Public Spaces such as hospitals, schools, etc., are tall Spaces, the internal flow of people is large, the air circulation is not smooth, even if the central air conditioning is opened, the effect is not ideal, and the indoor and outdoor air is rapidly cold and hot exchange, resulting in a huge amount of energy consumption. The effective combination of large ceiling fans can fully and evenly mix the indoor air, and the cooling effect is remarkable, which plays a large role in energy saving and ventilation and cooling.