Air purification composite material, air purification device and air purification system

Abstract

The invention discloses an air purification composite material, an air purification device and an air purification system.The air purification composite material comprises a main catalysis inner layer, a middle reinforcement layer and a protection outer layer which are sequentially arranged, the main catalysis inner layer is composed of WO3 and W18O49, the middle reinforcement layer is composed of WO3 and ZnO, and the protection outer layer is composed of WO3, a manganese-based catalyst and a nickel-based catalyst. According to the air purification composite material, tungsten oxide serves as a main catalyst for optical excitation and is combined with a manganese-based catalyst and a nickel-based catalyst, the hydrophilic characteristic of the air purification composite material is created, and the catalytic reaction is improved to the maximum extent. Besides, visible light is used for catalysis, a photocatalytic oxidation or heterogeneous photocatalytic process is used for converting water molecules in a very small proportion in the air into hydrogen peroxide, organisms of bacteria and viruses in the air are efficiently broken, and the purpose of air sterilization and disinfection is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purification, and in particular relates to an air purification composite material, an air purification device and an air purification system. Background Art

[0002] There are many methods of eliminating pathogens and chemicals, such as filters (both passive and active) that do not actually eliminate pathogens, but rather filter them or retain them, etc. These devices are applied to block air with unwanted pathogens from entering a space, or if the devices are placed within an air recirculation system, they can block these pathogens. These devices block particulate matter (PM) primarily in a passive manner, they work like a mesh, and any particles larger than the "holes" in the mesh will be captured. Since the "holes" in the mesh can be made of different sizes, they can capture larger or smaller particles depending on the size.

[0003] Traditional filter technologies have some issues like they have a very high impact on the air conditioning system due to their pressure drop as fans are needed to push the air through these filters, they need to be very powerful due to the small size of these holes, there are some side effects due to the power required which include power consumption and noise, in addition, these devices can only eliminate these particles in the air, they do not have the ability to eliminate any particles on the surface. Due to the very small size of pathogens, these filters need to be very effective to stop pathogens such as viruses. In addition, these technologies have some issues like they deteriorate over time and need to be replaced frequently as they get clogged and lose efficiency over time.

[0004] Other technologies, such as UV lights, can be used to eliminate pathogens, but these lights need to illuminate pathogens at specific frequencies (253.7 nanometers) to kill them, and these frequencies are very harmful to people, so they cannot be used in open spaces with people, so they are not effective in protecting people from cross-infection in a space with multiple people present.

[0005] There are other technologies such as photocatalysts that can eliminate pathogens, but so far, the main ones used are catalysts based on titanium dioxide, which is currently considered a carcinogen, so these devices should not be used in places where people are present, and titanium dioxide requires the use of 253.7 nanometers of ultraviolet light to be effective, so very special UV lamps need to be used, and these UV lamps need to be hidden because they are extremely harmful to people and animals. As a technician in this field, it is necessary to provide a completely new air purification solution. Summary of the invention

[0006] The object of the present invention is to provide an air purification composite material, an air purification device and an air purification system, so as to solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above-mentioned purpose, in the first aspect, the present invention adopts the following technical scheme: an air purification composite material for purifying air and the surface of an object, comprising a main catalytic inner layer, an intermediate reinforcement layer and a protective outer layer arranged in sequence, wherein the main catalytic inner layer is composed of WO3 and W 18 O 49 The intermediate reinforcement layer is composed of WO3 and ZnO, and the protective outer layer is composed of WO3, a manganese-based catalyst and a nickel-based catalyst.

[0008] As an optional implementation of the above technical solution, the proportion of WO3 in the main catalytic inner layer is 90%, 18 O 49 The proportion is 10%.

[0009] As an optional implementation of the above technical solution, the proportion of WO3 and ZnO in the intermediate reinforcement layer is 50%.

[0010] As an optional implementation of the above technical solution, the proportion of WO3 in the protective outer layer is 50%, the proportion of manganese-based catalyst is 20%, and the proportion of nickel-based catalyst is 30%.

[0011] In a second aspect, the present invention adopts the following technical scheme: an air purification device, comprising the above-mentioned air purification composite material, and also comprising a control module, a light source module, a mounting frame and a catalyst carrier plate, the catalyst carrier plate being provided with holes allowing air flow, the air purification composite material being attached to the surface of the catalyst carrier plate and the inner wall of the holes; the control module being electrically connected to the light source module, the light-emitting body of the light source module extending into the interior of the mounting frame, and the mounting frame being provided with a mounting groove adapted to the catalyst carrier plate.

[0012] As an optional implementation of the above technical solution, the light source module includes a heat dissipation shell, a lamp holder and a light-emitting body. The lamp holder is arranged in the heat dissipation shell, and the light-emitting body is installed on the lamp holder.

[0013] As an optional implementation of the above technical solution, the surface of the heat dissipation shell is provided with heat dissipation holes and wire connection holes.

[0014] As an optional implementation of the above technical solution, mounting grooves are provided on opposite sides of the mounting frame, and the light-emitting body is arranged between the two mounting grooves.

[0015] As an optional implementation of the above technical solution, a reflective protrusion is provided on the inner wall of the mounting frame, and the reflective protrusion is used to reflect light to the catalyst carrier plate.

[0016] As an optional implementation of the above technical solution, the mounting frame is made of aluminum alloy.

[0017] As an optional implementation of the above technical solution, the distance between the luminous body and the catalyst carrier plate is 1 cm-2 cm.

[0018] As an optional implementation of the above technical solution, the light-emitting body is an ultraviolet lamp.

[0019] As an optional implementation of the above technical solution, the catalyst carrier plate is a honeycomb plate, and the hole spacing of the honeycomb plate is not less than 5 mm.

[0020] In the third aspect, the present invention adopts the following technical solution: an air purification system, comprising the above-mentioned air purification device, and also comprising a control center, wherein the control center is connected to a sensor module, and the sensor module is used to obtain environmental parameters so that the control center instructs each control module to turn on or off the corresponding light source module.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides an air purification composite material, an air purification device and an air purification system. The air purification composite material uses tungsten oxide as the main catalyst for light excitation, and is combined with a manganese-based catalyst and a nickel-based catalyst to create the hydrophilic property of the air purification composite material and maximize the catalytic reaction. In addition, the present invention uses visible light for catalysis, and utilizes the process of photocatalytic oxidation or heterogeneous photocatalysis to convert a very small proportion of water molecules in the air into hydrogen peroxide, which efficiently destroys the organisms of bacteria and viruses in the air, thereby achieving the purpose of air sterilization and disinfection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an air purification device in one embodiment of the present invention;

[0024] Figure 2 is an exploded schematic diagram of an air purification device in one embodiment of the present invention;

[0025] Figure 3 is an exploded schematic diagram of a reflective protrusion in one embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of an air purification system in one embodiment of the present invention.

[0027] In the figure: 1-control module; 2-light source module; 3-mounting frame; 4-catalyst carrier plate; 5-heat dissipation shell; 6-lamp holder; 7-light emitter; 8-heat dissipation hole; 9-wire connection hole; 10-reflective protrusion; 11-control center; 12-sensor module; 13-PCB board; 14-plastic box; 15-bracket structure. DETAILED DESCRIPTION

[0028] This embodiment provides an air purification composite material for purifying air and the surface of an object, comprising a main catalytic inner layer, an intermediate reinforcement layer and a protective outer layer arranged in sequence, wherein the main catalytic inner layer is composed of WO3 and W 18 O 49 The intermediate reinforcement layer is composed of WO3 and ZnO, and the protective outer layer is composed of WO3, a manganese-based catalyst and a nickel-based catalyst. The manganese-based catalyst can be a MnO2 catalyst, and the nickel-based catalyst can be a nickel nanoparticle co-catalyst. The air purification composite material can release hydrogen peroxide, which can not only purify the air and kill bacteria and viruses in the air, but also decompose and eliminate bacteria, viruses and chemical pollutants attached to the surface of objects.

[0029] The main catalytic inner layer, as the main catalyst, can enhance the absorption of wide-frequency light and realize the photocatalytic process of visible light. The middle enhancement layer has direct catalytic and auxiliary catalytic functions, which can enhance and control the photocatalytic process. The protective outer layer is in direct contact with the air, which has a direct catalytic function, and can improve air friction and water retention capacity, thereby improving the air purification effect.

[0030] Specifically, the proportion of WO3 in the main catalytic inner layer is 90%, 18 O 49 The proportion of WO3 and ZnO in the intermediate reinforcement layer is 50%. The proportion of WO3 in the protective outer layer is 50%, the proportion of manganese-based catalyst is 20%, and the proportion of nickel-based catalyst is 30%.

[0031] One purpose of the present invention is to solve the problem of eliminating pathogens (bacteria and viruses) and provide a new air purification composite material that can be impregnated into any surface, which can be a wall, a plastic base or an aluminum base. It uses a wide range of light frequencies from 180nm to above 400nm, and even visible light to catalyze the production of hydrogen peroxide. It uses photocatalytic oxidation or heterogeneous photocatalysis to convert a very small proportion of water molecules into hydrogen peroxide, thereby achieving air purification function.

[0032] The hydrogen peroxide produced by the present invention has a relatively stable concentration in the air (between 0.03 and 0.05 ppm), creating a completely safe and healthy environment that can eliminate pathogens in the air and on surfaces, but the concentration is maintained far below the 1 ppm limit stipulated by standards such as ASHRAE, CDC and ECHA, which means no harm to humans or animals.

[0033] The present invention completely eliminates the need for harmful ultraviolet (253.7 nanometer) light and can be used indoors and outdoors because visible light can be effectively used to irradiate the composite material, including sunlight. In addition, the present invention can use higher frequency and safer ultraviolet light (upper range above 350 nanometers), which can irradiate the substrate, making it safer than previous equipment, and achieving the function of eliminating pathogens from the air and surfaces.

[0034] The air purification composite material in the present invention is mainly tungsten oxide, which is the main catalyst for attracting light and generating reactions. The air purification composite material can form a coating on a substrate, and the coating has a multi-layer structure, each layer has different components and thicknesses, has different functions, and has different chemical compositions. Tungsten is mixed with other chemicals such as manganese, silver or nickel in different concentrations, depending on the depth of the layer, the inner layer focuses more on catalysis, and the outer layer focuses more on water entrainment or attraction. The shape and irregularity of these layers will also affect the catalytic efficiency, because the uneven outer surface will allow higher air friction and higher water capture, as well as better hydrogen peroxide conversion efficiency per square centimeter of substrate surface.

[0035] Compared with the prior art, the present invention has the following characteristics:

[0036] 1. The air purification composite material of the present invention does not contain titanium dioxide. It adopts a completely different chemical composition, using tungsten oxide as the main catalyst for light excitation, and combining it with manganese-based catalysts and nickel-based catalysts to create the hydrophilic properties of the air purification composite material, further attracting water molecules and maximizing the catalytic reaction.

[0037] 2. Absorption of visible light. Unlike TiO2 which only absorbs ultraviolet light, the air purification composite material of the present invention can absorb visible light due to its narrow band gap and the presence of oxygen vacancies in the material. The defect states generated by these vacancies can be excited by visible light.

[0038] 3. Efficient charge separation. The air purification composite material of the present invention has a high electron mobility and can effectively separate photoinduced electron-hole pairs, thereby enhancing photocatalytic activity. This is particularly important for applications requiring long-term stability and durability because it reduces the risk of charge recombination and photocorrosion.

[0039] 4. Adjustable properties. The air purification composite material of the present invention has an adjustable band gap, which can be adjusted by controlling the size and shape of the nanoparticles, which allows fine-tuning of the photocatalytic activity and can match the absorption spectrum of the light source.

[0040] 5. Broad spectral response. In addition to visible light absorption, the air purification composite material of the present invention responds to a wide range of light sources, including ultraviolet light, blue light and green light, which makes it a versatile photocatalyst that can be used in various applications requiring light of different wavelengths.

[0041] 6. Improve catalytic efficiency. The air purification composite material of the present invention can achieve higher reaction rate and conversion efficiency due to its high photocatalytic activity and efficient charge separation, which leads to more efficient use of energy and resources in photocatalytic applications.

[0042] like Figure 1 and Figure 2 As shown, this embodiment also provides an air purification device, including the above-mentioned air purification composite material, and also includes a control module 1, a light source module 2, a mounting frame 3 and a catalyst carrier plate 4, the catalyst carrier plate 4 is provided with holes allowing air flow, and the air purification composite material is attached to the surface of the catalyst carrier plate 4 and the inner wall of the hole; the control module 1 is electrically connected to the light source module 2, the light-emitting body 7 of the light source module 2 extends into the interior of the mounting frame 3, and the mounting frame 3 is provided with a mounting groove adapted to the catalyst carrier plate 4.

[0043] The control module 1 comprises a PCB board 13, which is enclosed in a plastic box 14. The PCB board 13 can be used to control the opening or closing of the light emitter 7. The PCB board 13 has a wireless / wired communication module, which allows remote connection and remote control of the device, and can also detect any faults of the device. The control module 1 will react to external environmental events, such as occupancy, light, carbon dioxide or wind, so that the light emitter 7 can be automatically turned on or off according to pre-configured needs. Preferably, the spacing between the light emitter 7 and the catalyst carrier plate 4 is 1cm-2cm, and the light emitter 7 is a UV lamp.

[0044] The light source module 2 includes a heat dissipation housing 5, a lamp holder 6 and a light emitter 7, wherein the lamp holder 6 is arranged in the heat dissipation housing 5, the light emitter 7 is mounted on the lamp holder 6, and the surface of the heat dissipation housing 5 is provided with a heat dissipation hole 8 and a wire connection hole 9. The lamp holder 6 carries the power supply element and the light emitter 7, so that the light emitter 7 is irradiated onto the air purification composite material, thereby starting the conversion of water vapor to hydrogen peroxide. The light emitter 7 is used to provide the energy required by the catalyst to start the catalytic reaction, thereby starting the oxidation process. A very important aspect of the present invention is that, since the catalyst used is different from previous technologies, it can catalyze within the upper limit of ultraviolet rays, such as exposing the device to natural visible light, it can also fully achieve photocatalysis. The light emitter 7 can be a single light emitter or a plurality of light emitters, and they can also be any kind of light emitters, including ordinary ultraviolet lamps, LED lamps, and even natural visible light.

[0045] The mounting frame 3 is provided with mounting grooves on opposite sides, the luminous body 7 is arranged between the two mounting grooves, the catalyst carrier plates 4 are arranged in the two mounting grooves, and the holes of the two catalyst carrier plates 4 form convection. The mounting frame 3 is made of aluminum alloy, such as Figure 3 As shown, the inner wall of the mounting frame 3 is provided with a reflective protrusion 10, and the reflective protrusion 10 is used to reflect light to the catalyst carrier plate 4. The luminous body 7 is enclosed in an aluminum mounting frame 3, which can accommodate the components of the luminous body 7 and also avoid rust, and provides a reflective protrusion 10 to form a special reflective surface, so as to improve the efficiency of the oxidation process by maximizing the use of the catalytic surface. Among them, both ends of the mounting frame 3 have reflective protrusions 10 inside to form a reflective area to maximize the incidence of light on the catalyst, thereby maximizing its photocatalytic effect and the effectiveness of the device.

[0046] In a specific embodiment, the catalyst carrier plate 4 is a honeycomb plate. The present invention has one or more honeycomb plates, on which an air purification composite material is coated, and air flows through the honeycomb plates. These honeycomb plates can have any size or shape, as long as they allow air to flow through, so as to maximize the attachment area of ​​the air purification composite material. In order to allow the air flow to pass through the honeycomb plate without being affected, the hole spacing of the honeycomb plate is not less than 5mm, and the thickness of these honeycomb plates is preferably not less than 1 cm, so that the irradiation rate of the luminous body 7 is maximized. It should be noted that the catalyst carrier plate 4 can be made of plastic, aluminum or any other material that is easy to impregnate, and the catalyst carrier plate 4 can remain intact or cracked.

[0047] The air purification composite material has no ozone generation and does not require special UV lamps, so the device does not emit harmful chemicals, and the substrate can be safely used in any wall, air purification equipment, HVAC system, etc. The present invention can be used alone in any duct or air handling system (unit or duct), or it can be embedded in an air purifier or any device that can generate airflow. In addition, it can be placed anywhere where sunlight can directly shine, but in this case, its structure will be greatly changed from the structure shown.

[0048] like Figure 4 As shown, this embodiment also provides an air purification system, including the above-mentioned air purification device, and also includes a control center 11, the control center 11 is connected to a sensor module 12, and the sensor module 12 is used to obtain environmental parameters so that the control center 11 instructs each control module 1 to turn on or off the corresponding light source module 2.

[0049] According to the design scheme of the present invention, one or more luminous bodies 7, a single or multiple control modules 1 and a single or multiple sensor modules 12 may be provided. In the case of only one luminous body 7, the control center 11 may not be provided, and the sensor module 12 is connected to the control module 1, and the control module 1 is used to control the luminous body 7. The luminous bodies 7 are placed in such a way that they can produce the maximum irradiation to the air purification composite material, so that the air purification composite material produces the maximum catalytic effect. Figure 4 Also shown is a support structure 15 of the control center 11 so that it can have the best effect when used in an air duct or other air purifier.

[0050] Mounting frame 3 is made of aluminum because it has a high reflectivity and will help increase the amount of light that impacts the catalyst, minimizing shadow areas and maximizing oxidation results. It will also allow the light to impact the photocatalyst at different angles, which is ideal for energy absorption and optimal oxidation results.

[0051] For UV and LED lamps, the optimum distance between the luminous body 7 and the catalyst carrier plate 4 is about 1 to 2 cm, and the catalytic effect will decrease slightly when working at a greater distance. This needs to be adjusted according to actual conditions to maximize the utilization of the air purification composite material and minimize shadows. LED lamps can be used like ordinary lamps as long as their emission frequency is within the above range and has the best effect on the catalyst.

[0052] The luminous body 7 can use a single tube, double tube (U or H) or quadruple tube UV lamp according to the size and shape of the device and the required power parameters. The luminous body 7 can be placed before the catalyst carrier plate 4, after the catalyst carrier plate 4 or between the catalyst carrier plates 4. The catalyst carrier plate 4 can be applied to the wall, and the surface elimination of pathogens can be carried out as long as there is sunlight, without the need for any other luminous body 7 or any power consumption.

[0053] The present invention provides a novel technology for eliminating pathogens and chemicals from air and surfaces, which can be catalyzed by artificial light or natural light (sunlight), can receive ultraviolet light, and oxidize water in the air. When water molecules are deposited on the air purification composite material, the air purification composite material uses the photo-oxidation process to convert water molecules into hydrogen peroxide molecules. When the air purification composite material is on an outdoor surface, the generated hydrogen peroxide will purify the coating surface (walls, floors, ceilings), and when the air purification composite material is part of a device installed in an air duct or any other air flow, the hydrogen peroxide will be able to flow out of the device to eliminate pathogens in the air and the surfaces it contacts.

[0054] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. An air purification composite material, characterized in that: It is used to purify the air and the surface of objects, and comprises a main catalytic inner layer, an intermediate reinforcement layer and a protective outer layer arranged in sequence, wherein the main catalytic inner layer is made of WO3 and W 18 O 49 The intermediate reinforcement layer is composed of WO3 and ZnO, and the protective outer layer is composed of WO3, a manganese-based catalyst and a nickel-based catalyst.

2. The air purification composite material according to claim 1, characterized in that: The proportion of WO3 in the main catalytic inner layer is 90%, 18 O 49 The proportion is 10%.

3. The air purification composite material according to claim 1, characterized in that: The proportion of WO3 and ZnO in the intermediate reinforcement layer is 50% each.

4. The air purification composite material according to claim 1, characterized in that: The protective outer layer contains 50% WO3, 20% manganese-based catalyst and 30% nickel-based catalyst.

5. An air purification device, characterized in that: The invention comprises an air purification composite material as described in any one of claims 1 to 4, and further comprises a control module (1), a light source module (2), a mounting frame (3) and a catalyst carrier plate (4), wherein the catalyst carrier plate (4) is provided with holes for allowing air flow, and the air purification composite material is attached to the surface of the catalyst carrier plate (4) and the inner wall of the hole; the control module (1) is electrically connected to the light source module (2), the luminous body (7) of the light source module (2) extends into the interior of the mounting frame (3), and the mounting frame (3) is provided with a mounting groove adapted to the catalyst carrier plate (4).

6. The air purification device according to claim 5, characterized in that: The light source module (2) comprises a heat dissipation housing (5), a lamp holder (6) and a light emitter (7); the lamp holder (6) is arranged in the heat dissipation housing (5), and the light emitter (7) is mounted on the lamp holder (6).

7. The air purification device according to claim 6, characterized in that: The surface of the heat dissipation housing (5) is provided with heat dissipation holes (8) and electric wire connection holes (9).

8. The air purification device according to claim 6, characterized in that: The mounting frame (3) is provided with mounting grooves on opposite sides, and the luminous body (7) is arranged between the two mounting grooves; the inner wall of the mounting frame (3) is provided with a reflective protrusion (10), and the reflective protrusion (10) is used to reflect light to the catalyst carrier plate (4).

9. The air purification device according to claim 6, characterized in that: The mounting frame (3) is made of aluminum alloy; the spacing between the luminous body (7) and the catalyst carrier plate (4) is 1 cm-2 cm; the luminous body (7) is an ultraviolet lamp; the catalyst carrier plate (4) is a honeycomb plate, and the hole spacing of the honeycomb plate is not less than 5 mm.

10. An air purification system, characterized in that: An air purification device comprising any one of claims 5 to 9, further comprising a control center (11), wherein the control center (11) is connected to a sensor module (12), wherein the sensor module (12) is used to obtain environmental parameters so that the control center (11) instructs each control module (1) to turn on or off a corresponding light source module (2).

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