Surface cleaning device and method of controlling the same

Abstract

The application discloses a surface cleaning device and a control method thereof. The surface cleaning device comprises a water tank provided with a sewage cavity, a machine body comprising a vacuum fan communicated with the sewage cavity, and a control assembly electrically connected to the vacuum fan, configured to detect a dumping degree of the machine body and adjust a rotating speed of the vacuum fan according to the dumping degree, the rotating speed having a decreasing trend with the increasing of the dumping degree. The technical scheme provided by the application aims to solve the technical problem that sewage is easy to be sprayed out of the surface cleaning device when the machine body is in a flat lying state.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to a surface cleaning device and its control method. Background Technology

[0002] With technological advancements and social progress, more and more families are using robotic mops instead of traditional mops for floor cleaning. Unlike traditional sweeping and vacuuming, mopping requires water or other liquid cleaning agents to effectively clean the floor. Therefore, robotic mops typically include a clean water tank for storing clean water or cleaning solution. Since wastewater needs to be collected along with the wastewater, most robotic mops also have a wastewater tank for storing both wastewater and waste. The wastewater tank is usually mounted on the main body of the robotic mop.

[0003] When some existing mopping machines clean the areas under beds and sofas, the machine needs to lie at a large angle or even flat. At this time, the sewage in the sewage tank is prone to splashing. The splashed sewage will be carried up by the air and sprayed out of the mopping machine. Summary of the Invention

[0004] The main objective of this invention is to provide a surface cleaning device that addresses the technical problem of wastewater easily spraying out of the surface cleaning device when the machine is lying flat.

[0005] The surface cleaning device includes:

[0006] The water tank is equipped with a sewage chamber;

[0007] The machine body includes a vacuum fan connected to the sewage chamber; and

[0008] A control component, electrically connected to the vacuum blower, is configured to detect the degree of tilt of the machine body and adjust the speed of the vacuum blower according to the degree of tilt, wherein the speed tends to decrease as the degree of tilt increases.

[0009] In one illustrative embodiment, the control component includes

[0010] An angle detection component is used to detect the degree of tilting; and

[0011] The control module, electrically connected to the angle detection component and the vacuum fan, is configured to adjust the speed of the vacuum fan according to the degree of tilting, wherein the speed tends to decrease as the degree of tilting increases.

[0012] In one illustrative embodiment, the angle detection component is a gyroscope, which is used to measure the tilt angle of the fuselage;

[0013] The smaller the tilt angle, the greater the degree of tilting of the fuselage.

[0014] In one illustrative embodiment, the surface cleaning device further includes a floor brush hinged to one end of the body;

[0015] The angle detection component is an angular displacement sensor or an encoder;

[0016] The angle detection component is used to measure the angle between the machine body and the floor brush. The larger the angle, the greater the degree of tilting of the machine body.

[0017] In one illustrative embodiment, the angular displacement sensor is a rheostat-type angular displacement sensor, an area-changing capacitive angular displacement sensor, or a magnetoresistive angular displacement sensor.

[0018] In one illustrative embodiment, the surface cleaning device further includes a floor brush hinged to one end of the body;

[0019] The angle detection component includes a magnet disposed on the ground brush and a Hall sensor disposed on the body of the machine.

[0020] The Hall sensor is used to measure the magnetic field strength of the magnet;

[0021] The angle between the machine body and the floor brush corresponds to the magnetic field strength; the larger the angle, the greater the degree of tilting of the machine body.

[0022] In one illustrative embodiment, the control component further includes a liquid level detection component electrically connected to the control module;

[0023] The liquid level detection component is used to detect the liquid level height inside the sewage chamber;

[0024] The control module is also configured to adjust the speed of the vacuum fan only when the current tilting degree reaches or exceeds a preset tilting degree and the current liquid level reaches or exceeds a preset liquid level.

[0025] In one illustrative embodiment, the surface cleaning device further includes a floor brush hinged to one end of the body;

[0026] The control component is a stepless speed control switch;

[0027] The main unit of the stepless speed control switch is connected to the machine body, and the adjustment knob of the stepless speed control switch is connected to the floor brush;

[0028] The stepless speed control switch is configured such that when the angle between the machine body and the floor brush is greater than a preset angle, the larger the angle, the lower the speed will be.

[0029] In one illustrative embodiment, the control component further includes a liquid level detection component electrically connected to the control module;

[0030] The liquid level detection component is used to detect the liquid level height inside the sewage chamber;

[0031] The control module is also configured to adjust the speed of the vacuum fan only when the current liquid level reaches or exceeds the preset liquid level, based on the degree of tilting.

[0032] In one illustrative embodiment, the control component is configured to adjust the speed of the vacuum fan only when the current tilting degree reaches or exceeds a preset tilting degree.

[0033] This application also proposes a control method for a surface cleaning device, which includes...

[0034] Receive startup command;

[0035] Detect the current tilt level of the surface cleaning device's body;

[0036] The required rotational speed is obtained based on the current degree of tilting, and the vacuum fan of the surface cleaning device is driven to rotate at the required rotational speed, wherein the required rotational speed tends to decrease as the degree of tilting increases.

[0037] Since the speed of the vacuum fan tends to decrease as the machine tilts more, when using this surface cleaning device to clean the areas under beds and sofas, the speed of the vacuum fan is reduced due to the significant tilt of the machine. This decreases the flow of dirt into the wastewater chamber, resulting in smaller water splashes. At the same time, the airflow velocity from the wastewater chamber into the vacuum fan is also reduced, making it difficult for these water splashes to be carried out of the wastewater chamber by the airflow. Therefore, when the machine is laid flat at a large angle, the surface cleaning device reduces or even stops spraying water, improving the user experience. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the surface cleaning device under normal operating conditions in an embodiment of the present invention;

[0040] Figure 2This is a schematic diagram of the surface cleaning device in the case of the machine body lying flat at a large angle in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the internal structure of the surface cleaning device in an embodiment of the present invention;

[0042] Figure 4 This is a flowchart of a control method for a surface cleaning device according to an embodiment of the present invention;

[0043] Figure 5 This is a flowchart of a control method for a surface cleaning device according to an embodiment of the present invention.

[0044] Explanation of icon numbers:

[0045] 1. Surface cleaning device; 10. Water tank; 101. Wastewater chamber; 11. Body; 111. Housing; 113. Support rod; 114. Handle; 115. Suction pipe; 116. Vacuum fan; 12. Floor brush; 13. Control components; 131. Control module; 132. Liquid level detection component; 133. Angle detection component; 14. Waste pipe; 12. Floor brush; 121. Housing; 122. Roller brush.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0052] like Figure 1 , 2 The above, Figure 1 , 2 A surface cleaning device 1 is shown. The surface cleaning device 1 includes a body 11, a water tank 10, a floor brush 12, a waste pipe 14, a vacuum fan 116, and a control assembly 13. The floor brush 12 is mounted on the body 11 and is hinged to the body 11.

[0053] The floor brush 12 includes a housing 121, a roller brush 122, and a motor. Both the roller brush 122 and the motor are mounted on the housing 121. The roller brush 122 is approximately cylindrical. The upper part of the roller brush 122 is located inside the housing 121, and the lower part of the roller brush 122 extends out from the bottom of the housing 121. Both ends of the roller brush 122 are rotatably connected to the housing 121. The roller brush 122 can rotate around its own axis. The motor is driven by the roller brush 122 and can drive the roller brush 122 to rotate. The roller brush 122 is in contact with the ground, and when it rotates, it scrubs the floor.

[0054] The body 11 includes a handle 114, a support rod 113, a housing 111, and an air extraction pipe 115. The support rod 113 can be a straight rod. The support rod 113 includes a bottom end and a top end opposite to the bottom end. The handle 114 is mounted on the top end of the support rod 113, and the housing is mounted on the bottom end of the support rod 113. The handle 114 can be constructed as a ring structure. The bottom end of the support rod 113 is inserted into the housing 111 and is fixedly connected to the housing 111. The end of the housing 111 opposite to the handle 114 is hinged to the housing 121 of the floor brush 12, so that the body 11 is hinged to the floor brush 12.

[0055] A vacuum fan 116 is disposed inside the housing 111. The vacuum fan 116 includes an inlet and an outlet. The vacuum fan 116 draws in gas through the inlet and discharges it through the outlet. The inlet of the vacuum fan 116 is connected to one end of the suction pipe 115.

[0056] like Figure 3 As shown, the water tank 10 can be constructed in a generally cylindrical shape. The water tank 10 is connected to the housing 111 of the body 11, and the connection between the water tank 10 and the housing 111 can be detachable, such as by a snap-fit ​​connection. A sewage chamber 101 is provided inside the water tank 10, which is used to contain sewage. The sewage chamber 101 is provided with an exhaust port and a waste inlet. The exhaust port and waste inlet are located at the top of the waste chamber, that is, at the end of the waste chamber near the handle 114. One end of the exhaust port of the sewage chamber 101 is connected to the end of the suction pipe 115 away from the vacuum fan 116.

[0057] One end of the waste pipe 14 is connected to the waste inlet of the waste chamber 101, and the other end of the waste pipe 14 extends to the vicinity of the roller brush 122 of the floor brush 12.

[0058] like Figure 3 As shown, the control component 13 is electrically connected to the vacuum fan 116. The control component 13 is used to detect the degree of tilt of the machine body 11 and adjust the speed of the vacuum fan 116 according to the degree of tilt of the machine body 11. The speed of the vacuum fan 116 tends to decrease as the degree of tilt of the machine body 11 increases.

[0059] When the vacuum fan 116 is started, it draws air from the sewage chamber 101, creating a negative pressure inside. At this time, the waste pipe 14 can draw waste from the ground into the sewage chamber 101. This waste can be a mixture of solid, liquid, and gas. The waste undergoes gas-liquid separation within the sewage chamber 101, leaving the solid and liquid waste inside while the gas is drawn away by the vacuum fan 116.

[0060] The control component 13 is electrically connected to the vacuum fan 116. The control component 13 controls the rotation speed of the vacuum fan 116. The rotation speed of the vacuum fan 116 tends to decrease as the tilt of the machine body 11 increases. Thus, when using the surface cleaning device 1 to clean the areas under the bed and sofa, because the machine body 11 is tilted at a large angle, the rotation speed of the vacuum fan 116 is reduced, the flow of dirt entering the wastewater chamber 101 is reduced, resulting in smaller water splashes in the wastewater chamber 101. At the same time, the airflow velocity from the wastewater chamber 101 to the vacuum fan 116 is also reduced, making it difficult for these water splashes to be carried out of the wastewater chamber 101 by the airflow. Therefore, when the machine body 11 is lying flat at a large angle, the surface cleaning device 1 reduces or even stops spraying water, improving the user experience.

[0061] In some embodiments, the control component 13 may be a stepless speed switch. The stepless speed switch is located at the hinge between the body 11 and the floor brush 12. The main unit of the stepless speed switch may be mounted on the body 11, and the adjustment knob of the stepless speed switch is connected to the floor brush 12. The larger the angle between the body 11 and the floor brush 12, the greater the tilting degree of the body 11. The stepless speed switch adjusts the rotational speed of the vacuum fan 116 according to the angle between the body 11 and the floor brush 12. The stepless speed switch may be configured such that when the angle between the body 11 and the floor brush 12 is greater than a preset angle, the larger the angle between the body 11 and the floor brush 12, the lower the rotational speed of the vacuum fan 116. This preset angle may be 160°. The stepless speed switch may also be configured such that the larger the angle between the body 11 and the floor brush 12, the lower the rotational speed of the vacuum fan 116.

[0062] The speed of the vacuum fan 116 is adjusted by a stepless speed control switch, which is low in cost and simple in structure.

[0063] In some embodiments, the control component 13 includes a control module 131 and an angle detection component 133. The control module 131 is electrically connected to the angle detection component 133 and the vacuum fan 116. The angle detection component 133 is used to detect the tilting degree of the machine body 11 and send the tilting degree of the machine body 11 to the control module 131. The control module 131 is a logic control unit of the surface cleaning device 1. The control module 131 is used to drive the vacuum fan 116 and adjust the rotation speed of the vacuum fan 116 according to the tilting degree of the machine body 11. The rotation speed of the vacuum fan 116 tends to decrease as the tilting degree of the machine body 11 increases.

[0064] In some embodiments, the angle detection component 133 is a gyroscope, such as an electronic gyroscope. The gyroscope is mounted on the body 11 and can directly measure the tilt angle of the body 11, which is the angle between the body 11 and the horizontal plane. The smaller the tilt angle of the body 11, the greater the degree of tilting of the body 11.

[0065] In some embodiments, the angle detection component 133 is an angular displacement sensor, which can be a rheostat-type angular displacement sensor, an area-change capacitive angular displacement sensor, or a magnetoresistive angular displacement sensor. The angular displacement sensor is located at the hinge between the body 11 and the floor brush 12. This angular displacement sensor is used to measure the angle between the body 11 and the floor brush 12. When cleaning the floor using the surface cleaning device 1, the floor brush 12 is attached to the ground, and the angle between the floor brush 12 and the body 11 is an obtuse angle. The larger the angle between the body 11 and the floor brush 12, the greater the degree of tilting of the body 11.

[0066] In some embodiments, the angle detection component 133 includes a magnet and a Hall sensor. The magnet can emit a magnetic field. The magnet can be a permanent magnet or an electromagnet. The Hall sensor is used to measure the magnetic field strength at the location of the Hall sensor. The distance between the Hall sensor and the magnet is negatively correlated with the magnetic field strength. When the floor brush 12 rotates relative to the body 11, the distance between the magnet and the Hall sensor changes, and the magnetic field strength measured by the Hall sensor changes. The correspondence between the angle between the body 11 and the floor brush 12 and the magnetic field strength measured by the Hall sensor can be pre-calibrated. After the Hall sensor measures the current magnetic field strength, the control module 131 can obtain the angle corresponding to the current magnetic field strength based on the current magnetic field strength measured by the Hall sensor and the correspondence between the angle and the magnetic field strength. This angle is the current angle between the floor brush 12 and the body 11. When cleaning the floor using the surface cleaning device 1, the floor brush 12 is attached to the ground, and the angle between the floor brush 12 and the body 11 is an obtuse angle. The larger the angle between the body 11 and the floor brush 12, the greater the degree of tilting of the body 11.

[0067] In some embodiments, the angle detection component 133 is an encoder. The encoder is disposed at the hinge between the body 11 and the floor brush 12. The encoder's main body may be disposed on the body 11, and the encoder's shaft is connected to the floor brush 12. The encoder can measure the angle between the body 11 and the floor brush 12. When cleaning the floor using the surface cleaning device 1, the floor brush 12 is attached to the ground, and the angle between the floor brush 12 and the body 11 is an obtuse angle. The larger the angle between the body 11 and the floor brush 12, the greater the degree of tilting of the body 11.

[0068] In some embodiments, the control component 13 further includes a liquid level detection component 132. The liquid level detection component 132 is electrically connected to the control module 131. The liquid level detection component 132 is disposed on the water tank 10 and is used to detect the liquid level height in the sewage chamber 101 and send the liquid level height to the control module 131.

[0069] like Figure 4 As shown, this embodiment also proposes a control method for the surface cleaning device 1. This control method can be implemented by the control module 131 and includes the following steps:

[0070] Step S1: Control module 131 receives the start command and proceeds to step S2;

[0071] Users can send a start command to the control module 131 to start the surface cleaning device 1 via a switch located on the body 11.

[0072] Step S2: Detect the current tilt degree of the body 11 using the angle detection component 133, and proceed to step S3;

[0073] After receiving the user's start command, the control module 131 detects the current tilt degree of the body 11 through the angle detection component 133. The tilt degree of the body 11 can be characterized by the tilt angle of the body 11 or the angle between the body 11 and the floor brush 12.

[0074] The tilt angle is the angle between the body 11 and the horizontal plane. The smaller the tilt angle of the body 11, the greater the degree of tilting of the body 11. The bottom end of the body 11 is hinged to the rear end of the floor brush 12. During use, the angle between the body 11 and the floor brush 12 is usually an obtuse angle. The larger the angle between the body 11 and the floor brush 12, the greater the degree of tilting of the body 11.

[0075] Step S3: The control module 131 obtains the rotation speed to be executed corresponding to the current tilting degree, drives the vacuum fan 116 to rotate at the rotation speed to be executed, and proceeds to step S2.

[0076] There is a correlation between the tilting degree of the machine body 11 and the rotational speed of the vacuum fan 116. As the tilting degree of the machine body 11 increases, the rotational speed of the vacuum fan 116 tends to decrease. For example, the rotational speed of the vacuum fan 116 is negatively correlated with the tilting degree of the machine body 11; or, for example, the rotational speed of the vacuum fan 116 decreases in a stepped manner as the tilting degree of the machine body 11 increases. This correlation can be represented by a list of correlations between the tilting degree of the machine body 11 and the rotational speed of the vacuum fan 116. The control module 131 can retrieve the rotational speed to be executed corresponding to the current tilting degree from the correlation list.

[0077] When the degree of tilting is characterized by the angle between the body 11 and the horizontal plane, the corresponding relationship can be the relationship between the angle between the body 11 and the horizontal plane and the rotational speed of the vacuum fan 116. As the angle between the body 11 and the horizontal plane increases, the rotational speed of the vacuum fan 116 tends to decrease.

[0078] When the degree of tilting is characterized by the tilt angle of the body 11, the corresponding relationship can be the relationship between the tilt angle of the body 11 and the rotation speed of the vacuum fan 116. As the tilt angle of the body 11 decreases, the rotation speed of the vacuum fan 116 tends to decrease.

[0079] After obtaining the rotation speed to be executed corresponding to the current tilting degree, the control module 131 drives the vacuum fan 116 to rotate at the rotation speed to be executed.

[0080] The control module 131 controls the rotation speed of the vacuum fan 116. The rotation speed of the vacuum fan 116 tends to decrease as the tilt of the machine body 11 increases. Thus, when using the surface cleaning device 1 to clean the areas under the bed and sofa, the machine body 11 is tilted at a large angle, and the rotation speed of the vacuum fan 116 is reduced. This reduces the flow of dirt into the sewage chamber 101, resulting in smaller water splashes in the sewage chamber 101. At the same time, the airflow velocity from the sewage chamber 101 to the vacuum fan 116 is also reduced, making it difficult for these water splashes to be carried out of the sewage chamber 101 by the airflow. Therefore, when the machine body 11 is lying flat at a large angle, the probability of the surface cleaning device 1 spraying water is reduced, or even stopped, improving the user experience.

[0081] In some embodiments, the control module 131 includes a drive circuit electrically connected to the vacuum fan 116. The drive circuit can send a pulse signal to the vacuum fan 116 to drive the vacuum fan 116 to rotate. The pulse signal can be a PWM pulse signal.

[0082] In step S3, the control module 131 controls the speed of the vacuum fan 116 by adjusting the duty cycle of the pulse signal. The duty cycle of the pulse signal is positively correlated with the speed of the vacuum fan 116.

[0083] The larger the duty cycle of the pulse signal, the greater the power and the higher the speed of the vacuum blower 116. When driving the vacuum blower 116 at the speed to be executed, it is only necessary to adjust the pulse signal to the duty cycle corresponding to the speed to be executed, and then send the pulse signal to the vacuum blower 116 so that the vacuum blower 116 can run at the speed to be executed.

[0084] In some embodiments, such as Figure 5 As shown, step S2 includes steps S21 to S23.

[0085] Step S21: Detect the current tilting degree of the machine body 11 through the angle detection component 133, and detect the current liquid level height in the sewage chamber 101 through the liquid level detection component 132, and proceed to step S22;

[0086] Step S22: Control module 131 determines whether the current tilting degree has reached or exceeded the preset tilting degree and whether the current liquid level has reached or exceeded the preset liquid level. If so, proceed to step S3; otherwise, proceed to step S23.

[0087] Step S23: The control module 131 drives the vacuum fan 116 to rotate at a preset speed. The speed to be executed in step S3 is less than the preset speed, and then proceeds to step S21.

[0088] When the tilt angle of the body 11 is less than or equal to the preset tilt angle or the current liquid level is less than or equal to the preset liquid level, water droplets in the sewage chamber 101 are less likely to splash out of the sewage chamber 101 and be ejected from the outlet of the vacuum fan 116. At this time, the speed of the vacuum fan 116 does not need to be adjusted according to the tilt angle, but is driven by a larger preset speed, resulting in high cleaning efficiency of the surface cleaning device 1. However, when the tilt angle of the body 11 reaches or exceeds the preset tilt angle and the current liquid level reaches or exceeds the preset liquid level, sewage in the sewage chamber 101 is more likely to be ejected from the outlet of the vacuum fan 116. At this time, step S3 is entered to reduce the speed of the vacuum fan 116.

[0089] In this embodiment, the angle between the body 11 and the floor brush 12 can vary between 100° and 180°. The preset tilt can be set to the tilt when the angle between the body 11 and the floor brush 12 is 160°. The preset liquid level height can be 25% of the maximum liquid level height of the sewage chamber 101.

[0090] When the angle between the body 11 and the floor brush 12 is less than 160° or the water level in the sewage chamber 101 is less than 25% of the maximum liquid level, the vacuum fan 116 rotates at a preset speed. When the angle between the body 11 and the floor brush 12 is greater than or equal to 160° or the water level in the sewage chamber 101 is greater than or equal to 25% of the maximum liquid level, step S3 is entered to appropriately reduce the speed of the vacuum fan 116.

[0091] In some embodiments, step S2 includes steps S21a to S23a.

[0092] Step S21a: Detect the current tilt degree of the body 11 by the angle detection component 133, and proceed to step S22a;

[0093] Step S22a: Determine whether the current tilting degree has reached or exceeded the preset tilting degree. If so, proceed to step S3; otherwise, proceed to step S23a.

[0094] Step S23a: The control module 131 drives the vacuum fan 116 to rotate at a preset speed. The speed to be executed in step S3 is less than the preset speed. Then proceed to step S21a.

[0095] When the tilt of the body 11 is less than the preset tilt level, water droplets in the sewage chamber 101 are less likely to splash out of the sewage chamber 101 and be ejected from the outlet of the vacuum fan 116. At this time, the speed of the vacuum fan 116 does not need to be adjusted according to the tilt level, but is driven by a larger preset speed, resulting in high cleaning efficiency of the surface cleaning device 1. However, when the tilt of the body 11 reaches or exceeds the preset tilt level, sewage in the sewage chamber 101 is more likely to be ejected from the outlet of the vacuum fan 116. At this time, step S3 is entered to reduce the speed of the vacuum fan 116.

[0096] In this embodiment, the angle between the body 11 and the floor brush 12 can vary between 100° and 180°. The preset tilt degree can be set to the tilt degree when the angle between the body 11 and the floor brush 12 is 160°.

[0097] When the angle between the body 11 and the floor brush 12 is less than 160°, the vacuum fan 116 rotates at a preset speed. When the angle between the body 11 and the floor brush 12 is greater than or equal to 160°, step S3 is entered to appropriately reduce the speed of the vacuum fan 116.

[0098] In some embodiments, step S2 includes steps S21b to S23b.

[0099] Step S21b: Detect the current tilting degree of the machine body 11 by the angle detection component 133, and detect the current liquid level height in the sewage chamber 101 by the liquid level detection component 132; otherwise, proceed to step S23.

[0100] Step S22b: Determine whether the current liquid level has reached or exceeded the preset liquid level. If yes, proceed to step S3; otherwise, proceed to step S23b.

[0101] Step S23b: The control module 131 drives the vacuum fan 116 to rotate at a preset speed. The speed to be executed in step S3 is less than the preset speed. Then proceed to step S21b.

[0102] When the current liquid level is below the preset level, water droplets in the sewage chamber 101 are less likely to splash out and be ejected from the outlet of the vacuum fan 116. In this case, the speed of the vacuum fan 116 does not need to be adjusted according to the tilt angle; instead, it is driven at a larger preset speed, resulting in high cleaning efficiency of the surface cleaning device 1. However, when the current liquid level reaches above the preset level, sewage in the sewage chamber 101 is more likely to be ejected from the outlet of the vacuum fan 116. At this point, step S3 is initiated to reduce the speed of the vacuum fan 116.

[0103] In this embodiment, the preset liquid level height can be 25% of the maximum liquid level height of the sewage chamber 101. When the water level in the sewage chamber 101 is less than 25% of the maximum liquid level height, the vacuum fan 116 rotates at a preset speed. When the water level in the sewage chamber 101 is greater than or equal to 25% of the maximum liquid level height, step S3 is entered to appropriately reduce the speed of the vacuum fan 116.

[0104] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A surface cleaning device, characterized in that, include: The water tank is equipped with a sewage chamber; The machine body includes a vacuum fan connected to the sewage chamber; as well as A control component, electrically connected to the vacuum blower, is configured to detect the degree of tilt of the machine body and adjust the speed of the vacuum blower according to the degree of tilt, wherein the speed tends to decrease as the degree of tilt increases; The control component includes: An angle detection component is used to detect the degree of tilting; as well as A control module, electrically connected to the angle detection component and the vacuum fan, is configured to adjust the speed of the vacuum fan according to the degree of tilting; The control component also includes a liquid level detection component electrically connected to the control module; The liquid level detection component is used to detect the liquid level height inside the sewage chamber; The control module is also configured to adjust the speed of the vacuum fan only when the current liquid level reaches or exceeds the preset liquid level, based on the degree of tilting.

2. The surface cleaning device according to claim 1, characterized in that, The angle detection component is a gyroscope, which is used to measure the tilt angle of the fuselage; The smaller the tilt angle, the greater the degree of tilting of the fuselage.

3. The surface cleaning device according to claim 1, characterized in that, The surface cleaning device also includes a floor brush, hinged to one end of the body; The angle detection component is an angular displacement sensor or an encoder; The angle detection component is used to measure the angle between the machine body and the floor brush. The larger the angle, the greater the degree of tilting of the machine body.

4. The surface cleaning device according to claim 3, characterized in that, The angular displacement sensor is a variable resistor type angular displacement sensor, an area-changing capacitive angular displacement sensor, or a magnetoresistive angular displacement sensor.

5. The surface cleaning device according to claim 1, characterized in that, The surface cleaning device also includes a floor brush, hinged to one end of the body; The angle detection component includes a magnet disposed on the ground brush and a Hall sensor disposed on the body of the machine. The Hall sensor is used to measure the magnetic field strength of the magnet; The angle between the machine body and the floor brush corresponds to the magnetic field strength; the larger the angle, the greater the degree of tilting of the machine body.

6. The surface cleaning device according to claim 1, characterized in that, The control module is also configured to adjust the speed of the vacuum fan only when the current tilting degree reaches or exceeds a preset tilting degree and the current liquid level reaches or exceeds a preset liquid level.

7. The surface cleaning device according to claim 1, characterized in that, The surface cleaning device also includes a floor brush, hinged to one end of the body; The control component is a stepless speed control switch; The main unit of the stepless speed control switch is connected to the machine body, and the adjustment knob of the stepless speed control switch is connected to the floor brush; The stepless speed control switch is configured such that when the angle between the machine body and the floor brush is greater than a preset angle, the larger the angle, the lower the speed will be.

8. A control method for the surface cleaning device according to claim 1, characterized in that, include: Receive startup command; Detect the current tilt level of the surface cleaning device's body; When the current liquid level reaches or exceeds the preset liquid level, the speed of the vacuum fan is adjusted according to the degree of tilting. The required rotational speed is obtained based on the current degree of tilting, and the vacuum fan of the surface cleaning device is driven to rotate at the required rotational speed, wherein the required rotational speed tends to decrease as the degree of tilting increases.

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