LB-JZ (D) mobile automatic cleaning welding smoke purifier is applicable to arc welding, carbon dioxide protection welding, the MAG welding, carbon arc gouging welding, gas Melting cut, special welding produce smoke workplace. Welding smoke exhaust fan gravitational by universal inhalation equipment vacuum hood air inlet device into outlet with a spark arrestor, sparks were delayed by the flame arrester, smoke gases into the settling chamber, the use of gravity with the upstream airflow, the first coarse dust directly down to the hopper, and particulate soot filter trap to the outer surface, clean gas purification by the cartridge filter from the center of the filter into the clean room, clean air is adsorbed by the activated carbon filter further purified by a The outlet is reached when the surface of the continuous deposition of dust in the cartridge, the cartridge inside and outside of the differential pressure is increasing, when the pressure reaches the pre-set value, the cartridge cleaning with compressed air pulse cleaning dust, compressed air blown through the nozzle to the inner surface of the cartridge, reverse high pressure air from the inside out to produce cis cartridge violent expansion, contraction, caused by shock and vibration, will be attached to the cartridge surface dust from falling into the dust gathers gray slot.