A self-cleaning method for a surface cleaning system

Abstract

The application provides a self-cleaning method of a surface cleaning system, the surface cleaning system comprising a surface cleaning device and a cleaning assembly, the surface cleaning device comprising a cleaning roller, a dirt collecting box and a scraping flow guide located above the dirt collecting box, the scraping flow guide being in interference fit with the cleaning roller and guiding the dirt liquid scraped from the cleaning roller to fall into the dirt collecting box, the cleaning assembly being provided with a cleaning tank for accommodating the cleaning roller and cleaning liquid and a dirt collecting cavity, the dirt collecting box being provided with a dirt outlet and a valve for controlling opening and closing of the dirt outlet, and the self-cleaning method comprising the following steps: opening the valve to make the dirt collecting box and the dirt collecting cavity communicate through the opened dirt outlet; switching the cleaning roller from a first speed N1 to a second speed N2 within a preset time, the second speed N2 being greater than the first speed N1, so that the liquid drop falling point generated by the scraping flow guide extruding the cleaning roller approaches the dirt outlet direction from the outer edge of the dirt collecting box. The cleaning system and the self-cleaning method of the application realize self-cleaning of the dirt collecting box and improve user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cleaning equipment, and specifically provides a self-cleaning method of a surface cleaning system. BACKGROUND

[0002] With the improvement of people's living standards, various surface cleaning devices gradually enter people's daily life, providing great convenience for the cleaning of house floors. A type of existing surface cleaning device is provided with a cleaning roller, a dirt collecting box and a scraping flow guide. The cleaning roller is in rolling contact with the surface to be cleaned to wipe the surface to be cleaned. The scraping flow guide scrapes the rotating cleaning roller, and the dirt absorbed by the cleaning roller is scraped off and flows into the dirt collecting box. In order to facilitate the cleaning of the cleaning roller of the surface cleaning device, more and more surface cleaning devices are also provided with a cleaning assembly. When the cleaning roller needs to be cleaned, the surface cleaning device is placed in the cleaning tank of the cleaning assembly, and the rotating cleaning roller can complete self-cleaning.

[0003] Although the existing surface cleaning device can complete the self-cleaning of the cleaning roller by using the cleaning assembly, the dirt collecting box for collecting dirt still needs to be manually cleaned by the user, which increases the cleaning work of the user and also easily causes hygiene problems, resulting in poor user experience. SUMMARY

[0004] In order to solve the above problems in the prior art, that is, to solve the problem that the dirt collecting box of the existing surface cleaning device needs to be manually cleaned by the user, the present application provides a self-cleaning method of a surface cleaning system, the surface cleaning system comprising a surface cleaning device and a cleaning assembly, the surface cleaning device comprising a cleaning roller, a dirt collecting box and a scraping flow guide located above the dirt collecting box, the scraping flow guide being in interference fit with the cleaning roller and guiding the dirt liquid scraped from the cleaning roller to fall into the dirt collecting box, the cleaning assembly being provided with a cleaning tank for accommodating the cleaning roller and cleaning liquid and a dirt collecting cavity, the dirt collecting box being provided with a dirt discharge port and a valve for controlling the opening and closing of the dirt discharge port, the self-cleaning method comprising: an opening valve step of opening the valve to make the dirt collecting box and the dirt collecting cavity communicate through the opened dirt discharge port; a flushing step of switching the cleaning roller from a first speed N1 to a second speed N2 within a predetermined time, the second speed N2 being greater than the first speed N1, so that the liquid drop points scraped by the scraping flow guide from the cleaning roller approach the dirt discharge port from the outer edge of the dirt collecting box.

[0005] Optionally, the self-cleaning method further comprises a cleaning step of switching the cleaning roller from a third speed N3 to a fourth speed N4 within a predetermined time, the fourth speed N4 being less than the third speed N3, so that the liquid drop points scraped by the scraping flow guide from the cleaning roller approach the outer edge of the dirt collecting box from the dirt discharge port.

[0006] Optionally, the switching mode of the rotation speed of the cleaning roller comprises: stepwise changing the voltage of the driving motor of the cleaning roller to change the rotation speed of the cleaning roller.

[0007] Optionally, the switching mode of the rotation speed of the cleaning roller comprises: continuously changing the voltage of the driving motor of the cleaning roller to change the rotation speed of the cleaning roller.

[0008] Optionally, the self-cleaning method further comprises a circulation step: judging whether a preset cleaning condition is reached, if not, circulating the flushing step and the cleaning step; if yes, ending the cleaning.

[0009] Optionally, the flushing step further comprises: supplying liquid to the cleaning roller, and the cleaning roller is switched from a first speed N1 to a second speed N2 within a preset time; or,

[0010] stopping supplying liquid to the cleaning roller, and the cleaning roller is switched from a first speed N1 to a second speed N2 within a preset time.

[0011] Optionally, the cleaning step further comprises: supplying liquid to the cleaning roller, and the cleaning roller is switched from a third speed N3 to a fourth speed N4 within a preset time; or,

[0012] stopping supplying liquid to the cleaning roller, and the cleaning roller is switched from a third speed N3 to a fourth speed N4 within a preset time.

[0013] Optionally, the surface cleaning device comprises a spraying assembly for providing cleaning liquid to the cleaning roller.

[0014] Optionally, the cleaning assembly is provided with a driving part, and the opening valve comprises: the driving part drives the valve to be opened when the surface cleaning device is placed on the cleaning assembly.

[0015] Optionally, the surface cleaning device is provided with a driving device for driving the valve to be opened, and the opening valve comprises: the driving device drives the valve to be opened when the surface cleaning device is placed on the cleaning assembly.

[0016] It can be understood by those skilled in the art that the self-cleaning method of the surface cleaning system of the foregoing application has at least the following beneficial effects:

[0017] By setting a dirt collecting cavity in the cleaning assembly, and setting a dirt outlet and a valve for controlling the opening and closing of the dirt outlet in the dirt collecting box, after the surface cleaning device is placed in the cleaning assembly, the opened valve makes the dirt collecting box and the dirt collecting cavity communicate through the dirt outlet. At this time, the cleaning roller rotates in the cleaning tank containing cleaning liquid, and switches from the first speed N1 to the second speed N2 within a preset time. The liquid absorbed by the cleaning roller is squeezed out by the scraping flow guide and falls into the dirt collecting box. Because the cleaning roller is improved from the lower first speed N1 to the second speed N2, the liquid flow squeezed out by the scraping flow guide first falls on the outer edge of the dirt collecting box at low speed, and then flows into the dirt collecting cavity from the dirt outlet along the outer edge, the side wall and the bottom wall, thereby washing the outer edge and the side wall of the dirt collecting box. With the increase of the rotating speed of the cleaning roller, the falling point of the liquid flow squeezed out by the scraping flow guide approaches the dirt outlet, that is, directly washing the bottom wall of the dirt collecting box. At the same time, the high rotating speed also ensures the cleaning effect of the cleaning roller, so that the cleaning roller realizes self-cleaning in the cleaning tank, and also realizes self-cleaning of the dirt collecting box, reduces the cleaning work of the user, and improves the user experience. Moreover, the self-cleaning of the dirt collecting box covers most of the area of the dirt collecting box, so that the outer edge, the side wall and other cleaning dead angles of the dirt collecting box are also well cleaned, avoiding the dirt sticking to the outer edge and the side wall due to long time without cleaning, thereby reducing the secondary cleaning work of the user.

[0018] Further, by switching the cleaning roller from the third speed N3 to the fourth speed N4 within a preset time, the falling point of the liquid flow squeezed out by the scraping flow guide can be changed from directly washing the bottom wall of the dirt collecting box to falling on the outer edge of the dirt collecting box, thereby washing the outer edge and the side wall of the dirt collecting box. Moreover, the first speed N1 is less than the second speed N2, and by making the third speed N3 greater than the fourth speed N4, it is also convenient for the connection between the flushing step and the cleaning step.

[0019] Further, by making the flushing step and the cleaning step cycle, the cleaning effect of the cleaning roller can be better, and the liquid flow squeezed out by the scraping flow guide can be cleaner and cleaner, thereby increasing the cleaning times of the outer edge and the side wall of the dirt collecting box, and making the cleaner and cleaner liquid flow wash the outer edge and the side wall of the dirt collecting box, thereby improving the cleaning effect of the dirt collecting box. BRIEF DESCRIPTION OF DRAWINGS

[0020] Some embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0021] Figure 1 is a structural schematic diagram of a surface cleaning device in the first embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of a machine body in the first embodiment of the present application;

[0023] Figure 3is a structure diagram of a partial surface cleaning system in the first embodiment of the present application Figure 1 ;

[0024] Figure 4 is a structure diagram of a partial surface cleaning system in the first embodiment of the present application Figure 2 ;

[0025] Figure 5 is a diagram showing the change of the driving motor voltage and the cleaning roller rotation speed in the first embodiment of the present application

[0026] Figure 6 is a diagram showing the steps of the self-cleaning method of the surface cleaning system in the first embodiment of the present application

[0027] Figure 7 is a diagram showing the change of the driving motor voltage and the cleaning roller rotation speed in the second embodiment of the present application

[0028] Figure 8 is a diagram showing the steps of the self-cleaning method of the surface cleaning system in the third embodiment of the present application

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 11, machine body; 111, scraping flow guide; 12, handle rod; 13, cleaning roller; 14, dirt collecting box; 141, drainage part; 142, dirt outlet; 143, valve; 15, spraying assembly; 151, cleaning water tank; 152, delivery pump; 153, spraying nozzle

[0031] 21, cleaning tank; 22, dirt collecting cavity; 23, driving part DETAILED DESCRIPTION

[0032] Those skilled in the art should understand that the embodiments described below are only part of the embodiments of the present application, rather than all the embodiments of the present application, and are intended to explain the technical principles of the present application, rather than limit the protection scope of the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the protection scope of the present application.

[0033] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be further pointed out that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The present application provides a self-cleaning method of a surface cleaning system, the surface cleaning system comprising a surface cleaning device and a cleaning assembly, the surface cleaning device comprising a cleaning roller, a dirt collecting box and a scraping flow guide located above the dirt collecting box, the scraping flow guide being interference fitted with the cleaning roller and guiding the dirt liquid scraped from the cleaning roller to fall into the dirt collecting box, the cleaning assembly being provided with a cleaning tank for accommodating the cleaning roller and cleaning liquid and a dirt collecting cavity, the dirt collecting box being provided with a dirt outlet and a valve for controlling the opening and closing of the dirt outlet, the self-cleaning method comprising: opening the valve to make the dirt collecting box and the dirt collecting cavity communicate through the opened dirt outlet; the cleaning roller is switched from a first speed N1 to a second speed N2 within a preset time, the second speed N2 being greater than the first speed N1, so that the liquid drop falling point generated by the scraping flow guide extruding the cleaning roller approaches from the outer edge of the dirt collecting box to the direction of the dirt outlet.

[0036] This application incorporates a sludge collection chamber within the cleaning assembly, and a drain outlet and valve for controlling the opening and closing of the drain outlet within the sludge collection box. After the surface cleaning device is placed within the cleaning assembly, the opened valve connects the sludge collection box and the sludge collection chamber through the drain outlet. At this time, the cleaning roller rotates in a cleaning tank filled with cleaning fluid, switching from a first speed N1 to a second speed N2 within a preset time. The scraping guide member, by scraping and squeezing the rotating cleaning roller, can expel the liquid absorbed by the cleaning roller, causing it to fall into the sludge collection box. This is because the cleaning roller increases from the lower first speed N1 to the second speed N2. Therefore, the liquid squeezed out by the scraping guide first falls on the outer edge of the sludge collection box, flowing along the outer edge, side walls, and bottom wall until it enters the sludge collection chamber from the drain outlet. This flushes and cleans the outer edge and side walls of the sludge collection box. As the cleaning roller's speed increases, the point of impact of the liquid squeezed out by the scraping guide approaches the drain outlet, directly flushing and cleaning the bottom wall of the sludge collection box. Simultaneously, the high speed ensures the cleaning effect of the cleaning roller, allowing it to self-clean within the cleaning tank while simultaneously self-cleaning the sludge collection box, reducing the user's cleaning workload and improving the user experience. Furthermore, the self-cleaning of the sludge collection box covers most of its area, ensuring that hard-to-clean areas such as the outer edge and side walls are also effectively cleaned, preventing dirt from adhering to the outer edge and side walls due to prolonged lack of cleaning, thus reducing the user's need for secondary cleaning.

[0037] It should be noted that the surface cleaning device of this application can be a handheld floor scrubber or an autonomously moving or navigation-enabled cleaning robot. The handheld floor scrubber has a body and a control lever connected to the body, allowing the user to control the direction of travel using the control lever. The cleaning robot is equipped with drive wheels and a navigation module, and the cleaning robot autonomously controls its drive wheels to move forward, turn, or reverse based on position information, obstacle information, and other information obtained from the navigation module.

[0038] The self-cleaning method of the surface cleaning system of this application will be described below with reference to the accompanying drawings and in conjunction with a handheld surface cleaning device.

[0039] The first embodiment of this application:

[0040] First refer to Figures 1 to 3 The surface cleaning apparatus and cleaning components of this embodiment will be described as shown.

[0041] like Figures 1 to 3As shown, the surface cleaning device of the embodiment includes a body 11, a handle rod 12, cleaning rollers 13, a dirt collecting box 14 and a spraying assembly 15. The handle rod 12 is pivotally connected with the body 11, and a user can hold the handle rod 12 to control the travel of the surface cleaning device. The cleaning rollers 13 are provided in pairs at the front and rear ends of the body 11, and the cleaning rollers 13 are pivotally connected with the body 11. The surface cleaning device is provided with a driving motor to drive the cleaning rollers 13 to rotate, and the rotating cleaning rollers 13 can clean the surface to be cleaned. The body 11 is provided with two scraping flow guides 111, which correspond to the two cleaning rollers 13 and are in interference fit with the two cleaning rollers 13, so as to scrape and extrude the two cleaning rollers 13. The liquid dirt scraped and extruded by the scraping flow guides 111 can fall into the dirt collecting box 14. The dirt collecting box 14 is provided with two flow guide portions 141 which respectively abut against the two cleaning rollers 13, so as to prevent the liquid dirt from flowing out. The spraying assembly 15 includes a cleaning water tank 151, a delivery pump 152 and a spraying nozzle 153. The delivery pump 152 can deliver the clean water in the cleaning water tank 151 to the spraying nozzle 153, and the clean water is sprayed from the spraying nozzle 153 to the cleaning rollers 13.

[0042] It should be noted that the cleaning roller 13 at the rear side of the body 11 generally plays a role in wiping the floor dry, so the cleaning roller 13 at the rear side of the body 11 can not be sprayed with the cleaning liquid.

[0043] As shown in Figure 2 and Figure 3 , the dirt collecting box 14 is provided with a dirt outlet 142 and a valve 143. An elastic member (such as a torsion spring, a tension spring, a spring sheet, etc.) is arranged between the valve 143 and the dirt collecting box 14, and the elastic member is used to keep the valve 143 in a position closing the dirt outlet 142. The cleaning assembly is provided with a cleaning tank 21, a dirt collecting cavity 22 and a driving portion 23. The driving portion 23 is a top column. After the surface cleaning device is placed on the cleaning assembly, the two cleaning rollers 13 are respectively accommodated in the two cleaning tanks 21, the driving portion 23 abuts against the valve 143, so as to overcome the elastic force of the elastic member to open the dirt outlet 142, so that the dirt collecting box 14 and the dirt collecting cavity 22 are communicated through the dirt outlet 142. The cleaning roller 13 rotates in the cleaning tank 21 for cleaning, and the liquid flow generated by the scraping and extruding of the scraping flow guides 111 enters the dirt collecting box 14 and then enters the dirt collecting cavity 22 from the dirt outlet 142.

[0044] The self-cleaning method of the embodiment will be described in detail below. Figures 1 to 6

[0045] As shown in Figure 6 , the self-cleaning method of the embodiment includes a valve opening step, a flushing step, a cleaning step and a circulation step.

[0046] Valve opening step: opening the valve 143, so that the dirt collecting box 14 and the dirt collecting cavity 22 are communicated through the opened dirt outlet 142. ​

[0047] Specifically, after the surface cleaning device is placed on the cleaning assembly, the driving portion 23 abuts against the valve 143 to open the valve 143. It can be understood that the valve can also be opened by electric driving of the driving device.

[0048] The rinsing step: liquid is supplied to the cleaning roller 13, the cleaning roller 13 is switched from the first speed N1 to the second speed N2 within a preset time, the second speed N2 is greater than the first speed N1, so that the liquid flow falling point generated by the scraping flow guide 111 scraping the cleaning roller 13 approaches from the outer edge of the dirt collecting box 14 to the drain 142.

[0049] Specifically, the user pours cleaning liquid into the cleaning tank 21, and the cleaning liquid in the cleaning tank 21 at least covers a part of the cleaning roller 13, so that the cleaning roller 13 can absorb the cleaning liquid in the cleaning tank 21 to realize self-cleaning. And, the spraying assembly 15 can also supply liquid to the cleaning roller 13 at the same time.

[0050] The cleaning roller 13 rotates in the cleaning tank 21, wherein the cleaning roller 13 on the front side of the body 11 rotates counterclockwise (as shown by the dashed arrow in Figure 3 , the cleaning roller 13 on the rear side of the body 11 rotates clockwise (as shown by the dashed arrow in Figure 3 , in combination with Figure 5 , the voltage of the driving motor changes step by step to the voltage V, so that the cleaning roller 13 rotates from the lower first speed N1 to the higher second speed N2 within a preset time, during which the scraping flow guide 111 scrapes the cleaning roller 13, which can extrude the liquid absorbed by the cleaning roller 13, as shown by the solid arrow in Figure 3 , when the rotating speed of the cleaning roller 13 is low, the extruded liquid flow falls on the outer edge of the dirt collecting box 14 (i.e. the drainage part 141, which can also be said to be the joint of the dirt collecting box 14 and the cleaning roller 13), then flows along the drainage part 141, the sidewall of the dirt collecting box 14, the bottom wall of the dirt collecting box 14 to the drain 142, and then flows into the dirt collecting cavity 22 from the drain 142, thereby flushing and cleaning the outer edge, sidewall of the dirt collecting box 14. As shown by the solid arrow in Figure 4 , when the rotating speed of the cleaning roller 13 is high, the extruded liquid flow directly falls on the bottom wall of the dirt collecting box 14, and then flows into the dirt collecting cavity 22 from the drain 142, and at the same time, when the rotating speed of the cleaning roller 13 is high, the cleaning effect is better.

[0051] The skilled in the art can understand that, by switching the cleaning roller 13 from the first speed N1 to the second speed N2, the liquid flow generated by the scraping of the scraping flow guide 111 can wash the outer edge and the side wall of the dirt collection box at low speed, and at high speed, the cleaning effect of the cleaning roller 13 is ensured, so that the cleaning roller 13 realizes self-cleaning in the cleaning tank 21, and also realizes self-cleaning of the dirt collection box 14, reduces the cleaning work of the user, and improves the user experience. And the self-cleaning of the dirt collection box 14 covers most of the area of the dirt collection box 14, so that the outer edge, the side wall and other cleaning dead angles of the dirt collection box 14 are also well cleaned, avoiding the dirt sticking due to long time without cleaning, thereby reducing the user's secondary cleaning work.

[0052] It should be noted that the first speed N1 can be the speed at which the liquid flow just falls on the joint of the dirt collection box 14 and the cleaning roller 13, or can be a lower speed, that is, the scraped liquid flow first flows along the cleaning roller 13 and then falls on the joint of the dirt collection box 14 and the cleaning roller 13, as long as the liquid flow can fall on the joint of the dirt collection box 14 and the cleaning roller 13. In addition, the cleaning roller 13 is switched from the first speed N1 to the second speed N2 within a preset time, and the preset time can represent the entire length of the flushing step, or can be part of the length of the flushing step.

[0053] It should be further noted that the voltage of the driving motor can be uniformly stepped or non-uniformly stepped, such as making the low voltage last longer to increase the cleaning time of the outer edge and the side wall of the dirt collection box 14. In other words, the duration of each speed in the change process can be different.

[0054] The cleaning step: stopping supplying liquid to the cleaning roller 13, the cleaning roller 13 is switched from the third speed N3 to the fourth speed N4 within a preset time, and the fourth speed N4 is less than the third speed N3, so that the liquid flow generated by the scraping of the cleaning roller 13 by the scraping flow guide 111 falls from the sewage outlet 142 to the outer edge of the dirt collection box 14.

[0055] Specifically, in the flushing step, because the cleaning roller 13 constantly absorbs the cleaning liquid in the cleaning tank 21 and is constantly extruded by the scraping flow guide 111 and flows into the dirt collection cavity 22, when the cleaning time of the flushing step is reached, the cleaning liquid in the cleaning tank 21 cannot contact the cleaning roller 13, and at the same time, the spraying assembly 15 stops supplying liquid to the cleaning roller 13.

[0056] The cleaning roller 13 continues to rotate in the cleaning tank 21, combined with Figure 5As shown, the voltage of the driving motor is stepped down, so that the cleaning roller 13 is switched from the third speed N3 to the fourth speed N4 in a preset time, wherein the third speed N3 is equal to the second speed N2, and the fourth speed N4 is equal to the first speed N1. During this period, the scraping flow guide 111 scrapes the cleaning roller 13, although the cleaning roller 13 can no longer absorb the cleaning liquid, but part of the liquid is still stored in the cleaning roller 13, at this time, the scraping flow guide 111 can squeeze out the remaining liquid, that is, to scrape the cleaning roller 13. Similarly, when the rotating speed of the cleaning roller 13 is low, the scraped liquid flow falls on the outer edge of the dirt collection box 14, and then flows along the drainage portion 141, the side wall of the dirt collection box 14, and the bottom wall of the dirt collection box 14 to the sewage outlet 142, and then flows into the sewage collection cavity 22 from the sewage outlet 142, thereby washing the outer edge and the side wall of the dirt collection box 14.

[0057] It should be noted that the third speed N3 can also be greater than the second speed N2, or less than the second speed N2, that is, the rotating speed of the cleaning roller 13 is increased or decreased to N3 before the end of the flushing step, or is increased or decreased to N3 at the beginning of the cleaning step. Similarly, the fourth speed N4 can also be greater than the first speed N1, or less than the first speed N1. In addition, the voltage image of the flushing step and the cleaning step can be symmetrical or asymmetrical. In addition, the cleaning roller 13 is switched from the third speed N3 to the fourth speed N4 in a preset time, which can represent the entire length of the cleaning step, or can be a part of the length of the cleaning step.

[0058] It should also be noted that the voltage of the driving motor can be uniformly stepped, or can be non-uniformly stepped, such as increasing the duration of high voltage to increase the scraping cleaning effect on the cleaning roller 13.

[0059] The cycle step: judging whether the preset cleaning condition is reached, if not, the flushing step and the cleaning step are cyclically executed; if yes, the cleaning is ended.

[0060] Specifically, the preset cleaning condition includes but is not limited to the following modes:

[0061] Example 1: The total cleaning time is preset, and the cleaning is stopped when the total cleaning time is reached.

[0062] Example 2: The number of revolutions of the cleaning roller 13 required in the entire self-cleaning process is preset, and the number of revolutions of the cleaning roller 13 is collected by a sensor, and when the number of revolutions of the cleaning roller 13 reaches the preset number of revolutions, it is determined that the preset cleaning condition is reached.

[0063] Example 3: A sewage sensor is arranged at the sewage outlet 142, and when it is detected that the liquid flowing out of the sewage outlet 142 meets the requirements (such as PH value, ion concentration, etc.), it is determined that the preset condition is reached.

[0064] It should be noted that, in the cycle, the supply of cleaning liquid to the cleaning roller 13 can be that the user re-adds cleaning liquid into the cleaning tank 21, or that the cleaning liquid is supplied only by means of the spraying assembly 15.

[0065] As can be understood by those skilled in the art, by providing the sump chamber 22 in the cleaning assembly and the drain opening 142 in the sump box 14, after the surface cleaning device is placed in the cleaning assembly, the opened valve 143 makes the sump box 14 and the sump chamber 22 communicate through the drain opening 142, at this time, the cleaning roller 13 rotates in the cleaning tank 21 containing the cleaning liquid, in the flushing step, because the cleaning roller 13 is increased from the lower first speed N1 to the second speed N2, the liquid flow generated by the scraping of the scraping flow guide 111 can flush and clean the outer edge and the side wall of the sump box at low speed, and at the same time, the cleaning effect of the cleaning roller 13 is ensured at high speed. Then, in the cleaning step, by switching the cleaning roller 13 from the higher third speed N3 to the fourth speed N4 within a preset time, the outer edge and the side wall of the sump box 14 can be flushed again, at the same time, the change of the driving motor is more in line with the working principle, avoiding damage to the driving motor caused by excessive change, and facilitating the connection between the flushing step and the cleaning step.

[0066] The embodiment utilizes the flushing step and the cleaning step to realize self-cleaning of the cleaning roller 13 in the cleaning tank 21, and also realizes self-cleaning of the sump box 14, reduces the cleaning work of the user, and improves the user experience. Moreover, the self-cleaning of the sump box 14 covers most of the area of the sump box 14, so that the outer edge, the side wall and other dead angles of the sump box 14 are also well cleaned, avoiding the dirt sticking to the outer edge and the side wall due to long time without cleaning, thereby reducing the work of the user for secondary cleaning.

[0067] Further, by making the flushing step and the cleaning step cycle, the cleaning effect of the cleaning roller 13 can be better, and at the same time, the liquid flow squeezed out by the scraping flow guide 111 will be cleaner and cleaner, which improves the cleaning times of the outer edge and the side wall of the sump box 14, and makes the cleaner and cleaner liquid flow flush the outer edge and the side wall of the sump box, thereby improving the cleaning effect of the sump box 14.

[0068] Further, by stopping the supply of liquid to the cleaning roller 13 in the cleaning step, the cleaning roller 13 can be finally scraped dry, avoiding mildew caused by damp storage of the cleaning roller 13.

[0069] Second embodiment of the present application:

[0070] As shown in Figure 7 different from the first embodiment, in the flushing step and the cleaning step, the voltage of the driving motor is continuously changed, so that the speed of the cleaning roller is changed.

[0071] It should be noted that the rising or falling part of the voltage image can be constant slope or variable slope image, such as making the low voltage part of the image more moderate in the flushing step, or making the high voltage part of the image more moderate in the cleaning step.

[0072] It should also be noted that the flushing step and the cleaning step can adopt different voltage change modes, that is, one is stepwise and the other is continuous change.

[0073] The third embodiment of the present application:

[0074] As Figure 8 different from the first embodiment and the second embodiment, the self-cleaning method of the present embodiment comprises:

[0075] S1: open the valve 143 to make the dirt collecting box 14 communicate with the dirt collecting cavity 22 through the opened dirt outlet 142.

[0076] S2: supply liquid to the cleaning roller 13, and the cleaning roller 13 switches from the first speed N1 to the second speed N2 within a preset time, the second speed N2 being greater than the first speed N1, so as to make the liquid flow drop point generated by the scraping flow guide member 111 extruded by the cleaning roller 13 approach from the outer edge of the dirt collecting box 14 to the direction of the dirt outlet 142.

[0077] S3: supply liquid to the cleaning roller 13, and the cleaning roller 13 switches from the third speed N3 to the fourth speed N4 within a preset time, the fourth speed N4 being less than the third speed N3, so as to make the liquid flow drop point generated by the scraping flow guide member 111 extruded by the cleaning roller 13 approach from the direction of the dirt outlet 142 to the outer edge of the dirt collecting box 14.

[0078] S4: stop supplying liquid to the cleaning roller 13, and the cleaning roller 13 switches from the first speed N1 to the second speed N2 within a preset time, the second speed N2 being greater than the first speed N1, so as to make the liquid flow drop point generated by the scraping flow guide member 111 extruded by the cleaning roller 13 approach from the outer edge of the dirt collecting box 14 to the direction of the dirt outlet 142.

[0079] S5: determine whether the preset cleaning condition is reached, if not, the flushing step and the cleaning step are executed in a loop; if yes, the cleaning is ended.

[0080] In other words, different from the first embodiment, the present embodiment needs to execute the process of low to high and high to low rotation speed before the cleaning liquid in the cleaning tank is used up, and then the cleaning roller is scraped dry in the low to high rotation speed stage.

[0081] It should be noted that the skilled in the art can set the cleaning liquid in the cleaning tank to be used up after executing any number of low to high or high to low rotation speed changes as needed.

[0082] It is also necessary to point out that for the first embodiment, the second embodiment and the third embodiment, the control module can be built-in in the surface cleaning device to automatically control the cleaning roller to be cleaned in cycles, or the user can start the cleaning and end the cleaning after one cycle unit is executed, and the user can start the cleaning again.

[0083] The fourth embodiment of the present application is as follows:

[0084] Although not shown in the figure, unlike the first embodiment, the embodiment only executes the flushing step and the cleaning step once to end the cleaning.

[0085] The fifth embodiment of the present application is as follows:

[0086] Although not shown in the figure, unlike the first embodiment, the embodiment only executes the flushing step once to end the cleaning.

[0087] The sixth embodiment of the present application is as follows:

[0088] Although not shown in the figure, unlike the first embodiment, the surface cleaning device of the embodiment is provided with a driving device to drive the valve to open the drain, and no driving part is arranged on the cleaning assembly. Exemplarily, the driving device is an electromagnet arranged on the bottom wall of the dirt collecting box, and a magnet is fixedly installed on the end of the valve away from the drain. When the drain needs to be opened, the electromagnet is powered to attract the magnet on the valve, so as to force the valve to rotate to a position to open the drain by the magnetic force between the electromagnet and the magnet.

[0089] The seventh embodiment of the present application is as follows:

[0090] Although not shown in the figure, unlike the foregoing embodiments, the surface cleaning device of the embodiment is only provided with one cleaning roller. Referring to the structures in the foregoing embodiments, it can be regarded that the cleaning roller on the rear side of the machine body is cancelled, and only the cleaning roller on the front side of the machine body is left. The single roller structure of the embodiment is also applicable to the self-cleaning method described in the foregoing embodiments, and will not be described here.

[0091] So far, the technical solutions of the present application have been described in combination with the foregoing embodiments. However, it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to these specific embodiments. Those skilled in the art can split and combine the technical solutions in the foregoing embodiments, or make equivalent changes or replacements to the related technical features, without departing from the technical principles of the present application. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A self-cleaning method of a surface cleaning system, the surface cleaning system comprising a surface cleaning device and a cleaning assembly, the surface cleaning device comprising a cleaning roller, a dirt collection bin and a scraping flow guide located above the dirt collection bin, the scraping flow guide being interference fit with the cleaning roller and guiding the dirt liquid scraped from the cleaning roller to fall into the dirt collection bin, the cleaning assembly being provided with a cleaning tank for accommodating the cleaning roller and a cleaning liquid and a dirt collection cavity, characterized in that, The self-cleaning method comprises the following steps: Valve opening step: opening the valve to connect the dirt collecting box and the dirt collecting cavity through the opened drain outlet; The flushing step: the cleaning roller switches from the first speed N1 to the second speed N2 within a preset time, and the second speed N2 is greater than the first speed N1, so that the liquid drop point generated by the scraping flow guide member extruding the cleaning roller approaches from the outer edge of the dirt collecting box to the direction of the drain outlet.

2. The self-cleaning method of a surface cleaning system according to claim 1, wherein, The self-cleaning method further comprises: The cleaning step: the cleaning roller switches from the third speed N3 to the fourth speed N4 within a preset time, and the fourth speed N4 is less than the third speed N3, so that the liquid drop point generated by the scraping flow guide member extruding the cleaning roller approaches from the drain outlet to the outer edge of the dirt collecting box.

3. The self-cleaning method of a surface cleaning system according to claim 1 or 2, characterized in that, The switching mode of the cleaning roller speed comprises: The voltage of the driving motor of the cleaning roller is changed step by step, so that the speed of the cleaning roller changes.

4. The self-cleaning method of a surface cleaning system according to claim 1 or 2, characterized in that, The switching mode of the cleaning roller speed comprises: The voltage of the driving motor of the cleaning roller is changed continuously, so that the speed of the cleaning roller changes.

5. The self-cleaning method of a surface cleaning system according to claim 2, wherein, The self-cleaning method further comprises: The cycle step: whether the preset cleaning condition is reached is judged, if not, the flushing step and the cleaning step are cyclically executed; if yes, the cleaning is ended.

6. The self-cleaning method of a surface cleaning system according to claim 1, wherein, The flushing step further comprises: Supplying liquid to the cleaning roller, and the cleaning roller switches from the first speed N1 to the second speed N2 within a preset time; or Stopping supplying liquid to the cleaning roller, and the cleaning roller switches from the first speed N1 to the second speed N2 within a preset time.

7. The self-cleaning method of a surface cleaning system according to claim 2, wherein, The cleaning step further comprises: Supplying liquid to the cleaning roller, and the cleaning roller switches from the third speed N3 to the fourth speed N4 within a preset time; or Stopping supplying liquid to the cleaning roller, and the cleaning roller switches from the third speed N3 to the fourth speed N4 within a preset time.

8. The self-cleaning method of a surface cleaning system according to claim 1, wherein, The surface cleaning device comprises a spraying assembly for providing cleaning liquid to the cleaning roller.

9. The self-cleaning method of a surface cleaning system according to claim 1, wherein, The cleaning assembly is provided with a driving part, and the valve opening step comprises: The driving part drives the valve to be opened when the surface cleaning device is placed on the cleaning assembly.

10. The self-cleaning method of a surface cleaning system according to claim 1, wherein, The surface cleaning device is provided with a driving device for driving the valve to be opened, and the valve opening step comprises: The driving device drives the valve to be opened when the surface cleaning device is placed on the cleaning assembly.

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