220V AC Cooling Fan surprised reading

"220V AC Cooling Fan" of many types, you can press the power, form, structure and other forms of classification.
Fans by using the power point: can be divided into AC, DC and AC and DC three categories. Most of the travel is generally used for the AC and DC fans. The most widely used, the largest number of single-phase "220V AC Cooling Fan".
In the form of the motor point: it can be divided into capacitor run type, shaded pole and series excited commutator categories.
According to the structure and use features point: can be divided into table fan, stand fan, wall fan, ceiling fan, fan, fan page, etc.
Press the blade point: can be divided into leaf "220V AC Cooling Fan" and no fan blades.
According to the complexity of the point: it can be divided into Simple, universal, high-grade type. Among them, the Simple "220V AC Cooling Fan" no governor mechanism, the popularity of high-end model with a governor mechanism having a speed, timing, adjust the angle of the probe, feelings automatic power failure, and other functions.