200920997 * .九、發明說明： 【發明所屬之技術領域】 本發明涉及一種發光二極體照明裝置，特別係一種具 * 有較好散熱性能之發光二極體照明裝置。 【先前技術】 現如今，發光二極體（Light Emitting Diode, LED)已經 被廣泛應用到很多領域，在此，一種新型發光二極體可參 見 Daniel A. Steigerwald 等人於文獻 IEEE Journal on Selected Topics in Quantum Electronics, Vol. 8，No.2, March/April 2002 中的 Illumination With Solid State Lighting Technology —文。發光二極體一般可發出特定波長 的光，例如可見光，惟，發光二極體所接收能量的大約 80〜90%被轉換為熱量，其餘的能量才被真正轉換為光能。 因此，發光二極體發光所產生的熱量必須被疏散掉以保證 發光二極體的正常運作。 請參見圖1，美國專利第7，144，135號揭示了一種具有 散熱性能之發光二極體照明裝置10包括一外殼體11，一設 置於該外殼體11内部之内殼體12,該外殼體11與内殼體 12之間形成的空間作為空氣通道13。該外殼體11係一截 頂圓錐形，較大端部具有一開口 111，較小端部與一數模轉 換器15相連。該外殼體11之較小端部設置有複數個孔洞 16，該孔洞16用於進氣。該内殼體12之底部設置有一發 光二極體14，該發光二極體14的下方連接有一散熱鰭片 17，該散熱鰭片17位於該外殼體11與内殼體12之間形成 200920997 的空間。該散執轉g 7认土他 置有一馬逵Μ，、 运離該發光二極體14的—側設 及由馬達1 8驅動的風爲。哕g、查Ί β -Τ 收數模轉換器15所於…「:風扇19 4馬達18可接 所輸出的電壓來驅動該風扇19轉動，Ci ^該孔洞16吸人空氣並使空氣流過該散熱鰭片17及該通 L 13進而流出該發光二極體照明裝置.10,從而達到將哕發 光二極體14發光所產生的熱量疏散掉。 私 二：’:亥發光二極體照明裝置10所使用的馬達18會 ;9的:疋::上’不利於節約能源。另’該馬達18及風; 、增加該發光二極體照明裝置10出現故障的 風險。 【發明内容】 :下將以實施例說明—種具有較好散熱性能且耗能較 低的發光二極體照明裝置。 種發光二極 裝 ^ ± ，其包括一設置有空氣流ϋ 之第-设體’-空氣腔體及設置於該第一殼體内的至少一 發光二極體，該空氣腔體設置有至少一第一氣口及至少一 第二氣口，該至少一第一氣口與該空氣流道相連通，該至 ί口與该至少一第二氣口於重力方向上具有高度 ，以工氣腔體與該至少-發光二極體熱性連豸，用以吸 收該，少-發光二極體工作時所產生的熱量使空氣腔體内 的空氣沿與重力相反的方向上升，上升的空氣選擇性的經 由該至少一第一氣口或該至少一第二氣口流出。 相對於先前技術’該發光二極體照明裝置所包括的至 少一發光二極體產生的熱量傳入該空氣腔體中，使得該空 200920997 • 氣腔體中的溫度升高進而導致空氣腔體中的空氣上升，上 . 升的空氣可選擇性的經由該第一氣口或第二氣口流出至該 發光二極體照明裝置外，該空氣腔體亦會選擇性的經由該 第一氣口或第二氣口吸入空氣腔體外之空氣，從而將該至 少一發光二極體所產生的熱量疏散掉.，從而使該發光二極 體照明裝置不用消耗額外的能源即可具有較好散熱性能。 【實施方式】 下面結合附圖對本發明作進一步的詳細說明。 請參見圖2與圖3,本發明第一實施例提供之發光二極 體照明裝置20，其包括：一第一殼體200，一發光二極體 23，一空氣腔體24。 該第一殼體200包括一外殼體21及一内殼體22,該外 殼體21係一截頂的中空錐形結構，例如截頂的中空圓錐、 截頂的中空棱錐，其較大端部具有一開口 211，其較小端部 與該空氣腔體24相連。於本實施例中，該空氣腔體24與 該外殼體21之較小端部之内壁充分接觸。 該内殼體22為一反射體，其設置於該外殼體21之内 側。該外殼體21與内殼體22之間形成的空間25作為空氣 通道。 該發光二極體23設置於該内殼體22之由空氣腔體24 承載之底部，其包括一基底231及一發光部232，該基底 231與該空氣腔體24熱性連接。該發光二極體23所發出之 至少部分光線可經由該内殼體22反射並射出該發光二極體 照明裝置20，從而提高發光二極體23的光利用率。 9 200920997 該空氣腔體24包括一第一侧壁241，一與該第一側壁 241相對的第二側壁242，及位於該第一側壁241與第二侧 壁242之間的環形第三側壁243。該第一側壁241與該發光 二極體23之基底231熱性連接，該第二側壁242與一連接 部201相連。該連接部201可與外部插座相連。該環形第 三侧壁243與該外殼體21之較小端部相連，於第一侧壁241 與環形第三侧壁243之鄰接處設置有兩個第一氣口 244，於 第二側壁242與環形第三侧壁243之鄰接處設置有兩個第 二氣口 245，第一氣口 244該兩個第一氣口 244與該空間 25相連通。該第二氣口 245與第一氣口 244於重力方向G 上具有高度差。 可理解的是，該第一侧壁241與該發光二極體23之基 底231之間亦可塗覆導熱膠以利於熱傳導，該第一氣口 244 與第二氣口 245之有效截面積可相同；該第一氣口 244與 第二氣口 245的數量及設置位置可根據實際需要進行設 計，只要保證該第一氣口 244與第二氣口 245於重力方向 上具有高度差即可。 該發光二極體23發光所產生的熱量可傳遞到該空氣腔 體24中，利用自然通風（Natural Ventilation)原理將該空氣 腔體24中所吸收的熱量疏散掉，以實現對該發光二極體23 進行散熱之目的。 自然通風不像用風扇驅動力產生的通風作用，自然通 風係利用風力、浮力等自然力來實現通風換氣、降溫等目 的。浮力通風（Buoyancy Ventilation)可為溫度誘導 200920997 (Temperature-induced)或濕度誘導（Humidity-induced)。本實 施例中係利用溫度誘導的方式來實現通風，溫度誘導可用 以下運算式進行表徵： Q = C*A*[2gH(Ti-To)/Ti]Al/2 於此，Q為通風率（m3/s)，C為流量係數（0.65〜0.70)， A為進風口之有效截面積（m2)，其等於出風口之截面積，g 為重力加速度（9.807m/s2)，Η為進風口與處風口中點間之垂 直距離（m)，Ti為腔内或室内的平均溫度（Κ)，To為腔外或 室外之平均溫度（K)。 當該發光二極體照明裝置20工作時，其發光二極體23 產生的熱量可經由該空氣腔體24之第一側壁241傳入空氣 腔體24中，使得空氣腔體24中的溫度升高進而導致空氣 腔體24中的空氣上升，上升的空氣可經由兩個第一氣口 244流出至該空間25中。於空氣腔體24中的空氣上升的同 時，空氣腔體24亦會經由該兩個第二氣口 245吸入空氣腔 體24外之空氣。 由此可見，空氣腔體24中溫度較高的空氣可經由兩個 第一氣口 244流出至該空間25並最終排出該發光二極體照 明裝置20，同時空氣腔體24亦會經由該兩個第二氣口 245 吸入外部溫度較低的空氣，使得空氣腔體24中的空氣與其 外的空氣形成一循環系統以將發光二極體23所產生的熱量 疏散掉。該發光二極體照明裝置20係利用自然力來實現較 好的散熱性能，不需要額外的能源，所以耗能較低。 請參見圖4與圖5,本發明第二實施例提供之發光二極 11 200920997 體照明裝置30與第一實施例所提供之發光二極體照明裝置 20基本相同，其不同之處在於：發光二極體照明裝置30 之外殼體31與内殼體32之間形成的空間中形成有四個空 氣通道36;於空氣腔體34之第一側壁341與環形第三側壁 343之鄰接處設置有四個第一氣口 344，該四個第一氣口 344分別與該四個空氣通道36相連通；於第二侧壁342與 環形第三側壁343之鄰接處設置有四個第二氣口 345。 當該發光二極體照明裝置30之開口方向平行於重力方 向G設置時，該空氣腔體34中上升的空氣經由四個第一氣 口 344流出至該四個空氣通道36中，同時，空氣腔體34 會經由該四個第二氣口 345吸入空氣腔體34外之空氣。於 此，發光二極體照明裝置30係利用自然通風原理，並可於 不需要額外能源之情況下，將該空氣腔體34吸收的由發光 二極體33所產生的熱量疏散掉，以實現對該發光二極體33 進行散熱之目的。 可理解的是，當發光二極體照明裝置30相對重力方向 G具有不同的傾斜角度時，該空氣腔體34中上升的空氣會 選擇性的經由第一氣口 344與/或第二氣口 345流出，即上 升的空氣會經由於重力方向G上相對處於上方之第一氣口 344與/或第二氣口 345流出，使得該發光二極體照明裝置 30具有較好的散熱性能，以下將以該發光二極體照明裝置 30相對重力方向G的傾斜角度為90度為例進行說明。 請參見圖6,該空氣腔體34中上升的空氣可經由空氣 腔體34於重力方向G上相對處於上方之兩個第一氣口 344 12 200920997 及兩個第二氣口 345分別流出至該四個空氣通道36中及該 空氣腔體34外部，同時，空氣腔體34會經由於重力方向G 上相對處於下方之兩個第一氣口 344及兩個第二氣口 345 分別吸入空氣通道36外之空氣及空氣腔體34外之空氣， 從而將該空氣腔體34吸收的由發光二極體33所產生的熱 量疏散掉。由此可見，由於發光二極體照明裝置30相對重 力方向G的傾斜角度不同，該第一氣口 344與第二氣口 345 之進氣排氣功能會有所不同。 請參見圖7,本發明第三實施例提供之發光二極體照明 裝置40，其包括：一第一殼體400，一發光二極體43，一 空氣腔體44。 該第一殼體400包括一外殼體41及一内殼體42,該外 殼體41係一截頂的錐形結構，其較大端部具有一開口 411， 其較小端部與一螺紋型連接部401相連。該螺紋型連接部 401可連接至一通用的插座。該較小端部之侧壁設置有孔洞 412，該孔洞412用於進氣或出氣。 該内殼體42設置於該外殼體41之内部，且該内殼體 42與外殼體41之間形成的空間45作為空氣通道。該内殼 體42與外殼體41之間可設置有至少一支撐件402(圖中示 出兩個）以使内殼體42與外殼體41可相對固定。 該發光二極體43設置於該内殼體42之靠近螺紋型連 接部401之底部，其包括一基底431及一發光部432。 該空氣腔體44設置於該發光二極體43之上部並覆蓋 該發光二極體43，其包括一透光之第一側壁441，一與該 13 200920997 第一側壁441相鄰之環形第二側壁442，該第一側壁441 與該發光部432之出光面相對。該空氣腔體44之與第一側 壁441相對的一端具有一開口。該環形第二侧壁442之靠 近發光二極體43的一端與發光二極體43之基底431相連。 從而，由該空氣腔體44及發光二極體43之基底431圍成 一空間S，發光二極體43之發光部432設置於該空間S中。 於本實施例中，該空氣腔體44可為透明之或半透明 之，其第一侧壁441與環形第二側壁442之内侧可塗覆有 螢光粉或濾鏡。該空氣腔體44所用材質可為玻璃，壓克力 (PMMA)、聚苯醯胺（PPA)、環氧樹脂、矽膠等。可理解的 是，可僅將該第一侧壁441設置為透明之或半透明之。 該空氣腔體44之環形第二侧壁442相對靠近發光二極 體43的一端設置有第一氣口 443，相對遠離發光二極體43 的一端設置有第二氣口 444。該第一氣口 443貫穿該空氣腔 體44之環形第二侧壁442及内殼體42並分別與該空間S 及空間45相連通，該第二氣口 444貫穿該空氣腔體44之 環形第二側壁442及内殼體42並分別與該空間S及空間45 相連通。該第一氣口 443及第二氣口 444均可設置有空氣 過濾單元445，用以空氣過濾，從而較好的保護發光二極體 43使其免受污染。 當該發光二極體43發光時，其產生的熱量直接匯集於 該空氣腔體44内的空間S中，使得空間S中的溫度升高進 而導致空間S中的空氣上升，上升的空氣可經由第二氣口 444流出至該空間45中。於空間S中的空氣上升的同時， 14 200920997 . 空間S亦會經由該孔洞412及第一氣口 443吸入發光二極 — 體43外之空氣。 由此可見，空氣腔體44中溫度較高的空氣可經由第二 氣口 444流出至該空間45並最終排出該發光二極體照明裝 置40，同時空氣腔體44亦會經由該孔洞412及第一氣口 443吸入溫度較低的空氣，使得空氣腔體44内的空間S中 的空氣與其外的空氣形成一循環系統以將發光二極體4 3所 產生的熱量疏散掉。該發光二極體照明裝置40係利用自然 力來實現較好的散熱性能，不需要額外的能源，所以耗能 較低。 請參見圖8與圖9,本發明第四實施例提供之發光二極 體照明裝置50與第一實施例所提供之發光二極體照明裝置 20基本相同，其不同之處在於：發光二極體照明裝置50 包括一第一殼體500,該第一殼體500包括本體51、，設 置於本體51内側之反射膜59、及設置於本體51外側之四 % 個空氣通道52,該空氣通道52之外表面為圓弧形；於空氣 腔體54之第一侧壁541與環形第三侧壁543之鄰接處設置 有四個第一氣口 544，該四個第一氣口 544分別與該四個空 氣通道52相連通；於第二側壁542與環形第三側壁543之 鄰接處設置有四個第二氣口 545 ;該空氣腔體54中上升的 空氣經由四個第一氣口 544流出至該四個空氣通道52中， 同時，空氣腔體54會經由該四個第二氣口 545吸入空氣腔 體52外之空氣。於此，發光二極體照明裝置50係利用自 然通風原理，並可於不需要額外能源之情況下，將該空氣 15 200920997 腔體54吸收的由發光二極體53所產生的熱量疏散掉，以 實現對該發光二極體53進行散熱之目的。 請參見圖10，本發明第五實施例提供之發光二極體照 明裝置60與第一實施例所提供之發光二極體照明裝置20 基本相同，其不同之處在於： 發光二極體照明裝置60包括一中空支撐桿601及一基 座602，該中空支撐桿601可為剛性的亦可為柔性的，其一 端與該空氣腔體64相接合以支撐空氣腔體64、外殼體61、 内殼體62、發光二極體63等元件，其另一端與該基座602 相接合； 於空氣腔體64之第一側壁641與環形第三侧壁643之 鄰接處設置有四個第一氣口 644，該四個第一氣口 644分別 與該外殼體61與内殼體62之間形成的空間65相連通； 於第二側壁642上設置有第二氣口 645，該第二氣口 645之截面積大於該第一氣口 644之截面積； 該空氣腔體64中受熱上升的空氣經由第二氣口 645流 出至該中空支撐桿601中，帶有熱量之空氣進一步流經該 中空支撐桿601並經由該基座602上之排氣口 603排出。 同時，空氣腔體64會經由該第一氣口 644吸入該空間65 中的空氣。於此，發光二極體照明裝置60可作為臺燈來使 用，其係利用自然通風原理，並可於不需要額外能源之情 況下，將該空氣腔體64吸收的由發光二極體63所產生的 熱量疏散掉，以實現對該發光二極體63進行散熱之目的。 綜上所述，本發明確已符合發明專利之要件，遂依法 16 200920997 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係一種美國專利第7,144,135號揭示之發光二極體 照明裝置之截面示意圖。 圖2係本發明第一實施例發光二極體照明裝置之俯視 示意圖。 圖3係圖2中之發光二極體照明裝置沿ΙΠ_ΙΠ之截面 示意圖。 圖4係本發明第二實施例發光二極體照明裝置之俯視 示意圖。 圖5係圖4中之發光二極體照明裴置沿ν_ν之截面示 意圖。 圖6係圖4中之發光二極體照明裝置相對重力方向傾 斜90度之截面示意圖。 圖7係本發明第三實施例發光二極體照明裝置之截面 示意圖。 圖8係本發明第四實施例發光二極體照明裝置之俯視 示意圖。 圖9係圖8中之發光二極體照明裝置沿ιχ_Ιχ之截面 示意圖。 圖10係本發明第五實施例發光二極體照明裂置之截面 17 200920997 示意圖。 【主要元件符號說明】 發光二極體照明裝置 外殼體 内殼體 空氣通道 開口 發光二極體 數模轉換器 孔洞 散熱鰭片 馬達 風扇 空氣腔體 空間 本體 反射膜 第一殼體 連接部 基底 發光部 第一侧壁 第二側壁 第三侧壁 10 ， 20 ， 30 ， 40 ， 50 ， 60 11 ， 21 ， 31 ， 41 ， 61 12，2.2，32，42，62 13 ， 36 ， 52 111 ， 211 ， 411 14 ， 23 ， 33 ， 43 ， 53 ， 63 15 16 ， 412 17 18 19 24 ， 34 ， 44 ， 54 ， 64 25，45，65 51 59 200 ， 400 ， 500 201 231 ， 431 ， 602 232 241 ， 341 ， 441 ， 541 ， 641 242 ， 342 ， 442 ， 542 ， 642 243 ， 343 ， 543 ， 643 18 200920997 第一氣口 244， 344 ， 544 ， 443 ， 644 第二氣口 245， 345 ， 444 ， 545 連接部 401 支撐件 402 發光部 432 空氣過濾單元 445 中空支撐桿 601 基座 602 排氣口 603 19200920997 *. VENTION DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a light-emitting diode lighting device, and more particularly to a light-emitting diode lighting device having better heat dissipation performance. [Prior Art] Nowadays, Light Emitting Diode (LED) has been widely used in many fields. Here, a new type of light-emitting diode can be found in Daniel A. Steigerwald et al. in the IEEE Journal on Selected Topics. Illumination With Solid State Lighting Technology in Quantum Electronics, Vol. 8, No. 2, March/April 2002. A light-emitting diode generally emits light of a specific wavelength, such as visible light. However, about 80 to 90% of the energy received by the light-emitting diode is converted into heat, and the remaining energy is actually converted into light energy. Therefore, the heat generated by the illuminating diode must be evacuated to ensure the normal operation of the illuminating diode. Referring to FIG. 1, U.S. Patent No. 7,144,135 discloses a light-emitting diode lighting device 10 having heat dissipation performance, comprising an outer casing 11 and an inner casing 12 disposed inside the outer casing 11. A space formed between the body 11 and the inner casing 12 serves as an air passage 13. The outer casing 11 has a truncated conical shape with a larger end having an opening 111 and a smaller end connected to a digital to analog converter 15. The smaller end of the outer casing 11 is provided with a plurality of holes 16 for the intake air. A light-emitting diode 14 is disposed at the bottom of the inner casing 12, and a heat-dissipating fin 17 is disposed under the light-emitting diode 14. The heat-dissipating fin 17 is located between the outer casing 11 and the inner casing 12 to form 200920997. space. The smuggler turned to g7 to recognize that he had a horse, and the wind was driven away from the side of the light-emitting diode 14 and driven by the motor 18.哕g, Ί Ί Τ Τ 收 收 收 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 「 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达The heat dissipation fins 17 and the through-lights L 13 further flow out of the light-emitting diode illumination device .10, thereby dissipating the heat generated by the light-emitting diodes 14 to emit light. Private: ':Heil LED illumination The motor 18 used by the device 10 will have a risk of failure of the motor 18 and the wind; A light-emitting diode lighting device having better heat dissipation performance and lower energy consumption will be described by way of example. The light-emitting diode package includes a first-device body-air provided with air flow. a cavity and at least one light emitting diode disposed in the first housing, the air cavity is provided with at least one first air port and at least one second air port, and the at least one first air port is connected to the air flow channel And the at least one second port has a height in a direction of gravity, The working cavity is thermally coupled to the at least-light emitting diode for absorbing the heat generated by the operation of the small-light emitting diode, so that the air in the air cavity rises in the opposite direction to the gravity, and rises. The air selectively flows out through the at least one first port or the at least one second port. The heat generated by the at least one light-emitting diode included in the light-emitting diode lighting device is transmitted to the air cavity relative to the prior art The air temperature rises in the air chamber, which in turn causes the air in the air chamber to rise, and the upward air can selectively flow out to the light emitting diode through the first air port or the second air port. Outside the illuminating device, the air cavity is selectively sucked into the air outside the air cavity through the first port or the second port, thereby dissipating the heat generated by the at least one illuminating diode, thereby causing the illuminating The diode lighting device can have better heat dissipation performance without consuming additional energy. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. Please refer to FIG. 2 and FIG. The illuminating diode illuminating device 20 of the first embodiment of the present invention includes a first housing 200, a light emitting diode 23, and an air cavity 24. The first housing 200 includes an outer casing 21 And an inner casing 22, the outer casing 21 is a truncated hollow conical structure, such as a truncated hollow cone, a truncated hollow pyramid, the larger end portion has an opening 211, and the smaller end portion thereof The air cavity 24 is connected to the inner wall of the smaller end of the outer casing 21. In the present embodiment, the inner casing 22 is a reflector disposed on the outer casing 21. The space 25 formed between the outer casing 21 and the inner casing 22 serves as an air passage. The light-emitting diode 23 is disposed on the bottom of the inner casing 22 carried by the air cavity 24, and includes a base 231. And a light emitting portion 232, the substrate 231 is thermally connected to the air cavity 24. At least part of the light emitted by the light-emitting diode 23 can be reflected by the inner casing 22 and emitted out of the light-emitting diode illumination device 20, thereby improving the light utilization efficiency of the light-emitting diode 23. 9 200920997 The air cavity 24 includes a first sidewall 241 , a second sidewall 242 opposite the first sidewall 241 , and an annular third sidewall 243 between the first sidewall 241 and the second sidewall 242 . . The first sidewall 241 is thermally connected to the base 231 of the LED 23, and the second sidewall 242 is connected to a connecting portion 201. The connecting portion 201 can be connected to an external socket. The annular third side wall 243 is connected to the smaller end of the outer casing 21, and two first air ports 244 are disposed adjacent to the first side wall 241 and the annular third side wall 243, and the second side wall 242 is Two second ports 245 are disposed adjacent to the annular third side wall 243, and the first ports 244 communicate with the space 25 by the first ports 244. The second port 245 and the first port 244 have a height difference in the direction of gravity G. It can be understood that the first sidewall 241 and the base 231 of the LED 23 can also be coated with a thermal conductive adhesive to facilitate heat conduction, and the effective cross-sectional area of the first port 244 and the second port 245 can be the same; The number of the first port 244 and the second port 245 and the position of the second port 245 can be designed according to actual needs, as long as the first port 244 and the second port 245 have a height difference in the direction of gravity. The heat generated by the light-emitting diode 23 can be transferred to the air cavity 24, and the heat absorbed in the air cavity 24 is evacuated by the natural ventilation principle to realize the light-emitting diode. Body 23 performs the purpose of heat dissipation. Natural ventilation is not like the ventilation caused by the driving force of the fan. The natural ventilation system uses natural forces such as wind and buoyancy to achieve ventilation and cooling. Buoyancy Ventilation can be temperature induced 200920997 (Temperature-induced) or Humidity-induced. In this embodiment, the temperature is induced by means of temperature induction. The temperature induction can be characterized by the following formula: Q = C*A*[2gH(Ti-To)/Ti]Al/2 Here, Q is the ventilation rate ( M3/s), C is the flow coefficient (0.65~0.70), A is the effective cross-sectional area of the air inlet (m2), which is equal to the cross-sectional area of the air outlet, g is the acceleration of gravity (9.807m/s2), and the air inlet is the air inlet. The vertical distance (m) between the midpoint of the tuyere, Ti is the average temperature in the chamber or indoors (Κ), and To is the average temperature (K) outside the chamber or outside. When the LED device 20 is in operation, the heat generated by the LEDs 23 can be introduced into the air chamber 24 via the first side wall 241 of the air chamber 24, so that the temperature in the air chamber 24 rises. The high, in turn, causes the air in the air cavity 24 to rise, and the rising air can flow out into the space 25 via the two first ports 244. While the air in the air chamber 24 is rising, the air chamber 24 is also drawn into the air outside the air chamber 24 via the two second ports 245. It can be seen that the air of higher temperature in the air cavity 24 can flow out to the space 25 via the two first ports 244 and finally discharge the light-emitting diode lighting device 20, and the air cavity 24 also passes through the two The second port 245 draws in air having a lower external temperature, so that the air in the air chamber 24 forms a circulation system with the air outside it to evacuate the heat generated by the light-emitting diode 23. The light-emitting diode lighting device 20 utilizes natural forces to achieve better heat dissipation performance, does not require additional energy, and therefore consumes less energy. Referring to FIG. 4 and FIG. 5, the illuminating diode 10 200920997 body illuminating device 30 provided by the second embodiment of the present invention is substantially the same as the illuminating diode illuminating device 20 provided by the first embodiment, and the difference is: illuminating Two air passages 36 are formed in the space formed between the outer casing 31 and the inner casing 32 of the diode illuminating device 30; and the first side wall 341 of the air cavity 34 is adjacent to the annular third side wall 343. The four first ports 344 are respectively connected to the four air passages 36. Four second ports 345 are disposed adjacent to the second side wall 342 and the annular third side wall 343. When the opening direction of the LED illumination device 30 is parallel to the gravity direction G, the rising air in the air cavity 34 flows out into the four air channels 36 via the four first ports 344, and at the same time, the air cavity The body 34 will draw in the air outside the air cavity 34 via the four second ports 345. Herein, the illuminating diode illuminating device 30 utilizes the principle of natural ventilation, and can dissipate the heat generated by the illuminating diode 33 absorbed by the air cavity 34 without requiring additional energy. The light-emitting diode 33 is cooled. It can be understood that when the light-emitting diode illumination device 30 has different inclination angles with respect to the gravity direction G, the rising air in the air cavity 34 selectively flows out through the first air port 344 and/or the second air port 345. That is, the rising air will flow out through the first air port 344 and/or the second air port 345 which are relatively above in the gravity direction G, so that the light emitting diode illumination device 30 has better heat dissipation performance, and the light will be emitted below. The inclination angle of the diode illuminating device 30 with respect to the gravity direction G is 90 degrees as an example. Referring to FIG. 6 , the rising air in the air cavity 34 can flow out to the four first air ports 344 12 200920997 and the two second air ports 345 respectively in the gravity direction G via the air cavity 34 . The air passage 36 is outside the air chamber 34. At the same time, the air chamber 34 is respectively sucked into the air outside the air passage 36 via the two first air ports 344 and the two second air ports 345 in the gravity direction G. And the air outside the air chamber 34, thereby dissipating the heat generated by the light-emitting diode 33 absorbed by the air chamber 34. It can be seen that the intake and exhaust functions of the first port 344 and the second port 345 are different because the angle of inclination of the light-emitting diode illumination device 30 with respect to the gravity direction G is different. Referring to FIG. 7, a light-emitting diode illumination device 40 according to a third embodiment of the present invention includes a first housing 400, a light-emitting diode 43, and an air cavity 44. The first housing 400 includes an outer casing 41 and an inner casing 42. The outer casing 41 is a truncated tapered structure having a larger end with an opening 411, a smaller end portion and a threaded type. The connecting portions 401 are connected. The threaded connection 401 can be connected to a universal socket. The side wall of the smaller end is provided with a hole 412 for intake or exhaust. The inner casing 42 is disposed inside the outer casing 41, and a space 45 formed between the inner casing 42 and the outer casing 41 serves as an air passage. At least one support member 402 (two shown) may be disposed between the inner casing 42 and the outer casing 41 to allow the inner casing 42 and the outer casing 41 to be relatively fixed. The light-emitting diode 43 is disposed at the bottom of the inner casing 42 near the screw-type connecting portion 401, and includes a base 431 and a light-emitting portion 432. The air cavity 44 is disposed on the upper portion of the light-emitting diode 43 and covers the light-emitting diode 43 . The light-emitting diode body 43 includes a light-transmissive first sidewall 441 , and a ring-shaped second adjacent to the 13 200920997 first sidewall 441 . The sidewall 442 is opposite to the light emitting surface of the light emitting portion 432. An end of the air cavity 44 opposite the first side wall 441 has an opening. One end of the annular second side wall 442 near the light emitting diode 43 is connected to the base 431 of the light emitting diode 43. Therefore, the air chamber 44 and the base 431 of the light-emitting diode 43 enclose a space S in which the light-emitting portion 432 of the light-emitting diode 43 is disposed. In this embodiment, the air cavity 44 may be transparent or translucent, and the inner side of the first side wall 441 and the annular second side wall 442 may be coated with a phosphor or a filter. The air chamber 44 may be made of glass, acrylic (PMMA), polyphenylene amide (PPA), epoxy resin, silicone or the like. It can be understood that only the first side wall 441 can be made transparent or translucent. The annular second sidewall 442 of the air cavity 44 is disposed with a first air port 443 opposite to the end of the light emitting diode 43 and a second air port 444 opposite to the end of the light emitting diode 43. The first air port 443 extends through the annular second side wall 442 and the inner casing 42 of the air cavity 44 and communicates with the space S and the space 45 respectively. The second air port 444 extends through the annular shape of the air cavity 44. The side wall 442 and the inner casing 42 are in communication with the space S and the space 45, respectively. The first air port 443 and the second air port 444 may each be provided with an air filtering unit 445 for air filtering to better protect the light emitting diode 43 from contamination. When the light-emitting diode 43 emits light, the heat generated by it is directly collected in the space S in the air cavity 44, so that the temperature in the space S rises and the air in the space S rises, and the rising air can be passed through. The second port 444 flows out into the space 45. While the air in the space S rises, 14 200920997 . The space S also sucks the air outside the light-emitting diodes 43 through the holes 412 and the first port 443. It can be seen that the air having a higher temperature in the air chamber 44 can flow out to the space 45 through the second port 444 and finally discharge the light-emitting diode lighting device 40, and the air cavity 44 also passes through the hole 412 and the first The air port 443 draws in the air of a lower temperature, so that the air in the space S in the air chamber 44 forms a circulation system with the air outside it to evacuate the heat generated by the light-emitting diode 43. The illuminating diode illuminating device 40 utilizes natural forces to achieve better heat dissipation performance, does not require additional energy, and therefore consumes less energy. Referring to FIG. 8 and FIG. 9 , the illuminating diode illuminating device 50 according to the fourth embodiment of the present invention is substantially the same as the illuminating diode illuminating device 20 provided by the first embodiment, and the difference is that the illuminating diode is The body illuminating device 50 includes a first housing 500. The first housing 500 includes a body 51, a reflective film 59 disposed on the inner side of the body 51, and four air passages 52 disposed outside the body 51. The outer surface of the circular cavity 52 has a circular arc shape; four first air ports 544 are disposed adjacent to the first side wall 541 of the air cavity 54 and the annular third side wall 543, and the four first air ports 544 and the fourth The air passages 52 are in communication with each other; four second air ports 545 are disposed adjacent to the second side wall 542 and the annular third side wall 543; the rising air in the air cavity 54 flows out through the four first air ports 544 to the four In the air passages 52, at the same time, the air chambers 54 are drawn into the air outside the air chambers 52 via the four second ports 545. Herein, the light-emitting diode illuminating device 50 utilizes the principle of natural ventilation, and can dissipate the heat generated by the light-emitting diode 53 absorbed by the cavity 15 200920997 cavity 54 without requiring additional energy. The purpose of dissipating heat from the LEDs 53 is achieved. Referring to FIG. 10, the illuminating diode illuminating device 60 according to the fifth embodiment of the present invention is substantially the same as the illuminating diode illuminating device 20 provided by the first embodiment, and the difference is as follows: the illuminating diode illuminating device The 60 includes a hollow support rod 601 and a base 602. The hollow support rod 601 can be rigid or flexible, and one end thereof is engaged with the air chamber 64 to support the air chamber 64, the outer casing 61, and the inner portion. The other end of the housing 62, the light-emitting diode 63 and the like are engaged with the base 602; four first ports are disposed adjacent to the first side wall 641 of the air cavity 64 and the annular third side wall 643 The four first air ports 644 are respectively connected to the space 65 formed between the outer casing 61 and the inner casing 62; the second side wall 642 is provided with a second air port 645, and the cross-sectional area of the second air port 645 The air is raised in the air cavity 64 and flows out through the second air port 645 to the hollow support rod 601. The air with heat further flows through the hollow support rod 601 and passes through the hollow support rod 601. Exhaust port 603 on base 602 discharge. At the same time, the air cavity 64 will draw in the air in the space 65 via the first port 644. Here, the LED illuminating device 60 can be used as a desk lamp, which utilizes the principle of natural ventilation, and can be generated by the illuminating diode 63 absorbed by the air cavity 64 without requiring additional energy. The heat is dissipated to achieve the purpose of dissipating the light-emitting diode 63. In summary, the present invention has indeed met the requirements of the invention patent, and filed a patent application according to law 16 200920997. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view of a light-emitting diode lighting device disclosed in U.S. Patent No. 7,144,135. Fig. 2 is a top plan view showing a light-emitting diode lighting device according to a first embodiment of the present invention. 3 is a schematic cross-sectional view of the illuminating diode device of FIG. 2 along the ΙΠ_ΙΠ. Fig. 4 is a top plan view showing a light-emitting diode lighting device according to a second embodiment of the present invention. Figure 5 is a cross-sectional view of the light-emitting diode illumination device of Figure 4 taken along line ν_ν. Fig. 6 is a schematic cross-sectional view showing the light-emitting diode lighting device of Fig. 4 inclined at 90 degrees with respect to the direction of gravity. Figure 7 is a cross-sectional view showing a light-emitting diode lighting device of a third embodiment of the present invention. Fig. 8 is a top plan view showing a light-emitting diode lighting device according to a fourth embodiment of the present invention. Figure 9 is a cross-sectional view of the light-emitting diode lighting device of Figure 8 taken along line ιχ_Ιχ. Figure 10 is a cross-sectional view showing the illumination splitting of the light-emitting diode according to the fifth embodiment of the present invention. [Main component symbol description] Light-emitting diode lighting device housing inner casing air passage opening light-emitting diode digital-to-analog converter hole heat dissipation fin motor fan air cavity space body reflection film first housing connection portion base light-emitting portion First side wall second side wall third side wall 10, 20, 30, 40, 50, 60 11 , 21 , 31 , 41 , 61 12 , 2.2 , 32 , 42 , 62 13 , 36 , 52 111 , 211 , 411 14 , 23 , 33 , 43 , 53 , 63 15 16 , 412 17 18 19 24 , 34 , 44 , 54 , 64 25 , 45 , 65 51 59 200 , 400 , 500 201 231 , 431 , 602 232 241 , 341 , 441, 541, 641 242, 342, 442, 542, 642 243, 343, 543, 643 18 200920997 First port 244, 344, 544, 443, 644 Second port 245, 345, 444, 545 Connection 401 Support 402 light-emitting portion 432 air filter unit 445 hollow support rod 601 base 602 exhaust port 603 19