| 摘要 |
PURPOSE: A drainage pump is provided to prevent vibration or noise even lowering the height of a ring-shaped wall member, thereby improving a discharging capacity and operating quietly. CONSTITUTION: A drainage pump comprises a motor, a rotary blade(70), and a housing unit. The rotary blade is connected to an output shaft of the motor. An inlet is formed in the lower part of the housing unit, and an outlet is formed in a side of the housing unit. The housing unit accommodates the rotary blade to be freely rotated. The rotary blade includes a shaft unit(52) connected to the output shaft of the motor, a plurality of plate-shaped large blades(60A,60B) extended in a radial direction from a shaft unit, and a plurality of plate-shaped small blades(54) connected to the lower parts of the large blades. |
