| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump capable of reducing the generation of noise by shielding water noise generated in a pump chamber by the flow of water. SOLUTION: This pump comprises a motor part 10 having a water suction port 11 and a water discharge port 41 and incorporating a motor and a pump part 30 formed by disposing an impeller 23 fitted to the rotating shaft of the motor in the pump chamber 31. Water flows in a flow passage formed between the outer periphery of the impeller 23 and the peripheral wall 54 of the pump chamber 31. The flow passage comprises a first flow passage formed on the outer periphery of the impeller 23 and a second flow passage 33 formed by forming and an annular partition wall 36 with water passing holes 37 on the outside of the first flow passage 32 and demarcating the partition wall. COPYRIGHT: (C)2005,JPO&NCIPI
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