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Patent Searching and Data


Title:
FINE PARTICLE DETECTOR
Document Type and Number:
WIPO Patent Application WO/2019/155920
Kind Code:
A1
Abstract:
This fine particle detector 10 comprises: a ceramic casing 22; an electrical charge generation unit 30 that applies an electrical charge 28 generated by discharge to fine particles 26 in a gas that is introduced into a gas passage 24, and forms charged fine particles P; a trapping unit 50 that traps the charged fine particles; and a count measurement device 64 that detects the number of fine particles on the basis of a current that changes in accordance with the charged fine particles P trapped by the trapping unit 50. The trapping unit 50 has a trapping electrode 54 exposed to the gas passage 24, and a counter electrode 52 that opposes the trapping electrode 54 across the gas passage 24. The trapping unit 50 traps the charged fine particles P on the trapping electrode 54 by using an electrical field generated between the trapping electrode 54 and the counter electrode 52 due to a voltage applied between the trapping electrode 54 and the counter electrode 52. The casing 22 has a guard electrode that absorbs a leak current that flows from the counter electrode 52 through the casing 22 to the trapping electrode 54.

Inventors:
KANNO, Keiichi (2-56, Suda-cho, Mizuho-ku, Nagoya-cit, Aichi 30, 〒4678530, JP)
OKUMURA, Hidemasa (2-56, Suda-cho, Mizuho-ku, Nagoya-cit, Aichi 30, 〒4678530, JP)
MIZUNO, Kazuyuki (2-56, Suda-cho, Mizuho-ku, Nagoya-cit, Aichi 30, 〒4678530, JP)
Application Number:
JP2019/002562
Publication Date:
August 15, 2019
Filing Date:
January 25, 2019
Export Citation:
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Assignee:
NGK INSULATORS, LTD. (2-56, Suda-cho Mizuho-ku, Nagoya-cit, Aichi 30, 〒4678530, JP)
International Classes:
G01N15/06; G01N27/68; H01T19/04
Domestic Patent References:
WO2015146456A12015-10-01
Foreign References:
JP2010210538A2010-09-24
JP2007229647A2007-09-13
JPS5379572A1978-07-14
US20130265574A12013-10-10
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (SC Fushimi Bldg, 16-26 Nishiki 2-chome, Naka-ku, Nagoya-sh, Aichi 03, 〒4600003, JP)
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