| 摘要 |
The external air part is arranged on the window, which has at least two panes, on the outer window arch lower part. The through passage part (5,6,9) for heating the external air comprises partly the intermediate space between the window surfaces (9), partly a gap between the window arches and an opening in the inner window arch (4) upper part in which the indoor part (1,2,3) is arranged. The indoor part comprises partly a spreader part (1) which diffuses the heated air into the room and has a diffusion surface (3) which increases with the distance from the spreader. This surface can be wholly or partly convex, concave or similar and preferably has the shape of a semi-cylindrical body, a hemi-spherical body, a V-shaped body or a quadratic body. The spreader surface is provided with air holes or slots. |
