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Hair Dryer

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What is Hair Dryer?

A hair dryer, also known as a blow dryer, is an electrical device used to dry and style hair. It uses an electric fan to blow air across a heating coil; as the air passes through the dryer it heats up. When the warm air reaches wet hair it helps evaporate the water.

Discover Conair's great selection of hair dryers from traditional bonnets to high-tech blow dryers and styles for salons, home use and travel.

A hair dryer, hairdryer or blow dryer is an electromechanical device designed to blow normal or hot air over damp hair to accelerate the evaporation of water particles and dry the hair. Blow dryers allow better control over the shape and style of hair, by accelerating and controlling the formation of temporary hydrogen bonds inside each strand. These hydrogen bonds are powerful but are temporary and extremely vulnerable to humidity. They disappear with a single washing of the hair.

 

History of Hair Dryer:-

In 1890 the first hairdryer was invented by French stylist Alexander Godefroy. His invention was a large, seated version that consisted of a bonnet that attached to the chimney pipe of a gas stove. Godefroy invented it for use in his hair salon in France, and it was not portable or handheld. It could only be used by having the person sit underneath it.

Armenian American inventor Gabriel Kazanjian was the first to patent a blow dryer in the United States, in 1911.

Around 1915, hair dryers began to go on the market in handheld form. This was due to innovations by National Stamping and Electric works under the white cross brand, and later U.S. Racine Universal Motor Company and the Hamilton Beach Co., which allowed the dryer to be small enough to be held by hand. Even in the 1920s, the new dryers were often heavy, weighing in at approximately 2 pounds (0.91 kg), and were difficult to use. They also had many instances of overheating and electrocution. Hair dryers were only capable of using 100 watts, which increased the amount of time needed to dry hair.

Since the 1920s, development of the hair dryer has mainly focused on improving the wattage and superficial exterior and material changes. This really caught on in the 1960s with the introduction of better electrical motors and the improvement of plastics. Another important change happened in 1954 when GEC changed the design of the dryer to move the motor inside the casing.

The bonnet dryer was introduced to consumers in 1951. This type worked by having the dryer, usually in a small portable box, connected to a tube that went into a bonnet with holes in it that could be placed on top of a person's head. This worked by giving an even amount of heat to the whole head at once.

The 1950s also saw the introduction of the rigid-hood hair dryer which is the type most frequently seen in salons. It had a hard plastic helmet that wraps around the person's head. This dryer works similarly to the bonnet dryer of the 1950s but at a much higher wattage.

In the 1970s, the U.S. Consumer Product Safety Commission set up guidelines that hair dryers had to meet to be considered safe to manufacture. Since 1991 the CPSC has mandated that all dryers must use a ground fault circuit interrupter so that it cannot electrocute a person if it gets wet. By 2000, deaths by blow-dryers had dropped to fewer than four people a year, a stark difference to the hundreds of cases of electrocution accidents during the mid-20th century.

 

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How work a Hair Dryer?

Electric hair dryers work by blowing room temperature air in through the vents. The air then passes over wire coils that heat it, making it able to blow the hair dry with hot air. The process of air blowing on the hair speeds up water evaporation. Applying power to the hair dryer allows the motor to start spinning the fan inside, and that is what draws the air in through small air holes on the side of the dryer. A safety screen is installed to make sure other objects cannot get into the hair dryer. Something that is very important in recent models of dryers is the ground fault interrupter circuit plug, which makes sure the electric hair dryer is grounded properly. Inside it is a circuit board along with a surface mount capacitor that stores and releases the charge, and a resistor, which resists flow of an electrical current. Thousands of people were electrocuted throughout the last century due to the lack of grounded of hair dryers and other electrical appliances.

 

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Effects of Hair Dryer on human:-

1. Have complained of a headache.

2. Early loss of hair.

3. Hair to be dry and white.

4. Due to the high temperatures of hair breakage.

5. Dry skin of head.

6. Dandruff on head.

 

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