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Hair Dryer

Description ...

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. Hair dryers may be used with a variety of brushes and combs to achieve different hair styles. One of the key factors to consider when designing a portable hairdryer is the amount of heating power it can produce. Since warm air is capable of absorbing more moisture than cold air, the temperature of the airflow is critical. By calculating the specific heat of the air and understanding the maximum temperature that can be used without burning the skin, engineers can calculate the amount of power required for the heating element. This ensures that the device will generate enough heat to dry the hair quickly. However, it is not enough to simply raise the temperature of the hair; the air must also pass rapidly through the hair for efficient moisture removal. Therefore, the efficiency of the fan is also a critical consideration. Another key design criteria is the safety of the device. First, the hair dryer must not become so hot that it burns the user during operation. The plastic housing must remain at a comfortable temperature and cannot overheat or else it could melt or catch fire. To solve this problem, engineers have developed temperature cutoff switches that prevent the heating coil from getting too hot. This cut off switch also turns off the heating coil if the blower motor on the fan stops functioning. Second, the hair dryer must not cause electric shock. A special shock safeguard, a Ground Fault Circuit Interrupter (GFCI), is used in modern hair dryers to prevent accidental electrocution. Other factors to consider include the weight of the unit and a user-friendly design. For the sake of convenience, hair dryers are designed to weigh only about 1 lb (500 grams), and they are made to be easy to handle during operation.

Properties ...
    name properties
    numvalue floatvalue textvalue ntextvalue multi enabled
    Hairdryer name 0 0 1 0 0 1
    brand 0 0 1 0 0 1
    model 0 0 1 0 0 1
    weight 1 0 0 0 0 1
    color 0 0 2 0 0 1
    Technology 0 0 1 0 0 1
    plug type 0 0 1 0 0 1
    motor type 0 0 1 0 0 1
    Voltage 1 0 0 0 0 1
    Wattage 1 0 0 0 0 1
    Warranty 0 0 1 0 0 1
    features 0 0 2 0 0 1
    number of combs 1 0 0 0 0 1
    speed settings 0 0 2 0 0 1
    temperature settings 1 0 0 0 0 1
    Cord Length 1 0 0 0 0 1
    barcode 0 0 1 0 0 1
    dimensions 0 0 1 0 0 1
    made in 0 0 2 0 0 1
    under license of 0 0 1 0 0 1
    Considerations 0 0 1 0 1 1
    Description 0 0 0 1 1 1
    Image 0 0 1 0 0 1
    subject 0 1
    Description 0 1
    Thumbnail 1 0 0 1 0 0 1
    Original Photo 0 0 1 0 0 1
Groups ...
  1. 1. Hair Products
  2. 2. Beauty ElectrOnics
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