The heat dissipation problem of street lamps cannot be delayed. Only by solving this problem can the performance of led street lamps be used. The heat dissipation is not only directly related to the luminous efficiency of the LED street lamp when it is actually working, but also because the new energy led street lamp has high brightness requirement, large heat generation, and is used in a harsh outdoor environment, if the heat dissipation is not good, the LED will rapidly age. In the design of new energy LED street lamps, the heat dissipation of the power LED itself is required, but the road lamps used in outdoor applications should have the necessary level of dustproof and waterproof (IP), and good IP protection often hinders the heat dissipation of the LED.
Solving these two conflicting but necessary problems must be an important aspect of road lighting design. At present, the materials used in the new energy LED street light radiator are basically metal materials, which are mainly considered in the following three aspects: 1. Good thermal conductivity. Metal has better heat transfer capability than other solid materials; 2. Easy to process. The metal has good ductility and relatively high temperature, and various processing techniques can be adopted; 3. Easy to obtain, and the price is relatively low. Another important point is the use of integrated aluminum die-casting heat-dissipating enclosure. New energy LED streetlights are usually designed with the outer casing and heat sink integrated to solve the problem of LED heating. Generally, aluminum or aluminum alloy, copper or copper alloy and other alloys with good thermal conductivity are used. .
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