| 摘要 |
A ceiling-mounted air diffuser apparatus in which a annular discharge opening is effectively defined at a location between an effective inner margin of a drop-ceiling-supporting framework and surrounding ceiling panels and an inwardly spacedly adjacent outer margin of an intermediate, generally similarly shaped but smaller, ceiling panel positioned in a symmetrically centered location within the large vertical ceiling opening. An enclosing upper hood forming a diffuser provided with a source of air under pressure directed against the upper side of the diffuser panel and outwardly toward a downwardly and outwardly inclined, effectively diverging, air-flow-smoothing channel lying within the air plenum chamber and communicating at its bottom, output end with the annular discharge opening, and being so positioned and so directed and having a bottom appearance, relative to the corresponding diffuser panel outer margin spaced therebelow, such as to be substantially, effectively invisible from below and, consequently, greatly reducing the saliency of the annular discharge opening, while minimizing non-productive energy losses in the nearly horizontally discharged air.
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