This type of dust collector is a small de-dusting unit. During operation, dusty air gets into the dust hopper through the air inlet or into the filter bag through the flange opening, where it is filtered and cleaned before being led to the outlet through the cleaning chamber and then exhausted by the fan. Dust cleaning can be performed on a timed basis or automatically according to the resistance condition. This unit is widely used in the dusty air cleaning and treatment system for building, metallurgy, mining, chemical, coal and non-metallic mineral industries.