| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage device which can efficiently generate a flow of cleaning water by drain water flowing into a drain water bowl in a sink bottom part and wash inside the drain water bowl.SOLUTION: A drainage device flows drain water into a drain water bowl 32 from a sink 10 and drains from a drainage port 62 at the bottom part 30. Inside the drain water bowl 32, an impeller 88, which applies a force with rotation of its own to the flow of the drain water toward the drainage port 62 from the bottom 30 around at the drainage port 62 to prevent the flow of the drain water and pushes back, is installed. The impeller 88 has a rotary blade 138, which extends toward an outer peripheral end from the side of a rotational axis 86 and hits in a rotation direction to the drain water, at a periphery part around the rotational axis 86, and has an outflow opening 134 of the drain water, which is communicated with the drainage port 62 and is penetrated vertically, on an inner peripheral side. |
