Inductor, circuit device and heating and ventilation system
By using a smoothly connected cylindrical magnetic core structure and optimized coil windings, the problems of high cost and large footprint of PFC inductors are solved, achieving low cost and efficient space utilization of inductors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-04-03
AI Technical Summary
In the existing technology, PFC inductors are expensive and occupy a large area, resulting in wasted space on the circuit board.
The structure employs a smoothly connected cylindrical magnetic core, with the core dimension in the first direction being larger than that in the second direction. The coil windings extend along the first direction, reducing the winding spacing and utilizing the space of the magnetic core material to reduce costs and footprint.
This reduces the manufacturing cost of inductors, decreases the area occupied on circuit boards, and improves space utilization.
Smart Images
Figure CN224082298U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of inductance technology, and more particularly to an inductor, circuit device, and heating and ventilation system. Background Technology
[0002] Figure 1 This is a schematic diagram of a boost circuit board in the prior art. The boost circuit board includes an inductor 100 for power factor correction (PFC), which can be called a PFC inductor. PFC inductors occupy a relatively large area on the circuit board and are relatively expensive. Utility Model Content
[0003] This disclosure provides an inductor, circuit device, and HVAC system to solve or alleviate one or more technical problems in the prior art.
[0004] As a first aspect of the present disclosure, an embodiment of the present disclosure provides an inductor, including:
[0005] The magnetic core includes a first columnar body and a second columnar body disposed opposite to each other, both of which extend along a first direction. The magnetic core also includes a connector for connecting the corresponding ends of the first columnar body and the second columnar body. The connector is smoothly connected to both the first columnar body and the second columnar body. The size of the magnetic core in the first direction is larger than the size in the second direction. The second direction is the arrangement direction of the first columnar body and the second columnar body.
[0006] The coil includes at least a first winding and a second winding, the first winding being wound on a first column and the second winding being wound on a second column, the first winding and the second winding being connected in series.
[0007] In some embodiments, the first column and the second column are symmetrically arranged, and the first column and / or the second column are straight or curved.
[0008] In some embodiments, the cross-sections of the first column and / or the second column have the same shape as the cross-section of the connector.
[0009] In some embodiments, the cross-sectional shape of the magnetic core is circular, elliptical, or a polygon with a transitional arc.
[0010] In some embodiments,
[0011] The shape of the connector is arc-shaped; or,
[0012] The connector includes a main body segment and arc-shaped segments connected to both ends of the main body segment. The arc-shaped segments are smoothly connected to the main body segment and the first columnar body or the second columnar body.
[0013] In some embodiments, the two connectors include a first connector and a second connector. The first connector is used to smoothly connect the first ends of the first column and the second column, and the second connector is used to smoothly connect the second ends of the first column and the second column. The coil also includes a third winding, which is wound around the first connector and connected in series between the first winding and the second winding.
[0014] In some embodiments, the dimension of the first connector in the first direction is greater than or equal to the dimension of the second connector in the first direction.
[0015] In some embodiments, the magnetic core is a one-piece molded structure.
[0016] In some embodiments, the coil is made of round enameled wire or flat enameled wire.
[0017] In some embodiments, the coil is made of flat enameled wire, which is wound vertically on the magnetic core.
[0018] In some embodiments, the flat enameled wires in the first winding and the second winding are arranged alternately, and there is an overlapping area between the flat enameled wires in the first winding and the second winding.
[0019] In some embodiments, the system further includes a base, a magnetic core disposed on the base along a first direction, and a first winding and a second winding respectively provided with a first pin and a second pin, the first pin and the second pin passing through the base along the first direction.
[0020] As a second aspect of the present disclosure, the present disclosure provides a circuit device including a circuit board and an inductor according to any of the present disclosures. The inductor is disposed on the circuit board, and a first direction of the magnetic core of the inductor is perpendicular to the surface of the circuit board.
[0021] As a third aspect of the present disclosure, the present disclosure provides a heating, ventilation, and air conditioning system including the circuit device of the present disclosure.
[0022] The technical solution of this disclosure avoids right angles or sharp angles between the connector and the first and second pillars by setting the connector to be smoothly connected to the first and second pillars, which facilitates the winding of the coil and reduces the manufacturing cost of the inductor. Furthermore, by setting the size of the magnetic core in the first direction to be larger than the size in the second direction, compared with a circular magnetic core, the magnetic core shape of this disclosure is a smoothly connected long ring. When the first winding is set on the first pillar and the second winding is set on the second pillar, since both the first winding and the second winding extend along the first direction, the distance between the first winding and the second winding can be reduced, making fuller use of the space between the first and second pillars, reducing space waste, maximizing the use of the magnetic core material, and reducing the cost of the inductor.
[0023] In addition, inductors are usually placed on a circuit board. The size of the magnetic core in the first direction is larger than that in the second direction, so that the size of the inductor in the first direction is larger than that in the second direction. When the first direction of the inductor is placed on the circuit board parallel to the height direction, the inductor can make full use of the height space, thereby reducing the area occupied by the inductor on the circuit board.
[0024] The above overview is for illustrative purposes only and is not intended to be limiting in any way. Further aspects, embodiments, and features of this disclosure will become readily apparent from the accompanying drawings and the following detailed description, in addition to the illustrative aspects, embodiments, and features described above. Attached Figure Description
[0025] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to this disclosure and should not be construed as limiting the scope of this disclosure.
[0026] Figure 1 This is a schematic diagram of a boost circuit board in the prior art;
[0027] Figure 2 The diagram shows three types of PFC inductors in related technologies;
[0028] Figure 3A and Figure 3B This is a planar schematic diagram of an inductor according to an embodiment of the present disclosure;
[0029] Figure 4 This is a schematic diagram of the shape of the magnetic core in one embodiment of the present disclosure;
[0030] Figure 5A and Figure 5B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure;
[0031] Figure 6A and Figure 6B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure;
[0032] Figure 7A and Figure 7B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure;
[0033] Figure 8 This is a schematic diagram of a power supply system in one embodiment of the present disclosure.
[0034] Explanation of reference numerals in the attached figures:
[0035] 100. Coil; 11. First column; 12. Second column; 21. First coil; 22. Second coil; 23. Third coil; 31. Connector; 41. Base. Detailed Implementation
[0036] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure, and different embodiments can be combined arbitrarily without conflict. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0037] Figure 2 The diagram shows three types of PFC inductors in related technologies, such as... Figure 2 As shown, the core material of the PFC inductor 100 is a soft magnetic alloy, such as iron-silicon-aluminum, and ceramic insulating material is used for the distributed gaps. The PFC inductor 100 is typically circular in shape, and the winding can be either round enameled wire or flat enameled wire. For example, Figure 2 The inductor 100 shown in (A) uses round enameled wire, while the inductors 100 shown in (B) and (C) use flat enameled wire. For the inductor 100 using flat enameled wire, the magnetic core is made into a bracelet shape, which facilitates winding and saves on enameled wire.
[0038] Figure 2 The disadvantages of the three types of PFC inductors 100 shown are their relatively high cost and large footprint. The cost of a PFC inductor 100 is primarily determined by the magnetic core and enameled wire, specifically by the weight of the core material (e.g., iron, silicon, aluminum) and the weight of the enameled wire. Since the core material and enameled wire material have different prices, an optimal ratio of core to enameled wire is needed to ensure the lowest possible cost under certain performance requirements. Furthermore, for example... Figure 2 The space in the middle of the circular C of the medium-circular magnetic core is not utilized. However, the setting of the middle space makes the magnetic ring size large, which not only consumes materials, but also makes the middle space not fully utilized. This results in the high cost and large area occupied by the PFC inductor 100, making it impossible to set other components in the area where the PFC inductor 100 is set on the circuit board.
[0039] To address some problems in related technologies, this disclosure provides an inductor. It should be noted that, in this document, "Figure 3" includes... Figure 3A and Figure 3B The usage of Figures 5, 6, and 7 is the same as that of Figure 3.
[0040] Figure 3A and Figure 3B This is a planar schematic diagram of an inductor according to an embodiment of the present disclosure, wherein Figure 3AIt is a grayscale image. Figure 3B It is a black and white line drawing; Figure 4 This is a schematic diagram of the shape of the magnetic core in one embodiment of the present disclosure. As shown in FIG3, the inductor 100 includes a magnetic core and a coil. The magnetic core includes a first columnar body 11 and a second columnar body 12 disposed opposite to each other, both the first columnar body 11 and the second columnar body 12 extending along a first direction. The magnetic core also includes two connectors 31 for connecting corresponding ends of the first columnar body 11 and the second columnar body 12. For example, in FIG3, the upper connector 31a connects the upper ends of the first columnar body 11 and the second columnar body 12, and the lower connector 31b connects the lower ends of the first columnar body 11 and the second columnar body 12.
[0041] The connector 31 is smoothly connected to both the first columnar body 11 and the second columnar body 12. In this text, "smooth connection" can be understood as a tangential connection; for example, the connector 31 is tangentially connected to the first columnar body 11, thus the connection position between the connector 31 and the first columnar body 11 is smooth. The connector 31 is also smoothly connected to the second columnar body 12.
[0042] As shown in Figure 3, the magnetic core has dimensions L1 in a first direction and L2 in a second direction. The second direction is perpendicular to the first direction. The first direction is the extending direction of the first columnar body 11 and the second columnar body 12, and the second direction can be the arrangement direction of the first columnar body 11 and the second columnar body 12. In Figure 3, the first direction is vertical, and the second direction is horizontal. In this embodiment, the dimension L2 of the magnetic core in the first direction is greater than the dimension L2 in the second direction.
[0043] The coil includes at least a first winding 21 and a second winding 22. The first winding 21 is wound around a first column 11, and the second winding 22 is wound around a second column 12, as shown in Figure 3. The first winding 21 and the second winding 22 are connected in series. Exemplarily, as shown in Figure 3, enameled wire is wound upwards from the lower end of the first column 11 along its extending direction. After reaching the upper end of the first column 11, the enameled wire is wound downwards from the upper end of the second column 12 along its extending direction. The portion wound on the first column 11 and the portion wound on the second column 12 constitute the first winding 21. The distance between the first winding 21 and the second winding 22 in the second direction can be d1, as shown in Figure 3.
[0044] In related technologies, the magnetic core is toroidal. To wind the enameled wire around the toroidal core, a relatively large circular space (C) needs to be maintained at the center of the inductor 100. Figure 2 As shown, this results in the high cost and large footprint of inductor 100.
[0045] In this embodiment of the inductor 100, by setting the connector 31 to be smoothly connected to the first columnar body 11 and the second columnar body 12, right angles or sharp angles are avoided between the connector 31 and the first columnar body 11 and the second columnar body 12, which facilitates the winding of the coil and reduces the manufacturing cost of the inductor 100. Furthermore, the size of the magnetic core in the first direction is set to be larger than the size in the second direction. Compared with a circular magnetic core, the magnetic core shape of this disclosure is a smoothly connected long ring. When the first winding 21 is set on the first columnar body 11 and the second winding 22 is set on the second columnar body 12, since the first winding 21 and the second winding 22 both extend along the first direction, the distance d1 between the first winding 21 and the second winding 22 can be reduced, making fuller use of the space between the first columnar body 11 and the second columnar body 12, reducing space waste, maximizing the use of the magnetic core material, and reducing the cost of the inductor 100.
[0046] In addition, the inductor 100 is usually mounted on the circuit board. The size of the magnetic core in the first direction is larger than that in the second direction, so that the size of the inductor 100 in the first direction is larger than that in the second direction. When the first direction of the inductor 100 is mounted on the circuit board parallel to the height direction, the inductor 100 can make full use of the height space, thereby reducing the area occupied by the inductor 100 on the circuit board.
[0047] To further facilitate the fabrication of the inductor 100, the first column 11 and the second column 12 can be arranged symmetrically. Both the first column 11 and the second column 12 can be straight, as shown in Figure 3.
[0048] In another embodiment, the first columnar body 11 and the second columnar body 12 may be curved, such as... Figure 4 As shown. The magnetic core is elliptical in shape, and the first column 11 and the second column 12 can be the edges of the ellipse in the first direction.
[0049] It should be noted that the first columnar body 11 and the second columnar body 12 may also be asymmetrical, and their shapes may be the same or different. For example, the first columnar body 11 and the second columnar body 12 may have the same shape but different dimensions; or, their shapes and dimensions may be different, etc.
[0050] In this text, the first columnar body 11 and the second columnar body 12 extend along the first direction. This should be understood as the first columnar body 11 and the second columnar body 12 generally extending along the first direction. That is, the extension trend of the first columnar body 11 and the second columnar body 12 along the first direction is the first direction. For example, the first columnar body 11 and the second columnar body 12 can be a straight line extending along the first direction, or they can be an arc extending along the first direction.
[0051] As shown in Figure 3, the cross-sections of the first columnar body 11 and / or the second columnar body 12 have the same shape as the cross-section of the connecting body 31. This structure facilitates a smooth connection between the connecting body 31 and the first columnar body 11 and / or the second columnar body 12. In this text, the "cross-section" of A refers to the section of A perpendicular to its extension direction, as shown in Figure 3, where the cross-section of the first columnar body 11 is section BB.
[0052] In one embodiment, the cross-sectional shape of the magnetic core can be circular, elliptical, or a polygon with a transitional arc. This configuration results in a smooth surface for the magnetic core. When the enameled wire is wound around the magnetic core, the wire winds onto the smooth surface, facilitating the winding and preventing wear. Furthermore, it facilitates a smooth connection between the connector 31 and the first columnar body 11 and the second columnar body 12. In particular, setting the cross-sectional shape of the magnetic core to circular, elliptical, or a polygon with a transitional arc allows for easy winding of flat enameled wire around the magnetic core.
[0053] In this article, "the cross-section of the magnetic core" can be understood as the cross-section of the first column 11, the cross-section of the second column 12, or the cross-section of the connector 31.
[0054] In one embodiment, the cross-section of the first columnar body 11 and / or the second columnar body 12 is the same as the cross-section of the connecting body 31. Therefore, the cross-section of the magnetic core is identical everywhere in the circumferential direction of the core, resulting in a uniform distribution of magnetic flux lines in the inductor 100 and improving the performance of the inductor 100. Here, "identical cross-section" should be understood as having the same cross-sectional shape and size.
[0055] To achieve a smooth connection between the connector 31 and the first columnar body 11 and the second columnar body 12, as shown in Figure 3, the connector 31 may include a main body segment 311 and arc-shaped segments 312 connected to both ends of the main body segment 311. The arc-shaped segments 312 are smoothly connected to the main body segment 311 and to their respective columnar bodies. In Figure 3, the connector 31 includes a first arc-shaped segment 312a and a second arc-shaped segment 312b. The first arc-shaped segment 312a is smoothly connected to both the main body segment 311 and the first columnar body 11, and the second arc-shaped segment 312b is smoothly connected to both the main body segment 311 and the second columnar segment. For example, the arc-shaped segment 312 can be a quarter-circle arc, and its radius can be set as needed. The length L3 of the main body segment 311 can be set as needed.
[0056] In another embodiment, such as Figure 4 As shown, the shape of the connector 31 can be arc-shaped. For example, the shape of the connector 31 is a semi-circular arc, and the semi-circular arc-shaped connector 31 is smoothly connected to the first columnar body 11 and the second columnar body 12 respectively.
[0057] Figure 5A and Figure 5B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure, wherein Figure 5A It is a grayscale image. Figure 5B The diagram is in black and white. As shown in Figure 5, the two connecting bodies 31 include a first connecting body 31a and a second connecting body 31b. The first connecting body 31a is used to smoothly connect the first ends (upper ends in Figure 5) of the first columnar body 11 and the second columnar body 12, and the second connecting body 31b is used to smoothly connect the second ends (lower ends in Figure 5) of the first columnar body 11 and the second columnar body 12. The coil may also include a third winding 23, which is wound around the first connecting body 31a and connected in series between the first winding 21 and the second winding 22. Providing a third winding 23 on the first connecting body 31a increases the number of turns of the coil, makes fuller use of the magnetic core, and improves the performance of the inductor 100.
[0058] The dimension L4 of the first connector 31a in the first direction is greater than or equal to the dimension L5 of the second connector 31b in the first direction. To facilitate the placement of the third winding 23 on the first connector 31a, the dimension L4 of the first connector 31a can be larger than that of the second connector 31b without a winding. Therefore, compared to Figure 3, only the dimension L4 of the first connector 31a needs to be increased, while the dimension of the second connector 31b can be the same as that of the connector 31 in the first direction in Figure 3. This allows for maximum saving of the circumferential length of the magnetic core while increasing the number of coil turns, thus reducing costs.
[0059] For example, to facilitate the fabrication of the magnetic core, the second connector 31b can be set to be the same as the first connector 31a, so that the two connectors 31 have the same size in the first direction.
[0060] In one embodiment, the magnetic core can be a one-piece structure, that is, the first column 11, the second column 12 and the two connecting bodies 31 are a one-piece structure and are integrally formed.
[0061] In other embodiments, the first columnar body 11, the second columnar body 12, and the two connecting bodies 31 can be fabricated separately, and then the parts can be connected together to form a magnetic core.
[0062] The material of the magnetic core can be selected according to the requirements. For example, the magnetic core can be made of soft magnetic alloy materials, such as iron-silicon-aluminum.
[0063] The coil can be made of round enameled wire or flat enameled wire. In the embodiments shown in Figures 3 and 5, the coil uses flat enameled wire, which is wound vertically on the magnetic core. That is, the narrower surface of the flat enameled wire is in contact with the surface of the magnetic core.
[0064] Figure 6A and Figure 6B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure, wherein Figure 6A It is a grayscale image. Figure 6B The diagram is in black and white. In the embodiment shown in Figure 6, the coil uses circular enameled wire.
[0065] Figure 7A and Figure 7B This is a planar schematic diagram of an inductor according to another embodiment of the present disclosure, wherein Figure 7A It is a grayscale image. Figure 7B The diagram is in black and white. In the embodiments shown in Figures 3 and 5, the distance d1 between the first winding 21 and the second winding 22 in the second direction is greater than 0. In another embodiment, the distance d1 between the first winding 21 and the second winding 22 in the second direction can be less than 0, as shown in Figure 7.
[0066] In the embodiment shown in Figure 7, the flat enameled wires in the first winding 21 and the second winding 22 are arranged alternately, and there is an overlapping area between the flat enameled wires in the first winding 21 and the second winding 22, so that the spacing d1 is less than 0. With such an inductor 100, its size in the second direction can be further reduced, thereby further reducing the area occupied by the inductor 100 on the circuit board and maximizing the utilization of the magnetic core material.
[0067] As shown in Figures 3, 5, 6, and 7, the inductor 100 may further include a base 41, with the magnetic core disposed on the base 41 along a first direction, that is, the first direction is perpendicular to the base 41. The first winding 21 and the second winding 22 are respectively provided with a first pin 511 and a second pin 512, which pass through the base 41 along the first direction. For example, a first opening and a second opening may be provided on the base 41, with the first pin 511 passing through the first opening along the first direction and the second pin 512 passing through the second opening along the first direction. When the inductor 100 is disposed on a circuit board, the base 41 can be attached to the surface of the circuit board, thereby making full use of the height space and reducing the area occupied on the circuit board.
[0068] The base 41 can be made of insulating material, such as ceramic material.
[0069] Figure 8 This is a schematic diagram of a power supply system according to an embodiment of this disclosure. Figure 8 As shown, the power supply system includes an AC / DC conversion circuit, which includes a rectifier circuit 61 and a power factor correction circuit 62. The power supply system can provide power V0.
[0070] The power factor correction circuit may include the inductor 100 in any embodiment of this disclosure. The power factor correction circuit may also include capacitors, transistors, diodes, etc.
[0071] This disclosure also provides a circuit device including a circuit board and an inductor as described in any embodiment of this disclosure. The circuit board can be a printed circuit board (PCB). A rectifier circuit and a power factor correction circuit can be disposed on the circuit board. The inductor is disposed on the circuit board, and a first direction of the magnetic core of the inductor is perpendicular to the surface of the circuit board. With this arrangement, the larger dimension of the magnetic core of the inductor is located in the normal direction of the circuit board, while the dimension of the inductor in the direction parallel to the surface of the circuit board is relatively small. Compared with inductors in related technologies, the inductor of this disclosure embodiment occupies a smaller area on the circuit board.
[0072] This disclosure also provides a heating, ventilation, and air conditioning (HVAC) device, including the circuitry of this disclosure embodiment.
[0073] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.
[0075] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0076] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0077] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this disclosure. To simplify this disclosure, the components and arrangements of specific examples are described above. Of course, these are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0078] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this disclosure. Different parts of different embodiments can be combined with each other without conflict, and these should all be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. An inductor, characterized in that, include: A magnetic core includes a first columnar body and a second columnar body disposed opposite to each other, both the first columnar body and the second columnar body extending along a first direction. The magnetic core also includes a connector for connecting corresponding ends of the first columnar body and the second columnar body. The connector is smoothly connected to both the first columnar body and the second columnar body. The dimension of the magnetic core in the first direction is greater than the dimension in the second direction, where the second direction is the arrangement direction of the first columnar body and the second columnar body. The coil includes at least a first winding and a second winding, the first winding being wound on the first column and the second winding being wound on the second column, the first winding and the second winding being connected in series.
2. The inductor according to claim 1, characterized in that, The first column and the second column are symmetrically arranged, and the first column and / or the second column are straight or curved.
3. The inductor according to claim 1, characterized in that, The cross-sections of the first columnar body and / or the second columnar body have the same shape as the cross-section of the connector.
4. The inductor according to claim 3, characterized in that, The cross-sectional shape of the magnetic core is circular, elliptical, or polygonal with a transitional arc.
5. The inductor according to claim 1, characterized in that, The shape of the connector is arc-shaped; or... The connector includes a main body segment and arc-shaped segments connected to both ends of the main body segment, and the arc-shaped segments are smoothly connected to the main body segment and the first columnar body or the second columnar body.
6. The inductor according to claim 1, characterized in that, The two connecting bodies include a first connecting body and a second connecting body. The first connecting body is used to smoothly connect the first ends of the first column and the second column, and the second connecting body is used to smoothly connect the second ends of the first column and the second column. The coil also includes a third winding, which is wound around the first connecting body and connected in series between the first winding and the second winding.
7. The inductor according to claim 6, characterized in that, The dimension of the first connector in the first direction is greater than or equal to the dimension of the second connector in the first direction.
8. The inductor according to claim 1, characterized in that, The magnetic core is a one-piece molded structure.
9. The inductor according to any one of claims 1-8, characterized in that, The coil is made of round enameled wire or flat enameled wire.
10. The inductor according to any one of claims 1-8, characterized in that, The coil is made of flat enameled wire, which is wound vertically on the magnetic core.
11. The inductor according to claim 10, characterized in that, The flat enameled wires in the first winding and the second winding are arranged alternately, and there is an overlapping area between the flat enameled wires in the first winding and the second winding.
12. The inductor according to any one of claims 1-8, characterized in that, It also includes a base, the magnetic core is disposed on the base along the first direction, the first winding and the second winding are respectively provided with a first pin and a second pin, and the first pin and the second pin pass through the base along the first direction.
13. A circuit device, characterized in that, The invention includes a circuit board and an inductor as described in any one of claims 1-12, wherein the inductor is disposed on the circuit board and the first direction of the magnetic core of the inductor is perpendicular to the surface of the circuit board.
14. A heating, ventilation, and air conditioning system, characterized in that, Includes the circuit device as described in claim 13.