Air duct lint filtering device and washing and drying machine

Abstract

The present invention discloses an air duct lint filter device and a washing and drying machine. The air duct lint filter device comprises: a lint filter body, the lint filter body being provided with an air inlet and an air outlet, and a drain outlet being provided at the bottom of the lint filter body; and a siphon pipe, the siphon pipe having a first pipe section and a second pipe section connected together, the first pipe section extending upward, and the second pipe section extending downward from the upper end of the first pipe section; wherein the inlet of the first pipe section is connected to the drain outlet. Drainage is achieved through a siphon, and the water level is automatically controlled by the siphon channel, thereby avoiding overflow caused by excessive water level, thereby improving the reliability of the washing and drying machine.

Description

Technical Field

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

[0002] Washing machines are a common household appliance in people's daily lives. With the continuous development of technology, washing machines with drying functions are becoming more and more popular. Washing machines with drying functions can not only wash clothes normally, but also dry the washed and spun clothes.

[0003] Chinese patent application No. 201811058551.8 discloses an air duct filtering device and a washing and drying machine, in which a drying heat source is provided. During the drying process, the hot air generated by the drying heat source is blown into the inner drum of the washing machine through the fan to dry the clothes in the inner drum; and the air flow output from the inner drum enters the water storage pipe for condensation and removal of lint. In order to drain water and control the water level, it is necessary to set a water level control mechanism and a drain valve on the water storage pipe. When the water level control mechanism detects that the water level exceeds the set value, it triggers the drain valve to open for drainage. However, in actual use, there is a situation where the water level control mechanism fails, resulting in excessive water in the water storage pipe. The water in the water storage pipe overflows into the inside of the washing and drying machine, causing the washing and drying machine to malfunction.

[0004] In view of this, how to design a technology for automatically controlling the water level to improve the reliability of the washing and drying machine is a technical problem to be solved by the present invention. Summary of the Invention

[0005] The present invention provides an air duct lint filtering device and a washing and drying machine, which realize drainage by siphoning and automatically control the water level using the siphon channel, thereby avoiding overflow due to excessive water level and improving the reliability of the washing and drying machine.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides an air duct lint filtering device, comprising:

[0008] A lint filter body is provided with an air inlet and an air outlet, and a drain outlet is also provided at the bottom of the lint filter body;

[0009] a siphon pipe having a first pipe section and a second pipe section connected together, wherein the first pipe section extends upward, and the second pipe section extends downward from an upper end portion of the first pipe section;

[0010] Wherein, the inlet of the first pipe section is connected to the drain outlet.

[0011] Furthermore, a water injection pipe is provided on the pipe wall of the first pipe section.

[0012] Furthermore, the water outlet direction of the water injection pipe is arranged upward.

[0013] Furthermore, the water outlet direction of the water injection pipe is toward the connection portion between the first pipe section and the second pipe section.

[0014] Furthermore, the lint filter body includes: an outer shell, which is provided with the air inlet, the air outlet and the drain outlet; a first baffle, which is arranged in the outer shell and extends from the upper part of the outer shell to the lower part; a second baffle, which is arranged in the outer shell and extends from the lower part of the outer shell to the upper part; wherein, along the air flow direction inside the outer shell, the lower end of the first baffle is located in front of the upper end of the second baffle; the air inlet and the air outlet are located on opposite sides of the first baffle, and an air inlet area is formed between the first baffle, the second baffle and the air inlet, and an air outlet area is formed between the first baffle, the second baffle and the air outlet.

[0015] Furthermore, a partition is provided in the shell, which divides the interior of the shell into two independent first and second cavities. The first baffle and the second baffle are arranged in the first cavity, the air inlet and the air outlet are connected to the first cavity, and a water outlet is provided at the bottom of the partition, which connects the first cavity and the second cavity. An overflow port is also provided on the shell, and the overflow port is connected to the second cavity.

[0016] Furthermore, a vent is provided on the upper portion of the partition, and the vent connects the first cavity and the second cavity.

[0017] Furthermore, the air outlet is located at the upper part of the shell, and at least one water baffle is provided below the air outlet.

[0018] Furthermore, the water retaining plates are provided in plurality, and the plurality of water retaining plates are spaced apart from each other and arranged in a transverse staggered manner.

[0019] In another aspect, the present invention also provides a washing and drying machine, comprising an inner drum and a drying module, the drying module having an air blowing port and an air suction port, the air blowing port being connected to the inner drum, and also comprising the above-mentioned air duct lint filtering device; the air inlet of the air duct lint filtering device is connected to the inner drum, and the air outlet of the air duct lint filtering device is connected to the air suction port of the drying module.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are: by connecting a siphon pipe to the drain outlet of the lint filter body, the first pipe section of the siphon pipe extends upward, and the second pipe section extends downward, and the siphon pipe is connected to the drain outlet. Since the connection part of the first pipe section and the second pipe section is higher than the drain outlet, the water level in the lint filter body can be automatically controlled by the height of the connection part of the first pipe section and the second pipe section; at the same time, when drainage is required, the water in the lint filter body can be discharged through the drain outlet by siphoning, thereby eliminating the need to use an electromagnetic valve in conjunction with a liquid level detection mechanism to control the water level and drain water, avoiding overflow due to failure of the electromagnetic valve or the liquid level detection mechanism, and improving the reliability of the washing and drying machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 One of the structural diagrams of an embodiment of the present invention is a duct line debris filtering device;

[0023] Figure 2 for Figure 1 Middle AA section view;

[0024] Figure 3 This is a second structural diagram of the first embodiment of the air duct lint filtering device of the present invention;

[0025] Figure 4 for Figure 3 Middle BB section view;

[0026] Figure 5 An exploded view of an embodiment of the present invention of an air duct wire debris filtering device;

[0027] Figure 6 for Figure 1 Cross-sectional view of the middle siphon pipe;

[0028] Figure 7 This is a reference diagram of the air duct lint filtering device according to the present invention in the use state of the first embodiment;

[0029] Figure 8 This is a cross-sectional view of a second embodiment of the air duct lint filtering device of the present invention;

[0030] Figure 9 This is a cross-sectional view of the third embodiment of the air duct lint filtering device of the present invention. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Example 1, as Figure 1-Figure 7 As shown, this embodiment provides an air duct lint filter device, which includes a lint filter body. The lint filter body is provided with an air inlet 11 and an air outlet 12, and a water outlet 16 is provided at the bottom of the lint filter body. A flow path is formed within the lint filter body, and air contaminated with lint enters the lint filter body through the air inlet 11. The airflow, after washing away the lint using the water stored in the lint filter body, is then discharged through the air outlet 12. The specific embodiment of the lint filter body is not limited herein.

[0034] Specifically, the air duct lint filter device is installed on a washing and drying machine during actual use. The washing and drying machine is usually equipped with an inner drum 100 and a drying module 200, wherein the drying module 200 is used to transport dry air into the inner drum 100 and absorb the moist air in the inner drum 100 to achieve air circulation. The lint filter body is connected between the inner drum 100 and the drying module 200. The moist air in the inner drum 100 enters the lint filter body through the air inlet 11. After the lint removal process, it is output to the drying module 200 through the air outlet 12 for air drying and heating. The high-temperature dry air is then transported to the inner drum 100 to achieve the drying process of the clothes. As for the specific performance entity of the drying module 200, the drying structure in the washing and drying machine in conventional technology can be adopted, which is not limited or elaborated here.

[0035] In order to automatically control the water level of the lint filter body and drain water as needed, the air duct lint filter device also includes a siphon pipe 4. The siphon pipe 4 has a first pipe section 41 and a second pipe section 42 connected together. The first pipe section 41 extends upward, and the second pipe section 42 extends downward from the upper end of the first pipe section 41; wherein the inlet of the first pipe section 41 is connected to the drain outlet 16. Specifically, the first pipe section 41 is connected to the drain outlet 16, and the requirements of water level control and drainage are met through the siphon pipe 4. For automatic water level control, since the first pipe section 41 extends upward and the second pipe section 42 extends downward, the height of the connection between the first pipe section 41 and the second pipe section 42 is higher than the drain outlet 16. Furthermore, the height of the connection between the first pipe section 41 and the second pipe section 42 can be used to control the water level of the lint filter body accordingly.

[0036] In actual use, after a fixed amount of water is injected into the lint filter, as the clothes drying operation continues, water generated by condensation from the airflow accumulates within the lint filter, causing the water level within the lint filter to slowly rise. When the water level within the lint filter rises slightly above the junction of the first and second pipe sections 41 and 42, the liquid pressure automatically drains the water from the lint filter through the siphon pipe 4, thereby achieving automatic liquid level control.

[0037] Similarly, when the clothes drying operation is finished, the water in the lint filter body needs to be drained. At this time, it is only necessary to use the siphon pipe 4 to drain the water outwards, so that the water in the lint filter body can be quickly and efficiently extracted and drained under the action of the siphon. Among them, there are many ways to trigger the siphon pipe 4 to drain the water outwards. For example: a negative pressure device can be set at the water outlet of the siphon pipe 4, so that the water in the lint filter body is first sucked into the second pipe section through the negative pressure device during the discharge process, and then the negative pressure device is shut down and the water is automatically drained based on the principle of siphon; and the negative pressure device can use an exhaust fan or the like to form a negative pressure at the water outlet of the second pipe section 42, which is not limited or elaborated here. Alternatively, a large amount of water flow can be added to the lint filter body to make the water level in the lint filter body rise rapidly. When the connection between the first pipe section 41 and the second pipe section 42 of the siphon pipe 4 is full of water and the siphon effect is triggered, the water source is closed and the water in the lint filter body can be completely drained.

[0038] As a preferred embodiment, to facilitate the rapid drainage of water from the lint filter body through the siphon pipe 4, a water injection pipe 43 is provided on the wall of the first pipe section 41. Specifically, the water injection pipe 43 can inject water into the first pipe section 41, thereby forming an outward flow of water in the siphon pipe 4. Once the outward flow is formed in the siphon pipe 4, the water injection through the water injection pipe 43 can be suspended, and the water in the lint filter body can be pumped out and discharged through the siphon pipe 4 using the principle of siphoning.

[0039] In certain embodiments, in order to use a small amount of water to start the siphon pipe 4 to siphon water, the water outlet direction of the water injection pipe 43 is set upward. Specifically, along the extension direction of the first pipe section 41, the water injection pipe 43 ejects water upward, thereby forming flowing water in the second pipe section 42, so that the siphon pipe 4 can siphon water. Preferably, the water outlet direction of the water injection pipe 43 is toward the connection part of the first pipe section 41 and the second pipe section 42. Specifically, the water injected from the water injection pipe 43 into the first pipe section 41 is toward the connection part of the first pipe section 41 and the second pipe section 42. On the one hand, it can make the second pipe section 42 quickly filled with water to form a water outlet flow. On the other hand, during the normal siphon process, the water in the lint filter body will not accidentally flow into the water injection pipe 43, so as to ensure smooth drainage.

[0040] As a preferred embodiment, the housing 1 of the air duct lint filter device is further provided with a water inlet 15. Water can be added to the housing 1 through the water inlet 15, and the water can be drained out of the housing 1 to replace it with new water through the water outlet 16. The water inlet 15 can be filled with water by the water inlet mechanism of the washing and drying machine.

[0041] Embodiment 2, based on the above technical solution, optionally, in order to more effectively improve the efficiency and effect of lint removal, the lint filter body can adopt the following structural form, specifically: the lint filter body includes a shell 1, a first baffle 2 and a second baffle 3. The shell 1 is provided with an air inlet 11, an air outlet 12 and a drain 16. The first baffle 2 is arranged in the shell 1 and extends from the upper side of the shell 1 to the lower side, and the second baffle 3 is arranged in the shell 1 and extends from the lower side of the shell 1 to the upper side. In addition, along the direction of the air flow inside the shell 1, the lower end of the first baffle 2 is located in front of the upper end of the second baffle 3, and an air inlet area 101 is formed between the first baffle 2, the second baffle 3 and the air inlet 11, and an air outlet area 102 is formed between the first baffle 2, the second baffle 3 and the air outlet 12.

[0042] During the drying process, a certain amount of water needs to be injected into the outer shell 1 first so as to use the water in the outer shell 1 to clean the lint. In particular, when the drying module 200 is not started, the water level in the outer shell 1 needs to submerge the lower end of the first baffle 2. In this way, the air inlet area 101 and the air outlet area 102 can be isolated by the first baffle 2 and the water in the outer shell 1. After the drying module 200 is started, the airflow carrying lint output from the inner drum 100 passes through the air inlet 11 and enters the air inlet area 101 in the outer shell 1. Since the air inlet area 101 and the air outlet area 102 are separated by the first baffle 2 inserted in the water, under the action of air pressure, the water in the air inlet area 101 is pressed into the air outlet area 102, and finally, the airflow enters between the first baffle 2 and the second baffle 3 through the bottom of the first baffle 2.

[0043] As the airflow passes over the surface of the first baffle 2, it fully contacts the water layer on the surface of the first baffle 2, effectively absorbing the lint. Simultaneously, the airflow impinges upon the surface of the second baffle 3, creating a large spray of water above the second baffle 3. The airflow between the first and second baffles 2, 3 is further cleansed by the spray, effectively removing lint from the airflow.

[0044] In order to ensure that the lower end of the first baffle 2 can be submerged below the water surface, the lower edge height of the first baffle 2 should be set lower than the height of the connection portion between the first pipe section 41 and the second pipe section 42 .

[0045] In addition, in order to allow the water injected into the outer shell 1 through the water inlet 15 to flow into the air outlet area 102 from the air inlet area 101 in a timely manner, this embodiment preferably designs a gap between the lower end of the second baffle 3 and the bottom surface of the outer shell 1. For example, the second baffle 3 can be fixed on the front side panel and the rear side panel of the outer shell 1 to meet the design requirements of the second baffle 3 being installed and fixed in the outer shell 1 and forming a gap with the bottom surface of the outer shell 1.

[0046] Preferably, along the lateral projection direction of the housing 1, the lower end of the first baffle 2 and the upper end of the second baffle 3 can form a projection overlap area. Specifically, the lower end of the first baffle 2 is lower than the upper end of the second baffle 3 in height, so that the lower end of the first baffle 2 and the upper end of the second baffle 3 have a projection overlap area in the lateral projection direction, so that the airflow can be further guided by the second baffle 3 after bypassing the bottom of the first baffle 2. In this way, it is ensured that the airflow can flow between the first baffle 2 and the second baffle 3 and enter the air outlet area 102. The airflow flowing between the first baffle 2 and the second baffle 3, on the one hand, can make the airflow fully contact with the water layer on the surface of the first baffle 2 and the second baffle 3 to remove the wire chips, and on the other hand, it can also ensure that the airflow can fully contact with the water splashes generated by the second baffle 3 during the rising process, so as to effectively improve the efficiency of wire chip removal.

[0047] In certain embodiments, a partition 13 may be further provided within the housing 1. The partition 13 divides the interior of the housing 1 into two independent first and second cavities, a and b. The first cavity a is provided with a first baffle 2 and a second baffle 3. The air inlet 11 and the air outlet 12 communicate with the first cavity a. A water outlet 131 is provided at the bottom of the partition 13, communicating with the first and second cavities, a and b. Specifically, to reduce overflow caused by water surface fluctuations during lint removal, the partition 13 divides the interior of the housing 1 into two independent first and second cavities, a and b. The water outlet 131 provided at the bottom of the partition 13 ensures that the water levels in the first and second cavities, a and b, remain consistent when the clothes drying module 200 is not operating.

[0048] To prevent the water levels in the first cavity a and the second cavity b from varying due to unequal air pressure, a vent 132 is provided on the upper portion of the partition 13 in this embodiment. The vent 132 connects the first cavity a and the second cavity b. Specifically, the vent 132 is provided at the top of the partition 13, providing air communication between the first cavity a and the second cavity b. This ensures that the water levels in the first cavity a and the second cavity b remain consistent when the clothes drying module 200 is operating.

[0049] To better optimize the lint removal effect, in this embodiment, the lower end of the first baffle 2 is preferably bent toward the second baffle 3. Specifically, after being guided by the lower end of the first baffle 2, the airflow flows toward the second baffle 3. On the one hand, the airflow can be further guided through the second baffle 3 to remove lint. On the other hand, while flowing upward along the second baffle 3, the airflow can further impact the water layer above, forming a larger range of water splashes.

[0050] Similarly, the upper end of the second baffle 3 is bent toward the first baffle 2. Specifically, the airflow guided by the second baffle 3 is guided by its upper end and then flows toward the first baffle 2. In this way, the airflow can be directed back to the first baffle 2 to fully utilize the water layer on the surface of the first baffle 2 to remove lint.

[0051] A more preferred solution is that the lower end of the first baffle 2 and the upper end of the second baffle 3 are both bent.

[0052] In some embodiments, an air guide portion 21 extending toward the air outlet area 102 may be further provided on the upper portion of the first baffle 2. The air guide portion 21 is located above the second baffle 3 and further away from the air inlet area 101 relative to the second baffle 3. Specifically, in the process of the airflow passing over the lower end portion of the first baffle 2 and continuing to flow upward along the first baffle 2, the airflow will be shielded and guided by the upper air guide portion 21 to extend the residence time of the airflow in the housing 1, thereby achieving full contact between the airflow and the water for the lint removal operation, thereby effectively improving the efficiency of the lint removal. The air guide portion 21 is preferably designed to extend downwardly and obliquely, so that the airflow can be guided by the air guide portion 21 to flow toward the water surface at the bottom again, so that the airflow hits the water surface behind the second baffle 3 again for lint removal.

[0053] In addition, there are many forms for the specific structure of the first baffle 2 and the second baffle 3. For example, the first baffle 2, the second baffle 3 and the guide portion 21 can all be designed to be arc-shaped structures (such as Figure 4 As shown), or are designed to be bent arc structures (such as Figure 9 As shown); in this way, the airflow flowing between the lower end of the first baffle 2 and the upper end of the second baffle 3 can form a vortex to fully contact the water and improve the effect of removing the thread chips; at the same time, the guide part 21 located above the second baffle 3 can form a vortex airflow by guiding the airflow to further optimize the effect of removing the thread chips. Figure 8 As shown, the first baffle 2 and the second baffle 3 are also configured as folded edge structures to achieve blocking and guiding of the airflow.

[0054] like Figure 9 As shown, to reduce the amount of water mist overflowing from the air outlet 12, at least one water baffle 17 is preferably provided within the housing 1, below the air outlet 12. If multiple water baffles 17 are provided, they should be arranged vertically and horizontally staggered. Specifically, the water baffle 17 is located below the air outlet 12. The water baffle 17 blocks the rising airflow during its passage, thereby blocking water mist and entrained water droplets in the airflow, thereby reducing the amount of water mist entering the drying module 200 and improving drying efficiency.

[0055] In certain embodiments, to further improve operational safety and reliability and prevent the water level in the housing 1 from becoming excessively high due to blockage in the siphon conduit 4, an overflow port 14 may be provided on the housing 1. The overflow port 14 communicates with the second chamber b. By providing the overflow port 14 on the housing 1, the overflow port further ensures that the water level in the housing 1 does not become excessively high. Typically, the water level control height of the overflow port 14 is higher than the water level control height of the siphon conduit 4.

[0056] Furthermore, regarding the overflow port 14, during the lint removal process, the water flow impacting the water in the housing 1 generates a large amount of foam. To prevent the foam from causing overflow problems, the overflow port 14 in this embodiment is designed to include a first sub-overflow port 141 and a second sub-overflow port 142 arranged in an upper and lower arrangement. The first sub-overflow port 141 is located at the top for ventilation and foam discharge, while the second sub-overflow port 142 is located at the bottom for water level regulation. The lower end of the first baffle 2 needs to be lower than the second sub-overflow port 142, while the upper end of the second baffle 3 needs to be higher than the second sub-overflow port 142.

[0057] By configuring a first baffle and a second baffle in the shell, and dividing the interior of the shell into an air inlet area and an air outlet area by the first baffle and the second baffle, during use, water is added to the shell and the lower end of the first baffle is immersed in water, and the air flow introduced from the air inlet is mixed with lint and enters the air inlet area. Since the lower end of the first baffle is immersed in water and the air inlet area and the air outlet area are separated, the wind pressure in the air inlet area gradually increases, causing the water on the air inlet area side to flow to the air outlet area, and finally causing the air flow to enter the area between the first baffle and the second baffle from the bottom along the first baffle; the air flow fully contacts the water film on the surface of the first baffle to effectively clean the lint in the air flow; at the same time, the water in the shell is driven by the air flow to impact the second baffle to form a number of water droplets, which can more quickly and efficiently absorb the lint in the air flow, so as to further improve the efficiency and effect of lint removal, so that the drying effect of the washing and drying machine is better, so as to improve the user experience of the washing and drying machine.

[0058] Example 3, as Figure 7As shown, this embodiment provides a washing and drying machine, comprising an inner drum 100, a drying module 200, and the air duct lint filter device described in Example 1. The drying module 200 has an air blowing port and an air suction port, the air blowing port being connected to the inner drum 100, an air inlet 11 of the air duct lint filter device being connected to the inner drum 100, and an air outlet 12 of the air duct lint filter device being connected to the air suction port of the drying module 200. When the washer-dryer is in the drying mode, the drying module 200 draws moist air from the inner drum 100, which first enters the duct lint filter through the air inlet 11 to remove lint from the airflow. The moist airflow, free of lint, then enters the air intake of the drying module 200 through the air outlet 12 of the duct lint filter, and then flows into the drying module 200 to form a high-temperature, dry airflow. The airflow then flows into the inner drum 100 through the air outlet of the drying module 200 to dry the clothes in the inner drum 100, thus completing one cycle of the airflow. The airflow is controlled to circulate repeatedly between the inner drum 100, the duct lint filter, and the drying module 200 until the clothes in the inner drum 100 are dry. In this way, the washer-dryer of this embodiment simultaneously achieves the function of removing lint during the drying process.

[0059] At the same time, in order to ensure smooth drainage of overflow water from the siphon pipe 4, the water outlet of the siphon pipe 4 can be connected to the drain pipe of the washing and drying machine itself, so as to discharge the overflow water to the outside of the washing and drying machine.

[0060] In this embodiment, the specific structural form of the washing and drying machine is not limited here. As for the air duct lint filtering device, it can be built into the shell of the washing and drying machine to maintain the overall aesthetics of the washing and drying machine.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An air duct lint filtering device, characterized in that: include: A lint filter body is provided with an air inlet and an air outlet, and a drain outlet is also provided at the bottom of the lint filter body; a siphon pipe having a first pipe section and a second pipe section connected together, wherein the first pipe section extends upward, and the second pipe section extends downward from an upper end portion of the first pipe section; Wherein, the inlet of the first pipe section is connected to the drain outlet; The lint filter body comprises: a housing, wherein the housing is provided with the air inlet, the air outlet, and the drain outlet; a first baffle, the first baffle being disposed in the housing and extending downward from an upper portion of the housing; a second baffle disposed in the housing and extending upward from a lower portion of the housing; Wherein, along the airflow direction inside the housing, the lower end of the first baffle is located in front of the upper end of the second baffle; the air inlet and the air outlet are located on opposite sides of the first baffle, and an air inlet area is formed between the first baffle, the second baffle, and the air inlet, and an air outlet area is formed between the first baffle, the second baffle, and the air outlet; An air guide portion extending toward the air outlet area is provided on the upper portion of the first baffle, and the air guide portion is located above the second baffle; The first baffle, the second baffle and the air guide are all designed to be arc-shaped structures, the lint filter body is configured so that the airflow flowing between the lower end of the first baffle and the upper end of the second baffle can form a vortex, and the outer shell is configured so that the water level in the outer shell submerges the lower end of the first baffle.

2. The air duct lint filtering device according to claim 1, characterized in that: A water injection pipe is also provided on the pipe wall of the first pipe section.

3. The air duct lint filtering device according to claim 2, characterized in that: The water outlet direction of the water injection pipe is arranged upward.

4. The air duct lint filtering device according to claim 3, characterized in that: The water outlet direction of the water injection pipe is toward the connection position of the first pipe section and the second pipe section.

5. The air duct lint filtering device according to claim 1, characterized in that: A partition is also provided in the shell, which divides the interior of the shell into two independent first cavities and second cavities. The first baffle and the second baffle are arranged in the first cavity, and the air inlet and the air outlet are connected to the first cavity. A water outlet is provided at the bottom of the partition, and the water outlet connects the first cavity and the second cavity. An overflow port is also provided on the shell, and the overflow port is connected to the second cavity.

6. The air duct lint filtering device according to claim 5, characterized in that: A vent is provided on the upper portion of the partition, and the vent is connected to the first cavity and the second cavity.

7. The air duct lint filtering device according to claim 1, characterized in that: The air outlet is located at the upper part of the shell, and at least one water baffle is provided below the air outlet.

8. The air duct lint filtering device according to claim 7, characterized in that: There are multiple water retaining plates, which are spaced apart vertically and arranged in a transverse staggered manner.

9. A washing and drying machine, comprising an inner drum and a drying module, wherein the drying module has an air blowing port and an air suction port, wherein the air blowing port is connected to the inner drum, wherein: It also includes an air duct lint filtering device as described in any one of claims 1 to 8; the air inlet of the air duct lint filtering device is connected to the inner cylinder, and the air outlet of the air duct lint filtering device is connected to the air intake of the drying module.

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