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HOW A HAIR DRYER WORKS. 5

HOW A HAIR DRYER WORKS

Introduction

Hair dryers have become part of the daily routine for many people. Most people just turn on and turn off the dryer without knowing how it works. The following is a chronological order of how a hair dryer works. The photo attached therein is for visual and clarity purpose.

The hair dryer has two important components that guarantee its functionality. A motor-driven fan and the heating element. When the dryer is plugged into the socket, electric current flows to the motor and this triggers the fan to start spinning. When the fan spins, it sucks in air from the atmosphere into the dryer through the ventilations on the side. There is some sort of “sieve” on the side to prevent unwanted objects from being sucked in. (Garg, 2007)

The heating element is composed of wire that is rust resistant and is a poor conductor of electricity. Therefore, instead of transmitting the electric current it converts that into heat. When the fan sucks in the air, it is blown over the wires of the heating element and it heats up. Once the air is heated up it is blown out onto the hair. (Lawson, 2008)

The switches on the dryer control the amount of charge that travels to the wire and consequently the amount of heat that will be radiate. Other dryers also have a switch that controls the air that is sucked in to the dryer which consequently affects the amount of hot air being blown out.

REFERENCES

Garg, C. (2007). Children knowleege bank. Delhi: Pustak Mahal.

Lawson, J. (2008). Hands-on science and technology: Grade 2. Winnipeg: Portage & Main Press.