Patent ID: 7751190

Claim:
An electronic device comprising: a cabinet; a first heat generating member and a second heat generating member in the cabinet; a fan unit configured to cool down the first heat generating member and the second heat generating member; a first heat pipe comprising a first end portion thermally connected to the first heat generating member, a second end portion provided in a vicinity of the fan unit, a pipe-like first main body and a heat transfer fluid which changes its phase between gas and liquid contained in the first main body; a second heat pipe comprising one end portion thermally connected to the second heat generating member and an other end portion provided in a vicinity of the fan unit, a pipe-like second main body and a heat transfer fluid which changes its phase between gas and liquid contained in the second main body, wherein: the first end portion of the first heat pipe is located at a position lower than that of the second end portion and the one end portion of the second heat pipe is located at a position higher than that of the other end portion; the second heat pipe comprises a transport mechanism configured to convey the heat transfer fluid upward from the lower end portion to the higher end portion, the conveying mechanism comprises a porous layer provided on an inner circumferential portion of the second main body and the porous layer comprises a plurality of micro-pores connected to each other; and the first heat pipe comprises a plurality of groove portions inside the first main body and the plurality of groove portions configured to extend along a longitudinal direction of the first heat pipe.