CN219479977U

CN219479977U - Water tank and cleaning device

Info

Publication number: CN219479977U
Application number: CN202320220813.6U
Authority: CN
Inventors: 王兴明
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-08-08
Anticipated expiration: 2033-02-02

Abstract

The application discloses water tank and cleaning equipment belongs to clean technical field. The water tank includes: the water tank body, water tank apron and water level detection subassembly. The water level detection assembly includes: the touch switch and the elastic protection piece are used for wrapping the touch switch. After the sewage of the water tank body is higher than the designated water level, the elastic protection piece can be compressed by the sewage with the water level in the water tank body continuously rising, so that the compressed part in the elastic protection piece can apply a pressing force to the touch switch, and the touch switch can trigger an alarm signal. After the sewage in the water tank body is cleaned, the elastic protection piece is no longer contacted with the sewage. Therefore, the compressed part of the elastic protection piece can be restored to the initial state under the action of self-rebound force, so that the elastic protection piece is ensured not to apply pressing force to the touch switch. The elastic protection piece can protect the touch switch to ensure that the accuracy of the cleaning equipment for detecting the water level in the water tank through the water level detection component is higher.

Description

Water tank and cleaning device

Technical Field

The application relates to the technical field of cleaning, in particular to a water tank and cleaning equipment.

Background

With the continuous improvement of the requirements of people on the quality of life, the requirements on environmental sanitation are correspondingly higher and higher. However, the working pressure and the day-to-day increase of modern people, the need to release from heavy cleaning work is urgent, and many cleaning devices are emerging to replace the manual work.

A floor scrubber is an apparatus for cleaning floors, generally comprising: cleaning head, fan assembly, sewer pipe and sewage tank. The cleaning head sprays clean water, electrolytic water or detergent to the ground, negative pressure is generated by the fan assembly, and sewage is sucked into the sewage tank by the sewage pipe, so that the cleaning process is completed.

In order to timely clean sewage in the sewage tank, the cleaning equipment needs to detect the water level of the sewage in the sewage tank. However, the accuracy of detecting the water level of sewage in the sewage tank is low at present.

Disclosure of Invention

The embodiment of the application provides a water tank and cleaning equipment. The problem of prior art's the accuracy that detects the water level of sewage in the sewage case is lower can be solved, technical scheme is as follows:

in one aspect, there is provided a water tank comprising: the water tank comprises a water tank body, a water tank cover plate and a water level detection assembly;

one side of the water tank body is fixedly connected with the water tank cover plate;

the water level detection assembly is located in the water tank body, and fixes the water tank apron is close to one side of water tank body, the water level detection assembly includes: the touch switch and the elastic protection piece are used for wrapping the touch switch;

wherein, after the liquid in the water tank body is higher than a designated water level, the elastic protection member can be compressed to apply a pressing force to the touch switch; after the liquid in the tank body is cleaned and is below a designated water level, the compressed portion of the elastic protection member is restored to an initial state to stop applying a pressing force to the touch switch.

Optionally, the elastic protection piece has and holds the chamber, and with hold the opening of chamber intercommunication, the elastic protection piece passes through the opening knot is put on the water tank apron, just touch-control switch is located hold the intracavity.

Optionally, the inner wall of the accommodating cavity has a plane opposite to the opening, and the area of the plane is smaller than that of the opening.

Optionally, the area of the cross section of the accommodating cavity at each position is gradually reduced along the direction from the water tank cover plate to the water tank body, and each cross section is parallel to the surface where the opening is located.

Optionally, the touch switch includes: the switch body is fixed on the water tank cover plate, and the switch button is positioned on one side of the switch body away from the water tank cover plate;

the water level detection assembly further includes: and the convex structure is fixed on the plane and is arranged adjacent to the switch button, wherein after the sewage in the water tank body is higher than a designated water level, the convex structure applies a pressing force to the switch button.

Optionally, the front projection of the switch button on the switch body is located in the front projection of the protruding structure on the switch body.

Optionally, the protruding structure and the elastic protection piece are integrally formed.

Optionally, the water tank further includes: the water tank cover plate is fixed on the conductive structure on one side, deviating from the water tank body, of the water tank cover plate, and the conductive structure is electrically connected with the touch switch.

Optionally, the water tank cover plate has a threading hole, and the water tank further includes: and one end of the conductive wire is electrically connected with the touch switch, and the other end of the conductive wire is electrically connected with the conductive structure.

Optionally, the water tank is a sewage tank, and a water inlet is formed in one side of the water tank body, which is away from the water tank cover plate.

In another aspect, a cleaning apparatus is provided, comprising: the cleaning device comprises a cleaning head and a water tank connected with the cleaning head, wherein the water tank is the water tank.

The beneficial effects that technical scheme that this application embodiment provided include at least:

a water tank comprising: the water tank body, water tank apron and water level detection subassembly. The water level detection assembly may include: the touch switch and the elastic protection piece are used for wrapping the touch switch. After the sewage of the water tank body is higher than the designated water level, the elastic protection piece can be compressed by the sewage with the water level in the water tank body continuously rising, so that the compressed part in the elastic protection piece can apply a pressing force to the touch switch. Thus, the touch switch can trigger an alarm signal and send the alarm signal to the cleaning equipment, so that the cleaning equipment sends out prompt information after receiving the alarm signal, and the prompt signal is used for indicating that the current water tank is full of sewage to a user. Therefore, after the user views the prompt information sent by the cleaning equipment, the sewage in the water tank can be cleaned in time. After the sewage in the water tank body is cleaned, the elastic protection piece is no longer contacted with the sewage. Therefore, the compressed part of the elastic protection piece can be restored to the initial state under the action of self-rebound force, so that the elastic protection piece is ensured not to apply pressing force to the touch switch. Here, the water level detection subassembly can not occupy too much space in the water tank is originally internal, and then can be great, and the elasticity protection piece in the water level detection subassembly can protect touch switch to guarantee that the sewage that gets into in the water tank is originally internal can not corrode touch switch, make touch switch can be stable work, and then can guarantee that cleaning equipment detects the accuracy of the water level in the water tank higher through this water level detection subassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a water tank according to an embodiment of the present application;

fig. 2 is an exploded view of the water tank shown in fig. 1;

FIG. 3 is an exploded view of a water level detection assembly provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of an elastic protection member according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of an elastic protector provided in an embodiment of the present application mounted on a tank cover;

FIG. 6 is a schematic view of the structure of the elastic protector shown in FIG. 4 on the other side;

fig. 7 is a schematic structural diagram of a touch switch according to an embodiment of the present application;

fig. 8 is a schematic structural view of a water tank cover plate provided in an embodiment of the present application on the other side;

FIG. 9 is an exploded view of another water level detection assembly provided in an embodiment of the present application;

fig. 10 is a schematic structural view of a cleaning apparatus according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, the scheme of detecting the water level of sewage in the sewage tank by the cleaning equipment mainly adopts the following two detection schemes:

in the first detection scheme, a hollow floater can be placed in a sewage tank, and the floater can float on sewage when the sewage exists in the sewage tank. Thus, as the water level in the sewage tank increases, the float floating on the sewage also increases. When the floater reaches a certain height in the sewage tank, the water level alarm can be triggered.

In the second detection scheme, a pair of electrode probes can be arranged on one side, opposite to the water inlet, of the sewage tank, and a certain gap exists between two electrode probes in the pair of electrode probes. When the water level in the sewage tank is low, the two electrode probes cannot be conducted, so that the water level alarm cannot be triggered; when the water level in the sewage tank is higher, the two electrode probes can be conducted by sewage in the sewage tank, so that the water level alarm can be triggered.

However, with the first detection scheme described above, the float occupies a large space in the sewage tank, resulting in a small capacity of the sewage tank, and the float is extremely prone to being stuck by foreign matter in the sewage tank, resulting in the float no longer rising with a rise in the water level in the sewage tank. For this reason, the accuracy of the cleaning apparatus to detect the water level in the sewage tank through the float is low.

For the second detection scheme, pollutants in the sewage are easily attached to the electrode probes, so that the conductivity of the electrode probes is poor, and the two electrode probes may not be conducted by the sewage. For this reason, the accuracy of the cleaning apparatus to detect the water level in the sewage tank through the electrode probe is also low.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a water tank according to an embodiment of the present application, and fig. 2 is an exploded view of the water tank shown in fig. 1. The water tank 000 may include: the water tank body 100, the water tank cover 200, and the water level detection assembly 300.

One side of the tank body 100 in the tank 000 may be fixedly connected with the tank cover 200.

The water level detecting assembly 300 in the water tank 000 may be located inside the water tank body 100, and the water level detecting assembly 300 may be fixed to a side of the water tank cover 200 near the water tank body 100.

In the embodiment of the present application, the water tank 000 may be a sewage tank, and a side of the tank body 100 facing away from the tank cover 200 has the water inlet 101. Thus, the sewage can enter the tank body 100 from the water inlet 101, and the water level detecting assembly 300 in the tank 000 can detect the water level of the sewage entering from the water inlet 101. In other possible implementations, the tank 000 may also be a clean water tank, such that the water level detection assembly 300 in the tank 000 is capable of detecting the level of clean water therein. In order to facilitate explanation of the structure and principle of the water tank 000 in the present application, the following embodiments will be described by taking the water tank 000 as a sewage tank as an example.

Referring to fig. 3, fig. 3 is an exploded view of a water level detecting assembly according to an embodiment of the present application. The water level detection assembly 300 may include: the touch switch 301 and the elastic protection member 302 for wrapping the touch switch 301.

Here, the touch switch 301 and the elastic protection member 302 in the water level detection assembly 300 may be fixed on the side of the water tank cover 200 close to the water tank body 100, and the elastic protection member 302 may wrap the touch switch 301, so that the elastic protection member 302 may protect the touch switch 301, so as to ensure that sewage entering the water tank body 100 will not corrode the touch switch 301.

In the present embodiment, after the water tank 000 is integrated into the cleaning device, the touch switch 301 in the water tank 000 may be electrically connected with the control component in the cleaning device. Here, at the time of cleaning apparatus, the cleaning apparatus may control the formation of negative pressure in the tank body 100 in the tank 000 so that the tank body 100 may suck sewage into the tank body 100 from the water inlet 101. With the continuous operation of the cleaning apparatus, the sewage entering the tank body 100 from the water inlet 101 is increased. For this reason, the water level portion of the sewage in the tank body 100 is continuously raised.

In this case, the elastic protector 302 in the water level detecting assembly 300 can be compressed after the liquid (i.e., sewage) in the tank body 100 is higher than a designated water level. By way of example, the elastic protection member 302 can be compressed by the sewage whose water level in the tank body 100 is continuously raised, so that the compressed portion of the elastic protection member 302 can apply a pressing force to the touch switch 301 in the water level detecting assembly 300. In this way, the touch switch 301 may trigger an alarm signal and send the alarm signal to the cleaning apparatus, so that the cleaning apparatus sends a prompt message after receiving the alarm signal, where the prompt signal is used to indicate to the user that the current water tank 000 is full of sewage. Therefore, after the user views the prompt information sent by the cleaning device, the sewage in the water tank 000 can be cleaned in time.

After the liquid (i.e., the contaminated water) in the tank body 100 is cleaned and is below a designated water level, the elastic protection member 302 in the water level detecting assembly 300 is no longer in contact with the contaminated water. In this way, the compressed portion of the elastic protection member 302 may be restored to the initial state by the self-resilience force, so as to ensure that the elastic protection member 302 no longer applies the pressing force to the touch switch 301 of the water level detection assembly 300. In this way, the touch switch 301 may not send an alarm signal to the cleaning device, so as to ensure that the cleaning device will not send a prompt message.

It should be noted that, after the sewage in the tank body 100 is cleaned, the compressed portion of the elastic protection member 302 may not only return to the initial state under the action of the self-resilience force, but also return to the initial state under the action of the negative pressure when the negative pressure is formed in the tank body 100. For this reason, when the elastic protection member 302 is no longer in contact with the contaminated water in the tank body 100, the elastic protection member 302 can be quickly restored to the original state before being uncompressed.

To sum up, the water tank provided in the embodiment of the present application includes: the water tank body, water tank apron and water level detection subassembly. The water level detection assembly may include: the touch switch and the elastic protection piece are used for wrapping the touch switch. After the sewage of the water tank body is higher than the designated water level, the elastic protection piece can be compressed by the sewage with the water level in the water tank body continuously rising, so that the compressed part in the elastic protection piece can apply a pressing force to the touch switch. Thus, the touch switch can trigger an alarm signal and send the alarm signal to the cleaning equipment, so that the cleaning equipment sends out prompt information after receiving the alarm signal, and the prompt signal is used for indicating that the current water tank is full of sewage to a user. Therefore, after the user views the prompt information sent by the cleaning equipment, the sewage in the water tank can be cleaned in time. After the sewage in the water tank body is cleaned, the elastic protection piece is no longer contacted with the sewage. Therefore, the compressed part of the elastic protection piece can be restored to the initial state under the action of self-rebound force, so that the elastic protection piece is ensured not to apply pressing force to the touch switch. Here, the water level detection subassembly can not occupy too much space in the water tank is originally internal, and then can guarantee that the capacity of water tank is great, and the elasticity protection piece in the water level detection subassembly can protect touch switch to guarantee that the sewage that gets into in the water tank is originally internal can not corrode touch switch, make touch switch can be stable work, and then can guarantee that the cleaning equipment is higher through the accuracy of this water level detection subassembly water level in the detection water tank.

In the embodiment of the present application, please refer to fig. 4, fig. 4 is a schematic structural diagram of an elastic protection member provided in the embodiment of the present application. The elastic protector 302 in the water level detecting assembly 300 has: a housing chamber 302a, and an opening 302b communicating with the housing chamber 302 a.

As shown in fig. 5, fig. 5 is a sectional view of an elastic protection member provided in an embodiment of the present application mounted on a tank cover plate. The elastic protection member 302 of the water level detection assembly 300 may be fastened to the tank cover 200 of the water tank 000 through the opening 302b. And the touch switch 301 provided on the tank cover 200 may be located in the receiving cavity 302a of the elastic protection member 302. Thus, the elastic protection piece 302 can wrap the touch switch 301 into the accommodating cavity 302a, so that the elastic protection piece 302 can isolate the sewage in the water tank body 100 from the sewage, and the sewage cannot corrode the touch switch 301.

For example, the touch switch 301 in the water level detecting assembly 300 may be fixed to a side of the sump cover 200 near the sump body 100 by a fastener such as a screw or a bolt, and a portion of the elastic protection member 302 in the water level detecting assembly 300 at the position of the opening 302b may be fixedly connected to an edge portion of the side of the sump cover 200 near the sump body 100 by an annular adhesive layer. In this way, the elastic protection piece 302 can wrap the touch switch 301 in the accommodating cavity 302a, and the gap between the elastic protection piece 302 and the water tank cover plate 200 can be sealed through the annular adhesive layer, so that the effect of the elastic protection piece 302 on sealing and protecting the touch switch 301 can be further improved.

Alternatively, as shown in fig. 4, the inner wall of the accommodation chamber 302a in the elastic protection member 302 has a flat surface 302c provided opposite to the opening 302b. This plane 302c may intersect the plane of the opening 302b. In other possible implementations, this plane 302c may also be parallel to the plane of the opening 302b. The embodiments of the present application are not limited in this regard.

In this application, the area of the flat surface 302b in the inner wall of the accommodation chamber 302a may be smaller than the area of the opening 302b of the elastic protection member 302. In this case, the area of the side of the elastic protection member 302 facing away from the tank cover 200 is smaller, so that the elastic protection member 302 is very easy to be compressed under the action of the sewage with the water level in the tank body 100 being continuously raised, and the compressed part of the elastic protection member 302 can apply the pressing force to the touch switch 301 more easily, so that the sensitivity of the water level detection assembly 300 in water level alarm can be improved.

As an example, as shown in fig. 4 and 6, fig. 6 is a schematic view of the structure of the elastic protector shown in fig. 4 at the other side. The areas of the cross sections of the receiving chamber 302a of the elastic protector 302 at the respective positions may be gradually reduced in the direction from the tank cover 200 to the tank body 100, and these cross sections may be parallel to the plane of the opening 302b of the elastic protector 302. In this case, the elastic protection member 302 can be more easily compressed by the sewage whose water level is continuously raised in the tank body 100. In this way, the sensitivity of the water level detecting assembly 300 in performing a water level alarm can be further improved.

Optionally, referring to fig. 7, fig. 7 is a schematic structural diagram of a touch switch according to an embodiment of the present application. The touch switch 301 in the water level detection assembly 300 may include: a switch body 301a and a switch button 301b. Here, the switch body 301a of the touch switch 301 may be fixed to a side of the tank cover 200 near the tank body 100, and the switch button 301b of the touch switch 301 may be located at a side of the switch body 301a facing away from the tank cover 200.

As shown in fig. 4 and 5, the water level detection assembly 300 may further include: a boss structure 303 fixed to a flat surface 302c in the inner wall of the accommodation chamber 302 a. That is, the protrusion structure 303 may be provided on the inner wall of the receiving chamber 302a of the elastic protection member 302. The protrusion structure 303 in the water level detection assembly 300 may be disposed adjacent to the switch button 301b in the touch switch 301.

Wherein, after the sewage in the tank body 100 is higher than the designated water level, the protrusion structure 303 in the water level detection assembly 300 may apply a pressing force to the switch button 301b in the touch switch 301. Here, after the protrusion structure 303 in the water level detection assembly 300 applies a pressing force to the switch button 301b in the touch switch 301, the switch body 301a in the touch switch 301 may trigger an alarm signal.

In order to allow the protrusion 303 to stably apply a pressing force to the switch button 301b, the flat surface 302c of the inner wall of the housing chamber 302a may be disposed parallel to the surface of the switch body 301 a. Thus, after the sewage in the tank body 100 is higher than the designated water level, the elastic protector 301 in the water level detecting assembly 300 is compressed, the compressed elastic protector 301 can directly drive the protrusion structure 303 to apply a pressing force to the switch button 301b.

In the embodiment of the present application, the front projection of the switch button 301b in the touch switch 301 on the switch body 301a may be located on the front projection of the bump structure 303 in the detection assembly 300 on the switch body 301 a. Thus, after the sewage in the tank body 100 is higher than the designated water level, the compressed elastic protection member 301 in the water level detecting assembly 300 is compressed, and the compressed elastic protection member 301 can drive the protrusion structure 303 to apply the pressing force to the switch button 301b more stably.

Alternatively, the elastic protection member 301 and the protrusion structure 303 in the water level detecting assembly 300 may be integrally formed. For example, the material 301 of the elastic protection member and the material of the bump structure 303 may be: rubber or silica gel material with certain elasticity and weaker hardness. In this way, the elastic protection 301 and the bump structure 303 can be obtained simultaneously by one injection molding process.

In order to ensure that the pressing force is stopped from being applied to the switch button 301b in time by the protrusion 303 in the detection unit 300 after the sewage in the tank body 100 is below the designated water level, as shown in fig. 5. When the elastic protector 301 in the present application is not compressed, a certain gap may exist between the convex structure 303 provided on the inner wall of the accommodation chamber 302a of the elastic protector 302 and the switch button 301b.

Thus, when the contaminated water in the tank body 100 is higher than a designated water level, the compressed portion of the elastic protection member 301 may drive the protrusion 303 to move in a direction approaching the switch button 301b until the protrusion 303 contacts the switch button 301b, and the protrusion 303 may apply a pressing force to the switch button 301b. When the contaminated water in the tank body 100 is below a designated water level, the compressed portion of the elastic protection member 301 may be restored to an original state so that the protrusion 303 can move in a direction away from the switch button 301b, and after the protrusion 303 is separated from the switch button 301b, the protrusion 303 may stop applying a pressing force to the switch button 301b.

Alternatively, as shown in fig. 8, fig. 8 is a schematic structural diagram of a water tank cover plate provided in an embodiment of the present application on the other side. The water tank 000 may further include: and a conductive structure 400 fixed to a side of the tank cover 200 facing away from the tank body 100. The conductive structure 400 in the water tank 000 may be electrically connected with the touch switch 301 in the water level detection assembly 300. Here, the conductive structure 400 in the water tank 000 may also be electrically connected with a control component in the cleaning device after integrating the water tank 000 within the cleaning device.

By way of example, the conductive structure 400 in the water tank 000 may be an electrode pad, and after integrating the water tank 000 within the cleaning device, the conductive structure 400 may abut conductive pins in the cleaning device such that the conductive structure 400 may be electrically connected with control components in the cleaning device through the conductive pins.

In this case, after the elastic protection member 302 in the water level detection assembly 300 is compressed, so that the compressed portion of the elastic protection member 302 applies a pressing force to the touch switch 301, an alarm signal triggered by the touch switch 301 may be transmitted to a control assembly in the cleaning apparatus through the conductive structure 400 and the conductive pin, so that the control assembly in the cleaning apparatus may generate a prompt message.

Alternatively, as shown in fig. 9, fig. 9 is an exploded view of another water level detection assembly provided in an embodiment of the present application. The tank cover 200 in the tank 000 has a threading hole 201. The water tank 000 may further include: a conductive wire 500 at least partially within the threaded aperture 201. Wherein one end of the conductive wire 501 in the water tank 000 may be electrically connected with the touch switch 301 in the water level detection assembly 300, and the other end of the conductive wire 501 in the water tank 000 may be electrically connected with the conductive structure 400. For this reason, the touch switch 301 and the conductive structure 400 respectively provided at both sides of the tank cover 200 can be electrically connected together through the conductive wire 500 provided in the threading hole 201, and the conductive wire 201 located in the threading hole 201 can be protected by the tank cover 200, so that the sewage in the tank body 100 does not corrode the conductive wire 201 in the threading hole 201.

The embodiment of the application also provides another cleaning device. The cleaning device may be a floor washer or a sweeping robot, for example. Referring to fig. 10, fig. 10 is a schematic structural diagram of a cleaning apparatus according to an embodiment of the present application. The cleaning device may include: a cleaning head 001, and a water tank 000 connected to the cleaning head 001. The water tank is the water tank in the above embodiment, and for example, the water tank may be the water tank shown in fig. 1.

In this application, the cleaning apparatus may generally further comprise: a blower assembly and a sewer pipe. Wherein the sewer pipe may communicate with an inlet port of the tank body in the water tank 000. Here, the cleaning head can spray clean water, electrolytic water or detergent to the ground, and then the fan assembly generates negative pressure, and sewage can be sucked into the water tank by utilizing the sewage pipe, so that the cleaning process is completed.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the utility model, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the utility model.

Claims

1. A water tank, comprising: a tank body (100), a tank cover plate (200) and a water level detection assembly (300);

one side of the water tank body (100) is fixedly connected with the water tank cover plate (200);

the water level detection assembly (300) is located in the water tank body (100) and is fixed on one side of the water tank cover plate (200) close to the water tank body (100), and the water level detection assembly (300) comprises: a touch switch (301) and an elastic protection member (302) for wrapping the touch switch (301);

wherein, after the liquid in the water tank body (100) is higher than a designated water level, the elastic protection member (302) can be compressed to apply a pressing force to the touch switch (301); after the liquid in the tank body (100) is cleaned and is below a designated water level, the compressed portion of the elastic protection member (302) is restored to an initial state to stop applying a pressing force to the touch switch (301).

2. The water tank according to claim 1, characterized in that the elastic protection member (302) has a receiving cavity (302 a) and an opening (302 b) communicating with the receiving cavity (302 a), the elastic protection member (302) is fastened on the water tank cover plate (200) through the opening (302 b), and the touch switch (301) is located in the receiving cavity (302 a).

3. The tank according to claim 2, characterized in that the inner wall of the housing chamber (302 a) has a plane (302 c) arranged opposite to the opening (302 b), and the area of the plane (302 c) is smaller than the area of the opening (302 b).

4. A tank according to claim 3, characterized in that the area of the cross section of the housing chamber (302 a) at each position is gradually reduced in the direction from the tank cover (200) to the tank body (100), and each of the cross sections is parallel to the plane of the opening (302 b).

5. A tank according to claim 3, characterized in that the touch switch (301) comprises: a switch body (301 a) fixed on the water tank cover plate (200), and a switch button (301 b) positioned on one side of the switch body (301 a) away from the water tank cover plate (200);

the water level detection assembly (300) further comprises: and a protrusion structure (303) fixed on the plane (302 c), and the protrusion structure (303) is disposed adjacent to the switch button (301 b), wherein the protrusion structure (303) applies a pressing force to the switch button (301 b) after water in the tank body (100) is higher than a designated water level.

6. The water tank according to claim 5, characterized in that the front projection of the switch button (301 b) on the switch body (301 a) is located within the front projection of the protruding structure (303) on the switch body (301 a).

7. The tank according to claim 5, characterized in that said protruding structure (303) is of integral construction with said elastic protection (302).

8. The water tank according to any one of claims 1 to 7, characterized in that the water tank (000) further comprises: the water tank cover plate (200) is fixed on one side, away from the water tank body (100), of the conductive structure (400), and the conductive structure (400) is electrically connected with the touch switch (301).

9. The water tank according to claim 8, wherein the tank cover (200) has a threading hole (201), the water tank (000) further comprising: and one end of the conductive wire (500) is electrically connected with the touch switch (301), and the other end of the conductive wire (500) is electrically connected with the conductive structure (400).

10. The water tank according to any one of claims 1 to 7, characterized in that the water tank (000) is a sewage tank and that a side of the tank body (100) facing away from the tank cover plate (200) has a water inlet (101).

11. A cleaning apparatus, comprising: a cleaning head (001), and a water tank (000) connected to the cleaning head (001), the water tank (000) being the water tank according to any one of claims 1 to 10.