LED模组的玻璃散热结构及其优化
发布时间:2018-02-27 17:01
本文关键词: LED光源模组 玻璃散热器 热模拟 LED结温 热流密度 出处:《华中科技大学》2015年硕士论文 论文类型:学位论文
【摘要】:近些年来,由于LED具有响应时间快、发光效率高、使用寿命长等特点,其被广泛应用于照明领域、医疗等领域。可以预见,LED将会取代传统的白炽灯、节能灯,成为照明领域的主流。传统的散热材料各有优缺点。本文提出了使用普通玻璃作为散热器的想法,并提出了两种利用玻璃作为散热器的基本模型,即平板玻璃和玻璃管结构。对于平板玻璃LED光源模组,长度对结温的影响较小;平板玻璃LED模组的稳态最高温度随着平板玻璃宽度的增加而下降,而且在平板玻璃宽度超过12mm时下降趋势减缓;平板玻璃LED模组的稳态最高温度随着平板玻璃厚度的增加而下降,在平板玻璃厚度大于4mm时,这种下降趋势减缓。并设计了一款平板玻璃LED灯具,其最高热功率为1.26W,并且发现灯具的结温与放置方向的关系并不大,并制作了样品,测试了结温。对于玻璃管LED光源模组,对于一定直径的不封口的玻璃管散热器来说,会有一个最佳壁厚,这个壁厚随着直径的增加而增大;随着玻璃管直径的增加,玻璃管LED光源模组的最高结温整体呈下降趋势,下降趋势不断减缓;同样条件下,玻璃管不封口的模组的结温要比封口的结温要低;对于不封口的玻璃管光源模组,会存在一个结温最低的放置角度。设计了玻璃管散热的T6和T8 LED日光灯的模型,并证明这种日光灯结构是可行的。设计了3管和7管玻璃LED模组和灯具的结构,并制作样品、测试了结温。提出了使用大面积的导热能力强的材料作为导热材料,玻璃作为散热结构来解决高热流密度的情况。通过在平板玻璃LED光源模组中的光源下方增加一层0.3mm厚的铝合金板,至少可以使单位长度上最高热功率提高23%;将七玻璃管LED灯中间的一根玻璃管换成铝管,至少可以使最高热功率提高25%,将铝管换成与线型LED光源接触良好的铝芯时,最高热功率会更高。
[Abstract]:In recent years, because of its rapid response time, high luminous efficiency and long service life, LED has been widely used in lighting, medical and other fields. In this paper, the idea of using common glass as radiator is put forward, and two basic models of using glass as radiator are put forward. For the flat glass LED light source module, the length has little effect on the junction temperature, and the steady-state maximum temperature of the flat glass LED module decreases with the increase of the plate glass width. The steady state maximum temperature of flat glass LED module decreased with the increase of the thickness of flat glass, and when the thickness of flat glass was more than 4 mm, the decreasing trend of plate glass width was slowed down, and when the thickness of flat glass was more than 4 mm, the steady state maximum temperature of flat glass module decreased. A flat glass LED lamp with a maximum thermal power of 1.26W was designed, and it was found that the junction temperature of the lamp was not related to the orientation of the lamp. A sample was made to test the closing temperature. For the glass tube LED light source module, For an unsealed glass tube radiator of a certain diameter, there will be an optimum wall thickness, which increases with the increase of the diameter of the glass tube, and the maximum junction temperature of the glass tube LED light source module decreases as a whole with the increase of the diameter of the glass tube. The downward trend is slowing; under the same conditions, the junction temperature of the unsealed glass tube module is lower than that of the sealed glass tube light source module; for the unsealed glass tube light source module, The model of the glass tube T6 and T8 LED fluorescent lamp is designed and proved to be feasible. The structure of the 3 tube and 7 tube glass LED module and lamp is designed, and samples are made. Test end temperature. Proposed the use of large areas of thermal conductivity of materials as thermal conductive materials, Glass is used as a heat dissipation structure to solve the problem of high heat flux. By adding a layer of 0.3 mm thick aluminum alloy plate under the light source in the flat glass LED light source module, The maximum thermal power per unit length can be increased by at least 23%; if one glass tube in the middle of the seven glass tubes LED lamp is replaced by an aluminum tube, the maximum thermal power can be increased by at least 25%, and the aluminum tube can be replaced by an aluminum core in good contact with the linear LED light source. The maximum thermal power will be higher.
【学位授予单位】:华中科技大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TN312.8;TQ171.7
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