排水ポンプ

Japanese Patent JP6375285

B2

[Object] Provided is a drainage pump which achieves a further improvement in quietness during an operation. [Solving Means] A rotating blade (50) used in a drainage pump (1) includes: large-diameter blades (60) provided with paddle surfaces (61) formed in a plurality of plate shapes extending in a radial direction from a shaft portion (52) connected to an output shaft of a motor; a plurality of plate-shaped small-diameter blades (54) connected to lower end edge portions of the large-diameter blades (60); and auxiliary blades (70) which are provided with paddle surfaces (71) and are provided between the adjacent large-diameter blades (60). Hitherto, water scraped by the paddle surfaces (61) and (71) of the large-diameter blades (60) and the auxiliary blades (70) becomes a water flow in a yz direction by an upper edge portion (62) and a water flow in an xy direction by a side edge portion (63), and the water flows collide with each other at rear surfaces of the paddle surfaces, generate turbulence, and cause noise. However, the water flows can be suppressed to become water flows in the xy direction by a water flow direction regulation portion (101), and the generation of turbulence is suppressed by the collision of the water flows. Therefore, the generation of noise can be prevented.

Katsuji Sato
Naoki Oki
Masaki Sugino
Tomoya Kato

JP2015225819A

August 15, 2018

November 18, 2015

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Fuji Koki Co., Ltd.

F04D29/24; F04D1/14; F04D29/66

JP2011069257A
JP2013064396A
JP2004353496A
JP2009030587A
JP63098498U
JP2010007909A

Patent Business Corporation Daiichi International Patent Office

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