CN112587038A

CN112587038A - Dust absorption subassembly, dust collecting system and robot of sweeping floor

Info

Publication number: CN112587038A
Application number: CN202011554547.8A
Authority: CN
Inventors: 黄忠平; 林海利; 黄现安; 唐兴潮; 李健; 武朝阳
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-04-02

Abstract

The application relates to a dust collection assembly, a dust collection system and a sweeping robot, wherein the dust collection assembly comprises a floating shell, a rolling brush cavity and a dust outlet are arranged on the floating shell; the floating connecting piece comprises a transition channel, a first connecting port and a second connecting port, wherein the first connecting port and the second connecting port are arranged at two ends of the transition channel; wherein the first connector has a dimension L along the longitudinal direction₁The first connecting port has a dimension W in the width direction₁The second connecting port has a dimension L along the longitudinal direction₂The second connection port has a dimension W in the width direction₂The size of the rolling brush cavity along the longitudinal direction is L, and the conditions are met: l is₂＜L₁、0.8≤W₁/W₂Less than or equal to 1.2, and less than 0.2L₂Less than or equal to 0.5L. The application provides a dust absorption subassembly, dust collecting system and robot of sweeping floor, dust absorption subassembly's structural design is more reasonable, and the dust is in second connector gap department, and the negative pressure increases, and the air current is high-speedThe dust is easily absorbed into the dust collecting box at the rear part from the rolling brush cavity, thereby improving the dust collection efficiency.

Description

Dust absorption subassembly, dust collecting system and robot of sweeping floor

Technical Field

The application relates to the technical field of cleaning equipment, in particular to a dust collection assembly, a dust collection system and a sweeping robot.

Background

A floor sweeping robot is one of intelligent household appliances, and can automatically finish floor cleaning work in a room by means of certain artificial intelligence.

The sweeping robot collects dust on the ground through a dust collection system, generally, the dust collection system comprises a rolling brush mechanism, a floating connecting piece and a dust collection box, the rolling brush mechanism comprises a floating shell and a rolling brush assembly, the rolling brush assembly is arranged in a rolling brush cavity of the floating shell, the rolling brush cavity is communicated with the dust collection box through the floating connecting piece, the rolling brush assembly can drive the dust when rotating, and the dust is collected from the rolling brush cavity and the floating connecting piece to the dust collection box at the rear side under the action of adsorption force.

However, the conventional dust suction system has a problem of low dust suction efficiency due to the structural design.

Disclosure of Invention

Accordingly, it is necessary to provide a dust collection assembly, a dust collection system and a sweeping robot with high dust collection efficiency to solve the problem of low dust collection efficiency of the conventional dust collection system.

The application provides a dust absorption subassembly for with dust drainage to dust collection box, the dust absorption subassembly includes:

the floating shell is provided with a rolling brush cavity for mounting the rolling brush assembly, and the floating shell is provided with a dust outlet communicated with the rolling brush cavity;

the floating connecting piece comprises a transition channel, a first connecting port and a second connecting port, wherein the first connecting port and the second connecting port are communicated with two opposite ends of the transition channel;

wherein the first connector has a dimension L along its longitudinal direction₁The first connectionThe dimension of the mouth in the width direction thereof is W₁The second connecting port has a dimension L along the longitudinal direction₂The second connecting port has a dimension W in the width direction thereof₂The size of the rolling brush cavity along the lengthwise direction is L;

said L₁And L₂The conditions are satisfied: l is₂＜L₁And 0.2L < L₂≤0.5L；

The W is₁And W₂The conditions are satisfied: w is more than or equal to 0.8₁/W₂≤1.2。

In one embodiment, the cross-sectional area of the first connection port is larger than the cross-sectional area of the second connection port.

In one embodiment, the transition passage increases in radial dimension from the first connection port to the second connection port.

In one embodiment, the first connector has a first end and a second end along the longitudinal direction thereof, the second connector has a third end and a fourth end along the longitudinal direction thereof, the first end and the third end are connected to form a first connecting line, the second end and the fourth end are connected to form a second connecting line, and the first connecting line and the second connecting line are respectively located on two sides of a connecting line between the center of the first connector and the center of the second connector;

wherein the included angle between the first connecting line and the second connecting line ranges from 120 degrees to 170 degrees.

In one embodiment, an included angle between the first connecting line and the second connecting line ranges from 150 degrees to 165 degrees.

In one embodiment, the floating connection piece comprises two first side walls oppositely arranged along a first direction and two second side walls oppositely arranged along a second direction, each first side wall is located between and connected with the two second side walls, and the two first side walls and the two second side walls enclose the transition channel;

wherein the first sidewall is in smooth transition connection with the second sidewall, and the first direction is perpendicular to the second direction.

In one embodiment, the floating connector is injection molded to the floating housing.

In one embodiment, the longitudinal direction of the first connecting port is parallel to the longitudinal direction of the second connecting port.

In one embodiment, the dust inlet has a first centerline and the dust outlet has a second centerline;

the first centerline and the second centerline are coplanar and intersect each other.

In one embodiment, the included angle between the first center line and the second center line is greater than 90 degrees and less than 180 degrees.

In one embodiment, the dust outlet is arranged symmetrically relative to the central plane of the rolling brush cavity.

In another aspect of the present application, a dust collecting system is further provided, which includes a dust collecting box and the dust collecting assembly.

In another aspect of the application, a sweeping robot is also provided, which includes the above dust collecting system.

According to the dust collection assembly, the dust collection system and the sweeping robot, in the process that dust flows from the rolling brush cavity to the dust collection box through the dust outlet, the first connecting port, the transition channel and the second connecting port, the rolling brush cavity is large in volume, negative pressure loss is large, air speed is not high, and the dust is not easy to adsorb to the rear dust collection box.

However, the relation between the rolling brush cavity at the front end of the airflow and the second connecting port at the rear end of the airflow is more than or equal to 0.2L₂Less than or equal to 0.5L, and the relation between the first connector and the second connector satisfies L₂＜L₁、0.8≤W₁/W₂Less than or equal to 1.2, so know, the relative first connector of second connector is big in the dimensional change of lengthwise direction, and dimensional change in the width direction is little for the dust is in second connector department, and the negative pressure increases, and the air current moves at a high speed, and the dust is adsorbed to the dust collecting box in rear in following the round brush chamber comparatively easily, and then has improved dust absorption efficiency.

In addition, the size of the first connecting port along the lengthwise direction is increased rather than the width direction by the limitation of the shape of the rolling brush cavity and the overall appearance of the sweeping robot, so that the structural design of the dust collection assembly is more reasonable.

Drawings

FIG. 1 is a perspective view of a vacuum assembly according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the vacuum assembly in an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of the cleaning assembly shown in FIG. 1;

FIG. 4 is a schematic view of the cleaning assembly shown in FIG. 1 from another perspective;

figure 5 is a schematic view of the cleaning assembly shown in figure 1 from a further perspective.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present application, it is to 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," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

FIG. 1 illustrates a perspective view of a vacuum assembly in an embodiment of the present application; FIG. 2 is an exploded view of the vacuum assembly in an embodiment of the present disclosure; figure 3 shows a cross-sectional schematic view of the cleaning assembly shown in figure 1. For the purpose of illustration, the drawings show only the structures associated with the embodiments of the application.

Referring to the drawings, an embodiment of the present application provides a dust suction assembly 100 for guiding dust to a dust box, and the dust suction assembly 100 includes a floating housing 10 and a floating connector 20.

The floating housing 10 is provided with a roller brush chamber 11 for mounting a roller brush assembly. In the embodiment of the application, the robot of sweeping the floor includes the round brush mechanism, and the round brush mechanism includes unsteady casing 10, specifically, the robot of sweeping the floor still includes the casing, and the casing includes fixed casing, and fixed casing has the chamber that floats, and unsteady connecting piece 20 one end links to each other with fixed casing, and other end round brush mechanism links to each other, and the outside of round brush mechanism still is equipped with the rocking arm, meets the barrier when round brush mechanism, drives round brush mechanism through the rocking arm and compresses unsteady connecting piece 20 and float in unsteady intracavity in order to keep away the barrier. Specifically, the floating connector 20 is a soft floating connector.

The floating shell 10 is provided with a dust outlet 12 communicated with the rolling brush cavity 11, the floating connecting piece 20 comprises a transition channel 21, and a first connecting port 22 and a second connecting port 23 which are communicated with two opposite ends of the transition channel 21, the first connecting port 22 is used for being connected with the dust outlet 12, and the second connecting port 23 is used for being connected with a dust collecting box.

Specifically, the floating housing 10 is further provided with a dust inlet 13 (shown in fig. 4) communicated with the rolling brush cavity 11, and dust enters the rolling brush cavity 11 through the dust inlet 13, is discharged into the transition channel 21 from the dust outlet 12 under the negative pressure of the fan structure behind the dust collection box, and finally enters the dust collection box for collection.

Wherein the first connector 22 has a dimension L along the longitudinal direction thereof₁The dimension of the first connector 22 in the width direction thereof is W₁The second connection port 23 has a dimension L in the longitudinal direction thereof₂The second connection port 23 has a dimension W in the width direction thereof₂The dimension of the rolling brush cavity 11 along the longitudinal direction is L, L₁And L₂The conditions are satisfied: l is₂＜L₁And 0.2L is less than or equal to L₂≤0.5L，W₁And W₂The conditions are satisfied: w is more than or equal to 0.8₁/W₂≤1.2。

In the process that dust flows from the rolling brush cavity 11 to the dust collecting box through the dust outlet 12, the first connecting port 22, the transition channel 21 and the second connecting port 23, the rolling brush cavity 11 has large volume, large negative pressure loss and low air flow speed, so that the dust is not easy to be adsorbed into the rear dust collecting box.

However, the relation between the rolling brush cavity 11 at the front end of the airflow and the second connecting port 23 at the rear end of the airflow is more than or equal to 0.2L₂Less than or equal to 0.5L, and the relation between the first connecting port 22 and the second connecting port 23 satisfies L₂＜L₁、0.8≤W₁/W₂Less than or equal to 1.2, therefore, the second connecting port 23 has a large size change in the longitudinal direction and a small size change in the width direction relative to the first connecting port 22, so that the negative pressure of the dust at the second connecting port 23 is increased, the airflow moves at a high speed, and the dust is easily adsorbed into the dust collecting box at the rear from the rolling brush cavity 11, thereby improving the dust collection efficiency.

In addition, limited by the shape of the rolling brush cavity 11 and the overall shape of the sweeping robot, the size of the first connector 22 along the longitudinal direction is increased, but not along the width direction, so that the structural design of the dust collection assembly 100 is more reasonable.

In order to verify the dust collection efficiency of the dust collection assembly 100 of the prior art and the present application, the inventor purposefully made verification tests:

the test mode is as follows: the test is carried out by adopting a linear dust removal mode, wherein a certain amount of dust is scattered in a specific area, the specific area can be rectangular, and the dust removal rate is determined by determining the dust absorption amount after the piece to be tested linearly passes through the specific area.

It should be noted that, when the dust collection assembly 100 of the present application is tested, negative pressure needs to be provided for the dust collection assembly 100 to collect dust, and dust needs to be collected and weighed, so a dust collection structure and a negative pressure structure should be connected to the rear of the dust collection assembly 100.

The test results are shown in table 1:

TABLE 1

It is noted that two sets of data were tested for each of the examples and comparative examples described above for reference.

It is also to be noted that L in each of the above examples and comparative examples₁、W₁And W₂Are all the same, and for L₁Satisfy L/3 < L₁Not more than L, and L₂＜L₁E.g. L₁＝L，W₁And W₂To satisfy W of 0.8. ltoreq₁/W₂A fixed value of any of ≦ 1.2, e.g., W₁/W₂＝1。

From the above test results, it can be seen that when 0.2L < L₂Less than or equal to 0.5L, dust removal rate up to 62.57% or more, and up to 68.29%, when L is less than or equal to 0.5L₂When the dust removal rate is 0.2L, the dust removal rate is reduced along with L₂< 0.2L, i.e. L₂The value continues to decrease and the dust removal rate continues to decrease, likewise when L₂When the dust removal rate is more than 0.5L, the dust removal rate is also obviously reduced. Therefore, the above test shows that when the condition 0.2L < L is satisfied₂When the volume is less than or equal to 0.5LThe dust removal rate is obviously improved, and the dust collection efficiency is improved.

In some embodiments, L₁The conditions are satisfied: l is more than or equal to 0.5L₁Less than or equal to L. If L is₁If the size is too small, i.e. the first connection port 22 only covers a part of the area of the rolling brush cavity 11, and the area of the rolling brush cavity 11 not covered by the first connection port 22 is blocked, dust will not be easily adsorbed to the first connection port 22, so that dust is collected and the dust removing effect is reduced. Therefore, set 0.5L ≦ L₁L is less than or equal to L, the area of the first connecting port 22 which does not cover the rolling brush cavity 11 can be reduced, dust accumulation is reduced, and the dust removal effect is improved. Further, L is more than or equal to 0.9L₁L.ltoreq.L, preferably L₁0.95L. Since the first connecting port 22 of the floating connecting piece 20 is connected with the dust outlet 12, L is more than or equal to 0.9L₁L or less, a certain space may be reserved on the floating housing 10 to stably connect the floating connector 20 to the floating housing 10 while minimizing dust accumulation.

In some embodiments, the cross-sectional area of the first connector 22 is greater than the cross-sectional area of the second connector 23. Therefore, compared with the first connecting port 22, the negative pressure of the second connecting port 23 is higher, the air speed is faster, the dust collection effect is good, and the dust collection efficiency is high.

Referring again to fig. 3, in some embodiments, the radial dimension of the transition passage 21 gradually increases from the first connection port 22 to the second connection port 23. Therefore, in the process of going from the first connector 22 to the second connector 23, the negative pressure is gradually increased, the air speed is gradually increased, the dust collection process is stable, and the dust collection efficiency is high.

Further, the first connection port 22 has a first end and a second end along the longitudinal direction thereof, the second connection port 23 has a third end and a fourth end along the longitudinal direction thereof, the first end and the second end are connected to form a first connection line, the second end and the fourth end are connected to form a second connection line, the first connection line and the second connection line are respectively located at two sides of a connection line between the center of the first connection port 22 and the center of the second connection port 23, and an included angle α range between the first connection line and the second connection line is 120-170 degrees. When the included angle α between the first connection line and the second connection line is 120-170 degrees, the transition channel 21 has a certain inclination in the direction from the first connection port 22 to the second connection port 23, and the distance from the first connection port 22 to the second connection port 23 is reduced, so that dust can be smoothly and rapidly adsorbed into a rear dust collecting box through the transition channel 21 after entering the first connection port 22, the adsorption resistance is reduced, and the dust collection efficiency is improved. Preferably, the included angle α between the first line and the second line ranges from 150 degrees to 165 degrees. In this range, it is possible to prevent the inner wall of the transition passage 21 from becoming a blocking surface for blocking dust from the first connection port 22 to the second connection port 23 due to an excessively large included angle α between the first connection line and the second connection line, and it is also possible to prevent the distance from the first connection port 22 to the second connection port 23 from being lengthened and the dust collection efficiency from being low due to an excessively small included angle α between the first connection line and the second connection line.

As shown in fig. 5, in some embodiments, the floating connector 20 includes two first sidewalls 24 oppositely disposed along a first direction and two second sidewalls 25 oppositely disposed along a second direction, each first sidewall 24 is located between the two second sidewalls 25 and connected to the two second sidewalls 25, the two first sidewalls 24 and the two second sidewalls 25 enclose a transition channel 21, wherein the first sidewalls 24 and the second sidewalls 25 are smoothly transitionally connected, and the first direction is perpendicular to the second direction. Specifically, the first direction is a transverse direction of the first connector 22, and the second direction is a longitudinal direction of the first connector 22. Thus, the resistance of the dust contacting the inner wall of the transition passage 21 can be further reduced, and the dust can be further smoothly adsorbed to the rear dust collecting box. Specifically, the first side wall 24 and the second side wall 25 are in arc transition connection.

In some embodiments, floating coupling 20 is injection molded to floating housing 10. The injection molding of the floating connector 20 and the floating shell 10 can simplify the structure of the joint of the floating connector 20 and the floating shell 10, so that the connection between the floating connector 20 and the floating shell 10 is smoother, the kinetic energy loss of dust at the joint is reduced, and the dust can enter the transition channel 21.

Referring to fig. 3 again, in some embodiments, the longitudinal direction of the first connection port 22 is parallel to the longitudinal direction of the second connection port 23. Specifically, the longitudinal direction of the first connection port 22 and the longitudinal direction of the second connection port 23 are both parallel to the longitudinal direction of the roll brush chamber 11. Therefore, the turning area of the transition passage 21 can be avoided, the airflow path of the transition passage 21 is smoother, and the resistance of dust in the transition passage 21 is reduced.

Referring again to fig. 2, in some embodiments, the dust inlet 13 has a first centerline, and the dust outlet 12 has a second centerline, and the first centerline and the second centerline are coplanar and intersect with each other. Therefore, the dust can enter the rolling brush cavity 11 from the dust inlet 13, and then the dust can be discharged from the dust outlet 12, so that the dust suction path is shortest, and the dust suction effect is improved. Further, the included angle between the first center line and the second center is greater than 90 degrees and less than 180 degrees. On one hand, the height size of the whole machine in the vertical direction can be reduced, and on the other hand, the dust outlet 12 is arranged closer to the dust inlet 13, so that dust can rapidly enter the first connecting port 22 through the dust outlet 12 after entering the roller brush cavity 11, and the dust removal efficiency is improved.

In some embodiments, the dust outlet 12 is disposed facing the center of the roller brush chamber 11. Therefore, the dust entering the rolling brush cavity 11 can be uniformly adsorbed to the dust outlet 12 and then passes through the filtering channel 21 to the rear dust collecting box, and the uneven adsorption of the dust is avoided.

Based on the same inventive concept, the present application further provides a dust collecting system, which comprises the dust collecting box and the dust collecting assembly 100. Specifically, the dust box has a dust box inlet, which is connected to the second connection port 23.

The dust collection system further comprises a front air duct structure, a fan structure and a rear air duct structure which are sequentially connected, and the dust collection box is connected with the front air duct structure.

Based on the same inventive concept, the application also provides a sweeping robot, which comprises the dust collection system.

The dust collection assembly 100, the dust collection system and the sweeping robot provided by the embodiment of the application have the following beneficial effects:

when dust flows from the roller brush cavity 11 to the dust outlet 12, the first connecting port 22, the transition channel 21 and the second connecting port 23In the process of the dust collecting box, because the volume of the rolling brush cavity 11 is larger, the negative pressure loss is larger, the air flow speed is not high, dust is not easy to be adsorbed into the dust collecting box at the rear part, but because the relation between the rolling brush cavity 11 at the front end of the air flow and the second connecting port 23 at the rear end of the air flow is more than or equal to 0.2L and less than or equal to L₂Less than or equal to 0.5L, and the relation between the first connecting port 22 and the second connecting port 23 satisfies L₂＜L₁、0.8≤W₁/W₂Less than or equal to 1.2, therefore, the second connecting port 23 has a large size change in the longitudinal direction and a small size change in the width direction relative to the first connecting port 22, so that the negative pressure of the dust at the second connecting port 23 is increased, the airflow moves at a high speed, and the dust is easily adsorbed into the dust collecting box at the rear from the rolling brush cavity 11, thereby improving the dust collection efficiency.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A suction assembly (100) for channelling dust to a dust bin, the suction assembly (100) comprising:

the floating shell (10) is provided with a rolling brush cavity (11) for mounting a rolling brush assembly, and the floating shell (10) is provided with a dust outlet (12) communicated with the rolling brush cavity (11);

the floating connecting piece (20) comprises a transition channel (21), and a first connecting port (22) and a second connecting port (23) which are communicated with the two opposite ends of the transition channel (21), wherein the first connecting port (22) is connected with the dust outlet (12), and the second connecting port (23) is connected with the dust collecting box;

wherein the first connector (22) has a dimension L along its longitudinal direction₁The dimension of the first connecting port (22) along the width direction is W₁The second connection port (23) has a dimension L in the longitudinal direction thereof₂The dimension of the second connection port (23) in the width direction thereof is W₂The size of the rolling brush cavity (11) along the lengthwise direction is L;

2. The suction assembly (100) of claim 1, wherein the first connection port (22) has a cross-sectional area greater than a cross-sectional area of the second connection port (23).

3. The suction assembly according to claim 1, characterized in that the transition channel (21) has a radial dimension that increases progressively from the first connection port (22) to the second connection port (23).

4. The suction assembly (100) of claim 3, wherein the first connector port (22) has a first end and a second end along the longitudinal direction thereof, the second connector port (23) has a third end and a fourth end along the longitudinal direction thereof, the first end and the third end are connected to form a first connection line, the second end and the fourth end are connected to form a second connection line, and the first connection line and the second connection line are respectively located on two sides of a connection line between the center of the first connector port (22) and the center of the second connector port (23);

5. The suction assembly (100) of claim 4, wherein the angle between the first line and the second line ranges from 150 degrees to 165 degrees.

6. The suction assembly (100) according to claim 1, wherein the floating connector (20) comprises two first side walls (24) oppositely arranged along a first direction and two second side walls (25) oppositely arranged along a second direction, each first side wall (24) is located between and connected with two second side walls (25), and the two first side walls (24) and the two second side walls (25) enclose the transition channel (21);

wherein the first side wall (24) and the second side wall (25) are in smooth transition connection, and the first direction is perpendicular to the second direction.

7. The suction assembly (100) of claim 1, wherein the floating connector (20) is injection molded to the floating housing (10).

8. The suction assembly (100) of claim 1, wherein a longitudinal direction of the first connection port (22) is arranged parallel to a longitudinal direction of the second connection port (23).

9. The suction assembly (100) of claim 1, wherein the dust inlet (13) has a first centerline and the dust outlet (12) has a second centerline;

10. The suction assembly (100) of claim 9, wherein the included angle between the first centerline and the second centerline is greater than 90 degrees and less than 180 degrees.

11. The suction assembly (100) according to claim 1, wherein the dust outlet (12) is arranged symmetrically with respect to a center plane of the roller brush chamber (11).

12. A dust extraction system, comprising a dust collection container and a dust extraction assembly (100) as claimed in any one of claims 1 to 11.

13. A sweeping robot comprising a suction system as claimed in claim 12.