Powered Air-Purifying Respirator: Difference between revisions

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=Basics=
#REDIRECT [[Open Source PAPR]]
*The formal name is "CAPR" or Controlled-Air Purifying Respirator
*A Device Mainly Used as a filtered/safe air supply in enviroments where there IS oxygen, and the user can breath normally (as in lung function isn't impaired), but a chemical/biological/particulate hazard exists/is expected
*Is essentially a forced air filter, with a hose leading to a mask
*Typically is a belt with the power/controls/filter, then a tube to a mask/hood
*A Similar "box" can feed a [[Positive Pressure Personnel Suit]] , a type of hazmat suit for bio uses (ie doesn't protect against heat (like firefighting "bunker suits" , or from certain liquids and/or radiation like other Hazmat suits
*Many DIY devices are essentially adapted [[CPAP]] machines
 
=Usage=
*Hood and hose are discarded after each use - [https://www.massgeneral.org/assets/MGH/pdf/disaster-medicine/2019-Novel-Coronavirus-(2019-nCoV)-Toolkit-version-1.29.2020.pdf]
*PAPR and general PPE protocols - [https://www.massgeneral.org/assets/MGH/pdf/disaster-medicine/2019-Novel-Coronavirus-(2019-nCoV)-Toolkit-version-1.29.2020.pdf]
*Used in [[Biosaftey Levels]] 3 and 4 (Medical, Bioscience, etc)
*Also useful for welding with large amounts of flux in non well ventilated spaces etc
 
=Industry Standards=
==Welding==
*[https://www.millerwelds.com/safety/respiratory/powered-air-purifying-respirators-m00482#!/?product-options-title=papr-with-t94i-r-264575 A Welding Helmet and Respirator System by Miller]
*[https://www.3m.com/3M/en_US/speedglas-welding-helmets-us/ 3M's Speedglass line]
*All these go for ~1000-3000 USD (Welding Helmet part makes up the most, but still is most likely overpriced
*They typically include the welding eye protection, the air system, a hardhat, a hood, and a system of all these being integrated, and "slidable"?
 
==Medical/Biosaftey==
*[https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Personal-Protective-Equipment/Powered-Supplied-Air-Respirators/?N=5002385+8711017+8720539+8720547+3294857497&rt=r3 3M's Medical/Generic Devices]
 
=Existing Open Source Devices=
==2020==
*WASP version - [https://www.3dprintingmedia.network/personalized-ppe-mask/]
*Snorkeling masks turned to respirators - [https://www.3dprintingmedia.network/isinnova-shares-3d-printed-adapter-to-turn-snorkeling-mask-into-a-non-invasive-ventilator/]
*<html>
<iframe width="560" height="315" src="https://www.youtube.com/embed/oS6GA83nbds" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>
 
==2019==
<html><iframe width="560" height="315" src="https://www.youtube.com/embed/lmNIEDDCqSk" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>
 
=Basic Design=
==Container==
*Either a backpack, like in the video, or a 3d printed "shell"
 
==Power Supply==
*The associated electronics
*Preferabbly something swappable / [[Hot Swappable]] either (For Emergency need (ie we need something that "just works" NOW this may be a lesser need, even just throw a 9/12v battery in the backpack etc)
**A OTS System such as RYOBI 18V etc
**OSE System with the batteries in a 3d Printed shell with inserted metal contacts
 
==Controlls==
*Should be simple enough to use an arduino
*Indicators of flow and status MAY be needed to reach proper capability (if it fails you NEED to know if in a "Hot Zone")
 
==Blower Fan==
*Something with '''X M^3/H ''' airflow (without filter) and '''Y M^3/H ''' airflow (with filter)
*Either OTS or a 3d printed fan with ots motor, or fully open source
 
==Filter Mount==
*A Standard mount, and 3d Printed adapters for different cartriges
 
==Filter==
*Some sort of standard cartrige
*Contractor grade face mask cartriges should work for welding
*Due to the "END IS NEAR" supplies and the surplus military supplies, CBRN grade CAN be used, but is overkill and thus more expensive than need be in most applications
*Standard Biosaftey cartrige?
 
==Hose Adapter==
*Standard?
 
==Face Mask==
*Standard CPAP?
 
=BOM=
*
 
=CAD=
*
 
=Code=
*
 
=See Also=
*[[COVID-19]]
*[[Ventilator]]
*[[Open Source Pressure Swing Absorbtion 99% Nitrogen/High Percentage Oxygen Device]]
 
=Useful Links=
*[[CPAP]]

Latest revision as of 22:17, 24 March 2020

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