# US 10,320,160 B2 · Ion generation apparatus and electrical equipment

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- Number: US 10,320,160 B2
- Document ID: US10320160B2
- Status: Granted
- Kind: B2
- Application number: 14/914,279
- Filed: 2014-08-27
- Published: 2016-07-14
- Granted: 2019-06-11
- Earliest claimed: 2014-03-31
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Hiromu Nishida; Nobuyuki Ohe; Koichi Izu
- Web page: https://patentgrep.com/patent/US10320160B2

## CPC

- H01T 19/04: having pointed electrodes
- B03C 3/38: Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
- B03C 3/74: Cleaning the electrodes
- B03C 3/743: {by using friction, e.g. by brushes or sliding elements}
- H01T 23/00: Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
- B03C 3/41: Ionising-electrodes
- B03C 2201/06: Ionising electrode being a needle
- H01T: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)

## Abstract

An ion generation apparatus that can facilitate the separation of adhering materials from a discharge electrode and efficiently generate ions includes an induction electrode, and a discharge electrode for generating ions between the discharge electrode and the induction electrode. The discharge electrode has a plurality of filament-like conductors, and a joining portion to tie the bottoms of the conductors together. The induction electrode is arranged at the bottom side of the conductors.

## Claims

### Claim 1

An ion generator comprising:
an induction electrode;
a discharge electrode that generates ions between the discharge electrode and the induction electrode;
a first circuit board including a hole extending through the first circuit board;
a second circuit board arranged parallel to the first circuit board;
a housing that houses the first circuit board and the second circuit board; and
an insulating resin that covers and is in contact with an upper surface and a lower surface of the first circuit board and an upper surface and a lower surface of the second circuit board, the first circuit board and the second circuit board being buried in the insulating resin, and the insulating resin electrically isolating the induction electrode from the discharge electrode; wherein
the discharge electrode protrudes from the housing and includes a plurality of filament conductors;
the plurality of filament conductors protrude from the housing to an outside of the housing in a direction that is perpendicular to the first circuit board and the second circuit board, and protrude from a joining portion which joins bottoms of the conductors together;
the induction electrode is located at a bottom side of the conductors;
the insulating resin is uncovered such that the insulating resin is exposed to the outside of the housing;
the insulating resin is in contact with the induction electrode such that the induction electrode is sealed with the insulating resin;
the discharge electrode protrudes from the insulating resin;
lengths of the conductors protruding from the joining portion are less than or equal to half of a length of the discharge electrode protruding from the insulating resin;
the induction electrode is formed on the upper surface of the first circuit board; and
the discharge electrode is fixed to the second circuit board and extends through a center of the hole in the first circuit board.

### Claim 2 (depends on 1)

The ion generator according to claim 1, wherein
each of the conductors has an outer diameter of 5 μm or more and 30 μm or less.

### Claim 3 (depends on 1)

The ion generator according to claim 1, wherein
the lengths of the conductors protruding from the joining portion are 3 mm or more.

### Claim 4 (depends on 1)

The ion generator according to claim 1, wherein
the induction electrode has an annular shape surrounding the discharge electrode.

### Claim 5 (depends on 1)

The ion generator according to claim 1, wherein
the insulating resin fills the housing.

### Claim 6 (depends on 1)

Electrical equipment comprising:
the ion generator according to claim 1; and
an air blower that delivers ions generated in the ion generator.

### Claim 7 (depends on 1)

The ion generator according to claim 1, wherein a bottom portion of the discharge electrode is in contact with the insulating resin.