实验室如何选择通风管道和通风柜呢？通风管道厂家为您讲解：
How do laboratories choose ventilation ducts and fume hoods? The ventilation duct manufacturer will explain to you:
造成实验室空气污染的主要原因就是在各种实验中散发的气体、烟雾和灰尘颗粒物。在英国，化学和有害物质的使用，被置于“有害物质使用管理规定”（C。O。S。H。H）的管理之下，COSHH规定，在实验室，任何可能造成空气污染的物质的使用都要在实验室通风柜内进行。有一台好的通风柜，必能达到事半功倍的效果。那么如何才能选择到一台好的通风柜呢？通风柜的好坏单从表面是看不出来的，须从它的内部进行解析：
The main cause of laboratory air pollution is the emission of gases, smoke, and dust particles in various experiments. In the UK, the use of chemicals and harmful substances is regulated by the "Hazardous Substance Use Management Regulations" (C.O.S.H.H.), and COSHH stipulates that any use of substances that may cause air pollution in laboratories must be carried out in laboratory fume hoods. A good fume hood can achieve twice the result with half the effort. So how can we choose a good fume hood? The quality of a fume hood cannot be seen from the surface alone, and it needs to be analyzed from its interior:
1、保证通风柜内的气体、烟雾和灰尘颗粒特不泄露于室内空气中。
1. Ensure that the gas, smoke, and dust particles inside the fume hood do not leak into the indoor air.
2、可燃气体在通风柜内不聚集。
2. Combustible gases do not accumulate in the fume hood.
3、保证实验室工作人员在通风橱前工作时，不受有害物质的侵害，万一玻璃门破裂时不被碎玻璃划伤。
3. Ensure that laboratory staff are not harmed by harmful substances when working in front of the fume hood, and avoid being scratched by broken glass in case the glass door breaks.
通风管道厂家
Ventilation duct manufacturer
4、所选通风柜有国际（国家）安全认证，设计符合人体工程学原理。
4. The selected fume hood has international (national) safety certification and is designed in accordance with ergonomic principles.
5、通风柜导流板设计是非常重要家庄电动伸缩门 保定桌椅  保定水处理设备 河北机械加工  保定养老院  保定防水的，好的导流板设计能使空气排放流畅，避免烟气积存。对于一般性的实验，通风柜表面网速不少于0。5m/s，而进行一些散发灰尘颗粒物的操作，表面网速则达到0。75m/s。
5. The design of the ventilation cabinet deflector is very important, and a good deflector design can ensure smooth air discharge and avoid smoke accumulation. For general experiments, the surface network speed of the fume hood should not be less than 0. 5m/s, while performing some operations that emit dust particles, the surface network speed reaches 0. 75m/s.