Patent ID: 7435048

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 dish part including an annular partition part extending upward from an outer circumferential edge part of the dish part, and a central opening, said main blade having an outer circumferential edge part that is disposed at a position lower than an upper end part of said partition part, and said main blade has an outer circumferential edge that is inclined so that a blade height of the outer circumferential part of said main blade decreases toward the outer circumferential edge part of said dish part.