Circulating type air treatment device used in subway carriage

Abstract

The utility model discloses a circulating air treatment device used in a subway carriage, which comprises an airflow driving unit arranged in a heating system of the subway carriage and used for providing power for circulating airflow in the carriage; the photocatalysis unit is arranged at the corresponding position of an air inlet of the heating system and located at the front end of the airflow driving unit; and the photocatalysis unit is used for removing volatile organic pollutants in the subway carriage and sterilizing and disinfecting. The circulating type air treatment device can effectively remove organic pollutants such as benzene in the air in the carriage, and has the effects of disinfection and sterilization at the same time.

Description

Technical Field

[0001] The utility model relates to air purification equipment, in particular to a circulating air treatment device used in a subway car. Background Art

[0002] With the development of society, subways, as one of the convenient means of transportation in cities, have brought great convenience to people's lives. However, since most urban subways are built underground and are semi-enclosed or fully enclosed places, the indoor air quality of public places such as subway stations is particularly important. The bacteria content, carbon dioxide content, and harmful chemical gas content in the air of subways and subway cars are also much higher than those in other public places. Due to the high density of the population, on the one hand, the weak air circulation capacity underground will cause the increase of carbon dioxide content; on the other hand, the human body is one of the important media for the spread of bacteria. The dense population will not only accelerate the spread of germs and bacteria, but also indirectly affect the overall environmental temperature and humidity, making it easier for bacteria to breed. In addition, the human body is prone to sweating in summer, and sweat is easy to attach to public facilities. With the help of sweat, bacteria and germs will become easier to spread. In view of indicators such as benzene and bacteria content in subways, air purification systems can be used in subway cars to filter particulate matter and chemicals in the air, improve the regional environment, and achieve the purpose of environmental monitoring of subway public spaces.

[0003] The excessive concentration of volatile organic compounds such as benzene can harm human health. Air purification is not effective only through ventilation or coarse filtration and simple sterilization in crowded subway cars. Currently, there is a lack of more effective air purification methods for subway cars, and there is a lack of effective air purification solutions for benzene organic matter, bacteria, and virus pollution in subway cars.

[0004] In recent years, photocatalytic purification technology has become an environmental pollution control technology with good application prospects due to its mild reaction conditions, good stability, and thorough purification effect. Titanium dioxide (TiO2) has good photocorrosion resistance and catalytic activity, and is stable, cheap, easy to obtain, non-toxic and harmless. It is currently recognized as the best photocatalyst.

[0005] Titanium dioxide photocatalysts are usually used in powder form. In practical applications, titanium dioxide needs to be fixed on a carrier to overcome the shortcomings of suspended phase titanium dioxide photocatalysts. At present, the carrier materials mainly include glass carriers such as glass sheets, glass fiber meshes, etc., ceramic carriers such as alumina ceramic sheets, honeycomb ceramic columns, foam ceramics, etc., and metal carriers such as titanium sheets, stainless steel plates, nickel foams, etc. The usual loading method is the titanium colloid loading method or the method of adding titanium oxide grains to the binder loading method, and then sintering at high temperature to prepare a loaded photocatalyst.

[0006] In order to improve the air quality in subway cars, there is an urgent need for an air purification facility that can be embedded in the existing ventilation and filtering equipment in the subway car, especially a circulating air treatment device with an air purification unit manufactured using the principle of photocatalytic purification.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0008] The utility model aims to provide a circulating air treatment device for subway carriages, which can effectively remove organic pollutants such as benzene in the air in the carriages and has the effect of disinfection and sterilization.

[0009] To achieve the above-mentioned purpose, the utility model provides a circulating air treatment device for use in a subway car, comprising: an airflow driving unit, which is arranged in the heating system of the subway car and is used to provide power for the circulating airflow in the car; a photocatalytic unit, which is arranged at a corresponding position of the air inlet of the heating system and is located at the front end of the airflow driving unit; the photocatalytic unit is used to remove volatile organic pollutants and sterilize and disinfect in the subway car.

[0010] Furthermore, in the above technical solution, the photocatalytic unit includes: a photocatalytic plate, which is a foam ceramic plate loaded with photocatalytically active components; a plurality of ultraviolet LED light sources, which are UVA band LED light sources and are evenly distributed on the bars of the grille light board, and the grille light board is arranged parallel to the photocatalytic plate for irradiating the photocatalytic plate.

[0011] Furthermore, in the above technical solution, a fixed frame structure may be used around the photocatalytic unit; the photocatalytic plate is 15 mm to 20 mm away from the grille light board.

[0012] Furthermore, in the above technical solution, the photocatalytic units can be arranged in two rows and symmetrically in the heating system of the subway car.

[0013] Furthermore, in the above technical solution, a bellows is provided at the air inlet of the heating system, and the bellows has two openings, wherein the first opening faces the air inlet of the heating system, and the second opening is perpendicular to the first opening and faces the photocatalytic unit.

[0014] Furthermore, in the above technical solution, the photocatalytic unit can be arranged close to the heat exchanger of the heating system.

[0015] Furthermore, in the above technical solution, the airflow driving unit may use a forward-inclined centrifugal fan, the number of which is two and which are arranged in parallel at the axial symmetry center of the two rows of photocatalytic units, and the forward-inclined centrifugal fan adopts the method of air intake on both sides and air outlet at the bottom.

[0016] Furthermore, in the above technical solution, the air outlet of the forward-inclined centrifugal fan is located at the top of the subway car.

[0017] Furthermore, in the above technical solution, a negative oxygen ion unit may be provided at the air outlet of the forward-inclined centrifugal fan, and the negative oxygen ion unit adopts a passive negative oxygen ion plate with a honeycomb-shaped ceramic structure as a carrier and a mixed semiconductor material.

[0018] Furthermore, in the above technical solution, the open porosity of the foam ceramic plate can be 70% to 90%, and the pore density can be 8 to 60 ppi.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1) The circulating air handling device is installed in the existing heating system shell in the subway car, which not only saves space but also allows the air in the car to be filtered and purified more fully;

[0021] 2) The photocatalytic unit can remove benzene-based organic pollutant gases that may be present in subway cars, and can also play a role in sterilization and disinfection;

[0022] 3) Changing the existing situation that the air in the carriage is only coarsely filtered, not only the photocatalytic unit is used for full purification and filtration, but also a negative oxygen ion unit is provided at the air outlet of the fan, so that the air quality in the subway carriage is more optimized;

[0023] 4) It does not take up any space in the car and does not affect the appearance after the equipment is installed.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, and at the same time to make the above and other purposes, technical features and advantages of the utility model easier to understand, one or more preferred embodiments are listed below and described in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a three-dimensional structural schematic diagram of a circulating air treatment device used in a subway car.

[0026] Figure 2 The utility model is an exploded schematic diagram of a circulating air treatment device used in a subway car.

[0027] Figure 3 It is a schematic diagram of the photocatalytic unit in the utility model.

[0028] Figure 4 It is a cross-sectional view of the circulating air treatment device of the utility model used in a subway car (showing the direction of circulating air flow).

[0029] Description of main reference numerals:

[0030] 1-subway car heating system, 11-heating system air inlet, 12-bellows box, 13-photocatalytic unit, 130-fixing frame, 131-photocatalytic foam ceramic plate, 132-grille light board, 14-heat exchanger, 15-forward-inclined centrifugal fan. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0032] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0033] In this document, for the convenience of description, spatial relative terms such as "below", "below", "down", "above", "above", "upper", etc. may be used to describe the relationship between one element or feature and another element or feature in the accompanying drawings. It should be understood that the spatial relative terms are intended to include different orientations of the object in use or operation in addition to the orientation depicted in the figure. For example, if the object in the figure is turned over, the element described as being "below" or "below" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both below and above. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatial relative terms used in this document should be interpreted accordingly.

[0034] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable.

[0035] like Figures 1 to 4 As shown, the circulating air treatment device for subway cars of the utility model is embedded in the shell of the existing subway car heating system 1, and includes: an airflow driving unit and a photocatalytic unit 13, wherein the airflow driving unit is arranged in the middle position of the shell of the subway car heating system 1, and is used to provide power for the circulating airflow generated in the car. The photocatalytic unit 13 is arranged at the corresponding position of the air inlet of the heating system (i.e., close to the air inlet position), and the photocatalytic unit 13 is located at the front end of the airflow driving unit, and is used to remove volatile organic pollutants such as benzene in the subway car and sterilize and disinfect.

[0036] Further Figure 1 , 2 As shown, preferably but not restrictively, the airflow driving unit adopts a forward-inclined centrifugal fan 15, and the number of the forward-inclined centrifugal fans 15 is two, and they are arranged side by side in the middle of the housing of the heating system 1. The photocatalytic units 13 are symmetrically arranged in two rows relative to the forward-inclined centrifugal fans 15, that is, the forward-inclined centrifugal fans 15 are arranged at the axisymmetric center of the two rows of photocatalytic units 13 (see Figure 4 ), the forward-inclined centrifugal fan has air intake on both sides and air outlet at the bottom. Figure 1 and 2 As shown, the number of photocatalytic units in each row is preferably two. A heat exchanger 14 used in an existing heating system is located between the photocatalytic unit 13 and the forward-inclined centrifugal fan 15, and the photocatalytic unit 13 is disposed close to the heat exchanger 14 of the heating system.

[0037] Further Figure 3 As shown, the photocatalytic unit 13 includes a photocatalytic plate and a plurality of ultraviolet LED light sources. The photocatalytic plate adopts a foam ceramic plate 131 loaded with photocatalytic active components. The foam ceramic plate 131 is located at Figure 3 Below the middle grille light panel 132, the two are arranged in parallel and separated by a distance. A plurality of ultraviolet LED light sources (not shown in the figure) are evenly arranged on the bars of the grille light panel 132. The ultraviolet LED light sources preferably use UVA band LED light sources and are evenly distributed on the bars of the grille light panel. Preferably, the grille light panel 132 and the foam ceramic panel 131 are arranged in parallel and separated by 15mm to 20mm, so as to make the light source irradiate the photocatalytic panel more efficiently. The photocatalytic unit 13 is surrounded by a fixed frame structure, which can fix the grille light panel 132 and the foam ceramic panel 131 together.

[0038] In one or more exemplary embodiments of the present invention, the ultraviolet LED light source is preferably a point light source. More preferably, the wavelength of the ultraviolet LED light source is 365nm. The use of an ultraviolet LED light source in the UVA band can improve photoelectric efficiency and reduce energy loss. The wavelength of ultraviolet light emitted by the ultraviolet LED light source is 280 to 390nm, which can be a single wavelength or a mixed wavelength.

[0039] Further, the opening rate of the foam ceramic plate 131 is 70% to 90%, and the pore density is 8 to 60 ppi. Preferably, but not restrictively, the photocatalytic foam ceramic plate 131 uses a foam alumina-based carrier as an open-pore foam structure, and the photocatalyst is a foam alumina-based carrier loaded with TiO2 photocatalyst. In the photocatalyst, TiO2 grains are embedded and dispersed on the outer surface of the photocatalyst, and among the TiO2 grains on the outer surface of the photocatalyst, TiO2 grains with a particle size of 5 to 50 μm account for more than 70%.

[0040] Further Figure 4 As shown, the shell of the existing heating system 1 of the subway car is arranged on the top of the car, the air inlet 11 is located on both sides of the bottom of the shell and is symmetrically arranged, and the air outlet is located in the middle of the shell. A bellows 12 is provided at the air inlet 11 of the heating system 1, and the bellows 12 has two openings, wherein the first opening faces the air inlet 11 of the heating system 1, and the second opening is perpendicular to the first opening and faces the photocatalytic unit 13. This design allows the airflow to be relatively concentrated before entering the photocatalytic unit, and the airflow forms a gathering under the constraint of the bellows, and can vertically enter the photocatalytic unit 13 through the second opening of the bellows. After the airflow enters the photocatalytic unit, under the irradiation of the ultraviolet LED lamp on the grille light board 132, a photocatalytic reaction occurs on the foam ceramic plate 131, which can filter and purify the passing airflow, especially effectively filtering or killing the benzene organic pollutants in the subway car and the bacteria and viruses that exist in large quantities in the air due to the dense population. The purified air flowing out of the photocatalytic unit is heated up under the action of the heat exchanger 14 and sucked into the forward-inclined centrifugal fan 15. Finally, the purified and heated air is discharged from the outlet of the forward-inclined centrifugal fan 15 and returns to the subway car, forming an air flow cycle.

[0041] Preferably, but not restrictively, a negative oxygen ion unit (not shown in the figure) is provided at the air outlet of the forward-inclined centrifugal fan 15, and the negative oxygen ion unit adopts a passive negative oxygen ion plate with a honeycomb-shaped ceramic as a carrier and mixed semiconductor materials. Under the action of the circulating airflow, the concentration of negative oxygen ions in the room can be effectively increased, making the air fresher.

[0042] The circulating air treatment device of the utility model can be installed in the shell of the existing subway car heating system, and the air in the car is photocatalytically filtered and purified while the circulating airflow is heated, which does not occupy additional space in the subway car and can make the filtration and purification of the air in the car more sufficient. The photocatalytic unit in the air treatment device can perform efficient circulating purification treatment on the subway car environment. The circulating air treatment device of the utility model is used for organic pollutants such as benzene that may exist in the subway car, and has good photocatalytic degradation performance. At the same time, it can effectively kill bacteria or viruses that are bred in the car due to the large number of people gathering, and has good application prospects.

[0043] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments should fall within the scope of protection of the utility model.

Claims

1. A circulating air treatment device for use in a subway car, characterized in that: include: An airflow driving unit, which is provided in the heating system of the subway car and is used to provide power for the circulating airflow in the car; A photocatalytic unit is arranged at a corresponding position of the air inlet of the heating system and is located at the front end of the airflow driving unit; the photocatalytic unit is used to remove volatile organic pollutants and sterilize in the subway car.

2. The circulating air treatment device for use in a subway car according to claim 1, characterized in that: The photocatalytic unit comprises: A photocatalytic plate, which is a foam ceramic plate loaded with photocatalytically active components; A plurality of ultraviolet LED light sources are UVA band LED light sources and are evenly distributed on the bars of a grille light plate. The grille light plate is arranged in parallel with the photocatalytic plate and is used for irradiating the photocatalytic plate.

3. The circulating air treatment device for use in a subway car according to claim 2, characterized in that: The photocatalytic unit is surrounded by a fixed frame structure; the photocatalytic plate is 15 mm to 20 mm away from the grille light plate.

4. The circulating air treatment device for use in a subway car according to any one of claims 1 to 3, characterized in that: The photocatalytic units are arranged in two rows and symmetrically in the heating system of the subway car.

5. The circulating air treatment device for use in a subway car according to claim 4, characterized in that: A bellows is provided at the air inlet of the heating system. The bellows has two openings, wherein a first opening faces the air inlet of the heating system, and a second opening is perpendicular to the first opening and faces the photocatalytic unit.

6. The circulating air treatment device for use in a subway car according to claim 1, characterized in that: The photocatalytic unit is arranged close to the heat exchanger of the heating system.

7. The circulating air treatment device for use in a subway car according to claim 4, characterized in that: The airflow driving unit is a forward-inclined centrifugal fan. There are two forward-inclined centrifugal fans which are arranged in parallel at the axial symmetry center of the two rows of photocatalytic units. The forward-inclined centrifugal fans have air intakes on both sides and air outlets at the bottom.

8. The circulating air treatment device for use in a subway car according to claim 7, characterized in that: The air outlet of the forward-inclined centrifugal fan is located on the top of the subway car.

9. The circulating air treatment device for use in a subway car according to claim 8, characterized in that: A negative oxygen ion unit is provided at the air outlet of the forward-inclined centrifugal fan. The negative oxygen ion unit adopts a passive negative oxygen ion plate with a honeycomb-shaped ceramic as a carrier and a mixed semiconductor material.

10. The circulating air treatment device for use in a subway car according to claim 2, characterized in that: The open porosity of the foam ceramic plate is 70% to 90%, and the pore density is 8 to 60 ppi.

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