| 摘要 |
An air passage device, in particular a filter fan or outlet filter for installation in a mounting opening in a wall or in a housing of a switch cabinet, which is essentially formed by a ventilation grating and a main housing, and a filter mat is insertable between the ventilation grating and the main housing, the ventilation grating being situated on the main housing using an articulated connection, the ventilation grating having joint pins to form the articulated connection, which may each be guided in joint pin guide structures introduced into the main housing, the joint pin guide structures each connecting at least one closure position, one folded-out catch position, and one removal position to one another. An air passage device is thus provided which, based on a simple construction, allows high flexibility in regard to the operation of the ventilation grating and the filter mat.
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