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　　Why does the hair dryer fan break down after one or two years of use

　　The main reasons for the malfunction of a hair dryer fan after one or two years of use are as follows.

　　From the perspective of mechanical structure, the bearings of the fan will continuously wear out during high-speed rotation. After one or two years of frequent use, the wear of the bearings will gradually accumulate, leading to an increase in clearance and affecting the rotational stability of the fan, which in turn will cause the fan to run smoothly or even stop rotating. Moreover, during use, impurities such as dust and hair may enter the interior of the fan, accumulating in bearings, blades, and other areas, increasing frictional resistance and accelerating component wear.

　　From the perspective of the motor, it is the power source of the fan. During long-term operation, the winding of the motor may gradually age due to the thermal effect of the current. Especially in devices such as hair dryers that perform heating and blowing simultaneously, the ambient temperature of the motor is high, which accelerates the aging of the winding insulation layer, leading to faults such as short circuits or open circuits in the winding, thereby affecting the normal operation of the motor and ultimately making the fan unable to work.

　　In terms of usage habits, if a hair dryer is frequently used continuously in a high-temperature environment for a long time, or if it is subjected to external impacts such as collisions or falls during use, it will cause damage to the fan and motor, shortening its service life.

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