 140 is wound around the frame 120. Part of the frame 120 is disposed inside the receiving cavity, while another part of the frame 120 extends out of the receiving cavity from the through-hole 1101. A pin 150 is fixed on the frame 120 located outside the receiving cavity. After the pin 150 is electrically connected to an external control circuit, it transmits an electrical signal to the coil 140, causing the coil 140 to generate a magnetic field. The stator plate 130 is connected to the frame 120, and at least a part of the stator plate 130 is located inside the receiving cavity. The stator plate 130 has a limiting part, which is matched with the limiting structure 1102 for limiting.

[0031] By applying the technical solution of this application, the limiting structure 1102 and the limiting part on the stator plate 130 are matched in a limiting manner, which can reduce the relative rotation between the stator plate 130 and the stator housing 110 caused by vibration or external force during the operation of the coil components, thereby improving the overall structural stability and reliability of the coil components. In the prior art, the stator housing 110 has many notches machined in the circumferential direction, the processing is more complicated, and local stress concentration is prone to occur during injection molding, resulting in insufficient filling of the injection plastic at the notches, producing air bubbles, voids, etc., which in turn leads to magnetic field leakage and decreased insulation performance at the notches. This application designs the portion of the circumferential sidewall of the stator housing 110 outside the access port 1101 and the limiting structure 1102 as a sealed structure. This way, only one notch consisting of the interconnected limiting structure 1102 and the access port 1101 needs to be machined on the circumferential sidewall of the stator housing 110. This not only allows the injection molding material to fill the access port 1101 and the limiting structure 1102 more evenly and fully, optimizing the electrical performance of the coil components, but also simplifies the design and manufacturing process of the stator plates by reducing the notch on the circumferential sidewall of the stator housing 110, reducing the complexity of processing and production costs.

[0032] In this application, the specific structure of the limiting part is not limited. It can be set as a slot, fastener or protrusion, as long as it can be used to limit the limiting structure 1102. The limiting structure 1102 can be a slot or hole structure.

[0033] In this embodiment, along the axial direction of the stator housing 110, the projection of the end of the limiting portion along the radial direction of the stator housing 110 coincides with the projection of the edge of the circumferential sidewall of the stator housing 110.

[0034] In other embodiments, along the circumferential direction of the stator housing 110, the end of the limiting portion in the radial direction of the stator housing 110 protrudes from the circumferential sidewall of the stator housing 110.

[0035] As shown in Figures 4 and 5, the limiting structure 1102 is a limiting groove. There are two limiting structures 1102, located at opposite ends of the passage 1101 along the circumference of the stator housing 110. Two protrusions 131 are spaced apart along the circumference of the stator housing 110 on the edge of the stator plate 130, forming two limiting portions. Each protrusion 131 engages with a corresponding limiting structure 1102. The engagement of the two protrusions 131 with the two limiting structures 1102 not only limits the position of the stator plate 130 in both clockwise and counterclockwise directions along the circumference of the stator housing 110, but also provides additional support points for the stator plate 130. This ensures precise alignment between the stator plate 130 and the stator housing 110, effectively preventing displacement or vibration of the stator plate 130 during operation or under stress, reducing electrical performance fluctuations caused by mechanical movement, and improving the positioning accuracy and overall structural stability of the coil components. Furthermore, the simple structure of the protrusion 131 improves the ease of processing and assembly.

[0036] In this application, the specific structure of the protrusion 131 is not limited. It can be set as a wedge structure, a curved structure, etc., to engage with the limiting structure 1102, as long as it can engage with the limiting structure 1102.

[0037] In this embodiment, the protrusion 131 has a groove on the side away from the pin 150, which facilitates the machining of the protrusion 131. In other embodiments, the protrusion 131 protrudes directly from the circumferential edge of the stator plate 130 without machining a groove.

[0038] As shown in Figure 2, in the axial direction of the stator housing 110, the limiting structure 1102 has a material-accommodating gap 160 between the side wall of the stator housing 110 and the limiting part along the circumferential direction of the stator housing 110. The setting of the material-accommodating gap 160 provides a tolerance space for the assembly between the stator electrode plate 130 and the stator housing 110, reducing the occurrence of interference fit between the stator electrode plate 130 and the stator housing 110 due to manufacturing tolerances or assembly errors. This makes the assembly process smoother, reduces the risk of component damage during assembly, and improves assembly quality and production efficiency.

[0039] Furthermore, in the axial direction of the stator housing 110, the size of the limiting structure 1102 is smaller than the size of the through-hole 1101. The notch at the through-hole 1101 is relatively large. In the prior art, the injection molding material at this location is relatively thick after injection molding. Thus, during cooling, the outer injection molding material cools before the inner injection molding material. When the inner injection molding material at the through-hole 1101 begins to cool, it generates a contraction force and is simultaneously subjected to a pulling force from the coil 140 inside the stator housing 110 and the pulling force from the pin 150 outside the stator housing 110. As a result, the inner injection molding material at the through-hole 1101 experiences uneven stress, which can easily lead to injection molding defects such as pores during cooling. With the above-described configuration, during the injection molding process, the injection plastic fills the through-hole 1101 and the limiting structure 1102, including the aforementioned material gap 160. Since the size of the limiting structure 1102 is smaller than that of the through-hole 1101, the amount of injection plastic filling the material gap 160 region is relatively less than that at the through-hole 1101, and it cools down before the injection plastic inside the through-hole 1101. Thus, when the injection plastic inside the through-hole 1101 begins to cool and shrink, it increases the pulling force from the injection plastic at the material gaps 160 on both sides, making the force on the injection plastic inside the through-hole 1101 more uniform, thereby reducing the shrinkage of the injection plastic inside the through-hole 1101, reducing the formation of air holes in the injection plastic at the through-hole 1101, and thus improving the insulation and electrical performance of the coil component.

[0040] Specifically, in the axial direction of the stator housing 110, the length of the material gap 160 is H, where 0.3mm ≤ H ≤ 2mm. If H is greater than 2mm, the material gap 160 is too large, and the injection molding material may flow unevenly at the material gap 160 during the injection molding process, leading to injection molding defects such as voids and bubbles, affecting the electrical performance and mechanical strength of the coil components. If H is less than 0.3mm, the material gap 160 is too small, which may not only cause interference fits due to tolerance accumulation during assembly, leading to assembly difficulties and even damage to parts, but also make it difficult for the injection molding material to pass through the material gap 160 during injection molding, thus losing the optimized injection molding effect at the through-hole 1101. Therefore, in this application, 0.3mm ≤ H ≤ 2mm is used. This setting provides sufficient tolerance space for the stator housing 110 and the stator electrode plate 130, ensuring smooth assembly and non-destructive fit of parts, and also ensures smooth flow and uniform filling of the injection molding material during the injection molding process, optimizing the injection molding effect at the through-hole 1101. In this application, H can be 0.5mm, 0.6mm, 0.9mm or 1mm.

[0041] As shown in Figure 5, in the circumferential direction of the stator housing 110, the length of the opening 1101 is L, and the length of the limiting structure 1102 is C, where 1mm ≤ C ≤ 0.25L. If C is greater than 0.25L, it means that the stator housing 110 has a long gap in the circumferential direction, which can easily disrupt the uniformity of the injection molding process and may cause the injection molding material to accumulate in this area, forming injection molding defects such as bubbles and voids, thereby affecting the electrical performance of the coil components. The long gap will also weaken the structural strength of the stator housing 110, making it prone to deformation when subjected to external influences. If C is less than 1mm, it will reduce the limiting effect of the limiting structure 1102, and the stator plate 130 may be more prone to displacement during operation, affecting the overall performance of the coil components. In addition, too little injection molding material passes through the material gap 160 during injection molding, so that the injection molding material cooled at the material gap 160 cannot provide appropriate tensile force for the injection molding material at the opening 1101. Therefore, in this application, 1mm≤C≤0.25L is set in such a way that the length of the limiting structure 1102 is moderate, ensuring smooth flow of the injection molding material during the injection process, reducing accumulation and bubble formation, and also providing sufficient limiting force to maintain the precise position of the stator plate 130 within the stator housing 110, reducing performance degradation caused by mechanical displacement.

[0042] As shown in Figure 3, the bottom wall of the limiting structure 1102 extends axially along the stator housing 110, and the side wall of the limiting structure 1102 extends circumferentially along the stator housing 110. The connection between the bottom wall and the side wall of the limiting structure 1102 has a transition surface. The transition surface not only improves processing convenience but also reduces stress concentration at the connection between the bottom wall and the side wall of the limiting structure 1102, thereby increasing the structural strength and service life of the limiting structure 1102. Simultaneously, the transition surface provides a movement path for the limiting part. When the limiting part moves up and down in the axial direction, the transition surface acts as a guide, ensuring that the limiting part returns to its original assembly position along the transition surface, preventing jamming or displacement of the limiting part during movement.

[0043] As shown in Figures 6 and 7, the cross-sectional area of ​​the guide hole 132 in the radial direction of the stator housing 110 is S, which is 1.5 mm². 2 ≤S≤7mm 2 If S is less than 1.5mm 2 If the cross-sectional area of ​​the guide hole 132 is too small, it restricts the flow rate and volume of the injection molding compound, resulting in insufficient filling of the outside of the coil 140. This weakens the fixing effect of the injection molding compound on the coil 140 and increases the risk of displacement of the coil 140 during operation or vibration. If S is greater than 7mm... 2If the cross-sectional area of ​​the guide hole 132 is too large, it will reduce the structural strength and deformation resistance of the stator plate 130. Therefore, in this application, 1.5mm 2 ≤S≤7mm 2 This ensures sufficient and appropriate flow of the injection molding compound, allowing it to fully enclose the coil 140, while also maintaining the structural strength of the stator plate 130, preventing performance degradation and malfunctions of the coil components due to insufficient strength. In this application, S can be 1.5 mm. 2 3.5mm 2 5mm 2 or 7mm 2 .

[0044] As shown in Figures 1 and 2, the stator housing 110 includes an upper housing 111 and a lower housing 112 connected to each other. The upper housing 111 and the lower housing 112 are coaxially arranged. The upper housing 111 has a first notch on its side wall, and the lower housing 112 has a second notch on its side wall. The first notch and the second notch are corresponding and symmetrically arranged, and the first notch and the second notch cooperate to form a passage 1101. A third notch is provided at the circumferential end of the first notch along the first notch, and the first notch and the third notch are connected. A fourth notch is provided at the circumferential end of the second notch along the second notch, and the second notch and the fourth notch are connected. The third notch and the fourth notch are corresponding and symmetrically arranged, and the third notch and the fourth notch cooperate to form a limiting structure 1102. The above arrangement ensures the structural strength of the stator housing 110 while achieving precise positioning with the stator electrode plate 130, improving the durability of the stator housing 110 and the overall structural strength of the coil components.

[0045] The connection between the side of the first notch along the circumferential direction of the stator housing 110 and the side of the first notch along the axial direction of the stator housing 110 has a transition arc. The connection between the side of the second notch along the circumferential direction of the stator housing 110 and the side of the second notch along the axial direction of the stator housing 110 also has a transition arc.

[0046] As shown in Figure 7, the stator electrode plate 130 includes an upper electrode plate 133 and a lower electrode plate 134, which are coaxially arranged. The upper electrode plate 133 includes a first electrode plate and a plurality of first electrode teeth, which are spaced apart along the circumferential edge of the first electrode plate along the stator electrode plate 130. The lower electrode plate 134 includes a second electrode plate and a plurality of second electrode teeth, which are spaced apart along the circumferential edge of the second electrode plate along the stator electrode plate 130. The first electrode plate and the second electrode plate abut against each other and are mutually restrictive. The plurality of first electrode teeth and the plurality of second electrode teeth are located inside the frame 120. The upper electrode plate 133 has two first protrusions 1331 spaced apart, and the lower electrode plate 134 has two second protrusions 1341 spaced apart. The two first protrusions 1331 and the two second protrusions 1341 are arranged in a one-to-one correspondence. A first protrusion 1331 and a second protrusion 1341 cooperate to form a protrusion 131. The above configuration ensures the stability of the stator plate 130 during the injection molding process and improves the electrical and driving performance of the coil components.

[0047] Specifically, the edge of the upper electrode plate 133 is provided with at least one first opening along the circumference of the stator housing 110, and the edge of the lower electrode plate 134 is provided with at least one second opening along the circumference of the stator housing 110. Multiple first openings and multiple second openings are provided in a one-to-one correspondence. Among them, one first opening and one second opening cooperate to form a flow guide hole 132.

[0048] As shown in Figures 5 to 7, the skeleton 120 includes an upper skeleton 121 and a lower skeleton 122. The first pole tooth is located inside the upper skeleton 121, and the second pole tooth is located inside the lower skeleton 122. The coil 140 includes an upper coil 141 and a lower coil 142. The upper coil 141 is wound around the outside of the upper skeleton 121, and the lower coil 142 is wound around the outside of the lower skeleton 122.

[0049] As shown in Figure 6, at least one flow guide hole 132 is provided along the circumference of the stator housing 110 at the edge of the stator electrode plate 130. The flow guide hole 132 connects the space on both sides of the stator electrode plate 130 along the axial direction of the stator housing 110. Thus, during injection molding, the injection plastic can flow smoothly to the space on both sides of the stator electrode plate 130 through the flow guide hole 132, allowing the injection plastic to be evenly distributed and improving the filling effect. Especially in the area where the upper coil 141 and lower coil 142 are located, the injection plastic can tightly wrap around the upper coil 141 and lower coil 142, forming a continuous injection molding structure, which improves the fixing strength of the upper coil 141 and lower coil 142.

[0050] As shown in Figure 8, the coil component also includes an encapsulation layer 420, an upper waterproof shell 210, and a lower waterproof shell 220. The upper waterproof shell 210 is fitted around the outer periphery of the upper shell 111, and the lower waterproof shell 220 is fitted around the outer periphery of the lower shell 112. The encapsulation layer 420 is disposed between the upper waterproof shell 210 and the lower waterproof shell 220 along the circumferential direction of the stator shell 110, and the encapsulation layer 420 encapsulates the interface between the upper shell 111 and the lower shell 112.

[0051] Specifically, in this application, the interface divides the encapsulation layer 420 into two symmetrical parts; the part of the upper waterproof shell 210 that encapsulates the outer peripheral surface of the stator shell 110 is the upper peripheral surface, and the part of the lower waterproof shell 220 that encapsulates the outer peripheral surface of the stator shell 110 is the lower peripheral surface. The upper peripheral surface and the lower peripheral surface are symmetrically arranged relative to the interface.

[0052] During injection molding of the coil component, the upper and lower molds are closed. When the wire 500 connected to the bobbin 120 is placed in the upper mold: with the wire 500 facing upwards, the upper waterproof shell 210 is placed in the upper mold and the lower waterproof shell 220 is placed in the lower mold; with the wire 500 facing downwards, the upper waterproof shell 210 is placed in the lower mold and the lower waterproof shell 220 is placed in the upper mold. During injection molding, when the wire 500 is placed in the lower mold: with the wire 500 facing upwards, the upper waterproof shell 210 is placed in the lower mold and the lower waterproof shell 220 is placed in the upper mold; with the wire 500 facing downwards, the upper waterproof shell 210 is placed in the upper mold and the lower waterproof shell 220 is placed in the lower mold. Therefore, with the above configuration, compared to the asymmetrical structure of the upper waterproof shell 210 and the lower waterproof shell 220 relative to the interface, the structure of this application does not require mold replacement. That is, when the wire 500 is placed in the upper mold, regardless of whether the wire 500 faces upward or downward, a single mold can be used; when the wire 500 is placed in the lower mold, regardless of whether the wire 500 faces upward or downward, a single mold can be used, thus improving the versatility of the mold. The upper waterproof shell 210 has a protruding waterproof cover 212, and both the upper and lower molds have space to accommodate the waterproof cover 212.

[0053] In another embodiment of this application, an electric valve is provided, which includes the coil component provided in the above embodiments. The coil can effectively solve the problem that the positioning and mating method between the stator housing and the stator plate based on multiple notches requires opening more notches on the stator housing, which makes the processing technology of the stator plate and the stator housing more complicated and increases the processing difficulty. The electric valve with the above coil component also has the above advantages.

[0054] The above description is merely a preferred embodiment of this application and is 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: The stator housing (110) has a receiving cavity. A through port (1101) and a limiting structure (1102) are provided on the circumferential sidewall of the stator housing (110). The limiting structure (1102) is located at the end of the through port (1101) along the circumferential direction of the stator housing (110). The portion of the circumferential sidewall of the stator housing (110) outside the through port (1101) and the limiting structure (1102) is a sealed structure. A skeleton (120), part of which is disposed within the receiving cavity, and another part of which extends out of the receiving cavity from the passage (1101); The stator plate (130) is connected to the frame (120), and at least a portion of the stator plate (130) is located within the receiving cavity. The stator plate (130) has a limiting portion that is limited in conjunction with the limiting structure (1102).

2. The coil component according to claim 1, characterized in that, The limiting structure (1102) is a limiting groove, and there are two limiting structures (1102). The two limiting structures (1102) are respectively located at both ends of the passage (1101) along the circumference of the stator housing (110). The edge of the stator plate (130) is provided with two protrusions (131) at intervals along the circumference of the stator housing (110). The two protrusions (131) form two limiting parts, and each protrusion (131) is limited and engaged with the corresponding limiting structure (1102).

3. The coil component according to claim 1, characterized in that, In the axial direction of the stator housing (110), there is a material-accommodating gap (160) between the side wall of the limiting structure (1102) and the limiting part; in the axial direction of the stator housing (110), the size of the limiting structure (1102) is smaller than the size of the through port (1101).

4. The coil component according to claim 3, characterized in that, In the axial direction of the stator housing (110), the length of the material gap (160) is H, 0.3mm≤H≤2mm; In the circumferential direction of the stator housing (110), the length of the through-hole (1101) is L, and the length of the limiting structure (1102) is C, where 1mm≤C≤0.25L.

5. The coil component according to claim 1, characterized in that, The bottom wall of the limiting structure (1102) extends along the axial direction of the stator housing (110), and the side wall of the limiting structure (1102) extends along the circumferential direction of the stator housing (110). The connection between the bottom wall of the limiting structure (1102) and the side wall of the limiting structure (1102) has a transition surface.

6. The coil component according to claim 1, characterized in that, At least one flow guide hole (132) is provided on the edge of the stator electrode plate (130) along the circumference of the stator housing (110), and the flow guide hole (132) connects the space on both sides of the stator electrode plate (130) along the axial direction of the stator housing (110).

7. The coil component according to claim 6, characterized in that, In the radial direction of the stator housing (110), the cross-sectional area of ​​the guide hole (132) is S = 1.5 mm. 2 ≤S≤7mm 2 .

8. The coil component according to claim 1, characterized in that, The stator housing (110) includes an upper housing (111) and a lower housing (112) connected to each other. The upper housing (111) and the lower housing (112) are coaxially arranged. The upper housing (111) has a first notch on its side wall, and the lower housing (112) has a second notch on its side wall. The first notch and the second notch are correspondingly arranged, and the first notch and the second notch cooperate to form the passage (1101). A third notch is provided at the end of the first notch along the circumferential direction of the stator housing (110), and the first notch and the third notch are connected. A fourth notch is provided at the end of the second notch along the circumferential direction of the stator housing (110), and the second notch and the fourth notch are connected. The third notch and the fourth notch are correspondingly arranged, and the third notch and the fourth notch cooperate to form the limiting structure (1102).

9. The coil component according to claim 2, characterized in that, The stator electrode plate (130) includes an upper electrode plate (133) and a lower electrode plate (134). The upper electrode plate (133) and the lower electrode plate (134) are coaxially arranged. The upper electrode plate (133) includes a first electrode plate and a plurality of first electrode teeth. The lower electrode plate (134) includes a second electrode plate and a plurality of second electrode teeth. The first electrode plate and the second electrode plate abut against each other. The plurality of first electrode teeth and the plurality of second electrode teeth are respectively located inside the frame (120). The upper electrode plate (133) is provided with two first protrusions (1331) spaced apart, and the lower electrode plate (134) is provided with two second protrusions (1341) spaced apart. The two first protrusions (1331) and the two second protrusions (1341) are provided in a one-to-one correspondence. Among them, one first protrusion (1331) and one second protrusion (1341) cooperate to form one protrusion (131).

10. The coil component according to claim 8, characterized in that, The coil component further includes an encapsulation layer (420), an upper waterproof shell (210), and a lower waterproof shell (220). The upper waterproof shell (210) is fitted around the outer periphery of the upper shell (111), and the lower waterproof shell (220) is fitted around the outer periphery of the lower shell (112). The encapsulation layer (420) is disposed between the upper waterproof shell (210) and the lower waterproof shell (220) along the circumferential direction of the stator shell (110), and the encapsulation layer (420) encapsulates the interface between the upper shell (111) and the lower shell (112).

11. The coil component according to claim 10, characterized in that, The interface divides the encapsulation layer (420) into two symmetrical parts; the upper waterproof shell (210) encapsulates the outer peripheral surface of the stator shell (110) as the upper peripheral surface, and the lower waterproof shell (220) encapsulates the outer peripheral surface of the stator shell (110) as the lower peripheral surface. The upper peripheral surface and the lower peripheral surface are symmetrically arranged with respect to the interface.

12. An electric valve, characterized in that, The electric valve includes the coil component according to any one of claims 1 to 11.

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