1330692 九、發明說明： 【發明所屬之技術領域】 本發明係涉及-種扇葉結構，特別涉及一種用於離心 風扇之扇葉結構。 【先前技術】1330692 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a blade structure, and more particularly to a blade structure for a centrifugal fan. [Prior Art]
近年來隨著電子產業之發展，電子元件之性能不斷提 升’運算速度齡職，其㈣日日日片欧運魏度不斷提 升丄晶h作時所散發之熱量也相應增加，如果不將這些 熱量及時極大影響電子元狀性能，使電^ 凡件之運异速度降低，隨著熱量之不斷累積，還可能燒毁 電子元件，故，必賴電子元件妨散熱，在有限之系統 空間内’對電子元件散熱通常採用_空間較小之離心風 扇。該離傾扇通常包括―扇框、—輪轂纽輪穀為中心 呈輪射狀向外延伸之複數扇葉，該扇框具有分別位於复頂 面和底面之上、下進風口及側面之—出風口。卫作時，通 過扇葉旋轉帶__氣㈣，雜進風口進人之轴向氣 流轉向為沿該輪轂讀向氣额從出風口排出。In recent years, with the development of the electronics industry, the performance of electronic components has been continuously improved. 'Operational speed is the age of the job. (4) The daily heat of the Japanese film, the European Games, the Weidu, and the heat generated by the crystals are increased accordingly. The heat greatly affects the electronic elementary performance in time, so that the speed of the electrical parts is reduced. As the heat accumulates, the electronic components may be burned. Therefore, the electronic components must dissipate heat in a limited system space. For the heat dissipation of electronic components, a centrifugal fan with a small space is usually used. The tilting fan usually comprises a plurality of blades extending radially outwardly from the center of the wheel hub, and the wheel frame has a plurality of blades respectively located above the top and bottom surfaces, the lower air inlet and the side surface. Air outlet. In the case of the maintenance, the axial airflow is turned by the fan blade rotation __ gas (four), and the axial airflow entering the air inlet is discharged from the air outlet along the read air volume of the hub.
曰月IJ 、 本·技術人h要㈣改變扇葉之形狀; 達到產生較大之職和風量之目的，然而朗框之上 進風口之大小基本相同且均小於輕之外徑，組裝時車 =框之間之同心度及垂直度不容易控制，為防止該4 •動時與雜產生縣，扇葉與雜伽與底面之間； 1證至少1mm左右之間隙’故，在有限之空間限们 不官扇葉之葉形如何變化H風扇工作時產生之届 6 進而影響散熱效率。 矛風里之提高也受到限制， 【發明内容】 writ 匕 風 種扇葉結構，包 铒·。風扇 複數屬葉，逻 *轂及從輪轂周緣向外延伸之 括1形之=；：與扇葉之頂部相連之葉盤，該葉盤包 從㈣壁之底^緣向下延伸之一側壁及 結構；=包框及收容於該扇框内之扇葉 數扇葉及—Ί讀穀觸向外延伸之複 1劈赖與輕之卿連接，該葉盤包括 壁，該頂壁與該扇框之頂面相齊平。 與習知技術相比，採用該扇葉結構之離心風扇，該葉 頂壁與該扇框之頂面相齊平，鱗之頂端直接延伸至 •Ά葉盤之頂壁連接成—體，扇葉與扇框之頂板之間沿抽 向無需預留f姐，在有限純空間之限制及扇葉之葉形相 同之情況下，增加扇葉之主要掃風截面高度，從而大大增 加了該離心風扇之風量及風壓。 【實施方式】 下面參照附圖’結合實施例對本發明作進一步說明。 請參閱圖1及圖2 ’該離心風扇包括一扇框20、收容於 該扇框20内之一定子（圖未示）及相對於該定子旋轉之一 轉子40〇 該扇框20包括一頂板21、一底板22及連接於該頂板21 及底板22之間之侧板23。該頂板21、底板22與側板23共同 形成一容置所述定子和轉子40之容置空間，其中，該定子 收容於轉子40之内部，該扇框20之頂板21與底板22平行設 置，分設於該轉子40之上下兩側。該頂板21與底板22之中 央位置，即正對轉子40之位置處分別形成圓形之上、下入 風口24a、24b，該側板23於扇框20之一侧形成一出風口25。 其中’該上入風口24a之直徑大於下入風口24b之直徑。 請一併參閱圖3與圖4，該轉子40包括一扇葉結構。該 扇葉結構包括一輪轂41、環設於該輪轂41外圍之複數扇葉 42及設於所述扇葉42遠離輪轂41之末端之頂面並與其相互 連接之一葉盤44，該輪穀41包括一圓形頂面41〇及一從頂面 410周緣垂直向下延伸之環形壁412，所述扇葉42從該輪轂 41之裱形壁412呈放射狀向外延伸，且均勻地分佈於輪轂41 之外圍，從而使該扇葉結構旋轉時不會產生晃動。 «月一併參閱圖4及圖5，每一扇葉42包括一與環形壁412 相連接之第-扇‘葉部422及自第一扇葉部422之末端彎折之 第二扇葉部424 ’其中’該第一扇葉部422從環形壁412外圍 沿順時針方向傾斜延伸，該第二扇葉部424從第-扇葉部 422末端沿逆時針方向糟彎折延伸。每-f-扇葉部422 具有^別與環形壁412之頂端及底端連接之上表面及下表 面/、中，該上表面呈凹弧形，且沿扇葉42遠離環形壁 之延伸方向向上逐漸突出延伸，該下表面亦呈凹弧形，且 沿扇葉4塊離環形壁412之延伸方向向下逐漸突出延伸，從 而使該第-扇葉部422之高度從靠近輪轂Μ之—端向外逐 漸增大。所述第二扇葉部424彎曲呈弧形，每一第二扇葉部 424與相應之第一扇葉部422相切，具有分別與該第一 部422之上、下表面之末端連接之上、下表面。所述第二扇 葉部424之上、下表面相互平行且分別平行於輪轂“之頂面 410，該第一扇葉部424之高度沿其延伸之方向恒定。 該葉盤44與扇葉42通過射出的方法一體成型。該葉盤 44包括一環形之頂壁441、從頂壁441外周緣垂直向下延伸 之呈環形之側壁442及從側壁442之底端水平向外延伸之折 邊443。該頂壁441收容於扇框2〇之上入風口24a内，其上表 面與頂板21之上表面相平齊，其内徑之大小與下入風口24b 之大小大致相同，其外徑之大小大致與扇葉42之外徑相同 且略小於上入風口24a之大小。該葉盤44之頂壁441可恰好 覆蓋于第二扇葉部424之上表面上，側壁442與第二扇葉部 424之最外側邊緣424a對齊並包覆於所述第二扇葉部424之 最外側邊緣424a之頂端之外圍，而折邊443則延伸至扇框20 之頂板21之内側·邊緣之正下方（如圖2所示），為避免該離 心風扇工作時該扇葉結構高速轉動與頂板21之間產生摩 擦，該葉盤44之側壁442 (即頂壁441之外周緣）與頂板21 之上入風口 24a處之内周緣之間及折邊443與頂板21之之間 分別間隔一微小之間距’本實施例中，該側壁442與頂板21 之上入風口24a處之内周緣之間間隔大致〇 5mm之距離，且 折邊443與頂板21之間間隔大致〇.5mm之距離。如圖5所示 為該扇葉結構之仰視圖，每一扇葉42之第一扇葉部422投影 後呈直線形’從輪轂41之周緣呈放射狀向外延伸，並位於 葉盤44之頂壁441之投影内部，該第二扇葉部424投影後呈 弧線形，並正好位於該葉盤44之頂壁441之投影上，每相鄰 之兩扇葉42之間，即相鄰之兩第二扇葉部424及與之對應連 接之兩相鄰第—扇葉部422之間均形成氣流通道。^ 如圖2所示，該葉盤44設置於扇框2〇之上入風口 2如 内，頂壁441之位置與該扇框2〇之頂板21之位置相齊平。習 知技術中’ 般離傾扇之扇葉之高度大致在6麵〜8mm 之間，而扇框之頂板之厚度大致為〇3mm，為防止風扇工 作枯扇葉與頂板之間摩擦而于扇葉與頂板之間沿轴向所預 留之間隙至少為1mm。採用該扇葉結構之離心風扇，該葉 盤44可收容於該上入風口2知處，頂壁441之位置與該頂板 21之位置齊平，扇葉42之第二扇葉部424之頂端直接延伸至 與該葉盤44之頂壁441連接成一體，故，扇葉42與扇框2〇 之頂板21之間沿轴向無需預留間隙，當葉盤44之厚度為 〇.5mm時’可使得該扇葉42之高度增加〇.8mm，且該葉盤44 取代一部分扇框·2〇覆蓋該上入風口 24a大於下入風口 24b之 部分’使原來直徑較大之上入風口24a之實際入風面積減小 至基本上與下入風口24b相等，不會產生漏風或其他不良之 效果。該扇葉42之高度增加0.8mm，即增加扇葉42之第二 扇葉部424處之主要掃風截面高度〇.8mm，該扇葉42之高度 相比原有愚度增加接近10%以上’從而大大增加了該離心 風扇之風量及風壓。經實驗驗證得知，採用上述扇葉結構 之離心風扇，當該扇葉之高度增加〇.8mm時，可使該離心 風扇之風量及風壓增加8%〜13%。 1330692曰月 IJ, 本······································································································· = Concentricity and verticality between the frames are not easy to control, in order to prevent the 4 • movement and miscellaneous generation of the county, between the fan blade and the hybrid gamma and the bottom surface; 1 the card at least 1mm or so gap, so in a limited space How to change the shape of the leaf of the fan blade is not affected by the operation of the H fan, which affects the heat dissipation efficiency. The improvement of the spear wind is also limited, [Summary] writ 匕 wind species fan blade structure, including 铒·. The fan is a plurality of leaves, a logical hub and a shape extending outward from the periphery of the hub; a leaf disc connected to the top of the blade, the leaf disc extending downward from a bottom edge of the wall And the structure; = the frame and the number of blades of the blade contained in the frame and the extension of the valley to the outside of the valley and the connection of the light, the blade comprises a wall, the top wall and the The top surface of the fan frame is flush. Compared with the prior art, the centrifugal fan adopting the fan blade structure, the top wall of the leaf is flush with the top surface of the fan frame, and the top end of the scale directly extends to the top wall of the Ά leaf disk to form a body, the blade There is no need to reserve the f-sister between the top plate of the fan frame, and the height of the main sweeping section of the fan blade is increased under the limitation of the limited pure space and the blade shape of the fan blade, thereby greatly increasing the centrifugal fan. The amount of wind and wind pressure. [Embodiment] Hereinafter, the present invention will be further described with reference to the accompanying drawings. Referring to FIG. 1 and FIG. 2, the centrifugal fan includes a frame 20, a stator (not shown) received in the frame 20, and a rotor 40 rotated relative to the stator. The fan frame 20 includes a top plate. 21. A bottom plate 22 and a side plate 23 connected between the top plate 21 and the bottom plate 22. The top plate 21, the bottom plate 22 and the side plate 23 together form an accommodating space for accommodating the stator and the rotor 40. The stator is housed in the interior of the rotor 40. The top plate 21 of the frame 20 is disposed in parallel with the bottom plate 22. It is disposed on the upper and lower sides of the rotor 40. The central portion of the top plate 21 and the bottom plate 22, that is, the position facing the rotor 40, respectively form a circular upper and lower air inlets 24a, 24b, and the side plate 23 forms an air outlet 25 on one side of the fan frame 20. The diameter of the upper air inlet 24a is larger than the diameter of the lower air inlet 24b. Referring to Figures 3 and 4 together, the rotor 40 includes a blade structure. The blade structure includes a hub 41, a plurality of blades 42 disposed around the periphery of the hub 41, and a blade 44 disposed on the top surface of the blade 42 away from the end of the hub 41 and interconnected with the blade 44. The valley 41 The utility model comprises a circular top surface 41〇 and an annular wall 412 extending vertically downward from a circumference of the top surface 410. The blade 42 extends radially outward from the dome-shaped wall 412 of the hub 41 and is evenly distributed The periphery of the hub 41 is such that the blade structure does not sway when rotated. Referring to Figures 4 and 5, each blade 42 includes a first fan blade portion 422 coupled to the annular wall 412 and a second blade portion bent from the end of the first blade portion 422. 424 'where the first blade portion 422 extends obliquely from the periphery of the annular wall 412 in a clockwise direction, and the second blade portion 424 extends from the end of the first blade portion 422 in a counterclockwise direction. Each of the -f-blade portions 422 has a top surface and a lower surface/in, which are connected to the top end and the bottom end of the annular wall 412. The upper surface has a concave arc shape and extends along the fan blade 42 away from the annular wall. The lower surface gradually protrudes upward, and the lower surface is also concavely curved, and gradually extends downward along the extending direction of the fan blade 4 from the annular wall 412, so that the height of the first blade portion 422 is close to the hub. The end gradually increases outward. The second blade portion 424 is curved in an arc shape, and each of the second blade portions 424 is tangential to the corresponding first blade portion 422 and has a connection with an upper end and a lower surface of the first portion 422, respectively. Upper and lower surfaces. The upper and lower surfaces of the second blade portion 424 are parallel to each other and respectively parallel to the top surface 410 of the hub. The height of the first blade portion 424 is constant along the direction in which it extends. The leaf disk 44 and the blade 42 The leaf disc 44 includes an annular top wall 441, an annular side wall 442 extending vertically downward from the outer periphery of the top wall 441, and a flange 443 extending horizontally outward from the bottom end of the side wall 442. The top wall 441 is received in the air inlet 24a above the fan frame 2, and the upper surface thereof is flush with the upper surface of the top plate 21, and the inner diameter thereof is substantially the same as the size of the lower air inlet 24b, and the outer diameter thereof is The size is substantially the same as the outer diameter of the blade 42 and slightly smaller than the size of the upper air inlet 24a. The top wall 441 of the blade 44 can just cover the upper surface of the second blade portion 424, the side wall 442 and the second blade The outermost edge 424a of the portion 424 is aligned and wrapped around the periphery of the top end of the outermost edge 424a of the second blade portion 424, and the flange 443 extends directly below the inner edge of the top plate 21 of the fan frame 20. (as shown in Figure 2), to avoid the high fan blade structure when the centrifugal fan is working The friction is generated between the rotation and the top plate 21, and the side wall 442 of the leaf disc 44 (i.e., the outer circumference of the top wall 441) and the inner circumference of the air inlet 24a above the top plate 21 and between the flange 443 and the top plate 21 are respectively The distance between the gaps is small. In this embodiment, the distance between the side wall 442 and the inner peripheral edge of the air inlet 24a above the top plate 21 is substantially 〇5 mm, and the gap 443 and the top plate 21 are spaced apart by approximately 55 mm. The distance is as shown in Fig. 5. The first blade portion 422 of each blade 42 is linear after being projected, and extends radially outward from the circumference of the hub 41, and is located at the leaf disk. Inside the projection of the top wall 441 of the 44, the second blade portion 424 is curved after being projected, and is located on the projection of the top wall 441 of the leaf disc 44, between each adjacent two blades 42 An air flow passage is formed between the adjacent two second blade portions 424 and the two adjacent first blade portions 422 connected thereto. As shown in FIG. 2, the blade disk 44 is disposed above the fan frame 2 If the air inlet 2 is inside, the position of the top wall 441 is flush with the position of the top plate 21 of the frame 2, which is conventionally The height of the fan blade of the tilting fan is generally between 6 and 8 mm, and the thickness of the top plate of the fan frame is approximately 〇3 mm. To prevent the fan from working between the blade and the top plate, the blade is placed along the axis between the blade and the top plate. The reserved gap is at least 1 mm. The centrifugal fan of the fan blade structure can be accommodated in the upper air inlet 2, and the position of the top wall 441 is flush with the position of the top plate 21, and the fan blade The top end of the second blade portion 424 of the 42 is directly extended to be integrated with the top wall 441 of the blade disc 44. Therefore, there is no need to reserve a gap between the blade 42 and the top plate 21 of the fan frame 2 in the axial direction. When the thickness of the leaf disc 44 is 〇.5 mm, the height of the blade 42 can be increased by 〇8 mm, and the leaf disc 44 replaces a part of the fan frame. 2 〇 covers the portion of the upper air inlet 24a larger than the lower air inlet 24b. The actual air inlet area of the air inlet 24a having a larger diameter is reduced to be substantially equal to the lower air inlet 24b, and no air leakage or other undesirable effects are generated. The height of the blade 42 is increased by 0.8 mm, that is, the height of the main sweeping section at the second blade portion 424 of the blade 42 is increased by 88 mm, and the height of the blade 42 is increased by more than 10% compared with the original fool. 'This greatly increases the air volume and wind pressure of the centrifugal fan. It has been experimentally verified that the centrifugal fan with the above-mentioned fan blade structure can increase the air volume and the wind pressure of the centrifugal fan by 8% to 13% when the height of the blade is increased by 〇8 mm. 1330692
該扇葉結構設置於扇框20之上入風口24a内時，在有限 之系統空間内’不論該扇葉42之葉形如何變化，均可增加 其高度’如圖6所示為本發明扇葉結構之另一實施例，葉盤 44a之頂壁441a設置于扇葉42a之中部之上表面上，該扇葉 42a之上表面順沿葉盤44a之側壁442a向下彎折後，繼續順 沿葉盤44a之折邊443a向外水平延伸，該葉盤44a之折邊 443a之末端與扇葉42a之最外側邊緣424b對齊，組裝後該折 邊443a伸入至扇框20之頂板21之内側邊緣之正下方。 综上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技#之人士’在爰依本發明精神所作之等效修飾 或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】When the blade structure is disposed in the air inlet 24a above the fan frame 20, the height of the blade 42 may be increased in a limited system space, as shown in FIG. In another embodiment of the leaf structure, the top wall 441a of the leaf disc 44a is disposed on the upper surface of the middle portion of the blade 42a, and the upper surface of the blade 42a is bent downward along the side wall 442a of the leaf disc 44a, and continues to be smooth. Extending outwardly along the flange 443a of the leaf disc 44a, the end of the flange 443a of the leaf disc 44a is aligned with the outermost edge 424b of the blade 42a. After assembly, the flange 443a extends into the top plate 21 of the fan frame 20. Just below the inside edge. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art to the present invention are intended to be included in the following claims. [Simple description of the map]
圖1係本發明離心風扇一較佳實施例之分解圖。 圖2係圖1所示離心風扇組裝後切除部分之示意圖 圖3係圖1所示離心風扇中扇葉結構之放大圖。面 圖4係圖3中沿ΐν_ιν線之剖面示意圖。 圖5係圖2之仰視圖。 圖6係本發明扇葉結構之另一實施例之剖面示意圖 【主要元件符號說明】 扇框 20 底板 22 上、下入風口 24a、24b 扇葉結構 40 頂面 410 頂板 側板 出風口 輪轂 環形壁 21 23 25 41 412 11 1330692 扇葉 第二扇葉部 葉盤 側壁 42、42a 第一扇葉部 424 最外側邊緣 424a 44、44a 頂壁 441 442、442a 折邊 443 422 424b 441a 443aBRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of a preferred embodiment of a centrifugal fan of the present invention. Fig. 2 is a schematic view showing the cut-away portion of the centrifugal fan shown in Fig. 1. Fig. 3 is an enlarged view showing the structure of the blade in the centrifugal fan shown in Fig. 1. Figure 4 is a schematic cross-sectional view along line ΐν_ιν in Figure 3. Figure 5 is a bottom view of Figure 2. 6 is a schematic cross-sectional view showing another embodiment of the blade structure of the present invention. [Main component symbol description] Fan frame 20 Base plate 22 Upper and lower air inlets 24a, 24b Fan blade structure 40 Top surface 410 Top plate side plate air outlet hub annular wall 21 23 25 41 412 11 1330692 Fan blade second blade leaf disc side wall 42, 42a First blade portion 424 Outer outer edge 424a 44, 44a Top wall 441 442, 442a Fold 443 422 424b 441a 443a
1212