201002995 九、發明說明： 【發明所屬之技術領域】 本發明係涉及一種照明裝置，尤係關於一種具有高散 熱效率之半導體照明裝置。 【先前技術】 人們由於長期過度依賴石化燃料，除造成能源短缺及 石油價格高漲而牽動經濟發展，更使全球二氧化碳與有害 氣體的排放濃度日益增加，導致地球暖化所引起的氣候反 常、生態環境的破壞、以及對人類生存的危害日益顯現， 為永續經營人類賴以生存的地球生態環境，必須同時解決 =源危機與環境污染問題，開發新能源及再生能源是推動 節約能源及高效率使用能源最重要的策略，而傳統照明所 消耗的能源極為可觀，發展照明節能將是最重要的新能源 科技’而半導體照明制高功率高亮度的發光二極體（le& 為光源，該新光源以其高發光效率、節能、長壽、環保 動快、指向性等優點，具有廣泛取代傳統照明光 源、的潛力。 led由於輸入電能的80%〜9〇%轉變成為熱量， 10%〜20%轉化為光能，且由於 '、 散熱是LED封裝必須解決的關鍵問題=二，因此芯片 在同等輸入功率下得到較低的工作溫度，統可 f:，或在同樣的溫度限制範圍内，增加輪:功率片用 费度’從而增力口 led燈的亮度； 及…點溫度（Junction 201002995 tempe_re)是衡f LED封裝散熱性能的重要技術指標，由 *於散熱不良導致的結點溫度升高，將嚴重影響到發光波 .. 長、光強、光效和使用壽命。 • 應、用高功率高亮度led在照明的新光源上，必須配合 尚效率的散熱機構以儘量降低LED的結點溫度，才能發揮 上述諸多優點，否則照明裝置的發光亮度、使用壽命將大 打折扣，影響所及將使該照明裝置的節能效果不彰，並直 接衝擊該照明裝置的可靠庚 d m 裝置失效。罪度引發嚴重的光衰甚至使照明 、古欲使該半導體照明裳置能持續自外界引進較低溫氣 Μ ’必需在㈣裝置中建立—低流阻的冷卻氣流通道；在 2用風扇的狀況下’由於自然循環的驅動力只能藉由存 A j同處的空氣溫差’該溫差所導致的线密度差會在201002995 IX. Description of the Invention: [Technical Field] The present invention relates to a lighting device, and more particularly to a semiconductor lighting device having high heat dissipation efficiency. [Prior Art] Due to long-term excessive dependence on fossil fuels, in addition to causing energy shortages and high oil prices, economic development is affected, and the global concentration of carbon dioxide and harmful gases is increasing, resulting in climate anomalies caused by global warming and ecological environment. The destruction and the harm to human survival are increasingly manifested. To sustain the operation of the earth's ecological environment on which human beings depend, it must simultaneously solve the problem of source crisis and environmental pollution. The development of new energy and renewable energy is to promote energy conservation and efficient use of energy. The most important strategy, while the energy consumed by traditional lighting is extremely impressive, the development of lighting energy saving will be the most important new energy technology' and the semiconductor lighting system produces high-power and high-brightness light-emitting diodes (le& for the light source, the new light source Its high luminous efficiency, energy saving, longevity, environmental protection, and directivity have the potential to widely replace traditional lighting sources. Led is converted into heat due to 80%~9〇% of input energy, and 10%~20% is converted into Light energy, and because 'heat dissipation is a key problem that LED package must solve = two Therefore, the chip can obtain a lower operating temperature at the same input power, or f:, or within the same temperature limit, increase the wheel: the power chip cost 'and thus increase the brightness of the led light; and ... point Temperature (Junction 201002995 tempe_re) is an important technical indicator of the heat dissipation performance of the LED package. The rise of the junction temperature caused by poor heat dissipation will seriously affect the luminous wave. Long, light intensity, luminous efficiency and service life. • Should use, high-power high-brightness led on the new light source of illumination, must cooperate with the efficiency of the heat dissipation mechanism to minimize the junction temperature of the LED, in order to exert the above advantages, otherwise the illumination brightness and service life of the lighting device will be greatly reduced. The impact will make the lighting device's energy-saving effect ineffective, and directly impact the failure of the illuminating device. The sin caused serious light decay and even the illumination, the ancient desire to make the semiconductor lighting continue The introduction of lower temperature gas 外界 'must be established in the (four) device - low flow resistance cooling air flow channel; in the case of 2 with a fan ' due to natural circulation Powered only by the temperature difference between air at the same memory A j 'This temperature difference results in a difference in linear density will
月、面產生熱⑦力’若該熱浮力能克服氣流通道中的流 阻則可使熱空惫上、、采裕屮¥ ^/;,L 的冷办5， ，/成軋&而移熱，並在散熱面引進新 達A在散熱面形成冷熱氣流交替賴動現象， 達到自然猶環的散熱功效。 #彻!^所述自然循環所產生有限的氣流驅動力只能提供 照明散，因此多應用於低輪出功率的' 处 …、否則在回輸出功率的照明應用，例如路燈，只 =曰魔大的散熱面積達成；在實際應用令，受限於空間 或重量及成本的考晋下，你工間 裝置、Ρ条低卻對輕化與縮小照明 風災的π 負擔、降低雪災的積雪負荷、降低 、虫阻係數、精簡產品成本及提升散熱效率具有顯著 7 201002995 的效益；習知半導體照明裝置雖已見使用風扇的產品，但 . 由於風扇的吸風側會將空氣中浮懸的塵埃一併帶入，日積 月累的沉積於照明裝置的鰭片上，對散熱效率的降低具有 • 一定的影響，尤其路燈離地面的高度造成清理的困難；另 外，由於流道的設計不良無法導引絕大部分的冷卻氣流進 入鰭片側，以致無法充分利用風扇的風量；再則，未充分 利用自然冷卻資源的節能效益；上述缺點使習知半導體照 明裝置無法充分顯現強制冷卻氣流的效益，甚至影響照明 品質的穩定性與使用的壽命。 【發明内容】 有鑒於此，有必要提供一種能充分利用風扇強制循環 散熱之照明裝置。 一種照明裝置，包括一光學部、一電氣部、一燈殼及 一散熱部，該光學部包括至少一光源及一出光通道，用以 提供所需的照明亮度與發光特性及光源保護；該電氣部用 以提供該光源所需要之驅動電源、控制電路及電源管理； 該燈殼内具有一收容空間，所述燈殼上設有與該收容空間 相連通之入風口及出風口；該散熱部包括一固設於該燈殼 上的散熱器及一風扇，該散熱器包括一散熱底板及自該散 熱底板之一侧面向外延伸之複數鰭片，該等鰭片收容於燈 殼之收容空間内，所述鰭片呈間隔分佈且在相鄰鰭片之間 形成有流道’該散熱底板之另一相對側面為一吸熱面，所 述光源设於該吸熱面上並與吸熱面緊密熱接觸，以傳輸光 源發光時所釋放之熱量；該風扇設於燈殼之收容空間内且 8 201002995 於放…器之一端，用以引入冷空氣流過相鄰鰭片之間的 机道’所述燈殼之内壁在與鰭片相對之位置朝向鰭片設有 複數導風片，所述導風片於風扇運轉時授動燈殼内之氣流 並將机向導風片之氣流導向相鄰鰭片之間的流道。 作為散熱裝置的進一步改進，所述散熱底板上設置鑛 片的側面於相鄰鰭片之間的部位設有複數凹槽。 八作為散熱裝置的進一步改進，所述入風口與出風口處 刀別設有-引流罩，所述引流罩包括—設有複數開口的平 二板對應每一開口設有一凸蓋以使氣流僅能沿開口 方向進出燈殼。 本發明具有如下優點： μ j供—種能充分制風扇㈣循環散熱之照明裝置， 高溫氣流的低流阻通道，藉以強化散=率： 細小與輕化照明裝置之功效。 千I運 種能充分利用自然冷卻資源的 =由關燈後照明裝置内外的溫濕度平衡、= 引進較低溫的濕空氣，並冷凝附著於 、卜界 熱底板之凹槽内，以進一步利 ^ : 所述散 源發光時所釋放之熱量。自然冷❹源強化移除光 二數率照明裝置，所述 揮氣流朝㈣流動二：轉二時發 、一種μ絲人風口❹風。設有能有效防塵防 201002995 雨的引流罩，所述引流罩設有複數凸蓋式開口，所述開口 還能藉由開燈期間與關燈期間燈具的内外溫濕度差異，自 動由該人風口與出風口引進外界較低溫的濕线，達到有 效防塵防雨及進一步強化散熱的功效。 提供一種有效運用風扇以發揮節能效益的高效率照明 裝置’藉由關燈後自動引進低溫的濕空氣在氣流通道中加 速發生冷凝現象，從而於再度開燈後可藉以強化散献效 率，並因此能延遲風扇啟動或降低風扇轉速，達到提升風 扇的可罪度及燈具的長壽命與節能功效。 【實施方式】 以下參照圖1至圖9,對本發明照明裝置予以進一步說 明。 圖1係本發明照明裝i -實施例之組裝剖面示 意圖，圖2係® i中光引擎21之立體組裝圖，圖3係圖2 所示光引擎21由另-視角所視之立體組農圖，圖4係圖丄 中導風片421及部分燈罩42之立體圖，圖5係圖工令入風 口 411及出風口 412處所設引流罩43之立體示意圖，圖6 係圖5所示引流罩43由另-視角所視之立體示意圖。該照 明裝置100主要包括一光學部1〇、一散熱部2〇、一電氣部 30及一燈殼40，其中： 光學部10包括複數光源U及一出光通道12，其係設 置於散熱部20下方，本實施例中，所述光源n係包括一 長條狀之導熱基板111、沿縱向設置於導熱基板U1上之複 數發光體112、以及設於該導熱基板ln兩端之複數電極 201002995 113之一體成型件，其中所述發光體112係由至少一半導體 .發光曰:曰片所組成的透明封裝體；該導熱基板111與散熱器 ‘ 22之散熱底板221上的吸熱面223之間的緊密熱接觸可先 ‘在其間塗抹-層熱界面材料（TIM)，再將已套裝電絕緣塾 片=複數螺絲（圖未示）分別通過導熱基板⑴上的複數 固定孔（圖未示），以便鎖固於散熱底板221之吸熱面223 所叹螺孔（圖未示）達成，亦可藉由迴焊方式將導熱基板 111直接黏貼（SMT)於該散熱底板221之吸熱面223上達 成，以傳輸及移除該光源U發光時釋出的熱量；該光源n 的發光可藉由電線（圖未示）連接光源u之電極113與電 氣部30中的電路板31以及藉由電線連接電路板31與電源 (圖未不）達成；其中光學部10之光源U與散熱底板221 上的吸熱面223之間的緊密熱接觸還可採用其他方式，例 如藉由先對散熱底板221上的吸熱面223進行電絕緣處 理，然後在該經電絕緣處理的吸熱面223上鋪設可導電的 基板電路如銅鉑基板電路，再將半導體發光晶片設於吸熱 面223上並與所述基板電路電連接並於半導體發光晶片外 包覆一透明封裝體而達成，採用此種方式之光源不包含導 熱基板111，從而避免導熱基板111與散熱底板221之間接 觸熱阻的産生’光源11所産生的熱量可直接由散熱底板 221吸收並予以快速散發，可進一步提升散熱效率。為方便 敍述，本實施例及以下實施例皆僅以包含有導熱基板1U 及複數發光體112之長條形光源11即光條（light bar)予 以說明，實際上，各實施例中之光源還可以是由複數包含 11 201002995 有導熱基板及單個發光體之光源組成，亦皆可用上述不含 導熱基板111之光源替代。 3 出光通道12包括複數光杯121及一導光罩122，其中 所述光杯121為導引該光源11向外射出光線的錐面，該光 杯ί21底部設有對應於該至少一光源13[的通孔以供發Z體 112穿設並凸伸至該光杯121内，導光罩m為包括至少一 光學鏡片的罩蓋，以提供照明裝置100所需的照明分佈、 發光特性及光源保護的功能。 上述導光罩122中的光學鏡片亦可在光源u的封裝過 程中直接與透明發光體112 —體成型，又可將該導光罩122 中的光學鏡片直接罩蓋於單個發光體112上，以避免二次 光學造成的光損耗。 在實際應用時，光源亦可由複數分離的單個光源組合 而成，此時出光通道12中的光杯及導光罩可以是對應於該 複數分離的光源分開設置，亦可以只用一個光杯及導光罩 的配置。 散熱部20包括一散熱器22及一風扇23，該散熱器22 包括一散熱底板221及自該散熱底板221之一側面224向 外延伸的複數鰭片222,相鄰兩鰭片222之間形成一流道 225’所述侧面224於相鄰兩鰭片222之間的部位設有複數 凹槽226 ;該散熱底板221之另一相對側面為吸熱面223， 藉由光源11與所述吸熱面223的緊密熱接觸，以傳輸光源 11發光時所釋放之熱量；上述光源n與散熱器22相結合 構成一光引擎21。 12 201002995 該燈殼40包括一燈座41及一燈罩42,其中所述燈罩 42係由金屬製成。燈罩42罩設於燈座41上並於燈罩42 與燈座41之間形成一收容空間44，光引擎21藉由散熱底 板221之相對兩侧所設凸緣227與燈座41相固定，並使散 熱器22之鰭片222收容於燈殼40之收容空間44内。另外， 所述燈殼40還設有一入風口 411與一出風口 412，所述入 風口 411及出風口 412分別位於散熱器22之相對兩侧且與 收容空間44連通。 風扇23設於燈殼40之收容空間内且位於散熱器22之 一端，本實施例中，風扇23位於散熱器22靠電氣部30之 一側。該風扇23運轉時朝向鰭片222吹風或自鰭片222吸 風，用以自燈殼40外引入冷空氣流過複數鰭片222之間的 流道225並與鰭片222進行熱交換，以移除光源11發光時 所釋放之熱量；所述燈殼40之内壁於與鰭片222相對之位 置朝向鰭片222設有之複數導風片421，該等導風片421 在鰭片222間流道225之延伸方向上呈高低交錯排佈，所 述導風片421於風扇23運轉時攪動燈殼40内之氣流並將 流向導風片421之氣流由鰭片222之自由端228導入鰭片 222之間的流道225内以強化散熱效率，為使所述導風片 421發揮較好的功效，宜將導風片421佔據鰭片222之自由 端228與燈殼40内壁之間的通道45，·從而使通過該通道 45之氣流的流阻增加；所述導風片421沿流道225之延伸 方向排列成複數排，每一排有複數片導風片421且相鄰導 風片421之間形成一間隙422，前一排導風片421中相鄰導 13 201002995 風片421之間的間隙422與後一排導風片421中相鄰導風 . 片421之間的間隙422在鰭片22間流道225之延伸方向上 ‘·呈交錯分佈，此種排佈可更好地驅使氣流朝鰭片222流動。 - 圖1中箭頭441所示為風扇23運轉時燈殼40内氣流 之流動方向，本實施例中，風扇23為朝鰭片222吹風，氣 流沿水平方向向右流向導風片421，為達更好的效果，該等 導風片421係朝氣流之流動方向的前方傾斜設置，以使沿 水平方向直接流入鰭片222之氣流與沿導風片421流向鰭 片222之氣流在鰭片243之間的流道225内混合，達到在 複數縛片222之間增加紊流（turbulent flow )效果以強化 散熱功效。反之，當風扇23係自鰭片222吸風時，風扇23 運轉時燈殼40内氣流之流動方向與圖1中箭頭441所示方 向相反，氣流沿水平方向向左流向導風片421，則此時導風 片之傾斜方向與圖1中導風片421之傾斜方向相反，即導 風片亦係朝氣流之流動方向的前方傾斜設置。 另外，在亮燈期間相較於照明裝置100外的溫度與濕 度，照明裝置100内具有較高的溫度與較低的濕度，而在 關燈後照明裝置100内外的溫度與濕度會趨於平衡，從而 能自動由外界引入較濕的低溫空氣，並因金屬製燈罩42的 比熱遠高於水氣的特性，使所述較濕的低溫氣流於接觸該 等導風片421與燈罩42之内壁後快速散熱而發生冷凝現 象，冷凝液將沿該等導風片421滑落，除以水膜狀附著於 鰭片222的表面，其餘的冷凝液則儲存於所述散熱底板221 的複數凹槽226 (圖1所示）中及該複數鰭片222之間，由 14 201002995 於水膜冷卻與池水冷卻的熱傳係數均遠高於空氣流的冷 . 卻，可進一步利用上述自然冷卻資源強化移除光源11發光 ‘ 時所釋放之熱量，使風扇23運作得以降低轉速或延遲啟動 時間，從而提升風扇23的可靠度，並使該照明裝置100發 揮穩定的光輸出及長壽命與節能功效。 電氣部30包括一電路板31、及一隔板32，該電路板 31係與光源11的電極113及與電源電連接，所述電源除可 為電池或電瓶等直流電源外，亦可透過電源轉換器將交流 市電轉換為適合光源11的直流電源，並提供光源11之驅 動電源及照明裝置100之電源管理；所述電路板31及隔板 32均設於燈殼40内，該隔板32將電氣部30與散熱部20 隔絕，該隔板32為導熱性良好的金屬製成，藉由經入風口 411進入燈殼40之氣流將電路板31所產生的熱量散出。 該照明裝置100因使用風扇23而成為一開放系統，所 述燈殼40上設有入風口 411與出風口 412，為確保該照明 裝置100於室外使用時的防雨與防塵，所述入風口 411及 出風口 412處分別設有一引流罩43,所述引流罩43包括一 設有複數開口 432的平板431及由該平板431之周緣朝一 侧延伸之一罩體433,該平板431對應每一開口 432設有一 凸蓋434,以使入風口 411與出風口 412只允許氣流朝特定 的開口方向進出燈殼40。其中所述凸蓋434與罩體433位 於平板431之同側，且設於入風口 411之引流罩43的罩體 433朝向燈殼40外，設於出風口 412之引流罩43的罩體朝 向燈殼40内，以更好地導引氣流進出燈殼40。為進一步確 15 201002995 保防雨與防塵的效果’該平板431上還可設置至少一層紗 • 網。本實施例應用於室外的路燈時，所述照明裝置10〇還 ·包括用於與一燈柱接合的一支撑接頭46。 圖7係本發明照明裝置第二實施例中光引擎51之立體 組裝圖，圖8係圖7所示光引擎51由另一視角所視之立體 組裝圖，圖9係配合圖7中光引擎51使用之導風片541及 邛分燈罩54之立體圖；本實施例與第一實施例的主要區別 在於：本實施例中散熱器52之散熱底板521的橫截面呈倒 V形’鰭片522設於散熱底板521之倒V形的凸面523上， 光源11設置於散熱底板521之倒V形的凹面即吸熱面524 上’以便於作不同於第一實施例的匯聚式配光；實際應用 中’所述之散熱底板521的橫截面可依配光需求製作成其 他形狀，例如弧形、V形或波浪形等，以簡化對光源u的 導光調配’從而使光源獲致更準確的定位而優化光學的性 能；本實施例之導風片541與第一實施例之導風片相比， 差別在於導風片541之高度及外形係配合散熱底板521的 杈截面及鰭片522的間距作相應的調整，以發揮前述的導 流及充分利用自然冷卻資源之功能。 由上述的實施方式已清楚說明本發明的技術特徵及達 成之功效，包括： (1)本發明提供一種能充分利用風扇強制循環散熱之 照明裴置，特別係在照明裝置内利用建立有利於持續引進 較低溫氣流並導出較高溫氣流的低流阻通道，藉以強化散 熱效率並達縮小與輕化照明裝置之功效。 16 201002995 (2) 本發明提供一種能充分利用自然冷卻資源的高效 ,率照明裝置，藉由關燈後照明裝置内外的溫濕度平衡效 *'應，自外界引進較低溫的濕空氣，並冷凝附著於鰭片及儲 存於所述散熱底板，以進一步利用自然冷卻資源強化移除 光源發光時所釋放之熱量。 (3) 本發明提供一種包含有複數導風片的高效率照明 裝置’所述導風片設於燈殼之内壁，藉由所述導風片於風 扇轉動時發揮攪動氣流並驅使該氣流朝鰭片流動，以強化 散熱效率。 (4 )本發明照明裝置在入風口與出風口設有能有效防 塵防雨的引流罩’所述引流罩設有複數凸蓋式開口，所述 開口還能藉由開㈣間與關燈期間燈具的内外溫濕度差 異’自動由該入風口與出風口引進外界較低溫的濕空氣， 達到有效防塵防雨及進一步強化散熱的功效。 ▲ (5)本發明提供—種有效運用風扇以發揮節能效益的 :效率照明裝置’藉由關燈後自動引進低溫的濕空氣在氣 道中加速發生冷凝現象，從而於再度開燈後可藉以強 ^熱效率’並因此能延遲風扇啟動或降低風扇轉速，達 ⑼升風扇的可靠度及燈具的長壽命與節能功效。 接屮HI本發明確已符合發明專利之要件，遂依法 利申請。惟’以上所述者僅為本發明之較佳實施例， 之人Γ二此限制本案之申請專利範圍。舉凡熟悉本案技藝 蓋於以月之精神所作之等效修飾或變化，皆應涵 蓋於以下申睛專利範圍内。 17 201002995 【圖式簡單說明】 圖工係本發明照明裝置第一實施例之組裝剖面示意圖。 圖2係圖1中光引擎之立體組裝圖。 圖3係圖2所示光引擎由另__視角所視之立體組裝圖。 圖4係圖i中導風片及部分燈罩之立體圖。 圖5係圖i中入風口及出風口處所設引流罩之立體示 思圆。 ^ 6係圖5所示引流罩由另—視角所視之立體示意圖。 裝圖圖7係本發明照明裝置第二實施例中光引擎之立體組 圖8係圖7所示光引擎由另一視 HI Q总龄人回a a , 見角所視之立體組裝圖。 圖9係配合圖7中光引擎使用 立體圖。 風片及部分燈罩之 【主要元件符號說明】 光學部 10 光源 11 發光體 112 出光通道 12 導光罩 122 光引擎 21、51 散熱底板 221 、 521 吸熱面 223 、 524 流道 225 照明裝置 100 導熱基板 111 複數電極 113 光杯 121 散熱部 20 散熱器 22、52 鰭片 222、522 側面 224 凹槽 226 18 201002995 凸緣 227 風扇 23 電路板 31 燈殼 40 入風口 411 燈罩 42、54 間隙 422 平板 431 罩體 433 收容空間 44 通道 45 凸面 523 自由端 228 電氣部 30 隔板 32 燈座 41 出風口 412 導風片 421 > 541 引流罩 43 開口 432 凸蓋 434 箭頭 441 支撐接頭 46 19If the thermal buoyancy can overcome the flow resistance in the airflow passage, the hot air can be used to make the hot air 惫, 采 屮 ^ ^ ^ ^ L L 而 而 而 而 而 而 而 而 而 而 而 而Heat transfer, and introduce Xinda A on the heat dissipating surface to form a cold and hot air flow alternately on the heat dissipating surface to achieve the heat dissipation effect of the natural helium ring. #彻!^ The limited airflow driving force generated by the natural circulation can only provide illumination dispersion, so it is mostly applied to the low-output power of the 'where ..., otherwise in the return power output lighting applications, such as street lights, only = 曰Large heat dissipation area is achieved; in practical applications, limited by space, weight and cost, your workplace equipment and purlins are low, but the π burden of lightening and reducing lighting storms, reducing the snow load of snow disasters, Reduced, insect resistance coefficient, reduced product cost and improved heat dissipation efficiency have significant 7 201002995 benefits; although the semiconductor lighting device has seen the use of fans, but because the suction side of the fan will float the air in the air And it is accumulated on the fins of the lighting device, which has a certain influence on the reduction of heat dissipation efficiency, especially the height of the street lamp from the ground, which makes it difficult to clean up; The cooling airflow enters the fin side, so that the fan air volume cannot be fully utilized; in addition, the energy saving benefit of the natural cooling resource is not fully utilized; Disadvantages prevent conventional semiconductor lighting devices from fully demonstrating the benefits of forced cooling airflow, and even affecting the stability of lighting quality and the useful life of the device. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an illumination device that can fully utilize the forced circulation of a fan to dissipate heat. An illuminating device includes an optical portion, an electrical portion, a lamp housing and a heat dissipating portion, the optical portion including at least one light source and a light exiting channel for providing required illumination brightness and illuminating characteristics and light source protection; The driving power supply, the control circuit and the power management required for providing the light source; the lamp housing has a receiving space therein, and the lamp housing is provided with an air inlet and an air outlet connected to the receiving space; the heat radiating portion The heat sink includes a heat sink and a plurality of fins extending outward from a side of the heat sink base. The fins are received in the housing of the lamp housing. The fins are spaced apart and a flow path is formed between the adjacent fins. The other opposite side of the heat dissipation substrate is a heat absorption surface. The light source is disposed on the heat absorption surface and is closely heated with the heat absorption surface. Contacting to transmit heat released by the light source; the fan is disposed in the housing space of the lamp housing and 8 201002995 is at one end of the discharge device for introducing cold air through the air passage between adjacent fins' The inner wall of the lamp housing is provided with a plurality of air guiding fins at a position opposite to the fins, and the air guiding sheet guides the airflow in the lamp housing when the fan is running, and guides the airflow of the machine guide vane to the adjacent air. The flow path between the fins. As a further improvement of the heat dissipating device, a side surface of the heat dissipating bottom plate on which the metal piece is disposed is provided with a plurality of grooves at a portion between the adjacent fins. Further, as a further improvement of the heat dissipating device, the air inlet and the air outlet are provided with a drainage cover, and the drainage cover includes a flat plate with a plurality of openings, and a convex cover is provided for each opening to make the air flow only It is possible to enter and exit the lamp housing in the direction of the opening. The invention has the following advantages: μ j provides a lighting device capable of fully producing a fan (4) circulating heat dissipation, and a low flow resistance channel of a high temperature air flow, thereby enhancing the dispersion rate: the effect of the small and light lighting device. Thousands of I can fully utilize the natural cooling resources = balance the temperature and humidity inside and outside the lighting device after turning off the light, = introduce the lower temperature humid air, and condense and attach it to the groove of the hot bottom plate to further benefit : The heat released when the source emits light. The natural cold enthalpy source enhances the removal of the light binary rate illuminating device, and the vortex flow is directed toward (four) flow two: two turns, one type of whirlwind. The utility model is provided with a drainage cover capable of effectively preventing dust from being exposed to the rain of 201002995. The drainage cover is provided with a plurality of convex cover openings, and the opening can also be automatically ventilated by the person by the difference between the temperature and the humidity of the lamp during the period of turning on and off. Introduce a lower temperature wet line with the air outlet to achieve effective dust and rain protection and further enhance heat dissipation. Providing a high-efficiency lighting device that effectively utilizes a fan to achieve energy-saving benefits. By automatically introducing low-temperature humid air after the lamp is turned off, the condensation phenomenon is accelerated in the airflow passage, thereby enhancing the dissipation efficiency after the lamp is turned on again, and thus It can delay the fan start or reduce the fan speed, which can increase the sin of the fan and the long life and energy saving effect of the lamp. [Embodiment] Hereinafter, a lighting device of the present invention will be further described with reference to Figs. 1 to 9 . 1 is a schematic cross-sectional view of an assembly of the illumination device i of the present invention, FIG. 2 is a perspective assembled view of the light engine 21 in the i, and FIG. 3 is a three-dimensional group view of the light engine 21 shown in FIG. Figure 4 is a perspective view of the wind deflector 421 and a portion of the lamp cover 42. Figure 5 is a perspective view of the air inlet 411 and the air outlet 412, and Figure 6 is a drain cover of Figure 5. 43 is a three-dimensional schematic view from another perspective. The illuminating device 100 includes an optical unit 1 , a heat dissipating unit 2 , an electrical unit 30 , and a lamp housing 40 . The optical unit 10 includes a plurality of light sources U and a light exiting channel 12 , which are disposed on the heat dissipating portion 20 . In the embodiment, the light source n includes a long heat-conducting substrate 111, a plurality of illuminators 112 disposed on the heat-conducting substrate U1 in a longitudinal direction, and a plurality of electrodes disposed at two ends of the heat-conducting substrate ln 201002995 113 The one-piece molded part, wherein the illuminant 112 is a transparent package composed of at least one semiconductor illuminator: a slab; the heat-conductive substrate 111 and the heat absorbing surface 223 of the heat sink 221 of the heat sink '22 Intimate thermal contact can be applied first - between the layer of thermal interface material (TIM), and then the set of electrically insulating slabs = multiple screws (not shown) through the fixed holes (not shown) on the heat-conducting substrate (1), In order to achieve the screw hole (not shown) of the heat absorbing surface 223 of the heat dissipation substrate 221, the heat conductive substrate 111 can be directly adhered (SMT) to the heat absorbing surface 223 of the heat dissipation substrate 221. Transfer and move The heat emitted by the light source U is emitted; the light of the light source n can be connected to the electrode 113 of the light source u and the circuit board 31 in the electrical part 30 by wires (not shown), and the circuit board 31 and the power source are connected by wires. (Fig. 6): The intimate thermal contact between the light source U of the optical portion 10 and the heat absorbing surface 223 on the heat dissipation substrate 221 may be otherwise performed, for example, by first heating the heat absorption surface 223 on the heat dissipation substrate 221 Insulating, then laying a conductive substrate circuit such as a copper-platinum substrate circuit on the electrically insulating heat-absorbing surface 223, and then placing the semiconductor light-emitting chip on the heat absorbing surface 223 and electrically connecting the substrate circuit and emitting light to the semiconductor The wafer is coated with a transparent package, and the light source in this manner does not include the heat conductive substrate 111, thereby avoiding the generation of thermal resistance between the heat conductive substrate 111 and the heat dissipation substrate 221. The heat generated by the light source 11 can be directly radiated. The bottom plate 221 absorbs and is quickly dissipated, which further improves the heat dissipation efficiency. For convenience of description, the present embodiment and the following embodiments are all described by the light bar 11 which is a long light source 11 including the heat conductive substrate 1U and the plurality of light emitters 112. In fact, the light source in each embodiment is also It may be composed of a plurality of light sources including a heat-conducting substrate and a single illuminant, and may be replaced by the above-mentioned light source without the heat-conductive substrate 111. The light exiting channel 12 includes a plurality of light cups 121 and a light guide cover 122, wherein the light cup 121 is a tapered surface for guiding the light source 11 to emit light outwardly, and the bottom of the light cup ί21 is corresponding to the at least one light source 13 The through hole is bored for the hair Z body 112 and protrudes into the light cup 121. The light guide cover m is a cover including at least one optical lens to provide illumination distribution and illumination characteristics required by the illumination device 100. The function of light source protection. The optical lens in the light guide cover 122 can be directly formed with the transparent light body 112 during the packaging process of the light source u, and the optical lens in the light guide cover 122 can be directly covered on the single light body 112. To avoid optical loss caused by secondary optics. In practical applications, the light source may also be composed of a plurality of separate light sources. The light cup and the light guide in the light exit channel 12 may be separately arranged corresponding to the plurality of separate light sources, or only one light cup may be used. The configuration of the light guide. The heat dissipating portion 20 includes a heat sink 22 and a fan 23. The heat sink 22 includes a heat dissipating bottom plate 221 and a plurality of fins 222 extending outward from a side surface 224 of the heat dissipating bottom plate 221, and forming between the adjacent fins 222. The side surface 224 of the first-class track 225' is provided with a plurality of grooves 226 at a portion between the adjacent two fins 222; the other opposite side of the heat-dissipating bottom plate 221 is a heat absorption surface 223, and the light source 11 and the heat absorption surface 223 The close thermal contact is to transmit the heat released when the light source 11 emits light; the light source n and the heat sink 22 are combined to form a light engine 21. 12 201002995 The lamp housing 40 includes a lamp holder 41 and a lamp cover 42, wherein the lamp cover 42 is made of metal. The lamp cover 42 is disposed on the lamp holder 41 and forms a receiving space 44 between the lamp cover 42 and the lamp holder 41. The light engine 21 is fixed to the lamp holder 41 by the flange 227 provided on opposite sides of the heat dissipation base plate 221, and The fins 222 of the heat sink 22 are housed in the housing space 44 of the lamp housing 40. In addition, the lamp housing 40 is further provided with an air inlet 411 and an air outlet 412. The air inlet 411 and the air outlet 412 are respectively located on opposite sides of the heat sink 22 and communicate with the receiving space 44. The fan 23 is disposed in the receiving space of the lamp housing 40 and located at one end of the heat sink 22. In the embodiment, the fan 23 is located on the side of the heat sink 22 on the electrical portion 30. The fan 23 blows air toward the fins 222 or sucks from the fins 222 during operation to introduce cold air from the outside of the lamp housing 40 through the flow channel 225 between the plurality of fins 222 and exchange heat with the fins 222 to The heat released by the light source 11 is removed; the inner wall of the lamp housing 40 is disposed at a position opposite to the fin 222 toward the fin 222, and the air guide 421 is between the fins 222. The flow path 225 is arranged in a staggered manner in the extending direction of the flow path 225. The air guiding piece 421 agitates the airflow in the lamp housing 40 when the fan 23 is in operation, and the airflow of the flow guiding air piece 421 is introduced into the fin from the free end 228 of the fin 222. The heat dissipation efficiency is enhanced in the flow path 225 between the sheets 222. In order to make the air guide sheet 421 perform better, the air guide sheet 421 should occupy between the free end 228 of the fin 222 and the inner wall of the lamp housing 40. The passage 45, thereby increasing the flow resistance of the airflow passing through the passage 45; the air guiding fins 421 are arranged in a plurality of rows along the extending direction of the flow passage 225, each of which has a plurality of air guiding fins 421 and adjacent air guiding A gap 422 is formed between the sheets 421, and between the adjacent guides 13 201002995 between the first row of air guides 421 The gap 422 is adjacent to the air guide 421 in the rear row of air guide sheets 421. The gap 422 between the sheets 421 is staggered in the direction in which the flow passages 225 extend between the fins 22, and the arrangement is better able to drive The air flow flows toward the fins 222. - The arrow 441 in FIG. 1 shows the flow direction of the airflow in the lamp housing 40 when the fan 23 is in operation. In this embodiment, the fan 23 blows the fins 222, and the airflow flows to the right in the horizontal direction to the wind guide 421. For better results, the air guiding fins 421 are inclined toward the front in the flow direction of the airflow so that the airflow flowing directly into the fins 222 in the horizontal direction and the airflow flowing toward the fins 222 along the air guiding fins 421 are on the fins 243. The flow path 225 is mixed between them to achieve a turbulent flow effect between the plurality of tabs 222 to enhance heat dissipation. On the other hand, when the fan 23 draws air from the fins 222, the flow direction of the airflow in the lamp housing 40 when the fan 23 is running is opposite to the direction indicated by the arrow 441 in FIG. 1, and the airflow flows to the left to the left guide vane 421 in the horizontal direction. At this time, the inclined direction of the air guiding piece is opposite to the inclined direction of the air guiding piece 421 in FIG. 1, that is, the air guiding piece is also inclined forward in the flow direction of the airflow. In addition, during lighting, compared with the temperature and humidity outside the lighting device 100, the lighting device 100 has a higher temperature and a lower humidity, and the temperature and humidity inside and outside the lighting device 100 tend to balance after the lamp is turned off. Therefore, the relatively humid low-temperature air can be automatically introduced from the outside, and the relatively low-temperature airflow contacts the inner surfaces of the air guiding plate 421 and the lamp cover 42 due to the specific heat of the metal lamp cover 42 being much higher than that of the water gas. After the rapid heat dissipation and condensation occurs, the condensate will slide down along the air guiding sheets 421, and will be attached to the surface of the fins 222 by water film, and the remaining condensed liquid will be stored in the plurality of grooves 226 of the heat dissipating bottom plate 221 Between (in Figure 1) and between the plurality of fins 222, the heat transfer coefficient of the water film cooling and the pool water cooling by 14 201002995 is much higher than that of the air flow. However, the natural cooling resource can be further utilized to enhance the migration. In addition to the heat released when the light source 11 emits light, the fan 23 operates to reduce the rotational speed or delay the start-up time, thereby improving the reliability of the fan 23 and enabling the illumination device 100 to exhibit stable light output and long life. Energy efficiency. The electrical part 30 includes a circuit board 31 and a partition 32. The circuit board 31 is electrically connected to the electrode 113 of the light source 11 and to the power source. The power source can be a DC power source such as a battery or a battery, or can be transmitted through a power source. The converter converts the AC mains into a DC power source suitable for the light source 11, and provides the driving power of the light source 11 and the power management of the lighting device 100; the circuit board 31 and the partition 32 are both disposed in the lamp housing 40, and the partition 32 The electric portion 30 is insulated from the heat radiating portion 20, which is made of a metal having good thermal conductivity, and the heat generated by the circuit board 31 is dissipated by the airflow entering the lamp housing 40 through the air inlet 411. The illuminating device 100 is an open system by using a fan 23, and the lamp housing 40 is provided with an air inlet 411 and an air outlet 412 for ensuring rain and dust prevention when the illuminating device 100 is used outdoors. A drain cover 43 is disposed at each of the 411 and the air outlet 412. The drain cover 43 includes a flat plate 431 having a plurality of openings 432 and a cover 433 extending from a periphery of the flat plate 431 toward one side. The opening 432 is provided with a convex cover 434 so that the air inlet 411 and the air outlet 412 allow only airflow to enter and exit the lamp housing 40 in a specific opening direction. The cover 434 and the cover 433 are located on the same side of the flat plate 431, and the cover 433 of the drainage cover 43 disposed at the air inlet 411 faces the lamp housing 40, and the cover of the drainage cover 43 disposed at the air outlet 412 is oriented. Inside the lamp housing 40, the airflow is better guided into and out of the lamp housing 40. To further confirm the effect of rain protection and dust protection on the 201002995, at least one layer of yarn/net can be placed on the flat plate 431. When the embodiment is applied to an outdoor street light, the lighting device 10 further includes a support joint 46 for engaging with a lamp post. 7 is a perspective assembled view of the light engine 51 in the second embodiment of the lighting device of the present invention, and FIG. 8 is a perspective assembled view of the light engine 51 shown in FIG. 7 from another perspective, and FIG. 9 is a light engine in FIG. The main difference between the present embodiment and the first embodiment is that the heat dissipation bottom plate 521 of the heat sink 52 has an inverted V-shaped fin 522 in this embodiment. The light source 11 is disposed on the inverted V-shaped concave surface of the heat dissipation bottom plate 521, that is, the heat absorption surface 524, so as to be different from the first embodiment. The cross-section of the heat-dissipating bottom plate 521 described in the above can be made into other shapes according to the light-receiving requirements, such as curved, V-shaped or wavy, etc., to simplify the light-guiding arrangement of the light source u, thereby achieving a more accurate positioning of the light source. The difference between the air guiding piece 541 of the present embodiment and the air guiding piece of the first embodiment is that the height and shape of the air guiding piece 541 are matched with the 杈 section of the heat dissipation bottom plate 521 and the spacing of the fins 522. Make corresponding adjustments to play the aforementioned guidance And take full advantage of the natural cooling resources. The technical features and the achieved effects of the present invention have been clearly described by the above embodiments, including: (1) The present invention provides an illumination device capable of fully utilizing the forced circulation of a fan, especially in the use of a lighting device to facilitate continuous operation. The introduction of a lower temperature airflow and the introduction of a lower flow resistance channel with a higher temperature airflow, thereby enhancing the heat dissipation efficiency and achieving the effect of reducing and lightening the lighting device. 16 201002995 (2) The present invention provides an efficient and accurate lighting device capable of fully utilizing natural cooling resources. By adjusting the temperature and humidity inside and outside the lighting device after the lamp is turned off, a lower temperature humid air is introduced from the outside and condensed. Attached to the fins and stored on the heat sink base plate to further utilize the natural cooling resources to enhance the heat released when the light source is removed. (3) The present invention provides a high-efficiency lighting device including a plurality of air guiding sheets. The air guiding sheet is disposed on an inner wall of the lamp housing, and the air guiding sheet exerts a stirring air flow when the fan rotates and drives the air flow toward The fins flow to enhance heat dissipation efficiency. (4) The lighting device of the present invention is provided with a drainage cover capable of effectively preventing dust and rain at the air inlet and the air outlet. The drainage cover is provided with a plurality of convex cover openings, and the opening can also be opened and closed by the opening (four) The difference between the temperature and humidity inside and outside the lamp 'automatically introduces the outside air from the air inlet and the air outlet to the lower temperature and humidity, which effectively reduces dust and rain and further enhances heat dissipation. ▲ (5) The present invention provides an effective use of a fan to achieve energy-saving benefits: an efficiency lighting device automatically accelerates condensation in the air passage by automatically introducing low-temperature humid air after turning off the light, so that it can be strong after being turned on again. ^Thermal efficiency' and thus can delay the fan start or reduce the fan speed, up to the reliability of the (9) liter fan and the long life and energy saving effect of the luminaire. According to HI, the invention has indeed met the requirements of the invention patent and has been applied in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application of the present invention is limited. Any equivalent modifications or changes made in the spirit of the month that are familiar with the skill of the case shall be covered by the following claims. 17 201002995 [Simplified illustration of the drawings] Fig. 1 is a schematic sectional view showing the assembly of the first embodiment of the lighting device of the present invention. 2 is a perspective assembled view of the light engine of FIG. 1. FIG. 3 is a perspective assembled view of the light engine shown in FIG. 2 viewed from another perspective. Figure 4 is a perspective view of the wind deflector and a portion of the lampshade in Figure i. Fig. 5 is a perspective view of a drain cover provided at the air inlet and the air outlet of Fig. i. ^ 6 is a three-dimensional diagram of the drainage hood shown in Figure 5 from another perspective. Figure 7 is a perspective view of a light engine in a second embodiment of the lighting device of the present invention. Figure 8 is a perspective view of the light engine shown in Figure 7 taken from another HI Q total age person. Figure 9 is a perspective view of the light engine used in Figure 7. Wind and part of the lampshade [Main component symbol description] Optical part 10 Light source 11 Illuminant 112 Light exit channel 12 Light guide cover 122 Light engine 21, 51 Heat sink base 221, 521 Heat absorbing surface 223, 524 Flow path 225 Illumination device 100 Thermal substrate 111 Complex electrode 113 Light cup 121 Heat sink 20 Heat sink 22, 52 Fins 222, 522 Side 224 Groove 226 18 201002995 Flange 227 Fan 23 Circuit board 31 Lamp housing 40 Air inlet 411 Lamp cover 42, 54 Clearance 422 Flat 431 Cover Body 433 accommodating space 44 channel 45 convex surface 523 free end 228 electrical part 30 partition 32 lamp holder 41 air outlet 412 air guide 421 > 541 drainage cover 43 opening 432 convex cover 434 arrow 441 support joint 46 19