"Cooling Fan" is a new concept of fans, both air, refrigeration, heating and air purification, humidification and other functions into one, with water as a medium, can send cold air below room temperature, can also be sent out warm and humid wind. Compared with electric fans, air-conditioning fan and more fresh air, odor removal functions, and power is only about 60-80W, prices are also very friendly. Positioned between the air-conditioning fan and fan of this, the majority of wage earners and the old town residents, using it can avoid the annoyance meter trip, another cool carefree feeling.