Washing machine

Abstract

A washing machine having a balancer provided with enhanced performance, and including a cabinet, a tub disposed at an inside the cabinet to accommodate washing water, a rotating tub having a cylindrical unit to form a circumferential side surface of the rotating tub and rotatively disposed at an inside the tub, a first balancer mounted at an upper portion of the rotating tub to offset an unbalanced load of the rotating tub, and a second balancer mounted at a lower portion of the rotating tub such to offset unbalanced load of the rotating tub by using a portion of the washing water at an inside the rotating tub, the second balancer includes an inner channel to store a portion of the washing water, and an outer channel formed along an outer circumference of the inner channel to offset the unbalanced load of the rotating tub.

What is claimed is: 
     
         1 . A washing machine, comprising:
 a cabinet;   a tub disposed at an inside the cabinet to accommodate washing water;   a rotating tub having a cylindrical unit to form a circumferential side surface of the rotating tub, the rotating tub rotatively disposed at an inside the tub;   a first balancer mounted at an upper portion of the rotating tub to offset an unbalanced load of the rotating tub; and   a second balancer mounted at a lower portion of the rotating tub such that the unbalanced load of the rotating tub is offset by using a portion of the washing water at an inside the rotating tub,   wherein the second balancer, comprises:   an inner channel formed along a circumferential direction of the lower portion of the rotating tub such that a portion of the washing water at an inside the rotating tub is stored; and   an outer channel formed along an outer circumference of the inner channel such that the unbalanced load of the rotating tub is offset.   
     
     
         2 . The washing machine of  claim 1 , wherein an outer surface of the outer channel is formed to have approximately a same radius as a radius of a side surface of the rotating tub. 
     
     
         3 . The washing machine of  claim 1 , wherein the outer channel comprises a plurality of boundary panels formed at an inside thereof to divide the outer channel into a plurality of accommodating units. 
     
     
         4 . The washing machine of  claim 3 , wherein the washing water stored at the inner channel is introduced to at least one of the plurality of accommodating units of the outer channel, such that the unbalanced load of the rotating tub is offset. 
     
     
         5 . The washing machine of  claim 1 , wherein the inner channel is open, such that the washing water flows at an inside the inner channel. 
     
     
         6 . The washing machine of  claim 5 , wherein the washing water stored at the inner channel offsets an initial vibration of the rotating tub while flowing at an inside the inner channel. 
     
     
         7 . The washing machine of  claim 1 , further comprising:
 a penetrating hole configured to communicate the inner channel with the outer channel.   
     
     
         8 . The washing machine of  claim 7 , wherein the washing water stored in the inner channel, when an unbalanced load is generated in the rotating tub, is introduced to the outer channel through the penetrating hole, thereby offsetting the unbalanced load of the rotating tub. 
     
     
         9 . The washing machine of  claim 1 , further comprising:
 an introducing hole configured for washing water to be introduced to at least one of the inner channel and the outer channel from an inside the cylindrical unit.   
     
     
         10 . The washing machine of  claim 1 , wherein the second balancer further comprises:
 a plurality of drain holes formed at a lower portion of at least one of the inner channel and the outer channel, so that the washing water is discharged.   
     
     
         11 . A washing machine, comprising:
 a cabinet;   a tub disposed at an inside the cabinet to accommodate washing water; a rotating tub having a cylindrical unit to form a circumferential side surface of the rotating tub; and   a base plate to support a lower portion of the cylindrical unit,   wherein the base plate, comprises:   at least one channel configured to accommodate washing water and formed along a circumferential direction of the lower portion of the base plate, and   wherein washing water stored in the at least one channel offsets an unbalance load generated in the rotating tub.   
     
     
         12 . The washing machine of  claim 11 , wherein the at least one channel comprises an inner channel formed along the circumferential direction of the lower portion of the base plate to accommodate a portion of the washing water, and an outer channel formed along an outer circumference of the inner channel to offset an unbalanced load of the rotating tub. 
     
     
         13 . The washing machine of  claim 11 , wherein the washing water stored in the inner channel is introduced to at least one of a plurality of accommodating units formed at the outer channel to offset an unbalanced load of the rotating tub. 
     
     
         14 . A washing machine, comprising:
 a cabinet;   a tub disposed at an inside the cabinet to accommodate washing water; and   a rotating tub rotatively disposed an inside the tub;   an inner channel formed along a circumferential direction of a lower portion of the rotating tub to store a portion of the washing water;   an outer channel formed along an outer circumference of the inner channel at the lower portion of the rotating tub to offset an unbalanced load of the rotating tub; and   a penetrating hole to communicate the inner channel with the outer channel, and   wherein when a centrifugal force, to flow the washing water stored at the inner channel over a wall in between the inner channel and the outer channel, is generated due to rotation of the rotating tub, the washing water stored in the inner channel is introduced to the outer channel through the penetrating hole to offset an unbalanced load of the rotating tub.   
     
     
         15 . The washing machine of  claim 14 , wherein the inner channel is open, such that the washing water flows at an inside the inner channel, thereby offsetting an initial vibration of the rotating tub. 
     
     
         16 . The washing machine of  claim 14 , further comprising:
 a drain hole formed at a lower portion of the outer channel, such that the washing water introduced to the outer channel is discharged to an outside.   
     
     
         17 . A washing machine, comprising:
 a cabinet;   a tub disposed at an inside the cabinet to accommodate washing water;   a rotating tub rotatively disposed an inside the tub; and   a balancer mounted at a lower portion of the rotating tub to offset an unbalanced load generated in the rotating tub,   wherein the balancer, comprises:   an inner channel formed along a circumferential direction of the balancer to store a portion of the washing water; and   an outer channel formed along a circumferential direction of an outer circumference of the inner channel to offset an unbalanced load of the rotating tub.   
     
     
         18 . The washing machine of  claim 17 , further comprising:
 a penetrating hole to communicate the inner channel with the outer channel, such that the washing water stored in the inner channel is introduced to the outer channel.   
     
     
         19 . The washing machine of  claim 17 , wherein the inner channel is open, so that the washing water offsets an initial vibration of the rotating tub while flowing at an inside the inner channel. 
     
     
         20 . The washing machine of  claim 17 , wherein the outer channel comprises a plurality of boundary panels formed at an inside the outer channel to divide the outer channel into a plurality of accommodating units. 
     
     
         21 . The washing machine of  claim 17 , further comprising:
 a drain hole formed at a lower portion of the outer channel, such that the washing water introduced to the outer channel is discharged to an outside.   
     
     
         22 . A washing machine, comprising:
 a cabinet;   a tub disposed at an inside the cabinet to accommodate washing water;   a rotating tub having a cylindrical unit to form a circumferential side surface of the rotating tub; and   a base plate to support a lower portion of the cylindrical unit, the base plate comprising an upper portion plate provided with a plurality of stepped portions and a lower portion plate to be coupled with the upper portion plate, the coupled upper portion plate and the lower portion plate to form at least one channel configured to accommodate washing water, and   wherein washing water stored in the at least one channel offsets an unbalance load generated in the rotating tub.   
     
     
         23 . The washing machine of  claim 22 , wherein the at least one channel comprises an inner channel formed along a circumferential direction of the lower portion of the rotating tub to store a portion of the washing water from an inside the rotating tub and an outer channel to form along an outer circumference of the inner channel to offset the unbalanced load of the rotating tub. 
     
     
         24 . The washing machine of  claim 22 , wherein the base plate is formed in a shape of a ring. 
     
     
         25 . The washing machine of  claim 22 , further comprising an upper balancer mounted at an upper portion of the rotating tub to offset the unbalanced load of the rotating tub. 
     
     
         26 . The washing machine of  claim 24 , wherein the upper balancer includes filling liquid to offset the unbalanced load of the rotating tub. 
     
     
         27 . The washing machine of  claim 25 , wherein the filling liquid is salt water.