Purification device and ventilation system

Abstract

The utility model relates to the technical field of air purification, and provides a purification device and a ventilation system.The purification device comprises a supporting assembly and a foam metal piece, the foam metal piece is arranged on the supporting assembly, and a nitrogen-doped titanium dioxide layer is loaded on the surface of the foam metal piece. The nitrogen-doped titanium dioxide layer is suitable for being coupled with visible light to generate electrons and holes. According to the purification device provided by the utility model, the nitrogen-doped titanium dioxide layer is arranged on the foam metal piece, so that the limitation that a photocatalyst is applied under an ultraviolet mercury lamp in the prior art is broken through, and the popularization and the use of the purification device are facilitated. Besides, the foam metal piece contains a large number of foam air holes, the air permeability of the foam air holes is good, the contact area of airflow and the nitrogen-doped titanium dioxide layer can be increased, and the air purification effect of the nitrogen-doped titanium dioxide layer can be effectively improved; and moreover, the foam metal piece is small in density and light in weight, so that the weight of the purification device can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to a purification device and a ventilation system. Background Art

[0002] The indoor ventilation system is an important channel and medium for the spread and diffusion of pollutants such as formaldehyde and volatile organic compounds, odors, and harmful substances such as bacteria and viruses in the indoor environment. The prior art provides a purification device mainly composed of glass fibers loaded with photocatalyst, wherein the photocatalyst is a titanium dioxide water-soluble gel, and this photocatalyst generally can only produce a purification effect under the irradiation of an ultraviolet mercury lamp, resulting in great limitations in the use of the purification device and being not convenient for popularization and use. Summary of the Utility Model

[0003] The first aspect of the utility model provides a purification device to solve the defect that the photocatalyst in the prior art can only be used under an ultraviolet light source. By providing a nitrogen-doped titanium dioxide layer on a foam metal part, the limitation that the photocatalyst in the prior art can only be applied under an ultraviolet light source is broken, which is beneficial to the popularization and use of the purification device.

[0004] The second aspect of the utility model provides a purification system.

[0005] The purification device provided by the utility model includes:

[0006] A support assembly;

[0007] A foam metal part provided on the support assembly, with a nitrogen-doped titanium dioxide layer loaded on the surface of the foam metal part, and the nitrogen-doped titanium dioxide layer is adapted to couple with visible light or ultraviolet light to generate electrons and holes.

[0008] According to the purification device provided by the utility model, the support assembly includes a support part and at least one connecting piece, one end of the connecting piece is fixedly connected to the support part, and the other end is fixedly connected to the foam metal part.

[0009] According to the purification device provided by the utility model, the support part includes a support frame and a plurality of support rods, the shape of the support frame is adapted to the shape of the foam metal part, and the plurality of support rods pass through the support frame and are fixedly connected to the support frame.

[0010] According to the purification device provided by the utility model, it further includes an ultraviolet chip group provided on one side of the support rod facing the foam metal part.

[0011] According to the purification device provided by the utility model, the ultraviolet chip group includes a plurality of semiconductor ultraviolet light sources, and the plurality of semiconductor ultraviolet light sources are evenly spaced.

[0012] According to the purification device provided by the present utility model, a plurality of the semiconductor ultraviolet light sources are connected in series to the same wire.

[0013] According to the purification device provided by the present utility model, the semiconductor ultraviolet light source is a gallium nitride-based light-emitting chip.

[0014] According to the purification device provided by the present utility model, the foam metal part includes a foam nickel body.

[0015] According to the purification device provided by the present utility model, the foam metal part is a porous grid-like structure.

[0016] The purification system provided by the present utility model includes the purification device described in any one of the foregoing items.

[0017] In the purification device provided by the present utility model, a nitrogen-doped titanium dioxide layer is provided on the foam metal part. The nitrogen-doped titanium dioxide layer has good visible-light photocatalytic performance and can directly combine with visible light or ultraviolet light to generate electrons and holes. The electrons and holes can react with water and oxygen in the air to generate highly active free radicals such as hydroxyl radicals. The hydroxyl radicals can mineralize and degrade pollutants such as formaldehyde and volatile organic compounds in the air into carbon dioxide and water. In addition, under the action of the super-oxidizing power of photocatalysis, the floating bacteria in the air will have their cell membranes damaged, and the proteins of the viruses will be coagulated. In this way, the bacteria and viruses can be directly killed, thereby achieving the effects of killing bacteria, fungi, viruses, etc. and realizing the purpose of antibacterial air purification.

[0018] In addition, the foam metal part contains a large number of foam pores, and the foam pores have good air permeability, which can increase the contact area between the air flow and the nitrogen-doped titanium dioxide layer, and can effectively improve the air purification effect of the nitrogen-doped titanium dioxide layer; furthermore, the foam metal part has a small density and a light weight, which can greatly reduce the weight of the purification device. Compared with the prior art, the purification device provided by the embodiment of the present utility model, by providing a nitrogen-doped titanium dioxide layer on the foam metal part, breaks the limitation of the application of photocatalysts under ultraviolet mercury lamps in the prior art, and can improve the abilities of the purification device to kill bacteria, fungi, viruses, and mineralize and degrade pollutants such as formaldehyde and VOCs, which is beneficial to the popularization and use of the purification device. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the purification device provided by the embodiment of the present utility model.

[0021] Figure 2 It is a schematic diagram of the circuit connection of the ultraviolet chip group provided by the embodiment of the present utility model.

[0022] Reference numerals:

[0023] 100: Support assembly; 110: Support member; 111: Support frame; 112: Support rod; 120: Connecting member; 130: Ultraviolet chip group; 200: Foam metal part. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0026] In the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] Figure 1 is the overall structural schematic diagram of the purification device provided by the embodiment of the present utility model.

[0029] Referring to Figure 1 , a first aspect of the present utility model provides a purification device, which includes a support assembly 100 and a foam metal member 200. The foam metal member 200 is arranged on the support assembly 100, and a nitrogen-doped titanium dioxide layer is loaded on the surface of the foam metal member 200. Specifically, the three-dimensional porous foam metal member 200 can be placed in a titanium dioxide acid containing nitrogen with a certain concentration, soaked for 15 minutes. After the soaking is completed, the foam metal member 200 is taken out and dried, and then placed in a high temperature for three hours. In this way, a nitrogen-doped titanium dioxide layer can be attached to the foam metal member 200.

[0030] Among them, the titanium dioxide acid containing nitrogen can be obtained by the following method:

[0031] Step 1: Add a certain amount of titanium source to 1 L of water to prepare a titanium ion solution with a concentration of 0.3 - 1.5 mol / L. Then, based on the molar amount of titanium ions, add 100 - 400% of the nitrogen doping source, 0.5 - 2% of the metal doping source, 0.5 - 1.5% of the doping assistant, and 100 - 300% of the precipitant to the solution, and stir for 1 h to obtain a reaction precursor solution;

[0032] Step 2: Centrifuge and wash the precursor solution in Step 1 with deionized water 5 times to obtain a precipitate. Add deionized water to the precipitate, make up the volume to 1 L, then add 0.5 - 2% of the peptizing assistant based on the molar amount of titanium ions, and then dropwise add 1 - 3% of the peptizing agent based on the molar amount of titanium ions until a transparent sol is formed;

[0033] Step 3: Add the sol obtained in Step 2 to a sealed hydrothermal reaction kettle for crystallization reaction to obtain titanium dioxide acid.

[0034] Referring to Figure 1, It can be understood that for the purification device provided by the embodiments of the present utility model, a nitrogen-doped titanium dioxide layer is provided on the foam metal part 200. The nitrogen-doped titanium dioxide layer has good visible light photocatalytic performance and can directly combine with visible light or ultraviolet light to generate electrons and holes. The electrons and holes can react with water and oxygen in the air to generate highly reactive free radicals such as hydroxyl radicals. The hydroxyl radicals can mineralize and degrade pollutants such as formaldehyde and volatile organic compounds in the air into carbon dioxide and water. In addition, under the action of the super-oxidizing power of photocatalysis, floating bacteria in the air will have their cell membranes damaged, and the proteins of viruses will be coagulated. In this way, bacteria and viruses can be directly killed, thereby achieving the effects of killing bacteria, fungi, viruses, etc., and realizing the purpose of antibacterial air purification.

[0035] In addition, the foam metal part 200 contains a large number of foam pores, and the foam pores have good air permeability, which can increase the contact area between the air flow and the nitrogen-doped titanium dioxide layer, and can effectively improve the air purification effect of the nitrogen-doped titanium dioxide layer; moreover, the foam metal part 200 has a small density and is light in weight, which can greatly reduce the weight of the purification device. Compared with the prior art, the purification device provided by the embodiments of the present utility model breaks the limitation that photocatalysts can only be applied under ultraviolet light in the prior art, which is beneficial to the popularization and use of the purification device.

[0036] Continue to refer to Figure 1 , In an alternative embodiment of the present utility model, the support assembly 100 includes a support member 110 and at least one connecting member 120. The connecting member 120 is disposed between the support member 110 and the foam metal part 200. One end of the connecting member 120 is fixedly connected to the support member 110, and the other end is fixedly connected to the foam metal part 200. There are many ways of fixed connection. For example, the way of mutual clamping through a buckle and a card slot, or the way of connection through fasteners such as bolts and screws, and it can also be adhered by using an adhesive. In some alternative embodiments, welding can also be used. Specifically, it can be adaptively set according to the actual situation.

[0037] Refer to Figure 1 , It can be understood that by providing the support member 110 and the connecting member 120, in this way, the foam metal part 200 can have good stability. In this way, when installing and using the purification device, no additional fixing device needs to be added to the foam metal part 200, and the purification device can be directly placed at the preset installation position. In this way, the use difficulty of the purification device is reduced, which is beneficial to the popularization and use of the purification device. It should be noted that the length of the connecting member 120 is adjustable and can be adaptively adjusted according to the concentration of nitrogen-doped titanium dioxide in the nitrogen-doped titanium dioxide layer, or can also be adaptively adjusted according to the number and distribution mode of the ultraviolet chip sets 130 described later.

[0038] Continue to refer to Figure 1 In an alternative embodiment of the present utility model, the support member 110 includes a support frame 111 and a plurality of support rods 112. The shape and size of the support frame 111 are adapted to the shape and size of the foam metal member 200. As Figure 1 shown, in this embodiment, both the support frame 111 and the foam metal member 200 are regular hexagons. Under the connection of the connecting member 120, the support frame 111 and the foam metal member 200 can form an integral body with good stability; a plurality of support rods 112 are disposed through the support frame 111 and fixedly connected to the support frame 111. The plurality of support rods 112 can further improve the stability and strength of the support member 110, making the overall stability of the purification device better.

[0039] In an alternative embodiment of the present utility model, the connecting member 120, the support frame 111 and the support rods 112 can be combined differently according to the size and shape of the duct of the ventilation system to achieve full coverage of the duct cross-section. Specifically, it can be adaptively designed according to the actual situation; in addition, the connecting member 120, the support frame 111 and the support rods 112 can all be made of lightweight aluminum alloy material. In this way, the weight of the purification device can be reduced, which is beneficial to the miniaturization and portability of the device.

[0040] Continue to refer to Figure 1 In an alternative embodiment of the present utility model, the purification device further includes an ultraviolet chip group 130. The ultraviolet chip group 130 is disposed on the side of the support rod 112 facing the foam metal. It can be understood that the ultraviolet rays generated by the ultraviolet chip group 130 can directly act on the chemical bonds of organic molecules, thereby breaking the molecular structure of organic pollutants and decomposing them into harmless substances; in addition, the ultraviolet rays generated by the ultraviolet chip group 130 can effectively excite the nitrogen-doped titanium dioxide layer to generate photoelectrons and holes, which can improve the purification efficiency of the foam metal member 200.

[0041] In an alternative embodiment of the present utility model, the ultraviolet chip group 130 includes a plurality of semiconductor ultraviolet light sources. The plurality of semiconductor ultraviolet light sources are evenly spaced. The semiconductor ultraviolet light sources are small in volume, which is beneficial to the miniaturization and portability of the purification device. In addition, the semiconductor ultraviolet light sources have a long service life and high efficiency, which can reduce the maintenance cost of the purification device.

[0042] Figure 2 is a schematic circuit connection diagram of the ultraviolet chip group provided by the embodiment of the present utility model.

[0043] In an alternative embodiment of the present utility model, multiple semiconductor ultraviolet light sources are connected in series to the same wire. It can be understood that such an arrangement can, on the one hand, save the cost of circuit laying and reduce the difficulty of circuit laying; on the other hand, it can also control the turning on or off of all semiconductor ultraviolet light sources simultaneously, reducing the control difficulty.

[0044] In an alternative embodiment of the present utility model, the semiconductor ultraviolet light source can be a gallium nitride-based light-emitting chip. The gallium nitride-based light-emitting chip has a sapphire substrate. It can be understood that, under different circumstances, by regulating the energy band and doping concentration of the gallium nitride material, light sources of different ultraviolet bands can be provided to achieve the optimal ultraviolet band required for the photocatalytic effect of the nitrogen-doped titanium dioxide layer, improving the versatility of the purification device so that the purification device can be applied under a wider range of working conditions. In addition, the gallium nitride-based light-emitting chip does not use mercury and has ultra-low energy consumption, which is a rigid replacement for traditional mercury lamp ultraviolet, beneficial to environmental protection.

[0045] In an alternative embodiment of the present utility model, the semiconductor ultraviolet light source can also be a silicon-based semiconductor, a phosphide-based light-emitting material, or some nanomaterials, such as nanometer titanium dioxide, nanometer zinc oxide, etc. as the semiconductor ultraviolet light source. Specifically, it can be adaptively selected according to the actual situation.

[0046] In an alternative embodiment of the present utility model, the foam metal part 200 includes a foam nickel body. It can be understood that foam nickel can not only increase the contact area between the air flow and the nitrogen-doped titanium dioxide layer through a large number of foam pores, but also has a certain purification effect itself, which can further improve the air purification effect of the purification device.

[0047] Continue to refer to Figure 1 , in an alternative embodiment of the present utility model, the foam metal part 200 has a porous grid-like structure. It can be understood that such a structure can maximize the use of space, increase the contact area between the foam metal part 200 and the air flow, and improve the air purification effect of the purification device.

[0048] The following gives the experimental results of the purification device provided by the embodiment of the present utility model under actual use conditions:

[0049] The wind speed attenuation of the purification device is 31.34%, the single-pass purification rate is 77.15%. Under ultraviolet light illumination conditions, the disinfection rate of typical pathogenic bacteria is greater than 99%, the mildew-proof grade is 0, and the service life (scrub resistance times) of the nitrogen-doped titanium dioxide layer exceeds 3000 times. It can be seen from the experimental results that the purification device provided by the embodiment of the present utility model has a significant air purification effect, a long service life, and good versatility and popularization.

[0050] The second aspect of the present utility model provides a ventilation system. The ventilation system includes the purification device described in any one of the foregoing embodiments. Since the ventilation system provided in this embodiment includes the purification device described in any one of the foregoing embodiments, the ventilation system also has the beneficial effects of the purification device described in any one of the foregoing embodiments. For specific beneficial effects, please refer to the foregoing description and will not be elaborated herein again.

[0051] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for combination is that those of ordinary skill in the art can implement it; when the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist, that is, it does not fall within the protection scope of the present utility model either.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A purification device, characterized in that: include: Support assembly (100); The foam metal piece (200) is arranged on the support assembly (100), and the surface of the foam metal piece (200) is loaded with a nitrogen-doped titanium dioxide layer, and the nitrogen-doped titanium dioxide layer is suitable for coupling with visible light or ultraviolet light to generate electrons and holes.

2. The purification device according to claim 1, characterized in that: The support assembly (100) comprises a support component (110) and at least one connecting member (120), wherein one end of the connecting member (120) is fixedly connected to the support component (110), and the other end of the connecting member (120) is fixedly connected to the foam metal member (200).

3. The purification device according to claim 2, characterized in that: The support component (110) comprises a support frame (111) and a plurality of support rods (112); the shape of the support frame (111) is compatible with the shape of the foam metal part (200); the plurality of support rods (112) are inserted into the support frame (111) and fixedly connected to the support frame (111).

4. The purification device according to claim 3, characterized in that: It also includes an ultraviolet chip group (130), wherein the ultraviolet chip group (130) is arranged on a side of the support rod (112) facing the foam metal part (200).

5. The purification device according to claim 4, characterized in that: The ultraviolet chip group (130) comprises a plurality of semiconductor ultraviolet light sources, and the plurality of semiconductor ultraviolet light sources are evenly spaced.

6. The purification device according to claim 5, characterized in that: A plurality of semiconductor ultraviolet light sources are connected in series to the same wire.

7. The purification device according to claim 5, characterized in that: The semiconductor ultraviolet light source is a gallium nitride-based light-emitting chip.

8. The purification device according to any one of claims 1 to 7, characterized in that: The foam metal piece (200) comprises a foam nickel body.

9. The purification device according to any one of claims 1 to 7, characterized in that: The foam metal piece (200) is a porous grid structure.

10. A ventilation system, characterized in that: A purification device comprising any one of claims 1 to 9.

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