The heat dissipation of LED street lights is one of the key problems that need to be solved. It is not only directly related to the luminous efficiency of LEDs in actual work, but also because of the high brightness requirements and high heat generation of LED street lights, and the outdoor environment is relatively harsh, if the heat dissipation is not good It will directly lead to rapid aging of the LED and lower stability.

Usually street lamps are used outdoors, and must be waterproof and dustproof, so the lamps must also be sealed. However, the temperature of the water vapor in the lamp after sealing will exceed 100 degrees under extreme weather conditions, and the LED works continuously in such a high temperature environment. If the heat dissipation of the LED street lamp is not done well, the lamp will be extremely prone to damage or severe light decay. Maintenance costs will inevitably increase.

There are also some problems in the heat dissipation design of LED street lights: the area of the heat dissipation fins is set at will, the arrangement of the heat dissipation fins is unreasonable, and the arrangement of the heat dissipation fins of the lamps does not take into account the use of the lamps, which affects the effect of the fins. Emphasizes the heat conduction link, ignores the convection heat dissipation link, and ignores the uniformity of heat transfer. If the temperature distribution of the fins is severely uneven, some of the fins will not function.

The previous heat dissipation methods of LED radiators mainly include: natural convection heat dissipation, forced heat dissipation by adding fans, heat pipe and loop heat pipe heat dissipation, etc. The forced heat dissipation method of installing a fan has a complicated system and low reliability, and the heat dissipation method of heat pipe and loop heat pipe is costly. On the basis of outdoor use of street lights at night, the natural convection heat dissipation method has the advantages of natural convection heat dissipation due to the fact that the heat dissipation surface of the natural convection heat dissipation method is located on the side and the body shape is less restricted. Therefore, it is recommended to choose the natural convection heat dissipation method as much as possible.

From the above point of view, a good LED radiator must meet: reasonable structure, meet the various mechanical and electrical properties of the lamp (structural strength, protection level, high voltage and grounding test, etc.). The safety is convenient for the assembly of finished lamps and lanterns, and is convenient for lamp installation and maintenance. The design of lamps and lanterns should consider the adaptability and versatility of spare parts as much as possible (reduce costs, reduce inventory and facilitate material management).