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Apparatus for the generation of ions
| Details |
Inventors: Fleck, Carl M.;
Assignee:
Primary Examiner: Moose, Jr.; Harry
Assistant Examiner:
Attorney, Agent or Firm: Kelman; Kurt
An air ionizer comprises an ion emission wire and a metallic reflecting shield partially surrounding it, the wire and the shield being connected to a high voltage source. The shield is insulated from ground and its two edges define therebetween a discharge region for the emitted ions. The reflecting polarity of the wire and reflecting shield potentials are the same. The high voltage potential at the shield is at least 3000 V, preferably 5000-10,000 V and does not exceed that at the wire. The potential of the high voltage source to which the shield is connected is at least equal to the potential prevailing at the shield edges due to the electrical field generated by the electrical charge at the wire in the absence of a reflecting shield. |
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DETAILED DESCRIPTION I claim: 1.
An apparatus for generating ions, comprising (a) high voltage source means, (b) a wire of electrically conductive material connected to the high voltage source means for applying a high voltage potential to the wire whereby ions are emitted therefrom, (c) a metallic reflecting shield arranged at a distance from the wire and having two edges wherebetween the shield partially surrounds the wire, the shield edges defining therebetween a discharge region for the emitted ions, and the reflecting shield being connected to the high voltage source means for applying to the shield a high voltage potential of the same polarity as that of the high voltage potential applied to the wire, the high voltage potential at the reflecting shield being at least 3000 V and not exceeding the high voltage potential at the wire, and the potential of the high voltage source means to which the shield is connected being at least equal to the potential prevailing at the shield edges due to the electrical field generated by the electrical charge at the wire in the absence of a reflecting shield, and (d) means for insulating the reflecting shield from ground.
2.
The ion generating apparatus of claim 1, wherein the high voltage potential at the reflecting shield is between 5000 and 10,000 V.
3.
The ion generating apparatus of claim 1, wherein the potential of the high voltage source means to which the shield is connected is higher than that prevailing at the shield edges.
4.
The ion generating apparatus of claim 1, wherein the shield edges are arranged closer to the wire than the reflecting shield therebetween partially surrounding the wire.
5.
The ion generating apparatus of claim 4, wherein the shield is constituted by a portion of a generally cylindrical wall partially surrounding the wire, the wire forming the axis of the cylindrical wall and the edges thereof defining the discharge region being closer to the axis then the cylindrical wall portion.
6.
The ion generating apparatus of claim 1, wherein the reflecting shield is at least partially a perforated screen
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Manufacturing Materials 
