Fresh air filtering device with filter element easy to replace

Abstract

The invention discloses a fresh air filtering device with a filter element easy to replace, and relates to the technical field of air filtering equipment. The invention provides a fresh air filtering device easy to replace a filter element, which comprises a mounting box body and the like, the mounting box body is provided with a cover plate through bolts, the mounting box body is slidably connected with a filter shell, the filter shell is fixedly connected with a sealing plate, the filter shell is clamped with a filtering element, and the filter shell is slidably connected with a moving plate. A covering film is fixedly connected between the movable plate and the sealing plate, the movable plate is fixedly connected with paired clamping frames, the filter shell is fixedly connected with a guide block, and the guide block is fixedly connected with a magnet. The filter shell can be wrapped in the process of replacing the filter element through the clamping frame, the covering film and other parts, so that the situation that part of dust on the surfaces of the parts such as the filter shell falls off due to external disturbance, dust raising is caused, the surrounding environment is polluted, and the body health of workers is affected is avoided; and the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air filtration equipment, and particularly to a fresh air filtration device with an easy-to-replace filter element. Background Art

[0002] The fresh air filtration device is a key component installed in the fresh air system, mainly used to filter the air entering the room and remove pollutants such as dust, pollen, bacteria, viruses, and harmful gases, so as to provide fresh and healthy air for the room. Since the filter element will gradually accumulate a large amount of pollutants during long-term use, resulting in a gradual decline in the filtration efficiency and an inability to effectively filter harmful substances in the air, the indoor air quality deteriorates, which in turn affects people's health. Therefore, it is very necessary to replace the filter element frequently. In addition, the overly dirty filter element will increase the operating resistance of the fresh air system, increase the system energy consumption, and thus reduce the service life of the equipment.

[0003] When replacing the filter element in the existing fresh air filtration device, since a large amount of dust and other pollutants will gradually accumulate on the surface of the filter element during long-term use, when the worker removes the filter element from the fresh air filtration device, some of the dust on the surface of the filter element will inevitably fall off due to external disturbance and cause dust flying, which will pollute the surrounding environment and affect the physical health of the worker, resulting in a poor user experience.

[0004] Based on the above situation, the present invention proposes a fresh air filtration device with an easy-to-replace filter element and a good user experience. Summary of the Invention

[0005] In order to overcome the drawback that when the filter element in the existing fresh air filtration device is replaced, some of the dust on its surface will inevitably fall off due to external disturbance and cause dust flying, which will pollute the surrounding environment and affect the physical health of the worker, resulting in a poor user experience, the present invention provides a fresh air filtration device with an easy-to-replace filter element and a good user experience.

[0006] A fresh air filtering device with a filter element that is easy to replace, comprising an installation box body, a cover plate, connection ports, a blower, a filter housing, a sealing plate, a filter element, an opener, a clamping frame, a moving plate, a guiding block, a magnet, and a covering film. The installation box body is installed with the cover plate by bolts. The installation box body is fixedly connected and communicated with a pair of connection ports. The installation box body is fixedly connected with a pair of blowers. The installation box body is fixedly connected with a pair of openers. The installation box body is slidably connected with the filter housing. The filter housing is fixedly connected with the sealing plate. The sealing plate is in contact and cooperation with the cover plate. The filter housing is clamped with the filter element. The filter housing is slidably connected with the moving plate. A covering film is fixedly connected between the moving plate and the sealing plate. The moving plate is fixedly connected with a pair of clamping frames. The clamping frames are in extrusion cooperation with the installation box body. The filter housing is fixedly connected with the guiding block. The guiding block is slidably connected with the moving plate. The guiding block is fixedly connected with the magnet. The magnet is in magnetic attraction cooperation with the moving plate.

[0007] As a preferred technical solution of the present invention, the filter housing is provided with a pair of longitudinally distributed strip-shaped slot holes.

[0008] As a preferred technical solution of the present invention, one side of the clamping frame is provided with a hemispherical elastic protrusion.

[0009] As a preferred technical solution of the present invention, it further comprises a dust removal mechanism. The dust removal mechanism is arranged on the sealing plate. The dust removal mechanism includes a mounting plate, an air pump, a collection box, a battery, a connecting pipe, and a suction plate. The mounting plate is fixedly connected to the sealing plate. The mounting plate is fixedly connected with the air pump. The mounting plate is clamped with the collection box. The air outlet of the air pump is fixedly connected and communicated with the collection box through a pipeline. The mounting plate is clamped with the battery. The battery is electrically connected to the air pump. The sealing plate is fixedly connected with a pair of suction plates. A connecting pipe is fixedly connected and communicated between the pair of suction plates and the air inlet of the air pump.

[0010] As a preferred technical solution of the present invention, the collection box is fixedly connected with a pair of filter meshes.

[0011] As a preferred technical solution of the present invention, it further comprises a humidifying mechanism. The humidifying mechanism is arranged on the sealing plate. The humidifying mechanism includes a liquid storage cylinder, a reel, a diversion pipe, a pressing ball, a sponge block, a liquid guiding pipe, and a liquid pump. The reel is rotatably connected to the sealing plate. The reel is fixedly connected with the liquid storage cylinder. The reel is wound with a pair of liquid guiding pipes. A diversion pipe is fixedly connected and communicated between the pair of liquid guiding pipes and the liquid storage cylinder. The diversion pipe is fixedly connected and communicated with the liquid pump. The liquid pump is electrically connected to the battery. The liquid guiding pipe is fixedly connected with evenly distributed pressing balls. The pressing balls are in extrusion cooperation with the covering film. A sponge block is fixedly connected between the pair of clamping frames. The sponge block is fixedly connected and communicated with the liquid guiding pipe. The sponge block is in contact and cooperation with the filter housing.

[0012] As a preferred technical solution of the present invention, it further comprises a fitting mechanism. The fitting mechanism is arranged on the clamping frame. The fitting mechanism includes an elastic piece and a pressing block. The elastic piece is fixedly connected to the clamping frame. The elastic piece is fixedly connected with the pressing block. The pressing block is in extrusion cooperation with the covering film.

[0013] As a preferred technical solution of the present invention, it further includes a support mechanism. The support mechanism is arranged on the sealing plate. The support mechanism includes a blocking block, a support block, a compression spring and a guide rod. The paired blocking blocks are fixedly connected to the sealing plate. The installation box body is fixedly connected with paired guide rods. The guide rods are slidably connected with a support block. A compression spring is fixedly connected between the support block and the installation box body. The support block is in extrusion fit with the blocking block, and the support block is in contact fit with the filter housing.

[0014] Compared with the prior art, the present invention has the following advantages: 1. Through components such as the clamping frame and the covering film, the present invention can wrap the filter housing during the process of replacing the filter element, so as to avoid part of the dust on the surface of components such as the filter housing from falling off due to external disturbance and causing dust emission, thereby polluting the surrounding environment and affecting the physical health of workers, improving the user experience, and enhancing the practicality of this fresh air filtering device.

[0015] 2. Through components such as the air pump and the suction plate, the present invention can absorb the dust that falls off from the surface of components such as the filter housing due to external disturbance, so as to avoid the falling dust from causing dust emission and leaking out, thereby polluting the surrounding environment and affecting the physical health of workers, and enhancing the practicality of this fresh air filtering device.

[0016] 3. Through components such as the liquid pump and the sponge block, the present invention can not only humidify the surface of the filter housing to reduce the generation of dust, but also make the covering film fit with the filter housing, so as to avoid the generated dust from leaking out and affecting the surrounding environment and the physical health of workers, and enhancing the practicality of this fresh air filtering device.

[0017] 4. Through components such as the pressing ball and the pressing block, the present invention can keep the covering film tightly attached to the filter housing, so as to avoid gaps between the covering film and the filter housing and resulting in dust leakage, thereby affecting the surrounding environment and the physical health of workers, and enhancing the practicality of this fresh air filtering device.

[0018] 5. Through components such as the blocking block and the support block, the present invention can provide additional support for the extracted components such as the filter housing, so as to avoid the components such as the clamping frame from shifting when being extracted and colliding with components such as the installation box body and even being damaged due to unstable manual support, and enhancing the practicality and stability of this fresh air filtering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of components such as the installation box body, the cover plate and the connection port of the present invention.

[0021] Figure 3Schematic diagram of the three-dimensional structure of components such as the connection port, fan, and filter housing of the present invention.

[0022] Figure 4 Schematic diagram of the exploded three-dimensional structure of components such as the filter housing, sealing plate, and filter element of the present invention.

[0023] Figure 5 Schematic diagram of the three-dimensional structure of components such as the moving plate, guide block, and magnet of the present invention.

[0024] Figure 6 Schematic diagram of the three-dimensional structure of components such as the guide block, magnet, and covering film of the present invention.

[0025] Figure 7 Schematic diagram of the three-dimensional structure of components such as the card holder, moving plate, and covering film of the present invention.

[0026] Figure 8 Schematic diagram of the three-dimensional structure of components such as the mounting plate, air pump, and collection box of the present invention.

[0027] Figure 9 Schematic diagram of the three-dimensional structure of components such as the battery, connecting pipe, and suction plate of the present invention.

[0028] Figure 10 Schematic diagram of the three-dimensional structure of components such as the liquid storage cylinder, reel, and diversion pipe of the present invention.

[0029] Figure 11 Schematic diagram of the three-dimensional structure of components such as the pressing ball, sponge block, and liquid guide pipe of the present invention.

[0030] Figure 12 Schematic diagram of the three-dimensional structure of components such as the elastic piece, pressing block, and card holder of the present invention.

[0031] Figure 13 Schematic diagram of the three-dimensional structure of components such as the abutting block, supporting block, and compression spring of the present invention.

[0032] Figure 14 Schematic diagram of the three-dimensional structure of components such as the supporting block, compression spring, and guide rod of the present invention.

[0033] Wherein: 1. Installation box body, 11. Cover plate, 12. Connection port, 13. Fan, 14. Filter housing, 1401. Sealing plate, 1402. Filter element, 15. Opener, 16. Card holder, 17. Moving plate, 18. Guide block, 19. Magnet, 110. Covering film, 2. Mounting plate, 21. Air pump, 22. Collection box, 23. Battery, 24. Connecting pipe, 25. Suction plate, 3. Liquid storage cylinder, 31. Reel, 32. Diversion pipe, 33. Pressing ball, 34. Sponge block, 35. Liquid guide pipe, 36. Liquid pump, 4. Elastic piece, 41. Pressing block, 5. Abutting block, 51. Supporting block, 52. Compression spring, 53. Guide rod. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] A fresh air filtering device with an easy-to-replace filter element, as Figures 1-7 shown, includes an installation box body 1, a cover plate 11, a connection port 12, a fan 13, a filter housing 14, a sealing plate 1401, a filter element 1402, a switch 15, a clamping frame 16, a moving plate 17, a guiding block 18, a magnet 19, and a covering film 110. The cover plate 11 is installed in the middle of the front side of the installation box body 1 through bolts. The front and rear parts on both left and right sides of the installation box body 1 are fixedly connected and communicated with the connection port 12. The left and right parts on the rear side of the installation box body 1 are fixedly connected with the fan 13. The left and right parts on the front side of the installation box body 1 are fixedly connected with the switch 15. The filter housing 14 is slidably connected inside the installation box body 1. The sealing plate 1401 is fixedly connected to the front side of the filter housing 14. The sealing plate 1401 is in contact and cooperation with the cover plate 11. The filter element 1402 is clamped inside the filter housing 14. The moving plate 17 is slidably connected to the front side of the outside of the filter housing 14. The covering film 110 is fixedly connected between the moving plate 17 and the sealing plate 1401. The upper and lower parts on both left and right sides of the moving plate 17 are fixedly connected with the clamping frame 16. The clamping frame 16 is in extrusion cooperation with the installation box body 1. The guiding block 18 is fixedly connected to the top of the filter housing 14. The guiding block 18 is slidably connected with the moving plate 17. The magnet 19 is fixedly connected to the rear side of the guiding block 18. The magnet 19 is in magnetic attraction cooperation with the moving plate 17.

[0037] As Figures 2-6 shown, strip-shaped slot holes longitudinally distributed in the front and rear directions are opened on both left and right sides of the filter housing 14.

[0038] As Figure 7 shown, an elastic protrusion in the shape of a hemisphere is provided at the lower part of the rear side of the clamping frame 16.

[0039] When workers need to filter fresh air, they can first fix components such as the installation box body 1 to the indoor ceiling through bolts and connect the connection port 12 to the corresponding ventilation duct. Then, they can control the air flow through components such as the fan 13 and the opener 15 and filter the fresh air with the help of the filter element 1402. When the filter element 1402 needs to be replaced due to long-term use, the worker can first remove the cover plate 11 from the installation box body 1, and then pull out components such as the filter housing 14, the sealing plate 1401, and the filter element 1402 forward for replacement. During this period, the guide block 18 and the magnet 19 will move forward with components such as the filter housing 14, while the clamping frame 16 and the moving plate 17 cannot move forward due to the limitation of the installation box body 1 and the elastic protrusions. At this time, components such as the sealing plate 1401 will move relative to the moving plate 17, so that the covering film 110 in the folded state will gradually unfold and wrap the partially pulled-out filter housing 14. When the rear end of the filter housing 14 moves forward to the front end of the installation box body 1, the covering film 110 has been completely unfolded and has completed the wrapping of components such as the filter housing 14, and the magnet 19 has also moved forward to contact and adsorb and fix with the moving plate 17. In this way, the filter housing 14 can be wrapped during the process of replacing the filter element 1402, so as to avoid part of the dust on the surface of components such as the filter housing 14 from falling off due to external disturbance and causing dust, thereby polluting the surrounding environment and affecting the physical health of workers. When the worker continues to move components such as the filter housing 14 and the magnet 19 forward, the magnet 19 will forcibly squeeze and drive the moving plate 17 and the clamping frame 16 forward, and the elastic protrusions on the clamping frame 16 will also deform and separate from the installation box body 1. In this way, components such as the filter housing 14 can be pulled out of the installation box body 1. After components such as the filter housing 14 are pulled out, since the magnet 19 is adsorbed and fixed with the moving plate 17, the covering film 110 will remain in a taut state and continuously wrap components such as the filter housing 14. After cleaning and replacing components such as the filter element 1402, the worker can first move components such as the filter housing 14 backward to reset and return to the original state, and then install the cover plate 11 back to the installation box body 1 through bolts.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, such as Figure 8 and Figure 9As shown in the figure, it further includes a dust removal mechanism. The dust removal mechanism is arranged on the sealing plate 1401. The dust removal mechanism includes a mounting plate 2, an air pump 21, a collection box 22, a battery 23, a connecting pipe 24 and a suction plate 25. The mounting plate 2 is fixedly connected to the bottom of the sealing plate 1401. The air pump 21 is fixedly connected to the left part of the mounting plate 2. The collection box 22 is clamped to the bottom of the mounting plate 2. The air outlet of the air pump 21 is fixedly connected and communicated with the collection box 22 through a pipeline. The battery 23 is clamped to the right part of the mounting plate 2. The battery 23 is electrically connected to the air pump 21. Suction plates 25 are fixedly connected to the left and right parts on the rear side of the sealing plate 1401. A connecting pipe 24 is fixedly connected and communicated between the left and right suction plates 25 and the air inlet of the air pump 21.

[0042] As Figure 8 and Figure 9 shown in the figure, filter meshes are fixedly connected to both left and right sides of the collection box 22.

[0043] When the worker moves components such as the filter housing 14 forward, the air pump 21 can also be started. The air pump 21 will absorb the dust that has fallen off the surfaces of components such as the filter housing 14 due to external disturbances through the connecting pipe 24 and the suction plates 25 and collect it in the collection box 22, thereby avoiding the raised dust caused by the fallen dust from leaking outwards, further polluting the surrounding environment and affecting the physical health of the worker. After the worker completely withdraws components such as the filter housing 14, the air pump 21 can be turned off. The dust and other impurities collected in the collection box 22 need to be cleaned regularly. The main function of the battery 23 is to supply power to the air pump 21.

[0044] As Figure 10 and Figure 11 shown in the figure, it further includes a wetting mechanism. The wetting mechanism is arranged on the sealing plate 1401. The wetting mechanism includes a liquid storage cylinder 3, a reel 31, a diversion pipe 32, a pressure ball 33, a sponge block 34, a liquid guide pipe 35 and a liquid pump 36. The reel 31 is rotatably connected to the middle of the sealing plate 1401. The liquid storage cylinder 3 is fixedly connected to the front side of the reel 31. Two liquid guide pipes 35 are wound around the middle of the reel 31. The diversion pipe 32 is fixedly connected and communicated between the two liquid guide pipes 35 and the liquid storage cylinder 3. The liquid pump 36 is fixedly connected and communicated to the middle of the diversion pipe 32. The liquid pump 36 is electrically connected to the battery 23. Pressure balls 33 are fixedly connected to the outside of the liquid guide pipe 35 and are in extrusion fit with the covering film 110. A sponge block 34 is fixedly connected between the bottoms of the two clamping frames 16 on the same left and right side. The sponge block 34 is fixedly connected and communicated with the adjacent liquid guide pipe 35. The sponge block 34 is in contact fit with the filter housing 14.

[0045] When components such as the filter housing 14 move forward and slide relative to components such as the moving plate 17, components such as the reel 31 will move forward with the sealing plate 1401, while the sponge block 34 will remain stationary with the holder 16. Therefore, components such as the reel 31 will move relative to the sponge block 34, and the liquid guide tube 35 will be gradually drawn out, driving components such as the reel 31 to rotate forward. The drawn part of the liquid guide tube 35 will contact the outer side of the covering film 110, and the pressure ball 33 outside the liquid guide tube 35 will squeeze the covering film 110 to make it fit closely with the filter housing 14 as much as possible. During this period, the worker can also start the liquid pump 36, and the liquid pump 36 will inject the water in the liquid storage cylinder 3 into the sponge block 34 through the diversion tube 32 and the liquid guide tube 35. Therefore, when the filter housing 14 moves forward and slides relative to the sponge block 34, the sponge block 34 will wipe and humidify the surface of the filter housing 14 to reduce the generation of dust. Moreover, the humidified filter housing 14 can also fit better with the covering film 110, so as to avoid the leakage of the generated dust to the outside and affect the surrounding environment and the health of the workers. When the components such as the filter housing 14 are completely drawn out, the liquid pump 36 can be turned off. When the worker moves the components such as the filter housing 14 backward to reset and return to the original state, it is also necessary to make components such as the reel 31 rotate reversely and rewind the liquid guide tube 35.

[0046] As Figure 2 and Figure 12 shown, it further includes a fitting mechanism. The fitting mechanism is arranged on the holder 16. The fitting mechanism includes an elastic sheet 4 and a pressing block 41. The elastic sheet 4 is fixedly connected to the front side of the holder 16, and the pressing block 41 is fixedly connected to the front end of the elastic sheet 4. The pressing block 41 is in extrusion fit with the covering film 110.

[0047] When components such as the sealing plate 1401 slide relative to the moving plate 17 and the covering film 110 is gradually unfolded, since the pressing block 41 will squeeze the covering film 110 under the action of the elastic sheet 4, the gradually unfolded part of the covering film 110 will be kept taut and in close contact with the filter housing 14 under the extrusion and pulling of the pressing block 41. In this way, it can be avoided that there is a gap between the covering film 110 and the filter housing 14 and dust leaks, thereby affecting the surrounding environment and the health of the workers. During this period, since the unfolded covering film 110 gradually decreases, the pressing block 41 will gradually move inward under the action of the elastic sheet 4, and the elastic sheet 4 will gradually return to its original state. After the covering film 110 is refolded, the folded covering film 110 will squeeze the pressing block 41 and make it move outward to reset, and the elastic sheet 4 will be deformed accordingly.

[0048] As Figure 13 and Figure 14As shown in the figure, it further includes a support mechanism. The support mechanism is arranged on the sealing plate 1401. The support mechanism includes a resisting block 5, a support block 51, a compression spring 52 and a guide rod 53. Two resisting blocks 5 are respectively fixedly connected to the left and right sides of the bottom of the sealing plate 1401. Guide rods 53 are fixedly connected to the left and right sides of the lower part of the installation box body 1. A support block 51 is slidably connected to the front side of the outer part of the guide rod 53. A compression spring 52 is fixedly connected between the support block 51 and the installation box body 1. The support block 51 is in extrusion fit with the resisting block 5, and the support block 51 is in contact fit with the filter housing 14.

[0049] When the worker pulls out components such as the sealing plate 1401 forward, the resisting block 5 will also move forward together with the sealing plate 1401. Without the restriction of the resisting block 5, the support block 51 will move forward under the action of the compression spring 52 until the compression spring 52 returns to its original state. At this time, the support block 51 can provide additional support for components such as the filter housing 14 that are being pulled out, so as to maintain the movement stability of components such as the filter housing 14. When components such as the filter housing 14 are completely pulled out and components such as the clamping frame 16 and the moving plate 17 have not been pulled out yet, the support effect of the support block 51 on components such as the filter housing 14 can prevent components such as the clamping frame 16 from shifting when being pulled out and colliding with components such as the installation box body 1 or even being damaged due to unstable manual support. When the worker moves the sealing plate 1401, the resisting block 5 and other components backward to reset, the resisting block 5 will contact and squeeze the support block 51, so that the support block 51 also moves backward to reset, and the compression spring 52 is immediately compressed.

[0050] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A fresh air filtering device with an easy-to-replace filter element, characterized in that: It includes an installation box body (1), a cover plate (11), a connection port (12), a fan (13), a filter housing (14), a sealing plate (1401), a filter element (1402), an opener (15), a clamping frame (16), a moving plate (17), a guiding block (18), a magnet (19) and a covering film (110). The installation box body (1) is installed with the cover plate (11) by bolts. The installation box body (1) is fixedly connected and communicated with a pair of connection ports (12). The installation box body (1) is fixedly connected with a pair of fans (13). The installation box body (1) is fixedly connected with a pair of openers (15). The installation box body (1) is slidably connected with the filter housing (14). The filter housing (14) is fixedly connected with the sealing plate (1401). The sealing plate (1401) is in contact and cooperation with the cover plate (11). The filter housing (14) is clamped with the filter element (1402). The filter housing (14) is slidably connected with the moving plate (17). A covering film (110) is fixedly connected between the moving plate (17) and the sealing plate (1401). The moving plate (17) is fixedly connected with a pair of clamping frames (16). The clamping frames (16) are in extrusion cooperation with the installation box body (1). The filter housing (14) is fixedly connected with the guiding block (18). The guiding block (18) is slidably connected with the moving plate (17). The guiding block (18) is fixedly connected with the magnet (19). The magnet (19) is in magnetic attraction cooperation with the moving plate (17).

2. The fresh air filtering device with a filter element that is easy to replace according to claim 1, characterized in that: The filter housing (14) is provided with a pair of longitudinally distributed strip-shaped slot holes therein.

3. The fresh air filtering device with an easily replaceable filter element as described in claim 2, characterized in that: One side of the clamping frame (16) is provided with a hemispherical elastic protrusion.

4. The fresh air filtering device with an easily replaceable filter element according to claim 3, characterized in that: It further includes a dust removal mechanism. The dust removal mechanism is arranged on the sealing plate (1401). The dust removal mechanism includes a mounting plate (2), an air pump (21), a collection box (22), a battery (23), a connecting pipe (24) and a suction plate (25). The mounting plate (2) is fixedly connected to the sealing plate (1401). The mounting plate (2) is fixedly connected with the air pump (21). The mounting plate (2) is clamped with the collection box (22). The air outlet of the air pump (21) is fixedly connected and communicated with the collection box (22) through a pipeline. The mounting plate (2) is clamped with the battery (23). The battery (23) is electrically connected to the air pump (21). The sealing plate (1401) is fixedly connected with a pair of suction plates (25). A connecting pipe (24) is fixedly connected and communicated between the pair of suction plates (25) and the air inlet of the air pump (21).

5. The fresh air filtering device with an easily replaceable filter element according to claim 4, wherein: The collection box (22) is fixedly connected with a pair of filter meshes therein.

6. The fresh air filtering device with an easily replaceable filter element according to claim 5, characterized in that: It further includes a wetting mechanism. The wetting mechanism is arranged on the sealing plate (1401). The wetting mechanism includes a liquid storage cylinder (3), a reel (31), a diversion pipe (32), a pressing ball (33), a sponge block (34), a liquid guide pipe (35) and a liquid pump (36). The reel (31) is rotatably connected to the sealing plate (1401). The reel (31) is fixedly connected with the liquid storage cylinder (3). The reel (31) is wound with a pair of liquid guide pipes (35). A diversion pipe (32) is fixedly connected and communicated between the pair of liquid guide pipes (35) and the liquid storage cylinder (3). The diversion pipe (32) is fixedly connected and communicated with a liquid pump (36). The liquid pump (36) is electrically connected to the battery (23). The liquid guide pipe (35) is fixedly connected with evenly distributed pressing balls (33). The pressing balls (33) are in extrusion fit with the covering film (110). A sponge block (34) is fixedly connected between the pair of clamping frames (16). The sponge block (34) is fixedly connected and communicated with the liquid guide pipe (35). The sponge block (34) is in contact fit with the filter housing (14).

7. The fresh air filtering device with an easily replaceable filter element according to claim 6, characterized in that: It further includes a fitting mechanism. The fitting mechanism is arranged on the clamping frame (16). The fitting mechanism includes an elastic sheet (4) and a pressing block (41). The elastic sheet (4) is fixedly connected to the clamping frame (16). The elastic sheet (4) is fixedly connected with the pressing block (41). The pressing block (41) is in extrusion fit with the covering film (110).

8. The fresh air filtering device with an easily replaceable filter element according to claim 7, characterized in that: It further includes a supporting mechanism. The supporting mechanism is arranged on the sealing plate (1401). The supporting mechanism includes a resisting block (5), a supporting block (51), a compression spring (52) and a guiding rod (53). The pair of resisting blocks (5) are both fixedly connected to the sealing plate (1401). The mounting box body (1) is fixedly connected with a pair of guiding rods (53). The guiding rod (53) is slidably connected with the supporting block (51). A compression spring (52) is fixedly connected between the supporting block (51) and the mounting box body (1). The supporting block (51) is in extrusion fit with the resisting block (5). The supporting block (51) is in contact fit with the filter housing (14).

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