| 摘要 |
A swirl diffuser comprises radial vanes 4 pivoted about radially extending axes, 31, 36 in order to control the direction in which air may flow from outlet 6. A control device 10 for pivotting the vanes 4 includes a circular plate 12. Pivot arms 16, one for each vane 4, are pivotally mounted to the plate 12 and to levers 14 fixed to respective vanes 4. A paraffin wax cylinder (not shown) within a support sleeve 15 is connected to a ram 17 which is fixed to the plate 12. The wax cylinder expands and contracts in the axial direction, in dependence upon the temperature of air flowing through the diffuser. Hot air is directed downwardly into a room, and cool air is directed across the ceiling of the room. <IMAGE> |
