# US 12,005,149 B2 · Fluid sterilizer and associated connecting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,149 B2 - Document ID: US12005149B2 - Status: Granted - Kind: B2 - Application number: 18/301,663 - Filed: 2023-04-17 - Published: 2023-08-10 - Granted: 2024-06-11 - Earliest claimed: 2013-09-05 - Assignees: Seoul Viosys Co., Ltd. - Applicants: Seoul Viosys Co., Ltd. - Inventors: Seong Min Lee; Young Hwan Son; Jae Seon Yi; Jong Rack Kim; Ik Hwan Ko - Web page: https://patentgrep.com/patent/US12005149B2 ## CPC - A61L 2/10: Ultraviolet [UV] radiation - C02F 1/325: {Irradiation devices or lamp constructions} - C02F 2201/003: Coaxial constructions, e.g. a cartridge located coaxially within another - C02F 2201/3222: Units using UV-light emitting diodes [LED] - C02F 2201/3227: Units with two or more lamps - C02F 2201/3228: Units having reflectors, e.g. coatings, baffles, plates, mirrors - C02F 2303/04: Disinfection - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - 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) ## Abstract A sterilizer is provided to include: a first pipe having an inner wall with a light reflecting property; a second pipe disposed in the first pipe so as to pass fluid therethrough and formed of a light transmitting material; and a plurality of UV LEDs arranged on the inner wall of the first pipe and configured to irradiate sterilization UV light onto the fluid. ## Claims ### Claim 1 A sterilizing device for sterilizing a fluid, comprising: a first pipe having a closed region and an open region that are disposed at opposite sides of the first pipe, the open region of the first pipe configured to allow a fluid to enter the sterilizing device for sterilization; a second pipe disposed inside the first pipe and having an open region spaced apart from the closed region of the first pipe; a light reflector disposed on the first pipe and configured to prevent occurrence of a non-irradiation region of ultraviolet (UV) light within the second pipe; and a first UV light emitting diode (LED) and a second UV LED that are disposed on the first pipe and configured to irradiate the UV light onto the fluid; wherein one of the first UV LED and the second UV LED is positioned within a beam angle of the UV light emitted by the other of the first UV LED and the second UV LED, and wherein the closed region of the first pipe is structured to allow the fluid to change a direction of a flow from a first direction to a second direction and the first pipe and the second pipe are configured to increase irradiation time of the UV light per unit volume for the fluid as compared to a case having only one pipe. ### Claim 2 (depends on 1) The sterilizing device of claim 1, wherein the first direction is opposite to the second direction. ### Claim 3 (depends on 1) The sterilizing device of claim 1, wherein the beam angle ranging from 110° to 140° . ### Claim 4 (depends on 1) The sterilizing device of claim 1, wherein the first pipe includes a metal. ### Claim 5 (depends on 1) The sterilizing device of claim 1, wherein the first UV LED and the second UV LED are configured to sterilize the fluid flowing in the space between the first pipe and the second pipe after the fluid changes the direction from the first direction to the second direction at the closed region of the first pipe. ### Claim 6 (depends on 1) The sterilizing device of claim 1, wherein an input for the fluid to enter the sterilizing device and an output for the fluid to come out from the sterilizing device are disposed at a second side of the first pipe that is opposite to the first side of the first pipe. ### Claim 7 (depends on 1) The sterilizing device of claim 1, wherein the first UV LED and the second UV LED are disposed on different sides of the first pipe. ### Claim 8 (depends on 1) The sterilizing device of claim 1, wherein the fluid is sterilized by the first UV LED and the second UV LED while the fluid flows inside the second pipe and outside the second pipe. ### Claim 9 A sterilizing device for sterilizing a fluid, comprising: a first pipe having a closed region at a first side of the first pipe and having a light reflecting property that reflects ultraviolet (UV) light; a second pipe disposed inside the first pipe and structured to provide a passage for a fluid to pass through the second pipe, the second pipe including a light transmitting material to allow the UV light to enter the second pipe; a light reflector disposed on the first pipe and arranged to prevent occurrence of a non-irradiation area of the UV light within the second pipe; and a first UV light emitting diode (LED) and a second UV LED that are disposed on the first pipe and configured to irradiate the UV light onto the fluid; wherein the second pipe has an open region that is disposed at one side of the second pipe and spaced apart from the closed region of the first pipe, and wherein the closed region of the first pipe is structured to allow the fluid to change a direction of a flow from a first direction to a second direction and the second pipe is configured to increase irradiation time of the UV light per unit volume for the fluid as compared to a case without the second pipe. ### Claim 10 (depends on 9) The sterilizing device of claim 9, wherein the first direction is opposite to the second direction. ### Claim 11 (depends on 9) The sterilizing device of claim 9, wherein the fluid is sterilized by the first UV LED and the second UV LED while the fluid flows inside the second pipe and outside the second pipe. ### Claim 12 (depends on 9) The sterilizing device of claim 9, wherein the first pipe includes a metal. ### Claim 13 (depends on 9) The sterilizing device of claim 9, wherein the first UV LED and the second UV LED are configured to sterilize the fluid flowing in the space between the first pipe and the second pipe after the fluid changes the direction from the first direction to the second direction at the closed region of the first pipe. ### Claim 14 (depends on 9) The sterilizing device of claim 9, wherein an input for the fluid to enter the sterilizing device and an output for the fluid to come out from the sterilizing device are disposed at a second side of the first pipe that is opposite to the first side of the first pipe.