P2S VOC exhaust gas purification system (designed for filtering harmful gases like ABS and ASA, with large-capacity activated carbon)
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Description
Background Description
Recently, after looking at many MakerWorld users' discussions on filtering and exhausting particulate pollutants released during printing, as well as the official exhaust fan kit, I found a problem: for filtration protection, most filters are just small filter papers (filter cartridges). First, for ordinary users, how can one ensure that the filter cartridges they buy are reliable and genuine, considering that online shopping has many fake and substandard products
Furthermore, users who purchase the P2S are bound to try engineering materials such as ABS, ASA, and nylon. We need to know that official descriptions for these materials also state that besides particulate volatiles, VOC gas pollution is also generated during printing, which is why officials require a ventilated environment. Some MakerWorld users adopt filtration systems to mitigate these risks, but I found that in these designs, they either directly place a pile of activated carbon or directly use an integrated activated carbon filter cartridge solution (like Xiaomi filter cartridges)
According to a ChatGPT query on "filtration hazards when printing ABS filament", printing these types of materials requires physical filtration + a "5-10cm" thick activated carbon double filter to be effective
Based on this background, I designed an external exhaust filtration system using automotive cabin air filters as a base, combined with an activated carbon layer approximately 10cm thick. It is compatible with 20*20CM filter cartridges from various brands. I used the Freudenberg CF106 filter cartridge as a blueprint for its creation
Product Introduction
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The product structure is divided into:
1. P2S fixing hook
2. Poop bin layer
3. Filter cartridge layer
4. Activated carbon layer
5. Fan
※ The P2S hook uses the Bambu Lab's own scraper fixing screws (you can also find screws of the same specification), fixing it at the vent of the P2S poop chute (see picture), and secured with screws
※ The front of the poop bin layer is embedded with 6MM*3MM magnets. I have reserved many holes, so you can install magnets according to your actual needs, not necessarily all of them
※ Place the purchased filter cartridge into the filter cartridge layer and close the top cover. It is recommended to tape the top cover; this does not mean tape is absolutely necessary, it is merely to prevent loosening
※ Use screws-washers-poop bin-filter cartridge layer to secure both. Note here, do not overtighten the screws; just ensure there are no gaps
※ It is recommended to place a zip tie in the activated carbon slot to facilitate the disassembly of the slot when replacing the activated carbon later
※ Activated carbon is divided into coconut shell activated carbon and columnar activated carbon. The difference between the two is that the former has strong gas adsorption capacity but is "fine and fragmented", while the latter is easier to store but has slightly weaker adsorption capacity. I use coconut shell activated carbon, packed in a soy milk filter bag
※ Install a 14CM cooling fan on the back of the filter cartridge layer (see picture for effect)
BOM List
1. 6mm*3mm magnets
2. Freudenberg automotive cabin air filter CF106
https://item.jd.com/100023923789.html
3. 14cm fan
Here are three recommendations:
USB port-5V:
DC port-12V:
PC fan port-24V:
4. Activated carbon
5. Soy milk filter bags
https://item.jd.com/68354459673.html
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License
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