Electric device including an electric fan and a control unit for controlling the electric fan

摘要

An electric device has a casing with an air-inlet and an air-outlet, a main unit disposed inside the casing, a first temperature sensor for detecting the temperature inside the casing, a second temperature sensor for detecting the temperature outside the casing, an electric fan, and a control unit. The control unit rotates the electric fan at the time of the low-temperature startup such that the temperature detected by the first temperature sensor is lower than a preset first threshold value, while the temperature detected by the second temperature sensor is higher than the temperature detected by the first temperature sensor.

主权项

1. An electric device having a casing with an air-inlet and an air-outlet, and a central processing unit (CPU) disposed inside the casing, the electric device comprising:
a first temperature sensor for detecting the temperature inside the casing; a second temperature sensor for detecting the temperature outside the casing; an electric fan; and a control unit for rotating the electric fan at a time of a low-temperature startup in which the temperature detected by the first temperature sensor is lower than a preset first threshold value, and the temperature detected by the second temperature sensor is higher than the temperature detected by the first temperature sensor, wherein the electric fan, the CPU, and the air-outlet are arranged in the order of the electric fan, the CPU, and the air-outlet; wherein the second temperature sensor comprises a third temperature sensor installed at the air-inlet and a fourth temperature sensor installed at the air-outlet; and wherein the control unit selects the temperature sensor detecting a higher temperature at the time of the low-temperature startup between the third temperature sensor and the fourth temperature sensor and, when the temperature detected by the selected temperature sensor is higher than the temperature detected by the first temperature sensor, rotates the electric fan in the direction of invoking an airflow from the air-inlet through the inside of the casing toward the air-outlet if the selected temperature sensor is the third temperature sensor, but rotates the electric fan in the direction of invoking an airflow from the air-outlet through the inside of the casing toward the air-inlet if the selected temperature sensor is the fourth temperature sensor.