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高层住宅从第1层到顶层共用一个烟道的状况相当普遍。当居住在下部楼层的居民炒菜时,开启抽油烟机,部分油烟会随着烟道内压力的增大,顺着上部楼层的抽油烟机管道倒灌入居室,给上部楼层住户带来诸多烦恼。为消除这种油烟倒灌现象,可采用给抽油烟机加装阀门的方法。在将抽油烟机的管子与烟道预留孔连接密封时,在烟道的预留孔上方,靠近管子顶部固定1根30毫米×20毫米木条,与管口齐平。在管口处用胶链连接阀板,阀板直径比管道直径大6～8毫米。阀板选择不可太轻,也不可过重。太轻影响使用
The situation where a high-rise apartment shares a flue from the first floor to the top floor is quite common. When the residents living on the lower floors turn on the range hoods, part of the fumes will flow into the living room along the range hoods of the upper floors along with the increase of the pressure in the flue. This will cause many annoyances to the upper floor residents. In order to eliminate this phenomenon of soot inversion, a method of adding a valve to a range hood may be used. When the hood of the cooker hood is connected with the reserved hole of the flue duct, a 30 mm x 20 mm wooden bar is fixed near the top of the pipe above the reserved hole of the flue pipe and is flush with the nozzle opening. At the mouth of the nozzle, the valve plate is connected with a plastic chain. The diameter of the valve plate is 6 to 8 mm larger than the diameter of the pipe. The choice of valve plate should not be too light nor too heavy. Too light to use