Patent ID: 7855890

Claim:
A cooling system for an electronic device, comprising: a device room in which a plurality of electronic devices are placed; an evaporator which is provided close to each of the electronic devices, and cools exhaust air from the electronic device by vaporizing a refrigerant with heat generating from the electronic device; a cooling tower which is provided at a place higher than the evaporator, cools the refrigerant by outside air and water sprinkling, and condenses the vaporized refrigerant; a circulation line in which the refrigerant naturally circulates between the evaporator and the cooling tower; a heat exchanger which cools the refrigerant; a parallel line which is a flow path for the refrigerant, connected to the circulation line, and is provided so that the heat exchanger has parallel relation with respect to the cooling tower; and a parallel control mechanism which controls a refrigerant amount of the refrigerant which is fed to the parallel line from the circulation line.