In today's society, most of the luminous products will use LED lights, which has become an indispensable lighting tool in my life. But because of the long continuous use time, resulting in the lamp body temperature is very high, if not good heat dissipation, it will greatly reduce the service life of LED. Good LED light shell has a good heat dissipation function, but according to the different occasions, LED light shell will have different processes.
The most common method of heat dissipation is to use aluminum fins as part of the shell to increase the heat dissipation area. There are also thermal conductive materials filled in plastic shell injection molding, increase the thermal conductivity and heat dissipation capacity of plastic shell. Or use the surface of the lamp shell to do radiation heat dissipation treatment, simple is to apply radiation radiator paint, you can use the radiative LED street lamp shell radiation from the lamp shell surface. Or use the shape of the lamp shell to create convective air, which is the lowest cost way to strengthen heat dissipation. Or the lamp shell internal with a long life efficient fan to strengthen heat dissipation, low cost, good effect. But to change the fan is more trouble, also not suitable for outdoor, this design is relatively rare. Or use heat-conducting tube technology to direct heat from the LED chip to the shell fin. This is a common design. Or the liquid bulb packaging technology is used to fill the transparent liquid with high thermal conductivity into the bulb of the lamp body. This is currently in addition to the reflective principle, the only use of LED chip surface to heat conduction, heat dissipation technology. Or household type of small power LED lights, often use the internal space of the lamp head, the LED road lamp shell driving circuit in part or all. In this way, you can use a lamp holder with a larger metal surface like the screw cap to dissipate heat, because the lamp holder is closely connected to the metal electrode and the power line. So some of the heat can be derived from the heat dissipation. Or the purpose of the lamp shell heat dissipation is to reduce the working temperature of the LED chip, because the expansion coefficient of the LED chip and our commonly used metal thermal conductivity, heat dissipation material expansion coefficient gap is very large, can not be directly welded LED chip, so as to avoid high and low temperature thermal stress damage LED chip. The latest high thermal conductivity ceramic materials, thermal conductivity close to aluminum, expansion system can be adjusted to sync with the LED chip. In this way, heat conduction and heat dissipation can be integrated to reduce the intermediate link of heat conduction.
The above is the commonly used method to protect LED lights from overheating and burning out, which can greatly improve the service life of the lamp holder, so as to improve our efficiency in the work.
