Working principle behind a hair dryer?

Answer 1

A traditional hair dryer evaporates water from your hair using a stream of heated air blown into the hair. The temperature and time of drying must be carefully controlled to avoid damaging the hair shafts. Newer hair dryer technology uses electrical charges (ions) to strip water molecules from your hair, which reportedly is faster and less likely to damage hair (split ends, frizzy, dull). Reportedly it removes moisture from the surface of the hair while leaving some moisture within the hair shaft for improved sheen. Some manufacturers claim that using crystals of the mineral tourmaline in the construction of the dryer produces a superior electrical charge, while using ceramic heater elements produces superior hot air, so the latest high-priced dryers boast "Ceramic Tourmaline Ionic" technology.

Answer 2

A voltage is connected across a heating coil and a current flowing in the heating coil creates heat (just like in an incandescent light bulb). A blower motor helps disperse the heat from heating element to the area to be heated, like the hair. The hot air combined with the blowing help evaporate and blow the dampness from the hair.

Answer 3

An open loop system has no feedback to control what is being "done" by the system or device. In a hair dryer the work being done is to dry something, typically your hair. However, the hair dryer has no way of knowing how "dry" your hair is getting and adjusting the speed or heat to dry faster or slower. It is the person at the controls that makes this judgment and not the device. However in a hair dryer there may be a heat sensor that turns off the heating element so it doesn't get too hot. This is a feedback system within the dryer, but has nothing to do with how dry your hair is getting.

Answer 4

A hair dryer works by using a heating element to produce hot air, which is then directed through the nozzle onto the hair. The hot air helps to evaporate the water in the hair, speeding up the drying process. The speed and temperature settings of the hair dryer can be adjusted to control the drying process.

Answer 5

the main part of the hair dryer is the fan which blows the heat towards your hair. this will make your hair dry.

Answer 6

Dry your hair when it is wet.

They can also function as a cheap alternative to a heat gun.