JPH06104583A - Natural air-cooled heat sink - Google Patents
Natural air-cooled heat sinkInfo
- Publication number
- JPH06104583A JPH06104583A JP25246092A JP25246092A JPH06104583A JP H06104583 A JPH06104583 A JP H06104583A JP 25246092 A JP25246092 A JP 25246092A JP 25246092 A JP25246092 A JP 25246092A JP H06104583 A JPH06104583 A JP H06104583A
- Authority
- JP
- Japan
- Prior art keywords
- fins
- base
- heat
- fin
- cooling
- 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.)
- Pending
Links
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子部品実装基板など
の発熱を自然空冷で放熱する自然空冷放熱装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural air-cooling heat radiating device that radiates heat generated by an electronic component mounting board or the like by natural air cooling.
【０００２】[0002]
【従来の技術】従来、この種の放熱器は、発熱体からの
熱流束を熱伝導率の良い構造の基台で受けている。そし
て、基台からの熱流束を複数のフィンに分散させ、この
フィン表面から空気中に放出している。この場合、自然
空冷の放熱器では、空気は下方向から上方向に向かって
流れる。また、モータでファンを回転させる強制空冷で
は、その空気の流れ方向を水平又は下方向から上方向へ
向かわせることが多い。2. Description of the Related Art Conventionally, this type of radiator receives a heat flux from a heating element by a base having a structure having a high thermal conductivity. Then, the heat flux from the base is dispersed into a plurality of fins and is radiated from the fin surfaces into the air. In this case, in the natural air-cooled radiator, the air flows from the lower side to the upper side. Further, in forced air cooling in which a fan is rotated by a motor, the air flow direction is often directed from horizontal or downward to upward.
【０００３】自然空冷の機器の放熱板は、この放熱器を
実装する電子部品の発熱量に応じて基台、フィン等の放
熱面積を決定している。ところで自然空冷の場合、放熱
器を装着する装置の奥行き、幅等に制限がある。したが
って、目標の放熱効果を得る放熱面積を確保するため
に、放熱器の横方向への面積拡大とともに高さ方向に
も、その面積を増大する必要がある。The heat radiation plate of a naturally air-cooled device determines the heat radiation area of the base, fins, etc. according to the amount of heat generated by the electronic parts on which the heat radiator is mounted. By the way, in the case of natural air cooling, there are limitations on the depth, width, etc. of the device on which the radiator is mounted. Therefore, in order to secure a heat dissipation area for obtaining a target heat dissipation effect, it is necessary to increase the area of the radiator in the horizontal direction as well as in the height direction.
【０００４】図３は従来の自然空冷で電子装置基板の冷
却を行う放熱器を示している。図３において、図示しな
い発熱体に取り付けられた基台１に複数のフィン２が、
基台１の表面に直交、かつ、上下方向に延在して設けら
れている。FIG. 3 shows a conventional radiator for cooling an electronic device substrate by natural air cooling. In FIG. 3, a plurality of fins 2 are attached to a base 1 attached to a heating element (not shown),
It is provided orthogonal to the surface of the base 1 and extends in the vertical direction.
【０００５】この構成では、発熱体からの熱流束を基台
１で受け、基台１からの熱流束を複数のフィン２に分散
させて空気中に放出している。この際、矢印ｍ方向に温
められた空気が上昇する。In this structure, the heat flux from the heating element is received by the base 1, and the heat flux from the base 1 is dispersed into the plurality of fins 2 and is discharged into the air. At this time, the air heated in the direction of arrow m rises.
【０００６】この構造では寸法制限がなく基台１、複数
のフィン２を比較的大面積で構成できる場合は、所望の
冷却効果を得ることができる。With this structure, if there is no size restriction and the base 1 and the plurality of fins 2 can be constructed in a relatively large area, a desired cooling effect can be obtained.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記放
熱器にあって、効果的な放熱効果を得るために空気流と
直角方向、すなわち、横方向への面積拡大に比較して、
空気流に沿った上下方向での面積拡大を行うと、冷却空
気が下方向に向かうため、下方向に行くに従って冷却空
気自身が暖められてしまい、結果的に自然放熱が妨げら
れて冷却効果が低下する。However, in the above radiator, in order to obtain an effective heat radiation effect, in comparison with the area expansion in the direction perpendicular to the air flow, that is, in the lateral direction,
When the area is expanded in the vertical direction along the air flow, the cooling air goes downward, so the cooling air itself is warmed as it goes downward, and as a result, natural heat dissipation is hindered and the cooling effect is reduced. descend.
【０００８】さらに、図４に示すようにフィン２の空気
の流れに方向に沿って伝熱境界層ｎの厚みが発達、伝熱
効果が次第に逓減するため面積拡大の割合に対する冷却
効果が向上しないという問題があり、これらの改善が課
題となっていた。Further, as shown in FIG. 4, the thickness of the heat transfer boundary layer n develops along the direction of the air flow of the fins 2 and the heat transfer effect gradually decreases, so that the cooling effect with respect to the area expansion ratio does not improve. However, these improvements have been a problem.
【０００９】本発明は、このような従来における課題を
解決するものであり、自然冷却における冷却効果を向上
できる優れた自然空冷放熱装置の提供を目的とする。SUMMARY OF THE INVENTION The present invention is intended to solve such a conventional problem, and an object thereof is to provide an excellent natural air-cooling heat dissipation device capable of improving the cooling effect in natural cooling.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明の自然空冷放熱装置は、発熱体からの伝熱を
受け、かつ、実質的に垂直に配置される基台と、この基
台の表面から突出するとともに、垂直方向に間隔を有し
て配置される複数のフィンとを備える構成である。In order to achieve the above-mentioned object, a natural air-cooling heat dissipation device of the present invention receives heat from a heating element, and a base arranged substantially vertically. It is a configuration including a plurality of fins protruding from the surface of the base and arranged at intervals in the vertical direction.
【００１１】[0011]
【作用】このような構成により、本発明の自然空冷放熱
装置は、フィンの長手方向の空気流の伝熱境界層の発達
が、フィンの切れ目の間隔で中断される。したがって、
伝熱境界層の発達によるフィンから冷却空気流への熱伝
達の減少が阻止されて、自然冷却における冷却効果が向
上する。With such a configuration, in the natural air cooling heat dissipation device of the present invention, the development of the heat transfer boundary layer of the air flow in the longitudinal direction of the fins is interrupted at the intervals of the fin cuts. Therefore,
The reduction of heat transfer from the fins to the cooling air flow due to the development of the heat transfer boundary layer is prevented, and the cooling effect in natural cooling is improved.
【００１２】[0012]
【実施例】以下、本発明の自然空冷放熱装置の実施例を
図面を参照して詳細に説明する。図１は実施例の構成を
示している。図１において、この例は、図示しない光通
信用デジタル回路などの発熱部品に接合して熱伝導によ
る熱を受ける基台部１２を有している。この基台部１２
には、表面に横方向に複数のフィンが等間隔、かつ、三
段で配置されたフィン部１４、１５、１６が設けられて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a natural air cooling and heat dissipation device of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the configuration of the embodiment. In FIG. 1, this example has a base portion 12 that is joined to a heat-generating component such as a digital circuit for optical communication (not shown) and receives heat by heat conduction. This base part 12
Is provided with fin portions 14, 15 and 16 on the surface of which a plurality of fins are laterally arranged at equal intervals and arranged in three stages.
【００１３】フィン部１４のそれぞれのフィンと同一直
線上、かつ、間隔Ｌａを有してフィン部１５が設けられ
ている。さらに、フィン部１５のそれぞれのフィンと同
一直線上、かつ、間隔Ｌｂを有してフィン部１６が設け
られている。Fin portions 15 are provided on the same straight line as the fins of the fin portion 14 and at intervals La. Further, the fin portions 16 are provided on the same straight line as each fin of the fin portion 15 and at intervals Lb.
【００１４】次に、この実施例の構成における動作、機
能について説明する。フィン部１４、１５、１６の下方
の冷却空気は、この下方からそれぞれのフィン間を図２
に示すように、その伝熱境界層ｒ、ｓ、ｔを発達させな
がら矢印ｎ方向に通流して行く。そして、フィン部１
４、１５、１６のそれぞれの間隔Ｌａ、Ｌｂのところに
到達すると、この間隔Ｌａ、Ｌｂではフィン部材がない
ため、伝熱境界層ｒ、ｓ、ｔが削減する。Next, the operation and function of the configuration of this embodiment will be described. The cooling air below the fins 14, 15 and 16 passes from below to between the fins as shown in FIG.
As shown in FIG. 3, the heat transfer boundary layers r, s, and t flow in the direction of arrow n while developing. And the fin part 1
When the distances La, Lb of 4, 15, 16 are reached, since there are no fin members at the distances La, Lb, the heat transfer boundary layers r, s, t are reduced.
【００１５】このように間隔Ｌａ、Ｌｂでは伝熱境界層
ｒ、ｓ、ｔが消滅し、この後に再び伝熱境界層（ｒ、
ｓ、ｔ）が発達し始める。この場合、フィン部１４、１
５、１６のそれぞれのフィンを間隔Ｌａ、Ｌｂを設けず
に、一つのフィンで構成した場合に比較して伝熱境界層
（ｒ、ｓ、ｔ）の平均厚さが小さくなる。したがって、
フィン部１４、１５、１６のそれぞれの伝熱効果が低減
することなく面積拡大の割合に対する冷却効果が向上す
ることになる。As described above, the heat transfer boundary layers r, s, and t disappear at the intervals La and Lb, and after that, the heat transfer boundary layer (r,
s, t) begins to develop. In this case, the fin portions 14, 1
The average thickness of the heat transfer boundary layer (r, s, t) is smaller than that in the case where the fins 5 and 16 are not provided with the intervals La and Lb and are configured by one fin. Therefore,
The cooling effect with respect to the area expansion ratio is improved without reducing the heat transfer effect of each of the fin portions 14, 15 and 16.
【００１６】なお、この実施例ではフィン部１４、１
５、１６のそれぞれのフィンが同一直線上に配置されて
いるが、この同一直線上でなく千鳥状のようにずれて配
置しても同様の作用、効果が得られる。In this embodiment, the fin portions 14 and 1 are
Although the respective fins 5 and 16 are arranged on the same straight line, the same action and effect can be obtained even if the fins are arranged not on the same straight line but in a staggered manner.
【００１７】[0017]
【発明の効果】以上の説明から明らかなように、本発明
の自然空冷放熱装置は、フィンの長手方向の空気流の伝
熱境界層の発達が、フィンの切れ目の間隔で中断され、
伝熱境界層の発達によるフィンから冷却空気流への熱伝
達の減少を阻止しているため、自然冷却における冷却効
果が向上するという効果を有する。As is apparent from the above description, in the natural air-cooling heat dissipation device of the present invention, the development of the heat transfer boundary layer of the air flow in the longitudinal direction of the fins is interrupted at the intervals of the fin cuts,
Since the reduction of heat transfer from the fins to the cooling air flow due to the development of the heat transfer boundary layer is prevented, the cooling effect in the natural cooling is improved.
【図１】本発明の自然空冷放熱装置の実施例における構
成を示す斜視図FIG. 1 is a perspective view showing a configuration in an embodiment of a natural air-cooling heat dissipation device of the present invention.
【図２】実施例の説明に供され、伝熱境界層の状態を示
す説明図FIG. 2 is an explanatory view showing a state of a heat transfer boundary layer, which is used for explaining an embodiment.
【図３】従来の自然空冷放熱装置における構成を示す斜
視図FIG. 3 is a perspective view showing a configuration of a conventional natural air cooling heat dissipation device.
【図４】従来例の説明に供され、伝熱境界層の状態を示
す説明図FIG. 4 is an explanatory view showing a state of a heat transfer boundary layer, which is used for explaining a conventional example.
１２ 基台部 １４、１５、１６ フィン部 Ｌａ、Ｌｂ 間隔 ｒ、ｓ、ｔ 伝熱境界層 12 Base part 14, 15, 16 Fin part La, Lb Interval r, s, t Heat transfer boundary layer
Claims (1)
に垂直に配置される基台と、この基台の表面から突出す
るとともに、垂直方向に間隔を有して配置される複数の
フィンとを備える自然空冷放熱装置。1. A base which receives heat from a heating element and which is arranged substantially vertically, and a plurality of bases which protrude from the surface of the base and are vertically spaced from each other. A natural air-cooling heat dissipation device with a fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25246092A JPH06104583A (en) | 1992-09-22 | 1992-09-22 | Natural air-cooled heat sink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25246092A JPH06104583A (en) | 1992-09-22 | 1992-09-22 | Natural air-cooled heat sink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06104583A true JPH06104583A (en) | 1994-04-15 |
Family
ID=17237693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25246092A Pending JPH06104583A (en) | 1992-09-22 | 1992-09-22 | Natural air-cooled heat sink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06104583A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613552A (en) * | 1994-07-13 | 1997-03-25 | Nippondenso Co., Ltd. | Cooling apparatus using boiling and condensing refrigerant |
| KR100864569B1 (en) * | 2007-04-17 | 2008-10-20 | 이중재 | Heat sink |
| US7472742B2 (en) * | 2005-12-01 | 2009-01-06 | General Electric Company | Heat sink assembly |
| JP2012028361A (en) * | 2010-07-20 | 2012-02-09 | Furukawa Sky Kk | Heat sink |
| CN103762826A (en) * | 2013-12-26 | 2014-04-30 | 平安电气股份有限公司 | Flow pass type mining frequency converter shell |
-
1992
- 1992-09-22 JP JP25246092A patent/JPH06104583A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613552A (en) * | 1994-07-13 | 1997-03-25 | Nippondenso Co., Ltd. | Cooling apparatus using boiling and condensing refrigerant |
| US7472742B2 (en) * | 2005-12-01 | 2009-01-06 | General Electric Company | Heat sink assembly |
| US20120018138A1 (en) * | 2005-12-01 | 2012-01-26 | General Electric Company | Heat sink system and assembly |
| KR100864569B1 (en) * | 2007-04-17 | 2008-10-20 | 이중재 | Heat sink |
| JP2012028361A (en) * | 2010-07-20 | 2012-02-09 | Furukawa Sky Kk | Heat sink |
| CN103762826A (en) * | 2013-12-26 | 2014-04-30 | 平安电气股份有限公司 | Flow pass type mining frequency converter shell |
| CN103762826B (en) * | 2013-12-26 | 2017-01-04 | 平安电气股份有限公司 | Flow channel type mine-used frequency-converter housing |
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