Exhaust device of washing and drying all-in-one machine

Abstract

The utility model discloses an air exhaust device of a washing and drying all-in-one machine, which comprises a ventilation pipe, a dust exhaust pipe, a dust exhaust fan and a dust exhaust fan, the filter screen is rotatably mounted in the ventilation cavity; the first driving assembly is in transmission connection with the filter screen and used for driving the filter screen to turn over, so that the filter screen is erected or put down to be close to the dust discharging opening, and when the filter screen is erected, cotton fibers in air passing through the ventilation cavity can be intercepted; the dust collection box comprises a mounting shell and a box body which is mounted on the mounting shell in a drawable manner, the mounting shell is mounted below the ventilation pipe and is aligned to the dust discharge port, and when the filter screen is put down, the box body can collect cotton fibers falling from the filter screen. The filter screen is driven to turn over through the first driving assembly, when the filter screen is put down, cotton fibers can automatically fall into the dust collection box, a user only needs to regularly pull the dust collection box to take out and clean the dust collection box, the user can clean the filter screen without disassembling the washing machine, operation is easy and convenient, and the use difficulty of the user is greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of washer-dryer combos, and more particularly to an exhaust device for an washer-dryer combo. Background Technology

[0002] In modern family life, washer-dryer combos are a convenient household appliance that combines washing and drying functions, greatly simplifying daily clothing handling. During the drying process, to prevent lint and other impurities from being expelled with the air, a filter is usually installed in the drying exhaust duct. However, after prolonged use, a large amount of lint gradually accumulates on the filter. As the lint accumulates, the filter's permeability is severely affected, leading to poor ventilation. This not only reduces drying efficiency but may also adversely affect the normal operation of the machine, even increasing energy consumption and shortening the equipment's lifespan.

[0003] What's even more problematic is that most washer-dryer combos on the market require manual operation to clean the filter. Users must disassemble the washing machine to access and remove the filter for cleaning. This process is not only tedious and complicated, requiring certain technical skills and tools, but also poses certain safety hazards, increasing users' maintenance costs and burden, and greatly affecting the user experience. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide an exhaust device for a washer-dryer combo that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A ventilation device for a washer-dryer combo includes:

[0007] The ventilation duct has an internal ventilation cavity and a dust discharge port at the bottom.

[0008] The filter screen is rotatably installed inside the ventilation cavity;

[0009] The first drive component is connected to the filter screen and is used to drive the filter screen to flip, so that the filter screen is upright or laid down near the dust discharge port. When the filter screen is upright, it can intercept cotton fibers in the air passing through the ventilation cavity.

[0010] The dust collection box includes a mounting shell and a retractable box body installed on the mounting shell. The mounting shell is installed below the ventilation duct and aligned with the dust discharge port. When the filter screen is folded down, the box body can collect the lint that falls from the filter screen.

[0011] Optionally, the filter screen includes a screen body and a first rotating shaft connected to the bottom side of the screen body, and the first driving component is connected to the first rotating shaft to drive the filter screen to flip.

[0012] Optionally, the first drive assembly includes a motor, a worm gear, and a first gear. The worm gear is connected to the motor, and the first gear is connected to the first rotating shaft. The worm gear meshes with the first gear to enable the motor to drive the filter screen to flip.

[0013] Optionally, the inner wall of the ventilation cavity is provided with a baffle frame located on the leeward side of the filter screen, and when the filter screen is upright, the periphery of the leeward side of the filter screen abuts against the baffle frame.

[0014] Optionally, it also includes an electrostatic dust collection component, installed below the ventilation duct and aligned with the dust outlet. The dust collection box is installed below the electrostatic dust collection component. When the filter screen is laid down, the electrostatic dust collection component can adsorb the lint on the filter screen when it is powered on. When the electrostatic dust collection component is powered off, the lint on its surface can automatically fall down into the box.

[0015] Optionally, the electrostatic dust collection assembly includes a mounting frame, a plurality of electrostatic adsorption plates, and a second driving assembly. The upper and lower sides of the mounting frame are respectively connected to the ventilation pipe and the mounting shell. The plurality of electrostatic adsorption plates are horizontally arrayed and rotatably mounted in the mounting frame. The second driving assembly is drivenly connected to all the electrostatic adsorption plates to drive all the electrostatic adsorption plates to rotate synchronously. When the electrostatic adsorption plates are laid flat, they can approach the filter screen and adsorb lint. When the electrostatic adsorption plates are tilted, the lint on their surface can automatically fall downwards into the box.

[0016] Optionally, the electrostatic adsorption plate includes a fixedly connected adsorption plate body and a second rotating shaft. The second driving assembly includes a rack, a second gear, and a linear driver. One end of each second rotating shaft is equipped with a second gear. The rack meshes with all the second gears simultaneously. The linear driver is connected to the rack and drives the rack to reciprocate linearly, thereby synchronously driving all the electrostatic adsorption plates to flip.

[0017] Optionally, the linear actuator is a resilient telescopic electromagnet.

[0018] Optionally, a baffle is provided in the mounting frame below the electrostatic adsorption plate. Each electrostatic adsorption plate is provided with a corresponding baffle. When the electrostatic adsorption plate is flipped to an inclined state, it can hit the baffle, causing the cotton wool on the surface of the electrostatic adsorption plate to be shaken off.

[0019] Optionally, a groove is provided on one side of the box body, and a flip-up handle is installed in the groove. The handle can be stored in the groove or extended out of the groove by flipping it.

[0020] The beneficial effects of this application are as follows: This utility model provides an exhaust device for a washer-dryer combo. A first drive component drives the filter screen to flip, and when the filter screen is tilted, lint automatically falls into the dust collection box. Users only need to periodically pull out and clean the dust collection box, eliminating the need to disassemble the washing machine to clean the filter screen. This simple and convenient operation greatly reduces the difficulty of use. Furthermore, when too much lint accumulates in the dust collection box, users only need to periodically empty the dust collection box, resulting in shorter maintenance time and simpler maintenance operations. Attached Figure Description

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the exhaust device of the washer-dryer combo described in the embodiments of this application;

[0023] Figure 2 This is an exploded schematic diagram of the exhaust device of the washer-dryer combo described in the embodiments of this application;

[0024] Figure 3 This is one of the structural schematic diagrams of the filter section of the exhaust device of the washer-dryer combo described in the embodiments of this application;

[0025] Figure 4 for Figure 3 A structural schematic diagram from another perspective of the structure shown;

[0026] Figure 5 for Figure 3 An exploded view of the structure shown.

[0027] Figure 6 for Figure 3 A cross-sectional view of the structure shown;

[0028] Figure 7 This is a schematic diagram of the filter screen inside the ventilation duct described in this application embodiment in a laid-down state;

[0029] Figure 8 This is a schematic diagram of the electrostatic dust collection component described in the embodiment of this application in the dust collection state;

[0030] Figure 9 This is a schematic diagram of the electrostatic dust collection assembly described in the embodiment of this application in the dust discharge state;

[0031] Figure 10 for Figure 9 A cross-sectional view of the structure shown;

[0032] Figure 11 This is a schematic diagram of the dust collection box described in the embodiments of this application;

[0033] Figure 12 This is an exploded view of the dust collection box described in an embodiment of this application.

[0034] In the picture:

[0035] 1. Ventilation duct; 11. Dust outlet; 12. Baffle frame; 2. Filter screen; 21. Filter screen body; 22. First rotating shaft; 3. First drive assembly; 31. Motor; 32. Worm gear; 33. First gear; 4. Dust collection box; 41. Mounting shell; 42. Box body; 421. Handle; 5. Electrostatic dust collection assembly; 51. Mounting frame; 52. Electrostatic adsorption plate; 521. Adsorption plate body; 522. Second rotating shaft; 53. Baffle bar; 54. Second drive assembly; 541. Linear actuator; 542. Rack; 543. Second gear; 6. Air supply duct; 7. Air exhaust duct. Detailed Implementation

[0036] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In modern family life, washer-dryer combos are a convenient household appliance that combines washing and drying functions, greatly simplifying daily clothing handling. During the drying process, to prevent lint and other impurities from being expelled with the air, a filter is usually installed in the drying exhaust duct. However, after prolonged use, a large amount of lint gradually accumulates on the filter. As the lint accumulates, the filter's permeability is severely affected, leading to poor ventilation. This not only reduces drying efficiency but may also adversely affect the normal operation of the machine, even increasing energy consumption and shortening the equipment's lifespan.

[0040] What's even more problematic is that most washer-dryer combos on the market require manual operation to clean the filter. Users must disassemble the washing machine to access and remove the filter for cleaning. This process is not only tedious and complicated, requiring certain technical skills and tools, but also poses certain safety hazards, increasing users' maintenance costs and burden, and greatly affecting the user experience.

[0041] To overcome the above technical problems, such as Figure 1-12 As shown, this embodiment provides an exhaust device for a washer-dryer combo, including:

[0042] Ventilation duct 1 has a ventilation cavity inside, and a dust discharge port 11 is provided at the bottom of the ventilation duct 1;

[0043] Filter 2 is rotatably installed inside the ventilation cavity;

[0044] The first drive component 3 is connected to the filter screen 2 for driving the filter screen 2 to flip, so that the filter screen 2 is upright or laid down near the dust outlet 11. When the filter screen 2 is upright, it can intercept cotton fibers in the air passing through the ventilation cavity.

[0045] The dust collection box 4 includes a mounting shell 41 and a pull-out box body 42 installed on the mounting shell 41. The mounting shell 41 is installed below the ventilation pipe 1 and aligned with the dust discharge port 11. When the filter screen 2 is laid down, the box body 42 can collect the cotton wool that falls from the filter screen 2.

[0046] In practical applications, the exhaust device of the washer-dryer combo in this embodiment also includes an air supply pipe 6 and an exhaust pipe 7. One end of the air supply pipe 6 is connected to the air outlet of the washing drum, and the other end is connected to the air inlet of the ventilation pipe 1. One end of the exhaust pipe 7 is connected to the exhaust end of the ventilation pipe 1, and the other end is used to exhaust air into the environment.

[0047] When filter 2 is erected in the ventilation cavity (i.e. Figure 4(As shown in the diagram), it can intercept lint in the air passing through the ventilation cavity; when it is necessary to clean the filter screen 2, the first drive component 3 can automatically drive the filter screen 2 to rotate and fall down (i.e., Figure 6 (As shown in the figure) When the filter screen 2 is laid down, the windward side faces down, and the cotton wool intercepted on the windward side can automatically fall downward under the action of gravity. The fallen cotton wool falls into the dust collection box 4 through the dust discharge port 11 and is collected. After cleaning is completed, the first drive component 3 drives the filter screen 2 to rotate in the opposite direction to reset.

[0048] Traditional washer-dryer combos require manual disassembly of parts of the washing machine to clean the filter, a tedious and complex process. In contrast, this embodiment uses a first drive component 3 to flip the filter screen 2. When the filter screen 2 is tilted, lint automatically falls into the dust collection box 4. Users simply need to periodically pull out and clean the dust collection box 4, eliminating the need to disassemble the washing machine. This simple and convenient operation significantly reduces the difficulty of use. Furthermore, when too much lint accumulates in the dust collection box 4, users only need to periodically empty the box, reducing maintenance time and simplifying the overall maintenance process.

[0049] This embodiment achieves automatic cleaning of the filter screen 2 without the need for professional technicians and tools to disassemble, clean, and install it. This reduces the risk of equipment damage caused by improper manual operation, thereby reducing maintenance costs and equipment failure rate, and indirectly reducing the user's maintenance costs.

[0050] In the control system of the washer-dryer combo, an automatic timed cleaning program for filter 2 can be set. By promptly and effectively cleaning the lint on filter 2, problems such as poor ventilation caused by filter 2 blockage are avoided. This reduces additional energy consumption and mechanical wear caused by excessive ventilation resistance during operation, helping to extend the overall service life of the washer-dryer combo. Timely cleaning of filter 2 can effectively intercept lint in the air, preventing it from affecting the smooth flow of the ventilation system, thereby improving drying efficiency and reducing drying time.

[0051] In one embodiment, the filter screen 2 includes a screen body 21 and a first rotating shaft 22 connected to the bottom side of the screen body 21. The first driving component 3 is connected to the first rotating shaft 22 to drive the filter screen 2 to flip.

[0052] By directly connecting the first drive assembly 3 to the first rotating shaft 22 of the filter screen 2, the transmission structure is simplified, intermediate transmission links are reduced, and transmission efficiency and reliability are improved. This direct transmission method can more precisely control the flipping action of the filter screen 2, ensuring that it can be accurately erected or laid down when needed. Connecting the first rotating shaft 22 to the bottom side of the screen body 21 makes the installation of the entire filter screen 2 and the layout of the drive assembly more compact and reasonable. When the filter screen 2 is laid down, it is closer to the bottom dust discharge port 11, which allows the cotton wool to fall into the dust discharge port 11 more accurately.

[0053] In one embodiment, reference is made to Figure 7 The first drive assembly 3 includes a motor 31, a worm gear 32 and a first gear 33. The worm gear 32 is connected to the motor 31, and the first gear 33 is connected to the first rotating shaft 22. The worm gear 32 meshes with the first gear 33, so that the motor 31 drives the filter screen 2 to flip.

[0054] In this embodiment, the transmission system, consisting of a motor 31, a worm gear 32, and a first gear 33, has a relatively mature and compact structure, providing a stable and reliable driving force for the flipping of the filter screen 2. The motor 31, as the power source, transmits power to the first rotating shaft 22 through the meshing of the worm gear 32 and the first gear 33, thereby driving the filter screen 2 to achieve a precise flipping action. Furthermore, the worm gear 32 and the first gear 33 employ a specific meshing method, possessing a self-locking function. When the motor 31 stops operating, this self-locking characteristic effectively prevents the filter screen 2 from rotating unexpectedly under gravity or other external forces, ensuring the stability of the filter screen 2 in both upright and laid-down states.

[0055] In one embodiment, reference is made to Figure 6 The inner wall of the ventilation cavity is provided with a baffle frame 12 located on the leeward side of the filter screen 2. When the filter screen 2 is upright, the periphery of the leeward side of the filter screen 2 abuts against the baffle frame 12.

[0056] A baffle frame 12 is installed on the inner wall of the ventilation cavity. When the filter screen 2 is upright, its leeward side abuts against the baffle frame 12, which can effectively prevent the filter screen 2 from shaking or shifting under the impact of airflow. This design provides additional support for the filter screen 2, making it more stable and reliable when intercepting impurities such as cotton wool, and improving the stability of the filtration effect.

[0057] In one embodiment, an electrostatic dust collection component 5 is also included, which is installed below the ventilation pipe 1 and aligned with the dust outlet 11. The dust collection box 4 is installed below the electrostatic dust collection component 5. When the filter screen 2 is laid down, the electrostatic dust collection component 5 can adsorb the cotton lint on the filter screen 2 when it is powered on. When the electrostatic dust collection component 5 is powered off, the cotton lint on its surface can automatically fall down into the box 42.

[0058] When filter 2 is laid down, some of the lint on it may not fall into dust collection box 4 easily under gravity. Therefore, an electrostatic dust collection component 5 is added. This component is installed below ventilation pipe 1 and aligned with dust outlet 11. Dust collection box 4 is installed below the component, forming a top-down collaborative working chain. When filter 2 is laid down, the electrostatic dust collection component 5 actively attracts the lint. Then, power is cut off, allowing the lint to fall automatically into dust collection box 4. The entire process requires no manual intervention, achieving automated cleaning. In this embodiment, the electrostatic dust collection component 5, when powered on, actively attracts the lint, quickly and effectively removing impurities from the surface of filter 2 and restoring its breathability. This ensures that filter 2 can function normally in the next drying process, intercepting lint in the air, maintaining good airflow, and thus improving drying efficiency.

[0059] Furthermore, when the electrostatic dust collection component 5 is powered off, it loses its adsorption force on the cotton fibers it has attracted. The cotton fibers will then automatically fall down into the box 42 under the action of gravity and be collected, allowing users to simply clean the cotton fibers in the box 42.

[0060] In one embodiment, combined with Figures 8-10 The electrostatic dust collection component 5 includes a mounting frame 51, a plurality of electrostatic adsorption plates 52, and a second driving component 54. The upper and lower sides of the mounting frame 51 are respectively connected to the ventilation pipe 1 and the mounting shell 41. The plurality of electrostatic adsorption plates 52 are horizontally arrayed and rotatably mounted in the mounting frame 51. The second driving component 54 is connected to all the electrostatic adsorption plates 52 to drive all the electrostatic adsorption plates 52 to rotate synchronously. When the electrostatic adsorption plates 52 are laid flat, they can approach the filter screen 2 and adsorb cotton wool. When the electrostatic adsorption plates 52 are tilted, the cotton wool on their surface can automatically fall downward into the box 42.

[0061] In operation, before the filter screen 2 is laid down, the electrostatic adsorption plate 52 is in a flat state, with the entire electrostatic adsorption plate 52 horizontally close to the filter screen 2. After the filter screen 2 is laid down, the electrostatic adsorption plate 52 is energized. The energized electrostatic adsorption plate 52 can provide uniform adsorption force on the entire horizontal surface, achieving effective adsorption of cotton fibers on the entire filter screen 2. When the filter screen 2 is reset, the electrostatic adsorption plate 52 is de-energized, and then the second drive component 54 drives the electrostatic adsorption plate 52 to flip to an inclined state. The cotton fibers that have lost electrostatic adsorption force will fall downward into the dust collection box 4 under their own gravity.

[0062] In the above implementation, when the filter screen 2 is laid down, the electrostatic adsorption plate 52 can be brought as close as possible to the filter screen 2. After the electrostatic adsorption plate 52 is energized, it provides uniform adsorption force on the entire horizontal plane, which can effectively cover the entire surface of the filter screen 2, ensuring that the cotton fibers in all areas of the filter screen 2 are adsorbed evenly and effectively, avoiding adsorption dead zones and improving the cotton fiber collection efficiency.

[0063] From the flat adsorption of the electrostatic adsorption plate 52 to the flipping and dropping of cotton lint when the power is off, the entire cleaning process is highly automated. Users do not need to perform any manual intervention and only need to clean the dust collection box 4 periodically. This automated cleaning process not only reduces the tedium of manual operation, but also reduces the risk of equipment failure caused by incomplete manual cleaning or forgetting to clean.

[0064] In one embodiment, the electrostatic adsorption plate 52 includes an adsorption plate body 521 and a second rotating shaft 522 fixedly connected. The second driving assembly 54 includes a rack 542, a second gear 543 and a linear actuator 541. One end of each second rotating shaft 522 is equipped with a second gear 543. The rack 542 meshes with all the second gears 543 simultaneously. The linear actuator 541 is connected to the rack 542 and drives the rack 542 to reciprocate linearly, thereby synchronously driving all the electrostatic adsorption plates 52 to rotate.

[0065] The second drive assembly 54 adopts a combination of rack 542, second gear 543 and linear driver 541. The linear driver 541 drives the rack 542 to reciprocate linearly, which in turn drives the second gear 543 of all electrostatic adsorption plates 52 to rotate synchronously, realizing the synchronous flipping of electrostatic adsorption plates 52. This transmission method has a compact structure and can provide a stable and reliable driving force, ensuring the consistency and synchronicity of the actions of all electrostatic adsorption plates 52.

[0066] In one embodiment, the linear actuator 541 is a resilient electromagnet.

[0067] The elastic telescopic electromagnet has a simple and compact structure, consisting of basic components such as an electromagnet and a spring. In the electrostatic dust collection component 5 of a washer-dryer combo, it can be easily installed in a limited space, and during operation, it achieves extension and retraction through the cooperation of electromagnetic force and spring force. It eliminates the need for complex mechanical structures, improves system reliability, and reduces potential failure points.

[0068] In one embodiment, reference is made to Figure 10 The mounting frame 51 is provided with a baffle 53 located below the electrostatic adsorption plate 52. Each electrostatic adsorption plate 52 is provided with a baffle 53. When the electrostatic adsorption plate 52 is flipped to an inclined state, it can hit the baffle 53, causing the cotton wool on the surface of the electrostatic adsorption plate 52 to be shaken off.

[0069] In this embodiment, when the electrostatic adsorption plate 52 flips to an inclined state and strikes the baffle 53, it can generate instantaneous vibration. This vibration can effectively overcome the adhesion between the cotton and the surface of the adsorption plate, causing the cotton to quickly detach from the surface of the adsorption plate and fall into the dust collection box 4. This ensures that the electrostatic adsorption plate 52 can restore good adsorption performance after each cleaning, providing efficient adsorption capacity for the next drying process, thereby improving the overall drying efficiency.

[0070] In this embodiment, the baffle 53 provides a limit and support point for the flipping of the electrostatic adsorption plate 52. When the electrostatic adsorption plate 52 is flipped to an inclined state, the action of impacting the baffle 53 not only helps to shake off the cotton lint, but also ensures that the angle of the adsorption plate flipping is accurate and consistent, avoiding structural interference or damage caused by excessive flipping, thus improving the reliability and stability of the entire electrostatic dust collection assembly 5. By using this simple mechanical structure of the baffle 53 to shake off the cotton lint, there is no need to add a complex drive device or control logic, making the structure of the entire exhaust device simpler and clearer, reducing the complexity of design and manufacturing, and also facilitating later maintenance and repair.

[0071] In actual operation, the second drive component 54 can be used to control the electrostatic adsorption plate 52 to repeatedly strike the stop bar, causing vibration and effectively shaking off the cotton lint.

[0072] In one embodiment, a groove is provided on one side of the box body 42, and a flip-out handle 421 is installed in the groove. The handle 421 can be stored in the groove or extend out of the groove by flipping it.

[0073] The flip-out handle 421 extends into a groove, providing a comfortable grip for the user, facilitating easy application of force and effortless pulling of the box 42, reducing operational difficulty. When stored, the handle does not take up extra space, allowing the device to be placed in compact spaces, such as near a corner or furniture, maximizing space utilization.

[0074] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0075] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0077] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An air discharging device of a laundry washing and drying machine, characterized in that, The utility model provides a dust collecting device, which comprises: a ventilation pipe (1) internally formed with a ventilation cavity, the bottom of the ventilation pipe (1) being provided with a dust discharging port (11); a filter screen (2) rotatably installed in the ventilation cavity; a first driving assembly (3) in transmission connection with the filter screen (2) and used for driving the filter screen (2) to overturn, so that the filter screen (2) is erected or laid down close to the dust discharging port (11), and when the filter screen (2) is erected, the filter screen (2) can intercept lint in air passing through the ventilation cavity; a dust collecting box (4) comprising a mounting shell (41) and a box body (42) which is pullably installed in the mounting shell (41), the mounting shell (41) being installed below the ventilation pipe (1) and aligned with the dust discharging port (11), and when the filter screen (2) is laid down, the box body (42) can collect the lint falling from the filter screen (2).

2. The exhaust apparatus of the laundry washing and drying machine according to claim 1, wherein The filter screen (2) comprises a screen main body (21) and a first rotating shaft (22) connected to the bottom side of the screen main body (21), and the first driving assembly (3) is in transmission connection with the first rotating shaft (22) to drive the filter screen (2) to overturn.

3. The exhaust apparatus of the laundry washing and drying machine according to claim 2, wherein The first driving assembly (3) comprises a motor (31), a worm (32) and a first gear (33), the worm (32) being connected with the motor (31), the first gear (33) being connected with the first rotating shaft (22), and the worm (32) being engaged with the first gear (33) to realize driving of the filter screen (2) to overturn by the motor (31).

4. The exhaust apparatus of the laundry washing and drying machine according to claim 1, wherein An inner wall of the ventilation cavity is provided with a blocking frame (12) located at the leeward side of the filter screen (2), and when the filter screen (2) is erected, the periphery of the leeward surface of the filter screen (2) is in abutment with the blocking frame (12).

5. The laundry and drying machine exhaust apparatus according to claim 1, wherein Further comprising an electrostatic dust collecting assembly (5) installed below the ventilation pipe (1) and aligned with the dust discharging port (11), the dust collecting box (4) being installed below the electrostatic dust collecting assembly (5), and when the filter screen (2) is laid down, the electrostatic dust collecting assembly (5) can adsorb the lint on the filter screen (2) when powered on, and the lint on the surface of the electrostatic dust collecting assembly (5) can automatically fall downward into the box body (42) when the electrostatic dust collecting assembly (5) is powered off.

6. The laundry and drying machine exhaust apparatus according to claim 5, wherein The electrostatic dust collecting assembly (5) comprises a mounting frame (51), a plurality of electrostatic adsorption plates (52) and a second driving assembly (54), the upper and lower sides of the mounting frame (51) being connected with the ventilation pipe (1) and the mounting shell (41) respectively, the plurality of electrostatic adsorption plates (52) being horizontally arrayed and rotatably installed in the mounting frame (51), and the second driving assembly (54) being in transmission connection with all the electrostatic adsorption plates (52) to drive all the electrostatic adsorption plates (52) to overturn synchronously, and when the electrostatic adsorption plates (52) are laid flat, the electrostatic adsorption plates (52) can be close to the filter screen (2) and adsorb the lint, and when the electrostatic adsorption plates (52) are inclined, the lint on the surface of the electrostatic adsorption plates (52) can automatically fall downward into the box body (42).

7. The laundry and drying machine exhaust apparatus according to claim 6, wherein The electrostatic adsorption plate (52) comprises a fixedly connected adsorption plate body (521) and a second rotating shaft (522), the second driving assembly (54) comprises a rack (542), a second gear (543) and a linear driver (541), one end of each second rotating shaft (522) is provided with a second gear (543), the rack (542) is engaged with all the second gears (543) at the same time, the linear driver (541) is connected with the rack (542), the linear reciprocating movement of the rack (542) is driven by the linear driver (541), and synchronous driving of all the electrostatic adsorption plates (52) is realized.

8. The exhaust apparatus of the laundry washing and drying machine according to claim 7, wherein The linear driver (541) is an elastic telescopic electromagnet.

9. The laundry and drying machine exhaust apparatus according to claim 6, wherein, The mounting frame (51) is provided with a blocking rod (53) below the electrostatic adsorption plate (52), each electrostatic adsorption plate (52) is provided with a blocking rod (53), the electrostatic adsorption plate (52) can hit the blocking rod (53) when being turned to an inclined state, so that the lint on the surface of the electrostatic adsorption plate (52) is shaken off.

10. The laundry and drying machine exhaust apparatus according to claim 1, wherein, One side of the box body (42) is provided with a recess, a reversible pull handle (421) is installed in the recess, and the pull handle (421) can be accommodated in the recess or extended out of the recess by turning over.

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