Cleaning device

Abstract

A cleaning device, including: a device main body, a drive assembly, a roller, a lifting assembly, and a wastewater collection assembly. The drive assembly is configured to drive the device main body to move along a surface to be cleaned for cleaning by the roller. The lifting assembly is configured to drive the roller to switch between a lowered position and a raised position; in a case where the roller is in the lowered position, the roller contacts the surface to be cleaned; in a case where the roller is in the raised position, the roller is separated from the surface to be cleaned. The wastewater collection assembly includes a water scrapper, and the water scrapper is configured to abut against the roller regardless of whether the roller is in the lowered position or the raised position, for scrapping out wastewater in the roller.

1 . A cleaning device, comprising:
 a device main body;   a drive assembly, connected to the device main body and configured to drive the device main body to move along a surface to be cleaned;   a roller, configured to clean the surface to be cleaned;   a lifting assembly, connected to the device main body and the roller for driving the roller to switch between a lowered position and a raised position; wherein in a case where the roller is in the lowered position, the roller contacts the surface to be cleaned; in a case where the roller is in the raised position, the roller is separated from the surface to be cleaned; and   a wastewater collection assembly; wherein the wastewater collection assembly comprises a water scrapper, and the water scrapper is configured to abut against the roller regardless of whether the roller is in the lowered position or the raised position, for scrapping out wastewater in the roller.   
     
     
         2 . The cleaning device according to  claim 1 , wherein the water scrapper is disposed at an intersection point between the roller when in the raised position and the roller when in the lowered position. 
     
     
         3 . The cleaning device according to  claim 1 , wherein the lifting assembly comprises a roller bracket and a lifting motor;
 the roller is rotatably connected to the roller bracket, and the roller bracket is rotatably connected to the device main body;   the lifting motor is connected to the roller bracket in a transmission manner and configured to drive the roller bracket to rotate relative to the device main body, for driving the roller to switch between the lowered position and the raised position.   
     
     
         4 . The cleaning device according to  claim 1 , wherein the wastewater collection assembly further comprises a wastewater collection trough configured to collect the wastewater scrapped out by the water scrapper;
 wherein the cleaning device further comprises a wastewater tank and a wastewater suction assembly;   the wastewater tank is connected to the device main body and defines an accommodation space for containing the wastewater; the wastewater collection trough is connected to the wastewater tank and in communication with the accommodation space;   the wastewater suction assembly is connected to the wastewater tank and configured to draw the wastewater in the wastewater collection trough into the accommodation space.   
     
     
         5 . The cleaning device according to  claim 4 , wherein a filter member is arranged within the wastewater collection trough, and the filter member is configured to filter the wastewater scraped out by the water scrapper; the filter member is detachably connected to the wastewater collection trough. 
     
     
         6 . The cleaning device according to  claim 4 , wherein the water scrapper and the wastewater collection trough are in a one-piece structure. 
     
     
         7 . The cleaning device according to  claim 4 , wherein the wastewater tank is arranged with a wastewater inlet and a drain outlet, and the wastewater inlet and the drain outlet are both in communication with the accommodation space;
 the wastewater suction assembly is configured to create a negative pressure within the wastewater tank to draw the wastewater collected by the wastewater collection assembly through the wastewater inlet into the accommodation space;   wherein the cleaning device further comprises a wastewater drainage assembly connected to the wastewater tank; the wastewater drainage assembly is configured to create a positive pressure within the wastewater tank to expel the wastewater from the accommodation space through the drain outlet.   
     
     
         8 . The cleaning device according to  claim 7 , wherein the wastewater tank is arranged with at least one connection port, and the at least one connection port is in communication with the accommodation space;
 the wastewater suction assembly comprises a wastewater suction pump and a gas inlet pipe connected to the wastewater suction pump; the drainage assembly comprises a wastewater drainage pump and a gas outlet pipe connected to the wastewater drainage pump;   wherein the at least one connection port is a connection port, and the gas inlet pipe and the gas outlet pipe are connected to the connection port through a three-way connector or a three-way control valve; or   wherein the at least one connection port is two connection ports; the gas inlet pipe is connected to one of the two connection ports, and the gas outlet pipe is connected to the other of the two connection ports.   
     
     
         9 . The cleaning device according to  claim 8 , wherein the wastewater suction assembly further comprises a first check valve disposed on a gas outlet of the wastewater suction pump; the first check valve is configured to allow gas to pass through the gas outlet of the wastewater suction pump and be discharged outside, while restricting external gas from entering through the gas outlet;
 the wastewater drainage assembly further comprises a second check valve disposed on the gas outlet pipe; the second check valve is configured to allow gas to flow from the wastewater drainage pump into the accommodation space, while restricting gas from flowing toward the wastewater drainage pump.   
     
     
         10 . The cleaning device according to  claim 8 , wherein the cleaning device further comprises a filter assembly detachably connected to the wastewater tank and disposed between the accommodation space and the connection port. 
     
     
         11 . The cleaning device according to  claim 7 , wherein the wastewater tank comprises a wastewater suction passage and a wastewater drainage passage; the accommodation space is in communication with the wastewater inlet through the wastewater suction passage, and the accommodation space is in communication with the drain outlet through the wastewater drainage passage;
 in a case where the negative pressure is generated within the wastewater tank by the wastewater suction assembly, the wastewater collected by the wastewater collection assembly enters the accommodation space through the wastewater suction passage; in a case where the positive pressure is generated within the wastewater tank by the wastewater drainage assembly, the wastewater contained in the accommodation space flows through the wastewater drainage passage to the drain outlet and is discharged from the wastewater tank through the drain outlet;   wherein the wastewater suction passage comprises a water inlet check valve assembly, and the water inlet check valve assembly is configured to allow fluid to flow from the wastewater inlet into the accommodation space, while restricting the fluid from flowing from the accommodation space into the wastewater inlet;   the wastewater drainage passage comprises a water outlet check valve assembly, and the water outlet check valve assembly is configured to allow fluid to flow from the wastewater tank toward the drain outlet, while restricting the fluid from flowing from the drain outlet into the accommodation space.   
     
     
         12 . The cleaning device according to  claim 11 , wherein the wastewater tank defines a first mounting slot matching the water inlet check valve assembly and a second mounting slot matching the water outlet check valve assembly; the water inlet check valve assembly is configured to be detachably inserted into the first mounting slot, and the water outlet check valve assembly is configured to be detachably inserted into the second mounting slot. 
     
     
         13 . The cleaning device according to  claim 8 , wherein the wastewater tank comprises a lower housing, and a first protrusion and a second protrusion that are disposed on a side of the lower housing away from the surface to be cleaned; the first protrusion and the second protrusion are separated by a through space;
 the accommodation space comprises a first accommodation space inside the lower housing, a second accommodation space inside the first protrusion, and a third accommodation space inside the second protrusion; wherein the second accommodation space and the third accommodation space are both in communication with the first accommodation space.   
     
     
         14 . The cleaning device according to  claim 13 , wherein a connecting pipe is further arranged inside the wastewater tank; an end of the connecting pipe is disposed within the second accommodation space, and another end of the connecting pipe is disposed within the third accommodation; the connecting pipe is configured to maintain air pressure in the second accommodation space and the third accommodation space in equilibrium. 
     
     
         15 . The cleaning device according to  claim 4 , wherein the wastewater tank is detachably connected to the device main body; the wastewater tank is arranged with at least two latch assemblies, which are spaced apart and mutually independent; each latch assembly comprises a latch; the device main body defines a latch slot that match the latch; the latch is configured to switch between a locked position and an unlocked position; in a case where the latch is in the locked position, the latch engages with the latch slot; in a case where the latch is in the unlocked position, the latch is separated from the latch slot. 
     
     
         16 . The cleaning device according to  claim 15 , wherein the wastewater tank defines a through hole, and the latch is movably arranged in the through hole;
 the latch comprises a button portion and a latching portion connected to the button portion;   wherein the latch assembly further comprises a support member and an elastic member; the support member is connected to the wastewater tank, and the elastic member is disposed between the support member and the latch; the elastic member is configured to push the latch to return from the unlocked position to the locked position; the button portion is configured to, in response to being pressed, drive the latch to move from the locked position to the unlocked position;   in a case where the latch is in the locked position, the latching portion engages with the latch slot;   in a case where the latch is in the unlocked position, the latching portion is separated from the latch slot.   
     
     
         17 . The cleaning device according to  claim 16 , wherein the wastewater tank comprises a lower housing, and a first protrusion and a second protrusion that are disposed on a side of the lower housing away from the surface to be cleaned; the first protrusion and the second protrusion are separated by a through space;
 a first accommodation space is defined inside the lower housing, a second accommodation space is defined inside the first protrusion, and a third accommodation space is defined inside the second protrusion; wherein the second accommodation space and the third accommodation space are both in communication with the first accommodation space; wherein,   at least one of the at least two latch assemblies is arranged on the first protrusion;   at least another one of the at least two latch assemblies is arranged on the second protrusion.   
     
     
         18 . The cleaning device according to  claim 17 , wherein a guide protrusion is arranged on one of the device main body and the wastewater tank, and a guide groove is defined on the other of the device main body and the wastewater tank; the guide protrusion is configured to be slidably engaged with the guide groove;
 the guide groove comprises two guide grooves, one of the two guide grooves is defined on the first protrusion, and the other of the two guide grooves is defined on the second protrusion; the two guide grooves are in communication with the through space;   the guide protrusion comprises two guide protrusions arranged on the device main body, and the two guide protrusions match the two guide grooves in a one-to-one correspondence.   
     
     
         19 . The cleaning device according to  claim 4 , wherein a span of the wastewater tank in an axial direction of the roller is greater than or equal to a length of the roller in the axial direction. 
     
     
         20 . The cleaning device according to  claim 4 , wherein the wastewater tank is disposed on a rear end of the device main body, and a direction in which the wastewater tank is mounted on the device main body is parallel to a forward-moving direction of the cleaning device.