| 摘要 |
The invention relates to an air flow rate adjusting method at the outlet of an air blowing device comprising a fan driven by a motor and connected to an air circuit, and means for varying a parameter (Vrms) of the supply voltage of the motor in order to vary its rotation speed. It is characterized by the following steps: generating information representative of the rotation speed of said motor or fan corresponding to a known value of said parameter of the supply voltage; determining from said known value of the parameter and said information and evolution law (PCi) of the flow rate as a function of said parameter, selected amongst a plurality of such laws (PCo-PCn) previously stored and corresponding to a plurality of different head losses in said air circuit; varying said parameter (Vx) according to said determined law so as to obtain at the outlet a flow rate equal to a set flow rate (Dc). The invention also relates to a device for implementing such method. |
