The control cabinet cooling device has a closed cooling loop. In this loop, the gaseous refrigerant is compressed by a compressor and thus heated, and the refrigerant is now under high pressure. It is cooled in a condenser, which changes its physical state from a gas to a liquid, but the high pressure remains. Due to the increasing pressure in the compressor, the liquid refrigerant is pressed through the capillary into the evaporator, which depressurizes and evaporates. The cold is released into the environment. The cooled gaseous refrigerant is now returned to the compressor and the loop is closed. Because of the special function, compressor cooling device is possible.