Central air conditioning ventilation pipe cleaning equipment for clean room and cleaning method thereof

Abstract

The present application relates to central air conditioning ventilation pipe technical field, disclose a kind of central air conditioning ventilation pipe cleaning equipment for dust-free room and cleaning method thereof, comprising: connecting piece, connecting piece one end is provided with connecting structure;Fixed structure, fixed structure is arranged in the side wall of connecting piece, the elastic force of first torsion spring and second torsion spring is supported for first support rod and second support rod continue to open and contract;Auxiliary moving structure, auxiliary moving structure is arranged in the side wall of fixed structure and connecting piece, by the power transmission of first transmission belt and second transmission belt, make moving wheel rotate movement;Rotary structure, rotary structure is arranged in one end of connecting piece, rotary structure includes connecting gear and connecting gear ring, rotating disc, by the transmission of connecting gear, connecting gear ring, make rotating disc rotate, the present application is guaranteed by setting fixed structure that cleaning equipment can enter into different shape ventilation pipe and carry out operation, it is convenient for staff to carry out cleaning work.

Description

Technical Field

[0001] This invention relates to the field of central air conditioning ventilation duct technology, and in particular to a cleaning device and cleaning method for central air conditioning ventilation ducts used in cleanrooms. Background Technology

[0002] Central air conditioning systems typically consist of one or more cold / heat source systems and multiple air conditioning systems. Unlike traditional refrigerant-based air conditioners, central air conditioning systems centrally process air to achieve comfort requirements. They utilize the principle of liquid vaporization refrigeration to provide cooling capacity to offset the heat load in the environment; the heating system provides the necessary heat to offset the cooling load. Central air conditioning ventilation ducts are used extensively and under heavy loads, requiring regular cleaning to maintain normal and efficient operation. Current technology typically uses high-pressure water guns to rinse the duct walls, but this is problematic because high-pressure water guns can only operate in one direction and have very limited operating space within the duct walls, resulting in a small cleaning area and making the cleaning process cumbersome. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a cleaning device for central air conditioning ventilation ducts in cleanrooms, and also provides a cleaning method for this device, in order to solve the aforementioned technical problems in the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A cleaning device and method for cleaning central air conditioning ventilation ducts in cleanrooms, comprising:

[0006] A connector, one end of which is provided with a connecting structure;

[0007] A fixing structure is provided on the side wall of the connector. The fixing structure includes a first support rod, a second support rod, a first torsion spring, and a second torsion spring. The elastic support of the first torsion spring and the second torsion spring is used for the first support rod and the second support rod to continue to open and close.

[0008] An auxiliary moving structure is provided on the side wall of the fixed structure and the connecting parts. The auxiliary moving structure includes a first motor, a first transmission belt and a second transmission belt. The moving wheel is rotated and moved by the power transmission of the first transmission belt and the second transmission belt.

[0009] A rotating structure is provided at one end of the connector. The rotating structure includes a connecting gear, a connecting gear ring, and a rotating disk. The rotating disk is rotated by the transmission of the connecting gear and the connecting gear ring.

[0010] Furthermore, the side wall of the connector is provided with a fixing structure, which includes a first rotating member and a second rotating member. The two first rotating members and the second rotating member are respectively fixedly connected to the side wall of the connector. The inner grooves of the two first rotating members and the second rotating member are respectively fixedly connected to a rotating shaft. The rotating shaft side wall on the first rotating member is rotatably connected to a first support rod, and the rotating shaft side wall on the second rotating member is rotatably connected to a second support rod.

[0011] Furthermore, one end of each of the two first support rods is rotatably connected to a first rotating shaft, and one end of each of the two second support rods is rotatably connected to a second rotating shaft. The sidewalls of the first and second rotating shafts are respectively fixedly connected to movable wheels, and the sidewalls of the plurality of rotating shafts are equipped with a first torsion spring and a second torsion spring.

[0012] Furthermore, one end of each of the two first torsion springs is fixedly connected to the inner wall of the two first support rods, and the other end of each of the two first torsion springs is fixedly connected to the inner side of the two first rotating parts. One end of each of the two second torsion springs is fixedly connected to the inner wall of the two second support rods, and the other end of each of the two second torsion springs is fixedly connected to the inner side of the two second rotating parts.

[0013] Furthermore, the auxiliary moving structure includes a first guide wheel, two first guide wheels are fixedly connected to one end of two second rotating shafts, two second rotating parts are rotatably connected to the sidewalls of the second rotating parts, two first motors are fixedly connected to the sidewalls of the connecting parts, and third guide wheels are fixedly connected to the output ends of the two first motors.

[0014] Furthermore, the grooves of the two third guide wheels and the second guide wheels are movably connected to a first transmission belt, the grooves of the two second guide wheels and the first guide wheel are movably connected to a second transmission belt, and the sidewalls of the two second guide wheels are provided with two grooves.

[0015] Furthermore, a fixed connector is fixedly connected to one end of the connector, and the connection structure includes a connecting pipe, which is fixedly connected to the other end of the connector. The inner wall of the connecting pipe is provided with an internal thread, and a conduit is fixedly connected to the inner wall of the connector and the fixed connector.

[0016] Furthermore, the rotating structure includes a rotating bearing, which is fixedly connected to one end of the side wall of the conduit. A rotating disk is fixedly connected to the side wall of the rotating bearing, and a placement groove is provided on the side wall of the fixed connection head. A second motor is fixedly connected to the inner wall of the placement groove.

[0017] Furthermore, a connecting gear is fixedly connected to the output end of the second motor, and a connecting gear ring is fixedly connected to one end of the rotating disk. The connecting gear and the gear ring mesh with each other. A plurality of threaded holes are opened on the side wall of the rotating disk, and threaded tubes are threadedly connected to the inner wall of the threaded holes. A nozzle is fixedly connected to one end of the plurality of threaded tubes.

[0018] Furthermore, the method of using the aforementioned cleanroom central air conditioning ventilation duct cleaning equipment includes the following steps:

[0019] S1. Place the cleaning equipment into the central air conditioning ventilation duct, and use the elastic force of the first torsion spring and the second torsion spring when they are compressed to make the first support rod and the second support rod spring outward, so that the moving wheel at one end of the first support rod and the second support rod contacts the wall of the central air conditioning ventilation duct.

[0020] S2. The first motor drives the third guide wheel to rotate, which in turn drives the second guide wheel to rotate via the first transmission belt. The rotation of the second guide wheel then drives the first guide wheel connected via the second transmission belt to rotate, and the rotation of the first guide wheel drives the movable wheel on the second rotating shaft to rotate.

[0021] S3. The second motor drives the connecting gear to rotate. The rotating disk can rotate due to the rotating bearing. Since the connecting gear and the connecting gear ring mesh with each other, the rotation of the connecting gear will drive the connecting gear ring to rotate, and the rotation of the connecting gear ring will cause the rotating disk to rotate.

[0022] S4. The threaded tube will move in the threaded hole as it rotates, removing the threaded tube and nozzle from the rotating disc.

[0023] The present invention has at least the following beneficial effects:

[0024] (1) This application sets up a fixed structure and uses the elastic force of the first torsion spring and the second torsion spring when compressed to make the first support rod and the second support rod rebound outward, so that the moving wheel at one end of the first support rod and the second support rod fits tightly into the central air conditioning ventilation pipe. By setting the first support rod and the second support rod to support the fixed connector and the connector in four directions, and setting a gap between the first support rod and the second support rod at one end, the support points in the four directions are different, thereby ensuring that the fixed connector and the connector can be stably located in the center of the ventilation pipe, which is convenient for subsequent cleaning. By setting up a fixed structure, it is ensured that the cleaning equipment can enter the ventilation pipes of different shapes to carry out the operation, which is convenient for the staff to carry out the cleaning work.

[0025] (2) By setting an auxiliary moving structure, the first motor drives the third guide wheel to rotate. Since the third guide wheel and the second guide wheel are connected by a first transmission belt, the second guide wheel is driven to rotate through the first transmission belt. The rotation of the second guide wheel will drive the first guide wheel connected through the second transmission belt to rotate. The rotation of the first guide wheel will drive the moving wheel on the second rotating shaft to rotate. When the moving wheel rotates on the wall of the ventilation pipe, it will drive the cleaning equipment to move in the ventilation pipe. By setting an auxiliary moving structure, it is convenient to go deep into the ventilation pipe for cleaning work.

[0026] (3) By setting a rotating structure, when the connecting gear at the output end of the second motor rotates, the rotating disk can rotate due to the rotating bearing. Since the connecting gear and the connecting tooth ring mesh with each other, the rotation of the connecting gear will drive the connecting tooth ring to rotate. The rotation of the connecting tooth ring will cause the rotating disk to rotate. The external water pipe is connected to the connecting part through the connecting pipe and the internal thread. The water flow enters the rotating disk through the conduit and is sprayed out from the nozzle. As the rotating disk rotates, the sprayed water flow can evenly and comprehensively contact the wall of the ventilation pipe for cleaning. By setting a rotating structure, the cleaning equipment can perform fast and comprehensive cleaning.

[0027] (4) By setting up a threaded hole and a threaded pipe, the threaded hole and the threaded pipe are connected by threads. When the threaded pipe rotates, it will move in the threaded hole, which makes it easier to remove and install the threaded pipe and the nozzle from the rotating plate and to clean the clogged nozzle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the present invention.

[0030] Figure 3 This is a rear view of the structure of the present invention;

[0031] Figure 4 This is a side view of the structure of the present invention;

[0032] Figure 5 This is a cross-sectional view of the structure of the present invention;

[0033] Figure 6 In the structure of this invention Figure 4 Enlarged view of point A in the image.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Fixed connector; 2. Connector; 3. First rotating component; 4. Second rotating component; 5. Rotating shaft; 6. First support rod; 7. Second support rod; 8. First rotating shaft; 9. Second rotating shaft; 10. Moving wheel; 11. First torsion spring; 12. Second torsion spring; 13. First guide wheel; 14. Second guide wheel; 15. First motor; 16. Third guide wheel; 17. First transmission belt; 18. Second transmission belt; 19. Connecting pipe; 20. Internal thread; 21. Guide tube; 22. Rotating bearing; 23. Rotating disk; 24. Placement slot; 25. Second motor; 26. Connecting gear; 27. Connecting gear ring; 28. Threaded hole; 29. ​​Threaded pipe; 30. Nozzle. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0037] like Figure 1-6 As shown, a cleaning device for central air conditioning ventilation ducts in cleanrooms includes:

[0038] Connector 2, one end of connector 2 is provided with a connecting structure;

[0039] The fixing structure is set on the side wall of the connector 2. The fixing structure includes a first support rod 6, a second support rod 7, a first torsion spring 11 and a second torsion spring 12. The elastic support of the first torsion spring 11 and the second torsion spring 12 is used for the first support rod 6 and the second support rod 7 to continue to open and close.

[0040] An auxiliary moving structure is provided on the side wall of the fixed structure and the connecting member 2. The auxiliary moving structure includes a first motor 15, a first transmission belt 17 and a second transmission belt 18. The moving wheel 10 is rotated and moved by the power transmission of the first transmission belt 17 and the second transmission belt 18.

[0041] A rotating structure is provided at one end of the connector 2. The rotating structure includes a connecting gear 26, a connecting gear ring 27, and a rotating disk 23. The rotating disk 23 is rotated by the transmission of the connecting gear 26 and the connecting gear ring 27.

[0042] Furthermore, such as Figure 1-5As shown, the sidewall of the connector 2 is provided with a fixing structure, which includes a first rotating member 3 and a second rotating member 4. The two first rotating members 3 and the second rotating member 4 are respectively fixedly connected to the sidewall of the connector 2. The inner grooves of the two first rotating members 3 and the second rotating member 4 are respectively fixedly connected to rotating shafts 5. The sidewall of the rotating shaft 5 on the first rotating member 3 is rotatably connected to a first support rod 6. The sidewall of the rotating shaft 5 on the second rotating member 4 is rotatably connected to a second support rod 7. One end of the two first support rods 6 is rotatably connected to a first rotating shaft 8, and one end of the two second support rods 7 is rotatably connected to a first rotating shaft 8. A second rotating shaft 9 is connected, and a moving wheel 10 is fixedly connected to the side wall of the first rotating shaft 8 and the second rotating shaft 9 respectively. A first torsion spring 11 and a second torsion spring 12 are provided on the side wall of a number of rotating shafts 5. One end of the two first torsion springs 11 is fixedly connected to the inner wall of the two first support rods 6, and the other end of the two first torsion springs 11 is fixedly connected to the inner side of the two first rotating parts 3. One end of the two second torsion springs 12 is fixedly connected to the inner wall of the two second support rods 7, and the other end of the two second torsion springs 12 is fixedly connected to the inner side of the two second rotating parts 4.

[0043] The first support rod 6 and the second support rod 7 are rotated inward around the rotating shaft 5, causing them to rotate together. After the cleaning equipment is placed into the central air conditioning ventilation duct, the first torsion spring 11 and the second torsion spring 12 on the side wall of the rotating shaft 5 are compressed, causing the first support rod 6 and the second support rod 7 to spring back outward. This allows the moving wheels 10 at one end of the first support rod 6 and the second support rod 7 to fit tightly into the central air conditioning ventilation duct. The first support rod 6 and the second support rod 7 are used to support the fixed connector 1 and the connector 2 in four directions, and a gap is set between the first support rod 6 and the second support rod 7 so that the support points in the four directions are different. This ensures that the fixed connector 1 and the connector 2 can be stably located in the center of the ventilation duct, facilitating subsequent cleaning. The fixed structure ensures that the cleaning equipment can enter ventilation ducts of different shapes for operation, making it convenient for workers to carry out cleaning work.

[0044] Furthermore, the auxiliary moving structure includes a first guide wheel 13, two first guide wheels 13 are fixedly connected to one end of two second rotating shafts 9, two second rotating parts 4 are rotatably connected to the side walls of the second guide wheels 14, two first motors 15 are fixedly connected to the side walls of the connecting parts 2, three guide wheels 16 are fixedly connected to the output ends of the two first motors 15, two third guide wheels 16 and the grooves of the second guide wheels 14 are movably connected to a first transmission belt 17, two second guide wheels 14 and the grooves of the first guide wheels 13 are movably connected to a second transmission belt 18, and two grooves are provided on the side walls of the two second guide wheels 14. The first motor 15 is activated, which drives the third guide wheel 16 to rotate. Since the third guide wheel 16 is connected to the second guide wheel 14 by the first transmission belt 17, the second guide wheel 14 is driven to rotate by the first transmission belt 17. The rotation of the second guide wheel 14 will drive the first guide wheel 13 connected by the second transmission belt 18 to rotate. The rotation of the first guide wheel 13 will drive the moving wheel 10 on the second rotating shaft 9 to rotate. When the moving wheel 10 rotates on the wall of the ventilation pipe, it will drive the cleaning equipment to move in the ventilation pipe. The auxiliary moving structure is set to facilitate subsequent cleaning work in the ventilation pipe.

[0045] Furthermore, such as Figure 1 , Figure 2 , Figure 4-6 As shown, one end of the connector 2 is fixedly connected to a fixed connector head 1. The connection structure includes a connecting pipe 19, which is fixedly connected to the other end of the connector 2. The inner wall of the connecting pipe 19 is provided with an internal thread 20. The inner walls of the connector 2 and the fixed connector head 1 are fixedly connected to a conduit 21. The rotating structure includes a rotating bearing 22, which is fixedly connected to one end of the side wall of the conduit 21. A rotating disk 23 is fixedly connected to the side wall of the rotating bearing 22. A placement groove 24 is opened on the side wall of the fixed connector head 1. A second motor 25 is fixedly connected to the inner wall of the placement groove 24. A connecting gear 26 is fixedly connected to the output end of the second motor 25. A connecting toothed ring 27 is fixedly connected to one end of the rotating disk 23. The connecting gear 26 and the toothed ring 27 mesh with each other. The second motor 25 is operated, causing the connecting gear 26 at the output end of the second motor 25 to rotate. The rotating disk 23 can rotate due to the rotating bearing 22. Since the connecting gear 26 and the connecting gear ring 27 mesh with each other, the rotation of the connecting gear 26 will drive the connecting gear ring 27 to rotate, and the rotation of the connecting gear ring 27 will cause the rotating disk 23 to rotate. The external water pipe is connected to the connector through the connecting pipe 19 and the internal thread 20. The water flows into the rotating disk 23 through the conduit 21 and is sprayed out from the nozzle 30. As the rotating disk 23 rotates, the sprayed water can evenly and comprehensively contact the wall of the ventilation pipe for cleaning. The rotating structure facilitates the cleaning equipment to perform fast and comprehensive cleaning.

[0046] Furthermore, the rotating disk 23 has several threaded holes 28 on its side wall, and threaded tubes 29 are threadedly connected to the inner walls of the threaded holes 28. One end of each threaded tube 29 is fixedly connected to a nozzle 30. Due to the threaded connection between the threaded holes 28 and the threaded tubes 29, the threaded tubes 29 will move within the threaded holes 28 when they rotate, which facilitates the removal and installation of the threaded tubes 29 and nozzles 30 from the rotating disk 23, and facilitates the subsequent cleaning of clogged nozzles 30.

[0047] The working process and principle of this invention are as follows: The first support rod 6 and the second support rod 7 are rotated inward around the rotating shaft 5, causing them to rotate together. After the cleaning equipment is placed in the central air conditioning ventilation duct, the first torsion spring 11 and the second torsion spring 12 on the side wall of the rotating shaft 5 are compressed, causing the first support rod 6 and the second support rod 7 to spring back outward. The moving wheels 10 at one end of the first support rod 6 and the second support rod 7 are tightly fitted into the central air conditioning ventilation duct. By setting the first support rod 6 and the second support rod 7 to support the fixed connector 1 and the connector 2 in four directions, and by setting a gap between the first support rod 6 and the second support rod 7 at one end, the support points in the four directions are different, thereby ensuring that the fixed connector 1 and the connector 2 can be stably located in the center of the ventilation duct, facilitating subsequent cleaning. The fixed structure ensures that the cleaning equipment can enter ventilation ducts of different shapes for operation.

[0048] The first motor 15 is operated, which drives the third guide wheel 16 to rotate. Since the third guide wheel 16 is connected to the second guide wheel 14 by the first transmission belt 17, the second guide wheel 14 is driven to rotate through the first transmission belt 17. The rotation of the second guide wheel 14 will drive the first guide wheel 13 connected by the second transmission belt 18 to rotate. The rotation of the first guide wheel 13 will drive the moving wheel 10 on the second rotating shaft 9 to rotate. When the moving wheel 10 rotates on the wall of the ventilation pipe, it will drive the cleaning equipment to move in the ventilation pipe. The auxiliary moving structure is set to facilitate subsequent cleaning work in the ventilation pipe. Since the threaded hole 28 and the threaded pipe 29 are connected by threads, when the threaded pipe 29 rotates, it will move in the threaded hole 28, which facilitates the subsequent removal and installation of the threaded pipe 29 and the nozzle 30 from the rotating plate 23, as well as the subsequent cleaning of the clogged nozzle 30.

[0049] The second motor 25 is operated, causing the connecting gear 26 at the output end of the second motor 25 to rotate. The rotating disk 23 can rotate due to the rotating bearing 22. Since the connecting gear 26 and the connecting gear ring 27 mesh with each other, the rotation of the connecting gear 26 will drive the connecting gear ring 27 to rotate, and the rotation of the connecting gear ring 27 will cause the rotating disk 23 to rotate. The external water pipe is connected to the connector through the connecting pipe 19 and the internal thread 20. The water flows into the rotating disk 23 through the conduit 21 and is sprayed out from the nozzle 30. As the rotating disk 23 rotates, the sprayed water can evenly and comprehensively contact the wall of the ventilation pipe for cleaning. The rotating structure enables the cleaning equipment to perform fast and comprehensive cleaning.

[0050] Although preferred embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications and substitutions can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for central air conditioning ventilation ducts in cleanrooms, characterized in that, include: Connector (2), one end of which is provided with a connecting structure; The fixing structure is provided on the side wall of the connector (2). The fixing structure includes a first support rod (6), a second support rod (7), a first torsion spring (11), and a second torsion spring (12). The elastic support of the first torsion spring (11) and the second torsion spring (12) is used for the first support rod (6) and the second support rod (7) to continue to open and close. An auxiliary moving structure is provided on the side wall of the fixed structure and the connecting member (2). The auxiliary moving structure includes a first motor (15), a first transmission belt (17), and a second transmission belt (18). The moving wheel (10) is rotated and moved by the power transmission of the first transmission belt (17) and the second transmission belt (18). A rotating structure is provided at one end of the connector (2). The rotating structure includes a connecting gear (26), a connecting gear ring (27), and a rotating disk (23). The rotating disk (23) is rotated by the transmission of the connecting gear (26) and the connecting gear ring (27). The side wall of the connector (2) is provided with a fixing structure, which includes a first rotating part (3) and a second rotating part (4). The two first rotating parts (3) and the second rotating part (4) are respectively fixedly connected to the side wall of the connector (2). The inner grooves of the two first rotating parts (3) and the second rotating part (4) are respectively fixedly connected to a rotating shaft (5). The side wall of the rotating shaft (5) on the first rotating part (3) is rotatably connected to a first support rod (6), and the side wall of the rotating shaft (5) on the second rotating part (4) is rotatably connected to a second support rod (7). Two first support rods (6) are rotatably connected to a first rotating shaft (8) at one end, and two second support rods (7) are rotatably connected to a second rotating shaft (9) at one end. The first rotating shaft (8) and the second rotating shaft (9) are respectively fixedly connected to a moving wheel (10) on their side walls. A first torsion spring (11) and a second torsion spring (12) are provided on the side walls of a plurality of rotating shafts (5). One end of each of the two first torsion springs (11) is fixedly connected to the inner wall of the two first support rods (6), and the other end of each of the two first torsion springs (11) is fixedly connected to the inner side of the two first rotating parts (3). One end of each of the two second torsion springs (12) is fixedly connected to the inner wall of the two second support rods (7), and the other end of each of the two second torsion springs (12) is fixedly connected to the inner side of the two second rotating parts (4).

2. The cleaning equipment for central air conditioning ventilation ducts in cleanrooms according to claim 1, characterized in that: The auxiliary moving structure includes a first guide wheel (13), two first guide wheels (13) are fixedly connected to one end of two second rotating shafts (9), two second rotating parts (4) are rotatably connected to the side walls of the second guide wheel (14), two first motors (15) are fixedly connected to the side walls of the connecting part (2), and a third guide wheel (16) is fixedly connected to the output end of the two first motors (15).

3. The cleaning equipment for central air conditioning ventilation ducts in cleanrooms according to claim 2, characterized in that: The grooves of the two third guide wheels (16) and the second guide wheel (14) are movably connected to the first transmission belt (17), and the grooves of the two second guide wheels (14) and the first guide wheel (13) are movably connected to the second transmission belt (18). The sidewalls of the two second guide wheels (14) are provided with two grooves.

4. The cleaning equipment for central air conditioning ventilation ducts in cleanrooms according to claim 1, characterized in that: One end of the connector (2) is fixedly connected to a fixed connector (1). The connection structure includes a connecting pipe (19). The connecting pipe (19) is fixedly connected to the other end of the connector (2). The inner wall of the connecting pipe (19) is provided with an internal thread (20). The inner walls of the connector (2) and the fixed connector (1) are fixedly connected with a conduit (21).

5. A cleaning device for central air conditioning ventilation ducts in cleanrooms according to claim 4, characterized in that: The rotating structure includes a rotating bearing (22), which is fixedly connected to one end of the side wall of the conduit (21). A rotating disk (23) is fixedly connected to the side wall of the rotating bearing (22). A placement groove (24) is opened on the side wall of the fixed connector (1). A second motor (25) is fixedly connected to the inner wall of the placement groove (24).

6. The cleaning equipment for central air conditioning ventilation ducts in cleanrooms according to claim 5, characterized in that: The output end of the second motor (25) is fixedly connected to a connecting gear (26), and one end of the rotating disk (23) is fixedly connected to a connecting gear ring (27). The connecting gear (26) and the gear ring (27) mesh with each other. The side wall of the rotating disk (23) is provided with several threaded holes (28). The inner wall of the threaded holes (28) is threaded with threaded tubes (29). One end of several threaded tubes (29) is fixedly connected to a nozzle (30).

7. A cleaning device for central air conditioning ventilation ducts in cleanrooms according to any one of claims 1-6, characterized in that: The method of using the cleaning equipment for central air conditioning ventilation ducts in cleanrooms: S1. Place the cleaning equipment into the central air conditioning ventilation duct, and use the elastic force of the first torsion spring (11) and the second torsion spring (12) when compressed to make the first support rod (6) and the second support rod (7) spring outward, so that the moving wheel (10) at one end of the first support rod (6) and the second support rod (7) contacts the wall of the central air conditioning ventilation duct. S2. The first motor (15) drives the third guide wheel (16) to rotate, and drives the second guide wheel (14) to rotate through the first transmission belt (17). The rotation of the second guide wheel (14) then drives the first guide wheel (13) connected through the second transmission belt (18) to rotate. The rotation of the first guide wheel (13) drives the moving wheel (10) on the second rotating shaft (9) to rotate. S3. The second motor (25) drives the connecting gear (26) to rotate. The rotating disk (23) can rotate due to the rotating bearing (22). Since the connecting gear (26) and the connecting gear ring (27) mesh with each other, the rotation of the connecting gear (26) will drive the connecting gear ring (27) to rotate. The rotation of the connecting gear ring (27) will cause the rotating disk (23) to rotate. S4. The threaded tube (29) will move in the threaded hole (28) when it rotates, and the threaded tube (29) and nozzle (30) will be removed from the rotating disk (23).

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