TW483775B - Exhaust cleaning device and use thereof - Google Patents

Abstract

The present invention provides an exhaust cleaning device that removes contaminants and odorous materials from the exhaust. The present invention further provides an exhaust cleaning cabinet and a cooking device, of which may be include within the exhaust cleaning device, and a cooking system including the cooking device. One embodiment of the exhaust cleaning device provided by the present invention includes a pre-treatment section 117 and a photo treatment section 119, which has a photocatalyst filter 62. The photo treatment section 119 is placed in a lower part of an exhaust path than the pro-treatment section 117. The exhaust cleaning device may be placed, for example, in an exhaust duct that extends from a kitchen. The pre-treatment section 117 preferably includes a dust collector 50 that can trap smoke particles and/or an oil removal filter 20 which can trap oily components. The exhaust cleaning cabinet of the present invention includes the exhaust cleaning device placed in a cabinet, which forms an exhaust path therein. The cooking device of the present invention includes the exhaust cleaning device placed in a main body of the cooking device, which includes a cooking part and forms an exhaust path therein. The cooking system of the present invention includes a plurality of cooking devices and a main duct, which is connected to an exhaust vent of each cooking device.

Description

483775 V. Description of the invention (1) TECHNICAL FIELD The present invention relates to an exhaust gas purification device for purifying exhaust gas. In particular, it relates to an exhaust gas purifying device for purifying exhaust gas containing polluting substances such as grease and odorous components. The present invention also relates to an exhaust purification box and a conditioner provided with the exhaust purification device. Furthermore, the present invention relates to a conditioning system including the conditioner. Technical background During the conditioning of food, exhaust gas containing pollutants such as grease and odorous components is generated. The purification treatment device for removing pollutants and odor components from exhaust gas is an exhaust gas purification device shown in Shikai Hei 1-97136. The exhaust purification device is equipped with a fan Λ filter in the exhaust pipe. The exhaust gas is first attracted by the fan, and then the filter catches the pollutants in the exhaust gas. Also, Japanese Unexamined Patent Publication No. 6-190223, Japanese Unexamined Patent Publication No. 9-141024, and Japanese Unexamined Patent Publication No. 1-224025 also disclose a filter for capturing pollutants in exhaust gas, and Japanese Unexamined Patent Publication No. 7-24423 The gazette discloses an exhaust gas purification device capable of rotating a cylindrical filter while passing exhaust gas through the rotating filter to capture pollutants. However, these exhaust gas purification devices have the disadvantage that they cannot completely remove the odorous components contained in the exhaust gas. In addition, Japanese Unexamined Patent Publication No. 11-207136 discloses a filter having a photocatalyst (photocatalyst filter) irradiated with ultraviolet rays, and an exhaust gas that can decompose the oily and odorous components contained in the exhaust gas by the action of the photocatalyst Purification device. A filter having a photocatalyst is also disclosed in JP 2001-38218. However, because the exhaust gas containing many pollutants passes through 483775

V. Description of the invention (2) When the above photocatalyst filter is used, the captured pollutants (grease, dust, tar-like substances, etc.) will cover the surface of the photocatalyst filter. As a result, the photocatalyst cannot be exposed to ultraviolet rays and cannot Play the role of photocatalyst. DISCLOSURE OF THE INVENTION The object of the present invention is to provide an exhaust gas purifying device capable of purifying exhaust gas containing pollution substances (such as oil and fat components) and odor components generated by conditioning and the like. Another object of the present invention is to provide an exhaust purification box provided with the exhaust purification device. Another object of the present invention is to provide a conditioner including the exhaust purification device. Furthermore, another object of the present invention is to provide a conditioning system including the conditioner. The exhaust gas purification device provided according to the present invention is provided in the exhaust gas flow path and is provided with: a pre-treatment section for capturing pollutants in the exhaust gas; and a light processing section having Photocatalyst filter. The light processing section is arranged on the downstream side of the preprocessing section with respect to the flow direction of the exhaust gas flowing through the exhaust path. An exhaust purification device having this structure can reduce the supply of photocatalysts because at least a part of the pollutants (non-volatile components such as oil particles, smoke particles, and dust) in the exhaust gas has been captured in the pre-processing section. The quality of the pollutants in the exhaust of the filter (the exhaust that has been processed in the pre-treatment section), so 'can solve or reduce the problem of the photocatalyst filter's low function due to the adhesion of pollutants. Furthermore, the photocatalyst filter in the exhaust gas purification device of the present invention is provided with a ceramic substrate and a photocatalyst held on the ceramic substrate. The ceramic matrix is composed of a ceramic porous body having a three-dimensional network structure and ceramic particles held in the ceramic. 5 、 Explanation (3) Porous body. Here, the average particle diameter of the ceramic particles is 1 μm or more and 100 μm or less. The average diameter of the bone structure of the ceramic porous body in the photocatalyst filter is 100 μm or more and 100 μm or less. Furthermore, a photocatalyst filter that satisfies at least one of the following is preferred, namely: (1) a void ratio of 65% to 95%; (2) a bulk density (u5g / cm3 or more, 0.60g / cm3 or less); and (3) The number of cells is more than 10/25111111 and less than 30 / 25mm. The pre-processing part in the exhaust purification device of the present invention is provided with a particle (oil particle, smoke particle) for capturing the exhaust gas And dust, etc.). The particle transition device can be a dust collector for capturing smoke particles in the exhaust gas and a degreasing filter for capturing grease components (oil particles, etc.) in the exhaust gas. The degreasing filter should be capable of removing 70% by weight or more (more than 90% by weight, and more preferably 95% by weight) of the grease component (oil fume) in the exhaust gas. The ratio of the removed grease component is called the "oil removal rate" of the degreasing filter. When the pretreatment section has a plurality of degreasing filters (such as a plurality of plate-shaped degreasing filters), these degreasing The total proportion of grease components removed by the filter is also the aforementioned oil removal rate According to another embodiment of the exhaust gas purification device of the present invention, the aforementioned pre-processing section is provided with a deoiling filter for capturing oil and fat components in the exhaust gas and a dust collector for capturing smoke particles in the exhaust gas. Here, the dust collector It is arranged on the downstream side of the degreasing filter. In addition, the cross-sectional area of the exhaust passage on the inflow side where the degreasing filter, dust collector and photocatalyst filter are provided is preferably in accordance with the degreasing filter. 5. Dust collector and photocatalyst filter Fifth, description of the invention (4) The order is gradually increasing. Another exhaust gas purification device provided according to the present invention is provided outside of any of the above-mentioned exhaust gas purification devices of the present invention, and further includes a device having Box for suction port and exhaust port. Another exhaust purification device provided according to the present invention is outside of any of the exhaust purification devices of the present invention described above, and further has a conditioner body. The conditioner system It includes a conditioning section for heating and conditioning the object to be conditioned, a suction port for sucking the exhaust gas from the conditioning section, an exhaust port for discharging the purified exhaust gas, and the An exhaust path from the air inlet to the exhaust port. Any exhaust gas purification device of the present invention should be provided with a light source for irradiating light to the photocatalyst filter in the light processing section. Also, in the exhaust path An ozone supply device for supplying ozone should be provided. The exhaust purification box provided according to the present invention is a box provided with an intake port, an exhaust port, and an exhaust passage from the intake port to the exhaust port. One of the exhaust purification devices of the present invention is accommodated in the body. The conditioner provided according to the present invention is provided with a conditioning unit for heating conditioning of the object to be treated, and an exhaust unit for generating the conditioning unit. The suction port of the air suction, the exhaust port for exhausting the purified exhaust gas, and the conditioner body of the exhaust passage from the suction port to the exhaust port contain any row of the present invention. Gas purifiers. Furthermore, according to the conditioning system provided by the present invention, there are a plurality of conditioners of the present invention and a supervisor 0 connected to the exhaust port of each of the conditioners. Brief description of the invention (5) Figure 1 An explanatory view of a first embodiment of a mode display exhaust purification system. Fig. 2 is an explanatory diagram of a display conditioning room in a mode. Fig. 3 is a sectional view showing a light processing section in the exhaust purification system of the first embodiment in a mode. FIG. 4 is a front view showing a photocatalyst unit. FIG. 5 is a schematic diagram of the direction of arrow V in FIG. 4. FIG. 6 is a perspective view showing a photocatalyst filter in a mode. Fig. 7 is an explanatory diagram showing the structure of a ceramic substrate. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7. Fig. 9 is a sectional view showing another structure of the light processing section in the exhaust purification system of the first embodiment in a mode. Fig. 10 is a characteristic diagram showing the relationship between the average diameter of the skeleton structure and the pressure loss. FIG. 11 is a characteristic diagram showing acetaldehyde decomposition energy of a photocatalyst filter. Fig. 12 is a sectional view showing an exhaust purification box according to a third embodiment in a mode. FIG. 13 is a schematic view of the arrow X direction in FIG. 12. FIG. 14 is a schematic diagram of the direction of arrow xiv in FIG. 12. Fig. 15 is a sectional view showing a conditioner of a fourth embodiment in a mode. Fig. 16 is a sectional view of a conditioner of a conditioning system of the fifth embodiment of the mode 16; Fig. 17 shows the mode of conditioning of the conditioning system of the sixth embodiment. 483775 V. Description of the invention (6) A sectional view of the device. Best Mode for Carrying Out the Invention A best mode for carrying out the invention will be described below.

The photocatalyst filter used in the exhaust gas purification device of the present invention is preferably a ceramic substrate having ceramic particles held on the surface of the porous ceramic body. By holding the ceramic particles, the surface of the ceramic porous body can be uneven. By the anchor effect produced by the concave and convex, the photocatalyst can be stabilized and held on the ceramic substrate. In addition, since the unevenness increases the surface area of the ceramic porous body, it is possible to maintain a large amount of photocatalyst per unit volume. Furthermore, the unevenness can increase the surface area per unit volume of the photocatalyst. Due to these effects, the contact between the exhaust gas and the photocatalyst can be increased, so the exhaust gas can be more efficiently purified.

Here, the ceramic particles preferably have an average particle size of 1 μm or more and 100 μm or less, and more preferably an average particle size of 20 μm or more and 50 μm or less. When the average particle diameter of the ceramic particles is less than 1 µm, the effect of imparting unevenness to the surface of the ceramic porous body is deteriorated. On the other hand, when the average particle diameter of the ceramic particles is more than 100 μm, it is difficult to stably hold the ceramic particles on the surface of the ceramic porous body. The ceramic porous body is preferably composed of a skeleton structure with a diameter of 100 μm or more and 1,000 μm or less. The average diameter of the β-skeleton structure is 100 μπ1 or more (preferably above). H is a porous body and has appropriate mechanical strength. Good performance and usability. The average diameter of the skeleton structure is larger than 100 μm μ _ ′, which will cause the light transmittance of the photocatalyst filter having the ceramic porous body to be low, and cannot fully utilize the photocatalyst held inside the photocatalyst filter. X, the pressure loss when the exhaust gas passes through the photocatalyst filter will also be 9 483775 5. The invention description (7) is too large. Furthermore, the photocatalyst filter should satisfy at least one of the following three conditions, namely: (1) the porosity is 65% or more and 95% or less; (2) the bulk density is 0.15g / cm3 or more and 0.60g / cm3 or less; And (3) the unit (ceii) number of 10 / 25mm or more, 30 / 25mm or less. Photocatalyst filters with a porosity of 95% or less, a bulk density of 0.15 g / cm3 or more, or 30 cells / 25 mm or less have appropriate mechanical strength, and therefore have good manufacturability and usability. A photocatalyst filter with a porosity of less than 65%, a bulk density of 0.60g / cm3 or more, or a cell number of less than 10 / 25mm may cause excessive pressure loss when the exhaust gas passes. In addition, the photocatalyst filter tends to reduce the amount of light reaching the inside thereof. Furthermore, the contact ratio of odorous components (mainly gaseous organic compounds) and the like with the photocatalyst in the exhaust gas becomes low, so that the photocatalyst processing efficiency is low. When the photocatalyst filter has a thickness of 5 mm, it is preferable to have a light transmittance of 10% or more and 50% or less (preferably 20% or more and 50% or less). A photocatalyst filter having a light transmittance of 10% or more can effectively penetrate the photocatalyst held in the photocatalyst filter because it allows light to penetrate into the interior '. The light transmittance in the above range can be achieved by satisfying one or more of the above three conditions (preferably more than two, and more preferably all satisfied). The photocatalyst filter can be obtained by the following manufacturing method, which includes the following steps: (a) an impregnation step in which an organic porous body having a three-dimensional network structure is impregnated with a slurry containing a ceramic fine powder and a bonding material (B) an attaching step, which attaches the ceramic particles to the aforementioned dried slurry 10 483775

V. Description of the invention (s), (c) The step of preparing the ceramic substrate is to burn out the organic porous body by heating to make the ceramic substrate containing the ceramic particles in the ceramic porous body; (d) the step of forming the coating, A photocatalyst layer containing a photocatalyst is formed on the surface of the ceramic substrate. The following is an example of a more specific manufacturing method. First, ceramic fine powder (one or two types of fine powder composed of alumina, silica, and mullite can be used) and a binder (dextrin, methyl cellulose, Either an organic binder such as polyvinyl alcohol or an inorganic binder such as clay or sodium silicate), after adding appropriate water, mixing and stirring, a slurry for forming a porous ceramic body is prepared. Then, an organic porous body (foamed urethane resin, etc.) having a three-dimensional network structure is impregnated into the aforementioned slurry. Next, on the organic porous body in which the slurry is in a wet state, sprinkle ceramic particles (one or two types of particles composed of alumina, silicon dioxide, mullite, etc.) can be used. Thereby, ceramic particles are adhered to the undried slurry. After that, the slurry is dried and fired to burn off the organic porous body, and the ceramic fine powder and the ceramic particles constituting the slurry are sintered into one body. Thus, as shown in Figs. 7 and 8, a ceramic porous body 71 having a ceramic fine powder sintered and a ceramic base body 73 of ceramic particles 72 held (sintered) integrally on its surface are formed. The burnt portion of the organic porous body is as shown in Fig. 8 to form burn marks 78. As shown in Figs. Then, a photocatalyst slurry containing an organic or inorganic binder containing a photocatalyst as a main component is prepared. The ceramic substrate 73 is impregnated in the photocatalyst material, dried, and fired to form light covering the surface of the ceramic substrate 73. 11 483775 V. Description of the invention (9) Catalyst layer 76 (see Fig. 8). In this way, a photocatalyst filter 62 is obtained. As the photocatalyst system, one kind or two or more kinds selected from titanium oxide, tungsten oxide, zinc oxide, vanadium oxide, and zirconia can be used. A typical system uses titanium oxide. A photocatalyst filter with a light source facing opposite sides should be arranged in the light processing section. With this structure, the light emitted from the light source to the four sides can be effectively utilized. As the light source, it is desirable to use light having a wavelength that allows the photocatalyst to fully function according to the type of the photocatalyst held in the photocatalyst filter. Typically, ultraviolet lamps such as so-called black light fluorescent lamps, ultra-high pressure mercury lamps, and low-pressure mercury lamps can be used. When the photocatalyst is titanium oxide, it is particularly preferable to use an ultraviolet lamp that can irradiate ultraviolet rays having a wavelength of 300 nm to 420 nm (such as ultraviolet rays having peaks of 360 nm to 380 nm). The exhaust gas purification device of the present invention may further include an ozone supplier for supplying ozone in the exhaust gas flow path. In this way, in addition to the photocatalyst effect, it also has a strong oxidation effect due to ozone, and the odor components and / or pollutants in the exhaust gas can be further purified. The ozone supply unit can use an ultraviolet lamp (such as a low-pressure mercury lamp) that irradiates light with a wavelength of approximately 185 nm. Ozone is generated by irradiating the oxygen in the exhaust path with light having a wavelength of slightly 185 nm. The ultraviolet lamp is preferably shared with a light source that irradiates light to a photocatalyst filter. The dust collector in the exhaust gas purification device of the present invention can be used, for example, an electric dust collector, a filter dust collector, a sonic dust collector, a centrifugal dust collector, and the like. Typically, an electric dust collector is used. This dust collector should be installed under the deoiling filter 12 483775 V. Description of the invention (ίο) Downstream. The degreasing filter used in the exhaust gas purification device of the present invention can be a general degreasing filter such as a fat filter, a fat separator, and a fat extractor. In the degreasing filter, the oil removal rate is preferably 70% by weight or more, more preferably 90% by weight or more, and more preferably 95% by weight or more. The degreasing filter should be composed of non-combustible materials such as metal fibers (such as aluminum fibers) or non-combustible materials such as glass fibers. Degreasing filters made of metal wire such as steel wool (such as stainless steel wool) or metal fibers such as metal ribbons can be used. This degreasing filter can be arranged between the distances passing through the pre-treatment section, so that the exhaust gas passes through the filter constituent material multiple times (that is, the flow of the exhaust gas is blocked at a plurality of places by the filter constituent material) By. For example, the deoiling filter has a plate shape, and the plurality of plate filters are provided so as to block the flow of exhaust gas, respectively. Among the constituent components of the exhaust gas purification device of the present invention, for dust collectors (especially electric dust collectors) and photocatalysts, the slower passage of exhaust gas is more advantageous for improving purification efficiency. The flow velocity of the exhaust gas can be adjusted by, for example, adjusting the opening area of the exhaust flow path (the cross-sectional area of the exhaust passage). Specifically, the cross-sectional area of the exhaust passage on the upstream side (inflow side) of the degreasing filter is reduced to increase the flow rate, and the cross-sectional area on the upstream side of the dust collector is increased to increase the flow rate. slow. On the upstream side of the photocatalyst filter, it is desirable to further increase the cross-sectional area and to disperse (diffuse) the exhaust gas. With this structure, the exhaust gas can be supplied to the degreasing filter, dust collector and photocatalyst filter at an appropriate flow rate, thereby effectively removing various pollutants. 13 483775 V. Description of the invention (11 In addition, the method of adjusting the exhaust flow rate is in addition to the above-mentioned method of changing the cross-sectional area of the exhaust passage, and the exhaust flow can be changed by setting a baffle in the exhaust passage. In order to make the flow rate slower, or a fan is provided on the upstream side of the deoiling filter to speed up the flow rate of the exhaust gas supplied to the deoiling filter. The exhaust gas purification device of the present invention may further be provided with a suction port. 、 Exhaust port and the box formed by the exhaust path from the suction port to the exhaust port. The exhaust purification device (exhaust purification box) with this box can be easily moved to any place for use. Therefore, Improved the versatility of the exhaust purification device. Also, this exhaust purification device can not only be used for purification of exhaust gas, but also be used as an air cleaner for home or car use. At this time, it should be installed in the lower part of the box The suction port is provided with an exhaust port 'at the top to form an exhaust path through which the exhaust gas flows from the bottom to the top of the box. According to this structure, the pollutants (oil particles, etc.) in the exhaust gas are arranged below Go to the processing department before Therefore, even if the grease component captured by the pre-processing portion leaks, it is difficult to reach the light processing portion provided above. Therefore, the problem that the grease component is attached to the photocatalyst filter can be effectively suppressed. Also, the grease component is prevented from facing the light Other methods of immersing the processing unit include dividing the cabinet into a plurality of processing chambers, and installing each component (such as a degreasing filter, a dust collector, and a photocatalyst filter) in these processing chambers. If the pre-processing part and the light-processing part are properly separated, and the grease components captured in the pre-processing part can be prevented from infiltrating the light-processing part, an air inlet is formed on the upper part of the box, and an air outlet is formed on the lower part. Yes, and further, when the box is formed in a horizontally long shape, the pre-processing section and the light-processing section may be arranged in a horizontal direction. 14 483775

V. Description of the invention (12) This exhaust purification box can be connected with its exhaust port and the supervisor of the conditioning room, etc. This way, the exhaust passage formed in the box and the exhaust passage in the main pipe can be made. Connected. In this way, an exhaust purification system can be constructed by connecting one or more exhaust purification boxes to the main pipe. The exhaust gas purification device of the present invention may further include a conditioner body composed of a conditioning unit, an air inlet, an air outlet, and an exhaust passage from the air inlet to the air outlet. When the pre-processing section of such an exhaust gas purification device (conditioner) has a degreasing filter, it should not be arranged below the photocatalyst transition device, and the degreasing filter and the photocatalyst filter should be arranged horizontally staggered. In addition, the main body of the conditioner may be a mobile cooking table. By having such a cooking table, the exhaust gas purification device of the present invention can be configured as a smokeless conditioner. This conditioner (conditioner with exhaust purification device) can be connected to the main head of the conditioning room by connecting its exhaust port, and the same as the above-mentioned exhaust purification box, it is composed of one or a plurality of conditioners. Conditioning system. The following examples further illustrate the present invention. < First embodiment; Exhaust gas purification device (1) > This first embodiment is an example in which the exhaust gas purification device of the present invention is installed in an exhaust pipe from a conditioning room to the outside. As shown in FIG. 1 and FIG. 2, a conditioning room 105 is demarcated by the structure wall 104 of the building 101. An entrance 103 is formed on the structural wall 104. The conditioning room 105 is provided with a plurality of (such as 5) conditioning stations 106. Above each conditioning 106, a ventilation hood 111 (rangeh00 (0) is installed. Inside each ventilation hood 111, the opening is extended along the outer wall surface of the building 101. V. Description of the invention (13) To one end of the exhaust pipe 108 on the roof exhaust port 112. The exhaust purification device 107 is simply a pre-processing part 117 connected to one end of the exhaust pipe 108 and is provided in the exhaust pipe 108 It is composed of a light processing unit 119 near the other end. A fan 114 is provided between the pre-processing unit ip and the light processing unit 119. As soon as the fan 114 is turned on, as shown by the arrow in FIG. The exhaust gas flows through the pre-processing section η ?, the exhaust officer 108, and the light processing section 119, and then is discharged to the outside through the exhaust port 112. The degreasing filter 20 is arranged in the rigid processing section 117. Here The degreasing transition device 20 is a general fat filter, and has the ability to remove more than 70% by weight of the fat component in the exhaust gas. As shown in FIG. 3, the light processing unit 119 is provided with a plurality (here two) A photocatalyst unit 61 provided in the exhaust pipe 108. As shown in FIG. 4 and FIG. There are a plurality of (such as 12) photocatalyst filters, filters 62, and a light source 63 for irradiating light to the photocatalyst filters 62. The photocatalyst filters 62 are arranged opposite to each other with the light sources 63, and are integrally held on the frame 64 As shown in FIG. 6, the photocatalyst filter 62 is formed into a flat plate shape. As shown in FIG. 7, the photocatalyst filter 62 is provided with a ceramic substrate 73 and a photocatalyst layer 76 (see FIG. 6) covering the surface of the ceramic substrate 73. The photocatalyst layer 76 is mainly composed of titanium oxide as a photocatalyst. As shown in FIG. 7, the ceramic matrix 73 is a ceramic porous body 71 composed of a three-dimensional network structure skeleton structure 77 and held in the ceramic porous body. The surface of the body 71 is composed of a plurality of ceramic particles 72. The surface of the ceramic substrate 73 is maintained at 16 483775

V. Description of the Invention (14) The ceramic particles 72 of the ceramic porous body 71 form irregularities. For convenience of explanation, in the part of Fig. 7, the ceramic particles 72 are omitted, and the skeleton structure 77 of the ceramic porous body 71 is exposed. Fig. 8 is a sectional view taken along the line VIII-VIII in the state where the photocatalyst layer 76 is formed on the ceramic base 73 in Fig. 7. In the photocatalyst filter 62 used in this embodiment, the ceramic particles 72 are alumina particles having an average particle diameter of 22 μm. The average diameter of the skeleton structure 77 of the ceramic porous body 71 is 100 μm or more and 100 μm or less. The photocatalyst filter 62 has a porosity of 65% to 95%, a bulk density of 0.15 g / cm3 to 0.60 g / cm3, and a number of cells of 10 / 25mm to 30 / 25mm. Furthermore, the light transmittance of this photocatalyst filter 62 is 10% or more and 50% or less when the thickness is 5 mm. As shown in Figs. 4 and 5, the frame 64 is formed in a box shape by using a corrosion-resistant metal such as stainless steel, and has a pair of openings facing each other. Then, a plurality of (for example, six) photocatalyst filters 62 are juxtaposed on the same surface, and are held in a lattice-shaped frame body 68 to form a flat plate-shaped photocatalyst module 69. The openings provided on both sides of the frame 64 are respectively installed with two photocatalyst mold groups 69. The photocatalyst modules 69 are provided with a plurality of light sources 63 held in a frame 64 in parallel with each other. In the photocatalyst unit 61 having this structure, the photocatalyst filter 62 is exposed to the outside through the openings on both sides of the frame 64. The exhaust gas is passed through the photocatalyst unit 61 through the second-layer photocatalyst filter 62. In this embodiment, four ultraviolet lamps are used as the light source 63. It can also replace the integration with the photocatalyst filter 62 and the light source 63 17 483775 V. Photocatalyst unit 61 of the invention description (15), as shown in FIG. 9 As shown in the figure, the photocatalyst filter 62 and the light source 63 are respectively arranged in the exhaust pipe 108. The light source 63 is disposed between the Nimaki photocatalyst filters 62. Further, it is preferable that the light source 63 is disposed further downstream than the photocatalyst filter 62 on the downstream side with respect to the exhaust gas flow direction. The light source 63 may be disposed further upstream than the photocatalyst filter 62 on the upstream side. These light sources 63 arranged on the upstream side or the downstream side are suitable for the side which is not opposite to the photocatalyst filter 62, and a reflecting plate 79 is provided. The operation of the exhaust gas purification device 107 will be described below. As shown in FIG. 1, the conditioning in the conditioning room 105 causes exhaust gas containing pollutants and odorous components. These exhausts containing pollutants and odorous components are sucked into the oxygen exchange cover 111 by the drive of the fan 114, and first pass through the degreasing filter 20 provided in the pre-processing section 117. In this way, 70% by weight or more (preferably 90% by weight or more, and 95% by weight or more) of the grease component in the exhaust gas is removed. The exhaust gas passing through the pre-processing section 117 flows in the exhaust pipe 108 toward the light processing section 119 and passes through a photocatalyst filter 62 provided in the photocatalyst unit 61. The exhaust gas at this time is a non-linear passage, that is, a three-dimensional network structure that zigzags through the photocatalyst filter 62. Thereby, a small amount of pollutants remaining in the exhaust gas is captured by the photocatalyst filter 62. The odorous components remaining in the exhaust gas are brought into contact with the photocatalyst layer 76 formed on the surface of the photocatalyst filter 62 by the turbulence generated when the exhaust gas passes through. These pollutants and odorous components are decomposed by the photocatalyst of titanium oxide, which is the main component of the photocatalyst layer 76. 18 483775

V. Explanation of the Invention (16) That is, as soon as the titanium oxide is irradiated with the ultraviolet light emitted from the light source 63, the moisture (H20) attached to the surface of the photocatalyst layer 76 and the moisture in the exhaust gas will be oxidized to form a hydroxyl group (· 0H). Reduction of oxygen to generate peroxy ions (· 02〇. Since these hydroxyl groups and peroxy ions show strong oxidation, they can decompose pollutants (especially organic compounds) captured or contacted by the surface of the photocatalyst filter 62. Therefore The odor components or fine pollutants in the exhaust gas can be decomposed and removed from the exhaust gas by the action of photocatalyst. Then, the exhaust gas becomes clean air and is discharged to the outside through the exhaust port 112. < Second 2 Example; Exhaust gas purification test> An exhaust gas purification device 107 having the structure shown in the first embodiment is used to purify exhaust gas generated from a home cooking conditioning field. In the conditioning room 105 shown in Figs. 1 and 2, It is equipped with 5 deep-fryeres, 3 gas stoves, and 1 steamer. In this conditioning room 105, 10 hours of daily fry, dumplings, halogens and marinades are prepared and fish and shellfish are prepared. Then To exhaust net The device 107 purifies the exhaust gas generated by the aforementioned home cooking conditioning field at a rate of 2000 m3 / h and a flow rate of 0.76 m2 / s. Here, the degreasing filter 20 of the pre-processing section 117 uses Tortek Japan Corporation "Air-wonder" (trademark) manufactured by the company, and the photocatalyst unit 61 of the light processing unit 119 is shown in Figs. 4 and 5. Hold the frame 68, and then arrange it in two layers with a thickness of 38mm in the thickness direction (exhaust flow direction) to form a frame 64. The outer diameter of this photocatalyst unit 61 is 506mm horizontal, 444mm vertical, and 19 483775 thick Explanation (I?)

64mm. Each photocatalyst unit 61 is provided with four ultraviolet lamps as a light source 63. This ultraviolet lamp uses 6W invisible light with a lamp diameter of 6mm (manufactured by Noritatekanpnirimited (transliteration); trade name "HL lamp" 'wavelength 300 ~ 420nm, peak wavelength 360 ~ 380nm). The horizontal direction is connected to three lines, and two sets of photocatalyst units 61 are produced, and two layers are arranged in the exhaust pipe 108 with respect to the flow direction of the exhaust gas. Under these conditions, the exhaust gas is purified for 1 month and 4 months. After that, the odor measurement person performed a three-point comparison type odor bag method to measure the odor concentration of the exhaust gas discharged from the exhaust port of the exhaust pipe. In the purification process of the exhaust gas, the ultraviolet lamp is continuously turned on. For comparison, the odor concentration of the exhaust gas discharged from the exhaust port of the exhaust pipe before the installation of the exhaust purification device and the odor concentration of the garbage collection site where the garbage generated by the conditioning room is collected are measured. The results are shown in Table 1. Here, the relationship between the odor index Z and the odor concentration Y is Z = 1101 gY. Sample name (original odor) Before the installation of the device) Discharge ^ (1 month after the exhaust purification device is installed) Exhaust 0 (4 months after the exhaust purification device is installed)

98

730 As shown in Table 1, before the exhaust purification device is installed

V. Description of the invention (ι〇 Exhaust gas has the same high odor concentration as garbage dumps. The reason why the odor concentration of this exhaust gas is higher than that of cooking food (original odor) is that it was previously attached to The influence of pollutants and odor components in the exhaust pipe. On the other hand, after the exhaust purification device was installed for one month, the odor concentration was greatly reduced, and the exhaust odor was not felt at all functionally. The installation of the air purification device, the pollutants and odor components in the newly discharged exhaust gas are removed together with the old odor components attached to the exhaust pipe. Also, even if the exhaust gas purification device is installed 4 months later, Good results equivalent to or more than one month after installation were also obtained. ≪ Test Example 1 > The photocatalyst filter constituting the exhaust gas purification device of the first embodiment was used in a ceramic porous body having a three-dimensional network structure. Those who hold a ceramic substrate with ceramic particles and a photocatalyst on the ceramic substrate. Below, several samples are made to review the effect of using this shape of the ceramic substrate to form a photocatalyst filter. Appropriate size of ceramic particles. Each sample was prepared by the following method. First, in a ball mill tank of polyethylene with a capacity of 2 liters, 446.5 g of Taurman fine powder (alumina fine powder), talc I6.0 g, Wood flour clay 36.5g, water i55g, and dispersant 12.5g. Furthermore, put a 10mm diameter oxide ball into a ball mill tank to 1/3 of the ball mill tank, mix and stir for 5 hours. After that, add an organic binder 127.1 g ( Made by Daiichi Kogyo Pharmaceutical Co., Ltd .; trade name "celamo (transliteration) TB-01") into the aforementioned ball mill tank, and stirred for another 20 hours. In this way, a slurry for forming a porous ceramic body is prepared. After that, it will have three times An organic porous body with a net-like structure (here, 21 483775 V. Description of the Invention (19) Plate-shaped foamed urethane) is put into the slurry, and the slurry is impregnated. Then, the foamed urine is poured from the slurry. The alkane is taken out, and the remaining slurry is pushed out and removed by a roller. Then, the foamed urethane is sprinkled with ceramic particles (alumina particles) to adhere to the undried polymer. At this time, the foam is vibrated on one side. Urine burning side sprinkled with alumina particles This can prevent uneven adhesion of alumina particles and allow excess alumina particles to fall into the foamed urethane. After that, the foamed urethane with the slurry and alumina particles attached is dried at 70 ° C. 24 Hours, and then fired at 1600 ° C for 1 hour. By this firing, the foamed urethane is burned off, and at the same time, a ceramic matrix with alumina particles held in a three-dimensional network structure (sintered) is obtained. Besides changing the adhesion Except for the average particle size of the alumina particles on the un-dried slurry, various ceramic substrates were prepared in the same manner as described above. These ceramic substrates were impregnated with a photocatalyst slurry and then fired at 500 ° C. A photocatalyst layer for covering the surface of the ceramic substrate is burned onto the ceramic substrate. In addition, the photocatalyst paste is monodispersed with fine particles of anatase-type titanium oxide (photocatalyst) in an aqueous solvent, and is oxidized with dioxide. Silicon is a photocatalyst paste (made by Ishihara Industries, trade name "ST-K01") as an inorganic binder (20 wt% based on the paste). At this time, various samples (photocatalyst filters) of ceramic substrates having alumina particles (ceramic particles) having different average particle diameters were prepared. A sample body having a photocatalyst layer formed on the surface of a ceramic porous body (the alumina particle is not held here) was prepared in the same manner as above except that alumina particles were not used. Here, the photocatalyst maintained in each sample is obtained from the difference in mass between the ceramic substrate (ie, sample 22 without alumina particles 22 483775 V. Description of ceramic porous body in the body of the invention (20)) and the sample. The mass of the layer is multiplied by the content of the photocatalyst to obtain the retention of the photocatalyst. The external dimensions (volumes) of each sample were measured, and the mass of the photocatalyst held per unit volume of each sample was calculated from the amount of photocatalyst held and the volume of the sample. The volume density of each sample is calculated from the volume and mass of each sample. Furthermore, the specific surface area of each sample was measured by the BET (Brunauer-Emmett-Teller) 1-point method. Based on these values, the surface area per unit volume of each sample was calculated by the following calculation formula. (Surface area per 1 cm3 of the sample body) = (Specific surface area [m2 / g]) X (Bulk density [g / cm3]) The retention amount and surface area of the photocatalyst per unit volume of each sample body are shown in Table 2 ^ In addition, the following values are average values of the results of the measurement of six samples. Table 2 Average particle diameter of photocatalyst particles Photocatalyst retention surface area [μιη] [g / cm3] [m2 / cm3] 0.8 0.006 0.62 22 0.013 3.73 47 0.013 4.50 102 0.012 4.43 (without alumina particles) 0.006 0.61 As shown in Table 2 It shows that compared with a ceramic porous body, which has no alumina particles but is provided with a photocatalyst layer, it has an average particle size of 1 μm or more,

23 483775 V. Description of the invention (2l) Photocatalyst retention per unit volume and surface area of ceramic substrates with alumina particles below 100 μxη are provided with a photocatalyst layer. Further, after vibrating these samples, the surface was observed with a scanning electron microscope. As a result, it was confirmed that the samples having an average alumina particle size exceeding 100 µm had alumina particles falling off. In addition, a sample body having an average particle size of alumina particles held in the ceramic porous body of less than 1 μm has the effects of no photocatalyst retention and upward surface area. < Test Example 2 > Instead of the photocatalyst paste used in Test Example 1, a photocatalyst paste (made by Ishihara Industries, trade name "STS-01") containing no inorganic binder was used. The titanium oxide concentration of this photocatalyst paste is about 30%. As the ceramic particles, alumina particles having an average particle diameter shown in Table 3 were used. In other points, various samples were formed in the same manner as in Test Example 1. In the same manner as in Test Example 1, a sample in which a photocatalyst layer was formed on the surface of a ceramic porous body without holding alumina particles was prepared. About these samples, the photocatalyst holding amount and the surface area were measured in the same manner as in Test Example 1. After each sample was shaken, the surface was observed with a scanning electron microscope. The results are shown in Table 3. In addition, each value is an average value of the results of measurement on six samples. Table 3 Average particle size of alumina particles [μηι] Photocatalyst retention amount [g / cm3] Surface area [m2 / cm3] 8 0.061 25.00 22 0.068 23.08 24 483775

25 V. Description of the invention (23) ~ 76 0.01 ^ _ 101 0.2 560 -------- 0.4 — 981 0.8 — 1490 1.5 As shown in Table 4, the compressive strength becomes lower as the skeleton structure becomes thinner. Samples with an average diameter of the moon frame structure smaller than 100 μm will crack and damage when taken by hand. In contrast, a sample body having an average diameter of 100 μm or more of the skeleton structure has sufficient use strength. < Test Example 4 > The relationship between the average diameter of the skeleton structure and the pressure loss was examined. For each sample prepared in Test Example 3, the pressure loss at a normal exhaust flow rate in exhaust & The results are shown in Tables 5 and 10. Table 5 The average diameter of the shelf structure ί β τη) Pressure loss [mmAq] Flow velocity 1.5m / sec Flow velocity 3.0m / sec Flow velocity 4.5m / sec 76 1.4 2.6 5.9 101 1.6 2.7 6.1 560 2.5 4.2 7.5 981 3.4 5.9 10.1 1490 8.2 13.7 18.5 As shown in Table 5 and Figure 10, the average diameter of the skeletal structure exceeds 10026 483775 V. Description of the invention (24) / zm, the pressure loss will be rapid increase. The results of Test Examples 3 and 4 show that the average diameter of the skeleton structure constituting the ceramic porous body is preferably in the range of 100 Am or more and 1000 Em or less. < Test Example 5 > The light transmittance of the photocatalyst filter was examined. As in Test Example 3, the average diameter of the skeleton structure was two types: 891 μm and 1490 μxη, and the thicknesses were four types: 5mm, 10mm, 15mm, and 20mm. Eight different samples were made. The light transmittance of these samples was measured as shown below. That is, an invisible light lamp (trade name "FL10BLB", manufactured by Toshiba Reineck Co., Ltd., with a wavelength of 300 to 420 nm, and a peak wavelength of 360 nm) was installed at a distance of 7 cm from the surface of the sample body. An ultraviolet intensity meter (manufactured by Minorota, Inc., trade name "UM-10") was placed in contact with the inside of the sample body, and the intensity of ultraviolet rays passing through the sample body was measured. The light transmittance is calculated as shown in the following formula, and is calculated as the ratio of the sample body between the invisible light and the ultraviolet intensity meter and when the sample body is not provided. The results are shown in Table 6. Light transmittance (%) = {(Measured intensity when the sample is set) / (Measured intensity when the sample is not set) 丨 X 100 Table 6 Light transmittance (%) Average thickness of the skeleton structure of the photocatalyst filter Average [mm] Diameter 891μιη 1490μπι 27 483775 V. Description of the invention (25) 20 0.5 0.0 15 2.0 0.0 10 8.4 0.6 5 27.0 8.0 As shown in Table 6, the average diameter of the skeleton structure exceeds 100 μm, the thickness of the sample body Above 10 mm, the light transmittance is almost 0%. On the other hand, samples with an average diameter of skeletal structure of 100 μm or less had a light transmittance of 8.4% at a thickness of 10 mm and a light transmittance of 25% or more at a thickness of 5 mm, all showing good light transmittance. From the experimental results of light transmittance, it can be known that the average diameter of the skeleton structure constituting the ceramic porous body is preferably below 100 μm. The porosity, bulk density, and number of cells per 25 mm in length of each of these samples were measured. Here, the porosity was measured by a mercury intrusion method, the bulk density was measured by the same method as in Test Example 1, and the number of units was measured by an optical microscope by visual inspection. As a result, no matter which sample can obtain good experimental results, at least one of the following three conditions is satisfied, namely: (1) the porosity is 65% or more and 95% or less (preferably 75% or more and 85% or less) ); (2) Bulk density of 0.15g / cm3 or more and 0.60g / cm3 or less (preferably 0.18g / cm3 or more and 0.40g / cm3 or less); and (3) 10 cells / 25 mm or more 、 30 pieces / 25mm or less (preferably 12 pieces / 25mm or more and 20 pieces / 25mm or less). Samples that met the two conditions above showed better results, while samples that fully met the above conditions showed the best results. < Experimental Example 6 > 28 483775 5. Explanation of the invention (26) Review the acetaldehyde decomposition energy of the photocatalyst filter. In a container (manufactured by PYLEX) with a capacity of 0.0013 m3 (1.3 liters) and a stirrer, a sample body with a length of 50 mm, a width of 50 mm, and a thickness of 10 mm was suspended vertically with its plane (50 mm x 50 mm surface). This container is provided with a stirrer for flowing the gas in the container. In addition, invisible light is arranged on the side of the container, and ultraviolet rays are irradiated on the plane of the sample body under conditions of a wavelength of 360 nm and lmW / cm2. The sample is a sample (sample 1) for forming a photocatalyst layer on a ceramic substrate holding alumina particles with an average particle diameter of 22 μm (sample 1) and a sample (sample) for forming a photocatalyst layer on a ceramic substrate that does not hold alumina particles 2). For the formation of the photocatalyst layer, the same photocatalyst as in Test Example 2 was used. Then, while turning the stirrer to make the gas in the container flow, while invisible light is lit at 0 (at the same time as lighting), 20 minutes, 40 minutes, 60 minutes, and 80 minutes, 0.2 ml of acetaldehyde is injected. (Saturated state of 90% purity, 23 ° C) in a container. The invisible light goes out 58 minutes after the light is turned on. Then, the gas in the container after being lit from invisible light for a predetermined time is used for quantitative analysis by gas chromatography (separation) spectrum. The results are shown in Table 7 and Figure 11. Table 7 Time (min) Acetic acid concentration [ppm] Sample 1 Sample 2 No sample 0 107 107 107 1 26 62 102 29 H-OJ / / J V. Description of the invention (27) 10 ---___ 0 12 99 20 --- ~-0 --- ^ one 0 96 injection ~ ^ 107 107 203 21 22 61 198 30 0 10 195 4 0 0 0 193 injection --- ^ one 107 107 300 41 --- ^ -___ 25 60 296 50 ----- 0 11 293 60 0 0 291 injection --- 107 107 398 61 21 62 395 70 ---__ 1 16 392 80 ---- ^ 1 1 5 388 injection 108 107 495 81 23 68 490 9 〇2 19 485 1〇〇1 10 482 As shown in Table 7 and Figure 11, 'the blank experiment in which no sample Zhao is set in the container and the light is not irradiated, the ethylene concentration in the container is almost not reduced. Accumulate with each injection. This result shows that acetaldehyde is hardly decomposed by irradiating only ultraviolet rays. In contrast, in the experiment using sample body 2 (without a photocatalyst filter with alumina particles), the concentration was reduced to about 3/5 after 1 minute of acetaldehyde injection, and almost 30% after 20 minutes of injection. 483775 5. Description of the invention (28) No acetaldehyde can be detected. In addition, in the experiment using a sample body (photocatalyst filter with alumina particles), the concentration was reduced to about 1/4 after 1 minute of acetaldehyde injection, and acetaldehyde was hardly detected after 1 minute of injection ( Completely decomposed). From the above results, it is shown that in the above experimental conditions, either sample body i or sample body 2 can almost completely decompose 0.2 ml of acetaldehyde by the photocatalytic action of 20 minutes. In addition, the sample body 1 on which the photocatalyst layer was formed on the ceramic substrate holding the alumina particles did not have a better decomposition performance than the sample body 2. < Third Embodiment; Exhaust Purification Box > An embodiment (exhaust purification box) of an exhaust purification system having a case according to the present invention will be described below with reference to Figs. 12 to 14. Hereinafter, members having the same functions as those in the i-th embodiment are given the same reference numerals, and descriptions thereof are omitted. The exhaust purification device is located in a box 203 formed with an intake port 201 and an exhaust port 202, and is provided with degreasing filters 80, 81 for removing grease components, a dust collector 50 for removing smoke particles, and deodorization A photocatalyst unit 61 and a fan 207 for sucking exhaust gas into the cabinet 203 and exhausting it after purification. The structure of the photocatalyst unit 61 is the same as that of the first embodiment. The case 203 is formed in a longitudinally long box shape, and casters 208 for movement are mounted on the bottom surface. The lower part of the box body 203 opposite to the two sides is formed with suction ports 201 in the central system, respectively. The suction port 201 is a patterned hole. Exhaust ports 202 are formed on upper portions of the same side surfaces forming the intake ports 201, respectively. The exhaust port 202 is composed of a plurality of slits. In addition, the exhaust port 202 may be formed not only on the two sides of the box 203, but also on three or four sides, and even on the top of the box 203. Or, it may be formed only on 31 483775 V. Description of Invention (29) One of the sides and the upper side. It is divided into four rooms in a hierarchy in the cabinet 203. The lowermost chamber 210 is provided with an air inlet 201. Above the lowermost chamber 201 are a first processing chamber 211 provided with deoiling filters 80 and 81, a second processing chamber 21 provided with a dust collector 50, and a third processing chamber 213 provided with a photocatalyst unit 61 and a fan 207. As shown in Fig. 12, an opening 214 communicating with the first processing chamber 211 is formed on one end side of the upper surface of the lowermost chamber 210. An opening 215 communicating with the second processing chamber 212 is formed on one end side (right side in Fig. 12) of the upper surface of the first processing chamber 211. An opening 216 communicating with the third processing chamber 213 is formed on the other end side of the second processing chamber 212 (the side opposite to the openings 214, 215; on the left side in FIG. 12). An exhaust port 202 is provided in the third processing chamber 213. Thereby, an exhaust passage is formed in the casing 203 from the suction port 201 through the lowermost chamber 210, the first processing chamber 211, the second processing chamber 212, and the third processing chamber 213 'to the exhaust port 202. The exhaust gas sucked in through the suction port 201 is flowing along the exhaust path as shown by arrows in Figs. 12 and 13. The first processing chamber 211 is divided into two upper and lower floors by a partition plate 218 having an opening 217 on the other end side (opposite the openings 214, 215). The exhaust gas flowing into the first processing chamber 211 through the opening 214 flows from one end side of the lower layer of the first processing chamber to the other end side, and flows through the opening 217 toward the opening 215, that is, flows from the other end side of the upper layer to one end side. . The curved part of the exhaust passage is provided with a dehumidifying filter 80,81 in the shape of a two-muddle plate at an interval. That is, one degreasing filter 80 is installed inclined with respect to the flow direction to shield the exhaust passage, and the other degreasing filter 81 is

32 483775 5. Description of the invention (30) It is installed above the degreasing filter 80 in an oblique direction opposite to the above degreasing filter 80. In this way, by tilting the degreasing filters 80, 81, the contact area between the degreasing filters 80, 81 and the exhaust gas can be increased, so that more pollutants can be captured. The degreasing filters 80 and 81 are general fat filters, and the oil removal rate is 70% by weight or more. It is also possible to equip this part with three or more degreasing filters. The dust collector 50 is an electric dust collector in the dust collection box 53 that alternates the discharge electrode 51 and the dust collection electrode 52 in parallel in the exhaust gas flow direction. The corona discharge caused by applying a high voltage to the discharge electrode 51 causes the discharge electrode 51 to generate negative ions and electrons. Then, particles such as smoke or fog collide with the negative ions and electrons to charge the particles. By electrostatically absorbing the dust collecting electrode 52 of the charged particles, the particles (smoke particles, etc.) in the exhaust gas can be separated and removed. In the second processing chamber 212, two dust collectors 50 which are detachably arranged in parallel with the exhaust passage are installed in parallel. Here, the cross-sectional area of the exhaust passage in the second processing chamber 212 is made larger than the cross-sectional area of the exhaust passage in the first processing chamber 211. Therefore, the flow velocity of the exhaust gas in the second processing chamber 212 is slower than that in the first processing chamber 211. Since the dust collector 50 captures particles by electrostatically absorbing the charged particles, when the moving speed of the charged particles is faster than the absorbing speed, the particles directly pass through the dust collecting electrode 52 without being attracted. By making the cross-sectional area of the second processing chamber 212 larger than that of the first processing chamber 211 as in the present embodiment, the exhaust gas can be passed through the dust collector 50 'more slowly, so that the particle removal rate is increased. As shown in Fig. 13, the photocatalyst unit 61 is arranged so as to cover the exhaust port 202 formed on the side wall of the third processing chamber 213. Third processing chamber 213 33 483775 5. Description of the invention (31) It has a larger volume than other processing chambers. Here, the third processing chamber 213 is provided with a fan 207. As shown in FIG. 12, the fan 207 is covered on an opening 216 for connecting the second processing chamber 212 and the third processing chamber 213. The exhaust gas sucked by the second processing chamber 212 is dispersed and discharged into the third processing chamber 213 by the fan 207 (see FIG. 13). By diffusing the exhaust gas into the third processing chamber 213, the exhaust gas becomes an exhaust gas passage having a large cross-sectional area. As a result, since the flow velocity of the exhaust gas becomes slow, the contact time between the exhaust gas and the photocatalyst filter 61 increases, and a good deodorizing efficiency can be obtained. Since the photocatalyst unit 61 is disposed on the uppermost layer of the case 203, the grease component in the exhaust gas will not reach here. This is because the grease component can be prevented from adhering to the photocatalyst filter 62 and the function can be reduced. The following describes the operation of this exhaust purification box. First, the cabinet 203 provided with the exhaust gas purification device is moved into a conditioning room. The exhaust gas generated by the conditioning (including pollutants such as oil particles or smoke particles, odor components, etc.) is attracted by the suction of the fan 207 and is sucked into the cabinet 203 by the suction port 201. The suctioned exhaust gas enters the first processing chamber 211 from the lowermost chamber 210 as shown in FIG. 12, and passes through the degreasing filters 80 and 81. As a result, the grease component in the exhaust gas was removed at 70 wt% or more. Degreasing filters 80 and 81 are suitable for removing the higher-quality components (grease components, etc.) in pollutants. On the other hand, some fine pollutants such as smoke particles or most gaseous odor components pass through the degreasing filters 80,81. These exhaust gases flow from the first processing chamber 211 into the second processing chamber 212. Upon entering the second processing chamber 212, since the cross-sectional area of the exhaust passage becomes larger, the exhaust gas reaches the dust collector 50 in a state where the flow velocity becomes slower. When the exhaust passes through the set

34 483775 V. Description of the invention (32) When the dust machine 50 is charged, particles such as smoke are charged and attracted to the dust collecting pole 52 to remove particles such as smoke and mist in the exhaust gas.

The exhaust gas processed in the second processing chamber 212 is sucked into the third processing chamber 213. As shown in Fig. 13, the fan 207 is diffused and released into the room. The exhaust gas filled in the third processing chamber 213 uniformly contacts the photocatalyst unit 61 and passes through the exhaust port 202 to the outside of the cabinet 203. At this time, odor components in the exhaust gas or pollutants that cannot be removed by the dust collector 50 are in contact with the surface of the photocatalyst filter 62 or are captured. These odorous components or fine particles are decomposed by the action of photocatalyst. However, in the exhaust purification box of this structure, the grease captured by the filters 80,81 drips or flows down along the degreasing filters 80,81 as the use time passes. Therefore, an oil receiving tank should be provided below the degreasing filter 80. In addition, even if the grease is dripped by the degreasing filters 80 and 81, the exhaust passage is structured downstream from the case 203, so that the dripping grease does not contaminate the exhaust passage on the downstream side. Furthermore, a cleaner for cleaning the degreasing filters 80 and 81 should be provided. For example, 'a nozzle for spraying cleaning liquid is provided above the degreasing filter 80,81', and a liquid receiving tank is provided below, and by spraying the cleaning liquid through the nozzle on the degreasing transition device 80,81, The grease component captured in the degreasing filter 80,81 is washed away. This can maintain the performance of the degreasing filter 80,81 for a long time and reduce the frequency of maintenance. The degreasing filters 80, 81, the dust collector 50, and the photocatalyst unit 61 are built into the case 203, so they can be easily installed or removed. Therefore, as the purification process of the exhaust gas proceeds, the pollutants and the like removed by the exhaust gas continue to be 35 483775

V. Description of the invention (33) At the time of accumulation ', these components can be easily taken out of the box 203 for cleaning, or replaced with new products for maintenance. < Fourth embodiment; conditioner with exhaust purification device >

Fig. 15 shows an embodiment in which the exhaust gas purification device of the present invention has a conditioner body (a conditioner with an exhaust gas purification device). This conditioner can use well-known smokeless ovens. A central opening is provided in the ceiling 301a of the conditioner body 301, and a conditioning section having a heater 302 and a conditioning board 303 is embedded therein. The heater 302 may be a gas, a heating device, a charcoal, or an electromagnetic induction heater. The conditioning board 303 can be used for baking, mesh, iron plate and non-conductive plate.

The 'conditioner body 301' contains an exhaust purification device for purifying (deoiling, deodorizing, and deodorizing) the exhaust gas generated by the conditioning unit. The exhaust gas purification device includes: a degreasing purifier 20 for removing grease in the exhausted exhaust gas, a dust collector 50 for removing smoke particles, a photocatalyst unit 61 for deodorization, and a device for sucking exhaust gas. Fan 307 discharged after purification. The structures of the degreasing transition device 20 and the photocatalyst unit 61 are the same as those of the first embodiment, and the structure of the dust collector 50 is the same as that of the third embodiment. The heater 302 and the conditioning board 303 are detachably mounted on the inner case 308. The inner box 308 is housed in the outer box 309, and the outer box 309 is fixed to the conditioner body 301. A suction plate 310 is installed on the periphery of the central opening of the ceiling 301a, and a suction port 311 is formed between the suction plate 310 and the upper periphery of the inner box 308. A gap is formed between the inner box 308 and the outer box 309 to surround the inner box 308, and the suction port 311 communicates with this gap. In addition, the lower portion of at least one of the four sides of the conditioner body 301 is shaped 36 483775 V. Description of the invention (34) An exhaust port 312 is formed. The degreasing filter 20 is disposed on the side of the outer box 309, the dust collector 50 and the fan 307 are disposed below the outer box 309, and the photocatalyst unit 61 is disposed opposite to the exhaust port 312 (covering the exhaust port 312). . In this way, an exhaust passage is formed in the conditioner body 301 from the suction port 311 through the degreasing filter 20, the dust collector 50, and the photocatalyst unit 61 to the exhaust port 312. The gap between the inner case 308 and the outer case 309 also becomes part of the exhaust passage. The exhaust gas (containing grease, smoke particles, odor components, etc.) generated by the conditioner in the conditioning department through heating and conditioning is shown by the arrow in the figure, and the attractive force generated by the fan 307 is driven by The suction port 311 is sucked into the exhaust passage. This exhaust system flows sideways along the outside of the inner case 308, and flows downward from the side of the outer case 309 through the degreasing filter 20. Further, it is discharged to the outside through the exhaust port 312 through the dust collector 50 and the photocatalyst unit 61. Here, the place where the deoiling filter 20 is arranged is a portion where the exhaust passage is bent downward from the side of the outer case 309. The exhaust passage to the degreasing filter 20 is formed between the side of the conditioner body 301 and the outer case 309, so the cross-sectional area is small. Therefore, the exhaust gas flow velocity through this part is faster. On the other hand, the dust collector 50 is detachably installed in an exhaust passage below the outer box 309. The exhaust path from the filter unit 10 to the dust collector 50 is opened horizontally under the conditioning section. The cross-sectional area of the exhaust passage of this part may be larger than that of the exhaust passage 20 of the degreasing filter. As a result, the flow velocity of the exhaust gas can be slower than that on the upstream side of the degreasing filter 20. By moderately slowing the flow rate of the exhaust gas, the dust collector 50 disposed there can be more 37 483775

V. Explanation of the invention (35) Efficient separation and removal of smoke particles and the like in the exhaust gas.

The photocatalyst unit 61 is arranged so as to cover the exhaust port 312 formed on the side of the conditioner body 30j, and the photocatalyst filter 62 faces the exhaust port 312. Since the exhaust passage in which the photocatalyst unit 61 is arranged is located in the lower part of the conditioner body 301, it is easy to secure a wide space. The exhaust air attracted here is dispersed and discharged to four places in the conditioner body 301 by the fan 307. Thereby, the flow velocity of the exhaust gas can be further reduced, and the photocatalyst filter 62 can more effectively remove the odor components and the like in the exhaust gas in the same manner as the third embodiment. < Fifth embodiment, conditioning system (丨) > This embodiment relates to a conditioning system for connecting a plurality of conditioners with exhaust purification devices according to the present invention. The conditioners used in this embodiment are shown in FIG. Although this conditioner has a structure similar to that of the fourth embodiment, the following points are different.

The degreasing filter 20 is disposed below the outer box 309. The dust collector 50 and the photocatalyst unit 61 are arranged on the side of the degreasing filter 20, and are arranged side by side. The exhaust gas generated by the conditioning unit flows from the side of the inner box 308 to the degreasing filter 20 below the inner box 308 along the lower surface. The exhaust passage in this part is relatively narrow, which can increase the exhaust flow rate. In this embodiment, by setting the photocatalyst unit 61 in two layers with respect to the flow direction of the exhaust gas, the contact area between the exhaust gas and the photocatalyst is increased, and the purification efficiency can be improved. There is no fan inside the conditioner. A pipe 370 is connected to the exhaust port 312 on the bottom surface of the conditioner body 301. The exhaust port 312 of each conditioner body 301 is connected to a main pipe (not shown) through the pipe 38 483775 V. Invention Description (36) 370. This allows the exhaust passage formed in the conditioner body 301 to communicate with the exhaust passage in the main pipe. Then, by the driving of a large fan (not shown) provided in the main pipe, the exhaust gas is sucked in by the suction port 311 of each conditioner, and after being purified during the flow toward the exhaust port 3 12, The tube 370 draws towards the supervisor. In addition, if an on-off valve is provided in the pipe 370 of each conditioner, the on-off valve of the unused conditioner is closed, and only the on-off valve of the in-use conditioner is opened, and the large fan provided in the main pipe can be effectively used to generate Attractive. Thereby, the suction capacity of the exhaust gas can be improved. Further, the purification ability of the exhaust gas can be increased. < Sixth embodiment; conditioning system (2) > This embodiment is another example of a conditioning system in which a plurality of conditioners with exhaust purification devices according to the present invention are connected. The conditioners used in this embodiment are shown in FIG. In this embodiment, instead of the deoiling filter 20 used in the fifth embodiment, the two-mubu-plate-shaped filters 80 and 81 are arranged in the exhaust passage at an interval. The filters 80 and 81 are the same as those in the third embodiment. As in the fourth embodiment, the filters 80 and 81 are disposed on the side of the outer box 309, and the dust collector 50 is disposed below the outer box 309. The cross-sectional area of the exhaust path from the dust collector 50 to the tube 370 is relatively large. Here, a plurality of photocatalyst units 61 are arranged side by side in the horizontal direction (here, two). The structure of other parts is the same as that of the fifth embodiment. The filters 80 and 81 are the same as those in the third embodiment, and are arranged in the exhaust passage portion bent downward from the side of the outer case 309. However, the difference from the third embodiment is that in this embodiment, the exhaust gas passes through these filters from top to bottom 39 483775 V. Description of the invention (37) 80,81. A recess 84 is formed on the lower surface of the filter 81 disposed below. This recessed portion 84 has the function of an oil receiver when the grease component captured by the filters 80, 81 is dripped or dropped along the filters 80, 81. This prevents the downstream side of the exhaust passage from being contaminated by the grease component. This conditioner is the same as the third embodiment, and may further include a cleaner for cleaning the filters 80, 81.

Further, a shunt plate may be provided on the upstream side (such as the center portion) of the photocatalyst unit 61. Thereby, the exhaust gas can be guided to both sides of the photocatalyst unit 61, and the photocatalyst units 61 arranged in parallel (wide area) in a plurality of horizontal directions can be effectively used.

The foregoing is only a detailed description of specific examples of the present invention, and these examples cannot be used to limit the scope of patent application of the present invention. The "technology already contained" within the scope of the patent application includes various modifications and changes of the specific examples illustrated above. ^ In addition, the technical elements described in this specification or drawings can be used alone or by various combinations of money technology, and the money is limited to the various combinations described in the request at the time of application. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of purposes at the same time, and those who can achieve one of the purposes are also technically useful. DESCRIPTION OF SYMBOLS 10 ... Filter unit 1 〇 ... Building 103 ... Entrance 104 ... Structure wall 105 ... Conditioning room 106 ... Conditioner io? ... Exhaust purification device 108 ... Exhaust pipe 111 ... Breathing hood 112 ... Exhaust port

40 483775

V. Description of the invention (38) 114.... Fan 117… pre-processing section 119… light processing section 20.. Deoiling filter 201… suction port 202 .. exhaust port 203… box 207… fan 208 .. Caster 210 ... Lowest floor room 211 ... First processing room 212 ... Second processing room 213 ... Third processing room 214 ... Opening 215 ... Opening 216 .Partition board 301 .. Conditioner body 301a ... Ceiling 302..Heater 303..Condition board 307..Fan 308..Inner box 309..Outer box 310 .. Air plate 311 ... Suction port 370 ... Pipe 50 ... Dust collector 50 ... Dust collector 51 ... Discharge electrode 52 ... Dust collector 53 ... Dust box 61 ... Photocatalyst unit 62 ... Photocatalyst filter Device 6 3 ... light source 64 ... frame 68 ... frame 69 ... photocatalyst module 71 ... ceramic porous body 72 ... ceramic particles 73 ... ceramic substrate 76 ... photocatalyst layer 77 ... frame structure 78… burn marks 79 ... reflector 80. deoiling filter 81 .. deoiling filter 41 483775 5. Description of the invention (39) 84 ··· recess 312 ... exhaust port 42

Claims (1)

483775 6. Scope of patent application 1. An exhaust gas purification device for those disposed in the exhaust gas flow path, including a pre-processing section for capturing pollutants in the exhaust gas and a light processing section with a photocatalyst filter , And the light processing section is disposed on a more downstream side than the pre-processing section. 2. The exhaust gas purification device according to item 1 of the patent application scope, wherein the photocatalyst filter has a ceramic substrate and a photocatalyst held on the ceramic substrate; and the ceramic substrate system comprises a ceramic porous body having a three-dimensional network structure and The ceramic particles are held in the ceramic porous body. The average particle diameter of the ceramic particles is 1 μm or more and 100 μπ! Or less. 3. The exhaust purification device according to item 2 of the patent application scope, wherein the average diameter of the skeleton structure of the ceramic porous body is more than 100 μ ^ and less than 1. 4. If the exhaust gas purification device according to item 3 of the patent application scope, wherein the photocatalyst is passed; the filter can meet at least one of the following three conditions, namely: the porosity is 65% or more and 95% or less; the volume is male , Degree: 0.15 g / cm3 or more, 0.60 g / cm3 or less; and the number of cells (10 / 25mm or more, 30 / 25mm) (1) (2) (3) or less. 5. The exhaust gas purification device according to item 1 of the patent application scope, wherein the pre-treatment section is provided with a particle transition device for capturing particles in the exhaust gas. 6. The exhaust gas purification device according to item 1 of the patent application, wherein the pre-treatment section is provided with a dust collector for capturing smoke particles in the exhaust gas. 7. The exhaust gas purification device according to item 丨 of the scope of patent application, wherein the pretreatment 43 6. The scope of patent application The department is equipped with a degreasing filter to capture the oil and fat components in the exhaust gas. 8. The exhaust gas purification device according to item 7 in the scope of the patent application, wherein the degreasing filter has a performance of removing more than 70% by weight of oil and fat components in the exhaust gas. 9. The exhaust gas purification device according to item 7 of the patent application scope, wherein the degreasing filter is a plurality of sheet-shaped filters. 10. If the exhaust gas purification device according to item 丨 of the patent application scope, wherein the pre-processing section is provided with a degreasing filter for capturing oil and fat components in the exhaust gas and a dust collector for capturing smoke particles in the exhaust gas; The dust collector is disposed on a more downstream side than the degreasing filter. 11. The exhaust gas purification device according to item 10 of the patent application scope, wherein the opening area of the aforementioned exhaust passage on each inflow side of the deoiling filter, dust collector and photocatalyst filter is in accordance with the above deoiling filter and dust collector And the order of photocatalyst filters is gradually increasing. 12 · If the exhaust gas purification device of any one of the scope of the application for patents 1 to 丨 丨 ′ is provided with a box, the box has an air inlet, an air outlet, and Exhaust passage of exhaust port. 13. If the exhaust gas purification device of any one of the scope of application for patents Nos. 1 to 丨 丨 'is further provided with a conditioner body, the conditioner body includes: a conditioning unit, which is used to carry out the condition A heating conditioner; an air intake port for inhaling the exhaust gas from the conditioning unit; an exhaust port for exhausting the exhaust gas after the purification treatment; and an exhaust passage from the Those who have the suction port to the exhaust port. 14. Exhaust gas purification according to any one of the scope of the patent application No. 1 to No. 丨 丨 44 6. The equipment of the patent scope, wherein the light processing part has a light source for irradiating light to the photocatalyst filter, device 15. The exhaust gas purification device according to any one of the scope of application patents 丨 to 丨 丨, further comprising an ozone supplier for supplying ozone to the exhaust passage. 16 · —An exhaust purification box is provided in a box having an air inlet, an air outlet, and an air passage from the air inlet to the air outlet, and contains the first to eleventh patent applications The exhaust purification device of any one of the above items. 17 · — a conditioner, which is provided with a conditioning unit for heating conditioning of the object to be conditioned, an air inlet for sucking in the exhaust gas generated by the conditioning unit, and for exhausting the purified exhaust gas The exhaust port and the conditioner body of the exhaust passage from the suction port to the exhaust port contain an exhaust purification device that applies for any one of the scope of patent applications Nos. 1 to 11. 18. — A conditioning system is a supervisor who has a plurality of conditioners with a scope of application for patent No. 17 and who are connected to the exhaust port of each conditioner.