Abstract: With the continuous improvement of energy efficiency standards for household air conditioners, the traditional fan cover has been difficult to meet the energy-saving requirements. To study the parameters of the circular fan cover blades used in the outdoor units of 10-horsepower high-volume air conditioners, fluid simulation and experimental verification were conducted on the three-dimensional modeling of the fan cover. The influence of the radial spacing and twist angle of the fan cover ribs on the ventilation volume of the fan cover was analyzed. The results show that the model optimization method based on CFX three-dimensional numerical simulation can effectively optimize the structural parameters of the fan cover. After optimization, the ventilation volume of the fan cover increased by 5.2% at the same fan speed, which is of great significance for reducing the flow loss in the air conditioner duct and improving the energy efficiency of the air conditioner.

Key words: Air conditioner, Fan guard, Airflow volume, Parameter optimization