Method of controlling a surface cleaning device

Abstract

The application relates to the cleaning field and discloses a control method of a surface cleaning device, the surface cleaning device comprising a floor brush with a roller brush cavity, a cleaning roller arranged in the roller brush cavity, and a liquid supply system for supplying liquid to the cleaning roller, the floor brush comprising a dirt scraping assembly, the dirt scraping assembly having a first position in abutment with the cleaning roller and a second position with a gap from the cleaning roller, the control method of the surface cleaning device comprising: in response to receiving a shutdown signal, controlling the liquid supply system to stop supplying liquid, controlling the dirt scraping assembly to be in the second position, and controlling the cleaning roller to continue rotating for a time t1. Compared with the related art, the control method of the surface cleaning device can reduce residual sewage after the surface cleaning device is shut down, and improve the cleaning effect.

Description

Technical Field

[0001] This application relates to the field of cleaning, and more specifically, to a control method for a surface cleaning device. Background Technology

[0002] With the improvement of people's living standards, surface cleaning devices have been widely used in people's lives. Specifically, surface cleaning devices usually include a floor brush assembly, a vacuum system, and a water supply system. The floor brush assembly has a cleaning component, a scraping component, a squeegee, and a suction port. The squeegee is located below the suction port, and the cleaning component is located in front of the suction port and the squeegee. The scraping component is in contact with the cleaning component. The vacuum system includes a fan, a suction channel, and a wastewater tank connected to the suction channel. The suction port is connected to the suction channel. The floor squeegee is usually a soft rubber strip. When the surface cleaning device is working, the floor squeegee and the cleaning component are in contact with the ground. There is a gap between the floor squeegee and the cleaning component. Therefore, the floor squeegee, the floor brush housing, the cleaning component, and the scraping component form a suction channel at the front end of the suction port. The gap between the floor squeegee and the cleaning component forms the suction nozzle of the suction system. When the cleaning component rotates continuously to rub and clean the ground, the suction fan works to suck away the sewage or dirt scraped off by the scraping component through the suction port and suction channel and store it in the sewage tank. The above process continues until the surface cleaning device completes the cleaning work and is turned off. However, when the surface cleaning device receives a shutdown command, it stops supplying water, and both the cleaning components and the suction fan stop rotating. Yet, we found that wastewater always remained on the floor where the machine stopped. This is because when the suction fan stops working, during operation, wastewater spirals upwards along the wall of the suction channel until it overflows the pipe and falls into the wastewater tank. When the suction fan stops, some wastewater drips adhere to the inner wall of the suction pipe and cannot be sucked into the wastewater tank; instead, it flows back along the suction channel to the suction port. This is one reason why residual water appears on the floor after shutdown. To address this, industry technicians have improved the product by delaying the shutdown of the suction fan and increasing its suction power, hoping to draw all the remaining wastewater in the suction channel into the wastewater tank. However, because the cleaning components immediately stop rotating, and the scraping assembly no longer squeezes and scrapes the cleaning components, the wastewater on the cleaning components loses centrifugal force. Even if the suction power of the vacuum blower is increased and suction is performed, only the wastewater in the suction channel and near the suction port can be drawn into the waste bin. Since the cleaning components no longer rotate, the wastewater at the suction nozzle loses the driving force to enter the nozzle. Therefore, if the floor brush does not move back and forth or the cleaning components do not rotate, a dead zone of water accumulates near the floor scraper strip, or in front of the floor scraper strip. Especially if there is already a lot of water on the surface to be cleaned, the water will be pressed under the floor scraper strip and cannot be sucked away. Even if the suction power of the vacuum blower is increased, it is still impossible to completely draw the wastewater into the waste bin. This is one reason why, when the machine stops, the water on the ground is not driven by the rotating cleaning rollers and cannot be thrown towards the suction port, resulting in residual water on the ground.To address this technical issue, some surface cleaning devices continue to rotate the cleaning components for a period of time after receiving a shutdown command. This continued rotation draws wastewater from the dead zones near the cleaning components and / or floor scrapers into a wastewater tank. For example, patent application number 202211696653.9 discloses such a solution. However, while the continued rotation of the cleaning components removes water from the dead zones, the scraping components continue to compress the cleaning components, causing wastewater to be scraped down to the suction port and flow along it to the suction nozzle. Additionally, after the water supply system stops, a small amount of water remains in the water supply pipes and distribution components. This water, due to inertia and gravity, flows out from the distribution port and along the distribution plate to the suction nozzle. This is one reason why residual water still appears after the roller brush stops rotating (i.e., the delayed shutdown ends) and the suction fan also stops working (i.e., the delayed shutdown ends).

[0003] Therefore, even if the cleaning component continues to run and rotate for a period of time after receiving a shutdown command, some sewage will still remain on the surface to be cleaned, affecting the overall cleaning effect of the surface cleaning device. Summary of the Invention

[0004] The purpose of this application is to provide a control method for a surface cleaning device that can reduce residual wastewater after the surface cleaning device is turned off and improve the cleaning effect.

[0005] This application provides a control method for a surface cleaning device. The surface cleaning device includes a floor brush with a brush cavity, a cleaning roller disposed in the brush cavity, and a liquid supply system for supplying liquid to the cleaning roller. The floor brush includes a scraping component having a first position abutting against the cleaning roller and a second position having a gap with the cleaning roller. The control method for the surface cleaning device includes: in response to receiving a shutdown signal, controlling the liquid supply system to stop supplying liquid, controlling the scraping component to be in the second position, and controlling the cleaning roller to continue rotating for a duration t1.

[0006] In the control method of the surface cleaning device provided in this application embodiment, after receiving the shutdown signal, the liquid supply system is controlled to stop supplying liquid. This prevents the liquid supply system from continuing to supply liquid to the cleaning roller, which would cause the moisture content of the cleaning roller to increase further. This ensures that the cleaning roller is not wet after shutdown and prevents excessive water content in the cleaning roller from being scraped off by the scraping component and falling onto the surface to be cleaned. After stopping the liquid supply, the cleaning roller continues to rotate for a time t1 after the scraping component is in the second position. During this time, the scraping component is no longer in contact with the cleaning roller, so the cleaning roller continues to rotate while the scraping component no longer squeezes the cleaning roller. The cleaning roller, without generating new dirt that is squeezed out by the scraping assembly, not only absorbs dirt accumulated near the cleaning roller and / or the floor scraper, but also throws it towards the suction port as the cleaning roller rotates. Because the scraping assembly is positioned with a gap between it and the cleaning roller, not only is the lower suction channel formed by the cleaning roller and the floor scraper opened, but the upper suction channel within the roller brush cavity above the scraping assembly is also opened. This larger suction channel allows the suction fan to operate, thus better collecting the dirt thrown towards the suction port by the cleaning roller. The rotation of the cleaning roller itself continues to wipe away the small amount of wastewater flowing back from the suction channel and suction port, as well as dripping from the cleaning roller onto the surface to be cleaned. Since the scraping assembly is now positioned in a second position with a gap between it and the cleaning roller, it prevents the scraping assembly from scraping wastewater off the cleaning roller and dripping onto the surface to be cleaned. This better facilitates the collection and wiping of residual wastewater after the surface cleaning device is turned off, further improving the cleaning effect.

[0007] In an optional embodiment, the surface cleaning device further includes a suction system with a suction fan, controlling the scraping assembly to be in the second position. The control method of the surface cleaning device further includes controlling the suction fan to continue running for a duration of t2. Even after receiving a shutdown signal, the suction fan continues to run for t2. With the continued rotation of the cleaning roller, due to the gap between the scraping assembly and the cleaning roller, and without the obstruction of the scraping assembly, the accumulated dirt between the floor scraper and the cleaning roller, especially the dirt accumulated near the floor scraper, can be carried by the cleaning roller to the vicinity of the suction port. This facilitates the suction fan to draw this portion of the dirt thrown towards the suction port into the suction port, the suction pipe, and send it to the collection bucket. Even when the suction fan stops working, even if a small amount of dirt flows back to the surface to be cleaned below the suction port, the continued rotation of the cleaning roller can absorb the wastewater flowing down from the suction channel and dripping from the cleaning roller onto the surface to be cleaned, preventing it from being scraped off by the scraping assembly onto the surface to be cleaned.

[0008] In an optional embodiment, controlling the suction fan to continue operating for a duration of t2 includes: acquiring the operating power W1 of the suction fan before receiving the shutdown signal; and controlling the suction fan to continue operating at a power of W2 for a duration of t2, where W2 ≥ W1. Under the wiping action of the cleaning roller, the amount of wastewater remaining on the surface to be cleaned is usually small. Controlling the suction fan to continue operating at a higher power of W2 for a duration of t2 can increase the suction force of the suction fan. Combined with the rotation of the cleaning roller, this better and more actively throws the wastewater near the floor scraper and cleaning roller towards the suction port, thereby better removing the small amount of residual wastewater.

[0009] In an optional embodiment, the method further includes: controlling the floor brush to move backward in response to receiving a shutdown signal; and / or controlling the floor brush to move forward. Since wastewater flowing down from the suction channel to the surface to be cleaned moves around the floor brush, controlling the floor brush to move forward and / or backward after receiving the shutdown signal can better collect the wastewater flowing in front of and / or behind the floor brush into the cleaning roller.

[0010] In an optional embodiment, the moving speed of the floor brush tends to decrease as the duration of receiving the shutdown signal increases. As the duration of receiving the shutdown signal increases, the residual wastewater on the surface to be cleaned gradually decreases, increasing the cleaning difficulty. Setting the moving speed of the floor brush to decrease at this time can prolong the cleaning friction time between the cleaning roller and each area, so that the cleaning roller can better clean and collect the small amount of residual wastewater.

[0011] In an optional embodiment, the roller brush cavity includes a suction port, and the cleaning roller is spaced apart from the suction port. Controlling the floor brush to move backward includes: controlling the floor brush to move backward a distance greater than or equal to the distance between the cleaning roller and the suction port; or, controlling the difference between the backward movement distance and the forward movement distance of the floor brush to be greater than or equal to the distance between the cleaning roller and the suction port. Since wastewater flowing down from the suction channel to the surface to be cleaned usually flows out from the suction port, the suction port retains the most wastewater. Controlling the backward movement distance of the floor brush to be greater than or equal to the distance between the cleaning roller and the suction port, or controlling the difference between the backward movement distance and the forward movement distance of the floor brush to be greater than or equal to the distance between the cleaning roller and the suction port, allows the cleaning roller to wipe away the residual wastewater at the suction port, ensuring a cleaning effect on the wastewater at the suction port.

[0012] In an optional embodiment, in response to receiving a shutdown signal, the floor brush is controlled to move backward and / or the floor brush is controlled to move forward; the floor brush stops moving before the cleaning roller stops rotating; and the suction fan stops operating before the floor brush stops moving.

[0013] In an optional embodiment, the method further includes: responding to a power-off signal, controlling the scraping component to be in the first position, controlling the cleaning roller to rotate alternately in both forward and reverse directions for a duration of t3, and controlling the scraping component to move to the second position. Before controlling the scraping component to move to the second position, the scraping component is first controlled to be in the first position, and the cleaning roller is simultaneously controlled to rotate alternately in both forward and reverse directions for a duration of t3. The scraping component in the first position can scrape off the wastewater on the cleaning roller. At this time, since the suction fan is still running, this scraped wastewater can be directly sucked away by the suction fan, thereby reducing the water content on the cleaning roller. The cleaning roller with lower water content can achieve a better cleaning effect on the wastewater remaining on the surface to be cleaned after the scraping component moves to the second position. In addition, controlling the scraping component to rotate alternately in both forward and reverse directions for a duration of t3 can also clean the wastewater or dirt adhering to the cavity wall of the roller brush cavity and near the suction port. At the same time, during the movement of the scraping component between the first and second positions, the dirt adhering to the cleaning roller can also be loosened, especially the hair wrapped around the cleaning roller, making it easier to collect and clean the dirt on the cleaning roller.

[0014] In an optional embodiment, the floor brush further includes a floating scraper, which includes a high position detached from the surface to be cleaned and at least partially abutting the cleaning roller, and a low position abutting the surface to be cleaned and gap-fitting the cleaning roller. The control method of the surface cleaning device further includes: in response to receiving a shutdown signal, controlling the floating scraper to stop after it reaches the low position, or controlling the floating scraper to move along the surface to be cleaned after it reaches the low position. After receiving the shutdown signal, controlling the floating scraper to stop after it reaches the low position, since the floating scraper abuts the surface to be cleaned and gap-fitting the cleaning roller when it is in the low position, the floating scraper can form a closed cavity structure with the surface to be cleaned and the cleaning roller, and the suction effect of the suction fan in the cavity structure is better, thereby improving the cleaning effect of residual sewage on the surface to be cleaned; or, after receiving the shutdown signal, controlling the floating scraper to move along the surface to be cleaned after it reaches the low position, the surface to be cleaned can be further wiped.

[0015] In an optional embodiment, controlling the scraping component to be in the second position includes: controlling the scraping component to be in the second position after the duration of receiving the shutdown signal reaches t4; or, controlling the scraping component to be in the second position after the duration of the liquid supply system stopping liquid supply reaches t4. Since a small amount of liquid that has already entered the liquid supply pipe may still flow out and drip onto the cleaning roller after the liquid supply system stops supplying liquid, controlling the scraping component to be in the second position after the duration of receiving the shutdown signal reaches t4, or after the duration of the liquid supply system stopping liquid supply reaches t4, allows this portion of water dripping onto the cleaning roller to be scraped off by the scraping component and collected, reducing the impact of residual liquid in the water supply pipe on the cleaning effect of the surface to be cleaned. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the surface cleaning device provided in the embodiments of this application;

[0018] Figure 2 This is a cross-sectional structural diagram of the floor brush in the surface cleaning device provided in the embodiments of this application;

[0019] Figure 3 A partial enlarged view of part Q in the surface cleaning apparatus provided in the embodiment of this application when the scraping component is in the first position;

[0020] Figure 4 A partial enlarged view of part Q in the surface cleaning apparatus provided in the embodiment of this application when the scraping component is in the second position;

[0021] Figure 5 This is a schematic flowchart of the control method for the surface cleaning device provided in Embodiment 1 of this application;

[0022] Figure 6 This is a schematic flowchart of the control method for the surface cleaning device provided in Embodiment 2 of this application;

[0023] Figure 7 This is a schematic flowchart of the control method for the surface cleaning device provided in Embodiment 3 of this application;

[0024] Figure 8 This is a schematic flowchart of the control method for the surface cleaning device provided in Embodiment 4 of this application;

[0025] Figure 9 This is a schematic flowchart of the control method for the surface cleaning device provided in Embodiment 5 of this application;

[0026] Figure 10 This is a cross-sectional view of the surface cleaning device provided in this application, where the floating scraper is positioned at a high level.

[0027] Figure 11 This is a cross-sectional view of the surface cleaning device provided in the embodiments of this application, showing the floating scraper at a low position.

[0028] Figure 12 This is a schematic diagram of the structure of a floor scraper. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the present application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0034] Specifically, in this application, the surface cleaning device can be used in conjunction with a base to form a surface cleaning equipment. The surface cleaning device can be a floor scrubber with a body and a floor brush, a cleaning robot with cleaning components mounted on its housing, a carpet cleaner, or a multi-functional surface cleaning device capable of cleaning both carpets and floors. Any mechanical device capable of cleaning the surface to be cleaned can be used as the surface cleaning device in this application. As a floor scrubber with a body and a floor brush, it also includes a power system, which includes a vacuum fan and a battery pack. The power system can be independent and detachably mounted on the body. The body has an air duct that connects to the power system, and the air duct communicates with a wastewater tank mounted on the body to create negative pressure inside the wastewater tank; alternatively, the power system can be installed inside the body. The cleaning roller can be a single-roller structure consisting of only one roller and a cleaning cloth sleeved over the roller, a double-roller structure with two single rollers on the floor brush (front and rear), or a tracked structure consisting of two rollers and cleaning cloths sleeved over both rollers. The cleaning roller can be a roller covered with a cleaning cloth, a roller with stiff bristles, or a combination of rollers covered with absorbent materials such as sponges. The surface cleaning device also includes a water supply system, which includes a water tank and a water pump. The water pump lifts the water in the tank to a water distribution component, which has a water inlet. The water tank and water pump can be mounted on the machine body, or both can be mounted inside the floor brush. These are all within the scope of protection of this invention, and will not be listed here.

[0035] Example 1

[0036] Embodiment 1 of this application provides a control method for a surface cleaning device, used to control the surface cleaning device. Please refer to... Figures 1 to 4 In this embodiment, a floor scrubber is used as the surface cleaning device for description. The surface cleaning device 100 includes a floor brush 20 with a brush cavity 10, a cleaning roller 30 disposed in the brush cavity 10, and a liquid supply system for supplying liquid to the cleaning roller 30 (including...). Figure 1 The water bucket 41 shown Figure 2 The floor brush 20 also includes a scraping assembly 21, as shown in the diagram (including the water inlet 42, the motor connecting the clean water tank 41 and the water inlet 42, and the water supply pipe). Figure 3 and Figure 4 The cleaning component 21 has the following features: Figure 3 The first position shown, which abuts against the cleaning roller 30, and as shown Figure 4The second position shown has a gap with the cleaning roller 30. The scraping assembly 21 includes a first seal 211, a scraper 212, comb teeth 213, a rotating part 214, and a second seal 215. The rotating part 214 drives the first seal 211, comb teeth 213, and scraper 212 to rotate, thereby switching between the first and second positions. The scraper 212 and comb teeth 213 clean the cleaning roller 30. During the switching between the first and second positions, the first seal 211 cleans the cavity wall of the roller brush chamber 10, and the second seal 215 cleans the lower surface of the rotating part 214. A suction system (including...) is also included. Figure 1 The suction fan 51 and the sewage tank 52 shown are shown. Figure 2 The suction port 53 and suction channel 54 are shown, wherein the suction fan 51 is used to generate suction to draw the dirt near the suction port 53 into the suction channel 54, and further draw it into the sewage tank 52 for collection via the suction channel 54. The floor brush housing below the suction port 53 is also equipped with a floor scraper 70, which is made of soft rubber material. When the surface cleaning device is working, the floor scraper 70 forms a gripper attached to the ground, and the cleaning roller 30 also comes into contact with the ground. There is a gap between the floor scraper 70 and the cleaning roller. Therefore, the floor scraper 70, the floor brush housing, the cleaning roller 30, the comb teeth 213 and the scraper 212 form a suction channel at the front end of the suction port 53. The gap between the floor scraper 70 and the cleaning roller 30 forms a suction nozzle of the suction system. The dirt or grime on the surface 200 to be cleaned enters the suction channel from the suction nozzle, and is then drawn into the suction port 53 and the suction channel 54 by the suction fan 51 and sent into the waste collection bucket.

[0037] To solve this technical problem, please refer to Figure 5 Applications in control such as Figures 1 to 4 The surface cleaning device shown in this embodiment, and the control method of the surface cleaning device provided in this embodiment, include the following steps:

[0038] Step S101: In response to receiving a shutdown signal, control the liquid supply system to stop supplying liquid.

[0039] In this step, all subsequent control steps are operation steps corresponding to the power-off signal received. All subsequent control steps occur after the power-off signal is received, and each subsequent operation step is executed immediately upon receiving the power-off signal.

[0040] In this step, the liquid supply system includes, in addition to, the following: Figure 1 and Figure 2In addition to the clean water tank 41 and water inlet 42 shown, the system also includes an internal motor and water supply pipeline. When the liquid supply system is operating normally and supplying liquid to the cleaning roller 30, the motor drives the clean water in the clean water tank 41 to the water inlet 42 via the water supply pipeline, and then supplies the clean water to the cleaning roller 30 via the water inlet 42. In this step, stopping the liquid supply system means stopping the motor in the system, thus ceasing to drive the clean water in the clean water tank 41 to be supplied to the cleaning roller 30 via the water inlet 42.

[0041] Step S102: Control the scraping assembly to the second position and control the cleaning roller to continue rotating for t1 time.

[0042] In this step, the scraping assembly 21 is controlled to be in the second position, that is, the final position of the scraping assembly 21 is the second position. Specifically, if the scraping assembly 21 is not initially in the second position, such as in the first position or between the first and second positions, the scraping assembly 21 is controlled to move to the second position; if the scraping assembly 21 is initially in the second position, the scraping assembly 21 is controlled to remain in the second position.

[0043] Of course, it is understandable that in some other embodiments of this application, in addition to controlling the rotation time t1 of the cleaning roller 30, the number of rotations r1 of the cleaning roller 30 can also be controlled. For example, it can continue to rotate at a slower speed. For instance, if the cleaning roller rotates at 500 rpm under normal conditions, after receiving a shutdown signal, the cleaning roller can be controlled to rotate at 50 rpm or 100 rpm for r1 rotations. Of course, the t1 time and r1 rotations can be preset fixed time and fixed number of rotations, such as the time and number of rotations set when the surface cleaning device leaves the factory, or the time and number of rotations can be user-defined. Alternatively, in some other embodiments of this application, the t1 time and r1 rotations can be determined based on the cleaning effect of the surface 200 to be cleaned. For example, an image of the surface 200 to be cleaned can be captured by a camera, and then the cleanliness level of the surface 200 to be cleaned can be determined by image processing technology based on the captured image. The specific t1 time and r1 rotations of the cleaning roller can then be determined based on the cleanliness level of the surface 200 to be cleaned. Specifically, in this first embodiment, for example, the duration t1 can be set to 3 seconds and the number of revolutions r1 to 10 revolutions, that is, after the scraping component 21 is in the second position, the cleaning roller 30 is controlled to continue rotating for 3 seconds or to continue rotating for 10 revolutions. Further, in this first embodiment, during the continued rotation of the scraping component 21 for the duration t1 / r1 revolutions, it rotates at a high speed of 500 revolutions per minute; or in some other embodiments of this application, it can rotate at a low speed such as 300 revolutions per minute or 100 revolutions per minute. Alternatively, upon receiving a shutdown signal, the cleaning roller 30 rotates at a speed of 500 rpm. After the suction fan 51 stops working, the cleaning roller 30 continues to rotate at a slower or lower speed, such as 200 rpm, 300 rpm, 100 rpm, or 50 rpm, until the delay time ends. This allows the cleaning roller 30 to fully wipe and absorb the last bit of residual liquid in the liquid accumulation area without splashing the liquid out. Since the scraping component 21 does not contact the cleaning roller 30 and has a gap, the liquid absorbed by the cleaning roller 30 will not be scraped off onto the surface 200 to be cleaned again, thus cleaning the surface 200 to be cleaned more thoroughly and without residue.

[0044] Furthermore, in this first embodiment, controlling the scraping component 21 to be in the second position can specifically be done when the duration of receiving the shutdown signal reaches t4, or when the duration of the liquid supply system stopping liquid supply reaches t4. Since a small amount of liquid that has already entered the liquid supply pipe may still flow out and drip onto the cleaning roller 30 after the liquid supply system stops supplying liquid, the scraping component 21 is controlled to be in the second position after the time t4 of receiving the shutdown signal or the time t4 of the liquid supply system stops supplying liquid. During the time t4, the cleaning roller 30 continues to rotate and the suction fan continues to work. After this part of the liquid remaining in the liquid supply pipe drips onto the cleaning roller 30, it is scraped off the cleaning roller 30 by the scraping component 21 and sucked into the sewage tank 52 by the suction fan 51. This makes the water that remains in the liquid supply pipe and drips onto the cleaning roller 30 scraped off by the scraping component 21 and collected, reducing the impact of the residual liquid in the water supply pipe on the cleaning effect of the surface to be cleaned 200.

[0045] Compared with related technologies, in the control method of the surface cleaning device provided in this embodiment, after receiving the shutdown signal, the liquid supply system is controlled to stop supplying liquid. This can prevent the liquid supply system from continuing to supply liquid to the cleaning roller 30, which would cause the moisture content of the cleaning roller 30 to increase further. This ensures that the cleaning roller 30 is not wet after shutdown, and prevents excessive water content in the cleaning roller 30 from being scraped off by the scraping component 21 and falling onto the surface to be cleaned 200. After stopping the liquid supply, after controlling the scraping component 21 to be in the second position, the cleaning roller 30 is still controlled to continue rotating for t1 time or r1 revolutions. The cleaning roller 30 continues to rotate for t1 time or r1 revolutions. At this time, the scraping component 21 is in the second position and is no longer in contact with the cleaning roller 30. Therefore, the cleaning roller 30 continues to rotate for t1 time. When the number of rotations is r1, the scraping assembly 21 no longer squeezes the cleaning roller 30, and no new dirt is squeezed out by the scraping assembly 21. Not only can the dirt accumulated near the cleaning roller 30 and / or the floor scraper be absorbed by the cleaning roller 30 and followed by the rotation of the cleaning roller 30 and thrown towards the suction port 53, but since the scraping assembly 21 and the cleaning roller 30 are in a second position with a gap, not only is the lower suction channel formed by the cleaning roller 30 and the floor scraper opened, but the upper suction channel in the roller brush cavity above the scraping assembly 21 is also opened. With a larger suction channel, the suction fan 51 can better collect the dirt thrown by the cleaning roller 30 towards the suction port 53, while the rotation of the cleaning roller 30 itself can continue to wipe away the small amount of sewage that flows back from the suction channel and suction port 53 and drips from the cleaning roller 30 onto the surface to be cleaned 200. Since the scraping component 21 is now positioned at a second position with a gap between it and the cleaning roller 30, the scraping component 21 can prevent the wastewater on the cleaning roller 30 from being scraped off and dripping onto the surface to be cleaned 200. This better enables the collection and wiping of the wastewater remaining after the surface cleaning device is turned off, further improving the cleaning effect.

[0046] Example 2

[0047] Embodiment 2 of this application provides a control method for a surface cleaning device. Please refer to... Figure 6 Compared with the aforementioned Embodiment 1, the control method of the surface cleaning device provided in Embodiment 2 also includes steps S101 and S102. The difference is that Embodiment 2 further includes:

[0048] Step S103: Control the suction fan 51 to continue running for t2 hours.

[0049] In this second embodiment, the t2 duration can also be a pre-set fixed duration, such as the duration set at the factory when the surface cleaning device leaves the factory, or a user-defined duration. Alternatively, in some other embodiments of this application, the t2 duration can be determined based on the cleaning effect of the surface 200 to be cleaned. For example, an image of the surface 200 to be cleaned can be captured by a camera, and then the cleanliness level of the surface 200 to be cleaned can be determined based on the captured image using image processing technology. The specific t2 duration for the cleaning roller to continue rotating can then be determined based on the cleanliness level of the surface 200 to be cleaned.

[0050] Furthermore, in this second embodiment, timing begins at the same moment, t2 < t1. That is, the cleaning roller 30 continues to rotate for a period of time after the suction fan 51 stops operating before stopping. Taking t1 as 3 seconds in the example of the first embodiment, in this second embodiment, t2 can be 2 seconds. That is, after the scraping assembly 21 is in the second position, the suction fan 51 is controlled to continue running for 2 seconds, while the cleaning roller 30 is controlled to continue rotating for 3 seconds.

[0051] Furthermore, in this second embodiment, in response to receiving a shutdown signal, the operating power of the suction fan 51 tends to increase; that is, after receiving the shutdown signal, the operating power of the suction fan 51 increases. Specifically, for example, the operating power W1 of the suction fan 51 before receiving the shutdown signal can be obtained, and after receiving the shutdown signal, the suction fan is controlled to continue running at a power of W2 for a duration t2, where W2 ≥ W1. Since the cleaning roller 30 continues to rotate after receiving the shutdown signal, wiping the surface 200 to be cleaned, the amount of wastewater 300 remaining on the surface 200 to be cleaned is usually small under the wiping action of the cleaning roller 30. For a small amount of wastewater, a greater suction force is needed to suck it into the wastewater tank 52. Therefore, controlling the suction fan 51 to continue running at a greater power of W2 for a duration t2 after receiving the shutdown signal can increase the suction force of the suction fan 51 and better suck the small amount of residual wastewater into the wastewater tank 52 for collection.

[0052] Specifically, in this second embodiment, if the actual working power of the suction fan 51 is 55W during normal cleaning, then after receiving the shutdown signal, the power of the suction fan 51 can be adjusted to the maximum power, such as 95W or 110W; if the surface cleaning device is a high-power device with strong suction, for example, if the actual working power of the suction fan 51 is 95W when suctioning liquid or dirt during normal cleaning, then after receiving the shutdown signal, the power of the suction fan can be adjusted to the maximum power, such as 220W or 250W.

[0053] Furthermore, in this second embodiment, after receiving the shutdown signal, the operating power W2 of the suction fan 51 can be a stable fixed power. That is, after receiving the shutdown signal, the operating power of the suction fan 51 is increased to a stable W2 and then maintained at power W2. Alternatively, in some other embodiments of this application, the operating power W2 of the suction fan 51 after receiving the shutdown signal can also be a variable power. That is, after receiving the shutdown signal, the operating power W2 of the suction fan 51 is adjusted in real time to adapt to different cleaning states. In this case, W2 ≥ W1 specifically means that the minimum value of the variable power W2 is greater than or equal to W1.

[0054] Compared with related technologies, in the control method of the surface cleaning device provided in this embodiment 2, after receiving the shutdown signal, the suction fan 51 is still controlled to continue running for t2 hours. With the cleaning roller 30 continuing to rotate, if the rotation speed of the cleaning roller 30 is 500 rpm during normal cleaning, the rotation speed of the cleaning roller can be increased to 600 rpm. Since there is a gap between the scraping component 21 and the cleaning roller 30, without the obstruction of the scraping component 21, the dirt accumulated on the scraper and the cleaning roller... The sludge between the cleaning roller 30 and the floor scraper 70, especially the sludge accumulated near the floor scraper, can be carried by the cleaning roller 30 to the vicinity of the suction port 53. As the rotation speed of the cleaning roller 30 increases, the force of the cleaning roller 30 moving the sludge between the cleaning roller 30 and the floor scraper 70 on the surface to be cleaned increases. The sludge generates a large centrifugal force under the higher rotation speed of the cleaning roller 30, which facilitates the suction fan 51 to draw the sludge thrown towards the suction port 53 into the suction port 53, the suction pipe and send it to the sludge collection tank 52. Even after the suction fan 51 stops working, even if a small amount of sewage flows back to the surface 200 to be cleaned below the suction port 53, the continued rotation of the cleaning roller 30, combined with the increased working power of the suction fan 51 (i.e., increased suction force of the suction fan 51), can absorb the sewage flowing down from the suction channel and dripping from the cleaning roller 30 onto the surface 200 to be cleaned onto the cleaning roller 30, and then be drawn into the sewage collection bucket by the suction fan 51. It will no longer be scraped off onto the surface 200 to be cleaned by the scraping component 21.

[0055] Example 3

[0056] Embodiment 3 of this application provides a control method for a surface cleaning device. Please refer to... Figure 7 Compared with the aforementioned Embodiment 1, the control method of the surface cleaning device provided in Embodiment 3 also includes steps S101 and S102. The difference is that Embodiment 3 further includes:

[0057] Step S104: In response to receiving a power-off signal, control the ground brush 20 to move backward.

[0058] In this third embodiment, controlling the floor brush 20 to move backward can specifically control the floor brush 20 to move in the direction from the cleaning roller 30 to the suction port 53.

[0059] Normally, the forward and backward movement of the floor brush 20 is caused by the rotation of the cleaning roller 30. The drive motor that drives the cleaning roller 30 to rotate is driven by the transmission device to rotate the cleaning roller 30 backward (that is, rotation towards the suction port 53 with the cleaning roller 30 as the reference). This generates a forward frictional force with the surface to be cleaned 200, thereby moving the floor brush 20 forward. The floor brush 20 can also move backward by the cleaning roller 30 rotating forward, generating a backward frictional force with the surface to be cleaned 200, thereby moving the floor brush 20 backward. Of course, it can also be achieved by the customer pulling the motor body backward. Of course, later, in order to reduce the burden on customers, some products have added an assist mechanism to the floor brush 20. For example, an assist wheel and a drive motor are added separately to the floor brush 20. The drive motor drives the assist wheel to move backward, thereby making the floor brush 20 move backward. Alternatively, a conversion mechanism and a transmission mechanism can be added. The motor that drives the cleaning roller 30 to rotate drives the assist wheel to move through the conversion mechanism and the transmission mechanism, thereby realizing the backward movement of the floor brush 20. Or, a separate drive motor is set on the floor brush 20, and the auxiliary wheel 90 located at the rear end of the floor brush 20 is connected to the drive motor to drive the auxiliary wheel 90 to move backward, thereby providing assistance for the backward movement of the floor brush and reducing the force required by the customer, so that the customer can use the surface cleaning device to clean more easily.

[0060] Since the suction port 53 is located in front of the floor brush 20, the cleaning roller 30 is located in front of the suction port 53, and the floor scraper 70 is located below the suction port 53, the floor scraper 70 and the cleaning roller 30 form a suction nozzle. Dirt enters the suction channel through this nozzle and is drawn towards the suction port 53. Therefore, after receiving the shutdown signal, any remaining dirt is still at the suction nozzle formed by the floor scraper 70 and the cleaning roller 30. Thus, most of the dirt is located behind the cleaning roller. Based on this, in the control method of the surface cleaning device provided in this application embodiment, by moving the scraping component 21 to the second position, and then allowing the cleaning roller 30 to continue rotating, while the floor brush 20 moves, and controlling the floor brush 20 to move backward first, the dirt at the suction nozzle located between the cleaning roller 30 and the floor brush 70 can be wiped by the cleaning roller 30. At this time, the scraping component 21 does not contact the cleaning roller 30 and has a gap with the cleaning roller 30, so the dirt absorbed by the cleaning roller 30 will not be scraped away from the cleaning roller 30 by the scraping component 21. The dirt absorbed by the cleaning roller 30 will follow the rotation of the cleaning roller 30 and be thrown towards the suction port 53 by centrifugal force. At the same time, under the suction of the suction fan 51, it will be collected into the dirt container through the suction port 53 and the suction channel, thereby cleaning up the residual or accumulated dirt, and the cleaning surface 200 will no longer have any dirt residue.

[0061] Furthermore, in some other embodiments of this application, in addition to controlling the brush 20 to move backward, the brush 20 may be controlled to move forward first and then move backward, or the brush 20 may be controlled to move backward first and then move forward, etc. Moving forward is the reverse of moving backward.

[0062] Furthermore, during the forward and / or backward movement of the floor brush 20, the moving speed of the floor brush 20 tends to decrease as the duration of the received shutdown signal increases. That is, after receiving the shutdown signal, the moving speed of the floor brush 20 gradually decreases over time. Decreasing the moving speed of the floor brush 20 allows the cleaning roller 30 to slowly pass over the liquid residue area that needs cleaning, or it increases the contact time between the cleaning roller 30 and the liquid residue area, thereby more fully absorbing the dirt in the liquid residue area. While the moving speed of the floor brush 20 shows a gradual decreasing trend—meaning the overall moving speed gradually decreases over time—it is possible that there may be a slight increase in the moving speed at a certain point in time or for a short period. This can be expressed as a function, constructing a graph of the moving speed of the floor brush 20 versus time. Then, linear fitting of this graph shows that the moving speed of the floor brush 20 is negatively correlated with time.

[0063] Furthermore, regarding the forward and / or backward movement distance of the floor brush 20, the absolute backward movement distance of the floor brush 20 can be controlled to be greater than or equal to the distance between the cleaning roller 30 and the suction port 53. Specifically, the absolute backward movement distance of the floor brush 20 is the maximum distance from the highest point of the floor brush 20 to the entire moving area covered during its forward and backward movement. In this third embodiment, only the backward movement of the floor brush 20 is controlled, so the absolute backward movement distance of the floor brush 20 is the maximum backward movement distance of the floor brush 20, which corresponds to controlling the maximum backward movement distance of the floor brush 20 to be greater than or equal to the distance between the cleaning roller 30 and the suction port 53. In some other embodiments of this application, corresponding to first controlling the floor brush 20 to move forward and then controlling the floor brush 20 to move backward, since the floor brush 20 has already moved forward a certain distance when it starts to move backward, the absolute distance the floor brush 20 moves backward is the difference between the distance the floor brush 20 moves backward and the distance it moves forward. That is, the difference between the distance the floor brush 20 moves backward and the distance the floor brush 20 moves forward is greater than or equal to the distance between the cleaning roller 30 and the suction port 53. Corresponding to first controlling the floor brush 20 to move backward and then controlling the floor brush 20 to move forward, since the floor brush 20 is still in the initial position when it starts to move backward, the absolute distance the floor brush 20 moves backward is the maximum distance the floor brush 20 moves backward, which is independent of the subsequent process of the floor brush 20 moving forward. That is, the maximum distance the floor brush 20 moves backward is greater than or equal to the distance between the cleaning roller 30 and the suction port 53. Since the wastewater 300 flowing down from the suction channel to the surface 200 to be cleaned usually exits from the suction port 53, the suction port 53 retains the most wastewater 300. Controlling the absolute distance the floor brush 20 moves backward to be greater than or equal to the distance between the cleaning roller 30 and the suction port 53 allows the cleaning roller 30 to wipe away the residual wastewater at the suction port 53, ensuring a cleaning effect. Further, controlling the distance the floor brush 20 moves backward to be greater than or equal to the distance between the cleaning roller 30 and the suction port 53; or, controlling the difference between the distance the floor brush 20 moves backward and the distance it moves forward to be greater than or equal to the distance between the cleaning roller 30 and the suction port is merely an example in this application embodiment. In some other embodiments of this application, the distance the floor brush 20 moves backward may also be greater than or equal to the diameter of the cleaning roller 30; or, controlling the difference between the distance the floor brush 20 moves backward and the distance it moves forward to be greater than or equal to the diameter of the cleaning roller 30.

[0064] Since the wastewater flowing down the self-suction channel and dripping from the self-cleaning roller onto the surface to be cleaned will move around the floor brush, the control method of the surface cleaning device provided in this embodiment controls the floor brush to move forward and / or backward after receiving the shutdown signal, which can better clean the wastewater flowing to the front and / or back of the floor brush.

[0065] Example 4

[0066] Embodiment 4 of this application provides a control method for a surface cleaning device. Please refer to... Figure 8 Compared with the aforementioned Embodiment 1, the control method of the surface cleaning device provided in Embodiment 4 also includes steps S101 and S102. The difference is that Embodiment 4 further includes:

[0067] Step S105: In response to receiving the shutdown signal, control the scraping assembly to be in the first position, and control the cleaning roller 30 to rotate alternately in both forward and reverse directions for a duration of t3.

[0068] In this fourth embodiment, before executing step S102 to control the scraping assembly 21 to be in the second position, the scraping assembly 21 is first controlled to be in the first position, and the cleaning roller 30 is controlled to rotate alternately in both forward and reverse directions for a duration of t3. During this process, the scraping assembly 21 comes into contact with the cleaning roller 30, and the alternating forward and reverse rotation of the cleaning roller 30 for a duration of t3 can scrape off the dirt on the cleaning roller 30 through the scraping assembly 21. At the same time, the suction fan 51 continues to run, sucking the dirt scraped off from the cleaning roller 30 into the sewage tank 52 for collection.

[0069] In this fourth embodiment, the t3 duration can also be a pre-set fixed duration, such as the duration set at the factory when the surface cleaning device leaves the factory, or a user-defined duration. Alternatively, in some other embodiments of this application, the t3 duration can be determined based on the moisture content of the cleaning roller 30. For example, an image of the cleaning roller 30 can be captured by a camera, and then the moisture content of the cleaning roller 30 can be determined based on the captured image using image processing technology. The specific t3 duration for the alternating forward and reverse rotation of the cleaning roller 30 can then be determined based on the moisture content of the cleaning roller 30.

[0070] In this step, the scraping assembly 21 is controlled to be in the first position, which is the final position of the scraping assembly 21. Specifically, if the scraping assembly 21 is not initially in the first position, but is in the second position or between the first and second positions, the scraping assembly 21 is controlled to move to the first position; if the scraping assembly 21 is initially in the first position, the scraping assembly 21 is controlled to remain in the first position.

[0071] Specifically, the duration t3 for controlling the cleaning roller 30 to rotate alternately in both directions can be as follows: First, control the cleaning roller 30 to rotate forward at a first speed N1. After a period of time, control the cleaning roller 30 to rotate in reverse at a second speed N2, where N2 ≥ N1. During this process, the suction fan 51 continues to operate. In this fourth embodiment, for example, the cleaning roller 30 can be controlled to rotate forward at a first speed N1 = 500 revolutions per minute for 1 second, and then controlled to rotate in reverse at a second speed N2 = 300 revolutions per minute for 0.5 seconds. During this process, the suction fan 51 continues to operate.

[0072] Compared with related technologies, in the control method of the surface cleaning device provided in this embodiment four, before controlling the scraping component 21 to move to the second position, the scraping component 21 is first controlled to be in the first position. At this time, the residual liquid in the liquid supply pipe can be allowed to flow out by inertia and be absorbed by the cleaning roller 30. At the same time, the cleaning roller 30 is controlled to first rotate forward at 500 rpm (this speed is the normal speed during normal cleaning operation) for a certain period of time, such as 1 second, to rinse the cleaning roller 30 with residual clean water. The scraping component 21 in the first position can scrape off the sewage on the cleaning roller 30. The sewage is scraped off by the scraping component 21. After being scraped and squeezed, the wastewater is thrown towards the suction port 53. At this time, since the suction fan 51 is still running at its normal cleaning power, such as 55W, the scraped wastewater can be directly sucked away by the suction fan 51. Then, the cleaning roller 30 is reversed at a speed of 300rpm for a certain period of time, such as 0.5s. After the cleaning roller 30 reverses, the wastewater squeezed out by the scraping component 21 moves in the opposite direction and is thrown towards the roller brush cover to clean the roller brush cover. This not only makes full use of the clean water remaining in the liquid supply pipe and avoids this water from flowing out and dripping directly onto the surface to be cleaned after the machine is turned off, but also reduces the cleaning roller 30's rotation speed. To determine the water content, the above process can be repeated two or three times. Then, the scraping assembly 21 is moved to the second position. During the movement of the scraping assembly 21, dirt in the roller brush cavity near the scraping assembly 21 and dirt near the suction port will be loosened due to the movement of the scraping assembly 21. At this time, the cleaning roller 30 is controlled to rotate forward again at a higher speed, such as 600 rpm, and the suction fan 51 operates at a higher working power (such as 95w) for 1 second. The loosened dirt or liquid is then thrown towards the suction port 53 along with the rotation of the cleaning roller 30. At the same time, the dirt or liquid is thrown towards the suction port 53 along with the rotation of the cleaning roller 30. As the cleaning roller 30 rotates, the floor brush 20 moves back and forth, absorbing the remaining water and throwing it towards the suction port 53. The suction fan 51 continues to work, collecting the wastewater into the collection bucket. Then, the suction fan 51 stops working, and the cleaning roller 30 rotates forward at a low speed, for example, controlling the cleaning roller 30 to rotate forward at a speed of 200 rpm. For example, the cleaning roller 30 works for 1 second, while the floor brush 20 moves slowly, thus fully absorbing the remaining liquid. Then, the cleaning roller 30 stops rotating, the floor brush 20 stops moving back and forth, and the surface cleaning device stops upright. The total delay of the surface cleaning device is 5 seconds. Controlling the cleaning roller 30 to rotate at a low speed before stopping upright not only increases the time the cleaning roller 30 stays in the liquid area, allowing the cleaning roller 30 to better absorb the remaining wastewater, but also reduces the inertia of the floor brush, making it easier for the surface cleaning device to stop upright.The technical solution of this application results in a lower water content in the cleaning roller 30 before actual shutdown. The cleaning roller 30 can achieve a better cleaning effect on the residual sewage on the surface to be cleaned 200 after the subsequent scraping component 21 moves to the second position. In addition, during the alternating forward and reverse rotation of the cleaning roller 30, sewage or dirt adhering to the cavity wall of the roller brush cavity 10 and near the suction port 53 can also be cleaned. At the same time, during the movement of the scraping component 21 between the first and second positions, the dirt adhering to the cleaning roller 30 can also be loosened, especially the hair wrapped around the cleaning roller 30, which is convenient for the next step of collection and cleaning.

[0073] Example 5

[0074] Embodiment 5 of this application provides a control method for a surface cleaning device. Please refer to... Figure 9 Compared with the aforementioned Embodiment 1, the control method of the surface cleaning device provided in Embodiment 5 also includes steps S101 and S102. The difference is that Embodiment 5 further includes:

[0075] Step S106: In response to receiving a power-off signal, control the floating scraper 60 to stop after it is in a low position.

[0076] Please refer to Figure 10 and Figure 11 In this fifth embodiment, the surface cleaning device further includes a floating scraper 60, which is located in front of the cleaning roller 30. The floating scraper 60 includes, for example, a floating scraper 60. Figure 10 The floating scraper 60, which is at least partially in contact with the cleaning roller 30 and is detached from the surface to be cleaned 200, also includes, as shown, a high position. Figure 11 The low position shown is in contact with the surface to be cleaned and in clearance fit with the cleaning roller 30.

[0077] In this fifth embodiment, the floating scraper 60 is controlled to be in a low position, that is, the final position of the floating scraper 60 is a low position. Specifically, if the floating scraper 60 is not initially in a low position, such as in a high position or between a low and a high position, then the floating scraper 60 is controlled to move to a low position; if the floating scraper 60 is initially in a low position, then the floating scraper 60 is controlled to continue to be in a low position.

[0078] Furthermore, in some other embodiments of this application, after controlling the floating scraper 60 to be in a low position, the floating scraper 60 can also be controlled to move along the surface to be cleaned 200. Specifically, controlling the floating scraper 60 to move along the surface to be cleaned 200 can be done by independently controlling the floating scraper 60 to move along the surface to be cleaned 200, that is, only the floating scraper 60 moves along the surface to be cleaned 200; or it can be done by controlling the movement of the floor brush 20, thereby driving the floating scraper 60 to move along the surface to be cleaned 200, etc.

[0079] Furthermore, in this embodiment, the floor brush stops moving before the cleaning roller 30 stops rotating; and the suction fan 51 stops operating before the floor brush stops moving. Specifically, in this embodiment, the cleaning roller 30 can be controlled to stop rotating after 5 seconds, the floor brush can be controlled to stop moving after 4 seconds, and the suction fan can be controlled to stop operating after 3 seconds, starting from the moment the shutdown signal is received. During this process, the suction fan 51 can, for example, operate at a power of 95W (W1) before receiving the shutdown signal, and at a power of 250W (W2) after receiving the shutdown signal.

[0080] Compared with related technologies, after receiving the shutdown signal, the floating scraper 60 is controlled to stop when it is in a low position. Since the floating scraper 60 is in a low position and abuts against the surface to be cleaned 200 and is in clearance fit with the cleaning roller 30, the floating scraper 60 can form a closed cavity structure with the surface to be cleaned 200 and the cleaning roller 30. The suction effect of the suction fan 51 in the cavity structure is better, thereby improving the cleaning effect of residual sewage on the surface to be cleaned. Alternatively, after receiving the shutdown signal, the floating scraper 60 is controlled to move along the surface to be cleaned 200 when it is in a low position, so that the surface of the surface to be cleaned 200 can be further wiped.

[0081] Furthermore, such as Figure 12 As shown, the surface cleaning device may further include a support rib 80 disposed on the rear side of the floor scraper 70. The floor scraper 70 is located on the lower side of the floor brush 20 near the suction port 53, and the support rib is only on the back side of the floor scraper 70 away from the cleaning roller 30. In some embodiments of this application, in response to receiving a shutdown command, the support rib 80 is also controlled to abut against the surface 200 to be cleaned, so that at least a portion of the floor scraper 70 is in contact with the surface 200 to be cleaned, thereby forming a suction nozzle communicating with the suction port 53 through the gap between the floor scraper 70 and the cleaning roller 30. Dirt or debris on the surface 200 to be cleaned enters the suction port 53 through the suction nozzle and the roller brush cavity 10 under the action of the suction fan 51, and is sucked into the wastewater tank 52 for collection.

[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a surface cleaning device, the surface cleaning device comprising a floor brush having a brush cavity, a cleaning roller disposed within the brush cavity, and a liquid supply system for supplying liquid to the cleaning roller, the floor brush comprising a scraping assembly having a first position abutting against the cleaning roller and a second position having a gap with the cleaning roller, characterized in that, The control method for the surface cleaning device includes: In response to receiving a shutdown signal, the liquid supply system is controlled to stop supplying liquid, the scraping assembly is controlled to be in the second position, and the cleaning roller is controlled to continue rotating for a duration of t1.

2. The control method for the surface cleaning device according to claim 1, wherein the surface cleaning device further includes a suction system with a suction fan, characterized in that, The method for controlling the surface cleaning device further includes controlling the scraping assembly to be in the second position: Control the sewage suction fan to continue running for t2 hours.

3. The control method of the surface cleaning device according to claim 2, characterized in that, The control of the sewage suction fan to continue running for t2 time includes: Obtain the operating power W1 of the suction fan before receiving the shutdown signal; Control the suction fan to continue running at a power of W2 for a duration of t2, where W2 ≥ W1.

4. The control method of the surface cleaning device according to claim 1, characterized in that, Also includes: In response to receiving a power-off signal, the ground brush is controlled to move backward; And / or, control the ground brush to move forward.

5. The control method of the surface cleaning device according to claim 4, characterized in that, The moving speed of the floor brush tends to decrease as the duration of receiving the shutdown signal increases.

6. The control method of the surface cleaning device according to claim 4, characterized in that, The roller brush cavity includes a suction port, and the cleaning roller is spaced apart from the suction port; controlling the floor brush to move backward includes: The distance the floor brush moves backward is greater than or equal to the distance between the cleaning roller and the suction port; or, the difference between the distance the floor brush moves backward and the distance the floor brush moves forward is greater than or equal to the distance between the cleaning roller and the suction port.

7. The control method of the surface cleaning device according to claim 2, characterized in that, Also includes: In response to receiving a power-off signal, control the floor brush to move backward, and / or control the floor brush to move forward; The floor brush stops moving before the cleaning roller stops rotating; The suction fan stops operating before the floor brush stops moving.

8. The control method of the surface cleaning device according to claim 1, characterized in that, Also includes: In response to receiving a shutdown signal, the scraping assembly is controlled to be in the first position, the cleaning roller is controlled to rotate alternately in both forward and reverse directions for a duration of t3, and the scraping assembly is controlled to move to the second position.

9. The control method of the surface cleaning device according to claim 1, characterized in that, The floor brush further includes a floating scraper, which has a high position that is detached from the surface to be cleaned and at least partially abuts against the cleaning roller, and a low position that abuts against the surface to be cleaned and is in clearance fit with the cleaning roller. The control method of the surface cleaning device further includes: In response to receiving a power-off signal, the floating scraper is controlled to stop after being in the low position, or the floating scraper is controlled to move along the surface to be cleaned after being in the low position.

10. The control method of the surface cleaning device according to claim 1, characterized in that, Controlling the scraping assembly to be in the second position includes: If the duration of receiving the shutdown signal reaches t4, the scraping component is controlled to be in the second position; or, if the duration of the liquid supply system stopping liquid supply reaches t4, the scraping component is controlled to be in the second position.

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