| 摘要 |
<p>A ventilation device (1) for the provision of ventilating air to a room comprises a main body structure (2, 3, 4, 5) adapted for location at the edge (4) of a door or window and having an internal air channel (6) whereby air can flow across said edge (4) from an external side (E) to an internal side (I) i.e. within the room. An airflow control serves to control airflow through the channel (6) and comprises a plate-form flap (8) pivotal on a hinge (9) on the body structure so as to be swingable between a closed position (A) and a maximum open position (B). Additionally the hinge (9) is so arranged that when the flap (8) is moved to a predetermined third position (C), specifically slightly away from the closed position (A), the flap (8) can be lifted away from the main body structure, thereby facilitating for example cleaning of the internals of the body structure. An external canopy (15) can be provided, and sound insulating material (17, 20) can be located internally on both the body structure and the canopy (15). <IMAGE></p> |
