| 摘要 |
<p>PURPOSE:To control the temperature in a box body finely, by comparing the detection output of the internal temperature of the box body with an optimum set value and outputting a fan control command in accordance with the comparison output to control the internal temperature to a set temperature. CONSTITUTION:The internal temperature of the box body is detected by a thermosensor 21 provided in the box body and is outputted to a controller 9. The controller 9 compares the detection output of the sensor 21 with an optimum set value which is set by a temperature setting switch; and if the detected temperature is higher, the fan control command by which the internal temperature becomes a temperature determined by the set value is generated in accordance with the difference and is given to a fan controller 22. Consequently, the controller 22 gives the fan driving output of a rotation number corresponding to the comnand to a fan 23 to cool the inside of the box body. If the internal temperature is lowered excessively by cooling, the controller 9 instructs the controller 22 to stop the fan 23, and the controller 22 stops driving of the fan 23.</p> |
