KR102292792B1 - Compound filter for air cleaner - Google Patents

Abstract

The present invention relates to a filter for an air purifier.
An air purifier filter according to an embodiment of the present invention is a filter inserted into an air purifier to purify contaminated air, comprising: an upper housing having an open upper portion at least one side; a UV irradiator coupled to the lower portion of the upper housing and provided with a plurality of UV LEDs to irradiate UV to the lower housing; a disk-shaped photocatalyst module located under the UV irradiation unit, provided with a plurality of photocatalyst beads containing a photocatalyst responding to UV, and having at least one through hole formed in the vertical direction; a disk-shaped zeolite module located under the photocatalyst module, provided with a plurality of zeolite beads for adsorbing harmful substances from polluted air introduced through the lower housing, and having at least one through-hole formed in the vertical direction; and a lower housing positioned under the zeolite module and having at least one lower side open, between the UV irradiation unit and the photocatalyst module, between the photocatalyst module and the zeolite module, and between the zeolite module and the lower housing, each disc-shaped porosity It is characterized in that the mesh is provided.

Description

Filter for air cleaner {Compound filter for air cleaner}

The present invention relates to a filter for an air purifier, and more particularly, air in which polluted air in the room is introduced, adsorbed and decomposed, and purified air is discharged, but air purification efficiency is improved by increasing the amount of polluted air flow through a through hole It relates to a filter for a purifier.

As rapid industrialization progresses along with economic development, global atmospheric warming and environmental pollution are rapidly increasing. In particular, due to fine dust and various pollutants, indoor as well as outdoor air quality is very bad, and even if you open a window to allow outdoor air to flow in, there is a problem that the adverse effect may occur on days when the fine dust is severe.

In addition, various pollutants such as carbon dioxide generated by the breathing of the driver and passenger, hydrocarbons, carbon monoxide, sulfur dioxide and nitrogen oxide generated by vehicle interior materials and driving elements, including fine dust and polluted air from outside the vehicle, are present inside the vehicle. There is a study showing that air pollution inside a vehicle can increase up to 15 times when the vehicle is stopped while waiting for a signal or due to a traffic jam.

It is true that when the air quality inside a vehicle is degraded as much as the damage suffered by pedestrians due to air pollution caused by diesel vehicles, the damage to passengers including the driver due to the polluted air in a closed space is very large.

Since polluted air is a cause of various health diseases such as asthma, chronic obstructive pulmonary disease, heart disease or stroke, removing air pollution from vehicles and interiors is becoming a very important social issue.

In order to solve this problem, various air purifiers that can be used indoors have been developed, and as an example of such prior art, there is a "filter assembly for an air purifier" of Korean Patent Registration No. 10-2039273.

The prior art relates to a filter assembly for an air purifier that is easy to replace and maximizes the inflow and discharge of air by a fan for air cleaning. A driving unit including a support portion having a plurality of through holes, a motor mounted on one surface of the support portion to provide a rotational force for introducing air in a direction of the through hole, and a fan for generating an air flow with the rotational force of the motor; , a filter part for removing impurities in the air that has passed through the through hole by being in close contact with the other surface of the support part, and the other surface to which the filter of the support part is in close contact with the plurality of through holes for supporting and fixing the filter It includes a support wall provided to extend at a predetermined height in the vertical direction to the other surface to surround the region, and the filter part is configured to be supported by being inserted into the support wall of the support part by force fitting.

The prior art has the advantage that the air pressure by the fan is improved, so that the air cleaning performance is improved even when the same rotational force is used, and the filter is configured to be very easy to replace.

However, in the prior art, since all the polluted air is configured to move only through the filter, when it is composed of two or more layers to improve the function of the filter, the air moves only through all the layers, so a stronger fan is used for quick air purification The only drawback is that airflow can only be improved.

Republic of Korea Patent No. 10-2039273 (registered on October 25, 2019)

The present invention is to solve this conventional problem, and the present invention is an air purifier that introduces polluted air in the room, adsorbs and decomposes it, and discharges purified air, but increases the amount of polluted air flow through a through hole to improve air purification efficiency. The purpose is to provide a filter for

An air purifier filter according to an embodiment of the present invention for achieving this object is a filter inserted into an air purifier to purify contaminated air, comprising: an upper housing having an open upper portion at least one side; a UV irradiator coupled to the lower portion of the upper housing and provided with a plurality of UV LEDs to irradiate UV to the lower housing; a disk-shaped photocatalyst module positioned under the UV irradiation unit, provided with a plurality of photocatalyst beads containing a photocatalyst that responds to UV, and having at least one through-hole formed in the vertical direction; a disk-shaped zeolite module located under the photocatalyst module, provided with a plurality of zeolite beads for adsorbing harmful substances from the contaminated air introduced through the lower housing, and having at least one through-hole formed in the vertical direction; and a lower housing positioned under the zeolite module and having at least one lower side open, between the UV irradiation unit and the photocatalyst module, between the photocatalyst module and the zeolite module, and between the zeolite module and the lower housing, each disc-shaped porosity It is characterized in that the mesh is provided.

The photocatalyst module according to another embodiment has a hollow disk shape and is composed of a radial frame provided at least two in a radial direction from a central axis and an annular frame formed in a circumferential direction, and two or more symmetrically by the radial frame and the annular frame A first space portion and a second space portion formed vertically through a slit shape inside each of the two or more radial frames, wherein the zeolite module has a hollow disk shape and is provided with two or more radial frames in the radial direction from the central axis and in the circumferential direction It consists of an annular frame formed as a , and includes a third space formed symmetrically by two or more by the radial frame and the annular frame and a fourth space formed vertically through a slit shape inside the two or more radial frames, the first space It is characterized in that a plurality of photocatalytic beads are densely arranged in the portion and a plurality of zeolite beads are densely arranged in the third space portion.

In the present invention according to another embodiment, the sum of the surface areas of each of the second spaces is equal to the sum of the surface areas of the respective fourth spaces, and the sum of the surface areas of each of the second spaces is equal to the sum of the surface areas of each of the first spaces. It is characterized in that 3 to 30 percent of the sum of the surface areas of the spaces and the sum of the surface areas of each of the second spaces.

In the present invention according to another embodiment, the third space portion is formed to have the same size as the first space portion, and the fourth space portion is formed to have the same size as the second space portion, and the second space portion and The fourth space portion is characterized in that it is disposed at the same position in the vertical direction.

In the present invention according to another embodiment, the photocatalyst module and the zeolite module each include a fifth space portion and a sixth space portion formed vertically penetrating around a central axis.

In the present invention according to another embodiment, at least one of the photocatalyst module and the zeolite module is configured to be rotatable about a central axis.

In the present invention according to another embodiment, the photocatalytic beads are characterized in that they are formed by coating the titanium dioxide nanopowder adhered to the silicon oxide beads with an inorganic binder.

The present invention has the advantage of increasing the amount of pollutant air flow through the through-hole to efficiently purify the air indoors.

In addition, the present invention has an advantage in that the amount of pollutant airflow can be adjusted so that the air can be properly purified according to the situation.

1 is a perspective view of a filter for an air purifier according to an embodiment of the present invention.
2 is a perspective view from another direction showing an air flow of a filter for an air purifier according to an embodiment of the present invention.
3 is an exploded perspective view of a filter for an air purifier according to an embodiment of the present invention.
4 is a schematic diagram showing UV irradiation in the UV irradiation unit according to an embodiment of the present invention.
5 is a plan view of a photocatalyst module and a zeolite module according to an embodiment of the present invention.
6 is a cross-sectional view of a filter for an air purifier according to an embodiment of the present invention.
7 is a plan view of a photocatalyst module and a zeolite module according to another embodiment of the present invention.
8 is a perspective view of a photocatalyst module and a zeolite module according to another embodiment of the present invention.
9 and 10 are cross-sectional views of a filter for an air purifier according to another embodiment of the present invention.
11 is a graph of acetic acid removal result calculated by adjusting the density of beads of the filter for an air purifier according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the present invention, in the case of obscuring or obscuring the technical idea of the present invention due to the detailed description of the known configuration, the description of the known configuration will be omitted.

1 is a perspective view of a filter for an air purifier according to an embodiment of the present invention, FIG. 2 is a perspective view from another direction showing an air flow of the filter for an air purifier according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention 4 is an exploded perspective view of a filter for an air purifier according to an embodiment, and FIG. 4 is a schematic diagram showing UV irradiation in a UV irradiation unit according to an embodiment of the present invention.

The filter 100 for an air purifier according to an embodiment of the present invention is a filter that is inserted into the air purifier to purify contaminated air. The lower housing 180 and the upper housing 110 and the lower housing 180 are inserted into the interior and is made to include two or more modules to purify the indoor polluted air in each method.

For example, the filter 100 for an air purifier according to this embodiment is coupled to the lower portion of the upper housing 110 and includes a plurality of UV LEDs 122 to irradiate UV to the lower housing 180 side (direction). A disk-shaped photocatalyst provided with the configured UV irradiator 120 and a plurality of photocatalyst beads (not shown) located under the UV irradiator 120 and containing a photocatalyst that responds to UV irradiated from the UV irradiator 120 . A disk-shaped zeolite provided with a module 140 and a plurality of zeolite beads (not shown) positioned under the photocatalyst module 140 and adsorbing harmful substances from the contaminated air introduced through the lower housing 180 . module 160 . At this time, the lower housing 180 is positioned under the zeolite module 160 .

For example, at least one through hole is formed in the photocatalyst module 140 and the zeolite module 160 in the vertical direction.

When the air introduced through the lower housing 180 is purified while moving toward the upper side, the through-hole increases the total amount of moving air to promote air circulation, thereby enabling rapid air purification. That is, when the contaminated air passes through the photocatalyst module 140 and the zeolite module 160, the passing speed is greatly reduced due to friction and collision between the photocatalyst beads and the zeolite beads, respectively, so that the circulation of the entire air is slow. By allowing a portion of the air to move rapidly through the through hole, the circulation rate of the total air can be increased, and the throughput of the pollutant airflow is increased.

The photocatalyst module 140 and the zeolite module 160 may be configured to be replaceable in the form of a cartridge.

A detailed description of the through hole will be described later.

For example, the photocatalytic beads are formed by coating titanium dioxide nanopowders adhered to silicon oxide beads with an inorganic binder.

When the titanium dioxide (TiO2) is irradiated with UV (ultraviolet rays), an oxidation reaction is made to oxidize and decompose organic compounds contained in the contaminated air, while antibacterial and deodorizing are achieved.

In other words, when UV is irradiated to titanium dioxide, a photocatalytic reaction takes place, and the reactive material formed through this photocatalytic reaction destroys various bacteria or organic pollutants such as cigarette smoke, viruses, bacteria and VOCs, so that they are discharged as water vapor and carbon dioxide. will be. For example, the reactive material may be understood as a hydroxy radical having a very large oxidizing power formed by the reaction of a hole from which electrons are released on the surface of the UV irradiation surface of the photocatalyst with a water molecule.

The titanium dioxide is an example of a photocatalytic material, and compared to other photocatalytic materials such as ZnO, CdS, ZrO2, V2O3, etc., there is an advantage that it can be used semi-permanently because it is not deformed even during UV irradiation.

For example, the zeolite beads are made of a known zeolite (Zeolite, zeolite), mainly composed of an aqueous aluminum silicate mineral containing an alkali metal or alkaline earth metal. The zeolite has a molecular sieve function and at the same time can adsorb a large amount of water through a large gap formed by breaking the rules of the network structure, and has a property of selectively and strongly adsorbing unsaturated hydrocarbons or polar substances by the action of cations in the crystal structure. will have Through this, it is used as a carbon dioxide adsorption, removal of harmful substances, antibacterial properties, maintenance of food quality and freshness.

The zeolite beads according to this embodiment are formed by processing such zeolite into a bead shape, and when polluted air collides or comes into contact with a plurality of zeolite beads disposed in the zeolite module, harmful substances and carbon dioxide are adsorbed from the polluted air be able to do

The filter 100 for an air purifier according to an embodiment of the present invention is between the UV irradiation unit 120 and the photocatalyst module 140, between the photocatalyst module 140 and the zeolite module 160, and the zeolite module 160. A disk-shaped porous mesh 130 , 150 , 170 may be provided between and the lower housing 180 , respectively.

The porous mesh (130, 150, 170) prevents the photocatalyst beads of the photocatalyst module 140 and the zeolite beads of the zeolite module 160 from escaping to the outside, while passing through the lower housing 180. Contaminated air is rapidly discharged from the zeolite module 160 through the photocatalyst module 180 and through the upper housing 110 . For this purpose, the mesh eye size of the porous mesh 130, 150, 170 is preferably formed to be smaller than that of the photocatalyst beads or zeolite beads, and porous having different mesh eye sizes depending on the size of the photocatalyst beads and zeolite beads A mesh may be provided at each location.

5 is a plan view of a photocatalyst module and a zeolite module according to an embodiment of the present invention, FIG. 6 is a cross-sectional view of an air purifier filter according to an embodiment of the present invention as viewed from A-A' in FIG. 5, and FIG. 11 is this view It is a graph of the result of acetic acid removal calculated by adjusting the density of beads of the filter for an air purifier according to an embodiment of the present invention.

The photocatalyst module 140 according to an embodiment of the present invention, as shown in FIG. 5, has a hollow disk shape and is provided with two or more radial frames 141 in the radial direction from the central axis and an annular shape formed in the circumferential direction. It consists of a frame (143).

The photocatalyst module 140 includes a first space portion 142 symmetrically formed by two or more radial frames 141 and annular frames 143 and up and down in a slit shape inside two or more radial frames 141, respectively. and a second space portion 144 formed therethrough.

In FIG. 5, the radial frame 141, the first space portion 142, and the second space portion 144 according to the present embodiment are configured to be formed by three each, but the present invention is not limited thereto. It may be configured to be formed.

The zeolite module 160 according to an embodiment of the present invention has a hollow disk shape and consists of a radial frame 161 provided with two or more in the radial direction from the central axis and an annular frame 163 formed in the circumferential direction (to be described later). 7 to 8 to which).

The zeolite module 160 includes a third space 162 symmetrically formed by two or more radial frame 161 and annular frame 163 and a slit shape inside two or more radial frames 161, respectively. and a fourth space portion 164 formed therethrough.

The radial frame 161, the third space portion 162, and the fourth space portion 164 according to the present embodiment are configured to be formed by three each, but are not limited thereto, and are configured to be formed by two or four, respectively. may be (see FIG. 7 ).

In this case, a plurality of photocatalyst beads are densely arranged in the first space 142 and a plurality of zeolite beads are densely arranged in the third space 162 .

The maximum integration density of the photocatalyst beads and the zeolite beads may be close to 68% by volume ratio, and this dense arrangement is such that the polluted air flowing through the lower housing 180 by the fan is the zeolite module 160 and The speed of passing through the photocatalyst module 140 is rapidly reduced.

As described above, the photocatalyst module 140 and the zeolite module 160 of this embodiment induces some air to quickly move upward through the through hole, thereby maximizing the UV irradiated from the UV irradiation unit 120 . It has the effect of allowing the airflow to flow smoothly while receiving light.

For example, the third space 162 is formed in the same size as the first space 142 , and the fourth space 164 is formed in the same size as the second space 144 , , the second space 144 and the fourth space 164 are disposed at the same position in the vertical direction.

At this time, the second space portion 144 and the fourth space portion 164 are disposed at the same position in the vertical direction, thereby penetrating the photocatalyst module 140 and the zeolite module 16 in the vertical direction. A through hole is formed, and air rapidly moves outward through the through hole.

The through-hole is for securing an air flow passage in the central part of the filter 100 for an air purifier, and air moving through the slit-shaped through-hole passes through the third space 162 and the first space 142 . It draws air moving upward through the

The present applicant measured the flow rate and decomposition rate of circulated air by comparing the filter 100 for an air purifier of this embodiment with a control configured so that no through-holes are formed.

Measured flow
(m3/hour) 1 rotation time required
(minute) Decomposition rate per rotation (%) After 4 hours
Decomposition rate (%) control filter 5 12 4 43 Filter for air purifier of this embodiment 15 4 1.5 51

hour Control filter degradation (%) Filter decomposition rate (%) for this embodiment air purifier 30 minutes 10 11 1 hours 25 29 4 hours 43 51 8 hours 65 80

This experiment was conducted in accordance with the SPS-KACA002-132:2018 test method of KCL (Korea Institute of Construction and Living Environment Testing), and the air purifier filter 100 and the control filter according to this embodiment were each in a chamber of 1㎥ standard. A small air purifier was constructed and the filter efficiency according to the acetic acid (CH3COOH) removal ability was tested. (Fan 3500rpm, filter diameter 60 mm)

As a result of measuring the time it takes for the air cleaning inside the chamber to be completed, the circulation of the entire air by the filter 100 for an air purifier according to the present embodiment was made in about three times shorter time than in the case of the control group, and the total air The photocatalytic decomposition effect when rotated once is slightly lower in the case of the air purifier filter 100 than in the case of the control group, but when measured based on the same time, the photocatalytic decomposition effect is approximately that of the air purifier filter 100 An 18% improvement was achieved.

That is, it can be seen that when the air purifier including the filter 100 for the air purifier according to the present embodiment is continuously used, a better photocatalytic effect can be obtained compared to the prior art.

For example, the sum of the surface areas of each of the second spaces 144 is configured to be equal to the sum of the surface areas of each of the fourth spaces 164 , and the surface area of each of the second spaces 144 is the same. The sum of the first spaces 142 constitutes 3 to 30 percent of the sum of the surface areas of each of the first spaces 142 and the sum of the surface areas of each of the second spaces 144 .

The sum of the surface areas of each of the second spaces 144 is the sum of the surface areas of the respective first spaces 142 and the sum of the surface areas of each of the second spaces 144 , that is, 3 to 3 of the total surface area. When configured to be 30 percent, the circulation effect of the entire air by the air moving from the bottom to the top through the through hole can be increased. More preferably, when the sum of the surface area of the second space portion 144 relative to the total surface area is maintained at 5 to 15 percent, an optimal overall air circulation effect can be obtained.

As an example, the zeolite beads may be formed to have a volume that is two or more times larger than that of the photocatalytic beads, and this structure maintains the airflow rate of the contaminated air flowing into the lower part of the zeolite module 160 while maintaining the speed of the airflow. It is possible to reduce some and increase the residence time of the air flowing into the photocatalyst module 140 .

The zeolite beads or photocatalyst beads may each be formed of spherical beads of a single size, and when these spherical beads of a single size are most densely placed in the zeolite module 160 and the photocatalyst module 140, respectively, theoretically 73 It can be clustered up to percent, but practically can be placed at a level of 68 to 70 percent.

Therefore, when reducing the density of beads by 5 to 15 percent as in the above embodiment such that the sum of the surface area of the second space 144 relative to the total surface area is maintained at 5 to 15 percent, the above-described optimal overall air circulation effect can also get

That is, when the density of beads is arranged at a level of 59.5 to 64.6 percent, the above-described optimal overall air circulation effect can be obtained.

Although, when the density of beads is reduced, it is difficult to uniformly integrate and arrange the beads, and there may be a problem of noise generation according to the movement of the beads. can get

7 is a plan view of a photocatalyst module and a zeolite module according to another embodiment of the present invention, FIG. 8 is a perspective view of a photocatalyst module and a zeolite module according to another embodiment of the present invention, and FIG. 9 is another embodiment of the present invention 7 is a cross-sectional view of the filter for an air purifier according to FIG. 7 , and FIG. 10 is a cross-sectional view of the filter for an air purifier according to another embodiment of the present invention as viewed from the center of FIG. 7 .

In the filter 100 for an air purifier according to another embodiment of the present invention, at least one of the photocatalyst module 140 and the zeolite module 160 is configured to be rotatable about a central axis.

Rotation of the photocatalyst module 140 and/or the zeolite module 160 may function to adjust the circulation speed of the entire air, and it also serves to increase or decrease the pollution degree reduction function depending on the situation, such as the pollution degree of the air. .

For example, as shown in FIGS. 7 to 9 , when the zeolite module 160 is rotated by 30 degrees, it passes through the third space 162 of the zeolite module 160 and is contaminated by zeolite beads. A part of the air in which the purification process is performed can be quickly moved upward through the second space 144 of the photocatalyst module 140 . As another example, as the air introduced through the fourth space 164 of the zeolite module 160 moves through the first space 142 of the photocatalyst module 140, the purification process of contamination by the photocatalyst beads is performed. may be

This partial air pollution purification is configured such that the air introduced into the third space 162 passes through the first space 142, and the fourth space 164 and the second space 144 are Although the effect of reducing pollution during one air circulation is relatively low compared to the case of through-forming, it is possible to obtain the effect of increasing the effect of reducing pollution for the same time by increasing the overall air circulation speed.

A protrusion (not shown) may be formed on the zeolite module 160 and/or the photocatalyst module 140 so that the module can be rotated about the central axis.

The user may adjust the zeolite module 160 and/or the photocatalyst module 140 to properly purify the polluted air by rotating the zeolite module 160 and/or the photocatalyst module 140 in consideration of the degree of contamination of the indoor air, the number of occupants and the residence time.

As another example, the filter 100 for the air purifier may be controlled to automatically rotate the module based on a separate driving unit (not shown) and a control unit (not shown), and based on the measured air pollution level. may be

In the filter 100 for an air purifier according to another embodiment of the present invention, the photocatalyst module 140 and the zeolite module 160 have a fifth space 146 and a sixth penetrating through the center axis, respectively. and a space portion 166 .

The fifth space 146 and the sixth space 166 are formed by the rotation of either the photocatalyst module 140 or the zeolite module 160 to form the second space 144 and the fourth space 164 . ) plays a role of replacing and supplementing the through hole even when the size of the through hole is very small or almost disappears.

That is, even if either the photocatalyst module 140 or the zeolite module 160 rotates about the central axis, the fifth space 146 and the sixth space 166 always form through-holes in the vertical direction. , it becomes possible to increase the circulation rate of the entire air.

In the above, the present invention has been described in detail with reference to specific embodiments, but since the embodiments are merely examples for easy understanding of the present invention, substitutions, additions and modifications are made within the scope not departing from the technical spirit of the present invention. Embodiments will also fall within the protection scope of the present invention defined by the following claims.

100: filter for air purifier
110; Upper housing 120: UV irradiator
130, 150, 170: porous mesh
140: photocatalyst module 160: zeolite module
180: lower housing

Claims (7)

A filter inserted into the air purifier to purify polluted air,
an upper housing in which at least one side of the upper part is open;
a UV irradiator coupled to the lower portion of the upper housing and provided with a plurality of UV LEDs to irradiate UV to the lower housing;
a disk-shaped photocatalyst module located under the UV irradiation unit, provided with a plurality of photocatalyst beads containing a photocatalyst responding to UV, and having at least one through hole formed in the vertical direction;
a disk-shaped zeolite module located under the photocatalyst module, provided with a plurality of zeolite beads for adsorbing harmful substances from polluted air introduced through the lower housing, and having at least one through-hole formed in the vertical direction; and
It includes; a lower housing positioned below the zeolite module and having at least one lower side open.
A disk-shaped porous mesh is provided between the UV irradiation unit and the photocatalyst module, between the photocatalyst module and the zeolite module, and between the zeolite module and the lower housing,
The photocatalyst module has a hollow disk shape and consists of a radial frame provided at least two in the radial direction from the central axis and an annular frame formed in the circumferential direction, and a first space portion formed symmetrically by the radial frame and the annular frame at least two; Each of the two or more radial frames includes a second space formed through the upper and lower in a slit shape,
The zeolite module has a hollow disk shape and consists of a radial frame provided at least two in the radial direction from the central axis and an annular frame formed in the circumferential direction, and a third space formed symmetrically by the radial frame and the annular frame at least two; It includes a fourth space formed vertically penetrating in a slit shape on the inside of two or more radial frames, respectively,
A filter for an air purifier, characterized in that a plurality of photocatalyst beads are densely arranged in the first space portion and a plurality of zeolite beads are densely arranged in the third space portion.
delete According to claim 1,
the sum of the surface areas of each of the second spaces is equal to the sum of the surface areas of each of the fourth spaces,
The sum of the surface areas of each of the second spaces is 3 to 30 percent of the sum of the surface areas of each of the first spaces and the sum of the surface areas of each of the second spaces.
According to claim 1,
The third space portion is formed to have the same size as the first space portion, and the fourth space portion is formed to have the same size as the second space portion,
The filter for an air purifier, characterized in that the second space portion and the fourth space portion are disposed at the same position in the vertical direction.
According to claim 1,
The photocatalyst module and the zeolite module each include a fifth space portion and a sixth space portion formed vertically penetrating around a central axis.
According to claim 1,
At least one of the photocatalyst module and the zeolite module is configured to be rotatable about a central axis.
According to claim 1,
The photocatalyst bead is an air purifier filter, characterized in that it is formed by coating the titanium dioxide nanopowder adhered to the silicon oxide beads with an inorganic binder.

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