Patent ID: 7670105

Claim:
A drain pump, comprising: a casing including a drain inlet configured to suck in drain water at a lower end part, and a drain outlet configured to discharge drain water at a side part; and an impeller including a shaft part extending in a vertical direction within said casing, a main blade disposed on an outer circumferential side of said shaft part, an auxiliary blade disposed on a lower side of said main blade, and a disc shaped dish part disposed between said main blade and said auxiliary blade, said main blade being formed so that a blade height of said main blade decreases from an inner circumferential edge part of said main blade toward an outer circumferential edge part of said main blade, and at least a portion of a radially extending outward edge of the main blade is angularly inclined relative to the rotational axis of said shaft part, said portion of said radially extending outward edge of said main blade being arranged on a side of said main blade opposite said auxiliary blade.