Centrifugal Blower Fan

Direct drive fans have fewer moving parts than belt drive fans for less maintenance.

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. It also adds kinetic energy to the air. The two most common types of centrifugal blowers are pressure blowers and volume blowers. 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 fans also known as centrifugal air blowers are one of the most widely used fans because it s more cost effective than axial fans and these fans are simpler in terms of construction. 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. Such a fan is also called a blower fan biscuit blower or squirrel cage fan because it looks like a hamster wheel. The low pressure area at the center of the fan creates a vacuum that draws air into the fan.

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 fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink.