To reduce noise of a drain pump, by restraining the expansion of an air layer formed in an impeller of the drain pump to an outer peripheral part of main blades.
This drain pump 108 has a pump casing 181 and the impeller 182. The pump casing 181 has a drain suction port 181a for sucking drain water in a lower end part, and a drain delivery port 181b for delivering the drain water to a side part. The impeller 182 has a shaft part 191 arranged so as to extend in the vertical direction in the pump casing 181, a plurality of main blades 192 radially arranged on the outer peripheral side of the shaft part 191, an auxiliary blade 194 arranged on the lower side of the main blades 192, and a disk-like pan part 193 arranged between the main blades 192 and the auxiliary blade 194 and having an opening part 193a in the center; and rotates around the shaft part 191. The pan part 193 has a communicating part 193c for allowing an upper side space to communicate with a lower side space of the pan part 193 on the more outer peripheral side than the central opening part 193a.
| JP3580327 | DRAINAGE PUMP |
| JP5658526 | Drain pump |
TAKEUCHI MAKIO
HIRAI MASAKAZU
MAEDA KAZUE
IWANAGA HIRONORI
Hidetada Kato