| 摘要 |
<p>A fan assembly 200, for generating an air flow within a room, includes an annular casing which defines an interior passage 202. The interior passage includes an air inlet 204, and houses, downstream from the air inlet, an impeller 22 and a motor 26 for driving the impeller to draw an air flow through the air inlet and into the fan assembly. The interior passage also has an air outlet 206 from which at least a portion of the air flow is emitted from the fan assembly. The annular casing defines a bore 222 about which the interior passage extends and through which a secondary air flow from outside the fan assembly is drawn by the air emitted from the air outlet. An outlet section 208, containing the outlet 206, may have a cross section which varies continuously about the bore.</p> |
