Water tank and cleaning equipment

Abstract

The utility model discloses a water tank and cleaning equipment. The water tank comprises a water tank body, a first partition piece and a liquid level sensor. A containing space formed by the water tank body is divided into a first cavity and a second cavity through the first partition piece, and the liquid level sensor is connected with the second cavity. A first through hole is formed in the bottom, close to the water tank body, of the first partition piece, and the first cavity communicates with the second cavity through the first through hole. The increase and decrease of the liquid in the water tank main body can influence the air volume in the second cavity, and then the liquid level sensor detects the liquid level of the liquid in the first cavity in real time by detecting the air volume in the second cavity in real time, so that the water tank can feed back the liquid level of the liquid in the water tank main body to a user in real time; a user can conveniently use liquid in the water tank main body for operation; meanwhile, a user can know the liquid level of the liquid in the water tank body in real time, liquid can be added to the water tank body in time, the operation performance of the water tank is guaranteed, and the use experience of the user on the water tank is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a water tank and cleaning equipment. Background Art

[0002] Existing cleaning products usually use Hall sensors, capacitive sensors or photoelectric sensors to detect high or low water levels in fresh water tanks. Water tanks in base stations also use flow meters to detect water levels. However, these detection methods are single and cannot tell the water level in the water tank in real time. They cannot intuitively provide feedback to users on how much water is in the water tank. Users can only know the water level in the water tank when the water level in the water tank is too low or there is no water, and the normal operation of the equipment cannot be maintained. This affects the user's operation. For example, when a user is mopping the floor with a cleaning machine, the user will not know until there is no water in the water tank. At this time, the user's mopping work has to be suspended, and the mopping work can only be continued after the water tank is refilled with water, which affects the user's mopping efficiency. Frequent stops due to lack of water can easily shorten the service life of the cleaning machine and reduce the user's experience of using the cleaning machine. Utility Model Content

[0003] The present application provides a water tank to solve the above technical problems. The water tank comprises:

[0004] The water tank body forms a containing space;

[0005] A first partition is disposed in the accommodating space to separate the water tank body into a first cavity and a second cavity;

[0006] a liquid level sensor connected to the second cavity;

[0007] The first partition comprises a first through hole, the first cavity and the second cavity are connected through the first through hole, and the liquid level sensor is used to detect the change of air pressure in the second cavity to obtain the change of liquid level of the liquid in the first cavity.

[0008] Wherein, one side of the water tank body has a first protrusion, and the second cavity is partially located in the first protrusion;

[0009] The water tank further includes a second partition, which is disposed in the second cavity and located in the first protrusion, and the second partition divides the second cavity into a first accommodating cavity and a second accommodating cavity;

[0010] The second partition has a second through hole, and the second through hole is arranged at an end of the second partition away from the bottom of the water tank body.

[0011] Wherein, the height of the second through hole in the first direction is higher than the highest liquid level height of the liquid in the first cavity in the first direction, wherein the first direction is the height direction of the water tank.

[0012] Wherein, a third through hole is formed on a side of the second accommodating cavity away from the second through hole;

[0013] The water tank further includes a valve disposed at the third through hole, and the liquid level sensor is connected to the second accommodating chamber via the valve.

[0014] Wherein, the water tank also includes a fixing seat, which is spaced apart from the water tank body, and the fixing seat includes a second protrusion, which is corresponding to the third through hole. When the water tank body and the fixing seat are spaced apart, the second protrusion is arranged in the third through hole.

[0015] Wherein, the liquid level sensor is arranged on the fixing seat, the water tank further comprises an air pipe, the second protrusion comprises a fourth through hole, the first end of the air pipe is connected to the fourth through hole, and the second end of the air pipe is connected to the liquid level sensor;

[0016] When the water tank body and the fixing seat are spaced apart, the third through hole is communicated with the fourth through hole, and the liquid level sensor is communicated with the second accommodating chamber.

[0017] Wherein, the water tank also includes a first sealing ring, which is arranged in the fourth through hole. When the first end of the air pipe is connected to the fourth through hole, the first sealing ring is located between the fourth through hole and the first end of the air pipe.

[0018] Wherein, the water tank further comprises a second sealing ring, which is arranged around the second protrusion. When the water tank body and the fixing seat are arranged at an interval, the second sealing ring is located between the third through hole and the second protrusion.

[0019] Wherein, the water tank further includes a display component, and the display component is connected to the liquid level sensor to display the liquid level in the first cavity.

[0020] In order to solve the above technical problems, the present application also provides a cleaning device, including a cleaning device and a water tank as described above, wherein the water tank is connected to the cleaning device to provide the cleaning device with liquid loaded in a water tank body.

[0021] Beneficial effects of the present application: Different from the prior art, the water tank of the present application includes a water tank, a first partition and a liquid level sensor. The first partition divides the accommodation space formed by the water tank body into a first cavity and a second cavity, and the liquid level sensor is connected to the second cavity. Among them, the first partition is provided with a first through hole near the bottom of the water tank body, and the first cavity and the second cavity are connected through the first through hole. The liquid level sensor is used to detect the air volume in the second cavity to obtain the liquid level of the liquid in the first cavity. The increase or decrease of the liquid in the water tank body will affect the air volume in the second cavity, and then the liquid level sensor detects the air volume in the second cavity in real time to achieve real-time detection of the liquid level in the first cavity, so that the water tank can feedback the liquid level in the water tank body to the user in real time, which is convenient for the user to operate with the liquid in the water tank body; at the same time, because the user can know the liquid level in the water tank body in real time, the liquid can be added to the water tank body in time, which ensures the operating performance of the water tank and improves the user's experience of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] in:

[0024] Figure 1 It is a structural schematic diagram of the first embodiment of the water tank of the present application;

[0025] Figure 2 yes Figure 1 Schematic diagram of the partial structure of the medium water tank;

[0026] Figure 3 It is a structural schematic diagram of the second embodiment of the water tank of the present application;

[0027] Figure 4 yes Figure 3 Schematic diagram of the partial structure of the grey water tank.

[0028] Figure numbers: water tank 1; water tank body 11; first cavity 111; second cavity 112; first accommodating cavity 1121; second accommodating cavity 1122; first protrusion 113; third through hole 1131; first partition 12; first through hole 121; liquid level sensor 13; second partition 14; second through hole 141; valve 15; fixing seat 16; second protrusion 161; fourth through hole 1611; air pipe 17; first sealing ring 18; second sealing ring 19; first direction X. DETAILED DESCRIPTION

[0029] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0030] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0031] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, and can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0033] See also Figure 1 , Figure 1 The water tank 1 provided in the embodiment of the present application comprises a water tank body 11, a first partition 12 and a liquid level sensor.

[0034] The water tank body 11 forms a containing space, and the first partition 12 is arranged in the containing space to separate the water tank body 11 into a first cavity 111 and a second cavity 112. Further, the first partition 12 includes a first through hole 121, and the first cavity 111 and the second cavity 112 are connected through the first through hole 121. The first through hole 121 can be arranged at the end of the first partition 12 close to the bottom of the water tank body 11, or the first through hole 121 is arranged on one end of the first partition 12 close to the bottom of the water tank body 11, and the specific setting position of the first through hole 121 is not limited in this application.

[0035] Specifically, the bottom of the first cavity 111 and the second cavity 112 are connected through the first through hole 121, and the pressure of the air above the liquid surface in the first cavity 111 on the liquid surface in the first cavity 111 is equal to the pressure of the air above the liquid surface in the second cavity 112 on the liquid surface in the second cavity 112, that is, the air pressure above the liquid surface in the first cavity 111 and the hydraulic pressure in the first cavity 111 reach a force balance with the air pressure above the liquid surface in the second cavity 112 and the hydraulic pressure in the second cavity 112 (it should be understood that at this time the liquid level in the first cavity 111 is not necessarily equal to the liquid level in the second cavity 112).

[0036] When the liquid in the first cavity 111 is consumed and the liquid level drops, the air pressure above the liquid level in the first cavity 111 becomes smaller, and then the force in the first cavity 111 is unbalanced with the force in the second cavity 112. The air above the liquid level in the second cavity 112 squeezes part of the liquid in the second cavity 112 into the first cavity 111 through the first through hole 121, and the liquid level in the second cavity 112 drops. The liquid level in the first cavity 111 rises slightly compared to the liquid level after being consumed (it should be understood that at this time, the liquid level in the first cavity 111 is lower than the liquid level of the liquid in the first cavity 111 when it is not consumed), until the force in the first cavity 111 and the force in the second cavity 112 are balanced again. Therefore, the embodiment of the present application can detect the air pressure above the liquid level in the second cavity 112 to infer the air pressure above the liquid level in the first cavity 111, and then obtain the liquid level in the first cavity 111 through the relationship between the air pressure and the liquid level.

[0037] The liquid level sensor is connected to the second cavity, and is used to detect the air pressure in the second cavity 112 to obtain the liquid level change of the liquid in the first cavity 111, such as the increase or decrease of the liquid level in the first cavity 111.

[0038] The liquid level sensor is a pressure sensor for measuring liquid level. In this embodiment, the liquid level sensor can be specifically a static pressure immersion liquid level transmitter (liquid level gauge), which is based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid, and uses an isolated diffused silicon sensitive element or a ceramic capacitor pressure sensitive sensor to convert the static pressure into an electrical signal, which is then converted into a standard electrical signal after temperature compensation and linear correction.

[0039] In this embodiment, the second cavity 112 is connected to the liquid level sensor, so when the liquid level in the first cavity 111 changes, the liquid level in the second cavity 112 will also change, and then the air pressure in the second cavity 112 will change. For example, when water is added to the first cavity 111, the liquid level in the first cavity 111 rises, and the liquid level in the second cavity 112 rises accordingly, compressing the air in the second cavity 112, and the air pressure in the second cavity 112 increases. Or, when the user uses the water tank 1 to operate, the liquid in the first cavity 111 is used, the liquid level in the first cavity 111 decreases, and the liquid level in the second cavity 112 decreases accordingly, the air in the second cavity 112 diffuses, and the air pressure in the second cavity 112 decreases.

[0040] Among them, since the liquid level sensor is connected to the second cavity 112, the liquid level sensor can directly detect the air pressure above the liquid surface in the second cavity 112. Furthermore, the liquid level sensor can obtain the liquid level change of the liquid in the first cavity 111 based on the detected air pressure above the liquid surface in the second cavity 112, based on the relationship between the air pressure above the liquid surface in the second cavity 112 and the air pressure above the liquid surface in the first cavity 111, and the relationship between the air pressure above the liquid surface in the first cavity 111 and the liquid level height in the first cavity 111.

[0041] The liquid level sensor detects the changes in the air pressure in the second cavity 112 in real time and accurately obtains the changes in the liquid level in the first cavity 111, so that the user can obtain the changes in the liquid level in the water tank 1 in real time and replenish the water tank 1 in time, thereby ensuring the efficiency of the user's operation of the water tank 1, further maintaining the working performance of the water tank 1, and improving the user's experience of using the water tank 1.

[0042] Optional, see Figure 1 and Figure 2 , Figure 2 yes Figure 1 A schematic diagram of a partial structure of a middle water tank. A first protrusion 113 is provided on one side of the water tank body 11 , and a second cavity 112 is partially located in the first protrusion 113 .

[0043] The water tank 1 further includes a second partition 14, which is disposed in the second cavity 112 and located in the first protrusion 113. The second partition 14 divides the second cavity 112 into a first accommodating cavity 1121 and a second accommodating cavity 1122. The second partition 14 has a second through hole 141, which is disposed at one end of the second partition 14 away from the bottom of the water tank body 11, and the first accommodating cavity 1121 is connected to the second accommodating cavity 1122 through the second through hole 141.

[0044] Furthermore, the height of the second through hole 141 in the first direction X is higher than the highest liquid level of the liquid in the first cavity 111 in the first direction X, wherein the first direction X is the height direction of the water tank 1 .

[0045] Specifically, the liquid level sensor is connected to the second accommodating chamber 1122, and the second partition 14 partitions the second cavity 112 into the first accommodating chamber 1121 and the second accommodating chamber 1122. The liquid in the first cavity 111 enters the first accommodating chamber 1121 through the first through hole 121. However, due to the presence of the second partition 14, the liquid in the first accommodating chamber 1121 will not enter the second accommodating chamber 1122, thereby preventing the liquid from entering the liquid level sensor. This ensures that the liquid level sensor can normally detect the air pressure in the second cavity 112, improves the accuracy of the liquid level sensor in detecting the air pressure in the second cavity 112, ensures the safety of the liquid level sensor, and improves the working efficiency of the water tank 1.

[0046] Furthermore, since the first accommodating chamber 1121 and the first cavity 111 are connected through the first through hole 121, that is, the maximum liquid level height in the first accommodating chamber 1121 will be equal to or less than the maximum liquid level height in the first cavity 111, when the liquid level in the first cavity 111 reaches the maximum liquid level again, the water tank 1 is full of liquid. At this time, the height of the second through hole 141 in the first direction X is higher than the maximum liquid level height of the liquid in the first cavity 111 in the first direction X, that is, the height of the second through hole 141 in the first direction X is higher than the maximum liquid level height of the liquid in the first accommodating chamber 1121 in the first direction X, ensuring that the liquid will not enter the second accommodating chamber 1122 through the second through hole 141, thereby damaging the working performance of the liquid level sensor, further ensuring the safety of the liquid level sensor and the accuracy of detection.

[0047] In one embodiment, the second through hole 141 may be disposed at an end portion of the second partition 14 close to the top of the water tank 1 .

[0048] Optionally, the second accommodating cavity 1122 has a third through hole 1131 on one side away from the second through hole 141. That is, the first protrusion 113 has a third through hole 1131 at the bottom in the first direction X, and the liquid level sensor is connected to the second accommodating cavity 1122 through the third through hole 1131.

[0049] Optionally, the water tank 1 further includes a valve 15 disposed at the third through hole 1131 , and the liquid level sensor is connected to the second accommodating chamber 1122 via the valve 15 .

[0050] Specifically, when the liquid level sensor is connected to the second accommodating chamber 1122 , the valve 15 is opened, and when the liquid level sensor is not connected to the second accommodating chamber 1122 , the valve 15 is closed. When the liquid level sensor is not connected to the second accommodating chamber 1122, if the valve 15 is not provided at the third through hole 1131, or the valve 15 is not closed, that is, the second chamber 112 is connected to the outside, and the user replenishes the liquid into the first chamber 111, the liquid level in the second chamber 112 also rises accordingly, but since the second chamber 112 is connected to the outside, the air in the second chamber 112 is not compressed, but escapes into the external environment through the third through hole 1131, and the air pressure in the second chamber 112 cannot be effectively changed; and when the liquid level sensor is connected to the second chamber 112, it can be obtained from the foregoing that the working environment of the liquid level sensor is: the air pressure above the liquid surface in the first chamber 111 and the hydraulic pressure in the first chamber 111 reach a force balance with the air pressure above the liquid surface in the second chamber 112 and the hydraulic pressure in the second chamber 112. At this time, since the air pressure in the second cavity 112 does not change accordingly, although the force in the first cavity 111 and the force in the second cavity 112 reach a balance again, a new relationship is formed between the air pressure and the liquid level in the first cavity 111, and the air pressure and the liquid level in the second cavity 112. The liquid level sensor cannot accurately obtain the liquid level change in the first cavity 111 in the new relationship from the old relationship formula, thereby reducing the detection accuracy of the liquid level sensor.

[0051] Furthermore, if the water tank 1 is filled with liquid and the second cavity 112 is connected to the outside, the air pressure in the second cavity 112 will inevitably decrease, and the liquid level sensor may not be able to detect it, further affecting the accuracy of the liquid level sensor detection.

[0052] Therefore, when the liquid level sensor is not connected to the second cavity 112, the valve 15 is in a closed state to prevent the air in the second cavity 112 from escaping into the external environment through the third through hole 1131, thereby ensuring that after the liquid level sensor is connected to the second cavity 112, the liquid level sensor can accurately detect the force exerted on the liquid level sensor by the air in the second cavity 112, thereby improving the accuracy of the liquid level sensor detection.

[0053] Optionally, see Figure 3 and Figure 4 , Figure 3 It is a structural schematic diagram of the second embodiment of the water tank of the present application. Figure 4 yes Figure 3 The water tank 1 also includes a fixing seat 16.

[0054] The fixing seat 16 is spaced apart from the water tank body 11 , and the fixing seat 16 includes a second protrusion 161 , which is correspondingly arranged to the third through hole 1131 . When the water tank body 11 and the fixing seat 16 are spaced apart from each other, the second protrusion 161 is arranged in the third through hole 1131 .

[0055] In one embodiment, the valve 15 may be a one-way valve, which is disposed at the third through hole 1131, which is equivalent to the valve 15 being closed. When the water tank body 11 and the fixing seat 16 are spaced apart, the second protrusion 161 is disposed in the third through hole 1131, the second protrusion 161 abuts against the one-way valve, and applies a force to the one-way valve pointing to the inside of the second accommodating chamber 1122, the one-way valve is lifted by the second protrusion 161, the surface of the one-way valve close to the second accommodating chamber 1122 protrudes from the surface of the third through hole 1131 close to the second accommodating chamber 1122, and the air inside the second cavity 112 can move to the fixing seat 16 through the third through hole 1131, which is equivalent to the valve 15 being opened.

[0056] In another embodiment, the valve 15 may further include a spring, which is arranged around the valve 15. When the water tank body 11 and the fixing seat 16 are spaced apart, the second protrusion 161 pushes up the valve 15, and at the same time extends or compresses the spring, and the valve 15 is opened. When the water tank body 11 and the fixing seat 16 are separated, the second protrusion 161 moves away from the valve 15, and the spring returns to its original shape, driving the valve 15 to close.

[0057] Further, the liquid level sensor 13 is disposed on the fixing seat 16, the water tank 1 further includes an air pipe 17, the second protrusion 161 includes a fourth through hole 1611, a first end of the air pipe 17 is connected to the fourth through hole 1611, and a second end of the air pipe 17 is connected to the liquid level sensor 13. When the water tank body 11 and the fixing seat 16 are spaced apart, the third through hole 1131 is communicated with the fourth through hole 1611, and the liquid level sensor 13 is communicated with the second accommodating chamber 1122.

[0058] As described above, when the water tank body 11 and the fixing seat 16 are spaced apart, the second protrusion 161 is disposed at the third through hole 1131, and the valve 15 is opened. The third through hole 1131 is connected to the fourth through hole 1611, so the air in the second cavity 112 can reach the liquid level sensor via the third through hole 1131-the fourth through hole 1611-the air pipe 17, and then the liquid level sensor 13 detects the air pressure in the second cavity 112.

[0059] Optionally, the water tank 1 also includes a first sealing ring 18, which is arranged in the fourth through hole 1611. When the first end of the air pipe 17 is connected to the fourth through hole 1611, the first sealing ring 18 is located between the fourth through hole 1611 and the first end of the air pipe 17 to prevent air from escaping through the connection between the first end of the air pipe 17 and the fourth through hole 1611, thereby affecting the detection result of the liquid level sensor 13, improving the sealing of the connection between the air pipe 17 and the fourth through hole 1611, and ensuring the detection accuracy of the liquid level sensor 13.

[0060] Optionally, the water tank 1 further comprises a second sealing ring 19, which is arranged around the second protrusion 161. When the water tank body 11 and the fixing seat 16 are arranged at intervals, the second sealing ring 19 is located between the third through hole 1131 and the second protrusion 161. That is, when the water tank body 11 and the fixing seat 16 are arranged at intervals, the second protrusion 161 is arranged in the third through hole 1131, and the second sealing ring 19 is arranged around the second protrusion 161, which can improve the sealing of the connection between the second protrusion 161 and the third through hole 1131, prevent the air in the second cavity 112 from escaping through the connection between the second protrusion 161 and the third through hole 1131, and ensure the accuracy of the liquid level sensor detection.

[0061] Optionally, the water tank 1 further includes a display component (not shown), which is connected to the liquid level sensor 13 to display the liquid level in the first cavity 111 .

[0062] In one embodiment, the display component can be a display screen, which is arranged on the surface of the water tank 1 and connected to the liquid level sensor 13 to display the liquid level in the first cavity 111 detected by the liquid level sensor 13. The user can intuitively obtain the liquid level in the first cavity 111 based on the display component, thereby improving the user's experience of using the water tank 1.

[0063] In summary, the water tank 1 provided in the embodiment of the present application includes a water tank body 11, a first partition 12, a liquid level sensor 13, a second partition 14, a valve 15, a fixing seat 16, an air pipe 17, a first sealing ring 18 and a second sealing ring 19, etc. The first partition 12 and the second partition 14 separate the accommodation space inside the water tank body 11, and the liquid level sensor 13 is connected to the second accommodation cavity 1122 separated by the water tank body 11 to detect the air pressure of the second cavity 112 in the water tank body 11 to obtain the liquid level in the first cavity 111 in the water tank body 11. The user can obtain the liquid level in the first cavity 111 in real time and replenish the first cavity 111 in time, thereby improving the user's work efficiency and ensuring the working performance of the water tank 1.

[0064] The valve 15 prevents the air in the second cavity 112 from escaping when the liquid level sensor is not connected to the second cavity 112; the first sealing ring 18 and the second sealing ring 19 improve the sealing of the connection between the components, preventing the air in the second cavity 112 from escaping through the connection, thereby improving the detection accuracy of the liquid level sensor 13 and improving the user experience of the water tank 1.

[0065] The present application also provides a cleaning device (not shown), including a cleaning device and a water tank 1, wherein the water tank 1 is connected to the cleaning device, and when the cleaning device is running, the water tank 1 provides the cleaning device with liquid in the water tank body 11.

[0066] At the same time, the liquid level sensor 13 detects the liquid level in the water tank body 11 in real time, and promptly reminds the user to replenish the water tank body 11 with liquid, thereby ensuring the operating efficiency of the cleaning device.

[0067] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A water tank, characterized in that: include: The water tank body forms a containing space; A first partition is disposed in the accommodating space to divide the water tank body into a first cavity and a second cavity; a liquid level sensor connected to the second cavity; The first partition comprises a first through hole, the first cavity and the second cavity are connected through the first through hole, and the liquid level sensor is used to detect the change of air pressure in the second cavity to obtain the change of liquid level of the liquid in the first cavity.

2. The water tank according to claim 1, characterized in that: One side of the water tank body has a first protrusion, and the second cavity is partially located in the first protrusion; The water tank further includes a second partition, which is disposed in the second cavity and located in the first protrusion, and the second partition divides the second cavity into a first accommodating cavity and a second accommodating cavity; The second partition has a second through hole, and the second through hole is arranged at an end of the second partition away from the bottom of the water tank body.

3. The water tank according to claim 2, characterized in that: The height of the second through hole in the first direction is higher than the highest liquid level of the liquid in the first cavity in the first direction, wherein the first direction is the height direction of the water tank.

4. The water tank according to claim 2, characterized in that: The second accommodating cavity has a third through hole on one side away from the second through hole; The water tank further includes a valve disposed at the third through hole, and the liquid level sensor is connected to the second accommodating chamber via the valve.

5. The water tank according to claim 4, characterized in that: The water tank also includes a fixing seat, which is spaced apart from the water tank body, and the fixing seat includes a second protrusion, which is correspondingly arranged in the third through hole. When the water tank body and the fixing seat are spaced apart, the second protrusion is arranged in the third through hole.

6. The water tank according to claim 5, characterized in that The liquid level sensor is arranged on the fixing seat, the water tank further comprises an air pipe, the second protrusion comprises a fourth through hole, the first end of the air pipe is connected to the fourth through hole, and the second end of the air pipe is connected to the liquid level sensor; When the water tank body and the fixing seat are spaced apart, the third through hole is communicated with the fourth through hole, and the liquid level sensor is communicated with the second accommodating chamber.

7. The water tank according to claim 6, characterized in that The water tank further includes a first sealing ring, which is disposed in the fourth through hole. When the first end of the air pipe is connected to the fourth through hole, the first sealing ring is located between the fourth through hole and the first end of the air pipe.

8. The water tank according to claim 5, characterized in that The water tank further comprises a second sealing ring, which is arranged around the second protrusion. When the water tank body and the fixing seat are arranged at an interval, the second sealing ring is located between the third through hole and the second protrusion.

9. The water tank according to claim 1, characterized in that: The water tank further comprises a display assembly, and the display assembly is connected to the liquid level sensor to display the liquid level in the first cavity.

10. A cleaning device, characterized in that: It comprises a cleaning device and a water tank as described in any one of claims 1 to 9, wherein the water tank is connected to the cleaning device to provide the cleaning device with liquid loaded in a water tank body.

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