Title:
DETECTOR
Document Type and Number:
WIPO Patent Application WO/2011/089879
Kind Code:
A1
Abstract:
Disclosed is a detector having a smoke density detection vs. time characteristic and a gas concentration detection vs. time characteristic which are displaced from each other, thereby having the advantages of both early detection of a fire and prevention of a false report of a fire. Specifically disclosed is a detector (10) provided with: a labyrinth (32) for shielding against external light to prevent the light from directly entering the detector; and a smoke detection unit for receiving on a light reception unit (30) light diffused by the smoke flowing into a chamber (26) which is provided with an insect net (34) covering the periphery of the labyrinth (32), wherein the light reception unit (30) is disposed in the chamber (26) so as not to directly receive the light emitted from a light emitting unit (28). A cover (12) of the detector (10) receives a thermal air current and has an opening (20) in the surface thereof. An electrochemical gas sensor (36), which brings gas generated by a fire into contact with an electrolyte solution through the opening (20) and thereby detects the gas by use of electrodes, is disposed within the cover (12) behind the opening (20).
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Inventors:
MAMMOTO, Atsushi (10-43 Kamiosaki 2-chome, Shinagawa-k, Tokyo 60, 〒1418660, JP)
万本 敦 (〒60 東京都品川区上大崎二丁目１０番４３号ホーチキ株式会社内 Tokyo, 〒1418660, JP)
万本 敦 (〒60 東京都品川区上大崎二丁目１０番４３号ホーチキ株式会社内 Tokyo, 〒1418660, JP)
Application Number:
JP2011/000218
Publication Date:
July 28, 2011
Filing Date:
January 18, 2011
Export Citation:
Assignee:
HOCHIKI Corporation (10-43, Kamiosaki 2-chome Shinagawa-k, Tokyo 60, 〒1418660, JP)
ホーチキ株式会社 (〒60 東京都品川区上大崎二丁目１０番４３号 Tokyo, 〒1418660, JP)
MAMMOTO, Atsushi (10-43 Kamiosaki 2-chome, Shinagawa-k, Tokyo 60, 〒1418660, JP)
ホーチキ株式会社 (〒60 東京都品川区上大崎二丁目１０番４３号 Tokyo, 〒1418660, JP)
MAMMOTO, Atsushi (10-43 Kamiosaki 2-chome, Shinagawa-k, Tokyo 60, 〒1418660, JP)
International Classes:
G08B17/10; G01N27/416
Attorney, Agent or Firm:
SAITO, Tatsuya (Inspire Patent and Trademark Attorneys, Akasaka Abitasion Building 6F 1-3-5, Akasaka, Minato-k, Tokyo 52, 〒1070052, JP)
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Claims: