| 摘要 |
PROBLEM TO BE SOLVED: To provide a device casing which prevents the mix of outside air and dust when a door is opened/closed and prevents the deterioration of an inner packaged article. SOLUTION: The casing is provided with a board door 61 which is fitted to the casing 1 and is opened/closed, a board door opening/closing detection means 31 detecting whether the board door 61 is opened or closed, an outside air flow-in preventing means 32 preventing outside air from flowing into a board and a fan rotary direction control means 33 which controls the rotary direction of a fan 12 that is provided in the board and circulates air in the board. The rotary direction of the fan 12 and the opening/closing of an opening/ closing-type intake port 16 are controlled in accordance with the opening/closing of the board door. |
