CN108413805B - Heat sink - Google Patents
Heat sink Download PDFInfo
- Publication number
- CN108413805B CN108413805B CN201810135704.8A CN201810135704A CN108413805B CN 108413805 B CN108413805 B CN 108413805B CN 201810135704 A CN201810135704 A CN 201810135704A CN 108413805 B CN108413805 B CN 108413805B
- Authority
- CN
- China
- Prior art keywords
- opening edge
- heat sink
- groove
- rising
- edge portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000000630 rising effect Effects 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a heat sink. The heat sink has a through groove (10) extending in the row direction in the ridge (20), and an erected piece (30) erected toward the convex surface side of the ridge (20) at an opening edge portion (11) of the through groove (10). The rising pieces (30) are provided on both of a pair of opening edge portions (11, 11) extending in the row direction facing the through-groove (10) and each rising piece (30) is a long piece extending over substantially the entire length of each opening edge portion (11). Thus, even when the corrugated fin is used as a natural convection type fin, heat dissipation capability can be maintained by preventing heat from being lost, the number of crests and troughs can be increased by reducing the interval (pitch) between the intermediate wall portions, the surface area can be increased, and the corrugated fin can be manufactured efficiently at low cost.
Description
Technical Field
The present invention relates to a corrugated fin which is formed of a metal plate in which a plurality of linear crests and troughs are alternately formed, and which is attached so that a surface of a trough on a convex surface side faces a cooling target.
Background
Currently, such a corrugated fin has a problem that heat fills the inside of the peak. Although such heat non-circulation can be prevented in a structure in which a fluid is forcibly circulated by a fan or the like, it is inevitable that heat dissipation capacity is impaired due to heat non-circulation in a structure in which a fan or the like is not provided and the structure is used as a natural convection type.
As in patent document 1, a structure is proposed in which a louver is formed by cutting and raising an intermediate wall between a crest and a trough. When the fluid is forced to circulate, the fluid is rotated, and the heat dissipation efficiency is improved. However, when the natural convection type heat exchanger is used, since the intermediate wall portion has the opening of the louver, air flows out through the opening, and heat is easily accumulated inside the peak portion. In addition, in order to discharge heat through the louvers of the intermediate wall portion, it is necessary to secure a certain interval or more in the intermediate wall portion. Therefore, the increase in the surface area is limited by decreasing the interval (pitch) and increasing the number of peaks and valleys.
Further, such a louver is difficult to process, and it is necessary to form the louver before bending the louver into continuous crests and troughs, but bending the louver-equipped plates is limited in the bending method, and the manufacturing cost is also increased.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2007-5673
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a corrugated fin which can maintain heat radiation capability by preventing heat from being lost even when used as a natural convection type fin, can increase the number of crests and troughs by reducing the interval (pitch) between intermediate wall portions, can increase the surface area, and can be manufactured efficiently at low cost.
Means for solving the problems
The present invention includes the following inventions.
(1) A heat sink, characterized by: the cooling device is composed of a metal plate in which a plurality of line-shaped crests and troughs are alternately formed, the cooling device is attached so that the surface on the convex surface side of the trough faces the object to be cooled, the crests have through grooves extending in the line direction, and rising pieces rising up to the convex surface side of the crests are provided at the opening edge portions of the through grooves.
(2) The heat sink according to (1), wherein the raised pieces are provided on both of a pair of opening edge portions extending in the row direction so as to face the through-grooves and face each other.
(3) The heat sink according to (2), wherein the raised pieces provided at both the opening edge portions are long pieces extending over substantially the entire length of each opening edge portion.
(4) The heat sink according to (2) or (3), wherein the height dimension of the raised pieces provided at both the opening edge portions is substantially half of the dimension of the through groove in the width direction orthogonal to the row direction.
(5) The heat sink according to (4), wherein the rising piece is a cut-and-formed piece.
(6) The heat sink according to any one of (1) to (5), wherein the rising piece protrudes so as to be substantially flush with an intermediate wall portion that connects the crest portion and the trough portion.
(7) The fin according to any one of (1) to (6), wherein the through grooves are provided in the crests or the troughs at intervals in the row direction.
Effects of the invention
The fin according to the present invention thus formed has the through-grooves extending in the row direction in the ridges, and the raised pieces rising toward the convex surfaces of the ridges are provided at the opening edge portions of the through-grooves, so that even when the fin is used as a natural convection type fin, heat inside the ridges can be reliably discharged to the outside through the through-grooves, heat leakage can be eliminated, contact areas between the air and the inner surfaces of the raised pieces at the opening edge portions and the intermediate wall portions between the ridges and the valley portions can be secured, heat can be transferred to the discharged fluid, and heat can be efficiently discharged together with the fluid, thereby greatly improving heat dissipation capability. Since efficient heat dissipation by the through grooves can be ensured even if the interval (pitch) between the intermediate wall portions is reduced, the number of crests and troughs can be increased, and the surface area can be increased.
The through grooves formed in the crests can be easily formed by punching or the like even after the corrugated shape of the crests and troughs is formed, and can be efficiently and inexpensively manufactured by machining such as pressing. Further, the through groove also facilitates deformation into a corrugated shape after processing, and the degree of freedom of shape is high.
Further, by providing the rising pieces on both of the pair of opening edge portions extending in the row direction so as to face the through-groove, respectively, heat can be efficiently transferred from both of the pair of opening edge portions to the fluid passing through the through-groove, and the heat radiation capability can be further improved.
In particular, the rising pieces provided at both the opening edge portions are long pieces extending over substantially the entire length of each opening edge portion, whereby the contact area with the fluid can be ensured more reliably.
Further, by setting the height dimension of the rising pieces provided at both the opening edge portions to a dimension substantially half of the dimension of the through groove in the width direction orthogonal to the row direction, the contact area can be more effectively ensured, and when the rising pieces are cut pieces, the contact area can be maintained to the maximum without wasting the base material.
Further, the rising piece is a cut-and-formed piece, and the rising piece is machined without brazing or the like, whereby the rising piece can be efficiently formed at low cost.
Further, since the rising piece is projected so as to be substantially flush with the intermediate wall portion connecting the crest portion and the trough portion, there is no step or the like where heat is accumulated, and fluid can smoothly flow through the through groove, and an excellent heat radiation effect can be obtained.
Further, since the plurality of through grooves are provided in the crest portion or the trough portion at intervals in the row direction, the base material is bridged therebetween, and therefore, the shape retention property can be improved.
Drawings
Fig. 1 is a perspective view showing a heat sink according to a typical embodiment of the present invention.
Fig. 2 is a plan view of the heat sink.
Fig. 3 is a longitudinal sectional view of the heat sink.
Fig. 4(a) and 4(b) are explanatory diagrams showing, by arrows, a case where the fluid inside the crest absorbs heat and is discharged to the outside through the through-groove.
Fig. 5 is a perspective view of a main portion of the heat sink.
Fig. 6(a) is an explanatory view showing one usage of the heat sink in a modified form, and fig. 6(b) is an explanatory view showing another usage of the heat sink.
Fig. 7(a) is an explanatory view showing still another usage mode, and fig. 7(b) is a perspective view of the heat sink as viewed from the lower surface side.
Fig. 8 is a cross-sectional view showing a main part of a modified example of the heat sink.
Fig. 9 is a perspective view showing a main part of another modification of the heat sink.
Description of the symbols
1 Heat sink
2 Metal plate
4 cooling the object
10 run-through groove
11 opening edge part
20 peak part
21 valley part
22 intermediate wall portion
23 bridge section
The sheet is erected 30 times.
Detailed Description
Next, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in fig. 1 to 5, the heat sink sheet 1 of the present invention is provided with through grooves 10 extending in the row direction for passing a fluid, in the crests 20 of a metal plate 2 in which a plurality of crests 20 and troughs 21 are alternately formed in a row, with rising pieces 30 rising toward the convex surface side of the crests 20 being provided at the opening edge portions 11 of the through grooves 10, and is attached so that the convex surface side of the troughs 21 faces the object to be cooled 4.
In the present embodiment, the fin 1 is used by being attached in a state where the convex surface side of the valley portion 21 is directly in contact with the object to be cooled 4, but the present invention is not limited to this, and for example, although not shown, it may be configured such that a base member having good thermal conductivity, such as a metal, is provided in contact with the convex surface of the valley portion 21, and the base member is fixed to the object to be cooled.
The fin 1 of the present invention may be used as a forced fluid flow type, or may be used as a natural convection type without forced fluid flow. The fin 1 of the present invention can efficiently discharge heat inside through the through grooves 10 formed in the ridges 20 even when used as a natural convection type, regardless of the forced flow of fluid, thereby preventing the inside from being filled with heat and improving heat radiation performance. In both the case of forced circulation and the case of natural convection, cooling can be performed by a fluid such as an air-cooled or water-cooled liquid.
Further, in the fin 1 of the present invention, the uneven surface formed by the ridges 20 and the valleys 21 provides a large surface area on the inner surface side for releasing heat, and the contact area of the forcibly flowing fluid or natural convection increases by the amount of the rising pieces 30 formed on the inner surface and the opening edge portion of the through groove 110 of the ridge 20, so that the through groove can be formed without impairing the heat release effect. Of course, the surface area may be increased by further reducing the interval (pitch) between the intermediate wall portions and increasing the number of crests and troughs.
The uneven shape (wavy shape) formed by the ridges 20 and the valleys 21 and the rising pieces 30 of the ridges 20 can be formed at low cost by press working. In particular, the rising piece 30 can be efficiently formed by cutting and raising by punching at the same time as or after the press working of the uneven shape. Of course, the present invention is not limited to such a processing method and processing step.
In the present embodiment, the crests 20 and the troughs 21 are bent into angular rectangular shapes and formed into the overall irregular shape, but the crests and the troughs may be bent into smooth continuous curved shapes. The "crests" and "troughs" are defined as a lower surface on one side of the uneven surface fixed to the object 4, an upper surface on the other side, a portion projecting toward the upper surface as a "crest", and a portion projecting toward the lower surface as a "trough". The width dimensions of the crests and troughs (the dimension in the width direction perpendicular to the column direction) may be set to a ratio that is much larger or smaller than the illustrated ratio, i.e., the height dimension of the intermediate wall portion.
The through groove 10 is formed in the entirety of the peak 20 in the present embodiment, but is not limited thereto. Or may be formed skipping one or more peaks 20. The size, number, arrangement, and the like of the through grooves 10 can be appropriately determined so as to obtain appropriate shape retention and heat dissipation performance according to the type of the object 4 to be cooled, the size of the heat sink, and the like.
In the present embodiment, the through-grooves 10 are formed as grooves elongated in the row direction and are formed into the basic shape shown in fig. 1, and then can be easily deformed into an appropriate shape as shown in fig. 6(a), 6(b), and 7. However, in addition to the above-described mode of penetrating the grooves 10, for example, a plurality of grooves that are long in the width direction perpendicular to the rows may be intermittently provided at intervals in the row direction.
In the present embodiment, two through grooves 10 long in the row direction are connected to one ridge 20 at an interval, and the shape retention of the entire ridge can be maintained by the bridge portion 23 (the remaining portion between the through grooves 10 in the ridge 20) formed therebetween. However, the length and the interval of the through-grooves 10 may be appropriately determined according to the thickness of the plate, other dimensions, and the degree of shape retention to be obtained, and for example, three or more through-grooves 10 may be provided in series in the row direction, or only one through-groove may be provided.
The rising pieces 30 can be provided on both of the pair of opening edges 11 and 11 extending in the row direction so as to face the through-groove 10, respectively, and contact the fluid (including the fluid that forcibly flows and the fluid that naturally convects) passing through the through-groove 10 from both of the opening edges 11 and 11, thereby efficiently radiating heat. However, as shown in fig. 8, it is needless to say that only one opening edge portion 11 may be provided. In the case of cutting, the projecting length of the rising pieces 30 and 31 formed in the one opening edge portion 11 can be extended as long as possible.
The rising pieces 30 provided at both the opening edge portions are long pieces extending over substantially the entire length of each opening edge portion, but as shown in fig. 9, it is needless to say that a plurality of rising pieces 30 may be provided at intervals. In this case, as shown in fig. 9, the long standing pieces 30 can be formed by alternately (zigzag) cutting the opening edge portions 11.
The rising piece 30 may be formed by brazing a separately formed piece, but can be formed efficiently and at low cost by machining by forming a cut-and-formed piece. Specifically, the through groove 10 is formed by forming the rising pieces 30 by cutting along the center of the ridge portion 20 on both sides. By cutting from the center to both sides, the height dimensions of the rising pieces 30 provided at both the opening edge portions 11, 11 of the through-groove 10 to be formed become the same, specifically, the dimension of approximately half of the dimension in the width direction orthogonal to the row direction of the through-groove.
In this way, the rising piece 30 is formed by cutting and raising, and can be formed without wasting the base material, and the contact area with the fluid inside and outside can be increased to the maximum. The rising piece 30 protrudes so as to be substantially flush with the intermediate wall portion 22 connecting the crest portion and the trough portion. That is, the rising piece 30 and the through groove 10 are formed by cutting and rising using the entire width of the top surface (bottom surface) of the ridge portion 20, and there is no step between the through groove 10 and the intermediate wall portion 22.
While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments at all, and it is needless to say that the present invention can be implemented in various forms without departing from the scope of the present invention.
Claims (7)
1. A heat sink, characterized by:
the heat sink is made of a metal plate in which a plurality of linear crests and troughs are alternately formed, and is attached so that the convex surface side of the trough faces the object to be cooled,
the crest portion has a through groove extending in the row direction, and a rising piece rising toward the convex surface side of the crest portion is provided at an opening edge portion of the through groove, and the fluid inside the crest portion can be released to the outside through the through groove while absorbing heat,
the rising pieces are provided on both of a pair of the opening edge portions extending in the row direction so as to face the through-groove, and are configured to come into contact with the fluid passing through the through-groove from both of the opening edge portions, or the rising pieces are provided on only one of the opening edge portions and come into contact with the fluid passing through the through-groove from one of the opening edge portions.
2. The heat sink of claim 1,
the rising pieces are provided on both of a pair of opening edge portions extending in the row direction so as to face the through-grooves, respectively.
3. The heat sink of claim 2,
the rising pieces provided at both the opening edge portions are long pieces extending over substantially the entire length of each opening edge portion.
4. The heat sink of claim 2 or 3,
the height dimension of the rising pieces provided at both the opening edge portions is substantially half of the dimension of the through groove in the width direction orthogonal to the row direction.
5. The heat sink of claim 4,
the rising piece is a cut-and-formed piece.
6. The heat sink as recited in any one of claims 1 to 3,
the rising piece protrudes so as to be substantially flush with an intermediate wall portion that connects the crest portion and the trough portion.
7. The heat sink as recited in any one of claims 1 to 3,
the through grooves are provided in a plurality in the crest portion or the trough portion at intervals in the row direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017023419A JP6867012B2 (en) | 2017-02-10 | 2017-02-10 | heatsink |
| JP2017-023419 | 2017-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108413805A CN108413805A (en) | 2018-08-17 |
| CN108413805B true CN108413805B (en) | 2022-02-15 |
Family
ID=63127149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810135704.8A Active CN108413805B (en) | 2017-02-10 | 2018-02-09 | Heat sink |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6867012B2 (en) |
| CN (1) | CN108413805B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0521979A (en) * | 1991-07-12 | 1993-01-29 | Fujitsu Ltd | Printed board shield structure |
| CN101208796A (en) * | 2005-06-27 | 2008-06-25 | 株式会社丰田自动织机 | Heat sink for power module |
| CN101309577A (en) * | 2007-05-17 | 2008-11-19 | 日立电线机械技术株式会社 | Heat sink and method of making same |
| CN101701780A (en) * | 2009-09-09 | 2010-05-05 | 东莞勤上光电股份有限公司 | Heat radiation section bar |
| CN203758340U (en) * | 2014-02-18 | 2014-08-06 | 浙江银轮机械股份有限公司 | Wave-shaped heat exchanger fin |
| JP2014167852A (en) * | 2013-02-28 | 2014-09-11 | Nexone Innovation Co Ltd | Heat sink inducing flow of convection |
| CN105320239A (en) * | 2015-08-31 | 2016-02-10 | 广东明路电力电子有限公司 | Network metal structure phase change heat absorbing radiator |
| CN205066534U (en) * | 2015-08-31 | 2016-03-02 | 广东明路电力电子有限公司 | Can assemble radiator |
| CN205068276U (en) * | 2015-08-31 | 2016-03-02 | 广东明路电力电子有限公司 | Network metallic structure phase transition heat absorption radiator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53144056U (en) * | 1977-04-20 | 1978-11-14 | ||
| JPS56136986U (en) * | 1980-03-18 | 1981-10-16 | ||
| JP2002153717A (en) * | 2000-11-16 | 2002-05-28 | Nitta Ind Corp | Gas removing filter |
| CN1469219A (en) * | 2002-07-15 | 2004-01-21 | 鹏 简 | Composite processing method of heat conduction device and heat conduction device |
| JP3543969B1 (en) * | 2003-06-05 | 2004-07-21 | 株式会社オーデン | Metal filter, black smoke particulate removal device provided with the metal filter, and diesel vehicle |
| KR100804525B1 (en) * | 2005-03-24 | 2008-02-20 | 삼성에스디아이 주식회사 | Integrated circuit chip heat dissipation member and display module having same |
| JP3153291U (en) * | 2009-04-10 | 2009-09-03 | 株式会社 ショウリキテクニカル | Heat sink unit |
| CN108367087B (en) * | 2015-12-11 | 2022-03-29 | 先技精工(日本)有限公司 | Air purifying structure of air purifier, air purifier and photocatalyst filter |
-
2017
- 2017-02-10 JP JP2017023419A patent/JP6867012B2/en active Active
-
2018
- 2018-02-09 CN CN201810135704.8A patent/CN108413805B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521979A (en) * | 1991-07-12 | 1993-01-29 | Fujitsu Ltd | Printed board shield structure |
| CN101208796A (en) * | 2005-06-27 | 2008-06-25 | 株式会社丰田自动织机 | Heat sink for power module |
| CN101309577A (en) * | 2007-05-17 | 2008-11-19 | 日立电线机械技术株式会社 | Heat sink and method of making same |
| CN101701780A (en) * | 2009-09-09 | 2010-05-05 | 东莞勤上光电股份有限公司 | Heat radiation section bar |
| JP2014167852A (en) * | 2013-02-28 | 2014-09-11 | Nexone Innovation Co Ltd | Heat sink inducing flow of convection |
| CN203758340U (en) * | 2014-02-18 | 2014-08-06 | 浙江银轮机械股份有限公司 | Wave-shaped heat exchanger fin |
| CN105320239A (en) * | 2015-08-31 | 2016-02-10 | 广东明路电力电子有限公司 | Network metal structure phase change heat absorbing radiator |
| CN205066534U (en) * | 2015-08-31 | 2016-03-02 | 广东明路电力电子有限公司 | Can assemble radiator |
| CN205068276U (en) * | 2015-08-31 | 2016-03-02 | 广东明路电力电子有限公司 | Network metallic structure phase transition heat absorption radiator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108413805A (en) | 2018-08-17 |
| JP2018129484A (en) | 2018-08-16 |
| JP6867012B2 (en) | 2021-04-28 |
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