| 摘要 |
A ventilator for a protection box of an opening and shutting device is provided to remove a condensation phenomenon efficiently by smoothing the air circulation of the protection box. A ventilator for a protection box(1) of an opening and shutting device includes a ventilation unit(12), a cover(13), and a height(14). The ventilation unit of which the inside is void is installed on a ventilation hole(2) of the protection box and plays a role of a passage when the air inside the protection box is discharged and the dry air outside the protection box is provided inside the protection box. The cover is installed on the ventilation unit and prevents foreign material such as dust from being penetrated inside the protection box through the ventilation unit. The height has a vent hole(15) and a foreign material inflow preventing projection(16). |
