Network communication device

• Main Authors: Shimada, Satoshi, Sawa, Manabu, Sasaki, Tooru, Kameno, Shuuji
• Format: Patent
• Language: English; French; German
• Published: 21.10.2020
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS

Cooling efficiency with simple configurations is enhanced when adopting the configuration of a front-back air supply and exhaust system as below. A first circuit board unit 120 is located in a horizontal direction in front of a relay circuit board 150 and a cooling unit 140 and a second circuit board unit 130 are placed side by side behind the relay circuit board 150 in a chassis 110 with the relay circuit board 150 placed between the first circuit board unit 120 and the cooling unit 140 and second circuit board unit 130; electric power is supplied from a power supply unit 180 via the relay circuit board 150 to each unit; a first air passage for allowing intake air introduced through an intake hole in a front side of the first circuit board unit 120 to pass through the first circuit board unit 120 and then introducing it through an opening in the relay circuit board 150 to the cooling unit 140 is formed in the chassis 110; a second air passage for allowing intake air introduced through an intake hole in a front face of the chassis 110 to pass through a lateral side of the first circuit board unit 120 and then introducing it through a vent hole in a partition provided at the lateral side of the first circuit board unit 120 to the cooling unit 140 is formed; and the second circuit board 130 is placed in the second air passage.