Cyclonic system principle
  
    The air with dust goes into the mainframe through the pipeline. The high-speed air goes with the circular vortex of the dust barrel. While the centrifugal force of the swirl separates the bulky grain to the bottom of the dust pail, the light dust will be filtered through the filter bag. This kind of two-stage filter is better than the other filtering ways. Because only when the bulky grain is separated, the micro dust can reach the filter system, and the filter bag won’t be choked and the mainframe can offer the strongest suction for the longest time. The polypropylene antibacterial fiber is one of the best filtering qualities (97.5% at 0.1micron), and the air will be very clean after filtering. The filter bag can be washed when dirty, and it can be used repeatedly.

  
    According to the experiment, separating the dust mites, feces and other allergen, the filter medium fiber pore should be less 10um and shouldn’t be larger than 10um even after washed by the washing machine.