Patent ID: 8147747

Claim:
A swirling column nozzle, comprising: a nozzle body with an air chamber defined therein and an outlet portion connected to a lower end of the nozzle body, wherein the outlet portion is of a hollow cylinder shape and has an outer surface and an inner surface; a feed pipe penetrating through the air chamber and extending to the outlet portion for supplying concentrate; an oxygen supplying portion disposed on the nozzle body for supplying oxygen into the air chamber; and a plurality of guide ribs formed on the inner surface of the outlet portion, and each of the plurality of guide ribs has a predetermined inclination angle with respect to the inner surface of the outlet portion along a longitudinal direction, such that when a mixture of the oxygen and the concentrate moves downwardly, the mixture of the oxygen and the concentrate will be guided by the plurality of guide ribs in the predetermined inclination angle with respect to the central axis of the outlet portion and thus be in a substantially swirling column form.