What Is a Mechanical Fan?

The electric fan is referred to as an electric fan, which is also called a fan or a fan fan. It is a household appliance that uses an electric motor to drive the fan blades to rotate to achieve accelerated air circulation. Widely used in homes, classrooms, offices, shops, hospitals and hotels.

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The mechanical fan originated in 1830. An American named James Byron was inspired by the structure of the clock and invented a mechanical fan that can be fixed on the ceiling and driven by a clockwork. The cool breeze brought by the fan's rotating blades makes people feel cool, but it is troublesome to climb up the ladder to wind up.

In 1872, a Frenchman named Joseph developed a mechanical fan that was started by a wind turbine and driven by a gear and chain device. This fan was much more refined than the mechanical fan invented by Byron and was more convenient to use.

In 1880, the American Shule first mounted the blade directly on the electric motor, and then connected to the power supply. The blade turned rapidly, and a wave of cool wind rushed out. This was the first electric fan in the world.

Rotor: It consists of magnet, fan blade and shaft;

Stator: It consists of silicon steel sheet, shaft and bearing;

Control circuit: IC induction magnet; NS pole controls the coil conduction through the circuit to generate internal excitation to rotate the rotor.

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

2. According to the classification of use, it can be divided into: household electric fans and industrial exhaust fans.

Household electric fans: ceiling fans, table fans, floor fans, wall fans, ceiling fans, ventilation fans, page fans, air-conditioning fans (ie cooling fans), etc. There are also moving and non-shaking fans in the table fans, and there are also Page-turning fans; floor-standing fans are shaking their heads and turning pages. There is also a small breeze fan, which is specially hung in a mosquito net and sleeps on summer nights. When it is turned on, it immediately learns a breeze and can sleep peacefully without getting sick.

Industrial exhaust fan: mainly used for forced air convection and ventilation.

1. Look at the random files The random files of each electric fan include the instruction manual, product certification, electrical wiring diagram and packing list. When purchasing, you should check and check the quantity and quality of parts according to the packing list.

2. Check whether the net cover and the fan blade have obvious deformation: On the assembled electric fan net cover, use a pen to point to the highest point of the fan blade, and slowly move the fan blade. The distance between the corresponding points of the other fan blades and the pen tip Should be very close, then rotate the fan blades, pay attention to observe whether the rotation is light and flexible, and you can stop at any position.

3. See if the control mechanism is flexible: The control mechanism includes speed switch, timing knob, moving head switch, light switch, etc. These control mechanisms should be flexible in operation and reliable in contact. Regarding the speed adjustment gear, it is not allowed to have two gears turned on at the same time or one gear cannot be pressed down. Press the stop button, and the speed gear buttons should be reset normally.

4. Look at the performance of the moving part: The fan head's tilting and tilting angles are flexible and locked tightly, adjusted to the maximum depression angle or shaking the head to the final position, and the net cover must not touch the fan pillar. When the fan is running, the stability should be good, and it should not fall down, and the angle of shaking the head should not be lower than 60-80 degrees.

5. Look at the starting performance: the starting performance is an important quality index of electric fans. During the inspection, it should be adjusted in the breeze gear, and when the rated voltage of the power supply is 85%, that is, when the voltage regulator is used to reduce the 220 volt voltage to 187 volts, the electric fan should be started. The shorter the time required for the fan to start from normal operation, the better the starting performance of the fan motor.

6. Look at the operation and speed regulation performance: After the power is turned on, the moving head switch is reciprocated several times to check whether it is malfunctioning or the assembly is too tight. In this process, the mechanical transmission part of the fan should not have abnormal noise. When the electric fan is running in micro, medium and strong wind, the motor and fan blades should be stable, with small vibration and low noise. Fans should shake their heads and shut down quickly, without intermittent, stagnation and jitter. The speed difference between each gear should be obvious. The larger the air supply angle, the better. When the fan is stopped, the axial clearance of the rotating shaft does not exceed 0.5 cm, and the clearance is too large, which will cause axial movement and impact sound during operation.

7. See if there is leakage: After the electric fan is powered on, if there is a strong numbness in the hand, test it with a test pen, and the test pen will also display light.

1. The fan shaft is to ensure that there is lubricating oil, otherwise the motive force of the blades on it cannot be dragged. If you are at home, you can choose to turn off the power and then flip the blades. If you spin stiffly, there is basically no lubricant.

2. Wear caused by prolonged use. If a fan is used for a long time, the motor will be worn out, and the motor's shaft sleeve will easily burn out when it is worn.

3. The fan caused by overheating does not turn. There is a motor in the fan device. There will be a thermal circuit breaker in the motor. If a short circuit occurs in the coil winding, the heat generation will increase for a short time. In this case, the motor will "strike".

4. The starting capacitor capacity becomes smaller. When the fan is used for a long time, the capacitor capacity will be reduced, resulting in a smaller motor starting torque and unable to drive the load.

5. In many cases, the causes of the fan blades not turning are poor maintenance. If the blade is turned stiff after turning off the power, you should use some lubricating oil to drip into the shaft to allow it to be lubricated, so as not to affect the motive force to drag the blade.

6. Regarding that the blades do not rotate due to wear, the easiest thing is to replace the parts, especially the bushings, which are easy to burn out if worn.

7. If the capacitor capacity becomes small and the fan does not turn, you can remove the capacitor and replace it with a new capacitor of the same model. It is recommended to choose a capacitor that is 20% larger than the original capacitor, which will have a better turning effect.

8. The axial clearance of the rotating shaft is too large. You can choose to adjust the gasket after removing the motor. However, remember to pay attention when the motor is installed back, the rotor must be concentric with the bearing, the lubrication screw is tightened slowly at the diagonal, and finally the shaft is knocked with a wooden handle to ensure that it is concentric.

9, if it is due to electrical failure, you can check the wiring of each line, sometimes the wire is damaged, etc., you can repair the problem.

First of all, when choosing a product, choose a product of excellent quality. Due to the low technical threshold of the fan industry and the uneven products in the market, we must choose products from well-known brands to ensure quality.

Secondly, because electric fans can directly convert electrical energy into kinetic energy, the power consumption is very low, the highest power is only 60W, which is equivalent to the power consumed by ordinary lighting desk lamps. Therefore, from the perspective of energy conservation, the use of electric fans in the summer season is undoubtedly Is the best choice. The use of electric fans with air conditioners, the air conditioner temperature is set at 26 ~ 28 , will save power and money.

Third, as far as the use of the fan is concerned, in general, a fan with a large fan blade has a large electric power and consumes a lot of electric energy. The power consumption of the electric fan is proportional to the speed of the fan blade. For example, a 400mm electric fan consumes 60W when using strong wind, and only 40W when using a slow gear. The power consumption of the fastest gear and the slowest gear of the same electric fan is 40% different. Therefore, first turn on the strong wind and cool down. After using the breeze more, you can reduce the power consumption of the electric fan. When the air volume meets the requirements of use, try to use a breeze or a stroke.

Fourth, when in use, the fan is best placed next to doors and windows to facilitate air circulation, improve the cooling effect, shorten the use time, and reduce power consumption.

Finally, pay attention to the maintenance of the fan to maintain its good performance and avoid the deformation and vibration of the blades. In this way, it is also conducive to the energy saving.

1. The power formula is: P = UI is the power of the motor, U is the voltage, and I is the current.

2. Before calculation, use a multimeter to measure the current and voltage used, and then use the formula to calculate.

Today's electric fans have changed the traditional image in people's impression, and they are more individualized in appearance and function. The functions of computer control, natural wind, sleeping wind, and negative ions, which belong to air conditioners, have also been adopted by many electric fan manufacturers, and more practical functions such as lighting and mosquito repellent have been added. These eclectic and versatile products bode well for the development trend of the entire electric fan industry.

In the era of pursuing individual fashion and refinement, consumers seem to have a crush on petite and lovely home appliances. So cute, bright colors, small size of the page fan, a variety of portable electric fans came into being. The shells and leaflets of these electric fans are made of plastic. They are extremely lightweight as a whole, coupled with their small size and beautiful colors and appearance, they are very popular once they are launched.

Various new functions have been added to the electric fan, which not only highlights the personality, but also raises the grade invisibly. Such as the development of an earlier and more practical remote control function, the operation is freed from a certain space limitation, coupled with the dynamic display of the LCD screen, the operation is clear at a glance. As consumers pay more and more attention to health, manufacturers have started to talk about improving air quality, so they have added functions such as negative ions, oxygen bars, and ultraviolet sterilization.

In addition, the mosquito-repellent fan can volatilize the mosquito-repellent material through electric heating, and quickly send the mosquito-repellent material to various places in the room by means of wind. With the rotation of the fan blades, the fragrant flowers also float out, and the fragrance tablets can be replaced at will. Ceiling fans with lighting functions integrate lighting and fan functions. They all attract consumers by virtue of a unique function. The gaze of the person.

International energy shortages and domestic electricity shortages occur frequently. Energy-saving features will be a development direction that cannot be ignored. The air conditioning fan positioned between the air conditioner and the fan uses water as the medium, works by the principle of phase change heat absorption of materials and the principle of water evaporation potential, and can send cold air below room temperature, while the built-in conventional electric heat source can send warm and humid wind. In addition, energy-saving and environmental protection fans with battery fans or solar energy will also be promoted and applied in the future.

In the hot summer, turning on the electric fan and blowing the breeze on the surface is not a good thing. Many people get sick because of using the electric fan improperly. The reason is that many people lack the common knowledge of using the electric fan.
Electric fans are the main heatstroke cooling device in summer for many people. However, some people use electric fans improperly, causing health hazards, such as colds, facial paralysis, periarthritis, and back pain.
Five misunderstandings about blowing electric fans:
1. Long-term blowing Many people like to blow electric fans for a long time. If they feel that the body stops just after cooling down, they will feel hot, so it is better to blow for a long time. However, if you blow at the electric fan for a long time, the temperature of the human body will drop with the evaporation of a large amount of sweat, which will easily cause diseases such as colds, colds, abdominal pain, and diarrhea. Generally, it is appropriate to blow air for half an hour to one hour.
2. Fast blowing Some people turn the electric fan to the fastest speed in order to cool down as soon as possible. This is inappropriate. When the air temperature exceeds 30 ° C, the air temperature is close to the normal body temperature of the person. The wind from the electric fan is also high temperature wind. At this time, the body's heat should be mainly dissipated by sweat evaporation. The temperature drops, the pores are closed, the sweat inside the body cannot be emitted, and you will feel hot. At the same time, you will also feel tired and weak, and back pain, which is called "sweating." Therefore, it is not appropriate to use high-speed and high-speed air blowers for electric fans. It should be adjusted to medium or low speed, and gentle breeze is better.
3. It should not be placed near the body if the wind blower is near the wind. If strong wind is blown near, and only one side of the body is blown, the sweat on the wind surface evaporates quickly, the temperature is significantly reduced, and the side that cannot blow the wind Sweat evaporates slowly, causing a large gap between the blood circulation and sweat excretion on both sides of the body, and the nerve center will lose balance. Once the time is too long, all organs will be exhausted, and the whole body will feel unwell. Therefore, when blowing an electric fan, it is best to keep it at a distance of 2 meters from people, so that the blowing wind is even and soft.
4. Electric fans that blow directional wind are mostly shaking head fans. When blowing, the fans constantly move the position and direction. The blows form a large and a small one, which makes the body surface be slower than the wind. . Therefore, it is best to use a shaking head fan, and do not blow directional wind.
5, falling asleep is to use an electric fan to cool down and sleep. When a person falls asleep, the functions of all the organs of the body are reduced to a minimum level, all reflections disappear, the immunity is reduced, and it is easy to cause disease.