What is the cooling design of LED street light

Traditional LED street lamp design mainly focus on the LED on the number of lumens, which focus on LED lamps and lanterns, heat dissipation is less. In fact, the LED on the number of lumens are rapidly increasing. In 2009, production of LED single tile lumens number has reached 100 lumens, and the numerical value is

traditional LED street lamp design mainly focus on the LED on the number of lumens, and focus on LED lamps and lanterns, heat dissipation is less. In fact, the LED on the number of lumens are rapidly increasing. In 2009, production of LED single tile lumens number has reached 100 lumens, and that figure is growing rapidly. And the matching theory of heat transfer system is mature, we can use the means of heat transfer and basic clear: conduction, convection, radiation, and phase change heat transfer. On the heat transfer or thermal problems, therefore, we can take measures are visible, limited. Cooling technology of LED street lamp cooling technology, the use of more general way for thermal conductive plate, is a 5 mm thick copper plate, is actually mean temperature board, LED street light, the heat source temperature drop; Also with a heat sink for cooling, but too much weight. Weight on the street lamp system is very important, because of the high street light is 9 meters, if too much risk increases, especially in typhoon, earthquake can cause accidents. Domestic manufacturers adopt the world's first needle cooling technology, acicular radiator cooling efficiency than conventional flake radiator has a great range, can make the LED junction temperature is lower than ordinary radiator more than 15 ℃, and the waterproof performance is better than ordinary aluminum radiator, also improved on the weight and volume. Cooling mode of the LED street lamp cooling ways mainly include: natural convection, adding fans forced cooling, heat pipe, and the loop heat pipe cooling, etc. Equipped with fans forced cooling way system complexity, low reliability, high heat pipe and the way of the loop heat pipe cooling costs. And street lamp which has outdoor use at night, the radiating surface is located in the lateral and smaller size restriction is beneficial to the advantages of the air natural convection, so the LED street lamp suggested that as far as possible choose natural convection cooling way. Thermal design of LED street light heat dissipation problems existing in the design are: heat dissipation fin area is set at random, unreasonable cooling fin arrangement, lamps and lanterns of the heat dissipation fin failed to consider the use of lamps and lanterns decorate way, affect the effect of fin, emphasis on heat exchange links, ignore the convection part, although many manufacturers to consider a variety of measures: loop heat pipe and heat pipe, thermal conductivity silicone grease, etc. , but don't realize ultimately depends on the surface area of lamps and lanterns, heat dispersion,. Ignore the balance of heat transfer, if the temperature of the fin uneven distribution is serious, will cause part of fin did not play a role or function is limited.