Cleaning device

Abstract

The utility model discloses a cleaning device. The cleaning device comprises a machine body, a cleaning assembly, a suction assembly and a dust collection box. Wherein a shell is arranged at the bottom of the machine body, and the shell is provided with a containing cavity and a dust opening communicated with the containing cavity; the cleaning assembly is rotatably arranged in the accommodating cavity and is communicated with the dust opening; the suction assembly is arranged on the machine body and comprises a suction part and an air outlet part, the suction part is provided with an air inlet end and an air outlet end, and the air outlet part communicates with the air outlet end and the containing cavity so that air flowing out of the air outlet end can be conveyed into the containing cavity; the dust collection box is arranged on the machine body and communicates with the dust opening and the air inlet end. The problem that in the prior art, noise generated when a sweeping robot works is large can be solved.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and more specifically, to a cleaning device. Background Technology

[0002] Robotic vacuum cleaners, also known as automatic cleaning machines, smart vacuum cleaners, or robotic vacuum cleaners, are a type of smart home appliance that can automatically clean floors in a room using a certain level of artificial intelligence.

[0003] Robotic vacuum cleaners typically include components such as a fan and a dustbin. The fan draws in dust from the floor along with air, trapping the dust in the dustbin, while the air is expelled through the exhaust system. Currently, the exhaust system of robotic vacuum cleaners is usually located on the side of the machine. This makes it easy for noise generated by airflow vibrations to escape from the side, resulting in relatively high noise levels during operation and a poor user experience. Utility Model Content

[0004] The main objective of this application is to provide a cleaning device to solve the problem of excessive noise generated by existing robotic vacuum cleaners during operation.

[0005] According to one aspect of this application, a cleaning apparatus is provided, comprising:

[0006] The body has a housing at its bottom, and the housing has a receiving cavity and a dust port communicating with the receiving cavity;

[0007] A cleaning component, which is rotatably disposed in the receiving cavity and communicates with the dust port;

[0008] A suction assembly is disposed on the body. The suction assembly includes a suction component and an air outlet. The suction component has an air inlet and an air outlet. The air outlet is connected to the air outlet and the receiving cavity respectively to deliver the air flowing out of the air outlet to the receiving cavity.

[0009] A dust collection box is disposed on the body and is connected to the dust inlet and the air inlet respectively.

[0010] Furthermore, the air outlet includes an air outlet channel, which is connected to the air outlet end through a ventilation pipe, and the projection of the air outlet channel overlaps at least partially with the projection of the cleaning component in the projection along the thickness direction of the body.

[0011] Furthermore, the cross-section of the air outlet duct along the thickness direction of the body includes an arc-shaped surface, which is recessed in a direction away from the cleaning component.

[0012] Furthermore, the cleaning component includes a housing, the projection of which along the thickness direction of the body includes a semi-circular surface, and the air outlet duct covers the outer periphery of the housing and has a gap between it and the housing.

[0013] Furthermore, the housing has a first opening, and the air outlet channel is provided on the side of the first opening away from the cleaning component. The air outlet channel includes a first baffle and a second baffle arranged opposite to each other along a first direction. The first baffle and the second baffle are connected by an arc-shaped baffle. The cleaning component is located below the first opening and has a gap with the arc-shaped baffle.

[0014] Furthermore, the air outlet includes one or more, and when the air outlet includes multiple air outlets, the multiple air outlets are disposed on the same side of the suction member or on opposite sides of the suction member.

[0015] Furthermore, the cleaning component includes:

[0016] The outer casing is disposed within the accommodating cavity and has an installation space and a second opening, the second opening being connected to the installation space and the dust inlet, respectively.

[0017] A cleaning component having a pivot shaft rotatably disposed in the mounting space;

[0018] A drive motor is connected to the housing via a flexible connector, and the output shaft of the drive motor is aligned with the rotating shaft.

[0019] Furthermore, the drive motor includes a brushless motor.

[0020] Furthermore, a set of movable wheels is provided at the bottom of the machine body. The set of movable wheels includes a mounting frame, a movable wheel, a wheel hub, and a wheel hub motor. The mounting frame is connected to the machine body. The movable wheel is rotatably mounted on the mounting frame and protrudes from the bottom of the machine body. The wheel hub and the wheel hub motor are provided inside the movable wheel, and the output shaft of the wheel hub motor is connected to the wheel hub.

[0021] Furthermore, the hub motor includes a brushless motor.

[0022] In this application, during the operation of the cleaning device, as the cleaning components rotate, they sweep dust and debris from the surface to be cleaned into the receiving cavity. This dust and debris then enters the dust collection box through the dust inlet under the suction of the suction component. During this process, air is drawn in along with the dust, entering the suction component through the air inlet and exiting through the air outlet. If the air outlet is located on the side of the device, noise generated by air vibration can easily escape from the side, increasing the noise of the cleaning device. Therefore, this application connects the air outlet to both the air outlet and the receiving cavity. This allows the air exiting the air outlet to enter the receiving cavity at the bottom of the device via the air outlet, instead of being directly transmitted to the outside. After entering the receiving cavity, the air is dispersed within a larger space, resulting in a more uniform airflow distribution and avoiding strong air turbulence caused by concentrated airflow, further reducing noise. At the same time, when air enters the accommodating cavity, the noise generated by the vibration of the air is covered by the sound of the rotating cleaning components, thereby reducing the noise superposition effect and achieving overall noise reduction of the cleaning device. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the cleaning device disclosed in the embodiments of this application from a first-view perspective;

[0025] Figure 2 This is a schematic diagram of the cleaning device disclosed in an embodiment of this application from a second perspective.

[0026] Figure 3 The appendices disclosed in the embodiments of this application Figure 2 Enlarged view of region A in the middle;

[0027] Figure 4 This is a schematic diagram of the cleaning device disclosed in an embodiment of this application from a third-person perspective.

[0028] Figure 5 This is a partial cross-sectional view of the cleaning apparatus disclosed in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the shell structure disclosed in the embodiments of this application;

[0030] Figure 7 This is a schematic diagram of the structure of the cleaning component disclosed in the embodiments of this application;

[0031] Figure 8 This is a side view of the cleaning component disclosed in an embodiment of this application;

[0032] Figure 9 This is a bottom view of the cleaning component disclosed in an embodiment of this application;

[0033] Figure 10 This is a schematic diagram of the structure of the movable wheel assembly disclosed in the embodiments of this application;

[0034] Figure 11 This is an exploded view of the movable wheel assembly disclosed in an embodiment of this application.

[0035] The above figures include the following reference numerals:

[0036] 10. Body; 11. Housing; 111. Receptacle; 112. Dust inlet; 113. First opening; 20. Cleaning component; 21. Outer shell; 211. Installation space; 212. Second opening; 22. Cleaning component; 23. Rotating shaft; 24. Drive motor; 25. Flexible connector; 30. Suction component; 31. Suction component; 311. Air inlet; 312. Air outlet; 32. Air outlet section; 33. Air outlet channel; 331. First baffle; 332. Second baffle; 333. Arc-shaped baffle; 40. Dust collection box; 50. Ventilation duct; 60. Moving wheel set; 61. Mounting frame; 62. Moving wheel; 63. Wheel hub; 64. Wheel hub motor. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] As mentioned in the background section, existing robotic vacuum cleaners use a fan to suck in dust along with air, trapping the dust in a dustbin, while the air is expelled through an exhaust system. However, the exhaust system of current robotic vacuum cleaners is usually located on the side of the machine. This design easily allows noise generated by air vibration to escape from the side of the machine, resulting in significant noise during operation and impacting the user experience. To address this, the inventors of this application have designed a novel cleaning device that solves the problem of excessive noise generated by existing robotic vacuum cleaners. The cleaning device of this application will be described in detail below with reference to the accompanying drawings.

[0041] It should be noted that the "thickness direction of the fuselage 10" in this application refers to the attached... Figure 5 The direction indicated by the letter X in the middle, "first direction" refers to the attached... Figure 2 The direction indicated by the letter Y.

[0042] See Figures 1 to 11 As shown, according to an embodiment of this application, a cleaning device is provided, which includes a body 10, a cleaning component 20, a suction component 30, and a dust collection box 40.

[0043] The unit 10 has a housing 11 at its bottom, which has a receiving cavity 111 and a dust port 112 communicating with the receiving cavity 111. A cleaning component 20 is rotatably disposed in the receiving cavity 111 and communicates with the dust port 112. A suction component 30 is disposed on the unit 10, and includes a suction element 31 and an air outlet 32. The suction element 31 has an air inlet 311 and an air outlet 312, and the air outlet 32 ​​communicates with both the air outlet 312 and the receiving cavity 111 to deliver air flowing from the air outlet 312 into the receiving cavity 111. A dust collection box 40 is disposed on the unit 10 and communicates with both the dust port 112 and the air inlet 311. Exemplarily, the suction element 31 in this embodiment includes a negative pressure fan.

[0044] Specifically, during the cleaning process, as the cleaning component 20 rotates, it sweeps dust and debris from the surface to be cleaned into the receiving cavity 111. This dust and debris then enters the dust collection box 40 through the dust inlet 112 under the suction of the suction component 31. During this process, air is drawn in along with the dust, entering the suction component 31 through the air inlet 311 and exiting through the air outlet 312. If the air outlet is located on the side of the body 10, noise generated by air vibration can easily escape from the side of the body 10, increasing the noise level of the cleaning device. Therefore, in this embodiment, the air outlet 32 ​​is connected to both the air outlet end 312 and the receiving cavity 111. This allows the air flowing from the air outlet end 312 to enter the receiving cavity 111 at the bottom of the body 10 via the air outlet 32, instead of being directly transmitted to the outside of the body 10. After entering the receiving cavity 111, the air is dispersed within a larger space, resulting in a more uniform airflow distribution. This avoids strong air turbulence caused by concentrated airflow discharge, further reducing noise. Simultaneously, when air enters the receiving cavity 111, the noise generated by air vibration is masked by the sound of the rotating cleaning component 20, thereby reducing the noise superposition effect and achieving overall noise reduction of the cleaning device.

[0045] Further, see Figures 4 to 5 As shown, the air outlet 32 ​​in this embodiment includes an air outlet channel 33, which is connected to the air outlet end 312 via a ventilation pipe 50. Furthermore, within the projection along the thickness direction of the body 10, the projection of the air outlet channel 33 at least partially overlaps with the projection of the cleaning component 20. In this embodiment... Figure 4 The diagram shows the flow path of air as it is transmitted from the air outlet 312 into the ventilation duct 50 and then into the air outlet channel 33.

[0046] Specifically, the air outlet duct 33 overlaps with the projection of the cleaning component 20. This means that the airflow generated by the air outlet 312 can act more precisely on the cleaning component 20, thereby masking the noise generated by air vibration with the sound of the rotating cleaning component 20, reducing the noise superposition effect and achieving overall noise reduction of the cleaning device. At the same time, the overlap between the projection of the air outlet duct 33 and the cleaning component 20 helps to make the airflow act more evenly on the cleaning component 20, avoiding the airflow concentration in one part and causing excessive local pressure. This reduces the vibration of the cleaning component 20 caused by uneven airflow pressure, thereby reducing the resonance noise generated by the interaction between component vibration and airflow.

[0047] Specifically, the ventilation duct 50 in this embodiment includes a flexible hose. Since the interior of the fuselage 10 contains various electronic components, mechanical parts, etc., the space is very compact and the shape is irregular. In order to adapt to the complex structure inside the fuselage 10, this embodiment sets the ventilation duct 50 as a flexible hose, which can improve the flexibility of the layout of the ventilation duct 50 inside the fuselage 10, so that the ventilation duct 50 can easily bypass obstacles inside the fuselage 10 to adapt to different installation positions and angle requirements.

[0048] Further, see Figure 5 As shown, the cross-section of the air outlet duct 33 along the thickness direction of the body 10 in this embodiment includes an arc-shaped surface, which is recessed in the direction away from the cleaning component 20.

[0049] Specifically, the arc-shaped air outlet channel 33 makes the airflow path more complex. The airflow is no longer a simple straight line, but flows along the curvature of the arc surface, avoiding the strong impact and vibration caused by concentrated airflow, thereby reducing the noise caused by airflow turbulence. At the same time, when the airflow passes through the air outlet channel 33, the arc-shaped air outlet channel 33 extends the airflow path, which buffers and reduces the speed of the airflow to a certain extent, thereby reducing the generation of airflow noise.

[0050] Further, see Figure 5 as well as Figure 8 As shown, the cleaning component 20 in this embodiment includes a housing 21. The projection of the housing 21 along the thickness direction of the body 10 includes a semi-circular surface. The air outlet channel 33 covers the outer periphery of the housing 21 and has a gap between it and the housing 21.

[0051] Specifically, in this embodiment, the air outlet duct 33 covers the outer periphery of the outer casing 21 with a semi-circular projection, thus guiding the airflow along the shape of the outer casing 21. Figure 5(The airflow direction in the air outlet channel 33 is shown), which helps to disperse and reflect some of the noise generated by the airflow vibration, causing the noise to be reflected and attenuated multiple times within the receiving cavity 111, thereby reducing the overall noise. At the same time, since there is a gap between the air outlet channel 33 and the outer shell 21 in this embodiment, the resonance phenomenon that may occur due to the rigid connection between the two is avoided. When the airflow passes through the air outlet channel 33, it will not directly transmit the vibration to the cleaning component 20, reducing the additional noise and vibration caused by resonance, and making the cleaning device operate more smoothly and quietly.

[0052] Further, see Figure 3 as well as Figure 6 As shown, the housing 11 in this embodiment has a first opening 113. An air outlet channel 33 is provided on the side of the first opening 113 away from the cleaning component 20. The air outlet channel 33 includes a first baffle 331 and a second baffle 332 arranged opposite to each other along a first direction. The first baffle 331 and the second baffle 332 are connected by an arc-shaped baffle 333. The cleaning component 20 is located below the first opening 113 and has a gap between it and the arc-shaped baffle 333.

[0053] Specifically, the air outlet channel 33, composed of the first baffle 331, the second baffle 332, and the arc-shaped baffle 333, can effectively guide the airflow, thereby helping to optimize airflow and reduce eddies and turbulence generated when the airflow passes through the air outlet channel 33. This reduces noise caused by airflow impact and vibration, making the cleaning device quieter and improving the comfort of the user environment. At the same time, the structure composed of the first baffle 331, the second baffle 332, and the arc-shaped baffle 333 can, to a certain extent, block the outward transmission of airflow noise. They form a relatively enclosed space, confining the airflow noise inside the air outlet channel 33, reducing the diffusion of noise to the external environment of the cleaning device, and lowering the overall noise level of the cleaning device during operation.

[0054] Furthermore, the air outlet 32 ​​in this embodiment includes one or more. When there are multiple air outlets 32, they are disposed on the same side of the suction member 31 or on opposite sides of the suction member 31. Exemplarily, the air outlet 32 ​​in this embodiment can be two, three, or more, and this application does not make a specific limitation.

[0055] Specifically, when there is only one air outlet 32, the internal air duct structure of the body 10 is simplified, making the airflow path more direct and smooth, reducing airflow turbulence in the air duct, and thus reducing noise caused by airflow turbulence. When there are multiple air outlets 32, after the air flows out through the air outlet 312 of the suction member 31, it will flow into the receiving cavity 111 through multiple air outlets 32. In this way, it can prevent strong impact and vibration caused by concentrated airflow, thereby reducing noise caused by airflow turbulence. Moreover, multiple air outlets 32 provide a certain degree of redundancy design. When one air outlet 32 ​​is blocked, the other air outlets 32 can still continue to work, so that the equipment maintains basic functions and does not cause the equipment to fail completely, thus improving the reliability and stability of the equipment.

[0056] Further, see Figures 7 to 9 As shown, the cleaning component 20 in this embodiment includes a housing 21, a cleaning element 22, and a drive motor 24. The housing 21 is disposed within the accommodating cavity 111 and has an installation space 211 and a second opening 212, which communicates with both the installation space 211 and the dust inlet 112. The cleaning element 22 has a rotating shaft 23, which is rotatably disposed within the installation space 211. The drive motor 24 is connected to the housing 11 via a flexible connector 25, and the output shaft of the drive motor 24 is abutted against the rotating shaft 23. Exemplarily, the cleaning element 22 in this embodiment includes a mid-sweep or roller brush structure; the flexible connector 25 includes a soft rubber component or other structure with good elasticity and flexibility.

[0057] Specifically, in this embodiment, the outer shell 21 is disposed within the accommodating cavity 111 to construct a relatively independent space, providing a mounting base for components such as the cleaning component 22 and the drive motor 24, and protecting the internal components to prevent the cleaning component 22 from being affected by external environmental factors. Simultaneously, under the action of the suction component 31, airflow is guided through the second opening 212, forming a specific airflow channel to ensure that dust and other impurities can be smoothly sucked into the dust inlet 112 and enter the dust collection box 40. The rotating shaft 23 of the cleaning component 22 is rotatably disposed in the mounting space 211. Driven by the drive motor 24, the rotating shaft 23 can drive the cleaning component 22 to rotate, allowing for the removal of impurities that need to be removed. The clean surface is swept and wiped to collect dust and debris, which are then sucked away by airflow through the second opening 212 and the dust inlet 112. The drive motor 24 provides power for the rotation of the cleaning component 22. The output shaft is directly connected to the rotating shaft 23 of the cleaning component 22 to transmit the rotational motion of the motor to the cleaning component 22, enabling the cleaning component 22 to rotate at a set speed and direction to achieve the cleaning function. At the same time, the flexible connector 25 can act as a buffer between the drive motor 24 and the housing 11, reducing the transmission of vibration and impact force generated by the motor to the housing 11, and avoiding loosening of parts, wear and noise caused by vibration.

[0058] Meanwhile, since the output shaft of the drive motor 24 in this embodiment is directly connected to the rotating shaft 23, there is no need to set up additional transmission devices, such as drive shafts and gearboxes. This not only reduces the components that may generate noise from the source, thereby reducing the overall noise level of the cleaning device, but also greatly reduces the space occupied in the accommodating cavity 111, effectively improving the space utilization rate of the cleaning device.

[0059] Furthermore, the drive motor 24 in this embodiment includes a brushless motor. Specifically, since the brushless motor uses an electronic commutator instead of the mechanical commutator of a traditional brushed motor, it can more precisely control the direction and magnitude of the current, enabling electrical energy to be converted into mechanical energy more efficiently. This provides a stable and powerful power output to the rotating shaft 23 of the cleaning component 22, driving the shaft 23 to rotate smoothly and effectively ensuring the normal operation of the cleaning assembly 20. Meanwhile, the friction between the brushes and commutator in existing brushed motors is one of the main sources of noise. The brushless motor in this embodiment, by using an electronic commutator instead of the mechanical commutator of a traditional brushed motor and eliminating the brush structure, fundamentally eliminates this source of noise, ensuring that the motor operates without noise caused by brush friction and commutation, thus achieving noise reduction in the cleaning device.

[0060] Further, see Figure 1 as well as Figures 10 to 11 As shown, in this embodiment, the bottom of the body 10 is also provided with a movable wheel set 60. The movable wheel set 60 includes a mounting frame 61, a movable wheel 62, a wheel hub 63, and a wheel hub motor 64. The mounting frame 61 is connected to the body 10. The movable wheel 62 is rotatably mounted on the mounting frame 61 and protrudes from the bottom of the body 10. The wheel hub 63 and the wheel hub motor 64 are provided inside the movable wheel 62, and the output shaft of the wheel hub motor 64 is connected to the wheel hub 63.

[0061] Specifically, when the cleaning device in this embodiment is in operation, the hub motor 64, installed within the moving wheel 62, drives the moving wheel 62 to rotate, thereby moving the entire cleaning device within space to perform cleaning operations. That is, the hub motor 64, as a power source, has its output shaft directly connected to the hub 63, effectively transmitting the motor's power to the moving wheel 62, ensuring the stability and reliability of power transmission. Simultaneously, since the hub motor 64 in this embodiment is installed within the moving wheel 62, and its output shaft is directly connected to the hub 63, there is no need for additional transmission devices such as drive shafts or gearboxes. This not only reduces potentially noisy components at the source, thus lowering the overall noise level of the cleaning device, but also significantly reduces the space occupied at the bottom of the machine body 10, effectively improving the space utilization rate of the cleaning device.

[0062] Furthermore, the hub motor 64 in this embodiment includes a brushless motor. Specifically, since the brushless motor uses an electronic commutator instead of the mechanical commutator of a traditional brushed motor, it can more precisely control the direction and magnitude of the current, enabling electrical energy to be converted into mechanical energy more efficiently. This provides a stable and powerful power output to the hub 63, driving the moving wheel 62 to rotate smoothly and effectively ensuring the normal operation of the equipment. Meanwhile, the friction between the brushes and commutator in existing brushed motors is one of the main sources of noise. The brushless motor in this embodiment, by using an electronic commutator instead of the mechanical commutator of a traditional brushed motor and eliminating the brush structure, fundamentally eliminates this source of noise, ensuring that the motor operates without noise caused by brush friction and commutation, thus achieving noise reduction in the cleaning device.

[0063] As can be seen from the above embodiments, this application provides an air outlet 32 ​​on the body 10, and connects the air outlet 32 ​​to the air outlet end 312 of the suction member 31 and the accommodating cavity 111 respectively. When air is drawn in by the suction member 31, the air enters the suction member 31 through the air inlet end 311 and flows out through the air outlet end 312, and then enters the accommodating cavity 111 through the air outlet 32. In this way, the air will not be directly transmitted to the outside of the body 10, and after the air enters the accommodating cavity 111, it will be dispersed in a larger space, making the airflow distribution more uniform, avoiding strong air disturbances caused by concentrated airflow discharge, and further reducing noise.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0066] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cleaning device, characterized in that, The application relates to a cleaner, which comprises: a machine body (10) provided with a shell (11) at the bottom, the shell (11) having a containing cavity (111) and a dust port (112) communicating with the containing cavity (111); a cleaning assembly (20) rotatably arranged in the containing cavity (111) and communicating with the dust port (112); a suction assembly (30) arranged in the machine body (10), the suction assembly (30) comprising a suction element (31) having an air inlet end (311) and an air outlet end (312), and an air outlet part (32) communicating with the air outlet end (312) and the containing cavity (111) respectively to convey air flowing out of the air outlet end (312) into the containing cavity (111); a dust collecting box (40) arranged in the machine body (10) and communicating with the dust port (112) and the air inlet end (311) respectively.

2. The cleaning device of claim 1, wherein, The air outlet part (32) comprises an air outlet channel (33) communicating with the air outlet end (312) through a ventilation pipe (50), and in the projection of the machine body (10) in the thickness direction, the projection of the air outlet channel (33) at least partially overlaps the projection of the cleaning assembly (20).

3. The cleaning device of claim 2, wherein, The cross section of the air outlet channel (33) in the thickness direction of the machine body (10) comprises an arc surface, which is concave towards the direction away from the cleaning assembly (20).

4. The cleaning device of claim 3, wherein, The cleaning assembly (20) comprises an outer shell (21), the projection of the outer shell (21) in the thickness direction of the machine body (10) comprises a semicircular surface, and the air outlet channel (33) is wrapped around the outer periphery of the outer shell (21) and has a gap with the outer shell (21).

5. The cleaning device of claim 2, wherein, The shell (11) has a first opening (113), the side of the first opening (113) away from the cleaning assembly (20) is provided with the air outlet channel (33), the air outlet channel (33) comprises a first baffle (331) and a second baffle (332) oppositely arranged in a first direction, the first baffle (331) and the second baffle (332) are connected through an arc baffle (333), the cleaning assembly (20) is located below the first opening (113) and has a gap with the arc baffle (333).

6. The cleaning device according to any one of claims 1 to 5, characterized in that, The air outlet part (32) comprises one or more, when the air outlet part (32) comprises multiple, the multiple air outlet parts (32) are arranged on the same side of the suction element (31) or on the opposite sides of the suction element (31).

7. The cleaning device of claim 1, wherein, The cleaning assembly (20) comprises: an outer shell (21) arranged in the containing cavity (111), and the outer shell (21) has a mounting space (211) and a second opening (212) communicating with the mounting space (211) and the dust port (112) respectively; A cleaning piece (22) has a rotating shaft (23) rotatably arranged in the installation space (211); A driving motor (24) is connected with the shell (11) through a flexible connecting piece (25), and an output shaft of the driving motor (24) is connected with the rotating shaft (23).

8. The cleaning device of claim 7, wherein, The driving motor (24) comprises a brushless motor.

9. The cleaning device of claim 1, wherein, The bottom of the machine body (10) is further provided with a moving wheel set (60), which comprises a mounting frame (61), a moving wheel (62), a wheel hub (63) and a wheel hub motor (64). The mounting frame (61) is connected with the machine body (10), the moving wheel (62) is rotatably mounted on the mounting frame (61) and protrudes from the bottom of the machine body (10), the wheel hub (63) and the wheel hub motor (64) are arranged in the moving wheel (62), and an output shaft of the wheel hub motor (64) is connected with the wheel hub (63).

10. The cleaning device of claim 9, wherein, The wheel hub motor (64) comprises a brushless motor.

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