Dryer

Abstract

The present application relates to a dryer comprising: a case forming the exterior thereof; a drum which is provided inside the case and which accommodates an object to be dried; and a driving part which is provided so as to drive the drum and which includes a motor having a stator and a rotor, wherein the case includes a rear case forming the exterior of the rear part of the dryer, the rotor is supported to be coaxially rotatable with a rotational axis of the drum with respect to the rear case on the outer side of the rear case, and the stator is fixed to the rear case on the outer side of the rear case.

1 . A dryer, comprising:
 a case forming to support an appearance of the dryer;   a drum provided within the case to receive a drying object therein; and   a drive unit configured to drive the drum and including a motor having a stator and a rotor,   wherein the case includes a rear case forming to support a rear appearance of the dryer,   wherein the rotor is supported on an outside of the rear case in a manner of being coaxially rotatable to the rear case on a rotation axis of the drum, and   wherein the stator is fixed to the rear case on the outside of the rear case.   
     
     
         2 . The dryer of  claim 1 , wherein the drive unit comprises a power transfer unit transferring a rotation force of the rotor to the drum and wherein the power transfer unit is provided between the rotor and the drum. 
     
     
         3 . The dryer of  claim 2 , wherein the motor comprises an outer rotor type motor having the rotor provided to be rotatable on a radial outside of the stator. 
     
     
         4 . The dryer of  claim 2 , wherein the stator having a hollow part provided to a radial inside is fixed to an outside of the rear case. 
     
     
         5 . The dryer of  claim 4 , comprising a connector provided between the stator and the rear case to fix the stator to the rear case and form a front-rear space between the stator and the rear case. 
     
     
         6 . The dryer of  claim 5 , wherein a portion of the connector is inserted in the hollow part of the stator. 
     
     
         7 . The dryer of  claim 5 , wherein the connector has a hollow part provided to a radial inside. 
     
     
         8 . The dryer of  claim 7 , wherein the power transfer unit includes a decelerator transforming high-RPM low-torque of the rotor into low-RPM high-torque of the drum and wherein at least one portion of the decelerator is located by being inserted in the hollow part of the connector. 
     
     
         9 . The dryer of  claim 2 , the power transfer unit comprising:
 a drum shaft connected to a rear side of the drum;   a rotor shaft connected to the rotor; and   a decelerator provided between the drum shaft and the rotor shaft.   
     
     
         10 . The dryer of  claim 9 , wherein a shaft perforated hole perforated by the drum shaft is formed in the rear case. 
     
     
         11 . The dryer of  claim 10 , the decelerator comprising:
 a housing; and   a transforming device provided within the housing to transform high-RPM low-torque of the rotor into low-RPM high-torque of the drum.   
     
     
         12 . The dryer of  claim 11 , wherein the housing of the decelerator is fixed to an outside of the rear case. 
     
     
         13 . The dryer of  claim 12 , the housing of the decelerator, comprising:
 a drum shaft perforated hole projected in prescribed length in front direction to be perforated by the drum shaft and having a bearing installed inside to support the drum shaft rotatably; and   a rotor shaft perforated hole projected in prescribed length in rear direction to be perforated by the rotor shaft and having a bearing installed inside to support the rotor shaft rotatably.   
     
     
         14 . The dryer of  claim 13 , wherein the drum shaft perforated hole is located by being inserted in the shaft perforated hole of the rear case and wherein the rotor shaft perforated hole is located in a hollow part formed in a radial inside of the stator. 
     
     
         15 . The dryer of  claim 1 , wherein a shaft perforated hole perforated by a drum shaft connected to the drum to transfer power of the rotor to the drum is formed in the rear case and wherein an installation area for installation of the drive unit is formed on a radial outside centering on the shaft perforated hole in the rear case. 
     
     
         16 . The dryer of  claim 15 , wherein an air supply area for supplying air into the drum is formed in the rear case and wherein the air supply area is formed on a radial outside of the installation area centering on the installation area. 
     
     
         17 . The dryer of  claim 16 , wherein an air intake area for sucking air from the drum is formed in the rear case and wherein the air intake area is formed on a radial outside of the air supply area. 
     
     
         18 . The dryer of  claim 17 , comprising a flow path duct coupled to the rear case on an outside of the rear case so as to form an air flow space with the rear case in between by covering the air intake area and the air supply area. 
     
     
         19 . The dryer of  claim 15 , wherein a donut-shaped air intake area confronting the air supply area of the rear case is formed in a rear wall of the drum. 
     
     
         20 . The dryer of  claim 19 , comprising a gasket provided between the rear case and the rear wall of the drum to enable air supplied from the air supply area of the rear case to flow into the air intake area of the drum.