Principles of TV Heat Dissipation
The main heat generating components in television are the display and power supply, and the heat generated by the display is usually about twice that of the power supply. Therefore, the display has a significant impact on the heat dissipation performance of the television. The heat dissipation principle of television is based on three methods: heat conduction, heat convection, and heat radiation. The heat conduction mainly involves dissipating the heat generated inside the TV to the outside through heat dissipation structures such as fins, backplates, and pipes; Thermal convection is the process of promoting heat transfer through the flow of hot air through the internal fan of the television; And thermal radiation is when the temperature inside the TV rises and begins to dissipate heat outward.
How to effectively dissipate heat from a TV
1. Passive heat dissipation
Passive heat dissipation mainly relies on iron plate heat dissipation and body heat dissipation. Due to the compact design of TV boxes and limited internal space, the heat dissipation method is also limited. A common passive heat dissipation method is to use heat dissipation iron sheets to reduce the heat of major components such as CPUs through the principle of metal thermal conductivity. In addition, in order to further enhance the heat dissipation effect, some manufacturers will reserve heat dissipation holes on the box shell or use a metal body to accelerate the heat dissipation speed.
2. Active heat dissipation
Active heat dissipation is achieved by designing a heat dissipation module inside the TV box, such as an axial flow exhaust fan (heat dissipation fan). The heat dissipation performance of this method is significantly higher than that of passive heat dissipation, but it will increase the volume of the TV box. In addition, for the heat dissipation of power boards, a common solution is to use aluminum extruded heat sinks. However, due to the strong temperature resistance of MOS tubes, ordinary aluminum extruded heat sinks are usually used to reduce costs; For users, some DIY measures can also be taken to enhance the heat dissipation effect of the TV, such as opening a slightly larger circular hole on the cover behind the motherboard and fixing the fan on the back cover to help dissipate heat from the TV.
3. Thermal interface material for heat dissipation
The use of thermal conductive interface materials, such as thermal pad, thermal conductive gel and thermal grease, is an effective solution for TV heat dissipation. These materials effectively transfer heat by filling the gaps between the heating and cooling parts, thereby helping the TV maintain stable operation.
