Radiator structure and manufacturing method thereof

Abstract

The present invention relates to a heat sink structure and a method for manufacturing the same, in which a plurality of heat-dissipating fin sections are fixed to a heat-dissipating surface of a heat sink main body section by laser welding, thereby minimizing the thickness and pitch of the plurality of heat-dissipating fin sections, improving heat-dissipating performance, and reducing weight, and in which only the heat sink main body section is manufactured by casting. Therefore, the time required for production and the manufacturing cost can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to a heat sink structure and a manufacturing method thereof, and more particularly to a heat sink structure in which a heat sink is joined to a heat sink body by laser welding and a manufacturing method thereof. Background Art

[0002] Usually, the radiator is installed on the product that needs heat dissipation to effectively dissipate heat.

[0003] The heat sink is applicable to various products in the electronics, machinery, and automobile industries such as LED lighting, semiconductor manufacturing equipment, computers, medical equipment, and radiation application equipment to prevent thermal damage and achieve stable operation, and can be deformed into various forms according to the products.

[0004] Generally, the radiator has a structure with a plurality of fins, which stand upright on the opposite side of the mounting surface in a radiator body having a mounting surface for mounting a product requiring heat dissipation. The heat generated by the product can be quickly dissipated through heat exchange between the fins and air.

[0005] Korean Patent Publication No. 10-0381303 (publication date: April 26, 2003; hereinafter referred to as “the prior art”) discloses a “porous heat sink”.

[0006] The heat sink in the prior art is manufactured by extrusion or casting, and has a structure in which a heat sink plate as the heat sink body and the plurality of heat sink fins are integrated.

[0007] However, the heat sink of the prior art is manufactured by extrusion or casting, and the heat sink plate and the plurality of heat sinks are formed as one body, and thus it is difficult to reduce the thickness and spacing of the plurality of heat sinks, resulting in a small number of the plurality of heat sinks, thus limiting the heat dissipation performance and making it difficult to reduce the weight.

[0008] In addition, the heat sink of the prior art is manufactured by extrusion or casting, so the design of the mold becomes complicated in order to form the multiple heat sinks, and the manufacturing cost required is high. In addition, the mold must be manufactured separately according to the shape of each product. Therefore, there are problems such as a long time required for mold design and manufacturing and a high defect rate during manufacturing. Summary of the invention

[0009] (Problem to be solved)

[0010] The technical problem of the present invention is to provide a heat sink structure and a manufacturing method thereof, wherein a heat sink main body and a plurality of heat sink fins are manufactured separately, and then the plurality of heat sink fins are fixed to the heat sink main body by laser welding, thereby minimizing the thickness and spacing of the plurality of heat sink fins, which can significantly reduce the manufacturing cost.

[0011] The technical problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art in the technical field to which the present invention belongs from the following description.

[0012] (Methods to solve the problem)

[0013] In order to achieve the above-mentioned problem, the heat sink structure according to the present invention is composed of a heat sink body and a plurality of heat sinks. A mounting surface is provided on one side of the heat sink body, and a product to be radiated is located on the mounting surface. A heat sink surface for heat dissipation is provided on the one side and the other side of the heat sink body. The plurality of heat sinks are erected on the heat sink surface of the heat sink body and fixed by laser welding.

[0014] A plurality of welding joints may be protrudingly formed on the heat dissipation surface of the heat sink main body, and the plurality of heat sinks may be respectively joined at the plurality of welding joints by laser welding.

[0015] The plurality of welding joints may be respectively constituted by a first heat sink support portion. The first heat sink support portion may be formed protrudingly on the heat dissipation surface. The lower end portion of each of the plurality of heat sink portions may stand upright on the heat dissipation surface at one side of the first heat sink support portion. The first heat sink support portion supports one side of each of the plurality of heat sink portions. One side of each of the plurality of heat sink portions and one side of the first heat sink support portion may be fixed by laser welding.

[0016] The plurality of welding joints may be respectively composed of a first heat sink support portion and a second heat sink support portion. The first heat sink support portion may be formed protrudingly on the heat sink surface, and the second heat sink support portion may be formed protrudingly on the heat sink surface at a distance from the first heat sink support portion. The lower end portion of each of the plurality of heat sink portions is inserted between the first heat sink support portion and the second heat sink support portion and may stand upright on the heat sink surface. The first heat sink support portion may support one side of each of the plurality of heat sink portions. The second heat sink support portion may support the other side of each of the plurality of heat sink portions. One of the positions between one side of each of the plurality of heat sink portions and one side of the first heat sink support portion and the other side of each of the plurality of heat sink portions and one side of the second heat sink support portion may be fixed by laser welding.

[0017] The plurality of welding joints may be respectively formed by support blocks. The support blocks may be formed protrudingly on the heat dissipation surface. The lower end of each of the plurality of heat sinks stands upright on the support blocks and may be fixed to the support blocks by laser welding.

[0018] The multiple welding joints may be respectively composed of a support block, a first heat sink support, and a second heat sink support. The support block may be formed protrudingly on the heat dissipation surface. The first heat sink support may be formed protrudingly on one end of the support block, and the second heat sink support may be formed protrudingly on the other end of the support block at intervals from the first heat sink support. The lower end of each of the multiple heat sinks is inserted between the first heat sink support and the second heat sink support and may stand upright on the support block. The first heat sink support may support one side of each of the multiple heat sinks. The second heat sink support may support the other side of each of the multiple heat sinks. One of the sides between one side of each of the multiple heat sinks and the first heat sink support and one side between the other side of each of the multiple heat sinks and the second heat sink support may be fixed by laser welding.

[0019] The first heat sink supporting portion may have a thickness that is 0.7 to 1.1 times greater than a thickness of each of the plurality of heat sink portions.

[0020] The height of the first heat sink supporting portion may be formed to be 1 to 2 times the thickness of each of the plurality of heat sink portions.

[0021] The second heat sink supporting portion may have a thickness that is 0.7 to 1.1 times greater than a thickness of each of the plurality of heat sink portions.

[0022] The height of the second heat sink supporting portion may be formed to be 1 to 2 times the thickness of each of the plurality of heat sink portions.

[0023] The thickness of the support block portion may be formed to be 2.4 to 3.3 times the thickness of each of the plurality of heat sink portions.

[0024] The plurality of fin portions may be respectively constituted by a plate support member and a fin member. The fin member may be disposed upright at least in part of both end portions of the plate support member.

[0025] The fin member may be composed of vertical fins. The vertical fins may be arranged at least in a part of both ends of the board support member and arranged perpendicular to the board support member.

[0026] The heat sink member may be composed of inclined pieces formed at both ends of the board support member. The inclined pieces formed at both ends of the board support member may be inclined so that the distance between them increases as they are farther from the board support member.

[0027] The heat sink member may further include vertical fins extending from ends of the inclined fins formed at both ends of the board support member and extending perpendicularly to the board support member.

[0028] In order to achieve the above-mentioned problem, the manufacturing method of the heat sink structure according to the present invention is composed of a preparation step and a laser welding step. In the preparation step, the heat sink main body and the plurality of heat sink fins are manufactured separately. The heat sink main body has a mounting surface on one side, and the product to be heat-dissipated is located on the mounting surface. The heat sink main body has a heat dissipation surface for heat dissipation on the one side and the other side. The plurality of heat sink fins play a role in heat dissipation; in the laser welding step, the plurality of heat sink fins can be fixed to the heat dissipation surface of the heat sink main body at intervals by laser welding.

[0029] In the preparation step, the heat sink main body may be manufactured by casting, and the plurality of heat sink fins may be manufactured by cutting a manufactured metal plate.

[0030] In the preparation step, a plurality of welding joints may be formed on the heat dissipation surface of the heat sink body. In the laser welding step, the plurality of heat sinks may be respectively joined to the plurality of welding joints by laser welding.

[0031] Specific items of other embodiments are included in the detailed description and drawings.

[0032] (Effects of the Invention)

[0033] The present invention manufactures a radiator body and a plurality of heat sinks separately, and then fixes the plurality of heat sinks to the radiator body by laser welding, thereby minimizing the thickness and spacing of the plurality of heat sinks, thereby improving heat dissipation performance and significantly reducing weight.

[0034] In addition, the present invention manufactures only the heat sink body by casting, thereby significantly reducing the time and manufacturing cost required for production.

[0035] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1FIG. 1 is a bottom perspective view showing an embodiment of a heat sink structure according to the present invention.

[0037] Figure 2 1 is a top perspective view showing an embodiment of a heat sink structure according to the present invention.

[0038] Figure 3 is a side view showing an embodiment of a heat sink structure according to the present invention.

[0039] Figure 4 and Figure 5 This is a diagram showing an enlarged portion of an embodiment of a heat sink structure according to the present invention.

[0040] Figure 6 This is a diagram showing an enlarged portion of another embodiment of the heat sink structure according to the present invention.

[0041] Figures 7 to 10 FIG. 1 is a diagram illustrating another shape of the fin portion in the heat sink structure according to the present invention.

[0042] Fig.11 This is a photograph of an image of a first test example of laser welding a fin portion in a heat sink manufacturing method according to the present invention.

[0043] Fig.12 This is a photograph of an image of a second test example of laser welding of a fin portion in the heat sink manufacturing method according to the present invention.

[0044] (Explanation of Reference Numerals)

[0045] 1: Radiator structure 100: Radiator main body

[0046] 101: Mounting surface 102: Heat dissipation surface

[0047] 107: welding joint 110: first heat sink supporting portion

[0048] 120: Second heat sink support portion 130: Support block portion

[0049] 200: Radiating fin 210: Board support member

[0050] 220: heat sink component 221: vertical sheet

[0051] 222: Tilt piece DETAILED DESCRIPTION

[0052] The present invention is susceptible to various changes and can have various embodiments, so specific embodiments will be illustrated in the drawings and described in detail.

[0053] However, it should be understood that this is not intended to limit specific embodiments, but rather includes all changes, equivalents and substitutes within the scope of the present invention. In the description of the present invention, if it is determined that the specific description of the related known technology may make the key points of the present invention unclear, the detailed description will be omitted.

[0054] When describing that a certain component is "connected" or "combined" to another component, it can be directly connected or in contact with the other component, but it can also be understood that there can be other components in between. On the contrary, when describing that a certain component is "directly connected" or "directly combined" to another component, it should be understood that there are no other components in between.

[0055] The terms used in this application are used only to illustrate specific examples and are not intended to limit the present invention. Unless otherwise expressly stated in the article, singular expressions include plural expressions. In this application, the terms "including" or "having" should be understood to specify the existence of features, numbers, steps, actions, components, parts or combinations thereof recorded in the specification, and do not exclude the existence or additional possibility of one or more other features or numbers, steps, actions, components, parts or combinations thereof in advance.

[0056] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Hereinafter, the same reference numerals are used for the components in the accompanying drawings, and repeated descriptions of the same components are omitted.

[0057] Figure 1 is a bottom perspective view showing an embodiment of a heat sink structure according to the present invention; Figure 2 is a top perspective view showing an embodiment of a heat sink structure according to the present invention; Figure 3 is a side view showing an embodiment of a heat sink structure according to the present invention; Figure 4 and Figure 5 This is a diagram showing an enlarged portion of an embodiment of a heat sink structure according to the present invention.

[0058] In more detail, Figure 4 1 is a diagram showing an example of combining the heat sink body 100 with the heat sink fin portion 200 before laser welding; Figure 5 1 is a diagram showing an example of fixing the heat sink 200 to the heat sink body 100 after laser welding.

[0059] refer to Figures 1 to 5 , an embodiment of the heat sink structure 1 according to the present invention is described in detail below.

[0060] An embodiment of the heat sink structure 1 according to the present invention comprises a heat sink body 100 , one side of the heat sink body 100 is provided with a mounting surface 101 , and a product to be radiated is located on the mounting surface 101 .

[0061] In this embodiment, a receiving space 105 for receiving the product may be formed on the mounting surface 101 of the heat sink body 100. However, the heat sink body 100 may be formed in a plate shape without the receiving space 105 formed therein.

[0062] The other side of the heat sink body 100 has a heat dissipation surface 102 , to which a plurality of heat dissipation fins 200 for dissipating heat through heat exchange are fixed.

[0063] For example, in the heat sink body 100 , the heat dissipation surface 102 may be the opposite side of the mounting surface 101 . In addition, according to the design of the product, the mounting surface 101 and another surface may also be used.

[0064] For example, the heat sink 200 has a straight panel shape. In addition, the heat sink 200 can also be manufactured into various shapes such as a curved panel shape or a strip shape.

[0065] For example, the heat sink body 100 and the heat sink fins 200 are made of aluminum or aluminum alloy. Alternatively, the heat sink body 100 and the heat sink fins 200 may be made of various other known materials having excellent thermal conductivity.

[0066] Then, the heat sink body 100 is manufactured into a designed shape by casting. For example, the heat sink 200 is manufactured by cutting a manufactured aluminum or aluminum alloy panel into a designed size.

[0067] The heat sink 200 is vertically mounted on the heat sink surface 102 of the heat sink body 100 , and is fixed to the heat sink surface 102 of the heat sink body 100 by laser welding while being mounted on the heat sink surface 102 of the heat sink body 100 .

[0068] Laser welding is a process in which, when the end of the heat sink portion 200 is mounted on the heat dissipation surface 102 of the heat sink main body 100, laser is irradiated toward the boundary line between the heat sink main body 100 and the heat sink portion 200, that is, at the corner where the lower end of the heat sink portion 200 meets the heat dissipation surface 102, and the heat sink portion 200 is fixed to the heat dissipation surface 102 of the heat sink main body 100 by welding.

[0069] The heat sink structure 1 according to the present invention is manufactured as follows: the heat sink body 100 is manufactured by casting, the heat sink fins 200 are manufactured separately from the heat sink body 100 , and the heat sink fins 200 are fixed to the heat sink body 100 by laser welding.

[0070] On the other hand, a plurality of welding joints 107 may be protruded and formed on the heat dissipation surface 102 of the heat sink body 100 , and the plurality of welding joints 107 are respectively connected to the plurality of heat dissipation fins 200 by laser welding.

[0071] The plurality of welding joints 107 are respectively formed by the first heat sink supporting portion 110 , the second heat sink supporting portion 120 and the supporting block portion 130 .

[0072] However, the plurality of welding joints 107 may be formed by only the first heat sink supporting portion 110 , only the first heat sink supporting portion 110 and the second heat sink supporting portion 120 , or only the supporting block portion 130 .

[0073] When the plurality of welding joints 107 are formed by the first heat sink supporting part 110, the second heat sink supporting part 120 and the supporting block part 130, respectively, the supporting block part 130 may be formed protrudingly on the heat dissipation surface 102, and the first heat sink supporting part 110 and the second heat sink supporting part 120 may be formed protrudingly on both ends of the supporting block part 130 at intervals from each other. That is, the first heat sink supporting part 110 may be formed protrudingly on one end of the supporting block part 130, and the second heat sink supporting part 120 may be formed protrudingly on the other end of the supporting block part 130 at intervals from the first heat sink supporting part 110. In this case, the lower end of each of the plurality of heat sink parts 200 is inserted between the first heat sink supporting part 110 and the second heat sink supporting part 120 and stands on the supporting block part 130, so that the first heat sink supporting part 110 may support one side of each of the plurality of heat sink parts 200, and the second heat sink supporting part 120 may support the other side of each of the plurality of heat sink parts 200. Then, one of one side of each of the plurality of fin parts 200 and one side of the first fin supporting part 110 and one side of each of the plurality of fin parts 200 and one side of the second fin supporting part 120 may be fixed by laser welding.

[0074] When the plurality of welding joints 107 are formed by only the first heat sink supporting part 110, the first heat sink supporting part 110 may be formed to protrude on the heat dissipation surface 102. In this case, the lower end of each of the plurality of heat sink parts 200 stands upright on the heat dissipation surface 102 on one side of the first heat sink supporting part 110, and the first heat sink supporting part 110 may support one side of each of the plurality of heat sink parts 200. Then, one side of each of the plurality of heat sink parts 200 and one side of the first heat sink supporting part 110 may be fixed by laser welding.

[0075] When the plurality of welding joints 107 are formed by only the first heat sink supporting portion 110 and the second heat sink supporting portion 120, the first heat sink supporting portion 110 and the second heat sink supporting portion 120 may be formed protrudingly on the heat sink surface 102 at intervals from each other. That is, the first heat sink supporting portion 110 may be formed protrudingly on the heat sink surface 102, and the second heat sink supporting portion 120 may be formed protrudingly on the heat sink surface 102 at intervals from the first heat sink supporting portion 110. In this case, the lower end of each of the plurality of heat sink portions 200 is inserted between the first heat sink supporting portion 110 and the second heat sink supporting portion 120 and stands upright on the heat sink surface 102, so that the first heat sink supporting portion 110 may support one side of each of the plurality of heat sink portions 200, and the second heat sink supporting portion 120 may support the other side of each of the plurality of heat sink portions 200. Then, one of one side of each of the plurality of fin parts 200 and one side of the first fin supporting part 110 and one side of each of the plurality of fin parts 200 and one side of the second fin supporting part 120 may be fixed by laser welding.

[0076] In the case where the plurality of welding joints 107 are respectively formed by only the support block 130, the support block 130 may be formed protrudingly on the heat dissipation surface 102. In this case, the lower end of each of the plurality of heat sinks 200 may stand on the support block 130. Then, the lower end of each of the plurality of heat sinks 200 may be fixed to the support block 130 by laser welding.

[0077] In the case where the plurality of solder joints 107 respectively include the support block portion 130 , the support block portion 130 may be formed to protrude from the heat dissipation surface 102 of the heat sink body 100 .

[0078] When the plurality of welding joints 107 do not include the supporting block portion 130 , the first heat sink supporting portion 110 is protruded from the heat dissipation surface 102 of the heat sink main body 100 , or the first heat sink supporting portion 110 and the second heat sink supporting portion 120 may be protruded from the heat dissipation surface 102 of the heat sink main body 100 .

[0079] In the case where the plurality of solder joints 107 include the first heat sink supporting portion 110 and the second heat sink supporting portion 120 , respectively, one end portion of each of the plurality of heat sink portions 200 may be inserted between the first heat sink supporting portion 110 and the second heat sink supporting portion 120 .

[0080] The first heat sink supporting portion 110 and the second heat sink supporting portion 120 are spaced at the same distance or slightly larger than the thickness t1 of the heat sink portion 200 , so that the heat sink portion 200 is close to and inserted between the first heat sink supporting portion 110 and the second heat sink supporting portion 120 .

[0081] For example, the first heat sink support portion 110 and the second heat sink support portion 120 are spaced apart by a distance of 1 to 1.2 times the thickness t1 of the heat sink portion 200 , and the heat sink portion 200 is inserted between the first heat sink support portion 110 and the second heat sink support portion 120 .

[0082] Then, for example, the thickness t2 of the first fin support portion 110 and the thickness t3 of the second fin support portion 120 are the same as or slightly larger than the thickness t1 of each of the plurality of fin portions 200. More specifically, for example, the thickness t2 of the first fin support portion 110 and the thickness t3 of the second fin support portion 120 are formed to be 0.7 to 1.1 times the thickness t1 of the fin portion 200.

[0083] The first heat sink support part 110 and the second heat sink support part 120 support both sides of the heat sink part 200 fixed by laser welding, play a role in reinforcing the fixing force of the heat sink part 200 and melt the executable solder during laser welding.

[0084] One side of the first heat sink support part 110 and the second heat sink support part 120 is melted during laser welding to act as a solder. In this case, if the thickness t2 of the first heat sink support part 110 and the thickness t3 of the second heat sink support part 120 are greater than 1.1 times the thickness t1 of each of the plurality of heat sink parts 200, it is difficult to act as a solder during laser welding. If the thickness t2 of the first heat sink support part 110 and the thickness t3 of the second heat sink support part 120 are less than 0.7 times the thickness t1 of each of the plurality of heat sink parts 200, the rigidity of the support heat sink part 200, that is, the rigidity of the opposite side to the welding part is insufficient. Therefore, it is preferred that the thickness t2 of the first heat sink support part 110 and the thickness t3 of the second heat sink support part 120 are formed to be 0.7 to 1.1 times the thickness t1 of each of the plurality of heat sink parts 200.

[0085] In addition, the height h of the first fin support portion 110 and the height h of the second fin support portion 120 may be formed to be 1 to 2 times the thickness t1 of each of the plurality of fin portions 200 .

[0086] When the height h of the first heat sink support part 110 and the height h of the second heat sink support part 120 are less than the thickness t1 of each of the plurality of heat sink parts 200, the rigidity of the two side surfaces supporting the heat sink part 200 may be insufficient; when the height h of the first heat sink support part 110 and the height h of the second heat sink support part 120 are greater than twice the thickness t1 of each of the plurality of heat sink parts 200, it may become a factor that reduces the heat dissipation effect. Therefore, it is preferred that the height h of the first heat sink support part 110 and the height h of the second heat sink support part 120 are formed to be 1 to 2 times the thickness t1 of each of the plurality of heat sink parts 200.

[0087] The thickness t4 of the support block portion 130 is formed to be 2.4 to 3.3 times the thickness t1 of the heat sink portion 200 . This is the thickness that can stably form the first heat sink support portion 110 and the second heat sink support portion 120 at the end side so as not to affect the spacing of the heat sink portion 200 .

[0088] That is, when the thickness t4 of the support block 130 is greater than 3.3 times the thickness t1 of each of the plurality of fins 200, the number of fins 200 provided on the heat sink body 100 is small, thereby reducing the heat dissipation performance; when the thickness t4 of the support block 130 is less than 2.4 times the thickness t1 of each of the plurality of fins 200, there is a problem that the thickness of the first fin support 110 and the second fin support 120 cannot be formed sufficiently. Therefore, it is preferred that the thickness t4 of the support block 130 is formed to be 2.4 to 3.3 times the thickness t1 of each of the plurality of fins 200.

[0089] The support block portion 130 is such that the heat sink portion 200 is spaced apart on the heat dissipation surface 102 of the radiator body 100. The support block portion 130 positions the laser welding portion on the heat dissipation surface 102 of the radiator body 100 at a height above a designed height, and after laser welding, the mounting surface 101 of the radiator body 100 can be prevented from bending due to the heat.

[0090] During laser welding, any one of the first heat sink support portion 110 and the second heat sink support portion 120 acts as a solder that melts together with the heat sink portion 200. After laser welding, the heat sink portion 200 is fixed between the first heat sink support portion 110 and the second heat sink support portion 120 by laser welding.

[0091] The heat sink portion 200 is inserted between the first heat sink support portion 110 and the second heat sink support portion 120 and then laser welded on either side of the first heat sink support portion 110 and the second heat sink support portion 120 , so that the heat sink portion 200 is firmly fixed between the first heat sink support portion 110 and the second heat sink support portion 120 .

[0092] The heat sink 200 is supported by the first heat sink support part 110 and the second heat sink support part 120 after laser welding, and the rigidity of both side surfaces is fully enhanced. Therefore, the heat sink 200 can be firmly fixed on the heat dissipation surface 102 of the heat sink body 100 .

[0093] Figure 6 This is a diagram showing an enlarged portion of another embodiment of the heat sink structure according to the present invention.

[0094] Reference Figure 6 The heat sink structure 1 according to the present invention may include a first heat sink supporting portion 110 that protrudes from the heat dissipation surface of the heat sink body portion 100 to support one side of the heat sink portion 200 .

[0095] In one example, the thickness of the first fin support portion 110 is the same as or smaller than the thickness of the fin portion 200. In more detail, in one example, the thickness of the first fin support portion 110 is formed to be 0.7 to 1.1 times the thickness of the fin portion 200.

[0096] During laser welding, laser light is irradiated between the first fin support portion 110 and the fin portion 200 in an oblique direction.

[0097] Then, the first heat sink support part 110 supports one side of the heat sink part 200 fixed by laser welding, plays a role of reinforcing the fixing force of the heat sink part 200 and melts the executable solder during laser welding.

[0098] The first heat sink support part 110 melts during laser welding and acts as a solder. In this case, if the thickness of the first heat sink support part 110 is greater than 1.1 times the thickness of each of the plurality of heat sink parts 200, it is difficult to act as a solder during laser welding. If the thickness of the first heat sink support part 110 is less than 0.7 times the thickness of each of the plurality of heat sink parts 200, the rigidity of supporting the heat sink part 200, that is, the rigidity of the opposite side of the welding part is insufficient. Therefore, it is preferred that the thickness t2 of the first heat sink support part 110 is formed to be greater than 0.7 to 1.1 times the thickness t1 of each of the plurality of heat sink parts 200.

[0099] In addition, the height of the first heat sink supporting portion 110 may be formed to be 1 to 2 times the thickness of each of the plurality of heat sink portions 200 .

[0100] When the height of the first heat sink support portion 110 is less than the thickness of each of the plurality of heat sink portions 200, the rigidity of the two side surfaces supporting the heat sink portion 200 may be insufficient; when the height of the first heat sink support portion 110 is greater than twice the thickness of each of the plurality of heat sink portions 200, it may become a factor that reduces the heat dissipation effect. Therefore, it is preferred that the height h of the first heat sink support portion 110 is formed to be 1 to 2 times the thickness t1 of each of the plurality of heat sink portions 200.

[0101] Figures 7 to 10 FIG. 2 is a diagram illustrating another shape of the fin portion 200 in the heat sink structure according to the present invention.

[0102] In more detail, Figure 7 (a) is a diagram showing an example of a heat sink portion 200 manufactured in the shape of the English letter "U"; Figure 7 (b) is an example of Figure 7 (a) is a three-dimensional view of a heat sink structure in which a heat sink fin portion 200 in the shape of the English letter “U” is fixed to a heat sink body portion 100 by laser welding.

[0103] in addition, Figure 8 (a) is a diagram showing an example of a heat sink portion 200 manufactured in the shape of the English letter "V"; Figure 8 (b) is an example of Figure 8 (a) is a three-dimensional view of a heat sink structure in which a heat sink fin portion 200 in the shape of the English letter “V” is fixed to a heat sink body portion 100 by laser welding.

[0104] in addition, Fig. 9 (a) is a diagram showing an example of a heat sink 200 manufactured in a composite shape of a "V" shape and a "U" shape; Fig. 9 (b) is an example of Fig. 9 (a) is a three-dimensional view of a heat sink structure in which a heat sink fin portion 200 formed by a composite of a V-shape and a U-shape is fixed to a heat sink body portion 100 by laser welding.

[0105] in addition, Fig.10 (a) is a diagram showing an example of a heat sink portion 200 manufactured in the shape of the English letter "L"; Fig.10 (b) shows that Fig.10 (a) is a three-dimensional view of a heat sink structure in which an L-shaped heat sink fin portion 200 is fixed to a heat sink body portion 100 by laser welding.

[0106] refer to Figures 7 to 9 The heat sink portion 200 may include a board support member 210 and a heat sink member 220 , which is erected on both end sides of the board support member 210 .

[0107] In addition, refer to Fig.10 The heat sink portion 200 may include a board support member 210 and a heat sink member 220 , and the heat sink member 220 is vertically disposed at any one of the two end portions of the board support member 210 .

[0108] That is, the fin member 220 may be disposed upright on at least a portion of both end portions of the panel support member 210 .

[0109] In the case where the plurality of solder joints 107 include the support block 130, the board support member 210 may be mounted on the support block 130. Then, in the case where the plurality of solder joints 107 do not include the support block 130, the board support member 210 may be mounted on the heat dissipation surface 102 of the heat sink body 100.

[0110] Specifically, if Figure 7 As shown, the heat sink component 220 includes vertical pieces 221, which are arranged at both ends of the board support component 210 and are arranged perpendicular to the board support component 210; or Figure 8 As shown, the heat sink member 220 may include inclined pieces 222 formed at both ends of the board support member 210 and inclined such that the farther away from the board support member 210, the greater the distance between the inclined pieces 222.

[0111] In addition, if Fig. 9 As shown, the heat sink component 220 may also include an inclined piece 222 and a vertical piece 221. The inclined piece 222 is formed at both ends of the plate support component 210 and is inclined so that the distance between them increases as the distance from the plate support component 210 increases. The vertical piece 221 extends from each end of the inclined piece 222 and is perpendicular to the plate support component 210.

[0112] In addition, if Fig.10 As shown, the heat sink member 220 may further include a vertical piece 221 , which is disposed at any one of the two ends of the board support member 210 and is disposed perpendicular to the board support member 210 .

[0113] That is, Figure 7 and Fig.10 As shown, the heat sink member 220 may include a vertical fin 221 which is disposed at least a portion of both end portions of the board support member 210 and is disposed perpendicular to the board support member 210 .

[0114] In addition, the heat sink member 220 can also be manufactured into various known shapes according to the structure of the heat dissipation design in order to dissipate heat for the product as the heat dissipation target.

[0115] On the other hand, an embodiment of a heat sink manufacturing method according to the present invention includes: a preparation step, separately manufacturing a heat sink main body 100 and a plurality of heat sink fins 200 for heat dissipation; and a laser welding step, after the preparation step, fixing the plurality of heat sink fins 200 at intervals from each other on the heat dissipation surface 102 of the heat sink main body 100 by laser welding.

[0116] For example, the preparation step is to manufacture the heat sink body 100 by casting, and the plurality of heat sink fins 200 are manufactured by cutting a manufactured metal plate, such as an aluminum plate or an aluminum alloy plate.

[0117] For example, the laser welding step is to erect the heat sink 200 with the lower end side mounted on the heat sink surface 102, irradiate the laser obliquely between one side of the heat sink 200 and the heat sink surface 102, and then fix the heat sink 200 on the heat sink surface 102 by laser welding.

[0118] In addition, another example can be given. In the preparation step, a plurality of welding joints 107 are protruded from the heat dissipation surface 102 of the heat sink body 100 ; in the laser welding step, a plurality of heat sink portions 200 are respectively joined to the plurality of welding joints 107 by laser welding.

[0119] Specifically, in the preparation step, the heat sink body 100 is manufactured by casting, and the first heat sink support portion 110 may be protrudingly formed on the heat sink surface 102 of the heat sink body 100. In this case, in the laser welding step, the lower end of each of the plurality of heat sinks stands upright on the heat sink surface at one side of the first heat sink support portion, the first heat sink support portion supports one side of each of the plurality of heat sinks, and one side of each of the plurality of heat sinks and one side of the first heat sink support portion may be fixed by laser welding.

[0120] Alternatively, in the preparation step, the heat sink body 100 is manufactured by casting, and the first heat sink support portion 110 and the second heat sink support portion 120 may be formed to protrude and spaced from each other on the heat sink surface 102 of the heat sink body 100. In this case, in the laser welding step, the lower end portion of each of the plurality of heat sink portions is inserted between the first heat sink support portion and the second heat sink support portion and stands upright on the heat sink surface, so that the first heat sink support portion supports one side of each of the plurality of heat sink portions, and the second heat sink support portion supports the other side of each of the plurality of heat sink portions, and one of the one side of each of the plurality of heat sink portions and the one side of the first heat sink support portion and the other side of each of the plurality of heat sink portions and the one side of the second heat sink support portion may be fixed by laser welding.

[0121] Alternatively, in the preparation step, the heat sink body 100 is manufactured by casting, and the support block 130 may be formed protrudingly on the heat dissipation surface 102 of the heat sink body 100. In this case, in the laser welding step, the lower end of each of the plurality of heat sinks stands on the support block and may be fixed to the support block by laser welding.

[0122] Alternatively, in the preparation step, the heat sink body 100 is manufactured by casting, and the support block 130 may be formed protrudingly on the heat dissipation surface 102 of the heat sink body 100, and the first heat sink support 110 may be formed protrudingly on one end of the support block 130, and the second heat sink support 120 may be formed protrudingly on both ends of the support block 130 at a distance from the first heat sink support 110. In this case, in the laser welding step, the lower end of each of the plurality of heat sinks is inserted between the first heat sink support and the second heat sink support to stand upright on the support block, the first heat sink support supports one side of each of the plurality of heat sinks, and the second heat sink support supports the other side of each of the plurality of heat sinks, and one of the one side of each of the plurality of heat sinks and the one side of the first heat sink support and the other side of each of the plurality of heat sinks and the one side of the second heat sink support may be fixed by laser welding.

[0123] The preparation step is to manufacture the radiator main body 100 by casting, and to manufacture the first heat sink support part 110 and the second heat sink support part 120 protrudingly on the heat dissipation surface, in the middle of which the heat sink part 200 can be inserted. For example, the laser welding step includes a heat sink assembling step and a heat sink welding step. The heat sink assembling step is to insert the heat sink part 200 between the first heat sink support part 110 and the second heat sink support part 120, and the heat sink welding step is to irradiate laser on any side of the first heat sink support part 110 and the second heat sink support part 120 to laser weld the heat sink part 200 after the heat sink assembling step.

[0124] In more detail, the heat sink welding step is to obliquely irradiate the laser between the first heat sink support portion 110 and the heat sink portion 200 or between the second heat sink support portion 120 and the heat sink portion 200, or to irradiate the laser between the first heat sink support portion 110 and the heat sink portion 200 and between the second heat sink support portion 120 and the heat sink portion 200 at the same time, and then fix the heat sink portion 200 by laser welding.

[0125] Fig.11It is a photograph of the first test example of laser welding the heat sink fin portion 200 in the heat sink manufacturing method according to the present invention. The first test example is to stand an "I"-shaped heat sink fin portion 200 with a thickness of 1T (mm) on the heat dissipation surface 102 of the heat sink main body 100 with a thickness of 2T (mm) for corner welding.

[0126] Table 1 below illustrates the laser welding conditions in the first test example, which is an example of performing laser welding with the minimum heat input (power) set.

[0127] (Table 1)

[0128] wavelength model power speed frequency Swing length 1070nm Continuous Wave 900w 50mm / s 100Hz 1mm

[0129] Fig.11 (a) is a photo of the enlarged welding area. Fig.11 (b) is a photograph of the bottom surface of the heat sink body 100 after welding.

[0130] refer to Fig.11 (a) confirms that: if the lower end of the "I"-shaped heat sink portion 200 with a thickness of 1T (mm) is directly mounted on the heat dissipation surface 102 of the radiator body 100 and one side of the heat sink portion 200 is fixed by laser welding, the rigidity of the laser welded portion is ensured, but it is difficult to ensure the rigidity of the heat sink portion 200 on the opposite side of the welded portion.

[0131] In this case, the heat sink 200 has insufficient fixing force against the force generated from the welding position side toward the opposite side of the welding position, and there is a risk of damage during use. In order to prevent this risk, there is the inconvenience of laser welding both sides of the heat sink 200.

[0132] In addition, refer to Fig.11 (b) shows that: when the lower end of the "I"-shaped heat sink 200 with a thickness of 1T (mm) is directly mounted on the heat dissipation surface 102 of the radiator main body 100 and one side of the heat sink 200 is laser welded, the minimum heat input (power) is set for laser welding, and bending deformation also occurs in the dotted portion marked with the reference numeral A in the mounting surface 101 serving as the bottom surface of the radiator main body 100.

[0133] Fig.12This is a photograph of the second test example of laser welding the heat sink 200 in the heat sink manufacturing method according to the present invention. The second test example is to protrude the support block 130 on the heat dissipation surface of the 2T (mm) heat sink main body 100, protrude the first heat sink support part 110 and the second heat sink support part 120 with a thickness of 1T (mm) on the support block 130, insert the lower end of the "I"-shaped heat sink part 200 with a thickness of 1T (mm) between the first heat sink support part 110 and the second heat sink support part 120, and irradiate the laser obliquely between the second heat sink support part 120 and the heat sink part 200 to perform fillet welding.

[0134] Table 2 below illustrates the laser welding conditions in the second test example, which is an example in which laser welding is performed with a higher heat input (power) than in the first test example.

[0135] (Table 2)

[0136] wavelength model power speed frequency Swing length 1070nm Continuous Wave 1250w 70mm / s 200Hz 0.4mm

[0137] Fig.12 (a) is a photo of the enlarged welding area. Fig.12 (b) is a photograph of the bottom surface of the heat sink body 100 after welding.

[0138] refer to Fig.12 (a) shows that: the first heat sink support part 110 supports the side of the heat sink part 200 that is not laser welded to strengthen the rigidity of the opposite side of the laser welded part, and the second heat sink support part 120 is partially melted on the upper side during laser welding to play the role of flux and further strengthen the rigidity of the laser welded part. Fig.12 In (b), it can be confirmed that the mounting surface 101 as the bottom surface of the heat sink body 100 does not have any bending deformation.

[0139] As described above, the present invention manufactures the heat sink body 100 and the plurality of heat sink fins 200 separately, and then fixes the plurality of heat sink fins 200 to the heat sink body 100 by laser welding, thereby minimizing the thickness and spacing of the plurality of heat sink fins 200 to improve the heat dissipation performance and significantly reduce the weight. In addition, the present invention manufactures only the heat sink body 100 by casting, thus significantly reducing the time and manufacturing cost required for production.

[0140] A person skilled in the art of the present invention may understand that the present invention may be implemented in other specific ways without changing the technical concept or essential features of the present invention. Therefore, the embodiments described above should be understood as being illustrative in all aspects, rather than restrictive. The scope of the present invention should be indicated by the scope of the claims, rather than the above detailed description, and all changes or deformations derived from the meaning, scope and equivalent concepts of the claims are all included in the scope of the present invention.

[0141] Industrial Applicability

[0142] The present invention provides a heat sink structure and a manufacturing method thereof, wherein a heat sink main body and a plurality of heat sink fins are manufactured separately, and then the plurality of heat sink fins are fixed to the heat sink main body by laser welding, so that the thickness and spacing of the plurality of heat sink fins are minimized, thereby significantly reducing the manufacturing cost.

Claims

1. A heat sink structure, comprising: The heat sink body has a mounting surface on one side, a product to be radiated is located on the mounting surface, and heat dissipation surfaces for heat dissipation on the one side and the other side; and A plurality of heat sinks are erected on the heat dissipation surface of the heat sink body and fixed by laser welding.

2. The heat sink structure according to claim 1, characterized in that: A plurality of welding joints are protrudingly formed on the heat dissipation surface of the heat sink main body, and the plurality of welding joints are respectively connected to the plurality of heat dissipation fins by laser welding.

3. The heat sink structure according to claim 2, characterized in that: The plurality of welding joints respectively include a first heat sink supporting portion, and the first heat sink supporting portion is protrudingly formed on the heat dissipation surface; The lower end of each of the plurality of heat sink portions stands upright on the heat dissipation surface at one side of the first heat sink support portion, and the first heat sink support portion supports one side of each of the plurality of heat sink portions; One side of each of the plurality of heat sink portions is fixed to one side of the first heat sink supporting portion by laser welding.

4. The heat sink structure according to claim 2, characterized in that: The plurality of welded joints respectively include: A first heat sink support portion is formed protrudingly on the heat dissipation surface; and A second heat sink support portion is formed protrudingly on the heat dissipation surface at a distance from the first heat sink support portion; The lower end of each of the plurality of heat sink parts is inserted between the first heat sink supporting part and the second heat sink supporting part and stands upright on the heat dissipation surface, the first heat sink supporting part supports one side of each of the plurality of heat sink parts, and the second heat sink supporting part supports the other side of each of the plurality of heat sink parts; One of one side of each of the plurality of fins and one side of the first fin supporting portion and another side of each of the plurality of fins and one side of the second fin supporting portion is fixed by laser welding.

5. The heat sink structure according to claim 2, characterized in that: The plurality of welding joints respectively include a supporting block portion, and the supporting block portion is protrudingly formed on the heat dissipation surface; The lower end of each of the plurality of heat sink portions stands upright on the support block portion and is fixed to the support block portion by laser welding.

6. The heat sink structure according to claim 2, characterized in that: The plurality of welded joints respectively include: A support block portion protrudingly formed on the heat dissipation surface; A first heat sink support portion, an end portion of which is protrudingly formed on the support block portion; and A second heat sink support portion, which is spaced apart from the first heat sink support portion and protrudes from the other end portion formed on the support block portion; The lower end of each of the plurality of heat sink parts is inserted between the first heat sink supporting part and the second heat sink supporting part and stands upright on the supporting block part, the first heat sink supporting part supports one side of each of the plurality of heat sink parts, and the second heat sink supporting part supports the other side of each of the plurality of heat sink parts; One of a position between one side of each of the plurality of fins and one side of the first fin supporting portion and a position between another side of each of the plurality of fins and one side of the second fin supporting portion is fixed by laser welding.

7. The heat sink structure according to claim 3, characterized in that: The first fin support portion has a thickness that is 0.7 to 1.1 times the thickness of each of the plurality of fin portions.

8. The heat sink structure according to claim 7, characterized in that: The height of the first fin support portion is formed to be 1 to 2 times the thickness of each of the plurality of fin portions.

9. The heat sink structure according to claim 4, characterized in that: The thickness of the first fin support portion and the thickness of the second fin support portion are formed to be 0.7 to 1.1 times the thickness of each of the plurality of fin portions.

10. The heat sink structure according to claim 9, characterized in that: The height of the first fin support portion and the height of the second fin support portion are formed to be 1 to 2 times the thickness of each of the plurality of fin portions.

11. The heat sink structure according to claim 5, characterized in that: The thickness of the support block portion is formed to be 2.4 to 3.3 times the thickness of each of the plurality of heat sink portions.

12. The heat sink structure according to claim 6, characterized in that: The thickness of the first heat sink supporting portion and the thickness of the second heat sink supporting portion are formed to be 0.7 to 1.1 times the thickness of each of the plurality of heat sink portions; The thickness of the support block portion is formed to be 2.4 to 3.3 times the thickness of each of the plurality of heat sink portions.

13. The heat sink structure according to claim 12, characterized in that: The height of the first fin support portion and the height of the second fin support portion are formed to be 1 to 2 times the thickness of each of the plurality of fin portions.

14. The heat sink structure according to claim 1, characterized in that: The plurality of heat sink portions respectively include: board support members; and The fin member is disposed upright on at least a portion of both end portions of the panel support member.

15. The heat sink structure according to claim 14, characterized in that: The heat sink component includes vertical fins, The vertical piece is disposed at least in a part of both end portions of the board support member and is disposed perpendicular to the board support member.

16. The heat sink structure according to claim 14, characterized in that: The heat sink component includes inclined plates, The inclined pieces are formed at both ends of the board support member and are inclined such that the distance between them increases as they are farther from the board support member.

17. The heat sink structure according to claim 16, characterized in that: The heat sink component also includes vertical fins, The vertical pieces extend from respective ends of the inclined pieces and extend perpendicularly to the board supporting member.

18. A method for manufacturing a heat sink structure, comprising: A preparation step of separately manufacturing a heat sink body and a plurality of heat sinks, wherein the heat sink body has a mounting surface on one side, a product to be radiated is located on the mounting surface, and heat sinks on the one side and the other side have heat sinks for heat dissipation, and the plurality of heat sinks play a role in heat dissipation; and The laser welding step is to fix the plurality of heat sinks to the heat dissipation surface of the heat sink body at intervals by laser welding.

19. The method for manufacturing a heat sink structure according to claim 18, characterized in that: In the preparation step, The radiator body is manufactured by casting; The plurality of heat sink portions are manufactured by cutting a manufactured metal plate.

20. The method for manufacturing a heat sink structure according to claim 18, characterized in that: In the preparation step, a plurality of welding joints are formed protruding from the heat dissipation surface of the heat sink main body; In the laser welding step, the plurality of heat sink portions are respectively joined to the plurality of welded joint portions by laser welding.

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