Patent ID: 8081460

Claim:
A liquid-cooled heat radiator comprising a heat radiation base having a cooling-liquid channel, wherein the heat radiation base has a communication section for establishing communication between the interior and the exterior of the cooling-liquid channel, and a hydrogen-permeable member is disposed in the communication section; and wherein an expansion tank is provided on the heat radiation base; the expansion tank has a tank body having an expanded portion, which expands upward and opens downward, and a bottom plate joined to a lower end of the tank body to thereby close a bottom opening of the expanded portion, and joined to an upper surface of the heat radiation base; the heat radiation base and the bottom plate have respective communication holes formed therein for establishing communication between the cooling-liquid channel and the interior of the tank body; the communication section is a through-hole formed in a top wall of the expanded portion of the tank body; and the hydrogen-permeable member is fixedly fitted into the through-hole so as to stop the through-hole.