Hair dryer

Abstract

The present disclosure provides a hair dryer, the hair dryer including a housing, a switch unit, a controller, a fan unit, and a heating unit, wherein the heating unit is configured such that a non-magnetic field is formed by a first heating coil and a second heating coil being twisted in a shape of a twisted bread stick, where the first heating coil is flowed by a current of first direction and the second heating coil is flowed by a current of second direction opposite to the first direction, at least one of the first coil and the second coil is coated with an insulating shield member, and the first coil and the second coil is wound on a support member in a spiral shape.

What is claimed is:  
     
         1 . A hair dryer, the hair dryer comprising:
 a housing including a handle graspable by a user, a suction grille introduceable of air, and a nozzle discharging a heated air;   a switch unit connected at one end to a power unit to open and close a power supply by being interlocked to a user switching operation;   a controller receiving a power by being connected to the switch unit and mounted with an automatic ground circuit configured to ground-process an electromagnetic wave generated during power supply;   a fan unit mounted inside the housing and operated by a driving motor configured to discharge an air to the nozzle by introducing the air through the suction grille; and   a heating unit mounted on a path between the suction grille and the nozzle to heat the air discharged by the fan unit,   wherein the heating unit is configured such that a non-magnetic field is formed by a first heating coil and a second heating coil being twisted in a shape of a twisted bread stick, where the first heating coil is flowed by a current of first direction and the second heating coil is flowed by a current of second direction opposite to the first direction, at least one of the first coil and the second coil is coated with an insulating shield member, and the first coil and the second coil is wound on a support member in a spiral shape.   
     
     
         2 . The hair dryer of  claim 1 , wherein the first and second coils twisted in the shape of a twisted bread stick are formed by being twisted again in a spring shape. 
     
     
         3 . The hair dryer of  claim 1 , further comprising an electromagnetic wave shield unit interposed between the housing and the heating unit to shield the heat and electromagnetic wave from the heating unit from being transmitted to the housing and a user. 
     
     
         4 . The hair dryer of  claim 3 , wherein the electromagnetic wave shield unit includes a plating unit formed by being plated on an inner wall surface of the housing with a conductive material, a first mesh member arranged at a position corresponding to that of a suction grille of the driving motor, a second mesh member arranged at a position corresponding to that of the nozzle, wherein the first and second mesh members are formed by any one of a fish net shape and a plate member having a plurality of through holes. 
     
     
         5 . The hair dryer of  claim 3 , wherein the electromagnetic wave shield unit includes an electromagnetic wave shield member mounted at a space formed by the heating unit, the fan unit and the housing to wrap a circumference of the heating unit and the fan unit, and an insulation member interposed among the electromagnetic wave shield member, the heating unit and the fan unit. 
     
     
         6 . The hair dryer of  claim 5 , wherein the electromagnetic wave shield member is formed by any one material of permalloy and a silicon steel plate. 
     
     
         7 . The hair dryer of  claim 5 , wherein the electromagnetic wave shield member forms the electromagnetic wave shield unit by rolling a plate-shaped member in any one shape of a cylinder and a cone. 
     
     
         8 . The hair dryer of  claim 6 , wherein the electromagnetic wave shield member forms the electromagnetic wave shield unit by rolling a plate-shaped member in any one shape of a cylinder and a cone. 
     
     
         9 . The hair dryer of  claim 5 , wherein the electromagnetic wave shield member is grounded. 
     
     
         10 . The hair dryer of  claim 6 , wherein the electromagnetic wave shield member is grounded. 
     
     
         11 . The hair dryer of  claim 6 , wherein the electromagnetic wave shield member is formed by rolling a plate-shaped member in any one shape of a cylinder and a cone, and both distal ends of the plate-shaped member are fixed by any one method of a riveting, a welding and an adhesive fixing. 
     
     
         12 . The hair dryer of  claim 6 , wherein the electromagnetic wave shield member is formed by rolling a plate-shaped member in any one shape of a cylinder and a cone, and both distal ends of the plate-shaped member are fixed by any one method of a riveting, a welding and an adhesive fixing. 
     
     
         13 . The hair dryer of  claim 3 , wherein the electromagnetic wave shield unit includes a plating unit formed by being plated on an inner wall surface of the housing with a conductive material, a first mesh member arranged at a position corresponding to that of a suction grille of the driving motor, a second mesh member arranged at a position corresponding to that of the nozzle, and an electromagnetic wave shield member formed by any one material of permalloy and a silicon steel plate, and mounted at a space formed by the heating unit, the fan unit and the housing to wrap a circumference of the heating unit and the fan unit, wherein the first and second mesh members are formed by any one of a fish net shape and a plate member having a plurality of through holes. 
     
     
         14 . The hair dryer of  claim 3 , wherein the controller includes a driving motor configured to drive the fan unit, and an automatic ground circuit configured to be connected to the electromagnetic wave shield unit to shield an electromagnetic wave generated during power supply. 
     
     
         15 . A hair dryer, the hair dryer comprising:
 a housing including a handle graspable by a user, a suction grille introduceable of air, and a nozzle discharging a heated air;   a switch unit connected at one end to a power unit to open and close a power supply by being interlocked to a user switching operation;   a controller receiving a power by being connected to the switch unit and mounted with an automatic ground circuit configured to ground-process an electromagnetic wave generated during power supply;   a fan unit mounted inside the housing and operated by a driving motor configured to discharge an air to the nozzle by introducing the air through the suction grille;   a heating unit mounted on a path between the suction grille and the nozzle to heat the air discharged by the fan unit;   an electromagnetic wave shield member mounted at a space formed by the heating unit, the fan unit and the housing to wrap a circumference of the heating unit and the fan unit, and formed by any one material of permalloy and a silicon steel plate, wherein   the heating unit is configured such that a support member is alternately wound at a predetermined distance with a first heating coil flowed by a current of a first direction and a second heating coil flowed by a current of a second direction, and   wherein the electromagnetic wave shield unit includes a plating unit formed by being plated on an inner wall surface of the housing with a conductive material, a first mesh member arranged at a position corresponding to that of a suction grille of the driving motor, a second mesh member arranged at a position corresponding to that of the nozzle, and wherein   the first and second mesh members are formed by any one of a fish net shape and a plate member having a plurality of through holes.   
     
     
         16 . The hair dryer of  claim 15 , wherein each of the first and second heating coils is provided in a zigzag shape to increase an area contacted by air. 
     
     
         17 . The hair dryer of  claim 15 , wherein the first and second heating coils are provided with a single coil member, wherein the first heating coil is formed by winding of the second heating coil to a direction opposite to a direction of the first heating coil being wound to a distal end of the support member.