JPS5833476B2 - Heat pipe manufacturing method - Google Patents
Heat pipe manufacturing methodInfo
- Publication number
- JPS5833476B2 JPS5833476B2 JP9828877A JP9828877A JPS5833476B2 JP S5833476 B2 JPS5833476 B2 JP S5833476B2 JP 9828877 A JP9828877 A JP 9828877A JP 9828877 A JP9828877 A JP 9828877A JP S5833476 B2 JPS5833476 B2 JP S5833476B2
- Authority
- JP
- Japan
- Prior art keywords
- heat pipe
- hollow tube
- condensable gas
- working fluid
- opening
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title description 5
- 239000012530 fluid Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 15
- 238000007872 degassing Methods 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
本発明はヒートパイプの製造方法、特にヒートパイプ内
への作動液の充填方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a heat pipe, and particularly to a method for filling a heat pipe with a working fluid.
従来、ヒートパイプに作動液を充填する方法としては第
１図に示すように、バルブ１を閉じた状態で、予め脱気
装置２で脱気された作動液３を液溜部４に入れておき、
ヒートパイプ用中空管体５内の空気をバルブ６を開いて
、真空ポンプ７により所望の真空度に真空引きした後、
バルブ６を閉じ、バルブ１を開くことにより、所定量の
作動液をヒートパイプ用中空管体５内に充填した後、こ
の中空管体５の開口部であるノズル８を密封切断してい
る。Conventionally, as shown in FIG. 1, a method of filling a heat pipe with a working fluid is to fill a liquid reservoir 4 with a working fluid 3 that has been previously degassed in a deaerator 2 with a valve 1 closed. Ok,
After opening the valve 6 and evacuating the air in the heat pipe hollow tube body 5 to a desired degree of vacuum with the vacuum pump 7,
After filling a predetermined amount of working fluid into the heat pipe hollow tube 5 by closing the valve 6 and opening the valve 1, the nozzle 8, which is the opening of the hollow tube 5, is sealed and cut. There is.
このような方法では、予め、所望真空度にしたヒートパ
イプ用中空管体５内に充填する作動液の計量はバルブ１
の操作により行うので、所定量を正確に充填するのがか
なり難しいこと、及び充填する作動液の脱ガスを行う大
がかりの脱気装置２（例えば真空排気法による真空排気
装置）を要し、経済性に欠けるという欠点があった。In such a method, the amount of hydraulic fluid to be filled into the heat pipe hollow tube body 5 which has been set to a desired degree of vacuum in advance is measured by the valve 1.
It is quite difficult to fill the predetermined amount accurately, and it requires a large-scale degassing device 2 (e.g., a vacuum pumping device using a vacuum pumping method) to degas the hydraulic fluid to be filled, making it uneconomical. It had the disadvantage of lacking sex.
また、前述の方法に比べて作動液量の正確な充填ができ
、且つ、作動液の特別な脱ガス装置を必要としない方法
として、ヒートパイプ用中空管体内を真空にする前に作
動液を注入し真空引きすることにより作動液が蒸発して
減少するのを防ぐため、この作動液を凍結させた後、真
空引きを行い、このヒートパイプ用中空管体を密封する
方法が提案されている。In addition, as a method that allows more accurate filling of the amount of working fluid than the above-mentioned method and does not require a special degassing device for the working fluid, the working fluid is In order to prevent the working fluid from evaporating and decreasing by injecting it and pulling a vacuum, a method has been proposed in which the working fluid is frozen, then vacuum is pulled, and the hollow tubular body for the heat pipe is sealed. ing.
この方法の特長には正確な作動液量の充填ができ、且つ
、この中空管体内の脱気真空を十分に行い得ると述べら
れている。It is stated that the advantages of this method are that it is possible to fill an accurate amount of working fluid, and that it is possible to sufficiently degas and vacuum the inside of this hollow tube.
この方法は確かに、正確な・作動液の充填ができ、且つ
、ヒートパイプ用中空管体内の脱気真空が十分に行える
ので、前述の方法に比べ、作動液の脱ガス装置を要しな
いユニークな方法であるが高性能のヒートパイプを製造
するには、この方法はヒートパイプ用中空管体内を真空
引きする前に作動液を凍結させるため、作動液を凍結さ
せる時点にヒートパイプ用中空管体内の空気を抱き込み
、この凍結した作動液内の空気は、どのようにヒートパ
イプ用中空管体内を高真空にしても、短時間に脱気し得
ず、この凍結した作動液内の空気を完全に脱気するには
、長時間高真空を維持する必要があり、実用に供しえな
いという欠点を有していた。This method does not require a hydraulic fluid degassing device compared to the above-mentioned method because it allows accurate filling of the working fluid and sufficient degassing and vacuum inside the hollow tube for the heat pipe. This is a unique method for manufacturing high-performance heat pipes. This method freezes the working fluid before vacuuming the inside of the heat pipe hollow tube. No matter how you create a high vacuum inside the hollow tube for heat pipes, the air in this frozen working fluid cannot be degassed in a short time, and the frozen working fluid In order to completely degas the air in the liquid, it is necessary to maintain a high vacuum for a long time, which has the disadvantage of impractical use.
本発明は上述した従来の問題点に鑑みなされたもので、
ヒートパイプ用中空管体の開口部と真空排気系との連結
部の開閉バルブ間に非凝縮性ガス溜を設け、予め、この
ヒートパイプ用中空管体内に所定量または所定量より僅
か多めに作動液を注入し、この作動液を凝固させた後、
このヒートパイプ用中空管体内を真空排気することによ
り脱気し、次いで、この非凝縮性ガス溜と真空排気系連
結部の開閉バルブを閉じ、この真空状態を保持した状態
で加熱することにより作動液を融解させさらに、このヒ
ートパイプを所望動作温度で動作させ作動液を凝固させ
る時に抱き込んだ微量の非凝縮性ガスをこの非凝縮性ガ
ス溜に追い出した後、このヒートパイプの開口部を密封
するようにしたものである。The present invention was made in view of the above-mentioned conventional problems.
A non-condensable gas reservoir is provided between the opening of the hollow tube for a heat pipe and the opening/closing valve of the connection part with the vacuum exhaust system, and a predetermined amount or slightly more than the predetermined amount is injected into the hollow tube for the heat pipe in advance. After injecting hydraulic fluid into and solidifying this hydraulic fluid,
The interior of the hollow tube for the heat pipe is evacuated to degas it, then the opening/closing valve between the non-condensable gas reservoir and the vacuum exhaust system is closed, and heating is performed while maintaining this vacuum state. After melting the working fluid and expelling a small amount of non-condensable gas trapped when the heat pipe is operated at a desired operating temperature to solidify the working fluid into the non-condensable gas reservoir, the opening of the heat pipe is It is designed to be sealed.
以下本発明を一実施例により詳細に説明する。The present invention will be explained in detail below using one example.
実施例に使用したヒートパイプは外径１２．７ｍｗ、有
効長２５０ｉｘｍの純銅よりなるコンテナ内壁に密着し
て毛細管作用を有する純銅の金属細線群よりなるウィッ
クを設け、このウィック内には蒸気通路を構成し、管端
の一方をシールし他端の開口部には作動液注入及び真空
排気を行うノズルを取付けた構造となっている。The heat pipe used in the example has an outer diameter of 12.7 mw and an effective length of 250 ixm, and is equipped with a wick made of a group of fine pure copper metal wires that closely adheres to the inner wall of a container made of pure copper and has a capillary action, and a steam passage is provided in this wick. One end of the tube is sealed, and the opening at the other end is equipped with a nozzle for injecting working fluid and evacuation.
そして第２図に示すように真空排気系開閉バルブ６と前
記ヒートパイプ用中空管体ノズル取付部９間に非凝縮性
ガス溜１０を設けた装置を用い、上述のヒートパイプ用
中空管体５内に５．２５ ｅｅの蒸留水を注入した後、
このヒートパイプ用中空管体５の開口部であるノズル８
をノズル取付部９にて取付けた後、このヒートパイプ用
中空管体５を一７５℃で冷却し、蒸留水を凝固させ、こ
のヒートパイプ用中空管体５内を真空ポンプ７で２ Ｘ
１０−５ＮｔＨｇに真空引きした後真空排気系開閉バ
ルブ６を閉じ、さらに６０℃で加熱し、蒸溜水を融解さ
せて、凝固時に抱き込んだ微量の非凝縮性ガスを吐出し
、且つヒートパイプを同温度で動作させることにより、
この非凝縮性ガスを内容積４０ｃｃを有する非凝縮性ガ
ス溜１０に追い出した後、開口部であるノズル８を圧潰
、溶接し密封してヒートパイプとした。As shown in FIG. 2, a device in which a non-condensable gas reservoir 10 is provided between the evacuation system on-off valve 6 and the heat pipe hollow tube body nozzle attachment part 9 is used, and the above-mentioned hollow tube for heat pipe is After injecting 5.25 ee of distilled water into the body 5,
Nozzle 8 which is the opening of this hollow tube body 5 for heat pipe
is attached to the nozzle attachment part 9, the heat pipe hollow tube body 5 is cooled to -75° C., the distilled water is solidified, and the inside of the heat pipe hollow tube body 5 is heated with a vacuum pump 7. X
After evacuation to 10-5 NtHg, the evacuation system on-off valve 6 was closed, and further heated at 60°C to melt the distilled water and discharge a small amount of non-condensable gas trapped during solidification. By operating at the same temperature,
After expelling this non-condensable gas into a non-condensable gas reservoir 10 having an internal volume of 40 cc, the opening nozzle 8 was crushed and sealed by welding to form a heat pipe.
そして、このヒートパイプの一端５０ｍｍを１００℃に
加熱し、温度分布を測定した結果、第３図の■に示すよ
うに、加熱部Ａ、Ｂに対する先端部Ｃ，Ｄ、Ｅ。Then, 50 mm of one end of this heat pipe was heated to 100° C., and the temperature distribution was measured. As shown in FIG.
Ｆ、Ｇの温度降下は１．５℃と極めて少なく、良好な伝
熱特性を示し、非凝縮性ガスが完全に排出されているこ
とが判る。It can be seen that the temperature drop in F and G was extremely small at 1.5°C, indicating good heat transfer characteristics, and that non-condensable gas was completely exhausted.
なお、作動液の減少量については、注入量５．２５ｅｅ
に対して０．２ ＣＣの減少で注入量に対し３．８％と
殆んど問題とならない値であった。In addition, regarding the amount of decrease in hydraulic fluid, the injection amount is 5.25ee.
The decrease of 0.2 CC was 3.8% of the injection amount, which was a value that hardly caused any problem.
ただし、この減少分を予め補正して多めに注入しておけ
ば所望量の作動液を封入することができる。However, if this decrease is corrected in advance and a larger amount is injected, the desired amount of hydraulic fluid can be sealed.
参考例として、同等のヒートパイプ用中空管体を用い、
この中空管体内に５．２５ＣＣの蒸溜水を注入した後、
このヒートパイプ用中空管体の開口部であるノズルを真
空排気系に取付けた後、−７５℃で冷却し、蒸溜水を凍
結させ、このヒートパイプ用中空管体内を２ Ｘ １０
−５ｍｍＨｇに真空引きし脱気を行い、ノズルを圧潰、
溶接して密封したヒートパイプを実施例の場合と同様そ
の一端５０順を１００℃に加熱し、温度分布を測定した
結果は第３図のＨに示すように、加熱部に対する先端部
の温度降下は７℃と極めて大きく、ヒートパイプ内に非
凝性ガスが残存していることが判る。As a reference example, using an equivalent hollow tube body for a heat pipe,
After injecting 5.25cc of distilled water into this hollow tube,
After attaching the nozzle, which is the opening of this hollow tube for a heat pipe, to a vacuum exhaust system, it was cooled at -75°C to freeze the distilled water, and the inside of this hollow tube for a heat pipe was 2×10
- Vacuum to 5mmHg to degas, crush the nozzle,
One end of the welded and sealed heat pipe was heated to 100°C in the same way as in the example, and the temperature distribution was measured. As shown in H in Figure 3, the temperature drop at the tip with respect to the heated part The temperature was extremely large at 7°C, indicating that non-condensable gas remained inside the heat pipe.
以上、説明したように、本発明によれば、正確な作動液
の封入ができる他、ヒートパイプ内の非凝縮性ガスの脱
気が完全にできる。As described above, according to the present invention, not only can the working fluid be accurately sealed, but also the non-condensable gas in the heat pipe can be completely degassed.
その上、作動液の脱気を行う特別な装置を要せず、容易
に高性能のヒートパイプを製造できる等、高性能のヒー
トパイプが安価で容易に得られる効果がある。Furthermore, there is an effect that a high-performance heat pipe can be easily obtained at low cost, such as that a high-performance heat pipe can be easily manufactured without requiring a special device for degassing the working fluid.
第１図は従来によるヒートパイプの製造方法を示す説明
図、第２図は本発明ヒートパイプの製造方法を示す説明
図、第３図は本発明方法及び従来法により製造したヒー
トパイプの温度分布特性の比較図である。
１・・・・・・バルブ、２・・・・・・脱気装置、３・
・・・・・作動液、４・・・・・・液溜部、５・・・・
・・ヒートパイプ用中空管体、６−・・・・・バルブ、
７・・・・・・真空ポンプ、８・・・・・・ノズル、９
・・−・・・ヒートパイプ取付部、１０・・・・・・非
凝縮性ガス溜。FIG. 1 is an explanatory diagram showing a conventional method for manufacturing a heat pipe, FIG. 2 is an explanatory diagram showing a method for manufacturing a heat pipe according to the present invention, and FIG. 3 is a temperature distribution of heat pipes manufactured by the method according to the present invention and the conventional method. It is a comparison diagram of characteristics. 1... Valve, 2... Deaerator, 3.
...Hydraulic fluid, 4...Liquid reservoir, 5...
・Hollow tube body for heat pipe, 6-・・・Valve,
7...Vacuum pump, 8...Nozzle, 9
...... Heat pipe attachment part, 10... Non-condensable gas reservoir.
Claims (1)
部の開閉バルブ間に非凝縮性ガス溜を設け、予めこのヒ
ートパイプ用中空管体内に所定量または所定量より僅か
多めの作動液を注入し、この作動液を凝固させた後、こ
のヒートパイプ用中空管体内を真空排気することにより
脱気し、次いで、この非凝縮性ガス溜と真空排気系連結
部の開閉バルブを閉じた後、この真空状態を保持した状
態で加熱することにより作動液を融解させ、さらに、こ
のヒートパイプを所望動作温度で動作させ、作動液を凝
固させる時に抱き込んだ微量の非凝縮性ガスを、この非
凝縮性ガス溜に追い出した後、このヒートパイプの開口
部を密封することを特徴とするヒートパイプの製造方法
。1. A non-condensable gas reservoir is provided between the opening of the hollow heat pipe body and the opening/closing valve of the vacuum exhaust system connection part, and a predetermined amount or slightly more than the prescribed amount is generated in the heat pipe hollow tube body in advance. After injecting the liquid and solidifying the working liquid, the inside of the hollow tube for the heat pipe is degassed by evacuation, and then the on-off valve between the non-condensable gas reservoir and the evacuation system is connected. After closing, the working fluid is melted by heating while maintaining this vacuum state, and the heat pipe is then operated at the desired operating temperature to remove the trace amount of non-condensable gas trapped when the working fluid is solidified. is expelled into the non-condensable gas reservoir, and then the opening of the heat pipe is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9828877A JPS5833476B2 (en) | 1977-08-18 | 1977-08-18 | Heat pipe manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9828877A JPS5833476B2 (en) | 1977-08-18 | 1977-08-18 | Heat pipe manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5432856A JPS5432856A (en) | 1979-03-10 |
| JPS5833476B2 true JPS5833476B2 (en) | 1983-07-20 |
Family
ID=14215729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9828877A Expired JPS5833476B2 (en) | 1977-08-18 | 1977-08-18 | Heat pipe manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833476B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62161683U (en) * | 1986-04-04 | 1987-10-14 |
-
1977
- 1977-08-18 JP JP9828877A patent/JPS5833476B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62161683U (en) * | 1986-04-04 | 1987-10-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5432856A (en) | 1979-03-10 |
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