LED lamp cooling solution

by / Wednesday, 28 March 2018 / Published in Company Blog

To solve the problem of heat dissipation of LED lamps, two aspects are mainly used, before and after packaging, it can be understood that LED chips dissipate heat and heat the LEDs for a long time.

For the heat produced by the LED chip is always dispersed into the air through the housing of the light fixture. If the heat is not well, the heat capacity of the LED chip is very small, a little heat accumulation will cause the junction temperature of the chip to increase rapidly. If it works at a high temperature for a long time, its lifetime will be shortened quickly. However, this heat must be able to actually guide the chip to the outside air, there is many ways to go. Specifically, the heat produced by the LED chip comes out of its metal heatsink and passes through the solder to the PCB of the aluminum substrate before passing through the heat conductive paste to the aluminum heatsink. Therefore, the heat dissipation of LED lamps actually includes heat conduction and heat dissipation.

However, depending on the size of the power and the place of use, the heat dissipation of the LED lamp housing may have different options. Now there are mainly the following cooling methods:

Aluminum heatsink fins: This is the most common way to dissipate heat. Use aluminum heat sink fins as part of the housing to increase the heatsink area.

Thermal plastic shell: When the plastic shell are injected, it is filled with a thermal conductive material to increase the thermal conductivity and heat dissipation capacity of the plastic shell.

Air-fluid mechanics heat dissipation: Air-fluid mechanics uses the shape of the lamp housing to create convection air, which is the lowest cost, enhanced heat dissipation method.

The long-lived high-efficiency fan in the fan lamp shell enhances heat dissipation: the cost is low and the effect is good. However, changing the fan is more troublesome and it is not suitable for outdoor use. This kind of design is rare.

Heat pipe heat dissipation technology: The heat pipe uses heat pipe technology to conduct heat from the LED chip to the shell heatsink fins. This is a common design for large fixtures such as street lights.

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