Final assessment

product exhibition : Hair dryer

Main part ; The motor

Hair Dryer Air Flow

The small motor actually sits inside the fan, which is firmly attached to the tip of the motor. When supplied with power, the motor and the attached fan both spin. The centrifugal movement of the fan blades draws air in through the small round air inlets in the side casing of the hair dryer. These holes are covered by a safety screen that prevents other objects from being sucked in as well. The air is then blown down the barrel of the hair dryer.
The small black fan sits atop the motor. The motor spins the fan. Air is drawn in through the openings on the side of the hair dryer.
This hair dryer have high and low airflow settings.Changing the airflow involves modulating the speed at which the motor is turning. This is accomplished very simply by altering the current flowing through the part of the circuit feeding the motor. When the power supplied is low, the motor and the fan spin slowly. Less air is pushed through the hair dryer. With more power, the motor speeds up. The fan rotates rapidly, drawing in more air and increasing the airflow.