| 摘要 |
<p>Self-regulating ventilation unit (1) formed by a housing (2) with an outside wall (3) and an inside wall (4) that are connected by upright longitudinal walls (5-6) in the longitudinal direction of the housing (2) and which are connected together by two end walls (7-8), whereby the inside wall (4) and outside wall (3) contain a grid (11-12) and in which a band (13) is affixed that extends in the longitudinal direction over the grid (11) of the outside wall (3) and whose ends are secured to the outside wall (3) or the end walls (14), whereby somewhere between these ends the band (13) is pushed away in the direction of the inside wall (4) by means of an elastic element (15), whereby at least one of longitudinal wall (5-6) at least partially has an open structure (20).</p> |
