Sterilizable and disinfectable exhaust structure for negative pressure operating room

Abstract

The application discloses a sterilizable and disinfectable exhaust structure for a negative pressure operating room and belongs to the technical field of exhaust structures. The exhaust structure comprises a grille embedded and installed at the root of a wall body, the outer side of the grille is fixedly connected with an exhaust pipe, the exhaust pipe is connected with a fan system, exhaust circulation is realized, the inner side of the exhaust pipe is provided with a partition plate, and a filter screen is installed on the partition plate; the exhaust structure further comprises a cleaning assembly installed on the outer side of the filter screen, the cleaning assembly comprises a transmission shaft penetratingly and elastically rotatably installed at the middle position of the filter screen, a brush assembly is rotatably installed on the outer side of the transmission shaft, and the brush assembly is used for realizing a cleaning function; and an illumination sterilization assembly is installed on the inner side of the exhaust pipe, and the sterilization effect is improved through the illumination of an ultraviolet lamp. The sterilizable and disinfectable exhaust structure for the negative pressure operating room can realize efficient automatic cleaning and dust collection after the filter screen is blocked, ensures smooth ventilation, and can effectively disinfect and sterilize air.

Description

Technical Field

[0001] This invention relates to the technical field of exhaust structures, specifically to a sterilizable exhaust structure for negative pressure operating rooms. Background Technology

[0002] Negative pressure operating rooms are mainly used for surgery on patients with respiratory infectious diseases. Because the diseases are contagious, isolation is necessary to avoid infection during the operation. Negative pressure operating rooms require an exhaust system to purify and discharge the indoor air during normal use.

[0003] In existing technologies, such as the ventilation device for medical rooms disclosed in CN111256241B, which relates to the field of medical ventilation equipment, the problem of not being able to guarantee maximum contact between the air and the filter element is addressed. Furthermore, existing devices mostly use motors to drive fans for ventilation, which consumes computer resources and has high manufacturing costs, as well as short maintenance cycles. The device includes a housing; a rotating shaft is rotatably connected to the housing of the ventilation device for medical rooms, and a cylindrical fan is fixedly connected to the rotating shaft. Due to the setting of the baffle, when the air enters the cylindrical filter box and travels along the gap between the filter box and the filter element to the baffle position, it is blocked by the baffle, thus forcing the air to penetrate through the outer wall of the cylindrical filter element, thereby increasing the contact area between the air and the filter element and improving the filtration effect. However, during use, the filter screen does not have a certain cleaning mechanism, which makes it easy for impurities to accumulate on the outside of the filter screen after long-term use, causing blockage and affecting the ventilation effect.

[0004] For example, an operating room air purification device with publication number CN115654600A includes: an air intake group, an exhaust group, and a purifier. Both the air intake group and the exhaust group are installed on the roof of the operating room. Both groups are connected to the purifier via a constant pressure distributor. The air intake group contains a dust-fixing and sterilization component, and the purifier has two fans, one for intake and one for exhaust. This design allows for constant pressure control within the operating room without electronic devices, preventing breathing difficulties, stuffiness, and hypoxia in doctors and patients in semi-sealed operating rooms with fluctuating air pressure. It also ensures a sterile environment in the operating room. However, it lacks a filter cleaning mechanism, which can cause filter clogging, affecting normal ventilation and thus the constant pressure regulation effect.

[0005] For example, the operating room air purification system disclosed in CN115711446A includes: a circulation unit containing a filter, a laminar flow air supply box, a fresh air unit, and a return air inlet located below the laminar flow air supply box. The circulation unit is connected to the return air inlet and the laminar flow air supply box through a return air pipe and an air supply pipe, respectively. The fresh air unit is connected to the circulation unit through an air inlet pipe. A strip of flexible bristles for contacting the filter screen surface is installed on the brush rod. The left and right frame plates of the frame are respectively provided with a first lint-adhesive strip and a second lint-adhesive strip parallel to the brush rod and corresponding to the strip of flexible bristles. The length of the screw between the first and second fixed plates is greater than the length of the filter screen, so that the strip of flexible bristles on the brush rod can contact the first and second lint-adhesive strips under the action of the screw sleeve. This invention avoids the lint being swept away and causing secondary pollution in the area near the return air vent of the return air duct. However, it requires a separate drive device to drive the cleaning structure during use, and the cleaning direction of its bristles is singular, making it impossible to clean lint and dust stuck at different angles, which has certain defects in use. Summary of the Invention

[0006] The purpose of this invention is to provide a sterilizable exhaust structure for negative pressure operating rooms, in order to solve the problem mentioned in the background art that current negative pressure operating room exhaust structures on the market cannot automatically clean the filtration mechanism.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a sterilizable exhaust structure for a negative pressure operating room, comprising a grille embedded in the base of the wall, an exhaust pipe fixedly connected to the outside of the grille, and the exhaust pipe connected to a fan system to achieve exhaust circulation; a partition is installed on the inside of the exhaust pipe, and a filter screen is installed on the partition; a filter and an ultraviolet lamp are also fixedly installed in the exhaust pipe to achieve sterilization.

[0008] It also includes: a cleaning component, installed on the outside of the filter screen, the cleaning component including a drive shaft that is elastically rotatably installed through the middle of the filter screen, and a brush assembly that is rotatably installed on the outside of the drive shaft to achieve the cleaning function;

[0009] A drive shaft is rotatably mounted in the middle of the filter. A fan blade is fixedly mounted on the outer side of the drive shaft, and a connecting component is mounted on the inner side of the drive shaft to achieve connection and transmission with the drive shaft.

[0010] The light-based sterilization component is installed inside the exhaust pipe and uses ultraviolet light to enhance the sterilization effect.

[0011] Preferably, two guide rails are symmetrically fixedly installed on the inner wall of the exhaust pipe, and the guide rails and the partition are slidably connected, and a first spring is connected between the outer side of the partition and the inner wall of the guide rail.

[0012] By adopting the above technical solution, when the filter screen becomes clogged during use, the wind resistance it experiences increases, which in turn allows the baffle to slide elastically along the guide rail, achieving automatic position adjustment.

[0013] Preferably, the brush assembly includes a brush rod that is rotatably mounted on the outside of the drive shaft, and the outer side of the brush rod is evenly provided with bristles. The brush rod and the filter screen are connected by a bevel gear assembly. At the same time, bevel gears that mesh with each other are fixedly mounted on the outer side of both the brush rod and the filter screen to realize transmission. The bristles are in contact with the outer side of the filter screen.

[0014] By adopting the above technical solution, when the drive shaft rotates, it can drive multiple brush rods on its outer side to rotate synchronously, so that the bevel gears on the outer side of the brush rods and the bevel gears on the outer side of the filter screen can mesh, thereby allowing the brush rods to rotate around the filter screen, thus improving the cleaning effect.

[0015] Preferably, the connecting assembly includes a connecting piece slidably mounted on the inner side of the right end of the drive shaft, and the connecting piece and the left end of the drive shaft form a magnetic attraction structure, and the connecting piece and the drive shaft are keyed together, while a second spring is connected between the left end of the connecting piece and the inner wall of the groove at the right end of the drive shaft.

[0016] By adopting the above technical solution, when the filter screen moves to the left under the action of wind, the drive shaft and the connecting part come closer together, so that the connecting part will slide elastically under the action of magnetic force and connect with the left end of the drive shaft by key, thus realizing the transmission connection.

[0017] Preferably, a piston block is interference-fitted to the inner side of the brush rod, and a push rod is fixedly mounted to the outer side of the piston block. The push rod passes through the top of the brush rod and forms a telescopic structure with it. At the same time, a third spring is connected between the piston block and the bottom inner wall of the brush rod, and the top of the push rod is in contact with the inner wall of the exhaust pipe.

[0018] By adopting the above technical solution, when the brush rod rotates, it can drive the push rod to contact different positions of the exhaust pipe, so that the push rod pushes the piston block to slide elastically on the inside of the brush rod.

[0019] Preferably, an air supply pipe is uniformly connected to the outer side of the brush rod, and the air supply pipe is a flexible tube. The air supply pipe is connected to the cavity inside the brush rod, and the outer end of the air supply pipe is uniformly fixedly connected to bristles.

[0020] By adopting the above technical solution, when the piston block moves, the air supply pipe can draw in and blow air, thereby blowing away the dust remaining on the brush bristles and filter screen, and improving the cleaning effect.

[0021] Preferably, the photo-sterilization assembly includes an exhaust pipe that is slidably installed inside the exhaust pipe and a fixed plate that is fixedly installed inside the exhaust pipe. A wave-shaped photocatalyst plate is evenly arranged between the movable plates. The photocatalyst plate and the ultraviolet lamp are positioned correspondingly, and the channel between the photocatalyst plates is S-shaped.

[0022] By adopting the above technical solution, the S-shaped gas flow channel can extend the contact time between the gas and the photocatalyst plate, and thus, in conjunction with the ultraviolet lamp, the gas can be effectively sterilized.

[0023] Preferably, a first push block is fixedly connected to the left end of the drive shaft, and a second push block is attached to the outer side of the first push block. The contact surfaces of the first push block and the second push block are arranged in an inclined structure, and the second push block is fixedly installed on the outer side of the movable plate.

[0024] By adopting the above technical solution, when the fan blades rotate under the action of wind, the first push block can be driven to rotate through the drive shaft. At this time, the first push block pushes the second push block, so that the movable plate can move back and forth inside the exhaust pipe.

[0025] Preferably, the photocatalyst plate is supported by an elastic material, and the first and last ends of adjacent photocatalyst plates are fixedly connected by a connecting rod. At the same time, two adjacent photocatalyst plates are respectively fixedly connected to a movable plate and a fixed plate.

[0026] By adopting the above technical solution, when the movable plate slides, it can drive the photocatalyst plate to undergo elastic deformation. At this time, the photocatalyst plate can turbulent the gas flow, reduce the gas flow rate in the channel, and further improve the sterilization and purification effect.

[0027] Preferably, the lower end of the exhaust pipe has a through hole, and a dust collection component is fixedly installed at the through hole. A cover plate is elastically rotatably installed at the upper end of the dust collection component. A pull rope is wound around the shaft of the cover plate, and the other end of the pull rope is fixedly connected to the outside of the partition. A collection drawer is telescopically provided in the dust collection component.

[0028] By adopting the above technical solution, when the partition moves, the cover can be rotated by pulling the rope. When the partition gradually returns to its original position, the swept-off impurities can be discharged into the dust collection component, which can then be centrally processed through the collection drawer.

[0029] Compared with the prior art, the beneficial effects of the present invention are: the sterilizable exhaust structure for the negative pressure operating room can achieve efficient automatic cleaning and dust collection after the filter screen becomes clogged, ensuring smooth ventilation, and at the same time can effectively disinfect and sterilize the air, as detailed below;

[0030] 1. Equipped with a baffle, drive shaft and drive shaft, when the outer part of the filter screen is blocked, causing the wind resistance to increase, the baffle will slide elastically along the guide rail, which will bring the drive shaft closer to the drive shaft, so that the two are connected and transmitted through the connector. At this time, the fan blade will drive the drive shaft to rotate synchronously through the drive shaft, ensuring that the cleaning structure can be automatically started after the filter screen is partially blocked.

[0031] 2. Equipped with a brush rod, piston block, air supply pipe, and bristles, the brush rod rotates synchronously with the rotation of the drive shaft. Simultaneously, the brush rod rotates synchronously via the bevel gear assembly. The bristles on the outer side of the brush rod clean dust and impurities from the outer side of the filter screen. Meanwhile, the push rod contacts different positions on the exhaust pipe, causing the piston block to extend and retract within the brush rod. This allows the brush rod to draw in and blow out air through the air supply pipe, cleaning both the bristles and the filter screen. The filter screen can bend and its angle adjusted by the brush bristles, blowing lint, dust, and impurities in different directions, further improving the cleaning effect. A dust collection unit collects any fallen impurities for subsequent centralized processing.

[0032] 3. Equipped with a filter, ultraviolet lamp, and photocatalyst plate, the filter and ultraviolet lamp can effectively disinfect and sterilize the air. The photocatalyst plate can prolong the time that air flows on its outer side, making the reaction more complete. At the same time, when the drive shaft rotates, it can drive the movable plate to slide back and forth through the first and second push blocks, causing the photocatalyst plate to undergo elastic deformation, thereby turbulentizing the air passing on its outer side, further improving the completeness of the reaction, and achieving efficient sterilization and disinfection. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 This is a schematic cross-sectional view of the present invention;

[0035] Figure 3 This is a schematic cross-sectional view of the exhaust pipe structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the installation structure of the cleaning component of the present invention;

[0037] Figure 5 This is a schematic diagram of the three-dimensional structure of the partition of the present invention;

[0038] Figure 6 This is a schematic diagram of the connection structure between the transmission shaft and the drive shaft of the present invention;

[0039] Figure 7 This is a schematic diagram of the three-dimensional structure of the brush rod of the present invention;

[0040] Figure 8 This is a schematic cross-sectional view of the brush rod of the present invention;

[0041] Figure 9 This is a schematic diagram of the photocatalyst plate mounting structure of the present invention;

[0042] Figure 10 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0043] In the diagram: 1. Grille; 2. Exhaust pipe; 3. Partition; 4. Filter screen; 5. Filter; 6. Ultraviolet lamp; 7. Guide rail; 8. First spring; 9. Drive shaft; 10. Brush rod; 11. Bevel gear assembly; 12. Drive shaft; 13. Connector; 14. Second spring; 15. Fan blade; 16. Push rod; 17. Piston block; 18. Third spring; 19. Air supply pipe; 20. Brush bristles; 21. First push block; 22. Movable plate; 23. Second push block; 24. Fixed plate; 25. Photocatalyst plate; 26. Connecting rod; 27. Dust collection component; 28. Cover plate; 29. ​​Collection drawer. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-10 The present invention provides a technical solution: a sterilizable exhaust structure for a negative pressure operating room, comprising a grille 1 embedded in the base of the wall, an exhaust pipe 2 fixedly connected to the outside of the grille 1, and the exhaust pipe 2 connected to a fan system to achieve exhaust circulation. Meanwhile, a partition 3 is installed on the inside of the exhaust pipe 2, and a filter screen 4 is installed on the partition 3. A filter 5 and an ultraviolet lamp 6 are also fixedly installed in the exhaust pipe 2 to achieve sterilization and disinfection.

[0046] It also includes: a cleaning component, installed on the outside of the filter screen 4, the cleaning component including a drive shaft 9 that is rotatably installed through the filter screen 4 in the middle position, and a brush assembly that is rotatably installed on the outside of the drive shaft 9 for cleaning; and a drive shaft 12 that is rotatably installed through the filter 5 in the middle position, a fan blade 15 that is fixedly installed on the outside of the drive shaft 12, and a connecting component that is installed on the inside of the drive shaft 12 for connecting and transmitting power with the drive shaft 9.

[0047] Two guide rails 7 are symmetrically fixedly installed on the inner wall of the exhaust pipe 2, and the guide rails 7 and the partition 3 are slidably connected. A first spring 8 is connected between the outer side of the partition 3 and the inner wall of the guide rail 7. The connecting assembly includes a connecting piece 13 slidably installed on the inner side of the right end of the drive shaft 12. The connecting piece 13 and the left end of the drive shaft 9 form a magnetic attraction structure, and the connecting piece 13 and the drive shaft 9 are keyed together. At the same time, a second spring 14 is connected between the left end of the connecting piece 13 and the inner wall of the groove at the right end of the drive shaft 9.

[0048] like Figures 1-7 and Figure 10 As shown, when the fan is started, the exhaust pipe 2 draws gas from inside the operating room through the grille 1 to achieve gas disinfection, sterilization, and circulation. At the same time, the filter screen 4 can perform primary filtration of the air. When the filter screen 4 is partially blocked, the wind resistance it experiences increases, causing the partition 3 to slide along the guide rail 7. When the partition 3 slides close to the drive shaft 12, the connector 13 will elastically extend and retract under the action of magnetic force, thereby engaging with the left end of the drive shaft 9 for transmission. At this time, the fan blades 15 on the outside of the drive shaft 12 will rotate under the action of wind force, thereby driving the drive shaft 9 to rotate synchronously through the drive shaft 12, so that the cleaning component can clean the filter screen 4. After cleaning is completed, the wind resistance of the filter screen 4 decreases, allowing the partition 3 to reset.

[0049] The brush assembly includes a brush rod 10 that is rotatably mounted on the outside of the drive shaft 9, and brush bristles 20 are evenly arranged on the outside of the brush rod 10. The brush rod 10 and the filter screen 4 are connected by a bevel gear assembly 11. Meanwhile, bevel gears that mesh with each other are fixedly installed on the outside of both the brush rod 10 and the filter screen 4 to achieve transmission. The brush bristles 20 are attached to the outside of the filter screen 4.

[0050] A piston block 17 is installed on the inner side of the brush rod 10 with an interference fit, and a push rod 16 is fixedly installed on the outer side of the piston block 17. The push rod 16 passes through the top of the brush rod 10 and forms a telescopic structure with it. At the same time, a third spring 18 is connected between the piston block 17 and the bottom inner wall of the brush rod 10, and the top of the push rod 16 is in contact with the inner wall of the exhaust pipe 2.

[0051] An air supply pipe 19 is evenly connected to the outer side of the brush rod 10. The air supply pipe 19 is a flexible tube and is connected to the cavity inside the brush rod 10. At the same time, bristles 20 are evenly fixedly connected to the outer end of the air supply pipe 19.

[0052] like Figures 3-4 and Figures 7-8As shown, with the rotation of the drive shaft 9, it drives multiple brush rods 10 on its outer side to rotate synchronously. At the same time, the brush rods 10 rotate synchronously under the transmission of the bevel gear assembly 11, so that the bristles 20 on the outer side of the brush rods 10 can effectively clean the impurities and dust on the filter screen 4. Simultaneously, with the rotation of the drive shaft 9, the push rod 16 at the end of the brush rod 10 will contact different positions of the exhaust pipe 2, so that the push rod 16 pushes the piston block 17 to elastically extend and retract inside the brush rod 10. This allows the brush rod 10 to draw in and blow out air through the air supply pipe 19, thereby cleaning the bristles 20 and the filter screen 4. At the same time, the air supply pipe 19 can elastically deform and change direction after the bristles 20 are obstructed, so that the air supply pipe 19 can blow air at different angles to different positions on the filter screen 4, effectively improving the cleaning effect of impurities attached to the filter screen 4.

[0053] The lower end of the exhaust pipe 2 has a through hole, and a dust collection component 27 is fixedly installed at the through hole. A cover plate 28 is elastically rotatably installed at the upper end of the dust collection component 27. A pull rope is wound around the shaft of the cover plate 28, and the other end of the pull rope is fixedly connected to the outside of the partition 3. A collection drawer 29 is telescopically installed in the dust collection component 27. When the partition 3 moves, it can pull the cover plate 28 to rotate through the pull rope. When the partition 3 returns to its original position, the impurities brushed off on its outside can be shaken off into the dust collection component 27. They can then be centrally processed by pulling out the collection drawer 29. When the partition 3 returns to its original position, the drive shaft 9 will elastically return to its original position, causing it to drive the drive shaft 12 to rotate in the opposite direction, thereby reducing the airflow at the filter screen 4 and making it easier for the brushed-off impurities to fall off.

[0054] A photo-sterilization assembly is installed inside the exhaust pipe 2, and the sterilization effect is enhanced by the illumination of the ultraviolet lamp 6. The photo-sterilization assembly includes an exhaust pipe 2 that is slidably installed inside the exhaust pipe 2 and a fixed plate 24 that is fixedly installed inside the exhaust pipe 2. A wave-shaped photocatalyst plate 25 is evenly arranged between the movable plate 22 and the ultraviolet lamp 6. The photocatalyst plate 25 and the ultraviolet lamp 6 are positioned correspondingly, and the channel between the photocatalyst plate 25 is S-shaped.

[0055] A first push block 21 is fixedly connected to the left end of the drive shaft 12, and a second push block 23 is attached to the outer side of the first push block 21. The contact surfaces of the first push block 21 and the second push block 23 are arranged at an angle. The second push block 23 is fixedly installed on the outer side of the movable plate 22. The photocatalyst plate 25 is supported by an elastic material, and the first and second ends of adjacent photocatalyst plates 25 are fixedly connected by a connecting rod 26. Two adjacent photocatalyst plates 25 are respectively fixedly connected to the movable plate 22 and the fixed plate 24.

[0056] like Figures 2-3 and Figure 9As shown, when the drive shaft 12 rotates, the first push block 21 at its end will intermittently abut against and push the second push block 23, causing the movable plate 22 to slide back and forth inside the exhaust pipe 2, thereby changing the flow direction of the air flowing through the outside of the photocatalyst plate 25 and achieving a turbulence effect. In conjunction with the ultraviolet lamp 6, the air can be effectively sterilized and disinfected.

[0057] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sterilizable exhaust structure for a negative pressure operating room, comprising a grille (1) embedded in the base of a wall, an exhaust pipe (2) fixedly connected to the outside of the grille (1), and the exhaust pipe (2) connected to a fan system to achieve exhaust circulation. Meanwhile, a partition (3) is installed on the inside of the exhaust pipe (2), and a filter screen (4) is installed on the partition (3). A filter (5) and an ultraviolet lamp (6) are also fixedly installed in the exhaust pipe (2) to achieve sterilization. Its features are, Also includes: A cleaning component is installed on the outside of the filter screen (4). The cleaning component includes a drive shaft (9) that is elastically rotatably installed through the middle of the filter screen (4). A brush assembly is rotatably installed on the outside of the drive shaft (9) to achieve the cleaning function. A drive shaft (12) is rotatably mounted in the middle of the filter (5). A fan blade (15) is fixedly mounted on the outside of the drive shaft (12), and a connecting component is mounted on the inside of the drive shaft (12) to realize the connection and transmission with the transmission shaft (9). The connecting component includes a connecting piece (13) slidably mounted on the inside of the right end of the drive shaft (12), and the connecting piece (13) and the left end of the transmission shaft (9) form a magnetic attraction structure. The connecting piece (13) and the transmission shaft (9) are keyed together. At the same time, a second spring (14) is connected between the left end of the connecting piece (13) and the inner wall of the groove at the right end of the transmission shaft (9). The light sterilization component is installed inside the exhaust pipe (2) and the sterilization effect is improved by the light of the ultraviolet lamp (6).

2. The sterilizable exhaust structure for a negative pressure operating room according to claim 1, characterized in that: The inner wall of the exhaust pipe (2) is symmetrically fixed with two guide rails (7), and the guide rails (7) and the partition (3) are slidably connected. A first spring (8) is connected between the outer side of the partition (3) and the inner wall of the guide rail (7).

3. The sterilizable exhaust structure for a negative pressure operating room according to claim 1, characterized in that: The brush assembly includes a brush rod (10) that is uniformly rotatably mounted on the outside of the drive shaft (9), and brush bristles (20) are uniformly arranged on the outside of the brush rod (10). The brush rod (10) and the filter screen (4) are connected by a bevel gear assembly (11). At the same time, bevel gears that mesh with each other are fixedly installed on the outside of both the brush rod (10) and the filter screen (4) to realize transmission. The brush bristles (20) are attached to the outside of the filter screen (4).

4. The sterilizable exhaust structure for a negative pressure operating room according to claim 3, characterized in that: A piston block (17) is installed on the inner side of the brush rod (10) with an interference fit, and a push rod (16) is fixedly installed on the outer side of the piston block (17). The push rod (16) passes through the top of the brush rod (10) and forms a telescopic structure with it. At the same time, a third spring (18) is connected between the piston block (17) and the bottom inner wall of the brush rod (10). The top of the push rod (16) is attached to the inner wall of the exhaust pipe (2).

5. A sterilizable exhaust system for a negative pressure operating room according to claim 4, characterized in that: The outer side of the brush rod (10) is uniformly connected with an air supply pipe (19), and the air supply pipe (19) is a flexible tube. The air supply pipe (19) is connected to the cavity inside the brush rod (10), and the outer end of the air supply pipe (19) is uniformly fixedly connected with bristles (20).

6. The sterilizable exhaust structure for a negative pressure operating room according to claim 1, characterized in that: The photo-sterilization assembly includes an exhaust pipe (2) that is slidably installed inside the exhaust pipe (2) and a fixed plate (24) that is fixedly installed inside the exhaust pipe (2). A wave-shaped photocatalyst plate (25) is evenly arranged between the movable plate (22) and the movable plate (22). The photocatalyst plate (25) and the ultraviolet lamp (6) are positioned correspondingly, and the channel between the photocatalyst plates (25) is S-shaped.

7. The sterilizable exhaust structure for a negative pressure operating room according to claim 1, characterized in that: The left end of the drive shaft (12) is fixedly connected to a first push block (21), and a second push block (23) is attached to the outside of the first push block (21). The contact surfaces of the first push block (21) and the second push block (23) are arranged in an inclined structure. Meanwhile, the second push block (23) is fixedly installed on the outside of the movable plate (22).

8. A sterilizable exhaust system for a negative pressure operating room according to claim 6, characterized in that: The photocatalyst plate (25) is made of elastic material, and the ends of adjacent photocatalyst plates (25) are fixedly connected by connecting rods (26). At the same time, two adjacent photocatalyst plates (25) are fixedly connected to the movable plate (22) and the fixed plate (24) respectively.

9. A sterilizable exhaust system for negative pressure operating rooms according to claim 1, characterized in that: The lower end of the exhaust pipe (2) is provided with a through hole, and a dust collection component (27) is fixedly installed at the through hole. The upper end of the dust collection component (27) is elastically rotatably installed with a cover plate (28). At the same time, a pull rope is wound around the shaft of the cover plate (28), and the other end of the pull rope is fixedly connected to the outside of the partition (3). A collection drawer (29) is telescopically provided in the dust collection component (27).

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