Ozone generator

Patent metadata

Field	Value
Publication number	US-9321645-B2
Application number	US-201514666781-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Mar 31, 2014
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

An ozone generator includes a housing having an internal cavity and a plurality of electrode pairs located in the internal cavity. The electrode pairs each contain two electrodes arranged at a distance of a predetermined gap length, and a discharge space is formed between the two electrodes, whereby ozone is produced when a source gas flows at least between the two electrodes and a discharge is generated between the two electrodes. The ozone generator has a non-discharge portion in an arbitrary cross-section having a normal direction parallel to a main flow direction of the source gas in the internal cavity.

First claim

What is claimed is:

1. An ozone generator comprising a housing having an internal cavity and a plurality of electrode pairs located in the internal cavity, wherein the electrode pairs each contain two electrodes arranged at a distance of a predetermined gap length, and a discharge space is formed between the two electrodes, and ozone is produced when a source gas flows at least between the two electrodes of the electrode pair and a discharge is generated between the two electrodes, and wherein of the two electrodes, one electrode is located on an upstream side of the source gas, and another electrode is located on a downstream side of the source gas such that a direction from the one electrode toward the another electrode is inclined with respect to a main flow direction of the source gas,
the plurality of electrode pairs are arranged adjacent to one another in at least one of a direction perpendicular to a supply direction of the source gas and the supply direction of the source gas, and
the ozone generator has a non-discharge portion on an arbitrary cross-section having a normal direction parallel to the main flow direction of the source gas in the internal cavity.

2. The ozone generator according to claim 1 , wherein the plurality of electrode pairs are arranged adjacent to one another in one of the supply direction of the source as or the combination of the direction perpendicular to the supply direction of the source gas and the supply direction of the source gas.

3. The ozone generator according to claim 1 , wherein in a case where a portion of the electrode pair including the discharge space is hypothetically cut by the cross-section,
the ozone generator has an area ratio Ab/Aa of 20% or more, wherein Aa represents an area of the cross-section and Ab represents an area obtained by subtracting a projected area of the electrode pair and the discharge space in the cross-section from the area Aa of the cross-section.

4. The ozone generator according to claim 1 , wherein in a case where a portion of the electrode pair with the discharge space is hypothetically cut by the cross-section,
the ozone generator has an area ratio Ab/Aa of 80% or more, wherein Aa represents an area of the cross-section and Ab represents an area obtained by subtracting a projected area of the electrode pair and the discharge space on the cross-section from the area Aa of the cross-section.

5. The ozone generator according to claim 1 , wherein 80% or more, by number, of the electrode pairs are arranged at a distance of 5 mm or more from a center line of the internal cavity.

6. The ozone generator according to claim 1 , wherein all of the electrode pairs are arranged at a distance of 5 mm or more from a center line of the internal cavity.

7. The ozone generator according to claim 1 , wherein 80% or more, by number, of the electrode pairs are arranged at a distance of 10 mm or more from a center line of the internal cavity.

8. The ozone generator according to claim 1 , wherein all of the electrode pairs are arranged at a distance of 10 mm or more from a center line of the internal cavity.

9. The ozone generator according to claim 1 , wherein an angle between the direction from the one electrode toward the another electrode and the supply direction of the source gas has an absolute value of 80° or less.

10. The ozone generator according to claim 1 , wherein an angle between the direction from the one electrode toward the another electrode and the supply direction of the source gas has an absolute value of 60° or less.

11. The ozone generator according to claim 1 , wherein an angle between the direction from the one electrode toward the another electrode and the supply direction of the source gas has an absolute value of 10° or more.

12. The ozone generator according to claim 1 , wherein an angle between the direction from the one electrode toward the another electrode and the supply direction of the source gas has an absolute value of 30° or more.

13. The ozone generator according to claim 1 , wherein the source gas is an atmospheric air having an absolute humidity of 0 to 50 g/m 3 .

14. The ozone generator according to claim 1 , wherein the gap length is at least 0.1 mm and less than 1.0 mm.

15. The ozone generator according to claim 1 , wherein the electrodes each contain a tubular dielectric body having a hollow portion and a conductive body disposed in the hollow portion of the dielectric body.

Assignees

• Ngk Insulators Ltd

Inventors

• Kondo Yoshimasa
• Yokoi Shoji
• Terazawa Tatsuya
• Takase Naoya

Classifications

• C01B2201/14

  Concentric/tubular dischargers · CPC title

• C01B2201/40

  using several dischargers in series · CPC title

• C01B2201/22

  Constructional details of the electrodes · CPC title

• C01B2201/62

  Air · CPC title

• C01B13/115 Primary

  characterised by the electrical circuits producing the electrical discharge · CPC title