TW202021072A - Heat radiator, cooling device - Google Patents

Abstract

The present invention provides a heat radiator or the likes that has a plurality of fins with intervals in highly accurate uniformity. A heat radiator includes a plurality of fins (11) that are plate-shaped and aligned in a direction orthogonal to the plate surface, and a plurality of protruding portions (12) that are protruding toward the outside of each of the plurality of fins (11), wherein end portions of adjacent protruding portions (12) among the plurality of protruding portions (12) in the arranging direction of the plurality of fins (11) contact with each other.

Description

Radiator, cooling device

The invention relates to a radiator and a cooling device.

In recent years, as a radiator for a liquid-cooled cooling device, a radiator having a plurality of fin plates has been proposed. The liquid-cooled cooling device is used for power control devices mounted on electric vehicles, hybrid vehicles, electric cars, etc. IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and other power devices (semiconductor elements) for cooling.

For example, the radiator for a liquid-cooled cooling device described in Patent Document 1 is composed of a plurality of fin plates and a connecting member that integrally connects all the fin plates. The fin plate is composed of a vertically rectangular flat plate body and narrow width portions integrally provided at both ends of the plate body. All fin plates are arranged at intervals in the plate thickness direction of the plate body. The connecting member is a corrugated shape composed of a flat plate portion provided integrally with the narrow width portion of the plate body, and an arc-shaped portion that alternately connects adjacent flat plate portions at the upper and lower ends. The thickness of the board body, the narrow width portion and the flat plate portion are equal, and the two side surfaces of the board body, the two side surfaces of the narrow width portion and the two side surfaces of the flat plate portion are on the same plane.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2018-107365

In an apparatus that uses a plurality of fins to cool a heat generating body such as a power device, in order to be able to cool the heat generating body equally, it is desirable that cooling water flows uniformly through the gap between the fins adjacent to each other. Therefore, it is desirable that the intervals of the plurality of fins be uniform.

An object of the present invention is to provide a heat sink and the like that can accurately match the intervals of a plurality of fins.

The present invention accomplished based on this object is a heat sink having a plurality of fins arranged in a direction orthogonal to the plate surface and a plurality of protrusions protruding outward from each of the plurality of fins; The adjacent protrusions of the plurality of protrusions are in contact with each other in the arrangement direction of the plurality of fins.

Here, the fin may have a rectangular shape, and the protrusion may protrude outward from an end of the fin in the longitudinal direction.

In addition, the protruding portion may have a plate shape in which the arrangement direction of the plurality of fins is parallel to the plate surface.

In addition, the end of the protruding portion on the one side in the arrangement direction may have a parallel portion parallel to the plate surface of the fin, a convex portion protruding from the parallel portion on the one side, and the other side The end portion has a parallel portion on the other side parallel to the plate surface of the fin and a concave portion recessed from the parallel portion on the other side; the parallel portion on the one side and the parallel portion on the other side at the adjacent protruding portion In the contact state, the convex portion and the concave portion are fitted.

In addition, the fin may have a rectangular shape, and the protruding portion may be provided at a central portion in the width direction of the fin.

Alternatively, the fin may be rectangular, and the protrusion may be provided at one end of the fin in the width direction.

In addition, adjacent protrusions may be joined by welding or adhesion.

In addition, from another point of view, the present invention is a heat sink having a plate-shaped rectangular fins arranged in a direction orthogonal to the plate surface, and from the longitudinal direction of each of the fins A plurality of protrusions whose ends protrude outward; adjacent protrusions among the plurality of protrusions are joined by welding or adhesion.

In addition, from another point of view, the present invention is a cooling device including: the above-mentioned heat sink; and a case that houses the heat sink and allows a cooling liquid to flow between a plurality of fins of the heat sink.

According to the present invention, it is possible to provide a heat sink and the like that can accurately match the intervals of a plurality of fins.

1‧‧‧Liquid cooling device

10, 200, 300, 400, 500, 600 ‧‧‧ radiator

11, 211, 311, 411, 511, 611

12, 212, 312, 412

12l‧‧‧Left protrusion

12r‧‧‧ Right protrusion

13, 213, 313, 413

14‧‧‧ Flow path between fins

15‧‧‧Front flow path

16‧‧‧ Rear flow path

17‧‧‧Bending piece

20‧‧‧Housing

21‧‧‧Body body

21a‧‧‧Top

21b‧‧‧Side

21c‧‧‧Flange

21d‧‧‧Through hole for entrance

21e‧‧‧Through hole for export

22‧‧‧ Cover

23‧‧‧Into the side space

24‧‧‧ Outflow side space

30‧‧‧Inlet connector

31, 41‧‧‧Cylinder

32、42‧‧‧Cuboid

33, 43, 221‧‧‧Through hole

40‧‧‧Export connector

121, 122, 421, 422

121a, 421a ‧‧‧ parallel side

121b, 421b‧‧‧Convex

122a, 422a‧‧‧Parallel on the other side

122b, 422b‧‧‧recess

131, 231, 331‧‧‧ First connection

132, 232, 332

150‧‧‧Laser device

151‧‧‧ laser head

171‧‧‧Bending Department

172, 173‧‧‧ gap

611a‧‧‧base

611b‧‧‧Column

I‧‧‧Insulation parts

M‧‧‧Plate

L‧‧‧Laser

P‧‧‧Heating body

FIG. 1 is a perspective view of the liquid-cooled cooling device of the first embodiment.

Fig. 2 is a cross-sectional view of the II-II portion of Fig. 1.

FIG. 3 is a cross-sectional view of the III-III portion of FIG. 2.

FIG. 4 is a diagram for explaining the method of manufacturing the heat sink.

FIG. 5 is a diagram for explaining the method of manufacturing the heat sink.

Fig. 6 is a perspective view showing a state where the projections are welded by laser welding.

Fig. 7 is an enlarged view of the bent piece.

Fig. 8 is a diagram showing a modification of the protruding portion.

Fig. 9 is a schematic configuration diagram of a heat sink according to a second embodiment.

Fig. 10 is a diagram showing a state where the heat sink and the cover are joined.

Fig. 11 is a schematic configuration diagram of a heat sink according to a third embodiment.

Fig. 12 is a schematic configuration diagram of a heat sink according to a fourth embodiment.

Fig. 13 is a schematic configuration diagram of a heat sink according to a fifth embodiment.

Fig. 14 is a schematic configuration diagram of a heat sink according to a sixth embodiment.

Hereinafter, the embodiments will be described in detail with reference to the drawings.

<First embodiment>

FIG. 1 is a perspective view of the liquid-cooled cooling device 1 of the first embodiment.

Fig. 2 is a cross-sectional view of the II-II portion of Fig. 1.

FIG. 3 is a cross-sectional view of the III-III portion of FIG. 2.

The liquid-cooled cooling device 1 of the embodiment includes a radiator 10 having a plurality of rectangular fins 11 and a case 20 that houses the radiator 10. In addition, the liquid-cooled cooling device 1 has an inlet connector 30 that allows the cooling liquid to flow into the interior from the outside of the housing 20 and an outlet connector 40 that allows the cooling liquid to flow out from the inside of the housing 20 to the outside. Hereinafter, the longitudinal direction of the rectangular fins 11 may be referred to as the left-right direction, the width direction of the fins 11 may be referred to as the up-down direction, and the arrangement direction of the plurality of fins 11 may be referred to as the front-rear direction.

The liquid-cooled cooling device 1 adopts a pair of cooling fluid flowing in the inside of the housing 20 and the radiator 10 to be mounted on the outer surface of the housing 20 (the upper surface in this embodiment) via a flat insulating member I. The heating element P cools the device. The heating element P can be exemplified as a power semiconductor device such as an insulated gate bipolar transistor (IGBT (Insulated Gate Bipolar Transistor)). In addition, the heating element P can be exemplified as an IGBT module in which an IGBT and a control circuit that controls the IGBT are encapsulated, and an intelligent power module in which the IGBT module and a self-protection function are encapsulated.

(Case 20)

The case 20 has a case body 21 through which the heating element P is assembled via the insulating member I, and a cover 22 covering the opening of the case body 21.

The case body 21 has a flat top 21a, side portions 21b protruding from each end of the top 21a in a direction (downward) orthogonal to the top 21a, and each end from the side 21b is in front of the side 21b The flange portion 21c protruding outward in the direction of intersection. In the center part of the surface (upper surface) of the top part 21a opposite to the side where the side part 21b is provided, the heating element P is mounted via the insulating member I. Further, in the top portion 21a, on the outer sides of the left and right directions of the portion where the insulating member I and the heating element P are arranged, an inlet through-hole 21d and an outlet through-hole penetrating so as to communicate the inside and the outside of the housing 20 are formed 21e.

The cover 22 has a flat plate shape and a rectangular shape, and is larger than the flange portion 21c of the case body 21. At four corners of the cover 22, through holes 221 through which bolts and the like for attaching the liquid-cooled cooling device 1 to other components are formed are formed.

The case 20 is formed into a box shape by brazing the flange portion 21c of the case body 21 and the cover 22 so that the radiator 10 can be housed inside. The case body 21 and the cover 22 can be exemplified and formed using an aluminum brazing sheet. At this time, the hard solder layer is arranged on at least one side facing each other.

In addition, the case body 21 and the cover 22 are brazed to form an inflow side space 23 below the inlet through-hole 21d in the housing 20 and below the outlet through-hole 21e in the housing 20 Outflow side space 24.

(Inlet connector 30)

The inlet joint 30 has a cylindrical cylindrical portion 31 and a rectangular parallelepiped-shaped portion 32, and a cavity is formed inside to allow the cooling liquid to circulate. One end portion (right end portion) of the cylindrical portion 31 is opened, and the other end portion is connected to the rectangular parallelepiped portion 32. On one surface (lower surface) of the rectangular parallelepiped portion 32, a through-hole 33 communicating the inside and the outside of the inlet joint 30 is formed. The inlet joint 30 is brazed to the housing body in a state where the surface formed with the through-hole 33 is placed on the surface (upper surface) of the heating element P in the top portion 21a of the housing body 21 体21. At this time, the interior of the inlet joint 30 communicates with the interior of the housing body 21 via the through hole 33 of the inlet joint 30 and the inlet through hole 21d of the housing body 21.

(Outlet connector 40)

The outlet joint 40 has a cylindrical cylindrical portion 41 and a rectangular parallelepiped-shaped portion 42, and is formed with a cavity inside to allow the cooling liquid to circulate. One end (left end) of the cylindrical portion 41 is opened, and the other end is connected to the rectangular parallelepiped portion 42. On one surface (lower surface) of the rectangular parallelepiped portion 42 is formed a through hole 43 that communicates the inside and the outside of the outlet fitting 40. The outlet joint 40 is brazed to the case body 21 in a state where the surface formed with the through-hole 43 is placed on the surface (upper surface) of the heating element P in the top portion 21 a of the case body 21. At this time, the interior of the outlet joint 40 communicates with the interior of the housing body 21 via the through hole 43 of the outlet joint 40 and the outlet through hole 21 e of the housing body 21.

(Radiator 10)

The heat sink 10 has a plurality of fins 11 that are plate-shaped and arranged in a direction perpendicular to the plate surface, a plurality of protrusions 12 provided outside each of the plurality of fins 11, and a connection between the fins 11 and the protrusions 12 Connecting part 13.

The fins 11 have a rectangular shape and are arranged such that the width direction of the fins 11 becomes the up-down direction shown in FIG. 1 and the longitudinal direction of the fins 11 becomes the left-right direction shown in FIG. 1. In addition, the plurality of fins 11 are arranged at predetermined intervals (hereinafter, sometimes referred to as “predetermined intervals”) in a direction orthogonal to the surface of the fins 11. The plurality of fins 11 are arranged so that the arrangement direction becomes the front-rear direction shown in FIG. 1.

The protruding portion 12 has a left protruding portion 12 l and a right protruding portion 12 r that protrude outward from both end portions in the longitudinal direction of the fin 11. The left protrusion 12l and the right protrusion 12r are bilaterally symmetrical. Hereinafter, as a representative, the left protruding portion 12l will be described. In addition, the left side protrusion 12 l and the right side protrusion 12 r may be collectively referred to as the protrusion 12.

The protruding portion 12 has a plate shape in which the arrangement direction (front-rear direction) of the plurality of fins 11 is parallel to the plate surface. The end 121 on one side in the arrangement direction of the protrusions 12 has a side parallel to the plate surface of the fin 11 The parallel portion 121a and the convex portion 121b protruding from the parallel portion 121a on one side. In addition, the other end 122 in the arrangement direction of the protruding portions 12 has the other parallel portion 122 a parallel to the plate surface of the fin 11 and a concave portion 122 b recessed from the other parallel portion 122 a. As shown in FIG. 3(b), the convex portion 121b and the concave portion 122b are formed in a semicircular shape.

In addition, the ends of adjacent protrusions 12 in the arrangement direction of the fins 11 among the plurality of protrusions 12 provided in the plurality of fins 11 are in contact with each other. In other words, one side parallel portion 121 a of the one protruding portion 12 is in contact with the other side parallel portion 122 a of the protruding portion 12 disposed on the front side of the one protruding portion 12. In addition, the other parallel portion 122 a of the one protruding portion 12 is in contact with the one parallel portion 121 a of the protruding portion 12 disposed on the rear side of the one protruding portion 12.

Therefore, the interval between one fin 11 and the fins 11 disposed before and after the one fin 11 is determined by the protrusion 12 provided on the outer side of the one fin 11 in the arrangement direction (front-rear direction) of the fins 11 Size to determine. In addition, when the sizes of the plurality of protrusions 12 are the same, the intervals between the plurality of fins 11 become the same.

In the heat sink 10 of the present embodiment, the protruding portions 12 are formed by punching as described later, so the size of the plurality of protruding portions 12 becomes uniform, and the interval between the plurality of fins 11 Become consistent.

In addition, in the heat sink 10, the convex portion 121b and the concave portion 122b are fitted in a state where one side parallel portion 121a and the other side parallel portion 122a of the adjacent protruding portion 12 are in contact. Thus, it is difficult for the plurality of fins 11 to shift from each other in the longitudinal direction (left-right direction) of the fins 11.

The protruding portion 12 is provided at a substantially central portion in the width direction of the fin 11 in the up-down direction.

The connecting portion 13 is L-shaped, and has a first connecting portion 131 connected to the fin 11 and a second connecting portion 132 connected to the protruding portion 12. The first connection portion 131 is connected to the substantially central portion of the fin 11 in the width direction. The second connection portion 132 is bent at 90 degrees. As a result, the surface of the fin 11 and the surface of the protrusion 12 are at 90 degrees.

In addition, the material of the heat sink 10 can be exemplified by an aluminum material such as aluminum or aluminum alloy. In addition, the material of the heat sink 10 may be a composite material of copper, aluminum, or aluminum alloy and carbon. Alternatively, the portion of the fin 11 may be an aluminum-carbon composite material, and the protruding portion 12 and the connecting portion 13 may be aluminum materials.

In addition, the plate thickness of the heat sink 10 can be exemplified as 0.3 to 1.2 mm. It can be appropriately changed according to the size of the entire liquid-cooled cooling device 1, the type of cooling fluid flowing through the housing 20, or the thermal conductivity of the fins 11.

In the heat sink 10, the upper ends of the plurality of fins 11 are brazed to the surface (lower surface) of the top 21a of the case body 21 opposite to the surface on which the heating element P is mounted, and the lower ends of the plurality of fins 11 The portion is brazed to the upper surface of the cover 22 and fixed in the housing 20. It can be exemplified that when brazing, the upper ends of the plurality of fins 11 are brazed to the case body 21, the lower ends of the plurality of fins 11 are brazed to the cover 22, and the case body 21 and the cover 22 are hard Welding is performed simultaneously.

In the liquid-cooled cooling device 1 configured as described above, the cooling liquid flows into the inflow-side space 23 in the housing 20 through the interior of the inlet joint 30 and the inlet through-hole 21d. Then, in the radiator 10, the inter-fin flow path 14 formed by the gap between the fins 11 adjacent to each other among the plurality of fins 11 flows to the left, and reaches the outflow side space 24. In addition, the front side flow path 15 formed between the front-most fin 11 in the radiator 10 and the side portion 21 b of the case body 21 and the rear-most fin 11 in the radiator 10 and the case body The rear side flow path 16 formed by the gap between the side portions 21b of 21 flows in the left direction and reaches the outflow side space 24. The cooling liquid that has reached the outflow side space 24 flows out of the housing 20 through the inside of the outlet through-hole 21e and the outlet joint 40.

The heat generated by the heating element P is cooled by the insulating member I, the top portion 21a of the case body 21 and the fins 11 of the radiator 10 into the inter-fin flow path 14, the front side flow path 15 and the rear side flow path 16 Liquid cooling. As a result, the heating element P is cooled.

(Manufacturing method of radiator 10)

4 and 5 are diagrams for explaining the manufacturing method of the heat sink 10.

In the manufacturing method of the present embodiment, the bent piece 17 is temporarily formed, and the bent piece connects one fin 11, the protruding portion 12 and the connecting portion 13 protruding outward from the one fin 11, and the one fin 11 Adjacent other fins 11, the protruding portion 12 protruding outward from the other fins 11 and the connecting portion 13 are connected. Both ends of the bending piece 17 are connected to the adjacent protruding portions 12 respectively, and a bending portion 171 is bent at the central portion of the bending piece 17.

Then, by cutting the bent piece 17, the heat sink 10 composed of the plurality of fins 11, the protruding portion 12 and the connecting portion 13 is taken out.

More specifically, as shown in FIG. 4, first, the periphery of the plurality of fins 11, the protruding portions 12, and the connecting portions 13 is punched out by punching the plate M made of aluminum material (first step ). At this time, a rectangular shape is punched out so that the longitudinal direction of the fin 11 becomes the width direction of the sheet material M and the width direction of the fin 11 becomes the longitudinal direction of the sheet material M. It can be exemplified that when the thickness of the plate material M is, for example, 0.3 to 1.2 mm, the size of the fin 11 in the width direction is 3 to 12 mm. In addition, FIG. 4 shows an example in which three fins 11, protruding portions 12, and connecting portions 13 are punched out in the first step, but the number is not particularly limited to three.

In addition, by pressing the sheet material M, a portion inside the bending piece 17, that is, a portion between the bending piece 17 and the protruding portion 12 is punched out (second step). In addition, in FIG. 4, it is exemplified that the inside of at least two bending pieces 17 provided between the three protruding portions 12 generated in the first step is punched out in the second step. In this way, in the second step, the punching range can be set according to the number of protrusions 12 formed in the first step.

In addition, the order of the first step and the second step, and the timing of the first step and the second step are not particularly limited.

Then, the fin 11 is rotated so that the angle of the surface of the fin 11 formed in the first step becomes an angle that intersects the plate surface of the plate M (third step). In the third step, by bending the end of the second connecting portion 132 of the connecting portion 13 on the side of the protruding portion 12 with respect to the protruding portion 12 The portion of the fin 11 and the connection portion 13 on the side of the fin 11 (the first connection portion 131) is rotated to an angle that intersects the plate surface of the plate M, in other words, the protrusion 12. At this time, the end of the second connecting portion 132 of the connecting portion 13 on the side of the protruding portion 12 may be bent while pressing the protruding portion 12. Accordingly, it is not necessary to apply force to the fins 11, so that deformation of the fins 11 can be suppressed. In addition, in the present embodiment, it can be exemplified that the fin 11 is rotated 90 degrees with respect to the plate material M.

In addition, the order of the second step and the third step, and the timing of the second step and the third step are not particularly limited.

Then, by punching the sheet material M, the outer portion of the folded piece 17 is punched out (fourth step). As a result, the surroundings of the plurality of fins 11, the plurality of protruding portions 12, the plurality of connecting portions 13, and the plurality of bending pieces 17 are punched out.

Then, the bent portion 171 of the bent piece 17 is further bent to bring the adjacent protruding portions 12 into contact with each other (fifth step). In the fifth step, one side parallel portion 121a of one protruding portion 12 is brought into contact with the other side parallel portion 122a of the protruding portion 12 disposed on the front side of the one protruding portion 12 (see FIG. 3(b)). In addition, the other parallel portion 122a of the one protruding portion 12 is brought into contact with the one parallel portion 121a of the protruding portion 12 disposed on the rear side of the one protruding portion 12 (see FIG. 3(b)). At this time, the bent portion 171 is bent so that the convex portion 121b and the concave portion 122b are fitted in a state where the one-side parallel portion 121a and the other-side parallel portion 122a are in contact. With this fifth step, the interval between adjacent fins 11 is shortened, and the interval becomes a predetermined size (the size between the one-side parallel portion 121a and the other-side parallel portion 122a of the protruding portion 12).

In addition, in the fifth step, the bending portion 171 of the bending piece 17 can be made by applying force to the protrusion 12 in a direction parallel to the surface of the protrusion 12 (direction orthogonal to the surface of the fin 11) Bend. Thus, there is no need to apply force to the fins 11, so the deformation of the fins 11 is suppressed.

Then, when the number of fins 11 at a predetermined interval becomes a predetermined number (hereinafter, sometimes referred to as "predetermined number"), the predetermined number of fins 11 and the predetermined number slices The protruding portion 12, the connecting portion 13, and the bent piece 17 of the protruding fin 11 are cut out (sixth step). When cutting off, cut off the protruding portion 12 and the connecting portion 13 protruding from the predetermined number of fins 11 and the protruding portion 12 and the connecting portion protruding from the (predetermined number of +1) fins 11 13连接的折片片17。 13 Attached bending sheet 17. The position where the bending piece 17 is cut is not particularly limited, but it can be exemplified as a connection portion of the bending piece 17 and the protruding portion 12 or a bending portion 171, for example.

Then, the adjacent protruding portions 12 are welded or adhered to each other in a state where they are in contact with each other (the seventh step). As a method of adhering the protrusions 12 to each other, application of an adhesive to the protrusions 12 can be exemplified. In addition, as a method of welding the protruding portions 12 to each other, laser welding or ultrasonic welding can be exemplified for the protruding portions 12.

After the protruding portions 12 are joined to each other in the seventh step, the bent piece 17 is cut (eighth step). In this eighth step, it can be exemplified that the tip portion of the bending piece 17 is bent upward or downward with respect to the protrusion 12 in a state where the protrusion 12 is pressed (applying force in the width direction of the fin 11), thereby The connection between the bent piece 17 and the protruding portion 12 is broken.

FIG. 6 is a perspective view showing a state where the projections 12 are welded by laser welding.

As shown in FIG. 6, the laser light L is irradiated from the laser head 151 of the laser device 150 toward a portion where the convex portion 121 b and the concave portion 122 b fit in the portion where the adjacent protruding portions 12 are in contact with each other. Then, the laser light L is continuously irradiated by moving the laser head 151 in the arrangement direction of the plurality of fins 11 (the arrangement direction of the plurality of protrusions 12 ), in other words, the direction orthogonal to the surface of the fin 11.

In addition, the laser source of the laser device 150 is not particularly limited. Examples include YAG lasers, CO ₂ lasers, fiber lasers, disk lasers, and semiconductor lasers. In addition, the irradiation direction of the laser light L may be a direction orthogonal to the surface of the protruding portion 12 or a direction inclined with respect to the orthogonal direction.

According to the heat sink 10 manufactured by the manufacturing method described above, the interval between the plurality of fins 11 can be made uniform. In other words, the distance between the parallel part 121a on one side and the parallel part 122a on the other side of the protruding part 12 protruding outward from one fin 11 is determined between the adjacent fins 11 The shape of the protruding portion 12 is formed by punching by punching. In addition, the size in the case of forming by punching with punching is easier to be the desired size (the size of the design drawing) than in the case of forming by plastic deformation by bending, for example. Therefore, according to the heat sink 10 manufactured by the above manufacturing method, the interval between the plurality of fins 11 can be made uniform.

In addition, according to the above-described manufacturing method, by bending the bent portion 171 of the bent piece 17 to bring the adjacent protruding portions 12 into contact with each other, the interval between the fins 11 is determined. That is, by applying a force in a direction parallel to the surface of the protruding portion 12 to the protruding portion 12 and contacting the adjacent protruding portion 12, the interval between the fins 11 is determined. Therefore, the interval between the fins 11 can be easily determined.

In addition, in the seventh step of welding or adhering the protruding portions 12 to join them, it is possible to maintain (constrain) the plurality of fins by applying a force in a direction parallel to the surface of the protruding portions 12 to the protruding portions 12 The pieces 11 are arranged at a predetermined interval, so that they can be joined with a high accuracy at a predetermined interval.

In addition, by forming the convex portions 121b and the concave portions 122b of the adjacent protruding portions 12 to be fitted, even if the protruding portions 12 are forced to contact each other, the protruding portions 12 are forced to press in a direction parallel to the surface of the protruding portions 12 , The fin 11 can also be prevented from shifting in the longitudinal direction. Therefore, the plurality of fins 11 are easily arranged straight.

FIG. 7 is an enlarged view of the bending piece 17.

A cutout 172 recessed from the inner surface may be formed in the bent portion 171 of the bent piece 17. Thereby, it is easy to bend the bent portion 171 to bring the adjacent protruding portions 12 into contact with each other. In addition, a cutout 173 that is recessed from the inner surface may be formed at each connection portion of the both ends of the bent piece 17 to the protruding portion 12. Thus, when the bent piece 17 is cut out from the protruding portion 12, it is easy to cut out.

(The role/effect of radiator 10)

According to the heat sink 10 manufactured by the above manufacturing method, there is a high possibility that the intervals between the plurality of fins 11 are uniform. That is, according to the shape of the heat sink 10 described above, the shape is formed by punching by punching The formed protrusions 12 are in contact with each other to determine the interval between the fins 11, so the interval between the plurality of fins 11 tends to become uniform. As a result, according to the heat sink 10, the heat generated from the heat generating body P is uniformly radiated, and the heat generating body P is uniformly cooled.

In addition, in the radiator 10, it is considered that the protruding portion 12 may interfere with the flow of the coolant from the inflow side space 23 to the outflow side space 24 through the inter-fin flow path 14, the front flow path 15, and the rear flow path 16. However, the width of the fins 11 in the protrusion 12 is the same as the thickness of the plate M (for example, 0.3 to 1.2 mm), which is much smaller than the width of the fins 11 (as an example , Which is approximately 10%), making it difficult to become an obstacle.

(Modification of manufacturing method of radiator 10)

In the manufacturing method described with reference to FIGS. 4 and 5, the bent piece 17 is temporarily formed, and the bent piece 17 protrudes outward from one fin 11 and the connecting portion 13 and the one fin The protruding portion 12 protruding outward from the other fins 11 adjacent to the sheet 11 is connected to the connecting portion 13, and after the adjacent protruding portions 12 are joined to each other, the bent piece 17 is cut. However, the manufacturing method of the heat sink 10 is not limited to this method. For example, by punching the sheet material M, the periphery of the fins 11, the protruding portions 12, and the connecting portions 13 are punched out, and the fins 11 are rotated so that the angle of the surface of the fins 11 intersects the surface of the protruding portions 12 Angle (for example, 90 degrees), thereby forming a single fin member (not shown) composed of one fin 11, the protruding portion 12, and the connecting portion 13. Then, after a plurality of single fin members are combined in such a manner that adjacent protrusions 12 contact each other, the protrusions 12 may be welded or adhered to each other to be joined.

Even with the heat sink 10 manufactured in this way, since the protrusions 12 formed by punching by punching are brought into contact with each other to determine the interval between the fins 11, the interval between the plurality of fins 11 is likely to change Be consistent. As a result, according to the heat sink 10, the heat generated from the heat generating body P is uniformly radiated, and the heat generating body P is uniformly cooled.

(Modification of protrusion 12)

FIG. 8 is a diagram showing a modification of the protruding portion 12.

The protruding portion 12 described above has a convex portion 121b at one end 121 and a concave portion 122b at the other end 122, but it may not have the convex portion 121b and the concave portion 122b as shown in FIG. 8. Even with this configuration, since the protrusions 12 formed by punching by punching are brought into contact with each other to determine the interval between the fins 11, the interval between the plurality of fins 11 is likely to become uniform.

<Second embodiment>

FIG. 9 is a schematic configuration diagram of the heat sink 200 of the second embodiment.

The heat sink 200 of the second embodiment is different from the heat sink 10 of the first embodiment in that the protrusion 212 corresponding to the protrusion 12 is different. In the following, differences from the heat sink 10 will be described. Components having the same functions in the second embodiment and the first embodiment are given the same symbols and their detailed descriptions are omitted.

The heat sink 200 of the second embodiment has a plurality of fins 211, a plurality of protrusions 212 provided outside each of the plurality of fins 211, and a connection portion 213 connecting the fins 211 and the protrusions 212.

Compared with the protruding portion 12 of the heat sink 10 of the first embodiment, the position of the protruding portion 212 with respect to the fin 211 is different. The protrusion 212 is provided at the lowermost end of the fin 211 in the width direction. In addition, the lower surface of the protrusion 212 and the lower end surface of the fin 211 are provided at the same height.

The connecting portion 213 is L-shaped, and has a first connecting portion 231 connected to the fin 211 and a second connecting portion 232 connected to the protruding portion 212. The first connection portion 231 is connected to an end portion of the fin 211 in the longitudinal direction, and is bent 90 degrees. The second connection portion 232 is provided on the same plane as the protruding portion 212.

In addition, since the connecting portion 213 is connected to the longitudinal end of the fin 211 and bent at 90 degrees, a notch 211 a is formed around the portion of the fin 211 where the connecting portion 213 is connected. Thereby, the side of the connecting portion 213 connected to the fin 211 is easily bent with respect to the protruding portion 212, so that the surface of the fin 211 and the surface of the protruding portion 212 are easily formed at 90 degrees.

In the heat sink 200 configured in this manner, the protrusions 212 formed by punching and punching are in contact with each other to determine the interval between the fins 211, so the interval between the plurality of fins 211 is easy Become consistent. As a result, according to the heat sink 200, the heat generated from the heat generating body P is uniformly radiated, and the heat generating body P is uniformly cooled.

In addition, in the heat sink 200, since the protruding portion 212 is provided at the lowermost end portion in the width direction of the fin 211, it is difficult to hinder the flow of the cooling liquid from the inflow side space 23 to the outflow side space 24.

The heat sink 200 is the same as the heat sink 10 of the first embodiment, by brazing the upper ends of the plurality of fins 211 to the top 21a of the case body 21 and brazing the lower ends of the plurality of fins 211 to the cover 22 is fixed on the upper surface of the housing 20. As described above, the timing of the brazing of the plurality of fins 211 and the case body 21, the brazing of the plurality of fins 211 and the cover 22, and the brazing of the case body 21 and the cover 22 are not particularly limited.

FIG. 10 is a diagram showing a state where the heat sink 200 and the cover 22 are joined.

In the heat sink 200, the protruding portion 212 is provided at the lowermost end portion in the width direction of the fin 211, and the lower surface of the protruding portion 212 and the lower end surface of the fin 211 have the same height. Therefore, when the plurality of fins 211 and the cover 22 are brazed, the lower surface of the protrusion 212 and the cover 22 are welded. Therefore, according to the heat sink 200, by welding or adhering the heat sink 200 and the cover 22, the positions of the heat sink 200 and the cover 22 are accurately determined.

In addition, the method of joining the heat sink 200 and the cover 22 is not limited to brazing. For example, it may be fusion bonding other than compression bonding, bonding, or brazing.

<Third Embodiment>

FIG. 11 is a schematic configuration diagram of the heat sink 300 of the third embodiment.

The heat sink 300 of the third embodiment is different from the heat sink 200 of the second embodiment in that the connecting portion 313 corresponding to the connecting portion 213 is different. Hereinafter, points different from the heat sink 200 will be described. Yes In the third embodiment and the second embodiment, members having the same function are given the same symbols and their detailed descriptions are omitted.

The heat sink 300 of the third embodiment has a plurality of fins 311, a plurality of protrusions 312 provided outside each of the plurality of fins 311, and a connection portion 313 connecting the fins 311 and the protrusions 312.

The connecting portion 313 is provided at the lowermost end in the width direction of the fin 211 so that the lower surface of the protruding portion 312 and the lower end surface of the fin 311 are the same height as the protruding portion 212 of the heat sink 200 of the second embodiment. unit. In addition, similar to the connection portion 13 of the heat sink 10 of the first embodiment, the connection portion 313 has a first connection portion 331 connected to a portion in the width direction of the fin 311 and a second connection connected to the protruding portion 312 Part 332 is L-shaped. The second connection portion 332 is bent at 90 degrees. Thus, the surface of the fin 311 and the surface of the protrusion 312 become 90 degrees.

Also in the heat sink 300 configured in this manner, the interval between the fins 311 is determined by contacting the protrusions 312 formed by punching and punching with each other, so the interval between the plurality of fins 311 is easy Become consistent. As a result, according to the heat sink 300, the heat generated from the heat generating body P is uniformly radiated, and the heat generating body P is uniformly cooled.

In addition, in the heat sink 300, since the protruding portion 312 is provided at the lowermost end portion in the width direction of the fin 311, it is difficult to hinder the flow of the cooling liquid from the inflow side space 23 to the outflow side space 24.

In addition, by welding or adhering the heat sink 300 and the cover 22, the positions of the heat sink 300 and the cover 22 are accurately determined.

<Fourth embodiment>

In the above-described heat sink 10 of the first embodiment, the heat sink 200 of the second embodiment, and the heat sink 300 of the third embodiment, a semicircular convex portion 121b is formed on one end 121 and on the other side The end 122 forms a semi-circular recess 122b. And by fitting the convex part 121b and the concave part 122b, The deviation of the fins 11, 211, 311 in the longitudinal direction is suppressed. However, the shapes of the convex portion 121b and the concave portion 122b are not limited to semicircular shapes.

FIG. 12 is a schematic configuration diagram of a heat sink 400 of the fourth embodiment.

The heat sink 400 of the fourth embodiment is different from the heat sink 200 of the second embodiment in that the protrusion 412 corresponding to the protrusion 212 is different. Hereinafter, points different from the heat sink 200 will be described.

The heat sink 400 of the fourth embodiment has a plurality of fins 411, a plurality of protruding portions 412 provided outside each of the plurality of fins 411, and a connecting portion 413 connecting the fins 411 and the protruding portions 412. The fins 411 and the connecting portion 413 are the same as the fins 211 and the connecting portion 213 of the second embodiment, respectively, so detailed description is omitted.

The end portion 421 on the one side in the arrangement direction of the protruding portion 412 has a side parallel portion 421a parallel to the plate surface of the fin 411 and a convex portion 421b protruding from the side parallel portion 421a. In addition, the other end 422 in the arrangement direction of the protruding portions 412 has another parallel portion 422 a parallel to the plate surface of the fin 411 and a concave portion 422 b recessed from the other parallel portion 422 a. The convex portion 421b protrudes in a 1/4 arc shape, and the concave portion 422b is concave in a 1/4 arc shape.

In the protruding portion 412 configured as described above, one side parallel portion 421 a of the one protruding portion 412 is in contact with the other side parallel portion 422 a of the protruding portion 412 disposed on the front side of the one protruding portion 412. In addition, the other parallel portion 422 a of the one protruding portion 412 is in contact with the one parallel portion 421 a of the protruding portion 412 disposed on the rear side of the one protruding portion 412. In addition, when the sizes of the plurality of protrusions 412 are the same, the intervals between the plurality of fins 211 become the same.

In addition, in the heat sink 400, the convex portion 421b and the concave portion 422b are fitted in a state where one side parallel portion 421a and the other side parallel portion 422a of the adjacent protruding portion 412 are in contact. In addition, in this structure, the left side protruding portion 12 l and the right side protruding portion 12 r protruding outward from the both ends in the longitudinal direction of the fin 211 are bilaterally symmetrical. Therefore, the concave portions 422b of the protruding portions 412 protruding from the left and right ends of one fin 411 are separated from the left and right ends of the fin 411 after being arranged on the one fin 11, respectively. The convex portions 421b of the protruding portions 412 each protruding are pressed inward. As a result, it is difficult for the plurality of fins 411 to shift from each other in the longitudinal direction (left-right direction) of the fins 411.

The heat sink 400 configured in this way can be manufactured by the manufacturing method described using FIGS. 4 and 5. Alternatively, after forming a single fin member (not shown) composed of one fin 411, protrusion 412, and connecting portion 413, a plurality of single fin members may be combined into adjacent protrusions 412 The convex portions 421b and the concave portions 422b are in contact with each other, and then the protruding portions 412 are welded or adhered to each other to be joined.

In addition, the connection portion 413 of the heat sink 400 may be configured similarly to the connection portion 13 of the first embodiment and the connection portion 313 of the third embodiment. In addition, similar to the protruding portion 12 of the first embodiment, the protruding portion 412 may be provided at a substantially central portion in the width direction of the fin 411.

<Fifth Embodiment>

FIG. 13 is a schematic configuration diagram of a heat sink 500 of the fifth embodiment.

The heat sink 500 of the fifth embodiment is different from the heat sink 200 of the second embodiment in that the fin 511 corresponding to the fin 211 is different. Hereinafter, points different from the heat sink 200 will be described. Components having the same function in the fifth embodiment and the second embodiment are given the same symbols and their detailed descriptions are omitted.

The fins 211 of the second embodiment are linear in the longitudinal direction, while the fins 511 of the fifth embodiment have a wave shape in which the peaks and valleys are continuously formed in the longitudinal direction when viewed in the vertical direction (viewed in the front-rear direction) (The case when it is rectangular is the same as the fin 211). In this way, since the fin 511 has a wave shape, the surface area is increased as compared with the case of being linear, so that the heating element P can be further cooled.

In addition, in the manufacturing method described in FIGS. 4 and 5, by providing a step of forming the fin 511 into a wave shape after the first step or after the second step, the wave shape can be shaped with high accuracy.

In addition, the fins 11 of the first embodiment, the fins 311 of the third embodiment, and the fins 411 of the fourth embodiment may be formed in a wave shape in the same manner as the fins 511.

<Sixth Embodiment>

FIG. 14 is a schematic configuration diagram of a heat sink 600 of the sixth embodiment.

The heat sink 600 of the sixth embodiment is different from the heat sink 200 of the second embodiment in that the fin 611 corresponding to the fin 211 is different. Hereinafter, points different from the heat sink 200 will be described. Components having the same functions in the sixth embodiment and the second embodiment are given the same symbols and their detailed descriptions are omitted.

The fin 611 of the sixth embodiment has a rod-shaped base portion 611a extending in the left-right direction and a plurality of column-shaped columnar portions 611b protruding upward from the base portion 611a. The plurality of columnar portions 611b are arranged at predetermined intervals in the left-right direction. The shape of the columnar portion 611b when viewed in the up-down direction is a rhombus, and the length of the short diagonal line of the rhombus is larger than the thickness of the base portion 611a and the thickness of the plate M. In addition, the short diagonal lines in the columnar portions 611 b of the fins 611 provided adjacent to each other among the plurality of fins 611 are offset from each other in the left-right direction. For example, between adjacent columnar portions 611b and columnar portions 611b in one fin 611, columnar portions 611b of other fins 611 adjacent to the one fin 611 are arranged. In addition, the length of the diamond-shaped short diagonal of the columnar portion 611b may be the same as the thickness of the plate M.

In this way, the fins 611 have a plurality of rhombic columnar portions 611b, so that the cooling fluid flowing between the fins 611 contacts the columnar portions 611b everywhere, so that the heating element P can be further cooled.

In addition, in the manufacturing method described with reference to FIGS. 4 and 5, the step of forming a plurality of columnar portions 611b in the fins 611 after the first step or after the second step can be formed with high accuracy柱状部611b.

In addition, the fins 11 of the first embodiment, the fins 311 of the third embodiment, and the fins 411 of the fourth embodiment may have a plurality of columnar portions 611b similarly to the fins 611.

10‧‧‧ radiator

11‧‧‧fin

12‧‧‧Projection

12l‧‧‧Left protrusion

12r‧‧‧ Right protrusion

13‧‧‧ Connection

14‧‧‧ Flow path between fins

15‧‧‧Front flow path

16‧‧‧ Rear flow path

23‧‧‧Into the side space

24‧‧‧ Outflow side space

121、122‧‧‧End

121a‧‧‧One side parallel part

121b‧‧‧Convex

122a‧‧‧Parallel on the other side

122b‧‧‧recess

131‧‧‧First connection

132‧‧‧Second connection

Claims (9)

A radiator with: A plurality of fins arranged in a plate shape and arranged in a direction orthogonal to the plate surface; and A plurality of protrusions protruding outward from each of the aforementioned plurality of fins; The adjacent protrusions of the plurality of protrusions are in contact with each other in the arrangement direction of the plurality of fins. The radiator as described in item 1 of the patent application scope, in which The aforementioned fins are rectangular, The protruding portion protrudes outward from the longitudinal end of the fin. The radiator as described in item 1 or 2 of the patent application scope, wherein The protruding portion has a plate shape in which the arrangement direction of the plurality of fins is parallel to the plate surface. The radiator according to any one of the items 1 to 3 of the patent application scope, wherein The one end of the protruding portion in the arrangement direction has a side parallel portion parallel to the plate surface of the fin and a convex portion protruding from the one side parallel portion, and the other end has a The parallel part on the other side of the fin plate surface parallel and the concave part recessed from the parallel part on the other side; In a state where the one-side parallel portion of the adjacent protruding portion is in contact with the other-side parallel portion, the convex portion and the concave portion are fitted. The radiator according to any one of the items 1 to 4 of the patent application scope, wherein The aforementioned fins are rectangular; The protruding portion is provided at the central portion in the width direction of the fin. The radiator according to any one of the items 1 to 4 of the patent application scope, wherein The aforementioned fins are rectangular; The protruding portion is provided at one end in the width direction of the fin. The radiator according to any one of the items 1 to 6 of the patent application scope, wherein Adjacent protrusions are joined to each other by welding or bonding. A radiator with: A plurality of rectangular fins arranged in a plate shape and arranged in a direction orthogonal to the plate surface; and A plurality of protrusions protruding outward from the longitudinal ends of the plurality of fins; and Adjacent protrusions of the aforementioned plurality of protrusions are joined to each other by welding or adhesion. A cooling device has: The radiator mentioned in any of items 1 to 8 of the patent application scope; and A housing that houses the radiator and allows cooling fluid to flow between the fins of the radiator.

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