Fujitsu Corporation

Fuji Furukawa Engineering & Construction Co., Ltd

Fuji Electric Co., Ltd.

Tomoaki Haneda

Hideki Kimura

Yoichi Sato

Naoki Shinjo

Akihiro Yasuo

Katsuhiko Nakata

Mitsuo Hayashi

Hitoshi Nori

Yoshihiro Kusano

Yoshihisa Iwakiri

Kengo Ueda

Kenji Tosaka

Mika Tokumitsu

Kouji Kuroda

Junichi Ishimine

Yuji Ohba

Masamichi Iwasaki

Shinji Mizumura

Jun Takeda

An air conditioner sucks air exhausted from an information processor, and cools down the sucked air. The air conditioner exhausts the cooled air. The air conditioner acquires a cooling state, determines whether a cooling capacity exceeds an upper limit value, and reduces the volume of exhaust air when it is determined that the cooling capacity exceeds the upper limit value. For example, the air conditioner calculates a thermal load as the cooling state by using the volume of exhaust air, a difference between the temperature of exhaust air and the temperature of suction air, and determines that the cooling capacity exceeds the upper limit value when the calculated thermal load exceeds a given threshold. The air conditioner measures the temperature of exhaust air, and determines that the cooling capacity exceeds the upper limit value when the measured temperature exceeds a set value.

Air conditioning system

To cool a blade type server disposed in an air-conditioned room, the following arrangements are made. The first is at least one shell having a ventilation passage disposed in the air-conditioned room. The second is, the following are disposed in a ventilation passage: racks, in which blade type servers each composed of a case with slim boards housed therein are stacked; cooling coils each having a coolant passage and a cooling fin and cooling a passing air; and at least one fan unit having axial-flow fans placed therein and producing air currents in one direction. The third is the fan unit forces a cooling air to flow in one direction in the ventilation passage thereby to cool the servers in the racks. The cooling coils and racks are disposed alternately so that warmed cooling air after passing through the rack is cooled by the cooling coil and then cools the next rack.

Cooling system for information device

Growing community of inventors

Kawasaki, Japan

Tomoaki Haneda