201241319 六、發明說明： 【發明所屬之技術領域】 發明領域 於此所論及的本具體實施例係針對一軸向送風機。 I[先前系好;3 發明背景 在許多的例子中，一軸向送風機是用於冷卻電子設 備。在一電子設備中所併入之部件產生的熱量有增加的傾 向，並且必需增進一軸向送風機的冷卻效果。為了增進冷 卻效果，建議增加該軸向送風機的轉速或在一軸方向上堆 疊複數的軸向送風機以增加扇葉壓力或速度壓力。 所沾知的是由—軸向送風機所產生的作業聲音，當操 作軸向送風機時，與轉速的5或6次方成比率地增加。因此， 假如該軸向送風機的轉速增加，則作業聲音亦增加。 於此’當在—般的辦公室或家中使用一電子設備時， 可月t*會有併入该電子設備的一軸向送風機的作業聲音引起 令人不快之噪音的問題。因此，需要降低一軸向送風機的作 業聲曰。因而’建議藉由採用一對轉(contra-rotating)類型的 軸向送風機，以及設計一轉動葉片及一靜止葉片的形狀(例 如，參考曰本專利公開案第4128194號）而降低作業聲音。 一般地，軸向送風機係經設計於一目標操作點處運 轉，該位置係根據該軸向送風機所併入之該設備的一系統 阻抗所設定。該目標操作點係為當該軸向送風機所併入之 該設備的系統阻抗與該轴向送風機的一靜壓-氣流量特性 201241319 交點所取得的一作業狀況。當該軸向送風機係在該目標操 作點處作業時，該軸向送風機的空氣動力學特性係處於最 高的狀況。因此，藉由使用一軸向送風機其在該目標操作 點處操作時作業聲音變小而使作業聲音儘可能地小。 然而，在當該軸向送風機併入該設備時，該設備的系 統阻抗稍微地變化的一例子中，該軸向送風機之實際操作 點係由該目標操作點移動。因此，該軸向送風機的作業聲 音增加係為可能的。實際操作點之該一移動能夠藉由改變 該軸向送風機的一結構而調整以致使該軸向送風機的操作 點與該設備的實際系統阻抗相配合。例如，該目標操作點 可藉由改變一移動葉片及/或一靜止葉片的形狀而移動。 然而，為了改變該軸向送風機之移動葉片及/或靜止葉 片的形狀以符合一設備的系統阻抗，必需準備複數具有不 同形狀的移動葉片以及複數之構成具有不同形狀的靜止葉 片的外殼，俾以在併入配備具有不同形狀的移動葉片及靜 止葉片的軸向送風機時進行調整。該一作業需要一段較長 時間，因此會增加成本。此外，必需準備複數鑄模用以鑄 造該等移動葉片及外殼以準備具有不同形狀的移動葉片及 靜止葉片，其需一極大的成本。 因此，需要發展一技術其只要在該軸向送風機的結構 中利用一簡單改變，即可降低軸向送風機的噪音。 I：發明内容3 發明概要 根據本發明之一觀點，一軸向送風機包括：一移動葉 4 201241319 片其藉由轉動產生氣流，一外殼其容納該移動葉片；以及 一轉接器其可分開地附裝至該外殼，該轉接器包括一配件 部分以配裝至該外殼的一内表面，該轉接器在該外殼的内 表面上構成一突出部分或階梯部分。 根據該上述提及之發明，該轉接器可分開地附裝至該 外殼。因此，不需要針對每一設備而改變該送風機主體。 因為藉由針對每一設備選擇適合的一轉接器能夠試圖降低 噪音，所以能夠針對該設備降低成本。 藉由在附加的申請專利範圍中特別地指出的元件及結 合將能夠了解及達到本具體實施例之目的與優點。 應瞭解的是前述的一般性說明及接下來詳細的說明二 者僅係為示範性解釋，並非為對本發明之限制。 圖式簡單說明 第1圖係為配置具有一紊流產生之階梯部分的一軸向 送風機的一橫截面視圖； 第2圖係為一橫截面視圖圖示在將一轉接器併入一轴 向送風機之前的一狀態； 第3圖係為在該轉接器併入之後該軸向送風機的一橫 截面視圖； 第4圖係為一透視圖圖示在將該轉接器併入該軸向送 風機之前的一狀態； 第5A圖係為該轉接器之一配裝部分的一實例之一圖解； 第5 B圖係為該轉接器之該配裝部分的另一實例之一圖解； 第6圖係為一橫截面視圖圖示在將該轉接器由該軸向 201241319 送風機之一開啟側併入之前的一狀態； 第7A圖係為於第6圖中所圖示該轉接器的一平面視圖； 第7B圖係為於第6圖中所圖示該轉接器的一側視圖； 第8A圖係為配置具有狹縫的一轉接器的一平面視圖； 第8B圖係為配置具有狹縫的一轉接器的一側視圖； 第9A圖係為配置具有斜狹縫的一轉接器的一平面視圖； 第9B圖係為配置具有狹縫的一轉接器的一側視圖； 第10圖係為配置具有一手指防護的一轉接器的一側視圖； 第11圖係為選擇待併入一軸向送風機之一轉接器的一 步驟之一流程圖； 第12A圖係為一圖解指示當一目標操作點未改變時的 四類型之紊流產生階梯部分以及藉由該等紊流產生階梯部 分產生的音壓位準； 第12B圖係為一圖表指示於第12A圖中所指示之每一 狀況的一靜壓-氣流量特性； 第13A圖係為一圖解指示當一目標操作點改變時的四 類型之紊流產生階梯部分以及藉由該等紊流產生階梯部分 產生的音壓位準；以及 第13B圖係為一圖表指示於第13A圖中所指示之每一 狀況的一靜壓-氣流量特性。 C實施方式3 較佳實施例之詳細說明 將相關於該等伴隨之圖式解釋本發明之較佳具體實施例。 例如，發明者發現藉由在外殼的一内表面提供一突出 6 201241319 =:=在轴向送風機外殼的内側氣流中產生棄流 生的操作聲”例如’一軸向風扇的—轴向送風機所產 -軸向送八：圖係為配置具有—紊流產生階梯部分的 軸白运風機的_橫截面視圖。 铃心 _靜止葉片4及一移動葉片6係配置在 錄的-外殼2中。藉由該移動葉片6之/中 箭頭的方向上產m 在第1圖中一 在第1圖中所圖解的軸向送風機中， =:供-階梯部分(或，物或是 …q係為—圓筒狀内表面。配置位在該内表面2a上的 ==分導致該外殼2中該氣流產生奮流。藉此，該轴向 =:，氣流量特性改變，導致由該轴向送風機產 、業聲音降低。考慮到該軸向送風機的作業聲音係由 於該軸向送風機的該靜壓氣流量特性改變而改變(降曰低）， 因為紊流係藉由氣流碰撞該外殼2内側該階梯部份或是突 出部分以及該移動葉片6在該紊流中轉動而產生。 用以產生奮流的該階梯部分或突出部分，例如，可藉 由模塑該外殼2而提供，因此該階梯部分或突出部分係構^ 在該外殼2的内表面2a中。然而，當該階梯部分或突出部分 係一體成型地構成為該外殼2的一部分，為了改變突出^二 的形狀或是踏階梯部分之-高度(位準差異），整個外殼二 需用一不同的外殼替代。因此，發明者考慮到可藉由提供 突出物或階梯部分將一轉接器附裝在該外殼2之該内表面 2a上同時維持該外殼2之該内表面2a為—圓筒狀形式，能夠 201241319 消除該一不便性。 第2圖係為一橫截面梘圖圖示在將一轉接器併入用於 提供一階梯部分進入一軸向送風機之前的一狀態。第3圖係 為在该轉接器併入之後該軸向送風機的一橫截面視圖。第4 圖係為一透視圖圖示在將該轉接器併入該軸向送風機之前 5玄轴向送風機的一狀態。 在第2圖到第4圖中所圖示的該軸向送風機1〇具有一結 構其中一支撐部分14係附裝至具有一圓筒形狀的該外殼12 之—内表面12a，以及一移動葉片16之一轴係經支撐位在該 支撐部分14的一中心部分上。當該移動葉片16轉動時，如 s亥等圖式中所指示在箭頭的一方向上產生一氣流。 在第2圖到第4圖中所圖示的結構中，該轉接器2〇係由 s亥支持部分I4之該側邊配裝至該外殼12之該内表面12a。轉 接器20包括一圓筒狀的配裝部分20a待配裝進入該外殼12 之該内表面12a及一停止件部分20b係位在該配裝部分20a 之—端部側邊上與該配裝部分20a垂直地延伸。該停止件 2〇b大體上具有與位在該軸向送風機1 〇之一端部側邊上的 —凸緣部分l〇a相同的形狀。該停止件20b具有插銷l〇b插入 其中的插銷孔20c。此外，配裝部分20&係配製具有凹口部 分20a用以避免部件自該外殼12延伸以固定該支撐部分14。 當該轉接器20之該配裝部分20a如第3圖中所示地配裝 至該外殼12之該内表面12a時，該停止件部分20b碰撞該軸 向送風機10之該凸緣部分10a。於此狀態下，該配裝部分20a 之尖端係定位在該移動葉片16的鄰近區域’導致藉由該配裝 201241319 部分漁之尖端形成-齋流產生階梯部分。I流係藉位在該 移動葉片16之該鄰近區域中該因而構成的階梯部分所產生。 該配裂部分術之尖端的位置係為停止件部分施碰撞 該軸向送風機H)之凸緣邹分咖的―位置處。因此，藉由在 該配裝部分施之—端部側上提供該停止件部分施，該配 ^卩刀2〇am端可％精確度定位在該外殼以中。亦 即’僅僅Μ將該配裝部分2_人料殼12直至該停止件 部分遍碰撞錄向送風_之凸緣1Ga為止，該配裝部分 20a之尖端可以高精確度定位，從而在該外郎之該内表面 12a上的一精確位置處構成該階梯部分。 e亥階梯部分之兩度與形狀並未限制在第2及3圖中所圖 不者’並且可加以變化同日後察由階梯部分產生的紊流。 由於邊階梯部分之咼度係與該轉接器2〇之該配裝部分2〇a 的厚度相配合’所以該階梯部分之高度可藉由改變配裝部 分20a的厚度加以調整。此外，由於該階梯部分的形狀係與 該配裝部分20a之該尖端的形狀相配合，所以該階梯部分的 形狀可藉由將該配裝部分2〇a之尖端構成為如第5圖中所示 的傾斜表面，或如第5B圖中所示的一彎曲表面而改變。 儘管於第2及3圖中所圖示的該轉接器2〇具有一個形 狀，其係可自構成該支撐部分14的該軸向送風機1〇的該侧 邊插入該外殼12，該轉接器2〇可構成一形狀，其係可自該 相對側邊插入。 第6圖係為一橫戴面视圖圖示在將該轉接器20由該軸 向送風機10之一開啟側插入該外殼12之前的一狀態。於第6 201241319 圖中所圖示該轉接器20A具有一形狀，其係可自該開啟側 (氣流經由其流入的一側邊）插入。特別地，該配裝部分 20Aa，其係配裝至該外殼12之該内表面12a，係較在第2及3 圖中所圖示的該轉接器20之該配裝部分2〇a為短。由於一支 撐部分並未配置位在該軸向送風機10之該開啟側上，該配 裝部分20Aa之該長度係設定較該配裝部分20a之長度為短 一與該支撐部分相對應的部分，因此該配裝部分20Aa之該 尖端係位在接近該移動葉片16的一預定位置。再者，由於 不需讓該配裝部分20Aa在插入該外殼12時通過該支撐部分 14，所以不需對該配裝部分2〇Aa提供凹口部分並且該配裝 部分20Aa可僅為一圓筒形狀。 第7A圖係為轉接器20A的一平面視圖，以及第7B圖係 為轉接器20A的一側視圖。與轉接器20相似，該轉接器20A 有一停止件部分20Ab。當將該配裝部分20Aa插入該外殼12 時，藉由該停止件部分20Ab與該外殼12之開啟側接觸，該 配裝部分20Aa之尖端係位在一預定的位置。 第8A圖係為一轉接器20B的一平面視圖，其係為於第2 及3圖中所圖示該轉接器20的一變化形式。第8B圖係為該轉 接器20B的一側視圖。該轉接器20B之一配裝部分20Ba具有 與轉接器20相似的凹口20d。然而，除了該等凹口部分20d之 外，該配裝部分20Ba係配製具有與該等凹口部分20d有相同 形狀的狹縫20Be。因此，該轉接器20B之該配裝部分2〇Ba係 藉由自該停止件部分20Bb延伸的複數條狀部分20Bf構成。 於此，由於該移動葉片16之轉動，在該外殼12之該内 10 201241319 表面12a的鄰近區域中產生轉向的氣流。於該一例子中，假 若該等條狀部分2 0 B f係於如在第8 B圖中所圖示的該轉接器 20B中該軸方向上延伸的狹縫20Be所構成，則轉向的氣流與 該等條狀部分20Bf干擾，其可為產生噪音的一原因。因此， 如於第9A及9B圖中所圖示，提供相對於軸方向為傾斜的狹 縫20C以構成該轉接器20C中傾斜的條狀部分2〇Cf。該等條 狀部分20Cf的傾斜角可根據由該移動葉片16之轉動產生的 螺旋狀轉向氣流之-角度而確定，因此介於該轉向氣流與 該等條狀部分20Cf之間的干擾係受抑制的，其係由於該轉 向氣流抑制噪音的產生。 應注意的是’如於第10圖中所圖示，可藉由對上述該 等轉接器(例如，該轉接器2GA)提供_手指保護裝置30，該 轉接器可經提供具有-手指保護功能，因此手指無法進入 該軸向送風機的内部。 相關於第η圖，以下說明選擇待併入一轴向送風機的 '轉接器之—步驟。第11圖係為選擇選擇待併人-軸向送 風機的一轉接器之一步驟的一流程圖。 首先，取得待併人—設備的—軸向送風機之-特性(步 =)的以及取得該設備的-系統阻抗(於該設備中相關於一 •的阻力損失X步驟S2)。接著，取得_操作點， =風機係併人於該設備時，該軸向送風機在此 -該作 201241319 該作業聲音係等於或小於該容許值，則可確定並不需要改 ° 4作業聲音（噪音）以及姉向送風機係經駭為-完成 ασ且無改良（步驟S5)。另-方面，假若該作業聲音超過該容 t值可確久的是必需改善該作業聲音（噪音）以及構成上述 提及的奮w產生階梯部分或突丨物（步驟π)。就此而論，事 先準備用以構成該U產生階梯部分或突出物的不同轉接 驟S6)。在將其中之—轉接⑽裝至錄向送風機後， 檢_ =向送風機係併入該設備以及—作業聲音。假若該 作業聲曰（木9 )係等於或小於該容許值，則已併入該轉接器 的該轴向送風機係構成為—完成產品(步驟s5)。 據上述所提及選擇—轉接II的步驟，事先準備具有 不同开V狀的轉接器，並藉由檢查—作業聲音同時改變併入 “轴向送風機十的轉接器能夠發現一最理想的轉接器。 士寺僅藉由將轉接器插入並附裝至該轴向送風機之外 殼，能夠容易地在-精確位置構成«流產生階梯部分或 再者由於該等轉接器係僅插入並配裝至該外殼， 所以該轉接ϋ可容㈣錢成具有不同形㈣轉接器，如 此能夠在-短時間内容易地選擇—合適的轉接器。 將朗找核㈣絲面上構辆上騎提及的资 =生_部分或突出物的—效果。在該上述所提及的且 奮流產生階梯部分或突出物係構成在作為二 =風機的-單級轴向送風機(單一風扇)中。然 W生階梯部分可構成位在具有佈置在—軸方向二平4 的移動葉對轉型絲向送顯(對轉型式風。 12 201241319 二】=移動葉片之間的一位置處構成該紊流產生階梯 中產1 :大出物可在第二(後)級之該移動葉片的鄰近區域 I流’於對轉型式的軸向送風機中該等移動葉片在 ㈣2方向轉動’為了降低該對轉型式轴向送風機之一 通常，對轉型式軸向送風機能夠在—前級送風 。/、後、'及送風機之間被分開。在該一例子中，可自一支 =科的-側邊將該轉接器插入具有該後級移動葉片的該 ?級廷風機。可交替地，該轉接器可自一開啟側(空氣由之 出的-側邊)插入具有該後級移動葉片的該後級送風機。 第以圖指示當四類型((b)到(e))的奮流產生階梯部分 係構成在—對轉型式軸向送風機巾時(標準⑷），其係經設 计具有一0.45m3/min之氣流量以及3〇〇Pa的一靜壓力之一目 標操作點’量測的操作聲音值，未改變該目標操作點。第 12B圖係為_圖表圖示設定位在第以圖中所指示該情況 中該對轉型式軸向送風機的靜壓力_氣流量特性。 _於第12A圖中，“凸面1公厘，，意指該奮流產生階梯部分 寸（位於彳二向上的高度差）係為1公厘。如於第12A圖 ^所® τ於對轉型式軸向送風機提供具有—前級葉輪片 (葉片）、-後級葉輪片（葉片）以及一中間級靜止部分，因此 位於，目標操作點處的—作業聲音變成-預定的聲壓位 ；提供忒紊",L產生突出表面（紊流產生階梯部分)可能是增 加作業聲音的相。在該—例子巾，該目標操作點並未如 於第12B圖中指示般改變。 另方面，第丨3八圖指示當四類型((Μ)到（el))的紊流產 13 201241319 生階梯部分係構成在一對轉型式軸向送風機中時（標準 (a))，其係經設計具有一 0.45m3/min之氣流量以及300Pa的一 靜壓力之一目標操作點，藉由改變該目標操作點至一氣流 量為0.4m3/min以及320Pa的一靜壓力的一目標操作點（標準 (al))，量測的作業聲音值。第13B圖係為一圖表圖示設定位 在第13 A圖中所指示該情況中該對轉型式軸向送風機的靜 壓力-氣流量特性。 如於第13A圖中所指示，當藉由降低氣流量使用該軸向 送風機時，該作業聲音，當構成該紊流產生階梯部分於一 徑向方向上具有一0.2公厘的高度差時，係小於當未提供該 紊流產生階梯部分(標準(al))時該作業聲音。因此，可以發 現的是可僅藉由提供該紊流產生突出表面（紊流產生階梯 部分）降低該作業聲音，未改變前級葉輪片（葉片）、後級葉 輪片（葉片）及一中間級靜止部分的形狀及尺寸。換言之，可 察知的是該作業聲音，其可能當該軸向送風機之目標操作 點已被設計在一特定目標操作點使用時會增加，可藉由提 供紊流產生突出表面（紊流產生階梯部分）而降低。 t圖式簡單說明3 第1圖係為配置具有一紊流產生之階梯部分的一軸向 送風機的一橫截面視圖； 第2圖係為一橫截面視圖圖示在將一轉接器併入一軸 向送風機之前的一狀態； 第3圖係為在該轉接器併入之後該軸向送風機的一橫 截面視圖； 14 201241319 第4圖係為一透視圖圖示在將該轉接器併入該轴向送 風機之前的一狀態； 第5A圖係為該轉接器之一配裝部分的一實例之一圖解； 第5B圖係為該轉接器之該配裝部分的另一實例之一圖解； 第6圖係為一橫截面視圖圖示在將該轉接器由該軸向 送風機之一開啟側併入之前的一狀態； 第7A圖係為於第6圖中所圖示該轉接器的一平面視圖； 第7B圖係為於第6圖中所圖示該轉接器的一側視圖； 第8A圖係為配置具有狹縫的一轉接器的一平面視圖； 第8B圖係為配置具有狹縫的一轉接器的一側視圖； 第9A圖係為配置具有斜狹縫的一轉接器的一平面視圖； 第9B圖係為配置具有狹縫的一轉接器的一側視圖； 第10圖係為配置具有一手指防護的一轉接器的一側視圖； 第11圖係為選擇待併入一軸向送風機之一轉接器的一 步驟之一流程圖； 第12A圖係為一圖解指示當一目標操作點未改變時的 四類型之紊流產生階梯部分以及藉由該等紊流產生階梯部 分產生的音壓位準； 第12B圖係為一圖表指示於第12A圖中所指示之每一 狀況的一靜壓-氣流量特性； 第13A圖係為一圖解指示當一目標操作點改變時的四 類型之紊流產生階梯部分以及藉由該等紊流產生階梯部分 產生的音壓位準；以及 第13B圖係為一圖表指示於第13A圖中所指示之每一 狀況的一靜壓-氣流量特性。 15 201241319 【主要元件符號說明】 2...外殼 20Ab...停止件部分 2a...内表面 20Ba...配裝部分 4...靜止葉片 20Bb...停止件部分 6...移動葉片 20Bf...條狀部分 10...軸向送風機 20Be...狹縫 10a...凸緣部分 20C...狹縫/轉接器 10b...插銷 20Cf...條狀部分 12...外殼 20a...配裝部分/凹口部分 12a…内表面 20b...停止件部分 14...支撐部分 20c...插銷孔 16...移動葉片 20d...凹口 20,20A,20B·.·轉接器 30...手指保護裝置 20Aa...配裝部分 S1-S7···步驟 16201241319 VI. Description of the Invention: [Technical Field of the Invention] Field of the Invention The present embodiment as discussed herein is directed to an axial blower. I [Previously fast; 3 Background of the Invention In many instances, an axial blower is used to cool an electronic device. The heat generated by the components incorporated in an electronic device has an increased tendency and the cooling effect of an axial blower must be enhanced. In order to improve the cooling effect, it is recommended to increase the rotational speed of the axial blower or stack a plurality of axial blowers in the axial direction to increase the blade pressure or the speed pressure. What is known is the operating sound produced by the axial blower, which increases in proportion to the 5 or 6 power of the rotational speed when operating the axial blower. Therefore, if the rotational speed of the axial blower is increased, the work sound is also increased. Here, when an electronic device is used in an office or home, there is a problem that an operation sound of an axial blower incorporated in the electronic device causes an unpleasant noise. Therefore, it is necessary to reduce the operational noise of an axial blower. Thus, it is proposed to reduce the working sound by using a pair of contra-rotating type axial blowers, and designing a rotating blade and a stationary blade shape (for example, refer to Japanese Patent Laid-Open Publication No. 4128194). Typically, the axial blower is designed to operate at a target operating point that is set based on a system impedance of the device to which the axial blower is incorporated. The target operating point is a working condition obtained when the system impedance of the device incorporated by the axial blower intersects with a static pressure-gas flow characteristic of the axial blower 201241319. When the axial blower is operated at the target operating point, the aerodynamic characteristics of the axial blower are at the highest level. Therefore, the work sound is made as small as possible by using an axial blower which operates at the target operating point to make the work sound as small as possible. However, in an example where the system's impedance of the device changes slightly when the axial blower is incorporated into the apparatus, the actual operating point of the axial blower is moved by the target operating point. Therefore, an increase in the operational sound of the axial blower is possible. This movement of the actual operating point can be adjusted by changing a configuration of the axial blower such that the operating point of the axial blower matches the actual system impedance of the apparatus. For example, the target operating point can be moved by changing the shape of a moving blade and/or a stationary blade. However, in order to change the shape of the moving blades and/or stationary blades of the axial blower to conform to the system impedance of a device, it is necessary to prepare a plurality of moving blades having different shapes and a plurality of outer casings constituting stationary blades having different shapes, Adjustment is made when incorporating an axial blower equipped with moving blades and stationary blades of different shapes. This job takes a long time and therefore increases costs. In addition, it is necessary to prepare a plurality of molds for casting the moving blades and the outer casing to prepare moving blades and stationary blades having different shapes, which requires a great cost. Therefore, there is a need to develop a technique which reduces the noise of the axial blower by using a simple change in the structure of the axial blower. I: SUMMARY OF THE INVENTION Summary of the Invention According to one aspect of the present invention, an axial blower includes: a moving leaf 4 201241319 piece which generates air flow by rotation, an outer casing which accommodates the moving blade; and an adaptor which is separably Attached to the outer casing, the adapter includes a fitting portion to fit to an inner surface of the outer casing, the adapter forming a protruding portion or a stepped portion on an inner surface of the outer casing. According to the invention mentioned above, the adapter can be separately attached to the outer casing. Therefore, it is not necessary to change the blower body for each device. Since it is possible to reduce the noise by selecting a suitable adapter for each device, it is possible to reduce the cost for the device. The objects and advantages of the present embodiments will be understood and attained by the <RTIgt; It is to be understood that the foregoing general description and the detailed description BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an axial blower having a stepped portion generated by turbulence; Fig. 2 is a cross-sectional view showing an embodiment of incorporating an adaptor into an axis a state before the blower; Fig. 3 is a cross-sectional view of the axial blower after the adapter is incorporated; Fig. 4 is a perspective view showing the adapter being incorporated into the shaft a state before the blower; FIG. 5A is an illustration of one of the examples of the fitting portion of the adapter; FIG. 5B is an illustration of another example of the fitting portion of the adapter Figure 6 is a cross-sectional view showing a state before the adapter is merged from one of the open sides of the axial 201241319 blower; Figure 7A is the turn illustrated in Figure 6 A plan view of the adapter; FIG. 7B is a side view of the adapter illustrated in FIG. 6; FIG. 8A is a plan view of an adapter configured with a slit; The figure is a side view of an adapter with a slit; the 9A is a configuration with a diagonal slit A plan view of the device; Figure 9B is a side view of an adapter having a slit; Figure 10 is a side view of an adapter having a finger guard; Figure 11 is Selecting a flow chart of a step to be incorporated into one of the axial blowers; FIG. 12A is a diagram indicating four types of turbulent flow generating step portions when a target operating point is not changed and by the The turbulent flow generates the sound pressure level generated by the step portion; the 12B diagram is a graph indicating a static pressure-air flow characteristic of each condition indicated in Fig. 12A; Fig. 13A is a graphical indication when Four types of turbulent flow when a target operating point is changed to generate a stepped portion and a sound pressure level generated by the stepped portion by the turbulent flow; and FIG. 13B is a graph indicating each of the indications indicated in FIG. 13A A static pressure-gas flow characteristic of a condition. C DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be explained in relation to the accompanying drawings. For example, the inventors have discovered that by providing a projection 6 on an inner surface of the outer casing, 201241319 =:= creates an operational sound of abandoning flow in the inner airflow of the axial blower housing, such as an axial fan-axial blower. Production-Axial Transmission Eight: The diagram is a cross-sectional view of a shaft-mounted wind turbine with a turbulent flow generating step portion. The bellows_stationary vane 4 and a moving vane 6 are disposed in the recorded outer casing 2. By the direction of the arrow in the middle/middle of the moving blade 6, in the axial blower illustrated in Fig. 1 in Fig. 1, =: the supply-step portion (or, or the ... a cylindrical inner surface. The == point of the arrangement on the inner surface 2a causes the air flow in the outer casing 2 to generate a flow. Thereby, the axial direction::, the air flow characteristic changes, resulting in the axial blower The sound of production and industry is reduced. Considering that the operation sound of the axial blower is changed due to the change of the static air flow characteristic of the axial blower, the turbulence is caused by the airflow colliding with the inner side of the outer casing 2 a stepped portion or a protruding portion and the moving blade 6 in the turbulence The stepped portion or the protruding portion for generating the flow of the flow is provided, for example, by molding the outer casing 2, and thus the stepped portion or the protruding portion is configured in the inner surface 2a of the outer casing 2 However, when the stepped portion or the protruding portion is integrally formed as a part of the outer casing 2, in order to change the shape of the protruding portion or the height (level difference) of the stepped portion, the entire outer casing 2 needs to be different. The housing is replaced. Therefore, the inventors have considered that an adapter can be attached to the inner surface 2a of the outer casing 2 by providing a projection or a stepped portion while maintaining the inner surface 2a of the outer casing 2 as a cylinder. In the form of a form, it is possible to eliminate the inconvenience of 201241319. Fig. 2 is a cross-sectional view illustrating a state before an adapter is incorporated for providing a stepped portion into an axial blower. Is a cross-sectional view of the axial blower after the adapter is incorporated. Figure 4 is a perspective view showing one of the five mysterious axial blowers before the adapter is incorporated into the axial blower State. In Figure 2 The axial blower 1A illustrated in Fig. 4 has a structure in which a support portion 14 is attached to an inner surface 12a of the outer casing 12 having a cylindrical shape, and a shaft of a moving blade 16 is passed through. The support is located on a central portion of the support portion 14. When the moving blade 16 rotates, an air flow is generated on one side of the arrow as indicated in the pattern of shai, etc. The figures are shown in Figs. 2 to 4 In the illustrated construction, the adapter 2 is fitted to the inner surface 12a of the outer casing 12 by the side of the sill support portion I4. The adapter 20 includes a cylindrical fitting portion 20a to be fitted. The inner surface 12a and the stopper portion 20b which enter the outer casing 12 are fastened to the end portion of the fitting portion 20a so as to extend perpendicularly to the fitting portion 20a. The stopper 2〇b has substantially the same shape as the flange portion 10a positioned on the side of one end of the axial blower 1 。. The stopper 20b has a pin hole 20c into which the pin 10b is inserted. In addition, the fitting portion 20& is configured to have a notched portion 20a to prevent the member from extending from the outer casing 12 to secure the support portion 14. When the fitting portion 20a of the adapter 20 is fitted to the inner surface 12a of the outer casing 12 as shown in Fig. 3, the stopper portion 20b collides with the flange portion 10a of the axial blower 10. . In this state, the tip end of the fitting portion 20a is positioned in the vicinity of the moving blade 16 to cause the step portion to be formed by the tip of the fitting portion of the fishing portion 201241319. The I flow system is generated by the thus formed step portion in the adjacent region of the moving blade 16. The position of the tip of the splitting portion is the position at which the stopper portion collides with the flange of the axial blower H). Therefore, by providing the stopper portion on the end portion side of the fitting portion, the damper 2 〇am end can be positioned with a high degree of accuracy in the outer casing. That is, the tip portion of the fitting portion 20a can be positioned with high precision, so that the fitting portion 2_the human shell 12 can be positioned until the stopper portion is repeatedly collided to the flange 1Ga of the air supply. The step portion is formed at a precise position on the inner surface 12a. The two degrees and shapes of the step portion of the ehai are not limited to those shown in Figs. 2 and 3, and the turbulence generated by the step portion can be observed in the same day. Since the twist of the step portion is matched with the thickness of the fitting portion 2a of the adapter 2', the height of the step can be adjusted by changing the thickness of the fitting portion 20a. Further, since the shape of the stepped portion matches the shape of the tip end of the fitting portion 20a, the shape of the stepped portion can be configured by the tip end of the fitting portion 2A as shown in Fig. 5. The inclined surface shown, or a curved surface as shown in Fig. 5B, changes. Although the adapter 2A illustrated in FIGS. 2 and 3 has a shape, the outer casing 12 can be inserted into the outer casing 12 from the side of the axial blower 1 that constitutes the support portion 14, the transfer The device 2 can be formed into a shape from which it can be inserted. Fig. 6 is a cross-sectional view showing a state before the adapter 20 is inserted into the outer casing 12 from the open side of the axial blower 10. The adapter 20A illustrated in Fig. 6 201241319 has a shape that can be inserted from the opening side (the side through which the airflow flows). In particular, the fitting portion 20Aa is fitted to the inner surface 12a of the outer casing 12, which is the fitting portion 2a of the adapter 20 as illustrated in the second and third figures. short. Since a supporting portion is not disposed on the opening side of the axial blower 10, the length of the fitting portion 20Aa is set to be shorter than the length of the fitting portion 20a by a portion corresponding to the supporting portion. Therefore, the tip end of the fitting portion 20Aa is tied to a predetermined position close to the moving blade 16. Furthermore, since the fitting portion 20Aa does not need to pass through the supporting portion 14 when inserted into the outer casing 12, it is not necessary to provide the fitting portion 2Aa with a notch portion and the fitting portion 20Aa can be only a cylinder shape. Fig. 7A is a plan view of the adapter 20A, and Fig. 7B is a side view of the adapter 20A. Similar to the adapter 20, the adapter 20A has a stopper portion 20Ab. When the fitting portion 20Aa is inserted into the outer casing 12, the tip end of the fitting portion 20Aa is tied at a predetermined position by the stopper portion 20Ab contacting the open side of the outer casing 12. Figure 8A is a plan view of an adapter 20B which is a variation of the adapter 20 illustrated in Figures 2 and 3. Fig. 8B is a side view of the adapter 20B. One of the fitting portions 20B of the adapter 20B has a notch 20d similar to the adapter 20. However, in addition to the notch portions 20d, the fitting portion 20Ba is formed with slits 20Be having the same shape as the notch portions 20d. Therefore, the fitting portion 2〇Ba of the adapter 20B is constituted by a plurality of strip portions 20Bf extending from the stopper portion 20Bb. Here, due to the rotation of the moving blade 16, a directional airflow is generated in the vicinity of the inner surface 10a of the outer casing 12 20121319. In this example, if the strip portions 20 B f are formed by the slit 20Be extending in the axial direction of the adapter 20B as illustrated in FIG. 8B, the steering The air flow interferes with the strip portions 20Bf, which may be a cause of noise generation. Therefore, as illustrated in Figs. 9A and 9B, the slit 20C which is inclined with respect to the axial direction is provided to constitute the inclined strip portion 2〇Cf in the adapter 20C. The inclination angle of the strip portions 20Cf can be determined according to the angle of the spiral steering airflow generated by the rotation of the moving blade 16, so that the interference between the steering airflow and the strip portions 20Cf is suppressed. This is because the steering airflow suppresses the generation of noise. It should be noted that 'as illustrated in FIG. 10, by providing the _ finger protection device 30 to the above-described adapters (eg, the adapter 2GA), the adapter may be provided with - Finger protection, so the fingers cannot enter the inside of the axial blower. With respect to the ηth diagram, the following describes the step of selecting the 'Adapter' to be incorporated into an axial blower. Figure 11 is a flow chart showing the steps of selecting one of the adapters for the person to be connected to the axial blower. First, obtain the characteristics of the equipment-to-shaft (the step-by-step) of the equipment and the system impedance of the equipment (in the equipment related to the resistance loss X step S2). Then, the _ operation point is obtained, and when the fan system is connected to the device, the axial blower is here - the 201241319, the operation sound is equal to or less than the allowable value, and it can be determined that the operation sound is not required to be changed ( The noise) and the blow-by blower are --complete ασ and no improvement (step S5). On the other hand, if the operation sound exceeds the value of the capacity, it is necessary to improve the operation sound (noise) and to form a step portion or a sudden object (step π). In this connection, different transitions S6) are formed to form the U-created stepped portion or protrusion. After loading the transfer (10) to the directional blower, check _ = incorporate the device and the work sound into the blower. If the job sonar (wood 9) is equal to or less than the allowable value, the axial blower incorporated into the adapter is configured to complete the product (step s5). According to the above-mentioned selection-transfer II step, an adapter having a different opening V shape is prepared in advance, and it is found that the optimum is incorporated by the inspection-operation sound simultaneously incorporated into the "axial blower ten adapter". The adapter can only be constructed by simply inserting and attaching the adapter to the housing of the axial blower, which can be easily formed in a precise position to generate a stepped portion or again due to the adapter system. Inserted and fitted to the housing, so the adapter can accommodate (4) money into a different shape (four) adapter, so that it can be easily selected in a short time - the appropriate adapter. Will find the core (four) silk The effect of the upper part of the vehicle or the protrusion mentioned above. The stepped part or the protruding system mentioned in the above mentioned flow is composed of a single-stage axial blower as a two-fan (Single fan). However, the step of the W-segment can be formed in the direction of the transitional wire with a moving leaf arranged in the -axis direction of the two flats (for the transformation of the wind. 12 201241319 II) = between the moving blades The position at which the turbulence is generated produces a step in the middle of production 1: large output In the second (rear) stage of the moving blade adjacent to the area I flow 'in the transitional axial blower, the moving blades rotate in the (four) 2 direction' in order to reduce the pair of transformational axial blowers usually, the transformation The axial air blower can be separated between the front air supply, the rear, and the air blower. In this example, the adapter can be inserted from the side of the branch to the rear stage. Alternatively, the adapter can be inserted into the rear-stage blower having the rear-stage moving blade from an opening side (air-out side). Types ((b) to (e)) of the flow-creating step are formed in the case of a transitional axial blower (standard (4)), which is designed to have a gas flow of 0.45 m3/min and 3 〇之一Pa one of the static pressures of the target operating point 'measured operational sound value, the target operating point is not changed. Figure 12B is the _ chart icon setting bit in the case indicated in the figure Static pressure of the axial blower_gas flow characteristics. _ In Figure 12A, "convex 1 , meaning that the stride part of the stride (the height difference in the second direction) is 1 mm. As shown in Fig. 12A, the τ provides the pre-stage impeller for the transformational axial blower ( Blade), the latter stage impeller blade (blade) and an intermediate stage stationary part, thus located at the target operating point - the working sound becomes a predetermined sound pressure level; providing a turbulent turbulence ", L produces a protruding surface (turbulent flow) The step portion is generated. It may be the phase that increases the sound of the work. In this example, the target operating point is not changed as indicated in Fig. 12B. On the other hand, the third figure shows the four types ((Μ) The turbulent flow to (el) 13 201241319 The stepped part is formed in a pair of transitional axial blowers (standard (a)), which is designed to have a gas flow of 0.45 m3/min and a static of 300 Pa One of the pressure target operating points, the measured work sound value is measured by changing the target operating point to a target operating point (standard (al)) of a static pressure of 0.4 m3/min and 320 Pa. Figure 13B is a graphical representation of the static pressure-gas flow characteristics of the pair of axially-driven blowers in the case indicated in Figure 13A. As indicated in FIG. 13A, when the axial blower is used by reducing the air flow, the working sound, when the turbulent flow generating step portion has a height difference of 0.2 mm in a radial direction, The operation sound is smaller than when the turbulent flow generation step portion (standard (al)) is not provided. Therefore, it can be found that the working sound can be reduced only by providing the turbulent flow to generate the protruding surface (the turbulent flow generating step portion), the front stage impeller blade (blade), the rear stage impeller blade (blade) and an intermediate stage are not changed. The shape and size of the stationary part. In other words, it is known that the operation sound may increase when the target operating point of the axial blower has been designed to be used at a specific target operating point, and the protruding surface may be generated by providing turbulent flow (the turbulent flow generates the step portion). ) and lower. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an axial blower configured to have a stepped portion of turbulent flow; FIG. 2 is a cross-sectional view illustrating the incorporation of an adaptor a state before an axial blower; Fig. 3 is a cross-sectional view of the axial blower after the adapter is incorporated; 14 201241319 Figure 4 is a perspective view of the adapter a state before being incorporated into the axial blower; FIG. 5A is an illustration of one of the examples of the fitting portion of the adapter; FIG. 5B is another example of the fitting portion of the adapter Figure 6 is a cross-sectional view showing a state before the adapter is incorporated from one of the open sides of the axial blower; Figure 7A is illustrated in Figure 6 a plan view of the adapter; FIG. 7B is a side view of the adapter illustrated in FIG. 6; FIG. 8A is a plan view showing an adapter having a slit; Figure 8B is a side view of an adapter having a slit; Figure 9A is a configuration of a slit having a slit A plan view of the connector; Figure 9B is a side view of an adapter having a slit; Figure 10 is a side view of an adapter having a finger guard; Figure 11 A flow chart for selecting one of the steps to be incorporated into one of the axial blowers; FIG. 12A is a diagram indicating four types of turbulent flow generating step portions when a target operating point is not changed and by The turbulence generates a sound pressure level generated by the step portion; Fig. 12B is a graph indicating a static pressure-air flow characteristic for each condition indicated in Fig. 12A; Fig. 13A is a graphical indication Four types of turbulence when a target operating point is changed to generate a stepped portion and a sound pressure level generated by the turbulent flow generating step portion; and FIG. 13B is a graph indicating that it is indicated in FIG. 13A A static pressure-gas flow characteristic for each condition. 15 201241319 [Description of main component symbols] 2... Housing 20Ab... Stopper section 2a... Inner surface 20Ba... Mounting section 4... Still vane 20Bb... Stopper section 6... Moving blade 20Bf... strip portion 10... axial blower 20Be... slit 10a... flange portion 20C... slit/adapter 10b...plug 20Cf... strip Part 12: outer casing 20a... fitting portion/notch portion 12a... inner surface 20b... stopper portion 14... support portion 20c... pin hole 16... moving blade 20d... Notch 20, 20A, 20B·. adapter 30... finger protection device 20Aa... fitting portion S1-S7···Step 16