The main heat dissipation method of LED high-power street lamps
The market position of traditional lighting lamps is being replaced by led high-power street lamps. The latter's mainstream position is becoming more and more prominent. Designers are very concerned about the lighting effects of high-power led lamps, and often not enough attention is paid to the temperature control of the led module group. As everyone knows, this is also a critical factor that affects the life of LED high-power street lights, and it is not undetectable.
First, the light energy conversion calculation of led high-power street lamps
We all know that the conversion rate of light to electricity of LED lights is 15% to 20%, and the remaining 80% is converted into heat energy, which will generate a lot of heat during its working stage. If multiple led modules are stacked into led high-power street lights, they will generate more heat and the heat dissipation system is not efficient enough, which will stretch the wavelength of the street lights, the actual effect of phosphors, accelerate the aging of the street lights, and greatly shorten the cost of the . Service life.
Second, the heat dissipation method of led high-power street lights
In general, the heat dissipation of will be through radiation, convection and heat conduction. However, the proportion of radiation heat dissipation is too small. We will focus on the two types of convection and conduction of led high-power street lights. In terms of form, the heat conduction of led street lamps is mainly affected by the radiator and the outer shell, and these two sectors determine the way of heat dissipation of more than 80%.
Third, the heat dissipation layout of LED high-power street lamps
LED street lamp heat dissipation, mainly heat dissipation by heat sink, Jiangsu Naite Lighting Electric Co., Ltd. is a manufacturer engaged in the production and design of solar street lamps and high-pole lamps. It has 20 years of solar street lamp production experience and builds the most professional solar street lamp manufacturer. Contact number : 13805257308. Therefore, the design and layout of the heat sink is particularly critical. The traditional LED street lamp heat sink is usually welded to the led module group. The back of the led module group is bonded with copper pillars, and MCPCB is linked under the copper pillars. The connection layout of the LED module group can quickly dissipate the heat generated by the LED module group to the air, ensuring the safe and unchanging operation of the LED street light.
Fourth, MCPCB that most affects heat dissipation efficiency
The design layout of MCPCB is the biggest factor that affects the heat dissipation efficiency of LED light sources. We can consider MCPCB as the heat sink of LED street lights. Researchers found that the heat dissipation effect of MCPCB is restricted by three design indicators. They are MCPCB fins. The distance between the fins, the height of the fins, the thickness of the fins, and the thickness of the bottom plate.
However, the heat dissipation function of these conditions is restricted by certain conditions. The thickness and spacing of the fins are as small as possible, but the manufacturing cost is restricted. The main function of the bottom plate is to conduct high-power
solar street lights. The heat generated by the module group is too thin or too thick to have a bad effect, so it is an important design task to extract the most valuable combination of them.
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