FOREIGN MATTER ATTACHMENT PREVENTION DEVICE

WIPO Patent Application WO/2022/014490

A1

Provided is a foreign matter attachment prevention device which ensures safety and prevents the attachment of foreign matter to a window surface of an underwater structure.　A foreign matter attachment prevention device 1 includes a light emitting unit 20 which irradiates an inspection window surface 110 of an underwater structure 100 with irradiation light, and a shielding part 30 which can prevent leakage of the irradiation light to the inside of the underwater structure 100. The irradiation light has a peak in the 405-412 nm wavelength region. The irradiation light has an irradiation intensity of at least 25 Wm-2 when the divalent iron ion concentration in the water outside the window surface is less than 0.1 mg/L, and an irradiation intensity within a range of 25 Wm-2 to 100 Wm-2 when the divalent iron ion concentration in the water outside the window surface is at least 0.1 mg/L. The irradiation with the irradiation light inhibits the attachment of organisms, biofilms, or coatings formed by iron-containing compounds onto the inspection window surface 110.

WO/2011/013176	ANTIFOULING SHEET
WO2008041000	SURFACE CLEANING APPARATUS
WO/2001/009465	VEHICLE WASHING HALL

YANAGAWA TOSHIHARU (JP)
OYAMA KEIJI (JP)
SAITO SHINSUKE (JP)
YAMASHITA KEIJI (JP)
KAMIYA KYOKO (JP)

PCT/JP2021/025946

January 20, 2022

July 09, 2021

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CHUGOKU ELECTRIC POWER (JP)
SESSILE RES CORPORATION (JP)

B08B17/00

WO2016157343A1	2016-10-06
WO2015092850A1	2015-06-25

US20200138989A1	2020-05-07
JPH09220549A	1997-08-26
JP2018509886A	2018-04-12
JP2009243160A	2009-10-22
JPH11269838A	1999-10-05

SHOBAYASHI Masayuki et al. (JP)

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