按国标《通风机空气动力学性能试验方法》的规定和要求，在某型号通风机上进行了出口节流与进口节流的对比实验，得出了与传统观点不一致的结果：只有当入口节流调节在风机的入口前形成强制正预族流动的特殊情况下，入口节流调节才会比出口节流调节省电，其余情况均是出口节流比人口节流调节省电。 According to the national standard “Ventilator Aerodynamic Performance Test Method” requirements and requirements, in a certain type of fan on the export throttling and import throttling comparative experiments, obtained with the traditional view is inconsistent results: only when the inlet throttling In the special case of regulating forced positive pre-family flow in front of the inlet of the fan, the inlet throttling regulation will save energy than the throttling of the outlet throttling. In the remaining cases, the outlet throttling is more economical than the population throttling regulation.