Washing machine and a washing method

Abstract

The present disclosure discloses a washing machine and a washing method, the washing machine comprises a washing tub and a pulsator at a bottom of the washing tub, the pulsator includes a pulsator disk and a plurality of stirring blades arranged on a surface of the pulsator disk. The pulsator disk is a disk-like structure with a bulge at center, each stirring blade extends from the center of the pulsator disk to an edge. A plurality of strip-shaped ribs are vertically arranged on an inner wall of the washing tub, there is a distance between an outside edge of the pulsator and a bottom edge of the inner wall of the washing tub. A tub bottom outer ring is arranged between the outside edge of the pulsator and the bottom edge of the inner wall of the washing tub. A junction of the tub bottom outer ring and the inner wall of the washing tub is circumferentially provided with a plurality of bumps projecting from the tub bottom outer ring and the inner wall of the washing tub. The washing machine is capable of saving wash water, increasing detergent concentration, increasing the frequency of up-and-down flipping, increasing the cleaning ratio and the uniformity of laundry cleanness, reducing wash time and tangling among laundries. With evenly distributed laundry in the tub during washing process, facilitating the stability of subsequent dehydration.

1 . A washing machine comprising,
 a washing tub and a pulsator at a bottom of the washing tub,   the pulsator including a pulsator disk and a plurality of stirring blades being arranged on a surface of the pulsator disk,   wherein the pulsator disk is a disk-like structure with a bulge at center,   each stirring blade extends from the center of the pulsator disk to an edge,   and a plurality of strip-shaped ribs are vertically arranged on an inner wall of the washing tub.   
     
     
         2 . The washing machine according to  claim 1 , wherein there is a distance between an outside edge of the pulsator and a bottom edge of the inner wall of the washing tub,
 a tub bottom outer ring is arranged between the outside edge of the pulsator and the bottom edge of the inner wall of the washing tub, and   a junction of the tub bottom outer ring and the inner wall of the washing tub is circumferentially provided with a plurality of bumps projecting from the tub bottom outer ring and the inner wall of the washing tub.   
     
     
         3 . The washing machine according to  claim 2 , wherein a ratio of a width of the tub bottom outer ring to a radius of the pulsator is in a range from 1:5 to 1:3,
 a number of the bumps is in a range from 3 to 15, preferably a range from 6 to 12, and a ratio of a height of the bumps to a height of the pulsator is in range from 1:3 to 1:2, preferably 1:2.1.   
     
     
         4 . The washing machine according to  claim 1 , wherein a number of the strip-shaped ribs is in a range from 3 to 6, a plurality of strip-like ribs are uniformly provided on the inner wall of the washing tub,
 and a ratio of a protruding height of the strip-shaped ribs to a width of the tub bottom outer ring is in a range from 1:2 to 1:1.   
     
     
         5 . The washing machine according to  claim 1 , wherein a height of an upper surface of the stirring blades that extends from the center to the edge of the pulsator disk changes as: ascending from the center of the pulsator disk to a highest position and then descending, to form an inclined ramp transition with the edge of the pulsator disk. 
     
     
         6 . The washing machine according to  claim 1 , wherein the stirring blades comprise at least two ribs which are respectively inclined toward both sides in an extension direction of the stirring blades to form a twisted stirring blade structure,
 the stirring blades in the extension direction is a straight line or a curve,   the stirring blades in the extension direction being a curve means that curvatures or slopes of projections of at least two ribs of the stirring blades in the surface of the pulsator disk are different, or the stirring blades are at least composed of a combination of an arc-shaped rib and a straight line rib.   
     
     
         7 . The washing machine according to  claim 6 , wherein the stirring blades comprise a first segment rib adjacent the center of the pulsator disk and a second segment rib adjacent the edge of the pulsator disk,
 the first segment rib and second segment rib are respectively inclined to surfaces of the pulsator disk on different sides in the extension direction of the stirring blades,   an inclination of the first segment rib and second segment rib to a vertical plane of the surface of the pulsator disk with respect to a line where the stirring blades and the surface of the pulsator disk surface intersect is less than or equal to 35°,   two side surfaces of the stirring blades and the surface of the pulsator disk are smooth transition.   
     
     
         8 . The washing machine according to  claim 1 , wherein a center angle between two ends of the stirring blades is in a range from 15° to 90°. 
     
     
         9 . The washing machine according to  claim 1 , wherein a plurality of decorative areas are arranged on the surface of the pulsator disk between the two stirring blades, and the decorative areas are provided with water permeable holes,
 the decorative areas are shallow grooves with different size and water-trail-shaped, a depth is in a range from 1 to 5 mm, the shallow grooves are provided with at least one water permeable hole.   
     
     
         10 . A washing method of the washing machine according to  claim 1 , wherein,
 during washing process, laundry is loaded into the washing tub, water is flooded in enough to wet laundry, so that a weight of the wet laundry falls on a pulsator,   the pulsator rotates reversely with respect to the washing tub, the laundries in the washing tub as a whole is driven to rotate reversely by a plurality of strip-shaped ribs on the inner wall of the washing tub and a plurality of bumps on the tub bottom outer ring relative to the pulsator in a small angle,   the pulsator pushes the laundry on the bottom and at a periphery of the pulsator to the center through the slope of the stirring blades and a pulsator center part, and pushes the laundry in the center of the pulsator up, it achieves the laundry in the tub doing a constantly rapid floral-like overturn from the center to the periphery, and controlling the pulsator to rotate as a fixed rotation stop ratio to wash or using different rotation stop ratios corresponding to different load rates to wash.   
     
     
         11 . The washing machine according to  claim 3 , wherein the ratio of the width of the tub bottom outer ring to the radius of the pulsator is 1:4. 
     
     
         12 . The washing machine according to  claim 3 , wherein the number of the bumps is in the range from 6 to 12. 
     
     
         13 . The washing machine according to  claim 3 , wherein the ratio of the height of the bumps to the height of the pulsator is 1:2.4. 
     
     
         14 . The washing machine according to  claim 2 , wherein a number of the strip-shaped ribs is in a range from 3 to 6, a plurality of strip-like ribs are uniformly provided on the inner wall of the washing tub,
 and a ratio of a protruding height of the strip-shaped ribs to a width of the tub bottom outer ring is in a range from 1:2 to 1:1.   
     
     
         15 . The washing machine according to  claim 4 , wherein the ratio of the protruding height of the strip-shaped ribs to the width of the tub bottom outer ring is 1:1.5. 
     
     
         16 . The washing machine according to  claim 7 , wherein projections of the first segment rib and the second segment rib on the surface of the pulsator disk are two arcs, centers of the arcs are respectively located on both sides of the stirring blades. 
     
     
         17 . The washing machine according to  claim 2 , wherein a center angle between two ends of the stirring blades is in a range from 15° to 90°. 
     
     
         18 . The washing machine according to  claim 3 , wherein a center angle between two ends of the stirring blades is in a range from 15° to 90°. 
     
     
         19 . The washing machine according to  claim 4 , wherein a center angle between two ends of the stirring blades is in a range from 15° to 90°. 
     
     
         20 . The washing machine according to  claim 8 , wherein the center angle between the two ends of the stirring blades is in the range from 30° to 60°.