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二、风流的逆转如果在通风网路里(图2—1)风流只是在单一的压源(通风机造成的风压)作用下,则在正常连接的分支风路里,风流的方向将是固定的,而且与网路中其它诸分支风路的风阻以及通风机风压的大小无关。如果在通风网路里不但有正常连接的分支风路,而且也有角联连接的分支风路存在,例如有 ab 分支风路(图2—1)存在时,即使是在单一的通风机的作用下,在角联的分支风路里,由于其相邻分支风路的风阻不同,风流也可能向这个或那个方向流动。
Second, the reversal of the wind If the ventilation network (Figure 2-1) the wind is only a single pressure source (ventilator caused by the wind pressure), then in the normal connection of the branch air flow, the direction of the wind will be Fixed, but also with the other branches of the air duct wind resistance and the size of the ventilation fan has nothing to do. If there is not only a normally connected branch air passage but also a diagonal connection branch air passage in the ventilation net, for example, if there is an ab branch air passage (FIG. 2-1), even if it is a single ventilator In the case of a corner branch, the airflow may also flow in this or that direction due to the difference in the air resistance of the adjacent branch airways.