| 摘要 |
PROBLEM TO BE SOLVED: To allow air to flow in a case with fixed conditions, and to effectively perform heat countermeasures with the minimum power consumption by forming a ventilation hole onto a plurality of printed-circuit boards, and by connecting section space parts being formed by the adjacent printed-circuit broads with the ventilation hole. SOLUTION: At the inside of a case 1, printed-circuit broads 2, 3, 4, and 5 are accommodated in a vertical row while being separated with specific width. In the case 1, among the printed-circuit broads 1, 2, 3, 4, and 5, section space parts 6, 7, 8, and 9 are formed. Also, on the printed-circuit boards 1, 2, 3, 4, and 5, ventilation holes 10, 11, 12, and 13 are formed while they oppose one another. Furthermore, a fan 14 of exhaust is installed on one side wall 1a of the opposing side-wall parts 1a and 1b of the case 1 while the fan 14 opposes the ventilation holes 10, 11, 12, and 13, and a suction hole 15 composed by a plurality of grooves is formed on the other side wall 1b.
|
