| 摘要 |
<p>An air freshener unit (10;60) comprises a container (14;70), a disc-shaped cartridge (15;71) of air freshening material rotatably mounted within the container for rotation about a substantially horizontal axis, and a discharge outlet (20;72) in the wall of the container allowing air freshening vapour to be dispensed. The container has baffle means (13;73) adapted to allow a faster rate of evaporation of the air freshening material in one part (25;86) of the cartridge relative to the remainder of the cartridge, said one part being at least partially offset with respect to a vertical line through the axis of rotation, whereby the quicker rate of evaporation in the offset part will by itself cause the centre of gravity to self-rotate within the container. The invention also provides a disc-shaped cartridge (15;71) of air freshening material for the air freshener unit. The cartridge comprises a holder having a hub portion (27;74) for rotatably mounting the cartridge in the container (14;70) and holding means (26;46;83,84)for supporting air freshening material in block form uniformly around the hub portion. The hub portion has oppositely directed stub shafts (28,29;75,76)for location in apertures in opposed walls of the container, the apertures allowing the cartridge to rotate. The invention further provides a method of discharging different air freshening vapours from the same air freshening unit. <IMAGE></p> |
