How does a negative ion generator work?

  • Thread starter gabee
  • Start date
  • #1
175
0

Main Question or Discussion Point

Like this one:

http://www.goldmine-elec-products.com/prodinfo.asp?number=G9695

I understand that it uses some sort of "needle assembly," and electric fields are stronger at sharp points in a conductor and then will ionize the surrounding air at a certain potential. But how exactly are the negative charges isolated in the first place? Some friends and I have discussed how this might happen, such as first charging a capacitor, then attaching the negative lead to such a needle assembly, then grounding the positive lead, but we're not exactly sure.
 
Last edited:

Answers and Replies

  • #2
5,428
291
I believe the ionisation is caused when an electron binds loosely with a gas molecule. If you put a high -ve voltage on a needle, electrons can escape from the point.

Some friends and I have discussed how this might happen, such as first charging a capacitor, then attaching the negative lead to such a needle assembly, then grounding the positive lead, but we're not exactly sure.
That's about right. The voltage can come from any source, with the +ve grounded.
 

Related Threads on How does a negative ion generator work?

Replies
1
Views
6K
  • Last Post
Replies
3
Views
25K
  • Last Post
Replies
7
Views
6K
Replies
12
Views
26K
Replies
8
Views
1K
Replies
18
Views
5K
Replies
1
Views
596
  • Last Post
Replies
6
Views
44K
  • Last Post
Replies
3
Views
886
Top