JP2007196000A - Photocatalyst reactor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photocatalyst reactor that maintains enough insulation distance between terminals while making connection between terminals and electrodes easier, and reducing a size of connector structure. <P>SOLUTION: In a photocatalyst reactor provided with a photocatalyst 2 and a discharger 21 for exciting the photocatalyst 2 by generating ultraviolet rays through electric discharge between an electrode 3 and an opposite electrode 4, the electrode 3, opposite electrode 4 and the lead terminals 41, 42 of a high-voltage generating power source 1 are connected together with elastic lead plates 45. This method can reliably connect together all these electrode 3, opposite electrode 4 and lead terminals 41, 42 of the high-voltage generating power source 1 using the elasticity of the lead plates 45 without the need for screws, etc. to fix them. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a photocatalytic reaction apparatus that excites a photocatalyst by ultraviolet rays generated by discharge between electrodes, thereby decomposing an organic substance.

  This type of so-called discharge-type photocatalytic reaction device is configured by sandwiching a photocatalyst between a pair of electrodes constituting the discharge device, and excites the photocatalyst with ultraviolet rays generated by the discharge between the electrodes, so that the smell in the air is The original organic matter is decomposed.

  However, in the conventional electrode, as shown in FIG. 23, a plate-like metal plate 101 is formed in a lattice shape, and a crosspiece 103 around the opening 102 is formed thin, so that the wind from the opening 102 is passed as much as possible. It has a simplified structure, and there is no portion that becomes the core of the discharge where the electric field is concentrated. For this reason, a phenomenon is generated in which it is easily affected by the surface state, temperature, and humidity during processing of the electrode, and is difficult to discharge.

  As described above, in the conventional configuration, when ultraviolet rays are generated, the voltage applied between the electrodes that start corona discharge is easily affected by temperature and humidity, and this voltage varies greatly at a level of several KV. Further, the voltage at which corona discharge is started is greatly affected by variations in the surface state during processing of the electrode (for example, the presence or absence of surface roughness), and there is a problem that stable discharge is difficult to be performed.

  The base member serving as the base material for the photocatalyst is composed of a honeycomb structure or a three-dimensional skeleton structure made of a ceramic material, and utilizes a photocatalytic reaction. However, in the case of a honeycomb structure, since the gas to be decomposed passes in parallel with the reaction surface of the structure, there is a problem that the gas passes without contacting the reaction surface. In this case, although the gas contact with the reaction surface was good, there was a problem that it was weak in strength. In addition, in any of the structures, the manufacturing process takes time and is expensive.

  Furthermore, the connection between the discharge electrode of the photocatalytic reaction device and the high voltage generating power source has a structure in which a lead wire with a terminal extending from the power source is screwed to the electrode. It was troublesome to attach and detach the lead wire. In addition, since a high voltage is applied to the electrodes, a certain level of insulation distance between different electrodes (40 mm or more) has to be ensured due to the technical level, and there is a concern that the structure of the connection portion becomes large.

  An object of the present invention is to provide a photocatalytic reaction device that solves the above-described problems, facilitates connection between terminals and electrodes, and further ensures the insulation distance between the terminals while miniaturizing the structure of the connection portion. .

  In the photocatalytic reaction device according to the first aspect of the present invention, the elasticity of the elastic member can be used to reliably connect the electrode and the terminal without screwing or the like. Therefore, the connection between the terminal and the electrode can be facilitated.

  In the photocatalytic reaction device according to claim 2 of the present invention, the insulation distance with respect to the high voltage applied to the electrode increases by the amount of the rib provided between the terminals. Therefore, it is not necessary to separate the terminals so much, and the insulation distance between the terminals can be secured while miniaturizing the structure of the connecting portion.

  According to the photocatalytic reaction device of claim 1 of the present invention, the connection between the terminal and the electrode can be facilitated.

  According to the photocatalytic reaction device of claim 2 of the present invention, the insulation distance between the terminals can be ensured while downsizing the structure of the connecting portion.

  Hereinafter, preferred embodiments of the discharge type photocatalytic reaction device according to the present invention will be described with reference to the accompanying drawings.

  1 to 3 show a first embodiment of the present invention, and the schematic configuration of the apparatus will be described with reference to FIG. 1. 1 is a high voltage generating power source for generating a high voltage of several KV to several tens of KV, 2 is a pair of photocatalysts, and a positive electrode 3 is arranged between the photocatalysts 2 and 2, and another counter electrode 4 or 4 that is a negative electrode is sandwiched between the photocatalysts 2 and 2 by the electrode 3. It is arranged. Further, the positive lead terminal 5 of the high voltage generating power source 1 is connected to the electrode 3, and the negative lead terminal 6 of the high voltage generating power source 1 is connected to each of the counter electrodes 4, 4. A high voltage from the power source 1 is applied between the electrode 3 and the counter electrodes 4 and 4. The electrode 3 and the counter electrodes 4 and 4 and the high voltage generating power source 1 constitute a discharge device 21 that excites the photocatalyst 2 by generating ultraviolet rays by the discharge between the electrode 3 and the counter electrode 4.

  2 and 3 showing the details of the electrode 3, the electrode 3 has a lattice plate shape in which a plurality of vertical and horizontal bars 8 are formed inside the outer peripheral portion 7 formed in a frame shape, and the outer peripheral portion 7 through which wind passes. In order to increase the area of the opening 9 inside, the crosspiece 8 has a narrow shape as narrow as possible. In particular, the electrode 3 in this embodiment has a large number of fine protrusions 10 from the outer peripheral portion 7 and the side portions of the crosspiece 8. Each protrusion 10 is formed so that the plate thickness is thinner and narrower toward the tip thereof, and the tip portion is extremely sharpened to easily concentrate the electric field. Further, the protrusions 10 are formed to extend in a pair of left and right (width direction) from both sides of the outer peripheral portion 7 and the crosspiece 8, but one protrusion 10 has an upper surface of the electrode 3 so that discharge can be performed on either the left or right protrusion 10. An edge 11 cut from the lower surface of the electrode 3 toward the distal end portion is formed on the other projection 10.

  The electrode 3 of the present embodiment is formed in a lattice shape in which the opening 9 has a quadrangular shape, but in the honeycomb shape in which the opening 9 has a hexagonal shape, the outer peripheral portion 7 and the crosspiece 8 are made as thin as possible. It is preferable because the wind passage is improved. In addition, the electrode 9 with the protrusions 10 can be easily formed into an arbitrary shape by a manufacturing method using metal etching, such as making the opening 9 round.

  Next, the operation of the above configuration will be described. When a high voltage pulse of several KV to several tens of KV is applied between the electrode 3 and the counter electrodes 4 and 4 from the high voltage generating power source 1, the electrode 3 and the counter electrode 4, 4 and the insulation of the air flowing through the photocatalyst 2 is partially broken, and corona discharge occurs between the electrode 3 and the counter electrode 4 on both sides of the photocatalyst 2. When corona discharge occurs, ultraviolet rays and ozone are generated, the photocatalyst 2 is excited by the ultraviolet rays, and the organic matter that is the source of the odor in the air is decomposed. In addition, the organic matter in the air is decomposed by the oxidizing action of ozone that is generated at the same time, and the deodorizing effect can be enhanced together with the reaction of the photocatalyst 2.

  In the present embodiment, since a large number of fine protrusions 10 are formed on the outer peripheral portion 7 of the electrode 3 and the grid-shaped crosspiece 8, when a high voltage is applied between the electrode 3 and the counter electrodes 4, 4, The electric field naturally concentrates on the protrusion 10 and corona discharge is likely to occur. In addition, the electric field at that time is concentrated particularly on the thin tip portion of the protrusion 10, and corona discharge is always performed in this portion, so that ultraviolet rays are generated with a more stable discharge than the conventional one. It becomes possible. Therefore, in the shape of the electrode 3 in the present embodiment, the variation width of the corona discharge start voltage is stabilized to about several hundred volts.

  As described above, the photocatalytic reaction device in the present embodiment includes the photocatalyst 2 and the discharge device 21 that excites the photocatalyst 2 by generating ultraviolet rays by the discharge between the electrode 3 and the counter electrode 4 that constitute the electrode. The electrode 3 has a fine protrusion 10.

  In this way, since the electrode 3 has the fine protrusions 10, when a high voltage is applied to the electrode 3, the electric field concentrates on the protrusions 10, and discharge becomes easy. Therefore, ultraviolet rays can be generated with stable discharge without being affected by the state of the electrode 3, temperature and humidity.

  Further, the electrode 3 in this embodiment is made of a metal member, that is, a lattice-shaped metal plate, and the protrusion 10 formed on the metal plate has a shape such that the plate thickness is thinner toward the tip, that is, the tip is smaller. In this way, since the electrode 3 is always discharged on the tip side of the projection 10 having a particularly small shape and a thin plate thickness, it is possible to generate ultraviolet rays with a more stable discharge.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as the said 1st Example, and since the description of the common location overlaps, it abbreviate | omits.

  First, the external configuration of the main part will be described with reference to FIGS. 4 to 6. The photocatalytic reaction device here is a plus-side electrode 3 and a minus-side electrode that constitute a discharge device 21 together with the high-voltage generating power source 1. A pair of lattice-shaped cushions 15, 15 are provided opposite to the counter electrode 4, and the photocatalysts 2 A, 2 B are stacked between the cushions 15, 15. When assembling, as shown in FIG. 5, the photocatalysts 2A and 2B, the electrode 3, the counter electrode 4, and the cushions 15 and 15 are stacked in the path 16 through which the air to be deodorized is passed. The three-dimensional object is configured to be accommodated and held between cases 17 and 18 having a pair of upper and lower frame shapes.

  In particular, in this embodiment, as shown in FIGS. 7 to 9, attention is paid to the fact that two types of photocatalysts 2A and 2B having the same lattice shape but different shapes are used. These photocatalysts 2A and 2B have a base material member 22 made of a lattice-shaped polyphenylene sulfide (hereinafter referred to as PPS) molding material with a texture pattern on the surface, and an oxidation that causes a photocatalytic reaction on the surface of the base member 22 It is configured by coating titanium (not shown). Then, a plurality of photocatalysts 2A and 2B are stacked so that the center of the crosspiece 25B in the other photocatalyst 2B is positioned in the opening at the center of the crosspiece 25A in one photocatalyst 2A, thereby passing through the photocatalysts 2A and 2B. The contact area of the gas in the path 16 is increased to the same extent as the conventional three-dimensional skeleton structure. In the present embodiment, the cross-sectional shapes of the bars 25A and 25B, which are the gas contact portions of the photocatalysts 2A and 2B, are all round, but may be other than the round shape, for example, an elliptical shape or a polygonal shape. Various shapes may be considered.

  Also in this embodiment, when a high voltage pulse is applied between the electrode 3 and the counter electrode 4, the insulation of the air flowing through the path 16 is partially broken, and corona discharge is generated between the electrode 3 and the counter electrode 4. Get up. When corona discharge occurs, ultraviolet rays and ozone are generated, and the photocatalysts 2A and 2B are excited by the ultraviolet rays, and the organic matter that is the source of the odor in the air is decomposed. Moreover, organic matter in the air is also decomposed by the oxidizing action of ozone generated at the same time, and the deodorizing effect can be enhanced together with the reaction of the photocatalysts 2A and 2B.

  In particular, in this embodiment, a base member 22 made of a PPS molding material is used as a base material for the photocatalysts 2A and 2B. Compared with conventional ceramic materials, PPS is superior not only in strength but also in heat resistance, arc resistance, and insulation performance at high pressure, and can be molded finely and is excellent in manufacturability. Corona discharge originally occurs between the electrode 3 and the counter electrode 4, but an arc may be generated. In this case, the PPS having excellent arc resistance is safe even if a spark is generated. Further, the conventional ceramic is a so-called fired body and could not be finely assembled or molded, but PPS can eliminate such disadvantages in production.

  In this embodiment, a plurality of lattice-like photocatalysts 2A and 2B are stacked to increase the gas contact area to the same level as the three-dimensional skeleton structure, so that the strength and manufacturability are improved. The photocatalytic reaction including the deodorizing effect can be further enhanced. Further, by forming a texture pattern on the surfaces of the photocatalysts 2A and 2B, the contact with the gas is promoted, and the photocatalytic reaction including the deodorizing effect can be further enhanced.

  As described above, in this embodiment, the photocatalysts 2A and 2B and the discharge device 21 that excites the photocatalysts 2A and 2B by generating ultraviolet rays by the discharge between the electrode 3 and the counter electrode 4 are used. The base member 22 which is the base material is composed of a PPS molded member which is a thermoplastic crystalline molded member.

  In this case, PPS, which is the base member 22 of the photocatalysts 2A and 2B, has excellent strength, fluidity and dimensional stability, and is suitable for precision molding. Can be simplified, low cost can be realized, and sufficient strength can be obtained.

  In this embodiment, since a plurality of photocatalysts 2A and 2B are stacked, the contact area of the gas is increased by the amount of the plurality of photocatalysts 2A and 2B stacked, thereby effectively promoting the photocatalytic reaction. It becomes possible.

  Further, in this embodiment, by forming a pattern, that is, a texture pattern, on the surface of the base member 22, it is possible to promote contact with the gas and effectively promote the photocatalytic reaction here as well.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as the said 1st Example and 2nd Example, and since the description of the common location overlaps, it abbreviate | omits.

  In FIGS. 10 and 11 showing the appearance of the apparatus, 17 and 18 are cases forming the apparatus outer shell also shown in the second embodiment, and 31 is a lead wire drawn out of the cases 17 and 18, This is for connecting the high-voltage generating power source 1 to a commercial power source of AC 100V. An opening 26 for forming a passage 16 through which air flows is provided in front of the cases 17 and 18.

  Next, the internal structure of the cases 17 and 18 will be described with reference to FIGS. 12 to 16. The high-voltage generating power source 1 has a pair of terminals for supplying a high-voltage pulse, that is, pin-shaped plus lead terminals. 41 and a negative lead terminal 42 are provided so as to protrude. In addition, tongue pieces 43 and 44 are respectively provided at the base ends of the positive electrode 3 and the counter electrode 4 which is a negative electrode so as to face the lead terminals 41 and 42. The plus lead terminal 41 and the tongue piece 43 of the electrode 3 and the minus lead terminal 42 and the tongue piece 44 of the counter electrode 4 are connected by a lead plate 45 as an elastic member having elasticity. . Here, the lead plate 45 uses an S-shaped spring phosphor bronze plate, but it may be another conductive member such as stainless steel for springs, and the shape thereof is, for example, U-shaped other than S-shaped. There may be.

  Ribs 48 and 49 for securing an insulation distance between the plus lead terminal 41 and the minus lead terminal 42 are integrally formed on the resin case body 47 that forms the outline of the high voltage generating power source 1. . That is, a cylindrical rib 47 is provided around the plus lead terminal 41 and the minus lead terminal 42, and another plurality (three in the embodiment) are provided between the plus lead terminal 41 and the minus lead terminal 42. ) Wall-like ribs 48 are provided.

  In the above configuration, when assembling, first, the counter electrode 4, the cushion 15, the photocatalyst 2, and the cushion 15, which are negative electrodes, are mounted in this order on the bottomed case 18, and then placed on the tongue piece 44 of the counter electrode 4. The other lead plate 45 is placed on the bottom surface of the case 18 corresponding to the tongue piece 43 of the electrode 3. Then, the electrode 3 is mounted on the upper portion of the cushion 15 and the upper surface opening of the case 18 is closed with the case 17 to complete the assembly excluding the high voltage generating power source 1. Next, when the high-voltage generating power source 1 is inserted into the opening on the base end side of the assembled cases 17 and 18 from the side where the lead terminals 41 and 42 are provided, the leads with which the tongue piece 44 of the counter electrode 4 contacts the lower surface The negative lead terminal 42 contacts the upper surface of the plate 45 while being pressed by the elasticity of the lead plate 45, and the elasticity of the lead plate 45 is between the upper surface of another lead plate 45 and the tongue piece 43 of the electrode 3. The positive lead terminal 41 is inserted while being pushed. Thus, the plus lead terminal 41 and the electrode 3, and the minus lead terminal 42 and the counter electrode 4 are simply and reliably connected using the elasticity of the lead plate 45 by simply pushing the high voltage generating power source 1 from one side. The

  Also in this embodiment, when a high voltage pulse is applied between the electrode 3 and the counter electrode 4, the insulation of the air flowing through the path 16 is partially broken, and corona discharge is generated between the electrode 3 and the counter electrode 4. Happens. When corona discharge occurs, ultraviolet rays and ozone are generated, the photocatalyst 2 is excited by the ultraviolet rays, and the organic matter that is the source of the odor in the air is decomposed. In addition, the organic matter in the air is decomposed by the oxidizing action of ozone that is generated at the same time, and the deodorizing effect can be enhanced together with the reaction of the photocatalyst 2.

  As described above, the present embodiment includes the photocatalyst 2 and the discharge device 21 that excites the photocatalyst 2 by generating ultraviolet rays by the discharge between the electrode 3 and the counter electrode 4. The lead terminals 41 and 42 of the high voltage generating power source 1 are connected by a lead plate 45 having elasticity.

  In this way, the elasticity of the lead plate 45 can be used to reliably connect the electrode 3 and the counter electrode 4 to the lead terminals 41 and 42 of the high voltage generating power source 1 without screwing or the like. . Therefore, the connection between the lead terminals 41 and 42 of the high-voltage generating power supply 1 and the electrode 3 or the counter electrode 4 can be facilitated.

  In this embodiment, a plurality of ribs 48 are provided between the pair of lead terminals 41 and 42. Since the plurality of ribs 48 are provided between the lead terminals 41 and 42, the insulation distance against the high voltage applied to the electrode 3 and the counter electrode 4 is increased. Therefore, it is not necessary to separate the lead terminals 41 and 42 so much, and the insulation distance between the lead terminals 41 and 42 can be secured while reducing the size of the connection portion.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as the said 1st Example, and since the description of the common location overlaps, it abbreviate | omits.

  FIG. 17 schematically shows the structure of a deodorizing device main body as a smoke separator incorporating a photocatalytic reaction device. In this figure, 51 is a main body case that forms the outline of the deodorizing device. The main body case 51 includes a photocatalyst deodorizing unit 52, a high-voltage power supply 53 for a photocatalyst deodorizing unit that applies a high voltage to the photocatalyst deodorizing unit 52, and a high-pressure collector. A dust unit 54, a high-voltage dust collection unit high-voltage power supply 55 that applies a high voltage to the high-pressure dust collection unit 54, a prefilter 56, and a sirocco fan 57 that is a blower are housed. When the sirocco fan 57 is operated, air containing cigarette smoke is taken into the main body case 51 from the intake port 58 above the main body case 51, and the prefilter 56, the high-pressure dust collecting unit 54, and the photocatalyst deodorizing unit. 52 and sirocco fan 57 in order. In this process, the prefilter 56 removes large dust contained in the intake air. In addition, the high-pressure dust collecting unit 54 removes smoke fine particles, fine dust, and the like. Further, in the photocatalyst deodorizing unit 52, the odor component is decomposed and removed by the photocatalytic reaction. The air that has passed through the above path and has been cleaned is exhausted to the outside from the exhaust port 59 in the lower part of the main body case 51.

  18 to 20 show the configuration of a single photocatalyst module constituting the photocatalyst deodorizing unit 52. FIG. The photocatalyst module 61 here includes a photocatalyst 2 and 2, an electrode 3 between the photocatalysts 2 and 2, and photocatalysts 2 and 2 in module cases 62 and 63 made of synthetic resin such as ABS. Counter electrodes 4 and 4 opposed to the outside and spacers 64 and 65 made of silicone rubber are incorporated. Further, in order to make an electrical connection with the outside, a terminal 66 connected to the terminal portion of the electrode 3 and a holding plate 67 are attached to one side of the module cases 62 and 63, respectively. On the other side of 62 and 63, a terminal 69 connected to the terminal portions of the counter electrodes 4 and 4, a pressing plate 70, and a grounding metal 71 are attached. In particular, the plus-side terminal 66 actually has one continuous shape so that it can be electrically connected when a plurality of photocatalyst modules 61 are used side by side. It is attached when assembling into the reference). The electrode 3 is a positive electrode and the counter electrode 4 is a negative electrode.

  FIG. 21 is a cross-sectional view of a photocatalyst deodorizing unit 52 in which one or more photocatalyst modules 61 are attached to a frame 72. In the figure, a photocatalyst module 61 is attached from above a frame 72 having a frame shape. At this time, each photocatalyst module 61 is attached to the terminal portion side of the electrode 3 via an insulating plate 73 such as ABS resin. The insulating plate 73 is for securing an insulating distance between the electrode 3 and a frame 72 made of a stainless steel plate. In addition, the counter electrode 4 and the frame 72 are electrically connected by the grounding metal 71 attached to the terminal portion of the counter electrode 4. That is, the counter electrode 4 is grounded to the frame 72.

  In addition, an ozone decomposition catalyst 76 housed in an ozone catalyst case 75 made of ABS resin is attached to the frame 72. Reference numeral 77 denotes a sponge tape interposed between the ozone catalyst case 75 and the ozone decomposition catalyst 76.

  Next, the operation of the above-described configuration will be described. During the operation of the sirocco fan 57 rotating, dirty air including, for example, cigarette smoke sucked from the intake port 58 is subjected to large dust when passing through the prefilter 56. Removed. A high voltage of 4 to 5 KV is applied to the subsequent high-pressure dust collection unit 54 from the high-voltage power supply 55 for the high-pressure dust collection unit, and fine particles such as cigarette smoke and dust are removed here.

  In the next photocatalyst deodorizing unit 52, air from which dust has been removed (including odorous components) flows downward from above. At this time, the air passes in the order of the counter electrode 4, the photocatalyst 2, the electrode 3, the photocatalyst 2, the counter electrode 4, and the ozone decomposition catalyst 76. A high voltage pulse is applied between the electrode 3 and the counter electrodes 4 and 4 from a high voltage power supply 53 for the photocatalyst unit which is a high voltage generating power supply. This high voltage pulse is a DC voltage of 6 to 10 KV and a pulse period of 50 to 1000 Hz. When a high voltage pulse is applied between the electrode 3 and the counter electrodes 4, 4, air insulation is partially broken, and corona discharge occurs between the electrode 3 on both sides of the photocatalyst 2 and the counter electrode 4. When corona discharge occurs, ultraviolet rays and ozone are generated, the photocatalyst 2 is excited by the ultraviolet rays, and the organic matter that is the source of the odor in the air is decomposed. Further, the organic matter in the air is also decomposed by the oxidizing action of ozone generated at the same time, and the deodorizing effect is enhanced with the reaction of the photocatalyst 2. The ozone decomposition catalyst 76 downstream of the photocatalyst 2 lowers the ozone generated by the photocatalyst deodorizing unit 52 to a concentration that is harmless to the human body.

  Next, a method for holding the photocatalyst 2 will be described. The photocatalyst 2 is manufactured, for example, by supporting titanium dioxide on a ceramic on a sponge, and a spacer 65 is provided between the photocatalyst 2 and the counter electrode 4. The spacer 65 is for preventing the photocatalyst 2 and the counter electrode 4 from being in direct contact with each other. The reason is that when the photocatalyst 2 and the counter electrode 4 are in direct contact, discharge easily occurs at the contacted portion, and partial discharge or spark discharge occurs. On the other hand, the other spacer 64 is made of a hollow silicone rubber member, and elastically holds the photocatalyst 2 by utilizing its elasticity, and absorbs variations in thickness when the photocatalyst 2 is accommodated.

  In FIG. 22, three photocatalyst modules 61 are attached to the frame 72. That is, as one photocatalyst deodorizing unit 52, three photocatalyst modules 61 including the ozone decomposition catalyst 76 are incorporated, and when the photocatalyst module 61 is used alone, or two photocatalyst modules 61 are incorporated into the frame 72. The deodorizing ability can be improved as compared with the case. As described above, by increasing or decreasing the number of the photocatalyst modules 61 depending on the size of the deodorizing apparatus main body and the required deodorizing ability, an optimal module configuration suitable for the product can be obtained.

  As described above, by incorporating the photocatalyst module 61 including the ozone decomposition catalyst 76 into the frame 72, one photocatalyst deodorizing unit 52 is configured as a deodorizing unit. In this embodiment, the deodorizing unit is composed of a photocatalytic reaction and ozone. Since the odor component is decomposed and deodorized by the generation of the odor, the adsorbed odor component as in the case of the conventional activated carbon is not accumulated and the deodorization capability is not gradually lowered, and the high deodorization capability can be maintained over a long period of time.

  Further, in the photocatalyst deodorizing unit 52 of this embodiment, the terminal 66 is connected to the electrode 3 of each photocatalyst module 61, and the counter electrodes 4, 4 are electrically connected to the frame 72 via another terminal 69 and a grounding fitting 71. When the photocatalyst deodorizing unit 52 is accommodated in the main body case 51 that is connected and accommodated in the smoke separator, the electrode spring (not shown) of the main body case 51 and the terminal 66 are electrically connected, and the frame 72 is The metallic photocatalyst deodorizing unit receiving portion (not shown) provided in the main body case 51 is in contact with the ground, and is grounded. Thus, since the photocatalyst deodorizing unit 52 is detachably provided in the main body case 51 of the smoke separator, even if the photocatalyst deodorizing unit 52 becomes dirty due to long-term use, the photocatalyst deodorizing unit 52 is removed from the main body case 51 of the smoke separator. 52 can be removed for easy cleaning. Further, even after cleaning, simply attaching the photocatalyst deodorizing unit 52 to the main body case 51 completes the electrical connection at the same time, and the operation can be started immediately, so that the apparatus can be handled easily.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention.

1 is an overall schematic configuration diagram of a photocatalytic reaction device showing a first embodiment of the present invention. It is a partially expanded plan view of the same electrode. It is the sectional view on the AA line of FIG. 2 same as the above. It is an external appearance perspective view showing arrangement | positioning of the principal part which shows 2nd Example of this invention. It is an external appearance perspective view of an apparatus at the time of completion of assembly same as the above. It is sectional drawing of an apparatus at the time of completion of assembly same as the above. It is a top view of the state which laminated | stacked the photocatalyst same as the above. It is a top view of one photocatalyst same as the above. It is a top view of the other photocatalyst same as the above. It is a top view showing the external appearance of the whole apparatus which shows 3rd Example of this invention. It is a side view showing the external appearance of the whole apparatus same as the above. It is a top view of the state which removed one cover same as the above. It is sectional drawing of an apparatus same as the above. It is a disassembled perspective view of an apparatus same as the above. It is a side view of the principal part which shows a minus lead terminal same as the above and the composition of the circumference. It is a side view of the principal part which shows the structure of a plus lead terminal and its periphery same as the above. It is a schematic block diagram of the deodorizing apparatus main body incorporating the photocatalytic reaction device which shows 4th Example of this invention. It is a top view of a photocatalyst module simple substance same as the above. It is sectional drawing of a photocatalyst module single-piece | unit same as the above. It is sectional drawing of a photocatalyst module single-piece | unit same as the above. It is sectional drawing of the state which attached the photocatalyst module same as the above to the flame | frame. It is a top view of the state which attached three photocatalyst modules same as the above to the flame | frame. It is a top view of the electrode which shows a prior art example.

Explanation of symbols

2,2A, 2B Photocatalyst 3 Electrode 4 Counter electrode (electrode)
41, 42 Lead terminal (terminal)
45 Lead plate (elastic member)
48 Ribs

Claims (2)

  In the photocatalytic reaction device using a photocatalyst and discharge between electrodes, the electrode and a terminal of a power source are connected by an elastic member having elasticity. The photocatalytic reaction device according to claim 1, wherein a rib is provided between the terminals.

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