Coil assembly and valve

Abstract

The coil assembly comprises a winding, a contact pin and a coil framework, the winding comprises a first winding section, an introduction section and a spiral section, the coil framework comprises a winding part, a first blocking part and a positioning part, the first blocking part is located on the radial outer side of the winding part, the positioning part is located on the radial outer side of the winding part, the contact pin is connected with the positioning part in a limiting mode, and the first winding section is wound on the contact pin. The spiral section is wound on the winding portion, the coil framework is provided with an avoiding groove, the leading-in section is located in the avoiding groove, the inner wall forming the avoiding groove comprises a first inner side wall, the leading-in section is located in the avoiding groove, the length direction of at least part of the leading-in section is consistent with the extending direction of the first inner side wall, and the avoiding groove in the shape improves stress concentration of the coil framework. And the reliability of the product is improved.

Description

Technical Field

[0001] The utility model relates to valve technology, in particular to a coil component and a valve. Background Art

[0002] The relevant coil assembly includes a coil frame, a winding and a pin. The pin is limited to connect the coil frame. The winding is wound with electromagnetic wire. The electromagnetic wire is wound from the pin and then wound on the coil frame to finally form a winding. The part of the winding wound from the pin to the coil frame can be called a lead segment, and the part of the winding wound on the coil frame can be called a spiral segment. The lead segment passes between the spiral segment and the coil frame. Affected by the lead segment, the coil frame near the lead segment is in a suspended state. When the coil assembly is subjected to force, the coil frame will produce stress concentration, and the coil frame near the lead segment tends to deform or even break. How to improve the problem of stress concentration of the lead segment and the coil frame is a technical issue. Utility Model Content

[0003] The utility model aims to provide a coil assembly and a valve thereof, which improve the stress concentration problem of the coil frame.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A coil assembly comprises a winding, a pin and a coil skeleton, wherein the winding comprises a first winding section, an introduction section and a spiral section, the coil skeleton comprises a winding portion, a first stop portion and a positioning portion, the first stop portion is located at the radially outer side of the winding portion, the positioning portion is located at the radially outer side of the winding portion, and along the radial direction of the winding portion, the positioning portion is away from the winding portion relative to the first stop portion; the pin is limitedly connected to the positioning portion, the first winding section is limitedly connected to the pin, the spiral section is wound around the winding portion, and the spiral section extends axially along the winding portion; the coil skeleton has a avoidance groove, at least part of the introduction section is located in the avoidance groove, the inner wall forming the avoidance groove comprises a first inner side wall, the first inner side wall extends from the positioning portion to the winding portion, at least part of the introduction section is located in the avoidance groove, and at least part of the introduction section has a length direction consistent with an extension direction of the first inner side wall.

[0006] In the coil assembly provided by the utility model, at least part of the lead-in section is located in the avoidance groove of the first stop portion, and the first stop portion avoids the position of the lead-in section. When the first stop portion is subjected to force, the deformation caused by the lead-in section is reduced, which is conducive to improving the stress concentration of the coil skeleton, thereby improving the reliability of the product; the first inner side wall forming the avoidance groove extends from the positioning portion to the winding portion, and the length direction of at least part of the lead-in section is consistent with the extension direction of the first inner side wall. The first inner side wall can support the lead-in section, which is conducive to the lead-in section being wound in the avoidance groove. A valve includes the above-mentioned coil assembly, and the valve also includes a plastic package, a valve core and a valve body, at least part of the coil assembly is located in the plastic package, at least part of the plastic package is located in the avoidance groove, the winding portion has a core hole, at least part of the valve core is located in the core hole, and at least one of the coil assembly and the plastic package is fixedly connected to the valve body.

[0007] A valve comprises the above-mentioned coil assembly, the valve also comprising a plastic overmolding body, a valve core and a valve body, at least part of the coil assembly is located in the plastic overmolding body, at least part of the plastic overmolding body is located in the avoidance groove, the winding portion has a core hole, at least part of the valve core is located in the core hole, and at least one of the coil assembly and the plastic overmolding body is fixedly connected to the valve body.

[0008] In the valve provided by the utility model, at least part of the introduction section is located in the avoidance groove of the first stop part, and the first stop part avoids the position of the introduction section. When the first stop part is subjected to force, the deformation caused by the introduction section is reduced, which is beneficial to improving the stress concentration of the coil skeleton and further improving the reliability of the product; the first inner side wall forming the avoidance groove extends from the positioning part to the winding part, and the length direction of at least part of the introduction section is consistent with the extension direction of the first inner side wall. The first inner side wall can support the introduction section, which is beneficial to the introduction section being wound in the avoidance groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is one of the three-dimensional structural schematic diagrams of a coil assembly of this embodiment;

[0010] Figure 2 This is the second schematic diagram of the three-dimensional structure of a coil assembly of this embodiment;

[0011] Figure 3 This is a third schematic diagram of a three-dimensional structure of a coil assembly of this embodiment;

[0012] Figure 4 This is one of the three-dimensional structural schematic diagrams of the coil skeleton of this embodiment;

[0013] Figure 5 Schematic diagram of the cross-sectional structure of the coil skeleton of this embodiment;

[0014] Figure 6 This is the second schematic diagram of the three-dimensional structure of the coil skeleton of this embodiment;

[0015] Figure 7 is a schematic diagram of the three-dimensional structure of the winding of this embodiment;

[0016] Figure 8 is a schematic diagram of the three-dimensional structure of the pin of this embodiment;

[0017] Fig. 9 is a schematic diagram of the three-dimensional structure of a valve of this embodiment;

[0018] Fig.10 is a schematic cross-sectional structure diagram of a valve of this embodiment;

[0019] In the figure: 100-coil assembly, 1-winding, 2-pin, 3-coil skeleton, 4-plastic package, 5-control circuit board, 6-machine cover, 7-valve body, 8-valve core, 11-first winding section, 12-introduction section, 13-spiral section, 14-lead-out section, 15-second winding section, 21-first needle section, 22-second needle section, 31-winding part, 32-first stopper, 33-second stopper, 34-positioning part, 35-avoidance groove, 311-first peripheral wall, 31 2-second peripheral wall, 313-core hole, 321-first retaining wall, 322-extension portion, 323-extension wall, 331-second retaining wall, 341-winding groove, 342-chamfered surface, 343-positioning wall, 344-first positioning surface, 345-positioning hole, 346-positioning groove, 347-first elastic inner wall, 348-second elastic inner wall, 351-first inner side wall, 352-second inner side wall, 353-first bottom wall, 41-receiving groove, 71-valve channel. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0021] It should be noted that the coil assembly 100 of the present embodiment is mainly used in valves. In the existing valves, the coil assembly includes a coil skeleton, a winding and a pin, the winding includes a spiral section and an introduction section, the spiral section is wound around the coil skeleton, and one end of the introduction section extends outward from between the spiral section and the coil skeleton, so that the introduction section can electrically contact an external power supply or an external electrical connector. Considering that the working environment of the valve is prone to the problem of the coil assembly being eroded by water vapor and media, in order to avoid the above problems, the coil assembly will be injection molded to form a plastic body that covers the coil assembly, and the plastic body plays a role of sealing and protecting the coil assembly, thereby avoiding the problem of water vapor and media erosion. However, in the process of injection molding to form the plastic body, the plastic in the molten state generates injection pressure on the introduction section, and the introduction section is also subjected to the pressing force of the spiral section. Under the joint action of the injection pressure and the pressing force, the stress concentration degree generated by the introduction section on the coil skeleton is further deepened, which is likely to cause the problem of deformation or even rupture of the coil skeleton.

[0022] Based on the above technical issues, such as Figure 1 As shown, a coil assembly 100 provided in this embodiment is illustrated, including a winding 1, a pin 2 and a coil frame 3.

[0023] The winding 1 is used to generate a magnetic field when powered. The winding 1 is formed by winding an electromagnetic wire on a coil frame 3. The electromagnetic wire includes but is not limited to at least one of an enameled wire, a wrapped wire, an enameled wrapped wire and an inorganic insulated wire. Figure 7 As shown, according to the order in which the electromagnetic wire is wound on the coil frame 3, the winding 1 includes a first winding section 11, an introduction section 12, a spiral section 13, an extraction section 14 and a second winding section 15, and the first winding section 11, the introduction section 12, the spiral section 13, the extraction section 14 and the second winding section 15 are sequentially connected together along the length direction of the electromagnetic wire. The number of windings 1 is at least one. In some embodiments, the number of windings 1 is two, and the two windings 1 can be formed by winding two electromagnetic wires on the coil frame 3 separately, or by winding two electromagnetic wires together on the coil frame 3 in a double-wire parallel winding method. In this embodiment, the number of windings 1 is one.

[0024] like Figure 2 and Figure 3As shown, the winding 1 is made by a close winding method. When the winding 1 is wound on the coil frame 3, the winding principle from the beginning to the end and from the inside to the outside is followed, and the first winding section 11, the lead-in section 12, the spiral section 13, the lead-out section 14 and the second winding section 15 are wound in sequence. The first winding section 11, the lead-in section 12, the spiral section 13, the lead-out section 14 and the second winding section 15 are all in a tight state, so that the winding 1 and the coil frame 3 are closely matched together. The electromagnetic wires constituting the spiral section 13 are closely arranged one circle next to another, one end of the spiral section 13 is located on the inner side of the spiral section 13, and the other end of the spiral section 13 is located on the outer side of the spiral section 13. The spiral section 13 in a tight state will exert a certain degree of compression force on the coil frame 3 and the lead-in section 12, and the compression force ensures the connection stability of the spiral section 13, the lead-in section 12 and the coil frame 3 to a certain extent. One end of the lead-in section 12 is connected to one end of the spiral section 13 located on the inner side, and the other end of the lead-in section 12 is located on the outer side of the spiral section 13 and connected to the first winding section 11. The first winding section 11 is located on the radial outer side of the spiral section 13. At least part of the first winding section 11 is fixedly connected to the pin 2, so that at least part of the first winding section 11 is in electrical contact with the pin 2. At least part of the lead-in section 12 is located on the end surface of the spiral section 13, so that the spiral section 13 can press the lead-in section 12. One end of the lead-out section 14 is connected to one end of the spiral section 13 located on the outer side wall, and the other end of the lead-out section 14 is located on the outer side of the spiral section 13 and connected to the second winding section 15. The second winding section 15 is also located on the outer side of the spiral section 13. At least part of the second winding section 15 is fixedly connected to the pin 2, so that at least part of the second winding section 15 is in electrical contact with the pin 2. The lead-in section 12 and the lead-out section 14 can be fixedly connected to the same pin 2, or they can be fixedly connected to different pins 2. In this embodiment, the lead-in section 12 is fixedly connected to one pin 2, and the lead-out section 14 is fixedly connected to another pin 2. The fixed connection structure of the first winding section 11 and the pin 2 specifically includes: the first winding section 11 is spirally wound around the pin 2, and the first winding section 11 and the pin 2 are then connected together by soldering, thereby improving the electrical contact performance of the first winding section 11 and the pin 2. The fixed connection structure of the second winding section 15 and the pin 2 is basically the same as the fixed connection structure of the first winding section 11 and the pin 2, and will not be repeated here.

[0025] The pin 2 is fixedly connected to the coil frame 3 and is located radially outside the spiral section 13. The lead-in section 12 and the lead-out section 14 are electrically contacted with the pin 2. The winding 1 establishes power transmission with at least one of an external power supply and an external electrical connector through the pin 2. Figure 8As shown, the plug pin 2 includes a first needle segment 21 and a second needle segment 22, which are of an integral structure. The overall structure of the first needle segment 21 and the second needle segment 22 is in an "L" shape. The first needle segment 21 and the second needle segment 22 can be formed by a metal wire bending process. The lead-in segment 12 and the lead-out segment 14 electrically contact the first needle segment 21, and the second needle segment 22 is used to electrically contact at least one of an external power supply and an external electrical connector. The number of plug pins 2 is at least two. In this embodiment, there are two plug pins 2, the lead-in segment 12 electrically contacts the first needle segment 21 of one plug pin 2, and the lead-out segment 14 electrically contacts the first needle segment 21 of another plug pin 2.

[0026] like Figures 4 to 6 As shown, the coil skeleton 3 includes a winding portion 31, and the first winding segment is wound around the winding portion. The outer wall of the winding portion 31 includes a first peripheral wall 311, and the spiral segment 13 is wound around the first peripheral wall 311. When the winding 1 is energized, a magnetic field can be generated at the center of the first peripheral wall 311. The shape of the first peripheral wall 311 includes but is not limited to at least one of a cylindrical, prism, conical, and pyramidal shape. In this embodiment, the shape of the first peripheral wall 311 includes a cylindrical shape, which has the advantages of good processing performance and easy winding.

[0027] The winding portion 31 also has a core hole 313, which penetrates the winding portion 31. Fig.10 As shown, the core hole 313 is used to install the valve core 8, and the center of the first peripheral wall 311 is located in the core hole 313, so that the magnetic field generated by the winding 1 drives the valve core 8 in the core hole 313. The inner wall forming the core hole 313 includes a second peripheral wall 312, and the second peripheral wall 312 is located in the first peripheral wall 311, and the center of the first peripheral wall 311 and the center of the second peripheral wall 312 coincide with each other. The shape of the second peripheral wall 312 includes but is not limited to at least one of a cylindrical, a prismatic, a conical and a pyramidal shape. In this embodiment, the shape of the second peripheral wall 312 is cylindrical, so that the valve core 8 is easily aligned with the first peripheral wall 311 in the second peripheral wall 312, and then the valve core 8 installed in the core hole 313 and the spiral section 13 installed on the first peripheral wall 311 are easily aligned, thereby ensuring the coaxiality of the valve core 8 and the spiral section 13.

[0028] The winding portion 31 is a cylindrical thin-walled structure, the first circumferential wall 311 is formed on the outer wall of the winding portion 31, and the second circumferential wall 312 is formed on the inner wall of the winding portion 31, so that the winding portion 31 having a core hole 313, a first circumferential wall 311 and a second circumferential wall 312 can be formed by a plastic molding method.

[0029] The coil skeleton 3 further comprises a first stopper 32, the end surface of the first stopper 32 comprises a first stopper wall 321, the avoidance groove 35 is formed on the first stopper wall 321, the first stopper wall 321 radially extends relative to the first peripheral wall 311 of the winding portion 31, at least part of the spiral segment 13 contacts the first stopper wall 321, and the first stopper wall 321 blocks the axial movement of the spiral segment 13 on the first peripheral wall 311, thereby limiting the axial position of the spiral segment 13 relative to the first peripheral wall 311. The overall structure of the first stopper 32 is a roughly annular thin plate structure, the first stopper wall 321 is roughly arc-shaped, the first stopper 32 surrounds the winding portion 31, the first stopper wall 321 surrounds the first peripheral wall 311, and the first stopper 32 is fixedly connected to the winding portion 31. Specifically, the first stopper 32 and the winding portion 31 are an integral structure, so that the first stopper 32 and the winding portion 31 are formed by a plastic molding method. In some embodiments, the shape of the first circumferential wall 311 includes a cone, and the end of the first circumferential wall 311 with a smaller aperture is located on the first retaining wall 321 so that the spiral segment 13 can maintain contact with the first retaining wall 321 .

[0030] The coil skeleton 3 further includes a second stopper 33, the end surface of which includes a second stopper wall 331, which extends radially relative to the first peripheral wall 311, and the first stopper 32 and the second stopper 33 are parallel to each other. The function of the second stopper wall 331 is substantially the same as that of the first stopper wall 321, one end surface of the spiral segment 13 is located at the first stopper wall 321, and the other end surface of the spiral segment 13 is located at the second stopper wall 331, so that the first stopper wall 321 and the second stopper wall 331 define the axial position of the spiral segment 13 on the first peripheral wall 311 in all directions. The overall structure of the second stopper 33 is also an annular thin plate structure, the second stopper wall 331 is an annular surface, the second stopper wall 331 is located at the end surface of the second stopper 33, and the second stopper wall 331 surrounds the first peripheral wall 311, and the first stopper 32, the second stopper 33 and the winding portion 31 are an integrated structure, so that the first stopper 32, the second stopper 33 and the winding portion 31 can be formed by a plastic molding method.

[0031] like Figure 2 As shown, the first stop portion 32 also includes an extension portion 322, which is a portion of the first stop portion 32 that extends radially relative to the spiral segment 13. The extension portion 322 extends radially outward of the spiral segment 13, and the outer side wall of the extension portion 322 includes an extension wall 323. The extension wall 323 is the outer side wall of the first stop portion 32 that is farthest from the center of the first circumferential wall 311.

[0032] like Figure 3As shown, the coil skeleton 3 also includes a positioning portion 34, the pin 2 is fixedly connected to the positioning portion 34, the first winding section 11 is wound around the positioning portion 34, and the second winding section 15 is wound around the positioning portion 34. The positioning portion 34 is used to position the pin 2, the first winding section 11 and the second winding section 15. The number of the pins 2 is consistent with the number of the positioning portions 34, and the pins 2 correspond to the positioning portions 34 one by one. The first winding section 11 and the second winding section 15 can be connected to the same positioning portion 34, or they can be connected to different positioning portions 34 respectively. In this embodiment, the number of the positioning portions 34 is at least two, the first winding section 11 and the pin 2 are connected to one positioning portion 34, and the second winding section 15 and another pin 2 are connected to another positioning portion 34. More than two positioning portions 34 are fixedly connected to the extension wall 323 side by side and spaced apart from each other, and adjacent positioning portions 34 are arranged at intervals, leaving gaps. The design of the gaps facilitates the first winding section 11 and the second winding section 15 to wrap around the positioning portions 34, and also increases the electrical clearance between adjacent pins 2, thereby improving the stability and safety of electrical performance.

[0033] The positioning portion 34 is located on the outer side wall of the first stopper 32, specifically on the extension wall 323. The positioning portion 34 protrudes outward from the extension wall 323 and is located radially outside the spiral section 13. The pin 2 located on the positioning portion 34 can be away from the spiral section 13, which facilitates the subsequent electrical contact between the pin 2 and the external power supply or external electrical connector, increases the distance of electrical transmission, and ensures a safe electrical gap. The positioning portion 34 is fixedly connected to the first stopper 32. Specifically, the positioning portion 34 and the first stopper 32 are an integrally formed structure, so that the winding portion 31, the positioning portion 34, the first stopper 32 and the second stopper 33 can be formed by a plastic molding method.

[0034] The first winding section 11 is wound around the positioning portion 34 to improve the connection stability of the first winding section 11 on the positioning portion 34. Specifically, the positioning portion 34 has a winding groove 341, which penetrates the positioning portion 34, and the first winding section 11 is arranged in the winding groove 341. At least part of the first winding section 11 is located in the winding groove 341. The winding groove 341 is used to locate the winding position of the first winding section 11 at the positioning portion 34, further improving the connection stability between the first winding section 11 and the positioning portion 34. The winding groove 341 is formed on the outer side wall of the positioning portion 34. The cross section of the winding groove 341 is arc-shaped and is not closed. The winding groove 341 is exposed on the outer side wall of the positioning portion 34, so that the first winding section 11 can directly enter the winding groove 341. The winding groove 341 is also located at the extension wall 323 , and is connected to the avoidance groove 35 . The first inner wall 351 extends to form the inner wall of the winding groove 341 , so that the electromagnetic wire can be wound in the winding groove 341 and the avoidance groove 35 in sequence.

[0035] The positioning portion 34 also includes a chamfered surface 342, and at least part of the first winding section 11 is located on the chamfered surface 342. The chamfered surface 342 is used to prevent the first winding section 11 from generating stress concentration on the positioning portion 34 and causing the problem of wire breakage. The angle between the axial direction of the winding groove 341 and the chamfered surface 342 is an acute angle, and one end of the winding groove 341 is located on the chamfered surface 342, so that the electromagnetic wire can smoothly transition between the winding groove 341 and the chamfered surface 342. In this embodiment, the angle between the axial direction of the winding groove 341 and the chamfered surface 342 is preferably 45°.

[0036] The positioning portion 34 also includes a first positioning surface 344, which is located on one side of the chamfered surface 342, at least part of the thread head is located on the first positioning surface 344, the first positioning surface 344 and the chamfered surface 342 are inclined, and the angle between the first positioning surface 344 and the chamfered surface 342 is an obtuse angle, so that the first winding section 11 is smoothly wound around the first positioning surface 344 and the chamfered surface 342. At least part of the first needle section 21 protrudes from the first positioning surface 344, at least part of the first winding section 11 is spirally wound on the first needle section 21 protruding from the first positioning surface 344, and connected together by soldering. In this embodiment, the angle between the first positioning surface 344 and the chamfered surface 342 is preferably 135°.

[0037] The positioning portion 34 also has a positioning hole 345, one end of which is located on the first positioning surface 344, and the first needle segment 21 is inserted into the positioning hole 345. The positioning hole 345 improves the connection stability between the insertion pin 2 and the positioning portion 34. The positioning portion 34 includes a positioning wall 343, which is a thin-walled structure. The first positioning surface 344 is located on the outer surface of the positioning wall 343 and is easily pierced by the insertion pin 2. During the assembly of the first needle segment 21 and the positioning hole 345, the first needle segment 21 can pierce the positioning wall 343 to obtain the positioning hole 345, and the positioning hole 345 penetrates the positioning wall 343, so that the first needle segment 21 and the positioning hole 345 are matched in an interference fit to improve the connection stability between the first needle segment 21 and the positioning hole 345. The end of the first needle segment 21 can be sharp to facilitate piercing the positioning wall 343.

[0038] The positioning portion 34 also has a positioning groove 346, which is connected to the positioning hole 345. At least part of the second needle segment 22 is located in the positioning groove 346, thereby improving the connection stability between the insertion pin 2 and the positioning portion 34. The inner wall forming the positioning groove 346 includes a first elastic inner wall 347 and a second elastic inner wall 348. The first elastic inner wall 347 is located on one side of the first needle segment 21, and the second elastic inner wall 348 is located on the other side of the first needle segment 21. The first elastic inner wall 347 is also located on one side of the second needle segment 22, and the second elastic inner wall 348 is also located on the other side of the second needle segment 22. The overall structure of the first elastic inner wall 347 is a thin-walled structure, and the first elastic inner wall 347 allows a certain degree of elastic deformation. The overall structure of the second elastic inner wall 348 is a thin-walled structure, and the second elastic inner wall 348 allows a certain degree of elastic deformation. If the first elastic inner wall 347 and the second elastic inner wall 348 are elastically deformed, the groove width of the positioning groove 346 changes to adapt to pins 2 of different sizes, and also improves the connection stability of the pin 2 on the positioning portion 34.

[0039] The second winding segment 15 is fixedly connected to the positioning portion 34 so that the second winding segment 15 is electrically in contact with the first needle segment 21. The specific connection structure between the second winding segment 15 and the positioning portion 34 is substantially the same as the specific connection structure between the first winding segment 11 and the positioning portion 34, which will not be repeated here.

[0040] The first stopper 32 also has an avoidance groove 35, in which at least part of the lead-in section 12 is located, and the avoidance groove 35 serves as an avoidance for the lead-in section 12, which reduces the pressing force of the spiral section 13 on the lead-in section 12 to a certain extent, and avoids the problem of stress concentration on the first stopper 32 caused by the excessive pressing force of the spiral section 13 on the lead-in section 12. The first stopper wall 321 is an arc-shaped plane, and the avoidance groove 35 on the first stopper wall 321 is equivalent to being sunken, so that the electromagnetic wire can be smoothly wound on the positioning portion 34, the extension portion 322 and the avoidance groove 35 in sequence.

[0041] The inner wall forming the avoidance groove 35 includes a first inner side wall 351, which is located between the positioning portion 34 and the winding portion 31, one side of the first inner side wall 351 extends to the winding groove 341 of the positioning portion 34, and the other side of the first inner side wall 351 extends to the first peripheral wall 311 of the winding portion 31, and at least part of the lead-in section 12 contacts the first inner side wall 351. In the process of forming the overmolded body 4 by injection molding, since at least part of the lead-in section 12 contacts the first inner side wall 351, the first inner side wall 351 plays a role of lateral support for the lead-in section 12, thereby avoiding the problem of wire breakage of the lead-in section 12 under the action of the injection molding pressure. The first inner side wall 351 extends to the first peripheral wall 311 of the winding portion 31, and the first inner side wall 351 also extends to the positioning portion 34. The first inner side wall 351 extends from the positioning portion 34 to the first peripheral wall 311, and at least part of the lead-in section contacts the first inner side wall, ensuring that the electromagnetic wire can be smoothly wound on the positioning portion 34, the first inner side wall 351 and the first peripheral wall 311 in sequence, and the first inner side wall 351 can also fully support the lead-in section 12 laterally, thereby improving the lateral support effect of the first inner side wall 351 on the lead-in section 12. Specifically, the positioning groove 346 is connected to the avoidance groove 35, and the first inner side wall 351 extends to the inner wall forming the positioning groove 346, and the inner wall of the positioning groove 346 extends to the chamfered surface 342. The first inner side wall 351 is a plane, and the extension direction of the first inner side wall 351 from the positioning portion 34 to the first peripheral wall 311 is consistent with the linear length direction of the lead-in section 12, and the lead-in section 12 can fully contact the first inner side wall 351. The extension direction of the first inner side wall 351 is also consistent with the tangent direction of the first peripheral wall 311, and the lead-in section 12 is in a taut state, and the taut lead-in section 12 can fully contact the first inner side wall 351, and it is also convenient for the lead-in section 12 to be smoothly wound around the first inner side wall 351 and the first peripheral wall 311 to avoid being suspended.

[0042] The first inner side wall 351 and the first retaining wall 321 are inclined, and the angle between the first inner side wall 351 and the first retaining wall 321 is an obtuse angle, that is, the angle between the end face of the spiral segment 13 and the first inner side wall 351 is an acute angle, the first bottom wall 353 and at least one of the spiral segments 13 contact the lead-in segment, and the lead-in segment 12 can be supported by the coil skeleton 3 and the spiral segment 13. Moreover, considering that the wire diameter of the lead-in segment 12 may change, the inclined setting structure of the end face of the spiral segment 13 and the first inner side wall 351 allows the lead-in segments 12 of different wire diameters to fully contact the coil skeleton 3 and the spiral segment 13. In this embodiment, the angle between the first inner side wall 351 and the first retaining wall 321 is preferably 135°.

[0043] The inner wall forming the avoidance groove 35 also includes a second inner wall 352. The first inner wall 351 and the second inner wall 352 are sequentially located in the extension direction of the introduction section 12. The introduction section 12 enters the avoidance groove 35 from the first inner wall 351 and leaves the avoidance groove 35 from the second inner wall 352, so that the introduction section 12 is wound around the avoidance groove 35. At least part of the introduction section 12 contacts the second inner wall 352. The second inner wall 352 is an inclined plane. The second inner wall 352 and the first retaining wall 321 are inclinedly arranged. The angle between the second inner wall 352 and the first retaining wall 321 is also an obtuse angle, which ensures that the electromagnetic wire can smoothly transition from the second inner wall 352 to the first retaining wall 321, thereby avoiding the problem of the electromagnetic wire being broken due to stress concentration between the second inner wall 352 and the first retaining wall 321. The second inner side wall 352 extends to the first peripheral wall 311 of the winding portion 31, and the second inner side wall 352 also extends to the outer side wall of the first stop portion 32. The second inner side wall 352 extends from the outer side wall of the first stop portion 32 to the first peripheral wall 311. In the process of winding the winding 1 with electromagnetic wire, the electromagnetic wire can be guided by the second inner side wall 352, starting from the outer side wall of the first stop portion 32, and winding to the first peripheral wall 311 of the winding portion 31, thereby improving the winding efficiency of the winding 1. Moreover, in the process of forming the overmolded body 4 by injection molding, the plastic in the molten state can enter the avoidance groove 35 under the guidance of the second inner side wall 352, so as to facilitate injection molding in the avoidance groove 35. In some embodiments, the extension direction of the second inner side wall 352 from the outer side wall of the first stop portion 32 to the first peripheral wall 311 is substantially consistent with the radial direction of the first peripheral wall 311, further improving the guiding efficiency of the second inner side wall 352 for the electromagnetic wire. In this embodiment, the included angle between the second inner wall 352 and the first blocking wall 321 is preferably 135°.

[0044] The inner wall forming the avoidance groove 35 also includes a first bottom wall 353, and the first bottom wall 353 is located on one side of the first inner wall 351. The first bottom wall 353 is also located on one side of the second inner wall 352. The first bottom wall 353 is located between the first inner wall 351 and the second inner wall 352. The first bottom wall 353 is also a plane. The first bottom wall 353 and the first retaining wall 321 are basically parallel, that is, the first bottom wall 353 is equivalent to the sunken surface on the first retaining wall 321. The first bottom wall 353 is located radially outside the first peripheral wall 311, and the first bottom wall 353 extends to the first peripheral wall 311. The first bottom wall 353 extends to the outer wall of the first stopper 32. During the process of injection molding to form the overmolded body 4, the plastic in the molten state can flow into the avoidance groove 35 under the guidance of the first bottom wall 353, the first inner side wall 351 and the second inner side wall 352. The plastic can fully fill the avoidance groove 35, thereby further improving the connection stability of the lead-in section 12 in the avoidance groove 35. The first bottom wall 353 and the spiral section 13 are arranged with a gap, and at least part of the lead-in section 12 is located in the gap between the first bottom wall 353 and the spiral section 13. The lead-in section 12 is limited by the first bottom wall 353 and the spiral section 13, thereby improving the connection stability between the lead-in section 12 and the coil skeleton 3.

[0045] The first inner side wall 351 and the first bottom wall 353 are also inclined, and the inclination angle of the first inner side wall 351 relative to the first bottom wall 353 is an obtuse angle, which ensures that the electromagnetic wire can smoothly transition from the first inner side wall 351 to the first bottom wall 353, and the inclination angle of the first inner side wall 351 relative to the first bottom wall 353 is preferably 135°. The second inner side wall 352 and the first bottom wall 353 are also inclined, and the inclination angle of the second inner side wall 352 relative to the first bottom wall 353 is an obtuse angle, which ensures that the electromagnetic wire can smoothly transition from the first bottom wall 353 to the second inner side wall 352, and the inclination angle of the second inner side wall 352 relative to the first bottom wall 353 is preferably 135°.

[0046] This embodiment also provides a valve. It should be noted that the valve is an actuator using electromagnetic control technology, and its application scenarios include but are not limited to automobile air conditioning systems and thermal management devices. In automobile air conditioning systems and thermal management devices, the valve is installed between the condenser and the evaporator, located at the boundary node between high pressure and low pressure in the system. At the boundary node, the valve can throttle and reduce the high-pressure refrigerant from the condenser to adjust and control the dosage of the refrigerant entering the evaporator.

[0047] like Fig. 9 As shown, a valve provided in this embodiment is illustrated, including the above-mentioned coil assembly 100, and also includes a plastic package 4, a control circuit board 5, a valve core 8, a machine cover 6 and a valve body 7.

[0048] like Fig.10As shown, at least part of the coil assembly 100 is located in the overmolded body 4, and at least part of the overmolded body 4 is located in the avoidance groove 35, and the overmolded body 4 plays a role of sealing and protecting the coil assembly 100. The overmolded body 4 is formed on the coil assembly 100 by a plastic injection molding process, so that the overmolded body 4 can be coated on the coil assembly 100 and fill the avoidance groove 35, and the overmolded body 4 and the coil assembly 100 form an integral structure, so as to facilitate subsequent assembly with the valve body.

[0049] The second needle segment 22 is located outside the plastic package 4, and the second needle segment 22 electrically contacts the control circuit board 5. Specifically, the second needle segment 22 can be plugged into the control circuit board 5 and electrically connected together by soldering. The control circuit board 5 can automatically control the power on and off of the winding 1 according to a preset program.

[0050] The plastic package 4 includes a placement groove 41, and the control circuit board 5 is located in the placement groove 41. The machine cover 6 is covered in the placement groove 41 and fixedly connected to the plastic package 4. The valve body 7 is fixedly connected to the plastic package 4, and the valve body 7 includes a valve channel 71, and the valve channel 71 is connected to the core hole 313. At least part of the valve core 8 is located in the valve hole 313, and at least part of the valve core 8 is located in the valve channel 71. The coil assembly 100 can drive the valve core 8 to move relative to the valve body 7. If the valve core 8 moves relative to the valve body 7, the valve channel 71 can be opened or closed.

[0051] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A coil assembly, comprising a winding (1), a pin (2) and a coil frame (3), characterized in that: The winding (1) comprises a first winding section (11), an introduction section (12) and a spiral section (13); the coil skeleton (3) comprises a winding portion (31), a first stop portion (32) and a positioning portion (34); the first stop portion (32) is located radially outside the winding portion (31); the positioning portion (34) is located radially outside the winding portion (31); along the radial direction of the winding portion (31), the positioning portion (34) is away from the winding portion (31) relative to the first stop portion (32); the insertion pin (2) is limit-connected to the positioning portion (34); the first winding section (11) is limit-connected to the winding portion (31); The plug pin (2) is connected, the spiral section (13) is wound around the winding section (31), and the spiral section (13) extends along the axial direction of the winding section (31); the first stop section (32) has a avoidance groove (35), at least part of the introduction section (12) is located in the avoidance groove (35), and the inner wall forming the avoidance groove (35) includes a first inner side wall (351), and the first inner side wall (351) extends from the positioning section (34) to the winding section (31), and the length direction of at least part of the introduction section (12) is consistent with the extension direction of the first inner side wall (351).

2. The coil assembly according to claim 1, characterized in that: The inner wall forming the avoidance groove (35) comprises a first bottom wall (353), a gap is provided between the first bottom wall (353) and the spiral section (13), and at least a part of the introduction section (12) is located in the gap between the first bottom wall (353) and the spiral section (13).

3. The coil assembly according to claim 2, characterized in that: The first stop portion (32) comprises a first stop wall (321), the avoidance groove (35) is formed on the first stop wall (321), and at least part of the spiral section (13) contacts the first stop wall (321).

4. The coil assembly according to claim 3, characterized in that: The first inner side wall (351) and the first blocking wall (321) are arranged obliquely, and the inclination angle of the first inner side wall (351) relative to the first blocking wall (321) is an obtuse angle. The first inner side wall (351) and the first bottom wall (353) are arranged obliquely, and the inclination angle of the first inner side wall (351) relative to the first bottom wall (353) is an obtuse angle. At least one of the first bottom wall (353) and the spiral section (13) contacts the introduction section (12).

5. The coil assembly according to claim 3, characterized in that: The inner wall forming the avoidance groove (35) comprises a second inner side wall (352); the first inner side wall (351) and the second inner side wall (352) are sequentially located in the extension direction of the introduction section (12); at least a portion of the introduction section (12) contacts the second inner side wall (352); the second inner side wall (352) and the first retaining wall (321) are inclined; the inclination angle of the second inner side wall (352) relative to the first retaining wall (321) is an obtuse angle; the second inner side wall (352) and the first bottom wall (353) are inclined; the inclination angle of the second inner side wall (352) relative to the first bottom wall (353) is an obtuse angle.

6. The coil assembly according to claim 4, characterized in that: The inner wall forming the avoidance groove (35) comprises a second inner side wall (352); the first inner side wall (351) and the second inner side wall (352) are sequentially located in the extension direction of the introduction section (12); at least a portion of the introduction section (12) contacts the second inner side wall (352); the second inner side wall (352) and the first retaining wall (321) are inclined; the inclination angle of the second inner side wall (352) relative to the first retaining wall (321) is an obtuse angle; the second inner side wall (352) and the first bottom wall (353) are inclined; the inclination angle of the second inner side wall (352) relative to the first bottom wall (353) is an obtuse angle.

7. The coil assembly according to claim 5, characterized in that: The second inner side wall (352) extends from the winding portion (31) to the outer side wall of the first blocking portion (32), and along the circumference of the winding portion (31), the second inner side wall (352) is inclined relative to the first inner side wall (351); the cross section of the avoidance groove (35) is fan-shaped, the cross section of the avoidance groove (35) is perpendicular to the axial direction of the winding portion (31), and the cross section of the avoidance groove (35) is parallel to the radial direction of the winding portion (31).

8. The coil assembly according to any one of claims 2 to 7, characterized in that: The first bottom wall (353) extends from the winding portion (31) toward the outer side wall of the first stop portion (32), and at least a portion of the introduction section (12) is in contact with the first inner side wall (351).

9. The coil assembly according to any one of claims 1 to 7, characterized in that: The positioning portion (34) has a winding groove (341), at least part of the first winding section (11) is located in the winding groove (341), the winding groove (341) is connected to the avoidance groove (35), and the first inner side wall (351) extends to form an inner wall of the winding groove (341).

10. The coil assembly according to claim 8, characterized in that The positioning portion (34) has a winding groove (341), at least part of the first winding section (11) is located in the winding groove (341), the winding groove (341) is connected to the avoidance groove (35), and the first inner side wall (351) extends to form an inner wall of the winding groove (341).

11. The coil assembly according to any one of claims 1 to 7 and 10, characterized in that: The winding portion (31) comprises a first circumferential wall (311), the spiral segment (13) is wound around the first circumferential wall (311), the first inner side wall (351) extends to the first circumferential wall (311), and the extension direction of the first inner side wall (351) toward the first circumferential wall (311) is consistent with the tangent direction of the first circumferential wall (311).

12. The coil assembly according to claim 8, characterized in that The winding portion (31) comprises a first circumferential wall (311), the spiral segment (13) is wound around the first circumferential wall (311), the first inner side wall (351) extends to the first circumferential wall (311), and the extension direction of the first inner side wall (351) toward the first circumferential wall (311) is consistent with the tangent direction of the first circumferential wall (311).

13. The coil assembly according to claim 9, characterized in that: The winding portion (31) comprises a first circumferential wall (311), the spiral segment (13) is wound around the first circumferential wall (311), the first inner side wall (351) extends to the first circumferential wall (311), and the extension direction of the first inner side wall (351) toward the first circumferential wall (311) is consistent with the tangent direction of the first circumferential wall (311).

14. A valve, characterized in that: The valve comprises a coil assembly (100) as claimed in any one of claims 1 to 13, wherein the valve further comprises a plastic overmolding body (4), a valve core (8) and a valve body (7), wherein at least part of the coil assembly (100) is located in the plastic overmolding body (4), and at least part of the plastic overmolding body (4) is located in the avoidance groove (35), the winding portion (31) has a core hole (313), and at least part of the valve core (8) is located in the core hole (313), and at least one of the coil assembly (100) and the plastic overmolding body (4) is fixedly connected to the valve body (7).

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