Hand point the fan to how to do the cost to look like.

If you turn on the fan by hand, then it will be the original appearance of the cost, you can just turn it on for him, and at the same time be sure to remove his glue.

Hand point the fan and step on. How is it going to be restored to the way it was? On the basis of his creases, fold it again, press it again, and it can return to its original appearance.

If there is a slight scratch, clean the wound and bandage it properly. If it is a more serious scratch, it is recommended to go to a regular doctor as soon as possible. Be sure to buy and use regular fan products that meet safety specifications, and try not to buy some low-end ones.

At 15 o'clock, the fan is turned on to make the cost, and you can use the binding machine to reduce the cost.

If you want to make the original sound? You have to assemble it as it was in the manual.

The flashlight fan, if you turn it on, it can't be restored to its original state, it must follow its original folded traces, and after a few trials, it should be able to achieve success.

Flashlight fan. Step on it and make it. His fan fans are generally electric, and now the fans are not unsealed, and the air conditioners are more comfortable.

If you want to make it look like you want it to be, it is necessary to have the characteristics and characteristics of this look.

The cost of flashlight fan color opening is like this, and you need to have this technology to be able to do it.

To be like this, this is to know by looking at him.

The material used in the hand fan is plastic, and its cost is very low.

Take a little fan apart to make it look like the cost comes.

You need to look at the manual to reinstall it, and then debug it, or you can find a professional who repairs the electric fan to help you install the cost.

Many times I don't understand, what do you not decorate?

The convergence fan can be disassembled to make it look like a cost.

How to do the cost of the flashlight seal? This can be done according to the manual, or ask the merchant.

It should be difficult to make a cost-effective appearance.

How to do the cost of stepping on the fan with your hand? I don't understand what your hand fan means, so I can't tell you.

If you turn on the fan to make it look like the cost, then you can only bring the fan to the upper blade to make it smaller.

1. Computer heat dissipation.

Usually when we copy the computer, BAI has a cooling fan to dissipate the CPU of the computer.

Du this is Bao Zhi

A way to protect your computer. Because the computer will produce heat after a long time of DAO use, if the heat cannot be dissipated in time, it will cause the CPU temperature to be too high and cause automatic shutdown or blue screen of death, affecting normal use. In severe cases, it will also burn out the CPU and increase the cost of maintenance parts.

2. Car cooling.

There will also be cooling fans installed in the car. Because the car will convert mechanical energy into heat energy during driving, so that the internal temperature of the car will rise, in order to ensure that the parts inside the car are not burned out, a cooling fan is needed to cool down and dissipate heat, so as to ensure that the parts are within the normal temperature and do not fail.

3. Industrial production.

Generally, industrial cooling fans are used in the production equipment of the factory. Due to the production environment, many equipment works in a workshop with heavy dust and weak ventilation, and long-term use will make the equipment accumulate a lot of debris and dust, which can not effectively dissipate heat. The use of cooling fans can solve these problems well, cool down and remove dust for the equipment, enhance ventilation, and effectively extend the service life of the equipment.

In addition, cooling fans can also be used in communication equipment, purifier industry, UPS power supply, medical equipment and many other industries, with a wide range of applications and a huge market scale. The content introduced above is the application field of DC cooling fan, in fact, the application field of DC cooling fan is very extensive, and the above is just the part of our life that we are more commonly contacted!

The AC power supply can be used as a desktop fan, and the DC power supply can be used for small production.

For example, when using a computer, or other electrical appliances with poor heat dissipation functions, you can also use them.

Hello. There is a kind of fan that is four-wire with a temperature sensor, plugged into the CPU interface, and the wind speed will be automatically adjusted. If it is plugged into the sysfan interface, it is no different from a normal fan. Nowadays, general motherboards have a cpufan interface.

Because the electric fan uses alternating current. First of all, let me explain the meaning of alternating current (I have said it several times)...Alternating current refers to the AC frequency of power supply, which means that the COS curve of the supply voltage changes by 50 cycles in 1 second.

That is, there are 50 positive charges on 1 wire in 1 second. 50 times of negative electricity. But the voltage does not change.

So that you can understand what I'm saying to you. We have 2 electric 220v in our house. Here it is divided into A and B.

I divide 1 second into 100 parts. When 1% of seconds, A is the positive pole, B is the negative pole, and the voltage is 220V...When 2% of seconds, A is the negative pole, B is the positive pole, and the voltage is 220V

is 1hz...When 3% of seconds, A is the positive pole, B is the negative pole, and the voltage is 220V...When 4% of seconds, A is the negative pole, B is the positive electrode, the voltage is 220V, and it is 2Hz....

And so on in 1 second, there are 50 positive charges on 1 wire. 50 times of negative electricity. But the voltage does not change.

The current that periodically changes direction is called alternating current, and the time when the current changes periodically for one time is called cycle, and the number of times the current changes per second is the frequency, and the unit is Hz (in honor of the contribution of Hertz). Maxwell's discovery of the classical theory of electromagnetism, Hertz added a crucial stroke to Maxwell's theory).So there is no such thing as positive or negative alternating current.

In other words, the electrical characteristics of the two wires are the same. So how do you fix the electric fan motor and rotate in one direction? Because it is determined by the internal starting winding and starting capacitor, generally there are 3 kinds of starting (as far as I know) 1 capacitor starting motor has 2 coils inside the starting winding and running winding, and the line of the starting winding can be reversed by changing the line of the starting winding.

For example, the pinout of the starting winding is the pinout of the running winding, and the pinout of the running winding is the capacitance if the positive adapter wire. Fireline and C and R1 .Neutral line and b and d...

Connect A to R2. That's it. To reverse it, you can reverse A and B.

Generally, it is a low-power motor such as an electric fan. Washer. Small hair dryer.

2. Excitation start. Such as a hair dryer. 3. Centrifugal start, such as a chainsaw.

Therefore, changing the neutral line and live wire will not affect the forward and reverse rotation of the electric fan motor. You can draw the wiring method I just made. Only the changed wiring can be reversed.

I won't explain the positive and negative reversals of the other two. By the way, if you don't connect the starting coil, you can also start it. But with the help of external forces.

Turn it by hand after powering. You rotate forward with your hand, and the motor starts forward. You reverse it by hand, and the motor starts in reverse.

The motor can operate normally after starting.

Because this is alternating current, only direct current will change direction!

The motor of the electric fan is an alternating current motor, and the direct current motor will run in the opposite direction when the electrodes are opposite, like a four-wheel drive car.

You're talking about direct current, where an electric current flows from the positive to the negative. The household is alternating current, and the direction of the current is constantly changing, which is not positive or negative.

There is no positive or negative alternating current for a plug fan, and the direction of the current is sinusoidal alternating. If it is a DC motor, there will be a difference between the positive and negative directions.

Because the two wires in the socket have been fixed, one live wire and one wire, it is useless to change the direction of the plug!

In addition, the motor used in the fan is alternating current, and the electromagnetic field it generates can only make the motor turn in one direction!

It is mainly the knowledge of electrical energy, kinetic energy, wind energy, heat energy conversion, electromagnetism, frictional energy consumption and other aspects of physics. Let's connect it, let's be born!

The knowledge involved in electric fans includes: electricity, wind mechanics, etc

Electric fans are a necessity in daily life, and everyone knows that its structure is very simple, mainly motors and motors and some hardware. The electric fans on the market are not expensive, but there are often failures, sometimes the maintenance cost is more expensive when there is a problem, and even catch up to buy a new one, but it is a pity to throw it away, in fact, the main fault of the fan often appears on the motor, as long as you have a certain motor maintenance knowledge, you can do it yourself. Let's learn together.

Prepare the tools

All you need is some common disassembly utensils, such as a screwdriver. There is also a common multimeter.

The motor is tightened, and the shaft does not rotate

If the maintenance motor is tight, first measure the resistance value of the motor, and the normal resistance value is worth repairing. If the resistance value is normal, you can disassemble the motor to clean the shaft of the motor, often there are foreign objects on the shaft to cause the oil to burn dry and stuck, in this case, clean with anti-rust oil, and then add oil lubrication to make the shaft flexible installation.

Resistance measurement of the motor

Most of the starting capacitors of the current motor are mounted on the motor moving head gearbox, and the motor leads have a total of 4 wires, which are distributed as follows:

Black, red, blue, and white lines, usually black is a common line, red, blue, and white is a gear line, and the resistance of the black line and the red, blue, and white lines are: 500 600 700 ohms, and the resistance of different motors is not much different, and the 220V power supply is connected to the black line and the gear line.

If the resistance value is not normal, disassemble the motor, and short the motor coil with a thermal fuse, usually the motor at the first point has a thermal fuse, and the motor of the pure copper wire can be repaired. The cheap fans on the market use inferior aluminum wire motors, as long as the motor is tight, it is basically impossible to repair, only worse brand new motors. (At present, this kind of fan is cheap, and it generally breaks down after about a year of use).

The motor is loose and the shaft rotates normally

In this case, if you can turn it, you can determine that the starting capacitor is broken (generally the starting capacitor capacity of the fan is 1 The starting capacitor motor coil also has a resistance value, usually around a few hundred ohms, if the resistance value is too large, the motor is damaged.

The motor rotates abnormally and shakes the head abnormally

In this case, the motor shaft is worn, lubricating oil needs to be added, and the head head gear box should be replaced if the head cannot be shaken. (Some fans use small shaking head motors, and the moving head motors are not broken).

Now you should know that in fact, motor failure is not difficult to eliminate, and the accessories of small electrical appliances such as electric fans are also very cheap, and they can be bought in the general electronic accessories market. Many times, the electric fan suddenly fails when in use, which brings a lot of inconvenience to life, but as long as you are proficient in these experiences, you can easily solve it, but after all, it is an electrical product, and some products with complex structures are recommended not to do it yourself, contact professional maintenance personnel to solve it.

Graphics card fans, motherboard fans, power supply fans, and hard drive sounds are all sources of noise.

Hard disks, CPU fans, power supply fans, graphics fans.

The fan that comes with the computer generally has a CPU fan, some graphics cards also have fans, and then there is a fan on the power supply of the case, and there is no fan for other parts in general, if you install a fan, you can install some fans on the case, and sometimes there are more fans that may not be able to have a good effect on heat dissipation!

The motherboard may have one! There must be one for the CPU! The graphics card may have one! The chassis may also have 1 to 2! There must be one power supply, which means at least two.

The CPU and power supply are a must, and you can add them to the memory and graphics card.

At least two CPUs, one power supply, and some graphics cards also come with them, and you can add them yourself.

If you want to build the computer yourself, the CPU you buy will have a fan in the box, but not in bulk, and the power supply will have a fan.

There are at least two: on the CPU and on the power supply.

There may be three more: on the motherboard's south (or north) bridge and graphics card, there may be a few more on the memory of hardcore gamers, and there may be a few more in the chassis of senior DIY.

Two, case fan and cpu fan, cpu fan can buy new replacement by yourself.

The normal one that comes with it should be three CPUs, one graphics card, one power supply

You can also add an additional fan to the case

There are two basic ones.

One is the power fan.

One is the CPU fan.

This one can be changed by yourself.

There are graphics cards, there may also be fans, and there are also heatsinks that are useful.