JP3963176B2 - Photocatalyst deodorization device - Google Patents

Description

The present invention is a photocatalyst deodorization which generates ultraviolet rays and ozone by discharge between discharge electrodes, and deodorizes indoor air and decomposes and removes volatile organic compounds emitted from building materials by photocatalyst and ozone excited by the generated ultraviolet rays. about the apparatus.

  2. Description of the Related Art Conventionally, a photocatalytic deodorization apparatus using a discharge photocatalyst is known as a deodorization apparatus that removes indoor odors and volatile organic compounds generated from building materials and furniture. As such a conventional photocatalyst deodorization apparatus, Patent Document 1 discloses that a toilet is used by utilizing a phenomenon in which a copper thin plate surface is excited when exposed to ultraviolet rays irradiated from a mercury lamp and adsorbs and reacts malodorous substances and harmful substances. , Which removes malodorous substances generated in kitchens, harmful substances generated in factories, etc. are disclosed.

  Here, an example of a conventional photocatalyst deodorizing apparatus will be described with reference to FIG. 12 and FIG.

  12 and 13, reference numeral 1 denotes a casing that forms the outer shell of the photocatalytic deodorizing apparatus 30, and is configured by combining a plurality of resin molded parts. Reference numeral 2 denotes an air intake opening formed on one side of the housing 1, and 3 denotes an air exhaust opening formed in the upper front of the housing 1. The air intake 2 communicates with the air outlet 3 inside the housing 1. A wind path 4 is formed. 20 is a coarse pre-filter that removes coarse dust, and 21 is a fine pre-filter that removes fine dust. Reference numeral 5 denotes a fan motor as an air blowing means provided in the air passage 4 inside the housing 1. In the air passage 4 on the exhaust side of the fan motor 5, a discharge type photocatalytic reaction device 6 and an ozone decomposition catalyst 8 are provided. Arranged in order. As a result, the air to be deodorized sucked from the intake port 2 by the fan motor 5 passes through the coarse prefilter 20 and the fine prefilter 21, and on the exhaust side of the fan motor 5, the photocatalytic reaction device 6 and the ozone decomposition catalyst 8. In this order, and are discharged from the exhaust port 3 to the outside.

By the way, as a deodorizing apparatus widely used for home use, a toilet deodorizing apparatus used in a toilet can be mentioned. As such a conventional toilet deodorizing apparatus, Patent Document 2 discloses that ozone generated from an ozone generating element is used to react a malodorous component and ozone with a catalyst to deodorize and sterilize the unreacted ozone. Are disclosed. Another Patent Document 3 discloses a method in which malodorous components sucked by a blower are adsorbed and stored with activated carbon and decomposed with an oxidation catalyst. Another patent document 4 discloses a method in which a photocatalyst is excited and deodorized by ultraviolet rays irradiated from an ultraviolet lamp.
JP 52-031965 A Japanese Patent Laid-Open No. 01-310621 Japanese Patent Laid-Open No. 03-125732 Japanese Utility Model Publication No. 05-047073

  However, the conventional photocatalyst deodorization apparatus as described above has a problem that noise is generated. In the photocatalyst reaction device 6 constituting the conventional photocatalyst deodorization device, a high voltage pulse is directly applied between the electrodes to generate corona discharge, and the photocatalyst is excited by ultraviolet rays generated at this time. The photocatalytic deodorization apparatus using such a discharge-type photocatalytic reaction apparatus 6 can be made compact and does not use an ultraviolet lamp because the space occupied by the ultraviolet lamp is unnecessary compared to a photocatalytic deodorization apparatus using an ultraviolet lamp. For this reason, there is an advantage that the product life is long, but when discharging by applying a high voltage pulse, noises such as a beat and a discharge sound are generated according to the frequency of the high voltage pulse. Therefore, depending on the level of noise, there is a possibility that it is not suitable for use in a place where a person is usually present. Moreover, the generation of noise is not only related to discharge but also caused by air passing through the air passage 4. That is, exhaust air and chatter noise (vibration noise) are generated when air collides with a member constituting the housing 1 having the exhaust port 3 formed as an opening. The air sucked from the air inlet 2 by the fan motor 5 is discharged from the air outlet 3. At this time, the air path 4 is formed so that the direction of the air changes smoothly. Therefore, the air sucked from the intake port 2 is exhausted from the exhaust port 3 without losing much momentum, leading to the generation of noise.

  On the other hand, the conventional toilet deodorizer as described above has a problem that it is difficult to maintain a high deodorizing capacity for a long period of time. For example, a toilet deodorizing device using activated carbon has a sufficient deodorizing ability in the initial stage of use, but when used for a long period of time, the adsorption amount of activated carbon is saturated and the deodorizing ability is lowered. Therefore, it was necessary to periodically replace the activated carbon. In addition, a deodorizer using a low-temperature catalyst can decompose and remove part of the odor component by catalytic reaction, but other odor components must be adsorbed and removed by an adsorbent such as activated carbon. As in the case of using the activated carbon, the adsorbed amount is saturated and the deodorizing ability is lowered when it is used for a long time. Therefore, it is necessary to replace the adsorbent on the way. In addition, those using a photocatalyst decompose and remove odor components with the photocatalyst, so there is no need to replace the catalyst even if it is used for a long time, but the strong odor component in the toilet bowl is passed once (only once for the catalyst). About the ability to deodorize by passage), it was inferior to the above-mentioned activated carbon and low temperature catalyst.

The present invention has been made in view of the above problems, and purpose thereof is to provide a photocatalytic deodorizing device having reduced noise while maintaining the advantages of the discharge photocatalyst.

In the first aspect of the present invention, compared with the pulse-shaped voltage waveform, applied voltage by providing a waveform section for outputting a pulsating waveform change in the amplitude is small even AC component the same, the voltage waveform applied during discharge A photocatalyst deodorizing apparatus capable of reducing discharge noise is provided.

According to a second aspect of the present invention, there is provided a photocatalyst deodorizing apparatus capable of easily making a voltage waveform applied at the time of discharging into a saw-like pulsating waveform with a simple configuration.

  Since the present invention is as described above, the following effects can be obtained.

According to the photocatalytic deodorizer in claim 1 of the present invention, only the waveform to be output to the discharge collector and pulsating waveform, while maintaining the advantages of the discharge photocatalyst, it is possible to reduce the discharge sound.

According to the photocatalyst deodorization apparatus of claim 2 of the present invention, the waveform output to the discharge device can be easily made into a sawtooth pulsating waveform with a simple configuration, while maintaining the advantages of the discharge photocatalyst. Sound can be reduced.

  Hereinafter, preferred embodiments of the photocatalyst deodorizing apparatus and the toilet deodorizing apparatus according to the present invention will be described with reference to the accompanying drawings. Note that, in each of these embodiments, the same portions as those in the conventional example are denoted by the same reference numerals, and the description of the common parts will be omitted as much as possible.

  FIGS. 1 and 2 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a housing that forms an outer shell of the photocatalytic deodorizing device 30, and 2 denotes an opening formed on one side of the housing 1. The intake port 3 is an exhaust port formed in the upper front of the housing 1, and an air passage 4 communicating from the intake port 2 to the exhaust port 3 is formed inside the housing 1. 20 is a coarse pre-filter that removes coarse dust, and 21 is a fine pre-filter that removes fine dust. Reference numeral 5 denotes a fan motor as an air blowing means provided in the air passage 4 inside the housing 1. In the air passage 4 on the exhaust side of the fan motor 5, a discharge type photocatalytic reaction device 6 and an ozone decomposition catalyst 8 are provided. Arranged in order. As a result, the air to be deodorized sucked from the intake port 2 by the fan motor 5 passes through the coarse prefilter 20 and the fine prefilter 21, and on the exhaust side of the fan motor 5, the photocatalytic reaction device 6 and the ozone decomposition catalyst 8. In this order, and are discharged from the exhaust port 3 to the outside.

  Here, the schematic configuration of the photocatalytic reaction device 6 will be described with reference to FIG. 3. 11 is a high voltage generating power source for generating a high voltage of several KV to several tens KV, 12 and 12 are a pair of photocatalysts, A positive electrode 13 is disposed between the electrodes 12, and other counter electrodes 14 and 14, which are negative electrodes, are disposed so that the photocatalysts 12 and 12 are sandwiched between the electrodes 13. Further, the positive lead terminal 15 of the high voltage generating power source 11 is connected to the electrode 13, and the negative lead terminal 16 of the high voltage generating power source 11 is connected to the counter electrodes 14 and 14, respectively. A high voltage from the power source 11 is applied between the electrode 13 and the counter electrodes 14 and 14. The electrode 13 and the counter electrodes 14 and 14 and the high voltage generating power supply 11 constitute a discharge device 17 that excites the photocatalyst 12 by generating ultraviolet rays by the discharge between the electrode 13 and the counter electrode 14. The internal circuit of the high voltage generating power source 11 is configured as shown in FIG. 4, 40 is a high voltage transformer, and a high voltage diode 41 and a capacitor 42 are interposed between the secondary winding of the high voltage transformer 40 and the discharge device 17. A rectifying / smoothing circuit 43 is inserted. The output of the high-voltage transformer 40 is a pulsed voltage waveform 45 as shown by a broken line in FIG. 5, and is rectified and smoothed by the rectifying and smoothing circuit 43 to become a sawtooth pulsating waveform 46, thereby constituting the discharge device 17. Applied between the counter electrode 14 and the electrode 13.

  Returning to FIG. 1 and FIG. 2 again, 19 is a high voltage generating device incorporating the high voltage generating power source 11 and the like, and is disposed inside the housing 1. The ozone decomposition catalyst 8 decomposes and removes ozone generated in the photocatalytic reaction device 6. Reference numeral 31 denotes a sound absorbing material made of polyurethane foam or polyethylene resin provided in the air passage 4, and is attached to a surface 37 that forms the air passage 4. In the present embodiment, a plurality of bending points 4 a, 4 b, 4 c are formed in the air passage 4 by the D-shaped partition member 35 and the sound absorbing material 31.

  Next, the effect | action is demonstrated about the said structure. Air containing indoor odor components and volatile organic compounds is sucked into the air passage 4 in the housing 1 from the air inlet 2 by the fan motor 5, and dust and the like are removed by the coarse prefilter 20 and the fine prefilter 21. Later, it is sent to the photocatalytic reactor 6. In this photocatalytic reaction device 6, a high voltage pulse of several KV to several tens KV is applied between the electrode 13 and the counter electrodes 14, 14 from the high voltage generating power source 11, whereby the electrode 13 and the counter electrodes 14, 14, In addition, the insulation of the air flowing through the photocatalyst 12 is partially broken, and corona discharge occurs between the electrodes 13 and the counter electrodes 14 and 14 on both sides of the photocatalyst 2. When corona discharge occurs, ultraviolet rays and ozone are generated, the photocatalyst 12 is excited by the ultraviolet rays, and odor components and volatile organic compounds that are the source of odors in the air are decomposed by a certain amount according to the irradiation amount of ultraviolet rays. Is done. Further, the odor component 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 photocatalyst 12. Ozone remaining without being reacted is decomposed by the ozone decomposition catalyst 8 and becomes oxygen and is discharged to the outside through the discharge port 3 together with air having no odor component or the like. In this way, the air containing odor components and volatile organic compounds in the room is purified and discharged into the room through the exhaust port 3.

  At this time, focusing on the flow of air in the air passage 4, the air in the air passage 4 flows substantially linearly from the intake port 2 until it passes through the ozone decomposition catalyst 8. Thereafter, the air flow that has passed through the ozone decomposition catalyst 8 first linearly faces the side surface by colliding with the partition member 35 (surface 36 facing the photocatalytic reaction device 6 of the air passage 4) at the bending point 4a. Turned around. Next, by colliding with the inner wall 35 at the bending point 4b, the direction is linearly changed toward the upper surface side. Then, by colliding with the sound absorbing material 31 at the bending point 4c, the direction is linearly changed toward the inside of the housing 1, and the exhaust port 3 on the upper front is reached. The air flow in the air passage 4 gradually loses momentum by repeating the collision at each bending point. Therefore, since the air flow is relatively gentle at the exhaust port 3, exhaust noise at the exhaust port 3 and chattering noise of the outer member forming the casing 1 and the like are reduced. In addition, the sound absorbing material 31 provided in the vicinity of the exhaust port 3 absorbs noise generated in the air passage 4 and noise such as discharge noise and swell generated in the photocatalytic reaction device 6. It has a structure that is difficult to communicate to the outside. According to an experiment conducted by the applicant of the present invention, when measured from the exhaust port 3 side, the noise of 37.8 dB in the conventional product was 32.5 dB, and measured from the intake port 2 side, it was 39.0 dB in the conventional product. The noise has been reduced to 33.0 dB, and both have been confirmed to have a noise reduction effect of about 5 to 6 dB.

  Further, as described above, the saw-like pulsating flow 46 is applied between the counter electrode 14 and the electrode 13 of the discharge device 17. At this time, although noise such as squealing and discharge sound is generated according to the frequency of the applied voltage, the amplitude 48 of the AC component is the same even though the applied voltage is the same as compared with the case where the pulsed voltage waveform 45 is applied as it is. Less than 47, the generated sound becomes smaller. It should be noted that the voltage waveform applied between the counter electrode 14 and the electrode 13 of the discharge device 17 is not made direct current even if a spark discharge that occurs in a region where the voltage is higher than the original corona discharge is caused for some reason. This is because the spark discharge is not sustained.

  The modification in a present Example is shown in FIG.6 and FIG.7. 32 is a sound absorbing material made of polyurethane foam or polyethylene resin provided on the surface 36 of the air passage 4 facing the photocatalytic reaction device 6. Other configurations are the same as those of the embodiment shown in FIGS. In this embodiment, the air passage 4 is formed with a plurality of bending points 4 a, 4 b, 4 c by the sound absorbing material 32 in addition to the D-shaped partition member 35 and the sound absorbing material 31. The sound absorbing material 32 provided on the surface 36 facing the photocatalytic reaction device 6 efficiently absorbs the noise generated from the photocatalytic reaction device 6 and greatly contributes to the reduction of noise coming out of the housing 1. In particular, since the position where the sound absorbing material 32 is provided is located downstream of the photocatalytic reaction device 6 with respect to the air flow, the noise generated in the photocatalytic reaction device 6 is quickly absorbed by the sound absorbing material 32. The Rukoto. The sound absorbing material 32 may be arranged so as to surround the photocatalytic reaction device 6.

  As described above, in this embodiment, the discharge device 17 generates ultraviolet rays, and the photocatalytic reaction device 6 as a reaction portion that decomposes odor components by the ultraviolet rays is provided in the air passage 4 to deodorize gases such as indoor air. In the photocatalyst deodorizing apparatus discharged from the exhaust port 3, the air passage 4 is provided with bending points 4 a, 4 b and 4 c, and the air passage 4 is provided with a sound absorbing material 31.

  In this way, by providing the air passage 4 with the bending points 4a, 4b, and 4c, the momentum of the air passing through the air passage 4 can be reduced stepwise, so that the exhaust sound at the exhaust port 3 and the housing can be reduced. It is possible to reduce chatter noise of the outer member forming the body 1 and the like, and by providing the sound absorbing material 31 in the air passage 4, noise generated in the air passage 4, discharge noise generated in the photocatalytic reaction device 6, Noise such as squealing is not easily transmitted to the outside from the exhaust port 3.

  Further, the sound absorbing material 32 is provided on the surface 36 of the air passage 4 facing the photocatalytic reaction device 6.

  In this way, by providing the sound absorbing material 32 on the surface 36 of the air passage 4 that faces the photocatalytic reaction device 6, the discharge sound generated in the photocatalytic reaction device 6 can be effectively absorbed.

  Further, the sound absorbing materials 31 and 32 are provided on the surfaces 36 and 37 of the air passage 4 facing the flow of gas such as indoor air.

  In this way, by providing the sound absorbing materials 31 and 32 on the surfaces 36 and 37 where the air faces (impacts) in the air passage 4, it is possible to effectively absorb the noise generated at the bending points 4a, 4b and 4c. it can.

  Further, the photocatalytic reaction device 6 as a reaction part that generates ultraviolet rays by the discharge device 17 and decomposes odor components by the ultraviolet rays is provided in the air passage 4, and deodorizes gases such as indoor air and discharges them from the exhaust port 3. In the deodorizing device, a rectifying / smoothing circuit 43 serving as a waveform shaping unit that outputs a saw-tooth pulsating waveform 46 is provided in the discharge device 17.

  In this way, by providing a rectifying and smoothing circuit 43 as a waveform shaping unit that outputs a sawtooth pulsating waveform 46 with a small change in the amplitude of the AC component even though the applied voltage is the same as compared with the pulsed voltage waveform 45, Since the amplitude 48 of the voltage waveform applied at the time of discharge is reduced, the discharge sound can be reduced.

  Further, the rectifying / smoothing circuit 43 serving as a waveform shaping unit smoothes the pulsed voltage waveform 45 to generate the sawtooth pulsating waveform 46.

  In this way, the pulsed voltage waveform 45 applied at the time of discharge can be easily made into a sawtooth pulsating waveform 46 with a simple configuration.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description of the common parts is omitted because it is duplicated. 8 and 9 show a state in which the toilet deodorizing apparatus is attached to the toilet bowl. In the figure, reference numeral 50 denotes a toilet bowl body, to which a toilet seat 51 and a toilet deodorizing apparatus 52 are attached, respectively.

  FIGS. 10 and 11 show a toilet deodorizing device 52. In FIG. 10, 1 is a housing forming an outer shell of the toilet deodorizing device 52, and 55 is provided at one end of the housing 1 and is provided with an inlet 2 Is a nozzle-like air intake portion having an opening formed therein, 3 is an exhaust port formed at the other end of the housing 1, and an air passage communicating from the air intake port 2 to the air exhaust port 3 is provided inside the housing 1. 4 is formed. 56 is a pre-filter for removing dust. Reference numeral 5 denotes a fan motor as an air blowing means provided in the air passage 4 inside the housing 1. In the air passage 4 on the exhaust side of the fan motor 5, an adsorption made of a discharge type photocatalytic reaction device 6, for example, activated carbon is used. The agent 57 and the ozonolysis catalyst 8 are arranged in this order. As a result, the air to be deodorized sucked from the inlet 2 by the fan motor 5 passes through the prefilter 57, and on the exhaust side of the fan motor 5, the photocatalytic reaction device 6, the adsorbent 57, and the ozone decomposition catalyst 8 in this order. It passes through and is discharged from the exhaust port 3 to the outside. Similarly to the first embodiment, reference numeral 19 denotes a high voltage generating device incorporating a high voltage generating power source 11 and the like, and is disposed inside the housing 1. The ozone decomposition catalyst 8 decomposes and removes ozone generated in the photocatalytic reaction device 6. The toilet deodorizing device 52 is provided with a seating sensor 60 for detecting the presence or absence of a user. A manual switch may be provided instead of the seating sensor 60. In this case, the operation starts when the ON button is pressed, the operation stops when the OFF button is pressed, and automatically after a predetermined time has elapsed without pressing the OFF button. It is preferable to stop the operation. In addition, a mechanical sensor that mechanically detects opening and closing of the toilet lid 50a may be used.

  Hereinafter, the operation of the above configuration will be described. When the user sits on the toilet seat 51, the seating sensor 60 detects that the user is present and the operation of the toilet deodorizing device 52 is started. On the other hand, when the user leaves the toilet seat 51, the seating sensor 60 detects that there is no user, and the toilet deodorizing device 52 stops operation after a predetermined time has elapsed since the detection. As described above, the toilet deodorizer 52 automatically starts and stops the operation based on the detection by the seating sensor 60.

  When the toilet deodorizing device 52 starts operation, the air containing the odor component in the toilet 50 is sucked into the air passage 4 in the housing 1 from the air inlet 2 formed in the air intake portion 55 by the fan motor 5, After dust and the like are removed by the filter 56, the filter 56 is sent to the photocatalytic reaction device 6. In this photocatalytic reaction device 6, as in the first embodiment, a high voltage pulse of several KV to several tens KV is applied between the electrode 13 and the counter electrodes 14, 14 from the high voltage generating power source 11, The insulation of the air flowing through the electrode 13 and the counter electrodes 14 and 14 and the photocatalyst 12 is partially broken, and corona discharge occurs between the electrodes 13 on both sides of the photocatalyst 2 and the counter electrodes 14 and 14 (see FIG. 3). ). When corona discharge occurs, ultraviolet rays and ozone are generated, the photocatalyst 12 is excited by the ultraviolet rays, and a certain amount of the odor component that is the source of the odor in the air is decomposed according to the irradiation amount of the ultraviolet rays. Further, the odor component 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 photocatalyst 12. Thereafter, both ozone and the odor component remaining without being decomposed flow downstream (exhaust port 3 side) according to the air flow in the air passage 4, and the odor component is adsorbed by the adsorbent 57. The adsorbent 57 is provided for the purpose of adsorbing the odorous component when the concentration of the odorous component in the air temporarily increases and cannot be treated with only the photocatalyst or ozone. In general, when an adsorbent such as activated carbon is used for a long period of time, after adsorbing a high-concentration odor component, the ambient odor concentration decreases, and thus the adsorbed odor component may be discharged. However, in this embodiment, the odor component exhaled by the adsorbent 57 is decomposed by ozone flowing from the upstream (intake port 2 side), so that the odor component is discharged from the housing 1 to the outside even in this case. There is no. In addition, since the adsorbent 57 discharges the odor component, the adsorbing capacity of the adsorbent 57 is recovered, so that the high adsorbing capacity can be maintained over a long period of time. On the other hand, the remaining ozone that has not been reacted is decomposed by the ozone decomposition catalyst 8 and becomes oxygen and is discharged to the outside through the discharge port 3 together with air having no odor component. In this manner, the air containing the odor component in the toilet 50 is purified and discharged from the exhaust port 3. The air exhausted from the toilet 50 through the deodorizing device 52 is deodorized as described above and is sterilized by the ozone generated by the discharge.

  As described above, in this embodiment, the deodorizing device for a toilet that takes in the air in the toilet 50 from the air inlet 2 into the air passage 4 and removes the odor component of the air taken into the air passage 4 and discharges it from the air outlet 3. , A photocatalytic reaction device 6 which is a reaction section for generating ultraviolet rays and ozone in the air passage 4 by electric discharge and decomposing the odor components by the photocatalyst 12 excited by the ultraviolet rays, and an ozone decomposition catalyst for decomposing the ozone 8, and the ozone decomposition catalyst 8 is provided downstream of the photocatalytic reaction device 6.

  In this way, the odor component can be strongly decomposed by the photocatalyst 12 and ozone, and at the same time, ozone can also remove bacteria in the air. If the user inhales a large amount of ozone, the human body may be affected, but unreacted ozone is decomposed by the ozone decomposition catalyst 8 and thus is safe.

  In this embodiment, an adsorbent 57 as an adsorbent for adsorbing odor is provided in the air passage 4.

  In this way, the deodorizing ability can be further improved by the adsorbent 57. Even if the adsorbent 57 exhales the odor component once adsorbed by long-term use, the exhaled odor component is decomposed by ozone, so that the odor component is not discharged from the housing 1 to the outside. Since the adsorbent 57 discharges the odor component, the adsorbing capacity of the adsorbent 57 is recovered, so that the high adsorbing capacity can be maintained over a long period of time.

  In addition, this invention is not limited to the said Example, In the range of the summary of this invention, it can change suitably. For example, you may comprise combining the characteristic part in each said Example, respectively. Moreover, you may attach soundproofing members, such as a sound absorption material and a vibration prevention material, to the apparatus etc. which generate noise in a photocatalyst deodorizing apparatus.

It is a longitudinal cross-sectional view of the photocatalyst deodorizing apparatus in 1st Example of this invention. It is the longitudinal cross-sectional view which looked at the photocatalyst deodorizing apparatus of FIG. 1 from another angle same as the above. It is a disassembled perspective view of a photocatalyst deodorizing apparatus same as the above. It is a circuit diagram of a photocatalyst deodorization response apparatus same as the above. FIG. 4 is a waveform diagram of a voltage applied between an electrode and a counter electrode of the photocatalyst deodorization apparatus. It is a longitudinal cross-sectional view which shows the modification of a photocatalyst deodorizing apparatus same as the above. It is the longitudinal cross-sectional view which looked at the photocatalyst deodorizing apparatus of FIG. 6 from another angle same as the above. It is a top view of the toilet bowl which attached the deodorizing apparatus for toilet bowls in 2nd Example of this invention. It is a side view of the toilet bowl which attached the deodorizing apparatus for toilet bowls same as the above. It is a longitudinal cross-sectional view of the deodorizing apparatus for toilet bowls same as the above. FIG. 11 is a longitudinal sectional view of the toilet deodorizing device of FIG. 10 as seen from another angle. It is a longitudinal cross-sectional view of the photocatalyst deodorization apparatus in a prior art example. FIG. 13 is a longitudinal sectional view of the photocatalyst deodorization apparatus of FIG. 12 as seen from another angle.

Explanation of symbols

3 Exhaust port (exhaust port)
4 air channels 6 Photocatalytic reactor (reaction unit )
17 discharge equipment
43 Rectification smoothing circuit (waveform part)
45 Pulse voltage waveform (waveform)
46 Sawtooth pulsating waveform (pulsating waveform)

Claims (2)

In the photocatalyst deodorization device that generates ultraviolet rays by a discharge device, includes a reaction unit in an air passage, deodorizes air, and discharges the air from a discharge port, the discharge device includes a waveform unit that outputs a pulsating waveform. Photocatalyst deodorization device. 2. The photocatalyst deodorizing apparatus according to claim 1 , wherein the corrugated portion generates a sawtooth pulsating waveform by smoothing the waveform .

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