UV-irradiation apparatus

Patent metadata

Field	Value
Publication number	US-10364166-B2
Application number	US-201414917914-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Sep 12, 2013
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

An UV-irradiation apparatus of an embodiment is provided with an irradiation unit, a measuring unit, a detecting unit, a calculator and a display. The irradiation unit irradiates treatment water as a treatment target with treating ultraviolet rays. The measuring unit measures ultraviolet ray intensity of ultraviolet rays transmitted through the treatment water. The detecting unit detects a deterioration of the irradiation unit in accordance with the ultraviolet ray intensity measured by the measuring unit. The calculator calculates the ultraviolet ray permeability of the treatment water, on the basis of the ultraviolet ray intensity of ultraviolet rays emitted from the irradiation unit depending on a preset setting value and the ultraviolet ray intensity measured by the measuring unit. The display displays the detection result of the deterioration of the irradiation unit by the detecting unit, and the ultraviolet ray permeability calculated by the calculator.

First claim

The invention claimed is:

1. A UV-irradiation apparatus comprising:
a first irradiation unit and a second irradiation unit that irradiate treatment water with ultraviolet rays respectively having a first ultraviolet ray intensity and a second ultraviolet ray intensity;
a first measuring unit that is associated with the first irradiation unit and a second measuring unit that is associated with the second irradiation unit, the first measuring unit and the second measuring unit respectively measuring a third ultraviolet ray intensity and a fourth ultraviolet ray intensity of ultraviolet rays transmitted through the treatment water, wherein
the first measuring unit is spaced relative to a first central axis of the first irradiation unit and the second measuring unit is spaced relative to a second central axis of the second irradiation unit at a predetermined liquid phase distance that is based on
a preset allowable error of ultraviolet ray permeability of the treatment water and
a predetermined value that indicates when treatment performance to the treatment water cannot be maintained;

a detecting unit that detects deterioration of the first irradiation unit and the second irradiation unit in accordance with the third ultraviolet ray intensity and the fourth ultraviolet ray intensity respectively measured by the first measuring unit and the second measuring unit;
a calculator that calculates the ultraviolet ray permeability of the treatment water, on the basis of the first ultraviolet ray intensity and the second ultraviolet ray intensity of ultraviolet rays respectively emitted from the first irradiation unit and the second irradiation unit depending on a preset setting value and the third ultraviolet ray intensity and the fourth ultraviolet ray intensity respectively measured by the first measuring unit and the second measuring unit; and
a display that displays an ultraviolet ray monitor indication value indicative of a detection result of the deterioration of the first irradiation unit and the second irradiation unit by the detecting unit, and an ultraviolet ray permeability value, distinct from the ultraviolet ray monitor indication value, indicative of the ultraviolet ray permeability calculated by the calculator, wherein:
the predetermined liquid phase distance allows the ultraviolet ray permeability to be obtained when a displacement amount of the ultraviolet ray permeability due to deterioration associated with the first irradiation unit is equal to or less than the preset allowable error; and
the predetermined liquid phase distance allows the ultraviolet ray permeability to be obtained when the displacement amount of the ultraviolet ray permeability due to deterioration associated with the second irradiation unit is equal to or less than the preset allowable error.

2. The UV-irradiation apparatus according to claim 1 , wherein the detecting unit further detects the deterioration of the first irradiation unit and the second irradiation unit in accordance with the ultraviolet ray permeability calculated by the calculator.

3. The UV-irradiation apparatus according to claim 1 , wherein:
the first measuring unit is further disposed to be spaced apart from the first central axis of the first irradiation unit so that the displacement amount of the ultraviolet ray permeability is equal to or less than the preset allowable error when the third ultraviolet ray intensity measured by the first measuring unit is lowered to the predetermined value in which a treatment performance to the treatment water cannot be maintained; and
the second measuring unit is further disposed to be spaced apart from the second central axis of the second irradiation unit so that the displacement amount of the ultraviolet ray permeability is equal to or less than the preset allowable error when the fourth ultraviolet ray intensity measured by the second measuring unit is lowered to the predetermined value in which a treatment performance to the treatment water cannot be maintained.

4. The UV-irradiation apparatus according to claim 1 , wherein the calculator calculates a first effective irradiation intensity and a second effective irradiation intensity of ultraviolet rays respectively emitted from the first irradiation unit and the second irradiation unit, and a first effective transmission intensity and a second effective transmission intensity respectively measured by the first measuring unit and the second measuring unit, on the basis of the permeability of ultraviolet rays with respect to the treatment water measured by an external measuring device, and calculates the ultraviolet ray permeability on the basis of the first and second effective irradiation intensities and the first and second effective transmission intensities.

5. A UV-irradiation apparatus comprising:
a first irradiation unit and a second irradiation unit that irradiate treatment water with ultraviolet rays respectively having a first ultraviolet ray intensity and a second ultraviolet ray intensity;
a first measuring unit that is associated with the first irradiation unit and a second measuring unit that is associated with the second irradiation unit, the first measuring unit and the second measuring unit respectively measuring a third ultraviolet ray intensity and a fourth ultraviolet ray intensity of the ultraviolet rays transmitted through the treatment water, wherein
the first measuring unit is spaced relative to a first central axis of the first irradiation unit and the second measuring unit is spaced relative to a second central axis of the second irradiation unit at a predetermined liquid phase distance that is based on
a preset allowable error of ultraviolet ray permeability of the treatment water and
a predetermined value that indicates when treatment performance to the treatment water cannot be maintained;

a detecting unit that detects deterioration of the first irradiation unit and the second irradiation unit in accordance with the third ultraviolet ray intensity and the fourth ultraviolet ray intensity respectively measured by the first measuring unit and the second measuring unit;
a calculator that calculates the ultraviolet ray permeability of the treatment water, using a preset setting value, and a ratio of the third ultraviolet ray intensity and the fourth ultraviolet ray intensity respectively measured by the first measuring unit and the second measuring unit to the first ultraviolet ray intensity and the second ultraviolet ray intensity of the ultraviolet rays respectively emitted from the first irradiation unit and the second irradiation unit in accordance with the setting value, on the basis of the following formula; and
a display that displays a numerical ultraviolet ray monitor indication value indicative of detection results of the deterioration of the first irradiation unit and the second irradiation unit by the detecting unit, and a numerical ultraviolet ray permeability value indicative of the ultraviolet ray permeability calculated by the calculator,
UVT=A ×ln( B×S/D )

wherein:
UVT is a numerical ultraviolet ray permeability value, S is a ratio of at least the third ultraviolet ray intensity or the fourth ultraviolet ray intensity respectively measured by the first measuring unit and the second measuring unit to at least the first ultraviolet ray intensity or the second ultraviolet ray intensity of ultraviolet rays respectively emitted from the first irradiation unit and the second irradiation unit depending on the setting value, D is a ratio representing the setting value, and A and B are predetermined coefficients,
the predetermined liquid phase distance allows the ultraviolet ray permeability to be obtained when a displacement amount of the ultraviolet ray permeability due to deterioration associated with the first irradiation

Assignees

• Toshiba Kk

Inventors

• Kobayashi Shinji
• Abe Norimitsu
• Ide Takeshi
• Shirota Akihiko
• Takeuchi Kenji

Classifications

• C02F2303/04

  Disinfection · CPC title

• C02F2201/3227

  Units with two or more lamps · CPC title

• G01N21/59

  Transmissivity (G01N21/25 takes precedence) · CPC title

• C02F1/52

  by flocculation or precipitation of suspended impurities {(C02F1/463 takes precedence)} · CPC title

• C02F2201/326

  Lamp control systems · CPC title