JP4806108B2 - Deodorizing device - Google Patents

Description

  The present invention relates to a deodorizing device. More specifically, the present invention relates to an air purification filter comprising a zeolite adsorbent, a photocatalyst, and an air permeable base material, and an air purification device using the filter, particularly acetaldehyde, acetic acid, ammonia. This is a technology related to devices that are operated by electric power, and devices such as filters for decomposing and removing malodorous components such as hydrogen sulfide and deodorizing.

  Broadly speaking, two methods have been studied as air quality purification methods for purifying malodors contained in the atmosphere and gaseous components that are toxic to the human body. One is a method of purifying air by sending air (gas) mixed with bad odor or toxic gas into an adsorbent such as activated carbon or zeolite with a blower, etc., concentrating and storing only bad odor or toxic gas in the adsorbent. The other is a method in which malodorous or toxic gas is decomposed with a catalyst, heater, plasma, etc., converted to odorless and nontoxic gas, and returned to the air.

  Conventionally, air purification devices such as air purifiers and deodorizers used at home have used a method of concentrating, storing and deodorizing odors using a filter loaded with an adsorbent such as activated carbon (patented) References 1, 2 and 3). In the case of this method, with the time for purifying the air quality, odor accumulates in the adsorbent, and the deodorizing ability of the adsorbent decreases. For this reason, in order to restore and maintain the deodorizing ability, it was necessary to replace or regenerate the adsorbent filter. Further, in this conventional method using an adsorbent, since adsorption / desorption equilibrium exists, it is difficult to reduce the odor to a low concentration. As a method for regenerating the filter, a method for decomposing the adsorbed odorant with a photocatalyst has been proposed, and as a method for deodorizing to a low concentration, a method for decomposing and deodorizing with a photocatalyst has been proposed. However, the conventional photocatalyst has a low decomposition ability, and it has not been possible to completely regenerate the filter within a certain period of time or to perform decomposition and deodorization superior to adsorption.

  In view of the above, a highly active photocatalytic material that can regenerate the filter and can decompose and deodorize to a low concentration has been desired. Titanium oxide photocatalysts have been put to practical use in various situations for the purpose of sterilization and antifouling. In recent years, their use is not limited to outdoor use, but is also being applied to indoor sterilization and deodorization. Therefore, although highly active titanium oxide is being developed, it has been difficult to regenerate the filter and to instantly decompose the odor.

  On the other hand, in deodorizing and purifying devices using photocatalysts, deodorizing devices (modules) that can recycle and reuse deodorizing agents (zeolites) and that can decompose and deodorize odors at high speed have been developed. As a result, the device had to be a large area and large volume device. This is because the filter element is a mixture of adsorbent (zeolite) and photocatalyst, and has a structure that accommodates a capacity of a certain area (amount) or more for high-speed deodorization, and a sufficient light source for odorous substance decomposition and filter regeneration. This is because a structure for disposing the structure is necessary. Moreover, a device structure with a small pressure loss was required as a filter.

  In a deodorization and air purification device using a photocatalyst, the volume of the device module becomes too large and installation is inconvenient, and it is said that downsizing of the device is essential. From such a point, for example, a catalyst module (Patent Document 4) in which reaction plates are arranged in a blind form, a deodorizing device (Patent Document 5) in which a plurality of plate-like deodorizing bodies are arranged in parallel to the ventilation direction, and the like. Has been proposed.

JP-A-1-218635 JP 2002-136811 A JP 11-319570 A Japanese Patent No. 2777623 Japanese Patent Laid-Open No. 10-286436

  However, it cannot be said that the above-mentioned conventional deodorizing apparatus is sufficient in both decomposition ability and regeneration ability, and a proposal for a small device structure with further excellent deodorization ability and filter regeneration ability is desired. Therefore, in view of the above problems, the present invention provides a deodorizing device that is excellent in deodorizing ability and filter regeneration ability, and preferably capable of being downsized.

  The present invention is a deodorizing device comprising a plurality of single filter elements, a plurality of light sources for irradiating ultraviolet rays, and a support, wherein the single filter element is a porous substrate and a photocatalyst supported on the substrate And the plurality of single filter elements and the plurality of light sources are integrated by the support to form a module structure, and the single filter element is formed with respect to the longitudinal direction of the light source. The present invention relates to a deodorizing device in which the longitudinal axes of the filter body are substantially orthogonal and arranged substantially parallel to each other while maintaining an elevation angle (θ), and the elevation angle (θ) is greater than 0 ° and less than 45 °.

  In another aspect, the present invention provides a deodorizing device including a honeycomb structure filter, a light source that emits ultraviolet rays, and a support, wherein the honeycomb structure filter is supported on the honeycomb structure substrate and the substrate. The deodorizing device has a module structure in which the single filter body and the light source are integrated with the support, and the filter has a longitudinal axis of a cell of the filter and the light source. It is related with the deodorizing device arrange | positioned with the angle | corner ((theta ')) made | formed with the axis | shaft orthogonal to the longitudinal direction of more than 0 degree and less than 45 degrees being arrange | positioned.

  According to the deodorizing device of the present invention, the deodorizing ability and the filter regeneration ability can be improved. In addition, according to the deodorizing device of the present invention, preferably, the device size can be reduced while maintaining the improved deodorizing ability and filter regeneration ability.

FIG. 1 is a schematic diagram of a typical air purification device. FIG. 2 is a schematic view of an example of a single filter element used in the deodorizing device of the present invention. 3A and 3B are schematic views of an example of the deodorizing device of the present invention. 4A and 4B are schematic views of other examples of the deodorizing device of the present invention. 5A and 5B are schematic views of still another example of the deodorizing device of the present invention. 6A and 6B are schematic views of still another example of the deodorizing device of the present invention. 7A and 7B are schematic views of still another example of the deodorizing device of the present invention. FIG. 8 is a schematic view of a pleated filter module of Comparative Example A.

[Deodorization ability]
In the present specification, “deodorization” refers to adsorption and / or decomposition of odor components and organic substances in the gas phase. Preferably, the concentration of odorous components and organic substances in the gas phase is reduced. More preferably, the odorous components and organic substances in the gas phase are adsorbed by the adsorption action of the adsorbent, and the titanium oxide photocatalyst is irradiated with ultraviolet light. Is used to decompose odor components and the like to reduce the concentration of odor components and organic substances. Examples of the odor component include acetaldehyde, acetic acid, ammonia, sulfur compound gas (hydrogen sulfide, methyl mercaptan, etc.), etc. Among them, the deodorizing device of the present invention is suitable for deodorizing acetaldehyde. In the present specification, the “deodorizing ability” refers to an ability to adsorb and / or decompose the odor component per unit time, and can be evaluated by, for example, an aldehyde deodorizing rate. The deodorization rate can be calculated by, for example, the method described in the examples.

[Filter regeneration ability]
As used herein, “filter regeneration ability” refers to the ability to recover the filter's deodorizing ability by irradiation with ultraviolet rays. The filter regeneration capability can be evaluated by, for example, the Japan Electrical Manufacturers' Association standard (JEM1467) or the method described in the examples. If the recovery rate calculated based on the change in the deodorization rate before and after irradiating the filter with 1.0 mW / cm ² ultraviolet rays for 2 hours based on the example is 94% or more, it has sufficient filter regeneration ability. be able to. Further, it can be said that if the recovery rate is 95% or more, it has excellent filter regeneration ability, and if it is 98% or more, it can be said that it has extremely excellent filter regeneration ability. Furthermore, if it is a deodorizing device provided with a filter with a recovery rate of 95% or more, for example, it is not necessary to replace the filter for about 10 years, and an effect that a maintenance-free and economical deodorizing device can be provided can be achieved.

  According to the present invention, the single filter element body has a longitudinal axis substantially perpendicular to the longitudinal direction of the light source, and an elevation angle of more than 0 ° and less than 45 °, preferably more than 0 ° and more than 10 °. If it arrange | positions substantially parallel keeping the following elevation angles, it will be based on the knowledge that the deodorizing device which is excellent in a deodorizing capability and filter regeneration capability can be provided.

  In recent years, in air purification devices such as air purifiers and deodorizers, it is possible to reduce odor components to a lower concentration compared to maintenance-free air purification devices that do not require filter maintenance and conventional adsorption methods using activated carbon. An air purification device is desired. More specifically, the deodorizing device having a filter durability of about 10 years, that is, when calculated based on the Japan Electrical Manufacturers' Association Standard (JEM1467), deterioration of the filter deodorizing rate even when used for about 10 years. Therefore, there is a demand for a deodorizing device that can sufficiently suppress deodorization, can regenerate the adsorbent by irradiation with light for about 2 hours a day, and can be strongly deodorized. There is also a demand for a portable device having a compact size, for example, a deodorizing device with a capacity of 10 L or less.

  That is, the present invention is a deodorizing device comprising a plurality of single filter bodies, a plurality of light sources for irradiating ultraviolet rays, and a support, wherein the single filter body is carried on a porous substrate and the substrate. The plurality of single filter elements and the plurality of light sources are integrated with the support to form a module structure, and the single filter elements are arranged in the longitudinal direction of the light source. The present invention relates to a deodorizing device in which the longitudinal axis of the single filter element body is substantially orthogonal and arranged substantially in parallel while maintaining an elevation angle (θ), and the elevation angle (θ) is greater than 0 ° and less than 45 °. Further, in a preferred aspect of the deodorizing device of the present invention, the plurality of light sources pass through substantially the center in the short direction of the plurality of single filter bodies, or are sandwiched between the plurality of single filter bodies. It is preferable to arrange | position.

  As a preferred embodiment of the deodorizing device of the present invention, the plurality of light sources are arranged so as to sandwich the plurality of single filter bodies, and the distance between the light source and the single filter body is less than 15 mm, The distance between the light sources is 120 mm or less, and the distance between the single filter elements is 2 asin θ or less (a: length of the short side of the single filter element (mm), θ: elevation angle of the single filter element (°)). is there.

  In another aspect, the present invention provides a deodorization device including a honeycomb structure filter, a light source that irradiates ultraviolet rays, and a support, wherein the honeycomb structure filter is supported on the honeycomb structure substrate and the substrate. The deodorizing device includes a module structure in which the single filter element and the light source are integrated with the support, and the filter includes a longitudinal axis of the filter cell and a longitudinal direction of the light source. The present invention relates to a deodorizing device arranged with an angle (θ ′) formed with an axis perpendicular to the direction being kept between 0 ° and less than 45 °.

  According to the deodorizing device of the present invention, the deodorizing ability and the filter regeneration ability can be improved. In particular, according to the deodorizing device of the above preferred embodiment and the deodorizing device of other embodiments, for example, the device size (capacity) is 10 L or less, the light source (UV lamp) power consumption is 40 W, and the deodorization rate is 85 when the aldehyde concentration is 1 ppm. % / H or more, and a deodorizing device having a filter recovery rate of 94% or more, preferably 95% or more can be realized. With this deodorizing device, it is small enough to be easily carried and is an air purifier or deodorizing device that is maintenance-free and capable of powerful deodorization with no deterioration of the deodorizing speed without care (replacement) of the filter for about 10 years. An air quality purification apparatus such as a machine can be provided. In addition, it is possible to provide an air purification device that can deodorize odor components to a low concentration as compared with a conventional activated carbon adsorption-type air purification device. In the present specification, the “device size” is the size of a device including a light source, a filter including a photocatalyst, and a support that supports them, and preferably a filter including a light source and a photocatalyst, and a support that supports these. That is, the capacity of a device that does not include a fan or the like.

  In this specification, the “elevation angle (θ)” is an angle (°) at which the single filter element is inclined with respect to a plane orthogonal to the longitudinal axis of the light source, and more specifically, the longitudinal axis of the light source. Means the angle (°) between the plane orthogonal to the main surface of the single filter element body. In the deodorizing device of the present invention, the elevation angle is more than 0 ° and less than 45 °, and from the viewpoint of deodorizing ability, it is preferably more than 0 ° and less than 30 °, more preferably more than 0 ° and less than 10 °. From the point of reproduction capability, 3 ° or more and less than 30 ° is preferable, and 3 ° or more and less than 10 ° is more preferable.

  In this specification, “arranged substantially parallel while maintaining an elevation angle (θ)” means that each single filter element body is maintained at an elevation angle with the end faces on the light source side of each single filter element body located on substantially the same plane. Preferably, each single filter element body is arranged at an elevation angle with the end face positioned on a plane parallel to the longitudinal axis of the light source. From the viewpoint of capability, the end faces of the single filter element bodies adjacent to each other should be positioned on a plane parallel to the longitudinal axis of the light source in a state where the main surfaces of the single filter element bodies are parallel and maintain an elevation angle. More preferred.

  In this specification, the “single filter element” is a filter including a porous substrate, a photocatalyst and zeolite supported on the substrate, and preferably cut out to a predetermined size from the filter sheet. Say.

  In this specification, “a plurality of single filter elements and a plurality of light sources are integrated with a support to form a module structure” means that a plurality of single filter elements and a plurality of light sources are supported by a support. Forming one module structure. As the support, for example, a housing capable of supporting at least a plurality of single filter bodies and a plurality of light sources is preferable. Examples of the material of the support (housing) include metal materials such as aluminum and stainless steel, and resins. Further, in the case of a resin, it may be protected with thin aluminum so as to suppress deterioration due to UV.

  In this specification, “photocatalyst” refers to a substance that exhibits catalytic activity by irradiating with light such as ultraviolet rays. Specifically, by irradiating with light, various organic and inorganic substances are decomposed and removed. Can be sterilized, such as decomposition and removal of malodorous components such as acetaldehyde and mercaptans, sterilization and removal of fungi and algae, oxidative decomposition and removal of nitrogen oxides, and antifouling by making glass superhydrophilic Or a member. In addition, the photocatalytic activity in the present invention refers to the production rate of carbon dioxide generated as a result of irradiating ultraviolet rays of 400 nm or less in the state where a gaseous or liquid organic substance and the photocatalyst coexist, and oxidizing the organic substance. .

  In the present invention, the superiority or inferiority of the photocatalytic activity is described with the production rate of carbon dioxide generated by oxidative decomposition of acetaldehyde. Reaction formula (1) at that time is shown below.

Reaction formula (1)
CH ₃ CHO + 0.5O ₂ → CH ₃ COOH + 2O ₂ → 2CO ₂ + 2H ₂ O

As the photocatalyst material, titanium oxide (anatase type) is generally used as an excellent photocatalyst material from the viewpoint of the stability of the substance and the ease of supply. The activity can be improved by modifying the titanium oxide itself, increasing the crystallinity, or increasing the specific surface area. In the present invention, for example, it is preferable to design a device using a photocatalyst having a particularly high activity, and it is more preferable to use a photocatalytic performance having an acetaldehyde decomposing ability of about 5 μmol / cm ² · h or more.

  As the photocatalyst, for example, titanium oxide can be used, and from the viewpoint of photocatalytic activity and deodorizing ability, titanium oxide containing fluorine is preferable. Examples of titanium oxide include anatase type titanium oxide, rutile type titanium oxide, and brookite type titanium oxide. Among these, anatase-type titanium oxide is preferable because it has high photocatalytic activity. In this specification, “anatase-type titanium oxide” refers to titanium oxide in which a diffraction peak appears at a diffraction angle of 2θ = 25.5 ° in powder X-ray diffraction spectrum measurement (electrode used: copper electrode). Moreover, in the titanium oxide containing fluorine, the fluorine content is preferably in the range of 2.5 to 3.5% by weight, more preferably 2.7 to 3.3% by weight, with respect to the amount of titanium oxide. It is. The titanium oxide containing fluorine preferably has a ratio A / B of 0.01 or less, more preferably, when the sodium content is A wt% and the fluorine content is B wt%. 0.005 or less, more preferably 0.001 or less. As titanium oxide containing fluorine, for example, a titanium oxide photocatalyst described in International Publication No. 2008/132824 can be used. The fluorine content and the sodium content can be measured, for example, based on the method described in International Publication No. 2008/132824.

  Zeolite basically has silica and alumina bonded through oxygen, and typical crystal types thereof are A type, X type, beta type, ferrilite type, mordenite type, L type and Y type. and so on. It is possible to synthesize a wide variety of zeolites having different pore diameters and shapes by changing the silica alumina ratio and the firing temperature. Some manufacturers supply it as a mixture. The particle diameter of the zeolite is usually in the range of 1 to 20 μm, and the pore diameter is usually in the range of 1 to 10 mm.

  An example of zeolite is shown in Table 1 below.

  The role of zeolite has the role of concentrating the odor by bringing the odor component as close as possible to the decompositionally active titanium oxide. Therefore, as the adsorbent itself, a material that can most adsorb odor is selected. In particular, among odors, an adsorbent is selected that can adsorb acetaldehyde, which is poor in adsorption ability with conventional activated carbon, and that can favorably adsorb acetaldehyde, which is a component included in the most various malodorous components in the odor. The zeolite is basically a high silica alumina having a high acetaldehyde adsorptive power, and a mordenite (trade name: ZSM5) type zeolite having a crystal structure with a pore diameter of about 5 mm is preferable.

From the point of showing higher decomposition performance, it is preferable to mix the photocatalyst and zeolite and carry them on the filter. More preferably, titanium oxide modified with fluorine is used for titanium oxide, and ZSM5 (trade name: HSZ-890HOA) is used for zeolite, which are about 2 to 1 (titanium oxide: zeolite (weight ratio)). It is to use the photocatalyst member mixed in the ratio. Thereby, it is possible to form an adsorbent having high decomposition performance and regeneration ability. With these photocatalytic members, higher photocatalytic decomposition ability of acetaldehyde can be exhibited. Further, by mixing titanium oxide and zeolite, acetaldehyde, which is an odor component, can be sucked and concentrated to improve the association reactivity with titanium oxide. In the present invention, the decomposition rate of acetaldehyde in the case of a photocatalytic member in which the above titanium oxide containing fluorine and ZSM5 (trade name: HSZ-890HOA) are mixed at a ratio of about 2 to 1 (titanium oxide: zeolite (weight ratio)). However, for example, it is confirmed that it is about 10 μmol / cm ² · h.

  Next, description will be given of a single filter element body using the photocatalyst member of the present invention.

  A single-filter element body can be produced by forming a photocatalyst member in which titanium oxide and zeolite are mixed into a film by, for example, applying and bonding to a woven fabric made of glass fiber. The element body can be formed by dispersing the photocatalyst member obtained by mixing with water or ethyl alcohol to form a woven fabric made of glass fibers. From the viewpoint of more firmly fixing the photocatalyst member, it is preferable to use an inorganic binder. Inorganic binders generally include tetraethoxysilane (TEOS) and colloidal silica.

  As a film forming method, slurry coating, spin coating, spray coating, casting coating, or the like can be used. It is possible to produce from a film thickness corresponding to the zeolite particle diameter to a thickness of several mm. The element body does not particularly define the film thickness, but is preferably about 100 to 500 μm where light reaches. Since the photocatalytic decomposition reaction is a surface reaction, it is almost proportional to the area reached by UV light.

  The photocatalyst member is dispersed with water or ethyl alcohol, deposited on a glass substrate, dried and formed into a film (film thickness of about 100 μm). This film was irradiated with black light having a wavelength of 365 nm to decompose acetaldehyde. When the decomposition rate was examined, it was confirmed that a decomposition rate 3 to 6 times that of a conventional titanium oxide photocatalyst (trade name: SSP-25, manufactured by Sakai Chemical Industry) per unit area and time was obtained.

As a base material in the single filter body used in the deodorizing device of the present invention, a porous filter base material or a gas permeable filter base material for the purpose of gas deodorization can be used. As a base material, a nonwoven fabric, glass fiber, a foam metal, porous ceramics, a foamed resin etc. are mentioned, for example. Examples of the material of the base material include inorganic materials. The single filter element can be produced, for example, by using an inorganic binder and immobilizing the photocatalyst mixture on a substrate. It is preferable to use a woven fabric made of glass fiber in view of stability of fixing the member, transparency to UV light, and availability. Furthermore, as a device for performing decomposition and deodorization, a 365 nm UV light source can be provided so that the filter can be uniformly irradiated and used as a deodorization filter. The UV intensity, per unit area of a single filter element body (cm ²⁾ ultraviolet rays irradiated per (average UV intensity) is sufficiently Some 1 mW / cm ^2, more preferably at 1~5mW / cm ² . Moreover, even if the average ultraviolet intensity per unit area (cm ² ) of the single filter element is 0.1 mW / cm ² , the deodorizing component can be sufficiently decomposed. It is possible to use a black light fluorescent lamp as the UV light source, or to use a cold cathode tube type.

  The present invention will be specifically described below.

(Embodiment 1)
FIG. 4 is a schematic diagram illustrating the deodorizing device according to Embodiment 1 of the present invention, FIG. 4A is a perspective view, and FIG. 4B is a cross-sectional view.

  As shown in FIGS. 4A and 4B, the deodorizing device includes a plurality of light sources 22, a plurality of single filter bodies 24, and a support body 21 that supports the light sources 22 and the single filter bodies 24. All the single filter elements 24 are arranged on the support 21 while maintaining the elevation angle θ, and the main surfaces of the adjacent single filter elements 24 are substantially parallel to each other. All of the light sources 22 are disposed so as to penetrate substantially the center in the short direction of the single filter element body 24.

  It is preferable that the adjacent single filter element bodies 24 are arranged at a predetermined interval. When the length of the short side of the single filter element 24 is a (mm), the interval between the single filter elements 24 is preferably 2 asin θ or less, more preferably 1/2 asin θ or more and 2 asin θ, and the point of deodorizing ability. Even more preferably, it is approximately asin θ. The “interval between single filter elements” is the shortest distance between adjacent single filter elements 24 in the longitudinal direction of the light source 22. The “interval between the single filter elements” is preferably the shortest distance between the end faces (long sides) on the light source 22 side in the adjacent single filter elements 24, for example, M in FIG. 4B.

  When the length of the short side of the single filter element 24 is a (mm) and the length of the long side of the single filter element 24 is b (mm), the ratio (b / It is preferable that a) is 2 or more. An example of the single filter element is shown in FIG. In the single filter element body 4 of FIG. 2, the X-axis side is the long side (b), and the Y-axis side is the short side (a).

  Although the space | interval of the light source 22 can be suitably determined according to the light quantity etc. of the light source 22 to be used, for example, 120 mm or less is preferable, More preferably, it is 100 mm or less. The “interval of the light source” is the shortest distance between the centers of the light sources 22 adjacent to each other in the longitudinal direction of the single filter element body 24, for example, N in FIG. 4A.

  In addition, although this embodiment illustrated and demonstrated the form which the light source 22 penetrates the several single filter element | base_body 24, this invention is not limited to this. For example, the light source may be sandwiched between single filter elements disposed so as to serve as a reference around the longitudinal direction of the light source.

(Embodiment 2)
FIG. 5 is a schematic view showing a deodorizing device according to Embodiment 2 of the present invention, FIG. 5A is a perspective view, and FIG. 5B is a cross-sectional view.

  As shown in FIGS. 5A and 5B, the deodorizing device includes a plurality of light sources 32, a plurality of single filter bodies 34, and a support body 31 that supports the light sources 32 and the single filter bodies 34. All of the single filter elements 34 are arranged on the support line symmetrically around the longitudinal direction of the light source 32 while maintaining the elevation angle θ, and the main surfaces of the adjacent single filter elements 34 are substantially parallel to each other. That is, as shown in FIG. 5B, when viewed from the short side of the single filter element 34, the single filter element 34 is arranged in an inverted V shape. All of the light sources 32 are arranged so as to penetrate substantially the center in the short direction of the single filter element 34.

  In the second embodiment, the interval between the single filter elements 34, the ratio (b / a) of the long side length to the short side length of the single filter element 34, and the interval between the light sources 32 are the same as those in the first embodiment. It is.

(Embodiment 3)
FIG. 3 is a schematic view showing a deodorizing device according to Embodiment 3 of the present invention, FIG. 3A is a perspective view, and FIG. 3B is a cross-sectional view.

  As shown in FIGS. 3A and 3B, the deodorizing device includes a plurality of light sources 12, a plurality of single filter bodies 14, and a support 11 that supports the light sources 12 and the single filter bodies 14. All the single filter elements 14 are arranged on the support 11 while maintaining the elevation angle θ, and the main surfaces of the adjacent single filter elements 14 are substantially parallel to each other. The light source 12 is disposed on the end face side in the longitudinal direction of the single filter element body 14 so as to sandwich the single filter element body.

  The interval between the single filter elements 14 is preferably 2 as sin θ when the length of the short side of the single filter element 14 is a (mm). From the viewpoint of deodorizing ability and filter regenerating ability, it is 1/2 or more sin θ. 2 asin θ or less is more preferable, and approximately asin θ is even more preferable.

  The distance between the light source 12 and the single filter element 14 can be appropriately determined according to the amount of light of the light source 12, etc., but is preferably less than 15 mm, more preferably less than 10 mm from the viewpoint of deodorizing ability and filter regeneration ability. It is preferable that the light source 12 and the single filter element body 14 are disposed so as to be in contact with each other. The “distance between the light source and the single filter element body” refers to the shortest distance between the end face of the light source 12 and the end face in the longitudinal direction of the single filter element body 14, for example, L in FIG. 3B.

  Although the space | interval of the light source 12 in the longitudinal direction of a single filter element | base_body can be suitably determined according to the light quantity etc. of the light source 12 to be used, 120 mm or less is preferable, for example, More preferably, it is 100 mm or less.

(Embodiment 4)
6 is a schematic view showing a deodorizing device according to Embodiment 4 of the present invention, FIG. 6A is a perspective view, and FIG. 6B is a cross-sectional view.

  6A and 6B, the deodorizing device includes a plurality of light sources 42, a honeycomb structure filter 5, and a support that supports the light sources 42 and the honeycomb structure filter 5. The light sources 42 are arranged on both sides of the main surface of the honeycomb structure filter 5 so as to sandwich the main surface of the honeycomb structure filter 5. The honeycomb structure filter 5 is arranged so that its main surface and the longitudinal direction of the light source 42 are substantially parallel. The honeycomb structure filter 5 is a filter having a box-like inclined honeycomb structure, and the internal structure thereof is an angle (θ ′) formed by the longitudinal axis of the filter cell and the axis orthogonal to the longitudinal direction of the light source 42. Is structured to hold more than 0 ° and less than 45 °. The formed angle (θ ′) is preferably more than 0 ° and less than 30 ° from the viewpoint of deodorizing ability, more preferably more than 0 ° and less than 10 °, and more than 3 ° and 30 from the viewpoint of filter regeneration ability. It is preferably less than 0 °, more preferably 3 ° or more and less than 10 °.

  The distance between the light source 42 and the honeycomb structure filter 5 can be appropriately determined according to the light amount of the light source, etc., but is preferably less than 15 mm, more preferably less than 10 mm in terms of deodorizing ability and filter regeneration ability. The light source 42 and the honeycomb structure filter 5 are preferably disposed so as to be in contact with each other. The “distance between the light source and the honeycomb structure filter” refers to the shortest distance between the light source 42 and the main surface of the honeycomb structure filter 5, for example, L in FIG. 6B.

  Although the space | interval of the light source 42 in the longitudinal direction of a single filter element | base_body can be suitably determined according to the light quantity etc. of the light source to be used, 120 mm or less is preferable, for example, More preferably, it is 100 mm or less.

  In the present embodiment, an example in which the light source 42 is disposed so as to sandwich the honeycomb structure filter 5 is illustrated, but the present invention is not limited to this. For example, the light source may have a form penetrating a honeycomb structure filter.

(Embodiment 5)
7 is a schematic view showing a deodorizing device according to Embodiment 5 of the present invention, FIG. 7A is a perspective view, and FIG. 7B is a cross-sectional view.

  6A and 6B, the deodorizing device includes a plurality of light sources 52, a honeycomb structure filter 6, and a support that supports the light sources 52 and the honeycomb structure filter 6. The light sources 52 are arranged on both sides of the main surface of the honeycomb structure filter 6 so as to sandwich the main surface of the honeycomb structure filter 6. The honeycomb structure filter 6 is disposed so that an angle (θ ′) between the main surface and the longitudinal direction of the light source 52 is more than 0 ° and less than 45 °. The formed angle (θ ′) is preferably more than 0 ° and less than 30 ° from the viewpoint of deodorizing ability, more preferably more than 0 ° and less than 10 °, and more than 3 ° and 30 from the viewpoint of filter regeneration ability. It is preferably less than 0 °, more preferably 3 ° or more and less than 10 °.

  In the fifth embodiment, the interval between the light sources 52 and the interval between the light source 52 and the honeycomb structure filter 6 are the same as those in the fourth embodiment.

The deodorizing unit of the present invention includes a single filter element body, a UV light source, and a housing that supports them, and may include a fan for blowing air in order to function as a deodorizing filter. As the housing (support), a metal material such as aluminum or stainless steel or resin may be used. The resin may be protected with thin aluminum so as to suppress deterioration due to UV. Moreover, as a fan which ventilates, when the deodorizing in a 6 tatami room is assumed, what is necessary is just a capability of about 5 m < ³ > / min. It is sufficient that the wind speed passing through the filter is up to 1.5 m / s. In the present invention, the deodorizing performance is evaluated in a 6 tatami room (22 m ³ ) when the wind speed is 1.0 m / s. Further, in the present invention, the size and the surface area of the device are limited to 220 × 470 (1000 cm ² ) × 100 (about 10 L) as the size of the miniaturization that can be carried.

(Type of use)
The present invention relates to a single filter element made of a mixed photocatalyst of zeolite that adsorbs fluorinated highly active titanium oxide and odorous substances such as acetaldehyde, a straight tube type light source including a wavelength of 400 nm or less that causes photocatalysis. An apparatus for regenerating a strong and zeolite adsorbent is provided by using a housing and a blower for holding the same. This device can purify air quality like a deodorizer or an air purifier.

  An example in which the deodorizing device of the present invention is applied to an air purification device is shown in FIG. The air purification apparatus shown in FIG. 1 includes a deodorizing device including a photocatalytic filter 1 and a light source 2 on which a single filter element body is disposed, and a blower 3. First, a mixture of titanium oxide and high silica zeolite having a fluorine content in the range of 2.5 to 3.5% by weight in terms of F in a weight ratio of 7 to 3, A slurry is prepared by dispersing in about 50 wt% distilled water together with the binder solution to be mixed and ball mill mixing. This slurry is impregnated and coated on a Unitika V375 glass cloth, and the slurry is repeated several times so that the dry coating film becomes 10 μm or more. The photocatalyst layer has a layered or film-like shape with a certain thickness. There is no problem as long as the film thickness does not transmit light, and even if it is thicker than that, the reaction occurs only on the surface, so there is almost no film thickness dependency. The filter element body thus produced is cut to produce a single filter element body 4 having a desired size (FIG. 2).

  In an example of the deodorizing device of the present invention, a plurality of single filter elements are arranged in parallel with a plurality of tubular ultraviolet light sources at a right angle and in the longitudinal direction of the tubular ultraviolet light source while maintaining an elevation angle θ, or Japanese Katakana characters. And a deodorizing device having a module structure in which a light source and a filter element are integrated with a support. The elevation angle θ is larger than 0 ° and smaller than 45 °, desirably 10 ° or less, and the both-side ratio of the filter element body is 2 or more. A representative diagram of the module (deodorizing device) is shown in FIG. An air purification device that decomposes gaseous organic matter at high speed by turning on a tubular ultraviolet ray and allowing a gas containing odor to pass through the module at a wind speed of 1.0 m / s is provided. Moreover, the air purification apparatus which can adsorb | suck to a several filter element | base_body and can regenerate a plurality of filter element | elements by turning on an ultraviolet light source for the organic substance which remained after time is provided.

The light source used in the present invention is a tubular black light or cold cathode tube emitting a wavelength of 350 to 370 nm, which is a light source including a wavelength of 400 nm or less, and is a light source having a diameter of 3 mm or more and a length of 470 mm. If the light intensity is 1 mW / cm ² or more on the surface of the single filter element, there is no problem, and the catalyst activity can be increased by increasing the light intensity. However, from the viewpoints of light uniformity, power consumption, and lifetime, it is preferably about 0.5 to ⁵ mW / cm ² .

  The intervals between the plurality of filter elements are arranged by asin θ, and the single filter element from the light source is arranged so as not to be shaded between the filters. This is because, particularly when the filter (adsorbent) is regenerated, it has been confirmed that the portion not irradiated with light cannot decompose the adsorbed organic matter 100% by the photocatalytic action. In the absence of a shadow, it has been confirmed by a separate experiment that the adsorbent can be regenerated approximately 95% or more. Also, the ratio of both sides of the filter element is 2 or more. When a single filter is arranged without creating a shadow, the higher the ratio of both sides of the filter element, the higher the density of the filter. However, on the other hand, the processing and assembly man-hours increase and the cost increases. If at least a single filter element having a side ratio of 2 or more is used, the module can be miniaturized.

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

Example 1
In this example, a photocatalyst material in which titanium oxide and zeolite were mixed was used as the photocatalyst material, and a material whose acetaldehyde decomposition activity was confirmed in advance to be 11 μmol / cm ² · h was used. In addition, it has been confirmed that the filter element body uses colloidal silica as a fixing agent, the photocatalytic material is fixed to glass cloth V375 (manufactured by Unitika), and the film thickness is 50 μm or more.

  In this embodiment, this filter element is cut into a strip shape having a width of 48 mm (short side a) x a length of 220 mm (long side b), and the single filter element is 470 mm / element array interval mm, with a decimal point. The number of sheets was cut. As shown in FIG. 3, the single filter element body is perpendicular (orthogonal) to the longitudinal direction of the tubular ultraviolet light source and is parallel to the longitudinal direction of the tubular ultraviolet light source while maintaining an elevation angle θ of 7 °. .. 9 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. Next, a cold cathode tube (manufactured by Elebum) having a luminescence center wavelength of 360 nm and a length of 470 mm x a tube diameter of 4 mm is arranged vertically and parallel to the ventilation surface, with six single-sided surfaces arranged at equal intervals so as to sandwich the filter. A module having a distance of approximately 5 mm or less with the filter element was produced. The size of the module itself was 220x470x55, and the capacity was 5.7L. The distance between the end portion of the single filter element body in the longitudinal direction and the lamp adjacent to the end portion was 10 mm. Further, the both-side ratio (long side b / short side a) of the single filter element satisfies 2 or more.

(Example 2)
In this example, a module according to the present invention was manufactured in the same manner as in Example 1 except that the elevation angle was 10 ° and the arrangement interval of the single filter element bodies was 8.4 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x55, and the capacity was 5.7L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 3)
In this embodiment, the elevation angle is 30 °, the arrangement interval of the single filter elements is 24 mm, the number of lamps (tubular ultraviolet light sources) is four on one side (total of eight), and the end of the single filter element in the longitudinal direction is A module according to the present invention was manufactured in the same manner as in Example 1 except that the distance from the lamp adjacent to the end portion was 20 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x50, and the capacity was 5.2L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

Example 4
In this example, the filter element was cut into strips 72 mm wide by 220 mm long to produce a single filter element, and the arrangement interval of the single filter elements was set to 9 mm. Thus, a module according to the present invention was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 5)
In this embodiment, the number of lamps (tubular ultraviolet light sources) is four on one side (total of eight), and the distance between the end of the single filter element body in the longitudinal direction and the lamp adjacent to the end is 20 mm. In the same manner as in Example 4, a module according to the present invention was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 6)
In this embodiment, the number of lamps (tubular ultraviolet light sources) is three on one side (total of six), and the distance between the end of the single filter element body in the longitudinal direction and the lamp adjacent to the end is 30 mm. In the same manner as in Example 4, a module according to the present invention was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 7)
In this embodiment, the elevation angle is 10 °, the arrangement interval of the single filter elements is 13 mm, the number of lamps (tubular ultraviolet light sources) is four on one side (total of eight), and the end of the single filter element in the longitudinal direction is A module according to the present invention was produced in the same manner as in Example 4 except that the distance from the lamp adjacent to the end was 20 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 8)
In this embodiment, the elevation angle is 30 °, the arrangement interval of the single filter elements is 36 mm, the number of lamps (tubular ultraviolet light sources) is four on one side (total of eight), and the end of the single filter element in the longitudinal direction is A module according to the present invention was produced in the same manner as in Example 4 except that the distance from the lamp adjacent to the end was 20 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220 × 470 × 70, and the capacity was 7.2L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

Example 9
In this embodiment, the filter element body is cut into a strip shape having a width of 90 mm and a length of 220 mm to produce a single filter element, the arrangement interval of the single filter elements is 10.8 mm, and a lamp (tubular ultraviolet light source) In the same manner as in Example 1, except that the number of each side is 4 (total of 8) and the distance between the end of the single filter element body in the longitudinal direction and the lamp adjacent to the end is 20 mm. The module by was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x97, and the capacity was 10L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 10)
In this example, a module according to the present invention was produced in the same manner as in Example 9 except that the elevation angle was 10 ° and the arrangement interval of the single filter element bodies was 15.7 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x97, and the capacity was 10L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 11)
In Example 11, a module according to the present invention was produced in the same manner as in Example 9 except that the elevation angle was 30 ° and the arrangement interval of the single filter element bodies was 45 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x85, and the capacity was 8.8L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 12)
In this example, a module according to the present invention was produced in the same manner as in Example 5 except that the distance (L) between the lamp (tubular ultraviolet light source) and the single filter element was 10 mm. However, the single filter elements are arranged at intervals equal to or smaller than asin θ, and the single filter elements are arranged so that no shadow is formed between the filters from the light source. The size of the module itself was 220x470x100, and the capacity was 10L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 13)
In this embodiment, as shown in FIG. 4, six lamps (tubular ultraviolet light sources) are arranged at equal intervals so as to penetrate the center of the single filter element body, A module according to the present invention was produced in the same manner as in Example 5 except that the distance from the lamp adjacent to the end was 10 mm. The size of the module itself was 220x470x75 and the capacity was 7.8L. Further, the both-side ratio of the single filter element body satisfies 2 or more. FIG. 4 shows the module.

(Example 14)
In this embodiment, as shown in FIG. 5, the single filter element is folded in half and inverted V-shaped so that the elevation angle is maintained at 7 ° and −7 ° with respect to the longitudinal direction of the lamp (tubular ultraviolet light source). A module according to the present invention was produced in the same manner as in Example 13 except that the arrangement interval of the single filters was 9 mm. The size of the module itself was 220x470x75 and the capacity was 7.8L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Example 15)
In this example, a photocatalyst material in which titanium oxide and zeolite were mixed was used as the photocatalyst material, and a material whose acetaldehyde decomposition activity was confirmed in advance to be 11 μmol / cm ² · h was used. Moreover, the debrominated body using this photocatalytic material was fixed to corrugated paper (thickness 5 mm) using colloidal silica as a fixing agent, and it was confirmed that the film thickness was 50 μm or more. ing.

  In this example, this debrominated body was processed into a honeycomb shape of 10 mm × 70 mm × depth 72 mm to produce a box-shaped honeycomb filter of width 220 mm × height 470 mm × depth 70 mm, 40 rows and 4 rows as a whole. As shown in FIG. 6, the bottom plate of the present box-shaped honeycomb filter is perpendicular to the tubular ultraviolet light source and parallel to the longitudinal direction of the tubular ultraviolet light source while maintaining an elevation angle θ of 7 ° and an arrangement interval of 10 mm. Arranged. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. Next, cold cathode fluorescent lamps (manufactured by Elevum) having a length of emission center wavelength of 360 nm of 470 mm × tube diameter of 4 mm are arranged vertically and parallel to the ventilation surface, with four sides arranged at equal intervals so as to sandwich the filter. A module having a distance of approximately 5 mm or less with the element body was produced. The distance between the end in the longitudinal direction of the single filter element body and the lamp adjacent to the end was 20 mm. The size of the module itself was 220x470x80, and the capacity was 8.3L.

(Example 16)
In this example, as shown in FIG. 7, in the box-shaped honeycomb filter, the bottom plate is arranged in parallel so that the elevation angle θ is 0 ° (without forming the elevation angle) and the arrangement interval is 10 mm. The honeycomb filter was arranged in the same manner as in Example 15 except that the elevation angle between the main surface and the longitudinal direction of the lamp (tubular ultraviolet light source) was 7 ° (inclined by 7 ° from the horizontal axis). A module according to the invention was made. The size of the module itself was 220x470x100, and the capacity was 10.3L.

(Example 17)
In this example, a module according to this example was manufactured in the same manner as in Example 5 except that the arrangement interval of the single filter element bodies was 4.5 mm. However, the single filter element bodies are arranged at intervals equal to or smaller than asin θ, and the single filter element bodies are arranged so that shadows are formed between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example A)
In this comparative example, the same filter element body as that shown in Example 1 is used. Therefore, it has been confirmed in advance that the filter element has an acetaldehyde decomposition activity of 11 μmol / cm ² · h, and the film thickness has been confirmed to be 50 μm or more.

  In this comparative example, the filter element body was processed into a pleated shape (waveform having an angle of 45 °) without cutting the filter element body into a strip-shaped single filter element. The size of the filter element was a filter having a vertical length of 470 mm and a horizontal width of 220 mm, which was arranged in parallel with a vertical tubular ultraviolet light source shown in FIG. The straight tubular ultraviolet light source is the same as in the embodiment, and is a cold cathode tube (manufactured by Elevum) having a light emission center wavelength of 360 nm and a length of 470 mm and a tube diameter of 4 mm. The size of the module itself was 220 × 470 × 70, and the capacity was 7.2L.

(Comparative Example B)
This comparative example is the same as Example 1 except that the elevation angle is 0 °, the arrangement interval of the single filter elements is 5.9 mm, and the number of lamps (tubular ultraviolet light sources) is four on each side (total of eight). Thus, a module according to this comparative example was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x55, and the capacity was 5.7L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example C)
In this comparative example, a module according to this comparative example was produced in the same manner as in Comparative Example B, except that the elevation angle was 45 ° and the arrangement interval of the single filter element bodies was 34 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x41, and the capacity was 4.2L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example D)
This comparative example is the same as the comparative example B except that the filter element body is cut into a strip shape having a width of 72 mm and a length of 220 mm to produce a single filter element, and the arrangement interval of the single filter elements is 9 mm. Thus, a module according to this comparative example was produced. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example E)
In this comparative example, a module according to this comparative example was manufactured in the same manner as in Comparative Example D, except that the elevation angle was 45 ° and the arrangement interval of the single filter elements was 51 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x58, and the capacity was 6L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example F)
In this comparative example, a module according to this comparative example was manufactured in the same manner as in Comparative Example D, except that the elevation angle was 60 ° and the arrangement interval of the single filter element bodies was 63 mm. The single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x42 and the capacity was 4.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example G)
In this comparative example, a module according to this comparative example was manufactured in the same manner as in Example 9 except that the elevation angle was 0 ° and the arrangement interval of the single filter element bodies was 10.8 mm. However, the single filter elements are arranged at intervals equal to or greater than asin θ, and the single filter elements are arranged so that no shadow is formed between the filters from the light source. The size of the module itself was 220x470x97, and the capacity was 10L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Comparative Example H)
In this comparative example, a module according to this comparative example was manufactured in the same manner as in Comparative Example G, except that the elevation angle was 45 ° and the arrangement interval of the single filter element bodies was 64 mm. However, the single filter element bodies are arranged at intervals of asin θ, and the single filter element elements are arranged so as not to be shaded between the filters from the light source. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Reference Example I)
In this reference example, the module according to this reference example was installed in the same manner as in Example 1 except that the arrangement interval of the single filter elements was 9 mm, and two lamps (tubular ultraviolet light sources) were provided on one side (four in total). Produced. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Reference Example J)
In this reference example, the module according to this reference example was installed in the same manner as in Example 1 except that the arrangement interval of the single filter element bodies was 18 mm and the number of lamps (tubular ultraviolet light sources) was four on one side (total of eight). Produced. The size of the module itself was 220x470x80, and the capacity was 8.3L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Reference Example K)
In this reference example, a module according to this reference example was manufactured in the same manner as in Example 5 except that the distance between the lamp (tubular ultraviolet light source) and the single filter element was 15 mm. The size of the module itself was 220x470x110, and the capacity was 11L. Further, the both-side ratio of the single filter element body satisfies 2 or more.

(Evaluation of air purification performance)
The air purification performance of the deodorizing devices (modules) of Examples 1 to 17, Comparative Examples A to H and Reference Examples I to K was evaluated by the following method. Evaluation of deodorization strength is based on how much acetaldehyde in a 22.3 m ³ 6 tatami room equivalent room can be deodorized in one hour, and how much the filter is regenerated by two hours of ultraviolet light source irradiation. Measured with. Moreover, about the pressure loss, the module total pressure when it ventilates with the wind speed of 1 m / s was measured.

[Deodorization test]
An acrylic box (internal volume: 100 L) having an inlet for introducing odor components and an outlet for sampling air was prepared. A deodorizing device, a blower and a stirring fan were placed in an acrylic box. The air in the acrylic box was replaced with dry air using a stirring fan. Next, a standard gas diluted with nitrogen (including acetaldehyde) was introduced into the acrylic box, and the acetaldehyde concentration in the acrylic box was set to 1 ppm. Immediately after the introduction of acetaldehyde, the lamp (tubular ultraviolet light source) of the deodorizing device was turned on, and deodorization was started by flowing gas into the deodorizing device using a blower. The acetaldehyde concentration was measured using a gas chromatograph, and the deodorization rate was calculated from the following formula using the aldehyde concentration and the initial concentration (1 ppm) in the acrylic box 1 hour after the start of deodorization. In addition, the wind speed of the air blower was 0.5-1.5 m / s. In addition, a gas chromatograph capable of automatic sampling (trade name: GC-14B, manufactured by Shimadzu Corporation) was used as the gas chromatograph, and GASCHROPACK 56 (trade name, manufactured by GL Sciences) was used as the column.
Deodorization rate (%) = (aldehyde concentration 1 hour after the start of deodorization) / (initial concentration) × 100

[Regeneration test]
The deodorization test (deodorization time: 1 hour) was conducted to obtain the deodorization rate before the regeneration test. Next, the air in the acrylic box was replaced with dry air, and the filter was regenerated by leaving the lamp (tubular ultraviolet light source) of the deodorizing device lit for 2 hours. After filter regeneration, the above deodorization test (deodorization time: 1 hour) was performed to obtain a deodorization rate after the regeneration test. The recovery rate was calculated from the following formula using the obtained deodorization rate before the regeneration test and the deodorization rate after the regeneration test. The filter was regenerated with the stirring fan and blower stopped.
Recovery rate (%) = (deodorization rate after regeneration test) / (deodorization rate before regeneration test) × 100

(Evaluation results)
Table 2 shows the air purification performance of the modules of Examples 1 to 17, Comparative Examples A to H, and Reference Examples I to K.

  From the above results, the plurality of single filter elements have an elevation angle θ (preferably θ ≦ 10 °, particularly θ <10 °) in the longitudinal direction of the tubular ultraviolet light source that is orthogonal to the longitudinal direction of the plurality of tubular ultraviolet light sources. A deodorizing device (module) that is arranged in parallel with each other or arranged in a letter “C” (inverted V-shape), which integrates a light source and a single filter element with a support, has a device size of 10L or less and consumes a UV lamp. It was found that deodorization of 1 ppm acetaldehyde was 85% / h or more and a filter recovery rate of 95% or more was achieved with an electric power of 40 W and 12 or less. With this deodorizing device, it was found that, for example, it is possible to provide an air purification device that is sufficiently portable, facilitates filter maintenance, and can reduce odor components to a lower concentration than the conventional activated carbon adsorption method. .

In this embodiment, a black light having a center wavelength of 352 nm is used as a light source including a wavelength of 400 nm or less. However, the same effect can be achieved even if an ultraviolet ray cold cathode tube having a center wavelength near 365 nm is used. I have confirmed that. In addition, the light source is arranged so that the photocatalyst is uniformly irradiated, and the light intensity is no problem in terms of life, for example, if it is 1 mW / cm ² or more and 5 mW / cm ² or less. In this embodiment, the characteristics are examined from 0.5 m / s to 1.5 m / s as the wind speed of the blower. However, there is no problem even if the wind speed is changed depending on the size of the room to be deodorized and the blower amount of the blower. On the other hand, in this example, a photocatalyst material in which titanium oxide and zeolite are mixed is used as the photocatalyst material. For example, the surface of titanium oxide may be modified with fluorine, or the specific surface area may be increased. Depending on the gas species to be deodorized, other than mordenite type may be used. In this embodiment, a glass cloth V375 (manufactured by Unitika) is used as the base of the filter element body. However, for example, a glass cloth such as V385 (manufactured by Unitika) or M100K104H (manufactured by Unitika) may be used. good. The film thickness of the immobilized photocatalyst layer may be, for example, 50 μm or more, and may be 100 μm or 200 μm. Although an example using colloidal silica as a fixing agent is shown, alkoxide (TEOS) may be used. The coating film forming method is not limited to the slurry coating method, and may be a spraying method, a spin coating method, or the like.

  The present invention is useful for an air purification apparatus used for the purpose of deodorization, deodorization, air purification, and the like.

DESCRIPTION OF SYMBOLS 1 Photocatalyst filter 2 Straight pipe type UV light source 3 Blower 4 Single filter element body 5 Box-shaped inclination honeycomb 6 Box-shaped honeycomb 11, 21, 31 Support body 12, 22, 32, 42, 52 Light source 14, 24, 34 Single filter element body

Claims (10)

And a plurality of single filter element,
A plurality of light sources for irradiating the ultraviolet rays,
A fan for blowing air,
A deodorizing device comprising a support,
The single filter element includes a porous substrate, a photocatalyst and zeolite supported on the substrate,
The plurality of single filter elements and the plurality of light sources are integrated with the support to form a module structure,
The single filter element is substantially perpendicular to the longitudinal axis of the single filter element with respect to the longitudinal direction of the light source, and are arranged substantially parallel to, maintaining the angle of elevation (theta), said light source and said The distance from the single filter element is less than 15 mm, the distance between the light sources is 120 mm or less, the elevation angle (θ) is greater than 0 ° and less than 45 °, and the distance between the single filter elements is 1 / 2 asin θ and 2 asin θ (a: the length of the short side of the single filter element (mm)),
The fan for blowing air is disposed so as to blow air in a direction substantially perpendicular to the longitudinal direction of the light source and substantially perpendicular to the longitudinal direction of the plurality of single filter elements.
Deodorizing device. The organic substance adsorbed to the plurality of single filter elements and remaining organic substances are decomposed by turning on the plurality of light sources with a lapse of time to regenerate the plurality of single filter elements. The deodorizing device according to 1. Wherein the plurality of light sources, either through the approximate center of the lateral direction of the plurality of single filter element or the plurality of are arranged so as to be sandwiched between a single filter element, to claim 1 or 2 Deodorizing device as described. The deodorizing device according to claim 3 , wherein the single filter element body is arranged in an inverted V shape while maintaining the elevation angle (θ). Wherein the light source, the are arranged so as to sandwich the single filter element, the deodorizing device according to claim 1 or 2. The deodorization device according to any one of claims 1 to 5, wherein the elevation angle (θ) is greater than 0 ° and equal to or less than 10 °. 7. The ratio of the short side length (a) to the long side length (b) of the single filter element body (both side ratio = b / a) is 2 or more, 7. Deodorizing device as described. The deodorizing device according to any one of claims 1 to 7, wherein the base material is a glass fiber fabric. The photocatalyst is titanium oxide containing fluorine,
In the titanium oxide, the fluorine content is in the range of 2.5 wt% to 3.5 wt% with respect to the titanium oxide content, the sodium content is A wt%, and the fluorine content is The deodorizing device according to any one of claims 1 to 8 , wherein the ratio A / B is 0.01 or less when the content is B wt%. Spacing of the single filter element is substantially asinθ a (a:: length of the short side of the single filter element (mm), theta elevation of a single filter element (°)), any of claims 1 to 9 Deodorizing device according to crab.

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