Cleaning machine and overflow control method

Abstract

The invention relates to a cleaning machine and an overflow control method, the cleaning machine comprises a first water tank, a cleaning liner, a sewer pipe and a drainer, the sewer pipe is provided with a water passing port, the water passing port is provided with a water passing joint, the water passing joint is respectively provided with a first interface and a second interface, and the drainer is internally provided with an overflow channel. The control mechanism is used for respectively controlling opening and closing of the first interface and the second interface; in the initial state, the overflow channel is closed, the first connector and the second connector are opened, in the state that the overflow channel is opened and water flows through, the first connector is closed, the second connector is opened, and in the state that the first connector is opened and water flows through, the second connector is closed. Water can be smoothly drained when the first water tank and the cleaning inner container overflow, the problems of water leakage and the like caused by overflow are avoided, water can be prevented from returning to the cleaning inner container or the first water tank during overflow drainage, accordingly, the cleaning inner container and the first water tank are prevented from being polluted, the use safety is guaranteed, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and in particular to a cleaning machine and a water overflow control method. Background Art

[0002] The sink is an indispensable part of the family kitchen. People usually wash food and kitchen utensils in the sink. The sink is provided with an overflow port, so that when the water in the sink exceeds the set maximum water level, the water can flow into the sewer pipe through the overflow port. For example, the Chinese utility model patent "Integrated Sink Overflow Port Structure" with patent number ZL 202322981126.9 (authorization announcement number CN220928081U) and so on. Furthermore, modern kitchens generally have double sinks, one of which is used as a daily washing sink, and the other as a functional sink for a sink cleaning machine, such as the Chinese invention patent "A sink and a cleaning machine using the sink" with application number CN202410736234.6 (publication number CN118633878A), and the Chinese utility model patent "Sink dishwasher and garbage disposal integrated machine" with patent number ZL202322640856.2 (authorization announcement number CN220898637U). When too much water is passed into the functional sink, overflow will also occur. If the overflow of the functional sink and the washing sink cannot be discharged in time, leakage and other problems will occur. In addition, the overflow port of the washing sink and the outlet of the functional sink are connected to the same multi-way joint, so it is easy for the overflow of the washing sink to return to the functional sink or the overflow of the functional sink to return to the washing sink. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a cleaning machine capable of smoothly draining overflow water in view of the prior art.

[0004] The second technical problem to be solved by the present invention is to provide a cleaning machine which can smoothly drain overflow water and effectively avoid backflow of water in view of the prior art.

[0005] The third technical problem to be solved by the present invention is to provide a cleaning machine which can smoothly drain overflow water and effectively detect overflow water in view of the prior art.

[0006] The fourth technical problem to be solved by the present invention is to provide an overflow control method of the above-mentioned cleaning machine in view of the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above technical problems is: a cleaning machine, comprising a first water tank with a water outlet and a cleaning inner tank with a water outlet, and also comprising a downpipe connected to the downpipe and a downpipe embedded in the downpipe, wherein a water outlet is provided on the downpipe, a water outlet is provided on the water outlet, and a water connection joint is provided on the water outlet, and the water connection joint has a first interface for fluid communication with the water outlet and a second interface for fluid communication with the overflow outlet of the first water tank, and is characterized in that the downpipe is provided with an overflow channel for connecting the first water tank and the downpipe, and also comprises a control mechanism for respectively controlling the opening and closing of the first interface and the second interface;

[0008] In the initial state, the overflow channel is closed and the first interface and the second interface are opened respectively, and when the overflow channel is open and water is flowing, the first interface is closed and the second interface is opened, and when the first interface is open and water is flowing, the second interface is closed.

[0009] Furthermore, the drain is hollow inside, an overflow inlet is provided on the top wall of the drain and an overflow outlet is provided on the bottom wall, the overflow inlet, the overflow outlet and the corresponding part of the inner cavity of the drain constitute the overflow channel, and also includes a baffle movably arranged on the drain and used to open and close the overflow inlet. Thus, the internal structure of the drain can be simple and the overflow channel structure can be well formed, and the opening and closing control of the overflow channel can be realized through the baffle.

[0010] Furthermore, the baffle is attached to the top wall of the drain, and a through hole corresponding to the overflow inlet is formed on the baffle, and when the through hole and the overflow inlet are vertically opposite, the overflow inlet is opened, and when the through hole and the overflow inlet are vertically staggered, the overflow inlet is closed. Thus, the opening and closing control of the overflow channel can be better realized through the baffle.

[0011] Furthermore, the cross section of the drain is circular, the overflow inlet is arranged at intervals along the circumferential direction with the straight line where the central axis of the drain is located as the center, the baffle is a circular plate arranged on the bottom surface of the top wall of the drain and can rotate with the straight line where the central axis of the drain is located as the center, and the through holes are arranged at intervals along the circumferential direction with the center of the baffle as the center, and correspond to the overflow inlet one by one. In this way, the opening and closing control of the overflow channel can be realized by rotating the baffle to change the relative position between the through holes on the baffle and the overflow inlet.

[0012] Furthermore, it also includes a motor for driving the baffle to rotate, a drainage pump for controlling the opening and closing of the water outlet, and a sensor for obtaining image information or water pressure information at the first interface and the second interface. The motor, drainage pump and sensor are respectively connected to the controller of the cleaning machine by electrical signals. In this way, the sensor is used to determine whether the first water tank and the cleaning tank are overflowing, and the baffle is controlled by the motor to realize the opening and closing control of the overflow channel. Specifically, when the sensor detects that the first water tank is overflowing, the controller starts the motor, and the motor drives the baffle to open the overflow channel; when the sensor detects that the cleaning tank is overflowing, the drainage pump is controlled to open the water outlet, and the first interface is opened for drainage.

[0013] Furthermore, the water connection joint comprises a water pipe connected to the water port, and the first interface and the second interface are adjacently arranged on the water pipe.

[0014] The control mechanism comprises a transmission rod, a sealing block, a first elastic member acting on the transmission rod, and a second elastic member acting on the sealing block, wherein the sealing block is used to seal the first interface and the second interface respectively, the transmission rod is arranged in the water pipe along the length direction of the water pipe, and the water pipe is provided with a hinge seat, the middle part of the transmission rod is connected to the hinge seat, the sealing block is installed on the first end of the transmission rod, the first interface is located above the first end of the transmission rod and higher than the second interface, and the second end of the transmission rod is exposed in the sewer pipe and is opposite to the overflow outlet of the sewer up and down,

[0015] In the initial state, the sealing block is lower than the first interface and higher than the second interface; when the overflow channel is open and water is flowing, the second end of the transmission rod rotates downward under the action of water pressure, so that the first end of the transmission rod rotates upward and pushes the sealing block into the first interface, the first interface is closed, and the first elastic member accumulates potential energy so that the second end of the transmission rod has a tendency to rotate upward and reset, and at the same time, the second elastic member accumulates potential energy so that the sealing block has a tendency to detach from the first interface; when the first interface is open and water is flowing, the first end of the transmission rod rotates downward under the action of water pressure and pushes the sealing block into the second interface, the second interface is closed, and the second elastic member accumulates potential energy so that the sealing block has a tendency to detach from the second interface. It can be seen that the control mechanism in the present invention has a simple structure and can effectively realize the opening and closing control of the first interface and the second interface under the cooperation of water pressure (the water pressure of the overflow channel and the water pressure of the first interface).

[0016] Furthermore, the upper end of the downpipe extends vertically and is provided with the water opening. The water pipe extends upwardly at an angle relative to the upper end of the downpipe. The first interface is provided at the upper part of the water pipe and the second interface is the free end of the water pipe.

[0017] The first elastic member is a spring extending vertically, the lower end of which is connected to the second end of the transmission rod and the upper end is connected to a horizontally arranged force plate, and the force plate is vertically opposite to the overflow outlet of the drain, and the second elastic member is a spring arranged vertically, and the upper end of which is connected to the bottom of the sealing block and the lower end is connected to the first end of the transmission rod. The force plate can amplify the water pressure from top to bottom in the overflow channel, so that the water pressure can better act on the transmission rod through the first elastic member, thereby improving the sensitivity of the opening and closing control of the first interface, and the second elastic member is conducive to the stable installation of the sealing block on the one hand, and can better adjust the relative position relationship between the sealing block and the first interface and the second interface on the other hand, thereby realizing the opening and closing control of the first interface and the second interface.

[0018] Furthermore, the sealing block is spherical in shape, the second elastic member is arranged along the rotation axis direction of the sealing block and perpendicular to the arrangement direction of the transmission rod, and the pipe wall of the water pipe at the junction of the first interface and the second interface is rounded, and in the initial state, the sealing block abuts against the pipe wall at the junction. Thus, the sealing block can better seal the first interface or the second interface, and it is convenient for the sealing block to move between the first interface, the pipe wall at the junction and the second interface, thereby further facilitating the opening and closing control of the first interface and the second interface.

[0019] The technical solution adopted to further solve the fourth technical problem is: an overflow control method of the cleaning machine as described above, characterized in that:

[0020] Determine whether the first water tank is overflowing, if yes: open the overflow channel, close the first interface and open the second interface; if no: close the overflow channel, open the first interface and the second interface;

[0021] Determine whether the cleaning tank is overflowing. If so: open the drainage pump of the cleaning tank and open the water outlet, and at the same time, open the first interface and close the second interface; if not: close the drainage pump and close the water outlet, and at the same time, open the first interface and the second interface.

[0022] Furthermore, the cleaning tank is intermittently filled with water, and the single water filling time is T. When the cleaning tank overflows, the opening time of the drainage pump during the single water filling time of the cleaning tank is T1, until the overflow water is drained, and the closing time is T2, and T1+T2=T.

[0023] Compared with the prior art, the advantages of the present invention are that it includes a drain and a control mechanism provided with an overflow channel. In the initial state, the overflow channel is closed and the first interface and the second interface are opened respectively, so that the water storage function of the first water tank can be ensured, and when the water level in the first water tank exceeds the set water level, the water can be drained through the second interface, and at the same time, the washing water in the cleaning tank can also be discharged through the first interface.

[0024] Furthermore, when the overflow channel is open and water is flowing, the first interface is closed and the second interface is opened, so that when the first water tank overflows, the overflow channel and the second interface can cooperate to quickly drain excess water in the first water tank and prevent overflow from the first water tank from returning to the cleaning tank through the first interface.

[0025] Furthermore, when the first interface is open and water is flowing, the second interface is closed, so that excess water entering the cleaning tank can be discharged through the first interface, and water discharged from the cleaning tank can be prevented from returning to the first water tank through the second interface.

[0026] It can be seen that the present invention can drain water smoothly when the first water tank and the cleaning tank overflow, avoiding problems such as leakage caused by the overflow, and can prevent water from flowing back into the cleaning tank or the first water tank when draining the overflow, thereby avoiding contamination of the cleaning tank and the first water tank, ensuring safety of use, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a cleaning machine in an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a cleaning machine according to an embodiment of the present invention (in a state where the first water tank is overflowing);

[0029] Figure 3 for Figure 2 A magnified view of part A;

[0030] Figure 4 It is a structural schematic diagram of the drainer in the overflow state of the first water tank in an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the drainer when the cleaning tank is overflowing in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0034] like Figures 1 to 5 As shown, a cleaning machine comprises a first water tank 1 having a water outlet 11 and a cleaning inner tank 2 having a water outlet 22, and also comprises a water pipe 5 connected to the water outlet 11 and a water drain 3 embedded in the water outlet 11. The water pipe 5 is provided with a water opening 51, and the water opening 51 is provided with a water connection 6, and the water connection 6 has a first interface 62 for fluid communication with the water outlet 22 and a second interface 63 for fluid communication with the overflow port (not shown) of the first water tank 1.

[0035] Furthermore, the drain 3 is provided with an overflow channel for connecting the first water tank 1 and the drain pipe 5, and also includes a control mechanism 7 for respectively controlling the opening and closing of the first interface 62 and the second interface 63. In the initial state, the overflow channel is closed and the first interface 62 and the second interface 63 are respectively opened, and when the overflow channel is opened and water is flowing, the first interface 62 is closed and the second interface 63 is opened, and when the first interface 62 is opened and water is flowing, the second interface 63 is closed.

[0036] It can be seen that the washing machine in the present invention includes a drain 3 and a control mechanism 7 provided with an overflow channel. In the initial state, the overflow channel is closed and the first interface 62 and the second interface 63 are opened respectively, so that the water storage function of the first water tank 1 can be ensured, and when the water level in the first water tank 1 exceeds the set water level, the water can be drained through the second interface 63, and the washing water in the washing liner 2 can also be discharged through the first interface 62. Further, when the overflow channel is opened and water is passed, the first interface 62 is closed and the second interface 63 is opened, so that when the first water tank 1 overflows, the overflow channel and the second interface 63 can cooperate to quickly discharge the excess water in the first water tank 1, and can prevent the overflow of the first water tank 1 from returning to the washing liner 2 through the first interface 62. Further, when the first interface 62 is opened and water is passed, the second interface 63 is closed, so that the excess water introduced into the washing liner 2 can be discharged through the first interface 62, and can prevent the water discharged from the washing liner 2 from returning to the first water tank 1 through the second interface 63. It can be seen that the present invention can drain water smoothly when overflow occurs in the first water tank 1 and the cleaning tank 2, avoiding problems such as leakage caused by the overflow, and can prevent water from flowing back into the cleaning tank 2 or the first water tank 1 when draining the overflow, thereby avoiding contamination of the cleaning tank 2 and the first water tank 1, ensuring safety of use, and improving the user experience.

[0037] In this embodiment, the cleaning tank 2 is specifically a second water tank arranged side by side with the first water tank 1, and a door 21 for covering the second water tank is arranged on the upper opening of the second water tank, and the water outlet 22 is opened on the bottom wall of the cleaning tank 2. In addition, the first interface 62 is connected to the overflow port through an overflow pipe (not shown), and the second interface 63 is connected to the water outlet 22 through a drain pipe 9.

[0038] Furthermore, in this embodiment, specifically, the interior of the drain 3 is hollow, an overflow inlet 31 is provided on the top wall of the drain 3, and an overflow outlet 32 ​​is provided on the bottom wall, and the overflow inlet 31, the overflow outlet 32 ​​and the corresponding part of the inner cavity of the drain 3 constitute the overflow channel. Furthermore, a baffle 4 is movably arranged on the drain 3 and used to open and close the overflow inlet 31. In this way, the internal structure of the drain 3 can be simplified and the overflow channel structure can be formed well, and the opening and closing control of the overflow channel can be realized through the baffle 4.

[0039] In order to better control the opening and closing of the overflow channel through the baffle plate 4, the baffle plate 4 is attached to the top wall of the drain 3, and the baffle plate 4 is provided with a through hole 41 corresponding to the overflow inlet 31, and in a state where the through hole 41 and the overflow inlet 31 overlap each other (such as Figure 4 As shown), the overflow inlet 31 is opened, and the through hole 41 and the overflow inlet 31 are staggered up and down (as shown in FIG. Figure 5As shown), the overflow inlet 31 is closed. Further preferably, the cross section of the drain 3 is circular, the overflow inlet 31 is arranged at intervals along the circumferential direction with the straight line where the central axis of the drain 3 is located as the center, the baffle 4 is a circular plate arranged directly on the bottom surface of the top wall of the drain 3, and can rotate with the straight line where the central axis of the drain 3 is located as the center, and the through holes 41 are arranged at intervals along the circumferential direction with the center of the baffle 4 as the center, and correspond one by one to the overflow inlet 31. In this way, the opening and closing control of the overflow channel can be achieved by rotating the baffle 4 to change the relative position between the through holes 41 on the baffle 4 and the overflow inlet 31.

[0040] Furthermore, it also includes a motor 42 for driving the baffle 4 to rotate, a drainage pump (not shown) for controlling the opening and closing of the water outlet 22, and a sensor 8 for obtaining the image information or water pressure information at the first interface 62 and the second interface 63. The motor 42, the drainage pump and the sensor 8 are respectively connected to the controller of the cleaning machine by electrical signals. In this way, the sensor 8 is used to determine whether the first water tank 1 and the cleaning liner 2 are overflowing, and the baffle 4 is controlled by controlling the motor 42 to realize the opening and closing control of the overflow channel. Specifically, when the sensor 8 detects that the first water tank 1 is overflowing, the controller starts the motor 42, and the motor 42 drives the baffle 4 to open the overflow channel; when the sensor 8 detects that the cleaning liner 2 is overflowing, the drainage pump is controlled to open the water outlet 22, and the first interface 62 is opened for drainage. Specifically, the sensor 8 can be a visual sensor or a Hall sensor, wherein the visual sensor can collect image information at the first interface 62 and the second interface 63, and the Hall sensor can collect water pressure information at the first interface 62 and the second interface 63, and compare the collected information to determine whether there is overflow or backflow at the first interface 62 and the second interface 63. In this embodiment, a vertically extending shaft 43 is fixed to the output shaft of the motor 42, the upper end of the shaft 43 is fixed to the baffle 4, and the shaft 43 is covered with a protective cover 44.

[0041] Further, the water connection joint 6 comprises a water pipe 61 connected to the water port 51, and the first interface 62 and the second interface 63 are adjacently arranged on the water pipe 61. The control mechanism 7 comprises a transmission rod 71, a sealing block 72, a first elastic member 73 acting on the transmission rod 71, and a second elastic member 74 acting on the sealing block 72. The sealing block 72 is used to seal the first interface 62 and the second interface 63 respectively, the transmission rod 71 is arranged in the water pipe 61 along the length direction of the water pipe 61, and a hinge seat 76 is arranged in the water pipe 61, the middle part of the transmission rod 71 is connected to the hinge seat 76, the sealing block 72 is installed on the first end of the transmission rod 71, the first interface 62 is located above the first end of the transmission rod 71 and higher than the second interface 63, and the second end of the transmission rod 71 is exposed in the sewer pipe 5 and is opposite to the overflow outlet 32 ​​of the drain 3. In the initial state, the sealing block 72 is lower than the first interface 62 and higher than the second interface 63; when the overflow channel is opened and water is flowing, the second end of the transmission rod 71 rotates downward under the action of water pressure, so that the first end of the transmission rod 71 rotates upward and pushes the sealing block 72 into the first interface 62, the first interface 62 is closed, and the first elastic member 73 accumulates potential energy so that the second end of the transmission rod 71 has a tendency to rotate upward and reset, and at the same time, the second elastic member 74 accumulates potential energy so that the sealing block 72 has a tendency to detach from the first interface 62; when the first interface 62 is opened and water is flowing, the first end of the transmission rod 71 rotates downward under the action of water pressure and pushes the sealing block 72 into the second interface 63, the second interface 63 is closed, and the second elastic member 74 accumulates potential energy so that the sealing block 72 has a tendency to detach from the second interface 63. It can be seen that the control mechanism 7 in the present invention has a simple structure and can effectively realize the opening and closing control of the first interface 62 and the second interface 63 under the cooperation of water pressure (water pressure of the overflow channel or water pressure of the first interface 62).

[0042] Preferably, in this embodiment, the upper end of the water pipe 5 extends vertically and is provided with the water port 51, the water pipe 61 extends upwardly at an angle relative to the upper end of the water pipe 5, the first interface 62 is provided at the upper part of the water pipe 61 and the second interface 63 is the free end of the water pipe 61. The first elastic member 73 is a spring extending vertically, the lower end of the first elastic member 73 is connected to the second end of the transmission rod 71 and the upper end is connected to a horizontally arranged force plate 75, and the force plate 75 is vertically opposite to the overflow outlet 32 ​​of the water drain 3, the second elastic member 74 is a spring arranged vertically, the upper end of the second elastic member 74 is connected to the bottom of the sealing block 72 and the lower end is connected to the first end of the transmission rod 71. The force-bearing plate 75 can amplify the water pressure from top to bottom in the overflow channel, so that the water pressure can better act on the transmission rod 71 through the first elastic member 73, thereby improving the sensitivity of the opening and closing control of the first interface 62. The second elastic member 74 is conducive to the stable installation of the sealing block 72 on the one hand, and on the other hand, it can better adjust the relative position relationship between the sealing block 72 and the first interface 62 and the second interface 63, thereby realizing the opening and closing control of the first interface 62 and the second interface 63.

[0043] Further preferably, the sealing block 72 is spherical in shape, the second elastic member 74 is arranged along the rotation axis direction of the sealing block 72 and perpendicular to the arrangement direction of the transmission rod 71, and the pipe wall of the water pipe 61 at the junction of the first interface 62 and the second interface 63 is rounded. In the initial state, the sealing block 72 abuts against the pipe wall at the junction, so that the sealing block 72 can better seal the first interface 62 or the second interface 63, and facilitates the sealing block 72 to move between the first interface 62, the pipe wall at the junction and the second interface 63, so as to further facilitate the opening and closing control of the first interface 62 and the second interface 63.

[0044] Further, the overflow control method of the cleaning machine in the present invention is as follows:

[0045] Determine whether the first water tank 1 is overflowing, if yes: open the overflow channel, close the first interface 62 and open the second interface 63; if no: close the overflow channel, open the first interface 62 and the second interface 63;

[0046] Determine whether the cleaning tank 2 is overflowing. If so, open the drainage pump of the cleaning tank 2 and open the water outlet 22. At the same time, open the first interface 62 and close the second interface 63. If not, close the drainage pump and close the water outlet 22. At the same time, open the first interface 62 and the second interface 63. Preferably, in this embodiment, the cleaning tank 2 is intermittently filled with water, and the single water filling time is T. When the cleaning tank 2 overflows, the opening time of the drainage pump within the single water filling time of the cleaning tank 2 is T1, until the overflow is drained, and the closing time is T2, and T1+T2=T.

[0047] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two components or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected to each other, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A cleaning machine, comprising a first water tank (1) having a water outlet (11) and a cleaning inner tank (2) having a water outlet (22), and also comprising a water pipe (5) connected to the water outlet (11) and a water drain (3) embedded in the water outlet (11), wherein: The down pipe (5) is provided with a water inlet (51), and the water inlet (51) is provided with a water connection joint (6), and the water connection joint (6) has a first interface (62) for fluid communication with the water outlet (22) and a second interface (63) for fluid communication with the overflow port of the first water tank (1), and is characterized in that the down pipe (3) is provided with an overflow channel for connecting the first water tank (1) and the down pipe (5), and also includes a control mechanism (7) for controlling the opening and closing of the first interface (62) and the second interface (63), respectively. In the initial state, the overflow channel is closed while the first interface (62) and the second interface (63) are respectively opened; and when the overflow channel is open and water is flowing, the first interface (62) is closed while the second interface (63) is open; and when the first interface (62) is open and water is flowing, the second interface (63) is closed.

2. The cleaning machine according to claim 1, characterized in that: The interior of the drain (3) is hollow, an overflow inlet (31) is provided on the top wall of the drain (3) and an overflow outlet (32) is provided on the bottom wall, the overflow inlet (31), the overflow outlet (32) and the corresponding parts of the inner cavity of the drain (3) constitute the overflow channel, and also includes a baffle (4) movably arranged on the drain (3) and used to open and close the overflow inlet (31).

3. The cleaning machine according to claim 2, characterized in that: The baffle plate (4) is attached to the top wall of the drain (3), and a through hole (41) corresponding to the overflow inlet (31) is formed on the baffle plate (4); and when the through hole (41) and the overflow inlet (31) are vertically opposed, the overflow inlet (31) is opened, and when the through hole (41) and the overflow inlet (31) are vertically staggered, the overflow inlet (31) is closed.

4. The cleaning machine according to claim 3, characterized in that: The cross section of the drain (3) is circular, the overflow inlet (31) is arranged at intervals along the circumferential direction with the straight line where the central axis of the drain (3) is located as the center, the baffle (4) is a circular plate arranged on the bottom surface of the top wall of the drain (3) and can rotate with the straight line where the central axis of the drain (3) is located as the center, and the through holes (41) are arranged at intervals along the circumferential direction with the center of the baffle (4) as the center, and correspond one-to-one with the overflow inlet (31).

5. The cleaning machine according to claim 4, characterized in that: It also includes a motor (42) for driving the baffle (4) to rotate and a sensor (8) for obtaining image information or water pressure information at the first interface (62) and the second interface (63). The motor (42) and the sensor (8) are respectively connected to the controller of the cleaning machine by electrical signals.

6. The cleaning machine according to any one of claims 1 to 5, characterized in that: The water connection joint (6) comprises a water pipe (61) connected to the water port (51), the first interface (62) and the second interface (63) being arranged adjacent to the water pipe (61). The control mechanism (7) comprises a transmission rod (71), a sealing block (72), a first elastic member (73) acting on the transmission rod (71), and a second elastic member (74) acting on the sealing block (72), wherein the sealing block (72) is used to seal the first interface (62) and the second interface (63) respectively, the transmission rod (71) is arranged in the water pipe (61) along the length direction of the water pipe (61), and a hinge seat (76) is arranged in the water pipe (61), the middle part of the transmission rod (71) is connected to the hinge seat (76), the sealing block (72) is installed on the first end of the transmission rod (71), the first interface (62) is located above the first end of the transmission rod (71) and higher than the second interface (63), and the second end of the transmission rod (71) is exposed in the drain pipe (5) and is vertically opposite to the overflow outlet (32) of the drain (3), In an initial state, the sealing block (72) is lower than the first interface (62) and higher than the second interface (63); When the overflow channel is open and water is flowing, the second end of the transmission rod (71) rotates downward under the action of water pressure, so that the first end of the transmission rod (71) rotates upward to push the sealing block (72) into the first interface (62), and the first elastic member (73) accumulates potential energy so that the second end of the transmission rod (71) has a tendency to rotate upward and reset, and at the same time, the second elastic member (74) accumulates potential energy so that the sealing block (72) has a tendency to detach from the first interface (62); When the first interface (62) is open and water is flowing, the first end of the transmission rod (71) rotates downward under the action of water pressure to push the sealing block (72) into the second interface (63), and the second elastic member (74) accumulates potential energy so that the sealing block (72) has a tendency to detach from the second interface (63).

7. The cleaning machine according to claim 6, characterized in that The upper end of the downpipe (5) extends vertically and is provided with the water opening (51). The water pipe (61) extends upwardly at an angle relative to the upper end of the downpipe (5). The first interface (62) is provided at the upper part of the water pipe (61) and the second interface (63) is the free end of the water pipe (61). The first elastic member (73) is a spring extending vertically, the lower end of the first elastic member (73) is connected to the second end of the transmission rod (71) and the upper end is connected to a horizontally arranged force-bearing plate (75), and the force-bearing plate (75) is vertically opposite to the overflow outlet (32) of the drain (3), and the second elastic member (74) is a spring arranged vertically, and the upper end of the second elastic member (74) is connected to the bottom of the sealing block (72) and the lower end is connected to the first end of the transmission rod (71).

8. The cleaning machine according to claim 7, characterized in that The sealing block (72) is spherical in shape, the second elastic member (74) is arranged along the rotation axis direction of the sealing block (72) and is perpendicular to the arrangement direction of the transmission rod (71), and the pipe wall of the water pipe (61) at the junction of the first interface (62) and the second interface (63) is smooth, and in an initial state, the sealing block (72) abuts against the pipe wall at the junction.

9. A method for controlling overflow of a cleaning machine as claimed in any one of claims 1 to 8, characterized in that: Determine whether the first water tank (1) is overflowing, if so: open the overflow channel, close the first interface (62) and open the second interface (63); if not: close the overflow channel, open the first interface (62) and the second interface (63); Determine whether the cleaning tank (2) is overflowing. If so, open the drainage pump of the cleaning tank (2) and, at the same time, open the first interface (62) and close the second interface (63); if not, close the drainage pump and, at the same time, open the first interface (62) and the second interface (63).

10. The overflow control method according to claim 9, characterized in that: The cleaning tank (2) is intermittently supplied with water, and the single water supply time is T. When the cleaning tank (2) overflows, the opening time of the drainage pump during the single water supply time of the cleaning tank (2) is T1, until the overflow water is drained, and the closing time is T2, and T1+T2=T.

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