The Structural Research And Optimizational Design On The Radiator Of LED Lamps

LED lights is a new type of green light source which have energy saving andenvironmental protection function. But due to the heat dissipation problem, it wouldproduce serious light failure phenomenon. So the heat dissipation of lighting hasbecame the bottleneck of popularization and application of LED light, how to studyheat dissipation structure and optimize design of LED lights, develop the light whichhave good heat dissipation function is the key of the research. This paper rely on themajor project ofscience and technology of Jilin province, combined with the practicalproduction requirements, systematically study the work content as follows:（1）In the first place, briefly introduce background and significance of topicselection，the research status of LED and the main content of this thesis. And then stepby step introduce some basic knowledge of LED, thermal transitive process oflighting, the junction temperature and thermal resistance. This part emphaticallydiscuss the thermal dissipation ways of LED, the effect of each cooling way, and thematerial and molding technology of the radiator.（2）On the basis of the previous theory, I measure temperature of the finnedradiator of LED lamps and simulate the temperature field of the lamps. Next thisthesis design four different types of finned radiator, along with the radiator used inabove-mentioned experiment, simulate the temperature field of these LED lampsthrough ANSYS, construct line through ORIGIN, and compare five different types ofjunction temperature of radiator. I find that the LED junction temperature can be reduced by changing the shape of the radiator under the condition of the same qualityand same thermal dissipation area. And I also find that put a layer thermal conductivematerials between the substrate and the radiator to make the heat distribution ofradiator more evenly, the thermal dissipation effect is better.（3）I mainly study the influence of single factor of finned radiator on thethermal dissipation effect, for example, the thickness of the base, the width of grooveand the number of groove. Next, put basal thickness, groove width, number ofgrooves, fin thickness, fin clearance as the experimental factors, obtains the primaryand secondary order of the influenced factors on the heat dissipation effect by usingthe method of orthogonal experiment: fin thickness> groove width> fin clearance>number of grooves> basal thickness. To optimize design of the finned radiator.Through the above study, reasonable radiator design not only can reduce thejunction temperature of LED, also can increase the life and cost saving. This paperwould provide the theoretical basis for research and development of high-power LEDlamps and lanterns in the future.