The material of the Self Clean Device is cold

roll steel, it contains fan, pre-filter and secondary or

HEPA filter. The Self Clean Device could adjust the wind

speed according to the actual circumstance. The

purification rank at air's exit can reach hundred rank

and at worktable could reach thousand rank. This device

has movable wheels and adjustable jack, so we could fix

up at a special place. It's very agility and convenient.

Because it takes a speed adjustable system, we can keep

a good purification state at a part of area.