| 摘要 |
<p>A method and a system of apparatus for local ventilation is described, in particular at a printing machine, where poisonous vapours or polluting gases are produced or appear, and wherein air is admitted at one side of the machine and wherein removal of poisonous vapours and polluted air takes place at the opposite side of the machine, in which the admission of air takes place in a directed and active way by means of one or more nozzles (14), and wherein the removal of poisonous vapours etc. takes place by means of one or more exhaust openings which are placed opposite the supply nozzles (14) - at a distance therefrom. The system of apparatus comprises an air supply duct (12), adapted for placement at the previously mentioned side of a printing machine (2), with a number of air supply nozzles (12), an air exhaust duct (22), adapted for placement at the opposite side of the machine (2), with a number or air exhaust openings, and ventilator means adapted for supplying, respectively exhausting air and wherein the air supply duct (12) extends along a side edge area of the machine (2), the air supply duct (12) comprising a large number of air supply nozzles (12) which are adapted for individual alignment of the direction of the air jet inward against and along the zone of the machine where poisonous vapours etc. appear, and towards the air exhaust duct (22).</p> |
