201219735 六、發明說明： 【發明所屬之技術領域】 [⑽1] 本發明涉及一種傳熱裝置，特別涉及一種平板式熱管。 【先前技秣ί】 [0002] 電子元件在運行過程中通常產生大量的熱量，為確保電 子元件正常運行，該等熱量需要及時散發出去，該電子 元件上通常加裝一散熱器為其散熱。該散熱器通常包括 一吸熱板及設置於該吸熱板上的散熱鰭片。該吸熱板由 銅、鋁等熱傳導性良好的金屬材料製成，但金屬板受制 〇 於材料本身有限的熱傳導性，若對高發熱量的電子元件 ，會產生明顯的熱阻而無法達到良好散熱，影響電子元 件的運行穩定性。 [0003] 為提升散熱器的效率，業界亦採用在吸熱板内設置一腔 體，該腔體内密封有水、乙醇等工作流體，利用工作流 體的相變化來提高傳熱速度。工作時，工作流體在吸熱 板的吸熱區吸熱氣化到達吸熱板的放熱區，而後冷卻液 Q 化。為使液化後的工作流體能更快回流至吸熱板的吸熱 區，該吸熱板於腔體周邊設置一種毛細結構。液化後的 工作流體在毛細結構中回流至吸熱區參與相變化循環。 然而，在使用的過程中，該散熱器的吸熱板在受到來自 外部和内部的壓力作用容易出現產品變形，甚至導致吸 熱板内的毛細結構脫落，嚴重影響了散熱器的散熱效率 和穩定性。 【發明内容】 [0004] 有鑒於此，實有必要提供一種結構穩固的平板式熱管。 099139255 表單編號Α0101 第3頁/共19頁 0992068446-0 201219735 [0005] 一種平板式熱管，其包括一密封的殼體，該殼體内填充 有一定量的工作流體，複數縱長的毛細結構並行、相間 隔地排列在殼體内，所述平板式熱管沿縱向具有一蒸發 端及一冷凝端，每一毛細結構的兩端分別位於平板式熱 管的蒸發端及冷凝端，每一毛細結構的上、下表面分別 對應支撐於殼體的上、下内表面，各毛細結構之間形成 複數沿殼體縱向延伸的蒸汽流動通道。 [0006] 與習知技術相比*本發明的平板式熱管内設置的毛細結 構既可為平板式熱管内工作流體提供毛細力，保證相變 化循環的正常進行，又可對其上下兩側的殼體提供有力 的支撐，防止平板式熱管在内、外力的作用下發生變形 ，以保證平板式熱管的平面度。 【實施方式】 [0007] 圖1示出了本發明第一實施例的平板式熱管20應用的示意 圖，該平板式熱管20具有與熱源30導熱接觸的一蒸發端 21及與鰭片組10導熱接觸的一冷凝端23。 [0008] 請同時參照圖2及圖3，該平板式熱管20包括一密封的殼 體2 5及貼附在殼體2 5内表面的複數縱長的毛細結構2 6。 殼體25呈縱長形且為扁平狀，包括一水平的底板24及一 罩設該底板24的盖板22。該盖板22的周緣密封貼置在該 底板24的周緣上，從而在底板24與蓋板22之間形成一密 閉的腔體28。該腔體28内填充有一定量的工作流體（未 標號），液態的工作流體可以經毛細結構26從冷凝端23 回流至蒸發端21。如圖2所示，上述複數毛細結構26並行 、相間隔地排列在腔體28内，每一毛細結構26從該平板 099139255 表單編號A0101 第4頁/共19頁 0992068446-0 201219735 式熱管20的冷凝端23延伸至蒸發端21，每__毛細結鄉 的上、下表面分別抵靠於蓋板22和底板24的内側表面， 從而將該腔體28分隔成複數沿殼體託縱向延伸的蒸汽流 動通道280。該複數毛細結構26由金屬或陶究粉末燒結而 成，其具有一疋強度，以對其兩侧的底板24和蓋板22提 供有力的支撐，防止平板式熱管2〇在内、外力的作用下 變形，以保證平板式熱管2〇的平面度。 國使料’該平板式熱管20的蒸發端21緊貼熱源30吸熱， 殼體25内的工作流體從其蒸發端21吸熱氣化為蒸汽沿各 毛細結構26間的蒸汽流動通道28〇流動到冷凝端23，氣態 的工作流體在冷凝端23遇冷放出熱量而冷卻為液態，該 熱量進而傳遞至鰭片組1〇，藉由鰭片14散發出去。液態 的工作流體藉由毛細結構26的毛細力由冷凝端23流回至 蒸發端21進行相變化循環。 [0010] 〇 圖4示出了本發明的毛細結構的另___種形態，與圖3中的 毛細結構26區別在於：各毛細結構26a位於平板式熱管20 的冷凝端的部分彼關錢結的金屬制究連接，使液 態的工作流體可以沿燒結的金屬或陶t從其中__個毛細 結構26a流到另一個毛細結構2ga。 [0011]圖5示出了本發明的毛細結構的另一種形態，與圖4中的 毛細結構26a區別在於：各毛細結構2此兩端彼此均藉由 燒結的金屬或陶瓷連接。 剛圖6示出了本發明的毛細結構的另一種形態，與圖4中的 毛細結構26a區別在於：各毛細結構心位於平板式熱管 099139255 表單編號A0101 第5頁/共19頁 0992068446-0 201219735 20的冷凝端的部分除了彼此藉由燒結的金屬或陶瓷連接 外，另外還沿與蒸汽流動通道2 8 0垂直的方向開設了兩蒸 汽流道282，從而不僅使液態的工作流體可以沿燒結的金 屬或陶瓷從其中一個毛細結構26c流到另一個毛細結構 26c，還使氣態的工作流體可以沿蒸汽流道282從其中一 個蒸汽流動通道280流到另一個蒸汽流動通道280，使熱 量分佈更加均勻。 [0013] 圖7示出了本發明的毛細結構的另一種形態，與圖5中的 毛細結構26b區別在於：各毛細結構26d兩端除了彼此均 藉由燒結的金屬或陶瓷連接外，另外其兩端還沿與蒸汽 流動通道280垂直的方向分別開設了兩蒸汽流道282a。 [0014] 圖8示出了對應本發明第二實施例的一平板式熱管20a， 與第一實施例中的平板式熱管20區別在於：該平板式熱 管2 0a中間經過彎折，使蒸發端2la和冷凝端23a分別位 於不同平面。 [0015] 圖9示出了對應本發明第三實施例的一平板式熱管20b， 與第一實施例中的平板式熱管20區別在於：該平板式熱 管20b中間經過彎折，使蒸發端21b和冷凝端23b在同一 平面内相垂直。 [0016] 與習知技術相比，本發明的平板式熱管20、20a、20b内 設置的毛細結構既可為平板式熱管20、20a、20b内工作 流體提供毛細力，保證相變化循環的正常進行，又可對 其上下兩側的殼體25提供有力的支撐，防止平板式熱管 20、20a、20b在内、外力的作用下發生變形，以保證平 099139255 表單編號A0101 第6頁/共19頁 0992068446-0 201219735 板式熱管20、20a、20b的平面度。 [0017] 综上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述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】 [0018] 圖1係本發明第一實施例的一平板式熱管應用的示意圖。 [0019] 圖2係圖1中的平板式熱管沿II-II線的剖視圖。201219735 VI. Description of the Invention: [Technical Field of the Invention] [(10) 1] The present invention relates to a heat transfer device, and more particularly to a flat plate heat pipe. [Previous Technology] [0002] Electronic components usually generate a large amount of heat during operation. To ensure proper operation of the electronic components, the heat needs to be dissipated in time. A heat sink is usually added to the electronic components for heat dissipation. The heat sink generally includes a heat absorbing plate and heat dissipating fins disposed on the heat absorbing plate. The heat absorbing plate is made of a metal material having good thermal conductivity such as copper or aluminum, but the metal plate is subject to the limited thermal conductivity of the material itself, and if the electronic component with high heat generation has a significant thermal resistance, it cannot achieve good heat dissipation. Affect the operational stability of electronic components. [0003] In order to improve the efficiency of the heat sink, the industry also adopts a cavity in the heat absorbing plate. The cavity is sealed with working fluids such as water and ethanol, and the phase change of the working fluid is used to increase the heat transfer speed. During operation, the working fluid absorbs heat in the heat absorption zone of the heat absorbing plate to reach the heat release zone of the heat absorbing plate, and then the coolant is Q. In order to allow the liquefied working fluid to flow back to the heat absorbing zone of the heat absorbing plate more quickly, the heat absorbing plate is provided with a capillary structure around the cavity. The liquefied working fluid is returned to the endothermic zone in the capillary structure to participate in the phase change cycle. However, in the process of use, the heat absorbing plate of the heat sink is prone to deformation of the product due to pressure from the outside and the inside, and even causes the capillary structure in the heat absorbing plate to fall off, which seriously affects the heat dissipation efficiency and stability of the heat sink. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide a structurally stable flat plate heat pipe. 099139255 Form No. 1010101 Page 3 of 19 0992068446-0 201219735 [0005] A flat heat pipe comprising a sealed casing filled with a quantity of working fluid, a plurality of longitudinal capillary structures in parallel, Arranged in the housing at intervals, the flat heat pipe has an evaporation end and a condensation end in the longitudinal direction, and the two ends of each capillary structure are respectively located at the evaporation end and the condensation end of the flat heat pipe, on each capillary structure The lower surface is respectively supported on the upper and lower inner surfaces of the casing, and a plurality of steam flow passages extending longitudinally along the casing are formed between the capillary structures. Compared with the prior art, the capillary structure provided in the flat heat pipe of the present invention can provide capillary force for the working fluid in the flat heat pipe, ensure the normal progress of the phase change cycle, and can be used for the upper and lower sides of the phase change cycle. The shell provides strong support to prevent deformation of the flat heat pipe under the action of internal and external forces to ensure the flatness of the flat heat pipe. [Embodiment] FIG. 1 is a schematic view showing the application of a flat type heat pipe 20 according to a first embodiment of the present invention. The flat type heat pipe 20 has an evaporation end 21 in thermal contact with the heat source 30 and is thermally conductive with the fin group 10. A condensation end 23 of the contact. 2 and FIG. 3, the flat heat pipe 20 includes a sealed casing 25 and a plurality of longitudinally elongated capillary structures 26 attached to the inner surface of the casing 25. The housing 25 is elongated and flat and includes a horizontal bottom plate 24 and a cover plate 22 that covers the bottom plate 24. The peripheral edge of the cover plate 22 is sealingly attached to the periphery of the bottom plate 24 such that a closed cavity 28 is formed between the bottom plate 24 and the cover plate 22. The chamber 28 is filled with a quantity of working fluid (not labeled) through which the liquid working fluid can be returned from the condensing end 23 to the evaporation end 21 via the capillary structure 26. As shown in FIG. 2, the plurality of capillary structures 26 are arranged in parallel and spaced apart in the cavity 28, and each capillary structure 26 is from the flat plate 099139255. Form No. A0101 Page 4 / 19 pages 0992068446-0 201219735 type heat pipe 20 The condensing end 23 extends to the evaporation end 21, and the upper and lower surfaces of each __ capillary joint abut against the inner side surfaces of the cover plate 22 and the bottom plate 24, respectively, thereby separating the cavity 28 into a plurality of longitudinal extensions along the housing support. Steam flow channel 280. The plurality of capillary structures 26 are sintered from metal or ceramic powder, and have a strength to provide strong support for the bottom plate 24 and the cover plate 22 on both sides thereof, thereby preventing the flat heat pipe 2 from being subjected to internal and external forces. Deformation to ensure the flatness of the flat heat pipe 2〇. The evaporation material 21 of the flat heat pipe 20 abuts against the heat source 30, and the working fluid in the casing 25 absorbs heat from its evaporation end 21 to vaporize and flows along the steam flow passage 28 between the capillary structures 26 to At the condensing end 23, the gaseous working fluid is cooled by the cold at the condensing end 23 to be cooled, and the heat is transferred to the fin group 1 〇, which is emitted by the fins 14. The liquid working fluid flows back from the condensation end 23 to the evaporation end 21 by the capillary force of the capillary structure 26 to undergo a phase change cycle. [0010] FIG. 4 shows another embodiment of the capillary structure of the present invention, which differs from the capillary structure 26 of FIG. 3 in that each capillary structure 26a is located at the condensation end of the flat heat pipe 20. The metal is connected so that the liquid working fluid can flow from the sintered metal or ceramic t to the other capillary structure 2a. Fig. 5 shows another embodiment of the capillary structure of the present invention, which differs from the capillary structure 26a of Fig. 4 in that the respective capillary structures 2 are joined to each other by a sintered metal or ceramic. Figure 6 shows another embodiment of the capillary structure of the present invention, which differs from the capillary structure 26a of Figure 4 in that each capillary structure is located in a flat heat pipe 099139255. Form No. A0101 Page 5 / 19 pages 0992068446-0 201219735 The portions of the condensing ends of 20 are connected to each other by sintered metal or ceramic, and further open two steam channels 282 in a direction perpendicular to the steam flow passages 280, so that not only the liquid working fluid can be along the sintered metal. Or the flow of ceramic from one of the capillary structures 26c to the other capillary structure 26c also allows gaseous working fluid to flow from one of the vapor flow channels 280 to the other vapor flow channel 280 along the vapor flow path 282 to provide a more even heat distribution. [0013] FIG. 7 illustrates another embodiment of the capillary structure of the present invention, which differs from the capillary structure 26b of FIG. 5 in that both ends of each capillary structure 26d are connected to each other by sintered metal or ceramic, and The two ends also open two steam flow passages 282a in a direction perpendicular to the steam flow passage 280. 8 shows a flat heat pipe 20a corresponding to the second embodiment of the present invention, which is different from the flat heat pipe 20 of the first embodiment in that the flat heat pipe 20a is bent in the middle to make the evaporation end 2la and the condensation end 23a are located on different planes, respectively. 9 shows a flat heat pipe 20b corresponding to the third embodiment of the present invention, which is different from the flat heat pipe 20 of the first embodiment in that the flat heat pipe 20b is bent in the middle to make the evaporation end 21b. It is perpendicular to the condensation end 23b in the same plane. [0016] Compared with the prior art, the capillary structure provided in the flat heat pipes 20, 20a, 20b of the present invention can provide capillary force to the working fluid in the flat heat pipes 20, 20a, 20b, and ensure the normal phase change cycle. In addition, the upper and lower sides of the casing 25 can be strongly supported to prevent deformation of the flat heat pipes 20, 20a, 20b under the action of internal and external forces to ensure flat 099139255 Form No. A0101 Page 6 of 19 Page 0992068446-0 201219735 Flatness of the plate heat pipes 20, 20a, 20b. [0017] In summary, the present invention complies with the requirements of the invention patent, and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0018] FIG. 1 is a schematic view showing a flat type heat pipe application according to a first embodiment of the present invention. 2 is a cross-sectional view of the flat heat pipe of FIG. 1 taken along line II-II.
[0020] 圖3至圖7係圖2中平板式熱管内的毛細結構的多個不同形 態的示意圖。 [0021] 圖8為本發明第二實施例的一平板式熱管的示意圖。 [0022] 圖9為本發明第三實施例的一平板式熱管的示意圖。 【主要元件符號說明】3 to 7 are schematic views of a plurality of different configurations of the capillary structure in the flat heat pipe of FIG. 2. 8 is a schematic view of a flat heat pipe according to a second embodiment of the present invention. 9 is a schematic view of a flat heat pipe according to a third embodiment of the present invention. [Main component symbol description]
[0023] 鰭片組：10 : it : 」Λ V[0023] Fin set: 10 : it : "Λ V
[0024] 平板式熱管：20、20a、20 b:: [0025] 蒸發端：21、21a、21b [0026] 冷凝端：23、23a、23b [0027] 殼體：25 [0028] 熱源：30 [0029] 蓋板：22 [0030] 底板：24 099139255 表單編號A0101 第7頁/共19頁 0992068446-0 201219735 [0031] 毛細結構：26、26a、26b、26c、26d [0032] 腔體：28 [0033] 蒸汽流動通道：280 [0034] 蒸汽流道：282、282a 099139255 表單編號A0101 第8頁/共19頁 0992068446-0[0024] Flat heat pipe: 20, 20a, 20 b:: [0025] Evaporation end: 21, 21a, 21b [0026] Condensing end: 23, 23a, 23b [0027] Housing: 25 [0028] Heat source: 30 [0029] Cover: 22 [0030] Base plate: 24 099139255 Form number A0101 Page 7 / Total 19 pages 0992068446-0 201219735 [0031] Capillary structure: 26, 26a, 26b, 26c, 26d [0032] Cavity: 28 [0033] Steam Flow Channel: 280 [0034] Steam Flow Path: 282, 282a 099139255 Form No. A0101 Page 8 / Total 19 Page 0992068446-0