Introduction to the knowledge of heat dissipation and light distribution of solar street light source

When it comes to LED light sources, the most important thing is heat dissipation and light distribution. In terms of heat dissipation, the heat dissipation methods of solar street light sources mainly include: heat radiation, heat conduction, heat convection and natural air cooling. Specifically, the heat generated by the LED light source is conducted to the heat dissipation aluminum, and then heat radiation and natural air cooling are carried out through the area of u200bu200bthe heat dissipation aluminum. When it comes to light distribution, it is mainly lenses and reflectors. Let's talk about the lens first: the lens is actually the secondary light distribution, and the lens is divided according to the material: silicone lens, PMMA, PC lens and glass lens; because the silicone lens has good temperature resistance and small size, the diameter is 3-10mm, so the It is directly encapsulated on the LED lamp beads; the lens used by our company is PMMA material, because this material has good temperature resistance, it is a large lens, and the quality is the best; while the PC material lens is produced The efficiency is high, but the light transmittance is slightly poor, and the temperature cannot exceed 110°; although the glass lens is resistant to high temperature, it is bulky, heavy, fragile, and has high production costs. According to the application, the lens can be divided into: a primary lens and a secondary lens. The primary lens is directly packaged on the LED chip, but its light distribution angle is up to 180°; while the light-emitting angle of the secondary lens can be adjusted arbitrarily. For the reflector, there is no lens that emits light well. Although the price is low, the temperature resistance is poor and the light is scattered.
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