Base station and scrubber

Abstract

The invention relates to a base station and a scrubber, the base station comprises a sewage tank and a positive and negative pressure assembly, the sewage tank is provided with a sewage outlet, and the positive and negative pressure assembly comprises a fan, a communication pipeline, a valve, a driving motor and a linkage mechanism. The communication pipeline is communicated with the sewage tank and is provided with a first communication port and a second communication port. The valves comprise the first valve, the second valve and the third valve, the first valve is arranged at the first communication port in an openable and closable mode, and the first communication port is configured to be communicated with an air suction port of the fan when opened. The second valve is arranged at the second communication port in an openable and closable mode, and the second communication port is configured to be communicated with the exhaust port of the fan when being opened. And the third valve is arranged at the drain outlet in an openable and closable manner. The driving motor is in transmission connection with the first valve, the second valve and the third valve through a linkage mechanism. According to the base station, the driving motors drive the multiple valves through the linkage mechanisms, the number of the motors and the number of related assembly parts are reduced, and the structure of the positive and negative pressure assembly used for controlling positive and negative pressure is simpler.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a base station and a floor scrubber. Background Art

[0002] In order to make the floor scrubber work more automatically, some floor scrubbers include a floor scrubber body and a base station that cooperates with it. The floor scrubber body can go to the base station for cleaning or charging after completing the cleaning work. During the cleaning process, the base station of the floor scrubber must complete the extraction and discharge of sewage from the floor scrubber body. That is, it is necessary to generate negative pressure through the base station to extract the sewage from the sewage box of the floor scrubber body into the sewage tank of the base station, and then generate a sufficiently large positive pressure through the base station to open the sewer valve to discharge the sewage in the sewage tank of the base station into the sewer.

[0003] In the related art, in order to generate negative pressure, positive pressure and sewage discharge, multiple valve mechanisms are required, and a motor is configured for each valve mechanism accordingly to drive each valve to open and close. However, the structure and control of such a base station are relatively complex, with a large number of parts and high cost. Summary of the invention

[0004] Based on this, it is necessary to provide a base station and a floor scrubber with a simpler positive and negative pressure control structure to address the above-mentioned problems.

[0005] A base station, comprising a sewage tank and a positive and negative pressure component, wherein the sewage tank has a sewage outlet, and the positive and negative pressure component comprises:

[0006] Fan;

[0007] A communication pipe connected to the sewage tank and having a first communication port and a second communication port;

[0008] The valve comprises a first valve, a second valve and a third valve, wherein the first valve is openably and closably arranged at the first communication port, and the first communication port is configured to communicate with the air intake port of the fan when opened; the second valve is openably and closably arranged at the second communication port, and the second communication port is configured to communicate with the air exhaust port of the fan when opened; the third valve is openably and closably arranged at the sewage outlet; and

[0009] A driving motor and a linkage mechanism, wherein the driving motor is connected to the first valve, the second valve and the third valve through the linkage mechanism.

[0010] The above-mentioned base station has a positive and negative pressure component configured with a single drive motor. This drive motor can be linked to the first valve, the second valve and the third valve through a linkage mechanism, that is, the driving of multiple valves is achieved through a single motor, which reduces the number of motors and related assembly parts. The structure of the positive and negative pressure components used to control positive and negative pressure is simpler, which is also conducive to reducing assembly time. At the same time, it can also optimize the space within the base station and reduce costs.

[0011] In one embodiment, the linkage mechanism has a first state, a second state and a third state, and is configured to be able to switch between the first state, the second state and the third state under the drive of the drive motor;

[0012] In the first state, the linkage mechanism drives the first valve to open the first connecting port, drives the second valve to close the second connecting port, and drives the third valve to close the sewage outlet; in the second state, the linkage mechanism drives the first valve to close the first connecting port, drives the second valve to open the second connecting port, and drives the third valve to close the sewage outlet; in the third state, the linkage mechanism drives the first valve to close the first connecting port, drives the second valve to open the second connecting port, and drives the third valve to open the sewage outlet.

[0013] In this way, when the linkage mechanism is in the first state, the fan starts, its air intake port is connected to the connecting pipe through the first connecting port, and suction is generated at the first positive and negative pressure air outlet, and the exhaust port exhausts air at the air outlet of the casing; the first positive and negative pressure air outlet is connected to the sewage tank through the positive and negative pressure bellows, the sewage tank and the sewage box of the floor scrubber body are connected through the sewage extraction bellows, and the sewage in the sewage box of the floor scrubber body is extracted into the sewage tank by negative pressure. When the linkage mechanism is in the second state, the fan starts, its air intake port inhales gas from the air inlet of the casing, the exhaust port is connected to the second connecting port, and exhaust is generated at the first positive and negative pressure air outlet, and the sewage tank is pressurized to gather gas. When the linkage mechanism is in the third state, the pressurized gas in the sewage tank is used to discharge sewage, so that enough gas is gathered in the sewage tank to discharge sewage instantly, and the sewage in the sewage tank is discharged into the sewer through the outlet of its lower shell.

[0014] In one embodiment, the valve is configured to be able to flip around its respective flip axis to achieve opening and closing;

[0015] The linkage mechanism includes a transmission part and three driving shafts, the three driving shafts are respectively connected to the first valve, the second valve and the third valve, and are parallel to and spaced apart from the flip axes of the connected valves; the transmission part is transmission-connected to the drive motor, and is configured to be able to drive the three driving shafts to rotate around the flip axes of the connected valves under the drive of the drive motor.

[0016] In this way, the valve can open and close each through hole by flipping, and the opening and closing method is simple and easy to drive. When the drive shaft rotates around the flip axis under drive, the valve can be driven to flip accordingly. The drive shaft can convert the flip of the valve into its displacement so as to drive the motor. On this basis, the flip of the valve can be controlled accordingly by simply controlling the displacement path of the drive shaft.

[0017] In one embodiment, the transmission part is a slider, the slider has a first position, a second position and a third position sequentially arranged along a first direction, and is configured to be able to move along the first direction under the drive of the drive motor; when the slider is in the first position, the linkage mechanism is in the first state; when the slider is in the second position, the linkage mechanism is in the second state; when the slider is in the third position, the linkage mechanism is in the third state;

[0018] The flip axis intersects with the first direction, the slider has three sliding grooves, the three driving shafts are respectively at least partially located in the three sliding grooves and can slide along the sliding grooves; the transmission groove includes a driving section and a non-driving section, the driving section extends along a direction intersecting the first direction, and the non-driving section extends along the first direction;

[0019] During the movement of the slider from the first position to the second position, the drive shaft connected to the first valve is in the drive section, the drive shaft connected to the second valve is in the drive section, and the drive shaft connected to the third valve is in the non-drive section; during the movement of the slider from the second position to the third position, the drive shaft connected to the first valve is in the non-drive section, the drive shaft connected to the second valve is in the non-drive section, and the drive shaft connected to the third valve is in the drive section.

[0020] In this way, the movement of the slider corresponds to the state of the linkage mechanism, and the driving motor only needs to linearly drive the slider to move to achieve control of the linkage mechanism state. During the movement of the slider from the first position to the second position: the first valve is flipped under the drive of the driving section, and flips from opening the first connecting port and closing the air inlet of the casing to closing the first connecting port and opening the air inlet of the casing; the second valve is flipped under the drive of the driving section, and flips from closing the second connecting port and opening the air outlet of the casing to opening the second connecting port and closing the air outlet of the casing; the third valve does not move. During the movement of the slider from the second position to the third position: the first valve and the second valve do not move; the third valve is flipped under the drive of the driving section, and flips from closing the sewage outlet to opening the sewage outlet. The linkage mechanism realizes the control of three valves with different motion states through different sliding grooves on the slider.

[0021] In one embodiment, the positive and negative pressure assembly also includes a first detection switch, a second detection switch and a third detection switch, and the first detection switch, the second detection switch and the third detection switch are sequentially arranged along the first direction on the moving path of the slider, the first detection switch is configured to be triggered when the slider is in the first position, the second detection switch is configured to be triggered when the slider is in the second position, and the third detection switch is configured to be triggered when the slider is in the third position.

[0022] In this way, the slider can trigger the first detection switch, the second detection switch, and the third detection switch respectively when it moves to the first position, the second position, and the third position. Accordingly, if the first detection switch is triggered, it means that the slider moves to the first position, if the second detection switch is triggered, it means that the slider moves to the second position, and if the third detection switch is triggered, it means that the slider moves to the third position. According to the triggering conditions of each detection switch, it can be known whether the slider moves to the specified position, and the drive motor can be controlled accordingly to continue driving.

[0023] In one embodiment, the positive and negative pressure assembly further includes a threaded rod and a threaded mating piece, wherein the threaded rod is axially arranged along the first direction and is drivingly connected to the drive motor, and the threaded mating piece is threadably mated with the threaded rod and connected to the slider.

[0024] In this way, the threaded rod can rotate under the drive of the driving motor, and thereby drive the threaded fitting that matches with it to move up and down, and correspondingly, the sliding block connected to the threaded fitting also moves up and down accordingly.

[0025] In one embodiment, the positive and negative pressure assembly also includes a pressure plate and a bearing, wherein the pressure plate is fixedly arranged relative to the connecting pipe, one end of the threaded rod is transmission-connected to the drive motor, and the other end is rotatably connected to the pressure plate through the bearing; in this way, both ends of the threaded rod are supported to improve its stability during rotation.

[0026] And / or, the driving motor is configured to be able to drive the threaded rod to rotate along a first turn and a second turn around its axial direction, respectively, and the first turn is opposite to the second turn. In this way, the driving motor can drive the threaded rod to rotate along the first turn around its axial direction to drive the slider to move downward along the first direction, and the driving motor can also drive the threaded rod to rotate along the second turn around its axial direction to drive the slider to move upward along the first direction, so that the slider can move in the directions of the first position, the second position and the third position, and can also move in the directions of the third position, the second position and the first position, thereby realizing reciprocating movement. After the slider reaches the third position from the first position and the second position, it can also return to the first position as the initial position.

[0027] In one embodiment, the positive and negative pressure component also includes a casing, the fan is disposed in the casing, the casing has an air inlet and an air outlet, the first valve is configured to be able to selectively cover one of the first connecting port and the air inlet, and the air inlet is configured to be connected to the air intake port of the fan when opened; the second valve is configured to be able to selectively cover one of the second connecting port and the air outlet, and the air outlet is configured to be connected to the exhaust port of the fan when opened.

[0028] In this way, the air inlet on the casing and the first connecting port of the connecting pipe can be selectively connected to the air intake port of the fan, and the air outlet on the casing and the second connecting port of the connecting pipe can be selectively connected to the exhaust port of the fan, so that when the first connecting port or the second connecting port is closed, the fan can still inhale air through the air inlet and exhaust air through the air outlet. At the same time, the negative pressure or positive pressure generated by the fan through its air intake port or exhaust port can also be more fully transmitted to the connecting pipe.

[0029] In one embodiment, the positive and negative pressure assembly further includes a casing, and the fan is disposed in the casing; the base station further includes an ozone generator and a blower, the output port of the ozone generator is connected to the casing, and the blower is connected to the casing.

[0030] In this way, after the sewage is discharged, the slider can remain in the third position, and after the blower is started, the ozone generator releases ozone and transports it to the fluids and fans in the base station for deodorization and sterilization, and finally discharges the ozone into the sewer. After the ozone deodorization and sterilization, the drive motor starts the motor shaft thread in the reverse direction to drive the slider upward to the first position of the initial state through the threaded mating part.

[0031] A floor scrubber comprises the above-mentioned base station.

[0032] The above-mentioned floor scrubber has a positive and negative pressure component configured with a single drive motor. This drive motor can be linked to the first valve, the second valve and the third valve through a linkage mechanism, that is, the driving of multiple valves is achieved through a single motor, which reduces the number of motors and related assembly parts. The structure of the positive and negative pressure components used to control positive and negative pressure is simpler, which is also conducive to reducing assembly time. At the same time, it can also optimize the space in the base station and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 Schematic diagram of the structure of a base station in one embodiment of the present application.

[0035] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a base station is shown.

[0036] Figure 3 for Figure 1 A schematic diagram of the partial structural decomposition of a base station is shown.

[0037] Figure 4 for Figure 1 Another part of the structure of the base station is shown in the schematic diagram of the decomposed structure.

[0038] Figure 5 for Figure 1 The cross-sectional structural schematic diagram of the base station is shown when the positive and negative pressure components in the base station are in the negative pressure sewage pumping state.

[0039] Figure 6 for Figure 1 The cross-sectional structural schematic diagram of the base station is shown when the positive and negative pressure components in the base station are in a positive pressure maintaining state.

[0040] Figure 7 for Figure 1 The cross-sectional structural schematic diagram of the base station is shown when the positive and negative pressure components in the base station are in a positive pressure sewage discharge state.

[0041] Figure 8 for Figure 1 A partial structural diagram of a base station is shown.

[0042] Fig. 9 for Figure 1 The schematic diagram of a part of the structure of the base station is shown when the middle slider of the base station is in the first position.

[0043] Fig.10 for Figure 1 The diagram is a partial structural diagram of a base station when the middle slider of the base station is in the second position.

[0044] Fig.11 for Figure 1 The schematic diagram of a part of the structure of the base station is shown when the middle slider of the base station is in the third position.

[0045] Fig.12 for Figure 1 The schematic diagram of another part of the structure of the base station is shown when the middle slider of the base station is in the first position.

[0046] Fig.13 for Figure 1 The schematic diagram of another part of the structure of the base station is shown when the middle slider of the base station is in the second position.

[0047] Fig.14 for Figure 1 The schematic diagram of another part of the structure of the base station when the middle slider of the base station is in the third position is shown.

[0048] Fig.15 for Figure 1 The schematic diagram of another part of the structure of the base station is shown when the middle slider of the base station is in the first position.

[0049] Fig.16 for Figure 1 The schematic diagram of another part of the structure of the base station when the middle slider of the base station is in the second position is shown.

[0050] Fig.17 for Figure 1 The schematic diagram of another part of the structure of the base station when the middle slider of the base station is in the third position is shown.

[0051] Fig.18 Schematic diagram of the working steps of a floor scrubber in one embodiment of the present application.

[0052] Description of the accompanying drawings: 100, base station; 10, sewage tank; 11, sewage outlet; 12, second positive and negative pressure air outlet; 13, third positive and negative pressure air outlet; 14, upper shell; 15, lower shell; 151, outlet; 20, positive and negative pressure assembly; 21, fan; 211, air intake; 212, exhaust; 22, connecting pipe; 221, first connecting port; 222, second connecting port; 223, first positive and negative pressure air outlet; 224, upper shell of the pipe; 225, lower shell of the pipe; 231, first valve; 232, second valve; 233, third valve; 234, door body sealing ring; 235, door body; 236, retaining spring; 24, drive motor; 241, motor cover; 242, threaded rod; 243, threaded fitting; 244. Press plate; 245. Bearing; 25. Linkage mechanism; 251. Slider; 2511. Sliding groove; 2512. Driving section; 2513. Non-driving section; 252. Driving shaft; 253. Connecting part; 261. First detection switch; 262. Second detection switch; 263. Third detection switch; 27. PCB board; 28. Casing; 281. Air inlet; 282. Air outlet; 283. Upper shell; 284. Lower shell; 285. Sponge ring; 29. ​​Positive and negative pressure bellows; 210. Positive and negative pressure sealing ring seal; 220. Sewage extraction bellows; 230. First sealing ring; 240. Second sealing ring; 250. Third sealing ring; 30. Ozone generator; 40. Blower; 41. Mounting cover. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0054] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore it should not be understood as a limitation on the present application.

[0055] In addition, if the term "and / or" appears, "and / or" is merely a way to describe the association relationship between associated objects, and indicates that three relationships may exist, for example, A and / or B can represent the association relationship between A and B: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that there is an "or" relationship between the associated objects before and after it. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, four, five, etc., unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0059] See also Figures 1 to 7The base station 100 provided in one embodiment of the present application includes a sewage tank 10 and a positive and negative pressure assembly 20, wherein the sewage tank 10 has a sewage outlet 11, and the positive and negative pressure assembly 20 includes a fan 21, a connecting pipe 22, a valve, a drive motor 24, and a linkage mechanism 25. The connecting pipe 22 is connected to the sewage tank 10 and has a first connecting port 221 and a second connecting port 222. The valve includes a first valve 231, a second valve 232, and a third valve 233. The first valve 231 can be opened and closed at the first connecting port 221, and the first connecting port 221 is configured to be connected to the air intake port 211 of the fan 21 when it is opened. The second valve 232 can be opened and closed at the second connecting port 222, and the second connecting port 222 is configured to be connected to the air exhaust port 212 of the fan 21 when it is opened. The third valve 233 can be opened and closed at the sewage outlet 11. The driving motor 24 is connected to the first valve 231 , the second valve 232 and the third valve 233 through the linkage mechanism 25 .

[0060] In one embodiment, the base station 100 is used for a floor scrubber and can clean and charge the floor scrubber body (not shown) of the floor scrubber. When cleaning the floor scrubber, the base station 100 can form a negative pressure to suck the sewage in its sewage box into the sewage tank 10, and further discharge it outward through the sewage outlet 11 of the sewage tank 10. It can be understood that the base station 100 can also be used for a sweeper, a washing and drying machine, etc., which is not specifically limited here.

[0061] The communication pipe 22 also has a first positive and negative pressure air port 223, and the sewage tank 10 also has a second positive and negative pressure air port 12. The communication pipe 22 is connected to the sewage tank 10 through the first positive and negative pressure air port 223 and the second positive and negative pressure air port 12. Specifically, the sewage tank 10 also includes an upper shell 14 and a lower shell 15 connected to each other, the sewage outlet 11 is located at the bottom of the upper shell 14, and the upper shell 14 can be connected to the lower shell 15 through the sewage outlet 11, and the airflow or sewage of the upper shell 14 can enter the lower shell 15 through the sewage outlet 11 and be discharged outward from the outlet 151 of the lower shell 15, and the outlet 151 of the lower shell 15 can be connected to the sewer.

[0062] The positive and negative pressure assembly 20 also includes a positive and negative pressure bellows 29 and a sewage extraction bellows 220. One end of the positive and negative pressure bellows 29 is connected to the first positive and negative pressure air port 223, and the other end is connected to the second positive and negative pressure air port 12, that is, the connecting pipe 22 is connected to the sewage tank 10 through the positive and negative pressure bellows 29. The sewage tank 10 also has a third positive and negative pressure air port 13, and the second positive and negative pressure air port 12 and the third positive and negative pressure air port 13 are both located at the upper part of the upper shell 14. One end of the sewage extraction bellows 220 is connected to the second positive and negative pressure air port 12, and the other end is used to connect to the sewage box of the floor scrubber body.

[0063] The base station 100 includes three valves including a first valve 231, a second valve 232 and a third valve 233. The first valve 231 can control the opening and closing of the first connecting port 221, the second valve 232 can control the opening and closing of the second connecting port 222, and the third valve 233 can control the opening and closing of the sewage outlet 11. In addition, each valve is also provided with a door body sealing ring 234 to improve its sealing when closed. It can be understood that in order to make the fan 21 work normally, positive pressure or negative pressure can be formed in the connecting pipe 22, and the first connecting port 221 and the second connecting port 222 are opened selectively. In other words, the first valve 231 and the second valve 232 act synchronously, but the opening and closing states of each relative to the first connecting port 221 and the second connecting port 222 are configured to be opposite, that is, when the first valve 231 opens the first connecting port 221, the second valve 232 closes the second connecting port 222, and when the first valve 231 closes the first connecting port 221, the second valve 232 opens the second connecting port 222. When the third valve 233 opens the sewage outlet 11 , the sewage tank 10 can discharge sewage to the outside.

[0064] The positive and negative pressure assembly 20 includes a positive and negative pressure bellows 29, a positive and negative pressure sealing ring seal 210, and a sewage extraction bellows 220. The connecting pipe 22 is connected to the sewage tank 10 via the positive and negative pressure bellows 29. The connecting pipe 22 and the positive and negative pressure bellows 29 are sealed with a positive and negative pressure sealing ring 210. The sewage tank 10 is connected to the sewage box of the floor scrubber body via the sewage extraction bellows 220.

[0065] In this way, when the first valve 231 opens the first communication port 221 and the second valve 232 closes the second communication port 222, the communication pipe 22 is connected to the air inlet 211 of the fan 21 through the first communication port 221, and negative pressure is formed therein, which can be transmitted to the sewage tank 10 through the positive and negative pressure bellows 29, so that the sewage tank 10 can extract the sewage in the sewage box of the floor scrubber body through the sewage extraction bellows 220. It can be understood that the third valve 233 can close the sewage outlet 11 at this time. When the first valve 231 closes the first communication port 221 and the second valve 232 opens the second communication port 222, the communication pipe 22 is connected to the exhaust port 212 of the fan 21 through the second communication port 222, and positive pressure is formed therein, which can be transmitted to the sewage tank 10 through the positive and negative pressure bellows 29, so that the sewage tank 10 can form a pressure for sewage discharge, and the third valve 233 opens the sewage outlet 11 when sewage discharge is required.

[0066] The above-mentioned base station 100, its positive and negative pressure assembly 20 is configured with a single driving motor 24, and this driving motor 24 can be linked to the first valve 231, the second valve 232 and the third valve 233 through the linkage mechanism 25, that is, the driving of multiple valves is achieved through a single motor, which reduces the number of motors and related assembly parts, and makes the structure of the positive and negative pressure assembly 20 for controlling positive and negative pressure simpler, which is also beneficial to reducing assembly time. At the same time, it can also optimize the space inside the base station 100 and reduce costs.

[0067] In some embodiments, the positive and negative pressure assembly 20 also includes a casing 28, the fan 21 is disposed in the casing 28, the casing 28 has an air inlet 281 and an air outlet 282, the first valve 231 is configured to be able to selectively cover one of the first connecting port 221 and the air inlet 281, the air inlet 281 is configured to be connected to the air intake 211 of the fan 21 when opened; the second valve 232 is configured to be able to selectively cover one of the second connecting port 222 and the air outlet 282, the air outlet 282 is configured to be connected to the exhaust port 212 of the fan 21 when opened.

[0068] The air inlet 281 of the housing 28 is disposed near the first communication port 221, and the first valve 231 can move between the air inlet 281 and the first communication port 221, and selectively cover both. The air outlet 282 of the housing 28 is disposed near the second communication port 222, and the second valve 232 can move between the air outlet 282 and the second communication port 222, and selectively cover both.

[0069] The first valve 231 is configured to cover one of the first communication port 221 and the air inlet 281, which means that when the first valve 231 is covered on the first communication port 221, the air inlet 281 is opened, and when the first valve 231 is covered on the air inlet 281, the first communication port 221 is opened. The second valve 232 is configured to cover one of the second communication port 222 and the air outlet 282, which means that when the second valve 232 is covered on the second communication port 222, the air outlet 282 is opened, and when the second valve 232 is covered on the air outlet 282, the second communication port 222 is opened.

[0070] In this way, the air inlet 281 on the casing 28 and the first connecting port 221 of the connecting pipe 22 can be selectively connected to the air intake port 211 of the fan 21, and the air outlet 282 on the casing 28 and the second connecting port 222 of the connecting pipe 22 can be selectively connected to the exhaust port 212 of the fan 21, so that when the first connecting port 221 or the second connecting port 222 of the fan 21 is closed, the fan 21 can still inhale air through the air inlet 281 and exhaust air through the air outlet 282. At the same time, the negative pressure or positive pressure generated by the fan 21 through its air intake port 211 or exhaust port 212 can also be more fully transmitted to the connecting pipe 22.

[0071] Furthermore, the positive and negative pressure assembly 20 further includes a first sealing ring 230, a second sealing ring 240 and a third sealing ring 250, wherein the first sealing ring 230 is sealed between the air inlet 211 of the fan 21 and the housing 28, the second sealing ring 240 is sealed between the air outlet 212 of the fan 21 and the housing 28, and the third sealing ring 250 is sealed between the bottom of the fan 21 and the bottom of the lower shell 284. Specifically, the housing 28 includes an upper shell 283 and a lower shell 284, wherein the upper shell 283 has a first positioning groove for assembling the first sealing ring 230 and forming an air inlet 281, and the fan 21 has a second positioning groove for assembling the second sealing ring 240. In addition, the lower shell 284 may also be composed of multiple parts.

[0072] In this way, the first sealing ring 230 , the second sealing ring 240 and the third sealing ring 250 can enhance the sealing between the fan 21 and the housing.

[0073] Please also read Figure 2 In some embodiments, the linkage mechanism 25 has a first state, a second state, and a third state, and is configured to be switchable among the first state, the second state, and the third state under the drive of the drive motor 24 .

[0074] In the first state, the linkage mechanism 25 drives the first valve 231 to open the first connecting port 221, drives the second valve 232 to close the second connecting port 222, and drives the third valve 233 to close the sewage outlet 11; in the second state, the linkage mechanism 25 drives the first valve 231 to close the first connecting port 221, drives the second valve 232 to open the second connecting port 222, and drives the third valve 233 to close the sewage outlet 11; in the third state, the linkage mechanism 25 drives the first valve 231 to close the first connecting port 221, drives the second valve 232 to open the second connecting port 222, and drives the third valve 233 to open the sewage outlet 11.

[0075] The linkage mechanism 25 is in the first state, the second state and the third state, which correspond to the three states of the positive and negative pressure components 20, respectively. When the linkage mechanism 25 is in the first state, the positive and negative pressure components 20 are in the negative pressure sewage pumping state, and a negative pressure sewage pumping air duct (such as Figure 5 When the linkage mechanism 25 is in the second state, the positive and negative pressure components 20 are in a positive pressure holding state, and a positive pressure holding air duct is formed in the base station 100 (such as Figure 6 When the linkage mechanism 25 is in the third state, the positive and negative pressure components 20 are in the positive pressure sewage discharge state (as shown by the arrow in the middle), the positive pressure maintenance work is performed; when ... Figure 7 As shown by the arrow in the middle, a positive pressure exhaust air duct is formed in the base station 100 to perform positive pressure exhaust work. The first state may be an initial state.

[0076] Thus, when the linkage mechanism 25 is in the first state, the fan 21 is started, its air intake port 211 is connected with the connecting pipe 22 through the first connecting port 221, and suction is generated at the first positive and negative pressure air port 223, and the exhaust port 212 exhausts air at the air outlet 282 of the housing 28; the first positive and negative pressure air port 223 is connected with the sewage tank 10 through the positive and negative pressure bellows 29, and the sewage tank 10 is connected with the sewage box of the floor scrubber body through the sewage extraction bellows 220, and the sewage in the sewage box of the floor scrubber body is extracted into the sewage tank 10 by negative pressure. When the linkage mechanism 25 is in the second state, the fan 21 is started, its air intake port 211 sucks gas from the air inlet 281 of the housing 28, the exhaust port 212 is connected with the second connecting port 222, and exhaust is generated at the first positive and negative pressure air port 223, and the sewage tank 10 is pressurized to gather gas. When the linkage mechanism 25 is in the third state, the pressurized gas in the sewage tank 10 is used to discharge sewage, so that enough gas is accumulated in the sewage tank 10 to discharge sewage instantly, and the sewage in the sewage tank 10 is discharged into the sewer through the outlet 151 of the lower shell 15 thereof.

[0077] In some embodiments, the valves are configured to be able to flip around their respective flip axes to achieve opening and closing.

[0078] Specifically, the first valve 231 can rotate between the first communication port 221 and the air inlet 281, and its two sides are respectively used to cover the first communication port 221 and the air inlet 281. The second valve 232 can rotate between the second communication port 222 and the air outlet 282, and its two sides are respectively used to cover the second communication port 222 and the air outlet 282. Door body sealing rings 234 are provided on both sides of the first valve 231 and the second valve 232.

[0079] In this way, the valve can open and close each through hole by turning over, and the opening and closing method is simple and easy to drive. In some other embodiments, the valve can also be opened and closed by translation, rotation, etc., which are not specifically limited here.

[0080] Furthermore, the linkage mechanism 25 includes a transmission part and three drive shafts 252. The three drive shafts 252 are respectively connected to the first valve 231, the second valve 232 and the third valve 233, and are parallel to and spaced from the flip axes of the connected valves. The transmission part is connected to the drive motor 24, and is configured to be able to drive the three drive shafts 252 to rotate around the flip axes of the connected valves under the drive of the drive motor 24.

[0081] It can be understood that the linkage mechanism 25 may further include a connecting portion 253, and the driving shaft 252 is connected to the flip axis of the corresponding valve through the connecting portion 253, and is stopped in the direction of rotation around the flip axis.

[0082] Specifically, the valve includes a door body 235, a flip shaft and a retaining spring 236. The door body 235 and the flip shaft can be connected in one piece. The drive shaft 252 can be connected in one piece with the connecting portion 253. The connecting portion 253 can have an axial hole and can be anti-rotationally matched with the flip shaft through the axial hole. The valve is flipped by the flip shaft, and the axis of the flip shaft is the flip axis.

[0083] In this way, when the driving shaft 252 is driven to rotate around the flip axis, the valve can be flipped accordingly, and the driving shaft 252 can convert the flipping of the valve into its displacement so as to drive the motor 24. On this basis, the flipping of the valve can be controlled accordingly by simply controlling the displacement path of the driving shaft 252.

[0084] Please also read Figures 8 to 17 Furthermore, the transmission part is a slider 251, and the slider 251 has a first direction (such as Figure 5 The first position, the second position and the third position are sequentially arranged in the X direction (as shown in the figure), and is configured to be able to move along the first direction under the drive of the drive motor 24 to switch between the first position, the second position and the third position.

[0085] When the slider 251 is in the first position, the linkage mechanism 25 is in the first state; when the slider 251 is in the second position, the linkage mechanism 25 is in the second state; when the slider 251 is in the third position, the linkage mechanism 25 is in the third state. The driving shaft 252 intersects with the first direction.

[0086] It can be understood that the first direction, ie the moving direction of the slider 251, intersects with the flip axis. For ease of understanding, the first direction can be the gravity direction, and the first position, the second position and the third position are arranged sequentially from top to bottom.

[0087] The slider 251 may be disposed on one side of the connecting pipe 22 . The connecting pipe 22 has a guide groove for guiding the slider 251 to slide up and down. In addition, a positioning rib is disposed in the guide groove for limiting the slider 251 in a first direction to form its moving range.

[0088] In this way, the movement of the slider 251 corresponds to the state of the linkage mechanism 25 , and the driving motor 24 can control the state of the linkage mechanism 25 only by linearly driving the slider 251 to move.

[0089] Furthermore, the slider 251 has three sliding grooves 2511, and the three driving shafts 252 are at least partially located in the three sliding grooves 2511 respectively and can slide along the sliding grooves 2511. The transmission groove includes a driving section 2512 and a non-driving section 2513, the driving section 2512 extends along a direction intersecting the first direction, and the non-driving section 2513 extends along the first direction. When the slider 251 moves from the first position to the second position, the driving shaft 252 connected to the first valve 231 is in the driving section 2512, the driving shaft 252 connected to the second valve 232 is in the driving section 2512, and the driving shaft 252 connected to the third valve 233 is in the non-driving section 2513; when the slider 251 moves from the second position to the third position, the driving shaft 252 connected to the first valve 231 is in the non-driving section 2513, the driving shaft 252 connected to the second valve 232 is in the non-driving section 2513, and the driving shaft 252 connected to the third valve 233 is in the driving section 2512.

[0090] Since the driving section 2512 intersects with the first direction, when the slider 251 moves along the first direction, it can generate a driving force perpendicular to the side wall of the driving shaft 252 located therein, thereby driving the driving shaft 252 to rotate around the flip axis. Since the non-driving section 2513 is parallel to the first direction, when the slider 251 moves along the first direction, it will not generate a driving force on the driving shaft 252 located therein, thereby not driving the driving shaft 252 to rotate around the flip axis. One end of the driving shaft 252 is located in the sliding groove 2511 and is axially limited by the retaining spring 236 so that it is stably located in the sliding groove 2511.

[0091] Thus, when the slider 251 moves from the first position to the second position: the first valve 231 is turned over by the driving section 2512, and turns from opening the first connecting port 221 and closing the air inlet 281 of the housing 28 to closing the first connecting port 221 and opening the air inlet 281 of the housing 28; the second valve 232 is turned over by the driving section 2512, and turns from closing the second connecting port 222 and opening the air outlet 282 of the housing 28 to opening the second connecting port 222 and closing the air outlet 282 of the housing 28; the third valve 233 does not move. When the slider 251 moves from the second position to the third position: the first valve 231 and the second valve 232 do not move; the third valve 233 is turned over by the driving section 2512, and turns from closing the sewage outlet 11 to opening the sewage outlet 11. The linkage mechanism 25 controls three valves with different motion states through different sliding grooves 2511 on the slider 251 .

[0092] In some other embodiments, the valve may also be driven by gear transmission, and the circumference of the gear may include toothed areas and toothless areas, and achieve an effect similar to that of the driving section 2512 and the non-driving section 2513, which is not specifically limited here.

[0093] In some embodiments, the positive and negative pressure assembly 20 also includes a first detection switch 261, a second detection switch 262 and a third detection switch 263. The first detection switch 261, the second detection switch 262 and the third detection switch 263 are sequentially arranged along the first direction on the moving path of the slider 251. The first detection switch 261 is configured to be triggered when the slider 251 is in the first position, the second detection switch 262 is configured to be triggered when the slider 251 is in the second position, and the third detection switch 263 is configured to be triggered when the slider 251 is in the third position.

[0094] The three detection switches can be installed on the same PCB board 27, the slider 251 can have a detection matching part, the first detection switch 261, the second detection switch 262 and the third detection switch 263 are sequentially arranged on the moving path of the detection matching part along the first direction, and can be triggered at the detection matching part at the corresponding position. Among them, the detection switch can be but not limited to a photoelectric switch, a touch switch, etc., which is not specifically limited here.

[0095] In this way, the slider 251 can trigger the first detection switch 261, the second detection switch 262, and the third detection switch 263 respectively when it moves to the first position, the second position, and the third position. Accordingly, when the first detection switch 261 is triggered, it means that the slider 251 moves to the first position, when the second detection switch 262 is triggered, it means that the slider 251 moves to the second position, and when the third detection switch 263 is triggered, it means that the slider 251 moves to the third position. According to the triggering conditions of each detection switch, it can be known whether the slider 251 moves to the specified position, and the drive motor 24 is controlled accordingly to continue driving.

[0096] In some embodiments, the positive and negative pressure assembly 20 further includes a threaded rod 242 and a threaded mating piece 243, wherein the threaded rod 242 is axially arranged along the first direction and is transmission-connected to the drive motor 24, and the threaded mating piece 243 is threadedly mated with the threaded rod 242 and connected to the slider 251. The threaded mating piece 243 may be, but is not limited to, a threaded mating piece 243 having an internal thread structure.

[0097] In this way, the threaded rod 242 can rotate under the drive of the driving motor 24, and thereby drive the threaded fitting 243 matched therewith to move up and down, and accordingly, the slider 251 connected to the threaded fitting 243 also moves up and down accordingly.

[0098] It is understandable that in some other embodiments, the driving motor 24 can also drive the slider 251 to move linearly by means of a rack, a chain, etc., which is not specifically limited here.

[0099] Furthermore, the positive and negative pressure assembly 20 also includes a pressure plate 244 and a bearing 245 . The pressure plate 244 is fixedly arranged relative to the connecting pipe 22 . One end of the threaded rod 242 is transmission-connected to the driving motor 24 , and the other end is rotatably connected to the pressure plate 244 through the bearing 245 .

[0100] In this way, both ends of the threaded rod 242 are supported to improve its stability during rotation.

[0101] Further, the driving motor 24 is configured to be able to drive the threaded rod 242 to rotate around its axial direction along a first direction and a second direction, respectively, and the first direction is opposite to the second direction.

[0102] In other words, the rotation output by the drive motor 24 can be forward and reverse, and the drive motor 24 can be a forward and reverse motor or can be achieved through a transmission mechanism and a clutch mechanism.

[0103] In this way, the driving motor 24 can drive the threaded rod 242 to rotate along the first direction around its axis to drive the slider 251 to move downward along the first direction. The driving motor 24 can also drive the threaded rod 242 to rotate along the second direction around its axis to drive the slider 251 to move upward along the first direction, so that the slider 251 can move in the directions of the first position, the second position and the third position, and can also move in the directions of the third position, the second position and the first position, thereby realizing reciprocating movement. After the slider 251 reaches the third position from the first position and the second position, it can also return to the first position as the initial position.

[0104] In some embodiments, the base station 100 further includes an ozone generator 30 and a blower 4021 , the output port 151 of the ozone generator 30 is connected to the inside of the housing 28 , and the blower 4021 is connected to the inside of the housing 28 .

[0105] The ozone generator 30 can generate ozone and release it to the outside through the output port 151. The blower 4021 can drive the gas flow in the housing 28. The base station 100 also includes a mounting cover 41, which is used to fix the blower 4021 on the housing 28.

[0106] In this way, after the sewage is discharged, the slider 251 can remain in the third position, and after the blower 4021 is started, the ozone generator 30 releases ozone and transports it to the fluids of the base station 100 and the fan 21 for deodorization and sterilization, so as to reduce the odor that may be generated by sewage extraction and discharge, and finally discharge the ozone into the sewer. After the ozone deodorization and sterilization, the drive motor 24 starts the motor shaft thread in the reverse direction to drive the slider 251 to move upward to the first position of the initial state through the threaded fitting 243.

[0107] For ease of understanding, a partial assembly process of the base station 100 is briefly described below:

[0108] First, install the first sealing ring 230 into the positioning groove of the upper shell 283, then install the fan 21, and then install the second sealing ring 240 into the second positioning groove of the fan 21, and finally fix the lower shell 284 with the sponge ring 285 and the upper shell 283 through the screw columns and screw holes; the ozone generator 30 is installed into the upper shell 283 and fixed with two screws, the two holes of the blower 4021 are aligned with the positioning columns of the upper shell 283, and then covered with two screws through the machine cover. Assemble the first valve 231: First, secondary injection mold the two door body sealing rings 234 onto the door body 235 of the first valve 231, then install the drive shaft 252 of the first valve 231 and add the retaining spring 236 for axial limitation; Similarly, assemble the second valve 232: first, secondary injection mold the two door body 235 sealing parts onto the door body 235 of the second valve 232, then install the drive shaft 252 of the second valve 232 and add the retaining spring 236 for axial limitation; install the third sealing ring 250 into the bottom of the lower shell 284, and then connect it with 4 screws. Then, the lower shell 225 of the pipeline is screwed to the lower shell 284 through 3 screws, and then the upper shell 224 of the pipeline is installed and fixedly connected through 4 screws, and finally the positive and negative pressure sealing ring is inserted into the end of the upper shell 224 of the pipeline that is connected to the positive and negative pressure bellows 29; the positive and negative pressure assembly 20 also includes a motor cover 241, and the driving motor 24 is installed in the motor cover 241 and fixed by 4 screws, wherein the motor cover 241 is installed on the lower shell 225 of the pipeline from one side through a positioning column, and then fixedly connected by 2 screws. The threaded fitting 243 designed on the threaded rod 242 can move up and down through the rotation of the threaded rod 242, and the slider 251 can be connected to the threaded fitting 243 through 4 screws, and the positioning rib is installed in the guide groove of the upper shell 224 of the pipeline to limit the up and down movement of the slider 251. The PCB board 27 with three detection switches is fixed on the pressure plate 244 by two screws, the top of the threaded rod 242 is connected with the inner ring of the bearing 245 by interference fit, and the pressure plate 244 is pressed into the outer ring of the bearing 245 and fixedly connected with the motor cover 241 and the upper shell 224 of the pipeline by two screws. The door body sealing ring 234 is secondary injection molded on the third valve 233 and installed in the third valve 233 drive shaft 252 and then clamped into the retaining ring 236 and installed in the sewage outlet 11 of the upper shell 14, and then the lower shell 15 is docked with the upper shell 14 and fixed by four screws. One end of the positive and negative pressure bellows 29 is connected to the first positive and negative pressure air outlet 223 of the upper shell 224 of the pipeline, and the other end is connected to the second positive and negative pressure air outlet 12 of the upper shell 14 of the sewage tank 10; the sewage extraction bellows 220 is connected to the sewage extraction air outlet of the upper shell 14 of the sewage tank 10, and the other end is connected to the sewage box of the floor scrubber body.

[0109] For ease of understanding, part of the working process of the base station 100 is briefly described below:

[0110] When negative pressure sewage extraction is performed, the slider 251 position piece is in the position of triggering the first detection switch 261 on the PCB board 27, the drive motor 24 is not started, and the threaded fitting 243 matched with the slider 251 ensures that the first valve 231, the second valve 232 and the third valve 233 are all in a horizontal state through its self-locking property with the threaded rod 242. The first valve 231 opens the first connecting port 221 and closes the air inlet 281, the second valve 232 closes the second connecting port 222 and opens the air outlet 282, and the third valve 233 closes the sewage outlet 11, and a negative pressure sewage extraction air duct is formed in the base station 100. The fan 21 is started, and its air intake port 211 is connected with the connecting pipe 22 through the first connecting port 221, and suction is generated at the first positive and negative pressure air port 223, and the exhaust port 212 is exhausted at the air outlet 282 of the casing 28; the first positive and negative pressure air port 223 is connected with the sewage tank 10 through the positive and negative pressure bellows 29, and the sewage tank 10 is connected with the sewage box of the floor scrubber body through the sewage extraction bellows 220, and the sewage in the sewage box of the floor scrubber body is extracted into the sewage tank 10 by negative pressure, and then the fan 21 stops.

[0111] When positive pressure sewage discharge is performed, positive pressure is maintained first: the driving motor 24 is started, the threaded rod 242 drives the slider 251 to move downward through the threaded fitting 243, and the slider 251 is controlled to move downward to the second position through the detection switch on the PCB board 27. At this time, the first valve 231 and the second valve 232 rotate 45 degrees, but the third valve 233 remains horizontal, the first valve 231 closes the first connecting port 221 and opens the air inlet 281, the second valve 232 opens the second connecting port 222 and closes the air outlet 282, and the third valve 233 closes the sewage outlet 11, and a positive pressure maintaining air duct is formed in the base station 100. The fan 21 is started, and its air inlet 211 sucks gas from the air inlet 281 of the housing 28, and the exhaust port 212 is connected with the second connecting port 222, and exhaust is generated at the first positive and negative pressure air port 223, and the sewage tank 10 is pressurized and gathered; then the sewage is discharged under positive pressure: the driving motor 24 is started, and the threaded rod 242 drives the slider 251 to move downward through the threaded fitting 243, and the slider 251 is controlled to move downward to the third position through the detection switch on the PCB board 27. At this time, the first valve 231 and the second valve The door 232 and the third valve 233 are at a 45-degree angle relative to the horizontal plane, the first valve 231 closes the first connecting port 221 and opens the air inlet 281, the second valve 232 opens the second connecting port 222 and closes the air outlet 282, and the third valve 233 is opened, a positive pressure sewage discharge duct is formed in the base station 100, the fan 21 can be stopped, and the pressurized gas is used to discharge sewage, so that enough gas is gathered in the sewage tank 10 to discharge the sewage instantly, and the sewage in the sewage tank 10 is discharged into the sewer through the outlet 151 of the lower shell 15 thereof.

[0112] Finally, the slider 251 remains stationary at the third position, and after the blower 4021 is started, the ozone generator 30 releases ozone and transports it to the fluids of the base station 100 and the blower 21 for deodorization and sterilization, and finally discharges the ozone into the sewer. After the ozone deodorization and sterilization, the drive motor 24 starts the motor shaft thread in the reverse direction to drive the slider 251 upward to the first position of the initial state through the threaded fitting 243.

[0113] The above-mentioned base station 100 is equipped with a single drive motor 24, which cooperates with the threaded rod 242 and the threaded fitting 243 as the only linear motor, and moves along the upper and lower linear bandpass sliders 251. The sliders 251 form different moving paths of the drive shafts 252 through their differently arranged transmission grooves, and correspondingly drive the three valves through the drive shafts 252 to achieve accurate driving of the three valves with inconsistent position directions and start-up order, so that the positive and negative pressure components 20 have three different working states: negative pressure sewage extraction state, positive pressure pressure holding state, and positive pressure sewage discharge state. In this way, when the slider 251 is in three different positions, the three valves can be in different states accordingly, realizing the state switching of the base station 100. When the positive and negative pressure assembly 20 is in the negative pressure sewage extraction state, the fan 21 is started, its air intake port 211 is connected with the connecting pipe 22 through the first connecting port 221, and suction is generated at the first positive and negative pressure air port 223, and the exhaust port 212 exhausts air at the air outlet 282 of the housing 28; the first positive and negative pressure air port 223 is connected with the sewage tank 10 through the positive and negative pressure bellows 29, and the sewage tank 10 is connected with the sewage box of the floor scrubber body through the sewage extraction bellows 220, and the sewage in the sewage box of the floor scrubber body is extracted into the sewage tank 10 by negative pressure. When the positive and negative pressure assembly 20 is in the positive pressure pressure maintaining state, the fan 21 is started, its air intake port 211 sucks gas from the air inlet 281 of the housing 28, and the exhaust port 212 is connected with the second connecting port 222, and exhaust is generated at the first positive and negative pressure air port 223, and the sewage tank 10 is pressurized to gather gas. When the positive and negative pressure assembly 20 is in the positive pressure sewage discharge state, the pressurized gas in the sewage tank 10 is used for sewage discharge, so that enough gas is gathered in the sewage tank 10 to discharge the sewage instantly, and the sewage in the sewage tank 10 is discharged into the sewer through the outlet 151 of the lower shell 15. In other words, the base station 100 realizes the driving of the valves in three states that are not completely synchronized through the paths of the different drive shafts 252 formed on the linkage mechanism 25 by a single drive motor 24, which reduces the number of motors and related assembly parts and assembly hours, greatly optimizes the space and reduces the cost, and improves the stability and reliability of the coordination of the three valves. In addition, the base station 100 can also generate ozone through the ozone generator 30, cooperate with the blower 4021 to form a blowing airflow, carry ozone to each fluid and gas path structure in the base station 100, and sterilize the fluid and gas path structure of the base station 100 to reduce the odor that may be generated due to sewage extraction and sewage discharge.

[0114] The present application also provides a floor scrubber, including the above-mentioned base station 100. It can be understood that in order to realize its normal function, the floor scrubber also includes a floor scrubber body (not shown), which is used to perform cleaning work and can cooperate with the base station 100. The base station 100 can clean and charge the floor scrubber.

[0115] Please also read Fig.18 For ease of understanding, the following is a brief description of some of the working steps of the floor scrubber:

[0116] 1. After the floor scrubber performs the sweeping operation, it enters the base station 100 and prepares to perform negative pressure sewage extraction;

[0117] 2. According to the triggering conditions of all detection switches, detect whether the position of the slider 251 is in the first position; if not, it means that the position is incorrect and the fan 21 does not start; if yes, it means that the first valve 231, the second valve 232 and the third valve 233 are in a horizontal state accordingly, that is, the first valve 231 opens the first communication port 221 and closes the air inlet 281, the second valve 232 closes the second communication port 222 and opens the air outlet 282, the third valve 233 closes the sewage outlet 11, the fan 21 starts, and a negative pressure sewage extraction air duct is formed in the base station 100, and the base station 100 enters a negative pressure sewage extraction state;

[0118] 3. According to the triggering conditions of all detection switches, detect whether the position of the slider 251 is still in the first position; if so, it means that the base station 100 is still in the negative pressure sewage pumping state, and the fan 21 remains started; if not, it means that the slider 251 has moved down, and the fan 21 stops;

[0119] 4. According to the triggering conditions of all detection switches, detect whether the position of the slider 251 moves down to the second position; if not, it means that the position is incorrect, the fan 21 does not start, and the waiting continues; if yes, it means that the first valve 231 and the second valve 232 rotate 45° at this time, and the third valve 233 is in a horizontal state, that is, the first valve 231 closes the first connecting port 221 and opens the air inlet 281, the second valve 232 opens the second connecting port 222 and closes the air outlet 282, the third valve 233 closes the sewage outlet 11, the fan 21 starts, and a positive pressure maintaining air duct is formed in the base station 100, the base station 100 enters a positive pressure maintaining state, and gas gathers in the sewage tank 10;

[0120] 5. According to the triggering conditions of all detection switches, detect whether the slider 251 is still in the second position; if so, it means that the base station 100 is still in the positive pressure holding state, and the fan 21 is not started; if not, it means that the slider 251 has moved down, and the fan 21 is stopped;

[0121] 6. According to the triggering conditions of all detection switches, detect whether the position of the slider 251 moves down to the third position; if not, it means that the position is incorrect, the fan 21 does not start, and continues to wait; if yes, it means that the first valve 231, the second valve 232 and the third valve 233 are all in the 45° state, that is, the first valve 231 closes the first connecting port 221 and opens the air inlet 281, the second valve 232 opens the second connecting port 222 and closes the air outlet 282, the third valve 233 opens the sewage outlet 11, the fan 21 stops, and a positive pressure sewage discharge duct is formed in the base station 100, the base station 100 enters the positive pressure holding state, and uses the pressurized gas to discharge sewage;

[0122] 7. After 3 seconds of sewage discharge, start the blower 4021 to release the ozone from the ozone generator 30 and transport it to the fluids and blower 21 of the base station 100 for deodorization and sterilization, and finally discharge the ozone into the sewer;

[0123] 8. After the ozone deodorization and sterilization, the drive motor 24 is started, and the threaded rod 242 is reversed to drive the slider 251 to move upward to the first position of the initial state through the threaded fitting 243.

[0124] The above-mentioned floor scrubber, its base station 100 is equipped with a single drive motor 24, the drive motor 24 cooperates with the threaded rod 242 and the threaded fitting 243 as the only linear motor, moves along the upper and lower linear band pass sliders 251, the sliders 251 form different moving paths of the drive shaft 252 through their differently arranged transmission grooves, and correspondingly drive the three valves through the drive shaft 252 respectively, so as to achieve accurate driving of the three valves with inconsistent position directions and start-up order, so that the positive and negative pressure components 20 have three different working states: negative pressure sewage extraction state, positive pressure pressure holding state and positive pressure sewage discharge state. In this way, when the slider 251 is in three different positions, the three valves can be in different states accordingly, so as to achieve the state switching of the base station 100. When the positive and negative pressure assembly 20 is in the negative pressure sewage extraction state, the fan 21 is started, its air intake port 211 is connected with the connecting pipe 22 through the first connecting port 221, and suction is generated at the first positive and negative pressure air port 223, and the exhaust port 212 exhausts air at the air outlet 282 of the housing 28; the first positive and negative pressure air port 223 is connected with the sewage tank 10 through the positive and negative pressure bellows 29, and the sewage tank 10 is connected with the sewage box of the floor scrubber body through the sewage extraction bellows 220, and the sewage in the sewage box of the floor scrubber body is extracted into the sewage tank 10 by negative pressure. When the positive and negative pressure assembly 20 is in the positive pressure pressure maintaining state, the fan 21 is started, its air intake port 211 sucks gas from the air inlet 281 of the housing 28, and the exhaust port 212 is connected with the second connecting port 222, and exhaust is generated at the first positive and negative pressure air port 223, and the sewage tank 10 is pressurized to gather gas. When the positive and negative pressure assembly 20 is in the positive pressure sewage discharge state, the pressurized gas in the sewage tank 10 is used for sewage discharge, so that enough gas is gathered in the sewage tank 10 to discharge the sewage instantly, and the sewage in the sewage tank 10 is discharged into the sewer through the outlet 151 of the lower shell 15. In other words, the base station 100 realizes the driving of the valves in three states that are not completely synchronized through the paths of the different drive shafts 252 formed on the linkage mechanism 25 by a single drive motor 24, which reduces the number of motors and related assembly parts and assembly hours, greatly optimizes the space and reduces the cost, and improves the stability and reliability of the coordination of the three valves. In addition, the base station 100 can also generate ozone through the ozone generator 30, cooperate with the blower 4021 to form a blowing airflow, carry ozone to each fluid and gas path structure in the base station 100, and sterilize the fluid and gas path structure of the base station 100 to reduce the odor that may be generated due to sewage extraction and sewage discharge.

[0125] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A base station, characterized in that: The base station comprises a sewage tank (10) and a positive and negative pressure assembly (20), wherein the sewage tank (10) has a sewage outlet (11), and the positive and negative pressure assembly (20) comprises: Fan (21); A communication pipe (22) connected to the sewage tank (10) and having a first communication port (221) and a second communication port (222); A valve, comprising a first valve (231), a second valve (232) and a third valve (233), wherein the first valve (231) is openably and closably arranged at the first communication port (221), and the first communication port (221) is configured to be connected to an air intake port (211) of the fan (21) when opened; the second valve (232) is openably and closably arranged at the second communication port (222), and the second communication port (222) is configured to be connected to an air exhaust port (212) of the fan (21) when opened; the third valve (233) is openably and closably arranged at the sewage outlet (11); and A driving motor (24) and a linkage mechanism (25), wherein the driving motor (24) is transmission-connected to the first valve (231), the second valve (232) and the third valve (233) via the linkage mechanism (25).

2. The base station according to claim 1, characterized in that The linkage mechanism (25) has a first state, a second state and a third state, and is configured to be switchable among the first state, the second state and the third state under the drive of the drive motor (24); In the first state, the linkage mechanism (25) drives the first valve (231) to open the first connecting port (221), drives the second valve (232) to close the second connecting port (222), and drives the third valve (233) to close the sewage outlet (11); in the second state, the linkage mechanism (25) drives the first valve (231) to close the first connecting port (221), drives the second valve (232) to open the second connecting port (222), and drives the third valve (233) to close the sewage outlet (11); in the third state, the linkage mechanism (25) drives the first valve (231) to close the first connecting port (221), drives the second valve (232) to open the second connecting port (222), and drives the third valve (233) to open the sewage outlet (11).

3. The base station according to claim 2, characterized in that The valves are configured to be able to flip around their respective flip axes to achieve opening and closing; The linkage mechanism (25) comprises a transmission part and three drive shafts (252), wherein the three drive shafts (252) are respectively connected to the first valve (231), the second valve (232) and the third valve (233), and are parallel to and spaced apart from the flip axes of the connected valves; the transmission part is transmission-connected to the drive motor (24), and is configured to be able to drive the three drive shafts (252) to rotate around the flip axes of the connected valves under the drive of the drive motor (24).

4. The base station according to claim 3, characterized in that The transmission part is a slider (251), the slider (251) having a first position, a second position and a third position sequentially arranged along a first direction, and being configured to be able to move along the first direction under the drive of the drive motor (24); when the slider (251) is in the first position, the linkage mechanism (25) is in the first state; When the slider (251) is in the second position, the linkage mechanism (25) is in the second state; when the slider (251) is in the third position, the linkage mechanism (25) is in the third state; The flip axis intersects with the first direction, the slider (251) has three sliding grooves (2511), the three driving shafts (252) are respectively at least partially located in the three sliding grooves (2511) and can slide along the sliding grooves (2511); the transmission groove comprises a driving section (2512) and a non-driving section (2513), the driving section (2512) extends along a direction intersecting with the first direction, and the non-driving section (2513) extends along the first direction; During the movement of the slider (251) from the first position to the second position, the drive shaft (252) connected to the first valve (231) is in the drive section (2512), the drive shaft (252) connected to the second valve (232) is in the drive section (2512), and the drive shaft (252) connected to the third valve (233) is in the non-drive section (2513); during the movement of the slider (251) from the second position to the third position, the drive shaft (252) connected to the first valve (231) is in the non-drive section (2513), the drive shaft (252) connected to the second valve (232) is in the non-drive section (2513), and the drive shaft (252) connected to the third valve (233) is in the drive section (2512).

5. The base station according to claim 4, characterized in that The positive and negative pressure assembly (20) further includes a first detection switch (261), a second detection switch (262) and a third detection switch (263). The first detection switch (261), the second detection switch (262) and the third detection switch (263) are sequentially arranged along the first direction on the moving path of the slider (251). The first detection switch (261) is configured to be triggered when the slider (251) is in the first position, the second detection switch (262) is configured to be triggered when the slider (251) is in the second position, and the third detection switch (263) is configured to be triggered when the slider (251) is in the third position.

6. The base station according to claim 4, characterized in that The positive and negative pressure assembly (20) further comprises a threaded rod (242) and a threaded fitting (243), wherein the threaded rod (242) is axially arranged along the first direction and is drivingly connected to the drive motor (24), and the threaded fitting (243) is threadably fitted to the threaded rod (242) and is connected to the slider (251).

7. The base station according to claim 6, characterized in that The positive and negative pressure assembly (20) further comprises a pressing plate (244) and a bearing (245); the pressing plate (244) is fixedly arranged relative to the connecting pipe (22); one end of the threaded rod (242) is drivingly connected to the driving motor (24), and the other end is rotatably connected to the pressing plate (244) via the bearing (245); And / or, the driving motor (24) is configured to be able to drive the threaded rod (242) to rotate around its axis along a first direction and a second direction, respectively, and the first direction is opposite to the second direction.

8. The base station according to any one of claims 1 to 7, characterized in that: The positive and negative pressure assembly (20) further comprises a casing (28), the fan (21) being arranged in the casing (28), the casing (28) having an air inlet (281) and an air outlet (282), the first valve (231) being configured to be selectively covered on one of the first connecting port (221) and the air inlet (281), the air inlet (281) being configured to be connected to the air intake port (211) of the fan (21) when opened; the second valve (232) being configured to be selectively covered on one of the second connecting port (222) and the air outlet (282), the air outlet (282) being configured to be connected to the air exhaust port (212) of the fan (21) when opened.

9. The base station according to any one of claims 1 to 7, characterized in that: The positive and negative pressure components (20) further include a casing (28), and the fan (21) is disposed in the casing (28); the base station further includes an ozone generator (30) and a blower (40) (21), the output port (151) of the ozone generator (30) is connected to the casing (28), and the blower (40) (21) is connected to the casing (28).

10. A floor scrubber, characterized in that: Comprising a base station as described in any one of claims 1-9.

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