JP6527712B2 - Photocatalytic device - Google Patents

Description

  The present invention relates to a photocatalyst device, and more specifically, by providing a photocatalyst filter having a hollow columnar shape such as a cylindrical shape, an elliptic cylinder shape, and a square cylinder shape, and a light source disposed inside the photocatalyst filter, The present invention relates to a photocatalytic device in which a photocatalytic effect is more efficiently exhibited by effectively utilizing activation light emitted from the light source.

Photocatalytic deodorizing devices comprising a photocatalytic filter and a light source (e.g. black light) for irradiating the photocatalytic filter with light for activation have been known for some time. A typical photocatalyst used for the photocatalyst filter is titanium oxide (TiO ₂ ). In this type of photocatalyst deodorizing apparatus, the strong oxidizing action of the photocatalyst is used to adsorb and decompose the odor contained in the gas to be treated. In other words, the organic substance contained in the gas to be treated is decomposed into water and carbon dioxide by the oxidation action of the photocatalyst generated by the ultraviolet light irradiation, thereby adsorbing and decomposing the odor component in the gas.

  However, due to the oxidation action of the photocatalyst, a sulfur compound (for example, hydrogen sulfide) becomes sulfuric acid and a nitrogen compound (for example, ammonia) becomes nitric acid, and adheres to the surface of the photocatalyst. And these deposits become catalyst poisons and reduce the ability of the photocatalyst filter. For this reason, it is necessary to periodically take out the used photocatalytic filter and replace it with a new one, or to wash or calcine it with water to regenerate the ability of the used photocatalytic filter.

  A pleated type is generally used as the shape of the photocatalytic filter. Although this takes extra time and cost to form a flat filter into a pleated shape (folded shape), it has a great advantage that the filtration area can be greatly expanded compared to a flat filter. is there.

  A conventional pleated photocatalyst filter using a non-woven fabric usually forms a non-woven fabric carrying a photocatalyst in a pleated shape, and has a rectangular planar shape as a whole. A photocatalyst filter having such an overall shape is usually configured to receive ultraviolet light generated from a light source disposed on one side thereof on one side. However, then, the intensity of the ultraviolet light in the area immediately below the light source of the photocatalyst filter is maximum, and the intensity of the ultraviolet light decreases as the distance from the area directly below the light source decreases. Even if activated, the activation of the photocatalyst becomes insufficient as the distance from the region directly below the light source is increased. That is, there is a disadvantage that a desired photocatalytic effect can not be obtained in a region far from the region directly below the light source.

  Moreover, since the light source is disposed close to one side of the photocatalytic filter, the ultraviolet light emitted from the light source to the side opposite to the photocatalytic filter is not used at all. For this reason, there is also a problem that the utilization efficiency of ultraviolet light is very low.

  In order to solve these problems, it is conceivable to form the entire shape of the photocatalytic filter, for example, in a cylindrical shape, and to arrange a linear light source concentrically inside the same. In this case, (a) a method in which the fluid to be treated is sent from the opening provided at one end of the photocatalyst filter into the interior of the photocatalyst filter, and then transmitted through the photocatalyst filter from the inside and discharged to the outside; A method is conceivable in which the processing fluid is allowed to permeate from the outside to the inside of the photocatalyst filter and then discharged from the inside through the openings provided at one end or both ends of the photocatalyst filter to the outside. However, if this is done, the fluid to be treated does not flow evenly over the entire surface of the photocatalytic filter, resulting in the disadvantage that the photocatalytic effect is significantly different depending on the location of the photocatalytic filter. Therefore, it is necessary to make some contrivance to simultaneously solve these problems.

  As a prior art relevant to this invention other than the above, there exists a deodorizing apparatus disclosed by patent document 1 (Unexamined-Japanese-Patent No. 2000-70355), for example. This deodorizing apparatus comprises a cylindrical photocatalytic filter having only one end open, a linear light source concentrically disposed inside the photocatalytic filter, and an opening provided at one end of the photocatalytic filter. And a heater for supplying air as the fluid to be treated inside. The photocatalyst filter is entirely covered with a filter cover having an exhaust hole. Air which has permeated the cylindrical photocatalyst filter from the inside to the outside is discharged from the exhaust port to the outside of the apparatus through the gap between the photocatalyst filter and the filter cover. In this deodorizing device, since the convection of the air warmed by the heater is used, a fan, a motor, etc. become unnecessary, and there is an effect that miniaturization and simplification can be achieved and there is no noise or vibration by a motor. There is an effect that it is suitable for installation under a hospital bed or the like (see claims 1 and 2, FIGS. 1 to 3, paragraphs 0014 to 0032).

  As another prior art relevant to this invention, there exists an air cleaner disclosed by patent document 2 (Unexamined-Japanese-Patent No. 2001-113129). The air cleaner includes a prefilter, a cylindrical photocatalyst filter, a light source disposed inside the photocatalyst filter, and ultraviolet light emitted from the light source in a housing having an inlet and an outlet. A reflecting plate that reflects toward the photocatalytic filter, and a blower that introduces air as the fluid to be treated from the suction port into the housing and discharges the air from the blowout port. The photocatalytic filter is disposed concentrically with the light source and is rotatable around its central axis, so that dirt attached on the suction side is decomposed by photocatalysis on the discharge side. There is an effect that it can be regenerated, and therefore the deodorizing effect can be maintained for a long period of time (see claim 1, FIGS. 1 to 3, paragraphs 0013 to 0021).

  As another prior art related to the present invention, there is a photocatalyst deodorizing system disclosed in Patent Document 3 (Japanese Patent Application Laid-Open No. 2004-305436). In this photocatalyst deodorizing system, a deodorizing filter (that is, a photocatalyst filter) carrying a photocatalyst is in the form of a hollow cylinder and disposed in an air passage where an air flow is generated by the air flow generating means. Then, a light source is disposed at any one of the openings of the photocatalyst filter, and a prism for condensing ultraviolet light from the light source on the entire hollow inner surface of the photocatalyst filter is disposed. Since it has such a configuration, it is possible to secure the ultraviolet light irradiation property to the photocatalyst filter while suppressing the air flow resistance derived from the shapes of the photocatalyst filter and the light source to a low level. There is an effect that long life and high efficiency of dust collection and deodorization can be achieved (see claims 1 to 2, FIGS. 1 to 7, paragraphs 0006, 0012, 0020, 0021 to 0037).

Unexamined-Japanese-Patent No. 2000-70355 JP 2001-113129 A Unexamined-Japanese-Patent No. 2004-305436

  However, in the deodorizing apparatus of Patent Document 1 described above, air as the fluid to be treated passes through the cylindrical photocatalyst filter from the inside to the outside, and then passes through the gap between the photocatalyst filter and the filter cover. There is no concern that the deodorizing effect greatly varies depending on the location of the photocatalyst filter due to a change in air permeation state. That is, Patent Document 1 does not disclose at all the disadvantage that the deodorizing effect fluctuates significantly depending on the location of the photocatalyst filter.

  In the air purifier of Patent Document 2 described above, the light source is disposed concentrically inside the cylindrical photocatalytic filter, and the photocatalytic filter is made rotatable so that the photocatalytic filter regenerates the photocatalytic filter. There is no consideration on the fact that the deodorizing effect greatly varies depending on the location of the photocatalyst filter due to the change in the air permeation state. In other words, similar to the deodorizing device of Patent Document 1 described above, Patent Document 2 does not disclose the disadvantage that the deodorizing effect is significantly varied depending on the location of the photocatalyst filter.

  In the photocatalyst deodorizing system of Patent Document 3 described above, a light source is disposed at any one of the openings of the photocatalyst filter in the form of a hollow cylinder, and ultraviolet light from the light source is reflected by the prism on the hollow inner surface of the photocatalyst filter. Although the light is condensed on the entire surface, no significant consideration is given to the fact that the deodorizing effect greatly varies depending on the location of the photocatalyst filter due to the change in the air permeation state. In other words, as with the deodorizing device of Patent Document 1 and the air cleaner of Patent Document 2 described above, Patent Document 3 does not disclose anything about the disadvantage that the deodorizing effect varies significantly depending on the location of the photocatalyst filter. It has not been.

  The present invention has been made in consideration of the circumstances as described above, and the object of the present invention is to make it possible to effectively irradiate light emitted from a light source to a photocatalyst filter, and An object of the present invention is to provide a photocatalytic device capable of suppressing the fluctuation of the photocatalytic effect within a desired range over the entire surface.

  Another object of the present invention is to provide a photocatalytic device in which the photocatalytic effect does not fluctuate significantly depending on the location of the photocatalyst filter even when a configuration in which a light source is disposed inside the hollow columnar photocatalyst filter is adopted. is there.

  Still another object of the present invention is to provide a photocatalytic device that can easily meet various needs by modularizing the photocatalytic filter, the light source and the cover.

  Other objects of the present invention which are not specified herein will become apparent from the following description and the accompanying drawings.

(1) According to a first aspect of the present invention, a photocatalyst device is provided. This photocatalyst device is
Hollow columnar photocatalyst filter,
A light source disposed in an internal space of the photocatalyst filter for irradiating the photocatalyst filter with activation light;
A cover disposed outside the photocatalyst filter and forming an introduction flow path extending along the photocatalyst filter with the photocatalyst filter;
A lead-out channel formed in communication with the internal space of the photocatalyst filter;
A flow generation unit configured to generate a flow of the fluid to be processed in the first introduction channel, the inner space, and the lead channel;
The cross-sectional area of the introduction channel is set such that the fluctuation of the flow velocity of the fluid to be treated is suppressed over the entire surface of the photocatalyst filter compared to the case without the cover.
In operation, after the fluid to be treated is introduced into the introduction channel formed between the photocatalyst filter and the cover, the fluid passes through the photocatalyst filter and enters the internal space, and further the outlet channel is formed. It is characterized in that it is discharged to the outside through.

  In the photocatalyst device of the present invention, the photocatalyst filter has a hollow column shape, and the activation light is irradiated from the light source disposed in the inner space thereof. By concentrically arranging the light source, the light irradiated from the light source to the entire periphery can be effectively irradiated to the photocatalyst filter.

  In operation, the fluid to be treated passes from the introduction channel formed between the cover and the photocatalytic filter, passes through the photocatalytic filter, and enters the internal space, but the cross-sectional area of the introduction channel Is set such that fluctuations in the flow velocity of the fluid to be treated are suppressed (preferably substantially equal) over the entire surface of the photocatalyst filter as compared to the case without the cover. It is possible to suppress the fluctuation of the photocatalytic effect within a desired range (preferably, within a range which can be said to be substantially even).

  Moreover, while the said introduction flow path is formed of the said cover and the said photocatalyst filter, the cross-sectional area of the said introduction flow path is more than the case where the fluctuation | variation of the flow velocity of the said to-be-processed fluid does not have the said cover over the whole surface of the said photocatalyst filter. Because the light source is set so as to be suppressed (preferably substantially equal), the light source may be disposed inside the hollow column-shaped photocatalyst filter depending on the position of the photocatalyst filter. Deodorizing effect does not change significantly.

  Furthermore, since the light source is disposed inside the hollow cylindrical photocatalyst filter and the cover is disposed outside the photocatalyst filter, it is easy to integrate them into a photocatalyst module (modularize) It is. Therefore, a plurality of these photocatalyst modules are combined, for example, juxtaposed in the longitudinal direction of the photocatalyst filter (series connection), or juxtaposed in the direction orthogonal to the longitudinal axis of the photocatalyst filter (parallel connection) Can be combined (serial-parallel connection, parallel-serial connection), and can easily meet various needs.

  In the present invention, “hollow pillar” means, for example, a hollow and pillared shape such as a cylindrical shape, an elliptic cylindrical shape, and a rectangular cylindrical shape. Also, "photocatalyst device" means a device provided with a photocatalytic filter and a light source for activating the photocatalytic agent to exhibit a desired photocatalytic effect (various effects of the photocatalytic agent), photocatalytic deodorizing device, photocatalytic sterilization The present invention can be realized as various devices such as an (antibacterial) device, a photocatalyst purification device, and the like. The “treatment fluid” means a fluid to be treated by the photocatalyst device of the present invention, and is usually air, but may be gas or liquid other than air.

  (2) In a preferable example of the photocatalyst device according to the first aspect of the present invention, the cover is formed in a tapered shape, and the cross-sectional area of the introduction channel in the direction orthogonal to the photocatalyst filter is the beginning of the introduction channel. It is set to gradually decrease from the end toward the end.

  (3) In another preferable example of the photocatalyst device according to the first aspect of the present invention, the photocatalyst filter is pleated.

  (4) In still another preferred embodiment of the photoodor odor device according to the first aspect of the present invention, the upstream end of the photocatalyst filter is closed, and the downstream end is open; The flow generating means is connected to the downstream end.

  (5) In still another preferable example of the photocatalyst device according to the first aspect of the present invention, the photocatalyst filter is cylindrical, and the light source is linear and disposed concentric with the catalyst filter.

  (6) In still another preferred embodiment of the photocatalyst device according to the first aspect of the present invention, the device further comprises a base member including the flow generating means, and the downstream end of the photocatalyst filter and the downstream side of the light source The end of the is fixed to the base member.

(7) According to a second aspect of the present invention, there is provided another photocatalyst device including a photocatalyst module. This photocatalyst device is
A plurality of photocatalyst devices according to the first aspect of the present invention described above are included as photocatalyst modules, and a common fluid inlet or a common fluid outlet is provided to the photocatalyst modules. It is

  The photocatalyst device according to the second aspect of the present invention includes a plurality of the photocatalyst devices according to the first aspect of the present invention as a photocatalyst module, so the same effects as the photocatalyst devices according to the first aspect of the present invention described above It is clear that

  (8) In a preferable example of the photocatalyst device according to the second aspect of the present invention, a plurality of the photocatalyst modules are combined so as to mutually connect the lead-out channel thereof and the introduction channel, The photocatalyst modules are connected in series.

  (9) In another preferable example of the photocatalyst device according to the second aspect of the present invention, a plurality of the photocatalyst modules are combined so as to mutually connect the lead-out channel thereof and the introduction channel, A plurality of the photocatalyst modules are connected in series, and any one of the light sources is shared by the plurality of photocatalyst modules.

  (10) In still another preferable example of the photocatalyst device according to the second aspect of the present invention, a plurality of the photocatalyst modules are combined such that their lead-out flow paths and the lead-in flow paths are mutually connected. The plurality of photocatalyst modules are connected in parallel.

  According to the photocatalyst device according to the first and second aspects of the present invention, (a) light emitted from the light source can be effectively irradiated to the photocatalyst filter, and the entire surface of the photocatalyst filter has a photocatalytic effect Fluctuation can be suppressed within a desired range. (B) Even when adopting a configuration in which the light source is disposed inside the hollow columnar photocatalyst filter, the photocatalytic effect does not significantly fluctuate depending on the location of the photocatalyst filter. (C) By modularizing the photocatalytic filter, the light source and the cover, it is possible to easily meet various needs.

It is sectional drawing which followed the AA line of FIG. 3 which shows the structure of the photocatalyst deodorizing apparatus which concerns on 1st Embodiment of this invention. It is a perspective view which shows the structure of the photocatalyst filter unit based on 1st Embodiment shown by FIG. It is the end view which looked at the photocatalyst filter unit which concerns on 1st Embodiment shown by FIG. 1 from upper direction. It is a conceptual diagram which shows the structure of the photocatalyst deodorizing apparatus which concerns on 2nd Embodiment of this invention, and four photocatalyst deodorizing modules are connected in parallel. It is a conceptual diagram which shows the structure of the photocatalyst deodorizing apparatus which concerns on 3rd Embodiment of this invention, and two photocatalyst deodorizing modules are connected in series. It is a conceptual diagram which shows the structure of the photocatalyst deodorizing apparatus concerning 4th Embodiment of this invention, and the full length of one photocatalyst deodorizing module is extended according to the light source with a long full length. It is a conceptual diagram which shows the structure of the photocatalyst deodorizing apparatus which concerns on 5th Embodiment of this invention, and three photocatalyst deodorizing modules are connected in series. It is a see-through | perspective perspective view which shows the structure of the photocatalyst deodorizing apparatus provided with the conventional planar filter. The test results show how the acetaldehyde removal rate changes depending on the ultraviolet light intensity, and (a) is a table showing the relationship between the ultraviolet light intensity irradiated to the photocatalyst filter and the acetaldehyde removal rate, b) is a graph showing the relationship. The test results show how the acetaldehyde removal rate changes depending on the distance between the photocatalyst filter and the light source (black light), and (a) shows the result of comparing the planar photocatalyst filter with the light source (black light). FIG. 6B is a cross-sectional view showing the positional relationship between the cylindrical photocatalyst filter and the light source (black light). The test result which investigated how an ultraviolet light intensity changes with the distance of a planar photocatalyst filter and a light source (black light) is shown, Comprising: (a) is a planar photocatalyst filter and a light source (black light) And (b) are graphs showing the relationship between the distance and the ultraviolet light intensity. Regarding the conventional photocatalytic deodorizing device using a planar photocatalytic filter and the photocatalytic deodorizing device of the present invention using a cylindrical photocatalytic filter, the implementation status of the test to see how the acetaldehyde residual rate in the test box changes FIG. We examined how the acetaldehyde residual rate in the test box changes, which was implemented for the conventional photocatalyst deodorizing device using a planar photocatalyst filter and the photocatalyst deodorizing device of the present invention using a cylindrical photocatalyst filter. It is a table | surface which shows a test result, Comprising: (a) is a table | surface which shows the conditions of the planar light filter and cylindrical filter which were used, (b) is a graph which shows the time change of the acetaldehyde persistence. It is a graph which shows the time change of the acetaldehyde residual rate in the box for a test of the conventional photocatalyst deodorizing apparatus using a planar photocatalyst filter, and the photocatalyst deodorizing apparatus of this invention using a cylindrical photocatalyst filter. It is a conceptual diagram which shows the implementation condition of the test which investigates the acetaldehyde residual rate in the box for a test changes with the number of peaks of a photocatalyst filter about the photocatalyst deodorizing apparatus of this invention using a cylindrical photocatalyst filter. It shows the test results of how the acetaldehyde residual rate in the test box changes with the number of peaks of the photocatalytic filter, which was carried out for the photocatalytic deodorizing apparatus of the present invention using a cylindrical photocatalytic filter 7A is a table showing the number of peaks of the photocatalytic filter used, and FIG. 7B is a table showing the relationship between the number of peaks of the cylindrical filter used and the time change of the acetaldehyde residual rate. The test result which investigated how the acetaldehyde residual rate in the test box changed about the photocatalyst deodorizing apparatus of this invention which used the cylindrical photocatalyst filter is shown, and (a) is acetaldehyde The table showing the time change of the survival rate, (b) is the graph. The test result which investigated the change of the acetaldehyde removal rate with respect to the flow velocity (air velocity) of the air in the conventional photocatalyst deodorizing apparatus using a planar photocatalyst filter is shown, and (a) is a table showing time change of acetaldehyde residual rate. , (B) is the graph. (A) is a figure which shows the flow-rate distribution of the air in the photocatalyst deodorizing apparatus using a cylindrical photocatalyst filter when not using a cover, (b) used the cylindrical photocatalyst filter when using a cover It is a figure which shows the flow-rate distribution of the air in the photocatalyst deodorizing apparatus of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

(Photocatalytic deodorizing apparatus of the first embodiment)
The whole structure of the photocatalyst deodorizing apparatus 1 which concerns on 1st Embodiment of this invention is shown in FIG. Moreover, the perspective view and end view seen from the upper direction of this photocatalyst deodorizing apparatus 1 are shown in FIG.2 and FIG.3, respectively.

  The photocatalyst deodorizing device 1 of the present embodiment corresponds to the case where the present invention is applied to the photocatalyst deodorizing device, but the present invention is not limited to this. The present invention is a photocatalyst device provided with a photocatalyst filter and a light source for emitting light (for example, ultraviolet light) for activating the photocatalyst and exhibiting a desired photocatalyst effect (effect possessed by the photocatalyst), other than the photocatalyst deodorizing device It is applicable to various apparatuses, such as a photocatalyst apparatus, for example, a photocatalyst sterilization (antibacterial) apparatus, a photocatalyst purification apparatus, and the like.

  As apparent from FIG. 1, the photocatalyst deodorizing device 1 according to the present embodiment includes the cylindrical photocatalytic filter 10 and the photocatalytic filter 10 disposed in the internal space 12 of the photocatalytic filter 10 (that is, ultraviolet light). ) And a tapered cover 30 which is disposed outside the photocatalyst filter 10 and which forms an introduction channel 31 extending along the photocatalyst filter 10 between the photocatalyst filter 10 and the black light 20 And have.

The photocatalytic filter 10 has a configuration in which the filter portion 11 is cylindrical, and titanium oxide (TiO ₂ ) as a photocatalyst is supported on the surface of a sheet-like non-woven fabric as a filter material. As shown in FIG. 15, the photocatalytic filter 10 is a pleated type having a large number of peaks, and the overall shape is cylindrical. Both ends of the photocatalytic filter 10 are open.

  The black light 20 is linear, and is disposed coaxially with the central axis (longitudinal axis) of the cylindrical photocatalytic filter 10 in the inner space 12 thereof. The entire black light 20 is accommodated in the internal space 12.

  The cover 30 is tapered such that its diameter gradually decreases from its upper end to its lower end, and is disposed on the outside of the cylindrical photocatalytic filter 10 coaxially with the central axis of the same. An introduction channel 31 is formed between the cover 30 and the photocatalyst filter 10. The cross-sectional area of the introduction channel 31 is set such that the flow velocity of the fluid to be treated (here, air) is substantially uniform over the entire surface of the photocatalytic filter 10. The air rectifying function is realized by the cover 30. The upper end of the introduction passage 31 of the cover 30 is a suction port P1 of air. The material of the cover 30 is not limited as long as the desired shape and strength can be maintained with respect to the pressure of the air flow applied at the time of operation. The cover 30 can be made of, for example, a synthetic resin.

  A cylindrical base member 40 is provided concentrically with the lower ends of the photocatalytic filter 10 and the cover 30. A cylindrical filter holding member 14 is fixed to the upper surface of the base member 40 so as to embed the lower portion thereof. A through hole 14 a is formed inside the filter holding member 14, and the through hole 14 a communicates with the internal space 12 of the photocatalytic filter 10. A blower 50 is incorporated below the inside of the base member 40. The blower 50 functions as a flow generation unit that generates a flow of air that is a fluid to be treated. The blower 50 incorporates a fan 51. The through hole 14 a of the filter holding member 14 and the space (the internal flow passage of the blower 50) in which the fan 51 incorporated in the blower 50 is disposed function as a flow passage of air. The outlet channel is in communication with the internal space 12 of the photocatalyst filter 10. The lower end of the outlet flow passage is an air outlet P2. The configuration of the blower 50 is well known, so the description thereof is omitted.

  A hollow support 24 extending upward in the interior space 12 is fixed to the base member 40. The lower end of the hollow support 24 is disposed inside and adjacent to the filter holding member 14 and extends upward parallel to the inner surface of the cylindrical filter holding member 14. A cylindrical filter holding member 13 is fixed to the upper end of the hollow support 24. The upper end of the hollow support 24 is disposed inside the filter holding member 14 and adjacent thereto. The upper and lower filter holding members 13 and 14 are in a mutually overlapping position at a predetermined interval, and are used to mount and hold the photocatalytic filter 10.

  The filter holding members 13 and 14 disposed at the upper and lower ends of the hollow support 24 are concentric with each other. The black light holding fixture 21 is attached downward to the filter holding member 13 located on the upper side by the holding fixture supporting member 23. The black light holding fitting 22 is mounted on the lower side of the filter holding member 14 directly below the black light holding fitting 21, that is, at a position overlapping the black light holding fitting 21. For this reason, the linear black light 20 can be disposed (mounted) in the internal space 12 coaxially with the photocatalyst filter 10 by locking the both ends thereof to the black light holding brackets 21 and 22, respectively.

  The base member 40 incorporates a lighting device (not shown) for the black light 20, and the lighting device is electrically connected to the upper and lower black light holding fittings 21 and 22 by a cable (not shown). Inside the hollow support column 24, a cable for electrically connecting the black light holding fitting 21 located on the upper side and the lighting device is accommodated.

  The cylindrical photocatalytic filter 10 is coaxially held by the same cylindrical filter holding members 13 and 14 coaxially arranged with the members 13 and 14. The photocatalytic filter 10 extends parallel to the black light 20 in the internal space 12 and is orthogonal to the base member 40.

  Cylindrical filter holding members 13 and 14 are concentrically fitted in the openings at the upper end and the lower end of the photocatalytic filter 10, respectively, and fixed in this state. The attachment of the photocatalytic filter 10 to the filter holding members 13 and 14 is performed by close contact by fitting. This is because when replacing the photocatalyst filter 10 used for a long time with a new photocatalyst filter 10, it is necessary to make the former removable. Here, since the upper end of the upper filter holding member 13 is closed, the upper end of the photocatalytic filter 10 is also closed. Both ends of the lower filter holding member 14 are open, and a through hole 14a is formed therein. The through hole 14a, together with the space in which the fan 51 inside the blower 50 is disposed, constitutes a lead-out channel, so the internal space 12 of the photocatalytic filter 10 is connected with the lead-out channel via the opening at the lower end thereof. It communicates with the outlet P2.

  By the action of the blower 50, the air as the fluid to be treated is, as shown by a thick arrow in FIG. 1, from the suction port P1 (inlet of the introduction channel 31) at the upper end of the photocatalyst deodorizing device 1 It enters the introduction channel 31 between 30 and passes through the photocatalyst filter 10 from the outside to the inside to reach the internal space 12. At this stage, the photocatalytic filter 10 deodorizes air. Thus, the deodorized air that has entered the internal space 12 reaches the outlet P2 through the lead-out flow path, that is, the through hole 14a of the filter holding member 14 and the internal flow path (not shown) of the blower 50, and the photocatalyst deodorizing device It is discharged to the outside of 1.

  Next, the test result implemented about the photocatalyst deodorizing apparatus which concerns on this invention mentioned above is demonstrated.

  FIG. 8 shows a configuration example of a photocatalyst deodorizing apparatus provided with a conventional planar photocatalyst filter as a comparative example to the present invention. As can be seen from FIG. 8, this conventional photocatalyst deodorizing apparatus has two planar photocatalyst filters and two black lights disposed in a casing having an inlet and an outlet. The two black lights are arranged in parallel in the vertical direction at intervals. A planar photocatalytic filter is disposed in front of the black lights, and a planar photocatalytic filter is disposed behind the black light so as to overlap with it. The two black lights and the two planar photocatalyst filters are parallel to one another.

  First, in a photocatalyst deodorizing apparatus (see FIG. 8) equipped with a conventional planar photocatalyst filter, it was examined by a test how the acetaldehyde removal rate changes depending on the intensity of ultraviolet light, as shown in FIG. 9 (a) (b) The results shown in were obtained. From this result, it was found that the removal rate of acetaldehyde increases as the intensity of ultraviolet light increases, and therefore, to enhance the deodorizing effect, it is preferable to increase the intensity of ultraviolet light to the photocatalytic filter. This test was conducted according to "JIS R 1701-2 Fine Ceramics-Test Method for Air Purification Performance of Photocatalytic Material-Part 2: Removal Performance of Acetaldehyde". The arrangement of the black light (light source) and the photocatalytic filter was set to be parallel to each other at an interval of 40 mm as shown in FIG.

  Moreover, in the photocatalyst deodorizing apparatus provided with the planar photocatalyst filter shown in FIG. 8, it was examined how the ultraviolet light intensity changes depending on the distance from the black light as a light source. The results shown in were obtained. From this result, it was found that the ultraviolet light intensity decreased as the distance from the black light as the light source increased. Therefore, as shown in FIG. 10 (b), it is preferable to form the photocatalytic filter in a cylindrical shape, and to arrange the black light as a light source inside the photocatalytic filter so as to be concentric with it. It can be confirmed that the UV light emitted from the entire circumference of the black light can be effectively used, as well as the light filter can be made substantially constant (uniform) over the entire surface of the photocatalytic filter. In this case, the distance between the photocatalyst filter and the black light as the light source is preferably as short as possible. This is because the intensity of ultraviolet light irradiated to the photocatalyst filter, that is, the deodorizing effect can be increased accordingly.

  From such a reason, in the photocatalyst deodorizing apparatus 1 according to the first embodiment, the photocatalyst filter 10 is formed into a cylindrical shape, and a linear black light 20 is coaxially arranged with the photocatalyst filter 10, and further, the photocatalyst filter 10 and the black The distance to the light 20 is as short as possible in consideration of the flow rate of air passing through the photocatalyst filter 10 and the like.

The photocatalyst deodorizing apparatus 1 according to the first embodiment in which the black light 20 is disposed coaxially with the center of the cylindrical photocatalyst filter 10 is actually manufactured, and the test box with a volume of 0.73 m ³ is provided. After filling 10 ppm of acetaldehyde, the photocatalyst deodorizing apparatus 1 was placed and operated therein, and the time change of the remaining concentration of acetaldehyde in the test box was measured (see FIG. 12). At the same time, as a comparative example, a photocatalyst deodorizing apparatus (see FIG. 8) equipped with a conventional planar photocatalyst filter is manufactured, and acetaldehyde in a test box is made in the same manner as the photocatalyst deodorizing apparatus 1 according to the present invention. The change over time of the remaining concentration was measured.

The test conditions at this time are as shown in FIG. That is, since the conventional photocatalyst deodorizing apparatus (FIG. 8) using a planar photocatalyst filter uses two 8 W black lights, the total power consumption is 16 W. In addition, the filter area of the planar photocatalyst filter is 0.08 m ² . On the other hand, since the photocatalyst deodorizing apparatus 1 according to the present invention uses one 8 W black light, the total power consumption is 8 W, and the filter area of the cylindrical photocatalyst filter 10 is 0.048 m ² .

  The test results are as shown in FIG. 13 (b) and FIG. That is, in the photocatalyst deodorizing apparatus 1 according to the present invention using the cylindrical filter 10, the remaining concentration of acetaldehyde in the test box became zero 10 minutes after the start of the test. On the other hand, in the photocatalyst deodorizing apparatus according to the comparative example using the planar filter, the remaining concentration of acetaldehyde in the test box became zero only 25 minutes after the start of the test. Thereby, it was found that the deodorizing effect of the photocatalyst deodorizing apparatus 1 according to the present invention is much higher than that of the photocatalyst deodorizing apparatus according to the comparative example. Moreover, in the photocatalyst deodorizing apparatus 1 according to the present invention, the power consumption is 1/2 of that of the photocatalyst deodorizing apparatus according to the comparative example, and the number of black lights 20 used is 1/2 that of the photocatalyst deodorizing apparatus according to the comparative example. Therefore, it was confirmed that the convenience of the photocatalyst deodorizing apparatus 1 according to the present invention is very high.

Furthermore, as shown in FIG. 15, the influence which it gives to the deodorizing effect at the time of forming a pleat in the cylindrical photocatalyst filter 10 was investigated. First, as shown in FIG. 16A, in the photocatalyst deodorizing apparatus 1 of the present invention using the cylindrical photocatalyst filter 10, the number of peaks of the cylindrical photocatalyst filter 10 (circumferential length: 20 cm) is 150, We made 100, 75 and 50 pieces. The number of peaks per unit length (cm) of these photocatalytic filters 10 is 8 peaks / cm, 5 peaks / cm, 3.75 peaks / cm, as shown in FIG. It will be 5 mountains / cm. Then, 10 ppm of acetaldehyde is filled in a test box with a volume of 0.73 m ³ , and then the photocatalyst deodorizing device 1 equipped with these photocatalyst filters 10 is arranged and operated, and the remaining concentration of acetaldehyde in the test box is Time change was measured.

  As a result, results as shown in FIG. 16 (b) and FIG. 17 were obtained. That is, the cylindrical photocatalytic filter 10 having 100 peaks, in other words, the cylindrical photocatalytic filter 10 provided with peaks such that the number of peaks per unit length is 5 peaks / cm, has the most deodorizing effect. Was high. The next highest deodorizing effect was the cylindrical photocatalyst filter 10 with 75 peaks (the number of peaks per unit length of 3.75 peaks / cm), followed by the second highest deodorizing effect. What is the number of peaks is 50 (the number of peaks per unit length is 2.5 peaks / cm) of cylindrical photocatalyst filter 10, the number of peaks is 150 (the length is the worst) The number of crests of the mountain was the cylindrical photocatalyst filter 10 of 8 mountains / cm).

  What can be estimated from this test result is that, when pleats are formed on the cylindrical photocatalyst filter 10, if the number of peaks is too large, the interval between the pleats becomes very narrow and ultraviolet light from the black light 20 is difficult to be irradiated As a result, the degree of activation (deodorizing effect) of the photocatalyst does not increase as the filter area increases. Also, conversely, when the number of mountains is small, the interval between the pleats becomes so wide and the ultraviolet light from the black light is easily irradiated, but the filter area becomes so small, resulting in the degree of activation of the photocatalyst (photocatalyst The effect is that it does not rise in proportion to the increase of the ultraviolet light intensity. Therefore, it is preferable to select and determine the number of peaks per unit length so that the pleat spacing and the filter area may be well balanced. In the first embodiment, as described above, the number of mountains per unit length is more preferably 5 mountains / cm.

  Furthermore, the effect of the flow velocity (air velocity) of the air passing through the cylindrical photocatalytic filter 10 on the deodorizing effect is described in JIS R 1701-2 Fine ceramics-Test method for air purification performance of photocatalytic material-Part 2: Removal performance of acetaldehyde It investigated by the method according to it. The filter inlet concentration of acetaldehyde was set to 1 ppm, and the removal rate of acetaldehyde was examined while changing the flow velocity (air velocity) of air passing through the photocatalyst filter 10. Then, a result as shown in FIG. 18 was obtained.

  As can be seen from FIGS. 18 (a) and 18 (b), the flow velocity (air velocity) of the air passing through the photocatalyst filter 10 has a great influence on the acetaldehyde removal rate (that is, the deodorizing effect). The smaller the), the greater the acetaldehyde removal rate (i.e. the deodorizing effect). This means that the longer the acetaldehyde comes in contact with the photocatalyst, the larger the removal rate (that is, the deodorizing effect), which is sensible.

  As described above, it has been found that the flow velocity (air velocity) of the air passing through the photocatalyst filter 10 has a great influence on the acetaldehyde removal rate (that is, the deodorizing effect). Therefore, using fluid analysis software, the photocatalyst deodorizing device according to the present invention The flow velocity distribution of air in 1 was investigated. The results are shown in FIG.

  FIG. 19A shows the flow velocity distribution of air in the photocatalyst deodorizing apparatus using the cylindrical photocatalyst filter 10 with no cover attached. FIG. 19 (b) shows the flow velocity distribution of air in the photocatalyst deodorizing device 1 of the present invention using the cylindrical photocatalyst filter 10 to which the tapered cover 30 is attached.

  As can be seen from FIG. 19A, when one end of the cylindrical photocatalyst filter 10 is closed and the other end is opened, air is sucked by the blower 50 from the open end, the air passing through the cylindrical photocatalyst filter 10 The flow velocity (wind velocity) is not uniform, and varies widely depending on the location. For this reason, since the deodorizing effect also varies greatly depending on the place, the advantage of the cylindrical photocatalyst filter 10 capable of efficiently receiving the ultraviolet light from the black light 20 can not be fully utilized. In order to make the flow velocity (air velocity) of the air passing through the cylindrical photocatalytic filter 10 as uniform as possible, the tapered cover 30 has a variation of the photocatalytic effect within the desired range (preferably, over the entire surface of the photocatalytic filter 10). Is provided in order to suppress in the range which can be said to be substantially equal. In fact, as can be seen from FIG. 19 (b), by providing the tapered cover 30, the flow velocity (air velocity) of the air is even closer than in FIG. 19 (a). Thus, the cover 30 plays a very important role (rectifying function).

  As described above, in the photocatalyst deodorizing apparatus 1 according to the first embodiment of the present invention, the photocatalyst filter 10 is cylindrical with both ends open, and the linear black light 20 (light source is disposed in the internal space 12 ) Is irradiated with activating light (ultraviolet light), and since the linear black light 20 is disposed coaxially with the cylindrical photocatalyst filter 10, the entire circumference of the black light 20 is It is possible to effectively irradiate the entire surface of the photocatalytic filter 10 with ultraviolet light emitted radially from the above.

  Also, during operation of the photocatalyst deodorizing device 1, air as the fluid to be treated passes through the photocatalyst filter 10 from the introduction flow path 31 formed between the cover 30 and the photocatalyst filter 10 and enters the internal space 12, The sectional area of the introduction channel 31 is such that the variation of the flow velocity of the air is suppressed over the entire surface of the photocatalytic filter 10 as compared to the case without the cover 30. The flow velocity of air is adjusted to be as even as possible over the entire surface. For this reason, the air contacts the entire surface of the photocatalytic filter 10 in a nearly uniform state, so that it is possible to exert the deodorizing effect substantially uniformly over the entire surface of the photocatalytic filter 10.

  Further, the introduction flow path 31 is formed by the cover 30 and the photocatalytic filter 10, and the cross-sectional area of the introduction flow path 31 is adjusted so that the flow velocity of air is as even as possible over the entire surface of the photocatalytic filter 10. Even in the configuration in which the black light 20 is disposed inside the cylindrical photocatalyst filter 10, the deodorizing effect does not significantly fluctuate depending on the location of the photocatalyst filter 10.

  Furthermore, since the black light 20 is disposed inside the cylindrical photocatalyst filter 10 and the cover 30 is disposed outside the photocatalyst filter 10, these can be integrated to form a photocatalyst module (modularization). It is easy. Therefore, a plurality of the photocatalyst modules are combined, for example, juxtaposed in the longitudinal direction of the photocatalyst filter 10 (series connection), or juxtaposed in the direction orthogonal to the longitudinal direction of the photocatalyst filter 10 (parallel connection) It is possible to combine two (serial-parallel connection, parallel-serial connection), and to easily meet various needs.

(Photocatalytic deodorizing apparatus of the second embodiment)
Next, a photocatalyst deodorizing apparatus 1A according to a second embodiment of the present invention will be described. The whole structure of the photocatalyst deodorizing apparatus 1A which concerns on 2nd Embodiment is shown in FIG.

  As is clear from FIG. 4, the photocatalyst deodorizing apparatus 1A of the second embodiment is configured by combining four photocatalyst deodorizing apparatuses 1 according to the first embodiment described above in parallel.

  As shown in FIG. 4, the photocatalyst deodorizing apparatus 1A according to the second embodiment uses the photocatalyst deodorizing apparatus 1 according to the first embodiment described above as the photocatalyst deodorizing module M1, and four photocatalyst deodorizing modules M1 are used. They are connected by module holding members 62 in parallel in a row. The four photocatalyst deodorizing modules M1 are coupled in the same posture and in the same direction. In addition, the outlets P2 on the base member 40 side of the four photocatalyst deodorizing modules M1 are mutually connected by the joining member 60 and are collected at the outlet (common fluid outlet) P2A. Therefore, after the air before deodorization is simultaneously sucked into the inside of the photocatalyst deodorizing apparatus 1A from the suction ports P1 possessed by each of the four photocatalyst deodorizing modules M1, and the deodorization processing is carried out in parallel, the air after deodorization is single It can be discharged from one blow out port P2A.

  The suction ports P1 of the four photocatalyst deodorizing modules M1 may be mutually connected using a merging member (not shown) to be a common fluid outlet.

  In addition to the effects possessed by the photocatalyst deodorizing device 1 according to the first embodiment described above, the photocatalyst deodorizing device 1A according to the second embodiment having the above configuration has a large scale (large capacity) of air volume to be processed. There is an effect that it can be easily realized.

  Although the photocatalyst deodorizing apparatus 1A according to the second embodiment is configured by combining four photocatalyst deodorizing modules M1 including the photocatalyst deodorizing apparatus 1 according to the first embodiment described above, the present invention is not limited thereto. It is not limited. The number of photocatalyst deodorizing modules M1 to be combined may be two, three, five or more. The number of photocatalyst deodorizing modules M1 can be arbitrarily changed as needed.

(Photocatalytic deodorizing apparatus of the third embodiment)
The whole structure of the photocatalyst deodorizing apparatus 1B which concerns on 3rd Embodiment of this invention is shown in FIG.

  As apparent from FIG. 5, the photocatalyst deodorizing apparatus 1B of the third embodiment is configured by combining two photocatalyst deodorizing apparatuses 1 according to the first embodiment described above in series.

  As shown in FIG. 5, the photocatalyst deodorizing apparatus 1B uses the photocatalyst deodorizing apparatus 1 according to the first embodiment described above as the photocatalyst deodorizing module M1, and two photocatalyst deodorizing modules M1 are connected in series. . The two photocatalyst deodorizing modules M1 are disposed in the same posture and in the same direction, and are mutually connected so as to connect the outlet P2 of the upstream photocatalyst deodorizing module M1 to the inlet P1 of the downstream photocatalyst deodorizing module M1 ing. Illustration of the coupling member used for coupling of the photocatalyst deodorizing module M1 is omitted. In this configuration, the air before deodorization is sucked from the suction port P1 into the photocatalyst deodorizing module M1 on the upstream side, and the air deodorized is further sent to the photocatalyst deodorizing module M1 on the downstream side, where it is deodorized again It is processed. Thus, the air subjected to the two-stage deodorization is discharged from the outlet P2A of the downstream photocatalytic deodorizing module M1.

  In addition to the effects possessed by the photocatalyst deodorizing device 1 according to the above-described first embodiment, the photocatalyst deodorizing device 1B according to the third embodiment having the above-described configuration can reliably be used even when the air to be treated is heavily contaminated. Has the effect of being able to deodorize. This is because two photocatalyst deodorizing modules M1 can perform two-stage deodorizing processing on the same air.

  In the photocatalyst deodorizing apparatus 1B according to the third embodiment, the number of photocatalyst deodorizing modules M1 to be combined can be arbitrarily changed as needed, and may be three or four or more.

(Photocatalytic deodorizing apparatus of the fourth embodiment)
The whole structure of the photocatalyst deodorizing apparatus 1C which concerns on 4th Embodiment of this invention is shown in FIG.

  As apparent from FIG. 6, the photocatalyst deodorizing apparatus 1C of the fourth embodiment is configured using the photocatalyst deodorizing module M2 having a configuration in which the entire length of the photocatalyst deodorizing apparatus 1 according to the first embodiment described above is elongated. It is. Although the number of photocatalyst deodorizing modules M2 used is one, the module M2 allows the black light 20 used in the above-described photocatalyst deodorizing module M1 to be used instead of the longer black light 20.

  For example, the commercially available black light 20 has a total length of 287 mm when the power consumption is 8 W, but when the power consumption is 20 W, the total length is 580 mm, and when the power consumption is 40 W, the total length is 1198 mm. Therefore, it is necessary to set the total length of the photocatalyst deodorizing module M2 in accordance with the total length of the black light 20 to be used.

  As described above, the photocatalyst deodorizing apparatus 1C according to the fourth embodiment extends the entire length of the photocatalyst deodorizing apparatus 1 according to the above-described first embodiment to cope with the black light 20 with larger power consumption. Since the photocatalyst deodorizing module M2 is used, in addition to the effects possessed by the photocatalyst deodorizing apparatus 1 according to the first embodiment described above, the number of photocatalyst deodorizing modules M2 is set even if the amount of air to be treated is large. There is an effect that deodorization can be performed reliably without increasing the amount, that is, without complicating the configuration of the photocatalyst deodorizing device 1C. Since the photocatalyst deodorizing module M1 having a long length is provided, air can be deodorized simultaneously in a wide range.

  Further, by combining the photocatalyst deodorizing module M2 with the above-described photocatalyst deodorizing module M1, it is possible to more flexibly cope with various needs.

(Photocatalytic deodorizing apparatus of the fifth embodiment)
The whole structure of photocatalyst deodorizing apparatus 1D which concerns on 5th Embodiment of this invention is shown in FIG.

  As apparent from FIG. 7, the photocatalyst deodorizing apparatus 1D of the fifth embodiment corresponds to the photocatalyst deodorizing apparatus 1 according to the first embodiment described above configured in combination as three photocatalyst deodorizing modules M1 in series. However, in the point that the number of the black lights 20 to be used is one, it differs from the structure which only three combined photocatalyst deodorizing modules M1 mentioned above. That is, in the three photocatalyst deodorizing modules M1, one black light 20 is shared by the three photocatalyst deodorizing modules M1.

  The configuration of the photocatalyst deodorizing apparatus 1D corresponds to that in which three photocatalyst deodorizing modules M1 described above are connected in series as shown in FIG. The three photocatalyst deodorizing modules M1 are arranged in the same posture and in the same direction, and are coupled to connect the outlet P2 of the upstream photocatalyst deodorizing module M1 to the inlet P1 of the central photocatalyst deodorizing module M1, The blowout port P2 of the photocatalyst deodorizing module M1 is coupled to the suction port P1 of the downstream photocatalyst deodorizing module M1. In addition, illustration of the coupling member used for coupling of the photocatalyst deodorizing module M1 is omitted.

  In this configuration, the air before deodorization is sucked from the suction port P1 into the upstream photocatalyst deodorizing module M1, where the air deodorized is further sent to the central photocatalyst deodorizing module M1, where it is deodorized again. Be done. The air deodorized by the central photocatalytic deodorizing module M1 is further sent to the downstream photocatalytic deodorizing module M1, where the third deodorizing process is performed. The air deodorized in three stages is discharged from the outlet P2 of the downstream photocatalytic deodorizing module M1. The activation of the photocatalyst filter 10 of each photocatalyst deodorizing module M1 is performed by the common black light 20. Thus, the number of black lights 20 can be reduced by adjusting the number of photocatalyst deodorizing modules M1 in accordance with the entire length of the black lights 20.

  In addition to the effects possessed by the photocatalyst deodorizing device 1 according to the above-described first embodiment, the photocatalyst deodorizing device 1D according to the fifth embodiment having the above-described configuration can reliably be used even when the air to be treated is heavily contaminated. Has the effect of being able to deodorize. This is because three photocatalyst deodorizing modules M1 can perform three steps of deodorizing processing on the same air. Furthermore, there is also an effect that the entire configuration of the photocatalyst deodorizing device 1D is simplified.

  In the photocatalyst deodorizing apparatus 1D according to the fifth embodiment, the number of photocatalyst deodorizing modules M1 to be combined can be arbitrarily changed as needed, and may be two, four, or five or more.

(Modification)
The above-described first to fifth embodiments show examples embodying the present invention. Accordingly, the present invention is not limited to these embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-mentioned embodiment, although a nonwoven fabric is used as a raw material of a photocatalyst filter, the present invention is not limited to this. Materials other than non-woven fabric can also be used as long as they can carry a photocatalyst and can be pleated. In the case where the filter area may be slightly reduced in order of cost, the manufacturing cost may be reduced by omitting the pleats from the photocatalyst filter.

  Moreover, in the embodiment described above, the cover is tapered, but the present invention is not limited to this. If the cross-sectional area of the introduction channel between the cover and the photocatalytic filter can be set so that the flow velocity of the fluid to be treated (here, air) is as close as possible across the entire surface of the photocatalytic filter, the shape of the cover is It is optional.

  In the above-described embodiment, one end of the cylindrical photocatalytic filter is closed and air is sucked out from the other open end, but the present invention is not limited to this. Both ends of the cylindrical photocatalyst filter may be opened to suck air from the both ends.

M1, M2 Photocatalyst Deodorization Module P1 Suction Port P2, P2A Outlet 1, 1A, 1B, 1C, 1D Photocatalyst Deodorizing Device 10 Photocatalyst Filter 11 Filter Part 12 Internal Space 13, 14 Filter Holding Member 14a Through Hole 20 Black Light 21, 22 Black light holding bracket 23 holding bracket support member 24 hollow support 30 cover 31 introduction flow path 40 base member 50 blower 51 fan 60 merging member 62 module holding member

Claims (7)

Cylindrical pleated photocatalyst filter,
A linear light source, which is disposed concentrically with the photocatalyst filter in the interior space of the photocatalyst filter, for irradiating the photocatalyst filter with activation light;
A tapered cover which is disposed outside the photocatalyst filter and which forms an introduction flow path extending along the photocatalyst filter with the photocatalyst filter;
A lead-out channel formed in communication with the internal space of the photocatalyst filter;
A flow generation unit configured to generate a flow of the fluid to be processed in the introduction channel , the inner space, and the outlet channel;
The upstream end of the photocatalyst filter is closed, and the downstream end is open, and the flow generation means is connected to the downstream end,
The cross-sectional area of the introduction channel in the direction orthogonal to the photocatalytic filter gradually decreases from the start end to the end of the introduction channel according to the tapered shape of the cover, and the process fluid is It is set so as to suppress fluctuations due to the location of the photocatalyst filter in the flow velocity when passing through the photocatalyst filter,
In operation, after the fluid to be treated is introduced into the introduction channel formed between the photocatalyst filter and the cover, the fluid passes through the photocatalyst filter and enters the internal space, and further the outlet channel is formed. The photocatalyst apparatus characterized by passing through and discharging | emitting to the exterior. 2. The photocatalyst device according to claim 1, wherein a cross-sectional area of the introduction flow path in a direction orthogonal to the photocatalytic filter is set such that the flow velocity of the fluid to be treated is substantially uniform over the entire surface of the photocatalytic filter . Further comprising a base member including the flow generating means;
The photocatalyst device according to claim 1 or 2 , wherein the downstream end of the photocatalyst filter and the downstream end of the light source are fixed to the base member . A plurality of photocatalyst devices according to any one of claims 1 to 3 are included as a photocatalyst module, and a common fluid inlet or a common fluid outlet is provided to the plurality of photocatalyst modules. photocatalyst device according to. The photocatalyst device according to claim 4 , wherein a plurality of the photocatalyst modules are connected in series so that the plurality of photocatalyst modules are connected to mutually connect the outlet channel and the introduction channel . A plurality of the photocatalytic modules are combined so as to mutually connect the outlet channel and the introduction channel thereof, and the plurality of photocatalyst modules are connected in series;
The photocatalyst apparatus according to claim 4 , wherein any one of the light sources is shared by a plurality of the photocatalyst modules . 5. The photocatalyst device according to claim 4, wherein a plurality of the photocatalyst modules are connected in parallel such that the outlet flow channel and the introduction channel are connected to each other, and the plurality of photocatalyst modules are connected in parallel .

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