JP6878041B2 - Heat dissipation structure of heat generating parts - Google Patents

Description

The present invention relates to a heat dissipation structure of a heat generating component.

Conventionally, heat-generating parts that generate heat when energized, such as transformers used in power supply devices, are arranged so as to come into contact with heat-dissipating members such as heat sinks via parts (intervening parts) such as heat-dissipating sheets and resins. For example, in Patent Document 1, a transformer (heat generating component) is arranged on a heat sink, and the transformer is sandwiched and fixed between the heat sink and the heat sink by a mounting member, and a heat radiating sheet (intervening component) is provided between the mounting member and the transformer. ) Is provided. In this structure, the heat of the transformer can be released from the lower surface of the transformer to the heat sink, and from the upper surface of the transformer to the heat sink via the heat radiating sheet and the mounting member.

JP-A-2009-206308

However, in the above-mentioned conventional structure, since an intervening component such as a heat radiating sheet is interposed between the heat generating component and the heat radiating member, there is a problem that the number of parts required for radiating heat of the heat radiating component is increased. If the number of parts is large, the man-hours for manufacturing a product including the above structure will increase. Further, if the number of parts and the manufacturing man-hours are large, there arises a problem that the manufacturing cost of the product is high.
Further, in the above-mentioned conventional structure, since the heat-generating component is sandwiched between the mounting member and the heat sink, a load is applied to the heat-generating component, which is not preferable.

In view of the above circumstances, the present invention provides a heat-dissipating structure for heat-generating parts, which can reduce the number of parts required for heat-dissipating heat-generating parts and also prevent a load from being applied to the heat-generating parts. With the goal.

One aspect of the present invention includes a heat- generating component that generates heat when energized and a bottomed tubular heat-dissipating case that houses the heat-generating component, and the heat- dissipating case is formed on the inner peripheral surface of the heat-dissipating case. It has a plurality of flat plate-shaped first endothermic fins and a plurality of flat plate-shaped second endothermic fins formed on the bottom surface of the heat dissipation case, and the plurality of second endothermic fins are each said to be the first. (Ii) This is a heat dissipation structure of a heat generating component in which both ends of the endothermic fins are connected to and integrated with the first endothermic fins located on both ends.

According to the present invention, since the uneven surface is formed on the inner surface of the heat radiating case, the heat generated in the heat generating component can be efficiently released to the heat radiating case by heat radiation (heat radiation). As a result, the number of parts required for heat dissipation of the heat-generating component can be reduced as in the conventional case between the heat-generating component and the heat-dissipating case. Further, by reducing the number of parts, the man-hours for manufacturing a product including a heat dissipation structure can be reduced. Therefore, it is possible to reduce the manufacturing cost of the product including the heat dissipation structure.
Further, according to the present invention, since the heat generating parts are arranged at intervals with respect to the inner surface of the heat radiating case, it is possible to prevent the heat generating parts from being loaded. Therefore, it is possible to improve the reliability of the product including the heat dissipation structure.

It is a top view which looked at the heat dissipation structure of the heat generating component which concerns on 1st Embodiment of this invention from the opening side of the heat dissipation case. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is sectional drawing which shows the main part of the heat dissipation case which constitutes the heat dissipation structure of the heat generating component which concerns on other embodiment of this invention. It is a top view which looked at the main part of the heat-dissipating case which constitutes the heat-dissipating structure of the heat-generating component which concerns on another Embodiment of this invention from the opening side of the heat-dissipating case.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1-3.
As shown in FIG. 1-3, the heat radiating structure of the heat generating component according to the present embodiment includes the heat radiating component 1 and the heat radiating case 2.

The heat generating component 1 is a component that generates heat when energized. The heat generating component 1 may be a winding component such as a transformer or a choke coil provided in a product such as a power supply device. The heat generating component 1 of the present embodiment includes a main body portion 11 and terminals 12 provided on the surface of the main body portion 11.

The main body portion 11 is a portion that mainly generates heat when energized, and is a mass having a predetermined volume. The main body 11 may be formed in any shape, but in the present embodiment, it is formed in a rectangular parallelepiped.
The terminal 12 electrically connects the main body 11 together with the heat generating component 1 to the circuit board 3 that constitutes the circuit of a product such as a power supply device. The terminal 12 may be formed in any shape, but in the present embodiment, it is formed in a rod shape extending from the main body 11. The plurality of terminals 12 extend in the same direction from the main body 11. Further, the plurality of terminals 12 are provided on the same flat surface (upper surface) of the main body 11.

The heat radiating case 2 is formed in a bottomed tubular shape for accommodating the heat generating component 1 described above. For example, an electric component other than the heat generating component 1 and an electronic component (an electric component and an electronic component forming a circuit of the product together with the heat generating component 1) may be housed in the heat radiating case 2, but in the present embodiment, the heat generating component 1 may be accommodated. Only housed. The heat dissipation case 2 of the present embodiment mainly houses the main body 11 of the heat generating component 1.

An uneven surface 22 is formed on the inner surface 21 of the heat radiating case 2. The uneven surface 22 is formed on the inner surface 21 of the heat radiating case 2 at least on the surface of the heat generating component 1 (main body 11) housed in the heat radiating case 2 so as to face the region where heat is radiated. Good. That is, the uneven surface 22 may be formed on at least a part of the inner surface 21 of the heat dissipation case 2. In the present embodiment, the uneven surface 22 is formed on the entire inner surface 21 of the heat dissipation case 2.

In the present embodiment, the uneven surface 22 of the heat radiating case 2 is composed of a plurality of endothermic fins 24 projecting inside the heat radiating case 2. That is, the heat radiating case 2 of the present embodiment has a bottomed tubular case body 23 having a flat inner surface as compared with the uneven surface 22 of the heat radiating case 2, and a plurality of endothermic heat absorbing projects protruding from the inner surface of the case body 23. It includes fins 24.
The plurality of endothermic fins 24 may be formed separately from the case body 23 and then fixed to the case body 23, but in the present embodiment, they are formed integrally with the case body 23.

The flat inner surface of the case body 23 may include not only a simple flat surface but also a curved surface (curved surface), for example, a curved surface having a relatively small curvature. The inner surface of the case main body 23 may be formed in any shape, but in the present embodiment, the inner surface is formed in a shape that follows the shape of the heat generating component 1 (particularly the main body portion 11). More specifically, the inner surface of the case main body 23 in the present embodiment is five flat surfaces of the main body 11 of the heat generating component 1 which is a rectangular parallelepiped in a state where the main body 11 of the heat generating component 1 is housed in the heat dissipation case 2. It has five flat surfaces (inner peripheral surface 23a, bottom surface 23b) that can face each other so as to be parallel to each other.
Further, the appearance of the case main body 23 may be formed in any shape, but in the present embodiment, it is formed in a shape that follows the shape of the main body portion 11 of the heat generating component 1. That is, the appearance of the case body 23 of the present embodiment is formed in a rectangular parallelepiped shape with one surface as an opening.

In this embodiment, each endothermic fin 24 is formed in a flat plate shape. The width direction of each endothermic fin 24 is the direction in which the endothermic fin 24 projects inward from the inner surface of the case body 23 (projection direction), and the longitudinal direction of each endothermic fin 24 is the inner surface of the case body 23 (heat dissipation case). It is a direction extending along the inner surface 21). Further, the thickness direction of the heat absorbing fin 24, which is a direction orthogonal to the width direction and the longitudinal direction of each heat absorbing fin 24.

The endothermic fin 24 of the present embodiment includes a plurality of first endothermic fins 24A arranged on the inner peripheral portion of the heat radiating case 2 (inner peripheral surface 23a of the case main body 23).
Each endothermic fin 24A extends from the open end 2A of the heat dissipation case 2 toward the bottom 2B. One end of each of the first endothermic fins 24A in the longitudinal direction reaches the open end 2A of the heat dissipation case 2. Further, the other end of each of the first endothermic fins 24A in the longitudinal direction reaches the bottom portion 2B of the heat dissipation case 2. The longitudinal direction of each of the first endothermic fins 24A may be inclined with respect to, for example, the direction from the opening end 2A of the heat dissipation case 2 toward the bottom 2B (the depth direction of the heat dissipation case 2), but in the present embodiment. It coincides with the depth direction of the heat dissipation case 2.
The plurality of first endothermic fins 24A are arranged at intervals in the circumferential direction of the heat radiating case 2. In the present embodiment, each of the first endothermic fins 24A is arranged so that the plate thickness direction coincides with the arrangement direction of the plurality of first endothermic fins 24A.

Further, the endothermic fin 24 of the present embodiment also includes a plurality of second endothermic fins 24B arranged on the bottom 2B of the heat dissipation case 2 (bottom surface 23b of the case body 23).
Each second endothermic fin 24B extends along the bottom surface 23b of the case body 23. The plurality of second endothermic fins 24B are arranged at intervals so that their longitudinal directions coincide with each other (parallel to each other).

A part of the first endothermic fins 24A among the plurality of first endothermic fins 24A described above is connected to both ends of each second endothermic fin 24B in the longitudinal direction. That is, one second endothermic fin 24B and two first endothermic fins 24A are integrally formed. Second heat absorbing fins 24B and two first heat absorbing fin 24A of one formed integrally, arcuate endothermic formed in arcuate surrounding the heat-generating components housed in the heat radiating Case 2 1 (particularly the main body portion 11) It constitutes the fin 25.
A plurality (two or more) of the bow-shaped endothermic fins 25 are arranged at intervals in the plate thickness direction of the endothermic fins 24. The plurality of arched endothermic fins 25 are parallel to each other.

The remaining first heat absorbing fin 24A that does not form a bow-shaped heat absorbing fin 25 is arranged at a distance from the arcuate absorbing fin 25. Specifically, the ends of the remaining first endothermic fins 24A located on the bottom 2B side of the heat dissipation case 2 are located at intervals with respect to the bow-shaped endothermic fins 25 (second endothermic fins 24B). ..

Further, in the present embodiment, at least the uneven surface 22 of the inner surface 21 of the heat dissipation case 2 has an electrical insulating property.
For example, only the surface of the heat absorbing fin 24 may have electrical insulation, or only the uneven surface 22 of the heat radiating case 2 including the surface of the heat absorbing fin 24, or the entire inner surface 21 of the heat radiating case 2. , May have electrical insulation. Specifically, the heat radiating case 2 is made of a conductive material (for example, copper or aluminum), and the surface of the endothermic fin 24 and the inner surface 21 of the heat radiating case 2 including the heat absorbing fin 24 are made of an insulating paint or the like. A thin film may be formed. Further, for example, the heat absorbing fin 24 and the heat radiating case 2 including the heat absorbing fin 24 may be made of a material having an electrically insulating property.

Further, in the present embodiment, at least the uneven surface 22 of the inner surface 21 of the heat dissipation case 2 is black. For example, the entire inner surface 21 of the heat dissipation case 2 may be black. In order to make the uneven surface 22 and the entire inner surface 21 of the heat radiating case 2 including the uneven surface 22 black, for example, the heat radiating case 2 itself may be made of a black material, or the heat radiating case 2 which is not black may be formed. After forming, a black thin film may be formed on the uneven surface 22 or the entire inner surface 21 of the heat dissipation case 2.

Further, in the present embodiment, a plurality of outer heat radiating fins 26 are provided on the outer surface of the heat radiating case 2. The plurality of outer heat radiating fins 26 are arranged so as to be spaced apart from each other. Each outer heat radiation fin 26 may be formed in a rod shape, for example, but in the present embodiment, it is formed in a plate shape. The plurality of outer heat radiating fins 26 are arranged at intervals in the plate thickness direction thereof.

The plurality of outer heat radiating fins 26 may be integrally formed with, for example, the heat radiating case 2 (case body 23), but in the present embodiment, the heat radiating case 2 is formed separately from the heat radiating case 2. It is fixed to the outer surface by screwing or the like. Specifically, the plurality of outer heat radiating fins 26 are integrally formed with the base portion 31, and together with the base portion 31, form the heat sink 30. The base portion 31 of the illustrated example is formed in a flat plate shape, but the present invention is not limited to this. The base portion 31 may be formed at least in a shape that makes surface contact with the outer surface of the heat dissipation case 2.
The outer heat radiating fin 26 is not limited to the outer surface corresponding to the bottom 2B of the heat radiating case 2 as shown in the illustrated example, and may be provided on the outer surface corresponding to the side portion of the heat radiating case 2, for example.

The heat dissipation case 2 and the heat sink 30 including the outer heat dissipation fins 26 are preferably made of a material having high thermal conductivity (for example, copper or aluminum).

In the heat radiating structure of the heat radiating component according to the present embodiment, the heat radiating component 1 (particularly the main body 11) housed in the heat radiating case 2 is arranged at intervals with respect to the uneven surface 22 of the heat radiating case 2. .. Specifically, the heat generating component 1 is arranged at intervals with respect to the tip of the heat absorbing fin 24 forming the uneven surface 22 of the heat radiating case 2 in the protruding direction. It is more preferable that the distance between the uneven surface 22 and the heat generating component 1 is small. Further, the distance between the heat generating component 1 and the endothermic fins 24 may be equal to each other or the difference between the plurality of endothermic fins 24 may be small.

Further, in the heat dissipation structure of the present embodiment, the main body 11 of the heat generation component 1 is housed in the heat dissipation case 2 so that the terminal 12 of the heat generation component 1 projects to the outside of the heat dissipation case 2. Further, the circuit board 3 connected to the terminal 12 of the heat generating component 1 is arranged so as to cover the opening of the heat radiating case 2. The circuit board 3 may come into contact with, for example, the opening end 2A of the heat radiating case 2, that is, the opening of the heat radiating case 2 may be closed, but in the present embodiment, the circuit board 3 may be spaced from the opening end 2A of the heat radiating case 2. It is arranged open. It is preferable that the distance between the open end 2A of the heat radiating case 2 and the circuit board 3 is narrow.
In the heat radiating structure of the present embodiment, in order to dispose the heat generating component 1 with the uneven surface 22 of the heat radiating case 2 at intervals, for example, a spacer is provided between the open end 2A of the heat radiating case 2 and the circuit board 3. The circuit board 3 may be supported by the base portion 31 of the heat sink 30.

In the heat radiating structure of the present embodiment, various electric parts and electronic parts (not shown) constituting the circuit of the product are arranged together with the heat generating part 1 on the outside of the heat radiating case 2. In other words, the heat radiating case 2 is interposed between the heat generating component 1 and various electric components and electronic components. These electric components and electronic components may be mounted on the outer region of the heat dissipation case 2 of the circuit board 3, for example.

Next, the operation of the heat dissipation structure of the present embodiment described above will be described.
The heat generated in the heat generating component 1 by energization is radiated from the surface of the heat generating component 1 (particularly the surface of the main body 11) and transmitted to the inner surface 21 of the heat radiating case 2 facing the surface of the heat generating component 1. That is, the heat generated in the heat generating component 1 can be transferred to the heat radiating case 2 by heat radiation (heat radiation).
Further, the heat transferred from the heat generating component 1 to the heat radiating case 2 can be dissipated from the outer surface of the heat radiating case 2 into the air outside the heat radiating case 2. For example, by flowing air outside the heat radiating case 2 using a fan or the like, the heat of the heat radiating case 2 can be dissipated into the air outside the heat radiating case 2.

According to the heat dissipation structure of the present embodiment, the following effects are obtained.
In the heat dissipation structure of the present embodiment, the uneven surface 22 is formed on the inner surface 21 of the heat dissipation case 2 facing the surface of the heat generating component 1. As a result, the area of the inner surface 21 of the heat radiating case 2 increases, so that the heat radiated from the surface of the heat generating component 1 can be efficiently transferred to the inner surface 21 of the heat radiating case 2. That is, the heat generated in the heat generating component 1 can be efficiently released to the heat radiating case 2 by heat radiation (heat radiation). Therefore, it is not necessary to interpose an intervening component as in the conventional case between the heat generating component 1 and the heat radiating case 2, and the number of components required for heat dissipation of the heat radiating component 1 can be reduced. Further, by reducing the number of parts, the man-hours for manufacturing the product including the heat dissipation structure can be reduced, so that the manufacturing cost of the product including the heat dissipation structure can be reduced.

Further, according to the heat radiating structure of the present embodiment, the heat generating parts 1 are arranged at intervals with respect to the inner surface 21 of the heat radiating case 2. Therefore, it is possible to prevent a load from being applied to the heat generating component 1. Therefore, it is possible to improve the reliability of the product including the heat dissipation structure.

Further, in the heat radiating structure of the present embodiment, the heat generating component 1 is housed in the heat radiating case 2. As a result, even if air is allowed to flow outside the heat radiating case 2 in order to release heat from the heat radiating case 2, the heat generating component 1 can be protected from dust and the like. Therefore, it is possible to improve the reliability of the product including the heat dissipation structure.

Further, in the heat dissipation structure of the present embodiment, the uneven surface 22 of the heat dissipation case 2 is composed of a plurality of endothermic fins 24. Therefore, the area of the uneven surface 22 in the heat dissipation case 2 can be effectively increased. As a result, the heat radiated from the surface of the heat generating component 1 can be efficiently transferred to the heat radiating case 2.

Further, in the heat dissipation structure of the present embodiment, at least the uneven surface 22 of the heat dissipation case 2 has an electrical insulating property. Therefore, even if the uneven surface 22 of the heat radiating case 2 is brought close to the heat generating component 1, it is possible to prevent an electrical short circuit from occurring between the heat radiating case 2 and the heat generating component 1. Further, since the uneven surface 22 of the heat radiating case 2 can be brought close to the heat generating component 1, the heat radiated from the surface of the heat radiating component 1 can be efficiently transferred to the heat radiating case 2.

Further, in the heat dissipation structure of the present embodiment, at least the uneven surface 22 of the heat dissipation case 2 is black. As a result, the heat radiated from the surface of the heat generating component 1 can be efficiently absorbed by the uneven surface 22. That is, the heat of the heat generating component 1 can be efficiently transferred to the heat dissipation case 2.

Further, in the heat dissipation structure of the present embodiment, a plurality of outer heat dissipation fins 26 are provided on the outer surface of the heat dissipation case 2. Therefore, by actively flowing air on the outside of the heat radiating case 2 by a fan or the like, the heat transferred from the heat radiating case 2 to the outer heat radiating fins 26 is efficiently dissipated into the air outside the heat radiating case 2. can do. As a result, the heat generating component 1 can be efficiently cooled.
In order to cool the heat generating component 1 more efficiently, the air flow direction on the outside of the heat radiating case 2 is set to the longitudinal direction of the outer heat radiating fins 26 so that the air flows between the adjacent outer heat radiating fins 26. Is more preferable.

Further, in the heat dissipation structure of the present embodiment, the first endothermic fin 24A extends from the open end 2A of the heat dissipation case 2 toward the bottom 2B. Further, a plurality of first endothermic fins 24A are arranged at intervals in the circumferential direction of the heat radiating case 2. As a result, a groove (recess) extending from the bottom 2B side of the heat radiating case 2 to the opening end 2A and opening to the outside of the heat radiating case 2 is formed between the adjacent first heat absorbing fins 24A.
Therefore, air is interposed between the heat generating component 1 and the heat radiating case 2, and the air flow (heat convection) between the heat generating component 1 and the inner surface 21 of the heat radiating case 2 due to the heat radiation of the heat generating component 1. ) Occurs, the air interposed between the heat generating component 1 and the heat radiating case 2 tends to flow in the longitudinal direction of the groove. As a result, air can easily flow between the inside and the outside of the heat radiating case 2, and the heat of the heat generating component 1 can be efficiently dissipated to the outside of the heat radiating case 2.

Further, in the heat dissipation structure of the present embodiment, the bow-shaped endothermic fin 25 is composed of two first endothermic fins 24A and one second endothermic fin 24B. Further, a plurality of bow-shaped endothermic fins 25 are arranged at intervals in the plate thickness direction of the endothermic fins 24. As a result, both ends of the groove (recess) formed between the adjacent bow-shaped heat absorbing fins 25 in the longitudinal direction are opened from the opening end 2A of the heat radiating case 2 to the outside of the heat radiating case 2.
Therefore, air is interposed between the heat generating component 1 and the heat radiating case 2, and an air flow (heat convection) occurs between the heat generating component 1 and the heat radiating case 2 due to the heat radiation of the heat generating component 1. In this case, air easily flows from one end to the other end in the longitudinal direction of the groove that opens to the outside of the heat dissipation case 2. As a result, the heat radiated from the surface of the heat generating component 1 facing the bottom 2B of the heat radiating case 2 can be efficiently released to the outside of the heat radiating case 2.

Further, in the mounting structure of the present embodiment, the heat generating component 1 is housed in the heat radiating case 2, and various electric components and electronic components (not shown) constituting the product circuit together with the heat generating component 1 are outside the heat radiating case 2. ) Is arranged. That is, the heat radiating case 2 is interposed between the heat generating component 1 and various electric components and electronic components. Further, as described above, the heat generated in the heat generating component 1 is efficiently transferred to the heat radiating case 2 by heat radiation (heat radiation). Therefore, it is possible to prevent the heat generated in the heat generating component 1 from being directly transferred to various electric components and electronic components. Therefore, it is possible to prevent various electric parts and electronic parts from being affected by the heat generated in the heat generating part 1 and to protect various electric parts and electronic parts. In other words, it is possible to protect the circuit of the product composed of the heat generating component 1 and various electric components and electronic components.

Although the details of the present invention have been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

In the present invention, the endothermic fin 24 is not limited to being formed in a flat plate shape, but may be formed in at least a plate shape. As shown in FIGS. 4 and 5, for example, the endothermic fin 24 may be formed in a plate shape in which the dimension in the plate thickness direction (plate thickness dimension) changes in the width direction and the longitudinal direction of the endothermic fin 24.

The endothermic fin 24 illustrated in FIG. 4 is formed in a plate shape in which the plate thickness dimension (dimension in the left-right direction in FIG. 4) changes in the longitudinal direction (vertical direction in FIG. 4 ) of the endothermic fin 24. Specifically, the plate thickness of the heat-absorbing fins 24 is smaller toward the other end of the heat absorbing fins 24 from one end of the heat absorbing fin 24 in the longitudinal direction of the heat absorbing fin 24. Further, the endothermic fin 24 illustrated in FIG. 4 is the first endothermic fin 24A, and the plate thickness dimension of the first endothermic fin 24A decreases from the bottom 2B of the heat dissipation case 2 toward the opening end 2A. The endothermic fin 24 illustrated in FIG. 4 is the first endothermic fin 24A, but may be, for example, the second endothermic fin 24B.

The endothermic fin 24 illustrated in FIG. 5 has a plate shape whose plate thickness dimension (horizontal dimension in FIG. 5) changes in the width direction of the endothermic fin 24 (vertical direction in FIG. 5; projecting direction of the endothermic fin 24). It is formed. Specifically, the endothermic fins 24 are formed in a tapered shape that becomes smaller toward the tip of the endothermic fins 24 in the protruding direction. The endothermic fin 24 illustrated in FIG. 5 is the first endothermic fin 24A, but may be, for example, the second endothermic fin 24B.

When the plate thickness dimension of the endothermic fin 24 changes in the width direction or the longitudinal direction, compared with the case where the plate thickness dimension of the endothermic fin 24 is constant (when the endothermic fin 24 has a flat plate shape), The area of the uneven surface 22 in the heat radiating case 2 can be effectively increased. Specifically, the area of the main surface of the endothermic fin 24 facing in the plate thickness direction can be increased. As a result, the heat radiated from the heat generating component 1 can be efficiently transferred to the endothermic fins 24.

Further, as illustrated in FIG. 5, when the endothermic fin 24 is formed in a tapered shape that becomes smaller toward the tip of the endothermic fin 24 in the protruding direction, the endothermic fin facing the surface of the heat generating component 1 The area of 24 (projected area) can be effectively increased. As a result, the heat radiated from the heat generating component 1 can be more efficiently transferred to the endothermic fins 24.

In the present invention, the uneven surface 22 of the heat radiating case 2 is not limited to the plurality of heat absorbing fins 24, and may be composed of, for example, a plurality of protrusions protruding inward of the heat radiating case 2. The protrusion may be formed in any shape such as a rod shape or a hemispherical shape. In this case, the plurality of protrusions may be arranged, for example, at intervals from each other. Further, the protrusions may be formed in a tapered shape like the endothermic fins 24 illustrated in FIG.

1 Heat-generating component 2 Heat-dissipating case 2A Opening end 2B Bottom 21 Inner surface 22 Concavo-convex surface 24 Endothermic fin 24A First endothermic fin 24B Second endothermic fin 25 Arched endothermic fin 26 Outer heat-absorbing fin

Claims (4)

Heat-generating parts that generate heat when energized and
A bottomed tubular heat-dissipating case for accommodating the heat-generating parts is provided.
The heat dissipation case is
A plurality of flat plate-shaped first endothermic fins formed on the inner peripheral surface of the heat dissipation case,
It has a plurality of flat plate-shaped second endothermic fins formed on the bottom surface of the heat dissipation case.
Each of the plurality of second endothermic fins has a heat dissipation structure of a heat generating component in which both ends of the second endothermic fin are connected to and integrated with the first endothermic fin located on both end sides. At least one of the first endothermic fin and the second endothermic fin has a shape in which the plate thickness dimension of the endothermic fin becomes smaller from one end to the other end in the longitudinal direction of the endothermic fin. The heat dissipation structure of the heat generating component according to claim 1. Claim that the endothermic fin at least one of the first endothermic fin and the second endothermic fin has a tapered shape in which the plate thickness dimension of the endothermic fin becomes smaller toward the tip in the protruding direction of the endothermic fin. The heat dissipation structure of the heat generating component according to 1. The heat-dissipating structure for a heat-generating component according to any one of claims 1 to 3, wherein a plurality of heat-dissipating fins are provided on the outer surface of the heat-dissipating case.

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