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Time：2022-04-22Views：0

Look at the random documents The random documents of each electric fan include the instruction manual, product certificate, electrical circuit diagram and packing list. When purchasing, check and check the quantity and quality of parts and components according to the packing list.

Check whether the grille and fan blades are obviously deformed: On the assembled electric fan grille, point a pen to the highest point of a fan blade, slowly move the fan blade, and the distance between the corresponding points of the other fan blades and the tip of the pen It should be very similar, and then turn the fan blade, pay attention to observe whether the rotation is brisk and flexible, and can stop at any position.

Check whether the control mechanism is flexible: the control mechanism includes speed control switch, timing knob, rocker switch, lighting switch, etc. These control mechanisms should be flexible in operation and reliable in contact. For the speed control gear, it is not allowed to have two gears connected at the same time or the phenomenon that the first gear cannot be pressed. Press the stop button, and each speed gear button should be reset normally.

Look at the performance of the moving parts: the fan head of the electric fan runs flexibly at all angles of elevation and elevation, and locks firmly. Adjust to the maximum depression angle or shake the head to the final position, and the grille shall not touch the fan prop. When the fan is running, the stability is better, it cannot be tipped over, and the shaking angle should not be lower than 60-80 degrees.

Look at the start-up performance: the start-up performance is an important quality indicator of the electric fan. During the inspection, it should be adjusted to the breeze gear, and when the rated voltage of the power supply is 85%, that is, the electric fan will be started when the voltage regulator is used to reduce the voltage from 220 volts to 187 volts. The electric fan should be able to start from a standstill and operate normally. The shorter the time required for the fan to start up to normal operation, the better the start-up performance of the fan motor.

Look at the operation and speed regulation performance: after power-on, turn the rocker switch back and forth several times to check whether it is out of order or the assembly is too tight. During this process, there should be no abnormal noise in the mechanical transmission part of the fan. When the electric fan is running in micro, medium and strong winds, the motor and fan blades should be stable, with little vibration and low noise. The fan should be agile when it shakes its head and stops, without intermittent, stagnant and jittering phenomena, and the speed difference between each gear should be obvious. When the fan is stopped, the axial clearance of the rotating shaft should not exceed 0.5 cm. If the clearance is too large, it will cause axial movement and impact sound during operation.

Check whether there is leakage: After the electric fan is powered on, if the hand touches a strong hemp inductance, use a test pen to test it, and the test pen will also light up and display, which can determine the leakage of the casing and cannot be used.

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