Light irradiation device

Patent metadata

Field	Value
Publication number	US-11324842-B2
Application number	US-202017018100-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Sep 13, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

The light irradiation device includes a light source supporter having a tubular shape is closed on a side of one end, a plurality of light-emitting elements placed on an outer wall surface of the light source supporter, a tubular body extending inside the light source supporter in an axial direction of the light source supporter, a first flow channel formed between the tubular body and the light source supporter and having an annular shape when viewed from the axial direction; and a second flow channel formed inside the tubular body, wherein the first flow channel and the second flow channel communicate with each other on a side of one end of the light source supporter, and the tubular body contains a material having a thermal conductivity lower than a thermal conductivity of a material constituting an outer wall of the first flow channel.

First claim

What is claimed is:

1. A light irradiation device comprising:
a light source supporter having a tubular shape is closed on a side of one end;
a plurality of light-emitting elements placed on an outer wall surface of the light source supporter;
a tubular body extending inside the light source supporter in an axial direction of the light source supporter;
a first flow channel formed between the tubular body and the light source supporter and having an annular shape when viewed from the axial direction; and
a second flow channel formed inside the tubular body, wherein
the first flow channel and the second flow channel communicate with each other on the side of one end of the light source supporter, and
the tubular body contains a material having a thermal conductivity lower than a thermal conductivity of a material constituting an outer wall of the first flow channel.

2. The light irradiation device according to claim 1 , wherein a gap is interposed between the first flow channel and the second flow channel.

3. The light irradiation device according to claim 2 , further comprising a plurality of supporting projections formed so as to project from the light source supporter toward the tubular body or from the tubular body toward the light source supporter.

4. The light irradiation device according to claim 1 , further comprising a plurality of supporting projections formed so as to project from the light source supporter toward the tubular body or from the tubular body toward the light source supporter.

5. The light irradiation device according to claim 4 , wherein a number of the supporting projections as viewed in the axial direction is at least three.

6. The light irradiation device according to claim 4 , wherein the tubular body includes an inner tubular body having the second flow channel formed therein and an outer tubular body provided so as to surround the inner tubular body.

7. The light irradiation device according to claim 6 , further comprising a plurality of gap-maintaining parts formed so as to project from the inner tubular body toward the outer tubular body or from the outer tubular body toward the inner tubular body.

8. The light irradiation device according to claim 7 , wherein a number of the gap-maintaining parts as viewed in the axial direction is at least three.

9. The light irradiation device according to claim 7 , further comprising a holding member having a function of fixing the light source supporter and the tubular body at an end opposite to the one end of the light source supporter and relieving a thermal expansion difference in the axial direction between the inner tubular body and the outer tubular body.

10. The light irradiation device according to claim 6 , further comprising a holding member having a function of fixing the light source supporter and the tubular body at an end opposite to the one end of the light source supporter and relieving a thermal expansion difference in the axial direction between the inner tubular body and the outer tubular body.

11. The light irradiation device according to claim 10 , wherein the holding member has a mechanism configured to allow the inner tubular body and the outer tubular body to slide along the axial direction.

12. The light irradiation device according to claim 10 , wherein the holding member has an elastic member to allow the inner tubular body and the outer tubular body to be displaced along the axial direction.

13. The light irradiation device according to claim 10 , wherein the outer wall of the first flow channel, the inner tubular body, and the outer tubular body are made of a same material.

14. The light irradiation device according to claim 10 , wherein a flow channel cross-sectional area of the first flow channel as viewed in the axial direction is smaller than a flow channel cross-sectional area of the second flow channel as viewed in the axial direction.

15. The light irradiation device according to claim 6 , wherein the outer wall of the first flow channel, the inner tubular body, and the outer tubular body are made of the same material.

16. The light irradiation device according to claim 6 , wherein a flow channel cross-sectional area of the first flow channel as viewed in the axial direction is smaller than a flow channel cross-sectional area of the second flow channel as viewed in the axial direction.

17. The light irradiation device according to claim 4 , wherein a flow channel cross-sectional area of the first flow channel as viewed in the axial direction is smaller than a flow channel cross-sectional area of the second flow channel as viewed in the axial direction.

18. The light irradiation device according to claim 1 , wherein a flow channel cross-sectional area of the first flow channel as viewed in the axial direction is smaller than a flow channel cross-sectional area of the second flow channel as viewed in the axial direction.

Assignees

• Ushio Electric Inc

Inventors

• Murakami Satoshi
• Kanahashi Yoshihiro

Classifications

• A61L2/10

  Ultraviolet [UV] radiation · CPC title

• G01F1/37

  the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes · CPC title

• A61L2202/122

  Chambers for sterilisation · CPC title

• A61L2/08 Primary

  Radiation · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title