| 摘要 |
PURPOSE: A circulator and an impeller for a circulator are provided to always aspirate fluid in upper part of a tank through a suction inlet locating on upper side of a sliding suction pipe by a sub inlet. CONSTITUTION: A circulator and an impeller comprise an underwater motor(2), an impeller(3), a sliding suction pipe(5), a fluid suction inlet(8), and a sub inlet(9). The underwater motor is supported by a supporting unit(1). The impeller rotates around an axis by the underwater motor. In the sliding suction pipe, a side pipe(7) slides from the outer side of an inner side pipe to a connection part of upper part. The fluid suction inlet and the sub inlet are installed on the sliding suction pipe. Always fluid in water surface is aspirated through the fluid suction inlet in the top of the sliding suction pipe by the sub inlet.
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