JPH02157596A - Heat pipe - Google Patents
Heat pipeInfo
- Publication number
- JPH02157596A JPH02157596A JP63313482A JP31348288A JPH02157596A JP H02157596 A JPH02157596 A JP H02157596A JP 63313482 A JP63313482 A JP 63313482A JP 31348288 A JP31348288 A JP 31348288A JP H02157596 A JPH02157596 A JP H02157596A
- Authority
- JP
- Japan
- Prior art keywords
- heat pipe
- wick
- container
- heat
- wicks
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 229910001000 nickel titanium Inorganic materials 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野〕
本発明はヒートパイプのウィック構造に関し、ウィック
押えとして形状記憶合金からなる成形体によりウィック
の密着性を高め特にマイクロヒートパイプなどの細径の
ヒートパイプの長さ方向の熱特性の均一性を向上させた
ものである。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to the wick structure of a heat pipe, and uses a molded body made of a shape memory alloy as a wick retainer to improve the adhesion of the wick, especially for small-diameter heat pipes such as micro heat pipes. This improves the uniformity of thermal characteristics along the length of the heat pipe.
ヒートパイプは比較的簡単な構造で熱輸送量が大きいこ
とから広い工業分野にわたって使用されており、ヒート
パイプの熱輸送量の向上に努力がなされている。Heat pipes have a relatively simple structure and a large amount of heat transport, so they are used in a wide range of industrial fields, and efforts are being made to improve the heat transport amount of heat pipes.
この特性の向上にはウィックの構造が重要な役割を占め
ており、ウィックの改良の試みが種々行なわれている。The structure of the wick plays an important role in improving these characteristics, and various attempts have been made to improve the wick.
従来し一ドパイブのウィックとしては金属のワイヤーを
ヒートパイプ容器内に挿入したもの、或いは金属のメツ
シュなどを挿入したもの、またはヒートパイプ容器の内
壁を直接粗面化したり、細い溝を設けたものなどがある
。しかしこれらのウィックはいずれも、ウィックの作製
およびヒートパイプにする工程などが複雑となり、コス
ト高になる要因となっていた。Conventional single-pipe wicks include those in which a metal wire is inserted into the heat pipe container, or a metal mesh is inserted into the heat pipe container, or the inner wall of the heat pipe container is directly roughened or thin grooves are provided. and so on. However, in all of these wicks, the process of manufacturing the wick and making it into a heat pipe is complicated, leading to high costs.
また最近、エレクトロニクスの発展によりＩＣ１ＬＳＩ
などの素子の小型化および基板のコンパクト化が図られ
てきた。それに伴い、単位面積当りの発熱量は大きく上
昇してきており、その熱をどのように分散或いは除去す
るか極めて大きな問題になっている。この熱の除去につ
いて現在ヒートパイプを用いて解決するのが最も有効と
されているが、それらのヒートパイプには多くの場合、
断面積が９−以下のいわゆるマイクロヒートパイプで最
大熱輸送量が２〜３Ｗ以上のものが要求される。Recently, with the development of electronics, IC1LSI
Efforts have been made to make devices smaller and substrates more compact. Along with this, the amount of heat generated per unit area has increased significantly, and how to disperse or remove this heat has become an extremely important problem. Currently, the most effective solution for removing this heat is to use heat pipes, but these heat pipes often have
A so-called micro heat pipe with a cross-sectional area of 9 mm or less and a maximum heat transport amount of 2 to 3 W or more is required.
しかし従来のヒートパイプではこのような要求を達成す
ることができないので、ウィックの構造を改良して熱輸
送量を向上することが試みられている。However, since conventional heat pipes cannot meet these requirements, attempts have been made to improve the wick structure to increase the amount of heat transport.
マイクロヒートバイブは、ヒートパイプ容器の内径が１
〜３閣と小さく、その断面形状は円形、角形、異形のも
のが使用される。したがって従来のように容器の内壁に
沿って均一に極細線のウィックを設けると、蒸気通路部
分が殆どなくなってしまい、ヒートパイプの熱輸送量が
大きく低下する。またウィック層の厚さを薄（して蒸気
通路部分を確保しようとするとウィックが必要とする毛
細管力（作動液を戻す力）を十分に発揮できなくなる。Micro Heat Vibe has a heat pipe container with an inner diameter of 1
It is small, about 3 cabinets, and its cross-sectional shape is circular, square, or irregular. Therefore, if a wick of ultra-thin wire is provided uniformly along the inner wall of the container as in the conventional method, the steam passage portion is almost completely eliminated, and the amount of heat transported by the heat pipe is greatly reduced. Furthermore, if an attempt is made to reduce the thickness of the wick layer to secure a steam passage portion, the wick will not be able to sufficiently exert the required capillary force (power to return the working fluid).
そこで、これを改良するために極細線からなるウィック
の内側にコイルスプリングを介在させ、これを細長い治
具によりヒートパイプ容器の内部に挿入し、治具を引抜
いて、コイルスプリングのばね力によりヒートパイプ容
器の内壁にウィックを密着さ、せる方法が試みられてい
る。Therefore, in order to improve this, a coil spring was interposed inside the wick made of ultra-thin wire, and this was inserted into the inside of the heat pipe container using a long and thin jig, and when the jig was pulled out, the spring force of the coil spring heated the coil spring. Attempts have been made to attach the wick to the inner wall of the pipe container.
しかしこの方法ではウィックを挿入する際ウィックとコ
イルスプリングとの整合性が悪く、またばね性も弱いの
でウィック層の厚さを偏りがなく、均一に全長にわたっ
て密着させることが困難なため、得られるヒートパイプ
の熱輸送特性は長さ方向により、温度が低下するという
問題があった。However, with this method, the alignment between the wick and the coil spring is poor when inserting the wick, and the spring properties are also weak, making it difficult to achieve uniform wick layer thickness and uniform contact over the entire length. The heat transport characteristics of heat pipes have a problem in that the temperature decreases depending on the length direction.
本発明は上記の問題について検討の結果、ヒートパイプ
容器の内壁にウィックを偏りがなく均一に全長にわたっ
て密着させて熱輸送特性に優れ、かつ熱輸送特性が均一
なヒートパイプを開発したものである。As a result of studies on the above-mentioned problems, the present invention has developed a heat pipe that has excellent heat transport properties and uniform heat transport properties by making the wick stick evenly and uniformly over the entire length of the inner wall of the heat pipe container. .
〔課題を解決するための手段および作用］本発明はヒー
トパイプ容器内にウィックと共に形状記憶合金からなる
ウィック押えを介在させ該ウィック押えの形状回復力に
よりウィックをヒートパイプ容器内壁に密着させたこと
を特徴とするヒートパイプである。[Means and effects for solving the problem] The present invention includes a wick presser made of a shape memory alloy interposed together with a wick in the heat pipe container, and the wick is brought into close contact with the inner wall of the heat pipe container by the shape recovery force of the wick presser. This is a heat pipe with the following characteristics.
すなわち本発明は、第１図に示すように一端が封じられ
た銅などのヒートパイプ容器（１）内に銅などの極細線
のウィック（２）の内側に形状記憶合金からなるコイル
（３）を介在せしめ、このコイルを形状記憶合金の回復
温度に加熱し、コイルの回復力によりウィックをヒート
パイプ容器内壁に押付けて密着させ、この後常法により
ヒートパイプ内部を真空にし、水などの作動液を注入し
てヒートパイプ容器の一端を封じ切り、ヒートパイプと
するものである。また他の例としては第２図に示すよう
に、形状記憶合金からなるウィック押えの形状を多孔板
を円筒状に成形した多孔体（４）としてもよく、さらに
他の例としては第３図に示すようにヒートパイプ容器（
１１の内壁の一面にウィック（２）を集合して多孔板（
５）と共に挿入しウィックを内壁の一面に密着させるよ
うにしてもよい、この場合ウィックの集合された部分が
作動液還流部（６）となリウイックの存在しない部分が
蒸気通路部（７）となるものである、この形状記憶合金
のウィック押えの形状としては上記の他に第４図に示す
ような網状円筒体（８）としてもよい。That is, as shown in FIG. 1, the present invention has a coil (3) made of a shape memory alloy inside a wick (2) of an ultra-thin wire made of copper or the like in a heat pipe container (1) made of copper or the like with one end sealed. The coil is heated to the recovery temperature of the shape memory alloy, the coil's recovery force presses the wick against the inner wall of the heat pipe container, and then the inside of the heat pipe is evacuated by a conventional method, and the wick is heated to the recovery temperature of the shape memory alloy. A heat pipe is created by injecting liquid and sealing off one end of the heat pipe container. As another example, as shown in FIG. 2, the shape of the wick retainer made of a shape memory alloy may be a porous body (4) formed by molding a perforated plate into a cylindrical shape, and as another example, as shown in FIG. heat pipe container (as shown in
The wicks (2) are assembled on one side of the inner wall of No. 11 and the perforated plate (
5), so that the wick is brought into close contact with one surface of the inner wall. In this case, the part where the wicks are assembled becomes the working fluid reflux part (6), and the part where there is no rewick becomes the steam passage part (7). In addition to the shape described above, the shape of the wick retainer made of the shape memory alloy may be a reticulated cylindrical body (8) as shown in FIG.
このように本発明においてはウィック押えに形状記憶合
金を使用し、その形状の回復力によりウィックを押えつ
け、ヒートパイプ容器内壁に密着させるため、密着性が
よく、ヒートパイプの熱輸送特性が向上するものである
。また特にマイクロヒートパイプの如き細径のヒートパ
イプにした場合も所定の比率の作動液還流部と蒸気通路
部を形成することができ熱輸送特性の均一なマイクロヒ
ートパイプが得られるものである。In this way, in the present invention, a shape memory alloy is used for the wick holder, and the wick is held down by its shape recovery force, making it adhere to the inner wall of the heat pipe container, resulting in good adhesion and improving the heat transport characteristics of the heat pipe. It is something to do. In particular, even when a small diameter heat pipe such as a micro heat pipe is used, the working fluid reflux section and the steam passage section can be formed in a predetermined ratio, and a micro heat pipe with uniform heat transport characteristics can be obtained.
本発明において上記の形状記憶合金とは、Ｎｉ−Ｔｉ合
金およびこれに種々の元素を添加した合金の他、公知の
形状記憶合金が使用できる。但し、コイル状と異なる形
状、例えば多孔板、多孔体とするときは、この穿孔率は
５０〜９０％の範囲が好ましい、この多孔にするのは作
動液還流部と蒸気通路を結ぶためと挿入の際の取扱いが
容器なこと、挿入後のばね性を適当に保持するために必
要であり、５０％未満では、ばね性が強過ぎ、また通路
を結ぶ面積が小さくなるからであり、９０％を越えると
ばね性が弱くなるからである。In the present invention, the above-mentioned shape memory alloy may be a Ni-Ti alloy or an alloy to which various elements are added, as well as a known shape memory alloy. However, when using a shape different from a coil shape, such as a perforated plate or a porous body, the perforation rate is preferably in the range of 50 to 90%. This is necessary to ensure that the container is handled properly during insertion and to maintain proper springiness after insertion.If it is less than 50%, the springiness will be too strong and the area connecting the passages will be small; This is because the springiness becomes weaker when the value exceeds .
上記の形状記憶合金は超弾性特性を併せて有しているも
ので、柔軟なばね性により一層密着性が良好なものであ
る。The above-mentioned shape memory alloy also has superelastic properties, and its flexible spring properties provide even better adhesion.
なお本発明においてはヒートバイブ容器およびウィック
の材質としては従来公知の種々のものが使用できる。In the present invention, various conventionally known materials can be used for the heat vibrator container and the wick.
（実施例） 以下に本発明の一実施例について説明する。(Example) An embodiment of the present invention will be described below.
外径３■φ、肉厚０．３鵬、長さ２００Ｍの一端を封じ
た鋼管を第１図に示すようなヒートバイブ容器（１）と
し、この内部にワイヤー線径０．０７ｎφの銅極細線を
多数本用いてウィック（２）とし、この内側にＮｉ−Ｔ
ｉ形状記憶合金からなる、コイル線径０．１閣のコイル
（３）を介在させ、これを４０°Ｃに加熱してコイルを
拡張させウィックをヒートバイブ容器内壁に密着させた
。この後常法により、作動液として水を封入してマイク
ロヒートパイプを作製した。A heat-vib container (1) as shown in Fig. 1 is made of a steel pipe with an outer diameter of 3 mm, a wall thickness of 0.3 mm, and a length of 200 m with one end sealed. A large number of wires are used to form a wick (2), and Ni-T is placed inside this wick (2).
A coil (3) made of a shape memory alloy and having a coil wire diameter of 0.1 mm was interposed, and this was heated to 40°C to expand the coil and bring the wick into close contact with the inner wall of the heat vibrator container. Thereafter, a micro heat pipe was fabricated by sealing water as a working fluid using a conventional method.
一方従来例として上記の形状記憶合金のウィック押えの
代りに線径０．１ ｍｍのリン青銅からなるコイルを用
いたマイクロヒートバイブを作製した。On the other hand, as a conventional example, a micro heat vibrator was manufactured using a coil made of phosphor bronze with a wire diameter of 0.1 mm instead of the wick holder made of the above-mentioned shape memory alloy.
これらのヒートバイブについて加熱部１００ｍ。Heating section 100m for these heat vibes.
冷却部ｔｏａｍとして加熱部を加熱したときのヒートパ
イプ長さの温度分布を測定した。この結果を第５図に示
す０図から明らかなように加熱部付近においては、従来
のものは温度が高く、これより離れた冷却部においては
温度が低下する。これに対して本発明のものは加熱部に
おいて５０’Ｃより若干低めの温度を示し、冷却部にお
いては温度低下が従来のものより２〜３°Ｃ少ない。The temperature distribution of the length of the heat pipe was measured when the heating section was heated as the cooling section toam. As is clear from the results shown in FIG. 5, the temperature of the conventional type is high near the heating section, and the temperature decreases at the cooling section farther away. On the other hand, the device of the present invention exhibits a temperature slightly lower than 50'C in the heating section, and the temperature drop in the cooling section is 2 to 3 degrees Celsius less than that of the conventional device.
この程度の温度差がｔＣなどの冷却にとって実用上問題
になるところであり、本発明の効果は、極めて大きいこ
とが判った。A temperature difference of this magnitude is a practical problem for cooling at tC, etc., and it has been found that the effects of the present invention are extremely large.
以上に説明したように本発明によれば熱輸送特性および
長さ方向の熱輸送特性の均一なヒートバイブが得られる
もので工業上顕著な効果を奏するものである。As explained above, according to the present invention, it is possible to obtain a heat vibrator with uniform heat transport characteristics and heat transport characteristics in the longitudinal direction, which has a significant industrial effect.
第１図は本発明の一実施例を示すヒートバイブの断面図
、第２図および第３図は本発明の他の例を示すヒートバ
イブの斜視図、第４図は本発明に係るウィック押えの一
例を示す斜視図、第５図は本発明の一実施例に係るマイ
クロヒートパイプの長さと温度の関係を示す図である。
ｌ・・・ヒートバイブ容器、 ２・・・ウィック、
３・・・形状記憶合金コイル、 ４・・・形状記憶合
金多孔体、 ５・・・形状記憶合金多孔板、 ６・・・
作動液還流部、 ７・・・蒸気通路部、 ８・・・網状
円筒体。
第１図FIG. 1 is a sectional view of a heat vibrator showing one embodiment of the present invention, FIGS. 2 and 3 are perspective views of a heat vibrator showing other examples of the present invention, and FIG. 4 is a wick presser according to the present invention. FIG. 5, a perspective view showing an example, is a diagram showing the relationship between the length and temperature of a micro heat pipe according to an embodiment of the present invention. l... Heat vibe container, 2... Wick,
3...Shape memory alloy coil, 4...Shape memory alloy porous body, 5...Shape memory alloy porous plate, 6...
Working fluid reflux section, 7... Steam passage section, 8... Reticulated cylindrical body. Figure 1
Claims (2)
金からなるウイック押えを介在させ、該ウイック押えの
形状回復力によりウイックをヒートパイプ容器内壁に密
着させたことを特徴とするヒートパイプ。(1) A heat pipe characterized in that a wick holder made of a shape memory alloy is interposed together with the wick in the heat pipe container, and the wick is brought into close contact with the inner wall of the heat pipe container by the shape recovery force of the wick holder.
網状、多孔板状、または多孔筒状に成形したことを特徴
とする請求項１記載のヒートパイプ。(2) Coiled wick presser made of shape memory alloy,
The heat pipe according to claim 1, characterized in that it is formed into a net shape, a perforated plate shape, or a perforated cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63313482A JPH02157596A (en) | 1988-12-12 | 1988-12-12 | Heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63313482A JPH02157596A (en) | 1988-12-12 | 1988-12-12 | Heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02157596A true JPH02157596A (en) | 1990-06-18 |
Family
ID=18041839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63313482A Pending JPH02157596A (en) | 1988-12-12 | 1988-12-12 | Heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02157596A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100913358B1 (en) * | 2008-12-24 | 2009-08-20 | 주식회사 정진멀티테크놀로지 | Heat transmitting device with complex groove shaped capillary wick spring |
| JP2014114963A (en) * | 2012-12-06 | 2014-06-26 | Mitsubishi Electric Corp | Evaporator for loop type heat pipe for space |
| CN107543441A (en) * | 2017-08-31 | 2018-01-05 | 华南理工大学 | A kind of fiber sintering formula heat pipe manufacturing process core pipe positioning and extraction method |
-
1988
- 1988-12-12 JP JP63313482A patent/JPH02157596A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100913358B1 (en) * | 2008-12-24 | 2009-08-20 | 주식회사 정진멀티테크놀로지 | Heat transmitting device with complex groove shaped capillary wick spring |
| JP2014114963A (en) * | 2012-12-06 | 2014-06-26 | Mitsubishi Electric Corp | Evaporator for loop type heat pipe for space |
| CN107543441A (en) * | 2017-08-31 | 2018-01-05 | 华南理工大学 | A kind of fiber sintering formula heat pipe manufacturing process core pipe positioning and extraction method |
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