A cleaning device for air conditioning ventilation ducts

Abstract

This invention discloses an air conditioning ventilation duct cleaning device, belonging to the field of cleaning devices. It includes a cleaning box, comprising a base and a hollow housing. A bidirectional cylinder is fixedly installed inside the box. A positioning plate is fixedly connected to the output end of each bidirectional cylinder. A sleeve is rotatably connected to the positioning plate, and a disc is fixedly connected to the sleeve. The disc has several arc-shaped holes at equal angles along its circumference, extending from near the center of the disc towards the opposite side. A horizontal bar is slidably connected to each arc-shaped hole. A vertical bar is vertically fixedly connected to each horizontal bar. A soft brush plate is fixedly connected to the end of the vertical bar opposite to the horizontal bar. The positioning plate has several limiting grooves adapted to the vertical bar. The cleaning box has two sets of traction components to control the rotation of the disc. A locking component for positioning the vertical bar is provided at the output end of each bidirectional cylinder. This application can simultaneously clean the inner wall of the air conditioning ventilation duct from both sides of the vent, improving the cleaning efficiency of the air conditioning duct.

Description

Technical Field

[0001] This invention relates to the field of cleaning devices, and more particularly to a cleaning device for air conditioning ventilation ducts. Background Technology

[0002] Air conditioning is an indispensable piece of equipment in daily life and production. It can regulate the temperature and humidity of the air in a building environment. It mainly includes air conditioning piping systems, chillers, water pumps, and fans. Central air conditioning is often used in some commercial buildings and industrial parks. Central air conditioning can centrally process air to meet the relevant requirements for environmental parameters such as temperature and humidity.

[0003] The relevant technology can be found in Chinese Patent No. CN208894780U, which discloses an air conditioning ventilation duct cleaning device, including a cleaning mechanism. A cleaning box is fixedly installed in the middle of the cleaning mechanism. Storage slots are symmetrically opened on both sides of the cleaning box. Electric telescopic rods are evenly and symmetrically fixedly installed at the four corners inside the storage slots. Two rows of steering wheels are evenly and symmetrically rotatably installed at the front end of the cleaning box. A dust suction port is opened on one side of the front end of the cleaning box, and an air blowing port is opened on the other side of the dust suction port. The air blowing port is located inside the cleaning box. A retraction spring is evenly and symmetrically fixedly installed at the bottom of the front end of the cleaning box. A rubber scraper is fixedly connected to the lower end of the retraction spring. Universal wheels are evenly and symmetrically fixedly installed at the four corners of the bottom end of the cleaning box. A first cleaning box and a second cleaning box are fixedly connected to the end of the electric telescopic rod opposite to the cleaning box.

[0004] Regarding the aforementioned technologies, when using the air conditioning duct cleaning device, the operator manually inserts the entire device into the ventilation duct by holding the controller. The cleaning device also needs to be manually controlled to move inside the air conditioning duct, which is laborious and can only clean one side at a time, resulting in low cleaning efficiency for the air conditioning duct. Summary of the Invention

[0005] To improve the cleaning efficiency of air conditioning ducts, this application provides an air conditioning ventilation duct cleaning device.

[0006] This application provides a cleaning device for air conditioning ventilation ducts, which adopts the following technical solution:

[0007] An air conditioning ventilation duct cleaning device includes a cleaning box, which comprises a base and a hollow box body. A bidirectional cylinder is fixedly installed inside the box body. A positioning plate is fixedly connected to the output end of each bidirectional cylinder. A sleeve is rotatably connected to the positioning plate. A disc is fixedly connected to the sleeve. The disc has several arc-shaped holes at equal angles along its circumference. The arc-shaped holes are opened from near the center of the disc to away from the center of the disc. A horizontal bar is slidably connected to all the arc-shaped holes. A vertical bar is fixedly connected to the horizontal bar. A soft brush plate is fixedly connected to the end of the vertical bar away from the horizontal bar. The positioning plate has several limiting grooves adapted to the vertical bar. The cleaning box is provided with two sets of traction components to control the rotation of the disc. A locking component for positioning the vertical bar is provided at the output end of each bidirectional cylinder.

[0008] By adopting the above technical solution, the cleaning box is placed into the ventilation duct from the vent. The two bidirectional cylinders are activated, and their output ends extend and gradually extend along the length of the air conditioning ventilation duct. The output ends of the bidirectional cylinders drive the positioning plate to move. Under the action of the traction component, the sleeve and the disc gradually rotate. As the disc rotates, the horizontal bar moves from near the center of the disc to away from the center in the arc-shaped hole. Simultaneously, the vertical bar moves along the limiting groove from near the center of the disc to away from the center until the four soft brush plates contact the four inner walls of the air conditioning ventilation duct. The locking component positions the vertical bar. Then, the output ends of the bidirectional cylinders retract, and the soft brush plates scrape away dust and impurities from the inner walls of the air conditioning ventilation duct, pushing the scraped dust and impurities closer to the base. This simultaneously cleans the inner walls of the air conditioning ventilation duct from both sides of the vent, improving the cleaning efficiency of the air conditioning duct.

[0009] Optionally, the traction assembly includes a connecting rod, a pull rope, a connecting plate, and a guide wheel. The connecting rod is connected to the housing and fixedly connected to the pull rope. The connecting plate is fixedly connected to the output end of the corresponding bidirectional cylinder. The guide wheel is rotatably connected to the connecting plate. The end of the pull rope away from the connecting rod passes around the guide wheel and wraps around the corresponding sleeve.

[0010] By adopting the above technical solution, as the output end of the bidirectional cylinder gradually extends, the pull rope on the sleeve gradually unwinds, and the pull rope pulls the sleeve to rotate around the output end of the bidirectional cylinder, making it more convenient to make the disc rotate.

[0011] Optionally, the connecting rod is rotatably connected to the housing. Two square slots are opened on one side of the housing. One end of the connecting rod passes through the housing and is located in the corresponding square slot. The housing is provided with a square block that is slidably connected to the square slot. The square block is provided with a through slot that matches the connecting rod. A positioning block is fixedly connected to the square block. The connecting rod is provided with a positioning slot that matches the positioning block.

[0012] By adopting the above technical solution, the positioning block positions the connecting rod, and the square groove limits the square block, which helps to ensure that the connecting rod will not rotate when it extends at the output end of the bidirectional cylinder; when the square block is removed from the square groove, the connecting rod can be rotated to wind up the pull rope for easy use next time.

[0013] Optionally, the sleeve has a cable groove along its length that is compatible with the pull rope.

[0014] By adopting the above technical solution, the pull rope is wound along the cable groove, which facilitates the limiting of the pull rope, reduces the probability of the pull rope slipping, and helps to ensure the normal rotation of the disc.

[0015] Optionally, the locking assembly includes a ratchet and a pawl, with the ratchet engaging with a corresponding pawl, the ratchet being fixedly connected to the sleeve, and the pawl being rotatably connected to the output end of the bidirectional cylinder.

[0016] By adopting the above technical solution, when the output end of the bidirectional cylinder gradually extends, the ratchet rotates with the sleeve, and the pawl rotates intermittently; when the output end of the bidirectional cylinder gradually retracts, the pawl locks the ratchet, preventing the disc from rotating and ensuring that the soft brush plate is always in contact with the inner wall of the air conditioning ventilation duct.

[0017] Optionally, the base has through holes at both ends along its length.

[0018] By adopting the above technical solution, a through hole is provided to facilitate the repositioning of the soft brush plate, thereby allowing the cleaning box to be removed from the air conditioning ventilation duct.

[0019] Optionally, the base is hinged to support blocks at both ends along its length, and a retaining edge is fixed to the base near the support blocks.

[0020] By adopting the above technical solution, the cleaning box is placed into the air conditioning ventilation duct through the ventilation port, the support block rotates around the connection point with the base, the retaining edge limits the support block, and the support block supports the entire cleaning box, which helps to improve the convenience of cleaning the air conditioning ventilation duct.

[0021] Optionally, sponge pads are fixedly connected to both ends of the soft brush plate along its length.

[0022] By adopting the above technical solution, when the soft brush plate extends out of the box, the sponge pad extends. When the soft brush plate comes into contact with the inner wall of the air conditioning ventilation duct, the sponge pad helps to increase the cleaning area for dust and impurities, thereby improving the cleaning effect on the air conditioning ventilation duct.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Place the cleaning box into the ventilation duct through the vent. Activate the two-way cylinders. The output ends of the two-way cylinders extend and gradually extend along the length of the air conditioning ventilation duct. The output ends of the two-way cylinders drive the positioning plate to move. Under the action of the traction component, the sleeve and the disc gradually rotate. When the disc rotates, the horizontal bar moves from near the center of the disc to away from the center of the disc through the arc-shaped hole. At the same time, the vertical bar moves from near the center of the disc to away from the center of the disc along the limiting groove until the four soft brush plates abut against the four inner walls of the air conditioning ventilation duct. The locking component positions the vertical bar. Then, the output ends of the two-way cylinders retract, and the soft brush plates scrape away the dust and impurities on the inner wall of the air conditioning ventilation duct, pushing the scraped dust and impurities closer to the base. This completes the cleaning of the inner wall of the air conditioning ventilation duct from both sides of the vent, improving the cleaning efficiency of the air conditioning duct.

[0025] 2. As the output end of the bidirectional cylinder gradually extends, the pull rope on the sleeve gradually unwinds, and the pull rope pulls the sleeve to rotate around the output end of the bidirectional cylinder, making it easier to make the disc rotate.

[0026] 3. As the output end of the bidirectional cylinder gradually extends, the ratchet rotates with the sleeve, and the pawl rotates intermittently; as the output end of the bidirectional cylinder gradually retracts, the pawl locks the ratchet, preventing the disc from rotating and ensuring that the soft brush plate is always in contact with the inner wall of the air conditioning ventilation duct. Attached Figure Description

[0027] Figure 1 This is a schematic diagram showing the location of air conditioning ventilation ducts and cleaning devices.

[0028] Figure 2 This is a schematic diagram of the overall structure of an air conditioning ventilation duct cleaning device according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the internal structure of the box.

[0030] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0031] Figure 5 This is an exploded view of the disk and the positioning plate.

[0032] Explanation of reference numerals in the attached drawings: 100, ventilation duct; 1, cleaning box; 2, base; 3, box body; 4, two-way cylinder; 41, positioning plate; 42, sleeve; 43, disc; 431, arc-shaped hole; 5, horizontal bar; 51, vertical bar; 52, soft brush plate; 411, limiting groove; 6, traction assembly; 61, connecting rod; 62, pull rope; 63, connecting plate; 64, guide wheel; 7, locking assembly; 31, square groove; 32, square block; 321, through groove; 322, positioning block; 311, positioning groove; 421, wiring groove; 71, ratchet; 72, pawl; 21, through hole; 22, support block; 23, retaining edge; 521, sponge pad; 8, suction port; 81, dust collection box. Detailed Implementation

[0033] The present application will be further described in detail below with reference to all the accompanying drawings.

[0034] This application discloses an air conditioning ventilation duct cleaning device. Example

[0035] Reference Figure 1 and Figure 2 An air conditioning ventilation duct cleaning device includes a cleaning box 1, which comprises a base 2 and a hollow box body 3, with the base 2 fixed to the box body 3. A bidirectional cylinder 4 is fixedly installed inside the box body 3. Both ends of the box body 3 along its length are open, and the output end of the bidirectional cylinder 4 corresponds to the two openings of the box body 3 respectively. Initially, the output end of the bidirectional cylinder 4 is in a retracted state.

[0036] Reference Figure 3 and Figure 4 Each output end of the bidirectional cylinder 4 is fixedly connected to a positioning plate 41. A sleeve 42 is rotatably connected to the positioning plate 41, and a disc 43 is fixedly connected to the sleeve 42. The sleeve 42 is fitted onto the corresponding output end of the bidirectional cylinder 4. The disc 43 has several arc-shaped holes 431 at equal angles along its circumference. The arc-shaped holes 431 extend from near the center of the disc 43 towards the opposite side. A crossbar 5 is slidably connected within each arc-shaped hole 431. A vertical rod 51 is vertically fixedly connected to the crossbar 5, and a soft brush plate 52 is fixedly connected to the end of the vertical rod 51 opposite to the crossbar 5. When the output end of the bidirectional cylinder 4 is in the retracted state, both the positioning plate 41 and the soft brush plate 52 are located inside the housing 3, and the crossbar 5 is located at the end of the arc-shaped hole 431 near the center of the disc 43.

[0037] Reference Figure 1 and Figure 2When using the air conditioning ventilation duct cleaning device, the operator vertically inserts the cleaning box 1 into the ventilation duct 100 through the vent. After the operator places the cleaning box 1 into the air conditioning ventilation duct 100 through the vent, support blocks 22 are hinged to both ends of the base 2 along its length. The support blocks 22 are rotated around their connection points with the base 2. A retaining edge 23 is fixed to the base 2 near the support blocks 22, limiting the opening and closing angle of the support blocks 22. Thus, the support blocks 22 provide overall support for the cleaning box 1 within the air conditioning ventilation duct 100, eliminating the need for manual handling of the cleaning box 1. The operator then activates the two bidirectional cylinders 4, causing the output ends of the two bidirectional cylinders 4 to extend and gradually extend along the length of the air conditioning ventilation duct 100.

[0038] Reference Figure 2 and Figure 4 The positioning plate 41 has four limiting grooves 411 that are adapted to the vertical rod 51. The cleaning box 1 is equipped with two sets of traction components 6 for controlling the rotation of the control disc 43. The traction component 6 includes a connecting rod 61, a pull rope 62, a connecting plate 63 and a guide wheel 64. The connecting rod 61 is rotatably connected to the box body 3. Two square grooves 31 are opened on one side of the box body 3. One end of the connecting rod 61 passes through the box body 3 and is located in the corresponding square groove 31.

[0039] Reference Figure 2 and Figure 4 The housing 3 is provided with a square block 32 that is slidably connected to a square groove 31. The square block 32 has a through groove 321 that matches the connecting rod 61. A positioning block 322 is fixedly connected to the square block 32. The connecting rod 61 has a positioning groove 311 that matches the positioning block 322. The positioning groove 311 is connected to the square groove 31. Initially, the positioning block 322 on the square block 32 is located in the positioning groove 311 of the connecting rod 61. The positioning block 322 positions the connecting rod 61, and the square groove 31 limits the square block 32. The connecting rod 61 is fixedly connected to the pull rope 62 to ensure that the connecting rod 61 will not rotate when the output end of the bidirectional cylinder 4 is extended.

[0040] Reference Figure 4 and Figure 5 In the initial position, link 61 and housing 3 (refer to...) Figure 2 The relative positions are fixed, and the pull rope 62 located on the connecting rod 61 is fixed relative to the connecting rod 61; the connecting plate 63 is fixedly connected to the output end of the corresponding bidirectional cylinder 4, the guide wheel 64 is rotatably connected to the connecting plate 63, and the end of the pull rope 62 away from the connecting rod 61 passes around the guide wheel 64 and is wound around the corresponding sleeve 42, and the pull rope 62 is fixedly connected to the sleeve 42.

[0041] Reference Figure 4 and Figure 5As the output end of the bidirectional cylinder 4 gradually moves the positioning plate 41 away from the housing 3, the pull rope 62 on the sleeve 42 gradually unwinds as the output end of the bidirectional cylinder 4 gradually extends, pulling the sleeve 42 to rotate around the output end of the bidirectional cylinder 4, thus causing the disc 43 to rotate. The sleeve 42 has a wiring groove 421 along its length that is adapted to the pull rope 62. One end of the pull rope 62 on the sleeve 42 is wound along the wiring groove 421. The wiring groove 421 limits the pull rope 62, increases the friction between the pull rope 62 and the sleeve 42, and reduces the probability of the pull rope 62 slipping.

[0042] Reference Figure 4 and Figure 5 As the positioning plate 41 moves, the sleeve 42 and the disc 43 gradually rotate. When the disc 43 rotates, the arc-shaped hole 431 limits the horizontal bar 5, and the limiting groove 411 of the positioning plate 41 limits the vertical bar 51. This causes the horizontal bar 5 to move from near the center of the disc 43 to away from the center of the disc 43 within the arc-shaped hole 431. Simultaneously, the vertical bar 51 moves along the limiting groove 411 from near the center of the disc 43 to away from the center of the disc 43, until the soft brush plates 52 on the four vertical bars 51 respectively contact the air conditioning ventilation duct 100 (refer to...). Figure 1 The four inner walls of the ) are in contact with each other. The four soft brush plates 52 respectively contact the air conditioning ventilation duct 100 (refer to Figure 1 When the four inner walls of the cylinder 4 come into contact with each other, the output end of the two-way cylinder 4 extends to its limit position.

[0043] Reference Figure 4 and Figure 5 Each output end of the bidirectional cylinder 4 is equipped with a locking assembly 7 for positioning the vertical rod 51. The locking assembly 7 includes a ratchet 71 and a pawl 72. The ratchet 71 is fixedly connected to the sleeve 42. When the output end of the bidirectional cylinder 4 gradually extends, the ratchet 71 rotates with the sleeve 42. The pawl 72 is rotatably connected to the output end of the bidirectional cylinder 4, and the pawl 72, which abuts against the ratchet 71, rotates intermittently. When the output end of the bidirectional cylinder 4 gradually retracts, the pawl 72 locks the ratchet 71, preventing the sleeve 42 and the disc 43 from rotating, thereby preventing the vertical rod 51 from moving and ensuring that the soft brush plate 52 is always in contact with the air conditioning ventilation duct 100 (refer to...). Figure 1 The inner wall is in contact.

[0044] Reference Figure 2 and Figure 4 The operator then retracts the output end of the bidirectional cylinder 4, thereby causing the soft brush plate 52 to move the air conditioning ventilation duct 100 (refer to...). Figure 1The dust and impurities on the inner wall are scraped off, and the scraped impurities are pushed closer to the housing 3; both ends of the soft brush plate 52 along its length are fixedly connected to sponge pads 521. When the soft brush plate 52 is inside the housing 3, the sponge pads 521 are in a compressed state. When the output end of the bidirectional cylinder 4 drives the soft brush plate 52 to extend out of the housing 3, the sponge pads 521 extend. When the soft brush plate 52 is in contact with the air conditioning ventilation duct 100 (refer to...), the sponge pads 521 extend. Figure 1 When the inner wall comes into contact, the sponge pad 521 also contacts the corresponding air conditioning ventilation duct 100 (see reference). Figure 1 The inner wall contacts the surface, increasing the cleaning area for dust and impurities, and improving the cleaning efficiency of the air conditioning ventilation duct (refer to 100). Figure 1 The cleaning effect.

[0045] Reference Figure 2 Dust suction ports 8 are provided at both ends of the base 2 along the length direction. When the output end of the bidirectional cylinder 4 retracts, it drives the soft brush plate 52 to move closer to the end of the box 3. The dust and impurities attached to the inner wall of the air conditioning ventilation duct 100 are scraped off by the soft brush plate 52. Under the pushing action of the soft brush plate 52, the dust and impurities are pushed to the vicinity of the dust suction port 8.

[0046] Reference Figure 1 and Figure 2 The lower end of the base 2 is fixedly connected to a dust collection box 81 corresponding to the suction port 8. The dust collection box 81 is connected to a suction component. The suction component works on the same principle as a vacuum cleaner. It uses a motor to drive the fan impeller to rotate, creating a negative air pressure in the base 2 to suck up dust and other debris brushed off by the soft brush plate 52. While expelling the sucked-in air from the fan, the dust and other debris are filtered through the filter and collected into the dust collection box 81, making it more convenient to clean and collect dust and impurities.

[0047] Reference Figure 1 and Figure 4 Based on the shape and size of the air conditioning ventilation duct 100, the number and angle of the arc-shaped holes 431, as well as the length of the vertical rod 51, can be adjusted to accommodate ventilation ducts 100 of different shapes and sizes. The cleaning device can be moved and cleaned within the air conditioning ventilation duct 100 without manual control, and the inner wall of the air conditioning ventilation duct 100 can be cleaned from both sides of the ventilation opening, improving the cleaning efficiency of the air conditioning duct and making cleaning the air conditioning ventilation duct 100 more convenient.

[0048] Reference Figure 1 and Figure 4The base 2 has through holes 21 at both ends along its length. The suction port 8 is not connected to the through holes 21. When the output end of the bidirectional cylinder 4 retracts, it moves the soft brush plate 52 to a position close to the box 3. The operator puts his hand through the through hole 21 and moves the pawl 72 to separate the pawl 72 from the ratchet 71. Then, the sleeve 42 is rotated to reset the vertical rod 51 and the soft brush plate 52 and put them back into the box 3.

[0049] Reference Figure 1 and Figure 2 Next, lift the cleaning box 1 upwards, rotate the support block 22 to reset it, and vertically remove the cleaning box 1 from the air conditioning ventilation duct 100. After removing the cleaning box 1 from the air conditioning ventilation duct 100, remove the square block 32 from the square groove 31. At this time, the positioning block 322 separates from the positioning groove 311 of the connecting rod 61. Then rotate the connecting rod 61 to pull the rope 62 (refer to...). Figure 4 Roll it up for easy use next time.

[0050] The implementation principle of the air conditioning ventilation duct cleaning device in this application embodiment is as follows: When using the air conditioning ventilation duct 100 cleaning device, the operator vertically inserts the cleaning box 1 into the ventilation duct 100 from the ventilation opening. The operator then activates the two-way cylinders 4. The output ends of the two-way cylinders 4 extend and gradually extend along the length of the air conditioning ventilation duct 100. The output ends of the two-way cylinders 4 gradually drive the positioning plate 41 to move away from the box body 3. When the positioning plate 41 moves, under the action of the traction component 6, the sleeve 42 and the disc 43 gradually rotate. When the disc 43 rotates, the arc-shaped hole 431 limits the horizontal bar 5, and the limiting groove 411 of the positioning plate 41 limits the vertical bar 51, so that the horizontal bar 51... As the arc-shaped hole 431 moves from near the center of the disc 43 to away from the center of the disc 43, the vertical rod 51 moves along the limiting groove 411 from near the center of the disc 43 to away from the center of the disc 43 until the soft brush plates 52 on the four vertical rods 51 respectively contact the four inner walls of the air conditioning ventilation duct 100. At this time, the output end of the bidirectional cylinder 4 extends to the limit position, and the locking assembly 7 positions the vertical rod 51. Then, the output end of the bidirectional cylinder 4 is retracted, and the soft brush plates 52 scrape off the dust and impurities on the inner wall of the air conditioning ventilation duct 100 and push the scraped impurities to the vicinity of the housing 3. At the same time, the inner wall of the air conditioning ventilation duct 100 is cleaned from both sides of the ventilation opening, which improves the cleaning efficiency of the air conditioning duct.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cleaning device for air conditioning ventilation ducts, comprising a cleaning box (1), characterized in that: The cleaning box (1) includes a base (2) and a hollow box body (3). A two-way cylinder (4) is fixedly installed inside the box body (3). The output end of the two-way cylinder (4) is fixedly connected to a positioning plate (41). The positioning plate (41) is rotatably connected to a sleeve (42). The sleeve (42) is fixedly connected to a disc (43). The disc (43) has several arc-shaped holes (431) at equal angles along its circumference. The arc-shaped holes (431) are opened from near the center of the disc (43) to away from the center of the disc (43). A horizontal bar (5) is slidably connected inside an arc-shaped hole (431). A vertical bar (51) is vertically fixedly connected to the horizontal bar (5). A soft brush plate (52) is fixedly connected to the end of the vertical bar (51) away from the horizontal bar (5). The positioning plate (41) has several limiting grooves (411) that are adapted to the vertical bar (51). The cleaning box (1) is equipped with two sets of traction components (6) for controlling the rotation of the control disc (43). The output end of the two-way cylinder (4) is equipped with a locking component (7) for positioning the vertical bar (51). The lead assembly (6) includes a connecting rod (61), a pull rope (62), a connecting plate (63), and a guide wheel (64). The connecting rod (61) is connected to the housing (3) and fixedly connected to the pull rope (62). The connecting plate (63) is fixedly connected to the output end of the corresponding bidirectional cylinder (4). The guide wheel (64) is rotatably connected to the connecting plate (63). The end of the pull rope (62) away from the connecting rod (61) passes around the guide wheel (64) and is wound around the corresponding sleeve (42). The connecting rod (61) is connected to the housing (3). Rotary connection, two square slots (31) are opened on one side of the box (3), one end of the connecting rod (61) passes through the box (3) and is located in the corresponding square slot (31), the box (3) is provided with a square block (32) that is slidably connected to the square slot (31), the square block (32) is provided with a through slot (321) that is adapted to the connecting rod (61), the square block (32) is fixedly connected with a positioning block (322), and the connecting rod (61) is provided with a positioning slot (311) that is adapted to the positioning block (322).

2. The air conditioning ventilation duct cleaning device according to claim 1, characterized in that: The sleeve (42) has a cable groove (421) along its length that is compatible with the pull rope (62).

3. The air conditioning ventilation duct cleaning device according to claim 1, characterized in that: The locking assembly (7) includes a ratchet (71) and a pawl (72). The ratchet (71) cooperates with the corresponding pawl (72). The ratchet (71) is fixedly connected to the sleeve (42), and the pawl (72) is rotatably connected to the output end of the two-way cylinder (4).

4. The air conditioning ventilation duct cleaning device according to claim 1, characterized in that: The base (2) has through holes (21) at both ends along its length.

5. The air conditioning ventilation duct cleaning device according to claim 1, characterized in that: The base (2) has support blocks (22) hinged at both ends along its length, and a retaining edge (23) is fixed on the base (2) near the support blocks (22).

6. The air conditioning ventilation duct cleaning device according to claim 1, characterized in that: The soft brush plate (52) has sponge pads (521) fixedly connected to both ends along its length.

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