Now the remote control "220V Cooling Fan" control actuators basically SCR. From the principle known SCR substantially equivalent to switching thyristor switch is equivalent to the breakdown. Power fans turn course. Fans how power? "220V Cooling Fan" may gradually be replaced by air-conditioning in family life, and its status has shrunk, but the air conditioning easy to cause a confined space, the air does not circulate, will make the indoor air is very bad. But "220V Cooling Fan" is different, they do not have to blow his head, there would be no problem.