Cleaning device and sewage pumping method thereof

Abstract

The invention discloses a cleaning device and a sewage pumping method thereof, and the sewage pumping method comprises the steps: controlling a drain valve of a base station sewage tank and a pressure storage valve which is arranged on the base station sewage tank and is used for being connected with a host sewage tank to be closed, and converting the base station sewage tank into a preset negative pressure state through a gas pumping and discharging mechanism; and controlling the host sewage valve and the pressure storage valve to be opened at the same time, so that sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure action of the base station sewage tank. According to the cleaning device and the sewage pumping method, the problems that according to a sewage pumping method of a cleaning device in the prior art, large negative pressure pumping is difficult to achieve through a small air pump, and the sewage pumping effect is poor can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning appliances, and in particular to a cleaning device and a dirt extraction method thereof. Background Art

[0002] At present, cleaning devices such as floor scrubbers generate a large amount of sewage during the cleaning process. The generated sewage is stored in a sewage tank of the cleaning device. After the cleaning is completed or when a certain amount is reached, the sewage in the sewage tank is sucked out. However, it is difficult to achieve a large negative pressure suction function, and there are cases where the sewage suction effect is poor or the suction is incomplete. Summary of the invention

[0003] The main purpose of the present invention is to provide a cleaning device and a sewage extraction method thereof, so as to at least solve the problem of low sewage extraction efficiency of the existing cleaning device.

[0004] According to one aspect of the present invention, there is provided a sewage extraction method, comprising:

[0005] Control the drain valve of the base station sewage tank and the pressure storage valve on the base station sewage tank for connecting to the host sewage tank to close, and convert the base station sewage tank to a preset negative pressure state through the gas extraction mechanism;

[0006] The host sewage valve and the pressure storage valve are controlled to open simultaneously, so that the sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure of the base station sewage tank.

[0007] Furthermore, before the drain valve of the base station sewage tank and the pressure storage valve on the base station sewage tank for connecting to the host sewage tank are closed, it also includes:

[0008] Determine the sewage water level in the main engine sewage tank;

[0009] A preset negative pressure state value is set according to the sewage water level in the main engine sewage tank, and a pressure storage time is set according to the preset negative pressure state value combined with the pressure extraction rate of the air pump;

[0010] The sewage pumping time is set according to the sewage water level line of the main engine sewage tank and the pressure accumulation time.

[0011] Furthermore, the preset negative pressure state value includes the maximum negative pressure value of the sewage tank of the base station or the negative pressure value corresponding to the sewage water level line.

[0012] Furthermore, the step of converting the base station sewage tank to a preset negative pressure state through a gas extraction mechanism includes:

[0013] Switch the gas circuit of the air pump to negative pressure mode through the gas extraction mechanism;

[0014] Pumping pressure from the sewage tank of the base station by switching the air pump to negative pressure mode;

[0015] When the corresponding set pressure accumulation time is reached, the air pump is turned off to allow the base station sewage tank to reach a preset negative pressure state.

[0016] Furthermore, the controlling the host sewage valve and the pressure storage valve to open simultaneously so that the sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure of the base station sewage tank includes:

[0017] Opening the host sewage valve and the pressure storage valve at the same time, so that the sewage in the host sewage tank is sucked into the base station sewage tank under the preset negative pressure state of the base station sewage tank until the pressure storage time is reached;

[0018] If the air pump returns to a normal pressure value and there is still sewage in the host sewage tank, the steps of pumping pressure and sewage from the base station sewage tank are iteratively performed until all the sewage in the host sewage tank enters the base station sewage tank.

[0019] Furthermore, the host sewage valve includes a variety of opening control logics, and the opening control logics at least include opening on demand, continuous opening and staged opening.

[0020] Furthermore, after the host sewage valve and the pressure storage valve are controlled to be opened simultaneously so that the sewage in the host sewage tank is sucked into the base station sewage tank by the negative pressure of the base station sewage tank, the sewage extraction method further includes:

[0021] When all the sewage in the host sewage tank is sucked into the base station sewage tank, the base station sewage tank is converted to a preset positive pressure state through the gas extraction mechanism;

[0022] The pressure storage valve is closed and the drain valve is opened synchronously, so that the sewage in the sewage tank of the base station is discharged through the drain valve within the sewage discharge time.

[0023] Furthermore, before the synchronous closing of the pressure storage valve and the opening of the drainage valve so that the sewage in the sewage tank of the base station is discharged through the drainage valve, the method further includes:

[0024] Determining a sewage water level in the sewage tank of the base station;

[0025] The corresponding sewage discharge time is set according to the sewage water level line in the sewage tank of the base station.

[0026] Furthermore, the converting of the base station sewage tank to a preset positive pressure state through a gas extraction mechanism includes:

[0027] Switching the gas circuit of the air pump to a positive pressure mode through the gas extraction mechanism;

[0028] Pressurizing the sewage tank of the base station by means of the air pump after switching to the positive pressure mode;

[0029] When the air pump reaches a preset positive pressure value, the air pump stops working, so that the sewage tank of the base station reaches a preset positive pressure state.

[0030] According to another aspect of the present invention, a cleaning device is provided. The cleaning device is used to perform the above-mentioned dirt extraction method.

[0031] In the present invention, by optimizing the air circuit design and control strategy, accurately controlling the working mode of the air pump, and finely monitoring and adjusting the pressure changes inside the sewage tank of the base station, a large negative pressure suction function can be achieved through a small air pump, thereby significantly improving the suction efficiency without increasing energy consumption. By setting the preset negative pressure state value and pressure storage time, the small air pump continues to pump pressure on the sewage tank of the base station for a period of time, forming a negative pressure accumulation effect, allowing a strong negative pressure environment to be established in the initial stage, and providing favorable conditions for rapid suction. The preset negative pressure state value and pressure storage time are dynamically adjusted according to the sewage water level line in the host sewage tank, ensuring the efficiency and accuracy of the sewage extraction process. At the same time, by real-time monitoring of the working state of the air pump and the pressure changes in the sewage tank of the base station, the system can intelligently adjust the suction strategy to adapt to the sewage discharge requirements under different circumstances. By opening the host sewage valve and the pressure storage valve in stages, the flow speed and suction effect of the sewage can be more finely controlled. Especially when the sewage water level is high, the staged opening method can avoid problems such as sewage splashing or air pump overload, ensuring the safety and stability of the sewage extraction process. After completing the sewage suction, the base station sewage tank can automatically be converted from a negative pressure state to a positive pressure state so that the sewage can be discharged more efficiently. This not only improves the sewage discharge efficiency, but also reduces the risk of sewage residue and blockage in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of a cleaning device disclosed in an embodiment of the present invention;

[0034] Figure 2 A bottom view of the host disclosed in the embodiment of the present invention;

[0035] Figure 3 A schematic diagram of a local structure of a base station in a first viewing angle disclosed in an embodiment of the present invention;

[0036] Figure 4A schematic diagram of a local structure of a base station in a second viewing angle disclosed in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of a gas extraction mechanism disclosed in an embodiment of the present invention;

[0038] Figure 6 A flow chart of a sewage extraction method disclosed in an embodiment of the present invention;

[0039] Figure 7 A specific flow chart of step S10 of the sewage extraction method disclosed in an embodiment of the present invention;

[0040] Figure 8 A specific flow chart of step S20 of the sewage extraction method disclosed in an embodiment of the present invention;

[0041] Fig. 9 A specific flow chart of step S30 of the sewage extraction method disclosed in an embodiment of the present invention

[0042] Fig.10 This is a specific flow chart of step S40 of the sewage extraction method disclosed in an embodiment of the present invention.

[0043] The above drawings include the following reference numerals:

[0044] 10. Host; 11. Host sewage tank; 12. Sewage outlet; 13. Water inlet; 20. Base station; 201. Installation cavity; 202. Accommodation tank; 21. Base station body; 211. Sewage injection port; 212. Sewage discharge port; 213. Water injection port; 214. Base; 22. Base station sewage tank; 23. Sewage injection pipeline; 24. Drain valve; 25. Clean water tank; 30. Gas extraction mechanism; 31. First base; 32. Extraction component; 321. First air inlet pipe; 322. First exhaust pipe; 323. Second air inlet pipe; 324. Second exhaust pipe; 33. Reversing component; 34. Air pump; 341. Extraction port; 342. Exhaust port; 40. First on-off mechanism; 50. Second on-off mechanism. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0048] See also Figures 1 to 5 As shown, according to an embodiment of the present application, a cleaning device is provided, including a host 10 and a base station 20. The host 10 is provided with a host sewage tank 11, a sewage outlet 12 and a water inlet 13, and the base station 20 includes a base station body 21, and the base station body 21 is provided with a sewage injection port 211, a base station sewage tank 22, a sewage injection pipeline 23, a water discharge valve 24 and a clean water tank 25. A gas extraction mechanism 30 is provided in the base station sewage tank 22, and the sewage injection port 211, the water discharge valve 24 and the gas extraction mechanism 30 are connected to the base station sewage tank 22. The base station body 21 includes a base 214 and a cover body, and a receiving groove 202 is provided on the base 214. The gas extraction mechanism 30 has a preset negative pressure state and a preset positive pressure state. When the host 10 is docked with the base station body 21, the sewage outlet 12 is connected to the sewage injection port 211; when the gas extraction mechanism 30 is in the preset negative pressure state, the gas extraction mechanism 30 is used to vacuum the base station sewage tank 22 to form a negative pressure in the base station sewage tank 22; when the gas extraction mechanism 30 is in the preset positive pressure state, the gas extraction mechanism 30 is used to pressurize the base station sewage tank 22 to increase the gas pressure in the base station sewage tank 22.

[0049] The gas extraction mechanism 30 in this embodiment includes a first base 31, an extraction component 32, a reversing component 33 and an air pump 34. The first base 31 is installed in the installation cavity 201; the extraction component 32 is arranged on the first base 31 and connected to the base station sewage tank 22; the reversing component 33 is rotatably arranged on the first base 31 to press the extraction component 32 so that the gas extraction mechanism 30 switches between a preset negative pressure state and a preset positive pressure state; the air pump 34 is connected to the extraction component 32. The reversing component 33 rotates relative to the first base 31, so that the gas extraction mechanism 30 can switch between a preset negative pressure state and a preset positive pressure state, and then the base station sewage tank 22 can be vacuumed or pressurized; the extraction component 32 can suck the gas in the base station sewage tank 22 under the suction action of the air pump 34 and discharge it to the outside, or suck the outside gas into the base station sewage tank 22. When the reversing component 33 presses the pumping component 32 and the gas pumping mechanism 30 is in a preset negative pressure state, the air pump 34 extracts the gas in the base station sewage tank 22 and sucks it into the pumping component 32, and then discharges it to the outside through the pumping component 32, so that negative pressure is formed in the base station sewage tank 22, and then the sewage in the host sewage tank 11 of the host 10 can be quickly sucked into the base station sewage tank 22; when the reversing component 33 presses the pumping component 32 and the gas pumping mechanism 30 is in a preset positive pressure state, the air pump 34 draws the outside gas into through the pumping component 32, and then discharges it into the base station sewage tank 22 through the pumping component 32, so that the base station sewage tank 22 can be pressurized to increase the gas pressure in the base station sewage tank 22, and then the sewage in the base station sewage tank 22 can be discharged to the sewer through the sewer valve 24.

[0050] The air pump 34 in this embodiment has an air suction port 341 and an air exhaust port 342 , and the air suction and exhaust component 32 includes a first air intake pipe 321 , a first air exhaust pipe 322 , a second air intake pipe 323 and a second air exhaust pipe 324 . The two opposite ends of the first air inlet pipe 321 are respectively connected to the base station sewage tank 22 and the air extraction port 341, the two opposite ends of the first exhaust pipe 322 are respectively connected to the exhaust port 342 and the outside, the two opposite ends of the second air inlet pipe 323 are respectively connected to the air extraction port 341 and the outside, and the two opposite ends of the second exhaust pipe 324 are respectively connected to the exhaust port 342 and the base station sewage tank 22; when the gas extraction mechanism 30 is in a preset negative pressure state, the reversing component 33 presses against the second air inlet pipe 323 and the second exhaust pipe 324 to make the second air inlet pipe 323 and the second exhaust pipe 324 in a disconnected state, and the first air inlet pipe 321 and the first exhaust pipe 322 are in a connected state; when the gas extraction mechanism 30 is in a preset positive pressure state, the reversing component 33 presses against the first air inlet pipe 321 and the first exhaust pipe 322 to make the first air inlet pipe 321 and the first exhaust pipe 322 in a disconnected state, and the second air inlet pipe 323 and the second exhaust pipe 324 are in a connected state. A sewage injection pipe 23 and a drain valve 24 are provided in the installation cavity 201. The sewage injection pipe 23 is connected between the sewage injection port 211 and the base station sewage tank 22. A first on-off mechanism 40 is provided on the sewage injection pipe 23. The drain valve 24 is connected between the sewage discharge port 212 and the sewer. A second on-off mechanism 50 is provided on the sewer valve 24. When the gas extraction mechanism 30 is in a preset negative pressure state, the first on-off mechanism 40 is in a connected state, so that the sewage in the host sewage tank 11 is pumped into the base station sewage tank 22 through the sewage discharge port 12, the sewage injection port 211 and the sewage injection pipe 23, and the second on-off mechanism 50 is in a disconnected state; when the gas extraction mechanism 30 is in a preset positive pressure state, the second on-off mechanism 50 is in a connected state, so that the sewage in the base station sewage tank 22 is discharged to the sewer through the sewage discharge port 212 and the drain valve 24, and the first on-off mechanism 40 is in a disconnected state.

[0051] The cleaning device of the present embodiment is used to perform a method of extracting and discharging sewage. The process of the cleaning device in the present embodiment performing negative pressure extraction is as follows: when the gas extraction and exhaust mechanism 30 is in a preset negative pressure state, the reversing component 33 moves to the second air inlet pipe 323 and the second exhaust pipe 324 and presses the second air inlet pipe 323 and the second exhaust pipe 324, thereby disconnecting the second air inlet pipe 323 and the second exhaust pipe 324, while the first air inlet pipe 321 and the first exhaust pipe 322 are not pressed by the reversing component 33 and can connect the air extraction port 341 and the exhaust port 342. At this time, the air pump 34 can be used in cooperation with the first air inlet pipe 321 and the first exhaust pipe 322 to perform a vacuum operation on the base station sewage tank 22, that is, when the air pump 34 is working, the gas in the base station sewage tank 22 is sucked into the first air inlet pipe 321, and then enters the air pump 34 and is transported to the exhaust port 342 through the air suction port 341, and then discharged into the first exhaust pipe 322 through the exhaust port 342, and finally discharged through the first exhaust pipe 322, thereby finally realizing the vacuum operation of the base station sewage tank 22, and effectively improving the suction effect of the base station sewage tank 22 of the base station 20. In the present embodiment, the process of positive-pressure sewage discharge by the cleaning device is as follows: when the gas extraction mechanism 30 is in a preset positive-pressure state, the reversing component 33 moves to the first air inlet pipe 321 and the first exhaust pipe 322 and presses the first air inlet pipe 321 and the first exhaust pipe 322, thereby disconnecting the first air inlet pipe 321 and the first exhaust pipe 322, while the second air inlet pipe 323 and the second exhaust pipe 324 are not pressed by the reversing component 33 and can connect the air extraction port 341 and the exhaust port 342. At this time, the air pump 34 can be used in conjunction with the second air inlet pipe 323 and the second exhaust pipe 324 to pressurize the base station sewage tank 22. That is, when the air pump 34 is working, the external gas is sucked into the second air inlet pipe 323, then enters the air pump 34 and is transported to the exhaust port 342 through the air suction port 341, and then discharged into the second exhaust pipe 324 through the exhaust port 342, and finally discharged into the base station sewage tank 22 through the second exhaust pipe 324, thereby finally realizing the pressurization operation of the base station sewage tank 22 and effectively improving the discharge capacity of the base station sewage tank 22 of the base station 20.

[0052] The above cleaning device is used to perform the corresponding sewage extraction method. The sewage extraction method provided in the embodiment of the present application is shown in Figures 6 to 10 As shown, the sewage extraction method of the present application will be described in detail below with reference to the accompanying drawings. Specifically, the sewage extraction method includes the following steps:

[0053] Step S10: Setting the pressure accumulation time and sewage pumping time of the host 10.

[0054] Specifically, step S10 includes:

[0055] Determine the sewage water level in the host sewage tank 11;

[0056] A preset negative pressure state value is set according to the sewage water level line in the host sewage tank 11, and a pressure storage time is set according to the preset negative pressure state value combined with the pressure extraction rate of the air pump 34; wherein the preset negative pressure state value includes the maximum negative pressure value of the base station sewage tank 22 or the negative pressure value corresponding to the sewage water level line;

[0057] The sewage pumping time is set according to the sewage water level line of the main machine sewage tank 11 and the pressure accumulation time.

[0058] In this embodiment, the sewage water level line in the host sewage tank 11 is obtained by a water level sensor built into the host sewage tank 11. For example, the preset negative pressure state value set according to the sewage water level line in the host sewage tank 11 cannot pump all the sewage in the host sewage tank 11 into the base station sewage tank 22 at one time, so the suction is performed in multiple times. Therefore, it is necessary to perform multiple pumping and sewage extraction on the base station sewage tank 22. For example, the time for the first pumping is set to 10s, the corresponding time for the first sewage extraction is 5s, the time for the second pumping is 8s, and the time for the second sewage extraction is 3s. First, switch to the negative pressure mode through the gas extraction mechanism 30, then close the drain valve 24 for two seconds, and control the air pump 34 to accumulate pressure for 10 seconds through the gas circuit switching mode to complete the first pumping of the base station sewage tank 22, and then open the host 10 sewage valve and the pressure storage valve to start sewage pumping. After the sewage pumping time is 5 seconds, the pressure of the base station sewage tank 22 returns to normal, and close the pressure storage valve again to pump the base station sewage tank 22 for 8 seconds to complete the second pumping, and then open the pressure storage valve to pump the base station sewage tank 22 for 3 seconds. The sewage in the host sewage tank 11 is completely sucked into the base station sewage tank 22.

[0059] In the above embodiment, the preset negative pressure state value, pressure accumulation time and sewage pumping time are set according to the sewage water level line in the host sewage tank 11, which can ensure that the sewage transfer process is more accurate and efficient, avoid unnecessary energy waste and time consumption, and improve the overall work efficiency. By accurately controlling the pumping rate and pressure accumulation time of the air pump 34, the work intensity can be adjusted according to actual needs, avoiding excessive pumping or long-term ineffective operation, thereby significantly reducing energy consumption. Reasonable negative pressure state can ensure that sewage flows smoothly during the transfer process and reduce the impact and wear on the equipment caused by pressure fluctuations. The preset negative pressure state value of the base station sewage tank 22 includes the maximum negative pressure value or the negative pressure value corresponding to the water level, which can more accurately control the sewage transfer process and ensure that efficient and stable sewage transfer can be achieved under different sewage volumes, thereby further improving the efficiency of sewage treatment and the overall performance of the system.

[0060] Step S20: Control the drain valve 24 of the base station sewage tank 22 and the pressure storage valve on the base station sewage tank 22 for connecting to the host sewage tank 11 to close, and convert the base station sewage tank 22 to a preset negative pressure state through the gas exhaust mechanism 30.

[0061] Specifically, step S20 includes:

[0062] Control the drain valve 24 of the base station sewage tank 22 and the pressure storage valve on the base station sewage tank 22 for connecting to the host sewage tank 11 to close;

[0063] Switching the gas circuit of the air pump 34 to a negative pressure mode through the gas extraction mechanism 30;

[0064] The base station sewage tank 22 is depressurized by the air pump 34 switched to negative pressure mode;

[0065] When the corresponding set pressure accumulation time is reached, the air pump 34 is turned off to allow the base station sewage tank 22 to reach a preset negative pressure state.

[0066] In the above embodiment, the gas circuit of the air pump 34 is accurately switched to the negative pressure mode through the gas extraction mechanism 30, and the base station sewage tank 22 is extracted and pressurized accordingly, so that the negative pressure state in the sewage tank can reach the preset value, which is conducive to the smooth progress of the subsequent sewage transfer process. During the extraction process, the air pump 34 is turned off according to the preset pressure storage time, so that the base station sewage tank 22 reaches the preset negative pressure state, avoiding excessive or insufficient extraction, improving the efficiency of sewage transfer, and ensuring the stability of the system. By accurately controlling the extraction time and negative pressure state, the unnecessary operation time of the air pump 34 is reduced, thereby reducing energy consumption, which has a significant energy-saving effect for the long-term cleaning system. Reasonable negative pressure state setting and extraction time control can reduce the impact and wear on the base station sewage tank 22 and its related equipment, thereby extending the service life of the equipment. It can adapt to the changes in demand under different sewage volumes and different working conditions, and by adjusting parameters such as the preset negative pressure state value and pressure storage time, it is ensured that the system can maintain an efficient and stable operating state under various conditions.

[0067] Step S30: Control the sewage valve and the pressure storage valve of the host 10 to open simultaneously, so that the sewage in the host sewage tank 11 is sucked into the base station sewage tank 22 under the negative pressure of the base station sewage tank 22 .

[0068] Specifically, step S30 includes:

[0069] Open the sewage valve and the pressure storage valve of the host 10 at the same time, so that the sewage in the host sewage tank 11 is sucked into the base station sewage tank 22 under the preset negative pressure state of the base station sewage tank 22 until the pressure storage time is reached;

[0070] If the air pump 34 recovers to a normal pressure value and sewage is still present in the host sewage tank 11 , steps S1 to S2 are iteratively executed until all the sewage in the host sewage tank 11 enters the base station sewage tank 22 .

[0071] Furthermore, the sewage valve of the host 10 includes a variety of opening control logics, and the opening control logics at least include opening on demand, continuous opening and staged opening.

[0072] In this embodiment, the sewage valve and the pressure storage valve of the host 10 are first opened at the same time. The sewage valve of the host 10 is responsible for connecting the host sewage tank 11 with the suction base station sewage tank 22, while the pressure storage valve is used to maintain the pressure state of the base station sewage tank 22 to ensure that the sewage can flow smoothly. When the sewage valve and the pressure storage valve of the host 10 are opened, the sewage in the host sewage tank 11 is sucked under the preset negative pressure state of the base station sewage tank 22. Under the action of the negative pressure of the base station sewage tank 22, the sewage in the host sewage tank 11 flows from the host sewage tank 11 through the host 10 sewage valve into the base station sewage tank 22. Until the preset pressure storage time is reached or the sewage in the host sewage tank 11 is completely sucked out. If the air pump 34 fails to fully recover to the normal pressure value within the pressure accumulation time, or there is still unsucked sewage in the host sewage tank 11, iteratively execute steps S20 to S30. Iteratively executing steps S20 to S30 means repeatedly executing the two steps of pumping the base station sewage tank 22 to create or maintain a preset negative pressure state (step S20) and pumping the sewage in the host sewage tank 11 into the base station sewage tank 22 (step S30). The sewage pumping time and pressure accumulation time executed each time may be different. Specifically, when the air pump 34 recovers to the normal pressure value (i.e., it is no longer in a state of providing additional negative pressure for sewage pumping) and there is still sewage in the host sewage tank 11, the base station sewage tank 22 is restarted to create a negative pressure state again, and the sewage in the host sewage tank 11 is continuously pumped until all the sewage in the host sewage tank 11 is completely pumped into the base station sewage tank 22. The host 10 sewage valve includes a variety of opening control logics, and opening on demand is to open the sewage valve according to real-time needs or preset conditions. For example, when it is detected that the main sewage tank 11 reaches a certain water level, the sewage valve is automatically opened for suction. Continuous opening means that during the sewage suction process, the sewage valve remains open until a specific condition is met, such as the sewage suction is completed. Staged opening means that the sewage valve opening process is divided into multiple stages according to the progress of sewage suction. Each stage has a different degree of opening and duration to meet different suction needs.

[0073] In the above embodiment, by simultaneously opening the sewage valve and the pressure storage valve of the host 10 and utilizing the negative pressure state of the sewage tank 22 of the base station, rapid and efficient sewage suction is achieved, which helps to reduce the retention time of sewage in the host sewage tank 11 and prevents sewage from corroding the host sewage tank 11. The multiple opening control logics of the sewage valve of the host 10 provide a more flexible operation mode, which can be selected and adjusted according to different scenarios and needs to optimize the sewage suction effect and equipment performance.

[0074] Step S40: The base station sewage tank 22 is converted to a preset positive pressure state through the gas exhaust mechanism 30 , and all sewage in the base station sewage tank 22 is discharged through the drain valve 24 .

[0075] Specifically, step S40 includes:

[0076] When all the sewage in the host sewage tank 11 is sucked into the base station sewage tank 22, the base station sewage tank 22 is converted to a preset positive pressure state through the gas extraction mechanism 30;

[0077] Determine the sewage water level in the sewage tank 22 of the base station;

[0078] Set the corresponding sewage discharge time according to the sewage water level in the sewage tank 22 of the base station;

[0079] The pressure storage valve is closed and the drain valve 24 is opened synchronously, so that the sewage in the sewage tank 22 of the base station is discharged through the drain valve 24 within the sewage discharge time.

[0080] Furthermore, the sewage water level line in the base station sewage tank 22 is obtained by a water level sensor built into the base station sewage tank 22. For example, the sewage discharge time set according to the sewage water level line in the base station sewage tank 22 is 10s. After the base station sewage tank 22 completes sewage pumping, the pressure storage valve is closed, the drain valve 24 is opened for two seconds, and the base station sewage tank 22 is switched to a preset positive pressure state through the gas pumping mechanism 30. Then, the sewage is discharged for 10s, and the sewage in the base station sewage tank 22 is completely discharged through the drain valve 24. The drain valve 24 is connected to an external waterway, and all the discharged sewage is discharged into the external sewer.

[0081] In the above embodiment, after all the sewage in the host sewage tank 11 is sucked into the base station sewage tank 22, the base station sewage tank 22 is quickly converted from a negative pressure state to a positive pressure state through the gas extraction mechanism 30, thereby realizing an efficient and accurate conversion of the negative pressure state of the base station sewage tank 22, and preparing for the subsequent sewage discharge. The corresponding sewage discharge time is set according to the sewage water level line in the base station sewage tank 22 to ensure that the sewage is discharged at the best time, which not only avoids the problems that may be caused by sewage retention, but also saves energy and time. The pressure storage valve is closed synchronously and the drain valve 24 is opened to ensure that the sewage is discharged smoothly within the set sewage discharge time, thereby improving the discharge efficiency.

[0082] Furthermore, the base station sewage tank 22 is converted to a preset positive pressure state through the gas extraction mechanism 30, including:

[0083] Switching the gas circuit of the gas pump 34 to a positive pressure mode through the gas extraction mechanism 30;

[0084] Pressurizing the base station sewage tank 22 by the air pump 34 after switching to the positive pressure mode;

[0085] When the air pump 34 reaches the preset positive pressure value, the air pump 34 stops working, so that the base station sewage tank 22 reaches the preset positive pressure state.

[0086] The positive pressure value corresponding to the preset positive pressure state can be set to just squeeze out all the sewage in the base station sewage tank 22 or the maximum positive pressure value of the base station sewage tank 22. In the above embodiment, the gas pumping mechanism 30 can accurately control the air circuit of the air pump 34 to switch to the positive pressure mode, ensuring the accuracy and reliability of the air circuit switching, and avoiding operational errors or equipment damage caused by the confusion of the air circuit. After switching to the positive pressure mode, the air pump 34 starts to pressurize the base station sewage tank 22. The pressurization process can be accurately controlled to ensure that the base station sewage tank 22 can reach the preset positive pressure value, which helps to maintain the stability and reliability of the system. By converting the base station sewage tank 22 to a positive pressure state, the sewage discharge process can be accelerated. In a positive pressure state, sewage is more easily pushed out of the sewage tank, thereby reducing the discharge time and improving the sewage discharge efficiency. The positive pressure state also helps to reduce the residue of sewage in the sewage tank. Through an appropriate positive pressure value, it can be ensured that the sewage is completely discharged, avoiding the problem of bacterial growth and odor caused by residue. Under positive pressure, the pressure in the sewage tank is higher than the external environment, which helps prevent sewage from flowing back into the cleaning device or other components. This protects the cleanliness and service life of the equipment. By accurately controlling the pressurization process, equipment damage caused by excessive pressure can be avoided. The gas extraction mechanism 30 and the pressurization control mechanism work together to ensure the safety and stability of the pressurization process.

[0087] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0088] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for extracting sewage, It is characterized in that include: Control the drain valve of the base station sewage tank and the pressure storage valve on the base station sewage tank for connecting to the host sewage tank to close, and convert the base station sewage tank to a preset negative pressure state through the gas extraction mechanism; The host sewage valve and the pressure storage valve are controlled to open simultaneously, so that the sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure of the base station sewage tank.

2. The method for extracting dirt from a cleaning device according to claim 1, It is characterized in that Before the drain valve of the base station sewage tank and the pressure storage valve on the base station sewage tank for connecting to the host sewage tank are closed, the method further includes: Determine the sewage water level in the main engine sewage tank; A preset negative pressure state value is set according to the sewage water level in the main engine sewage tank, and a pressure storage time is set according to the preset negative pressure state value combined with the pressure extraction rate of the air pump; The sewage pumping time is set according to the sewage water level line of the main engine sewage tank and the pressure accumulation time.

3. The sewage extraction method according to claim 1 or 2, It is characterized in that The preset negative pressure state value includes the maximum negative pressure value of the sewage tank of the base station or the negative pressure value corresponding to the sewage water level line.

4. The sewage extraction method according to claim 1 or 2, It is characterized in that The step of converting the base station sewage tank to a preset negative pressure state by means of a gas extraction mechanism comprises: Switch the gas circuit of the air pump to negative pressure mode through the gas extraction mechanism; Pumping pressure from the sewage tank of the base station by switching the air pump to negative pressure mode; When the corresponding set pressure accumulation time is reached, the air pump is turned off to allow the base station sewage tank to reach a preset negative pressure state.

5. The sewage extraction method according to claim 1 or 2, It is characterized in that The step controls the host sewage valve and the pressure storage valve to open simultaneously, so that the sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure of the base station sewage tank, and includes: Opening the host sewage valve and the pressure storage valve at the same time, so that the sewage in the host sewage tank is sucked into the base station sewage tank under the preset negative pressure state of the base station sewage tank until the pressure storage time is reached; If the air pump returns to a normal pressure value and there is still sewage in the host sewage tank, the steps of pumping pressure and sewage from the base station sewage tank are iteratively performed until all the sewage in the host sewage tank enters the base station sewage tank.

6. The sewage extraction method according to claim 1, It is characterized in that The host sewage valve includes a variety of opening control logics, and the opening control logics include at least opening on demand, continuous opening and staged opening.

7. The sewage extraction method according to claim 1, It is characterized in that After the host sewage valve and the pressure storage valve are controlled to open simultaneously so that the sewage in the host sewage tank is sucked into the base station sewage tank under the negative pressure of the base station sewage tank, the method further includes: When all the sewage in the host sewage tank is sucked into the base station sewage tank, the base station sewage tank is converted to a preset positive pressure state through the gas extraction mechanism; The pressure storage valve is closed and the drain valve is opened synchronously, so that the sewage in the sewage tank of the base station is discharged through the drain valve within the sewage discharge time.

8. The sewage extraction method according to claim 7, It is characterized in that Before the synchronous closing of the pressure storage valve and the opening of the drainage valve so that the sewage in the sewage tank of the base station is discharged through the drainage valve, the method further includes: Determining a sewage water level in the sewage tank of the base station; The corresponding sewage discharge time is set according to the sewage water level line in the sewage tank of the base station.

9. The sewage extraction method according to claim 8, It is characterized in that The method of converting the base station sewage tank to a preset positive pressure state by means of a gas extraction mechanism comprises: Switching the gas circuit of the air pump to a positive pressure mode through the gas extraction mechanism; Pressurizing the sewage tank of the base station by means of the air pump after switching to the positive pressure mode; When the air pump reaches a preset positive pressure value, the air pump stops working, so that the sewage tank of the base station reaches a preset positive pressure state.

10. A cleaning device, It is characterized in that The cleaning device is used to perform the dirt extraction method according to any one of claims 1 to 9.

Images