442 電光掲示板内電子機器の冷却に関する実験的研究

概要

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The efficient cooling on semi-conductors of the electronic devices has been becoming important in recently developed computer industry. This paper describes the cooling problem on heat generating semi-conductor components (DC source) in electronic-luminescence board (LED) used as the destination indicator in JR station, to make a level up of the reliability and durability of the devices. The cooling approaches employed here are involved the natural/forced convection of air in the opened duct covering with the radiator fins enclosed in the board, backside of which is the DC sources. Particularly, fan motor on-off control cooling system is introduced depending on the temperature of the bimetal sensing. Cooling characteristics of the heat generating DC source semiconductor device by the present approaches are cleared.
2002-07-09