CN101349412A - 发光二极管灯具 - Google Patents

发光二极管灯具 Download PDF

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CN101349412A
CN101349412A CNA2007100752060A CN200710075206A CN101349412A CN 101349412 A CN101349412 A CN 101349412A CN A2007100752060 A CNA2007100752060 A CN A2007100752060A CN 200710075206 A CN200710075206 A CN 200710075206A CN 101349412 A CN101349412 A CN 101349412A
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heat
pedestal
radiating part
led lamp
light emitting
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李宗隆
何立
肖旭华
刘宜三
张文祥
余光
郑世崧
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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 CNA2007100752060A priority Critical patent/CN101349412A/zh
Priority to US11/833,948 priority patent/US20090021944A1/en
Publication of CN101349412A publication Critical patent/CN101349412A/zh
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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
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • 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
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/717—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements using split or remote units thermally interconnected, e.g. by thermally conductive bars or 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
    • 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
    • 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
    • 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
    • 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
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    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
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  • Microelectronics & Electronic Packaging (AREA)
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  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种发光二极管灯具，包括一灯罩、位于灯罩内的若干发光二极管，以及一散热模组。其中，该散热模组包括一位于灯罩内的吸热部、一位于灯罩外部的散热部，以及一连接吸热部与散热部的热管。该散热部包括一中空的基座及设于基座上的若干散热片。该热管穿设于散热部的基座及吸热部内，并被该散热部的基座及吸热部紧密包裹。吸热部上分布有所述发光二极管。由于热管被该散热部和吸热部包裹，增大了热管与散热部和吸热部之间的接触面积，有利于热管与散热部和吸热部之间的热交换作用，可充分利用热管将发光二极管产生的热量快速地转移到散热部，进而提高了散热模组的散热效率。

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模组的发光二极管灯具。
背景技术
随着科学技术的进步，从一般钨丝灯发展到现在的冷阴极荧光灯管(ColdCathode Fluorescent Lamp，CCFL)及发光二极管(Light Emitting Diode，LED)，皆是朝向体积缩小及扁平化的方向发展。
而目前CCFL因为体积几乎是不能再缩小，而且CCFL升压到600伏特电压时会发生干扰，另外CCFL会造成汞污染的问题，使得部分国家也将予以禁用。而LED具有环保、亮度高、省电、寿命长等诸多特点，所以LED将渐渐取代CCFL。然而，现今的高亮度LED所产生的局部热量较大，若要取代CCFL作为照明产品，则必须要有合适的散热设计；否则会造成LED发光效率降低及寿命缩短等问题，所以现今LED封装结构多利用金属承载基板(Metal Core Print Circuit Board，MCPCB)作为散热媒介，但LED仍无法以高密集度方式设置，原因在于散热能力仍无法有效突破，因此有关LED散热是目前业界亟需克服的难题。
发明内容
有鉴于此，有必要提供一种散热良好、工作稳定的发光二极管灯具。
一种发光二极管灯具，包括一灯罩、位于灯罩内的若干发光二极管，以及一散热模组。其中，该散热模组包括一位于灯罩内的吸热部、一位于灯罩外部的散热部，以及一连接吸热部与散热部的热管。该散热部包括一中空的基座及设于基座上的若干散热片。该热管穿设于散热部的基座及吸热部内，并被该散热部的基座及吸热部紧密包裹。吸热部上分布有所述发光二极管。
与现有技术相比，本发明将一热管穿设于散热部的基座及吸热部内，且热管被该散热部和吸热部包裹，增大了热管与散热部和吸热部之间的接触面积，有利于热管与散热部和吸热部之间的热交换作用，可充分利用热管将发光二极管产生的热量快速地转移到散热部，进而提高了散热模组的散热效率。
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是本发明一实施例中发光二极管灯具的立体图。
图2是图1中发光二极管灯具的散热模组与发光二极管模组的立体图。
图3是图2中散热模组与发光二极管模组的分解图。
图4是图2中散热模组与发光二极管模组的剖视图。
图5是本发明另一实施例中发光二极管灯具中的散热模组与发光二极管模组的立体图。
具体实施方式
如图1至图4所示，本发明的发光二极管灯具包括一发光二极管模组100和一用以支撑并冷却该发光二极管模组100的散热模组200。为防止灰尘、昆虫等影响发光二极管模组100的使用寿命，可将一灯罩400设于散热模组200上，并将发光二极管模组100收容于其内。该灯罩400通常是由透明的塑料、玻璃或其他材料制成。
该散热模组200包括一位于灯罩400外部的散热部210、一位于灯罩400内部的吸热部，以及一支热管270，该热管270的两端分别与该吸热部和散热部210连接。
该散热部210的外形大致呈圆柱状，其包括一圆筒状的基座212，以及自该基座212外侧周面向外放射状延伸的若干散热片214。相邻的散热片214之间分别形成一通道216以供气流流过。该基座212两端分别凸伸出有环形连接部，即位于基座212上方的上连接部2122和位于基座212下方的下连接部2124。该上连接部2122与吸热部连接；而下连接部2124与一灯头(图中未示)连接，该灯头为可从市场上获得的标准件。该基座212上形成有一通孔2121，该通孔2121自基座212的上连接部2122延伸到下连接部2124，用以收容、固定热管270。
热管270呈圆柱状，其外形尺寸与基座212上的通孔2121相匹配，以便可以将热管270紧密地固定在基座212的通孔2121内。该热管270的上下两端分别穿设于吸热部、散热部210的基座212内，故，热管270的上下两端分别为热管270的蒸发段和冷凝段。进一步地，如图4中所示，热管270的冷凝段的外周面被散热部210的基座212紧紧包裹；而热管270的蒸发段的外周面及顶表面被吸热部紧紧包裹。
罩设在热管270蒸发段上的吸热部呈桶状，且该吸热部可以进一步划分为一沿竖直方向设置于散热部210上的、筒状的第一热传导元件230及一封设该第一热传导元件230一开口端的第二热传导元件250。
该第一热传导元件230是设置于散热部210的上连接部2122之上的一个中空六棱柱结构，其具有六个外侧面232及一个圆柱状的内表面234。在第一热传导元件230的每一个外侧面232上，三个发光二极管110沿着第一热传导元件230的轴线方向排列成一条直线。该第一热传导元件230上形成有一贯穿孔234用以收容热管270的蒸发段，并使热管270蒸发段的外侧周面与贯穿孔234的内表面紧密贴合。
如上所述，热管270穿设于散热部210的基座212和第一热传导元件230内，使其外侧周面274被散热部210和第一热传导元件230紧紧包裹，并使其顶表面272外露于第一热传导元件230而与第二热传导元件250紧密贴合。
该第二热传导元件250为一六边形的板状结构，其具有一上表面252，用以承载三个发光二极管110及相应的电路板120。该第二热传导元件250的下表面254贴设于第一热传导元件230和热管270的顶表面272上方。
散热部210、第一热传导元件230、第二热传导元件250及热管270可通过焊接等方法相互连接而形成上述的散热模组200。将发光二极管110及相应的电路板120设置在吸热部的外表面，即第二热传导元件250的上表面252与第一热传导元件230的外侧面232，使得发光二极管110在吸热部上呈立体分布而形成一立体光源，可增强灯具的照明效果。其中，位于第二热传导元件250的上表面252的发光二极管110所产生的光线的照射方向，垂直于位于第一热传导元件230的外侧面232的发光二极管110所产生的光线的照射方向。
为进一步增强灯具的照明效果可在散热部210与灯罩400之间安装一反光罩300。该反光罩300为内凹的碗状结构，其包括一内凹的上表面(图中未标)，其中部设有一通孔(图中未示)。该反光罩300用以反射发光二极管模组100产生的光线，令发光二极管模组100产生的光线按照预定的方向照射以增强照明效果；例如图1中灯具所处的位置，该反光罩300可将发光二极管模组100产生的光线向上反射。
当发光二极管110在电路板120控制下产生光线时，光线被反光罩300汇聚到预定方向而起到照明的效果。与此同时，发光二极管110产生的热量被吸热部的第一热传导元件230、第二热传导元件250吸收。第一热传导元件230、第二热传导元件250吸收的热量通过热管270传递给基座212再通过其上的散热片214将热量散发到外部环境中去。如此，发光二极管110产生的热量可通过散热部210较大的散热面积散发到外部环境中去。这样一来，发光二极管110可工作于正常的温度范围内，可确保灯具的照明效果并延长使用寿命。
综上所述，本发明发光二极管灯具将一热管270设于散热部210的基座212及吸热部内，并令热管270的外侧周面274被该散热部210和吸热部包裹，增大了热管270与散热部210和吸热部之间的接触面积，有利于热管270与散热部210和吸热部之间的热交换作用，进而可充分利用热管270将发光二极管110产生的热量快速地转移到散热部210，进而提高了散热模组200的散热效率，可确保发光二极管110正常、稳定地工作。
图5所示为本发明另一实施例中发光二极管灯具中的散热模组200a的立体图。该散热模组200a与上一实施例中的散热模组200的结构相似，其也包括一中空的散热部210a、一设于散热部210a上的、中空的第一热传导元件230a、一设于第一热传导元件230a上的第二热传导元件250a，以及一热管(图中未示)，该热管以与上一实施例中相同的方式与其他元件连接组合。该散热模组200a与上一实施例中散热模组200之间的主要不同之处在于该散热部210a的外形轮廓为一四棱柱体，且第一热传导元件230a为一中空四棱柱体，而第二热传导元件250a相应地为一四边形板状结构。

Claims (9)

1.一种发光二极管灯具，包括一灯罩、位于灯罩内的若干发光二极管，以及一散热模组，其特征在于：该散热模组包括一位于灯罩内的吸热部、一位于灯罩外部的散热部，以及一连接吸热部与散热部的热管；该散热部包括一中空的基座及设于基座上的若干散热片；该热管穿设于散热部的基座及吸热部内，并被该散热部的基座及吸热部紧密包裹；吸热部上分布有所述发光二极管。
2.如权利要求1所述的发光二极管灯具，其特征在于：该基座的两端分别凸伸出有一环形连接部；其中，一环形连接部与一灯头连接，而另一环形连接部与吸热部连接。
3.如权利要求2所述的发光二极管灯具，其特征在于：该吸热部包括一组合于散热部上的一环形连接部上、且呈筒状的第一热传导元件及封设该第一热传导元件开口端的第二热传导元件；上述的发光二极管分布在第一热传导元件和第二热传导元件上。
4.如权利要求2所述的发光二极管灯具，其特征在于：还包括一套设于环形连接部上的反光罩，且该反光罩位于散热部和灯罩之间。
5.如权利要求1所述的发光二极管灯具，其特征在于：这些散热片自基座的外侧周面向外放射状延伸而出。
6.如权利要求5所述的发光二极管灯具，其特征在于：该散热部的外形呈圆柱状或棱柱状。
7.如权利要求6所述的发光二极管灯具，其特征在于：该第一热传导元件为一中空棱柱体。
8.如权利要求7所述的发光二极管灯具，其特征在于：该第二热传导元件为一板状结构。
9.如权利要求1所述的发光二极管灯具，其特征在于：该基座上具有一通孔；该热管呈圆柱状，其外径与基座的通孔的内径相当，且热管的外壁面贴合于基座的通孔和吸热部的内壁面上。
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