Electronic device and program storage medium

Abstract

A rotation number calculating section calculates rotation numbers per unit time on the basis of pulse signals, a CPU calculates an accumulated rotation number on the basis of a sum of products of the rotation numbers read at a predetermined time interval and the predetermined time, determines whether the accumulated rotation number exceeds a predetermined threshold value, and gives a warning aiming at urging a user to clean a fan in response to a determination result that the accumulated rotation number exceeds the threshold value.

1 . An electronic device with a fan built therein to perform air-cooling by an air flow generated by rotation of the fan, comprising:
 an accumulated rotation number calculating section which calculates an accumulated rotation number of the fan;   a determining section which determines whether the accumulated rotation number calculated by the accumulated rotation number calculating section exceeds a predetermined threshold value; and   a warning section which gives a warning in response to a determination result that the accumulated rotation number exceeds the threshold value, the determination result being obtained by the determination section.   
   
   
       2 . The electronic device according to  claim 1 , wherein
 the fan outputs a pulse signal synchronized with rotation of the fan, and   the accumulated rotation number calculating section calculates rotation numbers per unit time at a predetermined time interval and calculates an accumulated rotation number on the basis of a sum of products of the rotation numbers and the predetermined time.   
   
   
       3 . The electronic device according to  claim 1 , comprising:
 a reset section which resets the accumulated rotation number and the warning in response to a manual operation.   
   
   
       4 . The electronic device according to  claim 1 , comprising:
 at least one of a power source cord which can be freely connected to an external power source and a detachable battery; and   a reset section which resets the accumulated rotation number and the warning in response to connection of at least one of the power source cord and the battery after both the power source cord and the battery are temporarily disconnected.   
   
   
       5 . A program storage medium in which a program executed in an electronic apparatus with a fan built therein to perform air-cooling by an air flow generated by rotation of the fan is stored, the program storage medium storing the program which causes the electronic apparatus to operate as an apparatus comprising:
 an accumulated rotation number calculating section which calculates an accumulated rotation number of the fan;   a determining section which determines whether the accumulated rotation number calculated by the accumulated rotation number calculation section exceeds a predetermined threshold value; and   a warning section which gives a warning in response to a determination result that the accumulated rotation number exceeds the predetermined threshold value, the determination result being obtained by the determining section.