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Fume Extractor advice
Psi:
I found a second hand 2 port floor mounted air extractor system intended for a laser cutter and repurposed that.
The advantage of having something really powerful is you can have the inlet further away from your work area and it will still pull fumes away from your face. Even when soldering close up.
I have a flexible rubber input tube zip-tied to the underside of the microscope at the back.
Works really well as I can move the microscope around as needed and the tube follows it.
The 2nd port i've not used yet and is sealed up, but i'll probably run it to the 3D printer when i can be bothered.
I also like the fact it has a filter so i'm not just pumping solder fumes around the room i'm actually removing them.
joeyjoejoe:
--- Quote from: mastershake on May 27, 2023, 03:58:05 am ---i use ones that look like this unit (they sell them under a number of brand names) https://www.vevor.com/plasma-cutter-c_10061/vevor-filter-fume-extractor-pure-air-fume-extractor-150w-with-3-stage-filters-p_010418357277
--- End quote ---
Is the on/off function digital? I am wondering if I can control it remotely with a smart outlet. If it's digital, which it looks like, probably not.
My other concern with the typical import-grade units is the specifications. Is it actually HEPA, and what is the actual amount of carbon in this case. Also, are replacement filters available now, and will they be available in 5-10 years?
knotlogic:
--- Quote from: furnacemike on July 02, 2022, 10:32:42 pm ---I'm currently looking at 2 fume extractors on Amazon and I'm torn. My basic use is soldering and desoldering. I do a lot of desoldering to salvage components, which can include vacuum gun, hot air, and hot plate. Hot plate desoldering of power boards can be especially bad, since it can produce an especially noxious acrid smoke (you probably know exactly what I mean). I live in an apartment and do not currently have a dedicated workspace, so I am looking for something desktop and portable. This also means venting to outside can be problematic. The specs on both units are similar:
BAOSHISHAN Fume Extractor Soldering 3 Stage Filters Desktop Smoke Absorber
https://www.amazon.com/gp/product/B08P1T4WV5/ref=ewc_pr_img_1?smid=A1WF5PLAB10LN6&psc=1
--- End quote ---
So I recently bought a unit off AliExpress that looks like that BAOSHISHAN, and the suction is.... not great.
It works I suppose, just that I need to be careful about how I position the hose relative to the fume source.
The build quality was a little questionable, but nothing that couldn't be fixed. It comes with a laptop brick style AC-DC power adapter which puts out 12V to a barrel jack. On the unit itself there's a matching port for the barrel jack, and a sticker near it that says 'Input voltage: 230V'. :palm:
Needless to say, I didn't trust the suspiciously light AC-DC brick either. Not a problem since I have a good quality one lying around. Only the DC socket on the unit doesn't actually seem to match any industry standard size. Well, I wanted to open it up anyway to check what's inside... (Which is a 12V 1A fan... good to know it's all low voltage DC in there.)
thm_w:
--- Quote from: beanflying on May 27, 2023, 04:53:44 am ---Still need to finally settle on a design for this but activated Carbon filtration is a bit of a must and it isn't that expensive. As to venting it to outside then that is another whole level of hassle IMO unless you are in a production or heavy use environment. This on is just a case of drop it on the bench near your work and plug it into 12V (in this case).
The Carbon filter just sits behind the front perimeter frame for easy swap out. Just checked the video and this is running around 6V on a 12V 3W fan
https://www.youtube.com/watch?v=kSR3foSyaZg
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If you just use the fan to move air away from you, thats fine. But the foam style carbon filter alone is near useless. You want HEPA, that is the priority here.
beanflying:
--- Quote from: thm_w on May 29, 2023, 09:45:22 pm ---
--- Quote from: beanflying on May 27, 2023, 04:53:44 am ---Still need to finally settle on a design for this but activated Carbon filtration is a bit of a must and it isn't that expensive. As to venting it to outside then that is another whole level of hassle IMO unless you are in a production or heavy use environment. This on is just a case of drop it on the bench near your work and plug it into 12V (in this case).
The Carbon filter just sits behind the front perimeter frame for easy swap out. Just checked the video and this is running around 6V on a 12V 3W fan
https://www.youtube.com/watch?v=kSR3foSyaZg
--- End quote ---
If you just use the fan to move air away from you, thats fine. But the foam style carbon filter alone is near useless. You want HEPA, that is the priority here.
--- End quote ---
You need to understand what 'HEPA' is and is not. It is a term without specification when it comes to anything out of China for a start so because it has a badge on it like the "China Tick" doesn't mean anything. Doesn't mean there isn't country specifications but apart from any major brand of filter you are guessing.
Activated Carbon on the other hand is much better at filtering out organics, solvents, gases/smoke etc than HEPA will ever be. Non woven (NOT FOAM) Carbon like I have used (5mm uncompressed) is typically down to 2-3 microns (generally they use '5' as a number but is a tortured path for the air) while proper Hepa gets you sub 1 but will load up quickly on the surface with Rosin in particular.
Best solution would be a layered approach so Carbon to take out the nasties and a Hepa sub micron layer in behind it. Easy to do and that housing has room for a second simple layer so Laser cutting it and or the Non woven is easy to play I guess.
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