CN220800908U - Cleaning assembly and cleaning system - Google Patents

Abstract

The application discloses a cleaning assembly and a cleaning system, and belongs to the technical field of cleaning systems. The cleaning assembly includes: the cleaning main body is provided with a front dirt sucking port and a rear dirt sucking port, and the cross section area of the front dirt sucking port is larger than that of the rear dirt sucking port; the rear roller is arranged on the cleaning main body and is suitable for guiding garbage to enter the rear dirt suction port; the rear scraping strip is arranged on the cleaning main body and comprises comb tooth parts, the comb tooth parts are propped against the rear roller, and the propped parts are positioned below the rear dirt absorbing opening. According to the cleaning assembly disclosed by the application, the rear scraping strip with the comb tooth parts is arranged at the smaller rear dirt sucking opening, and the comb tooth parts are propped against the rear roller, so that larger garbage on the rear roller can be scraped off, and the larger garbage is prevented from blocking the rear dirt sucking opening.

Description

Cleaning assembly and cleaning system

Technical Field

The application belongs to the technical field of cleaning systems, and particularly relates to a cleaning assembly and a cleaning system.

Background

Household cleaning equipment such as floor washing machines or floor sweeping robots can reduce or even relieve household burden and are favored by more and more users. In some cleaning devices, to enhance cleaning power, a front-to-rear soil pick-up port arrangement is typically provided, wherein the soil pick-up port of the front soil pick-up channel is larger than the soil pick-up port of the rear soil pick-up channel. Because the dirt sucking port of the rear dirt sucking channel is smaller, the rear dirt sucking channel is easy to be blocked by larger garbage.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a cleaning assembly and a cleaning system, which utilize comb teeth to scrape larger garbage on a rear roller, so as to avoid blocking a rear dirt suction port.

In a first aspect, the present application provides a cleaning assembly comprising:

The cleaning main body is provided with a front dirt sucking port and a rear dirt sucking port, and the cross section area of the front dirt sucking port is larger than that of the rear dirt sucking port;

The rear roller is arranged on the cleaning main body and is suitable for guiding garbage to enter the rear dirt suction port;

the rear scraping strip is arranged on the cleaning main body and comprises comb tooth parts, the comb tooth parts are propped against the rear roller, and the propped parts are positioned below the rear dirt absorbing opening.

According to the cleaning assembly disclosed by the application, the rear scraping strip with the comb tooth parts is arranged at the smaller rear dirt sucking opening, and the comb tooth parts are propped against the rear roller, so that larger garbage on the rear roller can be scraped off, and the larger garbage is prevented from blocking the rear dirt sucking opening.

According to one embodiment of the application, the rear wiper strip comprises:

The connecting plate is connected with the bottom plate of the cleaning main body;

the extending plate is connected with the connecting plate, and one side of the extending plate, which is close to the connecting plate, is higher than one side of the extending plate, which is far away from the connecting plate;

the comb tooth part is arranged on one side of the extension plate far away from the connecting plate.

According to an embodiment of the present application, the comb part includes a plurality of comb teeth arranged along a length direction of the extension plate, each of the comb teeth being horizontally arranged.

According to one embodiment of the application, the tips of the teeth are provided with a first face and a second face, the first face being located above the second face, the first face being arranged obliquely.

According to one embodiment of the application, the first face is tangential to the surface of the rear drum.

According to one embodiment of the application, the rear wiper strip further comprises:

And the sealing piece is arranged on the connecting plate and is positioned above the extension plate, and the top of the sealing piece is positioned between the rear dirt sucking port and the rear roller in the horizontal direction.

According to one embodiment of the application, the side of the top surface of the sealing element, which is close to the rear dirt suction opening, is not higher than the bottom of the rear dirt suction opening, and the side of the top surface of the sealing element, which is close to the rear rolling brush, is higher than the side of the sealing element, which is close to the rear dirt suction opening.

According to one embodiment of the application, the cleaning assembly further comprises:

The front roller is arranged on the cleaning main body and is suitable for guiding garbage to enter the front dirt suction port;

The water spraying assembly is arranged on the cleaning main body and is suitable for spraying cleaning liquid to the front roller and/or the rear roller;

the front wiper blade is arranged on the cleaning main body and is positioned above the front dirt suction port, and the front wiper blade is propped against the front roller;

The rear wiper blade is arranged on the cleaning main body and positioned above the rear dirt suction port, and the rear wiper blade abuts against the rear roller.

According to one embodiment of the application, the ratio between the cross-sectional area of the rear soil pick-up port and the cross-sectional area of the front soil pick-up port is between 1:5 and 1:2.

According to one embodiment of the application, the ratio between the cross-sectional area of the rear soil pick-up port and the cross-sectional area of the front soil pick-up port is 1:4. In a second aspect, the application provides a cleaning system comprising a cleaning assembly according to the foregoing.

According to the cleaning system disclosed by the application, the rear scraping strip with the comb tooth parts is arranged at the smaller rear dirt sucking opening of the cleaning assembly, and the comb tooth parts are propped against the rear roller, so that larger garbage on the rear roller can be scraped off, and the larger garbage is prevented from blocking the rear dirt sucking opening.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a bottom view of a cleaning assembly provided in an embodiment of the present application;

FIG. 2 is a side cross-sectional view of a cleaning assembly provided in an embodiment of the present application;

FIG. 3 is a schematic view of a rear wiper strip according to an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 2;

Fig. 5 is an enlarged view of a portion B in fig. 3.

Reference numerals:

The cleaning main body 100, the front soil pick-up port 110, the rear soil pick-up port 120, the base plate 130, the rear drum 200, the rear wiper blade 300, the comb teeth portion 310, the comb teeth 311, the first face 312, the second face 312, the connection plate 320, the extension plate 330, the through hole 340, the sealing member 350, the front drum 400, the water spray assembly 500, the front wiper blade 600, the rear wiper blade 700, and the front wiper blade 800.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

A cleaning assembly provided in accordance with an embodiment of the present application is described with reference to fig. 1-4.

The cleaning assembly includes a cleaning main body 100, a rear drum 200, and a rear scraper 300, the cleaning main body 100 being provided with a front soil pick-up port 110 and a rear soil pick-up port 120, the cross-sectional area of the front soil pick-up port 110 being greater than the cross-sectional area of the rear soil pick-up port 120; the rear drum 200 is provided to the cleaning main body 100, and the rear drum 200 is adapted to guide the garbage into the rear suction port 120; the rear scraper 300 is disposed on the cleaning main body 100, and the rear scraper 300 includes a comb portion 310, where the comb portion 310 abuts against the rear drum 200 and is located below the rear dirt suction opening 120.

It should be noted that the cleaning component may be a floor brush or a sweeping robot, and the cleaning component is used for cleaning the garbage on the surface to be cleaned, where the surface to be cleaned may be a floor or a furniture surface. Of course, the cleaning assembly may be any other device having a cleaning function, and the present embodiment is not limited thereto.

In order to more clearly illustrate the structure and principle of the cleaning assembly provided by the embodiment of the application, the cleaning assembly is taken as a floor brush for illustration.

The floor brush further comprises a front roller 400, the front roller 400 being provided to the cleaning body 100, the front roller 400 being adapted to guide the waste into the front dirt suction opening 110. The front suction port 110 and the rear suction port 120 communicate with a suction channel (not shown).

In some embodiments, the floor brush is also connected with a host machine in use, the host machine is provided with an air duct, a suction component and a separation component are arranged in the air duct, the suction component is arranged in the air duct, and the air duct is communicated with the sewage suction channel. When the suction assembly is started, suction is formed in the air duct and the dirt suction channel, and air is sucked from the front dirt suction port 110 and the rear dirt suction port 120; meanwhile, the front drum 400 rotates in a counterclockwise direction, the rear drum 200 rotates in a clockwise direction, the front drum 400 and the rear drum 200 roll up the garbage on the surface to be cleaned, and the garbage is sucked into the soil suction channel together with the air when the garbage rotates to the front soil suction port 110 and the rear soil suction port 120. The separation assembly separates the waste from air, which is exhausted through the suction assembly, and the waste enters the collection assembly.

It will be appreciated that the front suction inlet 110 and the rear suction inlet 120 may suck in waste at the same time, the front suction inlet 110 being the main suction inlet for sucking in most of the waste on the surface to be cleaned, the rear suction inlet 120 being used for sucking in waste which the front suction inlet 110 does not have access to suck in. Accordingly, the rear soil pick-up port 120 has a relatively weak soil pick-up capacity compared to the front soil pick-up port 110, and the rear soil pick-up port 120 has a smaller cross-sectional area than the front soil pick-up port 110. However, the front suction inlet 110 may leak out larger waste, and the rear suction inlet 120 may be blocked due to the smaller size by sucking larger waste.

In some embodiments, the ratio between the cross-sectional area of the rear soil pick-up port 120 and the cross-sectional area of the front soil pick-up port 110 is between 1:5 and 1:2.

It should be noted that the cross-sectional area of the rear dirt suction opening 120 should not be too small, otherwise, even smaller garbage may not be sucked; meanwhile, the cross-sectional area of the rear soil sucking port 120 is not excessively large, because the rear soil sucking port 120 having too large size does not have a problem of being incapable of sucking large garbage, and the rear scraper 300 provided by the present application is not required.

Therefore, the ratio between the cross-sectional area of the rear soil pick-up port 120 and the cross-sectional area of the front soil pick-up port 110 is greater than or equal to 1:5, so that the rear soil pick-up port 120 can suck smaller garbage; and the ratio between the cross-sectional area of the rear dirt suction port 120 and the cross-sectional area of the front dirt suction port 110 is less than or equal to 1:2, so that the rear dirt suction port 120 cannot suck the enlarged garbage, and the rear scraping strip 300 provided by the application can play an auxiliary role.

In some embodiments, the ratio between the cross-sectional area of the rear soil pick-up port 120 and the cross-sectional area of the front soil pick-up port 110 is 1:4.

It should be noted that, the ratio between the cross-sectional area of the rear soil pick-up port 120 and the cross-sectional area of the front soil pick-up port 110 affects the distribution ratio of the air volumes in the soil pick-up channels of the rear soil pick-up port 120 and the front soil pick-up port 110, thereby affecting the suction force of the rear soil pick-up port 120. Under the condition that a certain negative pressure is formed in the dirt sucking channel, the rear dirt sucking port 120 can have larger suction force under the condition that the ratio is 1:4, and better effect of sucking dirt on the ground can be achieved under the rotating fit of the rear roller 200.

In some embodiments, the surface of the rear drum 200 is provided with bristles, and the abutment of the comb part 310 against the rear drum 200 may mean that the comb teeth 311 of the comb part 310 are partially inserted into the bristles.

In other embodiments, the surface of the rear drum 200 is planar, and the abutment of the comb teeth 310 with the rear drum 200 may mean that the comb teeth 311 of the comb teeth 310 are interference fit with the surface of the rear drum 200.

It can be appreciated that, since the comb teeth 310 are abutted against the rear drum 200, when the rear drum 200 rolls up the garbage, if the volume of the garbage is smaller than the gap between the comb teeth 311 of the comb teeth 310, the garbage can be sucked into the rear soil suction port 120 through the comb teeth 310; if the volume of the garbage is greater than the gaps between the comb teeth 311 of the comb teeth 310, the garbage cannot pass through the comb teeth 310, and thus is scraped off the rear drum 200. The scraped garbage falls again on the surface to be cleaned, and is rolled up by the front drum 400 along with the reciprocating motion of the floor brush, thereby being sucked in by the front soil suction port 110.

According to the cleaning assembly of the application, the rear scraping strip 300 with the comb teeth 310 is arranged at the smaller rear dirt sucking opening 120, and the comb teeth 310 are propped against the rear roller 200, so that larger garbage on the rear roller 200 can be scraped off, and the larger garbage is prevented from blocking the rear dirt sucking opening 120.

In some embodiments, the rear wiper strip 300 includes a connection plate 320 and an extension plate 330, the connection plate 320 being connected with the bottom plate 130 of the cleaning main body 100; the extension plate 330 is connected with the connection plate 320, and one side of the extension plate 330 close to the connection plate 320 is higher than one side far away from the connection plate 320; the comb teeth 310 are provided on a side of the extension plate 330 remote from the connection plate 320.

It should be noted that the bottom plate 130 of the cleaning main body 100 may be reused as the lower pipe wall of the dirt suction channel, and may be detachable. Thus, the dirt pickup channel can be cleaned by removing the bottom 130.

In some embodiments, the base plate 130 and the connection plate 320 are provided with through holes 340 at opposite positions. The through holes 340 are used to provide bolts to fix the base plate 130 and the connection plate 320. Likewise, the bolts may be unscrewed and the connection plate 320 may be detached from the bottom plate 130.

In some embodiments, extension plate 330 and connection plate 320 may be integrally connected, or extension plate 330 and connection plate 320 may be detachably connected.

In the present embodiment, the extension plate 330 is disposed obliquely from left to right from top to bottom. This reduces the height of the comb teeth 310 at the position against the rear drum 200, and can scrape larger garbage from the rear drum 200 more quickly. Meanwhile, more space can be reserved above the device.

In some embodiments, the comb part 310 includes a plurality of comb teeth 311 arranged along a length direction of the extension plate 330, each comb tooth 311 being horizontally arranged.

The side of the extension plate 330 remote from the connection plate 320 may be parallel to the axial direction of the rear drum 200 and have a length greater than or equal to the axial length of the rear drum 200. Therefore, by arranging enough comb teeth 311, all positions of the rear roller 200 in the axial direction are propped against the comb teeth 311, and the blocking effect on larger garbage is improved.

In the present embodiment, the comb teeth 311 are abutted against the lower portion of the rear drum 200, and when the comb teeth 311 are horizontally arranged, an angle formed by the comb teeth 311 and the surface of the rear drum 200 toward the lower direction is an obtuse angle. Thus, even when the large garbage is scraped off, the garbage is not easily clamped at the abutting position.

In some embodiments, the tips of the comb teeth 311 are provided with a first face 312 and a second face 313, the first face 312 being located above the second face 313, the first face 312 being arranged obliquely.

In the present embodiment, the bottom end of the first face 312 is located on the right side of the top end of the first face 312, and the first face 312 is arranged obliquely from left to right from top to bottom. Therefore, the occupation of the upper space by the comb teeth 311 is reduced, and the comb teeth 311 are matched with the rear roller 200 more tightly by being matched with the arc surface of the lower side of the rear roller 200. If the rear drum 200 is provided with bristles, the comb teeth 311 may be inserted into the bristles more.

In some embodiments, the second face 313 may be disposed vertically or may be disposed obliquely.

In some embodiments, the first face 312 is tangential to the surface of the rear drum 200. Whereby the comb teeth 311 can be further more closely fitted with the rear drum 200.

In some embodiments, the rear wiper strip 300 further includes a seal 350, the seal 350 being disposed on the connection plate 320 and above the extension plate 330, and a top of the seal 350 being located between the rear soil suction port 120 and the rear drum 200 in a horizontal direction.

In some embodiments, the material of the seal 350 may be PVC (Polyvinyl chloride ) soft gel. Of course, other materials may be used, and this embodiment is not limited thereto.

It is understood that the sealing member 350 may seal the gap between the rear soil pick-up port 120 and the rear drum 200, thereby improving the air tightness of the rear soil pick-up port 120 and the soil pick-up capacity of the soil pick-up port 120.

In some embodiments, the top surface 351 of the seal 350 is not higher on the side near the rear soil pick-up port 120 than the bottom of the rear soil pick-up port 120, and the top surface 351 of the seal 350 is higher on the side near the rear roller brush 200 than on the side near the rear soil pick-up port 120.

In some embodiments, the side of the top surface 351 of the seal 350 adjacent to the rear soil pick-up port 120 may be flush with the bottom of the rear soil pick-up port 120, thereby improving the air tightness without shrinking the rear soil pick-up port 120.

It will be appreciated that tilting the top surface 351 of the seal 350 adjacent to the side of the rear roller brush 200 may act to collect waste and prevent it from falling off the top surface 351 of the seal 350 to the ground.

In some embodiments, a side of the top surface 351 of the sealing member 350 near the rear roll brush 200 may be abutted against the surface of the rear roll brush 200, thereby improving air tightness.

In some embodiments, the cleaning assembly further includes a water spray assembly 500, a front wiper blade 600, and a rear wiper blade 700, the water spray assembly 500 being provided to the cleaning main body 100, the water spray assembly 500 being adapted to spray the cleaning liquid toward the front drum 400 and/or the rear drum 200; the front wiper blade 600 is disposed on the cleaning main body 100 and above the front dirt suction opening 110, and the front wiper blade 600 abuts against the front drum 400; the rear wiper blade 700 is disposed on the cleaning main body 100 and above the rear dirt suction opening 120, and the rear wiper blade 700 abuts against the rear drum 200.

In this embodiment, the cleaning liquid may be clear water or a mixture of clear water and a cleaning agent, wherein the cleaning agent may be a solvent having a cleaning function such as a disinfectant or soapy water. The water spray assembly 500 sprays the cleaning liquid to the front drum 400 and the rear drum 200, so that the front drum 400 and the rear drum 200 can clean the surface to be cleaned, and the cleaning effect is improved.

It will be appreciated that the front wiper blade 600 may be abutted against the front drum 400 to wipe dirt from the front drum 400, and the rear wiper blade 700 may be abutted against the rear drum 200 to wipe dirt from the rear drum 200. The front and rear drums 400 and 200 are to be cleaned with the cleaning solution, and then, the cleaning solution is applied to the surface to be cleaned, and then, the cleaning solution is scraped off by the front and rear wiper plates 600 and 700 to prevent the surface to be cleaned from being polluted.

In some embodiments, the water spray openings of the water spray assembly 500 are positioned at the rear side of the front wiper blade 600 and the rear side of the rear wiper blade 700 in the rotation direction of the front drum 400 and the rear drum 200, respectively, and the cleaning solution is sprayed cleanly after the dirty water on the front drum 400 and the rear drum 200 is scraped off by the front wiper blade 600 and the rear wiper blade 700.

In some embodiments, the cleaning assembly further includes a front scraper bar 800, the front scraper bar 800 being disposed on the cleaning main body 100 below the front soil pick-up port 110, an end of the front scraper bar 800 extending downward, and an end of the front scraper bar 800 being lower than the front drum 400.

It will be appreciated that the front wiper strip 800 may provide some barrier to rearward travel of the waste. As the cleaning assembly advances, the front wiper strip 800 blocks the debris near the front roller 400 so that the front roller 400 rolls up the debris and the debris is more easily sucked into the dirt pickup channel.

An embodiment of the application provides a cleaning system comprising a cleaning assembly according to the foregoing. The specific structure and principle of the cleaning assembly can be referred to the foregoing embodiments, and this embodiment will not be described herein.

In some embodiments, the cleaning system may be a scrubber, the cleaning assembly may be a floor brush, and the scrubber may further include a base station, a host. When the multifunctional floor brush is used, the host machine is connected with the floor brush, and a user holds the host machine to push the floor brush to move on the floor or the surface of furniture waiting for the cleaning surface; after use, the host and the ground brush can be integrally placed at the base station, or the host and the ground brush can be separated and placed at the base station.

In other embodiments, the cleaning system may be an automated cleaning system, the cleaning assembly may be a sweeping robot, and the automated cleaning system may further include a base station. The sweeping robot automatically moves on the ground when cleaning; and when the cleaning is finished or the return condition is met, the sweeping robot returns to the base station.

According to the cleaning system of the application, the rear scraping strip 300 with the comb teeth 310 is arranged on the smaller rear dirt suction opening 120 of the cleaning assembly, and the comb teeth 310 are propped against the rear roller 200, so that larger garbage on the rear roller 200 can be scraped off, and the larger garbage is prevented from blocking the rear dirt suction opening 120. Of course, the cleaning system may also adopt the technical solutions of the above embodiments, which also have corresponding technical effects.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A cleaning assembly, comprising:

The cleaning main body is provided with a front dirt sucking port and a rear dirt sucking port, and the cross section area of the front dirt sucking port is larger than that of the rear dirt sucking port;

a rear roller arranged on the cleaning main body, wherein the rear roller is suitable for guiding garbage into the rear dirt suction port;

The rear scraping strip is arranged on the cleaning main body and comprises comb tooth parts, the comb tooth parts are propped against the rear roller, and propped parts are positioned below the rear dirt suction opening.

2. The cleaning assembly of claim 1, wherein the rear wiper strip comprises:

The connecting plate is connected with the bottom plate of the cleaning main body;

The extending plate is connected with the connecting plate, and one side of the extending plate, which is close to the connecting plate, is higher than one side of the extending plate, which is far away from the connecting plate;

the comb tooth parts are arranged on one side of the extension plate away from the connecting plate.

3. The cleaning assembly of claim 2, wherein the comb portion includes a plurality of comb teeth disposed along a length of the extension plate, each of the comb teeth being disposed horizontally.

4. A cleaning assembly according to claim 3, wherein the tips of the teeth are provided with a first face and a second face, the first face being located above the second face, the first face being arranged obliquely.

5. The cleaning assembly of claim 4, wherein the first face is tangential to a surface of the rear drum.

6. The cleaning assembly of claim 2, wherein the rear wiper strip further comprises:

And the sealing piece is arranged on the connecting plate and is positioned above the extending plate, and the top of the sealing piece is positioned between the rear dirt sucking opening and the rear roller in the horizontal direction.

7. The cleaning assembly of claim 6, wherein a side of the top surface of the seal adjacent the rear soil pick-up port is no higher than a bottom of the rear soil pick-up port, and wherein a side of the top surface of the seal adjacent the rear drum is higher than a side adjacent the rear soil pick-up port.

8. The cleaning assembly of any one of claims 1-7, further comprising:

the front roller is arranged on the cleaning main body and is suitable for guiding garbage to enter the front dirt suction port;

The water spraying assembly is arranged on the cleaning main body and is suitable for spraying cleaning liquid to the front roller and/or the rear roller;

The front wiper blade is arranged on the cleaning main body and is positioned above the front dirt suction port, and the front wiper blade abuts against the front roller;

And the rear wiper blade is arranged on the cleaning main body and is positioned above the rear dirt suction port, and the rear wiper blade abuts against the rear roller.

9. The cleaning assembly of any one of claims 1-7, wherein a ratio between a cross-sectional area of the rear soil pick-up port and a cross-sectional area of the front soil pick-up port is between 1:5 and 1:2.

10. The cleaning assembly of claim 9, wherein a ratio between a cross-sectional area of the rear soil pick-up port and a cross-sectional area of the front soil pick-up port is 1:4.

11. A cleaning system comprising a cleaning assembly according to any one of claims 1-10.