Judging the rotation direction of the propeller in a cabinet centrifugal exhaust fan is a professional task that can be quite challenging. The rotation direction should be confirmed based on the relative position of the fan’s inlet, which is typically determined from the bearing side. Specifically, the rotation direction of the propeller can be either clockwise or counterclockwise.
Determining the Propeller Rotation Direction:
Counterclockwise Rotation:
When the impeller rotates counterclockwise, the fan’s outlet is located at the lower right. If the air is expelled horizontally, the outlet position is at left 0 degrees. If the air is expelled at a 45-degree angle, the outlet is at left 45 degrees; if the air is expelled vertically, the outlet points at 90 degrees (left 90 degrees).
Clockwise Rotation:
When the impeller rotates clockwise, the fan’s outlet is located at the lower left. If the air is expelled horizontally, the outlet position is at right 0 degrees. If the air is expelled at a 45-degree angle, the outlet is at right 45 degrees; if the air is expelled vertically, the outlet points at 90 degrees (right 90 degrees).
Precautions for Use and Purchase:
Once the rotation direction of the propeller is determined, a clockwise rotating fan is generally termed as “right-handed,” while a counterclockwise rotating fan is called “left-handed.” Therefore, when purchasing a cabinet centrifugal exhaust fan, it is important to confirm its rotation direction in advance. This confirmation is crucial to ensure correct installation and operation, avoiding performance issues caused by selecting the wrong direction.
Fan Outlet Angle:
By understanding the rotation direction and outlet angles, users can choose the appropriate fan based on their specific needs, ensuring optimal exhaust performance and the long-term stable operation of the equipment.