Q:How should an electric fan be used?

Turn on the fan too long, the body will cause discomfort. Body temperature will decrease with the evaporation of large amounts of sweat, over time, it is easy to cause cold, abdominal pain, diarrhea and other symptoms, to properly open, it is recommended to open for about 1 hours is appropriate.

Q:What is the working principle of an electric fan?

The main components of the electric fan are: AC motor. The working principle is that the energized coil rotates under the force of the magnetic field. Electrical energy is converted to mechanical energy, and, at the same time, due to coil resistance, it is inevitable that some of the electrical energy is converted into heat energy.

Q:How to measure the quality of fan motors with digital multimeter?

In the multimeter stalls placed in the 20M file, measuring winding (using the motor three lines in any one) and the motor stator core insulation resistance, the resistance should be above 2M, can determine the motor only problem

Q:What are the types of electric fans?

According to the structure of the motor can be divided into: a single-phase capacitor type single-phase, three-phase, shaded pole induction, DC and AC / DC series excitation commutator type electric fan.

Q:Can the electric fan blow to the notebook computer?

The cooling base effect is similar to that of an electric fan, but if one, the air duct will be better. After all, the bottom of the notebook is the air inlet. The best way to get rid of heat is to clean the dust and change the heat transfer cream

Q:Where does the wind from the electric fan come from?

The air passes through the fan blade, because it is oblique, and when the air passes, the fan leaves the air straight, while the other side takes a diagonal line with the blade

Q:How was the electric fan invented?

In 1880, Americans for the first time Shule blade is directly mounted on the motor, and then connected to the power supply, the rapid rotation of blades, the cool breeze blowing, this is the world's first electric fan.

Q:What is the principle of an automatic fan head swing back and forth?

There is a round at the rear of the fan. At the outer edge of the wheel, the shaft is connected to the frame by means of a connecting piece. The eccentric force produced by the rotation of the wheel acts on the frame and causes the fan to swing the head

Q:Why do most fans only have 3 blades?

We usually use the fan for axial fan, the blade is odd, this is because if the even shape symmetrical blades, and no adjustment of balance, it is easy to make the system resonance occurs, if the blade material is unable to resist fatigue due to vibration, will cause the blade or the spindle is broken, so odd pieces of the fan blade design on asymmetric multi axis design

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

Add a bit of grease to the axle, sew on the oil, or order some cooking oil