Clean air supply system

Abstract

A plurality of frame bodies are arranged in a branch air pipe of the clean air supply system at intervals in the length direction of the branch air pipe, the four outer side walls of each frame body make contact with the inner wall face of the branch air pipe, and the two opposite inner walls of each frame body are each rotationally provided with a pressing plate; one end of a connecting rod extending in the length direction of the branch air pipe penetrates through the frame bodies and is arranged between any two pressing plates symmetrically arranged on the inner wall of the same frame body, and a second sliding groove is formed in each pressing plate and extends from the area close to the inner wall of the frame body to the area close to the connecting rod. A second sliding block slidably installed in the second sliding groove is connected with the connecting rod through a steel bar, and the other end of the connecting rod extends out of the branch air pipe and is connected with a driving assembly. The air supply speed can be controlled, and the inner wall of the ventilation pipe can be cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification devices, and in particular to a clean air supply system. Background Art

[0002] The laminar air supply system uses air purification technology to control microbial contamination to varying degrees, so as to control the air cleanliness in the space environment to meet the requirements of various surgeries, provide appropriate temperature and humidity, and create a clean and comfortable surgical space environment. It is widely used in clean operating rooms, clean wards, clean animal rooms and other places.

[0003] The Chinese invention patent with the patent publication number CN206919244U discloses a leakproof laminar air supply ceiling for an operating room, which belongs to the field of air purification devices. It includes a ceiling body and a filter static pressure box, the ceiling body includes a frame plate surrounding a cuboid and a frame fixed on the frame plate, wherein a ventilation flange is arranged on the side frame plate surrounding the cuboid, an airflow compensation body is arranged in the middle of the frame, the airflow compensation body is connected to the frame plate through a gauze frame, a DPP flow-balancing net is installed below the frame plate, a top cover plate is arranged in the middle of the DPP flow-balancing net, and the top cover plate covers the bottom of the airflow compensation body, the filter static pressure box is relatively provided with an air inlet and an air outlet, the air outlet is connected to the ventilation flange through a ventilation duct, a filter fixing support frame is installed inside the filter static pressure box, and a combined high-efficiency filter is installed on the filter fixing support frame. Compared with the prior art, it is easy to maintain, can be maintained without being in the operating room, and can effectively prevent leakage.

[0004] However, the above patent has the following shortcomings: during the installation process of the air supply ceiling and the connecting pipe components arranged above the operating room ceiling, there is little operable space between the air supply ceiling and the operating room ceiling, and the connection between the air supply ceiling and the operating room ceiling is in a completely fitted state. The inspection and cleaning of the air supply ceiling and the connected pipe components require large-scale disassembly, and may even destroy the structure of the operating room ceiling, causing irreversible damage. The operation is cumbersome. At the same time, large-scale disassembly work will affect the normal operation of the operating room and cause pollution to the internal environment of the operating room. After the inspection and cleaning work is completed, the operating room needs to be uniformly sterilized and cleaned, which wastes manpower and material resources. Summary of the invention

[0005] The main purpose of the present invention is to provide a clean air supply system, which can control the air supply rate and clean the inner wall of the ventilation pipe.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a clean air supply system, comprising: an air supply box and an air supply pipe group installed on the suspended ceiling, the air supply pipe group is arranged above the suspended ceiling, the air supply box is located below the suspended ceiling, the air supply pipe group comprises a main air duct connected to the static pressure box at one end and at least two branch air ducts each connected to the other end of the main air duct, and the end of the branch air duct away from the main air duct is connected to the air supply box through a connecting pipe; A plurality of frames are arranged at intervals in the branch air duct along its length direction, and the four outer side walls of each of the frames are in contact with the inner wall surface of the branch air duct, and a pressure plate is rotatably installed on each of the two opposite inner walls of the frame, and one end of a connecting rod extending along the length direction of the branch air duct passes through the plurality of frames and is arranged between any two pressure plates symmetrically arranged on the inner wall of the same frame, and a second slide groove is provided on the pressure plate, and the second slide groove extends from an area close to the inner wall of the frame to an area close to the connecting rod, and a second slider slidably installed in the second slide groove is connected to the connecting rod through a steel bar, and the other end of the connecting rod protrudes outward from the branch air duct and is connected to a driving component; The driving assembly includes: a mounting sleeve arranged above the suspended ceiling, a connecting sleeve connected to one side of the mounting sleeve and communicated with the mounting sleeve, and a sealing plate, wherein the sealing plate is installed at the bottom of the suspended ceiling through a mounting block, a first electromagnetic block is arranged in the mounting sleeve, a second electromagnetic block is arranged in the connecting sleeve, and the second electromagnetic block is connected to the end of the connecting rod on the side opposite to the first electromagnetic block.

[0007] The further improved scheme in the above technical scheme is as follows: 1. In the above scheme, a first slider is respectively provided on the two opposite outer walls of the frame, a first slide groove corresponding to the first slider is opened on the inner wall of the branch air duct, one end of the first slider is fixedly connected to the frame, and the other end of the first slider can be slidably embedded in the first slide groove extending along the length direction of the branch air duct, and a first spring is installed in the first slide groove and on the side of the first slider opposite to the static pressure box.

[0008] 2. In the above solution, a second spring is connected between the surface of the pressure plate opposite to the second slide groove and the inner wall of the branch air duct, and the elastic resistance of the second spring is smaller than the elastic resistance of the first spring.

[0009] 3. In the above solution, the bottom of the mounting sleeve has a mounting opening, and the sealing plate is sealed and connected to the mounting opening.

[0010] 4. In the above solution, the mounting block is connected to the ceiling by screws.

[0011] 5. In the above scheme, there are two groups of air supply pipes, which are symmetrically arranged on both sides above the air supply box.

[0012] 6. In the above scheme, there are four branch air ducts and connecting pipes, which are connected one by one.

[0013] 7. In the above scheme, the connecting rods in the two branch air ducts symmetrically arranged on both sides of the air supply box body are on the same axis.

[0014] 8. In the above solution, each side of the installation sleeve is connected to a connecting sleeve with a second electromagnetic block built in.

[0015] 9. In the above solution, one end of the steel bar is connected to the universal ball head installed on the second sliding block, and the other end of the steel bar is connected to the outer side wall of the connecting rod.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The clean air supply system of the present invention has an air supply duct group arranged above the suspended ceiling, and the air supply box body is located below the suspended ceiling, and the air supply duct group includes a main air duct connected to the static pressure box at one end and at least two branch air ducts respectively connected to the other end of the main air duct, and the end of the branch air duct away from the main air duct is connected to the air supply box body through a connecting pipe, thereby increasing the space between the air supply box body and the suspended ceiling, facilitating the disassembly and assembly, cleaning of various air supply components and replacement of consumables in the air supply box body without disassembling the entire air supply box body and the suspended ceiling, which not only improves the efficiency of maintenance and cleaning, but also reduces the interference to the indoor air environment; further, a plurality of frames are arranged at intervals in the branch air duct along its length direction, and the four outer walls of each frame body are in contact with the inner wall surface of the branch air duct, and a pressure plate is rotatably installed on each of the two opposite inner walls of the frame, and one end of a connecting rod extending along the length direction of the branch air duct passes through the plurality of frames and is arranged on any two symmetrically arranged on the inner wall of the same frame A second slide groove is provided on the pressure plate between the pressure plates, and the second slide groove extends from an area close to the inner wall of the frame to an area close to the connecting rod. A second sliding block slidably installed in the second slide groove is connected to the connecting rod through a steel bar. The other end of the connecting rod extends outwardly from the branch air duct and is connected to a driving component. The driving component includes: a mounting sleeve arranged above the suspended ceiling, a connecting sleeve connected to one side of the mounting sleeve and communicated with the mounting sleeve, and a sealing plate. The sealing plate is installed at the bottom of the suspended ceiling through a mounting block. A first electromagnetic block is arranged in the mounting sleeve, and a second electromagnetic block is arranged in the connecting sleeve. The second electromagnetic block is connected to the end of the connecting rod on the side opposite to the first electromagnetic block. The connecting rod is controlled to move in the length direction of the branch air duct by electromagnetic drive, which can not only realize the adjustment of the fresh air flow rate in the air duct to realize the control and adjustment of the air supply rate of the air supply ceiling, but also can clean the inner wall of the air duct in time without large-scale disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the overall structure of the present invention installed on the ceiling; Figure 2 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic plan view of the overall structure of the present invention; Figure 4 It is a cross-sectional schematic diagram of the ventilation pipe in the present invention; Figure 5 for Figure 4 A in the enlarged view; Figure 6 for Figure 4 The enlarged view of point B in the figure; Figure 7 It is a schematic diagram of the three-dimensional structure of the frame in the present invention; Figure 8 for Figure 7 The enlarged view of point C in the figure; Fig. 9 It is a schematic cross-sectional view of the frame in the present invention; Fig.10 It is a cross-sectional schematic diagram of the cooperation between the second sliding block and the second sliding groove in the present invention; Fig.11 It is a plan view of the exhaust fan and the connecting pipe in the present invention.

[0018] In the above figures: 1. air supply box; 2. ceiling; 3. main air duct; 301. static pressure box; 302. connecting flange; 4. branch air duct; 5. connecting pipe; 6. connecting rod; 7. frame; 701. first slider; 702. first slide groove; 703. first spring; 704. pressure plate; 705. second slide groove; 706. second slider; 707. universal ball head; 708. steel bar; 709. second spring; 710. shovel plate; 8. mounting sleeve; 801. sealing plate; 802. connecting sleeve; 803. mounting block; 804. first electromagnetic block; 805. second electromagnetic block; 9. exhaust fan; 901. suction duct; 902. electromagnetic valve; 10. DPP flow equalization network. Implementation

[0019] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0020] Embodiment 1: A clean air supply system, comprising: an air supply box 1 and an air supply duct group installed on a suspended ceiling 2 of an operating room, a clean room or a laboratory, wherein the air supply duct group is arranged above the suspended ceiling 2, and the air supply box 1 is located below the suspended ceiling 2, wherein the air supply duct group comprises a main air duct 3 connected to a static pressure box 301 at one end and at least two branch air ducts 4 each connected to the other end of the main air duct 3, wherein the end of the branch air duct 4 away from the main air duct 3 is connected to the air supply box 1 through a connecting pipe 5; A plurality of frames 7 are arranged at intervals in the branch air duct 4 along its length direction, and the four outer walls of each of the frames 7 are in contact with the inner wall surface of the branch air duct 4. A pressure plate 704 is rotatably installed on each of the two opposite inner walls of the frames 7. One end of a connecting rod 6 extending along the length direction of the branch air duct 4 passes through the plurality of frames 7 and is arranged between any two pressure plates 704 symmetrically arranged on the inner wall of the same frame 7. A second slide groove 705 is provided on the pressure plate 704, and the second slide groove 705 extends from an area close to the inner wall of the frame 7 to an area close to the connecting rod 6. A second slider 706 slidably installed in the second slide groove 705 is connected to the connecting rod 6 through a steel bar 708. The other end of the connecting rod 6 extends outward from the branch air duct 4 and is connected to a driving assembly for driving the connecting rod to move back and forth along the length direction of the branch air duct. The connecting rod 6 pulls the second slider 706 through the steel bar 708, and the second slider 706 slides in the second slide groove 705, so that the second slider 706 generates pressure on the pressure plate 704 during the movement, so that the pressure plate 704 flips toward the inner wall of the frame 7, and the flipping of the pressure plate 704 directly affects the speed of the fresh air passing through the frame 7, thereby effectively changing the flow rate of the fresh air; The driving assembly includes: an installation sleeve 8 arranged above the suspended ceiling 2, a connecting sleeve 802 connected to one side of the installation sleeve 8 and communicated with the installation sleeve 8, and a sealing plate 801, the sealing plate 801 is installed at the bottom of the suspended ceiling 2 through a mounting block 803, a first electromagnetic block 804 is arranged in the installation sleeve 8, a second electromagnetic block 805 is arranged in the connecting sleeve 802, and the second electromagnetic block 805 is connected to the end of the connecting rod 6 on the side opposite to the first electromagnetic block 804.

[0021] The first electromagnetic block 804 is connected to the indoor wires through a circuit, and a resistor is provided on the circuit. The magnitude of the current in the first electromagnetic block 804 is controlled by adjusting the magnitude of the resistor, thereby changing the magnetic force of the first electromagnetic block 804. When the magnitude of the magnetic force changes, the second electromagnetic block 805 is driven to move horizontally, thereby achieving the effect of changing the fresh air speed and cleaning the branch air duct 4. By driving by electromagnetic force, noise can be reduced, and excessive noise can be prevented from affecting the work of personnel in the room. In addition, during maintenance, maintenance can be carried out in sufficient space, and the sealing plate 801 can be removed from the ceiling 2, so that the inside of the installation sleeve 8 is exposed, which is convenient for maintenance work, and there is no need to cause structural damage to the ceiling 2. A first slider 701 is disposed on each of the two opposing outer walls of the frame 72, and a first slide groove 702 corresponding to the first slider 701 is provided on the inner wall of the branch air duct 4. The first slider 701, one end of which is fixedly connected to the frame 7, and the other end of which can be slidably embedded in the first slide groove 702 extending along the length direction of the branch air duct 4, is provided in the first slide groove 702 and on the side of the first slider 701 opposite to the static pressure box 301. A first spring 703 is installed; When cleaning the branch air duct 4, the second slider 706 moves to the boundary of the second slide groove 705, and the connecting rod 6 continues to move, thereby driving the frame 7 to move synchronously, so that the frame 7 scrapes the inner wall of the branch air duct 4, thereby removing the stains remaining in the branch air duct 4, and the stains are discharged with the flow of fresh air; When cleaning the branch air duct 4, the room is in an unoccupied state, so as to avoid the discharged stains causing safety risks to the people inside the room. Therefore, when cleaning the branch air duct 4, it can be completed by simply pulling the frame 7, so as to avoid structural damage to the ceiling 2; A second spring 709 is connected between the surface of the pressure plate 704 opposite to the second slide groove 705 and the inner wall of the branch air duct 4. The elastic resistance of the second spring 709 is smaller than the elastic resistance of the first spring 703, and the resistance of the first spring 703 is much larger than the resistance of the second spring 709. Therefore, when the second slider 706 is pulled, the force of pulling the second slider 706 at this time cannot squeeze the first spring 703, thereby ensuring the stability of the frame 7 and preventing the frame 7 from moving and causing stains to enter the room when the wind speed is adjusted, causing discomfort to personnel. Only when the branch air duct 4 is cleaned, that is, when the second slider 706 and the second slide groove 705 are in contact with each other, can the frame 7 be driven to move. When the wind speed is adjusted, the second slider 706 is always in a range that does not conflict with the boundary of the second slide groove 705; An exhaust fan 9 is installed on the top of the air supply box 1, and the exhaust fan 9 is connected to the connecting pipe 5 through a plurality of air suction ducts 901; Each of the above-mentioned air suction ducts 901 is equipped with a solenoid valve 902. When cleaning the branch air duct 4, the solenoid valve 902 and the exhaust fan 9 are opened, so that the cleaned stains in the branch air duct 4 will be sucked into the exhaust fan 9, and then the output end of the exhaust fan 9 is connected to the external pipeline to discharge the stains, thereby preventing the stains from entering the air supply box 1 and the room; A shovel plate 710 is installed at the edge of the frame 7, which can improve the cleaning effect of the frame 7 on the inner wall of the branch air duct 4; The frame 7 and the shovel plate 710 are each fixedly connected with a rubber layer on the end surface in contact with the branch air duct 4, which can reduce the wear on the inner wall of the branch air duct 4 and reduce the noise generated during cleaning; The linear movement of the connecting rod 6 is controlled by the driving component to drive the pressure plate 704 to flip and adjust the fresh air flow rate in the branch air duct 4, thereby achieving the purpose of controlling the air supply rate of the air supply box 1 and improving practicality. In addition, the frame 7 can clean the inner wall of the branch air duct 4 under the drive of the connecting rod 6, without disassembling the branch air duct 4 and the ceiling 2. After the air supply box 1 is installed on the ceiling 2, there is no need for large-scale disassembly and cleaning work inside the room, which effectively protects the indoor structure and sanitary environment.

[0022] Embodiment 2: A clean air supply system, comprising: an air supply box 1 and an air supply duct group installed on a suspended ceiling 2, wherein the air supply duct group is arranged above the suspended ceiling 2, and the air supply box 1 is located below the suspended ceiling 2, wherein the air supply duct group comprises a main air duct 3 connected to a static pressure box 301 at one end and at least two branch air ducts 4 each connected to the other end of the main air duct 3, wherein one end of the branch air duct 4 away from the main air duct 3 is connected to the air supply box 1 through a connecting pipe 5; A plurality of frames 7 are arranged at intervals along the length direction of the branch air duct 4, and the four outer walls of each of the frames 7 are in contact with the inner wall surface of the branch air duct 4. A pressing plate 704 is rotatably installed on each of the 2 opposite inner walls of the frames 7. One end of a connecting rod 6 extending along the length direction of the branch air duct 4 passes through the plurality of frames 7 and is arranged between any two pressing plates 704 symmetrically arranged on the inner wall of the same frame 7. A second sliding groove 705 is provided on the pressing plate 704, and the second sliding groove 705 extends from an area close to the inner wall of the frame 7 to an area close to the connecting rod 6. A second sliding block 706 slidably installed in the second sliding groove 705 is connected to the connecting rod 6 through a steel bar 708. The other end of the connecting rod 6 protrudes outward from the branch air duct 4 and is connected to a driving component. When disassembling the connecting pipe, there is no need to enter the room, which is convenient for disassembly and subsequent cleaning of the connecting pipe. At the same time, the connecting pipe is under the suspended ceiling. When disassembling the connecting pipe, there is no need to dismantle the entire air supply ceiling and suspended ceiling, which is convenient for disassembly and cleaning of the connecting pipe; The driving component controls the linear movement of the connecting rod to adjust the fresh air flow rate in the ventilation duct, thereby achieving the purpose of controlling the air supply rate of the air supply ceiling, improving practicality, and being able to clean the inner wall of the ventilation duct without disassembling the ventilation duct and the suspended ceiling. After the air supply ceiling is installed on the suspended ceiling, there is no need to carry out large-scale disassembly and cleaning work indoors, which effectively protects the structural environment in the operating room; it can also effectively change the flow rate of the fresh air; The driving assembly includes: an installation sleeve 8 arranged above the suspended ceiling 2, a connecting sleeve 802 connected to one side of the installation sleeve 8 and communicated with the installation sleeve 8, and a sealing plate 801, the sealing plate 801 is installed at the bottom of the suspended ceiling 2 through a mounting block 803, a first electromagnetic block 804 is arranged in the installation sleeve 8, a second electromagnetic block 805 is arranged in the connecting sleeve 802, and the second electromagnetic block 805 is connected to the end of the connecting rod 6 on the side opposite to the first electromagnetic block 804.

[0023] The bottom of the installation sleeve 8 has an installation opening, and the sealing plate 801 is sealed and connected to the installation opening; the installation block 803 is connected to the ceiling 2 by screws; the air supply pipe group is provided with two groups, and is symmetrically arranged on both sides above the air supply box 1; the branch air pipes 4 and the connecting pipes 5 are each provided with four and are connected one by one; the connecting rods 6 in the two branch air pipes 4 symmetrically arranged on both sides of the air supply box 1 are on the same axis; the two sides of the installation sleeve 8 are respectively connected with a connecting sleeve 802 with a second electromagnetic block 805 built in; Each of the branch air ducts 4 is sealed and connected to the main air duct 3 via a connecting flange 302; an air outlet connected to the connecting pipe 5 is provided at the bottom of the branch air duct 4 at one end away from the main air duct 3; the upper end of the vertically arranged connecting pipe 5 is inserted into the air outlet of the branch air duct 4 and sealed and connected thereto; The other end of the connecting pipe 5, one end of which is connected to the branch air pipe 4, passes through the ceiling 2 and is sealed and connected to the top of the air supply box 1; The air supply box 1 is installed in the central area of ​​the ceiling 2; at least one operating table is placed directly below the air supply box 1; the air supply box 1 is composed of a plurality of interconnected sub-boxes; a DPP flow-balancing net 10 is fixedly connected to the bottom of the air supply box 1; One end of the steel bar 708 is connected to the universal ball head 707 installed on the second slider 706, and the other end of the steel bar 708 is connected to the outer wall of the connecting rod 6; the universal ball head 707 is installed on the end surface of the second slider 706 facing the steel bar 708; the second slide groove 705 is opened on the surface of the pressure plate 704 close to the static pressure box 301; the frame 7 is a rectangular frame.

[0024] The working principle is as follows: the main air duct 3 and the static pressure box 301 are both outdoors, and then the fresh air is introduced into the air supply box 1 through a plurality of branch air ducts 4 and the connecting pipe 5, and enters the room through the air supply box 1. During long-term use, stains in the air will remain on the inner walls of the main air duct 3, the branch air duct 4 and the connecting pipe 5. If they are not cleaned for a long time, bacteria will be generated, causing cross infection. The main air duct 3 is outdoors, and there is no need to enter the room when disassembling and assembling the main air duct 3, which is convenient for disassembly and assembly of the main air duct 3 and subsequent cleaning. At the same time, the connecting pipe 5 is under the ceiling 2. When disassembling and assembling the connecting pipe 5, there is no need to disassemble the entire air supply box 1 and the ceiling 2, which is convenient for disassembly and assembly and cleaning of the connecting pipe 5. At the same time, the linear movement of the connecting rod 6 is controlled by electromagnetic power to adjust the fresh air flow rate in the branch air duct 4, thereby achieving the purpose of controlling the air supply rate of the air supply box 1, improving practicality, and the air volume adjustment component can clean the inner wall of the branch air duct 4 under the drive of the connecting rod 6, without disassembling the branch air duct 4 and the ceiling 2; In the present invention, after the air supply box 1 is installed on the ceiling 2, there is no need to carry out large-scale disassembly and cleaning work indoors, thereby effectively protecting the indoor structure and sanitary environment.

[0025] When the above-mentioned clean air supply system is adopted, the space between the air supply box and the ceiling is increased, which is convenient for the disassembly and assembly, cleaning of various air supply components and the replacement of consumables in the air supply box, without the need to disassemble the entire air supply box and the ceiling, which not only improves the efficiency of maintenance and cleaning, but also reduces the interference to the indoor air environment; further, by electromagnetically driving the connecting rod to move in the length direction of the branch air duct, it is possible to adjust the fresh air flow rate in the air duct to achieve control and adjustment of the air supply rate of the air supply ceiling, and the inner wall of the air duct can be cleaned in time without large-scale disassembly and assembly.

[0026] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A clean air supply system, comprising: An air supply box (1) and an air supply pipe group installed on a suspended ceiling (2), wherein the air supply pipe group is arranged above the suspended ceiling (2), and is characterized in that: the air supply box (1) is located below the suspended ceiling (2), and the air supply pipe group comprises a main air pipe (3) connected to a static pressure box (301) at one end and at least two branch air pipes (4) each connected to the other end of the main air pipe (3), and the end of the branch air pipe (4) away from the main air pipe (3) is connected to the air supply box (1) via a connecting pipe (5); A plurality of frames (7) are arranged at intervals in the branch air duct (4) along its length direction, the four outer walls of each of the frames (7) are in contact with the inner wall surface of the branch air duct (4), and a pressure plate (704) is rotatably mounted on each of the two opposite inner walls of the frame (7). One end of a connecting rod (6) extending along the length direction of the branch air duct (4) passes through the plurality of frames (7) and is arranged between any two pressure plates (704) symmetrically arranged on the inner wall of the same frame (7), and a second slide groove (705) is provided on the pressure plate (704), and the second slide groove (705) extends from an area close to the inner wall of the frame (7) to an area close to the connecting rod (6), and a second slider (706) slidably mounted in the second slide groove (705) is connected to the connecting rod (6) through a steel bar (708), and the other end of the connecting rod (6) protrudes out of the branch air duct (4) and is connected to a driving component; The driving assembly comprises: a mounting sleeve (8) arranged above the suspended ceiling (2), a connecting sleeve (802) connected to one side of the mounting sleeve (8) and in communication with the mounting sleeve (8), and a sealing plate (801), wherein the sealing plate (801) is mounted on the bottom of the suspended ceiling (2) via a mounting block (803), a first electromagnetic block (804) is arranged in the mounting sleeve (8), a second electromagnetic block (805) is arranged in the connecting sleeve (802), and the second electromagnetic block (805) is connected to the end of the connecting rod (6) on a side opposite to the first electromagnetic block (804).

2. The clean air supply system according to claim 1, characterized in that: A first sliding block (701) is respectively arranged on two opposite outer walls of the frame (7); a first sliding groove (702) corresponding to the first sliding block (701) is opened on the inner wall of the branch air duct (4); one end of the first sliding block (701) is fixedly connected to the frame (7) and the other end can be slidably embedded in the first sliding groove (702) extending along the length direction of the branch air duct (4); a first spring (703) is installed in the first sliding groove (702) and on the side of the first sliding block (701) opposite to the static pressure box (301).

3. The clean air supply system according to claim 2, characterized in that: A second spring (709) is connected between the surface of the pressure plate (704) opposite to the second slide groove (705) and the inner wall of the branch air duct (4), and the elastic resistance of the second spring (709) is smaller than the elastic resistance of the first spring (703).

4. The clean air supply system according to claim 1, characterized in that: The bottom of the mounting sleeve (8) is provided with a mounting opening, and the sealing plate (801) is sealingly connected to the mounting opening.

5. The clean air supply system according to claim 1, characterized in that: The mounting block (803) is connected to the suspended ceiling (2) via screws.

6. The clean air supply system according to claim 1, characterized in that: The air supply pipe groups are provided in two groups and are symmetrically arranged on both sides above the air supply box (1).

7. The clean air supply system according to claim 6, characterized in that: Four branch air pipes (4) and four connecting pipes (5) are provided and are connected in a one-to-one correspondence.

8. The clean air supply system according to claim 6, characterized in that: The connecting rods (6) in the two branch air ducts (4) symmetrically arranged on both sides of the air supply box body (1) are located on the same axis.

9. The clean air supply system according to claim 8, characterized in that: The two sides of the installation sleeve (8) are each connected to a connection sleeve (802) having a second electromagnetic block (805) built therein.

10. The clean air supply system according to claim 1, characterized in that: One end of the steel bar (708) is connected to a universal ball head (707) mounted on the second sliding block (706), and the other end of the steel bar (708) is connected to the outer side wall of the connecting rod (6).

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