| 摘要 |
A controllable air freshener unit in which a bottle filled with a volatile liquid fragrance is covered by a cap having vent holes therein that are covered by an absorbent membrane formed of microporous material disposed on the underside of the cap. When the bottle is placed in an upright position, the level of liquid is more or less below the cap and the membrane then acts as a barrier to prevent the discharge of fragrance vapor from the vented cap, the unit then being in its switched "off" state. When the bottle is placed in an inverted position raised above a supporting surface to expose the vented cap, the liquid then rests on the membrane and impregnates the pores thereof whereby a fragrance vapor is then wafted into the atmosphere and the unit is in its switched "on" state.
|
