Drum type washing machine

Abstract

Includes bottomed, cylindrical water tub ( 3 ) having water tub opening ( 13 ), provided inside cabinet ( 2 ); bottomed, cylindrical rotating drum ( 4 ) having drum opening ( 54 ), provided inside water tub ( 3 ); and motor ( 6 ) attached onto outer bottom surface ( 30 ) of water tub ( 3 ), for rotating drum ( 4 ) on a rotation axis horizontal or downward inclined toward the bottom. Further includes circulation tube ( 16 ) communicatively connecting the bottom side of water tub ( 3 ) with the side of water tub opening ( 13 ), for circulating washing water in water tub ( 3 ) from the bottom side to the side of water tub opening ( 13 ); and a plurality of ejection holes ( 53 ) for ejecting washing water circulated toward the inside of rotating drum ( 4 ). Washing water ejected from the plurality of ejection holes ( 53 ) toward the inside of rotating drum ( 4 ) is fed to the laundry efficiently, thereby increasing the washing power.

1 . A drum type washing machine comprising:
 a cabinet;   a bottomed cylindrical water tub having a water tub opening, placed inside the cabinet;   a bottomed cylindrical rotating drum having a drum opening, placed inside the water tub;   a motor attached to an outer bottom surface of the water tub for rotating the rotating drum on a rotation axis horizontal or tilted down toward the bottom of the rotating drum;   a circulation tube communicatively connecting a bottom side of the water tub with a side of the water tub opening for circulating washing water in the water tub from the bottom side to the side of the water tub opening; and   a plurality of ejection holes for ejecting the washing water circulated through the circulation tube toward the inside of the rotating drum.   
     
     
         2 . The drum type washing machine of  claim 1 , wherein the washing water is ejected from the plurality of ejection holes in directions different from one another. 
     
     
         3 . The drum type washing machine of  claim 2 , wherein the plurality of ejection holes are disposed to the right and left sides with respect to a perpendicular line passing through a center of the drum opening. 
     
     
         4 . The drum type washing machine of  claim 2 , wherein the washing water ejected from each of the plurality of ejection holes has different diffusion angles. 
     
     
         5 . The drum type washing machine of  claim 2 , wherein washing water is ejected simultaneously from the plurality of ejection holes. 
     
     
         6 . The drum type washing machine of  claim 2 , wherein the washing water is ejected from the ejection holes into the rotating drum through between an inside surface of a front-surface wall of the water tub and an outside surface of a front-surface wall of the rotating drum. 
     
     
         7 . The drum type washing machine of  claim 1 , further comprising:
 a water duct at a front-surface wall of the water tub, connected to the circulation tube;   a plurality of discharge outlets in the water duct for discharging the washing water between an inside surface of the front-surface wall of the water tub and an outside surface of a front-surface wall of the rotating drum; and   a plurality of guide surfaces formed on the inside surface of the front-surface wall of the water tub for guiding the washing water discharged from the discharge outlets to the ejection holes,   wherein the guide surfaces have two or more different shapes.   
     
     
         8 . The drum type washing machine of  claim 7 , wherein the plurality of guide surfaces are formed of slopes having two or more different gradient angles. 
     
     
         9 . The drum type washing machine of  claim 7 , wherein the plurality of guide surfaces are formed of curved surfaces having two or more different curve radiuses. 
     
     
         10 . The drum type washing machine of  claim 7 , wherein at least one of the plurality of guide surfaces is formed of a curved surface and a slope. 
     
     
         11 . The drum type washing machine of  claim 7 , wherein at least one of the plurality of guide surfaces has a plurality of gradient angles. 
     
     
         12 . The drum type washing machine of  claim 7 , wherein an extreme front end of each of the plurality of guide surfaces has a chamfered shape. 
     
     
         13 . The drum type washing machine of  claim 7 , wherein an extreme front end of each of the guide surfaces has an arc-shaped rounded cross section with roundness. 
     
     
         14 . The drum type washing machine of  claim 7 , wherein a rib for interfering with a flow of the washing water is provided inside the water duct near at least one of the plurality of discharge outlets inside the water duct. 
     
     
         15 . The drum type washing machine of  claim 1 , further comprising:
 a water duct at a front-surface wall of the water tub, connected to the circulation tube;   a plurality of discharge outlets in the water duct for discharging the washing water between an inside surface of the front-surface wall of the water tub and an outside surface of a front-surface wall of the rotating drum; and   a plurality of guide surfaces formed on the inside surface of the front-surface wall of the water tub for guiding the washing water discharged from the discharge outlets to the ejection holes,   wherein the plurality of discharge outlets have two or more different shapes.   
     
     
         16 . The drum type washing machine of  claim 15 ,
 wherein the plurality of discharge outlets have openings facing a rotation center of the rotating drum, and the openings have opening widths different from one another, the widths being circumferential sizes of the openings.   
     
     
         17 . The drum type washing machine of  claim 15 ,
 wherein the plurality of discharge outlets have openings facing a rotation center of the rotating drum, and the openings have opening distances different from one another, the distances being sizes in a direction perpendicular to a circumferential direction of the openings.   
     
     
         18 . The drum type washing machine of  claim 15 ,
 wherein at least one of the plurality of discharge outlets has an opening facing a direction shifted from a rotation center of the rotating drum.   
     
     
         19 . The drum type washing machine of  claim 15 , wherein a rib for interfering with a flow of the washing water is provided inside the water duct near at least one of the discharge outlets inside the water duct.