Inhaler with ultrasonic wave nebuliser having nozzle openings superposed on peaks of a standing wave pattern

摘要

The liquid droplet spray device (5) comprises a housing formed of a superposition of a first substrate (5) and a second substrate (6) and a space (2) within the housing for containing a liquid substance (3), vibrating means (8) for applying a frequency vibration to the liquid substance (3) thereby generating said liquid droplet spray, and outlet means (7, 9, 10) for ejecting the liquid droplet spray. The outlet means comprise a cavity (7), output nozzles (9) and output channels (10) connecting the cavity (7) to the outlet nozzles (9), According to the invention, the vibrating means (8) creates a standing wave pattern within the liquid substance (3), and the outlet means are arranged such that said outlet nozzles (9) are superposed on the vibration mode peaks of the standing wave pattern. A minimal retention and an optimal flow of the substance is thus obtained.