"220V AC Cooling Fan" at work (assuming no heat transfer with the outside room) not only did not reduce the indoor temperature, it will rise. Let us analyze a temperature rise causes: "220V AC Cooling Fan" work, since the current through fan coil wire is resistance, it will inevitably produce heat outward heat, so the temperature It will rise. But why people will feel cool it? Because the body's surface have a lot of sweat, when after "220V AC Cooling Fan" Working together, the indoor air can flow together, so we can promote the rapid evaporation of sweat, combined with "evaporative need to absorb a lot of heat", so people will feel cool. Work: 1. Parallel fan: dual fan pressure parallel unchanged, but will increase the amount of wind. Therefore increase the amount of wind to increase the cooling effect, in the design of power if the heat is too small, you can consider increasing the fan to resolve. 2, the series fan: Results of the series fan is pressure to increase, but the wind changed. This approach is not to solve the heat problem, generally used in the past when much wind resistance adopted to ensure that the amount of wind.