Brushless DC "Tiny Cooling Fan" control panel, which is the piece of circuit board control the power supply fan rotating, when the power is turned on, the power supply fan will reverse about 20 seconds, the internal power supply as well as "Tiny Cooling Fan" get rid of the dust, of course, if the internal power supply have relatively large dust particles (such as hair, fiber) invade the internal power supply, knocking chunks and dust will be difficult, so this method is very effective for small dust particles of dust. We are here to simulate the everyday use coffee sugar dust, dust particle size of this powdered sugar encountered in everyday use than to take on some of the dust, like the sugar also has a little adhesion, the use of such powdered sugar This can be a good simulation of the "Tiny Cooling Fan" dedusting capability.