公开(公告)号：EP2604941A4

公开(公告)日：2018-03-21

申请号：EP11816416

申请日：2011-08-09

Applicant: HITACHI LTD

Inventor： KASHIRAJIMA YASUHIRO ,  ITO JUNICHI ,  YOSHIDA TOMOHIRO ,  SENDA MASAKATSU ,  MIKAMI TERUO ,  SAWAMOTO HIDEO ,  IDEI AKIO ,  KOYANO KOICHI

IPC: H05K7/20 ,  F24F7/06 ,  F25B5/00 ,  F25B49/00 ,  F25B49/02 ,  G06F1/20

CPC classification number: G06F1/20 ,  F24F11/77 ,  F24F2221/40 ,  F25B5/00 ,  F25B49/00 ,  F25B2600/112 ,  F25B2600/2513 ,  F25B2700/197 ,  F25B2700/2117 ,  F25B2700/21171 ,  G06F2200/201 ,  H05K7/20827 ,  Y02B30/743 ,  Y02B30/746

Abstract: Provided is an apparatus for operating a cooling system in an abnormal state, and the cooling system includes plurality of evaporators that suck warm air exhausted from a plurality of electronic equipments installed in an equipment room with fans, cool the warm air through heat exchange with a refrigerant flowing in each cooling coil, and supply cool air into the equipment room; and a condenser disposed at a position higher than the plurality of evaporators, so as to cool the refrigerant circulated naturally between the condenser and each evaporator. The cooling system adjusts a supplied air temperature of air supplied from each evaporator by adjusting an opening degree of each flow regulating valve that adjusts a flow rate of the refrigerant flowing in each cooling coil. The apparatus includes deviation information detecting means for sequentially detecting deviation information between an maximum cooling capacity and a current cooling capacity in operation for each of the plurality of evaporators; and fan controlling means for reducing or stopping a rotational frequency of a fan for an evaporator which has deviation information exceeding a predefined abnormal determining threshold value among the plurality of evaporators.