Patent Publication Number: US-11019976-B1

Title: Water tank structure and vacuum cleaner

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims priority to Chinese Patent Application 202011058746.X, filed on Sep. 30, 2020, which is incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of cleaning apparatuses and in particular to a water tank structure and a vacuum cleaner. 
     BACKGROUND 
     The water tank for storing dirty water and debris of the prior art cleaning apparatus has a complex internal structure and occupies a large internal storage space, and debris is prone to be tangled therewith and adhered thereto and is thus difficult to remove, resulting in germs breeding. In addition, air entering the water tank is prone to drive dirty water stored in the water tank to fluctuate, causing the dirty water to be sucked into a motor. In this situation, the motor can be damaged easily, and the dirty water can be carried by the air and blown out of the cleaning apparatus to contaminate the environment again, leading to a low utilization rate of storage space in the water tank. 
     SUMMARY 
     The objective of embodiments of the present disclosure is to solve the following technical problems: removing debris from the complex internal structure of the prior art water tank is difficult, the utilization rate of storage space in the water tank is low, and dirty water can be easily carried by air to flow out of the water tank. 
     In order to solve the aforementioned technical problems, an embodiment of the present disclosure provides a water tank structure using the following technical solution: 
     the water tank structure comprises a tank body and a tank cover assembly; 
     the tank body defines an accommodation cavity, and a first end of the tank body defines an opening in communication with the accommodation cavity; 
     the tank cover assembly comprises a cover body and a flow divider, and the cover body is disposed at the first end of the tank body proximate to the opening; the flow divider is in communication with the cover body and the accommodation cavity; 
     the flow divider is configured to divide a fluid flowing therethrough into a plurality of fluid streams formed into pairs, and each of the pairs of fluid streams has paired opposing flow directions. 
     In order to solve the aforementioned technical problems, an embodiment of the present disclosure further provides a water tank structure using the following technical solution: 
     the water tank structure comprises a tank body and a tank cover assembly; 
     the tank body defines an accommodation cavity, and a first end of the tank body defines an opening in communication with the accommodation cavity; 
     the tank cover assembly comprises a cover body and a flow divider, and the cover body is disposed at the first end of the tank body proximate to the opening; the flow divider is in communication with the cover body and the accommodation cavity; 
     the flow divider is configured to divide a fluid flowing therethrough into a plurality of fluid streams formed into pairs, and each of the pairs of fluid streams has paired kinetic energies and paired opposing flow directions such that the kinetic energies of the pairs of fluid streams cancel out. 
     As a further improvement to the aforementioned technical solution, each of the pairs of fluid streams has equal kinetic energies so as to increase an available space of the water tank structure. 
     As a further improvement to the aforementioned technical solution, a ratio of a maximum kinetic energy to a minimum kinetic energy carried by any one of the pairs of fluid streams is greater than 0.9. 
     As a further improvement to the aforementioned technical solution, each of the pairs of fluid streams has mutually-mirroring flow directions. 
     In order to solve the aforementioned technical problems, an embodiment of the present disclosure further provides a water tank structure, and the water tank structure comprises a tank body and a tank cover assembly; 
     the tank body defines an accommodation cavity therein, and a first end of the tank body defines an opening in communication with the accommodation cavity; 
     the tank cover assembly comprises a cover body and a first flow channel; the cover body is disposed at a first end of the tank body proximate to the opening; the first flow channel is in communication with the cover body and the accommodation cavity; a terminal end of the first flow channel is provided with an even number of outlets;
 
a fluid flowing in through the first flow channel is divided into a same number of fluid streams as the number of the outlets, and the fluid streams are formed into pairs, in which a first fluid stream of each pair and a second fluid stream of each pair have equal kinetic energies.
 
     As a further improvement to the aforementioned technical solution, the tank cover assembly comprises a second flow channel, and the second flow channel is in communication with the cover body and the accommodation cavity; 
     the fluid streams collide with each other in the accommodation cavity such that air entrained in the fluid streams is separated therefrom, and the air separated from the fluid streams flows outside through the second flow channel. 
     As a further improvement to the aforementioned technical solution, all of the outlets of the first flow channel are directed towards a side wall of the tank body. 
     As a further improvement to the aforementioned technical solution, an inlet of the second flow channel is directed towards the side wall of the tank body. 
     As a further improvement to the aforementioned technical solution, a top end surface of the cover body is sloped; the cover body comprises a first end having a first height and a second end connected to the first end and having a second height greater than the first height; and the second flow channel is correspondingly disposed at the second end of the cover body. 
     As a further improvement to the aforementioned technical solution, the tank cover assembly comprises a filtration assembly; the filtration assembly comprises a support and a filter; at a position corresponding to an outlet of the second flow channel, an end of the cover body away from the tank body defines a discharging cavity configured to cause the air separated from the fluid streams to flow out; 
     the support is disposed on the cover body, and at a position corresponding to the discharging cavity of the cover body, a hollow portion is disposed on the support, and the filter is disposed on the hollow portion of the support. 
     In order to solve the aforementioned technical problems, an embodiment of the present disclosure further provides a vacuum cleaner using the following technical solution: the vacuum cleaner comprises a machine body and the aforementioned water tank structure; the water tank structure is detachably connected to the machine body. 
     As a further improvement to the aforementioned technical solution, the vacuum cleaner comprises a floor brush, a suction producing device, and a connecting tube; the floor brush, the water tank structure and the suction producing device are sequentially mounted on the machine body; 
     the connecting tube comprises a first end and a second end opposing and connected to the first end; the first end of the connecting tube is connected to the floor brush; the second end of the connecting tube is connected to the tank cover assembly of the water tank structure and is configured to be in communication with an inlet of the first flow channel; when subject to suction produced by the suction producing device, air-entrained dirty water and debris collected after a flow is scrubbed by the floor brush flow along the connecting tube through the first flow channel into the accommodation cavity of the tank body. 
     As a further improvement to the aforementioned technical solution, the vacuum cleaner further comprises a first seal member; wherein the first seal member is disposed at a connection point of the connecting tube and the tank cover assembly. 
     As a further improvement to the aforementioned technical solution, the vacuum cleaner further comprises a second seal member; wherein at a position at an outlet of the second flow channel, the second seal member is disposed at a connection point of the water tank structure and the machine body. 
     Compared with the prior art, the water tank structure and the vacuum cleaner provided by the embodiments of the present disclosure mainly have the following benefits: 
     in the water tank structure, the flow divider is disposed on the cover body covering the tank body such that a fluid, such as air-entrained dirty water and debris, can enter the accommodation cavity of the tank body by means of the flow divider. The flow divider is disposed on the cover body of the tank cover assembly such that the internal structure of the tank body can be simplified, reducing occupied space and facilitating cleaning. 
     In addition, when subject to suction, a fluid such as air-entrained dirty water and debris flows from the cover body through the flow divider and is divided in the flow divider into a plurality of fluid streams formed into pairs having opposing directions. The plurality of fluid streams flow into the accommodation cavity and collide with each other, such that the air entrained in the dirty water and debris is separated therefrom. The dirty water and debris are subject to the inertial effect caused by gravity and enter the bottom of the accommodation cavity of the tank body, and the air is discharged to an external environment, such that an interaction between kinetic energy of the air and kinetic energy of the dirty water and debris in the tank body can be suppressed, thereby suppressing fluctuation of the liquid level in the accommodation cavity of the tank body, effectively preventing the dirty water and debris from being blown away by the air into a motor or to the external environment and increasing the degree of separation of the air from the dirty water and debris. 
     In summary, the water tank structure has a simple structure and large storage space, can be easily cleaned and has high degree of separation of air from dirty water and debris. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To illustrate the solutions in the present disclosure more clearly, the drawings to be used in the description of the embodiments will be introduced briefly as follows. It is apparent that the drawings in the following description are merely some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without any inventive efforts. In the drawings: 
         FIG. 1  is an exploded perspective view of a water tank structure according to an embodiment of the present disclosure; 
         FIG. 2  is a perspective structural view of the water tank structure in  FIG. 1 ; 
         FIG. 3  is a perspective structural view of a vacuum cleaner according to an embodiment of the present disclosure; 
         FIG. 4  is an exploded view of a partial structure of the vacuum cleaner in  FIG. 3 ; and 
         FIG. 5  is a sectional view of a longitudinal cross-section of the vacuum cleaner in  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Unless defined otherwise, all of the technical and scientific terms used herein have the same meanings as those usually understood by those of ordinary skill in the art in the technical field of the present disclosure. The terms used in the specification herein are merely intended to describe specific embodiments, and are not intended to limit the present disclosure. For example, directions or positions indicated by terms such as “length,” “width,” “up,” “down,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “in” and “out” are directions and positions shown on the basis of the drawing. These terms are merely for ease of description and cannot be construed as a limitation to the technical solution. 
     Terms “include” and “have” and any variations thereof in the description, claims and the brief description of the drawings of the present disclosure are intended to cover non-exclusive inclusion. Terms such as “first” and “second” in the description and claims or the brief description of the drawings of the present disclosure are used to distinguish between different objects and are not used to describe a specific sequence. In the description, claims and the brief description of the drawings of the present disclosure, when an element is described as being “fixed on” or “mounted on” or “disposed on” or “connected to” another element, the element can be directly or indirectly located on the other element. For example, when an element is described as being “connected to” another element, the element can be directly or indirectly connected to the other element. 
     In addition, when an “embodiment” is referred to herein, it means that specific features, structures, or characteristics described with reference to the embodiment can be included in at least one embodiment of the present disclosure. When used in different locations in the description, this term does not necessarily refer to the same embodiment and does not refer to an independent or alternative embodiment mutually exclusive to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments. 
     It should be noted that the water tank structure  100  is used in a cleaning apparatus and is configured to store debris and/or dirty water. For example, the water tank structure  100  is used in a vacuum cleaner  2000 . As shown in  FIG. 3  to  FIG. 5 , the vacuum cleaner  2000  includes the water tank structure  100 , a machine body  200 , a floor brush  300 , a connecting tube  400 , a suction producing device  500 , etc. The floor brush  300 , the water tank structure  100  and the suction producing device  500  are sequentially mounted on the machine body  200  from bottom to top. The water tank structure  100  is used to store dirty water and debris collected after floor scrubbing (the material of the floor being scrubbed is not limited) by the floor brush  300  of the vacuum cleaner  2000 . Certainly, in other embodiments, the water tank structure  100  can also be used in other cleaning apparatuses, and is not specifically limited herein. For ease of description, the following description mainly focuses on the vacuum cleaner  2000 . 
     An embodiment of the present disclosure specifically further provides a water tank structure  100 . As shown in  FIG. 1 , the water tank structure  100  includes a tank body  1  and a tank cover assembly  2 . The tank body  1  has an accommodation cavity  11  therein, and an end of the tank body  1  is formed with an opening  12  in communication with the accommodation cavity  11 . The tank cover assembly  2  includes a cover body  21  and at least one flow divider  22 , and the cover body  21  is disposed at an end of the tank body  1  proximate to the opening  12 . The flow divider  22  is in communication with the cover body  21  and the accommodation cavity  11 . The flow divider  22  is configured to divide a fluid flowing therethrough into a plurality of fluid streams formed into pairs having paired kinetic energies carried thereby and paired opposing flow directions, such that the kinetic energies of the pairs of fluid streams cancel out to increase the available space of the water tank structure  100 . It should be noted that as used in the statement “the plurality of fluid streams formed into pairs having paired opposing flow directions,” “paired opposing flow directions” means “paired completely opposing flow directions” or “paired substantially opposing flow directions.” 
     It can be understood that when subject to suction, a fluid such as air-entrained dirty water and debris enters the cover body  21  and then flows through the flow divider  22 , and the air-entrained dirty water and debris are divided in the flow divider  22  into the plurality of fluid streams formed into pairs having paired kinetic energies carried thereby and paired opposing flow directions. The plurality of fluid streams flow into the accommodation cavity  11  and collide with each other such that the kinetic energies of the pairs of fluid streams cancel out to increase the available space of the water tank structure  100 , such that the air entrained in the dirty water and debris is separated therefrom. The dirty water and debris subject to an inertial effect caused by gravity enter the bottom of the accommodation cavity  11  of the tank body  1 , and the air is discharged to an external environment such that an interaction between kinetic energy of the air and kinetic energy of the dirty water and debris in the tank body  1  is suppressed, and fluctuation of the liquid level in the accommodation cavity  11  of the tank body  1  is suppressed, thereby effectively preventing the dirty water and debris from being blown away by the air into a motor or to the external environment, increasing the degree of separation of the air from the dirty water and debris and further increasing the available space of the water tank. 
     In some embodiments, the plurality of fluid streams form into pairs having equal kinetic energies carried thereby. It should be noted that as used in the statement “the plurality of fluid streams form into pairs having equal kinetic energies carried thereby,” “equal” means “completely equal” or “substantially equal,” such that the kinetic energies of the pairs of fluid streams cancel out to increase the available space of the water tank structure  100 , thereby further effectively preventing the dirty water and debris from being blown away by the air into the motor or to the external environment and increasing the degree of separation of the air from the dirty water and debris. 
     In some embodiments, the ratio of the maximum kinetic energy to the minimum kinetic energy carried by any one of the plurality of pairs of fluid streams is greater than 0.9 such that the degree of separation of the air from the fluid can be further improved when the plurality of fluid streams collide with each other. It should be noted, any difference between the maximum kinetic energy and the minimum kinetic energy carried by any one of the plurality of pairs of fluid streams is included within the scope of this disclosure as long as the difference falls within the range of kinetic energy differences enabling the separation of the air from the fluid. 
     In some embodiments, the plurality of fluid streams form into pairs having mutually-mirroring flow directions, such that after entering the accommodation cavity  11 , the plurality of fluid streams can accurately collide with each other head-on, thereby increasing the degree of collision between fluid streams and further improving the separation between water and air. It should be noted that as used in the statement “the plurality of fluid streams form into pairs having mutually-mirroring flow directions,” “mutually-mirroring flow directions” means “completely mutually-mirroring flow directions” or “substantially mutually-mirroring flow directions.” 
     An embodiment of the present disclosure provides a water tank structure  100 . As shown in  FIG. 1  and  FIG. 2 , the water tank structure  100  includes a tank body  1  and a tank cover assembly  2 . The tank cover assembly  2  is disposed on a top end of the tank body  1 . 
     Specifically as shown in  FIG. 1  and  FIG. 2 , the tank body  1  has an accommodation cavity  11  therein. It can be understood that the tank body  1  can specifically be in the shape of a cup, no other structures are present in the accommodation cavity  11  of the tank body  1 , and an inner wall of the accommodation cavity  11  is smooth and rounded so as to facilitate rinsing. In addition, an end (specifically the top end) of the tank body  1  is formed with an opening  12  in communication with the accommodation cavity  11 . The tank cover assembly  2  includes a cover body  21  and a first flow channel  22 . The cover body  21  is disposed on an end (specifically the top end) of the tank body  1  proximate to the opening  12 . It can be understood that the cover body  21  of the tank cover assembly  2  covers the tank body  1  such that a sealed space is formed in the tank body  1 . The cover body  21  can specifically be detachable relative to the tank body  1  such that the tank body  1  can be detached therefrom and cleaned. The first flow channel  22  is in communication with the cover body  21  and the accommodation cavity  11 . A terminal end of the first flow channel  22  is provided with an even number of outlets  221 . 
     A fluid flowing in through the first flow channel  22  is divided into the same number of fluid streams as the number of the outlets  221 , and a plurality of fluid streams are formed into pairs, in which the plurality of fluid streams form into pairs having equal kinetic energies carried thereby. It should be noted that the statement “the plurality of fluid streams form into pairs having equal kinetic energies carried thereby” means the plurality of fluid streams form into pairs having completely equal or substantially equal kinetic energies carried thereby. 
     It can be understood that the operating principle of the water tank structure  100  is substantially as follows: when subject to suction, a fluid such as air-entrained dirty water and debris enters the cover body  21 , then flows through the first flow channel  22  and collides with an inner tube wall of the first flow channel  22  such that the air-entrained dirty water and debris are divided in the first flow channel  22  and are divided by the outlets  221  into the same number of fluid streams as the number of the outlets  221 , and a plurality of fluid streams are formed into pairs. The plurality of fluid streams flow into the accommodation cavity  11  and collide with each other such that the air entrained in the dirty water and debris is separated therefrom. The dirty water and debris subject to the inertial effect caused by gravity enter the bottom of the accommodation cavity  11  of the tank body  1 , and the air is discharged to an external environment. 
     In summary, compared with the prior art, the water tank structure  100  has at least the following benefits: in the water tank structure  100 , the first flow channel  22  is disposed on the cover body  21  covering the tank body  1  such that the fluid, such as the air-entrained dirty water and debris, can flow through the first flow channel  22  into the accommodation cavity  11  of the tank body  1 , and the air is separated from the dirty water and debris and discharged to the external environment. In addition, the first flow channel  22  is disposed on the cover body  21  of the tank cover assembly  2 , thereby simplifying the internal structure of the tank body  1 , reducing occupied space and facilitating cleaning. In addition, when subject to suction, a fluid such as air-entrained dirty water and debris flows from the cover body  21  through the first flow channel  22  and is divided by the outlets  221  of the first flow channel  22  into the same number of fluid streams as the number of the outlets  221 , and a plurality of fluid streams are formed into pairs. The plurality of fluid streams flow into the accommodation cavity  11  and collide with each other to generate opposing cyclone air streams colliding with each other such that an interaction between kinetic energy of the air and kinetic energy of the dirty water and debris in the tank body  1  is suppressed, and fluctuation of the liquid level in the accommodation cavity  11  of the tank body  1  is suppressed, thereby effectively preventing the dirty water and debris from being blown away by the air into a motor or to the external environment and increasing the degree of separation of the air from the dirty water and debris. In summary, the water tank structure  100  has a simple structure and large storage space, can be easily cleaned and has high degree of separation of air from dirty water and debris. 
     In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be described below with reference to the drawings. 
     In some embodiments, the tank cover assembly  2  further includes a second flow channel  23 , and the second flow channel  23  is in communication with the cover body  21  and the accommodation cavity  11 . 
     The plurality of fluid streams collide with each other in the accommodation cavity  11  such that air entrained therein is separated therefrom, and the separated air is capable of flowing to the outside through the second flow channel  23 . It can be understood that the second flow channel  23  is disposed on the cover body  21  of the tank cover assembly  2 , thereby simplifying the internal structure of the tank body  1 , reducing occupied space and facilitating cleaning. In addition, the plurality of fluid streams flow into the accommodation cavity  11  and collide with each other such that the air entrained in the dirty water and debris is separated therefrom. The dirty water and debris subject to the inertial effect caused by gravity enter the bottom of the accommodation cavity  11  of the tank body  1 , and the air can be smoothly discharged to an external environment by means of the second flow channel  23 . 
     In some embodiments as shown in  FIG. 1  and  FIG. 2 , all of the outlets  221  of the first flow channel  22  are directed towards a side wall of the tank body  1 . It can be understood that when subject to suction, a fluid such as air-entrained dirty water and debris flows from the cover body  21  into the first flow channel  22 , and when subject to the suction and the inertial effect caused by gravity of the dirty water and debris, the dirty water and debris entering the first flow channel  22  is divided into the same number of fluid streams as the number of the outlets  221  when colliding with the inner tube wall of the first flow channel  22 , and a plurality of fluid streams are formed into pairs and flow through corresponding outlets  221  respectively into the accommodation cavity  11 . After entering the accommodation cavity  11 , the plurality of fluid streams all hit the side wall of the tank body  1  and then change directions again to generate opposing cyclone air streams colliding with each other such that an interaction between kinetic energy of the air and kinetic energy of the dirty water and debris in the tank body  1  is suppressed, and fluctuation of the liquid level in the accommodation cavity  11  of the tank body  1  is suppressed, thereby effectively preventing the dirty water and debris from being blown away by the air into a motor or to the external environment and improving the separation between water and air. 
     In some embodiments, an inlet of the second flow channel  23  is directed towards a side wall of the tank body  1  so as to better prevent surges in the tank body  1  from entering the inlet of the second flow channel  23 , thereby further increasing the utilization rate of storage space in the tank body  1 . It should be noted that the inlet of the second flow channel  23  and the outlets  221  of the first flow channel  22  are offset so as to prevent the fluid flowing out of the outlets  221  of the first flow channel  22  from directly flowing out through the inlet of the second flow channel  23 . 
     In some embodiments as shown in  FIG. 1  and  FIG. 2 , a top end surface of the cover body  21  is sloped, the cover body  21  includes a low end and a high end connected to the low end, and the second flow channel  23  is correspondingly disposed at the high end of the cover body  21 . It should be noted that the low end of the cover body  21  refers to an end of the cover body  21  where the distance between the top end surface of the cover body  21  and the bottom of the tank body  1  is the shortest, and the high end of the cover body  21  refers to an end of the cover body  21  where the distance between the top end surface of the cover body  21  and the bottom of the tank body  1  is the longest. It can be understood that in a cleaning process of a cleaning apparatus such as the vacuum cleaner  2000 , the accommodation cavity  11  of the tank body  1  is stored with dirty water and debris such that movement of the vacuum cleaner  2000  causes the dirty water stored inside the tank body  1  to form surges. The second flow channel  23  is thus disposed at the high end of the cover body  21  such that the inlet of the second flow channel  23  is located as far as possible away from the bottom of the tank body  1  in a limited space, and therefore the surges are prevented from entering the inlet of the second flow channel  23 , thereby further improving the utilization rate of the storage space of the tank body  1 . 
     In some embodiments as shown in  FIG. 1 , the tank cover assembly  2  further includes a filtration assembly  3 , and the filtration assembly  3  includes a support  31  and a filter  32 . 
     As shown in  FIG. 1  and  FIG. 5 , at a position corresponding to the outlet of the second flow channel  23 , an end of the cover body  21  away from the tank body  1  has a discharging cavity  211  configured to cause the separated air to flow out, and the support  31  is disposed on the cover body  21 . Specifically, the support  31  and the cover body  21  can be an integrally formed structure or separate structures, and is not specifically limited herein. A hollow portion (not shown) is disposed on the support  31 , and the filter  32  is disposed on the hollow portion of the support  31 . It can be understood that the support  31  is provided with the hollow portion at a position corresponding to the discharging cavity  211  such that the support  31  provided with the hollow portion can stably bear the filter  32  and also prevent the filter  32  from being detached from the support  31 . In addition, the position of the hollow portion relative to the discharging cavity  211  enables the air flowing out of the second flow channel  23  to pass through the hollow portion of the support  31 , be further filtered by the filter  32 , and then be discharged to the external environment. It can be understood that the air separated from the dirty water and debris is filtered again using the filter  32  after being discharged from the second flow channel  23 , thereby further purifying the air and effectively preventing dirty water or debris carried in the air from being carried out by the air. It should be noted that in this embodiment, the filter  32  can be a sponge filter. The sponge filter is resilient, has high filtration efficiency and low resistance to air and is repeatedly washable and cheap, and therefore the sponge filter is effective in filtering the air and reducing costs. In addition, in this embodiment, the filter  32  is semi-circular, and correspondingly the hollow portion of the support  31  is also semi-circular. 
     On the basis of the aforementioned water tank structure  100 , an embodiment of the present disclosure further provides a vacuum cleaner  2000 . As shown in  FIG. 3  to  FIG. 5 , the vacuum cleaner  2000  includes a machine body  200  and the aforementioned water tank structure  100 . The water tank structure  100  is vertically detachably connected to the machine body  200 . It should be noted that in this embodiment, the water tank structure  100  is connected to the machine body  200  by means of an engagement structure  900 . Specifically, the engagement structure  900  includes a fastener  910 , a spring  920  and an engagement recess (not shown). The fastener  910  is connected to the cover body  21  using the spring  920 . At a position corresponding to the fastener  910 , the engagement recess is disposed on the machine body  200 . The fastener  910  engages with and is connected to the engagement recess, thereby achieving a firm connection and facilitating detachment. It can be understood that the water tank structure  100  is detachably connected to the machine body  200 ; and when the water tank structure  100  needs to be cleaned, the water tank structure  100  is detached from the machine body  200  for cleaning, thereby achieving easy detachment and mounting. 
     In summary, compared with the prior art, the vacuum cleaner  2000  has at least the following benefits: in the water tank structure  100  used by the vacuum cleaner  2000 , the first flow channel  22  is disposed on the cover body  21  covering the tank body  1  such that the fluid, such as the air-entrained dirty water and debris, can flow through the first flow channel  22  into the accommodation cavity  11  of the tank body  1 , and the air is separated from the dirty water and debris and discharged to the external environment. In addition, the first flow channel  22  is disposed on the cover body  21  of the tank cover assembly  2 , thereby simplifying the internal structure of the tank body  1 , reducing occupied space and facilitating cleaning. In addition, when subject to suction, a fluid, such as air-entrained dirty water and debris, flows from the cover body  21  through the first flow channel  22  and is divided by the outlets  221  of the first flow channel  22  into the same number of fluid streams as the number of the outlets  221 , and a plurality of fluid streams are formed into pairs. The plurality of fluid streams flow into the accommodation cavity  11  and collide with each other to generate opposing cyclone air streams colliding with each other such that an interaction between kinetic energy of the air and kinetic energy of the dirty water and debris in the tank body  1  is suppressed, and fluctuation of the liquid level in the accommodation cavity  11  of the tank body  1  is suppressed, thereby effectively preventing the dirty water and debris from being blown away by the air into a motor or to the external environment and increasing the degree of separation of the air from the dirty water and debris. In summary, the vacuum cleaner  2000  has a simple structure and large storage space, can be easily cleaned and has high degree of separation of air from dirty water and debris. 
     In some embodiments as shown in  FIG. 4  and  FIG. 5 , the vacuum cleaner  2000  further includes a floor brush  300 , a connecting tube  400  and a suction producing device  500 . The floor brush  300 , the water tank structure  100  and the suction producing device  500  are sequentially mounted on the machine body  200  from bottom to top. The floor brush  300  is configured to scrub a floor. The water tank structure  100  is configured to store dirty water and debris collected after floor scrubbing. The suction producing device  500  is configured to produce suction such that the air-entrained dirty water and debris collected after floor scrubbing by the floor brush  300  enter the water tank structure  100  and flow out therefrom. It should be noted that the machine body  200  has a container cavity (not shown) therein. The suction producing device  500  and a power source  600  are both accommodated in the container cavity, and a suction port of the suction producing device  500  is aligned with a bottom end of the machine body  200 . At a position corresponding to the outlet of the second flow channel  23 , the bottom end of the machine body  200  defines a hollow structure or a mesh structure, and the machine body  200  is provided with an air outlet in communication with the container cavity. The connecting tube  400  includes a first end and a second end opposing and connected to the first end, i.e., two opposite ends of the connecting tube  400 . The first end of the connecting tube  400  is connected to the floor brush  300 . The second end of the connecting tube  400  is connected to the tank cover assembly  2  of the water tank structure  100 . The second end of the connecting tube  400  is configured to be in communication with the inlet of the first flow channel  22 . When subject to suction produced by the suction producing device  500 , air-entrained dirty water and debris collected after floor scrubbing by the floor brush  300  flow along the connecting tube  400  and through the first flow channel  22  and enter the accommodation cavity  11  of the tank body  1  to form liquid flows colliding with each other, such that air is separated therefrom, rises to an upper portion of the accommodation cavity  11 , is discharged from the water tank structure  100  through the second flow channel  23 , then enters the container cavity and flows out through the air outlet. 
     In some embodiments as shown in  FIG. 2  and  FIG. 4 , in order to improve the compactness of the structure, an edge of the tank body  1  is recessed in the lengthwise direction of the machine body  200  towards a central axis of the tank body  1  to form a recess  13  for accommodating the connecting tube  400 , such that the connecting tube  400  can be fit to the tank body  1  and extend into the tank body  1  from the top end thereof. 
     In some embodiments as shown in  FIG. 5 , the vacuum cleaner  2000  further includes the power source  600 . The power source  600  is disposed in the machine body  200 . The power source  600  is configured to supply power to the floor brush  300  and the suction producing device  500 . It should be noted that in other embodiments, the vacuum cleaner  2000  can also be powered by main power, which is not specifically limited herein. 
     In some embodiments as shown in  FIG. 4 , the vacuum cleaner  2000  further includes a first seal member  1100 . The first seal member  1100  is disposed at a connection point of the connecting tube  400  and the tank cover assembly  2 . It should be noted that the first seal member  1100  can be specifically disposed at a tube opening of the connecting tube  400  or on the tank cover assembly  2 . It can be understood that the first seal member  1100  improves sealing at a connection point of the connecting tube  400  and the tank cover assembly  2 , thereby preventing the air entrained in the dirty water and debris from flowing out from the connection point of the connecting tube  400  and the tank cover assembly  2 . 
     In some embodiments as shown in  FIG. 4 , the vacuum cleaner  2000  further includes a second seal member  1200 . At a position at the outlet of the second flow channel  23 , the second seal member  1200  is disposed at a connection point of the water tank structure  100  and the machine body  200 . It should be noted that the second seal member  1200  can be specifically disposed at the outlet of the second flow channel  23  or on the machine body  200 . It can be understood that the second seal member  1200  can improve sealing at the connection point of the outlet of the second flow channel  23  of the water tank structure  100  and the machine body  200 , thereby preventing affecting the suction effect of the suction producing device  500 . 
     In some embodiments as shown in  FIG. 3 , the vacuum cleaner  2000  further includes a clean water tank  1000 . The clean water tank  1000  is disposed on the machine body  200 . The clean water tank  1000  is connected to the floor brush  300  by means of a water tube so as to spray water to the floor brush  300  and provide a water source for scrubbing the floor. 
     In some embodiments as shown in  FIG. 3 , the vacuum cleaner  2000  further includes a handle  700 . The handle  700  is disposed at the top end of the machine body  200  so as to facilitate gripping during cleaning, thereby improving use comfort. 
     In some embodiments as shown in  FIG. 3 , the vacuum cleaner  2000  further includes a power button  800 . The power button  800  is disposed on the handle  700 . The power button  800  is electrically connected to the power source  600  so as to control an operating state of the vacuum cleaner  2000 . 
     The above descriptions are merely the preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various alterations and changes. Any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present disclosure shall fall within the scope of the claims of the present disclosure.