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在变风量系统中有必要采用可变风量式的通风机。其风量的调节方式可根据其风量的调节范围和风压情况进行选择。在变风量系统中,为对送风机的风量进行控制,一般都是利用压力传感器使风管内有代表性的某一点处的静压保持一定,从而实现风管恒定静压的控制。在这种情况下,需要注意的是传感器的设置位置和压力的设定值。如果压力设定得高了,通风机的动力消耗便会增大,而且噪声也会提高。反之,如果压力定得过低,不能提供必要的风量,
It is necessary to use variable air volume fans in variable air volume systems. The adjustment method of the air volume can be selected according to the adjustment range of its air volume and the wind pressure conditions. In the variable air volume system, in order to control the air volume of the blower, a pressure sensor is generally used to maintain a certain static pressure at a certain point in the air pipe to achieve a constant static pressure control of the air pipe. In this case, it is necessary to pay attention to the setting position of the sensor and the setting value of the pressure. If the pressure is set high, the power consumption of the fan will increase and the noise will increase. Conversely, if the pressure is set too low, the necessary amount of air flow cannot be provided.