Heat dissipation method of downlight shell
In the evening, the LED wall washing lamp in the city lights up for a long time, adding a gorgeous color to the city. However, due to long-term continuous use, the temperature of the lamp body is very high. If the heat dissipation is not good and timely, the service life of LED lamp will be greatly reduced. Good led wall washing lamp shell has outstanding heat dissipation function, and there will be different processes according to the application occasions.
Heat conducting plastic shell
Fill the heat conduction material when the plastic shell is injected to increase the heat conduction and heat dissipation capacity of the plastic shell.
Surface radiation heat treatment
The surface of the lamp shell is radiated and heat treated. The simple method is to apply radiation radiation coating, which can take the heat away from the surface of the lamp shell by radiation.
Aerodynamics
Use the shape of lamp shell to produce convection air, which is the lowest cost way to strengthen heat dissipation.
Electric fan
The long-life and high-efficiency electric fan is used to strengthen the heat dissipation inside the lamp shell, with low cost and good effect. However, it is more difficult to change the fan, and it is not suitable for outdoor use. This kind of planning is relatively rare.
Heat pipe
The heat is transferred from the LED chip to the shell fin by the heat conduction tube technology. In large lamps, such as street lamps
Etc. are common planning.
Liquid bulb
The transparent liquid with high thermal conductivity is filled into the lamp bulb by using the liquid bulb packaging technology. This is now in addition to the reflective principle, the only use of LED chip out of the light surface heat conduction, heat dissipation technology.
Use of lamp caps
In household LED lamps with small power, the internal space of the lamp head is often used to place the heating driving circuit partially or completely. In this way, a lamp head with a larger metal surface, such as a screw end lamp head, can be used for heat dissipation, because the lamp head is closely connected with the metal electrode and the power cord of the lamp base. So part of the heat can be derived from this heat dissipation.
Integration of heat conduction and heat dissipation -- Application of high heat conduction ceramics
The purpose of heat dissipation of wall lamp shell is to reduce the working temperature of LED chip. Because there is a big difference between the expansion coefficient of LED chip and the expansion coefficient of metal heat conduction and heat dissipation data that we usually use, it is impossible to weld LED chip directly to prevent the damage of LED chip due to high temperature and low temperature thermal stress. New high thermal conductivity ceramic materials, thermal conductivity close to aluminum, and can adjust the expansion system to synchronize with LED chips. In this way, heat conduction and heat dissipation can be integrated, and the intermediate links of heat conduction can be reduced.
Article source: downlight shell manufacturerhttp://mushuren.cn/
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What is the heat dissipation method of downlight shell
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