| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation device which prevents infiltration of rainwater and which can secure a larger amount of ventilation.SOLUTION: A ventilation device 1 includes a plurality of louver units 2 arranged side by side in a vertical direction and having an outer blade 3 and an inner blade 4. The outer blade 3 inclines so that a lower side is located on an indoor side, and has a perforated part 31 along the lower side and a shielding part 32 further on the upper side than the perforated part 31. The inner blade 4 inclines so that the lower side is located on an outdoor side, and has a perforated part 41 along the upper side and a shielding part 42 further on the lower side than the perforated part 41. Then, on a straight line L1 connecting an upper end part of the shielding part 32 of a louver unit 2B and an upper end part of the shielding part 42 of the louver unit 2B, the shielding part 42 of a louver unit 2A exists. Also, on a straight line L2 connecting the upper end part of the shielding part 32 of the louver unit 2B and the upper end part of the shielding part 42 of the louver unit 2A, the shielding part 32 of the louver unit 2A exists.SELECTED DRAWING: Figure 1 |
