Intelligent cleaning control method of surface cleaning device

Abstract

The invention discloses an intelligent cleaning control method of a surface cleaning device. The surface cleaning device comprises a ground brush, a machine body, a dirt suction system, a water supply system and a control system, wherein a cleaning roller is mounted at the front end of the ground brush; the machine body is hinged to the ground brush; the floor brush comprises a shell, a scraping assembly is arranged on the shell, and the surface cleaning device at least comprises a standard cleaning mode, wherein the machine body inclines by a certain angle a relative to the horizontal plane, the water supply system supplies water to the cleaning roller or a to-be-cleaned face at a first flow Q1, the cleaning roller rotates at a first rotating speed N1, the scraping assembly scrapes the cleaning roller, and the dirt suction fan works at a first power P1; the method comprises the steps that in a standard cleaning mode, when a control system receives a signal that the inclination angle of a machine body relative to the horizontal plane is smaller than a, the surface cleaning device is controlled to enter a lying cleaning state, a dirt suction fan continues to work at first power P1, and a is smaller than or equal to 25 degrees. By means of the method, the possibility that the dirt suction fan is polluted when the surface cleaning device works in a flat lying mode can be effectively reduced.

Description

Technical Field

[0001] This application belongs to the technical field of surface cleaning devices, and particularly relates to an intelligent cleaning control method for a surface cleaning device. Background Art

[0002] Machines for surface cleaning generally include floor washers, floor sweeping robots, carpet cleaners, mite removers, etc. Generally, machines for surface cleaning include a housing, a sewage suction system, a water supply system, and a cleaning member provided on the housing. Some housings are also provided with a sewage suction port and a scraping member. The sewage suction system includes a sewage suction fan, a sewage storage bucket, and a sewage suction pipe connecting the sewage suction port and the sewage storage bucket. The water supply system supplies water to the surface to be cleaned or the cleaning member. The wetted cleaning member rotates continuously to scrape the surface to be cleaned. The scraping member abuts against the cleaning member to scrape off the dirt or sewage on the cleaning member. The sewage suction fan operates to evacuate the sewage storage bucket and the sewage suction pipe to create a negative pressure inside, so as to suck the sewage or dirt on the surface to be cleaned and the sewage or dirt scraped off from the cleaning member through the sewage suction port to the sewage suction pipe on the sewage storage bucket, and spray out from the pipe orifice of the sewage suction pipe and fall into the sewage storage bucket for storage, thereby cleaning the surface to be cleaned.

[0003] In the industry, for machines used for surface cleaning, it is generally believed that the greater the suction force of the sewage suction fan, the better the sewage suction effect, that is, the greater the power of the sewage suction fan, the better the sewage suction effect. Therefore, generally in the industry, technicians usually set a variety of functions for machines used for surface cleaning, such as floor washers, including a standard cleaning mode and a strong cleaning mode. In the strong cleaning mode of the floor washer, a vacuum fan with a large power and high rotation speed is used for sewage suction work. For example, a vacuum fan with a power of 200w to 250w is selected, expecting that the floor washer can achieve a better suction effect when encountering heavy dirt, a large amount of dirt, or dried stains, and clean the dirt completely. In addition, for the self-cleaning of the cleaning member, generally the floor washer is placed on a base, and the floor brush is placed in the tray of the base, and the body stands upright on the base. In order to completely clean the dirt after cleaning from the base, the maximum power of the vacuum fan is also selected. However, there are the following problems in this process:

[0004] 1) When customers use a floor washer, they generally adjust the body of the floor washer to an inclined state so that it is more comfortable for them to hold the handle on the body with their hands, and it is not too strenuous to pull the body back and forth by holding the handle. At this time, if a vacuum blower with a relatively large power is selected, such as 250w, and the vacuum blower is allowed to work at its maximum power, and under the action of a vacuum blower with such a large suction force, the height of the sewage rising remains unchanged. After the body is inclined at a certain angle, the nozzle of the sewage suction pipe on the sewage bucket is lowered, then there is a possibility that the sewage will rush out of the sewage bucket. If it enters the body, it will contaminate the vacuum blower inside the body. Especially when the inclination angle of the body is relatively large, even when cleaning a relatively low space such as under the bed, the probability of the vacuum blower being contaminated greatly increases. To solve the problem of cleaning the floor in low spaces, in the general industry, the inclination angle of the body less than 25° down to 0° is defined as the flat cleaning state. When the machine is in the flat cleaning state, the power of the vacuum blower is reduced, such as adjusting the power of the vacuum blower from 250w to about 110w, so as to reduce the suction force in order to avoid contaminating the vacuum blower. And sometimes, even if the body is not tilted to this angle when using such a high-power vacuum blower, and the customer pushes the body back and forth, causing the sewage in the sewage bucket to slosh back and forth, there is also a risk that the sewage will rush into the body and contaminate the vacuum blower.

[0005] 2) In real life, the situation of heavy dirt in general households is not common. In most cases, general households often carry out floor cleaning work, and the probability of usually using the strong cleaning mode of the floor washer is not high. Therefore, the maximum power of 250w of the vacuum blower is rarely used. In the standard cleaning mode, the actual working power of the vacuum blower during suction is adjusted by adjusting the duty cycle of the vacuum blower. And the power of the vacuum blower is generally proportional to the volume, resulting in a relatively large space occupied by the vacuum blower. Moreover, the floor washer is generally powered by a battery pack, and the vacuum blower consumes the most power in the floor washer, so the floor washer has to use a battery pack with a relatively large power, which also leads to a relatively large volume of the battery pack, thus making the body of the floor washer heavier and larger and unable to enter low spaces for cleaning, bringing a burden to customers when using it.

[0006] 3) When the floor washer selects a vacuum blower with a relatively large power for sewage suction, a relatively large battery pack power needs to be set to meet the power requirements of the vacuum blower in the standard cleaning mode and the strong cleaning mode. If the battery pack power is set relatively small and the vacuum blower power is relatively large, it will cause the floor washer to run out of power before the surface to be cleaned is completely cleaned. At this time, the water in the clean water tank may not be used up yet, and the customer needs to charge the battery pack, which takes a certain amount of time. However, if the battery pack power is set relatively large, since the user mostly uses the standard cleaning mode when cleaning the surface to be cleaned and rarely needs to use the maximum power of the vacuum blower, when the surface to be cleaned is cleaned, there may still be a lot of remaining power in the battery pack, and there may still be remaining power even after the self-cleaning of the cleaning parts is completed, and no charging is required. Then, if the customer does not charge, it will cause the problem that when the customer uses it next time, the cleaning work is not completed yet, the battery pack suddenly runs out of power, the cleaning work is interrupted, and the machine needs to be charged, waiting for a long charging time, thus bringing trouble to the customer's cleaning work. Moreover, when the battery pack power of the floor washer is set relatively large, if the user charges the floor washer once after cleaning the surface to be cleaned once and after the cleaning parts complete self-cleaning, it will cause the battery pack to be charged when there is still remaining power, resulting in a waste of power. At the same time, for a battery pack with a relatively large power setting, being in a state of "using a big horse to pull a small cart" for a long time is also a waste of resources.

[0007] 4) When the user uses the floor washer to clean the surface to be cleaned, usually the standard cleaning mode is used. If encountering heavy dirt, the floor washer will be switched to the strong cleaning mode. At this time, the control system needs to adjust the power of the vacuum blower to the maximum power of 250W. After the heavy dirt is cleaned, the user may switch the strong cleaning mode back to the standard cleaning mode. At this time, the control system needs to lower the power of the vacuum blower again. Moreover, when the user uses the floor washer to clean low spaces such as under the bed, the control system also needs to reduce the power of the vacuum blower to prevent sewage from entering the body and polluting the vacuum blower. That is, currently, during the use of the floor washer, the control system may need to adjust the power of the vacuum blower multiple times, or the control system needs to switch the floor washer back and forth between the standard cleaning mode and the cleaning mode, resulting in frequent changes in the working state of the floor washer, being unable to perform the cleaning work smoothly, prone to control failure problems, and at the same time making the control logic of the floor washer complex, requiring the deployment of complex control algorithms or control programs. Summary of the Invention

[0008] This application provides an intelligent cleaning control method for a surface cleaning device to solve at least one of the above technical problems.

[0009] The technical solution adopted by this application is as follows:

[0010] An intelligent cleaning control method for a surface cleaning device, the surface cleaning device comprising a floor brush with a cleaning roller mounted at the front end, a fuselage hinged to the floor brush, a dirt suction system having a dirt suction fan, a water supply system, and a control system; the floor brush comprising a housing, and a scraping assembly is further provided on the housing, and the surface cleaning device at least comprises a standard cleaning mode: the fuselage is inclined at a certain angle α with respect to the horizontal plane, the control system receives a startup signal, the water supply system is started, and water is supplied to the cleaning roller or the surface to be cleaned at a first flow rate Q1, the cleaning roller rotates at a first rotational speed N1 to wipe the surface to be cleaned, the scraping assembly scrapes the cleaning roller, and the dirt suction fan operates at a first power P1 to suck away dirt or sewage; the method comprises: in the standard cleaning mode, when the control system receives a signal that the inclination angle of the fuselage with respect to the horizontal plane is less than α, controlling the surface cleaning device to enter a flat cleaning state: the dirt suction fan continues to operate at the first power P1, where α ≤ 25°.

[0011] In this implementation manner, by matching a reasonable working power, water supply flow rate, and rotational speed of the cleaning roller for the vacuum fan in the standard cleaning mode, not only is it possible to maximize the rotational speed of the cleaning roller and the reasonable water supply volume in the standard cleaning mode of the surface cleaning device to cooperate with the operation of the vacuum fan, so that the working power of the vacuum fan meets the suction requirement for general surface cleaning, but also when the surface cleaning device enters the flat cleaning state, the working power of the vacuum fan does not need to be adjusted, and the original reasonable working power can continue to be used, so that whether the surface cleaning device is working with the fuselage inclined or in flat cleaning, sewage will not be pumped out of the sewage bucket, effectively avoiding sewage from entering the fuselage and polluting the vacuum fan, ensuring the safety of the working environment of the vacuum fan, reducing damage to the vacuum fan caused by water ingress, and thus improving the effective working service life of the surface cleaning device; moreover, when the surface cleaning device is in the flat cleaning state, there is no need to switch the working mode or adjust the fan power, which also makes the control program of the surface cleaning device simpler, can smoothly control the working state of the surface cleaning device, and will not cause the working state of the surface cleaning device to change suddenly with the change of working parameters, avoiding problems of excessive sudden change or control failure during the switching process, making the surface cleaning device of the present application work more smoothly and efficiently; at the same time, by cleverly and reasonably designing the working parameters of the surface cleaning device, avoiding the vacuum fan from using a large working power, the surface cleaning device does not need to be equipped with a large-volume vacuum fan and battery pack, enabling the fuselage to be designed to be thinner and lighter, and more convenient for cleaning low-lying floors such as under the bed; and the power of the battery pack can be reasonably designed so that the power of the battery pack can adapt to the power required for the surface cleaning device to complete a cleaning job and self-cleaning, not only achieving energy conservation and environmental protection, but also avoiding charging troubles for users, making the operation of the surface cleaning device more reasonable and intelligent.

[0012] In a possible implementation of the present application, the sewage suction system further includes a sewage tank communicated with the sewage suction fan, and a detection electrode is provided in the sewage tank; the method further includes a first-level liquid full protection step: when the liquid level of the sewage in the sewage tank reaches the sensing end of the detection electrode, and the control system receives a low-level liquid full signal, and the low-level liquid full signal lasts for a first duration T1, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and gives a liquid full alarm; when the surface cleaning device enters the flat cleaning state, the first-level liquid full protection step further includes: after the duration of the low-level liquid full signal is interrupted and then lasts for the first duration T1 again, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and gives a liquid full alarm, where T1′ < 1 / 2T1.

[0013] In this implementation, during the operation of the surface cleaning device, the liquid full detection is performed through the detection electrode in the sewage tank. When the sewage in the sewage tank reaches the sensing end of the detection electrode, due to the conductivity of water, the detection electrode is equivalent to being short-circuited, and the control system receives a low-level liquid full signal. When the low-level liquid full signal lasts for the first duration T1, the control system determines that the liquid is full, controls the surface cleaning device to stop working and gives a liquid full alarm, enabling the user to promptly empty the sewage in the sewage bucket, thereby preventing the sewage from entering the body and contaminating the vacuum fan, so that the surface cleaning device can achieve a good cleaning effect without allowing the sewage to enter the body and contaminate the vacuum fan. After the surface cleaning device enters the flat cleaning state, to prevent the sewage or liquid in the sewage bucket from surging greatly due to the user suddenly pushing or pulling back the body, causing the sewage or liquid to contact the sensing end of the detection electrode, resulting in the control system receiving a low-level liquid full signal and causing a false alarm. Only when the control system first receives a short-time low-level liquid full signal and then receives a low-voltage liquid full signal with a duration reaching T1, a liquid full alarm is given, thereby avoiding false alarms.

[0014] In a possible implementation of the present application, when the surface cleaning device enters the flat cleaning state, the method further includes a second-level liquid full protection step: a surge number threshold n0 is set in the control system. When the number n of times the control system receives a low-level liquid full signal due to the surge of the sewage in the sewage tank satisfies n ≥ n0, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and gives a liquid full alarm.

[0015] In this implementation, when the user uses the surface cleaning device to clean low spaces such as under the bed and under the sofa, the surface cleaning device enters the lying cleaning state. In order to clean these low spaces thoroughly, the user generally drags the surface cleaning device back and forth. This causes the sewage in the sewage bucket to surge during the back-and-forth dragging process. The surging sewage may come into contact with the detection electrode in the sewage bucket, causing the control system to receive a low-level liquid full signal. However, sometimes even a small amount of sewage surging may also come into contact with the detection electrode, and once the sewage touches the detection electrode, a liquid full alarm is triggered, resulting in frequent alarms. This makes the user frequently pour out a small amount of sewage, affecting the user's product experience. Therefore, in this implementation, a surge count threshold n0 is set. Only when the number of times n that the sewage in the sewage bucket comes into contact with the detection electrode due to surging, causing the control system to receive a low-level liquid full signal, satisfies n≥n0, the control system will determine that the liquid is full. At this time, it controls the surface cleaning device to stop working, preventing the sewage in the sewage bucket from entering the body and contaminating the vacuum blower, and issues a liquid full alarm to prompt the user to empty the sewage in time. Thus, it can not only achieve liquid full detection of the sewage in the sewage bucket, reducing the probability of sewage entering the body and contaminating the vacuum blower, but also avoid frequent alarms that would make the user frequently pour out sewage, reducing the user's product experience.

[0016] In a possible implementation of the present application, when the surface cleaning device enters the lying cleaning state, the method further includes a secondary liquid full protection step: a surge duration threshold t1 and an accumulated alarm duration threshold t2 are set in the control system; when the sewage in the sewage tank surges, causing the control system to receive a low-level liquid full signal for a duration t that satisfies t≥t1 max , the alarm duration t0 is accumulated. When t0 satisfies t0≥t2 min , the control system determines that the liquid is full, controls the surface cleaning device to stop working, and issues a liquid full alarm; where T1≥5t1 max .

[0017] In a possible implementation of the present application, the secondary liquid full protection step further includes: when accumulating the alarm duration t0, if the duration t of the low-level liquid full signal received by the control system satisfies t≤t1 min , or, if the duration t′ of the non-receipt of the low-level liquid full signal by the control system satisfies t′≥t2 max , clear and re-accumulate the alarm duration t0.

[0018] In this implementation manner, when the surface cleaning device enters the flat cleaning state, the liquid full detection can also be performed through the duration of the surge. Specifically, when the waste liquid in the waste water bucket surges and contacts the detection electrode, and the duration t of the control system receiving the low-level liquid full signal is greater than or equal to the maximum value of the surge duration threshold t1, it means that the contact duration between the waste liquid in the waste water bucket and the detection electrode is long. At this time, the alarm duration t0 is accumulated. If the accumulated t0 is greater than or equal to the minimum value of the cumulative alarm duration threshold t2, that is, the cumulative alarm duration threshold t2 is reached, the control system determines that the liquid is full at this time, controls the surface cleaning device to stop working and gives a liquid full alarm, so that the user can pour out the waste water in time to avoid the waste water in the waste water bucket from entering the fuselage and polluting the vacuum fan. If during the process of the cumulative alarm duration t0, the duration t of the control system receiving the low-level liquid full signal is less than or equal to the minimum value of the surge duration threshold t1, it means that the waste liquid in the waste water bucket contacts the detection electrode for a short time due to the surge, that is, it means that the amount of waste liquid in the waste water bucket is small. Or, the duration t' of the control system not receiving the low-level liquid full signal is greater than or equal to the maximum value of the cumulative alarm duration t2, that is, it means that the waste liquid in the waste water bucket does not contact the detection electrode for a long time, or there is a period of time when the waste liquid in the waste water bucket cannot contact the detection electrode even during the surge, resulting in the control system not receiving the low-level liquid full signal, that is, it means that the amount of waste liquid in the waste water bucket is small. At this time, the cumulative alarm duration t0 is cleared and the timing is restarted, so that the surface cleaning device can also detect the waste liquid in the waste water bucket through the liquid full protection step when in the flat working state, give a liquid full alarm when the amount of waste liquid is large, and enable the user to pour out the waste water in time, thus avoiding the waste liquid in the waste water bucket from entering the fuselage and polluting the vacuum fan, but not giving a frequent alarm due to the waste liquid in the waste water bucket surging and contacting the detection electrode, so that when the user cleans low spaces such as under the bed and under the sofa, the cleaning process is frequently interrupted to pour out the waste water, which brings a bad cleaning experience to the user. That is, when the surface cleaning device in this embodiment is in the flat cleaning state, it can not only achieve an efficient and smooth cleaning process but also prevent waste water or waste liquid from entering the fuselage and polluting the vacuum fan.

[0019] In a possible implementation manner of the present application, after the surface cleaning device enters the flat cleaning state, the control system controls the water supply system to continue supplying water to the cleaning roller or the surface to be cleaned at a flow rate not greater than the first flow rate Q1, and controls the cleaning roller to continue rotating at the second rotation speed N2, where N2≥N1.

[0020] In this implementation mode, generally, there is more dust on the ground under the bed, cabinet and sofa, and there is little accumulated water, dried stains or heavy dirt. Therefore, after entering the flat cleaning state, the water supply is not increased, and the rotation speed of the cleaning roller is controlled to remain unchanged or increased, so that the dust can be easily wiped clean by the cleaning roller. At a relatively high rotation speed of the cleaning roller, the scraped dirt or liquid is thrown to the sewage suction port along with the movement of the cleaning roller. Without increasing the power of the sewage suction fan, not only the probability of the sewage suction fan pumping the liquid into the body of the machine from the sewage bucket is avoided, but also, with a high rotation speed of the cleaning roller, the centrifugal force on the dirt or liquid is increased, thus better assisting the sewage suction fan to pump the liquid or dirt into the sewage bucket without polluting the vacuum fan.

[0021] In a possible implementation mode of the present application, the surface cleaning device further includes a strong cleaning mode: the control system receives a startup signal, and the water supply system supplies water to the cleaning roller or the surface to be cleaned at a second flow rate Q2, where Q1 < Q2 ≤ 2Q1, the cleaning roller rotates at a second rotation speed N2, where N1 ≤ N2 ≤ 1.2N1, and the sewage suction fan operates at a second power P2, where 1.7P1 ≤ P2 ≤ 2P1; when the surface cleaning device enters the flat cleaning state in the strong cleaning mode, the control system controls the water supply system, the cleaning roller and the sewage suction fan to adjust to the working parameters in the standard cleaning mode.

[0022] In this implementation mode, the maximum power of the vacuum fan, the rotation speed of the cleaning roller and the water supply of the water supply system are reasonably utilized, that is, the maximum power of the vacuum fan is set within a reasonable range, ensuring the treatment effect of heavy dirt. Even when dealing with heavy dirt in a low space, a good cleaning effect can still be ensured. Because when the surface cleaning device is in the flat cleaning state, the nozzle of the sewage suction pipe and the lower port of the sewage suction pipe are in the same plane, that is, both are at a height close to the surface to be cleaned. As long as the vacuum fan can suck the liquid or dirt to the lower port of the sewage suction pipe that enters the sewage bucket, it can enter the sewage suction pipe. At the same time, using gravity and inertia, the liquid and dirt can flow out from the nozzle of the sewage suction pipe, and a large suction force is not required, that is, the vacuum fan does not need such a large working power to pump the liquid or dirt into the sewage bucket. Therefore, controlling the working parameters of the surface cleaning device to enter the standard cleaning mode can well complete the cleaning work in the flat state of the body, and the working power of the vacuum fan will not be too large to cause the sewage or liquid to rush into the body, avoiding polluting the vacuum fan. At the same time, the energy of the vacuum fan is also better utilized without waste. The strong cleaning mode uses the maximum working power of the vacuum fan, which not only meets the cleaning requirements of heavy dirt, but when the body is in the flat state, adjusting the working power of the vacuum fan to the optimal working parameters in the standard cleaning mode will not cause the vacuum fan to be in a long-term overworking state of a small horse pulling a big cart. Therefore, the effective service life of the vacuum fan can be extended.

[0023] In a possible implementation of the present application, the surface cleaning device further includes a water absorption cleaning mode: when the control system receives a startup signal, the water supply system supplies water to the cleaning roller or the surface to be cleaned at a third flow rate Q3 every second time period T2 for a third time period T3, where Q2 < Q3 ≤ 6Q1 and T2 ≥ 9T3. The cleaning roller rotates at a first rotational speed N1, and the dirt suction fan operates at a second power P2, where 1.7P1 ≤ P2 ≤ 2P1; when the surface cleaning device enters the lying cleaning state in the water absorption cleaning mode, the control system controls the water supply system, the cleaning roller, and the dirt suction fan to adjust to the operating parameters in the standard cleaning mode.

[0024] In this implementation, the purpose of the water absorption cleaning mode is to handle the state where there is a large area of accumulated water or liquid dirt such as soy sauce on the surface to be cleaned. At this time, it is not necessary for the cleaning roller to be wet, but it is necessary for the cleaning roller to rotate to better collect these liquid dirt. Therefore, the water supply system intermittently supplies water every second time period T2, aiming to flush and clean the dirt adhered to the cleaning roller, so as to facilitate the cleaning roller to continue to absorb and collect the dirt accumulated on the ground until it is completely sucked out and the surface to be cleaned is wiped clean. At the same time, when the user uses the water absorption cleaning mode of the surface cleaning device, there is relatively more dirt on the surface to be cleaned. If the power of the vacuum fan is too large, it is easier for the dirt to enter the body and contaminate the vacuum fan. Especially when the body is in the lying cleaning state, the nozzle of the dirt suction pipe and the lower port of the dirt suction pipe are almost at the same height as the surface to be cleaned. If the power of the vacuum fan is too large, the probability of the dirty liquid flushing into the body and contaminating the vacuum fan will be greater. Therefore, appropriately increasing the working power of the vacuum fan in the water absorption cleaning mode can facilitate the quick collection and cleaning of the dirty liquid without allowing the dirty liquid to enter the body and contaminate the vacuum fan. When the machine is in the lying cleaning state, the working parameters are adjusted to the working parameters in the standard cleaning mode. The vacuum fan does not require such a large suction force to collect the dirty liquid or dirt into the lower port of the dirt suction pipe, and then enter the dirt suction pipe and finally fall into the sewage bucket. By adjusting the water supply volume of the water supply system to the water supply volume in the standard cleaning model, less water is sprayed on the cleaning roller or the surface to be cleaned. While ensuring that the dirt on the cleaning roller or the surface to be cleaned is cleaned, the amount of sewage sucked into the sewage bucket by the vacuum fan can be reduced. At the same time, the cleaning roller rotates at the first rotational speed, and the rotational speed is not too fast, which can also reduce the amount of sewage scraped off the cleaning roller by the scraping member, thereby further reducing the amount of sewage sucked into the sewage bucket by the vacuum fan, so that the surface cleaning device can ensure the cleaning effect while preventing the sewage or dirty liquid from entering the body and contaminating the vacuum fan.

[0025] In a possible implementation of the present application, after the control system of the surface cleaning device receives a startup signal, it further includes a cleaning roller wetting step: the water supply system supplies water to the cleaning roller or the surface to be cleaned at a third flow rate Q3 for a third time period T3, where 5Q1 ≤ Q3 ≤ 6Q1.

[0026] In this implementation mode, after the surface cleaning device is powered on, the cleaning roller is in a relatively dry state. When directly wiping the surface to be cleaned, the wiping effect is not good, and some dirt cannot even be wiped off, resulting in poor cleaning effect of the surface cleaning device. Therefore, after powering on, an infiltration step is set, and the water supply system supplies water to the cleaning roller or the surface to be cleaned with a relatively large water supply for a period of time, so that the roller brush is quickly infiltrated, and thus the dirt is easier to be wiped clean after being wetted, especially for the treatment of dried stains, ensuring the cleaning effect of the surface cleaning device.

[0027] In a possible implementation mode of the present application, after the surface cleaning device enters the flat cleaning state, switching to the strong cleaning mode or the water absorption cleaning mode is prohibited.

[0028] In this implementation mode, when the surface cleaning device is in the flat cleaning state, the nozzle and the lower port of the sewage suction pipe are in a state almost close to the plane of the surface to be cleaned. At this time, the vacuum fan does not need such a large suction force to collect sewage or liquid waste into the sewage bucket. In the strong cleaning mode or the water absorption cleaning mode, the working power of the vacuum fan is greater than that of the standard cleaning mode used in the flat cleaning state. In this way, the probability of the vacuum fan sucking sewage or liquid waste into the fuselage is increased. At the same time, in the strong cleaning mode, the rotation speed of the cleaning roller is faster and the water supply of the water supply system is more, so that the amount of sewage or liquid waste sucked by the vacuum fan into the sewage bucket will also be more, which will also increase the risk of the vacuum fan being contaminated by water. Therefore, when the machine is in the flat state, switching to the strong cleaning mode or the water absorption cleaning mode is prohibited, effectively avoiding the contamination of the vacuum fan by water. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0030] Figure 1 is a flowchart of an intelligent cleaning control method for a surface cleaning device;

[0031] Figure 2 is a schematic diagram of the inclined cleaning state of a surface cleaning device;

[0032] Figure 3 is a schematic diagram of the flat cleaning state of a surface cleaning device;

[0033] Figure 4 is another schematic diagram of the inclined cleaning state of a surface cleaning device;

[0034] Figure 5 is another schematic diagram of the flat cleaning state of a surface cleaning device;

[0035] Figure 6 Schematic diagram of the level state for liquid full alarm in the flat cleaning state;

[0036] Figure 7 Schematic diagram of the liquid full alarm process. Detailed implementation manners

[0037] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0038] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0039] In addition, in the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0040] In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "implementation manner", "embodiment", "an embodiment", "example", or "specific example" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] As a surface cleaning device in the present application, such as Figures 2 to 3As shown, it includes a body 100, a floor brush 200 hinged to the body 100, a control system (not shown in the figure), a sewage suction system (not shown in the figure), and a water supply system (not shown in the figure); the floor brush 200 is provided with a cleaning component 600, a water spraying port (not shown in the figure), a scraping strip (not shown in the figure), and a sewage suction port (not shown in the figure), the sewage suction system includes a sewage suction fan 500, a sewage bucket 300, and a sewage suction pipe (not shown in the figure) connecting the sewage suction port and the sewage bucket 300, the water supply system includes a fresh water tank 400 and a water pump (not shown in the figure) that supplies the fresh water in the fresh water tank 400 to the cleaning component 600 or the surface to be cleaned through the water spraying port, and the working modes of the surface cleaning device are written in the control system, and the working modes at least include any one or more of a standard cleaning mode, a strong cleaning mode, and a water absorption cleaning mode. The sewage bucket 300, the fresh water tank 400, and the sewage suction fan 500 of such a surface cleaning device are arranged on the body 100, making the body 100 relatively thick and thick, and when the surface cleaning device is in a lying state, it cannot be very close to the surface to be cleaned. When the user uses such a surface cleaning device to clean low spaces such as under the bed and under the sofa, it can only enter relatively higher low spaces, and it cannot enter low spaces with a very small height between it and the surface to be cleaned, so that the low spaces that such a surface cleaning device can enter are limited.

[0043] As another surface cleaning device in the present application, as Figures 4 - 5 shown, it includes a body 100, a floor brush 200 hinged to the body 100, a control system (not shown in the figure), a sewage suction system (not shown in the figure), and a water supply system (not shown in the figure); the floor brush 200 is provided with a cleaning component 600, a water spraying port (not shown in the figure), a scraping strip (not shown in the figure), and a sewage suction port (not shown in the figure), the sewage suction system includes a sewage suction fan (not shown in the figure), a sewage bucket 300, and a sewage suction pipe (not shown in the figure) connecting the sewage suction port and the sewage bucket 300, the water supply system includes a fresh water tank (not shown in the figure) and a water pump (not shown in the figure) that supplies the fresh water in the fresh water tank to the cleaning component 600 or the surface to be cleaned through the water spraying port, and the working modes of the surface cleaning device are written in the control system, and the working modes at least include any one or more of a standard cleaning mode, a strong cleaning mode, and a water absorption cleaning mode. The sewage bucket 300 of such a surface cleaning device is arranged on the body 100, and the fresh water tank is arranged in the floor brush 200, making the body 100 thinner and lighter, and even close to the thickness of the floor brush 200. Thus, when the user uses such a surface cleaning device to clean low spaces such as under the bed and under the sofa, the angle between the surface cleaning device and the surface to be cleaned can be smaller, and even close to 0 degrees, so that it can enter a lower space for cleaning.

[0044] But as Figures 2 - 5The two surface cleaning devices shown only differ in the installation position of the water tank, resulting in different device structures. Their working principles are the same or similar, and both are applicable to the intelligent cleaning control method proposed in this application.

[0045] When the user uses the surface cleaning device in this application to clean the surface to be cleaned, first press or click the power-on button. The control system receives the power-on signal. If the control system receives the power-on signal when the surface cleaning device is in the sleep mode, it controls the surface cleaning device to continue entering the cleaning mode before sleep. If the control system receives the first power-on signal, it waits for the user to select a cleaning mode. At this time, the user can select one of the standard cleaning mode, the strong cleaning mode, or the water absorption cleaning mode. After the user selects, the control system starts the surface cleaning device according to the control logic or control parameters in the selected mode. At this time, the user adjusts the body of the surface cleaning device to a comfortable angle. Here, corresponding to different user heights, the adjusted angles are different, but generally within the range of 30-80 degrees, so that the surface cleaning device is in an inclined cleaning state as shown in Figure 2 or Figure 4 and starts to clean the surface to be cleaned. If the user wants to clean the surface to be cleaned in low spaces such as under the bed or under the sofa during the cleaning process, the body will be laid flat so that the body is in a lying cleaning state as shown in Figure 3 or Figure 5 shown, which is convenient for the surface cleaning device to enter the low space for cleaning.

[0046] During the cleaning process, the control system of the surface cleaning device controls the water supply system to supply water to the cleaning roller or the surface to be cleaned through the water spray port, controls the cleaning roller to rotate to clean the surface to be cleaned, the scraping member continuously scrapes the rotating cleaning roller, scrapes off the sewage or dirt on the cleaning roller, the sewage suction fan sucks the air in the sewage bucket and the sewage suction pipe, forms a negative pressure in the sewage bucket and the sewage suction pipe, so that the scraped sewage or dirt and the sewage or dirt on the surface to be cleaned enter the sewage suction pipe through the sewage suction port and thus fall into the sewage bucket.

[0047] In a possible implementation manner, in order to ensure the cleaning effect on the surface to be cleaned, before the surface cleaning device starts cleaning, there will be a cleaning roller wetting step. The water supply system supplies water to the cleaning roller or the surface to be cleaned at a water supply rate of 120 g / min for 20 s to wet the hair clusters on the cleaning roller, making it easier to clean the dirt on the surface to be cleaned.

[0048] Furthermore, a heating member that floats relative to the brush housing of the cleaning roller floor brush is provided on the housing of the cleaning roller floor brush. At least part of the surface of the heating member is in contact with the cleaning roller. Thus, the aforementioned cleaning roller wetting step further includes: starting the heating member to heat the hair clusters of the cleaning roller and the water contained therein, so that the cleaning effect on the dirt on the surface to be cleaned is better.

[0049] In order to more clearly illustrate the intelligent cleaning control method of the surface cleaning device of the present application, the following will be described in detail by way of example in conjunction with the accompanying drawings of the specification.

[0050] Embodiment 1

[0051] When the user uses the surface cleaning device to clean the surface to be cleaned, first click or press the power-on button. If the machine is awakened from the sleep state and was in the standard cleaning mode before going to sleep, then after being awakened, the machine directly enters the standard cleaning mode. If the machine is powered on for the first time, it will wait for the user to select or set the cleaning mode. Generally, when the user uses the surface cleaning device to clean the floors of the living room, bedroom, etc., the standard cleaning mode of the surface cleaning device is selected. After the user has completed the selection, the surface cleaning device starts to work. The user drags the surface cleaning device to clean the surface to be cleaned through the handle on the surface cleaning device, and at the same time adjusts the body of the surface cleaning device to a comfortable angle, so that the surface cleaning device is in an inclined cleaning state.

[0052] During the operation of the surface cleaning device in the standard cleaning mode, the surface cleaning device is in an inclined cleaning state as shown in Figure 2 or Figure 4 There is a certain angle a between the body and the surface to be cleaned. This angle is generally 30 - 80 degrees and varies according to the user's height, which can enable the user to drag the surface cleaning device more comfortably and make the user's cleaning work less laborious; after the control system receives the power-on signal, the water supply system starts and supplies water to the surface to be cleaned or the cleaning roller at a first flow rate Q1 preferably 20 - 40 g / min. The cleaning roller rotates at a first rotational speed N1 preferably 250 - 500 rpm. The scraping member continuously scrapes the sewage or liquid on the rotating cleaning roller. The sewage suction fan works at a first power P1 preferably 55 W to suck away the sewage or liquid on the cleaning roller and the sewage or liquid on the surface to be cleaned and collect it in the sewage bucket.

[0053] To avoid excessive sewage or waste liquid in the sewage bucket, when the liquid level of the sewage or waste liquid is high, it is easy to enter the fuselage and contaminate the sewage suction fan, affecting the safe working environment and service life of the sewage suction fan. Therefore, during the operation of the surface cleaning device, a primary liquid full protection step is initiated. Specifically, a detection electrode is provided in the sewage bucket. One end of the detection electrode extending into the sewage bucket has an exposed induction end. The detection electrode is generally two electrodes with a certain spacing in the direction parallel to the ground, forming a set of electrodes. This set of electrodes is connected to a voltage sampling circuit, and the voltage sampling circuit is connected to the control system so that the control system can receive the liquid full signal. When the user starts to clean the surface to be cleaned using the surface cleaning device, the liquid level of the sewage or waste liquid in the sewage bucket is low. At this time, the induction ends of the two detection electrodes cannot make contact, which is equivalent to an open circuit state. At this time, the voltage value collected by the voltage sampling circuit is high, and the control system will receive a high-level voltage signal. As the cleaning process continues, the liquid level of the sewage or waste liquid in the sewage bucket continuously rises. When the height of the sewage or waste liquid rises to a certain extent and touches the induction end of the detection electrode, due to the conductivity of water, the two detection electrodes will conduct to form a circuit. Also, because the resistance of the sewage is large and the voltage division is more, the voltage value detected by the voltage sampling circuit is low. At this time, the control system receives a low-level liquid full signal. Since the user will drag the machine back and forth when using the surface cleaning device, this causes the sewage or waste liquid in the sewage bucket to shake back and forth. When the shaking degree is large, the sewage or waste liquid may touch the induction end of the detection electrode, causing the two detection electrodes to conduct. At this time, the control system will also receive a low-level liquid full signal. However, if a liquid full alarm is issued in this case, the user will interrupt the cleaning process and pour out less sewage, giving the user a bad experience. Therefore, in this application, when the time of the liquid full signal received by the control system reaches the first duration T1, the first duration T1 is preferably 100 ms here, that is, when the sewage or waste liquid in the sewage bucket causes the detection electrode to conduct for a long time, this represents that the sewage bucket reaches the true liquid full state, and a liquid full alarm is issued to control the surface cleaning device to stop working to avoid the sewage or waste liquid entering the fuselage and contaminating the sewage suction fan when the liquid level of the sewage or waste liquid is relatively high. Thus, in the cleaning process of using the standard cleaning mode in this application, both the cleaning effect can be ensured and the sewage or waste liquid will not enter the fuselage to contaminate the sewage suction fan. But if during the timing of the low-level liquid full signal, that is, during the timing of the first duration T1, the control system receives a high-level signal, and this high-level signal lasts for 50 ms or more, it represents that the liquid level of the sewage or waste liquid in the sewage bucket cannot reach the induction end of the detection electrode for a period of time. At this time, the timing is cleared and the liquid full alarm is cancelled.

[0054] Such as Figure 1As shown in step 101, during the operation of the surface cleaning device in the standard cleaning mode, if the user wants to clean low spaces such as under the bed or under the sofa, the body will be laid flat so that the floor brush of the surface cleaning device can enter the low space for cleaning. At this time, the angle detection instrument installed on the floor brush or at the hinge between the floor brush and the body will detect that the inclination angle between the body and the surface to be cleaned is less than a, where a ≤ 25°. At this time, the control system will automatically control the surface cleaning device to enter the lying cleaning state as shown in Figure 3 or Figure 5 . The angle b between the body and the surface to be cleaned in Figure 3 is generally 10 - 20 degrees. Alternatively, when the user wants to clean low spaces such as under the bed or under the sofa, the user can also manually set the surface cleaning device to enter the lying cleaning state. Of course, after the user manually sets to enter the lying cleaning state, if the aforementioned angle detector does not detect that the angle between the body and the surface to be cleaned is less than 25° within a certain period of time after the user's setting, then the control system will control the surface cleaning device to exit the lying cleaning state and prompt the user to re-select the cleaning mode or restore to the cleaning mode used before the user's selection to avoid the user's misselection or accidental touch of the button from affecting the normal cleaning process of the user.

[0055] After the surface cleaning device enters the lying cleaning state, the sewage suction fan continues to operate at the first power P1, preferably 55W. That is, there is no need to reduce the power of the sewage suction fan during this process. This is because a reasonable working power, cleaning roller speed, and water supply flow are matched for the sewage suction fan in the standard cleaning mode, so that the surface cleaning device in the standard cleaning mode achieves the cleaning strength for general dirty surfaces, and the sewage suction fan meets the suction requirement for general surface cleaning. It will neither cause the rising height of the sucked sewage or liquid to be too high due to the excessive power of the sewage suction fan, thus having the risk of entering the body and contaminating the sewage suction fan, nor will the power of the sewage suction fan be too small resulting in poor suction effect. Therefore, when the surface cleaning device is in the lying cleaning state, the working power of the sewage suction fan can be not adjusted and the original reasonable working power can be used, which can not only ensure the cleaning effect but also prevent the sewage or liquid from being pumped out of the sewage bucket, thus ensuring the safety of the working environment of the sewage suction fan.

[0056] Further, generally, there is more dust on the ground under the bed, cabinet, and sofa, and there is little accumulated water, dried stains, or heavy dirt. Therefore, after the surface cleaning device enters the flat cleaning state, the water supply is not increased. Preferably, the water is continuously supplied to the surface to be cleaned or the cleaning roller at a flow rate not greater than 20 g / min. At the same time, the rotation speed of the cleaning roller is controlled to remain unchanged and continue to rotate at the first rotation speed N1, preferably at a rotation speed of 250 - 500 rpm, or the rotation speed of the cleaning roller is appropriately increased to 600 rpm for operation, which facilitates wiping the dust clean by the cleaning roller. At a relatively high rotation speed of the cleaning roller, the scraped dirt or liquid is thrown to the sewage suction port following the movement of the cleaning roller. Without increasing the power of the sewage suction fan, not only is the probability of the sewage suction fan pumping the liquid into the sewage bucket and then into the body avoided, but also, since the rotation speed of the cleaning roller is high, the centrifugal force on the dirt or liquid is increased, thus better assisting the sewage suction fan in pumping the liquid or dirt into the sewage bucket without polluting the vacuum fan.

[0057] When the surface cleaning device is in the flat cleaning state, in order to ensure that the sewage or liquid pumped into by the sewage suction fan does not enter the body and prevent the sewage or liquid from polluting the sewage suction fan, a secondary liquid full protection step will be enabled. The secondary liquid full protection step has the following three implementation methods:

[0058] Mode 1: When the user lies flat and uses the surface cleaning device, the sewage or liquid in the sewage bucket will surge due to the dragging of the user. The surging sewage may contact the sensing end of the detection electrode in the sewage bucket, so that the control system receives a low-level liquid full signal. However, sometimes when less sewage generates a large surge, it may also contact the detection electrode. Once the sewage contacts the detection electrode, a liquid full alarm will be triggered, resulting in frequent alarms. The user will frequently pour out less sewage, affecting the user's product experience. Therefore, in this mode, a surge count threshold n0 is set. Only when the number of times n that the sewage in the sewage bucket contacts the sensing end of the detection electrode due to surging and the control system receives a low-level liquid full signal is n≥n0, the control system will determine that the liquid is full. At this time, the control surface cleaning device stops working to prevent the sewage in the sewage bucket from entering the fuselage and polluting the vacuum fan, and issues a liquid full alarm to prompt the user to pour out the sewage in time. Thus, it can not only achieve the liquid full detection of the sewage in the sewage bucket, reduce the probability of sewage entering the fuselage and polluting the vacuum fan, but also avoid frequent alarms that cause the user to frequently pour out sewage and reduce the user's product experience. At the same time, by setting the surge count threshold, it can also prevent the fuselage from being contaminated by water entering the sewage suction fan at another level. That is, when the sewage or liquid in the sewage bucket frequently contacts the sensing end of the detection electrode due to surging, that is, the sewage or liquid reaches the upper part of the sewage bucket multiple times. At this time, the risk of sewage or liquid entering the fuselage increases. Therefore, by setting the surge count threshold, when the number of times that the sewage or liquid in the sewage bucket surges and reaches the sensing end of the detection electrode is too large, a liquid full alarm is issued, and the control surface cleaning device stops working, playing a role in surge protection and reducing the probability of surging sewage or liquid entering the fuselage and polluting the sewage suction fan.

[0059] Mode 2: Similar to the first-level liquid full protection step, it is judged whether the liquid is full by the duration of the low-level liquid full signal received by the control system. However, when the surface cleaning device is in the flat cleaning state, the sewage in the sewage bucket is more likely to surge or fluctuate and is more likely to contact the sensing end of the detection electrode. Therefore, in order to prevent the user from suddenly pushing or pulling back the machine, resulting in the sewage or liquid in the sewage tank rising first and then falling due to inertia, thus contacting the sensing end of the detection electrode and causing the control system to receive a low-level liquid full signal and trigger a false alarm. Therefore, before the duration of the low-level liquid full signal reaches the first duration, preferably 100ms, for an alarm to be triggered, it is required that there must be one or more low-level surge levels from 20ms to 80ms, otherwise no alarm will be triggered. This indicates that the level of the sewage or liquid in the sewage bucket gradually rises to the position of the sensing end of the detection electrode, rather than the violent fluctuation of the sewage caused by suddenly pushing or pulling back the machine.

[0060] That is, such as Figure 6As shown, in this mode, when the surface cleaning device is in the flat cleaning state, if the control system receives a low-level liquid full signal with a continuous duration reaching 100 ms alone, no alarm will be given. Only when one or more low-level liquid full signals with a relatively short duration, such as 30 ms, are detected first, and then a low-level liquid full signal with a continuous duration reaching 100 ms is received, will a liquid full alarm be given at this time, and the surface cleaning state will be controlled to stop working. Thus, while realizing liquid full detection and effectively preventing sewage or waste liquid in the sewage bucket from entering the fuselage and polluting the sewage suction fan, it will not cause false alarms due to the user suddenly pushing or pulling back the fuselage, which affects the user's cleaning process.

[0061] Method 3: When the surface cleaning device enters the flat cleaning state, since the user's back-and-forth pushing of the fuselage will cause surges in the sewage or waste liquid in the sewage bucket, liquid full detection can also be performed through the duration of the surges. Specifically, a cumulative alarm duration threshold t2 is set in the control system, where t2 ranges from 2.5 s to 5 s, and a surge duration threshold t1 is set, where t1 ranges from 10 ms to 20 ms. As Figure 6As shown, when the sewage or waste liquid in the sewage bucket surges and contacts the induction end of the detection electrode, causing the control system to receive a low-level liquid full signal with a continuous duration t greater than or equal to 20 ms, it means that the contact duration between the waste liquid in the sewage bucket and the induction end of the detection electrode is relatively long. At this time, the accumulation of the alarm duration t0 starts. If the accumulated t0 is greater than or equal to 2.5 s, that is, it reaches the lower limit of the cumulative alarm duration threshold t2. At this time, the control system determines that the liquid is full, controls the surface cleaning device to stop working and gives a liquid full alarm, so that the user can pour out the sewage in time to prevent the sewage in the sewage bucket from entering the fuselage and polluting the vacuum fan. If during the process of accumulating the alarm duration t0, the duration t of the control system receiving the low-level liquid full signal is less than or equal to 10 ms, it means that the waste liquid in the sewage bucket contacts the detection electrode for a short time due to surging, that is, it indicates that the amount of waste liquid in the sewage bucket is small. Or, if the control system does not receive the continuous duration t' of the low-level liquid full signal, that is, the time t' of receiving the high-level signal is greater than or equal to 5 s, it also means that the waste liquid in the sewage bucket does not contact the detection electrode for a long time, or even when the waste liquid in the sewage bucket surges, there is a period of time when it cannot contact the detection electrode and the control system cannot receive the low-level liquid full signal, which also means that the amount of waste liquid in the sewage bucket is small. At this time, the cumulative alarm duration t0 is cleared and the timing is restarted, so that the surface cleaning device can also detect the waste liquid in the sewage bucket through the liquid full protection step when it is in the lying working state, give a liquid full alarm when the amount of waste liquid is large, enable the user to pour out the sewage in time, thus preventing the waste liquid in the sewage bucket from entering the fuselage and polluting the vacuum fan, but it will not give frequent alarms due to the surging of the waste liquid in the sewage bucket contacting the detection electrode, so that when the user cleans low spaces such as under the bed and under the sofa, the cleaning process is frequently interrupted to pour out the sewage, bringing a bad cleaning experience to the user.

[0062] In one example, among the above three methods, for the control system to receive a low-level liquid full signal, it can be that the voltage sampling circuit samples a level lower than 1.3 V, and for the control system to receive a high-level liquid full signal, it can be that the voltage sampling circuit samples a level higher than 5 V. At the same time, it should also be noted that when the surface cleaning device is in the lying cleaning state, the activated secondary liquid full protection step can be one or two or three of the above three methods.

[0063] That is, the surface cleaning device in this embodiment matches a reasonable working power, water supply flow rate, and rotation speed of the cleaning roller for the dirt suction fan in the standard cleaning mode, so that the working power of the dirt suction fan meets the suction requirement for general surface cleaning. Moreover, when the surface cleaning device enters the flat cleaning state, the working power of the vacuum fan does not need to be adjusted, and the original reasonable working power can be continued to be used. Whether the surface cleaning device is working with the body tilted or in the flat cleaning state, sewage will not be pumped out of the sewage bucket. At the same time, by enabling the first-level liquid full protection step and the second-level liquid full protection step, real-time monitoring of the sewage level in the sewage bucket during the working process of the surface cleaning device is achieved. When there is a risk of sewage or dirty liquid entering the body, a liquid full alarm is given in a timely manner and the surface cleaning device is controlled to stop working, thus effectively preventing sewage from entering the body and polluting the vacuum fan, ensuring the safety of the working environment of the vacuum fan, reducing the damage of the vacuum fan caused by water ingress, and improving the effective working service life of the surface cleaning device. The surface cleaning device in this embodiment can not only achieve an efficient and smooth cleaning process, but also prevent sewage or dirty liquid from entering the body and polluting the vacuum fan.

[0064] Embodiment 2

[0065] When the user uses the surface cleaning device to clean heavy dirt on the cleaning surfaces such as the living room and bedroom, the strong cleaning mode is generally selected. When the surface cleaning device enters the strong cleaning mode, it can be that the user discovers a piece of heavy dirt or dry stain on the ground such as in the living room or bedroom, and directly selects the strong cleaning mode after turning on the surface cleaning device. It can also be that during the process of the user using the standard cleaning mode to clean the surface to be cleaned, when encountering heavy dirt, the standard cleaning mode is switched to the strong cleaning mode.

[0066] After the surface cleaning device enters the strong cleaning mode, the water supply system supplies water to the cleaning roller or the surface to be cleaned at a second flow rate Q2, where Q1 < Q2 ≤ 2Q1, preferably 40 - 50 g / min. The cleaning roller rotates at a second rotation speed N2, where N1 ≤ N2 ≤ 1.2N1, preferably at a rotation speed of 600 rpm. The scraping member continuously scrapes the sewage or dirty liquid on the cleaning roller. The dirt suction fan works at a second power P2, where 1.7P1 ≤ P2 ≤ 2P1, preferably 95 w or 110 w, to suck away the sewage or dirty liquid on the cleaning roller and the sewage or dirty liquid on the surface to be cleaned. In this mode, the water supply flow rate of the water supply system is larger to facilitate wetting the heavy dirt or dry stain on the surface to be cleaned sufficiently, making it easier to be cleaned. The rotation speed of the cleaning roller is higher, and at the same time, the power of the dirt suction fan is adjusted to the maximum power of 95 w or 110 w to ensure the cleaning effect of heavy dirt.

[0067] It should be noted that when the user uses the strong cleaning mode of the surface cleaning device, in order to prevent the sewage or liquid sucked by the sewage suction fan from entering the body and contaminating the sewage suction fan, a primary liquid full protection mechanism is also enabled. The primary protection mechanism here is the same as or similar to the primary protection mechanism in Embodiment 1. That is, when the sewage or liquid in the sewage bucket contacts the sensing end of the detection electrode, a circuit is formed between the detection electrodes, and the control system receives a low-level liquid full signal. When the duration of the liquid full signal reaches the first duration T1, preferably 100 ms, the control system issues a liquid full alarm and controls the surface cleaning device to stop working, so that the surface cleaning device in this application can not only ensure the cleaning effect on heavy dirt or dry stains in the strong cleaning mode, but also prevent the sewage or liquid in the sewage bucket from entering the body and contaminating the vacuum fan.

[0068] During the process of the user using the strong cleaning mode, if the angle detector installed on the floor brush or at the hinge joint between the floor brush and the body detects that the angle between the body and the surface to be cleaned is less than 25°, the control system controls the surface cleaning device to automatically enter the lying flat cleaning state. Or, after the user finishes cleaning heavy dirt and wants to clean low spaces such as under the bed or under the sofa, the user can also manually set the surface cleaning device to enter the lying flat cleaning state. Of course, after the user manually sets to enter the lying flat cleaning state, if the aforementioned angle detector does not detect that the angle between the body and the surface to be cleaned is less than 25° within a certain period of time after the user's setting, then the control system will control the surface cleaning device to exit the lying flat cleaning state and prompt the user to re-select the cleaning mode or restore to the cleaning mode used before the user's selection, so as to prevent the user from misselecting or accidentally touching the button and affecting the normal cleaning process of the user.

[0069] After the surface cleaning device enters the lying flat cleaning state, the control system will adjust the working parameters of the surface cleaning device to the working parameters in the standard cleaning mode. Preferably, the water supply volume of the water supply system is adjusted to 20 g / min, the rotation speed of the cleaning roller is reduced to 500 rpm, and the power of the sewage suction fan is reduced to 55 W. At the same time, a secondary liquid full protection mechanism is enabled. It should be noted that the secondary liquid full protection mechanism here is the same as or similar to the secondary liquid full protection mechanism in Embodiment 1, and both are used to give a liquid full alarm for the sewage in the sewage bucket when the surface cleaning device is in the lying flat cleaning state. Therefore, the relevant description in Embodiment 1 can be referred to, and this embodiment will not be elaborated here. By giving a liquid full alarm for the sewage or liquid in the sewage bucket through this secondary liquid full protection mechanism, it can effectively prevent the sewage or liquid from entering the body and contaminating the sewage suction fan when the surface cleaning device is in the lying flat cleaning state.

[0070] In this embodiment, when the surface cleaning device enters the strong cleaning mode, the control system adjusts the power of the sewage suction fan to 95W or 110W, using the higher power of the sewage suction fan. Since the surface cleaning device is often used to clean the surface to be cleaned in ordinary families, the situation of heavy dirt is not common. This makes the higher power of the sewage suction fan only used occasionally. Therefore, setting the higher power or maximum power of the sewage suction fan within a reasonable range can not only ensure the cleaning effect of heavy dirt, but also prevent the volume of the sewage suction fan itself and the battery pack from being too large due to the excessive power setting of the sewage suction fan, which may cause difficulty in entering the low spaces under the bed and sofa during cleaning. At the same time, it can also avoid the increase in the rising height of the sucked sewage or liquid due to the excessive power of the sewage suction fan, resulting in an increased chance of entering the body. In addition, designing the maximum working power of the sewage suction fan within a reasonable range can also prevent the sewage suction fan from being in a state of "using a big horse to pull a small cart" for a long time, causing waste of resources. When switching from the strong cleaning mode to the flat cleaning state, a good cleaning effect can still be ensured. This is because, in the flat cleaning state, the nozzle of the sewage suction pipe and the lower port of the sewage suction pipe are in the same plane, that is, both are at a height close to the surface to be cleaned. As long as the sewage suction fan can suck the liquid or sewage to the lower port of the sewage suction pipe leading to the sewage bucket, it can enter the sewage suction pipe. At the same time, using gravity and inertia, the liquid and sewage can flow out from the nozzle of the sewage suction pipe. There is no need for such a large suction force, that is, the sewage suction fan does not need such a large working power to suck the liquid or dirt into the sewage bucket. Therefore, controlling the working parameters of the surface cleaning device to enter the standard cleaning mode can well complete the cleaning work in the flat state of the body, ensuring the cleaning effect in the flat cleaning state without polluting the fan. In addition, when entering the flat cleaning mode, the control system adjusts the working parameters of the surface cleaning device to the working parameters in the standard cleaning mode, which is equivalent to reducing the rotation speed of the cleaning roller and the water supply volume of the water supply system. This will reduce the amount of sewage scraped off the cleaning roller by the scraping member and the amount of sewage sucked into the sewage suction pipe by the sewage suction fan, which also helps to prevent sewage or liquid from entering the body and polluting the sewage suction fan. At the same time, the introduction of the first-level liquid full protection mechanism and the second-level liquid full protection mechanism enables the surface cleaning device to effectively detect liquid fullness during operation, and further avoids sewage from entering the body and polluting the sewage suction fan.

[0071] Embodiment 3

[0072] During the process of the user using the standard cleaning mode of the surface cleaning device to clean the surface to be cleaned, if it is found that there is accumulated water or liquid dirt such as soy sauce on the surface to be cleaned, the user can switch to the water absorption cleaning mode through the buttons or function keys on the surface cleaning device. Or, when the user finds that there is accumulated water or liquid dirt on the floors of the living room, bedroom, etc. waiting to be cleaned, the user can also directly enable the water absorption cleaning mode after turning on the surface cleaning device.

[0073] After entering the water absorption cleaning mode, the water supply system supplies water to the cleaning roller or the surface to be cleaned at a third flow rate Q3 for a third duration T3 every second duration T2. The cleaning roller rotates at a first rotational speed N1, and the dirt suction fan operates at a second power P2, where Q2 < Q3 ≤ 6Q1, T2 ≥ 9T3, and 1.7P1 ≤ P2 ≤ 2P1.

[0074] For example, the water supply system operates at 120 g / min for a certain duration of 20 s and then stops working for 3 minutes. After that, it operates at 120 g / min again, repeating this cycle to intermittently supply water to the cleaning roller or the surface to be cleaned. The cleaning roller rotates at a speed of 250 - 500 rpm, and the dirt suction fan operates at a power of 110 W or 95 W.

[0075] The main function of the water absorption cleaning mode is to pump the accumulated water or liquid dirt on the surface to be cleaned into the dirt suction fan. Therefore, the water supply of the water supply system does not need to be too much, nor does the cleaning roller need to be wet. Instead, it is necessary for the cleaning roller to rotate to better collect these liquid dirt. Therefore, the water supply system supplies water intermittently, aiming to wash and clean the dirt adhered to the cleaning roller, so as to facilitate the cleaning roller to continue to absorb and collect the dirt accumulated on the ground until it is sucked clean, and also wipe the surface to be cleaned clean. At the same time, when there is relatively more dirt on the surface to be cleaned itself, the dirt suction fan appropriately uses a power slightly larger than that in the standard cleaning mode, which is also convenient for cleaning the dirt faster. However, the power of the dirt suction fan will not be too large, otherwise it is easier to pollute the fan when there is more liquid dirt itself.

[0076] After the user finishes using the water absorption cleaning mode and cleans the dirt on the surface to be cleaned, if the user wants to continue cleaning low spaces such as under the bed and under the sofa, the user can manually set the surface cleaning device to enter the lying flat cleaning state through the buttons or function keys on the surface cleaning device. If the user does not make a setting and directly inserts the surface cleaning device into the low space, then the angle detector installed on the floor brush or at the hinge joint between the floor brush and the body will, when detecting that the angle between the body and the surface to be cleaned is less than 25°, control the surface cleaning device to automatically enter the lying flat cleaning state. Of course, after the user manually sets to enter the lying flat cleaning state, if the aforementioned angle detector does not detect that the angle between the body and the surface to be cleaned is lower than 25° within a certain period of time after the user's setting, then the control system will control the surface cleaning device to exit the lying flat cleaning state and prompt the user to re - select the cleaning mode or restore to the cleaning mode used before the user's selection to avoid the user's mis - selection or accidental touch of the button affecting the normal cleaning process of the user.

[0077] After the surface cleaning device enters the flat cleaning state, the control system will adjust the control parameters of the surface cleaning device to the control parameters in the standard cleaning mode. For example, the power of the sewage suction fan will be reduced from 110 watts or 95 watts to 55 watts, the rotation speed of the cleaning roller remains unchanged or is appropriately reduced, and the water supply volume of the water supply system is adjusted to 20 g / min.

[0078] After the surface cleaning device enters the flat cleaning state, since the nozzle of the sewage suction pipe and the lower port of the sewage suction pipe are in the same plane, that is, both are at a height close to the surface to be cleaned. As long as the sewage suction fan can suck the sewage or dirt to the lower port of the sewage suction pipe that enters the sewage storage bucket, it can enter the sewage suction pipe. At the same time, using gravity and inertia, the sewage and dirt can flow out from the nozzle of the sewage suction pipe. Therefore, such a large suction force of the sewage suction fan is not required, that is, the sewage suction fan does not need such a large working power to suck the sewage or dirt into the sewage storage bucket. Therefore, selecting the working parameters in the standard cleaning mode can well complete the cleaning work, and at the same time, it will not cause the sewage or dirt to enter the fuselage and contaminate the sewage suction fan due to excessive suction force. At the same time, the rotation speed of the cleaning roller can be appropriately reduced. When the surface cleaning device is in the flat cleaning state, a slower rotation speed of the cleaning roller can reduce the amount of sewage or dirt scraped off by the scraping member from the cleaning roller, thereby reducing the amount of sewage sucked by the sewage suction fan, and to a certain extent, it can also effectively prevent the sewage or dirt from entering the fuselage and contaminating the vacuum fan.

[0079] It should be noted that in order to further prevent sewage or dirt from entering the fuselage and contaminating the sewage suction fan during the cleaning process of the surface cleaning device, in this embodiment, when the surface cleaning device is in the water absorption cleaning mode, a first-level liquid full protection mechanism will be enabled, and when the surface cleaning device is in the flat cleaning state, a second-level liquid full protection mechanism will be enabled. And the first-level liquid full protection mechanism and the second-level liquid full protection mechanism in this embodiment are the same as or similar to those in Embodiment 1. For the relevant description, reference can be made to Embodiment 1, and details will not be repeated in this embodiment.

[0080] Embodiment 4

[0081] The above three embodiments respectively describe entering the flat cleaning state from the standard cleaning mode, the strong cleaning mode, and the water absorption cleaning mode. However, sometimes when users use the surface cleaning device, they will directly clean low spaces such as under the bed and under the sofa, rather than cleaning low spaces such as under the bed and under the sofa during the process of cleaning the floors in the living room and bedroom and waiting for the surface to be cleaned. At this time, after the user turns on the surface cleaning device, the flat cleaning state will be directly enabled. When enabling, the user can manually set the surface cleaning device to enter the flat cleaning state by clicking a button or operating a function key.

[0082] When the control system receives the signal that the surface cleaning device directly enters the flat cleaning state, it controls the working parameters of the surface cleaning device to be the working parameters in the standard cleaning mode and starts cleaning. That is, the water supply system of the surface cleaning device supplies water to the cleaning roller or the surface to be cleaned at a first water supply rate Q1, the cleaning roller rotates at a first rotation speed N1, and the dirt suction fan operates at a first power P1. In one example, the first water supply rate Q1 here is preferably 20 g / min, the first rotation speed N1 is preferably 250 - 500 rpm, and the first power P1 is preferably 55 W. When the surface cleaning device enters the flat cleaning state, the dirt suction fan selects to use the power in the standard cleaning mode, which can not only ensure the cleaning effect in the flat cleaning state, but also prevent the sewage or liquid from being sucked into the body to contaminate the dirt suction fan due to the excessive power of the dirt suction fan, ensuring the safety of the working environment of the dirt suction fan. Further, when the surface cleaning device starts directly in the flat cleaning state, the control system can also adjust the control parameters of the surface cleaning device so that the dirt suction fan operates at the first power P1, the water supply system supplies water at a water supply rate not greater than the first flow rate Q1, and the rotation speed of the cleaning roller adopts a second rotation speed N2, where N2 ≥ N1. Compared with the control parameters in the standard cleaning mode, without increasing the water supply amount, and keeping the rotation speed of the cleaning roller unchanged or increasing the rotation speed of the cleaning roller, it is convenient to wipe the dust clean by the cleaning roller, and the dirt or liquid scraped off at the higher rotation speed of the cleaning roller is thrown to the dirt suction port along with the movement of the cleaning roller. At the same time, if the rotation speed of the cleaning roller is high, the centrifugal force received by the dirt or liquid increases, so that it can better assist the dirt suction fan to pump the liquid or dirt into the sewage bucket without entering the body to contaminate the dirt suction fan. Of course, in order to prevent the sewage or liquid from entering the body to contaminate the dirt suction fan when the surface cleaning device is in the flat cleaning state, a secondary liquid full protection mechanism is also enabled in this embodiment, which is the same as or similar to the secondary liquid full protection mechanism in Embodiment 1. For the relevant description, refer to Embodiment 1, and this embodiment will not be elaborated here.

[0083] In a possible implementation manner, after the surface cleaning device enters the flat cleaning state, it is prohibited to switch to the strong cleaning mode or the water absorption cleaning mode. This is because in these two modes, the power of the dirt suction fan adopts a second power P2, and the second power P2 is preferably 95 W or 110 W, which is nearly doubled compared with the first power P1 of 55 W. When the surface cleaning device is in the flat cleaning state, the greater the power of the dirt suction fan, the greater the probability of sewage or liquid entering the body. Therefore, prohibiting the switch to the strong cleaning mode or the water absorption cleaning mode can effectively prevent the sewage or liquid from contaminating the dirt suction fan.

[0084] It should be noted that the above four embodiments are only exemplary descriptions of this solution and are not used to limit the implementation process or execution process of this solution. During the actual use of the surface cleaning device, users can use the above embodiments alone or in any combination according to actual cleaning or cleaning requirements.

[0085] In a possible implementation manner, the surface cleaning device further includes an electrolyzed water sterilization state: the water supply system provides electrolyzed water to the cleaning roller or the surface to be cleaned to sterilize the surface to be cleaned. However, when the surface cleaning device enters the water absorption cleaning mode, the electrolyzed water sterilization state is prohibited from being enabled, and when entering the standard cleaning mode or the strong cleaning mode, the electrolyzed water sterilization state is intermittently enabled.

[0086] Furthermore, the following alarm logic is also included during the operation of the surface cleaning device:

[0087] 1) Abnormal ground brush motor current alarm: After reaching the alarm condition, the machine stops, aiming to protect / remind the user and protect the machine. The abnormal ground brush motor current alarm is divided into six types. First, the roller brush is not installed alarm. Alarm condition: When the machine starts and enables the ground brush for more than 3s, if the current is less than 700mA for 1.5s, the alarm is triggered, and the alarm voice is "The roller brush has not been installed. The machine has been started for more than 8s without judgment." Second, the first gear of the ground brush overcurrent alarm, 4.5A overcurrent alarm. It does not alarm within 30 seconds after startup. The reason is that at the initial startup stage of the ground brush, the roller brush is in a fluffy state, and at this time, the resistance between the roller brush and the scraper is too large, which may cause the current to be too large and trigger the overcurrent alarm. When it is at 4.5A for 45 seconds, the alarm is triggered. Third, 6.5A overcurrent alarm. It does not alarm within 10 seconds after startup (for the same reason as above). When the ground brush current is greater than 6.5A for 35 seconds, the alarm is triggered. Fourth, 8.8A overcurrent alarm. When the ground brush current is greater than 8.8A for 2s, the alarm is triggered. Fifth, the 10.5A ground brush alarm. Alarm condition: Do not judge within the first 20ms when the ground brush starts. When the ground brush current is greater than 10.5A and is greater than or equal to 50ms, the alarm is triggered. Sixth, 45A ground brush short circuit alarm. When the ground brush motor current is greater than 45A for more than 6us, the short circuit alarm is triggered, or when the ground brush is enabled and the ground brush stops rotating and the ground brush current is less than 200mA, the short circuit alarm is triggered. The reason is that the ground brush chip itself may be ahead of the hardware circuit protection. At this time, there is no current or only a tiny current in the ground brush. According to this condition, the short circuit alarm is judged and the machine stops.

[0088] 2) Fan abnormal alarm: Alarm condition, when there is no communication with the fan, communication anomaly, fan blockage, overheating, water ingress, loss of phase and other alarm states, the machine stops.

[0089] 3) Water pump abnormal alarm: When the water pump current is greater than 3.5A for more than 1.5 seconds or greater than 4.5A, the water pump alarm is triggered and the machine stops.

[0090] 4) Battery pack alarm: When the machine is running, an alarm is triggered when there are abnormalities such as no communication between the battery pack and the control system, abnormal communication, abnormal discharge, or too low voltage, and the machine stops.

[0091] 5) Water tank water shortage alarm: The trigger condition is that when the machine is running normally and it is detected that the output voltage of the water sensor is greater than the specified voltage, the water pump is driven to flush at a large flow rate for 3 seconds repeatedly three times. If it is still greater than the specified voltage, it is determined that the water tank is empty, the water tank alarm is triggered, and the machine stops.

[0092] 6) Liquid full alarm: As Figure 7 shown, the voltage sampling circuit connected to the detection electrode collects the liquid level level of the sewage tank. When the surface cleaning device is in an inclined state, the first-level liquid full protection mechanism is enabled. When the liquid level level is detected as low level, the timing starts. After the timing reaches 100 ms, a liquid full alarm is issued. However, if a high level is detected during the timing process and the duration of the high level reaches 50 ms, the timing stops and re-detection is performed; when the surface cleaning device is in a lying state, the second-level liquid full protection mechanism is enabled. When the duration of the low level lower than 1.3 V reaches 20 ms, the alarm duration is accumulated. When the accumulated alarm duration reaches 2.5 s, a liquid full alarm is issued and the machine stops. However, if during the accumulated timing period, the duration of the low level is less than 10 ms, or the duration of the high level higher than 4 V exceeds 5 s, the alarm timing is cleared. Of course, when the machine is in a lying state, the first-level liquid full protection step can also be enabled, but see Figure 6 , different from when the machine is in an inclined state, when using the first-level liquid full protection mechanism, at least one low level of 20 - 30 ms must be detected before detecting a 100-ms low level to avoid false alarms caused by the user quickly pushing or pulling back the machine.

[0093] In a possible implementation manner, the cleaning roller of the surface cleaning device in this application rotates forward in the direction in which the surface cleaning device moves towards the surface to be cleaned, and under special working conditions, it can rotate in the reverse direction of the forward rotation direction. The special working conditions here include when there is hair entanglement, animal hair, etc. The cleaning roller can rotate in reverse to clean up these hairs to avoid affecting the normal use of the surface cleaning device and make the surface to be cleaned cleaner and more thorough.

[0094] What is not described in this application can be implemented by adopting or referring to existing technologies.

[0095] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0096] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An intelligent cleaning control method for a surface cleaning device, the surface cleaning device comprising a floor brush with a cleaning roller installed at the front end, a body hinged to the floor brush, a suction system with a suction fan, a water supply system and a control system; the floor brush comprises a shell, and a scraping assembly is also arranged on the shell, the surface cleaning device comprises at least a standard cleaning mode: the body is inclined at a certain angle a relative to the horizontal plane, the control system receives a power-on signal, the water supply system is started, and water is supplied to the cleaning roller or the surface to be cleaned at a first flow rate Q1, the cleaning roller rotates at a first speed N1 to wipe the surface to be cleaned, the scraping assembly scrapes the cleaning roller, and the suction fan works at a first power P1 to extract dirt or dirty liquid; characterized in that, The method comprises: In the standard cleaning mode, when the control system receives a signal that the inclination angle of the body relative to the horizontal plane is less than a, the surface cleaning device is controlled to enter a lying cleaning state: the suction fan continues to work at the first power P1, where a≤25°.

2. The intelligent cleaning control method of the surface cleaning device according to claim 1, characterized in that: The sewage suction system also includes a sewage tank connected to the sewage suction fan, and a detection electrode is provided in the sewage tank; the method also includes a first-level liquid full protection step: when the liquid level of the sewage in the sewage tank reaches the sensing end of the detection electrode, the control system receives a low-level liquid full signal, and the low-level liquid full signal lasts for a first time length T1, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and issues a liquid full alarm; When the surface cleaning device enters the lying cleaning state, the first level liquid full protection step also includes: the low level liquid full signal lasts for T1 ′ When the liquid is interrupted after a certain time, and then continues for a first time T1, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and issues a liquid full alarm. ′ <1 / 2T1.

3. The intelligent cleaning control method of the surface cleaning device according to claim 2, characterized in that: When the surface cleaning device enters the lying cleaning state, the method also includes a secondary liquid full protection step: a surge number threshold n0 is set in the control system. When a surge occurs in the sewage tank, and the number n of low-level liquid full signals received by the control system satisfies n≥n0, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and issues a liquid full alarm.

4. The intelligent cleaning control method of the surface cleaning device according to claim 2, characterized in that: When the surface cleaning device enters the lying cleaning state, the method further includes a secondary liquid full protection step: a surge duration threshold t1 and a cumulative alarm duration threshold t2 are set in the control system; When the sewage in the sewage tank surges, the control system receives a low-level liquid full signal for a duration t that satisfies t≥t1 max When t0 satisfies t0≥t2, the alarm duration t0 is accumulated. min When the liquid is full, the control system determines that the liquid is full, controls the surface cleaning device to stop working, and issues a liquid full alarm; where T1≥5t1 max .

5. The intelligent cleaning control method of the surface cleaning device according to claim 4, characterized in that: The secondary liquid full protection step also includes: When the accumulated alarm duration is t0, if the control system receives a low-level liquid full signal for a duration t that satisfies t≤t1 min , or, if the control system does not receive the low-level liquid full signal for a duration t′ that satisfies t′≥t2 max , clear and re-accumulate the alarm duration t0.

6. The intelligent cleaning control method of the surface cleaning device according to claim 1, characterized in that: After the surface cleaning device enters the lying cleaning state, the control system controls the water supply system to continue to supply water to the cleaning roller or the surface to be cleaned at a flow rate not greater than the first flow rate Q1, and controls the cleaning roller to continue to rotate at the second speed N2, where N2≥N1.

7. The intelligent cleaning control method of the surface cleaning device according to claim 1, characterized in that: The surface cleaning device also includes a strong cleaning mode: the control system receives a power-on signal, the water supply system supplies water to the cleaning roller or the surface to be cleaned at a second flow rate Q2, where Q1<Q2≤2Q1, the cleaning roller rotates at a second speed N2, where N1≤N2≤1.2N1, and the dirt suction fan works at a second power P2, where 1.7P1≤P2≤2P1; When the surface cleaning device enters the lying cleaning state in the strong cleaning mode, the control system controls the water supply system, the cleaning roller and the dirt suction fan to adjust to the working parameters in the standard cleaning mode.

8. The intelligent cleaning control method of the surface cleaning device according to claim 1, characterized in that: The surface cleaning device also includes a water suction cleaning mode: the control system receives a start-up signal, the water supply system supplies water to the cleaning roller or the surface to be cleaned at a third flow rate Q3 for a third time period T3 at every second time period T2, wherein Q2<Q3≤6Q1, T2≥9T3, the cleaning roller rotates at a first speed N1, and the dirt suction fan works at a second power P2, wherein 1.7P1≤P2≤2P1; When the surface cleaning device enters the lying cleaning state in the water suction cleaning mode, the control system controls the water supply system, the cleaning roller and the dirt suction fan to adjust to the working parameters in the standard cleaning mode.

9. The intelligent cleaning control method of the surface cleaning device according to claim 1, 7 or 8, characterized in that: After receiving the power-on signal, the control system of the surface cleaning device further includes a cleaning roller infiltration step: the water supply system supplies water to the cleaning roller or the surface to be cleaned at a third flow rate Q3 for a third time period T3, wherein 5Q1≤Q3≤6Q1.

10. An intelligent cleaning control method for a surface cleaning device according to claim 1, 7 or 8, characterized in that: After the surface cleaning device enters the lying cleaning state, it is prohibited to switch to the strong cleaning mode or the water absorption cleaning mode.

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