Kneel down and beg for the basics of the fan! How does a fan work?

The three coils produce an unbalanced magnetic field. It's turned.

Add a switch. You can control whether you turn or not.

Add a stator. You can turn it off at a time.

Add a single-chip microcomputer, you can display the time, and turn on the machine regularly.

The working principle of the electric fan is that the energized coil in the AC motor rotates under the force of the magnetic field, converts the electrical energy into mechanical energy, and the electric fan makes the surrounding air flow, prompting the sweat secreted by the first class to evaporate, take away the heat in the body, and achieve the purpose of cooling the body.

How the electric fan works:

Electric fans have two engines that are only pneumatically connected and have concentric shaft rotors, called twin-rotor turbofan engines. Its operating principle and structural characteristics are basically the same as those of a twin-rotor turbojet engine.

In a twin-rotor turbofan engine, the compressor is called a high-pressure compressor because the pressure at the inlet air of the compressor behind the fan is the pressure at the outlet of the fan, which is much higher than the atmospheric pressure.

The turbine behind the combustion chamber that drives the high-pressure compressor is called a high-pressure turbine, which is composed of a high-pressure compressor rotor and a high-pressure turbine rotor. The turbine that drives the fan behind the high-pressure turbine is called a low-pressure turbine, and a low-pressure rotor consists of a fan rotor and a low-pressure turbine rotor.

The main component of the electric fan is: AC motor. Here's how it works:

The energized coil rotates by force in a magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and at the same time, because the coil has resistance, it is inevitable that some electrical energy will be converted into thermal energy.

There is a lot of sweat on the surface of the human body, and when the electric fan is working, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

1.The working principle of the fan is that the energized coil in the AC motor rotates under force in a magnetic field. Electrical energy is converted into mechanical energy, and at the same time, due to the resistance of the coil, it is inevitable that some of the electrical energy will be converted into thermal energy.

2.When the fan is working, the temperature in the room not only does not decrease, but rises. Here's why:

When the fan is working, the conductor is resistive due to the current passing through the coil of the fan, so it will inevitably generate heat and increase the surrounding temperature. However, the fan makes the surrounding air flow, which causes the sweat secreted by ** to evaporate, taking away the heat in the body to achieve the purpose of cooling the body. However, the indoor air temperature does not decrease, so after using the fan for a while, its cooling sensation will decrease.

02.Computer motherboard fan working principle and standard specification interpretation (PWM)--fan structure introduction 01

An electric fan consists of fan blades, a grille, a base, an electrical control, and a fan motor (Figure 5-2).

Figure 5-2 Structural diagram of an electric fan.

1.Front grille 2Grille ring 3

Fan blade fixing nut 4Fan blade 5Triangle nut 6

Rear grille 7Motor shaft 8Cover plate 9

Motor rear cover 10Control box 11Clamping screw 12

Lifting lock nut 13Base 14Pressing plate 15

Column 16Lift pipe 17Remote control.

Now at the turn of spring and summer, when summer comes, many people will prepare for summer in advance, such as buying summer clothes, summer sleeping mats, electric fans, and air conditioners and refrigerators, etc., so today it is important to talk about electric fans, talk about the working principle of electric fans and the types of electric fans, friends who are interested or are planning to buy will follow and look down.

How the electric fan works:

The main component of the electric fan in daily use is the AC motor, which is a motor that plays a key role in the electric fan. The most basic working principle is that the coil after the electricity is subjected to the force through the magnetic field to rotate, which also has the conversion of energy, and the electric energy after the electricity is converted into mechanical energy, because the coil after the conduction has a certain resistance, and it is inevitable that there will be a part of the electrical energy converted into thermal energy. First of all, we assume that there is no mutual heat transfer between the room where the electric fan is placed and the outside world, so when the electric fan is working, the indoor temperature will not decrease correspondingly, but will increase the indoor temperature.

The reason is that when the electric fan is working, the current passes through the coil in the electric fan, and the connected wires have a certain resistance, so some heat will be generated to the outside world, so the indoor temperature will become higher.

Another friend asked, why do some people still feel cool when the indoor temperature rises? In fact, this is because when people blow the electric fan, there is a lot of sweat on the surface, when the electric fan officially starts to work, the indoor air will flow with the blowing of the electric fan, so that the sweat on the human body can evaporate well, and when the sweat evaporates, it needs to absorb a lot of heat to carry out, so people will feel very cool when blowing the electric fan.

Types of electric fans:

Electric fans can be divided into three-phase induction type, single-phase capacitive type, DC and AC type according to the structure of the motor.

It can also be classified according to the use: industrial exhaust fan and household electric air Qi and Hu fan. Household electric fans generally include top fans, floor fans, air conditioning fans, ceiling fans, page fans, ventilation fans, etc.

There is almost only one type of industrial exhaust fan, which is mainly used to force air for convection.

Well, the above is to introduce the working principle of the electric fan for you, do you feel that you have grown some knowledge after reading what you said? I hope that the content introduced above will be helpful to you.

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<> Introduction: Usually a hand-held semi-automatic small fan, its appearance is close to the electric small hand-held fan, the difference is that the power is a simple device for a person to rework hand pressure, which can be directly converted into mechanical energy or converted into electrical energy and stored in the built-in small battery or external battery that can be installed in the pressure fan, and its working principle can be referred to and the pressure flashlight.

Advantages: Environmentally friendly and easy to crack.

Fan: A fan is a device used to generate wind and cool down on a hot day. The electric fan is a device that is driven by electricity to generate clear and closed airflow, and the fan configured in it rotates into natural wind after being energized to achieve the effect of cooling.

Rotor: composed of magnets, fan blades and shafts;

Stator: composed of silicon steel sheet, spool and bearing;

Control circuit: by IC induction magnet; The pole is controlled by a circuit and its coil is turned on to generate internal excitation to rotate the rotor.

The main trembling component of the electric fan is: AC motor.

The working principle is cavity: the energized coil rotates under force in a magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and at the same time, because the coil has resistance, it is inevitable that a part of the electrical energy will be converted into internal energy.

Electricity is applied to create a rotating magnetic field that rotates the rotor.

There is a single-phase motor in the fan, which separates the single-phase alternating current of Wuru into another phase with a phase difference of 90 degrees through the action of capacitance phase shifting. The two phases of alternating current are respectively sent into two or four groups of motor coil windings, and a rotating magnetic field is formed in the motor, and the rotating magnetic field generates an induced current in the rotor of the motor, and the magnetic field generated by the induced current is opposite to the direction of the rotating magnetic field, and is pushed and pulled into a rotating state by the rotating magnetic field.

The motor rotates the blades, driving the air to be pumped into the flow and generate wind power.

An electrical appliance used to dissipate heat. The structure of the fan: the rotor:

It is composed of magnets, fan blades and shafts; Stator: composed of silicon steel sheet, coil and bearing; Control circuit: The N S pole of the IC induction magnet is controlled by the circuit to turn on its coil and generate internal excitation to rotate the rotor.

Type: Axial Fan, DC Fan Selection: Overall Cooling Requirement Q = CP M A T = D CP CFM T Parallel Fan and Series Fan:

Parallel fan: The air pressure of the two fans connected in parallel does not change, but the air volume increases. If the heat dissipation power is too small in the design, you can consider adding a fan to solve the problem.

Series fan: The result of series fans is that the air pressure increases, but the air volume does not change. The second method is not able to solve the problem of heat dissipation, and it is generally used to ensure the air volume when the resistance near the wind is too large.

Noise level In order to achieve low noise, the following points must be taken into account: System impedance: The resistance of air flow will cause the flow noise of the air to be generated.

Turbulence of airflow: Due to the poor design of the flow channel, there will be high-frequency noise in the turbulence of the air, and it is difficult to improve the quality if the flow channel is not improved. Fan speed and size:

The faster the speed of the fan, the better the heat dissipation effect, and the larger the size of the fan, the larger the air volume, the better the heat dissipation effect. The higher the speed of the fan, the louder the noise, and the larger the size, the louder the noise. Rise in temperature:

When the temperature rises and the temperature difference decreases, the heat dissipation effect decreases. Vibration: Vibration can cause the fan to increase noise, reduce life, and reduce speed.

Voltage fluctuations: Voltage fluctuations can cause fan speed changes, making operation unstable and generating additional noise. Design Considerations:

Other design requirements must also be taken into account to ensure heat dissipation. Fan: 1. The distance of the fan into the air:

The distance of 3 5mm is a must 3mm - the efficiency of the fan is 80 4mm - the efficiency of the fan is 90 5mm - the efficiency of the fan is 100 2, different air inlets and outlets will cause a great change in airflow resistance, of course, the larger the opening of the inlet and outlet, the better. 3. Do not place blocking objects (such as chips and interfaces, etc.) near the air inlet of the fan, otherwise it will reduce the air flow of the fan. 4. It is better to use rubber to fix the fan, instead of metal screws, so as to avoid vibration.

5. The space design of the fan. For the efficiency and noise of the fan, it is necessary to ensure that the distance between the fan blades and the fan housing is 5 1omm. The blades of the fan must be close to the tongue for better efficiency.