Electromagnetic interference reduction system and method for ultraviolet lamp assemblies
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- THE BOEING CO
- Filing Date
- 2022-05-10
- Publication Date
- 2026-08-04
Smart Images
Figure 0007900182000001 
Figure 0007900182000002 
Figure 0007900182000003
Abstract
Description
Technical Field
[0001] Examples of the present disclosure generally relate to systems and methods for reducing (e.g., suppressing) electromagnetic interference (EMI) associated with ultraviolet (UV) lamp assemblies.
Background Art
[0002] Vehicles such as commercial aircraft are used for transporting passengers between various locations. For example, systems are currently being developed for disinfecting or otherwise sterilizing surfaces within an aircraft using ultraviolet (UV) light.
[0003] For example, a UV sterilization system includes a UV lamp assembly having a UV light emitting element such as an excimer lamp. During operation, the excimer lamp generates EMI. In an aircraft or other EMI-sensitive vehicle, a Faraday cage can be used, in particular, to suppress EMI.
[0004] However, the light exit (window, aperture, etc.) of the UV lamp assembly needs to be as open as possible to allow as much UV light as possible to pass through. As can be understood, a Faraday cage disposed at the light exit blocks a portion of the UV light.
[0005] Known EMI reduction covers for UV lamp assemblies typically include a round wire mesh or a flat-cut grid. However, in either case, the UV light that collides with the wire mesh or grid is reflected back towards the UV light source, thereby reducing the amount of UV light coming out of the UV lamp assembly.
Summary of the Invention
Problems to be Solved by the Invention
[0006] Systems and methods are needed to reduce EMI associated with UV lamp assemblies. Furthermore, systems and methods are needed to reduce EMI while allowing a considerable amount of UV light (e.g., as much UV light as possible) to pass through from the UV lamp assemblies. [Means for solving the problem]
[0007] With these needs in mind, a particular example provides an electromagnetic interference (EMI) reduction cover configured to couple to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing. The EMI reduction cover includes one or more grids with multiple structural beams defining multiple light apertures. The multiple light apertures facilitate the passage of UV light emitted from the UV light source. The EMI reduction cover includes at least 90 percent open space relative to the multiple structural beams. In at least one example, the EMI reduction cover is not configured to couple directly to the UV light source.
[0008] In at least one example, multiple structural beams are formed from reflective material.
[0009] In at least one example, the pitch of the EMI reduction covers is 0.3 inches or less, and the thickness of each beam is 0.02 inches or less. For example, the pitch of the EMI reduction covers is 0.2935 inches, and the thickness of each beam is 0.01 inches.
[0010] In at least one example, the ratio of the pitch of the EMI reduction cover to the thickness of each beam is at least 15:1. For example, the ratio of the pitch of the EMI reduction cover to the thickness of each beam is 29.35:1. In another example, the ratio of the pitch of the EMI reduction cover to the thickness of each beam is 30:1.
[0011] In at least one example, the EMI reduction cover further includes an outer frame. Multiple structural beams and multiple optical apertures are positioned inward from the outer frame. The outer frame is configured to be fixed to the housing.
[0012] In at least one example, the beam includes at least one surface that traverses the direction of UV light emitted from a UV light source. For example, at least one surface is configured to face the UV light source, and at least one surface includes a reflective material that facilitates the reflection of at least a portion of the UV light passing through one or more light apertures. In a further example, at least one surface includes two surfaces that traverse the direction of UV light emitted from a UV light source. As an example, the multiple structural beams further include a blunt surface connected to at least one surface. As an example, the multiple structural beams have an axial cross-section of a triangular shape.
[0013] In at least one example, one or more substrates are coupled to one or more grids. One or more substrates are substantially transparent to UV light.
[0014] In at least one example, one or more grids include an internal grid and an external grid. For example, the external grids are staggered relative to the internal grids, and vice versa. For instance, the beams of the internal grid are closer to the longitudinal axis of the UV light source than the beams of the external grid. In at least one example, the beams of the external grid are not directly above or below the beams of the internal grid. For example, the beams of the external grid are in the shadows cast by the beams of the internal grid when the UV light source emits UV light.
[0015] In at least one example, multiple light apertures are sized based on the frequency of UV light emitted from a UV light source.
[0016] A particular example of this disclosure provides an electromagnetic interference (EMI) reduction cover configured to be coupled to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing. The EMI reduction cover includes one or more grids, each containing a plurality of structural beams defining a plurality of light apertures. The plurality of light apertures facilitate the passage of UV light emitted from the UV light source. The beams include at least one surface that traverses the direction of the UV light emitted from the UV light source.
[0017] A particular example of this disclosure provides an electromagnetic interference (EMI) reduction cover configured to be coupled to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing. The EMI reduction cover includes an internal grid and an external grid. The internal and external grids include a plurality of structural beams defining a plurality of light apertures. The plurality of light apertures facilitate the passage of UV light emitted from the UV light source. [Brief explanation of the drawing]
[0018] [Figure 1] This is a schematic block diagram of a UV light sterilization system. [Figure 2] This is a plan view of a portion of the EMI reduction cover. [Figure 3] This is a first side view of the UV lamp assembly. [Figure 4] This is a top view of the EMI reduction cover. [Figure 5] This is a perspective view of a UV light sterilization system. [Figure 6] This is an axial cross-sectional view of the beam of the EMI reduction cover. [Figure 7] This is a side view of the device used to form the surface of the beam for the EMI reduction cover. [Figure 8] This is an end view of the EMI reduction cover. [Figure 9] This is an end view of the EMI reduction cover. [Figure 10] This is an axial cross-sectional view of the beam of the EMI reduction cover. [Figure 11]It is a front perspective view of an aircraft. [Figure 12A] It is a plan view of the interior cabin of an aircraft. [Figure 12B] It is a plan view of the interior cabin of an aircraft. [Figure 13] It is an interior perspective view of the interior cabin of an aircraft.
Modes for Carrying Out the Invention
[0019] The foregoing summary, as well as the following detailed description of specific examples, will be better understood when read in conjunction with the accompanying drawings. In this specification, elements or steps described in the singular and preceded by the word "a" or "an" should not necessarily be construed as excluding a plurality of elements or steps. Further, references to "an example" are not intended to be construed as excluding the existence of additional examples incorporating the described form. Also, unless explicitly stated otherwise, examples that "comprise" or "have" one or more elements with a particular condition can include additional elements that do not have that condition.
[0020] As described herein, examples of the present disclosure provide an EMI reduction cover for a UV lamp assembly. The EMI reduction cover is attached to the UV lamp assembly. For example, the EMI reduction cover is attached to a housing that includes one or more UV light emitting elements. In at least one example, the EMI reduction cover is not directly attached or separately fixed to one or more UV light emitting elements. The EMI reduction cover includes a plurality of intersecting beams that form a grid that is as open as possible, configured to suppress EMI generated by one or more UV light emitting elements, and (in contrast to being reflected towards the one or more UV light emitting elements) also configured to maximize or otherwise increase the amount of UV light exiting the window of the UV lamp assembly.
[0021] A particular example of this disclosure provides a UV light sterilization system including an EMI reduction cover fixed to the housing of a UV lamp assembly. The EMI reduction cover includes one or more metal EMI grids, which are sized and shaped to maximize or separately increase the passage of UV light and minimize or separately reduce EMI. One or more grids include a plurality of intersecting beams (ribs, wires, etc.). The beams are relatively thin and spaced apart from one another. In at least one example, the ribs have triangular cross-sectional areas having two cross-sections facing the light source to facilitate outward reflection toward the target disinfection area. The EMI reduction cover may be formed from a reflective material such as a metal such as copper or aluminum. In at least one other example, the EMI reduction cover includes two more grids stacked and staggered so that the outer grids shadow the inner grids.
[0022] A particular example of this disclosure provides a method for fabricating an EMI reduction cover. The method includes the step of angling a waterjet device with respect to ribs to form a surface that reflects UV light away from a UV light source.
[0023] An example of the present disclosure provides an EMI grid that reduces (e.g., suppresses) EMI generated by a UV light source while increasing UV light irradiance through an EMI reduction cover to efficiently disinfect a target area / surface with less power.
[0024] Figure 1 shows a schematic block diagram of a UV light sterilization system 100 according to an example of the present disclosure. The UV light sterilization system 100 is configured to sterilize one or more parts of an environment (such as a surface or a fluid such as air). The environment may be the passenger compartment of a vehicle such as an aircraft. The UV light sterilization system 100 can also be used in a variety of other environments, such as enclosed spaces (such as inside a residential or commercial building) or outdoor venues (such as a stadium).
[0025] The UV light sterilization system 100 includes a UV lamp assembly 102 and an electromagnetic interference (EMI) reduction cover 104 coupled to the UV lamp assembly 102. The UV lamp assembly 102 includes a housing 106 that holds a UV light source 108 configured to emit UV light 110 from a light outlet 112. For example, the UV light source 108 is one or more UV light-emitting elements, such as a UV bulb like an excimer bulb, or one or more UV light-emitting diodes (LEDs), or otherwise includes these. The light outlet 112 is an opening, a window (such as an open outlet or a UV-transmitting glass panel), or otherwise includes these.
[0026] In at least one example, the UV light source 108 includes one or more UV light-emitting elements, which may include one or more electrodes. The UV light source 108 may also include a transparent (such as glass) housing surrounding one or more electrodes. The UV light source 108 may also include a grid, etc., surrounding and / or embedded in the transparent housing.
[0027] The EMI reduction cover 104 is coupled to the housing 106 and positioned in and / or above at least a portion of the light outlet 112. For example, the EMI reduction cover 104 extends across the entire light outlet 112. In another example, the EMI reduction cover 104 is positioned in, above, and / or below the light outlet 112. The EMI reduction cover 104 can be fixed to the outer periphery, edge, etc., of the housing 106 that defines at least a portion of the light outlet 112. In at least one example, the EMI reduction cover 104 is not fixed directly to or separately to the UV light source 108.
[0028] The EMI reduction cover 104 includes one or more grids 114. One or more grids 114 include multiple structural beams 116, such as a mesh of intersecting beams 116. Examples of beams 116 include ribs, wires, etc. Multiple light apertures 118 are defined between the beams 116. The light apertures 118 provide open areas through which UV light emitted from the UV light source 108 passes.
[0029] In at least one example, the EMI reduction cover 104 may be a mesh screen including multiple longitudinal beams 116 that intersect with multiple orthogonal intersecting beams 116, thereby forming multiple optical apertures 118 between them. In at least one example, the EMI reduction cover 104 is a metal sheet (formed from aluminum, copper, or stainless steel, etc.) that has been punched, waterjet cut, or laser cut, with apertures (i.e., optical apertures 118) formed therein. For example, aluminum reflects approximately 65% of UV light having a wavelength of 222 nanometers (nm). For example, copper reflects approximately 60% of UV light having a wavelength of 222 nm.
[0030] During operation, the EMI reduction cover 104 reduces EMI generated by the UV light source 108 while allowing UV light 110 emitted from the UV light source 108 to pass through the light outlet 112 and the light aperture 118 away from the UV light source 108. That is, the light aperture 118 allows UV light to exit the UV light sterilization system 100, and the beam 116 is sized and shaped to minimize or separately reduce the reflection of UV light 110 returning to the UV light source 108.
[0031] In at least one example, the EMI reduction cover 104 includes at least 90% open space relative to a plurality of structural beams 116. That is, the optical aperture 118 provides at least 90% of the EMI reduction cover 104, and the structural beams 116 provide 10% or less of the EMI reduction cover 104. In a further example, the optical aperture 118 forms at least 94% of the EMI reduction cover 104.
[0032] The UV light source 108 may be configured to emit UV light 110 in the far-UV spectrum, such as 222 nm. As another example, the UV light source 108 may be configured to emit UV light 110 in the UVC spectrum, such as 254 nm. Optionally, the UV light source 108 may be configured to emit UV light 110 at other wavelengths.
[0033] The UV lamp assembly 102 can be fixed in place. For example, the UV lamp assembly 102 can be fixed and mounted on a wall, ceiling, cabinet, etc. Optionally, the UV lamp assembly 102 may be movable. For example, the lamp 102 can be fixed to a structure and configured to swivel, rotate, or perform joint movements. As another example, the UV lamp assembly 102 may be part of a portable device, such as being housed in a wand assembly that can be coupled to a backpack assembly, case assembly, cart assembly, etc.
[0034] Figure 2 shows a partial plan view of an EMI reduction cover 104 according to an example of the present disclosure. Referring to Figures 1 and 2, in at least one example, the EMI reduction cover 104 includes a grid 114 having a plurality of beams 116a (such as intersecting beams) that intersect with a plurality of orthogonal intersecting beams 116b, thereby forming a plurality of light apertures 118 between them. The pitch 120 of the EMI reduction cover 104 is defined between three beams 116a and three beams 116b.
[0035] In at least one example, the pitch 120 of the EMI reduction cover 104 is 0.3'' (inches) or less. For example, the pitch 120 is 0.2935''. The thickness 122 of each beam 116a and 116b is less than 0.02''. For example, the thickness is 0.01''. Thus, the EMI grid 114 is more than 90% open. That is, the light aperture 118 provides at least 90% of the EMI grid 114. For example, the EMI grid 114 is at least 94% open.
[0036] It should be understood that the examples of pitch 120 and thickness 122 are merely illustrative. The pitch 120 may be greater or less than 0.3'', and the thickness 122 may be greater or less than 0.02''.
[0037] In at least one example, the ratio of the pitch 120 to the thickness 122 of beams 116a and 116b is 15:1. In a further example, the ratio of the pitch 120 to the thickness 122 of beams 116a and 116b is 30:1. In yet another example, the ratio of the pitch 120 is 29.35:1. An EMI reduction cover 104 having beams 116a and 116b with a thickness 122 of 0.01'' and a pitch of 0.2935'' was found to increase the UV light transmission of the resulting light aperture 118 by at least 15% on a grid with a beam thickness of 0.3'' while simultaneously suppressing EMI generated by the UV light source 108.
[0038] Examples of the disclosure, including an EMI reduction cover 104 having beams 116 of the size and shape described herein, have been found to exceed the EMI requirements specified by the Federal Aviation Administration (FAA). Specifically, an EMI reduction cover 104 having a pitch 120 to thickness 122 ratio as described herein provides sufficient EMI suppression to fall below the upper limit of such requirements.
[0039] In addition, the EMI reduction cover 104 provides a barrier that safely protects the UV light source 108. The EMI reduction cover 104 is interposed between the UV light source 108 and external forces (such as an individual gripping the system 100), and therefore prevents or separately reduces the possibility of damage to the UV light source 108. Furthermore, the EMI reduction cover 104 provides a barrier against the UV light source 108 being touched (for example, finger oil can absorb 222 nm light).
[0040] In at least one example, the optical apertures 118 are sized based on the frequency of UV light 110 emitted from the UV light source 108. For example, the optical apertures 118 may be sized and shaped to allow the passage of UV light 110 in the far-UV spectrum, such as 222 nm. In another example, the optical apertures 118 may be sized and shaped to allow the passage of UV light 110 in the UVC spectrum, such as 254 nm. As an example, the beam 116 may be sized and shaped to suppress EMI having a first wavelength but increase the passage of UV light at a second wavelength shorter than the first wavelength.
[0041] Figure 3 shows a first side view (such as a bottom or top view) of a UV lamp assembly 102 according to an example of the present disclosure. The UV lamp assembly 102 includes a housing 106 that holds a UV light source 108, such as a plurality of UV light-emitting elements 200 configured to emit UV light through an optical outlet 112, such as an aperture. As shown, the UV lamp assembly 102 includes a first plurality of UV light-emitting elements 200a and a second plurality of UV light-emitting elements 200b. The first plurality of UV light-emitting elements 200a are housed in a first sub-housing 202, and the second plurality of UV light-emitting elements 200b are housed in a second sub-housing 204, distinct from the first sub-housing 202. Each of the first sub-housing 202 and the second sub-housing 204 may house more or fewer UV light-emitting elements 200 than those shown. Optionally, the UV lamp assembly 102 may include a single sub-housing that holds all of the UV light-emitting elements 200. In at least one example, the UV lamp assembly 102 may include a single UV light-emitting element 200 instead of multiple UV light-emitting elements 200. The UV lamp assembly 102 shown in Figure 3 is merely an example. The UV lamp assembly 102 may be of a different size and shape than that shown in Figure 3.
[0042] Figure 4 shows a top view of an EMI reduction cover 104 according to an example of the present disclosure. Figure 5 shows a perspective view of a UV light sterilization system 100 according to an example of the present disclosure. Referring to Figures 1 to 5, in at least one example, the EMI reduction cover 104 includes an outer frame 105. The beam 116 and the light opening 118 are positioned inward from the outer frame 105. The outer frame 105 is configured to be fixed to the housing 106, such as being close to the light outlet 112.
[0043] Figure 6 shows an axial cross-sectional view of a beam 116 of an EMI reduction cover 104 according to an example of the present disclosure. As shown, the beam 116 may have a shape having at least one surface 300 that traverses the direction A of UV light 110 emitted from a UV light source 108. For example, the beam 116 may have an axial cross-section of a triangle 302 having two sides with surfaces 300 that intersect at the vertex 304 closest to the UV light source 108. The distal side 306 is away from the vertex 304 and the UV light source 108. The distal side 306 may be perpendicular to direction A, but the surfaces 300 forming the other sides may be perpendicular to direction A.
[0044] In at least one example, at least one surface 300 is configured to face the UV light source 108. One or more surfaces 300 include a reflective material that facilitates the reflection of at least a portion of the UV light 110 passing through one or more light apertures 118. As shown in Figure 6, for example, two surfaces 300 traverse direction A of the UV light 110 emitted from the UV light source 108.
[0045] The UV light 110 is reflected by the surface 300 away from the UV light source 108. In this way, the UV light 110 is not reflected back to the UV light source 108. Instead of being reflected back towards the UV light source 108, the inclined surface of the surface 300 reflects the UV light 110 emitted from the UV light source 108 into the light aperture 118.
[0046] As shown in the figure, the beam 116 may have an axial cross-section in the form of an equilateral triangle. Optionally, the beam 116 may have an axial cross-section in the form of a right triangle. As another example, the beam 116 may have an axial cross-section in the form of an isosceles triangle. As yet another example, the beam 116 may have an axial cross-section in the form of a trapezoid, or any other shape having at least one surface 300 that traverses direction A (but is not perpendicular to direction A).
[0047] An EMI reduction cover 104 having beams 116 shaped as illustrated and described with reference to Figure 6 allows more UV light reflection into the light aperture 118. Furthermore, such an EMI reduction cover 104 is more robust than a grid with ultrathin ribs. In addition, the flat edges 306 provide a blunt surface. Thus, an exposed blunt surface is less likely to injure an individual touching it, in contrast to gripping a very thin surface that could be sharp.
[0048] In at least one example, the beam 116 is sized and spaced relative to the EMI reduction cover 104 as described with respect to Figures 1 and 2. Optionally, the beam 116 may be sized and spaced differently than those described with respect to Figures 1 and 2.
[0049] Figure 7 shows a side view of an apparatus 400 for forming the surface of a beam of an EMI reduction cover, according to an example of the present disclosure. The apparatus 400 may be a laser that radiates laser energy onto the beam 116 to form the surface 300. In another example, the apparatus 400 may be a water jet that discharges pressurized water onto the beam 116 to form the surface 300.
[0050] The shape of the beam 116 is formed by angling the device 400 during each cut of the beam 116. For example, the device 400 provides an inclined surface on a metal substrate made of aluminum or copper.
[0051] Figure 8 shows an end view of an EMI reduction cover 104 according to an example of the present disclosure. In this example, a grid 114 including beams 116 is supported on a substrate 500. The substrate 500 transmits or substantially transmits UV light. For example, the substrate 500 is a glass panel that transmits 99.95% of UV light.
[0052] The grid 114 can be bonded to the substrate 500. Alternatively, the grid 114 can be printed onto the substrate 500. Alternatively, the grid 114 can be etched onto the substrate 500. Alternatively, the grid 114 can be vapor-deposited onto the substrate 500.
[0053] Figure 9 shows an end view of an EMI reduction cover 104 according to an example of the present disclosure. In this example, the grid 114 is sandwiched between a first substrate 500a and a second substrate 500b.
[0054] Referring to Figures 8 and 9, one or more substrates 500 provide structural support and rigidity to the EMI reduction cover 104. Optionally, the EMI reduction cover 104 may not include any substrates.
[0055] In at least one example, the beam 116 is sized and spaced relative to the EMI reduction cover 104 as described with respect to Figures 1 and 2. Optionally, the beam 116 may be sized and spaced differently than those described with respect to Figures 1 and 2.
[0056] Figure 10 shows an axial cross-sectional view of a beam of an EMI reduction cover 104 according to an example of the present disclosure. In at least one example, the EMI reduction cover 104 includes an internal grid 114a and an external grid 114b of the beam 116. The beam 116 may be sized, molded, and constructed as described with respect to Figures 1 to 9.
[0057] The internal grid 114a is closer to the UV light source 108 than the external grid 114b. The beams 116 of the internal grid 114a are staggered relative to the beams 116 of the external grid 114b, and vice versa. For example, the beams 116 of the internal grid 114a are closer to the longitudinal axis 600 of the UV light source 108 than the beams 116 of the external grid 114b. The beams 116 of the external grid 114b are not directly above or below the beams 116 of the internal grid 114a. Instead, the beams 116 of the external grid 114b are further radially outward than the beams 116 of the internal grid 114a. In at least one example, the beams 116 of the external grid 114b are in the shadow formed by the beams 116 of the internal grid 114a when the UV light source 108 emits UV light 110.
[0058] In at least one example, the beam 116 is sized and spaced relative to the EMI reduction cover 104 as described with respect to Figures 1 and 2. Optionally, the beam 116 may be sized and spaced differently than those described with respect to Figures 1 and 2.
[0059] The internal grid 114a is separated from the external grid 114a by a distance of 610. For example, the distance 610 may be between 0.001'' and 0.25''. Optionally, the distance may be less than 0.001'' or greater than 0.25''.
[0060] The optical aperture 118 between the beam 116 of the outer grid 114b and the beam 116 of the inner grid 114a can be sized and shaped based on the frequency or wavelength of the UV light 110 emitted from the UV light source 108. For example, the optical aperture 118 may be sized and shaped to allow the passage of UV light 110 in the far-UV spectrum, such as 222 nm. Alternatively, the optical aperture 118 may be sized and shaped to allow the passage of UV light 110 in the UVC spectrum, such as 254 nm. As an example, the beam 116 may be sized and shaped to suppress EMI with a first wavelength but increase the passage of UV light at a second wavelength shorter than the first wavelength.
[0061] Figure 11 shows a front perspective view of an aircraft 710 according to an example of the present disclosure. The aircraft 710 includes, for example, a propulsion system 712 including engines 714. Optionally, the propulsion system 712 may include more engines 714 than shown. The engines 714 are supported by the wings 716 of the aircraft 710. In another example, the engines 714 may be supported by the fuselage 718 and / or tail section 720. The tail section 720 may also support a horizontal stabilizer 722 and a vertical stabilizer 724.
[0062] The 718th fuselage of the aircraft 710 defines the interior cabin 730, which includes the flight deck or cockpit, one or more work areas (e.g., galley, carry-on baggage area for crew), one or more passenger sections (e.g., first class, business class, and coach class sections), one or more toilets, etc.
[0063] Examples of the present disclosure illustrated and described with respect to Figures 1 to 10 can be used, for example, in the interior cabin of an aircraft 710. Alternatively, the examples of the present disclosure may be used instead of an aircraft in various other vehicles such as automobiles, buses, locomotives and train cars, ships, etc. Furthermore, the examples of the present disclosure may be used for fixed structures such as commercial or residential buildings, for example.
[0064] Figure 12A shows a plan view of an aircraft interior cabin 730 according to an example of the present disclosure. The interior cabin 730 may be located within the fuselage 732 of an aircraft such as the fuselage 718 in Figure 11. For example, one or more fuselage walls may define the interior cabin 730. The interior cabin 730 includes several compartments, including a forward compartment 733, a first-class compartment 734, a business-class compartment 736, a forward galley station 738, an extended economy or coach compartment 740, a standard economy or coach compartment 742, and a rear compartment 744, which may include several toilets and galley stations. It should be understood that the interior cabin 730 may include more or fewer compartments than those shown. For example, the interior cabin 730 may not include a first-class compartment and may include more or fewer galley stations than those shown. Each compartment may be separated by a cabin transition area 746, which may include a class partition assembly between aisles 748.
[0065] As shown in Figure 12A, the interior passenger compartment 730 includes two passages 750 and 752 leading to the aft compartment 744. Optionally, the interior passenger compartment 730 may have more or fewer passages than those shown. For example, the interior passenger compartment 730 may include a single passage extending through the center of the interior passenger compartment 730 leading to the aft compartment 744.
[0066] Passageways 748, 750, and 752 extend to an exit passage or door passage 760. An exit door 762 is located at the end of the exit passage 760. The exit passage 760 may be perpendicular to passageways 748, 750, and 752. An interior passenger compartment 730 may include more exit passages 760 in locations other than those shown. Examples of this disclosure illustrated and described with respect to Figures 1 to 10 may be used within an interior passenger compartment 730.
[0067] Figure 12B shows a plan view of an aircraft interior cabin 780 according to an example of the present disclosure. The interior cabin 780 is an example of the interior cabin 730 shown in Figure 11. The interior cabin 780 may be located within the aircraft fuselage 781. For example, one or more fuselage walls may define the interior cabin 780. The interior cabin 780 includes a number of compartments, including a main cabin 782 having passenger seats 783 and a rear compartment 785 behind the main cabin 782. It should be understood that the interior cabin 780 may include more or fewer compartments than those shown.
[0068] The interior passenger compartment 780 may include a single aisle 784 leading to the aft compartment 785. The single aisle 784 may extend through the center of the interior passenger compartment 780 leading to the aft compartment 785. For example, the single aisle 784 may be coaxial with the central longitudinal section of the interior passenger compartment 780.
[0069] The passageway 784 extends to an exit passageway or door passageway 790. The exit door 792 is located at the end of the exit passageway 790. The exit passageway 790 may be perpendicular to the passageway 784. The interior passenger compartment 780 may include more exit passageways than those shown. Examples of the present disclosure illustrated and described with respect to Figures 1 to 10 may be used within the interior passenger compartment 780.
[0070] Figure 13 shows an internal perspective view of an aircraft interior cabin 800 according to an example of the present disclosure. The interior cabin 800 includes an outer wall 802 connected to a ceiling 804. A window 806 may be formed within the outer wall 802. The floor 808 supports rows of seats 810. As shown in Figure 13, a row 812 may include two seats 810 on either side of an aisle 813. However, a row 812 may include more or fewer seats 810 than shown. In addition, the interior cabin 800 may include more aisles than shown.
[0071] The passenger service unit (PSU) 814 is fixed between the outer walls 802 and the ceiling 804 on both sides of the aisle 813. The PSU 814 extends between the front and rear ends of the interior passenger compartment 800. For example, the PSU 814 may be positioned above each seat 810 in a row 812. Each PSU 814 may include a housing 816, which typically includes a vent, a reading light, an oxygen mask drop panel, a cabin crew call button, and other such controls for each seat 810 (or group of seats) in a row 812.
[0072] The overhead storage bay assemblies 818 are fixed to the ceiling 804 and / or the outer wall 802 above and inward of the PSU 814 on both sides of the aisle 813. The overhead storage bay assemblies 818 are fixed above the seats 810. The overhead storage bay assemblies 818 extend between the front and rear ends of the interior passenger compartment 800. Each bay bay assembly 818 may include a pivotable bay or bucket 820 pivotally fixed to a strongback (not visible in Figure 13). The overhead storage bay assemblies 818 may be positioned above and inward of the underside of the PSU 814. The overhead storage bay assemblies 818 are configured to pivotally open, for example, to accommodate passengers' carry-on baggage and personal items.
[0073] Examples of the present disclosure illustrated and described with respect to Figures 1 to 10 can be used within an interior guest room 800.
[0074] Furthermore, this disclosure includes examples relating to the following clauses.
[0075] Clause 1. An electromagnetic interference (EMI) reduction cover coupled to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing, wherein the EMI reduction cover is One or more grids comprising multiple structural beams defining multiple light apertures, wherein the multiple light apertures facilitate the passage of UV light emitted from a UV light source, and the EMI reduction cover includes at least 90 percent open space relative to the multiple structural beams, one or more grids An EMI reduction cover equipped with this feature.
[0076] Clause 2. The EMI reduction cover described in Clause 1 is not configured to be directly coupled to a UV light source.
[0077] Clause 3. Multiple structural beams are formed of reflective material, EMI reduction cover as described in Clause 1 or 2.
[0078] Clause 4. An EMI reduction cover as described in any one of Clauses 1 to 3, wherein the pitch of the EMI reduction cover is 0.3 inches or less, and the thickness of each beam is 0.02 inches or less.
[0079] Clause 5. An EMI reduction cover as described in any one of Clauses 1 through 4, with a pitch of 0.2935 inches and a thickness of 0.01 inches for each beam.
[0080] Clause 6. The EMI reduction cover described in any one of Clauses 1 to 5, wherein the ratio of the pitch of the EMI reduction cover to the thickness of each beam is at least 15:1.
[0081] Clause 7. The ratio of the pitch of the EMI reduction cover to the thickness of each beam is 29.35:1, as specified in any one of Clauses 1 to 6.
[0082] Clause 8. The ratio of the pitch of the EMI reduction cover to the thickness of each beam is 30:1, as specified in any one of Clauses 1 to 7.
[0083] Clause 9. The EMI reduction cover according to any one of Clauses 1 to 8, further comprising an outer frame, wherein a plurality of structural beams and a plurality of optical apertures are positioned inward from the outer frame, and the outer frame is configured to be fixed to the housing.
[0084] Clause 10. An EMI reduction cover according to any one of Clauses 1 to 9, wherein the beam has at least one surface that traverses the direction of UV light emitted from a UV light source.
[0085] Clause 11. The EMI reduction cover according to Clause 10, wherein at least one surface is configured to face a UV light source, and at least one surface includes a reflective material that facilitates the reflection of at least a portion of the UV light passing through one or more light apertures.
[0086] Clause 12. An EMI reduction cover as described in Clause 11, wherein at least one surface comprises two surfaces that traverse the direction of UV light emitted from a UV light source.
[0087] Clause 13. Multiple structural beams further comprising a blunt surface connected to at least one surface, as described in Clause 11, for EMI reduction covers.
[0088] Clause 14. Multiple structural beams have EMI reduction covers as described in any one of Clauses 1 to 13, having a triangular axial cross-section.
[0089] Clause 15. An EMI reduction cover according to any one of Clauses 1 to 14, further comprising one or more substrates coupled to one or more grids, wherein one or more substrates substantially transmit UV light.
[0090] Clause 16.1 More than one grid, Internal grid and External grid and An EMI reduction cover as described in any one of clauses 1 to 15, comprising:
[0091] Clause 17. The EMI reduction cover described in Clause 16, wherein the internal grid is staggered relative to the external grid, and vice versa.
[0092] Clause 18. The beams of the internal grid are closer to the longitudinal axis of the UV light source than the beams of the external grid, as described in Clause 16 or 17, for EMI reduction covers.
[0093] Clause 19. External grid beams are not directly above or below internal grid beams, and the EMI reduction covers described in any one of Clauses 16 to 18 are not provided.
[0094] Clause 20. An EMI reduction cover as described in any one of Clauses 16 to 19, wherein the beams of the external grid are in the shadow formed by the beams of the internal grid when the UV light source emits UV light.
[0095] Clause 21. An EMI reduction cover as described in any one of Clauses 16 to 20, wherein multiple optical apertures are sized based on the frequency of UV light emitted from a UV light source.
[0096] Clause 22. An electromagnetic interference (EMI) reduction cover coupled to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing, wherein the EMI reduction cover is One or more grids comprising multiple structural beams defining multiple light apertures, wherein the multiple light apertures facilitate the passage of UV light emitted from a UV light source, and the beams have at least one surface that traverses the direction of the UV light emitted from the UV light source. An EMI reduction cover equipped with this feature.
[0097] Clause 23. An EMI reduction cover according to Clause 22, wherein at least one surface is configured to face a UV light source, and at least one surface includes a reflective material that facilitates the reflection of at least a portion of UV light passing through one or more light apertures.
[0098] Clause 24. An EMI reduction cover as described in Clause 23, wherein at least one surface comprises two surfaces that traverse the direction of UV light emitted from a UV light source.
[0099] Clause 25. A plurality of structural beams further comprising a blunt surface connected to at least one surface, as described in any one of Clauses 22 to 24, which provides an EMI reduction cover.
[0100] Clause 26. Multiple structural beams have EMI reduction covers as described in any one of Clauses 22 to 25, having a triangular axial cross-section.
[0101] Clause 27. An EMI reduction cover as described in any one of Clauses 22 to 26, which is not configured to be directly coupled to a UV light source.
[0102] Clause 28. Multiple structural beams are formed of reflective material, EMI reduction cover as described in any one of Clauses 22 to 27.
[0103] Clause 29. An EMI reduction cover according to any one of Clauses 22 to 28, further comprising an outer frame, wherein a plurality of structural beams and a plurality of optical apertures are positioned inward from the outer frame, and the outer frame is configured to be fixed to the housing.
[0104] An EMI reduction cover as described in any one of Clauses 22 to 29, further comprising one or more substrates coupled to one or more grids, wherein one or more substrates substantially transmit UV light.
[0105] Clause 31.1 More than one grid, Internal grid and External grid and An EMI reduction cover as described in any one of clauses 22 to 30, comprising:
[0106] Clause 32. The EMI reduction cover described in Clause 31, wherein the internal grid is staggered relative to the external grid, and vice versa.
[0107] Clause 33. The beams of the internal grid are closer to the longitudinal axis of the UV light source than the beams of the external grid, as described in Clause 31 or 32, for the EMI reduction cover.
[0108] Clause 34. The beams of the external grid are not directly above or below the beams of the internal grid, and the EMI reduction covers described in any one of Clauses 31 to 33.
[0109] Clause 35. An EMI reduction cover as described in any one of Clauses 31 to 34, wherein the beams of the external grid are in the shadows formed by the beams of the internal grid when the UV light source emits UV light.
[0110] Clause 36. An EMI reduction cover as described in any one of Clauses 22 to 35, wherein multiple optical apertures are sized based on the frequency of UV light emitted from a UV light source.
[0111] Clause 37. An electromagnetic interference (EMI) reduction cover coupled to the housing of a UV lamp assembly having a UV light source configured to emit UV light through the light outlet of the housing, wherein the EMI reduction cover is Internal grid and External grid and Equipped with, The internal and external grids are equipped with multiple structural beams that define multiple light apertures, and the multiple light apertures are EMI-reducing covers that facilitate the passage of UV light emitted from a UV light source.
[0112] Clause 38. An EMI reduction cover as described in Clause 37, in which the internal grid is staggered relative to the external grid, and vice versa.
[0113] Clause 39. The beams of the internal grid are closer to the longitudinal axis of the UV light source than the beams of the external grid, as described in Clause 37 or 38, for EMI reduction covers.
[0114] Clause 40. External grid beams are not directly above or below internal grid beams, and the EMI reduction covers described in any one of Clauses 37 to 39.
[0115] Clause 41. An EMI reduction cover as described in any one of Clauses 37 to 40, wherein the beams of the external grid are in the shadow formed by the beams of the internal grid when the UV light source emits UV light.
[0116] Clause 42. An EMI reduction cover as described in any one of Clauses 37 to 41, which is not configured to be directly coupled to a UV light source.
[0117] Clause 43. Multiple structural beams are formed of reflective material, EMI reduction cover as described in any one of Clauses 37 to 42.
[0118] Clause 44. An EMI reduction cover according to any one of Clauses 37 to 43, further comprising an outer frame, wherein the beams and optical openings are positioned inward from the outer frame, and the outer frame is configured to be fixed to the housing.
[0119] Clause 45. An EMI reduction cover as described in any one of Clauses 37 to 44, wherein multiple optical apertures are sized based on the frequency of UV light emitted from a UV light source.
[0120] As described herein, examples of the present disclosure provide systems and methods for reducing (e.g., suppressing) EMI associated with UV lamp assemblies. Furthermore, examples of the present disclosure provide systems and methods for reducing EMI while also allowing the passage of a substantial amount of UV light (e.g., as much UV light as possible) from the UV lamp assembly.
[0121] Various terms describing space and direction, such as top, bottom, lower, middle, side, horizontal, vertical, and front, may be used to describe the examples in this disclosure, but it should be understood that such terms are simply used in relation to the orientation shown in the figures. Orientation may be reversed, rotated, or otherwise changed so that top becomes bottom or vice versa, or horizontal becomes vertical.
[0122] Structures, constraints, or elements used herein that are “configured to” perform a task or action are, in particular, structurally formed, constructed, or adapted to correspond to a task or action. For clarity and to avoid misunderstanding, objects that can simply be modified to perform a task or action are not “configured to” perform a task or action as used herein.
[0123] It should be understood that the above description is illustrative and not limiting. For example, the above examples (and / or embodiments thereof) can be used in combination with each other. In addition, many modifications can be made to adapt specific situations or materials to the teachings of the various examples of this disclosure without departing from the scope of this disclosure. The dimensions and types of materials described herein are intended to define the parameters of the various examples of this disclosure, but these examples are not limiting and are illustrative. Many other examples will become apparent to those skilled in the art upon consideration of the above description. Therefore, the scope of the various examples of this disclosure should be determined by reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims and the detailed description herein, the terms “including” and “in which” are used as plain-English equivalents to the terms “comprising” and “wherein,” respectively. Also, terms such as “first,” “second,” and “third” are used merely as designations and are not intended to impose numerical requirements on their subjects.
[0124] This written description, using examples, discloses various implementations, including the best mode, and enables a person skilled in the art to implement the various examples of this disclosure, including the manufacture and use of any device or system, and the execution of any adopted method. The claimed scope of the various embodiments of this disclosure is defined by the claims and may include other examples that a person skilled in the art may conceive. Such other examples are intended to be within the scope of the claims if they have structural elements that are not different from the language of the claims, or if they include equivalent structural elements that differ only slightly from the language of the claims. [Explanation of Symbols]
[0125] 100 UV light sterilization system 102 UV Lamp Assembly 104 Electromagnetic Interference (EMI) Reduction Cover 106 Housing 108 UV light source 110 UV light 112 light exit 114 grid 114a Internal Grid 114b External Grid 116, 116a, 116b beam 118 Optical aperture 120 pitch 122 Thickness 200, 200a, 200b UV light-emitting element 202 First Subhousing 204 Second Subhousing 300 surface 302 triangle 304 vertices 306 Distal side 400 equipment 500 circuit boards 500a First substrate 500b Second substrate 600 Longitudinal axis 610 distance 710 aircraft 712 Propulsion System 714 Engine 716 Wings 718, 732, 781 aircraft 720 Tail 722 Horizontal stabilizer 724 vertical stabilizer Rooms 730, 780, and 800 (interior rooms) 733 Front compartment 734 First Class Section 736 Business Class Section 738 Forward Galley Station 740 Extended Economy or Coach Compartments 742 Standard Economy or Coach Section 744, 785 Rear compartment 746 cabin transition area 748, 750, 752, 784, 813 aisles 760 Exit route, door passage Exit doors 762 and 792 782 Main guest room 783 passenger seats 790 Exit route, door passage 802 Wall 804 Ceiling 806 Window 808 beds 810 seats Column 812 814 Passenger Service Unit (PSU) 816 Housing 818 Storage shelf assembly 820 buckets
Claims
1. An electromagnetic interference (EMI) reduction cover coupled to the housing (106) of a UV lamp assembly (102) having a UV light source (108) configured to emit UV light (110) through an optical outlet (112) of the housing (106), wherein the EMI reduction cover is One or more grids (114) comprising a plurality of structural beams (116) defining a plurality of light apertures (118), wherein the plurality of structural beams (116) have a triangular axial cross-section, the plurality of light apertures (118) facilitate the passage of the UV light (110) emitted from the UV light source (108), and the EMI reduction cover (104) includes at least 90 percent open space relative to the plurality of structural beams (116). An EMI reduction cover (104) equipped with this feature.
2. The EMI reduction cover (104) according to claim 1, wherein the EMI reduction cover (104) is not configured to be directly coupled to the UV light source (108).
3. The EMI reduction cover (104) according to claim 1, wherein the plurality of structural beams (116) are formed of a reflective material.
4. The EMI reduction cover (104) according to claim 1, wherein the pitch (120) of the EMI reduction cover (104) is 0.3 inches or less, and the thickness (122) of each of the beams (116) is 0.02 inches or less.
5. The EMI reduction cover (104) according to claim 1, wherein the pitch (120) of the EMI reduction cover (104) is 0.2935 inches, and the thickness (122) of each of the beams is 0.01 inches.
6. The EMI reduction cover (104) according to claim 1, wherein the ratio of the pitch (120) of the EMI reduction cover (104) to the thickness (122) of each of the beams (116) is at least 15:
1.
7. The EMI reduction cover (104) according to claim 1, wherein the ratio of the pitch (120) of the EMI reduction cover (104) to the thickness (122) of each of the beams (116) is 29.35:
1.
8. The EMI reduction cover (104) according to claim 1, wherein the ratio of the pitch (120) of the EMI reduction cover (104) to the thickness (122) of each of the beams (116) is 30:
1.
9. The EMI reduction cover (104) according to claim 1, further comprising an outer frame (105), wherein the plurality of structural beams (116) and the plurality of optical apertures (118) are positioned inward from the outer frame (105), and the outer frame (105) is configured to be fixed to the housing (106).
10. The EMI reduction cover (104) according to claim 1, wherein the beam (116) comprises at least one surface (300) that traverses the direction of the UV light (110) emitted from the UV light source (108).
11. The EMI reduction cover (104) according to claim 10, wherein the at least one surface (300) is configured to face the UV light source (108), and the at least one surface (300) includes a reflective material that facilitates the reflection of at least a portion of the UV light (110) passing through the one or more light apertures (118).
12. The EMI reduction cover (104) according to claim 11, wherein the at least one surface (300) comprises two surfaces (300) that traverse the direction of the UV light (110) emitted from the UV light source (108).
13. The EMI reduction cover (104) according to claim 11, wherein the plurality of structural beams (116) further comprises a blunt surface connected to at least one surface (300).
14. The EMI reduction cover (104) according to claim 1 further comprises one or more substrates coupled to one or more grids (114), wherein the one or more substrates substantially transmit the UV light (110).
15. The aforementioned one or more grids (114) are Internal grid (114a), External grid (114b) and The EMI reduction cover (104) according to claim 1, comprising:
16. The EMI reduction cover (104) according to claim 15, wherein the internal grid is staggered with respect to the external grid (114b) and vice versa.
17. The EMI reduction cover (104) according to claim 15, wherein the beam (116) of the internal grid is closer to the longitudinal axis (600) of the UV light source (108) than the beam (116) of the external grid (114b).
18. The EMI reduction cover (104) according to claim 15, wherein the beam (116) of the external grid is not directly above or below the beam (116) of the internal grid (114a).
19. The EMI reduction cover (104) according to claim 15, wherein the beam (116) of the external grid is in the shadow formed by the beam (116) of the internal grid (114a) when the UV light source (108) emits the UV light (110).
20. The EMI reduction cover (104) according to claim 1, wherein the plurality of optical apertures (118) are sized based on the frequency of the UV light (110) emitted from the UV light source (108).
21. An electromagnetic interference (EMI) reduction cover coupled to the housing (106) of a UV lamp assembly (102) having a UV light source (108) configured to emit UV light (110) through an optical outlet (112) of the housing (106), wherein the EMI reduction cover is One or more grids (114) comprising a plurality of structural beams (116) defining a plurality of light apertures (118), wherein the plurality of structural beams (116) have a triangular axial cross-section, the plurality of light apertures (118) facilitate the passage of the UV light (110) emitted from the UV light source (108), and the beams (116) have at least one surface (300) that traverses the direction of the UV light (110) emitted from the UV light source (108). An EMI reduction cover (104) equipped with this feature.
22. The EMI reduction cover (104) according to claim 21, wherein the at least one surface (300) is configured to face the UV light source (108), and the at least one surface (300) includes a reflective material that facilitates the reflection of at least a portion of the UV light (110) passing through the one or more light apertures (118).
23. The EMI reduction cover (104) according to claim 22, wherein the at least one surface (300) comprises two surfaces (300) that traverse the direction of the UV light (110) emitted from the UV light source (108).
24. The EMI reduction cover (104) according to claim 21, wherein the plurality of structural beams (116) further comprises a blunt surface connected to at least one surface (300).
25. The EMI reduction cover (104) according to claim 21, wherein the EMI reduction cover (104) is not configured to be directly coupled to the UV light source (108).
26. The EMI reduction cover (104) according to claim 21, wherein the plurality of structural beams (116) are formed of a reflective material.
27. The EMI reduction cover (104) according to claim 21, further comprising an outer frame (105), wherein the plurality of structural beams (116) and the plurality of optical apertures (118) are positioned inward from the outer frame (105), and the outer frame (105) is configured to be fixed to the housing (106).
28. The EMI reduction cover (104) according to claim 21 further comprises one or more substrates coupled to one or more grids (114), wherein the one or more substrates substantially transmit the UV light (110).
29. The aforementioned one or more grids (114) are Internal grid (114b), External grid (114a) and The EMI reduction cover (104) according to claim 21, comprising:
30. The EMI reduction cover (104) according to claim 29, wherein the internal grid is staggered with respect to the external grid (114b), and vice versa.
31. The EMI reduction cover (104) according to claim 29, wherein the beam (116) of the internal grid is closer to the longitudinal axis (600) of the UV light source (108) than the beam (116) of the external grid (114b).
32. The EMI reduction cover (104) according to claim 29, wherein the beam (116) of the external grid is not directly above or below the beam (116) of the internal grid (114a).
33. The EMI reduction cover (104) according to claim 29, wherein the beam (116) of the external grid is in the shadow formed by the beam (116) of the internal grid (114a) when the UV light source (108) emits the UV light (110).
34. The EMI reduction cover (104) according to claim 21, wherein the plurality of optical apertures (118) are sized based on the frequency of the UV light (110) emitted from the UV light source (108).
35. An electromagnetic interference (EMI) reduction cover coupled to the housing (106) of a UV lamp assembly (102) having a UV light source (108) configured to emit UV light (110) through an optical outlet (112) of the housing (106), wherein the EMI reduction cover is Internal grid (114a), External grid (114b) and Equipped with, The internal grid (114a) and the external grid (114b) are provided with a plurality of structural beams (116) defining a plurality of light apertures (118), the plurality of structural beams (116) having a triangular axial cross-section, and the plurality of light apertures (118) are provided with an EMI reduction cover (104) that facilitates the passage of the UV light (110) emitted from the UV light source (108).
36. The EMI reduction cover (104) according to claim 35, wherein the internal grid (114a) is staggered with respect to the external grid, and vice versa.
37. The EMI reduction cover (104) according to claim 35, wherein the beam (116) of the internal grid is closer to the longitudinal axis (600) of the UV light source (108) than the beam (116) of the external grid (114b).
38. The EMI reduction cover (104) according to claim 35, wherein the beam (116) of the external grid is not directly above or directly below the beam (116) of the internal grid (114a).
39. The EMI reduction cover (104) according to claim 35, wherein the beam (116) of the external grid is in the shadow formed by the beam (116) of the internal grid (114a) when the UV light source (108) emits the UV light (110).
40. The EMI reduction cover (104) according to claim 35, wherein the EMI reduction cover (104) is not configured to be directly coupled to the UV light source (108).
41. The EMI reduction cover (104) according to claim 35, wherein the plurality of structural beams (116) are formed of a reflective material.
42. The EMI reduction cover (104) according to claim 35, further comprising an outer frame (105), wherein the beam (116) and the optical aperture (118) are positioned inward from the outer frame (105), and the outer frame (105) is configured to be fixed to the housing (106).
43. The EMI reduction cover (104) according to claim 35, wherein the plurality of optical apertures (118) are sized based on the frequency of the UV light (110) emitted from the UV light source (108).