Q:How should an electric fan be used?

The electric fan is unfavorable to the person to blow, straight blows, the wind evil is easy to invade the body, especially when the body is weak or when sweating profusely, had better let the electric fan blow toward a corner.

Q:What are your misunderstanding blowing ？

Some people in order to cool as soon as possible, then the fan to the highest speed, that the wind big fun, antipyretic. That's not the right thing to do

Q:How to measure the speed of an electric fan conveniently and precisely?

If you have a variable frequency light, you can gradually increase the frequency until the first fan page is almost stationary, and then multiply by three to calculate the speed

Q:How much electricity does the ordinary fan use in a day?

If the fan power is 150 watts / hour, then use 3.6 kwh 24 hours a day

Q:Where does the fan drip the oil?

If the shaft is very dead, this method is not easy to use, it is necessary to completely disassemble the motor before refueling.

Q:Why does the fan seem to spin backwards when it spins?

Because the human eye to object displacement to distinguish between 0.1s, and 0.1s when the fan turn fast may turn 350 degrees, looks like reversal of 10 degrees, so add up, like upside down

Q:What are the advantages and disadvantages of the vaneless fan?

The base of a fan without leaves determines that the diameter of the fan blades inside it is usually small, so that the same amount of air as the ordinary fan must be made to turn the blade faster, so the noise will be greater

Q:Is the power consumption the same when the fan is used in different gears?

The maximum design speed is used as the design value, and the minimum speed deviates from the design value.Fan blade is also a sensitive load, the power of shaft and speed are three times, and the higher the speed, the greater the energy consumption

Q:How to do if the electric fan is noisy?

This requires the electric fan to be taken apart for cleaning

Q:Why can an electric fan choose only 123 winds, and this discrete value instead of zero to three continuous type?

A multi throw switch is cheaper than a rheostat