Central control type air conditioner ventilation system

Abstract

The invention discloses a central control type air conditioner ventilation system in the technical field of air conditioner ventilation, and the central control type air conditioner ventilation system comprises an air supply and exhaust pipeline, a mounting groove is formed in the top of the air supply and exhaust pipeline, and a fan and filter screens located on the two sides of the fan are mounted in the mounting groove; the rack is used for mounting the fan; the guide rail is slidably arranged on the rack; the clamp is used for clamping the filter screen; the shear fork frame is arranged between the guide rail and the clamp; the driving sliding block is slidably arranged in the guide rail; the pressing plate is arranged on the side wall of the rack; the driven sliding block and the shear fork frame are rotationally arranged; the triggering piece is slidably arranged with the clamp, and when the driven sliding block makes contact with the triggering piece, the triggering piece drives the clamp to loosen the filter screen; when the fan is taken out, the filter screen gets close to the mounting groove, the clamp loosens the filter screen below the mounting groove, the fan and the filter screen are taken out from the same position, the air supply and exhaust pipeline does not need to be disconnected from the air duct, the fan and the filter screen are simple in assembly and disassembly process and easy to operate, the distance between the filter screen and the fan can be guaranteed, and the running stability of the system is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning and ventilation, and in particular to a centrally controlled air conditioning and ventilation system. Background Art

[0002] The air conditioning ventilation system is a combination of the ventilation system and the air conditioning system. The ventilation system consists of air supply and exhaust components, air ducts, air duct components, mufflers, etc. Among them, the air supply and exhaust components, as one of the important components in the ventilation system, determine whether the indoor comfort is good or not. The main reason is that the air supply and exhaust components can determine the indoor temperature and air quality. During the operation of the fan blades of the air supply and exhaust components, the fan blades rub against air, water vapor, dust and other particles to generate static electricity, which makes the surface of the fan blades charged, causing dust particles to adhere to the fan blades. Static electricity will also generate an electric field around the fan blades, further prompting dust particles in the air to move to the fan blades and deposit.

[0003] The accumulated dust will cause the wind force blown out by the supply and exhaust air components to weaken, the operating efficiency to decrease, the fan blades to operate unbalancedly, and even breed bacteria that affect physical and mental health; therefore, the supply and exhaust air components need to be cleaned from dust regularly. The supply and exhaust air components in the existing air-conditioning and ventilation systems are difficult to clean. The air duct needs to be disconnected from the supply and exhaust air components before the fan and filter can be dismantled and cleaned. The disassembly and assembly process is time-consuming and labor-intensive, which increases the cleaning time and difficulty. Summary of the invention

[0004] The technical problem of the present invention is to provide a centrally controlled air conditioning and ventilation system. When the fan is taken out, the filter is moved close to the installation slot, and the clamp loosens the filter under the installation slot. The fan and the filter are taken out from the same place without the need to disconnect the supply and exhaust air ducts from the air ducts. The loading and unloading process of the fan and the filter is simple and easy to operate, and the distance between the filter and the fan can be guaranteed, thereby ensuring the stability of the system operation.

[0005] To achieve the above object, the present invention provides the following technical solution: a centrally controlled air conditioning and ventilation system, comprising an air supply and exhaust duct, wherein a mounting groove is provided at the top of the air supply and exhaust duct, and a fan and filters located on both sides of the fan are installed in the mounting groove;

[0006] The frame is used to install the fan and is fixed to the air supply and exhaust ducts through a detachable structure;

[0007] Guide rails, set with rack slides;

[0008] A clamp for holding the filter screen;

[0009] The scissor frame is arranged between the guide rail and the clamp, and the distance between the clamp and the guide rail is controlled by opening and closing the side opening of the scissor frame;

[0010] A driving slider is slidably disposed in the guide rail and is used to drive the side openings of the scissor frame to open and close;

[0011] The pressure plate is arranged on the side wall of the frame, and controls the opening and closing of the side opening of the scissor frame by driving the slider to rise and fall;

[0012] The driven slider is arranged to rotate with the scissor frame and to slide with the clamp;

[0013] The triggering member is slidably arranged with the clamp, and when the driven slider contacts the triggering member, the triggering member drives the clamp to release the filter screen.

[0014] As a further solution of the present invention, there are at least two driving sliders which are rotatably arranged at the ends of the scissor frame respectively, and a synchronization mechanism is arranged between the driving sliders, and the synchronization mechanism comprises:

[0015] Synchronous gear, slidingly arranged with guide rail;

[0016] A synchronous rack meshes with the synchronous gear and is fixed to the driving slider;

[0017] The return spring is arranged between the driving slider and the guide rail.

[0018] As a further solution of the present invention, the upper and lower ends of the clamp are provided with positioning components, and the positioning components are used to position the clamp in the air supply and exhaust ducts;

[0019] The positioning component comprises:

[0020] The positioning block is slidably arranged on both sides of the fixture and fixed to the trigger member;

[0021] A positioning frame, slidably arranged in the fixture;

[0022] A wedge-shaped block is fixed on the top of the positioning frame and is located on both sides of the trigger member;

[0023] The positioning spring is fixed between the triggering members.

[0024] As a further solution of the present invention, a groove is provided on the top of the positioning block, a top plate located in the groove is fixed on the top of the filter screen, and the depth of the groove is greater than the height of the top plate.

[0025] As a further solution of the present invention, the clamp comprises:

[0026] A frame, used for driving the filter to move;

[0027] Clamps are slidably arranged with the frame and are arranged in pairs;

[0028] The opening and closing plates are fixedly arranged on both sides of the clamping plate and are provided with chamfers;

[0029] The spring plate is arranged between the opening and closing plate and the frame.

[0030] As a further solution of the present invention, the pressing plate is slidably arranged with the frame, and the pressing plate is threadedly connected with an adjusting bolt.

[0031] As a further solution of the present invention, the detachable structure includes a mounting plate fixed to the top of the frame, and the mounting plate is fixed to the supply and exhaust air ducts by positioning bolts.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. In the present invention, the fan can be taken out from the supply and exhaust air duct through the frame, and at the same time, the pressure plate opens the side opening of the scissor frame by driving the slider, and the scissor frame moves the clamp and the filter to the bottom of the installation slot, and releases the clamp of the filter by the trigger member, and takes out the filter, so that the fan blades and the filter on the fan can be cleaned or replaced. During installation, the opening of the scissor frame is closed by the downward pressing action of the frame, and the scissor frame drives the clamp away from the frame by the trigger member, and the clamp clamps the filter and moves it to the specified position, maintaining a suitable distance from the fan, so as to ensure the stability and reliability of the system operation (too close). Too short or too far a distance may cause system performance degradation or failure. The specific distance is determined by factors such as pipeline layout, air flow velocity, filtration efficiency, system pressure drop, and maintenance cost. ), the fan and filter are both taken out from the installation slot. When the fan is taken out from the installation slot, the filter moves closer to the installation slot. After the fan is completely taken out, the clamp releases the filter and the filter is located under the installation slot. The filter can be taken out directly without disconnecting the supply and exhaust ducts from the air duct. The fan and filter are simple to install and remove, easy to operate, and can also ensure the distance between the filter and the fan, ensuring the stability of system operation.

[0034] 2. In the present invention, when the scissors frame drives the driven slider to approach each other, the scissors frame drives the positioning frame to slide in the clamp through the driven slider, the positioning frame drives the wedge block to squeeze the trigger member, the trigger member drives the positioning block to move into the clamp, when the positioning block moves into the clamp, the driven slider drives the clamp to move through the positioning frame, when the driven slider stops moving, the positioning spring pushes the trigger member to move, the trigger member pushes the positioning block out of the clamp and contacts the inner wall of the supply and exhaust air duct, so as to realize the positioning of the clamp at any position. The positioning block extends out of the clamp and can push the filter out of the installation groove through the groove and the top plate, which is convenient for taking the filter and further reducing the difficulty of replacing the filter.

[0035] 3. In the present invention, when the clamp moves to the bottom of the installation slot, the driven slider abuts against the trigger member, and the trigger member moves accordingly. The trigger member contacts and squeezes the opening and closing plate, and the opening and closing plate compresses the spring plate and drives the clamping plates to move away from each other, and the filter between the clamping plates is loosened; conversely, the driven slider disengages from the trigger member, and the positioning spring pulls the trigger member closer to each other, and the spring plate brings the clamping plates closer to each other through the opening and closing plate, thereby clamping the filter. When the clamp is located below the installation slot, the clamp releases the filter, and when the clamp is removed, the filter is clamped, thereby ensuring the stability of the filter in use and convenient removal during disassembly, further reducing the difficulty of replacing the filter.

[0036] 4. In the present invention, the pressure plate can be fixed at any position of the frame by adjusting the bolts, thereby changing the distance that the pressure plate drives the driving slider to move, and then changing the distance that the scissors frame drives the clamp to move, so as to adjust the distance between the filter and the fan. When the mesh number of the filter is large, the distance between the filter and the fan is increased, which provides a longer acceleration distance for the airflow, helps the airflow to reach a higher speed, thereby offsetting the resistance brought by the filter to a certain extent. Conversely, the distance between the filter and the fan is shortened, reducing the probability of generating eddy currents and turbulence and the pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 This is a schematic diagram of the overall installation structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the rack and its connection relationship of the present invention;

[0041] Figure 4 It is a schematic diagram of the cross-sectional structure of the frame of the present invention;

[0042] Figure 5 It is a schematic diagram of the guide rail and its connection structure of the present invention;

[0043] Figure 6 It is a schematic diagram of the guide rail and its connection cross-sectional structure of the present invention;

[0044] Figure 7 It is a schematic diagram of the clamp of the present invention and its connection structure;

[0045] Figure 8 For the present invention Figure 7The enlarged structural diagram at A in the middle;

[0046] Fig. 9 A schematic diagram of the trigger member and its connection structure of the present invention;

[0047] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0048] 1. Supply and exhaust air ducts; 11. Fan; 12. Filter; 13. Frame; 2. Guide rails; 21. Driving slider; 22. Pressure plate; 23. Driven slider; 24. Trigger; 3. Clamp; 31. Frame; 32. Clamp; 33. Opening and closing plate; 34. Spring plate; 4. Scissor frame; 51. Synchronous gear; 52. Synchronous rack; 53. Reset spring; 61. Positioning block; 62. Positioning frame; 63. Wedge block; 64. Positioning spring; 65. Groove; 66. Top plate; 7. Adjusting bolt; 8. Mounting plate. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0050] See also Figure 1-9 The present invention provides a technical solution: a centrally controlled air conditioning and ventilation system, comprising an air supply and exhaust duct 1, a mounting groove is provided at the top of the air supply and exhaust duct 1, a fan 11 and filters 12 located on both sides of the fan 11 are installed in the mounting groove;

[0051] The frame 13 is used to install the fan 11 and is fixed to the air supply and exhaust duct 1 through a detachable structure;

[0052] The guide rail 2 is slidably arranged with the frame 13;

[0053] A clamp 3, used for clamping the filter screen 12;

[0054] The scissor frame 4 is arranged between the guide rail 2 and the clamp 3, and the distance between the clamp 3 and the guide rail 2 is controlled by opening and closing the side opening of the scissor frame 4;

[0055] A driving slider 21 is slidably disposed in the guide rail 2 and is used to drive the side opening of the scissor frame 4 to open and close;

[0056] The pressing plate 22 is arranged on the side wall of the frame 13, and controls the opening and closing of the side opening of the scissor frame 4 by driving the slider 21 to rise and fall;

[0057] The driven slider 23 is rotatably arranged with the scissor frame 4 and slidably arranged with the clamp 3;

[0058] The trigger member 24 is slidably arranged with the clamp 3, and when the driven slider 23 contacts the trigger member 24, the trigger member 24 drives the clamp 3 to release the filter screen 12;

[0059] Specifically, when the fan 11 and the filter 12 need to be cleaned, the frame 13 is lifted upward, and the frame 13 is taken out of the installation slot on the air supply and exhaust duct 1, and the pressing plate 22 rises accordingly, and the pressing plate 22 opens the side opening of the scissor frame 4 by driving the slider 21. After the frame 13 is completely taken out of the air supply and exhaust duct 1, the fan 11 is taken out of the ventilation system, which is convenient for cleaning the dust on the fan 11 and avoiding the dust from adding burden to the operation of the fan 11;

[0060] When the side openings of the scissor frame 4 are opened, the driven sliders 23 move away from each other and drive the clamp 3 to approach the guide rail 2. The clamp 3 stops when it contacts the guide rail 2. When the clamp 3 is about to contact the guide rail 2, the driven slider 23 contacts and squeezes the trigger member 24. The trigger member 24 drives the clamp 3 to release the filter screen 12. At this time, the filter screen 12 is located below the installation slot. The filter screen 12 can be taken out from the air supply and exhaust duct 1 through the installation slot, which is convenient for cleaning or replacing the filter screen 12. The fan 11 and the filter screen 12 are taken out from the same place, which reduces the number of openings of the air supply and exhaust duct 1 and improves the structural strength of the air supply and exhaust duct 1.

[0061] During installation, the cleaned filter 12 is inserted into the clamp 3, and then the cleaned fan 11 is installed into the supply and exhaust air duct 1 by inserting the frame 13 into the installation groove. During the descent of the frame 13, the pressure plate 22 contacts and drives the side opening of the scissor frame 4 to close through the driving slider 21. The scissor frame 4 drives the driven slider 23 to approach each other, and the driven slider 23 is separated from the trigger member 24 clamp 3. The clamp 3 clamps the filter 12 therein. At the same time, as the side opening of the scissor frame 4 closes, the clamp 3 gradually moves away from the guide rail 2 until the clamp 3 drives the filter 12 to move to the specified position. The filter 12 and the fan 11 are both installed in the supply and exhaust air duct 1 and can be put into use again.

[0062] In summary, the fan 11 can be taken out from the air supply and exhaust duct 1 through the frame 13, and at the same time, the pressure plate 22 opens the side opening of the scissor frame 4 by driving the slider 21, and the scissor frame 4 moves the clamp 3 and the filter 12 to the bottom of the installation slot, and releases the clamp 3 from the filter 12 through the trigger 24, and the filter 12 is taken out, so that the fan blades and the filter 12 on the fan 11 can be cleaned or replaced. During installation, the opening of the scissor frame 4 is closed by the downward pressing action of the frame 13, and the scissor frame 4 drives the clamp 3 away from the frame 13 through the trigger 24, and the clamp 3 clamps and moves the filter 12 to the specified position, maintaining a suitable distance from the fan 11, to ensure the stability and Reliability (a distance that is too close or too far may cause system performance degradation or failure. The specific distance is determined by multiple factors such as pipeline layout, air flow velocity, filtration efficiency, system pressure drop, and maintenance cost.), the fan 11 and the filter 12 are both taken out from the installation slot, and the filter 12 moves closer to the installation slot while the fan 11 is taken out from the installation slot. After the fan 11 is completely taken out, the clamp 3 releases the filter 12 and the filter 12 is located below the installation slot, so the filter 12 can be directly taken out without disconnecting the supply and exhaust ducts 1 from the air duct. The loading and unloading process of the fan 11 and the filter 12 is simple and easy to operate, and the spacing between the filter 12 and the fan 11 can be guaranteed to ensure the stability of the system operation.

[0063] As a further solution of the present invention, there are at least two driving sliders 21 which are rotatably arranged at the ends of the scissor frame 4, and a synchronization mechanism is arranged between the driving sliders 21. The synchronization mechanism includes:

[0064] A synchronous gear 51 is slidably arranged with the guide rail 2;

[0065] The synchronous rack 52 is meshed with the synchronous gear 51 and fixed to the driving slider 21;

[0066] A return spring 53 is provided between the driving slider 21 and the guide rail 2;

[0067] For details, see the attached manual. Figure 5 and Figure 6 When the pressing plate 22 presses down the upper driving slider 21 to move, the synchronization mechanism drives the lower driving slider 21 to move upward synchronously, the driving sliders 21 approach each other and drive the side openings of the scissor frame 4 to close, and the clamp 3 and the filter screen 12 are away from the frame 13. On the contrary, the return spring 53 pulls the driving slider 21 away from each other, the side openings of the scissor frame 4 open, and the clamp 3 and the filter screen 12 approach the frame 13, so that the filter screen 12 is moved closer to or away from the frame 13 while moving the frame 13, which is convenient for loading and unloading the filter screen 12;

[0068] When one of the driving sliders 21 moves, the synchronous rack 52 fixed thereto moves accordingly, and the synchronous gear 51 drives the driving slider 21 fixed thereto to move through the other synchronous rack 52 , thereby realizing the synchronous reverse movement of the driving slider 21 .

[0069] As a further solution of the present invention, both upper and lower ends of the clamp 3 are provided with positioning components, and the positioning components are used to position the clamp 3 in the air supply and exhaust duct 1;

[0070] The positioning components include:

[0071] The positioning blocks 61 are slidably disposed on both sides of the clamp 3 and fixed to the trigger member 24;

[0072] The positioning frame 62 is slidably disposed in the fixture 3;

[0073] The wedge block 63 is fixed on the top of the positioning frame 62 and is located on both sides of the trigger member 24;

[0074] A positioning spring 64 is fixed between the trigger members 24;

[0075] For details, see the attached manual. Figure 7 and Figure 8 When the scissors frame 4 drives the driven slider 23 to approach each other, the scissors frame 4 drives the positioning frame 62 to slide in the clamp 3 through the driven slider 23, the positioning frame 62 drives the wedge block 63 to squeeze the trigger member 24, and the trigger member 24 drives the positioning block 61 to move into the clamp 3. When the positioning block 61 moves into the clamp 3, the driven slider 23 drives the clamp 3 to move through the positioning frame 62. When the driven slider 23 stops moving, the positioning spring 64 pushes the trigger member 24 to move. The trigger member 24 pushes the positioning block 61 out of the clamp 3 and contacts the inner wall of the supply and exhaust air duct 1, thereby realizing the positioning of the clamp 3 at any position.

[0076] As a further solution of the present invention, a groove 65 is formed on the top of the positioning block 61, and a top plate 66 located in the groove 65 is fixed on the top of the filter screen 12, and the depth of the groove 65 is greater than the height of the top plate 66;

[0077] Specifically, when the clamp 3 is located below the mounting groove, the positioning block 61 extends out of the clamp 3 and can push the filter 12 out of the mounting groove through the groove 65 and the top plate 66, making it easy to take out the filter 12 and further reducing the difficulty of replacing the filter 12; the depth of the groove 65 is greater than the height of the top plate 66, which can ensure that when the positioning block 61 partially extends out of the clamp 3 to position it in the supply and exhaust air duct 1, the top plate 66 does not rise, thereby avoiding frequent lifting and lowering of the filter 12, accelerating the loss of the edge of the filter 12, and reducing the clamping force of the clamp 3 on the filter 12.

[0078] As a further solution of the present invention, the clamp 3 comprises:

[0079] The frame 31 is used to drive the filter screen 12 to move;

[0080] The clamping plate 32 is slidably arranged with the frame 31 and is arranged in pairs;

[0081] The opening and closing plates 33 are fixedly arranged on both sides of the clamping plate 32 and are provided with chamfers;

[0082] A spring plate 34 is disposed between the opening and closing plate 33 and the frame 31;

[0083] For details, see Figure 7 and Figure 8 When the clamp 3 moves to the bottom of the installation slot, the driven slider 23 contacts the trigger member 24, and the trigger member 24 moves accordingly. The trigger member 24 contacts and squeezes the opening and closing plate 33. The opening and closing plate 33 compresses the spring plate 34 and drives the clamping plates 32 to move away from each other, and the filter screen 12 between the clamping plates 32 is released; on the contrary, the driven slider 23 disengages from the trigger member 24, and the positioning spring 64 pulls the trigger member 24 closer to each other. The spring plate 34 brings the clamping plates 32 closer to each other through the opening and closing plate 33, thereby clamping the filter screen 12. When the clamp 3 is located below the installation slot, the clamp 3 releases the filter screen 12, and when the clamp 3 is removed, the filter screen 12 is clamped, which ensures the stability of the filter screen 12 in use and is convenient to take when disassembled, further reducing the difficulty of replacing the filter screen 12.

[0084] As a further solution of the present invention, the pressing plate 22 is slidably arranged with the frame 13, and the pressing plate 22 is threadedly connected with the adjusting bolt 7;

[0085] Specifically, the pressure plate 22 can be fixed at any position of the frame 13 by adjusting the bolts 7, thereby changing the distance that the pressure plate 22 drives the driving slider 21 to move, and then changing the distance that the scissors frame 4 drives the clamp 3 to move, so as to adjust the distance between the filter 12 and the fan 11. When the mesh number of the filter 12 is large, the distance between the filter 12 and the fan 11 is increased, which provides a longer acceleration distance for the airflow, helps the airflow to reach a higher speed, thereby offsetting the resistance brought by the filter 12 to a certain extent. Conversely, the distance between the filter 12 and the fan 11 is shortened, and the probability of generating eddy currents and turbulence and the pressure loss are reduced.

[0086] As a further solution of the present invention, the detachable structure includes a mounting plate 8 fixedly mounted on the top of the frame 13, and the mounting plate 8 is fixed to the air supply and exhaust duct 1 by positioning bolts;

[0087] Specifically, it is used for installation and disassembly between the rack 13 and the air supply and exhaust ducts 1.

Claims

1. A centrally controlled air conditioning and ventilation system, comprising an air supply and exhaust duct (1), characterized in that: The top of the air supply and exhaust duct (1) is provided with an installation groove, in which a fan (11) and filters (12) located on both sides of the fan (11) are installed; A frame (13) is used to install the fan (11) and is fixed to the air supply and exhaust ducts (1) via a detachable structure; The guide rail (2) is slidably arranged with the frame (13); A clamp (3) for clamping the filter screen (12); The scissor frame (4) is arranged between the guide rail (2) and the clamp (3), and the distance between the clamp (3) and the guide rail (2) is controlled by opening and closing the side opening of the scissor frame (4); A driving slider (21) is slidably disposed in the guide rail (2) and is used to drive the side openings of the scissor frame (4) to open and close; A pressing plate (22) is arranged on the side wall of the frame (13) and controls the opening and closing of the side opening of the scissor frame (4) by driving the slider (21) to rise and fall; A driven slider (23) is rotatably arranged with the scissor frame (4) and slidably arranged with the clamp (3); The trigger member (24) is slidably arranged with the clamp (3), and when the driven slider (23) contacts the trigger member (24), the trigger member (24) drives the clamp (3) to release the filter screen (12).

2. A centrally controlled air conditioning and ventilation system according to claim 1, characterized in that: There are at least two driving sliders (21) which are rotatably disposed at the ends of the scissor frame (4) respectively, and a synchronization mechanism is disposed between the driving sliders (21), wherein the synchronization mechanism comprises: A synchronous gear (51) is slidably arranged with the guide rail (2); A synchronous rack (52) meshes with the synchronous gear (51) and is fixed to the driving slider (21); The return spring (53) is arranged between the driving slider (21) and the guide rail (2).

3. A centrally controlled air conditioning and ventilation system according to claim 1, characterized in that: The clamp (3) is provided with positioning components at both the upper and lower ends, and the positioning components are used to position the clamp (3) in the air supply and exhaust duct (1); The positioning component comprises: A positioning block (61) is slidably disposed on both sides of the clamp (3) and fixed to the trigger member (24); A positioning frame (62) is slidably disposed in the fixture (3); A wedge block (63) is fixedly mounted on the top of the positioning frame (62) and is located on both sides of the trigger member (24); The positioning spring (64) is fixed between the triggering members (24).

4. A centrally controlled air conditioning and ventilation system according to claim 3, characterized in that: A groove (65) is provided on the top of the positioning block (61), and a top plate (66) located in the groove (65) is fixedly provided on the top of the filter screen (12), and the depth of the groove (65) is greater than the height of the top plate (66).

5. A centrally controlled air conditioning and ventilation system according to claim 1, characterized in that: The clamp (3) comprises: A frame (31) for driving the filter (12) to move; The clamping plates (32) are slidably arranged with the frame (31) and are arranged in pairs; The opening and closing plates (33) are fixedly arranged on both sides of the clamping plate (32) and are provided with chamfers; The spring plate (34) is arranged between the opening and closing plate (33) and the frame (31).

6. A centrally controlled air conditioning and ventilation system according to claim 1, characterized in that: The pressing plate (22) is slidably arranged with the frame (13), and the pressing plate (22) is threadedly connected with an adjusting bolt (7).

7. A centrally controlled air conditioning and ventilation system according to claim 1, characterized in that: The detachable structure comprises a mounting plate (8) fixedly mounted on the top of the frame (13); the mounting plate (8) and the air supply and exhaust ducts (1) are fixed by positioning bolts.

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