离心风机是凭借键入的机械动能，提升空气压力并列送空气的机械设备，这是一种从动的动力机械。离心风机普遍用以加工厂、煤矿、隧道施工、玻璃钢冷却塔、车子、船只和建筑物的自然通风、排尘和降温；加热炉和炉窑的自然通风和引风机；空调净化机器设备和家电机器设备中的制冷和排风；谷类的干燥和评选；风洞清宴和汽艇的打气和促进等。
Centrifugal fan is a kind of mechanical equipment that can raise air pressure and supply air by typing mechanical kinetic energy. It is a driven power machine. Centrifugal fan is generally used for natural ventilation, dust removal and cooling of processing plants, coal mines, tunnel construction, FRP cooling towers, cars, ships and buildings; Natural ventilation and induced draft fans for heating furnaces and kilns; Refrigeration and exhaust in air conditioning purification equipment and household appliance equipment; Drying and selection of grains; Ventilation and promotion of wind tunnel cleaning and motorboats.
离心风机本质是一种变总流量稳压设备。当转速比一定时，离心风机的工作压力-总流量基础理论曲线图应该是一条直线。考虑到内部结构损害，具体特性曲线是弯折的。离心风机中常造成的工作压力遭受进气口温度或密度变化的比较大危害。对一个已知的进气量，大进气口温度(空气的密度少)时发生的工作压力少。针对一条已知的负担与总流量特性曲线，会有一条输出功率与总流量特性曲线。当鼓风机以稳速运行时，针对一个已知的总流量，需要的效率随进气口温度的减少而上升.
Centrifugal fan is essentially a variable total flow pressure stabilizing device. When the speed ratio is fixed, the basic theoretical curve of centrifugal fan's working pressure total flow should be a straight line. Considering the internal structural damage, the specific characteristic curve is curved. The working pressure often caused by centrifugal fan is greatly damaged by the change of inlet temperature or density. For a known intake volume, a high intake temperature (low air density) results in less working pressure. For a known load and total flow characteristic curve, there will be an output power and total flow characteristic curve. When the blower operates at a steady speed, the required efficiency increases with a decrease in inlet temperature for a known total flow rate