Ultraviolet sterilization device

Abstract

An ultraviolet (UV) sterilization device includes: a quartz liner having a hollow tubular structure forming a closed flow channel for a fluid; a UV LED module disposed outside the quartz liner, emitting UV light into the fluid within the closed flow channel for sterilization; a UV reflective layer providing multiple internal reflections of UV light within the fluid to enhance the UV sterilization effect; and an outer sleeve fitted over the UV LED module. The closed flow channel extends axially along the hollow tubular structure and has a flow channel inlet and an outlet, both extending outwards from the UV sterilization device.

Claims

1. An ultraviolet (UV) sterilization device, comprising: a closed flow channel for a fluid to flow through; a UV LED module for emitting UV light into the fluid within the closed flow channel to sterilize the fluid; a quartz liner having a hollow tubular structure, located between the closed flow channel and the UV LED module to isolate the closed flow channel from the UV LED module; and an outer sleeve fitted over the closed flow channel, the UV LED module, and the quartz liner; wherein... The ultraviolet LED module is disposed outside the quartz liner tube. A closed flow channel is formed within the hollow tubular structure, extending axially along the hollow tubular structure and having an inlet and an outlet. The inlet and outlet extend outwards from the ultraviolet sterilization device. The quartz liner tube is coated with an ultraviolet reflective layer, causing multiple internal reflections of the ultraviolet light passing through the fluid within the quartz liner tube, thereby enhancing the sterilization effect on the fluid. The emitting layer has at least one light-transmitting hole, and the ultraviolet LED module has at least one ultraviolet light source circuit. The ultraviolet light source circuit emits ultraviolet light into the closed flow channel through the light-transmitting hole in a ring-shaped inward manner. The surface of the ultraviolet LED module is in thermal contact with the quartz liner through multiple thermal pads, and the waste heat of the at least one ultraviolet light source circuit is transferred to the fluid in the closed flow channel through the thermal pads and the quartz liner. The waste heat is then transferred to the outside of the ultraviolet sterilization device by the fluid.

2. The ultraviolet light sterilization device as claimed in claim 1, wherein the ultraviolet LED module is disposed within the hollow tubular structure, the ultraviolet LED module having an extruded part and at least one ultraviolet light source circuit, the at least one ultraviolet light source circuit being disposed on the outer surface of the extruded part to emit ultraviolet light into the closed flow channel, wherein the surrounding space is located at the distance between the quartz liner and the outer sleeve, and is fixed or has multiple distances.

3. The ultraviolet light sterilization device as claimed in claim 2, wherein the ultraviolet light source circuits are respectively disposed on a plurality of disposed surfaces surrounding the outer surface of the extruded part, and emit ultraviolet light into the closed flow channel in a ring-shaped outward manner, wherein the material of the extruded part includes aluminum, aluminum alloy, copper, copper alloy, iron, stainless steel, magnesium alloy, ceramic, and plastic composite material.

4. The ultraviolet sterilization device as claimed in claim 2, wherein the outer surface of the extruded part is in thermal contact with the quartz liner by a plurality of thermal pads, and the waste heat of at least one ultraviolet light source circuit is transferred to the fluid in the closed flow channel through the extruded part, the thermal pads and the quartz liner, and then the waste heat is transferred to the outside of the ultraviolet sterilization device by the fluid.

5. The ultraviolet sterilization device as claimed in claim 2 further includes a heat pipe having an evaporation end and a condensation end, the evaporation end being in thermal contact with the extruded part or the ultraviolet light source circuit, and the condensation end being located at a heat dissipation position of the ultraviolet sterilization device.

6. The ultraviolet light sterilization device as described in claim 2 further includes an ultraviolet light sensor and a control circuit, wherein when the ultraviolet light sensor senses that the ultraviolet light intensity in the closed flow channel is lower than a threshold value, the control circuit controls the luminous intensity of the ultraviolet light source circuits to adjust the ultraviolet light intensity in the closed flow channel to not be lower than the threshold value.

7. The ultraviolet sterilization device as claimed in claim 2 further includes at least one sealing structure disposed at the side end of the closed flow channel between the quartz liner and the outer casing to restrict fluid from entering the closed flow channel from the flow channel inlet and leaving the closed flow channel from the flow channel outlet, wherein the quartz liner has good electrical insulation, light transmittance, and a low coefficient of thermal expansion.

8. The ultraviolet sterilization device as claimed in claim 1 further includes a temperature sensor disposed at a sensing position in the closed flow channel to sense the operating temperature of the ultraviolet LED module or the closed flow channel.

9. The ultraviolet light sterilization device as claimed in claim 1 further includes an ultraviolet light sensor or a differential pressure gauge, wherein during several monitoring cycles, the ultraviolet light sensor detects that the intensity of ultraviolet light in the closed flow channel gradually decreases or the pressure loss of the fluid in the closed flow channel gradually decreases, and determines that there is dirt or deposits in the closed flow channel.

10. An ultraviolet (UV) sterilization device, comprising: a quartz liner having a hollow tubular structure, wherein a closed flow channel for a fluid is formed within the hollow tubular structure; a UV LED module disposed outside the quartz liner, emitting UV light into the fluid within the closed flow channel for sterilization; a UV reflective layer covering the outside of the quartz liner, providing multiple internal reflections of UV light within the fluid to enhance the sterilization effect of the fluid, wherein the UV reflective layer has at least one light-transmitting hole, the UV LED module has at least one UV light source circuit, the UV light source circuit emitting UV light into the closed flow channel through the light-transmitting hole in a ring-shaped inward manner; and an outer sleeve fitted over the UV LED module; wherein... The closed flow channel extends along the axial direction of the hollow tubular structure and is provided with a flow channel inlet and a flow channel outlet, which extend outward from the ultraviolet sterilization device.

11. An ultraviolet (UV) sterilization device, comprising: a quartz liner having a hollow tubular structure; a UV LED module disposed within the hollow tubular structure, the UV LED module having an extruded part and at least one UV light source circuit, the at least one UV light source circuit being disposed on the outer surface of the extruded part; and an outer sleeve fitted over the quartz liner, having an annular space between the sleeve and the quartz liner, the annular space forming a closed flow channel for a fluid, wherein... The enclosed flow channel extends along the axial direction of the ultraviolet sterilization device in the surrounding space and has a flow channel inlet and a flow channel outlet. The flow channel inlet and the flow channel outlet extend outward beyond the outer casing. The ultraviolet LED module emits ultraviolet light into the fluid in the enclosed flow channel to sterilize the fluid. At least one ultraviolet light source circuit emits ultraviolet light into the enclosed flow channel. The outer surface of the extruded part is in thermal contact with the quartz liner through multiple thermal pads. The waste heat of the at least one ultraviolet light source circuit is transferred to the fluid in the enclosed flow channel through the extruded part, the thermal pads, and the quartz liner. The waste heat is then transferred to the outside of the ultraviolet sterilization device through the fluid.

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