Negative ion generators

Jan 22, 2007 12 Replies

Hi all, I hope you can assist me with some questions about negative ion generators and ozone production.



Firstly, I've been searching for some schematics (with no luck,I can only find flyback transformer ccts and cockroft walton types of ccts) for those commercial negative ion generators (not ozone generators) you often see at the source or on ebay that utilize a metal plate to collect dirt and pollutants (without any luck) while the business end of things supposedly generates "ion wind" into the local air to give you that warm fuzzy feeling. (It's obvious a negative ion generator's mood lifting effects aren't that tremendous otherwise it would spell the answer to todays world peace issues...lol) How are these "plates" connected to collect stuff from the air?



Secondly is my confusion about ozone production, and the safety of ozone in our living quarters in the first place. There is so much conflicting information about ozone exposure, and if it's good or bad, and at what levels are safe and beneficial or hazardous it's not funny.



Even more confusing is reading one vendor's claims that no ozone is produced by their units so they are safer, while another vendor of the exact same Chinese made generic device preaches how good it's tiny amount of ozone production is good for you!



Is there a calculation when designing a crockcroft walton generator for example which can tell you how much ozone is being produced along with the negative ions? Additionally, is nitric acid also not produced by these high voltage units, or is an arc necessary to produce nitric acid?



Are there differences in the negative ions properties depending on factors such as different types of HV circuits that generate them (neon sign transformer,photocopier HV supply,laser supply or a voltage multiplier cct), the type of needle (copper, steel, aluminum)that delivers the ions to the air, or is a negative ion a negative ion depending solely on the proportions of voltage and current? I only ever read about the count of negative ions, but not about their intensity or amplitude, are some ions more "charged" than others?



Sorry for so many questions, I'm only posting here to clarify the confusion caused by so much literature on the net, and the lack of schematics. I thought I actually knew something about the subject until read so much!



Thanks!


hello, I was in the same boat as you last year while searching for mood lifting etc. I also stumbled upon the ''pikashoes''

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that utilise negative ion generator, it is quite amusing..

I'm sorry that i can't help you with your Qs. the reason being after last year, I've learned that at least one half of the sources for info on Neg ions are lying. it's misinformation after misinformation. good luck though.

Like a battery. You "spray" electron into the air (corona, like a laser printer does), they find a home on stuff in the air... the bigger the easier to attach to, then attract the electrons some distance away with the positive pole.

It isn't toxic. What doesn't do damage right away, doesn't hang around to poison you long-term. Ozone is produced *very selectively* in your body by white blood cells. The result of excess ozone exposure could be hardening of the arteries (plaque formation). Beyond frying the delicate membranes in your lungs, of course.

I breathed 12 wt% ozone on a couple of occasions. Massive headache, and felt really wierd for a while. But I didn't lose any additional hair, and I did not develop asthma. Of course, I didn't feel "giddy like a schoolgirl" either.

You can add a small amount of catalyst (carulite 200), and achieve a net reduction in ambient ozone. That (or something similar) is what "Ionic Breeze" folks did.

You will always make some ozone. Percentages, I am not sure.

If you have humidity, oxygen and nitrogen, you will make oxides of nitrogen N2O, NO2, and N2O5.

I believe you are dead on. The electron that forms the charged species has no idea how it was launched, nor does the "assembly" know once it lands.

Unlikely that once something is charged it can hang around long enough to accept another electron.

You can reduced charged species formation if you get the electron removed right away, both surfaces are *very* clean, and the air is very dry. Other than that...

If in doubt, don't.

David A. Smith

Thanks David, Your information is very helpful. What about the hookup? Where does the "collection plate" actually hook up to? I am awaiting delivery of a bunch of negative ion "modules",

120vac in and one wire out -7.5kV. There is no positive output or ground wires, just black in, white in, and red out.

Where would one hook up a collection plate to this device?

Also, is there actually a way to control the amount of negative ions produced as opposed to the amount of ozone produced by a device?

For example, if your familiar with the PAPIMI therapeutic devices, they put out 50kV @ 1mhZ (not sure of the current I'm sure it's in the order of mA's) and have no ozone production to speak of (that one can sense anyhow). I've seen the sparks that come off of those things, they have some crazy pulsed complex waveform duty cycle. I never smelled ozone during it's operation. Is the production of ozone in HV generators relative to the equation:

Di

-- Dt

Thanks ;)

dlzc wrote:

You don't, unless you are building a dust collector which is quite different.

Well, there are two choices:

1) the chassis, or 2) (God help you) the neutral of the 120vac (the white wire).

Not with the device, only with the feed gas (and of course keeping the surfaces clean and *dark*). Visible light in concert with NOx and hydrocarbons (which could include "dust") can make ozone.

Proabably microamps.

Not to the best of my knowledge. But then I always wanted to maximize ozone production.

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... the cell in there was at one time my design. Don't know what it is now.

I know of ozone production cells that run close to megahertz...

Good luck.

David A. Smith

Who needs ozone, this subject alone is enough to get a headache.

I was going to say Ground it, but have seen warnings like that before but never did understood why, but where else you ground something in an apartment. So I stuck to battery powered flyback generator and the TV I found it in even had a tripler brick.

As to the amount of ozone, it is proportional the the voltage and therefore it's starting velocity as it leaves the emitter. Hmmm perhaps that is one of the static electricity properties, the electron doesn't travel trough a conductor and it's speed is not constant. While it's speed is high enough to produces ozone, one electron can produce more molecules along it's 'bumper ball' path. With low enough voltage the ozone creation is in the immediate vicinity of the emitter and farther it travels away the more likely it is it will disassociate, also there is probably greater abundance of conditions that allow it to revert back to O2 with smaller amount of O3 generated.

At least that's the way I explain it.

Cheers.

Ok then, how do build a dust collector? So far I'm no further ahead, I'll be more direct, can anyone supply me the schematic for this unit?? (Including how they connect the collection plates!!) I just want to build a device that will remove all the cooties from the air and fill it with happy joy joy little friendly ions.

;)

See below URL:

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Homer J Simps>

Look for a library big enough to have back copies of Radio Electronics (US) and search them. IIRC they've done both projects in the past.

. . . . . . . .

It is excellent as a chemical additive to water treatment. It is really effective as a chemical treatment to remediate smoke and mold. It is otherwise a legally controlled / proscribed pollutant, and any medical discussions can run afoul of the law.

You run the risk of tripping GFIs, and you turn your house into a radio transmitter... wiping out nearby communications across a wide band of frequencies.

As good as any. In air, corona forms at around 1000 volts (some of which you can get from the shape of the electrode). It only takes ~2 volts to ionize oxygen, some of which will land on O2, some of which will land on N2, and some of which will collapse back on its partner after the electron leaves.

It is all black magic.

David A. Smith

Hi, Technician

I purchased a surplus electronics 7.5kv device for neg ion generation (uses 120v wall power). Here is some hook-up info that I found, but can't say if it works, I never tried it:

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btw- I like the smell of ozone. And for some strange reason positive ions, (and not negative ions) lift my mood.

saxum g.n.

This unit either uses the mounting hardware as the positive reference, or where he says "properly wired home" the neutral wire. Notice that it is DC output, and no sort of AC.

David A. Smith

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