Lighting device

Abstract

To provide a lighting device which facilitates introduction of an air treatment function.SOLUTION: A lighting device 10 according to the present invention has a reflector 15, an illumination light source 16, an ultra-violet irradiation unit 34. The illumination light source 16 is disposed so that the light reflected by a front surface side of the reflector 15 can be supplied to the indoor. The ultra-violet irradiation unit 34 is disposed on the rear side opposed to the front surface side relative to the reflector 15.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a lighting device. [Background technology]

[0002] Conventionally, there is a lighting device equipped with an air treatment function, in which an illumination light source and an ultraviolet light source are arranged on the front surface side of a reflector, and a shielding portion is arranged to cover the ultraviolet light source.

[0003] This lighting device cannot be installed unless there is space on the surface side of the reflector to accommodate the ultraviolet light source and shielding unit. Even if it is possible to install them, there is a risk that the original lighting function will be impaired, making it difficult to introduce an air processing function. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-72622 A Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a lighting device that can easily incorporate an air treatment function. [Means for solving the problem]

[0006] The lighting device according to the embodiment includes a reflector, an illumination light source, and an ultraviolet ray irradiator. The illumination light source is arranged so as to be able to supply light reflected by the front surface side of the reflector into a room. The ultraviolet ray irradiator is arranged on the rear side of the reflector, facing the front surface side. Effect of the Invention

[0007] According to the embodiment, it is expected that a lighting device into which an air treatment function can be easily installed can be provided. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of a lighting device showing a first embodiment. [Diagram 2] FIG. 2 is a perspective view of the lighting device as viewed from above. [Diagram 3] FIG. 2 is a perspective view of the lighting device as viewed from below. [Figure 4] FIG. 2 is a perspective view of an air processing unit of the lighting device. [Diagram 5] FIG. 2 is a cross-sectional view of the air processing unit. [Figure 6] FIG. 4 is a cross-sectional view of a lighting device showing a second embodiment. [Figure 7] FIG. [Figure 8] FIG. 2 is a perspective view of the lighting device with the housing omitted. [Figure 9] FIG. 4 is a cross-sectional view of the air treatment unit of the lighting device. [Figure 10] FIG. 11 is a bottom view of the lighting device according to the third embodiment. [Figure 11] FIG. 13 is a side view showing a lighting device according to a fourth embodiment. [Figure 12] FIG. 4 is a side view showing another installation example of the lighting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment will be described with reference to the drawings.

[0010] The air treatment device in the following embodiment is a device that performs air treatment of any of sterilization, disinfection, sterilization, sterilization, deodorization, and deodorization by a predetermined method on the air flowing inside the air treatment device or the outside air. The air treatment of the air treatment device can be interpreted as any of sterilization, disinfection, sterilization, sterilization, deodorization, and deodorization. The predetermined method here is light irradiation, photocatalysis, ozone, and the like. Light irradiation refers to irradiation with light of wavelengths such as the UV-C region, UV-B region, UV-A region, visible light region, and infrared region. Photocatalysis refers to suppressing the activity of bacteria, viruses, and odor sources floating in the air, or decomposing them into water and carbon dioxide, by active enzymes and OH radicals generated by irradiating light (ultraviolet light or visible light) to a photocatalyst such as titanium oxide arranged inside the air treatment device. Ozone refers to oxidizing and deodorizing odor components in the air and odor components attached to the surface of an object.

[0011] 1 to 5 show a first embodiment.

[0012] 1 to 3 show a lighting device 10. The lighting device 10 has a lighting function and is also an air treatment device having an air treatment function for treating the air in a room in which the lighting device 10 is installed (a room in which light from the lighting device 10 is irradiated). The lighting device 10 is, for example, a long base light with a longitudinal length of 4 feet, and is a recessed lighting device that is installed in a recessed state in a ceiling surface (ceiling board) 12. The lighting device 10 may also be a directly attached lighting device that is directly attached to a ceiling surface.

[0013] The lighting device 10 includes a reflector 15 that also serves as the fixture body, an illumination light source 16 that is detachably attached to the underside, which is the front side, of the reflector 15, an air processing unit 17 that is located above, which is the back side, of the reflector 15, and a power supply section 18 that supplies power to the air processing unit 17. The lighting device 10 further includes a terminal block and a lighting device (not shown) that are located in the body section 20 of the reflector 15. A power line that supplies AC power from a commercial AC power source is connected to the terminal block, and the AC power is supplied from the terminal block to the lighting device and the power supply section 18. The lighting device converts the AC power into a predetermined lighting power and supplies it to the illumination light source 16 to light it.

[0014] The reflector 15 is elongated and made of, for example, metal, and is installed in an embedded state in the recessed opening 12a opened in the ceiling surface 12. The reflector 15 has a main body 20 provided in the center of the short side direction intersecting with the longitudinal direction, and reflecting surface portions 21 and 22 expanded obliquely downward from both sides of the short side direction of the main body 20. The reflector 15 is desirably made of a material having a high reflectance of at least visible light.

[0015] The main body 20 is formed in a generally U-shaped cross section with an opening on the bottom side. A terminal block and a lighting device are attached to the bottom side of the main body 20, and the terminal block and the lighting device are housed within the main body 20. The top surface of the main body 20 is provided with a wiring hole 23 for drawing a power line connected to the terminal block from the outside into the main body 20, and a plurality of mounting holes 24 for mounting to hanging bolts protruding from a ceiling structure above the ceiling surface 12. The lighting device may be attached to the illumination light source 16 side.

[0016] The reflecting surface portions 21, 22 on both sides have a reflecting surface that reflects light downward from the illumination light source 16 on their undersides. The reflecting surface portion 21 on one side has a first ventilation opening 25 and a second ventilation opening 26 that allow air to circulate in the central region in the longitudinal direction. The first ventilation opening 25 and the second ventilation opening 26 are arranged at positions spaced apart by a predetermined length in the longitudinal direction of the reflecting surface portion 21, and these positions correspond to the air processing unit 17. The first ventilation opening 25 and the second ventilation opening 26 may have louvers arranged therein to suppress light leakage from the air processing unit 17 into the room and to control the flow of air.

[0017] The illumination light source 16 is long and detachably attached to the underside of the main body 20 by an attachment mechanism using, for example, an attachment spring. The illumination light source 16 includes a metal chassis 28, a light source module (not shown) arranged on the underside of the chassis 28, and a light-transmitting cover 29 attached to the chassis 28 to cover the light source module. The light source module is configured by mounting a plurality of light-emitting elements, such as LED elements, that emit visible light on a board.

[0018] 1 to 5 show the air processing unit 17. The air processing unit 17 is disposed on the rear side (the rear side opposite to the front side) of the reflecting surface portion 21 on one side of the reflector 15, facing the front side, and in this embodiment, is disposed and attached on the upper surface side, which is the rear side, of the reflecting surface portion 21 on one side.

[0019] The air treatment unit 17 includes an air treatment tank 32, and a fan 33 and an ultraviolet ray irradiation section 34 disposed within the air treatment tank 32.

[0020] The air treatment tank 32 is formed in a rectangular box or cylinder shape that is long in the longitudinal direction of the reflecting surface portion 21, and is attached to the upper surface side of the reflecting surface portion 21 by, for example, screwing, or is attached to a bracket attached to the main body portion 20 and disposed on the upper surface side of the reflecting surface portion 21. An air intake port 36 for taking in air is provided on one end side in the longitudinal direction of the lower surface of the air treatment tank 32, and an exhaust port 37 for exhausting air treated in the air treatment tank 32 is provided on the other end side, and an air passage 38 is formed in the air treatment tank 32, communicating from the air intake port 36 to the exhaust port 37, through which air flows. The lower surface side of the air treatment tank 32 may be open, and the lower surface portion of the air treatment tank 32 may be formed of the reflecting surface portion 21.

[0021] The air intake 36 and the air exhaust 37 are preferably located at positions separated from each other on both ends in the longitudinal direction of the air treatment tank 32 so that air exhausted from the air exhaust 37 is not sucked into the air intake 36 and circulates in an area close to the air treatment unit 17. On the other hand, if the length of the air treatment tank 32 (air treatment unit 17) is longer than 2 feet, it becomes heavy and increases the load on the attached reflector 15, so the length of the air treatment tank 32 is preferably 2 feet or less.

[0022] When the air treatment tank 32 is attached to the upper surface side of the reflecting surface portion 21, the intake port 36 of the air treatment tank 32 faces and communicates with the first ventilation port 25 of the reflecting surface portion 21, and the exhaust port 37 faces and communicates with the second ventilation port 26 of the reflecting surface portion 21. Therefore, an air flow path is formed in which indoor air is taken into the air treatment tank 32 through the first ventilation port 25 and the intake port 36, and air processed in the air treatment tank 32 is exhausted into the room through the exhaust port 37 and the second ventilation port 26. The intake port 36 (exhaust port 37) does not have to be in communication with the first ventilation port 25 (second ventilation port 26). For example, the intake port 36 (exhaust port 37) may be disposed facing the first ventilation port 25 (second ventilation port 26) with a space therebetween.

[0023] The fan 33, for example an axial fan, is positioned between the intake port 36 and exhaust port 37 of the air treatment tank 32, on the intake port 36 side, upstream of the air flow from the ultraviolet irradiation unit 34 located in the air treatment tank 32, and creates an air flow from the intake port 36 to the exhaust port 37 within the air treatment tank 32.

[0024] The ultraviolet ray irradiation section 34 is disposed between the intake port 36 and exhaust port 37 of the air treatment tank 32, at a position on the exhaust port 37 side, which is downstream of the air flow from the fan 33. The ultraviolet ray irradiation section 34 is disposed on the rear side (the rear side opposite to the front side) facing the front side of the reflective surface section 21 on one side of the reflector 15. The ultraviolet ray irradiation section 34 includes a light source module 42 having a long substrate 40 and light emitting elements 41, which are ultraviolet ray light sources, mounted in plurality along the longitudinal direction of the substrate 40.

[0025] Light emitting element 41 is an LED (sterilizing LED) that emits ultraviolet light of a UV-C wavelength component with a peak wavelength of 400 nm or less for sterilizing air, preferably an ultraviolet light of a wavelength component of 200 to 280 nm.

[0026] The ultraviolet irradiating unit 34 is attached to one side surface of the air treatment tank 32 that intersects with the bottom surface on which the air intake 36 and the exhaust vent 37 are provided, and light in the ultraviolet region from the light emitting element 41 is irradiated to the air flowing through the air passage 38 in the air treatment tank 32. By attaching the ultraviolet irradiating unit 34 to the side surface of the air treatment tank 32, it is possible to reduce the leakage of light from the air intake 36 and the exhaust vent 37 compared to when the ultraviolet irradiating unit 34 is attached to the top surface of the air treatment tank 32, and it is also possible to reduce the accumulation of dust on and covering the light emitting element 41 compared to when the ultraviolet irradiating unit 34 is attached to the bottom surface of the air treatment tank 32.

[0027] In addition to the ultraviolet irradiation section 34, the air treatment unit 17 may be provided with either or both of a photocatalyst device having a photocatalyst body and a photocatalyst light source that emits light of a wavelength component of at least 360 nm to 420 nm in the UV-A or visible region that excites the photocatalyst supported on the photocatalyst body, and an ozone generator that generates ozone, and may be disposed in the air treatment tank 32. The ozone generator is preferably disposed closer to the exhaust port 37 than the ultraviolet irradiation section 34 and the photocatalyst device, etc., in order to suppress the effects of ozone on other devices.

[0028] The power supply unit 18 is attached, for example, by screwing, to the back surface, or upper surface, of the reflecting surface 22 on the other side of the reflecting plate 15, which is opposite to the reflecting surface 21 on one side where the air processing unit 17 is arranged. The power supply unit 18 is arranged in a central area in the longitudinal direction of the reflecting surface 22, at a position corresponding to the longitudinal area of ​​the air processing unit 17 when viewed from the short side direction of the reflecting plate 15.

[0029] An input cable from the terminal block is connected to the power input terminal of the power supply unit 18. One end of a connection cable is connected to the output terminal of the power supply unit 18, and the other end of the connection cable is connected to the air treatment unit 17. The power supply unit 18 converts the AC power supplied through the terminal block into a predetermined operating power for operating the fan 33 and the ultraviolet ray irradiation unit 34, and supplies it to the air treatment unit 17 through the connection cable. The connection cable is routed through the upper side of the main body 20 of the reflector 15.

[0030] Next, the operation of the lighting device 10 of the first embodiment will be described.

[0031] When AC power is supplied to the lighting device, the lighting device converts the input AC power into lighting power and supplies it to the illumination light source 16, thereby lighting the illumination light source 16. When the illumination light source 16 is turned on, light is emitted into the room to illuminate it.

[0032] When AC power is supplied to the power supply unit 18, the power supply unit 18 converts the AC power into a predetermined operating power and supplies it to the fan 33 and the ultraviolet ray irradiation unit 34, rotating the fan 33 and turning on the ultraviolet ray irradiation unit 34. The supply of power to the power supply unit 18 may be linked to the supply of power to the lighting device. For example, the supply of power to the power supply unit 18 is performed only while power is being supplied to the lighting device. Also, for example, power is supplied to the power supply unit 18 for a predetermined period after the supply of power to the lighting device is stopped.

[0033] By rotating the fan 33, indoor air is sucked into the air treatment tank 32 through the first air vent 25 and the air inlet 36 of the reflector 15, and the air sucked into the air treatment tank 32 is blown out into the room through the exhaust port 37 and the second air vent 26 of the reflector 15, thereby circulating the air in the room.

[0034] When the ultraviolet irradiation unit 34 is turned on, the air flowing through the air treatment tank 32 is sterilized by being irradiated with ultraviolet light having a UV-C wavelength component with a peak wavelength of 400 nm or less, preferably an ultraviolet light having a wavelength component of 200 to 280 nm.

[0035] Therefore, indoor air is sucked into the air treatment tank 32, irradiated with light in the ultraviolet range and blown out into the room, thereby sterilizing the indoor air.

[0036] In the lighting device 10 of the first embodiment, the air processing unit 17 is attached to the back side of the reflecting plate 15, so that the dead space behind the reflecting plate 15 can be effectively utilized to place the air processing unit 17, and there is no need for construction work or installation parts to install the air processing unit 17 on the ceiling side, so that it is easy to introduce an air processing function to the lighting device 10. In other words, the air processing unit 17 can be easily installed.

[0037] In addition, the air processing unit 17 is attached to the back side of the reflective surface portion 21 on one side of the reflector 15, and the power supply unit 18 is attached to the back side of the reflective surface portion 22 on the other side, so that heavy objects can be distributed and arranged without being concentrated on only one side of the reflective surface portions 21, 22 on both sides, and bending and distortion of the reflector 15 can be suppressed.

[0038] The length of the air treatment unit 17 is set to 2 feet or less, and the weight is reduced, so that the load on the reflector plate 15 to which the air treatment unit 17 is attached can be reduced, and bending and distortion of the reflector plate 15 can be suppressed.

[0039] Next, a second embodiment is shown in Figures 6 to 9. Note that the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

[0040] 6 and 7, the lighting device 10 includes a housing 50 formed in a long box shape with an opening on the bottom side, and a reflector 15, an illumination light source 16, an air processing unit 17, and a power supply unit 18 arranged in the housing 50 so as to close the opening on the bottom side. Furthermore, the lighting device 10 includes a terminal block and a lighting device (not shown) arranged in the main body 20 of the reflector 15.

[0041] Housing 50 is made of, for example, metal and has top surface 51, side surfaces 52 provided on both short sides of top surface 51, end surfaces 53 provided on both longitudinal ends of top surface 51, and an opening 54 provided on the bottom surface. Housing 50 is inserted into recessed opening 12a in ceiling surface 12, and top surface 51 is attached to a hanging bolt, so that housing 50 is installed in an embedded state in ceiling surface 12.

[0042] A reflector 15 is attached inside an opening 54 of the housing 50, and an illumination light source 16 is attached to this reflector 15. A rear space 55 is formed on the rear side of the reflector 15 between the reflector 15 and an upper surface 51 of the housing 50.

[0043] Furthermore, a louver 57 that allows air to flow and rectifies the air flow is attached to the first ventilation opening 25 and the second ventilation opening 26 provided in the reflecting surface portion 21 on one side of the reflecting plate 15. Note that the louver 57 does not necessarily have to be attached.

[0044] The air processing unit 17 is disposed in a rear space 55 between the housing 50 and the reflecting plate 15 on the rear side. The air processing unit 17 is attached to a mounting plate 59, and is attached to the lower surface side of the upper surface part 51 of the housing 50 by this mounting plate 59.

[0045] 8 and 9, in the air processing unit 17, a fan 33 is disposed at one end in the longitudinal direction of the air processing tank 32. A centrifugal fan is used for the fan 33, and an intake port for drawing in air is provided on the underside and an exhaust port for discharging air is provided in part of the peripheral surface, and this exhaust port is connected to the inside of the air processing tank 32. In this air processing unit 17, the intake port of the fan 33 is configured as an intake port 36 of the air processing tank 32.

[0046] An exhaust port 37 is provided on the underside of the other end in the longitudinal direction of the air treatment tank 32. An ultraviolet ray irradiation unit 34 is disposed inside the air treatment tank 32, on the underside thereof, at an edge position upstream of the exhaust port 37 in the direction of air flow. The ultraviolet ray irradiation unit 34 is disposed with a substrate 40 rising obliquely so that a light emitting element 41 faces the direction of air flow, and light from the light emitting element 41 is irradiated toward one end side (fan 33 side) inside the air treatment tank 32. An air guide plate 60 is disposed above the exhaust port 37 to guide air flowing into the other end side of the air treatment tank 32 to the exhaust port 37.

[0047] The air processing unit 17 is disposed facing and spaced apart from the rear surface side of the reflector 15. The air intake port 36 of the air processing unit 17 is disposed facing and above the first air vent 25 of the reflector 15, and is capable of drawing in indoor air through the first air vent 25. The air exhaust port 37 of the air processing unit 17 is disposed facing and above the second air vent 26 of the reflector 15, and is capable of blowing air out into the room through the second air vent 26.

[0048] Then, by the rotation of the fan 33, indoor air is sucked into the air treatment tank 32 through the first ventilation port 25 and the intake port 36 of the reflector 15, and the air sucked into the air treatment tank 32 is blown out into the room through the exhaust port 37 and the second ventilation port 26 of the reflector 15, circulating the air in the room. Since the reflector 15 and the air treatment unit 17 are separated, some of the air sucked in through the intake port 36 contains air from the housing 50, but most of the air is sucked in through the first ventilation port 25 of the reflector 15 facing the intake port 36 by the flow of air sucked into the intake port 36. Similarly, some of the air blown out from the exhaust port 37 is diffused inside the housing 50, but most of the air is blown out into the room through the second ventilation port 26 of the reflector 15 facing the exhaust port 37 by the flow of air blown out from the exhaust port 37.

[0049] When the ultraviolet irradiation unit 34 is turned on, the air flowing through the air treatment tank 32 is irradiated with ultraviolet light to sterilize it. The light is irradiated in the longitudinal direction of the air treatment tank 32, from the downstream side to the upstream side of the air flow, so that the time that the light is irradiated onto the air is longer, and the air can be sterilized efficiently.

[0050] Therefore, in the air treatment unit 17, indoor air is drawn into the air treatment tank 32, and the drawn air is irradiated with light in the ultraviolet range and blown out into the room, thereby sterilizing the indoor air.

[0051] In the lighting device 10 of the second embodiment, the air processing unit 17 is disposed between the housing 50 and the rear side of the reflector 15, so that the dead space behind the reflector 15 within the housing 50 can be effectively utilized to place the air processing unit 17. This eliminates the need for construction work such as installing the air processing unit 17 on the ceiling side or the need to use installation parts, and therefore makes it easy to introduce an air processing function into the lighting device 10.

[0052] In addition, since the air processing unit 17 is spaced apart from and faces the rear surface side of the reflector 15, the air processing unit 17 can be disposed within the housing 50 without applying a load to the reflector 15.

[0053] Next, a third embodiment is shown in Fig. 10. Note that the same components as those in the above-mentioned embodiments are designated by the same reference numerals and the description thereof will be omitted.

[0054] As in the second embodiment, the lighting device 10 has a housing 50 in which a reflector 15, an illumination light source 16, an air processing unit 17, etc. are arranged, but this is an example in which the first ventilation hole 25 and the second ventilation hole 26 are provided in a location other than the reflective surface portion 21 of the reflector 15.

[0055] The first ventilation opening 25 is provided with a gap between one end side of the housing 50 and one end side of the reflector 15, and the first ventilation opening 25 is provided with a gap between the other end side of the housing 50 and the other end side of the reflector 15. For example, by making both ends of the reflective surface portions 21, 22 of the reflector 15 shorter in the longitudinal direction than the main body portion 20, each ventilation opening 25, 26 is provided with a gap between the housing 50 and the reflector 15.

[0056] The air processing unit 17 has an intake port 36 communicating with or facing the first ventilation port 25 on one end side, and an exhaust port 37 communicating with or facing the second ventilation port 26 on the other end side.

[0057] In the lighting device 10 of the third embodiment, the first ventilation opening 25 and the second ventilation opening 26 are less noticeable, improving the appearance.

[0058] Next, a fourth embodiment is shown in Figures 11 and 12. Note that the same components as those in the above-mentioned embodiments are denoted by the same reference numerals and the description thereof will be omitted.

[0059] The lighting device 10 shown in Fig. 11 is a surface-mount lighting device that is directly attached to a ceiling surface 12. It includes a fixture body 70 that is attached to the ceiling surface, a reflector 15 and an illumination light source 16 that are attached to the fixture body 70, a terminal block and a lighting device that are disposed within the fixture body 70, and an air processing unit 17.

[0060] The air treatment unit 17 includes an ultraviolet irradiation section 34 attached to the back side of the reflective surfaces 21, 22 on both sides of the reflector 15, and a power supply section 18 (not shown) attached within the fixture body 70 or to the back side of one of the reflective surfaces 21, 22 of the reflector 15.

[0061] The ultraviolet irradiating unit 34 irradiates light toward the ceiling. The light from the ultraviolet irradiating unit 34 is irradiated onto the ceiling surface 12, thereby preventing the adhesion and growth of mold on the ceiling surface 12. The light from the ultraviolet irradiating unit 34 is irradiated into the air around the lighting device 10, thereby sterilizing the air near the ceiling. In addition, since the light is irradiated from the ultraviolet irradiating unit 34 toward the ceiling, direct irradiation of light onto people below can be suppressed.

[0062] 12 shows an example of installation using the above-mentioned lighting device 10, in which multiple lighting devices are installed along a frame 71 suspended from the ceiling to make the average illuminance of the space uniform, for example, in a warehouse or factory. In this case, too, light is emitted from the ultraviolet irradiation unit 34 toward the ceiling to sterilize the air near the ceiling. By installing multiple lighting devices 10 on the frame 71, the sterilization effect of the air can be improved.

[0063] In addition, the air processing unit 17 of this lighting device 10 does not use a fan, which prevents noise generation and saves power.

[0064] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0065] 10. Lighting Equipment 15 Reflector 16 Lighting source 17 Air handling unit 18 Power supply section 21 Reflective surface section 22 Reflective surface section 25 First Vent 26 Second Vent 32 Air treatment tank 33 Fans 34 Ultraviolet irradiation unit 36 Air Intake 37 Exhaust port 50 Case

Claims

1. A reflector; an illumination light source arranged to supply light reflected on the front surface side of the reflector to the room; an ultraviolet irradiation unit disposed on the rear side opposite to the front side of the reflector; A lighting device comprising:

2. The ultraviolet ray irradiation unit irradiates light toward the ceiling.

2. The lighting device according to claim 1 .

3. The air treatment tank has an air intake port and an exhaust port, a fan that is provided in the air treatment tank and creates an air flow from the air intake port toward the exhaust port, and the ultraviolet ray irradiation unit that irradiates light into the air treatment tank, and the air treatment unit is disposed on the rear side of the reflector.

2. The lighting device according to claim 1 .

4. The reflector has a main body in which the illumination light source is disposed, and a pair of reflecting surfaces provided on both sides of the main body. The air processing unit is attached to the rear side of one of the reflecting surfaces, and a power supply unit that supplies power to the ultraviolet ray irradiation unit and the fan is attached to the rear side of the other of the reflecting surfaces.

4. The lighting device according to claim 3.

5. A housing having an opening on one side, The reflecting plate is disposed in the housing so as to close the opening, and the air processing unit is disposed between the reflecting plate and the housing on the rear side of the reflecting plate.

4. The lighting device according to claim 3.

6. The reflector has a first vent facing the intake port of the air processing unit and a second vent facing the exhaust port of the air processing unit, The air processing unit is opposed to and spaced from the rear surface of the reflector.

6. The lighting device according to claim 5.

7. A first air vent facing the intake port of the air processing unit is provided between one end side of the housing and one end side of the reflector, and a second air vent facing the exhaust port of the air processing unit is provided between the other end side of the housing and the other end side of the reflector.

6. The lighting device according to claim 5.

8. The air handling unit is provided with a length of less than 2 feet.

4. The lighting device according to claim 3.

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