| 摘要 |
An air filter assembly includes a perimeter frame supporting an air filtering medium. The perimeter frame defines a cavity holding scented material, and defines apertures that face the air filtering medium, but that are not directly subject to flow-through of air. A cover or tape is adjustable to selectively partially uncover the apertures, thus providing control of the scenting process. By this arrangement, air is scented but the scented material is longer-lasting since it is drawn out of the cavity rather than being blown out or evaporated by high flow of air. Further, the scenting process is controllable by selectively removing the cover or tape, or by selectively positioning of the cover. In some versions, the scented material is replaceable. In another version, the arrangement is attachable to a conventional filter assembly.
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