1269859 九、發明說明： 【發明所屬之技術領域】 種具較高散熱效率的散熱 本發明係關於一種散熱器，尤係關於_ 器。 【先前技術】1269859 IX. Description of the invention: [Technical field to which the invention pertains] Heat dissipation with higher heat dissipation efficiency The present invention relates to a heat sink, and more particularly to a heat exchanger. [Prior Art]
習知之散熱裝置-般包括-散熱器及一提供強制氣流的散敎風 扇。該散熱器設有複數平板狀的散熱鰭片，其中各相鄰散熱鰭片間形 成使該強制氣流經過喊流通道，該散熱裝置彻該氣流通道内的強 制氣流與散熱鰭片間的熱父換貫現對發熱電子元件的散熱。 ，在该散熱裝置的散熱過程巾，由於祕影響，該強織流在氣流 通迢内的流動為層流或紊流流動。通常紊流流動會增強散熱鰭片與強 制氣流間的熱交換。即使是紊流流動時，在散熱鰭片表面與強制氣流 之接觸部分有-層流底層，此層流底層厚度的增加會降低散熱韓片與 強制氣流_熱交換效率。故，如何破壞此層流底層的形成與發展是 提南散熱縛片與散熱風扇產生之強制氣流間的熱交換效率，從而提昇 整個散熱裝置散熱效率的關鍵問題之一。 【發明内容】 有鑑於此，下面以具體實施例說明一種具較高散熱效率的散熱器。 一種散熱器，包括複數散熱鰭片，各散熱鰭片包括一本體；U等 本體間形成使氣流經過的氣流通道，該本體上設有至少一向相鄰g熱 鰭片之本體凸伸的凸出部，該凸出部的凸出高度逐漸變化，以^玄= 出部上形成至少一導引氣流之流線型導引面。 〜 作為本發明之進一步改進，該散熱器還包括至少一與該等 鲈 片熱連接之熱管。 、^……9 由於該凸出部凸伸出散熱鰭片之本體，故，當氣流經過該凸出部 時在凸出部的影響下可產生渦流作用，該渦流作用可增加氣流的擾 動破壞政熱鰭片本體附近層流底層的增長和發展，有助於提高散熱 鰭片表面的熱交換係數，從而減小散熱鰭片處的熱交換熱阻，提 熱縛片表面的熱交換效果，提高整個散熱器的性能；該凸出部的設^ 6 1269859 亦可增加整個散齡的散熱_，綠 面可將部分氣流導引至熱管處，文…、政羊，引 散熱器散姐率昇產生有於熱讀熱_«，對整個 【實施方式】 下面芩照附圖結合實施例對本發明作進一步說明。 本發明所述之散魅10可與—散熱風扇配合使. f生之氣流沿-定方向吹向該散熱器10。 及 所=，、、= 熱器10包括-由複數相互平行的散鱗片12堆疊形成γt ^於顧片組_鮮14，該鮮14可與—發熱元件相接5、 發熱元件產生之熱量傳遞至該鰭片組。 、 該散熱鰭片12包括-矩縣體122，該本體122上、下兩 ^折形成有垂直於該本體122的翼片123，各散麵片12的翼片123 =與前:散_片12的本體122她靠，使各相鄰的二散_片12 曰 1存在-定的間距，從而在該等散熱鰭片12的本體i ，過的氣流通道。縣體122靠近上端驗謂設_收容絲 谷孔124，該收容孔124邊緣向本體122的一側凸伸形成埶 相接觸的接觸部125,該接觸部125可增大熱管14與散_片、&的 接觸面積，從而增加熱管14與散熱鰭片12間的傳熱量。該散敎 12之本體122上還設置-向一相鄰之散熱鰭片12的本體122凸伸^凸 ，部126，該凸出部126於該散熱鰭片12之本體122上的延伸方向與 氣流的行進方向間形成-鈍角，由該本體122之右下角延伸至 ^ ^體122之左上角的歸14處，可將靠近本體122下端的部分氣流 V至位於本體122上端的熱管14處，增加熱管14處的散熱效哕 凸出部126與散熱鰭丨12之本體122的接合部位為菱形，且該凸出^ 126的凸出高度自該凸出部126的甲部向該凸出部126與本體122掊 合部位逐漸減小，在該凸出部126上形成二相交於凸出部126中部的 流線型的導引面127,流線型的設計可降低氣流沿該等導引面127 ^熱 管14處運動或跨越該凸出部126前進時受到的阻力，更有利於二丨、雨 道内氣流的運動。 、〃机、 工作時，該熱管14由發熱元件處吸收熱量，將該發熱元件產生之 熱$傳遞至該鰭片組，然後藉由該散熱風扇產生之氣流與散熱鰭片Ρ 間的熱交換將該熱量散發出去。 9 7 1269859 该工作過程中，當散熱風扇產生之氣流到達該凸出部126時，沿 著该凸出部126的導引面127向前運動，將部分氣流導引至熱管14附 近，使吹向熱管14處的氣流流量較大，從而使該氣流由熱管14處帶 ，較多的熱量，增加熱管14處的散熱效率；由於該凸出部126凸伸出 散，气片12之本體122,故，當氣流經過該凸出部丨26時在凸出部126 a下了產生屑流作用，遠渴流作用可增加氣流的擾動，破壞散熱 鰭片12本體122附近層流底層的增長和發展，有助於提高散熱鰭片12 表面的熱交換係數，從而減小散熱鰭片12處的熱阻，提昇散熱鰭片12 表面的熱交換效果，提高整個散熱器1〇的性能；該凸出部抓 亦可增加整個散熱H Η)的散熱面積，提高該雜器丨㈣散熱^置 該鰭片組内亦可穿設多根熱管14，並設置延伸至該等埶管14處的 一個或多個凸出部126，如第三及第四圖所示即為該散熱鰭片12，上設 置多個凸出部126’的情況，該等凸出部126，於該散熱鰭片12，之本體 122上之延伸方向可相互平行或存在—定的夾角，且保證其巾 〒部丄26,由散熱鰭片I2,之本體m上遠離熱管Μ的一個邊角 與该邊角，對的另-邊角的位置延伸，將部分氣流導引至熱管Μ户， 以便於熱f Η處熱量的散發。當該等凸出部126，之延伸方= -定夾角時，沿該等凸出部126，流向收容於收容孔124内之 向不該等沿不同方向流向熱管14處的氣流相互作用处 :進-加熱管14處氣流的擾動，提高該散熱器ω，的散埶。 另外，該凸出部126與散熱鰭片12之本體122的接合 ，形等其他形狀，保證每個凸出部126的凸出高度由該^ %月 部向，出部126與散細片12之本體122的接合 们 設置多個凸出部126時，該等凸出部126與散熱·鰭片12 =3可為相同或不同形狀。本發明中，熱管14與散熱：ί2 3 、U式不限於穿設’該熱管14亦可搭設於該散妖 曰 的壁部，使該熱管14與散熱鰭片12熱連接。…、"9之本體122 【圖式簡單說明】 8 1269859 第一圖為該散熱器之立體圖； 第二圖為該散熱器中單個散熱鰭片的立體圖； 第三圖為該散熱器第二實施例的立體圖； 第四圖為該散熱器第三實施例中散熱鰭片的立體圖。 【主要元件符號說明】Conventional heat sinks typically include a heat sink and a diffuser fan that provides a forced air flow. The heat sink is provided with a plurality of flat fins, wherein adjacent air fins are formed to pass the forced airflow through the shouting channel, and the heat dissipating device passes through the hot air between the forced airflow and the heat dissipating fins in the airflow passage. The heat dissipation of the heat-generating electronic components is changed. In the heat-dissipating process towel of the heat dissipating device, the flow of the strong weaving flow in the airflow through the laminar flow or the turbulent flow due to the secret influence. Usually turbulent flow enhances heat exchange between the fins and the forced airflow. Even in the case of turbulent flow, there is a laminar flow underlayer in the contact portion between the surface of the fin and the forced airflow, and an increase in the thickness of the laminar underlayer reduces the heat transfer efficiency of the heat sink and the forced airflow. Therefore, how to destroy the formation and development of the laminar flow bottom layer is one of the key issues for improving the heat exchange efficiency between the heat dissipation block and the forced air flow generated by the cooling fan, thereby improving the heat dissipation efficiency of the entire heat dissipation device. SUMMARY OF THE INVENTION In view of the above, a heat sink with high heat dissipation efficiency will be described below by way of a specific embodiment. A heat sink includes a plurality of heat dissipating fins, each of the heat dissipating fins includes a body; and a body of U and the like forms an air flow passage through which the airflow passes, and the body is provided with a protrusion protruding from at least one body of the adjacent g hot fins The protruding height of the protruding portion is gradually changed to form at least one streamlined guiding surface for guiding the airflow on the output portion. ~ As a further improvement of the present invention, the heat sink further comprises at least one heat pipe thermally coupled to the dies. , ^...9 Since the protruding portion protrudes from the body of the heat dissipating fin, when the airflow passes through the protruding portion, an eddy current action can be generated under the influence of the protruding portion, and the eddy current action can increase the disturbance of the airflow. The growth and development of the laminar bottom layer near the body of the fins helps to improve the heat exchange coefficient of the fin surface, thereby reducing the heat exchange resistance at the fins and improving the heat exchange effect on the surface of the fins. Improve the performance of the entire radiator; the projection of the 6 6269859 can also increase the heat dissipation of the entire age _, the green surface can guide part of the airflow to the heat pipe, Wen... The liter is generated in the heat reading heat_«, the whole embodiment. The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings. The distraction 10 of the present invention can be combined with the heat dissipating fan to blow the airflow of the f to the heat sink 10 in a predetermined direction. And, =, = = heater 10 includes - stacked by a plurality of parallel scales 12 to form γt ^ in the film group _ fresh 14, the fresh 14 can be connected with the heating element 5, the heat transfer generated by the heating element To the fin group. The heat dissipating fin 12 includes a moment body 122. The upper and lower sides of the body 122 are formed with fins 123 perpendicular to the body 122, and the fins 123 of each flaking piece 12 are combined with the front: The body 122 of the 12 is biased so that the adjacent two scattered sheets 12 曰 1 are present at a predetermined spacing, thereby passing the air flow passages in the body i of the heat dissipating fins 12. The county body 122 is adjacent to the upper end of the device to receive the wire valley hole 124. The edge of the receiving hole 124 protrudes toward one side of the body 122 to form a contact portion 125 that is in contact with the body. The contact portion 125 can enlarge the heat pipe 14 and the loose film. The contact area of &, thereby increasing the amount of heat transfer between the heat pipe 14 and the fins 12. The body 122 of the heat sink 12 is further disposed to protrude from the body 122 of an adjacent heat dissipation fin 12, and the portion 126 extends in the body 122 of the heat dissipation fin 12 An obtuse angle is formed between the traveling directions of the airflow, and the lower right corner of the body 122 extends to the upper left corner of the body 122, and a portion of the airflow V near the lower end of the body 122 can be brought to the heat pipe 14 at the upper end of the body 122. Increasing the heat dissipation effect at the heat pipe 14 , the joint portion of the protrusion 126 and the body 122 of the heat dissipation fin 12 is a diamond shape, and the protrusion height of the protrusion 126 is from the nail portion of the protrusion portion 126 to the protrusion portion The 126 is gradually reduced in contact with the body 122, and a streamlined guiding surface 127 intersecting the middle of the protruding portion 126 is formed on the protruding portion 126, and the streamlined design can reduce the airflow along the guiding surface 127^the heat pipe The resistance encountered when moving at 14 or across the projection 126 is more conducive to the movement of the airflow in the second and the rain. When the machine is in operation, the heat pipe 14 absorbs heat from the heat generating component, transfers the heat generated by the heat generating component to the fin set, and then exchanges heat between the airflow generated by the heat radiating fan and the heat radiating fins. The heat is dissipated. 9 7 1269859 During the working process, when the airflow generated by the cooling fan reaches the protruding portion 126, the guiding surface 127 of the protruding portion 126 moves forward, and a part of the airflow is guided to the vicinity of the heat pipe 14 to make the air blow. The flow rate of the airflow to the heat pipe 14 is relatively large, so that the airflow is carried by the heat pipe 14, and more heat is added to increase the heat dissipation efficiency at the heat pipe 14. Since the protruding portion 126 is convexly protruded, the body 122 of the gas sheet 12 Therefore, when the airflow passes through the protruding portion 丨26, a flow of debris is generated in the protruding portion 126a, which can increase the disturbance of the airflow and destroy the growth of the laminar bottom layer near the body 122 of the heat dissipation fin 12. The development helps to increase the heat exchange coefficient of the surface of the heat dissipation fin 12, thereby reducing the thermal resistance at the heat dissipation fin 12, improving the heat exchange effect on the surface of the heat dissipation fin 12, and improving the performance of the entire heat sink 1; The upper part can also increase the heat dissipation area of the entire heat dissipation H Η), and improve the heat dissipation (four) heat dissipation. The plurality of heat pipes 14 can also be disposed in the fin group, and one of the heat pipes 14 is extended to the same. Or a plurality of protrusions 126, as shown in the third and fourth figures The heat dissipating fins 12 are provided with a plurality of protrusions 126 ′. The protrusions 126 extend parallel to the heat dissipation fins 12 and may have a certain angle or a certain angle. The cover portion 26 is formed by the heat sink fins I2, a corner of the body m away from the heat pipe 与 and the corners, and the other corners of the pair extend to guide the partial airflow to the heat pipe to the door. The heat is dissipated at the heat f Η. When the extensions 126 extend at a certain angle, the flow along the projections 126 flows toward the airflow that is accommodated in the receiving hole 124 and flows to the heat pipe 14 in different directions: The disturbance of the air flow at the inlet-heating tube 14 increases the enthalpy of the heat sink ω. In addition, the protrusions 126 are engaged with the body 122 of the heat dissipation fins 12, and the like, and other shapes are ensured, and the protrusion height of each of the protrusions 126 is ensured by the portion, the outlet portion 126 and the loose sheet 12 When the joints of the main body 122 are provided with a plurality of projections 126, the projections 126 and the heat dissipation fins 12 = 3 may be the same or different shapes. In the present invention, the heat pipe 14 and the heat dissipation: ί2 3 , the U type is not limited to the piercing. The heat pipe 14 may also be disposed on the wall portion of the sorrow, so that the heat pipe 14 is thermally connected to the heat dissipation fins 12. ..., "9 body 122 [Simple description] 8 1269859 The first picture is a perspective view of the heat sink; the second picture is a perspective view of a single heat sink fin in the heat sink; the third picture is the heat sink second A perspective view of an embodiment; a fourth view is a perspective view of a heat sink fin in the third embodiment of the heat sink. [Main component symbol description]
散熱器 10、10’ 执管 14 散熱鰭片 12 、 12， 本體 122 翼片 123 收容孔 124 接觸部 125 凸出部、 126、126, 導引面 127 9Heatsink 10, 10' Tube 14 Heat sink fins 12, 12, Body 122 Tab 123 Housing hole 124 Contact portion 125 Projection, 126, 126, Guide surface 127 9