Liquid suctioning system, cleaning base station comprising liquid suctioning system, and cleaning system

Abstract

A liquid suctioning system (300), a cleaning base station (10) comprising the liquid suctioning system (300), and a cleaning system. The liquid suctioning system (300) comprises: a liquid storage container (310), a liquid inlet pipe (500), a first negative pressure device (400), and an open / close assembly (600); the liquid inlet pipe (500) is connected to the liquid storage container (310); an air extraction port of the first negative pressure device (400) is communicated with the liquid storage container (310); the open / close assembly (600) is arranged corresponding to the liquid inlet pipe (500); the open / close assembly (600) has a first state in which the liquid inlet pipe (500) is closed and a second state in which the liquid inlet pipe (500) is open; when the open / close assembly (600) is switched to the first state, the first negative pressure device (400) evacuates the liquid storage container (310) such that a negative pressure within the liquid storage container (310) reaches a set threshold; and when the negative pressure within the liquid storage container (310) is maintained at the set threshold, the open / close assembly is switched to the second state, such that the negative pressure within the liquid storage container (310) causes external liquid to enter the liquid storage container (310) through the liquid inlet pipe (500). The liquid suctioning system (300) can solve the technical problem in existing liquid suction systems that, during the suction of wastewater from a wastewater tank, bubble noise is significant and lasts for a long time.

Description

A liquid extraction system and a cleaning base station and cleaning system including the liquid extraction system.

[0001] Cross-reference of related applications

[0002] This application claims the benefit of Chinese Patent Application No. 202423228134.7, filed on December 26, 2024, the contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of cleaning equipment, and more specifically to a liquid extraction system and a cleaning base station and cleaning system including the liquid extraction system. Background Technology

[0004] As a component of cleaning equipment, the cleaning base station typically requires cleaning of the equipment's cleaning components. During cleaning, wastewater accumulates in the cleaning tank at the bottom of the base station. A pumping system is needed to extract the wastewater into a storage container within the system. Existing pumping systems on cleaning base stations typically pump wastewater from the tank by simultaneously applying negative pressure to the storage container and using that negative pressure to draw wastewater through a straight pipe. This results in noticeable and prolonged bubbling noise during the pumping process, negatively impacting the customer experience. Therefore, a pumping system and a cleaning base station and cleaning system incorporating this system are needed to address these issues. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a liquid extraction system and a cleaning base station and a cleaning system including the liquid extraction system, so as to improve the technical problem that the sound of bubbles is obvious and lasts for a long time during the process of pumping sewage in the sewage tank in the cleaning base station.

[0006] To achieve the above and other related objectives, the present invention provides a liquid extraction system, comprising: a liquid storage container, a liquid inlet pipe, a first negative pressure device, and a switching component; the liquid inlet pipe is connected to the liquid storage container; the suction port of the first negative pressure device is connected to the liquid storage container; the switching component is disposed corresponding to the liquid inlet pipe, and the switching component has a first state of blocking the liquid inlet pipe and a second state of connecting the liquid inlet pipe; wherein, when the switching 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; when the negative pressure in the liquid storage container is maintained at the set threshold, the switching component is switched to the second state, and the negative pressure in the liquid storage container allows external liquid to enter the liquid storage container through the liquid inlet pipe.

[0007] In one embodiment of the liquid extraction system of the present invention, the on / off component includes a pipeline on / off valve, the pipeline on / off valve includes a valve body and a valve core, the valve core has a squeezed state and an open state, when the valve core is in the squeezed state, the on / off component is in a first state, and when the valve core is in the open state, the on / off component is in a second state.

[0008] In one embodiment of the liquid extraction system of the present invention, the pipeline on / off valve is a pneumatic pinch valve, and the liquid extraction system further 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.

[0009] In one embodiment of the liquid extraction 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.

[0010] In one embodiment of the liquid extraction system of the present invention, the on / off component further includes a control valve, the control valve including an inlet valve, a first outlet valve, and a second outlet valve, the exhaust port of the first negative pressure device is connected to the inlet valve, the first outlet valve is connected to the inlet of the pneumatic clamp valve, and the second outlet valve is connected to the atmosphere.

[0011] In one embodiment of the liquid extraction system of the present invention, the control valve is a two-position three-way solenoid valve.

[0012] In one embodiment of the liquid extraction system of the present invention, the on / off component further includes a pressure limiting valve, the pressure limiting valve 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.

[0013] In one embodiment of the liquid extraction system of the present invention, the on / off component further includes a venting valve, the venting valve includes an air inlet and an air outlet, the air inlet is connected to the air outlet of the pneumatic clamp valve, and the air outlet is connected to the atmosphere.

[0014] In one embodiment of the liquid extraction system of the present invention, the on / off component includes a pipeline on / off valve, the pipeline on / off valve includes a valve body and a valve core, the valve core is rotatably disposed 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 component 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 component is in a second state.

[0015] In one embodiment of the liquid extraction system of the present invention, the pipeline on / off valve is an electric ball valve.

[0016] In one embodiment of the liquid extraction system of the present invention, the on / off component includes a pipeline on / off valve, the pipeline on / off valve includes a valve body and a valve core, the valve core is movably disposed in the valve body, the valve body has a valve body flow channel, and 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.

[0017] In one embodiment of the liquid extraction system of the present invention, the pipeline on / off valve is any one of a butterfly valve, a gate valve, or an electromagnetic clamp valve.

[0018] In one embodiment of the liquid extraction system of the present invention, the liquid inlet pipe includes a rigid pipe section and a flexible pipe section, and the flexible pipe section passes through the valve core of the pneumatic clamp valve.

[0019] In one embodiment of the liquid extraction system of the present invention, the pipeline on / off valve is an electromagnetic clamp valve, and the liquid inlet pipeline includes a rigid pipe section and a flexible pipe section, wherein the flexible pipe section passes through the movement path of the valve core of the electromagnetic clamp valve.

[0020] In one embodiment of the liquid extraction system of the present invention, the liquid inlet pipe includes a straight pipe section extending in a straight line, and the on / off component is provided corresponding to the straight pipe section of the liquid inlet pipe.

[0021] In one embodiment of the liquid extraction 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.

[0022] In one embodiment of the liquid extraction system of the present invention, the time for the switching component to switch from the first state to the second state is between 0.3s and 1s.

[0023] In one embodiment of the liquid extraction system of the present invention, the liquid extraction system further includes a pressure relief valve, which is disposed in the liquid storage container. When the negative pressure value in the liquid storage container is greater than the set threshold, 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, the pressure relief valve closes to seal the liquid storage container.

[0024] In one embodiment of the liquid extraction system of the present invention, the pressure relief valve includes a pressure relief chamber, a sealing plate and an elastic element. 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 element is installed on the wall of the pressure relief chamber, and the other end presses the sealing plate against the pressure relief port to seal it.

[0025] In one embodiment of the liquid extraction system of the present invention, a guide rod is provided on the wall of the pressure relief chamber, and the sealing plate and the guide rod are in sliding engagement.

[0026] In one embodiment of the liquid extraction system of the present invention, the sealing plate is provided with a sliding block on the side facing the guide rod, and the sliding block is provided with a sliding groove on the side facing the guide rod, and the end of the guide rod slides in the sliding groove; or, the sealing plate is provided with a sliding block on the side facing the guide rod, and the guide rod is provided with a sliding groove on the side facing the sealing plate, and the sliding block slides in the sliding groove.

[0027] In one embodiment of the liquid extraction system of the present invention, the sealing plate is provided with a sealing element on the side opposite to the elastic element, and the projection of the pressure relief port on the sealing plate is located within the area enclosed by the sealing element.

[0028] The present invention also provides a clean base station, the clean base station including a base station body and any of the above-described liquid extraction systems, a cleaning tank is provided at the bottom of the base station body, the liquid extraction system is located inside the base station body, and the end of the liquid inlet pipe away from the liquid storage container is connected to the cleaning tank.

[0029] In one embodiment of the clean base station of the present invention, the clean base station further includes a liquid level detection device, the liquid level detection device includes a detection element and a sensing element, the detection element is used to sense the position of the sensing element, the sensing element is movably disposed 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.

[0030] In one embodiment of the clean base station of the present invention, the sensing element has a rotating end and a sensing end. The rotating end is rotatably connected inside the liquid storage container, and the sensing end rotates around the rotation axis of the rotating end to form a movement in the height direction.

[0031] In one embodiment of the clean base station of the present invention, the detection element includes a magnetic component and a Hall sensor. The magnetic component is disposed at the sensing end, and the Hall sensor is disposed inside the base station body and corresponds to the magnetic component.

[0032] In one embodiment of the cleaning base station of the present invention, the sensor has a highest sensing position, which is the highest liquid level height that the sensor can sense, the liquid storage container has a highest capacity surface, which is the liquid level height corresponding to the maximum amount of 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.

[0033] In one 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.

[0034] In one embodiment of the clean base station of the present invention, the clean base station further includes a drain pipe, one end of which is connected to the liquid storage container and the other end is a free end, and a valve component is provided on the drain pipe.

[0035] The present invention also provides a cleaning system, the cleaning system comprising a self-moving cleaning device and a cleaning base station as described in any of the above claims.

[0036] This invention's liquid extraction system, by incorporating on / off components corresponding to the inlet pipe, can cut off the inlet pipe, creating a sealed space inside the storage container. This, combined with the first negative pressure device, generates a significant negative pressure within the storage container. Compared to suction methods that simultaneously extract air and remove contaminants, this reduces the number of extractions. Furthermore, by adjusting the volume of the cleaning tank and setting a negative pressure threshold in the storage container, all wastewater in the cleaning tank can be extracted into the storage container in a single operation. This effectively increases the extraction speed and reduces the time required for wastewater extraction. The reduced number of extractions also decreases the frequency of gas-wastewater interaction, thus reducing bubbling noise. Additionally, compared to suction methods that simultaneously extract air and remove contaminants, this invention's cleaning station achieves greater suction force, increasing the carry-over rate of deposited impurities in the cleaning tank and reducing dirt buildup at the bottom, ultimately leading to a completely maintenance-free cleaning tank. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0038] Figure 1 is a three-dimensional schematic diagram of an embodiment of the clean base station of the present invention;

[0039] Figure 2 is a view of the internal structure exposed after removing part of the casing in an embodiment of the clean base station of the present invention;

[0040] Figure 3 is a schematic diagram of the liquid storage container in one embodiment of the clean base station of the present invention;

[0041] Figure 4 is a schematic diagram of the structure of the liquid storage container after the cover is removed in one embodiment of the clean base station of the present invention;

[0042] Figure 5 is a partial cross-sectional view of the pressure relief valve in one embodiment of the clean base station of the present invention;

[0043] Figure 6 is a three-dimensional view of the pressure relief cavity in one embodiment of the clean base station of the present invention;

[0044] Figure 7 is a schematic diagram of the water and gas connections in an embodiment of the clean base station of the present invention;

[0045] Figure 8 is a schematic diagram of the water and gas connections in another embodiment of the clean base station of the present invention;

[0046] Figure 9 is a schematic diagram of the water and gas connections in another embodiment of the clean base station of the present invention;

[0047] Figure 10 is a schematic diagram of the water and gas connections in another embodiment of the clean base station of the present invention;

[0048] Figure 11 is a schematic diagram of the water and gas connections in another embodiment of the clean base station of the present invention;

[0049] Figure 12 is a schematic diagram of the installation of the liquid level detection device in the liquid storage container in another embodiment of the clean base station of the present invention.

[0050] Explanation of reference numerals in the attached drawings: 10. Cleaning base station; 100. Base station body; 110. Receiving cavity; 120. Cleaning tank; 300. Liquid extraction system; 310. Liquid storage container; 314. Box body; 311. Sewage connector; 312. Air extraction port; 313. Liquid level detection device; 3131. Sensing element; 3132. Rotating end; 3133. Sensing 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. Sealing plate; 334. Elastic element; 335. Pressure relief port; 336. Baffle plate; 3361. Second through hole; 337. Sliding block; 338. Guide. 339. Rod; 400. Sliding groove; 500. First negative pressure device; 510. Liquid inlet pipe; 511. Straight pipe section; 512. First straight pipe section; 513. Second straight pipe section; 514. Flexible pipe section; 600. On / off assembly; 610. Valve body; 611. First interface; 620. Control unit; 621. Vent valve; 6211. Inlet port; 6212. Outlet port; 622. Pipe joint; 623. Pressure limiting valve; 6231. Gas inlet; 6232. Gas outlet; 624. Control valve; 6241. Inlet valve port; 6242. First outlet valve port; 6243. Second outlet valve port; 625. Second negative pressure device; 700. Controller. Detailed Implementation

[0051] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes and not for limiting the scope of protection of the present invention. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0052] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the present invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0053] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as part of the scope of the invention.

[0054] Please refer to Figures 1 to 12. This invention provides a liquid extraction system 300, a cleaning base station 10 including the liquid extraction system 300, and a cleaning system. The liquid extraction system 300 can be applied not only to the cleaning base station 10 for pumping and storing wastewater in the cleaning tank 120, but also to any suitable liquid extraction equipment, such as aquarium water changing devices, dishwashers, cleaning base stations 10, and other equipment that requires liquid extraction operations. However, for ease of explanation, the following description uses the cleaning base station 10 as an example.

[0055] Please refer to Figures 1 and 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 shape of the base station body 100 is not limited. For example, it can be generally rectangular in shape, or the lower part can be rectangular and the top can be spherical, but this is not a limitation. Considering the needs of indoor placement, it is preferable to be aesthetically pleasing and small in size. The base station body 100 typically includes a receiving cavity 110, which is located at the bottom of the base station body 100 and has an opening for the cleaning equipment to enter. The receiving cavity 110 is also typically provided with a charging terminal that can be electrically connected to a charging device to charge the cleaning equipment. However, it should be noted that if charging is not considered, the base station body 100 of the present invention may not be provided with a charging terminal.

[0056] Please refer to Figures 1 and 2. The cleaning tank 120 is located 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 are not limited thereto. It is preferable that it can at least partially accommodate the cleaning components of the cleaning equipment in the height direction and clean the cleaning components. During the cleaning process of the cleaning components of the cleaning equipment, the cleaning tank 120 collects and stores wastewater to prevent wastewater from flowing out and polluting the indoor floor.

[0057] Referring to Figures 4 and 7, the liquid extraction system 300 includes: a liquid storage container 310, a liquid inlet pipe 500, a first negative pressure device 400, and an on / off assembly 600. The shape and structure of the liquid storage container 310 are not limited, provided it is easy to manufacture and has sufficient strength to prevent deformation when the negative pressure is increased 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 is connected to the liquid to be extracted, such as wastewater in the cleaning tank 120. The 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 capable of extracting gas, such as a vacuum pump, centrifugal fan, axial flow fan, plunger pump, etc., but is not limited thereto. The connection method between the air extraction port of the first negative pressure device 400 and the liquid storage container 310 is not limited. For example, an air extraction hole 312 can be formed by opening a hole in the wall above the highest liquid level of the liquid storage container 310, and the air extraction port of the first negative pressure device 400 can be directly connected to the air extraction hole 312. Alternatively, the air extraction port of the first negative pressure device 400 can be indirectly connected to the air extraction hole 312 through a pipe. The on / off component 600 is provided corresponding to the liquid inlet pipe 500. The on / off component 600 has a first state that blocks the liquid inlet pipe 500 and a second state that connects the liquid inlet pipe 500. When the on / off component 600 is switched to the first state, the first negative pressure device 400 evacuates the liquid storage container 310 so that the negative pressure in the liquid storage container 310 reaches a set threshold. When the negative pressure in the liquid storage container 310 is maintained at the set threshold, the on / off component 600 is switched to the second state. Under the action of the negative pressure in the liquid storage container 310, the sewage in the cleaning tank 120 is sucked into the liquid storage container 310 from the liquid inlet pipe 500. It should be noted that the threshold value can be calculated based on the volume of the liquid to be aspirated, the diameter of the inlet pipe 500, and the aspiration distance, or it can be obtained experimentally. Considering the diameter of the 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 30 kPa in this embodiment. Furthermore, it should be noted that, considering the existence of errors, slight fluctuations above or below the threshold value are considered "maintained," with slight fluctuations referring to ±10 kPa.

[0058] Please refer to Figures 2 to 4. In one embodiment of the liquid extraction system 300 of the present invention, the liquid storage container 310 is disposed on the base station body 100. The placement position can be set as needed to facilitate the dumping of sewage or the removal of the liquid storage container 310. In one 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 not limited, as long as it is easy to manufacture and has sufficient strength to prevent deformation when the negative pressure is drawn to a 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 extraction 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 for the purpose of dumping sewage, and for the convenience of... For cleaning, the liquid storage container 310 on the base station 10 includes a housing 314 and a cover 320 sealed and installed on the housing 314. As long as the cover 320 can reliably seal the sewage chamber inside the housing 314, the installation method of the cover 320 on the housing 314 is not limited. For example, the cover 320 can be completely separated from the housing 314 and fastened to the housing 314 by multiple sets of snap-fit ​​components. Alternatively, one side of the cover 320 can be rotatably connected to the housing 314, and the other side can be fastened to the housing 314 by snap-fit ​​components.

[0059] As long as the switching of the liquid inlet pipe 500 between the first and second states can be achieved, the type of the on / off component 600 in this invention is not limited. For example, the on / off component 600 can be any one or more of a manual valve, electric valve, solenoid valve, pneumatic pinch valve, and hydraulic pinch valve, but is not limited thereto. The on / off component 600 is installed on the liquid inlet pipe 500 and / or the corresponding body, such as the base station body 100. The specific installation form of the on / off component 600 on the liquid inlet pipe 500 and / or the base station body 100 is determined comprehensively based on the type of the liquid inlet pipe 500 and the type of the on / off component 600. In one embodiment of the liquid extraction system 300 of the present invention, the on / off component 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 pipe 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 component 600 is in the first state, at which time the liquid inlet pipe 500 is closed. When the valve core is in the open state, the on / off component 600 is in the second state, at which time the liquid inlet pipe 500 is connected to the liquid storage container 310.

[0060] Referring to Figures 2 and 9, in one embodiment of the liquid extraction 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. At least part of the gas discharged from the first negative pressure device 400 drives the valve core to a squeezed state and drives the pneumatic pinch valve to clamp and block the liquid inlet pipeline 500. This arrangement allows the pneumatic pinch valve to operate while the first negative pressure device 400 is extracting air from the liquid storage container 310, thereby achieving both the cutting off and connection of the liquid inlet pipeline 500. Directly driving the pneumatic pinch valve through the first negative pressure device 400 simplifies system design and reduces manufacturing and maintenance costs.

[0061] Referring to Figure 11, in one embodiment of the liquid extraction system 300 of the present invention, the pipeline on / off valve is a pneumatic pinch valve. The liquid extraction system 300 also 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. The gas discharged by the second negative pressure device 625 drives the valve core to a squeezed state. By setting a second negative pressure device 625 that independently supplies air to the pneumatic pinch valve, the opening and closing of the pneumatic pinch valve is not affected by the action of the first negative pressure device 400. The pneumatic pinch valve can be shut off before the first negative pressure device 400 performs the evacuation operation on the liquid storage container 310, which can accelerate the formation of negative pressure in the liquid storage container 310.

[0062] Referring to Figure 9, in one embodiment of the liquid extraction system 300 of the present invention, the on / off component 600 further includes a control valve 624, which is a two-position three-way solenoid valve. The control valve 624 includes an inlet valve port 6241, a first outlet valve port 6242, and a second outlet valve port 6243. The exhaust port of the first negative pressure device 400 is connected to the inlet valve port 6241; the first outlet valve port 6242 is connected to the inlet port of the pneumatic pinch valve; and the second outlet valve port 6243 is connected to the atmosphere. It should be noted that those skilled in the art will understand that the control valve 624 can also be any other valve structure with the same function as the two-position three-way solenoid valve.

[0063] Please refer to Figures 2, 9, and 10. In one embodiment of the liquid extraction system 300 of the present invention, the on / off component 600 further includes a pressure limiting valve 623. 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 pressure limiting valve 623 can be of various types, including but not limited to safety valves, pressure reducing valves, and relief valves. The pressure limiting valve 623 can prevent the internal pressure of the pneumatic pinch valve from exceeding its design capacity, thus preventing explosion or rupture and effectively protecting the pneumatic pinch valve.

[0064] Please refer to Figures 2 and 9 to 11. In one embodiment of the liquid extraction system 300 of the present invention, the on / off component 600 further includes a vent valve 621. The vent valve 621 includes an inlet port 6211 and an outlet port 6212. The inlet port 6211 is connected to the outlet of the pneumatic pinch valve, and the outlet port 6212 is connected to the atmosphere. The vent valve 621 allows the gas inside the pneumatic pinch valve to be discharged quickly, thereby improving the opening speed of the pneumatic pinch valve.

[0065] In another embodiment of the liquid extraction system 300 of the present invention, the on / off component 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 pipe 500 and / or the corresponding base station body 100. The valve core is rotatably disposed within 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 component 600 is in a first state. When the valve core flow channel of the valve core corresponds to the valve body flow channel, the on / off component 600 is in a second state. This type of pipeline on / off valve can achieve the cutting off and opening of the liquid inlet pipe 500 by rotating the valve core, which has good operability and is easy to further adopt electric control. Preferably, in one embodiment of the liquid extraction system 300 of the present invention, the pipeline on / off valve is an electric ball valve. An electric ball valve is a type of valve that opens and closes by rotating a ball driven by an electric actuator. It is low in cost and highly reliable.

[0066] In one embodiment of the liquid extraction system 300 of the present invention, the on / off component 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 disposed within 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 component 600 is in a first state. When the valve core is in the second position, the on / off component 600 is in a second state. In this scheme, the on / off component 600 is switched between the first and second states by the movement of the valve core relative to the valve body 610. It can have a small displacement on the cutting-off path and has a high response speed. The pipeline on / off valve is any one of a butterfly valve, a gate valve, or a solenoid clamp valve. The butterfly valve is simple to open and close and has low fluid resistance. The gate valve moves perpendicular to the medium flow direction, making opening and closing less effort. The inlet pipe 500 has a flexible pipe section 513. The valve core of the electromagnetic pinch valve clamps and releases the flexible pipe by moving between a first position and a second position, thereby opening and closing the inlet pipe 500. Compared with other types of electromagnetic valves, the liquid does not come into contact with the valve core of the electromagnetic pinch valve, resulting in a longer service life.

[0067] The type of inlet pipe 500 in this invention can be selected according to the type of on / off component 600. Preferably, in one embodiment of the liquid pumping system 300 of this invention, the on / off component 600 includes a valve body 610 and a valve core. The valve body 610 is installed on the inlet pipe 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 inlet pipe 500 includes a rigid pipe section and a flexible pipe section 513. The connection method between the rigid pipe section and the flexible pipe section 513 is not limited, as long as a reliable sealing connection is achieved. The rigid pipe section is located in the 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 a compressed state, it compresses the flexible tube segment 513, putting the on / off assembly 600 in a first state, at which point the inlet pipe 500 is closed. When the valve core is in an open state, it releases the compression of the flexible tube segment 513, and the on / off assembly 600 is in a second state, at which point the inlet pipe 500 is connected to the storage container 310. By providing the flexible tube segment 513 and clamping it with the valve core, wastewater is prevented from passing through the internal flow channel of the valve core, thus avoiding corrosion and damage to the valve core and increasing the service life of the on / off assembly 600. In other embodiments, the inlet pipe 500 is divided into two sections. One end of one section is connected to the inlet of the pneumatic pinch valve, and the other end is connected to the outlet of the pneumatic pinch valve. The on / off and on / off states of the pneumatic pinch valve's valve core are used to control the inlet pipe.

[0068] In one embodiment of the liquid extraction system 300 of the present invention, the on / off component 600 includes a pipeline on / off valve, which is an electromagnetic pinch valve. The liquid inlet pipeline 500 includes a rigid pipe section and a flexible pipe section 513, the flexible pipe section 513 being traversed by the movement path of the valve core of the electromagnetic pinch valve. During its movement, the valve core of the electromagnetic pinch valve presses or releases the flexible pipe section 513, thereby closing or opening the liquid inlet pipeline 500.

[0069] Referring to Figures 7 to 11, in one embodiment of the liquid extraction system 300 of the present invention, the liquid inlet pipe 500 includes a straight pipe section 510 extending in a straight line, and the on / off component 600 is provided corresponding to the straight pipe section 510 of the liquid inlet pipe 500. By setting the on / off component 600 on the straight pipe section 510, not only is the sewage extraction efficiency and system stability improved, but it also helps to reduce the residue of sewage and pressure loss at the location of the on / off component 600, making the operation of the entire cleaning base station 10 more efficient, reliable and economical.

[0070] In the liquid extraction system 300 of the present invention, the straight pipe section 510 can be a single integral section or composed of multiple connected pipe sections, depending on the structure and installation method of the on / off component 600. Referring to Figure 7, in one embodiment of the liquid extraction system 300, the inlet pipe 500 includes a first straight pipe section 511 and a second straight pipe section 512. One end of the on / off component 600 is connected to the first straight pipe section 511, and the other end is connected to the second straight pipe section 512. In a second state, the on / off component 600 includes a flow channel extending in a straight line. One end of the flow channel is connected to the first straight pipe section 511, and the other end 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 interconnected to form a sewage channel extending vertically. This arrangement reduces the resistance of the valve body 610, reduces energy loss of sewage passing through the valve body 610 during extraction, and prevents blockage of the flow channel in the valve body 610 by contaminants.

[0071] In one embodiment of the liquid extraction system 300 of the present invention, the opening time of the on / off component 600 is not strictly limited. However, considering that the opening speed of the on / off component 600 has a significant impact on the extraction and collection of contaminants, an excessively slow opening speed will result in insufficient pressure at the start of extraction, incomplete removal of sediment from the cleaning tank 120, and potential blockage of the inlet pipe 500. Preferably, in one 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 0.3 seconds and 1 second. Under this opening time limitation, sufficient negative pressure suction can be ensured when the flow channel of the on / off component 600 is fully open, resulting in a better extraction effect.

[0072] Referring to Figures 3 to 6, in one embodiment of the liquid extraction system 300 of the present invention, the liquid extraction system 300 further includes a pressure relief valve 330. The pressure relief valve 330 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 opens to connect the inner cavity of the liquid storage container 310 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 closes to seal the liquid storage container 310. The structure of the pressure relief valve 330 and its installation method on the liquid storage container 310 are not limited. For example, it can be installed on the tank 314 and located above the highest liquid level, or it can be installed on the tank cover 320. When the negative pressure in the liquid storage container 310 is less than the set threshold, the pressure relief valve 330 opens to allow air to enter the liquid storage container 310. By setting a pressure relief valve 330, when the vacuum inside the liquid storage container 310 is too high, air can be automatically replenished, which not only maintains the negative pressure inside the liquid storage container 310 at the set threshold, but also effectively prevents damage to the liquid storage container 310.

[0073] Please refer to Figures 3 to 6. The pressure relief valve 330 in this invention can also refer to the existing gas pressure limiting valve structure and can be obtained through general commercial means. Preferably, please refer to Figures 5 to 6. In one embodiment of the liquid pumping system 300 of this invention, the pressure relief valve 330 includes a pressure relief chamber 321, a pressure relief cover 331, a sealing plate 333, and an elastic element 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 that is connected to the outside atmosphere. One end of the elastic element 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 cuboid, cylinder or irregular shape. In this embodiment, the pressure relief chamber 321 is a cylindrical cavity. The bottom wall of the pressure relief chamber 321 is provided with a first through hole 322. The pressure relief chamber 321 is connected to 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. The pressure relief port 335 is opened on the pressure relief cover 331. A baffle plate 336 is covered on the pressure relief port 335 to prevent dust from clogging the pressure relief port 335. A second through hole 3361 is opened on the baffle plate 336. The pressure relief port 335 is connected to the external atmospheric environment through the second through hole 3361. In this invention, the elastic element 334 can be any suitable structure capable of providing elastic force to seal the sealing plate 333 against the pressure relief port 335, such as a bent elastic leaf, a spring, etc., but is not limited thereto. Preferably, in this embodiment, the elastic element 334 is a spring. The lower end of the elastic element 334 is installed on the wall of the pressure relief chamber 321, and the upper end of the elastic element 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 in a sealed contact. In the non-pressure relief state, under the action of the elastic element 334, the sealing plate 333 is sealed against the pressure relief cover 331 and seals the pressure relief port 335. The elastic element 334, which presses the sealing plate 333 against the pressure relief cover 331 with a force determined by the maximum value of the set threshold of the liquid storage container 310, allows air to enter when the negative pressure inside the liquid storage container 310 is greater than the maximum value of the set threshold. Conversely, when the negative pressure inside the liquid storage container 310 is less than or equal to the maximum value of the set threshold, the sealing plate 333 remains sealed against the pressure relief cover 331 under the elastic force of the elastic element 334. In this design, the pressure relief valve 330 is controlled by the elastic element 334, eliminating the need for additional electrical connections, resulting in relatively high safety and low cost. It also facilitates the opening or removal of the cover 320.

[0074] Please refer to Figures 3 to 6. Although the elastic element 334 in the pressure relief valve 330 of the present invention can provide movement limitation for the sealing plate 333 when it has a large rigidity, considering the stability of the sealing plate 333 during movement, preferably, in one embodiment of the liquid extraction system 300 of the present invention, a guide rod 338 is provided on the wall of the pressure relief chamber 321, and the sealing plate 333 and the guide rod 338 are in sliding engagement. Through the sliding engagement between the sealing plate 333 and the guide rod 338, the sealing plate 333 can be installed relatively stably in the pressure relief chamber 321, and will not be offset or misaligned during the sliding process of the sealing plate 333, thereby improving the sealing reliability of the sealing plate 333.

[0075] Please refer to Figures 3 to 6. In this invention, there are various sliding engagement methods between the sealing plate 333 and the guide rod 338. In one embodiment of the liquid extraction system 300 of this invention, the sealing plate 333 has a sliding block 337 on the side facing the guide rod 338, and the sliding block 337 has a sliding groove 339 on the side facing the guide rod 338. The end of the guide rod 338 slides in the sliding groove 339. In other embodiments, the sealing plate 333 may also have a sliding block 337 on the side facing the guide rod 338, and the guide rod 338 may have a sliding groove 339 on the side facing the sealing plate 333. The sliding block 337 slides in the sliding groove 339. The root of the guide rod 338 is provided with a frustum that matches the inner hole of the spring. One end of the spring is fitted onto the sliding block 337, and the other end is fitted onto the frustum at the root of the guide rod 338.

[0076] Please refer to Figures 3 to 6. In this invention, although it is possible to achieve a sealed connection between the sealing plate 333 and the pressure relief port 335 solely through the material selection of the sealing plate 333 without setting the sealing element 332, it is preferable that, in one embodiment of the liquid extraction system 300 of this invention, the sealing plate 333 has a sealing element 332 on the side facing 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 element 332. This arrangement method can form an end-face sealing structure with pre-tightening pressure between the sealing plate 333, the sealing element 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 radial sealing methods.

[0077] Please refer to Figures 1 and 2. The present invention also provides a cleaning base station 10, which includes a base station body 100 and any of the above-described liquid extraction systems 300. The cleaning tank 120 is disposed at the bottom of the base station body 100 to clean the cleaning components of the cleaning equipment. The liquid extraction system 300 is disposed inside the base station body 100. The end of the liquid inlet pipe 500 away from the liquid storage container 310 is connected to the cleaning tank 120.

[0078] It should be noted that in the cleaning base station 10, if the on / off component 600 is not installed, when the inlet pipe 500 is not closed, when the storage container 310 is being pumped, as long as the negative pressure reaches the pressure that can draw some sewage into the storage container 310, the sewage will automatically enter the storage container 310 along the inlet pipe 500. At this time, the pressure in the storage container 310 will increase until the negative pressure in the storage container 310 can no longer meet the minimum suction force required for pumping. At this time, the pumping will be interrupted. When the pumping operation continues until the negative pressure in the storage container 310 is sufficient to draw some sewage into the storage container 310 again, the pumping operation will continue. This process is repeated multiple times until the sewage in the cleaning tank 120 is drained. During this process, because the pumping operation is interrupted multiple times, the sewage will re-combine with air each time the pumping starts, resulting in a loud bubbling sound. Furthermore, this method is intermittent and the overall operation time is relatively long. In contrast, in this invention, because the pumping channel is closed, a larger negative pressure can be accumulated.

[0079] In the liquid extraction system 300 of the cleaning base station 10 of the present invention, a switching component 600 is installed on the inlet pipe 500 between the liquid storage container 310 and the cleaning tank 120. This allows for relative isolation between the liquid storage container 310 and the cavity of the cleaning tank 120. Under the action of the first negative pressure device 400, a large negative pressure can be formed in the liquid storage container 310, and the wastewater in the cleaning tank 120 can be extracted under this negative pressure. Compared with the suction method of simultaneously suctioning air and sewage, this reduces the number of suction operations. Furthermore, the negative pressure threshold in the liquid storage container 310 can be set by considering the volume of the cleaning tank 120, the diameter of the inlet pipe 500, and the distance between the liquid storage container 310 and the cleaning tank 120, allowing all the wastewater in the cleaning tank 120 to be extracted into the liquid storage container 310 in one go. This effectively improves the sewage extraction speed and reduces the time required for sewage extraction. Furthermore, because the number of suction operations is reduced, the number of times gas and sewage combine is also reduced, which can reduce bubble noise. In addition, the cleaning base station 10 of the present invention can obtain greater suction force compared with the suction operation method of suctioning air and sewage at the same time, which can increase the carrying rate of deposited impurities in the cleaning tank 120, reduce the dirt deposition at the bottom of the cleaning tank 120, and help to achieve complete maintenance-free cleaning of the cleaning tank 120.

[0080] Referring to Figures 4 and 12, in one embodiment of the clean 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 liquid level detection device 313 is not limited, including but not limited to magnetic level gauges, float level gauges, steel strip level gauges, radar level gauges, differential pressure level gauges, etc. In this embodiment, the liquid level detection device 313 is a Hall effect liquid level sensor. The Hall effect liquid level sensor includes a detection element and a sensing element 3131. The sensing element 3131 is movably disposed within the liquid storage container 310 and rises with the increase of the liquid level in the liquid storage container 310, or continues to rise with the increase of the liquid level after the liquid level in the liquid storage container 310 reaches a preset height. The Hall effect liquid level sensor has high accuracy and strong anti-interference capability.

[0081] In this 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 rise and is sensed by the detection element when it reaches the set position. Referring to Figure 12, in one embodiment of the cleaning base station 10 of this invention, the sensing element 3131 has a rotating end 3132 and a sensing end 3133. The rotating end 3132 is rotatably connected inside 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 element 3134 and a Hall sensor. The magnetic element 3134 is disposed on the sensing end 3133, and the Hall sensor is disposed inside the base station body 100 and corresponds to the magnetic element 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 level gauge.

[0082] In one embodiment of the cleaning base station 10 of the present invention, the sensor 3131 has a maximum sensing position, which is the highest liquid level height that the sensor 3131 can sense. The liquid storage container 310 has a maximum capacity surface, which is the liquid level height corresponding to the maximum amount of liquid that the liquid storage container 310 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 120. With this configuration, during the sludge extraction process, when the sensing end 3133 of the liquid level detection device 313 is about to reach the maximum sensing position but has not yet triggered, the wastewater generated by the single cleaning component in the cleaning tank 120 still needs to be extracted into the liquid storage container 310. The fact that the volume between the maximum sensing position and the maximum capacity surface is greater than or equal to the volume of the cleaning tank 120 ensures that the liquid storage container 310 still has sufficient space to accommodate the wastewater generated by the single cleaning component in the cleaning tank 120, preventing wastewater from overflowing the liquid storage container 310. After the sewage enters the storage container 310, the sewage level 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 trigger a full liquid alarm, reminding the user to empty the sewage after pumping is completed.

[0083] In one 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 volume of wastewater generated in the cleaning tank 120 when the cleaning base station 10 performs a single cleaning operation on the cleaning component. It should be noted that a single operation includes the entire process from the start of cleaning the cleaning component to the completion of cleaning.

[0084] Although the wastewater in the storage container 310 can also be discharged by pouring, in one embodiment of the cleaning base station 10, the cleaning base station 10 further includes a drain pipe (not shown). One end of the drain pipe is connected to the bottom of the storage container 310, and the other end is a free end. A valve component (not shown) is provided on the drain pipe. When the storage container 310 is full, the free end of the drain pipe is inserted into a floor drain, and the drain pipe is opened by opening the valve component, allowing the wastewater in the storage container 310 to be directly discharged into the floor drain. This arrangement reduces the burden of manual pouring and also provides a good platform for automatic sewage discharge.

[0085] Considering the corrosive nature of the wastewater from the clean base station 10, in one embodiment of the clean base station 10 of the present invention, the inlet pipe 500 is a rigid corrosion-resistant pipe, which is fixed to the base station body 100. The on / off component 600 is an electric valve, which includes a control unit 620 and a valve body 610. The valve body 610 is directly installed on the corrosion-resistant inlet pipe 500, and the control unit 620 is rigidly connected to the valve body 610. Neither the control unit 620 nor the valve body 610 is connected to the base station body 100. In another embodiment, the on / off component 600 may be installed only on the base station body 100, or some components may be installed on the base station body 100 and some components may be installed on the inlet pipe 500.

[0086] In the cleaning base station 10 of the present invention, the on / off component 600 can be a manual valve, and in this case, it may not necessarily include a control unit 620. For the sake of automated control, please refer to Figures 7 to 11. In some embodiments of the cleaning base station 10 of the present invention, the on / off component 600 includes a control unit 620 and a valve body 610. The valve body 610 is installed on the liquid inlet pipe 500, and the control unit 620 is installed on the liquid inlet pipe 500 and / or the base station body 100, and is electrically connected to the controller 700, thereby controlling the valve body 610 to open and close the liquid inlet pipe 500. This configuration enables automated control within the on / off component 600, which improves the operating efficiency and accuracy of the cleaning base station 10. No manual operation of the valve body 610 is required, reducing the possibility of human error.

[0087] Although the valve body 610 can be controlled manually by the control unit 620 (see Figure 2), in one embodiment of the cleaning base station 10 of the present invention, the cleaning base station 10 also includes a controller 700. The controller 700 is electrically connected to the control unit 620 and can automatically control the control unit 620 within the on / off component 600. This configuration allows the controller 700 to automatically adjust the valve according to a preset program or real-time feedback, achieving intelligent control. This is significant for improving the intelligence level and user experience of the cleaning base station 10. Simultaneously, the electrically connected controller 700 facilitates integration with other automation or monitoring systems of the cleaning base station 10, providing convenience for system expansion and upgrades. It should be noted that the method by which the controller 700 controls the opening and closing of the valve body 610 through the control unit 620 can be used in conventional control methods in the field of automation, and will not be elaborated further here.

[0088] The arrangement of the liquid inlet pipe 500 in this invention is not limited. Those skilled in the art will understand that as long as a shut-off component 600 is provided on the liquid inlet pipe 500, the liquid storage container 310 can be closed relative to the cleaning tank 120. This creates a negative pressure at a set threshold within the liquid storage container 310 and provides greater suction compared to the original state where the liquid storage container 310 is directly connected to the cleaning tank 120 without the shut-off component 600. However, to prevent contaminants from remaining in the liquid inlet pipe 500 and to reduce pressure loss, please refer to Figures 2 and 9. In one embodiment of the cleaning base station 10 of this invention, the liquid inlet pipe 500 includes a straight pipe section 510 extending in a straight line, and a valve body 610 is installed on the straight pipe section 510. By placing the valve body 610 on the straight pipe section 510, not only is the pumping efficiency and system stability improved, but it also helps reduce contaminant residue and pressure loss at the valve body 610, making the operation of the entire cleaning base station 10 more efficient, reliable, and economical.

[0089] Referring to Figures 2, 4, and 9, in one embodiment of the clean base station 10 of the present invention, a liquid storage container 310 is disposed on the top of the base station body 100, and a straight pipe section 510 is disposed vertically. The upper end of the straight pipe section 510 is connected to the sewage connector 311 inside 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 and horizontal pipe sections, and can prevent the blockage caused by dirt settling on the inner wall of the liquid inlet pipe 500 under the action of gravity.

[0090] In this invention, the straight pipe section 510 can be a single integral section or composed of multiple connected pipe sections, depending on the structure and installation method of the valve body 610. Referring to Figure 7, in one embodiment of the cleaning base station 10 of this invention, the liquid inlet pipe 500 includes a first straight pipe section 511 and a second straight pipe section 512. In a second state, the valve body 610 includes a flow channel extending in a straight line. One end of the flow channel is connected to the first straight pipe section 511, and the other end 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 interconnected to form a sewage channel extending vertically. This arrangement reduces the resistance of the valve body 610, reduces energy loss during sewage suction, and prevents blockage of the flow channel in the valve body 610 by contaminants.

[0091] In this invention, the materials 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 one embodiment of the cleaning base station 10 of this invention, both the first straight pipe section 511 and the second straight pipe section 512 are rigid pipes, and the two ends of the on / off component 600 are respectively sealed to the first straight pipe section 511 and the second straight pipe section 512 through quick-connect couplings. The form of the quick-connect coupling can refer to the form of quick-connect couplings commonly used in the hydraulic field, and can be obtained through general commercial means, and will not be described in detail here. It should be noted that if the quickness 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, which will not be listed one by one.

[0092] Please refer to Figures 8 to 11. In one embodiment of the clean base station 10 of the present invention, the liquid inlet pipe 500 includes a flexible pipe section 513. The valve body 610 of the on / off component 600 is a pinch valve, which is installed on the flexible pipe section 513. The control unit 620 is installed on the liquid inlet pipe 500 and / or the base station body 100. The control unit 620 controls the pinch valve to clamp and block the flexible pipe section 513 in a first state and to release the flexible pipe section 513 in a 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. The requirement is that it is installed on the flexible pipe section 513 and can clamp the flexible pipe section 513 to interrupt the liquid inlet pipe 500. By setting up the flexible pipe section 513 and clamping and blocking the flexible pipe section 513 by the pinch valve, sewage can be prevented from passing through the internal flow channel of the valve body 610, thus avoiding corrosion and damage to the valve body 610 and increasing the service life of the valve body 610.

[0093] The material and specific dimensions of the flexible tube segment 513 in this invention are suitable to meet the needs of sludge pumping and to facilitate the clamping and blocking of the inlet pipe 500 by the pinch valve. In one embodiment, the flexible tube segment 513 is a silicone tube with a hardness of 60° to 80°, for example, any value between 60° and 80°, such as 60°, 70°, or 80°. The inner diameter is φ18mm to φ22mm, for example, any value between φ18mm, 20mm, or 22mm, such as φ18mm, 20mm, or 22mm. The wall thickness is 1mm to 2mm. This selection of material and size range not only gives the flexible tube segment 513 good corrosion resistance and aging resistance, but also good elasticity, making it easy to clamp under the action of the pinch valve and elastically recover its deformation after the pinch valve is released.

[0094] Referring to Figure 9, in one embodiment of the clean base station 10 of the present invention, the clamp valve is a pneumatic clamp valve. The pneumatic clamp valve includes a first interface 611 for air intake and exhaust, and the opening and closing of the pneumatic clamp valve is controlled by the air intake and exhaust of the first interface 611. The control unit 620 also includes a pressure limiting valve 623, a control valve 624, and an exhaust valve 621. The controller 700 of the clean base station 10 is electrically connected to the control valve 624, the exhaust valve 621, and the first negative pressure device 400, respectively, to control the opening and closing of the control valve 624, the exhaust valve 621, and the first negative pressure device 400. The air inlet of the pressure limiting valve 623, the first exhaust valve port 6242, and the air inlet of the exhaust valve 621 are all connected to the first interface 611 through a pipe joint 622 (four-way pipe joint); the exhaust port of the pressure limiting valve 623, the second exhaust valve port of the control valve 624, and the exhaust port of the exhaust valve 621 are connected to the external atmospheric environment. The pressure relief valve 623 prevents excessive internal pressure in the pneumatic pinch valve. When sludge removal is required from the cleaning tank 120, the controller 700 closes the vent valve 621 and controls the control valve 624 to connect the exhaust port of the first negative pressure device 400 to the first interface 611 via the pipe joint 622, thus activating the first negative pressure device 400. While the first negative pressure device 400 draws air from the storage container 310, it simultaneously inflates the pneumatic pinch valve and closes it. At this point, the control valve 624 connects the first negative pressure device 400 to the atmosphere. When the storage container 310 is sludged to a set negative pressure threshold, the first negative pressure device 400 is closed, and the vent valve 621 opens to release air from the pneumatic pinch valve. Simultaneously, the pneumatic pinch valve opens the inlet pipe 500 and draws the sludge from the cleaning tank 120 into the storage container 310. In this scheme, the pneumatic pinch valve can be protected by the pressure relief valve 623, and the operation of the first negative pressure device 400 at each stage can be switched 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 by the switching of the control valve 624, which can reduce the pulsating impact on the pneumatic pinch valve during the exhaust process of the first negative pressure device 400 to the atmosphere.

[0095] Please refer to Figure 10. In one embodiment of the clean base station 10 of the present invention, the pneumatic clamp valve includes a first interface 611 for air intake and exhaust. Unlike the scheme in Figure 9, the control unit 620 does not include a control valve 624, but only includes a pressure limiting valve 623 and an exhaust valve 621 for exhaust. The exhaust port of the first negative pressure device 400, the air intake port of the pressure limiting valve 623, and the air intake port of the exhaust valve 621 are all connected to the first interface 611 through a pipe joint 622 (four-way pipe joint 622). The exhaust ports of the pressure limiting valve 623 and the exhaust ports of the exhaust valve 621 are all connected to the external atmospheric environment. When sludge removal is required from the cleaning tank 120, the first negative pressure device 400 operates, providing closing air pressure to the pneumatic pinch valve while simultaneously evacuating the liquid storage container 310. Once the pneumatic pinch valve is closed and the negative pressure inside the liquid storage container 310 reaches a set threshold, the first negative pressure device 400 is shut off. Then, the vent valve 621 is opened to release air from the pneumatic pinch valve, simultaneously drawing the sludge from the cleaning tank 120 into the liquid storage container 310. In this scheme, the vent valve 621 integrates the control of the first negative pressure device 400 and the pneumatic pinch valve to release air into the atmosphere, simplifying the circuit compared to the scheme in Figure 9 and saving costs.

[0096] Please refer to Figure 11. In one embodiment of the cleaning base station 10 of the present invention, the clamp valve is a pneumatic clamp valve, which differs from the schemes in Figures 9 and 10. The control unit 620 includes a second negative pressure device 625 that independently drives the pneumatic clamp 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 vent valve 621 are both connected to the first interface 611 of the pneumatic clamp valve through a pipe joint 622 (three-way pipe joint 622). The suction port of the second negative pressure device 625 and the exhaust port of the vent valve 621 are both connected to the external atmospheric environment. The second negative pressure device 625 drives the pneumatic clamp valve to clamp and block the flexible pipe section 513. When it is necessary to perform a sludge removal operation on the cleaning tank 120, the second negative pressure device 625 operates, providing sufficient closing air pressure to the pneumatic clamp valve before stopping operation. After the second negative pressure device 625 stops working, the first negative pressure device 400 starts working, pumping the liquid storage container 310 until the negative pressure reaches the set threshold, at which point the first negative pressure device 400 stops working. The vent valve 621 opens to release air from the pneumatic pinch valve, and simultaneously, the wastewater in the cleaning tank 120 is pumped into the liquid storage container 310. In this scheme, a second negative pressure device 625 is provided independently to supply air to the pneumatic pinch valve. The opening and closing of the pneumatic pinch valve is not affected by the action of the first negative pressure device 400. The pneumatic pinch valve can be shut off before the first negative pressure device 400 pumps air from the liquid storage container 310, which can accelerate the formation of negative pressure in the liquid storage container 310. Furthermore, this scheme includes a vent valve 621, and the controller 700 of the cleaning base station 10 can control the opening and closing of the vent valve 621 to release pressure from the pneumatic pinch valve. Compared to a structure that manually releases pressure from the pneumatic pinch valve, this scheme has a higher degree of automation.

[0097] The present invention also provides a cleaning system comprising a self-moving cleaning device and a cleaning base station 10 as described in any of the preceding claims. The cleaning base station 10 performs cleaning operations on the cleaning components of the cleaning device. The self-moving cleaning device is configured to move on the floor to complete the corresponding cleaning tasks. In practical applications, the self-moving cleaning device may specifically manifest as a sweeping robot, a mopping robot, or a combined sweeping and mopping robot. To perform its necessary cleaning functions, the self-moving cleaning device includes at least cleaning components, such as a mop and a roller brush. To enable the cleaning components to function, it may also include conventional structures such as a spray assembly, a clean water tank, a battery, and a walking drive system. Self-propelled cleaning equipment can also integrate various other functions of existing self-propelled cleaning equipment according to actual needs. These functions may include, but are not limited to, autonomous travel planning based on sensors such as accelerometers, gyroscopes, and odometers; obstacle recognition and anti-collision functions based on distance sensors and image recognition devices; autonomous walking functions based on mechanical mechanisms such as drive wheel sets, driven wheel sets, and drivers; human-computer interaction functions based on physical buttons, virtual buttons, displays, and indicator lights; energy supply functions based on rechargeable batteries; and intelligent control functions based on control circuits or control chips. These will not be elaborated on in detail.

[0098] This invention's liquid extraction system, by incorporating on / off components corresponding to the inlet pipe, can cut off the inlet pipe, creating a sealed space inside the storage container. This, combined with the first negative pressure device, generates a significant negative pressure within the storage container. Compared to suction methods that simultaneously extract air and remove contaminants, this reduces the number of extractions. Furthermore, by adjusting the volume of the cleaning tank and setting a negative pressure threshold in the storage container, all wastewater in the cleaning tank can be extracted into the storage container in a single operation. This effectively increases the extraction speed and reduces the time required for wastewater extraction. The reduced number of extractions also decreases the frequency of gas-wastewater interaction, thus reducing bubbling noise. Additionally, compared to suction methods that simultaneously extract air and remove contaminants, this invention's cleaning station achieves greater suction force, increasing the carry-over rate of deposited impurities in the cleaning tank and reducing dirt buildup at the bottom, ultimately leading to a completely maintenance-free cleaning tank.

[0099] In summary, this invention effectively overcomes some practical problems in the prior art, thus possessing high utilization value and significance. The above embodiments are merely illustrative of the principles and effects of this invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A liquid extraction system, characterized by, include: liquid storage container; A liquid inlet pipe, which 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; A switching component is provided corresponding to the liquid inlet pipe, and the switching component has a first state that blocks the liquid inlet pipe and a second state that connects the liquid inlet pipe. Specifically, when 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 inside the liquid storage container reach a set threshold. When the negative pressure inside the liquid storage container is maintained at the set threshold, the on / off component is switched to the second state, and the negative pressure of the liquid storage container allows external liquid to enter the liquid storage container through the liquid inlet pipe.

2. The liquid extraction system of claim 1, wherein, The on / off assembly includes a pipeline on / off valve, which includes a valve body and a valve core. The valve core has a compressed state and an open state. When the valve core is in the compressed state, the on / off assembly is in a first state; when the valve core is in the open state, the on / off assembly is in a second state.

3. The liquid extraction system of claim 2, wherein, The pipeline on / off valve is a pneumatic pinch valve. 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. The gas discharged by the second negative pressure device drives the valve core to a squeezed state.

4. The liquid extraction system according to claim 2, characterized in that, The pipeline on / off valve is a pneumatic clamp valve. The air inlet of the pneumatic clamp valve is connected to the exhaust port of the first negative pressure device. At least part of the gas discharged from the first negative pressure device drives the valve core to a squeezed state.

5. The liquid extraction system according to claim 4, characterized in that, The on / off assembly further includes a control valve, which includes an inlet valve, a first outlet valve, and a second outlet valve. The exhaust port of the first negative pressure device is connected to the inlet valve, the first outlet valve is connected to the inlet of the pneumatic clamp valve, and the second outlet valve is connected to the atmosphere.

6. The liquid extraction system according to claim 5, characterized in that, The control valve is a two-position three-way solenoid valve.

7. The liquid extraction system according to any one of claims 3-5, characterized in that, The on / off assembly also includes a pressure relief valve, which has a gas inlet and a gas outlet. The gas inlet is connected to the outlet of the pneumatic pinch valve, and the gas outlet is connected to the atmosphere.

8. The liquid extraction system according to any one of claims 3-5, characterized in that, The on / off assembly also includes a vent valve, which has an inlet port and an outlet port. The inlet port is connected to the outlet port of the pneumatic clamp valve, and the outlet port is connected to the atmosphere.

9. The liquid extraction system according to claim 1, 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 disposed within 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. 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.

10. The liquid extraction system according to claim 9, characterized in that, The pipeline on / off valve is an electric ball valve.

11. The liquid extraction system according to claim 1, 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 disposed within 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.

12. The liquid extraction system according to claim 11, characterized in that, The pipeline on / off valve is any one of a butterfly valve, gate valve, or solenoid clamp valve.

13. The liquid extraction system according to claim 3 or 4, characterized in that, The liquid inlet pipe includes a rigid pipe section and a flexible pipe section, and the flexible pipe section passes through the valve core of the pneumatic clamp valve.

14. The liquid extraction system according to claim 11, characterized in that, The pipeline on / off valve is an electromagnetic clamp valve, and the liquid inlet pipeline includes a rigid pipe section and a flexible pipe section, with the flexible pipe section passing through the movement path of the valve core of the electromagnetic clamp valve.

15. The liquid extraction system according to claim 1, characterized in that, The liquid inlet pipe includes a straight pipe section extending in a straight line, and the on / off component is provided corresponding to the straight pipe section of the liquid inlet pipe.

16. The liquid extraction system according to claim 15, characterized in that, The straight pipe section includes a first straight pipe section and a second straight pipe section. One end of the on / off component is connected to the first straight pipe section, and the other end of the on / off component is connected to the second straight pipe section.

17. The liquid extraction system according to claim 1, characterized in that, The switching time of the on / off component from the first state to the second state is 0.3s to 1s.

18. The liquid extraction system according to claim 1, characterized in that, The liquid extraction system also includes a pressure relief valve located in the liquid storage container. When the negative pressure value in the liquid storage container is greater than the set threshold, 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, the pressure relief valve closes to seal the liquid storage container.

19. The liquid extraction system according to claim 18, characterized in that, The pressure relief valve includes a pressure relief chamber, a sealing plate, and an elastic element. 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 that is connected to the outside atmosphere. One end of the elastic element is installed on the wall of the pressure relief chamber, and the other end presses the sealing plate against the pressure relief port to seal it.

20. The liquid extraction system according to claim 19, characterized in that, The pressure relief chamber is provided with a guide rod on its wall, and the sealing plate and the guide rod slide against each other.

21. The liquid extraction system according to claim 20, characterized in that, The sealing plate has a sliding block on the side facing the guide rod, and the sliding block has a sliding groove on the side facing the guide rod, with the end of the guide rod sliding in the sliding groove; or, the sealing plate has a sliding block on the side facing the guide rod, and the guide rod has a sliding groove on the side facing the sealing plate, with the sliding block sliding in the sliding groove.

22. The liquid extraction system according to claim 19, characterized in that, The sealing plate has a sealing element on the side opposite to the elastic element, and the projection of the pressure relief port on the sealing plate is located within the area enclosed by the sealing element.

23. A clean base station, characterized in that, The system includes a base station body and a liquid extraction system as described in any one of claims 1-22. A cleaning tank is provided at the bottom of the base station body, the liquid extraction system is located inside the base station body, and the end of the liquid inlet pipe away from the liquid storage container is connected to the cleaning tank.

24. The clean base station according to claim 23, characterized in that, The cleaning base station also includes a liquid level detection device, which includes a detection element and a sensor. The detection element is used to sense the position of the sensor. The sensor is movably disposed 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.

25. The clean base station according to claim 24, characterized in that, The sensing element has a rotating end and a sensing end. The rotating end is rotatably connected inside the liquid storage container, and the sensing end rotates around the rotation axis of the rotating end to form a movement in the height direction.

26. The clean base station according to claim 25, characterized in that, The detection element includes a magnetic component and a Hall sensor. The magnetic component is located at the sensing end, and the Hall sensor is located inside the base station body and corresponds to the magnetic component.

27. The clean base station according to claim 24, characterized in that, The sensor has a maximum sensing position, which is the highest liquid level that the sensor 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.

28. The clean base station according to claim 27, 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.

29. The clean base station according to claim 23, characterized in that, The cleaning base station also includes a drainage 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 drainage pipe.

30. A cleaning system, characterized in that, Includes self-propelled cleaning equipment and a cleaning base station as described in any one of claims 23 to 29.

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