Patent ID: 8020613

Claim:
A heat transfer controlling mechanism comprising: a vaporizing portion; a condensing portion; a loop-shaped flow path connecting the vaporizing portion and the condensing portion such that a working fluid is sealed therein; a gas passage suppressing portion provided on one side in the loop-shaped flow path, for allowing a liquid to pass therethrough and suppressing passage of a gas; and a liquid passage suppressing portion provided on another side in the loop-shaped flow path, for allowing a gas to pass therethrough and suppressing passage of a liquid, wherein the heat transfer controlling mechanism performs a heat transport by an action of vaporization of the working fluid in the vaporizing portion and by an action of condensation of the working fluid in the condensing portion to thereby control transfer of heat, and wherein at least one of the gas passage suppressing portion and the liquid passage suppressing portion comprises a wettability changing portion comprising a material whose contact angle is changed at a predetermined temperature.