A one-way dust-proof clean room ventilation structure

Abstract

This invention discloses a unidirectional dustproof ventilation structure for cleanrooms, comprising a ventilation duct with an air inlet pipe fixed to its back and air outlet channels evenly spaced on the inner bottom surface of the duct; it also includes a connecting shaft with a bearing passing through the interior of the ventilation duct, the end of which is driven by a worm gear mechanism meshing with the top of an adjusting rod; a servo motor installed at one end of the ventilation duct, the output shaft of which is fixedly connected to a movable tube, which is rotatably disposed inside the fixed tube; and a waste outlet fixed at the other end of the ventilation duct. This unidirectional dustproof ventilation structure for cleanrooms can adjust the number of air outlet channels connected according to ventilation needs, thus achieving energy savings. Furthermore, after filtering dust during ventilation, it can periodically and automatically clean up the intercepted dust, ensuring smooth airflow during subsequent ventilation.

Description

Technical Field

[0001] The invention relates to the technical field of clean room ventilation, in particular to a one-way dustproof ventilation structure for a clean room. Background Art

[0002] A clean room refers to a well-sealed space that controls parameters such as air cleanliness, temperature and humidity. In order to ensure ventilation inside the clean room during use, a ventilation structure needs to be set up to pass purified gas from the outside into the clean room, and the ventilation structure can transmit it to different locations according to needs. For example, a ventilation device with a purification structure for a clean room with publication number CN118089152B includes: a filter box and a first air inlet pipe, the first air inlet pipe is arranged on the right side of the filter box, and the inner cavity of the first air inlet pipe is connected to the inner cavity of the filter box; when the filter is seriously blocked or gas leaks at the pipe connection, an alarm can be issued in time to remind the staff to perform maintenance, thereby preventing the formation of negative pressure in the clean room, preventing external pollutants from flowing into the clean room, and preventing the temperature, humidity, static electricity, dust and other factors in the clean room from being uncontrollable, increasing the stability and consistency of the production process, and enhancing product quality;

[0003] For example, a local ventilation and purification treatment device for clean rooms with publication number CN117073089B includes a mounting cylinder, which is mounted on the outside of the clean room wall, and a filter assembly that can be used for ventilation and purification is arranged inside the mounting cylinder; an adjustment assembly, which is arranged inside the mounting cylinder, and the adjustment assembly drives the filter assembly to rotate through the first gear and the second gear at one end to adjust the position during cleaning; a cleaning assembly, which is arranged inside the mounting cylinder, and by setting the cleaning assembly, the dust on the filter assembly and the impurities filtered out from the inside can be cleaned, the filter assembly can be cleaned more fully, and the filter assembly can be cleaned automatically, which is convenient to clean. However, the above-mentioned ventilation device for clean rooms still has the following disadvantages during actual use:

[0004] 1. The position and number of air outlets of traditional clean room ventilation devices are mostly fixed, which makes it inconvenient to adjust the number of connected air outlets according to ventilation needs, so the energy-saving effect is poor;

[0005] 2. In addition, after the traditional clean room ventilation device filters the dust during the ventilation process, it is not convenient to automatically clean and discharge the filtered dust, which in turn affects the smoothness of gas circulation during subsequent ventilation.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original ventilation structure. Summary of the invention

[0007] The object of the present invention is to provide a one-way dust-proof clean room ventilation structure to solve the problem that the positions and numbers of air outlets of traditional clean room ventilation devices proposed in the above-mentioned background technology are mostly fixed, which makes it inconvenient to adjust the number of connected air outlets according to ventilation needs, and after traditional clean room ventilation devices filter dust during ventilation, it is inconvenient to automatically clean and discharge the filtered dust, which affects the smoothness of gas circulation during subsequent ventilation.

[0008] To achieve the above object, the present invention provides the following technical solution: a one-way dustproof clean room ventilation structure, comprising a ventilation duct, an air inlet pipe is fixed on the back of the ventilation duct, a fixed pipe is arranged inside the ventilation duct, and connection holes are reserved at equal intervals on the front of the fixed pipe, and air outlet channels are opened at equal intervals on the inner bottom surface of the ventilation duct, and the length and width of the upper end of the air outlet channel are smaller than the length and width of the lower end thereof;

[0009] It also includes: a connecting shaft, a bearing that runs through the interior of the ventilation duct, and an end of the connecting shaft is meshed and driven with the top of the adjusting rod through a worm gear mechanism, and the adjusting rod rotates and runs through the bottom of the ventilation duct;

[0010] A servo motor is installed at one end of the ventilation duct, the output shaft of the servo motor is fixedly connected to a movable tube, and the movable tube is rotatably arranged inside the fixed tube, and a dust removal component is arranged inside the movable tube, and a waste outlet is fixed at the other end of the ventilation duct.

[0011] Preferably, the air inlet pipe, fixed pipe, movable pipe, connecting hole, ventilation duct and air outlet channel constitute a ventilation channel, and a 1 / 4 grid structure is provided at a position of the movable pipe near the connecting hole, and space is left between the outer wall of the fixed pipe and the inner wall of the movable pipe, so that when the gas is transmitted to the interior of the movable pipe, dust can be intercepted by the grid thereon.

[0012] Preferably, the outer fixed sleeve of the connecting shaft is provided with a guide plate, and the guide plates are distributed at equal intervals, and the edges of the guide plates are arc-shaped structures. At the same time, the angle between adjacent guide plates is 30°. In this way, when the connecting shaft drives the guide plates to rotate, it first drives the middle guide plate to contact the movable plate, and then drives the guide plates on both sides to contact the movable plate in turn.

[0013] Preferably, a movable plate is provided below the guide plate, and the upper surface of the movable plate is a curved structure, and both sides of the movable plate are in close contact with the inner wall of the upper end of the air outlet channel. At the same time, a connecting rod is fixed to the lower end surface of the movable plate, and when the movable plate is pushed, the connecting rod can be driven to slide down synchronously.

[0014] Preferably, the connecting rod is slidably connected to the plate on the inner wall of the air outlet channel, and a spring for returning the movable plate to its original position is wound around the outer side of the connecting rod, and the guide plate, the movable plate and the air outlet channel are arranged in a one-to-one correspondence, and a gap is generated between the movable plate and the air outlet channel after it is lowered, so that gas can enter easily.

[0015] Preferably, the dust removal assembly includes a first brush symmetrically arranged on the inner wall of the fixed tube, and the first brush contacts the grid of the outer wall of the movable tube, and a limiting ring made of rubber material is pasted on the fixed tube on the side of the connecting hole, and the length and width of the limiting ring are both larger than the inner diameter of the connecting hole. After the movable tube rotates, it can contact the first brush and sweep away the dust intercepted by its outer wall.

[0016] Preferably, the solid position of the movable tube passes through the limiting rod, and the limiting rod is an inverted "U"-shaped structure, and the limiting rod and the movable tube are slidably connected. At the same time, a fixing groove is reserved on the movable tube outside the limiting rod, and the contact between the guide block and the limiting rod can drive the limiting rod to limit the position of the fixed plate.

[0017] Preferably, a spring is wound around the lower end of the limit rod to reset it, and a guide block is fixed to the inner wall of the fixed tube above the limit rod, and the bottom of the guide block is in close contact with the top of the limit rod. When the limit rod is separated from the guide block, the elasticity of the spring can drive the limit rod to approach the inner wall of the fixed tube.

[0018] Preferably, a movable shaft passes through the interior of the movable tube, and the movable shaft and the ventilation duct are rotatably connected, and a fixed plate is provided on the outside of the movable shaft, and the fixed plates are distributed at equal angles, and a second brush is fixed at the edge of the fixed plate, and the second brush is in contact with the grid on the inner wall of the movable tube. When the gas blows the fixed plate, it can drive it to rotate and drive the second brush to sweep the inner wall of the movable tube.

[0019] Preferably, a first partition plate is fixed at an equal angle to the inner wall of one end of the movable tube near the waste outlet, and the first partition plate and the second partition plate are in close contact, and the second partition plate is fixed at an equal angle to one end of the fixed tube near the waste outlet, and the first partition plate and the second partition plate are staggered. When the first partition plate and the second partition plate are staggered, the fixed tube and the waste outlet can be separated, and when the first partition plate and the second partition plate are staggered, the fixed tube and the waste outlet can be connected.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the one-way dust-proof clean room ventilation structure can adjust the number of connected air outlet channels according to the ventilation needs, so it can play a role in energy saving, and after filtering the dust during the ventilation process, it can automatically clean the intercepted dust regularly to ensure the smoothness of gas circulation during subsequent ventilation. The specific contents are as follows:

[0021] 1. When the adjusting rod rotates, the meshing transmission of the worm gear mechanism drives the connecting shaft to rotate synchronously, and then the connecting shaft drives the guide plate to rotate. After the rotation, the guide plate in the middle position first contacts the movable plate and pushes the movable plate down. When the connecting shaft continues to rotate, it can sequentially drive the guide plates at both ends to contact the corresponding movable plates. When the movable plate is lowered, a gap is generated between the movable plate and the air outlet channel, so that the gas in the ventilation duct can be transmitted to the air outlet channel, which is convenient for adjusting the number of connected air outlet channels according to ventilation needs, and can reduce gas waste;

[0022] 2. When it is necessary to clean the dust intercepted on the movable tube, the servo motor drives the movable tube to rotate 90° and drives the first partition plate to rotate synchronously. After the first partition plate rotates, it overlaps with the second partition plate, so that the gap between the two is completely open. During the rotation of the movable tube, on the one hand, the core part of the movable tube is driven to contact the connecting hole and is blocked by the limit ring. In this way, when the subsequent gas enters again, it will not be discharged from the connecting hole, but enter the movable tube and the gap between the movable tube and the fixed tube;

[0023] On the other hand, the movable tube can also drive the grid on it to contact with the first brush to sweep away the dust on the outer surface of the grid. At the same time, after the movable tube rotates, it drives the limit rod to separate from the guide block, thereby releasing the limit on the fixed plate. When the gas continues to be transmitted to the inside of the movable tube, it can contact the fixed plate and drive the fixed plate and the movable shaft to rotate. The fixed plate can drive the second brush to contact the grid on the movable tube to sweep away the dust on the inner wall of the grid. When the second brush contacts the movable tube, the bristles can pass through its grid to clear the grid and ensure the smoothness of subsequent gas circulation.

[0024] Furthermore, the dust swept away by the input gas can be discharged from the movable tube and the space between the movable tube and the fixed tube, thereby automatically cleaning the dust. After cleaning, the servo motor drives the movable tube to rotate 90° in the opposite direction. On the one hand, the waste outlet is blocked by the partition plate, and on the other hand, the movable tube is connected to the connecting hole. Then, the horizontal limit rod is driven back to the vertical state and re-contacted with the guide block. The push of the guide block can drive the limit rod to slide down and get stuck on both sides of the vertical fixed plate to limit the fixed plate. In this way, the gas will not drive the fixed plate to rotate in the ventilation state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the front cross-section structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the side structure of the guide plate of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure after the guide plate of the present invention rotates;

[0029] Figure 5 It is a schematic diagram of the side section structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the side cross-sectional structure of the fixed pipe of the present invention;

[0031] Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0032] Figure 8 This is a schematic diagram of the structure of the movable tube after rotation of the present invention;

[0033] Fig. 9 This is a bottom view of the fixed tube structure of the present invention;

[0034] Fig.10 It is a partial front view structural schematic diagram of the movable tube of the present invention;

[0035] Fig.11 This is a schematic diagram of the connection structure between the servo motor and the movable tube of the present invention;

[0036] Fig.12 It is a schematic diagram of a partial cross-sectional structure of a fixed tube and a movable tube of the present invention;

[0037] Fig.13 It is a schematic diagram of the side structure of the partition plate of the present invention.

[0038] In the figure: 1. ventilation duct; 2. air inlet pipe; 3. fixed pipe; 4. connecting hole; 5. air outlet channel; 6. connecting shaft; 7. worm gear mechanism; 8. adjusting rod; 9. guide plate; 10. movable plate; 11. connecting rod; 12. servo motor; 13. movable pipe; 14. first brush; 15. limiting ring; 16. limiting rod; 17. fixing groove; 18. guide block; 19. movable shaft; 20. fixed plate; 21. second brush; 22. first partition plate; 23. second partition plate; 24. waste outlet. DETAILED DESCRIPTION

[0039] 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.

[0040] See also Figure 1-Figure 13 , the present invention provides the following technical solutions:

[0041] Embodiment 1: In order to solve the problems existing in the prior art, the present embodiment adopts the following technical scheme: a one-way dustproof clean room ventilation structure, comprising a ventilation duct 1, an air inlet pipe 2 is fixed on the back of the ventilation duct 1, a fixed pipe 3 is arranged inside the ventilation duct 1, and connection holes 4 are reserved at equal intervals on the front of the fixed pipe 3, and air outlet channels 5 are opened at equal intervals on the inner bottom surface of the ventilation duct 1, and the length and width of the upper end of the air outlet channel 5 are smaller than the length and width of the lower end; it also includes: a connecting shaft 6, the bearing of which passes through the interior of the ventilation duct 1, and the end of the connecting shaft 6 is meshed and driven by a worm gear mechanism 7 and the top of an adjusting rod 8, and the adjusting rod 8 rotates and passes through the bottom of the ventilation duct 1; a servo motor 12, which is installed at one end of the ventilation duct 1, and the servo motor 1 2 is fixedly connected with the output shaft thereof, and the movable tube 13 is rotatably arranged inside the fixed tube 3, and a dust removal assembly is arranged inside the movable tube 13, and a waste outlet 24 is fixedly arranged at the other end of the ventilation duct 1; firstly, the external gas enters the fixed tube 3 from the air inlet pipe 2, and then the dust in the gas is filtered through the grid shape on the movable tube 13, which plays a one-way dust-proof role, and then is transmitted to the ventilation duct 1 through the connecting hole 4, and finally can be discharged from the air outlet channel 5, so as to realize the ventilation in the clean room. During the ventilation process, the number of connected air outlet channels 5 can be adjusted according to the demand, so as to play the role of energy saving, and the dust filtered on the movable tube 13 can be cleaned regularly, which ensures the cleanliness of the ventilation gas on the one hand, and the smoothness of the ventilation of the duct on the other hand.

[0042] The positions and numbers of the air outlets of the existing clean room ventilation devices are mostly fixed, which makes it inconvenient to adjust the number of air outlets according to ventilation requirements, so the energy saving effect is poor. Figure 1-Figure 5 and Fig.10As shown, the air inlet pipe 2, the fixed pipe 3, the movable pipe 13, the connecting hole 4, the ventilation duct 1 and the air outlet channel 5 form a ventilation channel, and the movable pipe 13 is provided with a 1 / 4 grid structure near the connecting hole 4, and a space is left between the outer wall of the fixed pipe 3 and the inner wall of the movable pipe 13; the outer fixed sleeve of the connecting shaft 6 is provided with a guide plate 9, and the guide plates 9 are distributed at equal intervals, and the edges of the guide plates 9 are arc-shaped structures, and the angle between adjacent guide plates 9 is 30°; a movable plate 10 is provided below the guide plate 9, and the movable plate 10 is provided at the bottom of the guide plate 9. The upper surface of the movable plate 10 is a curved structure, and the two sides of the movable plate 10 are in contact with the inner wall of the upper end of the air outlet channel 5, and a connecting rod 11 is fixed to the lower end surface of the movable plate 10; the connecting rod 11 is slidably connected to the plate of the inner wall of the air outlet channel 5, and a spring for resetting the movable plate 10 is wound around the outer side of the connecting rod 11, and the guide plate 9, the movable plate 10 and the air outlet channel 5 are arranged one by one; the external gas can filter the dust through the grid on the movable tube 13, and then be transmitted to the ventilation duct 1 through the connecting hole 4 The air enters the air outlet passage 5 and is discharged to supply air to the clean room. The adjusting rod 8 can be rotated according to the demand of the ventilation range, and the meshing transmission of the worm gear mechanism 7 drives the connecting shaft 6 to rotate synchronously, and then the connecting shaft 6 drives the guide plate 9 to rotate. After the rotation, the guide plate 9 in the middle position first contacts the movable plate 10, and pushes the movable plate 10 to descend and drives the connecting rod 11 to slide down. When the connecting shaft 6 continues to rotate, it can sequentially drive the guide plates 9 at both ends to contact the corresponding movable plates 10. When the movable plate 10 descends, a gap is generated between the movable plate 10 and the air outlet passage 5, so that the gas in the ventilation duct 1 can be transmitted to the air outlet passage 5, and the arc surface on the upper end surface of the movable plate 10 has a guiding effect on the circulation of the gas, so that the number of connected air outlet passages 5 can be adjusted according to the ventilation demand, which can reduce the waste of gas. When the number of air outlets needs to be reduced, the adjusting rod 8 is rotated in the opposite direction to release the pressure of the guide plate 9 on the movable plate 10 in turn, so that the connecting rod 11 and the movable plate 10 can be driven to rise by the resilience of the spring, and the air outlet passage 5 is blocked again.

[0043] Embodiment 2: After the existing clean room ventilation device filters the dust during the ventilation process, it is not convenient to automatically clean and discharge the filtered dust, which affects the smoothness of the gas flow during the subsequent ventilation. Therefore, this embodiment adopts the following technical solutions, such as Figure 6-Figure 13As shown, the dust removal assembly includes a first brush 14 symmetrically arranged on the inner wall of the fixed tube 3, and the first brush 14 is in contact with the grid of the outer wall of the movable tube 13, and a limit ring 15 made of rubber material is pasted on the fixed tube 3 on the side of the connecting hole 4, and the length and width of the limit ring 15 are both larger than the inner diameter of the connecting hole 4; the solid position of the movable tube 13 passes through a limit rod 16, and the limit rod 16 is an inverted "U"-shaped structure, and the limit rod 16 and the movable tube 13 are slidably connected, and a fixing groove 17 is reserved on the movable tube 13 outside the limit rod 16; the lower end of the limit rod 16 is wrapped with a spring for resetting it, and a guide block 18 is fixed to the inner wall of the fixed tube 3 above the limit rod 16, and the bottom of the guide block 18 The movable tube 13 is fitted with the top of the limiting rod 16; a movable shaft 19 runs through the inside of the movable tube 13, and the movable shaft 19 and the ventilation duct 1 are rotatably connected, and a fixed plate 20 is arranged on the outside of the movable shaft 19, and the fixed plates 20 are distributed at equal angles, and a second brush 21 is fixed at the edge of the fixed plate 20, and the second brush 21 is in contact with the grid of the inner wall of the movable tube 13; a first partition plate 22 is fixed at equal angles to the inner wall of one end of the movable tube 13 near the waste outlet 24, and the first partition plate 22 and the second partition plate 23 are in fit contact, and the second partition plate 23 is fixed at equal angles to one end of the fixed tube 3 near the waste outlet 24, and the first partition plate 22 and the second partition plate 23 are staggered;When the gas is discharged from the connecting hole 4, the first partition plate 22 and the second partition plate 23 are in a staggered state, so that the gas can be prevented from being discharged from the exhaust port 24. When the grid on the movable tube 13 needs to be cleaned, the movable tube 13 is driven by the servo motor 12 to rotate 90°, and the movable tube 13 drives the first partition plate 22 to rotate synchronously. After the first partition plate 22 rotates 90°, it overlaps with the second partition plate 23, so that the gap between the two is completely open. During the rotation of the movable tube 13, on the one hand, it drives its core part to contact with the connecting hole 4, and is blocked by the limit ring 15. In this way, when the subsequent gas enters again, it will not be discharged from the connecting hole 4, but enter the movable tube 13 and the gap between the movable tube 13 and the fixed tube 3. On the other hand, the movable tube 13 can also drive the grid thereon to contact with the first brush 14, and the dust on the outer surface of the grid can be swept off by the first brush 14. At the same time, after the movable tube 13 rotates, the limiting rod 16 is driven to separate from the guide block 18, so that the limiting rod 16 can slide toward the inner wall of the fixed tube 3 without being pushed by the resilience of the spring, thereby releasing the limit on the fixed plate 20. When the gas continues to be transmitted to the inside of the movable tube 13, it can contact with the fixed plate 20. The fixed plate 20 contacts the movable tube 13 and drives the fixed plate 20 and the movable shaft 19 to rotate, so that the movable shaft 19 drives the multiple groups of fixed plates 20 distributed at equal intervals to rotate synchronously, and the fixed plate 20 can drive the second brush 21 to contact the grid on the movable tube 13 to sweep away the dust on the inner wall of the grid. Since the bristles on the second brush 21 are relatively fine, when contacting the movable tube 13, the bristles can pass through the grid, play a role in dredging the grid, and ensure the smoothness of subsequent gas circulation. After that, the dust swept away can be blown away by the input gas, and the dust can be removed from the movable tube 13 and the movable tube 13 and the movable tube 13. The space between the fixed pipes 3 is discharged, which plays the role of automatically cleaning dust. After the cleaning is completed, the servo motor 12 drives the movable pipe 13 to rotate 90° in the opposite direction. On the one hand, the waste outlet 24 is blocked by the partition plate, and on the other hand, the movable pipe 13 is connected with the connecting hole 4. Then, the horizontal limit rod 16 is driven back to the vertical state. The limit rod 16 can contact the guide block 18 again. The limit rod 16 can be driven by the push of the guide block 18 to slide down and get stuck on both sides of the vertical fixed plate 20 to limit the fixed plate 20. In this way, the gas will not drive the fixed plate 20 to rotate in the ventilation state. ;

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way dustproof clean room ventilation structure, comprising a ventilation duct (1), an air inlet pipe (2) being fixed on the back of the ventilation duct (1), a fixed pipe (3) being arranged inside the ventilation duct (1), and connection holes (4) being reserved at equal intervals on the front of the fixed pipe (3), and air outlet channels (5) being opened at equal intervals on the inner bottom surface of the ventilation duct (1), and the length and width of the upper end of the air outlet channel (5) being smaller than the length and width of the lower end thereof; It is characterized in that Also includes: A connecting shaft (6), the bearing of which passes through the interior of the ventilation duct (1), and the end of the connecting shaft (6) is meshed and driven through the worm gear mechanism (7) and the top of the adjusting rod (8), and the adjusting rod (8) rotates and passes through the bottom of the ventilation duct (1); A servo motor (12) is mounted on one end of the ventilation duct (1); an output shaft of the servo motor (12) is fixedly connected to a movable tube (13); the movable tube (13) is rotatably arranged inside the fixed tube (3); a dust removal assembly is arranged inside the movable tube (13); and a waste outlet (24) is fixedly arranged at the other end of the ventilation duct (1); The air inlet pipe (2), the fixed pipe (3), the movable pipe (13), the connecting hole (4), the ventilation duct (1) and the air outlet channel (5) form a ventilation channel, and a 1 / 4 grid structure is provided at a position of the movable pipe (13) close to the connecting hole (4), and a space is left between the outer wall of the fixed pipe (3) and the inner wall of the movable pipe (13); The outer fixed sleeve of the connecting shaft (6) is provided with a guide plate (9), and the guide plates (9) are distributed at equal intervals, and the edges of the guide plates (9) are arc-shaped structures, and the angle between adjacent guide plates (9) is 30°; A movable plate (10) is provided below the guide plate (9), and the upper surface of the movable plate (10) is a curved surface structure, and both sides of the movable plate (10) are in close contact with the inner wall of the upper end of the air outlet channel (5), and a connecting rod (11) is fixed to the lower end surface of the movable plate (10); The connecting rod (11) is slidably connected to the plate on the inner wall of the air outlet channel (5), and a spring for returning the movable plate (10) is wound around the outer side of the connecting rod (11), and the guide plate (9), the movable plate (10) and the air outlet channel (5) are arranged in a one-to-one correspondence; The dust removal component comprises a first brush (14) symmetrically arranged on the inner wall of the fixed tube (3), and the first brush (14) contacts the grid of the outer wall of the movable tube (13), and a limit ring (15) made of rubber material is adhered to the fixed tube (3) on the side of the connecting hole (4), and the length and width of the limit ring (15) are both greater than the inner diameter of the connecting hole (4).

2. A one-way dust-proof clean room ventilation structure according to claim 1, characterized in that: The solid position of the movable tube (13) passes through the limit rod (16), and the limit rod (16) is an inverted "U"-shaped structure. The limit rod (16) and the movable tube (13) are slidably connected, and a fixing groove (17) is reserved on the movable tube (13) outside the limit rod (16).

3. A one-way dust-proof clean room ventilation structure according to claim 2, characterized in that: A spring for returning the limiting rod (16) is wound around the lower end of the limiting rod (16), and a guide block (18) is fixed to the inner wall of the fixed tube (3) above the limiting rod (16), and the bottom of the guide block (18) is in close contact with the top of the limiting rod (16).

4. A one-way dust-proof clean room ventilation structure according to claim 1, characterized in that: A movable shaft (19) passes through the interior of the movable tube (13), and the movable shaft (19) and the ventilation duct (1) are rotatably connected. A fixing plate (20) is arranged outside the movable shaft (19), and the fixing plates (20) are distributed at equal angles. A second brush (21) is fixed at the edge of the fixing plate (20), and the second brush (21) contacts the grid of the inner wall of the movable tube (13).

5. The one-way dust-proof clean room ventilation structure according to claim 1, characterized in that: A first partition plate (22) is fixed at an equal angle to the inner wall of one end of the movable tube (13) close to the waste outlet (24), and the first partition plate (22) and the second partition plate (23) are in close contact with each other, and the second partition plate (23) is fixed at an equal angle to one end of the fixed tube (3) close to the waste outlet (24), and the first partition plate (22) and the second partition plate (23) are staggered.

Images