Clothes dryer with lint filtering device and lint automatic cleaning control method

Abstract

The present invention discloses a clothes dryer with a lint filtering device and a method for automatically cleaning lint. The lint filtering device is arranged in the air duct of the clothes dryer, comprises a filtering part for filtering lint, a collecting part connected with the filtering part for collecting lint, a first channel connecting the collecting part and a drain pipe of the clothes dryer for discharging the lint, a second channel connected with the collecting part for passing a cleaning medium into the collecting part, and a detecting part arranged on the collecting part for detecting the wind resistance at the filter. The collecting part is connected with the inside of the clothes dryer air duct through the filter, and a water retaining part for blocking the cleaning medium is provided at the lower part of the filter. Before the drying process is started, the detecting part detects the wind resistance at the filter to obtain a first parameter, sets a wind resistance threshold according to the first parameter, and then continues to detect the wind resistance at the filter to obtain a second parameter during the drying process. When the second parameter is greater than the wind resistance threshold, the clothes are dried and the automatic cleaning program is run, and the cleaning medium enters the collecting part to clean the lint.

Description

Technical Field

[0001] The present invention belongs to the field of clothes dryers, and in particular relates to a clothes dryer with a lint filtering device and a lint automatic cleaning control method. Background Art

[0002] During the operation of the dryer, the fluff and lint on the clothes will inevitably flow with the drying air and be blocked by the lint filter and remain on the lint filter. As the dryer is used, the fluff and lint accumulate on the lint filter and block the flow of drying air, resulting in reduced drying efficiency and poor drying effect of the dryer.

[0003] In order to solve this problem, the prior art usually sets the lint filter device as a detachable structure. After the dryer has been used for a period of time, the filter device needs to be removed for cleaning, or the filter device needs to be sprayed with water for cleaning by a cleaning device to ensure the normal operation of the dryer.

[0004] Chinese invention patent application number CN201210575631.7 discloses a lint filter device, comprising a first lint filter layer, a second lint filter layer and a three-layer lint filter layer. The first lint filter layer and the second lint filter layer are mutually engaged and installed under the door body of the front air duct at the air outlet of the dryer drum. The third lint filter layer is arranged in the internal air path of the dryer. Lint is filtered and collected by multiple filter layers, and the filter device is taken out for cleaning. Although the above scheme achieves the filtering and collection of lint, there is still lint attached to the filter screen, which creates resistance to the flow of dry air. If the user fails to clean the filter screen in time, the drying efficiency of the dryer will be greatly reduced. If the user frequently disassembles and cleans it, the sealing performance of the filter screen in the air duct may be reduced, resulting in a reduced filtering effect.

[0005] Chinese invention patent application number CN201410218989.3 discloses a lint filtering structure, a washer-dryer and a control method. The washer-dryer includes a filter screen for filtering lint, a Teflon coating is sprayed on the surface of the filter screen, and a flushing structure is provided for flushing lint attached to the filter screen. An electric cleaning brush is also provided for cleaning the filter screen. The self-cleaning of the filter screen is achieved through the above scheme. Although the above scheme achieves self-cleaning of lint, the lint attached to the filter screen will affect the flow of circulating air and affect the drying efficiency of the washer-dryer.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a dryer with a lint filtering device to address the problems in the above-mentioned prior art. The lint filtering device is arranged in the air duct of the dryer, and includes a filtering part for filtering lint, a collecting part for collecting lint filtered by the filtering part, and a cleaning part for cleaning the lint collected by the collecting part. Through the above-mentioned scheme, the collection and automatic cleaning of lint are realized, thereby avoiding the accumulation of lint that affects the drying effect.

[0008] Another object of the present invention is to provide an automatic lint cleaning control method, which detects the wind resistance at the filter on the collection part and establishes a wind resistance threshold before the drying process is started, and continues to detect the wind resistance at the filter during the drying process to obtain a second parameter. If the second parameter is greater than the wind resistance threshold, the dryer performs an automatic lint cleaning program, thereby realizing automatic cleaning of lint and improving the user experience.

[0009] In order to achieve the above-mentioned object, the present invention provides a clothes dryer with a lint filter device in a first aspect. The lint filter device is arranged in an air duct of the clothes dryer, comprising:

[0010] The filter portion includes a first air duct and a second air duct arranged side by side and connected to each other, wherein a filter unit is provided in the first air duct, and the filter unit is used to filter the lint and guide the lint to the second air duct;

[0011] The cleaning portion is communicated with the air outlet end of the second air duct and is used for discharging the lint in the second air duct.

[0012] Furthermore, the cleaning unit includes:

[0013] The first channel has one end connected to the air outlet end of the second air duct and the other end connected to the drainage pipeline of the clothes dryer.

[0014] In the above solution, the lint that enters the second air duct is driven by the circulating air to enter the first channel from the air outlet of the second air duct and then enter the drainage pipe from the first channel, thereby achieving full cleaning of the lint.

[0015] Furthermore, the lint filtering device further comprises:

[0016] a collecting portion, connected to the air outlet end of the second air duct, for collecting lint discharged from the second air duct;

[0017] The first channel is communicated with the collecting portion, and is communicated with the air outlet end of the second air duct through the collecting portion.

[0018] In the above solution, the collecting part can collect the lint discharged from the air outlet of the second air duct, so as to prevent the lint from returning to the filtering part and affecting the lint filtering effect when the lint cannot be completely discharged from the first channel.

[0019] Furthermore, the cross-sectional area of ​​the collecting portion gradually decreases in a direction away from the second air duct outlet, and the first channel is connected to an end of the collecting portion away from the second air duct outlet.

[0020] The above solution avoids dead corners in the collecting portion, making it difficult for wire scraps to adhere to the collecting portion, thereby preventing the accumulation of wire scraps in the dead corners and causing blockage of the first channel.

[0021] Furthermore, the collecting unit includes:

[0022] The filter is arranged on the side of the collecting part, and the collecting part is communicated with the interior of the air duct of the clothes dryer through the filter.

[0023] In the above solution, the circulating air that sends the lint into the collection part can return to the air duct of the dryer through the filter to continue circulating, avoiding the waste of heat in the circulating air caused by the circulating air being discharged together with the lint.

[0024] Furthermore, the cleaning unit also includes:

[0025] a second channel, connected to the collecting portion, for injecting a cleaning medium into the collecting portion;

[0026] The wire scraps collected by the collecting portion are discharged from the first channel under the drive of the cleaning medium.

[0027] In the above solution, the cleaning medium is injected into the collecting portion through the second channel, and the cleaning medium is used to clean the residual medium in the collecting portion.

[0028] Furthermore, the second channel is connected to the water inlet pipe of the clothes dryer.

[0029] Alternatively, as an alternative to the above solution, a water storage box is provided inside the clothes dryer, and the second channel is connected to the water storage box.

[0030] Alternatively, as an alternative to the above solution, an air blowing device is provided in the clothes dryer, and the second channel is connected to the air blowing device.

[0031] Furthermore, the collection unit also includes,

[0032] The nozzle is provided on the collecting box and is communicated with the second channel, and is used for spraying the cleaning medium onto the filter screen.

[0033] In the above solution, part of the cleaning medium in the second channel is sprayed onto the filter through the nozzle, which can clean the lint attached to the filter. The cleaned lint is discharged from the first channel, thereby achieving full cleaning of the collection part.

[0034] Preferably, the cleaning medium is water.

[0035] Furthermore, the collection unit further includes:

[0036] The water retaining portion is extended from the lower end of the filter screen to the outside of the collecting portion and is used to retain the cleaning medium passing through the filter screen.

[0037] In the above scheme, when water is used as the cleaning medium to clean lint, part of the cleaning medium may pass through the filter and enter the air duct of the dryer, affecting the drying effect of the dryer. The water retaining part can block the cleaning medium passing through the filter to avoid affecting the drying effect.

[0038] Furthermore, the clothes dryer with the lint filtering device further includes:

[0039] The detection unit is arranged on the collecting unit and is connected to the computer board of the clothes dryer for detecting the wind resistance at the filter and sending the detection result to the computer board.

[0040] The above scheme detects the wind resistance at the filter screen through the detection unit, and then sends the detection results to the computer board. The computer board can judge whether the amount of residual and attached lint in the collection unit will affect the filtering effect of the lint based on the received detection results. If so, a cleaning instruction is issued, and the cleaning medium enters the collection unit from the second channel to clean the lint to prevent the attached lint from affecting the filtering effect of the lint.

[0041] A second aspect of the present invention provides a method for automatically cleaning and controlling wire scraps, comprising the following steps:

[0042] S1. Detecting the wind resistance at the filter on the collection unit to obtain a first parameter, setting a wind resistance threshold according to the first parameter, and starting a clothes drying process;

[0043] S2. During the drying process, the air resistance at the filter is detected to obtain a second parameter. If the second parameter is greater than an air resistance threshold, the dryer automatically performs a lint cleaning procedure.

[0044] The first parameter is 70% of the wind resistance threshold, and the starting cleaning program is to control the cleaning medium to enter the collecting part to clean the lint attached to the collecting part and the filter net.

[0045] In the above scheme, since the residual situation of lint in the collecting section is different before each drying process is started, the detection section detects the wind resistance at the filter before the drying process is started to obtain a first parameter, and then sends the first parameter to the computer board. The computer board sets the wind resistance threshold according to the first parameter, so that the wind resistance threshold is matched with the residual state of lint in the collecting section before each drying process is started, thereby avoiding repeated cleaning and causing waste of water resources.

[0046] Furthermore, the automatic cleaning control method for wire scraps also includes:

[0047] S3. After the drying process is completed, the automatic cleaning program for lint is performed again.

[0048] The above scheme performs the automatic lint cleaning program again after the drying process is completed, thereby avoiding the influence of excessive lint adhesion on the setting of the wind resistance threshold before the next drying process is started; at the same time, the interval between two drying processes is usually long, and the automatic lint cleaning program is performed after the end of one drying process, so that the water attached to the collecting part and the filter net can be completely dried, and the lint entering the collecting part in the next drying process is less likely to adhere to the collecting part and the filter net. Therefore, the collecting part can collect more lint, reducing the frequency of the automatic cleaning program execution and realizing water resource saving.

[0049] The beneficial effects of the above scheme are:

[0050] Lint filtered by the filter is directly guided to the drain pipe of the dryer through the first channel, thereby achieving automatic cleaning of lint and improving the user experience. The first channel is connected to the second air duct through the collecting section, and the collecting section can buffer the lint discharged from the second air duct to prevent the lint from being unable to be discharged in time and accumulating in the filter section and affecting the filtering effect. The collecting section is connected to the dryer air duct through the filter, and the second channel is connected to the collecting section. Part of the circulating air that sends the lint into the collecting section can pass through the filter and return to the dryer air duct, thereby avoiding wasting heat carried by the circulating air. The second channel guides the cleaning medium into the collecting section, thereby achieving sufficient cleaning of the lint in the collecting section. The water retaining section prevents part of the cleaning medium used to clean the filter from entering the dryer air duct and affecting the drying effect. The wind resistance at the filter on the collecting section is detected by the detecting section, and the accumulation of lint in the collecting section is determined based on the detection result. Then, the collecting section is automatically cleaned through the automatic cleaning program, thereby achieving automatic cleaning of the lint while preventing excessive accumulation of lint from affecting the lint filtering effect, thereby improving the stability of the lint filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a front view of the lint filtering device of the present invention.

[0052] Figure 2 for Figure 1 The right side view of the lint filter is shown.

[0053] Figure 3 The present invention provides a flow chart of the automatic cleaning control method for wire scraps.

[0054] Figure 4 This is another flow chart of the automatic cleaning control method for wire scraps described in the present invention.

[0055] In the figure: 1, filtering part; 11, first air duct; 12, second air duct; 2, cleaning part; 21, first channel; 22, second channel; 3, collecting part; 31, filter screen; 32, water retaining part. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that the following embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0059] Example 1

[0060] As an embodiment of the present invention, this embodiment provides a dryer with a lint filtering device, which is arranged in the air duct of the dryer and includes a filter part 1 for filtering lint and a cleaning part 2 connected to the filter part 1 for discharging lint.

[0061] In this embodiment, if Figure 1 and Figure 2 As shown, the filter unit 1 includes a first air duct 11 and a second air duct 12 arranged side by side and connected to each other. A filter unit is provided in the first air duct 11, and the filter unit is used to filter the lint and guide the lint to the second air duct 12;

[0062] The cleaning portion 2 is communicated with the air outlet end of the second air duct 12 and is used for guiding the lint in the second air duct 12 to be discharged.

[0063] Furthermore, the cleaning unit 2 includes:

[0064] One end of the first channel 21 is connected to the air outlet end of the second air duct 12, and the other end is connected to the drainage pipe of the clothes dryer.

[0065] In the above scheme, the lint filtered out in the first air duct 11 is guided to the second air duct 12 by the filtering unit, and then the lint enters the first channel 21 driven by part of the circulating air entering the second air duct 12, and enters the drainage pipe of the dryer from the first channel 21, thereby realizing automatic cleaning of the lint.

[0066] Example 2

[0067] As another embodiment of the present invention, this embodiment is further improved on the basis of the first embodiment, and the specific improvements are as follows.

[0068] In this embodiment, it also includes:

[0069] The collecting portion 3 is connected to the air outlet of the second air duct 12 and is used to collect the lint discharged from the second air duct 12;

[0070] The first channel 21 is communicated with the collecting portion 3 , and is communicated with the air outlet end of the second air duct 12 through the collecting portion 3 .

[0071] In the above scheme, the first channel 21 is connected to the air outlet end of the second air duct 12 through the collecting part 3. The collecting part 3 serves as a buffer structure and can store some of the lint when there are too many lints to be completely discharged, so as to avoid the lint remaining in the filter part 1 affecting the filtering effect of the lint. Some of the lint stored in the collecting part 3 is gradually discharged from the first channel 21 under the carrying of the circulating air blown out from the air outlet end of the second air duct 12, thereby improving the stability of lint cleaning.

[0072] Furthermore, the cross-sectional area of ​​the collecting portion 3 gradually decreases in a direction away from the air outlet of the second air duct 12 , and the first channel 21 is communicated with an end of the collecting portion 3 away from the air outlet of the second air duct 12 .

[0073] The above solution avoids dead corners in the collecting portion 3 , making it difficult for wire scraps to adhere to the collecting portion 3 , thereby preventing the accumulation of wire scraps in the dead corners and causing blockage of the first channel 21 .

[0074] Example 3

[0075] As another embodiment of the present invention, this embodiment is further improved on the basis of the second embodiment, and the specific improvements are as follows.

[0076] In this embodiment, the collecting unit 3 includes:

[0077] The filter 31 is provided on the side of the collecting portion 3 , and the collecting portion 3 is communicated with the interior of the air duct of the clothes dryer through the filter 31 .

[0078] In the above scheme, the circulating air carrying lint into the collecting part 3 still has a relatively high temperature. The circulating air entering the collecting part 3 is separated from the lint and sent back to the air duct of the dryer through the filter 31, thereby avoiding the waste of heat carried in the circulating air caused by the circulating air being discharged from the first channel 21. The heat in the circulating air can be recovered and reused through the heat pump system, thereby reducing the energy consumption of the dryer.

[0079] Furthermore, the cleaning unit 2 further includes:

[0080] The second channel 22 is communicated with the collecting portion 3 and is used for injecting a cleaning medium into the collecting portion 3 .

[0081] Furthermore, the cleaning medium is water.

[0082] In the above scheme, the cleaning part 2 injects the cleaning medium into the collecting part 3, and the lint attached to the collecting part 3 and the filter screen 31 can enter the drainage pipe from the first channel 21 along with the cleaning medium entering the collecting part 3, thereby achieving sufficient cleaning of the collecting part 3.

[0083] Furthermore, the connection between the second channel 22 and the collecting portion 3 is provided close to an end of the collecting portion 3 away from the air outlet of the second air duct 12 .

[0084] Example 4

[0085] As another embodiment of the present invention, this embodiment is further improved on the basis of the third embodiment, and the specific improvements are as follows.

[0086] In this embodiment, the collecting unit 3 further includes:

[0087] The water retaining portion 32 extends from the lower end of the filter screen 31 toward the outside of the collecting portion 3 and is used to block the cleaning medium passing through the filter screen 31 .

[0088] In the above solution, when water is used as the cleaning medium to clean the filter 31, the cleaning medium may pass through the filter 31 and enter the air duct of the dryer, thereby affecting the drying effect of the dryer. However, the water retaining portion 32 blocks the cleaning medium passing through the filter 31, which can effectively avoid the influence of the cleaning medium on the drying effect.

[0089] Furthermore, the water retaining portion 32 is in communication with the first channel 21 , and guides the collected cleaning medium to the first channel 21 for discharge.

[0090] Furthermore, the collecting unit 3 also includes:

[0091] The nozzle is provided on the collection box and communicates with the second channel 22 , and is used for spraying the cleaning medium toward the filter 31 .

[0092] In the above solution, the cleaning medium is sprayed onto the filter 31 through the nozzle to clean the lint attached to the filter 31, thereby reducing the amount of cleaning medium used during the automatic cleaning process and saving water resources.

[0093] Example 5

[0094] As another embodiment of the present invention, this embodiment is further improved on the basis of the fourth embodiment, and the specific improvements are as follows.

[0095] In this embodiment, the lint filtering device further includes:

[0096] The detection unit is provided on the collection unit 3 and is in communication with the computer board of the clothes dryer. It is used to detect the wind resistance at the filter 31 and send the detection result to the computer board.

[0097] In the above scheme, the detection unit detects the wind resistance at the filter 31, and then sends the detection result to the computer board. The computer board determines whether the amount of residual and attached lint in the collecting part 3 will affect the filtering effect of the lint based on the received detection result. If so, a cleaning instruction is issued, and the cleaning medium enters the collecting part 3 from the second channel 22 to clean the lint.

[0098] The present invention also provides a method for automatically cleaning and controlling lint of a clothes dryer, specifically comprising:

[0099] Example 6

[0100] As another embodiment of the present invention, this embodiment provides a method for automatically cleaning wire scraps, and its control flow chart is as follows: Figure 3 As shown, the following steps are included:

[0101] S1. Detecting the wind resistance at the filter on the collection unit to obtain a first parameter, setting a wind resistance threshold according to the first parameter, and starting a clothes drying process;

[0102] S2. During the drying process, the air resistance at the filter is detected to obtain a second parameter. If the second parameter is greater than an air resistance threshold, the dryer automatically performs a lint cleaning procedure.

[0103] The first parameter is 70% of the wind resistance threshold, and the cleaning procedure is started by controlling the cleaning medium to enter the collecting part, discharging the lint collected in the collecting part and cleaning the filter.

[0104] Specifically:

[0105] Before the drying process starts, the circulating air in the dryer air duct begins to circulate, the detection unit detects the wind resistance at the filter, obtains the first parameter, and then sends the first parameter to the dryer computer board. The computer board sets the wind resistance threshold according to the first parameter. The first parameter is 70% of the wind resistance threshold. After completion, the drying process starts.

[0106] Furthermore, during the drying process, the detection unit continues to detect the wind resistance at the filter to obtain a second parameter, and then sends the second parameter to the computer board. The computer board compares the second parameter with the wind resistance threshold. If the second parameter is greater than the wind resistance threshold, the computer board issues an instruction to control the dryer to execute the automatic cleaning program.

[0107] Example 7

[0108] As another embodiment of the present invention, this embodiment is further improved on the basis of the sixth embodiment, as follows.

[0109] In this embodiment, the process of the automatic cleaning control method of wire scraps is as follows: Figure 4 As shown, it also includes,

[0110] S3. After the drying process is completed, the automatic cleaning program for lint is performed again.

[0111] In the above scheme, the automatic lint cleaning program is performed again after the drying process is completed, which avoids the influence of too much lint adhesion on the setting of the wind resistance threshold before the next drying process is started; at the same time, the interval between two drying processes is usually long, and the automatic lint cleaning program is performed after the end of one drying process. The water attached to the collecting part and the filter net can be completely dried, and the lint entering the collecting part in the next drying process is less likely to adhere to the collecting part and the filter net. Therefore, the collecting part can collect more lint chips, reducing the frequency of the automatic cleaning program execution and realizing water resource saving.

[0112] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above-mentioned embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A clothes dryer with a lint filter device, wherein the lint filter device is arranged in an air duct of the clothes dryer, characterized in that: The lint filtering device comprises: The filter portion includes a first air duct and a second air duct arranged side by side and connected to each other, wherein a filter unit is provided in the first air duct, and the filter unit is used to filter the lint and guide the lint to the second air duct; a cleaning portion, comprising a first channel, one end of which is connected to the air outlet of the second air duct and the other end of which is connected to the drain pipe of the clothes dryer, for guiding the discharge of lint in the second air duct; a collecting portion, connected to the air outlet end of the second air duct, for collecting lint discharged from the second air duct; The first channel is in communication with the collecting portion, and is in communication with the air outlet end of the second air duct through the collecting portion; The collecting part includes a filter screen, which is arranged on the side of the collecting part. The collecting part is connected to the inside of the dryer air duct through the filter screen. The filter screen separates the circulating air entering the collecting part from the lint and sends them back to the dryer air duct.

2. The clothes dryer with a lint filtering device according to claim 1, characterized in that: The cross-sectional area of ​​the collecting portion gradually decreases in a direction away from the second air duct outlet, and the first channel is communicated with an end of the collecting portion away from the second air duct outlet.

3. The clothes dryer with a lint filtering device according to claim 1, characterized in that: The cleaning unit further includes: a second channel, connected to the collecting portion, for injecting a cleaning medium into the collecting portion; The wire scraps collected by the collecting portion are discharged from the first channel under the drive of the cleaning medium.

4. The clothes dryer with a lint filtering device according to claim 3, characterized in that: The cleaning medium is water.

5. The clothes dryer with a lint filtering device according to claim 3 or 4, characterized in that: The collecting unit further includes: The water retaining portion is extended from the lower end of the filter screen to the outside of the collecting portion and is used to retain the cleaning medium passing through the filter screen.

6. The clothes dryer with a lint filtering device according to claim 3 or 4, characterized in that: Also includes, The detection unit is arranged on the collecting unit and is connected to the computer board of the clothes dryer for detecting the wind resistance at the filter and sending the detection result to the computer board.

7. A method for automatically cleaning lint for a clothes dryer according to any one of claims 1 to 6, characterized in that: The following steps are included: S1. Detecting the wind resistance at the filter on the collection unit to obtain a first parameter, setting a wind resistance threshold according to the first parameter, and starting a clothes drying process; S2. During the drying process, the air resistance at the filter is detected to obtain a second parameter. If the second parameter is greater than an air resistance threshold, the dryer automatically performs a lint cleaning procedure. The first parameter is 70% of the wind resistance threshold, and the cleaning program is started by controlling the cleaning medium to enter the collection part to clean the lint attached to the collection part and the filter net.

8. The automatic cleaning control method for wire scraps according to claim 7, characterized in that: Also includes, S3. After the drying process is completed, the automatic cleaning program for lint is performed again.

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