KR20200098950A - Air purifying system using photocatalytic filter - Google Patents

Abstract

According to the present invention, a photocatalytic air purifying system comprises: a container having a lower end partitioned by a mesh panel, and formed with a fan at an upper end so as to have an air purifying space; an ultraviolet lamp seated on an upper portion of the mesh panel so as to be placed erected in the center of the air purifying space; and a plurality of photocatalytic filters for surrounding the ultraviolet lamp, and filling in the air purifying space. The photocatalytic filter includes: a hollow substrate including at least a pair of air flow holes formed at both points of the sidewalls opposite horizontally to each other with respect to the center as a glass pipe with opened both ends; and a photocatalyst applied on the inner and outer surfaces of the hollow substrate. Therefore, the photocatalytic air purifying system of the present invention maximizes the photocatalyst activation efficiency in a limited space in a container, and forms air flow to be smooth, thereby being efficiently applied to an exhaust pipe with high pollution level.

Description

Photocatalytic air purification system {Air purifying system using photocatalytic filter}

The present invention relates to a photocatalytic air purification system that maximizes photocatalytic activation efficiency and air flow efficiency to enable high-capacity, high-efficiency air purification.

In general, a photocatalyst is a material that causes a catalytic action by receiving light energy, and when energy in a certain region is applied to the photocatalyst, electrons are excited from the valence band to a conduction band, where electrons are formed in the conduction band. Holes are formed in household appliances. The electrons thus formed react with oxygen on the surface of the photocatalyst to create a superoxide anion (O2-), and the holes react with moisture existing in the air to create a hydroxy radical (OH-). Since the hydroxy radicals generated at this time have a very good ability to oxidatively decompose powerful organic substances, they decompose odor substances, viruses, and bacteria such as bacteria, which are always present in the air, and turn them into water and carbon dioxide. The photocatalytic reaction was discovered in 1967 by Akira Fujishima, a graduate student at the University of Tokyo at the time, and recently it is mainly used in environmental purification devices such as air purification, sterilization, odor removal, and water purification devices to remove pollutants.

In general, a photocatalyst is applied in a manner that is coated on the surface of a structure installed in a photocatalyst purifier, and a material substrate coated with a photocatalyst is generally referred to as a photocatalytic filter. The photocatalyst filter is usually installed near an ultraviolet lamp to receive ultraviolet rays to activate the photocatalyst. At this time, as air passes, contaminants in the air come into contact with the photocatalyst to decompose, thereby purifying.

As the material of the substrate coated with the photocatalyst, organic materials are not well used, and inorganic materials such as metal, glass, ceramic, etc., which do not decompose by the photocatalyst, are mainly used. Among them, transparent materials are preferred because they transmit ultraviolet rays well without shadows, and representative transparent materials include glass, quartz, and acrylic. Quartz is transparent and has the advantage of being able to use ultraviolet rays more efficiently because quartz itself has an ultraviolet transmittance higher than that of glass, but it has a problem that it is more difficult to process than glass, and transparent plastics are decomposed by photocatalysts to prevent decomposition of photocatalysts. There is a hassle of using a material such as nano silica that can be used after coating it with an intermediate layer.

As a prior art related to the present invention, a'air purifier using a photocatalyst' of Korean Utility Model No. 20-0480260 is disclosed.

The air purifier of the prior art contains a photocatalytic laminate of titanium oxide (TiO2) on all sides of the inner surface of the air purifier, and a photocatalyst in a network form is stacked in a region of the air circulation in the gas. The fan was installed so as to be rotatable at a low speed, and a plurality of ultraviolet lamps for photocatalytic reaction were arranged in all directions in the interior space of the gas.

In addition, in the case of Korean Patent Registration No. 10-0997378'photocatalytic device using a porous pipe and air purification device using the same', a number of holes are perforated and a porous pipe capable of accommodating an ultraviolet lamp therein, and a photocatalyst coated It is formed of glass fibers and includes a photocatalyst bag surrounding the porous pipe.

In the case of the above-described prior art, the photocatalyst laminate is made of a single metal plate that cannot transmit ultraviolet rays, and the porous pipe is also an opaque material to reduce overall transmittance. In other words, the above-described devices are limited in photocatalytic activity and air flow due to limitations in shape and material, so that large-capacity purification that can be applied to exhaust pipes such as internal combustion engines, factories and buildings is impossible and the efficiency is low. There is a problem.

Korean Utility Model No. 20-0480260'Air purifier using photocatalyst' Korean Patent Registration No. 10-0997378'Photocatalyst device using porous pipe and air purification device using the same'

The main object of the present invention is to provide a photocatalytic air purification system that maximizes the photocatalyst activation efficiency in a limited space in a container and forms a smooth air flow so that it can be efficiently applied to an exhaust pipe with high pollution.

In order to achieve the above object, the photocatalytic air purification system according to the present invention includes: a container having a lower portion divided by a mesh panel and a fan formed at the upper portion to have an air purification space therein; An ultraviolet lamp mounted on the top of the mesh panel so as to stand upright in the center of the air purification space; And a plurality of photocatalytic filters surrounding the ultraviolet lamp and filled in the air purification space.

At this time, the photocatalyst filter includes a hollow substrate having at least a pair of air flow holes formed at both points of the sidewalls horizontally opposite to the center as a transparent tube with both ends open, and a photocatalyst coated on the inner and outer surfaces of the hollow substrate. It characterized in that it comprises a.

In addition, the photocatalytic filter is characterized in that it further includes one or more raised portions in which one side of the outer surface of the side wall is raised, and minimizes contact areas between each other when accommodated in the air purification space.

In addition, the raised portion is an O-ring fitted to the sidewall of the photocatalytic filter so as to pass through the air flow hole, and the O-ring is formed of a transparent elastic material coated with a photocatalytic decomposition inhibitor on the outer surface.

Additionally, the fan is characterized in that the diffuse reflection coating is applied to the surface of the wing at the side of the air purification space.

Finally, a plate-shaped mesh material having a lamp support hole through which the ultraviolet lamp penetrates in the center, and a support structure having a circumference fixed to the wall surface of the container to partition the air purification space up and down; characterized in that it further comprises do.

In the photocatalytic air purification system according to the present invention, the ultraviolet rays emitted from the ultraviolet lamp come into contact with the entire number of photocatalytic filters that are randomly stacked and accommodated due to the characteristics of being colorless and transparent as a whole. There is an effect that large-capacity purification is possible due to the maximum surface area.

In addition, as air flow paths in the air purification space are more diverse, air flow becomes smooth, air purification efficiency increases, and a load that may be applied to the fan is prevented.

1 is a cross-sectional view showing the basic configuration of a photocatalytic air purification system according to the present invention.
Figure 2a is a perspective view showing a photocatalytic filter according to the present invention.
Figure 2b is a cross-sectional view showing a photocatalytic filter according to the present invention.
Figure 3 is a perspective view showing an embodiment of a raised portion according to the present invention.
Figure 4a is a perspective view showing a support structure of the present invention.
Figure 4b is a cross-sectional view showing an embodiment to which the support structure of the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in each drawing refer to the same components.

1 is a cross-sectional view showing the overall configuration of a photocatalytic air purification system according to the present invention.

Referring to FIG. 1, the photocatalytic air purification system of the present invention basically includes a container 10, an ultraviolet lamp 20, and a photocatalytic filter 30. In order to help understand the configuration of the invention, FIG. 1 is a cross-sectional view or a perspective view of a photocatalytic filter 30 filled in the container 10.

Each configuration will be described in turn, the container 10 is formed so as to have an air purification space (10a) therein by partitioning the bottom of the mesh panel 11 and the fan 12 formed at the top. In other words, the container 10 is provided in a tubular shape with both ends open, so that the contaminated air introduced into the lower part passes through the air purification space 10a provided in the container 10 and is purified and discharged to the upper part. It is a provided housing. The container 10 may be manufactured and applied in a shape such as a cylindrical shape or a square pipe as necessary, and an exhaust pipe such as an internal combustion engine, a building, or a factory may function as the container 10, and a separately provided cylindrical container It is also possible to implement so that (10) is fitted inside the exhaust pipe. That is, the container 10 may be applied in any form as long as it has a shape having one end through which contaminated air can be introduced and the other end through which the purified air can be discharged.

In this case, a plurality of photocatalytic filters 30, which will be described later, are accommodated in the air purification space 10a. In order to physically partition the air purification space 10a to stably accommodate the photocatalytic filter 30 , A mesh panel 11 having the same shape as the cross section of the container 10 is disposed at the lower end of the container 10 to function as a bottom surface of the air purification space 10a, and the fan 12 is It is provided on the upper end of the container 10 to partition the space as the upper surface of the air purification space 10a and at the same time assist in smooth air flow by rotational driving.

The inner wall of the container 10 is made of inorganic materials such as metals, glass, ceramics, etc. that are not decomposed by a photocatalyst, or provided with a photocatalytic decomposition inhibitor coated on the surface of an organic material, such as nano silica, etc. It is desirable to ensure durability even in use.

In addition, the fan 12 may be subjected to a diffuse reflection coating treatment on the surface of the wing at the side of the air purification space 10a in order to further aid in radiation of ultraviolet rays emitted from the ultraviolet lamp 20 disposed below.

The ultraviolet lamp 20 is a light source that generates ultraviolet rays necessary for photocatalytic activation, and is mounted on the top of the mesh panel 11 so as to be erected in the center of the air purification space 10a to provide the air purification space 10a. It emits ultraviolet rays in all directions.

2A is a perspective view showing a photocatalytic filter according to the present invention, and FIG. 2B is a cross-sectional view illustrating a photocatalytic filter according to the present invention.

2A and 2B, the photocatalytic filter 30 is a cylindrical structure formed to be completely colorless and transparent so that ultraviolet rays emitted from the ultraviolet lamp 20 can be freely transmitted, and surround the ultraviolet lamp 20. And the air purification space 10a is filled with disorderly.

In more detail, the photocatalytic filter 30 is composed of a hollow substrate 31 which is a transparent tube with both ends open, and a photocatalyst 32 coated on the inner and outer surfaces of the hollow substrate 31. The material of the hollow substrate 31 is preferably implemented as a glass material in consideration of economical efficiency and processability, and titanium dioxide is preferably applied as the photocatalyst 32. The titanium dioxide is originally white, but becomes colorless and transparent particles when it becomes nanoparticles of 100 nm or less.By coating the nano titanium dioxide photocatalyst 32 on a hollow substrate made of a transparent glass material, a colorless and transparent photocatalyst filter 30 is formed. , The photocatalytic filter 30 has a property of transmitting ultraviolet rays to the entire portion.

That is, due to the characteristic of being colorless and transparent as a whole, the ultraviolet rays emitted from the ultraviolet lamp 20 reach the entire number of photocatalytic filters 30 that are randomly stacked and accommodated. ) Surface area is maximized, enabling large-capacity purification.

On the other hand, in order to further smooth the flow of contaminated air through the air purification space 10a by driving the fan 12, the hollow substrate 31 is formed at both points of the sidewalls opposite horizontally with respect to the center. It may be provided with more than one pair of air flow holes (31a). At this time, the air flow hole 31a is preferably formed at an intermediate height for the overall durability of the hollow substrate 31, and a virtual line connecting the center points of the opposite air flow holes 31a is the hollow substrate ( 31) By being formed to pass through the center of the circle, which is a cross section, the air flow passing through the hollow substrate 31 is guaranteed both vertical flow through the upper and lower ends and horizontal flow through both air flow holes 31a based on FIGS. 2A and 2B. It is most desirable to do so. Two pairs of the air flow holes 31a, that is, a total of four or more, may be provided as necessary.

That is, when the flow of contaminated air through the air purification space 10a is not smooth, there is a problem that a load is generated on the fan 12 and the fan 12 is damaged or stopped, but the air flow hole 31a ) Is provided, the air flow path can be secured in more various ways to improve the flow, and accordingly, the air flow amount is increased, thereby improving the air purification efficiency.

3 is a perspective view showing an embodiment of a raised portion according to the present invention.

Referring to FIG. 3, the photocatalytic filter 30 minimizes the contact area between each other when a plurality of air purification spaces 10a are accommodated, so that the air flow path can be more stably secured. (31b) may additionally be included.

The raised part 31b is formed so that one side of the outer side of the sidewall of the hollow substrate 31 protrudes outward from the other part, and the shape of the hollow substrate 31 is changed to the raised part 31b when processing a glass material. It may be provided in a shape including, and may be provided in a manner of attaching or combining separate components. At this time, when the raised portion 31b is stacked in the air purification space 10a or when the photocatalyst filter 30 is manufactured and delivered to the box, it is a kind of protection from impacts caused by contact and loads caused by stacking. In order to additionally provide a buffering effect, it may be desirable to be implemented in a manner of combining a separate component made of an elastic material.

As an example of this, the raised portion 31b may be implemented as a plurality of adsorption plates attached to the outer surface by air compression, or may be applied in an O-ring shape as shown in FIG. 3.

In particular, when the raised portion 31b is provided as an O-ring, the O-ring passes through the air flow hole 31a and is disposed so as to be fitted to the sidewall of the photocatalytic filter 30, so that the air flow of the photocatalytic filter 30 The hole 31a can be prevented from being blocked by the sidewall of the other photocatalytic filter 30 and restricting the air flow. In this case, it is preferable that the O-ring is formed of a transparent elastic material coated with a photocatalytic decomposition inhibitor on the outer surface, so as to ensure UV transmission and not to be decomposed by the photocatalyst.

Figure 4a is a perspective view showing a support structure of the present invention, Figure 4b is a cross-sectional view showing an embodiment to which the support structure of the present invention is applied.

Referring to FIG. 4, a support structure 40 may be additionally provided inside the container 10. The support structure 40 is provided to increase the durability of the device by efficiently distributing the load of the photocatalytic filter 30 by dividing the air purification space 10a up and down, and the ultraviolet lamp 20 penetrates the center. The lamp support hole 40a is formed in a plate shape made of a mesh material, and the circumference is fixed to the inner wall of the container 10 and supported.

When the photocatalytic air purification system of the present invention is arranged vertically as shown in FIGS. 1 and 4, the support structure 40 efficiently distributes the load of the photocatalytic filters 30 as described above, and the photocatalyst filter located below There is an effect of reducing the load received by the 30, and when the container 10 is horizontally disposed and used as necessary, ultraviolet rays disposed long along the center of the container 10 by the lamp support hole 40a The lamp 20 can be stably supported and mounted.

In addition, in order to further facilitate air flow and to strengthen the support of the ultraviolet lamp 20, the support structure 40 may be formed as a three-dimensional structure having two plates as shown in FIG. 4. Do. To this end, the support structure 40 is a plate made of a mesh material provided with a lamp support hole 40a, and the first and second plates 41 and 42 disposed vertically apart from each other, and the first and second plates 41 and 42 It may include one or more supports 43 connecting one side of the circumference. As the two plates are structurally connected as described above, the ultraviolet lamp 20 may be supported more stably. In addition, when the photocatalytic filter 30 is not accommodated in the spaced space between the first and second plates 41 and 42, contaminated air is accommodated and flowed between the upper and lower spaces filled with the photocatalytic filter 30. A more stable air flow can be achieved by providing an empty space that can be used.

As described so far, the configuration and operation of the photocatalytic air purification system according to the present invention are expressed in the above description and drawings, but these are only described as examples, and the spirit of the present invention is not limited to the above description and drawings. Of course, various changes and changes are possible within the scope of not departing from the technical idea of

10: Courage
10a: air purification space
11: mesh panel
12: fan
20: UV lamp
30: photocatalytic filter
31: hollow substrate
31a: air flow hole
31b: ridge
32: photocatalyst
40: support structure
40a: lamp support hole
41: first edition
42: second edition
43: support

Claims (6)

A container having a lower portion divided by a mesh panel and a fan formed at the upper portion to have an air purification space therein;
An ultraviolet lamp mounted on the top of the mesh panel so as to stand upright in the center of the air purification space;
A photocatalytic air purification system comprising a; a plurality of photocatalytic filters surrounding the ultraviolet lamp and filled in the air purification space.
The method of claim 1,
The photocatalytic filter,
Characterized in that it comprises a hollow substrate having at least a pair of air flow holes formed at both points of sidewalls opposite horizontally with respect to the center as a transparent tube with both ends open, and a photocatalyst coated on the inner and outer surfaces of the hollow substrate. , Photocatalytic air purification system.
The method of claim 2,
The photocatalytic filter,
Including one or more ridges on which one side of the outer surface of the side wall is raised,
A photocatalytic air purification system, characterized in that the contact area between each other is minimized when accommodated in the air purification space.
The method of claim 3,
The ridge,
An O-ring fitted to the sidewall of the photocatalytic filter so as to pass through the air flow hole,
The O-ring is a photocatalytic air purification system, characterized in that formed of a transparent elastic material coated with a photocatalytic decomposition inhibitor on the outer surface.
The method of claim 1,
The fan,
A photocatalytic air purification system, characterized in that a diffuse reflection coating is applied to the surface of the wing on the side of the air purification space.
The method of claim 1,
A plate shape made of a mesh material having a lamp support hole through which the ultraviolet lamp passes in the center, and a support structure having a circumference fixed to the wall surface of the container to divide the air purification space up and down; a photocatalyst characterized in that it further comprises Air purification system.

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