| 摘要 |
<p>A cab for agricultural tractors or harvesters, earth-moving machines of the like is provided with a system for diffused ventilation of air within the cab, including four air ducts (17, 18) which extend parallel and adjacent to four uprights (7, 8) of the supporting frame (3) of the cab. Each of these ducts guides the ventilation air up to an outflow vent (17A, 18A) comprising a duct portion which can be oriented around an axis substantially coincident with the axis of the duct and having an outflow aperture (17B, 18B) substantially elongated along a vertical direction. The vents (17A, 18A) can be oriented towards one of the window pane which are adjacent thereto, for instance for demisting of the window pane, or towards the centre of the cab, for obtaining maximum ventilation during thermal transient periods, or the four vents can be all oriented according to a clockwise or anti-clockwise arrangement, to provide a diffused and homogeneous circulation of air during stationary thermal condition, so as to generate a sort of bubble of circulating air which surrounds the operator. Preferably the vents are provided with louvers which can be oriented upwardly or downwardly.</p> |
