对于较大面积的工业污染源或较强烈的污染扩散,采用吹吸式气流的吹吸罩来控制,不仅控制和排除污染的效果良好,而且比一般排气罩更节约排风量,更节省动力能耗。它的这种优越性可以从图1中的四幅气流试验照片看出;照片中上升的污染气流是相同的模拟污染气流(白色烟雾),图1, For large areas of industrial pollution sources or more intense pollution diffusion, the use of blowing and suction air blowing hoods to control, not only control and eliminate pollution, but also better than the general exhaust hood to save air, save power Energy consumption. Its superiority can be seen from the four airflow test pictures in Figure 1. The rising contaminated airflow in the photo is the same simulated contaminated airflow (white smoke), Figure 1,