CN113143121B - Water tank structure and sweeping robot - Google Patents

Abstract

The application provides a water tank structure and a sweeping robot, the water tank structure includes the following components: a water tank middle shell and a water tank bottom shell enclose a water storage cavity; a concave dust collecting port is formed in the middle of the water tank bottom shell, and the dust collecting port will store the storage cavity. The water cavity is divided into a first water cavity with a first water outlet and a second water cavity with a second water outlet, and an installation groove is formed between the two water cavities; the four-way connecting piece is arranged in the installation groove and has a first inlet and outlet. a water port, a first water outlet port, a second water inlet port and a second water outlet port; one end of the first water inlet pipe is connected with the first water inlet port, and the other end extends into the first water cavity; both ends of the first water outlet pipe are respectively connected with the first water outlet port and the first water outlet; one end of the second water inlet pipe is connected with the second water inlet port, and the other end extends into the second water cavity; the two ends of the second water outlet pipe are respectively connected with the second water outlet port And the second water outlet connection. The water tank structure provided by the present application can effectively solve the problem of uneven water output from the water tank of the sweeping robot.

Description

Water tank structure and sweeping robot

technical field

The present application belongs to the technical field of sweeping robots, and more specifically, relates to a water tank structure and a sweeping robot.

Background technique

Nowadays, with the improvement of living standards, more and more consumers choose to use machines to complete tedious housework. Among them, intelligent sweeping robots are favored by consumers. The common sweeping robots on the market that can realize the wet mopping function are usually equipped with a two-in-one water tank. In actual operation, water is usually added to the water tank first, and then the control system of the sweeping robot controls the internal water pump to pump water from the water tank, and then pump to the rag to wet the rag, thereby realizing the wet mopping function of the sweeping robot. However, such a two-in-one water tank has the problems of complex structure, complicated assembly process, high cost and poor wet mopping effect. For example, the assembly process of this type of water tank is complicated, and most of them require two dispensing processes; the water tank cannot be filled with water, and because the water storage cavity of the water tank is cut off by the dust collection port, it is easy to produce water on one side and no water after adding water. Problem: Since there is no connection between the two sides of the water storage cavity, there will be problems such as uneven water output such as unilateral water output; the inclined water tank will continue to leak water, wet the ground, and affect the use of users.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a water tank structure to solve the technical problem of uneven water output from the water tank of the cleaning robot in the prior art.

In order to achieve the above purpose, the technical solution adopted in this application is to provide a water tank structure for a sweeping robot, including:

The water tank shell includes a water tank middle shell and a water tank bottom shell, and the water tank middle shell and the water tank bottom shell are fitted up and down to form a water storage cavity; the water tank middle shell is provided with a water filling port communicating with the water storage cavity; A dust collection port is formed in the middle of the shell, which is concave toward the water storage cavity. an installation groove; a first water outlet is provided on the bottom surface of the cavity of the first water cavity, and a second water outlet is provided on the bottom surface of the cavity of the second water cavity;

an air pump, which is arranged on the middle shell of the water tank and is located on one side of the water storage cavity, and the air pump is communicated with the water storage cavity; and,

The water pipe assembly includes a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe and a four-way connecting piece; the four-way connecting piece is arranged in the installation groove and has a first water inlet port, a second water outlet A water outlet port, a second water inlet port and a second water outlet port; one end of the first water inlet pipe is connected to the first water inlet port, and the other end of the first water inlet pipe extends into the first water cavity; The ends are respectively connected with the first water outlet port and the first water outlet; one end of the second water inlet pipe is connected with the second water inlet port, and the other end of the second water inlet pipe extends into the second water cavity; both ends of the second water outlet pipe are respectively connected with the second water outlet port and the second water outlet.

Optionally, the installation groove is located in the middle of the water storage cavity, and the groove bottom surface of the installation groove is higher than the cavity bottom surfaces of the first water cavity and the second water cavity;

The four-way connector is located in the middle of the installation groove, the first water inlet port and the first water outlet port are both protruding towards the first water cavity, and the second water inlet port and the second water outlet port are both protruding towards the second water cavity.

Optionally, the first water inlet port is higher than the first water outlet port, and the second water inlet port is higher than the first water outlet port.

Optionally, one end of the first water inlet pipe away from the four-way connector is adjacent to the cavity bottom surface of the first water cavity, and has a gap with the cavity bottom surface of the first water cavity.

Optionally, the bottom surface of the first water cavity is inclined downward in the direction toward the dust collection port, and has a first lowest water level area adjacent to the dust collection port, and the end of the first water inlet pipe away from the four-way connecting piece is located at the end of the first water inlet pipe. The first minimum water level zone;

The bottom surface of the second water cavity is inclined downward in the direction toward the dust collection port, and has a second lowest water level area adjacent to the dust collection port. Area.

Optionally, a first water inlet gap is provided on the bottom surface of the cavity of the first water cavity corresponding to one end of the first water inlet pipe away from the four-way connector, and the bottom surface of the first water inlet gap is lower than that of the first water cavity. cavity bottom;

The bottom surface of the second water cavity is provided with a second water inlet notch at the position corresponding to the end of the second water inlet pipe away from the spool connector, and the bottom surface of the second water inlet notch is lower than the cavity bottom surface of the second water cavity.

Optionally, the distance between the first water outlet and the dust collection port is greater than the distance between the first water inlet gap and the dust collection port;

The distance between the second water outlet and the dust collection port is greater than the distance between the second water inlet gap and the dust collection port.

Optionally, on the bottom surface of the bottom shell of the water tank away from the middle shell of the water tank, a first flange is protruded at the hole edge of the first water outlet, and a second flange is protruded at the hole edge of the second water outlet. .

Optionally, an abutment piece abutting against the upper end of the spool connector is provided on the inner side of the middle shell of the water tank, and an abutment block abutting against the lower end of the spool connector is provided on the inner side of the bottom shell of the water tank, And an elastic seal is sandwiched between the lower end of the four-way connecting piece and the abutting block.

The present application proposes a cleaning robot, which includes the aforementioned water tank structure.

The beneficial effect of the water tank structure provided by the present application is that compared with the prior art, in the water tank structure of the present application, when the wet mopping function of the sweeping robot needs to be realized, water can be added to the water storage cavity through the water filling port first, And the water can enter the other water cavity from one water cavity through the communication of the first water inlet pipe, the four-way connector and the second water inlet pipe, so that the first water cavity and the second water cavity can be filled with water eventually; Then, the air pump starts to pressurize the first water chamber and the second water chamber, so that the air pressure in the two water chambers increases, the water in the first water chamber enters the four-way connector through the first water inlet pipe, and the second water The water in the cavity enters into the four-way connector through the second water inlet pipe. After the water is mixed in the inner cavity of the four-way connector, it evenly passes through the first water outlet pipe and the second water outlet pipe to reach the corresponding water outlet. . In this way, whether it is the first water outlet of the first water chamber or the second water outlet of the second water chamber, water can be discharged, and the technical purpose of uniform water discharge from the water outlet pipes on both sides and preventing water leakage when the water tank is placed obliquely can be achieved. In the technical solution of the present application, in addition to the above technical effects, there are also other effects. For example, compared with the existing water tank design, the water tank structure cancels the communication structure at the bottom and replaces it with communication at the top, which can save one dispensing. The technology has the advantages of simplifying the structure and assembly process, and realizing the simplification of product assembly and the maximization of cost-effectiveness.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a water tank structure provided by an embodiment of the present application;

FIG. 2 is an exploded view of a water tank structure provided by an embodiment of the present application

3 is a bottom view of a water tank middle shell of a water tank structure provided by an embodiment of the present application;

4 is a schematic structural diagram of the water tank structure provided by the embodiment of the present application with the water pipe assembly and the middle shell of the water tank removed;

Fig. 5 is the enlarged schematic diagram of A place in Fig. 4;

FIG. 6 is a top view of the water tank structure provided by the embodiment of the present application, after the water pipe assembly is assembled and the middle shell of the water tank is removed;

Fig. 7 is the enlarged schematic diagram at B in Fig. 6;

8 is a bottom view of a water tank structure provided by an embodiment of the present application;

FIG. 9 is an enlarged schematic view of C in FIG. 8 .

Description of reference numbers:

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should also be noted that the azimuth terms such as left, right, upper and lower in the embodiments of the present application are only relative concepts to each other or refer to the normal use state of the product, and should not be regarded as limiting. .

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.

It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated A device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

The embodiments of the present application provide a water tank structure.

Referring to FIGS. 1 to 5 , in one embodiment, the water tank structure includes a water tank housing, an air pump 300 and a water pipe assembly 400 . Specifically, the water tank shell includes a water tank middle shell 110 and a water tank bottom shell 120. The water tank middle shell 110 and the water tank bottom shell 120 are fitted up and down to form a water storage cavity 200; The water inlet 111 of the water tank bottom shell 120 is formed in the middle of the water tank bottom shell 120 with a concave dust collecting port 121 facing the water storage cavity 200. A long and narrow installation groove 230 is formed between the first water cavity 210 and the second water cavity 220; the first water cavity 210 is provided with a first water outlet 211 on the bottom surface, and the second water cavity 220 is provided with a second water outlet on the bottom surface of the cavity 221. The air pump 300 is arranged on the middle shell 110 of the water tank and is located on one side of the water storage cavity 200 , and the air pump 300 is communicated with the water storage cavity 200 . The water pipe assembly 400 includes a first water inlet pipe 410, a first water outlet pipe 420, a second water inlet pipe 430, a second water outlet pipe 440, and a four-way connector 450; the four-way connector 450 is arranged in the installation groove 230 and has a first The water inlet port 451, the first water outlet port 452, the second water inlet port 453 and the second water outlet port 454; one end of the first water inlet pipe 410 is connected to the first water inlet port 451, and the other end of the first water inlet pipe 410 extends into the In the first water chamber 210; the two ends of the first water outlet pipe 420 are respectively connected to the first water outlet port 452 and the first water outlet 211; one end of the second water inlet pipe 430 is connected to the second water inlet port 453, and the second water inlet pipe The other end of the 430 extends into the second water cavity 220 ; the two ends of the second water outlet pipe 440 are respectively connected to the second water outlet port 454 and the second water outlet 221 .

It should be noted here that the water tank structure is mainly used for sweeping robots, of course, other devices with suitable structures can also be applied to the technical solutions of the present application. Generally, in addition to the above components, the cleaning robot also includes a main control board (not shown), etc., and the air pump 300 and other components are electrically connected to the main control board to realize intelligent control. In actual use, a mop is provided on the ground where the cleaning robot is in contact with the ground, and a dust collection port 121 is provided in front of the mop, that is, in the middle of the bottom shell 120 of the water tank. The dust and debris on the ground can be collected by the cleaning robot When the wet mopping function is required, the air pump 300 pressurizes the water storage chamber 200 through the air pump connecting pipe 310 communicated with the water storage chamber 200, so that the water in the water storage chamber 200 is pressurized. After being squeezed, water can be discharged from the water outlet, and then the mop can be wetted to realize the wet mopping function after cleaning. Here, as shown in FIG. 1 , in order to save space and achieve better effects of adding water and extruding water, the water filling port 111 and the air pump 300 are preferably located on two sides of the middle shell 110 of the water tank that are far apart.

Based on this structural design, in this embodiment, when the wet mopping function of the sweeping robot needs to be realized, water can be added to the water storage cavity 200 through the water filling port 111 first, and the water can be connected through the first water inlet pipe 410 and the four-way connection. Through the communication between the component 450 and the second water inlet pipe 430, one water chamber enters another water chamber, so that the first water chamber 210 and the second water chamber 220 can be filled with water eventually; The water chamber 210 and the second water chamber 220 are pressurized, so that the air pressure in the two water chambers is increased. The water in the water enters the four-way connector 450 through the second water inlet pipe 430. After the water is mixed in the inner cavity of the four-way connector 450, it evenly passes through the first water outlet pipe 420 and the second water outlet pipe 440 to reach the corresponding water outlet. of the water outlet. In this way, whether it is the first water outlet 211 of the first water chamber 210 or the second water outlet 221 of the second water chamber 220, water can be discharged, and the water outlet pipes on both sides can be uniformly discharged and prevent water leakage when the water tank is placed at an angle. technical purpose. In the technical solution of the present application, in addition to the above technical effects, there are also other effects. For example, compared with the existing water tank design, the water tank structure cancels the communication structure at the bottom and replaces it with communication at the top, which can save one dispensing. The technology has the advantages of simplifying the structure and assembly process, and realizing the simplification of product assembly and the maximization of cost-effectiveness.

Referring to FIGS. 2 , 4 and 6 , in this embodiment, the installation groove 230 is located in the middle of the water storage cavity 200 , and the bottom surface of the installation groove 230 is higher than the cavities of the first water cavity 210 and the second water cavity 220 Bottom surface; the four-way connector 450 is located in the middle of the installation groove 230. Specifically, in order to achieve uniform water output as much as possible, the shape and volume of the first water cavity 210 and the second water cavity 220 are preferably the same, while the installation groove 230 and the four The arrangement of the connecting piece 450 in the middle of the water storage cavity 200 is beneficial to further improve the uniformity of the water outlet. Here, the first water inlet port 451 and the first water outlet port 452 are both protruding toward the first water cavity 210 , and the second water inlet port 453 and the second water outlet port 454 are both protruding toward the second water cavity 220 , so , which can make the pipeline design as simple as possible, which is beneficial to improve the water inlet and outlet effects. In addition, in order to prevent the water pipe from leaking at the interface, the first water inlet pipe 410 is connected with the first water inlet port 451 with an interference fit, and the first water outlet pipe 420 is connected with the first water outlet port 452 with an interference fit. Similarly, the second water inlet pipe is connected with an interference fit. 430 is connected with the second water inlet port 453 with interference fit, and the second water outlet pipe 440 is connected with the second water outlet port 454 with interference fit.

Referring to FIGS. 2 , 4 and 5 , in this embodiment, the first water inlet port 451 is higher than the first water outlet port 452 , and the second water inlet port 453 is higher than the first water outlet port 452 . It can be understood that this setting conforms to the law of natural flow of water, which is beneficial to improve the effect of water inlet and outlet.

Referring to FIG. 4 , in this embodiment, the end of the first water inlet pipe 410 away from the four-way connector 450 is adjacent to the cavity bottom surface of the first water cavity 210 and has a gap with the cavity bottom surface of the first water cavity 210 . Similarly, the second water inlet pipe 430 can also be provided in the same way. It can be understood that this setting enables both the first water inlet pipe 410 and the second water inlet pipe 430 to absorb water as much as possible, which is beneficial to improve the water utilization rate of the water tank, thereby enhancing the wet mopping effect of the sweeping robot.

Further, as shown in FIG. 6 and FIG. 7 , in this embodiment, a first water inlet is provided on the bottom surface of the first water chamber 210 at a position corresponding to one end of the first water inlet pipe 410 away from the four-way connector 450 . The bottom surface of the first water inlet gap 212 is lower than the cavity bottom surface of the first water cavity 210; similarly, the cavity bottom surface of the second water cavity 220 corresponds to the end of the second water inlet pipe 430 away from the four-way connector 450. The position is provided with a second water inlet gap (not marked), and the bottom surface of the second water inlet gap is lower than the cavity bottom surface of the second water cavity 220 . It can be understood that the arrangement of the first water inlet notch 212 and the second water inlet notch can make the port of the water inlet pipe as close to the bottom surface of the water cavity as possible, thereby improving the water utilization rate and enhancing the water inlet effect.

Referring to FIGS. 4 and 6 , in this embodiment, the bottom surface of the first water chamber 210 is inclined downward in the direction toward the dust collection port 121 , and has a first lowest water level area adjacent to the dust collection port 121 . , the end of the first water inlet pipe 410 away from the four-way connector 450 is located in the first lowest water level area. Similarly, the bottom surface of the second water cavity 220 is inclined downward in the direction toward the dust collection port 121, and has a second lowest water level area adjacent to the dust collection port 121, and the second water inlet pipe 430 is far away from the four-way connector. One end of 450 is located in the second lowest water level zone. In this way, both the first water inlet pipe 410 and the second water inlet pipe 430 can be installed close to the middle, so that the pipes are short, which is beneficial to save costs.

Please refer to FIG. 4 , FIG. 6 and FIG. 7 , in this embodiment, the distance between the first water outlet 211 and the dust collection port 121 is greater than the distance between the first water inlet notch 212 and the dust collection port 121 ; The distance between the water inlet 221 and the dust collection port 121 is greater than the distance between the second water inlet gap and the dust collection port 121 . It can be understood that when the water outlet is far away from the water inlet gap, it is beneficial to improve the water inlet and outlet effects.

Please refer to FIG. 8 and FIG. 9 , in this embodiment, on the bottom surface of the bottom shell 120 of the water tank facing away from the middle shell 110 of the water tank, a first flange 211 a is protruded from the hole edge of the first water outlet 211 . A second flange (not shown) protrudes from the hole edge of the two water outlets 221 . Here, due to the surface tension of water, if the corresponding flanges are not provided at the two water outlets, the water will easily spread to the bottom of the bottom shell 120 of the water tank after flowing out from the water outlets, thereby affecting the wetting effect of the mop. , and after the flange is set, the water is not easy to spread to the bottom, which is beneficial to improve the wet mopping effect.

Further, please refer to FIG. 3 to FIG. 6 , in this embodiment, the inner side of the water tank middle shell 110 is provided with an abutment piece 112 abutting against the upper end of the four-way connector 450 , and the inner side of the water tank bottom case 120 is provided with an abutting piece 112 . There is an abutment block (not shown) abutting against the lower end of the four-way connector 450, and an elastic seal (not shown) is sandwiched between the lower end of the four-way connector 450 and the abutment block, so that , the stable installation of the four-way connecting piece 450 in the water tank can be realized, and the lower end of the four-way connecting piece 450 can be prevented from leaking water.

The present application also proposes a cleaning robot, which includes a water tank structure. The specific structure of the water tank structure refers to the above-mentioned embodiments. Since the cleaning robot adopts all the technical solutions of all the above-mentioned embodiments, it also has the technology of the above-mentioned embodiments. All the beneficial effects brought by the scheme will not be repeated here.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. The utility model provides a water tank structure for robot of sweeping floor, its characterized in that includes:

the water tank shell comprises a water tank middle shell and a water tank bottom shell, and the water tank middle shell and the water tank bottom shell are matched and spliced up and down to form a water storage cavity; a water filling port communicated with the water storage cavity is formed in the middle shell of the water tank; a dust collecting opening which is concave towards the water storage cavity is formed in the middle of the water tank bottom shell, the water storage cavity is divided into a first water cavity and a second water cavity by the dust collecting opening, and a long and narrow mounting groove is formed between the first water cavity and the second water cavity; the cavity bottom surface of the first water cavity is provided with a first water outlet, and the cavity bottom surface of the second water cavity is provided with a second water outlet;

the air pump is arranged on the water tank middle shell and positioned on one side of the water storage cavity, and the air pump is communicated with the water storage cavity; and the number of the first and second groups,

the water pipe assembly comprises a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe and a four-way connecting piece; the four-way connecting piece is arranged in the mounting groove and is provided with a first water inlet port, a first water outlet port, a second water inlet port and a second water outlet port; one end of the first water inlet pipe is connected with the first water inlet port, and the other end of the first water inlet pipe extends into the first water cavity; two ends of the first water outlet pipe are respectively connected with the first water outlet port and the first water outlet; one end of the second water inlet pipe is connected with the second water inlet port, and the other end of the second water inlet pipe extends into the second water cavity; two ends of the second water outlet pipe are respectively connected with the second water outlet port and the second water outlet; the first water inlet pipe is connected with the first water inlet port in an interference fit mode, the first water outlet pipe is connected with the first water outlet port in an interference fit mode, the second water inlet pipe is connected with the second water inlet port in an interference fit mode, and the second water outlet pipe is connected with the second water outlet port in an interference fit mode.

2. The water tank structure as claimed in claim 1, wherein the mounting groove is positioned at the middle of the water storage chamber, and the bottom surface of the mounting groove is higher than the bottom surfaces of the first and second water chambers;

the four-way connecting piece is located in the middle of the mounting groove, the first water inlet port and the first water outlet port face towards the first water cavity in a protruding mode, and the second water inlet port and the second water outlet port face towards the second water cavity in a protruding mode.

3. The water tank structure as recited in claim 2 wherein the first water inlet port is higher than the first water outlet port and the second water inlet port is higher than the first water outlet port.

4. The water tank structure as claimed in claim 2, wherein an end of the first water inlet pipe remote from the four-way connection member is adjacent to the chamber bottom surface of the first water chamber with a gap therebetween.

5. The water tank structure as claimed in claim 4, wherein the bottom surface of the first water chamber is inclined downwardly in a direction toward the dust collecting port and has a first lowest water level region adjacent to the dust collecting port, and an end of the first water inlet pipe remote from the four-way connection member is located in the first lowest water level region;

the bottom surface of the second water cavity is inclined downwards in the direction facing the dust collecting opening and is provided with a second lowest water level area adjacent to the dust collecting opening, and one end, far away from the four-way connecting piece, of the second water inlet pipe is located in the second lowest water level area.

6. The water tank structure as claimed in claim 4, wherein a first water inlet notch is formed in the bottom surface of the first water chamber at a position corresponding to one end of the first water inlet pipe away from the four-way connection member, and the bottom surface of the first water inlet notch is lower than the bottom surface of the first water chamber;

the cavity bottom surface of the second water cavity corresponds to the position, away from one end of the four-way connecting piece, of the second water inlet pipe is provided with a second water inlet notch, and the bottom surface of the second water inlet notch is lower than the cavity bottom surface of the second water cavity.

7. The water tank structure as claimed in claim 6, wherein the first water outlet is spaced from the dust collecting port by a distance greater than a distance between the first water inlet notch and the dust collecting port;

the distance between the second water outlet and the dust collecting opening is larger than the distance between the second water inlet notch and the dust collecting opening.

8. The water tank structure as claimed in claim 1, wherein a first flange is protruded at an aperture edge of the first water outlet and a second flange is protruded at an aperture edge of the second water outlet on a bottom surface of the bottom case of the water tank facing away from the middle case of the water tank.

9. The water tank structure according to any one of claims 1 to 8, wherein an abutting piece abutting against the upper end of the four-way connecting piece is arranged on the inner side surface of the water tank middle shell, an abutting block abutting against the lower end of the four-way connecting piece is arranged on the inner side surface of the water tank bottom shell, and an elastic sealing piece is arranged between the lower end of the four-way connecting piece and the abutting block.

10. A sweeping robot comprising a tank construction according to any one of claims 1 to 9.

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