WO2022145925A1

WO2022145925A1 - Photocatalytic sterilization apparatus using led lamp uv light

Info

Publication number: WO2022145925A1
Application number: PCT/KR2021/019946
Authority: WO
Inventors: 방승섭; 장해영
Original assignee: 방승섭; 장해영
Priority date: 2020-12-28
Filing date: 2021-12-27
Publication date: 2022-07-07
Also published as: KR102266703B1

Abstract

The present invention provides a photocatalytic sterilization apparatus using LED lamp ultraviolet light, the photocatalytic sterilization apparatus having a prolonged service life due to use of the LED lamp ultraviolet light, enabling generation of more radicals by increasing the area for a photochemical reaction, and increasing the emission efficiency of radicals by reducing the blowing impediment due to a decreased volume of an LED lamp and thus increasing the sterilization capacity. The photocatalytic sterilization apparatus using an LED lamp ultraviolet light, according to a suitable embodiment of the present invention, comprises: a housing having an air intake port at one location and a first air discharge port at another location; a photocatalytic sterilization module having a sterilization duct for a reaction to take place between LED ultraviolet light and a photocatalytic material to kill organic substances, such as bacteria, viruses, etc., the sterilization duct being inserted into the housing to be fixedly installed; a blower that generates a blowing force to suck in outside air from the air intake port to inject same into the sterilization duct; and an air filter installed at a side of the air intake port to remove fine dusts and contaminants from the air.

Description

Photocatalytic sterilization device using LED lamp UV rays

The present invention relates to a photocatalytic sterilization device, in particular, by using the ultraviolet light of an LED lamp, the service life is prolonged, the generation of more radicals is possible by increasing the area of the photochemical reaction, and the volume of the LED lamp is small and the blow obstruction is reduced by reducing the radical It relates to a photocatalytic sterilization device using ultraviolet rays of an LED lamp to increase the sterilization power by increasing the emission efficiency of

Photocatalytic reaction is being put to practical use in various fields such as home appliances, roads, vehicles, air treatment, medical treatment, and water quality treatment. For example, various volatile organic compounds, formaldehyde, etc., which are commonly referred to as sick house syndrome and old house syndrome, are decomposed and removed using photocatalytic reaction. As such, photocatalytic reaction is one of the representative future technologies that are in the spotlight in terms of energy and environment. Accordingly, it is currently being actively used in the energy and environmental fields. It is being actively used to decompose and remove harmful organic matter and air pollutants because it can easily remove pollutants spread all over the earth with only light without much energy. For example, a photocatalytic purification device is used for the purpose of purifying and sterilizing indoor air.

As the background technology of the present invention, as Korean Patent Registration No. 10-0874130, a 'purifying device using a photocatalyst' is proposed. It is configured to be connected in series or in parallel by installing each UV lamp and ozone (O3) lamp in an independent tube, independent of each wavelength, and the inner end of the spiral photocatalyst plate into which each lamp is inserted is wrinkled to form air Alternatively, the contact area with water is further increased, and at the same time, wrinkles are formed at the end contacting the lamp to increase the contact area with the lamp to prevent damage to the lamp. However, the background art has a problem in that the sterilization power is lowered by the spiral photocatalyst plate causing an airflow obstruction and lowering the exhaust efficiency of the fan.

[Prior art literature]

[Patent Literature]

(Patent Document 1) Korean Patent Registration No. 10-0874130

The present invention uses LED lamp ultraviolet rays to prolong the service life, generate more radicals by increasing the area of photochemical reaction, and decrease the volume of the LED lamp to reduce blowing disturbances. It is an object of the present invention to provide a photocatalytic sterilization device using ultraviolet light from an LED lamp to be increased.

A photocatalytic sterilization device using an LED lamp ultraviolet light according to a preferred embodiment of the present invention,

a housing having an air inlet at one location and a first air outlet at another location;

a photocatalytic sterilization module having a sterilization duct that causes a reaction between LED ultraviolet rays and a photocatalytic material to kill organic substances such as bacteria and viruses, and is inserted into the housing and fixedly installed;

a blower for generating a blowing force, sucking outside air from an air intake port, and injecting it into the sterilization duct;

and an air filter installed on the side of the air intake to remove fine dust and contaminants in the air.

In addition, the housing includes a housing body having a sterilization module storage room, a housing lower cover installed openly and openably on a lower portion of the housing body and having the air inlet, and an openable and openable installation on the upper portion of the housing body and the first It is characterized in that it consists of a housing upper cover having an air outlet.

In addition, the housing body is characterized in that it has a predetermined radius of curvature on both left and right sides to form a circular column shape.

In addition, an air filter holder for mounting an air filter is further installed on the inner surface of the housing lower cover, and an air filter replacement opening for replacing the air filter is formed on one side of the air filter holder.

In addition, the photocatalyst sterilization module includes a photocatalytic sterilization chamber of a trapezoidal cross section by a front plate and a rear plate that are parallel to each other by a certain height, and a trapezoidal cross-section by an inclined plate that is connected to the front plate and the rear plate and inclined at a predetermined angle, but photocatalyst material on all inner surfaces a sterilization duct coated with a blast inlet to the lower part of the photocatalytic sterilization chamber; a photocatalyst inclined scattering plate and a photocatalyst front scattering plate disposed inside each of the both swash plates and the front plate of the sterilization duct and coated with a photocatalytic material to induce scattering of ultraviolet rays; One or more LED ultraviolet emitters arranged in the photocatalytic sterilization room, the LED strip installation rod having a circular cross section over a certain length, the LED strip being circularly disposed on the outer circumferential surface of the LED strip installation rod to generate LED ultraviolet rays; It is characterized in that it includes a; LED ultraviolet emitter support installed on the rear plate to fix and support the LED ultraviolet emitter.

In addition, the LED ultraviolet emitter support is characterized in that the emitter fastening clamps are further installed to be fastened to and separated from the LED ultraviolet emitter support with bolts in order to facilitate replacement of the LED ultraviolet emitter.

In addition, the photocatalyst inclined scattering plate and the photocatalyst front scattering plate are characterized in that the steel plate is bent to increase scattering efficiency, so that the ridges each having an angle of 60 degrees have a certain width and are continuously connected to form a wrinkled shape.

In addition, the LED ultraviolet emitter is characterized in that a pair is installed symmetrically left and right in the photocatalytic sterilization room.

In addition, the inclined plate is characterized in that installed inclined at an angle of 50 degrees with respect to the rear plate.

In addition, it is characterized in that the outer peripheral surface of the LED strip installation rod is coated with titanium dioxide as a photocatalytic material.

In addition, the back plate is characterized in that the photocatalyst back scattering plate coated with a photocatalyst material that causes the LED ultraviolet rays generated from the LED strip and the photocatalyst half is further installed.

In addition, for photocatalyst scattering and diffusion, the mountain shape of the photocatalyst inclined scattering plate is disposed in a direction perpendicular to the mountain shape of the photocatalyst front scattering plate. It is characterized in that it is arranged to coincide with the direction.

In addition, for internal cleaning and management of the sterilization duct, an opening for duct management is formed on the front plate of the sterilization duct, and the photocatalyst front scattering plate base on which the photocatalyst front scattering plate is mounted is detachably installed in the duct management opening. characterized in that

In addition, in order to increase the sterilization and decomposition efficiency by partially recirculating the photocatalyst product, a photocatalyst recirculation outlet is further formed at the upper portion of the sterilization duct, and between the housing and the sterilization duct is in communication with the photocatalyst recirculation outlet and the blower inlet of the blower It is characterized in that a photocatalyst recirculation passage is provided.

According to the photocatalytic sterilization device using the LED lamp ultraviolet rays of the present invention, the installation safety is increased because the housing has a double pillar shape on both sides. In addition, a photocatalyst recirculation path is provided between the housing and the sterilization duct to increase sterilization efficiency.

In addition, the LED strip installed on the LED UV emitter uses a UV LED of 200 to 300 nm to increase the replacement cycle and lifespan. In addition, by applying the sterilization duct and the photocatalyst scattering plate, the area of photochemical reaction is increased, so more radicals (OH-) can be generated, and the volume of the LED lamp is reduced, so the blowing resistance of the blowing fan is reduced and the emission efficiency of radicals is decreased. It has the advantage of increasing the sterilization power.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.

1 is a perspective view of a photocatalytic sterilization apparatus according to an embodiment of the present invention;

Figure 2 is an exploded perspective view of Figure 1;

Fig. 3 is a front view of Fig. 1;

Fig. 4 is a cross-sectional view taken along line A-A of Fig. 3;

Fig. 5 is a cross-sectional view taken along line B-B of Fig. 3;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 3 ;

7 is an enlarged view of the main part of the photocatalyst front scattering plate shown in FIG. 5;

FIG. 8 is a cross-sectional view in which a rear scattering plate is additionally installed in the photocatalytic sterilizer shown in FIG. 1;

9 is a state diagram in which the emitter fastening clamp is separated from the LED ultraviolet emitter applied in FIG. 1;

10 is a longitudinal cross-sectional view of one side of FIG.

[Explanation of code]

10: photocatalyst sterilizer

12: housing

121: housing body

122: housing lower cover

123: housing top cover

20: photocatalyst sterilization module

210: sterilization duct

220: photocatalyst inclined scattering plate

230: photocatalyst front scattering plate

240: LED ultraviolet emitter

250: LED ultraviolet emitter support

260: radiator fastening clamp

30: blower

40: air filter

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The photocatalytic sterilization apparatus 10 according to this embodiment is provided with a housing 12 having an air inlet 122a at one location and a first air outlet 123a at another location as shown in FIGS. 1 to 3 . In this embodiment, the air inlet 122a is formed in the form of a long hole in the lower portion of the housing 12 and is arranged in plurality, and the first air outlet 123a is in the form of a long hole in the upper surface and the front surface of the upper side of the housing 12. It is arranged in multiple numbers.

The housing 12 includes a housing body 121 having a sterilization module storage chamber 121a therein, and a housing lower cover that is installed in a lower portion of the housing body 121 to be opened and closed by screw fastening and has the air intake port 122a. 122 and a housing upper cover 123 installed on the upper portion of the housing body 121 to be opened and closed by screw fastening and having the first air outlet 123a. Here, the housing body 121 has a predetermined radius of curvature R on the left and right sides as shown in FIG. 4 to form a circular column shape. As described above, the housing body 121 has a beautiful appearance as if an arch column is formed by forming a radius of curvature R on both sides of the housing body 121 . In addition, the housing lower cover 122 and the housing upper cover 123 can be separated by disassembling the screws, so that the photocatalytic sterilization module 20 to be described later can be easily inserted into the sterilization module storage chamber 121a in the housing 12 and installed. have.

A second air outlet 122b may be additionally installed on the upper front side of the housing body 121 . Therefore, in this embodiment, the purified air is discharged through the first air outlet 123a and the second air outlet 122b.

A plurality of moving wheels 5 may be installed on the lower surface of the housing 12 as shown in FIG. 3 . Therefore, the photocatalytic sterilizer 10 can be easily moved through the housing 12 side moving wheel 5 .

An air filter holder 124 for mounting the air filter 40 is installed on the inner surface of the housing lower cover 122 . The air filter holder 124 has an air filter replacement opening 125 for replacing the air filter 40 on one side as shown in FIG. 1 . Therefore, it is possible to easily install the air filter 40 by simply inserting it into the air filter holder 124 .

4 and 5 , the photocatalytic sterilization module 20 is installed inside the housing 12 . The photocatalyst sterilization module 20 has a sterilization duct 210 and generates LED ultraviolet rays inside it to oxidize hydroxyl radicals (OH-) (hereinafter referred to as 'radicals') generated by a reaction between photocatalytic materials. It decomposes and destroys organic substances such as bacteria and viruses. The photocatalytic sterilization module 20 will be described later.

A blower 30 is provided for sucking the outside air in the room where the photocatalytic sterilization device 10 is disposed and injecting it into the sterilization duct 210 . The blower 30 is mounted in the blowing chamber 217 on the lower side of the sterilization duct 210 as shown in FIGS. 2 and 6 . The blower 30 generates blowing force, sucks in outside air through the air intake port 122a on the housing lower cover 122 side, and injects it into the sterilization duct 210 , and then the upper front surface of the housing upper cover 123 and the housing 12 . It is discharged through the first and second air outlets (123a, 122b) formed in the .

An air filter 40 for removing fine dust and contaminants in the air is installed on the side of the air intake 122a of the housing lower cover 122 . In this embodiment, the air filter 40 is accommodated in a replaceable air filter holder 124 installed on the inner surface of the housing lower cover (122). The air filter 40 may be any one or more of a pre-filter, a HEPA filter, and an ultra-high performance filter (ULPA, Ultra Low Penetration Air filter). As described above, the photocatalytic sterilizer 10 is equipped with an air filter 40, so that fine dust filtration of indoor air is also performed. Of course, in the present invention, the air filter 40 may be replaced with an antibacterial filter or an activated carbon filter or used together with them.

2 to 6, the photocatalytic sterilization module 20 is a sterilization duct 210 that provides a blowing passage and a photocatalytic reaction chamber, both sides of the swash plate 213 and the front plate 211 of the sterilization duct 210. At least one disposed and coated with a photocatalytic material to emit ultraviolet rays to the photocatalytic inclined scattering plate 220 and the photocatalyst front scattering plate 230, the photocatalytic inclined scattering plate 220 and the photocatalytic front scattering plate 230 for light scattering and diffusion The LED UV emitter 240 and the LED UV emitter support 250 for supporting the LED UV emitter 240 in the sterilization duct 210 are included.

The sterilization duct 210 is connected to the front plate 211 and the rear plate 212 and the front plate 211 and the rear plate 212 parallel to each other by a predetermined height by a swash plate 213 inclined at a predetermined angle. It is composed of a photocatalytic sterilization chamber 214 having a trapezoidal cross section. Preferably, all inner surfaces of the sterilization duct 210 are coated with a photocatalytic material to increase the photocatalytic reaction area. The inclined plate 213 is inclined at an angle of 50 degrees with respect to the rear plate 212 to further promote the light reaction. This is because, when it is greater than 50 degrees, the loss of ultraviolet rays leaving the photocatalytic sterilization chamber 214 is increased, and when it is less than 50 degrees, sufficient light diffusion of ultraviolet rays cannot be obtained. The sterilization duct 210 is made of a corrosion-resistant stainless steel plate in this embodiment, but is not limited to such a metal material. In addition, the sterilization duct 210 is formed with a blower inlet 214a at which the outlet of the blower 30 is located as shown in FIGS. 2 and 4 as a lower portion of the photocatalytic sterilization chamber 214 . Therefore, when the blower 30 is driven, a blowing flow is generated into the photocatalytic sterilization chamber 214 .

For internal cleaning and management of the sterilization duct 210, an opening 211a for duct management is formed on the front plate 211 of the sterilization duct 210 as shown in FIG. A photocatalyst front scattering plate base 232 on which the plate 230 is mounted is detachably installed.

The photocatalyst inclined scattering plate 220 and the photocatalyst front scattering plate 230 are formed by bending a stainless steel plate so that the

ridges

220a and 230a each having a wrinkle angle θ are continuously connected with a certain width to form a wrinkled shape. In this embodiment, the

ridges

220a and 230a form a wrinkle angle θ of 60 degrees so that light scattering and diffusion are efficiently performed in the sterilization duct 210 . This means that when the wrinkle angle (θ) is greater than 60 degrees, the loss of ultraviolet rays generated from the LED strip 242 of the LED ultraviolet emitter 240 out of the photocatalytic sterilization chamber 214 is large, and when it is less than 60 degrees, the ultraviolet rays are sufficient. This is because light diffusion cannot be obtained.

Furthermore, for photocatalytic scattering and diffusion, the ridges 220a of the photocatalyst inclined scattering plate 220 are disposed in a direction perpendicular to the ridges 230a of the photocatalyst front scattering plate 230, and the photocatalyst front scattering plate 230 ridges ( The longitudinal direction of 230a) is preferably arranged to coincide with the blowing direction of the blower 30 in order to minimize the resistance of the air flow.

As shown in FIG. 8 , a photocatalyst rear scattering plate 270 coated with a photocatalyst material that generates half of the LED ultraviolet rays and the photocatalyst generated from the LED strip 242 may be further installed on the rear plate 212 in order to increase the sterilization ability.

The LED ultraviolet emitter 240 is a photocatalytic sterilization room ( 214) is located. The outer peripheral surface of the LED strip installation rod 241 is preferably coated with a photocatalytic material. In this embodiment, a pair of LED ultraviolet emitters 240 are symmetrically positioned in the photocatalytic sterilization chamber 214 to increase the amount of radiation. LED UV rays generated from the LED strip 242 may have a wavelength in the range of 200 to 300 nm.

The LED UV emitter support 250 is installed on the rear plate 212 to fix and support the LED UV emitter 230 . Here, the LED ultraviolet emitter support 250 has a radiator fastening clamp 260 that is fastened to and separated from the LED ultraviolet emitter support 250 with a bolt 261 to facilitate replacement of the LED ultraviolet emitter 230 . have.

On the other hand, in order to increase the efficiency of sterilization and decomposition by partial recirculation of the photocatalyst product, a photocatalyst recirculation outlet 215 is further formed on the upper portion of the sterilization duct 210 as shown in FIGS. 2 and 3, and the housing 12 and the sterilization duct Between the 210, a photocatalyst recirculation outlet 215 and a photocatalyst recirculation passage 13 communicating with the air inlet 301 of the blower 30 may be provided (see FIGS. 5 and 10).

Titanium dioxide (TiO ₂ ) was used as the photocatalytic material applied in this example. Titanium dioxide has a higher oxidizing power than chlorine or ozone, so it has excellent sterilization power, and has the ability to decompose all organic substances into carbon dioxide and water. As a photocatalyst, titanium dioxide has excellent durability and abrasion resistance, and does not change itself because it functions as a catalyst. However, the present invention is not limited to titanium dioxide (TiO ₂ ), and other known photocatalytic materials (ZnO, CdS, ZrO2, V2O3, WO3, perovskite-type composite metal oxide (SrTiO3), etc.) may be applied.

The operation of the photocatalytic sterilizer configured in this way will be described.

First, when the operation button 129 disposed on the front upper part of the housing 12 is turned on, the blower 30 is driven to start blowing and the LED strip 242 on the LED ultraviolet emitter 240 side is also shown. As shown in 5, ultraviolet (S) is generated.

Therefore, the blowing flow is generated inside the sterilization duct 210 to which the outlet of the blower 30 is connected. At this time, outside air (contaminants, bacteria, viruses, etc.) is sucked through the air inlet 122a of the housing cover 122 .

In addition, the ultraviolet rays generated from the LED strip 242 of the LED ultraviolet emitter 240 are emitted and collide with the inner surface of the sterilization duct 210 as well as the photocatalytic inclined scattering plate 220 and the photocatalytic inclined scattering plate 200 . Electrons are formed from the coated titanium dioxide to generate strong oxidizing power, and hydroxyl radicals (-OH) and superoxide (-O2) are generated to oxidize organic compounds such as pollutants, bacteria and viruses contained in inhaled outdoor air. , decomposes and kills.

Therefore, dust contained in the outside air through the air intake port 122a of the housing cover 122 is primarily filtered through the air filter 40, and then organic materials such as bacteria and viruses are decomposed and killed by oxidation power. Accordingly, the air from which dust is removed and organic substances such as viruses are decomposed and purified is discharged through the first air outlet 123a and the second air outlet 122b.

In this process, more radicals (OH-) are generated due to the increase in the area of the photochemical reaction by the titanium dioxide coated on the inner surface of the sterilization duct 210, the photocatalyst inclined scattering plate 220 and the photocatalyst front scattering plate 230. .

In addition, since the volume of the LED ultraviolet emitter 240 is small, the blower 30 reduces the blown obstruction, and the emission efficiency of radicals (OH-) is increased, so that the sterilization power is increased.

In addition, the present invention uses an LED-type photocatalyst, and the replacement cycle of the LED strip 242 is longer, and thus has an advantage in that the lifespan of the LED strip 242 is increased several times longer than that of the conventional screw-type or filter-type photocatalyst.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but only by the claims appended hereto.

Claims

a housing 12 having an air intake port 122a at one location and a first air outlet port 123a at another location;

A photocatalytic sterilization module 20 having a sterilization duct 210 that causes a reaction between LED ultraviolet rays and a photocatalytic material to kill organic substances such as bacteria and viruses, and is inserted into the housing 12 and fixedly installed;

a blower (30) for generating blowing force to suck in outside air from the air intake and injecting it into the sterilization duct (210);

and an air filter 40 installed on the side of the air intake to remove fine dust and contaminants in the air;

The photocatalytic sterilization module 20 is

A photocatalytic sterilization chamber of a trapezoidal cross-section by a front plate 211 and a rear plate 212 parallel to each other by a certain height, and an inclined plate 213 that is connected to the front plate 211 and the rear plate 212 and inclined at a predetermined angle a sterilization duct 210 including a 214, all inner surfaces of which are coated with a photocatalyst material, and a blower inlet 214a is formed in the lower portion of the photocatalytic sterilization chamber 214;

A photocatalyst inclined scattering plate 220 and a photocatalyst front scattering plate 230 disposed inside each of the both inclined plates 213 and the front plate 211 of the sterilization duct 210 and coated with a photocatalytic material to induce scattering of ultraviolet rays )class;

It consists of an LED strip installation rod 241 having a circular cross section over a certain length, an LED strip 242 that is circularly disposed on the outer peripheral surface of the LED strip installation rod 241 and generates LED ultraviolet rays, and is disposed in the photocatalytic sterilization room 214. one or more LED ultraviolet emitters 240;

A photocatalytic sterilization device using ultraviolet light from an LED lamp, characterized in that it includes a; an LED ultraviolet emitter support 250 that is installed on the rear plate 212 and fixedly supports the LED ultraviolet emitter 230.
The method of claim 1,

The housing 12 includes a housing body 121 having a sterilization module receiving chamber 121a, and a housing lower cover 122 that is installed openly and openably on the lower portion of the housing body 121 and has the air intake port 122a. and a housing upper cover (123) that is openably installed on the upper part of the housing body (121) and has the first air outlet (123a).
3. The method of claim 2,

The housing body 121 has a predetermined radius of curvature (R) on both left and right sides to form a circular column shape.
3. The method of claim 2,

An air filter holder 124 for mounting the air filter 40 is further installed on the inner surface of the housing lower cover 122 , and the air filter holder 124 has one side for replacement of the air filter 40 . A photocatalytic sterilization device using ultraviolet light from an LED lamp, characterized in that an air filter replacement opening 125 is formed.
The method of claim 1,

In order to facilitate the replacement of the LED UV emitter 230 in the LED UV emitter support 250, a radiator fastening clamp 260 that is bolted to and separated from the LED UV emitter support 250 is further installed. A photocatalytic sterilization device using ultraviolet light from an LED lamp.
The method of claim 1,

The photocatalyst inclined scattering plate 220 and the photocatalyst front scattering plate 230 bend steel plates to increase scattering efficiency, so that the ridges 220a and 230a each having an angle of 60 degrees have a certain width and are continuously connected to form a wrinkle shape. Photocatalytic sterilization device using LED lamp ultraviolet light, characterized in that.
The method of claim 1,

The LED UV emitter 240 is a photocatalytic sterilization device using an LED lamp UV, characterized in that a pair is symmetrically installed in the photocatalytic sterilization room 214 .
The method of claim 1,

The swash plate 213 is a photocatalytic sterilization device using an LED lamp, characterized in that it is installed inclined at an angle of 50 degrees with respect to the rear plate 212.
The method of claim 1,

A photocatalytic sterilization device using ultraviolet light from an LED lamp, characterized in that titanium dioxide (TiO 2 ) is coated on the outer peripheral surface of the LED strip installation rod 241 as a photocatalytic material.
The method of claim 1,

Photocatalytic sterilization using ultraviolet light of an LED lamp, characterized in that the rear plate 212 is further provided with a photocatalyst rear scattering plate 270 coated with a photocatalytic material that causes LED ultraviolet rays generated from the LED strip 242 and a photocatalyst half Device.
7. The method of claim 6,

For photocatalytic scattering and diffusion, the ridges 220a of the photocatalyst inclined scattering plate 220 are disposed in a direction perpendicular to the ridges 230a of the photocatalyst front scattering plate 230, and the ridges of the photocatalyst front scattering plate 230 ( 230a) A photocatalytic sterilization device using ultraviolet light from an LED lamp, characterized in that the longitudinal direction is arranged to coincide with the blowing direction of the blower 30 in order to minimize the resistance of the air flow.
12. The method of claim 11,

In order to clean and manage the interior of the sterilization duct 210, an opening 211a for duct management is formed on the front plate 211 of the sterilization duct 210, and the photocatalyst front scattering plate 230 is formed in the opening 211a for duct management. ), a photocatalyst front scattering plate base 232 on which is mounted is detachably installed.
12. The method of claim 11,

In order to increase the sterilization and decomposition efficiency by partially recirculating the photocatalyst product, a photocatalyst recirculation outlet 215 is further formed on the upper portion of the sterilization duct 210, and between the housing 12 and the sterilization duct 210, photocatalyst recirculation A photocatalytic sterilization device using ultraviolet light from an LED lamp, characterized in that the photocatalyst recirculation passage 13 is provided in communication with the exhaust port 215 and the air intake port 301 of the blower 30 .