One of the ways to classify the fans is according to the trajectory described by the air inside the fan. In this way there are centrifugal, axial and mixed flow or helicocentrifugal fans.
CENTRIFUGAL FANS
In centrifugal fans, the inlet air path is axial and the outlet air is parallel to the radial plane, that is, the air is blown out from the center of the impeller to the outside.
In turn, centrifugal fans can be single inlet and double inlet.
Centrifugal fans are suitable for applications where high-pressure, low-flow airflow is required, such as refrigeration, air conditioning and material transport systems.
AXIAL FANS
In axial fans, the air inlet and outlet is coaxial, that is, the air moves in a straight line through the fan shaft.
These fans are suitable for applications where high airflow and low pressures are required.
In turn, axial fans can be short-cased or long-cased depending on the length of its casing.
MIXED FLOW FANS
Mixed flow fans are also called helicocentrifugal fans because they have mixed characteristics between the two previous types.
Its impeller is designed to generate both axial and centrifugal flow, thus managing to move a large amount of air with a smooth and efficient flow. Potential applications include building ventilation systems, food processing, and paper manufacturing.
