Electronic device
AssigneeKabushiki Kaisha Toshiba
InventorsHideo Kitamura, Kenji Hirohata, Katsumi Hisano, Tomonao Takamatsu
Life of this patent
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Abstract
An electronic device includes a deviation value calculation unit which calculates a deviation value from the normal boundary of the relationship between a power index associated with the driving power and the measured rotational speed of the fan, a clogging detection unit which detects, based on the deviation value, clogging in an air duct through which the fan takes in air outside the case and sends it to the radiator, and a deviation value correction unit which corrects the deviation value in accordance with aging of performance of the fan to compensate for deterioration of the clogging detection capability of the clogging detection unit caused by the aging.
Claims8
An electronic device comprising:
- a first radiator which dissipates heat transported from a first heat generating portion via a first heat transport unit;
- a first fan which rotates and sends air to the first radiator according to a first driving power;
- a first temperature measuring unit which measures a temperature of the first heat generating portion;
- a first adjustment unit which adjusts the first driving power in accordance with a driving condition corresponding to the temperature measured by the first temperature measuring unit;
- a first rotational speed measuring unit which measures a rotational speed of the first fan;
- a deviation value calculation unit which calculates a deviation value from a normal boundary of a relationship between a power index associated with the first driving power adjusted by the first adjustment unit and the rotational speed of the first fan measured by the first rotational speed measuring unit;
- a clogging detection unit which detects, based on the deviation value, clogging in an air duct through which the first fan takes in air outside a case and sends the air to the first radiator;
- and
- a deviation value correction unit which corrects the deviation value in accordance with aging of performance of the first fan to compensate for deterioration of a clogging detection capability of the clogging detection unit caused by the aging.
Dependencies are inferred from the claim text.