👉 Expellers are a type of electric fan that uses a motor to rotate a belt or disc and spin air around a small hole in it. The air then moves through a turbine, which is a spinning rotor, creating an electric current. The term "expeller" refers to this type of fan as it was originally designed for the purpose of extracting oil from wells, but over time has become popular for other applications such as removing waste materials or grinding food products. In terms of its function in the