Motor assembly and cleaning device

Abstract

The embodiment of the utility model provides a motor assembly and a cleaning device. The motor assembly comprises a motor shell and a silencing cover. The motor housing includes a first airflow channel 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 arranged on the periphery of the motor shell in a sleeving mode through the containing space. The exhaust port is communicated with the containing space. A third airflow channel is formed between every two adjacent wall bodies. And 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 communicate with each other. And the extending directions of the adjacent sub-airflow channels are different. The at least one sub-airflow channel extends in the circumferential direction of the base body. Air flow exhausted from the exhaust port sequentially passes through the containing space and the air inlet part, then enters the multiple sub-air-flow channels and is guided out through the air outlet part. According to the motor assembly provided by the embodiment of the invention, the noise generated by the motor assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a motor assembly and a cleaning device. Background Art

[0002] In people's daily lives, smart home appliances such as sweepers, vacuum cleaners, and floor scrubbers are widely used. Smart home appliances such as sweepers, vacuum cleaners, and floor scrubbers include motors as suction sources. The motor needs to perform the function of sucking air to suck dust and other debris into the dust removal channel of the smart home appliance. The motors of smart home appliances such as sweepers, vacuum cleaners, and floor scrubbers generate noise during operation. When the motor noise is too loud, users will be affected by the noise and the user experience will be deviated.

[0003] Chinese patent CN219145166U discloses a motor silencer structure. The motor silencer structure includes a silencer shell and a silencer body. The silencer shell includes an outer cover body, an inner cover body, an end plate and an inner spacer ring that are assembled and connected to each other. The inner cover body is coaxially and arranged on the inner side of the outer cover body in the same direction. The end plate is arranged on the opening side of the outer cover body. An inner spacer ring is arranged on the end plate facing the inner cavity of the inner cover body. The inner spacer ring is coaxially arranged with the inner cover body. The inner spacer rings of the outer cover body and the inner cover body are arranged at intervals from each other in the radial direction and form an S-shaped silencer channel. The motor silencer structure disturbs the incoming air flow in the radial direction of the silencer shell. Although the incoming air flow can change the flow direction in the radial direction of the silencer shell and has a certain noise reduction effect on the incoming air flow, this silencer structure at the air inlet position will greatly affect the air inlet efficiency of the motor, and cannot generate a large negative pressure at the position of the motor impeller, and cannot be sucked by negative pressure. In addition, the outer cover body, inner cover body, end plate and inner spacer ring of this silencer structure are mutually arranged to form an air flow channel, resulting in the outer cover body, inner cover body, end plate and inner spacer ring forming a multi-layer noise reduction structure in the radial direction of the silencer shell, which makes the overall size of the silencer shell larger and occupies a larger volume, which is not conducive to the miniaturization design of the motor assembly.

[0004] Chinese patent CN219835557U discloses a self-moving device. The self-moving device includes a noise reduction structure. The noise reduction structure includes a shell, a first guide body and a second guide body that are assembled and connected to each other. The first guide body and the second guide body are arranged in the shell. The shell, the first guide body and the second guide body are enclosed to form a first air duct, a second air duct, a third air duct, a fourth air duct and a fifth air duct. The suction airflow flows through the first air duct to the fifth air duct in sequence and is discharged. The noise reduction structure disturbs the suction airflow in the radial direction of the shell, so that the suction airflow can change its flow direction in the radial direction of the shell to reduce the noise generated by the suction airflow. However, the shell, the first guide body and the second guide body are mutually arranged to form an airflow channel, resulting in the shell, the first guide body and the second guide body forming a multi-layer noise reduction shell structure in the radial direction of the silencer shell, which makes the overall size of the noise reduction larger and occupies a larger volume, which is not conducive to the miniaturization design of the motor assembly. Utility Model Content

[0005] The embodiments of the present application provide a motor assembly and a cleaning device, which are helpful in reducing the noise generated by the motor assembly.

[0006] A first aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0007] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The silencer includes a cylindrical base having an accommodating space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodating space. The exhaust port is connected to the accommodating space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are connected to each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are connected to each other and are arranged between the air inlet and the air outlet. The extension directions of adjacent sub-airflow channels are different. At least one sub-airflow channel extends along the circumference of the base. The airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence and then enters into the plurality of sub-airflow channels, and is discharged from the air outlet.

[0008] As mentioned in the background technology, although the inlet airflow can change its flow direction in the radial direction of the muffler housing, and has a certain noise reduction effect on the inlet airflow, the muffler structure at the air inlet position will greatly affect the motor air intake efficiency, and it is impossible to generate a large negative pressure at the motor impeller position, and it is even more impossible to perform suction through negative pressure. The motor assembly of the embodiment of the present application can be applied to cleaning devices such as sweepers, vacuum cleaners or floor scrubbers. The motor assembly in the working state can suck air from the outside of the cleaning device and form a suction airflow flowing inside the cleaning device. Dust and other dirt at the area to be cleaned can follow the suction airflow into the cleaning device and be collected by the cleaning device. The motor assembly of the embodiment of the present application may include a motor housing and a muffler cover. The motor housing includes a first airflow channel. A plurality of wall bodies are arranged on the base of the muffler cover. A third airflow channel can be formed between adjacent wall bodies. The first airflow channel is connected to the third airflow channel. The third airflow channel includes at least two interconnected sub-airflow channels. At least one sub-airflow channel extends along the circumference of the base. The third airflow channel itself has a relatively long extension length as a whole, and the third airflow channel has sub-airflow channels with different extension directions that can be used to change the flow direction of the suction airflow, so that the suction airflow changes its flow direction multiple times in the axial direction of the base, so that the silencer is conducive to effective axial turbulence of the suction airflow. Therefore, the silencer of the embodiment of the present application can effectively turbulent the suction airflow in the axial direction of the base, which is conducive to reducing the noise generated when the suction airflow flows. At the same time, since the silencer used in the silencer structure of the embodiment of the present application is a single-layer shell structure, there is no need to set a multi-layer silencer on the outside of the motor housing to achieve a better noise reduction effect. Compared with the prior art, the radial size of the silencer structure in the motor housing can be effectively reduced, which is conducive to the miniaturized design of the silencer, and then to the miniaturized design of the motor assembly.

[0009] A second aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0010] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The muffler includes a cylindrical base having an accommodating space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodating space. The exhaust port is communicated with the accommodating space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are communicated with each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are arranged between the air inlet and the air outlet and are communicated with each other. The extension directions of adjacent sub-airflow channels are different. At least one sub-airflow channel extends along the circumference of the base. The airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence, enters into the plurality of sub-airflow channels, and is led out by the air outlet. The number of the third airflow channels is more than two. At least two third airflow channels are communicated with each other.

[0011] The suction airflow flowing in one third airflow channel can partially flow into another third airflow channel, so that the suction airflows in the two third airflow channels can be mixed and crosstalked, which is beneficial to enhance the turbulence effect of the silencer on the suction airflow and further reduce the noise generated by the suction airflow.

[0012] In some achievable embodiments, at least one wall is provided with a communication channel, and two adjacent third air flow channels are connected via the communication channel.

[0013] In some feasible ways, all walls are provided with connecting channels. The connecting channels are staggered. The third airflow channels can achieve more times of mixing and crosstalk through the connecting channels at different positions, so as to further enhance the disturbing effect of the muffler on the suction airflow.

[0014] A third aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0015] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The muffler includes a cylindrical base having an accommodation space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodation space. The exhaust port is communicated with the accommodation space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are communicated with each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are arranged between the air inlet and the air outlet and are communicated with each other. The extension directions of adjacent sub-airflow channels are different. At least one sub-airflow channel extends along the circumference of the base. The airflow discharged from the exhaust port passes through the accommodation space and the air inlet in sequence and then enters into the plurality of sub-airflow channels, and is led out by the air outlet. In the third airflow channel, the extension direction of any two adjacent sub-airflow channels is the same as the axial direction of the base, and the extension direction of the other is the same as the circumference of the base.

[0016] After the suction airflow flowing through the sub-airflow channel whose extension direction is the same as the axial direction of the base body enters the sub-airflow channel whose extension direction is the same as the circumferential direction of the base body, the flow direction of the suction airflow is bent greatly, so that the flow direction of the suction airflow can be changed to a large extent, so as to effectively turbulent the suction airflow.

[0017] A fourth aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0018] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The silencer includes a cylindrical base having an accommodating space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodating space. The exhaust port is connected to the accommodating space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are connected to each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are connected to each other and are arranged between the air inlet and the air outlet. The extension directions of adjacent sub-airflow channels are different. Each sub-airflow channel extends in an axial spiral along the base. The airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence and then enters into the plurality of sub-airflow channels, and is discharged from the air outlet.

[0019] A fifth aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0020] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The muffler includes a cylindrical base having an accommodating space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodating space. The exhaust port is connected to the accommodating space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are connected to each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are connected to each other and are arranged between the air inlet and the air outlet. The extension directions of adjacent sub-airflow channels are different. At least one sub-airflow channel extends along the circumference of the base. The airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence and then enters the plurality of sub-airflow channels, and is led out by the air outlet. The extension lengths of at least two sub-airflow channels are different.

[0021] In some achievable embodiments, the third airflow channel is located on the outer side of the base body facing away from the motor housing, and an extension length of the sub-airflow channel close to the air outlet is greater than an extension length of the sub-airflow channel away from the air outlet.

[0022] The relatively short extension length of the sub-airflow channel away from the air outlet can make the suction airflow entering the third airflow channel change its flow direction relatively more times within a short flow distance, which is conducive to disturbing the suction airflow. The relatively long extension length of the sub-airflow channel close to the air outlet can help reduce the flow resistance of the suction airflow.

[0023] A sixth aspect of an embodiment of the present application provides a motor assembly, which includes a motor housing and a silencer cover.

[0024] The motor housing includes a first airflow channel. The first airflow channel has an exhaust port. The silencer includes a cylindrical base having an accommodation space. The base is provided with a plurality of wall bodies. The wall bodies protrude from the surface of the base. The base is sleeved on the outer periphery of the motor housing through the accommodation space. The exhaust port is connected to the accommodation space. A third airflow channel is formed between adjacent walls. The first airflow channel and the third airflow channel are connected to each other. The third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are connected to each other and are arranged between the air inlet and the air outlet. The extension directions of adjacent sub-airflow channels are different. At least one sub-airflow channel extends along the circumference of the base. The airflow discharged from the exhaust port passes through the accommodation space and the air inlet in sequence and then enters into the plurality of sub-airflow channels, and is led out by the air outlet. The silencer is an integrally formed structure.

[0025] The silencer hood can be an integrally formed structure, which is beneficial to improving the overall mechanical strength of the silencer hood, so that the silencer hood is not easy to vibrate under the impact of the suction airflow, which is beneficial to reducing the possibility of vibration noise caused by the vibration of the silencer hood itself, and further helps to reduce the noise generated by the flow of the suction airflow.

[0026] In some achievable embodiments, the first airflow channel allows the airflow to flow in the first direction within the accommodation space after passing through the exhaust port. 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 is arranged on the first base surface to form a third airflow channel on the first base surface. At least one air inlet portion connects the accommodation space and the third airflow channel on the first base surface. A plurality of sub-airflow channels form the third airflow channel. After passing through the air inlet portion, the airflow is guided out by the air outlet portion along the second direction, wherein, along the axial direction of the substrate, the first direction is opposite to the second direction.

[0027] In some achievable embodiments, in the axial direction of the base body, there is an axial spacing between the air inlet portion and the air outlet.

[0028] In some achievable embodiments, in the axial direction of the base, at least one air inlet and one air outlet are respectively disposed at two ends of the base.

[0029] In some achievable embodiments, along the radial direction of the substrate, the exhaust port has an orthographic projection on the second base surface of the substrate, and along the axial direction of the substrate, the orthographic projection of the exhaust port on the second base surface is located between the air inlet and the air outlet.

[0030] In some achievable embodiments, the air inlet portion includes air vents that penetrate the substrate in a radial direction.

[0031] In some achievable embodiments, along the axial direction of the base, the base includes a first end and a second end that are oppositely disposed, the air outlet is disposed at the second end, and the base includes an air vent that connects the first airflow channel and the third airflow channel.

[0032] In some achievable embodiments, the substrate has a first region and two second regions, and along the axial direction of the substrate, a second region is respectively arranged on both sides of the first region, and the first region is arranged corresponding to the exhaust port of the first airflow channel.

[0033] In some achievable embodiments, the diameter of the ventilation holes provided in the first region is larger than the diameter of the ventilation holes provided in the second region.

[0034] The air pressure of the suction airflow output from the exhaust port of the first airflow channel is relatively large. The relatively large aperture of the vent holes set on the first area is conducive to the suction airflow being discharged quickly and smoothly through the vent holes. The resistance formed by the suction airflow output from the vent holes in the second area to the suction airflow output from the vent holes in the first area is relatively small, which is conducive to the suction airflow output from the vent holes in the first area flowing smoothly to the air outlet of the third airflow channel.

[0035] In some achievable embodiments, the total opening area of ​​the plurality of vent holes in the second region near the first end is S1, and the total opening area of ​​the plurality of vent holes in the second region near the second end is S2, wherein S2≤S1.

[0036] In some achievable embodiments, in the third air flow channel, an extension direction of at least one sub-air flow channel is the same as the axial direction of the base.

[0037] In some achievable embodiments, in the third air flow channel, an extension direction of at least one sub-air flow channel is different from a circumferential direction of the substrate.

[0038] In some achievable embodiments, the base 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, a wall is arranged on the second base surface, and a third airflow channel is arranged on the inner side of the base facing the motor housing.

[0039] In some feasible embodiments, the base includes a first base surface and a second base surface, the first base surface faces away from the motor housing, and the second base surface faces the motor housing, walls are arranged on both the first base surface and the second base surface, and third airflow channels are arranged on the outer side of the base facing away from the motor housing and on the inner side of the base facing the motor housing.

[0040] In some achievable embodiments, the wall body includes a plurality of first sub-wall bodies and a plurality of second sub-wall bodies, and along the radial direction of the base body, an extension length of the first sub-wall body is greater than an extension length of the second sub-wall body.

[0041] In some feasible embodiments, the motor assembly also 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 outside of the first housing, a first air flow channel is formed between the first housing and the second housing, the first housing has a accommodating chamber, and the motor body is connected to the first housing.

[0042] The motor body is arranged in the first housing so that the heat generated by the motor body during operation can be conducted to the first housing and dissipated through the first housing. The outer surface of the first housing faces the first airflow channel, so the airflow flowing in the first airflow channel can quickly take away the heat on the first housing, so as to effectively cool the first housing and the motor body, and ensure that the motor body achieves good heat dissipation.

[0043] In some achievable embodiments, the first shell has a boss, the boss is arranged facing the exhaust port of the first airflow channel, and there is a distance between the boss and the exhaust port of the first airflow channel.

[0044] The boss provided on the first housing can change the flow area of ​​the first airflow channel, and the boss can effectively disturb the airflow flowing in the first airflow channel, so as to reduce the noise generated by the airflow flowing in the first airflow channel. In addition, the boss can increase the heat dissipation area of ​​the first housing, which is conducive to improving the heat dissipation efficiency of the first housing.

[0045] In some achievable embodiments, the motor body includes a rotor and a stator, the stator and at least part of the rotor are arranged in a accommodating chamber, the stator contacts the inner wall of the first shell, and the part of the first shell on which the stator is installed and fixed is arranged near the exhaust port of the first airflow channel.

[0046] The stator contacts the inner wall of the first shell, which is beneficial to improving the heat conduction efficiency between the stator and the first shell, and is beneficial to quickly conduct the heat generated by the stator to the first shell and achieve heat dissipation through the first shell.

[0047] In some achievable embodiments, the motor assembly further includes an air scoop, the air scoop is disposed at one end of the second housing, the air scoop has a first air inlet, and the first air flow channel is connected to the first air inlet. The motor body further includes an impeller, the impeller is disposed in the air scoop, the rotor passes through the first housing, the impeller is connected to the rotor, and the rotor is used to drive the impeller to rotate so that the airflow is introduced into the first air flow channel after passing through the first air inlet.

[0048] In some feasible embodiments, the motor housing also includes a stator impeller, which includes a wheel body and a plurality of blades. Along the axial direction of the rotor, the wheel body is arranged between the first housing and the impeller, the wheel body is coaxial with the impeller, and the wheel body is fixedly connected to the first housing. The plurality of blades are arranged between the wheel body and the second housing at intervals along the circumference of the wheel body, wherein an air duct is provided between adjacent blades, and the air duct is connected to the first air inlet, so that the airflow sucked by the impeller enters from the first air inlet, flows through the air duct, and is discharged from the exhaust port of the first air flow channel.

[0049] In some feasible embodiments, a second airflow channel is arranged on the side of the base body facing the motor housing, and the first airflow channel, the second airflow channel and the third airflow channel are connected. Along the radial direction of the base body, the maximum depth of the third airflow channel is A, and the maximum depth of the second airflow channel is B, wherein B / 3≤A≤B.

[0050] When the maximum depth of the third airflow channel is less than B / 3, the depth of the third airflow channel itself is relatively small, and the maximum extension length of the wall along the radial direction of the base is relatively small, so that the turbulence effect of the silencer on the suction airflow is relatively biased, which is not conducive to reducing the noise generated during the suction airflow. When the maximum depth of the third airflow channel is greater than B, the depth of the third airflow channel itself is relatively large, and the maximum extension length of the wall along the radial direction of the base is relatively large, so that the size of the silencer in the radial direction of the base is relatively large, resulting in the silencer occupying more installation space when the silencer is used in a cleaning device, which is not conducive to the compact design of the cleaning device.

[0051] The seventh aspect of the embodiment of the present application provides a cleaning device, which includes a motor assembly and a motor cover. The motor assembly is arranged in the motor cover. The motor cover includes a second air inlet and a main air outlet. The second air inlet is connected to the first air flow channel. The air outlet of the third air flow channel is connected to the main air outlet.

[0052] In some practicable manners, the airflow is discharged along a first direction after passing through the exhaust port, and the first direction is the same as the axial direction of the substrate.

[0053] In some achievable embodiments, the base 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 cover. A wall is provided on the first base surface, and at least a portion of the wall is in contact with the motor cover. Along the axial direction of the base, the base includes a first end and a second end that are arranged opposite to each other. At least one air inlet is arranged near the first end. The cavity formed between the motor cover and the base is connected to the accommodating space in the base through the air inlet. The motor cover is sealed and connected to the first end. The airflow discharged along the first direction after passing through the exhaust port enters the third airflow channel through the air inlet, and is discharged to the air outlet along the second direction. Wherein, the first direction is opposite to the second direction.

[0054] In some achievable embodiments, along the radial direction of the base, there is a spacing distance L1 between the base and the motor cover. The width of the third airflow channel is W1, and the extension length of the third airflow channel is H. When 5mm≤W1≤1 / 2×L1≤1 / 4×H≤20mm, and along the first direction, when L1 increases, W1 decreases.

[0055] In some feasible embodiments, along the radial direction of the base, there is a spacing distance L1 between the base and the motor housing, and there is a spacing distance L2 between the top surface of the wall and the motor cover. In the longitudinal section of the motor cover and the base along the axis of the base, the angle between the outer surface of the base and the inner wall of the motor cover is α, and the angle between the top surface of the wall and the inner wall of the motor cover is β, wherein 45°≥α≥2β≥20°, and along the first direction, L1 and L2 both gradually increase or both gradually decrease. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 A schematic diagram of a partial structure of a motor assembly according to an embodiment of the present application;

[0058] Figure 2 A partial cross-sectional structural schematic diagram of a motor assembly according to an embodiment of the present application;

[0059] Figure 3 A schematic diagram of a partial structure of a motor housing according to an embodiment of the present application;

[0060] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a soundproof cover according to an embodiment of the present application;

[0061] Figure 5 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0062] Figure 6 A schematic diagram of a partial structure of a motor assembly according to an embodiment of the present application;

[0063] Figure 7 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0064] Figure 8 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0065] Fig. 9A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0066] Fig.10 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0067] Fig.11 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0068] Fig.12 A partial cross-sectional structural schematic diagram of a motor assembly according to an embodiment of the present application;

[0069] Fig.13 A schematic diagram of a partial structure of a soundproof cover according to an embodiment of the present application;

[0070] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure along the WW direction;

[0071] Fig.15 It is a schematic diagram of a partial cross-sectional structure of a soundproof cover according to an embodiment of the present application;

[0072] Fig.16 A partial cross-sectional structural schematic diagram of a cleaning device according to an embodiment of the present application;

[0073] Fig.17 A partial cross-sectional structural schematic diagram of a cleaning device according to an embodiment of the present application;

[0074] Fig.18 A partial cross-sectional structural schematic diagram of a cleaning device according to an embodiment of the present application;

[0075] Fig.19 It is a schematic diagram of a partial cross-sectional structure of a cleaning device according to an embodiment of the present application.

[0076] Description of reference numerals:

[0077] 10. Motor assembly;

[0078] 20. Motor body; 21. Stator; 22. Rotor; 23. Impeller;

[0079] 30, motor housing; 30a, first air inlet; 31, first housing; 311, boss; 32, second housing; 33, fixed impeller; 331, wheel body; 332, blades;

[0080] 40. Silencer;

[0081] 41, base; 41aa, accommodation space; 41a, first end; 41b, second end; 41c, first area; 41d, second area; 411, vent hole;

[0082] 42, wall body; 42a, first sub-wall body; 42b, second sub-wall body; 421, connecting channel;

[0083] 50. Shock-absorbing components;

[0084] 60, cover member; 60a, ventilation inlet; 60b, ventilation outlet;

[0085] 100, first air flow channel; 100a, exhaust port;

[0086] 200, second air flow channel;

[0087] 300, third air flow channel; 300a, air outlet; 301, sub-air flow channel;

[0088] 400, containing chamber;

[0089] 500, motor cover; 500a, second air inlet; 500b, main air outlet;

[0090] 600. Shock-absorbing structural parts;

[0091] 700, air guide cover;

[0092] Z1, first direction;

[0093] Z2, second direction. DETAILED DESCRIPTION

[0094] The embodiment of the present application provides a cleaning device. The cleaning device can be used in industrial environments or home environments to effectively replace manual cleaning of the area to be cleaned, thereby improving the efficiency of cleaning work. The cleaning device can be a sweeper, a vacuum cleaner, or a floor scrubber.

[0095] The cleaning device of the embodiment of the present application may include a motor cover and a motor assembly. The motor assembly is disposed in the motor cover. When the motor assembly is in operation, the motor assembly can suck air from the external environment to form a suction airflow with a relatively fast airflow velocity. Dust and other debris in the area to be cleaned will follow the suction airflow formed by the motor assembly into the cleaning device to be collected by the cleaning device, so that the cleaning device can effectively clean the area to be cleaned.

[0096] Figure 1 A partial structure of the motor assembly 10 is schematically shown. Figure 2 The partial cross-sectional structure of the motor assembly 10 is schematically shown. Figure 1 and Figure 2As shown, the motor assembly 10 of the embodiment of the present application may include a motor body 20. The motor body 20 is used to generate suction to form a negative pressure at the motor assembly 10, so that the air outside the cleaning device can be sucked. The motor body 20 may include a stator 21, a rotor 22 and an impeller 23. The impeller 23 is connected to the rotor 22. When the motor body 20 is powered on, the rotor 22 can rotate relative to the stator 21. The rotor 22 synchronously drives the impeller 23 to rotate. When the impeller 23 rotates, the motor assembly 10 can be used to suck air to form a suction airflow.

[0097] The motor assembly 10 of the embodiment of the present application may include a motor housing 30. The motor housing 30 includes a housing chamber 400. The motor housing 30 is sleeved on the motor body 20. The motor housing 30 may be sleeved on the outside of the motor body 20. The motor body 20 may be detachably connected to the motor housing 30. At least part of the motor body 20 may be located in the housing chamber 400. The motor housing 30 may protect the motor body 20 and reduce the possibility of structural damage to the motor body 20 due to impact.

[0098] In the embodiment of the present application, the motor housing 30 includes a first airflow channel 100. The first airflow channel 100 has an exhaust port 100a. When the motor assembly 10 is in operation, the suction airflow can enter the first airflow channel 100. After the suction airflow flows through the first airflow channel 100, the suction airflow is discharged from the exhaust port 100a of the first airflow channel 100. The exhaust port 100a of the first airflow channel 100 is disposed on the outer surface of the motor housing 30.

[0099] In some embodiments, the motor housing 30 includes a first housing 31 and a second housing 32. The second housing 32 is sleeved on the outer side of the first housing 31. A first airflow channel 100 is formed between the first housing 31 and the second housing 32. The first housing 31 has a receiving 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 receiving chamber 400 of the first housing 31. At least part of the rotor 22 is located in the receiving chamber 400.

[0100] The motor body 20 is disposed in the first housing 31 in such a way that the heat generated by the motor body 20 during operation 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 airflow channel 100, so the airflow flowing in the first airflow channel 100 can quickly take 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.

[0101] In some examples, the stator 21 contacts the inner wall of the first housing 31, which is beneficial to improve the heat conduction efficiency between the stator 21 and the first housing 31, and is beneficial for the heat generated by the stator 21 to be quickly conducted to the first housing 31 and dissipated through the first housing 31. The portion of the first housing 31 where the stator 21 is mounted and fixed is arranged close to the exhaust port 100a of the first airflow channel 100.

[0102] In some embodiments, the first housing 31 has a boss 311. The boss 311 is arranged facing the exhaust port 100a of the first airflow channel 100, and there is a distance between the boss 311 and the exhaust port 100a of the first airflow channel 100. The boss 311 is located on the flow path of the airflow in the first airflow channel 100. The boss 311 arranged 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 help reduce the 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 conducive to improving the heat dissipation efficiency of the first housing 31.

[0103] In some embodiments, the motor housing 30 includes a first air inlet 30a. The first air flow channel 100 is connected to the first air inlet 30a. When the motor assembly 10 is in operation, the suction air flow can enter the first air flow channel 100 through the first air inlet 30a.

[0104] In some examples, the rotor 22 passes through the first housing 31 along the axial direction of the motor body 20. The impeller 23 is connected to the rotor 22. The impeller 23 is located in the first air flow channel 100, and along the axial direction of the motor body 20, the impeller 23 is arranged facing the first air inlet 30a.

[0105] In some examples, along the axial direction of the rotor 22, the first air inlet 30a of the motor housing 30 is arranged corresponding to the impeller 23 of the motor body 20. The axial direction of the motor body 20 is the same as the axial direction of the rotor 22. When the stator 21 of the motor body 20 is powered on, 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 airflow formed by the air sucked by the motor assembly 10 can enter the first air inlet 30a and the first airflow channel 100 in sequence.

[0106] In some examples, the motor assembly 10 further includes an air guide cover 700. The air guide cover 700 is disposed at one end of the second housing 32. The air guide cover 700 has a first air inlet 30a. The first air flow channel 100 is connected to the first air inlet 30a.

[0107] The impeller 23 of the motor body 20 is disposed in the air guide cover 700. The rotor 22 is used to drive the impeller 23 to rotate, so that the airflow is introduced into the first air flow channel 100 after passing through the first air inlet 30a.

[0108] In some examples, Figure 3 The partial structure of the motor housing 30 is schematically shown. Figure 2 and Figure 3 As shown, the motor housing 30 also includes a stator wheel 33. The stator wheel 33 is disposed in the first airflow channel 100. The airflow sucked by the impeller 23 can flow through the stator wheel 33 and be discharged from the exhaust port 100a of the first airflow channel 100. The stator wheel 33 can guide the suction airflow. The suction airflow can flow regularly in the stator wheel 33, which is conducive to reducing the flow loss of the suction airflow during the flow process in the stator wheel 33, thereby playing a role in noise reduction and reducing the flow loss of the airflow.

[0109] In some examples, the fixed impeller 33 includes a wheel body 331 and a plurality of blades 332. Along the axial direction of the rotor 22, the wheel body 331 is disposed between the first housing 31 and the impeller 23. The axial direction of the rotor 22 is the same as the axial direction of the base 41. The wheel body 331 is coaxial with the impeller 23, and the wheel body 331 is fixedly connected to the first housing 31. The end of the rotor 22 passing through the wheel body 331 is connected to the impeller 23. A plurality of blades 332 are arranged at intervals along the circumference of the wheel body 331. A plurality of blades 332 are disposed between the wheel body 331 and the second housing. There is an air duct between adjacent blades 332. The air duct is connected to the first air flow channel 100 and the first air inlet 30a, so that the airflow sucked by the impeller 23 enters from the first air inlet 30a, flows through the air duct, and is discharged from the exhaust port 100a of the first air flow channel 100.

[0110] Figure 4 The partial cross-sectional structure of the noise reduction cover 40 is schematically shown. Figure 5 The partial structure of the muffler cover 40 is schematically shown. Figures 1 to 5 As shown, the motor assembly 10 of the embodiment of the present application may include a silencer 40. The silencer 40 is sleeved on the outside of the motor housing 30. The silencer 40 can block the exhaust port 100a of the first airflow channel 100. The suction airflow discharged from the first airflow channel 100 can be blocked by the silencer 40. The silencer 40 can be used to change the flow direction of the suction airflow, and the silencer 40 can also turbulent the suction airflow, which can help reduce the noise generated when the suction airflow flows. The noise generated when the suction airflow flows is the main noise source of the motor assembly 10.

[0111] The silencer 40 of the embodiment of the present application is arranged on the air outlet side of the motor assembly 10. The silencer 40 will not affect the air intake efficiency at the first air inlet 30a, so as to ensure that the motor assembly 10 generates an air flow suction volume that meets the requirements, so as to ensure that the motor assembly 10 generates a negative pressure that meets the requirements. Therefore, when the motor assembly 10 is in a working state, the motor assembly 10 can suck the air from the external environment to form a suction airflow with a faster airflow rate. Dust and other debris at the area to be cleaned will follow the suction airflow formed by the motor assembly 10 into the cleaning device to be collected by the cleaning device, so that the cleaning device can effectively clean the area to be cleaned.

[0112] The muffler cover 40 of the 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 has a containing space 41aa (see Figure 4 As shown). At least part of the motor body 20 can be located in the accommodation space 41aa. In some examples, the axial direction of the base 41 can be the same as the axial direction of the motor body 20. The base 41 is sleeved on the outer periphery of the motor housing 30 through the accommodation space 41aa. At least part of the motor housing 30 is located in the accommodation space 41aa. The exhaust port 100a of the first airflow channel 100 is arranged facing the inner wall of the base 41. The exhaust port 100a of the first airflow channel 100 is connected to the accommodation space 41aa.

[0113] In some achievable embodiments, a second airflow channel 200 is provided on a side of the base 41 facing the motor body 20. The first airflow channel 100 is connected to the second airflow channel 200. When the motor assembly 10 is in operation, the suction airflow can enter the first airflow channel 100. After the suction airflow flows through the first airflow channel 100, the suction airflow is discharged from the first airflow channel 100 and enters the second airflow channel 200. After the suction airflow flows through the second airflow channel 200, the suction airflow can finally flow to the outside of the base 41 through the base 41.

[0114] The silencer 40 of the embodiment of the present application may include a plurality of walls 42. Along the radial direction of the base 41, the wall 42 is protrudingly 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 airflow channel 300 is formed between adjacent walls 42. For example, a third airflow channel 300 is formed between two adjacent walls 42. Along the radial direction of the base 41, the wall 41 and the third airflow channel 300 are arranged on at least one of the inner side and the outer side of the base 41. A plurality of third airflow channels 300 may be formed on the base 41. The first airflow channel 100 and the third airflow channel 300 are interconnected.

[0115] The third air flow channel 300 is provided with an air inlet and an air outlet 300a. The airflow discharged from the exhaust port 100a of the first air flow channel 100 passes through the air inlet and then is guided out along the air outlet 300a of the third air flow channel 300. Exemplarily, in the axial direction of the base 41, there is an axial interval between the air inlet and the exhaust port 100a. Exemplarily, in the axial direction of the base 41, at least one air inlet and one air outlet 300a are respectively provided at both ends of the base 41.

[0116] The third airflow channel 300 includes at least two sub-airflow channels 301 that are connected to each other and are disposed between the air inlet and the air outlet 300a. The extension directions of the two adjacent sub-airflow channels 301 are different. The extension direction of the sub-airflow channel 301 may refer to the flow direction of the airflow in the sub-airflow channel 301 under the guidance of the wall 42 and the sub-airflow channel 301. For example, the extension direction may be the same as Figure 1 The direction indicated by the dashed arrow is the same. When the suction airflow encounters the wall 42 and the third airflow channel 300, the suction airflow entering the third airflow channel 300 can flow into each sub-airflow channel 301. When the suction airflow can flow from one sub-airflow channel 301 to the next sub-airflow channel 301 with a different extension direction, the flow direction of the suction airflow can also change, so as to facilitate the muffler 40 to effectively turbulent the suction airflow.

[0117] In some practicable embodiments, at least one sub-airflow channel 301 extends along the circumference of the base 41. The airflow discharged from the exhaust port 100a passes through the accommodating space 41aa and the air inlet in sequence, enters the plurality of sub-airflow channels 301, and is discharged from the air outlet 300a.

[0118] The base body 41 includes a first end 41a and a second end 41b in the axial direction thereof. The third air flow channel 300 extends from the first end 41a to the second end 41b. The air outlet 300a of the third air flow channel 300 is disposed at the second end 41b.

[0119] In some achievable embodiments, the second air flow channel 200 is disposed on a side of the base 41 facing the motor body 20. The first air flow channel 100 and the second air flow channel 200 are connected to each other.

[0120] The wall 42 and the third air flow channel 300 provided on the muffler cover 40 of the embodiment of the present application may be as follows: Figure 1 and Figure 5 The relatively regular structure shown. Figure 6 The partial structure of the motor assembly 10 is schematically shown. The wall 42 and the third air flow channel 300 provided on the muffler cover 40 of the embodiment of the present application may also be as follows Figure 6 The relatively irregular structure shown.

[0121] The motor assembly 10 of the embodiment of the present application can be applied to cleaning devices such as sweepers, vacuum cleaners or floor scrubbers. The motor assembly 10 in the working state can suck air from the outside of the cleaning device and form a suction airflow flowing inside the cleaning device. Dirt such as dust at the area to be cleaned can follow the suction airflow into the cleaning device and be collected by the cleaning device. The motor assembly 10 of the embodiment of the present application may include a motor housing 30 and a silencer 40. The motor housing 30 includes a first airflow channel 100. A plurality of wall bodies 42 are arranged on the base 41 of the silencer 40. A third airflow channel 300 can be formed between adjacent walls 42. The first airflow channel 100 is connected to the third airflow channel 300. The third airflow channel 300 includes at least two sub-airflow channels 301 that are interconnected. At least one sub-airflow channel 301 extends along the circumference of the base 41. The third airflow channel 300 itself has a relatively long extension length as a whole, and the third airflow channel 300 has sub-airflow channels 301 with different extension directions that can be used to change the flow direction of the suction airflow, so that the suction airflow changes its flow direction multiple times in the axial direction of the base 41, so that the silencer 40 is conducive to effective axial turbulence of the suction airflow. Therefore, the silencer 40 of the embodiment of the present application can effectively turbulent the suction airflow in the axial direction of the base 41, which is conducive to reducing the noise generated when the suction airflow flows. At the same time, since the silencer 40 used in the silencer structure of the embodiment of the present application is a single-layer shell structure, there is no need to set a multi-layer shell structure outside the motor housing 30, and a good noise reduction effect can be achieved. Compared with the prior art, the radial size of the silencer structure in the motor housing 30 can be effectively reduced, which is conducive to the miniaturized design of the silencer 40, and then to the miniaturized design of the motor assembly 10.

[0122] In addition, the wall body 42 is arranged on the outer surface of the base 41, so that the silencer 40 formed by the base 41 and the wall body 42 has a relatively high mechanical strength as a whole, so that the silencer 40 is not easy to vibrate under the impact of the suction airflow, which is beneficial to reduce the possibility of vibration noise caused by the vibration of the silencer 40 itself, and further helps to reduce the noise generated by the flow of the suction airflow.

[0123] In some possible implementations, see Figure 1 , Figure 2 , Figure 5 or Figure 6 As shown, a wall 42 is provided on the outer surface of the base 41 facing away from 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 41 facing away from the motor housing 30 can be defined as the outer surface of the base 41. The second base surface of the base 41 facing the motor housing 30 can be defined as the inner surface of the base 41.

[0124] In some achievable embodiments, the third airflow channel 300 is disposed on the outer side of the base 41 facing away from the motor housing 30. The third airflow channel 300 includes an air inlet and an air outlet 300a. Part of the wall 42 is disposed on the first base surface of the base 41 to form the third airflow channel 300 on the first base surface.

[0125] At least one air inlet portion is connected to the accommodating space 41aa of the base body 41 and the third air flow channel 300 on the first base surface. A plurality of sub-air flow channels 301 form the third air flow channel 300.

[0126] The air outlet portion 300a of the third air flow channel 300 may be disposed at the second end portion 41b of the base body 41. The suction airflow may enter the third air flow channel 300 from the air inlet portion of the third air flow channel 300, and then flow toward the air outlet portion 300a of the third air flow channel 300 along the extension direction of the third air flow channel 300 and finally be guided out from the air outlet portion 300a of the third air flow channel 300.

[0127] The extension direction of the third airflow channel 300 may refer to the flow direction of the airflow in the third airflow channel 300 under the guidance of the wall 42 and the third airflow 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 flow direction multiple times in the axial direction of the base 41, so that the muffler 40 achieves an axial turbulence effect on the suction airflow, thereby reducing the noise generated when the suction airflow flows.

[0128] The first airflow channel 100 allows the airflow to flow in the accommodation space 41aa of the base 41 along the first direction Z1 after passing through the exhaust port 100a. The airflow is guided out of 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 both the same as the axial direction of the base 41. Figure 2 The bottom-to-top direction in the state shown) and the second direction Z2 ( Figure 2 The top-to-bottom direction in the state shown is opposite.

[0129] In some embodiments, along the radial direction of the substrate 41, the exhaust port 100a has an orthographic projection on the second base surface of the substrate 41. Along the axial direction of the substrate 41, the orthographic projection of the exhaust port 100a on the second base surface of the substrate 41 may be located between the air inlet and the air outlet 300a of the third air flow channel 300.

[0130] In some embodiments, the base 41 may include a vent hole 411. The air inlet portion of the third air flow channel 300 includes a vent hole 411 that penetrates the base 41 in a radial direction.

[0131] In some embodiments, the base 41 may include a vent 411. The vent 411 is used to pass the suction airflow. The vent 411 connects the first airflow channel 100 and the third airflow channel 300. The vent 411 is correspondingly arranged between two adjacent walls 42. In some examples, the air inlet of the third airflow channel 300 can be arranged corresponding to the vent 411 of the base 41. The suction airflow discharged from the vent 411 of the base 41 can enter the air inlet of the third airflow channel 300, and then the suction airflow flows to the air outlet 300a of the third airflow channel 300 and is finally discharged from the air outlet 300a of the third airflow channel 300.

[0132] In some embodiments, the air outlet 300a of the third air flow channel 300 is disposed near the first air inlet 30a. Along the axial direction of the base 41, the air outlet 300a of the third air flow channel 300 and the first air inlet 30a are disposed on the same side of the motor assembly 10. In some examples, the flow direction of the suction airflow in the first air inlet 30a may be opposite to the flow direction of the suction airflow discharged from the air outlet 300a of the third air flow channel 300.

[0133] In the present application examples, see Figure 5 As shown, the third airflow channel 300 includes a plurality of sub-airflow channels 301 that are sequentially connected to each other. In the extension direction of the third airflow channel 300, the plurality of sub-airflow channels 301 are sequentially connected to each other. In the third airflow channel 300, at least two sub-airflow channels 301 extend in different directions.

[0134] Exemplarily, the extension directions of two adjacent sub-airflow channels 301 are different. The suction airflow entering the third airflow channel 300 can flow through each sub-airflow channel 301. When the suction airflow flows from one sub-airflow channel 301 to the next sub-airflow channel 301, the flow direction of the suction airflow can change, so as to facilitate effective turbulence of the suction airflow.

[0135] In some achievable ways, when the motor assembly 10 is applied to a cleaning device, the suction airflow may enter the first airflow channel 100 of the motor assembly 10. In 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 airflow enters the third airflow channel 300 from the second airflow channel 200, the flow direction of the suction airflow may be reversed by 180°, so that the flow direction of the suction airflow in the second airflow channel 200 is opposite to the flow direction of the suction airflow in the third airflow channel 300.

[0136] In some possible implementations, see Figure 2 , Figure 4 and Figure 5 As shown, along the axial direction of the base 41, the first end 41a and the second end 41b are arranged opposite to each other. Along the axial direction of the base 41, the first end 41a of the base 41 is far away from the first air inlet 30a, while the second end 41b is close to the first air inlet 30a. The third air flow channel 300 arranged outside the muffler 40 has an air inlet portion and an air outlet portion 300a. The air inlet portion of the third air flow channel 300 is arranged away from the second end 41b. The air outlet portion 300a of the third air flow channel 300 is arranged close to the second end 41b.

[0137] The suction airflow entering the third airflow channel 300 will flow through each sub-airflow channel 301, and finally be discharged from the air outlet 300a of the third airflow channel 300. Since the third airflow channel 300 of the muffler 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-airflow channels 301 of the third airflow channel 300 can effectively increase the number of changes in the flow direction of the suction airflow, the muffler cover 40 can effectively turbulent the suction airflow in the axial direction of the base 41, thereby helping to reduce the noise generated when the suction airflow flows.

[0138] In the embodiment of the present application, the material of the motor housing 30 may be plastic. The material of the muffler cover 40 may be plastic.

[0139] In some achievable ways, Figure 7 The partial structure of the muffler cover 40 is schematically shown. Figure 7 As shown, in the extension direction of the third airflow channel 300, the cross-sectional area of ​​the third airflow channel 300 increases, that is, the ventilation volume of the third airflow channel 300 increases. During the flow of the suction airflow from the air inlet portion to the air outlet portion 300a of the third airflow channel 300, the air pressure of the suction airflow tends to decrease relatively, so as to help reduce the noise generated when the suction airflow flows.

[0140] In some examples, in the extension direction of the third airflow channel 300, the cross-sectional area of ​​the third airflow channel 300 gradually increases, that is, the ventilation volume of the third airflow channel 300 gradually increases. In each cross section of the third airflow channel 300, the closer to the air outlet 300a of the third airflow channel 300, the larger the cross-sectional area of ​​the third airflow channel 300. The cross-sectional area of ​​the third airflow channel 300 can be varied.

[0141] In some achievable ways, Figure 8 The partial structure of the muffler cover 40 is schematically shown. Figure 8As shown, the number of the third airflow channels 300 arranged outside the muffler 40 is more than two. At least two third airflow channels 300 can be interconnected. The suction airflow flowing in one third airflow channel 300 can partially flow into another third airflow channel 300, so that the suction airflows in the two third airflow channels 300 can achieve mixed flow and crosstalk, which is conducive to improving the turbulence effect of the muffler 40 on the suction airflow, and further reducing the noise generated when the suction airflow flows.

[0142] In some examples, among all the third air flow channels 300 provided in the silencer 40 , any two adjacent third air flow channels 300 may be interconnected, thereby further effectively increasing the number of times the suction airflow in the third air flow channels 300 achieves mixing and crosstalk.

[0143] In some examples, at least one wall 42 is provided with a connecting channel 421. The connecting channel 421 connects two adjacent third airflow channels 300. The suction airflow flowing in one third airflow channel 300 can partially flow into another third airflow channel 300 through the corresponding connecting channel 421, so that the suction airflows in the two third airflow channels 300 can achieve mixed flow and crosstalk, which is conducive to improving the disturbing effect of the muffler 40 on the suction airflow. Exemplarily, one or more connecting channels 421 can be provided on at least one wall 42, and the embodiment of the present application does not specifically limit the number of connecting channels 421.

[0144] For example, see Figure 8 As shown, all the walls 42 are provided with connecting channels 421, and the connecting channels 421 are staggered, that is, the positions of the connecting channels 421 are different. For example, the connecting channel 421 provided on one wall 42 and the connecting channel 421 provided on another adjacent wall 42 are not arranged facing each other. Along the axial direction of the base 41, the connecting channel 421 provided on one wall 42 and the connecting channel 421 provided on another adjacent wall 42 are staggered with each other. Each third airflow channel 300 can achieve more times of mixed flow and crosstalk through each connecting channel 421 with different positions, so as to further enhance the disturbing effect of the muffler 40 on the suction airflow.

[0145] Exemplarily, in a cross section corresponding to any one of the connecting channels 421 on the base 41 , there is only one cross section of the connecting channel 421 on the cross section. The cross section of the base 41 is perpendicular to the axial direction of the base 41 .

[0146] In some achievable embodiments, in the third airflow channel 300, the extension direction of at least one sub-airflow channel 301 is the same as the axial direction of the base 41. After the suction airflow enters the sub-airflow channel 301 extending in the same direction as the axial direction of the base 41, the flow direction of the suction airflow may be the same as the axial direction of the base 41. The sub-airflow channels 301 extending in different directions may effectively change the flow direction of the suction airflow, so as to effectively turbulent the suction airflow.

[0147] In some achievable embodiments, in the third airflow channel 300, the extension direction of at least one sub-airflow channel 301 is the same as the circumference of the substrate 41. The circumference of the substrate 41 refers to the axial direction surrounding the substrate 41. After the suction airflow enters the sub-airflow channel 301 having the same extension direction as the circumference of the substrate 41, the flow direction of the suction airflow can be perpendicular to the axial direction of the substrate 41. The sub-airflow channels 301 having different extension directions can effectively change the flow direction of the suction airflow to effectively turbulent the suction airflow. In some examples, the substrate 41 is a cylindrical structure. For example, the substrate 41 can be a cylindrical structure. The axial direction of the substrate 41 is the axial direction of the substrate 41.

[0148] In some achievable embodiments, in the third air flow channel 300 , the extension direction of at least one sub-air flow channel 301 is different from the circumferential direction of the base 41 .

[0149] In some possible implementations, see Figure 8 As shown, in the third airflow channel 300, the extension direction of one of any two adjacent sub-airflow channels 301 is the same as the axial direction of the substrate 41, and the extension direction of the other is the same as the circumferential direction of the substrate 41. After the suction airflow flowing through the sub-airflow channel 301 whose extension direction is the same as the axial direction of the substrate 41 enters the sub-airflow channel 301 whose extension direction is the same as the circumferential direction of the substrate 41, the flow direction of the suction airflow is bent to a large extent, so that the flow direction of the suction airflow can be changed to a large extent, so as to effectively disturb the suction airflow. In some examples, the substrate 41 is a cylindrical structure. For example, the substrate 41 can be a cylindrical structure. The axial direction of the substrate 41 is the axial direction of the substrate 41.

[0150] In some achievable ways, Fig. 9 The partial structure of the muffler cover 40 is schematically shown. Fig. 9 As shown, in the third airflow channel 300, each sub-airflow channel 301 extends spirally along the axial direction of the substrate 41. The extension direction of any sub-airflow channel 301 is different from the axial direction of the substrate 41 and also different from the circumferential direction of the substrate 41. In some examples, the substrate 41 can be a cylindrical structure. The axial direction of the substrate 41 is the axial direction of the substrate 41.

[0151] In some embodiments, Fig.10The partial structure of the muffler cover 40 is schematically shown. Fig.10 As shown, in the third airflow channel 300, the extension lengths of at least two sub-airflow channels 301 can be different. In some examples, the extension length of the sub-airflow channel 301 close to the air outlet 300a is greater than the extension length of the sub-airflow channel 301 away from the air outlet 300a. The relatively short extension length of the sub-airflow channel 301 away from the air outlet 300a can enable the suction airflow entering the third airflow channel 300 to achieve a relatively large number of flow direction changes within a short flow distance, which is conducive to disturbing the suction airflow. The relatively long extension length of the sub-airflow channel 301 close to the air outlet 300a can help reduce the flow resistance of the suction airflow.

[0152] In the embodiment of the present application, Fig.11 The partial structure of the muffler cover 40 is schematically shown. Fig.11 As shown, the base 41 includes a plurality of vents 411. The plurality of vents 411 can be arranged at intervals along the extension direction of the third airflow channel 300. The plurality of vents 411 can simultaneously deliver the suction airflow into the corresponding third airflow channel 300 to increase the air intake of the third airflow channel 300. In addition, the base 41 can effectively divide the suction airflow by delivering the suction airflow through the plurality of vents 411, so as to improve the turbulence effect of the base 41 on the suction airflow. The suction airflow output by the vents 411 away from the air outlet 300a can be mixed and crosstalked with the suction airflow output by the vents 411 close to the air outlet 300a, so as to improve the turbulence effect of the silencer 40 on the suction airflow.

[0153] In some embodiments, the shape of the vent hole 411 may be circular, elliptical, or polygonal. For example, the shape of the vent hole 411 may be triangular, rectangular, or hexagonal.

[0154] In some embodiments, each third air flow channel 300 is correspondingly provided with a plurality of ventilation holes 411 .

[0155] In some embodiments, see Fig.11 As shown, the substrate 41 has a first area 41c and a second area 41d. The first area 41c is arranged corresponding to the exhaust port 100a of the first airflow channel 100. Along the axial direction of the substrate 41, the second areas 41d are arranged on both sides of the first area 41c. Exemplarily, the substrate 41 has a first area 41c and two second areas 41d. Along the axial direction of the substrate 41, one second area 41d is arranged on both sides of the first area 41c.

[0156] In some examples, the aperture of the vent hole 411 disposed on the first region 41c is larger than the aperture of the vent hole 411 disposed on the second region 41d. The larger the aperture of the vent hole 411, the greater the ventilation volume per unit time of the vent hole 411.

[0157] The air pressure of the suction airflow output from the exhaust port 100a of the first airflow channel 100 is relatively large. The relatively large aperture of the vent holes 411 provided on the first area 41c is arranged so as to facilitate the suction airflow to be discharged quickly and smoothly through the vent holes 411. The resistance formed by the suction airflow output from the vent holes 411 of the second area 41d to the suction airflow output from the vent holes 411 of the first area 41c is relatively small, which is conducive to the suction airflow output from the vent holes 411 of the first area 41c to flow smoothly to the air outlet 300a of the third airflow channel 300.

[0158] In some examples, a plurality of vents 411 are provided in the second region 41d near the first end 41a. A plurality of vents 411 are provided in the second region 41d near the second end 41b. The total opening area of ​​the plurality of vents 411 in the second region 41d near the first end 41a is S1, and the total opening area of ​​the plurality of vents 411 in the second region 41d near the second end 41b is S2, where S2≤S1.

[0159] In the embodiment of the present application, Fig.12 The partial cross-sectional structure of the motor assembly 10 is schematically shown. Fig.12 As shown, the motor housing 30 may also include a first air inlet 30a. The first air flow channel 100 is connected to the first air inlet 30a. The suction air flow can enter the first air flow channel 100 from the first air inlet 30a. The air outlet 300a of the third air flow channel 300 is arranged close to the first air inlet 30a. Along the radial direction of the base 41, the air outlet 300a of the third air flow channel 300 is spaced apart from the first air inlet 30a. 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, that is, the air outlet 300a of the third air flow channel 300 is not connected to the first air inlet 30a. Since the suction airflow enters the motor assembly 10 from the first air inlet 30a, and then flows through the first airflow channel 100 and the third airflow channel 300, and finally discharges the motor assembly 10 from the air outlet 300a of the third airflow channel 300, the arrangement of the air outlet 300a of the third airflow channel 300 close to the first air inlet 30a can effectively extend the flow path of the suction airflow, so that the silencer 40 can effectively turbulent the suction airflow.

[0160] In some possible implementations, see Fig.12As shown, the motor housing 30 may further include a cover component 60. The cover component 60 is connected to the first housing 31. The cover component 60 covers the opening of the accommodating chamber 400. The cover component 60 includes a ventilation inlet 60a and a ventilation outlet 60b. Along the axial direction of the base 41, the first air inlet 30a and the ventilation inlet 60a are relatively arranged. The ventilation inlet 60a and the ventilation outlet 60b are both connected to the accommodating chamber 400. When the motor assembly 10 is in a working state, the airflow entering from the ventilation inlet 60a can enter the accommodating chamber 400, and then the airflow takes away the heat generated by the motor body 20 and is discharged from the ventilation outlet 60b to cool the motor body 20, thereby effectively avoiding the situation where the normal operation of the motor body 20 is affected by the excessive temperature rise of the motor body 20.

[0161] In some possible implementations, see Fig.12 As shown, the motor assembly 10 may further include a shock absorbing component 50. The shock absorbing component 50 is disposed between the base 41 and the motor housing 30. When the motor assembly 10 is in operation, the shock absorbing component 50 can effectively absorb vibrations, which is beneficial to reducing the possibility of noise due to vibration of the base 41 as a whole. In some examples, the shock absorbing component 50 may be an elastic structural member. The material of the shock absorbing component 50 may be, but is not limited to, rubber or silicone. In some examples, the shock absorbing component 50 may be snap-fitted or bonded to the motor housing 30. The shock absorbing component 50 may be snap-fitted or bonded to the base 41.

[0162] In the embodiment of the present application, the muffler cover 40 can be an integrally formed structure, which is conducive to improving the overall mechanical strength of the muffler cover 40, so that the muffler cover 40 is not easy to vibrate under the impact of the suction airflow, which is conducive to reducing the possibility of vibration noise caused by the vibration of the muffler cover 40 itself, and further conducive to reducing the noise generated when the suction airflow flows. In some embodiments, the material of the base 41 and the material of the wall 42 are both plastic. The muffler cover 40 with an integrally formed structure can be processed by injection molding.

[0163] In some achievable ways, Fig.13 A partial structure of the soundproof cover 40 is schematically shown. Fig.14 for Fig.13 The cross-sectional structure along the WW direction. Fig.13 and Fig.14As shown, the wall body 42 includes a plurality of first sub-wall bodies 42a and a plurality of second sub-wall bodies 42b. Along the radial direction of the base 41, the extension length H1 of the first sub-wall body 42a is greater than the extension length H2 of the second sub-wall body 42b. The extension length of the first sub-wall body 42a and the extension length of the second sub-wall body 42b refer to the dimensions of the first sub-wall body 42a and the second sub-wall body 42b protruding from the surface of the base 41 along the radial direction of the base 41. The extension lengths of the first sub-wall body 42a and the second sub-wall body 42b are different, so that the wall body 42 forms a recess at the position corresponding to the second sub-wall body 42b. In some examples, the suction airflow can flow in the recess of the wall body 42, so that the recess of the wall body 42 and the third airflow channel 300 can jointly form a disturbance to the suction airflow, so as to further enhance the turbulence effect of the muffler 40 on the suction airflow.

[0164] In some possible implementations, see Fig.14 As shown, a second airflow channel 200 is provided on the side of the base 41 facing the motor housing. The first airflow channel 100, the second airflow channel 200 and the third airflow channel 300 are connected. Along the radial direction of the base 41, the maximum depth of the third airflow channel 300 is A, and the maximum depth of the second airflow channel 200 is B, wherein B / 3≤A≤B. When the maximum depth of the third airflow channel 300 is less than B / 3, the depth of the third airflow channel 300 itself is relatively small, and the maximum extension length of the wall body 42 along the radial direction of the base 41 is relatively small, so that the turbulence effect of the silencer 40 on the suction airflow is relatively deviated, which is not conducive to reducing the noise generated during the suction airflow. When the maximum depth of the third airflow channel 300 is greater than B, the depth of the third airflow channel 300 itself is relatively large, and the maximum radial extension length of the wall 42 along the base 41 is relatively large, which makes the radial size of the silencer 40 on the base 41 relatively large. As a result, when the silencer 40 is used in a cleaning device, the silencer 40 will occupy more installation space, which is not conducive to the compact design of the cleaning device.

[0165] In some achievable ways, Fig.15 The partial cross-sectional structure of the muffler cover 40 is schematically shown. Fig.15As shown, a wall body 42 is provided on the inner surface (i.e., the second base surface) of the base 41 facing the motor housing 30. The third airflow channel 300 is located on the inner side of the base 41 facing the motor housing 30. The first airflow channel 100 is connected to the third airflow channel 300. The suction airflow discharged from the exhaust port 100a of the first airflow channel 100 can enter the third airflow channel 300. The third airflow channel 300 can form a turbulent flow to the suction airflow, so as to help reduce the noise generated when the suction airflow is sucked. In some examples, a vent 411 is provided on the base 41 corresponding to the third airflow channel 300. The suction airflow after the turbulent flow treatment through the third airflow channel 300 can be discharged to the outside of the muffler 40 through the vent 411.

[0166] In some practicable embodiments, the outer surface (ie, the first base surface) and the inner surface (ie, the second base surface) of the base 41 may both be provided with a wall 42. In the radial direction of the base 41, the outer side and the inner side of the base 41 may both be provided with a third air flow channel 300.

[0167] The embodiment of the present application also provides a cleaning device. Fig.16 Schematically shows the partial cross-sectional structure of the cleaning device. Fig.16 As shown, the cleaning device may include a motor cover 500. The silencer cover 40 is disposed in the motor cover 500. The motor cover 500 also includes a second air inlet 500a and a main air outlet 500b. The second air inlet 500a is connected to the first air flow channel 100. The third air flow channel 300 is connected to the main air outlet 500b. The suction airflow can enter the first air flow channel 100 and the third air flow channel 300 through the second air inlet 500a. The suction airflow flowing through the first air flow channel 100 and the third air flow channel 300 can eventually enter the main air outlet 500b and be discharged from the main air outlet 500b to the external environment.

[0168] In some embodiments, the airflow drawn from the second air inlet 500a and the first air inlet 30a of the motor housing 30 may enter the first airflow channel 100. The airflow passes through the exhaust port 100a of the first airflow channel 100 and is guided out along the first direction Z1. The first direction Z1 is the same as the axial direction of the base 41.

[0169] In some embodiments, the main air outlet 500b of the motor cover 500 is disposed near the second air inlet 500a. In some examples, the flow direction of the suction airflow in the second air inlet 500a may be opposite to the flow direction of the suction airflow discharged from the main air outlet 500b. In some examples, along the axial direction of the base 41, the main air outlet 500b and the second air inlet 500a of the motor cover 500 may be disposed on the same side of the motor assembly 10.

[0170] In some embodiments, along the axial direction of the base 41 , the first air inlet 30 a of the motor housing 30 is arranged corresponding to the second air inlet 500 a of the motor cover 500 .

[0171] In some embodiments, the base 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 cover 500. The base 41 is provided with a wall 42 on the first base surface facing the motor cover 500, and at least a portion of the wall 42 can abut against the inner wall of the motor cover 500. The motor cover 500 blocks the third air flow channel 300. The manner in which the wall 42 of the silencer cover 40 abuts against the inner wall of the motor cover 500, on the one hand, the motor cover 500 can provide support for the silencer cover 40, so as to facilitate fixing the position of the silencer cover 40 and reduce the possibility of vibration noise caused by the unstable position of the silencer cover 40; on the other hand, the contact area between the wall 42 of the silencer cover 40 and the inner wall of the motor cover 500 can be increased to increase the heat dissipation area between the silencer cover 40 and the motor cover 500, which is conducive to improving the heat dissipation efficiency of the heat dissipated by the motor cover 500.

[0172] In some examples, along the axial direction of the base 41, the base 41 includes a first end 41a and a second end 41b that are arranged opposite to each other. At least one air inlet is arranged near the first end 41a. The cavity formed between the motor cover 500 and the base 41 is communicated with the accommodating space 41aa in the base 41 through the air inlet. The motor cover 500 is sealed and connected to the first end 41a. The cavity formed between the motor cover 500 and the base 41 is connected to the third air flow channel 300. After passing through the exhaust port 100a of the first air flow channel 100, the air flow guided along the first direction Z1 enters the third air flow channel 300 through the air inlet, and is guided to the air outlet 300a of the third air flow channel 300 along the second direction Z2. Wherein, along the axial direction of the base 41, the first direction Z1 is opposite to the second direction Z2. Exemplarily, the air vent 411 provided on the base 41 can be used as an air inlet.

[0173] In some examples, the wall 42 provided at the exhaust port 100a of the first airflow channel 100 on the base 41 abuts against the motor cover 500. The impact force of the suction airflow discharged from the exhaust port 100a of the first airflow channel 100 on the base 41 is relatively large. If the area of ​​the base 41 corresponding to the exhaust port 100a of the first airflow channel 100 is in a suspended state with the motor cover 500, when the base 41 bears a relatively large impact force, the base 41 itself is prone to vibrate and generate vibration noise. The way in which the wall 42 provided at the exhaust port 100a of the first airflow channel 100 on the base 41 abuts against the motor cover 500 is conducive to the motor cover 500 to support the area of ​​the base 41 corresponding to the exhaust port 100a of the first airflow channel 100, so as to effectively solve the above-mentioned problems.

[0174] Exemplarily, the base 41 has a first area 41c and a second area 41d. The first area 41c is provided corresponding to the exhaust port 100a of the first airflow channel 100. The first area 41c is provided with a wall 42. The wall 42 provided in the first area 41c abuts against the motor cover 500. Exemplarily, the first area 41c and the second area 41d are both provided with a wall 42.

[0175] In some embodiments, the wall body 42 includes a plurality of first sub-wall bodies 42a and a plurality of second sub-wall bodies 42b. In the radial direction of the base body 41, the extension length of the first sub-wall body 42a is greater than the extension length of the second sub-wall body 42b. The first sub-wall body 42a can abut against the motor cover 500. There is a spacing between the second sub-wall body 42b and the motor cover 500 to form a flow passage, so that the suction airflow can flow between the second sub-wall body 42b and the motor cover 500 to enhance the disturbance effect of the suction airflow.

[0176] In some embodiments, the cleaning device may be a handheld device. For example, the cleaning device may be a handheld vacuum cleaner or a floor scrubber. The main air outlet 500b of the motor cover 500 is arranged to face away from the user, so that the suction airflow discharged from the main air outlet 500b of the motor cover 500 will not blow toward the user, thereby improving the user experience.

[0177] In some embodiments, Fig.17 Schematically shows the partial cross-sectional structure of the cleaning device. Fig.17 As shown, the cleaning device further includes a shock absorbing structure 600. The shock absorbing structure 600 is arranged between the wall 42 and the motor cover 500. At least a portion of the wall 42 abuts against the shock absorbing structure 600. The wall 42 and the motor cover 500 jointly squeeze the shock absorbing structure 600. When the motor assembly 10 is in working state, the shock absorbing component 50 can effectively absorb vibration, which is helpful to reduce the possibility of noise due to the vibration of the silencer cover 40 as a whole.

[0178] In some examples, the shock absorbing structure 600 may be a flexible structure. When the shock absorbing structure 600 is subjected to an extrusion force, it is easy to be compressed and deformed and accumulate elastic potential energy. In some examples, the material of the shock absorbing structure 600 may be, but is not limited to, rubber or silicone.

[0179] In some examples, the shock absorbing structure 600 may be a cylindrical structure. The shock absorbing structure 600 may be connected to the inner wall of the motor cover 500. For example, the shock absorbing structure 600 may be bonded to the inner wall of the motor cover 500. The silencer cover 40 may be disposed in the shock absorbing structure 600, and the silencer cover 40 may squeeze the shock absorbing structure 600.

[0180] In some embodiments, Fig.18 Schematically shows the partial cross-sectional structure of the cleaning device. Fig.18 As shown, a wall body 42 is provided on the inner surface of the base body 41 facing away from the motor cover 500. At least a part of the wall body 42 abuts against the motor housing 30. On the one hand, the motor housing 30 can provide support for the silencer cover 40, so as to facilitate fixing the position of the silencer cover 40 and reduce the possibility of vibration noise caused by the unstable position of the silencer cover 40; on the other hand, the contact area between the wall body 42 and the motor housing 30 can be increased to increase the heat dissipation area between the silencer cover 40 and the motor housing 30, which is conducive to improving the heat dissipation efficiency of the heat dissipated through the motor housing 30 and the silencer cover 40.

[0181] In some examples, the wall body 42 includes a plurality of first sub-wall bodies 42a and a plurality of second sub-wall bodies 42b. In the radial direction of the base body 41, the extension length of the first sub-wall bodies 42a is greater than the extension length of the second sub-wall bodies 42b. Some of the first sub-wall bodies 42a abut against the motor housing 30.

[0182] In some achievable ways, Fig.19 Schematically shows the partial cross-sectional structure of the cleaning device. Fig.19 As shown, along the radial direction of the base 41, there is a spacing distance L1 between the first base surface (outer surface) of the base 41 and the motor cover 500. The width of the third air flow channel 300 is W1 (see Figure 5 The extension length of the third airflow channel 300 is H. 5 mm ≤ W1 ≤ L1 / 2 ≤ H / 4 ≤ 20 mm, and along the first direction Z1, when L1 increases, W1 decreases.

[0183] In some possible implementations, see Fig.19 As shown, 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 rotating body arranged with the axis of the output shaft. Exemplarily, the base 41 is in the shape of a frustum. Along the radial direction of the base 41, there is a spacing distance L1 between the first base surface (outer surface) of the base 41 and the motor cover 500, and there is a spacing distance L2 between the top surface of the wall 42 and the motor cover 500. Fig.19 The state shown is a partial structure of a longitudinal section of the cleaning device cut 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. Among them, 45°≥α≥2β≥20°.

[0184] In some examples, along the first direction Z1, L1 and L2 may both gradually increase. Alternatively, in other examples, along the first direction Z1, L1 and L2 may both gradually decrease.

[0185] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0186] The embodiments of the present application do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0187] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, systems, products or devices.

[0188] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0189] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0190] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent wall bodies, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet portion, an air outlet portion and at least two sub-airflow channels which are interconnected and arranged between the air inlet portion and the air outlet portion, the extension directions of adjacent sub-airflow channels are different, at least one sub-airflow channel extends along the circumference of the base body, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet portion in sequence, then enters the multiple sub-airflow channels, and is discharged from the air outlet portion.

2. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent walls, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are arranged between the air inlet and the air outlet and are interconnected, the extension directions of the adjacent sub-airflow channels are different, at least one sub-airflow channel extends along the circumference of the base body, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence, enters into the plurality of sub-airflow channels, and is discharged from the air outlet; The number of the third air flow channels is two or more, and at least two of the third air flow channels are interconnected.

3. The motor assembly according to claim 2, characterized in that: At least one of the walls is provided with a communication channel, and two adjacent third air flow channels are connected via the communication channel.

4. The motor assembly according to claim 3, characterized in that: The connecting passages are arranged on all the walls, and the connecting passages are arranged in staggered positions.

5. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent walls, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are arranged between the air inlet and the air outlet and are interconnected, the adjacent sub-airflow channels have different extension directions, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence, then enters the plurality of sub-airflow channels, and is discharged from the air outlet; In the third air flow channel, an extension direction of one of any two adjacent sub-air flow channels is the same as the axial direction of the base, and an extension direction of the other sub-air flow channel is the same as the circumferential direction of the base.

6. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent wall bodies, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet portion, an air outlet portion and at least two sub-airflow channels which are arranged between the air inlet portion and the air outlet portion and are interconnected, the extension directions of adjacent sub-airflow channels are different, each sub-airflow channel extends in an axial spiral along the base body, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet portion in sequence, enters into the plurality of sub-airflow channels, and is discharged from the air outlet portion.

7. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent wall bodies, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet portion, an air outlet portion and at least two sub-airflow channels which are arranged between the air inlet portion and the air outlet portion and are interconnected, the extension directions of adjacent sub-airflow channels are different, at least one sub-airflow channel extends along the circumference of the base body, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet portion in sequence, then enters into the multiple sub-airflow channels, and is discharged from the air outlet portion; the extension lengths of at least two sub-airflow channels are different.

8. The motor assembly according to claim 7, characterized in that The third air flow channel is located at the outer side of the base body facing away from the motor housing, and the extension length of the sub-air flow channel close to the air outlet is greater than the extension length of the sub-air flow channel away from the air outlet.

9. A motor assembly, characterized in that: include: A motor housing including a first airflow channel having an exhaust port; The muffler cover comprises a cylindrical base having a containing space, wherein the base is provided with a plurality of walls, and the walls protrude from the surface of the base; The base is sleeved on the outer periphery of the motor housing through the accommodating space, and the exhaust port is communicated with the accommodating space; A third airflow channel is formed between adjacent walls, the first airflow channel and the third airflow channel are interconnected, the third airflow channel is provided with an air inlet, an air outlet, and at least two sub-airflow channels that are arranged between the air inlet and the air outlet and are interconnected, the extension directions of the adjacent sub-airflow channels are different, at least one sub-airflow channel extends along the circumference of the base body, the airflow discharged from the exhaust port passes through the accommodating space and the air inlet in sequence, enters into the plurality of sub-airflow channels, and is discharged from the air outlet; The muffler cover is an integrally formed structure.

10. The motor assembly according to claim 1, 2, 5, 6, 7 or 9, characterized in that: The first airflow channel allows the airflow to flow in the accommodating space along a first direction after passing through the exhaust port; The base body includes a first base surface and a second base surface, the first base surface faces away from the motor housing, and the second base surface faces the motor housing, at least part of the wall body is arranged on the first base surface to form the third air flow channel on the first base surface, at least one air inlet portion communicates 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; After passing through the air inlet, the airflow is guided out from the air outlet along a second direction, wherein along the axial direction of the base body, the first direction is opposite to the second direction.

11. The motor assembly according to claim 10, characterized in that In the axial direction of the base body, an axial interval is provided between the air inlet portion and the air outlet.

12. The motor assembly according to claim 11, characterized in that In the axial direction of the base, at least one of the air inlet and one of the air outlet are respectively arranged at two ends of the base.

13. The motor assembly according to claim 11, characterized in that Along the radial direction of the base body, the exhaust port has an orthographic projection on the second base surface of the base body, and along the axial direction of the base body, the orthographic projection of the exhaust port on the second base surface is located between the air inlet and the air outlet.

14. The motor assembly according to claim 10, characterized in that The air inlet portion includes an air vent which is radially penetrated through the base body and is arranged on the base body.

15. The motor assembly according to claim 1, 2, 5, 6, 7 or 9, characterized in that: Along the axial direction of the base, the base includes a first end and a second end that are oppositely arranged, the air outlet is arranged at the second end, and the base includes a vent hole that connects the first air flow channel and the third air flow channel.

16. The motor assembly according to claim 15, characterized in that The base has a first area and two second areas. Along the axial direction of the base, one second area is respectively arranged on both sides of the first area. The first area is arranged corresponding to the exhaust port of the first air flow channel.

17. The motor assembly according to claim 16, characterized in that The aperture of the ventilation hole arranged in the first area is larger than the aperture of the ventilation hole arranged in the second area.

18. The motor assembly according to claim 16, characterized in that The total opening area of ​​the plurality of vent holes in the second region near the first end is S1, and the total opening area of ​​the plurality of vent holes in the second region near the second end is S2, wherein S2≤S1.

19. The motor assembly according to claim 1, 2, 7 or 9, characterized in that: In the third air flow channel, an extending direction of at least one of the sub-air flow channels is the same as the axial direction of the base.

20. The motor assembly according to claim 1, 2, 7 or 9, characterized in that In the third air flow channel, an extending direction of at least one of the sub-air flow channels is different from a circumferential direction of the base.

21. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein: The base body comprises 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, the wall body is arranged on the second base surface, and the third air flow channel is arranged on the inner side of the base body facing the motor housing; or, The base includes a first base surface and a second base surface, the first base surface faces away from the motor housing, and the second base surface faces the motor housing, the wall body is arranged on the first base surface and the second base surface, and the third air flow channel is arranged on the outer side of the base facing away from the motor housing and the inner side of the base facing the motor housing.

22. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein: The wall body comprises a plurality of first sub-wall bodies and a plurality of second sub-wall bodies. Along the radial direction of the base body, the extension length of the first sub-wall body is greater than the extension length of the second sub-wall body.

23. The motor assembly of claim 1, 2, 5, 6, 7 or 9, wherein: The motor assembly also 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 outside of the first housing, the first air flow channel is formed between the first housing and the second housing, the first housing has a accommodating chamber, and the motor body is connected to the first housing.

24. The motor assembly according to claim 23, characterized in that The first shell has a boss, the boss is arranged facing the exhaust port of the first air flow channel, and there is a distance between the boss and the exhaust port of the first air flow channel.

25. The motor assembly according to claim 23, characterized in that The motor body includes a rotor and a stator. The stator and at least part of the rotor are arranged in the accommodating chamber. The stator contacts the inner wall of the first shell. The part of the first shell on which the stator is mounted and fixed is arranged near the exhaust port of the first airflow channel.

26. The motor assembly according to claim 25, characterized in that The motor assembly further includes an air guide cover, wherein the air guide cover is disposed at one end of the second housing, the air guide cover has a first air inlet, and the first air flow channel is connected to the first air inlet; The motor body also includes an impeller, which is arranged in the air guide cover. The rotor passes through the first shell, and the impeller is connected to the rotor. The rotor is used to drive the impeller to rotate so that the airflow is introduced into the first air flow channel after passing through the first air inlet.

27. The motor assembly according to claim 26, characterized in that The motor housing also includes a stator wheel, which includes a wheel body and a plurality of blades. The wheel body is arranged between the first housing and the impeller along the axial direction of the rotor, the wheel body is coaxial with the impeller, and the wheel body is fixedly connected to the first housing. The plurality of blades are arranged between the wheel body and the second housing at intervals along the circumference of the wheel body, wherein an air duct is provided between adjacent blades, and the air duct is connected to the first air flow channel and the first air inlet, so that the air flow sucked by the impeller enters from the first air inlet, flows through the air duct, and is discharged from the exhaust port 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 arranged on the side of the base body facing the motor housing, the first airflow channel, the second airflow channel and the third airflow channel are connected, and along the radial direction of the base body, the maximum depth of the third airflow channel is A, and the maximum depth of the second airflow channel is B, wherein B / 3≤A≤B.

29. A cleaning device, characterized in that: include: The motor assembly according to any one of claims 1 to 28; A motor cover, wherein the motor assembly is arranged in the motor cover, and the motor cover includes a second air inlet and a main air outlet, the second air inlet is connected to the first air flow channel, and the air outlet of the third air flow channel is connected to the main air outlet.

30. The cleaning device according to claim 29, characterized in that The airflow is discharged along a first direction after passing through the exhaust port, and the first direction is the same as the axial direction of the base.

31. The cleaning device according to claim 30, characterized in that The base includes a first base surface and a second base surface, the first base surface faces the motor cover, and the second base surface faces away from the motor cover. The wall body is arranged on the first base surface, and at least a part of the wall body abuts against the motor cover. Along the axial direction of the base, the base includes a first end and a second end that are arranged opposite to each other, and at least one air inlet is arranged close to the first end. The cavity formed between the motor cover and the base is connected with the accommodating space in the base through the air inlet. The motor cover is sealed and connected to the first end. The airflow discharged along the first direction after passing through the exhaust port enters into the third airflow channel through the air inlet, and is discharged to the air outlet along the second direction, wherein the first direction is opposite to the second direction.

32. The cleaning device according to claim 29, characterized in that Along the radial direction of the base, there is a spacing distance L1 between the base and the motor cover; The width of the third air flow channel is W1, and the extension length of the third air flow channel is H. When 5mm≤W1≤1 / 2×L1≤1 / 4×H≤20mm, and along the first direction, when L1 increases, W1 decreases.

33. The cleaning device according to claim 29, characterized in that Along the radial direction of the base, there is a spacing distance L1 between the base and the motor housing, and there is a spacing distance L2 between the top surface of the wall and the motor cover. In the longitudinal section of the motor cover and the base along the axis of the base, the angle between the outer surface of the base and the inner wall of the motor cover is α, and the angle between the top surface of the wall and the inner wall of the motor cover is β, wherein 45°≥α≥2β≥20°, and along the first direction, both L1 and L2 gradually increase or gradually decrease.

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