| 摘要 |
<p>A cooling device is provided with: a cooling unit for cooling air within a control box by exchanging heat with a refrigerant; a fan for stirring the air within the control box; a temperature detection means for detecting the temperature in the control box; and a frequency control means for controlling the drive frequency of a compressor circulating the refrigerant. The cooling device is configured so that, when the temperature detection means for detecting the temperature in the control box detects a temperature higher than or equal to a predetermined temperature, the frequency control means lowers the frequency. As a result, even if the cooling unit cannot sufficiently cools a control component, the drive frequency of the compressor is lowered to a frequency lower than or equal to a predetermined frequency to prevent the temperature of the control component from rising to a temperature higher than or equal to a predetermined temperature. This prevents damage to the control component and ensures higher reliability.</p> |
