How to make an electric fan

First of all, the invention of the electric fan

Who invented the electric fan? It is difficult to find relevant information now.

It is said that 1882, Huey, chief technician of Croca Zhikazis engine factory in new york, USA? Skats？ Hoyla was the first person to invent the commercial electric fan. The next year, the factory began mass production. At that time, the electric fan was a desktop fan with only two blades.

1908, American ek engine electric company successfully developed the world's earliest gear-driven electric fan with left and right shaking heads. This kind of electric fan eliminates unnecessary 360-degree air supply and becomes the mainstream of future sales.

Second, the structure and working principle of the electric fan

The main components of the electric fan are: AC motor.

Its working principle is that the electrified coil is forced to rotate in the magnetic field. The conversion form of energy is: electric energy is mainly converted into mechanical energy, and at the same time, due to the resistance of the coil, some electric energy will inevitably be converted into internal energy.

3. Can the electric fan reduce the indoor temperature after working?

The indoor temperature has not decreased, but will increase. The reason why the temperature rises is that when the electric fan is working, because there is current passing through the coil of the electric fan and the wires are resistive, it will inevitably generate heat and release heat, so the temperature will rise. But why do people feel cold? Because there is a lot of sweat on the surface of human body, indoor air will flow when the electric fan works, so it can promote the rapid evaporation of sweat, and "evaporation needs to absorb a lot of heat", people will feel cool.

Fourth, the types of electric fans

1. Household electric fans: ceiling fans, desk fans and floor fans; There are table fans that shake their heads, and there are also box fans; Some floor fans shake their heads and turn pages. There is also a small wind electric fan, which is specially hung in the mosquito net. When you sleep at night in summer, the breeze blows gently as soon as you turn it on, so that you can sleep well and not get sick.

2. Industrial exhaust fan: mainly used for forced air convection.

After the electric fan is used for a long time, it is easy to get a lot of dust under the fan blades. This is because when the electric fan is working, the blades are charged with static electricity due to friction with air, and charged objects can attract light and small objects, thus absorbing the fine dust floating indoors.

Five, novel and unique electric fan

Voice-controlled electric fan: This kind of voice-controlled electric fan developed by General Electric Company of the United States is equipped with a micro electronic receiver. It only needs to clap your hands twice at a place no more than 3 meters, and the electric fan will run automatically; If you clap your hands three times in a row, the electric fan will stop running automatically.

Air-cooled fan: A new type of electric fan that combines a fan with a refrigerator has been launched in the European market. The fan has a refrigeration core, and the central cylinder of the refrigeration core is filled with mixed liquid. The movement can be taken out and used after being put in the refrigerator for 3 hours, which can blow out cold air and give people the feeling of cold air blowing.

Noisy electric fan: This kind of electric fan developed by Mitsubishi Corporation of Japan has almost no noise. It is equipped with special bird wing blades, which can generate rotating airflow. It uses a DC motor without a protective cover, which is very suitable for places with microcomputers, word processors and photocopiers.

Lamp cap electric fan: This electric fan invented in America can be installed on the lamp cap of a light bulb. Small and exquisite, it can be used as long as there is a lamp holder for installing a light bulb. It is not only convenient to install, but also energy-saving.

Four seasons electric fan: This kind of electric fan made in Germany can be used in all seasons. It is equipped with far-infrared heater and negative ion generator, which can send cool air in summer, hot air in winter and negative ion air all year round. It has the functions of refrigeration and heating, air purification, disease prevention and health care.

Matchbox electric fan: This miniature fan developed in France is only the size of a matchbox, with a thickness of 14mm, a length of 62 mm and a weight of only 45g. It uses 65,438+02 to 24 volts DC and two watts of power, and its continuous service life can reach 65,438+00,000 hours.

Fuzzy micro-control electric fan: This advanced electric fan introduced by Toshiba Company of Japan has seven levels of air volume, such as strong, medium and weak, and can automatically select the best air supply according to the temperature and humidity measured by the sensor. If someone touches the net cover, it will automatically stop rotating.

Finger-injury-proof electric fan: Robertson Industries introduced two new types of fans. As long as a person's finger touches the cover of the electric fan, it will send an electric pulse signal to its control system to stop the fan from rotating, so as to avoid finger injury.