Patent ID: 8266921

Claim:
A data center, comprising: an air-conditioned room; two rack rows formed on a floor surface of the air-conditioned room and each composed of a plurality of racks arranged in a horizontal direction, each of the plurality of racks housing electronic devices in multistage configuration; an air conditioner for conditioning air in the air-conditioned room to eliminate heat generated from the electronic devices housed in the plurality of racks, the air conditioner being provided in a room other than the air-conditioned room having the racks arranged therein, or outside of a building; a hot zone in the air-conditioned room, the hot zone being defined by the floor surface, the two rack rows arranged on the floor surface of the air-conditioned room such that rear sides thereof are opposite each other at a distance, a ceiling disposed above the two rack rows, two panels disposed at both ends of the two rack rows in the horizontal direction and extending from a lower end of the two rack rows to the ceiling, and two partitions disposed at a front top end of the two rack rows and extending to the ceiling; a plurality of exhaust ports for sucking and discharging air having a decreased density in the hot zone upward, the plurality of exhaust ports being disposed on the ceiling of the air- conditioned room on the hot zone to face to the two rack rows in the horizontal direction in a plan view; a plurality of outlet ports for blowing air-conditioned air having a density greater than the decreased density from the air conditioner vertically downward, the plurality of outlet ports being disposed on the ceiling on a front side of the two rack rows in the air-conditioned room except the hot zone to face to the two rack rows respectively in the horizontal direction in the plan view; an exhaust air duct connecting the air conditioner and the plurality of exhaust ports, the exhaust air duct being provided on a back side of the ceiling of the air-conditioned room to face to the two rack rows in the plan view; and an outlet duct connecting the air conditioner and the plurality of outlet ports, the outlet duct being provided on a back side of the ceiling of the air-conditioned room to face to the two rack rows in the plan view, wherein the exhaust air duct and the outlet duct comprise parts facing to the two rack rows in the plan view respectively, and the parts are linear and spaced from each other in the plan view, and wherein the air conditioner is operable to introduce the air-conditioned air, which has been blown from the plurality of outlet ports via the outlet duct to the air-conditioned room vertically downward, through front sides and then the rear sides of the two rack rows into the hot zone, and thereafter to introduce the air in the hot zone from the plurality of exhaust ports via the exhaust air duct into the air conditioner, thereby enhancing mobility of the air-conditioned air.