Air filtering device for passenger vehicle

Abstract

The invention discloses an air filtering device for a passenger vehicle, which comprises a tank body, a partition plate, a filtering unit, a water storage humidifying unit and a pressurizing centrifugal unit, a cover body is assembled on the top of the tank body, a central pipe is assembled on the filtering unit, and a pipe sleeve part is arranged on the partition plate; the pressurizing centrifugal unit comprises a motor, a spiral air conveying rod penetrating through the pipe sleeve part and the central pipe, a conical centrifugal cover coaxially assembled at the lower end of the spiral air conveying rod through a breathable first connecting frame and a pressurizing mechanism matched with the conical centrifugal cover, a plurality of vent holes are formed in the conical centrifugal cover, and an air inlet port and an air outlet port are formed in the tank body; the water storage humidifying unit is connected with the air outlet port, air pressure is continuously increased after air enters the tank body, Joule-Thomson effect can be generated when the air passes through the vent hole, condensate water is generated and separated under the centrifugal effect, humidity in the air can be reduced, the water storage humidifying unit is connected with the water outlet port, exhausted air can be humidified, and the air quality is improved. Therefore, the humidity of exhausted air is controlled, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of air filtration technology, and more specifically, to an air filtration device for passenger vehicles. Background Technology

[0002] With the improvement of transportation infrastructure, more and more families are choosing cars as their means of transportation, and more and more businesses are choosing cars as their mode of transport. During operation, cars need to filter the air they draw in. This air filtration is mainly achieved through air filters, which remove dust and other impurities from the air.

[0003] Chinese patent application CN202420276426.9, entitled "An Automotive Air Filter Device," discloses an automotive air filter device. The device includes an air pump located inside a housing, multiple air chambers outside the pump, a motor fixedly connected to the upper end of the pump, a rotating shaft at the upper end of the motor, a filter screen rotatably connected to the outer side of the shaft, and the filter screen fixedly connected to the inner wall of the housing. A rotating disc is fixedly connected to the upper end of the shaft, a cover filter is fixedly connected to the lower end of the disc, and multiple cone-shaped activated carbon adsorption pads are evenly fixedly connected to the lower end of the cover filter, enabling thorough filtration of the intake air.

[0004] Existing automotive air filters are all similar to the filtration devices described above. They can filter impurities in the air through physical filtration, but they cannot regulate or control the humidity of the filtered air, and cannot keep the humidity inside the car within a comfortable range for the human body. Therefore, there is a need to design an air filtration device for passenger vehicles. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this invention is to overcome the issue that existing air filtration devices have a single function and cannot regulate air humidity.

[0006] To achieve the above objectives, the present invention provides an air filtration device for passenger vehicles, comprising: a tank with a cover on the top, an inclined partition fitted to the inner wall of the tank, a filter unit fitted inside the tank and located below the partition, a water storage and humidification unit fitted at the bottom of the tank for collecting condensate, and a pressurized centrifugal unit. The filter unit is equipped with a central tube that is coaxially arranged with the tank body and passes through the filter unit. The partition plate is provided with a sleeve part that is assembled with the upper end of the central tube. The pressurized centrifugal unit includes a motor mounted on the cover, a spiral air conveying rod that is fixedly connected to the top of the motor output shaft and passes through the sleeve part and the central tube, a conical centrifugal shroud that is coaxially mounted with the lower end of the spiral air conveying rod through a first connecting frame that is ventilated, and a pressurizing mechanism that is assembled with the conical centrifugal shroud at the bottom of the inner side of the tank body. The conical centrifugal shroud is provided with several vent holes. The tank is provided with an air inlet port located above the partition and equipped with a one-way air inlet mechanism, and an air outlet port located between the partition and the filter unit. The water storage and humidification unit is connected to the air outlet port.

[0007] Preferably, the lower end of the central tube is coaxially fixedly connected to a conical cover that contacts the outer wall of the conical centrifuge shroud, and several vent holes are located below the conical cover; The pressurization mechanism includes a support rod fixedly connected to the tank body along the same axis, a conical air guide block vertically slidably sleeved on the support rod and matched with the conical centrifuge hood, a first limiting ring fixedly sleeved on the top of the support rod, and a first spring assembled on the support rod with its upper end abutting against the lower end of the conical air guide block.

[0008] Preferably, the top of the support rod is provided with a spherical groove, and the lower end of the spiral air conveying rod is coaxially fixedly connected to a ball-head rod that slides in contact with the spherical groove.

[0009] Preferably, the one-way air intake mechanism includes an air intake pipe mounted on the air intake port, a second limiting ring mounted on the inner wall of the air intake pipe, a sealing piece that can cover the side of the second limiting ring near the air intake port, and a second spring mounted inside the air intake pipe. The inner wall of the air intake pipe near the air intake port has a protruding limiting flange. The two ends of the second spring abut against the sealing plate and the limiting flange, respectively. The outer diameter of the sealing plate is smaller than the inner diameter of the air intake pipe.

[0010] Preferably, the filter unit includes a ventilated support plate that is fixedly fitted to the inner wall of the tank and fixedly connected to the lower end of the central tube, an installation plate located above the ventilated support plate and fixedly connected to the inner wall of the tank, and at least one filter element. A breathable mounting seat is provided between the breathable support plate and the mounting plate, and the breathable mounting seat is equipped with a mounting groove corresponding to the filter element. The bottom of the filter element is in close contact with the ventilated support plate. A circular first window corresponding to the filter element is provided through the mounting plate. The upper end of the filter element is in close contact with the side wall of the first window. The top of the filter element is the exhaust end.

[0011] Preferably, a second window corresponding to the first window is provided through the upper part of the partition, the diameter of the second window is greater than or equal to the diameter of the first window, a vertical connecting rod is assembled at the upper end of the cover, an isolation plate that can fit with the second window is assembled at the lower end of the connecting rod, and a second connecting frame that is connected to the filter element is fixedly connected to the lower end of the partition plate.

[0012] Preferably, the filter element includes a hollow mounting cylinder, a separator sheet threadedly connected to the top of the mounting cylinder, and a core body assembled inside the mounting cylinder, wherein the separator sheet is fixedly connected to the second connecting frame; The isolation plate has an exhaust port in the middle, and the core has an exhaust channel opposite to the exhaust port in the center.

[0013] Preferably, a drain outlet is provided at the bottom of the tank, and the bottom end of the support rod is assembled to the bottom of the tank through a hollow third connecting frame; The water storage and humidification unit includes a water collection component fixedly sleeved on the outside of the drain outlet and having a first end at the bottom, an absorbent cotton block assembled inside the water collection component, a water storage tank connected to a first port via a first solenoid valve at the top and a second solenoid valve at the bottom, and an electronic water pump whose inlet end is connected to the second solenoid valve. An air outlet pipe is installed on the air outlet port, and the water outlet of the electronic water pump is connected to the air outlet pipe through a first connecting pipe. An atomizing nozzle is installed at the connection between the first connecting pipe and the air outlet pipe.

[0014] Preferably, the second solenoid valve is connected to a three-way valve via a second connecting pipe, one end of which is connected to the inlet of the electronic water pump, and the other end of which is connected to a drain pipe via a fourth solenoid valve. A third solenoid valve is provided on the first connecting pipe.

[0015] According to the above technical solution, the air filtration device for passenger vehicles provided by the present invention has the following advantages compared with the prior art: Firstly, the air pressure continuously increases after entering the tank. When the pressurized air passes through the vent, the Joule-Thomson effect occurs, causing the moisture in the air to condense. The air entering the second space is filtered by the filter unit and then discharged through the outlet port, which can reduce the humidity in the air and filter out impurities in the air. Secondly, the centrifugal force generated when the conical centrifuge hood rotates facilitates the separation of condensed water from the air after the moisture in the air condenses into water. Thirdly, the water storage humidification unit is connected to the water outlet port, which can humidify the exhaust air and thus control the humidity of the exhaust air, making it highly practical; water can also be manually added to the water storage humidification unit to humidify the exhaust air.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of an air filtration device for passenger vehicles provided by the present invention; Figure 2 This is a partial cross-sectional view of an air filtration device for passenger vehicles provided by the present invention; Figure 3 This is a partial three-dimensional structural diagram of an air filtration device for passenger vehicles provided by the present invention. Figure 1 ; Figure 4 This is a partial three-dimensional structural diagram of an air filtration device for passenger vehicles provided by the present invention. Figure 2 ; Figure 5 This is a partial three-dimensional structural diagram of an air filtration device for passenger vehicles provided by the present invention. Figure 3 ; Figure 6 This invention provides an air filtration device for passenger vehicles. Figure 1 Cross-sectional view at point A in the middle; Figure 7 This is a cross-sectional schematic diagram of a filter element for an air filtration device used in passenger vehicles provided by the present invention. Figure 8 This is a partial three-dimensional structural diagram of an air filtration device for passenger vehicles provided by the present invention. Figure 4 ; Figure 9 This invention provides an air filtration device for passenger vehicles. Figure 1 Schematic diagram of the cross section at point B.

[0018] Description of Reference Numerals 1. Cover; 2. Tank body; 3. Partition plate; 4. Central tube; 5. Tube sleeve; 6. Motor; 7. Spiral air delivery rod; 8. First connecting frame; 9. Conical centrifuge hood; 10. Vent hole; 11. Air inlet port; 12. Air outlet port; 13. Conical hood; 14. Support rod; 15. Conical air guide block; 16. First limiting ring; 17. First spring; 18. Ball head rod; 19. Air inlet pipe; 20. Second limiting ring; 21. Sealing plate; 22. Second spring; 23. Limiting flange; 24. Ventilation support 25. Mounting plate; 26. Connecting rod; 27. Isolation plate; 28. Second connecting frame; 29. ​​Mounting cylinder; 30. Isolation plate; 31. Core; 32. Exhaust port; 33. Exhaust channel; 34. Third connecting frame; 35. Water collection component; 36. Absorbent cotton block; 37. First solenoid valve; 38. Second solenoid valve; 39. Water storage tank; 40. Electronic water pump; 41. Air outlet pipe; 42. First connecting pipe; 43. Atomizing nozzle; 44. Fourth solenoid valve; 45. Drain pipe; 46. Third solenoid valve. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "inner," and "outer" in the terminology represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0021] like Figure 1-9 As shown, an air filtration device for passenger vehicles includes: a tank 2 with a cover 1 mounted on top, an inclined partition 3 fitted to the inner wall of the tank 2, a filter unit mounted inside the tank 2 and located below the partition 3, a water storage and humidification unit and a pressurized centrifugal unit mounted at the bottom of the tank 2 for collecting condensate. The filter unit is equipped with a central tube 4 that is coaxial with the tank body 2 and passes through the filter unit. The partition plate 3 is provided with a sleeve 5 that is assembled with the upper end of the central tube 4. The pressurized centrifugal unit includes a motor 6 mounted on the cover 1, a spiral air conveying rod 7 that is fixedly connected to the output shaft of the motor 6 at the top and passes through the sleeve 5 and the central tube 4, a conical centrifugal shroud 9 that is coaxially mounted with the lower end of the spiral air conveying rod 7 through a ventilated first connecting frame 8, and a pressurizing mechanism that is assembled with the conical centrifugal shroud 9 at the bottom of the inner side of the tank body 2. The conical centrifugal shroud 9 is provided with a plurality of vent holes 10. The tank 2 is provided with an air inlet port 11 located above the partition 3 and equipped with a one-way air inlet mechanism, and an air outlet port 12 located between the partition 3 and the filter unit. The water storage and humidification unit is connected to the air outlet port 12.

[0022] In the above technical solution, the one-way air intake mechanism set at the air intake port 11 realizes one-way air intake and avoids the reverse transmission of air entering the tank 2. The space above the partition 3 is the first space, the space below the filter unit is the second space, and the space between the filter unit and the partition 3 is the third space. The air intake port 11 can be connected to the suction pump, which is an existing mature technology. Air first enters the first space. The continuous input of air causes the air pressure in the first space to rise. The motor 6 drives the spiral air conveyor 7 to rotate. The rotating spiral air conveyor 7 accelerates the air flow speed in the central tube 4. By increasing the air flow speed, the amount of air entering the second space increases, further increasing the air pressure in the second space. When the spiral air conveyor 7 rotates, it drives the conical centrifugal shroud 9 to rotate. In conjunction with the pressurization mechanism, some air is discharged through the vent 10. When the pressurized air passes through the vent 10, the Joule-Thomson effect occurs, causing the moisture in the air to condense. The air entering the second space is filtered by the filter unit to remove impurities. After passing through the filter unit, the air enters the third space and is then discharged through the air outlet 12. In this way, the humidity in the air can be reduced. When the conical centrifuge 9 rotates, it generates centrifugal force, which helps to separate the moisture in the air after it condenses into condensate. Furthermore, when the air humidity is too low during discharge, the water storage humidification unit is connected to the water outlet port to humidify the discharged air, thereby controlling the humidity of the discharged air, making it highly practical; when the air is dry and no condensation can be produced, water can also be manually added to the water storage humidification unit to humidify the discharged air.

[0023] In a preferred embodiment of the present invention, the lower end of the central tube 4 is coaxially fixedly connected to a conical cover 13 that contacts the outer wall of the conical centrifugal cover 9, and a plurality of vent holes 10 are located below the conical cover 13. The pressurization mechanism includes a support rod 14 fixedly connected to the tank body 2 along the same axis, a conical air guide block 15 vertically slidably sleeved on the support rod 14 and matched with the conical centrifuge shroud 9, a first limiting ring 16 fixedly sleeved on the top of the support rod 14, and a first spring 17 assembled on the support rod 14 and whose upper end abuts against the lower end of the conical air guide block 15.

[0024] In the above technical solution, when the air intake is larger, the air pressure inside the conical centrifuge 9 will further increase. The increased air pressure will push the conical air guide block 15 to move downward and compress the first spring 17, thereby increasing the width of the channel between the conical air guide block 15 and the conical centrifuge 9. This allows the conical air guide block 15 to disperse airflows at different speeds. Furthermore, when air passes through the channel between the conical air guide block 15 and the conical centrifuge 9, the Joule-Thomson effect will also occur, and some condensate will be released.

[0025] In a preferred embodiment of the present invention, the top of the support rod 14 is provided with a spherical groove, and the lower end of the spiral air conveying rod 7 is coaxially fixedly connected to a ball-head rod 18 that slides in contact with the spherical groove.

[0026] In the above technical solution, the lower end of the spiral gas conveying rod 7 slides in contact with the top of the support rod 14 through the ball head rod 18, which can improve the stability of the spiral gas conveying rod 7 when it rotates.

[0027] In a preferred embodiment of the present invention, the one-way air intake mechanism includes an air intake pipe 19 mounted on an air intake port 11, a second limiting ring 20 mounted on the inner wall of the air intake pipe 19, a sealing piece 21 that can cover the side of the second limiting ring 20 near the air intake port 11, and a second spring 22 mounted inside the air intake pipe 19. The inner wall of the intake pipe 19 near the intake port 11 has a protruding limiting flange 23. The two ends of the second spring 22 abut against the sealing plate 21 and the limiting flange 23 respectively. The outer diameter of the sealing plate 21 is smaller than the inner diameter of the intake pipe 19.

[0028] In the above technical solution, the one-way air intake mechanism at the air intake port 11 can prevent air flow, which is beneficial to increasing the air pressure in the first space. The air delivered from the air intake pipe 19 will push the sealing plate 21 to separate from the second limiting ring 20, so that the air enters the air intake port 11. The setting of the second spring 22 causes the air in the air intake pipe 19 to be initially compressed, that is, the air pressure can push the sealing plate 21 to be delivered into the air intake port 11. When the air supply stops, the second spring 22 will push the sealing plate 21 to cover the second limiting ring 20, and the air in the first space cannot be delivered in reverse, which is beneficial to increasing the air pressure in the first space.

[0029] In a preferred embodiment of the present invention, the filter unit includes a breathable support plate 24 that is fitted and fixedly assembled on the inner wall of the tank 2 and fixedly connected to the lower end of the central tube 4, an installation plate 25 located above the breathable support plate 24 and fitted and fixedly connected to the inner wall of the tank 2, and at least one filter element. A breathable mounting seat is provided between the breathable support plate 24 and the mounting plate 25, and the breathable mounting seat is equipped with a mounting groove corresponding to the filter element. The bottom of the filter element is in contact with the ventilated support plate 24. A circular first window corresponding to the filter element is provided through the mounting plate 25. The upper end of the filter element is in contact with the side wall of the first window. The top of the filter element is the exhaust end.

[0030] In the above technical solution, the air in the second space passes through the breathable support plate 24, then through the filter element and enters the third space through the exhaust end at the top. The air is then discharged after being filtered by the filter element.

[0031] In a preferred embodiment of the present invention, a second window corresponding to the first window is provided through the upper part of the partition 3, the diameter of the second window is greater than or equal to the diameter of the first window, a vertical connecting rod 26 is assembled at the upper end of the cover 1, an isolation plate 27 that can fit with the second window is assembled at the lower end of the connecting rod 26, and a second connecting frame 28 that is connected to the filter element is fixedly connected at the lower end of the partition 3 plate.

[0032] In the above technical solution, because the isolation plate 27 is attached to the second window, air will not pass through the second window and directly enter the third space during use, thus separating the first space and the third space. When the filter element needs to be replaced, the cover 1 is separated from the tank 2, and the cover 1 is lifted upward. The cover 1 will drive the connecting rod 26, the isolation plate 27, the second connecting frame 28 and the filter element to move upward together. The filter element will pass through the second window, and several filter elements can be pulled out to facilitate the replacement and cleaning of the filter elements. The operation is simple and convenient.

[0033] In a preferred embodiment of the present invention, the filter element includes a hollow mounting cylinder 29, an isolation plate 30 threadedly connected to the top of the mounting cylinder 29, and a core 31 assembled inside the mounting cylinder 29. The isolation plate 30 is fixedly connected to the second connecting frame 28. The isolation plate 30 has an exhaust port 32 in the middle, and the core 31 has an exhaust channel 33 in the center, which is opposite to the exhaust port 32.

[0034] In the above technical solution, the exhaust port 32 on the isolation plate 30 is the exhaust end of the filter element. After passing through the hollow mounting cylinder 29, the air passes through the core 31 and enters the exhaust channel 33, and then enters the third space through the exhaust port 32. After the filter element is pulled out, rotate the mounting cylinder 29 to separate it from the separator 30, so that the internal core 31 can be replaced. The operation is simple and convenient.

[0035] In a preferred embodiment of the present invention, a drain outlet is provided at the bottom of the tank body 2, and the bottom end of the support rod 14 is assembled to the bottom of the tank body 2 through a hollow third connecting frame 34. The water storage and humidification unit includes a water collection component 35 fixedly sleeved on the outside of the drain outlet and with a first end at the bottom, an absorbent cotton block 36 assembled inside the water collection component 35, a water storage tank 39 connected to the first port at the top via a first solenoid valve 37 and connected to the second solenoid valve 38 at the bottom, and an electronic water pump 40 whose water inlet end is connected to the second solenoid valve 38. An air outlet pipe 41 is installed on the air outlet port 12. The water outlet end of the electronic water pump 40 is connected to the air outlet pipe 41 through a first connecting pipe 42. An atomizing nozzle 43 is installed at the connection between the first connecting pipe 42 and the air outlet pipe 41.

[0036] In the above technical solution, the condensate in the second space will accumulate at the bottom of the tank 2 and then flow into the water storage tank 39 through the drain outlet. The absorbent cotton block 36 can filter particulate impurities in the condensate. When condensate flows into the water storage tank 39, the first solenoid valve 37 opens and the second solenoid valve 38 closes, preventing air from leaking through the water storage and humidification unit inside the tank 2. When the electronic water pump 40 starts, the first solenoid valve 37 closes and the second solenoid valve 38 opens, separating the second space from the water storage tank 39. The electronic water pump 40 then delivers the condensate in the water storage tank 39 to the first connecting pipe 42, where it is atomized by the atomizing nozzle 43 and sprayed into the air discharged from the air outlet 12, thereby humidifying the air and controlling the humidity of the discharged air.

[0037] In a preferred embodiment of the present invention, the second solenoid valve 38 is connected to a three-way valve via a second connecting pipe. One end of the three-way valve is connected to the water inlet of the electronic water pump 40, and the other end of the three-way valve is connected to a drain pipe 45 via a fourth solenoid valve 44. A third solenoid valve 46 is provided on the first connecting pipe 42.

[0038] In the above technical solution, when the fourth solenoid valve 44 is open, the condensate inside the water storage tank 39 can also be discharged to the outside through the drain pipe 45; when the fourth solenoid valve 44 is closed and the third solenoid valve 46 is open, the electronic water pump 40 can deliver the condensate to the atomizing nozzle 43 and spray it into the exhaust pipe for humidification.

[0039] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0041] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An air filtration device for passenger vehicles, characterized in that, include: The tank (2) is fitted with a cover (1) on top, an inclined partition (3) is fitted to the inner wall of the tank (2), a filter unit is fitted inside the tank (2) and located below the partition (3), a water storage and humidification unit and a pressurized centrifugal unit are fitted at the bottom of the tank (2) for collecting condensate. The filter unit is equipped with a central tube (4) that is coaxial with the tank (2) and passes through the filter unit. The partition (3) is provided with a sleeve (5) that is assembled with the upper end of the central tube (4). The pressurized centrifugal unit includes a motor (6) assembled on the cover (1), a spiral air conveying rod (7) that is fixedly connected to the output shaft of the motor (6) and passes through the sleeve (5) and the central tube (4), a conical centrifugal hood (9) that is coaxially assembled with the lower end of the spiral air conveying rod (7) through a first connecting frame (8) that is breathable, and a pressurizing mechanism that is assembled on the bottom of the inner side of the tank (2) and matches the conical centrifugal hood (9). The conical centrifugal hood (9) is provided with several vent holes (10). The tank (2) is provided with an air inlet port (11) located above the partition (3) and equipped with a one-way air inlet mechanism, and an air outlet port (12) located between the partition (3) and the filter unit. The water storage and humidification unit is connected to the air outlet port (12).

2. An air filtration device for passenger vehicles according to claim 1, characterized in that, The lower end of the central tube (4) is coaxially fixedly connected to a conical cover (13) that contacts the outer wall of the conical centrifugal cover (9), and several ventilation holes (10) are located below the conical cover (13). The pressurization mechanism includes a support rod (14) fixedly connected to the tank (2) along the same axis, a conical air guide block (15) vertically slidably sleeved on the support rod (14) and matched with the conical centrifuge hood (9), a first limiting ring (16) fixedly sleeved on the top of the support rod (14), and a first spring (17) assembled on the support rod (14) with its upper end abutting against the lower end of the conical air guide block (15).

3. An air filtration device for passenger vehicles according to claim 2, characterized in that, The top of the support rod (14) is provided with a spherical groove, and the lower end of the spiral gas conveying rod (7) is coaxially fixedly connected to a ball head rod (18) that slides in contact with the spherical groove.

4. An air filtration device for passenger vehicles according to claim 1, characterized in that, The one-way air intake mechanism includes an air intake pipe (19) mounted on the air intake port (11), a second limiting ring (20) mounted on the inner wall of the air intake pipe (19), a sealing piece (21) that can cover the side of the second limiting ring (20) near the air intake port (11), and a second spring (22) mounted inside the air intake pipe (19). The intake pipe (19) has a limiting flange (23) protruding from the inner wall near the intake port (11). The two ends of the second spring (22) abut against the sealing plate (21) and the limiting flange (23) respectively. The outer diameter of the sealing plate (21) is smaller than the inner diameter of the intake pipe (19).

5. An air filtration device for passenger vehicles according to claim 1, characterized in that, The filter unit includes a breathable support plate (24) that is fitted and fixedly assembled on the inner wall of the tank (2) and fixedly connected to the lower end of the central tube (4), an installation plate (25) located above the breathable support plate (24) and fitted and fixedly connected to the inner wall of the tank (2), and at least one filter element; A breathable mounting seat is provided between the breathable support plate (24) and the mounting plate (25), and the breathable mounting seat is equipped with a mounting groove corresponding to the filter element; The bottom of the filter element is in contact with the breathable support plate (24), and a circular first window corresponding to the filter element is provided through the mounting plate (25). The upper end of the filter element is in contact with the side wall of the first window, and the top of the filter element is the exhaust end.

6. An air filtration device for passenger vehicles according to claim 5, characterized in that, The partition (3) has a second window corresponding to the first window through it. The diameter of the second window is greater than or equal to the diameter of the first window. The upper end of the cover (1) is equipped with a vertical connecting rod (26). The lower end of the connecting rod (26) is equipped with an isolation plate (27) that can fit with the second window. The lower end of the partition (3) plate is fixedly connected with a second connecting frame (28) that is connected to the filter element.

7. An air filtration device for passenger vehicles according to claim 6, characterized in that, The filter element includes a hollow mounting cylinder (29), an isolation plate (30) threadedly connected to the top of the mounting cylinder (29), and a core (31) assembled inside the mounting cylinder (29). The isolation plate (30) is fixedly connected to the second connecting frame (28). The isolation plate (30) has an exhaust port (32) in the middle, and the core (31) has an exhaust channel (33) opposite to the exhaust port (32) in the center.

8. An air filtration device for passenger vehicles according to claim 2, characterized in that, The bottom of the tank (2) is provided with a drain outlet, and the bottom end of the support rod (14) is assembled to the bottom of the tank (2) through a hollow third connecting frame (34); The water storage and humidification unit includes a water collection component (35) fixedly sleeved on the outside of the drain outlet and with a first end at the bottom, an absorbent cotton block (36) assembled inside the water collection component (35), a water storage tank (39) connected to the first port at the top via a first solenoid valve (37) and connected to the second solenoid valve (38) at the bottom, and an electronic water pump (40) with its inlet end connected to the second solenoid valve (38). The air outlet port (12) is equipped with an air outlet pipe (41), and the water outlet end of the electronic water pump (40) is connected to the air outlet pipe (41) through a first connecting pipe (42). An atomizing nozzle (43) is installed at the connection between the first connecting pipe (42) and the air outlet pipe (41).

9. An air filtration device for a passenger vehicle according to claim 8, characterized in that, The second solenoid valve (38) is connected to a three-way valve via a second connecting pipe. One end of the three-way valve is connected to the water inlet of the electronic water pump (40), and the other end of the three-way valve is connected to a drain pipe (45) via a fourth solenoid valve (44). A third solenoid valve (46) is provided on the first connecting pipe (42).

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