Patent ID: 7643284

Claim:
A portable computer having: a main processor; a heat sink comprising an air inflow portion and an air outflow portion thermally coupled with the main processor; a cooling fan device which sends air from a cooling fan device inlet portion to the air inflow portion in the heat sink; a housing with a housing surface comprising a housing bottom surface in which an inlet opening, through which outside air taken in by the cooling fan devices passes, is formed directly below the heat sink and a housing side surface in which an exhaust opening communicating with the air outflow portion in the heat sink is formed; and a guide plate which is formed between the heat sink and the housing bottom surface with a gap between the guide plate and the housing bottom surface, the guide plate covering the inlet opening and comprising a cooling surface extending from the housing surface over the inlet opening to the cooling fan device inlet portion and straightening vanes extending from the cooling surface to the housing bottom surface, the cooling surface absorbing heat radiated from the heat sink and diffusing the absorbed heat into air flowing from the inlet opening to the cooling fan device inlet portion.