1324222 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種扇輪裝置，特別是指一種外極式 風扇之扇輪裝置。 【先前技術】 一般習知小型散熱風扇，主要是藉由將一磁鐵環固設 於一風扇輪轂内，且使該磁鐵環間隔環設於一可被通電激 磁之定子外側，藉由使該定子與該磁鐵環間產生同極排斥 力，而推動該磁鐵環相對該定子轉動，並連動該風扇輪轂 及連結於輪轂上的葉片相對於定子而被驅動旋轉，此即為 一般常見的内極式風扇。而為達到較佳的出風效率，此種 内極式風扇必須依賴增加磁鐵環、定子的有效通磁體積以 提高兩者間的斥力，但相對地，整個内極式風扇所佔體積 便擴大’不利於裝設於體積較小的電子製品中。 因此，如圖1所示，目前一般業界之外極式風扇i即 是使該磁鐵環11環設並連結於每一風扇扇葉12的外側緣， 再將至少一個（於圖1中顯示有二個）纏繞有感應線圈131的 磁極座132相間隔地環設於該磁鐵環u之外側，而藉以改 善習知的内極式散熱風扇體積較大之缺點。 如圖2所示，為另一種習知外極式風扇之扇輪裝置， 該扇輪裝置包含一扇輪21、一環形固定框22及一磁鐵環 23。該扇輪21具有一可框接於該外極式風扇之殼座（圖未示 )上的輪轂211，以及多數片設置於該輪轂211周緣之扇葉 212。該環形固定框22是框固於該等扇葉212之外端緣， 5 明4222 而該磁鐵環23可藉由接著 繞於該固定框22的外圍：=:或緊配合方式而固定環 鐵環m見圖”直接連善如圖1所示中之磁 緣m 接4、〜於每—風扇扇葉12(見圖υ的外側 W 之結合力可能不足的問題。並且如圖3所示， 亦可於下緣形成有一凸垣221，而使該磁鐵環 藉以抵罪並加強該固定框22與該磁鐵環23間的結合力 〇 然而，隨著現階段科技產業所採用之處理器等電子元 件的運作頻率日益提高，電子元件運作時所產生之熱量亦 愈，愈高’ SUb ’連帶使得風扇内部所承受的溫度亦隨之 增同並由於上述之外極式風扇的磁鐵環23是設置於該等 扇葉212 t外端緣，而並非如習知内極式風扇是裝設於該 風扇輪較的内部，因此’該磁鐵環23不再受到輪較的保護 阻隔，而經常會在高溫的情況下直接接觸到外界的冷空氣 ，在長期運作下，將會一再的造成急遽的熱脹冷縮效應， 而使得該磁鐵環23易於產生龜裂、破損及產生連帶的漏磁 現象，導致風扇之轉速降低無法正常運作，而必需重新更 換風扇的情況發生，進而使得該外極式風扇之整體使用壽 命減低。再者，由於該磁鐵環23之外側並無任何的保護隔 絕物體，因此’ 一旦該磁鐵環23上形成有破損時，更易於 該風扇咼速運轉下產生碎裂，並使裂片往外高速飛散而致 使周邊相關元件損壞的危險情況。 综上所述，習知的外極式風扇由於磁鐵環23易於發生 急遽熱脹冷縮而產生龜裂、破損的情況，因而使得該外極 6 1324222 式風扇的整體制壽命及運作時的安全性均大為降低，因 此’上述問題’乃是相關業界亟待更進一步改進的目標。 【發明内容】 因此’本發明之目的，即在提供一種結構上更為穩定 1整體使用壽命更長，且更具安全性的外極式風扇之扇輪 —於是，本發明外極式風扇之扇輪裝置是適用於裝設在 —外極式風扇之風扇基座内’㈣扇基座包括—基殼體、 至』一设置於該基殼體上之磁極柱單元。 *該扇輪裝置包含-輪轂、複數扇葉、一連接於每一扇 f之外端緣而環設於該等扇葉的中空環框、一磁鐵環及 -阻磁板’該輪轂是㈣於該風扇基座的基殼體上，該等 扇葉是相間隔連接於該輪較的外周緣，該中空環框且有一 Z狀頂壁、二分別由該頂壁同向延伸而彼此相間隔：内、 卜％繞壁，且該内環繞壁是連接於該等扇葉的外端緣，並 由該頂壁、該内環繞壁及該外環繞壁共同界定出一環狀的 谷置槽，該磁鐵環是設置於該中空環框之容置槽内，且該 磁極柱單元是與該磁鐵環之外周緣相間隔地設置，該阻磁 板是設置於該環框之容置槽内，並位於該内環繞壁與該磁 鐵環之間。 本發明之功效在於，藉由將該磁鐵環裝設於該中空環 框之容置槽内而被該内、外環繞壁予以包覆，因此能夠避 免該磁鐵環在高溫下直接遭受外界冷空氣之接觸，而能有 效地防止該磁鐵環因-再的急遽熱脹冷縮而產生龜裂或破 7 1324222 損，以延長整體之使料命’同時，即使在該磁鐵環破損 的情況下，亦能確保其在高速運轉時不會向外飛散碎裂， 更能提升整體使用上的安全性。【實施方式】 有關本發明t前述及其他技術内纟、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。1324222 IX. Description of the Invention: [Technical Field] The present invention relates to a fan wheel device, and more particularly to a fan wheel device of an external pole fan. [Prior Art] A conventional small-sized heat-dissipating fan is mainly provided by fixing a magnet ring in a fan hub, and the magnet ring spacer ring is disposed outside a stator that can be energized and excited, by making the stator Generating the same pole repulsive force with the magnet ring, and pushing the magnet ring to rotate relative to the stator, and driving the fan hub and the blade attached to the hub to be driven to rotate relative to the stator, which is a common common inner pole type fan. In order to achieve better air efficiency, the inner pole fan must rely on increasing the effective magnetic flux of the magnet ring and the stator to increase the repulsive force between the two, but the volume of the entire inner pole fan is enlarged. 'It is not conducive to installation in small electronic products. Therefore, as shown in FIG. 1 , the current general-purpose fan i is such that the magnet ring 11 is looped and connected to the outer edge of each fan blade 12, and at least one (shown in FIG. 1 is shown). The two pole seats 132 wound with the induction coils 131 are circumferentially spaced apart from the outer side of the magnet ring u, thereby improving the disadvantages of the conventional inner-pole type heat-dissipating fan. As shown in FIG. 2, it is a fan wheel device of another conventional external fan. The fan wheel device includes a fan wheel 21, an annular fixing frame 22 and a magnet ring 23. The fan wheel 21 has a hub 211 that can be framed on a housing (not shown) of the outer pole fan, and a plurality of blades 212 disposed on a periphery of the hub 211. The annular fixing frame 22 is fixed to the outer edge of the fan blades 212, and the magnet ring 23 can be fixed around the periphery of the fixing frame 22 by the following: =: or tightly fitting the ring iron. The ring m is shown in the figure "Directly good as shown in Figure 1. The magnetic edge m is connected to 4, and the adhesion force of each fan blade 12 (see the outer side W of Figure 可能) may be insufficient. A protrusion 221 may be formed on the lower edge, so that the magnet ring can be used to sin and strengthen the bonding force between the fixing frame 22 and the magnet ring 23. However, with the processor and the like used in the current technology industry, The frequency of operation of the components is increasing, and the heat generated by the operation of the electronic components is higher. The higher the 'SUb' is, the more the temperature inside the fan is increased, and the magnet ring 23 of the pole fan is set up. At the outer edge of the blade 212 t, and not as the conventional inner fan is installed inside the fan wheel, the magnet ring 23 is no longer protected by the wheel, and often at a high temperature. In case of direct contact with the outside cold air, in the long run Under the circumstance, the rapid expansion and contraction effect will be caused repeatedly, and the magnet ring 23 is prone to cracking, breakage and associated magnetic leakage, which causes the fan speed to be reduced and cannot be operated normally, and the fan must be replaced again. The situation occurs, which in turn reduces the overall service life of the outer pole fan. Further, since the outer side of the magnet ring 23 does not have any protection against the object, it is easier to make the magnet ring 23 damaged. The fan generates a chipping under the idling operation, and causes the lobes to fly outward at a high speed to cause damage to the surrounding related components. In summary, the conventional outer-pole fan is prone to rapid thermal expansion and contraction due to the magnet ring 23. The occurrence of cracks and breakages has greatly reduced the overall life and safety of the external pole 6 1324222 fan. Therefore, the above-mentioned problem is a goal that needs further improvement in the related industry. Therefore, the purpose of the present invention is to provide a structurally more stable one. The overall service life is longer and safer. The fan wheel of the outer pole fan - thus, the fan wheel device of the outer pole fan of the present invention is suitable for being installed in the fan base of the outer pole fan' (four) fan base including - base housing, to a magnetic pole unit disposed on the base housing. The fan wheel device includes a hub, a plurality of blades, and a hollow ring frame connected to the outer edge of each fan and ringed on the blades. a magnet ring and a magnetically resistive plate 'the hub is (4) on the base casing of the fan base, the blades are spaced apart from the outer periphery of the wheel, the hollow ring frame has a Z-shaped top wall And the two top walls respectively extend in the same direction and are spaced apart from each other: the inner and the outer walls are connected to the outer edge of the fan blades, and the inner wall and the inner surrounding wall are The outer surrounding wall defines an annular groove, the magnet ring is disposed in the receiving groove of the hollow ring frame, and the pole unit is disposed at a distance from the outer periphery of the magnet ring. The magnetically resistive plate is disposed in the receiving groove of the ring frame and located between the inner surrounding wall and the magnet ring. The utility model has the advantages that the magnet ring is covered by the inner and outer surrounding walls by being installed in the receiving groove of the hollow ring frame, so that the magnet ring can be directly protected from the outside cold air at a high temperature. The contact can effectively prevent the magnet ring from being cracked or broken due to rapid thermal expansion and contraction, thereby prolonging the overall life of the magnet ring, and even if the magnet ring is broken, It also ensures that it will not scatter and shatter at high speeds, and it will improve the safety of the overall use. [Embodiment] The foregoing and other technical features, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.
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4、 5，為本發明外極式風扇之扇輪裝置3的第一較佳實施例， 是適用於裝設在一外極式風扇之風扇基座4上該風扇基 座4包括-平板狀之基殼體41、一與該基殼體41相配合而 可蓋設於該基殼體41上的殼蓋42，及四個設置於該基殼體 41上的磁極柱單元44。其中，該基殼體4〗具有一基板411 ，及-設於該基板411中央之轴桿412。該等磁極柱單元44Before 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 Figures 4 and 5, a first preferred embodiment of the fan-wheel device 3 for an external-pole fan of the present invention is suitable for mounting on a fan base 4 of an external-pole fan. The flat base member 41, a cover 42 that is coupled to the base housing 41 and covers the base housing 41, and four magnetic pole units 44 disposed on the base housing 41. The base case 4 has a substrate 411 and a shaft 412 disposed at the center of the substrate 411. The pole unit 44
疋鄰近該基殼體41之周緣，而彼此相間隔且呈環狀排列地 設置於該基殼體41上。值得—提的是，於該第—較佳實施 例中H人風/出風方式為軸流式之風扇基座4為例。 每一磁極柱單元44包括有一磁極座 441 ’及一纏繞於 該磁極座441上而可被通電激磁的感應線圈442。 該扇輪裝置3是抱設於該外極式風扇之風扇基座*上 ’且包含-輪轂31、複數相間隔地連接於該輪穀31之外周 緣的扇葉32、-連接於每—扇葉32之外端緣而環設於該等 扇葉32的中空環框33、-設置於該環框33内的磁鐵環34 δ 1324222 ，及-設餘該環框33内並位於該環框33與該磁鐵環料 間的阻磁板35。The crucibles are disposed adjacent to the periphery of the base casing 41, and are spaced apart from each other and arranged in a ring shape on the base casing 41. It is worth mentioning that in the first preferred embodiment, the H-wind/air outlet mode is an axial-flow fan base 4 as an example. Each of the pole unit 44 includes a pole holder 441' and an induction coil 442 wound around the pole holder 441 to be energized. The fan wheel device 3 is mounted on the fan base* of the external pole fan and includes a hub 31, a plurality of blades 32 connected to the outer periphery of the wheel valley 31 at intervals, and is connected to each a hollow ring frame 33 disposed on the outer edge of the fan blade 32 and disposed in the fan blade 32, a magnet ring 34 δ 1324222 disposed in the ring frame 33, and a ring disposed in the ring frame 33 and located in the ring A magnetically resistive plate 35 is formed between the frame 33 and the magnet ring.
其中’該輪轂31是可轉動地套設於該軸桿412而樞設 於該風扇基座4的基殼體41上。該中空環框33是呈一圓 環狀’並是位於該等磁姉單元44所組成之環狀排列的内 側，而受該等磁極柱單元44之圍繞，該環框Μ具有一環 狀頂壁331 分別由該頂壁331同向延伸而彼此相間隔的 内、外環繞壁332、333，且該内環繞壁332是連接於該等 扇葉32的外端緣，並由該頂壁331、該内環繞壁332及該 外環繞壁333共同界定出一圓環狀的容置槽33〇。於該第一 較佳實施财，該環框33可為—，而直接與該等 扇葉32 —體成型，亦或是以接著劑膠合或緊配合等方式， 使該％框33與該等扇葉32之外端緣緊密接合固定而可 以更精確地掌控該等扇葉32與該環框33之成型尺寸要求 並可減少額外之固定程序，確保更完善之牢固性。 该磁鐵環34是形狀相符地設皇於該環框33之容置槽 330内，而一面貼靠於該環框33之外環繞壁333的内侧， 而另—面則是貼靠於該阻磁板35上❶其中，該阻磁板％ 疋概呈一倒L形，且為一金屬材質製成，而可將該環框33 之頂壁331與該磁鐵環34之頂面隔絕，以及可將該環框 之内裱繞壁332與該磁鐵環34的一側面隔絕，藉此，而具 有較佳聚磁及防磁損等效能，以將該磁鐵環34之磁力往該 衣忙33之外環繞壁333方向集中作用。而於該第一較佳實 鼽例中，該磁鐵環34，是由一般膠磁或稀土磁以燒結法製 9 成’再將該磁鐵環34置入該環框33之容置槽330内，該 磁鐵環34可藉由直接緊配於該環框33内，或是以接著劑 相黏著方式固定。 而當該外極式風扇運轉時’是藉由一裝設於該基殼體 41上的感應器43，感應相對應於該等磁極柱單元44位置 上之該磁鐵環34的磁性，並同時控制該等磁極柱單元44 之感應線圈442使其通電，產生與該磁鐵環34相同之磁性 ’而使該磁鐵環34與該等磁極柱單元44間產生磁性互斥 力而開始運轉’並連動位於内側之該等扇葉32轉動。而當 該風扇在運轉時’將會帶動熱空氣進入該風扇内部，連帶 使得風扇内部所承受的溫度亦隨之增高，並使該磁鐵環34 之溫度亦隨之增高。如一般習知的外極式風扇停止運轉時 ，則易於造成該磁鐵環34馬上會接觸到外界之冷空氣而導 致急遽的熱脹冷縮而減損該磁鐵環34壽命的情況，但由於 在本發明中，是將該磁鐵環34包覆於該環框33之頂壁331 、内環繞壁332及外環繞壁333内，藉由該環框33之保護 ，不但可以有效阻隔大部份外界之冷空氣直接接觸發熱之 磁鐵環34表面，因此而可以有效防止該磁鐵環34因急遽 熱脹冷縮而產生龜裂、破損之情況發生，並能延長該外極 式風扇整體的使用壽命，再者，藉由遮覆於該磁鐵環34外 側之環框33 ’使該磁鐵環34被該内、外環繞壁332、333 予以包覆’不但能夠增強該磁鐵環34與該環框33間的結 合力，不易產生磁鐵環34脫落之情況，更能夠有效地防止 在磁鐵環34在高速運轉中碎裂時發生飛散的情況，而能夠 1324222 提升整體運作時的安全性β 、 如圖6所示，為本發明外極式風扇之扇輪裝置3的第 二較佳實施例，其大致是與該第一較佳實施例相同不同 之處在於’於該第一較佳實施例中，於該風扇基座4的基 殼體41上是設置有四個相間隔環圍於該扇輪震置3之磁極 柱單=44,而於該第二較佳實施例令，則是僅設置有一磁 . 極柱早％ 44，亦即為—般單定子外極式風扇之態樣，亦適 -φ 用於裝設本發明外極式風扇之扇輪裝置3。 綜上所述，藉由將該磁鐵環34裝設於該環框33之容 置槽330内而被該内、外環繞壁332、333予以包覆，因此 能夠避免該磁鐵環34在高溫τ直接遭受外界冷空氣之接觸 - ，防止該磁鐵環34因—再急遽的熱服冷縮作訂而產生龜 裂或破損’而能延長整體之使用期限，並且 步地提供該磁朗34與該環框33之間的結合力，而即使 在該磁鐵環34破損的情況下，亦能確保其在高速運轉時不 # t向外飛散碎裂’因此更能提高該外極式風扇在整體使用 上的安全性，故確實能達到本發明之功效。 *惟以上所述者，僅為本發明之二個較佳實施例而已， 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佛， 皆仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是-剖視圖，說明-習知的外極式散熱風扇； 圖2是-剖視圖，說明另一習知外極式散熱風扇之扇 11 1324222 輪裝置； 圖3是一剖視圖，說明圖2習知外極式散熱風扇之扇 輪裝置的另一種實施態樣； 圖4是一移除部份環框之立體分解圖，說明本發明外 極式風扇之扇輪裝置的第一較佳實施例； 圖5是一局部剖視圖，配合說明圖4 ;及 圖6是一立體分解圖，說明本發明外極式風扇之扇輪 裝置的第二較佳實施例。The hub 31 is rotatably sleeved on the shaft 412 and pivoted to the base housing 41 of the fan base 4. The hollow ring frame 33 is in the shape of a ring and is located on the inner side of the annular arrangement of the magnetic unit 44, and is surrounded by the pole unit 44. The ring frame has an annular top wall. 331 are inner and outer surrounding walls 332, 333 respectively extending from the top wall 331 in the same direction, and the inner surrounding wall 332 is connected to the outer edge of the blades 32, and the top wall 331, The inner surrounding wall 332 and the outer surrounding wall 333 together define an annular receiving groove 33〇. In the first preferred embodiment, the ring frame 33 can be - and directly formed with the fan blades 32, or by adhesive bonding or tight fitting, etc., so that the % frame 33 and the like The outer edges of the blades 32 are tightly coupled to each other to more accurately control the forming dimensions of the blades 32 and the ring frame 33 and to reduce additional fixing procedures to ensure better robustness. The magnet ring 34 is shaped to fit in the receiving groove 330 of the ring frame 33, and one side abuts the inner side of the ring frame 333 outside the ring frame 33, and the other side is abutted against the block. The magnetic plate 35 is mounted thereon, and the magnetic resistive plate % 疋 is formed in an inverted L shape and is made of a metal material, and the top wall 331 of the ring frame 33 can be insulated from the top surface of the magnet ring 34, and The inner wall 332 of the ring frame can be insulated from one side of the magnet ring 34, thereby having better magnetizing and anti-magnetic loss equivalent energy, so that the magnetic force of the magnet ring 34 is convenient for the clothes 33 The outer surrounding wall 333 is concentrated in the direction. In the first preferred embodiment, the magnet ring 34 is made of a general magnetic or rare earth magnet in a sintering process, and the magnet ring 34 is placed in the receiving groove 330 of the ring frame 33. The magnet ring 34 can be fixed directly in the ring frame 33 or in an adhesive manner. When the external pole fan is in operation, the magnet 43 of the magnet ring 34 corresponding to the position of the pole unit 44 is sensed by an inductor 43 mounted on the base housing 41, and simultaneously The induction coil 442 of the pole unit 44 is controlled to be energized to generate the same magnetic force as the magnet ring 34, and the magnetic ring 34 and the pole unit 44 are magnetically repulsive to start the operation. The blades 32 on the inside rotate. When the fan is running, it will drive hot air into the interior of the fan, which will increase the temperature inside the fan and increase the temperature of the magnet ring 34. When the conventional external fan is stopped, it is easy to cause the magnet ring 34 to immediately contact the cold air of the outside, resulting in rapid thermal expansion and contraction, thereby detracting from the life of the magnet ring 34, but In the invention, the magnet ring 34 is wrapped in the top wall 331 of the ring frame 33, the inner surrounding wall 332 and the outer surrounding wall 333. The protection of the ring frame 33 can effectively block most of the outside world. The cold air directly contacts the surface of the hot magnet ring 34, so that the cracking and breakage of the magnet ring 34 due to rapid thermal expansion and contraction can be effectively prevented, and the service life of the outer pole fan can be prolonged. The magnet ring 34 is covered by the inner and outer surrounding walls 332, 333 by a ring frame 33' covering the outer side of the magnet ring 34. This not only enhances the space between the magnet ring 34 and the ring frame 33. The bonding force is less likely to cause the magnet ring 34 to fall off, and the scattering of the magnet ring 34 during high-speed operation can be effectively prevented, and the safety of the overall operation can be improved by 1324222, as shown in FIG. For this hair A second preferred embodiment of the fan-wheel device 3 of the outer-extreme fan is substantially the same as the first preferred embodiment in that, in the first preferred embodiment, the fan base is The base housing 41 of the fourth housing 41 is provided with four magnetic poles that are spaced around the fan wheel 3; 44, and in the second preferred embodiment, only one magnetic pole is provided. As early as 44, which is the same as the single stator external pole fan, it is also suitable for mounting the fan wheel device 3 of the external pole fan of the present invention. In summary, the magnet ring 34 is covered by the inner and outer surrounding walls 332 and 333 by being mounted in the receiving groove 330 of the ring frame 33, so that the magnet ring 34 can be prevented from being at a high temperature τ. Directly subject to the contact of the outside cold air - to prevent the magnet ring 34 from being cracked or damaged due to the hot and cold contraction of the hot air, and to extend the overall service life, and to provide the magnetic Lang 34 and the step The bonding force between the ring frames 33, even in the case where the magnet ring 34 is broken, can ensure that it does not scatter and shatter at the time of high speed operation, thereby improving the overall use of the external pole fan. The safety of the above can indeed achieve the efficacy of the present invention. The above is only the two preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change made by the scope of the invention and the description of the invention. Both the Buddha and the Buddha are still covered by the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional external-pole cooling fan; FIG. 2 is a cross-sectional view showing another conventional external-pole cooling fan 11 1124222 wheel device; FIG. 3 is a FIG. 4 is an exploded perspective view showing a fan wheel device of the external pole type heat dissipating fan of FIG. 2; FIG. 4 is an exploded perspective view of a portion of the ring frame of the present invention, illustrating the fan wheel device of the external pole fan of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a partial cross-sectional view, with reference to FIG. 4; and FIG. 6 is an exploded perspective view showing a second preferred embodiment of the fan-wheel device for an external-pole fan of the present invention.
12 1324222 【主要元件符號說明】 3 扇輪裝置 4 風扇基座 31 輪毅 41 基殼體 32 扇葉 411 基板 33 環框 412 轴桿 330 容置槽 42 殼蓋 331 頂壁 43 感應器 332 内環繞壁 44 磁極柱早元 333 外環繞壁 441 磁極座 34 磁鐵環 442 感應線圈 35 阻磁板 1312 1324222 [Description of main components] 3 Fan wheel unit 4 Fan base 31 Wheel 41 base 32 Fan blade 411 Base plate 33 Ring frame 412 Shaft 330 Locating groove 42 Cover 331 Top wall 43 Sensor 332 Inner surround Wall 44 Magnetic pole Early element 333 Outer surrounding wall 441 Magnetic pole seat 34 Magnet ring 442 Induction coil 35 Magnetostrictive plate 13