Rotating Screen Airfoil Blades Reduce Fan Clogging

The patent converts the stationary screen into a rotating screen that rotates with the centrifugal fan. This dynamic solution allows the screen to maintain contaminant blocking capability while preventing clogging through continuous rotation, thereby maintaining airflow efficiency without requiring frequent cleaning.

Instead of using a stationary screen that blocks contaminants but gets clogged, the patent inverts the approach by making the screen rotate with the fan. This inversion transforms the screen from a static barrier into a dynamic component that actively participates in the airflow generation, solving both the clogging and efficiency problems simultaneously.

The rotating screen maintains the safety function by preventing operator contact with moving parts while rotating with the fan. The continuous rotation prevents debris accumulation on one side, eliminating the need for frequent cleaning and reducing maintenance time while preserving safety.

The rotating screen is self-cleaning through its rotation, which continuously exposes all surfaces to the airflow and prevents debris from settling. This self-service mechanism eliminates the need for manual cleaning operations, reducing maintenance time and labor requirements.

The rotating screen dynamically adjusts its interaction with airflow and contaminants. As it rotates with the fan, it maintains contaminant blocking capability while allowing airflow to pass through more efficiently, reducing the pressure resistance compared to a stationary screen that creates a fixed barrier.

The rotating screen performs multiple functions simultaneously: it blocks contaminants, maintains operator safety, and promotes airflow efficiency. By integrating the screen into the rotating assembly, it becomes a multi-functional component that addresses all three requirements without the trade-offs of a stationary design.