1289654 t * 韆* 九、發明說明： 【發明所屬之技術領域】 _ 本發明涉及―種傳熱裝置，特別係指-種複合式熱管。 【先前技術】 熱管具有超靜音、高熱傳導率、重量輕、尺寸小、無 可動件、結構簡單及多用途等特性而被廣泛應用，其基本 構造係在密閉管材内壁設置易吸收作動流體之毛細結構 |層，而其中央空間則為空胴體狀態，並在抽真空之密閉管 材内注入相當於毛細結構層孔隙總容積之作動流體。目前 使用^細結構有如粉末燒結式、溝槽式、纖維式或編織 周式等單型式’但單__型式毛細結構之熱管折彎壓扁後 其蒸汽流道將變得不順暢及其毛細結構也將遭到破壞，溝 槽式熱管尤為嚴重，其性能會大幅度降低。為解決以上問 _ e t界在熱中採用複合式熱管，比如將溝槽式毛 構…為織網毛細結構相結合，如圖i所示，其在溝槽式 2細結構之熱管内添加—浮動之編織網式毛細結構，以改 聋槽式熱官在折彎虔扁時毛細〶構衫整之缺點及增加 在、商冬特丨生但由於所添加之編織式毛細結構無法固定 ^ 置因此該浮動之編織式毛細結構反而造成蒸汽 =之不順暢'，進而導致熱量無法得到有效傳輸。由實驗 時，埶―*此;予動編織式毛細結構任意安置在熱管中 &±產良^率低同時造成電子元件之散熱效果不 6 .1289654 佳’進而影響電子元件之使用壽命，尤其在熱管折彎壓爲 後’其最大熱傳量將降低50%以上。 【發明内容】 有馨於此，有必要提供一 之複合式熱管及其製造方法。 種具有穩定及高效傳熱性能 種複口式熱管製造方法，包括以下步驟：a)提供一 表面具有凹槽之中心棒；b)㈣—毛細結構，將其置ς該 修中〜棒之凹槽中；c)提供一金屬管體，將帶有該毛細結構 之中心棒置於該金屬殼體内；d) I另—毛細結構原料填充 於中心棒與殼體間之間_ ;e)高溫燒結該殼體直至兩種 毛細結構燒結成-體；f)抽離中心棒；g)㈣殼體進行焊 尾、縮管、注液、抽真空、封口。 一種複合式熱管製造方法，包括以下步驟：a)提供一 表面具有凹槽之中心、棒；b)提供—毛細結構，將其置於該 φ中:棒之凹槽中；c)提供一内壁附有溝槽式毛細結構之金 屬笞體，將V有毛細結構之中心棒置於該金屬殼體内；句 高溫燒結該殼體直至兩種毛細結構燒結成一體；e)抽離中 、、棒，f)對該设體進行焊尾、縮管、注液、抽真空、封口。 種複合式熱管，包括一密封中空殼體，該殼體内形 成一沿該熱管延伸方向設置之蒸汽流道，其内裝設有適量 工作液體，該殼體内壁上貼附有一第一毛細結構，一第二 毛細結構燒結結合於該第一毛細結構内表面上。 上述複合式熱管藉由在製造過程中於中心棒上開設凹 1289654 • * — 槽，使得熱管中毛細結構具有相對固定位置以不影響蒸汽 - 在流道内之傳輸，且在經過折彎壓扁後熱管之蒸汽流道仍 能保持順暢和毛細結構完整，有利於結合兩種毛細結構特 性更快速地傳輸工作液體。 下面參照附圖，結合具體實施例對本發明作進一步之 描述。 【實施方式】 φ 請參閱圖2及圖3，為本發明實施例一複合式熱管10之 縱向及橫向截面圖。該熱管10呈U形彎曲，其橫向截面為矩 形，該熱管10包括一空心殼體120，該空心殼體120内壁上 貼附有一燒結式第一毛細結構140,熱管10内第一毛細結構 140靠近管體外彎侧之内表面上，設有一沿該熱管10延伸方 向設置之凹槽142, 一纖維式第二毛細結構160收容於該凹 槽142中並與第一毛細結構140結合為一體。同時，熱管10 中心由毛細結構140、160内表面圍成了一沿熱管10延伸方 ⑩向設置之蒸汽流道180，其内裝有適量工作液體。 所述複合式熱管10之製造過程如下：首先，如圖4a、 ’ 4b所示，在一圓柱狀中心棒110—邊緣處開一弧形凹槽 112 ;接著，如圖4c、4d所示，將一纖維式毛細結構160置 於該中心棒110之凹槽112中；然後，如圖4e所示，將含有 圖4d所示結構插入一中空圓柱形金屬殼體120内，並將金屬 粉體140a填充於中心棒110與殼體120間之間隙内；隨後， 高溫燒結該金屬殼體120，使得殼體120中之金屬粉體140a 8 •1289654 • * 形成燒結式毛細結構140，同時將一纖維式毛細結構160與 - 毛細結構140也燒結成一體；然後抽離中心棒110則形成了 如圖4f所示之複合式熱管10a ;再對熱管10a進行焊尾、縮 管、注液、抽真空 '封口等處理以形成一直管式熱管l〇b， 如圖5、圖6所示；最後經由折彎壓扁，可得到如圖2所示之 一包含燒結式第一毛細結構140及纖維式第二毛細結構160 .之複合式熱管10。 ， 該第一、第二毛細結構140、160在複合式熱管10中具 有固定之相對位置，不會影響蒸汽流道180内蒸汽之傳輸， 同時使得熱管10兼具複合式熱管之功能，尤其在熱管10經 過折彎打扁後其仍保有最佳之毛細結構組合，以有效輸送 冷凝後之工作液體。 值得注意之係，以上所述之燒結式毛細結構140可以用 溝槽式毛細結構所替代，以構成本發明之其他實施例，與 實施例一熱管10製造過程所不同之處在於： 春構成第一毛細結構之溝槽式毛細結構與空心殼體先為 -一體成形；然後再將容置有纖維式毛細結構之中心棒插入 空心殼體内，以使纖維式毛細結構與溝槽式毛細結構充分 接觸；隨後，高溫燒結該空心殼體，使得殼體中纖維式毛 細結構與溝槽式毛細結構燒結為一體；然後抽離中心棒形 成複合式熱管。 所述纖維式毛細結構160可以為編織網、中空微管組、 蜂巢狀金屬箔、金屬箔等其中任意一種。在以上所述之複 9 1289654 • » 合式熱管10之製造過程中，中心棒110上所開凹槽112除為 狐形外，還可為錐形、倒三角形、方形等其中任意一種， 〜如圖7a-7c所示。 - 請參閱圖8及圖9，為本發明之實施例二複合式熱管 20，該熱管20與實施例一之熱管1〇所不同之處在於，其纖 維式毛細結構260設置在熱管20内燒結式第一毛細結構24〇 •靠近管體内彎側之内表面上。 • 綜上所述，本發明之複合式熱管10、20藉由在製造過 程中之中心棒110上開設凹槽112 ,使得複合式熱管1〇、2〇 中之纖維式毛細結構260燒結後固立至管内壁，從而熱管變 形後不影響蒸汽在流道180、280内之傳輸，並可利用燒結 式毛細結構之抗重力特性及結合纖維狀毛細結構之最短平 均自由路徑更快速地傳輸工作液體。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上該者僅為本發明之較佳實施例，舉凡熟 •悉本案技藝之人士，在爰依本發明精神所作之等效修飾或 *變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係習知技術溝槽式與編織網毛細結構熱管之縱向 截面圖。 圖2係本發明實施例一複合式熱管之縱向截面圖。 圖3係沿圖2中線ΠΙ - HI之橫向截面圖。 圖4a-圖4f係本發明實施例一複合式熱管製造工藝圖。 1289654 圖5係本發明實施例一直管式複合式熱管縱向截面圖。 圖6係圖5沿Vi-VI之橫向截面圖。 圖7a-圖7c係圖4中心棒不同實施例之橫向截面圖。 圖8係本發明實施例二複合式熱管之縱向截面圖。 圖9係沿圖8中線K-IX之橫向截面圖。 【主要元件符號說明】1289654 t * thousand* Nine, invention description: [Technical field to which the invention pertains] The present invention relates to a type of heat transfer device, and in particular to a composite heat pipe. [Prior Art] The heat pipe is widely used because of its characteristics of ultra-quiet, high thermal conductivity, light weight, small size, no moving parts, simple structure and versatility. Its basic structure is to set the capillary of the fluid to be easily absorbed on the inner wall of the closed pipe. The structure|layer, while its central space is in an empty state, and an actuating fluid corresponding to the total volume of the pores of the capillary structure layer is injected into the vacuum-tight closed pipe. At present, the use of a fine structure such as a powder sintered type, a groove type, a fiber type or a woven circumference type single type 'but a single type _ type capillary structure heat pipe bending and flattening, the steam flow path will become unsmooth and its capillary The structure will also be destroyed, the grooved heat pipe is particularly serious, and its performance will be greatly reduced. In order to solve the above problem, the composite heat pipe is used in the heat, for example, the grooved wool structure is combined with the woven mesh capillary structure, as shown in Fig. i, which is added in the heat pipe of the groove type 2 fine structure-floating The woven mesh type capillary structure is used to change the shortcomings of the squeezing type of the hot squash in the squatting and squeezing, and the increase in the woven woven fabric, but it cannot be fixed due to the added woven capillary structure. The floating woven capillary structure causes the steam to be unsmooth, which in turn causes the heat to be effectively transmitted. From the experiment, 埶―* this; the pre-woven braided capillary structure is arbitrarily placed in the heat pipe &±the yield is low and the heat dissipation effect of the electronic components is not 6. 289,654, which in turn affects the service life of the electronic components, especially After the heat pipe is bent, its maximum heat transfer will be reduced by more than 50%. SUMMARY OF THE INVENTION It is necessary to provide a composite heat pipe and a method of manufacturing the same. The invention relates to a method for manufacturing a double-type heat pipe with stable and high-efficiency heat transfer performance, comprising the steps of: a) providing a central rod having a groove on the surface; b) (four)-capillary structure, placing it in the repairing ~ bar concave a tank; c) providing a metal pipe body, the center rod with the capillary structure is placed in the metal casing; d) I another - capillary structure material is filled between the center rod and the casing _; e) The shell is sintered at a high temperature until the two capillary structures are sintered into a body; f) the center rod is removed; g) (4) the shell is welded, shrunk, filled, vacuumed, and sealed. A composite heat pipe manufacturing method comprising the steps of: a) providing a surface having a groove and a rod; b) providing a capillary structure, placing it in the φ: a groove of the rod; c) providing an inner wall a metal body with a grooved capillary structure, the center rod of the V-capillary structure is placed in the metal shell; the shell is sintered at a high temperature until the two capillary structures are sintered into one body; e) Rod, f) welding, shrinking, injecting, vacuuming, and sealing the set. The composite heat pipe includes a sealed hollow casing, and a steam flow passage disposed along the extending direction of the heat pipe is formed in the casing, and an appropriate amount of working liquid is disposed therein, and a first capillary is attached to the inner wall of the casing The structure, a second capillary structure is sintered and bonded to the inner surface of the first capillary structure. The composite heat pipe has a concave 1289654 • * slot in the manufacturing process, so that the capillary structure in the heat pipe has a relatively fixed position so as not to affect the steam-transmission in the flow channel, and after being bent and flattened The steam flow path of the heat pipe can still maintain a smooth and capillary structure integrity, and it is advantageous to combine the two capillary structure characteristics to transfer the working liquid more quickly. The invention will now be further described with reference to the specific embodiments thereof with reference to the accompanying drawings. [Embodiment] φ Please refer to FIG. 2 and FIG. 3, which are longitudinal and transverse cross-sectional views of a composite heat pipe 10 according to an embodiment of the present invention. The heat pipe 10 is U-shaped and has a rectangular cross section. The heat pipe 10 includes a hollow casing 120. A sintered first capillary structure 140 is attached to the inner wall of the hollow casing 120, and the first capillary structure 140 in the heat pipe 10 is attached. A groove 142 disposed along the extending direction of the heat pipe 10 is disposed on the inner surface of the outer curved side of the tube. A fiber-shaped second capillary structure 160 is received in the groove 142 and integrated with the first capillary structure 140. At the same time, the center of the heat pipe 10 is surrounded by the inner surface of the capillary structure 140, 160 into a steam flow path 180 disposed along the extending direction of the heat pipe 10, and an appropriate amount of working liquid is contained therein. The manufacturing process of the composite heat pipe 10 is as follows: First, as shown in FIGS. 4a and 4b, an arcuate groove 112 is opened at the edge of a cylindrical center rod 110; then, as shown in Figs. 4c and 4d, A fibrous capillary structure 160 is placed in the recess 112 of the center rod 110; then, as shown in Fig. 4e, the structure shown in Fig. 4d is inserted into a hollow cylindrical metal casing 120, and the metal powder is 140a is filled in the gap between the center rod 110 and the casing 120; subsequently, the metal casing 120 is sintered at a high temperature, so that the metal powder 140a 8 • 1289654 in the casing 120 forms a sintered capillary structure 140, and at the same time The fibrous capillary structure 160 and the capillary structure 140 are also sintered into one body; then the center rod 110 is removed to form a composite heat pipe 10a as shown in Fig. 4f; and the heat pipe 10a is welded, shrunk, filled, and pumped. Vacuum 'sealing and the like to form a continuous tubular heat pipe 10b, as shown in FIG. 5 and FIG. 6; finally, by bending and flattening, one of the materials shown in FIG. 2 including the sintered first capillary structure 140 and the fiber can be obtained. A composite heat pipe 10 of the second capillary structure 160. The first and second capillary structures 140, 160 have a fixed relative position in the composite heat pipe 10, and do not affect the transmission of steam in the steam flow path 180, and at the same time, the heat pipe 10 has the function of a composite heat pipe, especially in After the heat pipe 10 is bent and flattened, it still retains the optimal combination of capillary structures to effectively deliver the condensed working liquid. It should be noted that the sintered capillary structure 140 described above may be replaced by a grooved capillary structure to constitute another embodiment of the present invention, which differs from the manufacturing process of the heat pipe 10 of the first embodiment in that: The grooved capillary structure of a capillary structure and the hollow shell are first-integrally formed; then the center rod accommodating the fiber capillary structure is inserted into the hollow shell to make the fiber capillary structure and the grooved capillary structure Full contact; subsequently, the hollow shell is sintered at a high temperature, so that the fibrous capillary structure in the shell is sintered integrally with the grooved capillary structure; then the center rod is drawn away to form a composite heat pipe. The fibrous capillary structure 160 may be any one of a woven mesh, a hollow microtube set, a honeycomb metal foil, a metal foil, and the like. In the manufacturing process of the above-mentioned composite 9 1289654 • » the heat pipe 10, the groove 112 formed on the center rod 110 may be a fox shape, and may be any one of a cone, an inverted triangle, a square, and the like. Figures 7a-7c are shown. Referring to FIG. 8 and FIG. 9, FIG. 8 is a composite heat pipe 20 according to the second embodiment of the present invention. The heat pipe 20 is different from the heat pipe 1 of the first embodiment in that the fiber capillary structure 260 is disposed in the heat pipe 20 for sintering. The first capillary structure 24〇 is close to the inner surface of the curved side of the tube body. In summary, the composite heat pipe 10, 20 of the present invention has a groove 112 formed in the center rod 110 during the manufacturing process, so that the fiber capillary structure 260 in the composite heat pipe 1〇, 2〇 is sintered and solidified. Standing to the inner wall of the pipe, the heat pipe does not affect the transmission of steam in the flow passages 180, 280, and can transmit the working fluid more quickly by utilizing the anti-gravity characteristics of the sintered capillary structure and the shortest mean free path combined with the fibrous capillary structure. . In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only a preferred embodiment of the present invention, and those skilled in the art will be able to cover the equivalent modifications or variations of the present invention within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal cross-sectional view showing a conventional heat pipe of a grooved and woven mesh structure. 2 is a longitudinal cross-sectional view of a composite heat pipe according to an embodiment of the present invention. Figure 3 is a transverse cross-sectional view taken along line ΠΙ - HI of Figure 2; 4a-4f are diagrams showing a manufacturing process of a composite heat pipe according to an embodiment of the present invention. 1289654 FIG. 5 is a longitudinal cross-sectional view of a tubular composite heat pipe according to an embodiment of the present invention. Figure 6 is a transverse cross-sectional view along line Vi-VI of Figure 5. Figures 7a-7c are transverse cross-sectional views of different embodiments of the center rod of Figure 4. Figure 8 is a longitudinal cross-sectional view of a composite heat pipe according to a second embodiment of the present invention. Figure 9 is a transverse cross-sectional view taken along line K-IX of Figure 8. [Main component symbol description]
Ho 12〇 l4〇a 熱管 10，10a，10b，20 中心棒Ho 12〇 l4〇a heat pipe 10,10a,10b,20 center bar
凹槽 112,142 殼體 毛細結構140，160,240,260金屬粉體 流道 180,280Groove 112, 142 housing capillary structure 140, 160, 240, 260 metal powder flow path 180, 280
1111