Mopping machine

Abstract

The present application discloses a mopping machine, which relates to the technical field of cleaning machinery. The mopping machine comprises a housing, a water tank, a liquid level detection device and a rag fixing device. The water tank is used to store water for mopping. The liquid level detection device comprises a liquid level display module and a liquid level detection module. The rag fixing device is arranged at the bottom of the housing, and a water seepage device is arranged at the bottom of the water tank. The present invention realizes monitoring of the amount of water in the water tank of the mopping machine by simultaneously arranging the liquid level detection module and the liquid level display module, so that the user can easily and clearly know the amount of water in the water tank, so as to add water in time and prevent the rag from being too dry and affecting the mopping effect; wherein the liquid level detection module is arranged in the water tank, and is used to monitor the water level in the water tank in real time and feed it back to the liquid level display module, and the liquid level display module displays it to the user after analysis and processing. The user only needs to check the display information of the liquid level display module to clearly know the amount of water in the water tank, and thus make corresponding treatment.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning machinery, and in particular to a mopping machine. Background Art

[0002] In daily life, people need to frequently clean the floor of their house, such as sweeping and mopping the floor.

[0003] Since the mop needs to be soaked in water and then scrubbed when mopping the floor, a large amount of water stains will inevitably remain on the floor. For tile floors, it is very easy to slip and cause people to fall after getting wet; for wooden floors, water stains will remain for a long time and will penetrate into the floor, causing the floor to be eroded and decayed, affecting the service life of the wooden floor.

[0004] If the traditional mopping method is used, in order to avoid residual water stains on the ground, the ground needs to be wiped dry again with a dry mop, which greatly increases the workload of cleaning work. Not only is the efficiency low, but it also makes the cleaning work more time-consuming and laborious.

[0005] Now there are sweeping robots on the market that can clean the floor by themselves, which greatly liberates labor. However, this type of sweeping robot mainly vacuums and cannot achieve the effect of mopping the floor manually in daily life, and the cleaning degree is not enough. There are two types of sweeping robots on the market. One type does not have a water tank. The user directly fixes a dry or wet rag on the bottom of the robot, and the robot moves to mop the floor. First, mopping the floor with a dry rag can only adsorb dust on the rag, and cannot effectively scrub the floor. Secondly, if a wet rag is used, the user needs to pay attention to the amount of water in the rag at all times. It should not be too wet or too dry, and it needs to be replaced frequently, which is very troublesome. The second type has a water tank, which can humidify the rag, and the user does not need to replace the rag. However, it is usually impossible to know the amount of water in the water tank of the mopping machine in real time. The user needs to judge and add water based on experience and feeling, which may cause the water in the water tank to leak completely without being replenished. Summary of the invention

[0006] In view of the above problems, the present invention proposes a mopping machine which can monitor the amount of water in a water tank in real time and display the amount to the user.

[0007] The technical solution adopted by the present invention is as follows: a mopping machine, comprising a shell, a water tank, a liquid level detection device and a rag fixing device, wherein the water tank is arranged on the shell and is used to store water for mopping the floor, the liquid level detection device comprises a liquid level display module and a liquid level detection module, the liquid level detection module is arranged in the shell and is used to monitor the water level in the water tank in real time and feed back to the liquid level display module, the liquid level display module is fixed on the shell and is used to display the liquid level, the rag fixing device is arranged at the bottom of the shell and is used to fix the rag, and a water seepage device is provided at the bottom of the water tank for guiding the water in the water tank to the rag at the bottom of the shell.

[0008] Furthermore, the liquid level detection device further comprises a liquid level column, the liquid level detection module is provided with a liquid level detection end, and the liquid level column is connected to the liquid level detection end;

[0009] The liquid level column includes a conductor core, which is immersed in the liquid to be measured to form a capacitor with the liquid to be measured. The inductive capacitance value of the capacitor changes with the depth of the conductor core immersed in the liquid to be measured. The liquid level detection module measures the inductive capacitance value of the conductor core through the liquid level detection end, and obtains the depth of the conductor core immersed in the liquid to be measured according to the measured inductive capacitance value, thereby obtaining the liquid level height of the liquid to be measured.

[0010] Furthermore, the liquid level column also includes an insulating layer, and the insulating layer is wrapped on the outer wall of the conductor core.

[0011] Furthermore, the liquid level detection module is also provided with a display control terminal, and the display control terminal is connected to the liquid level display module. The liquid level detection module sends a display instruction to the liquid level display module through the display control terminal, and the liquid level display module displays the measured liquid level height.

[0012] Furthermore, the liquid level display module includes a display panel, on which a plurality of indicator lights are provided, each indicator light is connected to the display control end, and the liquid level detection module indicates different liquid level heights by controlling the number of indicator lights on the display panel.

[0013] Furthermore, the liquid level display module includes a display screen, which is connected to the display control terminal. The liquid level detection module sends a display instruction to the display screen in real time through the display control terminal, and the display screen displays the current liquid level value according to the display instruction.

[0014] Furthermore, it also includes a voice broadcast module, the liquid level detection module is connected to the voice broadcast module, when the liquid level detection module detects that the liquid level to be measured is lower than or higher than a preset threshold, the voice broadcast module is controlled to issue a voice alarm.

[0015] Furthermore, it also includes a control device and a walking device. The control device is arranged in the shell and is used to control the movement of the walking device. The walking device is arranged at the bottom of the shell and includes a universal wheel, a driving wheel and a driving motor. The driving motor is controlled by the control device to change the movement state of the driving wheel.

[0016] Furthermore, it also includes a position detection device, which includes an obstacle detector and a suspension detector, and both are connected to the control device for feeding back signals to the control device.

[0017] Furthermore, a sealing member is also included. The water tank includes a tank body and a tank cover. The sealing member is arranged at the junction of the tank body and the tank cover.

[0018] The beneficial effects of the present invention are as follows: the present invention realizes the monitoring of the water amount in the water tank of the mopping machine through the liquid level detection module and the liquid level display module, intuitively reflects the amount of water in the water tank, and is convenient for the user to add water in time to prevent the water in the water tank from leaking out and the rag from being too dry to affect the mopping effect; wherein the liquid level detection module is used to monitor the water level in the water tank in real time and intuitively reflect the water amount to the user through the liquid level display module, so that the user can make corresponding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the explosion structure of one embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the connection structure of a detection device according to an embodiment of the present invention;

[0022] Figure 4 is a capacitance equivalent principle diagram of a wire itself according to an embodiment of the present invention;

[0023] Figure 5 is a capacitance equivalent principle diagram of a conductor immersed in a liquid to be tested according to an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the principle of level mutation;

[0025] Figure 7 It is a curve diagram of charging time based on level mutation;

[0026] Figure 8 It is a curve diagram of the discharge time based on the level mutation;

[0027] Fig. 9 is a schematic diagram of a top view of the bottom shell structure of an embodiment of the present invention;

[0028] Fig.10 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0029] Fig.11 yes Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0030] Fig.12 yes Figure 2 Schematic diagram of the local enlarged structure at point C in the middle.

[0031] The reference numerals in the figure are: 1. Shell, 11. Bottom shell, 12. Upper cover, 2. Water tank, 21. Water storage tank, 211. Guide hole, 22. Dry and wet water tank, 221. Guide column, 222. Tank cover, 223. Water filling port, 3. Liquid level detection device, 31. Liquid level detection module, 32. Liquid level display module, 33. Liquid level column, 34. Voice broadcast module, 4. Flow control module, 5. Seal, 6. Position detection device, 61. Obstacle detector, 62. Suspension detector. DETAILED DESCRIPTION

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

[0033] See also Figure 1-3 This embodiment provides a mopping machine, including a shell 1, a water tank 2, a liquid level detection device 3 and a rag fixing device.

[0034] The water tank 2 is arranged on the housing 1 and is used to store water for mopping. The liquid level detection device 3 includes a liquid level detection module 31 and a liquid level display module 32. The liquid level detection module 31 is arranged in the housing 1 and is used to monitor the water level in the water tank 2 in real time and provide feedback to the liquid level display module 32. The liquid level display module 32 is fixed on the housing 1 and is used to display the liquid level. The rag fixing device is arranged at the bottom of the housing 1 and is used to fix the rag. The bottom of the water tank 2 is provided with a water seepage device, which is used to guide the water in the water tank 2 to the rag at the bottom of the housing 1.

[0035] By simultaneously providing the liquid level detection module 31 and the liquid level display module 32, the water level in the water tank 2 of the mopping machine can be monitored in real time, so that the user can easily and clearly know the amount of water in the water tank 2, so as to add water in time to prevent the water in the water tank 2 from leaking out and the rag from being too dry, thereby affecting the mopping effect; wherein the liquid level detection module 31 is used to monitor the water level in the water tank 2 in real time and feed back the water level to the liquid level display module 32, and after receiving the signal feedback from the liquid level detection module 31, the liquid level display module 32 analyzes and processes the signal and displays it to the user, and the user only needs to check the display information of the liquid level display module 32 to clearly know the water level in the water tank 2 and make corresponding processing.

[0036] See also Figure 3The liquid level detection device 3 further includes a liquid level column 33 and a voice broadcast module 34. The liquid level detection module 31 is provided with a liquid level detection terminal. The liquid level column 33 is connected to the liquid level detection terminal, and the voice broadcast module 34 is connected to the liquid level detection module 31.

[0037] The liquid level column 33 includes a conductor core. The liquid level column 33 is immersed in the liquid to be measured at different depths, and the size of its inductive capacitance will also change accordingly. The liquid level detection module 31 measures the size of the inductive capacitance of the liquid level column 33 through the liquid level detection end, and obtains the depth of the liquid level column 33 immersed in the liquid to be measured according to the measured capacitance, and then measures the liquid level of the liquid to be measured. In this embodiment, the liquid level column 33 is set in the water tank 2, so as to detect the water volume in the water tank 2 in real time.

[0038] In other embodiments, the liquid level column 33 further includes an insulating layer, and the insulating layer is wrapped on the outer wall of the conductor core.

[0039] The liquid level display module 32 displays the liquid level value of the liquid to be tested measured by the liquid level detection module 31. Specifically: the liquid level detection module 31 is provided with a liquid level detection end and a display control end, the liquid level detection end is connected to the liquid level column 33, and the display control end is connected to the liquid level display module 32. The liquid level detection module 31 detects the liquid level height through the liquid level detection end, and sends a display instruction to the liquid level display module 32 through the display control end to display the measured liquid level height.

[0040] See also Figure 1 In this embodiment, the liquid level display module 32 includes a display panel, and a plurality of indicator lights are provided on the display panel, each of which is connected to the display control terminal. The liquid level detection module 31 indicates different liquid level heights by controlling the number of indicator lights on the display panel. Preferably, the plurality of indicator lights are evenly arranged in a circle on the display panel. The longer the length of the liquid level column 33 immersed in the liquid to be tested is, the more indicator lights are lit. In order to make the indication result of the indicator light more intuitive, the plurality of indicator lights arranged in a circle are lit in a clockwise direction as the length of the liquid level column 33 immersed in the liquid to be tested increases. When all the indicator lights in the entire circle are lit, the measured liquid level is at the highest value. Of course, in other embodiments of the present invention, the plurality of indicator lights can also be arranged in other shapes such as rectangles and straight lines. The core purpose is to intuitively display the liquid level height, so the present invention does not limit this. In addition, the liquid level display module 32 can also exist in the form of a display screen, which is connected to the liquid level detection end. The detection module sends a display instruction to the display screen in real time through the liquid level detection end according to the liquid level value obtained by the detection, and the display screen displays the current liquid level value according to the display instruction. The display screen can be a liquid crystal display screen or a touch screen, etc. Its core purpose is to display the liquid level height. Therefore, the present invention does not limit the specific form of this liquid level display module 32.

[0041] The voice broadcast module 34 controls the voice broadcast module 34 to issue a voice alarm when the liquid level detection module 31 detects that the liquid level at the liquid level test point is lower than or higher than a preset threshold.

[0042] In summary, according to the principle that the inductive capacitance of the liquid level column 33 changes with the height at which it is immersed in the liquid to be measured, the liquid level detection module 31 is used to measure the capacitance value of the liquid level detection end, and the inductive capacitance of the liquid level column 33 is calculated by the capacitance value, and then the liquid level height of the liquid level measurement point, that is, the water level in the water tank 2 is measured. The specific principle is:

[0043] See also Figure 4 , 5 There is an inductive capacitor between any two conductive objects. For example, a conventional wire can form an inductive capacitor with the earth. Figure 4 As shown in the figure, when the surrounding environment remains unchanged, the inductive capacitance value is a fixed small value (equivalent to Cs). Figure 5 As shown, the wire is immersed in a weakly conductive liquid (taking fresh water as an example), and the length of the wire immersed in the fresh water is calculated using the size of the inductive capacitance of the wire. Since fresh water has weak conductivity, when the wire is immersed in fresh water, the parasitic capacitance in the liquid to be measured is coupled with the wire to form a new inductive capacitance (equivalent to Cx). At this time, the inductive capacitance (Cx) is the inductive capacitance (ΔC) of fresh water in parallel with the inductive capacitance (Cs) formed by the wire and the earth, which will increase the total inductive capacitance value, that is, Cx = ΔC + Cs. The inductive capacitance Cx of the wire in contact with fresh water will increase with the increase of the contact area between the wire and fresh water (the length immersed in fresh water), and has a certain proportional relationship. According to this characteristic, the liquid level detection module can calculate the length of the wire immersed in fresh water by measuring the slight change of the inductive capacitance Cx.

[0044] In addition, it should be noted that the present invention can be used not only to measure the liquid level height of water with weak conductivity, but also to measure the height of other liquids.

[0045] The liquid level detection method comprises the following steps:

[0046] S100, immersing the conductor core of the liquid level column in the liquid to be measured, wherein the conductor core is immersed in the liquid to be measured to form a capacitor with the liquid to be measured;

[0047] S200, the liquid level detection module measures the induced capacitance value of the conductor core through the liquid level detection end to obtain the induced capacitance value;

[0048] S300, obtaining the height of the liquid level column immersed in the liquid to be measured through the sensing capacitance value.

[0049] We can approximate the calculation of the inductive capacitance of the wire to the calculation of the capacitance of the coaxial cylindrical capacitor, that is:

[0050] C = 2πεL / ln(R1 / R2);

[0051] Where L is the length of the overlapping part of the two cylinders; R1 is the diameter of the outer cylinder electrode; R2 is the diameter of the inner cylinder electrode; ε is the dielectric constant of the intermediate medium; ln is the natural logarithm.

[0052] In practical applications, R1, R2, and ε are basically unchanged, so it is inferred that the capacitance C is directly proportional to the length, that is:

[0053] C = kL;

[0054] Where k = 2πε / ln(R1 / R2) is a constant. Therefore, as long as the capacitance C is measured, the liquid level can be known.

[0055] In other embodiments, the conductor core is immersed in the liquid to be tested to form a capacitor with the liquid to be tested, and the liquid level detection module measures the induced capacitance value of the conductor core through the liquid level detection end to obtain the induced capacitance value, which specifically includes:

[0056] Charging and discharging the capacitor, and detecting the time t consumed for the capacitor to be fully charged or fully discharged;

[0057] The inductive capacitance value of the liquid level column is calculated according to the time t.

[0058] In an RC circuit, the calculation formula for the capacitor charging and discharging time is:

[0059] t=R*C*Ln((V1-V0) / (V1-Vt));

[0060] Where t is time, R is resistance, C is capacitance, V0 is the initial voltage on the capacitor, V1 is the voltage value that the capacitor can eventually be charged or discharged to, Vt is the voltage value on the capacitor at time t, and Ln is the natural logarithm.

[0061] It can be seen that when R, V1, V0, and Vt are constants, the capacitor charging and discharging time t is also in direct proportion to the capacitance C, that is:

[0062] t = mC;

[0063] Wherein m=R*Ln((V1-V0) / (V1-Vt)) is a constant.

[0064] Finally, it can be deduced that:

[0065] L = t / (k*m);

[0066] It can be concluded that the length of the wire immersed in water is proportional to the charging and discharging time of the inductive capacitance of the wire.

[0067] Through the above formula conversion, we can get: C = t / R*Ln((V1-V0) / (V1-Vt)). According to this formula, we can calculate the value of capacitance C. In practical applications, there is no need to calculate capacitance C. We can directly calculate length L from time t, L = t / (k*m). In other embodiments, the conductor core is immersed in the liquid to be tested to form a capacitor with the liquid to be tested. The liquid level detection module measures the induced capacitance value of the conductor core through the liquid level detection end to obtain the induced capacitance value. It can also specifically include:

[0068] Controlling a sudden level change at the liquid level detection end, and detecting the time t consumed by the level value at the liquid level detection end exceeding the jump threshold value;

[0069] The inductive capacitance value of the liquid level column is calculated according to the time t.

[0070] More specifically, in this embodiment, controlling the level mutation of the liquid level detection terminal is as follows: making the liquid level detection terminal low level, even if the charge in the sensing capacitor is zero, setting the liquid level detection terminal to a floating input interrupt and charging the sensing capacitor to make it reach a high level, please refer to Figure 7 ;or,

[0071] Make the liquid level detection terminal high level, even if the charge in the sensing capacitor is saturated, set the liquid level detection terminal to a floating input interrupt and discharge the sensing capacitor to make it reach a low level, please refer to Figure 8 .

[0072] Since the detection of sudden level changes can be completed by a single-chip microcomputer, the cost is lower.

[0073] The specific implementation method is: when the container is dry, the charging time is TCs (reference time). When the probe detects water, the capacitance increases, and the charging time t is TCx = TΔC + TCs. Since TCs is fixed when the liquid to be tested remains unchanged, the water level can be determined by detecting the overall capacitance charging and discharging time. The longer the time t is, the higher the water level is, and vice versa.

[0074] The height of the liquid level column immersed in the liquid to be measured is calculated by sensing the capacitance value based on the following: the capacitance value is positively correlated with the height of the liquid level column immersed in the liquid to be measured. The larger the capacitance value, the higher the height of the liquid level column immersed in the liquid to be measured.

[0075] In order to make the sudden level change at the control liquid level detection end clearer, the implementation process is described in detail below:

[0076] Figure 6 In the figure, R1 is the charging resistor of the detection capacitor.

[0077] R2: The charging and discharging resistance of the detection capacitor.

[0078] Cs: The base capacitance of the detection rod when the container is dry.

[0079] ΔC: When the probe detects water, the inductive (parasitic) capacitance formed by the water and the probe.

[0080] Cx:ΔC+Cs.

[0081] Microcontroller IO port. Figure 7 TCs: reference time, charging time when the container is dry.

[0082] TCx: reference time + variable time. When the probe detects water, the capacitance increases and its charging time becomes longer.

[0083] Combination Figure 6 and Figure 7 As shown, the liquid level detection module adopts a conventional single-chip microcomputer (of course, a single-chip microcomputer with a touch sensing controller function or a dedicated touch sensing control device can also be used. The method of this type of device is relatively simple, and you only need to refer to the method of using the touch sensing function of the device for application). A pin of the single-chip microcomputer is connected to the liquid level column as the liquid level detection end, and the liquid level detection end is set to a push-pull output.

[0084] There are two general cases of level mutation, namely: low level mutation to high level (rising edge mutation) and high level mutation to low level (falling edge mutation). The following is a detailed description of the above two cases:

[0085] For water level detection process (rising edge method), please refer to Figure 7 :

[0086] The MCU pin is set to push-pull output, outputting 0 to discharge the capacitor to 0; the MCU pin is set to floating input, the capacitor Cx starts to charge, and the timer starts timing; at the same time, the input capture of the MCU pin is turned on to start capturing; wait for charging to be completed (charged to Vth, a rising edge interrupt is detected), read the timer time; and calculate the water level value.

[0087] For water level detection process (falling edge method), please refer to Figure 8 :

[0088] The MCU pin is set to push-pull output, output 1, and the capacitor is charged to VC; the MCU pin is set to floating input, the capacitor Cx starts to discharge, and the timer starts timing; at the same time, the input capture of the MCU pin is turned on to start capturing; wait for the discharge to be completed (discharge to Vtl, detect the falling edge interrupt), read the timer time; calculate the water level height value.

[0089] In addition, in order to improve the measurement accuracy, the above processes can all be involved in the implementation method, and the voltage mutations at the rising and falling edges of the liquid level detection end are performed in sequence, and the average value is calculated for multiple times.

[0090] In addition, it should be noted that the detection method that can be used in this application is not limited to the above method, and other detection methods can also be used, such as: current and voltage phase difference detection, oscillator frequency detection composed of capacitors, capacitor bridge charge transfer detection, etc. Here we use an RC loop composed of an inductive capacitor and a resistor to detect the change in the charge and discharge time of the capacitor. No dedicated detection circuit is required, and the cost is low.

[0091] See also Figure 1 , 2 The shell 1 includes a bottom shell 11 and an upper cover 12, and the water tank 2 includes a water storage tank 21 and a dry and wet water tank 22. The water storage tank 21 is used to store a large amount of water for mopping the floor, and the dry and wet water tank 22 is used to supply water to the rag in batches. In this embodiment, the dry and wet water tank 22 is arranged on the shell 1 and is an integrated structure with the shell 1. The rag fixing device is arranged at the bottom of the shell 1, that is, at the bottom of the dry and wet water tank 22. The water infiltration device is arranged at the bottom of the dry and wet water tank 22, and is used to guide the water in the dry and wet water tank 22 to the rag. In this embodiment, the water infiltration device is a plurality of evenly distributed water outlet holes, and the water in the dry and wet water tank 22 can leak out through the water outlet holes and directly leak onto the rag fixed to the shell 1 by the rag fixing device, so as to humidify the rag.

[0092] See also Figure 2 , 9 A flow control module 4 is provided between the water storage tank 21 and the dry and wet water tank 22, for controlling the conduction between the water storage tank 21 and the dry and wet water tank 22. The flow control module 4 includes an inlet pipe, an outlet pipe, a flow controller and a main controller. The inlet pipe is connected to the water storage tank 21, and the outlet pipe is connected to the dry and wet water tank 22. The flow controller is connected to the main controller, for controlling the conduction between the inlet pipe and the outlet pipe. The main controller is fixed on the bottom shell 11, and changes the connection time, connection time interval and water flow between the water storage tank 21 and the dry and wet water tank 22 by controlling the working state of the flow controller.

[0093] The liquid level column 33 includes a first liquid level column 33 and a second liquid level column 33, which are respectively arranged in the water storage tank 21 and the dry and wet water tank 22, and detect the water levels of the two water tanks 2 in real time and feed back to the liquid level detection module 31. At the same time, the flow control module 4 is connected to the liquid level detection module 31, and can receive a signal from the liquid level detection module 31, so as to change the conduction state between the water storage tank 21 and the dry and wet water tank 22 by changing the working state of the flow controller accordingly.

[0094] Water level control of the dryness and humidity water tank 22: When the liquid level detection module 31 detects that the water level in the dryness and humidity water tank 22 is too low or is about to leak out, the signal is fed back to the flow control module 4. After analysis, the flow control module 4 replenishes water to the dryness and humidity water tank 22; on the other hand, the maximum water level value of the dryness and humidity water tank 22 can also be set by the flow control module 4. When the liquid level detection module 31 detects that the water level in the dryness and humidity water tank 22 is higher than the maximum water level value, the signal is immediately fed back to the flow control module 4 to stop adding water.

[0095] Water level control of the water tank 21: the liquid level detection module 31 detects the water level in the water tank 21 in real time, and feeds back to the liquid level display module 32 for display; at the same time, when the liquid level detection module 31 detects that the water level in the dryness and humidity water tank 22 is higher or lower than the threshold, the signal is fed back to the liquid level display module 32 and the voice broadcast module 34 at the same time. While the water amount in the water tank 21 is displayed through the liquid level display module 32, a voice alarm is issued through the voice broadcast module 34, thereby reminding the user not to add too much water or to replenish water in time.

[0096] In this embodiment, the water storage tank 21 is arranged inside the dry and humid water tank 22, and a gap is provided between the bottom of the water storage tank 21 and the bottom of the dry and humid water tank 22. That is, the side wall height of the water storage tank 21 is lower than the side wall height of the dry and humid water tank 22, so that the water storage tank 21 can be completely arranged inside the dry and humid water tank 22, and the overall volume of the entire device is reduced without reducing the contact area between the dry and humid water tank 22 and the rag underneath, which is convenient for installation. In other embodiments, there is no restriction on the relative position between the water storage tank 21 and the dry and humid water tank 22.

[0097] Referring to 2, 10, and 11, a plurality of guide posts 221 are provided at the bottom of the dry and wet water tank 22, and a plurality of guide holes 211 are provided on the water storage tank 21. The water storage tank 21 is arranged in the dry and wet water tank 22 through the cooperation of the guide holes 211 and the guide posts 221. Through the cooperation of the guide posts 221 and the guide holes 211, the relative positions of the water storage tank 21 and the dry and wet water tank 22 are limited, so that the water storage tank 21 cannot shake at will, thereby improving the stability of the overall structure.

[0098] A limiting step is provided at the bottom of the guide post 221, and the outer diameter of the limiting step is larger than the diameter of the guide hole 211. When the water storage tank 21 is fixed in the dry and wet water tank 22 through the guide hole 211 and the guide post 221, the bottom of the water storage tank 21 is stuck on the limiting step due to the setting of the limiting step, so that there is a gap between the bottom of the water storage tank 21 and the bottom of the dry and wet water tank 22, which is used to store a small amount of water in the dry and wet water tank 22.

[0099] See also Figure 2 , 12 The dry and humid water tank 22 is provided with a box cover 222, and a water filling port 223 is provided on the box cover 222. The water filling port 223 is correspondingly arranged on the water storage tank 21, and is used to add water to the water storage tank 21. A water filling cover is provided on the upper cover 12. Since the water storage tank 21 is arranged inside the dry and humid water tank 22, the box cover 222 is arranged on the dry and humid water tank 22 so that the dry and humid water tank 22 and the water storage tank 21 can be covered at the same time, so that the water inside the two water tanks 2 is not easily polluted by dust or other debris, thereby reducing the possibility of clogging of the device.

[0100] At the same time, since the water filling port 223 is arranged above the water storage tank 21 , when adding water, there is no need to open the entire tank cover 222 . Only the water filling cover needs to be opened to add water to the water storage tank 21 through the water filling port 223 .

[0101] One end of the water adding cover is rotatably connected to the upper cover 12, and the other end is clamped with the upper cover 12. A spring is also provided on the water adding cover, so that the water adding cover can be propped up under the action of the spring after the clamping connection with the upper cover 12 is disconnected, and an angle is formed between the water adding cover and the upper cover 12.

[0102] See also Figure 2 This embodiment further includes a sealing member 5, which is arranged at the junction of the water tank 2 and the tank cover 222. The top edges of the water storage tank 21 and the dry and wet water tank 22 are connected, and the sealing member 5 is arranged along the edges of the water storage tank 21 and the dry and wet water tank 22, thereby reducing the possibility of water in the dry and wet water tank 22 and the water storage tank 21 leaking out.

[0103] In this embodiment, the box cover 222 and the sealing member 5 are fixed to the water storage tank 21 by screws. In other embodiments, they can also be fixed by colloid bonding.

[0104] The present embodiment also includes a walking device, which is arranged at the bottom of the bottom shell 11 and includes a universal wheel and a motor-driven wheel. Each motor-driven wheel is equipped with a driving motor, and the driving motor is connected to the main controller and can work under the control of the main controller.

[0105] See also Fig. 9, this embodiment also includes a position detection device 6, including an obstacle detector 61 and a suspension detector 62, both of which are connected to the main controller and can feed back signals to the main controller, so that the main controller can make corresponding adjustment commands and issue them to the walking device. The obstacle detector 61 is set on the bottom shell 11 and is used to detect obstacles. In this embodiment, the position detection device 6 is an infrared detection sensor, which is set on the side of the bottom shell 11. It can judge whether there are obstacles in the surrounding environment by reflecting infrared light, so as to prevent the mopping machine from hitting the wall. The suspension detector 62 is set at the bottom of the shell 1 of the mopping machine, and is used to detect whether the front is suspended, so as to prevent the mopping machine from accidentally falling.

[0106] This embodiment also includes an automatic charging device, which includes a charging seat and a searcher. The charging seat is provided with an infrared transmitter, and the searcher is arranged on the housing 1, which can automatically locate the position of the charging seat by searching for the signal emitted by the infrared transmitter on the charging seat, and feed the signal back to the main controller, so that the mopping machine can be automatically charged.

[0107] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A mopping machine, characterized in that: It includes a housing, a water tank, a liquid level detection device and a rag fixing device. The water tank is arranged on the housing and is used to store water for mopping the floor. The liquid level detection device includes a liquid level detection module and a liquid level display module. The liquid level detection module is arranged in the housing and is used to monitor the water level in the water tank in real time. The liquid level display module is fixed on the housing and is used to display the liquid level. The rag fixing device is arranged at the bottom of the housing and is used to fix the rag. A water seepage device is arranged at the bottom of the water tank and is used to guide the water in the water tank to the rag at the bottom of the housing. It also includes a voice broadcast module, the liquid level detection module is connected to the voice broadcast module, when the liquid level detection module detects that the liquid level to be measured is lower than or higher than a preset threshold, the voice broadcast module is controlled to issue a voice alarm; The shell includes a bottom shell and an upper cover, and the water tank includes a water storage tank and a dry and wet water tank; the dry and wet water tank is arranged on the shell, and the dry and wet water tank and the shell are an integrated structure, and the rag fixing device is arranged at the bottom of the dry and wet water tank; the water seepage device is arranged at the bottom of the dry and wet water tank, and is used to guide the water in the dry and wet water tank to the rag; The water storage tank is arranged inside the dry and wet water tank, and a gap is arranged between the bottom of the water storage tank and the bottom of the dry and wet water tank, that is, the height of the side wall of the water storage tank is lower than the height of the side wall of the dry and wet water tank; A flow control module is provided between the water storage tank and the dry and wet water tank, and is used to control the conduction between the water storage tank and the dry and wet water tank; the flow control module includes an inlet pipe, an outlet pipe, a flow controller and a main controller; the inlet pipe is connected to the water storage tank, and the outlet pipe is connected to the dry and wet water tank; the flow controller is connected to the main controller, and is used to control the conduction between the inlet pipe and the outlet pipe; the main controller is fixed on the bottom shell, and changes the connection time, connection time interval and water flow between the water storage tank and the dry and wet water tank by controlling the working state of the flow controller; The liquid level detection device also includes a liquid level column, which includes a first liquid level column and a second liquid level column, which are respectively arranged in the water storage tank and the dry and wet water tank, and the water levels of the two water tanks are detected in real time and fed back to the liquid level detection module; at the same time, the flow control module is connected to the liquid level detection module, and can receive a signal from the liquid level detection module, so as to change the conduction state between the water storage tank and the dry and wet water tank by changing the working state of the flow controller accordingly; Water level control of the dry and humid water tank: When the liquid level detection module detects that the water level in the dry and humid water tank is too low or about to leak out, the signal is fed back to the flow control module, and the flow control module replenishes the dry and humid water tank after analysis; on the other hand, the maximum water level value of the dry and humid water tank can also be set through the flow control module. When the liquid level detection module detects that the water level in the dry and humid water tank is higher than the maximum water level value, the signal is immediately fed back to the flow control module to stop adding water; Water level control of the water tank: the liquid level detection module detects the water level in the water tank in real time and feeds it back to the liquid level display module for display; at the same time, when the liquid level detection module monitors that the water level in the water tank is higher or lower than the threshold, the signal is fed back to the liquid level display module and the voice broadcast module at the same time. While the water amount in the water tank is displayed through the liquid level display module, a voice alarm is issued through the voice broadcast module, thereby reminding the user not to add too much water or to replenish water in time.

2. The mopping machine according to claim 1, characterized in that: The liquid level detection module is provided with a liquid level detection end, and the liquid level column is connected to the liquid level detection end; The liquid level column includes a conductor core, which is immersed in the liquid to be measured to form a capacitor with the liquid to be measured. The inductive capacitance value of the capacitor changes with the depth of the conductor core immersed in the liquid to be measured. The liquid level detection module measures the inductive capacitance value of the conductor core through the liquid level detection end, and obtains the depth of the conductor core immersed in the liquid to be measured according to the measured inductive capacitance value, thereby obtaining the liquid level height of the liquid to be measured.

3. The mopping machine according to claim 2, characterized in that: The liquid level column also includes an insulating layer, which is wrapped around the outer wall of the conductor core.

4. The mopping machine according to claim 2, characterized in that: The liquid level detection module is also provided with a display control terminal, which is connected to the liquid level display module. The liquid level detection module sends a display instruction to the liquid level display module through the display control terminal, and the liquid level display module displays the measured liquid level height.

5. The mopping machine according to claim 4, characterized in that: The liquid level display module includes a display panel, on which a plurality of indicator lights are arranged, each of which is connected to the display control end, and the liquid level detection module indicates different liquid level heights by controlling the number of indicator lights on the display panel.

6. The mopping machine according to claim 5, characterized in that: The liquid level display module includes a display screen, which is connected to the display control terminal. The liquid level detection module sends a display instruction to the display screen in real time through the display control terminal, and the display screen displays the current liquid level value according to the display instruction.

7. The mopping machine according to claim 1, characterized in that: It also includes a control device and a walking device. The control device is arranged in the shell and is used to control the movement of the walking device. The walking device is arranged at the bottom of the shell and includes a universal wheel, a driving wheel and a driving motor. The driving motor is controlled by the control device to change the movement state of the driving wheel.

8. The mopping machine according to claim 7, characterized in that: It also includes a position detection device, which includes an obstacle detector and a suspension detector, and both are connected to the control device for feeding back signals to the control device.

9. The mopping machine according to claim 1, characterized in that: It also includes a sealing member. The water tank includes a tank body and a tank cover. The sealing member is arranged at the junction of the tank body and the tank cover.

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