| 摘要 |
<p>The invention relates to a static-type air extractor comprising a lower part (4) and an upper part (5) which are placed opposite each other and are spaced apart from each other yet coupled to each other with the aid of support elements forming cross-members (6) which define a free area (7) which is opened, forming venturi, communicating with an opening (8) made in the lower part (4), wherein the upper part (5) is defined by an outer surface (17) of a partition (18) forming an annular collar (19) and a center area (20) which is generally cone-shaped or truncated and whose inclined surfaces (23) form a first slope (p1) and whose large base (21) is oriented towards the collar (19) and whose small base (21) is axially offset towards the top in relation to the collar (19), the center part (20) of the upper part (5) being connected to the annular collar (19) by a connecting partition (24) which is generally truncated and whose inclined surfaces (25) form a second slope (p2) which is smaller than the first slope (p1),wherein the air extractor (1) is devoid of drive means such as turbines and similar, in the free area. The invention also relates to a ventilation system comprising one such extractor (1).</p> |
