Fujitsu Corporation

Takaaki Kanki

Hisashi Kawashima

Motohiro Takemae

Hideo Katsumi

Hirofumi Takao

A reservoir tank of the present invention employed in a liquid cooling system is provided with a plurality of outlets for feeding out the coolant and a plurality of inlets to which the coolant returns after cooling electronics devices. These outlets are provided at the center of bottom of the tank and these inlets are provided at the external circumference of the outlets. Incident angle of the inlets to the tank is inclined from the vertical line of tank so that the coolant generates a whirlpool around the vertical axis of tank. A cylindrical partition may be provided between the center of the bottom having the inlets and the circumferential part having the outlets, so as to prevent a short path of the coolant flowing from inlets to the outlets. In this case, holes may be provided at the partition so that the coolant stirred at the outside of partition flows to the outlets therethrough. In such a structure, the coolant is sufficiently stirred in the tank even if temperature of coolant returning to the tank is different on each inlet. Thereby, temperature of coolant fed out from the outlets is kept at a uniform temperature; therefore, uniform cooling of the electronic devices can be realized.

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Oyama, Japan

Takaaki Kanki