200949184 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種熱管，尤指一種具有雙毛細結構 的熱管及其製作方法。 【先前技術】 隨著電腦之中央處理器（QPU)的運算速度不斷提昇， ❹其所產生的發熱量亦越來越高，以往由鋁擠型散熱器及風 扇所組成的散熱裝置，已不能滿足目前之中央處理器的使 用需求’於是有業者陸續肖發出具有更高$熱效能的熱管 (heat pipe)，並將其與散熱器作組合，以有效地解決現階 段的散熱問題；然而，熱管内部的結構設計與工作流體多 寡，將關係到熱管之導熱速度及效能，當工作流體太多時 將造成熱管内部的氣體槽溝縮小，而大幅度的影響到導熱 效能，反之，當工作流體太少則易使熱管内部產生乾燒 © (dryout)現象，而使熱管損壞報廢；基於前述理由，本發 明人對熱管及其製作方法進行創新發明。 習知之具有雙毛細結構的熱管，如本國專利公開號 200626862所揭示’其主要包括一金屬管、一毛細結構及一 工作流體，其中該毛細結構包括沿金屬管徑向疊設之複數 層絲網，該複數層絲網包括沿金屬管圓周展開至少一呈平 面狀之絲網及一呈折狀之絲網，該折狀絲網於金屬管内形 成沿其軸向之流道，該工作流體則填注於該金屬管内部。 然而，習知之具有雙毛細結構的熱管，其毛細結構係 5 200949184 :面狀絲網及一折狀絲網所組合而成，在實際使用上 =有下述問題點’由於其毛細結構料賴，因此在結 把=Γ方面稍嫌不足’往往在熱管實際運作過程中產生 :月况而影響其導熱效能；另此等絲網之上、下皆為 •、糙面不論在氣體流通或液體回流，皆將造成相當程 擋作用’而令内部之流體不易達到高速移動及將熱 重▼離。 ❾ 此外刖述之公開案亦揭露熱管之製造方法，包括以 步驟f先提供至少一片狀之平面狀絲網及一片狀之折 :絲網；其次將絲網逐層捲成筒狀體；最後將上述筒狀體 入金屬&内。—般熱管的外緣直徑皆不大，欲將絲網型 4的毛細結構置人金屬f内部已相#的不容易，又要將此 組合毛細結構與金屬管内壁面相貼附接觸，如此更令熱管 的製作困難度提高，並導致熱管的製作良率居高不下 實有待加以改善者。 【發明内容】 故本發明之一目的，在於提供一種具有雙毛細結構的熱 &及其製作方法’藉由在金屬管之受熱部内部形成綿密毛 2結構，而在金屬管之其餘内部則形成有大容置空間的内 管及槽溝，不僅可避免熱管的乾燒（dry 〇ut)損壞，且具有 ，佳結構強度，以有效地防止毛細結構塌陷現象，而能提 兩熱管的導熱速度與效能，且可提昇熱管的製作良率。 為了達成上述之目的，本發明係提供一種具有雙毛細 6 200949184 結構的熱管，包括一金屬管、一第一毛細結構、—第二毛 細結構及一工作流體，該金屬管形成有一容腔及一受熱 ，該第毛細結構係以金屬粉末所燒結而成，且其係對 應該受熱部而設置在該容腔内；該第二毛細結構容置在該 容腔内並與該第一毛細結構之一端連接，且其具有一内管 及設於該内管與該金屬管内壁之間的一毛細組織；該工作 流體填注於該容腔内部。 ❹ 為了達成上述之目的，本發明係提供一種具有雙毛細 結構的熱管製作方法，其步驟包括： a) 提供一金屬管； b) 將一芯棒插入該金屬管中，於該芯棒外緣及該金 管内壁之間形成有一間隙； c) 將一金屬粉末填入該間隙内； d) 對該金屬粉末進行加溫燒結，於該金屬管内部形成 有一第一毛細結構； ® e)將該芯棒取出； f) Φζ供一第二毛細結構； g) 將該第二毛細結構置入該金屬管内部，並與該第一 毛細結構之一端連接；以及 ^ h)將一工作流體填入該金屬管内部，並對該金屬管進 行除氣及封口壓合。 【實施方式】 有關本發明之詳細說明及技術内容，配合圖式說明如 7 200949184 下，然而所附圖式僅提供參考與說明用，並非用來對本發 明加以限制者。 請參照第一、二及三圖所示’係分別為本發明熱管剖 面圖、第一圖之2-2剖面圖及第一圖之3-3剖面圖，本發 明係提供一種具有雙毛細結構的熱管（heat pipe)，主要包 括一金屬管10(Metal Tube)、一第一毛細結構 20(Capi 1 lary)、一 第二毛細結構 30(Capi 1 lary)及一工作流 ▲體40(Working Fluid)。其中在金屬管10内部具有一容腔 Ο 11 (Chamber)，並於金屬管10之底段形成有一受熱部 12(Heat-absorption Part)及頂段形成有一放熱部 13(Heat-dissipation Part)，其中受熱部12係用以與一電子 發熱元件8(如第九圖所示）作貼附接觸，而放熱部13則供 散熱鰭片組7(如第九圖所示）套接。第一毛細結構20係以 金屬粉末所燒結（Sintering)而成，且其係對應於前述之受 熱部12而設置在容腔11内部。第二毛細結構3〇具有一内管 © 31及設於内管31與金屬管10内壁之間的一毛細組織，此内 管31之内壁為光滑表面，而本實施例的毛細組織係由從内 管31之外周緣延伸出的複數凸條32、及形成於任二相鄰凸 條32之間的一槽溝A(Channel)所構成；此等凸條32係與内 管31之軸心線相互平行。第二毛細結構別係置設在金屬管 10之容腔11内並與第一毛細結構2〇之一端相互貼附連接； 且内管31之軸心線係與金屬管1〇之軸心線相互平行；工作 流體40係填注於容腔11内部。 請參照第四至八圖所不，係分別為本發明熱管之製作 200949184 流程圖及各剖面圖’其方法步驟包括： a)提供一金屬管1〇(如第五 此金屬管K)係可為鋼等導、散熱:’在此步驟中， 其形狀係可為圓形或其他各種不同料：：成，且 之内壁係為光滑表面’係可以—成型治：二金屬管Π) 糊之底端進行縮口加工、或以谭接： = = 金屬管10之底端進行焊接封口加工。接裝置（圖未不）對 ❹ W將-芯棒5插入該金屬管1〇中，於該 ，金屬管H)内壁之間形成有一間隙51(如第：T及 寸的奸入V 寸小於金屬管10之内周緣尺 ^ ，藉以在芯棒5外周緣及金屬管1〇 之間形成有-間隙51。 詎屬吕10内周壁 〇將-金屬粉末填入該間隙51内（如第六圖所示），· 驟中此金屬粉末的置入量係小於前述間隙Μ容積 、-半’且被金屬粉末所填注之區域係形成為熱管的一受 ©熱部12’本實施例之金屬粉末填入金屬管1〇之高度為略大 於受熱部12之長度。 d) 對該金屬粉末進行加溫燒結，於該金屬㈣内部形 成有-第-毛細結構2〇 ;在此步驟中，係以加溫燒結 (Sintering)製程對填入的金屬粉末進行燒結，而於金屬管 10下方處内壁形成有一圓環形第一毛細結構20。 e) 將該芯棒5取出；在此步驟中，係可左、右搖晃此 芯棒5 ’而使第-毛細結構2〇與芯棒5產生鬆動現象，再 將心棒5從金屬管1〇中取出；如此，可在受熱部a之内部 9 200949184 形成一中空狀。 f) 提供一第二毛細結構3〇(如第七圖所示）；在此步 驟中，第二毛細結構30具有一内管31及設於内管31與金屬 :10内壁之間的一毛細組織，而本實施例的毛細組織係由 從内管31之外周緣延伸出的複數凸條32、及形成於任二相 鄰凸條32之間的一槽溝A(Channel)所構成。 g) 將該第二毛細結構30置入該金屬管1〇内部，並與該 ❹第一毛細結構20之一端連接；在此步驟中，係將第二毛細 結構30穿入金屬管1〇内，且第二毛細結構3〇之底端係與前 述第一毛細結構20之頂端相互貼附接觸（如第八圖所 示）。 ^ h)將一工作流體40填入該金屬管10内部，並對該金屬 s 10進行除氣及封口壓合；在此步驟中，係可將金屬管1〇 呈直立狀或傾斜狀擺設，再將純水等工作流體仙填入金屬 管10之容腔U内部（如第八圖所示）。其次以加溫等除氣 ❾裝置將金屬管10内部的氣體排出，再對金屬管1〇之開口端 進行封口壓合。 凊參照第九圓所示，係本發明熱管應用電子發熱元件 使用狀態圖’該放熱部13係可供一散熱鰭片組7套接，此 散熱鰭片組7係由多數散熱鰭片71所相互疊接組成，受熱 部12則與-電子發熱元件8相互貼附接觸，此電子發熱元 件8運作後將產生向熱量，此熱量將令工作流體肋產生汽 化’此汽化流體因相變化產生潛熱而帶走大量的熱量，此 熱量將從受熱部12沿著第二毛細結構別之内管31的中心處 10 200949184 高速移動至放熱部13，利用前述散熱鰭片組7的散熱作 用，將使此等汽化流體被冷凝成液體，並藉由氣體高低屢 差效應或重力作用，通過各槽溝4再流回到第—毛細結構 20處’藉由第—毛細結構20的毛細作用力，而使冷凝液體 回，到熱管與電子發熱元件8相互貼接—端，如此以構成 熱官之連續循環運作。200949184 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a heat pipe, and more particularly to a heat pipe having a double capillary structure and a method of fabricating the same. [Prior Art] As the computing speed of the central processing unit (QPU) of the computer continues to increase, the heat generated by the computer is also getting higher and higher. In the past, the heat sink composed of the aluminum extruded radiator and the fan cannot be used. To meet the current needs of the central processor's use, 'There are manufacturers who have issued a heat pipe with higher heat efficiency and combined it with the heat sink to effectively solve the current heat dissipation problem; however, The structural design and working fluid inside the heat pipe will be related to the heat transfer speed and efficiency of the heat pipe. When the working fluid is too much, the gas groove inside the heat pipe will shrink, which will greatly affect the heat conduction performance. Too little is easy to cause dry-drying inside the heat pipe, and the heat pipe is damaged and scrapped; for the foregoing reasons, the inventors made innovative inventions for the heat pipe and its manufacturing method. A heat pipe having a double capillary structure, as disclosed in Japanese Patent Publication No. 200626862, which mainly comprises a metal pipe, a capillary structure and a working fluid, wherein the capillary structure comprises a plurality of layers of wire meshed radially along the metal pipe. The plurality of layers of the screen comprise at least one planar screen and a folded screen along the circumference of the metal tube, the folded screen forming a flow path along the axial direction thereof in the metal tube, the working fluid Fill in the inside of the metal tube. However, the conventional heat pipe having a double capillary structure has a capillary structure of 5 200949184: a combination of a planar wire mesh and a folded wire mesh, and in practical use, there is the following problem] due to its capillary structure Therefore, in the case of knotting = Γ is a little inadequate 'often in the actual operation of the heat pipe: the monthly conditions affect its thermal conductivity; the other above and below the mesh are •, rough surface in the gas circulation or liquid Reflow, will cause a considerable range of functions' and make the internal fluid difficult to achieve high-speed movement and heat weight. ❾ The disclosure also discloses a method for manufacturing a heat pipe, comprising first providing at least one piece of planar wire mesh and a piece of folding in the step f: a wire mesh; secondly, rolling the wire mesh into a cylindrical body layer by layer Finally, the above cylindrical body is placed into the metal & The diameter of the outer edge of the heat pipe is not large. It is not easy to place the capillary structure of the wire mesh type 4 into the inner phase of the metal f. It is also necessary to attach the combined capillary structure to the inner wall surface of the metal pipe. The difficulty in the production of heat pipes has increased, and the production yield of heat pipes has remained high. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a heat & having a double capillary structure and a method of making the same by forming a dense wool 2 structure inside the heated portion of the metal tube, and in the remaining interior of the metal tube The inner tube and the groove formed with a large accommodating space can not only avoid the dry 〇ut damage of the heat pipe, but also have good structural strength to effectively prevent the collapse of the capillary structure, and can improve the heat conduction of the two heat pipes. Speed and performance, and can improve the production yield of heat pipes. In order to achieve the above object, the present invention provides a heat pipe having a double capillary 6 200949184 structure, comprising a metal pipe, a first capillary structure, a second capillary structure and a working fluid, the metal pipe forming a cavity and a Heated, the first capillary structure is sintered by metal powder, and is disposed in the cavity corresponding to the heat receiving portion; the second capillary structure is accommodated in the cavity and associated with the first capillary structure One end is connected, and has an inner tube and a capillary structure disposed between the inner tube and the inner wall of the metal tube; the working fluid is filled inside the chamber. ❹ In order to achieve the above object, the present invention provides a heat pipe manufacturing method having a double capillary structure, the steps comprising: a) providing a metal pipe; b) inserting a core rod into the metal pipe at the outer edge of the mandrel And forming a gap between the inner wall of the gold tube; c) filling a metal powder into the gap; d) heating and sintering the metal powder, forming a first capillary structure inside the metal tube; The mandrel is taken out; f) Φ is supplied to a second capillary structure; g) the second capillary structure is placed inside the metal tube and connected to one end of the first capillary structure; and ^h) a working fluid is filled in The inside of the metal tube is degassed and sealed by the metal tube. DETAILED DESCRIPTION OF THE INVENTION The detailed description and technical content of the present invention are set forth in the accompanying drawings. Please refer to the first, second and third figures respectively for the heat pipe sectional view of the present invention, the 2-2 sectional view of the first drawing and the 3-3 sectional view of the first drawing. The present invention provides a double capillary structure. The heat pipe mainly comprises a metal tube 10 (Metal Tube), a first capillary structure 20 (Capi 1 lary), a second capillary structure 30 (Capi 1 lary) and a working stream ▲ body 40 (Working Fluid). The inside of the metal pipe 10 has a cavity Ο 11 (Chamber), and a heat-absorbing portion 12 is formed on the bottom portion of the metal pipe 10 and a heat-dissipation portion 13 is formed on the top portion. The heat receiving portion 12 is for attaching contact with an electronic heating element 8 (as shown in FIG. 9), and the heat releasing portion 13 is for socketing of the heat dissipating fin group 7 (shown in FIG. 9). The first capillary structure 20 is formed by sintering a metal powder, and is provided inside the cavity 11 corresponding to the heat receiving portion 12 described above. The second capillary structure 3 has an inner tube © 31 and a capillary structure disposed between the inner tube 31 and the inner wall of the metal tube 10. The inner wall of the inner tube 31 is a smooth surface, and the capillary structure of the present embodiment is The plurality of ribs 32 extending from the outer periphery of the inner tube 31 and a groove A formed between any two adjacent ribs 32; the ribs 32 are aligned with the axis of the inner tube 31 The lines are parallel to each other. The second capillary structure is disposed in the cavity 11 of the metal tube 10 and is attached to one end of the first capillary structure 2; and the axial line of the inner tube 31 and the axial line of the metal tube 1〇 Parallel to each other; the working fluid 40 is filled inside the cavity 11. Please refer to Figures 4 to 8 for the fabrication of the heat pipe of the present invention. 200949184 Flowchart and various cross-sectional views' The method steps include: a) providing a metal pipe 1 (such as the fifth metal pipe K) For steel, etc., heat dissipation: 'In this step, the shape can be round or other various materials:: into, and the inner wall is a smooth surface' can be - forming treatment: two metal tube Π) paste The bottom end is crimped or tanned: = = the bottom end of the metal tube 10 is welded and sealed. The connecting device (not shown) inserts the mandrel 5 into the metal tube 1 , and a gap 51 is formed between the inner walls of the metal tube H) (eg, the T: inch and the inch V is less than The inner circumference of the metal pipe 10 is formed to have a gap 51 between the outer periphery of the mandrel 5 and the metal pipe 1〇. The inner wall of the genus Lu 10 is filled with metal powder into the gap 51 (such as the sixth In the drawing, the amount of the metal powder is less than the gap volume, and the area filled with the metal powder is formed as a heat receiving portion 12' of the heat pipe. The height of the metal powder filled into the metal pipe 1 is slightly larger than the length of the heat receiving portion 12. d) the metal powder is heated and sintered, and a - capillary structure 2 is formed inside the metal (4); in this step, The filled metal powder is sintered by a Sintering process, and an annular first capillary structure 20 is formed on the inner wall below the metal pipe 10. e) taking out the mandrel 5; in this step, the mandrel 5' can be shaken left and right to loosen the first capillary structure 2〇 and the mandrel 5, and then the mandrel 5 is removed from the metal pipe 1 Take out; in this way, a hollow shape can be formed in the interior 9 200949184 of the heat receiving portion a. f) providing a second capillary structure 3 (as shown in the seventh figure); in this step, the second capillary structure 30 has an inner tube 31 and a capillary disposed between the inner tube 31 and the inner wall of the metal: 10 The tissue of the present embodiment is composed of a plurality of ribs 32 extending from the outer periphery of the inner tube 31 and a groove A formed between any two adjacent ribs 32. g) placing the second capillary structure 30 into the inside of the metal tube 1〇 and connecting with one end of the first capillary structure 20; in this step, the second capillary structure 30 is inserted into the metal tube 1〇 And the bottom end of the second capillary structure 3 is in contact with the top end of the first capillary structure 20 (as shown in FIG. 8). ^ h) filling a working fluid 40 into the inside of the metal pipe 10, and degassing and sealing the metal s 10; in this step, the metal pipe 1 〇 can be placed in an upright or inclined manner. The working fluid such as pure water is filled into the cavity U of the metal pipe 10 (as shown in the eighth drawing). Next, the gas inside the metal pipe 10 is discharged by a degassing device such as heating, and the open end of the metal pipe 1 is sealed and pressed. Referring to the ninth circle, the heat pipe is used in the heat pipe of the present invention. The heat radiating portion 13 is sleeved by a heat sink fin group 7 which is composed of a plurality of heat radiating fins 71. The heat-receiving portion 12 is in contact with the electronic heating element 8 , and the electronic heating element 8 will generate heat to the working fluid ribs. A large amount of heat is taken away, and the heat is moved from the heat receiving portion 12 to the heat radiating portion 13 at a high speed along the center of the inner tube 31 of the second capillary structure 10 200949184, and the heat radiating action of the heat radiating fin group 7 is utilized. The vaporization fluid is condensed into a liquid, and is recirculated back to the first capillary structure 20 through the grooves 4 by the high or low gas effect or gravity, so that the capillary force of the first capillary structure 20 is The condensed liquid is returned to the end of the heat pipe and the electronic heating element 8 so as to constitute a continuous cycle of the heat officer.
❹ 請參照第十圖所示，係本發明熱管另一實施例剖面 ^ ’本發明之熱管除了可為上述實施例外，其第二毛細結 =30之毛細組織係由從金屬管1〇之内壁延伸出的複數分隔 、及形成於任二相鄰分隔條14之間的一槽溝a所構 成，如此，亦具有前述實施例之等同效果。 綜上所述 田炉不赞阳之具有雙毛細結構的熱管及J 衣作方法已具有產㈣職、新穎性與進步性，又本發日 2造亦未f見於_產品及公開制，完全符合發明^ 利申4要件，爰依專利法提出申請。 【圖式簡單說明】 第一圖係本發明熱管剖面圖。 第二圖係第一圖之2-2剖面圖。 第三圖係第一圖之3-3剖面圖。 第四圖係本發明熱管之製作流程圖。 第五圖係、本發明之芯棒插入金屬管剖面圖。 =六圖係、本發明之金屬粉末填入金屬管剖面圖。 第七圖係本發明之第：毛細結構未置人金屬管立體 200949184 圖。 第八圖 係本發明熱管之局部剖面圖。 第九圖係本發明熱管應用電子發熱元件使用狀態圖。 第十圖 係本發明熱管另一實施例剖面圖。 【主要元件符號說明】 <本發明> I 金屬管10 容腔11 受熱部12 放熱部13 分隔條14 第一毛細結構20 第二毛細結構30 内管31 凸條32 工作流體40 芯棒5 G 間隙51❹ Referring to the tenth figure, another embodiment of the heat pipe of the present invention is a section of the heat pipe of the present invention, except for the above-mentioned embodiment, wherein the capillary structure of the second capillary knot = 30 is from the inner wall of the metal pipe 1 The plurality of extended partitions and a groove a formed between any two adjacent partitions 14 have the same effect as the foregoing embodiment. In summary, the heat pipe and J-coating method of the double-wool structure of Tianchang Buzanyang have already produced (four) job, novelty and progress, and this day is not seen in the product and the public system, completely In accordance with the invention ^ Li Shen 4 elements, filed according to the patent law. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a cross-sectional view of a heat pipe of the present invention. The second figure is a cross-sectional view of 2-2 of the first figure. The third figure is a sectional view of 3-3 of the first figure. The fourth figure is a flow chart for the manufacture of the heat pipe of the present invention. Figure 5 is a cross-sectional view of the mandrel inserted into the metal tube of the present invention. = Six figure system, the metal powder of the present invention is filled into a metal pipe sectional view. The seventh figure is the first aspect of the present invention: the capillary structure is not placed in a three-dimensional metal tube 200949184. Figure 8 is a partial cross-sectional view of the heat pipe of the present invention. The ninth drawing is a diagram showing the state of use of the electronic heating element for the heat pipe application of the present invention. Figure 10 is a cross-sectional view showing another embodiment of the heat pipe of the present invention. [Description of main component symbols] <Invention> I Metal tube 10 Cavity 11 Heat receiving portion 12 Heat releasing portion 13 Separating strip 14 First capillary structure 20 Second capillary structure 30 Inner tube 31 Bump 32 Working fluid 40 Mandrel 5 G gap 51
導熱板6 散熱鰭片組7 散熱鰭片71 電子發熱元件8 槽溝A 步驟a、b、c、d、e、f、g、h 12Thermal Conductive Plate 6 Heat Sink Set 7 Heat Sink 71 Electronic Heating Element 8 Groove A Steps a, b, c, d, e, f, g, h 12