# US 2021/0276887 A1 · Ultraviolet irradiation device and method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0276887 A1
- Document ID: US20210276887A1
- Status: Published application
- Kind: A1
- Application number: 16/330,416
- Filed: 2017-08-24
- Published: 2021-09-09
- Earliest claimed: 2016-09-09
- Assignees: Photoscience Japan Corporation
- Applicants: Photoscience Japan Corporation
- Inventors: Yuji YAMAKOSHI
- Web page: https://patentgrep.com/patent/US20210276887A1

## CPC

- C02F 1/325: {Irradiation devices or lamp constructions}
- B01J 19/0013: {Controlling the temperature of the process}
- B01J 19/0073: {Sealings (sealings for pressure vessels per se F16J15/00)}
- B01J 19/123: {Ultraviolet light}
- H05K 7/20: Modifications to facilitate cooling, ventilating, or heating
- H10H 20/855: Optical field-shaping means, e.g. lenses
- H10H 20/8583: {not being in contact with the bodies}
- H10H 20/8586: {comprising fluids, e.g. heat-pipes}
- H10W 40/30: wherein the packaged device is completely immersed in a fluid other than air, e.g. immersed in a cryogenic fluid
- C02F 2103/04: for obtaining ultra-pure water
- C02F 2201/3222: Units using UV-light emitting diodes [LED]
- C02F 2201/3227: Units with two or more lamps
- H10H 20/8582: {characterised by their shape}
- Y02W 10/37: using solar energy
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

The inventive device efficiently cools, with a simple construction, heat generated from an ultraviolet light-emitting diode (UV-LED). The UV-LED is accommodated in a housing that has an open end and an ultraviolet-transparent closing end. A portion of the housing adjacent to the closing end contacts to-be-treated liquid, ultraviolet rays generated from the UV-LED are irradiated to the to-be-treated liquid, and the housing is cooled by the to-be-treated liquid. In this way, the heat generated from the UV-LED can be cooled with a simple construction without use of arrangements for introducing dedicated cooling fluid for cooling the UV-LED. A heat discharge block for discharging to the outside the heat generated from the UV-LED may be provided at or adjacent to the open end of the housing. Further, the present invention may be constructed in such a manner that a portion of the discharge section directly contacts the to-be-treated liquid.

## Claims

### Claim 1

An ultraviolet irradiation device comprising:
a housing having an open end and a closing end of ultraviolet transparency;
an ultraviolet light-emitting diode accommodated in the housing, the ultraviolet light-emitting diode emitting ultraviolet rays therefrom to outside of the housing through the closing end; and
a heat discharge block provided at or adjacent to the open end of the housing and having a body extending in a direction opposite to the closing end,
wherein the ultraviolet irradiation device is arranged in a container containing therein to-be-treated-liquid in such a manner that the ultraviolet irradiation device is fixed to the container, via a portion of the body of the heat discharge block adjacent to a distal end of the body extending in the direction opposite to the closing end, with the closing end of the housing projected in the container, so that a portion of the housing adjacent to the projected closing end contacts the to-be-treated liquid while ultraviolet rays generated from the ultraviolet light-emitting diode are irradiated to the to-be-treated liquid, and that heat generated from the ultraviolet light-emitting diode is cooled by cooling the housing with the to-be-treated liquid contacted thereto and discharging the heat conducted through the housing by the heat discharge block.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The ultraviolet irradiation device as claimed in claim 1, further comprising:
a thermal conductive substance that is filled between the housing and the heat discharge block.

### Claim 4 (depends on 3)

The ultraviolet irradiation device as claimed in claim 3, wherein the thermal conductive substance comprises water or an oil compound for heat radiation that is liquid-tightly filled in at least a portion of a gap between the housing and the heat discharge block.

### Claim 5 (depends on 1)

The ultraviolet irradiation device as claimed in claim 1, wherein a portion of the heat discharge block directly contacts the to-be-treated liquid.

### Claim 6 (depends on 1)

The ultraviolet irradiation device as claimed in claim 1, wherein the heat discharge block includes a fin structure or a radiator structure.

### Claim 7 (depends on 1)

The ultraviolet irradiation device as claimed in claim 1, wherein the housing has a pressure resistant structure.

### Claim 8 (depends on 7)

The ultraviolet irradiation device as claimed in claim 7, wherein the closing end of the housing forms a dome shape.

### Claim 9

An ultraviolet irradiation method employing an ultraviolet irradiation device that includes: a housing having an open end and an a closing end of ultraviolet transparency; an ultraviolet light-emitting diode accommodated in the housing, the ultraviolet light-emitting diode emitting ultraviolet rays therefrom to outside of the housing through the closing end; and a heat discharge block provided at or adjacent to the open end of the housing and having a body extending in a direction opposite to the closing end, the ultraviolet irradiation method comprising:
arranging the ultraviolet irradiation device in a container containing therein to-be-treated-liquid in such a manner that the ultraviolet irradiation device is fixed to the container, via a portion of the body of the heat discharge block adjacent to a distal end of the body extending in the direction opposite to the closing end, with the closing end of the housing projected in the container;
irradiating the to-be-treated liquid with ultraviolet rays from the ultraviolet light-emitting diode while at least the closing end a portion of the housing contacts the to-be-treated liquid in the container; and
cooling heat generated from the ultraviolet light-emitting diode by cooling the housing with the to-be-treated liquid contacted thereto and discharging the heat conducted through the housing by the heat discharge block.