Patent ID: 8142027

Claim:
An electronic device comprising: an outer casing; an object disposed within the outer casing; an intake-side duct connected to an intake port defined in the outer casing; a cooling fan for cooling the object; an air-quantity measuring device disposed in the intake-side duct of the electronic device near an air filter, the air-quantity measuring device measuring a quantity of cooling air taken into the intake-side duct through the air filter; an ambient-temperature measuring device that measures an ambient temperature around the electronic device, the ambient-temperature measuring device being disposed in the intake-side duct or outside the outer casing; and a control unit configured to control the electronic device, comprising: an object-temperature calculating section configured to calculate: an increment in a temperature of the object from the air quantity measured by the air-quantity measuring device, and the temperature of the object by adding the ambient temperature measured by the ambient-temperature measuring device to the increment in the temperature of the object, and an operation control section configured to control the cooling fan according to the calculated temperature of the object.