201111642 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種離心風扇，尤其涉及一種對電 子元件散熱的離心風扇。 【先前技術】201111642 VI. Description of the Invention: [Technical Field] The present invention relates to a centrifugal fan, and more particularly to a centrifugal fan that dissipates heat from an electronic component. [Prior Art]
當前，隨著電腦產業的迅速發展，微處理晶片 等發熱電子元件產生的熱量愈來愈多。為將該等多 餘的熱量有效散發，習知的方法為在發熱電子元件 的表面貼設一吸熱塊，並提供一熱管及一散熱鰭片 組’將該熱管的兩端分別與吸熱塊及散熱鰭片組連 接’然後在該散熱鰭片組附近設置一離心風扇，利 用該離心風扇產生的冷卻氣流對該散熱鰭片組進行 強制散熱’從而將發熱電子元件產生的熱量散去。 習知的離心風扇通常包括一扇框及設於該扇框 内的一葉輪，該扇框的底板上設有一入風口，該入 風口内設有一用於支撐葉輪旋轉的支架。習知的離 心風扇通常通過分別在支架和扇框上設置相互對應 :螺紋孔，螺釘穿過所述螺紋孔而將支架與扇框固 定連接’風扇I作時，位於支架上的葉輪高速旋轉 曰、使支架相對扇框晃動，巾由於扇框的厚度較 薄’持續的晃動容㈣致扇框上供螺釘穿 内的螺紋的螺牙崩掠. 释、札 框卜而支架不能穩11的固定在扇 上而支撐葉輪平穩的旋轉。 201111642 【發明内容】 有鑒於此，有必要提供一種能將支架穩固地固 定在扇框上以平穩支撐葉輪旋轉的離心風扇。 一種離心風扇’包括一扇框及設於該扇框内的 一葉輪，該扇框包括一底板，該底板上設有一入風 口，該入風口内設有一支架，該葉輪安裝在支架上， 該底板的底面上於入風口的周圍向下延伸突出形成At present, with the rapid development of the computer industry, heat generated by heat-generating electronic components such as micro-processed wafers is increasing. In order to effectively dissipate the excess heat, a conventional method is to attach a heat absorbing block to the surface of the heat-generating electronic component, and provide a heat pipe and a heat-dissipating fin set. The fin group connection ' then a centrifugal fan is disposed in the vicinity of the heat sink fin group, and the heat sink fins are forcibly dissipated by the cooling airflow generated by the centrifugal fan to dissipate heat generated by the heat generating electronic components. A conventional centrifugal fan usually includes a frame and an impeller disposed in the frame. The bottom of the frame is provided with an air inlet, and a bracket for supporting the rotation of the impeller is disposed in the air inlet. Conventional centrifugal fans usually have a corresponding correspondence between the bracket and the fan frame: a threaded hole through which the screw is fixedly connected to the frame by the screw. When the fan I is used, the impeller on the bracket rotates at a high speed. The bracket is swayed relative to the frame, and the thickness of the fan frame is thin. The continuous swaying capacity (4) causes the thread on the fan frame to be broken by the thread inside the screw frame. The frame is not fixed and the bracket is not stable. Support the smooth rotation of the impeller on the fan. 201111642 SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a centrifugal fan that can stably fix a bracket on a fan frame to smoothly support the rotation of the impeller. A centrifugal fan includes a frame and an impeller disposed in the frame. The frame includes a bottom plate. The bottom plate is provided with an air inlet. The air inlet is provided with a bracket, and the impeller is mounted on the bracket. The bottom surface of the bottom plate extends downwardly and protrudes around the air inlet
多個凸柱，所述凸柱的中部設有—螺紋孔，該支架 上設有與所述凸柱分別對應的多個通孔，該支架的 通孔分別穿設於所述底板的凸柱上，多個螺釘分別 與所述凸柱的螺紋孔螺合而將該支架固定在該底板 的底面上。 與習知技術相&，上述離心風扇的凸柱的設 置，可將支架組裝在底板上，實3見支架的定位，同 時增加了該底座上的螺紋孔的厚度，防止習知技術 中因底座較薄而使螺紋孔的螺牙崩壞。 【實施方式】 以下參照附圖，結合實施例對本發明予以進一 步說明。 一扇框12及 如圖1所示，該離心風扇10包括 設於該扇框12内的一葉輪14。 12包括一底座 以及蓋設於該 請同時參閱圖2及圖3,該扇框 16、設於該底座16底端的一支架μ 201111642 底座16上的一蓋板19。 該底座16包括一底板16〇及由該底板16〇的周 緣向上延伸形成的一側壁162。該底板160的中部 ' 對應該葉輪14的位置設有一圓形的入風口 164，該 底板160的底面於該入風口 164的周緣位置向其頂 面方向凹陷形成一圓環形的台階163。該台階163 上等間隔設有三個圓柱形的凸柱167，所述凸柱167 • 由該台階16:3的表面向下垂直延伸形成。每個凸柱 167的中部没有一螺紋孔165，所述螺紋孔由該 凸柱167的底端向上延伸至貫穿該台階163。該側 壁162呈渦形，其一側設有與該入風口 164垂直的 一出風口 166。 該支架18大致為圓盤狀，其設於該底座16的 入風口 164内且其外邊緣抵靠於該底座16的台階 φ 163上。該支架18包括一圓環形的固定部180、設 於該固定部180内的一支撐板182及連接於該固定 部180與該支撐板182之間的三個肋條186。該固 定部180為圓環形的平板狀，該固定部18〇的頂面 外周緣向下凹陷形成一圓環形的台階部181，該台 階部181的大小與該台階163的大小相當，以在該 支架18組裝在該底座16的入風口 164内時，該台 階部181剛好抵靠在該底座16的台階163上，且使 該支架18的底面與該底座16的底板160的底面在 201111642 同一平面上。該台階部181的外周緣向外延伸形成 三個分別與該底座16的凸柱167對應的突耳185。 每一突耳185大致呈半圓形，各突耳185的中央對 應設有一個通孔183，所述通孔183的孔徑與所述 凸柱167的外徑相等，以在該台階部ι81抵靠在該 底座16的台階163上時，該凸柱167可剛好對應穿 设於該台階部181上的通孔183内，從而將該支架 18的預組裝在該底座16上。該支撐板182大致為 圓形板狀，並設於該圓環形的固定部18〇的中部。 該支撐板182的頂面中部向上垂直延伸形成一管體 187，該管體187内收容一軸承188。該等肋條 等間隔设置並將支撐板182的外緣與該固定部18〇 的内緣相連接。 具體實施時，該底座16上的凸柱167的數量不a plurality of studs, wherein the middle of the stud is provided with a threaded hole, and the bracket is provided with a plurality of through holes corresponding to the protruding columns, and the through holes of the bracket respectively pass through the protruding columns of the bottom plate Upper, a plurality of screws are respectively screwed with the threaded holes of the studs to fix the brackets on the bottom surface of the bottom plate. In combination with the prior art, the above-mentioned centrifugal fan's studs can be assembled on the bottom plate, and the position of the bracket is increased, and the thickness of the threaded hole on the base is increased to prevent the conventional technology. The base is thin and the threaded holes are broken. [Embodiment] Hereinafter, the present invention will be further described with reference to the accompanying drawings. A frame 12 and as shown in FIG. 1, the centrifugal fan 10 includes an impeller 14 disposed in the frame 12. 12 includes a base and a cover. Please refer to FIG. 2 and FIG. 3 together. The frame 16 is a cover 19 disposed on the base 16 of the bracket μ 201111642 at the bottom end of the base 16 . The base 16 includes a bottom plate 16 and a side wall 162 extending upward from a periphery of the bottom plate 16 . The central portion of the bottom plate 160 is provided with a circular air inlet 164 corresponding to the position of the impeller 14, and the bottom surface of the bottom plate 160 is recessed toward the top surface of the air inlet 164 to form a circular step 163. The step 163 is equally spaced apart from three cylindrical studs 167 which are formed by the surface of the step 16:3 extending vertically downward. There is no threaded hole 165 in the middle of each of the studs 167, and the threaded holes extend upward from the bottom end of the stud 167 to penetrate the step 163. The side wall 162 has a spiral shape, and an air outlet 166 perpendicular to the air inlet 164 is provided on one side thereof. The bracket 18 is substantially disk-shaped and is disposed in the air inlet 164 of the base 16 with its outer edge abutting against the step φ 163 of the base 16. The bracket 18 includes a circular fixing portion 180, a supporting plate 182 disposed in the fixing portion 180, and three ribs 186 connected between the fixing portion 180 and the supporting plate 182. The fixing portion 180 is in the form of a circular flat plate. The outer peripheral edge of the top surface of the fixing portion 18 is recessed downward to form a circular step portion 181. The size of the step portion 181 is equivalent to the size of the step 163. When the bracket 18 is assembled in the air inlet 164 of the base 16, the step portion 181 just abuts against the step 163 of the base 16, and the bottom surface of the bracket 18 and the bottom surface of the bottom plate 160 of the base 16 are at 201111642. On the same plane. The outer periphery of the step portion 181 extends outward to form three lugs 185 respectively corresponding to the studs 167 of the base 16. Each of the lugs 185 is substantially semi-circular, and a center of each of the lugs 185 is correspondingly provided with a through hole 183. The diameter of the through hole 183 is equal to the outer diameter of the stud 167 to be offset by the step ι81. When the pedestal 163 is placed on the step 163 of the base 16, the protrusion 167 can be correspondingly inserted into the through hole 183 of the step portion 181, so that the bracket 18 is pre-assembled on the base 16. The support plate 182 has a substantially circular plate shape and is disposed at a central portion of the annular fixing portion 18A. A central portion of the top surface of the support plate 182 extends vertically upward to form a tubular body 187, and a bearing 188 is received in the tubular body 187. The ribs are equally spaced and connect the outer edge of the support plate 182 to the inner edge of the fixed portion 18A. In specific implementation, the number of the studs 167 on the base 16 is not
143 ’該輪較140的頂壁 的周緣向下延伸形成的一環形的側壁 L4〇的頂壁141的中心向支撐板 182所 201111642 在方向延伸形成一芯軸144,該葉輪14通過芯軸U4 裝配在軸承188中從而可旋轉地安裝於支撐板182 上，並收容於該底座16内。 該蓋板19的形狀與底板160的形狀相似，所述 蓋板19中間開設一圓形入風口 19〇。 組裝時，將該支架18的通孔183分別對應套設 於該底板160的凸柱167上’並使該支架18的台階 部181抵靠在該底板16〇的台階ία上，從而將該 支架18定位在底板160上，再通過螺釘17與該凸 柱167的螺紋孔165螺合，實現將支架18固定至底 板160的底面上。將該輪轂14〇内的芯轴144裝配 於管體187中的軸承188内，從而將葉輪14裝配到 底座16上，將蓋板19對應蓋設於側壁162的頂端。 該離心風扇10通過其底座16上凸柱167的設置， 增加了該底座16上的螺紋孔165的厚度，防止習知 技術中因底座16較薄而使螺紋孔165的螺牙崩壞， 同時，該凸柱167設置於該底座16的外侧，不會因 阻礙扇框12内的氣流暢通而產生噪音。 综上所述，本發明符合發明專利之要件爰依 法提出專利申請。惟以上所述者僅為本發明之較佳 實施例，舉凡熟悉本案技藝之人士，在妥依本發明 精神所作之等效修飾或變化，皆應涵蓋於以下之申 5奢專利範圍内。 201111642 【圖式簡單說明】 圖1為本發明離心風扇一實施例的立體組合 圖2為圖1的立體分解圖。 圖3為圖2倒置時的立體分解圖。 圖4為圖2中支架的另一實施例的立體圖。 【主要元件符號說明】143 'The center of the top wall 141 of an annular side wall L4 that extends downwardly from the periphery of the top wall of the wheel 140 extends toward the support plate 182 201111642 to form a mandrel 144 that passes through the mandrel U4. It is assembled in the bearing 188 so as to be rotatably mounted on the support plate 182 and housed in the base 16. The shape of the cover plate 19 is similar to the shape of the bottom plate 160, and a circular air inlet 19 开设 is defined in the middle of the cover plate 19. When assembled, the through holes 183 of the bracket 18 are respectively sleeved on the protrusions 167 of the bottom plate 160 and the step portion 181 of the bracket 18 is abutted against the step ία of the bottom plate 16〇, thereby the bracket 18 is positioned on the bottom plate 160 and screwed into the threaded hole 165 of the stud 167 by the screw 17, so that the bracket 18 is fixed to the bottom surface of the bottom plate 160. The mandrel 144 in the hub 14 is fitted into the bearing 188 in the tubular body 187 to assemble the impeller 14 to the base 16, and the cover 19 is correspondingly disposed at the top end of the side wall 162. The centrifugal fan 10 increases the thickness of the threaded hole 165 on the base 16 through the arrangement of the boss 167 on the base 16 to prevent the screw of the threaded hole 165 from collapsing due to the thinness of the base 16 in the prior art. The protrusion 167 is disposed outside the base 16 and does not generate noise by hindering the airflow in the fan frame 12. In summary, the present invention complies with the requirements of the invention patent and submits a patent application in accordance with the law. 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 should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a centrifugal fan according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of Fig. 1. Figure 3 is an exploded perspective view of Figure 2 when inverted. 4 is a perspective view of another embodiment of the bracket of FIG. 2. [Main component symbol description]
離心風屬 10 扇框 12 葉輪 14 底座 16 螺釘 17 支架 18 蓋板 19 輪轂 140 頂壁 141 葉片 142 侧壁 143 芯轴 144 底板 160 側壁 162 台階 163 入風口 164 螺紋孔 165 出風口 166 凸柱 167 固定部 180 台階部 181 201111642 支樓板 182 通孔 183 突耳 185 肋條 186 管體 187 軸承 188 入風口 190Centrifugal wind 10 frame 12 impeller 14 base 16 screw 17 bracket 18 cover 19 hub 140 top wall 141 blade 142 side wall 143 mandrel 144 bottom plate 160 side wall 162 step 163 air inlet 164 threaded hole 165 air outlet 166 stud 167 fixed Section 180 Step 181 201111642 Supporting floor 182 Through hole 183 Lug 185 Rib 186 Tube 187 Bearing 188 Air inlet 190