200912188 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 大里之熱里，該專熱量如若得不到及時之散發，容易使發 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一板狀之散熱器及複數安 裝於散熱器一側之發光二極體。該等發光二極體均勻地排 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。 ”'、 但是，由於該種燈具只能單純地依 一 · '〜 I V u与戸& ，行，動式散熱，散熱效率有限。如若發光二極體佈置 j在木’熱里將無法得到及時散發’致使發光二極體 ^產生過熱現象，影響發光效率；且，由於該等發光二 二：散熱體之同側’其所發出之光線 周圍，照明效果不ί度有限，不能同時照亮燈具之1 【發明内容】 有鑒於此，實有必要提供一 果較佳之發光二極體燈具。 種散熱效率較高且照 明效 200912188 一種發光二極體燈具，包括一散熱器、複數圍繞散熱 器外壁貼置之發光二極體模組、及一固定於散熱器頂部之 風扇，該散熱器包括一具有一上下貫穿通口之導熱筒，複 數鰭片由導熱筒通口之内壁面延伸而出，該風扇位於該通 口上方，且其產生之氣流經過該通口内之鰭片而排出。 與習知技術相比，本發明發光二極體燈具具有一風扇 安裝於散熱器上，可籍由風扇所產生之高速氣流對燈具進 行主動式散熱，使燈具之熱量得到及時地散發，防止發光 二極體過熱；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和2所示，本發明之發光二極體燈具包括一散 熱器30、複數圍繞散熱器30外侧貼設之發光二極體模組 20、一安裝於散熱器30下部之燈罩10、及固定於散熱器 30上部之一燈蓋40及一風扇50，所述燈蓋40和燈罩10 共同將散熱器30收容於其内部。 請一併參閱圖4，上述散熱器30由熱導性良好之金屬 材料所製成，其包括一導熱筒。本發明實施例中之導熱筒 為一中空之正四稜柱體32。該棱柱體32具有四等大之矩形 外壁面320及與該等外壁面320相對應之四矩形内壁面（圖 未標），其中每二相鄰之内壁面相互垂直且平行於相應之外 壁面320。所述四内壁面共同圍設出一橫截面呈正方形、且 沿散熱器30轴向貫穿棱柱體32之上、下表面之通口（圖 200912188 未標），供氣流穿過。相鄰内壁面之連接部似之 圖未標)，供螺絲（圖未示）穿設而將風扇二 #疋屮 30上。複數鰭片340分別自四内壁面向内延 伸而出，且終止於稜柱體32兩兩對角方向並形成二交又之 通路322,由此，該二通路322將該等鰭片剔 四鰭片組34，每一銼η細uJ 造。每-鰭片片：等腰直角三角形構 之，、、、曰片340相互等間隔設置且均呈矩 柱體32之下表面沿散熱器3〇軸向延伸至稜柱 表面，從而使每一鰭片340與稜柱體32等高。 將每-鰭片340之自由末端至與該等鰭片34〇接觸之内壁 面之距料義為每-鰭片34G之長度，如此位於同一内= 面上U 340之長度自該内壁面兩側向中間逐漸增大。 所述發光二極體模組2〇分別固定於稜柱體32之四外 壁面320上。每一發光二極體模組2〇包括一矩形之電路板 24及沿電路板24長度方向固定於電路板24 —側之複數發 光一極體22。稜柱體32之每一外壁面32〇上沿散熱器训 轴向固定有三發光二極體模組2()，其中每—發光二極°體模 組20之迅路板24之相對一側與該外壁面32〇相接觸，從 而將發光—極體22所產生之熱量自電路板24之一側傳導 至散熱器30。 所述燈蓋40和燈罩1〇分別固定於棱柱體32之頂部和 底部。所述燈罩10由透明材質所製成，所述燈蓋4〇内壁 面塗有一層反光物質，用於將發光二極體模組2〇所發出之 光線會聚至某一區域，使該發光二極體燈具獲得一較佳之 200912188 .照明效果。所述燈蓋40開設一方形開口 42，所述燈罩10 亦開設一與燈蓋40開口 42相對應之方形開口 12。該二開 口 12、42均與稜柱體32之通口相連通，且該二開口 12、 42之面積與稜柱體32之通口之橫截面積大致相等，以最大 限度地增大氣流通道。 請一併參閱圖3，所述風扇50呈矩形，其橫截面積略 小於燈蓋40開口 42之面積，從而使風扇50安裝于燈蓋40 之開口 42處，即固定於散熱器30之鰭片340之頂部。該 風扇50之四角處具有與散熱器30固定柱324之螺孔相對 應之四穿孔（圖未標），四螺絲分別穿過風扇50之穿孔而 螺鎖於散熱器30之螺孔内，進而將風扇50牢固地固定於 散熱器30之通口上方。此時風扇50之氣流出口朝向散熱 器30内部，以使風扇50所產生之氣流穿過散熱器30之通 D ° 使用該發光二極體燈具時，發光二極體22通電發光， 其產生之熱量籍由電路板24傳導至散熱器30。由於散熱器 30之頂部加設了 一風扇50，可籍由風扇50所產生之氣流對 散熱器30進行主動式散熱，提高該發光二極體燈具之散熱 效率。熱量經由稜柱體32之内壁面傳輸至鰭片340上。由於 風扇50扇葉（圖未標）之旋轉，空氣被擾動而產生氣流。 該氣流自散熱器30頂部流入稜柱體32，再穿過鰭片340間之 間隙，最後從散熱器30底部排出稜柱體32，從而將熱量帶 出至散熱器30外部。由於風扇50扇葉之旋轉所產生之氣流 流速較高，可在短時間内帶走大部分之熱量，從而避免因 10 200912188 等發先 综上所述，本發明確已符合發明專利之要件，遂依法 ^出專射請。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Μ專利。舉凡熟悉本宰技藏 u士援依本發明之精神所作之等效修倚或變化，皆應'二 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。 圖2係圖1之立體分解圖。 圖3係圖2中散熱裔 '發光二極體模組、及風扇之組裝 圖0 圖4係圖2中散熱器之橫向截面圖。 【主要元件符號說明】 燈罩 10 發光二 極體模組20 電路板 24 稜柱體 32 通路 322 轉片組 34 燈蓋 40 開口 U、42 發光二極體 22 散熱器 30 外壁面 320 連接部 324 鰭片 340 風扇 50 η200912188 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] As a highly efficient light source, light-emitting diodes have been increasingly used in various fields. However, when the light-emitting diode works, it generates heat in the heat of the earth. If the heat is not released in time, it is easy to cause the light-emitting diode to overheat, which leads to a decrease in luminous efficiency. A conventional light-emitting diode lamp includes a plate-shaped heat sink and a plurality of light-emitting diodes mounted on one side of the heat sink. The light emitting diodes are evenly arranged 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. "', However, because this kind of luminaire can only be based on one'~ IV u and 戸&, line, dynamic heat dissipation, heat dissipation efficiency is limited. If the light-emitting diode arrangement j is in the wood 'heat will not be available Timely emission 'causes the light-emitting diodes to generate overheating, affecting the luminous efficiency; and, because of the light-emitting two-two: the same side of the heat-dissipating body', the illumination effect is limited, and cannot be illuminated at the same time. In the light of this, it is necessary to provide a better light-emitting diode lamp. The heat dissipation efficiency is high and the lighting effect is 200912188. A light-emitting diode lamp includes a heat sink and a plurality of heat sinks. a light-emitting diode module disposed on the outer wall, and a fan fixed on the top of the heat sink, the heat sink comprising a heat-conducting tube having a top-and-bottom through-port, the plurality of fins extending from the inner wall surface of the heat-conducting tube opening The fan is located above the port, and the generated airflow is discharged through the fins in the port. Compared with the prior art, the LED lamp of the present invention has a fan mounted on the fan. On the heat device, the luminaire can be actively dissipated by the high-speed airflow generated by the fan, so that the heat of the luminaire can be dissipated in time to prevent the illuminating diode from overheating; and, since the illuminating diode module is disposed around the outer wall of the radiator The light can be radiated to the periphery of the lamp to achieve a better illumination effect. [Embodiment] As shown in FIGS. 1 and 2, the LED lamp of the present invention includes a heat sink 30, and a plurality of stickers are disposed around the outside of the heat sink 30. The light-emitting diode module 20, a lamp cover 10 mounted on the lower portion of the heat sink 30, and a lamp cover 40 and a fan 50 fixed to the upper portion of the heat sink 30, the lamp cover 40 and the lamp cover 10 together to heat the heat sink 30 The heat sink 30 is made of a metal material having good thermal conductivity and includes a heat conducting tube. The heat conducting tube in the embodiment of the present invention is a hollow square prism 32. The prism body 32 has a rectangular outer wall surface 320 of four equal dimensions and four rectangular inner wall surfaces (not labeled) corresponding to the outer wall surfaces 320, wherein each two adjacent inner wall surfaces are perpendicular to each other and parallel to the corresponding outer wall. 320. The four inner wall surfaces collectively define a port having a square cross section and extending through the upper surface of the prism body 32 in the axial direction of the heat sink 30 (not shown in FIG. 12112188) for airflow. The connecting portion of the inner wall surface is similar to the drawing), and the screw (not shown) is passed through to the fan 2#30. The plurality of fins 340 extend from the inner wall of the inner wall respectively, and terminate in the prism body. 32 in two diagonal directions and forming a two-way path 322, whereby the two paths 322 are made of four fins 34, each of which is made of fine uJ. Each-fin sheet: isosceles The right-angled triangles are arranged at equal intervals from each other, and both of the lower surfaces of the rectangular cylinder 32 extend axially along the heat sink 3〇 to the prism surface, so that each fin 340 is equal to the prism 32. . The distance from the free end of each fin 340 to the inner wall surface in contact with the fins 34 is the length of each fin 34G, so that the length of the U 340 on the same inner = surface is from the inner wall surface The lateral middle gradually increases. The LED modules 2 are respectively fixed on the four outer wall surfaces 320 of the prism body 32. Each of the LED modules 2 includes a rectangular circuit board 24 and a plurality of light-emitting diodes 22 fixed to the side of the circuit board 24 along the length of the circuit board 24. Each of the outer wall surfaces 32 of the prism body 32 is fixed with a three-light diode module 2 () along the axial direction of the heat sink, wherein the opposite side of the X-channel module 24 of each of the light-emitting diode modules 20 is The outer wall surface 32 is in contact with each other to conduct heat generated by the light-emitting body 22 from one side of the circuit board 24 to the heat sink 30. The lamp cover 40 and the lamp cover 1 are respectively fixed to the top and the bottom of the prism body 32. The lampshade 10 is made of a transparent material, and the inner surface of the lamp cover 4 is coated with a reflective material for concentrating the light emitted by the LED module 2 to a certain area, so that the light-emitting diode 2 The polar lighting achieved a better 200912188. The lamp cover 40 defines a square opening 42. The lamp cover 10 also defines a square opening 12 corresponding to the opening 42 of the lamp cover 40. The two openings 12, 42 are all in communication with the ports of the prisms 32, and the areas of the two openings 12, 42 are substantially equal to the cross-sectional areas of the ports of the prisms 32 to maximize the air flow passage. Referring to FIG. 3 together, the fan 50 has a rectangular shape with a cross-sectional area slightly smaller than the area of the opening 42 of the lamp cover 40, so that the fan 50 is mounted at the opening 42 of the lamp cover 40, that is, the fin fixed to the heat sink 30. The top of the piece 340. The four corners of the fan 50 have four through holes (not shown) corresponding to the screw holes of the fixing post 324 of the heat sink 30, and the four screws are respectively screwed into the screw holes of the heat sink 30 through the through holes of the fan 50, thereby further The fan 50 is firmly fixed above the opening of the heat sink 30. At this time, the air outlet of the fan 50 faces the inside of the heat sink 30, so that the airflow generated by the fan 50 passes through the heat sink 30. When the light emitting diode lamp is used, the light emitting diode 22 is energized and emitted, and the light emitting diode 22 is generated. Heat is conducted by the circuit board 24 to the heat sink 30. Since a fan 50 is added to the top of the heat sink 30, the heat sink 30 can be actively dissipated by the airflow generated by the fan 50 to improve the heat dissipation efficiency of the LED lamp. Heat is transferred to the fins 340 via the inner wall surface of the prism 32. Due to the rotation of the fan 50 blade (not shown), the air is disturbed to generate airflow. The airflow flows from the top of the heat sink 30 into the prism 32, passes through the gap between the fins 340, and finally discharges the prism 32 from the bottom of the heat sink 30, thereby carrying heat to the outside of the heat sink 30. Since the flow rate of the air generated by the rotation of the fan blade 50 is relatively high, most of the heat can be taken away in a short time, thereby avoiding the fact that the invention has met the requirements of the invention patent, as described in 10 200912188 et al.遂Certificate according to the law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the patent in this case. Any equivalent modifications or changes made in accordance with the spirit of the present invention should be covered by the following patents. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective assembled view of an embodiment of the present invention. 2 is an exploded perspective view of FIG. 1. Figure 3 is a schematic diagram of the heat sink of the heat-emitting diode module and the fan of Figure 2. Figure 0 Figure 4 is a transverse cross-sectional view of the heat sink of Figure 2. [Description of main components] Lampshade 10 LED module 20 Circuit board 24 Prism 32 Passage 322 Rotary group 34 Lamp cover 40 Opening U, 42 Light-emitting diode 22 Heat sink 30 Outer wall 320 Connection part 324 Fin 340 fan 50 η