201235568 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種散熱風扇，尤其是一種能夠控制 扇輪之正反轉時機的散熱風扇。 【先前技術】 目蝻市面上常見之習知散熱風扇大致具有一扇框， 該扇框内設置-基座’該基座結合—馬達，該馬達係用以 驅動扇輪旋轉作動；一般而言，該基座係以數個肋條連 接於該扇框之出風口，當該扇輪驅動氣流通過該出風口時 ，該肋條容易產生風阻，進而降低該散熱風扇之效能。 為此’請參照第丨圖所示，係為中華民國公告第 488497號「風扇增壓導流裝置」新型專利。該風扇增壓 導流裝置9具有一導流裝置91，該導流裝置91之形狀近 似扇葉（即俗稱之靜葉）；又’該導流裝置91可結合於散 熱風扇之出風口，且該導流裝置91與該散熱風扇之扇葉 92呈相對設置；藉此，當該扇葉92導引氣流通該散熱風 扇之出風口時’即可利用該導流裝置91提升該散熱風扇 之風壓。 又’市面上另揭示具有正反轉功能的習知散熱風扇 ’舉例而言，如中華民國新型M388570號「散熱風扇結 構」專利案係揭示—種具有正反轉功能的習知散熱風扇， 該習知散熱風扇包括一風扇葉片、一電機及一控制器。該 控制器可通過該電機控制該風扇葉片反向旋轉或正向旋轉 ’以提供如散熱及自動除塵等兩種功能。 201235568 以上述具有正反轉功能的習知散熱風扇而言，由於 该習知風扇增壓導流裝置.9僅可用以增加散熱風扇之出風 口的風壓，因此，假設該風扇增壓導流裝置9應用於具有 正反轉功能的習知散熱風扇，當具有正反轉功能的習知散 熱風扇驅動氣流通過該風扇之出風口時，確實可利用該習 知風扇增壓導流裝置9提升整體風壓；然而，當具有正反 轉功能的習知散熱風扇反向驅動氣流以進行自動除塵作業 日守，此日守，原先之出風口即轉變為入風功能，而原先入^ 口則轉變為出風功能，由於該風扇原先之入風口並無任何 可提升風壓之設計，故無法有效提升風壓而造成除塵效果 不佳，整體而s，習知風扇增壓導流裝置9用於具有正反 轉功能的習知散熱風扇時，容易造成該散熱風扇於正轉狀 態或反轉狀態的不同情況下，兩者的驅風效果差距過大， 產生如散熱效果極佳，而除塵效果有限之缺點。 【發明内容】 本發明主要目的係提供一種具正反轉功能之散熱風 扇，使該政熱風扇於正轉狀態或反轉狀態的兩種不同情況 下’其驅風效果可趨近於一致。 本發明另一目的係提供一種具正反轉功能之散熱風 扇，係藉由該散熱風扇於兩種旋轉狀態皆具有一致之驅風 效果’使該散熱風扇裝設於電子產品時可不被侷限於唯一 的組裝方式’以有效提升組裝及使用上之便利性。 根據本發明具正反轉功能之散熱風扇，係包含一扇 框組、一控制驅動單元及一扇輪。該扇框組具有一流道， 201235568 該ί道兩端分別設有一第—導風口及-第二導風π，該第 及該第二導風口之間設有—基座，且該第一導風 及該弟二導風口分別設有一第一靜葉組及一第二靜葉 組，邊控制驅動單元具有—定子組、—驅動電路及一正反 轉控制電路，蚊子組結合於該扇減之紐，該驅動電 =電性連接該定子組，該正反轉㈣電路電性連接該驅動 電路；該祕係能賊躺結合於馳_鱗元之定子 【實施方式】 為讓本發明之上述及其他目的、特徵及優點能更明 顯易懂，下文特舉本發明之較佳實施例，並配合所附圖式 ，作詳細說明如下： 請參照第2及3圖所示’本發明具正反轉功能之散 熱風扇至少包含一扇框組1、一控制驅動單元2及一扇輪 3。該扇框組1可供該控制驅動單元2結合；該控制驅動 單元2位於該扇框組1内部；該扇輪3可旋轉地結合該控 制驅動單元2，以便該透過該控制驅動單元2控制該扇輪 3正向旋轉作動或反向旋轉作動。 該扇框組1係由至少一中空框體所構成，該扇框組1 具有一流道11，該流道11之兩端分別設有一第一導風口 111及一第二導風口 112 ;其中該第一導風口 111及該第 二導風口 112之間設有一基座12，且該第一導風口 111 及該第二導風口 112分別設有一第一靜葉組13及一第二 靜葉組14。 201235568 本實施例中，該扇框組1係包含一第一框體la及一 第二框體lb，該第一框體la及該第二框體lb係能夠拆 裝的相互結合，使該第一框體la及該第二框體lb之内部 所形成的空間可相互串接連通以形成該流道11，且該第 一導風口 111及該第二導風口 112分別設於該第一框體201235568 VI. Description of the Invention: [Technical Field] The present invention relates to a heat dissipation fan, and more particularly to a heat dissipation fan capable of controlling the timing of the forward and reverse rotation of a fan wheel. [Prior Art] It is known that a conventional heat-dissipating fan generally has a frame in which a pedestal is coupled to a motor, and the motor is used to drive a fan wheel to rotate; The pedestal is connected to the air outlet of the fan frame by a plurality of ribs. When the fan wheel drives the airflow through the air outlet, the rib is prone to wind resistance, thereby reducing the performance of the heat dissipation fan. To this end, please refer to the new patent of the Republic of China Announcement No. 488497 "Fan Pressurization Diversion Device". The fan-inducing flow guiding device 9 has a flow guiding device 91, and the shape of the guiding device 91 is similar to a fan blade (also known as a stationary blade); and the guiding device 91 can be coupled to the air outlet of the cooling fan, and The flow guiding device 91 is disposed opposite to the fan blade 92 of the heat dissipating fan; thereby, when the fan blade 92 guides the airflow to the air outlet of the cooling fan, the cooling device can be lifted by the flow guiding device 91. Wind pressure. Moreover, the conventional heat-dissipating fan having the function of reversing and reversing is disclosed on the market. For example, the patent system of the "Missing Fan Structure" of the new M388570 of the Republic of China discloses a conventional cooling fan having a forward and reverse function. A conventional cooling fan includes a fan blade, a motor, and a controller. The controller can control the fan blade to rotate in the reverse or forward direction by the motor to provide functions such as heat dissipation and automatic dust removal. 201235568 In the above-mentioned conventional cooling fan with positive and negative reversing function, since the conventional fan boosting flow guiding device .9 can only be used to increase the wind pressure of the air outlet of the cooling fan, it is assumed that the fan is pressurized and diverted. The device 9 is applied to a conventional cooling fan having a forward/reverse function. When a conventional cooling fan having a forward/reverse function drives an airflow through the air outlet of the fan, the conventional fan boosting flow guiding device 9 can be used for lifting. The overall wind pressure; however, when the conventional cooling fan with the forward and reverse function reversely drives the airflow to perform the automatic dust removal operation, the original air outlet is converted into the air inlet function, and the original air inlet is converted into the air inlet function. The function of the wind is changed. Since the original air inlet of the fan does not have any design to increase the wind pressure, the wind pressure cannot be effectively increased and the dust removal effect is not good. Overall, the conventional fan boosting flow guiding device 9 is used. When a conventional cooling fan having a forward/reverse function is used, it is easy to cause the cooling fan to have a large difference in the driving effect between the forward rotation state and the reverse rotation state, such as heat dissipation. If good, the disadvantage of the limited effect of dust. SUMMARY OF THE INVENTION The main object of the present invention is to provide a heat dissipating fan having a positive and negative reversing function, so that the wind blowing effect can be nearly uniform in two different situations of the positive heat state or the reverse state. Another object of the present invention is to provide a heat dissipating fan having a positive and negative reversing function, wherein the cooling fan has a uniform driving effect in both rotating states, so that the cooling fan is not limited to being installed in an electronic product. The only way to assemble 'to improve the ease of assembly and use. According to the present invention, a cooling fan having a forward and reverse function includes a frame group, a control driving unit and a fan wheel. The fan frame group has a first-class road, and the two ends of the road are respectively provided with a first air guiding port and a second air guiding π, and a first base and the second air guiding port are provided with a base, and the first guiding The wind and the second air guiding port respectively have a first vane group and a second vane group, and the side control driving unit has a stator group, a driving circuit and a positive and negative control circuit, and the mosquito group is combined with the fan reduction. The driving circuit is electrically connected to the stator set, and the forward/reverse (four) circuit is electrically connected to the driving circuit; the secret system can be coupled to the stator of the scale element. [Embodiment] The above and other objects, features, and advantages will be apparent from the following description of the preferred embodiments of the invention. The cooling fan of the forward and reverse function includes at least one frame group 1, a control driving unit 2, and a fan wheel 3. The fan frame group 1 is slidable by the control driving unit 2; the control driving unit 2 is located inside the fan frame group 1; the fan wheel 3 is rotatably coupled to the control driving unit 2 so as to be controlled by the control driving unit 2 The fan wheel 3 is rotated in the forward or reverse rotation. The fan frame group 1 is composed of at least one hollow frame body, and the fan frame group 1 has a first-class air channel 111, and a first air guiding port 111 and a second air guiding port 112 are respectively disposed at two ends thereof. A pedestal 12 is disposed between the first air guiding port 111 and the second air guiding port 112, and the first air guiding port 111 and the second air guiding port 112 are respectively provided with a first vane group 13 and a second vane group 14. 201235568 In this embodiment, the fan frame group 1 includes a first frame body 1a and a second frame body 1b. The first frame body 1b and the second frame body 1b are detachably coupled to each other. The space formed by the first frame body la and the second frame body lb may be connected in series to each other to form the flow channel 11, and the first air guiding port 111 and the second air guiding port 112 are respectively disposed at the first framework
la及該第二框體lb，該基座12則位於該第一框體la ; 又’該第一靜葉組13及該第二靜葉組14分別由數個靜葉 所構成，且該第一靜葉組13及該第二靜葉組14各設置於 該第一框體la及該第二框體lb並分別接鄰於該第一導風 口 111及該第二導風口 112，其中該基座12係利用第一 靜葉組13之數個靜葉連接於該第一框體之内側周壁。 又，如第2圖所示之實施例雖揭示該扇框組1係由 一第一框體la及一第二框體化所構成；然而，本發明之 扇框組1仍可依使用者之組裝需求由其他不同數量之框體 所構成，舉例而言，請參照第4圖所示，該扇框組丨亦可 由-第-框體la、一第二框體lb及一第三框體lc所構 成，該第一框體la及第二框體lb之結構特徵與第2圖所 揭示之實施方式大致相同，而該第三框體lc係用以串接 結合於該第一框體la及第二框體lb之間；整體而古，在 不影響該控制驅動單元2及該扇輪3組裝於該扇麵丄内 部的前提條件下，該扇框組i確可由至少—中空框體所構 成，係為所屬技術領域人員可以理解。 該控制驅動單元2係具有—定子組21、—驅動電路 ^-正反轉控制電路23。該定子組21係結合於該扇框 、，且之基座I2，以供柩接該扇輪3 ;該驅動電路Μ電性 201235568 動電22子'且* 21 ’ 5亥正反轉控制電路23 電性連接該驅 二错此’該正反轉控制電路23即可透過該駆動 輕3之正反轉。料，躲㈣路22及 正反23可封裝為—積體電路⑽。 該控制驅動單元2之定 =2i㈣可旋轉地結合於 疋千、、且21，又，該輪轂31之外周面 >、片32，以便該控制驅動單元2驅動該輪轂31 4動％ (其原理為彻交變磁場驅動該輪轂w旋轉 ’係所屬技術領域人員可以理解，容不費述），各該葉片 可^引氣机通過該扇框組1之第—導風口⑴及第二 導風口 112。 本發明具正反轉功能之散熱風扇於實際使用時，該 控制驅動單το 2可控舰扇輪3正向旋轉或反向旋轉，藉 以選擇令該扇框組i之第—導風口 m作為出風口，或者 令該扇框組1之第二導風σ 112作為出風口 ；因此，本發 明散熱風扇之第-導風口 U1 二導風口 112可依使用 者實際需求提供兩種不同功能，例如：該第一導風口 m 及第二導風口 m皆可用以作為散熱用途（即正向旋轉時 可對一特定熱源進行散熱，反向旋轉時亦可對另一特定熱 源散熱又或者’該第-導風口 lu可心作為散熱用 途，該第二導風口 112則可用以作為除塵用途。 舉例而言’本發明具正反轉功能之散熱風扇可结合 於一電子產品，並將該扇框組丨之第一導風口 πι朝=二 電子產品於運作過程中容易產生熱源之部位；當該電;= 品於運作過程中產生熱源時，該控制驅動單 ' f 2之正反轉 201235568 :Ϊ: 2223可發出一控制訊號至該驅動電路22，以供該 二動該定子組21產生—磁場，藉由該磁場即 或正向_ :熱源，預一 風二，第—導風°⑴係作為出風口用途，該第二導 112係作為入風口用途。 用後又^本發明具正反轉功能之散熱風扇於長時間使 框电1 一界空間之氣流所夾帶的灰塵亦容易堆積於該扇 节=例如：第一導風口 111、第二導風口 m、 車；3之數個葉片32、……等位置；此時，該控制驅動 之正反轉㈣電路23可發出—控制訊號至該驅動 ，路22，以供該驅動電路22驅動該定子組21產生一磁 ^ =由雜制訊號的改變，該磁場亦可進—步推斥該扇 ^ ίΓ二方向旋轉（與前述第—方向相反，如正向旋 2 =)，使該扇框組1内部之氣流與原先該扇輪 3進仃散熱時所產生之氣流的流動方向相反，以便經由該 導風口 m引人氣流並反向通過該流道u及該第二 導風口 112，進而使堆積在該扇框組1内部之灰塵可隨著 外界雜’確_扇桓ι内部不會堆積 過夕灰塵，整體而言，在本實施财，該第—導風口⑴ 係作為入風口用途，該第二導風口 112係作為出風口用途 〇 201235568 風戶f之結構特徵，本發明具正反轉功能之散熱 風扇的主要特點在於··該扇框組i之第—導風口⑴及第 2風:112皆設有該第—靜葉組13及第二靜葉組μ ; 因此，當該第-導風口 ln作為出風口時，該第一靜葉组 13可用以提升通過該第一導風口⑴之氣流的風虔，同 樣地’當該第二導風口 112作為出風口時，該第二靜葉組 14亦可用以提升通過該第二導風口 ιΐ2之氣流的風麼。 一然而’當該第-導風口 m作為出風口時，位於該第 -‘風口 112之第一靜葉組14可能會影響本發明散熱風 扇之進風效果，·反之，當該第二導風口 112作為出風口 時，位於該第一導風口⑴之第一靜葉組Η同樣可能會 影響本發明散熱風扇之進風效果；因此，本發明具正反轉 功能之，熱風扇的主要設計概念，係藉由該第一導風口 111及第一‘風口 112各設有該第一靜葉組13及第二靜 葉組14之結構設計，當該第—導風口 lu或該第二導風 口 112作為出風口時，雖然該第二靜葉組14或該第一靜 葉組13可能會略為影響整體進風效果，但在該第一導風 口 111或該第二導風口 112作為出風口時，該第一靜葉組 13或該第二靜葉組μ仍可用以提升本發明散熱風扇之風 壓，因此，使本發明散熱風扇之扇輪3不論是在正轉狀態 或反轉狀態下，兩者的驅風效果可趨近於一致；藉此使該 散熱風扇之第一導風口 111及該第二導風口 112皆用以作 為散熱用途時，不會產生兩者散熱效果差距過大之情形； 又或者，當該散熱風扇之第一導風口 ln作為散熱用途， 第二導風口 112作為除塵用途時，亦不會產生如散熱效果 201235568 極佳，而除塵效果有限之缺點，使本發明散熱風扇之第一 導風口 m及該第二導風σ m戶斤能提供的驅風功能雖非 最it，但其效果皆能達到使用者之需求標準。 更重要的是，由於該散熱風扇於正轉㈣或反轉動 態下具有-致之驅風效果，因此，欲將該散熱風扇結合該 電子產品時，係可選擇令該第一導風口 1Π對位朝向該電 子產品’或者選擇令該第二導風口 112對位朝向該電子產 癱 &。換言之，本發明可不需刻意將特定之導風口對位朝向 攀 _電子產品’以有效避免裝錯而必須拆卸重農之缺點，進 而使該散熱風扇可不被侷限於唯一的組裝方式，以有效提 升組裝及使用上之便利性。 藉由上述本發明具正反轉功能之散熱風扇的結構設 計概念，本發明亦可進一步包含如下所述之至少一附屬結 構特徵或其組合，使本發明具正反轉功能之散熱風扇㈣ 能更趨近於完善，其中： % *在該扇輪3之軸向上，該第一靜葉組π及該第二靜 ^組14的設置方向係不相同，其中所屬技術領域人員更 可針對母一種不同扇輪3之各葉片32角度的不同，適當 碉整該第一靜葉組13及該第二靜葉組14相對於該扇輪3 之軸向的傾斜角度（如第3圖或第5圖所示之第一靜葉組 ^及該第二靜葉組14的傾斜角度係不相同）；藉此，該 第—靜葉組13及該第二靜葉組14可配合所選用之該扇輪 j之各葉片32的角度變化，以因應調整出更佳的結構設 °十，使得該扇輪3不論是在正轉狀態或反轉狀態下，該第 —靜葉組13及該第二靜葉組14所能增加之風壓更大。或忘 —11 — 201235568 者，在该第一靜葉組13及該第二靜葉組14之設置方向不 同的條件下，該第一靜葉組13及該第二靜葉組14的傾斜 角度亦可相同，以方便開模製造，進而降低整體製造成本 〇 〇 π參照第6圖所示，本發明之第一靜葉組13及第二 靜葉組14更可於中央部位各形成一導流部131、141 ;藉 此，不論該第一導風口 m作為入風口或該第二導風口 112作為入風口時，在該扇輪3欲導引外界氣流進入該流 道的過程中，該導流部131、141皆可有利於導引氣流 通過該第—靜葉組及第二靜葉組，以順利進人該流道11 ，進而提升本發明具正反轉功能之散熱風扇的整體散熱效 果或除塵功能。 综上所述，本發明具正反轉功能之散熱風扇確實可 使該散熱闕於正轉狀態歧轉狀態的不同情況下，兩者 的驅風效果可趨於—致’以供於該第—導風口⑴或該第 二導風口 112作為出朗途時，皆可達成使时之需求標 準，且進一步使得本發明可更方便組裝於電子產品。 雖然本發明已利用上述較佳實施例揭示，然其並非 用以限疋本發明’任何熟習此技藝者在不脫離本發明之精 神和I&U之内，相對上述實施例進行各種更動與修改仍屬 本發明所賴之技術鱗，目此本發明之賴範圍當視後 附之申請專利範圍所界定者為準。 201235568 【圖式簡單說明】 第1圖：習知風扇增壓導流裝置之立體外觀圖。 弟2圖.本發明具正反轉功能之散熱風扇之立體分解 圖。 第3圖：本發明具正反轉功能之散熱風扇之組合剖视 圖。 第4圖：本發明具正反轉功能之散熱風扇之扇框組另 一實施方.式的立體分解圖。 φ 第5圖.本發明具正反轉功能之散熱風扇之靜葉於不 同傾斜角度的组合剖視圖。 第6圖：本發明具正反轉功能之散熱風扇另設有導流 部的组合剖視圖。 【主要元件符號說明】 〔本發明〕 1 扇框組 la 第一框體 lb 第二 .框體 lc 第三框體 11 流道 111 第一導風口 112 第二 導風口 12 基座 13 第一 靜葉組 131 導流部 14 第二 靜葉組 141 導流部 2 控制驅動單元 21 定子組 22 驅動 電路 23正反轉控制電路 —13 — 201235568 3 扇輪 31 輪轂 〔習知〕 9 風扇增壓導流裝置 91 導流裝置La and the second frame lb, the pedestal 12 is located in the first frame la; and the 'first vane group 13 and the second vane group 14 are respectively composed of a plurality of vanes, and the The first vane group 13 and the second vane group 14 are respectively disposed on the first frame body la and the second frame body 1b and are respectively adjacent to the first air guiding port 111 and the second air guiding port 112, wherein The pedestal 12 is connected to the inner peripheral wall of the first frame by a plurality of vanes of the first vane group 13. Moreover, the embodiment shown in FIG. 2 discloses that the fan frame group 1 is composed of a first frame body la and a second frame body; however, the fan frame group 1 of the present invention can still be used by the user. The assembly requirements are composed of other different numbers of frames. For example, as shown in FIG. 4, the frame group can also be composed of a - frame-frame la, a second frame lb, and a third frame. The structure of the first frame body 1a and the second frame body 1b is substantially the same as that of the embodiment disclosed in FIG. 2, and the third frame body lc is used for serially bonding to the first frame. Between the body la and the second frame lb; overall, the frame group i can be at least hollow without prejudice to the control drive unit 2 and the assembly of the fan wheel 3 inside the sector The construction of the frame is understood by those skilled in the art. The control drive unit 2 has a stator group 21, a drive circuit, and a forward/reverse control circuit 23. The stator assembly 21 is coupled to the fan frame and the base I2 for splicing the fan wheel 3; the driving circuit is electrically charged 201235568, and the power is 22'' and *21' 5 hai positive reversing control circuit 23 electrically connecting the driver to the second error. The forward/reverse control circuit 23 can be reversed by the positive movement of the swaying light 3. The material, the hiding (four) way 22 and the front and back 23 can be packaged as an integrated circuit (10). The control drive unit 2 is fixed to 2i (four) rotatably coupled to the thousands, and 21, and further, the outer peripheral surface of the hub 31, the sheet 32, so that the control drive unit 2 drives the hub 31 4%. The principle is that the rotating magnetic field drives the wheel w rotation. It can be understood by those skilled in the art that the blade can pass through the first air guiding port (1) and the second guiding portion of the fan frame group 1. Tuyere 112. When the heat-dissipating fan with the forward-reverse function of the present invention is used in actual use, the control drives the single-rotating fan wheel 3 to rotate in the forward or reverse direction, thereby selecting the first air-guiding port m of the fan-frame group i as The air outlet or the second air guiding σ 112 of the fan frame group 1 is used as an air outlet; therefore, the air guiding port U1 and the air guiding port 112 of the cooling fan of the present invention can provide two different functions according to actual needs of the user, for example, The first air guiding port m and the second air guiding port m can be used for heat dissipation purposes (that is, heat can be dissipated to a specific heat source during forward rotation, and heat can be dissipated to another specific heat source in reverse rotation or The air guiding port can be used as a heat dissipating purpose, and the second air guiding port 112 can be used as a dust removing application. For example, the cooling fan with the positive reversing function of the present invention can be combined with an electronic product, and the fan frame group can be combined.第一 第一 第一 = = = = = = = = = = 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二: 2223 can A control signal is sent to the driving circuit 22, so that the two groups of the stator group 21 generate a magnetic field, and the magnetic field, that is, the forward direction _: heat source, the pre-wind 2, the first air guide (1) is used as the air outlet. For the purpose of use, the second guide 112 is used as an air inlet. After use, the heat-dissipating fan with the forward-reverse function of the present invention can easily accumulate dust in the airflow of the space of the frame space for a long time. = for example: the first air guiding port 111, the second air guiding port m, the car; the number of blades 32, ... and the like; at this time, the control drive positive and negative (four) circuit 23 can issue a control signal to the driving , the circuit 22, for the driving circuit 22 to drive the stator group 21 to generate a magnetic ^ = change by the miscellaneous signal, the magnetic field can also step back to the fan ^ Γ two directions of rotation (in contrast to the aforementioned first direction , as in the forward rotation 2 =), the airflow inside the fan frame group 1 is opposite to the flow direction of the airflow generated when the fan wheel 3 is originally cooled, so that the airflow is induced and reversely passed through the air guiding port m. The flow path u and the second air guiding opening 112 are further stacked in the fan frame group 1 The dust inside can be used as the air inlet, and the second air guiding port 112 is used as the air inlet in the present implementation. As a structural feature of the air outlet 〇201235568 wind household f, the main feature of the heat-dissipating fan having the forward-reverse function of the present invention is that the first air-conditioning port (1) and the second air: 112 of the fan-frame group i are provided. The first vane group 13 and the second vane group μ; therefore, when the first air guiding port ln is used as an air outlet, the first vane group 13 can be used to lift the airflow through the first air guiding port (1) Similarly, when the second air guiding port 112 is used as an air outlet, the second vane group 14 can also be used to lift the airflow through the second air guiding port ι2. However, when the first air guiding port m is used as the air outlet, the first vane group 14 located at the first air port 112 may affect the air inlet effect of the cooling fan of the present invention, and vice versa, when the second air guiding port When the air outlet is used as the air outlet, the first stator blade group located in the first air guiding port (1) may also affect the air inlet effect of the heat dissipation fan of the present invention; therefore, the present invention has the function of positive and negative rotation, and the main design concept of the heat fan The first air guiding port 111 and the first air inlet 112 are respectively provided with the first vane group 13 and the second vane group 14 , and the first air guiding port lu or the second air guiding port is designed. When the air outlet is 112, although the second vane group 14 or the first vane group 13 may slightly affect the overall air intake effect, when the first air guiding port 111 or the second air guiding port 112 is used as an air outlet. The first vane group 13 or the second vane group μ can still be used to increase the wind pressure of the cooling fan of the present invention. Therefore, the fan wheel 3 of the cooling fan of the present invention is rotated in a forward or reverse state. The effect of the two can be nearly uniform; thereby making the dispersion When the first air guiding port 111 and the second air guiding port 112 of the heat fan are used for heat dissipation, the difference between the two heat dissipation effects is not excessive; or, when the first air guiding port of the cooling fan is used as the heat dissipation For the purpose of dust removal, the second air guiding port 112 does not have the disadvantage that the heat dissipation effect 201235568 is excellent, and the dust removing effect is limited, so that the first air guiding port m and the second air guiding σ m of the cooling fan of the present invention Although the function of the wind that can be provided by Jin is not the most, its effect can meet the user's demand standard. More importantly, since the cooling fan has a driving effect in the forward rotation (four) or reverse rotation, when the cooling fan is to be combined with the electronic product, the first air guiding port 1 can be selected. The position is toward the electronic product 'or the second air guiding port 112 is aligned to face the electronic calving & In other words, the present invention can eliminate the disadvantages of heavy agriculture by not necessarily deliberately aligning the specific air guiding port toward the climbing electronic product to effectively avoid the error, so that the cooling fan can be not limited to the unique assembly mode, thereby effectively improving Convenience in assembly and use. According to the structural design concept of the heat-dissipating fan having the forward-reverse function of the present invention, the present invention may further comprise at least one accessory structure feature or a combination thereof as described below, so that the heat-dissipating fan (four) having the forward-reverse function of the present invention can More closely, in which: % * In the axial direction of the fan wheel 3, the first vane group π and the second static group 14 are arranged differently, wherein the person skilled in the art can A different angle of each blade 32 of the different fan wheel 3, appropriately adjusting the inclination angle of the first vane group 13 and the second vane group 14 with respect to the axial direction of the fan wheel 3 (as shown in FIG. 3 or The angles of inclination of the first vane group ^ and the second vane group 14 shown in FIG. 5 are different; thereby, the first vane group 13 and the second vane group 14 can be selected for use. The angle of each of the blades 32 of the fan wheel j is changed in order to adjust the better structure setting so that the first stator group 13 and the fan wheel 3 are in the forward rotation state or the reverse rotation state. The second vane group 14 can increase the wind pressure more. Or forgetting - 11 - 201235568, the inclination angles of the first vane group 13 and the second vane group 14 under the condition that the first vane group 13 and the second vane group 14 are arranged differently The same can be used to facilitate mold opening and manufacturing, thereby reducing the overall manufacturing cost. As shown in FIG. 6, the first vane group 13 and the second vane group 14 of the present invention can form a guide at the central portion. The flow portion 131, 141; thereby, when the first air guiding port m is used as the air inlet or the second air guiding port 112 is used as the air inlet, in the process of the fan wheel 3 to guide the outside airflow into the channel, The guiding portions 131 and 141 can facilitate guiding the airflow through the first vane group and the second vane group to smoothly enter the flow channel 11, thereby improving the overall cooling fan of the present invention having a positive reversing function. Cooling effect or dust removal function. In summary, the heat-dissipating fan with the positive-reverse function of the present invention can make the heat-dissipating effect in the different state of the forward-rotation state, and the wind-discharging effect of the two can tend to be - When the air guiding port (1) or the second air guiding port 112 is used as a circumvention path, the demand standard for the time can be achieved, and the invention can be further assembled into the electronic product more conveniently. Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the invention. It is intended that those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the spirit and scope of the invention. It is still the technical scale of the invention, and the scope of the invention is defined by the scope of the patent application. 201235568 [Simple description of the diagram] Figure 1: The stereoscopic appearance of the conventional fan booster. 2, Fig. 2 is an exploded perspective view of the heat dissipating fan with positive and negative reversal functions of the present invention. Fig. 3 is a sectional view showing the combination of the heat radiating fan having the forward and reverse function of the present invention. Fig. 4 is a perspective exploded view showing another embodiment of the fan frame of the heat-dissipating fan of the present invention. φ Fig. 5 is a sectional view showing the combination of the vanes of the cooling fan having the forward and reverse function at different inclination angles. Fig. 6 is a cross-sectional view showing a combination of a heat transfer fan having a forward/reverse function according to the present invention and a flow guiding portion. [Main component symbol description] [Invention] 1 Fan frame group la First frame lb Second. Frame lc Third frame 11 Flow path 111 First air guiding port 112 Second air guiding port 12 Base 13 First static Leaf group 131 guide portion 14 second vane group 141 diversion portion 2 control drive unit 21 stator group 22 drive circuit 23 forward and reverse control circuit - 13 - 201235568 3 fan wheel 31 hub [conventional] 9 fan booster Flow device 91 flow guide