| 摘要 |
A ventilation system for an air or gaseous fluid has a housing having an inlet (50) and an outlet (52), an axial fan (16) and an accelerating/deflecting structure (18). The axial fan has a casing (36) attached to the housing. Moreover, the axial fan (16) has a motor mounted within the casing and blades (32) also mounted within the casing to generate a flow of said fluid in an axial direction. The accelerating/deflecting structure (18) is devised and positioned to orient the flow generated by the axial fan (16) in a direction transverse to said axial direction. The accelerating/deflecting structure (18) can either be mounted upstream or downstream of the axial fan (16). Furthermore, the accelerating/deflecting structure (18) can either be mounted within or outside the housing.
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