Ventilation case for mechanically controlled ventilation installation, has friction lining provided on upper outlet aperture of ventilator in electric fan unit mounted on upper rails supported and guided by inclined lower rails

摘要

The case has an electric fan unit (14) disposed inside an enclosure (1) and mounted on upper rails (19) supported and guided by inclined lower rails (20). A friction lining (24) provided on an upper outlet aperture (23) of a ventilator (16) in the fan unit, is compressed when the fan unit is in utilization position and is freed when the fan unit is removed from utilization position for maintenance.