The high-efficiency and clean air type fume hood does not require external pipelines,and is equipped with a built-in fan and filter,which directly extracts,adsorbs,and filters exhaust gas.It can control the diffusion of chemical gases from the source and collect the volatile gases into the filtration device in a short period of time.

　　The fume hood is equipped with high-efficiency fans,and various toxic and harmful gases and dust generated during experimental operations are adsorbed and filtered by high-efficiency molecular filters to form pure gas and discharged outside the hood,thereby achieving the purpose of purifying the air inside the hood and indoor air,and effectively protecting laboratory personnel from the inhalation hazards caused by chemical operations.

　　The effectiveness of efficient and clean air ventilation cabinets is not only related to their correct design,but also to their reasonable use and maintenance.Therefore,the following points should be noted:

　　1.During the experimental process,the experimental device that generates harmful substances should be placed at a location greater than 150mm from the operating opening of the cabinet inside the clean air ventilation cabinet to prevent the overflow of harmful substances.

　　2.The experimental device of the clean air type fume hood should not obstruct the exhaust slit.

　　3.After the experiment is completed,the fan should not be turned off immediately,it must be turned off after a few minutes.

　　4.Clean air type fume hoods should not be used as storage cabinets.

　　5.The interior of the clean air type fume hood should be regularly kept smooth and sealed,and should be regularly cleaned and cleaned.If there is any damage,it must be repaired in a timely manner.

　　6.Ventilation fans,ducts,and related accessories should be regularly inspected and maintained.

　　7.At regular intervals,it is necessary to measure and adjust the fume hood.