IP Library › Granted Patent US 12662398
Granted Patent B2
US 12662398 · App. 18/491,046 · Granted Jun 23, 2026

Ultraviolet light fluid treatment device

Inventor: Shunsuke Miyajima (Suwa, JP)
Assignee: NICHIA CORPORATION
C02F1/325A61L9/20A61L2209/12C02F2201/3228C02F2303/04
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Quick Facts
Patent No.
US 12662398
App. No.
18/491,046
Granted
Jun 23, 2026
Kind
B2
Abstract

An ultraviolet light fluid treatment device for irradiating a fluid flowing in a flow path tube with ultraviolet light includes a substrate; a light source disposed on the substrate and configured to emit the ultraviolet light; a light transmissive member disposed between the light source and the flow path tube and configured to transmit the ultraviolet light from the light source; and a support member fixed to the substrate and configured to hold an adsorption member that includes an adsorbent material adsorbing moisture. The support member has a reflective surface. The reflective surface is positioned between the light source and the adsorption member, and is configured to reflect the ultraviolet light from the light source.

Claims (31)

1 . An ultraviolet light fluid treatment device for irradiating a fluid flowing in a flow path tube with ultraviolet light, the ultraviolet light fluid treatment device comprising:

a substrate;

a light source disposed on the substrate and configured to emit the ultraviolet light;

a light transmissive member disposed between the light source and the flow path tube and configured to transmit the ultraviolet light from the light source; and

a support member fixed to the substrate and configured to hold an adsorption member that includes an adsorbent material adsorbing moisture,

wherein the support member includes:

a through hole inside of which the light source is disposed in a plan view as seen in a direction normal to a main surface of the light transmissive member;

a recessed portion which is located outside the through hole in the plan view and is open towards the light transmissive member; and

a wall portion partitioning the through hole and the recessed portion,

wherein an inner surface of the wall portion defining the through hole is a reflective surface, and the adsorption member is disposed within the recessed portion such that the wall portion is located between the light source and the adsorption member.

2 . The ultraviolet light fluid treatment device according to claim 1 , wherein an upper end of the adsorption member is positioned lower than an upper end of the support member.

3 . The ultraviolet light fluid treatment device according to claim 1 , wherein the adsorption member overlaps the light transmissive member as viewed in a direction normal to a main surface of the light transmissive member.

4 . The ultraviolet light fluid treatment device according to claim 2 , wherein the adsorption member overlaps the light transmissive member as viewed in a direction normal to a main surface of the light transmissive member.

5 . The ultraviolet light fluid treatment device according to claim 1 , wherein the reflective surface is disposed around the light source, and the adsorption member is disposed around the reflective surface.

6 . The ultraviolet light fluid treatment device according to claim 2 , wherein the reflective surface is disposed around the light source, and the adsorption member is disposed around the reflective surface.

7 . The ultraviolet light fluid treatment device according to claim 3 , wherein the reflective surface is disposed around the light source, and the adsorption member is disposed around the reflective surface.

8 . The ultraviolet light fluid treatment device according to claim 5 , wherein the adsorption member is continuously disposed around the reflective surface.

9 . The ultraviolet light fluid treatment device according to claim 6 , wherein the adsorption member is continuously disposed around the reflective surface.

10 . The ultraviolet light fluid treatment device according to claim 7 , wherein the adsorption member is continuously disposed around the reflective surface.

11 . The ultraviolet light fluid treatment device according to claim 1 , wherein the support member has an attachment hole at a position that is inward of an outer edge of the support member and that does not overlap the adsorption member as viewed in a direction normal to a main surface of the light transmissive member, and

the support member is fixed to the substrate by a fixing member inserted into the attachment hole.

12 . The ultraviolet light fluid treatment device according to claim 2 , wherein the support member has an attachment hole at a position that is inward of an outer edge of the support member and that does not overlap the adsorption member as viewed in a direction normal to a main surface of the light transmissive member, and

the support member is fixed to the substrate by a fixing member inserted into the attachment hole.

13 . The ultraviolet light fluid treatment device according to claim 3 , wherein the support member has an attachment hole at a position that is inward of an outer edge of the support member and that does not overlap the adsorption member as viewed in a direction normal to a main surface of the light transmissive member, and

the support member is fixed to the substrate by a fixing member inserted into the attachment hole.

14 . The ultraviolet light fluid treatment device according to claim 1 , wherein the adsorption member comprises a resin containing the adsorbent material.

15 . The ultraviolet light fluid treatment device according to claim 2 , wherein the adsorption member comprises a resin containing the adsorbent material.

16 . The ultraviolet light fluid treatment device according to claim 3 , wherein the adsorption member comprises a resin containing the adsorbent material.

17 . The ultraviolet light fluid treatment device according to claim 1 , wherein the adsorbent material comprises a porous material comprising at least one material selected from a group consisting of silica gel, activated carbon, and a silicate mineral.

18 . The ultraviolet light fluid treatment device according to claim 2 , wherein the adsorbent material comprises a porous material comprising at least one material selected from a group consisting of silica gel, activated carbon, and a silicate mineral.

19 . The ultraviolet light fluid treatment device according to claim 3 , wherein the adsorbent material comprises a porous material comprising at least one material selected from a group consisting of silica gel, activated carbon, and a silicate mineral.