Urban air purifier

Abstract

The invention belongs to the technical field of air purification, and discloses an urban air purifier which comprises a shell, a connecting block is fixedly mounted at the top of the shell, a top plate is fixedly mounted at the top of the connecting block, and protective nets are annularly and fixedly mounted at the bottom of the top plate at equal angles. By arranging the air inlet pipe, the guide ring, the exhaust pipe and the like, the purpose of good air purification effect is achieved, air enters the air inlet pipe and is exhausted upwards from water at the bottom of the interior of the shell under the guide of the guide ring, and when the air is injected into the water, the auger is driven by the fixing shaft to rotate, so that the air purification effect is improved. The packing auger is arranged in the shell, air in water is stirred in the rotating process of the packing auger, so that the air is fully mixed with the water in the shell, as sulfur dioxide is contained in automobile exhaust and dissolved in the water, the effect of purifying the sulfur dioxide in the air is better, and the purpose of good air purification effect is achieved.

Description

Technical Field

[0001] This invention belongs to the field of air purification technology, specifically an urban air purifier. Background Technology

[0002] Automobile exhaust is the waste gas produced during vehicle use, containing hundreds of different compounds, including pollutants such as particulate matter, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, and sulfur oxides. While directly harming human health, exhaust fumes also have a profound impact on the environment. Sulfur dioxide in exhaust fumes has a strong, pungent odor and, at certain concentrations, can easily lead to acid rain, causing soil and water acidification and affecting the growth of crops and forests. This invention targets the filtration of particulate matter and sulfur dioxide in automobile exhaust fumes.

[0003] As people's living standards gradually improve, cars have become an indispensable means of transportation. With the increasing number of cars, vehicle exhaust has a serious impact on urban air quality. Due to the large urban population and concentrated residential areas, the exhaust fumes contain a large amount of harmful gases, resulting in a high concentration of harmful gases in the urban air. Inhaling these gases will affect health. Currently, most urban air purification devices use water trucks to spray water mist into the air to purify the urban air. However, since water trucks need to be constantly refilled with water, the efficiency of urban air purification is reduced. At the same time, the water trucks generate exhaust fumes during the water spraying process, thus increasing exhaust emissions. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an urban air purifier. By starting a motor and a water pump, the motor drives an impeller to rotate, drawing in external air into the casing. Guided by a guide ring, the air enters the air intake pipe and is discharged upwards from the water at the bottom of the casing. When air is injected into the water, a fixed shaft drives an auger to rotate, agitating the air in the water and ensuring thorough mixing between the air and the water inside the casing. Since automobile exhaust contains sulfur dioxide, which is soluble in water, this purifier offers the advantage of excellent air purification.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an urban air purifier, comprising a shell, a connecting block fixedly installed on the top of the shell, a top plate fixedly installed on the top of the connecting block, a protective net fixedly installed at an equal angle around the bottom of the top plate, a purification component fixedly installed inside the shell, a power component fixedly installed inside the purification component, a water inlet component fixedly installed on the top of the purification component, and a drainage component movably installed on the bottom of the power component.

[0006] Preferably, the purification component includes a guide ring, the outer shell is fixedly installed with the guide ring, a fixing plate is fixedly installed at the bottom of the guide ring, an exhaust pipe is fixedly installed at the top of the fixing plate at an equal angle, an air inlet pipe is fixedly installed at the outside of the guide ring at an equal angle, a dispersion port is fixedly installed at the bottom of the air inlet pipe, and a dustproof net is fixedly installed inside the exhaust pipe.

[0007] Preferably, the power assembly includes a fixed frame, which is fixedly installed inside the guide ring. A motor is fixedly installed inside the fixed frame, an impeller is fixedly installed at the bottom of the motor, a fixed shaft is fixedly installed at the bottom of the impeller, and an auger is fixedly installed outside the fixed shaft.

[0008] Preferably, the drainage assembly includes a drive wheel, the top of which is fixedly connected to the bottom of a fixed shaft in the power assembly. A scraper is fixedly installed at equal angles on the outer side of the drive wheel, and a mesh plate is fixedly installed at equal angles on the top of the drive wheel. A limit plate is fixedly installed inside the outer shell, a first spring is fixedly installed at equal angles on the inner wall of the outer shell, a baffle is hinged at equal angles on the inner wall of the outer shell, a fixing block is fixedly installed at equal angles on the inner side of the outer wall of the outer shell, a second spring is fixedly installed on one side of the fixing block, and a sealing block is fixedly installed on one side of the second spring.

[0009] Preferably, the water inlet assembly includes a water pump, a second water inlet pipe is fixedly installed on one side of the water pump, a first water inlet pipe is fixedly installed on the top of the water pump, an annular pipe is fixedly installed inside the guide ring, and a mist nozzle is fixedly installed at an equal angle on the inner side of the annular pipe.

[0010] Preferably, the top of the air intake pipe is connected to the inside of the guide ring, the bottom of the inside of the outer shell is filled with water, the inner diameter of the dispersion port gradually increases from top to bottom, the outside of the dispersion port is located underwater, the bottom of the exhaust pipe is fixedly inserted through the top of the fixing plate, and the top of the exhaust pipe is connected to the outside of the outer shell.

[0011] Preferably, the transmission wheel is cam-shaped, the transmission wheel has a hollow structure, the interior of the transmission wheel is filled with limestone, and the top of the transmission wheel is fixedly connected to the bottom of the fixed shaft in the power assembly.

[0012] Preferably, the inner wall of the outer shell is provided with an arc-shaped groove at equal angles, the arc-shaped groove is adapted to the baffle, and the curvature of the baffle is consistent with the curvature of the inner side of the outer shell.

[0013] Preferably, the spring force coefficient of the first spring is greater than that of the second spring, one side of the baffle is in contact with the outside of the transmission wheel, the top of the baffle is in contact with the bottom of the limiting plate, and the bottom of the limiting plate is located at the top of the transmission wheel.

[0014] Preferably, the upper end of the guide ring is funnel-shaped, the annular tube is fixedly installed on the inner wall of the guide ring, and the mist nozzle is tilted at a 45-degree angle.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves excellent air purification by incorporating an air intake pipe, a guide ring, and an exhaust pipe. By starting the motor and water pump, the motor drives the impeller to rotate, drawing in external air into the casing. Guided by the guide ring, the air enters the air intake pipe and exits upwards from the water at the bottom of the casing. As air is injected into the water, a fixed shaft drives an auger to rotate, agitating the air in the water and ensuring thorough mixing. Since automobile exhaust contains sulfur dioxide, which dissolves in water, this process further enhances the purification of sulfur dioxide in the air, thus achieving excellent air purification. This invention achieves the purpose of water purification and replacement by incorporating a transmission wheel, a limiting plate, and a baffle. During the rotation of the transmission wheel, the protrusion of the transmission wheel rotates to the bottom of the limiting plate, forming a sealed space between the transmission wheel, the baffle, and the limiting plate. As the transmission wheel continues to rotate, it compresses the water in the sealed space. Simultaneously, because the elastic coefficient of the second spring is less than that of the first spring, the water inside the outer shell is pushed by the compression of the transmission wheel, pushing the sealing block and compressing the second spring, thereby discharging the water inside the outer shell. This maintains a stable water level inside the outer shell and improves the air purification effect by replacing the water inside the outer shell, thus achieving the purpose of water purification and replacement. This invention achieves multiple air purification by incorporating an annular pipe, mist nozzles, and a first water inlet pipe. When air containing exhaust gases passes through the guide ring, a water pump is activated to inject water into the annular pipe through the first water inlet pipe. Simultaneously, the water is sprayed out through the mist nozzles. Because the mist nozzles are tilted downwards at a 45-degree angle, the sprayed water mist forms a water curtain. As the air containing exhaust gases passes through the water curtain, the harmful gases in the air undergo initial purification. The air that has undergone initial purification enters the bottom of the outer casing and undergoes multiple purifications through water, thus achieving the effect of multiple air purification. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance of the structure of the present invention; Figure 2This is a front cross-sectional view of the structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the purification component of the present invention; Figure 4 The structure of this invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the appearance of the purification component of the present invention; Figure 6 This is a schematic diagram of the external appearance of the transmission wheel of the present invention; Figure 7 This is a schematic diagram of the assembly of the transmission wheel and the outer shell of the present invention; Figure 8 The structure of this invention Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of the first spring and the baffle in the structure of the present invention; Figure 10 This is a schematic diagram of the assembly of the protective netting structure of the present invention.

[0017] In the diagram: 1. Outer shell; 2. Protective net; 3. Top plate; 4. Water inlet assembly; 401. Water pump; 402. First water inlet pipe; 403. Second water inlet pipe; 404. Annular pipe; 405. Mist nozzle; 5. Power assembly; 501. Motor; 502. Fixed shaft; 503. Fixed frame; 504. Impeller; 505. Screwdriver; 6. Purification assembly; 601. Guide ring; 602. Air inlet pipe; 603. Exhaust pipe; 604. Dustproof net; 605. Fixed plate; 606. Dispersion port; 7. Drainage assembly; 701. Limiting plate; 702. Transmission wheel; 703. Scraper; 704. Mesh plate; 705. First spring; 706. Baffle; 707. Second spring; 708. Sealing block; 709. Fixed block; 8. Connecting block. Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 10As shown, the present invention provides an urban air purifier, including a shell 1, a connecting block 8 fixedly installed on the top of the shell 1, a top plate 3 fixedly installed on the top of the connecting block 8, a protective net 2 fixedly installed at an equal angle around the bottom of the top plate 3, a purification component 6 fixedly installed inside the shell 1, a power component 5 fixedly installed inside the purification component 6, a water inlet component 4 fixedly installed on the top of the purification component 6, and a drainage component 7 movably installed on the bottom of the power component 5.

[0020] The above solution involves installing the purification device in the green belt of the city road and filling the interior of the outer shell 1 with water. By activating the power component 5 and the water inlet component 4, the power component 5 draws in air from the outside. During the intake process, the protective net 2 filters the fallen leaves and weeds from the outside. The air enters the interior of the outer shell 1 and, guided by the purification component 6, passes through the interior of the water inlet component 4. The water inlet component 4 sprays water mist to form a water curtain, which performs the initial purification of the air as it passes through. Then, water is injected through the purification component 6, allowing the water and air to come into full contact, dissolving the sulfur dioxide in the air in the water. The purified air is then discharged, and the water sprayed by the water inlet component 4 collects at the bottom of the interior of the outer shell 1. The water inside the outer shell 1 is then discharged through the rotation of the drainage component 7, thus keeping the water level inside the outer shell 1 stable.

[0021] like Figure 2 , Figure 3 , Figure 5 As shown, the purification component 6 includes a guide ring 601, the outer shell 1 is fixedly installed with the guide ring 601, a fixing plate 605 is fixedly installed at the bottom of the guide ring 601, an exhaust pipe 603 is fixedly installed at the top of the fixing plate 605 at equal angles, an air inlet pipe 602 is fixedly installed at equal angles on the outside of the guide ring 601, a dispersion port 606 is fixedly installed at the bottom of the air inlet pipe 602, and a dustproof net 604 is fixedly installed inside the exhaust pipe 603. The power assembly 5 includes a mounting bracket 503, which is fixedly installed inside the guide ring 601. A motor 501 is fixedly installed inside the mounting bracket 503. An impeller 504 is fixedly installed at the bottom of the motor 501. A fixed shaft 502 is fixedly installed at the bottom of the impeller 504. An auger 505 is fixedly installed outside the fixed shaft 502.

[0022] The above scheme is adopted as follows: by starting the motor 501 and the water pump 401, the motor 501 will drive the impeller 504 to rotate. During the rotation, external air is drawn into the interior of the outer casing 1. Under the guidance of the guide ring 601, the air enters the interior of the air intake pipe 602 and is discharged upward from the water at the bottom of the interior of the outer casing 1. When the air is injected into the water through the dispersion port 606, the fixed shaft 502 drives the auger 505 to rotate. During the rotation of the auger 505, the air in the water is agitated. Since automobile exhaust contains sulfur dioxide, and sulfur dioxide is soluble in water, the agitation process makes the air and the water inside the outer casing 1 fully mixed, thereby improving the purification effect of sulfur dioxide in the air and increasing the purification efficiency.

[0023] like Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the drainage assembly 7 includes a drive wheel 702, the top of which is fixedly connected to the bottom of the fixed shaft 502 in the power assembly 5. A scraper 703 is fixedly mounted at equal angles on the outer side of the drive wheel 702, and a mesh plate 704 is fixedly mounted at equal angles on the top of the drive wheel 702. A limit plate 701 is fixedly mounted inside the outer casing 1, a first spring 705 is fixedly mounted at equal angles on the inner wall of the outer casing 1, a baffle 706 is hinged at equal angles on the inner wall of the outer casing 1, and a fixing block 709 is fixedly mounted at equal angles on the inner side of the outer wall of the outer casing 1. A second spring 707 is fixedly installed on one side of the fixed block 709, and a sealing block 708 is fixedly installed on one side of the second spring 707. An arc-shaped groove is formed on the inner wall of the outer shell 1 at equal angles. The arc-shaped groove is adapted to the baffle 706. The curvature of the baffle 706 is consistent with the curvature of the inner side of the outer shell 1. The elastic coefficient of the first spring 705 is greater than that of the second spring 707. One side of the baffle 706 is in contact with the outside of the transmission wheel 702. The top of the baffle 706 is in contact with the bottom of the limiting plate 701. The bottom of the limiting plate 701 is located at the top of the transmission wheel 702.

[0024] The above solution involves rotating a fixed shaft 502 via a motor 501, which in turn drives a transmission wheel 702. During the rotation of the transmission wheel 702, the protrusion on the transmission wheel 702 rotates to the bottom of the limiting plate 701, creating a sealed space between the transmission wheel 702, the baffle 706, and the limiting plate 701. The continuous rotation of the transmission wheel 702 compresses the water in the sealed space. Simultaneously, because the elastic coefficient of the second spring 707 is less than that of the first spring 705, the water inside the outer casing 1... Under the pressure of the drive wheel 702, the water pushes the sealing block 708 and compresses the second spring 707, thus discharging the water inside the outer casing 1. After discharge, the protrusion of the drive wheel 702 will squeeze the baffle 706 and the first spring 705. The baffle 706 will be engaged inside the arc-shaped groove. The drive wheel 702 will continue to rotate, continuously discharging the water inside the outer casing 1, thereby maintaining a stable water level inside the outer casing 1 and replacing the water inside the outer casing 1 to improve the air purification effect.

[0025] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the water inlet assembly 4 includes a water pump 401, a second water inlet pipe 403 fixedly installed on one side of the water pump 401, a first water inlet pipe 402 fixedly installed on the top of the water pump 401, an annular pipe 404 fixedly installed inside the guide ring 601, and a mist nozzle 405 fixedly installed at equal angles on the inner side of the annular pipe 404. The top of the air intake pipe 602 is connected to the inside of the guide ring 601. The bottom of the inside of the outer shell 1 is filled with water. The inner diameter of the dispersion port 606 gradually increases from top to bottom. The outside of the dispersion port 606 is located underwater. The bottom of the exhaust pipe 603 is fixedly inserted through the top of the fixing plate 605. The top of the exhaust pipe 603 is connected to the outside of the outer shell 1. The upper end of the guide ring 601 is funnel-shaped. The annular pipe 404 is fixedly installed on the inner wall of the guide ring 601. The mist nozzle 405 is tilted at a 45-degree angle.

[0026] The above scheme is adopted as follows: by starting the motor 501 to drive the impeller 504 to rotate, air is drawn from the outside from the top of the outer casing 1. The air will enter the interior of the outer casing 1 and, under the guidance of the guide ring 601, the air containing exhaust gas passes through the interior of the guide ring 601. The water pump 401 is started to inject water into the interior of the annular pipe 404 through the first water inlet pipe 402. At the same time, the water will be sprayed out through the mist nozzle 405. Since the mist nozzle 405 is tilted downward at a 45-degree angle, the sprayed water mist forms an annular water curtain. When the air containing exhaust gas passes through the water curtain, the sprayed water droplets will adhere to the solid particles in the air, thereby increasing the weight of the particles. Under the weight of the water, they will fall to the bottom of the interior of the outer casing 1. The water mist sprayed by the mist nozzle 405 performs initial purification and separation of harmful gases in the air. The air that has undergone initial purification will enter the bottom of the interior of the outer casing 1 and undergo multiple purifications by water.

[0027] like Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the transmission wheel 702 is cam-shaped and has a hollow structure. The interior of the transmission wheel 702 is filled with limestone, and the top of the transmission wheel 702 is fixedly connected to the bottom of the fixed shaft 502 in the power assembly 5.

[0028] The above scheme is adopted: the limestone inside the transmission wheel 702 absorbs sulfur dioxide in the water, and the impeller 504 injects air into the water inside the outer shell 1. Since the air contains a large amount of automobile exhaust gas, which contains sulfur dioxide, and sulfur dioxide is soluble in water, the limestone absorbs the sulfur dioxide in the water.

[0029] Working principle and usage process of this invention: By installing the urban air purifier in the green belt of the city road, connecting the second water inlet pipe 403 to the water pipe, and filling water into the interior of the outer casing 1, The bottom of the dispersing port 606 and the guide ring 601 are below the water surface. By starting the motor 501 and the water pump 401, the motor 501 will drive the impeller 504 to rotate, and during the rotation, external air will be drawn into the interior of the outer casing 1. At the same time, the fallen leaves and weeds of the protective netting 2 serve as a barrier. The air containing exhaust gas entering the housing 1 will be guided by the guide ring 601 and enter the air intake pipe 602, and will be discharged upward from the water at the bottom of the housing 1. When the air is injected into the water through the dispersion port 606, the auger 505 will be rotated by the fixed shaft 502. As the auger 505 rotates During this process, the air in the water will be agitated, thus ensuring thorough mixing between the air and the water inside the outer casing 1. (This is because the car...) The exhaust gas contains sulfur dioxide, which is soluble in water, thus improving the purification effect on sulfur dioxide in the air. The purified air is discharged through exhaust pipe 603; When air containing exhaust gas passes through the inside of the guide ring 601, the water pump 401 is started to inject water into the inside of the annular pipe 404 through the first water inlet pipe 402. At the same time, the water will be sprayed out through the mist nozzle 405. Since the mist nozzle 405 is tilted downward at a 45-degree angle, the sprayed water mist forms a water curtain. When the air containing exhaust gas passes through the water curtain, the harmful gases in the air will be initially purified. The air that has been initially purified will enter the bottom of the inside of the outer casing 1 and be purified multiple times by water. After water is sprayed out through the mist nozzle 405 to purify the exhaust gas in the air, the water will fall into the interior of the outer casing 1 through the guide ring 601 and collect at the bottom of the inner casing 1. At the same time, the rotation of the auger 505 will drive the drive wheel 702 to rotate. Since sulfur dioxide is soluble in water, the water inside the outer casing 1 contains sulfur dioxide. The limestone inside the drive wheel 702 absorbs the sulfur dioxide in the water. During the rotation of the drive wheel 702, the protrusion of the drive wheel 702 will rotate to the bottom of the limiting plate 701. The water is squeezed by the protrusion of the transmission wheel 702, forming a sealed space between the transmission wheel 702, the baffle 706 and the limiting plate 701. As the transmission wheel 702 continues to rotate, the water in the sealed space is squeezed. At the same time, since the elastic coefficient of the second spring 707 is less than that of the first spring 705, the water inside the outer shell 1 is squeezed by the transmission wheel 702, which pushes the sealing block 708 and compresses the second spring 707, thereby discharging the water inside the outer shell 1 and keeping the water level inside the outer shell 1 stable.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An urban air purifier comprising a housing (1), characterised in that: A connecting block (8) is fixedly installed on the top of the outer shell (1), a top plate (3) is fixedly installed on the top of the connecting block (8), a protective net (2) is fixedly installed at the bottom of the top plate (3) at equal angles, a purification component (6) is fixedly installed inside the outer shell (1), a power component (5) is fixedly installed inside the purification component (6), a water inlet component (4) is fixedly installed on the top of the purification component (6), and a drainage component (7) is movably installed on the bottom of the power component (5).

2. The urban air purifier according to claim 1, characterized in that: The purification component (6) includes a guide ring (601), the outer shell (1) is fixedly installed with the guide ring (601), a fixing plate (605) is fixedly installed at the bottom of the guide ring (601), an exhaust pipe (603) is fixedly installed at the top of the fixing plate (605) at equal angles, an air inlet pipe (602) is fixedly installed at equal angles on the outside of the guide ring (601), a dispersion port (606) is fixedly installed at the bottom of the air inlet pipe (602), and a dustproof net (604) is fixedly installed inside the exhaust pipe (603).

3. The urban air purifier according to claim 2, characterized in that: The power assembly (5) includes a fixed frame (503), which is fixedly installed inside the guide ring (601). A motor (501) is fixedly installed inside the fixed frame (503). An impeller (504) is fixedly installed at the bottom of the motor (501). A fixed shaft (502) is fixedly installed at the bottom of the impeller (504). An auger (505) is fixedly installed outside the fixed shaft (502).

4. The urban air purifier according to claim 1, characterized in that: The drainage assembly (7) includes a drive wheel (702), the top of which is fixedly connected to the bottom of the fixed shaft (502) in the power assembly (5). A scraper (703) is fixedly installed on the outside of the drive wheel (702) at equal angles. A mesh plate (704) is fixedly installed on the top of the drive wheel (702) at equal angles. A limit plate (701) is fixedly installed inside the outer shell (1). A first spring (705) is fixedly installed on the inner wall of the outer shell (1) at equal angles. A baffle (706) is hinged on the inner wall of the outer shell (1) at equal angles. A fixing block (709) is fixedly installed on the inner wall of the outer shell (1) at equal angles. A second spring (707) is fixedly installed on one side of the fixing block (709). A sealing block (708) is fixedly installed on one side of the second spring (707).

5. A city air purifier according to claim 2, characterized in that: The water inlet assembly (4) includes a water pump (401), a second water inlet pipe (403) is fixedly installed on one side of the water pump (401), a first water inlet pipe (402) is fixedly installed on the top of the water pump (401), an annular pipe (404) is fixedly installed inside the guide ring (601), and a mist nozzle (405) is fixedly installed at an equal angle on the inner side of the annular pipe (404).

6. A city air purifier according to claim 2, characterized in that: The top of the air intake pipe (602) is connected to the interior of the guide ring (601). The bottom of the interior of the outer shell (1) is filled with water. The inner diameter of the dispersion port (606) gradually increases from top to bottom. The exterior of the dispersion port (606) is located underwater. The bottom of the exhaust pipe (603) is fixedly inserted through the top of the fixing plate (605). The top of the exhaust pipe (603) is connected to the exterior of the outer shell (1).

7. A city air purifier according to claim 4, characterized in that: The transmission wheel (702) is cam-shaped and hollow. The interior of the transmission wheel (702) is filled with limestone. The top of the transmission wheel (702) is fixedly connected to the bottom of the fixed shaft (502) in the power assembly (5).

8. A city air purifier according to claim 4, characterized in that: The inner wall of the outer shell (1) is provided with an arc-shaped groove at equal angles. The arc-shaped groove is adapted to the baffle (706). The curvature of the baffle (706) is consistent with the curvature of the inner side of the outer shell (1).

9. A city air purifier according to claim 4, characterized in that: The spring force coefficient of the first spring (705) is greater than that of the second spring (707). One side of the baffle (706) is in contact with the outside of the transmission wheel (702). The top of the baffle (706) is in contact with the bottom of the limiting plate (701). The bottom of the limiting plate (701) is located at the top of the transmission wheel (702).

10. A city air purifier according to claim 5, characterized in that: The upper end of the guide ring (601) is funnel-shaped, the annular tube (404) is fixedly installed on the inner wall of the guide ring (601), and the mist nozzle (405) is tilted at a 45-degree angle.

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