As the carrier of the light source, the heat dissipation design of the light is very important for the LED to play its advantages. If the heat dissipation efficiency of the lamp is designed to be high, not only can the service life of the LED be prolonged, but also the weight of the lamp can be reduced and its application range can be expanded. On the contrary, it will affect the use of LED advantages, and even become a bottleneck in its application.
There are usually two heat dissipation methods: the first is active heat dissipation, that is, heat dissipation is performed by forced cooling methods such as external fans, water cooling or heat pipe loops, microchannel refrigeration, semiconductor refrigeration, etc., which is characterized by high heat dissipation efficiency, the radiator is small in size and compact in structure. The disadvantage is that it will increase additional power consumption, and taking into account the requirements of the protection level of the lamp, it will also increase the difficulty of the lamp design; the second is passive heat dissipation, which mainly relies on the natural convection of the air, and the heat generated by the heat source is naturally transferred through the heat sink dissipated into the air, the heat dissipation effect is related to the size of the heat sink. This method has a simple structure, but the heat dissipation efficiency is relatively low. For the lighting system, because the heat dissipation method is easy to combine with the structure of the lamp, the structure is relatively simple and does not require additional power consumption. At the same time, due to the comprehensive considerations of processing, material costs, and maintenance factors, passive heat dissipation is used the overall cost is relatively low. At present, the mainstream direction is to adopt the second method, which can meet the heat dissipation requirements of the lighting system to the greatest extent by rationally designing the radiator, while saving costs to the greatest extent.
