Patent ID: 7641546

Claim:
An apparatus for cooling a system in which a heat source generating heat is arranged, comprising: at least one air stream forming unit which cools the heat source to a certain temperature; a sensing unit which includes a supplied-air temperature sensor for sensing a temperature of air supplied into the system, and a discharged-air temperature sensor for sensing a temperature of air discharged out of the system; an altitude detecting unit which detects an altitude of the system, based on the sensed supplied-air temperature and the sensed discharged-air temperature; and a cooling controller which controls the air stream forming unit, based on the detected altitude, wherein the altitude detecting unit comprises: a supplied-air temperature detector which detects the supplied-air temperature sensed by the supplied-air temperature sensor; a discharged-air temperature detector which detects the discharged-air temperature sensed by the discharged-air temperature sensor; a temperature difference calculator which calculates the difference between the detected supplied-air temperature and the detected discharged-air temperature; a supplied-air temperature decrease detector which detects a decrease in the detected supplied-air temperature; and an altitude determiner which compares the calculated temperature difference with a reference value predetermined for determination of the altitude.