An air-purifying street lamp

Abstract

The present invention discloses an air purification street lamp, which includes an air inlet grille. A wind outlet grille is arranged at the top of the air inlet grille, and a lighting unit is arranged at the top of the wind outlet grille. A plurality of air purification units are arranged inside the air inlet grille, and an axial flow fan is arranged inside the wind outlet grille. The air purification unit includes a housing. A diversion chamber is arranged at the top of the housing, and an air outlet is arranged at the top of the diversion chamber; a particulate matter filtering filter screen and a gas purification filter screen are arranged inside the housing. By arranging a plurality of independent air purification units, the present invention enables pollutants to come into contact with the catalytic material more fully, has a high purification efficiency, a low filter screen pressure drop, a long service life, a simple overall structure, flexible assembly, and a wide application range.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and specifically to an air purification street lamp. Background Art

[0002] The problem of urban air pollution has attracted more and more attention. To solve the problem of air pollution, it is of great significance to carry air purification technology on urban infrastructure and develop new air purification street lamps to improve the air quality in the area for the proactive treatment of urban air pollution.

[0003] The air purification street lamp disclosed in the invention patent CN107687604A realizes electrostatic adsorption and dust removal of the air in the city by setting high-voltage positive and negative electrode plates in the street lamp, and flushes the adsorbed dust through a rainwater collection system to improve the purification efficiency. However, the design of this air purification street lamp only purifies particulate matter in the air and has no purification effect on gaseous pollutants. Its high-voltage electrostatic adsorption technology limits the device cost and application range, and cannot meet the air purification requirements of different pollution environments.

[0004] The utility model patent CN206191482U discloses a small purification device that combines air purification and outdoor lighting, and realizes the deep purification of air pollutants by combining particulate filtration and photocatalytic oxidation technology. However, the photocatalytic device adopted by this device needs to set multiple layers of LED light sources and quartz tubes or filter cartridges filled with photocatalytic materials at the same time. Limited by the technical problem that photocatalysis requires additional light sources, the structure of this device is relatively complex, not easy to replace, and has a high cost. At the same time, due to the limited contact between the polluted air flow and the catalyst, the utilization rate of the photocatalytic material is low and the overall air purification effect is limited.

[0005] It can be seen that the air purification street lamp devices integrating high-voltage electrostatic and photocatalytic oxidation technologies commonly used in the prior art have technical problems such as low air purification efficiency, high technical cost, complex device, and inability to be flexibly assembled according to different pollution situations in different public places. Summary of the Invention

[0006] To overcome the technical problems of the existing air purification street lamps, the purpose of the present invention is to provide an air purification street lamp with high purification efficiency, long service life, simple overall structure, flexible assembly, and wide application range.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0008] An air purification street lamp, comprising an air inlet grille, an air outlet grille is arranged at the top of the air inlet grille, a lighting unit is arranged at the top of the air outlet grille, a plurality of air purification units are arranged inside the air inlet grille, an axial flow fan is arranged inside the air outlet grille, the air purification unit includes a housing, a diversion chamber is arranged at the top of the housing, and an air outlet is arranged at the top of the diversion chamber; a particulate matter filtration filter screen and a gas purification filter screen for removing NO x , O3 and VOCs are arranged inside the housing.

[0009] Furthermore, a lamp shade is arranged at the top of the air outlet grille, and the lighting unit is arranged inside the lamp shade.

[0010] Furthermore, the street lamp further includes a fixed base, an outer shell bracket and a fixed bracket are arranged on the fixed base, the air inlet grille is arranged on the outer shell bracket, and a plurality of air purification units are arranged on the fixed bracket.

[0011] Furthermore, a fan bracket is arranged at the top of a plurality of air purification units, and the axial flow fan is arranged on the fan bracket.

[0012] Furthermore, the gas purification filter screen and the particulate matter filtration filter screen are provided with central openings, a diversion pipe is arranged inside the openings, and the diversion pipe is communicated with the diversion chamber.

[0013] Furthermore, the height of the diversion pipe is the same as that of the housing; the diversion chamber is a hollow structure.

[0014] Furthermore, a plurality of horizontal fixing brackets are uniformly arranged in the circumferential direction of the diversion pipe, one end of the horizontal fixing bracket is connected with the diversion pipe, and the other end is connected with the housing; a plurality of vertical fixing brackets are arranged at the top of the diversion pipe, and the air outlet is arranged at the top of the vertical fixing bracket.

[0015] Furthermore, an air inlet is arranged at the bottom of the particulate matter filtration filter screen.

[0016] Furthermore, a direction-adjustable louver is installed on the air outlet grille, and the air inlet grille is a hollow porous structure; the particulate matter filtration filter screen is a medium-efficiency or high-efficiency filter; the gas purification filter screen is filled with activated carbon or alumina particles modified by alkali solution and loaded with MnO x Loaded.

[0017] Furthermore, the activated carbon or alumina particles modified by alkali solution and loaded with MnO x are prepared through the following process: dispersing the activated carbon or alumina particles loaded with MnO x in an alkali solution, impregnating for 10-60 minutes and then drying at room temperature, wherein the alkali solution is an aqueous solution of NH3∙H2O with a mass concentration of 5%-30% or a NaOH solution with a concentration of 0.1-2 mol / L; the mass content of the loaded MnO x is 10%-35%, and the mass content of the loaded MnO xThe mass fraction of the loaded activated carbon or alumina particles in the lye is 10% - 50%.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] An air purification street lamp provided by the present invention adopts a stacking connection method of freely assembling several independent air purification units, with high air purification efficiency, a simple overall structure, long service lives of the gas purification filter screen and the particulate matter filter screen, and can meet the air purification requirements of different polluted environments. The air purification unit combines physical filtration, normal temperature catalysis and chemical absorption technologies. The lower particulate matter filter screen is used for efficiently removing particulate matter in ambient air and can be cleaned and reused. The gas purification filter screen arranged on the upper layer deeply purifies and filters gaseous pollutants such as NO x , O3, VOCs, etc. after the particulate matter is removed. The design of the two-layer filter screen makes the service life of the catalyst longer and the purification efficiency higher.

[0020] Furthermore, the multi-level assembly method makes the pressure loss of the filter screen of each air purification unit smaller, the contact between the polluted gas and the catalytic material more sufficient, and the overall air purification efficiency higher. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a structural diagram of a single air purification unit of the present invention;

[0023] Figure 3 is a schematic diagram of the connection method of the air outlet, the housing and the diversion pipe in a single air purification unit of the present invention;

[0024] Figure 4 is a cross-sectional structural diagram of a single air purification unit of the present invention;

[0025] Figure 5 is a schematic diagram of the purification principle of the air purification unit of the present invention.

[0026] Wherein: 1 - lighting unit, 2 - lamp shade, 3 - air outlet grille, 4 - axial flow fan, 5 - fan support, 6 - air inlet grille, 7 - air purification unit, 8 - fixing bracket, 9 - housing bracket, 10 - fixing base, 11 - air outlet, 12 - diversion chamber, 13 - diversion pipe, 14 - vertical fixing frame, 15 - horizontal fixing frame, 16 - housing, 17 - air inlet, 18 - gas purification filter screen, 19 - particulate matter filter screen. Detailed Embodiments

[0027] The present invention will be described in detail below with reference to the drawings.

[0028] AsFigures 1-5 , an air purification street lamp of the present invention includes: a fixed base 10, an axial flow fan 4, and a fixed bracket 8. An outer shell bracket 9 and a fixed bracket 8 are provided on the fixed base 10. An air inlet grille 6 is provided on the outer shell bracket 9. An air outlet grille 3 is provided at the top of the air inlet grille 6. A lamp shade 2 is provided at the top of the air outlet grille 3. A lighting unit 1 is provided inside the lamp shade 2. A plurality of air purification units 7 are provided on the fixed bracket 8. The plurality of air purification units 7 are located inside the air inlet grille 6. A fan bracket 5 is provided at the top of the plurality of air purification units 7. An axial flow fan 4 is provided on the fan bracket 5. The axial flow fan 4 is located inside the air outlet grille 3.

[0029] The air purification units 7 in the present invention are preferably 1 to 10 in number, and the plurality of air purification units 7 are stacked and assembled on the fixed bracket 8.

[0030] See Figure 2 and Figure 3 , a single air purification unit 7 includes a housing 16. A diversion chamber 12 is provided at the top of the housing 16. An air outlet 11 is provided at the top of the diversion chamber 12. A gas purification filter screen 18 and a particulate matter filter screen 19 are provided inside the housing 16. The gas purification filter screen 18 is located on the particulate matter filter screen 19. The gas purification filter screen 18 and the particulate matter filter screen 19 are provided with central openings, and a diversion pipe 13 is provided in the openings. The diversion pipe 13 is the same height as the housing 16, and the diversion pipe 13 is communicated with the diversion chamber 12. The diversion chamber 12 is a frustum-shaped hollow structure. The upper part of the diversion chamber 12 is hermetically connected to the bottom of the air outlet 11, and the lower part of the diversion chamber 12 is hermetically connected to the top of the housing 16. A plurality of horizontal fixing frames 15 are uniformly arranged in the circumferential direction of the diversion pipe 13. One end of the horizontal fixing frame 15 is connected to the diversion pipe 13, and the other end is connected to the housing 16. A plurality of vertical fixing frames 14 are provided at the top of the diversion pipe 13. The air outlet 11 is provided at the top of the vertical fixing frames 14. The diversion pipe 13 is suspended and fixed directly below the air outlet 11 through the vertical fixing frames 14 and the horizontal fixing frames 15.

[0031] The gas purification filter screen 18 and the particulate matter filter screen 19 are detachable, and an air inlet 17 is provided at the bottom of the particulate matter filter screen 19.

[0032] See Figure 5 , when there are multiple air purification units 7, the following method can be specifically used for stacking and assembling: the top of the air outlet 11 of the lower air purification unit is threadedly assembled and connected to the bottom of the diversion pipe 13 of the upper air purification unit, and the bottom of the diversion pipe 13 of the air purification unit 7 placed at the bottom layer is connected to the top end of the fixed bracket 8; an air flow channel is formed between the air inlet 17, the particulate matter filter screen 19, the gas purification filter screen 18, the diversion chamber 12, the air outlet 11 of the lower air purification unit 7 and the diversion pipe 13 of the upper air purification unit 7.

[0033] Further, the axial flow fan 4 is located at the center of the air outlet grille 3, and the air purification unit 7 is located at the center of the air inlet grille 6. The air outlet grille 3 and the air inlet grille 6 form the street lamp housing. The air outlet grille 3 is equipped with adjustable louvers, and the air inlet grille 6 is a hollow porous structure.

[0034] The particulate filter screen 19 is a washable medium - or high - efficiency filter, and the gas purification filter screen 18 is filled with activated carbon or alumina particles modified with alkali solution and MnO x supported activated carbon or alumina particles modified with alkali solution and MnO x supported activated carbon or alumina particles are prepared through the following process: Disperse MnO x supported activated carbon or alumina particles in the alkali solution, impregnate for 10 - 60 minutes and then dry at room temperature. Among them, the alkali solution is an aqueous solution of NH3∙H2O with a mass concentration of 5% - 30% or a NaOH solution with a concentration of 0.1 - 2 mol / L. The mass content of MnO x supported is 10% - 35%, and the mass fraction of MnO x supported activated carbon or alumina particles in the alkali solution is 10% - 50%.

[0035] See Figure 4 and Figure 5 , A purification method for an air - purifying street lamp is as follows: Driven by the axial flow fan 4, the polluted air in the environment enters from the air inlet 17 at the bottom of the air purification unit 7 after being preliminarily filtered by the air inlet grille 6 to remove larger particulate matters, and successively passes through the particulate filter screen 19 and the gas purification filter screen 18 to filter out fine particulate matters and gaseous pollutants such as NO x , O3, and VOCs. After that, the clean air enters the air outlet 11 through the diversion chamber 12 and merges into the diversion pipe 13 of the upper - layer air purification unit 7 or enters the axial flow fan 4, and is discharged directionally by adjusting the louver angle of the air outlet grille 3.

[0036] The single air - purification unit assembled by stacking multiple independent air - purification units in the present invention integrates particulate filtration, normal - temperature catalytic oxidation, and chemical absorption technologies. Two layers of filter screens are arranged in the housing. The lower layer is a particulate - filtration layer for filtering fine particulate matters in the ambient air after preliminary filtration by the air inlet grille. This filter can be washed and reused. The upper layer is a gas - purification layer, which adopts normal - temperature catalysis and chemical adsorption technologies to deeply purify gaseous pollutants such as NO x , O3, and VOCs in the air. This air - purifying street lamp adopts a multi - level stacking and assembling design, which makes the pollutants contact the catalytic materials more fully, has high purification efficiency, low filter - screen pressure drop, long service life, simple overall structure, flexible assembly, and wide application range.

Claims

1. An air purification street lamp, characterized in that, It includes an air inlet grille (6), an air outlet grille (3) is arranged at the top of the air inlet grille (6), a lighting unit (1) is arranged at the top of the air outlet grille (3), a plurality of air purification units (7) are arranged inside the air inlet grille (6), an axial flow fan (4) is arranged inside the air outlet grille (3), the air purification unit (7) includes a housing (16), a diversion chamber (12) is arranged at the top of the housing (16), and an air outlet (11) is arranged at the top of the diversion chamber (12); a particulate matter filter screen (19) and a gas purification filter screen (18) for removing NO x , O3 and VOCs are arranged inside the housing (16). The street lamp further includes a fixed base (10), an outer shell bracket (9) and a fixed bracket (8) are arranged on the fixed base (10), the air inlet grille (6) is arranged on the outer shell bracket (9), and a plurality of air purification units (7) are stacked and assembled on the fixed bracket (8); The central openings of the gas purification filter screen (18) and the particulate matter filter screen (19) are provided with a diversion pipe (13) inside the holes, and the diversion pipe (13) communicates with the diversion chamber (12); The diversion chamber (12) is a hollow structure; The bottom of the particulate matter filter screen (19) is provided with an air inlet (17); The number of the air purification units (7) is 1 to 10.

2. The air purification street lamp according to claim 1, characterized in that, A lamp shade (2) is arranged at the top of the air outlet grille (3), and the lighting unit (1) is arranged inside the lamp shade (2).

3. The air purification street lamp according to claim 1, characterized in that, A fan support (5) is arranged at the top of a plurality of air purification units (7), and the axial flow fan (4) is arranged on the fan support (5).

4. The air purification street lamp according to claim 1, characterized in that, The height of the diversion pipe (13) is the same as that of the housing (16).

5. The air purification street lamp according to claim 1, wherein, A plurality of horizontal fixing frames (15) are uniformly arranged in the circumferential direction of the diversion pipe (13). One end of the horizontal fixing frame (15) is connected to the diversion pipe (13), and the other end is connected to the housing (16). A plurality of vertical fixing frames (14) are arranged at the top of the diversion pipe (13), and the air outlet (11) is arranged at the top of the vertical fixing frame (14).

6. The air purification street lamp according to claim 1, characterized in that, An air outlet grille (3) is provided with louvers with adjustable directions, and an air inlet grille (6) is a hollow porous structure; the particulate matter filtering filter screen (19) is a medium-efficiency or high-efficiency filter; the gas purification filter screen (18) is filled with activated carbon or alumina particles modified with alkali solution and loaded with MnO x 2 7. The air purification street lamp according to claim 1, characterized in that, MnO modified by alkali solution x The supported activated carbon or alumina particles are prepared by the following process: Disperse the MnO x supported activated carbon or alumina particles in an alkali solution, impregnate for 10 - 60 minutes and then dry at room temperature. Among them, the alkali solution is an aqueous solution of NH₃∙H₂O with a mass concentration of 5% - 30% or a NaOH solution with a concentration of 0.1 - 2 mol / L; the mass content of the supported MnO x is 10% - 35%, and the mass fraction of the supported activated carbon or alumina particles of MnO x in the alkali solution is 10% - 50%.

Images