Abstract: Based on the structure characteristics and working principle of the dust collecting system of IFD and air cleaner, it is expounded that the collection of dust by IFD has some advantages over traditional ESP electrostatic precipitator. At the same time, several common factors that affect the CADR of air cleaner, including circulating air volume, electric field intensity and installation location, are put forward, which are equipped with IFD device. The effect of these factors on the performance of air cleaner is analyzed. Finally, the rationalization suggestions on product design are summarized.

Key words: Air cleaner, IFD, Clean air delivery rate