Magnetic element adopting phase-change self-circulation heat-conducting fin

Abstract

The utility model discloses a magnetic element adopting a phase-change self-circulation heat-conducting fin, which comprises a magnetic element main body (1) and a phase-change self-circulation heat-conducting fin (2), and the phase-change self-circulation heat-conducting fin (2) is attached to a coil (11) of the magnetic element main body in an insulating manner so as to dissipate heat of the coil (11); the shape of the phase-change self-circulation heat-conducting fin is manufactured according to the shape of the coil so as to be suitable for being attached to the coil.

Description

Technical Field

[0001] This utility model relates to the field of magnetic component technology, specifically to a magnetic component (especially a transformer or inductor) employing a phase change self-circulating heat-conducting sheet. Background Technology

[0002] Magnetic components, especially high-power magnetic components, commonly suffer from high temperatures and uneven temperature distribution. Phase change self-circulating heat sinks, with their excellent thermal conductivity, can effectively solve this problem for high-power magnetic components. The principle is to attach a phase change self-circulating heat sink with high thermal conductivity to areas of high heat generation, poor heat dissipation, and localized high temperatures within the product. This rapidly transfers heat to the heat dissipation area, thereby reducing the product temperature and improving the temperature distribution. Furthermore, phase change materials can absorb some heat energy during the liquid-to-gas conversion process, possessing a certain capacity to store heat. This can buffer short-term thermal shocks during product use, extending the product's lifespan. Utility Model Content

[0003] The main purpose of this invention is to propose a magnetic element using a phase change self-circulating heat-conducting sheet to solve the heat dissipation defects of high-power magnetic elements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A magnetic element employing a phase change self-circulating heat-conducting sheet includes a magnetic element body and a phase change self-circulating heat-conducting sheet. The phase change self-circulating heat-conducting sheet is insulated and attached to the coil of the magnetic element body to dissipate heat from the coil. The shape of the phase change self-circulating heat-conducting sheet is made according to the shape of the coil to be suitable for attachment to the coil.

[0006] Furthermore, the structure of the phase change self-circulating heat-conducting sheet, from the inside out, consists of a liquid-gas phase change material layer, a metal body layer, and an external insulating layer.

[0007] Furthermore, the metal body layer of the phase change self-circulating heat-conducting sheet is made of copper or aluminum.

[0008] Furthermore, the liquid-gas phase change material layer of the phase change self-circulating heat-conducting sheet is made of water, ether, or a mixture of the two.

[0009] Furthermore, the external insulating layer of the phase change self-circulating heat-conducting sheet is either sprayed with insulating varnish or covered with insulating tape.

[0010] Furthermore, the phase change self-circulating heat-conducting sheet is attached to the coil using thermally conductive gel.

[0011] Furthermore, the main body of the magnetic element includes a mounting bracket, a magnetic core, a frame, and a plurality of coils; the magnetic core is mounted on the mounting bracket and includes a plurality of magnetic core columns; the frame includes a plurality of cylindrical supports, which are respectively fitted onto the plurality of magnetic core columns; the plurality of coils are respectively fitted onto the plurality of cylindrical supports.

[0012] Furthermore, the phase change self-circulating heat-conducting plate has an arc-shaped U, C, "7" shape or a cylindrical shape with open ends, and its arc is consistent with the arc of the outer contour of the coil.

[0013] Furthermore, the gap between the phase change self-circulating heat-conducting sheet and the coil is filled with thermally conductive gel.

[0014] The beneficial effects of this utility model are reflected in the following: This utility model adopts a contour-designed heat-conducting sheet that is insulated and bonded to the heating component (coil), achieving efficient all-round heat conduction and dissipation of the coil. This design has a good effect on improving heat dissipation for natural heat dissipation, air cooling, and water cooling.

[0015] In addition, the heat-conducting sheet uses a metal with good thermal conductivity (such as copper or aluminum) as the main body and is filled with a phase change material with high thermal conductivity (such as water, ether, or a mixture of the two). In this way, after the metal body of the heat-conducting sheet absorbs the heat from the coil, it dissipates the heat on one hand and transfers it to the internal phase change material, causing it to change from liquid to gas and absorb heat. This temporarily stores heat and buffers short-term thermal shocks during product use. Then, during the process of changing from gas to liquid, the heat is dissipated from the metal body. This not only prevents short-term thermal shocks but also provides good heat dissipation for the product.

[0016] Furthermore, thermal conductive gel is used to fill the gap between the thermal conductive sheet and the coil to ensure its thermal conductivity; at the same time, the thermal conductive sheet is fixed and installed by the curing of the thermal conductive gel, which is convenient to use and achieves two goals at once. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the magnetic element of the phase change self-circulating heat-conducting sheet used in an embodiment of this utility model.

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 The exploded view of the magnetic element shown. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The embodiments provided are for illustrative purposes only and are not intended to be limiting. Furthermore, the spatial directional terms such as "upper," "lower," "left," "right," "top," and "bottom" used in the description of the technical solution of the present invention are for the convenience of describing the relative positional relationships between the product's constituent components. They do not imply that the product only has the orientation shown in the drawings. In actual use, as the product's orientation changes, the spatial descriptions used to describe its orientation should also be interpreted in a similar manner. In addition, terms such as "first" and "second" are only used to distinguish components. It should be understood that these components should not be limited by such terms, and they do not inherently imply that these components have the aforementioned ordinal numbers, nor do they represent the arrangement order of one component with another or the order of manufacturing methods.

[0020] Please refer to Figure 1 and Figure 2 This utility model provides a magnetic element using a phase change self-circulating heat-conducting sheet, including a magnetic element body 1 and a phase change self-circulating heat-conducting sheet 2. The magnetic element body 1 includes a mounting bracket 10, a coil 11, a magnetic core 12, a frame 13, a frame end cap 14, and a magnetic core end cap 15. The magnetic core 12 is embedded in the groove of the mounting bracket 10 for assembly and fixation. The frame 13 is fitted onto the central column of the magnetic core 12. The coil 11 is fitted onto the frame 13, with the coil leads passing through corresponding openings in the mounting bracket 10. The frame end cap 14 is fitted onto the end of the coil and snapped into the frame 13 for fixation. The magnetic core end cap 15 is embedded into the opening of the frame end cap 14 and bonded to the end face of the central column of the magnetic core 12 for fixation. Further, the mounting bracket 10 and the magnetic core 12 are bonded with adhesive, the magnetic core end cap 15 and the frame end cap 14 are bonded with adhesive, and the coil leads are bonded to the mounting bracket 10 with adhesive. A phase-change self-circulating heat-conducting sheet 2 is insulated and attached to the coil 11 to dissipate heat from the coil 11. The shape of the phase-change self-circulating heat-conducting sheet 2 is made according to the shape of the coil 11, that is, it is designed to conform to the shape of the coil so as to fit onto the coil.

[0021] The phase change self-circulating heat-conducting sheet 2 of this utility model has a structure consisting of a liquid-gas phase change material layer, a metal body layer, and an external insulating layer, from the inside out. The metal body layer uses copper, aluminum, or other materials with good thermal conductivity and relatively low cost. The liquid-gas phase change material filled within the metal body has a thermal conductivity of 3000–20000 W / (m*K). In this embodiment, water, ether, or a mixture of both are used, which can significantly improve the product's temperature characteristics, reducing the temperature by 10%–50%. The insulating layer covering the metal body can be, for example, sprayed insulating varnish or wrapped with insulating tape. To better ensure heat dissipation, the phase change self-circulating heat-conducting sheet 2 is coated with thermally conductive adhesive and then attached to the outside of the coil, ensuring that the gap between the heat-conducting sheet and the coil is filled with thermally conductive adhesive as much as possible. Simultaneously, the curing of the thermally conductive adhesive secures the heat-conducting sheet.

[0022] It should be noted that, Figure 2 The structure of the magnetic component shown is merely illustrative; the shapes and structures of the magnetic core and frame are only schematic. Furthermore, the number of core pillars, the number of cylindrical supports in the frame, and the number of coils are also illustrative. In designs with multiple core pillars and cylindrical supports, the number of coils corresponds accordingly. That is, multiple cylindrical supports of the frame are respectively fitted onto multiple core pillars, and multiple coils are respectively fitted onto multiple cylindrical supports. A heat-conducting plate 2 can be placed between two adjacent coils, or a heat-conducting plate can be attached to each coil. The heat-conducting plate 2 has a curved U-shape, C-shape, "7" shape, or a cylindrical shape open at both ends. Its curvature matches the outer contour curvature of the coil, as long as it fits the coil as closely as possible. Figure 1 and Figure 2 In the illustrated embodiment, the heat-conducting plate 2 is shaped like a curved "7". One such heat-conducting plate is inserted between every two adjacent coils. The vertical portion of the heat-conducting plate can dissipate heat from areas between adjacent coils that are difficult to cool, while the horizontal portion can make more full contact with the outside air (or fan air) to quickly remove heat. This is just an example; the heat-conducting plate 2 can also be U-shaped or a cylindrical shape with open ends, fitted onto the coil. Each coil can be equipped with one heat-conducting plate, or even two C-shaped heat-conducting plates can be mated and fitted onto one coil.

[0023] As can be seen, the magnetic element using a phase-change self-circulating heat-conducting sheet provided in this embodiment of the invention has better heat dissipation and resistance to short-term thermal shock. Therefore, compared with existing products, under the same temperature resistance conditions, the product can generate more heat due to its stronger heat dissipation capacity, which means that the cross-sectional area of ​​the wire and the cross-sectional area of ​​the magnetic core can be reduced, thus reducing the product size and saving material costs.

[0024] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several equivalent substitutions or obvious modifications can be made without departing from the concept of the present invention, and all such modifications, with identical performance or use, should be considered within the protection scope of the present invention.

Claims

1. A magnetic element employing a phase change self-cycling heat conducting sheet, characterized by: The magnetic element body (1) and the phase-change self-circulation heat-conducting sheet (2) are included, and the phase-change self-circulation heat-conducting sheet (2) is insulated and attached to the coil (11) of the magnetic element body to dissipate heat of the coil (11); the shape of the phase-change self-circulation heat-conducting sheet is made according to the shape of the coil to be suitable for attaching to the coil.

2. The magnetic element of claim 1, wherein: The structure of the phase-change self-circulation heat-conducting sheet is sequentially liquid-gas phase-change material layer, metal body layer and external insulation layer from inside to outside.

3. The magnetic element of claim 2, wherein: The metal body layer of the phase-change self-circulation heat-conducting sheet is made of copper or aluminum.

4. The magnetic element of claim 2 wherein: the first and second magnetic layers are formed of a material having a perpendicular magnetic anisotropy. The liquid-gas phase-change material layer of the phase-change self-circulation heat-conducting sheet is made of water, diethyl ether or a mixture of the two.

5. The magnetic element as described in claim 2, characterized in that: The external insulation layer of the phase-change self-circulation heat-conducting sheet is sprayed insulation paint or wrapped insulation tape.

6. The magnetic element of any one of claims 1 to 5, wherein: The phase-change self-circulation heat-conducting sheet is pasted to the coil by heat-conducting gel.

7. The magnetic element of any one of claims 1 to 5, wherein: The magnetic element body includes a mounting bracket, a magnetic core, a framework and a plurality of coils; the magnetic core is mounted on the mounting bracket and includes a plurality of magnetic core columns; the framework includes a plurality of cylindrical supports which are respectively and one-to-one correspondingly sleeved on the plurality of magnetic core columns; and the plurality of coils are respectively and one-to-one correspondingly sleeved on the plurality of cylindrical supports.

8. The magnetic element of claim 7, wherein: The phase-change self-circulation heat-conducting sheet has a U-shaped, C-shaped, "7"-shaped or open-ended cylindrical shape with a curvature, and the curvature is consistent with the curvature of the outer contour of the coil.

9. The magnetic element of claim 8, wherein: The gap between the phase-change self-circulation heat-conducting sheet and the coil is filled with heat-conducting gel.

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