1355458 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種散熱風扇，特別是指一種可平衡 轉動的單定子外極式散熱風扇。 【先前技術】 了部分元件），現有 11、一枢設於該殼 參閱圖1、2(為方便說明圖1中省略 的單定子外極式散熱風扇1包含一殼座1355458 IX. Description of the Invention: [Technical Field] The present invention relates to a cooling fan, and more particularly to a single-stator external-pole cooling fan that can be balanced and rotated. [Prior Art] Some components), the existing one, one pivoted to the case Referring to Figures 1, 2 (for convenience of illustration, the single-stator external-pole cooling fan 1 omitted in Figure 1 includes a housing
座11内的扇輪單元12、-設置於該殼座U上而能控制該 扇輪單it 12啟動的電路板13,及1置於該殼座^上而 能驅使該扇輪單元12產生旋轉之定子14。 該扇輪單元12具有-錄121…與該輪轂121結合 之轉動軸122、多數㈣狀地間隔設置於該輪穀121周面上 的扇葉123 ’以及一環設於每一扇葉123外端緣上的磁鐵環 124 〇 «亥疋子14疋與該電路板13電連接，當該電路板丨3通 電後，该定子14便會被通電激磁，而與該扇輪單元12之 磁鐵環124產生磁性感應互斥，進而驅動該扇輪單元12產 生旋轉。 現有單定子外極式散熱風扇1由於僅利用設置於該扇 輪單7L 12之外周緣的單—定子14與磁鐵環124所產生的 磁力互斥而驅動該扇輪單元12轉動由於磁力互斥所產生 的推力僅作用於該扇輪單元12鄰近該定子14的磁鐵環124 外側緣，使該扇輪單元12的受力不平均，造成該扇輪單元 12會產生如圖2中假想線所示的傾斜轉動，不但使得該扇 5 輪單元12於轉動時會容易產生偏擺而比較不穩定且亦會 於轉動時產生噪音，更會大幅縮短該單定子外極式散熱風 扇1的使用壽命。 【發明内容】 因此’本發明之目的，即在提供一種可以減少噪音， 並延長❹壽命之可平衡轉動的單定子外極式散熱風扇。 於是’本發明可平衡轉動的單定子外極式散熱風扇是 包含-框架單元、—扇輪單S、—驅動單元，及一平衡單 元。 該框架單元包括-底座ϋ設於該底座上的中心 軸。該扇輪單元包括-枢設於該中心轴上的輪毅、多數片 由該輪穀外周緣間隔向外延伸的扇葉，及-環設於所述扇 葉外周緣的磁鐵環。 <4驅動單70包括一固設於該底座上的電路板，及一電 妾X電路板的磁極柱，其中，該磁極柱係、設置於該磁鐵 卜周緣該平衡單兀包括至少一個設於該磁鐵環外周緣 而與該磁極柱相間隔地設置於該底座上的導磁體。 該磁極柱通電後產生交變磁場，與該磁鐵環的磁力相 而推動4扇輪轉動，而該導磁體則對該磁鐵環產生 吸力，使該扇輪單元處於平衡轉動的狀態。 a本發月之功效在於利用該導磁體對該扇輪單元之磁鐵 %所產生的吸力拉動該磁鐵環’使該扇輪單元處於平衡轉 :的狀態，不但可以使該扇輪單_轉動更為平順，有效 減少扇輪單元轉動時所發出的噪音，更可以延長該單定子 外極式散熱風扇之使用壽命。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之二個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖3與圖4(為方便說明，圖3中省略了部分的元 件），本發明可平衡轉動的單定子外極式散熱風扇2之第一 較佳實施例包含一框架單元21、一扇輪單元22、一驅動單 元23，及一平衡單元24。 s玄框架單元21包括一底座211、·一凸設於該底座211 上的中心軸212,及一蓋設於該底座211上的殼蓋213。該 扇輪單元22包括一樞設於該中心軸212上的輪轂221、多 數片由s亥輪穀221外周緣間隔向外延伸的扇葉222，及一環 設於所述扇葉222外周緣的磁鐵環223。 該驅動單元23包括一固設於該底座211上的電路板 231，及一電連接該電路板231的磁極柱232，其中，該磁 極柱232係设置於該磁鐵環223外周緣；該平衡單元24包 括一個設於該磁鐵環223外周緣而與該磁極柱232相間隔 地設置於該底座211上的導磁體241，該導磁體241是位於 該驅動單元23之磁極柱232的相對側。於本較佳實施例中 该導磁體241是一磁鐵。 該磁極柱232通電後產生交變磁場，與該磁鐵環223 1355458 的磁力相斥而推動該扇輪單元22轉動，而該導磁體241則 於該磁極柱232的相對側對該磁鐵環223產生吸力，以避 免該扇輪單元22相反於該磁極柱232的一側緣因該磁極柱 232的推力而發生傾斜，使該扇輪單元22能處於轉動平衡 的狀態，進而使該扇輪單元22的轉動更為平順，以降低轉 動叶所發出的嗶音，並有效延長該單定子外極式散熱風扇2 之使用壽命。 參閱圖5(為方便說明，圖5中省略了部分的元件），本 發明可平衡轉動的單定子外極式散熱風扇2的第二較佳實 施例，大致上是與該第一較佳實施例相同，包含一框架單 兀21、一扇輪單元22、一驅動單元23,及一平衡單元24 ，其中不相同之處在於：該平衡單元24包括二個設置於該 磁鐵環223外周緣而與該磁極柱232相間隔地設置於該底 座211上的導磁體241，該二導磁體241與該磁極柱232是 等角度地間隔環設於該磁鐵環223外周緣，利用該二導磁 體241的吸力避免该扇輪單元22相反於該磁極柱232的一 側緣因該磁極柱232的推力而發生傾斜，使該扇輪單元22 忐處於轉動平衡的狀態，降低轉動時所發出的噪音，並有 效延長該單定子外極式散熱風扇2之使用壽命，提供一種 不同於該第一較佳實施例的實施態樣。 綜上所述，本發明可平衡轉動的單定子外極式散熱風 扇2，將該平衡單元24的導磁體241是與該磁極枉232對 應設置於該底座211上，利用該導磁體241的吸力與該磁極 柱232的推力相配合，使該扇輪單元22能處於轉動平衡的 8 1355458 狀態’進而使該扇輪單元22的轉動更為穩定平順而不會產 生偏擺，以降低轉動時所發出的噪音，並有效延長整體單 定子外極式散熱風扇2的使用壽命，故確實能達成本發明 之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾皆仍 屬本發明專利涵蓋之範圍内。The fan wheel unit 12 in the seat 11 is disposed on the housing U to control the circuit board 13 of the fan wheel unit 12, and the 1 is placed on the housing to drive the fan unit 12 to be generated. Rotating stator 14. The fan wheel unit 12 has a rotating shaft 122 coupled to the hub 121, a plurality of blades (four) spaced apart from each other on the circumferential surface of the wheel 121, and a ring disposed at the outer end of each of the blades 123. The magnet ring 124 on the edge is electrically connected to the circuit board 13. When the circuit board 3 is energized, the stator 14 is energized and the magnet ring 124 of the fan unit 12 is energized. Magnetic induction is mutually exclusive, which in turn drives the fan wheel unit 12 to produce rotation. The existing single-stator external-pole cooling fan 1 drives the fan-wheel unit 12 to rotate due to the mutual exclusion of the magnetic force generated by the single-stator 14 and the magnet ring 124 disposed on the outer periphery of the fan-single 7L 12 due to the mutual exclusion of the magnetic force. The generated thrust acts only on the outer edge of the magnet ring 124 of the stator unit 12 adjacent to the stator 14, so that the force of the fan unit 12 is uneven, causing the fan unit 12 to produce an imaginary line as shown in FIG. The tilting rotation shown not only makes the fan 5 wheel unit 12 easy to yaw when rotating, but also is unstable and also generates noise during rotation, and the service life of the single stator external pole type cooling fan 1 is greatly shortened. . SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a balanced single-stator external-pole cooling fan that can reduce noise and extend the life of the crucible. Thus, the single-stator external-pole heat-dissipating fan of the present invention which can be balanced and rotated is a-frame unit, a fan-single S, a drive unit, and a balance unit. The frame unit includes a central shaft that is mounted on the base. The fan wheel unit includes a wheel pivotally disposed on the central axis, a plurality of blades extending outwardly from the outer periphery of the wheel valley, and a magnet ring disposed around the outer periphery of the blade. <4 drive unit 70 includes a circuit board fixed on the base, and a magnetic pole column of an electric X circuit board, wherein the magnetic pole column is disposed on the periphery of the magnet, and the balance unit includes at least one A magnetizer disposed on the outer periphery of the magnet ring and spaced apart from the pole post. When the pole is energized, an alternating magnetic field is generated, and the magnetic force of the magnet ring is used to push the four wheels to rotate, and the magnetizer generates suction force to the magnet ring, so that the fan unit is in a state of balanced rotation. a function of the present month is to use the magnetizer to pull the magnet ring of the fan unit of the fan unit to pull the magnet ring 'to make the fan wheel unit in a state of balance rotation: not only can the fan wheel be rotated _ In order to smooth, the noise generated by the rotation of the fan wheel unit is effectively reduced, and the service life of the single stator external pole cooling fan can be extended. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to FIG. 3 and FIG. 4 (some components are omitted in FIG. 3 for convenience of explanation), the first preferred embodiment of the single-stator external-pole cooling fan 2 of the present invention capable of balancing rotation comprises a frame unit 21 and a fan. The wheel unit 22, a driving unit 23, and a balancing unit 24. The sinusoidal frame unit 21 includes a base 211, a central shaft 212 protruding from the base 211, and a cover 213 that is disposed on the base 211. The fan wheel unit 22 includes a hub 221 pivotally mounted on the central shaft 212, a plurality of blades 222 extending outwardly from the outer periphery of the s wheel valley 221, and a ring disposed on the outer periphery of the blade 222. Magnet ring 223. The driving unit 23 includes a circuit board 231 fixed on the base 211, and a magnetic pole 232 electrically connected to the circuit board 231. The magnetic pole 232 is disposed on the outer circumference of the magnet ring 223; the balancing unit 24 includes a magnet 241 disposed on the outer periphery of the magnet ring 223 and spaced apart from the pole 232 on the base 211. The magnet 241 is located on the opposite side of the pole 232 of the drive unit 23. In the preferred embodiment, the magnet 241 is a magnet. The magnetic pole 232 generates an alternating magnetic field, and the magnetic force of the magnet ring 223 1355458 repels the rotation of the fan unit 22, and the magnet 241 generates the magnet ring 223 on the opposite side of the pole 232. Suction is applied to prevent the side of the fan unit 22 from being inclined by the thrust of the pole 232 opposite to the side of the pole 232, so that the fan unit 22 can be in a state of rotational balance, thereby making the fan unit 22 The rotation is smoother to reduce the hum of the rotating blade and effectively extend the service life of the single stator external cooling fan 2. Referring to FIG. 5 (some components are omitted in FIG. 5 for convenience of explanation), the second preferred embodiment of the present invention can balance the rotating single-stator external-pole cooling fan 2, which is substantially the same as the first preferred embodiment. For example, the same includes a frame unit 21, a fan unit 22, a driving unit 23, and a balancing unit 24. The difference is that the balancing unit 24 includes two outer peripheral edges of the magnet ring 223. a magnetizer 241 disposed on the base 211 at a distance from the pole 232. The second magnet 241 and the pole 232 are equiangularly spaced apart from the outer circumference of the magnet ring 223. The two magnets 241 are utilized. The suction force prevents the side of the fan unit 22 from being inclined by the thrust of the magnetic pole 232 opposite to the side of the pole 232, so that the fan unit 22 is in a state of rotational balance, and the noise generated during the rotation is reduced. And effectively extending the service life of the single stator outer pole type cooling fan 2, an embodiment different from the first preferred embodiment is provided. In summary, the present invention can balance the rotating single-stator external-pole heat-dissipating fan 2, and the magnetizer 241 of the balancing unit 24 is disposed on the base 211 corresponding to the magnetic pole 232, and the suction force of the magnet 241 is utilized. Cooperating with the thrust of the pole 232, the fan unit 22 can be in a state of rotational balance of 8 1355458', so that the rotation of the fan unit 22 is more stable and smooth without yaw, so as to reduce the rotation. The noise generated and effectively prolonging the service life of the overall single stator outer pole type cooling fan 2 can indeed achieve the object of the present invention. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are all It is still within the scope of the invention patent.
【圖式簡單說明】 園①-俯視圖，說明現有單定子外極式散熱風扇， 其中’省略了部分元件； 圖2是一剖視圖，輔助說明圖j ; 極式：二：圖，說明本發明可平衡轉動的單定子外 ;、n扇之苐-較佳實施例’其中，省略了部分元件[Simple diagram of the drawing] The garden 1-top view illustrates the existing single-stator external-pole cooling fan, in which 'some of the components are omitted; FIG. 2 is a cross-sectional view, and the auxiliary diagram j is shown; the pole type: two: FIG. Balanced rotating single stator; n-fan 苐 - preferred embodiment 'where part of the component is omitted
一 W叫δ凡*j ;及 圖5 β 疋一俯視圖，說明本發明 極式散熱風 十銜轉動的早定子外 羽之第—較佳實施例， 。 /、Τ 瑞略了部分元件 1355458 【主要元件符號說明】 2 ....... •…單定子外極式散 222… …·扇葉 熱風扇 223… …·磁鐵環 21…… •…框架單元 23…· •…驅動單元 211… …底座 231… •…電路板 212… …·中心軸 232… 磁極柱 213… …·殼蓋 24 •… •…平衡單元 22…… •…扇輪單元 241… •…導磁體 221… •…輪轂A W is called δ凡*j; and Fig. 5 is a top view of the first embodiment of the present invention, illustrating a preferred embodiment of the present invention. /, 瑞 瑞 略 Some parts 1355458 [Main component symbol description] 2 ....... •...Single stator external pole dispersion 222...·Fan blade hot fan 223...··Magnet ring 21... •... Frame unit 23...·...Drive unit 211...Base 231...•...Circuit board 212...·Center shaft 232... Magnetic pole 213...··Shell cover 24 •... •...Balance unit 22... •...fan unit 241... •...Guide 221... •...Wheel
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