The dust collector works as follows: the dust gas enters the filter cavity from the open flange at the bottom, the coarser particles fall off the pipe directly, and the dust gas is filtered by the filter. Dust is left on the white surface and clean air cavities are drained by the fan. When the dust on the surface of the filter bag continues to increase, the program controller starts to run, the pulse valve opens one by one, compressed air blows up the filter bag through the nozzle, removes dust, the filter bag suddenly expands, reverse air flow, so that the white surface is produced. The dust quickly leaves the filter bag and falls into the smoke canister, which is drained by the carrier load valve