Fans {propeller-type fan} can cut air at an angle and push a spiral air wedge straight in front of fan blade. Propeller fans {fan} can move back and forth, using a crank linked to motor. Fans {centrifugal fan} can use a paddle wheel {impeller} in a casing, pull air in at center, and push air out straight.
Practical Affairs>Machine>Kinds>Electromechanical>Fan
7-Machine-Kinds-Electromechanical-Fan
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224