| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator of an electric equipment box that exhibits high-level cutoff operation even in a rainstorm or the like to prevent rainwater from entering and also accurately ventilates while the entire ventilator is made compact.SOLUTION: A ventilator of an electric equipment box includes: a base frame 1 fixed to a fitting opening 6; and a first louver 2 covering the outer surface of the base frame 1; a second louver 3; and a third louver 4. First louver walls 21 which are open downward are formed in stages on the outer surface of the first louver 2. The second louver 3 and third louver 4 have second louver walls 31 and third louver walls 41 formed in stages correspondingly to the first louver walls 21. The flow line R of ventilation air in a ventilation passage 23 extending from the entrance 24 of the first louver 2 to the exit 25 of the third louver 4 is formed in a wave shape including a first direction change portion C1 which directs downward and guides the ventilation air, a second direction change portion C2 which directs upward and guides the ventilation air, and a third direction change portion C3 which directs inward and guide the ventilation air. |
