Air purification sterilization module having improved sterilization efficiency and reduced maintenance costs

Abstract

The present invention relates to an air purification sterilization module having improved sterilization efficiency and reduced maintenance costs, the air purification sterilization module comprising: a photocatalyst sheet part disposed at the frontmost end in a direction in which air enters, and causing photocatalysis; a photocatalyst filter part disposed at the rear end of the photocatalyst sheet part in the direction in which air enters, and causing photocatalysis; and a light source part disposed at the rear end of the photocatalyst filter part in the direction in which air enters, and radiating light to the photocatalyst sheet part and the photocatalyst filter part.

Description

Air purification sterilization module that improves sterilization efficiency and reduces maintenance costs

[0001] This embodiment relates to an air purification sterilization module that improves sterilization efficiency and reduces maintenance costs.

[0002] The content described in this section merely provides background information for the present embodiment and does not constitute prior art.

[0003] In recent years, as population growth and industrialization have rapidly progressed, air pollution has become more severe and has a negative impact on human activities.

[0004] In the air, there are super bacteria, H1N2 (new flu / avian flu, etc.), infectious pathogens, salmonella, E. coli, staphylococcus aureus, listeria, legionella, norovirus, and mold, as well as NO, which is the cause of bad smell. x (nitrogen oxides), SO x The content of various harmful compounds such as sulfur oxides, volatile organic compounds (VOCs), formaldehyde (sick building syndrome), ammonia, toluene, or acetaldehyde (the main cause of cigarette odor) is increasing.

[0005] In particular, as seen in the COVID-19 situation, inhaling air contaminated with bacteria droplets without disinfection can have adverse effects on the human body.

[0006] Accordingly, air purifiers or air sterilizers are now being installed in homes, public accommodations (hotels, motels, etc.), shopping centers (department stores, supermarkets, etc.), cultural facilities (museums, exhibition halls, concert halls, etc.), medical institutions (hospitals, nursing homes, etc.), educational institutions (schools, kindergartens, academies, etc.), offices, and commercial buildings to purify polluted air. Air purifiers or air sterilizers allow people to breathe purified, clean air, creating a more pleasant living environment.

[0007] Air purification and sterilization modules typically utilize photocatalytic materials. Photocatalytic materials use light as an energy source to promote catalytic reactions (oxidation-reduction reactions) that decompose various bacteria and pollutants.

[0008] However, conventional air purification sterilization modules using photocatalytic materials have a structurally relatively low decomposition (purification) efficiency, and despite this, have the inconvenience of requiring relatively high maintenance costs.

[0009] One embodiment of the present invention aims to provide an air purification sterilization module that improves sterilization efficiency and reduces maintenance costs.

[0010] According to one aspect of the present embodiment, a photocatalyst filter is provided, which comprises a photocatalyst sheet part arranged at the front end in the direction in which air is introduced and causing a photocatalytic reaction, a photocatalyst filter part arranged at the rear end of the photocatalyst sheet part in the direction in which air is introduced and causing a photocatalytic reaction, and a light source part arranged at the rear end of the photocatalyst filter part in the direction in which air is introduced and irradiating light to the photocatalyst sheet part and the photocatalyst filter part, wherein the photocatalyst filter part includes a plurality of through holes to allow air introduced therein to pass therethrough, and a photocatalyst is coated on the surface thereof, and a substrate part implemented as a plurality of regions, and a space in which the substrate part can be installed, and a frame for installing and fixing the substrate part.

[0011] According to one aspect of the present embodiment, the photocatalyst sheet portion is characterized in that it is implemented as a sheet including a plurality of through holes having a diameter that is relatively smaller than the through holes implemented in the substrate portion.

[0012] According to one aspect of the present embodiment, the photocatalyst sheet portion is characterized in that a photocatalyst is coated on the surface of the sheet.

[0013] According to one aspect of the present embodiment, the sheet is characterized in that it is implemented with a silica material.

[0014] According to one aspect of the present embodiment, the substrate portion is characterized in that it is implemented with a ceramic material.

[0015] According to one aspect of the present embodiment, the light source unit is characterized by including a plurality of light sources and a frame.

[0016] According to one aspect of the present embodiment, the light source is characterized in that at least one is formed at each position facing each area within the substrate.

[0017] According to one aspect of the present embodiment, the frame provides a space where a light source can be positioned, and is characterized in that it is implemented at each position facing each area within the substrate.

[0018] According to one aspect of the present embodiment, the light source unit is characterized in that all light sources facing an area corresponding to one row or column among each area within the substrate unit operate simultaneously.

[0019] According to one aspect of the present embodiment, the photocatalyst is titanium dioxide (TiO2), zinc oxide (ZnO), cadmium sulfide (CdS), tungsten oxide (WO3), black titanium dioxide (TiO 2-x ), carbon doped titanium dioxide (Carbon doped TiO2) or bismuth vanadate (BiVO4).

[0020] According to one aspect of the present embodiment, an air purification sterilization module is provided, characterized by including a pre-filter that is initially arranged in the direction in which air flows in to filter foreign substances contained in the air, a fine dust filter that is positioned at the rear end of the pre-filter in the direction in which air flows in to filter foreign substances of relatively small volume that the pre-filter cannot filter, the photocatalytic filter, and a fan that allows air to flow in one direction continuously or as needed.

[0021] As described above, according to one aspect of the present embodiment, there is an advantage of having excellent sterilization efficiency and reducing maintenance costs.

[0022] FIG. 1 is a drawing illustrating the configuration of an air purification sterilization module according to one embodiment of the present invention.

[0023] FIG. 2 is a drawing showing the configuration of a photocatalytic filter according to the first embodiment of the present invention.

[0024] FIG. 3 is a drawing showing an example of operation of a photocatalytic filter according to the first embodiment of the present invention.

[0025] FIG. 4 is a drawing showing the configuration of a photocatalytic filter unit according to the first embodiment of the present invention.

[0026] FIG. 5 is a drawing showing the configuration of a light source unit according to the first embodiment of the present invention.

[0027] FIG. 6 is a drawing illustrating the operation of a light source unit according to the first embodiment of the present invention.

[0028] Figures 7 and 8 are drawings showing the configuration of a photocatalytic filter unit according to the second embodiment of the present invention.

[0029] Figure 9 is a drawing showing the configuration of a photocatalytic filter according to the second embodiment of the present invention.

[0030] Fig. 10 is a drawing showing the configuration of a light reflector according to a second embodiment of the present invention.

[0031] Fig. 11 is a drawing showing an example of operation of a light reflector according to a second embodiment of the present invention.

[0032] Fig. 12 is a drawing showing the configuration of a photocatalytic filter according to a third embodiment of the present invention.

[0033] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. Throughout the description of each drawing, similar reference numerals have been used to designate similar components.

[0034] Terms such as first, second, A, and B may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term "and / or" includes a combination of multiple related items described herein or any of multiple related items described herein.

[0035] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0036] The terminology used in this application is solely for the purpose of describing specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. It should be understood that terms such as "comprise" or "have" in this application do not preclude the presence or possibility of addition of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification.

[0037] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0038] Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0039] In addition, each configuration, process, procedure or method included in each embodiment of the present invention may be shared within a scope that is not technically inconsistent with each other.

[0040] FIG. 1 is a drawing illustrating the configuration of an air purification sterilization module according to one embodiment of the present invention.

[0041] Referring to FIG. 1, an air purification sterilization module (100) according to one embodiment of the present invention includes a pre-filter (110), a fine dust filter (120), a photocatalytic filter (130), and a fan (140).

[0042] The air purification sterilization module (100) is installed in an air purification device or air conditioner, and filters foreign substances or fine dust contained in the incoming air, decomposes bacteria or organic matter, and eliminates unpleasant odors. The air purification sterilization module (100) includes a photocatalytic filter (130) described below, thereby achieving excellent sterilization efficiency while reducing maintenance costs.

[0043] The pre-filter (110) is initially placed in the direction in which air flows into the air purification and sterilization module (100) to filter foreign substances contained in the air. The pre-filter (110) filters relatively large foreign substances such as fur, lint, hair, or large dust particles.

[0044] The fine dust filter (120, HEPA Filter) is located at the rear end of the pre-filter (110) in the direction in which air flows into the air purification sterilization module (100), and filters relatively small foreign substances that the pre-filter (110) cannot filter.

[0045] The photocatalytic filter (130) is positioned at the rear end of the fine dust filter (120) in the direction in which air flows into the air purification sterilization module (100), and uses a photocatalytic reaction to decompose bacteria or organic matter and remove unpleasant odors in the air. The photocatalytic filter (130) can perform the aforementioned operation by being implemented as illustrated in FIGS. 2 to 13, which will be described later.

[0046] The fan (140) allows air to be introduced into the air purification sterilization module (100) in one direction, either continuously or as needed. The fan (140) allows air to be introduced into the air purification sterilization module (100) in one direction by sucking in air in one direction or blowing air in the opposite direction.

[0047] FIG. 2 is a drawing showing the configuration of a photocatalytic filter according to the first embodiment of the present invention, and FIG. 3 is a drawing showing an example of operation of a photocatalytic filter according to the first embodiment of the present invention.

[0048] Referring to FIG. 2, a photocatalyst filter (130) according to the first embodiment of the present invention includes a photocatalyst sheet portion (210), a photocatalyst filter portion (220), and a light source portion (230).

[0049] The photocatalyst sheet portion (210) is arranged at the very front end of the photocatalyst filter (130) in the direction in which air is introduced, and causes a photocatalytic reaction. The photocatalyst sheet portion (210) is made of a silica material, and is made of a sheet including numerous through-holes whose diameters are significantly smaller than those of the photocatalyst filter portion (220). The surface of the photocatalyst sheet portion (210) is coated with a photocatalyst, and thus induces a photocatalytic reaction. However, as described above, the photocatalyst sheet portion (210) is arranged at the very front end of the photocatalyst filter (130) and includes through-holes whose diameters are relatively significantly smaller, and therefore its sterilization or organic matter decomposition efficiency is relatively lower than that of the photocatalyst filter portion (220), but the time for air to pass through is relatively long, and thus it has a superior deodorizing effect than the filter portion (220).

[0050] The photocatalytic filter unit (220) is positioned at the rear end of the photocatalytic sheet unit (210) in the direction in which air flows in, thereby causing a photocatalytic reaction. The photocatalytic sheet unit (220) is implemented as illustrated in Fig. 4.

[0051] FIG. 4 is a drawing showing the configuration of a photocatalytic filter unit according to the first embodiment of the present invention.

[0052] Referring to FIG. 4, the photocatalytic filter unit (220) according to the first embodiment of the present invention includes a substrate unit (410) and a frame (420).

[0053] The substrate portion (410) includes a plurality of through holes (415) having a relatively larger diameter than the through holes implemented in the photocatalyst sheet portion (210), thereby allowing air to pass therethrough. The substrate portion (410) is implemented with a film or the like to implement an area of ​​a certain area, and is implemented as a plurality of areas within the frame (420). The surface of the substrate portion (410) also induces a photocatalytic reaction as the photocatalyst is coated thereon. Since the substrate portion (410) is arranged relatively closer to the light source portion (230) than the photocatalyst sheet portion (210), it has a relatively superior sterilization or organic matter decomposition efficiency.

[0054] The frame (420) has a space inside where a substrate portion (410) implemented as a plurality of areas can be mounted, thereby mounting and fixing the substrate portion (410). As illustrated in Fig. 4, the substrate portions (410) can be mounted on most of the area of ​​the frame (420), such as 5*5.

[0055] Referring again to FIG. 2, the photocatalyst sheet portion (210) and the photocatalyst filter portion (220) may be coated with the following photocatalyst material to cause a photocatalytic reaction. The photocatalyst material to be coated on the photocatalyst sheet portion (210) and the photocatalyst filter portion (220) is a component that causes a photocatalytic reaction in response to ultraviolet rays, and may be implemented as titanium dioxide (TiO2), zinc oxide (ZnO), cadmium sulfide (CdS), or tungsten oxide (WO3). Alternatively, the photocatalyst material to be coated on the photocatalyst sheet portion (210) and the photocatalyst filter portion (220) is a component that causes a photocatalytic reaction in response to visible light, and may be implemented as black titanium dioxide (TiO 2-x), carbon doped titanium dioxide (Carbon Doped TiO2) or bismuth vanadate (BiVO4). Furthermore, after the photocatalyst material is coated on the photocatalyst sheet portion (210) and the photocatalyst filter portion (220), a preset metal component may be additionally deposited. The preset metal component includes platinum (Pt), gold (Au), silver (Ag), palladium (Pd), ruthenium (Ru), cobalt (Co), nickel (Ni), iron (Fe), copper (Cu), or chromium (Cr). When the preset metal component is additionally deposited on the photocatalyst material, the photocatalytic efficiency may be improved as the recombination of electrons and holes in the photocatalyst is suppressed.

[0056] The light source unit (230) is positioned at the rear end of the photocatalyst filter unit (220) in the direction in which air is introduced and irradiates light to the photocatalyst sheet unit (210) and the photocatalyst filter unit (220). The light source unit (230) irradiates light in the ultraviolet wavelength range or visible light depending on the type of photocatalyst material coated on the photocatalyst sheet unit (210) and the photocatalyst filter unit (220). As illustrated in Fig. 3, the light source unit (230) irradiates light toward the photocatalyst filter unit (220), and the irradiated light passes through the through hole formed in the substrate unit (410) in the photocatalyst filter unit (220) and reaches the photocatalyst sheet unit (210).

[0057] The light source unit (230) is implemented as shown in FIG. 5 and can operate as shown in FIG. 6.

[0058] FIG. 5 is a drawing showing the configuration of a light source unit according to the first embodiment of the present invention, and FIG. 6 is a drawing showing the operation of a light source unit according to the first embodiment of the present invention.

[0059] Referring to FIG. 5, the light source unit (230) according to the first embodiment of the present invention includes a plurality of light sources (510) and a frame (520).

[0060] The light source (510) is implemented on the surface facing the photocatalyst filter unit (220) within the frame (520) and irradiates ultraviolet light or visible light to the photocatalyst filter unit (220). The light source (510) is formed at each position facing each region within the substrate unit (410) within the frame (520) and irradiates light to each region within the substrate unit (410). At least one light source (510) is formed at each position facing each region within the substrate unit (410) and can irradiate light to each region.

[0061] The frame (520) provides a space where a light source (510) can be positioned. Since the frame (520) is implemented at each position facing each area within the substrate portion (410) within the photocatalytic filter portion (220), the light source (510) can irradiate light to the corresponding area from each position.

[0062] At this time, the light sources (510a or 510b) facing the area corresponding to one row or column among the areas in the substrate (410) operate as shown in FIG. 6, either all at once or alternately for each row or column.

[0063] As shown in Fig. 6a, all light sources (510a, 510b) do not operate continuously, but operate in a PWM (Pulse-Width Modulation) manner, but operate by repeatedly turning On / Off.

[0064] Alternatively, as illustrated in Fig. 6b, all light sources (510a, 510b) do not operate continuously, but operate in a PWM (Pulse-Width Modulation) manner, and operate with different output intensities. That is, all light sources (510a, 510b) operate by repeating sections in which they irradiate light relatively strongly and sections in which they irradiate light relatively weakly.

[0065] Or, as illustrated in Fig. 6c, all light sources (510a, 510b) do not operate continuously, but operate in a PWM (Pulse-Width Modulation) manner, such that when one of the light sources (510a) and the light sources (510b) outputs light, the other does not output light. That is, the light sources (510a) and the light sources (510b) operate similarly to Fig. 6a, but operate (output light) alternately by distinguishing between the time when they are operating and the time when they are not operating.

[0066] As the light sources (510a, 510b) operate as described above, power consumption can be reduced, efficiency can be improved, and thermal load on the photocatalyst can be reduced compared to when all the light sources (510) continuously output light. When the light sources (510a, 510b) operate as described above, sufficient light diffusion time can be secured while bringing about the effect of intermittent light irradiation. When light is not irradiated or relatively weak light is irradiated, electrons and holes on the catalyst surface can move further instead of recombine or cause other oxidation reactions (sterilization and organic matter decomposition). In addition, when the light sources (510a, 510b) operate as described above, it can have a positive effect on preventing thermal decomposition of the photocatalyst and protecting the activity and lifespan of the catalyst.

[0067] The photocatalytic filter unit (130) comprises the aforementioned configuration, thereby utilizing a photocatalytic reaction to decompose bacteria or organic matter and remove odors from the air. In this process, the photocatalytic filter unit (130) can improve sterilization efficiency and reduce maintenance costs.

[0068] Figures 7 and 8 are drawings illustrating the configuration of a photocatalyst filter unit according to a second embodiment of the present invention. The photocatalyst filter (130) may include a photocatalyst filter unit (220) according to the second embodiment of the present invention instead of the photocatalyst filter unit (220) according to the first embodiment of the present invention.

[0069] Referring to FIG. 8, the photocatalytic filter unit (220) according to the second embodiment of the present invention may include a frame (810) instead of a frame (420).

[0070] As illustrated in Fig. 7, when light for inducing a photocatalytic reaction is irradiated from a light source unit (230) to a photocatalytic filter unit (220), there are frequent cases where the light is irradiated to parts (710a to 710d) other than the photocatalytic filter unit (220) adjacent to the photocatalytic filter unit (220). This causes a weakening of the photocatalytic reaction. In recognition of this problem, the photocatalytic filter unit (220) includes a frame (810).

[0071] The frame (810) is implemented with a material that reflects light and has a shape that protrudes from each end in the direction in which light is incident on it and in the direction away from it (y-axis in FIG. 8(a)). Alternatively, the frame (810) may be implemented with a material that reflects light and may include a reflector (not shown) that protrudes from each end in the direction in which light is incident on it and in the direction away from it (y-axis in FIG. 8(a)). The frame (810) may have a shape that directly protrudes in the aforementioned direction or includes a reflector (not shown) that protrudes in the corresponding direction, so that all light irradiated to parts (710a to 710d) other than the photocatalytic filter unit (220) as illustrated in FIG. 8(b) can be reflected and transmitted into the photocatalytic filter unit (220). Accordingly, the frame (810) can secure superior air purification efficiency.

[0072] FIG. 9 is a drawing showing the configuration of a photocatalytic filter according to the second embodiment of the present invention, FIG. 10 is a drawing showing the configuration of a light reflector according to the second embodiment of the present invention, and FIG. 11 is a drawing showing an example of operation of a light reflector according to the second embodiment of the present invention.

[0073] Referring to FIG. 9, a photocatalyst filter (130) according to a second embodiment of the present invention further includes a light reflection portion (240) in addition to a photocatalyst sheet portion (210), a photocatalyst filter portion (220) (according to the first or second embodiment) and a light source portion (230).

[0074] The light reflector (240) is positioned at the frontmost end of the photocatalyst filter (130) in the direction in which air flows in, and reflects light irradiated from the light source (230) and passing through the photocatalyst sheet (210) to the photocatalyst sheet (210).

[0075] The light reflector (240) includes a sheet (1010) and a bead portion (1020).

[0076] The sheet (1010) contains numerous perforations to allow air to pass through, while providing a space for the bead portion (1020) to be positioned.

[0077] The bead portion (1020) is arranged on the surface of the sheet (1010) facing the photocatalyst sheet portion (210) to retroreflect light incident thereon toward the photocatalyst sheet portion (210). As illustrated in FIG. 10, most of the light irradiated from the light source portion (230) reaches the photocatalyst filter portion (220) and the photocatalyst sheet portion (210) and induces a photocatalytic reaction. However, some of the light irradiated from the light source portion (230) directly transmits through the photocatalyst filter portion (220) and the photocatalyst sheet portion (210). If such light directly transmits through both components (210, 220), it may cause a problem of lowering the air purification efficiency of the photocatalyst filter (130). Therefore, the bead portion (1020) is arranged on the aforementioned surface of the sheet (1010). The bead portion (1020) can be implemented as a glass bead, and as illustrated in FIG. 11, retroreflects light incident on it. Accordingly, the bead portion (1020) reflects light transmitted through the photocatalyst sheet portion (210) back to the photocatalyst sheet portion (210), thereby allowing a photocatalytic reaction to occur relatively smoothly in the photocatalyst sheet portion (210).

[0078] Fig. 12 is a drawing showing the configuration of a photocatalytic filter according to a third embodiment of the present invention.

[0079] Referring to FIG. 12, a photocatalyst filter (130) according to a third embodiment of the present invention may include a photocatalyst filter unit (220) and a light source unit (230) according to the third embodiment of the present invention instead of the photocatalyst filter unit (220) and the light source unit (230) according to the first embodiment of the present invention.

[0080] The photocatalyst filter unit (220) includes a substrate unit (410) implemented with a plurality of regions, but implemented with relatively small regions. As illustrated in FIG. 4, if the substrate unit (410) in the photocatalyst filter unit (220) according to the first embodiment of the present invention includes 5*5 regions, the substrate unit (410) in the photocatalyst filter unit (220) according to the third embodiment of the present invention may include relatively small regions, for example, 3*3 regions. The light source unit (230) may also include a light source only at a position facing the regions implemented in the substrate unit (410).

[0081] The photocatalytic filter unit (220) includes a frame (420) in a portion other than the portion where the area within the substrate unit (410) is formed, thereby blocking the air flow.

[0082] By including a photocatalyst filter unit (220) and a light source unit (230) each having a relatively small number of areas and light sources, the photocatalyst filter (130) can reduce power consumption while reducing cost by reducing the area within the substrate unit (410).

[0083] Although the photocatalytic filter (130) according to the third embodiment of the present invention may have lower operating performance than the photocatalytic filter (130) according to the first embodiment of the present invention when operated only once, the operating performance does not show a significant difference when operated repeatedly.

[0084] Accordingly, the photocatalytic filter (130) according to the third embodiment of the present invention can reduce cost and maintenance costs.

[0085] The above description is merely an example of the technical idea of ​​the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present embodiment, but rather to explain it, and the scope of the technical idea of ​​the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

[0086]

[0087] CROSS-REFERENCE TO RELATED APPLICATION

[0088] This patent application claims priority under 35 USC § 119(a) of U.S. Patent Application No. 10-2024-0109216, filed in Korea on August 14, 2024, the entire contents of which are incorporated by reference herein. Furthermore, this patent application claims priority in countries other than the United States for the same reasons, the entire contents of which are incorporated by reference herein.

Claims

1. A photocatalytic sheet portion that is positioned at the frontmost end in the direction of air inflow and causes a photocatalytic reaction; A photocatalyst filter section that is placed at the rear end of the photocatalyst sheet section in the direction in which air flows in and causes a photocatalytic reaction; and It includes a light source unit that is arranged at the rear end of the photocatalyst filter unit in the direction in which air is introduced and irradiates light to the photocatalyst sheet unit and the photocatalyst filter unit, The above photocatalytic filter part, A substrate portion having a plurality of through holes to allow air to pass through it, a photocatalyst coated on the surface, and implemented as a plurality of regions; A photocatalytic filter characterized in that it includes a frame that has a space in which the substrate part can be settled and fixes the substrate part.

2. In paragraph 1, The above photocatalyst sheet portion, A photocatalytic filter characterized in that it is implemented as a sheet including a plurality of through holes whose diameter is relatively smaller than the through holes implemented in the above substrate portion.

3. In paragraph 2, The above photocatalyst sheet portion, A photocatalyst filter characterized in that a photocatalyst is coated on the surface of the sheet.

4. In paragraph 2, The above sheet, A photocatalytic filter characterized by being implemented with silica material.

5. In paragraph 1, The above substrate portion, A photocatalytic filter characterized by being implemented with a ceramic material.

6. In paragraph 1, The above light source unit, A photocatalytic filter characterized by comprising a plurality of light sources and frames.

7. In paragraph 6, The above light source is, A photocatalytic filter characterized in that at least one is formed at each facing position in each region within the above substrate.

8. In paragraph 7, The above frame is, A photocatalytic filter characterized in that it provides a space where a light source can be positioned and is implemented at each location facing each area within the substrate.

9. In paragraph 1, The above light source unit, A photocatalytic filter characterized in that all light sources facing an area corresponding to one row or column among the areas within the above substrate operate simultaneously or operate alternately for each row or column.

10. In paragraph 1 or paragraph 3, The above photocatalyst is, Titanium dioxide (TiO2), zinc oxide (ZnO), cadmium sulfide (CdS), tungsten oxide (WO3), black titanium dioxide (TiO 2-x ), a photocatalytic filter characterized by being implemented with carbon doped titanium dioxide (Carbon doped TiO2) or bismuth vanadate (BiVO4).

11. A pre-filter that is initially placed in the direction in which air flows in to filter out foreign substances contained in the air; A fine dust filter located at the rear end of the pre-filter in the direction of air inflow, which filters relatively small-volume foreign substances that the pre-filter cannot filter; The photocatalytic filter of paragraph 1; and A fan that allows air to flow into the interior continuously or in one direction as needed. An air purification sterilization module characterized by including:

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