Fujitsu Corporation

Motohiro Takemae

Haruhiko Yamamoto

Hisashi Kawashima

Shinichi Kobayashi

Fuminobu Iwasaki

Hideo Katsumi

Tsuguo Okada

Takaaki Kanki

Hirofumi Takao

A blower fan unit includes a housing, an impeller, an outlet, and a positioning mechanism. The impeller is mounted in the housing. The impeller rotates around a rotation center axis and generates an air current in a centrifugal direction from the rotation center axis. An outlet is formed in the housing and located in a centrifugal direction from the rotation center axis. A positioning mechanism is connected to the housing and makes the position of the housing change along the rotation center axis at each angular position around the rotation center axis.

Blower fan unit

A conductive roller is arranged so as to project from an opening of an upper surface of a circuit board unit removably accommodated in a rack. An opening of the rack is covered by a conductive thin plate. When the circuit board unit is accommodated in the rack, the roller fits in the opening of the rack and pushes the conductive thin plate. Thus, the circuit board unit and the rack are brought into electrical contact to perform electromagnetic shielding.

Electronic device with a structure preventing a electromagnetic wave leak

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.

Reservior tank for a liquid cooling system

Cooling method control system for electronic apparatus

Growing community of inventors

Kawasaki, Japan

Motohiro Takemae