Brushless "Inflatable Air Blower" structure divided into: oil structure, hydraulic structure, ceramic structure, ball structure. Maximum use of these types of structures, mainly oil structures fans: We all know that oil is the lubricant of our common, however, this "Inflatable Air Blower" took part in the grade of oil. High, medium and low grades of oil. Low-grade oil, it is relatively thin, pour out like water may be just a little yellow color, but also volatile. High-grade oil viscosity is better, not easily air to evaporate. Making it a longer life. The "Inflatable Air Blower" Jia Duojia less oil is a fan of the quality of a relationship. Oil adds a fan in operation, it is possible to put the oil thrown out. Oil less of it, it will make the life of the fan will not reach 2W hours.