Automatic cleaning device for pool

Abstract

The utility model provides an automatic pool cleaning device which comprises a shell, and the shell is provided with a water suction opening and a first water drainage opening. The water pump is arranged in the shell; the garbage basket containing cabin is arranged in the shell and communicates with the water suction opening, and a containing cabin opening is formed in the preset surface of the garbage basket containing cabin; and the flow guide cover is arranged between the garbage basket containing cabin and the water pump, is opposite to an opening of the garbage basket containing cabin and is used for guiding water sucked into the shell to the water outlet, and a preset gap exists between the edge of the flow guide cover and the preset surface of the garbage basket containing cabin. And a gap is formed between the garbage basket containing cabin and the flow guide cover, so that the adsorption relation between the automatic pool cleaning device and the wall of the swimming pool can be kept under the conditions that the garbage basket is normal and the garbage basket is jammed, the overall underwater operation posture of the machine body is stable, the sewage suction effect is improved, the pool cleaning efficiency is improved, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of mechanical structures, and more particularly to an automatic cleaning device for a water tank. Background Technology

[0002] In leisure facilities and modern homes, automatic pool cleaning systems have become an indispensable part, maintaining the cleanliness and hygiene of pools efficiently and conveniently. Automatic pool cleaning systems typically include a trash can for collecting trash. Some existing machines lack this trash can, resulting in significant suction loss from the water pump and instability during operation. Other machines, while equipped with a trash can, often have it completely blocked from the flow guide. When the trash can becomes full and clogged, the water flow channel is completely blocked, causing a decrease in both suction and thrust from the water pump, further resulting in instability. Finally, the lack of proper adhesion between the automatic pool cleaning system and the pool wall directly affects the suction speed and effectiveness, leading to low cleaning efficiency. Utility Model Content

[0003] In view of the above problems, this application provides an automatic water tank cleaning device to improve the effect of sewage suction, thereby improving the cleaning efficiency of the water tank.

[0004] The automatic water tank cleaning device includes a housing having a water inlet and a first drain outlet; a water pump disposed within the housing; a garbage basket containing compartment disposed within the housing and communicating with the water inlet, the garbage basket containing compartment having a compartment opening at a predetermined surface; and a flow guide shroud disposed between the garbage basket containing compartment and the water pump and opposite to the garbage basket containing compartment opening, for guiding water drawn into the housing toward the drain outlet, wherein a predetermined gap exists between the edge of the flow guide shroud and the predetermined surface of the garbage basket containing compartment.

[0005] The automatic water tank cleaning device also includes a trash basket, which is capable of filtering water drawn in from the water inlet, wherein the trash basket container is capable of accommodating the trash basket.

[0006] The automatic water tank cleaning device also includes a bottom water inlet / outlet, which is located at a different position on the bottom of the housing, along with the water inlet.

[0007] The shell contains a common waterway, a primary waterway, and a secondary waterway. The common waterway includes the predetermined gap, the flow guide, and the drain hole. The primary waterway includes the intake port, the waste basket, and the receiving compartment opening. The secondary waterway includes at least the bottom inlet / outlet. The common waterway and the primary waterway can form a complete water flow path, and the common waterway and the secondary waterway can form another complete water flow path. If the flow rate of the primary waterway is greater than or equal to a first predetermined flow rate, then the flow rate of the secondary waterway is less than or equal to a second predetermined flow rate.

[0008] Wherein, the first predetermined flow rate is greater than the second predetermined flow rate.

[0009] If the actual flow rate of the primary waterway is less than the first predetermined flow rate, then the actual flow rate of the secondary waterway is greater than the second predetermined flow rate.

[0010] The predetermined gap is 1-5 mm.

[0011] The bottom inlet / outlet includes a bottom drain outlet.

[0012] The housing includes a front surface and a rear surface, and the bottom drain outlet is located on the bottom of the housing on the side corresponding to the rear surface.

[0013] The water inlet is located on the bottom of the housing, on the side corresponding to the front surface.

[0014] The device includes a second drain outlet at a predetermined location in the garbage basket compartment; and the automatic water cleaning device also includes a baffle plate covering the second drain outlet. During the process of the automatic water cleaning device leaving the water surface, the baffle plate can open, allowing water in the garbage basket compartment to flow out from the second drain outlet and be discharged from the housing through the bottom inlet / outlet.

[0015] According to the automatic pool cleaning device provided in this application, the trash basket receiving compartment can concentrate the suction power of the water pump onto the trash basket, while a gap is left between the trash basket receiving compartment and the guide cover. When the trash basket is not blocked, a complete water flow path is formed through the common water channel and the primary water channel, concentrating the suction power of the water pump onto the trash basket, thus providing both suction and thrust. When the trash basket is blocked, the water pump can draw water from the gap between the trash basket receiving compartment and the guide cover and spray it out, forming a complete water flow path through the common water channel and the secondary water channel. This ensures a certain thrust even when the suction power is reduced, ensuring the automatic pool cleaning device adheres to the bottom and side walls of the pool. In both cases, the entire unit can maintain a stable posture while operating underwater, improving the suction effect and thus increasing the pool cleaning efficiency, bringing a more convenient and efficient pool cleaning solution to more homes and professional venues.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to this application and should not be construed as limiting the scope of this application.

[0018] Figure 1 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 1 ;

[0019] Figure 2 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 2 ;

[0020] Figure 3 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 3 ;

[0021] Figure 4 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 4 ;

[0022] Figure 5 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 5 ;

[0023] Figure 6This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 6 ;

[0024] Figure 7 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 7 ;as well as

[0025] Figure 8 This is a schematic cross-sectional view of an automatic water tank cleaning device according to an embodiment of this application. Figure 8 ;

[0026] The markings in the image are as follows:

[0027] 100 - Automatic cleaning device for water tanks.

[0028] 110 - Shell, 111 - Front surface, 112 - Rear surface, 113 - Bottom, 114 - Upper part; 200 - Inlet, 210 - First outlet, 220 - Bottom inlet / outlet, 221 - Bottom outlet; 300 - Common waterway, 310 - Primary waterway, 320 - Secondary waterway.

[0029] 120-Water pump.

[0030] 130 - Garbage basket containment compartment; 131 - Containment compartment opening; 132 - Second drain outlet; 133 - Pre-defined gap between garbage basket containment compartment and deflector.

[0031] 140 - Garbage basket; 141 - Liquid outlet.

[0032] 150 - fairing.

[0033] 160 - Water baffle; 161 - Water baffle cover. Detailed Implementation

[0034] In the following description, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. As will be appreciated by those skilled in the art, the described embodiments can be modified in various ways without departing from the concept or scope of the present application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive. These embodiments are provided so that this application can be understood more thoroughly and that the scope of the present application can be fully conveyed to those skilled in the art. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present application.

[0035] The accompanying drawings illustrate various structural schematics according to embodiments of this application. These drawings are not to scale, and some details have been enlarged for clarity, while others may be omitted. The shapes of the various structures and devices shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design alternatives according to actual needs. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application.

[0036] This application provides an automatic pool cleaning device. The automatic pool cleaning device can be, for example, a pool cleaning robot, which is used to perform mobile cleaning within a pool-shaped structure, such as a swimming pool, a water storage tank, a spa pool, a water tank, or a water reservoir. Unless otherwise specified below, the description of a pool-shaped structure will use a swimming pool as an example, and the description of the automatic pool cleaning device will use a robot as an example.

[0037] The automatic pool cleaning device includes: a housing having a water inlet and a first drain outlet, wherein the first drain outlet is located at the upper part of the housing and the water inlet is located at the bottom of the housing; a water pump disposed within the housing; a trash basket containing chamber disposed within the housing and communicating with the water inlet, wherein a containing chamber opening is provided at a predetermined surface of the trash basket containing chamber; and a flow guide shroud disposed between the trash basket containing chamber and the water pump and opposite to the opening of the trash basket containing chamber, for guiding water sucked into the housing toward the drain outlet, wherein a predetermined gap exists between the edge of the flow guide shroud and the predetermined surface of the trash basket containing chamber. Whether the trash basket is clogged or unobstructed, a complete water flow path can be formed within the automatic pool cleaning device, ensuring adhesion between the automatic pool cleaning device and the pool wall, maintaining the stability of the entire machine during underwater operation, improving the suction effect, and thus increasing the pool cleaning efficiency.

[0038] The automatic water tank cleaning device of this application will be described in detail below with reference to the accompanying drawings.

[0039] Figures 1 to 8 This is a cross-sectional structural schematic diagram of an automatic water tank cleaning device according to an embodiment of this application. Figure 1 As shown, this application provides an automatic pool cleaning device 100. Specifically, the automatic pool cleaning device 100 includes: a housing 110, a water pump 120, a garbage basket holding compartment 130, a garbage basket 140, and a flow guide 150.

[0040] The housing 110 may be, for example, the outer shell of the robot, which provides support, fixation, protection, isolation, and aesthetics for the internal components of the robot. In one embodiment, the housing 110 may be made of one or more of plastics, high-molecular organic materials, and metals, giving it excellent resistance to pressure, bending, and torsion, providing support for the internal mechanical structure, circuit boards, and precision components, withstanding water pressure from all directions, and ensuring stable operation of the internal components under various working conditions.

[0041] Specifically, the housing 110 includes a front surface 111, a rear surface 112, a bottom 113, and an upper part 114. The housing is provided with a water inlet 200, a first drain outlet 210, and a bottom inlet / outlet 220.

[0042] The water intake 200 is located at the bottom of the housing 110, and is positioned on the side of the bottom of the housing corresponding to the front surface. For example, the water intake 200 can directly contact the pool water externally, and is connected to the trash basket inside the housing internally. The robot can suck water through the water intake, allowing its body to adhere to the bottom or side wall of the swimming pool, while simultaneously sucking dirt into the trash basket.

[0043] The first drain outlet 210 is located at the upper part of the housing 110 and is connected to the water pump 120 inside the housing. The water inside the housing is sprayed outward by the water pump, and the reaction force of the water provides suction for the robot to stick to the surface to be cleaned (such as the bottom or side wall of a swimming pool).

[0044] like Figure 2 As shown, the water pump 120 is housed within the casing 110. In one embodiment, the water pump 120 is controlled by a motor and can spray water outside the machine body through a first drain outlet. For example, it can spray water directly above the robot, using the reaction force of the water to provide pressure for the robot to adhere to the bottom or side wall of the pool. Alternatively, it can be configured to spray water obliquely upwards from the robot, in which case the reaction force generated by the water spray can be decomposed into forces in two directions: the pressure of the robot on the bottom or side wall of the pool, and the force in the direction of the robot's forward movement. The first drain outlet will be described below with reference to specific embodiments and accompanying drawings.

[0045] like Figure 3 As shown, a garbage basket receiving compartment 130 is disposed within the housing 110 and is capable of accommodating a garbage basket 140. The garbage basket receiving compartment is detachably connected to the housing, and a receiving compartment opening 131 is provided on a predetermined surface of the garbage basket receiving compartment.

[0046] The trash basket 140 is capable of filtering water drawn in from the suction port 200. When the water pump 120 is started, it can suck away the water in the trash basket's holding compartment, creating a negative pressure state inside the compartment. Under the pressure difference, the water-dust mixture in the pool flows through the suction port 200 into the trash basket 140 located within the holding compartment. After being filtered by the trash basket 140, the debris is trapped inside, and the water flows out through the holding compartment opening 131. The suction port will be described below with reference to specific embodiments and accompanying drawings.

[0047] like Figure 3 As shown, the flow guide 150 is disposed between the garbage basket receiving compartment 130 and the water pump 120, and is opposite to the opening 130 of the receiving compartment. A predetermined gap exists between the edge of the flow guide 150 and a predetermined surface of the garbage basket receiving compartment 130. The predetermined surface and predetermined gap will be described below with reference to specific embodiments and accompanying drawings.

[0048] In one embodiment, the flow deflector 150 may be made of a flexible waterproof material. The overall shape of the flow deflector is horn-shaped and streamlined, with a larger end near the receiving compartment opening 131 and a smaller end near the water pump 120. The flow deflector 150 is mainly used to transmit water flow to the water pump 120, which continuously draws in and discharges water to maintain adhesion between the robot and the pool wall. The water flow may enter the housing from various gaps / slits on the surface of the housing 110, or it may flow into the housing from openings such as the bottom inlet / outlet 220 and the bottom drain 221, or it may enter the garbage basket from the suction port 200, be filtered, and then flow into the flow deflector through the receiving compartment opening.

[0049] like Figure 3 As shown, the trash basket 140 is located within the trash basket receiving compartment 130. The trash basket can be, for example, designed to be open, for storing trash collected by the robot during pool cleaning. The trash basket 140 can filter the water-dust mixture entering it; debris can be temporarily stored in the trash basket 140, while the filtered water can be discharged through components such as the receiving compartment opening 131, the flow guide 150, the first drain outlet 210, and the second drain outlet 132, thereby achieving the filtration and cleaning of the pool water.

[0050] The shell 110 has a common waterway 300, a primary waterway 310 and a secondary waterway 320.

[0051] The common waterway refers to the necessary path through which water in the housing 110 is discharged from the first drain outlet 210. In other words, during pump operation, regardless of where water enters the housing 110 through an opening / gap, it must pass through this common waterway before being discharged from the housing 110 by the pump. In one embodiment, the common waterway includes: a predetermined gap 133 between the waste basket containing compartment and the deflector, the deflector 150, and the first drain outlet 210.

[0052] like Figure 4 As shown, the primary waterway includes: a water intake 200, a waste basket 140, and a receiving compartment opening 131. The primary waterway and the common waterway can form a complete water flow path (composed of...). Figure 4 (The blue line in the image represents...)

[0053] In one embodiment, the primary waterway refers to the path formed by water outside the housing 110 entering the housing through the intake 200 at the bottom of the housing, passing through the garbage basket 130 and the garbage basket 140, and then flowing from the accommodating chamber opening 131 to the common waterway. The primary waterway is the main channel (i.e., the main waterway) through which the robot cleans and filters the water in the pool. Therefore, by monitoring the flow rate of the primary waterway, it can be determined whether the main waterway is unobstructed, and thus whether the garbage basket is blocked. Preferably, when the garbage in the garbage basket reaches 85% of its capacity, the monitored flow rate of the primary waterway can be set as a first predetermined flow rate. When the robot performs cleaning operations, if the actual flow rate of the primary waterway is greater than or equal to the first predetermined flow rate, it indicates that the main waterway is unobstructed and the garbage basket still has storage space; if the actual flow rate of the primary waterway is less than the first predetermined flow rate, it means that the main waterway is blocked to a certain extent, and the garbage basket's storage space is about to be exhausted. The above description of the first predetermined flow rate is exemplary. Those skilled in the art can select the first predetermined flow rate and its monitoring method, as long as the technical principles of this application can be achieved.

[0054] like Figure 5 As shown, the secondary waterway includes at least a bottom inlet / outlet 220. The secondary waterway and the common waterway can form another complete water flow path (composed of...). Figure 5 (The pink line in the text indicates this).

[0055] In one embodiment, the secondary waterway refers to the path formed by water outside the housing 110 entering the housing through the inlet / outlet 220 at the bottom of the housing and flowing to the common waterway. The secondary waterway may also include paths formed by water outside the housing entering the housing through other gaps and openings on the housing surface and flowing to the common waterway. The secondary waterway serves as a supplementary channel for supplying water to the water pump, maintaining the pump's spray rate when the main waterway (i.e., the primary waterway) becomes blocked, thereby providing suction between the robot and the pool bottom and sidewalls.

[0056] By monitoring the flow rate of the secondary waterway, it can be determined whether the replenishment waterway is in use, and indirectly whether the main waterway is blocked. Preferably, when the garbage in the garbage basket reaches 15% of its capacity, the monitored flow rate of the secondary waterway can be set as a second predetermined flow rate. The above description of the second predetermined flow rate is exemplary, and those skilled in the art can select the second predetermined flow rate and its monitoring method, as long as the technical principles of this application are achieved. The first predetermined flow rate is greater than the second predetermined flow rate.

[0057] In one embodiment, when the robot has just begun cleaning, the trash basket has not yet collected any trash or contains very little trash. Water from the pool flows into the housing 110 through the suction port 200, passes through the trash basket 140 and the receiving compartment opening 131 (i.e., through the primary waterway), and then enters the common waterway. Under the action of the water pump 120, it is discharged from the first drain port 210. The robot simultaneously possesses the suction force between itself and the surface to be cleaned at the suction port 200 and the reaction thrust from the water sprayed from the first drain port, ensuring the stability of the robot's movement. In this scenario, the water flow from the primary waterway and the secondary waterway merge to form the water flow in the common waterway. At this time, the water flow in the common waterway mainly comes from the primary waterway, and the flow rate of the primary waterway is greater than or equal to a first predetermined flow rate. The secondary waterway has no water flow, almost no water flow, or only a small amount of water flow; in other words, the flow rate of the secondary waterway is less than or equal to a second predetermined flow rate.

[0058] In one embodiment, as the robot is about to complete its cleaning task, the trash basket becomes clogged due to accumulating sufficient trash. Water flowing into the housing 110 from the suction port 200 descends and needs to flow into the housing through the bottom inlet / outlet 220. It then enters the common waterway through the gap between the trash basket compartment and the guide shroud, and is discharged from the first outlet 210 by the water pump 120. Therefore, even when the suction at the suction port 200 decreases, the robot can utilize the reaction thrust from the water sprayed from the first outlet to provide adhesion to the pool bottom and walls, promoting stable robot movement. In other words, if the actual flow rate of the primary waterway is less than a first predetermined flow rate, the water in the common waterway needs to be drawn from the secondary waterway due to the reduced flow in the primary waterway. In this case, the actual flow rate of the secondary waterway is greater than a second predetermined flow rate.

[0059] like Figure 6 As shown, a container opening 131 is provided on a predetermined surface of the garbage basket container 130; a flow guide 150 is opposite to the container opening, and there is a certain gap between the edge of the flow guide 150 and the predetermined surface of the garbage basket container 130, namely a predetermined gap 133 between the garbage basket container 130 and the flow guide 150.

[0060] If the predetermined gap 133 is too large, the water flow in the primary waterway cannot be smoothly guided to the guide shroud 150; if the predetermined gap 133 is too small, when the primary waterway becomes blocked or the water flow in the primary waterway decreases, the flow of water from the secondary waterway drawn into the guide shroud 150 and flowing into the common waterway is insufficient to compensate for the reduced water flow in the primary waterway. Preferably, the predetermined gap 133 is set to 1-10 mm. The above description of the predetermined gap is exemplary, and those skilled in the art can select the size of the predetermined gap in conjunction with the overall structure of the robot, as long as the technical principles of this application are achieved.

[0061] The bottom inlet / outlet 220 is also located at the bottom of the housing 110. The water inlet 200 and the bottom inlet / outlet 220 are respectively located at different positions on the bottom of the housing 110. During the process of the robot entering the water (i.e., entering underwater) and exiting the water (i.e. leaving the water surface), or after entering and exiting the water, the water inside the housing 100 can quickly enter the housing 110 and exit the housing 110 through the bottom inlet / outlet 220.

[0062] In one embodiment, such as Figure 7As shown, the bottom water inlet / outlet 220 includes a bottom drain outlet 221. The bottom drain outlet 221 is located on the side of the bottom 113 of the housing 110 corresponding to the rear surface 112. When the user grabs the robot's head and lifts it out of the water (i.e., out of the water), the bottom drain outlet 221 is at the lowest point of the robot (i.e., the bottom drain outlet 221 is at the lowest position), so that the water in the housing 110 can be smoothly discharged downward and outward through the bottom drain outlet 221, reducing the amount of water remaining in the housing 110.

[0063] Preferably, the above-mentioned water intake 200, bottom water inlet / outlet 220, and bottom drain 221 can be arranged in an array of round holes or grid holes, which can expand the water inlet / outlet area while ensuring the stability and efficiency of water inlet / outlet.

[0064] like Figure 8 As shown, the robot is equipped with a second drain outlet 132, located at a predetermined position in the garbage basket holding compartment 130. The robot also includes a water baffle 160, the upper end of which is partially connected to the side wall of the garbage basket holding compartment 130. During operation of the water pump 120, the water baffle 160 is pressed tightly against the second drain outlet 132 by the suction force of the pump, thereby preventing water in the garbage basket holding compartment 130 from flowing out through the second drain outlet 132. When the water pump 120 stops operating, and during the process of the user grabbing the robot's head and lifting it out of the water, the water baffle 160 opens under the force of gravity, thereby discharging water from the second drain outlet 132 and then through the bottom inlet / outlet 220 (including the bottom drain outlet 221). Optionally, the water baffle 160 is made of a flexible, waterproof, lightweight material, including one or more of plastic, rubber, and foam. A water baffle cover 161 is provided on the second drain outlet 132 to support and fix the water baffle 160.

[0065] In the description of this specification, the reference to the term "an embodiment" means that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment of this application. Furthermore, the described specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments. Moreover, those skilled in the art can combine and integrate the features of the different embodiments described in this specification without contradiction.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0067] The above description is merely an exemplary embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope described in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic water tank cleaning device, comprising: The housing has a water inlet and a first drain outlet, wherein the first drain outlet is located at the upper part of the housing and the water inlet is located at the bottom of the housing; A water pump is installed inside the housing; A garbage basket receiving compartment is disposed within the housing and communicates with the water inlet; a receiving compartment opening is provided on a predetermined surface of the garbage basket receiving compartment; and A flow deflector, disposed between the garbage basket receiving compartment and the water pump and opposite to the opening of the receiving compartment, is used to guide water drawn into the housing toward the first drain outlet, wherein a predetermined gap exists between the edge of the flow deflector and the predetermined surface of the garbage basket receiving compartment.

2. The automatic water tank cleaning device according to claim 1, wherein, The automatic water tank cleaning device also includes: The trash can is capable of filtering the water drawn in from the inlet, wherein... The garbage basket compartment is capable of accommodating the garbage basket.

3. The automatic water tank cleaning device according to claim 2, wherein, The automatic water tank cleaning device further includes: a bottom water inlet / outlet, which is located at a different position on the bottom of the housing, along with the water suction port.

4. The automatic water tank cleaning device according to claim 3, wherein, The shell contains a common waterway, a primary waterway, and a secondary waterway, wherein, The public waterway includes: the predetermined gap, the flow guide, and the first drain outlet; The primary waterway includes: the water intake, the waste basket, and the container opening; and The secondary waterway includes at least: the bottom inlet and outlet, wherein... If the flow rate of the primary waterway is greater than or equal to the first predetermined flow rate, then the flow rate of the secondary waterway is less than or equal to the second predetermined flow rate.

5. The automatic water tank cleaning device according to claim 4, wherein, The first predetermined flow rate is greater than the second predetermined flow rate.

6. The automatic water tank cleaning device according to claim 4, wherein, If the actual flow rate of the primary waterway is less than the first predetermined flow rate, then the actual flow rate of the secondary waterway is greater than the second predetermined flow rate.

7. The automatic water tank cleaning device according to claim 1, wherein, The predetermined gap is 1-5 mm.

8. The automatic water tank cleaning device according to claim 3, wherein, The bottom inlet and outlet include the bottom drain outlet.

9. The automatic water tank cleaning device according to claim 8, wherein, The housing includes a front surface and a rear surface, and the bottom drain outlet is located on the bottom of the housing on the side corresponding to the rear surface.

10. The automatic water tank cleaning device according to claim 9, wherein, The water inlet is located on the bottom of the housing, on the side corresponding to the front surface.

11. The automatic water tank cleaning device according to claim 3, wherein, A second drain outlet is provided at a predetermined position in the garbage basket containing compartment, and the automatic water tank cleaning device also includes a water baffle plate, which covers the second drain outlet. During the process of the automatic water tank cleaning device leaving the water surface, the water baffle plate can be opened, and the water in the garbage basket containing compartment can flow out from the second drain outlet and be discharged from the housing through the bottom inlet / outlet.

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