Patent Publication Number: US-2023148823-A1

Title: Liquid tank and base station

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present disclosure claims priority of Chinese Patent Application No. 202111369707.6, filed on Nov. 17, 2021, titled “integrated liquid tank and base station”, the contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of cleaning systems, and in particular, relates to a liquid tank and a base station. 
     BACKGROUND 
     A base station is generally equipped with two liquid storage tanks, one of the two liquid storage tanks is configured to store cleaning liquid, and another of the two liquid storage tanks is configured to store sewage. Because the base station is equipped with two liquid storage tanks, the base station occupies a large volume and the construction cost thereof is high. 
     Therefore, after creative efforts, the inventors of the present disclosure come up with an integrated liquid tank used in the base station. The integrated liquid tank is formed by nesting two liquid tanks. Because the material of the liquid tank nested inside is flexible and variable, when the liquid tank nested inside is full of water, the bottom wall thereof is easy to stick to the bottom wall of the external liquid tank, and thus it is not easy to separate the two liquid tanks. 
     SUMMARY 
     An embodiment of the present disclosure provides a liquid tank for a base station. The liquid tank includes a first liquid storage structure and a second liquid storage structure. The second liquid storage structure is positioned in the first liquid storage structure. The second liquid storage structure is flexible and variable in volume. A space is defined between a structural wall of the first liquid storage structure and a structural wall of the second liquid storage structure and is configured to store liquid. The first liquid storage structure includes an anti-sticking structure. The anti-sticking structure is positioned on a bottom surface of the first liquid storage structure facing the second liquid storage structure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to explain embodiments of the present disclosure or technical solutions in the prior art more clearly, attached drawings required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the attached drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained according to the structures shown in these attached drawings without creative labor. 
       Implementation of objectives, functional features and advantages of the present disclosure will be further described in combination with embodiments and with reference to attached drawings. 
         FIG.  1    is a schematic structural view of a liquid tank disassembled from a base station according to an embodiment of the present disclosure; 
         FIG.  2    is a schematic structural view of an embodiment of a first liquid storage structure; 
         FIG.  3    is a cross-sectional view of the first liquid storage structure; 
         FIG.  4    is a schematic structural view of another embodiment of the first liquid storage structure; 
         FIG.  5    is a partial schematic structural view of still another embodiment of the first liquid storage structure; 
         FIG.  6    is a schematic structural view of the first liquid storage structure from another perspective; 
         FIG.  7    is a schematic structural view of a box cover connected with a second liquid storage structure; 
         FIG.  8    is a cross-sectional view of the liquid tank; 
         FIG.  9    is a schematic structural view of the second liquid storage structure separated from the first liquid storage structure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, technical solutions in embodiments of the present disclosure will be described clearly and completely with reference to attached drawings in the embodiments of the present disclosure. Obviously, the embodiments described are only part but not all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the protective scope claimed in the present disclosure. 
     It shall be noted that, all directional indicators (such as up, down, left, right, front, back and so on) in the embodiment of the present disclosure are only used to explain relative position relationships and movement situations among components in a specific posture (as shown in the attached drawing). If the specific posture changes, the directional indicators will change accordingly. 
     In addition, in the present disclosure, descriptions such as “first”, “second” or the like are only used for descriptive purposes, and shall not be understood as indicating or implying the relative importance thereof or implicitly indicating the number of indicated technical features. Therefore, features defined with “first” and “second” may explicitly or implicitly include at least one of the features. In addition, technical solutions among the embodiments may be combined with each other on the basis that they can be realized by those of ordinary skill in the art. When the combination of the technical solutions is contradictory or impossible to be realized, it shall be considered that such combination of the technical solutions does not exist, and it is not within the protective scope claimed in the present disclosure. 
     Referring to  FIG.  1   ,  FIG.  2    and  FIG.  9   , an embodiment of the present disclosure provides a liquid tank  100 , which is applied to a base station  1 . The liquid tank  100  includes a first liquid storage structure  110  and a second liquid storage structure  120 . The second liquid storage structure  120  is embedded in the first liquid storage structure  110 , and the second liquid storage structure  120  is flexible and variable in volume. The space between the structural wall of the first liquid storage structure  110  and the structural wall of the second liquid storage structure  120  is configured to store liquid; and the bottom surface of the first liquid storage structure  110  facing the second liquid storage structure  120  is provided with an anti-sticking structure. 
     Since the second liquid storage structure  120  is embedded in the first liquid storage structure  110 , and the second liquid storage structure  120  is flexible and variable in volume, with the decrease of liquid in the second liquid storage structure  120 , the volume of the second liquid storage structure  120  decreases, and the storage space between the structural wall of the second liquid storage structure  120  and the structural wall of the first liquid storage structure  110  increases. On the contrary, with the increase of liquid in the second liquid storage structure  120 , the volume of the second liquid storage structure  120  increases, and the storage space between the structural wall of the second liquid storage structure  120  and the structural wall of the first liquid storage structure  110  decreases. Thus, by the alternating increase and decrease of the liquid in the two liquid storage structures, the liquid of the two liquid storage structures is stored in one box, thereby avoiding the technical solution in which two liquid storage tanks are required in the prior art, reducing the volume occupied by the liquid tanks, reducing the construction cost, and increasing the storage space. Secondly, the bottom surface of the first liquid storage structure  110  facing the second liquid storage structure  120  is provided with the anti-sticking structure. In this way, the structural wall of the second liquid storage structure  120  made of flexible material is prevented from sticking to the structural wall of the first liquid storage structure  110 , which is beneficial to liquid circulation and separation of the two liquid storage structures. 
     In this embodiment, the first liquid storage structure  110  is a sewage tank for storing sewage, the second liquid storage structure  120  is a cleaning liquid bag for storing cleaning solution, and the cleaning solution may be clean water or cleaning agent. The cleaning solution of the second liquid storage structure  120  is used for cleaning the mop of the cleaning robot, the cleaning solution becomes sewage after washing the mop, and the sewage is recycled into the first liquid storage structure  110  by a liquid pumping system. As the amount of cleaning solution in the second liquid storage structure  120 , i.e., the cleaning liquid bag, decreases, the amount of sewage in the first liquid storage structure  110 , i.e., the sewage tank, increases correspondingly. However, in general, the alternating changes of the two liquid amounts are all within the total volume of the first liquid storage structure  110 . Thus, as a whole, the use of cleaning solution and the recycle of sewage in the base station  1  are realized by using the occupied space of one liquid storage structure, thereby avoiding the technical solution in which two liquid storage tanks are required in the prior art, reducing the volume occupied by the liquid tanks, reducing the construction cost, and increasing the storage space. 
     It shall be noted that, the first liquid storage structure  110  may also be configured to store cleaning solution, and the second liquid storage structure  120  may be configured to recycle sewage. 
     In this embodiment, the first liquid storage structure  110  is a rigid shell and the second liquid storage structure  120  is a cleaning liquid bag. It should be noted that, in other embodiments, both the first liquid storage structure  110  and the second liquid storage structure  120  may be made of flexible materials, as long as it is ensured that the second liquid storage structure  120  is made of flexible material and embedded in the first liquid storage structure  110 . 
     In this embodiment, the first liquid storage structure  110  is a rigid shell, this can improve the reliability of the first liquid storage structure  110 . As compared to the first liquid storage structure  110  made of flexible material, it is convenient for users to clean the inner wall of the first liquid storage structure  110  that is a rigid shell. 
     Because the second liquid storage structure  120  is made of flexible material and embedded in the first liquid storage structure  110 , when the second liquid storage structure  120  is fully filled with liquid, the bottom wall of the second liquid storage structure  120  will easily stick to the inner wall of the first liquid storage structure  110  under the action of gravity. On one hand, it is not easy to separate the second liquid storage structure  120  from the first liquid storage structure  110  when it is required to separate the second liquid storage structure  120  from the first liquid storage structure  110 , and on the other hand, it is unfavorable for liquid circulation at the bottom wall of the first liquid storage structure  110 . 
     Therefore, in order to facilitate the circulation of liquid and facilitate the separation of the two liquid storage structures, in this embodiment, the bottom surface of the first liquid storage structure  110  facing the second liquid storage structure  120  is provided with an anti-sticking structure. 
     Furthermore, in this embodiment, the anti-sticking structure includes convex structures. 
     Of course, it shall be noted that, the anti-sticking structure may also be a net-shaped partition plate which is arranged at the bottom wall of the first liquid storage structure  110 , and the second liquid storage structure  120  is placed on the net-shaped partition plate. Because the partition plate is a net-shaped structure, the contact area between the net-shaped partition plate and the bottom wall of the second liquid storage structure  120  is reduced as compared to a flat planar structure, and gaps are formed between the hollowed-out parts of the net-shaped partition plate and the bottom wall of the second liquid storage structure  120 . Therefore, the net-shaped partition plate can achieve the effect of preventing the second liquid storage structure  120  made of flexible material from sticking to the bottom wall of the first liquid storage structure  110 . In some embodiments, when the sewage in the first liquid storage structure  110  needs to be dumped, the net-shaped partition plate may be lifted first to filter out the large-particle impurities. In this way, before dumping the sewage, the large-particle impurities are first dumped into the trash bin by using the net-shaped partition plate, and then the sewage is dumped into the sewer, thereby preventing the large-particle impurities mixed with the sewage from being poured into the sewer and blocking the sewer. 
     In this embodiment, the convex structures are convex ribs  111  that are formed on the bottom surface of the first liquid storage structure  110  and protrudes towards the bottom surface of the second liquid storage structure  120 . Of course, it should be understood that, part of the bottom wall of the first liquid storage structure  110  may be concave to correspondingly form the convex structures, and the convex structures are not necessarily the convex ribs  111 , but may also be spherical bump structures or cylindrical bump structures. The shapes of the convex structures may be various, which are not listed herein. 
     Referring to  FIG.  2    and  FIG.  4   , in this embodiment, the convex structures extend along the length direction of the first liquid storage structure  110 , the convex structures are arranged in a plurality of columns, and the convex structures of each column are arranged at intervals. As the convex structures in each column are arranged at intervals, a plurality of force bearing points may be formed to support the bottom wall of the second liquid storage structure  120  made of flexible material, and it is easier to support the second liquid storage structure  120 . In this way, more gaps are formed between the structural wall of the second liquid storage structure  120  and the structural wall of the first liquid storage structure  110 , and the anti-sticking effect is better. It shall be noted that, the number of columns and rows of the convex structures are set according to the area of the bottom wall of the first liquid storage structure  110 . 
     In this embodiment, the convex ribs  111  extend along the length direction of the first liquid storage structure  110 , the convex ribs  111  are arranged in a plurality of columns, and the convex ribs  111  of each column are arranged at intervals. 
     Of course, in other embodiments, the convex ribs  111  do not necessarily extend along the length direction of the first liquid storage structure  110 . The convex ribs  111  may be arc-shaped convex rib structures, circular convex rib structures, or even triangular structures enclosed by convex ribs. The shapes of the convex ribs are various, which are not exemplified herein one by one. 
     In this embodiment, the convex ribs extend along the length direction of the first liquid storage structure  110 , which is simple in process and can achieve a good anti-sticking effect. 
     It shall be noted that, the length direction of the first liquid storage structure  110  is the long side direction based on the bottom surface of the first liquid storage structure  110 . 
     Referring to  FIG.  4   , in this embodiment, each of the convex ribs  111  in each column is staggered with the convex rib  111  in the adjacent column. The staggered arrangement can disperse the force bearing points at the bottom wall of the second liquid storage structure  120  and prevent the convex ribs  111  from being arranged in an array. Otherwise, the bottom wall of the second liquid storage structure  120  sinks into the area formed between every two rows of convex ribs  111 , and then the bottom wall of the second liquid storage structure  120  sticks to the area formed between every two rows of convex ribs  111 , and thus the bottom wall of the second liquid storage structure  120  sticks to the bottom wall of the first liquid storage structure  110  in the form of an array. 
     In some embodiments, the convex ribs  111  of one of every two columns may extend between two convex ribs  111  of the other column, such that the second liquid storage structure  120  can be prevented from sinking between two convex ribs  111  of the column. 
     Referring to  FIG.  3   , further, the edge of each convex rib  111  is arc-shaped. In this way, the edge of each convex rib  111  can be prevented from being sharp and piercing the second liquid storage structure  120  made of flexible material. Specifically, two sides of the convex rib  111  are arc-shaped along the long side direction of the convex  111 , and another two sides of the convex rib  111  are rounded corners along the width direction of the convex rib  111 . 
     There are two embodiments for the arrangement of the convex ribs  111 . 
     First embodiment: as shown in  FIG.  2   , the long side direction of each convex rib  111  is parallel to the length direction of the first liquid storage structure  110 , and the convex ribs  111  in each row are arranged flush with each other. 
     Second embodiment: as shown in  FIG.  4   , the long side direction of each convex rib  111  is set at a certain angle with respect to the length direction of the first liquid storage structure  110 , and each of the convex ribs  111  in each column is staggered with the convex ribs  111  in the adjacent column. 
     In other embodiments, referring to  FIG.  5   , the middle part of the upper end of each convex rib  111  is concave. If the area of the upper end of the convex rib  111  is not large enough, when the second liquid storage structure  120  made of flexible material is fully filled with cleaning solution, the pressure of the upper end of each convex rib  111  on the second liquid storage structure  120  will be relatively large, and the second liquid storage structure  120  will be readily worn out after long-term use. If the area of the upper end of each convex rib  111  is large, when the second liquid storage structure  120  made of flexible material is fully filled with cleaning solution, it is easy for the second liquid storage structure  120  to stick to the upper end of each convex rib  111 . Therefore, the middle part of each convex rib  111  may be concave, and the edge of each convex rib  111  is arc-shaped. Because the middle part of the upper end is concave, when the second liquid storage structure  120  is fully filled with cleaning solution, the bottom wall of the second liquid storage structure  120  will sink into the concave part. However, as compared to a flat surface, the concave upper surface of the convex rib  111  tends to form a gap with the second liquid storage structure  120 , so it is not easy for the second liquid storage structure  120  to stick to the convex ribs  111 . Moreover, as compared to a flat surface, the concave upper surface has a wider contact area with the second liquid storage structure  120 , so the pressure on the second liquid storage structure  120  is not so great, and thus the second liquid storage structure  120  will not be worn out easily. 
     In this embodiment, the first liquid storage structure  110  is configured to store sewage, and the liquid tank  100  further includes a drainage pipe  114 . A drainage outlet  1122  is defined at the bottom wall of the first liquid storage structure  110 , and the drainage pipe  114  is connected with the drainage outlet  1122 . With the arrangement of the drainage pipe  114 , the user can directly aims the drainage pipe  114  at the sewer to drain the sewage without opening the cover of the first liquid storage structure  110  to dump the sewage, which is simple and convenient and improves the user experience. Furthermore, in this embodiment, the bottom wall of the first liquid storage structure  110  is provided with a convex structure, such that the problem that the second liquid storage structure  120  sticks to the bottom wall of the first liquid storage structure  110  to block the drainage outlet  1122  and thus the sewage in the first liquid storage structure  110  cannot be discharged can be prevented. 
     In some embodiments, referring to  FIG.  3   ,  FIG.  6   ,  FIG.  8    and  FIG.  9   , portion  1102  of the outer peripheral wall of the first liquid storage structure  110  is concave, such that the inner peripheral wall of the first liquid storage structure  110  is correspondingly convex to form a drainage part  112 , the side of the drainage part  112  facing the convex structure is a drainage surface  1121 , the drainage outlet  1122  is defined on the drainage surface  1121 , and the drainage pipe  114  is accommodated in the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110 . By accommodating the drainage pipe  114  in the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110 , the drainage pipe  114  is prevented from protruding from the outer peripheral wall of the first liquid storage structure  110 . In an embodiment, the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110  is arranged at the edge of the outer peripheral wall of the first liquid storage structure  110 . 
     It shall be noted that, when the drainage outlet  1122  is arranged at the drainage surface  1121 , it is also possible that the second liquid storage structure  120  made of flexible material sticks to the drainage surface  1121 . If the bottom wall of the first liquid storage structure  110  is not provided with the anti-sticking structure and the second liquid storage structure  120  sticks to both the drainage surface  1121  and the bottom wall of the first liquid storage structure  110 , the sewage cannot be discharged through the drainage outlet  1122 . Therefore, in this embodiment, the anti-sticking structure is positioned on the bottom wall of the first liquid storage structure  110 , such that the gaps between the bottom wall of the second liquid storage structure  120  and the bottom wall of the first liquid storage structure  110  are defined, the sewage can be discharged from the drainage outlet  1122  through the gaps even if the second liquid storage structure  120  sticks to the drainage surface  1121 . 
     In this embodiment, the central axis of the drainage outlet  1122  is parallel to a horizontal line, that is, the drainage outlet  1122  is arranged laterally and faces the convex ribs  111 . The convex ribs  111  are arranged adjacent to the drainage outlet  1122 , such that the bottom wall of the second liquid storage structure  120  can be better prevented from sticking to the bottom wall of the first liquid storage structure  110  at the drainage outlet  1122 , and the circulation of sewage can be better, which is more conducive to discharging the sewage from the drainage outlet  1122 . 
     In this embodiment, referring to  FIG.  3   , the bottom wall of the first liquid storage structure  110  includes a blank part  140 , a drainage part  112 , and an anti-sticking part  142 . The anti-sticking part  142  is provided with the convex structures, and the blank part  140  and the drainage part  112  are arranged side by side at the sides of the anti-sticking part  142 . The drainage part  112  protrudes from the bottom wall of the first liquid storage structure  110 , and the drainage outlet  1122  is arranged on the drainage part  112  and faces the convex ribs  111 . The anti-sticking part  142  is obliquely arranged from the edge of the blank part  140  to the drainage outlet  1122 , which is beneficial to the smooth discharge of sewage from the drainage outlet  1122 . The blank part  140  is obliquely arranged from the edge of the first liquid storage structure  110  to the anti-sticking part  142 , such that the drainage outlet  1122  is arranged at the lowest end of the first liquid storage structure  110 , which is beneficial to the discharge of sewage from the drainage outlet  1122 . 
     In some embodiments, the edge of the drainage part  112  is arc-shaped, thereby preventing the drainage part  112  from scratching the structural wall of the second liquid storage structure  120 . 
     Specifically, the diameter of the drainage outlet  1122  is set according to the actual drainage time, and in an embodiment the shape of the drainage outlet  1122  is a circular opening. Of course, in other embodiments the drainage outlet  1122  may also have other shapes, which are not exemplified herein one by one. 
     Referring to  FIG.  6   , in this embodiment, the first liquid storage structure  110  is a rigid shell, and the convex structures run through the bottom wall of the first liquid storage structure  110  to form reinforcing ribs  113 . The reinforcing ribs  113  can make the structural wall of the first liquid storage structure  110  firmer, and the reinforcing ribs  113  are integrally formed with the bottom wall of the first liquid storage structure  110  by the convex structures running through the bottom wall of the first liquid storage structure  110 , so the processing technology is simple. 
     In this embodiment, the material of the convex structures is not limited, and the convex structures may be made of flexible material or rigid material. When the first liquid storage structure  110  is made of rigid material, the convex structures are also made of rigid material, such that on one hand, the anti-sticking effect is higher, on the other hand, it is easy for processing in the process of integral molding. 
     Of course, it shall be noted that, the reinforcing ribs  113  are not necessarily to be integrally formed with the bottom wall of the first liquid storage structure  110  by the convex structures running through the bottom wall of the first liquid storage structure  110 , and the reinforcing ribs  113  may also be formed by combining reinforcing ribs  113  that are arranged vertically and horizontally. It shall be noted that, the edge of the bottom wall of the first liquid storage structure  110  may protrude outwards to form the reinforcing ribs  113 , such that when the first liquid storage structure  110  is fully filled with sewage, the bottom wall of the first liquid storage structure  110  can be prevented from being broken when it directly falls to the ground by accident. 
     Referring to  FIG.  8   , in this embodiment, the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110  is further provided with a drainage pipe fixing head  115 , the drainage pipe fixing head  115  may be a plug-in post, and the drainage pipe  114  is plugged into the plug-in post to fix the tail of the drainage pipe  114  at the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110 . 
     Of course, the drainage pipe fixing head  115  may also be an elastic clamp, which clamps the drainage pipe  114 . 
     Furthermore, the concave portion  1102  of the outer peripheral wall of the first liquid storage structure  110  is L-shaped, the concave portion  1102  along the height direction of the outer peripheral wall of the first liquid storage structure  110  is configured to fix the tail of the drainage pipe  114 , the concave portion  1102  along the length direction of the first liquid storage structure  110  is configured to connect the head of the drainage pipe  114 , and the head of the drainage pipe  114  is in communication with the drainage outlet  1122 . 
     Furthermore, a detachable end cap is connected to the tail of the drainage pipe  114 . 
     In this embodiment, the structure wall at the upper opening of the first liquid storage structure  110  is provided there on with an exhaust opening  117 , a cleaning liquid outlet  116  and a sewage inlet  118 . The cleaning liquid outlet  116  is in communication with the second liquid storage structure  120  through a cleaning liquid pipe  121 , and the base station  1  pumps out the cleaning solution in the second liquid storage structure  120  to clean the mop through a liquid pump. 
     Furthermore, the tail of the cleaning liquid pipe  121  is connected with a filter head. When the second liquid storage structure  120  contains cleaning solution, the cleaning solution may be primarily filtered through the filter head, e.g., to filter out small-particle impurities, such that the cleaning solution flowing out from the second liquid storage structure  120  can well clean the mop of the cleaning robot. 
     The exhaust opening  117  and the sewage inlet  118  are both in communication with the first liquid storage structure  110 , and the base station  1  pumps air out of the first liquid storage structure  110  through an air pump that is in communication with the exhaust opening  117 , such that negative pressure is formed in the first liquid storage structure  110 , and sewage can be pumped into the first liquid storage structure  110  through the sewage inlet  118 . 
     It shall be noted that, when the first liquid storage structure  110  is a rigid structure, the cleaning liquid outlet  116 , the sewage inlet  118  and the exhaust opening  117  are all rigid connecting components formed on the first liquid storage structure  110 . The cleaning liquid outlet  116 , the sewage inlet  118 , and the exhaust opening  117  are all convexly and integrally formed on the first liquid storage structure  110 , the three openings are integrated onto one liquid storage structure, and thus the structure is simple and compact. 
     Furthermore, referring to  FIG.  7   , the liquid tank  100  further includes a box cover  130  detachably connected to the first liquid storage structure  110 , the box cover  130  is provided thereon with a buckle  131 , the buckle  131  is provided thereon with a buckle hole  1312 , the outer peripheral wall of the first liquid storage structure  110  is provided thereon with a buckle protrusion  119 , and the box cover  130  is detachably connected to the first liquid storage structure  110  through the engagement of the buckle hole  1312  and the buckle protrusion  119 . In some embodiments, the upper end of the second liquid storage structure  120  is integrally connected with the box cover  130 , such that it is easy to lift the second liquid storage structure  120  from the first liquid storage structure  110  by lifting the box cover  130 , which facilitates the separation of the two liquid storage structures. 
     Another embodiment of the present disclosure further discloses a base station  1 , referring to  FIG.  1    to  FIG.  9   , the base station  1  includes the base station body  11  and the liquid tank  100  according to the above embodiments, and the liquid tank  100  is arranged in the base station body  11 . 
     Specifically, the base station body  11  is formed with a cavity configured to accommodate the liquid tank  100 . 
     In the base station  1  of this embodiment, the second liquid storage structure  120  of the liquid tank  100  is flexible and variable in volume, the liquid in the two liquid storage structures alternately increase and decrease, the liquid of the two liquid storage structures is stored in one box, whereby the base station  1  avoids the scheme in which two liquid storage tanks are required in the prior art, the volume occupied by the liquid tanks is reduced, the construction cost is decreased, and the storage space is increased. Secondly, the bottom surface of the first liquid storage structure  110  facing the second liquid storage structure  120  is provided with the anti-sticking structure. In this way, the structural wall of the second liquid storage structure  120  made of flexible material is prevented from sticking to the structural wall of the first liquid storage structure  110 , which is beneficial to liquid circulation and separation of the two liquid storage structures. 
     It shall be noted that, the base station of the present disclosure is used in combination with the cleaning robot. The cleaning robot is provided with a wiper. When the cleaning robot finishes mopping the floor, the cleaning robot runs into the base station which is provided with a cleaning position for accommodating the cleaning robot, and the base station is provided thereon with a cleaning tank for cleaning the cleaning robot. Generally, the cleaning robot is provided thereon with two rotatable plates on which mops are fixed. When the cleaning robot moves to the cleaning position of the base station, the rotatable plates rotate, such that the mops can be cleaned by the cleaning piece on the cleaning tank. Of course, the base station is further provided thereon with a liquid outlet, the liquid outlet is in communication with the first liquid storage structure or the second liquid storage structure, so as to ensure that cleaning solution is supplied to the mops for cleaning the mops. 
     Of course, the base station is further provided thereon with other components, such as a charging component, a drying component, a blowing component, a voice reminding component and so on. 
     What described above are only some embodiments of the present disclosure and are not intended to limit the protective scope claimed in the present disclosure. Any equivalent structures or modifications that are made according to the specification and the attached drawings of the present disclosure under the concept of the present disclosure, or any direct/indirect applications of the present disclosure in other related technical fields shall all be included within the protective scope claimed in the present disclosure.