Centrifugal impeller capable of changing airflow impact

A centrifugal impeller capable of changing airflow impact comprises an upper impeller body and a lower impeller body, a middle disc is arranged between the upper impeller body and the lower impeller body, the upper impeller body comprises a plurality of upper blades, the lower impeller body comprises a plurality of lower blades, the upper blades and the lower blades are arranged in a staggered mode, and the central angle opposite to every two adjacent upper blades or every two adjacent lower blades is alpha, the included angle between the upper blade and one adjacent lower blade is A, the included angle between the upper blade and the other adjacent lower blade is B, B = alpha-A, A: B = gamma, and gamma is larger than 0 and smaller than 1. The staggered angles of the upper and lower blades of the centrifugal impeller are non-uniformly distributed, namely, the angle A is not equal to the angle B. Compared with the traditional centrifugal impeller with the uniformly distributed staggered angles of the upper and