PFC inductor structure with heat dissipation function

Abstract

The utility model relates to a PFC (power factor correction) inductance structure with a heat dissipation function, which comprises at least one inductance device and a mounting base body for arranging the inductance device, the mounting base body comprises a heat-conducting heat dissipation frame, at least one accommodating cavity is dug in the heat dissipation frame, each accommodating cavity is correspondingly provided with one inductance device, and the inductance device is arranged in the accommodating cavity. Each containing cavity is correspondingly provided with a cover plate so as to cover the containing cavity, a gap between the interior of each containing cavity and the corresponding inductor device is filled with pouring sealant, and the cover plates are provided with a plurality of exhaust holes communicated with the containing cavities. According to the inductor structure, the whole heat dissipation frame is adopted, the structure is flat, the inductors are contained in the containing cavities of the heat dissipation frame, the inductors can be fixed and protected conveniently, disassembly and assembly are convenient, heat dissipation is uniform, the heat dissipation effect is good, and the use experience of a user is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply structures, in particular to a PFC inductor structure with a self-heating function. Background Art

[0002] Commonly used components in power supply products include capacitors and inductors. Since inductors are wound with many turns of coil, they are easy to generate heat and are one of the heat sources. Under conventional designs, PFC inductors rely on fans to dissipate heat, but the heat dissipation effect is poor. When the power supply is working, the temperature of the PFC inductor is high, and the heat is not discharged in time, which affects the life of the PFC inductor and the performance of the whole machine. Moreover, when multiple inductors are installed at the same time, it is inevitable that the heat dissipation of each inductor is uneven.

[0003] In addition, in the traditional power supply structure, the PFC inductor is directly mounted on the PCB board, which is prone to skewness. If it is not assembled properly, there is a risk of interference with surrounding components. Secondly, the PFC inductor relies solely on fan cooling, which has a small heat dissipation area and poor heat dissipation effect. Long-term high temperature will affect the life of the PFC inductor and the performance of the whole machine. Then, in the existing structural design, the PFC inductor is exposed on the PCB board surface, which is easy to scratch the insulation layer on the outer surface during the assembly process, and it is easy to cause a short circuit. Utility Model Content

[0004] In view of this, a PFC inductor structure with a self-heating function is provided, which has good heat dissipation effect, flat structure, convenient disassembly and assembly, and is safe and reliable.

[0005] A PFC inductor structure with a self-heating function comprises at least one inductor device and a mounting base for mounting the inductor device, wherein the mounting base comprises a heat conductive heat dissipation frame, wherein at least one cavity is dug in the heat dissipation frame, wherein each cavity is correspondingly provided with one inductor device, wherein each cavity is correspondingly provided with a cover plate to cover the cavity, wherein a gap between the inside of the cavity and the inductor device is filled with potting glue, and wherein the cover plate is provided with a plurality of exhaust holes which are communicated with the cavity.

[0006] Preferably, there are a plurality of the inductor components, and a plurality of cavities are formed in the heat dissipation frame, and the interiors of the plurality of cavities are interconnected.

[0007] In some preferred embodiments, the adjacent side walls of the plurality of cavities are provided with notches to allow the interiors of the adjacent cavities to be interconnected.

[0008] Preferably, the cover plate is provided with three or more exhaust holes at positions corresponding to the inductor components, and each exhaust hole is a square hole or a circular hole with different sizes.

[0009] Specifically, the heat sink is a structure integrally formed of a thermally conductive material.

[0010] In some preferred embodiments, the edges of both sides of the cover plate are respectively provided with lugs extending downward, and the outer side wall of each cavity is provided with a concave edge, and the lugs are correspondingly assembled in the concave edge.

[0011] Furthermore, the lug is provided with at least one card slot or card block, and the wall surface of the concave edge is correspondingly provided with a card block or card slot, and each card slot is correspondingly buckled with a card block.

[0012] Furthermore, the cover plate is provided with a through hole to allow the coil end of the inductor to extend out.

[0013] In some preferred embodiments, the heat sink is rectangular as a whole, the cover is in the shape of a rectangular sheet, the cavity is a cylindrical cavity, and the cover is in the shape of a rectangular sheet and is a plastic cover.

[0014] In some preferred embodiments, the plurality of cavities are substantially on the same horizontal plane and share a common bottom of a heat sink, the heat sink is an integrally formed structure, and the inductor device is a PFC inductor.

[0015] In the above-mentioned PFC inductor structure with self-heating function, a whole heat sink is used, the structure is flat, and each inductor is accommodated in the cavity of the heat sink, which is convenient for fixing the inductor and disassembly and assembly, and the heat dissipation is uniform and the heat dissipation effect is good, so it has at least the following advantages:

[0016] 1. Through overall heat dissipation, it can effectively prevent the inductor from overheating and affecting its life and overall performance, thereby increasing the service life of the inductor, improving overall performance, and reducing the probability of failure. The device is safer and more reliable, and has a good market prospect;

[0017] 2. By using a whole heat sink, it can avoid poor heat dissipation caused by uneven assembly of inductors, while meeting the aesthetic requirements of the product;

[0018] 3. Each inductor is housed in the cavity of the heat sink to avoid scratching the insulation layer on the outer surface of the inductor during assembly, thereby reducing the number of parts replacements;

[0019] 4. The inductor is easy to install and disassemble, which saves assembly time and has high work efficiency. Under the condition that the same functions are met, the surface temperature of the product of this embodiment is low and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a PFC inductor structure with a self-heating function provided by an embodiment of the utility model.

[0021] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the partial separation of the PFC inductor structure with its own heat dissipation function.

[0022] In the attached figure:

[0023] 100, inductor structure; 11, heat sink; 12, cavity; 13, concave edge; 15, notch; 20, inductor device; 25, slot; 30, cover; 33, lug; 35, block; 36, exhaust hole; 37, perforation. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 and Figure 2 , shows a PFC inductor structure 100 with self-heating function provided by an embodiment of the utility model, including at least one inductor device 20 and a mounting base for mounting the inductor device 20, the mounting base including a heat conductive heat dissipation frame 11, at least one cavity 12 is dug in the heat dissipation frame 11, each cavity 12 is correspondingly mounted with one inductor device 20, each cavity 12 is correspondingly equipped with a cover plate 30 to cover the cavity 12, the gap between the cavity 12 and the inductor device 20 is filled with potting glue, and the cover plate 30 is provided with a plurality of exhaust holes 36 that penetrate the cavity 12. Wherein, the inductor device is a PFC inductor.

[0026] Specifically, the heat sink 11 is a structure integrally formed of a thermally conductive material, for example, copper or aluminum. In the specific embodiment shown in the figure, the heat sink 11 is rectangular as a whole, such as a rectangle as shown in the figure. The cover plate 30 is in the shape of a rectangular sheet, and the cavity 12 is a cylindrical cavity. The cover plate 30 is in the shape of a rectangular sheet and is a plastic cover plate 30. As shown in the figure, the cover plate 30 is square, and the cavity 12 is a cylindrical cavity dug in the center of the square. The peripheral side walls of the cavity 12 are symmetrical and uniform, so that the heat dissipation is more uniform.

[0027] In some preferred embodiments, there are multiple inductance devices 20, and multiple cavities 12 are dug in the heat sink 11, and the interiors of the multiple cavities 12 are interconnected. Specifically, multiple cavities 12 are provided with notches 15 in the adjacent side walls to allow the interiors of adjacent cavities 12 to be interconnected. This not only makes the heat dissipation more uniform, but also facilitates one-time pouring during the glue pouring. During production, the PFC inductance device 20 is assembled in the cavity 12 of the heat sink 11, and then silicone AB glue is poured into the cavity 12, which has the functions of heat conduction, moisture resistance, and corrosion resistance. The glue pouring in the multiple cavities 12 is connected as a whole, which facilitates more sufficient and uniform heat dissipation as a whole.

[0028] As shown in the figure, specifically, the edges of both sides of the cover plate 30 extend downwards to form lugs 33, and the outer wall of each cavity 12 is provided with a concave edge 13, and the lugs 33 are correspondingly assembled in the concave edge 13. The concave edge 13 is formed by digging the outer wall edge of the heat dissipation frame 11 corresponding to each cavity 12, that is, the dug recess just accommodates and fills the lug 33, and the surface of the lug 33 is the same smooth surface as the outer wall surface.

[0029] Furthermore, the lug 33 is provided with at least one slot 25 or block 35, and the wall surface of the concave edge 13 is correspondingly provided with a block 35 or slot 25, and each slot 25 is correspondingly engaged with a block 35. There are two pairs of slots 25 or blocks 35, arranged along the length direction.

[0030] Preferably, the cover plate 30 is provided with three or more exhaust holes 36 at positions corresponding to the inductor 20, and each exhaust hole 36 is a square hole or a circular hole with different sizes. The function of the exhaust holes 36 is to allow the gas generated after the installed components are baked and cured by the AB glue to be discharged from the exhaust holes 36. In addition, the cover plate 30 is provided with a through hole 37 to allow the coil end of the inductor 20 to extend out, so as to facilitate electrical connection with other electronic components.

[0031] In some preferred embodiments, the plurality of cavities 12 are substantially on the same horizontal plane and share the bottom of the heat sink 11, and the heat sink 11 is an integrally formed structure. The bottom of the heat sink 11 is a smooth bottom with a smooth and flat bottom surface, which is convenient for overall installation on the PCB board.

[0032] The above-mentioned PFC inductor structure with self-heating function has at least the following advantages:

[0033] 1. The heat dissipation is performed by the whole heat sink 11, which can effectively prevent the inductor 20 from being overheated and affecting the life and performance of the whole machine, thereby increasing the service life of the inductor 20, improving the performance of the whole machine, and reducing the probability of failure, which has a good market prospect;

[0034] 2. By using a whole heat sink 11, and the heat sink 11 is a rectangular body, each outer surface is relatively flat and smooth, and the inductor 20 is accommodated inside, so as to avoid the poor heat dissipation effect caused by uneven assembly of the inductor 20, and at the same time meet the aesthetic requirements of the product, neat and generous;

[0035] 3. Each inductor is accommodated in the cavity 12 of the heat sink 11 to prevent the insulation layer on the outer surface of the inductor 20 from being scratched during assembly, thereby reducing the number of parts replacements and improving customer user experience;

[0036] 4. The inductor device 20 is easy to install and disassemble, which saves assembly time and has high work efficiency. Under the condition that the same functions are met, the product of this embodiment has a low surface temperature and a long service life.

[0037] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art may also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A PFC inductor structure with a self-heating function, comprising at least one inductor device and a mounting base for mounting the inductor device, characterized in that: The mounting base includes a heat-conductive heat sink, wherein at least one cavity is dug inside the heat sink, each cavity is correspondingly provided with one of the inductance devices, each cavity is correspondingly provided with a cover plate to cover the cavity, a gap between the inside of the cavity and the inductance device is filled with potting glue, and the cover plate is provided with a plurality of exhaust holes that penetrate the cavity.

2. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: There are a plurality of inductor components, and a plurality of cavities are dug inside the heat dissipation frame, and the interiors of the plurality of cavities are interconnected.

3. The PFC inductor structure with self-heating function as claimed in claim 2, characterized in that: The adjacent side walls of the multiple cavities are provided with notches to allow the interiors of the adjacent cavities to be interconnected.

4. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: The cover plate is provided with more than three exhaust holes at positions corresponding to the inductor, and each exhaust hole is a square hole or a circular hole with different sizes.

5. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: The heat sink is a structure integrally formed of a thermally conductive material.

6. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: The edges of both sides of the cover plate are respectively extended downwards to form lugs, and the outer side wall of each cavity is provided with a concave edge, and the lugs are correspondingly assembled in the concave edge.

7. The PFC inductor structure with self-heating function as claimed in claim 6, characterized in that: The lug is provided with at least one clamping groove or clamping block, and the wall surface of the concave edge is correspondingly provided with a clamping block or a clamping groove, and each clamping groove is correspondingly buckled with a clamping block.

8. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: The cover plate is provided with a through hole to allow the coil end of the inductor to extend out.

9. The PFC inductor structure with self-heating function as claimed in claim 1, characterized in that: The heat dissipation frame is rectangular as a whole, the cover plate is in the shape of a rectangular sheet, the cavity is a columnar cavity, and the cover plate is in the shape of a rectangular sheet and is a plastic cover plate.

10. The PFC inductor structure with self-heating function as claimed in claim 2, characterized in that: The plurality of cavities are substantially on the same horizontal plane and share the bottom of a heat sink, the heat sink is an integrally formed structure, and the inductor device is a PFC inductor.

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