The DC centrifugal fan adopts a backward-curved impeller design, and the air volume-static pressure curve shows a stable downward trend without a stall-free zone, running smoothly throughout the entire working range. When adjusting speed, the air volume is proportional to the speed, the static pressure is proportional to the square of the speed, and the power is proportional to the cube of the speed. Following the classic Fan Affinity Laws, the energy-saving effect of speed adjustment is significant.









