CN101363600A - 发光二极管灯具 - Google Patents

发光二极管灯具 Download PDF

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CN101363600A
CN101363600A CNA2007100756606A CN200710075660A CN101363600A CN 101363600 A CN101363600 A CN 101363600A CN A2007100756606 A CNA2007100756606 A CN A2007100756606A CN 200710075660 A CN200710075660 A CN 200710075660A CN 101363600 A CN101363600 A CN 101363600A
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radiator
led lamp
heat
conducting cylinder
light emitting
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CN101363600B (zh
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张文祥
余光
赖振田
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Priority to CN2007100756606A priority Critical patent/CN101363600B/zh
Priority to US11/943,505 priority patent/US7748876B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/777—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Abstract

一种发光二极管灯具，包括一第一散热器、一第二散热器、若干热管、及围绕第一散热器外壁贴置的若干发光二极管模组，所述第一散热器开设一贯穿的通口，所述第二散热器收容于该通口内且通过热管与第一散热器连接。与现有技术相比，本发明发光二极管灯具通过加设一第二散热器以辅助散热，可在控制散热器体积大小的同时获得一较高的散热效率；且，由于发光二极管模组围绕散热器外壁设置，可将光线向灯具四周辐射，达到一较佳的照明效果。

Description

发光二极管灯具
技术领域
本发明涉及一种发光二极管灯具，特别是指一种具有散热装置的发光二极管灯具。
背景技术
发光二极管作为一种高效的发光源，已经被越来越多地应用在各个领域当中。但是，发光二极管工作时会产生大量的热量，这些热量如若得不到及时的散发，容易使发光二极管产生过热现象，进而导致其发光效率下降。
传统的发光二极管灯具包括一板状的散热体及若干安装于散热体一侧的发光二极管。这些发光二极管均匀地排列于若干直线上。当发光二极管被点亮时，其产生的热量经由散热体散发至周围的空气当中。
但是，由于发光二极管的发热量较大，为了使其热量能够被及时散发出去，散热器的体积一般制造的比较庞大以获得一较大的散热面积，从而导致该发光二极管灯具的运输不甚便利；且，由于这些发光二极管位于散热体的同侧，其所发出的光线只能从散热体的该侧向外辐射而出，发光角度有限，不能同时照亮灯具的四周围，照明效果不佳。
发明内容
有鉴于此，实有必要提供一种散热效率较高且照明效果较佳的发光二极管灯具。
一种发光二极管灯具，包括一第一散热器、一第二散热器、若干热管、及围绕第一散热器外壁贴置的若干发光二极管模组，所述第一散热器开设一贯穿的通口，所述第二散热器收容于第一散热器的通口内且通过所述热管与第一散热器连接。
与现有技术相比，本发明发光二极管灯具加设一第二散热器以辅助散热，可在控制散热器体积大小的同时获得一较高的散热效率；且由于发光二极管模组围绕散热器外壁设置，可将光线向灯具四周辐射，达到一较佳的照明效果。
下面参照附图，结合具体实施例对本发明作进一步的描述。
附图说明
图1是本发明发光二极管灯具的立体组装图。
图2是图1的立体分解图。
图3是图1的倒置图。
图4是图1中散热器的气流走向图。
具体实施方式
如图1所示，本发明的发光二极管灯具包括一第一散热器10、一设置于第一散热器10内部的第二散热器20、若干连接第一散热器10和第二散热器20的热管30、及围绕第一散热器10设置的若干发光二极管模组40。
请参阅图2，所述第一散热器10和第二散热器20均由热导性良好的金属材料制成。该第一散热器10包括一第一导热筒12。本发明的实施例中该第一导热筒12为一中空的正六棱柱体。所述第一导热筒12具有六等大的矩形外壁120，供发光二极管模组40贴置。该第一导热筒12中部沿第一散热器10轴向开设一上下贯穿的圆形通口14，进而形成一圆筒形的内壁122。六平行的凹槽124均匀地开设于所述内壁122上，其中每一凹槽122与相应外壁120的中部相对设置，且沿第一散热器10轴向延伸至第一导热筒12的上、下端口。
请一并参阅图3，所述第二散热器20位于第一散热器10的通口14内，其包括一第二导热筒22及从第二导热筒22外壁(图未标)向外延伸而出的若干鳍片24。本发明实施例中该第二导热筒22为一中空的圆筒，其与第一导热筒12同轴，且其高度与第一导热筒12的高度相等。该第二导热筒22中部沿第二散热器20轴向开设一上下贯穿的圆形开口26，进而形成一圆筒形的内壁220。六平行的通槽222均匀地开设于所述内壁220上，其中每一通槽222对应于第一散热器10的每一凹槽124，且沿第二散热器20的轴向延伸至第二导热筒22的上、下端口，供热管30嵌入。所述鳍片24均呈矩形，其等间距地设置于第二导热筒22四周，进而形成若干供气流通过的间隙(图未标)。每一鳍片24的高度小于第二导热筒22的高度，其上边缘与第二导热筒22的上端口齐平，其下边缘未到达第二导热筒22的下端口。所述鳍片24的自由末端与第一导热筒12的内壁122存在一定的间隙，以使第二散热器20完全收容于第一散热器10内。与第一导热筒12凹槽124相对的每一鳍片24的自由末端切去一部分，使该每一鳍片24的长度小于处于其它位置的鳍片24的长度。这些末端切去一部分的鳍片24与第一导热筒12的凹槽124共同形成若干空间以收容热管30，从而防止热管30与鳍片24产生干涉。依据长度不同，可将鳍片24分为两类：第一类鳍片24b中每一鳍片24b均较长，其自由末端至第二导热筒22轴线的垂直距离小于第一导热筒12的内径；第二类鳍片24a中每一鳍片24a均较短，其自由末端至第二导热筒22轴线的垂直距离小于第一类鳍片24b中每一鳍片24b的自由末端至第二导热筒22轴线的垂直距离。
所述热管30连接第一导热筒12的内壁122和第二导热筒22的内壁220而将热量由第一散热器10传输至第二散热器20。每一热管30大致呈“ㄇ”形，其包括一冷凝段34、一平行于冷凝段34的蒸发段32、及垂直连接冷凝段34和蒸发段32的绝热段36。所述每一蒸发段32的嵌入第一导热筒12的凹槽124内且与相对的第二类鳍片24b间隔设置；所述每一冷凝段32嵌入于第二导热筒22的通槽222内；相应的绝热段36则位于第二类鳍片24a的正上方。
所述每一发光二极管模组40均包括一矩形的电路板44及沿电路板44长度方向固定于电路板44同侧的若干发光二极管42。三发光二极管模组40贴置于第一导热筒12的每一外壁120上。该三发光二极管模组40均平行于第一散热器10的轴线，且相互等间距的分布于每一外壁120上，其中位于中间的一发光二极管模组40与第一导热筒12的凹槽124相互对应，另外两侧的二发光二极管模组40则位于该每一外壁120靠向两侧边的位置。各侧面的发光二极管模组40均此布置，从而其所产生之热量能均匀地散布至整个第一散热器10。
请参阅图4，使用该发光二极管灯具时，发光二极管42通电发光，其产生的热量经由电路板44传导至第一散热器10。由于加设了第二散热器20，间接地增加了第一散热器10与空气的接触面积，从而可在不增大第一散热器10体积的基础上，使第一散热器10所吸收的热量通过第二散热器20迅速地散发出去，进而提高散热效率。一部分热量经由第一散热器10的外壁120向外辐射；另一部分热量经由第一散热器10内壁122散发至第一散热器10内部的空气中。第一散热器10内部的空气吸收热量之后膨胀成密度较小的热空气，其穿过第一散热器10的通口14的上部而离开第一散热器10；由于热空气的离开导致第一散热器10内部和外部间产生气压差，从而使位于第一散热器10外部的空气穿过通口14下部进入第一散热器10内；之后这部分空气吸收热量再度转变成热空气，从而持续地实现空气对流，不断地移除发光二极管灯具的热量。且，由于发光二极管模组40围绕第一散热器10外壁120设置，可将光线向灯具四周辐射，达到一较佳的照明效果。

Claims (13)

1.一种发光二极管灯具，其特征在于：包括一第一散热器、一第二散热器、若干热管、及围绕第一散热器外壁贴置的若干发光二极管模组，所述第一散热器开设一贯穿的通口，所述第二散热器收容于该通口内且通过所述热管与第一散热器连接。
2.如权利要求1所述的发光二极管灯具，其特征在于：所述第二散热器包括一环形的导热筒及若干从导热筒外壁朝向第一散热器内壁延伸的鳍片。
3.如权利要求2所述的发光二极管灯具，其特征在于：所述第一散热器包括一中空的柱体，其具有若干供发光二极管模组贴设的外壁面。
4.如权利要求3所述的发光二极管灯具，其特征在于：所述第一散热器为一中空的正六棱柱体。
5.如权利要求2至4任一项所述的发光二极管灯具，其特征在于：所述第一散热器内壁沿第一散热器轴向开设若干凹槽。
6.如权利要求5所述的发光二极管灯具，其特征在于：所述导热筒的高度与第一散热器相等，且大于所述鳍片的高度。
7.如权利要求5所述的发光二极管灯具，其特征在于：所述每一鳍片的自由末端与第一散热器的内壁具有间隙。
8.如权利要求5所述的发光二极管灯具，其特征在于：朝向第一散热器凹槽的每一鳍片的的长度小于位于其它位置的鳍片的长度。
9.如权利要求5所述的发光二极管灯具，其特征在于：所述导热筒内壁沿轴向开设若干通槽，这些通槽与第一散热器的凹槽一一对应。
10.如权利要求9所述的发光二极管灯具，其特征在于：每一热管包括一冷凝段、一蒸发段、及连接冷凝段和蒸发段的一绝热段，所述蒸发段嵌入第一散热器的凹槽内，所述冷凝段嵌入第二散热器的通槽内。
11.如权利要求10所述的发光二极管灯具，其特征在于：所述每一热管的冷凝段平行于蒸发段。
12.如权利要求9所述的发光二极管灯具，其特征在于：所述凹槽相互平行且延伸至第一散热器的上、下端口，所述通槽平行于所述凹槽且延伸至导热筒的上下端口。
13.如权利要求2所述的发光二极管灯具，其特征在于：所述导热筒与第一散热器同轴。
CN2007100756606A 2007-08-10 2007-08-10 发光二极管灯具 Expired - Fee Related CN101363600B (zh)

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US11/943,505 US7748876B2 (en) 2007-08-10 2007-11-20 LED lamp with a heat sink assembly

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Cited By (5)

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