From the impedance angles, calculated levels of high-rise residential users hood open and a separate multi-user open hood combination, the amount of layers of user exhaust values and analyze their changing patterns. 从阻抗的角度入手,计算了高层住宅各层用户排油烟机单独开启和多层用户排油烟机组合开启时,各层用户排风量的数值,并分析其变化规律。