| 摘要 |
PURPOSE:To enable to manage with a main body and a duct, by a method wherein a changeover damper is provided on a partition part between a charge duct and an exhaust duct, an external suction opening and an external discharge opening are reversed so that an air flow of a centrifugal blower is made to reverse, in a titled ventilator for the duct. CONSTITUTION:When a centrifugal fan 7 is rotated by a motor 8 by turning a damper 9 into an illustrated state air is discharged to an external discharge opening part 4 from a duct 12 of an external suction opening part 2 of a charge duct 3 through the charge duct 3, a blower 6 and an exhaust duct 5 as per an arrow A-A'. When a changeover damper 6 is placed at a position shown by a dotted line by turning it by 90 degrees air inhaled through the external discharge part 4 of the exhaust duct 5 as per an arrow B-B' shown by a dotted line is discharged from the external suction opening part 2 of the charge duct 3. With this constitution, an air flow direction can be reversed by a main body and a duct. |
