The temperature sensor detects a component temperature of an electronic component included in the ICT equipment. The declination index value calculation means calculates a declination index value indicating the degree of declination of the component temperature of the electronic component, based on the detection result of the temperature sensor. As a declination index value, a declination quantity of the component temperature per unit time or a difference between the highest value of the component temperature in a past certain period and the current component temperature may be used, for example. The control means controls the number of rotations of the cooling fan in accordance with the declination index value calculated by the declination index value calculation means. More specifically, the control means causes the number of rotations of the fan to be lower as the degree of declination of the component temperature indicated by the declination index value is larger.
1. ICT (information and Communication Technology) equipment having an electronic component, the ICT equipment comprising:
a cooling fan;
a first temperature sensor that detects a component temperature of the electronic component included in the ICT equipment;
a second temperature sensor that detects a temperature of an intake air; and
a microprocessor including:
a declination index value calculation unit that calculates an index value indicating a degree of declination of the component temperature of the electronic component based on a detection result of the first temperature sensor; and
a control unit that controls the number of rotations of the cooling fan based on the index value calculated by the declination index value calculation unit and the temperature of the intake air by the second temperature sensor.
2. The ICT equipment according to claim 1 , wherein
the index value is a declined temperature per unit time of the component temperature of the electronic component.
3. The ICT equipment according to claim 1 , wherein
the index value is an average value of declination rates of the component temperature of the electronic component in a plurality of measurement periods.
4. The ICT equipment according to claim 1 , wherein
the index value is a difference between a highest value of the component temperature of the electronic component in a past certain period and a current component temperature.
5. The ICT equipment according to claim 1 , wherein
the control unit controls the number of rotations of the cooling fan to be lower as the degree of declination of the component temperature of the electronic component, indicated by the index value calculated by the declination index value calculation unit, is larger.
6. The ICT equipment according to claim 1 , wherein
if the index value is not less than a predetermined threshold, the control unit stops the cooling fan.
7. A control device for ICT (Information and Communication technology) equipment having a cooling fan, electronic component, a first temperature sensor for detecting a temperature of the electronic component, and a second temperature sensor that detects a temperature of an intake air, the control device comprising:
a microprocessor including:
a declination index value calculation unit that calculates an index value indicating a degree of declination of a component temperature of the electronic component included in ICT equipment, based on a detection result of the first temperature sensor that detects the component temperature of the electronic component; and
a control unit that controls the number of rotations of a cooling fan based on the index value calculated by the declination index value calculation unit and the temperature of the intake air by the second temperature sensor.
8. A temperature controlling method comprising:
by a declination index value calculation unit, calculating an index value indicating a degree of declination of a component temperature of an electronic component included in ICT (Information and Communication Technology) equipment, based on a detection result of a first temperature sensor that detects the component temperature of the electronic component and a second temperature sensor that detects a temperature of an intake air; and
by a control unit, controlling the number of rotations of a cooling fan based on the index value calculated by the declination index value calculation unit and the temperature of the intake air by the second temperature sensor.