Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4193477.RS Cooler Remix for Ender 3
Find the original here.
This is a remix of the Red Squirrel Compact Fan Housing for Creality Ender 3 3D Printer by Red Squirrel Hobbies. The Red Squirrel is my favorite cooling solution for the Ender 3.Changes From the Original
This remix splits the ducts into separate parts. The only issue I have with the original is that access to the nozzle is difficult. If you use a silicone sock it can be hard to remove/install and holding the heater block without a special tool of some sort will probably require removal of the cooler in order to change the nozzle. With this split design, you only need to remove the tool fan to remove the part cooling duct and gain access to the nozzle and heater block.
I modified the fan mounting holes to accept M4 screws and increased the thickness of the 5015 mount point. STL files with holes sized for M3 screws (*_m3.stl) are also supplied.
part_duct.stl can be printed with minimal supports. If you set the overhang angle to 45 degrees and print it with the fan mount face down then you would only get supports under the 5015 fan opening.
Print part_duct_alt.stl either with the fan mount face down or up. You save ~3mm off the distance the fan will stick out at the expense of more supports and cleanup required using this optional part cooling duct.
A generic base lock is included. This should be compatible with other Hero Me mounts.
Step files are included if you need to modify anything.
With Alternative Part Duct
View of Vents