Waste water tank cover assembly, waste water tank, cleaning system, cleaning device, and control method therefor

Abstract

The present invention belongs to the technical field of household appliances, and particularly relates to a waste water tank cover assembly, a waste water tank, a cleaning device, and a control method therefor. The waste water tank cover assembly comprises a cover body, a first electrode, and a second electrode. The cover body is provided with an air outlet part, the air outlet part being connected an the air guide component. The first electrode and the second electrode are separately connected to the cover body, the first electrode being provided with a first trigger part, and the second electrode being provided with a second trigger part. When the first trigger part and the second trigger part are connected by water in the waste water tank, a trigger signal is generated, so that, on the basis of a corresponding trigger signal, the cleaning device can adjust operation parameters of the air guide component.

Description

Sewage tank cover assembly, sewage tank, cleaning system, cleaning device and control method thereof Cross-reference to related applications This application claims the priority of Chinese Patent Application No. 202311871140.1 filed on December 29, 2023, and the entire content disclosed in the above Chinese patent application is incorporated herein by reference as part of this application. Technical Field This application belongs to the technical field of household appliances, and particularly relates to a sewage tank cover assembly, a sewage tank, a cleaning device and a control method thereof. Background Art In the related art, the sewage tank is an important component of cleaning devices (such as floor sweeping robots, floor washing machines), and its main functions are to collect, separate and store wet and dry garbage. Its working principle is as follows: The air guiding member extracts the air in the sewage tank from the air outlet, creating a negative pressure in the sewage tank, and sucking the sewage together with solid garbage into the sewage tank. In the process of implementing this application, the applicant found at least the following deficiencies in the related art: When the cleaning device is running, if the sewage tank is in an inclined posture, the water surface in the sewage tank is relatively close to the air guiding member, and water droplets may be generated on the water surface in the sewage tank. When the air guiding member is running, the water droplets may be sucked into the air guiding member, affecting the normal operation of the air guiding member. Summary of the Invention This application provides a sewage tank cover assembly, a sewage tank, a cleaning system, a cleaning device and a control method thereof, aiming to at least to some extent solve the technical problem that water droplets may be sucked into the air guiding member during the operation of the cleaning device, affecting the normal operation of the air guiding member. In the first aspect of this application, an embodiment of this application provides a sewage tank cover assembly for installation on the sewage tank of a cleaning device. There is an air guiding member on the cleaning device for creating a negative pressure in the sewage tank. The sewage tank cover assembly includes: a cover body provided with an air outlet portion, and the air outlet portion is connected to the air guiding member; a first electrode and a second electrode are respectively connected to the cover body. The first electrode has a first triggering portion, and the second electrode has a second triggering portion. Both the first triggering portion and the second triggering portion are arranged below the air outlet portion; it is used to generate a triggering signal when the first triggering portion and the second triggering portion are conducted by the water body in the sewage tank, so that the cleaning device adjusts the operating parameters of the air guiding member according to the corresponding triggering signal. In the embodiment of the present application, for the sewage tank cover assembly, when the water body in the sewage tank conducts the first trigger part and the second trigger part, the first trigger part and the second trigger part generate trigger signals, so that the cleaning device adjusts the operating parameters of the air guiding part according to the corresponding trigger signals, so as to reduce the operating power of the air guiding part when the sewage tank is in an inclined posture, thereby reducing the risk of water droplets generated on the water surface in the sewage tank being sucked into the air guiding part, enabling the air guiding part to operate normally, and having good practicability. When the cleaning device is in other postures, there is no water body between the first trigger part and the second trigger part, the first trigger part and the second trigger part are not conducted, and no trigger signal for adjusting the operating parameters of the air guiding part is generated, and the air guiding part resumes the normal set power value to enable the device to operate normally. In the second aspect of the present application, the embodiment of the present application further provides a sewage tank, where the sewage tank includes: a box body provided with an inlet and an outlet; the above-mentioned sewage tank cover assembly, and the cover body of the sewage tank cover assembly is detachably arranged in the inlet and outlet. The sewage tank provided by the embodiment of the present application can reduce the risk of water droplets generated on the water surface in the sewage tank being sucked into the air guiding part, enabling the air guiding part to operate normally, and having good practicability. In the third aspect of the present application, the embodiment of the present application further provides a cleaning device, and the cleaning device includes the above-mentioned sewage tank. The sewage tank provided by the present application can reduce the risk of water droplets generated on the water surface in the sewage tank being sucked into the air guiding part, enabling the air guiding part to operate normally, and having good practicability. In the fourth aspect of the present application, the embodiment of the present application further provides a cleaning system, where the cleaning system includes the above-mentioned cleaning device; and a base station configured to support the cleaning device.

[0013] In the fifth aspect of the present application, the embodiment of the present application further provides a control method for a cleaning device, where the cleaning device includes a sewage tank, and the sewage tank includes a box body and the above-mentioned sewage tank cover assembly. The control method includes: the water body in the sewage tank conducts the first trigger part and the second trigger part to output a first trigger signal; in response to the first trigger signal; according to the first trigger signal, control the operating power of the fan to be reduced to a preset power until the operating duration of the preset power reaches a preset duration. In the control method of the cleaning device provided by the embodiment of the present application, when the water body in the sewage tank conducts the first trigger part and the second trigger part, the operating power of the air guiding part is immediately controlled to be reduced to a preset power. During the preset time period when the air guiding part operates at the preset power, regardless of whether the first trigger part and the second trigger part are in a conducting state, the air guiding part still operates at this preset power, that is, the air guiding part has a delay function when operating at the preset power. Thus, under the condition that the sewage in the sewage tank sways under the action of inertia and the first trigger part and the second trigger part are not continuously in a conducting state, the air guiding part can also operate at the preset power, so as to reduce the risk of water droplets generated on the water surface in the sewage tank being sucked into the air guiding part, enabling the air guiding part to operate normally, which has good practicability. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. FIG. 1 shows a schematic structural diagram of a sewage tank in one or more embodiments of the present application; FIG. 2 shows a front view schematic diagram of FIG. 1; FIG. 3 shows a schematic logic control diagram of a cleaning device having the sewage tank shown in FIG. 1; FIG. 4 shows a schematic structural diagram of a sewage tank cover assembly in one or more embodiments of the present application; FIG. 5 shows a structural diagram of the first perspective of FIG. 4; FIG. 6 shows a structural diagram of the second perspective of FIG. 4; FIG. 7 shows a schematic diagram of water level detection of the sewage tank shown in FIG. 1 in a target posture; FIG. 8 shows a schematic structural diagram of the first electrode in FIG. 4; FIG. 9 shows a sectional view schematic diagram of FIG. 4; FIG. 10 shows a schematic structural diagram of the second electrode in FIG. 4; FIG. 11 shows a schematic diagram of water level detection of the sewage tank shown in FIG. 1 in a vertical posture; FIG. 12 shows a schematic diagram of water level detection of the sewage tank shown in FIG. 1 in an inclined posture; FIG. 13 shows a schematic structural diagram of the third electrode in FIG. 4; FIG. 14 shows a sectional view schematic diagram of FIG. 13; FIG. 15 shows a schematic structural diagram of the cover body in FIG. 4; FIG. 16 shows a schematic structural diagram of a water blocking part including a plurality of first inclined surfaces in one or more embodiments of the present application; Figure 17 shows a schematic structural view of a water retaining part including a plurality of first steps in one or more embodiments of the present application; Figure 18 shows a schematic structural view of another perspective of Figure 15; Figure 19 shows a schematic structural view of a water guiding part including a plurality of first inclined surfaces in one or more embodiments of the present application; Figure 20 shows a schematic structural view of a water guiding part including a plurality of first steps in one or more embodiments of the present application; Figure 21 shows a schematic structural view of the box body of the sewage tank in Figure 1. Explanation of reference numerals: Sewage tank cover assembly - a; Cover body - 1, air outlet part - 101, First electrode - 2, first trigger part - 201, first pole piece - 202, second pole piece - 203, process hole - 204; Second electrode - 3, second trigger part - 301, third pole piece - 302, fourth pole piece - 303, fifth pole piece - 304; First contact piece - 4; Second contact piece - 5; Separator - 6; Third electrode - 7, third trigger part - 701, fourth trigger part - 702, housing - 703, first pole column - 704, second pole column - 705, sixth pole piece - 706, seventh pole piece - 707, sealing groove - 708; Fourth electrode - 8, fifth trigger part - 801; Support - 9, groove body - 901, through hole - 902; Third contact piece - 10; Air outlet body - 11, air inlet - 1101, water retaining part - 1102, air outlet cavity - 1103, air inlet cavity - 1104, water guiding part - 1105, first bottom - 1106, second bottom - 1107; Air guiding member - 12; Air limiting member - 13; Support - 14; Handle - 15; Filter member - 16; Bracket - 17; Sealing member - 18 Sewage tank - b, box body - b1, inlet and outlet - b2; Controller - c; Air guiding member - d. Detailed implementation manners To enable those skilled in the art to which this application pertains to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by this application. With the development of the economy and the progress of society, people's requirements for the quality of life are getting higher and higher. Therefore, some intelligent appliances that can liberate people's hands have emerged as the times require, and cleaning equipment for home use has gradually entered people's lives. Taking the floor washer as an example of the cleaning equipment, the technical solutions of this application will be further described. A floor washer is a cleaning equipment suitable for cleaning the ground while sucking up sewage and taking the sewage away from the site, and has the advantages of environmental protection, energy saving, high efficiency, etc. The sewage tank is an important part of the floor washer, which is used for gas-liquid separation and collects the separated sewage in its own cavity. It is necessary to detect the amount of sewage stored in the sewage tank to determine whether the sewage tank needs to be cleaned. In the related art, when the floor washer is running, if the sewage tank is in an inclined posture, the water surface in the sewage tank is relatively close to the air guiding member, and water droplets may be generated on the water surface in the sewage tank. When the air guiding member is running, too many water droplets may be sucked into the air guiding member, affecting the normal operation of the air guiding member. Based on the above technical problems, this application provides a sewage tank cover assembly, a sewage tank and a cleaning equipment, aiming to at least to a certain extent solve the technical problem that too many water droplets may be sucked into the air guiding member during the operation of the cleaning equipment, affecting the normal operation of the air guiding member. FIG. 1 shows a schematic structural view of the sewage tank in one or more embodiments of this application, FIG. 2 shows a front view schematic of FIG. 1, and FIG. 3 shows a schematic logical control view of the cleaning equipment having the sewage tank shown in FIG. 1. Combining FIG. 1 and FIG. 2, in the first aspect of this application, this application provides a sewage tank cover assembly a for installing on the sewage tank b of the cleaning equipment. A air guiding member for creating negative pressure in the sewage tank b is provided on the cleaning equipment, and the air guiding member can be a blower. FIG. 4 shows a schematic structural view of a sewage tank cover assembly in one or more embodiments of the present application. FIG. 5 shows a schematic structural view of FIG. 4 from a first perspective. FIG. 6 shows a schematic structural view of FIG. 4 from a second perspective. FIG. 7 shows a schematic view of water level detection of the sewage tank shown in FIG. 1 in a target posture. With reference to FIGS. 4-7, the sewage tank cover assembly a includes a cover body 1, a first electrode 2, and a second electrode 3. The cover body 1 is provided with an air outlet portion 101, and the air outlet portion 101 is connected to an air guiding member d. When the air guiding member d operates, the air in the sewage tank b is extracted through the air outlet portion 101, so that a negative pressure is formed in the sewage tank b, and sewage together with solid waste is sucked into the sewage tank b through a pipeline. The first electrode 2 and the second electrode 3 are both connected to the cover body 1. The first electrode 2 has a first triggering portion 201, and the second electrode 3 has a second triggering portion 301, which is used to generate a triggering signal when the first triggering portion 201 and the second triggering portion 301 are conducted by the water body in the sewage tank b, so that the cleaning device adjusts the operating parameters of the air guiding member according to the corresponding triggering signal. For the sewage tank cover assembly a provided by the present application, under the condition that the water body in the sewage tank b conducts the first triggering portion 201 and the second triggering portion 301, the first triggering portion 201 and the second triggering portion 202 generate a triggering signal, so that the cleaning device adjusts the operating parameters of the air guiding member according to the corresponding triggering signal, so as to reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding member when the sewage tank is in an inclined posture, so that the air guiding member can operate normally, which has good practicability. The inclined posture is set as the target posture. When the cleaning device is in other postures, there is no water body between the first triggering portion 201 and the second triggering portion 301, the first triggering portion 201 and the second triggering portion 301 are not conducted, and no triggering signal for adjusting the operating parameters of the air guiding member is generated, and the air guiding member resumes the normal set power value to enable the device to operate normally. With reference to FIGS. 3 and 6, the cleaning device may further include a controller c. When the sewage tank b is in the target posture, the water body in the sewage tank b conducts the first triggering portion 201 and the second triggering portion 301 to output a triggering signal to the controller c. The triggering signal may be defined as a first triggering signal. The controller c receiving the first triggering signal outputs a control signal to the air guiding member d to reduce the operating power of the air guiding member d, so as to reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding member d, so that the air guiding member d can operate normally. When the sewage tank b is not in the above target posture, there is no water body between the first triggering portion 201 and the second triggering portion 301, the first triggering portion 201 and the second triggering portion 301 are not conducted, the controller c does not receive the above first triggering signal, and the air guiding member d correspondingly does not receive the control signal, and the air guiding member d resumes the normal set power value to enable the device to operate normally. In the related art, when the floor washer is operating, compared with the sewage tank b in the vertical state, the sewage tank b in the inclined state will cause more water droplets to appear on the water surface in the sewage tank b. Based on this, the target posture of the sewage tank b shown in the present application is set to the inclined posture of the sewage tank b. In addition, when the user pushes and pulls the floor washer, more water droplets will also appear on the water surface in the sewage tank b. Based on this, when the sewage tank b shown in the present application is inclined towards the back of the sewage tank b, that is, when the sewage tank b is inclined towards the user, the posture of the sewage tank b is set as the target posture. In some embodiments, the inclination angle of the sewage tank b can be less than or equal to 20°, that is, when the sewage tank b is at this inclination angle, the controller c is triggered to output a control signal to reduce the operation of the air guiding member d. When the sewage tank b is at other angles, the air guiding member d maintains the normal set operating power, so that the floor washer has good cleaning efficiency. In some embodiments, at least a part of the projections of the first trigger portion 201 and the second trigger portion 301 in the width direction of the sewage tank b (i.e., perpendicular to the front-back direction of the sewage tank b) may overlap, that is, when viewed from the width direction of the sewage tank b, at least a part of the first trigger portion 201 and the second trigger portion 301 are in the same direction. When the sewage tank b is in the target posture and the water body in the sewage tank b submerges the first trigger portion 201 of the first electrode 2 and the second trigger portion 301 of the second electrode 3, the water body in the sewage tank b conducts the first trigger portion 201 of the first electrode 2 and the second trigger portion 301 of the second electrode 3 to transmit a control signal to the controller c. In other embodiments, the projections of the first trigger portion 201 and the second trigger portion 301 in the width direction of the sewage tank b may also not overlap, that is, the first trigger portion 201 and the second trigger portion 301 may be arranged in sequence along the front-back direction of the sewage tank b. When the sewage tank b is in the target posture, the water body in the sewage tank b sequentially submerges the first trigger portion 201 of the first electrode 2 and the second trigger portion 301 of the second electrode 3. When both the first trigger portion 201 of the first electrode 2 and the second trigger portion 301 of the second electrode 3 are submerged in the water body in the sewage tank b, the water body in the sewage tank b conducts the first trigger portion 201 of the first electrode 2 and the second trigger portion 301 of the second electrode 3 to transmit a control signal to the controller c. Figure 8 shows a schematic structural diagram of the first electrode in Figure 4, and Figure 9 shows a schematic cross-sectional diagram of Figure 4. Combining Figure 8 and Figure 9, the first electrode 2 may include a first pole piece 202 and a second pole piece 203. Among them, the first pole piece 202 is disposed at the bottom of the cover body 1. The first pole piece 202 can be attached to the bottom of the cover body 1 in the front-rear direction. The first pole piece 202 is configured as the first trigger portion 201. The second pole piece 203 is connected to the top of the first pole piece 202. The second pole piece 203 passes through the cover body 1 and extends above the top of the cover body 1. In some embodiments, the first pole piece 202 and the second pole piece 203 can be integrally formed, and the two form an inverted T-shaped structure. The entire first pole piece 202 can be used as the first trigger portion 201, or a part of the first pole piece 202 can be used as the first trigger portion 201, which is not limited herein. In other embodiments, the first pole piece 202 and the second pole piece 203 can also form an L-shaped structure, which is not limited herein. Combining Figure 1 and Figure 2, the upper end of the second pole piece 203 can be connected to the first contact piece 4 provided on the box cover assembly through a wire. When the sewage tank b is placed on the main body of the floor washer, the first contact piece 4 will contact and connect with the corresponding contact point of the main body. Combining Figure 8, a process hole 204 can be provided on the first pole piece 202. The process hole 204 is consistent or substantially consistent with the length of the second pole piece 203. The bottom end of the second pole piece 203 can be connected to one side in the length direction of the process hole 204. When processing the process hole 204 on the first pole piece 202, the part of the first pole piece 202 located in the process hole 204 can be cut, but the end of this part needs to be kept connected to the first pole piece 202, and then this part is vertically bent to form the second pole piece 203, saving materials and facilitating processing. Figure 10 shows a schematic structural diagram of the second electrode in Figure 4. Combining Figure 10, in some embodiments, the second electrode 3 may include a third pole piece 302 and a fourth pole piece 303. The third pole piece 302 passes through the cover body 1 and extends below the bottom of the cover body 1, that is, the third pole piece 302 is arranged vertically. The part of the third pole piece 302 disposed below the bottom of the cover body 1 is configured as the second trigger portion 301. One end of the fourth pole piece 303 is connected to the top end of the third pole piece 302. The fourth pole piece 303 is arranged on the top of the cover body 1. The fourth pole piece 303 can be attached to the top of the cover body 1 in the front-rear direction. The part of the third pole piece 302 disposed below the bottom of the cover body 1 as a whole can be used as the second trigger portion 301, or a part of the part of the third pole piece 302 disposed below the bottom of the cover body 1 can be used as the second trigger portion 301, which is not limited herein. The third pole piece 302 and the fourth pole piece 303 can form an inverted L-shaped structure. In other embodiments, the top end of the third pole piece 302 can also protrude from the cover body 1, and one end of the fourth pole piece 303 is connected to the middle of the third pole piece 302, and the third pole piece 302 and the fourth pole piece 303 form a T-shaped structure that is flipped 90°. With reference to FIG. 10, in some embodiments, the second electrode 3 may further include a fifth pole piece 304. The bottom end of the fifth pole piece 304 is connected to the other end of the fourth pole piece 303, and the top end extends in a direction away from the cover body 1. With reference to FIGS. 1 and 2, the upper end of the fifth pole piece 304 may be connected to the second contact piece 5 provided on the tank cover assembly through a wire. When the sewage tank b is placed on the main body of the floor washer, the second contact piece 5 will contact and connect with the corresponding contact point of the main body. With reference to FIGS. 5 and 6, in some embodiments, the sewage tank cover assembly a may further include a separator 6. The separator 6 is connected to the bottom of the cover body 1 and is disposed between the first trigger portion 201 and the second trigger portion 301. The separator 6 is an insulating member, which can prevent a water film from being formed between the first trigger portion 201 and the second trigger portion 301 to cause the two to be connected, so as to prevent a first trigger signal from being generated to the controller c when the sewage tank b is not in the target posture. In some embodiments, the separator 6 may be made of plastic material and is integrally formed at the bottom of the cover body 1. In other embodiments, the separator 6 may also be inserted or / and adhered to the bottom of the cover body 1, which is not limited herein. With reference to FIGS. 4, 5, 6 and 9, the sewage tank cover assembly a may further include a third electrode 7 and a fourth electrode 8. Both the third electrode 7 and the fourth electrode 8 are connected to the cover body 1. The third electrode 7 has a third trigger portion 701, and the third trigger portion 701 is disposed below the cover body 1. The fourth electrode 8 has a fifth trigger portion 801, and the fifth trigger portion 801 is disposed below the cover body 1. FIG. 11 shows a schematic diagram of water level detection of the sewage tank shown in FIG. 1 in a vertical posture. With reference to FIGS. 3 and 11, under the condition that the sewage tank b is at the first target water level, the water body in the sewage tank b conducts the third trigger portion 701 and the fifth trigger portion 801 to output a second trigger signal to the controller c. The controller c receiving the second trigger signal outputs a water level warning message. That is, the third trigger portion 701 of the third electrode 7 and the fifth trigger portion 801 of the fourth electrode 8 cooperate with each other to output a first full water message to remind the user to pay attention to the water level of the water body in the sewage tank b. The device may stop working and issue a warning message to the user to clean the sewage tank b. The water level warning message may be a sound or a light message, which is not limited herein. The first target water level may be the water level in the sewage tank b when the body is in an upright posture or an inclined posture with an inclination angle greater than or equal to 30°. Figure 12 shows a schematic diagram of water level detection of the sewage tank shown in Figure 1 in an inclined posture. With reference to Figures 5, 6, 11, and 12, in some embodiments, the fifth trigger portion 801 can be disposed below the third trigger portion 701, that is, there is a height difference between the bottom of the fifth trigger portion 801 and the third trigger portion 701. Under the condition that the body of the floor washer twists, the water body in the sewage tank b twists accordingly, so that the third trigger portion 701 and the fifth trigger portion 801 are conducted through the water body in the sewage tank b to realize water level detection in the twisted posture of the body. With reference to Figures 5 and 6, in some embodiments, the third electrode 7 further has a fourth trigger portion 702, and the fourth trigger portion 702 is disposed between the cover body 1 and the third trigger portion 701, that is, the third trigger portion 701 is disposed below the fourth trigger portion 702. With reference to Figure 3, under the condition that the sewage tank b is at the second target water level, the water body in the sewage tank b conducts the fourth trigger portion 702 and the first trigger portion 201 to output a third trigger signal to the controller c. The controller c receiving the third trigger signal outputs a water full message, the device stops working, and a warning message for cleaning the sewage tank b is sent to the user. The warning message can be a sound or a light warning, which is not limited herein. The second target water level can be the water level in the sewage tank b in an inclined posture where the body is in an inclined posture and the inclination angle can be less than or equal to 30°. Figure 13 shows a schematic structural diagram of the third electrode in Figure 4, and Figure 14 shows a cross-sectional schematic diagram of Figure 13. With reference to Figures 4, 5, 6, 13, and 14, the third electrode 7 can include a housing 703, a first pole column 704, a second pole column 705, a sixth pole piece 706, and a seventh pole piece 707. Among them, the housing 703 is connected to the bottom of the cover body 1, the first pole column 704 and the second pole column 705 are arranged vertically and parallel to each other in the housing 703, the bottom ends of the first pole column 704 and the second pole column 705 both extend out of the bottom of the housing 703, the portion of the first pole column 704 extending out of the bottom of the housing 703 is configured as the third trigger portion 701, the portion of the second pole column 705 extending out of the bottom of the housing 703 is configured as the fourth trigger portion 702, one end of the sixth pole piece 706 is disposed in the housing 703, and the other end extends out of the housing 703. The sixth pole piece 706 is connected to the first pole column 704 and the second pole column 705, the bottom end of the seventh pole piece 707 is connected to the other end of the sixth pole piece 706, and the top end of the seventh pole piece 707 passes through the cover body 1. With reference to Figures 1 and 2, the upper end of the seventh pole piece 707 can be connected to the third contact piece 10 provided on the tank cover assembly through a wire. When the sewage tank b is placed on the main body of the floor washer, the third contact piece 10 will contact and connect with the corresponding contact point of the main body. In specific implementation, the housing 703 can be connected to the corresponding parts of the pole post and the pole piece in the form of overmolding. The cover 1 is provided with mounting holes matching the housing 703, and the housing 703 is fixedly connected in the mounting holes. With reference to FIGS. 12 and 13, a sealing groove 708 can be provided on the outer peripheral surface of the housing 703, and a sealing ring can be provided in the sealing groove 708 to achieve the sealing between the housing 703 and the cover 1. In some embodiments, the first pole post 704 and the second pole post 705 can be inserted into the sixth pole piece 706 by interference fit to achieve good electrical conductivity. The seventh pole piece 707 can be integrally formed with the sixth pole piece 706, and the two can form an L-shaped structure or a T-shaped structure, which is not limited herein. With reference to FIGS. 4-6, in some embodiments, two third electrodes 7 can be relatively arranged. The two third electrodes 7 can be symmetrically arranged along the width direction (i.e., the left-right direction) of the cover 1 with the vertical center line of the cover 1 as the axis. Therefore, when the device is twisted to the left or right, the third trigger part 701 will be electrically connected to the fifth trigger part through the water body, and the fourth trigger part 702 will be electrically connected to the first trigger part 201 through the water body, realizing the water level detection in the state of the fuselage twist, which has good practicability. With reference to FIGS. 4 and 6, the two third electrodes 7 can be arranged on the side facing away from the user with respect to the fourth electrode 8, that is, the two third electrodes 7 can be arranged on the front side in the sewage tank b. When the device is tilted forward or lying flat forward, the third trigger part 701 and the fourth trigger part 702 will be electrically connected to the corresponding trigger parts through the water body in the sewage tank b, realizing the water level detection in the state of the fuselage tilt or lying flat, which has good practicability. [Corrected according to Rule 91 on 02.01.2025] With reference to FIGS. 5, 6, 8, 9, 11 and 12, in some embodiments, the fourth electrode 8 can be connected to the first electrode 2 to form a common electrode. That is, the common electrode has two trigger parts, namely the first electrode 2 and the fourth electrode 8. The fourth electrode 8 can be integrally formed with the first electrode 2, or connected by means of plugging, welding, etc., which is not limited herein. The common electrode can be arranged on the vertical bisector of the two third electrodes 7, or offset from the vertical bisector of the two third electrodes 7, which is not limited herein. Referring to FIGS. 5 and 6, in some embodiments, the sewage tank cover assembly a may further include a support member 9. The support member 9 may be plate-shaped, with its top end connected to the bottom of the cover body 1 and its bottom end extending away from the cover body 1. A groove 901 may be provided on the support member 9, and the fourth electrode 8 is disposed on the groove 901 of the support member 9. The fourth electrode 8 may be fixed to the groove 901 of the support member 9 by bolts or bonding. Referring to FIG. 4, in some embodiments, the bottom end of the fourth electrode 8 extends out of the bottom end of the support member 9, and the portion where the fourth electrode 8 extends out of the bottom end of the support member 9 may be configured as a fifth trigger portion 801, or / and, a through hole 902 may also be provided at the bottom of the support member 9, and the portion where the fourth electrode 8 is exposed in the through hole 902 may also be configured as a fifth trigger portion 801. In other embodiments, the fourth electrode 8 may not be connected to the first electrode 2 either. The fourth electrode 8 is provided on the cover body 1 as an independent electrode for cooperating with the third trigger portion 701 and the fourth trigger portion 702, and there is no limitation here. It should be noted that the non-trigger portions of each pole piece can be wrapped with an electrode housing. The material of the electrode housing can be hydrophobic and oleophobic Teflon or PP material, and its surface is smooth, which can effectively prevent the sewage in the sewage tank b from adhering. In addition, since the electrode for water level detection is columnar, it can prevent the water film generated between the electrodes from conducting the electrodes, resulting in false alarms of the water level of the device, and has good practicability. In the related art, since the air guiding member d is communicated with the sewage tank b through the air outlet portion 101 to extract the air in the sewage tank b to make the sewage tank b form a negative pressure. During actual use, the water body in the sewage tank b may enter the air guiding member d through the air outlet portion 101, affecting the normal operation of the air guiding member d. Based on the above technical problems, the present application further improves the sewage tank cover assembly a to improve the phenomenon that the water body in the sewage tank b enters the air guiding member d through the air outlet portion 101, so as to ensure the normal operation of the air guiding member d to a certain extent. FIG. 15 shows a schematic structural diagram of the cover body in FIG. 4. Referring to FIGS. 1, 2, 4, 9, and 15, the sewage tank cover assembly a may further include an air outlet body 11. The air outlet body 11 is connected in the air outlet portion 101 of the cover body 1. An air inlet 1101 is provided on the side wall of the air outlet body 11, and a water blocking portion 1102 is provided at the bottom of the air outlet body 11 to block the water body in the sewage tank b from entering the air outlet body 11. The sewage tank cover assembly a provided by the present application. Since an air outlet body 11 is connected inside the air outlet part 101 of the cover body 1, and an air inlet 1101 is arranged on the side part of the air outlet body 11, the air in the sewage tank b can be led into the air outlet body 11 through the air inlet 1101 and then led out of the sewage tank b through the air guiding member d. Since a water blocking part 1102 is arranged at the bottom of the air outlet body 11, when there is water in the sewage tank b, if the device is tilted in the opening direction of the air inlet 1101, the water blocking part 1102 at the bottom of the air outlet body 11 can block the water body in the sewage tank b, preventing the water body from flowing into the air outlet body 11 and further preventing the water from entering the air guiding member d, playing a role in protecting the air guiding member d. When the device is tilted in other directions, since there is no air inlet 1101 arranged in other directions of the air outlet body 11, the water body in the sewage tank b cannot enter the air outlet body 11 either. Thus, the phenomenon that the water body in the sewage tank b enters the air guiding member d through the air outlet part 101 can be improved, to ensure the normal operation of the air guiding member d to a certain extent, and it has good practicability. In some embodiments, the air inlet 1101 of the air outlet body 11 can face the front side of the sewage tank b. When there is water in the sewage tank b, if the device is tilted forward, the water blocking part 1102 at the bottom of the air outlet body 11 can block the water body in the sewage tank b, preventing the water body from flowing into the air outlet body 11 and further preventing the water from entering the air guiding member d, playing a role in protecting the air guiding member d. In other embodiments, the air inlet 1101 of the air outlet body can be arranged on the left side, right side or rear side, which will not be elaborated here. In some embodiments, at least part of the bottom of the air outlet body 11 is provided with a first inclined surface, and the side of the first inclined surface facing the air inlet 1101 is lower than the side of the first inclined surface away from the air inlet 1101. The first inclined surface is configured as the water blocking part 1102. When there is water in the sewage tank b, if the device is tilted in the opening direction of the air inlet 1101, the first inclined surface at the bottom of the air outlet body 11 can block the water body in the sewage tank b, preventing the water body from flowing into the air outlet body 11 and further preventing the water from entering the air guiding member d, playing a role in protecting the air guiding member d. There can be only one first inclined surface, or multiple first inclined surfaces can be arranged along the air inlet direction (as shown in Fig. 16). The slopes of the multiple first inclined surfaces can be the same or different, which is not limited here. In other embodiments, at least part of the bottom of the air outlet body 11 can also be provided with a first step, and the first step can be configured as the water blocking part 1102. When there is water in the sewage tank b, if the device is tilted in the opening direction of the air inlet 1101, the step at the bottom of the air outlet body 11 can block the water body in the sewage tank b, preventing the water body from flowing into the air outlet body 11 and further preventing the water from entering the air guiding member d, playing a role in protecting the air guiding member d. There can be only one first step, or multiple first steps can be arranged at intervals continuously (as shown in Fig. 17), which is not limited here. Figure 18 shows a schematic structural view of another perspective of Figure 15. Combining Figure 15 and Figure 18, an air outlet cavity 1103 and an air inlet cavity 1104 can be provided on the air outlet body 11. The air inlet cavity 1104 is communicated with the air outlet cavity 1103. The air inlet 1101 is arranged on the side of the air inlet cavity 1104. The bottom of the air inlet cavity 1104 can be configured as a first inclined plane as a water blocking part 1102 to block the water in the sewage tank b from entering the air inlet cavity 1104. Combining Figure 18, in some embodiments, a water guiding part 1105 is provided at the bottom of the air outlet cavity 1103. The water guiding part 1105 is located downstream of the water blocking part 1102 in the wind direction. When the device is working or in an abnormal use state, if water enters the air outlet body 11, when the device is vertical, the water can flow into the sewage tank b along the water guiding part 1105 and the bottom of the air inlet cavity 1104, and to a certain extent, it can also avoid the phenomenon that the water in the air outlet body 11 enters the air guiding part d, so as to ensure the normal operation of the air guiding part d to a certain extent and has good practicability. In some embodiments, at least part of the bottom of the air outlet cavity 1103 is provided with a second inclined plane. The bottom of the second inclined plane is higher than the top of the first inclined plane. The second inclined plane is configured as the above-mentioned water guiding part 1105. When the device is working or in an abnormal use state, if water enters the air outlet body 11, when the device is vertical, the water can flow into the sewage tank b along the second inclined plane at the bottom of the air outlet cavity 1103 and the bottom of the air inlet cavity 1104, and to a certain extent, it can also avoid the phenomenon that the water in the air outlet body 11 enters the air guiding part d, so as to ensure the normal operation of the air guiding part d to a certain extent and has good practicability. There can be only one second inclined plane, or multiple second inclined planes can be arranged along the air inlet direction (as shown in Figure 19). The slopes of the multiple first inclined planes can be the same or different, and no limitation is made here. In other embodiments, at least part of the bottom of the air outlet cavity 1103 can also be provided with a second step. The second step can be configured as the water guiding part 1105. When the device is working or in an abnormal use state, if water enters the air outlet body 11, when the device is vertical, the water can flow into the sewage tank b along the second inclined plane and the bottom of the air inlet cavity 1104, and to a certain extent, it can also avoid the phenomenon that the water in the air outlet body 11 enters the air guiding part d, so as to ensure the normal operation of the air guiding part d to a certain extent and has good practicability. There can be only one second step, or multiple second steps can be arranged along the air inlet direction (as shown in Figure 20). The heights of the multiple second steps can be the same or different, and no limitation is made here. Combined with FIGS. 15 and 18, in some embodiments, the bottom of the air outlet cavity 1103 may include a first bottom 1106 and a second bottom 1107. The first bottom 1106 connects the front side and the rear side of the air outlet cavity 1103. The water guiding part 1105 is arranged on the first bottom 1106. The second bottom 1107 is arranged on the side part in the width direction of the first bottom 1106. The second bottom 1107 connects the front side of the air outlet cavity 1103. There is a distance between the second bottom 1107 and the rear side of the air outlet cavity 1103. The second bottom 1107 is configured as the top of the air inlet cavity 1104. The bottom of the air inlet cavity 1104 extends and connects to the rear side of the air outlet cavity 1103. When the air guiding member d works, the air in the sewage tank b enters the air inlet box through the air inlet 1101 on the side of the air inlet cavity 1104, flows through the air inlet cavity 1104 and the air outlet cavity 1103 in sequence, and finally flows out from the air outlet at the top of the air outlet cavity 1103, so that the sewage tank b is in a negative pressure state. Combined with FIG. 18, in some embodiments, the second bottom 1107 of the air outlet cavity 1103 may be higher than the first bottom 1106, and the bottom of the air inlet cavity 1104 may be lower than the first bottom 1106, so that the rear side of the air inlet cavity 1104 is communicated with the air outlet cavity 1103. The first bottom 1106 as a whole can be used as the second inclined plane to serve as the water guiding part 1105. Combined with FIGS. 15 and 18, in some embodiments, there may be two air inlet cavities 1104, and the two air inlet cavities 1104 are relatively arranged on both sides in the width direction of the air outlet cavity 1103. In this case, the cross section of the air outlet cavity 1103 may gradually shrink along the air inlet direction, and the air outlet cavity 1103 may be in an inverted convex shape. Combined with FIGS. 4 and 15, in some embodiments, the sewage tank cover assembly a may further include a wind guiding member 12. The wind guiding member 12 is connected to the bottom of the cover body 1. When the sewage tank cover assembly a is assembled in the sewage tank b, the two sides in the width direction of the wind guiding member 12 are in contact with the side wall of the sewage tank b. There is a distance between the bottom of the wind guiding member 12 and the bottom of the sewage tank b for air to pass through. The air inlet cavity 1104 may be connected to the wind guiding member 12, and the air outlet of the air inlet cavity 1104 is arranged on the wind guiding member 12. When the air guiding member d works, the air in the sewage tank b is guided by the wind guiding member 12 to enter the air inlet 1101 on the side of the air inlet cavity 1104, and then is introduced into the air inlet box, flows through the air inlet cavity 1104 and the air outlet cavity 1103 in sequence, and finally flows out from the air outlet at the top of the air outlet cavity 1103, so that the sewage tank b is in a negative pressure state. An opening may be provided in the middle of the air guiding member 12 to avoid the pipeline arranged in the sewage tank b. In addition, with reference to FIGS. 4 and 15, the sewage tank cover assembly a further includes two spaced air limiting members 13. The top of the air limiting member 13 is connected to the bottom of the cover body 1, and one side of the air limiting member 13 is connected to the air guiding member 12. Under the condition that the sewage tank cover assembly a is assembled in the sewage tank b, the other side of the air limiting member 13 is in contact with the side wall of the sewage tank b, and there is a distance between the bottom of the air limiting member 13 and the bottom of the sewage tank b. The air outlet of the air inlet cavity 1104 is arranged outside the two partition members 6 on both sides. The partition member 6, the air guiding member 12 and the side wall of the sewage tank b can be configured to form an air guiding channel. When the air guiding member d works, the air in the sewage tank b enters the air inlet 1101 on the side of the air inlet cavity 1104 through the guidance of the air guiding channel, and then is introduced into the air inlet box body, flowing through the air inlet cavity 1104 and the air outlet cavity 1103 in sequence, and finally flowing out from the air outlet at the top of the air outlet cavity 1103, so that the inside of the sewage tank b is in a negative pressure state. The setting of the air guiding channel can reduce the air guiding area to improve the air guiding efficiency. In order to improve the sealing effect, a sealing member may be provided between the periphery of the air guiding member 12 and the periphery of the partition member 6 and the side wall of the sewage tank b, so that the air can only be led out along a predetermined direction to avoid disorder and improve the air guiding efficiency. With reference to FIGS. 4-6, in some embodiments, the sewage tank cover assembly a may further include a bracket 17. The bracket 17 is connected to the bottom of the cover body 1. There may be two brackets 17. Under the condition that the sewage tank cover assembly a is assembled in the sewage tank b, the bracket 17 supports on the side wall of the sewage tank b. Specifically in implementation, the bracket 17 may support on the plane of the handle 15 on the side wall of the sewage tank b to ensure that the sealing member can effectively cooperate with the inner wall of the sewage tank b to improve the sealing effect between the air guiding member 12, the partition member 6 and the side wall of the sewage tank b. With reference to FIGS. 4-6, two partition members 6 may be arranged on the front side of the air guiding member 12, and two support members 9 may be arranged on the rear side of the air guiding member 12. The air guiding member 12, the partition member 6 and the support member 9 may be connected to the cover body 1 in an integrally formed manner for convenient assembly. With reference to FIGS. 1 and 2, in some embodiments, a filter member 16 may further be arranged in the air outlet part 101. The filter member 16 is arranged in the air outlet cavity 1103 to filter out the impurities contained in the air to prevent the impurities from entering the air guiding member d. In the second aspect of the present application, the present application further provides a sewage tank, which includes a tank body b1 and the above-mentioned sewage tank cover assembly a. FIG. 21 shows a schematic structural view of the sewage tank in FIG. 1. With reference to FIGS. 1, 2 and 21, the tank body b1 is provided with an inlet and outlet b2, and the cover body 1 of the above-mentioned sewage tank cover assembly a is detachably arranged in the inlet and outlet b2 of the tank body b1. The sewage tank provided by the present application can not only reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding member d, enabling the air guiding member d to operate normally, but also detect the water level in the sewage tank b in different postures, and can also prevent the water body in the sewage tank b from entering the air guiding member d, which has good practicability. With reference to FIG. 4, a seal 18 can be provided around the cover 1 to enable the cover 1 and the inlet / outlet b2 of the box body b1 to have a good sealing effect, so as to prevent the water body in the box body b1 from flowing to other positions of the equipment through the inlet / outlet b2. In the third aspect of the present application, the present application also provides a cleaning device, and the cleaning device includes the above-mentioned sewage tank. The cleaning device provided by the present application can not only reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding member d, enabling the air guiding member d to operate normally, but also detect the water level in the sewage tank b in different postures, and can also prevent the water body in the sewage tank b from entering the air guiding member d, which has good practicability. The cleaning device can be a floor washer or other types of cleaning devices, such as a mopping machine, a water suction machine, or a floor sweeping device, etc., which is not limited herein. When the cleaning device operates in the target posture, when the user pushes and pulls the device, the sewage in the sewage tank b will shake under the action of inertia, so that the first trigger part 201 and the second trigger part 301 will not be continuously in the conducting state, and the air guiding member d will resume its original power operation, which is not conducive to the normal operation of the air guiding member d. The embodiment of the present disclosure also provides a cleaning system, and the cleaning system includes a base station and the cleaning device provided by the above embodiment. After the floor washer is used up, it is usually placed back on the base station, supported by the base station, and the self-cleaning of the cleaning device can be carried out on the base station. In order to ensure that the cleaning device can normally maintain the low-power operation of the air guiding member d in the target posture, in the fourth aspect of the present application, the present application also provides a control method for a cleaning device, and the control method includes: the water body in the sewage tank b conducts the first trigger part 201 and the second trigger part 301 to output a first trigger signal; in response to the first trigger signal; according to the first trigger signal, control the operating power of the fan to be reduced to a preset power until the operating duration of the preset power reaches a preset duration. In this control method, when the water in the sewage tank b conducts the first trigger part 201 and the second trigger part 301, the operating power of the air guiding part d is immediately controlled to be reduced to a preset power. During the preset duration when the air guiding part d operates at the preset power, regardless of whether the first trigger part 201 and the second trigger part 301 are in a conducting state, the air guiding part d still operates at this preset power. That is, the air guiding part d has a delay function when operating at the preset power. Thus, under the condition that the sewage in the sewage tank b sways under the action of inertia and the first trigger part 201 and the second trigger part 301 are not continuously in a conducting state, the air guiding part d can also operate at the preset power to reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding part d, enabling the air guiding part d to operate normally, which has good practicability. After controlling the fan to reduce from the current operating power to the preset power according to the first trigger signal, the method further includes: determining whether the first trigger signal is received during the operating duration; if so, updating the starting measurement moment of the operating duration. That is, after the air guiding part d receives the first trigger signal during the operating duration, the preset duration is re-timed so that the air guiding part d continues to operate at the preset power for the preset duration to reduce the risk of water droplets generated on the water surface in the sewage tank b being sucked into the air guiding part d, enabling the air guiding part d to operate normally, which has good practicability. After controlling the fan to reduce from the current operating power to the preset power according to the first trigger signal, the method further includes: determining whether the first trigger signal is received when the operating duration ends; if so, controlling the fan to continue to operate at the preset power for the preset duration; if not, controlling the fan to resume to the normal operating power. That is, after the operating duration ends and no response to the first trigger signal is received, it can be determined that the sewage tank b is not in the target posture, and then the air guiding part d can be controlled to operate at the normally set operating power, so that the mopping machine has good cleaning efficiency. In some embodiments, the preset duration can be 3 - 5 seconds, or it can be set accordingly according to the actual operating conditions, and no limitation is made here. In this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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, and thus should not be construed as a limitation to the present application. In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the present application, the descriptions such as "first", "second", etc. are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined. Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A sewage tank cover assembly for being installed on a sewage tank of a cleaning device, wherein an air guiding member for creating negative pressure in the sewage tank is provided on the cleaning device, and among them, The sewage tank cover assembly includes: A cover body provided with an air outlet portion, and the air outlet portion is connected to the air guiding member; and A first electrode and a second electrode, which are respectively connected to the cover body. The first electrode has a first trigger portion, and the second electrode has a second trigger portion. When the first trigger portion and the second trigger portion are electrically conducted by the water body in the sewage tank, a trigger signal is generated, so that the cleaning device adjusts the operating parameters of the air guiding member according to the corresponding trigger signal.

2. The sewage tank cover assembly according to claim 1, wherein, When the sewage tank is in a condition of tilting towards the back of the sewage tank, the first trigger portion and the second trigger portion are electrically conducted by the water body in the sewage tank.

3. The sewage tank cover assembly according to claim 2, wherein, The tilting angle of the sewage tank is less than or equal to 20°.

4. The sewage tank cover assembly according to claim 2 or 3, wherein, At least a part of the projections of the first trigger portion and the second trigger portion in the width direction of the sewage tank overlap.

5. The sewage tank cover assembly according to claim 4, wherein, The first electrode includes: A first pole piece disposed at the bottom of the cover body, and the first pole piece is configured as the first trigger portion; A second pole piece connected to the first pole piece, and the second pole piece passes through the cover body and extends above the top of the cover body.

6. The sewage tank cover assembly according to claim 5, wherein, The first pole piece is provided with a process hole, and the bottom end of the second pole piece is connected to one side in the length direction of the process hole.

7. The sewage tank cover assembly according to claim 5 or 6, wherein, The second electrode includes: A third pole piece passing through the cover body and extending below the bottom of the cover body, and the portion of the third pole piece disposed below the bottom of the cover body is configured as the second trigger portion; A fourth pole piece, one end of which is connected to the top end of the third pole piece, and the fourth pole piece is disposed on the top of the cover body.

8. The sewage tank cover assembly according to claim 7, wherein, The second electrode further includes: A fifth pole piece, the bottom end of which is connected to the other end of the fourth pole piece, and the top end extends away from the cover body.

9. The sewage tank cover assembly according to any one of claims 1-3, 5-6 and 8, characterized in that, The sewage tank cover assembly further includes: A separator connected to the bottom of the cover body and disposed between the first trigger portion and the second trigger portion.

10. The sewage tank cover assembly according to any one of claims 1-3, 5, 6 or 8, wherein, The sewage tank cover assembly further includes: A third electrode connected to the cover body, the third electrode having a third trigger portion, and the third trigger portion is disposed below the cover body; A fourth electrode connected to the cover body, the fourth electrode having a fifth trigger portion, and the fifth trigger portion is disposed below the cover body; wherein; When the sewage tank is at a first target water level, the water body in the sewage tank electrically conducts the third trigger portion and the fifth trigger portion to output a first full water message, and the first target water level is the water level in the sewage tank when the sewage tank is in an upright posture, a tilted posture, or a twisted posture.

11. The sewage tank cover assembly according to claim 10, wherein, The fifth trigger portion is disposed below the third trigger portion.

12. The sewage tank cover assembly according to claim 10, wherein, The third electrode further has a fourth trigger portion, and the fourth trigger portion is disposed between the cover body and the third trigger portion; wherein: When the sewage tank is at a second target water level, the water body in the sewage tank electrically conducts the fourth trigger portion and the first trigger portion to output a second full water message, and the second target water level is the water level in the sewage tank when the sewage tank is in a posture with a tilting angle less than or equal to a preset tilting angle.

13. The sewage tank cover assembly according to claim 12, wherein, The third electrode includes: A housing disposed at the bottom of the cover body; The first pole column and the second pole column are arranged vertically in the housing. The bottom ends of the first pole column and the second pole column both extend out of the bottom of the housing. The part where the first pole column extends out of the bottom of the housing is configured as the third trigger part, and the part where the second pole column extends out of the bottom of the housing is configured as the fourth trigger part; The sixth pole piece has one end arranged in the housing and the other end extending out of the housing. The sixth pole piece is connected to the first pole column and the second pole column; The seventh pole piece has its bottom end connected to the other end of the sixth pole piece and its top end passing through the cover body.

14. The sewage tank cover assembly according to claim 10, wherein, The fourth electrode is connected to the first electrode to form a common electrode.

15. The sewage tank cover assembly according to claim 14, wherein, There are two third electrodes arranged oppositely, and the two third electrodes are arranged on both sides in the width direction of the common electrode.

16. The sewage tank cover assembly according to claim 10, wherein, The sewage tank cover assembly further includes: A support member connected to the bottom of the cover body. The fourth electrode is arranged on the support member, and the bottom end of the fourth electrode extends out of the bottom end of the support member. The part where the fourth electrode extends out of the bottom end of the support member is configured as the fifth trigger part, or / and, a guide through hole is provided at the bottom of the support member, and the part of the fourth electrode exposed in the guide through hole is configured as the fifth trigger part.

17. The sewage tank cover assembly according to any one of claims 1-3, 5-6, 8, and 11-16, wherein, The sewage tank cover assembly further includes: An air outlet body connected to the air outlet part of the cover body. An air inlet is provided on the side wall of the air outlet body, and a water blocking part is provided at the bottom of the air outlet body to block the water body in the sewage tank from entering the air outlet body.

18. The sewage tank cover assembly according to claim 17, wherein, The air inlet of the air outlet body faces the front side of the sewage tank.

19. The sewage tank cover assembly according to claim 17, wherein, At least part of the bottom of the air outlet body is provided with a first inclined surface. The side of the first inclined surface facing the air inlet is lower than the side of the first inclined surface away from the air inlet. The first inclined surface is configured as the water blocking part.

20. The sewage tank cover assembly according to claim 19, wherein, An air outlet cavity and an air inlet cavity are provided on the air outlet body. The air inlet cavity and the air outlet cavity are communicated. The air inlet is provided on the side wall of the air inlet cavity, and the bottom of the air inlet cavity is configured as the first inclined surface.

21. The sewage tank cover assembly according to claim 20, wherein, A water guiding part is provided at the bottom of the air outlet cavity. The water guiding part is located downstream of the water blocking part in the wind direction.

22. The sewage tank cover assembly according to claim 21, wherein, At least part of the bottom of the air outlet cavity is provided with a second inclined surface. The bottom of the second inclined surface is higher than the top of the first inclined surface. The second inclined surface is configured as the water guiding part.

23. The sewage tank cover assembly according to claim 22, wherein, The bottom of the air outlet cavity includes a first bottom and a second bottom. The first bottom connects the front side and the rear side of the air outlet cavity. The water guiding part is provided on the first bottom. The second bottom is provided on the side part in the width direction of the first bottom. The second bottom connects the front side of the air outlet cavity. There is a distance between the second bottom and the rear side of the air outlet cavity. The second bottom is constructed as the top of the air inlet cavity, and the bottom of the air inlet cavity extends and connects to the rear side of the air outlet cavity.

24. The sewage tank cover assembly according to claim 23, wherein, There may be two air inlet cavities, and the two air inlet cavities are arranged oppositely on both sides in the width direction of the air outlet cavity.

25. A sewage tank, the sewage tank includes: A box body provided with an inlet and an outlet; The sewage tank cover assembly according to any one of claims 1-24, wherein the cover body of the sewage tank cover assembly is detachably arranged in the inlet and outlet.

26. A cleaning device, wherein the cleaning device comprises the sewage tank according to claim 25.

27. A cleaning system, comprising: The cleaning device according to claim 26; And A base station configured to support the cleaning device.

28. A control method for a cleaning device, wherein the cleaning device comprises a sewage tank, the sewage tank comprises a tank body and the sewage tank cover assembly according to any one of claims 1-24, and the control method comprises: The water body in the sewage tank conducts the first trigger part and the second trigger part to output a first trigger signal; In response to the first trigger signal; According to the first trigger signal, control the operating power of the blower to be reduced to a preset power until the operating duration of the preset power reaches a preset duration.

29. The control method of the cleaning device according to claim 28, wherein, After controlling the blower to be reduced from the current operating power to the preset power according to the first trigger signal, the control method further comprises: Judge whether the first trigger signal is received during the operating duration; If the first trigger signal is received during the operating duration, update the starting measurement moment of the operating duration.

30. The control method of the cleaning device according to claim 28, wherein, After controlling the blower to be reduced from the current operating power to the preset power according to the first trigger signal, the control method further comprises: Judge whether the first trigger signal is received when the operating duration ends; If the first trigger signal is received when the operating duration ends, control the blower to continue operating at the preset power for a preset duration; if the first trigger signal is not received when the operating duration ends, control the blower to resume the normal operating power.

Images