A system for disinfecting airborne pathogens

Abstract

The vehicle restroom monument assembly includes an enclosure having a plurality of walls that cooperate to define a restroom interior, an entry door disposed in one of the plurality of walls, and a disinfection assembly disposed within the restroom interior. The disinfection assembly includes a duct portion including a duct interior, an inlet, an outlet, and an interior surface defining an air path extending from the inlet through the duct interior to the outlet. A fan is positioned to direct air through the inlet and exhaust air through the outlet. An air disinfecting light system including at least a first air disinfecting luminaire is disposed within the duct between the inlet and the outlet. A reflective coating is disposed on at least a portion of the interior surface.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS The present invention relates generally to air disinfection systems, and more particularly to air disinfection systems for aircraft lavatories. [Background technology]

[0002]

[0002] Commercial airline operations have been disrupted by the COVID-19 crisis. Air passenger travel has been significantly reduced, creating a financial crisis for the industry. Airlines are interested in developing and deploying technologies, products, and solutions to clean, sanitize, disinfect, or even sterilize aircraft interiors before, during, or after flight. Many solutions have been proposed and discussed within the industry and in the general media. These solutions include wiping surfaces with cleaning solutions, replacing materials used in high-touch areas with materials that have antimicrobial properties, adding films with antimicrobial properties to high-touch surfaces, or using UCV lights as a pathogen-killing device. COVID-19 is believed to be an airborne pathogen, and the present invention relates to disinfection of airborne pathogens.

[0003]

[0003] When a toilet is flushed, there is a strong air exchange. This event can disperse fecal matter, which may contain E. coli or viruses (such as SARS-COV-2), into the restroom. The dispersion can contain very small particles, which may harbor pathogens, and these particles can be present in the restroom. Disinfecting and cleaning surfaces cannot eliminate the presence of airborne pathogens in enclosed spaces. A solution is needed that not only purifies the surfaces of the enclosed space, but also the amount of air in the enclosed space.

[0004]

[0004] Commercial aircraft have limited space. One such enclosed space is the restroom, and another is the galley. Before, during, and after the flight, crew and passengers use these confined spaces. Due to the nature of activities in these confined spaces, there may be odors or malodors that are unpleasant to crew and passengers. Passengers often associate odors with cleanliness. Even if the air is disinfected with UV light or other methods, odors or malodors may not disappear. There is also a need to emit a pleasant odor in such a small space. High-quality scent production is available today in various forms. For example, scent marketing is used to enhance the customer experience in retail stores, restaurants, casinos, and hotels. The purpose is usually to put the customer in a positive mood or make the customer feel comfortable. It is also intended to provide a scent that people associate with a clean, fresh, or natural environment. By coupling the disinfection system described herein with a scent production device, a completely clean environment that is potentially free of many harmful bacteria and viruses can be provided, and therefore a pleasant odorless or pleasant aroma-enhanced experience can be provided.

[0005]

[0005] Many disinfection systems target the cleaning of surfaces but not the air volume, which has been a major concern in aircraft lavatories since the start of the COVID-19 pandemic. Systems that can rapidly and effectively disinfect airborne pathogens are needed.

[0006]

[0006] The current state of the art for air purification involves UV radiators. UV radiators have a UV light source inside a sealed housing (usually a cylinder). The inside of the housing has a UV reflective coating. As air passes through the housing, the UV light strikes air particles and kills pathogens when a threshold is reached.

[0007]

[0007] The current state of the art for aircraft air filtration uses HEPA filters. HEPA filters are very efficient at removing unwanted contaminants and air, but they also greatly reduce the airflow through the system. Also, there are pressure limitations to the HEPA filters at which the system can operate effectively.

[0008]

[0008] Typically, aircraft filtration systems use HEPA filters to filter airborne contaminants and pathogens. HEPA filters significantly restrict airflow through the system. Using a UV air disinfection system can significantly increase airflow through the system.

[0009]

[0009] Typically, HEPA filters are installed in a central location on the aircraft, and as the air leaves the HEPA filter it may combine with localized pathogens. For example, if a passenger sneezes in the lavatory, the exhaled air may contain pathogens with lots of moisture. Now, there is a localized pathogenic condition. Similarly, when passengers use the toilet or flush the toilet, it creates an undesirable odor or foul smell. A central HEPA filter cannot prevent this. Summary of the Invention

[0010]

[0010] The present invention includes an air duct that can be used to disinfect the air inside an enclosed space to remove, kill, destroy or eliminate airborne pathogens. The air duct includes UV light sources or emitters arranged in a pattern around the air interior surface to provide enough energy to kill airborne pathogens in a short period of time, and a UV reflective coating on the inside of the duct. Because UV, rather than HEPA filters, is used to disinfect the air, the air flow in the system can be significantly increased by using a fan that forces an optimal dwell time path. Finally, a fragrance dispenser can be placed at or near the outlet of the air disinfection system to provide a refreshing scent to the clean air. As a result, the present invention creates a disinfection system that is safe for the crew, produces a scent that the crew desires, and can rapidly kill airborne pathogens present in aircraft lavatories that have low power requirements.

[0011]

[0011] In a preferred embodiment, the UV radiator is located on or near the ceiling of the aircraft restroom. The UV radiator is located near the entrance of the restroom, next to a mirror, or above the restroom toilet. The UV radiator includes a cylindrical duct (or other shapes such as polygonal, elliptical, etc.). A UV light source is located on the inner surface of the cylindrical duct. Preferably, the interior of the duct is open and free of any type of intermediate interior items so that air flow and reflectance have optimized performance. However, this is not a limitation. The UV light sources can be arranged in a spiral pattern or other similar pattern to maximize the coverage of the UV light waves within the cylinder. The inner surface of the duct may be coated with a UV reflector. Additionally, a fan may be located within the duct. The fan pushes air through the duct, and the UVC light source irradiates the air particles with UV energy. The UV reflective coating increases the amount of UV energy absorbed by pathogens, destroying them.

[0012]

[0012] In a preferred embodiment, there is an inlet and an outlet to a cylindrical duct. A fragrance dispenser is located at or near the outlet of the duct to add a refreshing scent to the sanitized air. The fragrance dispenser and UV system can be placed side-by-side to reduce the need for additional fans. Sharing sensors, controllers, and other components can reduce the overall weight, complexity, and cost of the combined system.

[0013]

[0013] In another preferred embodiment, there are flow redirection surfaces located opposite the inlet end and outlet end, or at the inlet and outlet, which circulate the air in a spiral manner, increasing residence time and decreasing disinfection time.

[0014]

[0014] In other preferred embodiments, the system can be located in, on, or near the galley to have similar benefits as those described herein with respect to the lavatories.

[0015]

[0015] In another preferred embodiment, the UV may be placed under the mirror in the restroom. In this embodiment, a portion of the cylindrical duct is replaced with a UV transparent lens facing the washbasin. The UV transparent lens allows the UV light waves to exit the cylinder and contact the washbasin surface in the restroom, disinfecting the washbasin surface while also disinfecting the air passing through the UV radiator duct. Again, in this embodiment, an air fragrance dispenser is placed at the outlet of the UV radiator duct to add a refreshing scent to the disinfected air.

[0016] It should be appreciated that this solution can use one or more of the embodiments (a combination of UV radiators placed under the mirror, above the door, and / or near the ceiling of the bathroom).

[0017]

[0017] The use of UV light is one way to destroy pathogens. When a certain amount of UV energy is absorbed by the pathogen, it is destroyed. By applying a UV reflective coating to the inside surface of the air duct to increase the rate at which UV energy is absorbed by the pathogen, more energy is directed towards destroying the pathogen and not wasted as heat. With no objects inside, reflection is highly optimized.

[0018]

[0018] It will be appreciated that there are three distinct functions addressed by the present invention, namely clean air, scented air, and clean surfaces, and that a combination of design elements can address all three, or two, or one of the functions.

[0019]

[0019] One of the key enablers of this invention is the UV reflective coating that can be applied inside the air duct, and the location of the UV light source on the inside surface of the duct. These enablers greatly increase the amount of energy that is directed at airborne pathogens, decreasing the time it takes for the pathogens to be destroyed. The reflective surface also creates a light path in and out of the device. The light path outside the device is used to clean the surface. The faster the pathogens are destroyed, the greater the air flow can be in the system. This reduces the time required to disinfect all of the air in the restroom. The type of reflective surface and the associated percent reflectance have an exponential effect on the intensity.

[0020]

[0020] By combining the airflow over the LED light source with a scent-generating device (e.g., an absorbent cloth filled with scented liquid, see U.S. Patent Application No. 2017 / 0253338, the entire contents of which are incorporated herein by reference) and the airflow over the scent-generating device, and using the scent device upstream of the UV device, a single motor-driven fan can be used, and this airflow can also be used to cool the LEDs.

[0021]

[0021] Multiple sanitization assemblies can also be part of a sanitization system, which communicate wirelessly or wired with each other and / or with a controller that controls the sanitization assemblies and various components such as fans, lights, fragrance dispensers, etc. (e.g., turning fans on and off, adjusting or changing fan speed, turning lights on and off, adjusting or changing light intensity, direction or duration, dispensing fragrance or disinfectant).

[0022]

[0022] It should be understood that LEDs in operation generate heat and can increase the LED temperature. LED reliability and life span are affected by temperature. When using LEDs, product designers must ensure there is sufficient cooling, including convection, radiation, or conduction paths. The need to remove heat from the LEDs (adding weight and complexity) can have undesirable consequences for customers. Therefore, it is beneficial for product design to be able to utilize cooling paths that occur in the surrounding equipment. In a preferred embodiment, the air moving through the duct section is pushed or directed by a fan and has sufficient or possible airflow to cool the LEDs. The air movement is created by the same fan used to push air into the disinfection system. [Brief description of the drawings]

[0023]

[0023] The present invention may be more readily understood with reference to the accompanying drawings. [Figure 1] FIG. 1 is a perspective view of a restroom monument assembly including a plurality of disinfection assemblies according to a preferred embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a portion of a restroom monument assembly. [Diagram 3] FIG. 1 is a cross-sectional perspective view of an inside and outside disinfection assembly. [Figure 4] FIG. 1 is a cross-sectional perspective view of an internal disinfection assembly. [Figure 5A] FIG. 1 is a cross-sectional elevation view of a disinfection assembly including multiple light emitters arranged in a circumferential array. [Figure 5B] FIG. 1 is a cross-sectional elevation view of a disinfection assembly including multiple light emitters arranged in a circumferential array. [Figure 5C] FIG. 1 is a cross-sectional elevation view of a disinfection assembly including multiple light emitters arranged circumferentially. [Figure 5D] FIGURE 2 is a cross-sectional elevation view of a disinfection assembly including a plurality of light emitters arranged in a circumferential array. Like numerals refer to like parts throughout the several views of the drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024]

[0033] The following description and drawings are illustrative and should not be construed as limiting. Many specific details are described to provide a thorough understanding of the disclosure. However, in certain instances, well-known or customary details are not described to avoid obscuring the description. In this disclosure, reference to a certain or one embodiment may refer to the same embodiment, but does not necessarily refer to the same embodiment. Such reference means at least one of the embodiments. If an element is not shown in the drawings, this supports a negative limitation in the claims stating that the element is "not present". However, the above description is not limiting, and elements missing in another embodiment may be included in the claimed embodiment.

[0025]

[0034] Reference herein to "an embodiment," "one embodiment," "a preferred embodiment," or any other phrase referring to the words "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure, and also means that any particular feature, structure, or characteristic described in connection with an embodiment can be included in, or can be omitted or excluded from, any embodiment. Additionally, any particular feature, structure, or characteristic described herein may be optional.

[0026]

[0035] Referring now to the drawings for purposes of illustrating the present invention and not for purposes of limitation, FIGS. 1-5D show a vehicle restroom monument assembly 10 including one or more disinfection assemblies 30 therein. In a preferred embodiment, the restroom monument assembly is utilized in an aircraft. However, any type of vehicle, such as trains, buses, etc., is within the scope of the present invention. As shown in FIG. 1, the restroom monument assembly 10 generally includes an enclosure 12 including a plurality of walls (first wall 14, second wall 16, third wall 18, and fourth wall) (not shown) that cooperate to define a restroom interior 22. The enclosure 12 also preferably includes a floor 24, a ceiling 26, and an entry door 28 disposed on one of the plurality of walls. In the figures, the entry door 28 is shown disposed on the second wall 16. However, this is not a limitation and the door can be disposed on any wall. In a preferred embodiment, the restroom monument assembly 10 includes one or more disinfection assemblies 30 disposed on the restroom interior 22.

[0027]

[0036] FIG. 1 shows three disinfecting assemblies 30 inside, a first disinfecting assembly 30 below the mirror 32 and above the sink 34, a second disinfecting assembly 30 above the third wall next to the mirror 32, and a third disinfecting assembly 30 above the door 28. Any number of disinfecting assemblies in the restroom is within the scope of the present invention. FIG. 1 also shows two different types of disinfecting assemblies 30. The first type of disinfecting assembly 30 (see FIGS. 2 and 3), located above the sink, is also referred to herein generally as an interior / exterior disinfecting assembly and is numbered 30a. The second type of disinfecting assembly 30 (see FIG. 4), is also referred to herein as an interior disinfecting assembly and is numbered 30b. Thus, the disinfecting assemblies are generally labeled / numbered 30, the interior / exterior disinfecting assemblies are specifically labeled / numbered 30a, and the interior disinfecting assemblies are specifically labeled / numbered 30b.

[0028]

[0037] As shown in Figures 3 and 4, the disinfection assembly 30 includes a duct section 36 including an inner surface 38 defining a duct interior 40, an inlet 42, an outlet 44, and an air path (see arrow P1) extending from the inlet 42 through the duct interior 40 to the outlet 44. In a preferred embodiment, a fan 46 is positioned to draw air in through the inlet 42 and exhaust air through the outlet 44. The fan 46 or other air moving components can be positioned inside the duct or outside the duct with respect to the duct section. In a preferred embodiment, the disinfection assembly 30 includes an air disinfection light system 48 including one or more disinfection luminaries 50 positioned in the duct interior 40 between the inlet and the outlet. As described herein, the disinfection luminaries 50 can be UV light, LEDs, or any type of light emitting device that emits light at a wavelength that disinfects, kills, or destroys pathogens, etc. Preferably, a reflective coating 52 (see Figures 5A-5D) is positioned on at least a portion of the inner surface 38 of the duct.

[0029]

[0038] As shown in FIG. 2, in a preferred embodiment, the interior / exterior sanitizing assembly 30a is disposed between the sink 34 and the mirror 32. Preferably, the sink 34 includes a backsplash 54, and the interior / exterior sanitizing assembly 30a is disposed between the top of the backsplash 54 and below the bottom of the mirror 32. In a preferred embodiment, the duct portion 36 of the interior / exterior sanitizing assembly 30a includes a transparent portion 56 defined therein. For example, the transparent portion 56 can be a transparent cover or lens secured or disposed in an opening defined in the duct portion 36. It should be understood that the transparent portion 56 allows a portion of the light emitted from the sanitizing luminous body 50 to pass through the transparent portion and pass to the outside of the duct portion or sanitizing assembly, so that the light can sanitize the outside or external components of the sanitizing assembly, the air, or the like. As shown in FIG. 3, in a preferred embodiment, a particular sanitizing luminous body 50 can be disposed such that the light emitted therefrom is directed through the transparent portion 56. These sanitizing light members 50 may be referred to herein as an exterior sanitizing light system 58. As shown in Figure 2, in a preferred embodiment, the inlet 42 and / or fan 46 extend outwardly further than the exterior side of the sink and mirror. One skilled in the art will appreciate that the first wall of the restroom monument assembly 10 is configured to be positioned against a wall of the aircraft (i.e., outwardly from the second wall). The disinfection assembly 30 preferably includes a power source, such as a wired connection to electricity or a battery, for powering the lights, fans, etc.

[0030]

[0039] In the embodiment shown in Figures 1 and 2, the light directed through the transparent portion 56 is directed at the sink and surfaces thereon (e.g., faucet, counter, dispenser, sink bowl, etc.) to sanitize those surfaces. Thus, the interior / exterior sanitizing assembly 30a helps sanitize the air inside the restroom by moving air through the ducting portion, and also aids in sanitizing surfaces on or near the sink. It will be appreciated that the exterior sanitizing illuminator that directs light through the transparent portion will also sanitize some of the air inside the ducting. The interior / exterior sanitizing assembly 30a can also be placed in other locations such as above the toilet or above door handles to sanitize other surfaces.

[0031]

[0040] In a preferred embodiment, the sanitization assembly 30 may also include a fragrance dispenser disposed in the air path at any point between the inlet 42 and the outlet 44. Figure 3 shows a fragrance dispenser 60 embodied as an absorbent fabric through which at least a portion of the air moving along the air path P1 moves, although any type of fragrance dispenser or component for imparting a scent to the exiting air is within the scope of the present invention.

[0032]

[0041] As shown in Figure 4, in a preferred embodiment, the interior sanitization assembly 30b includes a mounting member 62 including a body portion 64 that can be connected or attached to a surface, such as a wall, and first and second bracket members 66 extending from and / or attached to the body portion 64. The first and second bracket members 66 each include an opening 68 defined therein or therethrough, and the duct portion 36 extends between and through the openings 68. A transparent member or portion can also be added to the sanitization assembly 30b shown in Figure 4.

[0033]

[0042] As shown in Figures 5A-5D, in preferred embodiments, any or all of the disinfecting luminaries 50 (internal air or external disinfecting luminous members) may be arranged in various patterns and / or in one or more arrays around the interior or inner surface 38 of the duct section 30. Preferably, the duct section 30 also includes a UV reflective coating 52 on the inside of the duct to reflect light waves within the duct interior 40 through which the air flows, helping to provide sufficient energy to kill airborne pathogens within a desired or predetermined time period as the air path P1 extends. For example, as shown in Figures 5A-5D, the air disinfecting luminous system 48 in any of the disinfecting assemblies 30, 30a or 30b may include multiple disinfecting luminaries 50 arranged circumferentially around the inner surface of the duct section. Figure 4 shows the disinfecting luminaries 50 in a spiral pattern or array. It should be understood that in embodiments in which the duct section or its inner surface is not circular, the disinfecting luminaries 50 can still be arranged circumferentially, meaning that they are arranged around or around the inner surface.

[0034]

[0043] As shown in FIG. 5A, the inner surface 38 of the duct section 36 defines a radius R1 that in one embodiment extends from the inner surface to the center of a circle, the duct section being circular or cylindrical. It should be understood that the axis of the duct section extends along the center of the duct section. Thus, in one embodiment, if the duct section or its inner surface is not circular, the radius or line R1 extends from the inner surface to the axis of the duct section. The air disinfecting luminaries 50 in the array can be positioned to direct all light parallel to the radius R1 or along the radius R1 (or radially inward) as shown in FIGS. 5A and 5B. In FIGS. 5A and 5B, each luminary 50 includes a plurality or set of lines extending therefrom that represent light or rays that radiate or emanate from the luminary. The set of lines includes a center line or arrow labeled D1 that represents the angle at which direct light is emitted from the luminary. As shown in FIGS. 5A and 5B, the line D1 is coincident with and / or parallel to the radius. R1 indicates that the light is directed along a radius R1 and toward the axis of the duct section or interior of the duct.

[0035]

[0044] In another embodiment, the air disinfection luminaries in the array can be positioned with all direct light at a non-zero angle θ (non-parallel or any angle between 1° and 89°) to the radius R1, as shown in Figures 5C and 5D. In other words, as shown in Figures 5C and 5D, a direct arrow or line D1 is angled to the radius R1 to indicate that the light is directed at a non-zero angle θ (non-parallel) to the radius R1. The line D1 is also shown in Figures 5C and 5D as a reflection of the reflective coating 52. The reflective coating can cover the entire inner surface of the duct section and can be placed in multiple locations in a given area to strategically reflect light from the various luminaries.

[0036]

[0045] In another embodiment, some of the air disinfecting luminaries 50 may be positioned to direct light parallel to the radius, while other air disinfecting luminaries 50 in the same array may be positioned to direct light at a non-zero angle.

[0037]

[0046] The above detailed description of the embodiments of the present disclosure is not intended to be exhaustive or to limit the teachings to the precise form disclosed above. Although specific embodiments and examples of the present disclosure have been described above for illustrative purposes, various equivalent modifications are possible within the scope of the present disclosure as will be recognized by those skilled in the relevant art. Furthermore, any specific numerical values ​​described herein are merely examples and are not limiting. Alternative implementations may employ different values, measurements or ranges.

[0038]

[0047] The above mentioned patents and applications and other references, including those that may be listed in accompanying application papers, are incorporated herein by reference in their entirety.

Claims

1. an enclosure including a plurality of walls that cooperate to define a restroom interior, with an entry door disposed in one of the walls; a disinfection assembly disposed within the restroom, the disinfection assembly including: an inner surface defining a duct interior; an inlet; an outlet; and a duct portion including an air path extending from the inlet through the duct interior to the outlet; a fan positioned to draw air in through the inlet and exhaust air through the outlet; an air disinfecting light system including at least a first air disinfecting luminous element disposed within the duct between the inlet and the outlet; and a reflective coating disposed on at least a portion of the inner surface. A washstand disposed inside the restroom; Equipped with the air disinfecting light system includes a plurality of air disinfecting lights arranged in a first circumferential array around the interior surface of the duct segment; 10. A vehicle restroom monument assembly, wherein the disinfection assembly is positioned above the washbasin, the duct portion includes a transparent portion defined therein, and an exterior disinfection lighting system including at least a first exterior disinfection luminaire is positioned inside the duct, the first exterior disinfection luminaire being positioned to direct light to an exterior of the duct portion through the transparent portion.

2. 10. The vehicle restroom monument assembly of claim 1, further comprising a fragrance dispenser disposed in the air path between the inlet and the outlet.

3. 2. The vehicle restroom monument assembly of claim 1, wherein the inner surface of the duct portion defines a radius, and the air disinfecting luminaries in the first circumferential array are positioned to direct light radially inward.

4. 10. The vehicle restroom monument assembly of claim 1, wherein the air disinfecting luminaries in the first circumferential array are positioned to direct light at a non-zero angle relative to the radius.

5. 10. The vehicle restroom monument assembly of claim 1, wherein the air disinfecting lights in the first circumferential array are arranged in a spiral.

6. 2. The vehicle toilet monument assembly of claim 1, wherein the sanitizing assembly includes a body portion and first and second bracket members coupled to the body portion, the first and second bracket members each including an opening defined therethrough, and the duct portion extends through the openings in the first and second bracket members.

7. 10. The vehicle restroom monument assembly of claim 1, wherein the air moving within the duct cools the first disinfecting luminous object.

8. 3. The vehicle restroom monument assembly of claim 2, wherein the fragrance dispenser is disposed in the air path between the inlet and the transparent portion.

9. 3. The vehicle restroom monument assembly of claim 2, wherein the fragrance dispenser is positioned within the air path and adjacent the inlet.

10. 3. The vehicle restroom monument assembly of claim 2, wherein the fragrance dispenser is positioned within the air path and adjacent the outlet.

11. 1. A vehicle restroom monument assembly, comprising: an enclosure including a plurality of walls cooperating to define a restroom interior, wherein an entry door is disposed on one of the walls, a sink is disposed on one of the walls, the sink includes a backsplash, and a mirror is disposed above the sink; a first disinfection assembly disposed between the mirror and the backsplash, a duct section including an interior surface defining a duct interior, an inlet, an outlet, and an air path extending from the inlet through the duct interior and to the outlet, wherein a fan is positioned to draw air in through the inlet and exhaust the air through the outlet, the duct section including a transparent portion defined between the inlet and the outlet, a reflective coating disposed on at least a portion of the interior surface; an air disinfecting lighting system comprising a plurality of air disinfecting luminaries arranged in a first circumferential array around the inner surface of the duct portion disposed within the duct between the inlet and the transparent portion, wherein the air moving through the duct interior cools the first disinfecting luminaries; an external disinfecting light system including a plurality of external disinfecting luminaires disposed within the duct and arranged to direct light to the sink through the transparent portion; a fragrance dispenser disposed in the air path between the transparent portion and the outlet; a first disinfection assembly comprising: A vehicle restroom monument assembly comprising:

12. 12. The vehicle restroom monument assembly of claim 11, further comprising: a second disinfection assembly disposed inside the restroom, the second disinfection assembly including a duct section including an interior surface defining a duct interior, an inlet, an outlet, and an air path extending from the inlet through the duct interior and to the outlet, wherein a reflective coating is disposed on at least a portion of the interior surface, an air disinfecting light system including a plurality of air disinfecting luminaries arranged in a first circumferential array around the interior surface of the duct section disposed inside the duct between the inlet and the outlet, and a fragrance dispenser disposed in the air path between the transparent portion and the outlet.

13. 13. The vehicle restroom monument assembly of claim 12, wherein the vanity counter includes an exterior side, the mirror includes an exterior side, and the outlet and the fan are disposed outside of the exterior side.

14. a duct portion including an interior surface defining a duct interior, an inlet, an outlet, and an air path extending from the inlet through the duct interior to the outlet; a fan positioned to draw air in through the inlet and exhaust the air through the outlet; an air disinfecting light system including at least a first air disinfecting light emitter disposed within the duct between the inlet and the outlet; a reflective coating disposed on at least a portion of the interior surface; Equipped with the air disinfecting light system includes a plurality of air disinfecting lights arranged in a first circumferential array around the interior surface of the duct segment; 10. A disinfection assembly, wherein the duct portion includes a transparent portion defined therein, and wherein the external disinfecting lighting system includes at least a first external disinfecting illuminant disposed within the duct, the first external disinfecting illuminant positioned to direct light to an exterior of the duct portion through the transparent portion.

15. 15. The disinfection assembly of claim 14, wherein the air moving through the interior of the duct cools the air disinfecting luminous element.

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