JPH022700A - Insulating heat pipe radiator - Google Patents

Abstract

PURPOSE:To obtain a radiator with a heat pipe having different diameters at an evaporating part and at a condensing part used, simple to manufacture, with little heat resistance and good in characteristics by a method wherein an evaporating part made of a heat conductive block with a tubelike hole made and a condensing part are connected by an insulator and medium members, either of whose diameter is different. CONSTITUTION:A heat conductive block 3 is equipped with one or two or more tubelike holes to constitute an evaporating part 11. A tube 5 thinner than the diameter of the evaporating part 11 is equipped with a fin 2 to constitute a condensing part. The evaporating part 11 and the condensing part are connected by an insulator 7 and medium members 6, 6' either of which has a different diameter, and operating liquid 9 made of insulating material is sealed inside. For example, between a condensing tube made of copper and a copper block 3, an insulator 7 made of alumina whose inner diameter has a taper is sealed by medium members 6, 6' made of sealing material of Fe-Ni alloy, and the medium members 6, 6' are brazed on the copper block 3 of the evaporating part 11 and the condensing tube 5 with silver solder to constitute a sealing insulation type heat pipe radiator with fleon R113 poured from a nozzle 8.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は半導体素子や電子機器などの冷却に用いられる
絶縁型ヒートパイプ放熱器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insulated heat pipe radiator used for cooling semiconductor devices, electronic equipment, etc.

〔従来の技術とその課題〕[Conventional technology and its issues]

半導体素子や電子機器の発熱部の冷却にはヒートパイプ
式放熱器が用いられている。このヒートパイプ式放熱器
は、熱を集合或いは分散するためのブロック（ヒートシ
ンク）に孔をあけてヒートパイプを挿入し、この部分を
蒸発部とし、凝縮部にフィンを設けて放熱部とし、ブロ
ック部の熱を放熱部により放熱するものである。そして
ヒートパイプの蒸発部と凝縮部の熱流束変換のため、伝
熱管長比を変更したり、蒸発部と凝縮部の管径を変化さ
せたものである。また近年サイリスク等の加工技術が向
上して半導体素子の大容量化が進み、例えば鉄道車輌用
として使用されるようになった。Heat pipe type heat sinks are used to cool the heat generating parts of semiconductor devices and electronic devices. This heat pipe type heat radiator is made by drilling a hole in a block (heat sink) for collecting or dispersing heat and inserting a heat pipe into the block. The heat radiating part radiates the heat from the radiator. In order to convert the heat flux between the evaporation section and the condensation section of the heat pipe, the heat transfer tube length ratio is changed and the tube diameters of the evaporation section and the condensation section are changed. Furthermore, in recent years, processing techniques such as SIRISK have improved, and the capacity of semiconductor devices has increased, and they have come to be used, for example, in railway vehicles.

鉄道車輌用の場合のような安全性が重要視される環境に
おいては接触する恐れのある場所は電気的に絶縁してお
くことが望ましく蒸発部と凝縮部の間に絶縁部を設けた
ものが用いられている。この絶縁型ヒートパイプ放熱器
は、第３図に示すようにヒートパイプブ（１）とフィン
（２）とフ゛ロング（３）と客色縁体（７）とからなリ
ヒートパイプの内部に絶縁性流体の作動液が封入されて
おり蒸発部のブロック（３）の表面に取付けられた半導
体素子（図示せず）の熱は作動液の蒸発、凝縮のヒート
パイプの作動により凝縮部のフィンにより放熱されて、
半導体素子が冷却される。この絶縁型ヒートパイプ放熱
器を作製するには第４図に示すように蒸発部となる径の
太い蒸発部の管体（４）と、４ｔｌＷ部となる径の異な
る凝縮部管体（５）をＦｅ−Ｎｉ合金の封着材料の中間
体（６）、（６′）により、アルミナ、セラミックなど
の電気絶縁体（７）と接続して一体化し、管体先端のノ
ズル（８）部とから作動液（９）を封入してヒートバイ
ブ化したものを、第５図に示すようにブロック（３）に
あけられた孔に挿入しハンダＧＯ）などにより接合して
絶縁型ヒートバイブ放熱器としたものである。In environments where safety is important, such as in the case of railway vehicles, it is desirable to electrically insulate areas where there is a risk of contact. It is used. As shown in Fig. 3, this insulated heat pipe radiator has an insulating fluid inside a reheat pipe consisting of a heat pipe block (1), fins (2), fins (2), lengths (3), and a color rim (7). The heat of the semiconductor element (not shown) attached to the surface of the block (3) of the evaporation section, which contains the working fluid, is radiated by the fins of the condensation section by the operation of the heat pipe for evaporation and condensation of the working fluid. ,
The semiconductor element is cooled. To make this insulated heat pipe radiator, as shown in Fig. 4, the evaporator tube body (4) with a large diameter becomes the evaporator section, and the condensation section tube body (5) with a different diameter becomes the 4tlW section. is connected to an electrical insulator (7) such as alumina or ceramic through intermediate bodies (6) and (6') of sealing material of Fe-Ni alloy, and is integrated with the nozzle (8) at the tip of the tube. The working fluid (9) is sealed in the heat vibrator, which is inserted into the hole drilled in the block (3) as shown in Fig. 5, and bonded with solder (GO) to form an insulated heat vibrator radiator. That is.

しかしこのような絶縁型ヒートパイプ放熱器は凝縮部の
径の異なる管体（５）はスェージング加工等により予め
加工を要するものであり、またブロックと管体をハンダ
付けするため熱抵抗が増加して性能が低下するなどの問
題があった。However, in such an insulated heat pipe radiator, the tubes (5) with different diameters in the condensing part require pre-processing by swaging, etc., and the thermal resistance increases because the block and tube are soldered. There were problems such as performance deterioration.

［発明が解決しようとする課Ｈ］ 本発明は上記の問題について検討の結果、蒸発部と凝縮
部の径の異なるヒートバイブにおいて、製造が容易でか
つ熱抵抗が少なく特性の優れた絶縁型ヒートパイプ放熱
器を開発したものである。[Problem H to be solved by the invention] As a result of studying the above-mentioned problems, the present invention has developed an insulated heat vibrator that is easy to manufacture, has low thermal resistance, and has excellent characteristics in a heat vibrator with different diameters for the evaporating section and the condensing section. This is a pipe radiator developed.

〔課題を解決するための手段および作用］本発明は熱伝
導性のブロックに１または２以上の管状の孔を設けてこ
れを蒸発部とし、該蒸発部の径より細い管体にフィンを
設けて凝縮部とし、蒸発部と凝縮部の間を絶縁体または
中間体のいずれかを異なる径にした絶縁体と中間体で接
続し、内部に絶縁性の作動液を封入してなる絶縁型ヒー
トパイプ放熱器である。すなわち本発明は第１図に示す
ように銅などの熱伝導性の良いブロック（３）に１個ま
たは２個以上の管状の孔を設けてこの孔を蒸発部（ＩＩ
）とし、この蒸発部の径より細い管に多数のフィン（２
）を設けて凝縮部管体（５）とし、この蒸発部と凝縮部
の間をアルミナ、セラミンクなどの絶縁体（力および到
着材料からなる中間体（６）、（６′）のいずれかを異
なった径とした！ｆｉ　縁体（７）と中間体（６）、（
６′）で接続し内部に絶縁性のフロンＲ１１３などの作
動液（９）を封入して絶縁型ヒートパイプ放熱器とした
ものである。[Means and effects for solving the problems] The present invention provides one or more tubular holes in a thermally conductive block, which serves as an evaporation section, and a fin provided in a tubular body having a diameter smaller than that of the evaporation section. An insulated type heat with an insulating working fluid sealed inside, the evaporating part and the condensing part are connected by an insulator or an intermediate with an insulator of a different diameter. It is a pipe radiator. That is, as shown in FIG. 1, the present invention provides one or more tubular holes in a block (3) of good thermal conductivity such as copper, and connects these holes to the evaporation section (II).
), and a large number of fins (2
) is provided to form the condensing section tube body (5), and between the evaporating section and the condensing section, an insulator such as alumina or ceramic (an intermediate body (6) or (6') consisting of the material and the arriving material is installed). The !fi edge body (7) and intermediate body (6) with different diameters (
6') and a working fluid (9) such as insulating Freon R113 is sealed inside to form an insulated heat pipe radiator.

しかして上記の蒸発部と凝縮部の接続は、第２図（ａ）
に示すように凝縮管体（５）と蒸発部（１りの間に内径
の異なる（凝縮部側が細い）絶縁体（７）を挿入しこの
両側を封着材料の中間体（６）、（６′）で封着し、中
間体（６）、（６′）と凝縮管体（５）および中間体（
６）と蒸発部０１）と突合わせ、或いは嵌合した上、銀
ろう、真鍮ろうなどにより溶接するものである。この場
合上記の絶縁体（７）は、その内径を細い凝縮管体（５
）の内径に合わせるためにテーパーを付けたものを使用
したものであるが、要は絶縁体または中間体のいずれか
で凝縮管体側が細くするような接続手段を採用すればよ
く、例えば同図（Ｃ）のように絶縁体（７）の内径は変
えることなく中間体（６）に凝縮部側が細くなるような
テーパーを付けてもよい。また同図（ｄ）のように、中
間体（６′）の凝縮部側を細く絞り加工したものを使用
してもよい。なお同図（ｂ）に示すものは絶縁体（７）
の外径にテーパーを付けて沿面距離を変えることにより
耐電圧を変化させることもできる。Therefore, the connection between the evaporation section and the condensation section is as shown in Fig. 2(a).
As shown in the figure, an insulator (7) with a different inner diameter (thinner on the condensing part side) is inserted between the condensing pipe body (5) and the evaporating part (1), and an intermediate member (6) of sealing material is inserted between both sides of the insulator (7). 6'), and the intermediates (6), (6'), the condensing tube body (5) and the intermediate body (6') are sealed together.
6) and the evaporator part 01) or are fitted together, and then welded using silver solder, brass solder, or the like. In this case, the above insulator (7) has a narrow inner diameter (5).
), but in short, it is sufficient to use a connecting means that is made thinner on the condensing tube side using either an insulator or an intermediate body; for example, the one shown in the same figure As shown in (C), the intermediate body (6) may be tapered so that the condensation part side becomes thinner without changing the inner diameter of the insulator (7). Alternatively, as shown in FIG. 2(d), an intermediate body (6') whose condensing portion side is drawn thinly may be used. In addition, the thing shown in the same figure (b) is an insulator (7)
The withstand voltage can also be changed by tapering the outer diameter and changing the creepage distance.

本発明は上記したように絶縁体または中間体に径の異な
るものを使用することにより、凝縮管体を異径にする加
工を省略してコストの低減を図ると共に、ブロックに蒸
発部となる孔を設け、これを直接にヒートバイブの蒸発
容器としたもので従来のように蒸発管体とブロックとの
ハンダ付けを不要としたので熱抵抗が少なく、−段と特
性の優れた絶縁型ヒートパイプ放熱器が得られるもので
ある。As described above, by using insulators or intermediates with different diameters, the present invention aims to reduce costs by omitting processing to make the condensing pipe body different in diameter. This directly serves as the evaporation container of the Heat Vibe, eliminating the need for soldering between the evaporator tube body and the block as in the past, resulting in an insulated heat pipe with low thermal resistance and excellent characteristics. A radiator is obtained.

〔実施例〕〔Example〕

以下に本発明の一実施例について説明する。 An embodiment of the present invention will be described below.

第１図に示すように中１００ｍｍ、高さ１００ｍｍ。As shown in Figure 1, the inside is 100mm and the height is 100mm.

厚さ３０Ｉｎｆｆｌの銅ブロック（３）に内径２０ｍｍ
φ、深さ９０ＩＩｌｆｆｉの孔を３個あけて、これを７
発部とした。Copper block (3) with a thickness of 30 Inffl and an inner diameter of 20 mm.
Drill 3 holes with a diameter of φ and a depth of 90 IIlffi, and
It was the starting point.

一方向径１４舗φ、厚さ１．２閣、長さ２５０＋ｎ＋ｏ
の３本の鋼管にフィンを多数設け、ノズルを付けて凝縮
管体（５）とした、この凝縮管体と銅ブロックの間に第
２図（ａ）に示すようなアルミナ製の内径が２０ｍｍと
１４ｍｍのテーパーを有する絶縁体（７）をＦｅＮｉ合
金の封着材料からなる中間体（６）、（６′）により封
着し、この中間体をそれぞれ１発部の銅ブロック（３）
および凝縮管体（５）と限ろうによりろう付けし、ノズ
ルからフロンＲ１１３を注入して封し切り絶縁型ヒート
パイプ放熱器とした。この放熱器の銅ブロツク表面に放
熱量約ｓｏｏｗのサイリスクを１個取付けて試験を行な
った結果、従来の同寸法の放熱器よりも熱抵抗が熱抵抗
が１０％程度減少し性能が向上した。One direction diameter: 14mm, thickness: 1.2mm, length: 250+n+o
A number of fins were installed on three steel pipes, and a nozzle was attached to form the condensing pipe body (5). Between this condensing pipe body and the copper block, there was an alumina inner diameter of 20 mm as shown in Figure 2 (a). An insulator (7) having a taper of 14 mm is sealed with intermediate bodies (6) and (6') made of FeNi alloy sealing material, and each of these intermediate bodies is attached to one copper block (3).
Then, it was brazed to the condensing pipe body (5) using a limited solder, and Freon R113 was injected from the nozzle to seal it off to form an insulated heat pipe radiator. A test was carried out by attaching one cylisk with a heat dissipation amount of about sooo to the surface of the copper block of this heatsink. As a result, the thermal resistance was reduced by about 10% compared to a conventional heatsink of the same size, and the performance was improved.

〔効果］ 以上に説明したように本発明によれば製造が容易でかつ
特性の優れた絶縁型ヒートパイプ放熱器が得られるもの
で工業上顕著な効果を奏するものである。[Effects] As explained above, according to the present invention, an insulated heat pipe heat radiator that is easy to manufacture and has excellent characteristics can be obtained, and has a significant industrial effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例に係る絶縁型ヒートバイブ放
熱器の断面図、第２図は接続部の断面図、第３図は従来
の絶縁型ヒートバイブ放熱器の側面図、第４図は従来の
絶縁型ヒートパイプの側面図、第５図は従来の絶縁型ヒ
ートバイブ放熱器の蒸発部の断面図である。 １・・・ヒートパイプ、　　２・・・フィン、　　３・
・・ブロク、　４・・・蒸発部管体、　５・・・凝縮部
管体、　６゜６′・・・中間体、　７・・・絶縁体、　
８・・・ノズル、９・・・作動液、　　１０・・・ハン
ダ、　　１１・・・蒸発部。 ４蒸発部管体 第４図 ９作動液 第１図 第２図FIG. 1 is a cross-sectional view of an insulated heat-vib radiator according to an embodiment of the present invention, FIG. 2 is a sectional view of a connecting portion, FIG. 3 is a side view of a conventional insulated heat-vib radiator, and FIG. The figure is a side view of a conventional insulated heat pipe, and FIG. 5 is a cross-sectional view of the evaporation part of a conventional insulated heat vibrator. 1... Heat pipe, 2... Fin, 3.
...Block, 4...Evaporating section tube, 5...Condensing section tube, 6゜6'...Intermediate body, 7...Insulator,
8... Nozzle, 9... Working fluid, 10... Solder, 11... Evaporation section. 4 Evaporator pipe body Fig. 4 9 Working fluid Fig. 1 Fig. 2

Claims (1)

【特許請求の範囲】[Claims] 熱伝導性のブロックに１または２以上の管状の孔を設け
てこれを蒸発部とし、該蒸発部の径より細い管体にフィ
ンを設けて凝縮部とし、蒸発部と凝縮部の間を絶縁体ま
たは中間体のいずれかを異なる径にした絶縁体と中間体
で接続し、内部に絶縁性の作動液を封入してなる絶縁型
ヒートパイプ放熱器。One or more tubular holes are provided in a thermally conductive block to serve as an evaporation section, fins are provided on a tube body smaller in diameter than the evaporation section to serve as a condensation section, and the evaporation section and condensation section are insulated. An insulated heat pipe heat radiator is made by connecting either the body or the intermediate body to an insulator with a different diameter and the intermediate body, and sealing an insulating working fluid inside.