M418980 五、新型說明： 【新型所屬之技術領域】 本創作係提供一種翼型葉片及風扇裝置，尤指一種可降 低風阻且提高散熱效率的翼型葉片及風扇裝置。 【先前技術】 請參閱第1圖，第1圖為先前技術之一防回流機構50 之示意圖。防回流機構50包含有一外框52及複數個葉片 φ 54。複數個葉片54係樞接於外框52内部，並依據施加風力 之強度大小而相對外框52轉動。如第1圖所示，葉片54係 為一平板型結構，且其樞接軸係設置於該平板型結構之端 邊。當設置於防回流機構50之旁側的風扇啟動時，風扇所 產生之風力可用來推動葉片54相對外框52轉動，以打開防 回流機構50之流道。然而受到葉片54本身重力的影響，葉 片54的重量會抵消風扇所提供之推力，故而提高風扇的風 I 阻，並降低其散熱效率。因此如何設計出一種可降低風阻且 提高風扇散熱效率的防回流機構，即為現今機械產業亟需努 力發展的重點目標。 【新型内容】 本創作係提供一種可降低風阻且提高散熱效率的翼型 葉片及風扇裝置，以解決上述之問題。 本創作之申請專利範圍係揭露一種翼型葉片，其包含有 一旋轉軸，以及一主體，該旋轉軸係穿設該主體。該主體之 3 M418980 -上端面之曲度實質上大於該主體之一下端面之曲度。 。本創作之申凊專利範圍另揭露該主體係藉由該旋轉軸 區为為一第一區塊與一第二區塊，且該第一區塊之一長度 質上小於該第二區塊之一長度。 、 本創作之申5月專利範圍另揭露該第一區塊之一上端面 之曲度實質上大於該第—區塊之—下端面之曲度。 本創作之申請專利範圍另揭露該第二區塊之一上端面 之曲度實質上大於該第二區塊之—下端面之曲度。 本創作之申請專利範圍另揭露該第一區塊之一上端面 之曲度實質上大於該第二區塊之—上端面之曲度。 本創作之申請專利範圍另揭露該主體之一側表面係設 置有一凸塊。 …本創作之中請專利範圍另揭露該翼型葉片另包含有一 補強肋’其係設置於該主體上相對應該旋轉轴之位置。 本創作之申請專·圍另揭露—種風扇裝置，其包含有 一載架風扇，其係設置於該載架内，—框架，其係連接 該載架且位於該風扇之出風口端，以及—翼型葉片，其係以 可樞轉方式安裝於該框架内，該風扇係用來輸出風力以驅動 該翼型葉片相對該框架轉動。該翼型葉片包含有一 以及一主體，該旋轉軸係穿設該主體。該主體之一上端面之 曲度實質上大於該主體之一下端面之曲度。 本創作之翼型葉片及風扇裝置係採用上端面之曲度大 於下端面之曲度的設計，以使氣流通過翼型葉片時，；藉由 M418980 兩端面之靜壓差而產生上升推力；此外，翼型葉片之旋轉軸 係設置於主體的中段，因此風扇藉由提供少量的風力即可克 服翼型葉片本身之重力，且風扇所提供之風力可同時產生強 大的上升推力，更有助於推動翼型葉片相對框架翻轉，以提 高風扇裝置的散熱效率。因此本創作之翼型葉片及風扇裝置 不需提高風扇之轉速即可有效地開啟防回流機構之翼型葉 片，故具有降低噪音及減少能量消耗之優點。 φ 【實施方式】 請參閱第2圖至第4圖，第2圖與第3圖分別為本創作 實施例之一風扇裝置10於不同操作模式之示意圖，第4圖 為本創作實施例之風扇裝置10之剖視圖。風扇裝置10包含 有一載架12，一風扇14，其係設置於載架12内，以及一防 回流機構16，其係設置於載架12上。本創作之風扇裝置10 可應用於運轉功率較高之電子裝置，例如一主機伺服器，由 於該主機伺服器所產生之熱量較大，故一般係搭配使用防回 * 流機構16，用來防止帶有熱量之氣流於風扇14停止運作 時，沿著相反於風扇14所產生之氣流流向之一方向流動， 以提高風扇裝置10的散熱效率。 防回流機構16係由一框架18與複數個翼型葉片20所 組成。框架18連接載架12且位於風扇14之出風口端。複 數個翼型葉片20係以可柩轉方式安裝於框架18内。如第2 圖所示，當風扇14啟動時，複數個翼型葉片20受到風力推 動而相對框架18掀起，因此風扇14所引發的氣體流動可穿 5 M418980 越框架18流出以帶走熱量，以使風扇裝置10具有較佳的散 熱效率。另一方面，如第3圖所示，當風扇14停止運轉後， 複數個翼型葉片20失去氣流推力支撐，故會受到其自身重 力帶動而相對框架18樞轉回一初始位置，意即各翼型葉片 20會遮蔽框架18之開口，以防止帶有熱量之氣體反向回流 至載架12内部而降低風扇裝置10的散熱效率。 請參閱第5圖與第6圖，第5圖為本創作實施例之翼型 葉片20之外觀示意圖，第6圖為本創作實施例之翼型葉片 20之剖視圖。翼型葉片20包含有一旋轉軸22與一主體24。 旋轉軸22係穿設主體24,且於兩端分別突出兩樞接端22卜 兩樞接端221可分別設計為具有不同孔徑之凸點，且框架18 上可形成具有相對應尺寸之樞接孔，由於各框接端221需搭 配相對應尺寸的樞接孔才可與之密合，故可作為避免翼型葉 片20錯置於框架18内部之防呆設計。 如第5圖與第6圖所示，主體24可藉由旋轉軸22區分 為一第一區塊26及一第二區塊28,且第一區塊26之一長度 L1係可實質上小於第二區塊28之一長度L2。為了使本創作 之翼型葉片20可利用風扇14所產生之風力提供一上升推 力，主體24之一上端面241之曲度係可實質上大於主體24 之一下端面242之曲度，換句話說，氣體流經主體24之上 端面241的距離實質上大於流經下端面242的距離，因此上 端面241之流速整體上高於下端面242之流速，意即氣流作 用在上端面241的靜壓會小於作用在下端面242的靜壓。由 M418980 =:端面之靜壓差異，使得翼型葉片2G於受到風力吹 %可，到一向上的合力，該合力即為前述之上升推力。 如第6圖所示，由於翼型葉片2()之底部係可為一不且 f曲度、接近平面的結構，故長可為第—區塊％之下 端面262的表面長度，且長度^可為第二區塊以之下端面 的表面長度。另一方面’第一區塊26之上端面26ι的表 面長度可為L3,且第二區塊28之上端面281的表面長度可 為4本創作實施例之翼型葉片2〇的結構特徵可更詳細說 2 ’翼型葉片2G之第-區塊26之-上端面261的曲度可 貫質上大於下端面262的曲度（意即長度u可實質上大於長 度L1)，翼型葉片2〇之第二區塊28之一上端面281的曲度 可貫質上大於一下端面282的曲度（意即長度L4可實質上大 於長度L2),翼型葉片20之第一區塊％之上端面261的曲 度可實質上大於第二區塊28之上端面281的曲度。綜合來 說，第一區塊26及第二區塊.28的上端面長度總合(L3及l4) 係實質上大於第一區塊26及第二區塊28的下端面長度總合 (L1及L2)，因此風扇14所產生之風力才可於流經主體24 提供該上升推力。另一方面，為了使風扇14所產生之風力 可快速於主體24之表面形成可提供上升推力的流場，第一 區塊26之上端面261的曲度係實質上大於第二區塊28之上 端面281的曲度，因此翼型葉片20可於受到風扇14之風力 推動時，快速地相對框架18樞轉並同時產生足夠的上升推 力，以使防回流機構16可迅速開啟以提高風扇裝置1〇的散 7 M418980 熱效率。 除此之外’翼型葉片20之主體24的兩旁側表面可分別 設置有-凸塊243。當翼型葉片2〇相對框架18轉動時，凸 塊243係可用來接觸框架18且相對其滑移。凸塊如的功 能係用來防止翼型葉片2G與框架18間產生大面積的面接觸 或線接觸，意即凸塊243可於翼型葉片2〇及框架18間提供 -點接觸，故可降低翼型葉片2G與框架18之間的磨擦力以 提尚樞轉效能。如第4圖所示，框架18上另可設置有兩止 擋塊181。兩止擋塊181係可用來於翼型葉片加相對框架 18樞轉至-預設範圍時’止播翼型葉片2〇之凸塊243以限 制其旋轉，用來防止翼型葉片2〇相對框架18之轉動超過預 設角度範圍。舉例來說，翼型葉片2()相對框架18之轉動範 圍係介於零度至九十度之間。當翼型葉片2〇相對框架以之 夾角為九十度時，如第2圖所示，防回流機構16係完全開 啟，以使風扇14所產生之風力可快速帶走熱量；當 片20相對框架18之央角為零度時，如第3圖所示，防回流 機構16係完全閉合，用以防止帶有熱量之外部氣體經由框 木18逆流至載架12内部。再者，翼型葉片2〇另可選擇性 地包含有-補強肋3G，其可設置於主體24上相對應旋轉軸 22之位置。補強肋3〇係用來提高主體與旋轉軸κ的結 構強度，以避免其因長久使用或風力吹擊而損毀。 山相較於先前技術’本創作之翼型葉片及風扇裝置係採用 上端面之曲度大於下端面之曲度的設計，以使氣流通過翼型 葉f時’可藉由兩端面之靜壓差而產生上升推力 ;此外，翼 ^葉片之旋轉軸係設置於主體的中段，因此風扇藉由提供少 的八力即可克服翼型葉片本身之重力，且風扇所提供之風 ^可同時產生強大的上升推力，更有助於推動翼型葉片相對 框架翻轉’以提高風扇裝置的散熱效率。因此本創作之翼型 :片及風扇裝置不需提高風扇之轉速即可有效地開啟防回 機構之翼型葉片’故具有降低噪音及減少能量消耗之優 實施例，凡依本創作申請專 皆應屬本創作之涵蓋範圍。 以上所述僅為本創作之較佳 利範圍所做之均等變化與修飾， 【圖式簡單說明】 第1圖為先前技術之防回流機構之示意圖。 第2圖與第3圖分別為本創作實 _ 例之風扇裝置於不同操作 模式之示意圖。 =4圖為本創作實_之風輕置之剖視圖。 =為本創作實施例之翼型葉片之外觀示意圖 弟圖為本創作實關之翼型^之剖視圖。 【主要凡件符號說明】 10 風扇裝置 12 14 風扇 16 18 框架 181 20 翼型葉片 22 載架 防回流機構 止擒塊 旋轉軸 M418980 221 框接端 24 主體 241 上端面 242 下端面 243 凸塊 26 第一區塊 261 上端面 262 下端面 28 第二區塊 281 上端面 282 下端面 30 補強肋 50 防回流機構 52 外框 54 葉片 L1 第一區塊之下端 面長度 L2 第二區塊之下端 L3 第一區塊之上端 面長度 面長度 L4 第二區塊之上端 面長度M418980 V. New Description: [New Technology Field] This creation provides an airfoil blade and fan unit, especially an airfoil blade and fan unit that can reduce wind resistance and improve heat dissipation efficiency. [Prior Art] Referring to Fig. 1, a first schematic view of a backflow prevention mechanism 50 of the prior art is shown. The backflow prevention mechanism 50 includes an outer frame 52 and a plurality of blades φ 54. A plurality of blades 54 are pivotally connected to the inside of the outer frame 52 and are rotated relative to the outer frame 52 depending on the strength of the applied wind force. As shown in Fig. 1, the blade 54 is of a flat type structure, and its pivotal shaft is disposed at the end of the flat type structure. When the fan disposed beside the backflow prevention mechanism 50 is activated, the wind generated by the fan can be used to push the blade 54 to rotate relative to the outer frame 52 to open the flow path of the backflow prevention mechanism 50. However, due to the gravity of the blade 54 itself, the weight of the blade 54 counteracts the thrust provided by the fan, thereby increasing the wind resistance of the fan and reducing its heat dissipation efficiency. Therefore, how to design a backflow prevention mechanism that can reduce the wind resistance and improve the heat dissipation efficiency of the fan is a key goal that the mechanical industry needs to strive for development. [New content] This creation provides an airfoil blade and fan unit that reduces wind resistance and improves heat dissipation efficiency to solve the above problems. The patent application scope of the present invention discloses an airfoil blade including a rotating shaft and a main body through which the rotating shaft passes. The curvature of the upper end face of the main body 3 M418980 is substantially greater than the curvature of the lower end face of one of the main bodies. . The scope of the patent application of the present invention further discloses that the main system is a first block and a second block by the rotating axis area, and one of the first blocks is substantially smaller in length than the second block. One length. The scope of the patent application of the present invention further discloses that the curvature of the upper end surface of one of the first blocks is substantially larger than the curvature of the lower end surface of the first block. The scope of the patent application of the present invention further discloses that the curvature of the upper end surface of one of the second blocks is substantially greater than the curvature of the lower end surface of the second block. The scope of the patent application of the present invention further discloses that the curvature of the upper end surface of one of the first blocks is substantially larger than the curvature of the upper end surface of the second block. The scope of the patent application of the present invention further discloses that a side surface of the main body is provided with a bump. The scope of the patent application also discloses that the airfoil blade further includes a reinforcing rib 'which is disposed on the body at a position corresponding to the axis of rotation. The application of the present invention is directed to a fan device comprising a carrier fan disposed in the carrier, a frame connected to the carrier and located at an air outlet end of the fan, and An airfoil blade is pivotally mounted within the frame for outputting wind power to drive the airfoil blade to rotate relative to the frame. The airfoil blade includes a body and a rotating shaft that passes through the body. The curvature of the upper end surface of one of the bodies is substantially greater than the curvature of the lower end surface of one of the bodies. The airfoil blade and the fan device of the present invention adopt a design in which the curvature of the upper end surface is larger than the curvature of the lower end surface, so that when the airflow passes through the airfoil blade, the rising thrust is generated by the static pressure difference between the two end faces of the M418980; The rotating shaft of the airfoil blade is disposed in the middle of the main body, so the fan can overcome the gravity of the airfoil blade itself by providing a small amount of wind, and the wind provided by the fan can simultaneously generate a strong rising thrust, which is more helpful. The airfoil blade is pushed against the frame to improve the heat dissipation efficiency of the fan device. Therefore, the airfoil blade and the fan device of the present invention can effectively open the airfoil blade of the anti-backflow mechanism without increasing the rotation speed of the fan, thereby having the advantages of reducing noise and reducing energy consumption. φ [Embodiment] Please refer to FIG. 2 to FIG. 4 , and FIG. 2 and FIG. 3 are respectively schematic diagrams of the fan device 10 in different operation modes according to an embodiment of the present invention, and FIG. 4 is a fan of the creation embodiment. A cross-sectional view of device 10. The fan assembly 10 includes a carrier 12, a fan 14 disposed within the carrier 12, and a backflow prevention mechanism 16 disposed on the carrier 12. The fan device 10 of the present invention can be applied to an electronic device with a high operating power, such as a host server. Since the heat generated by the host server is large, the anti-return mechanism 16 is generally used together to prevent When the fan 14 stops operating, the flow of heat flows in a direction opposite to the flow of the airflow generated by the fan 14 to improve the heat dissipation efficiency of the fan unit 10. The backflow prevention mechanism 16 is comprised of a frame 18 and a plurality of airfoil blades 20. The frame 18 is coupled to the carrier 12 and is located at the air outlet end of the fan 14. A plurality of airfoil blades 20 are rotatably mounted within the frame 18. As shown in Fig. 2, when the fan 14 is activated, a plurality of airfoil blades 20 are pushed by the wind to be lifted relative to the frame 18, so that the gas flow induced by the fan 14 can pass through the frame M18980 and the frame 18 flows out to remove heat. The fan unit 10 is provided with better heat dissipation efficiency. On the other hand, as shown in Fig. 3, after the fan 14 is stopped, the plurality of airfoil blades 20 lose the airflow thrust support, so they are driven by their own gravity and pivoted back to the initial position relative to the frame 18, meaning The airfoil blade 20 shields the opening of the frame 18 to prevent backflow of heat-laden gas into the interior of the carrier 12 to reduce the heat dissipation efficiency of the fan assembly 10. Referring to Figures 5 and 6, FIG. 5 is a schematic view showing the appearance of the airfoil blade 20 of the present embodiment, and FIG. 6 is a cross-sectional view of the airfoil blade 20 of the present embodiment. The airfoil blade 20 includes a rotating shaft 22 and a body 24. The rotating shaft 22 is disposed through the main body 24, and protrudes from the two pivoting ends 22 at two ends. The two pivoting ends 221 can be respectively designed as bumps having different apertures, and the frame 18 can be formed with a corresponding size. The holes can be used as a foolproof design to prevent the airfoil blades 20 from being misplaced inside the frame 18 because the frame ends 221 need to be matched with the correspondingly sized pivot holes. As shown in FIG. 5 and FIG. 6, the main body 24 can be divided into a first block 26 and a second block 28 by the rotating shaft 22, and the length L1 of one of the first blocks 26 can be substantially smaller than One of the second blocks 28 has a length L2. In order for the inventive airfoil blade 20 to provide a rising thrust using the wind generated by the fan 14, the curvature of the upper end surface 241 of the body 24 can be substantially greater than the curvature of the lower end surface 242 of the body 24, in other words, in other words The distance that the gas flows through the upper end surface 241 of the main body 24 is substantially greater than the distance flowing through the lower end surface 242. Therefore, the flow velocity of the upper end surface 241 is higher than the flow velocity of the lower end surface 242 as a whole, that is, the static pressure of the air flow on the upper end surface 241. It will be smaller than the static pressure acting on the lower end surface 242. From M418980 =: the static pressure difference of the end face, so that the airfoil blade 2G is subjected to the wind blowing, and the resultant force is the aforementioned rising thrust. As shown in FIG. 6, since the bottom portion of the airfoil blade 2() can be a structure that is not f-curved and close to a plane, the length can be the surface length of the end face 262 below the first block, and the length. ^ may be the surface length of the lower end face of the second block. On the other hand, the surface length of the upper end surface 261 of the first block 26 may be L3, and the surface length of the upper end surface 281 of the second block 28 may be 4 structural features of the airfoil blade 2 of the present embodiment. 2 in more detail, the curvature of the upper end surface 261 of the second section of the airfoil blade 2G can be substantially greater than the curvature of the lower end surface 262 (that is, the length u can be substantially greater than the length L1), the airfoil blade The curvature of the upper end surface 281 of one of the second blocks 28 may be substantially greater than the curvature of the lower end surface 282 (ie, the length L4 may be substantially greater than the length L2), and the first block % of the airfoil blade 20 The curvature of the upper end surface 261 may be substantially greater than the curvature of the end surface 281 of the second block 28. In summary, the total length of the upper end faces (L3 and 14) of the first block 26 and the second block .28 is substantially greater than the total length of the lower end faces of the first block 26 and the second block 28 (L1). And L2), so that the wind generated by the fan 14 can provide the rising thrust through the main body 24. On the other hand, in order to make the wind generated by the fan 14 form a flow field capable of providing a rising thrust quickly on the surface of the main body 24, the curvature of the upper end surface 261 of the first block 26 is substantially larger than that of the second block 28. The curvature of the upper end face 281, so that the airfoil blade 20 can be pivoted relative to the frame 18 while being propelled by the wind of the fan 14 while simultaneously generating sufficient ascending thrust to allow the backflow prevention mechanism 16 to be quickly opened to enhance the fan assembly 1〇 散 7 M418980 Thermal efficiency. In addition to this, the two side surfaces of the main body 24 of the airfoil blade 20 may be provided with a -bump 243, respectively. When the airfoil blade 2 turns relative to the frame 18, the projection 243 can be used to contact the frame 18 and slide relative thereto. The function of the bumps is to prevent a large area of surface contact or line contact between the airfoil blades 2G and the frame 18, that is, the bumps 243 can provide a point contact between the airfoil blades 2 and the frame 18, so The friction between the airfoil blade 2G and the frame 18 is reduced to improve pivoting performance. As shown in Fig. 4, two stops 181 may be provided on the frame 18. Two stop stops 181 can be used to limit the rotation of the airfoil blades 2 于 to limit the rotation of the airfoil blades plus the opposite frame 18 to a predetermined range to prevent the airfoil blades 2 The rotation of the frame 18 exceeds a predetermined range of angles. For example, the range of rotation of the airfoil blade 2 () relative to the frame 18 is between zero and ninety degrees. When the airfoil blade 2 is at an angle of ninety degrees with respect to the frame, as shown in Fig. 2, the backflow prevention mechanism 16 is fully opened, so that the wind generated by the fan 14 can quickly remove heat; when the film 20 is relatively When the central angle of the frame 18 is zero degrees, as shown in Fig. 3, the backflow prevention mechanism 16 is completely closed to prevent the external air with heat from flowing back to the inside of the carrier 12 via the frame wood 18. Further, the airfoil blade 2 〇 optionally includes a reinforcing rib 3G which is disposed on the main body 24 at a position corresponding to the rotating shaft 22. The reinforcing rib 3 is used to increase the structural strength of the body and the rotating shaft κ to prevent it from being damaged by long-term use or wind blow. Compared with the prior art, the airfoil blade and the fan device of the present invention adopt a design in which the curvature of the upper end surface is greater than the curvature of the lower end surface, so that when the airflow passes through the airfoil blade f, it can be statically pressed by the end faces. In addition, the rotating shaft of the blade is disposed in the middle of the main body, so the fan can overcome the gravity of the airfoil blade by providing less eight forces, and the wind provided by the fan can be simultaneously generated. The powerful ascending thrust is more helpful in pushing the airfoil blade relative to the frame to improve the heat dissipation efficiency of the fan unit. Therefore, the airfoil of the present invention: the blade and the fan device can effectively open the airfoil blade of the anti-back mechanism without increasing the rotation speed of the fan, so that the utility model has the advantages of reducing noise and reducing energy consumption, and applying for the special application according to the creation Should be covered by this creation. The above description is only for the uniform variation and modification of the preferred range of the present invention. [Schematic Description] FIG. 1 is a schematic diagram of the prior art anti-backflow mechanism. Fig. 2 and Fig. 3 are respectively schematic diagrams showing the fan device in different modes of operation. The =4 picture is a cross-sectional view of the wind of the creation. = The schematic view of the appearance of the airfoil blade of the present embodiment is a cross-sectional view of the airfoil of the creation. [Main description of the symbols] 10 Fan unit 12 14 Fan 16 18 Frame 181 20 Airfoil blade 22 Carrier anti-reflux mechanism Stop block rotation axis M418980 221 Frame connection end 24 Main body 241 Upper end surface 242 Lower end surface 243 Bump 26 One block 261 Upper end surface 262 Lower end surface 28 Second block 281 Upper end face 282 Lower end face 30 Reinforcing rib 50 Backflow prevention mechanism 52 Outer frame 54 Blade L1 Lower end face length L2 of the first block Lower end L3 of the second block Length of the end face length of a block above the length of the end face of the second block