| 摘要 |
<p>A portable computer is provided to prevent computer performance from getting lower owing to foreign material flown into a main frame by preventing the foreign material from flowing into the main frame through a heat discharging hole. A main frame casing forms an outer appearance of the main frame, receives heated parts(51), and forms the heat discharging hole. A cooling fan(62) discharges heat generated from the heated parts to the heat discharging hole. An opening/closing member(53) closes the heat discharging hole and closes the heat discharging hole at a specific temperature. A heat transmitter(70) transfers the heat generated from the heated parts to the opening/closing member. The opening/closing member includes shape memory alloy changing a shape at the specific temperature. A temperature sensor(61) detects the temperature of the heated parts. A controller(60) controls the cooling fan when the temperature which is detected in the temperature sensor reaches to the specific temperature of the opening/closing member.</p> |
