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CN101392899B - 具有散热结构的发光二极管灯具 - Google Patents

具有散热结构的发光二极管灯具 Download PDF

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CN101392899B
CN101392899B CN200710201818XA CN200710201818A CN101392899B CN 101392899 B CN101392899 B CN 101392899B CN 200710201818X A CN200710201818X A CN 200710201818XA CN 200710201818 A CN200710201818 A CN 200710201818A CN 101392899 B CN101392899 B CN 101392899B
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led lamp
radiator
radiator structure
lamp
cylindrical shell
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CN101392899A (zh
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张树起
吕英杰
谌秉佑
吕孝文
江文章
徐弘光
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Foxsemicon Integrated Technology Shanghai Inc
Foxsemicon Integrated Technology Inc
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Foxsemicon Integrated Technology Inc
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    • 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
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • 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
    • 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
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-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
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • 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
    • F21V29/773—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 the direction of the light emitting axis
    • 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]

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  • Physics & Mathematics (AREA)
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  • Geometry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

一种具有散热结构的发光二极管灯具，其包括一灯座、与所述灯座连接的一散热器、和与该散热器导热连接的若干发光二极管模组，所述散热器包括一中空筒体，所述筒体一端与周围空气连通，所述筒体另一端与所述灯座连通，所述灯座上设置有与周围空气连通的若干通气孔。上述发光二极管灯具的散热器筒体内与该灯座形成一内循环的气流通路能有效地加强气流流通及加大散热器与气流接触的面积，从而可在有限的体积内实现灯具的良好散热，进而解决了高功率发光二极管灯具的散热问题。

Description

具有散热结构的发光二极管灯具
技术领域
本发明涉及一种发光二极管灯具，特别涉及一种具有散热结构的发光二极管灯具。
背景技术
发光二极管光源作为一种新兴的第三代光源，虽然现在还不能大规模取代传统的白炽灯，但是其具有工作寿命长、节能、环保等优点，而普遍被市场所看好。而且，目前由发光二极管组成的模块能产生大功率、高亮度的光源，完全可以取代现有白炽灯实现室内外照明，也将广泛地、革命性地取代传统的白炽灯等现有的光源，进而成为符合节能环保主题的主要光源。
然而，功率、亮度越大的发光二极管或其模组产生的热量越大，且在体积相对较小的发光二极管灯具内难于散发出去。故，发光二极管尚存在较大散热技术瓶颈，这也是目前大功率、高亮度发光二极管灯具市场化最难突破的关键之处。目前业界通用的散热方案是在该灯具内设置一散热器，通过该散热器表面与自然对流空气接触的方式将热量散发到周围空气中。所以要满足高功率、高亮度的发光二极管灯散热需求以使其能正常工作防止光衰，就必须提供散热面积很大的散热器。这样通常会导致散热器在灯具中所占体积大，整体灯具体积也大，使得这种灯具结构体积较大而难以在室内照明中推广应用。
发明内容
有鉴于此，有必要提供一种用在发光二极管灯具内具有较佳散热性能的散热装置。
一种具有散热结构的发光二极管灯具，其包括一灯座、与所述灯座连接的一散热器、和与该散热器导热连接的若干发光二极管模组，所述散热器包括一中空筒体，所述筒体一端与周围空气连通，所述筒体另一端与所述灯座连通，所述灯座上设置有与周围空气连通的若干通气孔。
上述发光二极管灯具的散热器筒体内与该灯座形成一内循环的气流通路能有效地加强气流流通及加大散热器与气流接触的面积，从而可在有限的体积内实现灯具的良好散热，进而解决了高功率发光二极管灯具的散热问题。
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是本发明具有散热结构的发光二极管灯具的第一实施例的立体组合图。
图2是图1中具有散热结构的发光二极管灯具的立体分解图。
图3是图2中散热器的立体图。
图4是图1中沿剖线IV-IV的剖示图。
图5是本发明具有散热结构的发光二极管灯具的第二实施例的立体组合图。具体实施方式
图1-2示出了本发明具有散热结构的发光二极管灯具的第一实施例，其包括一灯座10、与该灯座10连接的散热器20、均匀贴设在该散热器20表面上的若干发光二极管模组30和安装在该灯座10内的气流产生装置40(如图4所示)。
上述灯座10包括一灯帽12、连接于该灯帽12上的一第一盖体14和与该第一盖体14对扣的一第二盖体16。该灯帽12为一标准螺纹灯帽，适配于普通螺合式灯头。该第一盖体14为一由塑胶材料制成的碗状体，其包括底端与灯帽12连接的一管形连接部140和与该连接部140连接的一第一碗壁142。该碗壁142的口径由下向上逐渐增大，而形成一向上开口的碗状盖体，该第一碗壁142在开口处的内壁周缘均匀开设三安装孔1420，用于供螺杆件(图未示)穿过与第二盖体16螺合。该第二盖体16为一由塑胶或金属材料制成的倒置碗状体，其包括一环形结合部160和与该结合部160连接的一第二碗壁162。该结合部160的直径略小于该连接部140的直径，其内设置有内螺纹1600，以与散热器20底部螺合连接，该结合处160的管壁上均匀开设有三透孔1602。该第二碗壁162与该结合部160连接的上半部分的口径由上向下逐渐增大，该第二碗壁162的上半部分均匀开设有与发光二极管模组30对应的若干穿孔164，这些穿孔164大致自下向上穿透该碗壁162以供连接发光二极管模组30的电源线组(图未示)穿过；该第二碗壁162下半部分为口径均匀的环状体，其开口大小与第一盖体14的开口相适配，该环状体均匀开设有若干通气孔166以供气流进入第一、二盖体14、16形成的空间内，且该第二碗壁162在开口的内壁周缘距均设置有三螺孔(图未示)，这些螺孔分别与第一盖体14的安装孔1420对应以与穿过该安装孔1420的螺杆件配合将该第一、二盖体14、16结合在一起。该第一、二盖体14、16结合在一起形成的空间可容置该发光二极管灯具的电子整流器(图未示)。此外，在该发光二极管灯具内设置有一方向感测器(图未示)，该感测器可以是安装在该灯座10内，也可以是在该散热器20的筒体22内。因为空气受热会向上移动，一般气流自然对流的方向是向上的，所以该方向感测器可用于侦测该发光二极管灯具的摆放方向，以控制该气流产生装置40产生方向向上的强制气流。
如图3所示，上述散热器20由导热性能良好的材料如铝、铜等金属材料一体形成。该散热器20具有一长管状筒体22，该筒体22内壁沿该筒体22的径向向内延伸有若干条形内鳍片24，这些内鳍片24关于该筒体22中心轴线均匀对称地分布，这些内鳍片24的厚度自筒体内壁开始向内逐渐递减，故其横截面大致呈锐角三角形但顶角尖端被钝化形状。该筒体22外壁沿其径向向外延伸有若干导热臂26，这些导热臂26关于该筒体22中心轴线均匀对称地分布，这些导热臂26的数量对应发光二极管模组30的数量，故在不同实施例中可为不同的数量，而在本实施例中为对应六发光二极管模组30的六导热臂26。这些导热臂26的延长线将相交于该筒体22的中心轴线，该导热臂26向两侧垂直延伸有若干对外鳍片260，每一对外鳍片260均关于对应的导热臂26对称，且这些外鳍片260的长度由里向外逐渐递增。每一导热臂26的末端均与最外端的外鳍片260内侧表面连接，所以每一导热臂26最外侧的一对外鳍片260的外侧表面均为一平滑平面。该筒体22底端向下延设一螺合筒28，该螺合筒28设置有与第二盖体16结合部160的内螺纹1600相适配的外螺纹(未标号)，该螺合筒28的筒体上均匀开设有与结合部160的透孔1602对应的三螺孔280。在该散热器20螺合筒28与第二盖体16的结合部160螺合完成时，这些结合部160的透孔1602与这些螺孔280对应并供螺钉(图未示)穿过而与这些螺孔280螺合，从而进一步锁固散热器20与该第二盖体16。在其它实施例中，可以不设置该散热器20螺合筒28的外螺纹及结合部160的内螺纹，该散热器20与该第二盖体16的连接可以是通过螺钉穿过该结合部160的透孔1602与螺合筒28的螺孔280螺合来实现。此外，为了该筒体22具有较理想的烟囱效应，以利于筒体22内的气流流通，该筒体22的长度与直径的比例即是长径比选取为十比一以上或五比一以上，在本实施例中该筒体22的长径比优选为十比一，一般来说长径比太低，其效果不佳能达到十比一以上较佳。
请一并参阅图2，该发光二极管模组30包括一矩形电路板32，该电路板32的形状大小略小于散热器20最外侧的外鳍片260，其上并排安装有若干个发光二极管元件34。
如图4所示，上述气流产生装置40安装于该灯座10内，其位于该第二盖体16的第二碗壁162与结合部160的连接处，该气流产生装置40正对该散热器20筒体22与该结合部160内连通的通道，以便其产生的气流直接从该通道内通过。该气流产生装置40可以是超声波风扇、压电动力风冷等气冷装置，在本实施例中该气流产生装置为马达驱动的风扇。
上述发光二极管灯具在组装时，该气流产生装置40通过螺钉或粘贴等方式固定于该第二盖体16的第二碗壁162与结合部160的连接处，再用螺杆件穿过第一盖体14的安装孔1420与第二盖体16的螺孔螺合，而将第一、二盖体14、16结合在一起。该散热器20底端的螺合筒28与第二盖体16上结合部160螺合连接。这些发光二极管模组30分别贴置在该散热器20最外侧的外鳍片260的外侧面上，且发光二极管模组30与对应外鳍片260之间可填充如导热胶之类的导热介质，以增加它们间的导热能力。
上述发光二极管灯具在使用时，为了使其内的空气在该散热器20筒体22的烟囱效应下而受热由下向上对流，应该筒体22大致竖直摆放。该发光二极管模组30将热量传导到与其接触的散热器20的外鳍片260上，再通过导热臂26将热量均匀分布到散热器20导热筒体22及其内的内鳍片24上。该筒体22外壁、该导热臂26和该外鳍片260直接与周围的空气接触将热量散发到周围的空气中去。该筒体22内与该第一、二盖体14、16形成的空间连通并形成一气流通路，也就是气流在该气流产生装置40的驱动下，从该第二盖体16的通气孔166进入，再经筒体22内壁受热，最后从筒体22顶端出口流出，或者在该发光二极管灯具与图1所示的相反位置放置时，空气从筒体22底端进入，再经筒体22内壁热交换受热，最后从该第二盖体16的通气孔166出口流出。安装在该灯座10内的气流产生装置40顺着该散热器20筒体22内的自然气流方向产生强制气流，极大地促进了该散热器20内外的气流循环，从而快速将该散热器20的内外鳍片24、260上的热量散发到气流中去并被带走，进而达到高效散热的目的。
如图5所示，本发明第二实施例中具有散热结构的发光二极管灯具，与第一实施例相比，该发光二极管灯具的气流产生装置50安装在该散热器20的顶部，完全覆盖该散热器20筒体22的顶部。该气流产生装置50具有与该散热器20顶部相匹配的圆形扇框(未标号)，该扇框可通过上螺钉或粘贴等方式固定在该散热器20的顶部，从而使其产生的气流主要在该散热器20的筒体22内流通，有小部分气流经过散热器20的外鳍片260，对这些外鳍片260及安装其上的发光二极管模组30进行附带散热。
在其它实施例中，上述发光二极管灯具也可以不设置任何气流产生装置，只需在发光二极管灯具使用时，使其散热器20大致竖直摆放，该发光二极管灯具内的空气将在该散热器20筒体22的烟囱效应下，由下向上对流而将发光二极管模组30产生的热量散发到周围环境中。

Claims (17)

1.一种具有散热结构的发光二极管灯具，其包括一灯座、与所述灯座连接的一散热器、和与该散热器导热连接的若干发光二极管模组，其特征在于：所述散热器包括一中空筒体，所述筒体一端与周围空气连通，所述筒体另一端与所述灯座连通，所述灯座上设置有与周围空气连通的若干通气孔，该具有散热结构的发光二极管灯具进一步包括气流产生装置以及方向感测器，所述气流产生装置产生的气流在所述通气孔与所述筒体内流通，所述方向感测器安装在所述灯座或所述筒体内，以控制所述气流产生装置产生向上的气流。
2.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述气流产生装置产生的气流从所述通气孔流入所述发光二极管灯具，从所述筒体一端流出所述发光二极管灯具。
3.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述气流产生装置产生的气流从所述筒体一端流入所述发光二极管灯具，从所述通气孔流出所述发光二极管灯具。
4.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述气流产生装置安装在所述灯座内，位于所述通气孔与所述筒体之间。
5.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述气流产生装置安装在所述散热器顶部。
6.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述筒体的长度与直径的比例为五比一以上。
7.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述筒体的长度与直径的比例为十比一以上。
8.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述筒体内部形成有若干内鳍片，所述筒体外部形成有若干外鳍片，所述若干发光二极管模组贴置在所述外鳍片中位于散热器最外侧的鳍片的外表面上。
9.如权利要求8所述的具有散热结构的发光二极管灯具，其特征在于：所述内鳍片厚度自筒体内壁向内逐渐减小。
10.如权利要求8所述的具有散热结构的发光二极管灯具，其特征在于：所述筒体外壁延伸设置有若干导热臂，且关于所述筒体的中心轴线均匀对称 地分布。
11.如权利要求10所述的具有散热结构的发光二极管灯具，其特征在于：所述外鳍片形成于所述导热臂两侧。
12.如权利要求11所述的具有散热结构的发光二极管灯具，其特征在于：所述导热臂两侧的外鳍片垂直于并关于所述导热臂对称，且每一导热臂同一侧的外鳍片的长度由所述导热臂靠近所述筒体的一端向另一端递增。
13.如权利要求12所述的具有散热结构的发光二极管灯具，其特征在于：所述散热器最外侧的一对外鳍片的外侧表面与所述发光二极管模组接触。
14.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述灯座包括一标准灯帽、与所述灯帽连接的一碗状第一盖体和与所述第一盖体对扣的一碗状第二盖体。
15.如权利要求14所述的具有散热结构的发光二极管灯具，其特征在于：所述第一盖体与第二盖体结合形成一中空壳体，所述壳体一端中间为环状体，其两端口径渐小，所述壳体一端连接灯帽，另一端设置一结合部，所述通气孔设置在所述壳体的环状体上。
16.如权利要求15所述的具有散热结构的发光二极管灯具，其特征在于：所述结合部呈环形，其内设内螺纹，所述散热器底端向下延伸一中空螺合筒，所述螺合筒外壁设有所述结合部螺合的外螺纹。
17.如权利要求1所述的具有散热结构的发光二极管灯具，其特征在于：所述气流产生装置可以是马达驱动风扇、超声波风扇或压电动力风冷装置。 
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