This construction is the solution for anyone looking for cool air, although certainly catch his hands.
The people who built took a small portable fridge, refrigerator plastic, a plastic drainage angle and a small desk fan. They made two holes for the fan and the tube. Once put in the fan outlet that creates air which comes out of the tube.
Prerequisite course for cold air is the refrigerator having means large pieces of ice or frozen bottles. The ice cubes are not recommended because they melt more easily.
See video of how it works …