Why are the fan blades of the cooling fan mostly singular?

  Cooling fans are generally not used separately and will be used with heat sinks. It consists of motor, bearing, blade, housing (including fixing hole), power plug and wire.

This is mainly due to the balance of the cooling fan operation and the effect of reducing the resonance as much as possible. The singular fan blade is the best choice, and it is difficult to balance the double-numbered blade symmetry points on the mold. So for the cooling fan, it is not a good thing to be a double. The motor is the core of the cooling fan, generally consisting of a stator and a rotor. The bearing consists of three major components.

In the choice of cooling fan, we tend to compare the wind pressure and air volume. The wind pressure and air volume are for normal ventilation. It is necessary to overcome the resistance in the ventilation stroke of the cooling fan. The cooling fan must generate the pressure to overcome the air supply resistance. This is the wind pressure. . Wind pressure is an important indicator to measure the performance of the cooling fan. The wind pressure mainly depends on the shape, area, height and speed of the air duct and the fan blade. The faster the speed, the larger the fan blade, the larger the wind pressure, and the heat sink of the duct design. It can also better maintain the wind pressure of the fan.