| 摘要 |
A water and air pumping apparatus for a fish-raising pool includes a shaded-pole motor, a centrifugal water-pumping mechanism and an air-pumping drum device, and is characterized in that on the suitable side surface of the laminated core of the motor, there are provided with two longitudinal grooves, and the apparatus further includes a magnet connected to the air-pumping drum device and so disposed as to face the grooves and to be capable of transversely reciprocating so that a strong variant magnetic field resulted by the provision of grooves will reciprocate the magnet and thus the air-pumping drum device is activated, when the motor drives the water-pumping mechanism.
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