.M353319 八、新型說明： 【新型所屬之技術領域】 本新型是有關於一種發光模組及發光裝置，特別是指 一種具有可加強散熱效果的發光二極體發光模組及發光二 極體發光裝置。 【先前技術】 圖1所示為一習知的發光二極體的發光裝置9，其包括 多數個發光二極體91 ’由於發光二極體91是密集地排列， 其工作所產生的熱能很高，會影響使用壽命，因此發光裝 置9内部設有一朝發光二極體91吹送的風扇92，以達迅速 散熱目的。 上述的散熱設計所產生的空氣循環過程如圖中箭頭假 想線所示，即發光裝置9外的空氣由多數個第一氣孔％進 入，先經過電源供應器94，再被風扇92引導流向發光二極 體91處’然後由多數個第二氣孔％排出。然而，由於發 光裝置9外的空氣是先通過亦會散發出熱能的電源供應器 94，也就是空氣已先升溫，而把升溫後的空氣向發光二極 體91吹送’能夠得到的散熱效果有限，並非理想的散熱設 計。 【新型内容】 因此，本新型之— 效果的發光模組。 目的，即在提供一 種具有加強散熱 本新型之另一目的 的發光裝置。 即在提供一種具有上述發光模 組 5 M353319 於是’本新型的發光裝置包含一本體、一發光單元、. 一散熱單元及一電源供應器。該本體包括一圍繞界定出一 空間的圍繞壁’該圍繞壁具有一連通該空間的第一開口， 該本體更包括徑向貫穿形成於該圍繞壁鄰近該第一開口處 的多數個第一氣孔，及遠離該第一開口處的多數個第二氣 孔；該發光單元設於該本體的空間中且鄰近該第一開口處 ，並提供射出該第一開口的光線；該散熱單元，設於該發 光單元遠離該第一開口之一側且位於所述第一氣孔舆第二 氣孔間，並包括一風扇；該電源供應器設於該散熱單元遠 離該發光單元之一側，且電連接該發光單元及散熱單元。 其中，該散熱單元的風扇提供朝遠離該第一開口方向吹送 的氣流，使該本體外的空氣由所述第一氣孔進入，通過該 發光單元表面後由所述第二氣孔排出。 進一步地，該散熱單元更包括一介於該發光單元與風 扇的導流罩，該導流罩具有—導流孔，該風扇是固定於該 導流孔處。 / 另外，該發光單元包括一電路板及多數個發光二極體 ’該電路板具有-朝向該第―開口的正面與—相反的背面 ，所述發光二極體是設置於該正面。 有關該電路板的材質，較佳地是由銘、陶竟或玻 維等局散熱係數材質所製成。 更進一步地，該散熱單元更包括一設於該發光單 電路板背面的散熱件，該散熱件遠離該電路板側具有 個散賴片。較佳地，該導流罩是固定在該散熱件遠離兮 .M353319 電路板一側，且覆蓋接觸所述散熱鰭片。 另外，該電路板正面形成一鄰近中央的中心區及一環 繞該中心區的外圍區，所述發光二極體是在該个心區呈矩 陣式排列。 較佳地，本新型的發光裝置更包含—封閉該本體的第 一開口的鏡片單元及一截頭圓錐形的反射罩，該反射罩一 端抵頂於該鏡片單元，另一端抵頂於該電路板正面，且將 該中心區與外圍區隔開。 在本新型的實施例中，該本體更包括—具有外螺紋的 基座，該圍繞壁更具有一第二開口，該基座是設於該第二 開口。其中，該本體的圍繞壁概略沿—轴線環繞，該轴線 通過該第一開口及第二開口之中心，該第一開口的面積大 :亥第二開口的面積’而所述第二氣孔是位於鄰近該第二 “處。另外，該本體的圍繞壁更具有—鄰近該第二開口 的卡合部’供該電源供應器卡固。 上述第-氣孔及第二氣孔的數量是相同，而該圍繞壁 卜：面更凸設多數個由鄰近該第一開口處延伸向該第二開 ，的肋板，每-肋板分別將二相鄰的第一氣孔及第二氣 孔隔開。 另外，本新型的發光模組包含一發光單元、一散故單 2 —電源供應器。該-發光單元包括一電路板及多數個 路丄 4路H正面與—相反的背面，所述 2二極體是設置於該正面；該散熱單元，與該發光單元 且位於相對靠近該電路板的背面側，並包括-風扇 7 M353319 ;該電源供應n ’電連接該發光單元及散熱單元。其中， 該散熱單元的風扇提供朝遠離該發光單元方向吹送的氣流 ，使空氣通過該發光單元之電路板的背面—側，再由該散 熱單元鄰近該發光單元側流向遠離該發光單元側。 /述該發光單元更包括—設於該電路板背面的散熱件 ，該散熱件遠離該電路板側具有多數個散熱鰭片。 另外，該散熱單元更包括-介於該散熱件與風扇間的 導流罩，該導流罩具有-導流孔，該風扇是固定於該導流 孔處。較佳地，該導流罩是覆蓋接觸所述散熱續片。 —進一步地，該電路板正面形成一鄰近中央的中心區及 —環繞該中心區的外圍區，所述發光二極體是在該中心區 呈矩陣式排列。 有關該電路板的材質，較佳地是由紹、陶竟或玻璃纖 維等高散熱係數材質所製成。 ▲本新型將該散熱單元是發光單元相接觸地設置，並使 ”亥風扇提供由該第__開口朝該第二開口方向吹送的氣流， 使冷空氣直接由所述第一氣孔進入而接觸發光單元及散熱 件’提高散熱效能。 【實施方式】 、有關本新型之如述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚地呈現。 ^參閱圖2、圖3與圖4 ’本新型發光裝置100之較佳實 知例包含—本體1、-發光單元2、一散熱單元3、一電源 M353319 供應器4、一鏡片單元5及一反射罩6。 本體1包括一圍繞壁η及一基座12，在本實施例中， 圍繞壁11是環繞一軸線L的截頭圓錐形。圍繞壁u内部 界定出一空間111，且兩端分別形成連通空間丨丨丨的一第一 開口 112及一第二開口 113。較佳地，第一開口 112的面積 大於第二開口 113的面積，且軸線L分別通過第一開口 η〕 及一第二開口 113的中心。 圍繞壁U鄰近第一開口 112處相間隔地形成徑向貫穿 至空間111的多數個第一氣孔114，而鄰近第二開口 113處 相間隔地形成徑向貫穿至空間U1的多數個第二氣孔115。 在本實施例中，第-氣孔114與第：氣孔115的數量相I 且分別為長槽狀’而圍繞壁U外表面設有多數個沿轴線L 方向延伸的肋板116，且每一肋板116是爽設於任兩相鄰的 第-氣孔114與任兩相鄰的第二氣孔115間。當然第—氣 孔114與第二氣孔115的數量及形狀不以本實施例為限。另 外如圖3、4所不，圍繞壁^内表面，鄰近第一氣孔… 處凸設有多數個固定座117，且第一開口 ιΐ2貞第一氣孔 114間設有供鏡片單元5固定用的内螺紋118。 基座12是封設於第二開口 113處，在本實施例中，基 座12外表面設有外螺紋⑵，用以螺接於-燈泡座（圖未 不）而引入交流電。 、，發光單元2容設於本體1之圍繞壁11的空間m中， 卫已括電路板21及多數個安裝於該電路板21上的發光 一極體22。在本實施例中，電路板21是配合圍繞壁“而 M353319.M353319 VIII. New Description: [New Technology Field] The present invention relates to a light-emitting module and a light-emitting device, and particularly to a light-emitting diode light-emitting module and a light-emitting diode light-emitting device capable of enhancing heat dissipation effect Device. [Prior Art] FIG. 1 shows a conventional light-emitting diode light-emitting device 9 including a plurality of light-emitting diodes 91'. Since the light-emitting diodes 91 are densely arranged, the heat energy generated by the operation is very high. If the height is high, the service life is affected. Therefore, the light-emitting device 9 is internally provided with a fan 92 that is blown toward the light-emitting diode 91 for rapid heat dissipation. The air circulation process generated by the above heat dissipation design is as shown by the arrow imaginary line in the figure, that is, the air outside the light-emitting device 9 enters by a plurality of first air holes, first passes through the power supply 94, and then is guided by the fan 92 to the light-emitting two. The pole body 91 is then discharged by a plurality of second pores. However, since the air outside the illuminating device 9 passes through the power supply 94 which also emits thermal energy, that is, the air has been heated first, and the warmed air is blown to the illuminating diode 91, the heat dissipation effect can be limited. Not ideal for thermal design. [New content] Therefore, the present invention - the effect of the light-emitting module. The object is to provide a light-emitting device having another object of enhancing the heat dissipation of the present invention. That is, there is provided a light-emitting module having the above-mentioned light-emitting module 5 M353319. The light-emitting device of the present invention comprises a body, a light-emitting unit, a heat-dissipating unit and a power supply. The body includes a surrounding wall defining a space, the surrounding wall having a first opening communicating with the space, the body further comprising a plurality of first air holes radially extending through the surrounding wall adjacent to the first opening And a plurality of second air holes away from the first opening; the light emitting unit is disposed in the space of the body and adjacent to the first opening, and provides light for emitting the first opening; the heat dissipating unit is disposed at the The light emitting unit is located away from the first opening and located between the first air hole and the second air hole, and includes a fan. The power supply is disposed on a side of the heat dissipation unit away from the light emitting unit, and electrically connects the light. Unit and heat sink unit. The fan of the heat dissipating unit provides an airflow that is blown away from the first opening, so that the air outside the body enters the first air hole, passes through the surface of the light emitting unit, and is discharged by the second air hole. Further, the heat dissipating unit further includes a flow guiding cover between the light emitting unit and the fan, the air guiding cover has a guiding hole, and the fan is fixed at the guiding hole. In addition, the light-emitting unit includes a circuit board and a plurality of light-emitting diodes. The circuit board has a front surface opposite to the front surface of the first opening, and the light-emitting diode is disposed on the front surface. The material of the circuit board is preferably made of a heat dissipation coefficient material such as Ming, Tao Jing or Boli. Further, the heat dissipating unit further includes a heat dissipating member disposed on the back surface of the light emitting single circuit board, the heat dissipating member having a loose sheet away from the side of the circuit board. Preferably, the shroud is fixed on the side of the heat sink away from the 兮.M353319 circuit board and covers the heat sink fins. In addition, the front surface of the circuit board forms a central area adjacent to the center and a peripheral area surrounding the central area, and the light emitting diodes are arranged in a matrix in the core area. Preferably, the illuminating device of the present invention further includes a lens unit that closes the first opening of the body and a frustoconical reflecting cover, the reflecting cover having one end abutting the lens unit and the other end abutting the circuit The front side of the board is spaced apart from the peripheral area. In an embodiment of the invention, the body further includes a base having an external thread, the surrounding wall further having a second opening, the base being disposed in the second opening. The surrounding wall of the body is generally surrounded by an axis passing through the center of the first opening and the second opening, the area of the first opening being large: the area of the second opening of the second opening and the second air hole Is located adjacent to the second "where. In addition, the surrounding wall of the body has a locking portion adjacent to the second opening for the power supply to be secured. The number of the first air hole and the second air hole are the same, And the surrounding wall: the surface is more convexly arranged by the plurality of ribs extending adjacent to the first opening to the second opening, and each of the ribs respectively separates the two adjacent first and second air holes. In addition, the light-emitting module of the present invention comprises a light-emitting unit and a single-source power supply. The light-emitting unit comprises a circuit board and a plurality of roads, a road surface, a front surface and an opposite back surface. The heat dissipating unit is disposed on the back side of the circuit board opposite to the light emitting unit, and includes a fan 7 M353319; the power supply n' is electrically connected to the light emitting unit and the heat dissipating unit. The fan of the heat dissipation unit The airflow blown away from the direction of the light-emitting unit is such that the air passes through the back side of the circuit board of the light-emitting unit, and then the heat-dissipating unit flows away from the light-emitting unit side away from the light-emitting unit side. The heat dissipating member has a plurality of heat dissipating fins away from the side of the circuit board. The heat dissipating unit further includes a shroud between the heat dissipating member and the fan, the shroud having a flow guiding hole, wherein the fan is fixed to the air guiding hole. Preferably, the air guiding cover covers the heat radiating film. Further, the front surface of the circuit board forms a central area adjacent to the center and Surrounding the peripheral area of the central area, the light emitting diodes are arranged in a matrix in the central area. The material of the circuit board is preferably made of high heat dissipation coefficient materials such as Shao, Tao Jing or glass fiber. ▲ The new type of heat dissipating unit is disposed in contact with the light emitting unit, and causes the "hai fan to provide a flow of air blown from the first opening toward the second opening, so that the cold air is directly from the first An air hole enters and contacts the light-emitting unit and the heat sink to improve heat dissipation. [Embodiment] The present invention, as well as other technical contents, features and functions, will be clearly described in the following detailed description of a preferred embodiment with reference to the drawings. Referring to FIG. 2, FIG. 3 and FIG. 4, a preferred embodiment of the novel light-emitting device 100 includes a body 1, a light-emitting unit 2, a heat-dissipating unit 3, a power source M353319, a lens unit 4, and a lens unit 5 and a unit. Reflector 6. The body 1 includes a surrounding wall η and a pedestal 12. In the present embodiment, the surrounding wall 11 is frustoconical around an axis L. A space 111 is defined around the interior of the wall u, and a first opening 112 and a second opening 113 respectively forming a communication space 两端 are formed at both ends. Preferably, the area of the first opening 112 is larger than the area of the second opening 113, and the axis L passes through the centers of the first opening η] and the second opening 113, respectively. A plurality of first air holes 114 radially extending into the space 111 are formed around the wall U adjacent to the first opening 112, and a plurality of second air holes radially extending into the space U1 are formed adjacent to the second opening 113 at intervals 115. In the present embodiment, the number of the first air holes 114 and the first air holes 115 are I and are respectively long groove-shaped ', and a plurality of ribs 116 extending in the direction of the axis L are provided around the outer surface of the wall U, and each The ribs 116 are desirably disposed between any two adjacent first air holes 114 and any two adjacent second air holes 115. Of course, the number and shape of the first air hole 114 and the second air hole 115 are not limited to this embodiment. In addition, as shown in FIGS. 3 and 4, a plurality of fixing seats 117 are protruded from the inner surface of the wall, adjacent to the first air hole, and the first opening ι2 is provided between the first air holes 114 for fixing the lens unit 5. Internal thread 118. The base 12 is sealed at the second opening 113. In the embodiment, the outer surface of the base 12 is provided with an external thread (2) for screwing into the bulb holder (not shown) to introduce an alternating current. The light-emitting unit 2 is housed in the space m surrounding the wall 11 of the body 1. The circuit board 21 and a plurality of light-emitting diodes 22 mounted on the circuit board 21 are included. In this embodiment, the circuit board 21 is fitted around the wall "and M353319
概呈圓形，並具有一正面211、一背面212及多數個貫孔 213。電路板21的正面211劃分為一鄰近中央的中心區215 及-環繞該中心區215的外圍區216。而貫孔213是位在外 圍區216，且電路板21是藉由多數個螺絲（圖未示）穿過 貫孔213而固定在圍繞壁n内表面的固定座117。有關電 路板21的材質，主要是由鋁、陶瓷或玻璃纖維等高散熱係 數材質所製成，以提高散熱效能，但並不以此為限。另外 ，發光二極體22是設於電路板21之正面211的中心區215 ，較佳地是排列呈一矩陣。 散熱皁元3容設於本體丨之圍繞壁u的空間iu中， 且位於發光單元2遠離第-開口 112側，並包括一散熱令 31、-導流罩32及-風扇33。散熱件31固定於電路板2 的背面212,且遠離電路板21 一側具有多數個散熱鰭片3ιι 。導流罩32是固定於散熱件31遠離電路板21側且覆蓋 接觸散熱鰭片3U。導流罩32中央並貫穿形成—導流孔321 ，供來自散熱鰭片311的氣流通過而導出。另外，風扇33It is generally circular and has a front surface 211, a back surface 212 and a plurality of through holes 213. The front side 211 of the circuit board 21 is divided into a central area 215 adjacent to the center and a peripheral area 216 surrounding the central area 215. The through hole 213 is located in the outer peripheral portion 216, and the circuit board 21 is fixed to the fixing seat 117 surrounding the inner surface of the wall n by a plurality of screws (not shown) passing through the through hole 213. The material of the circuit board 21 is mainly made of a high heat dissipation coefficient material such as aluminum, ceramic or glass fiber to improve the heat dissipation performance, but is not limited thereto. In addition, the LEDs 22 are disposed in the central region 215 of the front surface 211 of the circuit board 21, and are preferably arranged in a matrix. The heat dissipating soap element 3 is disposed in the space iu of the body surrounding the wall u, and is located away from the first opening 112 side of the light emitting unit 2, and includes a heat dissipating ring 31, a shroud 32 and a fan 33. The heat sink 31 is fixed to the back surface 212 of the circuit board 2, and has a plurality of heat dissipation fins 3ι1 on the side away from the circuit board 21. The shroud 32 is fixed to the side of the heat sink 31 away from the circuit board 21 and covers the heat sink fins 3U. The center of the shroud 32 is formed through the through-hole 321 for the passage of airflow from the fins 311. In addition, the fan 33
固定於導流罩32的導流孔321處，並提供由第一開口 ιΐ2 朝第二開口 U3方向吹送的氣流。特別要說明的是，散熱件 可基於成本考量而捨棄不肖，而將導流罩32目定於電路 板21的背面212，並配合調降發光單元2的發光二極體η 的即可。 有關上述散熱件31、導流罩32及風扇33的固定方式 w 土本上可以利用螺合、卡合或焊接等方式。另外，發光 早兀2及散熱單元3可預先固定組合成-體，藉由電路板 10 • M353319 2i固定在ι繞壁u的固定座117日寺，便可達成發光單元2 及散熱單元3的固定。進—步來說，發光單元2及散熱單 元3配合電源供應器4即可構成一發光模組，供其他用於 提供照明的裝置利用。 電源供應器4容設於本體丨之圍繞壁u的空間iu中 ’且固定於鄰近第二開〇 113處。在本實施例中，圍繞壁 11鄰近第二開D 113 4形成配合電源供應|| 4端部外形的 一卡合部丨19,藉以卡固電源供應器4。電源供應器4 ^多 數條電線（圖未示）分別電連接基座12、電路板2ι及風扇 33,並將由基座12送入的交流電轉換成直流電以供電路板 21及風扇33使用。 鏡片單元5設於本體1之圍繞壁u的第一開口 112處 ，並包括一環狀框體51及一固定於該框體51的可透光堅 硬材質製成的鏡片52。在本實施例中，框體51外表面設有 外螺紋511 ’用以配合圍繞壁11的内螺紋丨18而螺固，並 藉此封閉第一開口 112，並對本體1空間1丨丨内的元件提供 保護作用。 反射罩6夾设於發光早元2及鏡片單元5間，其内表 面可反射光線，用以提高發光單元2的照明效率。在本實 施例中’反射罩6呈截頭圓錐形，部分容置於鏡片單元5 之框體51中，並一端抵頂於鏡片52，另一端抵頂於該電路 板21的正面211，將正面211的中心區215與外圍區216 隔開。 接下來請參閱圖4 ’詳細說明散熱過程。如前所述，由 11 M353319 於風扇33提供由第一開口 112朝第二開口 113方向吹送的 氣流，因此空氣的主要對流路徑如箭頭假想線所示本體J 外的空軋是由第一氣孔114進入，通過電路板21及散熱件 31表面後’由導流罩32集中，受風扇33弓（導流向電源供 應器4側’再由第二氣孔115排出。換句話說，由於冷空氣 是直接由第-氣孔114進人而接觸電路板21及散熱件31， 而不是類似習知般地先通過電源供應器4,因此不會先被加 溫後才吹送向電路板21及散熱件3卜對於發光單元2的散 熱而言較有利。另外，散熱單元3是與發光單元2設在一 起，配合導流I 32引導，可有效地將熱能藉由對流帶走。 特別要強調的是，若風扇33提供氣流的方向相反，即 是類似習知方式提供由第二開口⑴朝第-開口 112方向吹 送，當空氣遭遇散熱件31的散熱鰭片311時，其複雜的結 構反而使空氣形成紊流，降低 耳他對流效果。而本案使氣流吹 向電源供應器4侧，因為鄰近第二開口 113處的結構單純， 較不會造成紊流。 另外，由於圍繞壁U是呈巷 疋主戳碩圓錐形，且由第一開口 112處朝向第二開口 113漸 扪用柏努利定理可使氣流加 、將…、二氣快速導出，而圍繞壁1 1 # t 4 f 4二 固凡i 11外表面的肋板116亦 了產生導〜作用，並可增加圍繞 n 1 11強度。當然，有關圍 繞壁11的形狀並不以截頭圓 ,||f 7為限，較佳地以能使氣流 順利机動為原則。除此之外， m ,, ^ y 射罩6雖主要用以提高照 月效率，但亦產生使熱能以輕 而輔助散熱。 ^方式向外傳送的效果，途 12 M353319 綜上所述，本新型發光裝置將散熱單& 3與發光 單元2固定在—起，並使風扇33提供由第一開口 112朝第 二開口 113方向吹送的氣流，使冷空氣直接由第—氣孔⑴ =入而接觸發光單元2及散熱件31，並配合圍繞^ η、導 流罩32提高空氣對流效率，甚至利用反射罩6輔助，提高 散熱效能，故確實能達成本新型之目的。 惟以上所述者，僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一剖面示意圖’說明一習知的發光二極體的發 光裝置； 圖2是一立體圖，說明本新型發光裝置的較佳實施例 9 圖3是圖2中發光裝置的立體分解圖；及 圖4是圖3中發光裝置的剖面示意圖。 13 M353319 【主要元件符號說明】 100… •…發光裝置 213… …·貫孔 1…… …·本體 215… ···.中心區 11 ··... •…圍繞壁 216… •…外圍區 111… …·空間 22 •…發光二極體 112 ... •…第一開口 3…… …·散熱單元 113… •…第二開口 31…… •…散熱件 114… —弟 氣孔 311… …·散熱鰭片 115… •…第二氣孔 32…… •…導流罩 116… •…肋板 321… …·導流孔 117… •…固定座 33·.··· ----風扇 118… …·内螺紋 4…… •…電源供應斋 119… ——^合部 5…… •…鏡片單元 12…… ----基座 51 … …·框體 121 · …外螺紋 511… •…外螺紋 2 ....... …發光單元 52···· …·鏡片 21…… …電路板 6…… •…反射罩 211 ···· …正面 L…… …·軸線 212 ··· …背面 14It is fixed to the flow guiding hole 321 of the shroud 32 and provides an air flow blown by the first opening ι2 toward the second opening U3. In particular, the heat dissipating member can be discarded based on cost considerations, and the shroud 32 can be positioned on the back surface 212 of the circuit board 21 and matched with the light-emitting diode η of the light-emitting unit 2. The fixing method of the heat dissipating member 31, the air guiding cover 32, and the fan 33 can be screwed, engaged, or welded. In addition, the light-emitting unit 2 and the heat-dissipating unit 3 can be fixedly combined into a body in advance, and the light-emitting unit 2 and the heat-dissipating unit 3 can be realized by fixing the circuit board 10 • M353319 2i to the fixed seat 117 of the wall u. fixed. In the second step, the light-emitting unit 2 and the heat-dissipating unit 3 cooperate with the power supply 4 to form a light-emitting module for use by other means for providing illumination. The power supply unit 4 is housed in the space iu of the body 围绕 surrounding the wall u and is fixed adjacent to the second opening 113. In the present embodiment, a surrounding portion 11 is formed adjacent to the second opening D 113 4 around the wall 11 to form an engaging portion 配合 19 that matches the end shape of the power supply || 4 to thereby secure the power supply 4. The power supply 4 ^ plurality of wires (not shown) are electrically connected to the susceptor 12, the circuit board 2 ι and the fan 33, respectively, and convert the alternating current fed from the susceptor 12 into direct current for use by the circuit board 21 and the fan 33. The lens unit 5 is disposed at the first opening 112 of the body 1 surrounding the wall u, and includes an annular frame 51 and a lens 52 made of a light transmissive hard material fixed to the frame 51. In this embodiment, the outer surface of the frame 51 is provided with an external thread 511 ' for screwing around the internal thread 丨 18 surrounding the wall 11 , and thereby closing the first opening 112 and the space 1 of the body 1 The components provide protection. The reflector 6 is interposed between the light-emitting element 2 and the lens unit 5, and the inner surface thereof reflects light to improve the illumination efficiency of the light-emitting unit 2. In the present embodiment, the reflector 6 is frustoconical, and is partially received in the frame 51 of the lens unit 5, and one end abuts against the lens 52, and the other end abuts against the front surface 211 of the circuit board 21, The central area 215 of the front side 211 is spaced from the peripheral area 216. Next, please refer to Figure 4' for a detailed description of the heat dissipation process. As described above, the airflow blown by the first opening 112 toward the second opening 113 is provided by the fan 33 by the M353319, so that the main convection path of the air, as indicated by the arrow imaginary line, is the first air hole. 114 enters, passes through the surface of the circuit board 21 and the heat sink 31, and is concentrated by the shroud 32, and is led by the fan 33 (converted to the side of the power supply 4) and then discharged by the second air hole 115. In other words, because the cold air is Directly entering the circuit board 21 and the heat sink 31 by the first air hole 114, instead of first passing through the power supply 4, it is not blown before being blown to the circuit board 21 and the heat sink 3 It is advantageous for the heat dissipation of the light-emitting unit 2. In addition, the heat-dissipating unit 3 is disposed together with the light-emitting unit 2, and is guided by the flow guiding I 32 to effectively carry the heat energy away by convection. If the fan 33 provides the opposite direction of the airflow, that is, it is provided in a similar manner to provide the second opening (1) toward the first opening 112, when the air encounters the heat dissipating fins 311 of the heat dissipating member 31, the complicated structure causes the air to form. Turbulent flow The convection effect of the ear is reduced. In this case, the airflow is blown to the side of the power supply 4, because the structure adjacent to the second opening 113 is simple, and no turbulence is caused. In addition, since the surrounding wall U is a main cone Shape, and from the first opening 112 toward the second opening 113, the Bernoulli theorem can be used to add airflow, and the two gases can be quickly exported, while surrounding the wall 1 1 # t 4 f 4 The surface ribs 116 also exert a guiding effect and can increase the strength around n 1 11. Of course, the shape about the surrounding wall 11 is not limited by the truncated circle, ||f 7 , preferably to enable air flow. In addition to this, m , , ^ y shot mask 6 is mainly used to improve the efficiency of the moonlight, but also produces heat to help the heat to light. ^ Way to the effect of outward transmission, way 12 M353319 As described above, the novel light-emitting device fixes the heat-dissipating unit & 3 and the light-emitting unit 2, and causes the fan 33 to supply the airflow blown by the first opening 112 toward the second opening 113, so that the cold air is directly from the first Air hole (1) = in contact with the light unit 2 and the heat sink 31, and fit around ^ η, the shroud 32 improves the efficiency of air convection, even with the help of the reflector 6, to improve the heat dissipation performance, so it can achieve the purpose of the present invention. However, the above is only the preferred embodiment of the present invention, when It is not possible to limit the scope of this new implementation, that is, the simple equivalent changes and modifications made by the new patent application scope and the new description content are still within the scope of this new patent. [Simplified illustration] 1 is a schematic cross-sectional view showing a conventional light-emitting device of a light-emitting diode; FIG. 2 is a perspective view showing a preferred embodiment of the light-emitting device of the present invention; FIG. 3 is an exploded perspective view of the light-emitting device of FIG. 4 is a schematic cross-sectional view of the light emitting device of FIG. 3. 13 M353319 [Explanation of main component symbols] 100... •...Light-emitting device 213...··through hole 1.........body 215...···.Center area 11··...•...around wall 216... •...peripheral area 111... The space 22 • The light-emitting diode 112 ... • the first opening 3 ... ... the heat-dissipating unit 113 ... • the second opening 31 ... ... the heat sink 114 ... - the air hole 311 ... · Heat sink fins 115... •... second air holes 32... •... shroud 116... •... ribs 321... ...·drain holes 117... •...seats 33·.··· ----Fan 118 ...·Internal thread 4... •...Power supply 斋119... ——^合部5... •...Lens unit 12... ----Base 51 ... ... frame 121 · External thread 511... ...external thread 2 .............lighting unit 52······lens 21...circuit board 6...•...reflector 211 ·····front side L... ··...back 14