Diffuser rings are designed to do what in centrifugal fans?

Diffuser rings play a crucial role in the operation of centrifugal fans by increasing the total pressure of the air or gas being moved. The primary purpose of a diffuser is to convert the kinetic energy of the high-velocity air exiting the fan impeller into static pressure. This process enhances the efficiency of the fan and allows for better performance in various applications where increased airflow is necessary.

The design and functionality of centrifugal fans typically include the use of diffuser rings to ensure that as air exits the impeller, it slows down in a controlled manner, thereby increasing the pressure and allowing for effective system integration. This function demonstrates how diffuser rings are essential components of centrifugal fans, contradicting the statement that they should not be used in such systems. Understanding the role of diffuser rings helps in the effective design and troubleshooting of fan systems for optimal performance.