Abstract: A hair dryer comprises a main channel seat; an assembly seat being installed at a center axis of the main chamber; an outer side of the inner stator being enclosed by a rotatable outer rotor of a brushless motor; an outer wall of the outer rotor being integrally formed with a plurality of blades; an inner wall of the outer rotor being installed with magnets which is interactable with coils of the inner stator; a plurality of flow guides being integrally formed between an outer wall of the assembly seat and an inner wall of the main channel seat. Furthermore, an interior of the assembly seat is formed with a circuit installing chamber and a stator installing chamber behind the circuit installing chamber. A wind inlet is arranged behind and is buckled to the main chamber. A heat-isolation heating chamber is installed at a rear side of the main chamber.

Abstract: A pressure adjustable knife set for an electromotive hair cutter comprises: a fixed knife, a movable knife, and a pressure adjust unit; a front edge of the fixed knife having a cutting edge; the fixed knife being formed with a penetrating hole for passing through the adjustable screw of the pressure adjusting unit; a front edge of the movable knife being formed with a cutting edge; a lower side of the movable knife being formed with a supporting leg; the supporting leg being formed with a plurality of heat dissipating holes with a further function of reduction of the friction area of the supporting legs; the movable knife being formed with a penetrating trench; and a fixing plate being installed between the fixed knife and the pressure adjusting unit; an adjustable screw passing through a penetrating hole of the fixed knife, the movable knife and the pressure adjusting unit.