Air duct device and clothes drying equipment

Abstract

The invention relates to the technical field of household appliances, and particularly discloses an air duct device and clothes drying equipment. According to the air duct device provided by the invention, the filter screen is arranged at the first air inlet, air enters the air duct pipe through the filter screen, thread scraps are retained on the filter screen, the scrap removing driver drives the cleaning brush to move in the circumferential direction of the air duct pipe, the cleaning brush can scrape the thread scraps on the filter screen, and the thread scraps on the air duct pipe can be removed along with the movement of the cleaning brush around the circumferential direction of the air duct pipe. When the air duct device is actually installed, the first air inlet is formed upwards, the thread scraps move from top to bottom along with the cleaning brush, and when the thread scraps move to the position below the air duct pipe, the thread scraps fall by means of the gravity of the thread scraps, and therefore cleaning of the thread scraps is achieved. And the thread scraps scraped off by the cleaning brush are finally separated from the filter screen and the air duct pipe and cannot be accumulated at the edge of the filter screen, so that the aim of effectively removing the thread scraps on the filter screen is fulfilled.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an air duct device and a clothes drying device. Background Art

[0002] A clothes dryer is an appliance that quickly evaporates and dries washed clothes. Currently, warm air is the most common drying method. This system uses heated air to evaporate and expel moisture from the clothes, drying them completely. However, the exhaust process often carries lint from the clothes with the wet air produced during drying. Directly discharging this lint-laden air into the environment would pollute it. Therefore, the wet air is filtered before being discharged.

[0003] In the prior art, a filter is typically installed to filter air, preventing lint from being discharged into the external environment along with the moist air. However, over long periods of use, lint can accumulate on the filter, affecting airflow. Furthermore, the accumulated lint can easily breed bacteria. To address this issue, a cleaning device is installed at the filter. The cleaning device operates along the length or width of the filter to scrape lint from the filter. A frame is typically provided around the circumferential edge of the filter to support and secure the filter. Although scraped, lint can accumulate at the edge of the filter. Over long periods of use, a large amount of lint can still accumulate, affecting airflow, without effectively removing the lint from the filter. Summary of the Invention

[0004] The object of the present invention is to provide an air duct device and a clothes drying device, which effectively solve the problem of lint accumulation on a filter net.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In one aspect, an air duct device is provided, comprising:

[0007] An air duct, one end of which is closed, a side wall of which is provided with a first air inlet, and a filter screen is provided at the first air inlet;

[0008] The chip removal assembly includes a chip removal driver and a cleaning brush. The chip removal driver is connected to the cleaning brush. The length direction of the cleaning brush extends along the axial direction of the air duct and can contact the filter. The chip removal driver is used to drive the cleaning brush to move circumferentially along the air duct.

[0009] As an optional technical solution for the above-mentioned air duct device, the chip removal driver is arranged at the end of one end of the air duct tube, and the chip removal assembly also includes a bracket, the chip removal driver is driven and connected to the bracket, and one end of the cleaning brush is connected to the bracket.

[0010] As an optional technical solution of the above-mentioned air duct device, the outer side wall of the air duct tube is provided with a guide assembly along the circumferential direction, and the cleaning brush is slidably connected to the guide assembly.

[0011] As an optional technical solution for the above-mentioned air duct device, the guide assembly includes a guide plate arranged circumferentially along the outer wall of the air duct tube, the guide plate is provided with a guide hole along the circumference, and one end of the cleaning brush passes through the guide hole and is connected to the bracket.

[0012] As an optional technical solution for the above-mentioned air duct device, a protective cover is provided on the outer side of the air duct tube, and a accommodating cavity is formed between the protective cover and the air duct tube. The filter screen and the cleaning brush are both placed in the accommodating cavity. A second air inlet is provided at a position where the protective cover is opposite to the filter screen, and a chip removal port is provided on the protective cover at a position opposite to the second air inlet.

[0013] As an optional technical solution for the above-mentioned air duct device, the shield is a cylindrical structure, the shield is mounted on the outside of the air duct pipe and the end is connected to the outer wall of the air duct pipe, the shield and the end of the air duct pipe are spaced apart, the chip removal drive is fixed on the outer wall of the shield, and the bracket is arranged between the shield and the end of the air duct pipe.

[0014] As an optional technical solution for the above-mentioned air duct device, there are multiple cleaning brushes, and the multiple cleaning brushes are evenly spaced along the circumference of the air duct tube. The multiple cleaning brushes are connected to the chip removal driver, and the chip removal driver drives the multiple cleaning brushes to move along the circumference of the air duct tube.

[0015] As an optional technical solution of the above-mentioned air duct device, the cross section of the air duct pipe is circular.

[0016] On the other hand, a clothes drying device is provided, comprising a drum and an air duct device described above, wherein the first air inlet is connected to the exhaust port of the drum, and a first exhaust component is provided at the exhaust port of the drum, and the first exhaust component is used to make the air in the drum flow to the air duct pipe.

[0017] As an optional technical solution for the above-mentioned clothes drying device, the clothes drying device also includes an exhaust duct and a second exhaust component, one end of the exhaust duct is connected to the other end of the air duct pipe, and the other end of the exhaust duct is connected to the external environment, and the second exhaust component is used to allow the air in the air duct pipe to pass through the exhaust duct and flow out of the exhaust duct.

[0018] Beneficial effects of the present invention:

[0019] The lint scraps scraped off by the cleaning brush will eventually separate from the filter screen and the air duct and will not accumulate at the edge of the filter screen, thereby achieving the purpose of effectively removing lint scraps from the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the overall structure of the air duct device provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the partial structure of the air duct device provided by an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of an air duct device provided by an embodiment of the present invention;

[0023] Figure 4 1 is a schematic structural diagram of a chip removal assembly provided by an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the distribution of four cleaning brushes provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Air duct; 2. Filter; 3. Chip removal assembly; 4. Guide assembly; 5. Shield;

[0027] 11. First air inlet;

[0028] 31. Chip removal driver; 32. Cleaning brush; 321. First cleaning brush; 322. Second cleaning brush; 323. Third cleaning brush; 324. Fourth cleaning brush; 33. Bracket; 34. Fixing block; 35. Connecting rod;

[0029] 41. Guide plate; 411. First guide plate; 412. Second guide plate; 413. Fixing plate; 42. Guide hole;

[0030] 51. Second air inlet; 52. Chip discharge port. DETAILED DESCRIPTION

[0031] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In view of the problem that in the prior art, when the cleaning device arranged at the filter scrapes away the lint on the filter, although the lint is scraped away, it will accumulate on the edge of the filter. After long-term use, a large amount of lint will still accumulate and affect the air flow of the filter, and the lint on the filter is not effectively removed. This embodiment provides an air duct device and a clothes drying device to solve the above technical problems.

[0035] like Figure 1 and Figure 2 As shown, the air duct assembly provided in this embodiment includes an air duct tube 1 and a chip removal assembly 3. One end of the air duct tube 1 is closed, and a first air inlet 11 is provided on the side wall of the air duct tube 1. A filter 2 is provided at the first air inlet 11. The chip removal assembly 3 includes a chip removal driver 31 and a cleaning brush 32. The chip removal driver 31 is drivingly connected to the cleaning brush 32. The length direction of the cleaning brush 32 extends along the axis of the air duct tube 1 and can contact the filter 2. The chip removal driver 31 is used to drive the cleaning brush 32 to move along the circumference of the air duct tube 1.

[0036] The air duct device provided in this embodiment has one end of the air duct pipe 1 closed, and a first air inlet 11 is provided on the side wall of the air duct pipe 1. The air entering the air duct pipe 1 through the first air inlet 11 can be discharged through the other end of the air duct pipe 1. A filter 2 is provided at the first air inlet 11. Air enters the air duct pipe 1 through the filter 2, and lint is retained on the filter 2. The lint removal driver 31 drives the cleaning brush 32 to move along the circumference of the air duct pipe 1. The cleaning brush 32 can scrape off the lint on the filter 2, and as the cleaning brush 32 moves around the air duct pipe, the lint on the filter 2 is removed. 1 moves circumferentially, and the scraps scraped off will move with the cleaning brush 32 and away from the filter 2. When the air duct device is actually installed, the first air inlet 11 is set upward, so the scraps move from top to bottom with the cleaning brush 32, and when it moves to the bottom of the air duct pipe 1, the scraps fall by their own gravity, thereby achieving the cleaning of the scraps, and the scraps scraped off by the cleaning brush 32 will eventually separate from the filter 2 and the air duct pipe 1, and will not accumulate at the edge of the filter 2, thereby achieving the purpose of effectively removing the scraps on the filter 2.

[0037] Optionally, the first air inlet 11 is provided near the enclosed end of the air duct 1, with the other end of the air duct 1 being used for exhaust. The air duct device provided in this embodiment is applied to a clothes drying apparatus, which includes a drum. The air duct 1 is connected to the drum's exhaust port. Air exhausted from the drum enters the air duct 1 through the exhaust port and the first air inlet 11, and is then exhausted from the other end of the air duct 1. The first air inlet 11 is provided near the enclosed end of the air duct 1 to reduce the velocity at which air is exhausted from the air duct 1, thereby reducing impact on components connected to the air duct 1.

[0038] The cross-section of the air duct tube 1 is circular, and the chip removal driver 31 can drive the cleaning brush 32 to move 360° circumferentially around the outer wall of the air duct tube 1, so that the lint can be scraped off starting from one end of the filter 2. The lint on the filter 2 is scraped from one end to the other end, and as the cleaning brush 32 moves, the lint on the filter 2 is completely scraped off. The cleaning brush 32 rotates around the outer wall of the air duct tube 1 once each time to clean the filter 2.

[0039] The filter screen 2 can be made of metal and is corrosion-resistant, which improves the strength and service life of the filter screen 2. The cleaning brush 32 can exert a certain force on the filter screen 2 to improve the cleanliness of the filter screen 2.

[0040] In some embodiments, a chip removal driver 31 is disposed at one end of the air duct tube 1. The chip removal assembly 3 further includes a bracket 33. The chip removal driver 31 is drivingly connected to the bracket 33, and one end of the cleaning brush 32 is connected to the bracket 33. The chip removal driver 31 is disposed at the end of the air duct tube 1 and transmits driving force to the cleaning brush 32 via the bracket 33. This fully utilizes the space at the end of the air duct tube 1 without affecting the arrangement of the cleaning brush 32, thereby improving the structural compactness of the air duct device.

[0041] Optionally, the chip removal drive 31 is a chip removal drive motor, the output shaft of the chip removal drive motor is connected to the bracket 33, the chip removal drive motor drives the bracket 33 to rotate, and then drives the cleaning brush 32 to rotate circumferentially around the air duct tube 1. The structure is simple and the operation stability is good.

[0042] In some other embodiments, the chip removal drive includes a chip removal drive motor and a transmission member. The chip removal drive motor transmits a driving force to the bracket 33 via the transmission member, causing the bracket 33 to rotate, thereby causing the cleaning brush 32 to move around the circumference of the air duct 1. The transmission member can be a gear transmission assembly, a rack and pinion transmission assembly, or a synchronous belt transmission assembly, which is not specifically limited here.

[0043] Furthermore, to improve the stability of the cleaning brush 32 in its circumferential movement around the air duct tube 1 and ensure that the cleaning brush 32 maintains contact with the filter 2, a guide assembly 4 is provided along the circumferential direction of the outer wall of the air duct tube 1, and the cleaning brush 32 is slidably connected to the guide assembly 4. The guide assembly 4 guides the movement of the cleaning brush 32, preventing the cleaning brush 32 from jumping along the radial direction of the air duct tube 1, which would affect the cleaning of the lint on the filter 2.

[0044] In some embodiments, the guide assembly 4 includes a guide plate 41 disposed circumferentially along the outer wall of the air duct 1. The guide plate 41 is circumferentially provided with a guide hole 42. One end of the cleaning brush 32 passes through the guide hole 42 and is connected to the bracket 33. The guide hole 42 serves as a limit for the cleaning brush 32 in the radial direction of the air duct 1, preventing the cleaning brush 32 from radially jumping along the air duct 1 and ensuring that the cleaning brush 32 maintains contact with the filter 2.

[0045] In some other embodiments, the guide assembly 4 includes a guide plate 41 circumferentially arranged along the outer wall of the air duct 1, a guide groove is circumferentially provided on the guide plate 41, and a guide slider is provided on the cleaning brush 32, which is slidably arranged in the guide groove.

[0046] In order to effectively collect the scraped lint and prevent the scraped lint from adhering to other components of the clothes drying device and affecting the operation of other components, in some embodiments, referring to Figure 1 and Figure 3 As shown, the outer side of the air duct 1 is covered with a protective cover 5, forming a storage chamber between the protective cover 5 and the air duct 1. The filter 2 and the cleaning brush 32 are both placed in the storage chamber. A second air inlet 51 is provided on the protective cover 5 directly opposite the filter 2, and a chip removal port 52 is provided on the protective cover 5 opposite the second air inlet 51. The scraped wire scraps are placed in the storage chamber and do not fall onto other components. The wire scraps move within the storage chamber with the cleaning brush 32 and are discharged to a designated location through the chip removal port 52. The air exhausted from the drum enters the air duct 1 through the exhaust port, the second air inlet 51, and the first air inlet 11 in sequence.

[0047] A lint collection box can be connected to the lint removal opening 52 of the shield 5 to effectively collect lint and prevent it from adhering to other components within the clothes drying device. The lint collection box is detachably connected to the shield 5. Once filled with lint, the box can be removed, the contents discarded, and then reattached to the shield 5. This air duct structure not only effectively collects lint but also facilitates removal, making it easier for users to operate.

[0048] Based on the embodiment in which the shroud 5 is provided on the air duct 1, the guide assembly 4 is disposed within the shroud 5. Optionally, the guide plate 41 includes a first guide plate 411 and a second guide plate 412. The first guide plate 411 closes one end of the air duct 1. While closing the air duct 1, the edge of the first guide plate 411 protrudes from the outer wall of the air duct 1 along the circumference of the air duct 1. The second guide plate 412 is disposed along the circumference of the inner wall of the shroud 5, and is spaced apart from the first guide plate 411 to form a guide hole 42.

[0049] A fixing plate 413 is circumferentially protruded from one side of the first guide plate 411 . The fixing plate 413 and the first guide plate 411 are arranged to form a cylindrical structure. The structure is sleeved on one end of the air duct 1 so that the first guide plate 411 closes the end of the air duct 1 .

[0050] In some embodiments, the shield 5 is a cylindrical structure that is sleeved onto the outside of the air duct 1 and connected at one end to the outer wall of the air duct 1. The shield 5 is spaced apart from the end of the air duct 1. The chip removal driver 31 is fixedly mounted on the outer wall of the shield 5, and the bracket 33 is positioned between the shield 5 and the end of the air duct 1. During installation, the output end of the chip removal driver 31 passes through the shield 5 and is connected to the bracket 33. The output end of the chip removal driver 31 is sealed with the shield 5 to ensure the seal of the shield 5 and prevent wire chips from floating out of the shield 5.

[0051] In some other embodiments, the bracket 33 is arranged on the outside of the protective cover 5, and the end of the cleaning brush 32 connected to the bracket 33 passes through the protective cover 5 and is connected to the bracket 33. The cleaning brush 32 and the protective cover 5 are sealed to ensure the sealing of the protective cover 5.

[0052] Combine Figure 3 and Figure 4 As shown, in some embodiments, a plurality of cleaning brushes 32 are provided, and the plurality of cleaning brushes 32 are evenly spaced along the circumference of the air duct 1. The plurality of cleaning brushes 32 are connected to a debris removal driver 31, and the debris removal driver 31 drives the plurality of cleaning brushes 32 to move along the circumference of the air duct 1. The debris removal driver 31 drives the plurality of cleaning brushes 32 to rotate through an angle of less than 360°, so that the filter 2 can be cleaned once.

[0053] When multiple cleaning brushes 32 are provided, one chip removal driver 31 can simultaneously drive multiple cleaning brushes 32 to move synchronously. Multiple cleaning brushes 32 are respectively connected to the bracket 33. Optionally, the bracket 33 is an annular bracket, and a fixed block 34 is provided at the center of the bracket 33. The fixed block 34 is connected to the bracket 33 through multiple connecting rods 35, and the multiple connecting rods 35 are radially distributed on the inner side of the bracket 33. The chip removal driver 31 is connected to the fixed block 34, and the chip removal driver 31 is fixed. The chip removal driver 31 drives the fixed block 34 to rotate, thereby driving the bracket 33 to rotate. Multiple cleaning brushes 32 are arranged on the bracket 33 at intervals.

[0054] In the embodiment where multiple cleaning brushes 32 are provided, the bracket 33 is preferably provided between the shield 5 and the end of the air duct 1 to reduce the number of holes provided on the shield 5. Only the output end of the chip removal driver 31 needs to pass through the shield 5.

[0055] like Figure 2 and Figure 5As shown, illustratively, four cleaning brushes 32 are provided, and the four cleaning brushes 32 are evenly spaced along the circumference of the air duct 1. Four areas are formed between the four cleaning brushes 32. In a clockwise direction, the four cleaning brushes 32 are respectively defined as a first cleaning brush 321, a second cleaning brush 322, a third cleaning brush 323, and a fourth cleaning brush 324. The area between the first cleaning brush 321 and the second cleaning brush 322 is defined as area A, the area between the second cleaning brush 322 and the third cleaning brush 323 is defined as area B, the area between the third cleaning brush 323 and the fourth cleaning brush 324 is defined as area C, and the area between the fourth cleaning brush 324 and the first cleaning brush 321 is defined as area D. In actual application, the filter 2 is placed between the first cleaning brush 321 and the fourth cleaning brush 324 as the initial position. When the lint on the filter 2 needs to be cleaned, the lint removal driver 31 drives the bracket 33 to rotate 90° counterclockwise (or 90° clockwise). The first cleaning brush 321 scrapes the lint on the filter 2. As the bracket 33 rotates, the scraped lint is placed in area D and temporarily stored in area D. The filter 2 is placed between the first cleaning brush 321 and the second cleaning brush 322. When the lint on the filter 2 needs to be scraped again, the lint removal driver 31 drives the bracket 33 to rotate 90° counterclockwise again. The second cleaning brush 322 scrapes the lint on the filter 2. As the bracket 33 rotates, the scraps scraped for the second time are placed in area A and temporarily stored in area A. At the same time, area D is placed below the air duct 1, and the lint placed in area D falls by gravity. This cycle systematically scrapes away lint from the filter 2, which eventually falls to a designated area under its own gravity, achieving automatic cleaning of the lint. Each time the lint is cleaned, the lint removal driver 31 simply rotates the cleaning brush 32 by a preset angle, which is set based on the circumferential length of the filter 2 along the air duct 1. This improves the drying efficiency of the clothes drying apparatus.

[0056] The cleaning brush 32 includes a handle and a soft bristle disposed on the handle. The soft bristle can be fiber bristles, silicone bristles, or rubber bristles, which are not specifically limited here, to protect the filter 2 from damage when scraping lint. The handle is made of metal to improve the structural strength of the cleaning brush 32.

[0057] This embodiment also provides a clothes drying device, which can be a clothes dryer or a washer-dryer.

[0058] The clothes drying apparatus includes a drum and the aforementioned air duct device. A first air inlet 11 communicates with the drum's exhaust port, which is provided with a first exhaust assembly. This first exhaust assembly is configured to direct air within the drum toward the air duct 1, thereby improving the drying efficiency of the clothes drying apparatus. The first exhaust assembly includes a first fan, which, when activated, directs air within the drum toward the air duct 1.

[0059] The clothes drying device also includes an exhaust duct and a second exhaust assembly. One end of the exhaust duct is connected to the other end of the air duct pipe 1, which is then connected to the external environment. The second exhaust assembly is configured to allow air within the air duct pipe 1 to flow through the exhaust duct, out of the exhaust duct, and then discharged into the external environment. The second exhaust assembly includes a second fan, which operates to discharge air within the exhaust duct into the external environment, thereby improving the operating efficiency of the clothes drying device.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Air duct device, characterized in that, include: An air duct (1), one end of the air duct (1) being closed, a side wall of the air duct (1) being provided with a first air inlet (11), and a filter (2) being provided at the first air inlet (11); A chip removal assembly (3) comprises a chip removal driver (31) and a cleaning brush (32), wherein the chip removal driver (31) is connected to the cleaning brush (32) in a driving manner, wherein the length direction of the cleaning brush (32) extends along the axial direction of the air duct (1) and can contact the filter screen (2), and the chip removal driver (31) is used to drive the cleaning brush (32) to move along the circumferential direction of the air duct (1).

2. The air duct device according to claim 1, characterized in that: The chip removal driver (31) is arranged at the end of one end of the air duct (1), and the chip removal assembly (3) also includes a bracket (33). The chip removal driver (31) is drivingly connected to the bracket (33), and one end of the cleaning brush (32) is connected to the bracket (33).

3. The air duct device according to claim 2, characterized in that: A guide assembly (4) is provided on the outer side wall of the air duct (1) along the circumferential direction, and the cleaning brush (32) is slidably connected to the guide assembly (4).

4. The air duct device according to claim 3, characterized in that: The guide assembly (4) comprises a guide plate (41) arranged circumferentially along the outer wall of the air duct (1); the guide plate (41) is provided with a guide hole (42) along the circumference; one end of the cleaning brush (32) passes through the guide hole (42) and is connected to the bracket (33).

5. The air duct device according to any one of claims 2 to 4, characterized in that: The outer side of the air duct tube (1) is provided with a protective cover (5), and a receiving cavity is formed between the protective cover (5) and the air duct tube (1), and the filter screen (2) and the cleaning brush (32) are both placed in the receiving cavity. A second air inlet (51) is provided at a position where the protective cover (5) and the filter screen (2) are opposite, and a chip discharge port (52) is provided on the protective cover (5) at a position opposite to the second air inlet (51).

6. The air duct device according to claim 5, characterized in that: The shield (5) is a cylindrical structure. The shield (5) is sleeved on the outside of the air duct tube (1) and the end thereof is connected to the outer wall of the air duct tube (1). The shield (5) and the end of the air duct tube (1) are spaced apart. The chip removal driver (31) is fixedly arranged on the outer wall of the shield (5). The bracket (33) is arranged between the shield (5) and the end of the air duct tube (1).

7. The air duct device according to any one of claims 1 to 4, characterized in that: There are a plurality of cleaning brushes (32), and the plurality of cleaning brushes (32) are arranged at equal intervals along the circumference of the air duct tube (1). The plurality of cleaning brushes (32) are connected to the chip removal driver (31), and the chip removal driver (31) drives the plurality of cleaning brushes (32) to move along the circumference of the air duct tube (1).

8. The air duct device according to any one of claims 1 to 4, characterized in that: The cross section of the air duct (1) is circular.

9. Clothes drying equipment, characterized in that, It comprises a drum and an air duct device according to any one of claims 1 to 8, wherein the first air inlet (11) is connected to the air outlet of the drum, and a first exhaust component is provided at the air outlet of the drum, and the first exhaust component is used to make the air in the drum flow to the air duct pipe (1).

10. The clothes drying device according to claim 9, characterized in that: The clothes drying device further comprises an exhaust duct and a second exhaust assembly, one end of the exhaust duct being connected to the other end of the air duct pipe (1), the other end of the exhaust duct being connected to the external environment, and the second exhaust assembly being used to allow the air in the air duct pipe (1) to pass through the exhaust duct and flow out of the exhaust duct.

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