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A must-have item for the beginning of the school year - laptop heat sink


School has already started, have the party members selected their favorite laptop? You, who have already purchased your favorite laptop, must also be doing "soft decoration" for your laptop, buying a film? Buy a dustproof pad? Buy a protective shell? Please, is it okay for the laptop to have a heat sink.

Laptop heat sink is a device that extends the lifespan of a laptop. Its purpose is to allow the heat generated by the laptop to quickly diffuse to the outside of the computer, without affecting its functionality or causing corrosion to the computer wiring, in order to ensure the normal operation of the laptop.

Heat dissipation is actually a process of heat transfer - conduction, convection, radiation, and other methods. Usually, in desktop computers, air cooling technology is mainly used, including CPU, graphics card, power supply, and chassis cooling fans. In laptops, air cooling is still the main cooling method, and the majority of cooling methods are the combination of fan heat pipe and cooling plate. Many laptops on the market use aluminum magnesium alloy shells, which also play a certain role in heat dissipation. As we all know, there are generally cooling vents at the bottom of laptops, which can be inhaled or blown out, which are very important for the heat dissipation of laptops. Laptops are also designed with heat dissipation considerations in mind, often using foot pads to lift the body up. However, when the temperature is too high, it becomes more difficult.

There are two main cooling principles for the heat dissipation base of laptops: 1) The heat dissipation function is achieved solely through the thermal conductivity principle in physics. Placing a plastic or metal heat dissipation base at the bottom of the laptop and raising it to promote air circulation and heat radiation can achieve heat dissipation. 2) Install several additional cooling fans on the heat dissipation base to improve heat dissipation performance. This type of air-cooled heat dissipation method includes two types: suction and blowing. The difference between the two types of air supply lies in the different airflow forms. When blowing, turbulence is generated, which belongs to active heat dissipation. The wind pressure is high, but it is prone to resistance loss, such as the electric fan we use in summer; The laminar flow generated during air suction belongs to passive heat dissipation, with low air pressure but stable airflow, such as chassis fans. In theory, in an open environment, the heat transfer efficiency of turbulent flow is greater than that of laminar flow. However, the bottom of the laptop and the heat dissipation base actually form a closed space, so the general suction and heat dissipation method is more in line with the airflow design specifications. Most heat dissipation bases on the market have built-in suction fans.

The structure of a fan type heat dissipation base is generally composed of a metal or plastic shell and built-in 2-4 fans. The power supply scheme for the fans includes two options: power supply through a laptop USB interface and external power supply. Some products also have the function of expanding multiple USB ports. Most laptop cooling base fans adopt a suction type design, as this can minimize the impact of air disturbance and improve cooling efficiency.