JP2013239666A - Heat sink - Google Patents

Heat sink Download PDF

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JP2013239666A
JP2013239666A JP2012113072A JP2012113072A JP2013239666A JP 2013239666 A JP2013239666 A JP 2013239666A JP 2012113072 A JP2012113072 A JP 2012113072A JP 2012113072 A JP2012113072 A JP 2012113072A JP 2013239666 A JP2013239666 A JP 2013239666A
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lid member
fin
heat sink
angle
heating element
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JP6026772B2 (en
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Mitsuru Yanagisawa
満 柳澤
Hayato Kyomasu
隼人 京増
Joji Yamazaki
丈嗣 山崎
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T Rad Co Ltd
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T Rad Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

PROBLEM TO BE SOLVED: To cool a heating unit more efficiently in a liquid-cooled heat sink having an inner fin that is at least partially molded by die casting.SOLUTION: A side wall part 1 is erected on an outer periphery of a base part 2 forming a bottom surface and a number of fin parts 3, each of which has a trapezoid shape in an elevation view, are integrally provided on the base part 2 so as to protrude and be separated from each other in a two dimensional direction to form a core member 4. A lid member 5 is attached to the opening side of the core member 4 and a heating unit 6 is placed in contact with an outer surface of the lid member 5. In each fin part 3, an angle α formed between an upstream side edge 3b and the lid member 5 is an acute angle and is smaller than an angle β formed between a downstream side edge 3c of the fin part 3 and the lid member 5. This structure leads a larger amount of a refrigerant circulating therein to the lid member 5 side and effectively cools the heating unit 6 attached thereto.

Description

本発明は、パワートランジスタやインバータ等の電子部品を冷媒で冷却するヒートシンクであって、少なくともその一部をダイキャスト成形するものに関する。   The present invention relates to a heat sink that cools electronic components such as power transistors and inverters with a refrigerant, and at least a part of the heat sink is die-cast.

ヒートシンクは、空冷によるものと、液冷によるものとがある。
液冷によるものは、その密閉空間内に冷却水や気液二相状態の冷媒を流通させ、その外面側に発熱体を接触させ、それを冷却するものである。
冷却効率を向上させるため、内部にインナーフィンを設けている。 The heat sink is either air-cooled or liquid-cooled.
In the liquid cooling, cooling water or a gas-liquid two-phase refrigerant is circulated in the sealed space, and a heating element is brought into contact with the outer surface side to cool it.
Inner fins are provided inside to improve cooling efficiency.

特開２００８−１４０８０２号公報JP 2008-140802 A

インナーフィンを有する液冷ヒートシンクにおいて、さらに熱交換性能がよく、且つコンパクトなものが求められている。それとともに、製造しやすく、部品点数の少ないものが求められている。
そこで、本発明は係る課題を解決することを目的とする。 A liquid-cooled heat sink having an inner fin is required to have a better heat exchange performance and a more compact size. At the same time, there is a demand for products that are easy to manufacture and have a small number of parts.
Therefore, an object of the present invention is to solve the problem.

請求項１に記載の本発明は、底面を形成する基部(2)に対向する一対の側壁部(1)が厚み方向に一体に立設されると共に、その基部(2) に二次元方向に互いに離間して並列され、その厚み方向へ同一の高さで且つ側壁部(1)に平行に、多数の立面台形のフィン部(3)が一体に突設されたダイキャスト製のコア部材(4)と、
前記基部(2) に対向すると共に、それぞれのフィン部(3)の頂部(3a)および両側壁部(1)に接触する蓋部材(5)と、を具備し、冷媒(7)が前記一対の側壁部(1)に平行に流通し、
コア部材(4)と蓋部材(5)の各接触部がろう付け接合または、拡散接合され、
蓋部材(5)の外面に発熱体(6)が接触し、各フィン部(3)の流れ方向の上流側の縁(3b)と、発熱体(6)が接触する蓋部材(5)とのなす角αが鋭角に形成され且つ、
その角αが、フィン部(3)の下流側の縁(3c)と発熱体が接触する蓋部材(5)とのなす角βよりも鋭角の、α＜βであることを特徴とするヒートシンクである。 In the first aspect of the present invention, the pair of side wall portions (1) facing the base portion (2) forming the bottom surface are integrally provided in the thickness direction, and the base portion (2) is provided in a two-dimensional direction. A die-cast core member that is parallel to and spaced apart from each other, and has a plurality of upright trapezoidal fin portions (3) integrally projecting at the same height in the thickness direction and parallel to the side wall portion (1). (4) and
A cover member (5) facing the base portion (2) and contacting the top portion (3a) and both side wall portions (1) of each fin portion (3). In parallel with the side wall (1) of the
Each contact portion of the core member (4) and the lid member (5) is brazed or diffusion bonded,
The heating element (6) contacts the outer surface of the lid member (5), the upstream edge (3b) in the flow direction of each fin portion (3), and the lid member (5) with which the heating element (6) contacts Is formed with an acute angle, and
The heat sink, characterized in that the angle α is more acute than the angle β formed by the edge (3c) on the downstream side of the fin portion (3) and the lid member (5) in contact with the heating element, α <β It is.

請求項２に記載の本発明は、請求項１に記載のヒートシンクにおいて、
各フィン部(3)は、その基部(2) に二次元方向に互いに離間して平面千鳥状に並列され、フィン部(3)の下流側の縁(3c)と発熱体が接触する蓋部材(5)とのなす角βも鋭角であることを特徴とするヒートシンクである。 The present invention according to claim 2 is the heat sink according to claim 1,
Each fin part (3) is spaced apart from each other in the two-dimensional direction in the base part (2) and is arranged in a zigzag plane so that the downstream edge (3c) of the fin part (3) contacts the heating element. The heat sink is characterized in that the angle β formed with (5) is also an acute angle.

請求項３に記載の本発明は、請求項１または請求項２に記載のヒートシンクにおいて、
基部(2) の厚み方向の両側に前記多数のフィン部(3)および側壁部(1)が一体に突設され、その厚み方向の両側に前記蓋部材(5)が一対設けられ、それぞれの蓋部材(5)の外面に発熱体(6)が接触し、その基部(2) の厚み方向の両側に冷媒(7)が流通するヒートシンクである。 The present invention according to claim 3 is the heat sink according to claim 1 or 2,
The fins (3) and the side wall (1) are integrally projected on both sides in the thickness direction of the base (2), and a pair of the lid members (5) are provided on both sides in the thickness direction. This is a heat sink in which the heating element (6) is in contact with the outer surface of the lid member (5), and the refrigerant (7) circulates on both sides of the base portion (2) in the thickness direction.

本発明のヒートシンクは、蓋部材５の外面に発熱体６が接触し、各フィン部３の流れ方向の上流側の縁3bと、発熱体６が接触する蓋部材５とのなす角αが鋭角に形成され且つ、その角αが、フィン部３の下流側の縁3cと発熱体が接触する蓋部材５とのなす角βよりも鋭角の、α＜βであることを特徴とする。
そのため、冷媒７はフィン部３の上流側の縁3bの鋭角αにより案内されて、発熱体６側に導かれる。そして、冷媒を発熱体６側により多く流通させて、発熱体と冷媒との熱交換を促進する。
しかも、フィン部３の下流側の縁3cと発熱体側の表面とのなす角βを、角αより大きくしたので、両角が同一の場合に比べて、フィン部３の頂部3aの長さを可及的に長くし、フィンと発熱体との伝熱を促進する。
さらに、各フィン３は、立面が台形状に形成されているため、それがダイキャスト成形の際の型抜き勾配となり、型抜きが容易に行え、その金型制作も容易で、ヒートシンクを安価に提供できる。 In the heat sink of the present invention, the heating element 6 contacts the outer surface of the lid member 5, and the angle α formed between the upstream edge 3b of each fin portion 3 in the flow direction and the lid member 5 with which the heating element 6 contacts is an acute angle. And the angle α is more acute than the angle β formed by the edge 3c on the downstream side of the fin portion 3 and the lid member 5 in contact with the heating element, α <β.
Therefore, the refrigerant 7 is guided by the acute angle α of the edge 3b on the upstream side of the fin portion 3 and guided to the heating element 6 side. And more refrigerant | coolants are distribute | circulated to the heat generating body 6 side, and heat exchange with a heat generating body and a refrigerant | coolant is accelerated | stimulated.
Moreover, since the angle β formed between the edge 3c on the downstream side of the fin portion 3 and the surface on the heating element side is made larger than the angle α, the length of the top portion 3a of the fin portion 3 can be made longer than when both angles are the same. It is made as long as possible to promote heat transfer between the fin and the heating element.
Furthermore, since each fin 3 has a trapezoidal elevation, it becomes a die-cutting gradient when die-casting, making it easy to mold, making the mold easy, and making the heat sink inexpensive. Can be provided.

請求項２に記載の発明のように、フィン部３の下流側の縁3cと発熱体が接触する蓋部材５とのなす角βも鋭角である場合には、さらにその型抜きが容易となる。また、各フィン部３は、その基部２に二次元方向に互いに離間して平面千鳥状に並列され、上流側のフィン部３の流れの影響をなくして、発熱体６の冷却を促進できる。   When the angle β formed by the edge 3c on the downstream side of the fin portion 3 and the lid member 5 in contact with the heating element is also an acute angle as in the invention described in claim 2, the die can be easily removed. . In addition, the fin portions 3 are spaced apart from each other in the two-dimensional direction on the base portion 2 and are arranged in a zigzag pattern, thereby eliminating the influence of the flow of the fin portions 3 on the upstream side and promoting the cooling of the heating element 6.

請求項３に記載のヒートシンクのように、基部２の厚み方向の両側に前記多数のフィン部３および側壁部１が一体に突設され、その厚み方向の両側に前記蓋部材５が一対設けられ、それぞれの蓋部材５の外面に発熱体６が接触し、その基部２の厚み方向の両側に冷媒７が流通する場合には、より多くの発熱体６の取付が可能であると共に、コンパクトなヒートシンクとなる。   As in the heat sink according to claim 3, the plurality of fin portions 3 and the side wall portions 1 are integrally projected on both sides in the thickness direction of the base portion 2, and a pair of the lid members 5 are provided on both sides in the thickness direction. When the heating element 6 contacts the outer surface of each lid member 5 and the refrigerant 7 circulates on both sides of the base 2 in the thickness direction, more heating elements 6 can be attached and more compact. It becomes a heat sink.

本発明のヒートシンクの第１実施例を示す分解斜視図。The disassembled perspective view which shows 1st Example of the heat sink of this invention. 図３のII-II矢視断面略図。II-II arrow cross-sectional schematic of FIG. 図２のIII-III矢視断面図。III-III arrow sectional drawing of FIG. 本発明のヒートシンクの第２実施例を示す分解斜視図。The disassembled perspective view which shows 2nd Example of the heat sink of this invention. 同組立て状態を示す平面図。The top view which shows the same assembly state. 本発明のヒートシンクの第３実施例を示す縦断面図。The longitudinal cross-sectional view which shows 3rd Example of the heat sink of this invention. 本発明のヒートシンクの第４実施例を示す縦断面図。The longitudinal cross-sectional view which shows 4th Example of the heat sink of this invention. 本発明のヒートシンクの第５実施例を示し、図９のVIII-VIII矢視縦断面図。The 5th Example of the heat sink of this invention is shown, and the VIII-VIII arrow longitudinal cross-sectional view of FIG. 図８のIX-IX矢視平面図。The IX-IX arrow top view of FIG.

（第１実施例）
次に、図面に基づいて本発明の実施の形態につき、説明する。
図１〜図３は、本発明の第１実施例であり、このヒートシンクはコア部材４と蓋部材５と一対の入口パイプ８、出口パイプ９とを有する。
コア部材４はダイキャスト成形により製造される。この例では、底面を形成する基部２の四周に側壁部１が立ち上げられて、箱状を形成する。そして、その内部に多数の台形状のフィン部３が二次元方向に互いに離間し、且つ千鳥状に並列されている。各フィン部３は、冷媒の流通方向に並列している。それとともに、フィン部３の頂部3aの高さは、側壁部１の高さと同一である。そして、冷媒の流通方向両端部には、マニホールド部が形成されている。 (First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention, and this heat sink has a core member 4, a lid member 5, a pair of inlet pipes 8 and an outlet pipe 9.
The core member 4 is manufactured by die casting. In this example, the side wall portion 1 is raised around the four circumferences of the base portion 2 forming the bottom surface to form a box shape. A large number of trapezoidal fin portions 3 are spaced apart from each other in the two-dimensional direction and are arranged in a staggered manner. Each fin part 3 is parallel to the distribution direction of the refrigerant. At the same time, the height of the top portion 3 a of the fin portion 3 is the same as the height of the side wall portion 1. And the manifold part is formed in the both ends of the distribution direction of a refrigerant | coolant.

図２のごとく、フィン部３の上流側の縁3bと蓋部材５とのなす角αは、蓋部材５とフィン部３の下流側の縁3cとのなす角βよりも小である。即ち、α＜βとなるように形成されている。また、αおよびβともに鋭角であり、それがダイキャスト成形の抜き勾配となる。そして、内面側にろう材が被覆された蓋部材５が側壁部１上に載置される。また、蓋部材５の両端部に配置された孔12に、両面ろう材がクラッドされた環状のパッチプレート10を介して入口パイプ８の端部が挿入される。そして、それらを組立てた状態で、高温の炉内に挿入されて、一体的にろう付け固定される。なお、そのろう付けの代わりに、拡散接合により一体化してもよい。   As shown in FIG. 2, the angle α formed between the upstream edge 3 b of the fin portion 3 and the lid member 5 is smaller than the angle β formed between the lid member 5 and the downstream edge 3 c of the fin portion 3. That is, it is formed so that α <β. Further, both α and β are acute angles, and this becomes the draft angle of die casting. Then, the lid member 5 whose inner surface side is coated with the brazing material is placed on the side wall portion 1. Further, the end portion of the inlet pipe 8 is inserted into the holes 12 arranged at both ends of the lid member 5 through the annular patch plate 10 clad with the double-sided brazing filler metal. Then, in an assembled state, they are inserted into a high-temperature furnace and integrally brazed and fixed. In addition, you may integrate by diffusion joining instead of the brazing.

そして、図２および図３に示すごとく、蓋部材５表面に発熱体６が接合され、入口パイプ８から冷却水等の冷媒７がヒートシンク内部に流入する。そして、図３のごとく、千鳥状に配置された各フィン部３の間を冷媒７が蛇行して流通する。このとき、図２に示すごとく、フィン部３の上流側の縁3bに案内され、冷媒７は蓋部材５側により多く導かれる。そして、蓋部材５に接する発熱体６側により多くの冷媒７を導き、発熱体６の冷却効果を促進する。   2 and 3, the heating element 6 is joined to the surface of the lid member 5, and the refrigerant 7 such as cooling water flows from the inlet pipe 8 into the heat sink. As shown in FIG. 3, the refrigerant 7 snakes and circulates between the fin portions 3 arranged in a staggered manner. At this time, as shown in FIG. 2, the refrigerant 7 is guided to the upstream edge 3 b of the fin portion 3, and more refrigerant 7 is guided to the lid member 5 side. And more refrigerant | coolants 7 are guide | induced to the heat generating body 6 side which touches the cover member 5, and the cooling effect of the heat generating body 6 is accelerated | stimulated.

（第２実施例）
次に、図４および図５は本発明の第２実施例であり、それが第１実施例と異なる点は、入口パイプ８および出口パイプ９の取付位置のみである。
この例では、コア部材４の一方の側壁部１の両端部に一対の半円弧状の欠切部19をダイキャスト成形に一体的に設けるとともに、その厚み方向中央にスリット13を形成する。このスリット13の幅は、入口パイプ８の環状凸部11の厚みとパッチプレート10の厚みとの和に整合する。 (Second embodiment)
Next, FIGS. 4 and 5 show a second embodiment of the present invention. The only difference from the first embodiment is the attachment position of the inlet pipe 8 and the outlet pipe 9.
In this example, a pair of semicircular arc-shaped notches 19 are integrally provided at both ends of one side wall 1 of the core member 4 by die casting, and a slit 13 is formed at the center in the thickness direction. The width of the slit 13 matches the sum of the thickness of the annular projection 11 of the inlet pipe 8 and the thickness of the patch plate 10.

そして、蓋部材５はプレス成形により、その長手方向両端部に一対の膨出部15を配置するとともに、その中間部にスリット13を形成する。そして、入口パイプ８とパッチプレート10をコア部材４の欠切部19及びスリット13に嵌着する。ついで、蓋部材５をコア部材４の上方から被嵌し、両者を一体的にろう付け固定する。そして、図５のごとく、蓋部材５の外表面に発熱体６を接合するものである。   The lid member 5 is formed by press forming a pair of bulging portions 15 at both ends in the longitudinal direction, and a slit 13 is formed at an intermediate portion thereof. Then, the inlet pipe 8 and the patch plate 10 are fitted into the notch 19 and the slit 13 of the core member 4. Next, the lid member 5 is fitted from above the core member 4, and both are integrally brazed and fixed. And as shown in FIG. 5, the heat generating body 6 is joined to the outer surface of the lid member 5.

（第３実施例）
次に、図６は本発明の第３実施例であり、この例はコア部材４の長手方向の両端部に一対の入口パイプ８、出口パイプ９を配置したものである。また、基部２がマニホールド部を境に台形状に隆起するように形成され、その上にフィン部３が形成されている。 (Third embodiment)
Next, FIG. 6 shows a third embodiment of the present invention, in which a pair of inlet pipes 8 and outlet pipes 9 are arranged at both ends of the core member 4 in the longitudinal direction. Further, the base portion 2 is formed so as to rise in a trapezoidal shape with the manifold portion as a boundary, and the fin portion 3 is formed thereon.

（第４実施例）
次に、図７は本発明の第４実施例であり、この例はコア部材４の外周に、ケーシング部17を一体的に突設したものである。そして、内部に蓋部材５を配置するとともに、ケーシング部17の上側にケーシング蓋20を配置したものである。そして、インバータ等の発熱体６は、蓋部材５に接合される。このケーシング部17およびケーシング蓋20により、インバータ等を塵埃、その他から保護することができる。ケーシング蓋の替わりに、ケーシング部17内部を樹脂材でモールドすることもできる。 (Fourth embodiment)
FIG. 7 shows a fourth embodiment of the present invention. In this example, a casing portion 17 is integrally projected on the outer periphery of the core member 4. The lid member 5 is disposed inside, and the casing lid 20 is disposed above the casing portion 17. The heating element 6 such as an inverter is joined to the lid member 5. The casing portion 17 and the casing lid 20 can protect the inverter and the like from dust and the like. Instead of the casing lid, the inside of the casing portion 17 can be molded with a resin material.

（第５実施例）
次に、図８は本発明の第５実施例であり、この例のコア部材４は、その高さ方向中間の位置に基部２が存在し、その基部２の上下両側にそれぞれフィン部３が一体に突設されている。また、基部２の冷媒流通方向両端には連通孔18が設けられてコア部材４を構成している。このコア部材４も前記第１実施例〜第４実施例と同様に、ダイキャスト成形により製造される。その金型は一例として、図において、上下方向に移動する図示しない上金型と下金型を有し且つ、そのいずれかの金型に出入口パイプの軸線方向に移動する棒部材を有する。このコア部材４は、その長手方向両端に一対の入口パイプ８、出口パイプ９が配置される。
そして、コア部材４の上下両面には一対の蓋部材５がろう付け等の手段により接合され、それぞれの蓋部材５に発熱体６が接合される。そして、入口パイプ８から冷媒７が内部に導かれ、その冷媒７は図８のごとく、上下両面側により多く導かれる。
それとともに、図９のごとく、千鳥状に配置された各フィン部３を蛇行状に流通し、熱交換を促進する。 (5th Example)
Next, FIG. 8 shows a fifth embodiment of the present invention. In the core member 4 of this example, the base portion 2 exists at a middle position in the height direction, and the fin portions 3 are respectively provided on the upper and lower sides of the base portion 2. Projected as a single unit. In addition, communication holes 18 are provided at both ends of the base 2 in the refrigerant flow direction to constitute the core member 4. This core member 4 is also manufactured by die-casting, similar to the first to fourth embodiments. As an example, the mold has an upper mold and a lower mold (not shown) that move in the vertical direction in the figure, and one of the molds has a bar member that moves in the axial direction of the inlet / outlet pipe. The core member 4 is provided with a pair of inlet pipes 8 and outlet pipes 9 at both longitudinal ends thereof.
A pair of lid members 5 are joined to the upper and lower surfaces of the core member 4 by means such as brazing, and the heating elements 6 are joined to the respective lid members 5. And the refrigerant | coolant 7 is guide | induced inside from the inlet pipe 8, The refrigerant | coolant 7 is guide | induced more by the upper and lower both surfaces side like FIG.
At the same time, as shown in FIG. 9, the fins 3 arranged in a staggered manner are circulated in a meandering manner to promote heat exchange.

いずれの各実施例も、冷媒７の流通方向上流側であるフィン部３の縁3bと蓋部材５とのなす角αが、下流側の縁3cと蓋部材５とのなす角βよりも小である。それにより、冷媒を蓋部材５側により多く流通させ、そこに接合された発熱体６を効果的に冷却するものである。   In any of the embodiments, the angle α formed between the edge 3b of the fin portion 3 on the upstream side in the flow direction of the refrigerant 7 and the lid member 5 is smaller than the angle β formed between the downstream edge 3c and the lid member 5. It is. Thereby, more refrigerant is circulated on the lid member 5 side, and the heating element 6 joined thereto is effectively cooled.

１ 側壁部
２ 基部
３ フィン部
3a 頂部
3b 縁
3c 縁
４ コア部材
５ 蓋部材
６ 発熱体 1 Side wall part 2 Base part 3 Fin part
3a top
3b rim
3c Edge 4 Core member 5 Lid member 6 Heating element

７ 冷媒
８ 入口パイプ
９ 出口パイプ
10 パッチプレート
11 環状凸部
12 孔
13 スリット
14 スリット 7 Refrigerant 8 Inlet pipe 9 Outlet pipe
10 Patch plate
11 Annular projection
12 holes
13 Slit
14 Slit

15 膨出部
16 段付き部
17 ケーシング部
18 連通孔
19 欠切部
20 ケーシング蓋
α 傾斜角
β 傾斜角 15 bulge
16 Stepped part
17 Casing part
18 Communication hole
19 Notch
20 Casing lid α Inclination angle β Inclination angle

Claims (3)

底面を形成する基部(2)に、対向する一対の側壁部(1)が厚み方向に一体に立設されると共に、その基部(2) に二次元方向に互いに離間して並列され、その厚み方向へ同一の高さで且つ側壁部(1)に平行に、多数の立面台形のフィン部(3)が一体に突設されたダイキャスト製のコア部材(4)と、
前記基部(2) に対向すると共に、それぞれのフィン部(3)の頂部(3a)および両側壁部(1)に接触する蓋部材(5)と、を具備し、冷媒(7)が前記一対の側壁部(1)に平行に流通し、
コア部材(4)と蓋部材(5)の各接触部がろう付け接合または、拡散接合され、
蓋部材(5)の外面に発熱体(6)が接触し、各フィン部(3)の流れ方向の上流側の縁(3b)と、発熱体(6)が接触する蓋部材(5)とのなす角αが鋭角に形成され且つ、
その角αが、フィン部(3)の下流側の縁(3c)と発熱体が接触する蓋部材(5)とのなす角βよりも鋭角の、α＜βであることを特徴とするヒートシンク。 A pair of opposing side wall portions (1) are erected integrally with the base portion (2) forming the bottom surface in the thickness direction, and are spaced apart from each other in the two-dimensional direction in parallel with the base portion (2). A die-cast core member (4) having a plurality of elevational trapezoidal fin portions (3) integrally projecting at the same height in the direction and parallel to the side wall portion (1);
A cover member (5) facing the base portion (2) and contacting the top portion (3a) and both side wall portions (1) of each fin portion (3). In parallel with the side wall (1) of the
Each contact portion of the core member (4) and the lid member (5) is brazed or diffusion bonded,
The heating element (6) contacts the outer surface of the lid member (5), the upstream edge (3b) in the flow direction of each fin portion (3), and the lid member (5) with which the heating element (6) contacts Is formed with an acute angle, and
The heat sink, characterized in that the angle α is more acute than the angle β formed by the edge (3c) on the downstream side of the fin portion (3) and the lid member (5) in contact with the heating element, α <β . 請求項１に記載のヒートシンクにおいて、
各フィン部(3)は、その基部(2) に二次元方向に互いに離間して平面千鳥状に並列され、フィン部(3)の下流側の縁(3c)と発熱体が接触する蓋部材(5)とのなす角βも鋭角であることを特徴とするヒートシンク。 The heat sink according to claim 1.
Each fin part (3) is spaced apart from each other in the two-dimensional direction in the base part (2) and is arranged in a zigzag plane so that the downstream edge (3c) of the fin part (3) contacts the heating element. A heat sink characterized in that an angle β formed with (5) is also an acute angle. 請求項１または請求項２に記載のヒートシンクにおいて、
基部(2) の厚み方向の両側に前記多数のフィン部(3)および側壁部(1)が一体に突設され、その厚み方向の両側に前記蓋部材(5)が一対設けられ、それぞれの蓋部材(5)の外面に発熱体(6)が接触し、その基部(2) の厚み方向の両側に冷媒(7)が流通するヒートシンク。 The heat sink according to claim 1 or 2,
The fins (3) and the side wall (1) are integrally projected on both sides in the thickness direction of the base (2), and a pair of the lid members (5) are provided on both sides in the thickness direction. A heat sink in which the heating element (6) contacts the outer surface of the lid member (5), and the refrigerant (7) circulates on both sides in the thickness direction of the base (2).
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