| 摘要 |
The device consists of an inlet box (10), fed by a flow of air (F1) and fitted with central (14) and two lateral (16) outlets, controlled, respectively, by central (18) and two lateral (20) butterfly flap valves. The valves rotate around the axis (XX), between a primary position, in which the central outlet is closed and the side outlets open and a secondary reversed position. At least one of the valves is fitted with a deflector wall (32, 38), to direct the flow of air towards the open valves.
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