Self-cleaning method of sewage tank, sewage tank, cleaning equipment and cleaning base station

Abstract

The invention provides a self-cleaning method of a sewage tank, the sewage tank, cleaning equipment and a cleaning base station, and the self-cleaning method comprises the following self-cleaning processes: controlling a sewage outlet to be opened so as to drain sewage in a sewage cavity, and controlling the sewage outlet to be closed; the self-cleaning mechanism is controlled to be started, and first spraying is conducted on the cavity wall of the sewage cavity; when a first specified condition is met, the self-cleaning mechanism is controlled to stop first spraying, and the drain outlet is controlled to be opened; wherein the first specified condition indicates at least one of the sewage cavity capacity or the clear water spraying amount; in response to emptying of the sewage cavity, the self-cleaning mechanism is controlled to start to conduct second spraying on the cavity wall of the sewage cavity until a second specified condition is met, and the self-cleaning mechanism is controlled to stop second spraying; wherein the second specified condition indicates the clear water spraying amount, and in the second spraying process, the drain outlet is kept open. The technical problem that an existing sewage tank is poor in self-cleaning effect can be solved.

Description

Technical Field

[0001] The present invention relates to the field of cleaning technology, and particularly to a self-cleaning method for a sewage tank, a sewage tank, a cleaning device, and a cleaning base station. Background Art

[0002] Existing cleaning devices are usually equipped with a sewage tank for collecting the sewage generated during the cleaning operation of wet cleaning components (such as mops, rollers, etc.). However, after long-term use, the inner wall of the sewage tank is prone to accumulate dirt residues and needs to be cleaned regularly. Therefore, how to achieve self-cleaning of the sewage tank to improve the cleaning effect of the sewage tank is a technical problem that urgently needs to be solved at present. Summary of the Invention

[0003] In view of the above problems existing in the prior art, the present invention provides a self-cleaning method for a sewage tank, a sewage tank, a cleaning device, and a cleaning base station to improve the self-cleaning effect of the sewage tank.

[0004] To achieve the above object and other related objects, in a first aspect of the present invention, a self-cleaning method for a sewage tank is provided. The sewage tank includes a sewage chamber and a self-cleaning mechanism installed in the sewage chamber. A sewage discharge port is provided at the bottom of the sewage tank. The self-cleaning mechanism is used to spray clean water onto the wall of the sewage chamber. The self-cleaning method includes the following self-cleaning processes:

[0005] Control the sewage discharge port to open to empty the sewage in the sewage chamber, and control the sewage discharge port to close;

[0006] Control the self-cleaning mechanism to open and perform a first spraying on the wall of the sewage chamber;

[0007] Until a first specified condition is met, control the self-cleaning mechanism to stop the first spraying and control the sewage discharge port to open; wherein, the first specified condition indicates at least one of the sewage chamber capacity or the clean water spraying amount;

[0008] In response to the emptying of the sewage chamber, control the self-cleaning mechanism to open and perform a second spraying on the wall of the sewage chamber until a second specified condition is met, and control the self-cleaning mechanism to stop the second spraying; wherein, the second specified condition indicates the clean water spraying amount, and during the second spraying process, keep the sewage discharge port open.

[0009] Beneficial effects of such a setting: The self-cleaning control method can perform two sprays during the self-cleaning process of the sewage tank. During the first spray, the sewage outlet remains closed. The ejected clean water can not only wash the wall of the sewage chamber, but also soak the wall for a period of time, thereby softening the attached dirt, weakening its adhesion, and creating favorable conditions for subsequent cleaning. During the second spray, the sewage outlet remains open. At this time, the ejected clean water can strip the loosened dirt from the wall after soaking. At the same time, the sewage is discharged in real time through the open sewage outlet, preventing the dirt from depositing again and effectively preventing secondary pollution of the wall. Through the synergistic effect of the above two sprays, the self-cleaning effect of the sewage tank can be improved, the cleanliness of the wall of the sewage chamber can be ensured, and the dirt residue can be reduced.

[0010] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps:

[0011] Determine the first information for characterizing the degree of fouling of the wall of the sewage chamber, and adjust the spraying behavior of the first spray based on the first information.

[0012] Beneficial effects of such a setting: By determining the first information for characterizing the degree of fouling of the wall of the sewage chamber and adjusting the spraying behavior of the first spray accordingly, the precision and efficiency of the self-cleaning process of the wall of the sewage chamber can be achieved. Specifically, when the degree of fouling of the wall of the sewage chamber is relatively heavy, the spraying behavior of the first spray can be increased accordingly, such as increasing the spraying pressure, the opening of the water spray nozzle, the spraying temperature, etc., so as to effectively remove stubborn stains; when the degree of fouling of the wall of the sewage chamber is relatively light, the spraying behavior of the first spray can be appropriately reduced, such as reducing the spraying pressure, the opening of the water spray nozzle, the spraying temperature, etc., to avoid over-cleaning. This dynamic adjustment mechanism can not only improve the cleaning effect, but also save water resources.

[0013] In an embodiment of the self-cleaning method of the present invention, determining the first information for characterizing the degree of fouling of the wall of the sewage chamber includes:

[0014] Determine the first information based on the first water quality information of the sewage in the sewage chamber and / or the sewage discharged from the sewage chamber before the first spray.

[0015] Beneficial effects of such a setting: By determining the first information based on the water quality information of the sewage in the sewage chamber and the discharged sewage before the first spray, the degree of fouling inside the sewage chamber before the first spray can be evaluated more comprehensively. The sewage in the sewage chamber directly reflects the fouling situation of the wall, while the water quality information of the discharged sewage can indirectly reflect the cleaning requirements of the wall. Water quality information, such as turbidity, pH value, conductivity, etc., can provide quantitative data on the degree of fouling. Compared with simple visual inspection or empirical judgment, this method is more accurate and reliable.

[0016] In an embodiment of the self-cleaning method of the present invention, determining the first information for characterizing the degree of fouling of the wall of the sewage chamber includes:

[0017] Determining the first information based on the first fouling information of the wall of the sewage chamber before the first spraying.

[0018] Beneficial effects of such a setting: By determining the first information based on the first fouling information of the wall of the sewage chamber before the first spraying, the fouling condition of the wall can be directly understood without relying on indirect indicators. This method can provide more accurate and specific fouling degree data. Moreover, this method can also collect fouling information at multiple detection points on the wall of the sewage chamber, and thus can more comprehensively evaluate the fouling degree of the entire wall, avoiding the deviation caused by local detection.

[0019] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps:

[0020] Determining the second information for characterizing the degree of fouling of the wall of the sewage chamber, and adjusting the spraying behavior of the second spraying based on the second information.

[0021] Beneficial effects of such a setting: By determining the second information for characterizing the degree of fouling of the wall of the sewage chamber and adjusting the spraying behavior of the second spraying accordingly, the precision and efficiency of the self-cleaning process during the second spraying of the wall of the sewage chamber can be achieved. Specifically, when the degree of fouling of the wall of the sewage chamber is relatively heavy, the spraying behavior of the second spraying can be increased accordingly, such as increasing the spraying pressure, the opening degree of the water spraying port, the spraying temperature, etc., so as to effectively remove stubborn stains; when the degree of fouling of the wall of the sewage chamber is relatively light, the spraying behavior of the second spraying can be appropriately reduced, such as reducing the spraying pressure, the opening degree of the water spraying port, the spraying temperature, etc., to avoid over-cleaning. This dynamic adjustment mechanism can not only improve the cleaning effect but also save water resources.

[0022] In an embodiment of the self-cleaning method of the present invention, determining the second information for characterizing the degree of fouling of the wall of the sewage chamber includes:

[0023] Determining the second information based on the second water quality information of the sewage in the sewage chamber and / or the sewage discharged from the sewage chamber collected after the first spraying and before the second spraying.

[0024] Beneficial effects of such a setting: By detecting the water quality information (such as turbidity, pH value, conductivity) of the sewage in the sewage chamber after the first spraying and before the second spraying, the degree of fouling of the sewage chamber before the second spraying can be comprehensively evaluated. These water quality information not only directly reflect the fouling condition of the chamber wall, but also indirectly reflect the cleaning requirements, providing an accurate basis for adjusting the spraying behavior of the second spraying (such as spraying pressure, water outlet opening, spraying temperature, etc.), so as to more effectively remove the remaining dirt and improve the cleaning effect. At the same time, since the sewage in the sewage chamber directly reflects the fouling condition of the chamber wall, and the water quality information of the discharged sewage can indirectly reflect the cleaning requirements of the chamber wall. Compared with simple visual inspection or empirical judgment, this method is more accurate and reliable. Therefore, by the method of the water quality information of the sewage in the sewage chamber and the discharged sewage after the first spraying and before the second spraying, the degree of fouling inside the sewage chamber before the second spraying can be more comprehensively evaluated.

[0025] In an embodiment of the self-cleaning method of the present invention, determining the second information for characterizing the fouling degree of the chamber wall of the sewage chamber includes:

[0026] Determining the second information based on the second fouling information of the chamber wall of the sewage chamber collected after the first spraying and before the second spraying.

[0027] Beneficial effects of such a setting: In the above embodiment, the second information is determined based on the second fouling information collected after the first spraying and before the second spraying, so that the fouling condition of the chamber wall can be directly understood without relying on indirect indicators. This method can provide more accurate and specific fouling degree data. And, this method can also collect fouling information at multiple detection points on the chamber wall of the sewage chamber, and thus can more comprehensively evaluate the fouling degree of the entire chamber wall, avoiding the deviation caused by local detection.

[0028] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps:

[0029] Determining the first information for characterizing the fouling degree of the chamber wall of the sewage chamber, and adjusting the spraying behaviors of the first spraying and the second spraying based on the first information;

[0030] If the first information meets the first preset condition, adjusting the spraying behavior of the first spraying to the first spraying behavior and adjusting the spraying behavior of the second spraying to the second spraying behavior.

[0031] Beneficial effects of such a setting: Since the degree of dirtiness of the sewage chamber has been determined before the first spraying, and when the spraying actions (such as spraying pressure, opening degree of the water spraying nozzle, spraying temperature, etc.) of the first spraying remain unchanged, the cleaning effect of each cleaning is basically the same, that is, the degree of dirtiness of the chamber wall of the sewage chamber before the second spraying is basically the same. Therefore, in this embodiment, by detecting the degree of dirtiness of the sewage chamber before the first spraying once, the degree of dirtiness of the sewage chamber before the second spraying can be reasonably inferred. With such a setting, the overall dirty state of the sewage chamber before the first spraying can be comprehensively reflected by the first information, thereby providing a unified reference benchmark for the two sprayings. This can ensure the consistency of the adjustment of the spraying actions of the two sprayings and avoid the incoordination problem caused by adjusting with different information respectively. For example, if the first spraying and the second spraying are adjusted based on different information respectively, it may make the spraying actions between the two sprayings lack coordination, thereby affecting the cleaning effect. At the same time, this adjustment method can also save one detection, which is beneficial to optimizing the data processing volume, simplifying the operation process, and improving the cleaning efficiency.

[0032] In an embodiment of the self-cleaning method of the present invention, the spraying action includes at least one of spraying pressure and opening degree of the water spraying nozzle. Adjusting the spraying action of the first spraying is the first spraying action, and adjusting the spraying action of the second spraying is the second spraying action, including:

[0033] Adjusting the power of the water supply pump of the self-cleaning mechanism, and / or, adjusting the opening degree of the water spraying nozzle of the self-cleaning mechanism.

[0034] Beneficial effects of such a setting: Since the power of the water supply pump is directly related to the spraying pressure at the water spraying nozzle, therefore, by adjusting the power of the water supply pump of the self-cleaning mechanism, the precise adjustment of the spraying pressure can be achieved, ensuring the accuracy of the adjustment of the spraying pressure of the first spraying and the second spraying. By adjusting the opening degree of the water spraying nozzle, the high efficiency and consistency of the cleaning effect at the water spraying nozzle can be ensured. This adjustment method has high flexibility and can flexibly adjust the opening degree of the water spraying nozzle according to different degrees of dirtiness to meet diverse cleaning requirements.

[0035] In a second aspect of the present invention, a sewage tank is provided. The sewage tank includes a sewage chamber, a self-cleaning mechanism installed in the sewage chamber, and a clean water inlet. The self-cleaning mechanism introduces clean water through the clean water inlet, and the clean water inlet is communicated with the overflow port of the clean water tank. The sewage tank performs self-cleaning by using the self-cleaning method of the above embodiment.

[0036] Beneficial effects of such a setting: By connecting the clean water inlet and the overflow port of the clean water tank, when the water level in the clean water tank exceeds the set height, the excess clean water will automatically flow out through the overflow port, enter the clean water inlet, and then realize the clean water supply for the self-cleaning mechanism inside the sewage chamber. Thus, there is no need to separately configure a water pump for the self-cleaning mechanism, and the entire water supply process of the self-cleaning mechanism can share a water pump with the water injection process of the clean water tank. Such a setting not only simplifies the equipment structure but also reduces the manufacturing cost. At the same time, this design utilizes the natural overflow principle of the clean water tank to achieve water supply, without additional energy consumption, and also has the effect of energy conservation and environmental protection. In an embodiment of the sewage tank of the present invention, a valve assembly is provided at the sewage discharge port, and in response to the docking of the sewage tank with the cleaning base station, the valve assembly can open the sewage discharge port.

[0037] Beneficial effects of such a setting: Since the valve assembly can automatically respond to the docking of the sewage tank with the cleaning base station, the automatic opening of the sewage discharge port can be realized without manual operation. This design not only effectively improves the opening efficiency of the sewage discharge port but also reduces errors caused by improper manual operation, such as forgetting to open or close the sewage discharge port. Therefore, problems such as sewage leakage or equipment damage caused by operation errors can be avoided.

[0038] In an embodiment of the sewage tank of the present invention, the valve assembly includes a baffle and a push rod. The baffle is rotatably connected to the wall of the sewage chamber, and the push rod is slidably arranged in the sewage chamber; in response to the docking of the sewage tank with the cleaning base station, the push rod mechanism on the cleaning base station pushes the push rod to slide, and the push rod pushes the baffle to rotate to open the sewage discharge port.

[0039] Beneficial effects of such a setting: The push rod mechanism on the cleaning base station automatically pushes the push rod to slide, and then pushes the baffle to rotate to open the sewage discharge port. The entire process does not require manual operation. This automated design can improve the convenience of opening the sewage discharge port, reduce manual intervention, especially in situations where the sewage discharge port needs to be opened frequently, and can effectively improve work efficiency.

[0040] In an embodiment of the sewage tank of the present invention, the valve assembly further includes an elastic reset member, and the elastic reset member is installed on the baffle and / or the wall of the sewage chamber. In response to the separation of the sewage tank from the cleaning base station, the elastic reset member drives the baffle to rotate in the reverse direction to close the sewage discharge port.

[0041] Beneficial effects of such a setting: The setting of the elastic reset member can realize the automatic closing of the sewage discharge port. When the sewage tank is separated from the cleaning base station, the elastic reset member can drive the baffle to rotate in the reverse direction to close the sewage discharge port, and the entire process does not require manual intervention. Therefore, this design can improve the closing efficiency of the sewage discharge port and also enhance the convenience of the sewage discharge port closing operation.

[0042] In an embodiment of the self-cleaning method of the present invention, the sewage tank includes: a sewage tank, a tank cover, a water inlet channel, and a self-cleaning mechanism. The top of the sewage chamber has an opening; the tank cover is detachably covered on the opening; the water inlet channel is arranged on the tank cover and has a water outlet and a water inlet that can be connected to a clean water supply pipeline; the self-cleaning mechanism is arranged on the tank cover and is located inside the sewage chamber. The self-cleaning mechanism includes a water supply port and a water spraying port, and the water supply port is communicated with the water outlet; wherein, the reverse thrust generated when the clean water sprays out from the water spraying port drives the self-cleaning mechanism to rotate, so as to spray the clean water onto the wall of the sewage chamber.

[0043] The beneficial effects of such a setting are as follows: By arranging a self-cleaning mechanism in the sewage chamber and utilizing the rotational movement of the self-cleaning mechanism in the sewage chamber, the clean water sprays out from the water spraying port and flushes the wall of the sewage chamber from multiple angles, thereby achieving full coverage of all areas of the wall of the sewage chamber. Such a setting can effectively clean the residual dirt on the wall of the sewage chamber and realize the automatic cleaning of the sewage chamber. Since the entire cleaning process can be carried out automatically, the cumbersome operation of traditional manual cleaning can be avoided, thereby improving the convenience of cleaning the sewage tank. At the same time, such a multi-angle spraying method can also improve the cleaning effect of the sewage chamber and ensure that the wall of the sewage chamber is thoroughly cleaned. In addition, since the self-cleaning mechanism is driven to rotate by the water spraying reaction force, there is no need to additionally set a driving motor or a transmission device, which not only reduces energy consumption and the number of parts, but also avoids the failure risk caused by the contact of electric components with sewage and improves the durability of the self-cleaning mechanism.

[0044] In the third aspect of the present invention, a cleaning device is provided. The cleaning device includes the sewage tank in the above embodiment, and the sewage tank performs self-cleaning by using the self-cleaning method of any one of the above embodiments.

[0045] In the fourth aspect of the present invention, a cleaning base station is provided. The cleaning base station includes the sewage tank in the above embodiment, and the sewage tank performs self-cleaning by using the self-cleaning method of any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other embodiments can be obtained based on these drawings without creative efforts.

[0047] Figure 1 It is a three-dimensional structure schematic diagram of the sewage tank of the present invention in an embodiment;

[0048] Figure 2 For Figure 1 It is a top view of the sewage tank in the embodiment;

[0049] Figure 3 is Figure 2 a sectional view taken along the A-A direction;

[0050] Figure 4 is a schematic structural view of the sewage tank of the present invention with the tank cover removed in an embodiment;

[0051] Figure 5 is a schematic structural view of the tank cover of the sewage tank of the present invention in an embodiment;

[0052] Figure 6 is a three-dimensional structural view of the sewage tank of the present invention from another angle in an embodiment;

[0053] Figure 7 is Figure 6 a sectional view taken along the C-C direction;

[0054] Figure 8 is Figure 7 a partial enlarged view of the D area in;

[0055] Figure 9 is a partial structural sectional view of the sewage tank of the present invention in an embodiment;

[0056] Figure 10 is Figure 9 a partial enlarged view of the E area in;

[0057] Figure 11 is a three-dimensional structural view of the tank cover of the sewage tank of the present invention without the self-cleaning mechanism installed in an embodiment;

[0058] Figure 12 is Figure 11 a projection view of the tank cover shown in the embodiment from another angle;

[0059] Figure 13 is Figure 12 a sectional view taken along the F-F direction;

[0060] Figure 14 is a projection view of the tank cover of the sewage tank of the present invention with the self-cleaning mechanism installed in an embodiment;

[0061] Figure 15 is Figure 14 a partial enlarged view of the G area in;

[0062] Figure 16 is a schematic structural view of the tank cover of the sewage tank of the present invention with the cover plate removed in an embodiment;

[0063] Figure 17 is Figure 16 a partial sectional view taken along the H-H direction in;

[0064] Figure 18Schematic diagram of the projection of the lid of the sewage tank of the present invention at another angle in an embodiment;

[0065] Figure 19 is Figure 18 Partial sectional view along the I-I direction in;

[0066] Figure 20 Schematic diagram of the structure of the sewage tank of the present invention with a sewage discharge port provided at the bottom of the sewage tank in an embodiment;

[0067] Figure 21 Schematic diagram of the structure of the sewage tank of the present invention with a water inlet pipe provided in the sewage chamber in an embodiment;

[0068] Figure 22 Schematic diagram of the structure of the sewage tank of the present invention with the valve assembly closing the sewage discharge port in an embodiment;

[0069] Figure 23 Schematic diagram of the structure of the sewage tank of the present invention with the valve assembly opening the sewage discharge port in an embodiment;

[0070] Figure 24 Schematic diagram of the structure when the sewage tank of the present invention is docked with the cleaning base station in an embodiment;

[0071] Figure 25 Schematic diagram of the installation positions of the sewage tank and the clean water tank of the present invention at an angle in an embodiment;

[0072] Figure 26 Schematic diagram of the installation positions of the sewage tank and the clean water tank of the present invention at another angle in an embodiment;

[0073] Figure 27 Explosion diagram of the sewage tank and the clean water tank of the present invention in an embodiment;

[0074] Figure 28 Schematic diagram of the installation positions of the sewage tank and the clean water tank of the present invention at yet another angle in an embodiment;

[0075] Figure 29 Flow chart of the self-cleaning method of the sewage tank of the present invention in an embodiment.

[0076] Element reference numeral description:

[0077] 100, sewage tank; 110, sewage chamber; 111, opening; 112, clean water inlet; 113, sewage discharge port; 114, water inlet pipe; 115, chute; 116, avoidance chamber; 117, box body; 1171, support shaft; 120, box cover; 1201, mounting hole; 121, cover body; 1211, groove; 12111, positioning platform; 122, cover plate; 123, accommodation chamber; 1231, blind hole section; 1232, stage section; 1233, annular protrusion; 124, convex part; 130, water inlet channel; 131, water inlet; 132, water outlet; 133, groove section; 134, through hole section; 140, self-cleaning mechanism; 141, water supply port; 142, water spray port; 143, rotating arm; 1431, water flow channel; 14311, first channel; 14312, second channel; 1432, rotating shaft; 14321, flange part; 14322, cylindrical part; 1433, rod body; 14331, mounting part; 14332, extension section; 144, bearing; 150, clamping structure; 151, clamping block; 152, clamping groove; 160, sealing cover; 161, annular groove; 170, valve assembly; 171, baffle; 1711, plate body; 1712, docking part; 172, ejector rod; 1721, sliding part; 1722, pushing part; 173, elastic reset member; 174, return rotating shaft; 310, ejector rod mechanism; 400, clean water tank; 410, overflow port. Detailed implementation manners

[0078] The following uses specific specific examples to illustrate the implementation manners 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 implementation manners. 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, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for describing specific specific implementation manners, rather than for limiting the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually in accordance with conventional conditions or in accordance with the conditions recommended by each manufacturer.

[0079] When the embodiments give numerical ranges, it should be understood that unless otherwise specified in the present invention, any value between the two endpoints of each numerical range and any one of the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention, based on the understanding of those skilled in the art of the prior art and the description of the present invention, can also use any methods, devices, and materials similar to or equivalent to the methods, devices, and materials in the embodiments of the present invention to implement the present invention.

[0080] It should be noted that terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present invention.

[0081] Please refer to Figures 1 to 29 , the present invention provides a self-cleaning method for a sewage tank 100, the sewage tank 100, a cleaning device and a cleaning base station. This self-cleaning method can perform two sprays during the self-cleaning process of the sewage tank 100. During the first spray, the sewage outlet 113 is closed, and clean water flushes and soaks the cavity wall to soften the dirt; during the second spray, the sewage outlet 113 is opened, and the softened dirt is flushed with clean water and the sewage is discharged to prevent secondary pollution of the cavity wall. This synergistic effect can improve the cleaning effect, ensure the inner wall is clean, and reduce the residue of dirt on the cavity wall.

[0082] Please refer to Figure 29 , the self-cleaning method includes the following processes:

[0083] S1. Control the sewage outlet 113 to open to drain the sewage in the sewage cavity 110, and control the sewage outlet 113 to close;

[0084] S2. Control the self-cleaning mechanism 140 to open and perform the first spray on the cavity wall of the sewage cavity 110;

[0085] S3. Until the first specified condition is met, control the self-cleaning mechanism 140 to stop the first spray, and control the sewage outlet 113 to open, where the first specified condition indicates at least one of the capacity of the sewage cavity 110 or the amount of clean water sprayed;

[0086] S4. In response to the emptying of the sewage cavity 110, control the self-cleaning mechanism 140 to open and perform the second spray on the cavity wall of the sewage cavity 110 until the second specified condition is met, and control the self-cleaning mechanism 140 to stop the second spray, where the second specified condition indicates the amount of clean water sprayed, and the sewage outlet 113 is kept open during the second spray.

[0087] It should be noted that the execution subject of steps S1 to S4 in the above self-cleaning method is a controller, which can be a controller set on the sewage tank 100, a controller set on the cleaning device, or a controller set on the cleaning base station. In the actual production process, it needs to be determined according to the specific installation position of the sewage tank 100.

[0088] The above self-cleaning control method can perform two sprays during the self-cleaning process of the sewage tank 100. During the first spray, the sewage outlet 113 remains closed. The sprayed clean water can not only wash the inner wall of the sewage chamber 110, but also soak the inner wall for a period of time, thereby softening the attached dirt, weakening its adhesion, and creating favorable conditions for subsequent cleaning. During the second spray, the sewage outlet 113 remains open. At this time, the sprayed clean water can peel off the loosened dirt from the inner wall after soaking. At the same time, the sewage is discharged in real time through the opened sewage outlet 113 to avoid the re-deposition of dirt and effectively prevent the secondary pollution of the inner wall. Through the synergistic effect of the above two sprays, the self-cleaning effect of the sewage tank 100 can be improved, the cleanliness of the inner wall of the sewage chamber 110 can be ensured, and the dirt residue can be reduced.

[0089] It should be noted that in the above embodiments, the liquid sprayed by the self-cleaning mechanism 140 during the self-cleaning process can be ordinary tap water or a solution containing a cleaning agent. If a cleaning agent solution (such as a neutral cleaner, an enzyme preparation, or a specific decontamination component) is used, the decomposition ability of stubborn stains can be enhanced.

[0090] The following is a detailed description of each step.

[0091] S1. Control the sewage outlet 113 to open to drain the sewage in the sewage chamber 110, and control the sewage outlet 113 to close. In this step, there are various methods for the controller to control the opening and closing of the sewage outlet 113, including but not limited to setting an electric valve on the sewage tank 100, and the controller controls the opening of the electric valve to drain the sewage in the sewage chamber 110, and after the sewage is discharged, controls the electric valve to close the sewage outlet 113 again.

[0092] S2. Control the self - cleaning mechanism 140 to start and perform the first spraying on the wall of the sewage chamber 110. In this step, after the self - cleaning mechanism 140 is started, the self - cleaning mechanism 140 can spray clean water through its own water spray nozzles 142 to wash the wall of the sewage chamber 110. It should be noted that the clean water sprayed from the water spray nozzles 142 should ensure that it can impact and soften the dirt attached to the wall. In this step, the structural type of the self - cleaning mechanism 140 is not limited. For example, the self - cleaning mechanism 140 can be a nozzle structure driven by a rotating mechanism. This structure drives the nozzle to rotate through an external rotating mechanism (such as a rotating device driven by a motor), so that the water spray nozzles 142 can cover multiple areas on the inner wall of the sewage chamber 110, thus achieving a comprehensive wash. The self - cleaning mechanism 140 can also be a self - rotating nozzle structure driven by the water spray thrust. This structure uses the reaction force (water spray thrust) generated by the water flow sprayed from the water spray nozzles 142 to drive the nozzle itself to rotate. The self - cleaning mechanism 140 can also be a fixed nozzle structure. The nozzle is fixed at a specific position on the inner wall of the sewage chamber 110. Through the optimized design of multiple water spray nozzles 142 or the water spray direction, it is ensured that the clean water can cover the key areas on the inner wall of the sewage chamber 110.

[0093] S3. When the first specified condition is met, control the self - cleaning mechanism 140 to stop the first spraying and control the sewage discharge port 113 to open; wherein, the first specified condition indicates at least one of the capacity of the sewage chamber 110 or the amount of clean water sprayed.

[0094] In one embodiment, the first specified condition indicates the capacity of the sewage chamber 110. Specifically, during the first spraying process, since the sewage discharge port 113 remains closed, the sprayed clean water will continuously accumulate in the sewage chamber 110. To prevent the water accumulation in the sewage chamber 110 from being too much and causing overflow, a capacity threshold needs to be set. When the accumulated water volume reaches a certain proportion (such as 2 / 3 or 3 / 4) of the capacity of the sewage chamber 110, the controller will trigger the self - cleaning mechanism 140 to stop the first spraying. To achieve this function, a capacity detection device (such as a liquid level sensor or a pressure sensor) can be set in the sewage chamber 110 to monitor the water accumulation in the sewage chamber 110 in real time. When the accumulated water volume reaches the preset proportion, the capacity detection device transmits a signal to the controller, and the controller then issues an instruction to control the self - cleaning mechanism 140 to stop spraying and control the sewage discharge port 113 to open.

[0095] In another embodiment, the first specified condition indicates the amount of clean water sprayed during the first spraying process. Specifically, during the first spraying process, a flow detection device is provided at the clean water inlet 112 of the self-cleaning mechanism 140 or at the clean water supply water pump. The flow detection device monitors the flow rate of the clean water in real time and, in combination with the spraying time, accurately calculates the first spraying water volume of the self-cleaning mechanism 140. When the spraying volume reaches the preset spraying volume, the controller will control the self-cleaning mechanism 140 to stop the first spraying. The specific calculation formula is: spraying volume = flow rate × spraying time. The preset spraying volume can be adjusted according to the capacity of the sewage tank 100 and actual requirements.

[0096] In other embodiments, the first specified condition indicates the capacity of the sewage chamber 110 and the amount of clean water sprayed. In this embodiment, the first specified condition needs to consider both the accumulated water volume in the sewage chamber 110 and the amount of clean water sprayed during the first spraying process. Specifically, a capacity detection device (such as a liquid level sensor or a pressure sensor) can be provided in the sewage chamber 110 to monitor the accumulated water volume in the sewage chamber 110 in real time. A flow detection device is provided at the clean water inlet 112 of the self-cleaning mechanism 140 or at the clean water supply water pump to monitor the flow rate of the clean water in real time. The controller comprehensively judges the signals from the capacity detection device and the flow detection device, and judges whether the accumulated water volume in the sewage chamber 110 reaches a preset ratio (such as 2 / 3 or 3 / 4) according to the signal of the capacity detection device. At the same time, the controller also calculates whether the amount of clean water sprayed during the first spraying process reaches a preset value in combination with the signal of the flow detection device and the spraying time. The condition for the self-cleaning mechanism 140 to stop the first spraying can be that when the accumulated water volume in the sewage chamber 110 reaches the preset ratio, or when the amount of clean water sprayed during the first spraying process reaches the preset value, the controller controls the self-cleaning mechanism 140 to stop the first spraying. If any one of the two conditions is met first, the controller will also control the self-cleaning mechanism 140 to stop spraying and control the sewage discharge port 113 to open to ensure that the accumulated water volume in the sewage chamber 110 will not be too much and at the same time ensure the accurate control of the spraying volume.

[0097] It should be noted that in this step, after the controller controls the self-cleaning mechanism 140 to stop the first spraying, it can immediately control the sewage discharge port 113 to open, or it can wait for a soaking time and then control the sewage discharge port 113 to open. This embodiment does not make specific limitations on this.

[0098] S4. In response to the emptying of the sewage chamber 110, control the self-cleaning mechanism 140 to start the second spraying on the chamber wall of the sewage chamber 110 until the second specified condition is met, and then control the self-cleaning mechanism 140 to stop the second spraying; wherein, the second specified condition indicates the amount of clean water sprayed, and during the second spraying process, the sewage discharge port 113 is kept open.

[0099] In this step, the second specified condition indicates the amount of clean water sprayed. Specifically, a flow detection device may be provided at the clean water inlet 112 of the self-cleaning mechanism 140 or at the clean water supply water pump to monitor the flow rate of clean water in real time. The controller can calculate the amount of clean water sprayed during the second spraying process according to the formula by combining the spraying time. The specific formula is: spraying amount = flow rate × spraying time. The preset spraying amount can be optimized according to the capacity of the sewage chamber 110 and the nature of the dirt. For example, for a sewage chamber 110 with a capacity of A, the second spraying amount can be set to (1 / 2)A, (2 / 3)A, etc. When the spraying amount reaches the preset value, the controller controls the self-cleaning mechanism 140 to stop the second spraying. At the same time, the controller controls the sewage outlet 113 to remain open to ensure that the sewage in the sewage chamber 110 is completely discharged.

[0100] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps: determining first information for characterizing the degree of fouling of the chamber wall of the sewage chamber 110, and adjusting the spraying behavior of the first spraying based on the first information. The first information for characterizing the degree of fouling of the chamber wall of the sewage chamber 110 may be dirt detection information of the chamber wall of the sewage chamber 110, or water quality detection information of the sewage in the sewage chamber 110 or the sewage discharged from the sewage chamber 110, etc., and the present embodiment does not limit this. The spraying behavior in this embodiment may be any spraying parameter that can affect the cleaning effect of the chamber wall of the sewage chamber 110, such as spraying pressure, opening degree of the water spraying port, spraying temperature, etc. There are also various ways to adjust the spraying behavior of the first spraying based on the first information. For example, the spraying pressure in the spraying behavior of the first spraying can be adjusted by adjusting the power of the water inlet pump of the self-cleaning mechanism 140, or the opening degree of the water spraying port in the spraying behavior of the first spraying can be adjusted by adjusting the opening degree of the water spraying port 142 of the self-cleaning mechanism 140, etc.

[0101] In this embodiment, by determining the first information for characterizing the degree of fouling of the chamber wall of the sewage chamber 110 and adjusting the spraying behavior of the first spraying accordingly, the precision and efficiency of the self-cleaning process of the chamber wall of the sewage chamber 110 can be achieved. Specifically, when the degree of fouling of the chamber wall of the sewage chamber 110 is relatively heavy, the controller will control the sewage tank 100 to correspondingly increase the spraying behavior parameters of the first spraying, such as increasing one or more of the spraying pressure, the opening degree of the water spraying port, and the spraying temperature, so as to effectively remove stubborn stains. When the degree of fouling of the chamber wall of the sewage chamber 110 is relatively light, the controller will control the sewage tank 100 to appropriately reduce the spraying behavior of the first spraying, such as reducing the spraying pressure, the opening degree of the water spraying port, the spraying temperature, etc., to avoid over-cleaning. This dynamic adjustment mechanism can not only improve the cleaning effect but also save water resources.

[0102] Optionally, in an embodiment of the self-cleaning method of the present invention, determining the first information for characterizing the fouling degree of the inner wall of the sewage chamber 110 includes: determining the first information based on the first water quality information of the sewage in the sewage chamber 110 before the first spraying and / or the sewage discharged from the sewage chamber 110. In one embodiment, a water quality detection device may be provided in the sewage chamber 110 to determine the water quality information of the sewage in the sewage chamber 110 before the first spraying. The water quality detection device can be installed at the bottom or side wall of the sewage chamber 110 or any other position where a representative sewage sample can be detected. In another embodiment, a water quality detection device may be provided at the sewage discharge port 113 to determine the water quality information of the sewage discharged from the sewage chamber 110 before the first spraying. By detecting the water quality of the sewage in the sewage chamber 110 or the sewage discharged from the sewage chamber 110, the fouling degree of the inner wall of the sewage chamber 110 can be indirectly determined. The water quality detection device may include a turbidity sensor, which is used to measure the turbidity of the sewage. The higher the turbidity, the dirtier the sewage. The water quality detection device may also include a chemical oxygen demand (COD) sensor, which is used to measure the content of organic matter in the sewage. The higher the COD value, the dirtier the sewage. The water quality detection device may also be a conductivity sensor, which is used to measure the conductivity of the sewage. The higher the conductivity, the higher the content of dissolved solids in the sewage, usually indicating a higher fouling degree. In actual use, it is usually necessary to select a suitable water quality detection device according to the nature of the sewage and the usage scenario. For example, for sewage containing a large amount of suspended particles, a turbidity sensor may be more suitable; for sewage with a high content of organic matter, a COD sensor may be more effective.

[0103] It should be noted that the first information determined by the water quality detection device usually needs to undergo certain data processing to convert parameters such as turbidity, COD, and conductivity in the water quality information into standardized values, and these standardized values will be fed back to the controller. The controller will evaluate the fouling degree of the sewage chamber 110 based on the standardized values and determine the fouling level (mild, moderate, or severe) accordingly. In the prior art, there are detailed records on how to convert parameters such as turbidity, COD, and conductivity in the water quality information into standardized values. In this embodiment, only the existing data processing method is applied, so no further description will be given here.

[0104] In the above embodiment, by determining the first information based on the water quality information of the sewage in the sewage chamber 110 before the first spraying and the sewage discharged from the sewage chamber 110, the fouling degree inside the sewage chamber 110 before the first spraying can be evaluated more comprehensively. The water quality information of the sewage in the sewage chamber 110 and the discharged sewage can indirectly reflect the cleaning requirements of the inner wall. Water quality information, such as turbidity, pH value, conductivity, etc., can provide quantitative fouling degree data, which is more accurate and reliable than simple visual inspection or empirical judgment.

[0105] In an embodiment of the self-cleaning method of the present invention, determining the first information for characterizing the degree of fouling of the wall of the sewage chamber 110 includes: determining the first information based on the first fouling information of the wall of the sewage chamber 110 before the first spraying. When determining the first fouling information on the surface of the wall of the sewage chamber 110 before the first spraying, a detection point can be set on the wall of the sewage chamber 110, or multiple detection points can be set on the wall of the sewage chamber 110, etc., as long as it is ensured that the detection points can accurately reflect the fouling information inside the sewage chamber 110. There can be various detection devices for determining the first fouling information. For example, the detection device can be an optical sensor, which detects the intensity of the reflected light on the wall surface by emitting and receiving light. The higher the degree of fouling, the lower the intensity of the reflected light. The detection device can also be an ultrasonic sensor, which detects the intensity of the reflected wave on the wall surface by emitting and receiving ultrasonic signals. The higher the degree of fouling, the lower the intensity of the reflected wave. The detection device can also be a conductivity sensor, which judges the degree of fouling by detecting the change in conductivity on the wall surface. The higher the degree of fouling, the more obvious the change in conductivity. The detection device can also be an image recognition sensor, which takes an image of the wall of the sewage chamber 110 through a camera and analyzes the degree of fouling of the wall using image recognition technology. The image recognition system can recognize the area, color, and distribution of the stains.

[0106] It should be noted that the fouling information determined by the detection device needs to go through subsequent data processing steps to convert parameters such as the intensity of the reflected light on the wall surface, the intensity of the reflected wave on the wall surface, and the change in conductivity on the wall surface into standardized values, and these standardized values will be fed back to the controller. The controller will evaluate the degree of fouling of the wall of the sewage chamber 110 based on the standardized values and determine the fouling level (mild, moderate, or severe) accordingly. In the prior art, there are relevant detailed records on how to convert parameters such as the intensity of the reflected light on the wall surface, the intensity of the reflected wave on the wall surface, and the change in conductivity on the wall surface into standardized values. In this embodiment, only the existing data processing method is applied, so no further description will be given here.

[0107] In the above embodiment, by determining the first fouling information of the wall of the sewage chamber 110 before the first spraying to determine the first information, the fouling situation of the wall can be directly understood without relying on indirect indicators. This method can provide more accurate and specific fouling degree data. Moreover, this method can also collect fouling information by setting multiple detection points on the wall of the sewage chamber 110, and thus can more comprehensively evaluate the fouling degree of the entire wall, avoiding the deviation caused by local detection.

[0108] In an embodiment of the self-cleaning method of the present invention, adjusting the spraying behavior of the first spraying based on the first information includes: if the first information meets the first preset condition, adjusting the spraying behavior of the first spraying to the first spraying behavior. In an embodiment, the first preset condition may be the degree of dirtiness of the cavity wall. According to the degree of dirtiness of the cavity wall, adjust the spraying behavior of the first spraying to the first spraying behavior. For example, when the detection device is an optical sensor, the pollution degree of the wall of the sewage chamber 110 can be defined according to the different intensities of the reflected light. For example, when the intensity of the reflected light is relatively high, it can be defined as mild pollution. At this time, the parameters of the first spraying behavior just meet the spraying requirements in the case of mild pollution. Exemplarily, the first spraying behavior can be set to a spraying pressure of P1, a water spray opening of K1, and a spraying temperature of T1. On the contrary, when the intensity of the reflected light is relatively low, it is defined as severe pollution. At this time, the parameters of the first spraying behavior just meet the spraying requirements in the case of severe pollution. Exemplarily, the first spraying behavior can be set to a spraying pressure of P2 (where P2 > P1), a water spray opening of K2 (where K2 > K1), and a spraying temperature of T2 (where T2 > T1).

[0109] In another embodiment, the first preset condition may also be the water quality parameter of the sewage in the sewage chamber 110 or the discharged sewage. According to the water quality parameter, adjust the spraying behavior of the first spraying to the first spraying behavior. For example, when the turbidity level of the sewage is mildly turbid, the parameters of the first spraying behavior just meet the spraying requirements in the case of mild pollution. Exemplarily, the first spraying behavior can be set to a spraying pressure of P3, a water spray opening of K3, and a spraying temperature of T3. When the turbidity level of the sewage is severely turbid, the first spraying behavior just meets the spraying requirements in the case of severe pollution. Exemplarily, the first spraying behavior can be set to a spraying pressure of P4 (where P4 > P3), a water spray opening of K4 (where K4 > K3), and a spraying temperature of T4 (where T4 > T3).

[0110] In the above embodiments, by adjusting the spraying behavior according to the actual degree of dirtiness, it is possible to adopt an appropriate cleaning intensity for different degrees of dirtiness. For example, when it is severely dirty, use a higher spraying pressure, water spray opening, and spraying temperature to ensure that stubborn stains are effectively removed; when it is mildly dirty, use a lower spraying pressure, water spray opening, and spraying temperature to avoid over-cleaning. This can make the adjustment of the spraying behavior in the first spraying process more accurate, not only ensuring the cleaning effect of the cavity wall, but also avoiding over-scouring of the cavity wall and causing waste of water resources.

[0111] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps: determining second information for characterizing the degree of fouling of the wall of the sewage chamber 110, and adjusting the spraying behavior of the second spraying based on the second information. In this embodiment, the spraying behavior may be any spraying parameter that can affect the cleaning effect of the wall of the sewage chamber 110, such as spraying pressure, opening degree of the water spraying port, spraying temperature, etc. The second information for characterizing the degree of fouling of the wall of the sewage chamber 110 may be dirt detection information of the wall of the sewage chamber 110, or water quality detection information of the sewage in the sewage chamber 110 or the sewage discharged from the sewage chamber 110, etc., and the present implementation does not limit this. There are also various ways to adjust the spraying behavior of the second spraying based on the second information. For example, the spraying behavior (i.e., spraying pressure) of the second spraying can be adjusted by adjusting the power of the water inlet pump of the self-cleaning mechanism 140, or the spraying behavior (i.e., opening degree of the water spraying port) of the second spraying can be adjusted by adjusting the opening degree of the water spraying port 142 of the self-cleaning mechanism 140. It should be noted that in this embodiment, the second information for characterizing the degree of fouling of the wall of the sewage chamber 110 may only reflect the degree of fouling of the wall of the sewage chamber 110 before the first spraying, or only reflect the degree of fouling of the wall before the second spraying after the first spraying, or can reflect both the degree of fouling of the wall of the sewage chamber 110 before the first spraying and the degree of fouling of the wall before the second spraying after the first spraying.

[0112] In this embodiment, by determining the second information for characterizing the degree of fouling of the wall of the sewage chamber 110 and adjusting the spraying behavior of the second spraying accordingly, the precision and efficiency of the self-cleaning process of the wall of the sewage chamber 110 can be achieved. Specifically, when the degree of fouling of the wall of the sewage chamber 110 is relatively heavy, the controller will control the sewage tank 100 to correspondingly increase the spraying behavior of the second spraying, such as increasing the spraying pressure, opening degree of the water spraying port, spraying temperature, etc., so as to effectively remove stubborn stains. When the degree of fouling of the wall of the sewage chamber 110 is relatively light, the controller will control the sewage tank 100 to appropriately reduce the spraying behavior of the second spraying, such as reducing the spraying pressure, opening degree of the water spraying port, spraying temperature, etc., to avoid over-cleaning. This dynamic adjustment mechanism can not only improve the cleaning effect but also save water resources.

[0113] In an embodiment of the self-cleaning method of the present invention, determining the second information for characterizing the degree of fouling of the chamber wall of the sewage chamber 110 includes: determining the second information based on the second water quality information of the sewage in the sewage chamber 110 and / or the sewage discharged from the sewage chamber 110 after the first spraying and before the second spraying. In an embodiment, a water quality detection device may be provided in the sewage chamber 110 to determine the water quality information of the sewage chamber 110 after the first spraying and before the second spraying. Exemplarily, the water quality information in the sewage chamber 110 may be detected after the first spraying and before the sewage discharge port 113 is opened. The specific detection method of the water quality detection device may refer to the description of the detection method of the first water quality information in the above embodiment, and will not be repeated here. In another embodiment, a water quality detection device may also be provided at the sewage discharge port 113 to collect the water quality information of the sewage discharged from the sewage chamber 110 after the first spraying and before the second spraying. Exemplarily, the water quality information of the sewage at the sewage discharge port 113 may be collected when the sewage discharge port 113 is opened after the first spraying. The detection method of the water quality detection device and the introduction of the detection device may refer to the relevant descriptions in the above embodiment, and will not be repeated here.

[0114] In the above embodiment, by determining the water quality information (such as turbidity, pH value, conductivity) of the sewage in the sewage chamber 110 and the discharged sewage after the first spraying and before the second spraying, the degree of fouling of the sewage chamber 110 before the second spraying can be comprehensively evaluated. These water quality information not only reflect the fouling condition of the chamber wall, but also can reflect the cleaning requirement, providing an accurate basis for adjusting the parameters of the second spraying behavior (such as spraying pressure, spray nozzle opening, spraying temperature, etc.), so as to more effectively remove the remaining dirt and improve the cleaning effect. At the same time, since the water quality information of the sewage in the sewage chamber 110 and the discharged sewage can indirectly reflect the cleaning requirement of the chamber wall, this method is more accurate and reliable compared with simple visual detection or empirical judgment.

[0115] In an embodiment of the self-cleaning method of the present invention, determining the second information for characterizing the degree of fouling of the chamber wall of the sewage chamber 110 includes: determining the second information based on the second fouling information of the chamber wall of the sewage chamber 110 collected after the first spraying and before the second spraying. It should be noted that when determining the second fouling information, it can be carried out after the first spraying and after the sewage chamber 110 is emptied, or during the sewage discharge process when the sewage discharge port 113 is opened after the first spraying. As long as the degree of fouling information of the chamber wall of the sewage chamber 110 can be accurately determined. In this embodiment, the determination method and detection device of the second fouling information may refer to the determination method and detection device introduction of the first fouling information in the above embodiment, and will not be repeated here.

[0116] In the above embodiments, the second information is determined based on the second dirt information collected after the first spraying and before the second spraying, so that the dirt condition of the chamber wall can be directly understood without relying on indirect indicators. This method can provide more accurate and specific dirt degree data. Moreover, this method can also collect dirt information by setting multiple detection points on the chamber wall of the sewage chamber 110, and thus can more comprehensively evaluate the dirt degree of the entire chamber wall, avoiding the deviation caused by local detection.

[0117] In an embodiment of the self-cleaning method of the present invention, adjusting the spraying behavior of the second spraying based on the second information includes: if the second information meets the second preset condition, adjusting the spraying behavior of the second spraying to the second spraying behavior. It should be noted that in this embodiment, the specific implementation manner of adjusting the spraying behavior of the second spraying based on the second information can refer to the implementation manner of adjusting the spraying behavior of the first spraying based on the first information in the above embodiments, and will not be repeated here.

[0118] In an embodiment of the self-cleaning method of the present invention, the self-cleaning method further includes the following steps: determining the first information for characterizing the dirt degree of the chamber wall of the sewage chamber 110, and adjusting the spraying behaviors of the first spraying and the second spraying based on the first information; if the first information meets the first preset condition, adjusting the spraying behavior of the first spraying to the first spraying behavior, and adjusting the spraying behavior of the second spraying to the second spraying behavior.

[0119] Since the dirt degree of the sewage chamber 110 has been determined before the first spraying, and when the spraying conditions (such as spraying pressure, spray nozzle opening, spraying temperature, etc.) of the first spraying remain unchanged, the cleaning effect of each cleaning is basically the same, that is, the dirt degree of the chamber wall of the sewage chamber 110 before the second spraying is basically the same. Therefore, in this embodiment, by detecting the dirt degree of the sewage chamber 110 before the first spraying once, the dirt degree in the sewage chamber 110 before the second spraying can be reasonably inferred. With such a setting, the overall dirt state of the sewage chamber 110 before the first spraying can be comprehensively reflected by the first information, thereby providing a unified reference benchmark for the two sprayings. This can ensure the consistency of the adjustment of the spraying behaviors of the two sprayings, and avoid the incoordination problem caused by adjusting with different information respectively. For example, if the first spraying and the second spraying are adjusted based on different information respectively, it may make the spraying behaviors between the two sprayings lack coordination, thereby affecting the cleaning effect. At the same time, this adjustment method can also save one detection, which is beneficial to optimizing the data processing volume, simplifying the operation process, and improving the cleaning efficiency.

[0120] In an embodiment of the self-cleaning method of the present invention, the spraying behavior includes at least one of spraying pressure, the opening degree of the water spray nozzle, and spraying temperature. Adjusting the spraying behavior of the first spraying to be the first spraying behavior and adjusting the spraying behavior of the second spraying to be the second spraying behavior includes: adjusting the power of the water supply pump of the self-cleaning mechanism 140. Specifically, in one embodiment, the spraying behavior includes spraying pressure, and the water supply pump of the self-cleaning mechanism 140 can adopt a variable-frequency pump. By adjusting the operating frequency of the water supply pump, the power output of the water supply pump can be correspondingly changed, thereby realizing the change of the spraying behavior at the water spray nozzle 142, that is, the change of the spraying pressure. For example, when the wall of the sewage chamber 110 is in a lightly soiled state, the pump power can be set to a lower value to generate a lower spraying pressure at the water spray nozzle 142. If the wall of the sewage chamber 110 is severely soiled, the pump power can be adjusted to a higher value to generate a higher spraying pressure at the water spray nozzle 142.

[0121] In this embodiment, since the power of the water supply pump is directly related to the spraying behavior (i.e., spraying pressure) at the water spray nozzle 142, the linear or stepped precise adjustment of the spraying pressure can be realized by adjusting the power of the water supply pump, ensuring the accuracy of the adjustment of the spraying pressure of the first spraying behavior and the spraying pressure of the second spraying behavior, and avoiding the hysteresis or insufficient accuracy problems existing in the traditional valve adjustment.

[0122] In another embodiment, the spraying behavior includes the opening degree of the water spray nozzle. Adjusting the spraying behavior of the first spraying to be the first spraying behavior and adjusting the spraying behavior of the second spraying to be the second spraying behavior includes: adjusting the opening degree of the water spray nozzle 142 of the self-cleaning mechanism 140. In one embodiment, an electric control valve can be installed at the water spray nozzle 142, and by controlling the action of the electric control valve, the adjustment of the opening degree of the water spray nozzle 142 can be realized, that is, the adjustment of the first spraying behavior and the second spraying behavior can be realized. In another embodiment, a manual control valve can also be used, and the opening degree of the water spray nozzle 142 can be adjusted manually, that is, the adjustment of the first spraying behavior and the second spraying behavior can be realized. It should be noted that in this embodiment, the structure of the water spray nozzle 142 is a structure with an adjustable opening degree.

[0123] The opening degree of the water spray nozzle 142 directly affects the flow rate of the sprayed water flow. Generally speaking, the larger the opening degree, the larger the water flow rate, and the better the spraying and cleaning effect. The smaller the opening degree, the smaller the water flow rate, and the weaker the spraying and cleaning effect. Therefore, when the inner wall of the sewage chamber 110 is slightly dirty, the opening degree of the water spray nozzle 142 can be adjusted smaller to avoid waste of water resources. When the inner wall of the sewage chamber 110 is severely dirty, the opening degree of the water spray nozzle 142 can be adjusted larger to ensure the cleaning effect. In this embodiment, by adjusting the opening degree of the water spray nozzle 142, precise control of the spraying behavior can be achieved, thereby ensuring the high efficiency and consistency of the cleaning effect. This adjustment method has high flexibility and can flexibly adjust the spraying behavior according to different degrees of dirtiness to meet diverse cleaning requirements.

[0124] In other embodiments, the spraying behavior includes the spraying temperature. Adjusting the spraying behavior of the first spraying is the first spraying behavior, and adjusting the spraying behavior of the second spraying is the second spraying behavior, including: adjusting the water supply temperature of the self-cleaning mechanism. There are various ways to adjust the water supply temperature. For example, a heater can be provided at the position of the water supply pipeline, and by controlling the operation of the heater, the adjustment of the water supply temperature can be achieved. For example, when the inner wall of the sewage chamber 110 is slightly dirty, the heater does not start, and clean water at ambient temperature is directly introduced into the self-cleaning mechanism for cleaning, thereby reducing the energy consumption during the self-cleaning process. When the inner wall of the sewage chamber 110 is severely dirty, the heater starts to heat the clean water, and hot water at a higher temperature is supplied to the cleaning mechanism to ensure the self-cleaning effect.

[0125] In some other embodiments, the spraying behavior can also be at least two of the spraying pressure, the opening degree of the water spray nozzle, and the spraying temperature. The specific adjustment method of the spraying behavior can refer to the relevant descriptions in the above embodiments. In still some other embodiments, the spraying behavior can also simultaneously include the spraying pressure, the opening degree of the water spray nozzle, and the spraying temperature, etc.

[0126] The following embodiments introduce the structure of the sewage tank 100 involved in the above embodiments.

[0127] Please refer to Figures 1 to 3, in an embodiment of the present invention, the sewage tank 100 includes a sewage chamber 110, a tank cover 120, a water inlet channel 130, and a self-cleaning mechanism 140. The sewage tank 100 further includes a tank body 117, and the inner cavity of the tank body 117 forms the sewage chamber 110. The sewage chamber 110 can adopt an integral cavity structure or be composed of multiple independent cavities, as long as it meets the functional requirements for collecting sewage during the cleaning process. The shape of the sewage chamber 110 can be any geometric shape such as a cylindrical shape, a cuboid shape, or a semi-cylindrical shape. The top of the sewage chamber 110 has an opening 111, and the specific form of the opening 111 includes but is not limited to a partial opening structure (such as a round hole or a square hole formed at the top), a fully open structure (i.e., the entire top serves as the opening), etc. Optionally, in this embodiment, a fully open top opening design is adopted. Such a setting can obtain a larger opening area of the opening 111 on the sewage chamber 110, facilitating the installation and maintenance of the internal components of the sewage tank 100.

[0128] Please refer to Figure 1 , Figure 4 and Figure 5 , the tank cover 120 is detachably covered on the opening 111, that is, the tank cover 120 and the tank body 117 are detachably connected. There are various specific implementation manners for the detachable connection. In one embodiment, a clamping groove can be provided at the peripheral position of the tank body 117 close to the opening 111, and an elastic clamping protrusion is provided at the corresponding position of the tank cover 120. Through the cooperation of the clamping groove and the elastic clamping protrusion, the tank cover 120 is detachably covered on the opening 111. In another embodiment, the tank cover 120 and the tank body 117 can also be connected by dismounting and installing fasteners (such as bolts, screws, etc.) to realize the detachable covering of the tank cover 120 on the opening 111.

[0129] Please refer to Figure 4 and Figure 5 , the water inlet channel 130 is arranged on the tank cover 120. The water inlet channel 130 has a water outlet 132 and a water inlet 131, and the water inlet 131 can be connected to a clean water supply pipeline. The water inlet channel 130 can be a separate pipeline structure, and is fixedly connected to the tank cover 120 through a mounting member (such as a pipe clamp, etc.). The water inlet channel 130 can also be directly integrally injection-molded or cast with the tank cover 120 through a mold, that is, form an integral structure with the tank cover 120. Since the water inlet channel 130 is arranged on the tank cover 120, the disassembly and assembly of the water inlet channel 130 can be realized by disassembling and assembling the tank cover 120.

[0130] Please refer to Figure 3 , Figure 5 , Figure 8 and Figure 10, The self-cleaning mechanism 140 is disposed on the lid 120 and is located inside the sewage chamber 110. The self-cleaning mechanism 140 includes a water supply port 141 and a water spraying port 142. The water spraying port 142 is communicated with the water supply port 141, and the water supply port 141 is communicated with the water outlet 132. The clear water flowing out of the clear water supply pipeline enters the water inlet channel 130 from the water inlet 131, then flows into the water supply port 141 from the water outlet 132, and finally sprays out from the water spraying port 142. Among them, the reverse thrust generated when the clear water sprays out from the water spraying port 142 drives the self-cleaning mechanism 140 to rotate relative to the sewage chamber 110, so as to spray the clear water onto the chamber wall of the sewage chamber 110.

[0131] The specific structure of the self-cleaning mechanism 140 is not limited. In one embodiment, the self-cleaning mechanism 140 can be a rod structure with one end rotatably connected to the lid 120 and the other end being horizontally arranged, and the water spraying holes are arranged at the end of the rod structure. When the water spraying holes spray water, a reverse thrust is generated on the end of the rod structure, thereby driving the rod structure to rotate and realizing the rotary spraying on the chamber wall of the sewage chamber 110. In some other embodiments, the self-cleaning mechanism 140 can also be a hollow cylindrical cavity structure with one end rotatably connected to the lid 120 and the other end, and a plurality of water spraying holes are arranged on the circumferential chamber wall of the hollow cylindrical cavity. When the water spraying holes spray water, a reverse rotary thrust is generated on the circumferential chamber wall of the hollow cylindrical cavity, thereby driving the hollow cylindrical cavity structure to rotate and realizing the rotary spraying on the chamber wall of the sewage chamber 110.

[0132] In this embodiment, by arranging the self-cleaning mechanism 140 in the sewage chamber 110 and using the rotational movement of the self-cleaning mechanism 140 in the sewage chamber 110, the clear water sprays out from the water spraying port 142 and flushes the chamber wall of the sewage chamber 110 from multiple angles, so as to achieve full coverage of all areas of the chamber wall of the sewage chamber 110. Such a setting can effectively clean the residual dirt on the chamber wall of the sewage chamber 110 and realize the automatic cleaning of the sewage chamber 110. Since the entire cleaning process can be carried out automatically, the cumbersome operation of traditional manual cleaning can be avoided, thereby improving the convenience of cleaning the sewage tank 100. At the same time, such a multi-angle spraying method can also improve the cleaning effect of the sewage chamber 110 and ensure that the chamber wall of the sewage chamber 110 is thoroughly cleaned. In addition, since the self-cleaning mechanism 140 is driven to rotate by the water spraying reaction force, there is no need to additionally set a driving motor or a transmission device, which not only reduces energy consumption and the number of parts, but also avoids the failure risk caused by the contact of electric components with sewage, and improves the durability of the self-cleaning mechanism 140.

[0133] Please refer to Figures 7 to 10, in an embodiment of the present invention, the self-cleaning mechanism 140 includes a rotating arm 143. The rotating arm 143 is rotatably mounted on the lid 120, and the water spray nozzle 142 is provided on the rotating arm 143. The way the rotating arm 143 is rotatably mounted on the lid 120 is not limited. For example, the rotating arm 143 can be rotatably mounted on the lid 120 through a bearing, or can be rotatably mounted on the lid 120 through a self-lubricating bushing, etc. The rotating arm 143 can be vertically mounted on the lid 120, that is, the axis of rotation of the rotating arm 143 is parallel to the height direction of the sewage tank 100 (such as Figure 7 shown by the Z-axis direction in Figure 7 ). The rotating arm 143 can also be inclinedly mounted on the lid 120, that is, the axis of rotation of the rotating arm 143 is inclined with respect to the height direction of the sewage tank 100. Optionally, in an embodiment, please refer to

[0134] Please refer to Figure 8 and Figure 10 , the rotating arm 143 is vertically mounted on the lid 120, which is convenient for the positioning and installation between the rotating arm 143 and the lid 120, and reduces the processing and assembly difficulty. The water spray nozzles 142 can be distributed in multiple along the length direction or height direction of the rotating arm 143, or only one can be provided, specifically depending on meeting the cleaning requirements of the sewage chamber 110.

[0135] Please refer to Figures 8 to 10 , in an embodiment of the present invention, the rotating arm 143 includes a rotating shaft 1432 and a rod body 1433. One end of the rotating shaft 1432 is rotatably connected to the lid 120, and the other end of the rotating shaft 1432 is connected to the rod body 1433. The water spray nozzle 142 is provided on the rod body 1433. The rotating shaft 1432 can be rotatably connected to the lid 120 in any way such as through a bearing, a self-lubricating bushing, or shaft-hole fit, and this embodiment is not limited thereto.

[0136] Please refer to Figures 8 to 10, inside the sewage chamber 110, along the height direction of the sewage tank 100, the rotating shaft 1432 is arranged on the side close to the tank cover 120, and the rod body 1433 is arranged on the side far from the tank cover 120. Specifically, please refer to Figure 5 and Figure 10 , the rod body 1433 includes a mounting portion 14331 and two extension segments 14332. The two extension segments 14332 are symmetrically arranged on both sides of the mounting portion 14331. The mounting portion 14331 has an approximately cylindrical structure and is butt-connected to the rotating shaft 1432. The extension segment 14332 can adopt any shape such as a round rod, a rectangular rod or a multi-prismatic rod. In this embodiment, the extension segment 14332 is a round rod structure. The round rod has a symmetrical shape and a uniform center of gravity distribution, and can maintain good dynamic balance during rotation, reducing the vibration and sway generated during the rotation of the rod body 1433.

[0137] In the above embodiment, by connecting one end of the rotating shaft 1432 to the tank cover 120 and the other end to the rod body 1433, the structural layout of the entire rotating arm 143 can be made more compact, better adapting to the limited space inside the tank cover 120 and avoiding occupying too much installation space. At the same time, since the water spray port 142 is arranged on the rod body 1433, by adjusting the setting position of the water spray port 142 on the rod body 1433, the water spray path generated during the rotation of the rod body 1433 can be adjusted, so as to better cover each area of the wall of the sewage chamber 110 and improve the cleaning effect. In addition, by adjusting the number of the water spray ports 142, the water flow rate and pressure can be changed, and further the rotation speed and cleaning efficiency of the rod body 1433 can be adjusted. Such a design enables the self-cleaning mechanism 140 to better adapt to the cleaning requirements of sewage chambers 110 of different shapes and sizes, enhancing the adaptability and flexibility of the self-cleaning mechanism 140.

[0138] Please refer to Figure 8 and Figure 9 , in an embodiment of the present invention, the water flow channel 1431 includes a first channel 14311 and a second channel 14312 that are interconnected. The first channel 14311 extends along the axial direction of the rotating shaft 1432. The upper part of the first channel 14311 penetrates through the rotating shaft 1432 and is communicated with the water supply port 141. The lower part of the first channel 14311 is communicated with one end of the second channel 14312. It should be noted that the upper and lower parts of the first channel 14311 refer to the height direction of the sewage chamber 110. The end close to the water outlet 132 is the upper part, and the end far from the water outlet 132 is the lower part. The other end of the second channel 14312 extends along the length direction of the rod body 1433, and the water spray port 142 is arranged on the side wall of the second channel 14312.

[0139] By making the first channel 14311 extend along the axial direction of the rotating shaft 1432 and the second channel 14312 extend along the length direction of the rod body 1433, it is not only convenient for the conformal design of the first channel 14311 and the second channel 14312, but also can reduce the number of bends generated by the water flow channel 1431, thereby reducing the pressure drop generated when the clear water flows in the water flow channel 1431. At the same time, since the water spray nozzle 142 is arranged on the side wall of the second channel 14312, the water spray nozzle 142 can be arranged closer to the cavity wall of the sewage cavity 110, shortening the spraying distance, enhancing the water flow impact force, and making the cleaning effect of the cavity wall of the sewage cavity 110 better.

[0140] Please refer to Figure 8 and Figure 11 In an embodiment of the present invention, the box cover 120 includes a receiving cavity 123. The rotating shaft 1432 is rotatably installed in the receiving cavity 123, and the rod body 1433 extends to the outside of the receiving cavity 123. The receiving cavity 123 is a cylindrical shape adapted to the shape of the rotating shaft 1432, and the rotating shaft 1432 is coaxially arranged with the receiving cavity 123. Along the height direction of the sewage cavity 110, the opening of the receiving cavity 123 faces the bottom wall of the sewage cavity 110. The rotating shaft 1432 may be partially located in the receiving cavity 123 or entirely located in the receiving cavity 123. Optionally, in this embodiment, along the height direction of the sewage cavity 110, the rotating shaft 1432 is completely located in the receiving cavity 123, that is, the depth of the receiving cavity 123 is greater than the axial length of the rotating shaft 1432. At least a part of the mounting portion 14331 of the rod body 1433 extends into the receiving cavity 123 to be butt-connected with the rotating shaft 1432. The extension sections 14332 on both sides of the mounting portion 14331 are located outside the receiving cavity 123.

[0141] Please refer to Figure 8 As shown in, the water outlet 132 is arranged on the top wall of the receiving cavity 123, and the water supply port 141 is arranged at one end of the rotating shaft 1432 away from the rod body 1433 and is vertically butt-connected and communicated with the water outlet 132. It should be noted that the up and down directions here refer to the height direction of the sewage tank 100. Specifically, the water outlet 132 is a cylindrical hole and is coaxially arranged with the receiving cavity 123. The water supply port 141 is a conical hole and is coaxially arranged with the rotating shaft 1432. The end with the larger diameter of the conical hole is butt-connected with the water outlet 132 so that the clear water flowing out of the water outlet 132 can fall into the water supply port 141.

[0142] In the above embodiments, by installing the rotating shaft 1432 in the accommodating cavity 123 and extending the rod body 1433 outside the accommodating cavity 123, the layout of the entire self-cleaning mechanism 140 in the height direction of the sewage cavity 110 is made more compact. This design can make full use of the internal space of the sewage tank 100 and avoid unnecessary space waste. At the same time, since the rotating shaft 1432 is installed in the accommodating cavity 123, the accommodating cavity 123 can provide more stable support for the rotating shaft 1432. Therefore, the shaking and vibration during the rotation of the rotating arm 143 can be reduced, and the stability of the rotation operation of the self-cleaning mechanism 140 can be improved. In addition, by arranging the water outlet 132 on the top wall of the accommodating cavity 123 and the water supply port 141 on the rotating shaft 1432 and making the two communicate vertically, the water flow transmission between the water outlet 132 and the water supply port 141 during the rotation of the rotating shaft 1432 can be directly realized without additionally arranging a complex rotating joint. Therefore, the structural design can be simplified, and the manufacturing costs of processing and assembly can be reduced.

[0143] Please refer to Figure 8 and Figure 10 , in an embodiment of the present invention, the rotating shaft 1432 and the rod body 1433 are connected by a clamping structure 150. Specifically, the rotating shaft 1432 is clamped and connected to the mounting portion 14331 of the rod body 1433. There can be various types of clamping structures 150. In one embodiment, the clamping structure 150 can be an elastic clamping jaw and a clamping groove. One of the elastic clamping jaw and the clamping groove is arranged on the rotating shaft 1432, and the other is arranged on the mounting portion 14331. Through the clamping of the elastic clamping jaw and the clamping groove, the clamping connection between the rotating shaft 1432 and the mounting portion 14331 is realized, that is, the clamping connection between the rotating shaft 1432 and the rod body 1433 is realized. In another embodiment, the clamping structure 150 can also be a tapered hole and a tapered body. One of the tapered hole and the tapered body is arranged on the rotating shaft 1432, and the other is arranged on the mounting portion 14331. Through the insertion of the tapered hole between the tapered hole and the tapered body, the clamping connection between the rotating shaft 1432 and the mounting portion 14331 is realized, that is, the clamping connection between the rotating shaft 1432 and the rod body 1433 is realized.

[0144] In the above embodiments, by using the clamping structure 150 to connect the rotating shaft 1432 and the rod body 1433, the quick separation of the rotating shaft 1432 and the rod body 1433 can be realized, forming a modular design. When the water spray hole 142 is blocked, the rod body 1433 can be directly disassembled for cleaning, avoiding the cumbersome process of overall disassembly of the rotating shaft 1432 in the traditional design, and significantly reducing the maintenance complexity. At the same time, by connecting the rotating shaft 1432 and the rod body 1433 through the clamping structure 150, the disassembly and assembly can be completed without special tools, and the disassembly and assembly steps are simple and the efficiency is high.

[0145] Please refer to Figure 8 and Figure 10, in an embodiment of the present invention, the clamping structure 150 includes a clamping block 151 and a clamping groove 152. The clamping block 151 is correspondingly clamped with the clamping groove 152, and the clamping block 151 and the clamping groove 152 are respectively arranged on the rotating shaft 1432 and the rod body 1433. Specifically, the clamping block 151 and the clamping groove 152 are respectively arranged on the mounting portion 14331 of the rotating shaft 1432 and the rod body 1433. In one embodiment, please refer to Figure 8 , the clamping block 151 is arranged at one end of the rotating shaft 1432 facing the rod body 1433, and the clamping groove 152 is arranged at one end of the mounting portion 14331 facing the rotating shaft 1432. The clamping block 151 can be an annular structure surrounding the rotating shaft 1432, or a structure of a plurality of clamping blocks 151 spaced apart on the outer periphery of the rotating shaft 1432. The shape structure of the clamping groove 152 matches the shape structure of the clamping block 151 to achieve the clamping connection between the clamping groove 152 and the clamping block 151. Optionally, in this embodiment, the clamping block 151 is an annular block structure surrounding the rotating shaft 1432, and the clamping groove 152 is an annular groove structure surrounding the mounting portion 14331. In some other embodiments, it can also be that the clamping groove 152 is arranged at one end of the rotating shaft 1432 facing the rod body 1433, and the clamping block 151 is arranged at one end of the mounting portion 14331 facing the rotating shaft 1432. By using the clamping structure 150 of the clamping block 151 and the clamping groove 152 to connect the rotating shaft 1432 and the rod body 1433, not only can the disassembly and assembly between the rotating shaft 1432 and the rod body 1433 be facilitated, and the stability and reliability of the connection between the rod body 1433 and the rotating shaft 1432 be improved, but also the structures of the clamping block 151 and the clamping groove 152 are relatively simple and convenient for processing and manufacturing. Therefore, it is beneficial to reduce the processing cost.

[0146] Please refer to Figure 8 and Figure 10 , in an embodiment of the present invention, the rotating shaft 1432 is rotatably mounted on the box cover 120 through a bearing 144. The bearing 144 can be any bearing that meets the support requirements, such as an angular contact bearing, a deep groove ball bearing, etc. The number of bearings 144 provided can be one or two. The bearing 144 can be fixedly connected to the box cover 120 through a bearing seat, or can be connected to the box cover 120 through other structures such as a fixing sleeve provided on the box cover 120. In this embodiment, the rotating shaft 1432 is rotatably mounted on the box cover 120 through a bearing 144. Since the bearing 144 is a standard part structure and its specification and model suspension range is relatively wide, it can be flexibly selected according to the requirements of the load, speed, accuracy, etc. of the rotating shaft 1432. At the same time, the standard bearing 144 has sufficient market supply and low procurement cost, which is beneficial to reducing the overall manufacturing cost.

[0147] Please refer to Figure 8 and Figure 13, in an embodiment of the present invention, the accommodation cavity 123 includes a blind hole section 1231 and a stepped section 1232 that are connected to each other. The blind hole section 1231 and the stepped section 1232 are coaxially arranged, and the stepped section 1232 is arranged closer to the opening of the accommodation cavity 123 relative to the blind hole section 1231. The rotating shaft 1432 includes a flange portion 14321 and a cylindrical portion 14322 that are connected to each other. The cylindrical portion 14322 connects the flange portion 14321 and the rod body 1433. The bearing 144 is installed in cooperation with the cylindrical portion 14322. The outer diameter of the cylindrical portion 14322 matches the inner diameter of the bearing 144, and the bearing 144 is sleeved on the cylindrical portion 14322 to form a mating connection. The flange portion 14321 is installed in the blind hole section 1231, and the bearing 144 is installed in the stepped section 1232. The outer diameter of the flange portion 14321 is greater than the inner diameter of the bearing 144, and at least a part of the end of the flange portion 14321 facing the stepped section 1232 contacts the end face of the bearing 144 to realize the axial support of the bearing 144 on the flange portion 14321.

[0148] In the above embodiment, the design enables the bearing 144 to effectively axially support the flange portion 14321. This axial support can prevent the rotating shaft 1432 from axially moving, thereby ensuring the position accuracy and stability of the rotating shaft 1432. At the same time, since the flange portion 14321 of the rotating shaft 1432 is installed in the blind hole section 1231 and the cylindrical portion 14322 is installed in cooperation with the bearing 144 in the stepped section 1232, this segmented structural cooperation design enables each component to be closely matched, thereby making full use of the installation height space, reducing the volume of the entire device, and being more conducive to the compact design of the structure.

[0149] Please refer to Figure 5 and Figure 8 , in an embodiment of the present invention, a sealing cover 160 is provided at the opening of the accommodation cavity 123. The sealing cover 160 supports the end of the bearing 144 facing away from the blind hole section 1231 and seals the installation gap between the bearing 144 and the stepped section 1232. The shape of the sealing cover 160 is adapted to the shape of the opening of the accommodation cavity 123. The sealing cover 160 covers the opening of the accommodation cavity 123, and the sealing cover 160 is provided with a through hole for the installation portion 14331 of the rotating shaft 1432 or the rod body 1433 to pass through. The sealing cover 160 can be fixedly covered on the opening of the accommodation cavity 123 by bolts or by a snap connection. Optionally, in this embodiment, please refer to Figure 8The accommodating chamber 123 is provided with an annular protrusion 1233 at the opening, and the sealing cover 160 is provided with an annular groove 161 at one end facing the accommodating chamber 123. The annular protrusion 1233 is correspondingly engaged in the annular groove 161, thereby realizing the clamping and fixing connection between the sealing cover 160 and the accommodating chamber 123. This arrangement facilitates the disassembly and assembly of the sealing cover 160, and further facilitates the maintenance and replacement of the bearing 144 and the rotating shaft 1432 installed inside the accommodating chamber 123.

[0150] In the above embodiment, since the sealing cover 160 is provided at the opening of the accommodating chamber 123, the sealing cover 160 can seal the installation gap between the bearing 144 and the accommodating chamber 123, thereby reducing the risk of clean water at the water supply port 141 leaking from the installation gap of the bearing 144, and ensuring the stability of the water spraying amount of the water spraying port 142. At the same time, the sealing cover 160 can also prevent the sewage and dust in the sewage chamber 110 from entering between the bearing 144 and the accommodating chamber 123, thereby reducing the wear of the bearing 144 and ensuring the normal operation of the bearing 144. In addition, since the sealing cover 160 forms a support for the end of the bearing 144 away from the blind hole section 1231, this can not only improve the axial positioning accuracy of the bearing 144 and reduce the risk of the bearing 144 falling off, but also enable the axial force of the bearing 144 to be transmitted to the main structure of the accommodating chamber 123 through the sealing cover 160, further enhancing the axial stability of the bearing 144 and reducing axial deformation and wear.

[0151] See also Figure 15, in an embodiment of the present invention, the water spray nozzles 142 are arranged at both ends of the rod body 1433 in the length direction, and the water spray direction of the water spray nozzles 142 is arranged at an angle with the length direction of the rod body 1433. The specific size of the angle is not limited, as long as it is ensured that the reaction force generated by the water spray nozzles 142 when spraying can drive the rod body 1433 to rotate. Specifically, water spray nozzles 142 are arranged at both ends of the rod body 1433 in the length direction, that is, water spray nozzles 142 are arranged on the extension sections 14332 on both sides of the installation part 14331. The number of water spray nozzles 142 arranged on each side of the extension section 14332 can be equal or unequal. The angles between the water spray directions of the water spray nozzles 142 on each side of the extension section 14332 and the length direction of the rod body 1433 can be equal or unequal. It needs to be determined according to the rotation speed requirement of the rod body 1433 during actual design. With this setting, when the water spray nozzles 142 spray water, reaction forces can be generated at both ends of the rod body 1433 to drive the rod body 1433 to rotate. In another embodiment, the water spray nozzles 142 can also be arranged only at one end of the rod body 1433 in the length direction, and the water spray direction of the water spray nozzles 142 is arranged at an angle with the length direction of the rod body 1433. Specifically, the water spray nozzles 142 are arranged only on one side of the extension section 14332. With this setting, when the water spray nozzles 142 spray water, a reaction force can be generated at one end of the rod body 1433 to drive the rotation of the rod body 1433.

[0152] In the above embodiment, the water spray nozzles 142 are arranged at at least one end of the rod body 1433 in the length direction, and the water spray direction of the water spray nozzles 142 is arranged at an angle with the length direction of the rod body 1433. This design can not only utilize the water spray reaction force to realize the self-driven rotation of the rod body 1433, but also form a composite water flow with axial and radial components along the rod body 1433, thereby breaking through the limitations of the traditional direct spray method, extending the water flow coverage range from the axial direction of the rod body 1433 to the circumferential area, and further realizing the all-round cleaning of the inner wall of the sewage chamber 110.

[0153] Please refer to Figure 15, in an embodiment of the present invention, there are two water spray nozzles 142, and the two water spray nozzles 142 are respectively arranged at both ends of the rod body 1433 in the length direction, and the water spray directions of the two water spray nozzles 142 are opposite. Specifically, the two water spray nozzles 142 are respectively arranged on the extension sections 14332 on both sides of the installation part 14331. The water spray direction of the water spray nozzle 142 can be perpendicular to the length direction of the rod body 1433, or can be set at a non-perpendicular angle to the length direction of the rod body 1433. Optionally, in this embodiment, the water spray direction of the water spray nozzle 142 is perpendicular to the length direction of the rod body 1433. It should be noted that in this embodiment, the water spray direction of the water spray nozzle 142 being perpendicular to the length direction of the rod body 1433 means that on the projection of the rod body 1433 in the height direction of the sewage chamber 110, the water spray direction of the water spray nozzle 142 is perpendicular to the length direction of the rod body 1433.

[0154] In the above embodiment, the two water spray nozzles 142 are respectively arranged at both ends of the rod body 1433 in the length direction, and the water spray directions are opposite. With such a setting, the reaction forces generated by the two water spray nozzles 142 arranged in opposite directions on the rod body 1433 are balanced with each other, so that the rod body 1433 can obtain a more stable and uniform rotational torque, and avoid vibration or deflection caused by unilateral force. At the same time, the design of reverse water spraying at both ends enables the water flow to act on both sides of the rod body 1433 in the length direction at the same time, and can realize synchronous cleaning of the two side areas of the sewage chamber 110, thereby improving the cleaning efficiency.

[0155] Please participate in Figure 3 and Figure 5 , in an embodiment of the present invention, two self-cleaning mechanisms 140 are arranged on the box cover 120, and the water inlet channel 130 is provided with two water outlets 132, and one self-cleaning mechanism 140 corresponds to one water outlet 132. The specific arrangement positions of the two self-cleaning mechanisms 140 on the box cover 120 are not limited. For example, the two self-cleaning mechanisms 140 can be arranged along the length direction of the box cover 120 (such as Figure 2 described by the X-axis in Figure 2are arranged as shown by the Y-axis in the figure, or arranged along the diagonal direction of the box cover 120, etc., specifically subject to meeting the requirements for cleaning the cavity wall of the sewage cavity 110. In some other embodiments, more than two self-cleaning mechanisms 140 may be provided on the box cover 120. For example, the number of self-cleaning mechanisms 140 provided may be three, four, etc. By providing two or more self-cleaning mechanisms 140 on the box cover 120, and each self-cleaning mechanism 140 corresponding to one water outlet 132, more comprehensive coverage cleaning of the sewage cavity 110 can be achieved. Compared with the solution of providing one self-cleaning mechanism 140, the solution of providing two or more self-cleaning mechanisms 140 can simultaneously clean different areas of the cavity wall of the sewage cavity 110, thereby improving the cleaning efficiency and shortening the cleaning time.

[0156] Please refer to Figure 3 and Figure 12 , in an embodiment of the present invention, the water inlet channel 130 includes two water outlets 132, and the two water outlets 132 are respectively arranged at both ends of the extending direction of the water inlet channel 130, and the water inlet 131 is located between the two water outlets 132. The water inlet 131 may be arranged at the exact middle position between the two water outlets 132, or may be located at a position close to one of the water outlets 132. Optionally, in this embodiment, the water inlet 131 is approximately located at the exact middle position between the two water outlets 132. This can not only ensure the positioning and processing of the water inlet 131 on the water inlet channel 130, but also make the distribution of the water flow to the two water outlets 132 more uniform, avoiding the problem of excessive or too small water flow on one side, so as to improve the stability and consistency of the water flow at the two spray nozzles 142.

[0157] Please refer to Figures 16 to 19In one embodiment of the present invention, the box cover 120 includes a cover body 121 and a cover plate 122. The shape of the cover body 121 matches the shape of the opening 111 of the sewage chamber 110, so as to cover the opening 111 of the sewage chamber 110. The cover body 121 is provided with a groove 1211, and the cover plate 122 covers the groove 1211, so that the groove 1211 and the cover plate 122 jointly define at least a part of the water inlet channel 130. The groove 1211 can be arranged on the side of the cover body 121 facing the sewage chamber 110, or it can be arranged on the side of the cover body 121 away from the sewage chamber 110. Optionally, in one embodiment, the groove 1211 is arranged on the side of the cover body 121 away from the sewage chamber 110. This arrangement makes it convenient to open the cover plate 122 for cleaning when the groove 1211 is blocked. The cross-sectional shape of the groove 1211 can be a variety of shapes such as a rectangle, a semicircle, and a U shape. The length of the groove 1211 may be equal to the length of the water inlet channel 130, that is, the entire water inlet channel 130 is formed by the groove 1211 and the cover plate 122. The length of the groove 1211 may also be less than the length of the water inlet channel 130, that is, only a portion of the water inlet channel 130 is formed by the groove 1211 and the cover plate 122. Figure 12 , Figure 13 and Figure 18 In this embodiment, the cross section of the groove 1211 is a rectangular cross section, and the length of the groove 1211 is less than the length of the water inlet channel 130. Specifically, along the extension direction of the water inlet channel 130, a through hole section 134 is respectively provided at both ends of the length direction of the groove 1211, and the through hole section 134 is integrally formed inside the cover body 121, and each through hole section 134 forms a corresponding water outlet 132. For the convenience of description, the part of the water inlet channel 130 defined by the groove 1211 and the cover plate 122 is marked as a groove section 133. In this embodiment, the water inlet channel 130 includes a groove section 133 and a through hole section 134 connected to both ends of the groove section 133. Such a configuration can not only facilitate the processing and forming of the water inlet channel 130, but also facilitate the water inlet channel 130 to form a water outlet 132 at the position of the accommodating cavity 123, thereby improving the rationality of the structure of the water inlet channel 130 and the convenience of manufacturing.

[0158] In the above embodiments, the structure in which the groove 1211 cooperates with the cover plate 122 to form the water inlet channel 130 is simpler to process compared to integrally forming a closed tubular channel on the cover body 121. Moreover, the groove 1211 can be formed on the cover body 121 through various processes such as injection molding and stamping, without the need for complex internal cavity molds or additional pipe assemblies, thereby reducing the production cost of the water inlet pipe 114 and improving production efficiency. At the same time, when the water inlet channel 130 is blocked, it is only necessary to open the cover plate 122 to directly clean the dirt in the groove 1211, without disassembling the entire box cover 120 or using special tools to dredge. This open structure is convenient for inspection and maintenance, can quickly restore the smoothness of the water inlet channel 130, and improve the maintainability and long-term use reliability of the water inlet channel 130.

[0159] Please refer to Figure 3 、 Figure 11 、 Figure 12 and Figure 17 In an embodiment of the present invention, the box cover 120 further includes a convex portion 124, the convex portion 124 is provided on the cover body 121, and the convex portion 124 extends along the length direction of the water inlet channel 130. The convex portion 124 can be provided on the side of the cover body 121 facing the inside of the sewage chamber 110, or can be provided on the side of the cover body 121 facing away from the inside of the sewage chamber 110. Optionally, in this embodiment, the convex portion 124 is provided on the side of the cover body 121 facing the inside of the sewage chamber 110. The shape of the convex portion 124 corresponds to the shape of the water inlet channel 130. For example, when the water inlet channel 130 is linear, the convex portion 124 is a corresponding linear shape. When the water inlet channel 130 is bent (such as an S shape), the convex portion 124 is a corresponding bent shape. A hollow cavity is formed between the convex portion 124 and the cover body 121, and the hollow cavity forms the water inlet channel 130. In one embodiment, along the thickness direction of the box cover 120, a groove may be provided on the side of the convex portion 124 facing the cover body 121, and the cover body 121 is covered on the groove to form a hollow cavity. In another embodiment, a groove may also be provided on the side of the cover body 121 facing the convex portion 124, and the convex portion 124 is covered on the groove to form a hollow cavity. In this embodiment, the specific forming structure of the hollow cavity is not limited.

[0160] In the above embodiments, the setting of the convex portion 124 only increases the thickness in a local area of the cover body 121, rather than thickening the entire cover body 121 as a whole. This local thickening method will not significantly increase the weight of the cover body 121, which is beneficial to realizing lightweight design. At the same time, the locally thickened convex portion 124 is beneficial to increasing the cross-sectional area of the water inlet channel 130, thereby increasing the water inlet flow rate and meeting the demand for a larger water inlet flow rate of the self-cleaning mechanism 140. At the same time, the convex portion 124 can also act as a reinforcing rib to enhance the rigidity of the cover body 121, and thus can improve the anti-deformation ability of the cover body 121.

[0161] Please refer to Figure 11 、 Figure 16 and 17. In an embodiment of the present invention, along the thickness direction of the lid 120, the convex portion 124 is located on the side of the groove 1211 away from the cover plate 122. Along the thickness direction of the cover body 121, the projection of the convex portion 124 covers the projection of the groove 1211. The convex portion 124 is arranged on the side of the groove 1211 away from the cover plate 122, so that the convex portion 124 is located inside the sewage chamber 110 instead of outside the lid 120. This layout can reduce the height space occupied by the convex portion 124 outside the lid 120, thereby making the overall external dimensions of the lid 120 more compact and saving the external space during installation and use. At the same time, since the projection of the convex portion 124 covers the projection of the groove 1211, such an arrangement can ensure that the width of the convex portion 124 (as shown in the X2 direction in Figure 17 ) can completely cover the entire width of the groove 1211 (as shown in the X3 direction in Figure 17 ), so that the convex portion 124 can provide enough space for the groove 1211 to keep it at a relatively large depth, which is beneficial to increasing the cross-sectional area of the water inlet channel 130.

[0162] Please refer to Figure 3 、 Figure 11 、 Figure 18 and Figure 19 . In an embodiment of the present invention, the cover body 121 is provided with a groove 1211, and the cover plate 122 covers the groove 1211. Along the thickness direction of the cover body 121, the convex portion 124 is arranged on the side of the cover body 121 facing the inside of the sewage chamber 110, that is, the convex portion 124 is located inside the sewage chamber 110. The cover plate 122 is arranged on the side of the cover body 121 facing the outside of the sewage chamber 110, that is, the opening of the groove 1211 faces the outside of the sewage chamber 110. The cover plate 122 covers the groove 1211, and the cover plate 122 is located outside the sewage chamber 110. On the side of the cover body 121 facing the outside of the sewage chamber 110, the surface of the cover plate 122 facing the outside of the sewage chamber 110 is flush with the surface of the cover body 121 facing the outside of the sewage chamber. By arranging the convex portion 124 on the side of the cover body 121 facing the inside of the sewage chamber 110, the internal space of the sewage chamber 110 can be fully utilized, and the exposure of the convex portion 124 can be avoided from affecting the flatness of the external structure of the lid 120. At the same time, on the side of the cover body 121 facing the outside of the sewage chamber 110, the surface of the cover plate 122 facing the outside of the sewage chamber 110 is flush with the surface of the cover body 121 facing the outside of the sewage chamber 110, so that the cover plate 122 and the outer surface of the cover body 121 can form a flush structure, which can not only ensure the aesthetics of the outside of the lid 120, but also avoid the problem of space interference that may be caused by external protrusions.

[0163] Please refer to Figure 17 and Figure 19, in an embodiment of the present invention, a positioning platform 12111 is provided at the opening edge of the groove 1211. The shape of the positioning platform 12111 is adapted to the contour shape of the cover plate 122, and at least a part of the peripheral edge of the cover plate 122 overlaps on the positioning platform 12111. Specifically, along the width direction of the groove 1211, a step surface is respectively provided on both sides of the opening edge position of the groove 1211, and the step surfaces on both sides together form the positioning platform 12111. Both sides in the width direction of the cover body 121 overlap on the corresponding step surfaces respectively, thereby realizing the overlapping fit between the cover plate 122 and the positioning platform 12111. By providing the positioning platform 12111, the positioning platform 12111 can play a positioning and guiding role when the cover plate 122 covers the groove 1211, so that the cover plate 122 can be quickly and accurately installed in place, improving the assembly efficiency of the cover plate 122. At the same time, the positioning function of the positioning platform 12111 can also provide stable support for the cover plate 122, reducing the probability that the cover plate 122 loosens or shifts under external forces during use, and further improving the stability of the covering effect of the groove 1211.

[0164] Please refer to Figure 20 and Figure 21 , in an embodiment of the present invention, a clean water inlet 112 is provided on the side wall of the sewage chamber 110 (i.e., the side wall of the box body 117), and the clean water inlet 112 is communicated with the water inlet 131. The clean water inlet 112 can be provided on any side wall body of the circumferential side wall of the sewage chamber 110. For example, it can be provided on any side wall on both sides in the length direction of the sewage chamber 110, or it can be provided on any side wall on both sides in the width direction of the sewage chamber 110. Optionally, in this embodiment, the clean water inlet 112 is provided on a side wall body in the width direction of the sewage chamber 110 (as shown by the Y1 direction in Figure 21 ), and the setting position of the clean water inlet 112 is approximately located in the middle area in the length direction of the sewage chamber 110 (as shown by the X1 direction in Figure 20 ). When the self-cleaning mechanism 140 needs to work, the clean water in the clean water supply pipeline will flow into the water inlet 131 through the clean water inlet 112, and then be transported to the inside of the self-cleaning mechanism 140 through the water inlet passage 130, thereby realizing the introduction of clean water inside the self-cleaning mechanism 140 to perform the first spraying and the second spraying on the cavity wall of the sewage chamber 110. As shown in Figure 20 , a sewage discharge port 113 is provided on the bottom wall of the sewage chamber 110, and the sewage discharge port 113 can be provided at the central position of the bottom wall, or can be provided at an eccentric position on the bottom wall, etc.

[0165] By providing a clean water inlet 112 on the side wall of the sewage chamber 110 and a sewage discharge port 113 on the bottom wall of the sewage chamber 110, on the one hand, it is convenient to set the clean water inlet 112 close to the opening 111 of the sewage chamber 110, so that the clean water inlet 112 can be set away from the bottom wall of the sewage chamber 110 inside the sewage chamber 110, avoiding sewage from entering the clean water inlet 112, preventing the clean water from being contaminated, and ensuring the cleanliness of the clean water. On the other hand, since the sewage generated after cleaning the chamber wall of the sewage chamber 110 and the impurities in the sewage chamber 110 will deposit at the bottom of the sewage chamber 110 under the action of gravity, providing a sewage discharge port 113 on the bottom wall of the sewage chamber 110 can effectively discharge the sewage and sediment, reducing the long-term deposition of sewage and dirt at the bottom of the sewage chamber 110 and improving the cleaning effect of the sewage tank 100.

[0166] Please refer to Figure 1 、 Figure 4 and Figure 5 In an embodiment of the present invention, the lid 120 is rotatably connected to the sewage chamber 110 and can be switched between a first position covering the opening 111 and a second position opening the opening 111. The rotatable connection method can be hinge connection, shaft connection, etc. Specifically, in this embodiment, as shown in Figure 4 and Figure 5 Two support shafts 1171 are arranged side by side at the edge position of the box body 117 close to the opening 111. Corresponding mounting holes 1201 are provided at the corresponding positions of the lid 120. Each support shaft 1171 is correspondingly inserted into a mounting hole 1201 and can rotate within the mounting hole 1201. When the lid 120 is switched between the first position (covering the opening 111) and the second position (opening the opening 111), the lid 120 drives itself to rotate along the axis of the mounting hole 1201 through the support shaft 1171, thereby realizing the rotatable connection between the lid 120 and the box body 117. This rotatable connection method has a simple structure, is convenient for installation and positioning. At the same time, it can also ensure the stable and reliable rotatable connection between the lid 120 and the box body 117.

[0167] Please refer to Figure 5 and Figure 21, a water inlet pipe 114 is further provided in the sewage chamber 110, and the water inlet pipe 114 communicates with the clean water inlet 112 and the water inlet 131. The water inlet pipe 114 can have various structures such as a bent pipe, a straight pipe, or a combination of a bent pipe and a straight pipe. The water inlet pipe 114 can be an overall rigid pipe structure, an overall flexible pipe structure, or a structure with part being a rigid pipe and part being a flexible pipe. Optionally, in this embodiment, the water inlet pipe 114 is an overall flexible pipe structure. The flexible water inlet pipe 114 (such as a rubber pipe, a corrugated pipe, or a silica gel pipe) has good bending and telescopic properties and can deform freely with the rotation of the lid 120, avoiding pipeline pulling, deformation, or interface loosening caused by the opening and closing of the lid 120, thereby ensuring the sealing performance and reliability of the water inlet passage 130.

[0168] In the above embodiment, the lid 120 is installed on the sewage chamber 110 by means of a rotational connection. This design enables the operator to quickly open the lid 120 for equipment maintenance, cleaning, or inspection without a complex disassembly and reinstallation process. For example, when it is necessary to clean the sediment in the sewage chamber 110 or inspect the internal equipment, the lid 120 only needs to be rotated to the second position, greatly improving the operation efficiency. A water inlet pipe 114 is provided in the sewage chamber 110, which can make the connection between the clean water inlet 112 and the water inlet 131 more convenient and fast. During installation, only the two ends of the water inlet pipe 114 need to be respectively connected to the clean water inlet 112 and the water inlet 131, and the operation is simple and easy to implement.

[0169] Please refer to Figure 22 and Figure 23 , in an embodiment of the present invention, a valve assembly 170 is provided at the sewage outlet 113, and in response to the docking of the sewage tank 100 with the cleaning base station, the valve assembly 170 opens the sewage outlet 113. In one embodiment, the valve assembly 170 can be an electromagnetic valve. An electromagnetic valve is a device that controls the opening and closing of a valve by controlling electromagnetic force. When the sewage tank 100 is docked with the cleaning base station, the cleaning base station can send an electrical signal to activate the electromagnetic valve, thereby opening the sewage outlet 113. In another embodiment, the valve assembly 170 can also be a pneumatic valve, and the pneumatic valve controls the opening and closing of the valve through air pressure. The cleaning base station can be equipped with an air pump and provide an air pressure signal when the sewage tank 100 is docked with the cleaning base station to drive the pneumatic valve to open the sewage outlet 113. In other embodiments, the valve assembly 170 can also be a mechanical valve. The mechanical valve can achieve opening and closing through physical contact or a mechanical structure. For example, the cleaning base station can be equipped with a cam or a push rod, and when the sewage tank 100 is docked with the cleaning base station, the cam or the push rod directly pushes the valve to open.

[0170] In the above embodiments, the valve assembly 170 can automatically respond to the docking of the sewage tank 100 and the cleaning base station, so as to realize the automatic opening of the sewage discharge port 113 without manual operation. This design not only effectively improves the opening efficiency of the sewage discharge port 113, but also reduces errors caused by improper manual operation, such as forgetting to open or close the sewage discharge port 113. Therefore, problems such as sewage leakage or equipment damage caused by operation errors can be avoided.

[0171] Please refer to Figure 22 and Figure 23 , in an embodiment of the present invention, the valve assembly 170 includes a baffle 171 and a push rod 172. The baffle 171 is rotatably connected to the wall of the sewage chamber 110, and the push rod 172 is slidably disposed in the sewage chamber 110. The baffle 171 can be disposed inside the sewage chamber 110 or outside the sewage chamber 110. Optionally, in this embodiment, the baffle 171 is disposed outside the sewage chamber 110. There are various ways for the baffle 171 to be rotatably connected to the sewage chamber 110, including but not limited to being rotatably connected through a rotating shaft. Optionally, in this embodiment, the baffle 171 is rotatably mounted on the wall of the sewage chamber 110 through a return rotating shaft 174. Specifically, the return rotating shaft 174 is fixedly connected to the wall of the sewage chamber 110. The baffle 171 includes a plate body 1711 and a docking portion 1712. Along the height direction of the sewage chamber 110, one end of the plate body 1711 is rotatably connected to the return rotating shaft 174, and the other end of the plate body 1711 is fixedly connected to the docking portion 1712, and the docking portion 1712 can be hermetically docked with the sewage discharge port 113.

[0172] Please refer to Figure 22 and Figure 23 , a chute 115 is provided in the sewage chamber 110, and both ends of the chute 115 penetrate through the opposite side walls in the width direction of the sewage chamber 110 respectively. At least a part of the push rod 172 is inserted into the chute 115, and the push rod 172 can slide along the extending direction of the chute 115 (i.e., the width direction of the sewage chamber 110). Specifically, the push rod 172 includes a sliding portion 1721 and a pushing portion 1722. One end of the sliding portion 1721 is inserted into the chute 115, and the other end of the sliding portion 1721 extends toward the side of the baffle 171 and is fixedly connected to the pushing portion 1722. The pushing portion 1722 is disposed outside the chute 115 and can interact with the baffle 171 during the sliding process of the sliding portion 1721 to push the baffle 171 to rotate.

[0173] Please refer to Figure 24, in response to the docking of the sewage tank 100 with the cleaning base station, the ejector rod mechanism 310 on the cleaning base station pushes the ejector rod 172 to slide along the extension direction of the chute 115, and the ejector rod 172 pushes the baffle 171 to rotate to open the sewage discharge port 113. It should be noted that in this embodiment, the specific structure of the ejector rod mechanism 310 on the cleaning base station is not limited. For example, the ejector rod mechanism 310 can be an electric ejector rod mechanism, a pneumatic ejector rod mechanism, a hydraulic ejector rod mechanism, or any other mechanism that can push the ejector rod 172 to slide in the chute 115 when the sewage tank 100 is docked with the cleaning base station.

[0174] In the above embodiment, the ejector rod mechanism 310 on the cleaning base station automatically pushes the ejector rod 172 to slide, and then pushes the baffle 171 to rotate to open the sewage discharge port 113, and the whole process does not require manual operation. This automated design can improve the convenience of opening the sewage discharge port 113, reduce manual intervention, especially in occasions where the sewage discharge port 113 needs to be opened frequently, and can effectively improve work efficiency.

[0175] Please refer to Figure 22 and Figure 23 , in an embodiment of the present invention, the valve assembly 170 further includes an elastic reset member 173, and the elastic reset member 173 can be a spring, a torsion spring, or other elastic members, etc. In response to the separation of the sewage tank 100 from the cleaning base station, the elastic reset member 173 drives the baffle 171 to rotate in the reverse direction to close the sewage discharge port 113. Optionally, in this embodiment, the elastic reset member 173 is a compression spring. Specifically, the box body 117 is provided with an avoidance cavity 116 at a position close to the sewage discharge port 113, the baffle 171 is arranged in the avoidance cavity 116 and can rotate in the avoidance cavity 116. The compression spring is arranged in the avoidance cavity 116, and both ends of the compression spring respectively abut against the baffle 171 and the cavity wall of the avoidance cavity 116. During the process of the ejector rod 172 pushing the baffle 171 to rotate and open the sewage discharge port 113, the compression spring is compressed and stores spring force. In response to the separation of the sewage tank 100 from the cleaning base station, the compression spring releases the spring force to drive the baffle 171 to rotate in the reverse direction to close the sewage discharge port 113.

[0176] In the above embodiment, the setting of the elastic reset member 173 can realize the automatic closing of the sewage discharge port 113. When the sewage tank 100 is separated from the cleaning base station, the elastic reset member 173 can drive the baffle 171 to rotate in the reverse direction to close the sewage discharge port 113, and the whole process does not require manual intervention. Therefore, this design can improve the efficiency of closing the sewage discharge port 113 and also enhance the convenience of the closing operation of the sewage discharge port 113.

[0177] Please refer to Figure 25 and Figure 26, in an embodiment of the present invention, the clean water inlet 112 on the sewage tank 100 is communicated with the overflow port 410 of the clean water tank 400. In an embodiment, the clean water tank 400 and the sewage tank 100 may be provided on the same device, for example, both are provided on the cleaning device. In some other embodiments, the sewage tank 100 may be provided on the cleaning device, and the clean water tank 400 may be provided on the cleaning base station. When the cleaning device is docked with the cleaning base station, the clean water inlet 112 and the overflow port 410 of the clean water tank 400. By communicating the clean water inlet 112 with the overflow port 410 of the clean water tank 400, when the water level in the clean water tank 400 exceeds the set height, the excess clean water will automatically flow out through the overflow port 410 and enter the clean water inlet 112, thereby realizing the clean water supply of the self-cleaning mechanism 140 inside the sewage chamber 110. Thus, there is no need to separately configure a water pump for the self-cleaning mechanism 140, and the entire water supply process of the self-cleaning mechanism 140 can share a water pump with the water injection process of the clean water tank 400. This setting not only simplifies the device structure but also reduces the manufacturing cost. At the same time, this design utilizes the natural overflow principle of the clean water tank 400 to achieve water supply, without consuming additional energy, and also has the effect of energy conservation and environmental protection.

[0178] The third aspect of the present application provides a cleaning device, which can be a floor washer, a sweeper, a cleaning robot, etc., but is not limited thereto. Taking the cleaning robot as an example, to exert its cleaning function, the cleaning device at least includes a body and a cleaning component, and the cleaning component is installed on the body for cleaning the surface to be cleaned. The cleaning component can be a disc mop, a roller mop, a track mop, etc. To improve the cleaning effect of the cleaning device, the cleaning component usually has a wet cleaning function.

[0179] Specifically, the cleaning device is provided with a clean water tank 400 and the sewage tank 100 in the above embodiment. The clean water tank 400 is used to supplement clean water to the cleaning component so that the cleaning piece can maintain a wet state during the cleaning operation and realize wet cleaning of the surface to be cleaned. The sewage tank 100 is used to store sewage, and the sewage generated by the cleaning component during the mopping process is pumped into the sewage tank 100. The sewage tank is self-cleaned by the self-cleaning method emphasized in the above embodiment.

[0180] The present invention also provides a cleaning base station, which is used to cooperate with the cleaning device in the above embodiment. The cleaning base station includes the sewage tank 100 in any of the above embodiments. When the cleaning device returns to the cleaning base station after completing the cleaning operation, the sewage generated by the cleaning device during the cleaning operation will be pumped back into the sewage tank 100. For the specific structure of the sewage tank 100 in this embodiment, please refer to the relevant description of the sewage tank 100 in the above embodiment, and it will not be repeated here. Since this cleaning base station adopts the technical solution of the above sewage tank 100 embodiment, it at least has the beneficial effects brought by the technical solution of the above embodiment.

[0181] In an embodiment of the cleaning base station of the present invention, the cleaning base station includes a clean water supply pipe, the clean water supply pipe communicates with the water inlet 131 and the overflow port 410 of the clean water tank 400, and the clean water tank 400 is arranged in the cleaning base station. In some other embodiments, the clean water tank 400 can also be arranged on the cleaning device. When the cleaning device is docked with the cleaning base station, the clean water supply pipe connects the water inlet 131 and the overflow port 410 of the clean water tank 400 to communicate. By making the water inlet 131 communicate with the overflow port 410 of the clean water tank 400, when the water level in the clean water tank 400 exceeds the set height, the excess clean water will automatically flow out through the overflow port 410 and be automatically transported to the water inlet 131 through the clean water supply pipe, so as to realize the clean water supply of the self-cleaning mechanism 140 inside the sewage chamber 110. Thus, there is no need to separately configure a water pump for the self-cleaning mechanism 140, and the entire water supply process of the self-cleaning mechanism 140 can share a water pump with the water injection process of the clean water tank 400. Such a setting not only simplifies the device structure but also reduces the manufacturing cost. At the same time, this design utilizes the natural overflow principle of the clean water tank 400 to realize water supply, without additional energy consumption, and also has the effect of energy conservation and environmental protection.

[0182] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A self-cleaning method for a sewage tank, characterized in that: The sewage tank (100) comprises a sewage cavity (110) and a self-cleaning mechanism (140) installed in the sewage cavity (110); a sewage outlet (113) is provided at the bottom of the sewage tank (100); the self-cleaning mechanism (140) is used to spray clean water onto the cavity wall of the sewage cavity (110); and the self-cleaning method comprises the following self-cleaning process: Controlling the sewage outlet (113) to open so as to drain the sewage in the sewage chamber (110), and controlling the sewage outlet (113) to close; Controlling the self-cleaning mechanism (140) to start and perform a first spraying on the cavity wall of the sewage cavity (110); When a first specified condition is met, the self-cleaning mechanism (140) is controlled to stop the first spraying, and the sewage outlet (113) is controlled to open; wherein the first specified condition indicates at least one of the capacity of the sewage chamber (110) or the amount of clean water sprayed; In response to the emptying of the sewage chamber (110), the self-cleaning mechanism (140) is controlled to start a second spraying on the chamber wall of the sewage chamber (110) until a second specified condition is met, and the self-cleaning mechanism (140) is controlled to stop the second spraying; wherein the second specified condition indicates the amount of clean water sprayed, and during the second spraying process, the sewage outlet (113) is kept open.

2. The self-cleaning method according to claim 1, characterized in that: The self-cleaning method further comprises the following steps: First information for characterizing the degree of contamination of the cavity wall of the sewage cavity (110) is determined, and the spraying behavior of the first spraying is adjusted based on the first information.

3. The self-cleaning method according to claim 2, characterized in that: The determining of first information for characterizing the degree of turbidity of the wall of the sewage chamber (110) comprises: The first information is determined based on first water quality information of the sewage in the sewage chamber (110) and / or the sewage discharged from the sewage chamber (110) before the first spraying.

4. The self-cleaning method according to claim 2, characterized in that: The determining of first information for characterizing the degree of turbidity of the wall of the sewage chamber (110) comprises: The first information is determined based on first dirtiness information of the wall of the sewage chamber (110) before the first spraying.

5. The self-cleaning method according to claim 1, characterized in that: The self-cleaning method further comprises the following steps: Second information for characterizing the degree of contamination of the cavity wall of the sewage cavity (110) is determined, and the spraying behavior of the second spraying is adjusted based on the second information.

6. The self-cleaning method according to claim 5, characterized in that: The determining of the second information used to characterize the degree of turbidity of the wall of the sewage chamber (110) comprises: The second information is determined based on second water quality information of sewage in the sewage chamber (110) and / or sewage discharged from the sewage chamber (110) collected after the first spraying and before the second spraying.

7. The self-cleaning method according to claim 5, characterized in that: The determining of the second information used to characterize the degree of turbidity of the wall of the sewage chamber (110) comprises: The second information is determined based on second dirtiness information of the wall of the sewage chamber (110) collected after the first spraying and before the second spraying.

8. The self-cleaning method according to claim 1, characterized in that: The self-cleaning method further comprises the following steps: Determining first information for characterizing the degree of contamination of the wall of the sewage chamber (110), and adjusting the spraying behavior of the first spraying and the spraying behavior of the second spraying based on the first information; If the first information satisfies a first preset condition, the spraying behavior of the first spraying is adjusted to a first spraying behavior, and the spraying behavior of the second spraying is adjusted to a second spraying behavior.

9. The self-cleaning method according to claim 8, characterized in that: The spraying behavior includes at least one of spraying pressure, water nozzle opening and spraying temperature, and adjusting the spraying behavior of the first spraying to the first spraying behavior and adjusting the spraying behavior of the second spraying to the second spraying behavior includes: The power of the water supply pump of the self-cleaning mechanism (140) is adjusted, and / or the opening size of the water spray port (142) of the self-cleaning mechanism (140) is adjusted.

10. A sewage tank (100), characterized in that: The sewage tank (100) comprises a sewage chamber (110), a self-cleaning mechanism (140) installed in the sewage chamber (110), and a clean water inlet (112); the self-cleaning mechanism (140) introduces clean water through the clean water inlet (112); the clean water inlet (112) is connected to an overflow port (410) of the clean water tank (400); and the sewage tank (100) is self-cleaned by the self-cleaning method according to any one of claims 1 to 9.

11. The sewage tank (100) according to claim 10, characterized in that: The bottom of the sewage tank (100) is provided with a sewage outlet (113), and the sewage outlet (113) is provided with a valve assembly (170). In response to the docking of the sewage tank (100) with the cleaning base station, the valve assembly (170) can open the sewage outlet (113).

12. The sewage tank (100) according to claim 11, characterized in that: The valve assembly (170) comprises a baffle (171) and a push rod (172); the baffle (171) is rotated to be connected to the cavity wall of the sewage cavity (110); and the push rod (172) is slidably disposed in the sewage cavity (110); In response to the docking of the sewage tank (100) with the cleaning base station, the push rod (172) slides under the drive of the push rod mechanism (310) on the cleaning base station, thereby pushing the baffle (171) to rotate to open the sewage outlet (113).

13. The sewage tank (100) according to claim 12, characterized in that: The valve assembly (170) further comprises an elastic reset member (173), wherein the elastic reset member (173) is mounted on the baffle plate (171) and / or the cavity wall of the sewage cavity (110), and in response to the separation of the sewage tank (100) from the cleaning base station, the elastic reset member (173) drives the baffle plate (171) to rotate in the opposite direction to close the sewage outlet (113).

14. The sewage tank (100) according to claim 10, characterized in that: The sewage tank (100) further comprises a tank cover (120) and a water inlet channel (130); the top of the sewage chamber (110) is provided with an opening (111), and the tank cover (120) is detachably covered on the opening (111); The water inlet channel (130) is arranged on the box cover (120) and has a water outlet (132) and a water inlet (131) that can be connected to a clean water supply pipeline; The self-cleaning mechanism (140) is arranged on the box cover (120) and is located inside the sewage chamber (110). The self-cleaning mechanism (140) comprises a water supply port (141) and a water spray port (142). The water supply port (141) is in communication with the water outlet (132). The reverse thrust generated when clean water is sprayed out from the water spray port (142) drives the self-cleaning mechanism (140) to rotate, so as to spray the clean water onto the cavity wall of the sewage cavity (110).

15. A cleaning device, comprising a sewage tank (100), characterized in that: The sewage tank (100) is self-cleaned by the self-cleaning method according to any one of claims 1 to 9.

16. A cleaning base station, comprising a sewage tank (100), characterized in that: The sewage tank (100) is self-cleaned by the self-cleaning method according to any one of claims 1 to 9.

Images