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实验室装修讲解通风柜的罩面风速选定准则

实验室装修讲解通风柜的罩面风速选定准则

根据有害气体密度与空气密度大小的不同,通风柜的形式有很多,不同的地方应用不同形式的通风柜。通风柜主要形式包含:上部排风的通风柜,下部排风的通风柜,上下联合排风的通风柜。同时,还有节能型的供气式通风柜。

According to the harmful gas density and the density of the air of different size, there are many ventilation cabinet form ventilation cabinet, local application of different forms of different. Contains the main form of ventilation cabinet: ventilation cabinet is exhaust ventilation cabinet, a lower air exhaust, ventilation cabinet wind combined discharge of up and down. At the same time, supply ventilation cabinet and energy saving.

Hood face velocity ventilation cabinet is main technical index to measure the performance of fume hood, it refers to the exhaust hood of the average wind speed at the entrance opening doors, ventilation cabinet hood face velocity selection criterion is: we should make harmful gas cannot escape from the cabinet, but also to avoid the turbulence in the ventilation cabinet.

过高的罩面风速可导至排风柜内工作台上方空间内气流紊乱,污染物可能在柜内某个角落积聚,还有可能吹熄火焰,破坏正在进行的试验,过低的罩面风速势必造成污染物的逃逸,危害试验人员的安全。

High face velocity turbulence above the space station can work lead to exhaust air in the cabinet in the cabinet, pollutants may be in a corner to accumulate, and can blow out the flame, the test failure is ongoing, hood face velocity is too low will cause pollutants escape, hazard testing the safety of personnel.

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