A washing machine and a self-cleaning method for the drum

Abstract

This invention discloses a washing machine and a drum self-cleaning method. The drum self-cleaning method includes: activating a drum self-cleaning mode; determining whether detergent has been added to the washing machine; if so, controlling and reducing the temperature of the washing water and / or the rotation speed of the inner drum during the drum self-cleaning process. During the drum self-cleaning process, this invention reduces the water temperature and / or the inner drum rotation speed when it detects that the user has mistakenly added detergent, minimizing foam generation. By employing the above-mentioned drum self-cleaning method, the washing machine provided by this invention will not experience excessive foam overflow even if the user mistakenly adds detergent. This effectively avoids problems such as rust and short circuits caused by excessive foam in the internal components of the washing machine due to accidental detergent addition, helping to extend the service life of the washing machine, prevent short circuits, and improve the user experience.

Description

Technical Field

[0001] This invention belongs to the field of washing machine technology, specifically, it relates to a washing machine and a drum self-cleaning method. Background Technology

[0002] With the improvement of people's living standards, washing machines have become an indispensable household appliance. Washing machines used for extended periods are prone to bacterial and mold growth due to their dark and damp interiors, which is detrimental to the cleanliness of clothes and health. Therefore, most users activate the drum self-cleaning function after a period of use to allow the washing machine to clean itself and remove the dirt and debris accumulated over the years.

[0003] However, most users are unfamiliar with the detailed operation of the washing machine's self-cleaning mode. Therefore, they often add laundry detergent or liquid to the washing machine to enhance or improve the cleaning effect. However, under normal circumstances, the washing machine's self-cleaning process does not require the addition of detergent or other cleaning agents. Even some models that require detergent need to be used, specifically for cleaning the internal components, and other conditions need to be adjusted compared to traditional or general self-cleaning programs. Therefore, for most washing machines, accidentally adding detergent during the drum cleaning program will generate a large amount of foam, which can corrode internal components and even cause short circuits. Therefore, there is an urgent need for a washing machine control method that can reduce or even avoid the generation of excessive foam after accidentally adding detergent or liquid.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a washing machine and a drum self-cleaning method. During the drum self-cleaning process, when it is determined that the user has mistakenly added detergent, this invention reduces the water temperature and the inner drum speed to minimize foam generation. By employing the above-mentioned drum self-cleaning method, the washing machine provided by this invention will not experience excessive foam overflow even if the user mistakenly adds detergent. This effectively avoids problems such as rusting and short circuits caused by excessive foam in the internal components of the washing machine due to accidental detergent addition, thus helping to extend the service life of the washing machine, prevent short circuits, and improve the user experience.

[0006] To solve the above-mentioned technical problems, the first aspect of this application discloses a self-cleaning method for a washing machine drum, comprising:

[0007] Start the self-cleaning mode.

[0008] Determine if detergent has been added to the washing machine. If so, during the drum self-cleaning process, control and reduce the temperature of the washing water and / or the rotation speed of the inner drum.

[0009] Furthermore, the turbidity level of the washing water inside the washing machine can be used to determine whether detergent has been added.

[0010] If the turbidity value of the washing water is detected to be greater than the set threshold during the set time of the washing machine's drum self-cleaning mode, it can be inferred that detergent has been added to the washing machine. Then, the washing machine will be controlled to keep the water temperature and / or the inner drum speed from exceeding the set water temperature and / or the inner drum speed from exceeding the set speed during the drum self-cleaning process.

[0011] Furthermore, the self-cleaning mode of the cylinder defaults to rinsing the inner cylinder with high-temperature clean water at high speed.

[0012] If the turbidity value of the cleaning water is detected to be greater than the set threshold during the water filling process of the self-cleaning mode of the start cylinder or within a set time after the water filling is completed;

[0013] It will then issue a warning signal to the user and control the temperature of the cleaning water to remain below the set temperature until the cleaning is finished.

[0014] Preferably, the default temperature of the cleaning water in the self-cleaning mode is 85-90℃, and the set water temperature is 35-60℃.

[0015] Furthermore, when the turbidity value of the cleaning water is detected to be greater than the set threshold, the temperature of the cleaning water is controlled to decrease from the default temperature to the set water temperature, while the inner drum speed is controlled to decrease from the default speed to the set speed.

[0016] Wherein: the default speed is 1100-1200 rpm, and the set speed is 400-800 rpm.

[0017] Furthermore, if it is determined that the user has added laundry detergent, the following steps are performed:

[0018] Obtain the amount of laundry detergent added, and adjust the temperature of the washing water and / or the rotation speed of the inner drum accordingly based on the amount of laundry detergent added.

[0019] Furthermore, the amount of detergent added is inferred based on the detected turbidity value of the washing water. The washing machine stores at least two turbidity threshold ranges, with different turbidity threshold ranges corresponding to different water temperatures and / or drum rotation speeds.

[0020] Furthermore, the turbidity threshold range includes a high threshold range and a medium threshold range:

[0021] If the detected turbidity value is in the high threshold range, it is determined that the user has added too much detergent. The washing machine will then reduce the inner drum speed to the first preset speed and control the washing water temperature to not exceed the first preset temperature.

[0022] If the detected turbidity value is in the middle threshold range, it is determined that the user has added a small amount of detergent. The washing machine is then controlled to reduce the inner drum speed to the second preset speed and the washing water temperature is controlled to not exceed the second preset temperature.

[0023] Wherein: the first preset rotation speed is less than the second preset rotation speed, and the first preset temperature is less than the second preset temperature.

[0024] Preferably, the first preset rotation speed is 400-600 rpm, the first preset temperature is 35-40℃, the second preset rotation speed is 700-800 rpm, and the second preset temperature is 50-60℃.

[0025] More preferably, the first preset rotation speed is 600 rpm, the first preset temperature is 40°C, the second preset rotation speed is 800 rpm, and the second preset temperature is 60°C.

[0026] Furthermore, the turbidity threshold range also includes a low threshold range.

[0027] If the turbidity value of the washing water is detected to be in the low threshold range, it is determined that the user has added a very small amount of detergent to the washing machine or has not added detergent at all. The washing machine drum is then kept at its default speed and the washing water temperature is kept at its default temperature. The drum self-cleaning program is then executed.

[0028] Furthermore, the self-cleaning method for the cylinder also includes the following steps:

[0029] Obtain the initial turbidity value of the clean water injected into the washing machine;

[0030] After water filling is completed, check the current turbidity value of the cleaning water in the inner cylinder;

[0031] The difference between the current turbidity value and the initial turbidity value of the washing water is used to determine whether the user has added laundry detergent and the amount of detergent added.

[0032] A second aspect of this application also provides a control method for applying the above-described drum self-cleaning method, wherein the washing machine includes:

[0033] Turbidity detection unit, used to detect the turbidity value of the cleaning water;

[0034] The control unit adjusts the temperature of the cleaning water and / or the rotation speed of the inner drum based on the turbidity value of the cleaning water detected by the turbidity detection unit.

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

[0036] 1. During the drum self-cleaning process, when it is determined that the user has mistakenly added detergent, the present invention reduces the water temperature and / or the inner drum speed to minimize foam generation. The washing machine provided by the present invention, by adopting the above-mentioned drum self-cleaning method, will not produce a large amount of foam overflow even if the user mistakenly adds detergent. This effectively avoids problems such as rusting and short circuits caused by excessive foam in the internal components of the washing machine due to accidental addition of detergent, helps to extend the service life of the washing machine, prevents short circuits, and improves the user experience.

[0037] 2. This invention is equipped with a turbidity detection unit, which can detect the turbidity value of the washing water in real time. Based on the turbidity value, the washing water temperature and drum speed are specifically set to achieve better cleaning results. To obtain a more accurate turbidity value, the washing machine starts detecting the turbidity value of the clean water at the clean water inlet. After the clean water and any added detergent are fully mixed, or after the value detected by the turbidity detection unit stabilizes, the turbidity value of the washing water is obtained. The difference between the two turbidity values ​​is calculated to obtain a more accurate turbidity value. Based on this turbidity value, the washing water temperature and drum speed are adjusted, thereby accurately regulating the water temperature and drum speed, minimizing the amount of detergent foam generated, and achieving the self-cleaning purpose of the washing machine drum.

[0038] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0039] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0040] Figure 1 This is a schematic diagram of the implementation process of a washing machine drum self-cleaning method in an embodiment of the present invention. Figure 1 ;

[0041] Figure 2 This is a schematic diagram of the implementation process of a washing machine drum self-cleaning method in an embodiment of the present invention. Figure 2 ;

[0042] Figure 3 This is a schematic diagram illustrating the implementation process of a turbidity value acquisition method in an embodiment of the present invention.

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The present invention will be further described in detail below with reference to the embodiments.

[0048] like Figure 1-3 As shown, this embodiment discloses a drum self-cleaning method for a washing machine, including: activating the drum self-cleaning mode; determining whether detergent has been added to the washing machine; if so, controlling and reducing the temperature of the washing water and / or the rotation speed of the inner drum during the drum self-cleaning process.

[0049] In this embodiment, during the drum self-cleaning process, if it is determined that the user has mistakenly added detergent, the water temperature and / or the inner drum speed are reduced to minimize foam generation. By adopting the above-mentioned drum self-cleaning method, the washing machine provided in this embodiment will not experience excessive foam overflow even if the user mistakenly adds detergent. This effectively avoids problems such as rusting and short circuits caused by excessive foam in the internal components of the washing machine due to accidental addition of detergent, thus helping to extend the service life of the washing machine, prevent short circuits, and improve the user experience.

[0050] Understandably, if a user's washing machine is a standard model with a default self-cleaning program that uses hot water to clean the drum at high speed, the turbidity of the wash water can indicate whether detergent has been added. This is because the turbidity of clean water is close to zero or very low, while the turbidity of the mixture formed by adding detergent increases significantly. Therefore, appropriately lowering the wash water temperature and drum speed from the default temperature and speed of the self-cleaning program can significantly reduce foam production and minimize the impact of detergent on the washing machine during the self-cleaning process.

[0051] Furthermore, the presence of detergent can be determined based on the turbidity of the washing water inside the washing machine: if the turbidity of the washing water is greater than the set threshold during the set time of the washing machine's drum self-cleaning mode, it can be inferred that detergent has been added to the washing machine. In this case, the washing machine will be controlled to ensure that the water temperature does not exceed the set water temperature and / or the drum speed does not exceed the set speed during the drum self-cleaning process.

[0052] It is understandable that the threshold set here can be a specific value or a range of one or more values.

[0053] Preferably, the set water temperature is 35-60℃, and the set rotation speed is 400-800 rpm. The temperature of the cleaning water and the rotation speed are adjusted according to the detected turbidity value. High turbidity values ​​correspond to lower temperature cleaning water and lower rotation speed to reduce foam generation.

[0054] Furthermore, the self-cleaning mode of the cylinder defaults to rinsing the inner cylinder with high-temperature clean water at high speed.

[0055] If the turbidity value of the cleaning water is detected to be greater than the set threshold during the water filling process of the self-cleaning mode of the start cylinder or within the set time after the water filling is completed, an early warning signal will be issued to the user, and the temperature of the cleaning water will be controlled to stop rising after reaching the set water temperature below the default temperature until the cleaning is completed.

[0056] Preferably, the default temperature of the cleaning water in the self-cleaning mode is 85-90℃.

[0057] Understandably, without adding laundry detergent or cleaning agent, the water temperature is set to a higher temperature to clean the inner drum more thoroughly, which not only removes dirt quickly but also sterilizes it.

[0058] Warning signals can be flashing lights or voice alarms.

[0059] Furthermore, when the turbidity value of the cleaning water is detected to be greater than the set threshold, the temperature of the cleaning water is controlled to decrease from the default temperature to the set water temperature, while the default rotation speed of the inner drum is controlled to decrease to the set rotation speed; wherein: the default rotation speed is 1100-1200 rpm.

[0060] like Figure 2 As shown, further, if it is determined that the user has added laundry detergent, the following steps are performed:

[0061] Obtain the amount of laundry detergent added, and adjust the temperature of the washing water and / or the rotation speed of the inner drum accordingly based on the amount of laundry detergent added.

[0062] Furthermore, the amount of detergent added is inferred based on the detected turbidity value of the washing water. The washing machine stores at least two turbidity threshold ranges, with different turbidity threshold ranges corresponding to different water temperatures and / or drum rotation speeds.

[0063] Furthermore, the turbidity threshold range includes a high threshold range and a medium threshold range.

[0064] If the detected turbidity value is in the high threshold range, it is determined that the user has added too much detergent. The washing machine will then reduce the inner drum speed to the first preset speed and control the washing water temperature to not exceed the first preset temperature.

[0065] If the detected turbidity value is within the middle threshold range, it is determined that the user has added a small amount of detergent. The washing machine is then controlled to reduce the inner drum speed to the second preset speed and the washing water temperature is controlled to not exceed the second preset temperature. Wherein, the first preset speed is less than the second preset speed and the first preset temperature is less than the second preset temperature.

[0066] Preferably, the first preset rotation speed is 400-600 rpm, the first preset temperature is 35-40℃, the second preset rotation speed is 700-800 rpm, and the second preset temperature is 50-60℃.

[0067] More preferably, the first preset rotation speed is 600 rpm, the first preset temperature is 40°C, the second preset rotation speed is 800 rpm, and the second preset temperature is 60°C.

[0068] Understandably, the amount of laundry detergent added is initially determined based on the detected turbidity value. If less detergent is added, the washing machine speed and water temperature are lowered; if more detergent is added, the washing machine speed and water temperature are lowered to avoid or prevent excessive foam production.

[0069] Furthermore, the turbidity threshold range also includes a low threshold range; if the turbidity value of the washing water is detected to be in the low threshold range, it is determined that the user has added a very small amount of detergent to the washing machine or has not added detergent, and the washing machine drum is controlled to maintain the default speed and the washing water temperature is maintained at the default temperature, and the drum self-cleaning program is executed.

[0070] More preferably, if the detected turbidity value is in the high threshold range, the washing machine controls the inner drum speed to decrease from the default speed of 1200 rpm to 600 rpm, and the washing water temperature does not exceed 40°C, until the drum self-cleaning mode ends.

[0071] If the detected turbidity value is within the middle threshold range, the washing machine will control the inner drum speed to decrease from the default speed of 1200 rpm to 800 rpm, and the washing water temperature will not exceed 60℃ until the drum self-cleaning mode ends.

[0072] If the detected turbidity value is in the low threshold range, the washing machine drum will maintain a speed of 1200 rpm, and the washing water temperature will not exceed 90℃.

[0073] It is understandable that multiple threshold ranges can be set to match the corresponding water temperature and cylinder rotation speed, which will not be listed here.

[0074] Furthermore, to obtain more accurate turbidity values, such as Figure 3 As shown, it also includes the following steps:

[0075] Obtain the initial turbidity value of the clean water injected into the washing machine.

[0076] After water filling is completed, check the current turbidity value of the cleaning water in the inner cylinder.

[0077] The difference between the current turbidity value and the initial turbidity value of the washing water is used to determine whether the user has added laundry detergent and the amount of detergent added.

[0078] To obtain a more accurate turbidity value, the washing machine starts detecting the turbidity of the clean water at the clean water inlet. After the clean water is fully mixed with any detergent that may be added, or after the value detected by the turbidity detection unit stabilizes, the turbidity value of the washing water is obtained. The difference between the two turbidity values ​​is then calculated to obtain a more accurate turbidity value. Based on this turbidity value, the washing water temperature and drum speed are adjusted, thereby accurately regulating the water temperature and drum speed to minimize the amount of detergent foam produced, and also achieving the purpose of self-cleaning the detergent drum.

[0079] After the water filling process is completed, a preferred method for detecting the current turbidity value of the cleaning water in the inner cylinder includes: activating the cylinder self-cleaning mode; after water filling is complete, and once the cleaning water reaches a first preset temperature, acquiring the current turbidity value of the cleaning water. It is understandable that this further limits the timing of the detection, making the acquired turbidity value more representative.

[0080] A second aspect of this application also provides a washing machine that applies the above-described drum self-cleaning method, the washing machine comprising:

[0081] Turbidity detection unit, used to detect the turbidity value of the cleaning water;

[0082] The control unit adjusts the temperature of the cleaning water and / or the rotation speed of the inner drum based on the turbidity value of the cleaning water detected by the turbidity detection unit.

[0083] The turbidity detection unit includes a turbidity sensor component with waterproof temperature measurement function. It can detect the water temperature of clean water or cleaning water, the turbidity value of clean water, and the turbidity value of cleaning water in real time.

[0084] The turbidity sensor assembly includes a turbidity sensor with an infrared pair inside. When light passes through a certain amount of water, the amount of light transmitted depends on the turbidity of the water; the more turbid the water, the less light passes through. The light receiver converts the intensity of the transmitted light into a corresponding current; the more light transmitted, the greater the current, and vice versa. The turbidity detection unit converts the output current signal into a voltage signal. By using a pre-set voltage threshold range, it determines which range the measured voltage falls within, thereby adjusting the temperature of the cleaning water and the drum rotation speed.

[0085] Installing a turbidity sensor kit with waterproof and temperature measurement capabilities effectively prevents excessive detergent foam from leaking out of multiple openings during the self-cleaning process caused by users accidentally pouring detergent into the drum. The waterproof and temperature-measuring turbidity sensor kit is inexpensive, easy to use, and highly accurate, leading to its widespread adoption.

[0086] This invention is equipped with a turbidity detection unit, which can detect the turbidity value of the cleaning water in real time, and set the temperature of the cleaning water and the rotation speed of the drum according to the magnitude of the turbidity value, so as to achieve a better cleaning effect.

[0087] Example 1

[0088] like Figure 2As shown, in this embodiment, a turbidity sensor component with waterproof temperature measurement function is installed at the water inlet of the washing machine's drain motor. Simultaneously, the washing machine is pre-set with standard threshold intervals a1(v), a2(v), and a3(v) for the difference in water turbidity increase. These standard threshold intervals are set to three levels: high pressure, medium pressure, and low pressure, corresponding to water turbidity concentrations of a1(v), a2(v), and a3(v), respectively. When a user accidentally pours in laundry detergent and activates the self-cleaning mode of the drum, clean water is injected into the inlet (the turbidity of the clean water varies due to various objective factors, so the initial turbidity value may not be 0 (v)). At this time, the turbidity sensor measures the turbidity value as b (v). As the program runs, the temperature gradually increases and the water becomes turbid. When the temperature reaches 40 degrees, the device is triggered to detect the turbidity of the water again as c (v). The latter is subtracted from the former c (v) - b (v) = d (v), and it is determined which threshold interval a1 (v), a2 (v), or a3 (v) d (v) belongs to.

[0089] When d(v) falls within the range of a1(v), it is determined that the water turbidity is high, indicating that the water in the washing machine is not clean. It is concluded that the user has poured in a large amount of laundry detergent or a foaming / concentrated laundry detergent. At this time, the device issues a warning signal and links the washing machine controller to reduce the speed from the original default program speed of 1200 rpm to 600 rpm, and the temperature inside the drum no longer rises, remaining at 40℃ until the drum self-cleaning mode ends.

[0090] When d(v) falls within the a2(v) range, the water turbidity is determined to be of medium grade, and the temperature can continue to rise to 60℃. At the same time, the controller program will reduce the default speed from the original 1200 rpm to 800 rpm until the self-cleaning mode ends.

[0091] When d(v) falls within the a3(v) range, the water turbidity is considered relatively clear, and the temperature can continue to rise to 90℃ until the self-cleaning mode of the drum ends.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method of self-cleaning of a drum of a washing machine, characterized in that, Comprise: Starting the drum self-cleaning mode; According to the turbidity value of the washing water in the washing machine to determine whether the laundry detergent is put in, if the turbidity value of the washing water is greater than the set threshold value within the set time of the drum self-cleaning mode of the washing machine, it is judged that the laundry detergent is put in the washing machine, and the water temperature is not higher than the set water temperature and / or the inner drum speed is not higher than the set speed in the process of drum self-cleaning; Obtain the amount of laundry detergent, and adjust the temperature and / or inner drum speed of the washing water according to the amount of laundry detergent.

2. The method of claim 1, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The default temperature of the drum self-cleaning mode is 85-90℃, and the set water temperature is 35-60℃. In the process of starting the drum self-cleaning mode or within the set time after the water injection is completed, if the turbidity value of the washing water is greater than the set threshold value; Then send a warning signal to the user, and control the temperature of the washing water to be lower than the default temperature after reaching the set water temperature, and then do not increase until the end of washing.

3. The method of claim 2, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The default temperature of the drum self-cleaning mode is 85-90℃, and the set water temperature is 35-60℃.

4. The method of claim 3, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. In the process of starting the drum self-cleaning mode or within the set time after the water injection is completed, if the turbidity value of the washing water is greater than the set threshold value; Wherein: the default speed is 1100-1200 revolutions / minute, and the set speed is 400-800 revolutions / minute.

5. The method of claim 1, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. According to the detected turbidity value of the washing water, the amount of laundry detergent is inferred, and the washing machine stores at least two turbidity threshold intervals, different turbidity threshold intervals correspond to different water temperature and / or inner drum speed.

6. The method of claim 5, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The turbidity threshold interval includes a high threshold interval and a medium threshold interval; If the detected turbidity value is in the high threshold interval, it is determined that the user has put too much laundry detergent, and the inner drum speed of the washing machine is controlled to be reduced to a first preset speed, and the maximum temperature of the washing water of the washing machine is controlled to be not higher than a first preset temperature; If the detected turbidity value is in the medium threshold interval, it is determined that the user has put a small amount of laundry detergent, and the inner drum speed of the washing machine is controlled to be reduced to a second preset speed, and the maximum temperature of the washing water of the washing machine is controlled to be not higher than a second preset temperature; Wherein: the first preset speed is less than the second preset speed, and the first preset temperature is less than the second preset temperature.

7. The method of claim 6, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The first preset speed is 400-600 revolutions / minute, the first preset temperature is 35-40℃, the second preset speed is 700-800 revolutions / minute, and the second preset temperature is 50-60℃.

8. The method of claim 7, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The first preset speed is 600 revolutions / minute, the first preset temperature is 40℃, the second preset speed is 800 revolutions / minute, and the second preset temperature is 60℃.

9. The method of claim 6, wherein the cleaning of the drum is performed by a cleaning cycle of the washing machine. The turbidity threshold interval also includes a low threshold interval; If the turbidity value of the washing water is in the low threshold interval, it is determined that the user has put a very small amount of laundry detergent or no laundry detergent into the washing machine, and the inner drum of the washing machine is controlled to maintain the default speed and the washing water temperature to maintain the default temperature, and the drum self-cleaning program is executed.

10. The method according to any of the claims 1-9, characterized in that, Also include the following steps: Obtain the initial turbidity value of the washing water injected into the washing machine; After the water injection is completed, the current turbidity value of the washing water in the inner drum is detected; According to the difference between the current turbidity value and the initial turbidity value of the washing water, whether the user has put in the laundry detergent and the amount of the laundry detergent put in are determined.

11. A laundry machine characterized by The laundry machine comprises: a turbidity detection unit for detecting the turbidity value of the washing water; a control unit for regulating the temperature and / or the rotation speed of the inner drum of the washing water according to the turbidity value of the washing water detected by the turbidity detection unit.

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