Motor cover for vacuum cleaner, motor module of vacuum cleaner, and vacuum cleaner

Disclosed are a motor cover for a vacuum cleaner, a motor module of a vacuum cleaner, and a vacuum cleaner. The motor cover has an inlet and an outlet, the motor cover is configured to mount an electric blower, and an air inlet end of the electric blower is configured to be disposed towards the inlet; the motor cover is provided with a plurality of flow guiding channels therein, and the plurality of flow guiding channels are sequentially communicated; one of the flow guiding channels is communicated with an air outlet end of the electric blower, and another flow guiding channel is communicated with the outlet; at least two of the plurality of flow guiding channels are arranged along an axial direction of the electric blower and guide airflow along a circumferential direction of the electric blower.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present application is based on and claims priority to Chinese patent application number 201811645789.0, filed on Dec. 29, 2018, the entire disclosure of which is hereby incorporated by reference.

FIELD

The present disclosure relates to a field of vacuum cleaner apparatuses, and more particularly to a motor cover for a vacuum cleaner, a motor module of a vacuum cleaner, and a vacuum cleaner.

BACKGROUND

At present, sweeping robots are more and more popular among young consumers due to their high degree of intelligence and flexibility. A core power module of the sweeping robot is usually composed of an electric blower module and a duct system. In order to reduce vibration and airflow noise generated during operation of the electric blower, most sweeping robots employ a combination of a volute and a cushion to reduce overall noise. The motor volute can improve the efficiency of the electric blower, and the cushion can reduce the amount of vibration radiated from the motor to the casing. Some robots extend airflow length by designing flow channels in the body, to achieve a purpose of noise reduction.

In motor modules of existing vacuum cleaners, motor cover schemes for reducing motor noise mainly include a motor cover structure in a horizontal vacuum cleaner. In this motor cover scheme, the motor is arranged in a center position inside the motor cover; the motor cover is provided with a plurality of layers of airflow partition plates around the motor, and flow guiding channels are formed among the different partition plates; inner and outer flow guiding channels can be connected in series by perforating the partition plates in different positions. The inner and outer partition plates are separated by baffles, to force the airflow to flow around the flow guiding channels, to achieve purposes of extending the air flow path and reducing noise.

In addition, there are some noise-reduction motor cover structures that are applied to cleaning robots. In the motor cover schemes, the motor is arranged in a middle portion of the motor cover, and airflow partition plates are arranged at the periphery, therefore the airflow is forced to flow out from an outlet, and after encountering the surface of the motor cover, the airflow turns and flows to the rear of the motor cover, to extend the air duct; in one embodiment, the airflow partition plates are arranged in a spiral shape to extend the air flow channel.

In one embodiment n, the arrangement of the plurality of layers of airflow partition plates in the motor cover scheme of the horizontal vacuum cleaner causes a large transverse dimension, which occupies more internal space of the vacuum cleaner. In the motor cover schemes of cleaning robots, the flow guiding channels of the motor cover are arranged above the motor air outlet, which makes it difficult for the motor cover to meet a short casing requirement for the sweeping robot in the height direction.

SUMMARY

To this end, the present disclosure proposes a motor cover for a vacuum cleaner, which has a better noise reduction effect and has smaller longitudinal and transverse dimensions.

The present disclosure also aims to propose a motor module of a vacuum cleaner having the above motor cover.

The present disclosure also aims to propose a vacuum cleaner having the above motor module.

The motor cover according to embodiments of the present disclosure has an inlet and an outlet. The motor cover is configured to mount an electric blower, and an air inlet end of the electric blower is configured to be disposed towards the inlet. The motor cover is provided with a plurality of flow guiding channels therein, and the plurality of flow guiding channels are sequentially communicated. One of the flow guiding channels is communicated with an air outlet end of the electric blower, and another flow guiding channel is communicated with the outlet. At least two of the plurality of flow guiding channels are arranged along an axial direction of the electric blower and guide airflow along a circumferential direction of the electric blower.

For the motor cover according to the embodiments of the present disclosure, by arranging at least the flow guiding channels along the axial direction of the electric blower, the flow path is extended, and the noise is reduced. At the same time, the space in a height direction of the electric blower is fully utilized, so that the dimension of the motor cover in the height direction is reduced to some extent.

In some embodiments, the plurality of flow guiding channels are all annular, and the plurality of flow guiding channels are sequentially arranged along the axial direction of the electric blower; in two flow guiding channels at both ends in the axial direction of the electric blower, an inner wall of one flow guiding channel is provided with a first communication opening for communication with the air outlet end of the electric blower, and an outer wall of the other flow guiding channel is provided with the outlet; a second communication opening is provided between adjacent two flow guiding channels.

In some embodiments, an airflow entry point of each flow guiding channel is arranged centrally symmetrically with an airflow outflow point thereof in a circumferential direction.

In some embodiments, an axis of the first communication opening defines an angle with a radius line of the electric blower at the first communication opening.

In some embodiments, the motor cover comprises: a motor cover upper lid formed in a lid shape with an open lower end, the motor cover upper lid being provided with an inner wall panel, the inner wall panel being formed into a cylindrical shape with an open lower end, and the inner wall panel being provided with the first communication opening; a motor cover lower lid formed in a lid shape with an open upper end, the inlet and the outlet being disposed in a bottom wall and a peripheral wall of the motor cover lower lid respectively, and the motor cover lower lid being engaged with the motor cover upper lid; and a motor cover middle lid formed as a ring shape, the motor cover middle lid being interposed between the motor cover upper lid and the motor cover lower lid, an inner edge of the motor cover middle lid being connected to a lower edge of the inner wall panel, and the motor cover middle lid being provided with the second communication opening. A part above the motor cover middle lid and located outside the inner wall panel defines an upper flow guiding channel, and a part below the motor cover middle lid and located outside the electric blower defines a lower flow guiding channel.

In some specific embodiments, a plurality of the first communication openings is provided and penetrates the inner wall panel in a downward direction.

The motor module according to embodiments of the present disclosure includes: a motor cover configured as the motor cover described above; an electric blower provided in the motor cover, and the electric blower comprises a blower cover, an impeller, and a motor, the impeller is disposed in the blower cover, the motor is fixed on the blower cover, a motor shaft of the motor is connected to the impeller, and the blower cover has a first end disposed towards the inlet of the motor cover and a second end communicated with one flow guiding channel of the motor cover; and a sealing member provided between the motor cover and the electric blower.

In some embodiments, at least one flow guiding channel is defined between an outer wall of the blower cover and an inner wall of the motor cover.

In some specific embodiments, when the motor cover comprises a motor cover upper lid, a motor cover middle lid, and a motor cover lower lid, and the motor cover upper lid is provided with a cylindrical inner wall panel, the blower cover is spliced to an axial side of the inner wall panel; the sealing member comprises a first seal ring and a second seal ring, the first seal ring is disposed among the blower cover, the motor cover middle lid, and the inner wall panel, and the second seal ring is disposed between the blower cover and the motor cover lower lid.

In some embodiments, the motor is configured as an outer rotor type motor, the motor extends out of an end of the blower cover, and the motor cover is provided with a protection plate that is fitted over the outside of the motor.

In some embodiments, a sound absorbing member is provided within the motor cover.

The vacuum cleaner according to embodiments of the present disclosure includes a housing, and a motor module configured as the motor module described above.

For the vacuum cleaner according to the embodiments of the present disclosure, since the vacuum cleaner has the motor module described above, the transverse and height dimensions of the whole machine are reduced under the premise of reducing the working noise.

In some embodiments, the vacuum cleaner is configured as a cleaning robot, and the cleaning robot further comprises a walking device configured to drive the cleaning robot to walk.

REFERENCE NUMERALS

DETAILED DESCRIPTION OF THE DISCLOSURE

Embodiments of the present disclosure will be described in detail and examples of the embodiments will be illustrated in the accompanying drawings, where same or similar reference numerals are used to indicate same or similar members or members with same or similar functions. The embodiments described herein with reference to the drawings are explanatory, which aim to illustrate the present disclosure, but shall not be construed to limit the present disclosure.

In the specification, it is to be understood that terms such as “central,” “longitudinal,” “transverse,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description, and do not indicate or imply that the referred devices or elements must have a particular orientation or be constructed and operated in a particular orientation. Thus, these terms shall not be constructed to limit the present disclosure. In addition, the feature defined with “first” and “second” may comprise one or more of this feature. In the description of the present disclosure, the term “a plurality of” means two or more than two, unless specified otherwise.

A motor cover1for a vacuum cleaner according to embodiments of the present disclosure will be described with reference toFIGS. 1 to 4.

As illustrated inFIG. 2, the motor cover1according to the embodiments of the present disclosure has an inlet131and an outlet132. The motor cover1is adapted to mount an electric blower2, and an air inlet end of the electric blower2is adapted to be disposed towards the inlet131. The motor cover1is provided with a plurality of flow guiding channels4, and the plurality of flow guiding channels4are sequentially communicated. One of the flow guiding channels4is communicated with an air outlet end of the electric blower2, and another flow guiding channel4is communicated with the outlet132. At least two of the plurality of flow guiding channels4are arranged along an axial direction of the electric blower2and guide airflow along a circumferential direction of the electric blower2.

It could be understood that, in the embodiments of the present disclosure, the airflow enters the motor cover1from the inlet131of the motor cover1, enters through the air inlet end of the electric blower2, then flows out from the air outlet end of the electric blower2, and finally enters the flow guiding channels4. Since at least two flow guiding channels4are provided in the present disclosure, and the two flow guiding channels4are arranged along the axial direction of the electric blower2, the motor cover1according to the embodiments of the present disclosure has a smaller transverse dimension compared to spiral guiding grooves in the related art. Furthermore, the direction of the airflow in the flow guiding channels4is guided along the axial direction of the electric blower2, that is, the projection of the flow guiding channels4on the vertical plane and the projection of the electric blower2on the vertical plane have an overlapped area, to fully facilitate the use of the height of the electric blower2to form a plurality of flow guiding channels4. Compared with the related art that the motor cover1is disposed above the air outlet of the motor22, the motor cover1according to the embodiments of the present disclosure has a smaller height. Therefore, the motor cover1according to the embodiments of the present disclosure has a smaller height and width under the premise of ensuring noise reduction, to achieve a miniaturized design of the vacuum cleaner.

For the motor cover1according to the embodiments of the present disclosure, by arranging at least the flow guiding channels4along the axial direction of the electric blower2, the flow path is extended, and the noise is reduced. At the same time, the space in a height direction of the electric blower2is fully utilized, so that the dimension of the motor cover1in the height direction is reduced to some extent.

It should be noted that in the present disclosure, the motor cover1can be in various shapes, for example, a square, a circle or an oval, etc., and the specific shape of the motor cover1is not limited herein. The specific shape of the motor cover1can be designed based on actual needs. At the same time, the inlet131and the outlet132of the motor cover1may be formed into various shapes such as a circle, a square, or a grid, and the inlet131and the outlet132of the motor cover1are not specifically limited. The specific shapes of the inlet131and the outlet132of the motor cover1can be selected based on actual needs.

In some embodiments, the plurality of flow guiding channels4are all annular, and the plurality of flow guiding channels4are sequentially arranged along the axial direction of the electric blower2. In two flow guiding channels4at both ends in the axial direction of the electric blower2, an inner wall of one flow guiding channel is provided with a first communication opening1111for communication with the air outlet end of the electric blower2, and an outer wall of the other flow guiding channel is provided with the outlet132. A second communication opening121is provided between the adjacent two flow guiding channels4. Therefore, when the airflow flows out from the air outlet end of the electric blower2, it can enter one flow guiding channel4through the first communication opening1111, and then enter other flow guiding channels4sequentially through a plurality of second communication openings121. In such a way, it is ensured that the airflow travels a longer distance inside the motor cover1, which is advantageous for noise reduction of the vacuum cleaner. In one embodiment, it should be noted here that since the first communication opening1111and the second communication opening121are both used for passage of the airflow, the first communication opening1111and the second communication opening121can be formed into any shape that facilitates the passage of the airflow. The specific shapes of the first communication opening1111and the second communication opening121are not limited herein.

It should be additionally noted that when the flow guiding channel4has a circular cross section, the electric blower2can be disposed at the circle center of the flow guiding channel4, and can also be eccentrically disposed. When the electric blower2is eccentrically disposed with respect to the flow guiding channel4, a blower cover21of the electric blower2can be in contact with the motor cover1, and at this time, the airflow no longer passes from both sides of the electric blower2, but passes from a single side, to create a diffuser structure similar to a volute, and reducing noise to a certain extent.

In some embodiments, as shown inFIG. 4, an airflow entry point of each flow guiding channel4is arranged centrally symmetrically with an airflow outflow point thereof in a circumferential direction. Thus, the distance and time when the airflow flows in each flow guiding channel4can be extended to a maximum extent, to improve the noise reduction effect of the flow-guiding channel4. In one embodiment, the airflow entry point and the airflow outflow point of each of the flow guiding channels4may be located at any two positions in the circumferential direction, and are not limited to the centrally symmetrical arrangement. In the actual applications, the airflow entry point and the airflow outflow point of each flow guiding channel4can be specifically selected based on actual needs.

In some embodiments, an axis of the first communication opening1111defines an angle with a radius line of the electric blower2at the first communication opening1111. Thus, it is possible to enter the flow guiding channel4along a tangential direction from the first communication opening1111, which reduces the possibility of turbulence at the first communication opening1111to some extent, to reduce noise.

In some embodiments, as shown inFIGS. 1-2, the motor cover1includes a motor cover upper lid11, a motor cover lower lid13, and a motor cover middle lid12. The motor cover upper lid11is formed in a lid shape with an open lower end, and the motor cover upper lid11is provided with an inner wall panel111. The inner wall panel111is formed into a cylindrical shape with an open lower end, and the inner wall panel111is provided with the first communication opening1111. The motor cover lower lid13is formed in a lid shape with an open upper end, and the inlet131and the outlet132are disposed in a bottom wall and a peripheral wall of the motor cover lower lid13respectively. The motor cover lower lid13is engaged with the motor cover upper lid11. The motor cover middle lid12is formed as a ring shape, and the motor cover middle lid12is interposed between the motor cover upper lid11and the motor cover lower lid13. An inner edge of the motor cover middle lid12is connected to a lower edge of the inner wall panel111, and the motor cover middle lid12is provided with the second communication opening121. A part above the motor cover middle lid12and located outside the inner wall panel111defines an upper flow guiding channel41, and a part below the motor cover middle lid12and located outside the electric blower2defines a lower flow guiding channel42.

It could be understood that when the airflow enters the inside of the motor cover1from the inlet131, the airflow first enters a chamber inside the inner wall panel111, where the electric blower2is located, then enters the upper flow guiding channel41through the first communication opening1111, enters the lower flow guiding channel42through the second communication opening121after flowing a distance in the upper flow guiding channel41, and finally flows out of the motor cover1through the outlet132after flowing a distance in the lower flow guiding channel42. Thus, the flow path of the airflow inside the motor cover1is greatly prolonged, and the noise reduction effect of the motor cover1is improved. In addition, according to the above description, the motor cover upper lid11, the motor cover lower lid13, and the motor cover middle lid12define the flow guiding channels4, so that the motor cover1itself is used as a partition plate for the airflow, reducing the number of airflow partition plates, simplifying the structure of the motor cover1, and decreasing the transverse size of the motor cover1.

In one embodiment, as shown inFIG. 4, the first communication opening1111and the second communication opening121are staggered in the circumferential direction, to prevent the airflow from entering the lower flow guiding channel42through the second communication opening121directly after it enters the upper flow guiding channel41through the first communication opening1111from the air outlet end of the electric blower2, which may otherwise cause a poor noise reduction effect.

In one embodiment, the motor cover upper lid11and the motor cover middle lid12are snap-connected, and the motor cover middle lid12and the motor cover lower lid13are snap-connected, to ensure the stability of the connection, and to some extent absorbing vibration generated by the rotation of the motor22, to further improve the noise reduction capability of the motor cover1. In one embodiment, in other embodiments of the present disclosure, the connection between the motor cover upper lid11and the motor cover middle lid12, and the connection between the motor cover middle lid12and the motor cover lower lid13are not limited to the snap connection. It can be a screw connection, a rivet connection, or the like.

In one embodiment, it should be noted that, in the embodiments of the present disclosure, a plurality of the motor cover upper lids11can be sequentially stacked to improve the noise reduction effect of the motor cover1. Further, a layer of the inner wall panel111or a plurality of layers of the inner wall panels111can be provided, such that the upper flow guiding channel41is formed in a spiral shape, to improve the noise reduction effect of the motor cover1. For the same reason, a plurality of layers of airflow partition plates can be provided on an end of the motor cover middle lid12towards the motor cover lower lid13, such that the lower flow guiding channel42is also formed in a spiral shape, to improve the noise reduction effect of the motor cover1.

In some specific embodiments, as shown inFIG. 3, a plurality of the first communication openings1111is provided and penetrates the inner wall panel111in the downward direction. Therefore, it is ensured that the airflow at an air outlet section of the electric blower2can stably enter the upper flow guiding channel41, and the first communication openings1111penetrate the inner wall panel111in the downward direction, which is advantageous for reducing wind resistance and decreasing noise.

A motor module100of a vacuum cleaner according to embodiments of the present disclosure will now be described with reference toFIGS. 3 to 4.

As shown inFIG. 3, the motor module100of the vacuum cleaner according to the embodiments of the present disclosure includes a motor cover1, an electric blower2, and a first sealing member313. The motor cover1is a motor cover1described above. The electric blower2is disposed inside the motor cover1. The electric blower2includes a blower cover21, an impeller, and a motor22. The impeller is disposed in the blower cover21, and the motor22is fixed on the blower cover21. A motor shaft of the motor22is connected to the impeller. The blower cover21has a first end disposed towards the inlet131of the motor cover1, and a second end communicated with one flow guiding channel4of the motor cover1. The first sealing member313is disposed between the motor cover1and the electric blower2.

For the motor module100of the vacuum cleaner according to the embodiments of the present disclosure, since the motor module has the motor cover1described above, the transverse dimension and height dimension of the motor module100are reduced under the premise of reducing the operating noise.

In some embodiments, as shown inFIG. 3, at least one flow guiding channel4is defined between an outer wall of the blower cover21and an inner wall of the motor cover1. Therefore, the flow guiding channel4is defined between an outer wall of the air duct and the inner wall of the motor cover1, so that the airflow partition plates inside the motor module are omitted, to simplify the structure of the motor module, and reducing the transverse dimension of the motor module. In one embodiment, it should be noted here that in some embodiments of the present disclosure, a plurality of layers of airflow partition plates are provided between the outer wall of the blower cover21and the inner wall of the motor22, such that the flow guiding channels4are all formed into a spiral shape. This further enhances the noise reduction effect, to reduce the operating noise of the motor module.

In some specific embodiments, as shown inFIG. 3, when the motor cover1includes a motor cover upper lid11, a motor cover middle lid12, and a motor cover lower lid13, and the motor cover upper lid11is provided with a cylindrical inner wall panel111, the blower cover21is spliced to an axial side of the inner wall panel111. The sealing member3includes a first seal ring31and a second seal ring32. The first seal ring31is disposed among the blower cover21, the motor cover middle lid12and the inner wall panel111, and the second seal ring32is disposed between the blower cover21and the motor cover lower lid13. It could be understood that the first seal ring31and the second seal ring32can ensure the sealing effect at the connection, and can absorb noise generated by the motor cover upper lid11, the motor cover middle lid12, the blower cover21, and the motor cover lower lid13due to the rotation of the motor22, to further reduce the operating noise of the entire motor module.

In some embodiments, as shown inFIG. 2, the motor22is an outer rotor type motor, the motor22extends out of an end of the blower cover21, and the motor cover1is provided with a protection plate112that is fitted over the outside of the motor22. It could be understood that the presence of the protection plate112can not only reduce the damage rate of the motor22, but also prolong the circulation path of the airflow in the motor cover1to a certain extent, to better reduce the operating noise of the motor module. It should be noted that the protection plate112mainly functions to protect the motor22, that is, further extend the circulation path of the airflow, so that the specific shape of the protection plate112is not limited, and the shape and size of the protection plate112can be selected based on actual needs. In addition, in the embodiments of the present disclosure, a layer of the protection plate112or a plurality of layers of the protection plates112can be provided, and when the plurality of layers of the protection plates112are provided, the noise reduction effect of the motor cover1is better.

In addition, according to the foregoing, when the motor cover1includes the motor cover upper lid11, the motor cover middle lid12, and the motor cover lower lid13, the part above the motor cover middle lid12and located outside the inner wall panel111defines the upper flow guiding channel41, and the part below the motor cover middle lid12and located outside the electric blower2defines the lower flow guiding channel42. In the case that the motor22is configured as an outer rotor type motor, the height of the upper flow guiding channel41is generated by a height difference between the impeller of the motor22and an outer rotor of the motor22, and the motor cover upper lid11can be closer to the outer rotor of the motor22, so the upper part of the motor cover1is only slightly higher than the outer rotor of the motor22. The motor cover lower lid13is connected to the blower cover21through the sealing member3, and the height difference between them is small. This solution ensures that the height of the motor cover1is not much different that of the body of the motor22, such that the motor cover1can be installed in vacuum cleaners with limited installation space in the height direction (such as sweeping robots), to realize the purpose of noise reduction.

In some embodiments, a sound absorbing member is provided within the motor cover1. Thus, the noise reduction effect of the motor cover1can be improved. In one embodiment, it should be noted herein that the function of the sound absorbing member is to improve the noise reduction effect, the sound absorbing member can be formed as a sound absorbing material of any shape, and the specific shape and material of the sound absorbing member are not limited herein.

A vacuum cleaner1000according to embodiments of the present disclosure includes a housing200and a motor module300as described above.

For the vacuum cleaner1000according to the embodiments of the present disclosure, since the vacuum cleaner has the motor module100described above, the transverse and height dimensions of the whole machine are reduced under the premise of reducing the working noise.

In some embodiments, the vacuum cleaner1000is a cleaning robot, and the cleaning robot further includes: a walking device that drives the cleaning robot to walk. It should be noted that, in the embodiments of the present disclosure, the walking device is mainly used to drive the cleaning robot to walk to facilitate the cleaning, and the specific type and structure of the walking device are not limited herein.

Embodiment

As shown inFIG. 1, the vacuum cleaner1000according to the present embodiment includes a motor module100, a housing200and an air duct member300. The air duct member300and the motor module100are located inside the housing200. The motor module100is located above the air duct member300and connected to the air duct member300, and an air duct seal ring310is provided between the motor module100and the air duct member300.

The motor module100includes a motor cover1, an electric blower2, and a sealing member3. The motor cover1is a motor cover1as described above, and the electric blower2is disposed in the motor cover1. The electric blower2includes a blower cover21, an impeller, and a motor22. The impeller is disposed in the blower cover21, the motor22is fixed on the blower cover21, and a motor shaft of the motor22is connected to the impeller. The blower cover21has a first end disposed towards the inlet131of the motor cover1, and a second end communicated with one flow guiding channel4of the motor cover1. The sealing member3is disposed between the motor cover1and the electric blower2.

The motor cover1has an inlet131and an outlet132. The motor cover1is adapted to mount the electric blower2, and an air inlet end of the electric blower2is adapted to be disposed towards the inlet131. The motor cover1includes a motor cover upper lid11, a motor cover lower lid13, and a motor cover middle lid12. The motor cover upper lid11is formed in a lid shape with an open lower end, and the motor cover upper lid11is provided with an inner wall panel111. The inner wall panel111is formed into a cylindrical shape with an open lower end, and the inner wall panel111is provided with a first communication opening1111. The motor cover lower lid13is formed in a lid shape with an open upper end, and the inlet131and the outlet132are disposed in a bottom wall and a peripheral wall of the motor cover lower lid13respectively. The motor cover lower lid13is engaged with the motor cover upper lid11. The motor cover middle lid12is formed as a ring shape, and the motor cover middle lid12is interposed between the motor cover upper lid11and the motor cover lower lid13. An inner edge of the motor cover middle lid12is connected to a lower edge of the inner wall panel111, and the motor cover middle lid12is provided with a second communication opening121. A part above the motor cover middle lid12and located outside the inner wall panel111defines an upper flow guiding channel41, and a part below the motor cover middle lid12and located outside the electric blower2defines a lower flow guiding channel42. The first communication opening1111and the second communication opening121are staggered by 180° in the circumferential direction. The sealing member3includes a first seal ring31and a second seal ring32. The first seal ring31is disposed among the blower cover21, the motor cover middle lid12, and the inner wall panel111, while the second seal ring32is disposed between the blower cover21and the motor cover lower lid13.

The motor module of the vacuum cleaner of this embodiment provide the following functionality:

1. The existing sweeping robots do not use the motor cover1for noise reduction. This embodiment proposes a practical noise reduction scheme for motor modules of the sweeping robots.

2. With the split structure of the motor cover1, the air flow path generated by the motor22is prolonged, and the airflow noise is reduced.

3. The motor cover1is vertically divided into two flow guiding channels4by the motor cover middle lid12, so that the motor cover1can achieve the purpose of extending the length of the air duct without adding any extra guiding baffles in the transverse direction, reduce the transverse dimension of the motor cover1, and increase the likelihood of applying the solution to the sweeping robots.

4. In the height direction of the motor cover1, the height difference between the outer rotor of the motor22and the impeller of the motor22is fully utilized to form the flow guiding channel4, so the motor cover1only needs to be slightly higher than the outer rotor of the motor22. Hence, the solution can better control the height dimension of the motor cover1.

5. The sealing member3in the motor cover1is simultaneously used for vibration isolation and sealing, to further reduce the working noise.