JP2010005163A - Clarification instrument using photocatalyst support board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clarification instrument which is improved in convenience when installed indoor etc. by effectively exerting a function of photocatalyst support boards. <P>SOLUTION: The housing of the clarification instrument 1a is provided with a body part 2, a ventilation cover part 3, and an installation cover part 4. The body part 2 is provided with ventilation housing surfaces 5a, 5b and 5c which enables inflow and outflow of air; and the ventilation cover part 3 is provided with a ventilation housing surface 6. Inside of the body part 2 is a hollow part which can house three photocatalyst support boards therein so as to constitute a right triangular prism. In the installation cover part 4, a through-hole 8 allowing a screw to pass therethrough is formed. In the ventilation housing surfaces 5, a large number of vent holes and a lens having a light condensing function are formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a purification device suitable for uses such as air purification and deodorization, and more particularly, to a purification device using a photocatalyst carrying board carrying photocatalyst particles, mainly fine particles of titanium oxide.

  It is known that a photocatalyst brings about a catalytic action by irradiation with light and has remarkable effects such as oxidation of organic substances, suppression of growth of microorganisms, and death. A technique for removing pollutants in the ambient atmosphere using such a photocatalyst is described, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 6-315614). In the technique described in the publication, a purification material formed into a sheet shape or a panel shape is configured by fixing a photocatalyst mainly composed of titanium dioxide or a mixture of titanium dioxide and activated carbon using a fluororesin or the like. The

  As an example of the location of the purification material, not only the case where it is installed outdoors such as the outer wall of a building, but also an example where it is installed indoors is described in paragraph [0026] of the above publication. Further, as shown in FIG. 9, there is also described an example in which a purifying material is supported without using an existing building or structure by providing an appropriate mount 16 and supporting the purifying material 13. .

However, the purification material supporting the photocatalyst has a problem of choking that the surface is chalked, and the purification material formed in the form of a sheet or panel has a small effective area for securing a contact surface with air. There was a difficulty in fully exerting the function of the photocatalyst. For example, when a sheet-shaped purification material is attached to a wall surface, the surface toward the indoor space is irradiated with light and air flows, so that the effect of deodorization can be exhibited, but the back surface is not exposed to light. Since the air permeability is not good, it cannot be used effectively. Furthermore, when installing the purification material indoors, various problems such as the necessity of securing a light source for 24-hour use and the securing of an installation location are confronted.
JP-A-6-315614

  The present invention has been made in view of the above-mentioned facts, and it is possible to further effectively exhibit the function of a photocatalyst carrying board, and to provide a purifying instrument with improved convenience when installed indoors or the like. Objective.

  In order to solve the above-mentioned problems, the present invention is a purification device for purifying air, and includes at least one ventilation housing surface formed with a plurality of ventilation holes, and a cavity defined by the ventilation housing surface. And a plurality of photocatalyst carrying boards, each of the photocatalyst carrying boards having a photocatalytic function on both sides, and air that has entered the cavity from the vent is provided on both sides of the photocatalyst carrying board. And the plurality of photocatalyst carrying boards arranged in the cavity so as to be able to flow along.

  According to the present invention, air flows in from the vent of the vent housing, flows along both sides of the photocatalyst carrying board, and then flows out through the vent of the vent housing. Further, since the light can enter the vent, air flows over both surfaces of the photocatalyst carrying board having a photocatalytic function, and external light is irradiated. Therefore, the function of the photocatalyst carrying board can be exhibited more effectively than when the photocatalyst carrying board is simply attached to the wall surface. Furthermore, even if choking occurs on the photocatalyst carrying board, the board is surrounded by the housing, so that the aesthetics of the room is not impaired.

  As an example, the housing may have a top portion, a main body portion, and a bottom portion, and at least a part of the surface of the main body portion and the bottom portion may be configured as the ventilation housing surface. In a preferred embodiment, at least three of the photocatalyst carrying boards are arranged so as to form the side surfaces of the polygonal columns, respectively. For example, when three photocatalyst carrying boards are prepared, this polygonal prism becomes a regular triangular prism. More preferably, the photocatalyst carrying board is disposed so that at least one surface of the photocatalyst carrying board faces the vent housing surface of the main body, and the photocatalyst carrying board is substantially perpendicular to the vent housing surface of the bottom part. Is arranged. With this arrangement, when the purifier is hung from the top or attached to the ceiling, the air flowing in from the bottom due to the rising airflow etc. can flow along both sides of the photocatalyst carrying board and come out from the vent housing surface of the main body Become. Of course, depending on the flow of the airflow, air entering from the ventilation housing surface of the main body may exit from the ventilation housing at the bottom. In any case, air can flow on both sides of the photocatalyst carrying board.

  In one aspect, the vent housing surface is constructed using a mesh member. Examples of the mesh member include a wire mesh having a large number of mesh openings. A preferred mesh member has a convex lens and a vent formed in the mesh portion. Due to the action of the convex lens, the external light is condensed on the photocatalyst carrying board inside the purification device, so that the photocatalytic function of the board can be further improved.

  In another aspect, at least the ventilation housing surface of the main body is configured using a lattice. For example, the lattice is composed of a plurality of transparent columnar members. Since a gap is formed between two adjacent columnar members, the void functions as a vent and provides good air permeability. Further, since the columnar member is transparent, it is advantageous in terms of lighting. Preferably, the columnar member has a convex surface in the outer direction of the housing. Thereby, since external light is condensed on the photocatalyst carrying board, the photocatalytic function can be further improved.

  In a further aspect of the present invention, at least one of the top and the bottom is configured as a detachable lid for closing the opening of the main body. This makes it possible to exchange the photocatalyst carrying board through the opening. Preferably, the main body includes board attachment means for slidably holding the photocatalyst carrying board. More preferably, when the lid is removed, the photocatalyst carrying board can be taken out from the opening of the main body by sliding along the board attaching means. This makes it very easy to replace the photocatalyst carrying board.

  In one aspect of the present invention, the lid includes attachment means for attaching the lid to a wall surface. Therefore, the purification device can be easily attached to the wall surface by attaching the main body portion containing the photocatalyst carrying board to the lid portion with the lid portion attached to the wall surface. In addition, the photocatalyst carrying board can be easily replaced. For example, the attachment means is a through hole for allowing a screw that can be screwed into the wall surface, or an adhesion means.

  In another aspect of the present invention, the lid portion is attached to a top plate portion detachable from the main body portion, a support column portion extending from a central portion of the top plate portion, and an upper end portion of the support column portion. A mounting disk, and the mounting disk includes the mounting means. Therefore, the purifying apparatus can be easily attached to the wall surface by attaching the main body portion containing the photocatalyst carrying board to the wall surface with the cover portion attached to the wall surface, or even when the cover portion and the main body portion are connected. Can be attached. In addition, the photocatalyst carrying board can be easily replaced. Preferably, a vent is formed in the top plate portion. Thereby, air permeability can be further improved.

  In a preferred aspect of the present invention, light emitting means is provided in the cavity. More preferably, the light emitting means is arranged to irradiate light to a surface of the photocatalyst carrying board that does not face the vent housing surface. In the case where a plurality of photocatalyst carrying boards are arranged in a polygonal column, a light emitting means is provided inside the polygonal column. Therefore, the photocatalytic function of the photocatalyst carrying board can be utilized more effectively. From the viewpoint of energy saving, it is preferable to use a solar cell panel as the power source of the light emitting means.

  In each of the above embodiments, the photocatalyst carrying board is preferably formed in a wave shape. Since this wavy shape increases the contact area with air, the photocatalytic function such as a deodorizing effect can be further improved.

According to the installation method as a preferred example of the present invention, the top of the purification device of the present invention is configured as the lid, and is attached to the ceiling of the room using the attachment means.
According to another embodiment of the present invention, there is provided a purification device capable of accommodating a photocatalyst carrying board for purifying air. The purification apparatus includes a housing having at least one vent housing surface formed with a plurality of vent holes and a cavity defined by the vent housing surface, the housing containing a plurality of photocatalyst carrying boards. Each of the photocatalyst carrying boards has a photocatalytic function on both sides, and when the photocatalyst carrying board is accommodated in the housing, the air that has entered the cavity from the vent is on both sides of the photocatalyst carrying board. Is arranged in the cavity so as to be able to flow along.

  This embodiment of the present invention can include the features of the invention according to each aspect described above. For example, the housing has a top portion, a main body portion, and a bottom portion, at least a part of the main body portion and the surface of the bottom portion is configured as the ventilation housing surface, and at least three photocatalyst carrying boards are provided. The photocatalyst carrying board can be arranged so as to form the side surfaces of the polygonal columns. The vent housing surface further has a light collecting function. Furthermore, at least one of the top and the bottom is configured as a removable lid for closing the opening of the main body. The main body includes board mounting means for slidably holding the photocatalyst carrying board. The lid portion has attachment means for attaching the lid portion to the wall surface. A light emitting means is provided in the cavity.

[Purification equipment]
Hereinafter, first to fourth embodiments of the purification instrument of the present invention will be described in detail with reference to the drawings.
(First embodiment of the purification device)
FIG. 1 shows an exploded perspective view of a purification device 1a according to the first embodiment of the present invention.

  As shown in FIG. 1, the housing of the purification device 1 a includes a main body portion 2, a ventilation lid portion 3, and an attachment lid portion 4. The main body 2 includes three first ring parts 9, second ring parts 12, and three ring parts arranged at equal intervals so as to connect the first ring part 9 and the second ring part 12. Column portions 7a, 7b, and 7c, and ventilation housing surfaces 5a, 5b, and 5c that are arranged between two adjacent column portions and allow air to enter and exit are provided. A screw portion 10 is formed on the outer peripheral surface of the first ring portion 9, and a screw portion 13 is formed on the outer peripheral surface of the second ring portion 12. The inside of the main body 2 is a hollow portion, and the hollow portion is defined by the ventilation housing surfaces 5a, 5b, and 5c and the pillar portions 7a, 7b, and 7c. As will be described later, the photocatalyst carrying board can be accommodated in the cavity.

  The ventilation lid portion 3 has a flat portion and a side wall extending from the flat surface. A ventilation housing surface 6 is formed on the flat portion, and a first ring portion 9 is formed on the inner side surface of the side wall. A screw portion 11 that can be screwed into the screw portion 10 is formed.

  The attachment lid portion 4 has a flat portion and a side wall extending from the flat surface. Three through holes 8 are formed in the flat portion, and a second ring is formed on the inner side surface of the side wall. A screw portion (not shown in FIG. 1; 25 in FIG. 10) that can be screwed into the screw portion 13 of the portion 12 is formed.

  By screwing the ventilation lid 3 into the main body 2 and screwing the attachment lid 3 into the main body 2, the purification device 1a is assembled as shown in FIG. In addition, the bottom view which looked at the purification instrument 1a from the ventilation cover part side is shown by FIG.

  FIG. 4 shows an example of a board mounting mechanism 20 (three 20a, 20b, and 20c are provided in the illustrated example) for mounting the photocatalyst carrying board inside the purification instrument 1a. The board mounting mechanism 20 includes columnar blocks 21a and 21b formed congruently, and slits 23a and 23b formed in the length direction are formed in the blocks 21a and 21b, respectively. Further, the block 21a and the block 21b are connected back to back through the connecting portion 22 so that the slits 23a, b are oriented at a predetermined angle. As shown in FIG. 4, each of the board mounting mechanisms 20a, 20b, and 20c is a connecting means (not shown) such as a bolt screwed from the pillar side or the connecting part 22 and the pillar part. Are connected by an adhesive between the inner surface and the inner surface. In addition, the block of the board attachment mechanism 20 and the connection means may be integrally formed.

  As shown in FIG. 5, the three photocatalyst carrying boards 30 a, 30 b, and 30 c can be disposed in the cavity of the main body 2 by inserting both end portions into opposing slits. As shown in FIG. 6, the photocatalyst carrying boards 30a, 30b and 30c according to the present embodiment are each formed in a flat rectangular shape having the same size, and have a photocatalytic function on both sides. When the photocatalyst carrying boards 30a, 30b and 30c are inserted from the ends of the slits of the board mounting mechanism 20, they can be moved along the slits as indicated by the arrows in FIG. can do. For example, as shown in FIG. 7, the photocatalyst carrying board 30 is inserted from the opening of the second ring portion 12 in a state where the ventilation lid portion 3 is screwed into the main body portion 2 and the attachment lid portion 4 is not attached. By inserting each slit between opposing slits and moving it downward, the lowermost end of the photocatalyst-carrying board comes into contact with the ventilation lid 3 and the attachment is completed. Thereby, as shown in FIG. 7, the three photocatalyst carrying boards can be easily attached in the main body 2. The three mounted photocatalyst carrying boards form a regular triangular prism as a whole, and the interior of the regular triangular prism is open to the ventilation housing surface 6 at the bottom, and each side surface of the regular triangular prism is a lateral ventilation housing. It faces the surfaces 5a, 5b and 5c. Further, it can be understood that the upper end of the photocatalyst carrying board is located at a position lower than the upper end of the ventilation housing surface 5 and there is a space that allows air to flow above the main body 2.

  When removing the photocatalyst carrying board, it can be easily removed simply by lifting the photocatalyst carrying board. Therefore, the work of exchanging the photocatalyst carrying board can be performed very easily.

  As shown in FIG. 8, the ventilation housing surfaces 5a, 5b, and 5c connect the metal mesh 31a having a large number of openings, between the adjacent column parts 5, and the first and second ring parts 9, It can be formed by attaching between 12 (by an adhesive, a screw or the like). Similarly, the ventilation housing surface 6 of the ventilation lid 3 can be easily formed by attaching the peripheral portion of the wire mesh 32 to the bottom edge plane 24 of the ventilation lid 3 as shown in FIG. it can.

  When installing the purification device 1a according to the present embodiment, as shown in FIG. 10, the attachment lid 4 is pressed against the ceiling 34, for example, and the wood screw 33 is screwed into the ceiling through the through hole 8. The mounting lid 4 is fixed to the ceiling. In this state, the purifying instrument 1a is placed on the ceiling 34 by pressing the main body 2 that has received the photocatalyst carrying board shown in FIG. 7 from below and screwing the screw portion 13 into the screw portion 25 of the lid portion 4. It can be installed easily.

  FIG. 11 shows an example in which the purification device 1a according to the present embodiment is installed on the ceiling 34. The white arrows indicate the main air flow, and the rising air flow in the room passes through the bottom ventilation housing surface 6 and enters the purification device 1a, and exits from the side ventilation housing surfaces 5a, 5b, and 5c. The state of going is shown.

  More specifically, as shown in FIG. 12, the air flows A1, A2, A3 out of the air flows A1, A2, A3, A4, A5, A6 through the bottom ventilation housing surface 6 are supported by three photocatalysts. It passes through the regular triangular prism formed by the board 30. The air flow A1 hits the inner wall surface of the mounting lid portion 4 and becomes air flows A10 and A11 to the side and exits from the ventilation housing surface 5. The air flows A2 and A3 The air flow A10, A11 to the side by the inner wall surface of the mounting lid 4 and exit from the ventilation housing surface 5. The air flows A4 and A5 pass outside the regular triangular prism formed by the three photocatalyst carrying boards 30 and travel along the surface of the photocatalyst carrying board 30 (the surface on the outside of the regular triangular prism). The air flows into the air flows A12 and A13 and exits from the ventilation housing surface 5. Further, the air flows A6 and A7 entering from the ventilation housing surface 5 hit the outside of the regular triangular prism formed by the photocatalyst carrying board 30, reverse the flow, and exit from the ventilation housing surface 5 again.

  11 and 12 show the flow of air when an updraft is present, but it is a matter of course that the flow differs from the example in the figure in a situation where another airflow such as a downdraft exists. In any case, according to the purification instrument 1a according to the present embodiment, air flows smoothly along both the front and back surfaces of the three photocatalyst carrying boards 30. Furthermore, since the ventilation housing surface is made of a wire mesh having a large number of openings, not only air but also external light can be taken into the purification device. For example, the light incident from the side ventilation housing surface 5 irradiates each surface of the photocatalyst supporting boards 30a, b, c, and the light incident from the bottom ventilation housing surface is irradiated on the photocatalyst supporting boards 30a, b, c. Irradiate each backside. Therefore, by using the purification device 1a according to the present embodiment, it becomes possible to effectively utilize the front and back surfaces having the photocatalytic function of the three photocatalyst carrying boards 30, and purification including deodorization of indoor air. The action can be remarkably promoted.

  FIG. 13 shows another configuration example of the wire mesh 35 in which the light collecting function is improved in the wire mesh used on the ventilation housing surface of the purification device 1a. The metal mesh 35 is configured by alternately arranging openings 37 for ventilation and light collecting parts 36 in which convex lenses 36 are embedded. Since external light is condensed on the photocatalyst carrying board by the action of the light condensing unit 36, the photocatalytic function of the board can be further improved.

FIG. 19 shows another example of photocatalyst carrying boards 60a, 60b, and 60c. The photocatalyst carrying board 60 is formed in a linear shape in the height direction and in a wave shape in the width direction perpendicular to the height direction. By inserting the photocatalyst carrying boards 60a, 60b, 60c in place of the flat photocatalyst carrying boards 30a, 30b, 30c, the surface area of the photocatalyst carrying board is increased, the contact area with air is increased, and the purification action is more effective. Can bring in.
(Second embodiment of the purification device)
FIG. 14 shows a purification device 1b according to a second embodiment of the present invention. In addition, about the same component as the purification instrument 1a of 1st Example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The purification device 1b according to the second embodiment uses an attachment lid portion 40 shown in FIG. 14 instead of the attachment lid portion 4 of the purification device 1a according to the first embodiment. The attachment mechanism for the main body 2, the ventilation lid 3, the photocatalyst carrying board, and the like are the same as in the first embodiment.

  The attachment lid portion 40 includes a top plate portion 44 that can be screwed into the main body portion 2, a support column portion 41 that extends from the center of the top plate portion 44, and an attachment device that is attached to the upper end portion of the support column portion 41. Disc 42. A long hole 45 for ventilation is formed in the top plate portion 44, and a through hole 43 is formed in the mounting disk 42. The distribution state of the length 45 is shown in detail in FIG. A hole can also be formed in the wall surface between the long hole 45 and the column part 41.

  When installing the purification device 1b, as shown in FIG. 10 relating to the first embodiment, the attachment disk 42 is pressed against the ceiling or the like, and the wood screw is screwed into the ceiling through the through hole 43, thereby attaching the purification instrument 1b. The lid portion 40 may be fixed to the ceiling, and the main body portion 2 may be screwed into the attachment lid portion 40 in this state. However, in the second embodiment, since there is a space below the through hole 43, the mounting disk 42 is pressed against the ceiling or the like with the purification device 1b assembled as shown in FIG. The purification device 1b can be quickly installed by screwing it into the ceiling through the hole 43.

In the purifying instrument of the first embodiment, since there is no hole in the attachment lid, the air that has entered from the bottom or side has to exit from the side. On the other hand, the purification device 1b of the second embodiment has a space between the top plate portion 44 and the disk 42 even when installed on the ceiling or the like, and air can be emitted from the long hole 45. Therefore, the air enters and exits the purification device more smoothly, and the purification function by the photocatalyst carrying board can be further improved.
(Third embodiment of purification device)
FIG. 16 shows a purification device 1c according to a third embodiment of the present invention. In addition, about the same component as the purification instrument 1a, 1b of the 1st and 2nd Example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 16, the purification device 1 c according to the third embodiment has a plurality of transparent parts as shown in FIG. 16 instead of the main body portion 2 having a ventilation housing surface using a wire mesh as in the first and second embodiments. A main body 50 is used in which various columnar members 51 are arranged to form a ventilation housing surface. The first ring portion 9, the ventilation lid portion 3, and the second ring portion 12 are the same as those of the first and second embodiments, but the upper end and the lower end of the columnar member 51 are respectively second. The ring portion 12 and the first ring portion 9 are fixedly connected. As for the lid for attachment, either the lid 4 of the first embodiment or the lid 40 of the second embodiment may be used. With respect to the board mounting mechanism 20, it may be attached to the inner surface of some selected columnar members 51, or may be provided with a pillar portion 3 and attached to this pillar portion as in the first embodiment. The columnar member 51 can be made of, for example, transparent acrylic.

The main body portion 50 constituted by the plurality of columnar members 51 has remarkably improved air permeability due to a gap between adjacent columnar members. Furthermore, as shown in FIG. 17A, the columnar member 51 is formed as a semi-cylinder having a convex surface and a flat surface, and is arranged so that the convex surface faces outward as shown in FIG. Accordingly, as shown in FIG. 17B, the external light is collected by the action of the convex surface and reaches the photocatalyst carrying board 30 disposed inside the main body 50. Thereby, according to the purification instrument 1c of the third embodiment, not only the air permeability but also the light collecting property can be further improved, and the purification action by the photocatalyst can be greatly increased.
(Fourth embodiment of the purification device)
In the first to third embodiments, when the photocatalyst carrying board is stowed inside, the surface of the photocatalyst carrying board is opposed to the side ventilation housing surface. External light is emitted from the housing. However, in order to promote the improvement of the photocatalytic function by irradiating the back side of the photocatalyst carrying board with stronger light, in the fourth embodiment of the purifying instrument, as shown in FIG. 18, three photocatalyst carrying boards are used. Illuminating means 55 and a power source 56 connected to the illuminating means 55 via a wire 57 are provided inside a regular triangular prism composed of 30a, 30b, and 30c. As this illumination means 55, LED or a wheat sphere can be used, for example. Sufficient light reaches the back side of the photocatalyst carrying board by the light emitted from the illuminating means 55. Therefore, the purification action can be further improved by effectively using both the front and back sides of the photocatalyst carrying board.

  As the power source 56, in addition to a battery such as a dry battery or a mercury battery, power may be supplied to the illumination unit 55 from an AC outlet used as a household power source via an AC-DC converter. When using a battery, for example, it is preferable that the battery is attached to a location that does not interfere with ventilation or lighting, such as the back side of the attachment lids 4 and 40.

  As a preferred example of the power source 56, a solar cell panel can be used. In this case, the solar cell panel may be disposed outside the purification device, or may be attached to the surface of the lid portions 3, 4, 40, the column portion 7, and the like.

  Although the above is each Example of the purification tool of this invention, the purification tool of this invention is not limited only to the said example. For example, three photocatalyst carrying boards are assembled in the shape of a regular triangular prism and accommodated in the main body, but any number of sheets can be used as long as the air that has entered the main body can flow along both sides of the photocatalyst carrying board. The photocatalyst carrying board can be assembled in an arbitrary form. For example, you may comprise in polygonal pillars, such as a quadratic prism and a pentagonal prism. Also, as shown in FIG. 25, a plurality of photocatalyst carrying boards can be arranged in a zigzag form. It is also possible to illuminate the photocatalyst carrying board inside the purification device by disposing the black light 55 ′ outside the purification device of FIG. 25. Note that a plurality of black lights 55 ′ may be prepared, and the photocatalyst carrying board may be illuminated from a plurality of directions.

  Moreover, although the cover parts 3, 4, and 40 can be screwed into the main-body parts 2 and 50, you may make it attach with other engaging means, such as a bayonet. Although the ventilation lid 3 is detachable from the main body 2, if the attachment lid is detachable, the ventilation lid 3 is fixed to the main body 2 or integrally formed. Also good.

  In the above example, the wood screw 33 is used to attach the attachment lid to the wall. However, an adhesive, a double-sided tape, a magic tape (registered trademark) is used on the contact surface between the attachment lid 4 or the disk 42 and the wall. ) Etc. can also be used.

  In the embodiment of FIG. 14, the disk 44 extending from the top plate portion 44 is used to install the purification device. However, a hook, string, chain, etc. are attached to the top plate portion 44 so that the purification device is suspended. Also good. Moreover, although the example which attaches a purification instrument to a ceiling was shown in the said Example, it is also possible to attach to other locations, for example on a desk, walls other than a ceiling, etc. Moreover, it is not limited only to the arrangement in which the attachment lid portion is on the upper side, and there may be an aspect in which the attachment lid portion is arranged on the lower side and the ventilation lid portion is arranged on the upper side. Furthermore, there may be an arrangement in which the purifying device is placed horizontally and obliquely. Further, not only a mode in which the purification device is fixed and attached, but also a mode in which the purification device is simply placed on a desk or the like without being fixed is conceivable.

  The shape of the photocatalyst carrying board is not limited to a rectangle, and may be created in other forms such as a polygon, a circle, an ellipse, etc. other than a rectangle. In addition, FIG. 19 shows an example in which the light-carrying board is configured in a wave shape. However, in order to increase the surface area of the board in addition to the wave shape in one direction, it can be formed in a wave shape in both the height and width directions, or on the surface. It is also conceivable to form irregularities and wrinkles.

In each of the above embodiments, the photocatalyst carrying board having no outer frame is shown. However, as will be described later, a photocatalyst carrying board having an outer frame can also be used.
In addition, the shape, size ratio, etc. of the main body part and the lid part can be arbitrarily changed according to the size of the photocatalyst carrying board.
[Photocatalyst carrying board]
Examples 1 and 2 of the photocatalyst-carrying board that can be used in the purification instrument according to the above-described embodiment of the present invention will be described below in detail with reference to FIGS.
(Example 1 of light-carrying board)
FIG. 20 is a perspective view with a partially enlarged view of an expanded metal used for producing a photocatalyst-supported board according to Example 1, and FIG. 21 is a schematic view of a metal sponge with a rubber sponge sheet and a rubber sheet stacked on an expanded metal filled with mixed powder. FIG. 22 is a schematic cross-sectional view showing a state where pressure molding is performed by a vertical pressing die made of metal, and FIG. 22 is a partially cutaway perspective view with a partially enlarged view of a completed photocatalyst-carrying board according to Example 1. FIG. 23 is a cross-sectional view of the finished product of the photocatalyst carrying board according to the first embodiment.
(Production of mixed powder)
90 g of anatase type titanium oxide powder (manufactured by Teika Co., Ltd., product number: AMT100, specification according to the catalog of the company: crystal form; anatase, specific surface area: 260 m ² / g, average particle size: 6 nm) and 10 g of PTFE powder capable of fibrillation ( Daikin Kogyo Co., Ltd., product number; Fine Powder F104) was mixed with a mixer (SUNBEAM-OSTER, PHOENIXBLENDER-KB-1), and stirred at a constant temperature of 50 ° C. for 2 minutes at a rotational speed of 16800 rpm. All mixed powders A were prepared.
(Preparation of unfired photocatalyst carrying board)
As shown in FIG. 20, an expanded metal E made of aluminum having a thickness of 1.55 mm and an area of 15 mm ² of one hole (manufactured by Kansai Tekko Co., Ltd., 4 mm expanded metal from the center) (distance between centers in the mesh short direction) × 8 mm ( The distance between the centers in the mesh long direction) × 0.8 mm (plate thickness) × 0.8 mm (step width)) is mixed with the above mixed powder A in the hole e of the expanded metal E as shown in FIG. Is filled so as to close. A rubber sponge sheet S having a thickness of 2 mm is stacked from above and below at least a portion e ′ filled with the mixed powder A in the expanded metal E, and further a rubber sheet G having a thickness of 1 mm is stacked on both the upper and lower sides. From the outside, pressing was performed at 50 kg / cm ² by a metal vertical pressing die P. In addition, the photocatalyst carrying board unbaked product produced using the mixed powder A is referred to as a board A. When board A produced here was immersed in a water tank, the water tank immediately became cloudy and titanium oxide particles flowed out.
(Production of photocatalyst carrying board)
Therefore, the board A is baked by performing a heat treatment for 10 minutes in an electric furnace heated to 370 ° C. slightly exceeding the melting point of PTFE, and the baked board A is a stainless steel having an outer method of 11 cm and an inner method of 10 cm square. The finished product of the photocatalyst carrying board L was obtained by being fitted so as to be sandwiched between the reinforcing frames F made of metal. This finished product is shown in FIGS. An inner groove f in which the board A can be held is formed on the inner side surface of the reinforcing frame F. Concave and convex f ′ that can be joined to another reinforcing frame body is formed on the outer side surface, so that it can be connected in a plane so as to spread tiles or can be assembled in a cubic shape. ing. A finished photocatalyst carrying board manufactured using the mixed powder A is referred to as a board AH. Even when this board AH was immersed in the water tank, the water tank did not become cloudy.

In addition, the flowchart of the manufacturing process of a present Example is shown in FIG.
(Example 2)
(Production of mixed powder)
80 g of anatase type titanium oxide powder (manufactured by Teika Co., Ltd., product number: AMT100, specification according to the company's catalog: crystal form; anatase, specific surface area: 260 m ² / g, average particle size: 6 nm) and 20 g of PTFE powder capable of fibrillation ( Daikin Kogyo Co., Ltd., product number; Fine Powder F104) was mixed with a mixer (SUNBEAM-OSTER, PHOENIXBLENDER-KB-1), and stirred at a constant temperature of 50 ° C. for 2 minutes at a rotational speed of 16800 rpm. All mixed powders B were prepared.
(Preparation of unfired photocatalyst carrying board)
Aluminum expanded metal with a thickness of 1.55 mm, an area of 15 mm ² for one opening (manufactured by Kansai Tekko Co., Ltd., 4 mm expanded metal distance from the center of the mesh) × 8 mm (center distance in the mesh long direction) ) × 0.8 mm (plate thickness) × 0.8 mm (step width)) so that the above-mentioned mixed powder B is filled so that the hole of the expanded metal is closed. A rubber sponge sheet having a thickness of 2 mm is stacked from above and below at least on the portion filled with the mixed powder B in expanded metal, and further a rubber sheet having a thickness of 1 mm is stacked on both the upper and lower sides. It pressure-molded at 50 kg / cm < ² > with the vertical and vertical press die. In addition, the photocatalyst carrying board unbaked product produced using the mixed powder B is referred to as a board B. When the board B produced here was immersed in a water tank, the water tank immediately became cloudy and titanium oxide particles flowed out.
(Production of photocatalyst carrying board)
Therefore, the board B is fired for 10 minutes in an electric furnace heated to 370 ° C. slightly exceeding the melting point of PTFE, and the fired board B is made of stainless steel with an outer method of 11 cm and an inner method of 10 cm square. The photocatalyst carrying board was completed by being fitted so as to be sandwiched between the reinforcing frame bodies. A groove in which the board B can be held is formed on the inner surface of the reinforcing frame. The outer surface is formed with irregularities that can be joined to other reinforcing frames, and can be connected in a planar manner so that tiles can be laid down, or can be assembled in a cubic shape in three dimensions. . A finished photocatalyst carrying board manufactured using the mixed powder B is referred to as a board BH. Even when this board BH was immersed in the water tank, the water tank did not become cloudy.
[Comparative Example 1]
In Example 1, 90 g of titanium oxide powder and 10 g of PTFE powder were mixed to produce a photocatalyst carrying board. In Comparative Example 1, the photocatalyst carrying board was produced by changing to 60 g of titanium oxide powder and 40 g of PTFE powder. Is.

That is, 60 g of titanium oxide powder (manufactured by Teika Co., Ltd., product number: AMT100, specification according to the company's catalog: crystal form; anatase, specific surface area: 260 m ² / g, average particle size: 6 nm) and 40 g of PTFE powder capable of fibrillation ( Daikin Industry Co., Ltd., product number; fine powder F104) is used to produce mixed powder C by the same production method as the mixed powder shown in Example 1. Using this mixed powder C, a photocatalyst-carrying board unfired product is produced by the same production method as the production of the photocatalyst-carrying board unfired product shown in Example 1, and this is referred to as board C. Then, using this board C, a photocatalyst carrying board is produced by a production method similar to the production of the photocatalyst carrying board shown in Example 1, and this is referred to as a board CH.
[Comparative Example 2]
In Example 1, 90 g of titanium oxide powder and 10 g of PTFE powder were mixed to produce a photocatalyst carrying board. However, in Comparative Example 2, the photocatalyst carrying board was produced by changing to 30 g of titanium oxide powder and 70 g of PTFE powder. Is.

That is, 30 g of titanium oxide powder (manufactured by Teika Co., Ltd., product number: AMT100, specification according to the catalog of the company: crystal form; anatase, specific surface area: 260 m ² / g, average particle size: 6 nm) and 70 g of PTFE powder capable of fibrillation ( Daikin Industry Co., Ltd., product number; fine powder F104) is used to produce mixed powder C by the same production method as the mixed powder shown in Example 1. Using this mixed powder C, a photocatalyst-carrying board unfired product is produced by the same production method as the production of the photocatalyst-carrying board unfired product shown in Example 1, and this is referred to as board D. Then, using this board D, a photocatalyst carrying board is produced by a production method similar to the production of the photocatalyst carrying board shown in Example 1, and this is referred to as a board DH.

  Table 1 shows the weights of the components of the mixed powder A and the mixed powder B prepared according to the above examples, and the mixed powder C and the mixed powder D prepared according to the comparative example.

[Comparison test]
The board AH and the board BH in the above embodiment, the board CH and the board DH in the comparative example are subjected to a test for measuring the time until ammonia is neutralized in air and water as follows, and the board in the embodiment AH and board BH neutralize ammonia in a short time, demonstrating that photocatalysis is significant.

As a reference for comparison, about 70 g of a commercially available photocatalytic ceramic ball (release source Otsuka Filtration Tank Laboratory, photocatalyst / special ceramic, trade name “Strica”, one sphere with a diameter of about 6.6 mm) is approximately 10 cm square. The same measurement was performed using a spread material. Furthermore, only ammonia was injected as a reference, and changes with time of ammonia were confirmed.
[Neutralization test of ammonia in air]
・ Test method Board AH, Board BH, Board CH and Board DH are each stored in a sealed container (11.5 cm square, height 3 cm) made of polypropylene and colorless and transparent, and litmus paper (manufactured by Advantech Toyo Co., Ltd .; width) 9mm) is cut into a substantially square shape and placed on the corner and center of each board. Then, using a pipette at each corner of each container, 0.05 ml of an aqueous solution of 28% concentration ammonia (the weight calibrated with an analytical balance was 0.047 g) was injected, and the time taken for the litmus paper to reach neutralization was measured.
Measurement environment Measurement started at 10:00 am in Osaka on a clear day in May, and ended 24 hours later. Measurements were taken under direct sunlight during the day, from about 6 pm after sunset to about 6 am after sunrise the next morning under fluorescent light.
-Confirmation method The value of PH is determined by comparing the color displayed on the litmus paper with the standard color specified by the litmus paper. In comparison with the standard color, an intermediate state, for example, when the color displayed on the litmus paper shows an intermediate color between PH7 and PH8, the larger numerical value, that is, PH8 was adopted. Furthermore, when it was judged as PH7, it confirmed that it was odorless.

Table 2 shows the measurement results of each board. The powder weight is the weight of each mixed powder used for forming each board. The ammonia neutralization rate coefficient is the rate at which ammonia reaches neutralization, and is the value obtained by dividing the number of ammonia molecules under a certain concentration by the product of both surface areas of the photocatalyst-carrying board and the time until neutralization. is there. The number of ammonia molecules in the neutralization test was 0.047 g (weight of aqueous ammonia) × 28% (concentration) ÷ 17 g (weight of ammonia per mole) × 6 × 10 ²³ (Avocado number) = 4.6. × 10 ²⁰ (2 significant digits). The ammonia neutralization rate coefficient is calculated by dividing the number of molecules by the product of both surface areas of 0.02 m ² of the photocatalyst carrying board and the time required for neutralization.

[Evaluation]
From the above test results, it was confirmed that the ammonia in the PH11 in the gas in the container containing the board AH reached neutralization in 1 hour from the start of the test, and the photocatalytic action of the board AH was remarkably exhibited. In addition, the gas in the container containing the board BH was neutralized in 5 hours, and it was confirmed that the photocatalytic action was sufficiently exhibited for the board BH. In contrast, the gas in the container containing the board CH finally reached neutralization in 24 hours, and it was confirmed that the photocatalytic action of the board CH was not sufficient. Further, it was confirmed that the gas in the container containing the board DH and the ceramic balls did not reach neutralization even after 24 hours, and the practicality as a photocatalyst was low. As a result, when the ammonia neutralization rate coefficient of the photocatalyst carrying board is 2.3 × 10 ²¹ pieces / m ² · hour or more, the photocatalyst exclusively for use in the atmosphere capable of exhibiting an extremely excellent photocatalytic effect. It is demonstrated that a supporting board can be obtained, and this can be achieved by setting the content of the photocatalyst particles in the mixed powder used for manufacturing the photocatalyst supporting board to 75% or more and the content of PTFE to 25% or less. In addition, it was confirmed that the pH of the gas in the container did not change even after the lapse of 24 hours, so that the test method was accurate and the measurement result was reliable.
[Neutralization test of ammonia in water]
Test method 200 ml of water is put in the same container as used in the above-mentioned “neutralization test of ammonia in air”, and 0.05 ml of an aqueous solution of 28% concentration of ammonia using a pipette (calibrated with an analytical balance). The weight is 0.047g), and each board contains board AH, board BH, board CH, and board DH, and a drop of water is taken from each container after a certain period of time. It was dripped and the change of PH was measured.
Measurement environment Measurement started at 10:00 am in Osaka on a clear day in May and ended after 48 hours. During the daytime, measurements were taken under fluorescent light outdoors from around 6 pm after sunset until 6 am after sunrise the next morning, avoiding direct sunlight.

The confirmation method is the same as the confirmation method in the “neutralization test of ammonia in air”.
Table 3 shows the measurement results. In addition, the powder weight used for formation of each board is the same as the powder weight in the above-mentioned “neutralization test of ammonia in air”. The ammonia neutralization rate coefficient is calculated by the method described in “Neutralization test of ammonia in air”.

[Evaluation]
From the above test results, it was confirmed that the ammonia in the PH11 of the liquid in the container containing the board AH reached neutralization in 5 hours from the start of the test, and the photocatalytic action of the board AH was remarkable. Further, the liquid in the container containing the board BH was neutralized in 24 hours, and it was confirmed that the board BH also has a sufficient photocatalytic action. In contrast, the liquid in the container containing the board CH finally reached neutralization in 48 hours, and it was confirmed that the photocatalytic action of the board CH was not sufficient. Further, it was confirmed that the air in the container containing the board DH and the ceramic balls did not reach neutralization even after 48 hours, and the practicality as a photocatalyst was low. As a result, when the ammonia neutralization rate coefficient of the photocatalyst-carrying board is 7.5 × 10 ²⁰ pieces / m ² · hour or more, the photocatalyst-carrying carrier dedicated to underwater that can exhibit an extremely excellent photocatalytic effect It is proved that a board can be obtained, and it can be achieved if the content of the photocatalyst particles in the mixed powder used for producing the photocatalyst carrying board is 75% or more and the content of PTFE is 25% or less. In addition, it was confirmed that the pH of the liquid in the container did not change even after the lapse of 24 hours, and that the test method was accurate and the measurement result was reliable.
[Experiment and effect using photocatalyst carrying board]
An experiment was performed using a combination of a photocatalyst carrying board and a black light according to an example of the present invention. The test subjects are a total of three subjects: a test subject A (an OL woman (acne, wipes, a woman who has a disease in the uterus), a test subject B (a healthy woman), and a test subject C (a woman with atopy throughout the body).

  For test subject A, when eight photocatalyst carrying boards were installed in a room between 6 tatami mats, not only could they sleep without stress, but the makeup paste improved, and acne and the like disappeared.

Regarding subject B who is not worried about health, when four photocatalyst carrying boards were installed in the bedroom, the impression that “may be good” was obtained.
As for subject C, when eight photocatalyst carrying boards were installed in one room between 6 tatami mats, sleep well and the makeup paste also improved. I also learned that atopy improved two weeks after the start of the test.

  As described above, the photocatalyst-carrying board according to the embodiment of the present invention is excellent not only in the conventional usage method such as deodorization and contamination but also in reducing stress, improving sleep and preventing diseases. Play. And the purification instrument which concerns on the Example of this invention provides the useful means for taking in such a photocatalyst carrying board to life.

The following factors are presumed as factors causing the above effects.
A large amount of active oxygen is generated in the body due to tobacco, electromagnetic waves, stress, food additives, factory smoke, exhaust gas, alcohol, and global warming (ultraviolet rays). Active oxygen oxidizes (rusts) the human body, which causes modern diseases such as cancer, atopy, and allergies. Furthermore, cigarettes, stress, and sick house gas are also present in ordinary rooms.

  The photocatalyst carrying board of the present embodiment removes the above-mentioned factors and enables respiration without stress. By staying indoors for a certain period of time by breathing without stress, the generation of active oxygen is suppressed and REM sleep, which is deep sleep, can be entered. Therefore, fatigue and stress can be quickly removed, and oxidation of the human body including skin and lungs can be prevented and improved.

  The photocatalyst carrying board according to the present invention and the purifying instrument that expropriates the photocatalyst carrying board are remarkable in deodorizing and purifying air and the like. Therefore, the industrial utility value is high.

FIG. 1 is an exploded perspective view of a purification device according to a first embodiment of the present invention. FIG. 2 is a perspective view of the purification device of FIG. 1 in an assembled state. FIG. 3 is a bottom view of the purification instrument of FIG. FIG. 4 is a plan view of the inside of the purification device for showing a mechanism for attaching the photocatalyst carrying board in the purification device according to the first embodiment. FIG. 5 is a plan view of the interior of the purification device showing a state in which the photocatalyst carrying board is attached to the interior of the purification device of FIG. FIG. 6 is a perspective view for explaining the operation of the mechanism for attaching the photocatalyst carrying board. FIG. 7 is a perspective view of a state in which a photocatalyst carrying board is attached to the inside of the purification instrument of FIG. FIG. 8 is a perspective view of the purification device when a wire mesh is attached to the side surface of the main body of the purification device of FIG. 1. FIG. 9 is a perspective view of the purification instrument when a wire mesh is attached to the bottom surface of the purification instrument of FIG. FIG. 10 is a perspective view of the purification device for showing a procedure when the purification device of FIG. 1 is attached to the ceiling wall. FIG. 11 is a perspective view of the purification instrument of FIG. 1 when attached to the ceiling wall. FIG. 12 is a side view of the purification device illustrating the flow of air inside the purification device of FIG. 1. FIG. 13 is a plan view showing the configuration of the metal mesh of the ventilation housing. FIG. 14 is a perspective view of a purification instrument according to the second embodiment of the present invention. FIG. 15 is a plan view of the main part of the lid used in the purification instrument of FIG. FIG. 16 is a perspective view of a purification device according to a third embodiment of the present invention. FIGS. 17A and 17B are views of an acrylic bar member used in the purification instrument of FIG. 16, wherein FIG. 17A is a perspective view of the bar member, and FIG. 17B is a diagram for explaining the operation of the bar member. FIG. 18 is a schematic view when an illuminating means is provided inside the purifying apparatus according to each embodiment of the present invention. FIG. 19 is a perspective view showing another example of the photocatalyst carrying board arranged inside the purification instrument according to each embodiment of the present invention. FIG. 20 is a perspective view with a partially enlarged view of the expanded metal used for producing the photocatalyst carrying board according to the first embodiment. It is a schematic sectional drawing which shows the state which piled up the rubber sponge sheet and the rubber sheet on the expanded metal with which mixed powder was filled, and was pressure-molded with the metal up-down pressurization die. FIG. 4 is a partially cutaway perspective view with a partially enlarged view of a finished product of the photocatalyst carrying board according to the first embodiment. It is sectional drawing of the completed product of the board at the time of carrying | supporting the photocatalyst concerning Example 1. FIG. 3 is a flowchart showing manufacturing steps of the photocatalyst carrying board according to the first embodiment. FIG. 25 is a perspective view of the purifying instrument according to the embodiment of the present invention, showing another arrangement example of the photocatalyst carrying board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Purification instrument which concerns on 1st Example 1b Purification instrument which concerns on 2nd Example 1c Purification instrument which concerns on 3rd Example 2 Main-body part 3 Ventilation cover part 4 Attachment lid part 5a, 5b, 5c Ventilation housing surface 6 Ventilation housing surface at the bottom 7a, 7b, 7c Pillar portion 8 Through hole 9 First ring portion 10 Screw portion 11 Screw portion 12 Second ring portion 13 Screw portion 20 (20a, 20b, 20c) Board mounting mechanism
21a, 21b Columnar block 22 Connecting portion 23a, 23b Slit 24 Bottom edge plane 30 (30a, 30b, 30c) Photocatalyst carrying board 31a Wire net 32 Wire net 33 Wood screw 34 Ceiling 35 Wire net having a light collecting function 36 Light collecting portion 37 Opening portion 40 Lid part 42 Disc 44 Top plate part 60 (60a, 60b, 60c) Photocatalyst carrying board 50 Main body part 51 Columnar member 55 Illuminating means 55 'Blacklight 56 Power supply 57 Wire A ... Mixed powder E ... Expanded metal e ... ..Hole e '.. portion S filled with mixed powder S ... rubber sponge sheet G ... rubber sheet P ... metal vertical pressing die F ... reinforcing frame f ...・ Reinforcing frame inner groove f ′ ・ Connectable unevenness L ・ ・ ・ Photocatalyst carrying board

Claims (31)

A purifying device for purifying air,
A housing having at least one vent housing surface formed with a plurality of vents and a cavity defined by the vent housing surface;
A plurality of photocatalyst carrying boards, each of the photocatalyst carrying boards has a photocatalytic function, and air that has entered the cavity from the vent flows along both sides of the photocatalyst carrying board. The plurality of photocatalyst carrying boards disposed in the cavity to enable
A purification device comprising:   The said housing has a top part, a main-body part, and a bottom part, The purification instrument of Claim 1 with which at least one part of the surface of this main-body part and this bottom part is comprised as the said ventilation | gas_flowing housing surface.   The purification instrument according to claim 2, wherein at least three of the photocatalyst carrying boards are arranged so as to respectively form side surfaces of a polygonal column.   The purification instrument according to claim 3, wherein three photocatalyst carrying boards are prepared, and the polygonal prism is a regular triangular prism.   The purification instrument according to any one of claims 2 to 4, wherein the photocatalyst carrying board is disposed such that at least one surface of the photocatalyst carrying board faces a ventilation housing surface of the main body.   The said photocatalyst carrying board is a purification instrument of Claim 5 arrange | positioned so that this photocatalyst carrying board may become substantially perpendicular | vertical with respect to the ventilation | gas_flowing housing surface of the said bottom part.   The purification apparatus according to any one of claims 1 to 6, wherein the ventilation housing surface is configured by using a net-like member.   The purification tool according to claim 7, wherein the mesh member has a convex lens and a vent formed in a mesh portion.   The purification instrument according to any one of claims 2 to 6, wherein at least the ventilation housing surface of the main body is configured using a lattice.   The purifier according to claim 9, wherein the lattice is composed of a plurality of transparent columnar members.   The purification | cleaning instrument of Claim 10 with which the said columnar member is convexly formed in the outer side direction of the said housing.   The purification instrument according to any one of claims 2 to 11, wherein at least one of the top and the bottom is configured as a detachable lid for closing the opening of the main body.   The said main-body part is a purification instrument of Claim 12 provided with the board attachment means for hold | maintaining the said photocatalyst carrying | support board so that sliding is possible.   The purification instrument according to claim 13, wherein when the lid is removed, the photocatalyst carrying board can be taken out from the opening of the main body by sliding along the board attaching means. .   The purification device according to any one of claims 12 to 14, wherein the lid portion includes attachment means for attaching the lid portion to a wall surface.   The lid portion includes a top plate portion that is detachable from the main body portion, a support column portion that extends from a central portion of the top plate portion, and a mounting disk that is attached to the upper end portion of the support column portion. 16. A purification instrument according to claim 15, wherein the mounting disk comprises the mounting means.   The purification device according to claim 15 or 16, wherein the attachment means is a through hole for allowing a screw that can be screwed into the wall surface, or an adhesive means.   The purifying instrument according to claim 16, wherein a ventilation hole is formed in the top plate portion.   The purification instrument according to any one of claims 1 to 18, further comprising a light emitting means in the cavity.   The purification device according to claim 19, wherein the light emitting means is arranged to irradiate light to a surface of the photocatalyst carrying board that does not face the ventilation housing surface.   The purification instrument according to claim 3 or 4, comprising a light emitting means inside the polygonal column.   The purification instrument according to any one of claims 19 to 21, wherein a solar cell panel is used as a power source of the light emitting means.   The purification instrument according to any one of claims 1 to 22, wherein the photocatalyst carrying board is formed in a wave shape.   The purification tool according to any one of claims 15 to 18, wherein the top portion is configured as the lid portion and is attached to an indoor ceiling using the attachment means. A purifying device for purifying air,
A housing having at least one vent housing surface formed with a plurality of vents and a cavity defined by the vent housing surface;
The housing makes it possible to accommodate a plurality of photocatalyst carrying boards, and each of the photocatalyst carrying boards has a photocatalytic function on both sides, and when accommodated in the housing, A purification device disposed in the cavity to allow incoming air to flow along both sides of the photocatalyst carrying board.   The housing includes a top portion, a main body portion, and a bottom portion, at least a part of the surface of the main body portion and the bottom portion is configured as the ventilation housing surface, and at least three of the photocatalyst carrying boards are polygonal columns. 26. The purification device according to claim 25, wherein the photocatalyst carrying board can be arranged so as to form each of the side surfaces.   27. A purification instrument according to claim 25 or 26, wherein the vent housing surface further has a light collecting function.   27. The purification instrument according to claim 26, wherein at least one of the top and the bottom is configured as a removable lid for closing the opening of the main body.   29. The purification instrument according to claim 28, wherein the main body portion includes board attachment means for slidably holding the photocatalyst carrying board.   30. The purification device according to claim 28 or 29, wherein the lid portion has attachment means for attaching the lid portion to a wall surface.   The purification instrument according to any one of claims 25 to 30, further comprising a light emitting means in the cavity.

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