Cleaning device

Abstract

The invention belongs to the technical field of fixed liquid drainage, and discloses a cleaning device. The cleaning device comprises a reaction tank, a circulating assembly and a fixed-row assembly, the reaction tank comprises a main tank and an auxiliary tank, the auxiliary tank is arranged on the periphery of the main tank in a surrounding mode, the main tank is used for containing liquid medicine and a to-be-cleaned part, an overflow opening is formed in the upper portion of the main tank, and the overflow opening is configured to enable a mixed solution obtained after the to-be-cleaned part and the liquid medicine react to overflow into the auxiliary tank; the input end of the circulating assembly is communicated with the auxiliary tank, the output end of the circulating assembly is communicated with the main tank, and the circulating assembly is configured to convey the mixed solution in the auxiliary tank back into the main tank; the input end of the fixed-discharge assembly is communicated with the auxiliary tank, the output end of the fixed-discharge assembly is communicated with the outside, and the fixed-discharge assembly is configured to quantitatively discharge the mixed solution in the auxiliary tank within the preset time after the reaction starts, so that the service life of the liquid medicine in the main tank can be prolonged, and the consumption of the liquid medicine can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of liquid arrangement, and in particular to a cleaning device. Background Art

[0002] The main components of solar cells are silicon and silicon dioxide, but they are mixed with many metal impurities and organic matter, which will affect the efficiency and life of photovoltaic power generation. Therefore, the cells need to be wet cleaned during the processing process.

[0003] The existing wet cleaning equipment includes a main tank and a sub-tank. The main tank contains liquid medicine for cleaning battery cells. Battery cells are placed in a basket, and the basket containing battery cells is placed in the main tank. During the reaction process, the liquid medicine in the main tank reacts with the battery cells to produce waste liquid. The waste liquid and unreacted liquid medicine form a mixed solution that overflows into the sub-tank. The mixed solution in the sub-tank is recycled to the main tank through a circulation pipeline. After the reaction in the main tank is completed, the fixed discharge adjustment valve is opened to discharge part of the liquid medicine. Since the liquid medicine in the main tank and the waste liquid are almost completely mixed after the reaction, the proportion of liquid medicine in this part of the mixed solution is high and the proportion of waste liquid is low, resulting in a short service life of the liquid medicine in the main tank. The next time the battery cells are cleaned, more liquid medicine needs to be added to the main tank.

[0004] Therefore, a cleaning device is urgently needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a cleaning device which can reduce the proportion of liquid medicine in a mixed solution discharged at a certain time, so as to increase the service life of the liquid medicine and reduce the consumption of the liquid medicine.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A cleaning device, comprising:

[0008] The reaction tank includes a main tank and a sub-tank, wherein the sub-tank is arranged around the periphery of the main tank, the main tank is used to contain the liquid medicine and the object to be cleaned, and an overflow port is arranged above the main tank, wherein the overflow port is configured to allow the mixed solution after the object to be cleaned and the liquid medicine react to overflow into the sub-tank;

[0009] a circulation component, wherein an input end of the circulation component is communicated with the auxiliary tank, an output end of the circulation component is communicated with the main tank, and the circulation component is configured to transport the mixed solution in the auxiliary tank back to the main tank;

[0010] The fixed row component has an input end connected to the auxiliary tank, an output end connected to the outside, and is configured to discharge the mixed solution in the auxiliary tank quantitatively at a preset time after the reaction starts.

[0011] Preferably, the row-fixed component includes a first switch valve and a row-fixed pipe. The bottom wall of the sub-tank is provided with a first opening. One end of the row-fixed pipe is connected to the first opening, and the other end is connected to the outside. The first switch valve is arranged on the row-fixed pipe, and the first switch valve can close or open the row-fixed pipe.

[0012] Preferably, the fixed row assembly further comprises a metering pump, which is arranged on the fixed row pipeline and is arranged downstream of the first switch valve along the liquid flow direction in the fixed row pipeline.

[0013] Preferably, the row assembly further comprises a filter screen, which is arranged in the auxiliary tank and covers the first opening.

[0014] Preferably, the bottom wall of the auxiliary tank is also provided with a second opening, and the bottom wall of the main tank is provided with a third opening. The circulation component includes a circulation pump and a circulation pipe, one end of the circulation pipe is connected to the second opening, and the other end is connected to the third opening. The circulation pump is arranged on the circulation pipe.

[0015] Preferably, the cleaning device further comprises a liquid level meter, which is configured to monitor the liquid level of the sub-tank.

[0016] Preferably, the cleaning device further comprises an overflow pipe, the side wall of the auxiliary tank is provided with a fourth opening, the height of the fourth opening is lower than the height of the overflow port, one end of the overflow pipe is connected to the fourth opening, and the other end is connected to the outside.

[0017] Preferably, the cleaning device also includes a second switch valve and a discharge pipe, one end of the discharge pipe is connected to the main tank, and the other end is connected to the outside, the second switch valve is arranged on the discharge pipe, and the second switch valve can open or close the discharge pipe.

[0018] Preferably, the cleaning device further comprises a check valve, which is arranged downstream of the second switch valve along the flow direction of the liquid in the discharge pipe.

[0019] Preferably, a confluence is provided on the discharge pipe, and the confluence is arranged between the check valve and the second switch valve, and the output end of the overflow pipe and the output end of the fixed-discharge assembly are both connected to the confluence.

[0020] Beneficial effects:

[0021] The present invention provides a cleaning device, wherein the workpiece to be cleaned is placed in a main tank containing a chemical liquid, the chemical liquid reacts with the workpiece to be cleaned to generate waste liquid, a mixed solution of the waste liquid and the chemical liquid flows through an overflow port on the main tank to a sub-tank surrounding the main tank, the mixed solution in the sub-tank is circulated back to the main tank through a circulation component connected to the sub-tank, the upper mixed solution overflows into the sub-tank again, and at a preset time after the reaction between the workpiece to be cleaned and the chemical liquid begins, the mixed solution in the sub-tank is quantitatively discharged, for example, during a time period when the reaction between the workpiece to be cleaned and the chemical liquid is strongest, at this time, the proportion of chemical liquid in the mixed solution overflowing from the main tank to the sub-tank is reduced, and the proportion of waste liquid is increased, the fixed discharge component is turned on, and part of the mixed solution is discharged from the sub-tank, and at the beginning of the next cleaning, only part of the new chemical liquid needs to be added to the main tank, thereby increasing the service life of the chemical liquid in the main tank and reducing the consumption of chemical liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a cleaning device provided in an embodiment of the present invention.

[0023] In the figure:

[0024] 1. reaction tank; 11. main tank; 111. third opening; 12. auxiliary tank; 121. first opening; 122. second opening; 123. fourth opening;

[0025] 2. Fixed-discharge assembly; 21. First switch valve; 22. Metering pump; 23. Filter; 24. Fixed-discharge pipeline;

[0026] 3. Liquid level meter;

[0027] 4. Circulation assembly; 41. Circulation pump; 42. Circulation adjustment valve; 43. Circulation pipeline;

[0028] 5. Overflow pipe;

[0029] 61. second switch valve; 62. discharge pipe; 621. confluence port;

[0030] 7. Check valve. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] This embodiment provides a cleaning device, such as Figure 1 As shown, the cleaning device includes a reaction tank 1, a circulation component 4 and a fixed row component 2. The reaction tank 1 includes a main tank 11 and a sub-tank 12. The sub-tank 12 is arranged around the periphery of the main tank 11. The main tank 11 is used to contain the drug solution and the parts to be cleaned. An overflow port is provided above the main tank 11. The overflow port is used to allow the mixed solution after the reaction of the parts to be cleaned and the drug solution to overflow into the sub-tank 12. The input end of the circulation component 4 is connected to the sub-tank 12, and the output end of the circulation component 4 is connected to the main tank 11. The circulation component 4 is used to transport the mixed solution in the sub-tank 12 back to the main tank 11. The input end of the fixed row component 2 is connected to the sub-tank 12, and the output end of the fixed row component 2 is connected to the outside. The fixed row component 2 is used to quantitatively discharge the mixed solution in the sub-tank 12 at a preset time after the start of the reaction.

[0036] The parts to be cleaned are placed in the main tank 11 containing the liquid medicine, and the liquid medicine reacts with the parts to be cleaned to generate waste liquid. The mixed solution of the waste liquid and the liquid medicine flows through the overflow port on the main tank 11 to the sub-tank 12 surrounding the main tank 11, and the mixed solution in the sub-tank 12 is circulated back to the main tank 11 through the circulation component 4 connected to the sub-tank 12, and the upper mixed solution overflows into the sub-tank 12 again. At a preset time after the reaction between the parts to be cleaned and the liquid medicine begins, the mixed solution in the sub-tank 12 is quantitatively discharged, for example, during the time period when the reaction between the parts to be cleaned and the liquid medicine is strongest, at this time, the proportion of liquid medicine in the mixed solution overflowing from the main tank 11 to the sub-tank 12 is reduced, and the proportion of waste liquid is increased, the fixed discharge component 2 is turned on, and part of the mixed solution is discharged from the sub-tank 12. At the beginning of the next cleaning, only part of the new liquid medicine needs to be added to the main tank 11, thereby increasing the service life of the liquid medicine in the main tank 11 and reducing the consumption of liquid medicine.

[0037] like Figure 1 As shown, the fixed-discharge assembly 2 includes a first switch valve 21 and a fixed-discharge pipe 24. The bottom wall of the auxiliary tank 12 is provided with a first opening 121. One end of the fixed-discharge pipe 24 is connected to the first opening 121, and the other end is connected to the outside. The first switch valve 21 is arranged on the fixed-discharge pipe 24, and the first switch valve 21 can close or open the fixed-discharge pipe 24. Opening the first switch valve 21 can perform fixed-discharge of the mixed solution in the auxiliary tank 12 during the reaction process. For example, during the time period when the reaction is the strongest, relative to the mixed solution after the complete reaction, the proportion of waste liquid in the mixed solution increases, and the proportion of liquid medicine decreases, thereby reducing the discharge amount of liquid medicine. When the next cleaning starts, only part of the new liquid medicine needs to be added to the main tank 11, thereby increasing the service life of the liquid medicine in the main tank 11 and reducing the consumption of liquid medicine.

[0038] In order to control the discharge of a specified amount of mixed solution at a predetermined time point, the row assembly 2 can be controlled. Figure 1 As shown, the fixed row component 2 also includes a metering pump 22, which is arranged on the fixed row pipe 24. Along the liquid flow direction in the fixed row pipe 24, the metering pump 22 is arranged downstream of the first switch valve 21. On the one hand, the first switch valve 21 can always remain in an open state, and the mixed solution can be stored in the fixed row pipe 24 between the auxiliary tank 12 and the metering pump 22. When the metering pump 22 is turned on, the mixed solution is discharged from the auxiliary tank 12, for example, to the waste liquid collection tank; on the other hand, the metering pump 22 can adjust the fixed row flow rate, open within a preset time, control the rate and time of the mixed solution discharge, and then control the discharge amount of the mixed solution. The fixed row component 2 is simple and easy to operate, and the mixed solution is accurately transported, meeting the strict production process requirements. In addition, when the metering pump 22 is abnormal, the first switch valve 21 can be closed, and the metering pump 22 can be repaired and replaced, that is, the design of this structure is also convenient for maintaining the metering pump 22.

[0039] Specifically, the metering pump 22 is electrically connected to an electronic control component (not shown in the figure). When setting the discharge, the time point for starting the metering pump 22, the total time for starting and the total volume of the mixed solution to be discharged are set in the electronic control component according to the reaction conditions in the main tank 11. The flow rate of the mixed solution in the discharge pipeline 24 is controlled by the metering pump 22, and the metering pump 22 can be turned on at multiple time points during the reaction process, and the time of starting is adjustable, which improves the flexibility of the discharge operation of the cleaning device.

[0040] Optionally, the metering pump 22 can be a plunger metering pump, a piston metering pump, a mechanical diaphragm metering pump or a hydraulic diaphragm metering pump, which is not specifically limited here. It can enable the cleaning device to discharge the mixed solution in different amounts and at different times multiple times during the reaction, achieve precise regulation of the flow rate of the mixed solution, and ensure that the error of the amount discharged each time is within 0.1%-1%.

[0041] like Figure 1 As shown, the row assembly 2 also includes a filter 23, which is arranged in the sub-tank 12 and covers the first opening 121. On the one hand, the filter 23 effectively reduces the entry of debris into the row pipe 24 to avoid blockage of the row pipe 24; on the other hand, the filter 23 can effectively eliminate the bubbles in the sub-tank 12 to avoid the bubbles from entering the metering pump 22, thereby avoiding affecting the normal operation of the metering pump 22 and causing inaccurate row, thereby improving the reliability of the cleaning device.

[0042] like Figure 1 As shown, the bottom wall of the auxiliary tank 12 is further provided with a second opening 122, and the bottom wall of the main tank 11 is provided with a third opening 111. The circulation assembly 4 includes a circulation pump 41 and a circulation pipe 43. One end of the circulation pipe 43 is connected to the second opening 122, and the other end is connected to the third opening 111. The circulation pump 41 is arranged on the circulation pipe 43. On the one hand, the mixed solution in the auxiliary tank 12 flows through the circulation pipe 43, and is subjected to the force of the circulation pump 41, and then circulates to the main tank 11, so that the liquid medicine can be recycled, thereby extending the service life of the liquid medicine; on the other hand, the mixed solution flowing in the circulation pipe 43 is subjected to the force of the circulation pump 41, so that the mixed solution can flow upward from the bottom of the main tank 11, so that the liquid medicine in the mixed solution fully reacts with the parts to be cleaned, and the waste liquid in the lower layer is lifted to the upper layer, and the mixed solution of the waste liquid and the liquid medicine in the upper layer overflows into the auxiliary tank 12, and is discharged to the outside of the auxiliary tank 12, such as the waste liquid collection tank, through the fixed discharge pipe 24 connected to the auxiliary tank 12.

[0043] In this embodiment, three third openings 111 are provided on the bottom wall of the main tank 11, and the circulation pipe 43 forms three branches at the lower end of the main tank 11, which are respectively connected to the three third openings 111, so that the mixed solutions at different positions in the main tank 11 can be subjected to an upward force, thereby enabling the cleaning device to better realize the circulation and fixed discharge work.

[0044] like Figure 1 As shown, the circulation component 4 also includes a circulation adjustment valve 42, and the circulation adjustment valve 42 is arranged on the circulation pipeline 43. The circulation adjustment valve 42 can close or open the circulation pipeline 43. When the circulation pump 41 has an abnormality, the circulation adjustment valve 42 can be closed, and the circulation pump 41 can be inspected and replaced. That is, the structure is designed to facilitate the maintenance of the circulation pump 41.

[0045] like Figure 1 As shown, the cleaning device also includes a liquid level gauge 3, which is used to monitor the liquid level of the auxiliary tank 12. The liquid level gauge displays the liquid level height of the auxiliary tank 12 to prevent the liquid level in the auxiliary tank 12 from being too low, thereby avoiding poor circulation. In this embodiment, the liquid level gauge 3 is a differential pressure liquid level gauge, which measures the high and low pressure difference, and then converts it into a current signal by a conversion component and transmits it to an electrical component in the control room. The size of the differential pressure represents the size of the liquid level height. The differential pressure value between the gas and liquid phases can be measured with a differential pressure liquid level gauge to know the liquid level in the auxiliary tank 12. Optionally, in other embodiments, the liquid level gauge 3 can be a radar level gauge, a capacitive level gauge, a buoy level gauge, a float level gauge, etc., which are not specifically limited here.

[0046] like Figure 1 As shown, the cleaning device also includes an overflow pipe 5, and a fourth opening 123 is provided on the side wall of the auxiliary tank 12. The height of the fourth opening 123 is lower than the height of the overflow port. One end of the overflow pipe 5 is connected to the fourth opening 123, and the other end is connected to the outside. On the one hand, it prevents the auxiliary tank 12 from having too much mixed solution, and the auxiliary tank 12 cannot hold it, and then the mixed solution overflows the auxiliary tank 12; on the other hand, it prevents the height of the mixed solution in the auxiliary tank 12 from being higher than the height of the mixed solution in the main tank 11, and avoids the mixed solution in the auxiliary tank 12 from flowing back and affecting the circulation work.

[0047] like Figure 1 As shown, the cleaning device further includes a second switch valve 61 and a discharge pipe 62. One end of the discharge pipe 62 is connected to the main tank 11, and the other end is connected to the outside. The second switch valve 61 is arranged on the discharge pipe 62, and the second switch valve 61 can open or close the discharge pipe 62. When the reaction is completely completed and the liquid medicine is completely ineffective, the second switch valve 61 is opened to discharge all the mixed solution in the main tank 11.

[0048] like Figure 1 As shown, the cleaning device also includes a check valve 7, which is arranged downstream of the second switch valve 61 along the flow direction of the liquid in the discharge pipe 62 to prevent the mixed solution in the discharge pipe 62 from flowing back, thereby improving the reliability of the cleaning device.

[0049] like Figure 1As shown, a confluence port 621 is provided on the discharge pipe 62, and the confluence port 621 is arranged between the check valve 7 and the second switch valve 61. The output end of the overflow pipe 5 and the output end of the fixed discharge pipe 24 are both connected to the confluence port 621. The waste liquid can be discharged into the waste liquid collection tank outside the cleaning device through the same discharge pipe 62, which simplifies the structure of the pipeline and can prevent the mixed solution from flowing back during fixed discharge, and when the mixed solution in the auxiliary tank 12 overflows to the overflow pipe 5, the mixed solution can be prevented from flowing back, thereby improving the reliability of the cleaning device.

[0050] By way of example, taking the cleaning of a certain type of battery cell as an example, the cleaning process of the cleaning device provided in this embodiment is described in detail:

[0051] According to the cleaning requirements, the volume of the reaction tank 1 is set to 700L, 6.8L of sodium hydroxide and 3.3L of additives are placed in the main tank 11, and the remaining capacity of the reaction tank 1 is placed in pure water;

[0052] The battery cells to be cleaned are placed in the main tank 11. After about 5 seconds, the battery cells begin to react with the chemical solution, and a violent reaction begins at 20 seconds, and the violent reaction continues until about 200 seconds, and the reaction is basically completed at 330 seconds. According to the reaction time, the first scheduled discharge starts at 30 seconds and discharges for 150 seconds, that is, the scheduled discharge ends at 180 seconds, and 5L of mixed solution can be discharged. The second scheduled discharge starts at 200 seconds and discharges for 80 seconds, and 2L of mixed solution can be discharged. In other embodiments, the opening time of the scheduled discharge component 2 and the discharge volume of the scheduled discharge component 2 each time can be adaptively changed according to actual production needs, and there is no specific limitation on the opening time point, time period and scheduled discharge volume.

[0053] The main component of the waste liquid generated by the reaction in this embodiment is sodium silicate. If the waste liquid is not discharged during the cleaning process, the mixed solution is discharged after the cleaning work is completely completed, and the ratio of the waste liquid to the liquid medicine is about 2:10. The cleaning device in this embodiment quantitatively discharges the mixed solution in the auxiliary tank 12 at a preset time after the start of the reaction. The ratio of the waste liquid to the liquid medicine in the mixed solution discharged from the auxiliary tank 12 each time is about 4:6. Compared with the discharge method of the prior art of fixed discharge after the reaction is completed, the proportion of the liquid medicine in the discharged mixed solution is greatly reduced, and the service life of the liquid medicine is extended.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cleaning device, characterized in that: include: The reaction tank (1) comprises a main tank (11) and a sub-tank (12), wherein the sub-tank (12) is arranged around the periphery of the main tank (11), the main tank (11) is used to contain a liquid medicine and a workpiece to be cleaned, an overflow port is arranged above the main tank (11), and the overflow port is configured to allow a mixed solution after the workpiece to be cleaned and the liquid medicine to react to overflow into the sub-tank (12); a circulation component (4), wherein an input end of the circulation component (4) is in communication with the auxiliary tank (12), an output end of the circulation component (4) is in communication with the main tank (11), and the circulation component (4) is configured to transport the mixed solution in the auxiliary tank (12) back to the main tank (11); A row assembly (2), wherein the input end of the row assembly (2) is connected to the auxiliary tank (12), and the output end of the row assembly (2) is connected to the outside, and the row assembly (2) is configured to discharge the mixed solution in the auxiliary tank (12) in a quantitative manner at a preset time after the start of the reaction.

2. The cleaning device according to claim 1, characterized in that: The row-fixing component (2) comprises a first switch valve (21) and a row-fixing pipe (24); the bottom wall of the auxiliary tank (12) is provided with a first opening (121); one end of the row-fixing pipe (24) is connected to the first opening (121), and the other end is connected to the outside; the first switch valve (21) is arranged on the row-fixing pipe (24); and the first switch valve (21) can close or open the row-fixing pipe (24).

3. The cleaning device according to claim 2, characterized in that: The fixed row assembly (2) further comprises a metering pump (22), wherein the metering pump (22) is arranged on the fixed row pipe (24), and along the liquid flow direction in the fixed row pipe (24), the metering pump (22) is arranged downstream of the first switch valve (21).

4. The cleaning device according to claim 2, characterized in that: The row-fixing assembly (2) further comprises a filter screen (23), wherein the filter screen (23) is arranged in the auxiliary tank (12) and covers the first opening (121).

5. The cleaning device according to claim 1, characterized in that: The bottom wall of the auxiliary tank (12) is also provided with a second opening (122), the bottom wall of the main tank (11) is provided with a third opening (111), the circulation component (4) comprises a circulation pump (41) and a circulation pipe (43), one end of the circulation pipe (43) is in communication with the second opening (122), and the other end is in communication with the third opening (111), and the circulation pump (41) is arranged on the circulation pipe (43).

6. The cleaning device according to claim 1, characterized in that: The cleaning device further comprises a liquid level meter (3), wherein the liquid level meter (3) is configured to monitor the liquid level of the auxiliary tank (12).

7. The cleaning device according to any one of claims 1 to 6, characterized in that: The cleaning device further comprises an overflow pipe (5), a side wall of the auxiliary tank (12) is provided with a fourth opening (123), the height of the fourth opening (123) is lower than the height of the overflow port, one end of the overflow pipe (5) is in communication with the fourth opening (123), and the other end is in communication with the outside.

8. The cleaning device according to claim 7, characterized in that: The cleaning device further comprises a second switch valve (61) and a discharge pipe (62), one end of the discharge pipe (62) being connected to the main tank (11), and the other end being connected to the outside, the second switch valve (61) being arranged on the discharge pipe (62), and the second switch valve (61) being capable of opening or closing the discharge pipe (62).

9. The cleaning device according to claim 8, characterized in that: The cleaning device further comprises a check valve (7), which is arranged downstream of the second switch valve (61) along the flow direction of the liquid in the discharge pipe (62).

10. The cleaning device according to claim 9, characterized in that: The discharge pipe (62) is provided with a confluence port (621), and the confluence port (621) is arranged between the check valve (7) and the second switch valve (61), and the output end of the overflow pipe (5) and the output end of the fixed row component (2) are both in communication with the confluence port (621).

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