201000769 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種散熱風扇，特別是指-種單定子 外極式散熱風扇。 【先前技術】 产參閱圖1 ’一般單定子外極式散熱風扇1係藉由將外部 空氣導入，並與-發熱元件進行熱交換，達到降溫之目的 ’該散熱風扇1包含有—底座11、-設於該底座u上之轉 子 及°又於該底座11上的磁極13’其中’該底座n 具有-固定軸⑴，而該轉子12具有一設於該固定軸1U 上的輪轂121、多數片設於該輪轂121外緣之扇葉及 一環設於所述扇葉122外周緣的磁鐵環123，藉由將該磁極 =通電激磁後’與該磁„ 123產生磁斥力而驅動該磁鐵 環123轉動，進而連動該扇葉122旋轉。 不k由於3亥單疋子外極式散熱風扇1僅具有單一磁 極13，且該磁極13係設置在該錢11之-側，當驅動該 轉子2轉動時’邊磁極13單—方向所產生的磁斥力將無 M 41¾¾ 123四周均衡驅動施力’導致該磁鐵環m 又力方向不均而在轉動時會有發生偏擺的疑慮。 再者，該散熱風扇i於運轉時，所述扇葉 122將外部 空氣導入，進而吝斗 、^ 阳產生—股向上的氣體浮力，由於所導入氣 抓的爻化大，相對使所述扇帛122受到影響，而較容易產 生晃動而降低該散熱風扇1運轉的穩定度。 【發明内容】 5 201000769 因此，本發明之目的，即在提供一種提高風扇運轉穩 定性的單定子外極式散熱風扇。 於是’本發明之單定子外極式散熱風扇，包含一定子 單元，及一扇輪。 該定子單元包括一底座、一設於該底座上的支撐座、 —設於該底座上且位於該支撐座外圍的第一磁環、一設置 在该底座上的磁極、一電連接該磁極並設置在該底座上的 了路板及一電連接該電路板的感應元件，其中，該第— 磁環具有一第一磁力中心平面。 知該扇輪具有一可轉動地設於該定子單元之支撐座上的 輪杈、多數片自該輪轂向外輻射延伸的扇葉、一環設於所 =葉外端緣的磁鐵環’及—套設在該輪穀外周緣且位於 2底部並與該定子單元之第—磁環互相磁性感應的第二 衣，该定子單元的磁極則是位於該磁鐵環外側，且該 一磁環具有一第二磁 " 力φ、τ 十甶而3亥第—磁環的第一磁 中心平面低於該第二磁力中心平面。 本發明之功效在於，藉由該第一 平 棺田以弟磁J衣的第一磁力中心 該第二磁環的第二磁力中 時，兩者之P弓从戎* 田風扇在運轉 ㈣效;* 使該第：磁環受到該第—磁鐵環的 屬輪轉動m θ ㈣用力’相對減少該 動的穩定度。 乂 有效提升風扇轉 【實施方式】 、特點與功效，在 有關本發明之前述及其他技術内容 6 201000769 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 明中，類似的元件是以相同的編號來表示。 參閱圖2、3，本發明單定子外極式散熱風扇2之第一 較佳實施例，包含一定子單元3 ,及一扇輪5。 該定子單元3包括一底座31、一與該底座31相組合的 頂座30、一設於該底座31上的支撐座32、一設於該底座 31上且位於該支撐座32外圍的第一磁環33、一設置在該 底座31上的磁極34、一電連接該磁極34並設置在該底座 31上的電路板35 ’及一電連接該電路板％的感應元件％ 其中，邊支撐座32具有一自該底座31向上延伸的固定 1及一套置在該固定軸321上的軸承322，且該第一 磁ί衣33具有一第一磁力中心平面 S亥扇輪5具有一可轉動地設於該定子單元3之支撐座 $輪較51、多數片自該輪毅51向外輕射延伸的扇葉 衣D又於所述扇葉52外端緣的磁鐵環53，及一套設 之^㈣51外周緣且位於㈣52底部並與狀子單元3 、磁％ 33互相磁性感應的第二磁環54,而該磁極34 :式^磁鐵環53外側，該磁鐵環53可利用膠合或其他 式衣套於所述扇葉52之外端緣上。 。亥第二磁環54係位在所 之第一磁γ ” k ^某52下方與該定子單元3 該第―：:上方之間’且具有-第二磁力中心平“， 展33的第一磁力中心平面这低於該第二磁力中心 7 201000769 平面b。 在此要說明的是，由於該定子單 』千兀_3之弟一磁環33 該扇輪5 1之第二磁環5 4 # A诚姓从丨 、 斗係為磁性材料，因而分別且 一、二磁力中心平面a、b，兮筮一 _ 、巧罘 〜 、一磁力中心平面a、b 之間的磁力感應會隨著相對位罟拎徵 可和釘位置改紇而對該扇輪51 同的作用力。 + 換S之，如果该第一磁力中心平面a是低於該第二磁力 中心平面b ’該第—磁環33的則力就可以將該第二磁if 54向下吸附而使該扇輪5受一向下的作用力；相反地，J 果第-磁力中心平面a是高於第二磁力中心平面b，則可以 將該第二磁環54向上吸附而使該扇輪5受―向上的作用力 ’如果第一、二磁力中心平面a、b平行，就不會有 沉的現象產生。 依據上述架構’當該定子單元3之電路板35通電導通 時’該感應元件36得、藉由感應該轉子單元5之磁鐵環μ 的磁性變化，經由該電路板35控制該磁極34通電激磁而 與該磁鐵環53產生磁性相斥，進而驅使該磁鐵環53轉動 ，並連動該輪轂5以該支樓座32之固定軸321為中心而帶 動所述扇葉52旋轉。 上*再者，由於該第一磁環33之第一磁力中心平面a低於 口亥第一磁ί衣54之第二磁力中心平面b，該第二磁環Μ受到 向下的磁力吸附，因此，該扇輪5轉動時亦會受到一向下 的作用力，而與向上的氣體浮力相抵銷，而且，利用該第 磁％ 33與第二磁環54皆為環狀的結構且互相磁性感應 201000769 進而改善該 ，相對使该扇輪5四周所受的作用力較平均 扇輪5轉動時之偏擺、晃動及上浮的現象。 故本發明單定子外極式散熱風扇2在設計上，藉由設 於該底座31上的第—磁環33與設於該扇輪$下緣的第二 磁％ 54 ’兩者互相產生磁吸效應，而對該扇輪$產生—股 向下的作用力’進而減少該扇輪5轉動時之偏擺、晃動及 上洋的情形，有效提升風扇轉動的穩定度。 參閱圖4、5,本發明單定子外極式散熱風扇2之第二 :佳！施例，大致上是與該第一較佳實施例相同，皆包含 之子單元3 ’及一扇輪5。 不相同之處在於，該扇輪5之每一扇葉52下緣形成有 一與該定子單元3之底座31相對的容置部55，該第二磁環 54固认於所述谷置部55中，且該第—磁環η是穿伸於所 述容置部55中且圍繞於該第二磁環54的外側。201000769 IX. Description of the Invention: [Technical Field] The present invention relates to a heat dissipating fan, and more particularly to a single stator external pole type cooling fan. [Prior Art] Refer to Figure 1 'General single-stator external-pole cooling fan 1 is designed to reduce the temperature by introducing external air and exchanging heat with the heating element. The cooling fan 1 includes a base 11, a rotor provided on the base u and a magnetic pole 13' on the base 11 wherein the base n has a fixed shaft (1), and the rotor 12 has a hub 121 disposed on the fixed shaft 1U, and a majority a blade disposed on an outer edge of the hub 121 and a ring of magnets 123 disposed on an outer periphery of the blade 122 are driven to generate a magnetic repulsive force by the magnetic pole = energized and excited to generate a magnetic repulsive force. 123 rotates, and then the fan blade 122 rotates. Not because the outer fan type heat dissipation fan 1 has only a single magnetic pole 13, and the magnetic pole 13 is disposed on the side of the money 11, when the rotor 2 is driven When rotating, the magnetic repulsive force generated by the single-pole direction of the magnetic pole 13 will not be balanced by the M 413⁄43⁄4 123. The magnet ring m will be unevenly oriented and there will be a yaw when turning. When the cooling fan i is in operation, the blade 122 will The external air is introduced, and the buoyancy of the gas generated by the bucket and the yoke is increased due to the large amount of enthalpy of the introduced gas, so that the fan sill 122 is relatively affected, and the sloshing is relatively easy to reduce the operation of the cooling fan 1 [Summary of the Invention] 5 201000769 Therefore, an object of the present invention is to provide a single-stator external-pole cooling fan that improves the stability of operation of the fan. Thus, the single stator external-pole cooling fan of the present invention includes a certain a sub-unit, and a wheel. The stator unit includes a base, a support base disposed on the base, a first magnetic ring disposed on the base and located at a periphery of the support base, and a first magnetic ring disposed on the base a magnetic pole, a circuit board electrically connected to the magnetic pole and disposed on the base, and an inductive component electrically connected to the circuit board, wherein the first magnetic ring has a first magnetic center plane. a rim rotatively disposed on the support base of the stator unit, a plurality of blades radiating outward from the hub, a ring of magnets disposed at an outer edge of the blade, and a sleeve a second garment having a periphery of the valley and located at the bottom of the 2 and magnetically inducing with the first magnetic ring of the stator unit, the magnetic pole of the stator unit is located outside the magnet ring, and the magnetic ring has a second magnetic property. The first magnetic center plane of the magnetic force φ, τ 甶 甶 3 3 3 磁 磁 磁 磁 磁 磁 磁 磁 磁 。 。 。 。 。 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一When the second magnetic force of the second magnetic ring is in the middle, the P-bend of the two is in operation (four); * the magnetic ring is subjected to the rotation of the trajectory of the first magnet ring m θ (four) force is relatively reduced The stability of the movement. 乂 Effectively improving the fan rotation [embodiment], features and effects, in the detailed description of the two preferred embodiments of the present invention with reference to the above and other technical contents 6 201000769 of the present invention Can be clearly presented. Before the present invention is described in detail, it is noted that in the following description, like elements are denoted by the same reference numerals. Referring to Figures 2 and 3, a first preferred embodiment of the single stator external pole cooling fan 2 of the present invention comprises a certain subunit 3 and a fan wheel 5. The stator unit 3 includes a base 31, a top seat 30 combined with the base 31, a support base 32 disposed on the base 31, and a first base disposed on the base 31 and located at the periphery of the support base 32. a magnetic ring 33, a magnetic pole 34 disposed on the base 31, a circuit board 35' electrically connected to the magnetic pole 34 and disposed on the base 31, and an inductive component 100 electrically connected to the circuit board. 32 has a fixed 1 extending upward from the base 31 and a set of bearings 322 disposed on the fixed shaft 321 , and the first magnetic yoke 33 has a first magnetic center plane S. The fan wheel 5 has a rotatable a fan ring D disposed on the support base of the stator unit 3, a plurality of blades extending from the wheel 51, and a magnet ring 53 on the outer edge of the blade 52, and a set The second magnetic ring 54 is disposed on the outer periphery of the (four) 51 and located at the bottom of the (four) 52 and magnetically induced with the sub-unit 3 and the magnetic element 33, and the magnetic pole 34 is outside the magnet ring 53. The magnet ring 53 can be glued or otherwise. The sleeve is sleeved on the outer edge of the blade 52. . The second magnetic ring 54 is located between the first magnetic γ ” k ^ 52 and the upper ～:: of the stator unit 3 and has a second magnetic center flat, the first of the 33 The magnetic center plane is lower than the second magnetic center 7 201000769 plane b. It should be noted that, due to the stator single, the third magnetic ring 33, the second magnetic ring of the fan wheel 5 1 is a magnetic material, and thus The first and second magnetic center planes a, b, 兮筮一_, Qiao 罘~, the magnetic induction between the magnetic center planes a and b will change with the relative position and the nail position. 51 The same force. + For S, if the first magnetic center plane a is lower than the second magnetic center plane b' the first magnetic ring 33, the second magnetic if 54 can be adsorbed downward to make the fan wheel 5 is subjected to a downward force; conversely, if the first magnetic center plane a is higher than the second magnetic center plane b, the second magnetic ring 54 can be adsorbed upward to make the fan wheel 5 to be "upward" Force 'If the planes a and b of the first and second magnetic centers are parallel, there will be no sinking. According to the above structure, when the circuit board 35 of the stator unit 3 is electrically turned on, the sensing element 36 controls the magnetic pole 34 to be energized by the circuit board 35 by sensing the magnetic change of the magnet ring μ of the rotor unit 5. The magnet ring 53 is magnetically repelled, and the magnet ring 53 is driven to rotate, and the hub 5 is driven to rotate the blade 52 around the fixed shaft 321 of the branch base 32. Further, since the first magnetic center plane a of the first magnetic ring 33 is lower than the second magnetic center plane b of the first magnetic shield 54, the second magnetic ring is subjected to a downward magnetic attraction. Therefore, the fan wheel 5 is also subjected to a downward force when it rotates, and offsets the upward gas buoyancy, and the first magnetic flux 33 and the second magnetic ring 54 are both annular and magnetic. The induction 201000769 further improves the phenomenon of yaw, sway and float when the force applied to the periphery of the fan wheel 5 is relatively smaller than that of the average fan wheel 5. Therefore, the single-stator external-pole cooling fan 2 of the present invention is designed to generate magnetic waves by the first magnetic ring 33 disposed on the base 31 and the second magnetic flux 54' disposed on the lower edge of the fan wheel The suction effect, and the downward force of the fan wheel is generated to further reduce the yaw, sway and the ocean when the fan wheel 5 rotates, thereby effectively improving the stability of the fan rotation. Referring to Figures 4 and 5, the second stator external pole type cooling fan 2 of the present invention is second: good! The embodiment is substantially the same as the first preferred embodiment, and includes a subunit 3' and a fan wheel 5. The difference is that the lower edge of each of the blades 52 of the fan wheel 5 is formed with a receiving portion 55 opposite to the base 31 of the stator unit 3, and the second magnetic ring 54 is fixed to the valley portion 55. The first magnetic ring η extends through the receiving portion 55 and surrounds the outer side of the second magnetic ring 54.
該第二較佳實施例不僅可達到與該第一較佳實施例相 =的功J：，而且，藉由該容置部55的設計使該第—磁環Μ 穿伸於其中，而能降低整體單定子外極式散熱風扇2的高 度’用以提供使用者另一種實施態樣。 ▲ %、内上述’本發明之單定子外極式散熱風扇2，利用設 ^底座31上的第_磁環33與設於該扇輪$下緣的第二 、广—54㊉者互相產生磁性感應，進而使該扇輪$運轉時 、、/第一磁％ 54文到該第一磁鐵環33的磁吸效應，進而 斗。亥扇輪5轉動時之偏擺、晃動及上浮的情形，有效提 升風扇轉動的穩定度，故確實能達到本發明之目的。 9 201000769 ▲惟以上所述者，僅為本發明之較佳實施例而已，當不 ，以此限定本發明實施之範圍，即大凡依本發明中請專利 乾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疋—剖視圖，說明一般單定子外極式散熱風扇之 態樣； 圖2是一立體分解圖，說明本發明單定子外極式散熱 風扇之第一較佳實施例； 圖3是—剖視圖，說明該第一較佳實施例之態樣； 圖4是一立體分解圖，說明本發明單定子外極式散熱 風扇之第二較佳實施例；及 圖5是一剖視圖，說明該第二較佳實施例之態樣。 10 201000769 【主要元件符號說明】 2單定子外極式散熱風 36··· ......感應兀件 扇 5…· ......扇輪 3 ········ -定子單元 51 ··· 輪車又 3 0…… ••頂座 52… ......扇葉 1 * * 8 ^ s ^ 8 ••底座 53 ··· ……磁鐵環 32…·… …支撐座 54..， ......第二磁環 321。** ••固定軸 55 ··· ......容置部 322…… …轴承 a第 一磁力中心平面 2 2 ••第一磁環 b第 二磁力中心平面 34....... ••磁極 3 5··..... ••電路板 11The second preferred embodiment can not only achieve the work J of the first preferred embodiment, but also allows the first magnetic ring 穿 to penetrate through the design of the receiving portion 55. Reducing the height of the overall single stator external pole cooling fan 2 is used to provide another embodiment of the user. ▲ %, the above-mentioned single-stator external-pole heat-dissipating fan 2 of the present invention is magnetically generated by using the first magnetic ring 33 on the base 31 and the second, wide-54, which are disposed on the lower edge of the fan wheel Induction, and further, when the fan wheel $ is running, the first magnetic flux is applied to the magnetic ring effect of the first magnet ring 33, and then the bucket is further engaged. When the hoisting, swaying and floating of the hoisting wheel 5 is rotated, the stability of the fan rotation is effectively improved, so that the object of the present invention can be achieved. 9 201000769 ▲ However, 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 simpleness of the patent and the description of the invention in the present invention. Equivalent variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a general single stator external pole type cooling fan; FIG. 2 is an exploded perspective view showing a first preferred embodiment of the single stator external pole type cooling fan of the present invention; Figure 3 is a cross-sectional view showing the first preferred embodiment; Figure 4 is an exploded perspective view showing a second preferred embodiment of the single-stator external-pole cooling fan of the present invention; and Figure 5 is a The cross-sectional view illustrates the aspect of the second preferred embodiment. 10 201000769 [Explanation of main component symbols] 2 Single stator external pole cooling air 36··· ...... Induction element fan 5...·...fan wheel 3 ········ - Stator unit 51 ··· Wheelbarrow 3 0... ••Top seat 52... ......Flap 1 * * 8 ^ s ^ 8 •• Base 53 ··· ...... Magnet ring 32...· ... support 54.., ... second magnetic ring 321 . **••Fixed shaft 55 ··· 容 322 ............ bearing a first magnetic center plane 2 2 ••first magnetic ring b second magnetic center plane 34..... .. ••Magnetic pole 3 5··..... ••Board 11