Self-cleaning type floor cleaning machine

Abstract

The present application relates to the technical field of floor washing machines, and specifically discloses a self-cleaning floor washing machine, which comprises a main machine and a cleaning base station, wherein the main machine is provided with a machine body, a ground climbing device, a handle, a sewage tank, a power battery, a vacuum fan, a clean water tank, a cleaning roller assembly, a power wheel assembly and a universal wheel assembly; the cleaning base station is provided with a seat body, a water bucket, a sewage tank interface, a clean water tank interface, a sewage discharge groove, a water adding pipeline and a water supply pipeline; the bottom of the sewage tank is provided with a water spraying valve assembly and a first water inlet connected therewith; when the main machine and the cleaning base station are installed with each other, the sewage tank interface is connected with the first water inlet, the water supply pipeline can provide high-pressure water flow for the water spraying valve assembly, so as to perform high-pressure deep cleaning on the inner wall of the sewage tank; the water supply pipeline is further provided with a heating pipe, which can heat the water and then add the heated water into the clean water tank or directly high-pressure spray the inner wall of the sewage tank, and cooperate with adding a cleaning agent into the water bucket, so as to improve the floor washing effect and the deep cleaning effect of the sewage tank.

Description

Technical Field

[0001] This invention belongs to the field of floor scrubbing machine technology, and specifically relates to a self-cleaning floor scrubbing machine. Background Technology

[0002] Floor scrubbers are portable cleaning machines that integrate brushing, sweeping, and wastewater collection, and are widely used in offices and homes. Existing floor scrubbers typically consist of two parts: a main unit and a base station. The base station houses and cleans the main unit. Cleaning the main unit usually involves only simple rinsing, drying, and disinfecting the cleaning rollers and wastewater container. However, it cannot effectively and automatically deep clean stubborn stains and grease inside the wastewater container. When deep cleaning is needed, the wastewater container usually needs to be manually disassembled, cleaned, and reinstalled. This is not only inefficient but also makes it difficult to insert cleaning tools into the container to clean its inner walls. Furthermore, using standard-temperature water or soapy water is insufficient to effectively remove grease and stubborn stains from the floor. Therefore, existing floor scrubbers generally suffer from poor grease removal capabilities and the inability to effectively deep clean the wastewater container.

[0003] Patent application number "202411817592.6" discloses a method for cleaning a base station, cleaning equipment, and drying control. It primarily uses a first fan connected to a drying duct to generate airflow within the duct. A heating device is also connected to the drying duct to heat the air inside. Through the combined action of the first fan, heating device, and drying duct, hot air is generated for drying moisture. However, the overall solution only addresses the technical issues of optimizing and deeply drying the wastewater container and brush head, without addressing how to deeply clean residual stains on the inner wall of the wastewater container or how to improve the cleaning effect on oil stains and stubborn dirt on the floor.

[0004] The above background information is provided only to aid in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cleaning floor scrubber, thereby overcoming the shortcomings of existing floor scrubbers that cannot automatically and deeply clean stubborn stains such as oil stains in wastewater containers and have poor cleaning effects on oil stains and stubborn stains on the ground.

[0006] To achieve the above objectives, the present invention provides a self-cleaning floor scrubber, comprising a main unit and a cleaning base station. The main unit includes a body, a floor crawler, and a handle. The body houses a wastewater tank, a power battery, and a vacuum blower. The floor crawler includes a clean water tank, a cleaning roller assembly, a booster wheel assembly, and casters. The bottom of the floor crawler has a first water inlet, a second water inlet, a drain outlet, and a suction port. The bottom of the wastewater tank communicates with the drain outlet and the suction port. A spray valve assembly is installed at the bottom of the wastewater tank and is connected to the first water inlet. The bottom of the clean water tank has a first one-way valve and a second one-way valve. The first one-way valve is connected to the second water inlet, and the second one-way valve is connected to the cleaning base station. The cleaning base station includes a base and a water tank. The top of the base is provided with a drain trough, a clean water tank interface, and a wastewater tank interface. The main unit can be placed on the top of the base. The first water inlet interface is connected to the wastewater tank interface, and the second water inlet interface is connected to the clean water tank interface. The drain trough is located below the drain outlet, and the bottom of the drain trough is provided with a drain pipe. The base is provided with a water supply pipe and a water filling pipe. The outlet of the water filling pipe and the inlet of the water supply pipe are connected to the bottom of the water tank through a third one-way valve. The inlet of the water filling pipe is provided with a third water inlet interface, and the outlet of the water supply pipe is connected to the clean water tank interface and the wastewater tank interface, respectively.

[0007] Preferably, in the above technical solution, a first solenoid valve is installed in the water supply pipeline; and a liquid level sensor is provided in the sewage discharge tank.

[0008] Preferably, in the above technical solution, the water supply pipeline includes a main pipe, a first branch pipe, and a second branch pipe; the inlet end of the first branch pipe and the inlet end of the second branch pipe are simultaneously connected to the end of the main pipe, the outlet end of the first branch pipe is connected to the clean water tank interface, and a first diaphragm pump and a second solenoid valve are sequentially arranged from the inlet end to the outlet end of the first branch pipe; the outlet end of the second branch pipe is connected to the sewage tank interface, and a second diaphragm pump and a third solenoid valve are sequentially arranged from the inlet end to the outlet end of the second branch pipe.

[0009] Preferably, in the above technical solution, the water supply pipeline further includes a return water pipeline. The inlet end of the return water pipeline is connected to the side of the first branch line through a three-way pipe, and the connection point is located between the first diaphragm pump and the second solenoid valve. The outlet end of the return water pipeline is connected to the main pipeline, the first branch line, and the second branch line simultaneously through a four-way pipe. A third diaphragm pump and a fourth one-way valve are sequentially arranged along the inlet end to the outlet end of the return water pipeline.

[0010] Preferably, in the above technical solution, the first branch circuit is provided with a heating tube, which is located between the three-way pipe and the first diaphragm valve.

[0011] Preferably, in the above technical solution, a water tank mounting groove is provided on the machine body, and the sewage tank is detachably installed in the water tank mounting groove. The bottom of the water tank mounting groove is provided with a sewage discharge channel, a sewage suction pipe, and a water valve connecting sleeve. The sewage discharge port is located at the lower end of the sewage discharge channel, and a sewage inlet is provided at the upper end of the sewage discharge channel. One end of the sewage suction pipe is connected to the bottom of the water tank mounting groove and is provided with a rubber sealing cover. The opening of the rubber sealing cover is provided with a flange. The other end of the sewage suction pipe is close to the cleaning roller assembly and is provided with a sewage suction port. A rubber floor scraper is provided at the bottom edge of the sewage suction port. There are two or more water valve connecting sleeves, and each water valve connecting sleeve is connected to the first water inlet through a distribution valve.

[0012] Preferably, in the above technical solution, the number and position of the spray valve assembly correspond to the number and position of the water valve connecting sleeve. The spray valve assembly includes: a first valve seat, a positioning ring, a first connecting nozzle, a first sealing part, a spring bracket, a tension spring, and a valve core. The positioning ring and the first connecting nozzle are fixedly disposed at the bottom of the sewage tank. The first connecting nozzle is located at the center of the positioning ring and has a first water passage through it. The first valve seat is fixedly disposed inside the sewage tank. The first sealing part and the spring bracket are fixedly installed inside the first valve seat. The first sealing part has a second water passage. The spring bracket has a first water passage hole, and a spring tension beam is provided at the first water passage hole. The valve core has a spring pull ring at its bottom, a first inverted conical surface at its top, and a second inverted conical surface matching the first inverted conical surface on its outer side. The two ends of the tension spring are fixedly connected to the spring pull ring and the spring pull beam, respectively. The tension spring can pull the valve core toward the top of the first sealing part and make the second inverted conical surface fit tightly with the first inverted conical surface. Several water passage grooves are opened around the top surface of the valve core, and the water passage grooves pass through the top surface of the valve core and the second inverted conical surface. When the sewage tank and the water tank mounting groove are assembled together, the positioning ring can be fitted around the outer circumference of the water valve connecting sleeve, and the first connecting nozzle can be inserted into the water valve connecting sleeve.

[0013] Preferably, in the above technical solution, the bottom of the sewage tank is provided with a drain outlet, and a sealing cover is provided at the drain outlet. One end of the sealing cover is rotatably connected to the bottom of the sewage tank via a rotating shaft and is equipped with a torsion spring. The other end of the sealing cover can rotate toward the bottom of the drain outlet and is provided with a groove. A rubber sealing gasket matching the size of the drain outlet is provided on the sealing cover. An elastic retaining plate is provided on the side of the sewage tank. The middle part of the elastic retaining plate is rotatably connected to the side of the sewage tank. One end of the elastic retaining plate is provided with a retaining claw matching the groove. A return spring is installed between the other end of the elastic retaining plate and the side of the sewage tank. When the sewage tank and the water tank mounting groove are assembled together, the drain outlet and the sealing cover are located above the sewage inlet.

[0014] Preferably, in the above technical solution, the end of the rotating shaft is provided with a rotating block, one side of the rotating block is provided with an arc-shaped limiting groove, and the other side of the rotating block is provided with a limiting surface. The center of curvature of the arc-shaped limiting groove coincides with the axis of the rotating shaft. The fuselage is provided with a first servo motor, the output shaft of the first servo motor is provided with an eccentric wheel, and the eccentric wheel is provided with a cylindrical pin. When the first servo motor drives the eccentric wheel to rotate, the cylindrical pin can be engaged into the arc-shaped limiting groove or abut against the limiting surface to drive the sealing cover to close or open. The fuselage is also equipped with an electric push rod. When the end of the electric push rod extends outward, it can abut against the other end of the elastic plate and push it, thereby separating the claw from the slot.

[0015] Preferably, in the above technical solution, the vacuum blower is connected to the top of the sewage tank, and a return water pipe is provided inside the sewage tank. One end of the return water pipe extends towards the top of the sewage tank and a guide rod is provided at the end face. A slidable baffle is provided on the guide rod. The bottom of the baffle can cover the opening of one end of the return water pipe. The other end of the return water pipe extends downward from the bottom of the sewage tank. When the sewage tank and the water tank mounting groove are assembled together, the other end of the return water pipe can extend into the rubber sealing cover and the flange can abut against the bottom of the sewage tank.

[0016] Compared with existing technologies, the present invention has the following advantages: 1. The self-cleaning floor scrubber of this invention has a spray valve assembly and a first water inlet connected to it at the bottom of the wastewater tank. When the main unit and the cleaning base station are installed together, the wastewater tank interface on the cleaning base station is connected to the first water inlet. High-pressure water flow can be provided to the spray valve assembly through the water supply pipeline, thereby performing high-pressure deep cleaning of the inner wall of the wastewater tank. In addition, a heating pipe is also installed in the water supply pipeline, so that the water can be heated and added to the clean water tank or directly sprayed at high pressure onto the inner wall of the wastewater tank. With the addition of cleaning agent in the water bucket, the floor cleaning effect and the deep cleaning effect of the wastewater tank can be improved.

[0017] 2. The third water inlet in this invention can be directly connected to an external water source, and the drain pipe can be directly connected to a floor drain, so it can be conveniently connected and used in areas such as balconies or bathrooms. In addition, a liquid level sensor is installed in the sewage tank, which can stop the machine and alarm in time when the water distribution pipe is blocked, so as to avoid sewage overflow caused by blockage.

[0018] 3. In this invention, the water supply pipeline is connected to the clean water tank interface and the wastewater tank interface via a first branch and a second branch, respectively. The heating pipe is installed in the first branch, and its rear end is connected to the connection end of the first and second branches via a return water circuit. This design can meet four functional requirements: First, by directly opening the second solenoid valve in the first branch and closing the second and third diaphragm pumps, hot water can be added to the clean water tank; Second, by closing the second solenoid valve and simultaneously opening the first, second, and third diaphragm pumps, hot water can be added by passing it through the first, second, and third diaphragm pumps. The system employs several techniques: First, high-pressure jets are sprayed into the wastewater tank for powerful cleaning to remove stubborn stains. Second, when the second and third solenoid valves are opened simultaneously, the first, second, and third diaphragm pumps can simultaneously perform medium-temperature, medium-intensity cleaning of the wastewater tank and inject medium-temperature water into the clean water tank. Third, when the heating element is closed, and the second and third solenoid valves are opened simultaneously, the first and second diaphragm pumps can be opened to add room-temperature water to the clean water tank and perform a light, room-temperature cleaning of the wastewater tank. This allows for more functions with fewer pipework components and provides higher jet water pressure for cleaning the wastewater tank.

[0019] 4. The water spray valve assembly in this invention can automatically open when a certain water pressure is reached, and can form a good seal when closed. Furthermore, the structural design of the water groove cut vertically around the valve core enables the water spray valve to spray high-pressure water jets in a vertical fan shape at multiple angles around the circumference. In addition, two sets of water spray valve assemblies are set in the sewage tank, which realizes the coverage of multiple spray areas in the longitudinal and transverse directions, and comprehensively improves the cleaning effect of the inner wall of the sewage tank.

[0020] 5. In this invention, the sealing cover is locked by an elastic plate when closed. The automatic opening and closing of the sealing cover can be controlled by the first servo motor, eccentric wheel, cylindrical pin and rotating block. This prevents the sealing cover from being unable to open due to adhesion between the rubber sealing gasket and the drain outlet when the sealing cover is opened by gravity of the sewage in the sewage tank.

[0021] 6. The top of the return water pipe in this invention is provided with a guide rod and a baffle. When the inner wall of the sewage tank is flushed, the baffle falls freely and blocks the opening of the return water pipe to prevent water from spraying into the return water pipe and leaking out from the suction port. When a negative pressure is generated in the sewage tank, the baffle can be opened so that the back-suctioned sewage flows into the sewage tank.

[0022] 7. The rubber sealing cover of the present invention has an outwardly flared top, which can not only play a certain guiding role when the sewage tank and the water tank are assembled with each other, but also abut against the bottom of the sewage tank to produce elastic deformation, thereby sealing the connection area between the return water pipe and the suction pipe. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the self-cleaning floor scrubber of the present invention.

[0024] Figure 2 This is a water circuit diagram of a cleaning base station.

[0025] Figure 3 This is the water circuit schematic diagram of the main unit.

[0026] Figure 4 This is a structural diagram from the bottom view of the main unit.

[0027] Figure 5 This is a structural diagram of the main unit after the sewage tank has been removed.

[0028] Figure 6 This is a partial cross-sectional view of the host computer.

[0029] Figure 7 This is a partial cross-sectional view of the sewage tank, the first servo motor, and its accessories.

[0030] Figure 8 It is a structural diagram of the rotating block, the first servo, the eccentric wheel, and the cylindrical pin.

[0031] Figure 9 This is a partial cross-sectional view of the water spray valve assembly.

[0032] Figure 10 This is a structural diagram of a clean base station.

[0033] Explanation of key figure labels: 100-Main unit, 120-Built body, 121-Water tank mounting groove, 122-Drainage channel, 123-Suction pipe, 124-Water valve connecting sleeve, 125-Drainage inlet, 126-Rubber sealing cover, 1267-Flanged edge, 127-Distribution valve, 130-Ground creeper, 131-Clear water tank, 1311-First check valve, 1312-Second check valve, 1313-Filter, 1314-Electrolyzed water Device, 1315-Flow meter, 1316-Peristaltic pump, 132-Cleaning roller assembly, 1321-Roll brush, 1322-Water spray pipe, 133-Assist wheel assembly, 134-Universal wheel, 135-First water inlet, 136-Second water inlet, 137-Drain outlet, 138-Suction outlet, 140-Handle, 150-Power battery, 160-Vacuum fan, 170-Rubber floor scraper; 200-Clean base station, 210-Base, 211-Sewage trough, 212-Clean water tank interface, 213-Sewage tank interface, 214-Drain pipe, 215-Liquid level sensor, 220-Water bucket; 300-Sewage tank, 301-Drain outlet, 310-Spray valve assembly, 311-First valve seat, 312-Positioning ring, 313-First connecting nozzle, 3131-First water passage, 314-First sealing part, 3141-Second water passage, 3142-First inverted conical surface, 315-Spring bracket, 3151-First water passage hole, 3152-Spring pull beam, 316-Tension spring, 317-Valve core, 3171-Spring pull ring, 3172-First... Two inverted conical surfaces, 3173-water passage groove, 320-sealing cover, 321-rotating shaft, 322-slot, 323-rubber sealing gasket, 324-torsion spring, 330-elastic clamping plate, 331-claw, 332-reset spring, 340-rotating block, 341-arc-shaped limiting groove, 342-limiting surface, 350-first servo motor, 351-eccentric wheel, 352-cylindrical pin, 360-electric push rod, 370-return water pipe, 371-guide rod, 372-baffle plate; 400 - Water supply line, 410 - Third check valve, 420 - Third water inlet, 430 - First solenoid valve; 500 - Water supply pipeline, 510 - Main pipe, 520 - First branch line, 521 - First diaphragm pump, 522 - Second solenoid valve, 530 - Second branch line, 531 - Second diaphragm pump, 532 - Third solenoid valve, 540 - Return water line, 541 - Third diaphragm pump, 542 - Fourth check valve, 550 - T-connector, 560 - Four-way connector, 570 - Heating pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0038] like Figure 1 , Figure 2 and Figure 10 As shown, the self-cleaning floor scrubber in this embodiment includes a main unit 100 and a cleaning base station 200. The cleaning base station 200 is equipped with a drain pipe 214 and a third water inlet 420. The drain pipe 214 is used to connect to a floor drain or drain water directly. The third water inlet 420 is used to connect to an external tap water pipe. The machine body 120 can be placed and positioned on top of the cleaning base station 200.

[0039] Specifically, such as Figures 1 to 10 The main unit 100 shown includes a body 120, a ground climber 130, and a handle 140. The ground climber 130 is located at the bottom of the body 120, and one end of the ground climber 130 extends outward from one side of the body 120. The handle 140 is a retractable long handle structure, and its lower end is rotatably connected to the other side of the body 120 near the bottom. The handle 140 can be folded and stored inside the body 120 or opened outward from the other side of the body 120. When opened, the top of the handle 140 can extend outward. The machine body 120 can swing laterally to adjust its direction of travel during operation. The machine body 120 houses a wastewater tank 300, a power battery 150, and a vacuum blower 160. A removable clean water tank 131 is mounted on the top of the ground crawler 130. A removable cleaning roller assembly 132, a booster wheel assembly 133, and casters 134 are mounted on the bottom of the ground crawler 130. The cleaning roller assembly 132 includes a roller brush 1321 and a water spray pipe 1322 located on the side of the roller brush 1321. The cleaning roller assembly 1321 and the auxiliary wheel assembly 133 have a built-in drive motor. The bottom of the ground crawler 130 has a first water inlet 135, a second water inlet 136, a drain outlet 137, and a suction port 138. The suction port 138 is located close to the cleaning roller assembly 132 and behind the roller brush 1321. A vacuum blower 160 is installed on top of the wastewater tank 300. The bottom of the wastewater tank 300 is connected to the drain outlet 137 and the suction port 138. A water spray valve assembly 310 is installed at the bottom of the wastewater tank 300. The water valve assembly 310 is connected to the first water inlet 135. The bottom of the clean water tank 131 is provided with a first one-way valve 1311 and a second one-way valve 1312. The first one-way valve 1311 is connected to the second water inlet 136. The second one-way valve 1312 is connected to the spray pipe 1322 of the cleaning roller assembly 132. A filter 1313, an electrolytic water device 1314, a flow meter 1315 and a peristaltic pump 1316 are connected in sequence between the second one-way valve 1312 and the spray pipe 1322.

[0040] The cleaning base station 200 includes a base 210 and a water tank 220. The top of the base 210 is equipped with a drain trough 211, a clean water tank interface 212, and a wastewater tank interface 213. The main unit 100 can be placed on top of the base 210 and is powered and communicates via plug-in electrode components. A first water inlet 135 is connected to the wastewater tank interface 213, and a second water inlet 136 is connected to the clean water tank interface 212. The drain trough 211 is located below the drain outlet 137, and a drain pipe 214 is connected to the bottom of the drain trough 211. A water supply pipe 400 and a water supply pipe 500 are installed inside the base 210. The outlet of the water supply pipe 400 and the inlet of the water supply pipe 500 are connected to the bottom of the water tank 220 through a third one-way valve 410. A third inlet interface 420 is provided at the inlet of the water supply pipe 400. The outlet of the water supply pipe 500 is connected to the clean water tank interface 212 and the sewage tank interface 213 respectively. A first solenoid valve 430 is installed in the water supply pipe 400. A liquid level sensor 215 is installed in the sewage tank 211.

[0041] More specifically, the water supply pipeline 500 includes a main pipe 510, a first branch pipe 520, a second branch pipe 530, and a return water line 540; the inlet end of the first branch pipe 520, the inlet end of the second branch pipe 530, and the outlet end of the return water line 540 are simultaneously connected to the end of the main pipe 510 via a four-way pipe 560; the outlet end of the first branch pipe 520 is connected to the clean water tank interface 212; a first diaphragm pump 521 and a second solenoid valve 522 are installed sequentially from the inlet end to the outlet end of the first branch pipe 520; the outlet end of the second branch pipe 530 is connected to the wastewater tank interface 213. The connection is as follows: a second diaphragm pump 531 and a third solenoid valve 532 are installed sequentially from the inlet to the outlet of the second branch 530. The inlet of the return water line 540 is connected to the side of the first branch 520 through a three-way pipe 550, and this connection is located between the first diaphragm pump 521 and the second solenoid valve 522. A third diaphragm pump 541 and a fourth check valve 542 are installed sequentially from the inlet to the outlet of the return water pipe 370. A heating pipe 570 is also installed in the first branch 520, and the heating pipe 570 is located between the three-way pipe 550 and the first diaphragm valve.

[0042] It is worth noting that the design of the water supply pipeline 500 in this embodiment can meet four functional requirements: First, by directly opening the second solenoid valve 522 in the first branch 520 and closing the second diaphragm pump 531 and the third diaphragm pump 541, hot water can be added to the clean water tank 131; Second, by closing the second solenoid valve 522 and simultaneously opening the first diaphragm pump 521, the second diaphragm pump 531, and the third diaphragm pump 541, hot water can be powerfully cleaned by forcefully spraying it into the sewage tank 300 through the combined high-pressure jet of the first diaphragm pump 521, the second diaphragm pump 531, and the third diaphragm pump 541, thereby removing stubborn stains; Third, when simultaneously... When the second solenoid valve 522 and the third solenoid valve 532 are opened, the first diaphragm pump 521, the second diaphragm pump 531 and the third diaphragm pump 541 can simultaneously perform medium-temperature, medium-intensity cleaning of the sewage tank 300 and inject medium-temperature water into the clean water tank 131. Fourth, when the heating tube 570 is closed, and the second solenoid valve 522 and the third solenoid valve 532 are opened, the first diaphragm pump 521 and the second diaphragm pump 531 can be opened, room-temperature water can be added to the clean water tank 131 and room-temperature, light cleaning of the sewage tank 300 can be performed. Thus, more functions are achieved with fewer pipes and a higher jet water pressure can be provided for cleaning the sewage tank 300.

[0043] Additionally, a water tank mounting groove 121 is provided on the body 120. The wastewater tank 300 is detachably installed in the water tank mounting groove 121. The bottom of the water tank mounting groove 121 is provided with a sewage discharge channel 122, a suction pipe 123, and a water valve connecting sleeve 124. The sewage discharge port 137 is located at the lower end of the sewage discharge channel 122, and the upper end of the sewage discharge channel 122 is provided with a sewage inlet 125. One end of the suction pipe 123 is connected to the bottom of the water tank mounting groove 121 and is provided with a rubber sealing cover 126. The opening of the rubber sealing cover 126 is provided with a flared flange 1267. The other end of the suction pipe 123 is close to the cleaning roller assembly 132 and is provided with a suction port 138, which is a long strip structure. A rubber floor scraper 170 is installed at the bottom edge; there are two or more water valve connecting sleeves 124, each of which is connected to the first water inlet 135 via a distribution valve 127; a drain outlet 301 is provided at the bottom of the sewage tank 300, and a sealing cover 320 is installed at the drain outlet 301. One end of the sealing cover 320 is rotatably connected to the bottom of the sewage tank 300 via a rotating shaft 321. A torsion spring 324 is installed on the rotating shaft 321. The restoring force of the torsion spring 324 can keep the sealing cover 320 closed when the sewage tank 300 is removed. The other end of the sealing cover 320 can rotate toward the bottom of the drain outlet 301 and is provided with a slot 322. The lower edge of the slot 322 is opposite to its upper edge. The sealing cover 320 has a rubber sealing gasket 323 on its top surface that matches the size of the drain outlet 301; an elastic plate 330 is installed on the side of the sewage tank 300, the middle of which is rotatably connected to the side of the sewage tank 300; one end of the elastic plate 330 has a claw 331 that matches the slot 322; a return spring 332 is installed between the other end of the elastic plate 330 and the side of the sewage tank 300; when the sewage tank 300 and the water tank mounting groove 121 are assembled together, the drain outlet 301 and the sealing cover 320 are both located above the sewage inlet 125; a rotating block 340 is also fixedly installed at the end of the rotating shaft 321. The rotating block 340 has a fan-shaped structure. An arc-shaped limiting groove 341 is provided on one side of the rotating block 340, and a limiting surface 342 is provided on the other side of the rotating block 340. The curvature center of the arc-shaped limiting groove 341 coincides with the axis of the rotating shaft 321. A first servo motor 350 is installed inside the fuselage 120. The output shaft of the first servo motor 350 coincides with the axis of the rotating shaft 321 and an eccentric wheel 351 is installed. A cylindrical pin 352 is installed on the eccentric wheel 351. The distance between the axis of the cylindrical pin 352 and the axis of the eccentric wheel 351 is consistent with the curvature radius of the arc-shaped limiting groove 341. When the first servo motor 350 drives the eccentric to rotate, the cylindrical pin 352 can be inserted into the arc-shaped limiting groove 341 or abut against the limiting surface 342 to drive the sealing cover 320 to close or open.The fuselage 120 is also equipped with an electric push rod 360. When the end of the electric push rod 360 extends outward, it can abut against and push the other end of the elastic clamping plate 330, thereby separating the clamping claw 331 from the clamping slot 322.

[0044] More in detail, such as Figure 9 As shown, the number and position of the spray valve assembly 310 correspond to the number and position of the water valve connecting sleeve 124. The spray valve assembly 310 includes: a first valve seat 311, a positioning ring 312, a first connecting nozzle 313, a first sealing part 314, a spring bracket 315, a tension spring 316, and a valve core 317. The positioning ring 312 and the first connecting nozzle 313 are fixedly installed at the bottom of the sewage tank 300. The first connecting nozzle 313 is located at the center of the positioning ring 312 and its outer periphery is fitted with an O-ring seal. The first connecting nozzle 313 passes through the positioning ring 312. A first water passage 3131 is provided. A first valve seat 311 is fixedly installed inside the sewage tank 300. A first sealing part 314 and a spring bracket 315 are both fixedly installed inside the first valve seat 311. The first sealing part 314 is located above the spring bracket 315. A second water passage 3141 is provided in the first sealing part 314. A first water passage hole 3151 is provided in the middle of the spring bracket 315. A spring tie beam 3152 is provided at the first water passage hole 3151. The two ends of the spring tie beam 3152 are connected to the first water passage hole 315. The valve core 317 is fixedly connected to the two side walls of the valve core 317. A spring pull ring 3171 is provided at the bottom of the valve core 317. A first inverted conical surface 3142 is provided at the top of the first sealing part 314. A second inverted conical surface 3172 matching the first inverted conical surface 3142 is provided on the outer side of the valve core 317. The two ends of the tension spring 316 are fixedly connected to the spring pull ring 3171 and the spring pull beam 3152, respectively. The tension spring 316 can pull the valve core 317 towards the top of the first sealing part 314 and make the second inverted conical surface 3172 match the first inverted conical surface 3142. The valve core 317 has multiple water passage grooves 3173 around its top surface. The water passage grooves 3173 pass through the edge of the top surface of the valve core 317 and the edge of the second inverted conical surface 3172. The cross-section of the water passage groove 3173 is a long linear structure and the extension of its center line can intersect on the axis of the valve core 317. When the sewage tank 300 and the water tank mounting groove 121 are assembled together, the positioning ring 312 can be fitted around the outer periphery of the water valve connecting sleeve 124 and the first connecting nozzle 313 can be inserted into the water valve connecting sleeve 124.

[0045] In addition, such as Figure 7As shown in more detail, the inner side of the sewage tank 300 is inclined towards the inside of the sewage tank 300 and a return water pipe 370 is fixedly installed. One end of the return water pipe 370 extends towards the top of the sewage tank 300 and a guide rod 371 is provided on its end face. The axis of the guide rod 371 is perpendicular to the end face. A slidable baffle 372 is fitted on the guide rod 371. The bottom of the baffle 372 can cover the pipe opening of one end of the return water pipe 370. The other end of the return water pipe 370 extends vertically downward from the bottom of the sewage tank 300. When the sewage tank 300 and the water tank mounting groove 121 are assembled together, the other end of the return water pipe 370 can extend into the rubber sealing cover 126 and the flange 1267 can abut against the bottom of the sewage tank 300.

[0046] In summary, the self-cleaning floor scrubber in this embodiment has a spray valve assembly 310 and a first water inlet 135 connected to it at the bottom of the wastewater tank 300. When the main unit 100 and the cleaning base station 200 are installed together, the wastewater tank interface 213 on the cleaning base station 200 is connected to the first water inlet 135. High-pressure water flow can be provided to the spray valve assembly 310 through the water supply pipeline 500, thereby performing high-pressure deep cleaning of the inner wall of the wastewater tank 300. In addition, a heating pipe 570 is also provided in the water supply pipeline 500, so that the water can be heated and added to the clean water tank 131 or directly sprayed at high pressure onto the inner wall of the wastewater tank 300. With the addition of cleaning agent in the water bucket 220, the floor cleaning effect and the deep cleaning effect of the wastewater tank 300 can be improved.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. A self-cleaning floor scrubber, comprising a main unit and a cleaning base station, characterized in that: The main unit includes a body, a ground crawler, and a handle. The body houses a wastewater tank, a power battery, and a vacuum blower. The ground crawler includes a clean water tank, a cleaning roller assembly, a booster wheel assembly, and casters. The bottom of the ground crawler has a first water inlet, a second water inlet, a drain outlet, and a suction outlet. The bottom of the wastewater tank is connected to the drain outlet and the suction outlet. A water spray valve assembly is installed at the bottom of the wastewater tank and is connected to the first water inlet. The bottom of the clean water tank has a first one-way valve and a second one-way valve. The first one-way valve is connected to the second water inlet, and the second one-way valve is connected to the cleaning roller assembly. The cleaning base station includes a base and a water tank. The top of the base is provided with a sewage trough, a clean water tank interface, and a wastewater tank interface. The main unit can be placed on the top of the base. The first water inlet interface is connected to the wastewater tank interface, and the second water inlet interface is connected to the clean water tank interface. The sewage trough is located below the sewage outlet, and a drain pipe is provided at the bottom of the sewage trough. The base is provided with a water filling pipe and a water supply pipe. The outlet end of the water filling pipe and the inlet end of the water supply pipe are connected to the bottom of the water tank through a third one-way valve. The inlet end of the water filling pipe is provided with a third water inlet interface, and the outlet end of the water supply pipe is connected to the clean water tank interface and the wastewater tank interface, respectively.

2. The self-cleaning floor scrubber according to claim 1, characterized in that, A first solenoid valve is installed in the water supply pipeline; a liquid level sensor is installed in the sewage discharge tank.

3. The self-cleaning floor scrubber according to claim 1, characterized in that, The water supply pipeline includes a main pipe, a first branch pipe, and a second branch pipe; the inlet end of the first branch pipe and the inlet end of the second branch pipe are both connected to the end of the main pipe, the outlet end of the first branch pipe is connected to the clean water tank interface, and a first diaphragm pump and a second solenoid valve are sequentially arranged from the inlet end to the outlet end of the first branch pipe; the outlet end of the second branch pipe is connected to the wastewater tank interface, and a second diaphragm pump and a third solenoid valve are sequentially arranged from the inlet end to the outlet end of the second branch pipe.

4. The self-cleaning floor scrubber according to claim 3, characterized in that, The water supply pipeline also includes a return water pipeline. The inlet of the return water pipeline is connected to the side of the first branch line through a three-way pipe, and the connection is located between the first diaphragm pump and the second solenoid valve. The outlet of the return water pipeline is connected to the main pipeline, the first branch line and the second branch line through a four-way pipe. A third diaphragm pump and a fourth check valve are sequentially arranged from the inlet to the outlet of the return water pipeline.

5. The self-cleaning floor scrubber according to claim 4, characterized in that, The first branch circuit is equipped with a heating tube, which is located between the three-way pipe and the first diaphragm valve.

6. The self-cleaning floor scrubber according to claim 1, characterized in that, The machine body has a water tank mounting groove, and the wastewater tank is detachably installed in the water tank mounting groove. The bottom of the water tank mounting groove is provided with a sewage discharge channel, a sewage suction pipe, and a water valve connecting sleeve. The sewage discharge port is located at the lower end of the sewage discharge channel, and the upper end of the sewage discharge channel is provided with a sewage inlet. One end of the sewage suction pipe is connected to the bottom of the water tank mounting groove and is provided with a rubber sealing cover. The opening of the rubber sealing cover is provided with a flange. The other end of the sewage suction pipe is close to the cleaning roller assembly and is provided with a sewage suction port. The bottom edge of the sewage suction port is provided with a rubber floor scraper. There are two or more water valve connecting sleeves, and each water valve connecting sleeve is connected to the first water inlet through a distribution valve.

7. The self-cleaning floor scrubber according to claim 6, characterized in that, The number and position of the spray valve assembly correspond to the number and position of the water valve connecting sleeve. Each spray valve assembly includes: a first valve seat, a positioning ring, a first connecting nozzle, a first sealing part, a spring bracket, a tension spring, and a valve core. The positioning ring and the first connecting nozzle are fixedly disposed at the bottom of the sewage tank. The first connecting nozzle is located at the center of the positioning ring and has a first water passage. The first valve seat is fixedly disposed inside the sewage tank. The first sealing part and the spring bracket are fixedly installed inside the first valve seat. The first sealing part has a second water passage. The spring bracket has a first water passage hole, and a spring tension beam is provided at the first water passage hole. The valve core... A spring pull ring is provided at the bottom, a first inverted conical surface is provided at the top of the first sealing part, and a second inverted conical surface matching the first inverted conical surface is provided on the outer side of the valve core. The two ends of the tension spring are fixedly connected to the spring pull ring and the spring pull beam, respectively. The tension spring can pull the valve core towards the top of the first sealing part and make the second inverted conical surface fit tightly with the first inverted conical surface. Several water passage grooves are opened around the top surface of the valve core, and the water passage grooves pass through the top surface of the valve core and the second inverted conical surface. When the sewage tank and the water tank mounting groove are assembled together, the positioning ring can be fitted around the outer circumference of the water valve connecting sleeve and the first connecting nozzle can be inserted into the water valve connecting sleeve.

8. The self-cleaning floor scrubber according to claim 6, characterized in that, The sewage tank has a drain outlet at its bottom, and a sealing cover is provided at the drain outlet. One end of the sealing cover is rotatably connected to the bottom of the sewage tank via a pivot and is equipped with a torsion spring. The other end of the sealing cover can rotate toward the bottom of the drain outlet and is provided with a groove. A rubber sealing gasket matching the size of the drain outlet is provided on the sealing cover. An elastic retaining plate is provided on the side of the sewage tank. The middle part of the elastic retaining plate is rotatably connected to the side of the sewage tank. One end of the elastic retaining plate is provided with a retaining claw matching the groove. A return spring is installed between the other end of the elastic retaining plate and the side of the sewage tank. When the sewage tank and the water tank mounting groove are assembled together, the drain outlet and the sealing cover are located above the sewage inlet.

9. The self-cleaning floor scrubber according to claim 8, characterized in that, The rotating shaft has a rotating block at its end. One side of the rotating block has an arc-shaped limiting groove, and the other side of the rotating block has a limiting surface. The center of curvature of the arc-shaped limiting groove coincides with the axis of the rotating shaft. The fuselage has a first servo motor. The output shaft of the first servo motor has an eccentric wheel. The eccentric wheel has a cylindrical pin. When the first servo motor drives the eccentric wheel to rotate, the cylindrical pin can be engaged in the arc-shaped limiting groove or abut against the limiting surface to drive the sealing cover to close or open. The fuselage is also equipped with an electric push rod. When the end of the electric push rod extends outward, it can abut against the other end of the elastic plate and push it, thereby separating the claw from the slot.

10. The self-cleaning floor scrubber according to claim 6, characterized in that, The vacuum blower is connected to the top of the sewage tank. A return water pipe is provided inside the sewage tank. One end of the return water pipe extends towards the top of the sewage tank and a guide rod is provided at the end face. A slidable baffle is provided on the guide rod. The bottom of the baffle can cover the opening of one end of the return water pipe. The other end of the return water pipe extends downward from the bottom of the sewage tank. When the sewage tank and the water tank mounting groove are assembled together, the other end of the return water pipe can extend into the rubber sealing cover and the flange can abut against the bottom of the sewage tank.

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