Nec Corporation

Showa Denko K.k.

Kazuhiro Kumakura

Sakae Kitajo

Mitsuru Yamamoto

Tomotaka Ishida

Kazuo Taga

An electronic device cooling apparatus including a cooling device including a heat conductive plate formed with a flow path, a circulating pump, a liquid storage tank upper chamber and lower chamber provided on the upper and lower side of the heat conductive plate, and a bypass provided with the heat conductive plate so as to allow the cooling medium to pass through the liquid storage tank upper chamber and the liquid storage tank lower chamber.

Electronic device cooling apparatus

A liquid-cooled heat radiatorincludes a heat radiation basehaving a cooling-liquid channel, and an expansion tankprovided on the heat radiation base. The expansion tankhas a tank bodyhaving an expanded portion, which expands upward and opens downward, and a bottom platejoined to the lower end of the tank bodyto thereby close a bottom opening of the expanded portion. A through-holeis formed in the top wall of the expanded portionof the tank bodyand serves as a communication section for establishing communication between the interior and the exterior of the cooling-liquid channel. A hydrogen-permeable memberis fixedly fitted into the through-holeso as to stop the through-hole. The hydrogen-permeable membersatisfies the relation B&#x2267;50 A, where A and B are water-vapor permeability and hydrogen permeability, respectively, of the hydrogen-permeable member. The hydrogen-permeable memberis formed from a single material selected from the group consisting of ethylene-propylene rubber, butyl rubber, fluorine-containing rubber, nitrile-butadiene rubber, and silicone rubber. The liquid-cooled heat radiatorcan be free from an increase in pressure in the cooling-liquid channel

Growing community of inventors

Oyama, Japan

Kazuhiro Kumakura