Control method of surface cleaning device

Abstract

The invention provides a control method of a surface cleaning device, the surface cleaning device comprises a ground brush and a machine body, the machine body comprises a sewage suction fan, a sewage tank and a liquid level detection assembly of the sewage tank, and the method comprises the steps that S1, a shutdown signal and liquid level information detected by the liquid level detection assembly are obtained; and S2, according to the liquid level information and the shutdown signal, the working state of the sewage suction fan after the shutdown signal is triggered is determined. According to the scheme, the problem that the surface cleaning device breaks down due to the fact that the sewage suction fan sucks sewage in the shutdown process is solved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a control method for a surface cleaning device. Background Art

[0002] A household floor scrubber generally includes a body and a floor brush pivotally connected to the body, wherein the body includes a sewage tank and a sewage suction fan. When the household floor scrubber is turned off, the sewage suction fan is usually left running for a period of time to suck the sewage in the pipe into the sewage tank to prevent the sewage in the pipe from flowing back and re-contaminating the floor. However, in the prior art, the sewage suction fan continues to run for a fixed power and a fixed duration after being turned off. During this process, the liquid level in the sewage tank may fluctuate or the sewage tank may be full of liquid due to continuous sewage suction. The sewage suction fan that continues to run at a fixed power may suck in the sewage, causing the household floor scrubber to malfunction. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a control method for a surface cleaning device, so as to avoid the problem that the surface cleaning device malfunctions due to sewage being sucked in by a sewage suction fan during shutdown.

[0004] On the one hand, the present application provides a control method for a surface cleaning device, the surface cleaning device comprising a floor brush and a body, the body comprising a sewage suction fan, a sewage tank and a liquid level detection component of the sewage tank, the method comprising:

[0005] Step S1: obtaining a shutdown signal and liquid level information detected by a liquid level detection component;

[0006] Step S2: determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal.

[0007] In one embodiment, determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal includes:

[0008] After the shutdown signal is obtained, if liquid level fluctuation information is obtained, the sewage suction motor is turned off;

[0009] The liquid level fluctuation information includes: when the liquid level information reaches a first preset value and lasts for a first preset time, the sewage suction fan is turned off.

[0010] In one embodiment, determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal includes:

[0011] If the liquid level information reaches a second preset value before the shutdown signal is obtained, the sewage suction fan is turned off after the shutdown signal is obtained.

[0012] In one embodiment, the method further comprises:

[0013] During the floor cleaning process performed by the surface cleaning device, if the liquid level information reaches a first preset value and the duration reaches a second preset duration, the dirt suction fan is turned off; wherein the second preset duration is greater than the first preset duration.

[0014] In one embodiment, the method further comprises:

[0015] After acquiring the shutdown signal, determining whether the shutdown signal is triggered by an upright switch of the surface cleaning device;

[0016] If yes, control the sewage suction fan to operate at a first power;

[0017] If not, the sewage suction fan is controlled to operate at a second power; wherein the first power is less than the second power.

[0018] In one embodiment, the method further comprises:

[0019] If the shutdown signal is triggered by the upright switch, after controlling the sewage suction fan to operate at the first power for a third preset time, the sewage suction fan is controlled to operate at the second power for a fourth preset time.

[0020] In one embodiment, the method further comprises:

[0021] During the time when the sewage suction fan operates at the second power, if an upright switch signal is detected, the sewage suction fan is controlled to operate at the third power; wherein the third power is less than the second power.

[0022] In one embodiment, the method further comprises:

[0023] The interval time of triggering the upright switch signal after the non-upright switch triggers the shutdown signal is obtained, and the third power is determined based on the interval time; wherein the third power is proportional to the interval time, and the shorter the interval time, the smaller the third power.

[0024] In one embodiment, the method further comprises:

[0025] After the upright switch signal is detected and the sewage suction fan is controlled to operate at the third power for a fifth preset time period, the sewage suction fan is controlled to operate at the second power for a sixth preset time period.

[0026] In one embodiment, the method further comprises:

[0027] After the sewage suction fan is turned off, the status of the sewage tank is monitored. If it is detected that the user has dumped the sewage tank, the sewage suction fan is controlled to start and run for a seventh preset time period. The monitoring of the sewage tank status includes: performing an in-situ detection on the sewage tank. If it is detected that the sewage tank has been removed and then reloaded, and the liquid level information of the reloaded sewage tank is less than a preset value, it is determined that the user has dumped the sewage tank.

[0028] 1. In the present application, the working state of the sewage suction fan is controlled according to the shutdown signal and the liquid level information detected by the liquid level detection component. During the delayed shutdown process of the sewage suction fan after receiving the shutdown signal, the working state of the sewage suction fan can be adjusted according to the liquid level condition in the sewage barrel and the shutdown signal, and the operating power, operating time and other parameters of the sewage suction fan can be flexibly adjusted according to the liquid level condition in the sewage tank.

[0029] If there is a risk of water entering the sewage suction fan if the sewage suction fan continues to run after shutdown based on the liquid level information detected when the shutdown signal is obtained, the sewage suction fan is directly shut down after the shutdown signal is obtained.

[0030] If liquid level fluctuation information is obtained during the operation of the sewage suction fan after the shutdown signal is obtained, the sewage suction fan will be shut down to reduce the risk of water entering the sewage suction fan.

[0031] According to the shutdown signal and liquid level information, the operating power of the sewage suction fan is controlled to reduce the residual sewage in the sewage suction pipe, reduce the risk of water ingress to the sewage suction fan, and extend its service life.

[0032] 2. In the present application, when the sewage suction fan continues to run after the surface cleaning device is shut down, if it is detected that the sewage in the sewage tank reaches a first preset value and continues for a first preset time, there is a risk of liquid being sucked into the sewage suction fan. The sewage suction fan can be turned off to avoid the sewage suction fan from sucking in sewage due to the vibration of the liquid level in the sewage tank, which may cause the surface cleaning device to malfunction.

[0033] Optionally, after the sewage suction fan stops running for a period of time, the sewage suction fan can be turned on again to continue to suck the residual liquid in the sewage suction pipe to prevent the liquid in the sewage suction pipe from flowing back to the ground.

[0034] 3. The present application scheme obtains the liquid level information before the surface cleaning device is shut down, and predicts the impact of the liquid level vibration in the sewage bucket on the sewage suction fan when the device is shut down based on the liquid level information in the sewage tank. If the sewage volume in the sewage tank reaches a second preset value, the sewage suction fan can be directly shut down when the shutdown signal is received, thereby avoiding the problem of sewage being sucked in due to the body shaking when the shutdown signal is triggered and the sewage suction fan continuing to work after shutdown.

[0035] Optionally, after receiving the shutdown signal for a period of time, the fuselage body changes from a tilted state to an upright state for a period of time. After the liquid level in the sewage tank that was agitated by the shaking of the fuselage body returns to calm, the sewage suction fan is turned on again and works for a period of time to suck out the residual liquid in the sewage suction pipe to prevent the dirty liquid from flowing back to the surface to be cleaned and causing pollution.

[0036] 4. When cleaning the surface to be cleaned, in order to avoid false alarms, when it is detected that the liquid level information reaches the first preset value and the duration of the liquid level information reaching the first preset value reaches the second preset duration, it is considered that the sewage bucket is full of liquid at this time, and the surface cleaning device can no longer perform the cleaning operation, and the suction fan is controlled to be turned off. After the surface cleaning device receives the shutdown signal, in order to avoid the problem of water inflow to the suction fan caused by the liquid level oscillation during the process of the machine body from tilting to upright, the liquid level information in the sewage bucket needs to be obtained during the delayed operation of the suction fan. At this time, it is required that the duration of the liquid level information reaching the preset value is less than the first preset duration. Similarly, in the delayed operation of the suction fan, in order to avoid false alarms of liquid level detection, it is necessary to continuously agitate the liquid surface to reach the preset liquid level for a certain period of time, indicating that the agitated liquid surface at this time may cause water inflow to the suction fan in operation. However, the liquid level oscillation caused by the upright process is caused by the movement of the machine body, not that the sewage bucket is really full, but caused by the agitation of the liquid surface. At this time, the agitation of the liquid surface is a short-term continuous process. The liquid level information alarm caused by short-term sporadic droplets splashing onto the liquid level detection component is not enough to cause the sewage suction fan to be in danger of water ingress. In order to enable the surface cleaning device to respond to the short-term liquid full phenomenon more quickly and accurately, the first preset time length is controlled to be less than the second preset time length. While avoiding false alarms, it can effectively detect the threat of short-term liquid level agitation in the sewage bucket to the sewage suction motor.

[0037] 5. The shutdown signal of the surface cleaning device usually has a variety of triggering forms. Among them, the shutdown is triggered by the upright switch. When the shutdown signal is triggered, the body of the device can be changed from an inclined state to an upright state, and the liquid surface in the sewage bucket is agitated. Therefore, in the present application, it is determined whether the shutdown signal is triggered by the upright switch, and the sewage suction fan can be controlled to operate at different powers. When the shutdown signal is triggered by the upright switch, the sewage suction fan runs with a first power delay. If the shutdown signal is not triggered by the shutdown signal, the sewage suction fan runs with a second power delay. Among them, the first power is less than the second power. When the shutdown signal is triggered by the upright switch, the power of the sewage suction fan is reduced, which can not only prevent the backflow of dirty liquid in the sewage suction pipe, but also reduce the possibility of the sewage suction fan sucking in the vibrating sewage due to the upright body.

[0038] 6. When the shutdown signal is triggered by the upright switch, causing the liquid level in the sewage bucket to be agitated, the suction fan will first run at a relatively small first power for a period of time, and then increase the suction fan power after the liquid level in the sewage bucket tends to be calm. This can avoid the risk of the suction fan power being too high and sucking in sewage when the machine body is upright, and ensure that when the shutdown signal is triggered by the upright switch, the suction fan can run at a sufficiently large power to fully suck the sewage under the floor brush and the suction pipe into the sewage tank.

[0039] 7. In the present application, when the shutdown signal is not triggered by the upright switch, while the sewage suction fan continues to run after shutdown, if it is detected that the body is upright, the operating power of the sewage suction fan can be reduced, thereby reducing the possibility of sewage being sucked into the sewage suction fan due to the increase in the liquid level in the sewage tank.

[0040] 8. In the present application scheme, when the shutdown signal is not triggered by the upright switch, the sewage suction fan is first controlled to operate at the larger second power, and then to operate at the smaller third power when the body is upright, and to operate at the second power again after the liquid level in the sewage tank stabilizes, thereby reducing the possibility of the sewage suction fan sucking in sewage when the liquid level fluctuates greatly, and ensuring that the sewage suction fan can still work long enough after shutdown, so as to fully suck the sewage under the floor brush and in the sewage suction pipe into the sewage tank.

[0041] 9. In the present application, after the sewage suction fan is turned off, if the user removes the sewage tank, dumps the sewage, and reloads it into the sewage tank, the sewage suction fan can be controlled to restart and run for a period of time, so that the sewage in the sewage suction pipe can be sucked into the sewage tank, avoiding the sewage from being retained in the sewage suction pipe for a long time, causing the surface cleaning device to emit odor. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application are briefly introduced below.

[0043] Figure 1 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application;

[0044] Figure 2 A schematic diagram of a surface cleaning device according to an embodiment of the present application;

[0045] Figure 3 A schematic flow chart of a control method for a surface cleaning device provided in Example 1 of the present application;

[0046] Figure 4 A schematic flow chart of a control method for a surface cleaning device provided in Example 2 of the present application;

[0047] Figure 5A schematic flow chart of a control method for a surface cleaning device provided in Example 3 of the present application;

[0048] Figure 6 A schematic flow chart of a control method for a surface cleaning device provided in Example 4 of the present application;

[0049] Figure 7 A block diagram of a control device for a surface cleaning device provided in one embodiment of the present application.

[0050] Icon: 100-machine body; 200-floor brush; 300-fresh water tank; 400-sewage tank; 500-sewage suction fan. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0052] Similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] like Figure 1 As shown, this embodiment provides an electronic device 1, including: at least one processor 11 and a memory 12, Figure 1 A processor 11 is taken as an example. The processor 11 and the memory 12 are connected via a bus 10. The memory 12 stores instructions that can be executed by the processor 11. The instructions are executed by the processor 11 so that the electronic device 1 can execute all or part of the process of the method in the following embodiment. In one embodiment, the electronic device 1 can be a controller of a surface cleaning device, which is used to execute the control method of the surface cleaning device.

[0054] The memory 12 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, disk or optical disk.

[0055] The present application also provides a computer-readable storage medium, which stores a computer program. The computer program can be executed by the processor 11 to complete the control method of the surface cleaning device provided in the present application.

[0056] The present solution is applied to a surface cleaning device, which may include a floor brush and a body, and the body may include a sewage suction fan, a sewage tank, and a liquid level detection component of the sewage tank. Exemplarily, the surface cleaning device may be a handheld cleaning device such as a household floor scrubber, a mopping machine, or a household vacuum cleaner.

[0057] A surface cleaning device for cleaning a surface to be cleaned comprises a floor brush and a body pivotally connected to the floor brush. Figure 2 , is a schematic diagram of a surface cleaning device according to an embodiment of the present application. Figure 2 As shown, the surface cleaning device comprises a body 100 and a floor brush 200, wherein the body 100 is pivotally connected to the floor brush 200. The body 100 comprises a clean water tank 300, a dirty water tank 400 and a dirt suction fan 500.

[0058] The body includes a liquid supply component and a dirt suction component, which are used to supply liquid to the floor brush and collect dirt on the surface to be cleaned, respectively. The floor brush is provided with a cleaning part that rotates to wipe the surface to be cleaned. The liquid supply component includes a clean water tank for storing cleaning liquid, and a liquid supply channel connected to the clean water tank at one end for conveying cleaning liquid to the cleaning part; the dirt suction component includes a sewage bucket provided on the body for storing dirt, and a dirt suction pipe connected to the sewage bucket at one end and the cleaning part at the other end for conveying dirt, and a dirt suction fan connected to the sewage bucket for providing suction force so that dirt is sucked from the surface to be cleaned into the sewage bucket. When the surface cleaning device is working, the liquid supply component conveys cleaning liquid to the cleaning part to soak the cleaning part, and the dirt suction fan generates suction force so that the dirt / dirty liquid adhering to the cleaning part and the surface to be cleaned enters the sewage bucket through the dirt suction pipe.

[0059] Example 1

[0060] See also Figure 3 , is a flow chart of a control method for a surface cleaning device provided in Example 1 of the present application, such as Figure 3 As shown, the method may include the following steps S1-S2.

[0061] Step S1: Obtain a shutdown signal and liquid level information detected by a liquid level detection component.

[0062] When the user holds the body of the surface cleaning device and pushes and pulls the floor brush of the surface cleaning device to clean the surface to be cleaned (such as the ground), the sewage suction fan can continuously suck the sewage under the floor brush from the surface to be cleaned into the sewage tank. A liquid level detection component is provided in the sewage tank to detect the liquid level information in the sewage tank. During the cleaning operation of the surface cleaning device, if it is detected that the liquid level in the sewage tank has reached the maximum liquid level allowed by the sewage tank, the surface cleaning device is controlled to shut down or the sewage suction fan is turned off to prevent the liquid in the sewage tank from being sucked into the sewage suction fan in large quantities, causing water ingress and damage to the sewage suction fan. Optionally, the liquid level detection component in the sewage tank can be a liquid level detection component that can detect liquid level information in real time, or it can be a liquid level detection component that only detects whether the sewage in the sewage tank has reached a specific capacity. Exemplarily, the liquid level detection component can be a hydraulic detection component, a photoelectric detection component, a float detection component, an electrode detection component, etc.

[0063] In addition, during the operation of the surface cleaning device, a shutdown signal for instructing to stop the operation of the surface cleaning device can also be obtained. The shutdown signal can be actively triggered by the user, for example, by sending a shutdown signal through voice control, a handle button, or an upright switch. As an implementation of the upright switch, an upright switch is provided at the pivotal connection between the floor brush and the body. During the operation of the surface cleaning device, the body is in a tilted state. The user can trigger the upright switch by changing the body from the tilted state to the upright state, thereby shutting down the surface cleaning device.

[0064] As an implementation of this embodiment, the surface cleaning device can trigger a shutdown signal through both a handle button and an upright switch.

[0065] Step S2: determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal.

[0066] During the operation of the surface cleaning device, after the shutdown signal is obtained, the working state of the suction fan can be controlled based on the timing of the shutdown signal and the liquid level information before the shutdown signal appears or after the shutdown signal is triggered. Here, the working state may include the operating power of the suction fan and the operating time after the shutdown signal is detected. In addition, after the shutdown signal is obtained, the floor brush can be controlled to stop running.

[0067] In one embodiment, after receiving the shutdown signal, if it is determined based on the obtained liquid level information that the operation of the suction fan will not cause the risk of sucking in sewage, the suction fan can be controlled to operate for a period of time so that the suction fan can fully suck the residual sewage under the floor brush and the sewage in the sewage tank suction pipe into the sewage tank. The liquid level information obtained at this time can be the liquid level information before the shutdown signal is obtained, or it can be the liquid level information after the shutdown signal is obtained. The liquid level information can be the liquid level information obtained by real-time detection of the surface cleaning device, or it can be the liquid level information obtained at intervals.

[0068] Controlling the working state of the suction fan includes configuring the operation time / power of the suction fan according to the shutdown signal and liquid level information after obtaining the shutdown signal. Exemplarily, the duration of the suction fan after shutdown can be delayed in a range of 0.3 seconds to 10 seconds.

[0069] Through this measure, the suction fan can be controlled to continue working for a period of time, so that the residual sewage under the floor brush and the sewage in the sewage tank suction pipe can be fully sucked into the sewage tank, and when the machine body is upright after shutdown, it can avoid the sewage in the sewage tank vibrating under the action of inertia and raising the liquid level, causing the suction fan to suck in sewage, thereby avoiding malfunction when the surface cleaning device is shut down.

[0070] In one embodiment, when executing step S2, after obtaining the shutdown signal, the liquid level information is continuously or intermittently detected, and if the liquid level information reaches a first preset value and the duration reaches the first preset duration, the sewage suction fan is turned off.

[0071] Here, the first preset value can be configured based on needs. Exemplarily, the first preset value represents the maximum amount of liquid allowed to be contained in the sewage tank, for example: the first preset value is the liquid level in the sewage tank when it is full of water.

[0072] Since the first preset duration of the surface cleaning device can be configured as needed, the first preset duration represents the minimum duration required when the liquid level information detected in the sewage tank is sufficiently reliable. Exemplarily, the value range of the first preset duration is between 0.02 seconds and 3 seconds.

[0073] When the liquid level information reaches the first preset value and lasts for the first preset time, it means that the sewage level in the sewage tank reaches the first preset value. At this time, the amount of sewage is large enough and there is a risk of the sewage suction fan sucking in sewage. In this case, the sewage suction fan can be turned off.

[0074] Through the above measures, when the sewage suction fan continues to run after the surface cleaning device is shut down, if it is determined that there is enough sewage in the sewage tank and there is a risk of it being sucked in by the sewage suction fan, the sewage suction fan can be turned off to avoid the risk of sewage being sucked in and causing the surface cleaning device to malfunction.

[0075] Furthermore, in order to avoid a small amount of liquid splashed in a short time during the liquid level detection causing a false alarm of the liquid level detection component, the suction fan is controlled to be turned off after the liquid level information reaches the first preset value and lasts for the first preset time, indicating that the liquid level in the sewage tank is high at this time and there is a risk of water entering the suction fan. Similarly, when the surface cleaning device is performing normal cleaning operations. When it is detected that the liquid level information reaches the first preset value and lasts for the second preset time, the suction fan is controlled to be turned off. Among them, the second preset time is greater than the first preset time. During the delayed operation of the suction fan, the shaking of the fuselage may cause the liquid level in the sewage tank to be agitated, thereby causing water to enter the running suction fan. However, the liquid level oscillation caused by the upright process is caused by the movement of the fuselage, not because the sewage bucket is really full of liquid, but because of the agitation of the liquid level. At this time, the agitation of the liquid level is a short-term continuous process. The liquid level information alarm caused by the short-term sporadic splashing of droplets onto the liquid level detection component is not enough to cause the suction fan to be in danger of water entering. In order to enable the surface cleaning device to respond to the short-term liquid full phenomenon more quickly and accurately, the first preset time length is controlled to be shorter than the second preset time length. While avoiding false alarms, the threat posed by short-term liquid surface agitation in the sewage bucket to the sewage suction motor can be effectively detected.

[0076] As an optional solution of this embodiment, during the delayed operation of the sewage suction fan, the sewage suction fan is shut down due to the turbulent liquid level. If the operation time of the sewage suction fan is less than the preset delay operation time of the sewage suction fan, after the sewage suction fan is shut down for a period of time, when the liquid level in the sewage tank fluctuates less, the sewage suction fan is turned on again and runs for a period of time, thereby reducing the residual sewage liquid in the sewage suction pipe and reducing the probability of sewage liquid flowing back to the surface to be cleaned.

[0077] Preferably, during the delayed operation of the sewage suction fan, the operating time of the sewage suction fan before it is shut down due to liquid surface agitation is T1, and the operating time of the sewage suction fan after it is restarted is T2, and T1+T2 is the fixed delayed operation time of the sewage suction fan. This measure can reduce the residual dirty liquid in the sewage suction pipe and reduce the probability of dirty liquid flowing back to the surface to be cleaned.

[0078] Example 2

[0079] In one embodiment, after the shutdown signal is obtained in step S1, it can also be determined whether the shutdown signal is triggered by the upright switch of the surface cleaning device, and the operating power of the suction fan is selected based on the determination result. Figure 4 , is a flow chart of a control method for a surface cleaning device provided in Example 2 of the present application, such as Figure 4 As shown, the method may include the following steps 410 to 430.

[0080] Step 410: After obtaining the shutdown signal, determine whether the shutdown signal is triggered by the upright switch of the surface cleaning device.

[0081] Step 420: If yes, control the sewage suction fan to operate at the first power.

[0082] Step 430: If not, control the sewage suction fan to operate at a second power; wherein the first power is less than the second power.

[0083] When the shutdown signal is triggered by the upright switch, it can be considered that the fuselage changes from an inclined state to an upright state at the same time as the shutdown signal is triggered. At this time, the liquid level in the sewage tank is agitated, and the liquid will be raised under the action of inertia. If it is detected that the liquid level in the sewage tank reaches the first preset value and continues for the first preset time, the sewage suction fan is controlled to be turned off. If it is not detected that the sewage tank liquid level reaches the first preset value, or although it is detected that the sewage tank liquid level reaches the first preset value but the liquid level does not continue to reach the first preset time, then although there may be an agitated liquid surface in the sewage tank at this time, the liquid splashing height is not high, and the probability of water entering the sewage suction fan is low. At this time, the sewage suction fan can be controlled to operate. Preferably, at this time, the sewage suction fan is controlled to operate at a first power that is less than the second power under the general shutdown signal, which can reduce the possibility of sewage with a raised liquid level being sucked into the sewage suction fan, thereby reducing safety hazards. When the shutdown signal is not triggered by the upright switch, it can be considered that the sewage tank level has not been raised (for example, the user may not have stood the machine upright for a while after shutting down the machine by pressing a button). In this case, the sewage suction motor can be controlled to operate at the second power to suck the sewage into the sewage tank. For example, the first power can be 120W, 130W, 150W, etc.; the second power can be 160W, 180W, 250W, etc.

[0084] The shutdown signal of the surface cleaning device can have a variety of triggering forms, among which the shutdown is triggered by the upright switch, and the body can be changed from an inclined state to an upright state at the same time as the shutdown signal is triggered. At this time, the liquid surface in the sewage bucket is agitated, and the liquid level is raised, which increases the possibility of the sewage suction fan sucking in sewage. Therefore, in the present application scheme, it is determined whether the shutdown signal is triggered by the upright switch, and the sewage suction fan can be controlled to operate at different powers. When the shutdown signal is triggered by the upright switch, the sewage suction fan runs with a first power delay. If the shutdown signal is not triggered by the shutdown signal, the sewage suction fan runs with a second power delay. Among them, the first power is less than the second power. When the shutdown signal is triggered by the upright switch, the power of the sewage suction fan is reduced, which can not only prevent the backflow of dirty liquid in the sewage suction pipe, but also reduce the possibility of the sewage suction fan sucking in oscillating sewage due to the upright body.

[0085] As an implementation of this embodiment, the sewage suction fan operates at the fourth power during the operation of the surface cleaning device, so that at least the second power is greater than the fourth power. Even after receiving the shutdown signal, the sewage suction fan operates at a power higher than that during the floor scrubbing operation. On the one hand, it quickly collects dirt from the sewage suction pipe, the residue of the cleaning parts, and the surface to be cleaned in a short time, shortens the operation time of the sewage suction fan, increases the endurance of the whole machine, and reduces the impact of liquid surface agitation on the operation of the sewage suction fan. On the other hand, there may be some corners or dead corners in the sewage suction pipe connecting the cleaning parts and the sewage tank that are easy to hide dirt. After receiving the shutdown signal, the power of the sewage suction fan is increased to clean the sewage suction pipe. The strong suction force absorbs the dirt and dirty liquid in the sewage suction pipe to prevent the dirty liquid from flowing back to the ground and re-contaminating the surface to be cleaned. At the same time, the sewage suction pipe is cleaned to avoid odor.

[0086] In this embodiment, when determining whether the shutdown signal is triggered by the upright switch, and then controlling the operation of the sewage suction fan according to the determination result, if the shutdown signal is triggered by the upright switch, after controlling the sewage suction fan to operate at the first power for the third preset time, the sewage suction fan can be controlled to operate at the second power for the fourth preset time. Here, the third preset time and the fourth preset time can be configured as needed. Exemplarily, the value range of the third preset time is between 0.3 seconds and 5 seconds. The value range of the fourth preset time is between 0.3 seconds and 10 seconds.

[0087] In this case, when the shutdown signal is triggered by the upright switch, it can be considered that the sewage tank liquid level will be raised in the initial state, so the sewage suction fan operates at a smaller first power. After the first power operation reaches a third preset time, it can be considered that the liquid level in the sewage tank is stable at this time, and the sewage suction fan can be operated at a larger second power.

[0088] This measure can avoid the risk of the suction fan being too powerful and sucking in sewage when the machine body is upright, and can also ensure that when the shutdown signal is triggered by the upright switch, the suction fan can operate with sufficiently large power to fully suck the sewage under the floor brush and the suction pipe into the sewage tank.

[0089] In this embodiment, if the shutdown signal is not triggered by the upright switch, after the shutdown signal is obtained and the liquid level information does not reach the first preset value, the sewage suction fan is controlled to operate at the second power. At this time, the user controls the surface cleaning device to shut down by means of a handle button or other non-upright switch. Therefore, when the shutdown signal is obtained, the fuselage remains in an inclined state, and the fuselage does not undergo a large position change. Similarly, the amplitude of the liquid level in the sewage tank is limited. Therefore, the sewage suction fan can be controlled to operate at a higher second power at this time. During the operation of the sewage suction fan, it is continuously detected whether the upright switch signal is obtained. On the one hand, if the upright switch signal is not detected, it can be explained that the user did not place the fuselage upright after shutting down. In this case, the liquid level in the sewage tank fluctuates little or not, and the sewage suction fan can be controlled to continue to operate at the second power. If the upright switch signal is detected during operation, it means that the user places the fuselage upright after shutting down. Due to the inertia caused by the upright process of the fuselage, the liquid level in the sewage tank will fluctuate and raise the liquid level, and the sewage suction fan can be controlled to operate at the third power. Here, the third power is less than the second power.

[0090] Through this measure, when the shutdown signal is not triggered by the upright switch, while the sewage suction fan continues to run after shutdown, if it is detected that the fuselage is upright, the operating power of the sewage suction fan can be reduced, thereby reducing the possibility of sewage being sucked into the sewage suction fan due to the increase in the sewage tank liquid level.

[0091] In one embodiment, if the shutdown signal is not triggered by the upright switch, and the upright switch signal is detected during the time when the sewage suction fan is running at the second power, the interval time after the upright switch signal is triggered after the shutdown signal is triggered by the non-upright switch can be obtained, and the third power is determined based on the interval time. The third power is proportional to the interval time, and the shorter the interval time, the smaller the third power.

[0092] Here, the shorter the interval time, the faster the machine stands upright after shutdown, and accordingly, the greater the fluctuation of the liquid level in the sewage tank. At this time, determining a smaller third power can reduce the possibility of the suction fan sucking in the raised sewage. If the interval time is longer, it means that the machine stands upright slower after shutdown, and accordingly, the fluctuation of the liquid level in the sewage tank is smaller. At this time, determining a larger third power can ensure the suction effect while preventing the sewage from being sucked into the suction fan.

[0093] Through this measure, the operating power of the sewage suction fan can be controlled more accurately, minimizing the possibility of the sewage suction fan sucking in sewage.

[0094] In this embodiment, if the shutdown signal is not triggered by the upright switch, and the upright switch signal is detected during the time when the sewage suction fan runs at the second power, then after the upright switch signal is detected and the sewage suction fan is controlled to run at the third power for the fifth preset time, the sewage suction fan can be controlled to run at the second power for the sixth preset time.

[0095] Here, the fifth preset time and the sixth preset time can be configured as needed. Alternatively, the fifth preset time can be configured as needed, and the sixth preset time can be obtained by subtracting the fifth preset time and the actual time of the suction fan running at the second power from the originally configured time for the suction fan to continue running after shutdown.

[0096] Through this measure, when the shutdown signal is not triggered by the upright switch, the sewage suction fan is first controlled to operate at the larger second power, and then to operate at the smaller third power when the fuselage is upright, and then to operate at the second power again after the liquid level in the sewage tank stabilizes. This can reduce the possibility of the sewage suction fan sucking in sewage when the liquid level fluctuates greatly, and ensure that the sewage suction fan can still work long enough after shutdown, so as to fully suck the sewage under the floor brush and in the sewage suction pipe into the sewage tank.

[0097] Example 3

[0098] See also Figure 5 , is a flow chart of a control method for a surface cleaning device provided in Example 3 of the present application, such as Figure 5 As shown, the method may include the following steps S1-S2.

[0099] Step S1: Obtain a shutdown signal and liquid level information detected by a liquid level detection component.

[0100] The specific execution process of step S1 refers to the relevant description above and will not be repeated here.

[0101] Step S2: determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal, including: if the liquid level information reaches a second preset value before obtaining the shutdown signal, the sewage suction fan is turned off after obtaining the shutdown signal.

[0102] When executing step S2, if the liquid level information reaches the second preset value before the shutdown signal is obtained, the sewage suction fan can be turned off after the shutdown signal is obtained. Here, the second preset value is less than the first preset value, and the second preset value can be configured based on needs. Exemplarily, the second preset value is the liquid level when the water volume in the sewage tank reaches 95%.

[0103] Before the shutdown signal is received, the liquid level information has reached the second preset value. Before the shutdown signal is received, the sewage suction fan is still continuously sucking sewage into the sewage tank. When the shutdown signal is received, there is already enough sewage in the sewage tank, and there is a risk of the sewage suction fan sucking sewage. In this case, the sewage suction fan can be turned off.

[0104] Through the above measures, before the surface cleaning device is shut down, if the amount of sewage in the sewage tank is large enough, the sewage suction fan can be directly turned off when the shutdown signal is received, thereby avoiding the problem of sewage being sucked in due to the shaking of the body when the shutdown signal is triggered and the sewage suction fan continuing to work after shutdown.

[0105] Optionally, after receiving the shutdown signal for a period of time, if the upright switch is detected to be triggered, after the upright switch is triggered and the body changes from a tilted state to an upright state for a period of time, since the liquid level in the sewage tank no longer fluctuates, the sewage suction fan can be restarted to suck out the residual liquid in the sewage suction pipe to prevent the dirty liquid from flowing back to the surface to be cleaned and causing contamination.

[0106] Example 4

[0107] See also Figure 6 , is a flow chart of a control method for a surface cleaning device provided in Example 4 of the present application, such as Figure 6 As shown, the method may include the following steps 610 to 620.

[0108] Step 610: After the sewage suction fan is turned off, the status of the sewage tank is monitored. If it is detected that the user is dumping the sewage tank, the sewage suction fan is controlled to start and run for a seventh preset time.

[0109] Step 620: wherein monitoring the status of the sewage tank includes: performing an in-situ detection on the sewage tank, and if it is detected that the sewage tank is removed and then reloaded, and the liquid level information of the reloaded sewage tank is less than a preset value, it is determined that the user has dumped the sewage tank.

[0110] Here, the in-situ detection refers to detecting whether the sewage tank is in the position of the sewage tank in the body of the surface cleaning device, and the in-situ detection can be achieved by pressing the sensor. The preset value can be configured as needed, and for example, the preset value is the liquid level corresponding to 10% of the capacity of the sewage tank.

[0111] If the sewage tank is always in place during the monitoring process, or the sewage tank is removed and then reinstalled, but the liquid level information of the sewage tank is not less than the preset value, it can be determined that the user has not dumped the sewage tank. In this case, no processing is required.

[0112] If, during the monitoring of the sewage tank status, it is detected that the user dumps the sewage tank, the sewage suction fan can be controlled to start and run for the seventh preset time. Here, the seventh preset time can be configured as needed.

[0113] Through the above measures, after the sewage suction fan is turned off, if the user removes the sewage tank, dumps the sewage, and reloads it into the sewage tank, the sewage suction fan can be controlled to restart for a period of time, so that the sewage in the sewage suction pipe can be sucked into the sewage tank, avoiding the sewage from being retained in the sewage suction pipe for a long time, causing the surface cleaning device to emit odor.

[0114] In addition, in this embodiment, the monitoring process of the sewage tank state can be limited by the first waiting time and the second waiting time, because if the user removes the sewage tank long after the sewage suction fan stops, and reinstalls the sewage tank long after the sewage tank is removed, the sewage in the sewage suction pipe has dried up, and restarting the sewage suction fan is meaningless. Here, the first waiting time and the second waiting time can be configured as needed. Exemplarily, the value range of the first waiting time is between 1 second and 600 seconds. The value range of the second waiting time is between 1 second and 600 seconds.

[0115] After the sewage suction fan is turned off, if it is detected that the sewage tank is removed within the first waiting period, it can be determined whether the sewage tank is reloaded within the second waiting period starting from the removal of the sewage tank. If the sewage tank is reloaded within the second waiting period, it can be determined whether the liquid level information of the sewage tank is less than a preset value, and the sewage suction fan is restarted if the liquid level information is less than the preset value. If the sewage suction fan is not removed within the first waiting period after the sewage suction fan is turned off, the shutdown process ends and the sewage suction fan is not restarted. Alternatively, if the sewage tank is not reloaded within the second waiting period starting from the removal of the sewage tank, the shutdown process ends and the sewage suction fan is not restarted.

[0116] The aforementioned embodiments can be flexibly combined as needed.

[0117] Figure 7 is a block diagram of a shutdown device for a surface cleaning device according to an embodiment of the present invention. Figure 7 As shown, the device may include:

[0118] An acquisition module 710 is used to acquire a shutdown signal and liquid level information detected by a liquid level detection component;

[0119] The control module 720 is used to determine the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal.

[0120] The implementation process of the functions and effects of each module in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the control method of the above-mentioned surface cleaning device, and will not be repeated here.

[0121] In several embodiments provided in the present application, the disclosed devices and methods may also be implemented in other ways. The device embodiments described above are merely schematic, for example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram may represent a module, a program segment or a part of a code, and a module, a program segment or a part of a code contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0122] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

Claims

1. A control method for a surface cleaning device, the surface cleaning device comprising a floor brush and a body, the body comprising a sewage suction fan, a sewage tank and a liquid level detection component of the sewage tank, characterized in that: The method comprises: Step S1: obtaining a shutdown signal and liquid level information detected by a liquid level detection component; Step S2: determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal.

2. The control method of the surface cleaning device according to claim 1, characterized in that: The method of determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal includes: After the shutdown signal is obtained, if liquid level fluctuation information is obtained, the sewage suction motor is turned off; The liquid level fluctuation information includes: the liquid level information reaches a first preset value and the duration reaches a first preset duration.

3. The control method of the surface cleaning device according to claim 1, characterized in that: The method of determining the working state of the sewage suction fan after the shutdown signal is triggered according to the liquid level information and the shutdown signal includes: If the liquid level information reaches a second preset value before the shutdown signal is obtained, the sewage suction fan is turned off after the shutdown signal is obtained.

4. The control method of the surface cleaning device according to claim 2, characterized in that: The method further comprises: During the floor cleaning process performed by the surface cleaning device, if the liquid level information reaches a first preset value and the duration reaches a second preset duration, the dirt suction fan is turned off; wherein the second preset duration is greater than the first preset duration.

5. The control method of the surface cleaning device according to claim 1, characterized in that: The method further comprises: After acquiring the shutdown signal, determining whether the shutdown signal is triggered by an upright switch of the surface cleaning device; If yes, control the sewage suction fan to operate at a first power; If not, the sewage suction fan is controlled to operate at a second power; wherein the first power is less than the second power.

6. The control method of the surface cleaning device according to claim 5, characterized in that: The method further comprises: If the shutdown signal is triggered by the upright switch, after controlling the sewage suction fan to operate at the first power for a third preset time, the sewage suction fan is controlled to operate at the second power for a fourth preset time.

7. The control method of the surface cleaning device according to claim 5, characterized in that: The method further comprises: During the time when the sewage suction fan operates at the second power, if an upright switch signal is detected, the sewage suction fan is controlled to operate at the third power; wherein the third power is less than the second power.

8. The control method of the surface cleaning device according to claim 7, characterized in that: The method further comprises: The interval time of triggering the upright switch signal after the non-upright switch triggers the shutdown signal is obtained, and the third power is determined based on the interval time; wherein the third power is proportional to the interval time, and the shorter the interval time, the smaller the third power.

9. The control method of the surface cleaning device according to claim 7, characterized in that: The method further comprises: After the upright switch signal is detected and the sewage suction fan is controlled to operate at the third power for a fifth preset time period, the sewage suction fan is controlled to operate at the second power for a sixth preset time period.

10. The control method of a surface cleaning device according to any one of claims 1 to 9, characterized in that: The method further comprises: After the sewage suction fan is turned off, the status of the sewage tank is monitored. If it is detected that the user has dumped the sewage tank, the sewage suction fan is controlled to start and run for a seventh preset time period. The monitoring of the sewage tank status includes: performing an in-situ detection on the sewage tank. If it is detected that the sewage tank has been removed and then reloaded, and the liquid level information of the reloaded sewage tank is less than a preset value, it is determined that the user has dumped the sewage tank.

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