A fresh air filtering device with easy filter element replacement

Abstract

The present invention discloses a fresh air filter device with an easy-to-replace filter element, and relates to the technical field of air filtration equipment. The present invention provides a fresh air filter device with an easy-to-replace filter element, comprising a mounting box, etc. The mounting box is provided with a cover plate by bolts, the mounting box is slidably connected to a filter housing, the filter housing is fixed with a sealing plate, the filter housing is clamped with a filter element, the filter housing is slidably connected to a movable plate, a covering film is fixed between the movable plate and the sealing plate, the movable plate is fixed with a pair of brackets, the filter housing is fixed with a guide block, and the guide block is fixed with a magnet. The present invention can wrap the filter housing during the process of replacing the filter element through components such as the bracket and the covering film, thereby preventing part of the dust on the surface of the filter housing and other components from falling off due to external disturbances and causing dust, thereby polluting the surrounding environment and affecting the health of workers, thereby improving the user experience.

Description

Technical Field

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

[0002] The fresh air filter is a key component installed in the fresh air system. It is mainly used to filter the air entering the room and remove pollutants such as dust, pollen, bacteria, viruses, and harmful gases, thereby providing fresh and healthy air indoors. Because the filter element gradually accumulates a large amount of pollutants during long-term use, the filtration efficiency gradually decreases and it is unable to effectively filter harmful substances in the air, resulting in poor indoor air quality and affecting people's health. Therefore, it is necessary to replace the filter element regularly. In addition, excessively dirty filter elements will increase the operating resistance of the fresh air system, increase the system's energy consumption, and shorten the service life of the equipment.

[0003] When replacing the filter element in the existing fresh air filter 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 filter device, some of the dust on the surface of the filter element will inevitably fall off due to external disturbance and cause dust, which will pollute the surrounding environment and affect the health of the workers, resulting in a poor user experience.

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

[0005] In order to overcome the shortcomings of the existing fresh air filter device in which some dust on the surface of the filter element will inevitably fall off due to external disturbance when being replaced and cause dust, thereby polluting the surrounding environment and affecting the health of workers, resulting in poor user experience, the present invention provides a fresh air filter device with good user experience and easy replacement of filter elements.

[0006] A fresh air filtering device that is easy to replace the filter element includes an installation box, a cover plate, a connecting port, a fan, a filter housing, a sealing plate, a filter element, an opener and closeer, a bracket, a movable plate, a guide block, a magnet and a covering film. The installation box is installed with a cover plate by bolts, the installation box is fixedly connected and communicated with a pair of connecting ports, the installation box is fixedly connected with a pair of fans, the installation box is fixedly connected with a pair of openers, the installation box is slidably connected with the filter housing, the filter housing is fixedly connected with a sealing plate, the sealing plate is in contact with the cover plate, the filter housing is clamped with the filter element, the filter housing is slidably connected with the movable plate, the covering film is fixed between the movable plate and the sealing plate, the movable plate is fixedly connected with a pair of brackets, the brackets are squeezed and matched with the installation box, the filter housing is fixedly connected with the guide block, the guide block is slidably connected to the movable plate, the guide block is fixedly connected with a magnet, and the magnet is magnetically matched with the movable plate.

[0007] As a preferred technical solution of the present invention, the filter housing is provided with pairs of longitudinally distributed strip slots.

[0008] As a preferred technical solution of the present invention, a hemispherical elastic protrusion is provided on one side of the card holder.

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

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

[0011] As a preferred technical solution of the present invention, it also includes a wetting mechanism, which is arranged on the sealing plate. The wetting mechanism includes a liquid storage cylinder, a reel, a guide tube, a pressure ball, a sponge block, a liquid guide tube and a liquid pump. The reel is rotatably connected to the sealing plate, the reel is fixedly connected to the liquid storage cylinder, the reel is wound with a pair of liquid guide tubes, the paired liquid guide tubes are fixedly connected to the liquid storage cylinder and connected with the guide tube, the guide tube is fixedly connected and connected with the liquid pump, the liquid pump is electrically connected to the battery, the liquid guide tube is fixedly connected with evenly distributed pressure balls, the pressure balls are squeezed and matched with the covering film, the sponge blocks are fixedly connected between the paired card racks, the sponge blocks are fixedly connected to the liquid guide tubes and connected, and the sponge blocks are in contact with the filter housing.

[0012] As a preferred technical solution of the present invention, it also includes a fitting mechanism, which is arranged on the card frame and includes a spring and a pressure block. The spring is fixed to the card frame, and the spring is fixed to the pressure block, which is squeezed and matched with the covering film.

[0013] As a preferred technical solution of the present invention, it also includes a support mechanism, which is arranged on the sealing plate. The support mechanism includes a stop block, a support block, a compression spring and a guide rod. The pairs of stop blocks are fixed to the sealing plate, the mounting box is fixed with a pair of guide rods, the guide rods are slidably connected with the support block, a compression spring is fixed between the support block and the mounting box, the support block and the stop block are squeezed together, and the support block is in contact with the filter housing.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention can wrap the filter housing during the replacement of the filter element through components such as the bracket and the covering film, thereby preventing some dust on the surface of the filter housing and other components from falling off due to external disturbance and causing dust, thereby polluting the surrounding environment and affecting the health of workers, thereby improving the user experience and the practicality of this fresh air filtration device.

[0015] 2. The present invention can absorb dust that falls off from the surface of the filter housing and other components due to external disturbances through components such as the air pump and the suction plate, thereby preventing the falling dust from causing dust to leak outward, thereby polluting the surrounding environment and affecting the health of workers, thereby improving the practicality of this fresh air filtration device.

[0016] 3. The present invention uses components such as a liquid pump and a sponge block to not only humidify the surface of the filter housing, thereby reducing the generation of dust, but also allows the covering film to fit the filter housing, thereby preventing the generated dust from leaking outward and affecting the surrounding environment and the health of workers, thereby improving the practicality of this fresh air filtration device.

[0017] 4. The present invention uses components such as pressing balls and pressing blocks to keep the covering membrane and the filter housing in close contact, thereby avoiding the presence of a gap between the covering membrane and the filter housing and causing dust leakage, which in turn affects the surrounding environment and the health of workers, thereby improving the practicality of this fresh air filtration device.

[0018] 5. The present invention can provide additional support for the pulled-out filter housing and other components through components such as the stop block and the support block, thereby preventing the bracket and other components from being offset when being pulled out and colliding with the installation box and other components or even being damaged due to insufficient stability of manual support, thereby improving the practicality and stability of the fresh air filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the installation box, cover plate, connection port and other components of the present invention.

[0021] Figure 3It is a schematic diagram of the three-dimensional structure of the connection port, fan, filter housing and other components of the present invention.

[0022] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the filter housing, sealing plate, filter element and other components of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable plate, guide block, magnet and other components of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide block, magnet, covering film and other components of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the components such as the card frame, movable plate and covering film of the present invention.

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

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the battery, connecting tube, suction plate and other components of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the liquid storage cylinder, reel, guide tube and other components of the present invention.

[0029] Figure 11 The figure is a schematic diagram of the three-dimensional structure of the components such as the pressure ball, sponge block and catheter of the present invention.

[0030] Figure 12 It is a schematic diagram of the three-dimensional structure of the components such as the spring piece, the pressing block and the bracket of the present invention.

[0031] Figure 13 It is a schematic diagram of the three-dimensional structure of the components such as the stop block, support block and compression spring of the present invention.

[0032] Figure 14 It is a schematic diagram of the three-dimensional structure of the support block, compression spring, guide rod and other components of the present invention.

[0033] Among them: 1. Installation box, 11. Cover plate, 12. Connection port, 13. Fan, 14. Filter housing, 1401. Sealing plate, 1402. Filter element, 15. Opener and closer, 16. Card holder, 17. Moving plate, 18. Guide block, 19. Magnet, 110. Covering film, 2. Installation plate, 21. Air pump, 22. Collection box, 23. Battery, 24. Connecting pipe, 25. Suction plate, 3. Liquid storage cylinder, 31. Reel, 32. Guide pipe, 33. Pressure ball, 34. Sponge block, 35. Liquid guide pipe, 36. Liquid pump, 4. Shrapnel, 41. Pressure block, 5. Abutment block, 51. Support block, 52. Compression spring, 53. Guide rod. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] A fresh air filtering device with easy filter element replacement, such as Figure 1-Figure 7 As shown, it includes an installation box 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 and closer 15, a bracket 16, a movable plate 17, a guide block 18, a magnet 19 and a covering film 110. The cover plate 11 is installed on the middle part of the front side of the installation box 1 by bolts, and the front and rear parts on the left and right sides of the installation box 1 are fixedly connected and connected with the connection port 12. The fan 13 is fixedly connected to the left and right parts of the rear side of the installation box 1, and the opener and closer 15 is fixedly connected to the left and right parts of the front side of the installation box 1. The filter housing 14 is slidably connected to the inside of the installation box 1. A sealing plate 1401 is fixedly connected to the front side of the body 14, and the sealing plate 1401 is in contact with the cover plate 11. A filter element 1402 is clamped inside the filter housing 14, and a movable plate 17 is slidably connected to the front side of the outside of the filter housing 14. A covering film 110 is fixedly connected between the movable plate 17 and the sealing plate 1401. The upper and lower parts of the left and right sides of the movable plate 17 are fixedly connected with a bracket 16, and the bracket 16 is squeezed and fitted with the mounting box 1. A guide block 18 is fixedly connected to the top of the filter housing 14, and the guide block 18 is slidably connected to the movable plate 17. A magnet 19 is fixedly connected to the rear side of the guide block 18, and the magnet 19 is magnetically fitted with the movable plate 17.

[0037] like Figure 2-Figure 6 As shown, the filter housing 14 is provided with strip-shaped slots distributed longitudinally in the front and rear directions on both the left and right sides.

[0038] like Figure 7 As shown, a hemispherical elastic protrusion is provided at the lower rear side of the card holder 16.

[0039] When workers need to filter the fresh air, they can first fix the installation box 1 and other components to the indoor ceiling with bolts and connect the connection port 12 to the corresponding ventilation duct. Then, they can control the flow of air through the fan 13 and the opener 15 and other components 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 1, and then pull out the filter housing 14, the sealing plate 1401 and the filter element 1402 and replace them. That is, during this period, the guide block 18 and the magnet 19 will move forward with the filter housing 14 and other components, while the bracket 16 and the movable plate 17 will not be able to move forward due to the restriction of the installation box 1 and the elastic protrusion. At this time, the sealing plate 1401 and other components will move relative to the movable plate 17, so that the covering film 110 in the folded state will gradually unfold and wrap the extracted part of the filter housing 14. When the rear end of the filter housing 14 moves forward to the front end of the installation box 1, the covering film 110 has been fully unfolded and has completed the filter housing 14 and other components. The filter housing 14 is wrapped, and the magnet 19 has also moved forward to contact with the movable plate 17 and be adsorbed and fixed together, so that the filter housing 14 can be wrapped during the process of replacing the filter element 1402, thereby preventing some dust on the surface of the filter housing 14 and other components from falling off due to external disturbances and causing dust, thereby polluting the surrounding environment and affecting the health of workers. When the worker continues to move the filter housing 14 and the magnet 19 and other components forward, the magnet 19 will forcibly squeeze and drive the movable plate 17 and the bracket 16 to move forward, and the elastic force on the bracket 16 will cause the filter housing 14 to be wrapped. The protrusion will also be deformed and separated from the mounting box 1, so that the filter housing 14 and other components can be pulled out from the mounting box 1. After the filter housing 14 and other components are pulled out, the magnet 19 is adsorbed and fixed to the movable plate 17, so the covering film 110 will remain taut and continue to wrap the filter housing 14 and other components. After cleaning and replacing the filter element 1402 and other components, the worker can first move the filter housing 14 and other components backward to reset and restore them to their original state, and then install the cover plate 11 back to the mounting box 1 with bolts.

[0040] Example 2

[0041] On the basis of Example 1, Figure 8 and Figure 9As shown, it also includes a dust removal mechanism, which is arranged on the sealing plate 1401. The dust removal mechanism includes a mounting plate 2, an air pump 21, a collecting box 22, a battery 23, a connecting pipe 24 and a suction plate 25. The mounting plate 2 is fixed to the bottom of the sealing plate 1401, the air pump 21 is fixed to the left part of the mounting plate 2, and the collecting box 22 is clamped on the bottom of the mounting plate 2. The air outlet of the air pump 21 is fixedly connected to the collecting box 22 through a pipeline and is connected. The battery 23 is clamped on the right part of the mounting plate 2, and the battery 23 is electrically connected to the air pump 21. The left and right parts of the rear side of the sealing plate 1401 are fixedly connected with suction plates 25, and the left and right suction plates 25 are fixedly connected to the air inlet of the air pump 21 and are connected with a connecting pipe 24.

[0042] like Figure 8 and Figure 9 As shown, filter screens are fixedly connected to both the left and right sides of the collecting box 22.

[0043] When the worker moves the filter housing 14 and other components forward, the air pump 21 can also be started. The air pump 21 will absorb the dust that falls off from the surface of the filter housing 14 and other components due to external disturbances through the connecting pipe 24 and the suction plate 25 and collect it in the collection box 22. This can prevent the fallen dust from causing dust to leak out, thereby polluting the surrounding environment and affecting the health of the workers. When the worker completely pulls out the filter housing 14 and other components, the air pump 21 can be turned off. The dust and other impurities collected in the collection box 22 need to be cleaned regularly, and the main function of the battery 23 is to power the air pump 21.

[0044] like Figure 10 and Figure 11 As shown, it also includes a wetting mechanism, which is arranged on the sealing plate 1401. The wetting mechanism includes a liquid storage cylinder 3, a reel 31, a guide tube 32, a pressure ball 33, a sponge block 34, a liquid guide tube 35 and a liquid pump 36. The reel 31 is rotatably connected to the middle of the sealing plate 1401, and the liquid storage cylinder 3 is fixedly connected to the front side of the reel 31. Two liquid guide tubes 35 are wound around the middle of the reel 31. The two liquid guide tubes 35 are fixedly connected to the liquid storage cylinder 3 and connected to the guide tube 32. The middle of the guide tube 32 is fixedly connected and connected to the liquid pump 36. The liquid pump 36 is electrically connected to the battery 23. The outside of the liquid guide tube 35 is fixedly connected to evenly distributed pressure balls 33. The pressure balls 33 are squeezed and matched with the covering film 110. A sponge block 34 is fixedly connected between the bottoms of the two card frames 16 on the same side. The sponge block 34 is fixedly connected and connected to the adjacent liquid guide tube 35, and the sponge block 34 is in contact with the filter housing 14.

[0045] When the filter housing 14 and other components move forward and slide relative to the movable plate 17 and other components, the reel 31 and other components will move forward with the sealing plate 1401, and the sponge block 34 will remain stationary with the bracket 16. Therefore, the reel 31 and other components will move relative to the sponge block 34, and the liquid guide tube 35 will be gradually pulled out and drive the reel 31 and other components to rotate forward, and the pulled-out part of the liquid guide tube 35 will contact the outside of the covering film 110, and the pressure ball 33 outside the liquid guide tube 35 will squeeze the covering film 110 and make it fit as close to the filter housing 14 as possible. During this period, the worker can also start the liquid pump 36, which will pass through the guide tube 32 and the liquid guide tube 35 The water in the liquid storage cylinder 3 is injected into the sponge block 34. 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. The humidified filter housing 14 can also better fit with the covering film 110, thereby avoiding the leakage of dust caused and affecting the surrounding environment and the health of workers. When the filter housing 14 and other components are completely extracted, the liquid pump 36 can be turned off. When the worker moves the filter housing 14 and other components backward to reset and restore them to their original state, it is also necessary to rotate the reel 31 and other components in the opposite direction and rewind the liquid guide tube 35.

[0046] like Figure 2 and Figure 12 As shown, it also includes a fitting mechanism, which is arranged on the card frame 16. The fitting mechanism includes a spring piece 4 and a pressure block 41. The spring piece 4 is fixed to the front side of the card frame 16. The front end of the spring piece 4 is fixed to the pressure block 41. The pressure block 41 is squeezed and matched with the covering film 110.

[0047] When the sealing plate 1401 and other components slide relative to the movable plate 17 and the covering film 110 is gradually unfolded, the pressure block 41 will squeeze the covering film 110 under the action of the spring piece 4. Therefore, the gradually unfolded part of the covering film 110 will remain tight and close to the filter housing 14 under the squeezing and pulling of the pressure block 41, thereby avoiding the gap between the covering film 110 and the filter housing 14 and causing dust leakage, which in turn affects the surrounding environment and the health of the workers. During this period, since the unfolded covering film 110 gradually becomes less, the pressure block 41 will gradually move inward under the action of the spring piece 4, and the spring piece 4 will gradually return to its original shape. When the covering film 110 is folded again, the folded covering film 110 will squeeze the pressure block 41 and move it outward to reset, and the spring piece 4 will then deform.

[0048] like Figure 13 and Figure 14As shown, it also includes a supporting mechanism, which is arranged on the sealing plate 1401. The supporting mechanism includes a stop block 5, a support block 51, a compression spring 52 and a guide rod 53. The two stop blocks 5 are respectively fixed to the left and right sides of the bottom of the sealing plate 1401, and the left and right sides of the lower part of the installation box 1 are fixed with guide rods 53. The outer front side of the guide rod 53 is slidably connected with the support block 51. A compression spring 52 is fixed between the support block 51 and the installation box 1. The support block 51 is squeezed and matched with the stop block 5, and the support block 51 is in contact with the filter housing 14.

[0049] When the worker pulls out the sealing plate 1401 and other components forward, the block 5 will also move forward with the sealing plate 1401, and 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 without the restriction of the block 5. At this time, the support block 51 can provide additional support for the filter housing 14 and other components that have been pulled out, thereby maintaining the movement stability of the filter housing 14 and other components. When the filter housing 14 and other components are completely pulled out and the bracket 16 and the movable plate 17 have not yet been pulled out, the support effect of the support block 51 on the filter housing 14 and other components can prevent the bracket 16 and other components from being offset when being pulled out due to insufficient manual support and colliding with the installation box 1 and other components or even being damaged. When the worker moves the sealing plate 1401 and the block 5 and other components backward to reset, the 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 description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A fresh air filtering device with an easy-to-replace filter element, characterized by: The invention comprises an installation box (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 bracket (16), a movable plate (17), a guide block (18), a magnet (19) and a covering film (110), wherein the installation box (1) is fixed with the cover plate (11) by bolts, the installation box (1) is fixedly connected to and communicates with a pair of connection ports (12), the installation box (1) is fixedly connected to a pair of fans (13), the installation box (1) is fixedly connected to a pair of openers (15), the installation box (1) is slidably connected to the filter housing (14), the filter housing (14) is fixedly connected to the sealing plate (1401), the sealing plate (1401) and the filter housing (14) are fixedly connected. The cover plate (11) is in contact with each other, the filter housing (14) is clamped with a filter element (1402), the filter housing (14) is slidably connected to a movable plate (17), a covering film (110) is fixed between the movable plate (17) and the sealing plate (1401), the movable plate (17) is fixed with a pair of brackets (16), the brackets (16) and the mounting box (1) are squeezed and matched, the filter housing (14) is fixed with a guide block (18), the guide block (18) is slidably connected to the movable plate (17), the guide block (18) is fixed with a magnet (19), the magnet (19) and the movable plate (17) are magnetically matched, and a dust removal mechanism is also included, the dust removal mechanism is arranged on the sealing plate (1401), and the dust removal mechanism includes a mounting plate (2), an air pump (21), a collecting The collecting box (22), the battery (23), the connecting pipe (24) and the suction plate (25) are fixed to the sealing plate (1401). The installing plate (2) is fixed to the air pump (21). The installing plate (2) is clamped with the collecting box (22). The air outlet of the air pump (21) and the collecting box (22) are fixedly connected and communicated through a pipeline. The installing plate (2) is clamped with the battery (23). The battery (23) and the air pump (21) are electrically connected. The sealing plate (1401) is fixed with a pair of suction plates (25). The pair of suction plates (25) and the air inlet of the air pump (21) are fixedly connected and communicated with the connecting pipe (24). The wetting mechanism is also included. The wetting mechanism is arranged on the sealing plate (1401). The wetting mechanism includes a liquid storage cylinder (3), a reel (31), a guide The flow tube (32), the pressure ball (33), the sponge block (34), the liquid guide tube (35) and the liquid pump (36), the reel (31) is rotatably connected to the sealing plate (1401), the reel (31) is fixedly connected to the liquid storage cylinder (3), the reel (31) is wound with a pair of liquid guide tubes (35), the pair of liquid guide tubes (35) and the liquid storage cylinder (3) are fixedly connected and communicated with the flow guide tube (32), the flow guide tube (32) is fixedly connected and communicated with the liquid pump (36), the liquid pump (36) is electrically connected to the battery (23), the liquid guide tube (35) is fixedly connected with the uniformly distributed pressure balls (33), the pressure balls (33) are squeezed and matched with the covering film (110), the sponge block (34) is fixedly connected between the pair of card frames (16), the sponge block (34) and the liquid guide tube (35) are fixedly connected and communicated,The sponge block (34) is in contact with the filter housing (14).

2. The fresh air filtering device with easily replaceable filter element according to claim 1, characterized in that: The filter housing (14) is provided with strip-shaped slots distributed in pairs longitudinally.

3. The fresh air filtering device with easily replaceable filter element according to claim 2, characterized in that: A hemispherical elastic protrusion is provided on one side of the card frame (16).

4. A fresh air filtering device with easily replaceable filter element according to claim 3, characterized in that: The collecting box (22) is fixed with a pair of filter screens.

5. The fresh air filtering device with easily replaceable filter element according to claim 4, characterized in that: The laminating mechanism is also included, and the laminating mechanism is arranged on the card frame (16). The laminating mechanism includes a spring piece (4) and a pressing block (41). The spring piece (4) is fixed to the card frame (16). The spring piece (4) is fixed to the pressing block (41). The pressing block (41) is extruded and matched with the covering film (110).

6. The fresh air filtering device with easily replaceable filter element according to claim 5, characterized in that: The invention also includes a supporting mechanism, which is arranged on the sealing plate (1401). The supporting mechanism includes a stopper (5), a support block (51), a compression spring (52) and a guide rod (53). The paired stoppers (5) are fixed to the sealing plate (1401). The mounting box (1) is fixed with a pair of guide rods (53). The guide rods (53) are slidably connected to the supporting block (51). A compression spring (52) is fixed between the supporting block (51) and the mounting box (1). The supporting block (51) is squeeze-fitted with the stopper (5), and the supporting block (51) is in contact with the filter housing (14).

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