Air treatment device

Abstract

To provide an air treatment device that can suppress the influence due to suction of discharged treated air.SOLUTION: An air treatment device 10 is equipped with an air treatment portion 20, an air suction port 18, an air discharge port 19, a flow passage 22, and an ozone generator 28. The air treatment portion 20 includes a photocatalyst and an ultraviolet light source 110. The air suction port 18 introduces air into the air treatment potion 20. The air discharge port 19 is disposed concentrically with the air suction port 18 and discharges the air treated in the air treatment portion 20. The flow passage 22 allows air to flow through the air suction port 18, the air treatment portion 20, and the air discharge port 19. The ozone generator 28 is provided closer to the air discharge port 19 than the air treatment portion 20 in the flow passage 22, and supplies ozone to the air passing through the flow passage 22. A metal member 130 is disposed between the air suction port 18 and the ozone generator 28 in the flow passage 22.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Embodiments of the present invention relate to an air treatment device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is an air treatment device that draws in outside air through an air intake port, treats it, and exhausts the treated air to the outside through an exhaust port.

[0003] In such air treatment devices, if the intake and exhaust ports are located close to each other, some of the treated air exhausted from the exhaust port is sucked in through the suction port, and depending on the type of air treatment, the sucked in treated air may affect components placed within the device (e.g., cause deterioration of components placed within the device). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-62344 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 an air treatment device capable of suppressing the effects of inhaling exhausted treatment air. [Means for solving the problem]

[0006] The air treatment device of the embodiment includes an air treatment unit, an intake port, an exhaust port, a flow path, and an ozone generator. The air treatment unit has a photocatalyst and an ultraviolet light source. The intake port guides air to the air treatment unit. The exhaust port is arranged concentrically with the intake port and exhausts air treated by the air treatment unit. The flow path is such that air passes through the intake port, the air treatment unit, and the exhaust port. The ozone generator is provided on the flow path closer to the exhaust port than the air treatment unit, and supplies ozone to the air passing through the flow path. A metal member is arranged in the flow path between the intake port and the ozone generator. Effect of the Invention

[0007] According to the embodiment, it is expected that the influence of sucking in the exhausted process air can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of an air treatment device according to one embodiment; [Diagram 2] FIG. 2 is a perspective view of the main body of the air treatment device. [Diagram 3] FIG. 2 is an exploded perspective view of a main body unit and a processing unit of the apparatus main body. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 2 is a plan view showing the arrangement of an exhaust port, a circuit board, and an ozone generator in the main unit of the same. [Figure 9] FIG. [Figure 10] 2 is a graph showing the change in ozone concentration when the ultraviolet light source of the air treatment device is turned on and off. 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 one of sterilization, disinfection, sterilization, sterilization, deodorization, and deodorization by a predetermined method on the air circulating inside the air treatment device. The air treatment of the air treatment device can be interpreted as any one of sterilization, disinfection, sterilization, sterilization, deodorization, and deodorization. The predetermined method here is light irradiation, photocatalysis, ozone, etc. Light irradiation refers to irradiation with light of wavelengths such as 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] FIG. 1 shows an air treatment device 10. The air treatment device 10 is installed in a semi-embedded state in a recessed hole formed in a space, for example, a room, on which the device is to be installed, and has an air treatment function for treating the air in the room. The semi-embedded state here means that the air treatment device 10 is installed in the recessed hole so that at least a part of the device is located (exposed) on the room side of the installation surface. The installation surface of the room may be any of a ceiling surface, a side wall surface, a partition surface, etc., and in this embodiment, the ceiling surface is described. In the following, the ceiling surface, the side wall surface, and the partition surface are collectively referred to as the wall surface. The air treatment device 10 is installed in a semi-embedded state in the wall surface, and at least a part of the device is located (exposed) in the room space where people stay, which is one of two spaces facing the wall surface.

[0012] The air treatment device 10 comprises a device main body 11 and a power supply unit 12 that converts AC power, for example from a commercial AC power source, into a specified 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] 2 to 5, the device main body 11 includes a main body unit 16, which is a main body part installed on the ceiling surface, and a processing unit 17, which is a detachable part detachably attached to the main body unit 16. The upper side of the device main body 11 (main body unit 16 and processing unit 17) is an embedded area 11a embedded in an embedding hole in the ceiling surface, and the lower side is a protruding area 11b, which is an exposed area or lower area exposed from the ceiling surface to the room. Note that the embedded area 11a may be exposed above the ceiling surface (i.e., above the ceiling).

[0014] The device body 11 includes an intake port 18, which is a first port 18a provided circumferentially in the protruding region 11b of the processing unit 17, an exhaust port 19, which is a second port 19a provided circumferentially in the protruding region 11b of the main unit 16 outside the intake port 18, an air processing unit 20 provided in the processing unit 17, and an outer path 21 provided between the main unit 16 and the processing unit 17. In the device body 11, an air flow path 22 is formed in the device body 11, which connects the intake port 18 and the exhaust port 19 through the air processing unit 20 and the outer path 21. The outer path 21 is a space sandwiched (surrounded) between the inner surface of the main unit 16 and the outer surface of the processing unit 17. In this embodiment, the first port 18a is an intake port 18 that draws in outside air, and the second port 19a is an exhaust port 19 that exhausts air that has passed through the air processing unit 20 to the outside, but the second port 19a may be an intake port 18 that draws in outside air, and the first port 18a may be an exhaust port 19 that exhausts air that has passed through the air processing unit 20 to the outside.

[0015] The air treatment unit 20 is cylindrical with side walls and has openings on the top and bottom surfaces. The entire top and bottom surfaces may be open, or only a portion of the top and bottom surfaces may be open. The top and bottom openings are openings that allow air to flow to the first port 18a and the second port 19a. The air treatment unit 20 may be cylindrical or polygonal prism-shaped. The air treatment unit includes a photocatalyst (photocatalyst filter 117) and an ultraviolet light source 110.

[0016] 1 to 8 show the main unit 16. The main unit 16 is equipped with an external housing 24. Inside the external housing 24, the bottom side is open and a space is formed as an attachment / detachment area 24a in which the processing unit 17 is detachably disposed. In the external housing 24, a fan 25, a mounting member 26, a circuit board 27, an ozone generator 28, and the like are disposed.

[0017] The outer housing 24 includes a housing portion 30, a cover portion 31 attached to the housing portion 30, and a decorative frame 32 attached to the protruding region 11b of the housing portion 30.

[0018] The housing 30 is made of, for example, resin, and includes 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 that becomes the protruding region 11b of the housing 30 protrudes from the periphery of the lower side of the housing 30. An opening 37 is formed in part of the side portion 34 along the vertical direction.

[0019] The cover 31 is made of, for example, sheet metal, and includes an annular upper plate 40 attached to the upper surface of the housing 30, and a side plate 41 disposed in and closing the opening 37 of the housing 30. A cable 13 that electrically connects the power supply 12 and the circuit board 27 is inserted through the side plate 41.

[0020] A metal torsion spring 42 is attached to the inner surface of the side plate portion 41 of the cover portion 31, and biases a processing unit connection wiring (not shown) having a connector at the tip end for electrically connecting the circuit board 27 and the processing unit 17 toward the inner surface of the side plate portion 41. When the processing unit connection wiring is pulled downward from the main unit 16 against the bias of the torsion spring 42 and connected to the processing unit 17, and then the processing unit 17 is inserted into the main unit 16, the processing unit connection wiring is pulled up by the torsion spring 42 and pressed against the side surface portion 41 of the cover portion 31, thereby preventing the processing unit connection wiring from becoming loose, tangled, caught, or the like.

[0021] A plurality of mounting springs 43 are attached to the outer peripheral surface of the housing 30 for mounting the main unit 16 to a ceiling surface.

[0022] The decorative frame 32 is made of, for example, resin, is formed in a circular ring shape with an opening in the center, and is attached to the lower side of the flange portion 36 of the housing portion 30. The decorative frame 32 includes a tubular portion 47 that forms a central insertion opening 46, and an annular decorative surface portion 48 provided around the periphery of the lower side of the tubular portion 47.

[0023] On the upper surface side of the decorative frame 32, there are provided an exhaust port forming region (first port forming region) 49 that forms the exhaust port 19 between the housing part 30, a region of a circuit board housing part 50 that houses a circuit board 27 between the housing part 30, and an ozone generator housing part 51 that houses an ozone generator 28 between the housing part 30. The exhaust port forming region 49 is configured so that the sum of the angle of the exhaust port forming region 49 in the circumferential direction of the external housing 24, the angle of the region of the circuit board housing part 50 in the circumferential direction of the external housing 24, and the angle of the region of the ozone generator housing part 51 in the circumferential direction of the external housing 24 is 360 degrees. The exhaust port forming region 49 may be formed in a wider angular range in the circumferential direction of the external housing 24 than the region of the circuit board housing part 50 and the region of the ozone generator housing part 51.

[0024] A plurality of fins 52 are provided upright in the exhaust port forming region 49 to control the flow of air exhausted from between the exhaust port forming region 49 and the housing part 30. The fins 52 are provided in the shape of blades curved in the circumferential direction along the flow of the swirling air flow F (see FIG. 8) created by the fan 25 in the outer path 21 of the flow path 22. The direction of the swirling air flow F created by the fan 25 coincides with the rotation direction of the fan 25.

[0025] The circuit board accommodating portion 50 is provided with a peripheral wall portion 53 that rises from the peripheral portion of the decorative surface portion 48 and closes the outer circumferential surface between the circuit board accommodating portion 50 and the housing portion 30 .

[0026] The ozone generator housing 51 is formed by a housing cover 54 that is separate from the decorative frame 32 and is attached to the decorative frame 32. The housing cover 54 has a lower surface portion 54a that constitutes the decorative surface portion 48 and a side surface portion 54b that constitutes the peripheral wall portion 53. The housing cover 54 may be formed integrally with the decorative frame 32. The ozone generator housing 51 protrudes at least in the outer diameter direction from the outer circumferential surface of the decorative frame 32 in accordance with the shape of the ozone generator 28, but is formed on the same plane as the outer circumferential surface of the decorative frame 32 when the ozone generator 28 is shaped to fit within the outer diameter of the decorative frame 32.

[0027] A window 55 is formed in the cylinder 47 at a position corresponding to the ozone generator housing 51. The window 55 is formed as a circumferentially elongated opening at the vertical middle position of the cylinder 47. The window 55 communicates the ozone generator housing 51 with the attachment / detachment area 24a inside the external housing 24, and is configured so that the ozone generator 28 housed in the ozone generator housing 51 is exposed to the attachment / detachment area 24a of the external housing 24. The window 55 is configured so that an electrode portion that generates ozone in the ozone generator 28 is exposed, and the entire ozone generator 28 does not have to be exposed. Maintenance of the electrode portion of the ozone generator 28 (for example, wiping with a cloth) is performed from the outside through the window 55.

[0028] A detachable groove 56 is provided in a portion of the circumferential direction of the cylindrical portion 47, and a mounting groove 57 is provided in communication with one circumferential side of the detachable groove 56. The lower edge of the mounting groove 57 protrudes higher than the lower edge of the detachable groove 56 and toward the center of the insertion opening 46. The detachable groove 56 is disposed at an end of the exhaust port forming area 49 adjacent to the circuit board accommodating portion 50, and the mounting groove 57 is disposed at an end of the circuit board accommodating portion 50 adjacent to the exhaust port forming area 49.

[0029] A positioning portion 58 for positioning the processing unit 17 is provided on the inner peripheral surface of the cylindrical portion 47. This positioning portion 58 includes a radial positioning portion 58a for positioning the radial position on the inner peripheral surface, and an insertion positioning portion 58b protruding in the inner radial direction from an upper side of this radial positioning portion 58a for positioning the insertion position of the processing unit 17.

[0030] On the surface of the decorative surface portion 48, there are provided an attachment / detachment mark 59a, for example a "△" mark, which indicates the attachment / detachment position when attaching / detaching the processing unit 17 to the main unit 16, and an attachment mark 59b, for example a "◯" mark, which indicates the position where the processing unit 17 is attached to the main unit 16. Furthermore, a detection hole 60 and two monitor holes 61 are provided in a portion of the decorative surface portion 48 which overlaps with the area of ​​the circuit board housing portion 50 in a top view.

[0031] The protruding region 11b of the external housing 24 is divided into an upper side on the housing unit 30 side and a lower side on the decorative frame 32 side. An operation surface portion 62 having a shape obtained by cutting out the circumferential surface in a linear manner is provided at the upper position of the protruding region 11b corresponding to the area of ​​the circuit board accommodating portion 50, that is, on the peripheral surface portion of the flange portion 36 on the housing unit 30 side (see FIG. 7). Two operation holes 63 are provided in the operation surface portion 62 and spaced apart in the circumferential direction of the flange portion 36.

[0032] The fan 25 is attached to the underside of the upper surface 35 of the housing 30 by screws, and is disposed at the upper side inside the housing 30. The fan 25 is a centrifugal fan, and includes an impeller and a motor for rotating the impeller. The fan 25 draws in air from the underside, which is the end surface side in the axial direction, by the rotation of the impeller, and discharges air from the circumferential surface side. The air discharged from the circumferential surface side of the fan 25 becomes a swirling flow F that rotates around the axis of the fan 25. The swirling flow F is a flow that moves toward the exhaust port 19 while swirling around the outer path 21 of the flow path 22, and becomes a flow that swirls in the counterclockwise direction when viewed from above the fan 25.

[0033] The mounting member 26 is made of metal such as aluminum die-casting, and is formed in a ring shape with an opening in the center. The mounting member 26 is disposed around the fan 25, and is attached to the underside of the upper surface 35 of the housing 30 by screwing. The mounting member 26 includes an inclined air guide section 65 that guides the air discharged from around the fan 25 toward the bottom of the external housing 24.

[0034] The mounting member 26 also serves as a support member for supporting the processing unit 17 that is detachably attached to the main unit 16. The mounting member 26 is provided with support parts 66 at two diametrically opposed locations. These support parts 66 protrude downward from the mounting member 26 and toward the center of the mounting member 26. One circumferential side of the support parts 66 is open, and the other side is closed. A stopper part 67 that protrudes upward is provided at the lower edge of the opening side of the support parts 66. The opening sides of the two support parts 66 are configured to be in one circumferential direction. It should be noted that three or more support parts 66 may be provided.

[0035] The circuit board 27 is disposed in the protruding region 11b of the external housing 24, in a circuit board accommodating portion 50 between the flange portion 36 of the housing portion 30 and the decorative frame 32. The circuit board 27 is attached to the decorative frame 32, but may be attached to the housing portion 30 side.

[0036] The circuit board 27 is equipped with a power supply circuit and a control circuit that receives power supplied from the power supply unit 12 via the cable 13, supplies power to and controls the fan 25 through the fan connection wiring, supplies power to and controls the processing unit 17 (ultraviolet light source and visible light source) through the processing unit connection wiring, and supplies power to and controls the ozone generator 28 through the ozone generator connection wiring.

[0037] A human presence sensor 69 that detects a human body, two monitor lamps 70 that display the status of the air treatment device 10, and two operating units 71, 72 that switch the operating mode of the air treatment device 10 are connected to the control circuit.

[0038] The human presence sensor 69 is disposed opposite the detection hole 60 in the decorative frame 32, and detects the presence or absence of a human body and the movement of a human body below the air treatment device 10. The two monitor lamps 70 are disposed opposite the two monitor holes 61 in the decorative frame 32, respectively, and indicate the operating status of the air treatment device 10 by the emitted color, on / off status, blinking, etc.

[0039] The operation units 71, 72 are, for example, slide switches, and are arranged to face the operation hole 63 of the operation surface unit 62. When arranged, the operation units 71, 72 can be slid laterally along the operation surface unit 62 via the operation hole 63. The operation units 71, 72 can be switched in a plurality of stages by a slide operation, and the operation surface unit 62 may display the name of the switched mode corresponding to the switching position of the operation units 71, 72.

[0040] An attachment detection switch 73 that detects that the processing unit 17 is attached to the main unit 16 at a predetermined attachment position is electrically connected to the circuit board 27. The attachment detection switch 73 is disposed at the position of the attachment groove portion 57 of the decorative frame 32. The control circuit of the circuit board 27 enables the supply of power to the fan 25, the ultraviolet light source 110, and the ozone generator 28 when the attachment detection switch 73 detects the attachment of the processing unit 17, and controls so as not to supply power to the fan 25, the ultraviolet light source 110, and the ozone generator 28 when the attachment detection switch 73 does not detect the attachment of the processing unit 17 or when it changes from the detected state to undetected.

[0041] The ozone generator 28 generates ozone by, for example, a silent discharge method, an electrolysis method, an ultraviolet lamp method, etc. In the silent discharge method, a dielectric is provided between parallel electrodes, and a high AC voltage is applied between the two electrodes to generate silent discharge, and ozone is produced from oxygen by electrons generated by this silent discharge.

[0042] The ozone generator 28 of this embodiment employs, for example, a silent discharge system. The ozone generator 28 has an ozone generating section 75 that generates ozone. The ozone generating section 75 includes a pair of electrode support sections 77 protruding from a generator body 76, and a pair of electrodes 78 (see FIG. 3) and a dielectric body disposed between the electrode support sections 77.

[0043] The ozone generator 28 is attached to the flange portion 36 of the housing portion 30, and is housed in an ozone generator housing portion 51 of a decorative frame 32 that is attached to the housing portion 30. The ozone generator 28 may also be attached to the ozone generator housing portion 51 of the decorative frame 32.

[0044] The ozone generator 28 housed in the ozone generator housing 51 has an ozone generating section 75 that communicates with the outer path 21 of the flow path 22 through a gap between the side surface section 34 of the housing section 30 and the tube section 47 of the decorative frame 32, and the generated ozone is supplied to the air flowing through the flow path 22. Ozone decomposes odorous components in the air to deodorize and eliminate odors and suppress viral activity, and is released into the room from the exhaust port 19 together with the air flowing through the flow path 22 to decompose and deodorize odorous components attached to the ceiling, walls, and floor of the room, as well as to objects placed in the room.

[0045] The ozone generator 28 is disposed at a position where the electrode 78 of the ozone generating section 75 faces the window section 55 of the decorative frame 32, and is exposed in the attachment / detachment area 24a of the external housing 24 when the processing unit 17 is removed.

[0046] In the main unit 16, the circuit board 27, the ozone generator 28, and the exhaust port 19 are arranged in this order from the upstream side of the air flow in the flow path 22 created by the fan 25. That is, the circuit board 27, the ozone generator 28, and the exhaust port 19 are arranged in this order from the upstream side of the flow of the swirling air flow F (see FIG. 8) created by the fan 25 in the outer path 21 of the flow path 22. Therefore, the ozone generator 28 is provided on the exhaust port 19 side of the air processing unit 20 in the flow path 22, and supplies ozone to the air passing through the flow path 22.

[0047] 2 to 5 and 9 show the processing unit 17. The processing unit 17 includes an internal housing 80 in which an intake port cover 81, which is a first port cover, a dust filter 82, an ultraviolet light source unit 83, a photocatalytic filter unit 84, and the like are disposed.

[0048] The internal housing 80 includes a processing housing portion 86, with an upper frame member 87 attached to the upper side of this processing housing portion 86 and a lower frame member 88 attached to the lower side of the processing housing portion 86.

[0049] The processing housing 86 is made of metal such as aluminum die-cast, and is formed by dividing it into two parts in the radial direction, which are assembled into a cylindrical shape and screwed together to form an integrated structure.

[0050] The processing housing part 86 is cylindrical with a through-hole that connects the upper and lower circular surfaces, and the inside of the processing housing part 86, which is the through-hole, is configured as the air processing part 20. The lower surface side of the through-hole is formed with an intake side opening 89, which is a first opening side opening that communicates with the intake port 18 side, and the upper surface side of the through-hole is formed with an exhaust side opening 90, which is a second opening side opening that communicates with the exhaust port 19 side. The intake side opening 89 and the exhaust side opening 90 are connected via the air processing part 20. In a plane perpendicular to the line segment from the intake side opening 89 to the exhaust side opening 90, the cross-sectional area (opening area) of the exhaust side opening 90 is smaller than the cross-sectional area (opening area) of the intake side opening 89.

[0051] The inner surface of the processing housing part 86 facing the air processing part 20 is formed into a surface with high light reflectance, such as a mirror surface. A cylindrical reflector whose inner surface is formed into a surface with high light reflectance, such as a mirror surface, may be disposed inside the inner circumferential surface of the processing housing part 86.

[0052] A cylindrical portion 91 protrudes from the upper side of the processing housing portion 86, and two engagement portions 92, which are mounting members, protrude in the outer diameter direction from the upper side of the cylindrical portion 91 at two diametrically opposed positions. The two engagement portions 92 are arranged at a height that allows them to overcome the stopper portions 67 of the support portions 66 of the mounting member 26 when the processing unit 17 is inserted to the innermost position in the main unit 16. Then, when the processing unit 17 is rotated in a predetermined mounting rotation direction (for example, counterclockwise in a top view) in the main unit 16, the two engagement portions 92 overcome the stopper portions 67 and engage with the two support portions 66 of the mounting member 26. In this state, when the support of the processing unit 17 is released (for example, when the processing unit 17 is attached by hand, the hand is released), the engagement portions 92 of the processing unit 17 are positioned below the height of the stopper portions 67 of the support portions 66 due to gravity. Therefore, unless a person lifts up and rotates the processing unit 17, the processing unit 17 will not come off the support portion 66 of the mounting member 26. In other words, it is possible to prevent the processing unit 17 from coming off unintentionally from the main unit 16. In addition, a retaining spring 93 is disposed below the engaging portion 92, which comes into contact with the lower surface side of the supporting portion 66 of the mounting member 26 and holds the supporting portion 66 by pinching it between the engaging portion 92 and the retaining spring 93.

[0053] The upper side of the cylindrical portion 91 is provided with holder mounting portions 94 for detachably mounting the holder portion of the photocatalytic filter portion 84 at two diametrically opposed locations at positions different from the two engagement portions 92.

[0054] The upper frame member 87 is made of, for example, resin, and is formed in a circular ring shape with an opening in the center. The upper frame member 87 is disposed around the tubular portion 91 and attached to the upper surface side of the processing housing portion 86. A part of the outer periphery of the upper frame member 87 is cut out, and a connector 95 (for example, a female connector) is attached to that part. One end side of the ultraviolet light source connection wiring that electrically connects to the ultraviolet light source portion 83 side is electrically connected to this connector 95. The other end side of this ultraviolet light source connection wiring is electrically connected to the ultraviolet light source portion 83 side within the processing housing portion 86. At least the part of the ultraviolet light source connection wiring that is exposed to the air processing portion 20 within the processing housing portion 86 is covered with an insulating material having excellent ultraviolet resistance.

[0055] The lower frame member 88 is made of, for example, resin, and is formed in a circular ring shape with an opening in the center. The lower frame member 88 is formed with a guide surface portion 96 having a conical surface shape that widens and inclines downward, and the intake port 18 is formed between the guide surface portion 96 and the intake port cover 81. The guide surface portion 96 leads (guides) the air in the direction of the air processing portion 20.

[0056] The guide surface portion 96 is provided with a plurality of mounting holes 97 for removably mounting the intake port cover 81.

[0057] The guide surface portion 96 is provided with an attachment / detachment mark 98 in the form of a "△" which indicates the attachment / detachment 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 attachment / detachment mark 98 is rotated to a position where it matches the attachment / detachment mark 59a on the main unit 16 side, and when the processing unit 17 is rotated to a position where the attachment / detachment mark 98 matches the mounting mark 59b on the main unit 16 side, the two engagement portions 92 are engaged with and attached to the two support portions 66 on the main unit 16 side.

[0058] An annular positioning portion 99 protrudes from the upper surface side of the lower frame member 88, and is positioned by engaging with the positioning portion 58 of the lower frame member 88 on the external housing 24 side.

[0059] An attachment / detachment guide portion 100 is provided to protrude from the outer peripheral surface of the positioning portion 99. The attachment / detachment guide portion 100 can be inserted and detached by moving vertically relative to the attachment / detachment groove portion 56 of the decorative frame 32 at a rotation position where the attachment / detachment mark 98 coincides with the attachment / detachment mark 59a on the main unit 16 side, and is rotated to the attachment groove portion 57 by rotating the processing unit 17 so that the attachment / detachment mark 98 coincides with the mounting mark 59b on the main unit 16 side. The attachment / detachment guide portion 100 is provided with a switch operating portion 100a that switches the attachment detection switch 73 when rotated to the mounting groove portion 57, and a stopper portion 100b that abuts against the side wall on the lower side of the mounting groove portion 57 to restrict the rotation of the processing unit 17 in the attachment rotation direction.

[0060] The lower frame member 88 covers the window portion 55 when the processing unit 17 is attached to the attachment / detachment area 24a of the main unit 16, and ensures the insulation of the electrode 78 of the ozone generator .

[0061] Moreover, the air intake cover 81 is made of, for example, resin, formed in a disk shape, and has a plurality of mounting claws 101 protruding from its periphery for detachably mounting in mounting holes 97 of the lower member 88. When the air intake cover 81 is mounted to the lower frame member 88, a circumferential gap communicating with the air processing unit 20 is formed between the air intake cover 81 and the guide surface portion 96 of the lower frame member 88, and this gap constitutes the air intake 18. The air intake cover 81 has an upper surface side curved in a concave shape, and also functions as a dust receiving portion for receiving dust and the like that falls from the dust filter 82 when the fan 25 is stopped.

[0062] In addition, the dust filter 82 is made of, for example, a stainless steel wire mesh, and is attached with its peripheral portion sandwiched between the processing housing part 86 and the lower frame member 88, and is positioned so as to cover the entire area of ​​the intake side opening 89 of the processing housing part 86.

[0063] The ultraviolet light source unit 83 also includes an ultraviolet light source 110, a heat dissipation block 111 in which the ultraviolet light source 110 is disposed, 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 83 is disposed on the lower side of the air processing unit 20 of the internal housing 80 by being sandwiched and attached between the processing housing unit 86 that is divided into two parts.

[0064] The ultraviolet light source 110 is disposed above the intake side opening 89 of the internal housing 80, at a position where it is hit by the air entering through the intake side opening 89. The ultraviolet light source 110 irradiates ultraviolet light (light in the ultraviolet region) toward the upper part inside the air processing unit 20. The ultraviolet light source 110 is configured as a light emitting module including a rectangular substrate 113 and a light emitting element 114 mounted on the substrate 113 for emitting ultraviolet light.

[0065] The light emitting element 114 uses at least a first LED (photocatalytic LED) that emits light of at least 360 nm to 420 nm UV-A or visible wavelength components for exciting the photocatalyst supported on the photocatalytic filter described below. In addition to the first LED, the light emitting element 114 may use a second LED (sterilizing LED) that emits ultraviolet light of a UV-C wavelength component with a peak wavelength of 300 nm or less for sterilizing air, preferably ultraviolet light of a wavelength component of 200 to 280 nm. The wavelength of the light emitted by the second LED (sterilizing LED) is shorter than the wavelength of the light emitted by the first LED (photocatalytic LED).

[0066] The heat dissipation block 111 is made of, for example, metal, and is formed into a long rectangular parallelepiped shape, with a substrate 113 of the ultraviolet light source 110 attached to the upper surface side. The heat dissipation block 111 may have an uneven surface (including minute unevenness that cannot be seen with the naked eye) formed on the surface so that the surface area can be increased and heat dissipation performance can be improved.

[0067] The ultraviolet light source holder 112 is made of, for example, metal or resin, and is formed in a circular ring shape with an opening in the center. The ultraviolet light source holder 112 is attached with a heat dissipation block 111 in which the ultraviolet light source 110 is arranged so as to cross the central opening in the diameter direction. The ultraviolet light source holder 112 has, for example, three light shielding walls 112a standing upright in a concentric manner above the central opening with a gap. Both ends of the light shielding walls 112a in the circumferential direction are supported by the ultraviolet light source holder 112, and the space between the adjacent light shielding walls 112a and the central opening are open in the vertical direction. The ultraviolet light source holder 112 is sandwiched and attached between the two divided processing housing parts 86, so that it is disposed on the lower side of the air processing part 20 of the internal housing 80, and the central opening part of the ultraviolet light source holder 112 is connected to the intake side opening 89 of the internal housing 80.

[0068] The ultraviolet light source 110 may be disposed above and downstream of the photocatalytic filter 117 in the flow path 22, and the photocatalytic filter 117 may be irradiated with light from that position.

[0069] The photocatalytic filter unit 84 also includes a photocatalytic filter 117 and a holder 118 that holds the photocatalytic filter 117 and is detachably attached to the internal housing 80. The photocatalytic filter unit 84 is disposed inside the cylindrical portion 91 of the internal housing 80 from above so as to be detachable.

[0070] The photocatalytic filter 117 is in the form of a circular block, and is formed with a plurality of ventilation holes 119 penetrating in the thickness direction. The photocatalytic filter 117 is supported by a support on which a photocatalyst such as titanium oxide is held and coated, and when exposed to ultraviolet light or visible light of, for example, a UV-A wavelength component of 360 nm to 420 nm from the ultraviolet light source 110, it generates active enzymes and OH radicals, and the generated active enzymes and OH radicals break down odor components in the air to deodorize and eliminate odors, or suppress viral activity.

[0071] Holder 118 is formed of, for example, a resin material. Holder 118 includes an annular or cylindrical base portion 120 and attachment portions 121 protruding upward from two diametrically opposed positions on base portion 120.

[0072] The photocatalytic filter 117 is detachably disposed on the upper surface side of the base portion 120. The two mounting portions 121 are engaged with two holder mounting portions 94 provided on the cylindrical portion 91 of the inner housing 80 and detachably attached.

[0073] When the photocatalytic filter unit 84 is attached to the inner housing 80 , the photocatalytic filter 117 is disposed so as to close the exhaust side opening 90 of the inner housing 80 .

[0074] In addition, in the flow path 22 of the device body 11, a dust filter 82, an air processing unit 20, a fan 25, a mounting member 26, an engagement unit 92 of the processing housing unit 86, a circuit board 27, and an ozone generator 28 are arranged in this order between the intake port 18 and the exhaust port 19. The ozone generator 28 is arranged downstream of the circuit board 27 due to the flow of the swirling air flow F (see FIG. 8) created by the fan 25 in the outer path 21 of the flow path 22.

[0075] A metal member 130 that may be affected by the oxidizing action of ozone or a part having this metal member 130 is disposed in this flow path 22 between the intake port 18 or air treatment unit 20 and the ozone generator 28. The fan 25 has the metal member 130 in the motor, the mounting member 26 and the engagement unit 92 are composed of the metal member 130, and the circuit board 27 has the metal member 130 in the wiring pattern and the mounted electronic components. The dust filter 82 is made of stainless steel, and does not fall under the category of the metal member 130 that may be affected by the oxidizing action of ozone.

[0076] Next, installation of air treatment system 10 will be described.

[0077] The power line wired on the ceiling surface (behind the ceiling) is pulled out from the recessed hole and electrically connected to the power supply unit 12, which is then inserted into the recessed hole and placed on the ceiling surface (behind the ceiling). The multiple mounting springs 43 are inserted into the recessed hole in a state where they are elastically deformed to fit along the side of the device main body 11, and by releasing the operation of the mounting springs 43, the multiple mounting springs 43 unfold on the ceiling surface by their spring force, pulling the device main body 11 towards the ceiling surface, and the flange portion 36 of the protruding region 11b is placed in a state of contact with the ceiling surface.

[0078] The device body 11 has an embedded region 11a embedded in the ceiling surface and a protruding region 11b exposed from the ceiling surface and disposed in a room, which is the space below the ceiling surface. An intake port 18 and an exhaust port 19 are disposed in the protruding region 11b.

[0079] The operation of air treatment device 10 will now be described.

[0080] A circuit board 27 receiving power from the power supply unit 12 supplies power to and controls the fan 25, the ozone generator 28, and the ultraviolet light source 110.

[0081] When the fan 25 receives power and rotates, the air in the room is circulated through the flow path 22 that connects the intake port 18 and the exhaust port 19. That is, the air in the room is sucked into the air processing unit 20 through the intake port 18 in the protruding region 11b of the processing unit 17, the dust filter 82, and the intake side opening 89, and when the air sucked into the air processing unit 20 passes through the photocatalytic filter 117, the air is processed by the action of the photocatalyst.

[0082] The air that has passed through the photocatalytic filter 117 is sucked into the underside of the fan 25 through the exhaust side opening 90. The air discharged from the peripheral side of the fan 25 is guided by the air guide section 65 of the mounting member 26 toward the outer passage 21 between the inner peripheral surface of the lower outer housing 24 and the outer peripheral surface of the inner housing 80, and is exhausted from the exhaust port 19 through this outer passage 21 into the room.

[0083] The air discharged from the peripheral surface side of the fan 25 becomes a swirling flow F that rotates around the axis of the fan 25, and flows toward the exhaust port 19 while swirling through the outer path 21 of the flow path 22, and is exhausted from the exhaust port 19 into the room.

[0084] Since the exhaust port 19 is provided on the peripheral surface side of the external housing 24, the air exhausted from the exhaust port 19 can easily flow over a wide area in the room, thereby improving the air treatment effect in the room.

[0085] When the ultraviolet light source 110 receives power and turns on, ultraviolet light from the ultraviolet light source 110 is irradiated onto the photocatalytic filter 117 arranged opposite to the ultraviolet light source 110. The photocatalytic filter 117 is irradiated with ultraviolet light or visible light of at least 360 nm to 420 nm wavelength components of UV-A emitted from the ultraviolet light source 110 to generate active enzymes and OH radicals, and the generated active enzymes and OH radicals decompose odor components in the air to deodorize, eliminate odors, and suppress virus activity. In addition, when UV-C ultraviolet light of 300 nm or less is irradiated into the inside of the air treatment unit 20, the air passing through the inside of the air treatment unit 20 is sterilized.

[0086] When the ozone generator 28 receives power and operates, ozone is generated in the ozone generating unit 75, and this ozone is supplied to the air flowing through the outer path 21 of the flow path 22 and is released together with the air into the room from the exhaust port 19. Ozone decomposes odorous components in the air to deodorize and eliminate odors and suppress viral activity, and by being released into the room from the exhaust port 19 together with the air flowing through the flow path 22, it also decomposes and deodorizes odorous components attached to the ceiling, walls, and floor of the room, as well as objects placed in the room.

[0087] In addition, since the intake port 18 and the exhaust port 19 are concentrically arranged and relatively close to each other, some of the ozone discharged into the room from the exhaust port 19 may be sucked into the flow path 22 from the intake port 18. If ozone is sucked into the flow path 22, the metal member 130 arranged in the flow path 22 or parts having this metal member 130, such as the fan 25, the mounting member 26, the engagement portion 92 of the processing housing part 86, and the circuit board 27, may be affected by the oxidizing action of the ozone.

[0088] In the air treatment section 20 in the flow path 22, light from the ultraviolet light source 110 is irradiated onto the ozone in the air, and the ozone in the air comes into contact with the photocatalytic filter 117, causing a photocatalytic reaction. Therefore, at least a part of the ozone passing through the air treatment section 20 disappears, and the amount of ozone in the air that has passed through the air treatment section 20 is reduced.

[0089] By arranging metal members 130, which may be affected by the oxidizing action of ozone, or parts having this metal member 130, such as the fan 25, the mounting member 26, and the engagement portion 92 of the processing housing portion 86, the circuit board 27, etc., between the ozone generator 28 downstream of the air processing portion 20 of the flow path 22, the effect of ozone on these metal members 130 can be reduced.

[0090] 10 shows a graph of the results of measuring the ozone concentration when the ultraviolet light source 110 is turned on and off. The horizontal axis indicates the elapsed time from an arbitrary reference point, and the vertical axis indicates the ozone concentration measured by an ozone meter in a room.

[0091] The measurements were performed in two ways: measurement A, in which only the ozone generator 28 was operated and the ultraviolet light source 110 was turned off, and measurement B, in which the ozone generator 28 was operated and the ultraviolet light source 110 was turned on to allow the photocatalytic action of the photocatalytic filter 117 to take place.

[0092] In measurement A, the ozone concentration was high, but the ozone concentration fluctuated greatly, resulting in an unstable result.

[0093] On the other hand, in measurement B, the ozone concentration value was lower than in measurement A, but the fluctuations in the ozone concentration were small, resulting in stable results.

[0094] From these results, it can be inferred that when the ultraviolet light source 110 is turned on to activate the photocatalytic action of the photocatalytic filter 117, as in measurement B, at least a portion of the ozone sucked into the flow path 22 from the intake port 18 disappears.

[0095] As described above, by arranging metal members 130, which may be affected by the oxidizing action of ozone, or parts having this metal member 130, such as the fan 25, mounting member 26, and engagement portion 92 of the processing housing portion 86, circuit board 27, etc., between the ozone generator 28 and downstream of the air processing portion 20 in the flow path 22, the effect of ozone on these metal members 130 can be reduced.

[0096] Furthermore, when the ultraviolet light source 110 is turned on to activate the photocatalytic action of the photocatalytic filter 117 as in measurement B, the ozone concentration fluctuates little and is stable, making it easy to manage the ozone concentration in the room.

[0097] Furthermore, the air treatment device 10 controls its operation with a control circuit on the circuit board 27 based on the detection of the human presence sensor 69. When the human presence sensor 69 detects a human body entering the detection area, it rotates the fan 25, operates the ozone generator 28, and turns on the ultraviolet light source 110. Switching between rotating and stopping the fan 25, operating and stopping the ozone generator 28, and turning on and off the ultraviolet light source 110 can be switched by operating the operation units 71 and 72 to select an operation mode.

[0098] The operating modes include a mode for switching the airflow of the fan 25 between "strong" and "weak," and a multi-stage mode for switching the time from when the human body is detected by the human sensor 69 until the fan 25 is stopped, the operation of the ozone generator 28 is stopped, and the ultraviolet light source 110 is turned off. One of these modes is set in each of the operating units 71, 72.

[0099] The status of the air treatment device 10 can be confirmed by checking the display of the monitor lamp 70 provided on the protruding region 11b of the device body 11. The monitor lamp 70 indicates, for example, an abnormality, air treatment in progress (sterilization in progress), the time to clean or replace the photocatalytic filter 117, the lifespan based on the operating time of the ultraviolet light source 110, the lifespan based on the operating time of the ozone generator 28, etc., by emitting light in different colors, turning on, turning off, blinking, etc.

[0100] In addition, the photocatalytic filter 117 becomes dirty over time and the processing capacity is affected, so it is preferable to clean it periodically. In this case, the processing unit 17 is removed from the main unit 16 to perform the cleaning work.

[0101] To remove the processing unit 17 from the main unit 16, while pushing up the processing unit 17, rotate the processing unit 17 in the removal direction (counterclockwise when viewed from below) so that the attachment / detachment mark 98 of the processing unit 17 moves from the position of the attachment mark 59b of the main unit 16 to the position of the attachment / detachment mark 59a.

[0102] By pushing up the processing unit 17, the engagement portion 92 of the processing unit 17 moves to a height where it does not interfere with the anti-detachment portion 67 of the support portion 66 of the main unit 16, or to a height where the engagement portion 92 can overcome the anti-detachment portion 67. In this state, by rotating the processing unit 17 in the removal direction, the engagement portion 92 comes off from above the support portion 66 through one opening side, and the attachment / detachment guide portion 100 moves from the mounting groove portion 57 to the attachment / detachment groove portion 56.

[0103] When the attachment / detachment guide 100 moves from the attachment groove 57 to the attachment groove 56, the attachment detection switch 73 turns off and does not detect the attachment of the treatment unit 17. Therefore, even if power is being supplied to the air treatment device 10, the control circuit of the circuit board 27 controls the power supply to the fan 25, the ozone generator 28, and the ultraviolet light source 110 to be stopped.

[0104] The processing unit 17 is supported and moved downward, and removed below the main unit 16. The processing unit 17 is connected to the main unit 16 by a processing unit connection wiring, but when the processing unit 17 is moved downward, the processing unit connection wiring is pulled, causing the torsion spring 42 to swing downward against the bias, allowing the processing unit 17 to be removed below the main unit 16. The connector of the processing unit connection wiring is removed from the connector 95 of the processing unit 17 that has been removed below the main unit 16. The removed processing unit connection wiring is pulled upward by the bias of the torsion spring 42, and is pressed against the inner surface of the external housing 24.

[0105] The two mounting parts 121 of the holder 118 holding the photocatalytic filter 117 are pinched with fingers and elastically deformed so as to approach each other, whereby the two mounting parts 121 are detached from the two holder mounting parts 94 of the internal housing 80, and in this state, the holder 118 is pulled upward and removed from the internal housing 80. The photocatalytic filter 117 is removed from the removed holder 118 and washed.

[0106] The photocatalytic filter 117 which has been completely cleaned, or a new photocatalytic filter 117 to be replaced, is attached to the holder 118 .

[0107] The two mounting portions 121 of the holder 118 are engaged with the two holder mounting portions 94 of the inner housing 80, and are inserted from above into the inside of the cylindrical portion 91 of the inner housing 80 and attached.

[0108] On the other hand, to attach the removed processing unit 17 to the main unit 16, the processing unit connection wiring is pulled out downward from within the main unit 16, and the connector is connected to the connector 95 of the processing unit 17 below the main unit 16. The torsion spring 42 swings downward against the bias together with the pulled out processing unit connection wiring.

[0109] The processing unit 17 is inserted into the main unit 16 by aligning the attachment / detachment mark 98 of the processing unit 17 with the attachment / detachment mark 59a of 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 100 of the processing unit 17 can be inserted into the attachment / detachment groove portion 56 of the main unit 16 to insert the processing unit 17 to the innermost position in 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 100 of the processing unit 17 does not match the position of the attachment / detachment groove portion 56 of the main unit 16, and the processing unit 17 cannot be inserted to the innermost position in the main unit 16, and the lower side of the processing unit 17 protrudes downward from the main unit 16. In this state, the processing unit 17 may be rotated to align and insert the attachment / detachment guide portion 100 of the processing unit 17 into the attachment / detachment groove portion 56 of the main unit 16.

[0110] When the processing unit 17 is inserted into the main unit 16, the processing unit connection wiring becomes loose, but the force of the torsion spring 42 pulls the processing unit connection wiring upward and presses it against the inner surface of the external housing 24, preventing the processing unit connection wiring from becoming tangled or caught.

[0111] When processing unit 17 is inserted to the innermost position within main unit 16, positioning portion 99 of processing unit 17 abuts against insertion positioning portion 58b of positioning portion 58 of main unit 16 to position the processing unit. In this state, engagement portion 92 of processing unit 17 is positioned above removal prevention portion 67 of support portion 66 of main unit 16.

[0112] The processing unit 17 is rotated in the mounting direction (clockwise when viewed from below) so that the attachment / detachment mark 98 of the processing unit 17 moves from the position of the attachment / detachment mark 59a of the main unit 16 to the position of the attachment mark 59b. As a result, the engagement portion 92 of the processing unit 17 moves onto the support portion 66 of the main unit 16, and the attachment / detachment guide portion 100 moves from the attachment / detachment groove portion 56 to the attachment groove portion 57. The rotation of the processing unit 17 in the mounting direction is restricted at a predetermined mounting position by the engagement portion 92 abutting on the side wall opposite to the opening side of the support portion 66 and the stopper portion 100b of the attachment / detachment guide portion 100 abutting on the side wall on the lower side of the attachment groove portion 57.

[0113] By releasing the pushing up of the processing unit 17, the engaging portion 92 of the processing unit 17 rests on and is supported by the support portion 66 of the main unit 16, and the processing unit 17 is prevented from coming off from the support portion 66 by the stopper portion 67.

[0114] When the processing unit 17 is attached to a predetermined attachment position, the attachment / detachment guide 100 moves to the position of the attachment groove 57 and turns on the attachment detection switch 73, detecting the attachment state of the processing unit 17. Therefore, the control circuit of the circuit board 27 enables the supply of power to the fan 25, the ozone generator 28, and the ultraviolet light source 110.

[0115] To remove dust captured by dust filter 82 of processing unit 17, air intake cover 81 is removed from internal housing 80 to expose dust filter 82, and the dust is removed by sucking it up with a vacuum cleaner or the like. After removing the dust, air intake cover 81 is attached to internal housing 80. Note that cleaning of dust filter 82 can be performed by removing air intake cover 81 whether processing unit 17 is attached to main unit 16 or detached from main unit 16.

[0116] In addition, the electrodes 78 of the ozone generator 28 become dirty over time and affect their performance, so it is preferable to clean them periodically. In this case, the processing unit 17 is removed from the main unit 16 for work. Therefore, when cleaning the photocatalyst filter 117, the electrodes 78 of the ozone generator 28 can also be cleaned.

[0117] As described above, when the processing unit 17 is removed from the attachment / detachment area 24a of the main unit 16, the window 55 opening in the attachment / detachment area 24a of the main unit 16 is exposed as shown in Fig. 3, and the electrode 78 of the ozone generator 28 is exposed through the window 55. Therefore, the electrode 78 of the ozone generator 28 is cleaned through the window 55 with a cleaning tool such as nonwoven fabric, a cotton swab, or a brush. At this time, as described above, when the processing unit 17 is removed from the attachment / detachment area 24a of the main unit 16, the attachment detection switch 73 is turned off and the operation of the ozone generator 28 is stopped.

[0118] After cleaning, when the processing unit 17 is attached to the attachment / detachment area 24a of the main unit 16, the window portion 55 is covered with the lower frame member 88 of the processing unit 17, and the insulation of the electrode 78 of the ozone generator 28 is ensured.

[0119] As described above, the air treatment device 10 of this embodiment is equipped with an ozone generator 28 that supplies ozone to the air passing through the flow path, in addition to the air treatment device 20 having a photocatalytic filter 117 and an ultraviolet light source 110 arranged in the flow path 22. Therefore, the photocatalytic action and ozone can improve the ability to decompose and deodorize odorous components in the air, and the ozone is released into the room together with the air flowing through the flow path 22, so that odorous components attached to the ceiling, walls, floor, and even objects placed in the room can also be decomposed and deodorized.

[0120] In addition, since the ozone generator 28 has a longer life than the ultraviolet light source 110, by disposing it in the main unit 16, it is possible to prevent breakdowns and the like that may occur when the ozone generator 28 is attached or detached.

[0121] Since the ozone generator 28 is disposed on the exhaust side where air is exhausted from the flow path 22, ozone can be released into the room with less attenuation.

[0122] By removing the processing unit 17 from the attachment / detachment area 24a of the main unit 16, the ozone generator 28 can be cleaned through the window 55 that opens into the attachment / detachment area 24a. After cleaning, the processing unit 17 is attached to the attachment / detachment area 24a of the main unit 16, so that the window 55 is covered with the processing unit 17, thereby ensuring the insulation of the ozone generator 28.

[0123] Furthermore, since the air intake 18 and the exhaust 19 are arranged concentrically and relatively close to each other, there is a possibility that some of the ozone released into the room from the exhaust 19 will be sucked into the flow path 22 from the air intake 18. However, by arranging metal members 130 that may be affected by the oxidizing action of ozone or parts that have this metal member 130, such as the fan 25, the mounting member 26, and the engagement part 92 of the processing housing part 86, the circuit board 27, etc., between the ozone generator 28 and downstream of the air treatment part 20 of the flow path 22, the effect of ozone on these metal members 130 can be reduced.

[0124] Circuit board 27 and ozone generator 28 are arranged in this order from the upstream side of the air flow in flow path 22 created by fan 25. In other words, circuit board 27, ozone generator 28, and exhaust port 19 are arranged in this order from the upstream side of the flow of swirling air flow F (see FIG. 8) created by fan 25 in outer path 21 of flow path 22. This reduces the effect of ozone on the wiring pattern of circuit board 27 and metal members 130 such as electronic components mounted thereon.

[0125] When the ultraviolet light source 110 has metal members 130 on the wiring pattern of the substrate 113 or on the terminals of the light emitting element 114, it is preferable to place the ultraviolet light source 110 downstream of the photocatalytic filter 117 in the flow path 22.

[0126] In addition, instead of the air intake cover 81, the air treatment device 10 may be provided with other functional components, such as a visible light source unit that irradiates visible light into the room, a display unit that displays images, etc., a speaker unit that emits sound, a projector unit that projects images, and a fragrance unit that emits odors.

[0127] 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]

[0128] 10 Air Treatment Equipment 18 Air Intake 19 Exhaust port 20 Air Processing Unit 22 Flow Path 25 Fans 26 Mounting material 27 Circuit Board 28 Ozone Generator 110 UV light source 130 Metallic parts

Claims

1. an air treatment unit having a photocatalyst and an ultraviolet light source; an air intake for directing air to the air treatment section; an exhaust port arranged concentrically with the intake port and configured to exhaust the air treated by the air treatment device; an air flow path through the air inlet, the air treatment section, and the air outlet; an ozone generator that is provided in the flow path on the exhaust port side of the air treatment unit and supplies ozone to the air passing through the flow path; Equipped with A metal member is disposed in the flow path between the intake port and the ozone generator. An air treatment device comprising:

2. a fan having the metal member that is disposed in the flow path between the air intake and the ozone generator and that creates an air flow in the flow path; 2. The air treatment system of claim 1.

3. A main body portion provided with the exhaust port; a detachable part provided with the air intake and the air processing part and detachably attached to the main body part; a mounting member that is the metal member and that is disposed between the air treatment unit and the ozone generator in the flow path and that detachably mounts the detachable unit to the main body unit; 2. The air treatment device of claim 1, comprising:

4. a circuit board having the metal member, The circuit board and the ozone generator are disposed in this order from the upstream side of the air flow in the flow path created by the fan.

3. The air treatment system of claim 2.

5. The fan is a centrifugal fan that draws in air from an end face side in an axial direction and discharges it from a peripheral face side as a swirling flow around an axis, The circuit board and the ozone generator are disposed in this order from the upstream side of the swirling air flow as viewed from the axial direction of the fan.

5. An air treatment system according to claim 4.

Images