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.
Centrifugal blower fan.
These fans increase the speed and volume of an air stream with the rotating impellers.
The two most common types of centrifugal blowers are pressure blowers and volume blowers.
Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink.
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.
Centrifugal blowers or fans are among the most efficient and versatile pieces of air moving equipment.
Direct drive fans have fewer moving parts than belt drive fans for less maintenance.
In addition to material handling applications centrifugal air blowers are popular for the hvac industry and air pollution control systems.
The low pressure area at the center of the fan creates a vacuum that draws air into the fan.
Such a fan is also called a blower fan biscuit blower or squirrel cage fan because it looks like a hamster wheel.
It also adds kinetic energy to the air.