Is there any difference between centrifugal fan and negative pressure fan?

　　What are the differences between centrifugal fans and negative pressure fans? Let me give you a detailed introduction.

　　 The difference between centrifugal fan and negative pressure fan:

　　Centrifugal fan is a kind of driven fluid machinery that relies on the input of mechanical energy to increase gas pressure and discharge gas.

The negative pressure fan is a cooling principle that uses air convection and negative pressure ventilation.It is a kind of natural air that is sucked in from the opposite of the installation site-the door or window, and the indoor hot gas is quickly forced out of the outdoor, any poor ventilation problems The machine can be improved, the cooling and ventilation effect can reach 90%-97%.

Is there any difference between centrifugal fan and negative pressure fan?

　　 Differences in principle and product features:

　　Centrifugal fan is based on the principle of conversion of kinetic energy into potential energy, using high-speed rotating impeller to accelerate gas, then decelerate, change the flow direction, so that kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction. When the gas flows through the impeller, it changes to radial direction and then enters the diffuser. In the diffuser, the gas changes the direction of flow and causes deceleration. This deceleration converts kinetic energy into pressure energy. The increase in pressure mainly occurs in the impeller, followed by the pressure expansion process. In a multi-stage centrifugal fan, a recirculator is used to make the airflow enter the next impeller, generating higher pressure.

The negative pressure fan adopts CAD/CAM design, which has the characteristics of low investment cost, large air volume, low noise, low energy consumption, stable operation, long life and high efficiency.The shutters automatically open and close to achieve dustproof, waterproof and beautiful appearance; It can be used for both air blowing and ventilation, and it is the best choice for cooling and ventilation in modern workshops. Environmentally friendly and energy-saving negative pressure fans will become the mainstream of the ventilation and cooling equipment market.