| 摘要 |
PROBLEM TO BE SOLVED: To reduce hot air in a case through a ventilation hole without deteriorating an appearance by the exposed hole, and prevent dust from entering the case through the ventilation hole. SOLUTION: A distribution board unit is stored in a case 1, and an operational part thereof is located at the front face of the case 1. A door body is opened and closed for covering the front part of the case 1. The front part of the case 1 covered by the door body has ventilation holes 15 and 20 that join the inside and outside thereof. The hot air heated from each apparatus of the distribution board unit is taken outside through the ventilation holes 15 and 20. When the door body is closed, these ventilation holes 15 and 20 are covered by the door body. |
