1376481 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’令其殼盍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 殼蓋的各通氣槽係位在該天花板上方。然而，該^板上 方與建築物本身之水泥樓層板之間的空間一般為封閉，該 空間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。 -~~ 4 — 1376481 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 —5 — 1376481 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 籲 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之形狀鲁 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、 —6 — 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具有二氣流流通側 ，該二氣流流通側係為一入風侧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， 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〜氣流流通侧係連接該第二容 室21，以驅使氣流可經由該通孔24於該氣流通道 二容室21之間流通。本實施例中’該風屬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3ι 連接該氣流通道A，以該出風側32連接該第二容室， 以驅使氣流自該通氣π B被吸人，並經由該氣流通道a及 通孔24流向該第二容室21。 該散熱ϋ 4係設置於該第二容f2l内，且該散熱器* 底板41設有散熱Μ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42可平均分布於 該底板41 ’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’令各該散熱鰭片42之間形成一= 裝空間以供設置該風扇3。 、 該發光元件5之基板51係設置於該散熱 未設置散熱鰭片42之另一面， 二開口 22。而且，該内殼座2 罩板25，該罩板25較佳為逯 且該罩板25設有數個穿孔251 罩板25之周邊。 器4底板41 令各該發光體52面向該第 之第二開口 22可另設置一 明或不透明之可透光板體， ，各該穿孔251較佳位於該 X月第一實施例之燈且#絲日本 該外罩1係埋人於天花板9,+ A 燈具一日守 上方，令該外罩1之第一& 13貼抵於該天花板9表面。杏 弟凸 經由該通孔24於該氣流通道^ 1運時’可驅使氣 旅同時使該氣流通過該21之間流 熟為4周邊，以輔助驅散該發 1376481 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被吸入，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 —9 — 順幅弧狀向外延伸，以利於該風扇3,入風及出風之 ^ 7| V風罩65之外周緣係結合於該内殼座6，且各 5¾通孑匕64你 1糸位於該導風罩65結合該内殼座6時所罩覆之 一間卩外，本第二實施例之外罩丨，及内殼座6之間亦設有 緣6^^ 66，該間隔件66係選擇於該内殼座6之第二凸 間隔支樓於該外罩1，及内殼座6之間而 叹置數個支撐柱，各該支撐柱係抵頂於該外罩1，之 弟一凸緣13,，以 形成一間距。 穿昉翏照第3及4圖所示，本發明第二實施例之燈具表 j内殼座6亦設置於該外罩1，之第一容室u，内 、又座6之第一開口 62與該外罩1，之第一開口 Gy 外罩並使5亥第二開口 62位於該第一開口 12,之範圍中。Ί 内殼座6之間藉由呈數支樓柱型式之間隔件t :具有間距以形成—氣流通道A，並使該第 及弟二凸緣63之間形成一通氣口 B。 、幻: 該風扇3’係設置於導風罩65上，該散熱器 ;該内殼座6上’城散熱ϋ 4,絲41，設有散熱餘 之該面較佳面向該風扇3’。該發光元件5之基板5l 置於該散熱器4’底板41，未設置散熱鰭片42,之另〜係毁 各該發光體52面向該第二開口 62。 场’令 參照弟4圖所示，本發明第二實施例之燈具實“ 該外罩Γ亦埋入於天花板9上方，令該外罩〗，之第包時， 13’貼抵於該天花板9表面。當風扇3,運轉時，同镊凸緣 氣流經由各該通孔64於該氣流通道a及第二容奮^嗨使 62 1376481 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25、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1”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 一]1 — 1376481 σ 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，該二擋牆係分別抵頂於該 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Α。 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。 籲 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、該通孔从及該第一 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 — 1376481 • 各該第一風孔87a及第二風孔87b亦可選擇設置於兮 外罩7之外表面鄰近該第一開口_ 72處，且各該第一風孔 87a亦連接該第一通道A1，各該第二風孔8几亦連接該第 二通道A2’同樣可利用該風扇3驅動氣流依前段所述之路 • 徑流通。 ' 再者，該内殼座8之第二容室81内可增設一隔板88 ，該隔板88係將該第二容室81區隔為一上容室81a及— 下容室81b，且該通孔84及各該通槽86係連通該上容室 81a。該隔板88具有一裝設孔881，該發光元件5之各發 光肢52較佳係經由5玄裝设孔§g 1面向該下容室81 b。該内 殼座8之第二開口 82可另設置有一罩板89，該罩板^較 佳為透明或不透明之可透光板體，因此，該發光元件5之 發光體52或其晶片不會接觸到外界空氣，以避免堆積灰塵 〇 如上所述，本發明燈具之外罩埋入於天花板上方時， • 其通氣口及各該穿孔均位在該天花板之底面，可與外^空 氣順暢循環，以提升氣流流通效果及散熱效能。、"二 本發明燈具之氣流流通效果及散熱效能較佳，可將各 ； 該發光元件所產生之熱量順利排除，可延長該燈具之使用 ； 哥命。 . 本發明之燈具可將各該發光元件所產生之熱量順利 排除，以避免各該發光元件之晶片過熱而導致 響該燈具之發光效能。 ^ 雖然本發明已利用上述較佳實施例揭示，然其並非用 以限定本發明，任何熟習此技藝者在不脫離本^明之精: ——13 — 1376481 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。1376481 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, a recessed luminaire is embedded in a ceiling of a light steel frame or a decorative partition, so that its shell is embedded above the ceiling, and only the surface of the substrate on which the light-emitting element is disposed is exposed on the ceiling surface. Therefore, the conventional structure Each of the venting slots of the cover is positioned above the ceiling. However, the space between the top of the board and the concrete floor panel of the building itself is generally closed, the space is not easy to circulate with the outside air, and other items (such as pipes, lines or insulation materials) may be provided in the space. ), which in turn affects its airflow and heat dissipation. -~~ 4 — 1376481 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 are respectively eliminated. Its wafers are exposed to high temperatures for a long time and affect their 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. - Referring to Figures 1 and 2, a lamp _ according to a first embodiment of the present invention includes a housing 1, an inner housing 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 wind 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 through the through hole 24. To dissipate 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 The inner diameter of the second opening 12 is smaller than the inner diameter of the first opening 12. The inner opening 2 is disposed in the first housing 11 of the outer cover 1 , and 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 casing 2, and the spacer 14 can be a rib, a column or a retaining wall, such as a strip, a column, a 6-block or a sheet. 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. spacing. 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 can be disposed adjacent to the through hole 24 of the inner casing 2, or can be directly disposed in the through hole 24, such that one of the airflow side of the fan 3 is connected to the airflow passage A, and the airflow is circulated. The side is connected to the second chamber 21 to drive airflow through the through hole 24 to circulate between the air passage two chambers 21. In the present embodiment, the wind 3 is disposed on the inner surface of the inner casing 2 adjacent to the through hole 24, and is connected to the air flow passage A by the air inlet side 3, and the air outlet side 32 is connected to the air outlet side 32. The second chamber is configured to drive the airflow to be sucked from the ventilation π B and flow to the second chamber 21 via the air flow passage a and the through hole 24 . The heat sink 4 is disposed in the second capacitor f2l, and the surface of the heat sink* bottom plate 41 on which the heat sink fins 42 are disposed preferably faces the air outlet side 32 of the fan 3. In addition, the heat dissipation fins 42 of the heat sink 4 can be evenly distributed on the bottom plate 41 ′ or the heat dissipation fins 42 are disposed around the outer periphery of the bottom plate 41 as shown in this embodiment. A = space is formed between them for setting the fan 3. The substrate 51 of the light-emitting element 5 is disposed on the other surface of the heat-dissipating fin 42 and has two openings 22. Moreover, the inner casing 2 is a cover plate 25, the cover plate 25 is preferably 逯 and the cover plate 25 is provided with a plurality of perforations 251 around the cover plate 25. The bottom plate 41 of the device 4 is disposed such that the second opening 22 of the illuminator 52 is further provided with a transparent or opaque transparent plate, and each of the holes 251 is preferably located in the lamp of the first embodiment of the month #丝Japan The outer cover 1 is buried in the ceiling 9, and the + A lamp is placed above the day, so that the first & 13 of the outer cover 1 abuts against the surface of the ceiling 9. The apricot is conveyed through the through hole 24 in the air flow path to drive the airflow while passing the airflow through the periphery of the air to a periphery of 4 to assist in dissipating the heat generated by the element 1376481. 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 hood Each of the perforations 251 of 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 hood of the air hood 65 extends outwardly in an arc shape to facilitate the fan 3, and the outer edge of the air inlet and outlet hood 65 is coupled to the inner casing 6, And each of the 53⁄4 ports 64 is located between the outer cover of the second embodiment and the inner casing 6 The spacer 66 is selected from the second convex spacer of the inner casing 6 between the outer cover 1 and the inner casing 6, and a plurality of support columns are slid, each of the support columns Abutting the outer cover 1, the brother a flange 13, to form a spacing. Referring to Figures 3 and 4, the lamp housing j inner housing 6 of the second embodiment of the present invention is also disposed on the outer cover 1, the first chamber u, and the first opening 62 of the seat 6 And the first opening Gy of the outer cover 1, and the second opening 62 is located in the range of the first opening 12. Between the inner casings 6 is formed by a plurality of spacers t of a column type having a space to form an air flow passage A, and a vent B is formed between the second and second flanges 63. Fantasy: The fan 3' is disposed on the air hood 65, the heat sink; the inner casing 6 has a heat dissipation ϋ 4, and the wire 41 is provided with a heat dissipating surface preferably facing the fan 3'. The substrate 51 of the light-emitting element 5 is placed on the bottom plate 41 of the heat sink 4', and the heat-dissipating fins 42 are not disposed, and the light-emitting bodies 52 face the second opening 62. According to the second embodiment of the present invention, the illuminator of the second embodiment of the present invention is also embedded in the ceiling 9 so that the cover is attached to the surface of the ceiling 9 When the fan 3 is in operation, the same flange airflow flows through the through-holes 64 through the airflow passages a and the second capacitive passages 62 1376481, and simultaneously passes the airflow through the periphery of the radiator 4' The heat energy generated by the light-emitting element 5 is assisted to dissipate. 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'. The luminaire of the third embodiment of the present invention also includes a cover 1", an inner casing 25, 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" end edge of the outer cover 1" is coupled to the first opening 11" of the outer cover 1". The outer cover 1" and the inner casing 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 air passages 12" adjacent to the first opening 11". When the lamp of the third embodiment of the present invention is implemented, the cover 1" is also embedded above the ceiling 9, so that the section of the cover 1" provided with the vent hole 12" protrudes from the surface of the ceiling 9. When the fan 3' During operation, the airflow can be driven through each of the vent holes 12" and the air flow 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 light-emitting element 5 The heat generated. Since the first opening 11'' of the third embodiment is closed by the second flange 22', it has a better overall aesthetic effect. Referring to Figures 6 and 7, a lamp according to a fourth embodiment of the present invention also includes a cover 7, an inner casing 8, a fan 3, a heat sink 4 and a light-emitting element 5. Compared with the foregoing first embodiment, the first flange 73 of the outer cover 7 of the fourth embodiment and the second flange 83 of the inner casing 8 are attached to each other, so that the second flange 83 is closed. The first opening of the outer cover 7 is 1 - 1376481 σ 72. Between the outer cover 7 and the inner casing 8, spacers 74 and 85 are disposed. The spacers 74 and 85 are respectively disposed on the inner peripheral wall of the first chamber 71 of the outer cover 7 and the outer surface of the inner casing 8 respectively. a retaining wall, the two retaining walls respectively abut against the inner peripheral wall of the first chamber 71 of the outer cover 7 and the outer surface of the inner casing 8 to support the spacing between the outer cover 7 and the inner casing 8 at intervals An air flow passage Α is formed. In this embodiment, the two spacers 74, 85 in the form of a retaining wall are attached to each other, and the airflow passage A is partitioned into a first passage A1 and a second passage A2. The inner housing 8 also has a through hole 84. The through hole 84 is connected to the first passage A1, so that the first passage A1 can communicate with the second chamber 81 via the through hole 84. The inner casing 8 is further provided with a plurality of slots 86'. The through slots 86 are connected to the second passage A2, so that the second passage A2 can communicate with the second chamber 81 via the through slots 86. Furthermore, 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, and each of the first air holes 87a is connected to the first channel A1, and the second The air hole 87b is connected to the second passage A2. When the fan 3 is in operation, the airflow can be driven to inhale through each of the first air holes 87a and sequentially pass through the first passage A1, the through hole 84, the second chamber 81, each of the through slots 86, and the first After the two channels A2, they are blown out by the second air holes 87b. Or controlling the fan 3 to operate in the reverse direction, the gas flow can be reversely sucked through each of the second air holes 87b, and sequentially passed through the second passage A2, each of the through slots 86, and the second chamber 81. After the through hole is passed from the first channel A1, the first air hole 87a is blown out to dissipate heat from the light emitting element 5. The first air hole 87a and the second air hole 87b are also disposed on the outer surface of the outer cover 7 adjacent to the first opening _72, and each of the first air holes 87a is also connected to the first air hole 87a. A channel A1, each of the second air holes 8 is also connected to the second channel A2'. The fan 3 can also be used to drive the airflow according to the path and diameter described in the preceding paragraph. Further, a partition 88 may be added to the second chamber 81 of the inner casing 8, and the partition 88 partitions the second chamber 81 into an upper chamber 81a and a lower chamber 81b. The through hole 84 and each of the through grooves 86 communicate with the upper chamber 81a. The spacer 88 has a mounting hole 881, and each of the light-emitting members 52 of the light-emitting element 5 preferably faces the lower chamber 81b via a 5-hole mounting hole §g1. The second opening 82 of the inner casing 8 may be further provided with a cover plate 89. The cover plate is preferably a transparent or opaque transparent plate. Therefore, the illuminant 52 of the illuminating element 5 or its wafer does not Contacting the outside air to avoid accumulation of dust. As described above, when the outer cover of the lamp of the present invention is embedded in the ceiling, the vent hole and each of the perforations are located on the bottom surface of the ceiling, and the air can be smoothly circulated with the outside air. To improve airflow and heat dissipation. , "Two" of the invention, the airflow effect and heat dissipation performance of the lamp are better, and the heat generated by the light-emitting component can be smoothly eliminated, and the use of the lamp can be prolonged; The luminaire of the present invention can smoothly remove the heat generated by each of the illuminating elements to prevent the wafers of the illuminating elements from overheating and causing the illuminating performance of the illuminating unit. Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can carry out with respect to the above embodiments without departing from the spirit of the invention: 13-13376481. The various changes and modifications are still within the technical scope of the present invention, and the scope of the present invention is defined by the scope of the appended claims.
—14 — 1376481 【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 Γ 外罩 1Γ 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 2， 内殼座 2Γ 第二開口 22, 第二凸緣 23, 通孔 3 風扇 31 入風側 —15 — 1376481—14 — 1376481 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a first embodiment of the present invention. Fig. 2 is a sectional view showing the combination of the first embodiment of the present invention. Figure 3 is a perspective exploded view of a second embodiment of the present invention. Figure 4 is a sectional view showing the combination of the second embodiment of the present invention. Figure 5 is a sectional view showing the combination of the third embodiment of the present invention. Figure 6 is a perspective exploded view of a fourth embodiment of the present invention. Figure 7 is a sectional view showing the combination of the fourth embodiment of the present invention. [Main component symbol description] 1 outer cover 11 first chamber 12 first opening 13 first flange 14 spacer Γ outer cover 1 Γ first chamber 12, first opening 13, first 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 2, inner housing 2 Γ second opening 22, second flange 23 , through hole 3 fan 31 inlet side - 15 — 1376481
32 出風側 3， 風扇 4 散熱器 41 42 散熱鰭片 4， 散熱器 41， 42, 散熱鰭片 5 發光元件 51 52 發光體 6 内殼座 61 62 第二開口 63 64 通孔 65 651 組裝孔 66 7 外罩 71 72 第一開口 73 74 間隔件 8 内殼座 81 81a 上容室 81b 82 第二開口 83 84 通孔 85 86 穿槽 87a 87b 第二風孔 88 881 裝設孔 89 9 天花板 A 氣流通道 A1 A2 第二通道 B 底板 底板 基板 第二容室 第二凸緣 導風罩 間隔件 第一容室 第一凸緣 第二容室 下容室 第二凸緣 間隔件 第一風孔 隔板 罩板 第一通道 通氣口32 Outlet side 3, fan 4 Heat sink 41 42 Heat sink fin 4, Heat sink 41, 42, Heat sink fin 5 Light-emitting element 51 52 Light-emitting body 6 Inner housing 61 62 Second opening 63 64 Through-hole 65 651 Assembly hole 66 7 Cover 71 72 First opening 73 74 Spacer 8 Inner housing 81 81a Upper chamber 81b 82 Second opening 83 84 Through hole 85 86 Through slot 87a 87b Second air hole 88 881 Mounting hole 89 9 Ceiling A Airflow Channel A1 A2 Second Channel B Floor Plate Base Plate Second Chamber Second Flange Air Duct Spacer First Chamber First Flange Second Chamber Lower Chamber Second Flange Spacer First Air Hole Partition Cover plate first passage vent