The weather is getting hotter and hotter, and it’s definitely time to get away from all kinds of cooling tools. We have air conditioning inside the house can blow, but not outside, this time handheld fans are a good choice, especially rechargeable handheld fans, so you can use a longer time. Then the small fan has a little fault, how can you disassemble it?
A small fan how to disassemble
1, first disassemble the base and handle.
2, find the small electric fan on the screw holes, and screwdriver unscrew the set screws, generally in the back there will be two screw holes.
3, unscrew the set screws to save, then you can remove the back cover, you can open with the help of fingernails or do not want the card hood.
4, at this time do not rush to disassemble the fan blade, because there are wires and circuit boards connected to the handle below. Unscrew the fixing screws on the circuit board, you can take out the fan blade, circuit board and battery.
5, installation in accordance with the method of disassembly reverse operation is good. However, it is still recommended to find professional electricians to operate.
Second, the small fan is disassembled and installed back to a loud sound
In this case, it is possible that the screws are not fully tightened, so that the fan blade will be loosened when rotating, and other parts of the friction will make a sound. Then there is the fan blade part of the problem, the fan blade is not installed properly, there will be sound when running. You can try to reinstall, you can also add some lubricant in the part of the shaft, so as to avoid friction when rotating, producing sound.
Third, how to choose a handheld fan
1. Select the product using brushless motor. Small handheld fans have two types of motors: brush motors and brushless motors. When the brush motor rotates, it relies on internal carbon brushes for mechanical commutation; while brushless motors rely on electronic commutation. In the same price products, brushless motor has a long life and low noise.
2. Know the battery capacity. If the manufacturer of the same type of product has a nominal battery capacity of 2600mA, but the price is lower than that of a similar product with a nominal battery capacity of 1200mA, the authenticity of the capacity is questionable. Please note whether the usage time of the small fan evaluated by the buyer matches that of the seller, and whether there are complaints about battery charging and other information in the bad reviews.
3. Whether the charging current is marked and a dedicated integrated battery charge management chip is apparently used.
4. Is there discharge protection against motor failure? Is there someone blocking the motor and causing damage, as the blocking current of the motor can be much higher than the normal operating current. This takes into account the load short circuit protection function in the product design. In addition, you can also check whether there is a heat problem in the relevant evaluation.
5. Make sure to purchase products that include lithium battery protection. Once the charge management and motor drive circuit has a problem, the lithium battery manager can protect the charging and discharging of the battery to ensure that the battery does not overcharge or over discharge. Once the lithium battery is overcharged or short-circuited, there is a risk of fire and explosion.
