HEPA Air Filter for LACK Enclosure
Description
UPDATE 01/24/20: Added a reduced height media chamber to reduce chamber volume, print time, and reduce the external profile of the filter. UPDATE 01/10/20: 120x120x25mm version posted as a remix. https://www.thingiverse.com/thing:4095912 UPDATE 01/10/20: Added a version of "Fan Mount (Bottom)" w/o mesh to reduce print time and complexity. Carbon pellets will be exposed to the fan blades in this version so make sure the fan is clear before plugging in. Also replaced my HEPA filter after 4 months so added a photo of the discoloration compared to a new filter. UPDATE 08/02/19: .STEP file added for v7 UPDATE 06/18/19: This is v7 and is a significant upgrade in terms of print time and air flow restriction. The mesh pattern has been updated from a staggered circle to an optimized staggered hex pattern. The Hex width is now down to 2 print lines wide using a 0.4 nozzle (as narrow as I felt comfortable with) and the mesh height has been reduced from 3.25mm to 1.5mm. In PETG this is a little flexible but still more then robust enough for this application. These reductions have reduced print time for the two affected components from 12 hours 45 minutes to 7 hours 45 minutes. The hex pattern has also been easier to print then the previous iteration thanks to the simplified tool paths. Picture above compares the v6 mesh on the left to the v7 mesh on the right. I have no way of measure airflow but I think it's safe to assume that less material in the way means less restriction to flow. -------------------------------------------------------------------------------------------- This is not only my first share but also my first fully designed and developed 3D print! This is v6 with a number of refinements to make it easier to print, improve airflow, and hold together without any hardware. The grid pattern has been tweaked a number of times to maximize airflow, improve printability, and is now just thick enough so it is robust but doesn't take forever to print. I was looking for a HEPA air filter for my LACK enclosure and gave the "HEPA Filter for 3D Printer" by jmillerfo a try. I like the design but thought it would be cool if it was mostly hidden inside the 50mm thick top of the LACK enclosure and I wanted to try and make it as quiet as possible. I started with a remix of the original design by jmillerfo and ended up remaking and redesigning all of the components to make this. Thanks jmillerfo for the inspiration and for doing the leg work on the parts list! The design use the following purchased components however the enclosure was designed to work with any 60mm fan. Just bolt the fan to the bottom fan mount and don't use the top fan mount to enclose the fans. - 2x Noctua fans: https://www.amazon.com/gp/product/B00VXTANZ4/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 - Carbon pellets: https://www.amazon.com/gp/product/B000YIWT20/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 - Roomba HEPA filters: https://www.amazon.com/gp/product/B00K7DMEJ0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I use the top and bottom hole covers as a cutting template for the LACK table and that worked out great. The Noctua fans come with a y connector so you can easy tie them together and feed them from a single power source without any additional modifications. Can also be placed freestanding in the enclosure to clean and recirculate air or be used as a solder fume extractor! Hope you find it useful and please let me know what you think!
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