Abstract: The centrifugal cooling system of the blender has a significant impact on its performance, especially on the temperature rise of the motor and electronic components on the circuit board. To improve the performance of the blender's centrifugal cooling system and reduce the temperature rise of core components, thereby extending the blender's service life, computational fluid dynamics and experiments were used to reconstruct and optimize the collector, volute, and blades of the centrifugal cooling system for a specific blender. The final reconstruction plan reduced backflow at the collector inlet, improved the diffusion capacity of the volute, and enhanced the working capacity of the blades. Experiments showed that the new centrifugal cooling system increased outlet flow by 16.3%, reduced motor temperature rise by 9.6 °C, and decreased overall aerodynamic noise by 1.1 dB. Provide theoretical and simulation guidance for the design and optimization of subsequent blender cooling systems.

Key words: Collector, Volute, Impeller, Centrifugal cooling system