A cleaning system and liquid level detection method

Abstract

The application discloses a cleaning system and a liquid level detection method, and relates to the technical field of cleaning equipment. The cleaning system comprises a cleaning robot with a cleaning water tank, a liquid inlet and a liquid outlet, and a cleaning base station with a liquid injection connector, a backflow connector and a liquid injection device. The liquid injection device comprises a base station water tank and a mainboard. The base station water tank is communicated with the liquid injection connector through a liquid conveying element and communicated with the backflow connector through an air pump. The mainboard is electrically connected with the liquid conveying element and the air pump respectively, used for detecting the current working current value of the air pump and determining whether the air pump is in a water pumping state according to the working current value. Compared with the existing liquid level detection method, the cleaning system provided by the application is used for detecting the working current value of the air pump to determine whether the air pump is in the water pumping state, so as to determine whether the liquid in the cleaning water tank is full, and can stop continuing to inject liquid into the cleaning water tank when the liquid in the cleaning water tank is just full, so that the detection precision and reliability are higher.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to a cleaning system and a liquid level detection method. Background Technology

[0002] In the prior art, the cleaning base station injects liquid into the water tank of the cleaning robot through the liquid injection connector and recovers the air or liquid from the water tank of the cleaning robot through the return connector. The water tank of the cleaning robot is equipped with a liquid level sensor to facilitate stopping the injection of liquid into the water tank when it is full.

[0003] However, this liquid level detection method has low accuracy and is prone to problems such as excessive liquid in the tank leading to leakage, and stopping liquid filling before the base station is fully filled, which reduces the user experience. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a cleaning system and a liquid level detection method, which aims to solve the technical problem that the liquid level detection accuracy of the water tank of the cleaning robot in the prior art is low, which reduces the user experience.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a cleaning system, including:

[0007] A cleaning robot has a cleaning water tank and an inlet and an outlet respectively connected to the cleaning water tank;

[0008] A clean base station has a liquid injection connector, a return connector, and a liquid injection device. The liquid injection connector can be connected to the liquid inlet, and the return connector can be connected to the liquid outlet.

[0009] The liquid injection device includes a base station water tank and a main board. The base station water tank is connected to the liquid injection connector through a liquid delivery component and to the return connector through an air pump. The main board is electrically connected to the liquid delivery component and the air pump respectively, and is used to detect the current operating current value of the air pump and determine whether the air pump is in the pumping state based on the operating current value.

[0010] When the air pump is in the pumping state, the main board controls the liquid delivery component and the air pump to shut down, so that the liquid injection device stops injecting liquid into the cleaning water tank.

[0011] In one embodiment of the first aspect, the liquid injection connector includes a liquid injection suction cup and a resiliently arranged sliding member. The liquid injection suction cup is in communication with the liquid delivery member, the liquid injection suction cup is fixed on the sliding member, and can be adsorbed at the liquid inlet.

[0012] In one embodiment of the first aspect, the slider includes a sliding body and an elastic element, the liquid injection suction cup is fixed to one side of the sliding body, and the elastic element is disposed on the side of the sliding body opposite to the liquid injection suction cup, so that the liquid injection suction cup can elastically fit against the edge of the liquid inlet.

[0013] In one embodiment of the first aspect, the injection connector further includes a plurality of protrusions arranged in a ring on the inner ring wall of the injection suction cup and capable of abutting against the edge of the inlet.

[0014] In one embodiment of the first aspect, the injection device further includes a two-position three-way solenoid valve with a pressure relief port, the two-position three-way solenoid valve being connected between the liquid delivery component and the injection connector and electrically connected to the main board, the main board controlling the pressure relief port of the two-position three-way solenoid valve to open when the injection device stops injecting liquid into the cleaning water tank.

[0015] In one embodiment of the first aspect, a one-way valve is provided at the liquid inlet, and the liquid inlet is connected to the cleaning water tank through the one-way valve, so that liquid can flow into the cleaning water tank from the liquid injection connector, and the liquid in the cleaning water tank is restricted from flowing out from the liquid inlet; and / or

[0016] A one-way valve is provided at the liquid outlet, and the liquid outlet is connected to the cleaning water tank through the one-way valve so that liquid can flow from the cleaning water tank into the return connector, and the liquid in the return connector is restricted from flowing into the cleaning water tank.

[0017] In one embodiment of the first aspect, the one-way valve includes a valve body and a valve disc, the valve body having a liquid passage communicating with the cleaning water tank, and the valve disc blocking the liquid passage to allow the liquid passage to be unidirectionally open.

[0018] Secondly, this application also provides a liquid level detection method, applied to the cleaning system described in any of the above embodiments, the liquid level detection method comprising:

[0019] Obtain the current operating current value of the air pump;

[0020] Determine whether the air pump is in pumping mode based on the operating current value;

[0021] If the air pump is in the pumping state, then the cleaning water tank is determined to be full of liquid.

[0022] In one embodiment of the second aspect, determining whether the air pump is in a pumping state based on the operating current value includes:

[0023] Determine whether the operating current value is greater than a preset current threshold;

[0024] If so, the air pump is determined to be in the water pumping state;

[0025] If not, then the air pump is determined to be in the pumping state.

[0026] In one embodiment of the second aspect, before obtaining the current operating current value of the air pump, the liquid level detection method further includes:

[0027] It is determined that the charging electrode of the cleaning base station and the electrical connection part of the cleaning robot are in an electrically connected state.

[0028] Compared to existing technologies, the beneficial effects of this application are:

[0029] This application provides a cleaning system, including: a cleaning robot with a cleaning water tank, an inlet, and an outlet; and a cleaning base station with an injection connector, a return connector, and an injection device. The injection connector is connected to the inlet, the return connector is connected to the outlet, and the injection device includes the base station water tank and a main board. The base station water tank is connected to the injection connector via a liquid delivery component and to the return connector via an air pump. The main board is electrically connected to both the liquid delivery component and the air pump, and is used to detect the current operating current value of the air pump and determine whether the air pump is in a pumping state based on the operating current value.

[0030] Because the air pump operates at different currents when pumping air and water (the current is higher when pumping water), the mainboard of the cleaning base station is electrically connected to the air pump. The mainboard detects the air pump's current to determine if it is in pumping mode, thus determining whether the cleaning water tank is full. When the air pump is in pumping mode, meaning the cleaning water tank is just full, the mainboard controls the liquid delivery components and the air pump to shut down, stopping further filling of the cleaning water tank.

[0031] Compared to existing liquid level detection methods, the cleaning system provided in this application can stop adding liquid to the cleaning tank when the liquid in the cleaning tank is just full, thus achieving higher detection accuracy and reliability. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This application shows a schematic diagram of the cleaning system from one perspective in some embodiments;

[0034] Figure 2 A schematic diagram of the structure of a clean base station from one perspective is shown in some embodiments of this application;

[0035] Figure 3 This application shows a schematic diagram of a portion of the internal structure of a clean base station in some embodiments;

[0036] Figure 4 This application shows partial structural schematic diagrams of the cleaning robot in some embodiments;

[0037] Figure 5 This application shows a schematic diagram of the cleaning robot from one perspective in some embodiments;

[0038] Figure 6 It shows Figure 5 A cross-sectional view of the cleaning robot at position AA.

[0039] Figure 7 This paper shows a schematic diagram of the one-way valve from one perspective in some embodiments of this application;

[0040] Figure 8 Exploded views of the one-way valve structure in some embodiments of this application are shown;

[0041] Figure 9 This paper shows a schematic diagram of the liquid injection connector from one perspective in some embodiments of this application;

[0042] Figure 10 A first flowchart of a liquid level detection method in some embodiments of this application is shown;

[0043] Figure 11 A second flowchart of a liquid level detection method in some embodiments of this application is shown.

[0044] Explanation of key component symbols:

[0045] 100-Clean base station; 110-Injection connector; 111-Injection suction cup; 1111-Inner ring wall; 112-Sliding component; 1121-Sliding body; 1122-Elastic element; 113-Protrusion; 120-Return connector; 130-Injection device; 131-Base station water tank; 132-Main board; 133-Air pump; 134-Solenoid valve; 135-Memory; 140-Open mouth; 141-Opening; 142-Charging electrode; 150-Guide wheel; 160-Sewage tank; 170-Dust collection bin; 18 0-Vacuum suction connector; 190-Wastewater recycling connector; 200-Cleaning robot; 210-Cleaning water tank; 211-Water inlet; 212-Water outlet; 213-Top cover; 220-Liquid inlet; 230-Liquid outlet; 240-One-way valve; 241-Valve body; 2411-Liquid channel; 2412-Extension; 2413-Connection hole; 242-Valve disc; 250-First water pipe; 260-Second water pipe; 270-Wastewater outlet; 280-Dust box outlet; 290-Electrical connection; 300-Surface to be cleaned. Detailed Implementation

[0046] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] Before describing this embodiment, the concepts involved will be introduced first:

[0052] A water pump is a machine that transports or pressurizes liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals.

[0053] Air pump: A device used to remove air from or add air to a closed space. The following shows the parameter values ​​for a certain model of air pump.

[0054] Rated voltage DC12.0V, withstand voltage 13V Operating voltage DC 11.0V~13.0V Pumping current 380±80mA Water flow 700±10% mL / min Water pressure >20Psi Pumping current <150mA

[0055] Cleaning robots and cleaning base stations are usually used together. The cleaning base station can fill the cleaning robot's water tank and recycle the sewage and garbage collected by the cleaning robot.

[0056] The existing cleaning base station injects liquid into the water tank of the cleaning robot through the injection connector and recovers the air or liquid from the water tank through the return connector. The water tank of the cleaning robot is equipped with a liquid level sensor to stop injecting liquid into the tank when it is full.

[0057] This liquid level detection method has low accuracy and is prone to problems such as excessive liquid in the tank leading to leakage, and stopping liquid filling before the tank is fully filled for cleaning the base station, which reduces the user experience.

[0058] In addition, the injection and return connectors are usually connected to the cleaning robot by adsorption. When the injection is completed, the edge of the cleaning robot's inlet is too firmly attached to the injection and return connectors of the cleaning base station, making it difficult to separate and affecting the user experience.

[0059] like Figure 1 As shown, in order to solve the above-mentioned technical problems, in a first aspect, the embodiments of this application provide a cleaning system, which relates to the field of cleaning equipment technology, and is mainly used for cleaning a surface 300 to be cleaned, such as tiles, carpets, tabletops, etc.

[0060] like Figures 2 to 4 As shown, the cleaning system mainly includes: a cleaning robot 200 with a cleaning water tank 210, an inlet 220 and an outlet 230, and a cleaning base station 100 with an injection connector 110, a return connector 120 and an injection device 130.

[0061] The liquid inlet 220 and liquid outlet 230 are connected to the cleaning water tank 210, the liquid injection connector 110 is connected to the liquid inlet 220, and the return connector 120 is connected to the liquid outlet 230. The liquid injection device 130 includes a base station water tank 131 and a main board 132. The base station water tank 131 is connected to the liquid injection connector 110 through a liquid delivery component and to the return connector 120 through an air pump 133. The main board 132 is electrically connected to both the liquid delivery component and the air pump 133, and is used to detect the current operating current value of the air pump 133 and determine whether the air pump 133 is in the pumping state based on the operating current value.

[0062] When the air pump 133 is in the pumping state, the main board 132 controls the liquid delivery component and the air pump 133 to shut down, so that the liquid injection device 130 stops injecting liquid into the cleaning water tank.

[0063] It should be noted that, taking the air pump example in the table above as an example, when the cleaning water tank 210 is not full of liquid, the air pump 133 is in the air pumping state, and the air pumping current is less than 150mA. When the cleaning water tank 210 is full of liquid, the air pump 133 is in the water pumping state, and the water pumping current is 380±80mA.

[0064] It is easy to understand that the working current value of air pump 133 is different when pumping air and when pumping water, and the working current value when pumping water is greater than the working current value when pumping air.

[0065] It is understood that in the cleaning system provided in this embodiment, since the working current value of the air pump 133 is different when pumping air and pumping water, and the working current value when pumping water is greater than the working current value when pumping air, the main board 132 of the cleaning base station is electrically connected to the air pump 133. The main board 132 is used to detect the working current value of the air pump 133 to determine whether the air pump 133 is in the water pumping state, thereby determining whether the liquid in the cleaning water tank 210 is full.

[0066] When the air pump 133 is in the pumping state, that is, when the liquid in the cleaning water tank 210 is just full, the main board 132 controls the liquid delivery component and the air pump 133 to shut down, so as to stop the liquid from continuing to be injected into the cleaning water tank 210.

[0067] Therefore, compared with existing liquid level detection methods, the cleaning system provided in this application can stop adding liquid to the cleaning tank 210 when the liquid in the cleaning tank 210 is just full, thus achieving higher detection accuracy and reliability.

[0068] In this embodiment, the motherboard 132 may include a controller and a current detection sensor. The current detection sensor is electrically connected to the air pump 133, and the controller is electrically connected to the current detection sensor, the air pump 133 and the liquid delivery component, respectively, so as to perform functions such as detection, judgment and control during the liquid filling process of the cleaning water tank 210, so as to improve the structural compactness and intelligence of the cleaning base station.

[0069] In addition, the liquid injection connector 110 is used to inject liquid into the cleaning water tank 210 through the liquid inlet 220, and the return connector 120 is used to allow the air or liquid in the cleaning water tank 210 to flow back to the base station water tank 131 through the liquid outlet 230, so as to ensure that the liquid injection process can be carried out smoothly.

[0070] For example, the liquid delivery component can be a water pump, peristaltic pump, or other component with liquid delivery function. The liquid injected into the cleaning water tank 210 through the liquid delivery component can be clean water or cleaning fluid, such as a mixed solution composed of cleaning agent and clean water.

[0071] like Figure 2 As shown, in one embodiment, in order to improve the cleaning effect on the surface to be cleaned 300, the base station water tank 131 is used to store clean water, and the liquid injection device 130 also includes a storage device 135 for storing cleaning agent. The storage device 135 is connected to the liquid injection connector 110 through a peristaltic pump, so that the cleaning agent and clean water are mixed to form a mixed solution, which is then injected into the cleaning water tank 210 through the liquid injection connector 110 to enhance the cleaning effect of the cleaning robot 200 on the surface to be cleaned 300.

[0072] To facilitate the setting of the inlet 220 and outlet 230, the cleaning robot 200 includes a body and a casing. The body is arranged around the casing, the cleaning water tank 210 is set in the casing, and both the inlet 220 and outlet 230 are located on the casing.

[0073] To facilitate the assembly of the liquid injection connector 110, the return connector 120, and the liquid injection device 130, the cleaning base station 100 includes a base station body and a base. The base is located on the side of the base station body near the surface to be cleaned 300 and is used to dock the cleaning robot 200. The liquid injection connector 110, the return connector 120, and the liquid injection device 130 are all located within the base station body.

[0074] like Figure 2 As shown, optionally, the base station body is connected to the base to define an open cavity 140. The injection connector 110 and the return connector 120 are both disposed on the cavity wall of the open cavity 140 away from its opening 141. The cleaning robot 200 can be accommodated at least partially in the open cavity 140. Guide wheels 150 are disposed on the two opposite cavity walls of the open cavity 140.

[0075] When the cleaning robot 200 enters the opening 141, the wheel surface of the guide wheel 150 can abut against the body of the cleaning robot 200 to guide the cleaning robot 200 into the opening 140, thereby improving the smoothness of docking between the cleaning robot and the cleaning base station and increasing the docking efficiency between the cleaning robot 200 and the liquid injection connector 110 and return connector 120 of the cleaning base station 100.

[0076] like Figure 9 As shown, in one embodiment, in order to reduce the hard collision phenomenon when the cleaning robot 200 docks with the cleaning base station 100, the liquid injection connector 110 includes a liquid injection suction cup 111 and an elastically configured sliding member 112. The liquid injection suction cup 111 is connected to the liquid delivery member, the liquid injection suction cup 111 is fixed on the sliding member 112, and can be adsorbed at the liquid inlet 220.

[0077] It is understandable that by configuring the elastically set sliding member 112, the liquid injection suction cup 111 can elastically fit with the edge of the liquid inlet 220, so as to achieve the effect of buffering and shock absorption when the liquid injection suction cup 111 docks with the liquid inlet 220, thereby improving the rigid contact between the liquid injection suction cup 111 and the edge of the liquid inlet 220 and extending the service life of the liquid injection device 130.

[0078] like Figure 9 As shown, the sliding member 112 further includes a sliding body 1121 and an elastic element 1122. The liquid injection suction cup 111 is fixed to one side of the sliding body 1121, and the elastic element 1122 is disposed on the side of the sliding body 1121 away from the liquid injection suction cup 111, so that the liquid injection suction cup 111 can elastically fit with the edge of the liquid inlet 220.

[0079] In this embodiment, the elastic element 1122 provides elastic restoring force to the sliding body 1121 when the injection suction cup 111 docks with the inlet 220, so that the injection suction cup 111 and the edge of the inlet 220 fit elastically, which has the effect of shock absorption and buffering, and improves the rigid contact phenomenon between the injection suction cup 111 and the edge of the inlet 220.

[0080] For example, the elastic element 1122 can be a cylindrical spring. The base station body of the cleaning base station 100 is provided with a groove, the sliding body 1121 is slidably disposed in the groove, and the cylindrical spring is connected to the sliding body 1121 and the groove wall.

[0081] Of course, the elastic element 1122 can also be a spring sheet, which can also achieve the buffering effect.

[0082] In another embodiment, the injection connector 110 can also be a connecting pipe, which is used to plug into the inlet 220, and can also realize the docking of the cleaning base station 100 and the cleaning robot 200.

[0083] like Figure 9 As shown, in a specific embodiment, in order to further improve the smoothness of the injection process, the injection connector 110 also includes a plurality of protrusions 113, such as three, four, six, eight, ten, etc. The plurality of protrusions 113 are distributed in a ring on the inner ring wall 1111 of the injection suction cup 111 and can abut against the edge of the inlet 220.

[0084] When the injection suction cup 111 contacts the edge of the inlet 220, the protrusion 113 first abuts against the edge of the inlet 220, which can reduce the contact area between the inner ring wall 1111 of the injection suction cup 111 and the body of the cleaning robot 200, and improve the phenomenon of excessive adsorption between the injection suction cup 111 and the edge of the inlet 220. In this way, when the injection is finished, the injection suction cup 111 can easily separate from the inlet 220.

[0085] For example, the protrusion 113 may be a spherical protrusion that can make point contact with the edge of the liquid inlet 220 to reduce the contact area between the inner ring wall 1111 of the liquid injection suction cup 111 and the body of the cleaning robot 200, thereby further improving the phenomenon of excessive adsorption between the liquid injection suction cup 111 and the edge of the liquid inlet 220.

[0086] It should be noted that the structure of the reflux connector 120 can also be set with reference to the structure of the injection connector 110 in the above example, and achieve the same beneficial effect as the injection connector 110. For example, the reflux connector 120 includes a reflux suction cup and a sliding member 112. The sliding member 112 includes a sliding body 1121 and an elastic element 1122, which will not be listed here.

[0087] like Figure 3 As shown, in one embodiment, in order to more precisely control the liquid injection process of the cleaning water tank 210, the liquid injection device 130 further includes a solenoid valve 134, which is connected between the liquid delivery component and the liquid injection connector 110 and electrically connected to the main board 132.

[0088] It should be noted that the solenoid valve 134 is an electromagnetically controlled industrial device, a fundamental component of automation used to control fluids, and belongs to the actuator category, not limited to hydraulic or pneumatic systems. The solenoid valve 134 can be used with different circuits to achieve the desired control, while ensuring both control precision and flexibility.

[0089] In this embodiment, by setting a solenoid valve 134 connected between the liquid delivery component and the injection connector 110, the direction, flow rate, speed and other parameters of the liquid can be precisely controlled, thereby improving the injection efficiency.

[0090] Meanwhile, since the parameters of the liquid can be controlled during the injection process, the detection accuracy and reliability of the liquid level detection sensor are indirectly improved.

[0091] Furthermore, in order to improve the smoothness of the injection process, the solenoid valve 134 is selected as a two-position three-way solenoid valve with a pressure relief port. When the injection device 130 stops injecting liquid into the cleaning water tank 210, the main board 132 controls the pressure relief port of the two-position three-way solenoid valve to open.

[0092] Understandably, by setting a two-position three-way solenoid valve with a pressure relief port, when the cleaning base station 100 stops injecting liquid into the cleaning robot 200, the main board 132 can control the pressure relief port of the two-position three-way solenoid valve to release pressure, so as to gradually reduce the adsorption force between the liquid injection connector 110 and the return connector 120 and the cleaning robot 200, making it easier for the cleaning robot 200 to separate from the liquid injection connector 110 and the return connector 120, thereby improving the smoothness of the liquid injection process.

[0093] like Figures 5 to 7 As shown, in one embodiment, in order to improve the one-way sealing effect of the liquid inlet 220, a one-way valve 240 is provided at the liquid inlet 220. The liquid inlet 220 is connected to the cleaning water tank 210 through the one-way valve 240, so that the liquid can flow into the cleaning water tank 210 from the liquid injection connector 110 and restrict the liquid in the cleaning water tank 210 from flowing out of the liquid inlet 220.

[0094] Understandably, by setting a one-way valve 240 at the liquid inlet 220 of the cleaning robot 200, the one-way valve 240 is used to restrict the liquid in the cleaning water tank 210 from flowing out of the liquid inlet 220, thereby enhancing the one-way sealing capability of the liquid inlet 220 and effectively improving the phenomenon of liquid and gas leakage.

[0095] Of course, in order to improve the one-way sealing effect of the liquid outlet 230 in the above embodiment, a one-way valve 240 can also be provided at the liquid outlet 230. The liquid outlet 230 is connected to the cleaning water tank 210 through the one-way valve 240, so that the liquid can flow from the cleaning water tank 210 into the return connector 120 and restrict the liquid in the return connector 120 from flowing into the cleaning water tank 210, thereby enhancing the one-way sealing capability of the liquid outlet 230 and further improving the phenomenon of liquid and gas leakage.

[0096] like Figure 8 As shown, in a specific embodiment, the one-way valve 240 includes a valve body 241 and a valve disc 242. The valve body 241 has a liquid passage 2411 communicating with the cleaning water tank 210. The valve disc 242 is sealed in the liquid passage 2411 to allow the liquid passage 2411 to be unidirectionally open.

[0097] It should be noted that the one-way valve 240 located on the side of the inlet 220 has its valve disc 242's conducting side facing the cleaning water tank 210, while the one-way valve 240 located on the side of the outlet 230 has its valve disc 242's conducting side facing away from the cleaning water tank 210.

[0098] It is understandable that, since valve disc 242 has a one-way conduction property, by sealing valve disc 242 in the liquid channel 2411, a one-way sealing effect can be achieved, thereby improving the phenomenon of liquid and gas leakage in the cleaning water tank 210.

[0099] Furthermore, an extension 2412 may be provided on the valve body 241, and a connecting hole 2413 is provided on the extension 2412. The connecting hole 2413 facilitates the insertion of a spiral fastener so that the one-way valve can be assembled at the liquid inlet 220.

[0100] like Figure 4 and Figure 6 As shown, in one embodiment, the cleaning water tank 210 has a top cover 213 on the side opposite to the surface to be cleaned 300. The top cover 213 is provided with a water inlet 211 and a water outlet 212. The liquid inlet 220 is connected to the water inlet 211 through a first water pipe 250, and the liquid outlet 230 is connected to the water outlet 212 through a second water pipe 260.

[0101] It should be noted that the cleaning water tank 210 has a top cover 213 on the side away from the surface to be cleaned 300. That is, the top cover 213 is located at the high point of the water level in the cleaning water tank 210. The top cover 213 is provided with a water inlet 211 and a water outlet 212, that is, both the water inlet 211 and the water outlet 212 are located at the high point of the water level in the cleaning water tank 210.

[0102] Understandably, by placing the water inlet 211 at a high point in the water level of the cleaning water tank 210, the injection speed can be increased, thereby reducing the power requirements of the liquid delivery components and thus reducing the energy consumption of the cleaning system.

[0103] On the other hand, by setting the water outlet 212 at the high point of the water level in the cleaning water tank 210, the liquid in the cleaning water tank 210 will only be at the high point of the water level when the cleaning water tank 210 is full. This design is to prevent the cleaning system from falsely reporting that the water is full when the liquid is not full.

[0104] In addition, the first water pipe 250 is provided to guide the liquid at the inlet 220 into the inlet hole 211. The second water pipe 260 is provided to guide the liquid at the outlet hole 212 into the return connector 120 through the outlet 230.

[0105] like Figure 2 and Figure 4 As shown, in one embodiment, the liquid injection device further includes a charging electrode 142 electrically connected to the motherboard 132. The cleaning robot 200 has an electrical connection part 290 electrically connected to its power module. The charging electrode 142 can be electrically connected to the electrical connection part 290 to enable the cleaning base station 100 to charge the cleaning robot 200.

[0106] In addition, the motherboard 132 is also used to detect whether the charging electrode 142 is electrically connected to the electrical connection part 290. When the charging electrode 142 is electrically connected to the electrical connection part 290, the motherboard 132 starts to detect the current operating current value of the air pump 133 in real time.

[0107] In this way, the motherboard 132 does not need to detect the working status of the air pump 133 in real time. It only detects the current value of the air pump 133 after the electrical connection part 290 contacts the charging electrode 142, thereby reducing the power consumption of the cleaning base station 100.

[0108] like Figure 2 and Figure 4 As shown, in one embodiment, in order to facilitate the recycling of garbage in the dust box of the cleaning robot 200 and the recycling of sewage in the sewage collection tank of the cleaning robot 200, the cleaning base station 100 also has a sewage tank 160, a dust collection bin 170 (the structure of the dust collection bin is not shown in the figure), a dust suction connector 180 and a sewage recycling connector 190.

[0109] The vacuum cleaner connector 180 is used to connect with the dust box outlet 280 of the cleaning robot 200 to collect the garbage in the dust box into the dust collection bin 170. The wastewater recycling connector 190 is connected with the wastewater outlet 270 of the cleaning robot 200 to collect the wastewater in the wastewater collection box into the wastewater tank 160 of the cleaning base station 100.

[0110] like Figure 10 As shown, in a second aspect, embodiments of this application also provide a liquid level detection method for a cleaning system, the liquid level detection method including steps S410 to S430.

[0111] S410, obtain the current operating current value of air pump 133.

[0112] Understandably, a current detection sensor can be set on the motherboard 132 as an acquisition module. The current detection sensor is electrically connected to the air pump 133 and is used to detect the current operating current value of the air pump 133.

[0113] S420, determine whether the air pump 133 is in the pumping state based on the operating current value.

[0114] Understandably, the motherboard 132 can determine whether the air pump 133 is in pumping mode based on the operating current value obtained from the current detection sensor. For example... Figure 11 As shown, the process includes sub-steps S421 to S423.

[0115] S421, determine whether the operating current value is greater than the preset current threshold.

[0116] For example, the preset current threshold can be set to 320mA, 330.5mA, 350mA, 379mA, 379.8mA, 379.91mA, 380mA, 381mA, 390mA, 400mA, 450mA, 460mA, 500mA, 600mA, etc., and can be set according to the selected air pump model 133 and the design requirements of the cleaning system.

[0117] S422, if so, then it is determined that the air pump 133 is in the water pumping state.

[0118] S423, if not, then the air pump 133 is determined to be in the air extraction state.

[0119] It is understandable that since the working current value of the air pump 133 is different when pumping air and when pumping water, the working current value when pumping water is greater than the working current value when pumping air. Therefore, by judging whether the working current value of the air pump 133 is greater than the preset current threshold, the current working state of the air pump 133 can be determined.

[0120] S430, if the air pump 133 is in the water pumping state, it is determined that the cleaning water tank 210 is in the liquid full state.

[0121] It is understandable that if the air pump 133 is in the pumping state, it means that the liquid in the cleaning water tank 210 has overflowed into the liquid outlet 230, and it can be determined that the cleaning water tank 210 is full of liquid.

[0122] Furthermore, if the air pump 133 is in the pumping state, the liquid delivery device and the air pump 133 are turned off to stop the liquid injection device 130 from injecting liquid into the cleaning water tank 210, and an alarm message is output to remind the user to pay attention to the liquid level of the cleaning water tank 210, such as flashing lights on the display screen of the cleaning base station 100, or a voice broadcast: "The cleaning water tank 210 is full".

[0123] Of course, if the air pump 133 is in the pumping state, there is no need to control the liquid delivery component and the air pump 133 to shut down, and there is no need to output alarm information, so that the liquid delivery component and the air pump 133 can continue to work.

[0124] In one embodiment, the liquid level detection method further includes the following steps before obtaining the current operating current value of the air pump.

[0125] It is determined that the charging electrode 142 of the cleaning base station 100 and the electrical connection part 290 of the cleaning robot 200 are electrically connected.

[0126] It is understandable that when the charging electrode 142 and the electrical connection part 290 are in an electrically connected state, it means that the cleaning robot 200 and the cleaning base station 100 are properly connected. At this time, the main board 132 can start to detect the current operating current value of the air pump 133. This design can reduce the power consumption of the cleaning base station 100.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0128] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cleaning system, characterized in that, include: A cleaning robot has a cleaning water tank and an inlet and an outlet respectively connected to the cleaning water tank; A clean base station has a liquid injection connector, a return connector, and a liquid injection device. The liquid injection connector can be connected to the liquid inlet, and the return connector can be connected to the liquid outlet. The liquid injection device includes a base station water tank and a main board. The base station water tank is connected to the liquid injection connector via a liquid delivery component and to the return connector via an air pump. The main board is electrically connected to the liquid delivery component and the air pump, respectively, and is used to detect the current operating current value of the air pump and determine whether the air pump is in a pumping state based on the operating current value. The liquid injection connector includes a liquid injection suction cup and multiple protrusions. The liquid injection suction cup is connected to the liquid delivery component and can be adsorbed at the liquid inlet. The multiple protrusions are distributed in a ring on the inner ring wall of the liquid injection suction cup and can abut against the edge of the liquid inlet. When the air pump is in the pumping state, the main board controls the liquid delivery component and the air pump to shut down, so that the liquid injection device stops injecting liquid into the cleaning water tank.

2. The cleaning system according to claim 1, characterized in that, The injection connector also includes a spring-loaded sliding member, and the injection suction cup is fixed to the sliding member.

3. The cleaning system according to claim 2, characterized in that, The sliding component includes a sliding body and an elastic element. The liquid injection suction cup is fixed to one side of the sliding body, and the elastic element is disposed on the side of the sliding body opposite to the liquid injection suction cup, so that the liquid injection suction cup can elastically fit against the edge of the liquid inlet.

4. The cleaning system according to claim 1, characterized in that, The liquid injection device also includes a two-position three-way solenoid valve with a pressure relief port. The two-position three-way solenoid valve is connected between the liquid delivery component and the liquid injection connector, and is electrically connected to the main board. When the liquid injection device stops injecting liquid into the cleaning water tank, the main board controls the pressure relief port of the two-position three-way solenoid valve to open.

5. The cleaning system according to any one of claims 1 to 4, characterized in that, A one-way valve is provided at the liquid inlet, and the liquid inlet is connected to the cleaning water tank through the one-way valve, so that liquid can flow into the cleaning water tank from the liquid injection connector, and the liquid in the cleaning water tank is restricted from flowing out from the liquid inlet; and / or A one-way valve is provided at the liquid outlet, and the liquid outlet is connected to the cleaning water tank through the one-way valve so that liquid can flow from the cleaning water tank into the return connector, and the liquid in the return connector is restricted from flowing into the cleaning water tank.

6. The cleaning system according to claim 5, characterized in that, The one-way valve includes a valve body and a valve disc. The valve body has a liquid passage communicating with the cleaning water tank, and the valve disc is sealed in the liquid passage to allow the liquid passage to flow in one direction only.

7. A liquid level detection method, characterized in that, The liquid level detection method, applied to the cleaning system according to any one of claims 1 to 6, comprises: Obtain the current operating current value of the air pump; Determine whether the air pump is in pumping mode based on the operating current value; If the air pump is in the pumping state, then the cleaning water tank is determined to be full of liquid.

8. The liquid level detection method according to claim 7, characterized in that, The step of determining whether the air pump is in pumping mode based on the operating current value includes: Determine whether the operating current value is greater than a preset current threshold; If so, the air pump is determined to be in the water pumping state; If not, then the air pump is determined to be in the pumping state.

9. The liquid level detection method according to claim 7, characterized in that, Before obtaining the current operating current value of the air pump, the liquid level detection method further includes: It is determined that the charging electrode of the cleaning base station and the electrical connection part of the cleaning robot are in an electrically connected state.

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