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Electric Fan

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What is Electric Fan?

A fan is a machine used to create flow within a fluid, typically a gas such as air. The fan consists of a rotating arrangement of vanes or blades which act on the fluid. The rotating assembly of blades and hub is known as an impeller, a rotor, or a runner. Usually, it is contained within some form of housing or case. This may direct the airflow or increase safety by preventing objects from contacting the fan blades. Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors and internal combustion engines.

Typical applications include climate control and personal thermal comfort, vehicle engine cooling systems, machinery cooling systems, ventilation, fume extraction, winnowing, removing dust, drying and to provide draft for a fire.

 

History of Electric Fan:-

The punkah fan was used in India about 500 BCE. It was a handheld fan made from bamboo strips or other plant fibre that could be rotated or fanned to move air.

With the advent of practical steam power, fans could finally be used for ventilation. In 1837 William Fourness of England installed a steam-driven fan at Leeds. In 1849 a 6 m radius steam driven fan, designed by William Brunton, was made operational in the Gelly Gaer Colliery of South Wales. The model was exhibited at the Great Exhibition of 1851. Also in 1851 David Boswell Reid, a Scottish physician, installed four steam powered fans in the ceiling of St George's Hospital in Liverpool, so that the pressure produced by the fans would force the incoming air upward and through vents in the ceiling. Improvements in the technology were made by James Nasmyth, Frenchman Theophile Guibal and J. R. Waddle.

Between the years 1882 and 1886, New Orleans, LA resident Schuyler Skaats Wheeler invented a fan powered by electricity. It was commercially marketed by the American firm Crocker & Curtis Electric Motor Company. In 1882, Philip Diehl introduced the electric ceiling fan. During this intense period of innovation, fans powered by alcohol, oil, or kerosene were common around the turn of the 20th century. In 1909, KDK pioneered the invention of mass-produced electric fans for home use. In the 1920s, industrial advances allowed steel fans to be mass-produced in different shapes, bringing fan prices down and allowing more homeowners to afford them. In the 1930s, the first art deco fan (the "swan fan") was designed. By the 1950s, fans were manufactured in colours that were bright and eye catching.

 

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How work Electric Fan?

All fans work by moving the air that is in the area of the fan. This movement of air creates a breeze, which is felt on the skin of the person that is in front of the fan. While this breeze itself does not actually feel cool, there is a cooling effect from the fan's air. The air allows your skin to evaporate sweat faster, cooling your skin.

Electric fans are comprised of a motor run by electric current, which is attached to fan blades via a shaft. This rotor shaft is run by the motor, and turns the fan blades at different speeds depending on the speed set for the motor. The number of blades and the general revolutions per minute of the motor can vary greatly depending on the model of the electric fan.

 

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Use of Electric Fan:-

1. Cool Down your Room (and yourself).

2. Sleep easier.

3. Keep humidity in check.

4. Keep bathroom moisture levels in check with an exhaust fan.

5. Accentuate your room.

6. For the large room, there are often many people.

 

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