HEPA / Carbon Filter for 3D Printer Enclosure.
Description
I wanted to make a HEPA/ carbon filter for my large 3D printer enclosure, that would filter and recirculate the air in the enclosure to reduce fumes . Unfortunately, all the ones I could find used filters that were hard to find or quite expensive. So I decideed to use filters that were made for another device. I finally settled on these: 4-PACK 3-Stage Filtration System Replacement Filters for LEVOIT LV-H128 and LV-H13EU Air Purifiers,Compare to LV-H128-RF and LV-13EU-RF (https://www.amazon.co.uk/dp/B0BVZB1FFR) At £17.00 for 4, they seemed quite cheap. I based my design on that of danielschweinert (https://www.thingiverse.com/thing:4100832 ) and that of DanielDesigns ( https://www.thingiverse.com/thing:5304572 ). It is not a remix though, as everything has been designed from scratch. I have added a small duct, so as to push the air away from the filter intake and ensure better circulation. The fan I have used is (as I could not find the Titan Blower that was used previously) a Delta BFB1012VH Turbo Cooling Fan 9733 DC12V 2.70A 3Pin (https://www.ebay.co.uk/itm/355807699276). It comes with 3 wires, but you only need to the red and the black and can remove the blue, For fitting the various parts together I used twelve x 4M x 15mm. For fitting the fan to the fan holder I used two x 4M x 45mm. The holes are threaded for the full depth, so you could use longer, or even shorter ones. The top holes, to fit the whole filter assembly to the top of the 3D printer enclosure, are threaded to take M5 screws. Length depend on your cabinet/enclosure top thickness. I used these for the power connectors ( https://www.amazon.co.uk/dp/B0CZT37VMR)- fits a 11 mm hole. The fan is quite strong and probably needs a speed control. I am adding a speed control that will be at the front of the cabinet and separate (but obviously connected) to the filter assembly , that will be at the back of the 3D printer enclosure. If you want to have one in the actual filter assembly, then the ones I have based my design on have one and you should be able to base a modification on them. The speed controller I am using is a RUNCCI-YUN 2pcs DC 12v PWM motor speed controller ( https://www.amazon.co.uk/dp/B09SH3P8QC ). As some have used a seal between the fan and the filter, I used about 1-2 mm thick double sided foam tape to make a seal. I am not convinced it is needed though
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