TWI532958B - Photo-catalytic air filter and method for making the same - Google Patents

Description

Photocatalyst air filter and manufacturing method thereof

The present invention relates to an air cleaner and a method of manufacturing the same, and more particularly to a photocatalyst air cleaner and a method of manufacturing the same.

At present, there are about five types of air purifiers on the market, including filter dust collection, activated carbon type, photocatalyst type, negative ion type and ozone type, and the pollutants are different. For example, photocatalyst-type cleaners mainly remove gaseous pollutants such as carbon dioxide and formaldehyde, and such models do not have any effect on particulate pollutants. Usually, the appropriate type of machine can be selected according to the condition of the pollutants in the home. Because ozone itself is a pollutant, it will damage the respiratory organs, and try to choose from the air filter type of filter dust collection type, activated carbon type and photocatalyst type.

Generally, photocatalysis refers to a process in which a chemical reaction occurs from the irradiation of light on a catalyst, causing the catalyst to be in an excited state, causing a change in a chemical molecule (or substance) in contact with the catalyst, and is used herein. The catalyst is called a photocatalyst.

Overview Photocatalyst air purifier integrates high-tech photocatalyst technology, UV lamp, high-efficiency filter system, granular activated carbon, laminated suspension filter cartridge, negative ion and other technologies to quickly decompose toxic and harmful gases (such as formaldehyde, benzene, toluene). , ammonia, TVOC, etc.), effectively killing various bacteria, molds, viruses, removing various odors, smoke, and adsorbing dust, can quickly and effectively improve indoor space Gas quality, providing a healthy living environment free from pollution and bacteria.

Under the action of ultraviolet light, the photocatalyst shifts electrons (e) on the valence band to the conduction band, and generates corresponding holes (h+) on the valence band to generate superoxide ion radicals and hydroxyl radicals with extremely strong oxidation. Superoxy hydroxyl radicals can not only oxidize and decompose toxic and harmful gases such as formaldehyde, benzene, toluene, xylene, ammonia, TVOC, etc., pollutants, odors, bacteria, etc. into harmless CO ₂ and H ₂ O, The pathogens have a good inhibition and killing effect. Generally, the antibacterial agent only has a bactericidal effect, but it cannot decompose the toxin. The photocatalyst can completely decompose the residual body of the bacteria and the residual toxin in the body, thereby achieving the purpose of thorough disinfection and sterilization. Furthermore, the photocatalyst does not change and loss itself, but only provides a reaction site. It has the advantages of long-lasting, continuous action, stable nature, safe and non-toxic, and does not cause secondary pollution. It is an internationally recognized green and pollution-free product. .

Anatase titanium dioxide is known as an effective photocatalyst material. Titanium dioxide can exhibit stronger oxidation capacity after being irradiated by ultraviolet light. Its maximum oxidation potential is 2.8 eV, and superoxide ions can be generated from oxygen (O ₂ ). ₂ ^- ), a hydroxide radical (.OH) can be produced from hydroxide ions (OH ^- ). However, when such a photocatalyst material is used, the light of the activated photocatalyst material needs to be ultraviolet light (265 nm) to excite the photocatalytic material to be excited to the conductive strip.

However, in practical applications, ultraviolet light sources are difficult to obtain, expensive, and energy consuming, so it is desirable to activate photocatalyst materials using UV LED (395 nm) light sources.

In addition, the nano photocatalyst air purifier is added to one or several nanometer photocatalyst air cleaning filters and ultraviolet lamps in the air purifier, which can not only be decomposed into the room. Volatile organic pollutants such as benzenes and aldehydes can effectively remove acid gases in the air, inhibit bacterial growth, and greatly improve indoor air quality.

In view of the above-described background of the invention, in order to meet the requirements of the industry, it is an object of the present invention to provide a photocatalyst air filter which can be a portable, fixed type and large air filter, respectively.

One of the objects of the present invention is to provide a photocatalyst air filter which forms a film on an object by using ultraviolet rays provided by the ultraviolet light emitting diode, activates the photocatalyst, and uses the photocatalyst material to retain the original shape of the object ( Conformally cover the object, and the formed film has good adhesion to the surface of the object, and the photocatalyst material has both photocatalytic effect and antibacterial effect.

In order to achieve the above object, in accordance with an embodiment of the invention, a photocatalyst air filter is disclosed, comprising: a housing comprising a channel; a photocatalyst film disposed in the channel; and a light emitting diode module The light emitted by the light-emitting diode module is disposed in the channel by effectively illuminating the photocatalyst film, wherein the light-emitting diode module comprises a plurality of ultraviolet-emitting light-emitting diodes; and a fan is disposed at one end of the channel. Used to draw in outside air from the other end of the passage, or to draw in outside air from the end where the fan is disposed.

In one embodiment, the photocatalyst air filter further includes: a driving circuit for controlling the LED module and providing power to the fan and the LED module.

In one embodiment, the photocatalyst film and the light emitting diode module are in the pass In the middle of the channel configuration.

In one embodiment, the channel further includes a plurality of side panels, and the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side panels to increase the contact area between the outside air and the photocatalyst coating film.

In one embodiment, the photocatalyst film is formed on a film by plasma-assisted chemical deposition, and remains intact on the object, and the object is disposed in the channel.

In one embodiment, the channel is formed by two wire-brushed stainless steel plates formed on one of the stainless steel plates, and the light-emitting diode module is disposed on another stainless steel plate.

In one embodiment, the channel is composed of two stainless steel plates, and the two stainless steel plates further comprise a plurality of side plates, and the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side plates, the light emitting diode The module is disposed on a surface of one of the two stainless steel plates that is not provided with the side panels.

In one embodiment, the channel is composed of two stainless steel plates, and the surface of the two stainless steel plates further has a plurality of concave and convex structures, and the photocatalyst film is originally covered and formed on the surface of the two stainless steel plates.

In one embodiment, the channel is formed of glass, and the photocatalyst film remains intact and formed on the glass.

In one embodiment, the photocatalyst air filter further includes: a mobile power source coupled to the driving circuit to provide power to the fan and the LED module.

In one embodiment, the light emitting diode module is a flexible ultraviolet light emitting diode module.

In one embodiment, the photocatalyst film is composed of a titanium dioxide precursor selected from the group consisting of titanium tetrachloride, titanium tetrachloride (Titanium Tetraisopropoxide), and titanium butoxide (Ti(OBu)). ₄ ) One or more materials in groups of Tetrabutyl titanate and Titanium tetrachloride.

Moreover, according to another embodiment of the present invention, a method for fabricating a photocatalyst air filter includes: providing a housing including a channel; forming a photocatalyst film in the channel; and providing a light emitting diode module, The light emitted from the light emitting diode module is disposed in the channel by effectively illuminating the photocatalyst film, wherein the light emitting diode module comprises a plurality of ultraviolet light emitting diodes; and a fan is disposed at one end of the channel To draw in outside air from the other end of the passage, or to draw in outside air from the end where the fan is disposed.

In one embodiment, the step of forming a photocatalyst film in the channel comprises: forming a film by using a plasma chemical vapor deposition method using a photocatalyst precursor; and performing an annealing treatment to form the photocatalyst film; The film is formed directly on the inner surface of the channel, or the film is formed on an object, and the object is placed in the channel.

In one embodiment, the photocatalyst precursor is selected from the group consisting of titanium tetrachloride, Titanium Tetraisopropoxide, titanium butoxide (Ti(OBu) ₄ ), and tetrabutyl titanate (Tetrabutyl titanate). And one or more materials in groups of titanium tetrachloride.

In one embodiment, in the above method, the channel is formed by two brushed stainless steel plates, the photocatalyst film is formed on one of the stainless steel plates, and the light emitting diode module is disposed on another stainless steel plate. on.

In an embodiment, the method further includes: providing a plurality of side panels in the channel, wherein the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side panels to increase the contact area between the outside air and the photocatalyst coating film. .

In one embodiment, in the above method, the channel is composed of two stainless steel plates, and a plurality of side panels are further disposed on the two stainless steel plates, and the photocatalyst film is simultaneously covered and formed on the plurality of side panels. The surface of the light-emitting diode module is disposed on a surface of one of the two stainless steel plates that is not provided with the side panels.

In one embodiment, in the above method, the channel is composed of two stainless steel plates, and a plurality of concave and convex structures are disposed on the surface of the two stainless steel plates, and the photocatalyst film is left in a original shape and formed on the two sheets. On the surface of the stainless steel plate.

In one embodiment, in the above method, wherein the channel is made of glass, the photocatalyst film remains intact and formed on the glass.

In one embodiment, the method further includes: providing a driving circuit for controlling the LED module and providing power to the fan and the LED module. In one embodiment, the method further includes: providing a mobile power source coupled to the driving circuit to provide power to the fan and the LED module.

According to the photocatalyst air cleaner of the present invention and the method of manufacturing the same, a portable, fixed type, and large air cleaner can be provided. Moreover, by using the flexible UV LED module, various types of air filters can be formed to excite the characteristics of the photocatalyst film to achieve a germicidal effect without being limited by the shape and configuration of the ultraviolet light source of the prior art.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation. In the drawings, the same components are denoted by the same reference numerals, and the components are not drawn to scale, and can be arbitrarily adjusted as needed.

1 shows a schematic view of a photocatalyst air cleaner 1 in accordance with an embodiment of the present invention. The photocatalyst air filter 1 includes a housing 100, a photocatalyst film 300, a light emitting diode module 400, a fan 500, and a driving circuit 600. The outer casing 100 includes a passage 200. The photocatalyst film 300 is disposed in the channel 200. The LED module 400 is configured such that the light emitted by the LED module 400 effectively illuminates the photocatalyst film 300 and is disposed in the channel 200. A fan 500 is disposed at one end 220 of the passage for drawing in outside air from the other end 210 of the passage. In this embodiment, the fan 500 is disposed at one end 220 of the channel. In another embodiment, FIG. 5 illustrates photocatalyst air filtration according to another embodiment of the present invention. A schematic diagram of the device 5 in which the fan 500 is disposed at the other end 210 of the passage, and the outside air is taken in by the end where the fan is disposed.

The material of the outer casing 100 may be made of plastic, glass or metal. The material of the outer casing 100 and the passage 200 may be the same or different. For example, the outer casing 100 may be constructed of an acrylic plate, and the passage 200 may be a stainless steel plate, which may be a flexible stainless steel plate that can be bent into various shapes. The above description is merely illustrative, and the present invention is not limited to the materials. For example, the channel 200 may be composed of a plastic substrate such as PMMA (acrylic sheet) or the like.

In one embodiment, the LED module 400 can include a plurality of ultraviolet light emitting diodes (UV LEDs). In addition, the LED module 400 can be a flexible UV LED module. Further, in one aspect, the photodiode module 400 can be formed with a photocatalyst film. A method for fabricating a flexible ultraviolet light-emitting diode module, for example, providing a conductive substrate and a plurality of ultraviolet light-emitting diode crystal grains; stamping the conductive substrate to pattern the conductive substrate The pattern includes at least an electrode circuit of the ultraviolet light-emitting diode and a plurality of support points; fixing the plurality of ultraviolet light-emitting diode chips on the conductive substrate; and the plurality of ultraviolet light-emitting diode crystal grains and the pattern The conductive substrate is electrically connected; the transparent encapsulant is filled, the transparent encapsulant covers the plurality of ultraviolet light-emitting diode crystal grains, and then the transparent encapsulant is cured; and the plurality of support points are removed to obtain the light-emitting diode mold group.

The driving circuit 600 is configured to control the LED module and provide power to the fan and the LED module.

Furthermore, Fig. 2 shows a schematic view of a photocatalyst air cleaner 2 according to another embodiment of the present invention. The photocatalyst air filter 2 is different from the photocatalyst air filter 1 in that the photocatalyst air filter 2 further includes a mobile power source 700 coupled to the driving circuit to provide power to the fan and the LED module. . In another embodiment, when the photocatalyst air filter does not include the mobile power source, the driving circuit can be directly connected to the AC power source to provide power to the fan and the LED module.

Furthermore, Fig. 3 shows a schematic view of a photocatalyst air cleaner 3 according to another embodiment of the present invention. The photocatalyst air filter 3 is different from the photocatalyst air filter 1 in that the channel 200 further includes a plurality of side flaps 230, which are simultaneously covered and formed on the surface of the plurality of side flaps 230. Increase the contact area between the outside air and the photocatalyst coating film. In another embodiment, the photocatalyst film 300 can be formed on a film by plasma-assisted chemical deposition, and the original film is covered on the object, and the object is placed in the channel, and the object can be Stainless steel plate, glass or other substrate. Furthermore, the surface of the object may have a concave-convex structure, that is, a rough surface to increase the contact area between the inflowing gas and the photocatalyst, thereby improving the cleaning effect. For example, Figure 6 shows a schematic view of a photocatalyst air cleaner 6 in accordance with another embodiment of the present invention. The channel surface of the photocatalyst air cleaner 6 has a plurality of concavo-convex structures, and a photocatalyst film 300 is formed on the surfaces of the concavo-convex structures. In another embodiment, the channel 200 can be formed by two wire-brushed stainless steel plates formed on one of the stainless steel plates, and the light-emitting diode module is disposed on another stainless steel plate. In another embodiment, the channel 200 is not limited to being composed of two stainless steel plates. It can be composed of one piece of brushed stainless steel plate bent.

Furthermore, Fig. 4 shows a schematic view of a photocatalyst air cleaner 4 according to another embodiment of the present invention. The photocatalyst air cleaner 4 differs from the photocatalyst air cleaner 3 in that the photocatalyst air cleaner 4 further includes a particulate filter 250 to further filter the particles.

Furthermore, the photocatalyst film 300 can be formed on an object by plasma-assisted chemical deposition or directly formed on the material constituting the channel. Thereby, the photocatalyst film 300 can form the cover of the object in a proper manner, and the formed film has good adhesion to the surface of the object, and the photocatalyst material has both a photocatalytic effect and an antibacterial effect. Specifically, for example, by using a plasma chemical vapor deposition method, a photocatalyst precursor is used to form a thin film; and an annealing treatment is performed to form the photocatalyst film; wherein the film is directly formed on the inner surface of the channel, or the film Formed on an object, and the object is placed in the channel.

For example, FIG. 7 is a cross-sectional view showing a channel of a photocatalyst air cleaner according to an embodiment of the present invention, wherein (a) shows that the cross section of the channel is curved, and the photocatalyst film 300 is formed on the arc surface according to the shape, and the outer casing 100 The cross section of the LED module 400 is also disposed on the bottom surface of the photocatalyst film 300; (b) the cross section of the channel is rectangular, and the photocatalyst film 300 is formed on the surface according to the rectangular shape ( The three sides of the rectangle are rectangular in shape, and the LED module 400 is disposed below, and the photocatalyst film 300 can be completely irradiated. FIG. 7 is merely an illustration, and the present invention is not limited to the above In the embodiment, the cross-sectional shape of the channel can be variously modified according to actual needs. In addition, in another embodiment, the photocatalyst film 300 can be simultaneously formed on the LED module 400 except for being formed on the surface of the channel (on three sides of the rectangle), because the thickness of the photocatalyst film 300 is extremely thin. Optically transparent film. Further, for example, FIG. 8 is a schematic view showing a passage of a photocatalyst air cleaner according to another embodiment of the present invention, wherein (a) shows a cross-sectional view, (b) shows a side view, and 240 shows a piece of stainless steel mesh. (For example, the mesh has a pore size of 20 μm) or a stainless steel sheet with holes, firstly after the photocatalyst film is formed on the surface thereof (using the above method for forming a photocatalyst film), the stainless steel mesh is pleated (pleated stainless steel mesh) A pleated stainless steel porous plate is disposed in the channel 200.

In one embodiment, the photocatalyst precursor is selected from the group consisting of titanium tetrachloride, Titanium Tetraisopropoxide, titanium butoxide (Ti(OBu) ₄ ), and tetrabutyl titanate (Tetrabutyl titanate). And one or more materials in groups of titanium tetrachloride.

Furthermore, another embodiment of the present invention provides a method of fabricating a photocatalyst air cleaner. The manufacturing method of the photocatalyst air filter includes the following steps:

Step S10: providing a casing, including a channel;

Step S20: forming a photocatalyst film in the channel;

Step S30: setting a light-emitting diode module, such that the light emitted by the light-emitting diode module is effectively irradiated to the photocatalyst film and disposed in the channel, wherein the light-emitting diode module comprises a plurality of ultraviolet light-emitting lights Diode

Step S40: setting a fan at one end of the channel for drawing in outside air from the other end of the channel, or drawing in outside air from one end where the fan is disposed.

Step S50: A driving circuit is provided for controlling the LED module, and power is supplied to the fan and the LED module.

Furthermore, in one embodiment, the step of forming a photocatalyst film in the channel (step S20) comprises: forming a film by using a plasma chemical vapor deposition method using a photocatalyst precursor; and performing annealing treatment to form The photocatalyst film; wherein the film is formed directly on an inner surface of the channel, or the film is formed on an object, and the object is disposed in the channel.

In summary, according to the photocatalyst air cleaner of the present invention and the manufacturing method thereof, a portable, fixed type and large air cleaner can be provided, that is, the above configuration can be arbitrarily enlarged or reduced according to practical applications. Moreover, by using the flexible UV LED module, various types of air filters can be formed to excite the characteristics of the photocatalyst film to achieve a germicidal effect without being limited by the shape and configuration of the ultraviolet light source of the prior art.

The present invention has been described in detail with reference to the preferred embodiments of the present invention, and the scope of the invention is not limited thereto, and it is understood that various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

1,2,3,4,5,6‧‧‧catalyst air filter

100‧‧‧ Shell

200‧‧‧ channel

210‧‧‧The other end of the channel

One end of the 220‧‧‧ channel

230‧‧‧Flanking panels

240‧‧‧Stainless steel mesh or stainless steel with holes

250‧‧‧Particulate Filter

300‧‧‧Photocatalyst film

400‧‧‧Lighting diode module

500‧‧‧fan

600‧‧‧ drive circuit

700‧‧‧Mobile power supply

1 shows a schematic view of a photocatalyst air cleaner in accordance with an embodiment of the present invention.

2 shows a schematic view of a photocatalyst air cleaner in accordance with another embodiment of the present invention.

Figure 3 shows a schematic view of a photocatalyst air filter in accordance with another embodiment of the present invention.

Figure 4 shows a schematic view of a photocatalyst air filter in accordance with another embodiment of the present invention.

Figure 5 shows a schematic view of a photocatalyst air filter in accordance with another embodiment of the present invention.

Figure 6 shows a schematic view of a photocatalyst air filter in accordance with another embodiment of the present invention.

7(a) and 7(b) are schematic cross-sectional views showing a channel of a photocatalyst air cleaner according to an embodiment of the present invention.

Figure 8 is a schematic view showing a passage of a photocatalyst air cleaner according to another embodiment of the present invention, wherein (a) shows a cross-sectional view and (b) shows a side view.

100‧‧‧ Shell

200‧‧‧ channel

210‧‧‧The other end of the channel

One end of the 220‧‧‧ channel

300‧‧‧Photocatalyst film

400‧‧‧Lighting diode module

500‧‧‧fan

600‧‧‧ drive circuit

Claims (17)

A photocatalyst air filter comprises: a casing comprising a channel; a photocatalyst film disposed in the channel; and a light emitting diode module to enable the light emitted by the LED module to effectively illuminate the photocatalyst a light film is disposed in the channel, wherein the light emitting diode module comprises a plurality of ultraviolet light emitting diodes, the photocatalyst film and the light emitting diode module are disposed opposite to each other in the channel; a fan is disposed One end of the passage for drawing in outside air from the other end of the passage, or inhaling outside air by one end of the fan; wherein the photocatalyst film is a film formed on an object by plasma-assisted chemical deposition And retaining the original shape on the object, the object is disposed in the channel; in the channel, further comprising a plurality of side panels, the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side panels to increase The contact area of the external air with the photocatalyst film; the photocatalyst precursor is selected from the group consisting of titanium tetrachloride and titanium tetrachloride (Titanium Tetraisopropoxide) And a material of one or more groups of titanium butoxide (Ti(OBu) ₄ ), Tetrabutyl titanate, and Titanium tetrachloride. The photocatalyst air filter of claim 1, further comprising: a driving circuit for controlling the LED module and providing power to the The fan and the LED module. The photocatalyst air cleaner according to claim 1, wherein the channel is composed of two brushed stainless steel plates formed on one of the stainless steel plates, and the light emitting diode mold The set is placed on another stainless steel plate. The photocatalyst air cleaner according to claim 1, wherein the channel is composed of two stainless steel plates, and the two stainless steel plates further comprise a plurality of side plates, and the photocatalyst film is simultaneously covered and formed in the original shape. The surface of the plurality of side panels is disposed on a surface of one of the two stainless steel sheets that is not provided with the side panels. The photocatalyst air cleaner of claim 1, wherein the channel is made of glass, and the photocatalyst film remains intact and formed on the glass. The photocatalyst air filter of claim 2, further comprising: a mobile power source coupled to the driving circuit to provide power to the fan and the LED module. The photocatalyst air filter of claim 1, wherein the light emitting diode module is a flexible ultraviolet light emitting diode module. The photocatalyst air filter of claim 1, further comprising: a particulate filter disposed in the channel to prevent ultraviolet rays from being irradiated to the photocatalyst film for filtering the particles. A method of fabricating a photocatalyst air filter, comprising: providing a casing, the channel comprising a channel; forming a photocatalyst film in the channel, using a plasma chemical vapor deposition method, using a photocatalyst precursor to form a film, and Annealing to form the photocatalyst film, wherein the film is formed directly on the inner surface of the channel, or the film is formed on an object, and the object is disposed in the channel, the photocatalyst precursor is selected from Tetratitanium tetrachloride, titanium tetrachloride (Titanium Tetraisopropoxide), titanium butoxide (Ti(OBu) ₄ ), tetrabutyl titanate (Titrabutyl titanate), titanium tetrachloride (Titanium tetrachloride) One or more materials of the group; a light-emitting diode module is disposed, the light emitted by the light-emitting diode module is effectively irradiated to the photocatalyst film, and the light-emitting diode module comprises a plurality of a light-emitting diode of ultraviolet light; a fan is disposed at one end of the channel for drawing in outside air from the other end of the channel, or by setting the wind One end of the fan draws in outside air; a plurality of side flaps are disposed in the passage, wherein the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side panels to increase the contact area of the outside air with the photocatalyst film. The method of claim 9, wherein the channel is composed of two brushed stainless steel plates, the photocatalyst film is formed on one of the stainless steel plates, and the light emitting diode module is disposed on the other A stainless steel plate. The method of claim 9, wherein the channel is composed of 2 The sheet of stainless steel is formed, and a plurality of side panels are further disposed on the two stainless steel plates, and the photocatalyst film is simultaneously covered and formed on the surface of the plurality of side panels, and the LED module is disposed on the two sheets One of the stainless steel plates is not provided on the surface of the side panels. The method of claim 9, wherein the channel is formed by bending one piece of stainless steel plate, and a plurality of concave and convex structures are disposed on the surface of the stainless steel plate, and the photocatalyst film is retained and formed in the original shape. a surface of the stainless steel plate and a light emitting surface of the light emitting diode module. The method of claim 9, wherein the channel is composed of glass, and the photocatalyst film remains intact and formed on the glass. The method of claim 9, further comprising: providing a driving circuit for controlling the LED module and providing power to the fan and the LED module. The method of claim 9, further comprising: providing a mobile power source coupled to the driving circuit to provide power to the fan and the LED module. The method of claim 9, further comprising: disposing a particulate filter in the channel to prevent ultraviolet rays from being irradiated onto the photocatalyst film for filtering the particles. The photocatalyst air cleaner of claim 1, wherein the channel is composed of a pleated stainless steel mesh or a pleated stainless steel porous plate, the photocatalyst film At the same time, the surface of the stainless steel sheet having the holes which is originally covered and formed on the pleated stainless steel mesh or pleats is retained.