"220V Cooling Fan" of wind pressure and wind volume has been relatively easy to confuse the concept of many players, the simple, the pressure is the pressure of the wind, the greater the pressure, the greater the power of the wind, the more likely the chassis punching , air filter and other parts blown through. The wind can be understood as the same time the air flow through the fan size, at the same time, you can exchange more airflow to enhance heat dissipation. Relationship between pressure and air flow is relative, at the same speed, "220V Cooling Fan" the greater the pressure, then it's the smaller air volume, and vice versa. If you want to simultaneously increase the fan air volume and pressure, then in addition to the blade design, by increasing the speed of the method it is relatively simple. However, the ensuing "220V Cooling Fan" wind shear blades rotating at high speed voice and bearing friction sound and other noise problems are troublesome people.