Filtering device for heating and ventilation engineering

Abstract

The invention relates to the technical field of heating and ventilation engineering, and discloses a filtering device for heating and ventilation engineering, which comprises a fixed top plate, a ventilation pipeline is arranged at the bottom of the fixed top plate, and a filtering frame is arranged in the ventilation pipeline; the fixing mechanism is located at the bottom of the fixed top plate and used for installation between the fixed top plate and the ventilation pipeline; the dismounting mechanism is located in the ventilation pipeline and used for mounting and dismounting the filtering frame; and the sealing mechanism is located in the ventilation pipeline and used for taking out the filtering frame. Through the ingenious design of the dismounting mechanism, the mounting and dismounting of the filter frame become rapid, simple and convenient, and the rotating handle controls the rotating screw rod and drives the clamping frame to move, so that the clamping or loosening of the filter frame is realized, the working intensity of operators is reduced, the maintenance efficiency is improved, the downtime is reduced, and the working efficiency is improved. And normal operation of the heating and ventilation system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of heating and ventilation engineering, in particular to a filtering device used in heating and ventilation engineering. Background Art

[0002] As people's demands for indoor environmental quality continue to rise, HVAC engineering plays a vital role in the construction industry. HVAC systems provide a comfortable living and working environment by regulating indoor temperature, humidity, and air circulation. However, during HVAC system operation, impurities such as dust, particulate matter, and microorganisms in the air can continuously enter the system through air circulation, causing a series of problems.

[0003] After searching, the Chinese patent number CN222012190U discloses that the utility model discloses a fresh air filter device for HVAC engineering, comprising: a filter mechanism and a disassembly mechanism; the filter mechanism comprises a shell, the interior of the shell is embedded with an activated carbon filter screen by screws, one side of the shell is fixedly connected to a connecting pipe, one end of the connecting pipe is connected to the shell; the disassembly mechanism comprises a cylinder fixedly connected to the inner side wall of the connecting pipe and a movable rod slidably connected to the inside of the connecting pipe; the fresh air filter device for HVAC engineering is provided with the filter mechanism and the disassembly mechanism, so that after the connecting pipe is inserted into the fresh air inlet pipe of the HVAC equipment, the movable rod can drive the pushing block to squeeze the connecting block under the action of the second spring, so that the support plate can drive the two clamping blocks to press the inner wall of the fresh air inlet pipe under the action of the connecting block; through the above arrangement, the filter device can be quickly disassembled and assembled on the fresh air inlet pipe of the HVAC equipment, thereby improving the work efficiency during the installation of the filter device.

[0004] However, in existing HVAC projects, the filter frame of the filter device is inconvenient to install and disassemble, usually requiring the use of professional tools and consuming a lot of time and manpower, resulting in low maintenance efficiency, increased downtime, and affecting the normal operation of the HVAC system. Based on this, the present invention designs a filter device for HVAC projects to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a filtering device for HVAC engineering, which solves the problem of inconvenient disassembly in the background art.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A filtering device for HVAC engineering, comprising: A fixed top plate is provided at the bottom of the fixed top plate, and a filter frame is provided inside the ventilation duct.

[0007] The fixing mechanism is located at the bottom of the fixed top plate and is used for installation between the fixed top plate and the ventilation duct.

[0008] The disassembly mechanism is located inside the ventilation duct and is used for installing and disassembling the filter frame. The disassembly mechanism includes a rotating assembly and a clamping assembly. The rotating assembly includes a clamping assembly installed inside the ventilation duct and used to move the position of the clamping assembly. The clamping assembly is located inside the ventilation duct and is used to fix the position of the filter frame.

[0009] A sealing mechanism is located inside the ventilation duct and is used for removing the filter frame.

[0010] Preferably, the rotating assembly includes a rotating screw installed inside the ventilation duct, a rotating handle is installed on one side of the rotating screw, a clamping frame is installed on one side of the rotating screw, the rotating screw and the clamping frame are each provided in two groups and are symmetrically distributed, and a telescopic assembly is installed between the ventilation duct and the clamping frame.

[0011] Preferably, the clamping assembly includes an extrusion telescopic rod installed at the top and bottom of the inner cavity of the clamping frame, the top and bottom of the inner cavity of the clamping frame are hinged with a clamping plate, the outer ring of the extrusion telescopic rod is installed with an extrusion spring, and an extrusion plate is installed on one side of the extrusion spring and the extrusion telescopic rod, and the extrusion plate is located at the end of the clamping plate.

[0012] Preferably, the telescopic assembly includes position-limiting telescopic rods installed between the ventilation duct and the clamping frame, and the position-limiting telescopic rods are provided in four groups and distributed in a rectangular array.

[0013] Through the above technical solution, it can be seen that: when the filter frame needs to be replaced, the operator first rotates the rotating handle clockwise, and the rotating handle drives the rotating screw to rotate. Due to the threaded connection relationship between the clamping frame and the rotating screw, the clamping frame moves toward the center along the axial direction of the limiting telescopic rod under the limiting action of the limiting telescopic rod; the extrusion telescopic rods at the top and bottom of the inner cavity of the clamping frame are compressed, and the extrusion springs on their outer rings generate elastic force, pushing the extrusion plate toward the end of the clamping plate. The clamping plate is retracted toward the center under the extrusion action, thereby clamping the filter frame.

[0014] Preferably, the fixing mechanism includes a fixed frame installed at the bottom of the fixed top plate, a servo motor is installed on one side of the fixed frame, a first bidirectional screw is installed on one side of the servo motor output shaft, a second bidirectional screw is installed inside the fixed frame, a tensioning wheel is installed on one side of the first bidirectional screw and the second bidirectional screw, the tensioning wheels are connected by a rotating belt, the outer rings of the first bidirectional screw and the second bidirectional screw are threadedly connected to moving blocks, the moving blocks are provided in four groups and distributed in a rectangular array, a clamping assembly is installed on one side of the moving block, and a limiting assembly is installed inside the fixed frame.

[0015] Preferably, the snap-in assembly includes a snap-in block installed on one side of the moving block, and snap-in slots are provided on both sides of the ventilation duct. The snap-in block slides inside the snap-in slots. The snap-in blocks are provided in four groups and distributed in a rectangular array, and the snap-in slots are provided in four groups and distributed in a rectangular array.

[0016] Through the above technical solution, it can be seen that: when the entire filter device needs to be disassembled as a whole, the servo motor is reversed to drive the first bidirectional screw and the second bidirectional screw to rotate in the opposite direction. Under the action of the reverse rotation of the bidirectional screw, the moving block drives the clamping block to withdraw from the clamping groove on the side wall of the ventilation duct, and the ventilation duct and the fixed top plate can be easily separated.

[0017] Preferably, the limiting assembly includes limiting rods installed inside the fixed frame, and the limiting rods are provided in multiple groups and are symmetrically distributed. The limiting rods are inserted into the interior of the moving block.

[0018] Preferably, the sealing mechanism includes a groove opened inside the ventilation duct, the top and bottom of the inner cavity of the groove are both installed with mounting telescopic rods, the outer ring of the mounting telescopic rod is installed with a mounting spring, one side of the mounting telescopic rod and the mounting spring is installed with a sealing plate, the front of the sealing plate is installed with a connecting plate, and the mounting telescopic rods and the mounting springs are both provided in multiple groups and distributed in a rectangular array.

[0019] Preferably, an activated carbon plate is installed inside the filter frame, and a microporous structure is provided inside the activated carbon plate. The microporous structure is provided in multiple groups and distributed in a rectangular array.

[0020] Through the above technical solution, it can be seen that: when the HVAC system is operating normally, the air flows in the ventilation duct. When the air flows through the ventilation duct, it will first come into contact with the activated carbon plate inside the filter frame. The activated carbon plate has a rich and rectangular array of microporous structures inside. These microporous structures have strong adsorption capacity and can efficiently absorb various pollutants such as dust, particulate matter, microorganisms, etc. in the air.

[0021] Preferably, the fixed top plate is provided with mounting screw holes, the internal threads of the mounting screw holes are connected with mounting screw rods, the mounting screw holes are provided in four groups and distributed in a rectangular array, and the mounting screw rods are provided in four groups and distributed in a rectangular array.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the ingenious design of the disassembly mechanism makes the installation and disassembly of the filter frame quick and easy. By turning the handle to control the rotating screw, the clamping frame is driven to move, thereby clamping or loosening the filter frame, thereby reducing the workload of the operator, improving maintenance efficiency, reducing downtime, and ensuring the normal operation of the HVAC system.

[0023] 2. In the present invention, a rigid connection is achieved between the fixed top plate and the ventilation duct through the design of the fixing mechanism, which greatly improves the stability of the filtering device during the operation of the HVAC system, ensures the stable performance of the filtering effect, reduces the possibility of equipment vibration and displacement, and thus extends the service life of the equipment.

[0024] 3. In the present invention, the sealing mechanism can quickly form a closed surface the moment the filter frame is taken out, thereby avoiding leakage of airflow from the gaps generated after the filter frame is taken out, and ensuring the stability of the airflow inside the ventilation duct and the integrity of the filtering effect; when the filter frame needs to be reinstalled, the sealing mechanism can automatically release the sealing state, which is easy to operate and does not require additional manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 It is a bottom view structural schematic diagram of the present invention; Figure 4 It is a side structural schematic diagram of the present invention; Figure 5 This is a front view of the disassembly mechanism structure of the present invention; Figure 6 It is a side view of the local structure of the present invention; Figure 7 This is a front view of the sealing mechanism structure of the present invention; Figure 8 This is a structural diagram of the activated carbon board of the present invention.

[0026] Among them: 1. Fixed top plate; 2. Ventilation duct; 3. Filter frame; 4. Rotating screw; 5. Rotating handle; 6. Clamping frame; 7. Extrusion telescopic rod; 8. Clamping plate; 9. Extrusion spring; 10. Extrusion plate; 11. Limiting telescopic rod; 12. Fixed frame; 13. Servo motor; 14. First bidirectional screw; 15. Second bidirectional screw; 16. Tensioner; 17. Moving block; 18. Clamping block; 19. Slot; 20. Limiting rod; 21. Groove; 22. Installing telescopic rod; 23. Installing spring; 24. Sealing plate; 25. Connecting plate; 26. Activated carbon plate; 27. Microporous structure; 28. Installing screw hole; 29. ​​Installing screw. DETAILED DESCRIPTION

[0027] 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.

[0028] Example 1 See also Figures 1-8 A filtering device for HVAC engineering includes: a fixed top plate 1, a ventilation duct 2 is provided at the bottom of the fixed top plate 1, and a filter frame 3 is provided inside the ventilation duct 2; a fixing mechanism, the fixing mechanism is located at the bottom of the fixed top plate 1 and is used for the installation between the fixed top plate 1 and the ventilation duct 2; a disassembly mechanism, the disassembly mechanism is located inside the ventilation duct 2 and is used for the installation and disassembly of the filter frame 3, the disassembly mechanism includes a rotating component and a clamping component, the rotating component includes a component installed inside the ventilation duct 2 and used to move the position of the clamping component, the clamping component is located inside the ventilation duct 2 and is used to fix the position of the filter frame 3; a sealing mechanism, the sealing mechanism is located inside the ventilation duct 2 and is used for removing the filter frame 3.

[0029] The rotating assembly includes a rotating screw 4 installed inside the ventilation duct 2. A rotating handle 5 is installed on one side of the rotating screw 4. A clamping frame 6 is installed on one side of the rotating screw 4. There are two sets of rotating screws 4 and clamping frames 6, and they are symmetrically distributed. A telescopic assembly is installed between the ventilation duct 2 and the clamping frame 6. The clamping assembly includes extrusion telescopic rods 7 installed at the top and bottom of the inner cavity of the clamping frame 6. The top and bottom of the inner cavity of the clamping frame 6 are hinged to clamping plates 8. The outer ring of the extrusion telescopic rod 7 is installed with an extrusion spring 9. An extrusion plate 10 is installed between the extrusion spring 9 and one side of the extrusion telescopic rod 7. The extrusion plate 10 is located at the end of the clamping plate 8. The telescopic assembly includes a limiting telescopic rod 11 installed between the ventilation duct 2 and the clamping frame 6. There are four sets of limiting telescopic rods 11, and they are distributed in a rectangular array.

[0030] The working principle of the embodiment of the present invention is: the operator first rotates the rotating handle 5 clockwise, and the rotating handle 5 drives the rotating screw 4 to rotate. Due to the threaded connection relationship between the clamping frame 6 and the rotating screw 4, the clamping frame 6 moves toward the center along the axial direction of the limiting telescopic rod 11 under the limiting action of the limiting telescopic rod 11; the extrusion telescopic rod 7 at the top and bottom of the inner cavity of the clamping frame 6 is compressed, and the extrusion spring 9 on its outer ring generates elastic force, pushing the extrusion plate 10 to move toward the end direction of the clamping plate 8. The clamping plate 8 is retracted toward the center under the extrusion action, thereby clamping the filter frame 3.

[0031] Example 2 See also Figures 1-8 In the embodiment of the present invention, the fixing mechanism includes a fixed frame 12 installed at the bottom of the fixed top plate 1, a servo motor 13 is installed on one side of the fixed frame 12, a first bidirectional screw rod 14 is installed on one side of the output shaft of the servo motor 13, a second bidirectional screw rod 15 is installed inside the fixed frame 12, and a tensioning pulley 16 is installed on one side of the first bidirectional screw rod 14 and the second bidirectional screw rod 15. The tensioning pulleys 16 are connected by a rotating belt, and the outer rings of the first bidirectional screw rod 14 and the second bidirectional screw rod 15 are threadedly connected to a moving block 17. The moving blocks 17 are provided in four groups and distributed in a rectangular array. A clamping assembly is installed on one side of the moving block 17, and a limiting assembly is installed inside the fixed frame 12.

[0032] The clamping assembly includes a clamping block 18 mounted on one side of the movable block 17. Slots 19 are provided on both sides of the ventilation duct 2. The clamping blocks 18 slide within the slots 19. There are four sets of clamping blocks 18 arranged in a rectangular array, and four sets of slots 19 are provided in a rectangular array. The limiting assembly includes limiting rods 20 mounted within the fixed frame 12. There are multiple sets of limiting rods 20 symmetrically distributed, and the limiting rods 20 extend through the interior of the movable block 17.

[0033] The operating principle of this embodiment of the present invention is as follows: servo motor 13 is activated, and its output shaft drives first bidirectional screw 14 to rotate. This, in turn, is driven by tensioner 16 and the rotating belt, which in turn drives second bidirectional screw 15 to rotate. As the bidirectional screw rotates, movable block 17, constrained by limit rod 20, moves toward the center along the axial direction of limit rod 20. This movable block 17 drives engaging block 18 to insert into slot 19 in the side wall of ventilation duct 2, achieving a rigid connection between fixed top plate 1 and ventilation duct 2.

[0034] Example 3 See also Figures 1-8In the embodiment of the present invention, the sealing mechanism includes a groove 21 opened inside the ventilation duct 2, and the top and bottom of the inner cavity of the groove 21 are both installed with mounting telescopic rods 22, and the outer ring of the mounting telescopic rod 22 is installed with a mounting spring 23. A sealing plate 24 is installed on one side of the mounting telescopic rod 22 and the mounting spring 23, and a connecting plate 25 is installed on the front of the sealing plate 24. The mounting telescopic rods 22 and the mounting springs 23 are both provided in multiple groups and distributed in a rectangular array.

[0035] An activated carbon plate 26 is mounted within the filter frame 3. Microporous structures 27 are arranged in multiple groups arranged in a rectangular array. Mounting screw holes 28 are located within the fixed top plate 1. Mounting screw rods 29 are threadedly connected to the mounting screw holes 28. Four mounting screw holes 28 are arranged in a rectangular array, and four mounting screw rods 29 are arranged in a rectangular array.

[0036] The working principle of the embodiment of the present invention is: when air flows through the ventilation duct 2, it will first come into contact with the activated carbon plate 26 inside the filter frame 3. The activated carbon plate 26 has a rich and rectangular array of microporous structures 27 inside. These microporous structures 27 have strong adsorption capacity and can efficiently adsorb various pollutants such as dust, particulate matter, microorganisms, etc. in the air.

[0037] Working Principle: First, securely fasten the fixed top plate 1 to the building structure using the mounting screws 29. Next, activate the servo motor 13. The output shaft of the servo motor 13 rotates the first bidirectional screw 14, which, through the transmission action of the tensioner 16 and the rotating belt, synchronously rotates the second bidirectional screw 15. Under the rotation of the first and second bidirectional screws 14 and 15, the movable block 17, constrained by the limit rod 20, moves toward the center along the axial direction of the limit rod 20. The movable block 17 drives the engaging block 18 to insert into the engaging slot 19 on the side wall of the ventilation duct 2, achieving a rigid connection between the fixed top plate 1 and the ventilation duct 2, ensuring that the entire device remains stable and reliable during operation.

[0038] When the HVAC system is operating normally, air flows in the ventilation duct 2. When the air flows through the ventilation duct 2, it will first come into contact with the activated carbon plate 26 inside the filter frame 3. The activated carbon plate 26 has a rich and rectangular array of microporous structures 27 inside. These microporous structures 27 have strong adsorption capacity and can efficiently adsorb various pollutants such as dust, particulate matter, microorganisms, etc. in the air, thereby purifying the air and providing a clean and healthy air environment indoors.

[0039] To replace the filter frame 3, the operator first rotates the rotating handle 5 clockwise, which drives the rotating screw 4. Due to the threaded connection between the clamping frame 6 and the rotating screw 4, the clamping frame 6 moves toward the center along the axial direction of the limiting telescopic rod 11 under the restraining action of the telescopic rod 11. The squeezing and telescopic rods 7 at the top and bottom of the inner cavity of the clamping frame 6 are compressed, and the squeezing springs 9 on their outer rings generate elastic force, pushing the squeezing plates 10 toward the ends of the clamping plates 8. The clamping plates 8 are squeezed toward the center under the action of the squeezing, thereby clamping the filter frame 3. Conversely, when the rotating handle 5 is rotated in the opposite direction, the clamping frame 6 moves to the sides under the action of the rotating screw 4. The squeezing springs 9 gradually return to their original position under their own elastic action, and the squeezing plates 10 also retract. The clamping plates 8 gradually open under the reset action of the squeezing and telescopic rods 7, thereby releasing the clamping of the filter frame 3 and achieving rapid removal of the filter frame 3.

[0040] When the filter frame 3 is released and removed, the mounting spring 23 in the pre-set groove 21 inside the ventilation duct 2 rapidly extends under its own elastic action, pushing the sealing plate 24 connected thereto outward along the axial direction of the mounting telescopic rod 22. The sealing plate 24 is mounted with a connecting plate 25. Under the uniform thrust of multiple groups of mounting springs 23 distributed in a rectangular array, the sealing plates 24 are tightly fitted together through the connecting plates 25, thereby forming a complete closed surface inside the ventilation duct 2, effectively preventing airflow from leaking through the gap created after the filter frame 3 is removed. When it is necessary to reinstall the filter frame 3, simply slowly insert the filter frame 3 into the ventilation duct 2. The filter frame 3 will squeeze the sealing plate 24, causing it to gradually retract into the groove 21 against the elastic force of the mounting spring 23, thereby automatically releasing the seal. The entire process requires no additional manual operation and is convenient and quick.

[0041] When the entire filter device needs to be disassembled as a whole, the servo motor 13 is reversed to drive the first bidirectional screw rod 14 and the second bidirectional screw rod 15 to rotate in the opposite direction. Under the action of the reverse rotation of the first bidirectional screw rod 14 and the second bidirectional screw rod 15, the moving block 17 drives the clamping block 18 to withdraw from the clamping groove 19 on the side wall of the ventilation duct 2, and the ventilation duct 2 and the fixed top plate 1 can be easily separated.

[0042] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A filtering device for HVAC engineering, characterized in that: include: A fixed top plate (1), wherein a ventilation duct (2) is provided at the bottom of the fixed top plate (1), and a filter frame (3) is provided inside the ventilation duct (2); A fixing mechanism, the fixing mechanism being located at the bottom of the fixed top plate (1) and being used for mounting between the fixed top plate (1) and the ventilation duct (2); a disassembly mechanism, the disassembly mechanism being located inside the ventilation duct (2) and being used for installing and disassembling the filter frame (3), the disassembly mechanism comprising a rotating assembly and a clamping assembly, the rotating assembly comprising a clamping assembly installed inside the ventilation duct (2) and being used for moving the position of the clamping assembly, the clamping assembly being located inside the ventilation duct (2) and being used for fixing the position of the filter frame (3); A sealing mechanism is located inside the ventilation duct (2) and is used for removing the filter frame (3).

2. A filtering device for HVAC engineering according to claim 1, characterized in that: The rotating assembly comprises a rotating screw (4) installed inside the ventilation duct (2), a rotating handle (5) is installed on one side of the rotating screw (4), a clamping frame (6) is installed on one side of the rotating screw (4), and two groups of the rotating screw (4) and the clamping frame (6) are provided and symmetrically distributed, and a telescopic assembly is installed between the ventilation duct (2) and the clamping frame (6).

3. A filtering device for HVAC engineering according to claim 2, characterized in that: The clamping assembly comprises an extrusion telescopic rod (7) mounted on the top and bottom of the inner cavity of the clamping frame (6), the top and bottom of the inner cavity of the clamping frame (6) are hinged with a clamping plate (8), an extrusion spring (9) is mounted on the outer ring of the extrusion telescopic rod (7), an extrusion plate (10) is mounted on one side of the extrusion spring (9) and the extrusion telescopic rod (7), and the extrusion plate (10) is located at the end of the clamping plate (8).

4. The filtering device for HVAC engineering according to claim 2, characterized in that: The telescopic assembly comprises a position-limiting telescopic rod (11) installed between the ventilation duct (2) and the clamping frame (6), and the position-limiting telescopic rod (11) is provided in four groups and distributed in a rectangular array.

5. The filtering device for HVAC engineering according to claim 1, characterized in that: The fixing mechanism includes a fixing frame (12) installed at the bottom of the fixed top plate (1), a servo motor (13) is installed on one side of the fixing frame (12), a first bidirectional screw rod (14) is installed on one side of the output shaft of the servo motor (13), a second bidirectional screw rod (15) is installed inside the fixing frame (12), a tensioning wheel (16) is installed on one side of the first bidirectional screw rod (14) and the second bidirectional screw rod (15), and the tensioning wheels (16) are connected by a rotating belt, and the outer rings of the first bidirectional screw rod (14) and the second bidirectional screw rod (15) are threadedly connected to a moving block (17), and the moving blocks (17) are provided in four groups and distributed in a rectangular array, a clamping assembly is installed on one side of the moving block (17), and a limiting assembly is installed inside the fixing frame (12).

6. The filtering device for HVAC engineering according to claim 5, characterized in that: The clamping assembly comprises a clamping block (18) mounted on one side of the moving block (17), and a clamping slot (19) is provided on both sides of the ventilation duct (2). The clamping block (18) slides inside the clamping slot (19), and the clamping blocks (18) are provided in four groups and distributed in a rectangular array, and the clamping slots (19) are provided in four groups and distributed in a rectangular array.

7. The filtering device for HVAC engineering according to claim 5, characterized in that: The limiting assembly comprises limiting rods (20) installed inside the fixed frame (12), wherein the limiting rods (20) are provided in multiple groups and are symmetrically distributed, and the limiting rods (20) are inserted into the interior of the moving block (17).

8. The filtering device for HVAC engineering according to claim 1, characterized in that: The sealing mechanism comprises a groove (21) provided inside the ventilation duct (2), the top and bottom of the inner cavity of the groove (21) are both provided with mounting telescopic rods (22), the outer ring of the mounting telescopic rod (22) is provided with a mounting spring (23), a sealing plate (24) is provided on one side of the mounting telescopic rod (22) and the mounting spring (23), a connecting plate (25) is provided on the front side of the sealing plate (24), and the mounting telescopic rods (22) and the mounting spring (23) are both provided with multiple groups and distributed in a rectangular array.

9. The filtering device for HVAC engineering according to claim 1, characterized in that: An activated carbon plate (26) is installed inside the filter frame (3), and a microporous structure (27) is provided inside the activated carbon plate (26). The microporous structure (27) is provided in multiple groups and distributed in a rectangular array.

10. The filtering device for HVAC engineering according to claim 1, characterized in that: The fixed top plate (1) is provided with mounting screw holes (28) inside, and the mounting screw holes (28) are internally threadedly connected to mounting screw rods (29). The mounting screw holes (28) are provided in four groups and are distributed in a rectangular array, and the mounting screw rods (29) are provided in four groups and are distributed in a rectangular array.

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