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

Abstract

Disclosed in the present application are an air purification composite material, an air purification device and an air purification system. The air purification composite material comprises a main catalytic inner layer, an intermediate reinforcement layer and a protective outer layer, which are sequentially arranged, wherein the main catalytic inner layer is composed of WO3 and W18O49; 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. In the air purification composite material of the present application, tungsten oxide serves as a main catalyst for optical excitation and is combined with the manganese-based catalyst and the nickel-based catalyst, thereby creating the hydrophilic characteristic of the air purification composite material, and accelerating a catalytic reaction to the maximum extent. In addition, visible light is used for catalysis in the present application, and by means of using a photocatalytic oxidation or heterogeneous photocatalysis process, water molecules in a very small proportion in the air is converted into hydrogen peroxide, and organisms of bacteria and viruses in the air are efficiently broken, thereby achieving the purpose of air sterilization and disinfection.

Description

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

[0001] The present application belongs to the technical field of air purification, and particularly relates to an air purification composite material, an air purification device and an air purification system. BACKGROUND

[0002] There are many methods for eliminating pathogens and chemicals, such as filters (including passive and active), which in fact do not eliminate pathogens, but filter them or retain them, etc. These devices are applied to prevent air with unwanted pathogens from entering a space, or if they are placed in an air recirculation system, they can prevent these pathogens. These devices mainly block particulate matter (PM) in a passive way, they work like a mesh, any particle larger than the "holes" on the mesh is captured. Since the "holes" in the mesh can be made of different sizes, according to different sizes, they can capture larger or smaller particles.

[0003] Traditional filter technology has some problems, such as having a very large impact on air conditioning systems due to its pressure drop, since the fan needs to push the air through these filters, since the size of these holes is very small, they need to be very powerful, due to the power required, there are some side effects, including power consumption and noise, in addition, these devices can only eliminate these particles from the air, they have no ability to eliminate any particles from the surface. Since the size of the pathogens is very small, these filters need to be very effective to stop pathogens such as viruses. In addition, these technologies also have some problems, such as deteriorating over time, requiring frequent replacement, since they will be clogged and lose efficiency over time.

[0004] Other technologies, such as ultraviolet lamps, can be used to eliminate pathogens, but these lamps need to irradiate pathogens with a specific wavelength (253.7 nanometers) to kill them, these wavelengths are harmful to humans, so they cannot be used in open spaces with people, so they cannot effectively protect people from cross-infection in a space with many people present.

[0005] There are other technologies such as photocatalysts that can eliminate pathogens, but so far the main catalyst used is based on titanium dioxide, which is currently considered a carcinogen, so these devices should not be used in places with people, and titanium dioxide needs to use ultraviolet light of 253.7 nanometers to be effective, so very special ultraviolet lamps are needed, and these ultraviolet lamps need to be hidden, they are extremely harmful to humans and animals. As a person skilled in the art, it is necessary to provide a completely new air purification solution. SUMMARY

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

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

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

[0009] As an optional implementation form of the above technical solution, the proportions of WO3 and ZnO in the intermediate reinforcing layer are both 50%.

[0010] As an optional implementation form 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 application adopts the following technical solution: an air purification device comprising the above-mentioned air purification composite material, further comprising a control module, a light source module, a mounting rack and a catalyst carrier plate, the catalyst carrier plate is provided with holes allowing air flow, and the air purification composite material is attached to the surface of the catalyst carrier plate and the inner wall of the holes; the control module is electrically connected with the light source module, the light emitter of the light source module extends into the inside of the mounting rack, and the mounting rack is provided with a mounting groove adapted to the catalyst carrier plate.

[0012] As an optional implementation form of the above technical solution, the light source module comprises a heat dissipation shell, a lamp holder and a light emitter, the lamp holder is arranged in the heat dissipation shell, and the light emitter is mounted on the lamp holder.

[0013] As an optional implementation form 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 form of the above technical solution, the opposite sides of the mounting rack are both provided with mounting grooves, and the light emitter is arranged between the two mounting grooves.

[0015] As an optional implementation form of the above technical solution, the inner wall of the mounting frame is provided with a reflective protrusion, which is used for reflecting light to the catalyst carrier plate.

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

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

[0018] As an optional implementation form of the above technical solution, the light emitter is an ultraviolet lamp.

[0019] As an optional implementation form 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 5mm.

[0020] In a third aspect, the application adopts the following technical solution: an air purification system comprising the air purification device described above, further comprising a control center, the control center being connected with a sensor module, the sensor module being used to obtain environmental parameters, so that the control center instructs each control module to turn on or turn off the corresponding light source module.

[0021] The application has the following beneficial effects:

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

[0023] FIG. 1 is a structural schematic diagram of an air purification device according to an embodiment of the application;

[0024] FIG. 2 is an exploded schematic diagram of an air purification device according to an embodiment of the application;

[0025] FIG. 3 is an exploded schematic diagram of a reflective protrusion according to an embodiment of the application;

[0026] FIG. 4 is a structural schematic diagram of an air purification system according to an embodiment of the application.

[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-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. Embodiments of the present application

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

[0029] The main catalytic inner layer serves as a main catalyst, can enhance the absorption of light of a wide frequency, and realizes a visible light photocatalysis process. The intermediate reinforcing layer serves as a catalyst with direct catalysis and auxiliary catalysis functions, can enhance and control the photocatalysis process. The protective outer layer directly contacts with air, has a direct catalysis function, and can improve air friction and improve water retention capacity, and improve the air purification effect.

[0030] Specifically, the proportion of WO3 in the main catalytic inner layer is 90%, and the proportion of W 18 O 49 is 10%. The proportions of WO3 and ZnO in the intermediate reinforcing layer are both 50%. The proportion of WO3 in the protective outer layer is 50%, the proportion of the manganese-based catalyst is 20%, and the proportion of the nickel-based catalyst is 30%.

[0031] An object of the present application is to solve the problem of eliminating pathogens (bacteria and viruses), and a brand-new air purification composite material is provided, which can be impregnated into any surface, which can be a wall, a plastic base or an aluminum base, and a wide range of light frequencies from 180nm to 400nm or above, even visible light, is used for catalysis to generate hydrogen peroxide, and a small proportion of water molecules is converted into hydrogen peroxide by using a photocatalytic oxidation or a heterojunction photocatalysis process, so that the air purification function is realized.

[0032] The concentration of hydrogen peroxide produced by the present application in the air is stable (between 0.03 and 0.05 ppm), creating a completely safe and healthy environment, capable of eliminating pathogens from the air and surfaces, but maintaining a concentration far below the limit of 1 ppm established by ASHRAE, CDC and ECHA standards, which means no harm to humans or animals.

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

[0034] The air purification composite in the present application is mainly tungsten oxide, which is the main catalyst for attracting light and generating reactions. The air purification composite can form a coating on the substrate, and the coating has a multi-layer structure, each layer has different components and thickness, different functions, and different chemical compositions. Tungsten is mixed with other chemicals such as manganese, silver or nickel at 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 also affect the catalytic efficiency, as the uneven outer surface will allow higher air friction and higher water capture, as well as better hydrogen peroxide conversion efficiency on the surface of the substrate per square centimeter.

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

[0036] 1. The air purification composite of the present application does not contain titanium dioxide, it uses 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, 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 of the present application can absorb visible light due to its narrow band gap and the presence of oxygen vacancies in the material. These vacancies produce defect states that can be excited by visible light.

[0038] 3. Efficient charge separation, the air purification composite of the present application has a very high electron mobility, which can effectively separate photo-induced electron-hole pairs, thereby enhancing the photocatalytic activity, which is particularly important for applications that require long-term stability and durability, as it reduces the risk of charge recombination and photo-corrosion.

[0039] 4. Tunable properties, the air purification composite of the present application has a tunable band gap, which is adjusted by controlling the size and shape of the nanoparticles, allowing fine-tuning of the photocatalytic activity and enabling matching of the absorption spectrum to the light source.

[0040] 5. Broad spectrum response, in addition to visible light absorption, the air purification composite of the present application responds to a broad spectrum of light sources, including ultraviolet, blue, and green light, making it a versatile photocatalyst that can be used for a variety of applications that require different wavelengths of light.

[0041] 6. Improved catalytic efficiency, the air purification composite of the present application can achieve higher reaction rates and conversion efficiencies due to its high photocatalytic activity and efficient charge separation, leading to more efficient use of energy and resources in photocatalytic applications.

[0042] As shown in FIG. 1 and FIG. 2, the embodiment further provides an air purification device, comprising the air purification composite described above, further comprising a control module 1, a light source module 2, a mounting bracket 3, and a catalyst carrier plate 4, wherein the catalyst carrier plate 4 is provided with holes allowing air flow, and the air purification composite is attached to the surface of the catalyst carrier plate 4 and the inner wall of the holes; the control module 1 is electrically connected to the light source module 2, the light emitter 7 of the light source module 2 extends into the interior of the mounting bracket 3, and the mounting bracket 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 packaged in a plastic box 14, and 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, allowing remote connection and remote control of the device, and can also detect any faults of the device. The control module 1 will respond to external environmental events such as occupancy, light, carbon dioxide, or the presence of wind, so as to be able to automatically turn on or off the light emitter 7 according to the pre-configured needs. Preferably, the distance between the light emitter 7 and the catalyst carrier plate 4 is 1-2 cm, and the light emitter 7 is an ultraviolet lamp.

[0044] 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, the light emitter 7 is mounted on the lamp holder 6, and the heat dissipation housing 5 is provided with heat dissipation holes 8 and wire connection holes 9 on the surface. The lamp holder 6 carries power supply elements and the light emitter 7, so that the light emitter 7 irradiates 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. One very important aspect of the present application is that, because the catalyst used is different from the previous technology, it can catalyze in the upper limit range of ultraviolet light, such as exposing the device to natural visible light, it can also completely achieve photocatalysis. The light emitter 7 can be a single light emitter or multiple light emitters, and they can also be any kind of light emitter, including ordinary ultraviolet lamps, LED lamps, and even natural visible light.

[0045] The mounting bracket 3 is provided with mounting grooves on opposite sides, the light emitter 7 is arranged between the two mounting grooves, and catalyst carrier plates 4 are arranged in the two mounting grooves. The holes of the two catalyst carrier plates 4 form a convection. The mounting bracket 3 is made of aluminum alloy, as shown in FIG. 3, the inner wall of the mounting bracket 3 is provided with a reflection protrusion 10, which is used to reflect light to the catalyst carrier plate 4. The light emitter 7 is enclosed in an aluminum mounting bracket 3, which can accommodate the components of the light emitter 7, and can also avoid rusting, and the reflection protrusion 10 forms a special reflection surface to improve the efficiency of the oxidation process by maximizing the use of the catalytic surface. Among them, the reflection protrusion 10 is formed in the inner part of both ends of the mounting bracket 3 to form a reflection area, so as 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 application has one or more honeycomb plates, which are coated with air purification composite material on the surface, and air flows through the honeycomb plate. These honeycomb plates can have any size or shape as long as they allow air to flow through 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 1cm to maximize the irradiation rate of the light emitter 7. 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 unbroken or broken.

[0047] The air purification composite does not generate ozone and does not require special ultraviolet lamps, so the equipment does not emit harmful chemicals, and the substrate can be safely used in any wall, air purification equipment, HVAC system, etc. The application can be used alone in any duct or air handling system (unit or duct) or embedded in an air purifier or any device that can generate airflow through it. In addition, it can also be placed anywhere where sunlight can directly shine on it, but in this case its structure will have a great change from the one shown.

[0048] As shown in Figure 4, the present embodiment also provides an air purification system, comprising the air purification device described above, further comprising a control center 11, the control center 11 is connected with a sensor module 12, the sensor module 12 is used to obtain environmental parameters, so that the control center 11 instructs each control module 1 to open or close the corresponding light source module 2.

[0049] According to the design scheme of the present application, one or more light emitters 7, single or multiple control modules 1 and single or multiple sensor modules 12 can be provided. For the case of only one light emitter 7, the control center 11 can not be provided, the sensor module 12 is connected with the control module 1, and the control module 1 is used to control the light emitter 7. The placement of the light emitter 7 is that they can produce the maximum irradiation to the air purification composite, so as to produce the maximum catalytic effect of the air purification composite. The support structure 15 of the control center 11 is also shown in Figure 4, so as to have the best effect when used in the air duct or other air purifier.

[0050] The mounting bracket 3 is made of aluminum, because it has high reflectivity, which will help to increase the amount of light affecting the catalyst, minimize the shadow area, and maximize the oxidation effect. It will also make the light affect the photocatalyst at different angles, which is most ideal for energy absorption and optimal oxidation effect.

[0051] For ultraviolet and LED lamps, the optimal distance between the light emitter 7 and the catalyst carrier plate 4 is about 1 to 2 centimeters, and the catalytic effect will decrease slightly when working at a farther distance. This needs to be adjusted according to the actual situation to maximize the utilization of the air purification composite and minimize the shadow. LED lamps can be used as ordinary lamps as long as their emission frequency is within the above range, which has the best effect on the catalyst.

[0052] The light emitter 7 can be a single tube, double tube (U or H) or four tube UV lamp depending on the size and shape of the device and the power parameters required. The light emitter 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 painted on the wall and the surface decontamination of pathogens can be performed without any other light emitter 7 or any power consumption as long as there is sunlight present.

[0053] The present application provides a new air and surface pathogen and chemical decontamination technology that can be catalyzed by artificial light or natural light (sunlight), can receive UV light, oxidizes water in the air, and when water molecules are deposited on the air purification composite material, the air purification composite material converts the water molecules into hydrogen peroxide molecules using the photo-oxidation process. When the air purification composite material is on an outdoor surface, the hydrogen peroxide produced will purify the surface of the coating (wall, floor or ceiling), 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, decontaminating the air and the surfaces it comes into contact with.

[0054] In the description of the present application, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly and can be fixed connection, detachable connection, or integral; can be mechanical connection or electrical connection; can be directly connected or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application. In addition, the specific features, structures and the like described in the embodiments are included in at least one embodiment, and those skilled in the art can combine the features of different embodiments without mutual contradiction. The protection scope of the present application is not limited to the above specific embodiments, and those skilled in the art can easily think of other embodiments according to the basic technical concept of the present application without creative labor, which are also within the protection scope of the present application.

Claims

1. An air purification composite material, characterized in that: It is used to purify the air and the surface of objects, including a main catalytic inner layer, an intermediate reinforcement layer and a protective outer layer arranged in sequence. 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%, W 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%.

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

5. An air purification device, characterized in that: The air purification composite material comprises the air purification composite material according to 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 illuminant (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 emitting body (7); the lamp holder (6) is arranged in the heat dissipation housing (5), and the light emitting body (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 wire connection holes (9).

8. The air purification device according to claim 6, characterized in that Mounting grooves are provided on opposite sides of the mounting frame (3), and the luminous body (7) is arranged between the two mounting grooves; a reflective protrusion (10) is provided on the inner wall of the mounting frame (3), 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), 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 a corresponding light source module (2).

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