Air duct system of a clothes dryer and clothes dryer

Abstract

This invention discloses an air duct system for a clothes dryer and the dryer itself. The air duct system includes a drum with lifting ribs on its inner wall. A first air duct is formed within the inner cavity of the lifting ribs for introducing drying air into the drum. It also includes a guide structure disposed on the lifting ribs to guide the drying air from the first air duct into the drum. This invention, by providing a guide structure on the lifting ribs, facilitates guiding the drying air from the first air duct into the drum, improving the airflow efficiency and thus enhancing the drying effect on clothes.

Description

Technical Field

[0001] This invention belongs to the field of household appliances, specifically relating to an air duct system for a clothes dryer and the clothes dryer itself. Background Technology

[0002] A clothes dryer is a household appliance that uses heated air to quickly evaporate the moisture from washed clothes. Clothes dryers are popular due to their fast drying capabilities, and as market demand increases, so do the requirements for drying performance. Existing drum dryers use a method where heated air is introduced from the bottom of the drum and exits through lifting ribs. However, the main function of the lifting ribs is to move the clothes and prevent them from tangling. To achieve this, the lifting ribs need to protrude a certain height from the inner wall of the drum, resulting in a large air cavity that lacks air concentration and has low blowing efficiency. Furthermore, as the drying air vents from back to front within the lifting ribs, the airflow gradually decreases, leading to lower air pressure in the area in front of the lifting ribs and poorer drying of clothes in the front of the drum.

[0003] For example, Chinese patent application number CN202020947038.0 discloses a washer-dryer combo machine, including an outer cylinder; an inner cylinder disposed in the outer cylinder for containing laundry; a drying assembly including a heater for heating gas and a drying air duct; the inner cylinder includes a bottom wall and a peripheral side wall, the peripheral side wall being provided with multiple lifting ribs, the bottom wall and the lifting ribs both having hollow cavities inside, the lifting ribs and the cavities of the bottom wall communicating to form the drying air duct, the heater being connected to the drying air duct via a first connecting pipe, each lifting rib having multiple air inlets, the first connecting pipe, the drying air duct and the air inlets forming a hot air passage, supplying air from the periphery of the inner cylinder to the center of the inner cylinder.

[0004] In the above scheme, the clothes at the back of the drum are dried better, while the clothes at the front are dried worse.

[0005] In view of the above-mentioned technical deficiencies, this invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a duct system for a clothes dryer that can guide the airflow and improve the airflow efficiency.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] A duct system for a clothes dryer includes a drum with lifting ribs on its inner wall and a first duct in the inner cavity of the lifting ribs for introducing drying air into the drum.

[0009] It also includes a flow guiding structure, which is set on the lifting ribs to guide the drying air from the first air duct into the drum.

[0010] By adopting the above scheme, it is easier to guide the drying air from the first air duct into the drum, thereby improving the air outlet efficiency of the drying air and thus improving the drying effect on clothes.

[0011] Furthermore, the flow guiding structure is disposed within the lifting rib;

[0012] The back of the lifting rib is connected to the inner wall of the roller, and the front is provided with an air outlet that communicates with the first air duct.

[0013] The internal flow guiding structure forms a flow guiding channel, which is connected to the air outlet and the first air duct respectively, and is used to guide the drying air from the first air duct through the air outlet into the drum; or the flow guiding structure and the lifting ribs cooperate to form the flow guiding channel.

[0014] Preferably, the lifting ribs are disposed on the side wall of the roller.

[0015] By adopting the above solution, the flow guiding structure is set inside the lifting ribs, which will not occupy the internal space of the roller, nor will it scratch the clothes.

[0016] Furthermore, the inner cavity of the lifting rib is configured as the first air duct, and the flow guiding structure is a plate-shaped structure disposed in the first air duct, at least downstream of the first air duct, and the flow guiding structure cooperates with the front wall of the lifting rib to form the flow guiding channel.

[0017] The width of the guide channel along the radial direction of the drum is smaller than the width of the inner cavity of the lifting rib along the radial direction of the drum.

[0018] By adopting the above solution, the air pressure in the airflow channel is increased, thereby improving the air outlet efficiency.

[0019] Furthermore, the length of the flow guiding structure along the roller axis is close to the length of the lifting rib, and the flow guiding channel formed by the flow guiding structure and the inner wall of the lifting rib is configured as the first air duct.

[0020] By adopting the above scheme, the drying air can be completely introduced into the drum through the guide channel, which improves the overall air guiding efficiency. In addition, while ensuring that the lifting ribs protrude sufficiently from the inner wall of the drum, the width and volume of the first air duct are narrowed, the air pressure is increased, and the air outlet efficiency is improved.

[0021] Furthermore, the airflow channel gradually narrows along the air outlet direction.

[0022] By adopting the above solution, the deficiency of small air volume at the end of the guide channel can be compensated, the air pressure at the end of the guide channel can be increased, and the air outlet efficiency at the end of the guide channel can be improved.

[0023] Furthermore, the angle between the air outlet and the wind direction at the corresponding location of the air outlet in the first air duct is less than 90 degrees.

[0024] Furthermore, it also includes a second air duct, which is connected to the first air duct and is located at the bottom of the drum, for introducing drying air into the first channel;

[0025] The air outlet is inclined to one side of the bottom of the drum towards the opening on the front wall of the lifting rib, forming an acute angle with the front wall of the lifting rib.

[0026] By adopting the above solution, the drying air is discharged from the air outlet perpendicular to the first air duct in the existing technology, which prevents the air direction from changing drastically when the drying air enters the air outlet from the first air duct, reduces excessive wind resistance, and facilitates the discharge of the drying air from the air outlet.

[0027] Furthermore, the second air duct is disposed on the bottom wall of the drum, extends from the bottom wall of the drum along the inner wall of the drum to the side wall of the drum, and communicates with the first air duct to form a drying channel;

[0028] The second air duct has a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the drum.

[0029] Furthermore, it also includes an air inlet housing, which is a cover structure and is located on the inner side of the bottom wall of the drum;

[0030] The air inlet housing extends along the inner wall of the drum to the side wall of the drum and is connected to the lifting rib. The air inlet housing forms a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the drum.

[0031] The inner wall of the roller at the position corresponding to the arc-shaped structure is connected to the flow guiding structure;

[0032] The air inlet housing and the inner wall of the drum cooperate to form the second air duct.

[0033] By adopting the above scheme, a smooth connection between the second air duct and the first air duct is achieved, further reducing wind resistance.

[0034] Another object of the present invention is to provide a clothes dryer having the above-described air duct system.

[0035] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0036] 1. A guide structure is set on the lifting ribs to facilitate the guidance of drying air from the first air duct into the drum, which improves the air outlet efficiency of the drying air and thus improves the drying effect on clothes.

[0037] 2. The width of the guide channel along the radial direction of the drum is less than the height of the inner cavity of the lifting rib along the width direction of the drum. That is, the guide channel is narrower, which helps to increase the air pressure in the guide channel and thus improve the air outlet efficiency.

[0038] 3. The guide channel gradually narrows along the air outlet direction, which can compensate for the small air volume at the end of the guide channel, improve the air pressure at the end of the guide channel, and facilitate the improvement of the air outlet efficiency at the end of the guide channel; the angle formed between the air outlet and the air direction in the first air duct is less than 90 degrees, which prevents the air direction from changing drastically when the drying air enters the air outlet from the first air duct, reduces excessive air resistance, and facilitates the discharge of the drying air from the air outlet.

[0039] 4. The second air duct has a smooth arc-shaped structure at the bend at the bottom of the drum, which is smoothly connected to the first air duct, reducing the air resistance when the drying air flows in the drying air duct.

[0040] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0042] Figure 1 This is a schematic diagram of the air duct system of the present invention;

[0043] Figure 2 This is a schematic diagram of the installation structure of the drying air duct, the regulating part, and the bottom of the drum of the present invention;

[0044] Figure 3 yes Figure 2 Another structural diagram from a different angle;

[0045] Figure 4 Figure 1 A schematic diagram of the cross-sectional structure;

[0046] Figure 5 yes Figure 4 Enlarged view of part A in the middle.

[0047] In the diagram: 1. Drum; 11. Bottom of the drum; 111. Air inlet; 12. Drum opening; 13. Drum shaft; 2. Lifting rib; 20. First air duct; 21. Air outlet; 201. Front wall; 202. Top wall; 3. Guide structure; 31. Guide channel; 32. Connecting part; 4. Air inlet shell; 401. First shell; 41. Second air duct; 411. First section; 412. Second section; 413. Third section; 5. Adjustment part; 6. Drying air duct; 71. Drive motor; 72. Rotating shaft; 73. Actuating arm.

[0048] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In the description of this invention, it should be noted that the terms "upper," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] like Figures 1 to 5 As shown, the present invention discloses an air duct system for a clothes dryer, including a drum 1 with lifting ribs 2 on its inner wall and a first air duct 20 in the inner cavity of the lifting ribs 2 for introducing drying air into the drum 1; and a guide structure 3 disposed on the lifting ribs 2 for guiding the drying air from the first air duct 20 into the drum 1.

[0053] The flow guiding structure 3 is disposed within the lifting rib 2 to at least narrow the local air duct of the first air duct 20 and guide the drying air from the first air duct 20 into the drum 1.

[0054] The first air duct 20 is an air duct structure disposed within the lifting rib 2, or the first air duct 20 is formed by the inner cavity of the lifting rib 2.

[0055] The airflow guiding structure 3 of the present invention facilitates the guidance of drying air from the first air duct 20 into the drum 1, thereby improving the airflow efficiency of the drying air and thus improving the drying effect on clothes.

[0056] like Figure 3 and Figure 4 As shown, the flow guiding structure 3 is disposed inside the lifting rib 2; the back of the lifting rib 2 is connected to the inner wall of the drum 1, and the front is provided with an air outlet 21 communicating with the first air duct 20, for passing the drying air in the first air duct 20 into the drum 1.

[0057] like Figures 1 to 3 As shown, there are multiple air outlets 21, which are evenly distributed on the front wall 201 of the lifting rib 2; or, the number of air outlets 21 on the lifting rib 2 gradually increases along the air outlet direction, and the configuration is such that the number of air outlets 21 located upstream of the lifting rib 2 is less than the number of air outlets 21 located downstream.

[0058] The flow guiding structure 3 is set inside the lifting rib 2, which will not occupy the internal space of the roller 1, nor will it scratch the clothes.

[0059] The narrowed portion of the first air duct 20 is configured as a flow guide channel 31, which is formed by the flow guide structure 3, or by the flow guide structure 3 in combination with the first air duct 20.

[0060] Specifically, the guide structure 3 is a hollow structure with an internal guide channel 31, which is connected to the first air duct 20 and at least part of the air outlet 21, respectively, to guide the drying air from the first air duct 20 into the drum 1 through the air outlet 21. The guide channel is configured as an extension of the first air duct 20; or, the hollow guide structure 3 is disposed in the first air duct 20, and the guide channel 31 is configured as a partial air duct of the first air duct 20.

[0061] Or, such as Figure 4 As shown, the flow guiding structure 3 and the inner wall of the lifting rib 2 cooperate to form the flow guiding channel 31.

[0062] Furthermore, such as Figure 4 As shown, the lifting rib 2 is disposed on the side wall of the roller 1, and the length direction of the lifting rib 2 is arranged along the axial direction of the roller 1.

[0063] like Figure 3 and Figure 4As shown, the inner cavity of the lifting rib 2 is configured as the first air duct 20, and the flow guiding structure 3 is a plate-like structure located at least downstream of the first air duct 20. The flow guiding structure 3 cooperates with the front wall 201 of the lifting rib 2 or with the front wall 201 and side wall of the lifting rib 2 to form the flow guiding channel 31. The width of the flow guiding channel 31 along the radial direction of the roller 1 is smaller than the width of the inner cavity of the lifting rib 2 along the radial direction of the roller 1.

[0064] The flow channel 31 is configured as part of the first air duct 20, and the drying air flowing through the flow structure 3 flows out completely from the front of the flow structure 3 through the flow channel 31.

[0065] In one implementation scheme, the guide structure 3 is a plate-like structure, disposed within the first air duct 20 formed by the inner cavity of the lifting rib 2, located downstream of the first air duct 20. One end of the guide structure 3 is sealed to the back of the lifting rib 2, and the other end is sealed to the front wall 201 of the lifting rib 2 or the top wall 202 of the lifting rib 2 facing the cylinder opening 12 of the drum 1, dividing the space downstream of the lifting rib 2 into two non-communicating chambers. The chamber located in the front is configured as the guide channel 31, and the chamber located in the rear is a sealed chamber that does not have an air outlet function. Alternatively, the plate-like guide structure 3 has a certain thickness and is disposed on the back of the lifting rib 2, located downstream of the first air duct 20, narrowing the width of the downstream section of the first air duct 20.

[0066] Since the air volume is large upstream and small downstream in the first air duct 20, in order to ensure the drying effect of clothes located downstream of the first air duct 20 in the drum 1, the guide channel 31 can be set only downstream of the first air duct 20 to narrow the width of the drying airflow channel, increase the air pressure in the guide channel 31, and thus improve the air outlet efficiency.

[0067] like Figure 3 and Figure 4 As shown, the length of the guide structure 3 along the axial direction of the drum 1 is close to the length of the lifting rib 2. The guide structure 3, together with the front wall 201 and side wall of the lifting rib 2, forms a guide channel 31, which is configured as the first air duct 20. This design allows the drying air to be completely introduced into the drum 1 through the guide channel 31, thus improving the overall air guiding efficiency. In addition, while ensuring that the lifting rib 2 protrudes sufficiently from the inner wall of the drum 1, the width of the first air duct 20 is narrowed, increasing the air pressure and thus improving the air outlet efficiency.

[0068] like Figure 4 As shown, the flow channel 31 gradually narrows along the air outlet direction, and the distance between the flow guide structure 3 and the front wall 201 of the lifting rib 2 gradually decreases along the air outlet direction.

[0069] Specifically, such as Figure 4As shown, the front wall 201 of the lifting rib 2 is a planar structure, parallel to the central axis of the roller 1, and the flow guiding structure 3 is inclinedly arranged inside the lifting rib 2, gradually approaching the front wall 201 of the lifting rib 2 along the air outlet direction.

[0070] The structure of the guide channel 31 of the present invention, which gradually narrows along the air outlet direction, can compensate for the defect of small air volume at the end of the guide channel 31, improve the air pressure at the end of the guide channel 31, and facilitate the improvement of the air outlet efficiency at the end of the guide channel 31.

[0071] The angle between the air outlet 21 and the corresponding air direction in the first air duct 20 where the air outlet 21 is located is less than 90 degrees. This is to prevent the drying air from changing direction drastically when entering the air outlet 21 from the first air duct 20, which would result in excessive air resistance and make it difficult for the drying air to be discharged from the air outlet 21.

[0072] Specifically, such as Figure 4 and Figure 5 As shown, the air duct system of the present invention further includes a second air duct 41, which is connected to the first air duct 20 and is disposed at the bottom of the drum 1 for introducing drying air into the first channel; the drying air is configured to enter the drum 1 from the bottom 11 to the opening 12 along the axial direction of the drum 1; the air outlet 21 is inclined along the bottom 11 to the opening 12 of the drum 1 on the front wall 201 of the lifting rib 2, forming an acute angle with the front wall 201 of the lifting rib 2.

[0073] Of course, the second air duct 41 can also be set at the cylinder opening 12 of the drum 1. The drying air enters from the cylinder opening 12 towards the cylinder bottom 11 along the axial direction of the drum 1. The air outlet 21 is inclined along the cylinder opening 12 towards the cylinder bottom 11 on the front wall 201 of the lifting rib 2. Alternatively, the second air duct 41 can also be set on the side of the drum 1. The drying air enters from the middle of the first air duct 20 perpendicular to the central axis of the drum 1, and then flows along the axial direction of the drum 1 towards the cylinder opening 12 and the cylinder bottom 11 respectively. Taking the air inlet of the first air duct 20 as the dividing point, the air outlet 21 located at the air inlet facing the cylinder bottom 11 is inclined towards the cylinder bottom 11, and the air outlet 21 located at the air inlet facing the cylinder opening 12 is inclined towards the cylinder opening 12. The air outlet 21 corresponding to the position of the air inlet is perpendicular to the front wall 201 of the lifting rib 2.

[0074] Furthermore, such as Figure 4 As shown, the second air duct 41 is disposed on the bottom wall of the drum 1, extends from the bottom wall of the drum 1 along the inner wall of the drum 1 to the side wall of the drum 1, and communicates with the first air duct 20 to form a drying channel; the second air duct 41 has a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the drum 1.

[0075] Specifically, such as Figure 4As shown, the second air duct 41 includes a first section 411 along the air outlet direction, which is a horizontal section and is disposed on the bottom wall of the roller 1; a second section 412, which is an inclined transition section and is configured as a smooth bend in the second air duct 41; and a third section 413, which is an arc transition section and is configured as the arc structure for smooth connection with the first air duct 20.

[0076] The lengths of the second segment 412 and the third segment 413 are respectively less than the length of the first segment 411.

[0077] like Figure 1 and Figure 4 As shown, the air duct system of the present invention also includes an air inlet housing 4, which is a cover structure and is disposed on the inner side of the bottom wall of the roller 1. The air inlet housing 4 extends along the inner wall of the roller 1 to the side wall of the roller 1 and is connected to the lifting rib 2. The air inlet housing 4 forms a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the roller 1. The connection between the bottom wall and the side wall of the roller 1 corresponding to the position of the arc-shaped structure is smoothly connected to the flow guiding structure 3, that is, the downstream end of the third segment 413 is smoothly connected to the upstream end of the flow guiding structure 3. The air inlet housing 4 and the inner wall of the roller 1 cooperate to form the second air duct 41.

[0078] The lifting rib 2 is also a cover structure, with its open side connected to the side wall of the roller 1. The flow guiding structure 3 is disposed inside the lifting rib 2, and the flow guiding channel 31 formed by cooperating with the front wall 201 of the lifting rib 2 is configured as the first air duct 20. The air inlet housing 4 is connected to the front wall 201 of the lifting rib 2, and the flow guiding structure 3 is connected to the inner wall of the roller 1 at the corresponding third section 413, thereby realizing the connection between the first air duct 20 and the second air duct 41.

[0079] like Figure 3 and Figure 4 As shown, the back of the flow guiding structure 3 is provided with a connecting part 32 for connecting with the inner wall of the roller 1. The flow guiding structure 3 can be installed on the inner wall of the roller 1, which can ensure the stability of the flow guiding structure 3. In addition, after the lifting rib 2 is connected to the roller 1, it can also be connected to the roller 1 through the flow guiding structure 3, which further ensures the stability of the lifting rib 2.

[0080] The bottom wall of the roller 1 is provided with an air inlet hole 111, and the air inlet housing 4 covers the air inlet hole 111. The drying air is introduced into the second air duct 41 through the air inlet hole 111.

[0081] Furthermore, the air inlet 111 is provided with multiple holes, and the air inlet housing 4 covers part of the air inlet 111. Preferably, the bottom 11 of the drum 1 is covered with the air inlet 111, and the bottom 11 has a hollow mesh structure to increase the air outlet area of ​​the drying air, thereby improving the drying efficiency of clothes.

[0082] The air duct system of the present invention also includes an adjustment unit 5, which is disposed on the air inlet 111 and is used to adjust the air inlet area and / or air inlet direction of the air inlet 111.

[0083] The adjustment part 5 provided on the air inlet 111 of the present invention can adjust the air inlet area and / or air inlet direction of the air inlet 111, so as to make it easier to adjust the drying air according to the amount of clothes and the position distribution of the clothes, thereby realizing the effective use of the drying air and improving the drying efficiency.

[0084] The adjustment section 5 is a cover plate structure that covers part of the air inlet holes 111, used to adjust the area of ​​air entering the drum 1. The cover plate structure adjusts the area of ​​the covered air inlet holes 111 to regulate the area of ​​the drying air outlet. When a fixed air volume is supplied to all air inlet holes 111, the overall outlet area is reduced, thus regulating the air pressure. When a fixed air volume is supplied to a single air inlet hole 111, the overall ventilation volume is reduced, thereby regulating the air volume entering the drum.

[0085] Or, such as Figures 1 to 3 As shown, the adjustment part 5 is a cover structure, at least covering part of the air inlet hole 111, and forming an air cavity with the air inlet hole 111; the cover structure has an air outlet facing a different direction than the air inlet hole 111, which is used to ventilate the roller 1 in a direction different from the air inlet hole 111, so that the adjustment part 5 has the function of changing the air direction.

[0086] like Figures 1 to 3 As shown, the adjustment part 5 is connected to the first section 411 of the second air duct 41. The drying air from the adjustment part 5 enters the first air duct 20 through the second air duct 41 and is introduced into the drum 1 through the air outlet 21.

[0087] The drying air can enter the drum 1 through both the air inlet 111 and the drying air duct 6, thus achieving a dispersion effect. If there are many clothes near the air inlet 111, the area of ​​the air inlet 111 covered by the adjusting part 5 can be reduced, so that the drying air mainly enters through the air inlet 111, increasing the contact area between the drying air and the clothes. If there are many clothes near the air outlet 21, the area of ​​the air inlet 111 covered by the adjusting part 5 can be increased, so that the drying air mainly enters the drum 1 through the drying air duct 6, thereby increasing the contact area between the drying air and the clothes.

[0088] The adjustment unit 5 of the present invention is connected to the second air duct 41, and the drying air in the adjustment unit 5 is introduced into the drying air duct 6, thereby realizing the redistribution of the drying air volume at different positions in the drum 1, which facilitates the improvement of drying efficiency.

[0089] like Figure 2 and Figure 3 As shown, the position of the air inlet housing 4 corresponding to the first segment 411 is configured as the first housing 401. The cover structure of the first housing 401 is the same as the structure of the adjustment part 5. The cover part is the air inlet hole 111, which cooperates with the air inlet hole 111 to form an air inlet cavity. The side wall of the first housing 401 is provided with an opening that matches and communicates with the air outlet.

[0090] Furthermore, the adjustment part 5 is a foldable structure and / or a telescopic structure.

[0091] Specifically, the adjusting part 5 is formed by at least two hinged parts, with adjacent parts folded together to achieve folding; or the adjusting part 5 is a soft structure that can be folded arbitrarily; or, as... Figure 2 As shown, the adjustment part 5 is formed by at least two retractable structures; or the adjustment part 5 cooperates with the first shell 401 to form the retractable structure, and the adjustment part 5 can be retracted into the first shell 401 or extended from the first shell 401.

[0092] The adjustment unit 5 can be opened and closed manually or automatically.

[0093] When the adjustment unit 5 is automatically controlled, the air duct system of the present invention further includes a drive device connected to the adjustment unit 5 for controlling the opening and closing state of the adjustment unit 5.

[0094] like Figure 4 As shown, the driving device includes a drive motor 71, which is mounted on the roller 1 and is used to provide driving force for controlling the opening and closing state of the adjustment part 5; a rotating shaft 72, which is connected to the drive motor 71 and the drive motor 71 can drive the rotating shaft 72 to rotate; and a toggle arm 73, which is connected to the rotating shaft 72 and the adjustment part 5 respectively, and is used to toggle the adjustment part 5 to realize the opening and closing of the adjustment part 5.

[0095] The two ends of the actuating arm 73 are fixedly connected to the rotating shaft 72 and the adjusting part 5, respectively.

[0096] Specifically, such as Figure 4 As shown, the air inlet 111, the adjustment part 5 and the driving device are all arranged on the bottom wall of the roller 1, and the rotating shaft 72 is coaxially arranged with the cylinder shaft 13 of the roller 1.

[0097] The drive motor 71 is located on the back of the bottom 11 of the drum 1. One end of the rotating shaft 72 is connected to the drive motor 71, and the other end passes through the bottom 11 and is connected to the adjustment part 5.

[0098] The cylindrical shaft 13 is connected to the drive motor 71, which can drive the cylindrical shaft 13 to rotate the roller 1, and is configured as the power unit of the roller 1; preferably, the cylindrical shaft 13 and the rotating shaft 72 are in a sleeve structure, and the cylindrical shaft 13 is sleeved on the outside of the rotating shaft 72.

[0099] The roller 1 and the adjustment part 5 of the present invention can be driven by the same drive motor 71, which simplifies the overall structure of the air duct system and saves costs.

[0100] As one implementation, the air duct system of the present invention has at least two sets.

[0101] Another object of the present invention is to provide a clothes dryer having the above-described air duct system.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An air duct system for a clothes dryer, comprising, The drum has lifting ribs on its inner wall and air inlet holes on its bottom wall; The front part of the lifting rib is provided with an air outlet, and its interior is provided with a first air duct for introducing drying air into the drum. characterized in that The back of the lifting rib is connected to the inner wall of the roller, and its front part is provided with an air outlet communicating with the first air duct; the air duct system further includes: A flow guiding structure is disposed within the lifting ribs, forming a flow guiding channel that gradually narrows along the air outlet direction. The flow guiding structure contains internal flow guiding channels that communicate with both the air outlet and the first air duct, guiding the drying air from the first air duct through the air outlet into the drum. Alternatively, the flow guiding structure can be combined with the lifting rib to form the flow guiding channel; The air inlet housing is a cover structure that is connected to the bottom wall of the roller to cover the air inlet hole, connected to the lifting rib, and forms a second air duct with the bottom wall of the roller that communicates with the first air duct. The adjustment section, a cover structure, is located on the bottom wall of the drum and communicates with the air inlet housing to form an air cavity. It can be folded or extended and rotated relative to the air inlet housing via a drive device to adjust its coverage area with the air inlet hole. Based on the position of the clothes inside the drum, it guides the drying air along the air cavity and the second air duct into the first air duct, and then into the drum through the air outlet. Alternatively, part of the drying air can be guided directly into the drum through the air inlet, while the other part can enter the first air duct along the air chamber and the second air duct, and then enter the drum through the air outlet.

2. The air duct system of a clothes dryer according to claim 1, wherein The adjustment section at least covers part of the air inlet hole and cooperates with the air inlet hole to form an air cavity; The cover structure has an air outlet facing a different direction than the air inlet, which is used to ventilate the inside of the drum in a direction different from the air inlet.

3. The air duct system of a clothes dryer according to claim 1, wherein The lifting ribs are disposed on the side wall of the roller.

4. The air duct system of a clothes dryer according to claim 2, wherein The inner cavity of the lifting rib is configured as the first air duct, and the flow guiding structure is a plate-shaped structure disposed in the first air duct, at least downstream of the first air duct. The flow guiding structure cooperates with the front wall of the lifting rib to form the flow guiding channel. The width of the guide channel along the radial direction of the drum is smaller than the width of the inner cavity of the lifting rib along the radial direction of the drum.

5. The air duct system of a clothes dryer according to claim 3, wherein The length of the flow guiding structure along the roller axis is close to the length of the lifting rib, and the flow guiding channel formed by the flow guiding structure and the inner wall of the lifting rib is configured as the first air duct.

6. The air duct system of a clothes dryer according to claim 1, wherein The angle between the air outlet and the wind direction at the corresponding location of the air outlet in the first air duct is less than 90 degrees.

7. The air duct system of a clothes dryer according to claim 6, characterized in that, It also includes a second air duct, which is connected to the first air duct and is located at the bottom of the drum, for introducing drying air into the first air duct; The air outlet is inclined to one side of the bottom of the drum towards the opening on the front wall of the lifting rib, forming an acute angle with the front wall of the lifting rib.

8. The air duct system of a clothes dryer according to claim 7, characterized in that, The second air duct is set on the bottom wall of the drum, extends from the bottom wall of the drum along the inner wall of the drum to the side wall of the drum, and communicates with the first air duct to form a drying air duct. The second air duct has a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the drum.

9. The air duct system of a clothes dryer according to claim 1, wherein The air inlet housing extends along the inner wall of the drum to the side wall of the drum and is connected to the lifting rib. The air inlet housing forms a smooth arc-shaped structure at the connection between the bottom wall and the side wall of the drum. The inner wall of the drum corresponding to the position of the arc-shaped structure is connected with the flow guide structure.

10. A clothes dryer characterized by comprising: The air duct system has any one of claims 1-9.

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