离心风机的风量调节方式很多，有进、出口风阀调节，蜗线风阀调节，进口叶片调节，动翼调节，转数调节等方式。对于各种不同类型的风机，由于调节方式不同，所得的节能效果差别很大。1、风阀调节离心风机出口风阀调节是改变管网的特性，而不是改变空调风机的特性。风量调节范围通常在风机额定性能曲线下方的所有工况。由于用人为加大管网阻力的方法来改变管网特性，压降消耗在关小风阀时产生的附加阻力上，调节的经济性差。进口风阀调节，当配管设置在风机的吸入侧时，其调节原理与出口风阀相同；但当配管设置在风机的排风侧时，它通过改变风机的进口压力，来改变风机的性能曲线，故调节的经济性好；而蜗线风阀调节，是通过变换风机的出口面积，来改变风机的特性，相对于风量的减少，功率变化小，节能不显著。这两种调节，原则上可使用在额定曲线下州苗木 保定电动门 保定空压机 化粪池模具 微型蠕动泵 保定强夯 收费岛模具的所有工况，能使喘振点向小流量方向偏移，因此，广泛地应用在一般具有固定转速的空调风机上。2、进口叶片调节进口叶片调节，是通过调节叶片，使吸入叶轮的气流方向变化
There are many ways to adjust the air volume of centrifugal fans, including inlet and outlet air valve adjustment, volute air valve adjustment, inlet blade adjustment, moving wing adjustment, and speed adjustment. For various types of fans, the energy-saving effects vary greatly due to different adjustment methods. 1. The adjustment of the air valve at the outlet of the centrifugal fan is to change the characteristics of the pipeline network, rather than changing the characteristics of the air conditioning fan. The range of air volume adjustment is usually below all operating conditions of the rated performance curve of the fan. Due to artificially increasing the resistance of the pipeline network to change its characteristics, the pressure drop is consumed by the additional resistance generated when the air valve is turned down, resulting in poor economic regulation. The adjustment principle of the inlet air valve is the same as that of the outlet air valve when the piping is set on the suction side of the fan; But when the piping is set on the exhaust side of the fan, it changes the performance curve of the fan by changing the inlet pressure of the fan, so the regulation has good economic efficiency; The adjustment of the spiral air valve is to change the characteristics of the fan by changing the outlet area of the fan. Compared to the reduction of air volume, the power change is small and energy-saving is not significant. These two types of regulation can be used in principle under all operating conditions under the rated curve, and can shift the surge point towards the direction of small flow. Therefore, they are widely used in air conditioning fans with fixed speed. 2. The adjustment of the inlet blades is achieved by adjusting the blades to change the direction of the airflow sucked into the impeller