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CarstenD

Creality Ender 3 part cooling fan duct

by CarstenD Sep 9, 2018
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Hi,

I like your design but I saw this ring that have optimized the air exit.
Then I do no know if I should be better to use this other vent ring or wait you upgrade yours if this other have a better cooling.
https://www.thingiverse.com/thing:3343456

Do you have any idea or comment ?

Ender 3 Vent Ring 2
by Filboyt

Nice design. I tried a lot of cooling parts available on thingiverse but I always go back to the stock fan. I recently discovered that it is even possible to print with the cooling fan completely turned off.
Much quiter and no difference in print quality. You don't need the fan, just the correct slicer settings.
Check this: https://www.youtube.com/watch?v=Qg47Std5ywI

I admire the simplicity, but unfortunately it doesn't work on my Ender 5 - the nozzle doesn't protrude below the duct.

I am currently using a ring and going to 'upgrade' to a dual 5015 fan hero me. I havent printed this one, yet. Wanted to comment and say what a great design. Very finished and impressive. Nice work!

This is the smartest design I've found! thank you CarstenD!
I'm an aerospace engineer and I was looking for a compact design, I tried this one, but unfortunately, the airflow isn't compensated at the center of the extruder, in order to improve this design it is necessary to make the farthest conduit wider than the conduit which is closer to the fan because of;
-This design devides the air 2 (gemoetricaly equal) airflows but one of the ducts is longer than the other and it has a curve, which increases the amount of air resistance. Due of this fact, the longer conduit will have more pressure losses.
-The air exit area of the longer air duct is bigger so this will reduce its air speed for the same amount of air given to both candidates.
-The amount of air given by the fan may not be equally distributed. I forgot to test this, but if the fan doesn´t make a proper air flow, it will affect this design.
So to trim this device we could:
-make a bigger intake for the longer conduit by making small the shorter one
-make a smaller out area of the longer tube by making a bigger out area in the short one
-Do both options
Other minor improvements:
-We could sharpen the air intake conduits, it will reduce pressure losses.
-We could reduce the thickness of the structural walls that follows the square shape, this is because it will make a lighter design and it will help to evacuate the air that comes from the extruder.

I am using this design these days, i think it is clever and easy to modify. This were my suggestions, just in case you wanted to improve your own design; at the end, it is only dealing with areas! and the best ways to trim the design, it would be with a simulation of air flow in ANSYS or just trial and error! Thank you!

Thanks for your very pro comments and suggestions. While reading your comment I was in the process of redesigning the duct for much better air flow direction. Please check out version 2. That said, the stock fan is not the most efficient choice. Have a look at the radial solution here: https://www.thingiverse.com/thing:3102082

Creality Ender 3 Radial Part Cooling Fan Duct

Any chance a water dimple test picture could be uploaded? I'd really like to see where the air jet is centered in relation to the nozzle.

It isn`t centered. One of the sides has the mayority of the airflow

Is there room for a heat sock with this

Hi CarstenD

Is it possible to use the mirror conversion function on some slicer, so that the opening is in the front? Therefore we can see the the extruder directly. Nice design btw.

Nope. I tried, but it can't be mirrored since the nozzle is off center from the heater block. Nozzle hits the fan shroud elbow.

Yeah you're right. Tonite I will try to mirror other surfaces as well to see.

Comments deleted.