| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system and a method for changing a filter at an optimum time. <P>SOLUTION: The system for determining an air purifier filter change time includes: a motor speed measurement unit 310 configured to measure the rotational speed of a motor that operates a filter provided in the air purifier; a time counting unit 320 configured to count time starting from a point when the motor starts rotating upon receiving power supplied thereto or from a point when the power supplied to the motor is cut off; a speed determination unit 330 configured to check whether or not the rotational speed of the motor has reached a pre-set speed; a time comparison unit 340 configured to receive information about recorded motor running time from the time counting unit and comparing the counted time with a pre-set time duration, when the speed determination unit determines that the rotational speed of the motor has reached the pre-set speed; and a filter change time determination unit 350 configured to check whether or not a filter change is required according to results obtained by comparing the time duration during which the rotational speed of the motor reached the pre-set speed with the pre-set time duration. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
