The weather in summer is very hot, so many people who work or live indoors generally choose electric fans to cool down. However, there are also some problems when using electric fans, such as electric fan speed slow motor heating, etc., let's take a look with Xiaobian to see what is going on with electric fan speed slow motor heating, by the way, electricity What should I do if the fan speed is slow to start, and the electric fan does not rotate, there is a buzzing sound and it is hot.
1. What's the matter with the motor heating when the electric fan rotates slowly?
In summer, many families will use electric fans to cool themselves, but when using electric fans, they will encounter various problems, such as slow fan speed and motor heating, etc. Let's take a look at the electricity The fan speed is slow and the motor heats up.
1. The main working principle of the electric fan is that the energized coil rotates under force in the magnetic field. The electrical energy is converted into mechanical energy, and the fan blades are rotated. At the same time, due to the coil resistance, some heat energy will be generated, so the surface of the general electric fan will be hot if it is used for a long time.
2. The reasons for the electric fan itself may include that the fan blades may be too long, the internal resistance of the motor becomes larger, so that the fan blades cannot rotate normally; the overheating of the fan causes the motor's load capacity to deteriorate, resulting in the inability to rotate; the protection inside the motor Problems such as overheating and short circuit of the device. Another possibility is that the external power supply is not plugged in properly, or the switch is broken.
2. What should I do if the fan speed is slow to start
1. What should I do if the electric fan rotates slowly and cannot start? Generally, when the electric fan rotates slowly and cannot start, it is necessary to check the electric fan. First, check the external cause of the air conditioner, and then deal with it. If the electric fan is found to rotate slowly, it is necessary to turn off the power. Then on the rotor shaft of the fan blade. Add some lubricating oil to get the fan speeding up again.
2. Or you can disassemble the electric fan, especially the soft rubber head on the shelf, remove the part that fixes the electric fan, and the back cover also needs to be removed, and all the screws above must be removed, and then use a rag to remove the fan. Clean the leaves, add lubricating oil on the bearings, and then install the electric fan back. At this time, the slow speed of the electric fan is solved.
3. The slow start of the electric fan may also be caused by internal problems. The shaft sleeve may need to be replaced, and the capacitor inside may need to be replaced. If it is because the wire is damaged, the wire should be replaced in time. These problems require professionals. to repair.
3. The electric fan does not turn, there is a buzzing sound and it is hot
(1) The reason why the electric fan does not turn, there is a humming sound and is still hot
1. The motor rotor shaft of the fan is short of oil and is stuck;
2. The front and rear covers of the motor of the fan are biased, causing the rotor shaft to be stuck;
3. The starting capacitor is broken (or the capacity is reduced), causing the coil of the starting winding to have no current (or the current is too small), and the motor cannot rotate;
4. The start winding coil of the electric fan motor is open circuit. At this time, there is no current passing through the start winding, and it will not rotate, but just make a "hum, buzz" sound. You can use a slight force to turn the fan blade without power on to see if the motor rotates easily. If it can rotate easily, it is usually the fault of the starting capacitor and the starting winding. If it is hard to turn it is usually the reason why the rotor is stuck. Pay attention to safety when operating with power on.
(2) The solution to the humming sound and the hotness of the electric fan when it does not turn
1. Directly connect a new capacitor of the same type in parallel with the two ends of the original capacitor to see if the electric fan rotates.
2. Check the timing switch, gear selector switch, and anti-fall switch again to see if the contact is bad or damaged, and then replace it; these peripheral components are excluded. If they still do not turn, the motor must be broken.
3. Use the "multimeter" to electrically block the R×100 gear, first measure the motor wires connected to both ends of the capacitor to see if the "multimeter" has an indication, that is, check whether the total coil of the motor is connected, if not; it means that the motor is broken (coil The copper wire is blown); if it is turned on but still does not turn, it is necessary to further test the remaining wires to see if the motor has a partial short circuit in the coil;
4. Another common fault of the motor: mechanical fault, such as: the electric fan that has been used for several years is dirty and blocked; it is manifested that the shaft cannot be rotated by hand, and "gasoline" or "universal lubricating oil" can be used at the motor shaft Spray a few times to make the motor shaft rotate flexibly, tap the motor shaft lightly with a cross screwdriver until the rotation is very flexible.
