1289656 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種散熱器，尤係關於一種用於對電子元件散熱的 散熱器。 【先前技術】 習知散熱裝置一般包括一散熱器及一提供強制氣流之散熱風扇。 該散熱器設有複數平板狀之散熱鰭片，其中各相鄰散熱鰭片間形成使 該強制氣流經過之氣流通道，該散熱裝置利用該氣流通道内之強制氣 流與散熱鰭片間之熱交換實現對發熱電子元件之散熱。 在該散熱裝置之散熱過程中，由於粘性作用之影響，該強制氣流 在氣流通道内之流動爲層流或紊流流動。通常紊流流動會增強散熱鰭 片與強制氣流間之熱交換。即使係奮流流動時，在散熱鰭片表面與強 制氣流之接觸部分有一層流底層，此層流底層厚度之增加會降低散熱 鰭片與強制氣流間之熱交換效率。因此，如何破壞此層流底層之形成 與發展係提南散熱籍片與散熱風扇産生之強制氣流間之熱交換效率， 從而提升整個散熱裝置散熱效率之關鍵問題之一 【發明内容】 有鑒於此’下面以具體實施例說明一種具較高散熱效率之散熱器。 一種散熱器，包括複數相互堆疊之散熱鰭片，各散熱鰭片包括一 平板狀本體’該本體上設有向一側凸伸之複數個第一凸部及向另一側 凸伸之複數個第二凸部，該等第一凸部及第二凸部交錯設置，在相鄰 散熱鰭片間形成波浪形之氣流通道。 該等第一及第二凸部凸伸出散熱鰭片之本體，可使流經該氣流通 道之氣流産生奮流，以增加氣流通道内氣流之擾動，破壞散熱鰭片本 體附近層流底層之增長和發展，有助於提高散熱鰭片表面之熱交換係 數，從而減小散熱鰭片處之熱交換熱阻，提升散熱鰭片表面之熱交換 效果，提高整個散熱器之性能；該等第一及第二凸部之設置還可增加 6 1289656 整個散熱器之散熱面積，提高該散熱器之散熱效率。 【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。 本實施例所述之散熱器10可與一散熱風扇配合使用，使該散熱風 扇産生之氣流沿一定方向吹向該散熱器10。 如第一及第二圖所示，該散熱器10包括複數相互平行之散熱鰭片 12及一穿δ又於該等散熱縛片12内並與一發熱元件熱連接之熱管μ。 當該散熱器10工作時，該熱管14可將發熱元件産生之熱量傳遞至散 熱鰭片12,利用散熱鰭片12與通過之氣流間之熱交換將熱量散發出去。1289656 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a heat sink, and more particularly to a heat sink for dissipating heat from electronic components. [Prior Art] Conventional heat sinks generally include a heat sink and a heat sink fan that provides a forced air flow. The heat sink is provided with a plurality of flat fins, wherein adjacent air fins form an air flow passage for the forced airflow, and the heat dissipating device utilizes heat exchange between the forced airflow and the heat radiating fins in the airflow passage. Achieve heat dissipation from heat-generating electronic components. During the heat dissipation of the heat sink, the flow of the forced air flow in the air flow passage is laminar or turbulent due to the influence of the viscous action. Usually turbulent flow enhances the heat exchange between the fins and the forced airflow. Even if the flow is flowing, there is a layer of flow under the contact portion between the surface of the heat sink fin and the forced air flow, and the increase in the thickness of the layer bottom layer reduces the heat exchange efficiency between the heat sink fin and the forced air flow. Therefore, how to destroy the formation and development of the underlying layer of the laminar flow is one of the key problems in improving the heat exchange efficiency between the heat-dissipating heat sink and the forced airflow generated by the cooling fan, thereby improving the heat dissipation efficiency of the entire heat sink device [invention] A heat sink with high heat dissipation efficiency will be described below with specific embodiments. A heat sink includes a plurality of heat dissipating fins stacked on each other, each of the heat dissipating fins including a flat body having a plurality of first convex portions protruding toward one side and a plurality of second portions protruding toward the other side The convex portion, the first convex portion and the second convex portion are alternately arranged to form a wave-shaped air flow passage between the adjacent heat dissipation fins. The first and second protrusions protrude from the body of the heat dissipation fin, so that the airflow flowing through the airflow passage can generate a flow to increase the disturbance of the airflow in the airflow passage, and damage the laminar bottom layer near the heat dissipation fin body. Growth and development help to improve the heat exchange coefficient of the fin surface, thereby reducing the heat exchange heat resistance at the fins, improving the heat exchange effect of the fin surface, and improving the performance of the entire heat sink; The arrangement of the first and second convex portions can also increase the heat dissipation area of the entire heat sink of 6 1289656, thereby improving the heat dissipation efficiency of the heat sink. [Embodiment] Hereinafter, the present invention will be further described with reference to the accompanying drawings. The heat sink 10 of this embodiment can be used in conjunction with a heat dissipating fan to blow the airflow generated by the heat radiating fan toward the heat sink 10 in a certain direction. As shown in the first and second figures, the heat sink 10 includes a plurality of heat-dissipating fins 12 which are parallel to each other and a heat pipe μ which is δ and is thermally connected to the heat-dissipating components 12 and is connected to a heat-generating component. When the heat sink 10 is in operation, the heat pipe 14 can transfer heat generated by the heat generating component to the heat radiating fins 12, and heat is dissipated by heat exchange between the heat radiating fins 12 and the passing airflow.
該散熱鰭片12包括一平板狀之矩形本體12〇，該本體12〇上設有 分別由本體120上、下兩端垂直向前延伸之兩翼片ι21，各散熱縛片 12之翼片121分別與前一散熱鰭片12之本體120相抵靠，在各相鄰之 二散熱鰭片12間形成一定之間隔，使散熱風扇産生之氣流可經由該等 間隔、/m»過放熱縛片12’與散熱縛片12交換熱量。該本體12〇上開言免一 收容熱管14之收容孔122，該收容孔122邊緣向本體120之一側凸伸 形成有與熱管14相接觸之接觸部123，該接觸部123可增大熱管14與 散熱鰭片12間之接觸面積，使熱管14能更好地將發熱元件產生之熱 量傳遞給散熱鰭片12，提高散熱器1〇之散熱效率。 該散熱鰭片12之本體120上還設有向本體120之一側凸伸之四個 第一凸部124、向本體120另一側凸伸之兩個第二凸部125及一個第三 凸部126 〇 請一併參閱第三至第五圖，該等第一、第二凸部124、125與散熱 鰭片12本體120之接合部位均爲直角梯形，該第三凸部126與散熱鰭 片12本體120之接合部位爲矩形，該等第一、第二凸部124、125及 該第三凸部126凸出本體120之高度在本體120之長度方向上分別由 該接合部位之兩端向接合部位中部逐漸增加\/使該等第一、第二凸部 124、125及該第三凸部126沿本體120長度方向之橫截面均爲弓$， 7 1289656 該本體之120長度方向與氣流之行進方向平行，使該等第一、第二凸 部124、125及該第三凸部126在朝向氣流之一側形成流線形之導引面 127，從而使氣流沿所述導引面127前進時受到較小之阻力，更有利於 氣流之流動。 該四個第一凸部124分別位於本體120之四角，均布于熱管14兩 側。該等第二凸部125與第一凸部124沿本體120之長度方向交錯設 - 置，兩相鄰之第一凸部124與第二凸部125沿本邊120之長度方向間 隔一定距離。該等第一凸部124及第二凸部125分別通過衝模在本體 120上衝壓形成，從而在本體12〇上形成分別對應於該等第一凸部124 I 及第二凸部125之複數第一凹陷部124a及第二凹陷部125a，前一散熱 鰭片12之第一凹陷部124a及第二凸部125分別與後一散熱鰭片12之 第一凸部124及第二凹陷部125a相對應，在各相鄰之散熱鰭片12間形 成沿本體120長度方向延伸之波浪形第一氣流通道128。當散熱風扇産 生之瘋^流流經第一氣流通道128時，該等第一及第二凸部124、125可 改變前進氣流之行進方向，增加第一氣流通道128内氣體之紊流，破 壞散熱鰭片12本體120附近層流底層之增長和發展，有助於提高散熱 鰭片12表面與氣流間之熱交換效率，減小散熱鰭片12處之熱阻，提 • 升散熱鰭片12表面之熱交換效果，提高散熱器10之散熱效率。^ 該等第一凸部124及第二凸部125靠近接觸部123之邊緣在本體 120之寬度方向上分別與接觸部123間隔一定距離，該距離沿氣流之行 進方向逐漸減小，從而在熱管14兩側形成二狹長且寬度逐漸減小之第 二氣流JI填129，像熱管14兩側之風壓逐漸增加。該第三凸部126位 ·—•一一 --..--- 一..— -‘一.、，.·. 於第二氣流通道129内，衝設於沿本體120之寬度方向相鄰之兩個第 一凸部124之間，靠近熱管14背向氣流之一側。散熱風扇産生之氣流 進入第一氣流通道129後’順暢地經過熱管14兩側到達第三凸部126 處，在第三凸部126之影響下産生紊流，進一步提高散熱器1〇之散熱 效率。 8 1289656 、 本實施例所示散熱器10中，凸伸出散熱鰭片12本體12〇之第一、 第二及第二凸部124、125、126可增加流經散熱縛片12間氣流之蒼流， 提高散熱器1〇之散熱性能；該第一、第二及第三凸部124、125、126 之設置還可增加整個散熱器10之散熱面積，提高該散熱器10之散熱 - 效率；該等第一及第二凸部124、125之設置可使進入第一氣流通道128 • 内之氣流量減少，以增加第二氣流通道129内之氣流量及氣壓，另外， " 該等第一及第二凸部124、125之形狀設計可進一步增加第二氣流通道 129内氣流之壓力及流速，進而使熱管處之熱量在該氣流之作用下快速 散發，提高散熱器10之散熱效果。 瞻本實施例中，第一、第二及第三凸部124、125、126與散熱鰭片 12本體120之接合部位可爲橢圓形等其他形狀，使每個第一、第二及 第三凸部124、125、126之凸出本體120之高度沿本體120之長度方 向由該接合部位之兩端向接合部位中部逐漸增加。可以理解地，該等 、 第一、第二凸部124、125及該第三凸部126與散熱鰭片12本體120 之接合部位可爲相同或不同形狀。 本實施例中，熱管14與散熱鰭片12之結合方式不限於穿設，該 熱管14也可沿散熱鰭片12之排妁方向搭設於該等散熱鰭片12之壁 _ 部’使熱管14與散熱鰭片12熱連接。 【圖式簡單說明】 第一圖爲該散熱器之部分分解示意圖； 第二圖爲第一圖沿另一方向之立體圖； 第三圖爲該散熱器之右視圖； 第四圖爲第一圖沿IV-IV線之剖視圖； 第五圖爲該散熱器之主視圖。 【主要元件符號說明】 散熱器 10 散熱鰭片 12 本體 120 翼片 121 9 • 1289656 收容孔 122 接觸部 123 第一凸部 124 第一凹陷部 124a 第二凸部 125 第二凹陷部 125a 第三凸部 126 導引面 127 第一氣流通道 128 第二氣流通道 129 熱管 14The heat dissipating fin 12 includes a flat rectangular body 12〇. The body 12 is provided with two flaps ι21 extending perpendicularly forwardly from the upper and lower ends of the body 120, and the fins 121 of the heat dissipating clips 12 are respectively respectively Abutting against the body 120 of the previous heat dissipation fin 12, a certain interval is formed between the adjacent two heat dissipation fins 12, so that the airflow generated by the heat dissipation fan can pass through the spacers, the /m»overheat release tab 12' Exchange heat with the heat dissipation tab 12. The accommodating hole 122 of the accommodating hole 122 is disposed at a side of the body 120 to form a contact portion 123 contacting the heat pipe 14. The contact portion 123 can increase the heat pipe. The contact area between the heat sink 14 and the heat sink fins 12 allows the heat pipe 14 to better transfer the heat generated by the heat generating component to the heat sink fins 12, thereby improving the heat dissipation efficiency of the heat sink 1. The body 120 of the heat dissipation fin 12 further includes four first protrusions 124 protruding toward one side of the body 120, two second protrusions 125 protruding toward the other side of the body 120, and a third protrusion 126. Please refer to the third to fifth figures. The joints of the first and second convex portions 124 and 125 and the main body 120 of the heat dissipation fin 12 are both right-angled trapezoids, and the third convex portion 126 and the heat dissipation fins 12 are provided. The joint portion of the main body 120 is rectangular, and the heights of the first and second convex portions 124 and 125 and the third convex portion 126 protruding from the main body 120 are respectively joined by the two ends of the joint portion in the longitudinal direction of the body 120. The middle portion of the portion is gradually increased.//The cross-sections of the first and second convex portions 124, 125 and the third convex portion 126 along the length direction of the body 120 are both bows $, 7 1289656 The traveling directions are parallel, so that the first and second convex portions 124, 125 and the third convex portion 126 form a streamlined guiding surface 127 toward one side of the airflow, thereby advancing the airflow along the guiding surface 127. When it is less resistant, it is more conducive to the flow of air. The four first protrusions 124 are respectively located at the four corners of the body 120 and are evenly distributed on both sides of the heat pipe 14. The second convex portions 125 and the first convex portions 124 are alternately arranged along the longitudinal direction of the body 120, and the adjacent first convex portions 124 and the second convex portions 125 are spaced apart by a certain distance along the longitudinal direction of the side 120. The first convex portion 124 and the second convex portion 125 are respectively stamped on the body 120 by a die, so as to form a plurality of the first convex portion 124 I and the second convex portion 125 respectively on the body 12 〇. a recessed portion 124a and a second recessed portion 125a, the first recessed portion 124a and the second recessed portion 125 of the first heat sink fin 12 are respectively opposite to the first convex portion 124 and the second recessed portion 125a of the rear heat dissipation fin 12 Correspondingly, a wave-shaped first air flow passage 128 extending along the longitudinal direction of the body 120 is formed between each adjacent heat dissipation fin 12 . When the madness generated by the cooling fan flows through the first airflow passage 128, the first and second convex portions 124, 125 can change the traveling direction of the forward airflow, increase the turbulence of the gas in the first airflow passage 128, and destroy The growth and development of the laminar bottom layer near the body 120 of the heat dissipation fin 12 helps to improve the heat exchange efficiency between the surface of the heat dissipation fin 12 and the airflow, and reduces the thermal resistance of the heat dissipation fin 12, and raises the heat dissipation fin 12 The heat exchange effect of the surface improves the heat dissipation efficiency of the heat sink 10. The first convex portion 124 and the second convex portion 125 are spaced apart from the contact portion 123 by a distance from the edge of the contact portion 123 in the width direction of the body 120, and the distance gradually decreases along the traveling direction of the air flow, thereby being in the heat pipe. A second airflow JI having two narrow lengths and gradually decreasing width is formed on both sides of the 14th, and the wind pressure on both sides of the heat pipe 14 is gradually increased. The third convex portion 126---one-one--..--- one..--'-..,.. in the second air flow channel 129, is flushed along the width direction of the body 120 Between the two adjacent first convex portions 124, near the side of the heat pipe 14 facing away from the air flow. After the airflow generated by the cooling fan enters the first airflow passage 129, it smoothly passes through the two sides of the heat pipe 14 to reach the third convex portion 126, and generates turbulence under the influence of the third convex portion 126, thereby further improving the heat dissipation efficiency of the heat sink 1 . 8 1289656 , in the heat sink 10 shown in this embodiment, the first, second and second convex portions 124, 125, 126 protruding from the main body 12 of the heat dissipation fin 12 can increase the airflow between the heat dissipation tabs 12 The convection improves the heat dissipation performance of the heat sink; the arrangement of the first, second and third convex portions 124, 125, 126 can also increase the heat dissipation area of the entire heat sink 10, thereby improving the heat dissipation-efficiency of the heat sink 10. The first and second protrusions 124, 125 are arranged to reduce the flow of air into the first air flow passage 128 to increase the air flow and air pressure in the second air flow passage 129, in addition, " The shape of the first and second protrusions 124, 125 can further increase the pressure and flow rate of the airflow in the second airflow passage 129, so that the heat at the heat pipe is quickly dissipated under the action of the airflow, thereby improving the heat dissipation effect of the heat sink 10. . In this embodiment, the joint portions of the first, second, and third convex portions 124, 125, and 126 and the heat sink fin 12 body 120 may have other shapes such as an elliptical shape, so that each of the first, second, and third portions The height of the convex body 120 of the convex portions 124, 125, 126 gradually increases from the both ends of the joint portion toward the middle portion of the joint portion along the longitudinal direction of the body 120. It can be understood that the joint portions of the first and second convex portions 124, 125 and the third convex portion 126 and the heat sink fin 12 body 120 may be the same or different shapes. In this embodiment, the combination of the heat pipe 14 and the heat dissipation fins 12 is not limited to the through hole. The heat pipe 14 can also be disposed on the wall _ portion of the heat dissipation fins 12 along the direction of the heat dissipation fins 12 to make the heat pipe 14 It is thermally connected to the heat dissipation fins 12. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a partial exploded view of the heat sink; the second figure is a perspective view of the first figure in another direction; the third figure is the right side view of the heat sink; the fourth figure is the first figure A cross-sectional view taken along line IV-IV; the fifth view is a front view of the heat sink. [Description of main component symbols] Heat sink 10 Heat sink fin 12 Body 120 Wing 121 9 • 1289656 Housing hole 122 Contact portion 123 First protrusion 124 First recess 124a Second protrusion 125 Second recess 125a Third convex Portion 126 guiding surface 127 first air flow passage 128 second air flow passage 129 heat pipe 14