| 摘要 |
PROBLEM TO BE SOLVED: To detect a lifetime of a cooling fan.SOLUTION: A lifetime detection device 1 comprises a temperature sensors 5 for measuring temperature in the vicinity of heat generation components 3 and a control unit 6 for detecting lifetime of cooling fans 4 which cool the heat generation components 3 on the basis of values measured by the temperature sensors 5. The temperature sensors 5 are provided at the respective heat generation components 3 so as to match relative positions with respect to the heat generation components 3 of the same kinds used for the same purpose. On the basis of the values measured by the temperature sensors 5, the control unit 6 calculates a temperature difference between respective measurement points A to C and determines that, if any temperature difference between the measurement points A to C exceeds a predetermined threshold, the cooling fan 4 which cools a heat generation component 3 having a high measured temperature has come to the end of its lifetime. |
