120MM Centrifugal Fan CPAP Mod
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A Budget CPAP mod that uses a 120mm centrifugal fan instead of a WS7040-24-v200 Blower. Budget, but still powerful!
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Other Printer Parts & Upgrades
- Licencja
- Creative Commons — Attribution — Noncommercial — Share Alike
A mod that allows you to use a 120MM fan for CPAP. This mod cost me ~$30 USD.
Update: Some users seemed to have have issues with a small gap once printed. I made an adjusted come to hopefully help solve this issue
!!! IMPORTANT NOTE !!! This mod was designed to use the cuff of a CPAP tube which has an ID of 22mm. So as a result, the OD of the cones top is also 21mm. Do NOT cut off the cuff of your CPAP tube or you wont be able to use this mod
Why is the Cone so long? Well, it follows an important HVAC rule of thumb which is: Don't narrow a duct by more than 11 degrees measures wall vs opposite wall. This ensures that the cone doesn't throttle airflow by narrowing the path to quickly.
Why are there holes in the CPAP Cone Holder? Just to reduce filament waste and print times. Though some may prefer the rigidity.
Comment on this model if you have any issues, and I will try to fix it.
Bill Of Materials:
| Name | Amount | My Source: |
| M5 T-Nut | 2 | https://a.co/d/bKw5OyA |
| M3x8 Socket Cap Bolt | 3 | https://boltdepot.com/Product-Details?product=6379 |
| M5x8 Socket Cap Bolt | 2 | https://boltdepot.com/Product-Details?product=6406 |
| M5x10 Socket Cap Bolt | 3 | https://boltdepot.com/Product-Details?product=6407 |
| 120MM Centrifugal Fan | 1 | https://a.co/d/ifqRSyT |
| 15MM Diameter CPAP Hose with a 22MM ID Tube Cuff | 1 | https://a.co/d/dWVqJlY |
Assembly Instructions:
- place the two M5 T-Nuts into the 2020 aluminum extrusion matching the top holes of the Cpap Cone Holder.
- Screw in the two M5x8 Socket Cap Bolt to secure the Cpap Cone Holder
- place the 120MM Centrifugal Fan at the bottom of the Cpap Cone Holder and use the three M5x10 Socket Cap Bolts to screw the fan into place.
- Place the Cpap Cone onto the 120MM Centrifugal Fan and use the three M3x8 Socket Cap Bolt to secure the Cone to the Cpap Cone Holder.
- Attach the 15MM Diameter CPAP Hose with a 21MM ID Tube Cuff to the Cpap Cone