| 摘要 |
A ventilation device (9) includes an outer housing (8) which is fastened to a wall (10) and has an air intake (11) and an air outlet (12) on the side turned outwards from the room. A grate (18) which is detachably fastened to the side of the outer housing turned inwards to the room, has an intake opening (20) and an output opening (21), which forms draw passages (19) connected to the air intake (11) and the air outlet (12). An intake/output blower (14) which is installed in the drawpassages, is equipped with several sensors (23, 24, 25) on the grate, and a display section projects measurement signals and a warning display section projects in correspondence with the output signals from the calculation circuit. The intake/output blower (14) automatically works together with the warning display section.<IMAGE> |
