US 9,811,129 B2
Method of controlling air conditioning, air-conditioning control system and air-conditioning control apparatus
Hiroki Kobayashi, Kawasaki (JP); Yuichi Sato, Yamato (JP); and Sachio Kobayashi, Sagamihara (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by Hiroki Kobayashi, Kawasaki (JP); Yuichi Sato, Yamato (JP); and Sachio Kobayashi, Sagamihara (JP)
Filed on Jul. 31, 2012, as Appl. No. 13/562,732.
Claims priority of application No. 2011-177945 (JP), filed on Aug. 16, 2011.
Prior Publication US 2013/0042639 A1, Feb. 21, 2013
Int. Cl. F25D 17/04 (2006.01); G06F 1/20 (2006.01); H05K 7/20 (2006.01)
CPC G06F 1/206 (2013.01) [H05K 7/20836 (2013.01); Y02B 60/1275 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A control method for cooling a plurality of servers disposed in a data center that has a cold aisle and a hot aisle, an airflow from the cold aisle to the hot aisle being conducted through the plurality of servers, the control method comprising:
counting, by an air-conditioning control apparatus to control an air conditioner configured to supply cold air to the cold aisle and suck hot air out of the hot aisle, a number of operating servers that are in operation among the plurality of servers disposed in the data center;
generating an air flow from the cold aisle to the hot aisle by controlling the air conditioner in a first mode in which a pressure of the cold aisle is set higher than a pressure of the hot aisle by a predetermined pressure difference, when the acquired number of the operating servers that are in operation among the plurality of servers disposed in the data center is equal to or more than a predetermined threshold;
controlling the air conditioner in a second mode in which the pressure of the cold aisle is set equal to the pressure of the hot aisle, when the counted number of the operating servers that are in operation among the plurality of servers disposed in the data center is less than the predetermined threshold;
notifying the operating servers whether a current mode of the air conditioner is the first mode or the second mode; and
generating, by the operating servers, the air flow from the cold aisle to the hot aisle by driving a fan in each of the operating servers, when a notification that the current mode is the second mode is received from the air-conditioning control apparatus.