1282392 九、發明說明： 【發明所屬之技術領域】 a本發明係關於一種被動式風扇組件，特別係關於一種具有 前導葉之被動式風扇組件，可有效增加葉輪組所庐 /六 提高能量轉換效益。 又 【先前技術】 利用馬達的轉動而帶動 一般的風扇大都配合一馬達使用 風扇的旋轉，達到散熱的效果。 ^而，習知的風扇結構具有數個缺點，一是扇葉組與馬達 必須配合使用，所以欲利用風扇來違到散熱的效果，搭配一提 供動力的馬達必不可少，故馬達的製造與組裝成本是無法避免 的；二是馬達本身佔有一定體積，即便更進一步簡化其結構， 仍無法有效解決風扇微小化之可能；三是馬達本身需要電力才 能運轉，所以將習知風扇運用在電子系統中時，馬達會消耗一 定的能量來驅動風扇葉片，若是在電子系統中有多處需散熱 時，則不免要安裝多個風扇，如此會增加耗電量，在環保意識 抬頭的今日，實不符節約能源之潮流。 " 本發明即針對上述之缺失而提出一種被動式風扇組件，可 有效提升給風裝置所提供氣流之使用效率，進而 果。以下為本發明之簡要說明。 【發明内容】 、本發明之一目的係在於提供一種被動式風扇組件，其具有 複數個前導葉設置於-葉輪組前方，該複數個前導葉相對於該 葉輪組之“在剖面上具有-傾斜角度，係使經過該複數個前 導葉之氣流能改變流向而近乎垂直地向該葉輪組葉片衝擊，能 有效地帶動葉輪組之旋轉，提高散熱效率。 為達到上述目的，本發明係提供一種被動式風扇組件，其 包括-基座、-樞接在該基座上之葉輪組、以及—位於該葉輪 組刚方且可與該基座結合之導引靜苹座。 1282392 該葉輪組包括一輪轂、複數個環設於該輪轂周圍之從動葉 八1二連接該複數個從動葉片末端之分隔環、複數個環設於該 刀隔％外圍之作功葉片、以及一從該輪轂轴向延伸之轉轴。 - 該基座包括一殼體、一軸承座、以及複數個連接該殻體與 該軸承座之連接件。其中該軸承座内含至少一軸承用以承接該 葉輪組之轉轴。 該導引靜葉座包括一框架、一固定部、複數個環設於該固 定部周圍前導葉、一連接該複數個前導葉末端之固定環、以及 複數個連接該固定環與該框架之支撐件。 其中導引靜葉座之前導葉與該葉輪組之從動葉片之剖面 相對傾斜夾角幾近為垂直，可使進入該前導葉之氣流轉向而近 乎垂直地衝擊該從動葉片，進而帶動該作功葉片轉動。 利用本發明之被動風扇組件的設計，可有效地提升氣流的 使用效率，從而增進散熱效果。 為讓本發明之上述和其他目的、特徵、和優點能更明顯易 懂，下文特舉一較佳實施例，並配合所附圖式，作詳細說明如 下： 【實施方式】 請同時參閱第1、2與4圖，本發明之被動式風扇組件包 括一基座（1)、一承置於在該基座（1)上之葉輪組（2)、以及一位 於該葉輪組（2)前方且可與該基座（1)結合之導引靜葉座（3)。 該葉輪組（2)包括一輪轂（20)、複數個環設於該輪轂周圍之 從動葉片（22)、一連接該複數個從動葉片（22)末端之分隔環 (24)、複數個環設於該分隔環（24)外圍之作功葉片（26)、以及一 從該輪轂（20)軸向延伸之轉軸（28)。 該基座（1)包括一殼體（10)、一軸承座（12)、以及複數個連 接該殼體（10)與該轴承座（12)之肋條〇4)。該軸承座（12)内包含 至少一軸承（16)用以承接該葉輪組（2)之轉軸（28)。其中該軸承 (16)可以為襯套式軸承、滚珠轴承或磁力式轴承皆可，能使該 1282392 轉軸（28)穩定地在該軸承（16)内旋轉即可。該等肋條（14)亦可由 複數個導流葉所取代，可進一步引導氣流的流向。 該導引靜葉座（3)包括一框架（30)、一固定部（32)、複數個 環設於該固定部（32)周圍之前導葉（34)、一連接該複數個前導葉 (34)末端之固定環(36)、以及複數個連接該固定環（36)與該框架 (30)之支撐件（38)。 其中該導引靜葉座（3)之前導葉（34)與該葉輪組（2)之從動 葉片（22)之相對位置如第3圖所示，該前導葉（34)與該從動葉片 (22)之剖面杻對夾角幾近為垂直，可使進入該前導葉（34)之氣流 轉向而近乎垂直地衝擊該從動葉片（22)，進而帶動該作功葉片 (26)轉動。 將本發明之被動式風扇組件運用在一給風系統時，係將該 導引靜葉座（3)與該給風系統中之給風裝置，例如一軸流風扇、 鼓風機等的出風口（4)接合，使該給風裝置所提供之高壓氣流能 夠完全從該前導葉（34)進入。由於該前導葉（34)具有傾斜曲面之 設計，可引導原本軸向進入之氣流轉向，而能更有效地衝擊該 葉輪組（2)之從動葉片（22)。 為能更清楚瞭解本發明之前導葉（34)的優點，請參閱第5A 與5B圖，第5A圖係在未加入前導葉設計時，氣流進入被動式 風扇組件之速度向量示意圖。由於給風裝置所提供的氣流為一 軸向高壓氣流，設其速度為Vin，則該氣流真正能對該從動葉 片（22)有效作功的速度分量僅為V2，可知有很大部分的能量浪 費掉。加入前導葉（34)的設計後，如第5B圖所示，原本轴向氣 流速度Vin順沿著該前導葉（34)之葉面而轉向成為V’in，由於該 前導葉（34)係設計與該從動葉片（22)之夾角為幾近垂直，故絕大 部分的氣流均可直接對該從動葉片（22)作功。當氣流對該從動 葉片（22)所作的功越大，從動葉片（22)能夠帶動作功葉片（26)能 力就越大，而使得作功葉片發揮較佳之散果效能。 由以上敘述可知，本發明之被動式風扇組件能夠有效地提 1282392 高能量轉換，進而提高作功葉片的散熱能力。 以上所述僅為本發明之較佳實施例而已，上述實施例僅係 用來說明而非用以限定本發明之申請專利範圍，本發明之範疇 係由以下之申請專利範圍所界定。凡依本發明申請專利範圍所 作之均等變化與修飾，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖為本發明被動式風扇組件之立體示意圖。 第2圖為本發明被動式風扇組件之立體爆炸圖。 第3圖為第2圖之前導葉與從動葉之相對位置剖面示意 第4圖為本發明被動式風扇組件之剖面示意圖。 第5A圖為未具前導葉之氣流速度分量示意圖。 第5B圖為本發明具前導葉之氣流速度分量示意圖。 【主要元件符號說明】 1 :基座 12 ·轴承座 16 :軸承 20 :輪轂 24 :分隔環 28 :轉軸 30 :框架 34 :前導葉 38 :支撐件 10 :殼體 14 :肋條 2 :葉輪組 22 :從動葉片 26 :作功葉片 3 :導引靜葉座 32 :固定部 36 :固定環 4 :出風口1282392 IX. Description of the invention: [Technical field to which the invention pertains] a The present invention relates to a passive fan assembly, and more particularly to a passive fan assembly having a leading vane, which can effectively increase the energy conversion efficiency of the impeller group. Further [Prior Art] The fan is driven by the rotation of the motor. Most of the fans are used in conjunction with a motor to rotate the fan to achieve heat dissipation. However, the conventional fan structure has several disadvantages. First, the fan blade group and the motor must be used together. Therefore, it is necessary to use a fan to dissipate the heat dissipation effect, and it is indispensable to match a power supply motor, so the manufacture of the motor and The assembly cost is unavoidable. Second, the motor itself has a certain volume. Even if the structure is further simplified, the possibility of miniaturization of the fan cannot be effectively solved. Third, the motor itself needs electricity to operate, so the conventional fan is used in the electronic system. In the middle, the motor will consume a certain amount of energy to drive the fan blades. If there are multiple places in the electronic system to dissipate heat, it is inevitable to install more than one fan, which will increase the power consumption, which is not in the environmental awareness. The trend of saving energy. " The present invention proposes a passive fan assembly for the above-mentioned lack, which can effectively improve the efficiency of use of the airflow provided by the air supply device, and further. The following is a brief description of the invention. SUMMARY OF THE INVENTION One object of the present invention is to provide a passive fan assembly having a plurality of leading vanes disposed in front of an impeller group, the plurality of leading vanes having an "inclined angle" in cross section relative to the impeller group Therefore, the airflow passing through the plurality of leading vanes can change the flow direction and impinge substantially perpendicularly to the impeller group blades, thereby effectively driving the rotation of the impeller group and improving the heat dissipation efficiency. To achieve the above object, the present invention provides a passive fan. An assembly comprising a base, an impeller assembly pivotally coupled to the base, and a guiding static seat positioned adjacent to the impeller assembly and operably coupled to the base. 1282392 The impeller assembly includes a hub, a plurality of rings are disposed around the hub, and the driven blades are connected to the separating ring at the end of the plurality of driven blades, a plurality of working blades disposed at the periphery of the cutter, and an axial extension from the hub The base includes a housing, a bearing seat, and a plurality of connecting members connecting the housing and the bearing housing, wherein the bearing housing contains at least one bearing for bearing a guiding shaft of the impeller group. The guiding vane seat includes a frame, a fixing portion, a plurality of rings disposed around the fixing portion, a front guide vane, a fixing ring connecting the ends of the plurality of leading vanes, and a plurality of connections The fixing ring and the support member of the frame, wherein the guiding vane of the vane seat and the driven vane of the impeller group are nearly perpendicular to each other at an oblique angle, so that the airflow entering the leading vane is turned to be nearly vertical The driven blade is driven to drive the working blade to rotate. By using the design of the passive fan assembly of the invention, the efficiency of the airflow can be effectively improved, thereby improving the heat dissipation effect. To achieve the above and other objects and features of the present invention, The advantages and advantages can be more clearly understood. Hereinafter, a preferred embodiment will be described in detail with reference to the accompanying drawings. [Embodiment] Please refer to Figures 1, 2 and 4, and the passive fan assembly of the present invention. The utility model comprises a base (1), an impeller group (2) placed on the base (1), and a guiding unit in front of the impeller group (2) and capable of being combined with the base (1) Static leaf (3) The impeller group (2) comprises a hub (20), a plurality of driven blades (22) disposed around the hub, and a separating ring connecting the ends of the plurality of driven blades (22). a plurality of rings (26) disposed on a periphery of the spacer ring (24), and a rotating shaft (28) extending axially from the hub (20). The base (1) includes a casing ( 10), a bearing housing (12), and a plurality of ribs 4) connecting the housing (10) and the bearing housing (12). The bearing housing (12) includes at least one bearing (16) for receiving The rotating shaft (28) of the impeller group (2), wherein the bearing (16) can be a bushing bearing, a ball bearing or a magnetic bearing, so that the 1282392 rotating shaft (28) can stably stabilize the bearing (16) The inner ribs (14) can also be replaced by a plurality of guide vanes to further guide the flow of the airflow. The guide vane seat (3) includes a frame (30), a fixing portion (32), a plurality of rings disposed around the fixing portion (32), and a guide vane (34) connected to the plurality of leading vanes ( 34) A retaining ring (36) at the end, and a plurality of supports (38) connecting the retaining ring (36) to the frame (30). Wherein the relative position of the leading vane (34) of the guiding vane seat (3) and the driven vane (22) of the impeller group (2) is as shown in Fig. 3, the leading vane (34) and the driven The profile of the blade (22) is nearly perpendicular to the angle of the pair, and the airflow entering the leading vane (34) is deflected to impinge the driven blade (22) nearly vertically, thereby driving the working blade (26) to rotate. When the passive fan assembly of the present invention is applied to a wind supply system, the guiding vane seat (3) and the air supply device in the air supply system, for example, an air outlet of an axial fan, a blower, etc. (4) Engaging so that the high pressure gas stream provided by the air supply means can enter completely from the leading vane (34). Since the leading vane (34) has a design of an inclined curved surface, the original axially entering airflow can be guided to more effectively impact the driven vane (22) of the impeller group (2). To better understand the advantages of the vanes (34) of the present invention, please refer to Figures 5A and 5B. Figure 5A is a schematic diagram of the velocity vector of the airflow entering the passive fan assembly without the introduction of the leading vane design. Since the airflow provided by the air supply device is an axial high-pressure airflow, and the speed is Vin, the speed component of the airflow that can effectively work on the driven blade (22) is only V2, and it is known that a large portion Energy is wasted. After the design of the leading vane (34) is added, as shown in Fig. 5B, the original axial airflow velocity Vin is turned along the leaf surface of the leading vane (34) to become V'in, since the leading vane (34) is The angle between the design and the driven blade (22) is nearly vertical, so most of the airflow can directly work on the driven blade (22). The greater the work done by the airflow on the driven blade (22), the greater the ability of the driven blade (22) to bring the power blade (26), which allows the working blade to perform better fruiting efficiency. It can be seen from the above description that the passive fan assembly of the present invention can effectively improve the high energy conversion of the 1282392, thereby improving the heat dissipation capability of the work blade. The above description is only the preferred embodiment of the present invention, and the above-described embodiments are only intended to illustrate and not to limit the scope of the invention, and the scope of the invention is defined by the following claims. Equivalent variations and modifications within the scope of the invention as claimed should be within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a passive fan assembly of the present invention. Figure 2 is a perspective exploded view of the passive fan assembly of the present invention. Fig. 3 is a schematic cross-sectional view showing the relative position of the vanes and the follower blades before the second drawing. Fig. 4 is a schematic cross-sectional view showing the passive fan unit of the present invention. Figure 5A is a schematic diagram of the velocity components of the airflow without the leading vanes. Figure 5B is a schematic view showing the airflow velocity component of the front vane of the present invention. [Main component symbol description] 1 : Base 12 · Housing 16 : Bearing 20 : Hub 24 : Separator ring 28 : Rotary shaft 30 : Frame 34 : Front vane 38 : Support 10 : Housing 14 : Rib 2 : Impeller group 22 : Follower blade 26 : Work blade 3 : Guide vane seat 32 : Fixing portion 36 : Fixing ring 4 : Air outlet