Detergent feeding device and washing machine having same

Abstract

A detergent feeding device including a case including a receiving portion and an outlet, a siphon tube, to protrude from the bottom surface of the receiving portion, including a first flow path, a siphon cap, to cover an outer side of the siphon tube, including an agitating blade configured to be rotated by water supplied to the receiving portion, the siphon cap to form a second flow path to guide the water supplied to the receiving portion toward the outlet of the case through the first flow path of the siphon tube, and a plurality of support ribs, to extend from an inner surface of the siphon cap toward the siphon tube, configured to be supported by the siphon tube, wherein a cross-section of a corner at which the plurality of support ribs and the inner surface of the siphon cap meet has a curved shape.

1 . A detergent feeding device, comprising:
 a case including a receiving portion to receive detergent, and an outlet on a bottom surface of the receiving portion;   a siphon tube, to protrude from the bottom surface of the receiving portion, including a first flow path;   a siphon cap, to cover an outer side of the siphon tube, including an agitating blade configured to be rotated by water supplied to the receiving portion to agitate the water, the siphon cap to form a second flow path while the siphon cap covers the outer side of the siphon tube to guide the water supplied to the receiving portion toward the outlet of the case through the first flow path of the siphon tube; and   a plurality of support ribs, to extend from an inner surface of the siphon cap toward the siphon tube, configured to be supported by the siphon tube;   wherein a cross-section of a corner at which the plurality of support ribs and the inner surface of the siphon cap meet has a curved shape.   
     
     
         2 . The detergent feeding device of  claim 1 , wherein
 a ratio of a cross-sectional area of an outlet of the second flow path to a cross-sectional area of the first flow path is in a range of 1.5 to 2.5.   
     
     
         3 . The detergent feeding device of  claim 1 , wherein the plurality of support ribs comprises:
 a first support portion configured to support an upper surface of the siphon tube, and   a second support portion, to extend from the first support portion, configured to support an outer surface of the siphon tube.   
     
     
         4 . The detergent feeding device of  claim 3 , wherein
 the first support portion extends along a lateral direction from the inner surface of the siphon cap, and   the second support portion has a length L extending from the first support portion along a longitudinal direction intersecting the first support portion, wherein the length L of the second support portion is shorter than ½ of a height H of the siphon tube.   
     
     
         5 . The detergent feeding device of  claim 3 , wherein a chamfered surface is provided at a lower end of the second support portion. 
     
     
         6 . The detergent feeding device of  claim 1 , wherein a radius of curvature of the cross-section of the corner is 0.75 mm. 
     
     
         7 . The detergent feeding device of  claim 1 , wherein the plurality of support ribs comprise at least three support ribs equally spaced along a circumferential direction of the siphon cap. 
     
     
         8 . The detergent feeding device of  claim 1 , wherein the bottom surface comprises a recessed portion recessed around the outlet, and
 the recessed portion comprises a remaining water drainage hole.   
     
     
         9 . The detergent feeding device of  claim 8 , wherein
 the remaining water drainage hole comprises a small diameter portion adjacent to the receiving portion, and a large diameter portion having a diameter larger than the small diameter portion and adjacent to an outer side of the receiving portion.   
     
     
         10 . The detergent feeding device of  claim 1 , wherein a sidewall of the case comprises an air hole for entry and exit of external air into and out of the receiving portion. 
     
     
         11 . The detergent feeding device of  claim 1 , wherein
 a ratio of a cross-sectional area of the second flow path to a cross-sectional area of the first flow path is 1.5 to 2.5, and   a length L of the plurality of support ribs extending along a longitudinal direction from an upper end of the siphon tube is in a range of ⅓ to ½ of a height H of the siphon tube.