Inductor and vehicle

Abstract

The application relates to the technical field of inductors, in particular to a liquid-cooled inductor and a vehicle. The inductor comprises a magnetic core, a coil, an insulator, a first shell and a second shell, and the insulator fixes the magnetic core and the coil. The coil has a first side and a second side, the first side is opposite to the second side, the first shell is fixedly assembled on the first side, and the second shell is fixedly assembled on the second side. The first shell and the coil form a first flow channel, the second shell and the coil form a second flow channel, the first flow channel and the second flow channel are communicated and form a spiral flow channel, and the spiral flow channel is used for passing cooling liquid which contacts and cools the coil. The spiral flow channel extends around the coil, so that the spiral flow channel can more fully cool each part of the coil, the cooling liquid is more uniform in heat dissipation of the whole inductor, and the problem that the heat dissipation uniformity of the inductor using the cooling liquid is poor is improved.

Description

Technical Field

[0001] This application relates to the field of inductor technology, specifically to a liquid-cooled inductor and a vehicle. Background Technology

[0002] Currently, high-power inductors used in automobiles typically consist of a coil, a magnetic core, and an insulator. During operation, the coil and magnetic core generate significant heat. To maintain normal operation, inductors usually require heat dissipation. Specific heat dissipation methods include air cooling, water cooling, and thermal oil cooling. For example, Chinese patent application CN112735759A discloses a directly liquid-cooled inductor. This inductor improves heat dissipation efficiency by having the coolant contact the inductor windings and magnetic core. However, the coolant in the aforementioned inductor exhibits poor heat dissipation uniformity. Utility Model Content

[0003] The purpose of this application is to provide an inductor that improves the problem of poor heat dissipation uniformity in current inductors that use coolant.

[0004] The purpose of this application is also to provide a vehicle that uses the aforementioned inductor.

[0005] In a first aspect, one embodiment provides an inductor, comprising: magnetic core; A coil having a first side and a second side, the first side being opposite to the second side; An insulator that secures the magnetic core and the coil; A first housing and a second housing, wherein the first housing is fixedly assembled to the first side; and the second housing is fixedly assembled to the second side. The first housing and the coil form a first flow channel, and the second housing and the coil form a second flow channel. The first flow channel and the second flow channel are connected and form a spiral flow channel. The spiral flow channel extends around the coil to allow coolant to pass through and contact the coil for cooling.

[0006] Furthermore, in some embodiments, the first housing has a liquid inlet, and the first housing and the insulator form a first conductive channel, the liquid inlet being connected to the spiral channel through the first conductive channel.

[0007] Furthermore, in some embodiments, there are two or more spiral channels, and each spiral channel shares the liquid inlet.

[0008] Furthermore, in some embodiments, at least one of the spiral flow channels is a first spiral flow channel, and at least one spiral flow channel is a second spiral flow channel. The inlet of the first spiral flow channel is located on a first side of the coil, and the inlet of the second spiral flow channel is located on a second side of the coil. The first housing and the insulator form a first conductive flow channel, and the liquid inlet communicates with the inlet of the first spiral flow channel through the first conductive flow channel. The insulator has a second conductive flow channel, and the liquid inlet communicates with the inlet of the second spiral flow channel through the second conductive flow channel.

[0009] Furthermore, in some embodiments, one of the outlets of the first spiral flow channel and the second spiral flow channel is located on the first housing, and the other is located on the second housing.

[0010] Furthermore, in some embodiments, the magnetic core includes a central magnetic post and side magnetic posts, the central magnetic post extending along a first direction, the first side and the second side arranged along a second direction, the first direction being perpendicular to the second direction; at least one of the coils is a central coil wound around the central magnetic post, the insulator includes a magnetic post insulating portion covering the side magnetic posts, the first housing includes a first insert extending along a second direction, the first insert being inserted between the magnetic post insulating portion and the central coil to separate adjacent first flow channels; the first insert abuts against the side of the magnetic post insulating portion facing the central coil, such that adjacent first inserts, the central coil and the magnetic post insulating portion form part of the spiral flow channel.

[0011] Furthermore, in some embodiments, the second housing includes a second insert extending along a second direction, the second insert being inserted between the magnetic post insulating portion and the central coil to separate adjacent second flow channels; the second insert abuts against the side of the magnetic post insulating portion facing the central coil, such that adjacent second inserts, the central coil, and the magnetic post insulating portion form part of the spiral flow channel, and the tip of at least one second insert abuts against the tip of at least one first insert to separate adjacent spiral flow channels along the first direction.

[0012] Furthermore, in some embodiments, the number of the first insert teeth is two or more and adjacent first insert teeth are arranged at intervals along the first direction, and / or the number of the second insert teeth is two or more and adjacent second insert teeth are arranged at intervals along the first direction.

[0013] Furthermore, in some embodiments, the first housing is sealed to the insulator, and / or the second housing is sealed to the insulator.

[0014] Secondly, some embodiments provide a vehicle including a vehicle body and an inductor mounted on the vehicle body as described in any embodiment of the first aspect.

[0015] According to the inductor of the above embodiment, compared with the method of the flow channel passing through the coil surface in a straight line, the first housing of the inductor of this application forms a first flow channel with the coil, the second housing forms a second flow channel with the coil, and the first flow channel and the second flow channel are connected to form a spiral flow channel extending around the coil. The spiral flow channel can cool each part of the coil more fully, and the heat dissipation uniformity of the coolant on the whole inductor is better, which improves the problem of poor heat dissipation uniformity of inductors that currently use coolant. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the inductor structure in some embodiments; Figure 2 This is another schematic diagram of the inductor structure in some embodiments; Figure 3 Exploded views of the inductor in some embodiments; Figure 4 This is a cross-sectional view of the coil of an inductor in some embodiments (insulator not shown). Figure 5 This is a cross-sectional view of the inductor's liquid inlet in some embodiments; Figure 6 This is a schematic diagram of the structure of the first housing in some embodiments; Figure 7 These are schematic diagrams of the coil and insulator in some embodiments; Figure 8 This is a schematic diagram of the structure of the second housing in some embodiments; Figure 9 This is a schematic diagram showing the positions of the first and second housings in some embodiments.

[0017] List of feature names corresponding to the reference numerals in the figure: 1. Magnetic core; 11. Central magnetic column; 12. Side magnetic column; 2. Coil; 20. Central coil; 3. Insulator; 31. Second conductive channel; 32. Magnetic column insulating part; 4. First housing; 41. Liquid inlet; 42. First conductive channel; 43. First insert; 5. Second housing; 51. Second insert; 6. First channel; 7. Second channel; 8. Spiral channel; 81. First spiral channel; 811. Outlet; 82. Second spiral channel; 821. Outlet.

[0018] Explanation of reference numerals in parentheses in the accompanying drawings: The feature referred to by the reference numerals in parentheses in the accompanying drawings is the feature represented by both the number inside the parentheses and the number outside the parentheses. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0020] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0021] In the description herein, it should be understood that the terms “center,” “longitudinal,” “lateral,” “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 application 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 application.

[0022] 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 with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "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 or an electrical connection; they can refer to a direct connection, an abutment, 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 application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The embodiments described in the detailed implementation can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different embodiments. In order to avoid unnecessary repetition, the various possible combinations of the embodiments will not be described separately.

[0026] In some embodiments, please refer to Figures 1 to 9 The inductor includes a magnetic core 1, a coil 2, an insulator 3, a first housing 4, and a second housing 5. The insulator 3 fixes the magnetic core 1 and the coil 2. The coil 2 has a first side and a second side, which are opposite to each other. The first housing 4 is fixedly mounted on the first side, and the second housing 5 is fixedly mounted on the second side. The first housing 4 and the coil 2 form a first flow channel 6, and the second housing 5 and the coil 2 form a second flow channel 7. The first flow channel 6 and the second flow channel 7 are connected and form a spiral flow channel 8, through which coolant that contacts and cools the coil 2 passes. The spiral flow channel 8 extends around the coil 2, thus enabling more thorough cooling of all parts of the coil 2 and improving the uniformity of heat dissipation of the inductor as a whole, thereby improving the problem of poor heat dissipation uniformity in inductors currently using coolant. It is understood that the coolant in the embodiments of this application can be cooling oil or other feasible media such as cooling water.

[0027] In some embodiments, please refer to Figures 2 to 5The first housing 4 has a liquid inlet 41, and the first housing 4 and the insulator 3 form a first conductive flow channel 42. The liquid inlet 41 is connected to the spiral flow channel 8 through the first conductive flow channel 42. In some other embodiments, the liquid inlet 41 may also be directly connected to the spiral flow channel 8.

[0028] Furthermore, in some embodiments, please refer to Figures 5 to 9 There are two or more spiral flow channels 8, and each spiral flow channel 8 shares a common inlet 41. Two or more spiral flow channels 8 can accelerate the flow rate of the coolant. For some embodiments, please refer to... Figures 5 to 9 The number of spiral channels 8 is two. Of course, in some other embodiments, the number of spiral channels 8 may be only one, or it may be any other number of three or more.

[0029] Furthermore, in some embodiments, please refer to Figures 5 to 9 At least one spiral flow channel 8 is designated as a first spiral flow channel 81, and at least one spiral flow channel 8 is designated as a second spiral flow channel 82. The inlet of the first spiral flow channel 81 is located on the first side of the coil 2, and the inlet of the second spiral flow channel 82 is located on the second side of the coil 2. The first housing 4 and the insulator 3 form a first conductive flow channel 42, and the liquid inlet 41 is connected to the inlet of the first spiral flow channel 8 through the first conductive flow channel 42. The insulator 3 has a second conductive flow channel 31, and the liquid inlet 41 is connected to the inlet of the second spiral flow channel 8 through the second conductive flow channel 31. The first spiral flow channel 81 and the second spiral flow channel 82 share the liquid inlet 41, which simplifies the liquid supply pipeline, reduces the cost of the liquid supply pipeline, and reduces the space occupied by the liquid supply pipeline. Of course, in some other embodiments, the first spiral flow channel 81 and the second spiral flow channel 82 can also use their respective liquid inlets 41 independently.

[0030] Furthermore, in some embodiments, please refer to Figures 5 to 9 The outlet 811 of the first spiral flow channel 81 and the outlet 821 of the second spiral flow channel 82 are located on the first housing 4 and the other on the second housing 5. This provides ample space for connecting pipes in both outlets 811 and 821, making installation and operation more convenient. Of course, in some other embodiments, the outlets of the first spiral flow channel 81 and 82 can both be located on the first housing 4 or both on the second housing 5.

[0031] Furthermore, in some embodiments, please refer to Figure 4 The magnetic core 1 includes a central magnetic post 11 and side magnetic posts 12. The central magnetic post 11 extends along a first direction, and the first and second sides are arranged along a second direction, with the first and second directions perpendicular to each other. Please refer to [reference needed]. Figures 3 to 9At least one coil 2 is a central coil 20 wound around a central magnetic post 11. The insulator 3 includes a magnetic post insulating portion 32 covering a side magnetic post 12. The first housing 4 includes a first insert 43 extending in a second direction. The first insert 43 is inserted between the magnetic post insulating portion 32 and the central coil 20 to separate adjacent first flow channels 6. The first insert 43 is in contact with the side of the magnetic post insulating portion 32 facing the central coil 20, so that adjacent first inserts 43, the central coil 20, and the magnetic post insulating portion 32 form part of a spiral flow channel 8. The first insert 43 is inserted between the magnetic post insulating portion 32 and the central coil 2, and the side of the magnetic post insulating portion 32 facing the central coil 20 also forms the flow channel wall of the first flow channel 6. This allows the first flow channel 6 to be larger, increasing the flow rate of the coolant and improving the heat dissipation speed. In addition, the first insert 43 is installed in the central coil 20 and the insulator 3 by insertion, which can reduce the manufacturing difficulty of the inductor and reduce the processing cost. Of course, in some other embodiments, the magnetic column insulation portion 32 may not participate in forming the spiral flow channel 8, and the adjacent first insert teeth 43 are connected together to form part of the spiral flow channel 8 with the central coil 20. In this case, it is necessary to increase the distance between the side magnetic column 12 and the central coil 20 or reduce the flow area of ​​the first flow channel 6.

[0032] In some embodiments, the inductor has one coil. In other embodiments, the number of coils may be two or more.

[0033] Furthermore, in some embodiments, please refer to Figures 3 to 9 The second housing 5 includes a second insert 51 extending along a second direction. The second insert 51 is inserted between the magnetic pillar insulating portion 32 and the central coil 2 to separate adjacent second flow channels 7. The second insert 51 abuts against the side of the magnetic pillar insulating portion 32 facing the central coil 20, such that adjacent second inserts 51, the coil 2, and the magnetic pillar insulating portion 32 form part of a spiral flow channel 8. The tip of at least one second insert 51 abuts against the tip of at least one first insert 43 to separate adjacent spiral flow channels 8 along the first direction. For details, please refer to... Figure 9 The first tooth 43 and the second tooth 51 form a tooth pair, with the tip of the first tooth 43 abutting against the tip of the second tooth 51. In some embodiments, there are four tooth pairs. In some other embodiments, the tips of the first tooth 43 and the tips of the second tooth 51 may also abut against the insulator 3 respectively.

[0034] Furthermore, in some embodiments, please refer to Figures 3 to 9The number of first insert teeth 43 is two or more, and adjacent first insert teeth 43 are arranged at intervals along the first direction. Specifically, in some embodiments, there are two sets of first insert teeth 43, one set of first insert teeth 43 is located on the third side of the coil 2, and the other set of first insert teeth 43 is located on the fourth side of the coil 2. The third side and the fourth side are two opposite sides of the coil 2 in a third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction. It can be understood that two adjacent first insert teeth 43 refer to two adjacent first insert teeth 43 in the same set.

[0035] Specifically, in some embodiments, please refer to Figures 6 to 9 In one group of first insert teeth 43, there are four first insert teeth 43, and in another group, there are five first insert teeth 43.

[0036] In some embodiments, please refer to Figures 6 to 9 The number of second insert teeth 51 is two or more, and adjacent second insert teeth 51 are arranged at intervals along the first direction. Specifically, in some embodiments, there are two sets of second insert teeth 51, one set of second insert teeth 51 is located on the third side of the coil 2, and the other set of second insert teeth 51 is located on the fourth side of the coil 2. It can be understood that two adjacent second insert teeth 51 refer to two adjacent second insert teeth 51 in the same set. Specifically, in some embodiments, the number of second insert teeth 51 in each set is five.

[0037] In some embodiments, please refer to Figure 4 The first insert 43 is fitted with the coil 2 with a clearance. This utilizes the combined effects of liquid surface tension and capillary action to prevent coolant from flowing through, while also preventing the first insert 43 from scratching the coil 2, thus facilitating the assembly of the first insert 43. Similarly, in some embodiments, the second insert 51 is also fitted with the coil 2 with a clearance. Specifically, in some embodiments, the clearance between the first insert 43 and the coil 2 is 0.1-0.5 mm, and the clearance between the second insert 51 and the coil 2 is also 0.1-0.5 mm.

[0038] Furthermore, in some embodiments, please refer to Figures 1 to 5 The first housing 4 is sealed and installed on the insulator 3. Specifically, the first housing 4 and the insulator 3 can be fixed and assembled by any feasible method such as bonding or pressing. A reciprocating bending sealing surface is formed between the first housing 4 and the insulator 3. Of course, in some embodiments, the first housing 4 and the insulator 3 can also be sealed by a sealing ring.

[0039] Similarly, in some embodiments, please refer to Figures 1 to 5The second housing 5 is sealed and mounted on the insulator 3. Specifically, the second housing 5 and the insulator 3 can be fixed and assembled by any feasible method such as bonding or pressing. A reciprocating bending sealing surface is formed between the second housing 5 and the insulator 3. Of course, in some embodiments, the second housing 5 and the insulator 3 can also be sealed by a sealing ring.

[0040] In some vehicle embodiments, the vehicle includes a vehicle body and an inductor mounted on the vehicle body, wherein the inductor has the same structure as the inductor described in any of the above embodiments, and will not be described in detail here.

[0041] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. An inductor, characterized in that, include: magnetic core; A coil having a first side and a second side, the first side being opposite to the second side; An insulator that secures the magnetic core and the coil; A first housing and a second housing, wherein the first housing is fixedly assembled to the first side; The second housing is fixedly assembled to the second side; The first housing and the coil form a first flow channel, and the second housing and the coil form a second flow channel. The first flow channel and the second flow channel are connected and form a spiral flow channel. The spiral flow channel extends around the coil to allow coolant to pass through and contact the coil for cooling.

2. The inductor as described in claim 1, characterized in that, The first housing has a liquid inlet, and the first housing and the insulator form a first conductive flow channel, and the liquid inlet is connected to the spiral flow channel through the first conductive flow channel.

3. The inductor as described in claim 2, characterized in that, The number of spiral flow channels is two or more, and each spiral flow channel shares the liquid inlet.

4. The inductor as described in claim 3, characterized in that, At least one of the spiral flow channels is a first spiral flow channel, and at least one spiral flow channel is a second spiral flow channel. The inlet of the first spiral flow channel is located on a first side of the coil, and the inlet of the second spiral flow channel is located on a second side of the coil. The first housing and the insulator form a first conductive flow channel, and the liquid inlet is connected to the inlet of the first spiral flow channel through the first conductive flow channel. The insulator has a second conductive flow channel, and the liquid inlet is connected to the inlet of the second spiral flow channel through the second conductive flow channel.

5. The inductor as described in claim 4, characterized in that, The outlet of the first spiral flow channel and the outlet of the second spiral flow channel are located on the first housing and the other is located on the second housing.

6. The inductor according to any one of claims 1-5, characterized in that, The magnetic core includes a central magnetic post and side magnetic posts. The central magnetic post extends along a first direction, and the first side and the second side are arranged along a second direction, which is perpendicular to the second direction. At least one of the coils is a central coil wound around the central magnetic post. The insulator includes a magnetic post insulating portion covering the side magnetic posts. The first housing includes a first insert extending along a second direction. The first insert is inserted between the magnetic post insulating portion and the central coil to separate adjacent first flow channels. The first insert is in contact with the side of the magnetic post insulating portion facing the central coil, so that adjacent first inserts, the central coil, and the magnetic post insulating portion form part of the spiral flow channel.

7. The inductor as described in claim 6, characterized in that, The second housing includes a second insert extending in a second direction, the second insert being inserted between the magnetic post insulating portion and the central coil to separate adjacent second flow channels; The second insert tooth is in contact with the side of the magnetic pillar insulation portion facing the central coil, such that adjacent second insert teeth, the central coil, and the magnetic pillar insulation portion form part of the spiral flow channel, and the tooth tip of at least one second insert tooth abuts against the tooth tip of at least one first insert tooth to separate adjacent spiral flow channels along the first direction.

8. The inductor as claimed in claim 7, characterized in that, The number of the first insert teeth is two or more and adjacent first insert teeth are arranged at intervals along the first direction, and / or the number of the second insert teeth is two or more and adjacent second insert teeth are arranged at intervals along the first direction.

9. The inductor according to any one of claims 1-5, characterized in that, The first housing is sealed and mounted on the insulator, and / or the second housing is sealed and mounted on the insulator.

10. A vehicle, characterized in that, Includes a vehicle body and an inductor mounted on the vehicle body as described in any one of claims 1-9.

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