The workbench consists of chassis, high-efficiency filters, variable air volume blower group, medium-effect filters, work table, static dissipation ion gun and other major components. The chassis is made of thin steel plate with baking paint on the surface. The working area table is full stainless steel structure, the working table is movable installation, easy to clean. The worktable adopts direct control mode, with fan switch, lighting switch, static dissipative ion switch, direct control equipment. Principle of work purification workbench principle: clean environment is in a specific space, clean air (into the filtered air) according to the set direction of flow and the formation of. To airflow direction to points, the existing ultra-clean bench can be divided into vertical, from the inside out type and lateral type.