201038909 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種晶片散熱器之縮口集束氣流裝置，尤 指一種可將風扇所推送出之氣流，經縮口及阻隔片的結構作用 下，同時化解旋散的風向，和形成聚風於中的軸向集束氣流之 裝置。 【先前技術】 〇 〇 按，近年來人們對於晶片散熱器的功能效用，已有越來越 高的要求，因此以軸流風扇為主的送風技術裝置，也顯得曰益 的重要；然而對於軸流風扇功率下的風壓，與風量的相對關 係’以及風場品質對熱交換作業的影響，似乎有被輕忽的態 勢’終使得晶片散熱器的整體效能’因此難有再進步的空間。 按’轴流風扇係與氣體流動方向與傳動轴成平行，利用扇 葉之旋轉推動出氣流者；惟，習用軸流風扇並無法產生一個真 正的轴流氣體，因為圓周運動所產生的量與能，是從外緣向軸 心遞減至零，所以隨著扇葉的旋轉所推送出來的風，自然的聚 集在扇葉的外緣上，其作用推力的方向也跟著朝外而旋出，之 使得愈接近軸心處就愈不會有風；如第五圖所示，即使在軸 風扇（10)之出風口（101)直接套上具有縮口之罩套（1〇2)_ 風也會隨著罩套壁旋吹而出，另外在出風口（1〇ι)還會因虫’ 產生擠壓而急遽的消減風量，不但使得扇葉 此 定的壓流量，而接近轴座OU部仍處於無风的= 白的浪費了電子產品内的寶貴空間’因而成為所有；置中= 無法克服的困擾與障礙。 1 201038909 次按，第一圖A、B所示係習用一種軸流風扇（10)，其各 扇葉（12)係自中心之軸座（11)向外延伸，由於軸座（11) 内容設有馬達等構件，這使得軸座（11)佔有相當大的面積， 因此當扇葉（12)作動旋轉時，位於軸座（11)下之中央熱 區（A)的範圍，愈接近軸座（11)處，則愈無風量，故使得 送風散熱的目的作用，因此而嚴重的降低。 再按，第二圖A、B所示，係習用另一種軸流風扇裝置 (10a)，其係在該軸流風扇（10a)底面增設一具有呈斜錐狀 之導風環體（13)，導引扇葉（12)所產生的空氣流集中吹向 中央軸座（11)所遮蔽的中央熱區（A)，以到達散熱體最趨 近熱源的部分，期能增進散熱效率，此類型見諸於新型第 M259469號專利案中。 而，上揭軸流風扇裝置（10a)導引空氣流吹向中央之 作法，其思考方向是正確的，但，其使用斜錐狀的導風環體 (13)，所能達到的效果可能有限，因其僅是略為改變送風角 度而已，對於軸座（11)下方之遮蔽區域，即中央熱區（A)， 空氣流不易到達，因此散熱效率無法顯著提升，為其未盡完 善之處；故，仍有改進空間。 又按，任何驅動類的產品，皆受制於作用方式的功能， 與量能守恆之原理，因此軸流風扇的產品說明中，不但會將其 額定功率下的轉速及噪音等的性能製作成表格外，還會將風壓 與風量相對的變化繪製成，如第六圖所示曲線圖，其中縱軸表 示風扇的靜壓力（static pressure )，橫軸表示空氣流量 (airflow)° 201038909 而第一圖A、B所不，係公告第1278576號之「增益風 壓之轴流式散熱扇」專利案，其由數個「動葉」所構成之葉輪 ⑼，可轉動的設於外框（22)之基座（23)上，而基座（23) 周緣《又有由放射狀靜葉」所構成之增壓裝置（⑷，藉由葉輪 (21)之動葉相對增加驅風量，及利用該外框（22)之增壓褒 置（24)增加出風風壓，藉以提升整體散熱效率。惟查，前揭 靜葉構成的增壓裝置（24)，不難從風壓與風量相對的變化的曲 線圖中證實’最大輪出風壓相對風量為零，反之最大的輸出風 〇 f其風壓為零。而如參照第六®，按-般業者所製定之性規格 表所例，同一規格之風扇，圖中標示①者使用功率2. 28w，轉 速3400，噪音37.5db ;至圖中標示③者使用功率16w，轉速 2700，噪音32db。再相較同一風扇規格之「增益風壓之轴流式 散熱扇」類型產品，由第七圖所示之曲線圖，查得標示①者使 用功率12. 5w，轉速4900，噪音57. 6db ;至圖中標示③者使用 功率5. 6w，轉速3800 ,噪音50. 3db。由此其所宣稱有提升若 干風壓效果，可對照其使用幾倍數於同規格產品的功率，及轉 ◎ 速上來比較，便完全否決了此結構能夠增壓的說法。 再者隨著高轉速而產生的高噪音，使得此類產品在市面上 常以暴力扇為名；另外此類產品亦未察覺將氣流向中央集中， 而形成軸向集束氣流的重要性，故此設計若做為晶片散熱器之 送風裝置，在功能及效益上若非必要，實在不適用，因此坊間 除改裝外，似乎未見有此組合之散熱器。 另按，第四圖所示’係公告第M314797號之「風扇之滿旋 增壓裝置」專利案，其係將一具有輪較（26)之轉動葉片（27) 設在一扇框（25)内，且該葉片（27)外周緣設有一凸部（28) 201038909 當驅動輪轂（26)轉動，則該葉片Γ 設有基座（23)的-側進人，再帶動流體從扇框（25) 撞擊到該凸部（28)後改變流向：流動’且通過之流體 決位於輪較⑽下之散熱器的中央t⑽側流動，以解 題。惟查，此結構之葉片（27)#^〜發熱區域的散熱問 如第三圖A、B所示相對之靜葉的動型態而其底部沒有諸 況且’該輪較（26)係呈外凸曲線，^ ’所以流體不易集中； ❹ Ο 同步轉動，類似賴眼中心，不·較（26)係隨葉片（27) 的；故尚有改善以1。不易達到預期將風往中間送之目 此外，公告第339173骑， 細〇_號等專利前案，亦揭示884號及公開編號 其並未揭露有關聚風的想法及縮π等特^專利類似構造，惟 【發明内容】 =是，本發明之主要目的，係在提供—種精簡的縮口集束 抓、風裝置，其具有將轴流風扇外旋推送出的風轉變成 向集束氣流，使原本朝外緣旋推而旋散的風力，依據袖流 風扇之壓量變化曲線圖及功率性能表，找出—種能以最短的 距離聚風於轴心的裝置，讓氣流直接作用於受風目標，以增 進晶片散熱習用技術無法達到的效用。 本發明之再-目的’職提供-義口集束氣流裝置， 其具有獨立軸流風機的功能，方便與習用各式散熱器結合 外，並以低廉的製作手段，達到且具改善實質效能之目的者。 為達上述目的’本發明所採用之技術手段包含： 一軸流風扇’具備一框架及裝設在框架之風扇； —縮口罩，係設在該軸流風扇之送風側； 201038909 其特徵在於： 該縮口罩具備一結合面及一罩體，其接近該軸流風扇之 送風側，設有一與其對應之入風口，且其罩體由該入風口外 周緣向内呈收縮狀之出風口，並於該罩體軸心設有一不包括 呈外凸曲線之導流柱； 該縮口罩之出風口（縮口）直徑（D2)的設定標準，係取 該入風口面積（A1)的一半，為出風口面積（A2)，而從（A2)可 得（D2)，即 D2=j|且為±20% ; 〇 又該罩體的高度（H)等於入風口直徑（D1)減（一）該 出風口直徑（D2)的一半且±30%，即H= @^±30% ; 該導流柱外周緣延伸至該罩體内周緣之空間上，設有三 片以上，或兩對以上之對稱軸向分隔片，最好能視風扇之作 用特性，設計成與扇葉轉向成反向渦狀排列狀，俾以建構出 至少三個以上之風壓室；藉此，使風扇旋推進來的風，在經 該縮口罩之限制，將氣流由外圓周收縮聚向轴心；再以導流 柱的分隔下，避免了相互推擠而削減出風流量，據以額定功 〇 率下取用風壓值較高的部份，且無輸出死角的軸向氣流。 較佳實施例，係該等分導流柱設成上寬下窄之倒錐形， 而最佳實施例係包括周緣設成内凹曲線者。 依據前揭特徵，本發明以一縮口罩，且於軸心設有導流 柱及其周緣之分隔片，使氣流由外周緣利用縮口罩把風集中 並改變流向，再藉由軸心之導流柱將扇風轉變成集束氣流。 故，本發明之導流柱具有使氣流導向集束的功效，所以 其周緣特別不包括設成「外凸曲線」，否則氣流會反彈形成亂 流，不會形成軸向集束氣流；據此，本發明可形成一個推力 201038909 離較長且均勻的軸向集束氣流，而且解決了如近距離抽心 吹不到受風目標，或風壓量之不足，安裝_過於龐大，振 動與嚼音等等的料困擾，並且可以在功率耗損最少的情況 下，輕鬆地在風的壓力與流量上取得一個最佳的使用值，並 使效能達到最佳化。 【實施方式】 首先，請參閲第八圖〜第十二圖所示，本發明第一實施 例包含有： © 一軸流風扇（30 )，具備一框架（31)及裝設在框架（31) 之風扇（32)，底緣為送風侧（33);本實施例中，該轴流風 扇（30)可為市售品，尺寸依需求選定。 一縮口罩（40 ) ’係設在該軸流風扇（3〇)之送風侧（33); 而本發明之主要特徵即在於縮口罩（4〇)的設計。本實施例 中，該縮口罩（40)係一體成型，其具備一結合面（41)及 罩體（42)’該罩體（42)係位於結合面（41)下方，其接 近軸流風扇（30)之送風侧（33)，設有一與其對應之入風口 Ο (43)，且該罩體（42)由該入風口（43)由外周緣向内呈收 縮狀之出風口（44)，並於該罩體（42)軸心設有一不包括呈 外凸曲線之導流柱（45);本實施例中，該導流柱（45)係呈 上寬下窄之倒錐形，且其周緣形成内凹曲線（451)，其導流 效果容後說明。但本發明之導流柱（45)特別不包括呈外凸 曲線之形狀，因此種形狀會使徑向送往軸心之氣流反彈，而 無法形成軸向集束氣流。此外，如果該導流柱（45)設成直 控12mm以下之直立柱體，亦可實施。 由於，縮口罩（40)的縮口面積，即該出風口（44)的 201038909 直徑，愈小則罩體（42)内之風壓愈大，而一般做為晶片散 熱用的軸流風扇，只有幾個水柱單位的工作壓力差，而風壓 的變動部很大，所以縮口面積過小，除了徒增風扇非必要之 負荷外，風的流量也會相對的銳減，若以實驗分析，此類風 扇直徑1/2的中心處，壓流量不到1〇^^緣是，本發明為使 縮口罩（40)可以在功率耗損最少的情況，以及考慮了目前 風扇多具有可變轉速的功能下，有效地在的風壓與流量上取 得一個最佳使用值，經不斷推演測試結果，例如軸流風扇（3〇) 〇 之直徑為9cm，則縮口罩（40)之入風口（43)的直徑（D1) 係配合設成9cm，而出風口（44)的直徑（D2)為g=6 4cm， 經濟取用尺寸±20%，約為土lcm，亦即5· 4 7.—為第六圖中 =-風扇尺寸①到③之出風口（44)出風量的最佳值，扣除 損耗取用出風量較佳直徑，最佳者為6. 4cm。亦即該縮口罩 (40)之出風口（44)的面積（A2)限定為該入風口（43) 面積（A1)的—半，為出風口面積（A2)，(A2)= 〇 -^4可得(D2) ’ 即 D2=厚且±2〇%。 進一步，該縮口罩（40)之罩體（42)，須讓風在一定的 ，度空間内’強制呈外旋的作用力線轉成壓力，且為能使一般 晶片散熱用的軸流風扇，都能滿足不超過以上的風力轉換 損2，以達經濟上的使用效益；故，將該罩體（42)的高度⑴ 限疋在等於入風口直徑（D1)減該出風口直徑（⑻的 一半±30%，即H= ^震。舉例來說，人風口直徑（以） 為 9cm，出風口直徑（D2)為 6〇11，則 H=(9 6)/2±3〇%=1 5⑽ 201038909 ±0· 45cm。故以上揭公式所得之出風口直徑（⑻及對應之 罩體高度（Η)為第六圖中同_風扇尺寸①到③之風壓最佳 值’扣除知耗取用之風壓最佳值。 再者，該導流柱（45)外周緣延伸至該罩體（42)内周 緣之工間上，设有二片以上之轴向分隔片（46)，俾以建構出 i少三個以上之壓力室（47)，本實施例所揭示者為四片轴向 分隔片（46)及四個壓力室（47)。 藉助上揭技術手段，該縮口罩（4〇)將氣流由外圓周轉 〇 向軸心、’再以導流柱（45)予以阻隔改變流向。並以分隔片 (46)避免相互推擠而削減出風流量，據以形成均勻之軸向 氣流。 第十三圖所示，係本發明第二實施例，其元件及特徵相 同於第-實施例者以相同圖號表示，其差異性在於：該導流 柱（45)，係呈上寬下窄之倒錐形（452)，故其與第一實施例 呈内凹曲線（451)之導流柱（45 )，皆係作為阻隔改變流向。 第十四圖所示，係本發明第三實施例，其元件及特徵相 〇 同於第—實施例者’以相同圖號表示，其差異在於：該縮口 罩（40)係與該轴流風扇（30)之框架（31) 一體成型且 該導流柱（45)上設有一軸座"9 )，供該風扇（32)組裝在 該框架（31)内。此外，本實施例中，該分隔片（46)係呈 徑向直線對稱排列或等分排列。 第十五圖所示，係本發明第四實施例，其差異性在於： 該刀隔片（46)係設成與風扇（32)呈反向之渦狀對稱排列 或等分排列。 第十六圖所示，係本發明第五實施例，其差異性在於： -10- 201038909 該縮口罩（40)之導流柱（45)及分隔片（46)係一體成型 於該軸流風扇（30)之框架（31)底緣，而結合面（41)及 罩體（42)係獨立一體成型後，再組裝於該框架（μ)下方， 以上第一〜第五實施例，為本發明所能實施之範例，惟， 無論使用何種實施例，其主要技術手段皆相同，且由第八〜 十一圖所揭示者，該轴流風扇（30)及該縮口罩（4〇)之端 角没有數個固定孔（35)、（48)’藉由對應之第一螺栓（34) 穿伸該框體（31)及結合面（41)而固定。且其係可固定在 0 一散熱鰭片（50)之頂面，據以構成如第九圖所示之散熱器 裝置（70)。至於，該散熱鰭片（5〇)具備一肋底板（51)及 複數鰭片（52)所構成，且其可以定位片（53)及其上之定 位孔（531)利用對應之第二螺栓（54)及第三螺栓（55)與 彈簧（56)，將整個散熱器（70)如第十二圖所示，固定在一 主機板（60)上，並將該肋底板（51)之中心貼靠在晶片（61) 上’成為一標準之晶片散熱器使用狀態。 基於上揭構成，本發明以一特殊比例所構成之縮口罩 (40)’在最低的風力轉換損耗下，將軸流風扇（3〇)所送 出的風包圍住’形成「徑向聚風」功能，接著，本發明之 導流柱（45)及分隔板（46)，使氣流轉向收束，形成「袖 向？流」’運用此種「徑向聚風」而「轴向束流」的縮口集 束氣抓裝置’以最佳的氣流直接作用於受風目標，以達最 佳散熱及導流功效。 綜上所述，本發明所揭示之技術手段，綠具「新賴性」、「進 $性」及「可供產業利用」等發明專利要件，祈請釣局惠賜 專利，以勵發明’無任德感。 -11 - 201038909 惟，上述所揭露之圖式、說明，僅為本發明之較佳實施例， 大凡熟悉此項技藝人士，依本案精神範疇所作之修飾或等效變 化，仍應包括本案申請專利範圍内。201038909 VI. Description of the Invention: [Technical Field] The present invention relates to a shrinking and collecting airflow device for a wafer heatsink, and more particularly to a gas flow that can be pushed out by a fan, through the structure of a shrinkage and a barrier sheet. At the same time, the disintegrated wind direction and the device for forming the axial bundled airflow in the wind are formed. [Prior Art] In recent years, people have become more and more demanding for the functional utility of wafer heatsinks. Therefore, the airflow technology device mainly based on axial fans is also very important; however, for the shaft The wind pressure under the flow fan power, the relative relationship with the air volume' and the influence of the wind field quality on the heat exchange operation seem to have a neglected situation, which ultimately makes the overall performance of the wafer heat sink 'so it is difficult to make room for further improvement. According to the 'axial fan system and the gas flow direction is parallel to the drive shaft, the fan blade is used to push the airflow out; however, the conventional axial fan does not produce a true axial flow gas because of the amount of circular motion generated by The energy is reduced from the outer edge to the axis to zero. Therefore, the wind pushed out by the rotation of the blade naturally gathers on the outer edge of the blade, and the direction of the action thrust is also turned out. The closer to the axis, the less wind there is; as shown in the fifth figure, even if the air outlet (101) of the shaft fan (10) is directly fitted with a cover (1〇2) with a shrinkage_ It will also be blown out with the wall of the cover, and the air outlet (1〇ι) will be squeezed by the insects to sharply reduce the air volume, which not only makes the fan blade set the pressure flow, but also close to the shaft seat OU. The Ministry is still in the windless = white wastes valuable space in electronic products' and thus becomes all; centering = troubles and obstacles that cannot be overcome. 1 201038909 Press, the first figure A, B shows an axial fan (10), each fan blade (12) extends outward from the center axle seat (11), due to the shaft seat (11) content It is provided with a motor and the like, which makes the shaft seat (11) occupy a considerable area, so when the blade (12) is rotated, the range of the central hot zone (A) under the axle seat (11) is closer to the axis. At the seat (11), the more airless, the purpose of the air supply heat dissipation, and thus the serious reduction. Pressing again, as shown in the second figure A and B, another axial fan device (10a) is used, which is provided with an air guiding ring body (13) having a tapered shape on the bottom surface of the axial fan (10a). The air flow generated by the guide fan blade (12) is concentratedly blown toward the central hot zone (A) shielded by the central shaft seat (11) to reach the portion of the heat sink closest to the heat source, thereby improving heat dissipation efficiency. The type is found in the new patent No. M259469. However, the above-mentioned axial flow fan device (10a) guides the air flow to the center, and the direction of thinking is correct. However, the use of the inclined air guide ring body (13) can achieve the same effect. Limited, because it only slightly changes the air supply angle. For the shielding area under the axle seat (11), that is, the central hot zone (A), the air flow is not easy to reach, so the heat dissipation efficiency cannot be significantly improved, which is not perfect. Therefore, there is still room for improvement. According to the press, any drive type product is subject to the function of the action mode and the principle of conservation of quantity. Therefore, the product description of the axial flow fan not only forms the performance of the speed and noise under its rated power. In addition, the relative changes in wind pressure and air volume are also drawn, as shown in the sixth graph, where the vertical axis represents the static pressure of the fan and the horizontal axis represents the air flow (airflow) ° 201038909 and the first Figures A and B are not disclosed in the "Axis Flow Cooling Fan for Gain Wind Pressure" of No. 1278576. The impeller (9) consisting of several "moving blades" is rotatably disposed on the outer frame (22). On the pedestal (23), and on the periphery of the pedestal (23), there is a supercharging device consisting of a radial vane ((4), by the moving blade of the impeller (21) relatively increasing the amount of air, and utilizing The pressurizing device (24) of the outer frame (22) increases the wind pressure, thereby improving the overall heat dissipation efficiency. However, it is not difficult to compare the wind pressure and the air volume from the supercharger (24) formed by the front dead blade. The curve of the change confirms that the maximum wind pressure is zero relative to the air volume. On the other hand, the maximum output wind 〇f has a wind pressure of zero. For example, refer to the sixth meter, according to the specifications of the specifications made by the industry, the fan of the same specification, the power of the one used in the figure is 2. 28w, The speed is 3400, the noise is 37.5db; the power consumption is 16w, the speed is 2700, and the noise is 32db. It is compared with the "windshaft cooling fan of gain wind pressure" type of the same fan specification, as shown in the seventh figure. The graph shows that the power of the indicator is 12.5w, the speed is 4900, the noise is 57. 6db; the power used in the figure is 5. 6w, the speed is 3800, the noise is 50. 3db. A number of wind pressure effects can be compared with the power of several times the product of the same specification, and the speed of the turn is compared, which completely vetoes the argument that the structure can be pressurized. Moreover, the high noise generated by the high speed makes Such products are often referred to as violent fans in the market; in addition, such products are not aware of the importance of concentrating the airflow to the center and forming an axial bundled airflow. Therefore, the design is used as a blower for the wafer radiator. And the benefits If it is not necessary, it is not applicable. Therefore, it seems that there is no radiator with this combination except for the modification. In addition, as shown in the fourth figure, the patent of the "Full Fan Pressurization Device" of the M314797 A rotating blade (27) having a wheel (26) is disposed in a frame (25), and a peripheral portion (28) is provided on the outer periphery of the blade (27). 201038909 When the driving hub (26) rotates, Then, the blade 设有 is provided with the side of the pedestal (23), and then the fluid is moved from the framing frame (25) to the convex portion (28) to change the flow direction: the flow 'and the fluid passing through the wheel (10) The central t (10) side of the radiator flows to solve the problem. However, it is checked that the heat dissipation of the blade (27)#^~ heat-generating area of the structure is as shown in the third figure A and B, and the dynamic state of the stationary blade is not at the bottom and the 'round is less (26) Convex curve, ^ 'So the fluid is not easy to concentrate; ❹ 同步 Synchronous rotation, similar to the center of the eye, not (26) with the blade (27); It is not easy to achieve the expectation that the wind will be sent to the middle. In addition, the announcement of the 339173 ride, the 〇 _ _ and other patents before the case, also reveals that the number 884 and the public number did not reveal the idea of gathering wind and shrinking π and other special patents similar Construction, only [invention] = Yes, the main purpose of the present invention is to provide a streamlined constricted buckling wind device that converts the wind that is propelled from the external fan of the axial fan into a bundled airflow. The wind that was originally turned to the outer edge and rotated, according to the pressure curve of the sleeve fan and the power performance table, find out a device that can gather the wind at the shortest distance at the shortest distance, so that the airflow directly acts on the Wind targets to enhance the effectiveness of wafer cooling technology. The re-purpose of the present invention provides a function of an independent axial flow fan, which is convenient to be combined with various conventional heat sinks, and achieves the purpose of improving physical performance with low-cost production means. By. In order to achieve the above object, the technical means adopted by the present invention include: an axial flow fan having a frame and a fan mounted on the frame; a shrink mask disposed on the air supply side of the axial flow fan; 201038909 characterized by: The shrink cap has a joint surface and a cover body, which is close to the air supply side of the axial flow fan, and has a corresponding air inlet, and the cover body is inwardly contracted from the outer periphery of the air inlet, and a guide column that does not include a convex curve is disposed on the axis of the cover; a diameter (D2) of the air outlet (D2) of the shrink cover is set to be half of the area of the air inlet (A1). Air outlet area (A2), and (D2) from (A2), that is, D2=j| and ±20%; 〇The height of the cover (H) is equal to the diameter of the air inlet (D1) minus (1) The diameter of the air outlet (D2) is half and ±30%, that is, H=@^±30%; the outer circumference of the guide rod extends to the space around the circumference of the cover body, and three or more, or two or more pairs are provided. The symmetrical axial separator is preferably designed to be in a reverse spiral arrangement with the fan blades depending on the action characteristics of the fan. Forming at least three or more wind pressure chambers; thereby, the wind that causes the fan to be propelled is limited by the shrink mask, and the airflow is contracted from the outer circumference to the axis; and then the guide column Under the separation, the mutual air flow is avoided to reduce the air flow, and the portion with a higher wind pressure value is obtained at the rated power rate, and there is no axial airflow with a dead angle. In a preferred embodiment, the aliquots are provided with an inverted cone that is narrower in width and width, and the preferred embodiment includes those in which the circumference is set to a concave curve. According to the foregoing feature, the present invention adopts a shrink mask, and is provided with a guide bar and a peripheral separating piece on the axial center, so that the airflow is concentrated by the outer peripheral edge by using the shrink mask to change the flow direction, and then guided by the axial center. The flow column converts the fan wind into a bundled air stream. Therefore, the guide column of the present invention has the effect of guiding the airflow to the bundle, so that the periphery thereof does not particularly include a "convex curve", otherwise the airflow will rebound to form a turbulent flow, and an axial bundle flow will not be formed; accordingly, The invention can form a thrust 201038909 from a long and uniform axial bundle flow, and solves the problem that if the wind is not blown at a close distance, or the wind pressure is insufficient, the installation is too large, vibration and chewing, etc. The material is troublesome, and it is easy to achieve an optimal use value of the wind pressure and flow with the least power loss, and optimize the performance. [Embodiment] First, referring to the eighth to twelfth drawings, the first embodiment of the present invention comprises: an axial flow fan (30) having a frame (31) and being mounted on the frame ( 31) The fan (32) and the bottom edge are the air supply side (33); in this embodiment, the axial flow fan (30) is commercially available, and the size is selected according to requirements. A shrink mask (40) is attached to the air supply side (33) of the axial fan (3); and the main feature of the present invention is the design of the shrink mask (4). In this embodiment, the shrink mask (40) is integrally formed, and has a joint surface (41) and a cover body (42). The cover body (42) is located below the joint surface (41), and is close to the axial flow fan. The air supply side (33) of (30) is provided with a corresponding air inlet port (43), and the air inlet (43) of the cover body (42) is contracted from the outer peripheral edge by the air inlet opening (43) (44) And a guide column (45) not including the convex curve in the axial center of the cover body (42); in the embodiment, the flow guide column (45) is an inverted cone with an upper width and a lower width. And the periphery thereof forms a concave curve (451), and the flow guiding effect is explained later. However, the flow guide column (45) of the present invention does not particularly include the shape of a convex curve, so that the shape causes the airflow that is sent radially to the shaft center to bounce, and the axial bundle airflow cannot be formed. Further, if the guide column (45) is set to an upright column of 12 mm or less, it can be implemented. Because the shrinkage area of the shrink mask (40), that is, the diameter of the 201038909 of the air outlet (44), the smaller the wind pressure in the cover (42), and generally used as an axial fan for heat dissipation of the chip. Only a few water column units have a working pressure difference, and the variation of the wind pressure is large, so the shrinkage area is too small. In addition to the unnecessary load of the fan, the flow of the wind will be relatively sharply reduced. At the center of 1/2 of the diameter of such a fan, the pressure flow rate is less than 1 〇^^, which is the case where the shrinkage cover (40) can be minimized in power consumption, and the fan has a variable speed. Under the function, the best use value is obtained in the wind pressure and flow rate, and the test result is continuously deduced. For example, the axial flow fan (3〇) has a diameter of 9cm, and the air inlet of the shrink cap (40) (43) The diameter (D1) is set to 9cm, and the diameter (D2) of the air outlet (44) is g=6 4cm, and the economical size is ±20%, which is about 1cm, that is, 5·4 7. For the sixth figure, the optimum value of the air outlet (44) of the air outlet (44) of the fan size 1 to 3 is deducted. Preferably the diameter of the wind, who is best 6. 4cm. That is, the area (A2) of the air outlet (44) of the shrink mask (40) is defined as the half of the area (A1) of the air inlet (43), which is the air outlet area (A2), and (A2) = 〇-^ 4 is available (D2) 'that is D2 = thick and ± 2〇%. Further, the cover (42) of the shrink mask (40) is required to allow the wind to force the externally rotating force line into a pressure within a certain degree of space, and to be an axial flow fan capable of dissipating the general wafer. Can meet the wind conversion loss 2 of not more than above to achieve economical use efficiency; therefore, the height (1) of the cover (42) is limited to be equal to the diameter of the air inlet (D1) minus the diameter of the air outlet ((8) Half of ± 30%, that is, H = ^ shock. For example, the diameter of the tuyere is 9cm, and the diameter of the outlet (D2) is 6〇11, then H=(9 6)/2±3〇%= 1 5(10) 201038909 ±0· 45cm. Therefore, the diameter of the air outlet obtained by the above formula ((8) and the corresponding height of the cover (Η) is the same as the optimal value of the wind pressure of the fan size 1 to 3 in the sixth figure minus the deliberate consumption. The optimum value of the wind pressure is taken. Further, the outer circumference of the guide column (45) extends to the inner circumference of the cover body (42), and two or more axial partition pieces (46) are provided. In order to construct a pressure chamber (47) with less than three, the four axial spacers (46) and four pressure chambers (47) are disclosed in the embodiment. In the section, the shrink mask (4〇) turns the airflow from the outer circumference to the shaft center, and then blocks the flow direction by the flow guiding column (45), and cuts the air flow by using the partition piece (46) to avoid pushing each other. According to the thirteenth embodiment, the second embodiment of the present invention has the same elements and features as those of the first embodiment, and the difference is that the diversion is The column (45) is an inverted cone (452) which is wide and narrow, so that it is a flow guiding column (45) having a concave curve (451) as in the first embodiment, and both are used as a barrier to change the flow direction. The fourth embodiment of the present invention, the components and features of which are the same as those of the first embodiment, are represented by the same reference numerals, and the difference is that the shrink mask (40) is associated with the axial flow fan ( 30) The frame (31) is integrally formed and the guide column (45) is provided with a shaft seat "9) for assembling the fan (32) in the frame (31). In addition, in this embodiment, The separator sheets (46) are arranged in a radial line symmetrical arrangement or in an equal division. As shown in the fifteenth embodiment, the fourth embodiment of the present invention is poor. The utility model is characterized in that: the knife spacer (46) is arranged in a spirally symmetric arrangement or an equal division with the fan (32). The sixteenth embodiment is a fifth embodiment of the present invention, and the difference lies in : -10- 201038909 The deflector (45) and the separator (46) of the shrink cap (40) are integrally formed on the bottom edge of the frame (31) of the axial fan (30), and the joint surface (41) and The cover body (42) is integrally molded and then assembled under the frame (μ). The first to fifth embodiments above are examples that can be implemented by the present invention, but no matter which embodiment is used, the main The technical means are the same, and as disclosed in the eighth to eleventh figures, the axial flow fan (30) and the end cap of the shrink cap (4〇) do not have a plurality of fixing holes (35), (48)' The corresponding first bolt (34) is fixed by extending the frame body (31) and the joint surface (41). And it can be fixed on the top surface of the heat sink fin (50) to form the heat sink device (70) as shown in the ninth figure. The heat dissipating fin (5〇) is composed of a rib bottom plate (51) and a plurality of fins (52), and the positioning piece (53) and the positioning hole (531) thereon are provided with corresponding second bolts. (54) and the third bolt (55) and the spring (56), the entire heat sink (70) is fixed on a motherboard (60) as shown in Fig. 12, and the rib bottom plate (51) The center is placed against the wafer (61) to become a standard wafer heat sink. Based on the above-mentioned configuration, the present invention has a shrinkage cover (40) formed by a special ratio to enclose the wind sent by the axial flow fan (3 〇) under the lowest wind conversion loss to form a "radial gather wind" Function, then, the guide column (45) and the partition plate (46) of the present invention converge the airflow to form a "sleeve flow" and use the "radial wind" and "axial beam flow" The shrinking bundle gas gripping device acts directly on the wind target with the best airflow for optimal heat dissipation and flow guiding. In summary, the technical means disclosed in the present invention, green "in the new reliance", "into the sex" and "available for industrial use" and other invention patents, pray for the fishing bureau to give a patent, to invent invention ' No sense of morality. -11 - 201038909 However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention. Those skilled in the art who are familiar with the art, the modifications or equivalent changes made in the spirit of the case should still include the patent application in this case. Within the scope.
-12- 201038909 【圖式簡單說明】 第一圖A係習用一種軸流風扇之立體圖。 第一圖B係習用一種軸流風扇之剖示圖。 第二圖A係習用另一種軸流風扇之分解立體圖。 第二圖B係習用另一種軸流風扇之剖示圖。 第三圖A係公告第1278576號專利之分解立體圖。 第三圖B係公告第1278576號專利之剖示圖。 第四圖係習用軸流風扇加設罩套之示意圖。 〇 第五圖係風扇的靜壓力與空氣流量相對變化曲線圖（一）。 第六圖係風扇的靜壓力與空氣流量相對變化曲線圖（二）。 第七圖係公告第M314797號專利之剖示圖。 第八圖係本發明第一實施例分解立體圖。 第九圖係本發明第一實施例分解組合立體圖。 第十圖係本發明第一實施例剖示圖。 第十一圖係第十圖中11 —11方向之示意圖。 第十二圖係本發明第一實施例之使用狀態參考圖。 Q 第十三圖係本發明第二實施例之使用狀態參考圖。 第十四圖係本發明第三實施例之分解立體圖。 第十五圖係本發明第四實施例之分解立體圖。 第十六圖係本發明第五實施例之分解立體圖。 【主要元件符號說明】 (30) 軸流風扇 (31) 框架 (32) 風扇 -13- 201038909 (33) 送風側 (34) 第一螺栓 (35) 、（531)定位孔 (40) 縮口罩 (41) 結合面 (42) 罩體 (43) 入風口 (44) 出風口 (45) 導流柱 〇 ( 451)内凹曲線 ( 452)倒錐形 (46 )分隔片 (47) 壓力室 (48) 定位孔 (49) 軸座 (50) 散熱鰭片 (51) 肋底板 n (52)鰭片 (53) 定位片 (54) 第二螺栓 (55) 第三螺栓 (56) 彈簧 (60) 主機板 (61) 晶片 (70)散熱器-12- 201038909 [Simple description of the diagram] The first figure A is a perspective view of an axial fan. Figure B is a cross-sectional view of an axial fan. Figure 2A is an exploded perspective view of another axial fan. Figure 2B is a cross-sectional view of another axial fan. Fig. 3A is an exploded perspective view of the publication No. 1278576. Figure 3B is a cross-sectional view of the publication No. 1278576. The fourth picture is a schematic diagram of a conventional axial flow fan with a cover.第五 The fifth figure is the relative change curve of static pressure and air flow of the fan (1). The sixth figure is a graph of the relative static pressure and air flow of the fan (2). Figure 7 is a cross-sectional view of the publication No. M314797. The eighth drawing is an exploded perspective view of the first embodiment of the present invention. The ninth drawing is an exploded perspective view of the first embodiment of the present invention. Figure 11 is a cross-sectional view showing a first embodiment of the present invention. The eleventh figure is a schematic diagram of the 11-11 direction in the tenth figure. Fig. 12 is a view showing a state of use of the first embodiment of the present invention. Q Fig. 13 is a view showing a state of use of the second embodiment of the present invention. Figure 14 is an exploded perspective view of a third embodiment of the present invention. Fig. 15 is an exploded perspective view showing a fourth embodiment of the present invention. Fig. 16 is an exploded perspective view showing a fifth embodiment of the present invention. [Main component symbol description] (30) Axial fan (31) Frame (32) Fan-13- 201038909 (33) Air supply side (34) First bolt (35), (531) Positioning hole (40) Shrink mask ( 41) Joint surface (42) Cover (43) Air inlet (44) Air outlet (45) Guide column 〇 (451) Concave curve (452) Inverted cone (46) Separator (47) Pressure chamber (48 Positioning hole (49) Shaft seat (50) Heat sink fin (51) Rib bottom plate n (52) Fin (53) Positioning piece (54) Second bolt (55) Third bolt (56) Spring (60) Main unit Board (61) wafer (70) heat sink