DRAIN DISCHARGE PUMP

摘要

PROBLEM TO BE SOLVED: To restrict the generation of noises and vibration associated with breaking of bubbles by allowing churning of drain water smoothly without altering the conventional structure of a drain pump significantly to reduce the generation of the bubble when it is done with the rotation of a blade. SOLUTION: In a drain discharge pump, main vanes 22 are formed radially from a rotating axis 21 having a clearance with the inner circumferential surface of the body of a pump while a roughly triangular auxiliary blade 29 is provided below the rotating axis 21. A drain water guide part 25 is provided with a clearance 23 separated from the rotating axis 21 following the outer circumference of the main vanes 22 and the auxiliary blade 29. The drain water guide part 25 has an impeller 20 in which an inverted cone-shaped surface 24 is formed on the undersurface thereof while a plurality of guide surface parts 28 are arranged on the top surface thereof in the circumferential direction thereof being inclined downward in the direction of rotating the blade.