Light efficient hair dryer

Abstract

The present invention relates to a professional electric hair dryer comprising a housing containing a brushless electric motor driving a blowing means, an electric heating element and a supply circuit including a direct-current power supply for the brushless motor, said supply circuit being arranged in a housing outside the housing of the hair dryer, which electrically connects said housing to the mains.

1 . An electric hair dryer, wherein it comprises both a hair dryer housing, containing an electric motor of brushless type driving blowing means, an electric heating element and also a supply circuit comprising a power supply with direct current for the motor of brushless type, this supply circuit being arranged in a housing external to said housing of the hair dryer and electrically connecting the latter to the mains. 
     
     
         2 . The hair dryer according to  claim 1 , wherein the supply circuit comprises a switch-mode power supply low-voltage. 
     
     
         3 . The hair dryer according to  claim 1 , wherein the mains voltage and the output of the supply circuit are galvanically insulated. 
     
     
         4 . The hair dryer according to  claim 3 , wherein the galvanic insulation is achieved by at least one optoelectronic element. 
     
     
         5 . The hair dryer according to  claim 3 , wherein it is connected electrically to the supply circuit by a cord comprising three wires due to referencing of the continuous output signal of the supply circuit relative to one of the poles of the mains voltage. 
     
     
         6 . The hair dryer according to  claim 1 , wherein it comprises control means for controlling at least the heating circuit and providing speed setpoints to the motor of brushless type, whereof at least one interrupter coupled with a magnet moves near magnetic contactors so as to switch the latter together or individually. 
     
     
         7 . The hair dryer according to  claim 1 , wherein it comprises control means for controlling at least the heating circuit and providing speed setpoints to the motor of brushless type, whereof at least one interrupter selects a speed of the motor and simultaneously modulates the current passing through the heating element as a function of the speed selected so as to retain constant heat. 
     
     
         8 . The hair dryer according to  claim 1 , wherein the motor of brushless type is a motor with inner armature and outer inductor. 
     
     
         9 . The hair dryer according to  claim 1 , wherein the motor of brushless type is a motor of sensorless type with a control circuit determining the position of the rotor by measuring the current induced by the magnets on the non-powered windings. 
     
     
         10 . The hair dryer according to  claim 1  wherein the axis of the motor is connected to the armature-inductor pair at least by means of two rollers arranged near the ends of this armatureinductor pair along said axis of the motor. 
     
     
         11 . The hair dryer according to  claim 1 , wherein the armature and the inductor are mounted concentric in a motor housing and about the axis to which the inductor is connected. 
     
     
         12 . The hair dryer according to  claim 1 , wherein the external power supply housing comprising the supply circuit is arranged to act as support to the hair dryer. 
     
     
         13 . An electric hair dryer with motor of brushless type comprising a motor of brushless type comprising an axis and a armature-inductor pair, wherein the axis of the motor is connected to the armatureinductor pair at least by means of two rollers arranged near the ends of the armature-inductor pair along the axis of the motor. 
     
     
         14 . The hair dryer according to  claim 13 , wherein the armature and the inductor are mounted concentric in a motor housing and about the axis to which the inductor is connected. 
     
     
         15 . The hair dryer according to  claim 1 , wherein the motor comprises a rotor mounted in rotation about a stator and a casing, in the form of a bell, enclosing the stator and the rotor, with a roller receiving the axis of rotation driven by the rotor and connected by one of its ends to the turbine upstream of the motor.