2- Hair dryer - How does it work?

Adım 1 — General principle

Hair dryers use a fan lead by a motor and a heating element to transform electric energy into convective heat. The whole mechanism is very simple. The video (FR) shared in the introduction shows the general principle. You can find it, along other videos, on Mozaik Education (FR).

Adım 2 — Electronic principle

As previously stated, each model uses a solution that varies depending on the brand. It would be difficult to study each one. We will focus on studying the circuit of a Philips SalonDry Compact. We find the same components in devices with variants, but the overarching principle stays the same.

Adım 3 — Electronic principle (cont.)

As an example, here is the circuit diagram of a different model. We find more or less the same components, rigged differently. They are connected to a switch with 4 positions: P0 = power off; P1 = medium speed and temperature; P2 = high speed and temperature; P3 = low speed and temperature.