CN222147297U

CN222147297U - Motor components and cleaning devices

Info

Publication number: CN222147297U
Application number: CN202420826742.9U
Authority: CN
Inventors: 孙磊; 李占
Original assignee: Dreame Technology Suzhou Co ltd
Current assignee: Dreame Technology Suzhou Co ltd
Priority date: 2024-04-19
Filing date: 2024-04-19
Publication date: 2024-12-10
Anticipated expiration: 2034-04-19

Abstract

The embodiment of the application provides a motor assembly and a cleaning device. The motor assembly includes a motor housing and a sound attenuation housing. The motor housing includes a first airflow passage having an exhaust port. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies protruding out of the surface of the base body. The base body is sleeved on the periphery of the motor casing through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel is communicated with the third air flow channel. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part. The motor component provided by the embodiment of the application is beneficial to reducing noise generated by the motor component.

Description

Motor assembly and cleaning device

Technical Field

The application relates to the technical field of cleaning equipment, in particular to a motor assembly and a cleaning device.

Background

In the daily life of people, intelligent household appliances such as floor sweeping machines, dust collectors, floor washing machines and the like are widely used. The intelligent household appliances such as the sweeper, the dust collector, the floor washing machine and the like comprise a motor serving as a suction source. The motor needs to perform a function of sucking air to suck sundries such as dust into a dust removing channel of the intelligent household appliance. The motors of intelligent household appliances such as a sweeper, a dust collector, a floor washing machine and the like can generate noise in the running process. Under the condition that motor noise is too loud, a user can be influenced by the noise to cause deviation of using experience effects.

Chinese patent CN219145166U discloses a motor silencing structure. The motor silencing structure comprises a silencing shell and a silencing body. The silencing shell comprises an outer cover body, an inner cover body, an end plate and an inner spacer ring which are mutually assembled and connected. The inner cover body is coaxially and equally oriented and arranged on the inner side of the outer cover body. The end plate is provided on the opening side of the housing body. An inner spacing ring is arranged on the end plate towards the inner cavity of the inner cover body. The inner spacing ring and the inner cover body are coaxially arranged. The outer cover body and the inner separation rings of the inner cover body are mutually arranged at intervals in the radial direction and form an S-shaped silencing channel. The motor amortization structure carries out the vortex to the air inlet flow in the radial of amortization casing, and although the air inlet flow can change the flow direction in the radial of amortization casing, has certain noise reduction effect to the air inlet flow, but the amortization structure of this kind of air inlet position department will greatly influence motor air inlet efficiency, can't make motor impeller position department produce great negative pressure, more can't suck through the negative pressure. In addition, the mode that the outer cover body, the inner cover body, the end plate and the inner partition ring of the silencing structure are mutually sleeved to form an airflow channel leads to the fact that the outer cover body, the inner cover body, the end plate and the inner partition ring form a multi-layer noise reduction structure in the radial direction of the silencing shell, so that the overall size of the silencing shell is larger, the occupied volume is larger, and the miniaturization design of a motor assembly is not facilitated.

Chinese patent CN219835557U discloses a self-moving device. The self-moving device includes a noise reduction structure. The noise reduction structure comprises a shell, a first current conductor and a second current conductor which are mutually assembled and connected. The first fluid director and the second fluid director are arranged in the shell. The shell, the first current-conducting body and the second current-conducting body are enclosed to form a first air channel, a second air channel, a third air channel, a fourth air channel and a fifth air channel. The suction airflow sequentially flows through the first air duct to the fifth air duct and is discharged. The noise reduction structure is used for carrying out turbulence on the suction airflow in the radial direction of the shell, so that the suction airflow can change the flow direction in the radial direction of the shell, and noise generated by the suction airflow is reduced. However, the manner that the shell, the first fluid guide body and the second fluid guide body are mutually sleeved to form the airflow channel leads to the formation of a multi-layer noise reduction shell structure on the radial direction of the noise reduction shell body, so that the overall noise reduction size is larger, the occupied volume is larger, and the miniaturization design of the motor assembly is not facilitated.

Disclosure of utility model

The embodiment of the application provides a motor assembly and a cleaning device, which are beneficial to reducing noise generated by the motor assembly.

A first aspect of an embodiment of the present application provides a motor assembly including a motor housing and a sound attenuation housing.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part.

Although the flow direction of the air inlet flow can be changed in the radial direction of the silencing shell, and the air inlet flow has a certain noise reduction effect, the noise reduction structure at the air inlet position greatly influences the air inlet efficiency of the motor, so that a large negative pressure cannot be generated at the position of the motor impeller, and suction cannot be performed through the negative pressure. The motor assembly of the embodiment of the application can be applied to cleaning devices such as a sweeper, a dust collector or a floor washing machine. The motor assembly in an operating state can suck air from the outside of the cleaning device and form a suction air flow flowing inside the cleaning device. Dirt, such as dust, at the area to be cleaned can follow the suction air flow into the cleaning device and be collected by the cleaning device. The motor assembly of the embodiment of the application can comprise a motor shell and a silencing cover. The motor housing includes a first airflow passage. A plurality of walls are arranged on the base body of the silencing cover. A third air flow passage may be formed between adjacent walls. The first air flow channel is communicated with the third air flow channel. The third air flow channel comprises at least two sub-air flow channels which are communicated with each other. At least one sub-air flow channel extends in the circumferential direction of the base body. The third air flow channel is relatively long in extension, and the sub air flow channels with different extension directions can be used for changing the flow direction of the suction air flow, so that the suction air flow changes the flow direction for a plurality of times in the axial direction of the substrate, and the silencing cover is beneficial to effectively axially turbulent flow of the suction air flow. Therefore, the silencing cover provided by the embodiment of the application can effectively disturb the suction airflow in the axial direction of the base body, so that noise generated when the suction airflow flows can be reduced. Meanwhile, the silencing cover adopted by the silencing structure is of a single-layer shell structure, a plurality of layers of silencing covers are not required to be sleeved outside the motor shell, and good noise reduction effect can be achieved.

A second aspect of an embodiment of the present application provides a motor assembly including a motor housing and a sound attenuating cap.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part. The number of the third air flow channels is more than two. At least two third air flow channels are in communication with each other.

The suction air flow flowing in one third air flow channel can partially flow into the other third air flow channel, so that the suction air flows in the two third air flow channels realize mixed flow and crosstalk, thereby being beneficial to improving the turbulence effect of the noise reduction cover on the suction air flow and further reducing noise generated when the suction air flow flows.

In some implementations, at least one wall is provided with a communication channel. The adjacent two third air flow channels are communicated through the communication channel.

In some implementations, all of the walls are provided with communication channels. Each communication channel is arranged in a staggered way. And each third airflow channel can realize mixed flow and crosstalk for more times through each communication channel with different positions so as to further improve the turbulent flow effect of the silencing cover on the suction airflow.

A third aspect of the embodiments of the present application provides a motor assembly including a motor housing and a sound attenuation housing.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part. In the third air flow channel, one of any two adjacent sub-air flow channels extends in the same direction as the axial direction of the base body, and the other extends in the same direction as the circumferential direction of the base body.

After the suction air flow flowing through the sub-air flow channel with the extending direction being the same as the axial direction of the substrate enters the sub-air flow channel with the extending direction being the same as the circumferential direction of the substrate, the flow direction bending amplitude of the suction air flow is larger, so that the flow direction of the suction air flow can be changed to a larger extent, and the suction air flow is effectively disturbed.

A fourth aspect of an embodiment of the application provides a motor assembly comprising a motor housing and a sound attenuating cap.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. Each sub-air flow channel extends helically along the axial direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part.

A fifth aspect of the present embodiment provides a motor assembly including a motor housing and a sound attenuation housing.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part. The respective extension lengths of the at least two sub-air flow paths are different.

In some implementations, the third airflow channel is located on an outer side of the base body facing away from the motor housing, and the extension length of the sub airflow channel near the air outlet is greater than the extension length of the sub airflow channel far from the air outlet.

The arrangement mode that the extension length of the sub-airflow channel far away from the air outlet part is relatively short can enable the suction airflow entering the third airflow channel to realize relatively more times of flow direction change in a shorter flowing distance, and is beneficial to turbulent flow of the suction airflow. The arrangement in which the extension length of the sub-air flow path near the air outlet portion is relatively long can be advantageous in reducing the flow resistance of the suction air flow.

A sixth aspect of the present embodiment provides a motor assembly including a motor housing and a sound-deadening housing.

The motor housing includes a first airflow passage. The first air flow channel has an air outlet. The silencing cover comprises a cylindrical base body with a containing space. The base body is provided with a plurality of wall bodies. The wall body protrudes from the surface of the base body. The matrix is sleeved on the periphery of the motor shell through the accommodating space. The exhaust port is communicated with the accommodating space. A third air flow passage is formed between adjacent walls. The first air flow channel and the third air flow channel are communicated with each other. The third air flow channel is provided with an air inlet part, an air outlet part and at least two sub-air flow channels which are mutually communicated between the air inlet part and the air outlet part. The adjacent sub-air flow passages have different respective directions of extension. At least one sub-air flow channel extends in the circumferential direction of the base body. The air flow discharged from the air outlet sequentially passes through the accommodating space and the air inlet part, enters into a plurality of sub-air flow channels and is guided out by the air outlet part. The silencing cover is of an integrated structure.

The silencing cover can be of an integrated structure, so that the integral mechanical strength of the silencing cover is improved, vibration is not easy to occur under the impact of suction airflow, the possibility of vibration noise caused by vibration of the silencing cover is reduced, and noise generated when the suction airflow flows is reduced.

In some implementations, the first air flow channel causes air flow in the first direction within the receiving space after passing through the air outlet. The substrate includes a first base surface and a second base surface. The first base surface faces away from the motor housing. The second base surface faces the motor housing, and at least part of the wall body is arranged on the first base surface so as to form a third airflow channel on the first base surface. At least one air inlet part is communicated with the accommodating space and the third air flow channel on the first basal plane. The plurality of sub-air flow channels form a third air flow channel. The air flow is guided out from the air outlet part along a second direction after passing through the air inlet part, wherein the first direction is opposite to the second direction along the axial direction of the substrate.

In some implementations, there is an axial spacing between the inlet and the outlet in the axial direction of the base.

In some implementations, at least one inlet and one outlet are respectively disposed at two ends of the substrate in an axial direction of the substrate.

In some implementations, the vent has an orthographic projection on the second base surface of the base in a radial direction of the base, and the orthographic projection of the vent on the second base surface is located between the inlet and the outlet in an axial direction of the base.

In some implementations, the air intake includes a vent hole disposed radially through the base.

In some implementations, the base includes a first end and a second end disposed opposite to each other along an axial direction of the base, and the air outlet is disposed at the second end, and the base includes a vent hole that communicates the first air flow channel and the third air flow channel.

In some implementations, the substrate has a first region and two second regions, where, along an axial direction of the substrate, two sides of the first region are respectively provided with one second region, and the first region is disposed corresponding to the exhaust port of the first airflow channel.

In some implementations, the apertures of the vent holes provided on the first region are larger than the apertures of the vent holes provided on the second region.

The suction air flow pressure output from the air outlet of the first air flow passage is relatively large. The arrangement mode that the aperture of the vent hole arranged on the first area is relatively large is beneficial to the rapid and smooth discharge of the suction airflow through the vent hole. The resistance formed by the suction air flow output by the vent holes of the second area to the suction air flow output by the vent holes of the first area is relatively small, so that the suction air flow output by the vent holes of the first area can smoothly flow to the air outlet part of the third air flow channel.

In some implementations, the total area of the openings of the plurality of ventilation holes in the second region proximate the first end is S1 and the total area of the openings of the plurality of ventilation holes in the second region proximate the second end is S2, where S2 is less than or equal to S1.

In some implementations, in the third air flow channel, at least one of the sub-air flow channels extends in the same direction as the axial direction of the base body.

In some implementations, in the third air flow channel, at least one of the sub air flow channels extends in a direction different from the circumferential direction of the base body.

In some implementations, the base includes a first base surface facing away from the motor housing, and a second base surface facing the motor housing, the second base surface providing a wall, the base surface facing an inside of the motor housing providing a third airflow channel.

In some implementations, the base includes a first base surface facing away from the motor housing and a second base surface facing the motor housing, the first base surface and the second base surface each having a wall, and the base surface facing away from the outside of the motor housing and the base surface facing the inside of the motor housing each having a third airflow channel.

In some implementations, the wall includes a plurality of first sub-walls and a plurality of second sub-walls, the first sub-walls having an extension length greater than an extension length of the second sub-walls along a radial direction of the base.

In some implementations, the motor assembly further includes a motor body, the motor housing is sleeved on the motor body, the motor housing includes a first housing and a second housing, the second housing is sleeved on the outer side of the first housing, a first airflow channel is formed between the first housing and the second housing, the first housing has a containing chamber, and the motor body is connected to the first housing.

The motor body is arranged in the first shell, so that heat generated during operation of the motor body can be conducted to the first shell and dissipated through the first shell. The outer surface of the first shell faces the first air flow channel, so that air flowing in the first air flow channel can quickly carry away heat on the first shell, the first shell and the motor body are effectively cooled, and good heat dissipation of the motor body is guaranteed.

In some implementations, the first housing has a boss disposed facing the exhaust port of the first airflow channel with a space therebetween.

The boss that sets up on the first casing can change the flow area of first air current passageway, and the boss can effectively vortex the air current that flows in the first air current passageway simultaneously to be favorable to reducing the noise that the air current that flows in the first air current passageway produced. In addition, the boss can increase the heat dissipation area of the first shell, and is favorable for improving the heat dissipation efficiency of the first shell.

In some implementations, the motor body includes a rotor and a stator, the stator and at least a portion of the rotor are disposed in the receiving cavity, the stator is in contact with an inner wall of the first housing, and a portion of the first housing on which the stator is mounted is disposed proximate to the exhaust port of the first airflow channel.

The stator contacts with the inner wall of the first shell, so that the heat conduction efficiency between the stator and the first shell is improved, the heat generated by the stator is conducted to the first shell quickly, and the heat dissipation is realized through the first shell.

In some implementations, the motor assembly further includes a wind scooper disposed at one end of the second housing, the wind scooper having a first air inlet, the first air flow channel being in communication with the first air inlet. The motor body further comprises a movable impeller, the movable impeller is arranged in the air guide cover, the rotor penetrates out of the first shell, the movable impeller is connected to the rotor, and the rotor is used for driving the movable impeller to rotate so that air flow is led into the first air flow channel after passing through the first air inlet.

In some realizable modes, the motor shell further comprises a fixed impeller, the fixed impeller comprises a wheel body and a plurality of blades, the wheel body is arranged between the first shell and the movable impeller along the axial direction of the rotor, the wheel body is coaxial with the movable impeller, the wheel body is fixedly connected with the first shell, the plurality of blades are arranged between the wheel body and the second shell along the circumferential interval of the wheel body, an air channel is arranged between every two adjacent blades, the air channel is communicated with the first air flow channel and the first air inlet, so that air flow sucked by the movable impeller enters from the first air inlet and then flows through the air channel, and the air is discharged from the air outlet of the first air flow channel.

In some realizable modes, a second airflow channel is arranged on one side of the base body facing the motor shell, the first airflow channel, the second airflow channel and the third airflow channel are communicated, the maximum depth of the third airflow channel is A, and the maximum depth of the second airflow channel is B along the radial direction of the base body, wherein B/3 is less than or equal to A and less than or equal to B.

Under the condition that the maximum depth of the third air flow channel is smaller than B/3, the depth of the third air flow channel is relatively smaller, and the maximum extension length of the wall body along the radial direction of the base body is smaller, so that the turbulence effect of the silencing cover on the sucked air flow is relatively deviated, and noise generated during sucking the air flow is not reduced. Under the condition that the maximum depth of the third airflow channel is larger than B, the depth of the third airflow channel is relatively larger, and the maximum extension length of the wall body along the radial direction of the base body is larger, so that the size of the silencing cover in the radial direction of the base body is larger, and the silencing cover occupies more installation space under the condition that the silencing cover is applied to the cleaning device, and is unfavorable for compact design of the cleaning device.

A seventh aspect of the embodiments of the present application provides a cleaning apparatus including a motor assembly and a motor housing. The motor assembly is disposed within the motor housing. The motor cover comprises a second air inlet and a main air outlet. The second air inlet is communicated with the first air flow channel. The air outlet part of the third air flow channel is communicated with the main air outlet.

In some implementations, the airflow is directed in a first direction through the exhaust port. The first direction is the same as the axial direction of the base.

In some implementations, the substrate includes a first base surface and a second base surface. The first base surface faces the motor cover. The second base surface faces away from the motor housing. The first base surface is provided with wall bodies, and at least part of the wall bodies are abutted against the motor cover. The base body includes a first end and a second end disposed opposite each other along an axial direction of the base body. At least one air inlet is disposed proximate the first end. The cavity formed between the motor cover and the base body is communicated with the accommodating space in the base body through the air inlet part. The motor cover is sealingly connected to the first end. The air flow guided out along the first direction after passing through the exhaust port enters the third air flow channel through the air inlet part and is guided out along the second direction to the air outlet part. Wherein the first direction is opposite to the second direction.

In some implementations, there is a separation distance L1 between the base and the motor housing along the radial direction of the base. The third air flow channel has a width W1 and an extension length H, and when W1 is more than or equal to 5mm and less than or equal to 1/2 xL1 and less than or equal to 1/4 xH and less than or equal to 20mm, and L1 is larger along the first direction, W1 is reduced.

In some realizable modes, along the radial direction of the base body, a spacing distance L1 is arranged between the base body and the motor shell, a spacing distance L2 is arranged between the top surface of the wall body and the motor cover, in the longitudinal section of the motor cover and the base body cut along the axis of the base body, the angle between the outer surface of the base body and the inner wall of the motor cover is alpha, the angle between the top surface of the wall body and the inner wall of the motor cover is beta, wherein the angle between the top surface of the wall body and the inner wall of the motor cover is 45 degrees or more and equal to 2 beta is or more and equal to 20 degrees, and in the first direction, both L1 and L2 are gradually increased or gradually decreased.

Drawings

In order to more clearly illustrate the application or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a motor assembly according to an embodiment of the present application;

FIG. 2 is a schematic view of a motor assembly in partial cross-section according to one embodiment of the application;

FIG. 3 is a schematic view of a part of a motor housing according to an embodiment of the present application;

FIG. 4 is a schematic view of a partially cut-away structure of a muffler cover according to an embodiment of the present application;

FIG. 5 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 6 is a schematic view of a part of a motor assembly according to an embodiment of the present application;

FIG. 7 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 8 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 9 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 10 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 11 is a schematic view of a part of a muffler cover according to an embodiment of the present application;

FIG. 12 is a schematic view of a motor assembly in partial cross-section according to an embodiment of the application;

FIG. 13 is a schematic view showing a partial structure of a muffler cover according to an embodiment of the present application;

FIG. 14 is a schematic cross-sectional view of the structure of FIG. 13 taken along the W-W direction;

FIG. 15 is a schematic view of a partially cut-away structure of a sound attenuating cap according to an embodiment of the present application;

FIG. 16 is a schematic view of a cleaning device according to an embodiment of the present application, partially in section;

FIG. 17 is a schematic view of a cleaning apparatus in partial cross-section according to an embodiment of the present application;

FIG. 18 is a schematic view of a cleaning apparatus according to an embodiment of the present application, partially in section;

fig. 19 is a schematic view showing a partially cut-away structure of a cleaning device according to an embodiment of the present application.

Reference numerals illustrate:

10. a motor assembly;

20. 21 parts of motor body, 21 parts of stator, 22 parts of rotor, 23 parts of movable impeller;

30. The motor comprises a motor shell, a first air inlet, a first shell, a 311, a boss, a 32, a second shell, a 33, a fixed impeller, a 331, a wheel body, a 332 and blades, wherein the motor shell is provided with a first air inlet;

40. A sound deadening hood;

41. 41aa of a base body, 41a of a containing space, 41a of a first end, 41b of a second end, 41c of a first area, 41d of a second area, 411 of a vent hole;

42. 42a, a first sub-wall, 42b, a second sub-wall, 421 and a communication channel;

50. A shock absorbing member;

60. a cover member 60a, a ventilation inlet 60b, a ventilation outlet;

100. 100a, an exhaust port;

200. A second airflow passage;

300. A third air flow channel, 300a, an air outlet part, 301, a sub air flow channel;

400. A housing chamber;

500. The motor cover, 500a, the second air inlet, 500b, the main air outlet;

600. damping structural members;

700. a wind scooper;

z1, a first direction;

z2, the second direction.

Detailed Description

The embodiment of the application provides a cleaning device. The cleaning device can be applied to an industrial environment or a household environment to effectively replace manpower to clean the area to be cleaned, and improve the cleaning work efficiency. The cleaning device may be a sweeper, cleaner or scrubber.

The cleaning device of embodiments of the present application may include a motor housing and a motor assembly. The motor assembly is disposed within the motor housing. When the motor assembly is in a working state, the motor assembly can suck air in the external environment to form sucked air flow with high air flow rate. Dust and other impurities at the area to be cleaned can enter the cleaning device along with the suction airflow formed by the motor assembly so as to be collected by the cleaning device, so that the cleaning device can effectively clean the area to be cleaned.

Fig. 1 schematically shows a partial structure of a motor assembly 10. Fig. 2 schematically illustrates a partial cross-sectional configuration of the motor assembly 10. Referring to fig. 1 and 2, a motor assembly 10 according to an embodiment of the present application may include a motor body 20. The motor body 20 serves to generate suction to form negative pressure at the motor assembly 10 so that air outside the cleaning device can be sucked. The motor body 20 may include a stator 21, a rotor 22, and a rotor impeller 23. The impeller 23 is connected to the rotor 22. In the energized state of the motor body 20, the rotor 22 is rotatable relative to the stator 21. The rotor 22 synchronously drives the impeller 23 to rotate. The motor assembly 10 may be used to draw air as the impeller 23 rotates to create a suction airstream.

The motor assembly 10 of an embodiment of the present application may include a motor housing 30. The motor housing 30 includes a receiving chamber 400. The motor housing 30 is sleeved on the motor body 20. The motor housing 30 may be sleeved outside the motor body 20. The motor body 20 may be detachably connected with the motor housing 30. At least a portion of the motor body 20 may be located within the receiving chamber 400. The motor housing 30 can protect the motor body 20, and reduce the possibility of structural damage of the motor body 20 due to impact.

In an embodiment of the present application, the motor housing 30 includes a first airflow passage 100. The first air flow passage 100 has an air outlet 100a. When the motor assembly 10 is in operation, suction air flow may enter the first air flow channel 100. After the suction airflow flows through the first airflow passage 100, the suction airflow is discharged from the exhaust port 100a of the first airflow passage 100. The exhaust port 100a of the first air flow passage 100 is provided at the outer surface of the motor housing 30.

In some embodiments, the motor housing 30 includes a first housing 31 and a second housing 32. The second housing 32 is sleeved outside the first housing 31. A first air flow passage 100 is formed between the first housing 31 and the second housing 32. The first housing 31 has a housing chamber 400. The motor body 20 is connected to the first housing 31. The stator 21 of the motor body 20 is located in the accommodation chamber 400 of the first housing 31. At least a portion of the rotor 22 is positioned within the receiving chamber 400.

The motor body 20 is disposed in the first housing 31, so that heat generated during operation of the motor body 20 can be conducted to the first housing 31 and dissipated through the first housing 31. The outer surface of the first housing 31 faces the first air flow channel 100, so that the air flowing in the first air flow channel 100 can quickly carry away the heat on the first housing 31, so as to effectively cool the first housing 31 and the motor body 20, and ensure that the motor body 20 achieves good heat dissipation.

In some examples, the stator 21 is in contact with an inner wall of the first housing 31, thereby facilitating an increase in heat conduction efficiency between the stator 21 and the first housing 31, facilitating rapid conduction of heat generated by the stator 21 to the first housing 31, and achieving heat dissipation through the first housing 31. The portion of the first housing 31 where the fixed stator 21 is mounted is disposed near the exhaust port 100a of the first air flow passage 100.

In some embodiments, the first housing 31 has a boss 311. The boss 311 is disposed facing the exhaust port 100a of the first air flow channel 100 with a space between the boss 311 and the exhaust port 100a of the first air flow channel 100. The boss 311 is located in the flow path of the air flow in the first air flow channel 100. The boss 311 disposed on the first housing 31 can change the flow area of the first airflow channel 100, and the boss 311 can effectively disturb the airflow flowing in the first airflow channel 100, so as to reduce noise generated by the airflow flowing in the first airflow channel 100. In addition, the boss 311 can increase the heat dissipation area of the first housing 31, which is beneficial to improving the heat dissipation efficiency of the first housing 31.

In some embodiments, the motor housing 30 includes a first air intake 30a. The first air flow channel 100 communicates with the first air intake port 30a. When the motor assembly 10 is in an operating state, the suction airflow may enter the first airflow channel 100 through the first air inlet 30a.

In some examples, the rotor 22 passes out of the first housing 31 in the axial direction of the motor body 20. The impeller 23 is connected to the rotor 22. The movable impeller 23 is located in the first air flow passage 100, and the movable impeller 23 is disposed facing the first air intake port 30a in the axial direction of the motor body 20.

In some examples, the first air inlet 30a of the motor housing 30 is disposed corresponding to the impeller 23 of the motor body 20 along the axial direction of the rotor 22. The axial direction of the motor body 20 is the same as the axial direction of the rotor 22. In the energized state of the stator 21 of the motor body 20, the stator 21 can drive the rotor 22 to rotate. The rotor 22 drives the impeller 23 to rotate. When the impeller 23 rotates, the suction air flow formed by the suction air of the motor assembly 10 may sequentially enter the first air inlet 30a and the first air flow channel 100.

In some examples, the motor assembly 10 further includes a wind scooper 700. One end of the second housing 32 is provided with a wind scooper 700. The air guide cover 700 has a first air inlet 30a. The first air flow channel 100 communicates with the first air intake port 30a.

The impeller 23 of the motor body 20 is disposed in the air guide cover 700. The rotor 22 is used for driving the impeller 23 to rotate, so that the air flow is led into the first air flow channel 100 after passing through the first air inlet 30 a.

In some examples, fig. 3 schematically shows a partial structure of the motor housing 30. Referring to fig. 2 and 3, the motor housing 30 further includes a stator vane 33. The fixed impeller 33 is disposed in the first air flow passage 100. The air flow sucked by the movable impeller 23 may flow through the fixed impeller 33 and be discharged from the air outlet 100a of the first air flow passage 100. The stator vane 33 may provide a flow guiding effect on the suction airstream. The suction air flow can regularly flow in the fixed impeller 33, which is beneficial to reducing the flow loss of the suction air flow in the flowing process of the fixed impeller 33, thereby being beneficial to playing a role of noise reduction and reducing the flow loss of the air flow.

In some examples, stator impeller 33 includes a wheel body 331 and a plurality of blades 332. The wheel body 331 is disposed between the first housing 31 and the impeller 23 in the axial direction of the rotor 22. The axial direction of the rotor 22 is the same as the axial direction of the base 41. The wheel 331 is coaxial with the impeller 23, and the wheel 331 is fixedly connected with the first housing 31. The rotor 22 is connected to the rotor blade wheel 23 through the end of the wheel body 331. The plurality of blades 332 are disposed at intervals along the circumferential direction of the wheel body 331. The plurality of blades 332 are disposed between the wheel 331 and the second housing. Wherein there is an air duct between adjacent vanes 332. The air duct communicates with the first air flow channel 100 and the first air inlet 30a, so that the air flow sucked by the impeller 23 enters from the first air inlet 30a, flows through the air duct, and is discharged from the air outlet 100a of the first air flow channel 100.

Fig. 4 schematically shows a partially cut-away structure of the muffler cover 40. Fig. 5 schematically shows a partial structure of the muffler cover 40. Referring to fig. 1-5, a motor assembly 10 according to an embodiment of the present application may include a sound dampening housing 40. The noise reduction cover 40 is sleeved outside the motor housing 30. The muffler cover 40 may block the exhaust port 100a of the first air flow passage 100. The suction air flow discharged from the first air flow passage 100 may be blocked by the muffler cover 40. The muffler cover 40 may be used to change the flow direction of the suction air flow, and the muffler cover 40 may also disturb the suction air flow, so that noise generated when the suction air flow flows may be advantageously reduced. The noise generated by the flow of the suction airstream is the primary noise source of the motor assembly 10.

The muffler cover 40 of the embodiment of the present application is disposed on the air outlet side of the motor assembly 10. The muffler cover 40 does not affect the air intake efficiency at the first air inlet 30a, so that the motor assembly 10 can be ensured to generate the required air flow suction amount, so as to ensure that the motor assembly 10 generates the required negative pressure. Thus, when the motor assembly 10 is in an operating state, the motor assembly 10 can suck air from the external environment to form a sucked air flow with a relatively high air flow rate. Dust and the like in the area to be cleaned may enter the cleaning device following the suction air flow formed by the motor assembly 10 to be collected by the cleaning device, so that the cleaning device may effectively clean the area to be cleaned.

The sound attenuating cap 40 of an embodiment of the present application may include a base 41. The base 41 is sleeved on the motor housing 30. The base 41 is cylindrical and the base 41 has a housing space 41aa (see fig. 4). At least part of the motor body 20 may be located in the accommodating space 41 aa. In some examples, the axial direction of the base 41 may be the same as the axial direction of the motor body 20. The base 41 is fitted around the outer periphery of the motor housing 30 through the accommodation space 41 aa. At least part of the motor housing 30 is located in the accommodating space 41 aa. The exhaust port 100a of the first air flow passage 100 is provided facing the inner wall of the base 41. The exhaust port 100a of the first air flow passage 100 communicates with the accommodating space 41 aa.

In some implementations, the side of the base 41 facing the motor body 20 is provided with a second airflow channel 200. The first air flow channel 100 communicates with the second air flow channel 200. When the motor assembly 10 is in operation, suction air flow may enter the first air flow channel 100. After the suction airstream flows through the first airstream channel 100, the suction airstream exits the first airstream channel 100 and enters the second airstream channel 200. After the suction airflow flows through the second airflow passage 200, the suction airflow may finally flow to the outside of the base 41 through the base 41.

The sound attenuating cover 40 of an embodiment of the present application may include a plurality of walls 42. Along the radial direction of the base 41, the wall body 42 is convexly arranged on the surface of the base 41. The radial direction of the base 41 is perpendicular to the axial direction of the base 41. A third air flow channel 300 is formed between adjacent walls 42. For example, a third air flow channel 300 is formed between two adjacent walls 42. Along the radial direction of the base 41, at least one of the inside and the outside of the base 41 is provided with a wall body 41 and a third air flow passage 300. The substrate 41 may have a plurality of third air flow passages 300 formed therein. The first air flow channel 100 and the third air flow channel 300 communicate with each other.

The third air flow passage 300 is provided with an air inlet portion and an air outlet portion 300a. The air flow discharged from the air outlet 100a of the first air flow channel 100 is guided out along the air outlet 300a of the third air flow channel 300 after passing through the air inlet. Illustratively, there is an axial spacing between the intake and exhaust ports 100a in the axial direction of the base 41. Illustratively, at least one air inlet portion and one air outlet portion 300a are respectively provided at both ends of the base 41 in the axial direction of the base 41.

The third air flow path 300 includes at least two sub-air flow paths 301 provided between the air inlet portion and the air outlet portion 300a and communicating with each other. The extending directions of the adjacent two sub-air flow paths 301 are different. The extending direction of the sub-air flow path 301 may refer to the flow direction of the air flow in the sub-air flow path 301 under the guiding action of the wall body 42 and the sub-air flow path 301. For example, the direction of extension may be the same as indicated by the dashed arrow in fig. 1. When the suction air flow encounters the wall 42 and the third air flow channel 300, the suction air flow entering the third air flow channel 300 may flow into the respective sub-air flow channel 301. When the suction airflow can flow from one sub-airflow channel 301 to the next sub-airflow channel 301 with different extending directions, the flowing direction of the suction airflow can also be changed, so as to be beneficial to effectively turbulent the suction airflow by the silencing cover 40.

In some implementations, at least one sub-airflow channel 301 extends along the circumference of the base 41. The air flow discharged from the air outlet 100a sequentially passes through the accommodating space 41aa and the air inlet portion, then enters the plurality of sub-air flow channels 301, and is guided out by the air outlet portion 300 a.

Along the axial direction of the base 41, the base 41 includes opposite first and second ends 41a, 41b. The third air flow channel 300 extends in the direction from the first end 41a to the second end 41b. The outlet 300a of the third flow channel 300 is provided at the second end 41b.

In some implementations, the side of the base 41 facing the motor body 20 is provided with a second airflow channel 200. The first air flow channel 100, the second air flow channel 200 are in communication with the second air flow channel 200.

The wall 42 and the third air flow channel 300 provided on the muffler cover 40 according to the embodiment of the present application may have relatively regular structures as shown in fig. 1 and 5. Fig. 6 schematically shows a partial structure of the motor assembly 10. The wall 42 and the third air flow path 300 provided on the muffler cover 40 according to the embodiment of the present application may have a relatively irregular structure as shown in fig. 6.

The motor assembly 10 of the embodiment of the application can be applied to cleaning devices such as a sweeper, a dust collector or a floor washer. The motor assembly 10 in an operating state can suck air from the outside of the cleaning device and form a suction air flow flowing inside the cleaning device. Dirt, such as dust, at the area to be cleaned can follow the suction air flow into the cleaning device and be collected by the cleaning device. The motor assembly 10 of the present embodiment may include a motor housing 30 and a sound dampening housing 40. The motor housing 30 includes a first airflow passage 100. The base 41 of the muffler cover 40 is provided with a plurality of walls 42. A third air flow channel 300 may be formed between adjacent walls 42. The first air flow channel 100 communicates with the third air flow channel 300. The third air flow channel 300 comprises at least two sub-air flow channels 301 communicating with each other. At least one sub-air flow path 301 extends in the circumferential direction of the base 41. The third air flow path 300 itself has a relatively long extension length as a whole, and the third air flow path 300 having the sub-air flow paths 301 having different extension directions can be used to change the flow direction of the suction air flow so that the suction air flow changes the flow direction a plurality of times in the axial direction of the base 41, whereby the muffler cover 40 is advantageous for effective axial turbulence of the suction air flow. Therefore, the muffler cover 40 according to the embodiment of the present application can effectively disturb the suction airflow in the axial direction of the base 41, thereby facilitating reduction of noise generated when the suction airflow flows. Meanwhile, as the silencing cover 40 adopted by the silencing structure of the embodiment of the application is of a single-layer shell structure, a better noise reduction effect can be realized without sleeving a multi-layer shell structure outside the motor shell 30, compared with the prior art, the size of the silencing structure in the radial direction of the motor shell 30 can be effectively reduced, the miniaturization design of the silencing cover 40 is facilitated, and the miniaturization design of the motor assembly 10 is further facilitated.

In addition, the wall body 42 is disposed on the outer surface of the base 41, so that the whole of the noise-reducing cover 40 formed by the base 41 and the wall body 42 has relatively high mechanical strength, and the noise-reducing cover 40 is not easy to vibrate under the impact of the suction airflow, which is beneficial to reducing the possibility of vibration noise generated by the vibration of the noise-reducing cover 40, and further is beneficial to reducing the noise generated when the suction airflow flows.

In some implementations, referring to fig. 1, 2, 5, or 6, the base 41 is provided with a wall 42 facing away from the outer surface of the motor housing 30. The base 41 includes a first base surface and a second base surface. The first base surface faces away from the motor housing 30. The second base surface faces the motor housing 30. The first base surface of the base body 41 facing away from the motor housing 30 may be defined as an outer surface of the base body 41. The second base surface of the base body 41 facing the motor housing 30 may be defined as an inner surface of the base body 41.

In some implementations, the base 41 is provided with a third air flow channel 300 facing away from the outside of the motor housing 30. The third airflow passage 300 includes an inlet portion and an outlet portion 300a. A portion of the wall 42 is disposed on the first base surface of the base 41 to form a third air flow channel 300 on the first base surface.

At least one air inlet communicates with the accommodating space 41aa of the base 41 and the third air flow passage 300 on the first base surface. The plurality of sub-air flow paths 301 form a third air flow path 300.

The outlet 300a of the third flow channel 300 may be provided at the second end 41b of the base 41. The suction air flow may enter the third air flow channel 300 from the air inlet portion of the third air flow channel 300, and then, along the extending direction of the third air flow channel 300, the suction air flow flows toward the air outlet portion 300a of the third air flow channel 300 and is finally guided out from the air outlet portion 300a of the third air flow channel 300.

The extending direction of the third air flow channel 300 may refer to the flowing direction of the air flow in the third air flow channel 300 under the guiding action of the wall body 42 and the third air flow channel 300. The third airflow channel 300 may be used to guide the suction airflow to flow along the axial direction of the base 41, so that the suction airflow changes its direction multiple times in the axial direction of the base 41, thereby the noise reduction cover 40 performs an axial turbulence effect on the suction airflow, and reduces noise generated when the suction airflow flows.

The first air flow channel 100 allows the air flow to flow in the first direction Z1 in the accommodating space 41aa of the base 41 after passing through the air outlet 100 a. The air flow is guided out from the air outlet 300a along the second direction Z2 after passing through the air inlet. The first direction Z1 and the second direction Z2 are the same as the axial direction of the base 41. Along the axial direction of the base 41, the first direction Z1 (the bottom-up direction in the state shown in fig. 2) is opposite to the second direction Z2 (the top-down direction in the state shown in fig. 2).

In some embodiments, vent 100a has an orthographic projection on a second base surface of base 41 in a radial direction of base 41. In the axial direction of the base 41, the orthographic projection of the exhaust port 100a on the second base surface of the base 41 may be located between the inlet portion and the outlet portion 300a of the third air flow channel 300.

In some embodiments, the base 41 may include a vent 411. The air intake portion of the third air flow passage 300 includes a vent 411 penetrating the base 41 in the radial direction of the base 41.

In some embodiments, the base 41 may include a vent 411. The vent 411 is for passing a suction airflow. The vent 411 communicates the first air flow passage 100 and the third air flow passage 300. Vent holes 411 are correspondingly arranged between two adjacent walls 42. In some examples, the air inlet of the third air flow channel 300 may be disposed corresponding to the air vent 411 of the base 41. The suction air discharged from the vent 411 of the base 41 may enter the air inlet portion of the third air flow path 300, and then the suction air flows toward the air outlet portion 300a of the third air flow path 300 and finally is discharged from the air outlet portion 300a of the third air flow path 300.

In some embodiments, the outlet portion 300a of the third airflow channel 300 is disposed proximate to the first air inlet 30 a. The air outlet 300a of the third air flow path 300 and the first air inlet 30a are disposed on the same side of the motor assembly 10 along the axial direction of the base 41. In some examples, the suction airflow in the first air inlet 30a may flow in a direction opposite to that of the suction airflow discharged from the air outlet 300a of the third airflow channel 300.

In an embodiment of the present application, referring to fig. 5, the third air flow channel 300 includes a plurality of sub-air flow channels 301 that are sequentially communicated with each other. In the extending direction of the third air flow passage 300, a plurality of sub air flow passages 301 are disposed in communication with each other in order. In the third air flow path 300, at least two sub-air flow paths 301 are different in extending direction.

Illustratively, adjacent two sub-airflow channels 301 each extend in a different direction. Suction airflow entering the third airflow channel 300 may flow through the respective sub-airflow channels 301. When the suction air flows from one sub-air flow channel 301 to the next sub-air flow channel 301, the flow direction of the suction air flow can be changed, so that effective turbulence can be performed on the suction air flow.

In some implementations, the motor assembly 10 may draw an airflow into the first airflow channel 100 of the motor assembly 10 when applied to a cleaning device. During the process of the suction airflow entering the third airflow channel 300 from the first airflow channel 100, the flow direction of the suction airflow may be reversed, so that the flow direction of the suction airflow in the first airflow channel 100 is different from the flow direction of the suction airflow in the third airflow channel 300. For example, after the suction airstream enters the third airstream channel 300 from the second airstream channel 200, the suction airstream may be reversed in direction by 180 ° such that the suction airstream flows in the second airstream channel 200 in opposition to the suction airstream flowing in the third airstream channel 300.

In some implementations, referring to fig. 2, 4, and 5, the first end 41a and the second end 41b are disposed opposite each other along the axial direction of the base 41. Along the axial direction of the base 41, the first end 41a of the base 41 is far from the first air inlet 30a, and the second end 41b is near the first air inlet 30a. The third air flow passage 300 provided outside the muffler cover 40 has an inlet portion and an outlet portion 300a. The air intake portion of the third air flow passage 300 is disposed away from the second end portion 41 b. The outlet 300a of the third flow channel 300 is arranged close to the second end 41 b.

The suction air flow entering the third air flow channel 300 flows through the respective sub-air flow channels 301 and is finally discharged from the air outlet 300a of the third air flow channel 300. Since the third air flow path 300 of the silencer cover 40 can form a relatively long turbulent flow path in the direction from the first end 41a to the second end 41b of the base 41, and the sub-air flow path 301 of the third air flow path 300 can effectively increase the number of changes in the flow direction of the suction air flow, the silencer cover 40 can effectively turbulent the suction air flow in the axial direction of the base 41, thereby contributing to the reduction of noise generated when the suction air flow flows.

In an embodiment of the present application, the material of the motor housing 30 may be plastic. The material of the noise attenuation cover 40 may be plastic.

In some realizable forms, fig. 7 schematically shows a partial structure of the sound-deadening cap 40. Referring to fig. 7, in the extending direction of the third air flow passage 300, the cross-sectional area of the third air flow passage 300 increases, i.e., the ventilation amount of the third air flow passage 300 increases. In the process of flowing the suction air flow from the air inlet portion to the air outlet portion 300a of the third air flow channel 300, the air pressure of the suction air flow tends to be relatively reduced, so that noise generated when the suction air flow flows is reduced.

In some examples, the cross-sectional area of the third airflow channel 300 increases gradually in the direction of extension of the third airflow channel 300, i.e. the ventilation of the third airflow channel 300 increases gradually. The cross-sectional area of the third air flow channel 300 is larger as it is closer to the air outlet 300a of the third air flow channel 300 in each cross-section of the third air flow channel 300. The size of the cross-sectional area of the third air flow channel 300 may vary.

In some realizable forms, fig. 8 schematically shows a partial structure of the sound-deadening cap 40. Referring to fig. 8, the number of the third air flow passages 300 provided outside the muffler cover 40 is two or more. At least two third air flow passages 300 may communicate with each other. The suction air flowing in one third air flow channel 300 may partially flow into the other third air flow channel 300, so that the suction air in the two third air flow channels 300 can realize mixed flow and crosstalk, which is beneficial to improving the turbulence effect of the noise reduction cover 40 on the suction air flow, and further reducing the noise generated when the suction air flow flows.

In some examples, any two adjacent third airflow channels 300 may be mutually communicated in all third airflow channels 300 provided by the silencing cover 40, so that the number of times of mixing and crosstalk of the suction airflow in the third airflow channels 300 may be further effectively increased.

In some examples, at least one wall 42 is provided with a communication channel 421. The communication passage 421 communicates adjacent two third air flow passages 300. The suction airflows flowing in one third airflow channel 300 can partially flow into the other third airflow channel 300 through the corresponding communication channels 421, so that the suction airflows in the two third airflow channels 300 realize mixed flow and crosstalk, thereby being beneficial to improving the turbulence effect of the noise reduction cover 40 on the suction airflows. Illustratively, one or more communication channels 421 may be disposed on at least one wall 42, and the number of communication channels 421 is not specifically limited in the embodiments of the present application.

Illustratively, as shown in fig. 8, all the wall bodies 42 are provided with the communication passages 421, and the respective communication passages 421 are arranged in a staggered manner, i.e., the positions at which the respective communication passages 421 are arranged are different. For example, the communication passage 421 provided on one wall 42 and the communication passage 421 provided on the other wall 42 adjacent thereto are not provided to face each other. The communication passage 421 provided in one wall 42 and the communication passage 421 provided in the other adjacent wall 42 are offset from each other in the axial direction of the base 41. Each third airflow channel 300 can realize mixed flow and crosstalk for more times through each communication channel 421 with different positions, so as to further improve the turbulence effect of the noise reduction cover 40 on the suction airflow.

Illustratively, in the cross section of the base 41 cut corresponding to any one of the communication channels 421, only a cross section of one communication channel 421 exists in the cross section. The cross section of the base 41 is perpendicular to the axial direction of the base 41.

In some implementations, in the third airflow channel 300, at least one sub airflow channel 301 extends in the same direction as the axial direction of the base 41. After entering the sub-air flow passage 301 having the same extension direction as the axial direction of the base 41, the suction air flow may have the same flow direction as the axial direction of the base 41. The sub-airflow channels 301 with different extending directions can effectively change the flow direction of the suction airflow, so as to effectively disturb the suction airflow.

In some implementations, in the third airflow channel 300, at least one sub airflow channel 301 extends in the same direction as the circumference of the base 41. The circumferential direction of the base 41 refers to a direction surrounding the axial direction of the base 41. After entering the sub-air flow passage 301 extending in the same direction as the circumferential direction of the base 41, the suction air flow may flow in a direction perpendicular to the axial direction of the base 41. The sub-airflow channels 301 with different extending directions can effectively change the flow direction of the suction airflow, so as to effectively disturb the suction airflow. In some examples, the substrate 41 is a cylindrical structure. For example, the base 41 may have a cylindrical structure. The axial direction of the base 41 is the axial direction of the base 41.

In some implementations, in the third airflow channel 300, at least one sub airflow channel 301 extends in a direction different from the circumferential direction of the base 41.

In some possible ways, referring to fig. 8, in the third air flow channel 300, one of any adjacent two sub-air flow channels 301 extends in the same direction as the axial direction of the base 41, and the other extends in the same direction as the circumferential direction of the base 41. After the suction air flow flowing through the sub-air flow channel 301 with the same extension direction as the axial direction of the base 41 enters the sub-air flow channel 301 with the same extension direction as the circumferential direction of the base 41, the flow direction bending amplitude of the suction air flow is larger, so that the flow direction of the suction air flow can be changed to a larger extent, and turbulence can be effectively carried out on the suction air flow. In some examples, the substrate 41 is a cylindrical structure. For example, the base 41 may have a cylindrical structure. The axial direction of the base 41 is the axial direction of the base 41.

In some realizable forms, fig. 9 schematically shows a partial structure of the muffler cover 40. Referring to fig. 9, in the third air flow path 300, each sub-air flow path 301 extends spirally in the axial direction of the base 41. The extending direction of any one of the sub-air flow paths 301 is different from the axial direction of the base 41 and also from the circumferential direction of the base 41. In some examples, the substrate 41 may be a cylindrical structure. The axial direction of the base 41 is the axial direction of the base 41.

In some embodiments, fig. 10 schematically shows a partial structure of the muffler cover 40. Referring to fig. 10, in the third air flow path 300, the respective extension lengths of at least two sub-air flow paths 301 may be different. In some examples, the sub-airflow channels 301 proximate to the outlet 300a extend longer than the sub-airflow channels 301 distal to the outlet 300 a. The arrangement of the sub-airflow channels 301 far from the air outlet 300a with a relatively short extension length can enable the suction airflow entering the third airflow channel 300 to realize relatively more times of flow direction change within a shorter flow distance, which is beneficial to turbulent flow of the suction airflow. The relatively long extension of the sub-air flow path 301 near the air outlet 300a may be advantageous in reducing the flow resistance of the suction air flow.

In the embodiment of the present application, fig. 11 schematically shows a partial structure of the muffler cover 40. Referring to fig. 11, the base 41 includes a plurality of vent holes 411. The plurality of ventilation holes 411 may be spaced apart along the extension direction of the third airflow path 300. The plurality of ventilation holes 411 may simultaneously deliver suction airflows into the corresponding third airflow channels 300 to increase the intake air amount of the third airflow channels 300. In addition, the substrate 41 can effectively divide the suction airflow in such a way that the suction airflow is conveyed through the plurality of ventilation holes 411, so as to facilitate improving the turbulence effect of the substrate 41 on the suction airflow. The suction airflow output by the vent 411 far from the air outlet 300a may mix with and cross-talk with the suction airflow output by the vent 411 close to the air outlet 300a, so as to facilitate improving the turbulence effect of the muffler cover 40 on the suction airflow.

In some embodiments, the shape of the vent 411 may be circular, oval, or polygonal. For example, the vent 411 may be triangular, rectangular, hexagonal in shape.

In some embodiments, a plurality of ventilation holes 411 are provided for each third airflow channel 300.

In some embodiments, referring to fig. 11, the substrate 41 has a first region 41c and a second region 41d. The first region 41c is disposed corresponding to the exhaust port 100a of the first air flow passage 100. The second regions 41d are provided on both sides of the first region 41c in the axial direction of the base 41. Illustratively, the substrate 41 has a first region 41c and two second regions 41d. Along the axial direction of the base 41, two second regions 41d are provided on both sides of the first region 41c, respectively.

In some examples, the aperture of the vent 411 provided on the first region 41c is greater than the aperture of the vent 411 provided on the second region 41 d. The larger the aperture of the vent 411 is, the larger the ventilation amount per unit time of the vent 411 is.

The suction air flow pressure outputted from the air outlet 100a of the first air flow passage 100 is relatively large. The relatively large aperture of the vent 411 provided in the first region 41c facilitates rapid and smooth discharge of the suction airflow through the vent 411. The resistance of the suction air flow outputted from the vent 411 of the second region 41d against the suction air flow outputted from the vent 411 of the first region 41c is relatively small, so that the suction air flow outputted from the vent 411 of the first region 41c can smoothly flow to the air outlet 300a of the third air flow path 300.

In some examples, a plurality of vent holes 411 are provided proximate to the second region 41d of the first end 41 a. A plurality of ventilation holes 411 are provided near the second region 41d of the second end portion 41 b. The total area of the openings of the plurality of ventilation holes 411 of the second region 41d near the first end 41a is S1, and the total area of the openings of the plurality of ventilation holes 411 of the second region 41d near the second end 41b is S2, where S2 is equal to or less than S1.

In an embodiment of the present application, fig. 12 schematically shows a partially cut-away configuration of the motor assembly 10. Referring to fig. 12, the motor housing 30 may further include a first air inlet 30a. The first air flow channel 100 communicates with the first air intake port 30a. The suction airstream may enter the first airstream channel 100 from the first air inlet opening 30a. The outlet portion 300a of the third airflow channel 300 is disposed adjacent to the first air inlet 30a. The air outlet 300a of the third air flow path 300 is spaced apart from the first air inlet 30a in the radial direction of the base 41. The radial direction of the base 41 is perpendicular to the axial direction of the base 41. The air outlet 300a of the third air flow channel 300 is isolated from the first air inlet 30a, i.e. the air outlet 300a of the third air flow channel 300 is not communicated with the first air inlet 30a. Since the suction airflow enters the motor assembly 10 from the first air inlet 30a, then flows through the first airflow channel 100 and the third airflow channel 300, and finally exits the motor assembly 10 from the air outlet 300a of the third airflow channel 300, the air outlet 300a of the third airflow channel 300 is close to the first air inlet 30a, so that the flow path of the suction airflow can be effectively prolonged, and the noise reduction cover 40 can effectively disturb the suction airflow.

In some implementations, referring to fig. 12, the motor housing 30 may also include a cover member 60. The cover member 60 is connected to the first housing 31. The cover member 60 covers the opening of the accommodating chamber 400. The cover member 60 includes a ventilation inlet 60a and a ventilation outlet 60b. The first air inlet 30a and the ventilation inlet 60a are disposed opposite to each other in the axial direction of the base 41. The ventilation inlet 60a and the ventilation outlet 60b are both in communication with the receiving chamber 400. When the motor assembly 10 is in a working state, air flow entering from the ventilation inlet 60a can enter the accommodating cavity 400, and then the air flow takes away heat generated by the motor body 20 and is discharged from the ventilation outlet 60b, so that the motor body 20 is cooled, and the situation that the normal working of the motor body 20 is influenced due to overhigh temperature rise of the motor body 20 is effectively avoided.

In some implementations, referring to fig. 12, the motor assembly 10 may also include a shock absorbing member 50. A damper member 50 is provided between the base 41 and the motor housing 30. The shock absorbing member 50 can absorb shock effectively when the motor assembly 10 is in operation, which is advantageous in reducing the possibility of noise generated by vibration of the base 41 as a whole. In some examples, the shock absorbing member 50 may be an elastic structure. The material of the shock absorbing member 50 may be, but is not limited to, rubber or silica gel. In some examples, the shock absorbing member 50 may be snapped or glued to the motor housing 30. The shock absorbing member 50 may be engaged with or bonded to the base 41.

In the embodiment of the application, the silencing cover 40 can be in an integrally formed structure, which is beneficial to improving the integral mechanical strength of the silencing cover 40, so that the silencing cover 40 is not easy to vibrate under the impact of suction airflow, the possibility of vibration noise generated by the vibration of the silencing cover 40 is reduced, and the noise generated by the flow of the suction airflow is reduced. In some embodiments, the material of the base 41 and the material of the wall 42 are both plastic. The muffler cover 40 of an integrally formed structure may be formed by an injection molding process.

In some realizable forms, fig. 13 schematically shows a partial structure of the muffler cover 40. Fig. 14 is a cross-sectional view taken along the W-W direction in fig. 13. Referring to fig. 13 and 14, the wall 42 includes a plurality of first sub-walls 42a and a plurality of second sub-walls 42b. The extension length H1 of the first sub-wall 42a is greater than the extension length H2 of the second sub-wall 42b in the radial direction of the base 41. The extension length of the first sub-wall 42a and the extension length of the second sub-wall 42b refer to the dimensions of the surface of the first sub-wall 42a and the second sub-wall 42b protruding from the base 41 in the radial direction of the base 41. The first sub-wall 42a and the second sub-wall 42b are different in respective extension lengths, so that the wall 42 forms a recess at a position corresponding to the second sub-wall 42b. In some examples, the suction airflow may flow in the recess of the wall 42, such that the recess of the wall 42 and the third airflow channel 300 may together disturb the suction airflow to facilitate further enhancing the turbulence effect of the muffler 40 on the suction airflow.

In some possible ways, referring to fig. 14, the side of the base 41 facing the motor housing is provided with a second air flow channel 200. The first air flow channel 100, the second air flow channel 200 and the third air flow channel 300 are in communication. In the radial direction of the base 41, the maximum depth of the third air flow channel 300 is A, and the maximum depth of the second air flow channel 200 is B, wherein B/3.ltoreq.A.ltoreq.B. In the case where the maximum depth of the third air flow channel 300 is smaller than B/3, the depth of the third air flow channel 300 itself is relatively small, and the maximum extension length of the wall 42 in the radial direction of the base 41 is small, so that the turbulence effect of the muffler cover 40 on the suction air flow is relatively deviated, which is not beneficial to reducing noise generated when the suction air flow is sucked. In the case that the maximum depth of the third airflow channel 300 is greater than B, the depth of the third airflow channel 300 is relatively greater, and the maximum extension length of the wall body 42 along the radial direction of the base 41 is greater, so that the size of the silencing cover 40 in the radial direction of the base 41 is greater, and therefore, in the case that the silencing cover 40 is applied to a cleaning device, the silencing cover 40 occupies a greater installation space, which is not beneficial to compact design of the cleaning device.

In some realizable forms, fig. 15 schematically shows a partial cross-sectional structure of the sound attenuating cap 40. Referring to fig. 15, the base 41 is provided with a wall 42 facing the inner surface (i.e., the second base surface) of the motor housing 30. The third air flow passage 300 is located on the inner side of the base 41 facing the motor housing 30. The first air flow channel 100 communicates with the third air flow channel 300. The suction air flow discharged from the air outlet 100a of the first air flow passage 100 may enter the third air flow passage 300. The third air flow channel 300 may form turbulence to the suction air flow to facilitate reducing noise generated when the suction air flow is sucked. In some examples, a vent 411 is provided on the base 41 corresponding to the third airflow channel 300. The suction air flow subjected to the turbulence processing through the third air flow passage 300 may be discharged to the outside of the muffler cover 40 through the air vent 411.

In some implementations, the outer surface (i.e., the first base surface) and the inner surface (i.e., the second base surface) of the base 41 may each be provided with a wall 42. The third air flow channel 300 may be provided on both the outer side and the inner side of the base 41 in the radial direction of the base 41.

The embodiment of the application also provides a cleaning device. Fig. 16 schematically shows a partially cut-away structure of the cleaning device. Referring to fig. 16, the cleaning apparatus may include a motor cover 500. The muffler cover 40 is provided in the motor cover 500. The motor cover 500 further includes a second air inlet 500a and a main air outlet 500b. The second air inlet 500a communicates with the first air flow channel 100. The third air flow passage 300 communicates with the main air outlet 500b. The suction air flow may enter the first air flow channel 100 and the third air flow channel 300 through the second air intake 500 a. The suction air flowing through the first air flow channel 100 and the third air flow channel 300 may finally enter the main air outlet 500b and be discharged from the main air outlet 500b to the external environment.

In some embodiments, the air flow drawn from the second air intake 500a and the first air intake 30a of the motor housing 30 may enter the first air flow channel 100. The air flow is guided out along the first direction Z1 after passing through the air outlet 100a of the first air flow channel 100. The first direction Z1 is the same as the axial direction of the base 41.

In some embodiments, the primary air outlet 500b of the motor cover 500 is disposed proximate to the secondary air inlet 500 a. In some examples, the suction airflow in the second air inlet 500a may flow in a direction opposite to that of the suction airflow discharged from the main air outlet 500 b. In some examples, the primary air outlet 500b and the secondary air inlet 500a of the motor cover 500 may be disposed on the same side of the motor assembly 10 along the axial direction of the base 41.

In some embodiments, the first air inlet 30a of the motor housing 30 is disposed corresponding to the second air inlet 500a of the motor cover 500 along the axial direction of the base 41.

In some embodiments, the substrate 41 includes a first base surface and a second base surface. The first base surface faces the motor cover 500. The second base surface faces away from the motor can 500. The base 41 is provided with the wall bodies 42 facing the first base surface of the motor cover 500, and at least a part of the number of wall bodies 42 may abut against the inner wall of the motor cover 500. The motor cover 500 shields the third airflow channel 300. The wall body 42 of the noise reduction cover 40 is abutted against the inner wall of the motor cover 500, so that on one hand, the motor cover 500 can provide support for the noise reduction cover 40 to facilitate fixing the position of the noise reduction cover 40 and reduce the possibility of vibration noise generated by unstable position of the noise reduction cover 40, and on the other hand, the contact area between the wall body 42 of the noise reduction cover 40 and the inner wall of the motor cover 500 can be increased to increase the heat dissipation area between the noise reduction cover 40 and the motor cover 500 and facilitate improving the heat dissipation efficiency of heat dissipation through the motor cover 500.

In some examples, the base 41 includes a first end 41a and a second end 41b disposed opposite each other along an axial direction of the base 41. At least one air inlet is disposed proximate the first end 41 a. The cavity formed between the motor cover 500 and the base 41 communicates with the accommodation space 41aa in the base 41 through the air inlet. The motor cover 500 is hermetically connected to the first end 41 a. The cavity formed between the motor cover 500 and the base 41 communicates with the third air flow passage 300. The air flow guided out in the first direction Z1 through the air outlet 100a of the first air flow channel 100 enters the third air flow channel 300 through the air inlet portion, and is guided out in the second direction Z2 toward the air outlet portion 300a of the third air flow channel 300. The first direction Z1 is opposite to the second direction Z2 along the axial direction of the base 41. Illustratively, the vent 411 provided on the base 41 may serve as an air intake.

In some examples, the wall 42 provided on the base 41 at the exhaust port 100a corresponding to the first air flow channel 100 abuts against the motor cover 500. The impact force of the suction air flow discharged from the air outlet 100a of the first air flow passage 100 on the base 41 is relatively large. If the region of the base 41 corresponding to the exhaust port 100a of the first air flow channel 100 is in a suspended state with the motor cover 500, the base 41 itself is prone to generate vibration and vibration noise when the base 41 carries a relatively large impact force. The wall body 42 disposed at the position of the base 41 corresponding to the air outlet 100a of the first air flow channel 100 is in contact with the motor cover 500, so that the motor cover 500 is beneficial to support the region of the base 41 corresponding to the air outlet 100a of the first air flow channel 100, so as to effectively solve the above-mentioned problems.

Illustratively, the substrate 41 has a first region 41c and a second region 41d. The first region 41c is disposed corresponding to the exhaust port 100a of the first air flow passage 100. The first region 41c is provided with a wall 42. The wall 42 provided in the first region 41c abuts against the motor cover 500. Illustratively, both the first region 41c and the second region 41d are provided with a wall 42.

In some embodiments, the wall 42 includes a plurality of first sub-walls 42a and a plurality of second sub-walls 42b. The first sub-wall 42a has an extension length greater than that of the second sub-wall 42b in the radial direction of the base 41. The first sub-wall 42a may abut against the motor cover 500. A space is provided between the second sub-wall 42b and the motor housing 500 to form a through-flow passage so that the suction air flow can flow from between the second sub-wall 42b and the motor housing 500 to enhance a disturbance effect of the suction air flow.

In some embodiments, the cleaning device may be a handheld device. For example, the cleaning device may be a hand-held cleaner or a floor scrubber. The main air outlet 500b of the motor cover 500 is disposed opposite to the user, so that the suction air flow discharged from the main air outlet 500b of the motor cover 500 is not blown to the user, and the use experience is improved.

In some embodiments, fig. 17 schematically shows a partial cross-sectional structure of a cleaning device. Referring to fig. 17, the cleaning device further includes a shock absorbing structure 600. A shock absorbing structure 600 is provided between the wall 42 and the motor housing 500. At least a portion of the number of walls 42 abut the shock absorbing structure 600. The wall 42 and motor cover 500 co-extrude the shock absorbing structure 600. When the motor assembly 10 is in an operating state, the shock absorbing member 50 can effectively absorb shock, which is beneficial to reducing the possibility of noise generated by the vibration generated by the whole noise reduction cover 40.

In some examples, shock absorbing structure 600 may be a flexible structure. The shock absorbing structure 600 is prone to compression deformation and accumulation of elastic potential energy when subjected to compressive forces. In some examples, the material of shock absorbing structure 600 may be, but is not limited to, rubber or silicone.

In some examples, the shock absorbing structure 600 may be a cylindrical structure. The shock absorbing structure 600 may be attached to the inner wall of the motor housing 500. For example, the shock absorbing structure 600 may be bonded to the inner wall of the motor housing 500. The sound deadening cap 40 may be provided inside the shock absorbing structure 600, and the sound deadening cap 40 may press the shock absorbing structure 600.

In some embodiments, fig. 18 schematically shows a partial cross-sectional structure of a cleaning device. Referring to fig. 18, the inner surface of the base 41 facing away from the motor cover 500 is provided with a wall 42. At least a portion of the number of walls 42 abut the motor housing 30. The motor housing 30 may provide support for the noise-reducing cover 40 to facilitate fixing the position of the noise-reducing cover 40 and reduce the possibility of vibration noise due to unstable position of the noise-reducing cover 40, and may increase the contact area between the wall 42 and the motor housing 30 to increase the heat dissipation area between the noise-reducing cover 40 and the motor housing 30 to facilitate improving the heat dissipation efficiency of heat dissipation through the motor housing 30 and the noise-reducing cover 40.

In some examples, the wall 42 includes a plurality of first sub-walls 42a and a plurality of second sub-walls 42b. The first sub-wall 42a has an extension length greater than that of the second sub-wall 42b in the radial direction of the base 41. A part of the first sub-walls 42a abut against the motor housing 30.

In some realizable forms, fig. 19 schematically shows a partial cross-sectional structure of the cleaning device. Referring to fig. 19, in the radial direction of the base 41, a first base surface (outer surface) of the base 41 and the motor cover 500 have a distance L1 therebetween. The third air flow path 300 has a width W1 (see fig. 5). The third air flow path 300 has an extension H. Wherein W1 is greater than or equal to 5mm and L1/2 is greater than or equal to H/4 is greater than or equal to 20 mm, and W1 decreases as L1 becomes greater in the first direction Z1.

In some implementations, referring to fig. 19, the rotor 22 of the motor body 20 includes an output shaft. The impeller 23 is connected to the output shaft of the rotor 22. The base 41 is a rotation body provided on the axis of the output shaft. Illustratively, the base 41 is frustoconical. Along the radial direction of the base 41, the first base surface (outer surface) of the base 41 has a distance L1 from the motor cover 500, and the top surface of the wall 42 has a distance L2 from the motor cover 500. Fig. 19 shows a partial structure of a longitudinal section of the cleaning device taken along the axis of the base 41. In the longitudinal section of the motor cover 500 and the base 41, the angle between the first base surface (outer surface) of the base 41 and the inner wall of the motor cover 500 is α, and the angle between the top surface of the wall 42 and the inner wall of the motor cover 500 is β. Wherein, 45 degrees or more and alpha or more 2 beta is more than or equal to 20 degrees.

In some examples, both L1 and L2 may be gradually increased along the first direction Z1. Or in other examples, both L1 and L2 may taper along the first direction Z1.

In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The embodiments of the application are not intended to be limited to the specific orientations or configurations and operations of the device or element in question. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, system, article, or apparatus.

The term "plurality" herein refers to two or more. The term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean that a exists alone, while a and B exist together, and B exists alone. In the formula, the character "/", indicates that the front and rear associated objects are a "division" relationship.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiment of the present application, the sequence number of each process does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.

Claims

1. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

The silencing cover comprises a cylindrical base body with a containing space, wherein the base body is provided with a plurality of wall bodies, and the wall bodies protrude out of the surface of the base body;

The base body is sleeved on the periphery of the motor shell through the accommodating space, and the exhaust port is communicated with the accommodating space;

A third airflow channel is formed between the adjacent wall bodies, the first airflow channel is communicated with the third airflow channel, the third airflow channel is provided with an air inlet part, an air outlet part and at least two sub airflow channels which are arranged between the air inlet part and the air outlet part and are communicated with each other, the extending directions of the adjacent sub airflow channels are different, at least one sub airflow channel extends along the circumferential direction of the basal body, and the airflow exhausted from the exhaust port sequentially passes through the accommodating space and the air inlet part and then enters into the plurality of sub airflow channels, and is guided out by the air outlet part.

2. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

a third airflow channel is formed between adjacent wall bodies, the first airflow channel and the third airflow channel are communicated with each other, the third airflow channel is provided with an air inlet part, an air outlet part and at least two sub airflow channels which are arranged between the air inlet part and the air outlet part and are communicated with each other, the respective extending directions of the adjacent sub airflow channels are different, at least one sub airflow channel extends along the circumferential direction of the basal body, and the airflow discharged from the exhaust port sequentially passes through the accommodating space and the air inlet part, then enters into the plurality of sub airflow channels and is guided out by the air outlet part;

The number of the third air flow channels is more than two, and at least two third air flow channels are mutually communicated.

3. The motor assembly of claim 2, wherein at least one of the walls is provided with a communication passage through which adjacent two of the third air flow passages communicate.

4. A motor assembly according to claim 3, wherein all of the walls are provided with the communication channels, each of the communication channels being offset.

5. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

A third air flow channel is formed between the adjacent wall bodies, the first air flow channel and the third air flow channel are communicated with each other, the third air flow channel is provided with an air inlet part, an air outlet part and at least two sub air flow channels which are arranged between the air inlet part and the air outlet part and are communicated with each other, the respective extending directions of the adjacent sub air flow channels are different, and the air flow discharged from the air outlet enters the plurality of sub air flow channels after sequentially passing through the accommodating space and the air inlet part and is led out by the air outlet part;

In the third air flow channel, one extending direction of any two adjacent sub air flow channels is the same as the axial direction of the base body, and the other extending direction is the same as the circumferential direction of the base body.

6. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

A third airflow channel is formed between the adjacent wall bodies, the first airflow channel is communicated with the third airflow channel, the third airflow channel is provided with an air inlet part, an air outlet part and at least two sub airflow channels which are communicated with each other between the air inlet part and the air outlet part, the extending directions of the adjacent sub airflow channels are different, each sub airflow channel extends along the axial spiral of the substrate, and the airflow exhausted from the exhaust port sequentially passes through the accommodating space and the air inlet part and then enters into the sub airflow channels and is led out by the air outlet part.

7. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

A third airflow channel is formed between the adjacent wall bodies, the first airflow channel is communicated with the third airflow channel, the third airflow channel is provided with an air inlet part, an air outlet part and at least two sub airflow channels which are arranged between the air inlet part and the air outlet part and are communicated with each other, the extending directions of the adjacent sub airflow channels are different, at least one sub airflow channel extends along the circumferential direction of the substrate, and airflow discharged from the exhaust port sequentially passes through the accommodating space and the air inlet part and then enters into the sub airflow channels and is led out by the air outlet part, and the extending lengths of the sub airflow channels are different.

8. The motor assembly of claim 7, wherein the third airflow channel is located on an outer side of the base body facing away from the motor housing, and wherein the sub-airflow channels proximate the air outlet have an extension greater than an extension of the sub-airflow channels distal the air outlet.

9. An electric motor assembly, comprising:

a motor housing including a first airflow passage having an exhaust port;

the silencing cover is of an integrated structure.

10. The motor assembly of claim 1, 2, 5, 6, 7, or 9, wherein the first airflow channel causes airflow in a first direction within the receiving space after passing through the exhaust port;

The base body comprises a first base surface and a second base surface, the first base surface faces away from the motor shell, the second base surface faces towards the motor shell, at least part of the wall body is arranged on the first base surface so as to form a third air flow channel on the first base surface, at least one air inlet part is communicated with the accommodating space and the third air flow channel on the first base surface, and a plurality of sub-air flow channels form the third air flow channel;

The air flow is guided out of the air outlet part along a second direction after passing through the air inlet part, wherein the first direction is opposite to the second direction along the axial direction of the substrate.

11. The motor assembly of claim 10, wherein there is an axial spacing between the air inlet and the air outlet in an axial direction of the base.

12. The motor assembly of claim 11, wherein at least one of the inlet portion and one of the outlet portions are disposed at both ends of the base body, respectively, in an axial direction of the base body.

13. The motor assembly of claim 11, wherein the vent has an orthographic projection on the second base surface of the base in a radial direction of the base, and wherein the orthographic projection of the vent on the second base surface is located between the inlet portion and the outlet portion in an axial direction of the base.

14. The motor assembly of claim 10, wherein the air inlet includes a vent hole extending radially through the base.

15. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein the base body includes a first end portion and a second end portion disposed opposite to each other in an axial direction of the base body, the air outlet portion is disposed at the second end portion, and the base body includes a vent hole that communicates the first air flow passage and the third air flow passage.

16. The motor assembly of claim 15, wherein the base has a first region and two second regions, one of the second regions being disposed on each side of the first region in an axial direction of the base, the first region being disposed corresponding to the exhaust port of the first air flow passage.

17. The motor assembly of claim 16, wherein the vent holes provided in the first region have a larger pore size than the vent holes provided in the second region.

18. The motor assembly of claim 16, wherein a total area of openings of the plurality of vent holes of the second region proximate the first end is S1 and a total area of openings of the plurality of vent holes of the second region proximate the second end is S2, wherein S2 is ∈s1.

19. The motor assembly according to claim 1,2, 7 or 9, wherein in the third air flow passage, at least one of the sub-air flow passages extends in the same direction as the axial direction of the base body.

20. The motor assembly according to claim 1,2, 7 or 9, wherein in the third air flow passage, at least one of the sub air flow passages extends in a direction different from a circumferential direction of the base body.

21. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein the base comprises a first base surface facing away from the motor housing and a second base surface facing toward the motor housing, the second base surface being provided with the wall, the base surface facing toward the inside of the motor housing being provided with the third air flow passage, or

The base body comprises a first base surface and a second base surface, the first base surface faces away from the motor shell, the second base surface faces towards the motor shell, the first base surface and the second base surface are both provided with the wall body, and the base body faces away from the outer side of the motor shell and the base body faces towards the inner side of the motor shell and is provided with the third airflow channel.

22. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein the wall includes a plurality of first sub-walls and a plurality of second sub-walls, the first sub-walls having an extension greater than an extension of the second sub-walls in a radial direction of the base.

23. The motor assembly of claim 1, 2, 5, 6, 7 or 9, further comprising a motor body, the motor housing being nested on the motor body, the motor housing comprising a first housing and a second housing, the second housing being nested outside the first housing, the first housing and the second housing defining the first air flow path therebetween, the first housing having a receiving chamber, the motor body being coupled to the first housing.

24. The motor assembly of claim 23, wherein the first housing has a boss disposed facing the exhaust port of the first airflow passage with a space therebetween.

25. The motor assembly of claim 23, wherein the motor body includes a rotor and a stator, the stator and at least a portion of the rotor being disposed within the receiving chamber, the stator being in contact with an inner wall of the first housing, the portion of the first housing on which the stator is mounted disposed proximate the exhaust port of the first airflow passage.

26. The motor assembly of claim 25, further comprising a wind scooper disposed at one end of the second housing, the wind scooper having a first air inlet, the first air flow channel in communication with the first air inlet;

The motor body further comprises a movable impeller, the movable impeller is arranged in the air guide cover, the rotor penetrates out of the first shell, the movable impeller is connected to the rotor, and the rotor is used for driving the movable impeller to rotate, so that air flow is led into the first air flow channel after passing through the first air inlet.

27. The motor assembly of claim 26, wherein the motor housing further comprises a stator wheel comprising a wheel body and a plurality of blades, the wheel body being disposed between the first housing and the rotor wheel in an axial direction of the rotor, the wheel body being coaxial with the rotor wheel and the wheel body being fixedly connected with the first housing, the plurality of blades being disposed between the wheel body and the second housing at intervals along a circumferential direction of the wheel body, wherein an air duct is provided between adjacent blades, the air duct being in communication with the first air flow channel and the first air inlet such that an air flow drawn by the rotor wheel enters from the first air inlet, flows through the air duct, and is discharged from the air outlet of the first air flow channel.

28. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein a second airflow channel is provided on a side of the base body facing the motor housing, the first airflow channel, the second airflow channel and the third airflow channel are communicated, a maximum depth of the third airflow channel is a along a radial direction of the base body, and a maximum depth of the second airflow channel is B, wherein B/3 is equal to or less than a is equal to or less than B.

29. A cleaning device, comprising:

a motor assembly as claimed in any one of claims 1 to 28;

The motor cover, the motor assembly set up in the motor cover, the motor cover includes second air intake and main air outlet, the second air intake with first air current passageway is linked together, third air current passageway's portion of giving vent to anger with main air outlet is linked together.

30. The cleaning apparatus defined in claim 29, wherein the air flow is directed through the exhaust port in a first direction that is the same as an axial direction of the substrate.

31. The cleaning device of claim 30, wherein the base includes a first base surface facing the motor housing and a second base surface facing away from the motor housing, the first base surface being provided with the walls, and at least a portion of the walls abutting the motor housing, the base including first and second ends disposed opposite each other in an axial direction of the base, at least one of the air inlets being disposed adjacent the first end, a cavity formed between the motor housing and the base being in communication with the accommodation space in the base through the air inlet, the motor housing being in sealing connection with the first end, air flow directed in the first direction through the air inlet after passing through the air outlet being directed in the third air flow path and directed in a second direction toward the air outlet, wherein the first direction is opposite the second direction.

32. The cleaning apparatus defined in claim 29, wherein the base and the motor housing are spaced apart by a distance L1 in a radial direction of the base;

The width of the third air flow channel is W1, the extension length of the third air flow channel is H, and when W1 is more than or equal to 5mm and less than or equal to 1/2 xL1 is more than or equal to 1/4 xH is more than or equal to 20mm, and along the first direction, W1 is reduced when L1 is enlarged.

33. The cleaning apparatus of claim 29, wherein a distance L1 is provided between the base and the motor housing in a radial direction of the base, a distance L2 is provided between a top surface of the wall and the motor housing, an angle α between an outer surface of the base and an inner wall of the motor housing in a longitudinal section of the motor housing and the base taken along an axis of the base, and an angle β between a top surface of the wall and the inner wall of the motor housing, wherein 45 ° is equal to or greater than or equal to 2 β is equal to or greater than 20 °, and the L1 and the L2 are both gradually increased or both gradually decreased in a first direction.