Centrifugal Blower Fan

Centrifugal fans and blowers typically have one of eight types of wheels that draw the air into the inlet of the blower housing through the wheel and discharges it at 90 degrees out through the discharge of the housing.

Centrifugal blower fan.

Centrifugal blowers or fans are among the most efficient and versatile pieces of air moving equipment. The scroll housing in a centrifugal fan accelerates the air and changes the direction of the airflow twice a full 90 degree before leaving the housing. These fans increase the speed and volume of an air stream with the rotating impellers. In addition to material handling applications centrifugal air blowers are popular for the hvac industry and air pollution control systems.

It also adds kinetic energy to the air. Equipment cooling blowers create a more concentrated stream of air than equipment cooling fans to blow away the heat generated by electronic equipment induction heaters and high wattage bulbs. Direct drive fans have fewer moving parts than belt drive fans for less maintenance. How a centrifugal fan works the rotating fan blade creates a low pressure area at the center of the blade and a high pressure area at the edges of the blade.

The low pressure area at the center of the fan creates a vacuum that draws air into the fan. The two most common types of centrifugal blowers are pressure blowers and volume blowers.