Self-cleaning method of cleaning equipment and cleaning equipment

Abstract

The invention belongs to the technical field of smart home, and discloses a self-cleaning method of cleaning equipment and the cleaning equipment. The cleaning equipment comprises a cleaning head, the cleaning head comprises a machine head, a front rolling brush and a rear rolling brush, the front rolling brush and the rear rolling brush are rotationally arranged on the bottom face of the machine head, and a rear scraper abutting against the rear rolling brush is arranged on the front side of the rear rolling brush. The back rolling brush and the front rolling brush are defined to rotate in the forward direction when the cleaning equipment cleans the to-be-cleaned surface. The self-cleaning method of the cleaning equipment comprises a first cleaning stage and a second cleaning stage. The first cleaning stage comprises the steps that cleaning liquid is supplied to the rear side of the rear rolling brush; the rear rolling brush rotates reversely, and the reverse rotation of the rear rolling brush is that the rear side of the rear rolling brush bypasses the upper side to rotate towards the front side; absorbing and removing sewage; the second cleaning stage comprises the steps that cleaning liquid is supplied to the rear side of the rear rolling brush; the front rolling brush and the rear rolling brush rotate in the forward direction, and the front rolling brush rotates in the forward direction from the rear side of the front rolling brush to the front side by bypassing the upper portion. According to the cleaning method, the front rolling brush and the rear rolling brush can be cleaned, and the cleaning effect is good.

Description

Technical Field

[0001] The present invention relates to the field of smart home technology, and in particular to a self-cleaning method for a cleaning device and a cleaning device. Background Art

[0002] A floor scrubber is a cleaning machine that is suitable for cleaning hard floors while sucking out wastewater and taking it away from the site. It has the advantages of being environmentally friendly, energy-saving, and highly efficient. With the iteration and update of products, a "double-roller brush water machine" with a self-cleaning function has appeared on the market. This type of product includes two roller brushes set in front and back. The front roller brush is used for mopping the floor, and the rear roller brush is used for polishing to achieve a cleaning effect. At present, the roller brush in the "double-roller brush water machine" can achieve self-cleaning in the base station.

[0003] When cleaning the roller brush of the existing base station, it is generally believed that the function of the rear roller brush is to polish, and it does not come into contact with stains and does not need to be cleaned. Therefore, water is sprayed from the front side of the front roller brush, and the water gathers at the front roller brush to clean only the front roller brush. However, in actual use, the rear roller brush will inevitably come into contact with dirt, resulting in the rear roller brush being unable to be cleaned, thereby affecting the use effect of the floor scrubber. Summary of the invention

[0004] The object of the present invention is to provide a self-cleaning method for a cleaning device and a cleaning device, which can solve the problem of poor cleaning effects of a front roller brush and a rear roller brush.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A self-cleaning method for a cleaning device, the cleaning device comprising a cleaning head, the cleaning head comprising a machine head and a front roller brush and a rear roller brush rotatably arranged on the bottom surface of the machine head, the front side of the rear roller brush being provided with a rear scraper abutting against the rear roller brush;

[0007] It is defined that when the cleaning device cleans the surface to be cleaned, the rear roller brush and the front roller brush both rotate in a positive direction, and the self-cleaning method of the cleaning device includes a first cleaning stage and a second cleaning stage;

[0008] The first cleaning stage includes:

[0009] supplying cleaning fluid to the rear side of the rear roller brush;

[0010] The rear roller brush rotates in the reverse direction, wherein the rear roller brush rotates in the reverse direction by the rear side of the rear roller brush passing over the top and rotating toward the front side;

[0011] Vacuuming sewage;

[0012] The second cleaning stage includes:

[0013] supplying cleaning fluid to the rear side of the rear roller brush;

[0014] The front roller brush and the rear roller brush both rotate in a positive direction, wherein the front roller brush rotates in a positive direction by the rear side of the front roller brush bypassing the top and rotating toward the front side.

[0015] As an optional solution to the self-cleaning method of the above cleaning device, the rear side of the front roller brush is provided with comb teeth abutting against the front roller brush, and in the first cleaning stage, the front roller brush rotates in the opposite direction while the rear roller brush rotates in the opposite direction.

[0016] As an optional solution of the self-cleaning method of the cleaning equipment, the suction and removal of sewage in the first cleaning stage includes:

[0017] The front roller brush and the rear roller brush both rotate intermittently in a positive direction;

[0018] During the forward rotation of the front roller brush and the rear roller brush, the dust suction motor in the cleaning device is started at intervals.

[0019] As an optional solution of the self-cleaning method of the above cleaning equipment, the second cleaning stage also includes sucking out the sewage, and the sucking out of the sewage in the second cleaning stage includes:

[0020] The front roller brush and the rear roller brush rotate forward and reverse alternately;

[0021] During the forward rotation of the front roller brush and the rear roller brush, starting the dust suction motor in the cleaning device;

[0022] The dust collection motor is turned off when the front roller brush and the rear roller brush rotate in opposite directions.

[0023] As an optional solution of the self-cleaning method of the cleaning device, the power of the dust suction motor is gradually increased.

[0024] As an optional solution of the self-cleaning method of the cleaning device, the time for supplying the cleaning liquid in the second cleaning stage is longer than the time for supplying the cleaning liquid in the first cleaning stage.

[0025] As an optional scheme of the self-cleaning method of the above-mentioned cleaning device, the second cleaning stage also includes a drying stage. During the drying stage, the fan and the heating element in the cleaning head are started, and the front roller brush and the rear roller brush rotate intermittently.

[0026] As an optional solution of the self-cleaning method of the above-mentioned cleaning device, in the drying stage, the fan is started earlier than the heating element, and the fan is turned off later than the heating element.

[0027] As an optional solution of the self-cleaning method of the cleaning device, in the drying stage, if a user input instruction is received or it is detected that the cleaning head is lifted, the fan and the heating element are turned off.

[0028] A cleaning device comprises a controller, a cleaning head and a base station for docking with the cleaning head;

[0029] The cleaning head comprises a machine head and a front roller brush and a rear roller brush rotatably arranged on the bottom surface of the machine head, and a rear scraper abutting against the rear roller brush is arranged on the front side of the rear roller brush;

[0030] The base station comprises a base body, a cleaning groove for accommodating a cleaning head is arranged on the base body, a flow channel is arranged in the circumferential side wall of the cleaning groove, a liquid inlet connected to the flow channel is arranged on the front side wall of the cleaning groove, the liquid inlet can be directly opposite to the liquid spraying port on the cleaning head, and a liquid outlet connected to the flow channel is arranged on the rear side wall of the cleaning groove;

[0031] The controller is configured with a computer program, and the computer program is used to execute the self-cleaning method of the cleaning device mentioned above.

[0032] As an optional solution of the above-mentioned cleaning equipment, the cleaning head also includes a clean water tank and a water pump arranged in the head, the clean water tank is connected to the liquid spray port, and the water pump is used to drive the liquid in the clean water tank to flow to the liquid spray port.

[0033] As an optional solution for the above-mentioned cleaning equipment, a motor and a reduction gearbox are provided in the machine head, and the motor and the reduction gearbox are located between the front roller brush and the rear roller brush. The reduction gearbox is provided with two output ends, and the motor is transmission connected to the reduction gearbox, one of the two output ends is transmission connected to the front roller brush, and the other is transmission connected to the rear roller brush.

[0034] As an optional solution of the above cleaning device, the water pump is located between the front roller brush and the rear roller brush, and the motor and the water pump are arranged along the axial direction of the front roller brush.

[0035] As an optional solution of the above cleaning equipment, the cleaning equipment also includes:

[0036] A body assembly is detachably connected to the cleaning head, a sewage pipe is provided in the cleaning head, one end of the sewage pipe is connected to the bottom surface of the cleaning head and is located between the front roller brush and the rear roller brush, and the body assembly includes a sewage tank, the inlet of the sewage tank can be connected to the other end of the sewage pipe;

[0037] A handle assembly, the bottom end of which is detachably connected to the body assembly;

[0038] A handheld component is detachably mounted on the handle component, a filter channel is arranged inside the handheld component, and the filter channel can be communicated with the outlet of the sewage tank.

[0039] As an optional solution of the above cleaning device, a fixed end is provided on the base body, and the fixed end is detachably electrically connected to the body assembly.

[0040] As an optional solution of the above cleaning device, the liquid outlet and the rear scraper are both lower than the axis height of the rear roller brush.

[0041] As an optional solution of the above cleaning device, an auxiliary roller is rotatably provided on the bottom surface of the head, the auxiliary roller is located between the front roller brush and the rear roller brush, and the auxiliary roller protrudes from the bottom surface of the head.

[0042] As an optional solution of the above-mentioned cleaning equipment, a flange is provided in the cleaning tank, and the flange is used to support the bottom surface of the head between the front roller brush and the rear roller brush so that the bottom surface of the head is spaced apart from the upper surface of the cleaning tank.

[0043] As an optional solution of the above cleaning device, the distance between the axis of the front roller brush and the axis of the rear roller brush is M, the dimension of the flange along the front-to-back direction is L, and the ratio of L to M is 0.3-0.75.

[0044] As an optional solution of the above cleaning device, the dimension of the flange along the left-right direction is 3mm-10mm.

[0045] As an optional solution of the above cleaning device, the flange includes horizontal supporting ribs, and the horizontal supporting ribs extend horizontally.

[0046] As an optional solution of the above-mentioned cleaning device, the flange also includes vertical supporting ribs, the vertical supporting ribs are connected to the bottom surface of the horizontal supporting ribs, and the vertical supporting ribs are abutted or connected to the upper surface of the cleaning tank.

[0047] As an optional solution of the above cleaning device, the flange includes at least two vertical supporting ribs, and the at least two vertical supporting ribs are arranged at intervals.

[0048] As an optional solution of the above cleaning device, the height of the top surface of the flange is lower than the height of the top end surface of the base.

[0049] As an optional solution of the above cleaning device, the flanges are provided on opposite sides of the cleaning tank;

[0050] A cover body protrusion is arranged at a position corresponding to each flange on the top end surface of the seat body, and the cover body protrusion includes a guiding inclined surface, two guiding inclined surfaces are arranged opposite to each other, and the distance between the two guiding inclined surfaces gradually decreases from top to bottom.

[0051] As an optional solution of the above cleaning device, the base station further includes a drying component, an air duct is arranged in the base body, the drying component is arranged in the air duct, and the drying component includes a fan;

[0052] An air outlet communicated with the air duct is arranged on the side wall of the cleaning tank, and the air outlet is located between the front roller brush and the rear roller brush.

[0053] As an optional solution of the above cleaning device, the air outlets are provided on the side walls on both sides of the cleaning tank.

[0054] As an optional solution of the above-mentioned cleaning device, the shape and size of the cleaning groove are adapted to the cleaning head so that a fluid flow cavity is formed between the cleaning groove and the cleaning head, and the fluid flow cavity is located between the front roller brush and the rear roller brush.

[0055] As an optional scheme for the above-mentioned cleaning equipment, the bottom surface of the cleaning groove has a front cleaning area b cooperating with the front roller brush and a rear cleaning area a cooperating with the rear roller brush, the front cleaning area b and the rear cleaning area a are connected by a guide surface, and the front end height of the guide surface is lower than the rear end height of the guide surface.

[0056] As an optional solution of the above cleaning device, the front cleaning area b and the rear cleaning area a are both provided with multiple rows of protrusions, and the protrusions in two adjacent rows are arranged alternately.

[0057] As an optional solution of the above cleaning device, the spacing between two adjacent rows of protrusions is smaller than the radial dimension of the protrusions;

[0058] Alternatively, the number of the plurality of rows of protrusions decreases gradually from the back to the front.

[0059] As an optional solution of the above-mentioned cleaning device, the height of the front cleaning area b gradually increases from the projection position of the axis of the front roller brush on the bottom surface of the cleaning groove to the front and rear ends.

[0060] As an optional solution of the above cleaning device, an overflow channel is provided on the seat body, one end of the overflow channel is connected to the cleaning tank, and the other end of the overflow channel is connected to the outer wall of the seat body.

[0061] As an optional solution of the above cleaning equipment, the overflow channel is arranged at the front end of the front cleaning area b.

[0062] Beneficial effects of the present invention:

[0063] In the cleaning method of the cleaning equipment provided by the present invention, the first cleaning stage is used to clean the rear roller brush, and the cleaning liquid can be gathered between the scraper and the rear roller brush to improve the cleaning effect on the rear roller brush. The sewage passing through the rear roller brush is used to soak the front roller brush, which is beneficial to improve the utilization rate of water resources. In the second cleaning stage, the rear roller brush has been cleaned and the surface is clean. The rear roller brush only serves as a carrier of the cleaning liquid, driving the cleaning liquid to flow to the front side to contact with the front roller brush to clean the front roller brush. The cleaning method provided by the present invention can clean both the front roller brush and the rear roller brush, and has a good cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 This is a schematic diagram of the partial structure of the cleaning device provided by the present invention. Figure 1 ;

[0065] Figure 2 This is a schematic diagram of the partial structure of the cleaning device provided by the present invention. Figure 2 ;

[0066] Figure 3 It is a cross-sectional view of the cleaning head provided by the present invention when the front roller brush and the rear roller brush are rotating in opposite directions;

[0067] Figure 4 It is a cross-sectional view of the cleaning head provided by the present invention when the front roller brush and the rear roller brush are both rotating in the forward direction;

[0068] Figure 5 This is a cross-sectional view of the cleaning head provided by the present invention when it is located on the base station. Figure 1 ;

[0069] Figure 6 is a cross-sectional view of a portion of the structure of the cleaning head provided by the present invention;

[0070] Figure 7 yes Figure 6 A partial enlarged view of point D in the middle;

[0071] Figure 8 It is a structural schematic diagram of the floor scrubber provided by the present invention;

[0072] Fig. 9 is a cross-sectional view of the floor scrubber provided by the present invention;

[0073] Fig.10 is an exploded view of the floor scrubber provided by the present invention;

[0074] Fig.11 is a cross-sectional view of a cleaning head provided by the present invention;

[0075] Fig.12 The structure of the base station provided by the present invention is shown in FIG. Figure 1 ;

[0076] Fig.13 The structure of the base station provided by the present invention is shown in FIG. Figure 2 ;

[0077] Fig.14 is a top view of a base station provided by the present invention;

[0078] Fig.15 yes Fig.14 Middle AA section view;

[0079] Fig.16 It is a schematic diagram of the structure of the cleaning head provided by the present invention;

[0080] Fig.17 It is a schematic structural diagram of the base station provided by the present invention when the cover body is not assembled;

[0081] Fig.18 This is a cross-sectional view of the cleaning head provided by the present invention when it is located on the base station. Figure 2 ;

[0082] Fig.19 is an exploded view of the cleaning head provided by the present invention;

[0083] Fig. 20 is a cross-sectional view of a partial structure of a base station provided by the present invention;

[0084] Fig.21 This is a cross-sectional view of the cleaning head provided by the present invention when it is located on the base station. Figure 3 ;

[0085] Fig. 22 yes Fig.21 A partial enlarged view of point C in the middle;

[0086] Fig.23 It is a structural schematic diagram of a flange provided by the present invention;

[0087] Fig.24 is a schematic structural diagram of another flange provided by the present invention;

[0088] Fig.25 It is a cross-sectional view of a base station provided by the present invention.

[0089] In the figure:

[0090] 100, base station; 11, seat body; 111, upper cover; 1111, protrusion; 1112, drainage groove; 11121, first drainage section; 11122, second drainage section; 11123, third drainage section; 1113, guide rib; 1114, guide surface; 1115, upper cover; 11151, folding edge; 1116, inner side plate; 1117, outer side plate; 1118, groove bottom plate; 1119, wind guide cover; 112, bottom shell; 113, cover body; 1131, flange; 11311, horizontal support rib; 11312, vertical support rib; 1132, Shield body protrusion; 114, liquid inlet; 115, liquid outlet; 116, air outlet; 117, air duct; 118, overflow channel; 12, drying component; 121, fan; 122, heating element; 13, fixed end; 200, cleaning head; 21, front roller brush; 22, rear roller brush; 23, front scraper; 24, rear scraper; 25, comb teeth; 251, intercepting part; 252, combing part; 26, sewage pipe; 271, motor; 272, gear reduction box; 28, water pump; 29, auxiliary roller; 300, fuselage assembly; 400, handheld assembly; 500, handle assembly. DETAILED DESCRIPTION

[0091] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0092] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0094] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0095] Embodiment 1

[0096] This embodiment provides a self-cleaning method for a cleaning device, such as Figure 1-Figure 3 As shown, the cleaning equipment includes a floor scrubber and a base station 100. The floor scrubber includes a cleaning head 200, and the cleaning head 200 includes a machine head and a front roller brush 21 and a rear roller brush 22 rotatably arranged at the bottom of the machine head. When the user uses the floor scrubber, the front roller brush 21 and the rear roller brush 22 are arranged front and back, and the front roller brush 21 first contacts the stains on the surface to be cleaned, that is, the front roller brush 21 is used as a cleaning roller brush, and the rear roller brush 22 is used as a polishing roller brush to improve the cleaning effect. A rear scraper 24 abutting against the rear roller brush 22 is provided on the front side of the rear roller brush 22. The base station 100 is used to dock the cleaning head 200 of the floor scrubber, and has the function of cleaning and drying the cleaning head 200. The self-cleaning method in this embodiment includes a first cleaning stage and a second cleaning stage. The first cleaning stage mainly cleans the rear roller brush 22, and the second cleaning stage mainly cleans the front roller brush 21. Since the rear roller brush 22 is less exposed to dirt, the rear roller brush 22 is cleaned first, which shortens the cleaning time. Moreover, the sewage generated by the cleaned rear roller brush 22 has a low degree of dirtiness and can be used to clean the front roller brush 21 .

[0097] In the first cleaning stage, the cleaning liquid is first supplied to the rear side of the rear roller brush 22, so that at least a portion of the rear roller brush 22 is immersed in the cleaning liquid, and the rear roller brush 22 is fully moistened, which is beneficial to improving the cleaning effect of the rear roller brush 22. Figure 3 The rear roller brush 22 rotates counterclockwise at the angle shown in the figure), that is, the rear roller brush 22 rotates from its rear side around the top to the front side. During the reverse rotation of the rear roller brush 22, the cleaning liquid can be driven to flow along the outer peripheral surface of the rear roller brush 22, so that at least part of the cleaning liquid is driven to the front side of the rear roller brush 22 and is blocked by the rear scraper 24. The cleaning liquid gathers on the rear scraper 24, that is, gathers in the space enclosed by the rear scraper 24 and the shell of the machine head, which can ensure that the cleaning liquid is in full contact with the rear roller brush 22, and as the rear roller brush 22 rotates, the rear roller brush 22 is fully cleaned. It should be noted here that in the first cleaning stage, at least part of the cleaning liquid will flow forward to contact the front roller brush 21, which plays a role in wetting the front roller brush 21, which is beneficial to improving the cleaning effect of the front roller brush 21.

[0098] It should be noted here that the above-mentioned rotation direction is opposite to the rotation direction of the scrubber when it is normally cleaning the floor. Figure 4 As shown, when the floor scrubber is working normally to clean the floor, the front roller brush 21 rotates forward, and the rear roller brush 22 also rotates forward. The rotation direction is as shown in FIG. Figure 4 Indicated by the arrow.

[0099] Furthermore, if Figure 5 As shown, the heights of the rear scraper 24 and the outlet 115 of the cleaning liquid are lower than the axis of the rear roller brush 22, and the rear scraper 24 and the outlet 115 are located on opposite sides of the rear roller brush 22. When the rear roller brush 22 rotates forward, the cleaning liquid can only soak the lower end of the rear roller brush 22, and the outer peripheral surface of the rear roller brush 22, which is about one-fourth of the area, is soaked. The position of the rear roller brush 22 soaked in the cleaning liquid is squeezed by the rear scraper 24 after a small rotation angle, and the cleaning liquid cannot stay on the rear roller brush 22 for a long time after the roller brush 22 rotates backward; when the rear roller brush 22 rotates backward, the cleaning liquid carried by the lower end of the rear roller brush 22 is squeezed by the rear scraper 24 after a large rotation angle, and the cleaning liquid can basically soak the rear roller brush 22 all the time. Therefore, the water utilization rate of the rear roller brush 22 is higher when the rear roller brush 22 rotates backward than when it rotates forward.

[0100] It can be understood that when the floor scrubber cleans the floor normally, the front roller brush 21 rotates forward. During this process, the front roller brush 21 contacts the surface to be cleaned, driving the hair and other garbage on the surface to rotate. The garbage will move upward from the rear side of the front roller brush 21 and gather on the comb teeth 25, thereby preventing the garbage from secondary contamination of the surface to be cleaned.

[0101] In order to improve the cleaning effect of the front roller brush 21, in the first cleaning stage, the front roller brush 21 also rotates in the opposite direction. It should be noted here that in the first cleaning stage, the rotation direction of the front roller brush 21 is opposite to the rotation direction of the front roller brush 21 during normal cleaning of the floor scrubber. The front roller brush 21 rotates in the opposite direction to bring the hair and other dirt usually gathered on the comb teeth 25 to the front roller brush 21 by contacting with the comb teeth 25 on the rear side of the front roller brush 21, so that the hair and other dirt fall into the base station 100 with the front roller brush 21 and mix with the sewage.

[0102] Specifically, Figure 6 and Figure 7As shown, the comb teeth 25 include an intercepting portion 251 and a combing portion 252. The intercepting portion 251 is connected to the housing of the machine head. The intercepting portion 251 is a convex structure, and its length direction is the axial direction of the front roller brush 21. The combing portion 252 is arranged at the bottom end of the intercepting portion 251. The combing portion 252 includes a plurality of teeth arranged at intervals, and the teeth extend vertically downward and contact the front roller brush 21. When the floor scrubber is working normally to clean the floor, the front roller brush 21 rotates forward, and the combing portion 252 is located upstream of the intercepting portion 251 to collect hair and other garbage. The intercepting portion 251 squeezes the outer periphery of the front roller brush 21, and as the vacuum motor in the floor scrubber is started, sewage and garbage are sucked into the sewage pipe 26 to prevent sewage and garbage from secondary contamination of the surface to be cleaned. When the base station 100 is connected to the cleaning head 200 of the floor scrubber, when the front roller brush 21 rotates forward, the combing part 252 is located upstream of the intercepting part 251 to collect hair and other garbage. The intercepting part 251 squeezes the outer periphery of the front roller brush 21. If the vacuum motor is started, sewage and part of the garbage are sucked into the sewage pipe 26. When the front roller brush 21 rotates reversely, the cleaning liquid can rotate with the front roller brush 21 and be blocked by the intercepting part 251, so that more cleaning liquid is gathered in the space enclosed by the front roller brush 21 and the intercepting part 251, so as to improve the cleaning effect of the front roller brush 21.

[0103] In the first cleaning stage, the front roller brush 21 rotates in the reverse direction, the bottom end of the front roller brush 21 contacts the cleaning liquid, and drives the cleaning liquid to rotate upward from the front side, so that the cleaning liquid can be squeezed by the interception part 251 after the front roller brush 21 rotates at a large angle, which can extend the time of the cleaning liquid on the front roller brush 21, thereby improving the cleaning effect. And as the front roller brush 21 rotates in the reverse direction, the hair and garbage collected on the combing part 252 can be wiped off.

[0104] In this embodiment, the first cleaning stage is used to clean the rear roller brush 22 and clean the hair and other dirt on the front roller brush 21 and the comb teeth 25. The sewage passing through the rear roller brush 22 is used to soak and rinse the hair and other dirt, which is beneficial to improve the utilization rate of water resources and will not cause secondary pollution to the front roller brush 21.

[0105] Finally, the generated sewage is sucked out to avoid secondary contamination of the rear roller brush 22 by the generated sewage. It should be noted here that when the cleaning head 200 is placed on the base station 100, the fluid flow cavity enclosed between the cleaning head 200 and the base station 100 is relatively closed, and the fluid flow cavity is connected to the sewage discharge pipe 26 in the cleaning head 200, so that the sewage in the cavity can be discharged by vacuum suction.

[0106] After the first cleaning stage, the second cleaning stage begins. In the second cleaning stage, cleaning liquid is re-supplied to the rear side of the rear roller brush 22. By providing new cleaning liquid for cleaning, the front roller brush 21 and the rear roller brush 22 can be prevented from being contaminated again.

[0107] After that, the front roller brush 21 and the rear roller brush 22 both rotate in the forward direction, and the forward rotation direction is the rotation direction of the roller brush when the floor scrubber cleans the floor. Specifically, the front roller brush 21 rotates from the rear side of the front roller brush 21 around the top to the front side (in order to Figure 4 The rear roller brush 22 rotates counterclockwise from the front side of the rear roller brush 22 around the top to the rear side (at an angle of 1.30°). Figure 4 In this process, the rear roller brush 22 has been cleaned and its surface is clean. In the first cleaning stage, the rear scraper 24 squeezes the rear roller brush 22, and the contact area between the cleaning liquid and the rear roller brush 22 is greater than one-fourth of the outer peripheral surface of the rear roller brush 22. In the second cleaning stage, the rear roller brush 22 only acts as a carrier of the cleaning liquid, driving the cleaning liquid to flow quickly to the front side to contact with the front roller brush 21 and clean the front roller brush 21. In the first cleaning stage, the hair and other dirt on the front roller brush 21 and the comb teeth 25 have been preliminarily cleaned. In the second cleaning stage, the front roller brush 21 rotates and deeply contacts with the cleaning liquid, which can fully clean the front roller brush 21.

[0108] Finally, the sewage is sucked out to prevent the sewage from secondarily contaminating the front roller brush 21 and the rear roller brush 22 .

[0109] When sucking out the sewage in the first cleaning stage, the front roller brush 21 and the rear roller brush 22 both rotate forward intermittently, that is, after rotating forward for a specified time, they pause for a preset time and then rotate forward again. During the forward rotation of the front roller brush 21 and the rear roller brush 22, the sewage can be driven between the front roller brush 21 and the rear roller brush 22, so that it can enter the sewage pipe 26 from the entrance of the sewage pipe 26 at the bottom of the machine head under the drive of the vacuum motor. Furthermore, the surface height of the front roller brush 21 in contact with the base station 100 is relatively low, so that the sewage is close to the front roller brush 21, thereby better draining the sewage.

[0110] During the forward rotation of the front roller brush 21 and the rear roller brush 22, the dust suction motor in the floor scrubber is started at intervals. By starting the dust suction motor at intervals, the sewage can be sucked out in multiple times, thereby improving the sewage removal effect.

[0111] Furthermore, the power of the dust suction motor is gradually increased so that the adsorption force on the sewage is increased as the sewage decreases, which is beneficial to discharge the sewage.

[0112] When sucking out sewage in the second cleaning stage, the front roller brush 21 and the rear roller brush 22 rotate forward and reverse alternately. For example, the front roller brush 21 and the rear roller brush 22 rotate forward first, and then rotate reversely. During the forward rotation of the front roller brush 21 and the rear roller brush 22, the dust suction motor in the cleaning head 200 is started to suck the sewage accumulated between the front roller brush 21 and the rear roller brush 22 into the sewage pipe 26. When the front roller brush 21 and the rear roller brush 22 rotate reversely, the dust suction motor is turned off, and the front roller brush 21 and the rear roller brush 22 rotate reversely, which can bring the water located at the front side of the front roller brush 21 and the rear side of the rear roller brush 22 into the space between the front roller brush 21 and the rear roller brush 22 through the outer peripheral surfaces of the front roller brush 21 and the rear roller brush 22, so as to improve the sewage discharge effect.

[0113] Optionally, when sucking out the sewage in the second cleaning stage, the power of the dust suction motor is gradually increased so that the adsorption force on the sewage is increased as the sewage decreases, which is conducive to draining the sewage.

[0114] Since the front roller brush 21 is dirtier than the rear roller brush 22 , in order to improve the cleaning effect of the front roller brush 21 , the time for supplying cleaning liquid in the second cleaning stage is longer than the time for supplying cleaning liquid in the first cleaning stage, so as to provide sufficient cleaning liquid for cleaning the front roller brush 21 .

[0115] After the front roller brush 21 and the rear roller brush 22 are cleaned, they enter the drying stage to keep the front roller brush 21 and the rear roller brush 22 in a dry state to avoid generating odor or breeding bacteria. The second cleaning stage also includes a drying stage, during which the fan 121 and the heating element 122 in the cleaning head 200 are started, and the front roller brush 21 and the rear roller brush 22 rotate intermittently. By starting the fan 121 and the heating element 122, hot air can be generated, and the hot air contacts the rotating front roller brush 21 and the rear roller brush 22, so that the front roller brush 21 and the rear roller brush 22 can be dried, and the drying efficiency is high.

[0116] Optionally, the heating element 122 may be a PTC heating element 122 .

[0117] Furthermore, in the drying stage, the fan 121 is started earlier than the heater 122 , and the fan 121 is shut down later than the heater 122 , to ensure that the heat is fully utilized, which is also beneficial to maintaining the life of the fan 121 and the heater 122 .

[0118] In order to ensure the safety of use during the drying process, when a user input command is received (for example, when a switch button or a speed adjustment button is triggered), the fan 121 and the heating element 122 are turned off, and the floor scrubber enters a charging state or a standby state.

[0119] Furthermore, when it is detected that the cleaning head 200 is lifted out of the base station 100, the fan 121 and the heating element 122 are turned off, and the floor scrubber enters a standby state to ensure user safety.

[0120] In some embodiments, the drying component 12 may include only the fan 121 without the heater 122 , and the front roller brush 21 and the rear roller brush 22 may be dried only by driving the air flow through the fan 121 .

[0121] Embodiment 2

[0122] This embodiment provides a self-cleaning method for a cleaning device, including a first cleaning stage, a second cleaning stage and a drying stage.

[0123] In the first cleaning stage, the cleaning liquid is supplied to the rear side of the rear roller brush 22 by the water pump for 20 seconds. During this process, the front roller brush 21 and the rear roller brush 22 do not rotate, and the dust collection motor is not started.

[0124] The front roller brush 21 and the rear roller brush 22 rotate in the opposite direction for 13 seconds, and the water pump and the dust suction motor do not work. The rear roller brush 22 rotates in the opposite direction to collect the cleaning liquid on the rear scraper 24, so that the cleaning liquid is fully in contact with the rear roller brush 22. The front roller brush 21 rotates in the opposite direction to collect hair and other dirt that usually collects on the comb teeth 25 onto the front roller brush 21, and drops into the sewage as the front roller brush 21 rotates.

[0125] The water pump does not work, the dust suction motor starts, and the front roller brush 21 and the rear roller brush 22 rotate forward for 5 seconds. During this process, most of the sewage is sucked into the sewage pipe 26 by the dust suction motor. At this time, the frequency of the dust suction motor is 50HZ, the power is 150W, and the efficiency is 65%.

[0126] After a pause of 1 second, the water pump and the dust suction motor are not started, and the front roller brush 21 and the rear roller brush 22 rotate forward and continue for 5 seconds, so that the sewage is gathered between the front roller brush 21 and the rear roller brush 22.

[0127] After a pause of 1 second, the water pump and the dust collecting motor are not started, and the front roller brush 21 and the rear roller brush 22 rotate forwardly for 13 seconds.

[0128] The water pump does not start, the dust-collecting motor starts, and the front roller brush 21 and the rear roller brush 22 rotate forward, and continue for 10s. At this moment, the frequency of the dust-collecting motor is 50HZ, the power is 250W, and the efficiency is 75%.

[0129] In the second cleaning stage, the cleaning liquid is supplied to the rear side of the rear roller brush 22 by the water pump for 30 seconds. During this process, the front roller brush 21 and the rear roller brush 22 do not rotate, and the dust collection motor is not started.

[0130] The front roller brush 21 and the rear roller brush 22 rotate forward for 13 seconds, and the water pump and the dust suction motor are not working. The rear roller brush 22 rotates forward to drive the cleaning liquid toward the front roller brush 21, so that the cleaning liquid fully contacts the front roller brush 21, and cleans the front roller brush 21 as the front roller brush 21 rotates.

[0131] The water pump does not work, the dust suction motor starts, and the front roller brush 21 and the rear roller brush 22 rotate forward for 5 seconds. During this process, most of the sewage is sucked into the sewage pipe 26 by the dust suction motor. At this time, the frequency of the dust suction motor is 50HZ, the power is 150W, and the efficiency is 65%.

[0132] After a pause of 1 second, the water pump and the dust suction motor are not started, and the front roller brush 21 and the rear roller brush 22 rotate in the opposite direction for 5 seconds, so that the sewage is gathered between the front roller brush 21 and the rear roller brush 22.

[0133] After a pause of 1 second, the water pump and the dust collecting motor are not started, and the front roller brush 21 and the rear roller brush 22 rotate forwardly for 13 seconds.

[0134] The water pump does not start, the dust-collecting motor starts, and the front roller brush 21 and the rear roller brush 22 rotate forward, and continue for 10s. At this time, the frequency of the dust-collecting motor is 50HZ, the power is 150W, and the efficiency is 65%.

[0135] The water pump does not start, the dust-collecting motor starts, and the front roller brush 21 and the rear roller brush 22 rotate forward, and continue for 15s. At this moment, the frequency of the dust-collecting motor is 50HZ, the power is 250W, and the efficiency is 75%.

[0136] The user enters the drying stage after pressing a speed adjustment button (eg, a speed adjustment button for a roller brush).

[0137] In the drying stage, the fan 121 and the heating element 122 are started, and the front roller brush 21 and the rear roller brush 22 rotate for 5 ms every 3 minutes, and repeat 40 times. After that, the fan 121 and the heating element 122 are turned off, and the scrubber returns to the charging mode.

[0138] Among them, after entering the drying stage, after the fan 121 is started, the heating element 122 delays 20 seconds to enter the working state; at the end of the drying stage, the heating element 122 is turned off first, and the fan 121 delays working for 3 minutes.

[0139] If the on / off key or speed control key of the floor scrubber is triggered during the drying process, the drying stage is immediately ended and the washing machine returns to the charging state. The heating element 122 stops working immediately, the front roller brush 21 and the rear roller brush 22 stop rotating immediately, and the fan 121 delays working for 3 minutes.

[0140] If the floor scrubber is picked up from the base station 100 during the drying process, the drying stage is immediately terminated and the machine returns to the standby state. The heating element 122 stops working immediately, the front roller brush 21 and the rear roller brush 22 stop rotating immediately, and the fan 121 delays working for 3 minutes.

[0141] In other embodiments, the working parameters of the vacuum motor and the duration of each stage can be set according to actual needs.

[0142] Embodiment 3

[0143] This embodiment provides a cleaning device, including a controller, a floor scrubber and a base station. Figure 8-Figure 9 As shown, the floor scrubber includes a cleaning head 200, a body assembly 300, a handheld assembly 400 and a handle assembly 500. The cleaning head 200 is arranged at the bottom of the body assembly 300, the bottom of the handle assembly 500 is connected to the body assembly 300, and the handheld assembly 400 is installed on the handle assembly 500 and can be connected to the body assembly 300. The user pushes and pulls the handle assembly 500 to drive the cleaning head 200 to move on the ground to achieve cleaning. The body assembly 300 is integrated with a sewage tank, which is connected to the cleaning head 200. The handheld assembly 400 is provided with a dust suction channel. The sewage and air flow enter the body assembly 300 through the cleaning head 200, and the sewage and solid garbage are collected in the sewage tank. The gas and some dust enter the handheld assembly 400 through the dust suction channel. After the dust is filtered by the handheld assembly 400, the relatively clean air is discharged through the handheld assembly 400.

[0144] Because the body assembly 300 of the existing floor scrubber integrates the sewage tank, the clean water tank, the handle and the power source of the handheld assembly, the body assembly 300 is very heavy and difficult to disassemble; in addition, after disassembling the body assembly 300, the body assembly 300 is unstable as a whole, and the sewage in the sewage tank is easy to pour out. At the same time, the detachable structure leads to poor sealing of the air duct. Therefore, the body assembly 300 of the floor scrubber in the prior art is generally not detachable, which makes it difficult to clean the cleaning head 200 and makes the floor scrubber inconvenient to store as a whole.

[0145] To solve the above problem, in this embodiment, Fig.10 As shown, the body assembly 300 and the cleaning head 200, the handheld assembly 400 and the handle assembly 500 are all detachably connected, the handheld assembly 400 and the handle assembly 500 are detachably connected, and a reverse flow valve is provided in the sewage tank, which can prevent the sewage from overflowing when the sewage tank is dumped. In addition, the clean water tank is integrated on the cleaning head 200, which saves the length of the fluid transport pipeline and facilitates the cleaning head 200 to spray water on the ground when cleaning the ground.

[0146] When the cleaning head 200 needs to be cleaned, the handheld component 400 and the handle component 500 can be removed first, and then the body component 300 integrated with the sewage tank can be pulled out together, or the body component 300 integrated with the sewage tank and the cleaning head 200 can be removed to clean the roller brush and the sewage pipe 26 at the bottom of the cleaning head 200.

[0147] The cleaning head 200 includes a machine head and a front roller brush 21 and a rear roller brush 22 rotatably arranged at the bottom of the machine head. The front side of the rear roller brush 22 is provided with a rear scraper 24 abutting against the rear roller brush 22, and the rear side of the front roller brush 21 is provided with a comb tooth 25 abutting against the front roller brush 21.

[0148] like Fig.11 As shown, a motor 271, a gear reduction box 272 and a water pump 28 are provided in the machine head. A liquid spraying port is provided on the front side of the machine head, and the liquid spraying port is in fluid communication with the clean water tank. The water pump 28 is used to drive the water in the clean water tank to be sprayed out from the liquid spraying port. The motor 271 is respectively connected to the front roller brush 21 and the rear roller brush 22 through the gear reduction box 272. Specifically, the motor 271 is located between the front roller brush 21 and the rear roller brush 22, and the output shaft of the motor 271 is parallel to the axis of the front roller brush 21, so that the space between the front roller brush 21 and the rear roller brush 22 is fully utilized for installation. Compared with integrating the motor 271 in the roller brush, the motor 271 in this embodiment is arranged between the front roller brush 21 and the rear roller brush 22, which can reduce the radial size of the roller brush, is conducive to the rational use of space, and reduces the weight of the roller brush, thereby reducing the driving load of the motor 271.

[0149] Furthermore, the water pump 28 is disposed between the front roller brush 21 and the rear roller brush 22, and the water pump 28 and the motor 271 are respectively located at the axial ends of the front roller brush 21 to balance the weight of the cleaning head 200. When the user lifts the floor scrubber and places it on the base station 100, the cleaning head 200 can remain stable and fall into the base station 100. Fig.12 and Fig.13 As shown, the base station 100 includes a base body 11 and a fixed end 13, the fixed end 13 is arranged on the base body 11, the base body 11 is used to support the cleaning head 200, and the fixed end 13 is used to dock with the body assembly 300 of the floor scrubber to support the body assembly 300, thereby maintaining the stability of the floor scrubber. In addition, the fixed end 13 is in electrical contact with the body assembly 300, so that the base station 100 can charge the body assembly 300.

[0150] Among them, the base body 11 is provided with a cleaning tank for accommodating the cleaning head 200, and the base station 100 is provided with a flow channel around the circumference of the cleaning tank. The front side wall of the cleaning tank is provided with a liquid inlet 114 connected to the flow channel, and the liquid inlet 114 can receive the liquid sprayed from the liquid spray port on the cleaning head 200, and the rear side wall of the cleaning tank is provided with a liquid outlet 115 connected to the flow channel, so that the liquid in the flow channel passes through the rear roller brush 22 and the front roller brush 21 in sequence. In this embodiment, the front roller brush 21 and the rear roller brush 22 are located in the cleaning tank during the cleaning process to prevent the cleaning liquid from overflowing. The liquid sprayed from the cleaning head 200 passes through the flow channel and flows through the rear roller brush 22 and the front roller brush 21 in sequence. The rear roller brush 22 contacts less stains and is better cleaned. The liquid passing through the rear roller brush 22 contacts the front roller brush 21 for cleaning, which can improve the cleaning effect of the front roller brush 21 and the rear roller brush 22.

[0151] The controller is configured with a computer program, and the computer program is used to execute the self-cleaning method of the cleaning device in the first or second embodiment.

[0152] In this embodiment, the flow channel structure is simple, which is conducive to reducing costs. In addition, the liquid inlet 114 is arranged on the front side wall of the cleaning tank, which is at a higher position and will not be blocked by the cleaning head 200 and the dirt cleaned out, and is not easy to be blocked.

[0153] To improve the cleaning effect, the axial dimension of the liquid outlet 115 along the rear roller brush 22 is 1 / 3 to 1 / 2 of the axial dimension of the rear roller brush 22 to ensure sufficient liquid discharge, which is beneficial for the cleaning liquid to fully diffuse along the axial direction of the rear roller brush 22 to contact the rear roller brush 22 and the front roller brush 21.

[0154] In this embodiment, the axial dimension of the liquid outlet 115 along the rear roller brush 22 is 117 mm, and the axial dimension of the rear roller brush 22 is 259 mm.

[0155] In order to prevent the sewage from flowing back after contacting the front roller brush 21 and contacting the rear roller brush 22, as shown in FIG. Fig.14 and Fig.15 As shown, the bottom surface of the cleaning tank has a front cleaning area b that cooperates with the front roller brush 21 and a rear cleaning area a that cooperates with the rear roller brush 22. The front cleaning area b and the rear cleaning area a are connected by a guide surface 1114, and the front end height of the guide surface 1114 is lower than the rear end height of the guide surface 1114. The front cleaning area b and the rear cleaning area a are connected by the guide surface 1114, and the guide surface 1114 is low in the front and high in the back, so that the liquid flowing out of the liquid outlet 115 can flow forward under the action of gravity, and the sewage that contacts the front roller brush 21 will not contact the rear roller brush 22, so as to avoid secondary contamination of the rear roller brush 22.

[0156] Optionally, the angle between the guide surface 1114 and the horizontal plane is 1°-5°. Within this range, the angle is moderate and the water flow speed is moderate, which can avoid the problem of too fast water flow speed due to a large angle, thereby affecting the cleaning effect, and can also avoid the problem of water backflow due to a small angle. In this embodiment, the angle between the guide surface 1114 and the horizontal plane is preferably 2°. In other embodiments, the angle between the guide surface 1114 and the horizontal plane can be adjusted according to actual needs, such as 3° or 4°.

[0157] Optionally, the rear cleaning area a may also be configured as a structure with a low front and a high rear to avoid residual cleaning liquid in the rear cleaning area a.

[0158] In this embodiment, Fig.16As shown, the machine head includes a casing, and the bottom surface of the casing is provided with a front installation area, a connecting portion and a rear installation area in sequence from front to rear. The front roller brush 21 is rotatably arranged in the front installation area, and the rear roller brush 22 is rotatably arranged in the rear installation area. The connecting portion connects the front installation area and the rear installation area, and the connecting portion is arranged opposite to the guide surface 1114.

[0159] Furthermore, auxiliary rollers 29 are rotatably provided at both the front and rear ends of the connection part, and the auxiliary rollers 29 are used for auxiliary support when the floor scrubber is working to reduce movement resistance. When the cleaning head 200 is placed on the base station 100, the cleaning head 200 is supported by the base station 100, so that the auxiliary rollers 29 protrude from the bottom surface of the head and are suspended, so that a water channel is formed between the connection part and the guide surface 1114, so that the liquid flows from the rear cleaning area a to the front cleaning area b.

[0160] To improve the cleaning effect, Fig.17 As shown, both the front cleaning area b and the rear cleaning area a are provided with multiple rows of protrusions 1111, and the multiple protrusions 1111 in the same row are arranged at intervals along the axial direction of the roller brush, and the two adjacent rows of protrusions 1111 are arranged in a staggered manner. On the one hand, the protrusions 1111 can massage the roller brush to play a cleaning role, and on the other hand, the staggered protrusions 1111 can play a diversion role, so that the liquid is evenly distributed in the rear cleaning area a, ensuring that the liquid flowing out of the liquid outlet 115 can be dispersed to the left and right sides in sequence, so that the liquid is evenly in contact with the rear roller brush 22.

[0161] In this embodiment, the protrusion 1111 is a spherical protrusion with a smooth surface without edges or concave corners, and has a good effect on the diversion of the liquid.

[0162] In order to disperse the liquid more evenly and quickly, the spacing between two adjacent rows of protrusions 1111 is smaller than the radial dimension of the protrusions 1111, so that after the liquid is diverted by one row of protrusions 1111, it can contact with another row of protrusions 1111 set in an offset manner as soon as possible, thereby ensuring uniform distribution of the liquid through multiple diversions.

[0163] Furthermore, the number of the multiple rows of protrusions 1111 gradually decreases from the back to the front, so as to guide the liquid to gather toward the front side and prevent the liquid from entering the air outlet 116.

[0164] To remove wastewater from cleaning processes, such as Fig.18 As shown, the cleaning head 200 is also provided with a sewage pipe 26, one end of which is connected to the front installation area at the bottom of the machine head, and is located between the front roller brush 21 and the rear roller brush 22, and is arranged toward the front roller brush 21, and the other end of the sewage pipe 26 is connected to the sewage tank and the handheld component 400 on the floor scrubber in sequence. During the cleaning process, the handheld component 400 is started to generate negative pressure in the front installation area to suck the sewage into the sewage pipe 26, and collect it in the sewage tank through the sewage pipe 26.

[0165] In order to improve the recovery effect of the sewage after cleaning, the height of the projection of the front cleaning area b on the plane perpendicular to the axis of the front roller brush 21 gradually increases toward the front and rear ends with the axis of the front roller brush 21 as the center. That is, the front and rear ends of the front cleaning area b are high, and the middle height is low. This arrangement enables the liquid flowing into the front cleaning area b to be gathered in the middle of the front cleaning area b, so as to be easily sucked into the sewage pipe.

[0166] In this embodiment, combined with Fig.15 , Fig.17 and Fig.19 As shown, the seat 11 includes a shell and an annular cover 113, and the shell includes an upper cover 111 and a bottom shell 112. The cleaning tank is arranged on the upper cover 111, and a drainage groove 1112 is arranged on the upper cover 111 around the outer periphery of the cleaning tank, and the drainage groove 1112 constitutes a flow channel; the annular cover 113 is arranged on the upper cover 111, and at least covers the outside of the drainage groove 1112. By setting the cover 113, the drainage groove 1112 can be shielded, so that the flow channel is hidden, dust accumulation in the flow channel can be avoided, and the flow channel is ensured to be open.

[0167] Further, the drainage groove 1112 includes a first drainage section 11121, a second drainage section 11122 and a third drainage section 11123 which are connected in sequence. The first drainage section 11121 is arranged at the front side of the shell, and the first drainage section 11121 extends in the left-right direction, the head end of the first drainage section 11121 is connected to the liquid inlet 114, and the tail end of the first drainage section 11121 extends toward the edge of the shell in the left-right direction. The second drainage section 11122 extends in the front-back direction, the head end of the second drainage section 11122 is connected to the tail end of the first drainage section 11121, and the tail end of the second drainage section 11122 is connected to the third drainage section 11123; the third drainage section 11123 extends in the left-right direction, the head end of the third drainage section 11123 is connected to the second drainage section 11122, and the tail end of the third drainage section 11123 is connected to the liquid outlet 115. The height of the first drainage section 11121 gradually decreases from the head end to the tail end, and the height of the second drainage section 11122 gradually decreases from the head end to the tail end, so as to guide the liquid in the drainage groove 1112 to flow from the liquid inlet 114 to the liquid outlet 115 under the action of gravity. Optionally, the height of the third drainage section 11123 can also be gradually reduced from the head end to the tail end, so as to further guide the liquid to flow into the cleaning groove through the liquid outlet 115.

[0168] In this embodiment, two groups of the first drainage section 11121, the second drainage section 11122 and the third drainage section 11123 are provided and symmetrically distributed, so that the two groups of the first drainage section 11121, the second drainage section 11122 and the third drainage section 11123 are respectively connected through the liquid inlet 114 and the liquid outlet 115 to form an annular flow channel. This arrangement enables the liquid provided by the liquid outlet 115 to fully flow into the cleaning tank to ensure that the liquid is fully in contact with the rear roller brush 22 and the front roller brush 21.

[0169] Furthermore, the height of the cover body 113 protruding from the bottom surface of the cleaning groove is 25mm-35mm, for example, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm or 34mm. This height range can ensure that the cleaning groove has a certain depth, improve the stability of the cleaning head 200 on the base station, and also help to improve the cleaning effect.

[0170] The inner side of the top surface of the cover body 113 is provided with a chamfer, and the chamfer forms an inclined surface, which can guide the liquid splashed thereon so that the liquid flows into the cleaning tank.

[0171] In some embodiments, the flow channel may be an exposed structure. For example, the cover body 113 is not provided, and the flow channel is formed only by the drainage groove 1112, which can also achieve the purpose of cleaning the roller brush.

[0172] like Figure 4 As shown, the cleaning head 200 further includes a front scraper 23, which is arranged on the bottom surface of the head and located at the rear side of the front roller brush 21, that is, the front scraper 23 is arranged at the front end of the connecting portion. When the cleaning head 200 is placed in the cleaning tank, a gap is provided between the upper surface of the cleaning tank and the front scraper 23. The gap can prevent the front scraper 23 from being deformed or losing flexibility due to backlog during the cleaning roller brush. The gap can also ensure that liquid and hot air can pass through to ensure the cleaning and drying effects.

[0173] Furthermore, in this embodiment, the base station 100 also has the function of drying the roller brush. The base station 100 also includes a drying component 12, and an air duct 117 is provided in the base body 11. The drying component 12 is arranged in the air duct 117 to provide hot air. Among them, the drying component 12 includes a fan 121 and a heating element 122, and the heating element 122 is arranged on the front side of the air outlet of the fan 121. After the fan 121 and the heating element 122 are started, the fan 121 drives the air flow, and the air flow is heated by the heating element 122 to form hot air. The hot air enters the air duct 117 and is blown to the front roller brush 21 and the rear roller brush 22 through the air duct 117 to achieve the purpose of drying.

[0174] In order to make full use of the hot air, an air outlet 116 connected to the air duct 117 is provided on the side wall of the cleaning tank, and the air outlet 116 is located between the front roller brush 21 and the rear roller brush 22. It can be understood that by setting the cleaning head 200 in the cleaning tank, a hot air chamber will be formed between the front roller brush 21 and the rear roller brush 22 through the cooperation of the cleaning tank and the machine head. The hot air chamber is a relatively closed space. After the hot air enters the space through the air outlet 116, it can contact the front roller brush 21 and the rear roller brush 22 respectively, and will not flow directly into the atmosphere, thereby ensuring that the hot air is in full contact with the front roller brush 21 and the rear roller brush 22, so as to shorten the drying time of the front roller brush 21 and the rear roller brush 22. It should be noted here that when cleaning and drying the cleaning head 200, the front roller brush 21 and the rear roller brush 22 can rotate so that the hot air and the liquid can fully contact the outer peripheral surface of the roller brush to improve the drying effect. In this embodiment, Fig.17 , Fig.19 and Fig.21 As shown, the housing includes a bottom shell 112 and an upper cover 111. The upper cover 111 is detachably connected to the bottom shell 112, and the bottom shell 112 and the upper cover 111 form an air duct 117, and the air outlet 116 is provided on the upper cover 111. The cleaning tank is provided on the upper cover 111, and a drainage groove 1112 is provided on the upper cover 111 around the outer periphery of the cleaning tank. The air duct 117 and the flow channel are integrated on the housing, and the structure is simple, which is conducive to reducing costs.

[0175] Specifically, Fig.19 As shown, the upper cover 111 includes an upper cover plate 1115, an inner side plate 1116, a groove bottom plate 1118, an outer side plate 1117 and an air guide cover 1119. The upper cover plate 1115 constitutes a cleaning groove, the inner side plate 1116 is arranged around the circumferential edge of the upper cover plate 1115, and a notch is arranged on the inner side plate 1116, forming a liquid outlet 115, a liquid inlet 114 and an air outlet 116 respectively. The outer side plate 1117 is arranged on the outer side of the inner side plate 1116, and the bottom of the outer side plate 1117 is connected to the inner side plate 1116 through the groove bottom plate 1118 to enclose the drainage groove 1112, and the groove bottom plate 1118 is connected to the upper cover plate 1115 where the liquid inlet 114 and the liquid outlet 115 are arranged so that the cleaning liquid can enter and exit. The air outlet 116 is arranged below the drainage groove 1112. The air guide cover 1119 is U-shaped and connected to the outer side plate 1117 to form a cylindrical structure, and the air outlet 116 is connected to the inside of the cylindrical structure. When the shell and the cover body 113 are assembled, the air duct 117 is connected to the inside of the cylindrical structure, and the cover body 113 blocks the top surface of the cylindrical structure.

[0176] like Fig. 20As shown, the upper cover plate 1115 is connected with an upwardly extending folded edge 11151 at the built-in connection corresponding to the air outlet 116, and the folded edge 11151 is located on the outside of the outer side plate 1117 and is spaced apart from the outer side plate 1117. By setting the folded edge 11151, it is possible to prevent the cleaning liquid from entering the interior of the shell through the air outlet 116 during the cleaning process of the front roller brush 21 and the rear roller brush 22, thereby avoiding damage to the electrical components inside the shell.

[0177] When drying the front roller brush 21 and the rear roller brush 22, the folded edge 11151 can guide the hot air to turn, so that the hot air in the air duct 117 can first pass over the folded edge 11151 upwards, and then return to pass between the folded edge 11151 and the outer side plate 1117 to enter the air outlet 116, thereby drying the front roller brush 21 and the rear roller brush 22. Optionally, the folded edge 11151 and the upper cover plate 1115 have a smooth transition to reduce wind energy loss.

[0178] Further, refer to Figure 20-Figure 22 As shown, a flange 1131 is provided in the cleaning tank, and the flange 1131 is used to abut against the bottom surface of the head of the cleaning head 200, so that a gap is provided between the bottom surface of the head and the upper surface of the cleaning tank to facilitate the flow of hot air. Specifically, a flange 1131 is provided on the cover body 113 around the air outlet 116, and the flange 1131 is used to abut against the bottom surface of the head between the front roller brush 21 and the rear roller brush 22, so that the cleaning tank, the head, the front roller brush 21 and the rear roller brush 22 can be surrounded to form a fluid flow cavity located between the front roller brush 21 and the rear roller brush 22, and the fluid flow cavity is connected to the air outlet 116, which can prevent the hot air from directly entering the atmosphere.

[0179] Among them, the surface materials of the front roller brush 21 and the rear roller brush 22 are flexible. When the cleaning head 200 is placed in the cleaning groove, the front roller brush 21 and the rear roller brush 22 are in contact with the upper surface of the cleaning groove. Under the action of the gravity of the cleaning head 200, the surfaces of the front roller brush 21 and the rear roller brush 22 are squeezed and deformed after contacting the cleaning groove, so that the front roller brush 21 and the rear roller brush 22 cooperate with the cleaning groove to form a relatively closed fluid flow cavity.

[0180] When the cleaning head 200 is placed in the base 100, the flange 1131 supports the bottom surface of the head, so that the auxiliary roller 29 is suspended in the cleaning tank, that is, a gap is provided between the bottom surface of the auxiliary roller 29 and the upper surface of the cleaning tank.

[0181] In addition, the flange 1131 can also play a role in positioning the cleaning head 200 to prevent the cleaning head 200 from tilting up, so that the liquid spray port on the cleaning head 200 is directly opposite to the liquid inlet 114.

[0182] In this embodiment, by providing the flange 1131 to support the cleaning head 200, a fluid flow cavity can be formed between the bottom surface of the head and the upper surface of the cleaning tank, and the fluid flow cavity is used for the flow of liquid or gas to achieve the effect of cleaning and drying; the flange 1131 abuts against the bottom surface of the head, and can also improve the sealing of the gap to prevent gas from overflowing or liquid from splashing. It can be understood that the height of the fluid flow cavity depends on the height of the flange 1131.

[0183] In this embodiment, Fig. 22 As shown, the flange 1131 is provided on the cover body 113, and the flange 1131 includes a horizontal support rib 11311, which is located above the air outlet 116 and extends substantially horizontally. Further, the flange 1131 also includes a vertical support rib 11312, at least two ends of the horizontal support rib 11311 are connected with the vertical support rib 11312, the vertical support rib 11312 is located below the horizontal support rib 11311, and the vertical support rib 11312 abuts against the upper cover plate 1115 to improve the strength of the flange 1131. Optionally, the number of the vertical support ribs 11312 can be set to at least two, and at least two vertical support ribs 11312 are arranged at intervals along the extension direction of the air outlet 116 to ensure ventilation.

[0184] The location and shape of the flange 1131 can be adjusted according to actual conditions. In some embodiments, the flange 1131 can be arranged on the housing, for example, on the inner side plate 1116 of the upper cover 111 .

[0185] In some embodiments, Fig.23 As shown, the flange 1131 may not be provided with horizontal support ribs 11311, but only includes at least two vertical support ribs 11312. The vertical support ribs 11312 may be connected to the inner side plate 1116 or the upper cover plate 1115 of the shell, or may be directly connected to the cover body 113.

[0186] In order to better improve the stability of the cleaning head 200 on the base station 100, Fig.16 and Fig.24 As shown, the distance between the axis of the front roller brush 21 and the axis of the rear roller brush 22 is defined as M, and the length L of the flange 1131 can be 0.3M-0.75M, so as to ensure that the flange 1131 has sufficient contact length with the bottom surface of the head, thereby improving the stability of the cleaning head 200. Exemplarily, the length L of the flange 1131 can be 0.3M, 0.35M, 0.4M, 0.45M, 0.5M, 0.55M, 0.6M, 0.65M, 0.7M, or 0.75M.

[0187] In order to further improve the stability of the flange 1131 in supporting the cleaning head 200, the width B of the flange 1131 is 3 mm-10 mm, so as to ensure that the flange 1131 has a certain contact area with the bottom surface of the head, which can not only improve the supporting effect, but also avoid damage to the flange 1131 or the bottom surface of the head due to excessive pressure. Exemplarily, the width B of the flange 1131 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0188] Furthermore, the top surface of the cover body 113 protrudes upward at a position corresponding to the air outlet 116 to form a cover body protrusion 1132. By providing the cover body protrusion 1132, the distance between the inner top surface of the cover body 113 and the bottom shell 112 can be increased, and the distance of the gas flowing upward in the air duct 117 can be increased, so that the airflow can be better turned back at the inner side surface of the cover body protrusion 1132 to change the flow direction, so that the airflow can further enter the air outlet 116 under the guidance of the folded edge 11151. Optionally, the protruding height of the cover body protrusion 1132 is 5mm-8mm, for example, 6mm or 7mm.

[0189] Furthermore, two cover protrusions 1132 are arranged on the cover 113 in a relative manner, and each cover protrusion 1132 has a guiding slope. The two guiding slopes are arranged in a relative manner, and the guiding slopes extend obliquely from top to bottom toward the center of the cleaning tank, so that the distance between the top ends of the two guiding slopes is large, and the distance between the bottom ends of the two guiding slopes is small. When placing the cleaning head 200, this arrangement allows the cleaning head 200 to move into the cleaning tank under the action of the two guiding slopes, so as to achieve the effect of initial positioning when placing the cleaning head 200 in the base station 100, and ensure that the cleaning head 200 can be placed in the cleaning tank.

[0190] In order to further ensure the drying effect, the top surface height of the flange 1131 is lower than the top surface height of the cover body 113, that is, the top surface height of the flange 1131 is lower than the height of the cover body protrusion 1132, so that when the user places the cleaning head 200, if there is an error operation that causes one end of the cleaning head 200 (the left end is taken as an example below) to overlap the top surface of the cover body 113, the cleaning head 200 will be tilted, and the right end of the cleaning head 200 will abut the bottom surface of the cleaning groove. At this time, the flange 1131 on the left and the air outlet 116 on the left are both located below the cleaning head 200. When the drying function is started at this time, the dry airflow provided by the left air outlet 116 can still contact the front roller brush 21 and the rear roller brush 22 on the cleaning head 200, thereby realizing a partial drying function.

[0191] In this embodiment, the distance between the axis of the front roller brush 21 and the axis of the rear roller brush 22 is 160 mm, the length of the flange 1131 is 80 mm, the height H of the flange 1131 is 7 mm, and the width B of the flange 1131 is 5 mm.

[0192] In order to make the roller brush dry evenly along the axial direction, air outlets 116 are provided on the left and right side walls of the cleaning tank. Hot air can enter from both axial ends of the roller brush. The hot air volume is large and the contact with the roller brush is more even, which is beneficial to improve the drying efficiency.

[0193] In order to evenly distribute the hot air passing through the heating element 122, Fig.25 As shown, a guide rib 1113 is also provided in the air duct 117. The guide rib 1113 may be an arc-shaped rib, and the guide rib 1113 extends from the heating element 122 to the air outlet 116 to guide the flow direction of the hot air. Furthermore, the air duct 117 and the guide rib 1113 are symmetrically arranged relative to the center line of the left and right directions of the base station 100 to make the hot air flow more uniform.

[0194] Further, refer to Fig.14 As shown, an overflow channel 118 is provided on the base station 100, and the overflow channel 118 is used to connect the cleaning tank with the bottom surface of the base station 100, so that when a large amount of cleaning liquid exists in the base station 100 and cannot be discharged in time, the water is discharged through the overflow channel 118 to avoid excessive cleaning liquid in the cleaning tank from entering the shell through the air outlet 116, thereby affecting the safe use of electrical components in the shell.

[0195] Specifically, the overflow channel 118 is arranged on the front side of the cleaning tank and connects the cleaning tank with the ground. Because the front and rear ends of the front cleaning area b are high and the middle height is low, the overflow channel 118 is located at a higher position on the bottom surface of the cleaning tank, which can not only ensure that a certain amount of cleaning liquid is retained in the cleaning tank, but also in special circumstances, such as when a user misoperates and pours a large amount of liquid into the cleaning tank, the liquid can be quickly discharged from the base station 100 to avoid damage to the electrical components in the base 100.

[0196] In the cleaning equipment provided in this embodiment, the base station 100 adopts a hidden flow channel, and the water sprayed by the water spraying device of the floor scrubber flows along the flow channel, so that the water flowing out of the liquid outlet 115 first contacts the rear roller brush 22, and then flows to the front roller brush 21 through the sloped guide surface 1114, so that both the front and rear roller brushes 22 can have a large amount of water for cleaning; through the air duct 117 set on the base station 100, hot air is introduced between the front roller brush 21 and the rear roller brush 22 for rapid drying, the drying effect is good, and the drying time is short.

[0197] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A self-cleaning method for a cleaning device, characterized in that: The cleaning device comprises a cleaning head (200), wherein the cleaning head (200) comprises a machine head and a front roller brush (21) and a rear roller brush (22) rotatably arranged on the bottom surface of the machine head, wherein a rear scraper (24) abutting against the rear roller brush (22) is arranged on the front side of the rear roller brush (22); It is defined that when the cleaning device cleans the surface to be cleaned, the rear roller brush (22) and the front roller brush (21) both rotate in a positive direction, and the self-cleaning method of the cleaning device includes a first cleaning stage and a second cleaning stage; The first cleaning stage includes: supplying cleaning fluid to the rear side of the rear roller brush (22); The rear roller brush (22) rotates in the reverse direction, wherein the rear roller brush (22) rotates in the reverse direction by the rear side of the rear roller brush (22) rotating around the top and toward the front side; Vacuuming sewage; The second cleaning stage includes: supplying cleaning fluid to the rear side of the rear roller brush (22); The front roller brush (21) and the rear roller brush (22) both rotate in a positive direction, wherein the front roller brush (21) rotates in a positive direction by the rear side of the front roller brush (21) passing over the top and rotating toward the front side.

2. The self-cleaning method of the cleaning equipment according to claim 1, characterized in that: The rear side of the front roller brush (21) is provided with comb teeth (25) that abut against the front roller brush (21); in the first cleaning stage, the front roller brush (21) rotates in the reverse direction while the rear roller brush (22) rotates in the reverse direction.

3. The self-cleaning method of the cleaning equipment according to claim 1, characterized in that: The suction and removal of sewage in the first cleaning stage includes: The front roller brush (21) and the rear roller brush (22) both rotate intermittently in a positive direction; During the forward rotation of the front roller brush (21) and the rear roller brush (22), the dust collecting motor in the cleaning device is started at intervals; Preferably, the second cleaning stage further comprises sucking out sewage, and the sucking out sewage in the second cleaning stage comprises: The front roller brush (21) and the rear roller brush (22) both rotate in a forward direction and in a reverse direction alternately; While the front roller brush (21) and the rear roller brush (22) are rotating in the forward direction, starting the dust suction motor in the cleaning device; When the front roller brush (21) and the rear roller brush (22) rotate in opposite directions, the dust collection motor is turned off; Preferably, the power of the dust suction motor increases gradually.

4. The self-cleaning method of a cleaning device according to any one of claims 1 to 3, characterized in that: The time for supplying the cleaning liquid in the second cleaning stage is longer than the time for supplying the cleaning liquid in the first cleaning stage.

5. The self-cleaning method of a cleaning device according to any one of claims 1 to 3, characterized in that: The second cleaning stage also includes a drying stage, during which the fan (121) and the heating element (122) in the cleaning head (200) are started, and the front roller brush (21) and the rear roller brush (22) rotate intermittently; Preferably, in the drying stage, the fan (121) is started earlier than the heating element (122), and the fan (121) is turned off later than the heating element (122); Preferably, in the drying stage, if a user input instruction is received or it is detected that the cleaning head (200) is lifted, the fan (121) and the heating element (122) are turned off.

6. A cleaning device, characterized in that: It comprises a controller, a cleaning head (200), and a base station (100) for docking with the cleaning head (200); The cleaning head (200) comprises a machine head, and a front roller brush (21) and a rear roller brush (22) rotatably arranged on the bottom surface of the machine head, wherein a rear scraper (24) abutting against the rear roller brush (22) is arranged on the front side of the rear roller brush (22); The base station (100) comprises a base body (11), the base body (11) being provided with a cleaning groove for accommodating a cleaning head (200), a flow channel being provided in a circumferential side wall of the cleaning groove, a liquid inlet (114) being provided on a front side wall of the cleaning groove and being communicated with the flow channel, the liquid inlet (114) being able to face a liquid spraying port on the cleaning head (200), and a liquid outlet (115) being provided on a rear side wall of the cleaning groove and being communicated with the flow channel; The controller is configured with a computer program, and the computer program is used to execute the self-cleaning method of the cleaning device according to any one of claims 1-5.

7. The cleaning device according to claim 10, characterized in that The cleaning head (200) further comprises a clean water tank and a water pump (28) arranged in the head, the clean water tank being in communication with the liquid spraying port, and the water pump (28) being used to drive the liquid in the clean water tank to flow toward the liquid spraying port; Preferably, a motor (271) and a reduction box are provided in the machine head, the motor (271) and the reduction box are located between the front roller brush (21) and the rear roller brush (22), the reduction box is provided with two output ends, the motor (271) is transmission-connected to the reduction box, one of the two output ends is transmission-connected to the front roller brush (21), and the other is transmission-connected to the rear roller brush (22); Preferably, the water pump (28) is located between the front roller brush (21) and the rear roller brush (22), and the motor (271) and the water pump (28) are arranged along the axial direction of the front roller brush (21); Preferably, the cleaning device further comprises: A body component is detachably connected to the cleaning head (200), a sewage pipe (26) is provided in the cleaning head (200), one end of the sewage pipe (26) is connected to the bottom surface of the cleaning head (200) and is located between the front roller brush (21) and the rear roller brush (22), and the body component includes a sewage tank, the inlet of which can be connected to the other end of the sewage pipe (26); A handle assembly, the bottom end of which is detachably connected to the body assembly; A handheld component, the handheld component can be detachably mounted on the handle component, a filter channel is arranged in the handheld component, and the filter channel can be communicated with the outlet of the sewage tank; Preferably, the seat body (11) is provided with a fixed end (13), and the fixed end (13) is detachably electrically connected to the fuselage assembly; Preferably, the liquid outlet (115) and the rear scraper (24) are both lower than the axis height of the rear roller brush (22); Preferably, an auxiliary roller (29) is rotatably provided on the bottom surface of the machine head, the auxiliary roller (29) is located between the front roller brush (21) and the rear roller brush (22), and the auxiliary roller (29) protrudes from the bottom surface of the machine head.

8. The cleaning device according to claim 6 or 7, characterized in that: A flange (1131) is provided in the cleaning tank, and the flange (1131) is used to support the bottom surface of the machine head between the front roller brush (21) and the rear roller brush (22), so that the bottom surface of the machine head is spaced apart from the upper surface of the cleaning tank; Preferably, the distance between the axis of the front roller brush (21) and the axis of the rear roller brush (22) is M, the dimension of the flange (1131) along the front-to-back direction is L, and the ratio of L to M is 0.3-0.75; Preferably, the flange (1131) has a size of 3 mm to 10 mm in the left-right direction; Preferably, the flange (1131) comprises horizontal support ribs (11311), and the horizontal support ribs (11311) extend horizontally; Preferably, the flange (1131) further comprises a vertical support rib (11311), the vertical support rib (11311) is connected to the bottom surface of the horizontal support rib (11311), and the vertical support rib (11312) is abutted or connected to the upper surface of the cleaning tank; Preferably, the flange (1131) comprises at least two vertical support ribs (11312), and the at least two vertical support ribs (11312) are arranged at intervals; Preferably, the top surface height of the flange (1131) is lower than the top end surface height of the seat body (11); Preferably, the flanges (1131) are provided on opposite sides of the cleaning tank; A cover body protrusion (1132) is provided at a position of the top end surface of the seat body (11) corresponding to each flange (1131), and the cover body protrusion (1132) includes a guiding inclined surface, the two guiding inclined surfaces are arranged opposite to each other, and the distance between the two guiding inclined surfaces gradually decreases from top to bottom.

9. The cleaning device according to claim 6 or 7, characterized in that: The base station further comprises a drying component (12); an air duct (117) is arranged in the base body (11); the drying component (12) is arranged in the air duct (117); and the drying component (12) comprises a fan (121); An air outlet (116) communicating with the air duct (117) is provided on the side wall of the cleaning tank, and the air outlet (116) is located between the front roller brush (21) and the rear roller brush (22); Preferably, the air outlet (116) is provided on the side walls on both sides of the cleaning tank; Preferably, the shape and size of the cleaning groove are adapted to the cleaning head (200), so that a fluid flow cavity is formed between the cleaning groove and the cleaning head (200), and the fluid flow cavity is located between the front roller brush (21) and the rear roller brush (22).

10. The cleaning device according to claim 6 or 7, characterized in that: The bottom surface of the cleaning groove comprises a front cleaning area b cooperating with the front roller brush (21) and a rear cleaning area a cooperating with the rear roller brush (22), the front cleaning area b and the rear cleaning area a being connected via a guide surface (1114), and the front end height of the guide surface (1114) is lower than the rear end height of the guide surface (1114); Preferably, the front cleaning area b and the rear cleaning area a are both provided with multiple rows of protrusions (1111), and the protrusions (1111) in two adjacent rows are arranged in a staggered manner; Preferably, the spacing between two adjacent rows of protrusions (1111) is smaller than the radial dimension of the protrusions (1111); Or, the number of the multiple rows of protrusions (1111) gradually decreases from back to front; Preferably, the height of the front cleaning area b gradually increases from the projection position of the axis of the front roller brush (21) on the bottom surface of the cleaning tank to the front and rear ends; Preferably, an overflow channel (118) is provided on the seat body (11), one end of the overflow channel (118) is connected to the cleaning tank, and the other end is connected to the outer wall of the seat body (11); Preferably, the overflow channel (118) is arranged at the front end of the front cleaning area b.

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