LED street light cooling technology, generally used for heat conduction board, is a 5mm thick copper plate, in fact, is the average temperature, the heat source is heating off; Weight in the street lamp system is very important, because the street lamp is 9 meters high, if too heavy danger increases, especially in the typhoon, earthquakes are likely to produce accidents. Domestic manufacturers use the world's first needle-like cooling technology, the heat dissipation efficiency of the needle-like radiator is much higher than that of the traditional chip radiator, which can make the LED junction temperature 15 Shan lower than the ordinary radiator, and the waterproof performance is better than the ordinary aluminum radiator, while the weight and volume are improved. In addition, the development of high-power LED lamps for the graphite radiator has a good thermal conductivity and heat dissipation.
The main heat dissipation methods include: natural convection heat dissipation, forced cooling of the fan, heat pipe and heat pipe of the loop. The system is complicated, the reliability is low, and the heat pipe and loop heat pipe heat dissipation method is expensive. and street lamps have outdoor night use, the radiator surface is located on the side and the size of the small limit is conducive to the natural convection of the advantages of air, so the LED street lamp recommended as far as possible to choose the natural convection heat mode.
LED street light Cooling design problems are: Heat dissipation fin area set randomly, heat fins layout is unreasonable, the layout of the radiator fins do not take into account the use of the lamp, affect the performance of the fin effect, emphasizing the heat conduction link, ignoring the convection heat link, although many manufacturers consider a variety of measures: heat pipe, loop heat pipe, plus thermal grease and so on, but did not realize that the heat ultimately depends on the surface area of the lamp to disperse. Ignoring the equilibrium of heat transfer, If the temperature distribution of fins is seriously uneven, it will cause a part of the fins to not play a role or a very limited role.