Centrifugal fan

Centrifugal fan is a mechanism that relies on the input of mechanical energy to increase the pressure of gas and discharge the gas. It is a kind of driven fluid machinery. Centrifugal fan is widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings ventilation, dust and cooling; industrial boilers and furnaces ventilation and air conditioning; cooling and ventilation equipment and household appliances in the air; grain drying and selected; wind tunnel wind source and hovercraft air and promotion.

Working principle: centrifugal fan is based on the principle of converting kinetic energy into potential energy, and accelerates the gas with high speed rotating impeller, then decelerates and changes the direction of flow, so that kinetic energy can be converted into potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from the axial direction, and the gas flows through the impeller into the radial direction and then enters the diffuser. In the diffuser, the gas changes the direction of the flow and increases the section area of the pipe to slow the air flow, which converts the kinetic energy into the pressure energy. The pressure increases mainly in the impeller, followed by the expansion process. In a multistage centrifugal fan, a reflux is used to make the air flow into the next impeller and produce higher pressure.