"220V Cooling Fan" should be read before using manual, electric fans to fully grasp the structure, performance and installation, use and maintenance methods and precautions. Desktop, floor fans must have safety ground wire three-pin plug and socket; the ceiling fan should be installed in a higher position, you can not install the ground wire. Electric fan blade is an important component, regardless of the installation, removal, scrub or use, must be strengthened to protect, prevent deformation. Operation of the function switch, button, knob, action can not be too much, too fast, can not press two buttons simultaneously. Ceiling Fan speed control knob should slowly rotate the order should not be screwed in between gear position, or easy to make a ceiling fan heat, burn. Fan of oil or fouling, should be promptly removed. Not use gasoline or strong alkaline cleaning, so as not to damage the surface of the paint component function. Fans such as occurs in the course of hot, abnormal burning smell, shaking his head not working, the speed slows down, such as failure, do not continue to use, should be promptly cut off the power maintenance. Favorites fans should be thoroughly cleared before surface oil, fouling, and wipe with a dry soft cloth, and then use kraft paper or a clean cloth wrapped. Storage place should be dry and well ventilated to avoid the squeeze. "220V Cooling Fan" major issues: the use of the process in order to reduce low-noise must note the following: System Impedance: Air flow resistance will cause air flow noise generation. Airflow turbulence: due to poor design of the flow channel of air turbulence caused by high-frequency noise will appear, if it does not improve the flow channel is difficult to have a qualitative improvement. "220V Cooling Fan" fan speed and size: the fan speed, the faster the better cooling effect, the larger the size of the fan air flow the greater the cooling effect is better. The larger the fan speed, the higher the noise, the greater the larger the size of the noise. Temperature rise: after reducing the temperature difference between the temperature rise, the cooling effect is reduced. Vibration: vibration will cause the fan noise increased, reducing life expectancy as well as the speed is reduced.