201113469 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種燈具，特別是一種嵌入於天花板以 提供室内或室外照明之燈具。 【先前技術】 習知嵌入式燈具結構，如中華民國公告第M359644 號「燈具散熱裝置」所示，係包含一基板、一環形散熱座 、一風扇及一殼蓋。該基板具有兩個表面，其中一表面設 有數個發光元件，另一表面係可結合該環形散熱座，且該 基板的兩個表面之間貫穿有數個氣孔，該風扇係裝設於該 環形散熱座上，該殼蓋則是罩設於該環形散熱座及風扇外 部並與該基板結合，令該基板設有發光元件之該表面呈朝 向外。由於該殼蓋上設有數個通氣槽，當風扇運轉時，可 驅使氣流經由各該通氣槽進入該殼蓋内部，通過該環形散 熱座之各散熱鰭片周邊後，再經由該基板之各氣孔吹出， 以達到對各該發光元件進行散熱之目的。 一般嵌入式燈具係嵌入於輕鋼架或裝潢隔層之天花 板，令其殼蓋埋入於該天花板上方，僅保留該基板設有發 光元件之該表面顯露於該天花板表面，因此，習知結構之 殼蓋的^通氣槽係位在該天花板上方。然而，該天花板上 =與建築物本身之水泥樓層板之間的空間一般為封閉，該 二門不易與外界空氣循環’且該空間中可能另設置有其它 物品（如管路、線路或隔熱材），進而影響其氣流流通效果 及散熱效能。 201113469 如前段所述，由於習知結構之散熱效能不佳，容易造 成該環形散熱座之積熱問題，導致各該發光元件所產生之 熱量無法順利排除，令各該發光元件及其晶片長時間處於 高溫環境而影響其使用壽命。而且，各該發光元件之晶片 過熱時會導致光衰，進而影響各該發光元件之發光效能。 【發明内容】 本發明之目的係提供一種燈具，可以提升該燈具之散 熱效能。 本發明之次一目的係提供一種燈具，可以延長該燈具 之使用壽命。 本發明之另一目的係提供一種燈具，可以避免造成光 衰，不影響該燈具之發光效能。 ， 根據本發明之燈具，係包含：一外罩，一端具有一第 一開口，且由該第一開口凹入有一第一容室；一内殼座， 一端具有一第二開口，且由該第二開口凹入有一第二容室 ，該内殼座係設置於該第一容室内，該第二開口與該第一 開口對位，且該外罩及内殼座之間具有間距以形成一氣流 通道，該内殼座另設有一通孔，該通孔連通該第一容室及 第二容室；一風扇，設置於鄰近該通孔處，該風扇具有二 氣流流通侧，該二氣流流通側係吸入及吹出氣流，使該氣 流通過該通孔；一散熱器，具有一底板，該底板之一面係 面向該風扇；及一發光元件，係設置於該底板之另一面。 【實施方式】 為讓本發明之上述及其他目的、特徵及優點能更明顯 201113469 易懂，下文特舉本發明之較佳實施例，並配合所附圖式， 作詳細說明如下： 請參照第1及2圖所示，係本發明第一實施例之燈具 ，該燈具係包含一外罩1、一内殼座2、一風扇3、一散熱 器4及一發光元件5。其中，該内殼座2係設置於該外罩1 内，且該外罩1及内殼座2之間形成有氣流通道A，該風 扇3係設置於鄰近該内殼座2之一通孔24，該散熱器4及 發光元件5則設置於該内殼座2内，令該風扇3運轉時， 可驅使氣流經由該通孔24於該氣流通道A及内殼座2内 部之間流通，以驅散該發光元件5所產生之熱能。 該外罩1之一端具有一第一開口 12,且由該第一開口 12凹入有一第一容室11，該第一開口 12之周緣可以朝向 外延伸一第一凸緣13。 該内殼座2之一端則具有一第二開口 22,且由該第二 開口 22凹入有一第二容室21，該第二開口 22之周緣亦可 朝向外延伸一第二凸緣23。其中，該内殼座2之外徑較佳 小於該外罩1之第一容室11内徑，該第二開口 22之形狀 較佳與該第一開口 12之形狀相同，且該第二開口 22内徑 小於該第一開口 12.内徑，令該内殼座2設置於該外罩1 之第一容室11中時，該第二開口 22係位於該第一開口 12 之範圍中。該内殼座2另設有一通孔24，該通孔24係貫 穿該内殼座2之外表面及該第二容室21之内壁面，以連通 該第一容室11及第二容室21。 另外，該外罩1及内殼座2之間設有一間隔件14,該 間隔件14可為肋條、支撐柱或擋牆等凸出之條狀、柱狀、 201113469 塊狀或片狀型式，且該間隔件14可設置於該第一容室11 之内壁内，亦可設置於該内殼座2之外表面，令該外罩1 及内殼座2組合時，可間隔支撐其間形成一間距。本實施 例中，該間隔件14係選擇於該第一容室11之内周壁設置 數道肋條，各該肋條係抵頂於該内殼座2之外表面，以間 隔支撐該外罩1及内殼座2之間形成該間距。 該風扇3較佳設置於該内殼座2鄰近該通孔24處， 以驅使氣流通過該通孔24，且該風扇3具有二氣流流通侧 ，該二氣流流通侧係為一入風侧31及一出風側32。 該散熱器4較佳係以具高導熱係數之材質製成，且該 散熱器4具有一底板41，該底板41之其中一面設有數個 散熱鰭片42。 該發光元件5具有一基板51及數個發光體52，各該 發光體52較佳選擇為發光二極體，且各該發光體52係設 置於該基板51之其中一面。 再參照第1及2圖所示，本發明第一實施例之燈具組 裝時，該内殼座2係設置於該外罩1之第一容室11内，使 該内殼座2之第二開口 22與該外罩1之第一開口 12對位 ，並使該第二開口 22位於該第一開口 12之範圍中。該外 罩1及内殼座2之間藉由呈數道肋條型式之間隔件14支撐 而具有間距以形成一氣流通道A，且該第一凸緣13及第二 凸緣23之間亦可藉由該間隔件14支撐而形成一通氣口 B ，使得該燈具以外之外界空氣可經由該通氣口 B與該燈具 内部之氣流通道A相互流通。 該風扇3.係可設置於該内殼座2鄰近該通孔24處， 201113469 亦可直接設置於該通孔24中，使該風扇3其中一氣流流通 側係連接該氣流通道A，另一氣流流通側係連接該第二容 至21，以驅使氣流可經由該通孔24於該氣流通道a及第 二容室21之間流通。本實施例中，該風扇3係設置於該内 殼座2之内表面鄰近該通孔24處，並選擇以該入風側31 連接該氣流通道A，以該出風側32連接該第二容室21， 以驅使氣流自該通氣口 B被吸入’並經由該氣流通道a及 通孔24流向該第二容室21。 該散熱器4係設置於該第 谷至以円，且該散熱亞外 底板41設有散熱鰭片42之該面較佳面向該風扇3之出風 側32。另外，該散熱器4之各散熱鰭片A可平均分布於 該底板，或如本實施例所示，各該散熱‘鰭片42係圍繞 設置於該底板41外周，令各該散_片42之間形成一组 裝空間以供設置該風扇3。 該發无兀件5之基板 你故置於該散熱器4底板4 未設置散熱鰭片42之另一面，今久4八土 μ ' 7各忒發光體52面向該| 二開口 22。而且’該内殼座2之筮—叫 、 <弟一開口 22可另設置一 罩板25，該罩板25較佳騎_不透明之可透光板體 且該罩板25設有數個穿孔251，久访货Λ 胃 各该穿孔251較佳位於言 罩板25之周邊。 參照第2圖所示，本發明第— ^ a加*例之燈具實施時 該外罩1係埋入於天花板9上方，入 、 外罩1之第一凸今 13貼抵於該天花板9表面。當風扇 3運轉時，可驅使氣 經由該通孔24於該氣流通道a及笛—' ^ 、 禾—谷至21之間流通 並同時使該氣流通過該散熱器4周遙，，、， 门還以輔助驅散該發i 201113469 元件5所產生之熱能。而且，本發明可藉由控制該風扇3 之順、逆旋轉方向，以改變該氣流之流通方向。例如，當 風扇3順向旋轉時，係驅使該氣流自該通氣口 B及氣流通 道A被吸人，並經由該通孔24流向該第二容室21之散熱 器4周邊，再由該罩板25之各穿孔251排出。反之，當風 扇3逆向旋轉時，則驅使該氣流自該罩板25之各穿孔251 被吸入，且通過該第二容室21之散熱器4周邊後，並依序 經由該通孔24、氣流通道A及通氣口 B排出，以輔助驅 散該發光元件5所產生之熱能。 然而，無論該氣流之流通方向為何，本發明之通氣口 B及各該穿孔251均凸露於天花板9之表面，可與外界空 氣順暢循環。且該内殼座2之第二凸緣23係阻隔於該通氣 口 B及各該穿孔251之間，可避免該燈具所排出之熱氣又 立即被回吸進入燈具中，以提供較佳之氣流流通效果及散 熱效能。 . 請參照第3圖所示，係本發明第二實施例之燈具，該 燈具亦包含一外罩1’、一内殼座6、一風扇3’、一散熱器 4’及一發光元件5。 相較於前述第一實施例，本第二實施例係進一步於該 内殼座6上設置有數個通孔64，該風扇3’則鄰近設置於各 該通孔64處，且該風扇3’較佳設置於各該通孔64之間， 以驅使氣流可經由各該通孔64於該氣流通道A及第二容 室61之間流通。該内殼座6另具有一導風罩65，該導風 罩65係為一盤狀體，該導風罩65中央設有一組裝孔651 ，該組裝孔651係可供容設該風扇3’，該導風罩65之外f 201113469 周緣係呈彎弧狀向外延伸，以利於該風扇3,入風及出風之 順暢性，該導風罩65之外周緣係結合於該内殼座6，且各 該通孔64係位於該導風罩65結合該内殼座6時所罩覆之 範圍内。 另外，本第二實施例之外罩Γ及内殼座6之間亦設有 一間隔件66，該間隔件66係選擇於該内殼座6之第二凸 緣63設置數個支撐柱，各該支撐柱係抵頂於該外罩Γ之 第一凸緣13’，以間隔支撐於該外罩Γ及内殼座6之間而 形成一間距。 再參照第3及4圖所示，本發明第二實施例之燈具組 裝時，該内殼座6亦設置於該外罩Γ之第一容室11’内， 使該内殼座6之第二開口 62與該外罩Γ之第一開口 12’對 位，並使該第二開口 62位於該第一開口 12’之範圍中。該 外罩Γ及内殼座6之間藉由呈數支撐柱型式之間隔件66 支撐而具有間距以形成一氣流通道A，並使該第一凸緣13’ 及第二凸緣63之間形成一通氣口 B。 該風扇3’係設置於導風罩65上，該散熱器4’則設置 於該内殼座6上，且該散熱器4’底板41’設有散熱鰭片42’ 之該面較佳面向該風扇3’。該發光元件5之基板51係設 置於該散熱器4’底板41’未設置散熱鰭片42’之另一面，令 各該發光體52面向該第二開口 62。 參照第4圖所示，本發明第二實施例之燈具實施時， 該外罩Γ亦埋入於天花板9上方，令該外罩Γ之第一凸緣 13’貼抵於該天花板9表面。當風扇3’運轉時，同樣可驅使 氣流經由各該通孔64於該氣流通道A及第二容室62之間 201113469 流通，並同時使該氣流通過該散熱器4’周邊，以輔助驅散 該發光元件5所產生之熱能。因此，本第二實施例除了提 供較佳之氣流流通及散熱效能外，更進一步有利於該風扇 3’入風及出風之順暢性。 請參照第5圖所示，係本發明第三實施例之燈具，該 燈具亦包含一外罩1”、一内殼座2’、一風扇3’、一散熱器 4’及一發光元件5。相較於前述第二實施例，本第三實施 例内殼座2’之第二開口 21’周緣亦朝向外延伸有一第二凸 緣22’，惟，該第二凸緣22’外周緣係結合於該外罩1”之第 一開口 11’’端緣，以封閉該外罩Γ’之第一開口 11”。該外 罩1”及内殼座2’之間同樣具有間距而形成有一氣流通道A ，且該外罩1”之外表面鄰近該第一開口 11”處設有數個通 氣孔12”。 本發明第三實施例之燈具實施時，該外罩1”亦埋入於 天花板9上方，令該外罩1”設有通氣孔12”之該段呈凸出 於該天花板9表面。當風扇3’運轉時，係可驅使氣流經由 各該通氣孔12”及氣流通道A被吸入，且流通過該散熱器 4’周邊後，再經由各該通孔23’吹出，以輔助驅散該發光元 件5所產生之熱能。由於，本第三實施例之第一開口 11’’ 係被該第二凸緣22’所封閉，具有較佳之整體美觀效果。 請參照第6及7圖所示，係本發明第四實施例之燈具 ，該燈具亦包含一外罩7、一内殼座8、一風扇3、一散熱 器4及一發光元件5。相較於前述第一實施例，本第四實 施例之外罩7的第一凸緣73與該内殼座8之第二凸緣83 係相互貼接，令該第二凸緣83呈封閉於該外罩7之第一開[s] 201113469 口 72。 該外罩7及内殼座8之間設有間隔件74、85，該間隔 · 件74、85係於該外罩7之第一容室71内周壁及該内殼座 8外表面均分別設置有一擋牆，該二擂牆係分別抵頂於該 外罩7第一容室71之内周壁及該内殼座8之外表面，以間 隔支撐該外罩7及内殼座8之間具有一間距而形成一氣流 通道A。 本實施例中，呈擋牆型式之該二間隔件74、85係呈 相互貼接，並將該氣流通道A區隔成一第一通道A1及一鲁 第二通道A2。其中，該内殼座8亦具有一通孔84，該通 孔84係連接該第一通道A1，令該第一通道A1可經由該 通孔84連通至該第二容室81。該内殼座8另設有數個穿 槽86，各該穿槽86係連接該第二通道A2，令該第二通道 A2可經由各該穿槽86連通至該第二容室81。再者，該内 殼座8之第二凸緣83設置有數個第一風孔87a及數個第二 風孔87b，各該第一風孔87a係連接該第一通道A1，各該 第二風孔87b係連接該第二通道A2。 _ 當風扇3運轉時，可驅使氣流經由各該第一風孔87a 吸入，並依序通過該第一通道A1、該通孔84、該第二容 室81、各該穿槽86及該第二通道A2後，再由各該第二風 孔87b吹出。或控制該風扇3呈反方向運轉時，可驅使氣 . 流反向經由各該第二風孔87b吸入，並依序通過該第二通 · 道A2、各該穿槽86、該第二容室81、該通孔84及該第一 通道A1後，再由各該第一風孔87a吹出，以對該發光元 件5進行散熱。 ——12—— 201113469 各該第一風孔87a及第二風孔87b亦可選擇設置於該 外罩7之外表面鄰近該第—開口 72 4，且各該第一風 87a亦連接該第一通道八丨，各該第二風孔8几亦連接該第 广H A2’同樣可利用該風扇3驅動氣流依前段所述之路 ^^流通。 好，者°玄内Λ又座8之第二容室81内可增設一隔板88 ’ ^板88係將該第二容室81 1隔為—上容室…及— 下谷=81b，且該通孔84及各該通槽％係連通該上容室 81a°遠搞板88具有一萝畔;^丨，兮s义止一，， 、令H 881，该發先兀件5之各發 &佳係經由該裝設孔881 s向該下容室叫。該内 双坐之第二開口 82可另設置有一罩板卯，該罩 佳為透明或不透明之可透綠體，因此，該發光 = 發光體以其⑸不會接_料空氣，㈣免堆積灰塵 ，上所述，本發，燈具之外罩埋人於天花板上 方時 其通乳π及各該穿孔均位在該天花板之底面，可灭介 亂順暢_，以提錢流流通效果及賴效能”工 祕Γ發具之氣流流通效果及散熱效能較佳，可將各 ^。辑所產生之熱量糊排除，可延長該燈具之使用 排除本之f具可將各料光元件職生之熱量順利 響該燈狀發纽能。 ^以，不影 然其並非用 發明之精神r 隹本龟明已利用上述較佳實施例揭示， 乂限疋本發明’任何熟習此技藝者在不脫離本 —13—— 201113469 和範圍之内，相對上述實施例進行各種更動與修改仍屬本 發明所保護之技術範疇，因此本發明之保護範圍當視後附 之申請專利範圍所界定者為準。 201113469 【圖式簡單說明】 第1圖：本發明第一實施例之立體分解圖。 第2圖：本發明第一實施例之組合剖面圖。 第3圖：本發明第二實施例之立體分解圖。 第4圖：本發明第二實施例之組合剖面圖。 . 第5圖：本發明第三實施例之組合剖面圖。 第6圖：本發明第四實施例之立體分解圖。 第7圖：本發明第四實施例之組合剖面圖。 【主要元件符號說明】 1 外罩 11 第一容室 12 第一開口 13 第一凸緣 14 間隔件 1， 外罩 11， 第一容室 12, 第一開口 13, 第一凸緣 1” 外罩 11，， 第一開口 12” 通氣孔 2 内殼座 21 第二容室 22 第二開口 23 第二凸緣 24 通孔 25 罩板 251 穿孔 T 内殼座 21， 第二開口 22, 第二凸緣 23, 通孔 3 風扇 31 入風側 15 — 201113469 32 出風側 3， 風扇 4 散熱器 42 散熱鰭片 4， 散熱器 42, 散熱鰭片 5 發光元件 52 發光體 6 内殼座 62 第二開口 64 通孔 651 組裝孔 7 外罩 72 第一開口 74 間隔件 8 内殼座 81a 上容室 82 第二開口 84 通孔 86 穿槽 87b 第二風孔 881 裝設孔 9 天花板 A 氣流通道 A2 第二通道 41 底板 41’底板 51 基板 61 第二容室 63 第二凸緣 65 導風罩 66 間隔件 71 第一容室 73 第一凸緣 81 第二容室 81b下容室 83 第二凸緣 85 間隔件 87a第一風孔 88 隔板 89 罩板 A1 第一通道 B 通氣口201113469 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a luminaire, and more particularly to a luminaire embedded in a ceiling for providing indoor or outdoor illumination. [Prior Art] The conventional embedded lamp structure, as shown in the Republic of China Announcement No. M359644 "Lamp Heat Dissipating Device", comprises a substrate, an annular heat sink, a fan and a cover. The substrate has two surfaces, one surface is provided with a plurality of light-emitting elements, the other surface is coupled to the annular heat-dissipating base, and a plurality of air holes are formed between the two surfaces of the substrate, and the fan is mounted on the annular heat-dissipating In the seat, the cover is disposed outside the annular heat sink and the fan and combined with the substrate, so that the surface of the substrate provided with the light-emitting element faces outward. Since the cover is provided with a plurality of venting slots, when the fan is in operation, the airflow can be driven into the inside of the cover through the venting slots, through the periphery of each of the heat dissipating fins, and then through the vents of the substrate. Blowing out to achieve the purpose of dissipating heat from each of the light-emitting elements. Generally, the embedded lamp is embedded in the ceiling of the light steel frame or the decorative partition, so that the cover is embedded above the ceiling, and only the surface of the substrate provided with the light-emitting element is exposed on the ceiling surface. Therefore, the conventional structure The venting groove of the cover is above the ceiling. However, the space between the ceiling = the concrete floor panel of the building itself is generally closed, the two doors are not easily circulated with the outside air' and there may be other items (such as pipes, lines or insulation materials) in the space. ), which in turn affects its airflow and heat dissipation. 201113469 As mentioned in the previous paragraph, due to the poor heat dissipation performance of the conventional structure, the heat accumulation problem of the annular heat sink is easily caused, and the heat generated by each of the light-emitting elements cannot be smoothly eliminated, so that the light-emitting elements and their wafers are prolonged for a long time. It is in a high temperature environment and affects its service life. Moreover, when the wafer of each of the light-emitting elements is overheated, light decay is caused, thereby affecting the light-emitting efficiency of each of the light-emitting elements. SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp that can improve the heat dissipation performance of the lamp. A second object of the present invention is to provide a luminaire that extends the life of the luminaire. Another object of the present invention is to provide a luminaire that avoids light fading and does not affect the luminous efficacy of the luminaire. The lamp according to the present invention comprises: a cover having a first opening at one end and a first cavity recessed by the first opening; an inner casing having a second opening at one end and The second opening is recessed into a second chamber, the inner housing is disposed in the first housing, the second opening is aligned with the first opening, and the outer cover and the inner housing are spaced apart to form an air flow a passage, the inner casing is further provided with a through hole, the through hole communicates with the first chamber and the second chamber; a fan is disposed adjacent to the through hole, the fan has two airflow sides, and the two air flows The side system draws in and blows out the airflow to pass the airflow through the through hole; a heat sink has a bottom plate, one surface of the bottom plate faces the fan; and a light emitting element is disposed on the other side of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the description of the appended claims. 1 and 2 show a lamp according to a first embodiment of the present invention. The lamp comprises a cover 1, an inner casing 2, a fan 3, a heat sink 4 and a light-emitting element 5. The inner casing 2 is disposed in the outer casing 1 , and an air flow passage A is formed between the outer casing 1 and the inner casing 2 , and the fan 3 is disposed adjacent to the through hole 24 of the inner casing 2 . The heat sink 4 and the light-emitting element 5 are disposed in the inner casing 2, so that when the fan 3 is in operation, the airflow can be driven to flow between the airflow passage A and the inner casing 2 via the through hole 24 to disperse the airflow. The heat energy generated by the light-emitting element 5. One end of the outer cover 1 has a first opening 12, and a first chamber 11 is recessed from the first opening 12. The circumference of the first opening 12 can extend outwardly from the first flange 13. One end of the inner casing 2 has a second opening 22, and a second chamber 21 is recessed from the second opening 22. The circumference of the second opening 22 can also extend outwardly from the second flange 23. The outer diameter of the inner casing 2 is preferably smaller than the inner diameter of the first chamber 11 of the outer cover 1. The shape of the second opening 22 is preferably the same as the shape of the first opening 12, and the second opening 22 is The inner diameter is smaller than the inner diameter of the first opening 12. When the inner casing 2 is disposed in the first chamber 11 of the outer cover 1, the second opening 22 is located in the range of the first opening 12. The inner casing 2 is further provided with a through hole 24 extending through the outer surface of the inner casing 2 and the inner wall surface of the second chamber 21 to communicate the first chamber 11 and the second chamber. twenty one. In addition, a spacer 14 is disposed between the outer cover 1 and the inner housing 2, and the spacer 14 can be a protruding strip, a column, a 201113469 block or a sheet type, such as a rib, a support column or a retaining wall, and The spacer 14 can be disposed in the inner wall of the first chamber 11 or on the outer surface of the inner housing 2 so that the outer cover 1 and the inner housing 2 can be spaced apart to form a space therebetween. In this embodiment, the spacer 14 is selected from the inner peripheral wall of the first chamber 11 to provide a plurality of ribs, each of the ribs abutting against the outer surface of the inner housing 2 to support the outer cover 1 and the inner portion. This spacing is formed between the housings 2. The fan 3 is preferably disposed adjacent to the through hole 24 of the inner casing 2 to drive airflow through the through hole 24, and the fan 3 has two airflow sides, and the airflow side is an air inlet side 31. And a wind side 32. The heat sink 4 is preferably made of a material having a high thermal conductivity, and the heat sink 4 has a bottom plate 41. One side of the bottom plate 41 is provided with a plurality of heat dissipating fins 42. The light-emitting element 5 has a substrate 51 and a plurality of light-emitting bodies 52. Each of the light-emitting elements 52 is preferably a light-emitting diode, and each of the light-emitting elements 52 is disposed on one side of the substrate 51. Referring to FIGS. 1 and 2, when the lamp of the first embodiment of the present invention is assembled, the inner casing 2 is disposed in the first chamber 11 of the outer cover 1 to make the second opening of the inner casing 2 22 is aligned with the first opening 12 of the outer cover 1 and the second opening 22 is located in the range of the first opening 12. The outer cover 1 and the inner casing 2 are supported by a plurality of rib-type spacers 14 to have a space to form an air flow passage A, and the first flange 13 and the second flange 23 can also be borrowed between Supported by the spacer 14 is formed a vent B such that outside the luminaire outside the luminaire can circulate through the vent B with the air flow passage A inside the luminaire. The fan 3. The fan 3 can be disposed adjacent to the through hole 24, and the 201113469 can be directly disposed in the through hole 24, so that one of the airflow side of the fan 3 is connected to the airflow channel A, and the other is The air flow side connects the second volume 21 to drive airflow through the through hole 24 between the air flow channel a and the second chamber 21. In this embodiment, the fan 3 is disposed on the inner surface of the inner casing 2 adjacent to the through hole 24, and is connected to the air inlet side 31 to connect the air flow passage A, and the air outlet side 32 is connected to the second air outlet side 32. The chamber 21 is configured to drive the airflow to be drawn in from the vent B and to flow through the airflow passage a and the through hole 24 to the second chamber 21. The heat sink 4 is disposed in the valleys to the valleys, and the surface of the heat dissipation sub-floor 41 on which the heat dissipation fins 42 are disposed preferably faces the air outlet side 32 of the fan 3. In addition, the heat dissipating fins A of the heat sink 4 can be evenly distributed on the bottom plate, or as shown in the embodiment, each of the heat dissipating fins 42 is disposed around the outer periphery of the bottom plate 41, so that each of the dispersing sheets 42 An assembly space is formed between the fans 3 for setting. The substrate of the hairless member 5 is placed on the other side of the heat sink 4 bottom plate 4 where the heat dissipation fins 42 are not disposed. The illuminant 52 of the quaternary body is facing the |two opening 22. Moreover, the cover of the inner casing 2 can be additionally provided with a cover plate 25, which is preferably oscillating opaque transparent plate and having a plurality of perforations. 251, long-term visit to the Λ The perforations 251 of the stomach are preferably located around the cover plate 25. Referring to Fig. 2, in the case of the lamp of the first embodiment of the present invention, the cover 1 is embedded above the ceiling 9, and the first projection of the cover and the cover 1 is attached to the surface of the ceiling 9. When the fan 3 is in operation, the gas can be driven to flow through the through hole 24 between the air flow passage a and the flute - '^, Wo-Valley to 21 and simultaneously pass the airflow through the radiator 4, It also assists in dissipating the thermal energy generated by the element 5 of 201113469. Moreover, the present invention can change the flow direction of the air flow by controlling the forward and reverse rotation directions of the fan 3. For example, when the fan 3 rotates in the forward direction, the airflow is driven from the vent B and the airflow passage A, and flows through the through hole 24 to the periphery of the radiator 4 of the second chamber 21, and then the cover Each of the perforations 251 of the plate 25 is discharged. On the contrary, when the fan 3 rotates in the reverse direction, the airflow is driven from the perforations 251 of the cover plate 25, and passes through the periphery of the radiator 4 of the second chamber 21, and sequentially passes through the through holes 24 and the airflow. Channel A and vent B are exhausted to assist in dissipating the thermal energy generated by the illuminating element 5. However, regardless of the direction of flow of the air stream, the vent B of the present invention and each of the perforations 251 are exposed on the surface of the ceiling 9 to smoothly circulate with the outside air. The second flange 23 of the inner casing 2 is blocked between the vent B and each of the through holes 251 to prevent the hot air discharged from the lamp from being immediately sucked back into the lamp to provide better airflow. Effect and heat dissipation. Referring to Fig. 3, a lamp according to a second embodiment of the present invention, the lamp also includes a cover 1', an inner casing 6, a fan 3', a heat sink 4' and a light-emitting element 5. Compared with the foregoing first embodiment, the second embodiment further includes a plurality of through holes 64 disposed on the inner casing 6, the fan 3' is disposed adjacent to each of the through holes 64, and the fan 3' Preferably, it is disposed between each of the through holes 64 to drive the airflow to flow between the air flow channel A and the second chamber 61 via the through holes 64. The inner casing 6 further has an air guiding cover 65. The air guiding cover 65 is a disk-shaped body. The air guiding cover 65 is provided with an assembly hole 651 at the center. The assembly hole 651 is for receiving the fan 3'. The outer edge of the air hood 65 f 201113469 extends outward in a curved shape to facilitate the smoothness of the fan 3, the wind and the wind, and the outer periphery of the air hood 65 is coupled to the inner casing. 6. Each of the through holes 64 is located within a range covered by the air hood 65 when the inner casing 6 is coupled. In addition, a spacer 66 is disposed between the outer cover and the inner housing 6 of the second embodiment. The spacer 66 is selected from the second flange 63 of the inner housing 6 to provide a plurality of support columns. The support column is abutted against the first flange 13' of the outer cover, and is spaced apart between the outer cover and the inner housing 6 to form a spacing. Referring to FIGS. 3 and 4, when the lamp of the second embodiment of the present invention is assembled, the inner casing 6 is also disposed in the first chamber 11' of the outer casing, so that the inner casing 6 is second. The opening 62 is aligned with the first opening 12' of the outer cover and the second opening 62 is located in the range of the first opening 12'. The outer cover and the inner casing 6 are supported by a plurality of spacers 66 supported by a plurality of support columns to form an air flow passage A and form a gap between the first flange 13' and the second flange 63. A vent B. The fan 3' is disposed on the air hood 65, and the heat sink 4' is disposed on the inner casing 6, and the heat sink 4' is provided with a heat sink fin 42'. The fan 3'. The substrate 51 of the light-emitting element 5 is disposed on the other surface of the heat sink 4' bottom plate 41' where the heat-dissipating fins 42' are not disposed, so that the light-emitting bodies 52 face the second opening 62. Referring to Fig. 4, when the lamp of the second embodiment of the present invention is implemented, the cover Γ is also embedded above the ceiling 9, so that the first flange 13' of the cover 贴 is attached to the surface of the ceiling 9. When the fan 3' is in operation, the airflow can also be circulated through the through holes 64 between the airflow passage A and the second chamber 62, 201113469, and simultaneously pass the airflow through the periphery of the radiator 4' to assist in dispersing the airflow. The heat energy generated by the light-emitting element 5. Therefore, in addition to providing better airflow and heat dissipation performance, the second embodiment further facilitates the smoothness of the air inlet and outlet of the fan 3'. Referring to FIG. 5, a lamp according to a third embodiment of the present invention also includes a cover 1", an inner casing 2', a fan 3', a heat sink 4' and a light-emitting element 5. Compared with the foregoing second embodiment, the second opening 21' of the inner casing 2' of the third embodiment also has a second flange 22' extending outwardly. However, the outer periphery of the second flange 22' is The first opening 11'' is joined to the first opening 11'' of the outer cover 1" to close the first opening 11" of the outer cover 。'. The outer cover 1" and the inner housing 2' are also spaced apart to form an air flow passage A. And the outer surface of the outer cover 1" is provided with a plurality of vent holes 12" adjacent to the first opening 11". When the lamp of the third embodiment of the present invention is implemented, the outer cover 1" is also embedded above the ceiling 9, so that The section of the outer cover 1" provided with the venting opening 12" protrudes from the surface of the ceiling 9. When the fan 3' is in operation, the airflow can be driven through each of the vent holes 12" and the airflow passage A, and the flow passes through the periphery of the heat sink 4', and then blows through the through holes 23' to assist in dispersing the airflow. The thermal energy generated by the light-emitting element 5. Since the first opening 11'' of the third embodiment is closed by the second flange 22', it has a better overall aesthetic effect. Please refer to Figures 6 and 7. The lamp of the fourth embodiment of the present invention further includes a cover 7, an inner casing 8, a fan 3, a heat sink 4 and a light-emitting element 5. Compared with the first embodiment, the first The first flange 73 of the outer cover 7 and the second flange 83 of the inner casing 8 are attached to each other, so that the second flange 83 is closed to the first opening of the outer cover 7 [s] 201113469 a port 72. A spacer 74, 85 is disposed between the outer cover 7 and the inner casing 8, and the spacers 74, 85 are attached to the inner peripheral wall of the first chamber 71 of the outer cover 7 and the outer surface of the inner casing 8 A retaining wall is respectively disposed, and the two wall systems respectively abut against the inner peripheral wall of the first chamber 71 of the outer cover 7 and the outer surface of the inner shell 8 An air flow passage A is formed by spacing between the outer cover 7 and the inner casing 8 at intervals. In the embodiment, the two spacers 74, 85 in the form of a retaining wall are attached to each other, and the airflow is applied. The channel A is separated into a first channel A1 and a second channel A2. The inner casing 8 also has a through hole 84. The through hole 84 is connected to the first channel A1, so that the first channel A1 can be The through hole 84 is connected to the second chamber 81. The inner housing 8 is further provided with a plurality of slots 86, each of the slots 86 connecting the second channel A2, so that the second channel A2 can be worn through the second channel A2. The groove 86 is connected to the second chamber 81. Further, the second flange 83 of the inner casing 8 is provided with a plurality of first air holes 87a and a plurality of second air holes 87b, each of the first air holes 87a Connecting the first channel A1, each of the second air holes 87b is connected to the second channel A2. _ When the fan 3 is in operation, the airflow can be driven to be sucked through the first air holes 87a, and sequentially pass through the first channel. A1, the through hole 84, the second chamber 81, each of the through slots 86 and the second passage A2, and then blown out by the second air holes 87b. Or control the fan When the operation is performed in the reverse direction, the gas flow can be reversed through each of the second air holes 87b, and sequentially passed through the second air passage A2, each of the through slots 86, the second chamber 81, and the After the through hole 84 and the first channel A1 are blown out by the first air holes 87a, the light emitting element 5 is radiated. ——12——201113469 Each of the first air holes 87a and the second air holes 87b Optionally, the outer surface of the outer cover 7 is adjacent to the first opening 72 4, and each of the first winds 87a is also connected to the first channel eight, and each of the second air holes 8 is also connected to the wide H A2. 'The fan 3 can also be used to drive the airflow according to the path described in the previous paragraph. Well, the partition of the second chamber 81 of the Xuan Nei Λ Λ 可 可 可 88 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' The through hole 84 and each of the through grooves are connected to the upper chamber 81a. The board 88 has a slab; the 丨 丨 兮 义 , , 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令 令The hair & is called to the lower chamber via the mounting hole 881 s. The second opening 82 of the inner double seat may be further provided with a cover plate, which is preferably transparent or opaque, and is transparent to the green body. Therefore, the light emission=the light body does not receive the air (5), and (4) avoids the accumulation. Dust, as mentioned above, the hair, the outer cover of the lamp is buried above the ceiling, and the perforation π and each of the perforations are located on the bottom of the ceiling, which can be used to eliminate the messy flow. The airflow effect and heat dissipation efficiency of the workman's hairpin are better, and the heat paste generated by each of the series can be excluded, and the use of the lamp can be extended to exclude the heat of the light component of the material. It is not obvious that it is not the spirit of the invention. The 龟本龟明 has been disclosed by the above-described preferred embodiments, and is not limited to the present invention. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 [Simple diagram BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective exploded view of a first embodiment of the present invention. Fig. 2 is a perspective sectional view showing a first embodiment of the present invention. Fig. 3 is an exploded perspective view of a second embodiment of the present invention. A cross-sectional view of a second embodiment of the present invention. Fig. 5 is a cross-sectional view showing a combination of a third embodiment of the present invention. Fig. 6 is an exploded perspective view of a fourth embodiment of the present invention. A cross-sectional view of a combination of four embodiments. [Description of main components] 1 housing 11 first chamber 12 first opening 13 first flange 14 spacer 1, outer cover 11, first chamber 12, first opening 13, first a flange 1" outer cover 11, first opening 12" vent 2 inner housing 21 second chamber 22 second opening 23 second flange 24 through hole 25 cover plate 251 perforation T inner housing 21, second Opening 22, second flange 23, through hole 3 fan 31 air inlet side 15 — 201113469 32 air outlet side 3, fan 4 heat sink 42 heat sink fin 4, heat sink 42, heat sink fin 5 light emitting element 52 illuminator 6 Inner housing 62 second opening 64 through hole 651 assembly Hole 7 Cover 72 First opening 74 Spacer 8 Inner housing 81a Upper chamber 82 Second opening 84 Through hole 86 Through slot 87b Second air hole 881 Mounting hole 9 Ceiling A Air flow passage A2 Second passage 41 Base plate 41' Base plate 51 substrate 61 second chamber 63 second flange 65 air hood 66 spacer 71 first chamber 73 first flange 81 second chamber 81b lower chamber 83 second flange 85 spacer 87a first Air hole 88 partition 89 cover plate A1 first passage B vent
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