Water tank and cleaning robot

Abstract

The utility model discloses a water tank and a cleaning robot, and relates to the technical field of cleaning equipment, the water tank comprises a tank body and a first dredging device, the tank body comprises a pollution discharge part, the pollution discharge part is provided with an overflowing hole, the first dredging device comprises a bearing part and a dredging part, the dredging part is arranged on the bearing part in a protruding mode, and the bearing part and the pollution discharge part are oppositely arranged; and the bearing part is slidably connected with the inner wall of the box body, so that the bearing part is switched between the first position and the second position. When the bearing part is located at the first position, an overflowing gap is formed between the dredging part and the overflowing hole, so that sewage can be normally discharged through the overflowing gap; when the bearing part is located at the second position, the dredging part is in contact with the hole wall of the overflowing hole, and sundries attached and accumulated at the overflowing hole can be scraped by controlling the bearing part to slide between the first position and the second position in a reciprocating manner, so that the overflowing hole can be prevented from being blocked by the sundries, and sewage can be normally discharged through the overflowing hole; and the probability that the cleaning robot breaks down due to blockage of the water tank can be reduced.

Description

Technical Field

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

[0002] In recent years, with the rapid development of the smart home industry, cleaning robots have become an important tool for household cleaning. The mainstream cleaning robots on the market usually have the functions of sweeping and mopping. There is a sewage tank inside the cleaning robot, which can discharge the internal sewage through the sewage outlet and sewage pipeline. In order to prevent large volumes of debris from entering the sewage pipeline, the sewage outlet is usually smaller in size to filter out the debris. Since there are more debris such as mud, sand, and hair in the sewage tank, the above debris is easy to adhere to the vicinity of the sewage outlet when the sewage tank is discharging sewage, causing the sewage outlet to be blocked and unable to discharge sewage normally, resulting in the cleaning robot being unable to be used normally. Utility Model Content

[0003] The present application discloses a water tank and a cleaning robot to solve the problem that the sewage outlet of the sewage tank involved in the related art is prone to clogging.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application discloses a water tank, the disclosed water tank comprising: a tank body and a first dredging device;

[0006] The box body includes a sewage discharge part, the sewage discharge part is provided with a flow hole, the first dredging device includes a bearing part and a dredging part, the dredging part is protrudingly arranged on the bearing part, the bearing part is arranged opposite to the sewage discharge part, and is slidably connected to the inner wall of the box body, so that the bearing part can be switched between a first position and a second position;

[0007] When the bearing portion is in the first position, a flow gap is provided between the dredging portion and the flow hole. When the bearing portion is in the second position, the dredging portion contacts the hole wall of the flow hole.

[0008] In a second aspect, an embodiment of the present application discloses a cleaning robot, which comprises a robot body and the above-mentioned water tank, wherein the water tank is arranged on the robot body.

[0009] The technical solution adopted in this application can achieve the following technical effects:

[0010] The water tank disclosed in the embodiment of the present application improves the related art. The disclosed water tank includes a box body and a first dredging device. The box body includes a sewage discharge part, and the sewage discharge part is provided with a flow hole. The first dredging device includes a bearing part and a dredging part. The dredging part is protrudingly arranged on the bearing part. The bearing part is arranged opposite to the sewage discharge part and is slidably connected with the inner wall of the box body so that the bearing part can switch between a first position and a second position. When the bearing part is in the first position, there is a flow gap between the dredging part and the flow hole, so that the sewage can be discharged normally through the flow gap; when the bearing part is in the second position, the dredging part contacts the hole wall of the flow hole. By controlling the bearing part to slide back and forth between the first position and the second position, the dredging part can scrape off the blockages attached and accumulated at the flow hole, thereby avoiding the blockage of the flow hole by debris, ensuring that the sewage can be discharged normally through the flow hole, and further reducing the probability of the cleaning robot causing a malfunction due to the blockage of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a water tank disclosed in an embodiment of the present application;

[0012] Figure 2 An exploded view of a water tank disclosed in an embodiment of the present application;

[0013] Figure 3 It is a structural schematic diagram of the first dredging device disclosed in an embodiment of the present application;

[0014] Figure 4 This is one of the exploded views of the first dredging device disclosed in the embodiment of the present application;

[0015] Figure 5 This is the second exploded view of the first dredging device disclosed in the embodiment of the present application;

[0016] Figure 6 This is one of the cross-sectional views of the carrying portion disclosed in the embodiment of the present application when it is in the first position;

[0017] Figure 7 The second cross-sectional view of the carrying portion disclosed in the embodiment of the present application when it is in the first position;

[0018] Figure 8 It is one of the cross-sectional views when the carrying portion disclosed in the embodiment of the present application is in the second position;

[0019] Fig. 9 The second cross-sectional view of the carrying portion disclosed in the embodiment of the present application when it is in the second position;

[0020] Fig.10 This is a schematic diagram of the structure of the second dredging device disclosed in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 110-box, 111-drainage part, 1111-flow hole, 1112-positioning hole, 1113-positioning groove, 1114-through hole, 120-first dredging device, 121-bearing part, 1211-positioning shaft, 1212-positioning rib, 1213-buckle, 1214-sleeve, 122-dredging part, 1221-cleaning column, 123-elastic part, 124-operating rod, 1241-first limiting part, 1242-second limiting part, 130-flow guide cover, 140-guide column, 150-second dredging device, 151-elastic cavity, 152-connecting pipeline, 160-drainage pipeline. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0025] Please refer to Figures 1 to 10 The embodiment of the present application discloses a water tank, which may include a box body 110 and a first dredging device 120. The box body 110 is used to collect sewage. The box body 110 includes a sewage discharge part 111, and the sewage discharge part 111 is provided with a flow hole 1111. When the sewage inside the box body 110 is stored to a certain amount, the sewage can be discharged to the outside of the box body 110 through the flow hole 1111 of the sewage discharge part 111 and the sewage discharge pipeline 160. The sewage discharge part 111 may be located at the bottom of the box body 110 or at the side of the box body 110. The sewage discharge part 111 and other areas of the box body 110 may be an integrated structure, which can improve the structural strength and consistency of the box body 110; the sewage discharge part 111 and other areas of the box body 110 may also be a split structure, and the sewage discharge part 111 and other areas of the box body 110 are made separately and then assembled together by bonding, welding, etc. In order to facilitate the gathering of sewage, the sewage discharge portion 111 may be located lower than other areas of the housing 110 .

[0026] The number of the flow holes 1111 on the sewage discharge part 111 can be one, two or more than two. During the sewage discharge process, the flow holes 1111 have a certain aperture, so as to prevent larger debris in the box body 110 from directly entering the sewage discharge pipeline 160 and causing blockage.

[0027] When the flow hole 1111 is unobstructed, sewage can be discharged smoothly through the flow hole 1111 and the sewage pipe 160. If the flow hole 1111 is blocked due to the attachment and accumulation of debris, it will affect the normal sewage discharge of the box 110. Based on the above situation, the first dredging device 120 can be used to dredge the flow hole 1111. Specifically, Figures 1 to 5 As shown, the first dredging device 120 may include a bearing portion 121 and a dredging portion 122. The bearing portion 121 is the structural basis of the first dredging device 120. The dredging portion 122 is protrudingly arranged on the bearing portion 121. The shape of the dredging portion 122 may be columnar, conical, hemispherical, etc. The dredging portion 122 and the bearing portion 121 may be an integrated structure, or they may be made separately and then assembled by welding, bonding, etc.

[0028] The bearing portion 121 is disposed opposite to the sewage discharge portion 111, and the bearing portion 121 is also slidably connected to the inner wall of the box body 110, such as Figures 6 to 9 As shown, the bearing portion 121 can switch between the first position and the second position by sliding, and a slide rail and a slider can be respectively provided on the bearing portion 121 and the inner wall of the box body 110, and the sliding connection is realized by the cooperation of the slide rail and the slider. Figure 6 and Figure 7 As shown, when the bearing portion 121 is in the first position, the bearing portion 121 is spaced a certain distance from the sewage discharge portion 111, so that there is a flow gap between the dredging portion 122 and the flow hole 1111, so that sewage can be discharged normally. Figure 8 and Fig. 9 As shown, when the bearing portion 121 slides to the second position, the bearing portion 121 and the sewage discharge portion 111 are relatively close to each other, driving the dredging portion 122 to contact the hole wall of the flow hole 1111, thereby being able to scrape the hole wall of the flow hole 1111.

[0029] The switching of the bearing part 121 between the first position and the second position can be manually operated by the user, and can also be controlled by a driving part such as a cylinder or a motor. As long as the bearing part 121 can be controlled to move back and forth and drive the dredging part 122 to scrape the flow hole 1111, the embodiment of the present application does not limit the driving method of the first dredging device 120.

[0030] From the above, it can be seen that the water tank disclosed in the embodiment of the present application improves the relevant technology. When the bearing part 121 is in the first position, there is a flow gap between the dredging part 122 and the flow hole 1111, so that the sewage can be discharged normally through the flow gap; when the bearing part 121 is in the second position, the dredging part 122 contacts the hole wall of the flow hole 1111, and by controlling the bearing part 121 to slide back and forth between the first position and the second position, the dredging part 122 can be used to scrape off the debris attached and accumulated at the flow hole 1111, thereby avoiding the clogging of the flow hole 1111 by the debris, ensuring that the sewage can be discharged normally through the flow hole 1111, and thus reducing the probability of the cleaning robot malfunctioning due to water tank clogging.

[0031] like Figures 6 to 9 As shown, in order to improve the efficiency of sewage discharge, the sewage discharge part 111 is provided with a plurality of flow holes 1111, and the plurality of flow holes 1111 are arranged at intervals from each other. The plurality of flow holes 1111 can be arranged in an array or in a Figure 7 and Fig. 9 The dredging portion 122 may include a plurality of cleaning columns 1221 , which are respectively connected to the bearing portion 121 , and the cleaning columns 1221 are arranged one by one with the flow holes 1111 .

[0032] The diameters of the cleaning column 1221 at various locations along its axial direction may be equal or unequal. For example, Figures 3 to 5 As shown, the diameter of the cleaning column 1221 away from the bearing portion 121 is smaller than the diameter of the cleaning column 1221 close to the bearing portion 121, and a transition slope is provided between the larger diameter portion and the smaller diameter portion of the cleaning column 1221 to play a guiding role.

[0033] like Figure 6 and Figure 7 As shown, when the bearing portion 121 is in the first position, there is a flow gap between the cleaning column 1221 and the flow hole 1111 to allow sewage to be discharged normally; Figure 8 and Fig. 9 As shown, when the carrying portion 121 slides to the second position, the cleaning column 1221 contacts the hole wall of the flow hole 1111 , thereby being able to scrape the flow hole 1111 .

[0034] like Figures 3 to 5 , Figure 7 , Fig. 9As shown, the sewage discharge part 111 is provided with a positioning hole 1112, and the bearing part 121 is provided with a positioning shaft 1211. The shape of the positioning hole 1112 can be square, rectangular, pentagonal, circular, etc. The shape of the cross section of the positioning shaft 1211 matches the shape of the positioning hole 1112. At least part of the positioning shaft 1211 can extend into the positioning hole 1112 and be slidably connected with the positioning hole 1112. By using the positioning and guiding functions of the positioning shaft 1211 and the positioning hole 1112, the stability of the bearing part 121 when sliding and switching between the first position and the second position can be improved.

[0035] like Figures 3 to 5 , Figure 7 , Fig. 9 As shown, the side of the positioning shaft 1211 may be provided with a protruding positioning rib 1212, the positioning rib 1212 may extend along the axial direction of the positioning shaft 1211, the hole wall of the positioning hole 1112 may be provided with a positioning groove 1113, at least part of the positioning rib 1212 extends into the positioning groove 1113, and is slidably connected with the positioning groove 1113. Similarly, the positioning groove 1113 may be provided on the side of the positioning shaft 1211, and the protruding positioning rib 1212 may be provided on the hole wall of the positioning hole 1112.

[0036] Based on the sliding cooperation between the positioning shaft 1211 and the positioning hole 1112 , and in combination with the positioning and guiding functions of the positioning rib 1212 and the positioning groove 1113 , the stability of the bearing portion 121 when slidingly switching between the first position and the second position can be further improved.

[0037] like Figures 3 to 9 As shown, the bearing portion 121 is provided with a buckle 1213 , and the buckle 1213 may have a certain elasticity. The buckle 1213 and the bearing portion 121 may be an integrated structure or a split structure. The sewage discharge portion 111 is provided with a through hole 1114 for the buckle 1213 to pass through, and a flow deflector 130 is provided on the side of the sewage discharge portion 111 facing away from the bearing portion 121, and the flow deflector 130 is connected to the edge of the sewage discharge portion 111. On the one hand, the flow deflector 130 can constrain the sewage discharge path so that the sewage can smoothly enter the sewage discharge pipe 160 below through the flow hole 1111 and the flow deflector 130. On the other hand, the flow deflector 130 can also be snap-fitted with the above-mentioned buckle 1213. Specifically, when the bearing portion 121 is in the first position, the buckle 1213 can be snap-fitted with the edge of the flow deflector 130 facing away from the sewage discharge portion 111, thereby limiting the bearing portion 121 from continuing to move upward, thereby preventing the bearing portion 121 and the cleaning column 1221 from escaping from the sewage discharge portion 111.

[0038] like Figures 3 to 9As shown, the first dredging device 120 may also include an elastic member 123, which may be a metal spring, a rubber spring or other member capable of storing elastic potential energy. The elastic member 123 is sleeved on the side of the positioning shaft 1211, and the two ends of the elastic member 123 are respectively connected to the bearing part 121 and the sewage discharge part 111, and elastically supported between the bearing part 121 and the sewage discharge part 111. The elastic member 123 is used to apply an elastic preload force to the bearing part 121 to slide toward the first position. Specifically, when the bearing part 121 is pressed downward, the elastic member 123 will be in a compressed state and accumulate elastic potential energy; when the pressing force is removed, the elastic member 123 releases the elastic potential energy and pushes the bearing part 121 to slide upward to the first position. Under the elastic force of the elastic member 123, the bearing part 121 can be stably in the first position, ensuring that there is a flow gap between the cleaning column 1221 and the flow hole 1111, so as to avoid affecting the normal sewage discharge process.

[0039] like Figures 1 to 4 As shown, the inner wall of the box body 110 is provided with a guide column 140, and the bearing part 121 is provided with a sleeve 1214, which is sleeved outside the guide column 140 and slidably connected with the guide column 140, so that the bearing part 121 can slide relative to the box body 110. By providing the guide column 140 and the sleeve 1214, the stability of the bearing part 121 when sliding can be improved.

[0040] In an optional embodiment of the present application, the driving force of the first dredging device 120 may come from the manual operation of the user, such as Figures 1 to 6 As shown, the first dredging device 120 may further include an operating rod 124, the positioning shaft 1211 is a hollow structure, at least part of the operating rod 124 extends into the positioning shaft 1211, and is engaged with the positioning shaft 1211, thereby realizing the assembly of the operating rod 124 and the bearing portion 121. The user can apply a pulling force or a pushing force to the bearing portion 121 through the operating rod 124, so that the bearing portion 121 slides and switches between the first position and the second position. In order to further improve the convenience of the user, a pull ring may be further provided at the upper end of the operating rod 124 to facilitate the user to hold it.

[0041] like Figures 3 to 6As shown, the side of the operating rod 124 is provided with a raised first limiting portion 1241, and the end of the operating rod 124 close to the bearing portion 121 is provided with a second limiting portion 1242. The operating rod 124 can rotate relative to the positioning shaft 1211 around the axial direction of the positioning shaft 1211. When the operating rod 124 and the positioning shaft 1211 are in the first relative position, the operating rod 124 can slide relative to the positioning shaft 1211 along the axial direction of the positioning shaft 1211. At this time, the operating rod 124 and the bearing portion 121 can be disassembled or reassembled. When the operating rod 124 and the positioning shaft 1211 rotate relative to each other to the second relative position, the first limiting portion 1241 and the second limiting portion 1242 are respectively engaged with the two ends of the positioning shaft 1211, so that the operating rod 124 and the bearing portion 121 are relatively fixed.

[0042] Both sides of the second limiting portion 1242 protrude from the positioning shaft 1211. When the bearing portion 121 is in the first position, the second limiting portion 1242 can abut against the side of the sewage discharge portion 111 that is away from the bearing portion 121, thereby limiting the bearing portion 121 from continuing to move upward and preventing the bearing portion 121 from escaping from the sewage discharge portion 111.

[0043] like Figure 2 and Fig.10 As shown, in order to further enrich the anti-blocking function of the water tank, the water tank can also include a second dredging device 150 and a sewage pipe 160. The sewage pipe 160 is connected to the sewage discharge part 111 and the second dredging device 150 respectively. The second dredging device 150 can purge the flow hole 1111 to impact the blockage at the flow hole 1111 to achieve a dredging effect. The second dredging device 150 can be a vacuum pump, a fan, or other device that can provide a purge power. In addition, a pump body is provided on the sewage pipe 160 to provide the power required for sewage discharge.

[0044] like Figure 2 and Fig.10 As shown, the second dredging device 150 may include an elastic cavity 151 and a connecting pipe 152. The elastic cavity 151 may be made of materials such as silicone and rubber. The elastic cavity 151 is connected to the sewage pipe 160 through the connecting pipe 152. The elastic cavity 151 may be deformed by squeezing it. After being squeezed, the fluid in the elastic cavity 151 will be transmitted to the sewage pipe 160 at a faster speed through the connecting pipe 152, and the flow hole 1111 will be purged to impact the blockage. After the elastic cavity 151 is released, the elastic cavity 151 will restore its initial shape. During the recovery process, the blockage that is impacted and falls off can be sucked into the elastic cavity 151 to achieve a dredging effect. The elastic cavity 151 can provide the power for purging to the flow hole 1111 through its own deformation.

[0045] Please refer to Figures 1 to 10An embodiment of the present application discloses a cleaning robot, which includes a robot body and the above-mentioned water tank, and the water tank is arranged on the robot body.

[0046] From the above, it can be seen that the water tank disclosed in the embodiment of the present application improves the relevant technology. When the bearing part 121 is in the first position, there is a flow gap between the dredging part 122 and the flow hole 1111, so that the sewage can be discharged normally through the flow gap; when the bearing part 121 is in the second position, the dredging part 122 contacts the hole wall of the flow hole 1111, and by controlling the bearing part 121 to slide back and forth between the first position and the second position, the dredging part 122 can be used to scrape off the debris attached and accumulated at the flow hole 1111, thereby avoiding the clogging of the flow hole 1111 by the debris, ensuring that the sewage can be discharged normally through the flow hole 1111, and thus reducing the probability of the cleaning robot malfunctioning due to water tank clogging.

[0047] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0048] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A water tank, characterized in that: include: A box body (110) and a first dredging device (120); The box body (110) comprises a sewage discharge portion (111), the sewage discharge portion (111) is provided with a flow hole (1111), the first dredging device (120) comprises a bearing portion (121) and a dredging portion (122), the dredging portion (122) is protrudingly arranged on the bearing portion (121), the bearing portion (121) is arranged opposite to the sewage discharge portion (111), and is slidably connected to the inner wall of the box body (110), so that the bearing portion (121) can switch between a first position and a second position; When the bearing portion (121) is in the first position, a flow gap exists between the dredging portion (122) and the flow hole (1111); when the bearing portion (121) is in the second position, the dredging portion (122) is in contact with the hole wall of the flow hole (1111).

2. The water tank according to claim 1, characterized in that: The sewage discharge portion (111) is provided with a plurality of the flow holes (1111), the dredging portion (122) comprises a plurality of cleaning columns (1221), the plurality of cleaning columns (1221) are respectively connected to the bearing portion (121), and the cleaning columns (1221) are arranged in a one-to-one correspondence with the flow holes (1111); When the bearing portion (121) is in the first position, there is the flow gap between the cleaning column (1221) and the flow hole (1111); when the bearing portion (121) is in the second position, the cleaning column (1221) is in contact with the hole wall of the flow hole (1111).

3. The water tank according to claim 2, characterized in that: The sewage discharge portion (111) is provided with a positioning hole, and the bearing portion (121) is provided with a positioning shaft (1211), and at least a portion of the positioning shaft (1211) extends into the positioning hole (1112) and is slidably connected to the positioning hole (1112).

4. The water tank according to claim 3, characterized in that One of the side surface of the positioning shaft (1211) and the hole wall of the positioning hole (1112) is provided with a protruding positioning rib (1212), and the other is provided with a positioning groove (1113), and at least part of the positioning rib (1212) extends into the positioning groove (1113) and is slidably connected to the positioning groove (1113).

5. The water tank according to claim 2, characterized in that: The bearing portion (121) is provided with a buckle (1213), the sewage discharge portion (111) is provided with a through hole (1114) for the buckle (1213) to pass through, and a flow guide cover (130) is provided on a side of the sewage discharge portion (111) facing away from the bearing portion (121), and the flow guide cover (130) is connected to an edge of the sewage discharge portion (111); When the bearing portion (121) is in the first position, the buckle (1213) is engaged with the edge of the air guide cover (130) that is away from the sewage discharge portion (111).

6. The water tank according to claim 3, characterized in that: The first dredging device (120) also includes an elastic member (123), which is sleeved on the positioning shaft (1211), and the two ends of the elastic member (123) are respectively connected to the bearing part (121) and the sewage discharge part (111), and the elastic member (123) is elastically supported between the bearing part (121) and the sewage discharge part (111), and is used to apply an elastic pre-tightening force to the bearing part (121) to slide toward the first position.

7. The water tank according to claim 1, characterized in that The inner wall of the box body (110) is provided with a guide column (140), and the bearing portion (121) is provided with a sleeve (1214). The sleeve (1214) is sleeved outside the guide column (140) and is slidably connected to the guide column (140).

8. The water tank according to claim 3, characterized in that: The first dredging device (120) further comprises an operating rod (124); the positioning shaft (1211) is a hollow structure; at least a portion of the operating rod (124) extends into the positioning shaft (1211) and is engaged with the positioning shaft (1211).

9. The water tank according to claim 8, characterized in that A protruding first limiting portion (1241) is provided on the side of the operating rod (124), and a second limiting portion (1242) is provided on the end of the operating rod (124) close to the bearing portion (121); The operating rod (124) can rotate relative to the positioning shaft (1211) around the axial direction of the positioning shaft (1211); when the operating rod (124) and the positioning shaft (1211) are in a first relative position, the operating rod (124) can slide relative to the positioning shaft (1211) along the axial direction of the positioning shaft (1211); when the operating rod (124) and the positioning shaft (1211) rotate relative to each other to a second relative position, the first limiting portion (1241) and the second limiting portion (1242) are respectively engaged with two ends of the positioning shaft (1211); When the bearing portion (121) is in the first position, the second limiting portion (1242) abuts against a side of the sewage discharge portion (111) that is away from the bearing portion (121).

10. The water tank according to claim 1, characterized in that The water tank further comprises a second dredging device (150) and a sewage discharge pipeline (160), wherein the sewage discharge pipeline (160) is respectively connected to the sewage discharge portion (111) and the second dredging device (150), and the second dredging device (150) is used to purge the flow hole (1111).

11. The water tank according to claim 10, characterized in that The second dredging device (150) comprises an elastic cavity (151) and a connecting pipe (152); the elastic cavity (151) is connected to the sewage pipe (160) via the connecting pipe (152); and the elastic cavity (151) provides a purging power to the flow hole (1111) through its own deformation.

12. A cleaning robot, characterized in that: It comprises a robot body and the water tank according to any one of claims 1 to 11, wherein the water tank is arranged on the robot body.

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