Lint separating device and control method of a laundry dryer having a lint separating device

Abstract

The application discloses a lint separating device and a control method of a clothes dryer with the lint separating device. The lint separating device is arranged in a wind channel. The wind channel is provided with an air inlet and an air outlet at two ends respectively. The lint separating device comprises a filtering assembly and a cleaning part. The filtering assembly comprises a first filtering part and a second filtering part. The first filtering part is arranged in a funnel shape. The first filtering part is provided with a discharge port at a base. The second filtering part is arranged to communicate the discharge port with the outside of the wind channel. The first filtering part or the second filtering part is provided with a mesh structure. The mesh structure comprises at least two layers of filtering screens. The adjacent two layers of filtering screens are spaced apart to form a gap. The cleaning part is arranged at one end of the mesh structure close to the air inlet of the wind channel. The cleaning part is arranged to provide flushing gas into the gap. The lint separating device is further provided with a detection part. The computer board of the clothes dryer is arranged to detect the wind resistance or the humidity parameter of the mesh structure, to judge the attachment of the lint, and to clean the lint. The lint attached to the mesh structure is automatically cleaned.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of clothes dryers, in particular to a lint separation device and a control method of a clothes dryer with the lint separation device. BACKGROUND

[0002] During the operation of the clothes dryer, lint and fluff on the clothes inevitably flow with the drying air and are blocked by the lint filter device and remain on the lint filter device. The lint and fluff accumulate on the lint filter device with the use of the clothes dryer, which blocks the flow of the drying air, reduces the drying efficiency of the clothes dryer, and deteriorates the drying effect.

[0003] In order to solve this problem, a lint filter device is disclosed in Chinese patent application No. CN201210575631.7, which includes a first lint filter layer, a second lint filter layer, and a third lint filter layer. The first lint filter layer and the second lint filter layer are installed below the door body of the front air duct at the air outlet of the dryer drum, and the third lint filter layer is arranged in the internal air path of the dryer. The lint is filtered and collected through multiple filter layers, and the filter device is removed for cleaning. Although the above-mentioned scheme achieves the filtering and collection of lint, the user needs to frequently disassemble and clean the filter screen, which is relatively complex and reduces the user experience.

[0004] Chinese patent application No. CN202110297801.9 discloses a filtering mechanism and a clothes dryer, which includes a filter box arranged in an air duct. The filter box separates the air duct into a turbid air section and a clean air section. The mechanism further includes a fan, a collection box, a first filter screen, and a closure plate. The closure plate selectively closes the collection box and the air duct. The fan changes the direction of the circulating air in the air duct, which collects the filtered lint in the filter box into the collection box. The above-mentioned scheme realizes the automatic cleaning of lint, reduces the frequency of manual cleaning by the user, and improves the user experience. However, in the above-mentioned scheme, the cleaning program can only be executed after the drying is completed. If the cleaning program is executed during the drying process, the closure plate will block the circulating air, which will interrupt the drying program. In addition, the circulating air cannot return to the air duct after the lint is sent into the collection box, which causes the waste of heat.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The purpose of the present application is to provide a lint separation device that addresses the problems in the prior art. The lint separation device is arranged in the air duct and includes a filter part and a guide channel for discharging the lint filtered by the filter part to the outside of the air duct. The lint separation device realizes the automatic cleaning of the filter part and improves the user experience.

[0007] Another object of the present application is to provide a control method for a clothes dryer with lint separation device, which can solve the above problems by detecting the air resistance of the filter part, judging the attachment of lint on the detection part according to the detection result, executing a cleaning program when it is judged that there is a large amount of lint, and discharging the lint from the guide channel, thereby reducing the influence of the circulating air discharge on the drying efficiency.

[0008] To achieve the above object, the present application provides a lint separation device, which is arranged in a wind channel, and the wind channel has an air inlet and an air outlet at two ends respectively, and the lint separation device comprises,

[0009] a filter assembly, which is in communication with the outside of the wind channel, has a mesh structure, and is used for filtering and guiding the lint;

[0010] a cleaning part, which is arranged on the mesh structure of the filter assembly, and is used for cleaning the lint attached to the mesh structure.

[0011] In the above scheme, the filter assembly filters the lint in the circulating air and then guides the lint to the outside of the wind channel, thereby achieving the automatic cleaning of the filter part. However, the lint is inevitably attached to the mesh structure in the above process, which affects the circulation efficiency of the circulating air. The cleaning part is used for cleaning the lint attached to the mesh structure, thereby achieving the cleaning of the lint attached to the mesh structure.

[0012] Further, the wind channel wall of the wind channel is provided with a discharge port, and the filter assembly comprises,

[0013] a first filter part, which partially covers the cross section of the wind channel;

[0014] a second filter part, which is arranged at the rear of the first filter part in the air outlet direction, and which is used for connecting the part of the cross section of the wind channel which is not covered by the first filter part with the discharge port.

[0015] Further, the second filter part has a mesh structure, and the cleaning part is arranged on the second filter part.

[0016] Preferably, the mesh structure is located at one end of the second filter part which is close to the first filter part.

[0017] In the above scheme, the circulating air enters the second filter part under the guidance of the first filter part, the lint is discharged to the outside of the wind channel under the guidance of the second filter part, and the circulating air passes through the filter mesh and returns to the wind channel to continue the circulation, thereby reducing the influence on the circulation efficiency of the circulating air in the wind channel while discharging the lint by using the circulating air.

[0018] Further, the first filter part is a baffle, and the baffle has uniformly arranged through holes.

[0019] In the above scheme, in order to avoid the line debris separation device from having a greater impact on the circulation efficiency of the circulating air, a baffle capable of allowing the circulating air to pass through is arranged on the first filter part. Under the guidance of the first filter part, most of the circulating air enters the second filter part, but a small part of the circulating air directly passes through the first filter part to circulate, and a pressure difference is still formed on both sides of the second filter part, so that the circulating air entering the second filter part can smoothly pass through the second filter part to return to the air duct to continue to circulate, thereby reducing the impact of the line debris separation device on the circulation efficiency of the circulating air.

[0020] Further, the first filter part has a funnel-shaped structure covering the cross section of the air duct, and the second filter part communicates the opening at the base of the funnel-shaped structure with the discharge port.

[0021] In the above scheme, the first filter part is funnel-shaped, and the line debris can more smoothly enter the second filter part under the guidance of the first filter part.

[0022] As an alternative to the above scheme, the first filter part has a mesh structure, and the cleaning part is arranged on the first filter part.

[0023] In the above scheme, the first filter part has a mesh structure, and the first filter part is funnel-shaped, so that the line debris is not easily attached to the first filter part. Even if part of the line debris is attached to the first filter part, subsequent line debris is also not easily stacked to completely block the mesh structure, thereby reducing the impact of the line debris attachment on the circulation efficiency of the circulating air.

[0024] Further, the mesh structure includes at least two layers of filter screens, and a gap is formed between adjacent two layers of filter screens.

[0025] The cleaning part is a high-frequency pneumatic device arranged at one end of the mesh structure close to the air inlet of the air duct, and is used to provide flushing gas from the gap between adjacent two layers of filter screens to the other end of the mesh structure close to the air outlet of the air duct.

[0026] In the above scheme, the multiple layers of filter screens achieve sufficient filtration of the line debris, and the cleaning part provides flushing gas from the gap between adjacent two layers of filter screens to the other end of the mesh structure close to the air outlet of the air duct, which blows the line debris attached to the filter screens away while making the filter screens vibrate due to the change in pressure, thereby achieving sufficient cleaning of the filter screens.

[0027] Further, the line debris separation device further comprises,

[0028] The collecting part is arranged outside the air duct and communicates with the second filter part, and is used to collect the line debris.

[0029] The above solution collects lint that is discharged to the outside of the air duct through the collection section, avoiding pollution of the environment around the dryer. Users only need to clean the collection section regularly to clean the lint. At the same time, since the collection section is located outside the front air duct, the air duct does not limit the size of the collection section, allowing the collection section to have a larger capacity, reducing the frequency of cleaning for users and improving the user experience.

[0030] Furthermore, the collection section is located on the base plate of the clothing processing equipment.

[0031] The above solution, by placing the collection unit on the base plate of the garment processing equipment, makes it easier for users to remove the collection unit for cleaning, further improving the user experience.

[0032] The clothing processing equipment in the above scheme includes, but is not limited to, washing machines, dryers, and washer-dryer combos.

[0033] Furthermore, the wire chip separation device also includes,

[0034] The detection unit, located on the mesh structure, is used to detect the wind resistance or humidity at the mesh structure.

[0035] In the above scheme, when detecting wind resistance at the mesh structure, the detection unit is a wind resistance sensor; when detecting humidity at the mesh structure, the detection unit is a humidity sensor.

[0036] A second aspect of the present invention provides a control method for a clothes dryer having a lint separation device as described in the above-described scheme, comprising the following steps:

[0037] S1. During the drying process, the detection unit continuously detects the wind resistance or humidity at the mesh structure, obtains the first parameter, and sends the first parameter to the dryer's computer board.

[0038] S2. The computer board compares the first parameter with the preset first threshold. If the first parameter is greater than the first threshold, it controls the dryer to execute the cleaning program.

[0039] The first parameter includes a first wind resistance parameter and a first humidity parameter. When the first parameter is the first wind resistance parameter, the first threshold is the first wind resistance threshold. When the first parameter is the first humidity parameter, the first threshold is the first humidity threshold.

[0040] Furthermore, the cleanup procedure specifically includes:

[0041] The computer board controls the high-frequency pneumatic device to start, releasing flushing gas to clean the mesh structure.

[0042] Furthermore, dryer control methods also include,

[0043] S3, after the drying process is completed, the computer board controls the clothes dryer to execute the cleaning program again.

[0044] The above scheme makes the lint separation device always in a clean state by executing the cleaning program again after the drying process is completed, so that the long-time attachment of lint and sundries is avoided, and the circulation efficiency is reduced.

[0045] Further, the clothes dryer control method further comprises,

[0046] S4, in the cleaning program, the detection part continues to detect the wind resistance or humidity of the filtering part to obtain a second parameter, and the computer board compares the second parameter with a second threshold value, and when the second parameter is less than the second threshold value, the cleaning program is ended.

[0047] The second parameter comprises a second wind resistance parameter and a second humidity parameter, when the second parameter is the second wind resistance parameter, the second threshold value is a second wind resistance threshold value, when the second parameter is the second humidity parameter, the second threshold value is a second humidity threshold value, and the second threshold value is less than the first threshold value.

[0048] Or as an alternative to the above scheme, step S4 is that the computer board times the running time of the cleaning program, and when the running time reaches a preset time, the cleaning program is ended.

[0049] The above scheme judges the accumulation of lint on the mesh structure according to the parameter detected by the detection part, realizes the automatic cleaning of the lint, and improves the intelligent level of the clothes dryer.

[0050] Further, when the cleaning program is ended, the computer board controls the high-frequency pneumatic device to be closed.

[0051] The beneficial effects of the present application are:

[0052] The filter assembly filters out the lint in the circulating air and then guides it to the outside of the air duct, realizing automatic cleaning of the filter part; the filter assembly comprises a first filter part and a second filter part, the second filter part has a mesh structure, the circulating air enters the second filter part under the guidance of the first filter part, the lint is discharged to the outside of the air duct under the guidance of the second filter part, and the circulating air passes through the filter screen and returns to the air duct to continue circulation, avoiding the influence on the circulation efficiency of the circulating air and the waste of heat in the circulating air; the first filter part is provided with a through hole, during the drying process, due to the difference in air pressure on both sides of the second filter part, the circulating air can more smoothly pass through the mesh structure on the second filter part and return to the inside of the air duct, further reducing the influence of the lint separation device on the circulation efficiency of the circulating air; or the first filter part has a mesh structure and is arranged in the air duct in a funnel shape along the air outlet direction, the lint is not easy to adhere to the first filter part, which can realize sufficient cleaning of the lint while avoiding the influence on the circulation efficiency of the circulating air; the mesh structure comprises at least two layers of filter screens, a gap is formed between adjacent two layers of filter screens, the cleaning part provides flushing gas into the gap, and the filter screen vibrates due to the pressure difference while flushing the lint, realizing sufficient cleaning of the lint; the detection part detects the first parameter of the wind resistance or humidity at the mesh structure of the filter part, compares the first parameter with a preset first threshold value, and performs the cleaning program when the first parameter is greater than the first threshold value, realizing automatic cleaning of the filter part and improving the use experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 A structure diagram of the lint separation device.

[0054] Figure 2 A structure diagram of the lint separation device. Figure 1 A structure diagram of the lint separation device.

[0055] Figure 3 A structure diagram of the lint separation device. Figure 1 A structure diagram of the lint separation device.

[0056] Figure 4 A structure diagram of the lint separation device.

[0057] Figure 5 A structure diagram of the lint separation device. Figure 4 A structure diagram of the lint separation device.

[0058] Figure 6 A structure diagram of the lint separation device. Figure 4 A structure diagram of the lint separation device.

[0059] In the figure: 1, filter assembly; 11, first filter part; 12, second filter part; 2, mesh structure; 3, air duct; 31, opening; 4, cleaning part; 5, detection part. DETAILED DESCRIPTION

[0060] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings, and those skilled in the art can understand that the following embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0061] In the description of the present application, unless explicitly defined and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0063] Embodiment one

[0064] As an embodiment of the present application, the embodiment provides a lint separating device, which is arranged in a wind channel 3, both ends of the wind channel 3 are respectively provided with an air inlet and an air outlet, and the lint separating device comprises,

[0065] A filtering assembly 1, which is in communication with the outside of the wind channel 3, has a mesh structure 2, and is used for filtering and guiding lint;

[0066] A cleaning part 4, which is arranged on the mesh structure 2 of the filtering assembly 1, is used for cleaning the lint attached to the mesh structure 2.

[0067] In the embodiment, as shown in the drawings, the wind channel 3 is provided with an opening 31, and the filtering assembly 1 comprises, Figure 4

[0068] A first filtering part 11, which partially covers the cross section of the wind channel 3;

[0069] A second filtering part 12, which is arranged at the rear of the first filtering part 11 along the air outlet direction, and which communicates the part of the cross section of the wind channel 3 not covered by the first filtering part 11 with the discharge port;

[0070] The mesh structure 2 is located at one end of the second filtering part 12 close to the first filtering part 11.

[0071] ​In the above scheme, the circulating air enters the second filtering part 12 under the guidance of the first filtering part 11, the line scraps are discharged to the outside of the air duct 3 under the guidance of the second filtering part 12, and the circulating air passes through the filter screen to return to the air duct 3 to continue circulation, while the line scraps are discharged by using the circulating air, and the influence on the circulation efficiency of the circulating air in the air duct 3 is reduced.

[0072] At the same time, due to the pressure difference on both sides of the second filtering part 12, the circulating air entering the second filtering part 12 can pass through the second filtering part 12 to return to the air duct 3 to continue circulation under the influence of the pressure difference, the waste of heat in the circulating air is avoided, and the influence of the line scrap separation device on the circulation efficiency of the circulating air is reduced.

[0073] Further, the first filtering part 11 is a baffle with uniform through holes.

[0074] In the above scheme, a small part of the circulating air still passes through the first filtering part 11 to continue circulation, further reducing the influence of the line scrap separation device on the circulation efficiency of the circulating air.

[0075] Further, the cleaning part 4 is a high-frequency pneumatic device arranged on the mesh structure 2, and the mesh structure 2 is washed by the flushing gas to achieve sufficient cleaning of the attached line scraps.

[0076] Embodiment two

[0077] As another embodiment of the present application, the embodiment provides a line scrap separation device, which is arranged in the air duct 3, as shown in the figure, the filtering assembly 1 comprises, Figure 1

[0078] The first filtering part 11 partially covers the cross section of the air duct 3;

[0079] The second filtering part 12 is arranged at the rear of the first filtering part 11 along the air outlet direction, and connects the part of the cross section of the air duct 3 not covered by the first filtering part 11 with the discharge port.

[0080] In the embodiment, the first filtering part 11 has a mesh structure 2, which covers the cross section of the air duct 3 in a funnel structure, and has an opening 31 at the base of the funnel structure, and the second filtering part 12 connects the opening 31 with the discharge port.

[0081] In the above scheme, the first filtering part 11 filters the line scraps, reduces the influence on the circulation efficiency of the circulating air, and the first filtering part 11 is arranged in a funnel structure, so that the line scraps are not easily attached to the first filtering part 11, even if part of the line scraps are attached to the first filtering part 11, the subsequent line scraps are also not easily stacked to completely block the mesh structure 2, and the influence of the line scrap attachment on the circulation efficiency of the circulating air is reduced.

[0082] ​Further, the cleaning unit 4 is a high-frequency pneumatic device, which is arranged on the net structure 2 and can clean the thread scraps attached to the net structure 2 by flushing the net structure 2 with flushing gas.

[0083] Embodiment Three

[0084] As another embodiment of the present application, the embodiment provides a thread scrap separating device, which has the same structure as the thread scrap separating device in Embodiment One, and the difference is that, in the embodiment, as shown in Figure 5 the net structure 2 includes three layers of filter screens.

[0085] The above scheme can achieve sufficient filtration of thread scraps through the multiple layers of filter screens.

[0086] Further, the adjacent two layers of filter screens are arranged with a gap therebetween, and the cleaning unit 4 is arranged on the net structure 2 and provides flushing gas to the gap between the adjacent two layers of filter screens.

[0087] In the above scheme, the flow speed of the flushing gas is fast, and the vibration of the filter screens is caused by the difference in air pressure on both sides of the filter screens, so that the thread scraps attached to the filter screens can be fully cleaned.

[0088] Further, as shown in Figure 6 the cleaning unit 4 is arranged at one end of the net structure 2 close to the air inlet of the air duct 3 and provides flushing gas to the other end of the net structure 2 close to the air outlet of the air duct 3.

[0089] In the above scheme, the cleaning unit 4 flushes from one end of the net structure 2 close to the air inlet of the air duct 3 to the other end close to the air outlet, so that the thread scraps move in the same direction as the circulating air, thereby avoiding the scattering of the thread scraps and the reduction of the collection effect, and avoiding the conflict with the circulating air and the reduction of the circulation efficiency.

[0090] Further, the thread scrap separating device further includes,

[0091] a detection unit 5 arranged on the net structure 2 and used for detecting the air resistance or humidity at the net structure 2.

[0092] Embodiment Four

[0093] As another embodiment of the present application, the embodiment provides a thread scrap separating device, which has the same structure as the thread scrap separating device in Embodiment Two, and the difference is that, in the embodiment, as shown in Figure 2 and Figure 3 the net structure 2 includes three layers of filter screens, and the arrangement mode of the filter screens and the arrangement mode of the cleaning unit 4 are the same as those in Embodiment Three.

[0094] Embodiment Five

[0095] As another embodiment of the present application, the embodiment provides a lint separating device having the same structure as that of the fourth embodiment, and the difference is that, in the embodiment, the lint separating device further comprises a collecting part,

[0096] The collecting part is arranged outside the air duct and communicates with the guiding channel, and is used for collecting the lint.

[0097] The lint is collected by the collecting part, so that the lint does not pollute the environment around the clothes dryer, and compared with the filtering part, the collecting part has a larger capacity because it is arranged outside the front air duct, so that more lint can be accommodated, the cleaning frequency of the user is reduced, and the use experience of the user is improved.

[0098] Further, the collecting part is arranged on the bottom plate of the clothes treatment equipment.

[0099] The collecting part is arranged on the bottom plate of the clothes treatment equipment, so that the user can easily disassemble and clean the collecting part, and the use experience of the user is further improved.

[0100] The clothes treatment equipment in the above-mentioned solution includes but is not limited to a washing machine, a clothes dryer, and a washer-dryer.

[0101] Embodiment six

[0102] As another embodiment of the present application, the embodiment provides a lint separating device having the same structure as that of the fourth embodiment, and the difference is that, in the embodiment, the lint separating device further comprises a collecting part, and the collecting part is arranged at the same position as that in the fifth embodiment.

[0103] The present application further provides a control method of a clothes dryer with a lint separating device, and specifically comprises the following steps:

[0104] Embodiment seven

[0105] As another embodiment of the present application, the embodiment provides a control method of a clothes dryer with the lint separating device of the third embodiment, and in the embodiment, the detecting part is a wind resistance sensor, and the control method comprises the following steps:

[0106] S1, the detecting part continuously detects the wind resistance at the mesh structure in the clothes drying process to obtain a first parameter, and the first parameter is sent to a computer board of the clothes dryer;

[0107] S2, the computer board compares the first parameter with a preset first threshold value, and if the first parameter is greater than the first threshold value, the computer board controls the clothes dryer to execute a cleaning program;

[0108] The first parameter is a first wind resistance parameter, and the first threshold value is a first wind resistance threshold value.

[0109] The control method specifically comprises: during the operation of the clothes dryer, the detection part continuously detects the air resistance at the mesh structure of the filtering part, obtains a first parameter, and sends the first parameter to the computer board; the computer board compares the received first parameter with a preset first air resistance threshold value; if the first parameter is greater than the first air resistance threshold value, the computer board determines that there is more lint attached in the filtering part, and controls the clothes dryer to execute a cleaning program.

[0110] Further, the control method of the clothes dryer further comprises,

[0111] S3, after the drying process is completed, the computer board controls the clothes dryer to execute the cleaning program again.

[0112] The above scheme executes the cleaning program again after the drying process is completed, so that the lint separation device is always in a clean state, and the reduction of the circulation efficiency caused by the long-term attachment of lint and sundries is avoided.

[0113] Further, the control method of the clothes dryer of the lint separation device further comprises,

[0114] S4, in the cleaning program, the detection part continues to detect the air resistance of the filtering part to obtain a second parameter, and the computer board compares the second parameter with a second threshold value; if the second parameter is less than the second threshold value, the cleaning program is ended.

[0115] The second parameter is a second air resistance parameter, and the second threshold value is a second air resistance threshold value, which is less than the first air resistance threshold value.

[0116] Specifically, during the discharging process, the detection part continues to detect the air resistance at the mesh structure of the filtering part to obtain a second parameter, and sends the second parameter to the computer board; the computer board compares the received second parameter with a preset second air resistance threshold value; when the second parameter is less than the second air resistance threshold value, it is determined that the filtering part is cleaned, and the clothes dryer is controlled to end the cleaning program.

[0117] Alternatively, as an alternative to the above scheme, step S4 is: the computer board times the running time of the cleaning program, and ends the cleaning program when the running time reaches a preset time.

[0118] Further, the cleaning program in the above scheme specifically comprises:

[0119] The computer board controls the high-frequency pneumatic device to be turned on to release flushing gas to clean the filter screen.

[0120] Embodiment eight

[0121] As another embodiment of the present application, the embodiment provides a control method of the clothes dryer with the lint separating device as described in the embodiment four, and the specific control method is the same as that of the embodiment seven, except that in the embodiment, the detecting unit is a humidity sensor, continuously detecting the humidity of the filtering unit, the first parameter is a first humidity parameter, the second parameter is a second humidity parameter, the first threshold is a first humidity threshold, and the second threshold is a second humidity threshold, and the second humidity threshold is less than the first humidity threshold.

[0122] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed above with preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content with equivalent embodiments within the scope of the technical solution of the present application. The embodiments in the above embodiments can be further combined or replaced, as long as they do not deviate from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belong to the scope of the present application.

Claims

1. A lint separating device provided inside an air duct, both ends of the air duct being provided with an air inlet and an air outlet, respectively, characterized in that, The lint separating device comprises, a filter assembly in communication with the outside of the air duct, having a mesh structure for filtering and guiding the lint; a cleaning part provided on the mesh structure of the filter assembly for cleaning the lint attached to the mesh structure; an exhaust port provided on the air duct wall of the air duct, and the filter assembly comprises, a first filter part partially covering the cross section of the air duct; a second filter part provided at the rear of the first filter part in the air outlet direction, and connecting the part of the cross section of the air duct not covered by the first filter part with the exhaust port; the first filter part has a funnel structure covering the cross section of the air duct, and has an opening at the base of the funnel structure, and the second filter part connects the opening with the exhaust port; the mesh structure comprises at least two layers of filter screens, and a gap is formed between adjacent two layers of filter screens; the cleaning part is a high-frequency pneumatic device provided at one end of the mesh structure close to the air inlet of the air duct, and is used for providing flushing gas from the gap between adjacent two layers of filter screens to the other end of the mesh structure close to the air outlet of the air duct.

2. The lint separating device of claim 1, wherein The second filter part has a mesh structure.

3. The lint separating device of claim 2, wherein, The mesh structure is located at one end of the second filter part close to the first filter part.

4. The lint separating device of claim 2, wherein, The first filter part is a baffle, and the baffle has uniformly arranged through holes.

5. The lint separating device of claim 1 or 4, wherein, The first filter part has a mesh structure.

6. The lint separating device of claim 1, wherein, Further comprising, a detection part provided on the mesh structure for detecting the wind resistance or humidity at the mesh structure.

7. A control method of a clothes dryer having the lint separating device according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, continuously detecting the wind resistance or humidity at the mesh structure during the drying process to obtain a first parameter, and sending the first parameter to the computer board of the dryer; S2, comparing the first parameter with a preset first threshold value, and if the first parameter is greater than the first threshold value, controlling the dryer to execute a cleaning program; The first parameter comprises a first wind resistance threshold value and a first humidity threshold value, and when the first parameter is a first wind resistance parameter, the first threshold value is the first wind resistance threshold value; and when the first parameter is a first humidity parameter, the first threshold value is the first humidity threshold value.

8. The control method of the clothes dryer according to claim 7, characterized in that, Further comprising, S3, after the drying process is completed, the computer board controls the dryer to execute the cleaning program again.

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