| 摘要 |
A ventilation device (30) is provided with a box-shaped frame (5), a centrifugal blower (9), and a decorative panel (20). The decorative panel (20) is provided with a panel suction port (21) in the central section thereof and a panel discharge port (22) in the peripheral edge section thereof. The blower (9) is arranged within the frame (5) and comprises a casing (11) and centrifugal blower blades (10) that are arranged within the casing (11). The casing (11) has a scroll shape and comprises, in the lower surface thereof, a blower suction port (15) that communicates with the panel suction port (21). The side wall (13) of the casing (11) comprises: a first circulation port (18) in an area on the downstream side in the direction of rotation of the centrifugal blower blades (10) on the side opposite from a blower discharge port (14); and a second circulation port (19) in an area that does not overlap with the first circulation port (18) in a planar view. The first circulation port (18) and the second circulation port (19) each communicate with the panel discharge port (22). |
