Air treatment equipment

Abstract

To provide an air treatment device that can be simplified.SOLUTION: An air treatment device 10 includes an external housing 24, an internal housing 75, a first opening 18a, a second opening 19a, an air treatment part 20, and an air flow passage 22. The external housing 24 can be installed in an installation surface in a space. The internal housing 75 is detachably attached to the external housing 24. The first opening 18a is provided in the internal housing 75, and is opened to the space in the state that the internal housing 75 is installed in the external housing 24. Air is circulated therein. The second opening 19a is provided in the external housing 24, and air is circulated therein. The air treatment part 20 is provided in the internal housing 75, and includes a light catalyst filter 117 and an ultraviolet light source 110. The air flow passage 22 passes through the first opening 18a, an outside passage 21 sandwiched by the external housing 24 and the internal housing 75, the air treatment part 20, and the second opening 19a.SELECTED DRAWING: Figure 5

Description

Technical Field

[0006]

[0001] Embodiments of the present invention relate to an air treatment device.

Background Art

[0002] Conventionally, there is a device that provides a flow path for air connecting a suction port and a discharge port in a housing and irradiates ultraviolet light to the air sucked from the suction port.

[0003] In such a device, in order to form an air flow path in the housing, a flow path forming member is disposed in the housing, and the structure is complicated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide an air treatment device capable of simplifying the structure.

Means for Solving the Problems

[0006] The air treatment device of the embodiment includes an external housing, an internal housing, a first port, a second port, an air treatment unit, and an air flow path. The external housing can be installed on the installation surface of the space. The internal housing is detachably attached to the external housing. The first port is provided in the internal housing and is opened to the space in a state where the internal housing is installed in the external housing, and air flows through it. The second port is provided in the external housing and air flows through it. The air treatment unit is provided in the internal housing and has a photocatalyst filter and an ultraviolet light source. The air flow path passes through the first port, an outer path sandwiched between the external housing and the internal housing, the air treatment unit, and the second port.

Effects of the Invention

[0007] According to the air treatment apparatus of this embodiment, it is expected that the structure can be simplified. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of an air treatment device showing one embodiment. [Figure 2] This is a perspective view of the main body of the air treatment device shown above. [Figure 3] This is a disassembled perspective view of the main unit and processing unit of the same device. [Figure 4] This is a disassembled perspective view of the main unit and processing unit of the same device. [Figure 5] This is a cross-sectional view of the main body of the same device. [Figure 6] This is a disassembled cross-sectional view of the main unit and processing unit of the same device. [Figure 7] This is a cross-sectional view of the main body of the same device. [Figure 8] This is a disassembled perspective view of the same main unit. [Figure 9] This is a disassembled perspective view of the same main unit. [Figure 10] This is an exploded perspective view of the same processing unit. [Figure 11] This is an exploded perspective view of the same processing unit. [Figure 12] This is a perspective view of the same processing unit. [Figure 13] This is a perspective view of the same processing unit with the photocatalytic filter unit removed. [Figure 14] This is a perspective view of the holder for the photocatalytic filter shown above. [Figure 15] This is a plan view of the same holder. [Modes for carrying out the invention]

[0009] One embodiment will be described below with reference to the drawings.

[0010] Note that the air treatment device in the following embodiments is a device that performs any one of air treatments such as sterilization, disinfection, sterilization, bacteriostasis, deodorization, and odor elimination on the air flowing inside the air treatment device by a predetermined method. In the following, the treatment of the air treatment device will be described as a sterilization treatment, but the sterilization treatment can be interpreted by replacing it with a disinfection treatment, a sterilization treatment, a bacteriostasis treatment, a deodorization treatment, an odor elimination treatment, etc. Also, the air treatment function hereinafter refers to any one of the functions of sterilization, disinfection, sterilization, bacteriostasis, deodorization, and odor elimination. Further, the predetermined method here is light irradiation, photocatalyst, etc. Light irradiation means irradiating light with wavelengths such as the UV-C region, the UV-B region, the UV-A region, the visible light region, and the infrared region. A photocatalyst is a method in which active enzymes or OH radicals generated by irradiating light (ultraviolet light or visible light) on a photocatalyst such as titanium oxide disposed inside the air treatment device suppress the activities of bacteria, viruses, odor sources, etc. floating in the air, or decompose them into water and carbon dioxide.

[0011] FIG. 1 shows an air treatment device 10. This air treatment device 10 is installed in a semi-embedded state in an embedding hole formed in the installation surface of, for example, a room which is a space, and has an air treatment function for treating the air in the room and a lighting function for lighting the room. The semi-embedded state here means that at least a part of the air treatment device 10 is installed in the embedding hole so as to be located (exposed) on the room side from the installation surface. Note that the installation surface of the room may be any of a ceiling surface, a side wall surface, or a facade surface, and will be described as a ceiling surface in this embodiment. Also, hereinafter, the ceiling surface, the side wall surface, and the facade surface will be collectively referred to as a wall surface. The air treatment device 10 is installed in a semi-embedded state on the wall surface, and at least a part of it is located (exposed) in the room space where a person stays, which is one of the two spaces facing the wall surface.

[0012] The air treatment device 10 includes a device main body 11 and a power supply unit 12 that converts AC power from, for example, a commercial AC power supply into a predetermined power and supplies it to the device main body 11. The device main body 11 and the power supply unit 12 are electrically connected by a cable 13.

[0013] As shown in FIGS. 2 to 7, the apparatus main body 11 includes a main body unit 16 installed on the ceiling surface and a processing unit 17 detachably attached to the main body unit 16. The upper side of the apparatus main body 11 (the main body unit 16 and the processing unit 17) is an embedded region 11a embedded in the embedding hole on the ceiling surface, and the lower side is a lower region 11b which is an exposed region exposed from the ceiling surface into the room. Note that the embedded region 11a may be exposed above the ceiling surface (that is, on the ceiling back side).

[0014] The apparatus main body 11 includes an intake port 18 which is a first port 18a provided in a circumferential shape in the lower region 11b of the processing unit 17, an exhaust port 19 which is a second port 19a provided in a circumferential shape in the lower region 11b of the main body unit 16 and outside the intake port 18, an air treatment unit 20 provided in the processing unit 17, and an outer path 21 provided between the main body unit 16 and the processing unit 17. In the apparatus main body 11, an air flow path 22 inside the apparatus main body 11 connecting the intake port 18 and the exhaust port 19 is formed through the air treatment unit 20 and the outer path 21. The outer path 21 is a space sandwiched (surrounded) between the inner side surface of the main body unit 16 and the outer side surface of the processing unit 17. In the present embodiment, the first port 18a is the intake port 18 for sucking external air, and the second port 19a is the exhaust port 19 for discharging the air that has passed through the air treatment unit 20 to the outside. However, the second port 19a may be the intake port 18 for sucking external air, and the first port 18a may be the exhaust port 19 for discharging the air that has passed through the air treatment unit 20 to the outside.

[0015] The air treatment unit 20 is cylindrical with side wall surfaces, and openings are provided on the upper and lower surfaces. All of the upper and lower surfaces may be open, or a configuration in which a part of the upper and lower surfaces is open may be adopted. The upper and lower openings are openings for air to flow to the first port 18a and the second port 19a. Note that the air treatment unit 20 may be cylindrical or polygonal prism-shaped.

[0016] Figures 1 to 9 show the main unit 16. The main unit 16 includes an external housing 24, on which a fan 25, a guide member 26, and a control board 27 are installed.

[0017] The external housing 24 comprises a main body 30, a cover 31 attached to the main body 30, and a decorative frame 32 attached to the lower region 11b of the main body 30.

[0018] The main body 30 is made of, for example, resin, and comprises a cylindrical side portion 34 and an upper portion 35 that closes the upper side of the side portion 34, with the lower side being open. An annular flange portion 36, which forms the lower region 11b of the main body 30, is provided protruding from the lower side of the main body 30.

[0019] An opening 37 is formed in a part of the side portion 34 along the vertical direction. On one side of the opening 37 in the side portion 34, a wiring section 38 is provided through which wiring for electrically connecting the control board 27 and the fan 25 passes.

[0020] The cover portion 31 is made of sheet metal, for example, and comprises an annular upper plate portion 40 attached to the upper surface of the main body portion 30, and a side plate portion 41 positioned in and closing the opening 37 of the main body portion 30. The side plate portion 41 is provided with a wiring groove 42 through which a cable 13 for electrically connecting the power supply unit 12 and the control board 27 is inserted.

[0021] On the inner surface of the side plate portion 41, which faces into the main body portion 30 (the side opposite the main body portion 30), a retaining member 45 is attached that biases a wiring 44, which has a connector 43 at its tip for electrically connecting the control board 27 and the processing unit 17, toward the inner surface of the side plate portion 41, in the direction from the center of the main body portion 30 toward the side plate portion 41. In other words, the retaining member 45 biases and holds the wiring 44 toward the external housing 24 (particularly the inner surface of the external housing 24 that faces the processing unit 17). The retaining member 45 is, for example, a torsion spring, with coil portions 46 wound in a coil shape at both ends of a single spring wire, the outer ends of the coil portions 46 at both ends being screw-fixed to the side plate portion 41, and arm portions 47 extending from the inner ends of the coil portions 46 at both ends, located in the middle of the spring wire. The tip of the arm portion 47 has a wiring engagement portion 47a that is bent in a roughly L-shape to engage with the wiring 44. The wiring engagement portion 47a may hold the middle of the wiring 44 with a string or band. The coil portion 46 of the retaining member 45 is located on the lower side of the external housing 24, and the tip of the arm portion 47 can swing up and down within the external housing 24 with the coil portion 46 as the pivot point, and a spring force acts in the counterclockwise direction as shown in Figure 6.

[0022] Multiple mounting springs 48 for attaching the main unit 16 to the ceiling are attached to the outer surface of the main body 30.

[0023] The decorative frame 32 is made of, for example, resin, is formed in an annular shape with an opening in the center, and is attached to the lower side of the flange portion 36 of the main body portion 30. The decorative frame 32 comprises a cylindrical portion 51 that forms a central insertion opening 50, and an annular decorative surface portion 52 provided around the lower side of the cylindrical portion 51.

[0024] The upper surface of the decorative frame 32 is provided with an exhaust port forming region (first port forming region) 53 that forms an exhaust port 19 between it and the main body 30, and a control board housing region 54 that houses the control board 27 between it and the main body 30. The exhaust port forming region 53 is formed over a wider angle range in the circumferential direction of the external housing 24 than the area of ​​the control board housing region 54. Furthermore, the sum of the angle of the exhaust port forming region 53 in the circumferential direction of the external housing 24 and the angle of the area of ​​the control board housing region 54 in the circumferential direction of the external housing 24 is 360 degrees. Multiple fins 55 are erected in the exhaust port forming region 53 to control the flow of air exhausted from between it and the main body 30.

[0025] The cylindrical portion 51 is provided with a detachable groove 56 in a part of its circumference, and a mounting groove 57 is provided in communication with one side of the detachable groove 56 in the circumferential direction. The lower edge of the mounting groove 57 protrudes above the lower edge of the detachable groove 56 and toward the center of the insertion opening 50.

[0026] A positioning section 58 for positioning the processing unit 17 is provided on the inner circumferential surface of the cylindrical section 51. This positioning section 58 comprises a radial positioning section 58a for positioning the radial position on the inner circumferential surface, and an insertion positioning section 58b that protrudes inward in the radial direction from the upper side of the radial positioning section 58a for positioning the insertion position of the processing unit 17.

[0027] The surface of the decorative surface 52 is provided with attachment / detachment marks 59a, for example, a "△" mark, indicating the attachment / detachment position when attaching / detaching the processing unit 17 to the main unit 16, and attachment marks 59b, for example, a "〇" mark, indicating the position when the processing unit 17 is attached to the main unit 16. Furthermore, in the portion of the decorative surface 52 that overlaps with the area of ​​the control board housing 54 when viewed from above, a detection hole 60 and two monitor holes 61 are provided.

[0028] The lower region 11b of the external housing 24 is divided into an upper side, which is on the main body 30 side, and a lower side, which is on the decorative frame 32 side. At the upper position of the lower region 11b corresponding to the area of ​​the control board housing 54, that is, on the circumferential surface of the flange portion 36 on the main body 30 side, a flat portion 62 is provided, which is shaped by cutting a straight line out of the circumferential surface (see mainly Figure 4). Two operating holes 63 are provided in this flat portion 62, spaced apart in the circumferential direction of the flange portion 36, and a projection 64 protrudes between the two operating holes 63. At the position of the flat portion 62, the lower side of the lower region 11b, that is, the decorative frame 32 side, is circumferentially provided. The tip surface of the projection 64 in the direction of projection is on approximately the same plane as the circumferential surface of the lower side of the lower region 11b, that is, the circumferential surface on the decorative frame 32 side. In other words, the protruding portion 64 is provided such that the outer circumference of the decorative frame 32 and the outer circumference of the tip surface of the protruding portion 64 overlap (coincide) when viewed from above.

[0029] Furthermore, the fan 25 is attached to the underside of the upper surface 35 of the main body 30 by screws and is located in the upper part of the main body 30. The fan 25 is, for example, a centrifugal fan, which draws in air from the central area of ​​the lower surface by the rotation of its impeller and discharges it from the circumferential surface.

[0030] Furthermore, the guide member 26 is made of metal, such as die-cast aluminum, and is formed in an annular shape with an open center. The guide member 26 may also be made of resin or the like. The guide member 26 is positioned around the fan 25 and is attached to the underside of the upper surface 35 of the main body 30 by screws. The guide member 26 is equipped with an inclined air guide section 65 that directs the air discharged from around the fan 25 toward the bottom of the external housing 24.

[0031] The guide member 26 also serves as a support member for the processing unit 17, which is detachably attached to the main unit 16. The guide member 26 is provided with two support portions 66 located opposite each other in the diametrical direction (see mainly Figure 8). These support portions 66 protrude downward from the guide member 26 and also protrude toward the center of the guide member 26. One side of the support portion 66 in the circumferential direction is open, and the other side is closed. The lower edge of the open side of the support portion 66 is provided with a retaining portion 67 that protrudes upward. Furthermore, the open sides of the two support portions 66 are configured to coincide. For example, if the rearmost side of one support portion 66 in the circumferential direction, clockwise, is open, then the rearmost side of the other support portion 66 in the circumferential direction, clockwise, is also open. In addition, there may be three or more support portions.

[0032] Furthermore, the control board 27 is located in the lower region 11b of the external housing 24, specifically in the control board housing 54 between the flange portion 36 of the main body 30 and the decorative frame 32. The control board 27 receives power supplied from the power supply unit 12 via cable 13, supplies power to the fan 25 through fan wiring for control, and also includes a control circuit that supplies power to the processing unit 17 (ultraviolet light source and visible light source) through wiring 44 for control.

[0033] The control circuit includes a human presence sensor 69 for detecting human bodies, two monitor lamps 70 for displaying the status of the air treatment device 10, and two operating units 71 and 72 for switching the operating mode of the air treatment device 10.

[0034] The motion sensor 69 is positioned opposite the detection hole 60 of the decorative frame 32 to detect the presence or absence of a human body in the area below the air treatment device 10, as well as the movement of a human body. The two monitor lamps 70 are positioned opposite the two monitor holes 61 of the decorative frame 32, respectively, and display the operating status of the air treatment device 10 by the color of the light emitted, whether it is lit, off, or flashing.

[0035] The operating units 71 and 72 are, for example, slide switches, and are positioned opposite the operating holes 63 of the flat section 62. They are configured to be slid laterally along the flat section 62 via the operating holes 63 while in their position. The operating units 71 and 72 are positioned inward from the outer circumferential surface of the decorative frame 32, which is below the lower region 11b in the top view shown in Figure 7. In other words, when the air treatment device 10 is installed on the ceiling, the operating units 71 and 72 are configured not to be visible when viewed from directly below the air treatment device 10. For example, the operating units 71 and 72 can be switched between multiple stages by sliding, and the name of the switched mode corresponding to the switching position of the operating units 71 and 72 may be displayed on the flat section 62.

[0036] The control board 27 is electrically connected to an installation detection switch 73 that detects when the processing unit 17 is installed in a predetermined mounting position on the main unit 16. The installation detection switch 73 is located in the mounting groove 57 of the decorative frame 32. The control circuit of the control board 27 enables the supply of power to the fan 25 and the ultraviolet light source unit 78 when the installation detection switch 73 detects that the processing unit 17 has been installed. Conversely, it controls the supply of power to the fan 25 and the ultraviolet light source unit 78 when the installation detection switch 73 does not detect that the processing unit 17 has been installed, or when the detection state changes. In other words, the control board 27 controls the system so that when the processing unit 17 is removed from the main unit 16, power is not supplied to the fan 25, the visible light source unit 76, and the ultraviolet light source unit 78 (details will be described later) that are equipped with the processing unit 17. When the processing unit 17 is removed from the main unit 16, it is desirable that at least power is not supplied to the ultraviolet light source unit 78. This configuration prevents ultraviolet light from being irradiated to the person removing the processing unit 17. Alternatively, the system may be configured to supply power to the visible light source unit 76 even when the processing unit 17 is removed from the main unit 16. This configuration helps to prevent a decrease in work efficiency due to the room becoming dark during the removal of the processing unit 17.

[0037] Furthermore, Figures 2 to 7 and 10 to 13 show the processing unit 17. The processing unit 17 includes an internal housing 75, in which a visible light source unit 76, a dust filter 77, an ultraviolet light source unit 78, a photocatalytic filter unit 79, and the like are arranged.

[0038] The internal housing 75 includes a processing housing section 81, an upper frame member 82 is attached to the upper side of the processing housing section 81, and a lower frame member 83 is attached to the lower side of the processing housing section 81.

[0039] The processing housing 81 is made of metal, such as aluminum die-cast, and is formed by dividing it into two radial sections, which are then assembled into a cylindrical shape and fastened together with screws to form a single unit.

[0040] The processing housing 81 is cylindrical with a through section connecting its upper and lower circular surfaces, and the interior of the processing housing 81, which is the through section, is configured as the air processing unit 20. The lower surface of the through section has an intake-side opening 84, which is a first port-side opening communicating with the intake port 18, and the upper surface of the through section has an exhaust-side opening 85, which is a second port-side opening communicating with the exhaust port 19. The intake-side opening 84 and the exhaust-side opening 85 are connected via the air processing unit 20. In a plane perpendicular to the line segment extending from the intake-side opening 84 to the exhaust-side opening 85, the cross-sectional area (opening area) of the exhaust-side opening 85 is smaller than the cross-sectional area (opening area) of the intake-side opening 84.

[0041] The inner surface of the processing housing 81 facing the air processing unit 20 is formed on a surface with high light reflectivity, such as a mirror surface. Alternatively, a cylindrical reflector, whose inner surface is formed on a surface with high light reflectivity, such as a mirror surface, may be placed inside the inner circumferential surface of the processing housing 81. In this case, a wiring space may be provided between the inner circumferential surface of the processing housing 81 and the outer circumferential surface of the reflector for passing wiring that is electrically connected to the visible light source unit 76 and the ultraviolet light source unit 78.

[0042] A cylindrical portion 86 protrudes from the upper side of the processing housing portion 81, and two engaging portions 87 protrude outward from the upper side of this cylindrical portion 86 at opposite locations in the diametrical direction. The two engaging portions 87 are positioned at a height that allows them to overcome the retaining portion 67 of the support portion 66 when the processing unit 17 is inserted to its innermost position within the main unit 16. When the processing unit 17 is rotated within the main unit 16 in a predetermined mounting rotation direction (for example, counterclockwise when viewed from above), the two engaging portions 87 overcome the retaining portion 67 and engage with the support portion 66. In this state, if the support of the processing unit 17 is removed (for example, if the processing unit 17 is attached by hand, release your hands), gravity causes the engaging portions 87 of the processing unit 17 to be positioned below the height of the retaining portion 67 of the support portion 66. Therefore, the processing unit 17 will not detach from the support portion 66 unless a person lifts and rotates the processing unit 17. In other words, safety can be improved because it is possible to prevent the processing unit 17 from unintentionally detaching from the main unit 16. Furthermore, below the engaging portion 87, a retaining spring 88 is provided that contacts the lower surface of the support portion 66 and holds the support portion 66 by sandwiching it between the engaging portion 87 and the support portion 66.

[0043] On the upper side of the cylindrical portion 86, holder mounting portions 89 for attaching the photocatalytic filter unit 79 are provided at two locations opposite to the diametrically opposed positions, distinct from the two engaging portions 87. These holder mounting portions 89 have recesses 90 that are recessed on the outer diameter side of the inner circumferential surface of the cylindrical portion 86, and these recesses 90 are provided along the vertical direction of the cylindrical portion 86, with mounting holes 91 provided in these recesses 90 (see mainly Figure 13).

[0044] The upper frame member 82 is made of, for example, resin and is formed in an annular shape with an open center. The upper frame member 82 is arranged around the cylindrical portion 86 and attached to the upper surface of the processing housing portion 81. A part of the outer circumference of the upper frame member 82 is cut out, and a connector 92 (for example, a female connector) is attached to this location. One end each of the wiring for the visible light source and the wiring for the ultraviolet light source, which are electrically connected to the visible light source unit 76 and ultraviolet light source unit 78 respectively, are electrically connected to this connector 92. The other end of the wiring for the visible light source passes inside the processing housing portion 81, is pulled out downward from the lower frame member 83, and is electrically connected to the visible light source unit 76. The other end of the wiring for the ultraviolet light source is electrically connected to the ultraviolet light source unit 78 within the processing housing portion 81. Each wire is covered with an insulating material with excellent ultraviolet resistance at least the portion exposed to the air processing unit 20 within the processing housing 81, and if a cylindrical reflector is placed inside the inner circumferential surface of the processing housing 81, the wire is routed through the wiring space between the inner circumferential surface of the processing housing 81 and the outer circumferential surface of the reflector.

[0045] The lower frame member 83 is made of, for example, resin and is formed in an annular shape with an open center. The lower frame member 83 has a guide surface portion 93 that is conically shaped and slopes downward, and an air intake port 18 is formed between this guide surface portion 93 and the visible light source unit 76. The guide surface portion 93 guides the air towards the air processing unit 20.

[0046] The guide surface portion 93 is provided with mounting holes 94 at two locations opposite each other in the diametrical direction for detachably attaching a visible light source unit 76.

[0047] The guide surface portion 93 is provided with a "△" mark detachment mark 95 indicating the detachable position and mounting position of the processing unit 17 relative to the main unit 16. The processing unit 17 can be attached to and detached from the main unit 16 when the detachment mark 95 is rotated to coincide with the detachment mark 59a on the main unit 16. When the processing unit 17 is rotated so that the detachment mark 95 coincides with the mounting mark 59b on the main unit 16, the two engaging portions 87 engage with the two support portions 66 on the main unit 16 and are attached.

[0048] An annular positioning portion 96 protrudes from the upper surface of the lower frame member 83, which engages with the positioning portion 58 of the lower frame member 83 on the external housing 24 side to position it.

[0049] A detachable guide portion 97 is provided protruding from the outer circumferential surface of the positioning portion 96. The detachable guide portion 97 can be inserted into and removed from the detachable groove portion 56 of the decorative frame 32 when the detachable mark 95 is rotated to a position where it aligns with the detachable mark 59a on the main unit 16 side. It can also be rotated into the mounting groove portion 57 by rotating the processing unit 17 so that the detachable mark 95 aligns with the mounting mark 59b on the main unit 16 side. The detachable guide portion 97 is provided with a switch operating portion 97a that switches the mounting detection switch 73 when it is rotated into the mounting groove portion 57, and a stopper portion 97b that abuts against the lower side wall of the mounting groove portion 57 to restrict the rotation of the processing unit 17 in the mounting rotation direction.

[0050] Furthermore, the visible light source unit 76 includes a visible light source 98, a mounting member 99 on which the visible light source 98 is positioned, a visible light source holder 100 that holds the visible light source 98 and is attached to the mounting member 99, and a visible light source cover 101 that covers the visible light source 98. The visible light source unit 76, assembled as a single unit, is detachably attached to the lower frame member 83 of the internal housing 75.

[0051] The visible light source 98 is composed of a light source module comprising a disc-shaped substrate 102, a plurality of light-emitting elements 103 that emit visible light mounted on the substrate 102, and a connector 104 mounted on the substrate 102. The other end of the wiring for the visible light source, one end of which is connected to the connector 92, is electrically connected to the connector 104. The wiring for the visible light source is pulled out from the connector 92 through the processing housing 81 to below the lower frame member 83, and is electrically connected to the connector 104 by inserting the mounting member 99.

[0052] The mounting member 99 has a recess 105 in the center of its lower surface for housing and positioning the visible light source 98 and the visible light source holder 100, and a guide surface portion 106 is provided circumferentially around this recess 105. The guide surface portion 106 is provided circumferentially with a roughly U-shaped cross-section facing upward, and the concave portion on the upper side functions as a dust receiving portion that catches dust falling from the dust filter 77 when the fan 25 stops. Spacer portions 107 are provided projecting upward from two locations on the upper periphery of the guide surface portion 106 that are opposite each other in the diametrical direction, and mounting claw portions 108 are provided projecting upward from two locations on the diametrically opposite to the two space portions 107. The two spacer portions 107 abut against the guide surface portion 93 of the lower frame member 83, and the two mounting claw portions 108 engage with the mounting holes 94 of the lower frame member 83 to attach them, thereby forming a circumferential gap between the guide surface portion 93 of the lower frame member 83 and the guide surface portion 106 of the mounting member 99 that communicates with the air processing unit 20, and this gap is configured as an air intake port 18.

[0053] The visible light source holder 100 is formed in an annular shape with an opening in the center. The visible light source holder 100 holds the peripheral portion of the visible light source 98 and is attached by screwing it into the recess 105 of the mounting member 99.

[0054] The visible light source cover 101 allows light from the visible light source 98 to pass through and controls the light distribution of the transmitted light.

[0055] Furthermore, the dust filter 77 is made of, for example, wire mesh, and is installed with its peripheral portion sandwiched between the processing housing 81 and the lower frame member 83, and is positioned to cover the entire area of ​​the intake side opening 84 of the processing housing 81.

[0056] Furthermore, the ultraviolet light source unit 78 includes an ultraviolet light source 110, a heat dissipation block 111 on which the ultraviolet light source 110 is mounted, and an ultraviolet light source holder 112 that holds the ultraviolet light source 110 via the heat dissipation block 111. The ultraviolet light source unit 78 is mounted sandwiched between two divided processing housing sections 81, and is positioned on the lower side of the air processing section 20 of the internal housing 75.

[0057] The ultraviolet light source 110 is positioned above the intake-side opening 84 and in a location where it is hit by air entering from the intake-side opening 84. The ultraviolet light source 110 irradiates ultraviolet light (light in the ultraviolet region) upward into the air processing unit 20. The ultraviolet light source 110 is composed of a light-emitting module comprising a rectangular substrate 113, a light-emitting element 114 that emits ultraviolet light mounted on the substrate 113, and a wiring connection part 115 provided on the substrate 113. The light-emitting element 114 uses a first LED (sterilization LED) that emits ultraviolet light with a peak wavelength of 300 nm or less, preferably with a wavelength component of 200 to 280 nm, for sterilizing the air, and a second LED (photocatalytic LED) that emits light with a wavelength component of at least 360 nm to 420 nm, which is UV-A or visible light, for exciting the photocatalyst supported on the photocatalytic filter described later. The wavelength of light emitted by the first LED (germicidal LED) is shorter than the wavelength of light emitted by the second LED (photocatalytic LED). The wiring connection section 115 may be a pad on a wiring pattern to which the wiring for the ultraviolet light source is directly electrically connected, or it may be a connector.

[0058] The heat dissipation block 111 is made of metal, for example, and is formed in the shape of a long rectangular parallelepiped, with the substrate 113 of the ultraviolet light source 110 attached to its upper side. The heat dissipation block 111 may have irregularities (including minute irregularities that are not visible to the naked eye) formed on its surface to increase its surface area and improve heat dissipation performance.

[0059] The ultraviolet light source holder 112 is made of metal, for example, and is formed in an annular shape with an opening in the center. A heat dissipation block 111 on which an ultraviolet light source 110 is disposed is mounted on the ultraviolet light source holder 112 so as to traverse the central opening in the diametrical direction. Above the central opening of the ultraviolet light source holder 112, for example, three concentric light-shielding walls 112a are erected at intervals. The light-shielding walls 112a are supported at both ends in the circumferential direction by the ultraviolet light source holder 112, and the spaces between adjacent light-shielding walls 112a and the central opening are open in the vertical direction. The ultraviolet light source holder 112 is mounted sandwiched between two divided processing housing sections 81, and is positioned on the lower side of the air processing section 20 of the internal housing 75, with the central opening of the ultraviolet light source holder 112 communicating with the intake side opening 84 of the internal housing 75.

[0060] Furthermore, as shown in Figures 5 to 7 and Figures 10 to 15, the photocatalytic filter unit 79 comprises a photocatalytic filter 117, which is the object to be held, and a holder 118 that holds the photocatalytic filter 117 and is detachably attached to the internal housing 75. The photocatalytic filter unit 79 is detachably positioned inside the cylindrical portion 86 of the internal housing 75 from above.

[0061] The photocatalytic filter 117 is a circular block shape with multiple ventilation holes 119 that penetrate in the thickness direction. The photocatalytic filter 117 has a photocatalyst such as titanium dioxide held and coated on a support, and when it receives ultraviolet light or visible light with wavelength components of UV-A, for example from 360 nm to 420 nm, from an ultraviolet light source 110, it generates active oxygen and OH radicals, and the generated active oxygen and OH radicals decompose odor components in the air to deodorize and eliminate odors, or suppress the activity of viruses.

[0062] The holder 118 is made of, for example, a resin material. The holder 118 comprises an annular or cylindrical base portion 120 and mounting portions 121 projecting upward from two locations on the diametrically opposed side of the base portion 120.

[0063] The base portion 120 has an inner diameter larger than the diameter of the photocatalytic filter 117, allowing the photocatalytic filter 117 to be placed inside it.

[0064] On the lower side of the inner circumferential surface of the base portion 120, support portions 122 protrude at multiple locations in the circumferential direction to support the photocatalytic filter 117 which is positioned inside the base portion 120. The diameter of the virtual circle passing through the tip of the support portion 122 that protrudes furthest towards the center of the base portion 120 is smaller than the diameter of the photocatalytic filter 117, and supports the photocatalytic filter 117 positioned inside the base portion 120 in a downward position to prevent it from coming loose. There are, for example, three support portions 122, one of which is positioned midway between the two mounting portions 121 on the circumference of the base portion 120, and the remaining two are positioned at equal intervals in the circumferential direction of the base portion 120 relative to this one, so that the three support portions 122 are positioned differently from the mounting portions 121.

[0065] On the upper side of the inner circumferential surface of the base portion 120, two first protrusions 123 are provided at diametrically opposed locations, projecting outwards from the upper surface of the photocatalytic filter 117 supported on the support portion 122, and holding the photocatalytic filter 117 between the support portion 122 and the first protrusions 123. When no load is applied to the base portion 120, the distance between the two first protrusions 123 is shorter than the diameter of the photocatalytic filter 117, and the first protrusions 123 hold the photocatalytic filter 117 to the base portion 120 by holding it between the support portion 122 and the first protrusions 123. In other words, the first protrusions 123 support the photocatalytic filter 117, which is positioned inside the base portion 120, in an upward position to prevent it from coming loose. An inclined surface 124 is provided on the upper side of the first protrusions 123 to guide the photocatalytic filter 117, which is inserted into the holder 118 from above, between the two first protrusions 123.

[0066] On the lower side of the inner circumferential surface of the base portion 120, two second protrusions 125 are projected in a direction that intersects (perpendicular to) the direction connecting the two first protrusions 123, and their projection width from the inner circumferential surface of the base portion 120 is smaller than that of the first protrusions 123. The distance between the two second protrusions 125 is longer than the diameter of the photocatalytic filter 117. An inclined surface 126 is provided on the upper side of the second protrusions 125 to prevent the photocatalytic filter 117, which is inserted into the holder 118 from above, from getting caught on the second protrusions 125. The second protrusions 125 are positioned in a direction that applies load when attaching or detaching the photocatalytic filter 117. If excessive load is applied when removing the photocatalytic filter 117, the holder 118 may be damaged, or the photocatalytic filter 117 may become impossible to attach or detach. The second protrusions 125 also function as stoppers to prevent excessive load from being applied to the holder 118. In other words, when removing the photocatalytic filter 117, the load on the second protrusion 125 that contacts the photocatalytic filter 117 is limited to a maximum load.

[0067] On the lower side of the inner circumferential surface of the base portion 120, third protrusions 127 are projected on both sides in the direction connecting the two first protrusions 123, with a smaller projection width from the inner circumferential surface of the base portion 120 than the first protrusions 123. The distance between the two third protrusions 127 is longer than or equal to the diameter of the photocatalytic filter 117, and shorter than the distance between the two second protrusions 125. An inclined surface 128 is provided on the upper side of the third protrusions 127 to guide the photocatalytic filter 117, which is inserted into the holder 118 from above, between the two third protrusions 127.

[0068] The two mounting portions 121 include a rising portion 129 that rises from the base portion 120, a finger rest portion 130 that protrudes outward from the upper side of the rising portion 129, a guide rib 131 that protrudes from the outer surface side of the rising portion 129 and whose protruding width increases towards the upper side, and a claw portion 132 provided near the upper side of the guide rib 131.

[0069] The rising portions 129 of the two mounting portions 121 are capable of engaging with the recessed portions 90 of the two holder mounting portions 89 provided on the cylindrical portion 86 of the internal housing 75, and the finger rest portion 130 is capable of being positioned on the holder mounting portions 89.

[0070] The distance between the tips of the claws 132 of the two mounting parts 121 is longer than the distance between the inner surfaces of the recesses 90 of the two holder mounting parts 89. By pinching the two mounting parts 121 with your fingers and elastically deforming them to move closer together, the claws 132 of the two mounting parts 121 can be attached to and detached from the mounting holes 91 of the recesses 90 of the two holder mounting parts 89. In the attached state, an elastic force acts in the direction that the claws 132 engage with the mounting holes 91.

[0071] The holder 118 is attached to the cylindrical portion 86 of the internal housing 75 by the following mechanism: the rising portions 129 of the two mounting portions 121 engage with the recesses 90 of the two holder mounting portions 89 of the internal housing 75, and the base portion 120 is inserted from above into the cylindrical portion 86 of the internal housing 75. During the insertion process, the guide rib 131 contacts the recesses 90 of the holder mounting portions 89 and elastically deforms so that the two mounting portions 121 move closer together. Then, the upper claw portion 132 of the guide rib 131 engages with the mounting hole 91, and the holder is attached to the cylindrical portion 86 of the internal housing 75.

[0072] When no load is applied to the base portion 120, the holder 118 holds the photocatalytic filter 117, which has dimensions longer than the distance between the two first protrusions 123, in the base portion 120. When a load a is applied by pinching the base portion 120 with fingers from a direction intersecting the direction connecting the two first protrusions 123, the annular base portion 120 bends so that it spreads outward in the outer diameter direction b in the direction connecting the two first protrusions 123, causing the distance between the two first protrusions 123 to widen beyond the dimensions of the photocatalytic filter 117, thus creating a dimensional relationship that allows the photocatalytic filter 117 to be removed from above the base portion 120 (see Figure 15). Similarly, when attaching the photocatalytic filter 117 to the holder 118, the base portion 120 is bent so that the distance between the two first protrusions 123 widens, making attachment possible.

[0073] When the photocatalytic filter unit 79 is attached to the internal housing 75, the photocatalytic filter 117 is positioned to close the exhaust-side opening 85 of the internal housing 75, and the base portion 120 of the photocatalytic filter 117 and holder 118 is positioned to protrude into the air processing unit 20 of the internal housing 75. The base portion 120 of the photocatalytic filter 117 and holder 118 is positioned near the exhaust-side opening 85 such that at least a part of it overlaps with the exhaust-side opening 85 of the internal housing 75, and is a protruding portion 133 that protrudes toward the intake-side opening 84.

[0074] Next, the installation of the air treatment device 10 will be explained.

[0075] Power lines routed on the ceiling surface (behind the ceiling) are pulled out through the mounting holes and electrically connected to the power supply unit 12. The power supply unit 12 is then inserted into the mounting holes and placed on the ceiling surface (behind the ceiling). Multiple mounting springs 48 are inserted into the mounting holes in an elastically deformed state so as to conform to the side surface of the device body 11. By releasing the operation of the mounting springs 48, the multiple mounting springs 48 unfold on the ceiling surface due to spring force, pulling the device body 11 towards the ceiling surface, and the device is installed in a state where the flange portion 36 of the lower region 11b is in contact with the ceiling surface.

[0076] The embedded portion 11a of the main body of the device 11 is embedded in the ceiling surface, and the lower portion 11b is exposed from the ceiling surface, and is placed in a room which is the space below the ceiling surface. At least a visible light source unit 76, an air intake 18, and an exhaust 19 are arranged in the lower portion 11b.

[0077] Next, the operation of the air treatment device 10 will be explained.

[0078] The control board 27, which receives power from the power supply unit 12, supplies power to and controls the fan 25, the visible light source 98, and the ultraviolet light source 110.

[0079] When the visible light source 98 receives power and lights up, visible light is emitted into the room. The visible light source 98 can be placed inside the air intake 18 even when an air intake 18 is provided in the lower region 11b, by making the air intake 18 annular in shape.

[0080] As the fan 25, powered by electricity, rotates, the air in the room is circulated through the flow path 22 connecting the intake port 18 and the exhaust port 19. In other words, the air in the room is drawn into the air processing unit 20 through the intake port 18, dust filter 77, and intake-side opening 85 in the lower region 11b of the processing unit 17. The air drawn into the air processing unit 20 is treated by irradiation with ultraviolet light and by the action of a photocatalyst. Subsequently, it is drawn into the lower side of the fan 25 through multiple vent holes 119 and the exhaust-side opening 85 of the photocatalytic filter 117. The air discharged from the circumferential side of the fan 25 is guided by the air guide portion 65 of the guide member 26 towards the outer path 21 between the inner circumferential surface of the lower outer housing 24 and the outer circumferential surface of the inner housing 75, and is exhausted into the room through the exhaust port 19 via this outer passage 21.

[0081] On the airflow path 22, there is a region where the direction of airflow is 180 degrees different between a part of the airflow path 22 above the air processing unit 20 before it enters the fan 25 and a part of the airflow path 22 after it enters the fan 25.

[0082] In this way, a flow path 22 is formed, including an outer path 21 between the outer housing 24 and the inner housing 75 which can be attached to and detached inside the outer housing 24. Therefore, it is not necessary to arrange a flow path forming member inside the device to form the flow path 22, and the structure can be simplified.

[0083] Since the exhaust port 19 is positioned to face the side of the external housing 24, the air exhausted from the exhaust port 19 can easily flow over a wide area of ​​the room, thereby improving the air treatment effect in the room.

[0084] When the UV light source 110, which has been supplied with power, is turned on, UV light is irradiated into the inside of the air processing unit 20, and the air passing through the inside of the air processing unit 20 is sterilized.

[0085] Ultraviolet light from the ultraviolet light source 110 is also irradiated onto the photocatalytic filter 117, which is positioned opposite it. When the photocatalytic filter 117 is irradiated with ultraviolet light or visible light with wavelength components of at least 360 nm to 420 nm of UV-A from the ultraviolet light source 110, it generates active oxygen and OH radicals. The generated active oxygen and OH radicals decompose odor components in the air to deodorize and eliminate odors, and also suppress the activity of viruses.

[0086] Furthermore, the base portion 120 of the photocatalytic filter 117 and holder 118, which are protruding portions 133 of the air processing unit 20, protrude toward the intake port opening 84 so as to close the exhaust port opening 85. As a result, a stagnant space 135 is formed on the upper side of the air processing unit 20 between the side wall surface of the air processing unit 20 and the area around the base portion 120 of the photocatalytic filter 117 and holder 118, where vortices are generated in the airflow (see Figure 5).

[0087] A portion of the air drawn in through the intake opening 84 remains in the stagnation space 135 as a vortex before being exhausted to the fan 25 side through the vent holes 119 of the photocatalytic filter 117. This stagnation of airflow allows the air to stay in the air processing unit 20 for a longer period, which in turn allows for longer exposure to ultraviolet light from the ultraviolet light source 110 and longer exposure to the photocatalyst, thereby improving the air treatment effect.

[0088] Because the cross-sectional area of ​​the exhaust-side opening 85 of the air processing unit 20 is smaller than the cross-sectional area of ​​the intake-side opening 84, and because the photocatalytic filter 117 is arranged to block the exhaust-side opening 85, air vortices are more easily generated in the stagnant space 135, allowing the airflow to be retained.

[0089] The ultraviolet light source 110 is positioned above the intake-side opening 84 and in a location where it is struck by the air entering from the intake-side opening 84. This obstructs the air entering from the intake-side opening 84 from flowing directly to the exhaust-side opening 85, making it easier to create a stagnant airflow.

[0090] Furthermore, by configuring the air entering from the intake opening 84 to hit the ultraviolet light source 110, it is possible to make it easier to dissipate heat from the ultraviolet light source 110, and it is expected that the temperature of the ultraviolet light source 110 will be reduced.

[0091] Furthermore, the air treatment device 10 controls its operation using a control circuit on the control board 27 based on the detection by the human presence sensor 69. When the human presence sensor 69 detects a human body entering the detection area, it turns on the visible light source 98, rotates the fan 25, and turns on the ultraviolet light source 110. The visible light source 98 can be switched on and off, the fan 25 can be turned on and off, and the ultraviolet light source 110 can be switched on and off by operating the operation units 71 and 72 to select an operating mode.

[0092] The operating modes include a mode for switching the illuminance of the visible light source 98 between "bright," "off," and "dim," a mode for switching the airflow of the fan 25 between "strong" and "weak," and a multi-stage mode for switching the time in which the human presence sensor 69 detects a human body and turns off the visible light source 98, and the time in which the fan 25 stops and the ultraviolet light source 110 turns off. One of these modes is set on each of the control units 71 and 72.

[0093] Since the operating sections 71 and 72 are located on the sides of the lower region 11b that is exposed to the room, they can be easily switched. Operation does not require removing the processing unit 17. Furthermore, since the operating sections 71 and 72 are located on a flat section 62 provided on a part of the circumferential surface of the lower region 11b, they are easy to operate.

[0094] Furthermore, since a flat surface 62 is provided on the upper side of the lower region 11b, and the lower side of the lower region 11b is provided in an arc shape, when looking up at the lower region 11b which is positioned on the ceiling surface, the operating parts 71 and 72 are hidden by the lower region 11b, improving the aesthetic appearance. In addition, since the existence of the operating parts 71 and 72 cannot be seen by someone who is unfamiliar with the structure of the device, it is also possible to prevent tampering.

[0095] Furthermore, because the lower circumferential portion of the lower region 11b protrudes above the flat portion 62, there is a risk that fingers or other objects may get caught, applying a downward load to the decorative frame 32 on the lower side of the lower region 11b. If a downward load is applied to the decorative frame 32, a force will be applied in the direction that removes the decorative surface portion 52, which may detach and break. In this embodiment, the protrusion 64 protrudes from the flat portion 62, which prevents fingers or other objects from getting caught on the lower circumferential portion of the lower region 11b. For example, when operating the operating parts 71 and 72, it is possible to prevent a downward load from being applied to the decorative frame 32 on the lower side of the lower region 11b. Moreover, since the protrusion 64 protrudes between the two operating parts 71 and 72 of the flat portion 62, it is possible to prevent accidentally operating the other operating part when operating one of them.

[0096] Furthermore, the status of the air treatment device 10 can be checked by observing the display on the monitor lamp 70 located in the lower area 11b. The monitor lamp 70 displays, for example, abnormalities, air treatment in progress (sterilization in progress), replacement time for the photocatalytic filter 117, and the lifespan of the ultraviolet light source 110, through the color of the light emitted, as well as by whether it is lit, off, or blinking.

[0097] Furthermore, the photocatalytic filter 117 accumulates dirt over time, affecting its processing capacity, so it is preferable to clean it periodically. In this case, the processing unit 17 will need to be removed from the main unit 16 for the cleaning.

[0098] To remove the processing unit 17 from the main unit 16, push the processing unit 17 upwards and rotate it in the removal direction (counterclockwise when viewed from below) so that the attachment / detachment mark 95 on the processing unit 17 moves from the position of the attachment / detachment mark 59b on the main unit 16 to the position of the attachment / detachment mark 59a.

[0099] By pushing up the processing unit 17, the engaging portion 87 of the processing unit 17 moves to a height where it does not interfere with the retaining portion 67 of the support portion 66 of the main unit 16, or to a height sufficient for the engaging portion 87 to overcome the retaining portion 67. In this state, by rotating the processing unit 17 in the removal direction, the engaging portion 87 is released from the support portion 66 through one of the openings, and the attachment / detachment guide portion 97 moves from the mounting groove portion 57 to the attachment / detachment groove portion 56.

[0100] When the attachment / detachment guide portion 97 moves from the mounting groove portion 57 to the attachment / detachment groove portion 56, the mounting detection switch 73 is turned off, and the mounting of the processing unit 17 is no longer detected. Therefore, even when power is supplied to the air processing device 10, the control circuit of the control board 27 controls the supply of power to the fan 25 and the ultraviolet light source unit 78.

[0101] The processing unit 17 is supported and moved downward, then removed from the main unit 16. The processing unit 17 is connected to the main unit 16 by wiring 44, but when the processing unit 17 is moved downward, the wiring 44 is pulled, causing the arm portion 47 of the retaining member 45 to swing downward against the biasing force, allowing the processing unit 17 to be removed from the main unit 16. The connector 43 of the wiring 44 is disconnected from the connector 92 of the processing unit 17 that has been removed from the main unit 16. The disconnected wiring 44 is pulled upward by the arm portion 47 due to the biasing force of the retaining member 45 and pressed against the inner surface of the external housing 24.

[0102] To remove the photocatalytic filter 117 from the processing unit 17, the finger grips 130 of the two mounting parts 121 of the holder 118 are pinched with the fingers and elastically deformed so that they move closer together, thereby disengaging the claws 132 of the two mounting parts 121 from the mounting holes 91 of the recessed parts 90 of the two holder mounting parts 89. In this state, the holder 118 is then pulled upward to remove it from the internal housing 75.

[0103] By pinching the base portion 120 with your fingers from a direction intersecting the direction connecting the two first protrusions 123 of the removed holder 118 and applying a load a, the annular base portion 120 will bend so that it spreads outward in the outer diameter direction b in the direction connecting the two first protrusions 123, and the distance between the two first protrusions 123 will become wider than the dimensions of the photocatalytic filter 117, allowing the photocatalytic filter 117 to be moved above the base portion 120 and removed. The removed photocatalytic filter 117 is then washed.

[0104] To attach a cleaned photocatalytic filter 117, or a new photocatalytic filter 117 to be replaced, to the holder 118, the photocatalytic filter 117 is placed in the inner area of ​​the base portion 120 from above and pushed in from above. This pushes the photocatalytic filter 117 outward in the direction b connecting the two first protrusions 123, causing the photocatalytic filter 117 to overcome the two first protrusions 123, and thus it is sandwiched and held between the support portion 122 and the first protrusions 123. The circumferential surface of the photocatalytic filter 117 faces the two second protrusions 125 and is held in contact with the two third protrusions 127, suppressing horizontal rattling of the photocatalytic filter 117.

[0105] To attach the assembled photocatalytic filter unit 79 to the internal housing 75, the raised portions 129 of the two mounting portions 121 of the holder 118 are engaged with the recessed portions 90 of the two holder mounting portions 89 of the internal housing 75, and the base portion 120 is inserted from above into the cylindrical portion 86 of the internal housing 75. During this insertion process, the guide rib 131 elastically deforms as it contacts the recessed portions 90 of the holder mounting portions 89, bringing the two mounting portions 121 closer together. Then, the upper claw portion 132 of the guide rib 131 engages with the mounting hole 91, and the finger rest portion 130 of the mounting portion 121 engages with the upper side of the holder mounting portion 89, thereby attaching it to the cylindrical portion 86 of the internal housing 75.

[0106] Furthermore, to remove the dust captured in the dust filter 77 of the removed processing unit 17, the visible light source unit 76 is removed from the internal housing 75. The visible light source unit 76 can be removed from the internal housing 75 by pushing the two mounting claws 108 of the mounting member 99 of the visible light source unit 76 toward the center and releasing them from the mounting holes 94 of the internal housing 75. With the wiring for the visible light source still connected to the internal housing 75, the removed visible light source unit 76 is slid to the side from the internal housing 75 to expose the dust filter 77, and the dust is removed by vacuuming or similar. After removing the dust, the visible light source unit 76 is reattached to the internal housing 75 by pushing the two mounting claws 108 of the mounting member 99 of the visible light source unit 76 into the two mounting holes 94 of the internal housing 75 and engaging them. Note that cleaning the dust filter 77 can also be performed by removing the visible light source unit 76 even when the processing unit 17 is attached to the main unit 16.

[0107] Furthermore, to attach the removed processing unit 17 to the main unit 16, the connector 43 is taken from inside the main unit 16 and the wiring 44 is pulled downward, and below the main unit 16, the connector 43 is connected to the connector 92 of the processing unit 17. Along with the pulled-out wiring 44, the arm portion 47 of the retaining member 45 swings downward against the biasing force.

[0108] Align the attachment / detachment mark 95 of the processing unit 17 with the attachment / detachment mark 59a of the main unit 16, and insert the processing unit 17 into the main unit 16. If the insertion position of the processing unit 17 relative to the main unit 16 is correct, the attachment / detachment guide portion 97 of the processing unit 17 will pass through the attachment / detachment groove portion 56 of the main unit 16, allowing the processing unit 17 to be inserted to its innermost position within the main unit 16. On the other hand, if the insertion position of the processing unit 17 relative to the main unit 16 is incorrect, the attachment / detachment guide portion 97 of the processing unit 17 will not align with the attachment / detachment groove portion 56 of the main unit 16, and the processing unit 17 will not be able to be inserted to its innermost position within the main unit 16, resulting in the lower side of the processing unit 17 protruding downwards from the main unit 16. In this state, the processing unit 17 may be rotated to align the attachment / detachment guide portion 97 of the processing unit 17 with the attachment / detachment groove portion 56 of the main unit 16 and allow it to pass through.

[0109] As the processing unit 17 is inserted into the main unit 16, the wiring 44 will become loose. However, the biasing force of the retaining member 45 causes the arm portion 47 to pull the wiring 44 upward and press it against the inner surface of the external housing 24, thereby preventing the wiring 44 from becoming tangled or caught.

[0110] When the processing unit 17 is inserted to its innermost position within the main unit 16, the positioning portion 96 of the processing unit 17 contacts the insertion positioning portion 58b of the positioning portion 58 of the main unit 16, thereby positioning it. In this state, the engaging portion 87 of the processing unit 17 is positioned above the retaining portion 67 of the support portion 66 of the main unit 16.

[0111] The processing unit 17 is rotated in the mounting direction (clockwise when viewed from below) so that the attachment / detachment mark 95 of the processing unit 17 moves from the position of the attachment / detachment mark 59a on the main unit 16 to the position of the mounting mark 59b. As a result, the engaging portion 87 of the processing unit 17 moves onto the support portion 66 of the main unit 16, and the attachment / detachment guide portion 97 moves from the attachment / detachment groove portion 56 to the mounting groove portion 57. The rotation of the processing unit 17 in the mounting direction is restricted at a predetermined mounting position by the engaging portion 87 contacting the side wall of the support portion 66 opposite to the opening side, and the stopper portion 97b of the attachment / detachment guide portion 97 contacting the lower side wall of the mounting groove portion 57.

[0112] By releasing the upward push of the processing unit 17, the engaging portion 87 of the processing unit 17 rests on and is supported by the support portion 66 of the main unit 16, and the anti-detachment portion 67 prevents it from coming off the support portion 66.

[0113] When the processing unit 17 is installed in the predetermined mounting position, the attachment / detachment guide section 97 moves to the position of the mounting groove section 57, turning on the installation detection switch 73 and detecting the installation status of the processing unit 17. As a result, the control circuit of the control board 27 enables the supply of power to the fan 25 and the ultraviolet light source unit 78.

[0114] Furthermore, the biasing force of the pressing member 45 pulls the wiring 44 upward with the arm portion 47 and presses it toward the inner surface of the external housing 24, thereby reducing slack in the wiring 44. As a result, even if the wiring 44 is positioned in the flow path 22, the movement of the wiring 44 due to airflow can reduce entanglement and obstruction of the airflow in the flow path 22.

[0115] As described above, in the air treatment device 10 of this embodiment, an intake port 18 (first port 18a) is provided circumferentially in the lower region 11b that is exposed to the room when installed, and an exhaust port 19 (second port 19a) is provided circumferentially outside the intake port 18. The intake port 18 and the exhaust port 19 are connected by a flow path 22, and an air treatment unit 20 is provided on this flow path 22 above the intake port 18. The air treatment unit 20 has an ultraviolet light source 110 that irradiates ultraviolet light upward and a photocatalytic filter 117 located above the ultraviolet light source 110, thereby suppressing protrusion into the room and ensuring reliable air treatment.

[0116] The fan 25 is located above the air processing unit 20 on the airflow path 22, and there are regions where the direction of airflow differs by 180 degrees between a portion of the airflow path 22 before it enters the fan 25 and a portion of the airflow path 22 after it enters the fan 25. This suppresses protrusion into the room and ensures reliable air processing.

[0117] The air treatment device 10 may also be configured without a visible light source unit 76. In this case, the space where the visible light source unit 76 would be located would be a cavity, and the device may be configured to close off this cavity with a predetermined component. Alternatively, another functional component may be placed in place of the visible light source unit 76. Examples of such other functional components include a display, speaker, projector, or fragrance unit that emits odors.

[0118] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0119] 10 Air treatment equipment 18a 1st mouth 19a Second Entrance 20 Air Processing Unit 21 Outer path 22 Flow channels 24 External enclosure 75 Internal enclosure 110 UV light source 117 Photocatalytic Filter

Claims

1. An external enclosure that can be installed on the surface of the space to be installed; An internal housing that is detachably attached to the external housing; A first opening through which air flows is provided in the internal housing and is open to the space when the internal housing is installed in the external housing; The external housing is provided with a second port through which air flows; An air processing unit is provided in the aforementioned internal housing and includes a photocatalytic filter and an ultraviolet light source; The outer path sandwiched between the outer housing and the inner housing; The first port is in communication with the air processing unit, the air processing unit is in communication with the outer path, and the outer path is in communication with the second port, so that air flows in the order of the first port, the air processing unit, the outer path and the second port, or in the reverse order; The support portion provided on the external housing side; Equipped with, The internal housing is supported by the support portion by rotating within the external housing. An air treatment device characterized by the following:

2. The support portion is provided with an anti-detachment portion that protrudes upward, The aforementioned internal housing has an engaging portion, The engaging portion engages with the support portion by overcoming the retaining portion as the inner housing rotates within the outer housing. The air treatment apparatus according to claim 1, characterized by its features.

3. The second opening is an opening directed to the side of the external housing. The air treatment apparatus according to claim 1, characterized by its features.

4. The internal housing is provided with a visible light irradiation unit that irradiates the space with visible light. An air treatment apparatus according to any one of claims 1 to 3, characterized by the above.

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