The working principle of dust collector accessories is that when the dusty gas enters the ash hopper of the dust collector, due to the sudden expansion of the airflow cross-section and the effect of the airflow distribution plate, some of the coarse particles in the airflow settle in the ash hopper under the action of dynamic and inertial forces; the fine particles with smaller density enter the filter room. Through the combined effects of Brownian diffusion and sieving, the dust is deposited on the surface of the filter material, and the purified gas enters the clean gas chamber and is discharged by the exhaust pipe through the fan.