Suction, filtration, and disinfection: The open-mouth suction system can effectively capture micro-particles such as droplets, aerosols, crushing, dust, and odors. The suction gas is filtered out by primary HEPA+ activated carbon for more than 5um Particles, secondary HEPA + activated carbon filters out particles larger than 0.3um, and the filtration efficiency is as high as 99.9%. The filtered gas is then sterilized by built-in UV and plasma to discharge clean gas.