| 摘要 |
PROBLEM TO BE SOLVED: To provide a network communication device for increasing cooling efficiency with simple constitutions when adopting a front and rear suction and exhaust type structure.SOLUTION: In a casing 110, a first circuit board unit 120 is horizontally arranged at a front part of a circuit board for relay, and a cooling unit 140 and a second circuit board unit 130 are arranged side by side at a rear part of the circuit board for relay with the circuit board 150 for relay in between, and power is supplied from a power supply unit 180 via the circuit board for relay to each unit. In the casing, a first air passage in which intake air introduced from an intake port at a front side of the first circuit board unit is made to pass through the first circuit board unit, and introduced through an opening of the circuit board for relay to the cooling unit is formed, and a second air passage in which the intake air introduced from the intake port of a front surface of the casing is made to pass through a side surface side of the first circuit board unit, and introduced through a vent hole of a partition disposed at the side surface side of the first circuit board unit to the cooling unit is formed, and a second circuit board is arranged.SELECTED DRAWING: Figure 1 |
