OXYGEN DELIVERY APPARATUS AND MANUFACTURING METHOD THEREFOR, AND DE LAVAL NOZZLE AND MANUFACTURING METHOD THEREFOR

摘要

A de Laval nozzle, comprising: a first tube (410), the first tube (410) comprising a first air inlet tube (412) and a plurality of second air outlet tubes (413a-413d), the lower surface of the first air inlet tube (412) being provided with a plurality of air outlet holes (412a-412d), and each of the air outlet holes (412a-412d) being connected to one of the second air outlet tubes (413a-413d); a second tube (420) sleeved on the periphery of the first tube (410), the lower end of the second tube (420) being connected onto the outer wall of the first tube (410); and a third tube (430) sleeved on the periphery of the second tube (420), the lower end of the third tube (430) being connected onto the outer walls of the plurality of second air outlet tubes (413a-413d). The de Laval nozzle further comprises a plurality of guide sheets (440a-440d, 450a-450d, 460a-460d). According to the de Laval nozzle, the design of a cooling water channel is optimized, and thus higher cooling efficiency is achieved. An oxygen delivery apparatus, comprising the de Laval nozzle. A manufacturing method for a de Laval nozzle, in which a de Laval nozzle is manufactured by using the additive manufacturing technology.