In recent years, in order to change the experimental environment, experiments conducted on the experimental bench have gradually been transferred to the fume hood, which requires it to have functions that are very suitable for the equipment. In particular, most new laboratories require air conditioning, so the number of fume hood units will be included in the air conditioning system plan during the preliminary design phase of the building. Because it occupies a very important position in the biochemistry laboratory, taking into account the changes in the laboratory environment, changes in labor hygiene conditions and the increase in work efficiency,Fume hoodThe number of units increased dramatically. Here are ventilation ducts, ducts, wiring, exhaust, and more. It has become an important topic in laboratory construction. What is its antiseptic effect?

        all-steel experimental bench is precision machined. Laboratory ventilation without duct ventilation does not require external ducts, does not pollute the external environment, and has little impact on the laboratory temperature. However, the disadvantage is that the filtered data needs to be replaced periodically.

        The experimenter is exposed to more harmful gases than when using a fume hood with an extraction device. The exhaust fan installed very close to the experimenter will produce noise. A vented fume hood pumps the air in the hood to another location where, after proper treatment, it is discharged into the atmosphere. This product is more effective at cleaning harmful gases in the laboratory than tubeless ventilation, with less noise and simpler protection. The disadvantage is that specific exhaust pipes need to be installed, which will prevent the laboratory from maintaining a constant temperature at different indoor and outdoor temperatures and is harmful to environmental health. The fume hood will sound an alarm when the front glass door is opened too wide to alert the operator. The speed of the exhaust fan and lights inside can be adjusted by switches. When using, stand or sit in front of the cabinet, lower the glass door as low as possible, and put your hand under the cabinet door to test. Because the exhaust fan exhausts air inward through the open door, harmful gases will not escape too much under normal circumstances. In the laboratory fume hood, some electric furnaces need to be installed, and some tests have shown that many harmful gases such as acids and alkalis are highly corrosive. Ventilated countertops, linings, side panels, water nozzles, air nozzles, etc. Should have anti-corrosion function.

        product exhaust fans produce airflow that will not reverse harmful bodies from the fume hood and into the room. In order to ensure the completion of this function, it is better to use a single pipe to connect the fume hood and the fume hood machine. If it cannot be connected by a single pipe, it is limited to parallel connections on the same floor and in the same room. The ventilation machine can be installed at the end of the move (or on top of the floor).

        In order to protect the fume hood, the exhaust fan should have the required static pressure, which is the frictional resistance of air passing through the ventilation duct. You also need to pay attention to noise issues when judging wind speed. When dealing with activities inside, noise will be generated when the air is within the range of 7-10m. Generally speaking, the noise constraint value of the laboratory (indoor background noise level) is 70dBA. Adding loading and unloading areas will reduce wind speeds and noise. Taking into account the handling costs and construction issues, it is necessary to carefully select the power of the handling and exhaust fans.