Photocatalyst sheet module and photocatalyst sheet module structure

Abstract

To provide a photocatalyst sheet module and a photocatalyst sheet module structure capable of improving performance exhibited by a photocatalyst and thereby improving utilization efficiency of light from a light source.SOLUTION: A photocatalyst sheet module 1 includes at least one light source 20 (1) to 20 (n), and a photocatalyst sheet 10 carrying a photocatalyst that reacts with light from the at least one light source 20 (1) to 20 (n). The photocatalyst sheet 10 has a mountain and valley shape in which mountain parts and valley parts are alternately continued. In the photocatalytic sheet 10, intervals d (1) to d (m) between bottom parts (10v, 10v),., (10v, 10v) in adjacent valley parts are larger as they are farther from shortest positions P (1) to P (n) closest to at least one of the light sources 20 (1) to 20 (n).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a photocatalytic sheet module and a photocatalytic sheet module structure. [Background technology]

[0002] A conventional photocatalyst sheet module has been known which comprises a light source and a photocatalyst sheet carrying a photocatalyst that reacts to light from the light source, the photocatalyst sheet having a peak-valley shape in which peaks and valleys alternate continuously (see, for example, Patent Document 1).

[0003] In detail, Patent Document 1 discloses a pleated photocatalytic filter unit (photocatalytic sheet module) in which a photocatalytic filter (photocatalytic sheet) can be attached to a casing alone while maintaining a desired pleat shape (for example, a pleat pitch within a certain range), and the photocatalytic filter can be easily replaced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-36475 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in such conventional photocatalyst sheet modules, the peaks of the uneven shape create areas where the light from the light source is blocked (shadow areas). As a result, the photocatalyst carried in the light-blocking areas does not react sufficiently, which reduces the performance of the photocatalyst and therefore reduces the light utilization efficiency.

[0006] The present disclosure aims to provide a photocatalyst sheet module and a photocatalyst sheet module structure that can improve the performance of a photocatalyst, thereby improving the efficiency of using light from a light source. [Means for solving the problem]

[0007] In order to solve the above problems, the present disclosure provides the following photocatalytic sheet module and photocatalytic sheet module structure.

[0008] (1) Photocatalytic sheet module The photocatalyst sheet module according to the present disclosure comprises at least one light source and a photocatalyst sheet carrying a photocatalyst that reacts to light from the at least one light source, wherein the photocatalyst sheet has a peak-valley shape in which peaks and valleys alternate and continue, and the spacing between the bottoms of adjacent valleys increases as the spacing increases from the shortest position closest to the at least one light source.

[0009] (2) Photocatalytic sheet module structure The photocatalyst sheet module structure according to the present disclosure comprises a photocatalyst sheet carrying a photocatalyst that reacts to light from at least one light source, the photocatalyst sheet having a peak-valley shape with alternating peaks and valleys, and the spacing between the bottoms of adjacent valleys increases as the distance from the shortest position closest to the at least one light source increases. [Effects of the Invention]

[0010] According to the present disclosure, the performance exhibited by the photocatalyst can be improved, thereby making it possible to improve the efficiency of use of light from a light source. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing an example of a photocatalyst sheet module of a basic configuration according to the present embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the photocatalyst sheet module shown in FIG. 1, viewed obliquely from above. [Figure 3] FIG. 2 is an exploded perspective view of the photocatalyst sheet module shown in FIG. 1, viewed obliquely from below. [Figure 4] FIG. 2 is a cross-sectional view showing the positional relationship between a photocatalyst sheet and a group of point light sources, which is an example of a plurality of light sources. [Figure 5] FIG. 10 is a cross-sectional view showing the positional relationship between a photocatalyst sheet and a point light source, which is another example of the light source. [Figure 6] FIG. 10 is a cross-sectional view showing the positional relationship between a photocatalyst sheet and a linear light source, which is yet another example of a light source. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. The names and functions of the components are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0013] [Basic configuration of photocatalytic sheet module 1] First, with reference to Figs. 1 to 3, the basic structure of a photocatalyst sheet module 1 comprising a photocatalyst sheet 10 having a peak-valley shape in which peaks and valleys are alternately arranged in succession will be described below.

[0014] Fig. 1 is a perspective view showing an example of a photocatalyst sheet module 1 of a basic configuration according to this embodiment. Fig. 2 and Fig. 3 are exploded perspective views of the photocatalyst sheet module 1 shown in Fig. 1 as seen obliquely from above and below, respectively.

[0015] 1 to 3, the photocatalyst sheet module 1 has an outer shape of a rectangular parallelepiped. However, the photocatalyst sheet module 1 is not limited to this shape.

[0016] The photocatalyst sheet module 1 comprises at least one (n) light source 20(1) to 20(n) (n is an integer of 1 or 2 or more, for example, n=3) (see FIG. 3) and a photocatalyst sheet 10.

[0017] The light sources 20(1) to 20(n) have an irradiation angle and irradiate light onto the photocatalyst sheet 10. It is preferable to use light sources that emit ultraviolet light as the light sources 20(1) to 20(n). In this example, the light sources 20(1) to 20(n) are provided on one side of the photocatalyst sheet 10, and irradiate light from one side of the photocatalyst sheet 10. In this configuration, the number of light sources 20(1) to 20(n) can be reduced. The light sources 20(1) to 20(n) may be provided on both sides of the photocatalyst sheet 10, respectively, and may irradiate light from both sides of the photocatalyst sheet 10. In this case, the performance of the photocatalyst can be improved compared to when the light sources 20(1) to 20(n) are provided on one side of the photocatalyst sheet 10.

[0018] Examples of the light sources 20(1) to 20(n) include a point light source, a group of point light sources in which a plurality of point light sources are arranged closely or densely, and a linear light source arranged parallel to the ridge direction E of the mountain-valley shape. A representative example of a point light source is a light-emitting element such as a light-emitting diode (LED). Examples of linear light sources include an array light source in which point light sources such as light-emitting elements are arranged in an array, and a fluorescent lamp.

[0019] The photocatalyst sheet 10 carries a photocatalyst (not shown) that reacts to light from the light sources 20(1) to 20(n). Photocatalyst is a general term for a substance that absorbs light and promotes a chemical reaction. When exposed to light, the photocatalyst promotes an oxidation-reduction reaction, and can exhibit antibacterial and antiviral effects, as well as a deodorizing effect through the oxidative decomposition of volatile organic compounds (VOCs). As the photocatalyst, for example, known photocatalysts such as titanium oxide (TiO2) and tungsten oxide (WO3) can be used, and among these, titanium oxide is preferably used.

[0020] In this example, the photocatalyst sheet 10 is made of a sheet material (for example, a sheet-like member made of nonwoven fabric) with a photocatalyst applied to at least one of its surfaces (both surfaces in this example). Here, the sheet material constituting the photocatalyst sheet 10 is light-transmitting, so not only the photocatalyst applied to the surface of the photocatalyst sheet 10 facing the light sources 20(1) to 20(n), but also the photocatalyst applied to the surface opposite the light sources 20(1) to 20(n) can react to light from the light sources 20(1) to 20(n).

[0021] In the photocatalyst sheet module 1, air containing bacteria, viruses, and volatile organic compounds is taken in from the outside and flows along both sides of the photocatalyst sheet 10, and light from the light sources 20(1) to 20(n) is irradiated onto the photocatalyst sheet 10, thereby oxidizing and decomposing the bacteria, viruses, and volatile organic compounds.

[0022] More specifically, the photocatalyst sheet module 1 further includes a case 31 and an upper cover 32. A light source substrate 33 (see FIGS. 2 and 3) having light sources 20(1) to 20(n) is provided on the underside of the upper cover 32. In this example, the light source substrate 33 is an LED substrate on which a plurality of LEDs are mounted.

[0023] The case 31 has a rectangular, flat bottom plate 31a (see FIG. 2), a pair of first side plates 31b1, 31b1, a pair of second side plates 31b2, 31b2, a pair of first support columns 31c1, 31c1, and a pair of second support columns 31c2, 31c2. The first side plates 31b1, 31b1 are integrally erected on the top lid 32 side from both ends of the bottom plate 31a in the short direction S. The second side plates 31b2, 31b2 are integrally erected on the top lid 32 side from both ends of the bottom plate 31a in the long direction L. The photocatalyst sheet 10 is fixed to the inner surface 31a1 (bottom surface) (see FIG. 2) of the bottom plate 31a via a shape-retaining member 11 (see FIGS. 2 and 3). The heights of the first side plates 31b1, 31b1 and the second side plates 31b2, 31b2 from the inner surface 31a1 of the bottom plate 31a [height in the optical axis direction N (height direction)] are lower by a predetermined dimension than the height of the photocatalyst sheet 10 from the inner surface 31a1 of the bottom plate 31a, as shown in Fig. 1. The first supports 31c1, 31c1 are erected integrally with the top lid 32 from both corners of the end on one side L1 in the longitudinal direction L of the bottom plate 31a. The second supports 31c2, 31c2 are erected integrally with the top lid 32 from both corners of the end on the other side L2 in the longitudinal direction L of the bottom plate 31a. The first supports 31c1, 31c1 and the second supports 31c2, 31c2 have different shapes of their tips.

[0024] The top lid 32 has a rectangular, flat lid main body 32a, a pair of first joint portions 32b1, 32b1, a pair of second joint portions 32b2, 32b2, and one or more (four in this example) board holders 32c. The first joint portions 32b1, 32b1 are formed at both corners of one side L1 in the longitudinal direction L of the lid main body 32a, and have shapes that allow them to be joined to the tips of the first support columns 31c1, 31c1 of the case 31. The second joint portions 32b2, 32b2 are formed at both corners of the other side L2 in the longitudinal direction L of the lid main body 32a, and have shapes that allow them to be joined to the tips of the second support columns 31c2, 31c2 of the case 31. The top surfaces of the first support columns 31c1, 31c1 and the second support columns 31c2, 31c2 of the case 31 are flush with the top surface of the top cover 32, as shown in FIG.

[0025] As shown in FIG. 3, the substrate holding portion 32c is composed of one or more (two in this example) first holding portions 32c1, 32c1, one or more (two in this example) second holding portions 32c2, 32c2, and one or more (one in this example) third holding portions 32c3.

[0026] The first holding portions 32c1, 32c1 restrict movement in the optical axis direction N, movement in the ridge direction E, and movement toward one side F1 in the crest-valley direction F perpendicular to the ridge direction E. The first holding portions 32c1, 32c1 are formed in an L-shape in a cross section taken along the ridge direction E, and are also formed in an L-shape in a cross section taken along the crest-valley direction F. The second holding portions 32c2, 32c2 restrict movement in the optical axis direction N and movement toward the ridge direction E. The second holding portions 32c2, 32c2 are formed in an L-shape in a cross section taken along the ridge direction E. The third holding portion 32c3 restricts movement toward the other side F2 in the crest-valley direction F. The third holding portion 32c3 is formed in an I-shape in a cross section taken along the crest-valley direction F. The third holding portion 32c3 is provided integrally with the tip of the swinging portion 32d. The swinging portion 32d is flexible (elastic), and its base end is integrally formed with the lid body 32a. When no external force is applied, the swinging portion 32d maintains a posture aligned with the lid body 32a. When an external force is applied, the swinging portion 32d swings about an axis along the ridge direction E, and when the applied external force is released, the swinging portion 32d returns to a posture aligned with the lid body 32a.

[0027] The light source substrate 33 is a rectangular flat plate. The light sources 20(1) to 20(n) are arranged in one or more rows (one row in this example) at the center of the light source substrate 33 in the ridge direction E along the crest-valley direction F. However, the configuration of the light sources 20(1) to 20(n) is not limited to this configuration.

[0028] The light source substrate 33 abuts against the third holding portion 32c3 in the upper lid 32, bending the swinging portion 32d toward the opposite side of the photocatalyst sheet 10, and is fitted into the first holding portions 32c1, 32c1 and the second holding portions 32c2, 32c2 from the second bonding portions 32b2, 32b2 side toward the first bonding portions 32b1, 32b1 side. At this time, the swinging portion 32d returns to a position aligned with the lid main body 32a. This allows the first holding portions 32c1, 32c1, the second holding portions 32c2, 32c2, and the third holding portion 32c3 to restrict movement of the light source substrate 33 in the optical axis direction N, the ridge direction E, and the peak-valley direction F. Therefore, the light source substrate 33 can be securely held on the inner surface of the upper lid 32. Wiring to the light sources 20(1) to 20(n) is not shown.

[0029] The case 31, the upper cover 32, and the light source board 33 act as a light source holder that holds the light sources 20(1) to 20(n).

[0030] [About this embodiment] Next, the details of the peak-valley shape of the photocatalyst sheet 10 will be explained below with reference to Figs.

[0031] Fig. 4 is a cross-sectional view showing the positional relationship between the photocatalyst sheet 10 and a group of point light sources 21-21, which is an example of a plurality of light sources 20(1)-20(n). Fig. 5 is a cross-sectional view showing the positional relationship between the photocatalyst sheet 10 and a point light source 22, which is another example of the light source 20(i) (i is any value from 1 to n). Fig. 6 is a cross-sectional view showing the positional relationship between the photocatalyst sheet 10 and a linear light source 23, which is yet another example of the light source 20(i). Note that the light sources 20(1)-20(n) and the corresponding peak-valley shaped portions of the photocatalyst sheet 10 all have the same configuration, so Figs. 5 and 6 show one light source 20(i) and the corresponding peak-valley shaped portion of the photocatalyst sheet 10 as a representative.

[0032] The photocatalyst sheet 10 has a mountain-valley shape in which mountain portions and valley portions alternate continuously. In the photocatalyst sheet 10, the mountain portions are on the light source 20(1) to 20(n) side, and the valley portions are on the opposite side of the light sources 20(1) to 20(n). Here, the peaks 10m to 10m (highest parts) of the mountain portions and the bottoms 10v to 10v (lowest parts) of the valley portions may or may not have mountain folds and valley folds. In this example, the peaks 10m to 10m and the bottoms 10v to 10v have mountain folds and valley folds, respectively. Therefore, the mountain-valley shape is a pleated shape in which mountain folds and valley folds alternate continuously.

[0033] As shown in Fig. 4, in the photocatalyst sheet 10, the intervals d(1) to d(m) (m is an integer of 2 or more) between the bottoms (10v, 10v), ..., (10v, 10v) of adjacent valleys increase as the photocatalyst sheet 10 moves away from the shortest positions P(1) to P(n) that are closest to at least one (n) light source 20(1) to 20(n). Note that the photocatalyst sheet 10 shown in Figs. 1 to 3 shows a basic configuration, and the intervals d(1) to d(m) between the bottoms (10v, 10v), ..., (10v, 10v) of adjacent valleys are uniform.

[0034] With this configuration, it is possible to reduce or eliminate the areas on the photocatalyst sheet 10 where light from the light sources 20(1) to 20(n) is blocked. This makes it possible to improve the performance of the photocatalyst, thereby improving the efficiency of using light from the light sources 20(1) to 20(n).

[0035] Here, with regard to the closest position P(i) closest to the light source 20(i), if the light source 20(i) is a point light source group 21 (see FIG. 4) in which a plurality of point light sources 21a-21a are closely or densely arranged, the closest position P(i) refers to the position corresponding to the shortest distance from the light emission center Q of the point light source group 21 (the central position of the point light sources (21a, ..., 21a) as a whole in the crest-valley direction F). If the light source 20(i) is a point light source 22 (see FIG. 5), the closest position P(i) refers to the position corresponding to the shortest distance from the light emission center Q of the point light source 22. If the light source 20(i) is a linear light source 23 (see FIG. 6) arranged so as to be parallel to the ridge direction E, the closest position P(i) refers to the position nearest to the light emission center Q of the linear light source 23 (the central position of the linear light source 23 in the crest-valley direction F).

[0036] The substrate holding portions 32c to 32c in the lid body 32a hold the light source substrate 33 so that the light emitting center Q of each light source 20(i) is located at the center in the ridge direction E of the photocatalyst sheet 10 on the inner surface of the lid body 32a, and the optical axis L20(i) of the light source 20(i) passes through the shortest position P(i).

[0037] First Embodiment In this embodiment, as shown in FIG. 5, the positional relationship between the first bottom 10v1(10v) (in this example, a valley fold), which is one of the bottoms 10v to 10v in the valley portion, and the first peak 10m1(10m) (in this example, a mountain fold), which is the peak located closest to the light source 20(i) relative to the first bottom 10v1(10v) among the peaks 10m to 10m in the peak portion, is as follows.

[0038] That is, the first angle θ1 formed by the first virtual straight line α1 connecting the light emitting center Q of the light source 20(i) and the first apex 10m1 (10m) and the optical axis L20(i) of the light source 20(i), which is perpendicular to the reference plane 10P (plane) along both the ridge direction E and the valley direction F, is smaller than the second angle θ2 formed by the second virtual straight line α2 connecting the light emitting center Q of the light source 20(i) and the first bottom 10v1 (10v) and the optical axis L20(i).

[0039] In this configuration, light from light source 20(i) can be directly irradiated not only to surface f1(f) facing the light source 20(i) but also to surface f2(f) (the surface between first bottom 10v1(10v) and first top 10m1(10m)) not facing the light source 20(i). This further improves the performance of the photocatalyst, thereby enabling more efficient use of light from light source 20(i).

[0040] In this example, the widths e to e of the faces f to f between the bottoms 10v to 10v and the tops 10m to 10m are all the same.

[0041] Second Embodiment In this embodiment, the peaks 10m-10m of the peaks and the bottoms 10v-10v of the valleys have mountain folds and valley folds, respectively, and the mountain-valley shape is a pleated shape in which the mountain folds and valley folds are alternately continuous.

[0042] With this configuration, it is possible to eliminate areas on the photocatalyst sheet 10 where light from the light sources 20(1) to 20(n) is blocked. This makes it possible to further improve the performance of the photocatalyst, thereby further improving the utilization efficiency of the light from the light sources 20(1) to 20(n).

[0043] In this embodiment, as shown in Figures 5 and 6, light from the light source 20(i) is directly irradiated onto the entire surface f1(f) of the photocatalyst sheet 10 between the valley fold of the first bottom 10v1 (10v), which is the bottom of the first valley portion, and the mountain fold of the second peak 10m2, which is the peak of the second peak portion adjacent to the first bottom 10v1 (10v) on the far side of the light source 20(i).

[0044] In this configuration, light from light source 20(i) can be directly irradiated not only to surface f1(f) facing the light source 20(i), but also to the entire surface f2(f) (the surface between first bottom 10v1(10v) and first top 10m1(10m)) that does not face the light source 20(i). This further improves the performance of the photocatalyst, thereby enabling more efficient use of light from light source 20(i).

[0045] In this embodiment, the height h (height in the optical axis direction N) of the peaks 10m to 10m of the mountain portions relative to the reference plane 10P along both the ridge direction E and the peak-valley direction F of the photocatalyst sheet 10 decreases as it moves away from the shortest position P(i).

[0046] In this configuration, it is possible to minimize or eliminate areas where light from the light source 20(i) is blocked by the peaks of the uneven shape (shadow areas).

[0047] Here, as in this embodiment, when the light source 20(i) is provided on one side of the photocatalyst sheet 10 and emits light from one side of the photocatalyst sheet 10, the reference plane 10P can be a plane passing through the bottoms 10v-10v in the valleys. In this case, the height h of the peaks 10m-10m in the peaks can be the height from the reference plane 10P passing through the bottoms 10v-10v. Note that when the light sources 20(i) are provided on both sides of the photocatalyst sheet 10 and emit light from both sides of the photocatalyst sheet 10, the reference plane 10P can be a plane passing through the intermediate portion (mid-portion) between the bottoms 10v-10v and the peaks 10m-10m. In this case, the height h of the peaks 10m-10m can be the height from the reference plane 10P passing through the intermediate portion (mid-portion) between the bottoms 10v-10v and the peaks 10m-10m.

[0048] The first bottom 10v1 (10v) does not always mean a specific bottom 10v among the multiple bottoms 10v to 10v of the photocatalyst sheet 10, but is a name used for convenience to distinguish one bottom 10v from the others. Similarly, the first top 10m1 (10m) and the second top 10m2 do not always mean a specific top 10m among the multiple tops 10m to 10m, but are names used for convenience to distinguish the two tops 10m, 10m adjacent to the first bottom 10v1 (10v) from the others.

[0049] Third Embodiment In this embodiment, the photocatalyst sheet module 1 further comprises a shape-retaining member 11 that retains the peak-valley shape of the photocatalyst sheet .

[0050] In this configuration, the shape-retaining member 11 maintains the peak-valley shape of the photocatalyst sheet 10, thereby reliably maintaining the peak-valley shape of the photocatalyst sheet 10. This allows the performance of the photocatalyst to be continuously improved, thereby enabling the efficient use of light from the light source 20(i) to be continuously maintained.

[0051] Examples of the shape-retaining member 11 include a rectangular sheet-like member that retains the entire bottom portions 10v-10v of the photocatalyst sheet 10, a pair of longitudinal members that retain both ends in the ridge direction E of the bottom portions 10v-10v of the photocatalyst sheet 10 along the longitudinal direction L, a frame-shaped bottom frame member that retains the outer periphery of the bottom portions 10v-10v of the photocatalyst sheet 10, and a frame-shaped intermediate frame member that retains the outer periphery of the intermediate portion (midsection) between the bottom portions 10v-10v in the valley portions and the peaks 10m-10m in the peak portions of the photocatalyst sheet 10. However, there are no particular limitations on the shape-retaining member as long as it has a shape that can retain the peak-valley shape of the photocatalyst sheet 10.

[0052] Here, when the shape-retaining member 11 is a sheet-like member, a pair of elongated members, or a bottom frame-like member, it may be a double-sided adhesive sheet (double-sided adhesive tape) for adhering itself to the photocatalyst sheet 10, or it may be a member made of a rigid material such as resin, on both sides of which an adhesive or double-sided adhesive sheet for adhering to the photocatalyst sheet 10 is provided. Also, when the shape-retaining member 11 is an intermediate frame-like member, it may be a member made of a rigid material such as resin, on which an adhesive or double-sided adhesive sheet for adhering to the photocatalyst sheet 10 is provided on the inner peripheral surface.

[0053] In this example, the shape-retaining member 11 is a pair of longitudinal members 11a, 11a each having a longitudinal shape that holds both ends of the bottom 10v-10v of the photocatalyst sheet 10 in the ridge direction E along the peak-valley direction F, and is itself a double-sided adhesive sheet.

[0054] <Fourth embodiment> The light sources 20(1) to 20(n) are point light sources 22, point light source groups 21, or linear light sources 23.

[0055] This configuration can be suitably applied to various types of light sources, and thus it is possible to easily achieve both suppression of cost increases and improvement of performance.

[0056] Fifth Embodiment In this embodiment, the photocatalyst sheet module structure is a structure in which the light sources 20(1) to 20(n) are excluded from the constituent members of the photocatalyst sheet module 1. That is, the photocatalyst sheet module structure is provided with a photocatalyst sheet 10 that carries a photocatalyst that reacts to light from at least one light source 20(1) to 20(n). The photocatalyst sheet 10 has a peak-valley shape in which peaks and valleys are alternately continuous. In the photocatalyst sheet 10, the distances d(1) to d(m) between the bottoms 10v to 10v of adjacent valleys increase with increasing distance from the shortest position P(1) to P(n) closest to at least one light source 20(1) to 20(n).

[0057] With this configuration, it is possible to reduce or eliminate the areas on the photocatalyst sheet 10 where light from the light sources 20(1) to 20(n) is blocked. This makes it possible to improve the performance of the photocatalyst, thereby improving the efficiency of using light from the light sources 20(1) to 20(n).

[0058] The present disclosure is not limited to the above-described embodiments, but can be implemented in various other forms. Therefore, the embodiments are merely examples in all respects and should not be interpreted as being limiting. The scope of the present disclosure is defined by the claims and is not bound by the text of the specification. Furthermore, all modifications and variations within the equivalent scope of the claims are within the scope of the present disclosure. [Industrial Applicability]

[0059] The present disclosure is applicable to applications relating to photocatalytic sheet modules and photocatalytic sheet module structures. [Explanation of symbols]

[0060] 1. Photocatalytic sheet module 10 Photocatalytic sheet 10P reference plane 10m top (mountain fold) 10m1 First summit (first mountain fold) 10m2 2nd apex (2nd mountain fold) 10v Bottom (valley fold) 10v1 1st bottom (1st valley fold) 11 Shape-retaining member 11a Longitudinal member 20 light source 21 Point light source group 21a Point light source 22 point light source 23 Linear light source 31 cases 31a Bottom plate 32 Top lid 32a Lid body 33 Light source board E Ridge direction F Mountain and valley direction L Longitudinal direction L1 One side L2 other side L20 optical axis P Shortest position Q luminous center S Short side direction d-spacing e width f side f1 side f2 plane α1 First virtual line α2 Second virtual line θ1 1st angle θ2 2nd angle

Claims

1. at least one light source; a photocatalyst sheet carrying a photocatalyst that reacts to light from the at least one light source; Equipped with The photocatalyst sheet module has a peak-valley shape in which peaks and valleys alternate and continue, and the distance between the bottoms of adjacent valleys increases as the distance increases from the shortest position closest to the at least one light source.

2. The positional relationship between a first bottom, which is one of the bottoms in the valley portion, and a first apex, which is the apex of the peak portion located closest to the light source relative to the first bottom, is such that a first angle formed by a first virtual straight line connecting the light-emitting center of the light source and the first apex and the optical axis of the light source, which is perpendicular to a reference plane along both the ridge direction of the peak-valley shape and the peak-valley direction perpendicular to the ridge direction, is smaller than a second angle formed by a second virtual straight line connecting the light-emitting center of the light source and the first bottom and the optical axis.

3. The photocatalyst sheet module according to claim 1, wherein the tops of the peaks and the bottoms of the valleys have mountain folds and valley folds, respectively, and the mountain-valley shape is a pleated shape in which the mountain folds and the valley folds are alternately continuous.

4. The photocatalyst sheet module of claim 3, wherein the light from the light source is directly irradiated onto the entire surface between the valley fold of the first bottom, which is the bottom of one of the valleys, the first valley portion, and the mountain fold of the second peak, which is the top of the second peak adjacent to the first bottom on the far side of the light source.

5. The photocatalyst sheet module according to any one of claims 1 to 4, further comprising a shape-retaining member that retains the peak-valley shape of the photocatalyst sheet.

6. A photocatalyst sheet module described in any one of claims 1 to 4, wherein the light source is a point light source, a group of point light sources arranged closely or densely together, or a linear light source arranged parallel to the ridge direction of the mountain-valley shape.

7. A photocatalyst sheet carrying a photocatalyst that reacts to light from at least one light source is provided, The photocatalyst sheet module structure has a peak-valley shape in which peaks and valleys alternate and continue, and the distance between the bottoms of adjacent valleys increases as the distance increases from the shortest position closest to the at least one light source.

Images