The utility model provides a dust collecting equipment of device is administered to unbalanced three phase, a phase line and the condenser between the condenser between the B phase line, B phase line and the C phase line and the condenser between A phase line and the C phase line all include following the same dust removal instrument separately: the dust removal instrument contain the column roll body, have the dull and stereotyped of a plurality of through -holes and can let the column roll body enclose the motor transmission system of the central line rotating of this roll body, the outer wall of column roll body on have a plurality of prominent plastics silks, the outer wall of plastics silk and column roll body between have the contained angle, still installing vertical span between the plastics silk with the cotton wool piece that vertical span is unanimous of plastics silk, the outer wall of cotton wool piece and column roll body between also have a contained angle. Such device has avoided prior art's various dust absorption to cover at the condenser can cause the defect of haring and influencing its performance to the condenser cover.