Ultrasonics

[RickAppling]

It does not look like it is feasible at this point. But I am continuing to work on the problem.

Do you think it is worth trying to replace the misting element with something else to try to make it work for vaping, or do you think your tests indicate that it just wouldn't work no matter what?

 

[RickAppling]

I was unclear, the 180mA was for the three volt supply voltage. So it would be closer to half a watt.

I think the question is, can it be replaced? Mine seems to be embedded, for lack of a better word. Bigger mesh wouldn't help and I don't think smaller is possible at home. Would love to be wrong but that is just how I see it.

At 32v and at 180mA it would be drawing 5.76 watts. Taking into account the volume it is great but we don't really need that much.

 

[RickAppling]

Wouldn't work for me. Unless I exhale vapor though my nose I do not get anything.

Interesting. I personally wouldn't mind a much more stealth vape where no cloud followed me

 

[RickAppling]

Because coil/wick works and follows the KISS principal.

As I said earlier the ultrasonics was to move the liquid, not vaporize it. It appears that it was just a idea that got patented. I can find me evidence that it was ever made.

Stupid "My Posts" sort order thing burried this thread 4 pages back...

Please excuse the bump.

I am monitoring, and thanking all of you for the information.

I had assumed that the ultrasonic method would be much more energy efficient. How fast it clogs though....Hmmm. Also induction cautions abound with ultrasonics. They can be used to peer though skin, or even have military applications (e.g. lethality) and who know what. So..... Caution.

However, these results are VERY interesting. Particularly the low power levels.

It may not produce a phase change at all (although it COULD...you are inducing kinetic energy into a small droplet so it may actually get excited enough somehow to vaporize...IDK...total guess and maybe not scientifically correct.)

And of course I too was curious why they aren't all ultrasonic now (hence this thread). Maybe coils are just easier. Or safer. Or warmer. Or any/all of the above.

 

[Bagazo]

Even better but that just drives my point home because even if a solid transducer uses 2 or 3 times the power it would only be 360-540 mA which is well below the 700mA used as a rule of thumb for AA alkalines and way below what e-cigs supply. Drop the volume down from .2ml/min and it becomes a non-issue.

As for why, I don't think KISS is the reason for coils. I think it was the repeat sales gained from another consumable.

 

[Charlie369]

Stupid "My Posts" sort order thing burried this thread 4 pages back...

Please excuse the bump.

I am monitoring, and thanking all of you for the information.

I had assumed that the ultrasonic method would be much more energy efficient. How fast it clogs though....Hmmm. Also induction cautions abound with ultrasonics. They can be used to peer though skin, or even have military applications (e.g. lethality) and who know what. So..... Caution.

However, these results are VERY interesting. Particularly the low power levels.

It may not produce a phase change at all (although it COULD...you are inducing kinetic energy into a small droplet so it may actually get excited enough somehow to vaporize...IDK...total guess and maybe not scientifically correct.)

And of course I too was curious why they aren't all ultrasonic now (hence this thread). Maybe coils are just easier. Or safer. Or warmer. Or any/all of the above.

Ultrasonic misters create Cagvitation, that is tiny bubbles that pop, I think this is the mechanism for the mist creation, I could be wrong.

Its perfectly feasible to build a protype that will vapourise PG, they already use a PG mist in hospital air con to kill airbourne pathogens, and in nebulisers.

The problem you have is not with current draw, the problem is with creating a 142Khz AC power source from a 3.7v DC battery, the electronics needed for that is the challenge,

I had a Pond fogger / mister and that thing was a single piezo electric plate inside a metal casting, I would have opened it up but it was all sealed.

The transformer for it was huge. But they are cheap, you could make a modified home Shisha pipe with one.

The pond fogger I had, I put in the garage sink and it misted up half of the garage, I'm pretty confident you will get probably even better vapour from PG because that it is what they use in Disco smoke machines and nebulisers, and it is used in E-cigs because of its easy vapourisation. The Glycerine is what gives us the majority of our exhale vapour but would be hard to vapourise with an ultrasonic device in large concentrations but you will have to experiment.

I don't still have my pond fogger or I would have tried this a long time ago.


https://www.youtube.com/watch?v=cill_IbtXiw

 

[Charlie369]

I forgot to mention the only real thing that makes ultrasonics mildly dangerous is the cagvitation / heating effect it creates in your blood / cells / gooy bits, it can cause internal burns if you place body parts in the fluid directly over the ultrasonic device, its ok in the water / fluid surrounding.


ultrasonic cagvitation of water...

https://www.youtube.com/watch?v=qGSioE58YjA

 

[Sniffle]

we use ultrasonic nebulizers at work all the time.

here is the one we use in-line with ventilators: Aerogen - Aeroneb Solo

and you can get hand held versions for home use like this one as well: ClinicalGuard.com|Quality UltraNeb Portable Ultrasonic Nebulizer

the only real problem i see with ultrasonic usage in e-cigarettes is that it is a cool, almost cold mist... so you can pretty much eliminate heat and throat hit from the equation it would literally just be vapor production and flavor.