200909729 九、發明說明： 【發明所屬之技術領域】 本發月/步及散熱裝置，特別是指—種應用於發光二極體燈具之 對流式散熱裝置。 【先前技術】 ^於傳統的燈泡’發光二極體具有耗電量低、元件壽命長、反應速 項優點，其體積小，又目前的製程日趨成熟，更發展出可以發出 不同波長的光，所以可以配置應用成為極小或陣列式（如光棒）之元件， 發先-極體現階段已經可以取代部分的發光裝置，私種電器、資訊看板、 通喊品等之發光元件，最常見的躺部分㈣f性電子產品、指示燈及 ，不裝置上，如：行動辦背光源、汽車外照示燈、液晶面板背光源 等0 心光-極體今本工作原理係在電極端子施加電壓時，即可將半導 料以光的形式激麟放’在—般、甚至是高辨的發光二滅作動下必須 考慮其散熱問題4本國專利公告第581234號「發光二極體之散熱結構改 良it卿在發光一極體之導電腳上裝設散熱構件，並藉由散熱構件襯 托發光二減的底部，使發光二鍾_快速散熱之效能，該發光二極體 之導電極腳上可裝設有散熱構件，崎熱構件擴大發光二鋪之㈣面 積。另外，本國專利公開第聰腿丄號「發光二極體燈之散熱裝置」中， 主要是利聰高功率發光二鋪燈連接於―均熱器的底面，使發光二極體 ，導出，歸料至平板式熱管絲人金屬板之歸的紐，域，使熱 篁被熱官内部流動的蒸氣散佈至均熱器的各區域，透過對流自動散熱。較 進步的技術則可以參考本國專利公告第125擺號「具高散熱效率之照明 裝置」’利用熱導體以及散熱鰭片裝配在燈具上，藉以提升發光二極且 之散熱效率。 〃 *如前所述之實施方式均利用熱傳導方式來進行散熱或熱交換，其散熱 效能或熱量Q=-KA (t2_tl)，K為熱傳係數，A為面積，t2、tl設定兩端 溫度差為ΔΤ ’科論贿種方式散熱，第二端之溫度在長_傳導散熱 200909729 會被不斷提升，故第二端和第一端（發光二極體端或稱底座）的溫度 △τ變小’究其賴乃在於前麟光二減妓之結齡法触整體良好 的政,”、在電腦主機中可以透過風扇的協助，使第二端的溫度下降，使溫 $梯度ΔΤ (t2-tl)變大’提升散熱效能。但是，發光二極體燈具中，其 安裝的環境可能在戶外(如LED路燈)或車輛LED頭燈，並不像電腦主機那 麼好，灰塵、雨水或髒污、油污都會使風扇很快損壞，而發光二極體燈具 -般要隨車保固（如3年、5、6年均有）’或路燈要1()年保固，因此裝風扇 散熱有其環境上的限制，本案乃針對此提出改善。 【發明内容】 本發明欲解決的技術問題與目的： 本發明主要目的在於在透過罩體結構設計所產生自然形成的 散熱流道，將發光二極體所產生的熱能自罩體内導出。 本發明次一目的在於避免利用熱傳導的方式進行散熱，使第二 端之溫度在長時間傳導散熱後，維持在相對較低的溫度範圍，故第 二端和第一端（發光二極體端或稱底座）的溫度差ΔΤ不變。 本發明解決問題的技術手段： 本發明具有對流式散熱裝置之發光二極體燈具，包括有：光 罩、發光二極體模組、散熱單元、罩體以及至少一葉輪，光罩並與 罩體對合形成一内部空間。散熱單元係設置在發光二極體模組後端 面，可將發光二極體模組產生的熱能進行散熱，散熱單元進—步可 利用熱管、散熱片、底座之任一組合方式達成，甚至採用鋁擠型形 成散熱片。燈具之罩體（Housing)係覆蓋於前述元件外，且任_ 面可設有氣孔及設置葉輪、通孔，發光二極體發光所產生的熱能將 透過底座、熱管、散熱片傳遞到罩體所形成的内部空間，透過氣孔 200909729 將外界冷空氣導入該内部空間，以及存在於内部空間熱能向冷端流 動，推動葉輪旋動而產生内外對流效果，藉以提升本創作燈具之散 熱效率。 發光二極體模組之設置方式多樣，能直接將發光二極體植立在 散熱單元之底座上，或者將發光二極體安裝在一基板再與散熱單元 之底座結合，差異僅在於製作流程的不同，對本發明而言散熱效率 應為相當。 氣孔及葉輪旁的通孔的設置位置均可選擇式的開設若干個，作 為輔助葉輪散熱，實際設置的方式、方位及數量將在後續的實施方 式之較佳實施例中陳述。 本發明對照先前技術的功效： 本發明採用熱對流方式使發光二極體燈具之散熱效果提升。應 用在汽車用燈具、戶外路燈上更具有顯著散熱效果，並且具有長時 間的使用時效性，有減少更換散熱單元的機會。 以下將配合圖式說明本發明的實施例，下述所列舉的實施例係 用以闡明本發明，並非用以限定本發明之範圍，任何熟習此技藝 者，當可做些許更動與潤飾，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。 【實施方式】 請參閱第一圖所示，本發明所述之燈具具有一光罩10，光罩 10為一種可透光材質，如：塑膠或玻璃所成形，並與罩體20對合 可形成一内部空間12，光罩10將設置在發光二極體模組30之前 200909729 方，以將發光二極體模組30所發出之光線均勻投射出。散熱單元 40可將發光二極體模組30產生的熱能進行導熱（散熱），係設置 在發光二極體模組30後端位置，在本實施例中，散熱單元4〇包括 有熱管42、散熱片44、底座46之組合，但並不限於此组合，亦 可採用鋁擠犁形成散熱片。而發光二極體模組30之設置方式多 樣，能如本實施例圖所示直接將發光二極體30a植立在散熱單元 40之底座46上，亦可先將發光二極體30a安裝在一基板上，而基 板再與散熱單元40之底座46結合。 罩體20 (Housing)與光罩1〇對合並且覆蓋於前述元件外， 且任一面可汉有氣孔22及设置葉輪50，在本實施中，氣孔22開 設在罩體20的前側面或側面周緣24，如圖所示，該氣孔22形式 可為長形氣孔22a或圓形氣孔22b ;葉輪50則以一連接端52與 罩體20之連接部26結合，在葉輪50的周圍可以設置通孔28，該 通孔28可以輔助散熱，提供本發明更佳的對流散熱效果。 请同時參閱第二圖以及第三圖，藉以說明本發明組合後的内部 氣流導引路徑。本發明燈具主要可以應用在車輛頭燈、室内_ ^ ’五等而應用大面積、高功率的發光二極體勢必將產生 可觀的熱能。在夂；从 I几件之組裝下’發光二極體模組30向光罩1〇 方向投射光線，發异__ 極體30a施加電壓後所產生的熱能將透過散 熱單元40之座體 6傳遞到熱管42及散熱片44上，進而傳遞到 罩體20所形成 、内。P空間12’此時因内外具有溫差，透過氣孔 200909729 22將外界冷空氣導人該内部空間12，以及存在於内部空間口熱 能向另-冷職動’將可順勢將熱管42及散熱片44上的熱能帶 走，推動葉輪50旋動而產生内外循環對流效果，藉以提升本創作 燈具之散熱效率。 請參閱第四圖所示，為本創作之第二實施例。為了符合各種 燈具裝配環境，本實施例具有較扁型的設計，其中，氣孔❿、 22b開設在罩體20之側面周緣24，而且葉輪5〇也將設置在罩體 20之一側邊周緣24位置。其散熱原理與第—實施例相同，發光二 極體30a施加電壓後所產生的熱能將透過散熱單元4〇之座體站 傳遞到熱管42及散熱片44jl，進而傳遞到軍體2〇所形成的内部 空間12,設置在側面周緣24的氣孔22將外界冷空氣導入該内部 空間12,順勢將熱管42及散熱片44上的熱能帶走，推動葉輪5〇 旋動而產生内外對流效果。故本實施例將可側向排出熱氣和降低燈 具縱向方向的高度。 請參閱第五圖及第六圖，分別為本發明之第三實施例以及第四 實施例’與第一實施例不同處在於罩體20形狀。如第五圖所示， 該罩體20自側面周緣24末端處到葉輪50之間呈現弧形設計，希 望藉由氣流流道聚集設計使散熱效果提升。第六圖具有相同的意 涵δ亥罩體20自側面周緣24末端處到葉輪50之間呈現椎狀設計。 兩實施例自氣孔22a、22b所引入之冷空氣將順著罩體2〇之流道 將熱能帶走，推動葉輪50旋動而產生内外對流效果。 200909729 請參閱第七圖所示，為本發明之第五實施例，罩體20之寬度 設計將略大於光罩10，氣孔22將開設在與發光二極體模組30同 一水平的罩體20面上，所以進氣的部位將由前面實施例之側邊位 置移至平面位置，將外界冷空氣導入該内部空間，順勢將熱管42 及散熱片44上的熱能帶走，推動葉輪50旋動而產生内外對流效 果。本實施例將發光面同時成為進氣面，在應用上亦能將氣孔22 廣設於光罩10之同一側向的罩體20周圍。 200909729 【圖式簡單說明】 第一圖為本發明第一實施例立體分解圖； 第二圖為本發明第一實施例組合剖視圖； 第三圖為本發明第一實施例氣流導引示意圖； 第四圖為本發明第二實施例氣流導引示意圖； 第五圖為本發明第三實施例氣流導引示意圖； 第六圖為本發明第四實施例氣流導引示意圖；及 第七圖為本發明第五實施例氣流導引示意圖。 【主要元件符號說明】 10 光罩 ’ 20 罩體 22 氣孔 22a、 22b 氣孔 24 側邊周緣 26 連接部 28 通孔 30 發光二極體模組 30a 發光二極體 40 散熱單元 42 孰管 44 散熱片 46 底座 50 葉輪 52 連接端 12 内部空間200909729 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a convective heat sink for a light-emitting diode lamp. [Prior Art] ^The conventional bulb 'light-emitting diode has the advantages of low power consumption, long component life, and fast response speed. Its small size, and the current process is becoming more mature, and it can develop light of different wavelengths. Therefore, it is possible to configure the application to become a component of a very small or array type (such as a light bar). The first-polar stage can replace some of the light-emitting devices, the lighting elements such as private appliances, information boards, and shouting products, the most common lying Part (4) f-electronic products, indicator lights and devices, such as: mobile office backlights, automotive exterior lights, LCD panel backlights, etc. 0 heart-polar body This working principle is when the voltage is applied to the electrode terminals. The semi-conducting material can be placed in the form of light. In the general, even high-resolution illumination, the heat dissipation problem must be considered. 4 National Patent Publication No. 581234 "The heat dissipation structure of the LED is improved. Qing installed a heat dissipating member on the conductive leg of the light-emitting body, and arranged the bottom of the light-emitting reduction by the heat-dissipating member to make the light-emitting two-time _ rapid heat-dissipating effect, the guide of the light-emitting diode The electrode pin can be equipped with a heat dissipating member, and the heat-sinking member enlarges the area of the light-emitting two-story. In addition, the domestic patent discloses that the Congcong leg nickname "the heat-dissipating device of the LED lamp" is mainly Licong high-power illumination. The two-spot light is connected to the bottom surface of the “heating device”, so that the light-emitting diodes are led out and returned to the button and the heat of the flat-plate heat pipe. Each area of the heat exchanger is automatically dissipated through convection. The more advanced technology can be assembled on the luminaire by using the heat conductor and the heat dissipating fins in accordance with the National Patent Publication No. 125 "Lighting Device with High Heat Dissipation Efficiency", thereby improving the heat dissipation efficiency of the illuminating diode. 〃 *The above embodiments use heat conduction to dissipate heat or heat exchange. The heat dissipation efficiency or heat Q=-KA (t2_tl), K is the heat transfer coefficient, A is the area, and t2 and tl are set to the temperature at both ends. The difference is ΔΤ 'The theory of bribery is to dissipate heat, and the temperature at the second end will be continuously increased in the long _ conduction heat dissipation 200909729, so the temperature Δτ of the second end and the first end (light emitting diode end or base) will be changed. Xiao's research is based on the fact that the former Linguang second reduction method is a good overall policy." In the computer host, the temperature of the second end can be lowered by the help of a fan to make the temperature gradient ΔΤ (t2-tl). ) Larger to improve heat dissipation. However, in a light-emitting diode lamp, the installation environment may be outdoors (such as LED street lights) or vehicle LED headlights, not as good as a computer host, dust, rain or dirt, Oil stains can cause the fan to be damaged quickly, and the light-emitting diode lamps are generally guaranteed to be car-filled (such as 3 years, 5 or 6 years) or the street lamps must be 1 year old, so the fan cooling has its environment. The limitation of this case is to improve the case. [Summary of the Invention] Technical Problem and Object to Be Solved by the Invention: The main object of the present invention is to derive heat energy generated by a light-emitting diode from a body through a naturally-formed heat-dissipating flow path formed by a cover structure design. The second object of the present invention is Avoid heat conduction by means of heat conduction, so that the temperature of the second end is maintained at a relatively low temperature range after long-term conduction heat dissipation, so the temperature of the second end and the first end (light emitting diode end or base) The ΔΤ is not changed. The technical means for solving the problem of the present invention: The illuminating diode lamp having the convection heat dissipation device comprises: a reticle, a light emitting diode module, a heat dissipating unit, a cover body and at least one impeller, The reticle is combined with the hood to form an internal space. The heat dissipating unit is disposed at the rear end surface of the illuminating diode module, and can dissipate heat generated by the illuminating diode module, and the heat dissipating unit can utilize the heat pipe. Any combination of the heat sink and the base is achieved, and even a heat sink is formed by using an aluminum extrusion type. The housing of the lamp is covered by the aforementioned components, and The air hole and the impeller and the through hole are arranged, and the heat generated by the light emitting diode is transmitted to the inner space formed by the cover through the base, the heat pipe and the heat sink, and the outside cold air is introduced into the inner space through the air hole 200909729, and The thermal energy flowing in the internal space flows to the cold end, and the impeller is rotated to generate internal and external convection effects, thereby improving the heat dissipation efficiency of the created lamp. The LED module is arranged in various ways, and can directly illuminate the LED. On the base of the heat dissipating unit, or the light emitting diode is mounted on a substrate and then combined with the base of the heat dissipating unit, the difference is only in the manufacturing process. For the present invention, the heat dissipating efficiency should be equivalent. The air hole and the through hole of the impeller A plurality of positions can be selectively selected to provide heat dissipation for the auxiliary impeller. The manner, orientation and number of actual settings will be set forth in the preferred embodiment of the subsequent embodiments. The invention compares the efficacy of the prior art: The invention adopts the heat convection method to improve the heat dissipation effect of the light emitting diode lamp. It has a significant heat dissipation effect on automotive lamps and outdoor street lamps, and has a long-term use time, which reduces the chance of replacing the heat dissipation unit. The embodiments of the present invention are described below in conjunction with the drawings. The following examples are set forth to illustrate the invention and are not intended to limit the scope of the present invention. The scope of the invention is defined by the scope of the appended claims. [Embodiment] Referring to the first figure, the lamp of the present invention has a photomask 10, which is a light transmissive material, such as plastic or glass, and is matched with the cover 20. An inner space 12 is formed, and the photomask 10 is disposed before the light-emitting diode module 30 before 200909729 to uniformly project the light emitted by the light-emitting diode module 30. The heat dissipating unit 40 can heat-dissipate the heat generated by the LED module 30, and is disposed at the rear end of the LED module 30. In this embodiment, the heat dissipating unit 4 includes a heat pipe 42. The combination of the heat sink 44 and the base 46 is not limited to this combination, and an aluminum extrusion plough may be used to form the heat sink. The LED module 30 can be disposed on the base 46 of the heat dissipating unit 40 as shown in the embodiment of the present invention. The LEDs 30a can be installed first. On a substrate, the substrate is then combined with the base 46 of the heat dissipation unit 40. The housing 20 is placed in contact with the reticle 1 并且 and covers the outside of the aforementioned components, and any of the faces may have a vent 22 and an impeller 50. In the present embodiment, the vent 22 is formed on the front side or the side of the cover 20. The peripheral edge 24, as shown, may be in the form of an elongated air hole 22a or a circular air hole 22b; the impeller 50 is coupled to the connecting portion 26 of the cover 20 by a connecting end 52, and may be disposed around the impeller 50. A hole 28, which can assist in heat dissipation, provides a better convective heat dissipation effect of the present invention. Please refer to the second figure and the third figure at the same time to illustrate the combined internal airflow guiding path of the present invention. The lamp of the invention can be mainly applied to vehicle headlights, indoors, etc., and the application of large-area, high-power light-emitting diodes is bound to generate considerable heat energy. In the assembly of the I component, the light-emitting diode module 30 projects light toward the mask 1 ,, and the heat generated by applying the voltage to the polar body 30a will pass through the body 6 of the heat dissipation unit 40. It is transmitted to the heat pipe 42 and the heat sink 44, and is transmitted to the inside of the cover body 20. At this time, the P space 12' has a temperature difference between the inside and the outside, and the external cold air is guided to the internal space 12 through the air hole 200909729 22, and the heat energy existing in the internal space is moved to another cold position, and the heat pipe 42 and the heat sink 44 can be taken. The heat energy on the belt is taken away, and the impeller 50 is rotated to generate an internal and external circulation convection effect, thereby improving the heat dissipation efficiency of the created lamp. Please refer to the fourth figure, which is the second embodiment of the present invention. In order to comply with various luminaire assembly environments, the present embodiment has a relatively flat design in which the air vents 22b are formed on the side periphery 24 of the hood 20 and the impeller 5 〇 will also be disposed on the side periphery 24 of one of the hoods 20 position. The heat dissipation principle is the same as that of the first embodiment. The heat generated by the application of the voltage from the light-emitting diode 30a is transmitted to the heat pipe 42 and the heat sink 44jl through the base station of the heat dissipation unit 4, and then transmitted to the military body 2〇. The internal space 12, the air hole 22 disposed at the side periphery 24 introduces outside cold air into the internal space 12, and the heat energy on the heat pipe 42 and the heat sink 44 is taken away, and the impeller 5 is rotated to generate internal and external convection effects. Therefore, this embodiment will discharge the hot gas laterally and lower the height in the longitudinal direction of the lamp. Referring to the fifth and sixth figures, the third embodiment and the fourth embodiment, respectively, of the present invention differ from the first embodiment in the shape of the cover 20. As shown in the fifth figure, the cover 20 has an arc-shaped design from the end of the peripheral edge 24 to the impeller 50, and it is desired to enhance the heat dissipation effect by the airflow flow collecting design. The sixth figure has the same meaning that the delta-shaped cover 20 presents a vertebral design from the end of the peripheral edge 24 to the impeller 50. The cold air introduced from the air holes 22a, 22b of the two embodiments will carry the heat energy along the flow path of the cover 2, and push the impeller 50 to rotate to generate internal and external convection effects. 200909729 Referring to the seventh embodiment, in the fifth embodiment of the present invention, the width of the cover 20 will be slightly larger than that of the reticle 10, and the air vent 22 will be opened at the same level as the illuminating diode module 30. On the surface, the portion of the intake air will be moved from the side position of the previous embodiment to the plane position, and the outside cold air is introduced into the internal space, and the heat energy on the heat pipe 42 and the heat sink 44 is taken away, and the impeller 50 is rotated. Generate internal and external convection effects. In this embodiment, the light-emitting surface is simultaneously formed as an air-inlet surface, and the air holes 22 can be widely disposed around the cover 20 of the same lateral direction of the reticle 10 in application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective exploded view of a first embodiment of the present invention; FIG. 2 is a cross-sectional view of a first embodiment of the present invention; 4 is a schematic diagram of airflow guidance according to a second embodiment of the present invention; FIG. 5 is a schematic diagram of airflow guidance according to a third embodiment of the present invention; and FIG. 6 is a schematic diagram of airflow guidance according to a fourth embodiment of the present invention; A schematic diagram of airflow guidance in a fifth embodiment of the invention. [Main component symbol description] 10 Photomask '20 Cover 22 Air holes 22a, 22b Air hole 24 Side circumference 26 Connection portion 28 Through hole 30 Light-emitting diode module 30a Light-emitting diode 40 Heat-dissipating unit 42 Tube 44 Heat sink 46 base 50 impeller 52 connection end 12 internal space