200912183 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種發光二極體燈具，特別係指一種具有 散熱裝置之發光二極體燈具。 【先前技術】 發光二極體作為一種高效之發光源’已經被越來越多 地應用在各個領域當中。但是，發光二極體工作時會產生 大量之熱量，該等熱量如若得不到及時之散發，容^使發 光二極體產生過熱現象，進而導致其發光效率下降。 傳統之發光二極體燈具包括-板狀之散熱器及複數安 裝於散熱器-侧之發光二極體。該等發光二極體均句地排 列於複數直線上。當發光二極體被點亮時，其產生之熱量 經由散熱器散發至周圍之空氣當中。 ’’、、里 但是，由於發光二極體之發熱量較大，為了使絲量 能夠靖散發出去’散熱器之體積一般製造地比較龐大 2传：較大之散熱面積，從而導致該發光二極體燈具之 利’且’由於該等發光二極體位於散熱器之同 二光線只能籍由散熱器之該側向外輻射而 果不‘ ，不能同時照亮燈具之四周圍，照明效 【發明内容】 種散熱效率較高且照明效 有鑒於此，實有必要提供一 果較佳之發光二極體燈具。 200912183 一種發光二極體燈具，包括一第一散熱器、一第二散 熱器、複數熱管、及圍繞第一散熱器外壁貼置之複數發光 二極體模組，所述第一散熱器開設一貫穿之通口，所述第 二散熱器收容於第一散熱器之通口内且通過所述熱管與第 一散熱器連接。 與習知技術相比，本發明發光二極體燈具加設一第二 散熱器以輔助散熱，可在控制散熱器體積大小之同時獲得 一較高之散熱效率；且由於發光二極體模組圍繞散熱器外 壁設置，可將光線向燈具四周輻射，達到一較佳之照明效 果。 【實施方式】 如圖1所示，本發明之發光二極體燈具包括一第一散 熱器10、一設置於第一散熱器10内部之第二散熱器20、 複數連接第一散熱器10和第二散熱器20之熱管30、及圍 繞第一散熱器10設置之複數發光二極體模組40。 請參閱圖2,所述第一散熱器10和第二散熱器20均由 熱導性良好之金屬材料製成。該第一散熱器10包括一第一 導熱筒12。本發明之實施例中該第一導熱筒12為一中空之 正六稜柱體。所述第一導熱筒12具有六等大之矩形外壁 120，供發光二極體模組40貼置。該第一導熱筒12中部沿 第一散熱器10軸向開設一上下貫穿之圓形通口 14,進而形 成一圓筒形之内壁122。六平行之凹槽124均勻地開設於所 述内壁122上，其中每一凹槽122與相應外壁120之中部 8 200912183 相對設置，且沿第一散熱器10轴向延伸至第一導熱筒12 之上、下端口。 請一併參閱圖3，所述第二散熱器20位於第一散熱器 10之通口 14内，其包括一第二導熱筒22及從第二導熱筒 22外壁（圖未標）向外延伸而出之複數鰭片24。本發明實 施例中該第二導熱筒22為一中空之圓筒，其與第一導熱筒 12同軸，且其高度與第一導熱筒12之高度相等。該第二導 熱筒22中部沿第二散熱器20軸向開設一上下貫穿之圓形 開口 26，進而形成一圓筒形之内壁220。六平行之通槽222 均勻地開設於所述内壁220上，其中每一通槽222對應於 第一散熱器10之每一凹槽124,且沿第二散熱器20之軸向 延伸至第二導熱筒22之上、下端口，供熱管30嵌入。所 述鰭片24均呈矩形，其等間距地設置於第二導熱筒22四 周，進而形成複數供氣流通過之間隙（圖未標）。每一鰭 片24之高度小於第二導熱筒22之高度，其上邊緣與第二 導熱筒22之上端口‘齊平，其下邊緣未到達第二導熱筒22 之下端口。所述鰭片24之自由末端與第一導熱筒12之内 壁122存在一定之間隙，以使第二散熱器20完全收容於第 一散熱器10内。與第一導熱筒12凹槽124相對之每一鰭 片24之自由末端切去一部分，使該每一鰭片24之長度小 於處於其他位置之鰭片24之長度。該等末端切去一部分之 鰭片24與第一導熱筒12之凹槽124共同形成複數空間以 收容熱管30，從而防止熱管30與鰭片24產生干涉。依據 長度不同，可將鰭片24分為兩類：第一類鰭片24b中每一 9 200912183 •鰭片24b均較長，其自由末端至第二導熱筒22軸線之垂直 距離小於第一導熱筒12之内徑；第二類鰭片24a中每一鰭 片24a均較短，其自由末端至第二導熱筒22軸線之垂直距 離小於第一類鰭片24b中每一鰭片24b之自由末端至第二 導熱筒22軸線之垂直距離。 所述熱管30連接第一導熱筒12之内壁122和第二導 熱筒22之内壁220而將熱量由第一散熱器10傳輸至第二 散熱器20。每一熱管30大致呈“门”形，其包括一冷凝段 34、一平行于冷凝段34之蒸發段32、及垂直連接冷凝段 34和蒸發段32之絕熱段36。所述每一蒸發段32嵌入第一 導熱筒12之凹槽124内且與相對之第二類鰭片2朴間隔設 置；所述每一冷凝段32嵌入於第二導熱筒22之通槽222 内；相應之絕熱段36則位於第二類鰭片24a之正上方。 所述每一發光二極體模組40均包括一矩形之電路板 4 4及沿電路板4 4長度方向固定於電路板4 4同側之複數發 、光二極體42。三發羌二極體模組40貼置於第一導熱筒12 之每一外壁120上。該三發光二極體模組40均平行於第一 散熱器10之轴線，且相互等間距之分佈於每一外壁120 上，其中位於中間之一發光二極體模組40與第一導熱筒12 之凹槽124相互對應，另外兩侧之二發光二極體模組40則 位於該每一外壁120靠向兩侧邊之位置。各侧面之發光二 極體模組40均此佈置，從而其所產生之熱量能均勻地散佈 至整個第一散熱器10。 請參閱圖4，使用該發光二極體燈具時，發光二極體42 10 200912183 通電發光，其產生之熱量經由電路板44傳導至第一散熱器 10。由於加設了第二散熱器20，間接地增加了第一散熱器 10與空氣之接觸面積，從而可在不增大第一散熱器10體積 之基礎上，使第一散熱器10所吸收之熱量籍由第二散熱器 20迅速地散發出去，進而提高散熱效率。一部分熱量經由 第一散熱器10之外壁120向外輻射；另一部分熱量經由第一 散熱器10内壁122散發至第一散熱器10内部之空氣中。第一 散熱器10内部之空氣吸收熱量之後膨脹成密度較小之熱空 氣，其穿過第一散熱器10之通口 14之上部而離開第一散熱 器10 ;由於熱空氣離開導致第一散熱器10内部和外部間產 生氣壓差，從而使位於第一散熱器10外部之空氣穿過通口 14下部進入第一散熱器10内；之後這部分空氣吸收熱量再 度轉變成熱空氣，從而持續地實現空氣對流，不斷地移除 發光二極體燈具之熱量。且，由於發光二極體模組40圍繞 第一散熱器10外壁120設置，可將光線向燈具四周輻射，達 ，到一較佳之照明效果·。 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例， 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】 圖1係本發明實施例之立體組裝圖。 11 200912183 圖2係圖1之立體分解圖。 圖3係圖1之倒置圖。 圖4係圖1中散熱器之氣流走向圖。 【主要元件符號說明】 第一散熱器 10 第一導熱筒 12 外壁 120 内壁 122、220 凹槽 124 通口 14 第二散熱器 20 第二導熱筒 22 通槽 222 縛片 24 ' 24a ' 24b 開口 26 熱管 30 蒸發段 32 冷凝段 34 絕熱段 36 發光二極體模組 40 發光二極體 42 電路板 44 12200912183 IX. Description of the Invention: [Technical Field] The present invention relates to a light-emitting diode lamp, and more particularly to a light-emitting diode lamp having a heat sink. [Prior Art] Light-emitting diodes have been increasingly used in various fields as an efficient light source. However, when the light-emitting diode works, a large amount of heat is generated. If the heat is not released in time, the light-emitting diode causes overheating, which leads to a decrease in luminous efficiency. Conventional light-emitting diode lamps include a plate-shaped heat sink and a plurality of light-emitting diodes mounted on the heat sink-side. The light-emitting diodes are arranged uniformly on a plurality of straight lines. When the light-emitting diode is illuminated, the heat generated by it is dissipated through the heat sink to the surrounding air. '',, but, because of the large amount of heat generated by the light-emitting diode, in order to make the amount of silk can be released, the volume of the radiator is generally relatively large. 2: The larger heat-dissipating area, resulting in the light-emitting The advantages of the polar body lamps are 'and' because the same light rays of the light-emitting diodes located on the heat sink can only be radiated outward from the side of the heat sink, and cannot be illuminated at the same time. SUMMARY OF THE INVENTION A high efficiency of heat dissipation and illumination effects are necessary in view of the above, and it is necessary to provide a preferred light-emitting diode lamp. 200912183 A light-emitting diode lamp includes a first heat sink, a second heat sink, a plurality of heat pipes, and a plurality of light-emitting diode modules disposed around an outer wall of the first heat sink, wherein the first heat sink is opened The second heat sink is received in the through hole of the first heat sink and connected to the first heat sink through the heat pipe. Compared with the prior art, the light-emitting diode lamp of the present invention is provided with a second heat sink to assist heat dissipation, and can obtain a higher heat dissipation efficiency while controlling the volume of the heat sink; and because of the light-emitting diode module Set around the outer wall of the radiator, the light can be radiated around the lamp to achieve a better lighting effect. [Embodiment] As shown in FIG. 1 , the LED lamp of the present invention includes a first heat sink 10 , a second heat sink 20 disposed inside the first heat sink 10 , and a plurality of first heat sinks 10 and The heat pipe 30 of the second heat sink 20 and the plurality of light emitting diode modules 40 disposed around the first heat sink 10 . Referring to Fig. 2, the first heat sink 10 and the second heat sink 20 are each made of a metal material having good thermal conductivity. The first heat sink 10 includes a first heat conducting tube 12. In the embodiment of the invention, the first heat conducting tube 12 is a hollow regular hexagonal prism. The first heat conducting tube 12 has a rectangular outer wall 120 of six equal dimensions for mounting the light emitting diode module 40. A circular through-port 14 is formed in the middle of the first heat conducting tube 12 along the axial direction of the first heat sink 10 to form a cylindrical inner wall 122. Six parallel grooves 124 are uniformly formed on the inner wall 122, wherein each groove 122 is disposed opposite to the middle portion 8 200912183 of the corresponding outer wall 120 and extends axially along the first heat sink 10 to the first heat conducting tube 12 Upper and lower ports. As shown in FIG. 3 , the second heat sink 20 is located in the through hole 14 of the first heat sink 10 , and includes a second heat conducting tube 22 and extends outward from the outer wall of the second heat conducting tube 22 (not labeled). And the plurality of fins 24 are out. In the embodiment of the present invention, the second heat conducting tube 22 is a hollow cylinder which is coaxial with the first heat conducting tube 12 and has a height equal to the height of the first heat conducting tube 12. A circular opening 26 is formed in the middle of the second heat transfer tube 22 along the axial direction of the second heat sink 20 to form a cylindrical inner wall 220. Six parallel through slots 222 are evenly defined on the inner wall 220, wherein each of the through slots 222 corresponds to each recess 124 of the first heat sink 10 and extends along the axial direction of the second heat sink 20 to the second heat conduction. The upper and lower ports of the cylinder 22 are embedded in the heat pipe 30. The fins 24 are all rectangular, and are disposed at equal intervals on the second heat conducting tube 22 for four weeks, thereby forming a plurality of gaps (not shown) through which the airflow passes. The height of each of the fins 24 is smaller than the height of the second heat conducting tube 22, and the upper edge thereof is flush with the upper port of the second heat conducting tube 22, and the lower edge thereof does not reach the lower port of the second heat conducting tube 22. The free end of the fin 24 has a certain gap with the inner wall 122 of the first heat conducting tube 12, so that the second heat sink 20 is completely received in the first heat sink 10. A portion of the free end of each fin 24 opposite the recess 124 of the first thermally conductive tube 12 is cut away such that the length of each fin 24 is less than the length of the fins 24 at other locations. The fins 24 cut at the ends and the recesses 124 of the first heat conducting tube 12 form a plurality of spaces to accommodate the heat pipes 30, thereby preventing the heat pipes 30 from interfering with the fins 24. According to the length, the fins 24 can be divided into two types: each of the first type of fins 24b 9 200912183 • the fins 24b are longer, and the vertical distance from the free end to the axis of the second heat conducting tube 22 is smaller than the first heat conduction. The inner diameter of the barrel 12; each of the fins 24a of the second type of fins 24a is relatively short, and the vertical distance from the free end to the axis of the second heat conducting tube 22 is smaller than the freedom of each fin 24b of the first type of fins 24b. The vertical distance from the end to the axis of the second heat conducting tube 22. The heat pipe 30 connects the inner wall 122 of the first heat conducting cylinder 12 and the inner wall 220 of the second heat conducting cylinder 22 to transfer heat from the first heat sink 10 to the second heat sink 20. Each heat pipe 30 is generally "gate" shaped and includes a condensing section 34, an evaporation section 32 parallel to the condensing section 34, and an adiabatic section 36 that vertically connects the condensing section 34 and the evaporation section 32. Each of the evaporation sections 32 is embedded in the groove 124 of the first heat conduction tube 12 and spaced apart from the opposite second type of fins 2; the each condensation section 32 is embedded in the through groove 222 of the second heat conduction tube 22. The corresponding adiabatic section 36 is located directly above the second type of fin 24a. Each of the LED modules 40 includes a rectangular circuit board 44 and a plurality of optical and optical diodes 42 fixed to the same side of the circuit board 4 4 along the length of the circuit board 44. The triplet diode module 40 is placed on each of the outer walls 120 of the first heat conducting tube 12. The three LED modules 40 are parallel to the axis of the first heat sink 10 and are equally spaced from each other on each of the outer walls 120. The middle light emitting diode module 40 and the first heat conduction are located in the middle. The grooves 124 of the tube 12 correspond to each other, and the two light-emitting diode modules 40 on the two sides are located at the opposite sides of the outer wall 120. The light-emitting diode modules 40 of the respective sides are arranged such that the heat generated by the same can be evenly distributed throughout the first heat sink 10. Referring to FIG. 4, when the LED device is used, the LEDs 42 10 200912183 are energized to emit light, and the generated heat is conducted to the first heat sink 10 via the circuit board 44. Since the second heat sink 20 is added, the contact area of the first heat sink 10 and the air is indirectly increased, so that the first heat sink 10 can be absorbed without increasing the volume of the first heat sink 10. The heat is quickly dissipated by the second heat sink 20, thereby improving heat dissipation efficiency. A portion of the heat is radiated outward through the outer wall 120 of the first heat sink 10; another portion of the heat is dissipated into the air inside the first heat sink 10 via the inner wall 122 of the first heat sink 10. The air inside the first heat sink 10 absorbs heat and then expands into a small density of hot air, which passes through the upper portion of the port 14 of the first heat sink 10 and leaves the first heat sink 10; the first heat is dissipated due to the hot air leaving A difference in air pressure is generated between the inside and the outside of the device 10, so that the air located outside the first heat sink 10 passes through the lower portion of the port 14 into the first heat sink 10; after that, the portion of the air absorbs heat again into hot air, thereby continuously Achieve air convection and continuously remove heat from the LEDs. Moreover, since the LED module 40 is disposed around the outer wall 120 of the first heat sink 10, the light can be radiated to the periphery of the lamp to achieve a better illumination effect. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application in this case. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the present invention are intended to be included in the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective assembled view of an embodiment of the present invention. 11 200912183 Figure 2 is an exploded perspective view of Figure 1. Figure 3 is an inverted view of Figure 1. Figure 4 is a flow diagram of the air flow of the heat sink of Figure 1. [Main component symbol description] First heat sink 10 First heat conducting tube 12 Outer wall 120 Inner wall 122, 220 Groove 124 Port 14 Second heat sink 20 Second heat conducting tube 22 Passing groove 222 Baffle 24 ' 24a ' 24b Opening 26 Heat pipe 30 Evaporation section 32 Condensation section 34 Adiabatic section 36 Light-emitting diode module 40 Light-emitting diode 42 Circuit board 44 12