How does the air fryer work?
Basically you have a kind of oven that is invaded by profusion of hot air (like a mega super hairdryer), a sort of mini fan oven.

There are various versions of air fryers available at likri.com . Basically there are 2 schools of thought : Put food in a basket that also has an arm inside that acts as a mixer and slowly turns the food so as not to attack them (perfect for French fries) or large baskets, without mixer, where every now and then if you make the fries you have to pull out the basket and shake it.