| 摘要 |
<p>PURPOSE:To quickly protect the heat generation part of an electronic apparatus while preventing an unnecessary system down by giving an alarm to continue cooling with the other fans at the time of the stop of one fan and stopping power supply to the electronic apparatus at the time of the stop of all fans. CONSTITUTION:When one fan 1A is stopped by abnormality, it is detected by a fan stop detecting sensor 2A, and a lamp 3A is lit through a fan stop detecting part 41A of an alarm control circuit 4. When both fans 1A and 1B are simultaneously stopped, this state is detected by fan stop detecting sensors 2A and 2B, and fan stop detecting parts 41A and 41B of the alarm control circuit 4 are turned on, and a power break signal is given from a fan stop detecting part 42 to a breaker 6 to stop the power supply from a power supply device 5 to an electronic apparatus 0. Thus, the heat generation part of the electronic apparatus is quickly protected while preventing an unnecessary system down.</p> |
