| 摘要 |
PROBLEM TO BE SOLVED: To secure quietness by preventing air from being sucked, in a water discharge pump configured in such a manner that, with a cylindrical suction opening 12 immersed in a drain pan, a small impeller 22 within the suction opening 12 is rotated to suck water into the suction opening 12. SOLUTION: The suction opening 12 is provided with a reduced-diameter section 12a located in the middle of the inside thereof and formed by reducing the inner diameter thereof. The reduced-diameter section 12a is located at a position which is about 30-50% of the overall length of the small impeller 22 from the lower end 221 of the small impeller 22. The amount of water is controlled by reducing the gap between the suction opening 12 and the small impeller 22 by the reduced-diameter section 12a, and this causes the water level within the drain pan to be secured even in a balanced state and prevents air from being sucked. The adhesion of slime is also prevented by a reverse flow at the reduced-diameter section 12a. COPYRIGHT: (C)2011,JPO&INPIT |
