| 摘要 |
<p>An air freshening device comprises a housing defining a chamber. The chamber contains air and a supply of fragrance material that scents the air inside the chamber. A mechanical oscillator is in fluid communication with the air in the chamber and is configured to transmit acoustic waves in the chamber. A narrow conduit provides a passage from an interior of the chamber to the atmosphere outside the chamber. The conduit is dimensionally configured such that a synthetic jet from the narrow conduit is generated upon activation of the mechanical oscillator, the synthetic jet ejecting scented air from the chamber interior to the atmosphere outside the chamber. The mechanical oscillator may be driven intermittently, resulting in a consistent intensity and character of the emitted scent over the life of the product.</p> |
