.201016117 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種散熱裝置，特別涉及一種離心風扇。 【先前技術】 〇.201016117 IX. Description of the Invention: [Technical Field] The present invention relates to a heat dissipating device, and more particularly to a centrifugal fan. [Prior Art] 〇
隨著電腦產業的迅速發展，CPU追求高速度化，高功 能化及小型化所衍生的散熱問題越來越嚴重，這在筆記本 電腦等内部空間狹小的電子裝置中更為突出。如果無法將 筆記本電腦内的CPU等電子元件所產生的熱量及時有效地 散發出去，將極大地影響電子元件的工作性能，同時還會 縮減電子元件的使用壽命，因此必須對電子元件進行散熱。 目前在電腦内，常採用散熱模組將電子元件所產生的 熱量散發出去。如圖i所示，習知散熱模組100包括一第一 散熱片組93、一第二散熱片組94、一扇框9〇及一轉子98, 該轉子98收容於扇框90内。扇框9〇上形成一入風口朽、一 第-出風口 91及-第二出風口 92。該第一散熱片組”與第 二散熱片組94分別設於該第一出風口 91與第二出風口 ％ 處。轉子98轉動時，產生的氣流吹向第―、第二散熱片組 93、94°如圖1中所示流場，氣流於第-散熱片組93的右側 大，左侧小，吹向第二散熱片組94的氣流也是下侧大，上 侧小，風量分佈極其不均’降低了散熱片的利用率，影響 了散熱模組100的散熱性能。 【發明内容】 鑒於此，有必要提供一種可優化風量比 得到有效提升的離心風扇及具有該離心風扇的散熱裝置。 一種離心風扇’包括葉輪、底板及環繞底板的側壁， 201016117 該側壁上設有相鄰的第一出風口及第二出風口 •-生氣流排向第一出風口與第二出風口，該第一屮s"葉輪產 •.二出風口之間設有一凸塊’該凸塊沿離心風 ：口與第 心風扇的内部延伸，該凸塊改變流出第—出風口鱼^向離 風口的氣流量及氣流分佈，將氣流從第一出風口j二出 風口導出。 -、第二出 ❹ -種散熱裝置’包括一離心風扇、第一鰭 鰭片組，該離心風扇包括一葉輪、一底板及環繞底第二 壁’該侧壁上設有相鄰的第一出風口及第二出風口的； -韓片組與第二W組分職於該第—出風口與第 口處該葉輪產生氣流排向第_出風口' 第-出風口與第二出風口之間設有-凸塊，該=:離該 二扇的:卜部向離心風扇的内部延伸，該凸塊改變流：第： 出風風口的氣流量及氣流分佈，將氣流從第-出風口與第二出風口導出。 ❹ 術相比，該散熱裝置的凸塊阻播住了部分流 經第一餘^且的吼流’使之從第一鰭片組流出，增大了流 且的風量。使第-鰭片組的受風更均勾，提高 •«㈣用率。另，流向第二縛片組的氣流經凸塊 白，!^第二鰭片組的中段，使第二鰭片組的受風更均 :提同了第—·鰭片的利用率’從而提升了該散熱裝置的 散熱性能。 【實施方式】 _ 併參閱圖2及圖3，散熱裴置包括一離心風扇10、 第”、曰片組2〇及一第二鰭片組3〇。離心風扇1〇包括一葉 •201016117 輪13、一頂板14、一底板11及一渦形侧壁12。該頂板14與 .頂板14相對，該侧壁12設於頂板14與底板11之間。該頂板 • . 14、底板11及側壁12合圍構成一扇框，扇框内形成一容置 空間，葉輪13收容於該容置空間内。 該頂板14上設有一第一進風口 15，底板11上設有一第 二進風口 16，側壁12自底板11的周緣垂直向上延伸並環繞 底板11，側壁12上設有一第一出風口 17和與第一出風口 17 相鄰的一第二出風口 18。第一、第二出風口 17、18均呈直 ⑩線形，且相互垂直設置。第一、第二鰭片組20、30分別由 複數散熱鰭片堆疊而成，第一、第二鰭片組2〇、30的整體 外形分別與第一出風口 17和第二出風口 18相一致。該第一 鰭片組20與第二鰭片組30分別對應設置於第一出風口 17與 第二出風口 18處。 底板11上於第一、第二出風口 17、18之間向上凸設一 凸塊19，該凸塊19沿離心風扇1〇的扇框的外部向扇框的内 部延伸。凸塊19為一呈三角形的片狀體’凸塊19的底邊水 〇 平設於該底板11上，凸塊19沿離心風扇10轴向上的高度大 於零而不大於側壁12的高度。該凸塊19的高度自離心風扇 10的外部向離心風扇1〇的内部逐漸減小直至為零。該凸塊 19最外端不超出離心風扇1〇的最外端，凸塊19位於離心風 扇10内部的最内端與葉輪13之間的距離不小於1毫米，如此 便不會影響葉輪13的正常運轉。凸塊19可以與底板η一體 成型製成’也可單獨製成後設置於底板Π上。 散熱裝置工作時，熱管（圖未示）將發熱元件產生的 熱量快速傳導至第一、第二鰭片組2〇、30。離心風扇1〇的 .201016117 =輪13運轉時從第一進風口 15和第二進風口 16吸入冷氣 肌、.’里第出風口 17和第二出風口 18吹向分別設於第一出 >風口 17與第二出風口 18處的第一鰭片組2〇和第二鰭片組 3〇，從，將鰭片間的高溫氣流吹走。因吹向第一續片組如 右侧^氣流方向與鰭片間的流道方向大體一致，故流向該 處的瑕1飢較強。繼而氣流以葉輪13為中心旋轉吹向第一鰭 片組20的中段和左侧，氣流角度的變化使得流出第一韓片 組20的中段和左側的氣流較弱。然，當氣流繼續前行時遇 ©到凸塊19的阻擋，因凸塊19的高度從離心風扇1〇的外部向 内°卩遞減，故有部分氣流越過凸塊19繼續吹向第二鰭片組 〇而另邛刀被阻擋後轉向第一韓片組20的左侧。 如圖3所示，當增加凸塊19後，流向第一鰭片組2〇與第 二縛片組3G的風量產生了變化除了其右侧 流過的風量依然保持很大外，因凸塊19阻擔了一部分氣流 使八轉向、、·呈第-鰭片組20的左侧和中段流出，因而第一韓 片組20左側和中段的風量明顯增大，且分佈較均勻。另， ❹流向第二韓片組3〇的氣流被凸塊㈣住了一部分且因凸 塊19的引導氣流的方向發生改變，使得原本應流經第二轉 片組3〇下侧的強風被引導至第二鰭片組30的中段，使第二 韓片，且30的受風面積增大，從而也使風量分配更加均句， 提高了第二轉片的利用率。另，凸塊19使流經第一韓片組 20和第二鰭片組30的風量比發生了變化，流經第一韓片組 20的風量有所增加，相應地流經第二縛片組的風量相對 ，少’藉此’我們可根據需要，將主要發熱元件或發熱量 乂大的7G件所產生的熱量傳導給第一縛片組，利用第一 201016117 f片組20的較強的散熱能力迅速散熱，而將次要的或發熱 量較少的發熱元件與第二鰭片組3〇熱連接，從而優化散熱 .比’根據需要達到最優的散熱效果。 圖4所不為扇框的另一實施例，該扇框4〇與上述實施 例中的扇框相似，包括一底板41、一侧壁42，及設於該底 板41上的一凸塊49。該側壁42上形成第一出風口 ”和 第二出風口 18’該凸塊49設於第一出風口 17與第二出風 口 18的相交處，該扇框4〇與上述實施例的扇框的不同之 β處在於：該凸塊49為一呈三棱台形的塊狀體。該凸塊49 的厚度沿扇框40的外部向内逐漸減小，在高度方向上該凸 塊49的厚度從上向下逐漸增大。該凸塊49包括—第一侧 面44和一第一側面46，該第一侧面44面向第一出風口 17，第二侧面46面向第二出風口 18。該第一侧面44與第 一側面46相對底板41均呈傾斜狀，該兩側面44、46於扇 框40的内部相交至一側棱45，該側棱45相對底板‘I傾 斜。氣流吹向凸塊49時，撞擊在第一侧面44上，因第一 ❹側面44相對底板41呈傾斜狀，過渡較為平緩，氣流撞擊 在第一侧面44上產生的噪音相對減小，從而降低散熱裝置 使用時的噪音。 综上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式’自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 ，【圖式簡單說明】 201016117 圖1為習知技術散熱模組的流場示意圖。 • 圖2為本發明散熱裝置較佳實施例的立體分解圖。 ： 圖3為圖2組合後的流場示意圖。 圖4為扇框的另一實施例的立體示意圖。 【主要元件符號說明】 離心風扇 10 底板 11、41 侧壁 12、 42 葉輪 13 頂板 14 第一進風口 15 響第二進風口 16 第一出風口 17、91 第二出風口 18, 92 凸塊 19、49 第一鰭片組 20 第二縛片組 30 扇框 40> 90 第一侧面 44 侧棱 45 第二側面 46 第一散熱片組93 第二散熱片組 94 入風口 95 轉子 98 散熱模組 100 ❿ 11With the rapid development of the computer industry, the CPU pursues high speed, and the heat dissipation problem caused by high-performance and miniaturization is becoming more and more serious, which is more prominent in electronic devices such as notebook computers with small internal space. If the heat generated by the electronic components such as the CPU in the notebook cannot be dissipated in a timely and effective manner, the performance of the electronic components will be greatly affected, and the life of the electronic components will be reduced. Therefore, the electronic components must be dissipated. At present, in the computer, a heat dissipation module is often used to dissipate the heat generated by the electronic components. As shown in FIG. 1 , the conventional heat dissipation module 100 includes a first heat sink group 93 , a second heat sink group 94 , a fan frame 9 , and a rotor 98 . The rotor 98 is received in the fan frame 90 . An air inlet vent, a first air outlet 91 and a second air outlet 92 are formed on the fan frame 9. The first fin group and the second fin group 94 are respectively disposed at the first air outlet 91 and the second air outlet. When the rotor 98 rotates, the generated airflow is blown to the first and second fin groups 93. 94° is the flow field shown in FIG. 1 , the air flow is large on the right side of the first heat sink group 93, and the left side is small, and the air flow blown toward the second heat sink group 94 is also large on the lower side, small on the upper side, and extremely distributed in the air volume. The unevenness reduces the utilization rate of the heat sink and affects the heat dissipation performance of the heat dissipation module 100. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a centrifugal fan that can optimize the air volume ratio and effectively improve the heat dissipation device having the same. A centrifugal fan includes an impeller, a bottom plate and a side wall surrounding the bottom plate, and the first air outlet and the second air outlet are disposed on the side wall of the 201016117. The raw air flow is discharged to the first air outlet and the second air outlet. The first 屮 s " impeller production • between the two outlets is provided with a bump 'the bump along the centrifugal wind: the mouth and the inner fan of the inner fan extends, the bump changes out of the first - outlet vents to the air outlet Air flow and air distribution, will The flow is led out from the first air outlet j and the second air outlet. - The second heat discharge device includes a centrifugal fan and a first fin fin set. The centrifugal fan includes an impeller, a bottom plate and a second wall surrounding the bottom. 'The side wall is provided with adjacent first air outlets and second air outlets; - the Korean group and the second W component serve at the first air outlet and the mouth to generate airflow to the impeller There is a bump between the first air outlet and the second air outlet, which is: from the two fans: the portion extends toward the inside of the centrifugal fan, and the bump changes the flow: the air of the air outlet The flow and air distribution distribute the airflow from the first air outlet and the second air outlet. Compared with the ventilator, the bump of the heat sink blocks part of the turbulence flowing through the first residual A fin group flows out, increasing the flow rate of the flow, so that the wind of the first fin group is more evenly hooked, and the utilization rate of «(4) is increased. In addition, the airflow to the second patch group is convex white,! ^The middle section of the second fin set makes the second fin set more uniform in wind: the same as the utilization of the first fins, thereby improving the heat sink Thermal performance. _ And [Embodiment Referring to FIGS. 2 and 3, the heat dissipation means includes a centrifugal fan Pei 10, "said slice group and a second fin assembly 2〇 3〇. The centrifugal fan 1 includes a blade • 201016117 wheel 13, a top plate 14, a bottom plate 11 and a scroll side wall 12. The top plate 14 is opposite the top plate 14, and the side wall 12 is disposed between the top plate 14 and the bottom plate 11. The top plate • . 14 , the bottom plate 11 and the side wall 12 are enclosed to form a frame, and an accommodating space is formed in the fan frame, and the impeller 13 is received in the accommodating space. The top plate 14 is provided with a first air inlet 15 , and the bottom plate 11 is provided with a second air inlet 16 . The side wall 12 extends vertically upward from the periphery of the bottom plate 11 and surrounds the bottom plate 11 . The side wall 12 is provided with a first air outlet 17 and The first air outlet 17 is adjacent to a second air outlet 18. The first and second air outlets 17, 18 are all straight and linear, and are arranged perpendicular to each other. The first and second fin sets 20 and 30 are respectively formed by stacking a plurality of heat dissipation fins, and the overall shapes of the first and second fin sets 2, 30 are respectively opposite to the first air outlet 17 and the second air outlet 18, respectively. Consistent. The first fin set 20 and the second fin set 30 are respectively disposed at the first air outlet 17 and the second air outlet 18 . A projection 19 is protruded from the bottom plate 11 between the first and second air outlets 17, 18, and the projection 19 extends toward the inside of the fan frame along the outer portion of the fan frame of the centrifugal fan. The projection 19 is a triangular-shaped sheet-like body. The bottom edge of the projection 19 is flat on the bottom plate 11. The height of the projection 19 along the axial direction of the centrifugal fan 10 is greater than zero and not greater than the height of the side wall 12. The height of the projection 19 gradually decreases from the outside of the centrifugal fan 10 toward the inside of the centrifugal fan 1 to zero. The outermost end of the protrusion 19 does not exceed the outermost end of the centrifugal fan 1〇, and the distance between the innermost end of the protrusion 19 located inside the centrifugal fan 10 and the impeller 13 is not less than 1 mm, so that the impeller 13 is not affected. Normal operation. The bumps 19 may be integrally formed with the bottom plate η. Alternatively, they may be separately formed and placed on the bottom plate. When the heat sink is in operation, a heat pipe (not shown) rapidly conducts heat generated by the heat generating component to the first and second fin sets 2, 30. Centrifugal fan 1〇.201016117 = When the wheel 13 is running, the cold air muscle is sucked from the first air inlet 15 and the second air inlet 16, and the first air outlet 17 and the second air outlet 18 are blown to the first outlet respectively. The first fin group 2〇 and the second fin group 3〇 at the tuyere 17 and the second air outlet 18 are blown away from the high-temperature airflow between the fins. Because the direction of the flow direction between the airflow direction and the fins is substantially the same as that of the first spheroid group, the flow to the stagnation is stronger. Then, the airflow is rotated toward the middle and the left side of the first fin group 20 around the impeller 13, and the change in the airflow angle causes the airflow flowing out of the middle portion and the left side of the first Korean chip group 20 to be weak. However, when the airflow continues to advance, it encounters the blocking of the bump 19, because the height of the bump 19 decreases from the outside of the centrifugal fan 1向, so that part of the airflow passes over the bump 19 and continues to blow to the second fin. The sheet group is smashed and the other knives are blocked and turned to the left side of the first Korean group 20. As shown in FIG. 3, when the bumps 19 are added, the airflow to the first fin group 2〇 and the second tab group 3G changes, except that the air volume flowing on the right side thereof remains large, due to the bumps. 19 resists a part of the airflow so that the eight turns, and the left and middle sections of the first fin group 20 flow out, so that the air volume of the left and middle sections of the first Korean group 20 is significantly increased and the distribution is relatively uniform. In addition, the airflow flowing to the second Korean group 3〇 is partially occupied by the bumps (4) and changes due to the direction of the guiding airflow of the bumps 19, so that the strong wind which should originally flow through the lower side of the second rotor group 3 is Leading to the middle section of the second fin set 30 increases the wind receiving area of the second Korean film, and 30, thereby also making the air volume distribution more uniform, and improving the utilization rate of the second rotating piece. In addition, the bump 19 changes the air volume ratio flowing through the first Korean group 20 and the second fin group 30, and the air volume flowing through the first Korean group 20 is increased, and correspondingly flows through the second binding piece. The air volume of the group is relatively small, and it is possible to transmit the heat generated by the main heating element or the 7G piece with a large amount of heat to the first binding piece group according to the need, and the first 201016117 f piece group 20 is stronger. The heat dissipation capability quickly dissipates heat, and the secondary or the lower heat generating component is thermally connected to the second fin group 3 to optimize heat dissipation. The optimal heat dissipation effect is achieved as needed. FIG. 4 is not another embodiment of the fan frame. The fan frame 4 is similar to the fan frame in the above embodiment, and includes a bottom plate 41, a side wall 42, and a protrusion 49 disposed on the bottom plate 41. . A first air outlet ” and a second air outlet 18 ′ are formed on the side wall 42 . The protrusion 49 is disposed at an intersection of the first air outlet 17 and the second air outlet 18 , and the frame 4 〇 and the fan frame of the above embodiment The difference β is that the bump 49 is a block-shaped body having a triangular prism shape. The thickness of the bump 49 gradually decreases inward along the outer portion of the frame 40, and the thickness of the bump 49 in the height direction. The bump 49 includes a first side 44 facing the first air outlet 17 and a second side 46 facing the second air outlet 18. The first side 44 faces the first air outlet 17. A side surface 44 and the first side surface 46 are inclined with respect to the bottom plate 41. The two side surfaces 44, 46 intersect the one side edge 45 in the interior of the fan frame 40. The side edge 45 is inclined with respect to the bottom plate 'I. The air flow is blown toward the convex block. At 49 o'clock, the impact on the first side surface 44, because the first side surface 44 is inclined with respect to the bottom plate 41, the transition is relatively gentle, and the noise generated by the air current impinging on the first side surface 44 is relatively reduced, thereby reducing the use of the heat sink. In summary, the present invention has indeed met the requirements of the invention patent, and is proposed according to law. Patent application. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application is not limited thereto. Any equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention, All of them should be covered by the following patent application. [Simplified illustration of the drawings] 201016117 Fig. 1 is a schematic diagram of a flow field of a conventional heat dissipation module. Fig. 2 is an exploded perspective view of a preferred embodiment of the heat dissipation device of the present invention: Fig. 3 is a schematic view of the flow field after the combination of Fig. 2. Fig. 4 is a perspective view showing another embodiment of the fan frame. [Description of main components] Centrifugal fan 10 Base plate 11, 41 Side wall 12, 42 Impeller 13 Top plate 14 First Air inlet 15 ringing second air inlet 16 first air outlet 17, 91 second air outlet 18, 92 bump 19, 49 first fin set 20 second patch set 30 fan frame 40 > 90 first side 44 side Edge 45 second side 46 first heat sink group 93 second heat sink group 94 air inlet 95 rotor 98 heat dissipation module 100 ❿ 11