Hairdryer with high electrical safety

Abstract

A hairdryer includes a casing, a flow duct provided within the casing and having an intake port and a delivery port, a motor unit including an electric motor, and at least one rotor, which can be driven in rotation by the electric motor and is configured for sucking in an air flow through the intake port and sending it into the flow duct towards the delivery port. At least one electrical resistance is inserted in the flow duct and configured for heating the air flow taken in by the aforesaid rotor. The at least one electrical resistance is coated with electrically insulating material, and the motor unit includes a watertight casing housing the electric motor.

1 . A hairdryer including:
 a casing,   a flow duct provided in said casing and having an inlet port and an outlet port,   a motor unit including an electric motor,   at least one rotor operable in rotation by said electric motor and configured for sucking in an air flow through said inlet port and sending the air into said flow duct towards said outlet port,   at least one electrical resistance inserted into said flow duct and configured for heating the air flow taken in by said rotor,
 said at least one electrical resistance is coated with an electrically insulating material, and 
 said motor unit including a watertight casing housing said electric motor. 
   
     
     
         2 . The hairdryer according to  claim 1 , wherein each electrical resistance of said at least one electrical resistance is made by a wire-like element coated with an electrically insulating material. 
     
     
         3 . The hairdryer according to  claim 1 , wherein said watertight casing includes a first shell and a second shell joined to one another with a seal therebetween. 
     
     
         4 . The hairdryer according to  claim 3 , wherein said second shell includes a radial extension having a channel therein for the routing of electrical cables configured for powering said electric motor and said at least one electrical resistance. 
     
     
         5 . The hairdryer according to  claim 4 , wherein said radial extension is connected to said casing with an interposed seal. 
     
     
         6 . The hairdryer according to  claim 3 , wherein said first shell includes an end hole into which a plug-like seal fits traversed by wire-like members defining said at least one electrical resistance so as to route said wire-like members into said watertight casing. 
     
     
         7 . The hairdryer according to  claim 3 , wherein each of said first and second shells includes a plurality of radial eyelets configured for coupling with a corresponding plurality of support ribs for said at least one electrical resistance, wherein said support ribs are bound to said first and second shells upon the joining thereof in an axial direction. 
     
     
         8 . The hairdryer according to  claim 3 , wherein said second shell is traversed by an output shaft of said electric motor whereon said rotor is fitted, a cap including a watertight bearing that supports said output shaft and is configured for providing a watertight seal between said output shaft and said second shell being furthermore coupled to said second shell. 
     
     
         9 . The hairdryer according to  claim 1 , further including a sleeve arranged into said casing and providing a splitting of the path of said flow duct into a main duct, wherein said at least one electrical resistance is housed, and a secondary duct having an annular cross section comprised between said sleeve and a wall of the casing. 
     
     
         10 . The hairdryer according to  claim 9 , wherein said rotor is configured for sending a first share of the inlet air flow into said main duct so as to impinge upon said at least one electrical resistance, and a second share of the inlet air flow into said secondary duct so as to cool the casing, said first share being a major share.