KR20160113355A

KR20160113355A - High efficiency photocatalyst filter

Info

Publication number: KR20160113355A
Application number: KR1020150037368A
Authority: KR
Inventors: 최규진
Original assignee: 서울바이오시스 주식회사
Priority date: 2015-03-18
Filing date: 2015-03-18
Publication date: 2016-09-29

Abstract

An invention for a high efficiency photocatalytic filter is disclosed. The disclosed invention includes: a housing in which a flow path through which a fluid passes is formed; A screw rotating body rotatably installed in the flow path; A photocatalyst layer formed on the surface of the screw rotating body; And a light source module for irradiating light to the photocatalyst layer.

Description

[0001] HIGH EFFICIENCY PHOTOCATALYST FILTER [0002]

The present invention relates to a high-efficiency photocatalytic filter, and more particularly, to a high-efficiency photocatalytic filter used to perform an air purification and sterilization function using a photocatalytic reaction.

Photochemical reaction, which is a combination of photocatalyst and ultraviolet ray, is generally used for air purification and sterilization because of its excellent sterilizing action and deodorizing action. In particular, photocatalyst can be used semi-permanently, can be operated stably and harmlessly to human body, and unlike other pollution prevention technologies, it is useful technology without secondary pollution.

Basically, the air treatment using a photocatalyst includes a method using a wide range of ultraviolet rays that react with a photocatalyst, and they generate hydroxyl radicals and excess oxide ions that have the effect of oxidizing volatile organic compounds and removing adsorbed microorganisms on the surface of the catalyst .

One of the common photocatalysts used in air conditioning systems is titanium dioxide (TiO ₂ ). When light of a specific wavelength is impinged on titanium dioxide, the electrons of the substance's valence band are excited into the conduction band. As a result, the movement of the electrons becomes free, and this electron energy is used to divide the surrounding water or oxygen molecules into hydroxyl radicals and superoxide ions.

Hydroxyl radicals are stronger than chlorine, ozone, and peroxides, and are one of the most powerful oxidizers, but as a result they tend to disappear easily. The oxidizer breaks the bonds of organic substances such as microorganisms and volatile organic molecules into small compounds, which eventually leave carbon dioxide and water.

In order to cause the photocatalytic reaction to take place in the photocatalytic filter, the photocatalytic filter coated with the photocatalyst on the surface should be in direct contact with the medium such as air, and the region where the photocatalytic reaction occurs is limited to the region irradiated with ultraviolet light.

Therefore, in order to induce more active photocatalytic reaction, it is necessary to increase the contact area between the surface of the photocatalyst-coated photocatalytic filter and the medium and the region irradiated with ultraviolet rays.

An object of the present invention is to provide a high-efficiency photocatalytic filter which is improved in structure to actively induce photocatalytic reaction and improve sterilization and deodorization effect.

The high-efficiency photocatalytic filter according to the present invention comprises: a housing in which a flow path for a fluid is formed; A screw rotating body rotatably installed in the flow path; A photocatalyst layer formed on a surface of the screw rotating body; And a light source module for irradiating light to the photocatalyst layer, wherein the light source module includes an LED disposed on the housing and irradiating light in a direction crossing a direction in which the fluid passes through the flow path.

The screw rotating body may include a rotary shaft portion formed to have a length extending in a direction in which the fluid passes through the passage, a rotary shaft disposed in the passage and rotated about a longitudinal axis; And a screw portion protruding outside the rotation shaft.

In addition, the screw portion may be formed to extend in a screw shape along the longitudinal direction of the rotation shaft.

Further, the light source module includes an LED for emitting ultraviolet light; It is preferable that the screw portion is formed of a material having high reflectance to ultraviolet rays.

Further, the screw portion is formed of an aluminum material; It is preferable that an oxide film layer is formed on the surface of the aluminum material.

It is also preferable that the oxide film layer is formed so as to be positioned between the screw portion and the photocatalyst layer.

Preferably, the oxide film layer is formed on the surface of the screw portion, wherein an anodic aluminum oxide thin film having micropores formed therein.

The light source module may further include a collimating lens for collimating the traveling path of the light emitted from the LED.

The present invention further includes a driving unit for generating a driving force for rotating the screw rotating body.

According to the high-efficiency photocatalytic filter of the present invention, the photocatalyst layer is formed on a screw rotating body having a screw-like protruding surface, thereby increasing the surface area of the photocatalyst in contact with the fluid to actively induce the photocatalytic reaction have.

In addition, the present invention has a structure in which a screw rotator having a photocatalyst layer formed on its surface is rotatably provided, so that a large amount of fluid can circulate around the photocatalyst layer smoothly, So that the photocatalytic reaction can be actively induced, thereby improving the sterilization and deodorizing effect.

1 is a perspective view showing a part of a high-efficiency photocatalytic filter according to an embodiment of the present invention.
2 is a perspective view illustrating a screw rotating body according to an embodiment of the present invention.
3 is a cross-sectional view illustrating an internal structure of a screw rotating body according to an embodiment of the present invention.
4 is a view showing another example of a light source module according to an embodiment of the present invention.
5 is a view showing an operation state of a high efficiency photocatalytic filter according to an embodiment of the present invention.
6 is a view showing a rotating state of the screw rotating body.
7 is a view showing a state of ultraviolet ray transmission in the photocatalyst layer.

Hereinafter, an embodiment of a high efficiency photocatalytic filter according to the present invention will be described with reference to the accompanying drawings. For convenience of explanation, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view showing a part of a high efficiency photocatalytic filter according to an embodiment of the present invention, and FIG. 2 is a perspective view illustrating a screw rotating body according to an embodiment of the present invention. FIG. 3 is a sectional view showing the internal structure of a screw rotating body according to an embodiment of the present invention, and FIG. 4 is a view showing another example of a light source module according to an embodiment of the present invention.

1 and 2, a high efficiency photocatalytic filter 100 according to an embodiment of the present invention includes a housing 110, a screw rotating body 120, a photocatalyst layer 130, and a light source module 140 .

The housing 110 forms an outer appearance of the high efficiency photocatalytic filter 100 according to the present embodiment and accommodates the screw rotating body 120, the photocatalyst layer 130, and the light source module 140 therein.

A flow path F through which fluid such as air flows is formed inside the housing 110 and a flow path F is communicated with the outside of the housing 110 at one end and the other end of the housing 110 An inlet 111 and an outlet 113, which are passages, are formed.

Preferably, the housing 110 may be formed in the form of a hollow tube, and may be made of a material that does not transmit ultraviolet rays.

The screw rotating body 120 is accommodated in the housing 110 and is rotatably provided in the flow path F. [

The screw rotating body 120 may include a rotating shaft portion 121 and a screw portion 123.

The rotary shaft portion 121 is formed to have a length extending in the direction in which the fluid passes through the flow path F, that is, the longitudinal direction of the housing 110. The rotary shaft portion 121 is disposed at the center portion of the flow path F and is rotated about the longitudinal axis.

The screw portion 123 is formed so as to protrude to the outside of the rotary shaft portion 121. In this embodiment, the screw part 123 is illustrated as being formed to extend in the form of a screw along the longitudinal direction of the rotary shaft part 121. [

The screw portion 123 may be rotated in conjunction with rotation of the rotary shaft portion 121. In the housing 110 in which the screw part 123 is installed, a flow path F is formed in a screw shape corresponding to the shape of the screw part 123 and connected to the inlet 111 and the outlet 113 do.

Referring to FIGS. 2 and 3, the screw portion 123 is formed of a material having a high reflectivity with respect to ultraviolet rays. In the present embodiment, it is exemplified that the screw portion 123 is formed of an aluminum material having high reflectivity with respect to ultraviolet rays.

As another example, the surface of the screw portion 123 may be provided with a life-like or concave-convex portion, thereby inducing air turbulence to improve reactivity.

The oxide film layer 125 is formed on the surface of the screw portion 123 formed of aluminum.

The oxide film layer 125 may be formed by oxidizing the surface of the aluminum forming the screw part 123 and between the surface of the screw part 123 and the photocatalyst layer 130 formed on the surface of the screw part 123. [ As shown in FIG.

That is, the oxide layer 125 may be formed by oxidizing the aluminum surface forming the screw portion 123 before the photocatalyst layer 130 is formed on the surface of the screw portion 123.

The oxide layer 125 may be formed on the surface of the screw portion 125 by an aluminum anodic oxide thin film having micropores formed therein.

The oxide layer 125 thus formed may have micropores having a diameter of about several tens to several hundreds of nanometers to increase the surface area of the screw portion 123.

When the photocatalyst layer 130 is formed on the surface of the screw part 123 having the increased surface area as described above, the reaction area of the photocatalyst layer 130 can be greatly enlarged, .

The photocatalyst layer 130 is formed by coating the surface of the screw rotating body 120, more specifically, the surface of the screw portion 123 with a photocatalyst that reacts with ultraviolet rays to cause a photoreaction.

In this embodiment, the photocatalyst layer 130 is illustrated as being formed in a form that a surface of the screw portion 123 is coated with a photocatalyst such as titanium dioxide (TiO ₂ ).

In the photocatalyst layer 130 thus formed, a reaction occurs in which the photocatalyst is activated by ultraviolet rays irradiated through an LED 141 or the like to be described later. Through the reaction, By decomposing the material into carbon and water, sterilization and deodorizing action for removing contaminants and odors around the photocatalyst layer 130 can be performed.

According to this embodiment, the photocatalyst layer 130 is formed in the form of a photocatalyst coated on the oxide layer 125 formed on the surface of the screw portion 123.

That is, the photocatalyst layer 130 may be formed by applying a mixture of the photocatalyst powder made in the form of powder with an adhesive material to the surface of the oxide film layer 125 formed of the microporous aluminum anodic oxide film.

Since the photocatalyst layer 130 is formed in such a manner that the photocatalyst powder is applied to the oxide layer 125 whose surface area is enlarged through the micropores existing in the aluminum anodic oxide thin film, And the photoreaction characteristics can be greatly improved.

It is also possible to apply the photocatalyst layer 130 very thinly using a vapor deposition method.

1 and 2, the light source module 140 is installed inside the housing 111 and irradiates the photocatalyst layer 130 with light.

According to the present embodiment, the light source module 140 includes an LED 141 for irradiating ultraviolet rays. The LED 141 is provided inside the housing 110 and emits ultraviolet rays in a direction crossing the direction in which the fluid passes through the flow path F. [

The fluid passes through the flow path F in the longitudinal direction of the flow path F extending in the longitudinal direction of the housing 110 and the LED 141 is installed on the inner side surface of the housing 110, It is possible to irradiate the ultraviolet ray in the radial direction.

As an example, the LED 141 may be provided to irradiate light toward the photocatalyst layer 130 formed on the surface of the screw rotating body 120, and irradiate ultraviolet rays having a peak wavelength within 340 to 380 nm.

Among ultraviolet rays having a peak wavelength within 340 to 380 nm, particularly ultraviolet rays having a peak wavelength at 365 nm, the catalytic action of the photocatalyst is promoted, which is effective in decomposing harmful substances, pollution, and odors.

In the present embodiment, it is exemplified that the LED 141 is configured to emit ultraviolet rays having a peak wavelength at 365 nm. By the action of the LED 141 thus provided, the deodorizing action in the photocatalyst layer 130 becomes active It will happen.

Meanwhile, as shown in FIG. 4, the light source module 140 may further include a collimating lens 143. The collimating lens 143 is disposed on the exit side of the LED 141 that emits the ultraviolet rays so that ultraviolet rays irradiated from the LED 141 can be straightly spread and spread over the entire area of the photocatalyst layer 130 .

FIG. 5 is a view showing an operation state of a high efficiency photocatalytic filter according to an embodiment of the present invention, FIG. 6 is a view showing a rotation state of a screw rotating body, and FIG. 7 is a diagram showing a state of ultraviolet ray penetration in a photocatalyst layer .

5, a screw rotating body 120 is rotatably disposed inside a hollow housing 110. A screw part 123 is rotatably mounted on a rotating shaft part 121 on the outer side of the screw rotating body 120, As shown in FIG.

A photocatalyst layer 130 is formed on the surface of the screw rotating body 120. The photocatalyst layer 130 is coated with a photocatalyst that reacts with ultraviolet rays to cause a photoreaction.

According to the present embodiment, since the surface of the screw rotating body 120 is formed to have the convex shape protruding in the form of a screw, the surface area to which the photocatalyst can be applied can be further expanded.

The photocatalyst layer 130 formed by coating the photocatalyst on the screw rotating body 120 formed to have the extended surface area can be formed so that the area that can be reacted on the surface thereof is greatly enlarged, Can be improved.

The ultraviolet rays are directed toward the photocatalyst layer 130 by using the light source module 140 while passing a fluid such as air through the inside of the housing 110 in which the flow path F is formed. The reaction of activating the photocatalyst is generated and the substance causing pollution and odor in the vicinity of the photocatalyst layer 130 is decomposed into carbon and water through the reaction to sterilize and deodorize pollutants and odors around the photocatalyst layer 130 Action occurs.

In this process, when the screw rotating body 120 is rotated, ultraviolet rays irradiated from the light source module 140 can be uniformly irradiated to the photocatalyst layer 130 formed in a screw shape, It is possible to evenly take place in the entire region of the wafer 130.

The surface area of the photocatalyst layer 130 can be maximized by coating the photocatalyst layer 130 with a uniform thickness on the oxide layer 125 and by coating the oxide layer 125 with a very thin shape.

6, when the screw rotating body 120 is not rotated as the screw rotating body 120 rotates, the ultraviolet rays can reach the region where the ultraviolet ray can not reach evenly. Therefore, The photocatalytic reaction of the photocatalyst can be uniformly performed in the entire region of the photocatalyst layer 130 by the rotation of the entire body 120.

In addition, since the screw rotating body 120 rotated as described above allows the fluid to flow into the periphery of the photocatalytic layer 130 without interfering with the flow of the fluid, a large amount of fluid is circulated around the photocatalytic layer 130 So that the photocatalytic reaction can be performed more actively in the photocatalyst layer 130.

The rotation of the screw rotating body 120 may be performed by a flow of fluid passing through the flow path F or may be performed by a driving unit such as a driving motor for generating a driving force for rotating the screw rotating body 120 ).

On the other hand, ultraviolet rays irradiated from the light source module 140 toward the photocatalyst layer 130 penetrate the photocatalyst layer 130 as shown in FIG. 6 and FIG. 7 to induce a photocatalytic reaction of the photocatalyst.

Ultraviolet rays penetrating the photocatalyst layer 130 induce a photocatalytic reaction of the photocatalyst in the penetration process and reach the oxide film layer 125 formed on the surface of the screw 123 formed of a material having high ultraviolet reflectivity And is reflected therefrom, passes through the photocatalyst layer 130 again, and induces a photocatalytic reaction.

That is, in the photocatalyst layer 130, a photoreaction is induced once by the ultraviolet light penetrating the photocatalyst layer 130, and the photocatalytic layer 130 passes through the photocatalyst layer 130 and passes through the screw part 123 and the oxide film layer 125 formed on the surface thereof A phenomenon occurs in which the photoreaction is induced again by the reflected ultraviolet ray. As a result, the photoreaction induction efficiency of about twice as much as the conventional one can be obtained.

The thickness of the photocatalyst layer 130 is preferably determined such that the ultraviolet light emitted from the light source module 140 penetrates the photocatalyst layer 130 and is reflected to reach the surface of the photocatalyst layer 130 .

Considering that the penetrable depth of ultraviolet rays to the photocatalyst is inversely proportional to the wavelength of the ultraviolet ray, the thickness of the photocatalyst layer 130 is set to be thicker as the wavelength of the ultraviolet ray is short considering the wavelength of the ultraviolet ray irradiated from the light source module 140 And can be appropriately adjusted in such a manner that the longer the wavelength of the ultraviolet ray is, the thinner it is.

The high efficiency photocatalytic filter 100 of the present embodiment as described above has a structure in which the photocatalyst layer 130 is formed in the screw rotating body 120 having a surface protruding in the form of a screw, It is possible to more actively induce the photocatalytic reaction.

The high efficiency photocatalytic filter 100 of the present embodiment has a structure in which the screw rotating body 120 having the photocatalytic layer 130 formed on the surface thereof is rotatable so that a large amount of fluid around the photocatalytic layer 130 The ultraviolet rays emitted from the light source module 140 are uniformly irradiated over the entire area of the photocatalyst layer 130 and the photocatalytic reaction is actively induced thereby to improve the sterilization and deodorization effect .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

100: High efficiency photocatalytic filter
110: Housing
120: screw rotating body
121:
123: screw portion
125: oxide layer
130: photocatalyst layer
140: Light source module
141: LED
143: Aiming lens

Claims

A housing in which a fluid passage is formed;
A screw rotating body rotatably provided in the flow path;
A photocatalyst layer formed on a surface of the screw rotating body; And
And a light source module for irradiating light to the photocatalyst layer,
Wherein the light source module includes an LED disposed on the housing and adapted to irradiate light in a direction crossing a direction in which the fluid passes through the flow path.

2. The screw rotating body according to claim 1,
A rotation axis part formed in the flow path and formed to have a length extending in a direction in which the fluid passes through the flow path, the rotation axis part being rotated about a longitudinal axis; And
And a screw part protruding outward from the rotating shaft.

3. The method of claim 2,
Wherein the screw portion is formed to extend in a screw shape along a longitudinal direction of the rotary shaft.

The method according to claim 1,
Wherein the light source module includes an LED for emitting ultraviolet light;
Wherein the screw part is formed of a material having a high reflectivity to ultraviolet rays.

5. The method of claim 4,
Wherein the screw portion is formed of an aluminum material;
Wherein an oxide film layer is formed on the surface of the aluminum material.

6. The method of claim 5,
Wherein the oxide film layer is formed to be positioned between the screw portion and the photocatalyst layer.

The method according to claim 6,
Wherein the oxide film layer is formed on the surface of the screw portion, and an aluminum anodic oxide thin film having micropores formed therein is formed on the surface of the screw portion.

The method according to claim 1,
Wherein the light source module further comprises a collimating lens for collimating the traveling path of the light emitted from the LED.

The method according to claim 1,
Further comprising a driving unit for generating a driving force for rotating the screw rotating body.