How to correctly use the 24V DC Cooling Fan it?

First of all, "24V DC Cooling Fan" wind speed should not be too large: modern science believes that the best control in indoor wind speed of 0.2-0.5 m / s, especially in well-ventilated room and have an awful draft in place, fans of the wind speed More is not too large. Secondly, "iphone下载雷竞技 " inappropriate for people blowing straight: straight blow, wind cold easily invade the body, especially in frail or sweating, it is best to let a fan blow in one corner; there, fans should blow go, to use swing fans, for children, the elderly, frail people, but should use less "iphone下载雷竞技 " hair, because "evil of the Cou, the gas will empty", but can adjust fan indoor air, in order to indirectly cool.