The heat sink is a key component of the LED ceiling light, and its shape, volume, and heat dissipation surface area must be designed just right. The radiator is too small, the working temperature of the LED ceiling lamp is too high, which will affect the luminous efficiency and life; if the radiator is too large, it will consume more materials, increase the cost and weight of the product, and reduce the competitiveness of the product. It is important to design a suitable LED ceiling light radiator. The design of the heat sink has the following parts:
1. Clear the power of the LED ceiling light that needs to dissipate heat. Some parameters used in designing the heat sink: the specific heat of the metal, the thermal conductivity of the metal, the thermal resistance of the chip, the thermal resistance of the heat sink, and the thermal resistance of the surrounding air.
2. Determine the type of heat dissipation (natural convection cooling, strong wind cooling, heat pipe cooling, and other cooling methods). From the comparison of cost, the natural convection cooling cost is the lowest, the strong wind cooling is medium, the heat pipe heat dissipation cost is high, and the jet cooling cost is the highest.
3. Determine the maximum operating temperature allowed by the LED ceiling light (ambient temperature plus ceiling light permit temperature rise).
4. Calculate the volume of the heat sink, the heat sink area, and determine the shape of the heat sink.