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A healthy and safe work environment is crucial for improving work efficiency. Especially in laboratories, the use of various chemical substances often causes air pollution. Some substances not only smell bad, but are even harmful to health. Naturally, how to choose an appropriate ventilation device has become a topic that cannot be ignored in various laboratories. How to select ventilation ducts and Fume hood in laboratory? The ventilation duct manufacturer will explain to you:

造成實驗室空氣污染的主要原因就是在各種實驗中散發(fā)的氣體、煙霧和灰塵顆粒物。在英國，化學(xué)和有害物質(zhì)的使用，被置于“有害物質(zhì)使用管理規(guī)定”（C。O。S。H。H）的管理之下，COSHH規(guī)定，在實驗室，任何可能造成空氣污染的物質(zhì)的使用都要在實驗室通風(fēng)柜內(nèi)進(jìn)行。有一臺好的通風(fēng)柜，必能達(dá)到事半功倍的效果。那么如何才能選擇到一臺好的通風(fēng)柜呢？通風(fēng)柜的好壞單從表面是看不出來的，須從它的內(nèi)部進(jìn)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 hazardous substances is under the management of the "Management Regulations on the Use of Hazardous Substances" (C. O. S. H. H). COSHH stipulates that any substance that may cause air pollution in the laboratory must be used in the laboratory Fume hood. With a good Fume hood, you can get twice the result with half the effort. So how can we choose a good Fume hood? The quality list of Fume hood cannot be seen from the surface, but must be analyzed from its interior:

1、保證通風(fēng)柜內(nèi)的氣體、煙霧和灰塵顆粒特不泄露于室內(nèi)空氣中。

1. Ensure that the gas, smoke and dust particles in the Fume hood will not leak into the indoor air.

2、可燃?xì)怏w在通風(fēng)柜內(nèi)不聚集。

2. Combustible gas will not gather in the Fume hood.

3、保證實驗室工作人員在通風(fēng)櫥前工作時，不受有害物質(zhì)的侵害，萬一玻璃門破裂時不被碎玻璃劃傷。

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.

4、所選通風(fēng)柜有（國家）安全認(rèn)證，設(shè)計符合人體工程學(xué)原理。

4. The selected Fume hood has international (national) safety certification, and its design conforms to ergonomic principles.

5、通風(fēng)柜導(dǎo)流板設(shè)計是非常重要的，好的導(dǎo)流板設(shè)計能使空氣排放流暢，避免煙氣積存。對于一般性的實驗，通風(fēng)柜表面網(wǎng)速不少于0。5m/s，而進(jìn)行一些散發(fā)灰塵顆粒物的操作，表面網(wǎng)速則達(dá)到0。75m/s。

5. The design of Fume hood deflector is very important. A good deflector design can make the air discharge smooth and avoid smoke accumulation. For general experiments, the surface network speed of Fume hood shall not be less than 0. 5m/s, while performing some operations that emit dust particles, the surface network speed reaches 0. 75m/s.

6、通風(fēng)柜的水、電、氣路裝置均備，設(shè)計靈活，以免給用戶帶來不便和煩惱。

6. The water, electricity and air circuit devices of the Fume hood are all available, and the design is flexible to avoid inconvenience and trouble to users.

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