200944661 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種外極式風扇，特別是指一種單定 子串聯式外極風扇。 【先前技術】 參閱圖1、2，習知之外極式風扇1包含一殼座u、二 上下相間隔地疊設於該殼座11内的扇輪單元、一設置於 該殼座U上而能同時控制該二扇輪單A 12啟動的電路板 ® 13，及**設置於該二扇輪單元12之間的殼座η上而能驅使 該二扇輪單元12產生旋轉之定子單元14。 每一扇輪單元12均具有一輪轂121，一與該輪轂121 、-之轉動轴122、多數輻射狀地間隔設置於該輪轂121周 面上的扇葉123，以及一環設於每—扇葉123外端緣上的磁 鐵環124。 該定子單元14具有一位於上方的第一定子141，以及 一位於下方的第二定子142，該第一定子141 一體延伸形成 ® 有二極柱143，並利用一感應線圈145將該二極柱143予以 連續纏繞，該第二定子142同樣也是一體延伸形成有二極 柱144，並再利用另一個感應線圈丨46將該二極柱丨44予以 連續缠繞，並且上述兩個感應線圈145、146皆是電連接於 該電路板13。 藉由該定子單元14之第一、二定子141、142的各個 極柱143、144是分別以兩個感應線圈145、146予以連續 纏繞’且該第—、二定子141、142之該等極柱143、144 200944661 之極面是分別相對應地面對該二扇輪單元i2之扇葉⑵外 端緣的磁鐵環124,因此當該電路板π通電後，上述兩個 感應線圈145、146便會被通電激磁，而使各個極柱143、 W皆產生磁性1後再與該二扇輪單元12之磁鐵環a# 產生磁性感應互斥，進而驅動該二扇輪單元12產生旋轉。 ❹ ❹ 然而，該外極式風扇1仍有需要進-步改良之處，例 如：該外極式風扇1必需同時具備該第…二定子⑷、 142才能產生作動，無法只利用單—定子來加動，因此 ’對於定子的材料與製造成本上勢必連帶提高；再者，必 需分別纏繞兩個互相連接的感應_ i45、i46，而需連接 5越X第-定子141、142間之距離，因此，會增加線 圈整體長度與材料成本，連帶也會使得整體電路配置較為 複雜。 【發明内容】 因此本發B月之目的，即在提供—種單定子串聯式外 極風扇A有材料與製造成本皆能有效降低、簡化整體電 路配置作業等優點。 於是，本發明單定子串聯式外極風扇，包含一基座、 二相間隔地疊設於該基座上的扇輪單元，及-位於該二扇 輪單元一側的驅動單元。 "亥基座具有上下相間隔且相互連通的一上容置空間及 下谷置工間。該一扇輪單元分別位於該上、下容置空間 中而相間隔地#設於該基座上’每—扇輪單元均具有一可 轉動地設4於職座上的㈣、多U環設㈣輪較周面 200944661 ' 上的扇葉，以及一環設於所述扇葉外端緣上的磁鐵環。該 驅動單元是設置於該二扇輪單元之一侧，並具有一控制該 二扇輪單元作動較子、—纏設於㈣子上的線圈，及一 汉置於該基座上且與該線圈形成電連接的電路板，該定子 是一體成型，並具有-概呈直立地設置於該基座上而供該 線圈纏設的柱狀本體，及上下間隔地設置於該柱狀本體上 而分別位於上、下容置空間中的一上磁極部及一下磁極部 ，該上磁極部是鄰近於位於該上容置空間中之扇輪單元的 ® 4鐵環，而該下磁極部是㈣於位於該下容置空間中之扇 輪單元的磁鐵環。 該電路板於通電後，可使該線圈被通電激磁，而令該 ^、下磁極部也會同時產生磁性，並使與該上、下磁極部 分別相對應之磁鐵環同時感受到磁性，進而產生一股磁性 推斥力帶動扇葉產生旋轉。 本發明之功效在於，一方面只使用單一個定子即可通 ^ 電激磁而驅使該二扇輪單元轉動，相較於習知技術必需利 用兩個义子才能產生作動，因此，本發明之定子的材料與 製成本能進一步降低；另一方面，由於本發明之定子 上所纏繞的線圈毋需如習知技術要分別纏繞於個別定子上 亦毋需連接跨越定子間之距離，因此，該線圈纏繞長度 較短’可以有效降低線圈的材料成本，亦能夠簡化整體電 路配置作業，以降低整體製造成本。 【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 7 200944661 以下配合參考圖式之一較佳實施例的詳細說明中，將可清 楚的呈現。 參閱圖3、4、5,本發明單定子串聯式外極風扇2的較 佳實施例，包+ -基& 21、二上下相間隔地設置於該基座 21上的扇輪單元22，及-位於該二扇輪單元22 一側的驅 動單元23。 該基座21包括上下相間隔的一上基座部211及一下基 座部212，該上、下基座部211、212是分別界定出該二上 〇 下相間隔且相互連通的上、下容置空間210、210，。 該一扇輪單元22是分別位於該上、下容置空間210、 210中，並分別設置於該上、下基座部211、212上，且均 具有一可轉動地設置於該基座21上的輪轂221、多數片環 設於該輪轂221周面上的扇葉222，以及一環設於所述扇葉 222外端緣上的磁鐵環223。 該驅動單元23具有一控制該二扇輪單元22作動的定 子231、一纏設於該定子231上的線圈232，及一設置於該 基座21之上基座部211上且與該線圈232形成電連接的電 路板233，該定子231是一體成型，並具有一概呈直立地設 置於該基座21上而供該線圈232纏設的柱狀本體235，及 上下間隔地β又置於s亥柱狀本體23 5上而分別位於上、下容 置空間210、210’中的一上磁極部234及一下磁極部234,， 該上磁極部234是鄰近於位在該上容置空間21〇中之扇輪 單元22的磁鐵環223，而該下磁極部234,是鄰近於位在該 下容置空間210’中之扇輪單元22的磁鐵環223。 200944661 該電路板233於通電後，可使該線圈232被通電激磁 ，再配合該線圈232是纏設於該定子231之柱狀本體2乃 上，而令該定子231之上、下磁極部234、234，會同時對每 一扇輪單元22之磁鐵環223產生一股磁性推斥力，並帶動 扇葉222產生旋轉’達到產生大量散熱氣流之目的。 當生產製造本發明單定子串聯式外極風扇2時，由於 所使用的定子231數量為單一個，且是設置於該二扇輪單 元22之一側，該定子231之該上磁極部234是具有二由該 〇 柱狀本體235概呈水平地朝位於該上容置空間21〇中的磁 鐵環223環面同向延伸的上極柱236，該下磁極部234，具有 二由該柱狀本體235概呈水平地朝位於該下容置空間21〇, 中的磁鐵環223環面同向延伸的下極柱236，，因此利用該 線圈232纏設於該柱狀本體235，通電激磁時就可令該等上 、下極柱236、236’皆產生磁性，即如圖3中所示之N、s 磁性作用。 反觀習知技術中，該第―、二定子⑷、142是各別獨 立而上下相間隔地設置於該二扇輪單元22 一側再互相連 接地纏設兩個感應線圈145、146，才能通電激磁而令各個 極柱143 144產生磁性，相較之下，本發明所使用的定子 231數量減少’材料與製造成本皆能進—步降低至於該定 子，上所纏繞的線圈232則毋需如習知技術要拉線跨越 兩定子間之距離’而僅需纏繞於定子231之柱狀本體奶 上’因此’該㈣232的纏繞長度較短，可以有效降低線 圈232的材料成本，更不需繁雜之配線及拉線作業，具有 9 200944661 • 簡化電源配線作業、降低製造成本等優點。 綜上所述，本發明單定子_聯式外極風扇2，一方面只 使用單一個定子231即可通電激磁而驅使該二扇輪單元22 轉動，因此，定子231的材料與製造成本皆能予以進一步 降低；另一方面，由於本發明之定子231上所纏繞的線圈 232毋需如習知技術要重覆纏繞且跨越二定子間的距離，因 此，該線圈232纏繞長度較短，可以有效降低線圈232的 材料成本，不僅能夠簡化整體電路配置作業，而更能降低 ® 製造成本，因此確實能達到本發明之目的。 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。 【圖式簡單說明】 圖1是一俯視圖，說明習知外極式風扇； 圖2是一側視剖視圖，辅助說明圖1所示之外極式風 屬， 圖3是一俯視圖，說明本發明單定子串聯式外極風扇 的較佳實施例； 圖4是一側視剖視圖，辅助說明圖3所示之較佳實施 例；及 、 圖5是一立體示意圖，說明該定子之態樣。 10 200944661 【主要元件符號說明】 2 單定子串聯式外 223 磁鐵環 極風扇 23 驅動單元 21 基座 231 定子 210 上容置空間 232 線圈 2105 下容置空間 233 電路板 211 上基座部 234 上磁極部 212 下基座部 234, 下磁極部 22 扇輪單元 235 柱狀本體 221 輪轂 236 上極柱 222 扇葉 236, 下極柱 ❹ 11200944661 IX. Description of the Invention: [Technical Field] The present invention relates to an external pole fan, and more particularly to a single stator series external pole fan. [Prior Art] Referring to Figures 1 and 2, the conventional pole fan 1 includes a housing u, a fan wheel unit that is vertically stacked in the housing 11 and is disposed on the housing U. The circuit board® 13, which can simultaneously control the two-wheel single A 12 start, and the stator unit 14 disposed on the housing n between the two-wheel unit 12 to drive the two-wheel unit 12 to rotate . Each of the wheel units 12 has a hub 121, a rotating shaft 122 with the hub 121, a plurality of blades 123 radially spaced from the circumference of the hub 121, and a ring disposed on each of the blades The magnet ring 124 on the outer edge of 123. The stator unit 14 has a first stator 141 located above and a second stator 142 located below, the first stator 141 integrally extending to form a two-pole column 143, and the second stator 143 is used by an induction coil 145. The poles 143 are continuously wound, and the second stator 142 is also integrally formed with a two-pole column 144, and the second poles 44 are continuously wound by another induction coil 46, and the two induction coils are 145 and 146 are all electrically connected to the circuit board 13. The poles 143, 144 of the first and second stators 141, 142 of the stator unit 14 are continuously wound by two induction coils 145, 146, respectively, and the poles of the first and second stators 141, 142 The pole faces of the columns 143, 144 200944661 are the magnet rings 124 respectively corresponding to the outer edges of the blades (2) of the two wheel unit i2, so that when the circuit board π is energized, the two induction coils 145, 146 Then, the poles 143 and W are magnetically excited, and then magnetically sensed with the magnet ring a# of the two-wheel unit 12 to drive the two-wheel unit 12 to rotate. ❹ ❹ However, the external pole fan 1 still needs further improvement. For example, the external pole fan 1 must have both the second stator (4) and 142 to be activated, and it is impossible to use only the single stator. Adding, therefore, 'the material and manufacturing cost of the stator must be increased together; in addition, it is necessary to separately wrap two interconnected inductors _i45, i46, and the distance between the five X-stators 141, 142 is required to be connected. Therefore, the overall length of the coil and the material cost will be increased, and the overall circuit configuration will be complicated. SUMMARY OF THE INVENTION Therefore, the purpose of the present invention is to provide a single-stator series external fan A with materials and manufacturing costs that can effectively reduce and simplify the overall circuit configuration. Therefore, the single stator series external pole fan of the present invention comprises a base, a fan wheel unit which is two-phasely stacked on the base, and a drive unit located on one side of the two wheel unit. "Hai base has an upper accommodating space that is spaced apart from each other and connected to each other. The fan unit is located in the upper and lower accommodating spaces and is spaced apart from each other on the pedestal. Each of the fan unit has a (four), multi-U ring rotatably disposed on the pedestal. Let the (four) wheel be the fan blade on the circumferential surface 200944661', and a ring of magnets disposed on the outer edge of the blade. The driving unit is disposed on one side of the two-wheel unit, and has a coil for controlling the two-wheel unit to actuate, and is wrapped on the (four) sub-substrate, and a Han is placed on the base and The coil forms an electrically connected circuit board, the stator is integrally formed, and has a columnar body that is disposed substantially on the base and is wrapped by the coil, and is disposed on the columnar body at intervals An upper magnetic pole portion and a lower magnetic pole portion respectively located in the upper and lower accommodating spaces, the upper magnetic pole portion being adjacent to the 4 iron ring of the fan wheel unit located in the upper accommodating space, and the lower magnetic pole portion is (4) a magnet ring of the fan wheel unit located in the lower accommodating space. After the circuit board is energized, the coil can be energized and energized, so that the magnetic poles of the lower and lower magnetic poles simultaneously generate magnetism, and the magnet rings corresponding to the upper and lower magnetic pole portions simultaneously sense magnetism, and further A magnetic repulsive force is generated to drive the blades to rotate. The effect of the present invention is that, on the one hand, only one single stator can be used to drive the two-wheel unit to rotate, and it is necessary to use two sons to generate motion compared with the prior art. Therefore, the stator of the present invention The material and the manufacturing instinct are further reduced; on the other hand, since the coils wound on the stator of the present invention need to be wound separately on the individual stators as in the prior art, it is also necessary to connect the distances between the stators. The shorter winding length can effectively reduce the material cost of the coil, and can also simplify the overall circuit configuration to reduce the overall manufacturing cost. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Referring to Figures 3, 4 and 5, a preferred embodiment of the single-stator series external pole fan 2 of the present invention comprises a base-base & 21, two fan-wheel units 22 disposed on the base 21 at intervals. And a drive unit 23 located on one side of the two-wheel unit 22. The base 21 includes an upper base portion 211 and a lower base portion 212 spaced apart from each other. The upper and lower base portions 211 and 212 define upper and lower sides of the upper and lower jaws respectively spaced apart from each other. The accommodation space 210, 210,. The fan unit 22 is disposed in the upper and lower accommodating spaces 210 and 210, and is respectively disposed on the upper and lower base portions 211 and 212, and has a rotatably disposed on the base 21 The upper hub 221, the plurality of segments are disposed on the circumferential surface of the hub 221, and a ring 222 is disposed on the outer edge of the blade 222. The driving unit 23 has a stator 231 for controlling the two wheel unit 22 to be actuated, a coil 232 wound around the stator 231, and a base portion 211 disposed on the base 21 and coupled to the coil 232. Forming an electrically connected circuit board 233, the stator 231 is integrally formed, and has a columnar body 235 disposed on the base 21 and entangled by the coil 232, and the upper and lower intervals β are placed on the s An upper magnetic pole portion 234 and a lower magnetic pole portion 234 are respectively located in the upper and lower accommodating spaces 210, 210', and the upper magnetic pole portion 234 is adjacent to the upper accommodating space 21 The magnet ring 223 of the fan wheel unit 22 in the middle, and the lower magnetic pole portion 234 is a magnet ring 223 adjacent to the fan wheel unit 22 located in the lower accommodating space 210'. When the circuit board 233 is energized, the coil 232 can be energized and energized, and the coil 232 is wound around the columnar body 2 of the stator 231, so that the upper and lower magnetic pole portions 234 of the stator 231 are 234. 234, a magnetic repulsive force is generated for each of the magnet rings 223 of each of the wheel units 22, and the fan blades 222 are rotated to generate a large amount of heat dissipation airflow. When the single stator series external pole fan 2 of the present invention is manufactured, since the number of the stators 231 used is a single one and is disposed on one side of the two wheel unit 22, the upper magnetic pole portion 234 of the stator 231 is The upper pole 236 extends from the cylindrical ring body 235 substantially horizontally toward the annular surface of the magnet ring 223 located in the upper accommodating space 21 ,, and the lower magnetic pole portion 234 has two columns The main body 235 is horizontally disposed toward the lower pole 236 extending in the same direction in the ring surface of the magnet ring 223 located in the lower accommodating space 21, and is thus entangled in the columnar body 235 by the coil 232. The upper and lower poles 236, 236' can be made magnetic, that is, the magnetic action of N, s as shown in FIG. In contrast, in the prior art, the first and second stators (4) and 142 are independently disposed on the side of the two-wheel unit 22 at intervals of the upper and lower sides, and then two induction coils 145 and 146 are connected to each other to be energized. The magnetization causes the poles 143 144 to generate magnetism. In comparison, the number of stators 231 used in the present invention is reduced. 'Materials and manufacturing costs can be reduced stepwise to the stator, and the coil 232 wound thereon is not required. The prior art has to pull the wire across the distance between the two stators and only needs to be wound on the columnar body milk of the stator 231. Therefore, the winding length of the (four) 232 is short, which can effectively reduce the material cost of the coil 232, and does not need to be complicated. Wiring and cable drawing, 9 200944661 • Simplify power wiring and reduce manufacturing costs. In summary, the single stator-coupled outer pole fan 2 of the present invention can be energized by using only one stator 231 to drive the two wheel unit 22 to rotate. Therefore, the material and manufacturing cost of the stator 231 can be Further, since the coil 232 wound on the stator 231 of the present invention needs to be repeatedly wound and spanned between the two stators as in the prior art, the coil 232 has a short winding length and can be effectively used. Reducing the material cost of the coil 232 not only simplifies the overall circuit configuration, but also reduces the manufacturing cost, and thus indeed achieves the object of the present invention. The above is only the preferred embodiment of the present invention, and the scope of the 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 remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a conventional outer-pole fan; FIG. 2 is a side cross-sectional view for assistance in explaining the outer pole type wind shown in FIG. 1, and FIG. 3 is a plan view showing the present invention. FIG. 4 is a side elevational cross-sectional view of the preferred embodiment of FIG. 3; and FIG. 5 is a perspective view showing the aspect of the stator. 10 200944661 [Main component symbol description] 2 Single stator series outer 223 magnet ring fan 23 Drive unit 21 Base 231 Stator 210 upper accommodation space 232 Coil 2105 Lower accommodation space 233 Circuit board 211 Upper base portion 234 Upper magnetic pole Part 212 lower base portion 234, lower magnetic pole portion 22 fan wheel unit 235 cylindrical body 221 hub 236 upper pole 222 blade 236, lower pole ❹ 11