Washing machine and washing method thereof

Abstract

A washing machine includes: an outer tank configured to contain washing water; a rotatable inner tank installed inside the outer tank; and an auxiliary washing device installed in the inner tank, wherein the auxiliary washing device comprises a rotation body configured to rotate according and relative to the inner tank.

What is claimed is: 
     
         1 . A washing machine, comprising:
 an outer tank configured to contain washing water;   a rotatable inner tank inside the outer tank; and   an auxiliary washing device on the inner tank, wherein the auxiliary washing device comprises a rotation body configured to rotate according and relative to the inner tank.   
     
     
         2 . The washing machine of  claim 1 , wherein the auxiliary washing device further comprises a support body, wherein the rotation body is coupled to an axis extending from the support body and rotates according to the rotation of the inner tank. 
     
     
         7 . The washing machine of  claim 2 , wherein the support body is installed inside the inner tank length-wise in the horizontal direction and protrudes toward the center of the inner tank. 
     
     
         4 . The washing machine of  claim 2 , wherein the axis rotates freely without power according to the rotation of the inner tank. 
     
     
         5 . The washing machine of  claim 2 , wherein the axis rotates using power delivered from a motor located outside the inner tank. 
     
     
         6 . The washing machine of  claim 1 , wherein the rotation body comprises a base and a protrusion protruding from the base. 
     
     
         7 . The washing machine of  claim 6 , wherein two or more panels are formed on the support body. 
     
     
         8 . The washing machine of  claim 6 , wherein the protrusion has a shaped selected from the group consisting of: a cross; and a linear shape. 
     
     
         9 . A method of washing, comprising:
 rotating an inner tank of a washing machine; and   rotating a rotation body coupled to the inner tank, wherein the rotation body rotates relative to the rotation of the inner tank, wherein items of laundry in the inner tank contact the rotation body and are caused to be rubbed against each other by the movement of the rotation body; and wherein the rotation body causes the laundry to be lifted to the top of the inner tank as the inner tank rotates.   
     
     
         10 . The method of  claim 9 , wherein the auxiliary washing device further comprises a support body, wherein the rotation body is coupled to a support body and to an axis extending from the support body, and rotates according to the rotation of the inner tank. 
     
     
         11 . The method of  claim 10 , wherein the support body is installed inside the inner tank length-wise in the horizontal direction and protrudes toward the center of the inner tank. 
     
     
         12 . The method of  claim 10 , wherein the axis rotates freely without power according to the rotation of the inner tank. 
     
     
         13 . The method of  claim 10 , wherein the axis rotates using power delivered from a motor located outside the inner tank. 
     
     
         14 . The method of  claim 9 , wherein the rotation body comprises a panel and a protrusion protruding from the panel.