The fume hood can not only provide a good experimental environment for the laboratory, but also better ensure the personal safety of the experimental personnel. During the experiment, the fume hood plays the role of exhaust and ventilation, and discharges harmful gases to prevent the staff in the laboratory from being exposed to some toxic, pathogenic or unknown chemical substances or organic gases and particles. , smoke, vapor, soot, dust and aerosols and other pollutants attack. Therefore, the