JP2009277542A - Heat radiation structure - Google Patents

Heat radiation structure Download PDF

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Publication number
JP2009277542A
JP2009277542A JP2008128455A JP2008128455A JP2009277542A JP 2009277542 A JP2009277542 A JP 2009277542A JP 2008128455 A JP2008128455 A JP 2008128455A JP 2008128455 A JP2008128455 A JP 2008128455A JP 2009277542 A JP2009277542 A JP 2009277542A
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heat
plate
radiation
light
guide tube
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Ching-Yuan Juan
慶源 阮
Kun-Jung Chang
昆榮 張
Kuo-Chun Lin
國俊 林
Ching-Yuan Ruan
慶煌 阮
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Li Hong Science & Technology C
Li-Hong Science & Technology Co Ltd
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Li Hong Science & Technology C
Li-Hong Science & Technology Co Ltd
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Priority to JP2008128455A priority Critical patent/JP2009277542A/en
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    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting

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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

<P>PROBLEM TO BE SOLVED: To provide a heat radiation structure mainly composed of a radiation lamp plate, a case, a light-guide tube, and a translucent film. <P>SOLUTION: The radiation lamp plate is composed of a radiation plate and a plurality of radiation lamp sets. On one side of the radiation lamp plate, a plurality of scaly radiation plates possessing a radiation effect are installed, a plurality of radiation lamp sets are fit on the other side, and a fit-in groove for fitting in the light-guide tube is provided around the radiation lamp sets. A translucent hole is provided for fitting in the radiation lamp plate on one side of the case, and an aperture is set on the other side for the light-guide tube to be penetrated into and fit into the groove of the radiation lamp plate. On one side of the light-guide tube, a pasting face is installed to be pasted on one side of the radiation lamp plate, and on the other side, a concentric circle-shaped flat face is provided to paste the translucent film. The translucent film is a half cover having a transparent effect, on one side of which a flat pasting part is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は放熱構造に関し、特にＬＥＤランプの高輝度化を利用した街灯の発熱構造に関する。   The present invention relates to a heat dissipating structure, and more particularly to a heat generating structure of a street lamp using high brightness of an LED lamp.

従来の街灯だと高い輝度を要求されるので、ほとんどは高い仕事率で大きなサイズの発光体を使用し、街灯のケースから放熱が行われる。しかしながら、この従来方式を実施すると、以下のような弊害があることが分かった。   Since conventional street lamps require high brightness, most of them use a large light-emitting body with high work efficiency, and heat is radiated from the street lamp case. However, it has been found that the implementation of this conventional method has the following adverse effects.

１、従来の街灯は仕事率が高く大きなサイズの発光体を使用しているので、消費電力は驚くほどの量である。日増しにエネルギー不足問題が切迫し、ますますエネルギーが貴重なものになってきているこの時代に、賢明な選択とはいえないだろう。 1. The conventional street lamp has a high work rate and uses a large-sized light emitter, so that the power consumption is surprising. It is not a wise choice in this era when energy shortages are urgently increasing and energy is increasingly precious.

２、従来の街灯は高い仕事率であるため、発光体が作動するときに生じる熱量はいうまでもないが、もしケースの放熱だけに頼った場合、ケースの温度が高くなりすぎてしまうか発光体が焼き切れてしまうだろう。 2. Since conventional street lamps have a high power, it goes without saying that the amount of heat generated when the light emitter is activated, but if only relying on the heat dissipation of the case, the case temperature will become too high or the light will be emitted. Your body will burn out.

本発明は、この設計により従来の街灯より優れた放熱構造を提供し、低仕事率、高輝度、高い放熱率を達成できる放熱構造を提供することを主な目的とする。   The main object of the present invention is to provide a heat dissipation structure that is superior to conventional street lamps by this design, and that can achieve a low work rate, high brightness, and a high heat dissipation rate.

本発明が運用する技術手段は放熱構造を提供するためにあり、主に放熱ランプ板、ケース、導光管及び透光性フィルムから成っている。前記放熱ランプ板は、放熱板及び複数個の放熱ランプセットから成っており、前記放熱板の片側には放熱効果をもつ複数個のうろこ状放熱材を有し、もう片側には複数個の放熱ランプセットが嵌め込まれている。放熱ランプセットの周りには嵌め込み溝が設置してあり、導光管を取り付けるのに用いられる。前記放熱ランプセットは複数個のヒートパイプ及びＬＥＤランプセットから成っている。前記ヒートパイプは伝熱効果をもつ真空の金属パイプであり、その一端にフラット部を有し、ＬＥＤランプセットを設置するのに用いられる。また、前記ケースは金属製のカバーであり、その片側には放熱ランプ板を設置するために用いられる透孔を有し、もう片側には、導光管を通し放熱ランプ板の嵌め込み溝に嵌め込むのに用いられる開口部を有している。前記導光管は真空管状であり、その片側には貼り合わせ面を有し、放熱板の片側と貼り合わせるために用いられ、もう片側にはフラット面を有し、透光性フィルムを貼り合わせるために用いられる。前記透光性フィルムは透光効果をもった半カバーであり、その片側にはフラット貼り付け部を有し、透光性フィルムを導光管のフラット面に貼り合わせ、両者をお互いに結合させるために用いられる。また、ケースの透孔は放熱ランプ板を設置するのに用いられるため、前記透孔の内側のサイズは放熱ランプ板の外側のサイズよりわずかに小さくなっていて、前記ケースの開口部は導光管の外側のサイズよりわずかに大きくなっている。   The technical means operated by the present invention is to provide a heat dissipation structure, and mainly consists of a heat dissipation lamp plate, a case, a light guide tube and a translucent film. The heat-radiating lamp plate includes a heat-radiating plate and a plurality of heat-dissipating lamp sets. The heat-radiating plate has a plurality of scaly heat-dissipating materials having a heat-dissipating effect on one side and a plurality of heat-dissipating materials on the other side. The lamp set is fitted. A fitting groove is provided around the heat-dissipating lamp set, and is used to attach the light guide tube. The heat radiation lamp set includes a plurality of heat pipes and an LED lamp set. The heat pipe is a vacuum metal pipe having a heat transfer effect, has a flat portion at one end thereof, and is used to install an LED lamp set. Further, the case is a metal cover, and has a through hole used for installing a heat radiation lamp plate on one side, and is fitted in a fitting groove of the heat radiation lamp plate through a light guide tube on the other side. It has an opening that is used to insert. The light guide tube is a vacuum tube, and has a bonding surface on one side and is used for bonding to one side of the heat sink, and has a flat surface on the other side and bonds a light-transmitting film. Used for. The translucent film is a semi-cover having a translucent effect, and has a flat pasting portion on one side thereof, and the translucent film is bonded to the flat surface of the light guide tube, and both are bonded to each other. Used for. Further, since the through hole of the case is used to install the heat dissipation lamp plate, the inner size of the through hole is slightly smaller than the outer size of the heat dissipation lamp plate, and the opening of the case has a light guide. Slightly larger than the outside size of the tube.

前述した本発明の放熱構造は、主に、以下に述べる効果を有する。   The above-described heat dissipation structure of the present invention mainly has the following effects.

１、放熱効率を高める：本発明は、伝熱部品をＬＥＤランプセットの片側の発熱源に直接貼り付けることにより、すばやく熱を伝えて放出するので、放熱効率を効果的に高めることができる。 1. Increasing heat dissipation efficiency: In the present invention, heat transfer components are directly attached to a heat generation source on one side of the LED lamp set, so that heat is quickly transmitted and released, so that the heat dissipation efficiency can be effectively increased.

２、コストの削減：本発明は直接ケースの上で使用するため、本発明が作動するとき、セット全ての構造から生じる熱量を全部放出することができるので、他の放熱方式を必要としない。   2. Cost reduction: Since the present invention is used directly on the case, when the present invention is operated, all the heat generated from the structure of the entire set can be released, so no other heat dissipation method is required.

図１、２、３、４で示しているように、本発明の放熱構造は、主に、放熱ランプ板１０、ケース２０、導光管３０及び透光性フィルム４０から成っている。前記放熱ランプ板１０は、放熱板１１と複数個の放熱ランプセット１２から成っていて、前記放熱板１１の片側には放熱効果を有する複数のうろこ状放熱材１１１が設置されていて，もう片側には，複数個の放熱ランプセット１２が嵌め込まれている。また、放熱ランプセット１２が周りに嵌め込まれた放熱板１１の上には、嵌め込み溝１１２が設置されていて、導光管３０を嵌め込むのに用いられる。そして、前記ケース２０は金属製のカバーであり、その片側には放熱ランプ板１０を設置するために用いられる透孔２１を有しており、もう片側には，開口部２２をしていて、導光管３０を通し放熱ランプ板１０の嵌め込み溝１１２に嵌め合わせるために用いられる。前記の導光管３０は真空管状になっていて、その片側には貼り合わせ面３１を有しており、放熱板１１の片側にある嵌め込み溝１１２を嵌め込むために用いられる。また、もう片側には、フラット面３２を有していて透光性フィルム４０を貼り合わせるのに用いられる。前記透光性フィルム４０は透光効果を有する半カバーであり、その片側にフラット貼り合わせ部４１を有し，透光性フィルム４０を導光管３０のフラット面３２に貼り合わせ両者を結合させるために用いられる。ケース２０の透孔２１は、放熱ランプ板１０を設置するのに用いられるため、前記の透孔２１の内側のサイズは放熱ランプ板１０の外側のサイズよりわずかに小さく、前記ケース２０の開口部２２は導光管３０の外側のサイズよりわずかに大きくなっている。   As shown in FIGS. 1, 2, 3, and 4, the heat dissipation structure of the present invention mainly includes a heat dissipation lamp plate 10, a case 20, a light guide tube 30, and a translucent film 40. The heat radiating lamp plate 10 includes a heat radiating plate 11 and a plurality of heat radiating lamp sets 12. A plurality of scaly heat radiating members 111 having a heat radiating effect are installed on one side of the heat radiating plate 11, and the other side. A plurality of heat dissipating lamp sets 12 are fitted. Further, a fitting groove 112 is provided on the heat radiation plate 11 around which the heat radiation lamp set 12 is fitted, and is used for fitting the light guide tube 30. The case 20 is a metal cover, and has a through hole 21 used for installing the heat radiation lamp plate 10 on one side, and an opening 22 on the other side. The light guide tube 30 is used to fit into the fitting groove 112 of the heat radiation lamp plate 10. The light guide tube 30 has a vacuum tube shape and has a bonding surface 31 on one side thereof. The light guide tube 30 is used for fitting a fitting groove 112 on one side of the heat radiating plate 11. Moreover, it has the flat surface 32 on the other side, and is used for bonding the translucent film 40 together. The translucent film 40 is a semi-cover having a translucent effect. The translucent film 40 has a flat laminating portion 41 on one side thereof, and the translucent film 40 is bonded to the flat surface 32 of the light guide tube 30 to couple them together. Used for. Since the through hole 21 of the case 20 is used to install the heat dissipation lamp plate 10, the inner size of the through hole 21 is slightly smaller than the outer size of the heat dissipation lamp plate 10, and the opening of the case 20 22 is slightly larger than the outside size of the light guide tube 30.

図５、６が示すように、前記放熱ランプセット１２は複数個のヒートパイプ１２１及びＬＥＤランプセット１２２から成っている。前記ヒートパイプ１２１は伝熱効果を有する真空の金属管であり、その一端の両側にはフラット部１２１１を有し、ＬＥＤランプセット１２２を設置するのに用いられる。また前記ＬＥＤランプセット１２２は、複数個のＬＥＤランプ、伝熱材、基板及び固定部品を重ね合わせたものであり、前記ＬＥＤランプの片側には極板があり、もう片側は発光ダイオードである。前記極板の片側の両端には電極が分けて設置してあり、発光ダイオードの周りには保護用の枠が取り付けられている。前記基板は配線を有するプリント回路板であり、その上にはＬＥＤランプを嵌め込むために用いられる複数個の透孔を有している。また、その片側には直列回路が設置されており、ＬＥＤランプを直列につなぎその輝度を増加させるために用いられる。前記基板上には複数個の穿孔を有しており、固定部品をそこに通して、基板を伝熱材にしっかり固定させるために用いられる。また、前記伝熱材は厚みと高い伝熱性を有した金属材であり、熱を伝える媒介の役割を果たし、ＬＥＤランプ極板の片側に貼り付けることで、ＬＥＤランプが作動した後に発生する熱量を放出させることができる。また、もう片側にはヒートパイプ１２１のフラット部１２１１に貼り付けられている。前記伝熱材の上には、複数個の固定穴を有しており、固定部品をしっかり取り付けることで伝熱材と基板を結合させるために用いられる。本発明の放熱ランプ板１０とケース２０の間はくっつけ合わせることができ、導光管３０と透光性フィルム４０の間もまた同様である。   As shown in FIGS. 5 and 6, the heat dissipation lamp set 12 includes a plurality of heat pipes 121 and LED lamp sets 122. The heat pipe 121 is a vacuum metal tube having a heat transfer effect. The heat pipe 121 has flat portions 1211 on both sides of one end thereof and is used to install the LED lamp set 122. The LED lamp set 122 is a stack of a plurality of LED lamps, a heat transfer material, a substrate, and a fixed part. The LED lamp has a plate on one side and a light emitting diode on the other side. Electrodes are separately provided at both ends of one side of the electrode plate, and a protective frame is attached around the light emitting diode. The substrate is a printed circuit board having wiring, and has a plurality of through holes used for fitting LED lamps thereon. In addition, a series circuit is installed on one side, which is used to connect the LED lamps in series and increase the brightness. A plurality of perforations are provided on the substrate, and are used for passing a fixing part therethrough to firmly fix the substrate to the heat transfer material. In addition, the heat transfer material is a metal material having a high thickness and high heat transfer, plays a role in transferring heat, and is attached to one side of the LED lamp electrode plate to generate heat generated after the LED lamp is activated. Can be released. The other side is attached to the flat portion 1211 of the heat pipe 121. The heat transfer material has a plurality of fixing holes, and is used for bonding the heat transfer material and the substrate by firmly attaching the fixing parts. The heat radiation lamp plate 10 and the case 20 of the present invention can be bonded together, and the same is true between the light guide tube 30 and the translucent film 40.

図５が示しているように、本発明の放熱構造を組み立てるためには、まず、複数個のＬＥＤランプを順序にそって基板の透孔内に嵌め込み、ＬＥＤランプの極板の片側を、直列回路を有する基板の片側に貼り付ける。次に、伝熱材の片側をＬＥＤランプ極板のもう片側に貼り合わせ、ＬＥＤランプが生じる熱量を伝熱材に伝えさせる。続いて、固定部品を基板の穴に通して、伝熱材の固定穴にしっかり固定させ、基板と伝熱材を結合させる。最後に、ヒートパイプ１２１の片側のフラット部１２１１を伝熱材の片側に貼り付ければよい。   As shown in FIG. 5, in order to assemble the heat dissipation structure of the present invention, first, a plurality of LED lamps are fitted in the through holes of the substrate in order, and one side of the electrode plate of the LED lamps is connected in series. Affixed to one side of the circuit board. Next, one side of the heat transfer material is bonded to the other side of the LED lamp electrode plate, and the amount of heat generated by the LED lamp is transmitted to the heat transfer material. Subsequently, the fixing component is passed through the hole of the substrate and firmly fixed to the fixing hole of the heat transfer material, and the substrate and the heat transfer material are combined. Finally, the flat portion 1211 on one side of the heat pipe 121 may be attached to one side of the heat transfer material.

図１、３、４、６で示しているように、ＬＥＤランプセット１２２とヒートパイプ１２１の組み立てを完成させる際には、放熱ランプセット１２全体の放熱効率を増加させるために、もう一つのヒートパイプ１２１を用意し、フラット１２１１部同士を重ね合わせる必要がある。また、放熱ランプセット１２を放熱板１１の片側に差し込んだ後に、放熱ランプ板１０をケース２０の透孔２１内に嵌め込む。続いて、導光管３０の貼り合わせ面３１をケース２０の開口部２２に通した後、それを放熱ランプ板１０の片側の嵌め込み溝１１２に嵌め込み固定させ、最後に、透光性フィルム４０の片側の貼り合わせフラット貼り付け部４１を、導光管３０の片側に取り付けているフラット面３２に貼り付ければよい。そして図７、８Ａ、８Ｂで示すように、また、図６を参照すると分かるように、本発明ヒートパイプ１２１は、外に開いた適切な角度θを採用していて、ＬＥＤランプセット１２２の光を外に向かって放出できるので、大きい照明面積を得ることができる。   As shown in FIGS. 1, 3, 4, and 6, when the assembly of the LED lamp set 122 and the heat pipe 121 is completed, another heat is used to increase the heat dissipation efficiency of the entire heat dissipation lamp set 12. It is necessary to prepare the pipe 121 and overlap the flat 1211 parts. Further, after the heat radiation lamp set 12 is inserted into one side of the heat radiation plate 11, the heat radiation lamp plate 10 is fitted into the through hole 21 of the case 20. Subsequently, after passing the bonding surface 31 of the light guide tube 30 through the opening portion 22 of the case 20, it is fitted and fixed in the fitting groove 112 on one side of the heat radiation lamp plate 10. What is necessary is just to affix the bonding flat sticking part 41 on one side to the flat surface 32 attached to one side of the light guide tube 30. As shown in FIGS. 7, 8 </ b> A, and 8 </ b> B, and as can be seen with reference to FIG. 6, the heat pipe 121 of the present invention adopts an appropriate angle θ that opens outwardly, Can be emitted toward the outside, so that a large illumination area can be obtained.

図９Ａが示すように、本発明の放熱ランプ板１０上には、ヒートパイプ１２１を差し込める差込管１３が複数個設置されている。ヒートパイプ１２１を前記差込管１３に差し込むことで、熱をすばやく放熱ランプ板１０とケース２０に伝え放出させる。また、図９Ｂ、９Ｃが示すように、前記差込管１３ａ、１３ｂは、必要に応じて放熱ランプ板１０ａ、１０ｂの片側、或いは両側に設置できるほか、図１０Ａ、１０Ｂ、１０Ｃが示すように、差込管１３ｃとケース２０ａを直接くっつけたり、前記差込管１３ｄ、１３ｅを必要に応じてケース２０ｂ、２０ｃの片側、或いは両側に設置することができる。従って、本発明の実施及び製作時の困難さを大きく低減させることができる。   As shown in FIG. 9A, a plurality of insertion tubes 13 into which the heat pipes 121 can be inserted are installed on the heat radiation lamp plate 10 of the present invention. By inserting the heat pipe 121 into the insertion tube 13, heat is quickly transferred to the heat-radiating lamp plate 10 and the case 20 and released. Further, as shown in FIGS. 9B and 9C, the insertion tubes 13a and 13b can be installed on one side or both sides of the heat-radiating lamp plates 10a and 10b as required, as shown in FIGS. 10A, 10B and 10C. The insertion tube 13c and the case 20a can be directly attached, or the insertion tubes 13d and 13e can be installed on one side or both sides of the cases 20b and 20c as required. Therefore, the difficulty in carrying out and manufacturing the present invention can be greatly reduced.

本発明の立体分解図。The three-dimensional exploded view of the present invention. 別の角度から見た本発明の立体分解図。The three-dimensional exploded view of this invention seen from another angle. 本発明放熱ランプ板の立体組立図。The three-dimensional assembly drawing of this invention heat radiation lamp board. 別の角度から見た本発明放熱ランプ板の立体組立図。The three-dimensional assembly drawing of this invention heat radiation lamp board seen from another angle. 本発明ＬＥＤランプセットの立体分解図。The three-dimensional exploded view of this invention LED lamp set. 本発明ＬＥＤランプセットとヒートパイプの立体分解図。The three-dimensional exploded view of this invention LED lamp set and a heat pipe. 本発明の立体組立図。The three-dimensional assembly drawing of this invention. 別の角度から見た本発明の立体組立図。The three-dimensional assembly drawing of this invention seen from another angle. 図８ＡのＡ−Ａ部分の断面図。Sectional drawing of the AA part of FIG. 8A. 本発明差込管の増設図。Expansion drawing of the present invention insertion tube. 本発明差込管の別の実施図。The another implementation drawing of this invention insertion pipe. 本発明差込管のもう一つの実施図。Another embodiment of the present invention plug-in tube. 本発明ケースの別の実施図。Another embodiment of the present invention case. 本発明ケースのもう一つの実施図。Another embodiment of the present invention case. 本発明ケースのもう一つ別の実施図。Another embodiment of the present invention case.

符号の説明Explanation of symbols

１０ 放熱ランプ板
１１ 放熱板
１２ 放熱ランプセット
２０ ケース
２１ 透孔
２２ 開口部
１１１ うろこ状放熱材
１１２ 嵌め込み溝
３０ 光導管
３１ 貼り合わせ面
３２ フラット面
４０ 透光性フィルム
４１ フラット貼り付け部
１２１ ヒートパイプ
１２２ ＬＥＤランプセット
１２１１ フラット部 DESCRIPTION OF SYMBOLS 10 Radiation lamp plate 11 Radiation plate 12 Radiation lamp set 20 Case 21 Through-hole 22 Opening part 111 Scale-shaped heat radiation material 112 Insertion groove 30 Optical conduit 31 Lamination surface 32 Flat surface 40 Translucent film 41 Flat adhesion part 121 Heat pipe 122 LED lamp set 1211 flat part

Claims (2)

放熱板と複数個の放熱ランプセットからなり、前記放熱板の片側には放熱効果を有するうろこ状放熱材が複数個設置され、もう片側には放熱ランプセットが嵌め込まれてあり、その放熱ランプセットの周囲には嵌め込み溝が設置された放熱ランプ板と、真空管状であり、片側には、放熱板の片側と貼り合わせるための面を有し、もう片側にはフラット面を有している導光管と、透光効果があり、片側には、透光性フィルムを導光管のフラット面に貼り付け両者を互いに結合させるために用いられるフラット貼り付け部が設置されている、半カバーの透光性フィルムと、金属製のカバーであり、その片側には放熱ランプ板を設置するための透孔を有し、もう片側には、導光管を貫通させ放熱ランプ板の嵌め込み溝に嵌め込むための開口部が設置されているケースなどを主に含むことを特徴とする放熱構造。 It consists of a radiator plate and a plurality of radiator lamp sets. A plurality of scaly radiators having a heat dissipation effect are installed on one side of the radiator plate, and a radiator lamp set is fitted on the other side. A heat dissipation lamp plate with a fitting groove around it and a vacuum tube. One side has a surface to be bonded to one side of the heat dissipation plate, and the other side has a flat surface. There is a light-transmitting effect with the light tube, and on one side, a translucent film is attached to the flat surface of the light guide tube and a flat pasting part used to bond the two together is installed. A light-transmitting film and a metal cover, with one side having a through-hole for installing a heat-dissipating lamp plate, and the other side penetrating a light guide tube and fitting into a fitting groove of the heat-dissipating lamp plate Opening for installation Heat dissipation structure characterized in that is comprises such a primarily is the case. 前記放熱ランプセットは複数個のヒートパイプと複数個のＬＥＤランプセットで構成され、前記ヒートパイプは伝熱効果を有する真空状の金属パイプであり、その一端はＬＥＤランプセットを設置するためのフラット部を有することを特徴とする請求項1に記載する放熱構造。 The heat dissipating lamp set includes a plurality of heat pipes and a plurality of LED lamp sets, and the heat pipe is a vacuum metal pipe having a heat transfer effect, and one end of the heat pipe is a flat for installing the LED lamp set. 2. The heat dissipation structure according to claim 1, further comprising a portion.
JP2008128455A 2008-05-15 2008-05-15 Heat radiation structure Pending JP2009277542A (en)

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