Decathlon easybreath mask filter adapter
thingiverse
Adapter for snorkeling masks to mount 3M cotton 5N11CN filters. Use cotton filter: https://www.3m.com/3M/en_US/company-us/all-3m-products/~3M-Particulate-Filter-5N11-N95-100-EA-Case/?N=5002385+3294776438&rt=rud And this Cover: https://www.3m.com/3M/en_US/company-us/all-3m-products/~3M-Filter-Retainer-501-100-EA-Case/?N=5002385+3294776443&rt=rud I designed two covers, passive and active. To use the active one, you need to do some extra things: print everything with 0.1mm levels. You must stop the outlet air flow if you use the cover with a fan 40mm or if you want to use the filter exclusively for incoming air flow. Plug in the ducts circled in orange so that air flows out from under your mouth. The solution I designed provides a 40mm USB fan, which can be connected to a power bank stuck in the elastic behind your head. 40mm Fan: https://www.amazon.co.uk/ANVISION-Bearing-Brushless-Cooling-YDM4010B05/dp/B074YGZHQG Power Bank: https://www.amazon.co.uk/YOBON-10000mAh-Ultra-Portable-External-Smartphone/dp/B07PVGQQRB/ref=sr_1_21?crid=1HTAAOQQ4ZXVO&keywords=power+banks&qid=1585037423&smid=A1503FW4W9WJT2&sprefix=power%2Caps%2C225&sr=8-21 As you can see in the photo, I use a metal clip to keep everything together. I am proceeding to draw printable clips to replace it but it remains the best solution for now.
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