What are the cooling solutions for LED?

LED light bulb cooling solution:? Solving the heat dissipation of LED bulbs mainly starts from two aspects before and after packaging, which can be understood as LED chip heat dissipation and LED bulb heat dissipation. ? The heat dissipation of LED chips is mainly related to the selection and technology of substrates and circuits, which will not be described here for the time being. ? This paper mainly introduces the heat dissipation of LED bulbs, because any LED will be made into a lamp, so the heat generated by the LED chip is always radiated into the air through the shell of the lamp. If the heat dissipation is not good, because the heat capacity of LED chip is very small, a little heat accumulation will make the junction temperature of the chip rise rapidly, and if it works at high temperature for a long time, its life will be shortened quickly. However, there are many ways to make this heat really export the chip to the outside air. ? Specifically, the heat generated by the LED chip comes out of its metal heat dissipation block, and is first transmitted to the PCB of the aluminum substrate through solder, and then passed through? The thermal paste reaches the aluminum radiator. Therefore, the heat dissipation of LED hotel lights actually includes two parts: heat conduction and heat dissipation. However, according to the different power and use places, the heat dissipation of LED lamp shell will have different choices. ? At present, there are mainly the following heat dissipation methods: 1. Aluminum fins: This is the most common cooling method. Aluminum fins are used as a part of the housing to increase the cooling area. ? 2. Heat-conducting plastic shell: During injection molding, heat-conducting materials are filled in the plastic shell to increase the heat conduction and heat dissipation capacity of the plastic shell. ? 3. Air hydrodynamics heat dissipation: Air hydrodynamics uses the shape of lamp shell to make convective air, which is the lowest cost way to strengthen heat dissipation. ? 4. Long-life and high-efficiency fans are used in the fan lamp housing to enhance heat dissipation: low cost and good effect. But changing the fan is more troublesome and not suitable for outdoor. This design is relatively rare. ? 5. Heat pipe heat dissipation technology: The heat pipe uses heat pipe technology to conduct heat from the LED chip to the heat sink of the shell. This is a common design of large lamps (such as street lamps). ? 6. Surface radiation heat dissipation treatment The surface of the lamp shell is subjected to radiation heat dissipation treatment: simply coated with radiation heat dissipation coating, the heat on the surface of the lamp shell can be taken away by radiation.