blowing dust away with bouncy castle compressor??

Is it a compressor, or a fan blower? All bouncy castles I have seen are just using a fan that is basically just a large leaf blower.

Using any type of electric blower (vacuum cleaner, leaf blower, etc) is not advised due to static electricity.

Using any type of air compressor is not advised unless you understand everything that makes it an issue.
Compressor can have too high of pressure, and moisture.

The best solution is to use the canned compressed air that wont have any static or moisture.

No matter what method you use, you should always use a pencil or other object to prevent fans from spinning when you blow on them. Depending on the bearing type this could wear them out or flat out break them.