JP2010240053A - Photocatalyst deodorizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorizer excellent in the deodorizing capability, capable of efficiently applying light to a photocatalyst with less pressure loss when a deodorizing device is ventilated. <P>SOLUTION: The photocatalyst deodorizer includes: a lamp 2 as an excitation light source for the rod-shaped photocatalyst; a deodorizing filter 4 with a plurality of net-like deodorizing sheets 3 including the photocatalyst layered on one another with spaces in-between; and a fan 5 as a blowing means disposed inside a body having an inlet and an outlet. The deodorizing sheets 3 are obliquely layered in such a state that the angle θ of inclination of the deodorizing sheets 3 relative to the longitudinal direction of the lamp 2 is in the range of 0<θ<90, and air blown by the fan 5 passes through the deodorizing filter 4. With this structure, the photocatalyst deodorizer with low pressure loss and high efficiency can be provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a deodorizer using a photocatalyst.

  Conventionally, in this type of deodorizing apparatus, there is a deodorizing apparatus that excites a photocatalyst while kneading it into an adsorbent that adsorbs odor components to form a photocatalyst and ventilating the honeycomb holes (for example, Patent Document 1). reference).

  Hereinafter, the deodorizing apparatus will be described with reference to FIG.

  As shown in FIG. 17, the deodorizing apparatus is formed by kneading a photocatalyst 102 into an adsorbent 101 to form a honeycomb shape. Air containing odors is passed through the honeycomb holes 103 and a lamp 104 as a photocatalyst excitation source is turned on to excite the photocatalyst 102 to decompose and deodorize the odors.

Moreover, as shown in FIG. 18, as a conventional deodorizing apparatus, it is comprised from the deodorizing unit 201 and the ultraviolet lamp 202, and the deodorizing unit 201 is comprised from several plate-shaped deodorizing body 203, These several plate-shaped deodorizing body. 203 is arranged substantially parallel to the ventilation direction, the plate-like deodorizing body 203 is made of a photocatalyst such as TiO2 and an adsorbent such as high silica zeolite, and the ultraviolet lamp 202 constitutes the deodorizing unit 201 at both ends. There is known one in which the longitudinal direction is arranged along the arrangement direction of the plate-like deodorizing bodies 203 so as to be applied to the plate-like deodorizing bodies 203 at both ends (see, for example, Patent Document 2).
Japanese Patent No. 2574840 Japanese Patent Laid-Open No. 10-286436

  Since the conventional deodorizing apparatus described in Patent Document 1 has a honeycomb structure in which the adsorbent 101 and the photocatalyst 102 are kneaded, it is difficult to maintain the shape unless the walls of the honeycomb structure are thickened. . The honeycomb structure having a thick wall has a problem that pressure loss tends to increase. In addition, the light irradiated obliquely from the lamp 104 serving as the photocatalyst excitation source is blocked by the honeycomb wall, and a shadowed portion is generated inside the honeycomb hole 103, and the photocatalyst 102 inside the honeycomb hole is not activated. There was a problem that the deodorizing performance was low. If a large number of lamps are arranged in front of the honeycomb structure, it is possible to avoid making a shade. In this case, however, there is a problem that the lamp itself blocks ventilation and pressure loss increases. When the thickness of the honeycomb is reduced in order to sufficiently apply light, the shape stability is deteriorated, and the amount of the photocatalyst supported and the light irradiation area cannot be sufficiently secured, so that the deodorizing performance is deteriorated. It was.

  Moreover, since the conventional deodorizing apparatus described in Patent Document 2 is a plurality of plate-like deodorizing bodies arranged substantially parallel to the ventilation direction, pressure loss during ventilation can be reduced. However, the light irradiated from the UV lamp in the vertical direction is not irradiated to the plate-shaped deodorant made by mixing the photocatalyst and the adsorbent, but is emitted to the outside, resulting in poor light irradiation efficiency and sufficient deodorizing performance. Had the problem of not being able to get.

  The present invention solves such conventional problems, and provides a deodorizer that can reduce the pressure loss during ventilation of the deodorization device, can efficiently irradiate the photocatalyst with light, and has excellent deodorization performance. The purpose is to do.

  In order to achieve the above object, the photocatalyst deodorizer of the present invention has a rod-shaped photocatalyst excitation light source and a plurality of deodorizing sheets containing a photocatalyst stacked at intervals in a main body having a suction port and a blowout port. A deodorizing filter and a photocatalyst deodorizing machine comprising a blowing means, wherein a deodorizing filter is disposed at a position capable of receiving light emitted from the excitation light source, and the deodorizing sheet is disposed in a longitudinal direction of the rod-shaped excitation light source. A net-like deodorizing sheet is inclined and laminated so that an inclination angle θ is in a range of 0 <θ <90, and the air sent by the blowing means is deodorized by passing through a deodorizing filter. Is.

  ADVANTAGE OF THE INVENTION According to this invention, the pressure loss at the time of ventilation of a deodorizing apparatus can be decreased, light can be efficiently irradiated to a photocatalyst, and the photocatalyst deodorizer excellent in the deodorizing performance can be provided.

  The invention according to claim 1 of the present invention includes a rod-shaped photocatalyst excitation light source, a deodorizing filter in which a plurality of deodorizing sheets containing a photocatalyst are stacked at intervals, and a blower in a main body having a suction port and a blowout port. A deodorizing filter is disposed at a position where the light emitted from the excitation light source can be received, and the inclination angle θ of the deodorization sheet with respect to the longitudinal direction of the rod-shaped excitation light source is 0. A net-like deodorizing sheet is inclined and laminated so as to be in a range of <θ <90, and the air sent by the blowing means is deodorized by passing through a deodorizing filter. In order to improve the deodorizing performance, it is better to include more photocatalyst in the deodorizing sheet. For this purpose, it is necessary to make the deodorizing sheet net-like and make the mesh fine. However, if the mesh is made fine, the pressure loss of the deodorizing sheet increases, and in the method of passing air through the honeycomb holes as in Patent Document 1, it is difficult to let air pass through the mesh and the deodorizing performance is lowered. In the present invention, by arranging the deodorizing sheets stacked at intervals, the wind sent by the air blowing means passes along the inclined surface of the deodorizing sheet, and the deodorizing filter can be low pressure loss. it can. In addition, since the deodorizing filter has an inclination angle with respect to the excitation light source, light can be received efficiently, and an effect that the deodorizing performance is improved as compared with the case of not having an inclination angle as in Patent Document 2 is obtained. Moreover, since the deodorizing sheet is a net having an opening, the probability that the passing air becomes a turbulent flow on the surface of the deodorizing sheet and comes into contact with the photocatalyst increases, so that the deodorizing performance can be improved.

  Further, the deodorizing sheet is inclined so that the inclination angle θ of the deodorizing sheet is in the range of 40 <θ <78, and the surface of the deodorizing sheet in which the wind sent by the blowing means is inclined The deodorizing filter can be low pressure loss. Moreover, since the deodorizing filter has an inclination angle with respect to the excitation light source, the light can be received efficiently, and the deodorizing performance is improved. Further, since the deodorizing sheet has a net-like shape having an opening and has an inclination angle, the probability that the passing air becomes a turbulent flow on the surface of the deodorizing sheet and comes into contact with the photocatalyst is increased. Deodorizing performance can be improved compared to the shape.

  In addition, the inclination angle and stacking interval of the deodorizing filter are adjusted so that the light emitted from the excitation light source in the vertical direction is shielded by the deodorization filter, and the light emitted from the excitation light source Can be used efficiently without wastefully discharged to the outside, and excellent deodorizing performance can be obtained.

  In addition, a plurality of deodorizing sheets are arranged so that the distance between the adjacent end surfaces of the excitation light source and the deodorizing sheet is the same. Since the performance is better as the distance between the deodorizing sheet and the excitation light source is shorter, excellent deodorizing performance can be obtained by aligning the adjacent end faces of all the deodorizing sheets.

  Further, the proximity end surface of the excitation light source and the deodorizing sheet is inclined so as to be at the lowest position of the deodorizing sheet. Since the deodorizing sheet has an inclination angle, it easily moves to a low position by the action of gravity. An excellent deodorizing performance can be obtained by setting the lowest position of the deodorizing sheet to a position close to the excitation light source. Moreover, when liquid, such as oil mist, is contained in air, the oil adhering to a deodorizing sheet moves to a low position by the effect | action of gravity. Since the low position of the deodorizing sheet is in the vicinity of the excitation light source, the light intensity is the strongest and the oil is quickly decomposed.

  In addition, it is characterized by stacking deodorizing sheets at equal intervals. By stacking the deodorizing sheets at equal intervals, uniform air can be sent to the deodorizing sheets, so that deodorizing performance is efficiently produced. be able to.

  Further, the deodorizing sheet is supported by a spacer, and since the interval between the deodorizing sheets can be maintained, fluctuations in the pressure loss distribution of the deodorizing filter due to the increase or decrease in the interval can be suppressed. . As a result, since uniform air can be sent to the deodorizing sheet, the deodorizing performance can be efficiently extracted.

  In addition, the spacer is characterized by having a light reflecting action, and the light irradiated on the spacer can be reflected to irradiate the deodorizing sheet, so that excellent deodorizing performance can be obtained.

  In addition, a plurality of spacers are provided at intervals of 70 mm or less, and the deformation due to deflection of the deodorizing filter can be suppressed by setting the intervals of the spacers to 70 mm or less. As a result, since uniform air can be sent to the deodorizing sheet, the deodorizing performance can be efficiently extracted.

  In addition, the deodorizing sheet is characterized in that a photocatalyst is supported on a glass fiber fabric, and the glass fiber is not subject to deterioration by a photocatalyst like an organic synthetic fiber, and is highly reliable deodorizing over a long period of time. A sheet can be obtained. Moreover, since glass fiber has a light transmittance and light scattering property, it can irradiate light to a photocatalyst efficiently and can obtain the outstanding deodorizing performance.

  Further, the glass fiber fabric is formed by a fiber bundle obtained by bundling a plurality of short fiber glasses. When a photocatalyst is supported on a fiber bundle in which a plurality of short fiber glasses are bundled, photocatalyst particles enter or adhere between the fibers and are fixed. Compared with the case where the photocatalyst is supported on the surface of a thick short fiber, the photocatalyst can be held between the fibers, so that the supported amount can be increased. In addition, the photocatalyst particles that have entered between the fibers are firmly fixed by being sandwiched between the fibers, and even when an impact is applied from the outside, the impact is transmitted through the fiber so that it is difficult to fall off. .

  In addition, the photocatalyst is fixed to the glass fiber fabric using a light-transmitting binder, and since the light-transmitting binder is used, the binder has light-transmitting properties and light-scattering properties. The photocatalyst can be efficiently irradiated with light, and excellent deodorizing performance can be obtained.

In addition, the main component of the light-transmitting binder is SiO ₂ , and the alkali component that lowers the crystallinity of the photocatalyst does not elute from the binder, and the deodorizing performance of the photocatalyst is unlikely to decrease. Has an effect.

  Moreover, the deodorizing sheet is characterized by containing an adsorbent, and by containing the adsorbent, the odor can be concentrated with the adsorbent and efficiently decomposed with the photocatalyst, and excellent deodorizing performance can be obtained. Obtainable. Moreover, even when the photocatalyst is not irradiated with light, a deodorizing action can be obtained.

  In addition, it is characterized by having a protective cover on the lighting tube of the excitation light source. By attaching a protective cover to the lighting tube of the excitation light source, devitrification due to damage of the lighting tube can be prevented. , An excitation light source having excellent mechanical strength can be obtained. In addition, when the excitation light source is ventilated, the temperature of the excitation light source may decrease and the light emission intensity may decrease. By attaching a protective cover, the temperature decrease of the excitation light source may be suppressed and the decrease in emission efficiency may be reduced. Has the effect of being able to

  In addition, it is characterized in that two sets of deodorizing filters are arranged so as to be symmetrical with respect to the excitation light source, and the light emitted from the excitation light source is not emitted to the outside wastefully, It can be used efficiently and excellent deodorizing performance can be obtained.

  In addition, the deodorizing sheet of the deodorizing filter is detachable from the surface not in contact with the excitation light source, and the deodorizing sheet can be attached and detached without contacting the lamp, and maintenance is easy. It has the action.

  Further, the dust collection filter carrying the antibacterial metal and / or the photocatalyst is provided at a position where the light emitted from the excitation light source can be received, and the antibacterial property can be imparted to the dust collection filter. Since the dust collection filter has antibacterial properties, bacteria and mold collected by the dust collection filter do not grow on the surface of the dust collection filter and generate odor. When the photocatalyst is supported, in addition to antibacterial properties, the fungus dead bodies can be decomposed to keep the dust collecting filter clean.

  In addition, it is characterized by carrying antibacterial metal and / or photocatalyst only on the surface that can receive the light of the dust collection filter, and efficiently using the light irradiated to the dust collection filter, Antibacterial metals and / or photocatalysts can be activated. Moreover, compared with the case where an antibacterial metal and / or photocatalyst is carried on the entire dust collection filter, the amount carried can be reduced, and a dust collection filter excellent in economic efficiency can be obtained.

Further, the present invention is characterized in that a dust collection filter is provided at a position where the ultraviolet light intensity of the light emitted from the excitation light source is 0.001 mW / Cm ² or more, and sufficient antibacterial properties are obtained for the dust collection filter. be able to. Since the dust collection filter has antibacterial properties, bacteria and mold collected by the dust collection filter do not grow on the surface of the dust collection filter and generate odor.

  In addition, the dust collection filter is provided at a position where it can receive light having a bactericidal effect irradiated from an excitation light source. Bacteria and mold collected by the dust collection filter are Since it is sterilized, it does not grow on the surface of the dust collecting filter and does not generate an odor.

  In addition, at least a part of the excitation light source has an antibacterial action, and bacteria and fungi collected by the dust collection filter are inhibited from growing by light, so that they grow on the surface of the dust collection filter. There is no smell.

  In addition, an ozone decomposing means is provided between the excitation light source and the outlet, and an effect that ozone is not released to the outside of the photocatalyst deodorizer can be obtained. Moreover, the deodorizing effect can be further enhanced by the reaction between ozone and odor. In addition, since bacteria and fungi collected by the dust collection filter are sterilized by ozone, they do not grow on the surface of the dust collection filter and generate odor.

  In addition, the material of the dust collection filter is a metal or an inorganic compound, and the photocatalyst deodorization that does not deteriorate the performance for a long time with very little deterioration of the dust collection filter due to the light irradiated from the excitation light source. You can get a chance.

  The dust collection filter is a pleated metal or inorganic fiber, and the pleated folds are arranged in the longitudinal direction of the excitation light source. The dust collection filter can increase the surface area and reduce pressure loss by pleating. By the pleating process, the dust collection filter has peaks and valleys, but the valleys are less likely to receive light from the excitation light source. By aligning the pleated folds in the longitudinal direction of the excitation light source, light is irradiated to the valley of the dust collection filter, and bacteria and mold collected by the dust collection filter are sterilized by the light. The odor does not grow on the surface of the dust collection filter.

  In addition, a reflection plate that reflects light emitted from the excitation light source is provided, and the excitation light source, the deodorizing sheet, the dust collection filter, and the reflection plate are arranged in this order. The light from the excitation light source attenuates as the distance increases. In the deodorization by the photocatalyst, the deodorization performance increases with the increase of the ultraviolet intensity, and it is necessary to irradiate strong light particularly in order to quickly decompose the high concentration gas. On the other hand, sterilization with a photocatalyst does not need to completely decompose the fungus, and the fungicidal effect is exhibited by inhibiting the functions necessary for the growth of the fungus by active species such as OH radicals or damaging some cells. Therefore, the amount of ultraviolet light may be small. As in the present invention, by arranging the excitation light source, the deodorizing sheet, the dust collecting filter, and the reflecting plate in this order, a photocatalytic deodorizing machine having both deodorizing performance and sterilizing performance can be obtained. Moreover, the photocatalyst deodorizer which further improved the deodorizing performance and the disinfection performance can be obtained by reflecting light with a reflecting plate. Further, even when the photocatalyst is peeled off from the deodorizing sheet due to a strong impact or the like, it can be collected by the dust collecting filter, and the photocatalyst is not scattered outside the photocatalytic deodorizer.

  In addition, a suction port is provided between the reflector and the dust collection filter, which reflects light and improves the sterilization performance of the dust collection filter and the deodorization performance of the deodorization sheet. A photocatalytic deodorizer that can pass well can be obtained.

  In addition, the excitation light source is arranged so that it cannot be seen directly from the outside of the main body of the photocatalyst deodorizer, and since the light source cannot be seen directly, the influence on the human body due to ultraviolet rays is reduced, and it also looks Has the effect of not being dazzling.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 is a schematic sectional view of a photocatalyst deodorizer according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view (side view) of a lamp and a deodorizing filter section of the photocatalyst deodorizer according to Embodiment 1 of the present invention, and FIG. It is an enlarged view (plane) of a lamp | ramp and a deodorizing filter part.

  In the photocatalyst deodorizer of the present invention, a plurality of lamps 2 serving as excitation light sources for rod-like photocatalysts and a net-like deodorized sheet 3 containing a photocatalyst are stacked inside a main body 1 having a suction port and a blowout port at intervals. A deodorizing filter 4 and a fan 5 as a blowing means are provided. The deodorizing filter 4 is disposed at a position where it can receive light emitted from the lamp 2. As shown in FIG. 3, the inclination angle θ formed by the longitudinal direction A of the lamp 2 and the surface direction B of the deodorizing sheet 3 is set so as to be in the range of 0 <θ <90, and is sent by the fan 5 as the air blowing means. The resulting air is deodorized by passing through the deodorizing filter 4. The deodorizing sheet 3 is a net-like body made of fibers 6, and has an infinite number of openings in a substantially planar sheet.

  In the present invention, by arranging the deodorizing sheets 3 at intervals, most of the wind sent by the fan 5 passes in the direction B along the inclined surface of the deodorizing sheet 3. Since only the wind of the part passes through the mesh of the deodorizing sheet 3, the deodorizing filter can be reduced in pressure. The odor contained in the wind is adsorbed by the deodorizing filter and deodorized by the action of the photocatalyst. As shown in FIG. 3, since the deodorizing sheet 3 is a net having openings, there is a high probability that the passing air becomes turbulent on the surface of the deodorizing sheet and contacts the photocatalyst, and the deodorizing performance is improved. Have. In addition, since the deodorizing sheet is net-like, the surface area of the sheet is larger than that of a flat sheet without opening, and the contact area with the gas and the irradiation area of light can be increased. Excellent deodorizing performance Can be obtained.

  As photocatalysts, metal oxides such as tin oxide, zinc oxide, tungsten trioxide, titanium oxide, strontium titanate, iron oxide, bismuth oxide, metal sulfides such as zinc sulfide, cadmium sulfide, molybdenum sulfide, titanium nitride, etc. In view of safety and economy, titanium oxide is preferable. Further, a cocatalyst such as Pt, PD, Rh, Ru, Au, Ag, Cu, Zn may be added to the surface of the photocatalyst.

  Examples of the base material of the deodorizing sheet containing the photocatalyst include metals, plastics, synthetic resin fibers, natural fibers, wood, paper, glass, ceramics, and the like. A material that can ensure photocatalytic performance and supporting strength is desirable, and metal, ceramic, glass, and the like are suitable. When plastic or paper is used as the base material, it is desirable to support the photocatalyst by coating the surface of the base material with silicone or fluororesin.

  The shape of the deodorizing sheet is not particularly limited as long as it has an opening on the sheet surface, and a punching shape in which holes are formed in the sheet, a knitted shape in which fibers are knitted, a non-woven fabric shape in which fibers are bonded, and the like are suitable. The sheet is preferably as flat as possible, but may be curved as long as the stacked sheets do not contact each other.

  As the blowing means, there is no particular problem as long as wind can be taken into the main body, and any blowing means such as a propeller fan, a sirocco fan, and a turbo fan can be used. The amount of air through which the air sent by the blowing means passes through the deodorizing filter can be designed in an arbitrary range. However, in order to obtain sufficient deodorizing performance, the air speed is preferably about 0.2 to 2 m / s.

  Examples of the rod-like excitation light source for activating the photocatalyst include lamps such as black light, cold cathode tubes, germicidal lamps and fluorescent lamps. Any means can be used as long as it can excite the photocatalyst, but a cold cathode tube is preferable as a light source because it is relatively low cost and has a long durability life. A plurality of LED light sources may be arranged in a straight line to form a rod-shaped excitation light source.

As shown in FIG. 2, the intensity of light generated from the lamp 2 as the excitation light source is strongest in the direction C perpendicular to the longitudinal direction A of the light source. As the light intensity increases, the photocatalyst is activated and the deodorizing performance is improved. Therefore, the deodorizing sheet is parallel to the longitudinal direction A of the light source, that is, the inclination angle θ formed by the longitudinal direction A of the light source and the surface direction B of the deodorizing sheet is 0 °. Then, the light irradiation intensity with respect to the deodorizing sheet becomes the strongest. However, in this arrangement, the deodorizing sheet blocks the ventilation, so the pressure loss increases, and the amount of air that can pass through decreases, so the deodorizing performance of the deodorizing device decreases. Therefore, the inclination angle θ formed by the longitudinal direction A of the light source and the surface direction B of the deodorizing sheet 3 is controlled to an optimum value within the range of 0 <θ <90, and the light irradiated in the vertical direction from the excitation light source is C ′. As described above, the light is shielded by the deodorizing filter, and more preferably, the inclination angle θ is in the range of 40 <θ <78. At this time, the optimum inclination angle θ that can be arranged so as to be shielded from light by the deodorizing filter varies depending on the stacking interval of the deodorizing sheets and the sheet width in the B direction. When the deodorizing sheet stacking interval is h and the width of the deodorizing sheet is w, the optimum inclination angle θ is h / w = Cos θ.
It can be calculated by the following formula. For example, when the thickness w of the deodorizing filter is 3 Cm and the stacking interval h is 1 Cm, the inclination angle θ is preferably about 70.5 °. By disposing the deodorizing sheet in this way, the light irradiated from the excitation light source can be efficiently used without being wastedly emitted to the outside, and excellent deodorizing performance can be obtained.

  Although the distance between the excitation light source and the deodorizing sheet can be designed freely, the light intensity received by the deodorizing sheet increases as the distance decreases. Therefore, as shown in FIG. 2, when arranging a plurality of deodorizing sheets, the deodorizing sheets are arranged in parallel so that the distance between the position A ′ of the adjacent end surfaces of the excitation light source position A and the deodorizing sheet is the same. It is preferable to do.

The light emitted from the excitation light source to the deodorizing filter is preferably irradiated to the deodorizing filter so that ultraviolet light having a wavelength of 400 nm or less is in the range of 0.1 to 5.0 mW / Cm ² , more preferably 0.5. The light intensity is ˜2 mW / Cm ² . The irradiation intensity can be controlled by designing the number of excitation light sources, the emission intensity, and the distance between the excitation light source and the deodorizing filter to arbitrary values.

  It is efficient if the proximity end surfaces of the excitation light source and the deodorizing sheet are inclined so as to be at the lowest position of the deodorizing sheet. Since the deodorizing sheet has an inclination angle, it easily moves to a low position by the action of gravity. An excellent deodorizing performance can be obtained by setting the lowest position of the deodorizing sheet to a position close to the excitation light source. Moreover, when liquid, such as oil mist, is contained in air, the oil adhering to a deodorizing sheet moves to a low position by the effect | action of gravity. Since the low position of the deodorizing sheet is in the vicinity of the excitation light source, the light intensity is the strongest and the oil is quickly decomposed.

  Moreover, the part which cannot receive light can be minimized by laminating | stacking a deodorizing sheet | seat at equal intervals. Moreover, since uniform air can be sent to the deodorizing sheet, the deodorizing performance can be efficiently extracted. Although there is no restriction | limiting in particular in a lamination | stacking space | interval, Preferably it is good to set it as the distance of 0.1-10 Cm.

  The deodorizing sheet may be a glass fiber fabric carrying a photocatalyst. Glass fiber is not subject to deterioration by a photocatalyst unlike organic synthetic fiber, and a highly reliable deodorizing sheet can be obtained over a long period of time. Moreover, since glass fiber has a light transmittance and light scattering property, it can irradiate light to a photocatalyst efficiently and can obtain the outstanding deodorizing performance. As the material of the glass fiber, quartz glass, E glass, C glass, S glass, and A glass having light transmittance and light scattering properties can be used. Although a fiber shape is not specifically limited, It is preferable to form with the fiber bundle which bundled multiple short fiber glass which has a diameter of 4-9 micrometers rather than a single fiber. The fiber bundle can be used by bundling an arbitrary number of about 50 to 6400. When a photocatalyst is supported on a fiber bundle in which a plurality of short fiber glasses are bundled, photocatalyst particles enter or adhere between the fibers and are fixed. Compared to the case where the photocatalyst is supported on the surface of a thick single fiber, the amount of the support can be increased because the photocatalyst can be held between the fibers. In addition, the photocatalyst particles that have entered between the fibers are firmly fixed by being sandwiched between the fibers, and even when an impact is applied from the outside, the impact is transmitted through the fiber so that it is difficult to fall off. .

  In addition, it is common to use a binder such as starch called a sizing agent in order to prevent the fibers from falling off when making the above-mentioned glass fiber fabric, but the binder is decomposed by the photocatalyst and causes a decrease in deodorizing performance. Therefore, after forming the glass fiber fabric, it is better to carry out the binder burning process at a high temperature of 400 ° C. or higher.

The basis weight of the glass fiber fabric is preferably 10 to 900 g / m ² , and in order to facilitate the production, it is preferable to select 100 to 400 g / m ² . The weaving method may be any weaving method such as plain weaving, twill weaving, satin weaving, tangle weaving or imitation weaving, but imitation weaving is preferred from the viewpoint of shape stability. The yarn density is preferably 20-40 fibers / 25 mm in length / width, a thickness of 0.1-2 mm, and a tensile strength of 100 N / 25 mm or more.

  Examples of the method for supporting the photocatalyst on the glass fiber fabric include dip coating, spraying, electrodeposition, vapor deposition, and the like, and any means may be used as long as the photocatalyst can be immobilized on the substrate surface of the deodorizing sheet. If the carrying amount is not enough in one treatment, a plurality of treatment steps may be repeated. Moreover, when using photocatalyst sol, it can fix to a base material by heating about 30 to 60 minutes at the temperature of about 50 to 150 degreeC with a dryer.

The photocatalyst may be fixed to the substrate using a light transmissive binder. By using a light-transmitting binder, the binder has light-transmitting properties and light-scattering properties, so that the photocatalyst can be efficiently irradiated with light, and excellent deodorizing performance can be obtained. Examples of the light transmissive binder include alkali silicates composed of silicates such as NA ₂ O, K ₂ O, and LiO ₂ , inorganic colloids such as silica sol, alkoxides such as silica, silicon, and titanium, and hydrolysates thereof. Can be mentioned. In order to improve the strength, silicone, fluorine resin, or the like may be included. In addition, since an alkali component such as NA may reduce the crystallinity of the photocatalyst and may deteriorate the photocatalytic performance, it is preferable that the main component is SiO ₂ as a binder, silica sol or silica alkoxides. A hydrolyzate or the like is preferred.

  The deodorizing sheet may contain an adsorbent. By including the adsorbent, the odor can be concentrated with the adsorbent and efficiently decomposed with the photocatalyst, and excellent deodorization performance can be obtained. Moreover, even when the photocatalyst is not irradiated with light, a deodorizing action can be obtained. Examples of the adsorbent include activated carbon, activated carbon fiber, zeolite, silica gel, sepiolite, diatomaceous earth, and the like, and high silica zeolite (Si / Al = 16 or more) having a small amount of light absorption in the ultraviolet region is preferable. Arbitrary blending can be used as the ratio of the photocatalyst to the adsorbent, but the photocatalyst concentration is preferably 20 to 80 wt%.

  The lighting tube of the excitation light source may be provided with a protective cover. As a material for the lighting rod, a material capable of transmitting light, such as quartz glass, E glass, C glass, S glass, and A glass, can be used. In order to improve the light transmittance, it is preferable to use a quartz tube with few impurities, but a quartz bottle is relatively expensive. Moreover, in order to improve the light transmittance, it is preferable to make the lighting tube as thin as possible, but there is a problem that the mechanical strength is lowered and it is easily broken. By attaching a protective cover to the outer periphery of the lighting tube of the excitation light source, devitrification due to damage to the lighting tube can be prevented, and an excitation light source having excellent mechanical strength can be obtained. In addition, when the excitation light source is ventilated, the temperature of the excitation light source may decrease and the light emission intensity may decrease. By attaching a protective cover, the temperature decrease of the excitation light source may be suppressed and the decrease in emission efficiency may be reduced. Has the effect of being able to The protective cover is not particularly limited as long as it transmits light and has excellent mechanical strength, and glass, fluorine resin, acrylic resin, or the like can be used. Even a non-light-transmitting material such as metal can be used as a protective cover if it is formed into a cylindrical shape by processing it into a shape having an opening such as a wire mesh or punching metal.

(Embodiment 2)
4 is a perspective view showing a deodorization part of the photocatalyst deodorizer according to Embodiment 2 of the present invention, and FIG. 5 is a perspective view of the photocatalyst deodorizer shown in FIG. 4 cut along the DD ′ plane, FIG. 6 and FIG. 7 is a component drawing of the side plate.

  As shown in FIG. 4, the lamp 2 and the deodorizing filter 4 as the excitation light source are fixed by a top plate 7 and a side plate 8. Six lamps 2 are arranged so as to be parallel to the side plate 8. A deodorizing filter 4 in which a plurality of net-like deodorizing sheets 3 including a photocatalyst are stacked at intervals is disposed on the upstream and downstream sides of the lamp 2. By adopting such an arrangement, two sets of deodorizing filters are arranged symmetrically across the excitation light source, so that the light emitted from the excitation light source is not emitted to the outside and is efficient Can be utilized in an effective manner, and excellent deodorizing performance can be obtained.

  The deodorizing sheet 3 is inclined and laminated so that the inclination angle θ of the deodorizing sheet 3 is in the range of 0 <θ <90, and the air sent by the blowing means (not shown) is deodorized by passing through the deodorizing filter 4. The As shown in FIGS. 5 and 6, the deodorizing sheet 3 is supported by an equally spaced support portion provided on the side plate 8 and an equally spaced support portion formed by the spacer 9. Examples of means for providing the support portion on the side plate include a method of providing a groove in the plate, a method of providing a protrusion on the plate, and a method of bonding the plate and the deodorizing sheet with an adhesive. Examples of means for providing the support portion on the spacer include a method of providing a slit in the spacer, a method of providing thorn-shaped protrusions on a rod-shaped spacer, and a method of bonding the spacer and the deodorizing sheet with an adhesive.

  With the above configuration, the interval between the deodorizing sheets can be kept constant, and therefore the distribution of the pressure loss of the deodorizing filter due to the increase or decrease in the interval can be suppressed. As a result, since uniform air can be sent to the deodorizing sheet, the deodorizing performance can be efficiently extracted.

  The spacer preferably has a light reflecting action, can reflect the light irradiated to the spacer and irradiate the deodorizing sheet, and can obtain excellent deodorizing performance. Examples of the material for the spacer include stainless steel, aluminum, and glass. By setting the interval between the plurality of spacers to 70 mm or less, deformation due to the deflection of the deodorizing filter can be suppressed. As a result, since uniform air can be sent to the deodorizing sheet, the deodorizing performance can be efficiently extracted. Moreover, the surface vibration of the filter can be suppressed, and the generation of noise can be reduced.

  Depending on the shape of the spacer and the side plate, the support shape of the deodorizing sheet can be changed. FIG. 6 shows an example in which the deodorizing sheet is supported in a flat shape, and the pressure path can be reduced because the air path between the laminated deodorizing sheets is a straight line. FIG. 7 shows another example of a side plate shape, which is an example in which a deodorizing sheet is supported by being curved. In this case, since the air path between the laminated deodorizing sheets becomes a curve, the pressure loss increases as compared with the example of FIG. 6, but the light emitted between the deodorizing sheets is blocked by the curved deodorizing sheets, and the deodorizing filter Therefore, it is possible to improve the deodorizing efficiency by using light efficiently.

8 and 9 are exploded views of the photocatalytic deodorizer of FIG. The deodorizing sheet 3 of the deodorizing filter is detachable from the surface not in contact with the lamp 2. Deodorizing filters _{NOx, NH 3, H 2 S} , may nitrate when CH ₃ SH and the like used for a long time in an atmosphere which is present in high concentrations, such as sulfates to degradation by storage, requires that when replacement It is. By setting it as the said structure, the deodorizing sheet 3 can be attached or detached in the arrow E direction, without contacting the lamp | ramp 2, and it has the effect | action that a maintenance is easy.

  Further, as shown in FIG. 9, by providing the notch 10 in the top plate 7, the lamp 2 can be easily attached and detached in the direction of arrow F (FIG. 8), and the maintainability is improved. When installing the lamp, the lamp 2 is inserted in the F ′ direction from the notch 10 (the inserted state is G), and rotated in the G state so that the lamp 2 is inserted into the groove formed on the back side of the notch 10. What is necessary is just to fix (a state of H) so that a terminal (or lead wire) may enter. The terminal of the lamp is made of elastic silicon rubber and has a size slightly larger than the width of the notch 10 of the top plate 7. By doing in this way, the terminal and lead wire which were provided in the edge part of the lamp | ramp 2 can be fixed to the top plate 7. FIG.

(Embodiment 3)
FIG. 10 is a schematic sectional view of a photocatalyst deodorizer according to Embodiment 3 of the present invention. The description of the same parts as in the first and second embodiments is omitted.

  The photocatalyst deodorizer of the present invention includes a lamp 2 as an excitation light source for a rod-like photocatalyst inside a main body 1, a deodorizing filter 4 in which a plurality of net-like deodorizing sheets 3 containing a photocatalyst are stacked at intervals, and a blowing means. Fan 5, a first dust collection filter 11 having a coarse mesh, a second dust collection filter 12 having a fine mesh, and a reflector 13 are provided. The first dust collection filter 11 and the second dust collection filter 12 are disposed at a position where the light emitted from the lamp 2 can be received.

  The second dust collection filter 12 is processed into a pleated shape, and has a peak portion 14 and a valley portion 15 close to the lamp 2. The pleated folds are arranged in the longitudinal direction of the lamp 2 as a rod-shaped excitation light source, so that the lamp light can reach not only the peak part 14 but also the valley part 15 of the second dust collecting filter.

  Air sucked into the photocatalyst deodorizer from the suction port provided between the reflector 13 and the first dust collecting filter 11 by the action of the fan 5 is sucked into the main body 1. The air from which the fiber dust, coarse dust, bacteria adhering to it, and the like are removed by the first dust collecting filter 11 is deodorized when passing through the deodorizing filter 4, and the second dust collecting filter 12 further refines the air. Bacteria and mold are removed and released as clean air. The surface of the second dust collection filter 12 on the lamp side carries silver as an antibacterial metal and a photocatalyst, and imparts bactericidal properties to the second dust collection filter. In addition, since the lamp 2 is a plurality of lamps, and some of them are lamps having a sterilizing action, the bacteria and molds collected in the first dust collecting filter and the second dust collecting filter are Bacteria and mold that have been sterilized and collected promptly do not grow on the surface of the dust collection filter and generate odors. In addition to antibacterial properties, the part carrying the photocatalyst can be decomposed to the dead bodies of bacteria to keep the dust collection filter clean.

  In the deodorization by the photocatalyst, the deodorization performance is enhanced as the ultraviolet intensity is increased. This is because the photocatalyst generates active species such as OH radicals according to the amount of light. In particular, in order to quickly decompose high-concentration gas, it is necessary to generate a large amount of active species with strong light energy. On the other hand, with antibacterial photocatalysts, it is not necessary to completely decompose the fungus, and the antibacterial effect is demonstrated by inhibiting the functions necessary for the growth of the fungus by active species such as OH radicals or damaging some cells. Therefore, the amount of ultraviolet light may be small. As in the present invention, by first irradiating the deodorizing filter with light generated from the light source to exert the deodorizing effect, and by applying the light attenuated through the deodorizing filter to the dust collecting filter, the antibacterial effect is exhibited. The deodorizing effect and the antibacterial effect can be efficiently obtained with one light source. Moreover, since only one light source is required, the photocatalyst deodorizer can be simplified.

If photocatalyst dust filter is carried, ultraviolet intensity of light irradiated may be any 0.001 mW / Cm ² or more, more preferably 0.1 mW / Cm ² or more, more preferably 0 .5 mW / Cm ² or more. Since the dust collection filter has antibacterial properties, bacteria and molds collected by the dust collection filter do not grow on the surface of the dust collection filter and generate odors.

  As the photocatalyst carried on the dust collection filter, the same one as the deodorizing filter can be used, and titanium oxide is preferable from the viewpoints of safety and economy. Examples of antibacterial metals include Ag, Cu, Zn, Ni, Cr, etc. Even when light from a light source is not exposed, antibacterial properties are exhibited, so even if dust or sand adheres to the surface of the photocatalyst. Can suppress the growth of fungi and mold. Note that there is no problem even if an inorganic compound such as silver zeolite or silver-containing zirconium phosphate that elutes metal ions such as silver, copper, and zinc is used instead of metal.

  Examples of the lamp having antibacterial action include black light, cold cathode fluorescent lamp, germicidal lamp and the like, and those containing light with a wavelength of 400 nm or less are preferable, and particularly when ultraviolet rays with a wavelength of 254 nm are contained, the effect is high. In addition, when ultraviolet rays having a wavelength of 185 nm are included, oxygen molecules in the air can be changed to ozone and a large amount of anions can be emitted, so that the deodorizing effect and the antibacterial effect can be further enhanced. Further, the type of phosphor applied to the lamp may be changed for each location, and for example, the upper part of the lamp may emit ultraviolet light at 365 nm and the lower part of the lamp may emit ultraviolet light at 254 nm.

  When ozone is generated, it is preferable to provide an ozone decomposing means between the excitation light source and the outlet. By the ozonolysis means, an effect that ozone is not released to the outside of the photocatalyst deodorizer can be obtained. Moreover, the deodorizing effect can be further enhanced by the reaction between ozone and odor. As the ozonolysis means, activated carbon, metal oxides such as manganese, cobalt, nickel, iron and silver and hydroxides can be used. The ozonolysis means may be carried by being mixed with the photocatalyst on a part of the photocatalyst sheet, or may be provided with a sheet carrying only the ozonolysis means. Further, the ozonolysis means may be applied to a part of the dust collecting filter or may be applied to the inner surface of the main body.

  The material of the dust collection filter is preferably a metal or an inorganic compound, such as metals such as aluminum, iron, stainless steel, gold, silver, copper, silica alumina, alumina, silica glass, rock wool, potassium titanate, wollast. Night etc. are mentioned. As the metal or inorganic compound, a fiber, network, or plate is suitable, and a binder may be included in order to adhere the metal or inorganic compound. The binder may be an organic compound as long as the amount is small. When an organic compound such as plastic or paper is used, it is desirable to carry a photocatalyst by covering with silicone or fluororesin. It is possible to obtain a photocatalyst deodorizer in which the dust collecting filter is hardly deteriorated by light irradiated from the excitation light source and the performance is not deteriorated for a long time.

  As the shape of the dust collecting filter, a net shape, a punching shape, a knitted shape, a non-woven fabric shape, or the like may be used, and the dust collecting filter may be processed into a pleated shape. By pleating, the surface area can be increased and the pressure loss can be reduced.

  The reflecting plate only needs to reflect light, and aluminum, iron, stainless steel, glass, or the like can be used. You may adhere | attach metal foil to resin, or what vapor-deposited metal may be used as a reflecting plate.

  It is preferable to arrange the reflector so that the excitation light source cannot be directly viewed from the outside of the main body of the photocatalyst deodorizer. Specifically, when viewed from the direction D in FIG. 10, the reflection light source may be shielded so that the excitation light source cannot be seen directly. For this purpose, the reflector 13 is preferably made larger than the deodorizing filter 4. The reflection plate may be a single plate, may be divided into blinds, or may be punched. By the said structure, the influence on the human body by an ultraviolet-ray can be reduced, and the photocatalyst deodorizing machine which is not dazzling visually can be obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is limited to the following description and is not interpreted at all.

(Pressure loss)
After weighing and mixing the materials so that the powdered titanium oxide is 8 wt% as the photocatalyst, the high silica zeolite as the adsorbent is 20 wt%, the colloidal silica as the binder is 60 wt%, and the purified water is 12 wt%. Then, the mixture was dispersed and mixed in a ball mill for 24 hours to prepare a slurry. The resulting slurry was dipped in a glass fiber woven fabric with an opening ratio of 15%, impregnated with a photocatalyst, air blown to remove excess liquid, and then dried with a dryer at 120 ° C. for 30 minutes to create a deodorizing sheet containing the photocatalyst. . The supported amount of the catalyst, the adsorbent and the binder was 500 g / m ² . The glass fiber fabric used as the base material for the deodorizing sheet was a woven fabric with a basis weight of 354 g / m ² , a yarn density of 11 × 3/25 mm (same for vertical and horizontal), and a thickness of 0.42 mm. The opening ratio of the prepared deodorizing sheet was about 15%.

The deodorizing sheet prepared so as to have the same configuration as in FIG. 4 was cut into a size of 21 Cm × 2.5 Cm, and 49 sheets were stacked vertically in parallel so that the stacking interval was 8.8 mm. Two similar laminates were prepared and installed so as to sandwich the lamp. The total number of filters is 98. At this time, the inclination angle θ between the lamp and the deodorizing sheet was set to about 70 °, and the lamp was disposed in the direction in which the end face near the lamp became the lowest position of the deodorizing sheet. Six lamps were arranged at intervals of 3.5 Cm. The cross-sectional area of the air passage surrounded by the top plate and the side plate was set to 47 Cm × 20 Cm. The total surface area of the deodorizing sheet calculated without considering the aperture ratio of the filter and excluding the bonded portion of the filter is about 4900 Cm ² . A fan was connected to the downstream side of the prepared deodorizing filter to obtain a photocatalyst deodorizing machine of Example 1 of the present invention.

After the deodorizing sheet was prepared by the same method as described above, the deodorizing sheet was placed in the air path so that the deodorizing sheet closed the air path (inclination angle θ = 0 °) and the cross-sectional area was 47 Cm × 20 Cm. The total surface area of the deodorizing sheet is about 940 Cm ² . Six lamps were disposed on the downstream side of the filter, and a fan was further connected on the downstream side to obtain a photocatalyst deodorizer of Comparative Example 1 of the present invention.

After the deodorizing sheet was prepared by the same method as described above, the deodorizing sheet was placed in the air path so that the deodorizing sheet closed the air path and the cross-sectional area was 47 Cm × 20 Cm, and four sheets were stacked. The total surface area of the deodorizing sheet is about 3760Cm ^2. Six lamps were arranged on the downstream side of the filter, and a fan was connected on the downstream side to obtain a photocatalyst deodorizer of Comparative Example 2 of the present invention.

FIG. 11 shows the relationship between the wind speed and pressure loss of the produced photocatalyst deodorizer. The photocatalytic deodorizer of Example 1 of the present invention had a low pressure loss, and the pressure loss at a surface wind speed of 1 m / s was 10.8 PA. On the other hand, in the photocatalyst deodorizer of Comparative Example 1, the pressure loss at the surface wind speed of 1 m / s was 19.3 PA, and in the photocatalyst deodorizer of Comparative Example 2, the pressure loss was 46.2 PA, compared with the photocatalyst deodorizer of Example 1. It was found that the wind was difficult to pass through the air passage. Comparing the total surface area of the filters, the surface area of the photocatalyst deodorizer of the present invention is 4900 Cm ^2, which is about 5.2 times that of Comparative Example 1 and 1.3 times that of Comparative Example 2. From these things, by making the inclination | tilt angle of a deodorizing sheet into 0 degree or more like Example 1, the total surface area of a deodorizing sheet can be increased, reducing the pressure loss of a deodorizing filter, and deodorizing efficiency is good. It was found that a photocatalyst deodorization apparatus can be obtained.

(Declination angle of deodorizing sheet and deodorizing performance)
The materials were weighed and mixed so that the powdered titanium oxide was 8 wt%, the high silica zeolite as an adsorbent was 20 wt%, the colloidal silica was 60 wt%, and the purified water was 12 w%. A slurry was prepared by dispersing and mixing. The resulting slurry is dipped in a glass fiber fabric with an aperture ratio of 29%, impregnated with a photocatalyst, air blown to remove excess liquid, and then dried in a 120 ° C. dryer for 30 minutes to create a deodorizing sheet containing the photocatalyst. did.

Glass fiber fabrics that serve as the base material for deodorizing sheets are: (1) Glass fiber fabrics with openings (net-like sheets) (2) Glass fibers without openings (plate-like sheets)
Was used.

(1) Glass fiber fabric with openings (network sheet)
An imitation weave with a basis weight of 354 g / m ² , a yarn density of 11 × 3/25 mm (same as vertical and horizontal), and a thickness of 0.42 mm was used. The supported amount of the catalyst, the adsorbent and the binder was 500 g / m ² . The opening ratio of the prepared deodorizing sheet was about 15%.

(2) Glass fiber woven fabric (plate-like sheet) without opening
A twill weave with a basis weight of 408 g / m ² , a yarn density of 42/25 mm (vertical), 31/25 mm (horizontal), and a thickness of 0.45 mm was used. The supported amount of the catalyst, the adsorbent and the binder was 500 g / m ² . The opening ratio of the prepared deodorizing sheet is 0%.

The prepared deodorizing sheet was cut into a size of 18 Cm × 8 Cm and further divided into 9 sheets of 2 Cm × 8 Cm. Place the deodorizing sheet obtained by laminating at equal intervals in any inclination angle θ horizontally, a cold cathode tube as a light source, deodorizing sheet, in order by fans, were placed in an acrylic box having an inner volume of 1 m ^3. The interval between the proximity surface of the lamp and the deodorizing sheet was adjusted so that the average ultraviolet intensity of the deodorizing sheet adjacent surface was ² mW / Cm ² . The acrylic box was sealed and 10 ppm acetaldehyde gas was introduced. The air in the box was sampled, and the acetaldehyde concentration was measured over time by gas chromatography.

  FIG. 12 shows the acetaldehyde deodorization rate when the inclination angle is changed. The vertical axis represents the deodorization rate obtained from the acetaldehyde concentration after 120 minutes, and the horizontal axis represents the longitudinal direction of the lamp and the inclination angle θ formed by the deodorizing sheet. (1) In the case of the net-like sheet, the deodorization rate improved with an increase in the tilt angle in the range of 0 ° to 60 °, and the deodorization rate decreased in the range of 60 ° to 90 °. The deodorization rate is influenced by the light receiving intensity of the deodorization sheet, the contact efficiency between the odor and the deodorization sheet, the air flow state, the passing air volume, etc., but it was found that the shape of the present invention has an optimum value near an inclination angle of about 60 °. . On the other hand, in the case of (2) a plate-like sheet, the deodorization rate improved with an increase in the inclination angle in the range of 30 ° to 90 °. An inclination angle of 0 ° was not measured because the air passage was blocked and the air could not pass. The most effective deodorizing efficiency in the above test was (1) a configuration in which a reticulated sheet was used and the inclination angle was 60 °. Based on the deodorizing performance of the plate-like sheet when θ = 90 °, it was found that the deodorizing sheet should be inclined so that the inclination angle θ of the mesh sheet is in the range of 40 <θ <78.

(Deodorization and antibacterial performance of photocatalyst)
The following experiment was conducted to investigate the relationship between the deodorization performance by the photocatalyst and the UV intensity. A photocatalytic filter containing titanium oxide as a photocatalyst and a lamp were placed in a 3 L test box, shielded from external light, and then acetaldehyde gas was introduced so that the initial concentration was 100 ppm. After 120 minutes, the lamp was turned on and the photocatalytic filter was irradiated with light. Lamps used black light and fluorescent lamp, respectively, ultraviolet intensity former 1 mW / Cm ^2, the latter was 0.01 mW / Cm ^2. The gas concentration in the test box was measured by gas chromatography. The results are shown in FIG. Without the photocatalytic filter, the gas concentration gradually decreased due to adsorption to the test box wall and diffusion outside the container. In the case with a photocatalytic filter, a decrease in gas concentration due to adsorption was observed even in the dark. After 120 minutes, when the light was irradiated at an ultraviolet intensity of 1 mW / Cm ² , the gas concentration fell below the detection limit in about 35 minutes, and it was found that gas decomposition by the photocatalyst occurred. On the other hand, decomposition of Likewise gas in the case of ultraviolet intensity 0.01 mW / Cm ² has occurred, decreased speed was moderate. From this, it was found that odor decomposition occurred in a shorter time when irradiated with strong ultraviolet rays.

In order to investigate the antibacterial action by the photocatalyst, the experiment was conducted according to the following procedure. Staphylococcus aureus (S.AurEus, NBRC.12732) prepared in a bouillon liquid medium diluted to 1/500 to add a small amount of nutrients to a density of 10 ⁵ / ml was collected in a 5 cm square dust carrying a photocatalyst. The filter was inoculated with 0.15 ml. Thereafter, ultraviolet rays were irradiated under each condition, and changes in the number of bacteria after 0, 8, and 24 hours were examined. The number of bacteria was measured by culturing at 37 ° C. for 24 hours using a standard agar medium. The results are shown in FIG. When the UV intensity was zero, the number of bacteria increased slightly. On the other hand, the number of bacteria decreased when irradiated with ultraviolet light, and it was found that the longer the irradiation time and the stronger the ultraviolet light intensity, the stronger the antibacterial effect. Further, it was found that the ultraviolet intensity irradiated to the photocatalyst layer may be 0.001 mW / Cm ² or more. By using this amount of ultraviolet light, not only an antibacterial effect can be obtained, but also an effect that deterioration of the main body resin due to ultraviolet light can be reduced can be obtained.

(Antimicrobial performance by light)
The photocatalyst deodorizer was operated for 3.5 months indoors. Countless dust adhered to the dust collection filter. After collecting the dust and washing it with the SCDLP medium, the collected liquid was cultured in a standard agar medium. The number of viable bacteria contained in the dust was 6.0 × 10 ² CFu / mg.

The collected dust was irradiated with light from a germicidal lamp (center wavelength 254 nm) and black light (center wavelength 365 nm, 1 mW / Cm ² ) for 18 hours. After irradiation, the number of bacteria was measured in the same procedure. When irradiated with a germicidal lamp, the viable cell count was 7.5 × 10 ¹ CFu / mg, and the germicidal rate was 88%. In the sample irradiated with black light, the viable cell count was 5.3 × 10 ² CFu / mg, and the bactericidal rate was 13%. By irradiating with light, it was found that bacteria attached to the dust collecting filter can be reduced, and in particular, the bactericidal effect of the germicidal lamp is high.

The black light was irradiated for a long time by reducing the intensity of ultraviolet rays. The collected dust was irradiated with black light (center wavelength 365 nm, 0.5 mW / Cm ² ) for 10 days, and the number of viable bacteria was measured in the same procedure. The results are shown in FIG. The number of bacteria decreased with time, and the sterilization rate after 10 days was 94%. It was found that even with weak ultraviolet rays, the bactericidal action works when irradiated for a long time.

The collected dust was irradiated with light of black light (center wavelength 365 nm), and the number of viable bacteria was measured in the same procedure. The ultraviolet light intensity of the black light was 0 to 2.5 mW / Cm ² and the irradiation time was 24 hours. The results are shown in FIG. It was found that the sterilization rate improved with an increase in ultraviolet intensity.

  Reduced pressure loss during ventilation of the deodorization device, can efficiently irradiate light to the photocatalyst, can provide a deodorizer with excellent deodorization performance, deodorization device, air purifier, air conditioner with deodorization function, etc. It can be applied to any use.

Schematic sectional view showing the photocatalytic deodorizer of Embodiment 1 of the present invention Enlarged view of the photocatalyst deodorizer lamp and deodorizing filter (side view) Enlarged view of the photocatalyst deodorizer lamp and deodorizing filter (plan view) The perspective view which shows the deodorizing part of the photocatalyst deodorizing machine of Embodiment 2 of this invention. The perspective view which cut | disconnected the photocatalyst deodorizing machine by D-D 'plane Parts diagram of the side plate of the photocatalyst deodorizer Parts diagram of the side plate of the photocatalyst deodorizer Exploded view of the photocatalyst deodorizer Exploded view of the photocatalyst deodorizer Schematic sectional view showing a photocatalyst deodorizer according to Embodiment 2 of the present invention. The graph which shows the relationship between the wind speed of the photocatalyst deodorizing machine of Example 1, and a pressure loss. The graph which shows the relationship between the inclination-angle of Example 2, and an acetaldehyde deodorizing rate The graph which shows the deodorizing effect of the photocatalyst filter of this invention The graph which shows the bactericidal effect of the photocatalyst of this invention The graph which shows the relationship between the irradiation time of the lamp | ramp of this invention, and a residual bacteria rate The graph which shows the relationship between the ultraviolet-ray intensity of the lamp | ramp of this invention, and a residual bacteria rate Schematic perspective view showing a conventional deodorizing apparatus Schematic perspective view showing a conventional deodorizing apparatus

DESCRIPTION OF SYMBOLS 1 Main body 2 Lamp 3 Deodorizing sheet 4 Deodorizing filter 5 Fan 6 Fiber 7 Top plate 8 Side plate 9 Spacer 10 Notch part 11 1st dust collection filter 12 2nd dust collection filter 13 Reflecting plate 14 Mountain part 15 Valley part 101 Adsorbent 102 Photocatalyst 103 Honeycomb hole 104 Lamp 201 Deodorizing unit 202 Ultraviolet lamp 203 Plate-shaped deodorizing body

Claims (26)

A main body having a suction port and a blow-out port, a rod-shaped photocatalyst excitation light source, a deodorizing filter in which a plurality of deodorizing sheets containing a photocatalyst are stacked at intervals, and a collection carrying an antibacterial metal and / or photocatalyst. A photocatalyst deodorizer comprising a dust filter and a blowing means, wherein the deodorization filter and the dust collection filter are disposed at a position where the light emitted from the excitation light source can be received, and the longitudinal direction of the rod-shaped excitation light source The net-like deodorizing sheet is laminated so that the inclination angle θ of the deodorizing sheet with respect to the direction is in the range of 0 <θ <90, and the air sent by the blowing means is deodorized by passing through the deodorizing filter. A photocatalyst deodorizing machine. 2. The photocatalytic deodorizer according to claim 1, wherein the net-like deodorizing sheet is inclined so that the inclination angle [theta] of the deodorizing sheet is in a range of 40 <[theta] <78. The photocatalyst deodorizer according to claim 1 or 2, wherein an inclination angle and a stacking interval of the deodorization filter are adjusted so that light irradiated in a vertical direction from the excitation light source is shielded by the deodorization filter. The photocatalyst deodorizer according to any one of claims 1 to 3, wherein a plurality of deodorizing sheets are arranged so that the distance between the adjacent end surfaces of the excitation light source and the deodorizing sheet is the same. The photocatalyst deodorizer according to any one of claims 1 to 4, wherein the proximity end surface of the excitation light source and the deodorizing sheet is inclined so as to be at the lowest position of the deodorizing sheet. The photocatalyst deodorizer according to any one of claims 1 to 5, wherein deodorizing sheets are laminated at equal intervals. 7. The photocatalytic deodorizer according to claim 1, wherein the deodorizing sheet is supported by a spacer. The photocatalyst deodorizer according to claim 7, wherein the spacer has a light reflecting action. The photocatalyst deodorizer according to any one of claims 1 to 8, wherein a plurality of spacers are provided at intervals of 70 mm or less. The photocatalyst deodorizer according to any one of claims 1 to 9, wherein the deodorization sheet is a glass fiber fabric carrying a photocatalyst. The photocatalyst deodorizer according to claim 10, wherein the glass fiber fabric is formed by a fiber bundle obtained by bundling a plurality of short fiber glasses. The photocatalyst deodorizer according to claim 10 or 11, wherein the photocatalyst is fixed to a glass fiber fabric using a light-transmitting binder. 12. photocatalytic deodorizer main component of the light transparent binder, characterized in that a SiO _2. The photocatalyst deodorizer according to any one of claims 1 to 13, wherein the deodorizing sheet contains an adsorbent. The photocatalyst deodorizer according to any one of claims 1 to 14, wherein a protective cover is provided on a lighting tube of the excitation light source. 16. The photocatalyst deodorizer according to any one of claims 1 to 15, wherein two sets of deodorizing filters are arranged so as to be symmetrical with the excitation light source interposed therebetween. The photocatalyst deodorizer according to any one of claims 1 to 16, wherein the deodorization sheet of the deodorization filter is detachable from a surface not in contact with the excitation light source. The photocatalyst deodorizer according to any one of claims 1 to 17, wherein an antibacterial metal and / or photocatalyst is supported only on a surface of the dust collecting filter that can receive light. The photocatalyst deodorizer according to any one of claims 1 to 18, further comprising a dust collection filter at a position where the ultraviolet ray intensity of the light emitted from the excitation light source is 0.001 mW / Cm ² or more. The photocatalyst deodorizer according to any one of claims 1 to 17, wherein the light irradiated from the excitation light source has a bactericidal action. The photocatalyst deodorizer according to any one of claims 1 to 20, further comprising an ozonolysis means between the excitation light source and the outlet. The photocatalyst deodorizer according to any one of claims 1 to 21, wherein a material of the dust collecting filter is a metal or an inorganic compound. The photocatalyst deodorizer according to any one of claims 1 to 22, wherein the dust collection filter is obtained by pleating metal or an inorganic compound, and the folds of the pleating process are arranged in the longitudinal direction of the excitation light source. . The photocatalyst deodorizer according to any one of claims 1 to 23, further comprising a reflection plate that reflects light emitted from the excitation light source, and arranged in the order of the excitation light source, the deodorization sheet, the dust collection filter, and the reflection plate. The photocatalyst deodorizer according to claim 24, wherein a suction port is provided between the reflector and the dust collecting filter. The photocatalyst deodorizer according to any one of claims 1 to 25, wherein the excitation light source is arranged so as not to be directly viewed from the outside of the main body.

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