Inline UV LED water disinfection and heating
Embodiments of the present invention relate generally to on-aircraft potable water disinfection with UV LED light sources that are positioned in-line with the water delivery system. Further embodiments relate to using the scavenged heat generated by the LEDs to deliver heat back to the water supply tube for temperature stabilization and to prevent water freezing.
1. An inline ultraviolet light emitting diode water treatment system, comprising:
(a) a water supply line;
(b) a plurality of LED water line tube sections, each comprising a circular cross-section and an opening along a tube section that supports a side module extending away from the opening, the module supporting one or more ultraviolet light emitting diodes, and further comprising a curved lens covering the opening and contouring with the circular cross-section of the tube section, positioned to isolate the one or more ultraviolet light emitting diodes from water flow;
(c) wherein the plurality of LED water line tube sections are spaced along and help form the water supply line, such that water flowing through the water supply line is treated at multiple locations as it passes the plurality of LED water line tube sections spaced along the water supply line without requiring a pass through a separate water treatment device or chamber; and
(d) an outer sheath encasing at least a portion of the water line tube sections and configured to insulate and retain heat energy produced by the one or more ultraviolet light emitting diode in order to heat water flowing through the water supply line.
2. The system of claim 1 , wherein the one or more ultraviolet light emitting diode is maintained in the side module via adhesive securement with a heat resistant adhesive, mechanically secured via a screw and thread configuration, soldered in place, provided on a fitting, or positioned on a background or plate that is positioned around the water line tube section such that the UV LEDS can shine through openings.
3. The system of claim 1 , wherein the side module comprises the UV LEDs in an array that is covered by a lens, and wherein the curved lens is positioned in line with a side of the water line tube section.
4. The system of claim 1 , wherein the system is mounted on board a passenger transportation vehicle.
5. The system of claim 1 , wherein the system is mounted on board an aircraft.
6. The system of claim 1 , wherein the at least one ultraviolet light emitting diode is modular, such that one or more diodes may be removed and replaced.
7. The system of claim 1 , wherein the at least one ultraviolet light emitting diode comprises a plurality of ultraviolet light emitting diodes having different wavelengths.
8. The system of claim 1 , wherein the at least one ultraviolet light emitting diode emits light at a wavelength of between about 220 nm to about 310 nm.
9. The system of claim 1 , wherein the at least one ultraviolet light emitting diode is used to sense the water quality of the water passing though the water supply line.
10. The system of claim 1 , wherein the at least one ultraviolet light emitting diode generates heat, and wherein the heat is harnessed to supply heat to the water supply line, to the water line tube sections, or both.
11. The system of claim 1 , wherein at least one of the plurality of water line tube sections is configured to be positioned along an existing water line pipe.
12. The system of claim 1 , wherein at least one of the plurality of water line tube sections is configured to replace a portion of an existing water supply pipe.
13. The system of claim 1 , wherein at least one of the plurality of water line tube sections is configured to be an outer sleeve for a transparent water line pipe.
14. The system of claim 1 , further comprising a UV reflective rail member positioned within at least one of the plurality of water line tube sections.