Photocatalyst module and electrical products incorporating the photocatalyst module

Abstract

To easily add a function of oxidative decomposition of harmful substances by photocatalysis to an existing appliance without altering it.SOLUTION: A second frame body is combined with a first frame body so that the inside of the second frame body is opposite to the inside of the first frame body. The first frame body has a first frame body opening through which the outside and the inside of the first frame body communicate and an air passage hole of a photocatalyst filter is located in the first frame body opening. The photocatalyst filter is arranged inside the first frame body so that the surface side of the photocatalyst filter is opposite to the inside of the first frame body. The second frame body has a second frame body opening through which the outside and the inside of the second frame body communicate and a light source clamp plate opening is located in the second frame body opening. The light source clamp plate is arranged inside the second frame body so that the surface side of the light source clamp plate is opposite to the inside of the second frame body. A photocatalyst module is thus structured.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a photocatalyst module including a photocatalyst filter and a light source that excites the photocatalyst, and to an electrical product incorporating this photocatalyst module. [Background technology]

[0002] 2. Description of the Related Art Photocatalytic filters that utilize photocatalysts to capture, decompose and remove harmful substances such as viruses have been developed and commercialized.

[0003] Most photocatalytic filters currently on the market are made with an alumina ceramic porous substrate, on whose surface an ultraviolet-responsive photocatalytic layer made of titanium oxide (titanium dioxide: TiO2) is formed. Note that anatase type titanium oxide, which has high photocatalytic performance, is mainly used. For titanium oxide, small particles, particularly nanoparticles with a particle size on the order of a few nanometers, are used to increase the specific surface area of ​​the photocatalytic active layer and improve its decomposition and removal capabilities.

[0004] Photocatalytic filters are used for various purposes, such as air purification and water (polluted wastewater) purification. For air purification, they can be installed in various locations, such as those housed inside air purifiers, or those attached to the air intake path to the room or the air exhaust path to the outside.

[0005] When the photocatalytic filter is housed in, for example, an air cleaner, an ultraviolet lamp is housed in the housing of the air cleaner in addition to the photocatalytic filter. The ultraviolet lamp is used to irradiate the photocatalyst with ultraviolet light to excite the photocatalyst and oxidize and decompose harmful substances in the air. In addition, an intake fan is housed in the housing to take in outside air, pass the air through the photocatalytic filter, and exhaust it to the outside.

[0006] This allows outside air to be taken into the air purifier and pass through the photocatalyst filter, during which harmful substances are captured, decomposed and removed by the photocatalyst filter, and the clean air is then discharged to the outside.

[0007] The reason why ceramic is used as the base material of the photocatalyst is that it has depressions on its surface, which makes it water-absorbent, and has the advantage of being able to absorb and hold titanium oxide slurry on its surface during the production of the photocatalyst filter, and it is also resistant to oxidation even when exposed to ultraviolet light, etc. Also, alumina ceramic is used because it has good light reflectivity, allowing ultraviolet light to be efficiently irradiated onto the photocatalyst, enhancing the oxidative decomposition ability.

[0008] The base material of the photocatalyst is made porous in order to allow the air from which harmful substances are to be removed to pass through, and also to increase light transmittance and enable efficient irradiation of ultraviolet light to the photocatalyst, thereby enhancing its oxidative decomposition ability.

[0009] The applicant has filed the following patent document 1. Patent document 1 describes an invention in which an ultraviolet lamp is inserted into the hollow part of a photocatalytic filter and arranged with a predetermined gap from the inner circumferential surface of the thick part. According to the invention shown in Patent document 1, the photocatalytic filter is smaller in size than the photocatalytic filters used in conventional air purifiers, but exhibits air purification capabilities equal to or greater than conventional filters. This makes it possible to reduce the size of the air purifier.

[0010] The applicant has also filed a patent application for the following Patent Document 2, which has been granted a patent. Patent Document 2 describes an invention relating to a photocatalytic filter whose base material is a material that is less susceptible to brittle fracture than existing ceramics, such as plastic, metal, or glass, with the aim of providing to the market a photocatalytic filter that is at least less susceptible to brittle fracture than a photocatalytic filter whose base material is alumina ceramic, and preferably a photocatalytic filter that is even stronger, can be easily formed into any shape and size, and is light and thin. According to the invention described in Patent Document 2, the base material of the photocatalytic filter can be selected from a wide range of materials, such as plastic, metal, and glass. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Re-tabled publication No. 2012-117547 [Patent Document 2] Patent No. 5395253 Summary of the Invention [Problem to be solved by the invention]

[0012] Commercially available air purifiers consist of a dust filter, a HEPA filter (high efficiency air filter), and an activated carbon filter. The activated carbon filter is used for deodorization.

[0013] If the activated carbon filter of an existing air purifier can be replaced with a photocatalyst module, a new function of oxidative decomposition of harmful substances by photocatalysis can be added without modifying the existing air purifier. This can reduce the cost of developing and manufacturing an air purifier incorporating the function of oxidative decomposition of harmful substances by photocatalysis. In addition, the performance of the air purifier can be improved because a sterilization effect is added to the conventional deodorizing effect. Furthermore, if the photocatalyst module can be applied to devices that have the function of taking in air, such as air conditioners and various fans, it is possible to add new air purification capabilities to various devices while reducing the cost of development and manufacturing.

[0014] An object of the present invention is to easily add a function of oxidative decomposition of harmful substances by photocatalysis to existing equipment without making any modifications. [Means for solving the problem]

[0015] The first aspect is a photocatalytic filter including a plate-shaped member having a plurality of air passage holes communicating between the front surface and the back surface, and a photocatalytic layer supported on at least the back surface of the plate-shaped member; a light source fixing plate having a plurality of photocatalyst excitation light sources fixed to the back surface and having a light source fixing plate opening communicating between the front surface and the back surface; a first frame body; and a second frame body that is combined with the first frame body with the inside of the second frame body facing the inside of the first frame body, and the first frame body has a first frame body that communicates between the outside and the inside. a first frame body opening is provided, the air passage hole of the photocatalytic filter is positioned within the first frame body opening, the front surface of the photocatalytic filter faces the inside of the first frame body, and the photocatalytic filter is arranged inside the first frame body; the second frame body is provided with a second frame body opening communicating the outside and the inside, the light source fixing plate opening is positioned within the second frame body opening, and the front surface of the light source fixing plate faces the inside of the second frame body, and the light source fixing plate is arranged inside the second frame body.

[0016] A second aspect is a photocatalyst module in which, in the first aspect, the second frame body is extended in a direction facing the first frame body, determines the distance between the photocatalyst excitation light source and the photocatalyst layer, and includes a photocatalyst filter holding support portion for holding the photocatalyst filter arranged on the first frame body.

[0017] A third aspect is a photocatalyst module in which, in the first or second aspect, the first frame body is extended in a direction facing the second frame body, determines the distance between the photocatalyst excitation light source and the photocatalyst layer, and includes a light source fixing plate holding support portion for holding the light source fixing plate arranged on the second frame body.

[0018] A fourth aspect is the photocatalyst module according to the second or third aspect, wherein the photocatalyst filter pressing support portion is provided at a position corresponding to the peripheral edge portion of the catalytic filter.

[0019] A fifth aspect is the photocatalyst module according to the third or fourth aspect, wherein the light source fixing plate pressing support portion is provided at a position corresponding to the center of the light source fixing plate.

[0020] A sixth aspect is a photocatalyst module in which, in any of the first to fifth aspects, the first frame body has a first convex portion formed to be convex in a direction facing the second frame body, and the second frame body has a second concave portion formed to correspond to the first convex portion provided on the first frame body and which fits into the first convex portion when combined with the first frame body.

[0021] A seventh aspect is a photocatalyst module of the sixth aspect, wherein the first convex portion is extended in a direction facing the second frame body, determines the distance between the photocatalyst excitation light source and the photocatalyst layer, and is a light source fixing plate holding support portion for holding the light source fixing plate arranged on the second frame body.

[0022] An eighth aspect is a photocatalyst module in which, in any of the first to seventh aspects, the second frame body has a second convex portion formed to be convex in a direction facing the first frame body, and the first frame body has a first concave portion formed to correspond to the second convex portion provided on the second frame body and which fits into the second convex portion when combined with the second frame body.

[0023] A ninth aspect is a photocatalyst module in which, in any one of aspects 1 to 8, an engagement protrusion is extended from the outer periphery of the light source fixing plate, and an engagement recess is provided on the inner side of the second frame body with which the engagement protrusion engages.

[0024] A tenth aspect is a photocatalyst module according to the first to ninth aspects, wherein the first frame is provided with a first frame pillar that defines a plurality of first frame openings, and the photocatalyst filter is arranged corresponding to each of the plurality of first frame openings.

[0025] An eleventh aspect is a photocatalyst module according to the tenth aspect, wherein the second frame is provided with a second frame pillar that defines a plurality of second frame openings corresponding to the first frame pillar, and the light source fixing plate is positioned across the second frame pillar.

[0026] A twelfth aspect is a photocatalyst module according to the sixth aspect, wherein the second frame is provided with a second frame pillar that defines a plurality of second frame openings, the light source fixing plate is positioned across the second frame pillar, and the light source fixing plate holding support portion is provided at a position corresponding to the second frame pillar.

[0027] The thirteenth aspect is a photocatalyst module in any one of the first to twelfth aspects, wherein an engaging member is provided on one of the first frame body and the second frame body, and an engaged member is provided on the other frame body, which engages with the engaging member when the first and second frame bodies are combined.

[0028] A fourteenth aspect is a photocatalyst module according to the thirteenth aspect, wherein the engaging member is configured to include an elastically deformable claw member, and the engaged member is configured to include an insertion opening into which the claw member is inserted.

[0029] A fifteenth aspect is a photocatalyst module according to any one of the first to fourteenth aspects, wherein the photocatalyst layer is a titanium oxide layer, and the light source for exciting the photocatalyst is an ultraviolet light emitting diode.

[0030] A sixteenth aspect is a photocatalyst module in which, in any one of the first to fourteenth aspects, the photocatalyst layer is a tungsten oxide layer or a layer in which a precious metal is added to titanium oxide, and the light source for exciting the photocatalyst is a visible light emitting diode.

[0031] The 17th aspect is a photocatalyst module in which, in the 15th or 16th aspect, the light source fixing plate is a metal printed wiring board having printed wiring formed on a metal plate and electrically connected to the multiple photocatalyst excitation light sources.

[0032] The 18th aspect is a photocatalyst module of the 17th aspect, wherein the second frame body has a wiring cord through hole through which a wiring cord electrically connected to the printed wiring is inserted, and the wiring cord is electrically connected to a connector outside the second frame body.

[0033] A 19th aspect is a photocatalyst module in any of the 1st to 18th aspects, wherein the combined thickness of the first frame body and the second frame body is 30 mm or less, and the distance between the multiple photocatalyst excitation light sources and the photocatalyst layer is in the range of 3 mm to 22 mm.

[0034] A twentieth aspect is a photocatalyst module in which, in any of the first to eighteenth aspects, the combined thickness of the first frame body and the second frame body is 10 mm or less, the distance between the multiple photocatalyst excitation light sources and the photocatalyst layer is in the range of 1 mm to 3 mm, and the multiple photocatalyst excitation light sources are arranged closely adjacent to each other so that the variation in in-plane illuminance of the photocatalyst layer due to light irradiated from the multiple photocatalyst excitation light sources is below a certain level.

[0035] A 21st aspect is a plate-shaped member having a plurality of air passage holes communicating between the front surface and the back surface, being made of resin or ceramic, and having a plurality of recesses for accommodating light sources formed on the back surface; and a photocatalytic filter including a photocatalytic layer supported on at least the plurality of recesses for accommodating light sources of the plate-shaped member;

[0036] The photocatalyst module comprises a light source fixing plate having a plurality of photocatalyst excitation light sources fixed to the back surface thereof, the light source exciting light sources being large enough to accommodate one or more photocatalyst excitation light sources in the light source storage recess, and an opening in the light source fixing plate connecting the front surface and the back surface thereof formed therein; and a frame body in which the photocatalyst filter and the light source fixing plate are housed, with the back surfaces of the photocatalyst filter and the light source fixing plate facing each other so that one or more of the photocatalyst excitation light sources can be stored in the light source storage recess.

[0037] A 22nd aspect is a photocatalyst module comprising: a light-transmitting plate-like member having a plurality of air passage holes connecting the front surface and the back surface and made of a light-transmitting resin that transmits light emitted by a light source for exciting a photocatalyst; a photocatalyst filter including a photocatalyst layer supported on at least the front surface of the light-transmitting plate-like member and excited by the light emitted by the light source for exciting a photocatalyst; and a light reflecting layer supported on the back surface of the light-transmitting plate-like member and reflecting the light emitted by the light source for exciting a photocatalyst; and a frame member supporting a side surface of the photocatalyst filter and to which the light source for exciting a photocatalyst is fixed, emitting light toward the side surface.

[0038] A twenty-third aspect is the photocatalyst module of the twenty-first aspect, wherein the thickness of the frame is 10 mm or less.

[0039] A twenty-fourth aspect is the photocatalyst module of the twenty-second aspect, wherein the thickness of the frame member is 10 mm or less.

[0040] A twenty-fifth aspect is a photocatalyst module in any one of the first to twenty-first and twenty-third aspects, wherein the plate-shaped member made of resin is made of a fluororesin.

[0041] The 26th aspect is a photocatalyst module in which, in any of the 1st to 21st aspects and the 23rd and 25th aspects, the plate-shaped member made of ceramic is made of an alumina ceramic porous body.

[0042] A 27th aspect is a photocatalyst module in which, in any of the first to 26th aspects, the first frame body and the second frame body or the frame body or the frame member are made of polycarbonate molded with the addition of an antioxidant.

[0043] A twenty-eighth aspect is a photocatalyst module in any one of the first to twenty-seventh aspects, wherein the photocatalyst layer is a titanium oxide layer, and the light source for exciting the photocatalyst is an ultraviolet light emitting diode.

[0044] A 29th aspect is a photocatalyst module in which, in any of the 1st to 27th aspects, the photocatalyst layer is a tungsten oxide layer or a layer in which a precious metal is added to titanium oxide, and the light source for exciting the photocatalyst is a visible light emitting diode.

[0045] A thirtieth aspect is an electrical appliance having an air intake in any one of the first to twenty-ninth aspects, the electrical appliance having a photocatalyst module built therein.

[0046] A thirty-first aspect is an electrical product having a built-in photocatalyst module, in which the photocatalyst module is stored in a filter storage location of the air purifier in the thirtieth aspect.

[0047] A thirty-second aspect is an electrical appliance with a built-in photocatalyst module, in which the photocatalyst module is installed at the air intake of the air conditioner or inside the air conditioner, in the thirtieth aspect.

[0048] A thirty-third aspect is an electrical product incorporating a photocatalyst module, in which the photocatalyst module is installed at an air intake of a fan in the thirtieth aspect.

[0049] A 34th aspect is a photocatalyst module in which, in any of the 1st to 29th aspects, the plate-shaped member is a plate-shaped member made of resin, ceramic, a composite of resin and ceramic, or gypsum board.

[0050] In a thirty-fifth aspect, in any one of the thirtieth to thirty-third aspects, the plate-like member is made of resin or

[0051] is an electrical product incorporating a photocatalyst module, which is a plate-shaped member made of ceramic, a composite of resin and ceramic, or gypsum board. Effect of the Invention

[0052] In the first to thirty-fifth aspects, the function of oxidative decomposition of harmful substances by photocatalysis can be easily added to existing devices such as air purifiers without modification. [Brief description of the drawings]

[0053] [Figure 1] FIG. 1 is a cross-sectional view of a photocatalyst module according to the first embodiment. [Diagram 2] FIG. 2(A) is a diagram showing a photocatalytic filter, and FIG. 2(B) is a diagram showing a photocatalytic filter made of ceramic. [Diagram 3] 3A and 3B are diagrams illustrating the first frame of the first embodiment, where FIG. 3A is a perspective view of the first frame as viewed from the inside, and FIG. 3B is a front view of the first frame as viewed from the outside. [Figure 4] FIG. 4 is a diagram of the second frame in which the light source fixing plate is disposed, as viewed from the inside. [Diagram 5] FIG. 5 is a diagram of the second frame in which the light source fixing plate is arranged, as viewed from the outside. [Figure 6] FIG. 6 is a perspective view showing the combined state of the first frame and the second frame, and is a perspective view of the photocatalyst module seen from the outside of the first frame. [Figure 7] FIG. 7 is a perspective view showing the combined state of the first frame and the second frame, and is a perspective view of the photocatalyst module seen from the outside of the second frame. [Figure 8] FIG. 8 is a plan view of the photocatalyst module as viewed from the outside of the second frame. [Figure 9] 9(A) and (B) are diagrams illustrating an embodiment in which a photocatalyst module is applied to an air purifier. [Figure 10] 10(A) and (B) are diagrams illustrating an embodiment in which a photocatalyst module is applied to an air conditioner. [Figure 11] 11(A) and (B) are perspective views for explaining an embodiment in which a photocatalyst module is applied to a ceiling fan. [Figure 12] 12(A) and (B) are cross-sectional views for explaining an embodiment in which a photocatalyst module is applied to a ceiling fan. [Figure 13] FIG. 13 is a cross-sectional view of the photocatalyst module of the second embodiment. [Figure 14] FIG. 14 is a plan view illustrating the rear surface of the photocatalytic filter according to the second embodiment. [Figure 15] FIG. 15 is a cross-sectional view of a photocatalyst module according to the third embodiment. [Figure 16] FIG. 16 is an exploded perspective view showing components of the catalyst module of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] (First embodiment)

[0055] Hereinafter, a first embodiment of a photocatalyst module according to the present invention will be described with reference to Figs. 1 to 8.

[0056] FIG. 1 is a cross-sectional view of a photocatalyst module 1 of the first embodiment.

[0057] FIG. 2(A) is a diagram showing a photocatalytic filter 300, and FIG. 2(B) is a diagram showing a photocatalytic filter 300 made of ceramic.

[0058] As shown in FIG. 1, the first module 1 includes a first frame 100, two photocatalytic filters 300, one light source fixing plate 400, and a second frame 200. The first module 1 includes a first frame 100, two photocatalytic filters 300, a light source fixing plate 400, and a second frame 200.

[0059] As shown in FIG. 2(A), the photocatalytic filter 300 includes a plate-shaped member 310 and a photocatalytic layer 320.

[0060] The plate-shaped member 310 is made of resin or ceramic and has a plurality of air passage holes 330 that connect the front surface 300A and the back surface 300B. When the plate-shaped member 310 is made of resin, it is preferable to make it of a synthetic resin such as acrylic that has excellent weather resistance, i.e., oxidation inhibition, and it is particularly preferable to make it of a fluororesin that has excellent oxidation inhibition effect. For example, when molding the synthetic resin into a plate, a plurality of circular air passage holes 330 that penetrate the plate surface are molded at equal intervals at the same time.

[0061] Furthermore, the plate-like member 310 may be made of an inorganic material that has a good oxidation suppression effect. For example, the plate-like member 310 may be made of a composite of resin and ceramic, or a gypsum board.

[0062] The reason why a resin-ceramic bond is used is as follows. Plastic resins, although strong, cannot be used because they deteriorate due to photocatalytic reactions. Ceramic cloth, while not degraded by photocatalysis, cannot be used because it deforms. Therefore, for example, ceramic cloth is bonded to a plastic plate with holes, and used as a resin-ceramic bond as the base material for the photocatalytic filter. This makes it possible to compensate for the shortcomings of both resin and ceramic.

[0063] As shown in FIG. 2(B), when the plate-like member 310 is made of ceramic, it is desirable to make it of an alumina ceramic porous body having a large number of air passage holes 330.

[0064] At least the rear surface 300B of the plate-shaped member 310 is supported with a photocatalyst layer 320. The photocatalyst layer 320 is a titanium oxide (titanium dioxide) layer that is excited by ultraviolet light. Titanium oxide (titanium dioxide) of anatase type or a combination of anatase type and rutile type is preferably used. The photocatalyst layer 320 is a tungsten oxide layer that is excited by visible light or a layer in which a precious metal, such as platinum, is added to titanium oxide. For example, the rear surface 300B of the plate-shaped member 310 is sandblasted to form a rough surface base for support, and then the photocatalyst layer 320 is laminated on the plate-shaped member 310.

[0065] The photocatalyst layer 320 may be supported at least on the back surface 300B on the side irradiated with light emitted from the photocatalyst excitation light source 410 as shown in Fig. 1, but the photocatalyst layer 320 may be supported on the front surface 300A and on the side surface. The thickness of the photocatalyst filter 300 is, for example, 1 mm.

[0066] FIG. 4 is a diagram of the second frame 200 on which the light source fixing plate 400 is disposed, viewed from the inside 200B.

[0067] 1 and 4, a plurality of photocatalyst excitation light sources 410 for exciting the photocatalyst in the photocatalyst layer 320 are fixed and arranged on the back surface 400B of the light source fixing plate 400. The light source fixing plate 400 has a light source fixing plate opening 420 that communicates between the front surface 400A (the back surface in FIG. 4) and the back surface 400B.

[0068] The light source fixing plate 400 is configured to include, for example, an aluminum plate. The thickness of the light source fixing plate 400 is, for example, 1 mm. For example, six rectangular light source fixing plate openings 420 are opened in the light source fixing plate 400. Four light source fixing plate openings 420 are formed symmetrically above and below the central portion 400C of the light source fixing plate 400 in FIG. 4. For example, the light source fixing plate openings 420 are formed by punching an aluminum plate material.

[0069] When the photocatalytic layer 320 is a titanium oxide layer, for example, an ultraviolet light emitting diode (UV-LED) with a wavelength of 365 nm is used as the photocatalytic excitation light source 410. When the photocatalytic layer 320 is a tungsten oxide layer or a layer in which a precious metal such as platinum is added to titanium oxide, for example, a visible light emitting diode that emits light in the visible light region with a wavelength of 405 nm is used as the photocatalytic excitation light source 410. When an ultraviolet light emitting diode (UV-LED) is used as the photocatalytic excitation light source 410, the height above the light source fixing plate 400 is, for example, 2 mm. For example, 18 photocatalytic excitation light sources 410 are arranged at equal intervals on the back surface 400B of the light source fixing plate 400.

[0070] The light source fixing plate 400 is composed of a metal printed wiring board on which printed wiring 430 (partially shown by dashed lines in Figure 4) that is electrically connected to multiple photocatalyst excitation light sources 410 is formed on a metal plate such as an aluminum plate.

[0071] A wiring cord 440 is electrically connected to the printed wiring 430. A connector 450 is electrically connected to the wiring cord 440. Power of 0.5 to 1 W is supplied to the photocatalyst excitation light source 410 from a power source (not shown) via the connector 450.

[0072] A wiring cord through hole 290 is formed in the second frame body 200. When the light source fixing plate 400 is disposed on the inside 200B of the second frame body 200, the wiring cord 440 is inserted into the wiring cord through hole 290, and the connector 450 is disposed outside the second frame body 200.

[0073] As shown in FIG. 1, the second frame body 200 is assembled to the first frame body 100 with the inner side 200B of the second frame body 200 facing the inner side 100B of the first frame body 100.

[0074] FIG. 3 is a diagram illustrating the first frame 100 of the first embodiment. FIG. 3(A) shows the first frame 100.

[0075] 3(A) is a perspective view of the first frame 100 as viewed from the inside 100B, and FIG. 3(B) is a front view of the first frame 100 as viewed from the outside 100A.

[0076] 3, the first frame 100 is provided with a first frame opening 110 that connects the outside 100A and the inside 100B. The air passage hole 330 of the photocatalytic filter 300 is positioned within the first frame opening 110, and the front surface 300A of the photocatalytic filter 300 faces the inside 100B of the first frame 100, and the photocatalytic filter 300 is disposed on the inside 100B of the first frame 100.

[0077] The first frame 100 is provided with a first frame pillar 120 that defines a plurality (two) of first frame openings 110. Two photocatalytic filters 300 are arranged corresponding to each of the plurality (two) of first frame openings 110.

[0078] FIG. 5 is a diagram of the second frame 200 on which the light source fixing plate 400 is disposed, as viewed from the outside 200A.

[0079] 4 and 5, the second frame 200 is provided with a second frame opening 210 that communicates with the outside 200A and the inside 200B. The light source fixing plate opening 420 is positioned within the second frame opening 210, and the front surface 400A of the light source fixing plate 400 faces the inside 200B of the second frame 200, and the light source fixing plate 400 is disposed on the inside 200B of the second frame 200.

[0080] The second frame 200 is provided with second frame pillars 220 that define a plurality (two) of second frame openings 210 in correspondence with the first frame pillars 120 (see FIG. 3) of the first frame 100. The light source fixing plate 400 is disposed straddling the second frame pillars 220.

[0081] 4, the light source fixing plate 400 has a slit 400S at a central position 400C straddling the second frame pillar 220. A second frame pillar engaging portion 221 formed on the second frame pillar 220 on the inner side 200B of the second frame 200 engages with the slit 400S.

[0082] An engagement protrusion 460 extends from the outer periphery of the light source fixing plate 400. An engagement recess 260 is provided on a side surface of the inner side 200B of the second frame 200. The engagement protrusion 460 is engaged with the engagement protrusion 260.

[0083] The first frame 100 and the second frame 200 are desirably made of a material that is weather resistant, particularly one that inhibits deterioration due to oxidation. The first frame 100 and the second frame 200 are made of, for example, polycarbonate molded with the addition of an antioxidant.

[0084] Fig. 6 is a perspective view showing the combined state of the first frame 100 and the second frame 200, and is a perspective view of the photocatalyst module 1 seen from the outside 100A of the first frame 100. Note that in Fig. 6, the photocatalyst filter 300 and the light source fixing plate 400 are omitted.

[0085] Fig. 7 is a perspective view showing the combined state of the first frame 100 and the second frame 200, and is a perspective view of the photocatalyst module 1 as seen from the outside 200A of the second frame 200. Note that in Fig. 7, the light source fixing plate 400 is omitted.

[0086] As shown in Figs. 4, 6 and 7, the second frame 200 includes a photocatalytic filter pressing support 230 for pressing the photocatalytic filter 300 arranged in the first frame 100. The photocatalytic filter pressing support 230 is provided on the second frame 200 so as to extend in a direction facing the first frame 100. The photocatalytic filter pressing support 230 determines the distance between the photocatalytic excitation light source 410 and the photocatalytic layer 320 according to its length. The photocatalytic filter pressing support 230 is provided at a position corresponding to the peripheral portion of the photocatalytic filter 300. The photocatalytic filter pressing support 230 is provided near each corner of the second frame opening 210, for example, corresponding to each corner of the photocatalytic filter 300.

[0087] As shown in Fig. 3(A), Fig. 6, and Fig. 7, the first frame 100 includes a light source fixing plate pressing support portion 130 for pressing the light source fixing plate 400 arranged on the second frame 200. The light source fixing plate pressing support portion 130 is provided on the first frame 100 so as to extend in a direction facing the second frame 200. The light source fixing plate pressing support portion 130 determines the distance between the photocatalyst excitation light source 410 and the photocatalyst layer 320 according to its length. The light source fixing plate pressing support portion 130 is provided at a position on the first frame pillar 120 corresponding to the center portion 400C of the light source fixing plate 400 and the second frame pillar 220.

[0088] The first frame 100 has a first protrusion 130 formed to be protruding in a direction facing the second frame 200. The second frame 200 has a second recess 240 formed corresponding to the first protrusion 130 provided on the first frame 100, and fitted into the first protrusion 130 when combined with the first frame 100.

[0089] The first protrusion 130 also functions as the above-mentioned light source fixing plate pressing support portion 130. Note that the first protrusion 130 may be provided separately from the light source fixing plate pressing support portion 130.

[0090] The second frame 200 has a second convex portion 250 formed so as to be convex in the direction facing the first frame 100. The first frame 100 has a first concave portion 140 formed corresponding to the second convex portion 250 provided on the second frame 200, and fitted into the second convex portion 250 when combined with the second frame 200.

[0091] 6 and 7, an engaging member 270 is provided on a side surface of either the first frame body 100 or the second frame body 200. The other frame body is provided with an engaged member 150 that engages with the engaging member 270 when the first frame body 100 and the second frame body 200 are combined. For example, the engaged member 150 is provided on the first frame body 100, and the engaging member 270 is provided on the second frame body 200.

[0092] The engaging member 270 includes, for example, an elastically deformable claw member 271. The engaged member 150 includes an insertion opening 151 into which the claw member 271 is inserted.

[0093] FIG. 8 is a plan view of the photocatalyst module 1 as viewed from the outside 200A of the second frame 200. As shown in FIG.

[0094] The photocatalyst module 1 constructed as above is assembled as shown in FIG. 8 to be completed.

[0095] The combined thickness of the first frame 100 and the second frame 200 of the completed photocatalyst module 1 can be 30 mm or less. In this case, the distance between the multiple photocatalyst excitation light sources 410 and the photocatalyst layer 320 is in the range of 3 mm to 22 mm.

[0096] The thickness of the activated carbon filter of the air purifier is 30 mm or less, so the photocatalyst module 1 of the first embodiment can be housed in the narrow space in which the activated carbon filter is housed.

[0097] (First Example)

[0098] The photocatalyst module 1 of the first embodiment was configured as follows.

[0099] Thickness of the fluororesin plate member 310: 1.0 mm

[0100] ·Thickness of anatase type titanium oxide layer 320: Approximately 0.0 mm

[0101] 0.5W, 365nm wavelength ultraviolet light emitting diode (UV-LED) 410 thickness (height): 2.0mm

[0102] Aluminum light source fixing plate 400 thickness: 1.0mm

[0103] Thickness contributed by the first frame 100 and the second frame 200: 4.0 mm

[0104] Distance between the UV-LED 410 and the titanium oxide layer 320: 12.0 mm

[0105] As a result, the thickness of the photocatalyst module 1 could be made 20.0 mm.

[0106] The thickness of the photocatalyst module 1 of the first embodiment is preferably 10 mm or less. In this case, the distance between the multiple photocatalyst excitation light sources 410 and the photocatalyst layer 320 is in the range of 1 mm to 3 mm. However, in this case, it is preferable to adjust the arrangement and power of the multiple photocatalyst excitation light sources 410 so that the adjacent photocatalyst excitation light sources 410 are arranged close to each other so that the variation in the in-plane illuminance of the photocatalyst layer 320 due to the light irradiated from the multiple photocatalyst excitation light sources 410 is below a certain level.

[0107] By making the thickness of the photocatalyst module 1 of the first embodiment 10 mm or less, the photocatalyst module 1 can be easily accommodated in devices such as air conditioners and various fans, which have a narrower storage width than air purifiers.

[0108] (Second Example)

[0109] The photocatalyst module 1 of the second embodiment was configured as follows.

[0110] Thickness of the fluororesin plate member 310: 1.0 mm

[0111] ·Thickness of anatase type titanium oxide layer 320: Approximately 0.0 mm

[0112] 0.5W, 365nm wavelength ultraviolet light emitting diode (UV-LED) 410 thickness (height): 2.0mm

[0113] Aluminum light source fixing plate 400 thickness: 1.0mm

[0114] Thickness contributed by the first frame 100 and the second frame 200: 4.0 mm

[0115] Distance between the UV-LED 410 and the titanium oxide layer 320: 1.0 mm

[0116] As a result, the thickness of the photocatalyst module 1 could be reduced to 9.0 mm.

[0117] Furthermore, according to the second embodiment, the harmful substance decomposition performance per unit of power (wattage) can be improved compared to the first embodiment. Compared to the first embodiment, in the second embodiment, the power (wattage) supplied to the ultraviolet light emitting diodes 410 is lowered from 1 W to 0.5 W, and the number of ultraviolet light emitting diodes 410 is increased (for example, from 18 to 36), eliminating the variation in the amount of light. As a result, the light emitted by the ultraviolet light emitting diodes 410 can be used without attenuation. This allows the harmful substance decomposition performance per unit of power (wattage) to be improved by 25%.

[0118] 9, 10, 11, and 12 are diagrams for explaining application examples of the photocatalyst module 1. FIG.

[0119] In each figure, figure (A) shows the state before the photocatalyst module 1 is mounted, and figure (B) shows the state after the photocatalyst module 1 is mounted.

[0120] 9(A) and (B) are diagrams illustrating an embodiment in which the photocatalyst module 1 is applied to an air purifier 10. FIG.

[0121] As shown in FIG. 9, the photocatalyst module 1 is manufactured according to the size and thickness of the activated carbon filter of the commercially available air purifier 10. Then, the photocatalyst module 1 is stored in the storage location 11 of the activated carbon filter of the commercially available air purifier 10. Then, the male or female connector 450 of the photocatalyst module 1 is electrically connected to the corresponding female or male connector 12 of the air purifier 10. In this way, according to the photocatalyst module 1 of the first embodiment, the photocatalyst module 1 can be stored without modifying the existing air purifier 10. Therefore, it is possible to suppress the cost of newly developing and manufacturing an air purifier that incorporates the function of oxidative decomposition of harmful substances by photocatalysis. In addition, since a sterilization effect is newly added to the conventional deodorizing effect, the performance of the air purifier 10 can be improved.

[0122] 10(A) and (B) are diagrams illustrating an embodiment in which the photocatalyst module 1 is applied to an air conditioner 20.

[0123] As shown in Fig. 10, the photocatalyst module 1 of the first embodiment can be provided at the air intake 21 of an air conditioner 20. For example, the photocatalyst module 1 is provided so as to cover the air intake 21 provided at the top of the air conditioner 20. This allows the existing air conditioner 20 to be given the function of oxidative decomposition of harmful substances by photocatalysis without modification, and development and manufacturing costs can be reduced. Note that the photocatalyst module 1 can also be provided inside the air conditioner 20.

[0124] 11(A) and (B) are perspective views explaining an embodiment in which the photocatalyst module 1 is applied to a ceiling fan 30. Figs. 12(A) and (B) are cross-sectional views explaining an embodiment in which the photocatalyst module 1 is applied to a ceiling fan 30.

[0125] As shown in Figures 11 and 12, it is also possible to add the photocatalyst module 1 of the first embodiment to the air intake 32 of a ceiling fan 30. For example, the photocatalyst module 1 is installed so as to cover the air intake 32 provided in the fan cover 31 of the ceiling fan 30. This makes it possible to add the function of oxidative decomposition of harmful substances by photocatalysis to an existing ceiling fan 30 without making any modifications, thereby reducing development and manufacturing costs.

[0126] The photocatalyst module 1 can be added to various fans, not limited to ceiling fans. In order to store the photocatalyst module 1 in a space with a narrow storage width, such as an air conditioner 20 or a ceiling fan 30, it is desirable to use a photocatalyst module 1 with a thickness of 10 mm or less.

[0127] The photocatalyst module 1 can be incorporated into electrical products having an air intake in the same manner as the air purifiers, air conditioners, and various fans described above.

[0128] Second embodiment

[0129] A photocatalyst module 2 according to the second embodiment will be described.

[0130] Hereinafter, components similar to those in the photocatalyst module 1 of the first embodiment will be given the same reference numbers and descriptions thereof will be omitted as appropriate.

[0131] FIG. 13 is a cross-sectional view of a photocatalyst module 2 of the second embodiment.

[0132] FIG. 14 is a plan view illustrating the rear surface 300B of the photocatalytic filter 300 of the second embodiment.

[0133] The plate-shaped member 310 of the photocatalytic filter 300 is made of, for example, a synthetic resin or an alumina ceramic porous body having a large number of air passage holes 330. For example, the plate-shaped member 310 of the photocatalytic filter 300 can be made of a synthetic resin such as a fluororesin having a plurality of air passage holes 330, 331 molded therein.

[0134] The air passage hole 331 is an air passage hole formed in the light source storage recess 340, and has a smaller diameter than the air passage hole 330 formed in the flat portion 350 other than the light source storage recess 340 in order to enhance the effect of the photocatalytic action.

[0135] A plurality of light source storage recesses 340 are formed on the back surface 300B of the photocatalytic filter 300. The light source storage recess 340 is formed to a size large enough to store one or more photocatalyst excitation light sources 410. The inner surface shape of the light source storage recess 340 can be any shape, such as a dome shape or a hemisphere shape. However, it is preferable that the inner surface shape of the light source storage recess 340 is such that the light emitted by the photocatalyst excitation light source 410 stored therein is uniformly irradiated onto the surface of the photocatalyst layer 320 supported on the inner surface of the light source storage recess 340 to obtain the maximum light collection effect. The photocatalyst layer 320 may be supported on at least a plurality of light source storage recesses 340. The photocatalyst layer 320 may be supported over the entire surface including the flat portion 350 of the back surface 300B of the photocatalytic filter 300, or may be supported on the front surface 300A.

[0136] A plurality of catalyst excitation light sources 410 are arranged on the back surface 400B of the light source fixing plate 400. The catalyst excitation light sources 410 are large enough that one or more photocatalyst excitation light sources 410 can be stored in the light source storage recess 340. The plurality of catalyst excitation light sources 410 are arranged on the back surface 400B of the light source fixing plate 400 so that one or more photocatalyst excitation light sources 410 can be stored in the light source storage recess 340.

[0137] The frame 500 accommodates the photocatalytic filter 300 and the light source fixing plate 400 with the back surfaces 300B, 400B of the photocatalytic filter 300 and the light source fixing plate 400 facing each other, and may be composed of the first frame 100 and the second frame 200 as in the first embodiment, or may be a frame of another form having similar functions. As in the first embodiment, the frame 500 is desirably composed of a material that is weather resistant, particularly one that suppresses deterioration due to oxidation. The frame 500 is composed of, for example, polycarbonate molded with the addition of an antioxidant.

[0138] When the photocatalytic filter 300 and the light source fixing plate 400 are accommodated in the frame 500 with the back surfaces 300B, 400B of the photocatalytic filter 300 and the light source fixing plate 400 facing each other, one or more light sources 410 for exciting the photocatalyst are accommodated in the light source accommodation recess 340. In an example shown in FIG. 13, one light source 410 for exciting the photocatalyst is accommodated in the light source accommodation recess 340.

[0139] In order to accommodate two or more photocatalyst excitation light sources 410 in the light source accommodating recess 340, it is desirable to set the shape and size of the light source accommodating recess 340 to a shape and size suitable for accommodating two or more photocatalyst excitation light sources 410, such as by increasing the radius of curvature of the light source accommodating recess 340 as the number of light sources to be accommodated increases.

[0140] The frame 500 may be provided with the light source fixing plate pressing support portion 130 and the photocatalytic filter pressing support portion 230 as in the first embodiment, or the light source fixing plate pressing support portion 130 and the photocatalytic filter pressing support portion 230 may be omitted. In the example shown in Fig. 14, the rear surface 400B of the light source fixing plate 400 is pressed by the flat portion 350 of the rear surface 300B of the photocatalytic filter 300, so that the light source fixing plate pressing support portion 130 and the photocatalytic filter pressing support portion 230 can be omitted.

[0141] According to the photocatalyst module 2 of the second embodiment, the photocatalyst excitation light source 410 can be stored in the light source storage recess 340, and the thickness of the photocatalyst excitation light source 410 can be substantially eliminated, so that the thickness can be made the same as or less than that of the photocatalyst module 1 of the first embodiment. According to the photocatalyst module 2 of the second embodiment, the thickness can be made 10 mm or less.

[0142] Moreover, according to the photocatalyst module 2 of the second embodiment, the light collecting effect of the photocatalyst is enhanced by providing the light source storage recess 340. Therefore, compared to a photocatalyst module having the same number of photocatalyst excitation light sources 410 but not provided with the light source storage recess 340, the harmful substance decomposition performance per electric power (wattage) can be improved.

[0143] For example, the harmful substance decomposition performance per unit of power (wattage) can be improved by 20%. Similarly to the photocatalyst module 1 of the first embodiment, the photocatalyst module 2 of the second embodiment can also be incorporated into electrical appliances having air intakes, such as air purifiers, air conditioners, and various fans.

[0144] (Third Example)

[0145] The photocatalyst module 2 of the second embodiment was configured as follows.

[0146] Thickness of fluororesin plate member 310: 4.0 mm

[0147] ·Thickness of anatase type titanium oxide layer 320: Approximately 0.0 mm

[0148] Thickness (height) of the 0.5W, 365nm ultraviolet light-emitting diode (UV-LED) 410: 0.0mm (because it is stored in the light source storage recess 340)

[0149] Aluminum light source fixing plate 400 thickness: 1.0mm

[0150] Thickness contributed by frame 500: 4.0mm

[0151] As a result, the thickness of the photocatalyst module 2 could be reduced to 9.0 mm.

[0152] Third embodiment

[0153] A photocatalyst module 3 according to the third embodiment will be described.

[0154] Hereinafter, components similar to those in the photocatalyst module 1 of the first embodiment will be given the same reference numbers and descriptions thereof will be omitted as appropriate.

[0155] Fig. 15 is a cross-sectional view of a photocatalyst module 3 according to the third embodiment. In Fig. 15, the dashed lines are imaginary lines indicating the reflection path of light.

[0156] FIG. 16 is an exploded perspective view showing components of the catalyst module 3 of the third embodiment.

[0157] The light-transmitting plate-like member 600 is made of a light-transmitting resin that transmits the light emitted by the photocatalyst excitation light source 410, such as transparent acrylic, transparent polycarbonate, or light-transmitting fluororesin.

[0158] As in the first and second embodiments, it is desirable to use a material that is excellent at suppressing oxidation caused by ultraviolet irradiation and photocatalysis, or a material to which an additive has been added. The light-transmitting plate-shaped member 600 has a plurality of air passage holes 630 that communicate between the front surface 600A and the back surface 600B.

[0159] At least the front surface 600A of the light-transmitting plate-like member 600 supports the photocatalyst layer 320. The side surface 600C of the light-transmitting plate-like member 600 may also support the photocatalyst layer 320. For example, the light-transmitting plate-like member 600 is sandblasted to form a rough surface base for support, and then the photocatalyst layer 320 is laminated on the light-transmitting plate-like member 600.

[0160] A light reflecting layer 700 that reflects light emitted by the photocatalyst excitation light source 410 is supported on the back surface 600B of the light-transmitting plate-like member 600. The light reflecting layer 700 is supported on the light-transmitting plate-like member 600 by, for example, silver plating, attaching aluminum foil, coating with silver or aluminum, painting, or the like.

[0161] The light-transmitting plate-like member 600 , the photocatalytic layer 320 , and the light-reflecting layer 700 constitute the photocatalytic filter 300 .

[0162] The frame member 800 is a member that supports the side surface 600C of the photocatalytic filter 300, and is provided corresponding to at least one of the side surfaces 600C of the photocatalytic filter 300. A plurality of photocatalyst excitation light sources 410 that emit light toward the side surface 600C of the photocatalytic filter 300 are fixed to the frame member 800. In an example shown in FIG. 15, the frame member 800 is provided corresponding to both opposing side surfaces 600C of the photocatalytic filter 300. The frame member 800 may be provided corresponding to all the side surfaces 600C of the photocatalytic filter 300. As in the first embodiment, the frame member 800 is desirably made of a material that is weather resistant, particularly suppresses deterioration due to oxidation. The frame member 800 is made of, for example, polycarbonate or translucent fluororesin molded with an antioxidant added thereto.

[0163] According to the photocatalyst module 3 of the third embodiment, since it is configured to emit light from the photocatalyst excitation light source 410 provided in the frame member 800 toward the side surface 600C of the light-transmitting plate-like member 600, it can have a thickness equal to or less than that of the photocatalyst module 1 of the first embodiment. According to the photocatalyst module 3 of the third embodiment, the thickness can be made 10 mm or less.

[0164] Furthermore, according to the photocatalyst module 3 of the third embodiment, light is emitted from the photocatalyst excitation light source 410 toward the side surface 600C of the light-transmitting plate-shaped member 600, so that equivalent harmful substance decomposition performance can be obtained with a smaller number of light sources compared to the first and second embodiments.

[0165] For example, the decomposition performance of harmful substances per light source (UV-LED) can be improved by 30%.

[0166] Similarly to the photocatalyst module 1 of the first embodiment, the photocatalyst module 3 of the third embodiment can also be incorporated into electrical appliances having air intakes, such as air purifiers, air conditioners, and various fans.

[0167] (Fourth Example)

[0168] The photocatalyst module 3 of the third embodiment was configured as follows.

[0169] Thickness of the transparent acrylic light-transmitting plate member 600: 5.0 mm

[0170] ·Thickness of silver-plated light-reflective layer 700: Approximately 0.0 mm

[0171] ·Thickness of anatase type titanium oxide layer 320: Approximately 0.0 mm

[0172] Thickness (height) of the 3 W, 365 nm wavelength ultraviolet light emitting diode (UV-LED) 410: 0.0 mm (because it is disposed on the side surface 600C of the light-transmitting plate-like member 600)

[0173] Thickness contributed by frame member 800: 4.0 mm

[0174] As a result, the thickness of the photocatalyst module 3 could be reduced to 9.0 mm.

[0175] Although an embodiment of the present invention has been described above, the present invention is not limited to the above, and it is of course possible to implement the present invention in various other modified forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0176] 1 Photocatalyst module 100 First frame 200 2nd frame 300 Photocatalyst Filter 400 Light source fixing plate 410 Light source for photocatalyst excitation 500 frame 600 Light-transmitting plate-shaped member 700 Light reflective layer 800 Frame members

Claims

1. A photocatalytic filter including a plate-shaped member having a plurality of air passage holes communicating between the front surface and the back surface, and a photocatalytic layer supported on at least the back surface of the plate-shaped member; A light source fixing plate having a plurality of light sources for exciting a photocatalyst that excites the photocatalyst in the photocatalyst layer, fixed to the back surface thereof, and having a light source fixing plate opening that communicates with the front surface and the back surface; A first frame body; A second frame body that is assembled to the first frame body with the inside of the second frame body facing the inside of the first frame body. Equipped with The first frame is provided with a first frame opening that communicates with the outside and the inside, and the air passage hole of the photocatalytic filter is positioned within the first frame opening, and the front surface of the photocatalytic filter faces the inside of the first frame, and the photocatalytic filter is disposed inside the first frame; The second frame has a second frame opening communicating with the outside and the inside, the light source fixing plate opening is positioned within the second frame opening, and the front surface of the light source fixing plate faces the inside of the second frame, and the light source fixing plate is disposed inside the second frame. Photocatalytic module.

2. The second frame is A photocatalyst filter pressing support portion extending in a direction facing the first frame, defining a distance between the photocatalyst excitation light source and the photocatalyst layer, and for pressing the photocatalyst filter placed on the first frame. The invention is configured to include The photocatalyst module according to claim 1 .

3. The first frame is a light source fixing plate pressing support portion extending in a direction facing the second frame, defining a distance between the light source for exciting the photocatalyst and the photocatalyst layer, and for pressing the light source fixing plate disposed on the second frame; The invention is configured to include The photocatalyst module according to claim 1 or 2.

4. The photocatalytic filter pressing column is provided at a position corresponding to the peripheral edge of the photocatalytic filter. The photocatalyst module according to claim 2 or 3.

5. The light source fixing plate pressing support portion is provided at a position corresponding to a center portion of the light source fixing plate. The photocatalyst module according to claim 3 or 4.

6. the first frame body includes a first convex portion formed to be convex in a direction facing the second frame body, the second frame body is formed corresponding to the first protrusion provided on the first frame body, and includes a second recess portion that is fitted into the first protrusion portion when combined with the first frame body. The photocatalyst module according to any one of claims 1 to 5.

7. The first protrusion is a light source fixing plate pressing support portion extending in a direction facing the second frame, defining a distance between the light source for exciting the photocatalyst and the photocatalyst layer, and for pressing the light source fixing plate arranged on the second frame; The photocatalyst module according to claim 6.

8. the second frame body includes a second convex portion formed to be convex in a direction facing the first frame body, the first frame body is formed corresponding to the second protrusion portion provided on the second frame body, and includes a first recess portion that is fitted into the second protrusion portion when the first frame body is combined with the second frame body. The photocatalyst module according to any one of claims 1 to 7.

9. An engaging protrusion is provided on an outer periphery of the light source fixing plate, and an engaging recess with which the engaging protrusion is engaged is provided on an inner side surface of the second frame. The photocatalyst module according to any one of claims 1 to 8.

10. The first frame is provided with a first frame pillar that defines a plurality of first frame openings, and the photocatalytic filter is disposed corresponding to each of the plurality of first frame openings. The photocatalytic module according to any one of claims 1 to 9.

11. The second frame is provided with a second frame pillar that defines a plurality of second frame openings corresponding to the first frame pillar, and the light source fixing plate is disposed across the second frame pillar. The photocatalytic module according to claim 10.

12. The second frame is provided with a second frame pillar that defines a plurality of the second frame openings, and the light source fixing plate is disposed across the second frame pillar, The light source fixing plate pressing support portion is provided at a position corresponding to the second frame pillar. The photocatalyst module according to claim 6.

13. An engaging member is provided on one of the first frame body and the second frame body, and an engaged member that is engaged with the engaging member when the first and second frame bodies are combined is provided on the other frame body. The photocatalytic module according to any one of claims 1 to 12.

14. The engaging member includes an elastically deformable claw member, and the engaged member includes an insertion opening into which the claw member is inserted. The photocatalytic module according to claim 13.

15. The photocatalytic layer is a titanium oxide layer, The photocatalyst excitation light source is an ultraviolet light emitting diode. The photocatalytic module according to any one of claims 1 to 14.

16. the photocatalyst layer is a tungsten oxide layer or a layer in which a precious metal is added to titanium oxide, The photocatalyst excitation light source is a visible light emitting diode. The photocatalytic module according to any one of claims 1 to 14.

17. The light source fixing plate is a metal printed wiring board having printed wiring formed on a metal plate and electrically connected to the plurality of photocatalyst excitation light sources. The photocatalyst module according to claim 15 or 16.

18. The second frame has a through hole through which a wiring cord electrically connected to the printed wiring is inserted, and the wiring cord is electrically connected to a connector outside the second frame. The photocatalytic module according to claim 17.

19. The combined thickness of the first frame and the second frame is 30 mm or less, and the distance between the plurality of photocatalyst excitation light sources and the photocatalyst layer is in the range of 3 mm to 22 mm. A photocatalytic module according to any one of claims 1 to 18.

20. The combined thickness of the first frame and the second frame is 10 mm or less, and the distance between the plurality of photocatalyst excitation light sources and the photocatalyst layer is in the range of 1 mm to 3 mm; The plurality of photocatalyst excitation light sources include Adjacent photocatalyst excitation light sources are arranged close to each other so that the variation in in-plane illuminance of the photocatalyst layer due to the light irradiated from the plurality of photocatalyst excitation light sources is kept at a certain level or less. A photocatalytic module according to any one of claims 1 to 18.

21. The plate-shaped member made of the resin is made of a fluororesin. A photocatalytic module according to any one of claims 1 to 20.

22. The plate-shaped member made of ceramic is made of an alumina ceramic porous body. A photocatalytic module according to any one of claims 1 to 21.

23. The first frame and the second frame or the frame or the frame member are made of polycarbonate molded with an antioxidant added. A photocatalytic module according to any one of claims 1 to 22.

24. The photocatalytic layer is a titanium oxide layer, The photocatalyst excitation light source is an ultraviolet light emitting diode. A photocatalytic module according to any one of claims 1 to 23.

25. the photocatalyst layer is a tungsten oxide layer or a layer in which a precious metal is added to titanium oxide, The photocatalyst excitation light source is a visible light emitting diode. A photocatalytic module according to any one of claims 1 to 23.

26. An electrical appliance having an air intake, A photocatalyst module according to any one of claims 1 to 25 is incorporated. Electrical appliances.

27. The photocatalyst module is stored in the air purifier's filter storage area. An electrical product incorporating the photocatalytic module according to claim 26.

28. A photocatalyst module is installed in the air intake of the air conditioner or inside the air conditioner. An electrical product incorporating the photocatalytic module according to claim 26.

29. A photocatalytic module is installed at the fan's air intake. An electrical product incorporating the photocatalytic module according to claim 26.

30. 26. The photocatalyst module according to claim 1, wherein the plate-like member is a plate-like member made of resin, ceramic, a bond of resin and ceramic, or gypsum board.

31. 30. An electrical product incorporating the photocatalyst module according to any one of claims 26 to 29, wherein the plate-like member is a plate-like member made of resin, ceramic, a bond of resin and ceramic, or gypsum board.

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