Sewage pumping control method, liquid pumping system, cleaning base station and cleaning system

Abstract

The invention provides a sewage pumping control method of a cleaning base station, a liquid pumping system, the cleaning base station and a cleaning system.The cleaning base station comprises a base station body, a cleaning tank is arranged at the bottom of the base station body, and the cleaning tank is used for collecting sewage generated when the cleaning base station cleans a cleaning assembly of self-cleaning equipment; a cleaning tank is arranged in the base station body, a liquid storage container is arranged on the base station body and used for collecting sewage in the cleaning tank, and the sewage pumping control method comprises the following steps that a sewage pumping channel between the cleaning tank and the liquid storage container is closed; performing air exhaust operation on the liquid storage container until the negative pressure of the liquid storage container reaches a set threshold value; opening a sewage pumping channel between the cleaning tank and the liquid storage container; and sewage in the cleaning tank is pumped into the liquid storage container under the action of negative pressure. By means of the sewage pumping control method, the technical problems that in the process that an existing liquid pumping system pumps sewage in the sewage tank, bubble sound is obvious, and the duration time is long can be solved.

Description

Technical Field

[0001] The present invention relates to the field of cleaning equipment, and in particular to a sewage extraction control method, a liquid extraction system, a cleaning base station and a cleaning system. Background Art

[0002] As a supporting component of cleaning equipment, the cleaning base station usually needs to clean the cleaning components of the cleaning equipment. During the cleaning process, sewage mostly gathers in the cleaning tank at the bottom of the cleaning base station. A pumping system is required to pump the sewage into the liquid storage container in the pumping system for storage. The existing pumping system on the cleaning base station usually pumps negative pressure to the liquid storage container while using the negative pressure of the liquid storage container to pump the sewage in the sewage tank through a straight pipe. This causes obvious bubbling sound during the pumping process, and the sound lasts for a long time, affecting the customer experience. Therefore, it is necessary to provide a sewage pumping control method, a pumping system, a cleaning base station and a cleaning system to improve the above problems. Summary of the invention

[0003] In view of the above shortcomings of the prior art, the present invention provides a sewage pumping control method, a liquid pumping system, a cleaning base station and a cleaning system to improve the technical problem that in the process of pumping sewage in the sewage tank in the cleaning base station, the bubble sound is obvious and lasts for a long time.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a method for controlling the extraction of sewage from a cleaning base station, wherein the cleaning base station comprises a base station body, a cleaning tank is provided at the bottom of the base station body, the cleaning tank is used to collect sewage generated when the cleaning base station cleans the cleaning components of a self-cleaning device, and a liquid storage container is provided on the base station body, the liquid storage container is used to collect the sewage in the cleaning tank, and the method for controlling the extraction of sewage comprises the following steps:

[0005] closing the sewage extraction channel between the cleaning tank and the liquid storage container;

[0006] Performing a vacuum operation on the liquid storage container until the negative pressure of the liquid storage container reaches a set threshold;

[0007] Opening the sewage extraction channel between the cleaning tank and the liquid storage container;

[0008] The sewage in the cleaning tank is sucked into the liquid storage container under the action of negative pressure.

[0009] In an embodiment of the sewage extraction control method of the present invention, the control method further comprises triggering a full liquid prompt when the liquid level in the liquid storage container reaches a first preset height.

[0010] In one embodiment of the sewage extraction control method of the present invention, there is an anti-overflow area between the first preset height and the liquid level corresponding to the maximum capacity of the liquid storage container, and the volume of the anti-overflow area is greater than or equal to the volume of the cleaning tank.

[0011] In one embodiment of the sewage extraction control method of the present invention, the volume of the anti-overflow area is greater than or equal to the volume of liquid generated in the cleaning tank when the cleaning base station cleans the cleaning component once.

[0012] In one embodiment of the sewage extraction control method of the present invention, whether the liquid level in the liquid storage container reaches a first preset height is determined by detecting the liquid level in the liquid storage container, detecting the weight of the liquid storage container, or detecting the number of times the sewage extraction channel is opened and closed.

[0013] In one embodiment of the sewage extraction control method of the present invention, the control method also includes when the liquid level in the liquid storage container reaches a second preset height, under the action of negative pressure, sucking the sewage generated by a single cleaning of the cleaning component in the cleaning tank into the liquid storage container, wherein the second preset height is smaller than the first preset height, and the volume of the area between the second preset height and the first preset height is smaller than the volume of the cleaning tank.

[0014] In one embodiment of the sewage extraction control method of the present invention, the volume of the area between the second preset height and the first preset height is smaller than the volume of liquid generated in the cleaning tank when the cleaning base station cleans the cleaning component once.

[0015] In an embodiment of the sewage extraction control method of the present invention, the set threshold is positively correlated with the amount of sewage generated by the cleaning base station in the cleaning tank when the cleaning component is cleaned once.

[0016] The present invention also provides a liquid pumping system, which includes: a liquid storage container, a liquid inlet pipe, a first negative pressure device and an on-off assembly; the liquid inlet pipe is connected to the liquid storage container; the air suction port of the first negative pressure device is connected to the liquid storage container; the on-off assembly is arranged corresponding to the liquid inlet pipe, and the on-off assembly has a first state that blocks the liquid inlet pipe and a second state that connects the liquid inlet pipe; wherein, when the on-off assembly is switched to the first state, the first negative pressure device pumps air into the liquid storage container so that the negative pressure in the liquid storage container reaches a set threshold value, and when the negative pressure in the liquid storage container is maintained at the set threshold value, the on-off assembly is switched to the second state, and the negative pressure of the liquid storage container causes external liquid to enter the liquid storage container through the liquid inlet pipe.

[0017] In one embodiment of the liquid pumping system of the present invention, the on-off component includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core has an extruded state and an open state. When the valve core is in the extruded state, the on-off component is in a first state, and when the valve core is in an open state, the on-off component is in a second state.

[0018] In one embodiment of the liquid pumping system of the present invention, the pipeline on-off valve is a pneumatic pinch valve, and the liquid pumping system also includes a second negative pressure device, the exhaust port of the second negative pressure device is connected to the air inlet of the pneumatic pinch valve, and the gas discharged from the second negative pressure device drives the valve core to an extrusion state.

[0019] In one embodiment of the liquid pumping system of the present invention, the pipeline on-off valve is a pneumatic pinch valve, the air inlet of the pneumatic pinch valve is connected to the exhaust port of the first negative pressure device, and at least part of the gas discharged by the first negative pressure device drives the valve core to a squeezed state.

[0020] In one embodiment of the liquid pumping system of the present invention, the on-off component also includes a control valve, which includes an air inlet valve port, a first air outlet valve port, and a second air outlet valve port. The exhaust port of the first negative pressure device is connected to the air inlet valve port, the first air outlet valve port is connected to the air inlet of the pneumatic clamp valve, and the second air outlet valve port is connected to the atmosphere.

[0021] In an embodiment of the liquid pumping system of the present invention, the control valve is a two-position three-way solenoid valve.

[0022] In one embodiment of the liquid pumping system of the present invention, the on-off assembly also includes a pressure limiting valve, which includes a gas inlet and a gas outlet. The gas inlet is connected to the gas outlet of the pneumatic clamp valve, and the gas outlet is connected to the atmosphere.

[0023] In one embodiment of the liquid pumping system of the present invention, the on-off assembly also includes an air vent valve, which includes an air inlet interface and an air outlet interface, the air inlet interface is connected to the air outlet of the pneumatic clamp valve, and the air outlet interface is connected to the atmosphere.

[0024] In one embodiment of the liquid pumping system of the present invention, the on-off assembly includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core is rotatably arranged in the valve body, the valve body has a valve body flow channel, and the valve core has a valve core flow channel. When the non-valve core flow channel portion of the valve core corresponds to the valve body flow channel, the on-off assembly is in a first state, and when the valve core flow channel of the valve core corresponds to the valve body flow channel, the on-off assembly is in a second state.

[0025] In one embodiment of the liquid pumping system of the present invention, the pipeline on-off valve is an electric ball valve.

[0026] In one embodiment of the liquid pumping system of the present invention, the on-off component includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core is movably arranged in the valve body, and the valve body has a valve body flow channel. The valve core has a first position and a second position. When the valve core is in the first position, the on-off component is in a first state, and when the valve core is in the second position, the on-off component is in a second state.

[0027] In an embodiment of the liquid pumping system of the present invention, the pipeline on-off valve is any one of a butterfly valve, a gate valve, and an electromagnetic pinch valve.

[0028] In an embodiment of the liquid pumping system of the present invention, the liquid inlet pipeline includes a hard pipe section and a flexible pipe section, and the flexible pipe section passes through the valve core of the pneumatic pinch valve.

[0029] In one embodiment of the liquid pumping system of the present invention, the pipeline on-off valve is an electromagnetic pinch valve, the liquid inlet pipeline includes a hard pipe section and a flexible pipe section, and the flexible pipe section passes through the moving path of the valve core of the electromagnetic pinch valve.

[0030] In one embodiment of the liquid pumping system of the present invention, the liquid inlet pipeline includes a straight pipe section extending along a straight line, and the on-off assembly is arranged corresponding to the straight pipe section of the liquid inlet pipeline.

[0031] In one embodiment of the liquid pumping system of the present invention, the straight pipe section includes a first straight pipe section and a second straight pipe section, the interface at one end of the on-off component is connected to the first straight pipe section, and the interface at the other end of the on-off component is connected to the second straight pipe section.

[0032] In an embodiment of the liquid pumping system of the present invention, the time for the on-off component to switch from the first state to the second state is between 0.3s and 1s.

[0033] In one embodiment of the liquid pumping system of the present invention, the liquid pumping system also includes a pressure relief valve, which is arranged in the liquid storage container. When the negative pressure value in the liquid storage container is greater than the set threshold value, the pressure relief valve opens to connect the inner cavity of the liquid storage container with the outside air. When the negative pressure value in the liquid storage container is less than or equal to the set threshold value, the pressure relief valve closes to seal the liquid storage container.

[0034] In one embodiment of the liquid pumping system of the present invention, the pressure relief valve includes a pressure relief chamber, a sealing plate and an elastic member. One end of the pressure relief chamber is connected to the inner cavity of the liquid storage container, and the other end is provided with a pressure relief port connected to the outside atmosphere. One end of the elastic member is installed on the wall of the pressure relief chamber, and the other end presses the sealing plate tightly to seal the pressure relief port.

[0035] In an embodiment of the liquid pumping system of the present invention, a guide rod is provided on the wall of the pressure relief chamber, and the blocking plate is slidably engaged with the guide rod.

[0036] In one embodiment of the liquid pumping system of the present invention, a sliding block is provided on a side of the sealing plate facing the guide rod, a sliding groove is provided on a side of the sliding block facing the guide rod, and an end of the guide rod slides in the sliding groove; or, a sliding block is provided on a side of the sealing plate facing the guide rod, a sliding groove is provided on a side of the guide rod facing the sealing plate, and the sliding block slides in the sliding groove.

[0037] In one embodiment of the liquid pumping system of the present invention, a sealing member is provided on a side of the sealing plate facing away from the elastic member, and a projection of the pressure relief port on the sealing plate is located within a region enclosed by the sealing member.

[0038] The present invention also provides a cleaning base station, which includes a base station body and any of the above-mentioned liquid pumping systems, a cleaning trough is provided at the bottom of the base station body, the liquid pumping system is arranged in the base station body, and the end of the liquid inlet pipe away from the liquid storage container is connected to the cleaning trough.

[0039] In one embodiment of the cleaning base station of the present invention, the cleaning base station also includes a liquid level detection device, the liquid level detection device includes a detection element and a sensing member, the detection element is used to sense the position of the sensing member, the sensing member can be movably arranged in the liquid storage container, and rises as the liquid level in the liquid storage container rises; or, after the liquid level in the liquid storage container reaches a preset height, it continues to rise as the liquid level rises.

[0040] In one embodiment of the cleaning base station of the present invention, the sensing element has a rotating end and a sensing end, the rotating end is rotatably connected in the liquid storage container, and the sensing end rotates around the rotation axis of the rotating end to form movement in the height direction.

[0041] In an embodiment of the cleaning base station of the present invention, the detection element includes a magnetic member and a Hall sensor. The magnetic member is arranged at the sensing end, and the Hall sensor is arranged in the base station body and corresponds to the magnetic member.

[0042] In one embodiment of the cleaning base station of the present invention, the sensing element has a highest sensing position, which is the highest liquid level that the sensing element can sense, and the liquid storage container has a highest capacity surface, which is the liquid level corresponding to the maximum liquid that the liquid storage container can store without overflowing, and the volume between the highest sensing position and the highest capacity surface is greater than or equal to the volume of the cleaning tank.

[0043] In an embodiment of the cleaning base station of the present invention, the volume between the highest sensing position and the highest capacity surface is greater than or equal to the volume of liquid generated in the cleaning tank when the cleaning base station performs a single cleaning operation on the cleaning component.

[0044] In an embodiment of the cleaning base station of the present invention, the cleaning base station further comprises a drainage pipe, one end of the drainage pipe is connected to the liquid storage container, and the other end is a free end, and a valve component is provided on the drainage pipe.

[0045] The present invention also provides a cleaning system, which comprises a self-moving cleaning device and any one of the cleaning base stations described above.

[0046] The liquid pumping system of the present invention can realize the cutting off of the liquid inlet pipeline by setting a switch component corresponding to the liquid inlet pipeline, so that a closed space is formed inside the liquid storage container. In this way, a large negative pressure can be formed in the liquid storage container under the action of the first negative pressure device, thereby reducing the number of suctions compared to the suction operation mode of sucking dirt while pumping air, and can set the negative pressure threshold in the liquid storage container according to the volume of the cleaning tank, so that all the sewage in the cleaning tank can be sucked into the liquid storage container at one time. It can effectively improve the speed of sewage pumping and reduce the time used for sewage pumping. Because the number of suctions is reduced, the number of times the gas and sewage are combined is reduced, and the bubble sound can be reduced at the same time; in addition, compared with the suction operation mode of sucking dirt while pumping air, the cleaning base station of the present invention can obtain a greater suction force, increase the carrying rate of deposited impurities in the cleaning tank, reduce the dirt deposition at the bottom of the cleaning tank, and is conducive to achieving complete maintenance-free cleaning tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A three-dimensional schematic diagram of an embodiment of a cleaning base station of the present invention;

[0049] Figure 2 This is a view showing a cleaning base station according to an embodiment of the present invention, in which a portion of the housing is removed to expose the internal structure;

[0050] Figure 3 This is a schematic diagram of the structure of a liquid storage container in an embodiment of a cleaning base station of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of a liquid storage container after removing the box cover in an embodiment of a cleaning base station of the present invention;

[0052] Figure 5 A partial cross-sectional view of a pressure relief valve in an embodiment of a cleaning base station of the present invention;

[0053] Figure 6 A three-dimensional view of a pressure relief chamber in an embodiment of a cleaning base station of the present invention;

[0054] Figure 7 This is a schematic diagram of the connection of water and gas circuits in an embodiment of a cleaning base station of the present invention;

[0055] Figure 8 This is a schematic diagram of the connection of water and gas circuits in another embodiment of the cleaning base station of the present invention;

[0056] Fig. 9 This is a schematic diagram of the connection of water and gas circuits in another embodiment of the cleaning base station of the present invention;

[0057] Fig.10 This is a schematic diagram of the connection of water and gas circuits in another embodiment of the cleaning base station of the present invention;

[0058] Fig.11 This is a schematic diagram of the connection of water and gas circuits in another embodiment of the cleaning base station of the present invention;

[0059] Fig.12 This is a schematic diagram of the installation of a liquid level detection device in a liquid storage container in another embodiment of a cleaning base station of the present invention;

[0060] Fig.13 It is a schematic diagram of the flow chart of one embodiment of the sewage extraction control method of the present invention.

[0061] Component number description:

[0062] 10. Cleaning base station; 100. Base station body; 110. Accommodating chamber; 120. Cleaning tank; 300. Pumping system; 310. Liquid storage container; 314. Box; 311. Sewage joint; 312. Air extraction hole; 313. Liquid level detection device; 3131. Inductive element; 3132. Rotating end; 3133. Inductive end; 3134. Magnetic element; 320. Box cover; 321. Pressure relief chamber; 322. First through hole; 330. Pressure relief valve; 331. Pressure relief cover; 332. Sealing element; 333. Blocking plate; 334. Elastic element; 335. Pressure relief port; 336. Shielding plate; 3361. Second through hole; 337. Sliding block; 338. Guide Rod; 339, sliding groove; 400, first negative pressure device; 500, liquid inlet pipeline; 510, straight pipe section; 511, first straight pipe section; 512, second straight pipe section; 513, flexible pipe section; 600, on-off assembly; 610, valve body; 611, first interface; 620, control unit; 621, air release valve; 6211, air inlet interface; 6212, air outlet interface; 622, pipe joint; 623, pressure limiting valve; 6231, gas inlet; 6232, gas outlet; 624, control valve; 6241, air inlet valve port; 6242, first air outlet valve port; 6243, second air outlet valve port; 625, second negative pressure device; 700, controller. DETAILED DESCRIPTION

[0063] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0064] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any methods, equipment and materials of the prior art similar or equivalent to the methods, equipment and materials described in the embodiments of the present invention can also be used to implement the present invention.

[0065] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0066] See also Figures 1 to 13 The present invention provides a method for controlling the extraction of sewage from a cleaning base station, wherein the cleaning base station comprises a base station body, a cleaning tank is provided at the bottom of the base station body, and the cleaning tank is used to collect sewage generated when the cleaning base station cleans the cleaning components of a self-cleaning device, and a liquid storage container is provided on the base station body, and the liquid storage container is used to collect the sewage in the cleaning tank. The method for controlling the extraction of sewage comprises the following steps:

[0067] S1, closing the sewage extraction channel between the cleaning tank and the liquid storage container;

[0068] S2, evacuating the liquid storage container until the negative pressure of the liquid storage container reaches a set threshold;

[0069] S3, opening the sewage extraction channel between the cleaning tank and the liquid storage container;

[0070] S4. The sewage in the cleaning tank is pumped into the liquid storage container under the action of negative pressure.

[0071] In step S1, closing the sewage extraction channel can be achieved through a variety of means, such as setting an on-off component on the pipeline of the sewage extraction channel, installing a valve in the cleaning tank that can close the sewage discharge port of the cleaning tank, or setting a valve on the liquid storage container that can close the sewage extraction port on the liquid storage container. Preferably, in this embodiment, the liquid storage container is set at the top of the cleaning base station, and the cleaning tank is set at the bottom of the cleaning base station. The liquid storage container is connected to the bottom of the cleaning tank through a liquid inlet pipe. The sewage extraction channel includes an inner cavity of the liquid inlet pipe, and a part of the liquid inlet pipe is set as a soft pipe. The soft pipe section is clamped by a pipe clamp valve to achieve closing and opening control of the pipe. This arrangement can reduce the pollution of sewage to the on-off component and extend the service life of the on-off component.

[0072] In step S2, after the sewage extraction channel is closed, a closed chamber is formed in the liquid storage container. At this time, the liquid storage container is evacuated to generate negative pressure inside the liquid storage container. The evacuation operation can be completed by the negative pressure device provided on the cleaning base station, or by another negative pressure device, which is not limited here. When the negative pressure of the liquid storage container reaches a set threshold during the evacuation operation, the evacuation operation is stopped. The selection of the set threshold can be obtained through fluid mechanics calculations, or can be obtained based on experiments or experience.

[0073] In step S3, the sewage extraction channel between the cleaning tank and the liquid storage container is opened. In this process, the opening time of the sewage extraction channel in the present invention may not be too limited, but considering that the opening speed of the sewage extraction channel has an important influence on the sewage extraction and collection effects, too slow an opening speed of the sewage extraction channel will lead to insufficient pressure at the beginning of suction, and the dirt sediment in the cleaning tank cannot be completely pumped out, and it may also cause blockage of the sewage extraction channel. Preferably, in an embodiment of the cleaning base station of the present invention, the flow channel diameter of the sewage extraction channel is 15mm to 20mm, and the opening time of the sewage extraction channel is between 0.3s and 1s. Within this flow channel diameter range and under the limitation of the opening time, it can be ensured that the sewage extraction channel has sufficient negative pressure suction force when it is fully opened, and a better sewage extraction effect can be obtained.

[0074] In step S4, after the sewage extraction channel between the cleaning tank and the liquid storage container is connected, the sewage in the cleaning tank can be quickly sucked into the liquid storage container under the action of a large negative pressure, which can reduce the number of intermittent sewage extraction. It is even possible to set a negative pressure threshold to drain all the sewage in the cleaning tank at one time, reducing the number of times the sewage comes into contact with the air, effectively reducing the bubble sound, and shortening the sewage extraction time.

[0075] In one embodiment of the sewage extraction control method of the present invention, the control method also includes triggering a full liquid prompt when the liquid level in the liquid storage container reaches a first preset height, and prompting on the terminal APP, for example, "The liquid storage container is full, please dump it in time". After the full liquid prompt is triggered, the base station body cannot clean the cleaning component.

[0076] In one embodiment of the sewage extraction control method of the present invention, there is an overflow prevention area between the first preset height and the liquid level height corresponding to the maximum capacity of the liquid storage container, and the volume of the overflow prevention area is greater than or equal to the volume of the cleaning tank. It should be noted that the maximum capacity refers to the maximum amount of water that the liquid storage container can hold without the sewage overflowing the liquid storage container.

[0077] In one embodiment of the sewage extraction control method of the present invention, the volume of the anti-overflow area is greater than or equal to the volume of liquid generated in the cleaning tank when the cleaning base station cleans the cleaning component once. It should be noted that a single time includes the entire process from the start of cleaning of the cleaning component to the completion of cleaning of the cleaning component.

[0078] In the sewage extraction control method of the present invention, whether the liquid level in the liquid storage container reaches the first preset height is determined by detecting the liquid level in the liquid storage container, detecting the weight of the liquid storage container, or detecting the number of times the sewage extraction channel is switched. In one embodiment, a liquid level detection device for detecting the liquid level in the liquid storage container is provided in the liquid storage container. The type of liquid level detection device is not limited, including but not limited to a magnetic flap level gauge, a float level gauge, a steel belt level gauge, a radar level gauge, a differential pressure level gauge, etc. In this embodiment, the liquid level detection device is a Hall sensor type liquid level sensor, and the Hall sensor type liquid level sensor includes a detection element and a sensing member, and the sensing member can be movably arranged in the liquid storage container and rises with the increase of the liquid level in the liquid storage container, or after the liquid level in the liquid storage container reaches a preset height, the sensing member continues to rise with the increase of the liquid level. The Hall sensor type liquid level sensor has high accuracy and strong anti-interference ability.

[0079] In another embodiment of the control method of the present invention, whether the liquid level in the liquid storage container reaches the first preset height is determined by detecting the weight of the liquid storage container. In the vertical direction, a pressure sensor is provided on the surface where the base station body contacts the liquid storage container or on the surface where the liquid storage container contacts the base station body, and the weight of the liquid storage container is detected by the pressure sensor. When the sewage collected in the liquid storage container reaches the preset height, its weight is basically the same, but it should be noted that due to the different impurities contained in the sewage, the pressure sensor is set with a certain error range, for example, an error of ±0.1kg is allowed.

[0080] In another embodiment of the control method of the present invention, whether the liquid level in the liquid storage container reaches the first preset height is determined by detecting the number of times the sewage extraction channel is switched on and off. A counter is built into the valve body on the sewage extraction channel, and the number of switches is counted by the counter. The amount of sewage generated by a single cleaning of the cleaning component in the cleaning tank is quantified (error is allowed, error ±10ml), for example, the amount of sewage generated at one time is 150ml, and the amount of water corresponding to the preset height of the liquid storage container is 4.3L (the maximum capacity of the liquid storage container is 4.5L), then the first preset height is reached after about 28-29 extractions. It should be noted that the number of switches can be only one corresponding to opening, or only one corresponding to closing, or one closing and the subsequent opening process can be attributed to one time.

[0081] In one embodiment of the sewage extraction control method of the present invention, the control method further includes, when the liquid level in the liquid storage container reaches a second preset height, sucking the sewage generated by a single cleaning of the cleaning component in the cleaning tank into the liquid storage container under the action of negative pressure, wherein the second preset height is less than the first preset height, and the volume of the area between the second preset height and the first preset height is less than the volume of the cleaning tank. Specifically, the first preset height is the highest liquid level position that the sensor can detect, that is, the full liquid alarm level, because the volume of the area between the second preset height and the first preset height is less than the volume of the cleaning tank, so at this time, if the sewage in the full cleaning tank is sucked into the liquid storage container, the final liquid level will be higher than the first preset height and less than the maximum capacity of the liquid storage container, so that not only can the full liquid alarm be triggered after the suction is completed, but also the liquid storage capacity of the liquid storage container can be increased when the volume of the liquid storage container is constant.

[0082] In another embodiment of the sewage pumping control method of the present invention, the volume of the area between the second preset height and the first preset height is smaller than the volume of liquid generated in the cleaning tank when the cleaning base station performs a single cleaning operation on the cleaning component. Because the volume of the area between the second preset height and the first preset height is smaller than the volume of liquid generated in the cleaning tank when the cleaning base station performs a single cleaning operation on the cleaning component, the final liquid level after the sewage in the cleaning tank is pumped into the liquid storage container for the current cleaning will be higher than the first preset height and less than the maximum capacity of the liquid storage container, so that not only the sewage pumping work for the current cleaning can be completed, but also a full liquid alarm can be triggered after the pumping is completed, and at the same time, the liquid storage capacity of the liquid storage container can be increased when the volume of the liquid storage container is constant.

[0083] In an embodiment of the sewage extraction control method of the present invention, the set threshold is positively correlated with the amount of sewage generated by the cleaning base station in the cleaning tank when the cleaning component is cleaned once. In this way, the negative pressure threshold in the liquid storage container can be set according to the amount of sewage in the cleaning tank, ensuring that all the sewage generated by the cleaning base station in a single cleaning of the cleaning component is sucked into the liquid storage container at one time under the set negative pressure threshold.

[0084] Please refer to Figures 1 to 12 The present invention provides a pumping system 300 and a cleaning base station 10 and a cleaning system including the pumping system 300. The pumping system 300 can be applied not only to the cleaning base station 10 to pump and store the sewage in the cleaning tank 120, but also to any suitable pumping equipment, such as: a fish tank water changing device, a dishwasher, a cleaning base station 10 and other equipment that needs to perform a pumping operation. However, for the sake of convenience, the cleaning base station 10 is used as an example for description.

[0085] See also Figure 1 and Figure 2 , the cleaning base station 10 of the present invention includes: a base station body 100, a cleaning tank 120 and a liquid extraction system 300. The appearance of the base station body 100 is not limited. For example, it can be roughly rectangular as a whole, or the lower part can be rectangular and the top can be spherical, but it is not limited to this. Considering the needs of indoor furnishings, it is better to be beautiful and small in size. The base station body 100 usually includes a accommodating cavity 110. The accommodating cavity 110 is arranged at the bottom of the base station body 100 and has an opening for the cleaning equipment to enter. The accommodating cavity 110 is also usually provided with a charging terminal that can be electrically connected to the charging equipment to charge the cleaning equipment. However, it should be noted that if charging is not considered, the charging terminal may not be provided on the base station body 100 of the present invention.

[0086] See also Figure 1 and Figure 2 The cleaning tank 120 is provided at the bottom of the base station body 100 and is used to clean the cleaning components of the cleaning equipment. The structure and shape of the cleaning tank 120 can be square, circular or irregular, but not limited thereto, and it is preferred that the cleaning components of the cleaning equipment can be at least partially accommodated in the height direction and cleaned. During the cleaning process of the cleaning components of the cleaning equipment, the cleaning tank 120 will collect and store sewage to prevent the sewage from flowing out and polluting the indoor floor.

[0087] See also Figure 4 and Figure 7, the liquid pumping system 300 includes: a liquid storage container 310, a liquid inlet pipe 500, a first negative pressure device 400 and a switch assembly 600. The shape and structure of the liquid storage container 310 are also not limited, so as to facilitate manufacturing and have sufficient strength to not deform when the negative pressure is pumped to a set threshold. One end of the liquid inlet pipe 500 is connected to the top of the liquid storage container 310, and the other end of the liquid inlet pipe 500 is connected to the liquid to be pumped, such as sewage in the cleaning tank 120; the air suction port of the first negative pressure device 400 is connected to the liquid storage container 310; the first negative pressure device 400 can be any suitable device that can realize the suction of gas, such as a vacuum pump, a centrifugal exhaust fan, an axial flow exhaust fan, a plunger pump, etc., but is not limited to this. There is no limit to the connection method between the air suction port of the first negative pressure device 400 and the liquid storage container 310. For example, a hole can be opened on the wall above the highest liquid level surface of the liquid storage container 310 to form the air suction hole 312, and the air suction port of the first negative pressure device 400 can be directly connected to the air suction hole 312, or the air suction port of the first negative pressure device 400 can be indirectly connected to the air suction hole 312 through a pipeline. The on-off component 600 is arranged corresponding to the liquid inlet pipe 500, and the on-off component 600 has a first state in which the liquid inlet pipe 500 is blocked and a second state in which the liquid inlet pipe 500 is connected; when the on-off component 600 is switched to the first state, the first negative pressure device 400 evacuates the liquid storage container 310 to make the negative pressure in the liquid storage container 310 reach a set threshold value. When the negative pressure in the liquid storage container 310 is maintained at the set threshold value, the on-off component 600 is switched to the second state, and the sewage in the cleaning tank 120 is sucked into the liquid storage container 310 from the liquid inlet pipe 500 under the action of the negative pressure in the liquid storage container 310. It should be noted that the selection of the set threshold value can be obtained by comprehensive calculation based on the volume of the liquid to be pumped, the diameter of the liquid inlet pipe 500, and the suction distance, or can be obtained through experiments. Considering the diameter of the liquid inlet pipe 500 of the existing cleaning base station 10, the distance from the liquid storage container 310 to the cleaning tank 120, and the volume of the cleaning tank 120, the threshold value is set to 30Kpa in this embodiment. It should also be noted that, considering the existence of errors, slight fluctuations above and below the set threshold value are all considered "maintained", and slight fluctuations refer to ±10Kpa.

[0088] See also Figures 2 to 4In an embodiment of the liquid pumping system 300 of the present invention, the liquid storage container 310 is arranged on the base station body 100, and the setting position can be set as needed, preferably to facilitate the dumping of sewage or the removal of the liquid storage container 310. In an embodiment of the cleaning base station 10 of the present invention, the liquid storage container 310 is detachably installed on the upper part of the base station body 100. The shape and structure of the liquid storage container 310 are also not limited, so as to facilitate manufacturing, and have sufficient strength to not deform when the negative pressure is pumped to the set threshold. One end of the liquid inlet pipe 500 is connected to the liquid storage container 310, and the other end of the liquid inlet pipe 500 is connected to the cleaning tank 120; the structure of the liquid storage container 310 in the liquid pumping system 300 of the present invention is not limited, considering that the main function of the liquid storage container 310 on the cleaning base station 10 is to collect sewage in the cleaning tank 120, and in order to dump sewage, and convenient For cleaning, the liquid storage container 310 on the cleaning base station 10 mostly includes a box body 314 and a box cover 320 sealed and installed on the box body 314. As long as the box cover 320 can reliably seal the sewage cavity in the box body 314, the installation method of the box cover 320 on the box body 314 is not limited. For example, the box cover 320 can be completely separated from the box body 314 and snap-fitted with the box body 314 through multiple sets of snap-fit ​​components, or one side of the box cover 320 can be rotatably connected to the box body 314, and the other side can be snap-fitted with the box body 314 through the snap-fit ​​component.

[0089] As long as the liquid inlet pipeline 500 can be switched between the first state and the second state, the type of the on-off assembly 600 in the present invention is not limited. For example, the on-off assembly 600 can be any one or more of a manual valve, an electric valve, an electromagnetic valve, a pneumatic pinch valve, and a hydraulic pinch valve, but is not limited thereto. The on-off assembly 600 is installed on the liquid inlet pipeline 500 and / or a corresponding body, such as the base station body 100. The specific installation form of the on-off assembly 600 on the liquid inlet pipeline 500 and / or the base station body 100 is determined comprehensively according to the type of the liquid inlet pipeline 500 and the type of the on-off assembly 600. In one embodiment of the liquid pumping system 300 of the present invention, the on-off assembly 600 includes a pipeline on-off valve, which includes a valve body 610 and a valve core (not shown). The valve body 610 is installed on the liquid inlet pipeline 500 and / or the corresponding base station body 100. The valve core is connected to the valve body 610 and has a squeezed state and an open state. When the valve core is in the squeezed state, the on-off assembly 600 is in a first state, and the liquid inlet pipeline 500 is closed. When the valve core is in an open state, the on-off assembly 600 is in a second state, and the liquid inlet pipeline 500 is connected to the liquid storage container 310.

[0090] See also Figure 2 , Fig. 9In an embodiment of the liquid pumping system 300 of the present invention, the pipeline on-off valve is a pneumatic pinch valve, the air inlet of the pneumatic pinch valve is connected to the exhaust port of the first negative pressure device 400, and at least part of the gas discharged by the first negative pressure device 400 drives the valve core to the extrusion state, and drives the pneumatic pinch valve to clamp and block the liquid inlet pipeline 500. This arrangement can drive the pneumatic pinch valve to operate while the first negative pressure device 400 pumps air from the liquid storage container 310, and realize the cutting and connecting of the liquid inlet pipeline 500. By directly driving the pneumatic pinch valve by the first negative pressure device 400, the system design can be simplified and the manufacturing and maintenance costs can be reduced.

[0091] See also Fig.11 In an embodiment of the liquid pumping system 300 of the present invention, the pipeline on-off valve is a pneumatic pinch valve, and the liquid pumping system 300 further includes a second negative pressure device 625, the exhaust port of the second negative pressure device 625 is connected to the air inlet of the pneumatic pinch valve, and the gas discharged by the second negative pressure device 625 drives the valve core to the squeezed state. By providing the second negative pressure device 625 that independently supplies air to the pneumatic pinch valve, the opening and closing of the pneumatic pinch valve will not be affected by the action of the first negative pressure device 400, and the pneumatic pinch valve can be turned off before the first negative pressure device 400 performs the air pumping operation on the liquid storage container 310, which can accelerate the formation speed of negative pressure in the liquid storage container 310.

[0092] See also Fig. 9 In an embodiment of the pumping system 300 of the present invention, the on-off assembly 600 further includes a control valve 624, which is a two-position three-way solenoid valve. The control valve 624 includes an air inlet valve port 6241, a first air outlet valve port 6242, and a second air outlet valve port 6243. The exhaust port of the first negative pressure device 400 is connected to the air inlet valve port 6241; the first air outlet valve port 6242 is connected to the air inlet of the pneumatic pinch valve, and the second air outlet valve port 6243 is connected to the atmosphere. It should be noted that those skilled in the art can understand that the structure of the control valve 624 can also be other valve structures with the same function as the two-position three-way solenoid valve.

[0093] See also Figure 2 , Fig. 9 , Fig.10 In an embodiment of the pumping system 300 of the present invention, the on-off assembly 600 further includes a pressure limiting valve 623, and the pressure limiting valve 623 includes a gas inlet 6231 and a gas outlet 6232. The gas inlet 6231 is connected to the gas outlet of the pneumatic pinch valve, and the gas outlet 6232 is connected to the atmosphere. The types of the pressure limiting valve 623 include but are not limited to safety valves, pressure reducing valves, relief valves, etc. The pressure limiting valve 623 can prevent the pressure inside the pneumatic pinch valve from exceeding the design bearing capacity and causing explosion or rupture, and can effectively protect the pneumatic pinch valve.

[0094] See also Figure 2 and Figures 9 to 11 In an embodiment of the liquid pumping system 300 of the present invention, the on-off assembly 600 further includes a deflation valve 621, and the deflation valve 621 includes an air inlet interface 6211 and an air outlet interface 6212. The air inlet interface 6211 is connected to the air outlet of the pneumatic pinch valve, and the air outlet interface 6212 is connected to the atmosphere. The deflation valve 621 can quickly discharge the gas in the pneumatic pinch valve, thereby increasing the opening speed of the pneumatic pinch valve.

[0095] In another embodiment of the pumping system 300 of the present invention, the on-off assembly 600 includes a pipeline on-off valve, which includes a valve body 610 and a valve core (not shown). The valve body 610 is installed on the liquid inlet pipeline 500 and / or the corresponding base station body 100. The valve core is rotatably arranged in the valve body 610. The valve body 610 has a valve body flow channel, and the valve core has a valve core flow channel. When the non-valve core flow channel portion of the valve core corresponds to the valve body flow channel, the on-off assembly 600 is in a first state, and when the valve core flow channel of the valve core corresponds to the valve body flow channel, the on-off assembly 600 is in a second state. This kind of pipeline on-off valve can realize the cutting and opening of the liquid inlet pipeline 500 by rotating the valve core, has good operability, and is easy to further adopt electric control. Preferably, in an embodiment of the pumping system 300 of the present invention, the pipeline on-off valve is an electric ball valve. An electric ball valve is a valve that opens and closes by driving the ball to rotate via an electric actuator. It has low cost and high reliability.

[0096] In an embodiment of the pumping system 300 of the present invention, the on-off assembly 600 includes a pipeline on-off valve, which includes a valve body 610 and a valve core (not shown). The valve body 610 is installed on the liquid inlet pipeline 500 and / or the corresponding base station body 100. The valve core is movably arranged in the valve body 610. The valve body 610 has a valve body flow channel. The valve core has a first position and a second position. When the valve core is in the first position, the on-off assembly 600 is in a first state. When the valve core is in the second position, the on-off assembly 600 is in a second state. In this scheme, the on-off assembly 600 is switched between the first state and the second state by moving the valve core relative to the valve body 610. The on-off valve can have a smaller displacement on the cut-off path and a higher response speed. The pipeline on-off valve is any one of a butterfly valve, a gate valve, and an electromagnetic pinch valve. The butterfly valve has a simple opening and closing operation and a small fluid resistance. The gate movement direction is perpendicular to the medium flow direction, and the opening and closing is more labor-saving. The liquid inlet pipeline 500 is provided with a flexible pipe section 513. The valve core of the electromagnetic pinch valve compresses and releases the soft pipeline by moving between a first position and a second position, thereby realizing the opening and closing of the liquid inlet pipeline 500. Compared with other types of solenoid valves, the liquid does not contact the valve core part of the electromagnetic pinch valve, and the valve has a longer service life.

[0097] The type of the liquid inlet pipeline 500 in the present invention can be selected according to the type of the on-off component 600. Preferably, in an embodiment of the liquid pumping system 300 of the present invention, the on-off component 600 includes a valve body 610 and a valve core. The valve body 610 is installed on the liquid inlet pipeline 500 and / or the corresponding base station body 100. The valve core is connected to the valve body 610 and has a squeezed state and an open state. The liquid inlet pipeline 500 includes a hard pipe section and a flexible pipe section 513. The connection method between the hard pipe section and the flexible pipe section 513 is not limited, and a reliable sealing connection is the standard. The hard pipe section is arranged in an area outside the valve core of the pneumatic pinch valve, and the flexible pipe section 513 passes through the valve core of the pneumatic pinch valve. When the valve core is in the squeezed state, the valve core squeezes the flexible pipe section 513, so that the on-off assembly 600 is in the first state, at which time the liquid inlet pipeline 500 is shut off; when the valve core is in the open state, the valve core releases the squeezing of the flexible pipe section 513, and the on-off assembly 600 is in the second state, at which time the liquid inlet pipeline 500 is connected to the liquid storage container 310. The flexible pipe section 513 is provided, and the flexible pipe section 513 is blocked by clamping the valve core, so that sewage does not pass through the internal flow channel of the valve core, does not cause corrosion and damage to the valve core, and can increase the service life of the on-off assembly 600. In other embodiments, the liquid inlet pipeline 500 is divided into two sections, one end of which is connected to the inlet of the pneumatic pinch valve, and one end of which is connected to the outlet of the pneumatic pinch valve. The liquid inlet pipeline is shut off and connected by the squeezed state and open state of the valve core of the pneumatic pinch valve.

[0098] In an embodiment of the pumping system 300 of the present invention, the on-off assembly 600 includes a pipeline on-off valve, which is an electromagnetic pinch valve, and the liquid inlet pipeline 500 includes a hard pipe section and a flexible pipe section 513, and the flexible pipe section 513 passes through the moving path of the valve core of the electromagnetic pinch valve. The valve core of the electromagnetic pinch valve compresses or releases the flexible pipe section 513 during the movement, thereby closing or opening the liquid inlet pipeline 500.

[0099] See also Figures 7 to 11 In an embodiment of the liquid extraction system 300 of the present invention, the liquid inlet pipeline 500 includes a straight pipe section 510 extending in a straight line, and the on-off assembly 600 is arranged corresponding to the straight pipe section 510 of the liquid inlet pipeline 500. By arranging the on-off assembly 600 on the straight pipe section 510, not only the sewage extraction efficiency and system stability are improved, but also the residual sewage and pressure loss at the position of the on-off assembly 600 are reduced, making the operation of the entire cleaning base station 10 more efficient, reliable and economical.

[0100] In the pumping system 300 of the present invention, the straight pipe section 510 can be an integral section or can be formed by connecting multiple pipe sections, depending on the structure and installation method of the on-off assembly 600. Figure 7 In an embodiment of the pumping system 300 of the present invention, the liquid inlet pipeline 500 includes a first straight pipe section 511 and a second straight pipe section 512, the interface at one end of the on-off assembly 600 is connected to the first straight pipe section 511, and the interface at the other end of the on-off assembly 600 is connected to the second straight pipe section 512. In the second state, the on-off assembly 600 includes a flow channel that runs through in a straight line, the interface at one end of the flow channel is connected to the first straight pipe section 511, and the interface at the other end of the flow channel is connected to the second straight pipe section 512, and the first straight pipe section 511, the flow channel, and the second straight pipe section 512 are connected to each other to form a sewage channel extending along a vertical straight line. This arrangement can reduce the resistance of the valve body 610, reduce the energy loss of sewage passing through the valve body 610 during the suction process, and prevent dirt from clogging the flow channel of the valve body 610.

[0101] In an embodiment of the liquid pumping system 300 of the present invention, the opening time of the on-off component 600 of the present invention may not be too limited, but considering that the opening speed of the on-off component 600 has an important influence on the sewage extraction and collection effects, the on-off component 600 is opened too slowly, which will lead to insufficient pressure at the beginning of suction, and the dirt precipitation in the cleaning tank 120 cannot be completely pumped out, and it may also cause the blockage of the liquid inlet pipe 500. Preferably, in an embodiment of the cleaning base station 10 of the present invention, the time for the on-off component 600 to switch from the first state to the second state is between 0.3s and 1s. Under this opening time limitation, it can be ensured that the flow channel of the on-off component 600 has sufficient negative pressure suction force when it is fully opened, and a better sewage extraction effect can be obtained.

[0102] See also Figures 3 to 6 In an embodiment of the pumping system 300 of the present invention, the pumping system 300 further includes a pressure relief valve 330, which is disposed in the liquid storage container 310. When the negative pressure value in the liquid storage container 310 is greater than the set threshold, the pressure relief valve 330 is opened to allow the inner cavity of the liquid storage container 310 to communicate with the outside air. When the negative pressure value in the liquid storage container 310 is less than or equal to the set threshold, the pressure relief valve 330 is closed to seal the liquid storage container 310. The structure of the pressure relief valve 330 and the installation method on the liquid storage container 310 are not limited. For example, the pressure relief valve 330 can be installed on the box body 314 and located above the highest liquid level surface, or it can be installed on the box cover 320. When the negative pressure in the liquid storage container 310 is less than the set threshold, the pressure relief valve 330 is opened to allow air to enter the liquid storage container 310. By providing the pressure relief valve 330 , when the vacuum in the liquid storage container 310 is too high, air can be replenished automatically, which can not only maintain the negative pressure in the liquid storage container 310 at a set threshold, but also effectively prevent the liquid storage container 310 from being damaged.

[0103] See also Figures 3 to 6 The pressure relief valve 330 in the present invention can also refer to the existing gas pressure limiting valve structure and be obtained through general commercial means. Preferably, refer to Figures 5 and 6In an embodiment of the pumping system 300 of the present invention, the pressure relief valve 330 includes a pressure relief chamber 321, a pressure relief cover 331, a sealing plate 333 and an elastic member 334. One end of the pressure relief chamber 321 is connected to the inner cavity of the liquid storage container 310, and the other end is provided with a pressure relief port 335 connected to the outside atmosphere. One end of the elastic member 334 is installed on the wall of the pressure relief chamber 321, and the other end presses the sealing plate 333 against the pressure relief port 335 to seal it. The shape of the pressure relief chamber 321 is not limited, and can be a rectangular parallelepiped, a cylinder or an irregular shape. In the present embodiment, the pressure relief chamber 321 is a cylindrical cavity, and a first through hole 322 is provided on the bottom wall of the pressure relief chamber 321. The pressure relief chamber 321 is connected with the inner cavity of the liquid storage container 310 through the first through hole 322. The pressure relief cover 331 is sealed on the pressure relief chamber 321, and the pressure relief port 335 is provided on the pressure relief cover 331. A baffle plate 336 is provided on the pressure relief port 335 to prevent dust from clogging the pressure relief port 335. A second through hole 3361 is provided on the baffle plate 336. The pressure relief port 335 is connected with the external atmospheric environment through the second through hole 3361. In the present invention, the elastic member 334 can be any suitable structure that can provide elastic force to seal the sealing plate 333 to the pressure relief port 335, such as a bent elastic spring, a spring, etc., but is not limited to this. Preferably, the elastic member 334 in this embodiment is a spring, and the lower end of the elastic member 334 is installed on the wall of the pressure relief chamber 321. The upper end of the elastic member 334 presses the sealing plate 333 against the pressure relief cover 331 and seals the pressure relief port 335. The sealing plate 333 and the pressure relief cover 331 are sealed and abutted. In the non-pressure relief state, under the action of the elastic member 334, the sealing plate 333 is sealed and pressed against the pressure relief cover 331 and seals the pressure relief port 335. The elastic force of the elastic member 334 that makes the sealing plate 333 seal against the pressure relief cover 331 is determined according to the maximum value of the set threshold of the liquid storage container 310. When the negative pressure in the liquid storage container 310 is greater than the maximum value of the set threshold, the external air pressure causes the elastic member 334 to be further compressed, and the pressure relief port 335 is opened to allow air to enter. When the negative pressure in the liquid storage container 310 is less than or equal to the maximum value of the set threshold, the sealing plate 333 is sealed against the pressure relief cover 331 under the elastic force of the elastic member 334. In this solution, the pressure relief control of the pressure relief valve 330 is realized by the elastic member 334, and no additional electrical control connection is required. The safety is relatively high and the cost is low. At the same time, it is also convenient to open or remove the box cover 320.

[0104] See also Figures 3 to 6Although the elastic member 334 in the pressure relief valve 330 of the present invention has a relatively large rigidity and can also provide a movement limit for the blocking plate 333, considering the stability of the blocking plate 333 during the movement, preferably, in an embodiment of the pumping system 300 of the present invention, a guide rod 338 is provided on the wall of the pressure relief chamber 321, and the blocking plate 333 and the guide rod 338 are slidably matched. Through the slidable match between the blocking plate 333 and the guide rod 338, the blocking plate 333 can be relatively stably installed in the pressure relief chamber 321, and the blocking plate 333 will not be offset or misaligned during the sliding process, thereby improving the sealing reliability of the blocking plate 333.

[0105] See also Figures 3 to 6 In the present invention, there are multiple sliding matching modes between the blocking plate 333 and the guide rod 338. In one embodiment of the pumping system 300 of the present invention, a sliding block 337 is provided on the side of the blocking plate 333 facing the guide rod 338, and a sliding groove 339 is provided on the side of the sliding block 337 facing the guide rod 338, and the end of the guide rod 338 slides in the sliding groove 339. In other embodiments, the side of the blocking plate 333 facing the guide rod 338 may also be provided with a sliding block 337, and the side of the guide rod 338 facing the blocking plate 333 may be provided with a sliding groove 339, and the sliding block 337 slides in the sliding groove 339. The root of the guide rod 338 is provided with a truncated cone matching the inner hole of the spring, and one end of the spring is sleeved on the sliding block 337, and the other end is sleeved on the truncated cone at the root of the guide rod 338.

[0106] See also Figures 3 to 6 In the present invention, although the sealing member 332 may not be provided and the sealing connection between the sealing plate 333 and the pressure relief port 335 may be achieved only by selecting the material of the sealing plate 333, preferably, in an embodiment of the pumping system 300 of the present invention, the sealing member 332 is provided on the side of the sealing plate 333 away from the elastic member 334, and the projection of the pressure relief port 335 on the sealing plate 333 is located within the area enclosed by the sealing member 332. This setting method can form an end face sealing structure with pre-tightening pressure between the sealing plate 333, the sealing member 332 and the pressure relief cover 331 when the sealing plate 333 is pressed against the edge of the pressure relief port 335, which has a better sealing effect than the radial sealing method.

[0107] See also Figure 1 to Figure 2The present invention also provides a cleaning base station 10, which includes a base station body 100 and any of the above-mentioned liquid pumping systems 300. The cleaning tank 120 is arranged at the bottom of the base station body 100 to clean the cleaning components of the cleaning equipment. The liquid pumping system 300 is arranged in the base station body 100, and the end of the liquid inlet pipe 500 away from the liquid storage container 310 is connected to the cleaning tank 120.

[0108] It should be noted that, in the cleaning base station 10, if the on-off component 600 is not provided, when the liquid inlet pipe 500 is not closed, when the liquid storage container 310 is evacuated, as long as the negative pressure reaches the pressure that can suck part of the sewage into the liquid storage container 310, the sewage will automatically enter the liquid storage container 310 along the liquid inlet pipe 500. At this time, the pressure in the liquid storage container 310 will increase until the negative pressure in the liquid storage container 310 cannot meet the minimum suction force required for sewage extraction. At this time, sewage extraction will be interrupted. When the air extraction operation continues until the negative pressure in the liquid storage container 310 is again sufficient to suck part of the sewage into the liquid storage container 310, the sewage extraction operation will continue. After repeated multiple times, the sewage in the cleaning tank 120 is drained. In this process, the sewage extraction work is interrupted multiple times. Each time the sewage extraction starts, the sewage will re-combine with the air, so the bubble sound is large, and the overall operation time of this method is intermittent. In the present invention, since the sewage extraction channel is closed, a large negative pressure can be accumulated.

[0109] In the liquid pumping system 300 of the cleaning base station 10 of the present invention, by arranging the on-off assembly 600 on the liquid inlet pipe 500 between the liquid storage container 310 and the cleaning tank 120, the relative isolation of the liquid storage container 310 and the cleaning tank 120 cavity can be achieved. In this way, a large negative pressure can be formed in the liquid storage container 310 under the action of the first negative pressure device 400, and the sewage in the cleaning tank 120 can be sucked under the action of the negative pressure. Compared with the suction operation mode of sucking sewage while pumping air, the number of suctions can be reduced, and the negative pressure threshold in the liquid storage container 310 can be set by the volume of the cleaning tank 120, the diameter of the liquid inlet pipe 500, and the distance from the liquid storage container 310 to the cleaning tank 120, so that all the sewage in the cleaning tank 120 can be sucked into the liquid storage container 310 at one time. It can effectively improve the sewage pumping speed and reduce the time used for sewage pumping. Furthermore, since the number of suction times is reduced, the number of times gas and sewage combine is reduced, and the bubble sound can be reduced at the same time; in addition, the cleaning base station 10 of the present invention can obtain a greater suction force than the suction operation method of sucking air and sewage at the same time, and can increase the carrying rate of deposited impurities in the cleaning tank 120, and can reduce the dirt deposition at the bottom of the cleaning tank 120, which is conducive to achieving complete maintenance-free cleaning tank 120.

[0110] See also Figure 4 and Fig.12In an embodiment of the cleaning base station 10 of the present invention, the pumping system 300 further includes a liquid level detection device 313 for detecting the sewage level. The type of the liquid level detection device 313 is not limited, including but not limited to a magnetic flap level gauge, a float level gauge, a steel belt level gauge, a radar level gauge, a differential pressure level gauge, etc. In this embodiment, the liquid level detection device 313 is a Hall sensor type liquid level sensor. The Hall sensor type liquid level sensor includes a detection element and a sensing element 3131. The sensing element 3131 can be movably arranged in the liquid storage container 310, and rises with the increase of the liquid level in the liquid storage container 310, or after the liquid level in the liquid storage container 310 reaches a preset height, the sensing element 3131 continues to rise with the increase of the liquid level. The Hall sensor type liquid level sensor has high accuracy and strong anti-interference ability.

[0111] In the present invention, the installation method of the sensing element 3131 on the liquid storage container 310 is not limited, as long as it moves with the liquid level during the liquid level rise and is sensed by the detection element when it reaches the set position. Fig.12 In an embodiment of the cleaning base station 10 of the present invention, the sensing member 3131 has a rotating end 3132 and a sensing end 3133. The rotating end 3132 is rotatably connected to the liquid storage container 310, and the sensing end 3133 rotates around the rotation axis of the rotating end 3132 to form a movement in the height direction. The detection element includes a magnetic member 3134 and a Hall sensor. The magnetic member 3134 is arranged at the sensing end 3133. The Hall sensor is arranged in the base station body 100 and corresponds to the magnetic member 3134. Since the Hall sensor itself does not directly contact the liquid, this greatly reduces the risk of corrosion of the sensor components by the liquid medium, thereby extending the service life of the liquid level meter.

[0112] In an embodiment of the cleaning base station 10 of the present invention, the sensing element 3131 has a highest sensing position, which is the highest liquid level that can be sensed by the sensing element 3131, and the liquid storage container 310 has a highest capacity surface, which is the liquid level corresponding to the maximum liquid that can be stored in the liquid storage container 310 without liquid overflowing, and the volume between the highest sensing position and the highest capacity surface is greater than or equal to the volume of the cleaning tank 120. In this way, during the sewage extraction process, when the sensing end 3133 of the liquid level detection device 313 is about to reach the highest sensing position but is not triggered, the sewage generated by the single cleaning and washing component in the cleaning tank 120 still needs to be sucked into the liquid storage container 310, and the volume between the highest sensing position and the highest capacity surface is greater than or equal to the volume of the cleaning tank 120, which can ensure that the liquid storage container 310 still has enough space to accommodate the sewage generated by the single cleaning and washing component in the cleaning tank 120, thereby preventing the sewage from overflowing from the liquid storage container 310. After the sewage enters the liquid storage container 310, the liquid level of the sewage is higher than the highest sensing position of the sensing end 3133 of the liquid level detection device 313. The liquid level detection device 313 performs signal feedback to issue a full liquid alarm to remind the user to dump the sewage after the sewage is pumped out.

[0113] In an embodiment of the cleaning base station 10 of the present invention, the volume between the highest sensing position and the highest capacity surface is greater than or equal to the liquid volume of the sewage generated in the cleaning tank 120 when the cleaning base station 10 cleans the cleaning component once. It should be noted that a single time includes the entire process from the start of cleaning of the cleaning component to the completion of cleaning of the cleaning component.

[0114] Although the present invention can also use the dumping method to discharge the sewage in the liquid storage container 310, in an embodiment of the cleaning base station 10 of the present invention, the cleaning base station 10 also includes a sewer pipe (not shown), one end of which is connected to the bottom of the liquid storage container 310, and the other end of the sewer pipe is a free end, and a valve component (not shown) is provided on the sewer pipe. When the liquid storage container 310 is full, the free end of the sewer pipe is inserted into the floor drain, and the sewer pipe is opened by opening the valve component, and the sewage in the liquid storage container 310 is directly discharged into the floor drain. This arrangement reduces the burden of manual dumping and also provides a good platform for automatic sewage discharge.

[0115] Considering that the sewage of the cleaning base station 10 is corrosive to a certain extent, in an embodiment of the cleaning base station 10 of the present invention, the liquid inlet pipe 500 is a rigid corrosion-resistant pipe, which is fixed on the base station body 100, and the on-off assembly 600 is an electric valve, which includes a control unit 620 and a valve body 610, and the valve body 610 is directly installed on the corrosion-resistant liquid inlet pipe 500, and the control unit 620 is rigidly connected to the valve body 610, and the control unit 620 and the valve body 610 are not connected to the base station body 100. In another embodiment, the on-off assembly 600 can also be installed only on the base station body 100, or some components are installed on the base station body 100, and some components are installed on the liquid inlet pipe 500.

[0116] In the cleaning base station 10 of the present invention, the on-off component 600 may be a manual valve, and the control unit 620 may not necessarily be included. In order to facilitate the needs of automatic control, please refer to Figures 7 to 11 In some embodiments of the cleaning base station 10 of the present invention, the on-off assembly 600 includes a control unit 620 and a valve body 610, the valve body 610 is installed on the liquid inlet pipeline 500, the control unit 620 is installed on the liquid inlet pipeline 500 and / or the base station body 100, and is electrically connected to the controller 700, so as to control the valve body 610 to open and block the liquid inlet pipeline 500. This arrangement can realize the automatic control inside the on-off assembly 600, and can improve the operating efficiency and accuracy of the cleaning base station 10. There is no need for manual operation of the valve body 610, which reduces the possibility of human error.

[0117] Although the control unit 620 can be manually controlled to achieve the control of the valve body 610, please refer to Figure 2 However, in one embodiment of the cleaning base station 10 of the present invention, the cleaning base station 10 also includes a controller 700, and the controller 700 is electrically connected to the control unit 620, and the control unit 620 in the on-off component 600 can be automatically controlled by the controller 700. The controller 700 is arranged in this way to automatically adjust the valve according to a preset program or real-time feedback to achieve intelligent control, which is of great significance for improving the intelligence level and user experience of the cleaning base station 10. At the same time, the electrically connected controller 700 is easy to integrate with other automation systems or monitoring systems of the cleaning base station 10, which provides convenience for the expansion and upgrading of the system. It should be noted that the way in which the controller 700 controls the opening and closing of the valve body 610 through the control unit 620 can participate in the conventional control method in the automatic field, which will not be repeated here.

[0118] The arrangement of the liquid inlet pipe 500 in the present invention is not limited. Those skilled in the art can understand that as long as the on-off assembly 600 is provided on the liquid inlet pipe 500, the liquid storage container 310 can be closed relative to the cleaning tank 120, and a negative pressure of a set threshold value can be formed in the liquid storage container 310, and a greater suction force can be obtained compared with the original state in which the liquid storage container 310 is directly connected to the cleaning tank 120 without the on-off assembly 600. However, in order to prevent dirt from remaining in the liquid inlet pipe 500 and to reduce pressure loss, please refer to Figure 2 and Fig. 9 In an embodiment of the cleaning base station 10 of the present invention, the liquid inlet pipeline 500 includes a straight pipe section 510 extending in a straight line, and the valve body 610 is installed on the straight pipe section 510. By arranging the valve body 610 on the straight pipe section 510, not only the sewage extraction efficiency and system stability are improved, but also the residual sewage and pressure loss at the valve body 610 are reduced, making the operation of the entire cleaning base station 10 more efficient, reliable and economical.

[0119] See also Figure 2 , Figure 4 and Fig. 9 In an embodiment of the cleaning base station 10 of the present invention, the liquid storage container 310 is arranged on the top of the base station body 100, and the straight pipe section 510 is arranged in the vertical direction. The upper end of the straight pipe section 510 is connected to the sewage joint 311 in the liquid storage container 310, and the lower end of the straight pipe section 510 is connected to the bottom of the cleaning tank 120. This arrangement can reduce the length of the inclined pipe section and the horizontal pipe section, and can prevent the blockage caused by the sedimentation of dirt on the inner wall of the liquid inlet pipe 500 under the action of gravity.

[0120] In the present invention, the straight pipe section 510 can be an integral section or can be formed by connecting multiple pipe sections, depending on the structure and installation method of the valve body 610. Figure 7 In an embodiment of the cleaning base station 10 of the present invention, the liquid inlet pipe 500 includes a first straight pipe section 511 and a second straight pipe section 512. In the second state, the valve body 610 includes a flow channel that runs through in a straight line, one end of the flow channel is connected to the first straight pipe section 511, and the other end of the flow channel is connected to the second straight pipe section 512. The first straight pipe section 511, the flow channel, and the second straight pipe section 512 are connected to each other to form a sewage channel extending in a vertical straight line. This arrangement can reduce the resistance of the valve body 610, reduce the energy loss of sewage passing through the valve body 610 during the suction process, and prevent dirt from clogging the flow channel of the valve body 610.

[0121] In the present invention, the material of the first straight pipe section 511 and the second straight pipe section 512 can be set according to the installation requirements of the valve body 610. In an embodiment of the cleaning base station 10 of the present invention, the first straight pipe section 511 and the second straight pipe section 512 are both hard pipes, and the two ends of the on-off assembly 600 are respectively sealed and connected to the first straight pipe section 511 and the second straight pipe section 512 through quick-connect connectors. The form of the quick-connect connector can refer to the common quick-connect connector form in the hydraulic field, and can be obtained through general commercial means, which will not be repeated here. It should be noted that if the speed of connection is not considered, the first straight pipe section 511 and the second straight pipe section 512 can also be connected to the valve body 610 through other detachable connection methods such as flanges, and examples will not be given one by one.

[0122] See also Figures 8 to 11 In an embodiment of the cleaning base station 10 of the present invention, the liquid inlet pipeline 500 includes a flexible pipe section 513, the valve body 610 of the on-off assembly 600 is a pinch valve, the pinch valve is installed on the flexible pipe section 513, the control unit 620 is installed on the liquid inlet pipeline 500 and / or the base station body 100, and the control unit 620 controls the pinch valve to clamp and block the flexible pipe section 513 in the first state, and to release the flexible pipe section 513 in the second state. The pinch valve can be any one of a pneumatic pinch valve, a hydraulic pinch valve, an electromagnetic pinch valve, and an electric pinch valve, but is not limited thereto, as long as it is installed on the flexible pipe section 513 and can clamp the flexible pipe section 513 to interrupt the liquid inlet pipeline 500. The flexible pipe section 513 is provided, and the flexible pipe section 513 is clamped and blocked by the pinch valve, so that the sewage does not pass through the internal flow channel of the valve body 610, does not cause corrosion and damage to the valve body 610, and can increase the service life of the valve body 610.

[0123] The material and specific size of the flexible pipe section 513 in the present invention are suitable to meet the needs of sewage extraction and facilitate the clamping valve to clamp and block the passage of the liquid inlet pipe 500. In one embodiment, the flexible pipe section 513 is a silicone tube, the hardness of the silicone tube is 60° to 80°, for example, it can be any value between 60°, 70°, 80°, etc., the inner diameter is φ18mm to φ22mm, for example, it can be any value between φ18mm and φ22mm, such as φ18mm, φ20mm, φ22mm, etc., and the wall thickness is 1mm to 2mm. Such material selection and size range selection can not only make the flexible pipe section 513 have good corrosion resistance and aging resistance, but also have good elasticity, easy to achieve clamping under the action of the clamping valve, and elastically restore deformation after the clamping valve is released.

[0124] See also Fig. 9In an embodiment of the cleaning base station 10 of the present invention, the pinch valve is a pneumatic pinch valve, which includes a first interface 611 for air intake and air release, and relies on the air intake and air release of the first interface 611 to control the closing and opening of the pneumatic pinch valve. The control unit 620 also includes a pressure limiting valve 623, a control valve 624 and an air release valve 621. The controller 700 of the cleaning base station 10 is electrically connected to the control valve 624, the air release valve 621, and the first negative pressure device 400, respectively, to control the opening and closing of the control valve 624, the air release valve 621 and the first negative pressure device 400. The air inlet of the pressure limiting valve 623, the first air outlet valve port 6242, and the air inlet of the air release valve 621 are all connected to the first interface 611 through a pipe joint 622 (a four-way pipe joint); the exhaust port of the pressure limiting valve 623, the second air outlet valve port of the control valve 624, and the exhaust port of the air release valve 621 are connected to the external atmospheric environment. The pressure limiting valve 623 can prevent the internal pressure of the pneumatic pinch valve from being too high. When it is necessary to perform sewage extraction operation on the cleaning tank 120, the controller 700 controls the venting valve 621 for deflation to be closed, and controls the control valve 624 to connect the exhaust port of the first negative pressure device 400 with the first interface 611 through the pipe joint 622, and turns on the first negative pressure device 400. While the first negative pressure device 400 extracts air from the liquid storage container 310, it inflates the pneumatic pinch valve and closes the pneumatic pinch valve. At this time, the switch control valve 624 connects the first negative pressure device 400 to the atmosphere, and when the liquid storage container 310 is pumped until the negative pressure reaches the set threshold, the first negative pressure device 400 is closed, and the venting valve 621 is opened to deflate the pneumatic pinch valve. The pneumatic pinch valve pumps the sewage in the cleaning tank 120 into the liquid storage container 310 while opening the liquid inlet pipe 500. In this solution, the pneumatic pinch valve can be protected by the pressure-limiting valve 623, and the action switching of the first negative pressure device 400 at various stages can be realized by the on-off control of the control valve 624. After the pneumatic pinch valve is closed, the exhaust port of the first negative pressure device 400 can be directly connected to the atmosphere through the switching of the control valve 624, which can reduce the pulsating impact on the pneumatic pinch valve during the exhaust of the first negative pressure device 400 to the atmosphere.

[0125] See also Fig.10 In an embodiment of the cleaning base station 10 of the present invention, the pneumatic pinch valve includes a first interface 611 for air intake and air discharge, and Fig. 9Different from the scheme in the embodiment, the control unit 620 does not include a control valve 624, but only includes a pressure limiting valve 623 and an air release valve 621 for releasing air. The exhaust port of the first negative pressure device 400, the air inlet of the pressure limiting valve 623, and the air inlet of the air release valve 621 are all connected to the first interface 611 through a pipe joint 622 (a four-way pipe joint 622); the exhaust port of the pressure limiting valve 623 and the exhaust port of the air release valve 621 are all connected to the external atmospheric environment. When it is necessary to perform sewage extraction operation on the cleaning tank 120, the first negative pressure device 400 works, provides closing air pressure for the pneumatic clamp valve, and performs air extraction operation on the liquid storage container 310. After the pneumatic clamp valve is closed and the negative pressure inside the liquid storage container 310 reaches the set threshold, the first negative pressure device 400 is closed, and then the air release valve 621 is controlled to open to release the pneumatic clamp valve. When the pneumatic clamp valve is opened, the sewage in the cleaning tank 120 is extracted into the liquid storage container 310. In this solution, the first negative pressure device 400 and the pneumatic pinch valve are controlled to release air to the atmosphere through the air release valve 621. Fig. 9 The solution in simplifies the circuit and can save costs.

[0126] See also Fig.11 In an embodiment of the cleaning base station 10 of the present invention, the pinch valve is a pneumatic pinch valve. Fig. 9 , Fig.10 Different from the scheme in the embodiment, the control unit 620 includes a second negative pressure device 625 that independently drives the pneumatic pinch valve. The second negative pressure device 625 is installed on the base station body 100, and the exhaust port of the second negative pressure device 625 and the air inlet of the air release valve 621 are connected to the first interface 611 of the pneumatic pinch valve through the pipe joint 622 (three-way pipe joint 622). The air extraction port of the second negative pressure device 625 and the exhaust port of the air release valve 621 are both connected to the external atmospheric environment. The second negative pressure device 625 drives the pneumatic pinch valve to clamp and block the flexible pipe section 513. When it is necessary to perform sewage extraction operation on the cleaning tank 120, the second negative pressure device 625 works, provides sufficient closing air pressure for the pneumatic pinch valve, and then stops working. After the second negative pressure device 625 stops working, the first negative pressure device 400 starts working, and after the liquid storage container 310 is pumped until the negative pressure reaches the set threshold, the first negative pressure device 400 stops working. The air release valve 621 is opened to release the air from the pneumatic pinch valve. When the pneumatic pinch valve is opened, the sewage in the cleaning tank 120 is pumped into the liquid storage container 310. In this solution, a second negative pressure device 625 is provided to independently supply air to the pneumatic pinch valve. The opening and closing of the pneumatic pinch valve will not be affected by the action of the first negative pressure device 400. The pneumatic pinch valve can be turned off before the first negative pressure device 400 performs the air extraction operation on the liquid storage container 310, which can speed up the formation of negative pressure in the liquid storage container 310. In addition, the air release valve 621 is provided in this solution. The controller 700 of the cleaning base station 10 can control the opening and closing of the air release valve 621 to achieve the pressure relief of the pneumatic pinch valve. Compared with the structure of manually relieving the pressure of the pneumatic pinch valve, the degree of automation is higher.

[0127] The present invention also provides a cleaning system, which includes a self-moving cleaning device and a cleaning base station 10 as described in any one of the above items. The cleaning base station 10 performs cleaning operations for the cleaning components of the cleaning device. The self-moving cleaning device is configured to walk on the floor to complete the corresponding cleaning operations. In actual application, the self-moving cleaning device can be specifically manifested as products such as a sweeper, a mop, and a sweeper and mop all-in-one machine. In order to exert its necessary cleaning function, the self-moving cleaning device at least includes a cleaning component, for example, a rag, a roller brush, etc. In order to realize the working needs of the cleaning component, conventional structures such as a spray component, a clean water tank, a battery, and a walking drive system can also be included. The self-moving cleaning device can also integrate various other functions of existing self-moving cleaning equipment according to actual needs, including but not limited to autonomous itinerary planning functions based on sensors such as accelerometers, gyroscopes, and odometers, obstacle recognition and collision avoidance functions based on distance sensors, image recognition devices, etc., autonomous walking functions based on mechanical mechanisms such as driving wheel groups, driven wheel groups and drivers, human-computer interaction functions based on physical buttons, virtual cases, display screens and indicator lights, energy supply functions based on rechargeable batteries, etc., and intelligent control functions based on control circuits or control chips, etc., without going into details one by one.

[0128] The liquid pumping system of the present invention can realize the cutting off of the liquid inlet pipeline by setting a switch component corresponding to the liquid inlet pipeline, so that a closed space is formed inside the liquid storage container. In this way, a large negative pressure can be formed in the liquid storage container under the action of the first negative pressure device, thereby reducing the number of suctions compared to the suction operation mode of sucking dirt while pumping air, and can set the negative pressure threshold in the liquid storage container according to the volume of the cleaning tank, so that all the sewage in the cleaning tank can be sucked into the liquid storage container at one time. It can effectively improve the speed of sewage pumping and reduce the time used for sewage pumping. Because the number of suctions is reduced, the number of times the gas and sewage are combined is reduced, and the bubble sound can be reduced at the same time; in addition, compared with the suction operation mode of sucking dirt while pumping air, the cleaning base station of the present invention can obtain a greater suction force, increase the carrying rate of deposited impurities in the cleaning tank, reduce the dirt deposition at the bottom of the cleaning tank, and is conducive to achieving complete maintenance-free cleaning tank.

[0129] In summary, the present invention effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance. The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A method for controlling the extraction of sewage from a cleaning base station, the cleaning base station comprising a base station body, a cleaning tank being provided at the bottom of the base station body, the cleaning tank being used to collect sewage generated when the cleaning base station cleans a cleaning component of a self-cleaning device, a liquid storage container being provided on the base station body, the liquid storage container being used to collect sewage in the cleaning tank, characterized in that: The sewage extraction control method comprises the following steps: closing the sewage extraction channel between the cleaning tank and the liquid storage container; Performing a vacuum operation on the liquid storage container until the negative pressure of the liquid storage container reaches a set threshold; Opening the sewage extraction channel between the cleaning tank and the liquid storage container; The sewage in the cleaning tank is sucked into the liquid storage container under the action of negative pressure.

2. The method for controlling the extraction of pollutants from a cleaning base station according to claim 1, characterized in that: The control method further comprises triggering a full liquid prompt when the liquid level in the liquid storage container reaches a first preset height.

3. The method for controlling the extraction of pollutants from a cleaning base station according to claim 2, characterized in that: An anti-overflow area is provided between the first preset height and the liquid level height corresponding to the maximum capacity of the liquid storage container, and the volume of the anti-overflow area is greater than or equal to the volume of the cleaning tank.

4. The method for controlling the extraction of pollutants from a cleaning base station according to claim 3, characterized in that: The volume of the anti-overflow area is greater than or equal to the volume of liquid generated in the cleaning tank when the cleaning base station cleans the cleaning component once.

5. The method for controlling the extraction of pollutants from a cleaning base station according to claim 2 or 3, characterized in that: Whether the liquid level in the liquid storage container reaches a first preset height is determined by detecting the liquid level in the liquid storage container, detecting the weight of the liquid storage container, or detecting the number of times the sewage extraction channel is opened and closed.

6. The method for controlling the extraction of pollutants from a cleaning base station according to claim 2 or 3, characterized in that: The control method also includes, when the liquid level in the liquid storage container reaches a second preset height, sucking the sewage generated by a single cleaning of the cleaning component in the cleaning tank into the liquid storage container under the action of negative pressure, wherein the second preset height is smaller than the first preset height, and the volume of the area between the second preset height and the first preset height is smaller than the volume of the cleaning tank.

7. The method for controlling the extraction of pollutants from a cleaning base station according to claim 6, characterized in that: The volume of the area between the second preset height and the first preset height is smaller than the volume of liquid generated in the cleaning tank when the cleaning base station performs a single cleaning operation on the cleaning component.

8. The method for controlling the extraction of pollutants from a cleaning base station according to claim 1, characterized in that: The set threshold is positively correlated with the amount of sewage generated by the cleaning base station in the cleaning tank when cleaning the cleaning component once.

9. A liquid pumping system, characterized in that: The sewage pumping control method of claim 1 is used to pump out the sewage in the cleaning tank, and the pumping system includes: liquid storage container; A liquid inlet pipeline, the liquid inlet pipeline is connected to the liquid storage container; a first negative pressure device, wherein the air extraction port of the first negative pressure device is connected to the liquid storage container; an on-off assembly, arranged corresponding to the liquid inlet pipeline, the on-off assembly having a first state of blocking the liquid inlet pipeline and a second state of connecting the liquid inlet pipeline; Among them, the on-off component is switched to the first state, the first negative pressure device evacuates the liquid storage container to make the negative pressure in the liquid storage container reach a set threshold value, and when the negative pressure in the liquid storage container is maintained at the set threshold value, the on-off component is switched to the second state, and the negative pressure of the liquid storage container causes external liquid to enter the liquid storage container through the liquid inlet pipe.

10. The liquid pumping system according to claim 9, characterized in that: The on-off assembly includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core has an extruded state and an open state. When the valve core is in the extruded state, the on-off assembly is in a first state, and when the valve core is in an open state, the on-off assembly is in a second state.

11. The liquid pumping system according to claim 10, characterized in that: The pipeline on-off valve is a pneumatic pinch valve, and the liquid pumping system also includes a second negative pressure device, the exhaust port of the second negative pressure device is connected to the air inlet of the pneumatic pinch valve, and the gas discharged by the second negative pressure device drives the valve core to a squeezed state.

12. The liquid pumping system according to claim 10, characterized in that: The pipeline on-off valve is a pneumatic pinch valve, the air inlet of the pneumatic pinch valve is connected to the exhaust port of the first negative pressure device, and at least part of the gas discharged by the first negative pressure device drives the valve core to a squeezed state.

13. The liquid extraction system according to claim 12, characterized in that: The on-off assembly also includes a control valve, which includes an air inlet valve port, a first air outlet valve port, and a second air outlet valve port. The exhaust port of the first negative pressure device is connected to the air inlet valve port, the first air outlet valve port is connected to the air inlet of the pneumatic pinch valve, and the second air outlet valve port is connected to the atmosphere.

14. The liquid pumping system according to claim 13, characterized in that: The control valve is a two-position three-way solenoid valve.

15. The liquid extraction system according to claim 11, 12 or 13, characterized in that: The on-off assembly further comprises a pressure-limiting valve, which comprises a gas inlet and a gas outlet. The gas inlet is connected to the gas outlet of the pneumatic pinch valve, and the gas outlet is connected to the atmosphere.

16. The liquid extraction system according to claim 11, 12 or 13, characterized in that: The on-off assembly also includes an air release valve, which includes an air inlet interface and an air outlet interface. The air inlet interface is connected to the air outlet of the pneumatic pinch valve, and the air outlet interface is connected to the atmosphere.

17. The liquid extraction system according to claim 9, characterized in that: The on-off assembly includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core is rotatably arranged in the valve body, the valve body has a valve body flow channel, and the valve core has a valve core flow channel. When the non-valve core flow channel portion of the valve core corresponds to the valve body flow channel, the on-off assembly is in a first state, and when the valve core flow channel of the valve core corresponds to the valve body flow channel, the on-off assembly is in a second state.

18. The liquid extraction system according to claim 17, characterized in that: The pipeline on-off valve is an electric ball valve.

19. The liquid pumping system according to claim 9, characterized in that: The on-off assembly includes a pipeline on-off valve, which includes a valve body and a valve core. The valve core is movably arranged in the valve body. The valve body has a valve body flow channel. The valve core has a first position and a second position. When the valve core is in the first position, the on-off assembly is in a first state. When the valve core is in the second position, the on-off assembly is in a second state.

20. The liquid extraction system according to claim 19, characterized in that: The pipeline on-off valve is any one of a butterfly valve, a gate valve and an electromagnetic pinch valve.

21. The liquid extraction system according to claim 11 or 12, characterized in that: The liquid inlet pipeline comprises a hard pipe section and a flexible pipe section, and the flexible pipe section passes through the valve core of the pneumatic pinch valve.

22. The liquid extraction system according to claim 19, characterized in that: The pipeline on-off valve is an electromagnetic pinch valve, and the liquid inlet pipeline includes a hard pipe section and a flexible pipe section, and the flexible pipe section passes through the moving path of the valve core of the electromagnetic pinch valve.

23. The liquid extraction system according to claim 9, characterized in that: The liquid inlet pipeline includes a straight pipe section extending in a straight line, and the on-off assembly is arranged corresponding to the straight pipe section of the liquid inlet pipeline.

24. The liquid extraction system according to claim 23, characterized in that: The straight pipe section includes a first straight pipe section and a second straight pipe section, an interface at one end of the on-off assembly is connected to the first straight pipe section, and an interface at the other end of the on-off assembly is connected to the second straight pipe section.

25. The liquid extraction system according to claim 9, characterized in that: The time for the on-off component to switch from the first state to the second state is between 0.3s and 1s.

26. The liquid extraction system according to claim 9, characterized in that: The liquid pumping system also includes a pressure relief valve, which is arranged in the liquid storage container. When the negative pressure value in the liquid storage container is greater than the set threshold value, the pressure relief valve opens to connect the inner cavity of the liquid storage container with the outside air. When the negative pressure value in the liquid storage container is less than or equal to the set threshold value, the pressure relief valve closes to seal the liquid storage container.

27. The liquid extraction system according to claim 26, characterized in that: The pressure relief valve includes a pressure relief chamber, a sealing plate and an elastic member. One end of the pressure relief chamber is connected to the inner cavity of the liquid storage container, and the other end is provided with a pressure relief port connected to the outside atmosphere. One end of the elastic member is installed on the wall of the pressure relief chamber, and the other end presses the sealing plate tightly to seal the pressure relief port.

28. The liquid extraction system according to claim 27, characterized in that: A guide rod is provided on the wall of the pressure relief chamber, and the blocking plate is slidably matched with the guide rod.

29. The liquid extraction system according to claim 28, characterized in that The blocking plate is provided with a sliding block on one side facing the guide rod, the sliding block is provided with a sliding groove on one side facing the guide rod, and the end of the guide rod slides in the sliding groove; or, the blocking plate is provided with a sliding block on one side facing the guide rod, the guide rod is provided with a sliding groove on one side facing the blocking plate, and the sliding block slides in the sliding groove.

30. The liquid extraction system according to claim 27, characterized in that: A sealing member is provided on a side of the blocking plate facing away from the elastic member, and a projection of the pressure relief port on the blocking plate is located within a region enclosed by the sealing member.

31. A cleaning base station, characterized in that: It comprises a base station body and a liquid pumping system as described in any one of claims 8-29, wherein a cleaning tank is arranged at the bottom of the base station body, the liquid pumping system is arranged in the base station body, and the end of the liquid inlet pipe away from the liquid storage container is connected to the cleaning tank.

32. The cleaning base station according to claim 31, characterized in that: The cleaning base station also includes a liquid level detection device, which includes a detection element and a sensing member. The detection element is used to sense the position of the sensing member. The sensing member can be movably arranged in the liquid storage container and rises as the liquid level in the liquid storage container rises; or, after the liquid level in the liquid storage container reaches a preset height, continues to rise as the liquid level rises.

33. The cleaning base station according to claim 32, characterized in that: The sensing component comprises a rotating end and a sensing end. The rotating end is rotatably connected in the liquid storage container. The sensing end rotates around the rotating axis of the rotating end to form movement in the height direction.

34. The cleaning base station according to claim 33, characterized in that: The detection element includes a magnetic component and a Hall sensor. The magnetic component is arranged at the sensing end, and the Hall sensor is arranged in the base station body and corresponds to the magnetic component.

35. The cleaning base station according to claim 32, characterized in that: The sensing element has a maximum sensing position, which is the highest liquid level that the sensing element can sense. The liquid storage container has a maximum capacity surface, which is the liquid level corresponding to the maximum amount of liquid that the liquid storage container can store without overflowing. The volume between the maximum sensing position and the maximum capacity surface is greater than or equal to the volume of the cleaning tank.

36. The cleaning base station according to claim 35, characterized in that: The volume between the highest sensing position and the highest capacity surface is greater than or equal to the volume of liquid generated in the cleaning tank when the cleaning base station performs a single cleaning operation on the cleaning component.

37. The cleaning base station according to claim 31, characterized in that: The cleaning base station also includes a water sewer pipe, one end of which is connected to the liquid storage container and the other end is a free end. A valve component is provided on the water sewer pipe.

38. A cleaning system, characterized in that: The invention comprises a self-moving cleaning device and a cleaning base station as claimed in any one of claims 31 to 36.

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