| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drainage pump configured to allow the inside to be easily checked. <P>SOLUTION: The drainage pump 1 includes a pump body 10 manufactured by a transparent resin material, a rotary blade 30, and a lid member 50. A gas-liquid boundary surface GL formed in a pump chamber 20 during operation is located in A-F depending on the operation conditions. The gas-liquid boundary surface GL is visually controlled in the range of B-E to obtain a low-noise drainage pump. Marks P<SB POS="POST">1</SB>, P<SB POS="POST">2</SB>on the rotary blade 30 can be easily seen from the outside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
