An aerator for injecting air into water includes a hollow tube having an inlet end and an outlet end, a hollow dish-shaped element including an upper conical portion and a lower conical portion, blades and a rotating element. The upper conical portion is connected the outlet end. The lower conical portion is located under the upper conical portion. The lower conical portion is spaced from the upper conical portion by a first distance. Each of the blades is connected to the upper conical portion and the lower conical portion, and the blades are arranged in a spiral shape. The rotating element rotates the hollow tube, the hollow dish-shaped element and the blades. The blades strike the water to suck the air through an air intake hole of the inlet end into the hollow dish-shaped element, thereby injecting the air into the water under negative pressure.本新型係一種增氧機,用以將一空氣融入水中,其包含中空導管、中空碟形件、複數葉片以及轉動件。中空導管包含進氣端與出氣端,進氣端設有進氣孔。中空碟形件包含上碟形部與下碟形部,上碟形部連接出氣端,上碟形部與下碟形部之間具有一間距。各葉片定位於間距內且被上碟形部與下碟形部連動,且葉片呈旋渦狀排列。轉動件轉動中空導管並連動旋轉中空碟形件與葉片,葉片撥動水流使空氣透過進氣孔負壓吸入中空碟形件而注入水中。藉此,其利用白努利原理將空氣注入水中,不但大幅增加液氣之混合效率,更達到良好且充份的水流循環。100‧‧‧增氧機200‧‧‧中空導管210‧‧‧進氣端212‧‧‧進氣孔220‧‧‧出氣端222‧‧‧出氣孔600‧‧‧中空環架610、620‧‧‧中空環板700‧‧‧水上組件710‧‧‧空氣過濾件720‧‧‧加熱件730‧‧‧冷卻件300‧‧‧中空碟形件310‧‧‧上碟形部312‧‧‧通氣孔320‧‧‧下碟形部400‧‧‧葉片500‧‧‧轉動件510‧‧‧馬達520‧‧‧傳動齒輪530‧‧‧長管齒輪740‧‧‧遮雨蓋750‧‧‧固定環架752、762‧‧‧軸承760‧‧‧浮台D‧‧‧間距T‧‧‧間隔
