Ender 3 Vent Ring - Inward facing airflow

thingiverse

I'm glad you're looking for a replacement fan nozzle for your Ender 3 printer. This one is designed to focus the air stream directly onto the nozzle, rather than having it blow at the bed. It works seamlessly with the stock fans and screws. To be honest, I'm not much of a modeling expert, so I'm sure someone more skilled can take this design and make it even better. The overhangs on this nozzle can get a bit messy, but that's just part of the process. If you wanted to improve it further, you could try extending the nozzles towards the center and making them narrower for an even more focused airflow. A little sanding might also help increase the gaps between the nozzle and print. If you're looking for an improved version of this design, I've found one located here: https://www.thingiverse.com/thing:3179146