Fluid sterilization apparatus and fluid sterilization system

Patent metadata

Field	Value
Publication number	US-11957802-B2
Application number	US-202117173350-A
Country	US
Kind code	B2
Filing date	Feb 11, 2021
Priority date	Apr 17, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A fluid sterilization apparatus according to an embodiment includes a tubular cover; a tubular portion provided inside the cover; a supply head provided at one end of the tubular portion; a discharge head provided at the other end of the tubular portion; at least one light-emitting element provided in at least one of the supply head and the discharge head and allowed to irradiate an inside of the tubular portion with ultraviolet rays; and a temperature control unit capable of controlling a temperature of a space between the cover and the tubular portion.

First claim

What is claimed is:

1. A fluid sterilization apparatus comprising:
a tubular cover;
a tubular portion provided inside the cover;
a supply head provided at one end of the tubular portion;
a discharge head provided at the other end of the tubular portion;
at least one light-emitting element provided in at least one of the supply head and the discharge head and allowed to irradiate an inside of the tubular portion with ultraviolet rays; and
a temperature control unit capable of controlling a temperature of a space between the cover and the tubular portion.

2. The apparatus according to claim 1 , further comprising:
a first window provided in the discharge head, one surface thereof being exposed to a flow path provided in the discharge head;
a first board on which the light-emitting element is provided; and
at least one first communication portion communicating with a space between the other surface of the first window and the first board and a space between the cover and the tubular portion.

3. The apparatus according to claim 2 , further comprising:
a first blower portion that generates a gas flow between the space between the other surface of the first window and the first board and the space between the cover and the tubular portion.

4. The apparatus according to claim 1 , further comprising:
a second window provided in the supply head, one surface thereof being exposed to a flow path provided in the supply head;
a second board on which the light-emitting element is provided; and
at least one second communication portion communicating with a space between the other surface of the second window and the second board and the space between the cover and the tubular portion.

5. The apparatus according to claim 4 , further comprising:
a second blower portion that generates a gas flow between a space between the other surface of the second window and the second board and a space between the cover and the tubular portion.

6. The apparatus according to claim 1 , wherein the temperature control unit is provided on the cover.

7. The apparatus according to claim 1 , wherein the temperature control unit is provided inside a hole provided in the cover.

8. The apparatus according to claim 1 , wherein the temperature control unit is a Peltier element.

9. The apparatus according to claim 1 , wherein the temperature control unit has a flow path for circulating a heat medium.

10. The apparatus according to claim 1 , wherein the temperature control unit is a water-cooled jacket.

11. The apparatus according to claim 1 , wherein the temperature control unit includes at least one of an air blower and a heater.

12. The apparatus according to claim 1 , wherein a relative humidity in the space between the cover and the tubular portion is 80% or less.

13. The apparatus according to claim 1 , wherein the cover contains at least one of a resin and an inorganic material.

14. The apparatus according to claim 13 ,
wherein the resin is a phenol resin or a fluororesin, and
the inorganic material is ceramics.

15. The apparatus according to claim 2 ,
wherein the first communication portion has a shape of a pipe,
one end of the first communication portion is connected to the space between the cover and the tubular portion, and
the other end of the first communication portion is connected to the space between the other surface of the first window and the first board.

16. The apparatus according to claim 4 ,
wherein the second communication portion has a shape of a pipe,
one end of the second communication portion is connected to the space between the cover and the tubular portion, and
the other end of the second communication portion is connected to the space between the other surface of the second window and the second board.

17. The apparatus according to claim 3 , wherein the first blower portion is provided in the first communication portion.

18. The apparatus according to claim 5 , wherein the second blower portion is provided in the first communication portion.

19. A fluid sterilization system comprising:
the fluid sterilization apparatus according to claim 1 ; and
a controller capable of controlling a temperature control unit provided in the fluid sterilization apparatus,
the controller controlling the temperature control unit so that a difference between a temperature of a space between a cover and a tubular portion provided in the fluid sterilization apparatus and a temperature of a liquid supplied to the fluid sterilization apparatus becomes small.

20. The system according to claim 19 , wherein the temperature of the liquid is lower than a temperature of an environment in which the fluid sterilization apparatus is provided.

Assignees

• Toshiba Lighting & Technology

Inventors

• Kato Takeo
• Fujioka Atsushi
• Sakurai Naoto
• Iida Seiya
• Ochi Takanori
• Nakagawa Yukinobu

Classifications

• A61L2103/00

  Materials or objects being the target of disinfection or sterilisation · CPC title

• A61L2/10 Primary

  Ultraviolet [UV] radiation · CPC title

• A61L2/26

  Accessories · CPC title

• C02F1/325 Primary

  Irradiation devices or lamp constructions · CPC title

• A61L2202/11

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