Water level detection method of drum washing machine, drum washing machine

Abstract

The application relates to a water level detection method of a drum washing machine and the drum washing machine, wherein the method comprises the following steps: obtaining a first signal fed back by a sensor when the drum washing machine rotates at a preset rotating speed, wherein the sensor is arranged at a drum opening position of an outer wall of an inner drum of the drum washing machine; the first signal represents time information when the sensor just contacts liquid in the drum washing machine; obtaining a second signal fed back by the sensor, wherein the second signal represents time information when the sensor leaves the liquid; determining a water level height value of the drum washing machine based on the first signal, the second signal and the preset rotating speed; and there is a preset corresponding relationship between the time length when the sensor contacts the liquid determined by the first signal and the second signal, the preset rotating speed and the water level height value. Through the application, the problem that the water level needs to be detected after the drum washing machine is filled with water and then is kept still for a period of time, thereby leading to low water level detection efficiency, is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of washing machine water level detection, and in particular to a water level detection method for a drum washing machine and a drum washing machine. BACKGROUND

[0002] In order to detect the water level during the operation of the drum washing machine, a water level sensor is usually used to detect the water level. The conventional water level sensor of the drum washing machine adopts a pressure sensing principle and is arranged separately from the water containing component. A long hose and a liquid level chamber need to be connected between the water level sensor and the water containing component. This detection method may cause great fluctuations in real-time accurate water level detection due to factors such as rotation of the washing machine inner drum, disturbance of the clothes to the water, excessive foam, high temperature and high pressure causing the pressure in the drum to rise, etc. Real-time water level detection has a certain lag. When accurate water level detection is required, the water level needs to be stationary for a period of time to obtain accurate water level, resulting in a certain lag in information feedback.

[0003] For the above technical problems in the related art, there is currently no effective solution. SUMMARY

[0004] The present application provides a water level detection method for a drum washing machine and a drum washing machine to solve the problem of low water level detection efficiency in the prior art that the water level needs to be detected after a period of time after water is filled into the drum washing machine.

[0005] In a first aspect, the present application provides a water level detection method for a drum washing machine, comprising: acquiring a first signal fed back by a sensor when the drum washing machine rotates at a preset rotating speed, wherein the sensor is arranged at a drum opening position of an outer wall of an inner drum of the drum washing machine; the first signal represents time information when the sensor just contacts a liquid in the drum washing machine; acquiring a second signal fed back by the sensor, wherein the second signal represents time information when the sensor leaves the liquid; determining a water level height value of the drum washing machine based on the first signal, the second signal and the preset rotating speed, wherein there is a preset corresponding relationship between the time length of the sensor contacting the liquid determined by the first signal and the second signal, the preset rotating speed and the water level height value.

[0006] In the second aspect, the present application provides a drum washing machine, comprising: a first acquisition device, for acquiring a first signal fed back by a sensor when the drum washing machine rotates at a preset speed, wherein the sensor is arranged at the drum mouth position of the outer wall of the inner drum of the drum washing machine; the first signal represents the time information when the sensor just contacts the liquid in the drum washing machine; a second acquisition device, for acquiring a second signal fed back by the sensor, wherein the second signal represents the time information when the sensor leaves the liquid; a first processing module, for determining the water level height value of the drum washing machine based on the first signal, the second signal and the preset speed, wherein the length of time the sensor contacts the liquid determined by the first signal and the second signal has a preset corresponding relationship with the preset speed and the water level height value.

[0007] In a third aspect, the present application provides an electronic device comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute the water level detection method for a drum washing machine described in any one of the above items of the present application.

[0008] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the water level detection method for the drum washing machine described in any one of the above items of the present application.

[0009] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application, since the first signal and the second signal are used to indicate the time when the sensor contacts the liquid and the time when it leaves the liquid, that is, the length of time the sensor contacts the liquid can be measured by the first signal and the second signal, and then the corresponding water level height value can be determined by the preset speed and the preset correspondence. Compared with the method in the prior art where the drum washing machine needs to stand for a period of time after water is added before detecting the water level, the efficiency of water level detection is improved, and the sensor is installed in the gap space between the inner and outer drums. This part of the water fluctuates when the washing drum rotates. Due to the narrow gap space, the fluctuation space of the horizontal liquid surface is very limited, and the horizontal liquid surface will be relatively stable. Most of the water wave disturbance caused by the falling of the clothes in the drum is subject to the isolation of the inner drum, and it is difficult to exert a large impact on the horizontal liquid surface in the space between the inner and outer drums. Based on this premise, the relative position of the sensor entering and exiting the water will be accurate, and will not deviate due to the fluctuation of the horizontal liquid surface. Its water level detection is also relatively accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0013] Figure 1 A flow chart of a water level detection method for a drum washing machine provided in an embodiment of the present application;

[0014] Figure 2 This is one of the structural schematic diagrams of the drum washing machine provided in an embodiment of the present application;

[0015] Figure 3 This is a second structural diagram of a drum washing machine provided in an embodiment of the present application;

[0016] Figure 4 An optional flow chart of a water level detection method for a drum washing machine provided in an embodiment of the present application;

[0017] Figure 5 A flow chart of a liquid level detection means and control method for a washing machine provided in an embodiment of the present application;

[0018] Figure 6 A schematic diagram of the water level of a drum washing machine provided in an embodiment of the present application;

[0019] Figure 7 A schematic structural diagram of a drum washing machine provided in an embodiment of the present application;

[0020] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0023] Figure 1 A flow chart of a water level detection method of a drum washing machine provided by the embodiments of the present application is shown in Figure 1 The steps of the method include:

[0024] Step 101, when the drum washing machine rotates at a preset rotating speed, a first signal fed back by a sensor is acquired, wherein the sensor is arranged at a barrel opening position of an outer wall of an inner barrel of the drum washing machine; the first signal represents time information when the sensor just contacts a liquid in the drum washing machine;

[0025] It should be noted that the sensor in the embodiments of the present application is a liquid detection sensor that senses fluid, i.e. feedback signal. In specific examples, the sensor is arranged at the barrel opening position of the outer wall of the inner barrel of the drum washing machine, as shown in Figure 2 and Figure 3

[0026] Step 102, a second signal fed back by the sensor is acquired, wherein the second signal represents time information when the sensor leaves the liquid;

[0027] Step 103, a water level height value of the drum washing machine is determined based on the first signal, the second signal and the preset rotating speed, wherein the duration that the sensor contacts the liquid determined by the first signal and the second signal, the preset rotating speed and the water level height value have a preset corresponding relationship.

[0028] ​It can be seen that, by steps 101 to 103 in the embodiments of the present application, since the first signal and the second signal are used to indicate the time when the sensor contacts the liquid and the time when the sensor leaves the liquid, that is, the time length when the sensor contacts the liquid can be measured through the first signal and the second signal, and then the corresponding water level height value can be determined through the preset rotation speed and the preset corresponding relationship, compared with the way of detecting the water level after the drum washing machine is filled with water and then standing for a period of time in the prior art, the efficiency of water level detection is improved, and the sensor is installed in the gap space between the inner drum and the outer drum. The water in this part fluctuates when the washing drum rotates. Since the gap space is small, the fluctuation space of the horizontal liquid surface is very limited, and the horizontal liquid surface will be relatively stable. The water wave disturbance caused by the clothes in the drum is mostly affected by the isolation of the inner drum, and it is difficult to exert a great influence on the space horizontal liquid surface between the inner drum and the outer drum. Based on this premise, the relative position of the sensor entering the water and leaving the water will be accurate, and there will be no deviation due to the fluctuation of the horizontal liquid surface, and the water level detection is also more accurate.

[0029] In the optional implementation of the embodiments of the present application, for the way of determining the water level height value of the drum washing machine based on the first signal, the second signal and the preset rotation speed in step 103, further comprising:

[0030] Step 11, determining the time length taken by the sensor to pass through the water body through the first signal and the second signal;

[0031] Step 12, determining the angular velocity of the drum washing machine based on the preset rotation speed, and determining the rotation angle of the drum washing machine in the time length through the angular velocity and the time length;

[0032] In the case of determining the rotation speed and the time length, the rotation angle can be determined by the following formula:

[0033] J=S2*Δt

[0034] Wherein, J is the rotation angle, S2 is the angular velocity, and Δt is the time length taken by the sensor to pass through the water body.

[0035] Step 13, determining the water level height value of the drum washing machine through the drum radius of the drum washing machine and the rotation angle.

[0036] Further, the water level height value can be determined by the following formula:

[0037] h=r-(cosJ / 2)r

[0038] Wherein, the water level height value is h, r is the drum radius of the drum washing machine, and J is the rotation angle.

[0039] It can be seen that, in the embodiment of the present application, the water level value can be calculated by calculation in the case that the time length taken by the sensor to pass through the water body, the preset rotating speed, and the radius of the drum of the drum washing machine are known, that is, there is a corresponding relationship among the time length of the sensor contacting the liquid, the preset rotating speed, and the water level value. Therefore, the corresponding relationship among the time length of the different sensors contacting the liquid, the different preset rotating speeds, and the different water level values can be calculated in advance by the above calculation method, and then the corresponding relationship among the time length of the different sensors contacting the liquid, the different preset rotating speeds, and the different water level values can be obtained in advance. It can be seen that, in the embodiment of the present application, the water level value can be determined by the corresponding relationship preset in advance, or the water level value can be obtained by real-time calculation.

[0040] In an optional embodiment of the embodiment of the present application, as shown in Figure 4 The method of the embodiment of the present application can further include:

[0041] Step 401, determining the distance of the sensor passing through the water body within the time length and the preset rotating speed;

[0042] Step 402, determining the water volume in the drum of the drum washing machine based on the depth, the rotating angle, and the distance of the drum washing machine.

[0043] Further, in an optional embodiment of the embodiment of the present application, the water volume in the drum can be determined by the following formula:

[0044] V=πr2H(L / 2πr)-(cosJ / 2)*(sinJ / 2)r2H

[0045] Wherein, the water volume in the drum is V, r is the radius of the drum of the drum washing machine, H is the depth of the drum washing machine, L is the distance of the sensor passing through the water body, and J is the rotating angle.

[0046] It can be seen that, in the embodiment of the present application, the water volume in the current drum washing machine can be further calculated, so as to further confirm whether the water volume in the current washing machine is appropriate. If it is less, water is continuously added, and if it is more, water is discharged, so as to perform the washing operation after the washing condition is met.

[0047] Further, in an optional embodiment of the embodiment of the present application, the method of the embodiment of the present application can further include:

[0048] Step 21, in the case that the water volume in the drum satisfies the water volume requirement of the current washing work, controlling the drum washing machine to perform the washing operation;

[0049] Step 22, in the case that the water volume in the drum is lower than the water volume requirement of the current washing work, performing the water supplement operation on the drum washing machine.

[0050] Step 23, the water level in the drum washing machine is detected again until the water volume in the barrel meets the water volume requirement for the current washing operation, and then the drum washing machine is controlled to perform the washing operation.

[0051] Step 24: If the water volume in the drum is higher than the water volume required for the current washing operation, the drum washing machine is waterproofed;

[0052] Step 25, detecting the water level in the drum washing machine again, and controlling the drum washing machine to perform the washing operation when the water volume in the barrel meets the water volume requirement for the current washing operation.

[0053] Through the above steps 21 to 25, in the embodiment of the present application, the water volume currently in the washing machine can be measured by the water contact time measured by the sensor, as well as the rotation speed and drum radius of the drum washing machine, and then it can be determined whether the current water volume has reached the washing conditions of the current clothes. If it is less, water must be added; if it is more, water must be drained to achieve the washing conditions before the washing operation is performed.

[0054] The following describes an embodiment of the present application, which provides a liquid level detection method and control method for a washing machine. This method involves mounting a liquid detection sensor, which senses fluid and provides a feedback signal, on the outer wall of the inner drum near the drum opening. The inner drum of the drum washing machine rotates at a preset speed, and the sensor moves with the rotation of the inner drum. When it contacts the liquid, it provides a feedback signal and records the start time stamp. When the sensor leaves the liquid, it provides a feedback signal and records the end time stamp. By calculating the length of time the sensor travels through the liquid and converting it into the corresponding preset speed, the current water level value can be obtained.

[0055] Specific as Figure 5 As shown, the method steps in this specific embodiment include:

[0056] Step 501, weighing the clothes to be washed;

[0057] Step 502: Select a preset water inlet level according to the weighing result, and control the washing machine to arrange water inlet according to the determined preset water inlet level;

[0058] Step 503: The flow meter installed on the water inlet valve simultaneously records the water inflow, which is recorded as A.

[0059] Step 304: Determine whether the water inflow has reached the preset water inflow level. If the water inflow A has not reached the preset water inflow level, continue to arrange water inflow and continue to step 303. If the water inflow A has reached the preset water inflow level, execute step 305.

[0060] Step 505, control the motor of the washing machine to rotate in the preset speed and direction, so that the clothes in the washing machine drum are fully mixed with water;

[0061] Step 506, the liquid detection sensor installed on the outer wall of the inner drum rotates with the rotation of the inner drum and collects data. Assuming that the inner drum rotates clockwise at the preset speed, when the liquid detection sensor contacts the water, the time of the feedback signal is defined as X1;

[0062] Step 507, the drum continues to rotate until it leaves the water, and the time of leaving the water feedback is defined as X2;

[0063] Step 508, by calculation, the time taken by the liquid detection sensor to pass through the water body at the preset speed is obtained△t=X2-X1;

[0064] Step 509, the value of△t is matched or calculated with the pre-stored water level value, and the current water amount B in the drum and the water level height in the drum are obtained;

[0065] For this, in the specific example, as shown in Figure 6 , it is known that the speed of the drum rotation is S1, the corresponding angular velocity is S2, the depth of the drum is H, the radius of the drum is r, X1 is the time when the drum enters the water at the preset speed and direction, X2 is the time when the drum leaves the water at the preset speed and direction, and the time taken to pass through the water body is△t=X2-X1.

[0066] Rotation angle J=S2*△t

[0067] The water level height value h of the drum=r-(cosJ / 2)r

[0068] The distance L taken to pass through the water body=△t*S1

[0069] The water volume V in the drum=πr2H(L / 2πr)-(cosJ / 2)*(sinJ / 2)r2H=π(L / 2πr)-(cosJ / 2)(sinJ / 2).

[0070] Or, as shown in Table 1;

[0071]

[0072] Table 1

[0073] Step 510, confirm whether the water amount B meets the water level requirement of the washing machine for washing work. If it meets, execute step 513; if it does not meet, execute step 511;

[0074] Step 511, perform water replenishment operation;

[0075] Step 512, set C as the water supplement level;

[0076] Step 513, execute the washing operation;

[0077] Step 514, follow the forward and reverse rotation rhythm of the washing to detect the water level.

[0078] The above water supplement operation is to calculate the water amount C that needs to be supplemented. The water amount C that needs to be supplemented is obtained by calculating the difference between the water amount A recorded by the flow meter and the water amount B obtained after the liquid detection sensor works. The water amount C is set as the water supplement level required, the water inlet valve is arranged to supply water, and it is recorded whether the water amount A reaches the water amount C required by the water supplement level. If it does not reach, the water supplement continues. If it reaches, the above liquid detection sensor working process is repeated until the water amount B meets the water level requirement of the washing machine for washing operation.

[0079] It can be seen that through the above steps 501 to 514, the sensor is installed in the gap space between the inner and outer drums. The water in this part fluctuates when the washing drum rotates. Due to the small gap space, the fluctuation space of the horizontal liquid level is very limited, and the horizontal liquid level will be relatively stable. The water wave disturbance caused by the clothes in the drum is difficult to exert a great influence on the space horizontal liquid level in the gap between the inner and outer drums. Based on this premise, the relative position of the sensor entering and leaving the water will be accurate and will not deviate due to the fluctuation of the horizontal liquid level. Compared with the existing pressure liquid level sensor, after the water is fully supplied, the inner drum rotates to mix and wet the clothes, and then it is static for a period of time to confirm the water level, and then it is considered whether water supplement is needed. By using the method of the present application, the liquid level detection is detected synchronously when the inner drum rotates to mix and wet the clothes, and there is no need to be static for a period of time, which saves the washing control time.

[0080] Corresponding to the above Figure 1 The present application also provides a drum washing machine, as shown in Figure 7 The device comprises:

[0081] The first acquisition device 702 is configured to acquire a first signal fed back by the sensor when the drum washing machine rotates at a preset rotating speed. The sensor is arranged at the drum opening position of the outer wall of the inner drum of the drum washing machine. The first signal represents time information when the sensor just contacts the liquid in the drum washing machine.

[0082] The second acquisition device 704 is configured to acquire a second signal fed back by the sensor. The second signal represents time information when the sensor leaves the liquid.

[0083] The first processing module 706 is configured to determine the water level height value of the drum washing machine based on the first signal, the second signal and the preset rotating speed, wherein the preset corresponding relationship exists between the time length of the sensor contacting the liquid determined by the first signal and the second signal, the preset rotating speed and the water level height value.

[0084] Through the drum washing machine in the embodiment of the present application, since the first signal and the second signal are used to indicate the time of the sensor contacting the liquid and the time of the sensor leaving the liquid, that is, the time length of the sensor contacting the liquid can be measured through the first signal and the second signal, and then the corresponding water level height value can be determined through the preset corresponding relationship between the preset rotating speed and the preset, compared with the method of detecting the water level after the drum washing machine is filled with water and then standing for a period of time in the prior art, the efficiency of water level detection is improved, and the sensor is installed in the gap space between the inner drum and the outer drum. The water in this part fluctuates when the washing drum rotates. Since the gap space is small, the fluctuation space of the horizontal liquid surface is very limited, and the horizontal liquid surface is relatively stable. The water wave disturbance caused by the clothes in the drum is mostly affected by the isolation of the inner drum, and it is difficult to exert a great influence on the space horizontal liquid surface between the inner drum and the outer drum. Based on this premise, the relative position of the sensor entering the water and leaving the water is accurate and will not deviate due to the fluctuation of the horizontal liquid surface, and the water level detection is also relatively accurate.

[0085] In the optional implementation in the embodiment of the present application, the first processing module 706 in the embodiment of the present application further includes: a first processing unit configured to determine the time length of the sensor passing through the water body through the first signal and the second signal; a second processing unit configured to determine the angular velocity of the drum washing machine based on the preset rotating speed, and determine the rotation angle of the drum washing machine in the time length through the angular velocity and the time length; and a third processing unit configured to determine the water level height value of the drum washing machine through the drum radius and the rotation angle of the drum washing machine.

[0086] In the optional implementation in the embodiment of the present application, the water level height value can be determined by the following formula:

[0087] h=r-(cosJ / 2)r

[0088] Wherein, the water level height value is h, r is the drum radius of the drum washing machine, and J is the rotation angle.

[0089] In the optional implementation in the embodiment of the present application, the drum washing machine in the embodiment of the present application further includes: a second processing module configured to determine the distance of the sensor passing through the water body in the time length through the time length and the preset rotating speed; and a third processing module configured to determine the water volume in the drum of the drum washing machine based on the depth of the drum washing machine, the rotation angle and the distance.

[0090] In the optional implementation in the embodiment of the present application, the water volume in the drum can be determined by the following formula:

[0091] V = πr2H(L / 2πr)-(cosJ / 2)(sinJ / 2)r2H

[0092] Wherein, the volume of the water in the tub is V, r is the radius of the drum of the drum washing machine, H is the depth of the drum washing machine, L is the distance of the sensor passing through the water body, and J is the rotation angle.

[0093] In an optional implementation of the embodiment of the present application, the drum washing machine in the embodiment of the present application can further include: a control module, configured to control the drum washing machine to perform a washing operation when the volume of the water in the tub meets the water requirement of the current washing operation; a fourth processing module, configured to perform a water supplement operation on the drum washing machine when the volume of the water in the tub is lower than the water requirement of the current washing operation; and a fifth processing module, configured to detect the water level in the drum washing machine again until the volume of the water in the tub meets the water requirement of the current washing operation, and then control the drum washing machine to perform the washing operation.

[0094] In an optional implementation of the embodiment of the present application, the drum washing machine in the embodiment of the present application can further include: a sixth processing module, configured to perform a water prevention operation on the drum washing machine when the volume of the water in the tub is higher than the water requirement of the current washing operation; and a seventh processing module, configured to detect the water level in the drum washing machine again until the volume of the water in the tub meets the water requirement of the current washing operation, and then control the drum washing machine to perform the washing operation.

[0095] As shown in Figure 8 The embodiment of the present application provides an electronic device, which includes a processor 811, a communication interface 812, a memory 813 and a communication bus 814, wherein the processor 811, the communication interface 812 and the memory 813 complete mutual communication through the communication bus 814,

[0096] The memory 813 is used to store a computer program.

[0097] In an embodiment of the present application, the processor 811 is used to execute the program stored in the memory 813, and realizes the water level detection method of the drum washing machine provided by any one of the preceding method embodiments, which also has similar effects, and details are not repeated here.

[0098] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the water level detection method of the drum washing machine provided by any one of the preceding method embodiments.

[0099] The apparatus embodiments described above are only illustrative, and the units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment.

[0100] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, and the computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0101] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically indicated as such. It is also to be understood that additional or alternative steps can be employed.

[0102] The above description is merely illustrative of the application and should not be taken as limiting. Numerous modifications and variations underlying the general principles of the applications can be made by those of ordinary skill in the art without departing from the spirit or scope of the application. Therefore, the application is not to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the water level of a drum washing machine, characterized in that: The method comprises: When the drum washing machine rotates at a preset speed, a first signal fed back by a sensor is obtained, wherein the sensor is disposed at a drum opening on an outer wall of an inner drum of the drum washing machine; the first signal represents time information when the sensor first contacts liquid in the drum washing machine; Acquiring a second signal fed back by the sensor, wherein the second signal represents time information when the sensor leaves the liquid; determining a water level value of the drum washing machine based on the first signal, the second signal, and the preset rotational speed, wherein a predetermined correspondence exists between a time period during which the sensor contacts the liquid determined by the first signal and the second signal, the preset rotational speed, and the water level value; Among them, determining the water level value of the drum washing machine based on the first signal, the second signal and the preset speed includes: determining the time it takes the sensor to pass through the water body through the first signal and the second signal; determining the angular velocity of the drum washing machine based on the preset speed, and determining the rotation angle of the drum washing machine within the time period through the angular velocity and the time period; determining the water level value of the drum washing machine through the drum radius of the drum washing machine and the rotation angle.

2. The method according to claim 1, characterized in that Determining the water level value by the following formula includes: h=r-(cosJ / 2)r Among them, the water level height value is h, r is the drum radius of the drum washing machine, and J is the rotation angle.

3. The method according to claim 1, characterized in that The method further comprises: Determine the distance the sensor travels through the water body within the time period based on the time period and the preset rotation speed; The volume of water in the drum of the drum washing machine is determined based on the depth of the drum washing machine, the rotation angle, and the distance.

4. The method according to claim 3, characterized in that The volume of water in the cylinder is determined by the following formula: V=πr 2 H(L / 2πr)-(cosJ / 2)*(sinJ / 2)r 2 H Among them, the volume of water in the drum is V, r is the drum radius of the drum washing machine, H is the depth of the drum washing machine, L is the distance the sensor travels through the water body, and J is the rotation angle.

5. The method according to claim 3, characterized in that The method further comprises: When the water volume in the drum meets the water volume requirement for the current washing operation, controlling the drum washing machine to perform a washing operation; When the water volume in the drum is lower than the water volume required for the current washing operation, the drum washing machine is replenished with water; The water level in the drum washing machine is detected again until the water volume in the drum meets the water volume requirement for the current washing operation, and then the drum washing machine is controlled to perform the washing operation.

6. The method according to claim 5, characterized in that The method further comprises: When the water volume in the drum is higher than the water volume required for the current washing operation, draining the drum washing machine; The water level in the drum washing machine is detected again until the water volume in the drum meets the water volume requirement for the current washing operation, and then the drum washing machine is controlled to perform the washing operation.

7. A drum washing machine, characterized in that: include: a first acquiring device, configured to acquire a first signal fed back by a sensor when the drum washing machine rotates at a preset speed, wherein the sensor is disposed at a drum opening on an outer wall of an inner drum of the drum washing machine; the first signal representing time information when the sensor first contacts liquid in the drum washing machine; a second acquiring device, configured to acquire a second signal fed back by the sensor, wherein the second signal represents time information when the sensor leaves the liquid; a first processing module, configured to determine a water level value of the drum washing machine based on the first signal, the second signal, and the preset rotational speed, wherein a predetermined correspondence exists between a time period during which the sensor contacts the liquid, as determined by the first signal and the second signal, the preset rotational speed, and the water level value; Among them, the first processing module includes: a first processing unit, used to determine the time it takes for the sensor to pass through the water body through the first signal and the second signal; a second processing unit, used to determine the angular velocity of the drum washing machine based on a preset speed, and determine the rotation angle of the drum washing machine within the time period through the angular velocity and time period; a third processing unit, used to determine the water level height value of the drum washing machine through the drum radius and rotation angle of the drum washing machine.

8. An electronic device comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is configured to execute the water level detection method for the drum washing machine according to any one of claims 1 to 6 of the present application.

9. A computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the water level detection method for a drum washing machine according to any one of claims 1 to 6 of the present application.

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