The working opening of the all-steel fume hood has a great influence on the airflow distribution in the cabinet, and the airflow distribution directly affects the working effectiveness of the cabinet exhaust hood.

       All steel fume hoodThe specific functions are as follows:

        1. Release function: It should have a mechanism to absorb the harmful gases generated inside the cabinet by absorbing the gas outside the cabinet, dilute it and discharge it to the outside.

        2. Non-reverse flow function: The air flow generated by the exhaust fan in the cabinet should have the function of preventing harmful gases from flowing back into the room from the cabinet.      

        3. Separation function: There should be a non-sliding glass window in front of the cabinet to separate the inside and outside of the cabinet.

        4. Supplementary functions: There should be a channel or alternative device for inhaling air from outside the cabinet when discharging harmful gases.

        5. Wind speed control function: In order to prevent harmful gases from escaping in the cabinet, a specific inhalation speed is required.

        6. Heat resistance and acid and alkali corrosion resistance: Some all-steel fume hoods require electric furnaces, and some experiments produce a large amount of harmful gases such as acids and alkalis, which are highly corrosive. Its countertop, lining, side panels and selected water nozzles, air nozzles, etc. should all have anti-corrosion functions.