Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5205711.
This is a Car Fan Funnel. Both bigger parts can be connected with a hose or pipe. This was used to cool down a childs seat in the car when driving in summer at hot temperatures. So the child seat gets cooled.
The funnel end has to be mounted to the air ventilation of your car. Therefore the clamp2 (or clamp1) has to be assembled to the funnel with M3 (or M4) screws (see pictures). The other end with the ventilation output can be placed (for example) into the back of the child seat. Other use cases are possible :). For example into a cooling bag or something.
The "clamp1" is an alternative to "clamp2" if this would fit better into the air ventilation output of your car.
If any changes are necessary download the scad file and change what ever you need.
Print can be made in PLA, as the parts do not have any stress. I printed mine in PETG anyway.