Patent ID: 8442390

Claim:
An air freshener for generation of aerosolized liquid fragrance material comprising: a capillary passage having an inlet and an outlet; a liquid supply operable to supply liquid fragrance material to the inlet of the capillary passage only via capillary action along a supply path of capillary action, said supply path essentially free of heating; and a power supply adapted to apply voltage across a heater arranged along a heated portion of the capillary passage to heat liquid fragrance material in the capillary passage to a temperature sufficient to at least partially volatilize liquid fragrance material in the capillary passage such that the liquid fragrance material is driven out of the outlet of the capillary passage and forms aerosolized liquid fragrance material; wherein the capillary passage comprises an interior of a tube and the capillary passage includes a constriction at a location adjacent the inlet of the capillary tube, which reduces a cross-sectional of the capillary passage at said location by up to 75%.