| 摘要 |
In roof window with a frame structure and an openable pane supporting sash structure, the top, bottom and side members (1-8) of the frame and sash structures are substantially made of wood profiles, which on the exterior sides are covered by covering members of the weather-shielding material. In respect of the top members (1, 5) the covering members comprise a hood-like covering cap (11) which is secured to the frame structure and covers the frame and sash top members (1, 5), and a ventilation passage (12) between an exterior opening (13) at a downwards facing edge member of said covering cap (12) and an interior opening (14) positioned at the interior side of the sash top member (5), said opening being in the closed position of the window closable by means of a ventilation flap (15) pivotally connected with the sash top member (5). To prevent convection current in the ventilation passage (12) and to obtain a ventilation with reduced loss of heat, the air flow area of the ventilation passage (12) is reduced to a substantially slit-shaped passage by means of an insert member (17). In this manner also an improved protection against intrusion is obtained. An additional insert member (18) may be connected with the interior side of the covering cap (12) to reduce the risk of condensation, when the ventilation flap is open. |
