Electric discharge device and air purifying device

Patent metadata

Field	Value
Publication number	US-2019210038-A1
Application number	US-201716327234-A
Country	US
Kind code	A1
Filing date	Aug 4, 2017
Priority date	Sep 30, 2016
Publication date	Jul 11, 2019
Grant date	—

Abstract

A shaft member has the same polarity as discharge electrodes. Each of the discharge electrodes has an electrode body and a tip end which is formed at an end of the electrode body facing an inner peripheral surface of a counter electrode. The discharge electrodes extend such that the tip ends and the electrode bodies are misaligned with each other in an axial direction of the shaft body. A streamer discharge travels from the tip ends of the discharge electrodes toward the inner peripheral surface of the counter electrode.

First claim

1 . An electric discharge device comprising: a shaft member; a plurality of discharge electrodes arranged in a circumferential direction around an axis of the shaft member; a cylindrical counter electrode in which the shaft member and the discharge electrodes are arranged; and a power supply applying a voltage to the discharge electrodes and the counter electrode, wherein
the shaft member has the same polarity as the discharge electrodes, each of the discharge electrodes has an electrode body and a tip end which is formed at an end of the electrode body facing an inner peripheral surface of the counter electrode, the discharge electrodes extending such that the tip ends and the electrode bodies are misaligned with each other in an axial direction of the shaft body, and a streamer discharge travels from the tip ends of the discharge electrodes toward the inner peripheral surface of the counter electrode.

2 . The electric discharge device of claim 1 , wherein
a plurality of electrode rows each having the discharge electrodes arranged in the circumferential direction are arranged in the axial direction of the shaft member.

3 . The electric discharge device of claim 1 , wherein
the discharge electrodes extend to form a predetermined angle with a plane perpendicular to an axis of the shaft member.

4 . The electric discharge device of claim 2 , wherein
each of the discharge electrodes extends obliquely to approach the inner peripheral surface of the counter electrode as the discharge electrode goes toward the tip end.

5 . The electric discharge device of claim 1 , wherein
the discharge electrodes extend along an axial direction of an outer peripheral surface of the counter electrode.

6 . The electric discharge device of claim 3 , wherein
an air flow path through which air flows in the axial direction of the shaft member is formed between the shaft member and the counter electrode, and the discharge electrodes extend so that the tip ends face toward a downstream side in a flow direction of the air.

7 . The electric discharge device of claim 2 , wherein
the tip ends of the discharge electrodes in one of the electrode rows and the tip ends of the discharge electrodes of another electrode row adjacent to the one of the electrode row are misaligned with each other in a circumferential direction when viewed in the axial direction of the shaft member.

8 . The electric discharge device of claim 1 , wherein
the tip ends of the discharge electrodes are arranged at equal intervals around an axis of the shaft member.

9 . An air purification device comprising the electric discharge device of claim 1 .

Assignees

• Daikin Ind Ltd

Inventors

• Kuroi Kiyoshi
• Suzumura Kei

Classifications

• A61L9/22

  Ionisation · CPC title

• B03C3/011

  Prefiltering; Flow controlling · CPC title

• H01T19/04 Primary

  having pointed electrodes · CPC title

• B03C2201/10

  Ionising electrode with two or more serrated ends or sides · CPC title

• H01T23/00

  Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere · CPC title