| 摘要 |
A high efficiency impeller-type aerator designed for aeration of the water supply of aquatic organisms has a first impeller, a second impeller, and a pump casing having at least one water inlet, one air inlet, and one water outlet. The first and second impellers are disposed between the pump water inlet and outlet, and the pump casing includes constricted portions in association with the first and second impeller to define axial flow direction boundaries. The air inlet is located at the constricted portion, and the axial flow direction boundaries define a channel through which the second impeller urge water to facilitate low pressure that creates a venturi which causes air suction at the pump air inlet.
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