Sewage tank and cleaning equipment

Abstract

The invention provides a sewage tank and cleaning equipment, the sewage tank comprises a tank body, the tank body is internally provided with a water inlet channel and an accommodating cavity, the tank body is provided with an air outlet, and the accommodating cavity is communicated with the water inlet channel and the air outlet; the ultrasonic detection piece is located at the first alarm liquid level in the containing cavity and used for detecting the liquid level in the containing cavity; the first electrode piece is located at a second alarm liquid level in the containing cavity, the liquid level value of the second alarm liquid level is larger than that of the first alarm liquid level, and the second electrode piece is arranged in the containing cavity and spaced from the first electrode piece; and the first electrode piece and the second electrode piece can be conducted by the medium in the accommodating cavity to form a loop.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly, to a sewage tank and a cleaning device. Background Art

[0002] Currently, a floor washer sucks the sewage on the ground into the sewage tank to achieve the purpose of cleaning. Therefore, a liquid level detection and alarm system needs to be set in the sewage tank. When the volume of the sewage tank reaches the designed volume, the body liquid level alarm is triggered to prevent sewage overflow.

[0003] In related technologies, the water full alarm system in the sewage tank mainly includes a float type and an electrode plate resistance measurement type. In the float type, a float is set in the sewage tank. When the liquid level rises, the float rises and blocks the air duct above the float, thereby triggering the fan stall protection to stop the machine. In this solution, foam, a liquid that is easily carried away by air flow, may be generated during the process of sucking sewage, which will affect the float type liquid level alarm system because the foam cannot float the float. Therefore, the float type liquid level detection system will alarm too late in a foamy environment, resulting in water spraying, and at the same time, the volume and noise will also increase. For the electrode plate resistance measurement, two electrode plates are added near the liquid level at the designed volume in the sewage tank. When the liquid level submerges the electrode plates at the same time, the two electrode plates are conducted. When the resistance between the two is low to the threshold value, the alarm stop signal can be triggered. However, after the electrode bracket extending into the sewage tank adheres to the sewage with high conductivity, a conductive circuit may be formed in the upper part of the sewage tank, resulting in the problem that the floor washer alarms prematurely or even cannot be started. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] To this end, a first aspect of the present invention provides a sewage tank.

[0006] A second aspect of the present invention further provides a cleaning device.

[0007] In view of this, a first aspect of the present invention proposes a sewage tank, including: a box body, an inlet channel and a receiving cavity are provided in the box body, the box body is provided with an air outlet, and the receiving cavity is communicated with the inlet channel and the air outlet; an ultrasonic detection member, located at a first alarm liquid level in the receiving cavity, for detecting the liquid level in the receiving cavity; a first electrode member and a second electrode member, the first electrode member is located at a second alarm liquid level in the receiving cavity, the liquid level value of the second alarm liquid level is greater than the liquid level value of the first alarm liquid level, the second electrode member is arranged in the receiving cavity and is spaced from the first electrode member, and the first electrode member and the second electrode member can be conducted by the medium in the receiving cavity to form a circuit.

[0008] The sewage tank provided by the present invention includes a tank body, an ultrasonic detection component, a first electrode component, and a second electrode component. An inlet channel and a receiving cavity are provided inside the tank body, and an air outlet is provided on the tank body. The sewage on the ground to be cleaned enters the receiving cavity through the inlet channel along with the airflow, and the airflow is discharged from the tank body through the air outlet. Among them, the ultrasonic detection component is arranged in the receiving cavity to detect the liquid level in the receiving cavity and provide a water-full alarm function. The detection principle of the ultrasonic detection component is not affected by conductive media, so false alarms will not occur, improving the accuracy of the ultrasonic detection component in detecting the liquid level and reducing the frequency of users pouring water. The first electrode component and the second electrode component are arranged in the receiving cavity at intervals, and the ultrasonic detection component is arranged at the first alarm liquid level, and the first electrode component is arranged at the second alarm liquid level. The liquid level value of the second alarm liquid level is greater than the liquid level value of the first alarm liquid level, that is, the first electrode component is arranged at a position with a higher liquid level after the ultrasonic detection component. In this way, in an environment with foam, when the ultrasonic detection component cannot contact the sewage liquid surface and the foam has begun to float upward with the airflow, the first electrode component and the second electrode component will conduct after the foam rises to the second alarm liquid level, and the first electrode component and the second electrode component provide a water-full alarm function. The sewage tank proposed in this application realizes the alarm function of the sewage tank through the combined action of the ultrasonic detection component, the first electrode component, and the second electrode component, avoids false alarms, can also give an alarm in time in the presence of foam, prevents sewage from spraying out of the air outlet, and can also reduce the occupation of the space inside the sewage tank and reduce the working noise.

[0009] The sewage tank provided according to the present invention may further have the following additional technical features:

[0010] In some possible designs, the tank body further includes: an upper cover assembly, which is installed at the upper end of the tank body. The upper cover assembly includes an extension part extending towards the receiving cavity, and the ultrasonic detection component and the first electrode component are installed on the extension part.

[0011] In this design, the tank body further includes an upper cover assembly. The upper cover assembly is installed at the upper end of the tank body, and an extension part is provided on the upper cover assembly, providing an installation position for the ultrasonic detection component and the first electrode component, so that the ultrasonic detection component and the first electrode component extend into the receiving cavity to facilitate the detection of the liquid level in the receiving cavity.

[0012] In some possible designs, the extension part and the inner wall surface of the receiving cavity enclose an air-water separation area. The air outlet is located outside the air-water separation area. The air-water separation area includes a first outlet end, and the first outlet end communicates with the receiving cavity and is communicated with the air outlet through the receiving cavity; the inlet channel includes a second outlet end, and the second outlet end extends into the air-water separation area from the first outlet end.

[0013] In this design, the extension portion and the inner wall surface of the accommodating chamber enclose an air-water separation zone, the air-water separation zone includes a first outlet end, the water inlet channel includes a second outlet end, and the second outlet end of the water inlet channel extends into the air-water separation zone, so that the air-water separation zone surrounds the second outlet end. After the sewage enters the water inlet channel, it enters the air-water separation zone from the second outlet end, and then flows into the accommodating chamber from the first outlet end of the air-water separation zone; the air outlet is located on the outside of the air-water separation zone, and after the gas enters the air-water separation zone from the water inlet channel, it flows from the first outlet end to the air outlet, thereby realizing the separation of gas and liquid. At the same time, by setting the air-water separation zone to surround the second outlet end, it is also possible to prevent the sewage in the water inlet channel from directly flowing to the ultrasonic detection component and the first electrode component, thereby preventing the occurrence of false alarms in the sewage tank.

[0014] In some possible designs, the extension portion includes: a mounting plate, a portion of the mounting plate is arranged opposite to the second outlet end, and the other portion extends into the accommodating cavity, the ultrasonic detection component is arranged on the portion of the mounting plate extending into the accommodating cavity, and is located on the side of the mounting plate away from the water inlet channel; a first baffle plate is arranged on the first side of the mounting plate and connected to the inner wall surface of the accommodating cavity; a second baffle plate is arranged on the second side of the mounting plate and connected to the inner wall surface of the accommodating cavity, and the first baffle plate, the second baffle plate, the mounting plate and the inner wall surface of the accommodating cavity enclose the gas-water separation zone.

[0015] In this design, the extension portion includes a mounting plate, a first baffle plate and a second baffle plate. A portion of the mounting plate is arranged opposite to the second outlet end to shield the liquid in the water inlet channel and prevent sewage from entering the air outlet with the air flow. Another portion of the mounting plate extends into the accommodating chamber, and the first baffle plate and the second baffle plate are respectively arranged on the first side and the second side of the mounting plate, and are respectively connected to the inner wall surface of the accommodating chamber, and then the mounting plate, the first baffle plate, the second baffle plate and the inner wall surface of the accommodating chamber enclose the air-water separation area to achieve the separation of sewage and air flow. At the same time, the ultrasonic detection component is arranged on the portion of the mounting plate extending into the accommodating chamber and is located on the side of the mounting plate away from the water inlet channel, which can prevent the sewage sucked into the water inlet channel from directly flowing between the receiving end and the transmitting end of the ultrasonic detection component, thereby ensuring the accuracy of the ultrasonic detection component in detecting the liquid level.

[0016] In some possible designs, a mounting groove is provided on a side of the mounting plate facing away from the water inlet channel, and the ultrasonic detection component is arranged in the mounting groove.

[0017] In this design, a mounting groove is provided on the side of the mounting plate facing away from the water inlet channel, and the ultrasonic detection component is arranged in the mounting groove, thereby realizing the installation of the ultrasonic detection component. At the same time, the space occupied by the mounting plate and the ultrasonic detection component as a whole is reduced, and the design volume in the accommodating cavity is increased.

[0018] In some possible designs, the extension portion further includes: at least one third baffle, the at least one third baffle is disposed on a side of the first baffle facing away from the second baffle, and the first electrode member is disposed on the third baffle and is located between the first outlet end and the air outlet.

[0019] In this design, the extension portion further includes at least one third baffle, and the at least one third baffle is disposed on a side of the first baffle facing away from the second baffle, such that the third baffle is located outside the gas-liquid separation zone. Disposing the first electrode member on the third baffle can prevent sewage from splashing onto the first electrode member.

[0020] Optionally, the first electrode member is disposed on a side of the third baffle facing away from the ultrasonic detection member, and the first electrode member is located between the first outlet end and the air outlet. When the foam in the accommodation cavity floats with the airflow, the foam connects the first electrode member and the second electrode member to send out an alarm message.

[0021] In some possible designs, the third baffle is connected to the inner wall surface of the accommodation cavity, and the at least one third baffle, the first baffle and the inner wall surface of the accommodation cavity enclose a gas passage. The first electrode member is located in the gas passage, and the air outlet is communicated with the gas passage.

[0022] In this design, the third baffle is connected to the inner wall surface of the accommodation cavity and encloses a gas passage with the first baffle and the inner wall surface of the accommodation cavity, such that the first electrode member is located in a relatively dry area, which can prevent sewage from splashing onto the first electrode member and can also make the gas discharged from the sewage tank relatively dry.

[0023] In some possible designs, when the number of the third baffles is at least two, the at least two third baffles are respectively disposed on a side of the second baffle facing away from the first baffle and a side of the first baffle facing away from the second baffle; the number of the first electrode members is at least two, and the first electrode member is disposed on any one of the third baffles; or the first electrode member and the second electrode member are respectively disposed on the at least two third baffles.

[0024] In this design, the at least two third baffles are disposed on a side of the second baffle facing away from the first baffle and a side of the first baffle facing away from the second baffle. Correspondingly, the first electrode member can be respectively disposed on the at least two third baffles. Further, when the sewage tank is tilted left and right, the detection can also be respectively performed through the first electrode members on the left and right sides, avoiding the situation that the alarm is not timely when the inclination angle is too large. The first electrode member and the second electrode member can also be respectively disposed on the at least two third baffles, and when the foam contacts both the first electrode member and the second electrode member simultaneously, an alarm reminder is given.

[0025] In some possible designs, the second electrode member is disposed at the bottom of the accommodation cavity.

[0026] In this design, the second electrode member is disposed at the bottom of the accommodating cavity, such that when there is liquid stored in the accommodating cavity, the second electrode member is always immersed in the liquid, while the first electrode member is at a relatively high liquid level. When the foam contacts the first electrode member, the first electrode member and the second electrode member are electrically connected.

[0027] In some possible designs, the upper cover assembly is provided with air outlets, and the air outlets are located on both sides of the extension portion.

[0028] In this design, the upper cover assembly is provided with air outlets which are arranged on both sides of the extension portion, such that the extension portion is arranged to avoid the air outlets, increasing the area of the air outlets to ensure the smooth discharge of the air flow.

[0029] In some possible designs, the sewage tank further includes: a signal connection portion disposed within the upper cover assembly, the signal connection portion being provided with a first pair of interfaces which are exposed on the side of the upper cover assembly away from the tank body, and the ultrasonic detection member is electrically connected to the signal connection portion; and a first sealing member disposed between the signal connection portion and the upper cover assembly.

[0030] In this design, the sewage tank further includes a signal connection portion which is disposed within the upper cover assembly, and the first pair of interfaces are exposed on the side of the upper cover assembly away from the tank body, so as to facilitate the connection of the signal connection portion to other interfaces. The ultrasonic detection member is electrically connected to the signal connection portion to realize the output of the signal of the ultrasonic detection member. The first sealing member is disposed between the signal connection portion and the upper cover assembly, ensuring the insulation performance between the connection line between the ultrasonic detection member and the signal connection portion and the tank body.

[0031] In some possible designs, the ultrasonic detection member includes: a bracket disposed on the extension portion, one end of the bracket extending into the upper cover assembly, and a channel is provided within the bracket; and an ultrasonic sensor disposed within the bracket, and the ultrasonic sensor is electrically connected to the signal connection portion through the channel.

[0032] In this design, the ultrasonic detection member includes an ultrasonic sensor and a bracket for mounting the ultrasonic sensor. The bracket is disposed on the extension portion and extends into the upper cover assembly. Among them, a channel is provided on the bracket, and the ultrasonic sensor is electrically connected to the signal connection portion through the channel, avoiding the leakage of electricity of the ultrasonic sensor and improving the safety performance of the sewage tank.

[0033] In some possible designs, a second sealing member is provided between one end of the bracket extending into the upper cover assembly and the upper cover assembly.

[0034] In this design, a second sealing member is provided between the bracket and one end extending into the upper cover assembly and the upper cover assembly, that is, a primary seal is provided between the bracket and the upper cover assembly, and another primary seal is provided between the signal connection portion and the upper cover assembly, improving the sealing performance of the accommodating cavity.

[0035] In some possible designs, the box body further includes a water drainage channel, which is provided at the bottom of the accommodation cavity.

[0036] In this design, a water drainage channel is also provided at the bottom of the box body, and the water drainage channel is arranged at the bottom of the accommodation cavity to facilitate the discharge of sewage in the accommodation cavity.

[0037] In some possible designs, the sewage tank further includes: an anti-slosh baffle provided in the accommodation cavity; and / or a filter member provided at the air outlet.

[0038] In this design, the sewage tank further includes an anti-slosh baffle, which is arranged in the accommodation cavity to prevent sewage from entering the air outlet when the inclination angle of the sewage tank is too large. The filter member is arranged at the air outlet to filter the air flow, prevent the air flow from carrying foam or sewage out of the air outlet, and improve the dryness of the air flow.

[0039] In some possible designs, a handling portion is provided on the outer surface of the box body.

[0040] In this design, a handling portion is provided on the outer surface of the box body to facilitate the user to take the sewage tank, and thus facilitate the disassembly and installation of the sewage tank.

[0041] In some possible designs, the handling portion includes a groove or a protrusion.

[0042] In this design, the handling portion includes a groove or a protrusion. Of course, it can also be other structures to facilitate the user to hold with the hand.

[0043] According to the second aspect of the present invention, a cleaning device is further provided, including: the sewage tank proposed in any of the above technical solutions.

[0044] The cleaning device provided by the second aspect of the present invention includes the sewage tank proposed in any of the above technical solutions, and thus has all the beneficial effects of the sewage tank.

[0045] In some possible designs, the cleaning device further includes: a main body, the sewage tank is arranged on the main body, and an air inlet and an air outlet are provided on the main body; a fan, arranged on the main body, the fan is communicated with the air outlet through the air inlet, and the fan is communicated with the air outlet.

[0046] In this design, the cleaning device further includes a main body and a fan. The sewage tank is arranged on the main body, and the fan is arranged on the main body and is communicated with the air outlet through the air inlet. When the fan is turned on, a negative pressure can be formed in the box body through the air inlet and the air outlet, and thus sewage can enter the accommodation cavity through the water inlet channel.

[0047] In some possible designs, the main body is provided with: a second pair of interfaces, and the second electrode member can be electrically connected to the second pair of interfaces; a third pair of interfaces, which can be connected to the first pair of interfaces of the sewage tank.

[0048] In this design, a second pair of interfaces and a third pair of interfaces are provided on the main body. The second electrode component can be electrically connected to the second pair of interfaces to achieve power connection of the second electrode component; the third pair of interfaces can be connected to the first pair of interfaces of the sewage tank to achieve power connection of the ultrasonic detection component and the first electrode component.

[0049] The additional aspects and advantages of the present invention will become apparent in the following description section or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0051] Figure 1 FIG. 1 shows one of the schematic structural diagrams of the sewage tank according to an embodiment of the present invention;

[0052] Figure 2 FIG. shows Figure 1 the cross-sectional view taken along the line A-A of the illustrated embodiment;

[0053] Figure 3 FIG. shows Figure 1 the cross-sectional view taken along the line B-B of the illustrated embodiment;

[0054] Figure 4 FIG. shows one of the schematic structural diagrams of the upper cover assembly according to an embodiment of the present invention;

[0055] Figure 5 FIG. shows another schematic structural diagram of the sewage tank according to an embodiment of the present invention;

[0056] Figure 6 FIG. shows another schematic structural diagram of the upper cover assembly according to an embodiment of the present invention;

[0057] Figure 7 FIG. shows yet another schematic structural diagram of the sewage tank according to an embodiment of the present invention;

[0058] Figure 8 FIG. shows still another schematic structural diagram of the sewage tank according to an embodiment of the present invention;

[0059] Figure 9 FIG. shows yet another schematic structural diagram of the sewage tank according to an embodiment of the present invention;

[0060] Figure 10 FIG. shows Figure 9 a partial schematic structural diagram at C of the illustrated embodiment;

[0061] Figure 11 FIG. shows another schematic structural diagram of the upper cover assembly according to an embodiment of the present invention;

[0062] Figure 12 The sixth structural schematic diagram of the sewage tank according to an embodiment of the present invention is shown;

[0063] Figure 13 The seventh structural schematic diagram of the sewage tank according to an embodiment of the present invention is shown;

[0064] Figure 14 The eighth structural schematic diagram of the sewage tank according to an embodiment of the present invention is shown;

[0065] Figure 15 The first structural schematic diagram of the cleaning device according to an embodiment of the present invention is shown;

[0066] Figure 16 Shown is Figure 15 The partial structural schematic diagram at D of the shown embodiment;

[0067] Figure 17 Shown is Figure 15 The partial structural schematic diagram at E of the shown embodiment;

[0068] Figure 18 The second structural schematic diagram of the cleaning device according to an embodiment of the present invention is shown.

[0069] Among them, Figures 1 to 18 The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0070] 1 sewage tank, 10 box body, 100 water inlet channel, 101 accommodation cavity, 102 air outlet, 103 extension part, 1030 mounting plate, 1032 first baffle, 1034 second baffle, 1036 mounting groove, 1038 third baffle, 1039 gas channel, 104 gas-liquid separation area, 105 first outlet end, 106 second outlet end, 1070 water discharge channel, 108 upper cover assembly, 1080 first sealing rubber, 1081 second sealing rubber, 1082 third sealing rubber, 109 taking part, 11 ultrasonic detection part, 110 support, 112 channel, 114 ultrasonic sensor, 116 second seal, 117 transmitting end, 118 receiving end, 12 first electrode part, 13 second electrode part, 14 signal connection part, 140 first docking port, 15 first seal, 16 anti-sway baffle, 17 filter element, 2 main body, 20 second docking port, 22 third docking port, 24 air inlet, 26 air outlet, 28 water outlet, 3 blower, 4 floor brush, 5 clean water tank. Detailed implementation manners

[0071] In order to be able to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0072] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0073] Reference is hereinafter made Figures 1 to 18 to a sewage tank 1 and a cleaning device according to some embodiments of the present invention.

[0074] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, according to an embodiment of the present invention, a sewage tank 1 is provided, including: a tank body 10, an ultrasonic detection member 11, a first electrode member 12, and a second electrode member 13.

[0075] Specifically, an inlet passage 100 and a receiving cavity 101 are provided in the tank body 10. The tank body 10 is provided with an air outlet 102. The receiving cavity 101 communicates with the inlet passage 100 and the air outlet 102. The ultrasonic detection member 11 is located at a first alarm liquid level in the receiving cavity 101 for detecting the liquid level in the receiving cavity 101. The first electrode member 12 and the second electrode member 13. The first electrode member 12 is located at a second alarm liquid level in the receiving cavity 101. The liquid level value of the second alarm liquid level is greater than the liquid level value of the first alarm liquid level. The second electrode member 13 is provided in the receiving cavity 101 and is spaced apart from the first electrode member 12. The first electrode member 12 and the second electrode member 13 can be conducted by the medium in the receiving cavity 101 to form a loop.

[0076] The sewage tank 1 provided by the present invention includes a tank body 10, an ultrasonic detection member 11, a first electrode member 12, and a second electrode member 13. An inlet channel 100 and a receiving cavity 101 are arranged in the tank body 10, and an air outlet 102 is arranged on the tank body 10. The sewage on the ground to be cleaned enters the receiving cavity 101 through the inlet channel 100 along with the air flow, and the air flow is discharged from the tank body 10 through the air outlet 102. Among them, the ultrasonic detection member 11 is arranged in the receiving cavity 101 to detect the liquid level in the receiving cavity 101 and provide a water-full alarm function. The detection principle of the ultrasonic detection member 11 is not affected by conductive media, so false alarms will not occur, which improves the accuracy of the ultrasonic detection member 11 in detecting the liquid level and reduces the frequency of users pouring water. The first electrode member 12 and the second electrode member 13 are arranged in the receiving cavity 101 at intervals. Moreover, the ultrasonic detection member 11 is arranged at the first alarm liquid level, the first electrode member 12 is arranged at the second alarm liquid level, and the liquid level value of the second alarm liquid level is greater than the liquid level value of the first alarm liquid level, that is, the first electrode member 12 is arranged at a position with a higher liquid level after the ultrasonic detection member 11. In this way, in an environment with foam, when the ultrasonic detection member 11 cannot contact the sewage liquid surface and the foam has begun to float up with the air flow, the first electrode member 12 and the second electrode member 13 will conduct after the foam rises to the second alarm liquid level, and the first electrode member 12 and the second electrode member 13 provide a water-full alarm function. The sewage tank 1 proposed in this application realizes the alarm function of the sewage tank 1 through the combined action of the ultrasonic detection member 11, the first electrode member 12, and the second electrode member 13, avoids false alarms, and can also give an alarm in time in the presence of foam to prevent sewage from spraying out through the air outlet 102.

[0077] It should be noted that the ultrasonic detection member 11 uses the principle that the sound speed is different in air and in water to identify the liquid level. When the liquid level submerges the transmitting end 117 and the receiving end 118 of the ultrasonic detection member 11, due to the change in the sound speed of ultrasonic waves in the liquid, it is recognized that the liquid level reaches the designed volume.

[0078] It can be understood that the sewage tank 1 is used for a cleaning device. The cleaning device includes a fan 3. The fan 3 creates a negative pressure in the receiving cavity 101 through the air outlet 102. Then, under the action of the negative pressure, the sewage on the ground enters the inlet channel 100 along with the air flow, and then the sewage enters the receiving cavity 101, and the air flow is discharged from the air outlet 102.

[0079] Optionally, the liquid level at the position where the second electrode member 13 is located is lower than the liquid level value at the position where the first electrode member 12 is located (for example, the liquid level value of the second alarm liquid level). In this way, when the foam floats up, the second electrode member 13 can contact the foam first, and the first electrode member 12 and the second electrode member 13 will be conducted when the foam contacts the first electrode member 12. Or, the liquid level value at the position where the second electrode member 13 is located is the same as the liquid level value at the position where the first electrode member 12 is located.

[0080] Optionally, the specific positions of the first alarm liquid level and the second alarm liquid level can be set according to actual conditions. Specifically, the first alarm liquid level is set near the design volume, and the second alarm liquid level is higher than the first alarm liquid level.

[0081] Optionally, the accommodating chamber 101 surrounds a portion of the circumference of the water inlet channel 100 .

[0082] like Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, optionally, the box body 10 also includes: an upper cover assembly 108 installed at the upper end of the box body 10, the upper cover assembly 108 includes an extension portion 103 extending toward the accommodating cavity 101, and the ultrasonic detection component 11 and the first electrode component 12 are installed in the extension portion 103.

[0083] In this embodiment, the box body 10 also includes an upper cover assembly 108, which is installed at the upper end of the box body 10, and an extension portion 103 is provided on the upper cover assembly 108 to provide an installation position for the ultrasonic detection component 11 and the first electrode component 12, so that the ultrasonic detection component 11 and the first electrode component 12 extend into the accommodating cavity 101, so as to facilitate the detection of the liquid level in the accommodating cavity 101.

[0084] Among them, the ultrasonic detection component 11 is arranged on the side of the extension part 103 away from the water inlet channel 100, so as to prevent a large amount of sewage sucked in the water inlet channel 100 from directly flowing through the transmitting end 117 and the receiving end 118 of the ultrasonic detection component 11, so that the detection area of ​​the ultrasonic detection component 11 is the large amount of sewage stored in the accommodating cavity 101, rather than the sewage that has just been sucked in and has not yet dripped, thereby eliminating the problem of false alarm when a large amount of sewage on the ground is sucked in a short time.

[0085] like Figure 2 , Figure 5 and Figure 9 As shown, according to one embodiment of the present invention, optionally, the extension portion 103 and the inner wall surface of the accommodating chamber 101 enclose an air-water separation zone 104, the air outlet 102 is located outside the air-water separation zone 104, the air-water separation zone 104 includes a first outlet end 105, the first outlet end 105 is connected to the accommodating chamber 101, and is connected to the air outlet 102 through the accommodating chamber 101; the water inlet channel 100 includes a second outlet end 106, and the second outlet end 106 extends from the first outlet end 105 into the air-water separation zone 104.

[0086] In this embodiment, the extension portion 103 and the inner wall surface of the accommodation cavity 101 enclose a gas-liquid separation area 104. The gas-liquid separation area 104 includes a first outlet end 105, and the water inlet channel 100 includes a second outlet end 106. The second outlet end 106 of the water inlet channel 100 extends into the gas-liquid separation area 104, such that the gas-liquid separation area 104 surrounds the second outlet end 106. After the sewage enters the water inlet channel 100, it enters the gas-liquid separation area 104 from the second outlet end 106, and then flows into the accommodation cavity 101 from the first outlet end 105 of the gas-liquid separation area 104; the gas outlet 102 is located outside the gas-liquid separation area 104. After the gas enters the gas-liquid separation area 104 from the water inlet channel 100, it flows from the first outlet end 105 to the gas outlet 102, achieving the separation of gas and liquid. At the same time, by arranging the gas-liquid separation area 104 to surround the second outlet end 106, it can also prevent the sewage in the water inlet channel 100 from directly flowing to the ultrasonic detection member 11 and the first electrode member 12, avoiding false alarms in the sewage tank 1.

[0087] As Figure 3 , Figure 4 and Figure 6 shown, according to an embodiment of the present invention, optionally, the extension portion 103 includes: a mounting plate 1030, a part of the mounting plate 1030 is disposed opposite to the second outlet end 106, and the other part extends into the accommodation cavity 101. The ultrasonic detection member 11 is disposed on the part of the mounting plate 1030 that extends into the accommodation cavity 101 and is located on the side of the mounting plate 1030 away from the water inlet channel 100; a first baffle 1032 is disposed on the first side of the mounting plate 1030 and is connected to the inner wall surface of the accommodation cavity 101; a second baffle 1034 is disposed on the second side of the mounting plate 1030 and is connected to the inner wall surface of the accommodation cavity 101. The first baffle 1032, the second baffle 1034, the mounting plate 1030 and the inner wall surface of the accommodation cavity 101 enclose the gas-liquid separation area 104.

[0088] In this embodiment, the extension part 103 includes a mounting plate 1030, a first baffle 1032 and a second baffle 1034. A part of the mounting plate 1030 is disposed opposite to the second outlet end 106, blocking the liquid in the water inlet channel 100 to prevent sewage from entering the air outlet 102 along with the airflow. Another part of the mounting plate 1030 extends into the accommodation cavity 101. The first baffle 1032 and the second baffle 1034 are respectively disposed on the first side and the second side of the mounting plate 1030 and are respectively connected to the inner wall surface of the accommodation cavity 101. Thus, the mounting plate 1030, the first baffle 1032, the second baffle 1034 and the inner wall surface of the accommodation cavity 101 enclose an air-water separation area 104 to achieve the separation of sewage and airflow. At the same time, the ultrasonic detection member 11 is disposed on the part of the mounting plate 1030 extending into the accommodation cavity 101 and on the side of the mounting plate 1030 facing away from the water inlet channel 100, which can prevent the sewage inhaled in the water inlet channel 100 from directly flowing between the receiving end 118 and the transmitting end 117 of the ultrasonic detection member 11, ensuring the accuracy of the liquid level detection by the ultrasonic detection member 11.

[0089] It should be noted that the first side and the second side of the mounting plate 1030 are opposite sides of the mounting plate 1030.

[0090] It can be understood that the ultrasonic detection member 11 includes a transmitting end 117 and a receiving end 118.

[0091] As Figure 3 shown, according to an embodiment of the present invention, optionally, a mounting groove 1036 is provided on the side of the mounting plate 1030 facing away from the water inlet channel 100, and the ultrasonic detection member 11 is disposed in the mounting groove 1036.

[0092] In this embodiment, a mounting groove 1036 is provided on the side of the mounting plate 1030 facing away from the water inlet channel 100. By disposing the ultrasonic detection member 11 in the mounting groove 1036, the installation of the ultrasonic detection member 11 is realized. At the same time, the space occupied by the mounting plate 1030 and the ultrasonic detection member 11 as a whole is reduced, and the design volume in the accommodation cavity 101 is increased.

[0093] As Figure 4 and Figure 6 shown, according to an embodiment of the present invention, optionally, the extension part 103 further includes: at least one third baffle 1038. At least one third baffle 1038 is disposed on the side of the first baffle 1032 facing away from the second baffle 1034, and the first electrode member 12 is disposed on the third baffle 1038, located between the first outlet end 105 and the air outlet 102.

[0094] In this embodiment, the extension portion 103 further includes at least one third baffle 1038. The at least one third baffle 1038 is disposed on the side of the first baffle 1032 away from the second baffle 1034, such that the third baffle 1038 is located outside the gas-water separation area 104. By arranging the first electrode member 12 on the third baffle 1038, sewage splashing onto the first electrode member 12 can be avoided.

[0095] Optionally, the first electrode member 12 is disposed on the side of the third baffle 1038 away from the ultrasonic detection member 11, and the first electrode member 12 is located between the first outlet end 105 and the air outlet 102. When the foam in the accommodation cavity 101 floats upward with the airflow, the foam connects the first electrode member 12 and the second electrode member 13, sending out an alarm message.

[0096] According to an embodiment of the present invention, optionally, the third baffle 1038 is connected to the inner wall surface of the accommodation cavity 101. The at least one third baffle 1038, the first baffle 1032, and the inner wall surface of the accommodation cavity 101 enclose a gas passage 1039. The first electrode member 12 is located in the gas passage 1039, and the air outlet 102 is in communication with the gas passage 1039.

[0097] In this embodiment, the third baffle 1038 is connected to the inner wall surface of the accommodation cavity 101 and, together with the first baffle 1032 and the inner wall surface of the accommodation cavity 101, encloses a gas passage 1039, such that the first electrode member 12 is located in a relatively dry area, which can avoid sewage splashing onto the first electrode member 12 and can also make the gas discharged from the sewage tank 1 relatively dry.

[0098] As Figure 4 and Figure 6 shown, according to an embodiment of the present invention, optionally, when the number of the third baffles 1038 is at least two, the at least two third baffles 1038 are respectively disposed on the side of the second baffle 1034 away from the first baffle 1032 and on the side of the first baffle 1032 away from the second baffle 1034; the number of the first electrode members 12 is at least two, and the first electrode member 12 is provided on any one of the third baffles 1038; or the first electrode member 12 and the second electrode member 13 are respectively disposed on at least two third baffles 1038.

[0099] In this embodiment, at least two third baffles 1038 are provided on the side of the second baffle 1034 facing away from the first baffle 1032 and on the side of the first baffle 1032 facing away from the second baffle 1034. Correspondingly, the first electrode members 12 can be respectively provided on at least two third baffles 1038. Thus, when the sewage tank 1 tilts left and right (for example, tilts towards the first side of the extension portion 103 or towards the second side of the extension portion 103), detection can also be respectively performed through the first electrode members 12 on the left and right sides, avoiding the situation where the alarm is not timely when the inclination angle is too large. The first electrode members 12 and the second electrode members 13 can also be respectively provided on at least two third baffles 1038, and an alarm reminder is given when the foam contacts both the first electrode members 12 and the second electrode members 13 at the same time.

[0100] It can be understood that the third baffle 1038 on the side of the second baffle 1034 facing away from the first baffle 1032, the second baffle 1034, and the inner wall surface of the accommodation cavity 101 enclose a gas passage 1039; the third baffle 1038 on the side of the first baffle 1032 facing away from the second baffle 1034, the first baffle 1032, and the inner wall surface of the accommodation cavity 101 enclose a gas passage 1039.

[0101] Optionally, the first baffle 1032 is connected to the accommodation cavity 101 through a first sealing rubber 1080, and the second baffle 1034 is connected to the inner wall surface of the accommodation cavity 101 through a second sealing rubber 1081. The third baffle 1038 extends to the side wall of the accommodation cavity 101 and is sealed with the side wall of the accommodation cavity 101 through a third sealing rubber 1082.

[0102] As Figure 2 shown, according to an embodiment of the present invention, optionally, the second electrode member 13 is provided at the bottom of the accommodation cavity 101.

[0103] In this embodiment, the second electrode member 13 is provided at the bottom of the accommodation cavity 101, so that when there is liquid stored in the accommodation cavity 101, the second electrode member 13 is always immersed in the liquid, and the first electrode member 12 is at a higher liquid level. When the foam contacts the first electrode member 12, the first electrode member 12 and the second electrode member 13 are conducted.

[0104] It can be understood that the bottom of the accommodation cavity 101 is the side opposite to the air outlet 102 of the accommodation cavity 101.

[0105] As Figure 7 and Figure 8 shown, according to an embodiment of the present invention, optionally, the upper cover assembly 108 is provided with an air outlet 102, and the air outlet 102 is located on both sides of the extension portion 103.

[0106] In this embodiment, an air outlet 102 is provided on the upper cover assembly 108. The air outlet 102 is disposed on both sides of the extension portion 103, such that the extension portion 103 is arranged to avoid the air outlet 102, increasing the area of the air outlet 102 to ensure the smooth discharge of the air flow.

[0107] Optionally, the upper cover assembly 108 is detachably connected to the box body 10.

[0108] Optionally, a sealing structure is provided between the upper cover assembly 108 and the box body 10.

[0109] Optionally, the air outlet 102 is disposed on the side of the upper cover assembly 108 opposite to the bottom wall of the accommodation cavity 101.

[0110] Such as Figure 8 、 Figure 9 、 Figure 10 And Figure 11 As shown in

[0111] According to an embodiment of the present invention, optionally, the sewage tank 1 further includes: a signal connection portion 14 disposed inside the upper cover assembly 108. The signal connection portion 14 is provided with a first pair of interfaces 140, and the first pair of interfaces 140 are exposed on the side of the upper cover assembly 108 away from the box body 10. The ultrasonic detection member 11 is electrically connected to the signal connection portion 14; a first sealing member 15 disposed between the signal connection portion 14 and the upper cover assembly 108.

[0112] Such as Figure 2 And Figure 10 As shown in

[0113] In this embodiment, the ultrasonic detection member 11 includes an ultrasonic sensor 114 and a bracket 110 for mounting the ultrasonic sensor 114. The bracket 110 is disposed on the extension portion 103 and extends into the upper cover assembly 108. Among them, a channel 112 is provided on the bracket 110, and the ultrasonic sensor 114 is electrically connected to the signal connection portion 14 through the channel 112, preventing the ultrasonic sensor 114 from leaking electricity and improving the safety performance of the sewage tank 1.

[0114] As Figure 10 shown, according to an embodiment of the present invention, optionally, a second seal 116 is provided between one end of the bracket 110 extending into the upper cover assembly 108 and the upper cover assembly 108.

[0115] In this embodiment, a second seal 116 is provided between one end of the bracket 110 extending into the upper cover assembly 108 and the upper cover assembly 108. That is to say, a primary seal is provided between the bracket 110 and the upper cover assembly 108, and another primary seal is provided between the signal connection portion 14 and the upper cover assembly 108, improving the sealing performance of the accommodation cavity 101.

[0116] In a specific application, a wiring cavity is provided on the upper cover assembly 108. One end of the bracket 110 away from the ultrasonic sensor 114 extends into the wiring cavity, enabling the connection wire of the ultrasonic sensor 114 to extend to the wiring cavity through the channel 112 and then be electrically connected to the signal connection portion 14 through the wiring cavity.

[0117] As Figure 7 shown, according to an embodiment of the present invention, optionally, the box body 10 further includes a water drainage channel 1070, and the water drainage channel 1070 is provided at the bottom of the accommodation cavity 101.

[0118] In this embodiment, a water drainage channel 1070 is further provided at the bottom of the box body 10, and the water drainage channel 1070 is provided at the bottom of the accommodation cavity 101 to facilitate the discharge of the sewage in the accommodation cavity 101.

[0119] It can be understood that a valve body is provided on the water drainage channel 1070, and the valve body is used to open or close the water drainage channel 1070.

[0120] As Figure 2 shown, according to an embodiment of the present invention, optionally, the sewage tank 1 further includes: an anti-slosh baffle 16, disposed in the accommodation cavity 101; and / or a filter member 17, disposed at the air outlet 102.

[0121] In this embodiment, the sewage tank 1 further includes an anti-slosh baffle 16, and the anti-slosh baffle 16 is disposed in the accommodation cavity 101, which can prevent sewage from entering the air outlet 102 when the inclination angle of the sewage tank 1 is too large. The filter member 17 is disposed at the air outlet 102 to filter the airflow, preventing the airflow from carrying foam or sewage out of the air outlet 102 and improving the dryness of the airflow.

[0122] According to an embodiment of the present invention, optionally, a taking part 109 is provided on the outer surface of the box body 10.

[0123] In this embodiment, a taking part 109 is provided on the outer surface of the box body 10, so as to facilitate the user to take the sewage tank 1, and further facilitate the disassembly and installation of the sewage tank 1.

[0124] According to an embodiment of the present invention, optionally, the taking part 109 includes a groove or a protrusion.

[0125] In this embodiment, the taking part 109 includes a groove or a protrusion. Of course, it can also be other structures to facilitate the user to take it by hand.

[0126] According to an embodiment of the present invention, a cleaning device is further proposed, including: the sewage tank 1 proposed in any of the above embodiments.

[0127] The cleaning device provided by the present invention includes the sewage tank 1 proposed in any of the above embodiments, and thus has all the beneficial effects of the sewage tank 1.

[0128] Such as Figure 15 、 Figure 16 、 Figure 17 and Figure 18 As shown, according to an embodiment of the present invention, optionally, the cleaning device further includes: a main body 2, the sewage tank 1 is arranged on the main body 2, and an air inlet 24 and an air outlet 26 are provided on the main body 2; a fan 3, arranged on the main body 2, the fan 3 is communicated with the air outlet 102 through the air inlet 24, and the fan 3 is communicated with the air outlet 26.

[0129] In this embodiment, the cleaning device further includes a main body 2 and a fan 3. The sewage tank 1 is arranged on the main body 2, and the fan 3 is arranged on the main body 2 and is communicated with the air outlet 102 through the air inlet 24. When the fan 3 is turned on, a negative pressure can be formed in the box body 10 through the air inlet 24 and the air outlet 102, so that the sewage enters the accommodating cavity 101 through the water inlet channel 100.

[0130] Optionally, the sewage tank 1 is detachably arranged on the main body 2.

[0131] Such as Figure 17 As shown, according to an embodiment of the present invention, optionally, the main body 2 is provided with: a second pair of interfaces 20, and the second electrode member 13 can be electrically connected to the second pair of interfaces 20; a third pair of interfaces 22, which can be connected to the first pair of interfaces 140 of the sewage tank 1.

[0132] In this embodiment, a second pair of interfaces 20 and a third pair of interfaces 22 are provided on the main body 2. The second electrode member 13 can be electrically connected to the second pair of interfaces 20 to achieve power connection of the second electrode member 13; the third pair of interfaces 22 can be connected to the first pair of interfaces 140 of the sewage tank 1 to achieve power connection of the ultrasonic detection member 11 and the first electrode member 12.

[0133] Optionally, a water outlet 28 is further provided on the main body 2, and the water outlet 28 can be communicated with the water discharge channel 1070 of the sewage tank 1.

[0134] It should be noted that the cleaning device includes a floor washer. Optionally, the floor washer further includes a floor brush 4 and a clean water tank 5.

[0135] Specifically, during the cleaning process, the floor washer sprays clean water on the ground and wipes the ground dirt clean through the roller. At this time, the clean water becomes sewage. Under the suction force generated by the blower 3 of the floor washer, the sewage on the ground is sucked into the sewage tank 1, and gas-water separation is completed in the sewage tank 1. The sewage deposits inside the sewage tank 1, and the dry air flow further flows through the blower 3 and is discharged outside the floor washer. In order to prevent the problem that the sewage in the sewage tank 1 is sucked into the blower 3 by the air flow and then ejected due to the excessive amount of sewage in the sewage tank 1, a liquid level detection and alarm system (such as the ultrasonic detection member 11, the first electrode member 12, and the second electrode member 13) needs to be provided in the sewage tank 1. When the volume of the sewage tank 1 reaches the designed volume, the liquid level alarm is triggered and the operation of the blower 3 is stopped to prevent sewage overflow.

[0136] In specific applications, the present application proposes a combined floor washer liquid level detection scheme. This scheme mainly combines ultrasonic liquid level sensors (such as the ultrasonic detection member 11) with electrode liquid level detection (such as the first electrode member 12 and the second electrode member 13) for liquid level detection.

[0137] Electrode liquid level detection uses two non-connected metal sheets inserted into the sewage tank 1 to detect the water full signal. When the sewage level rises to the height of the metal sheets, the sewage conducts the two metal sheets, and whether the water is full can be judged by measuring the resistance between the two metal sheets.

[0138] The ultrasonic liquid level detection scheme uses the principle that the sound speed is different in air and water to identify the liquid level. When the liquid level submerges the transmitting end 117 and the receiving end 118 of the sensor, due to the change in the sound speed in the liquid, the liquid level reaching the designed volume is recognized. However, the ultrasonic liquid level sensor cannot detect foam, and the signal shows basically no difference in air and foam. Therefore, the two schemes are combined for liquid level detection.

[0139] 1. Arrange the ultrasonic liquid level sensor near the designed full water level (such as the designed volume). Since its detection principle is not affected by the resistance of the conductive medium, it will not generate false alarms.

[0140] 2. Arrange the electrode sensor (such as the first electrode member 12) at a position with a higher alarm liquid level behind the ultrasonic liquid level sensor, which does not function in a foam-free environment, and the ultrasonic module provides the water full alarm function. In a foamy environment, due to the thick foam layer, when the ultrasonic liquid level sensor cannot contact the sewage liquid surface and the foam has begun to float upward with the airflow, in the case where the foam connects the first electrode member 12 and the second electrode member 13, the electrode sensor provides the water full alarm function. At the same time, it can remind consumers to pay attention to cleaning the foam, and can also avoid the problem in the related technology that when the electrode sensor is set at the designed water level, the electrode contacts the foam and alarms prematurely, resulting in too little water stored in the sewage tank 1 and a significant increase in the pouring frequency.

[0141] 3. This solution does not have problems such as large volume, increased noise, and the need for movement.

[0142] Specifically, a combined liquid level detection system is installed in the sewage tank 1, including electrode liquid level detection and ultrasonic liquid level detection. The electrode A (such as the second electrode member 13) and the electrode B (such as the first electrode member 12) are combined for liquid level detection. When the sewage in the sewage tank 1 conducts the electrode plates at these two positions simultaneously, the water full alarm is triggered. The electrode A is set at the bottom of the sewage tank 1 and is always immersed in the sewage, while the electrode B is set at a position higher than the designed volume liquid level of the sewage tank 1 and will not be wetted by the sewage during normal use.

[0143] The ultrasonic liquid level sensor is set at the designed volume liquid level of the sewage tank 1. The ultrasonic liquid level sensor includes a transmitting end 117 and a receiving end 118, and judges whether it is immersed in the liquid by detecting the sound speed between the two.

[0144] The advantages are as follows:

[0145] (1) See the Figure 12 、 Figure 13 and Figure 14 for the working process. In most cases, as the sewage in the sewage tank 1 increases and the water level gradually rises, when there is no significant foam on the liquid surface in the sewage tank 1, compared with the solution with only electrode plates, this application will not be affected by the resistance of various dirty conductive media (vinegar, soy sauce, etc.).

[0146] (2) Because the ultrasonic liquid level sensor cannot detect the foam, as Figure 14 shows, when there is a thick layer of foam on the liquid surface in the sewage tank 1 and the height of the foam liquid surface is relatively high, the foam is easily carried by the airflow towards the air outlet 26. The sewage liquid surface at the bottom of the foam has not immersed the ultrasonic liquid level sensor, and at this time, the sewage tank 1 will not stop for protection. When the foam continues to move up to the electrode B and conducts with the electrode A at the bottom of the sewage tank 1, the stop protection is triggered.

[0147] (3) After the combination of the electrode and the ultrasonic wave, it can simultaneously solve the problems of false alarms of the electrode sensor under the influence of low-resistance sewage and false alarms of the ultrasonic liquid level sensor for foam leakage.

[0148] (4) If you want to use the ultrasonic liquid level sensor alone to detect the full water level in the presence of foam, you need to move the arrangement position of the ultrasonic liquid level sensor downward by a large amount so that it can contact the sewage surface earlier, which will cause the volume of the sewage tank 1 to decrease significantly. Depending on the flow rate and foam height in the sewage tank 1, the volume reduction may be between 15% and 30%; when using the electrode alone to detect the liquid level, false alarms may occur after a long time of use, and the alarm will stop when sucking sewage at the beginning, resulting in the complete inability to use the floor washer.

[0149] Optionally, the form and angle of gas-liquid separation can be different; the ultrasonic liquid level sensor is not limited to being arranged in the middle of the sewage tank 1 and can be arranged on one side of the sewage tank 1. Electrode A is not limited to being arranged at the bottom of the sewage tank 1 and can be symmetrically arranged with electrode B or at other higher positions as long as the electrode can be conducted during use; electrode B is not limited to being arranged on the baffle and can extend from other positions; the ultrasonic liquid level sensor and the electrode liquid level sensor are combined for liquid level detection, and the trigger liquid level height / volume of the electrode liquid level detection should be higher than that of the electrode liquid level sensor; the ultrasonic liquid level sensor should be structurally blocked from the sewage flowing out of the water inlet pipe (such as the water inlet channel 100) to prevent a large amount of sewage sucked from the water inlet pipe from directly flowing between the transmitting end 117 and the receiving end 118 of the ultrasonic liquid level sensor, so that the detection area of the ultrasonic liquid level sensor can only detect the large amount of sewage stored in the sewage tank 1 rather than the sewage that has just been sucked in and has not yet dripped, thus eliminating the problem of false alarms when sucking a large amount of sewage from the ground in a short time.

[0150] In the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0151] In the description of this specification, the descriptions of terms such as "an embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0152] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sewage tank, characterized in that, include: A box body, wherein a water inlet channel and a receiving chamber are provided in the box body, an air outlet is provided in the box body, and the receiving chamber is communicated with the water inlet channel and the air outlet; An ultrasonic detection member, located at a first alarm liquid level in the accommodating chamber, for detecting the liquid level in the accommodating chamber; A first electrode member and a second electrode member, the first electrode member is located at a second alarm liquid level in the accommodating chamber, the liquid level value of the second alarm liquid level is greater than the liquid level value of the first alarm liquid level, the second electrode member is arranged in the accommodating chamber and is spaced apart from the first electrode member, the first electrode member and the second electrode member can be conducted by the medium in the accommodating chamber to form a circuit.

2. The sewage tank according to claim 1, wherein Also includes: An upper cover assembly is installed at the upper end of the box body, and the upper cover assembly includes an extension portion extending toward the accommodating cavity, and the ultrasonic detection component and the first electrode component are installed on the extension portion.

3. The sewage tank according to claim 2, characterized in that The extension portion and the inner wall surface of the accommodating cavity enclose an air-water separation zone, the air outlet is located outside the air-water separation zone, the air-water separation zone includes a first outlet end, the first outlet end is communicated with the accommodating cavity, and is communicated with the air outlet through the accommodating cavity; The water inlet channel comprises a second outlet end, and the second outlet end extends from the first outlet end into the gas-water separation zone.

4. The sewage tank according to claim 3, characterized in that The extension portion comprises: a mounting plate, a portion of which is arranged opposite to the second outlet end, and another portion of which extends into the accommodating cavity, wherein the ultrasonic detection element is arranged at the portion of the mounting plate extending into the accommodating cavity and is located at a side of the mounting plate away from the water inlet channel; A first baffle, disposed on a first side of the mounting plate and connected to an inner wall surface of the accommodating cavity; The second baffle is arranged on the second side of the mounting plate and connected to the inner wall surface of the accommodating cavity. The first baffle, the second baffle, the mounting plate and the inner wall surface of the accommodating cavity enclose the gas-water separation area.

5. The sewage tank according to claim 4, characterized in that, A mounting groove is provided on one side of the mounting plate away from the water inlet channel, and the ultrasonic detection component is arranged in the mounting groove.

6. The sewage tank according to claim 4, characterized in that The extension portion further comprises: At least one third baffle is provided on a side of the first baffle away from the second baffle, and the first electrode member is provided on the third baffle and located between the first outlet end and the gas outlet.

7. The sewage tank according to claim 6, characterized in that, The third baffle is connected to the inner wall surface of the accommodating chamber, at least one of the third baffles, the first baffle and the inner wall surface of the accommodating chamber enclose a gas channel, the first electrode member is located in the gas channel, and the gas outlet is connected to the gas channel.

8. The sewage tank according to claim 7, characterized in that, When the number of the third baffles is at least two, the at least two third baffles are respectively arranged on a side of the second baffle facing away from the first baffle, and a side of the first baffle facing away from the second baffle; The number of the first electrode members is at least two, and the first electrode member is disposed on any of the third baffles; or the first electrode member and the second electrode member are respectively disposed on at least two of the third baffles.

9. The sewage tank according to any one of claims 2 to 8, characterized in that, The second electrode member is arranged at the bottom of the accommodating cavity.

10. The sewage tank according to any one of claims 2 to 8, characterized in that: The upper cover assembly is provided with the air outlet, and the air outlet is located on both sides of the extension part.

11. The sewage tank according to any one of claims 2 to 8, characterized in that, It further includes: A signal connection part, which is arranged inside the upper cover assembly. The signal connection part is provided with a first pair of interfaces, and the first pair of interfaces are exposed on the side of the upper cover assembly away from the box body. The ultrasonic detection part is electrically connected to the signal connection part; A first seal, which is arranged between the signal connection part and the upper cover assembly.

12. The sewage tank according to claim 11, wherein, The ultrasonic detection part includes: A bracket, which is arranged on the extension part. One end of the bracket extends into the upper cover assembly, and a channel is arranged inside the bracket; An ultrasonic sensor, which is arranged on the bracket. The ultrasonic sensor is electrically connected to the signal connection part through the channel.

13. The sewage tank according to claim 12, characterized in that, A second seal is arranged between the end of the bracket extending into the upper cover assembly and the upper cover assembly.

14. The sewage tank according to claim 10, characterized in that, The box body further includes a water discharge channel, and the water discharge channel is arranged at the bottom of the accommodation cavity.

15. The sewage tank according to any one of claims 1 to 8, characterized in that, It further includes: An anti-slosh baffle, which is arranged inside the accommodation cavity; and / or A filter element, which is arranged at the air outlet.

16. The sewage tank according to any one of claims 1 to 8, characterized in that, A taking part is arranged on the outer surface of the box body.

17. The sewage tank according to claim 16, wherein The taking part includes a groove or a protrusion.

18. A cleaning device, characterized in that, It includes: The sewage tank according to any one of claims 1 to 17.

19. The cleaning device according to claim 18, wherein, It further includes: A main body, the sewage tank is arranged on the main body, and an air inlet and an air outlet are arranged on the main body; A fan, which is arranged on the main body. The fan is communicated with the air outlet through the air inlet, and the fan is communicated with the air outlet.

20. The cleaning device according to claim 19, characterized in that, The following are arranged on the main body: A second pair of interfaces, and the second electrode part can be electrically connected to the second pair of interfaces; A third pair of interfaces, which can be connected to the first pair of interfaces of the sewage tank.

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