What are the purchasing skills of electric fans?_Industry News_News

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What are the purchasing skills of electric fans?

Time：2022-05-09Views：0

1. 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.

2. Check whether the mesh cover and fan blades are obviously deformed. On the assembled electric fan mesh cover, use a pen to point to a higher point of a fan blade, slowly move the fan blade, and the corresponding points of the other fan blades are the tip of the pen. The distance 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.

3. 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.

4. 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 a larger 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, and it cannot be tipped over. The angle of the head should not be lower than 60-80 degrees.

5. Look at the startup performance The quality of startup performance is an important quality indicator of electric fans. During the inspection, it should be adjusted to the slow gear, and when the rated voltage of the power supply is 85%, that is, the electric fan should be started when the voltage regulator reduces 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 an electric fan to start to operate normally, the better the starting performance of the fan motor.

6. Look at the performance of operation and speed regulation. After the power is turned 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, the mechanical transmission part of the fan should not have abnormal noise. When the electric fan is running at high, medium and low speeds, 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 stops, 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.

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What are the purchasing skills of electric fans?