This machine is suitable for the dry low temperature,small particles of powder dust.Made of stainless steel and aluminium alloy,with good corroded-proof,no pollute the absorbing material,the most of the material can be recovered.The machine is consisted of anechoic-chamber,fan device,filter and powder storage.These 4 parts are combined with 4 groups of tie rods.Loosing these tie rods,they will separate layer by layer,which brings convenient for cleaning.It with silence-device,reduce the noise.This machine is settled the rectangle exit on the top,which can connect with the discharge duct of the workshop,and let the micropowder transpiration directly through the discharge duct to outside so a to keep the workshop clean.