CN118235992A - Motor device and cleaning equipment - Google Patents

Abstract

The present invention relates to a motor device and a cleaning apparatus. The motor device comprises a motor, a flow guide piece, a first cover body and an impeller assembly; a cooling fan is arranged in the motor; the surface of the flow guiding piece is provided with a containing groove, and the motor part is contained in the containing groove; the air guide piece covers the first cover body, and one side of the air guide piece, which is away from the motor, and the first cover body enclose a containing cavity; the motor shaft of the motor penetrates through the guide piece and extends into the accommodating cavity, the impeller assembly is positioned in the accommodating cavity and is partially connected to the motor shaft, and the accommodating cavity is respectively communicated with the outside and the gas filtering cavity of the cleaning equipment; at least part of the outer surface of the motor and the groove wall of the accommodating groove jointly define a cooling air inlet channel communicated with the interior of the motor, and at least part of the groove wall of the accommodating groove is configured into a first diversion cambered surface so as to guide air flow flowing in the cooling air inlet channel. The motor device has low noise during operation.

Description

Motor device and cleaning equipment

Technical Field

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

Background

With the improvement of life quality, the use of dust collectors is becoming more common. Among them, a more common wet and dry cleaner is a cleaning device capable of sucking dust and sewage. The motor device of the wet and dry dust collector is generally provided with two air channels, one is a motor heat dissipation air channel, the other is a dust collector main air channel, the main air channel is used for absorbing dust and water, and the heat dissipation air channel is used for sucking cooling air to cool the motor. The heat dissipation air channel can be used for air intake from the top of the motor, flows through the inside of the motor and flows out from the bottom of the motor after full heat exchange, sound absorption parts such as sound absorption partition plates or sound absorption sponge are usually arranged around the motor and in the heat dissipation air channel in order to reduce noise in the heat dissipation air channel as much as possible, but the noise is still larger when the motor device runs due to the fact that the sound absorption parts are only used for realizing the effective noise reduction; in addition, since the wind loss in the cooling duct tends to be large, this also results in an increase in power consumption.

Disclosure of Invention

Based on this, it is necessary to provide a motor device and a cleaning apparatus for solving the problem of the prior art that the motor device has a large operation noise.

An embodiment of the present application provides a motor apparatus, including a motor, a flow guiding member, a first cover body, and an impeller assembly;

A cooling fan is arranged in the motor;

the surface of the flow guiding piece is provided with a containing groove, and the motor part is contained in the containing groove;

The air guide piece covers the first cover body, and one side of the air guide piece, which is away from the motor, and the first cover body enclose a containing cavity;

The motor shaft of the motor penetrates through the guide piece and extends into the accommodating cavity, the impeller assembly is positioned in the accommodating cavity and is partially connected to the motor shaft, and the accommodating cavity is respectively communicated with the outside and the gas filtering cavity of the cleaning equipment;

At least part of the outer surface of the motor and the groove wall of the accommodating groove jointly define a cooling air inlet channel communicated with the interior of the motor, and at least part of the groove wall of the accommodating groove is configured into a first diversion cambered surface so as to guide air flow flowing in the cooling air inlet channel.

In one embodiment, the included angle between the tangent line of each point on the first diversion cambered surface and the axial direction of the motor shaft gradually increases from the bottom of the accommodating groove to the notch of the accommodating groove.

In one embodiment, the flow guide member includes a bottom plate and a side plate surrounding and attached to an outer edge of the bottom plate, the bottom plate and the side plate defining a receiving slot.

In one embodiment, the cooling air intake passage includes a continuous first passage section and second passage section;

The side plates and the side surfaces of the motor define a first channel section and the bottom plate and the bottom end surface of the motor define a second channel section.

In one embodiment, a first cooling air inlet is formed in the bottom end face, facing the bottom plate, of the motor, and the first cooling air inlet is located in the second channel section; and/or

And a second cooling air inlet is arranged on the side surface of the motor and close to the bottom end surface of the bottom plate, and the second cooling air inlet is positioned in the first channel section.

In one embodiment, a cooling air outlet is formed in a portion, outside the accommodating groove, of the motor, and the cooling air outlet is located at the side of the cooling fan.

In one embodiment, the motor device further comprises a second cover body, the second cover body is arranged on the end portion, deviating from the guide piece, of the motor in a covering mode, the cooling air outlet is covered in the second cover body, a second air outlet is formed in the second cover body, and the second air outlet is located on one side, deviating from the cooling air inlet channel, of the cooling air outlet.

In one embodiment, the first and second covers are each configured as a hollow structure having an opening;

The opening edge of the first cover body is provided with a connecting part extending to the radial inner side of the opening, the connecting part is connected to the opening edge of the second cover body, the connecting part is provided with a through hole, and the through hole forms an air inlet of the cooling air inlet channel.

In one embodiment, the second air outlet and the air inlet of the cooling air inlet channel are staggered with respect to each other in the circumferential direction of the motor.

In one embodiment, the outer side of the motor device is also covered with a shell, the shell is provided with a shell air inlet communicated with the interior of the shell, and the shell air inlet is communicated with the air inlet of the cooling air inlet channel; and/or

The motor device is characterized in that a shell is further covered on the outer side of the motor device, a shell air outlet communicated with the shell is formed in the shell, a second air outlet channel is formed in the shell, and two ends of the second air outlet channel are respectively communicated with the shell air outlet and the second air outlet.

In one embodiment, when the casing is provided with the casing air outlet, the casing air outlet is connected with a connecting pipe extending towards the second cover body, and one end of the connecting pipe, which is away from the casing air outlet, is connected with the second air outlet in a sealing manner.

In one embodiment, a first vibration isolator is provided between the inner edge of the connecting portion and the outer surface of the motor.

In one embodiment, the first vibration isolator is configured as a ring;

the inner annular surface of the first vibration isolator is abutted to the outer surface of the motor, the outer annular surface of the first vibration isolator is provided with a vibration isolator mounting groove, and the inner edge of the connecting part is clamped in the vibration isolator mounting groove.

In one embodiment, a first air outlet communicated with the accommodating cavity is formed in the first cover body; the impeller assembly is internally provided with a plurality of first air inlet channels communicated with the gas filtering chamber;

The flow guiding piece, the first cover body and the impeller assembly jointly define a first air outlet channel, and the first air outlet channel is respectively communicated with the first air inlet channel and the first air outlet;

At least part of the surface of the flow guiding piece, which is away from the first flow guiding cambered surface, is configured as a second flow guiding cambered surface so as to guide the air flow entering the first air outlet through the first air outlet channel.

In one embodiment, at least one of the first and second flow directing cambered surfaces is arranged around the circumferential whole circumference of the flow guiding member.

In one embodiment, the included angle between the tangent line of each point on the second diversion cambered surface and the axial direction of the motor shaft gradually increases from the bottom of the accommodating groove to the notch of the accommodating groove.

In one embodiment, a first air inlet used for communicating with the gas filtering cavity is formed in the first cover body;

the impeller assembly comprises an impeller cover, and a movable impeller and a fixed impeller which are covered in the impeller cover;

The movable impeller is rotatably connected with the motor shaft, and the fixed impeller is connected with the impeller cover;

The first air inlet channel is formed in the fixed impeller, and the movable impeller is used for generating airflow in the first air inlet channel under the drive of the motor shaft.

In one embodiment, the flow guiding member is fixed on the fixed impeller, and the air outlet of the first air inlet channel faces the second flow guiding cambered surface.

In one embodiment, the impeller cover has an air inlet, and a second vibration isolator is disposed between the air inlet edge of the impeller cover and the first air inlet edge.

In one embodiment, a vibration isolation gasket is disposed between the baffle and the first enclosure.

A second aspect of the embodiment of the present application provides a cleaning apparatus, including the above-mentioned motor device.

In one embodiment, the cleaning apparatus further comprises a support member, a gas filtering assembly and a dirt box, wherein the gas filtering assembly and the dirt box are arranged on the support member, the gas filtering chamber is arranged in the gas filtering assembly, the dirt box is communicated with the accommodating cavity of the motor device through the gas filtering chamber, an air outlet gap is defined between the surface of the dirt box, which is opposite to the surface of the support member, of the dirt box, a third air outlet channel is formed in the support member, one end of the third air outlet channel is communicated with the accommodating cavity, and the other end of the third air outlet channel is communicated with the air outlet gap.

In one embodiment, the third air outlet channel is provided with silencing cotton; and/or an air outlet of the third air outlet channel is provided with an air outlet grille.

In one embodiment, the support comprises a bottom support and a side support connected;

The bottom support is located at the bottom of the dirt box and has a first interval with the bottom of the dirt box, the side support is located at the side of the dirt box and has a second interval with the side wall of the dirt box, and the first interval and the second interval are communicated to form an air outlet gap.

In one embodiment, the air inlet of the third air outlet channel is provided with a guide plate to guide the air flow entering the third air outlet channel from the accommodating cavity.

The motor device and the cleaning equipment have the beneficial effects that:

The impeller assembly is positioned in the accommodating cavity formed by the guide piece and the first cover body, and part of the impeller assembly is connected to the motor shaft, so that the motor shaft can drive part of the impeller assembly to rotate when rotating, and the impeller assembly is used as a driving source for generating airflow flow in the accommodating cavity, namely, as a driving source of a main air duct of the dust collector; the accommodating cavity is respectively communicated with the outside and the gas filtering cavity of the cleaning equipment, and the gas filtered by the gas filtering cavity can enter the accommodating cavity under the driving of the driving source and is discharged to the outside.

On the other hand, the motor part is accommodated in the accommodating groove, and at least part of the outer surface of the motor and the groove wall of the accommodating groove jointly define a cooling air inlet channel communicated with the interior of the motor, so that when a cooling fan in the motor runs, cooling air entering the cooling air inlet channel through an air inlet of the cooling air inlet channel can cool the interior of the motor. In the process, the groove wall of the accommodating groove is at least partially formed into the first diversion cambered surface to guide the air flow flowing in the cooling air inlet channel, so that the wind resistance of the air flowing in the cooling air inlet channel can be reduced to a large extent, the wind noise is reduced, and the noise of the motor device in operation is reduced. In addition, the cooling air inlet channel is smooth, the guiding performance is good, the wind loss is reduced, and the power consumption is reduced.

Drawings

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

fig. 2 is a schematic structural diagram of a motor device according to an embodiment of the present application;

fig. 3 is a cross-sectional view of a motor apparatus according to an embodiment of the present application;

FIG. 4 is another angular cross-sectional view of a motor apparatus provided in an embodiment of the present application;

FIG. 5 is a further angular cross-sectional view of a motor apparatus according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a connection portion in a motor device according to an embodiment of the present application;

fig. 7 is a schematic view of another structure of a motor apparatus according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of a cleaning apparatus provided in an embodiment of the present application;

Fig. 9 is a schematic cross-sectional view of a support member in a cleaning apparatus according to an embodiment of the present application.

Reference numerals illustrate:

100. a motor device; 200. a cleaning device;

10. A motor; 11. a cooling fan; 12. a motor shaft; 13. a motor housing; 131. a first cooling air inlet; 132. a second cooling air inlet; 133. cooling the air outlet; 121. a first motor shaft section; 122. a second motor shaft section; 15. a motor body;

20. a flow guide; 21. a receiving groove; 211. a first diversion cambered surface; 212. a second diversion cambered surface; 213. a protruding portion; 22. a cooling air inlet channel; 221. a first channel segment; 222. a second channel segment; 23. a bottom plate; 24. a side plate; 25. vibration isolation sealing gaskets;

30. A first cover; 31. a receiving chamber; 32. a connection part; 321. a through hole; 322. a stop portion; 33. a first air inlet; 34. a first air outlet;

40. A gas filtration assembly; 41. a gas filtration chamber; 42. a floor brush assembly;

50. A second cover; 51. a first vibration isolator; 511. vibration isolator mounting grooves; 52. a second vibration isolator; 60. an impeller assembly; 61. a first air inlet channel; 62. an impeller is fixed; 621. a blade; 63. a moving impeller; 64. an impeller cover; 65. a second air outlet;

70. A housing; 71. an air inlet of the shell; 72. an air outlet of the shell; 721. a connecting pipe;

80. A dirt box; 81. an air outlet gap;

90. A support; 91. a third air outlet channel; 911. an air outlet grille; 912. a guide plate; 92. a bottom support; 921. a first interval; 93. a side support; 931. and a second interval.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

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

The motor apparatus and the cleaning device according to the embodiment of the present application are described below with reference to the drawings.

Fig. 1 is a schematic structural diagram of a cleaning device according to an embodiment of the present application.

Referring to fig. 1, a cleaning apparatus 200 is provided in an embodiment of the present application, and the cleaning apparatus 200 is described as a wet and dry cleaner, which is a cleaning apparatus capable of absorbing dust and sewage. The cleaning device 200 is similar to other devices and will not be described in detail herein.

Referring to fig. 1, the cleaning apparatus 200 includes a support 90, a floor brush assembly 42, and a motor device 100, a gas filtering assembly 40, and a dirt box 80 disposed on the support 90. Wherein a third air outlet passage (not shown) is configured in the support 90.

The floor brush assembly 42 is used for cleaning a surface to be cleaned, the generated dirt is filtered, the solid and most of the liquid are collected in the dirt box 80, and the gas-liquid mixed fluid passes through the gas filtering assembly 40, enters the motor device 100, and is discharged to the outside through the third air outlet channel.

The specific structure of each part will be described below.

Fig. 2 is a schematic structural diagram of a motor device according to an embodiment of the present application, and fig. 3 is a cross-sectional view of the motor device according to the embodiment of the present application.

Note that, in the present application, for convenience of explanation, the axial direction of the motor device is defined as the Z direction, the direction opposite to the air outlet direction of the motor device is defined as the Y direction, and the directions perpendicular to both the Z direction and the Y direction are defined as the X direction.

Referring to fig. 2 and 3, a motor apparatus 100 according to an embodiment of the present application includes a motor 10, a flow guide 20, a first housing 30, and an impeller assembly 60.

Wherein, the cooling fan 11 is arranged in the motor 10, the surface of the flow guiding piece 20 is provided with a containing groove 21, and part of the motor 10 is contained in the containing groove 21; the guide piece 20 covers the first cover 30, and a containing cavity 31 is enclosed by the side of the guide piece 20, which is away from the motor 10, and the first cover 30; the motor shaft 12 of the motor 10 penetrates through the guide piece 20 and extends into the accommodating cavity 31, the impeller assembly 60 is positioned in the accommodating cavity 31, the impeller assembly 60 is partially connected to the motor shaft 12, and the accommodating cavity 31 is respectively communicated with the outside and the gas filtering cavity 41 (shown in fig. 8) of the cleaning device 200; at least a portion of the outer surface of the motor 10 and the wall of the receiving groove 21 together define a cooling air inlet channel 22 communicating with the interior of the motor 10, and the wall of the receiving groove 21 is at least partially configured as a first diversion cambered surface 211 for guiding the air flow flowing in the cooling air inlet channel 22.

In the above-mentioned scheme, the impeller assembly 60 is located in the accommodating cavity 31 enclosed by the flow guiding element 20 and the first cover 30, and part of the impeller assembly 60 is connected to the motor shaft 12, so that the rotation of the motor shaft 12 can drive part of the structure of the impeller assembly 60 to rotate, so as to be used as a driving source for generating airflow flow in the accommodating cavity 31; since the accommodating chamber 31 is respectively communicated with the outside and the gas filtering chamber 41 of the cleaning device 200, the gas filtered by the gas filtering chamber 41 can enter the accommodating chamber 31 under the driving of the driving source and be discharged to the outside, thereby realizing the airflow flow of the main air duct of the cleaning device. On the other hand, the motor 10 is partially accommodated in the accommodating groove 21, and at least a part of the outer surface of the motor 10 and the groove wall of the accommodating groove 21 together define a cooling air inlet channel 22 communicated with the interior of the motor 10, so that when the cooling fan 11 in the motor 10 operates, cooling air entering the cooling air inlet channel 22 through the air inlet of the cooling air inlet channel 22 can cool the interior of the motor 10. In this process, since the groove wall of the accommodating groove 21 is at least partially configured as the first diversion cambered surface 211, the air flow flowing in the cooling air inlet channel 22 is guided, so that the wind resistance of the air flowing in the cooling air inlet channel 22 can be reduced to a greater extent, the wind noise is reduced, and the noise generated when the motor device 100 operates is reduced. In addition, the cooling air inlet channel 22 is smooth, and the air flow guiding performance is good, so that the air loss is reduced, the power consumption is reduced, and the energy is saved.

Wherein, the partial accommodation of the motor 10 in the accommodation groove 21 means that the partial structure of the motor 10 is located in the accommodation groove 21, and the motor 10 can be connected and fixed on the groove wall of the accommodation groove 21 by a fastener such as a screw. In particular, the bottom of the accommodating groove 21 is convexly provided with a plurality of protruding parts 213, and the bottom of the motor 10 can be abutted and supported on the protruding parts 213 and fixed on the bottom of the accommodating groove 21 by fasteners such as screws. The arrangement of the plurality of protruding portions 213 can also provide a space between the bottom of the motor 10 and the bottom of the accommodating groove 21, so as to facilitate the formation of the cooling air inlet channel 22.

The first cover 30 may be configured to be hollow and have an opening, and the flow guiding member 20 covers the opening, so that a receiving cavity 31 may be defined between the flow guiding member 20 and the first cover 30.

The motor shaft 12 of the motor 10 penetrates through the guide member 20 and extends into the accommodating cavity 31, for example, a through hole may be provided on the guide member 20, and the motor shaft 12 extends into the accommodating cavity 31 after passing through the through hole.

With continued reference to fig. 3, as mentioned above, at least a part of the outer surface of the motor 10 and the groove wall of the accommodating groove 21 together define a cooling air inlet channel 22 communicating with the interior of the motor 10, the air inlet of the cooling air inlet channel 22 is located at the upper end (i.e. the upper end in the drawing in fig. 3) of the cooling air inlet channel 22, and the air outlet of the cooling air inlet channel 22 is located at the bottom of the accommodating groove 21.

In the embodiment of the present application, the included angle between the tangent line of each point on the first diversion cambered surface 211 and the axial direction of the motor shaft 12 gradually increases from the bottom of the accommodating groove 21 towards the notch of the accommodating groove 21, and the first diversion cambered surface is in a shape that expands gradually from bottom to top. In this way, the distance between the first diversion cambered surface 211 and the outer surface of the motor 10 gradually decreases from top to bottom (up-down direction of the drawing in fig. 3), and the wind resistance can be further reduced and the noise can be reduced due to a certain gathering and guiding effect on the cooling wind. In addition, the cooling air inlet channel 22 is smooth, the air flow guiding performance is good, the wind loss is reduced, and the power consumption is reduced.

Fig. 4 is a cross-sectional view of another angle of the motor apparatus according to the embodiment of the present application, and it should be noted that the cross-section XZ of fig. 4 is perpendicular to the cross-section YZ of fig. 3.

In particular, referring to fig. 4, the deflector 20 may include a bottom plate 23 and a side plate 24 surrounding and coupled to an outer edge of the bottom plate 23, and the bottom plate 23 and the side plate 24 together define the receiving groove 21. In practice, the side plates 24 are circumferentially around the bottom plate 23, so that the bottom plate 23 and the side plates 24 together form a hood-like structure to house part of the structure of the motor 10. In addition, an air inlet of the cooling air inlet channel 22 may be defined between the upper end portion of the side plate 24 and the outer surface of the motor 10, and in the case where the outer surface of the motor 10 is a cylindrical surface and the first diversion cambered surface 211 is a continuous annular surface, the air inlet of the cooling air inlet channel 22 may be formed in a ring shape or formed as a part of a ring shape.

With continued reference to fig. 3 and 4, in an embodiment of the present application, the cooling intake passage 22 may include a continuous first passage section 221 and second passage section 222, wherein side plates 24 and side surfaces of the motor 10 define the first passage section 221, and the bottom plate 23 and bottom end surface of the motor 10 define the second passage section 222. Such that the outside air passes through the first passage section 221 and the second passage section 222 in order in the direction of the one-dot chain line arrow shown in fig. 4 into the inside of the motor 10.

Further, a first cooling air inlet 131 is provided on the bottom end face of the motor 10 facing the bottom plate 23, and the first cooling air inlet 131 is located in the second channel section 222.

In this way, in the case where the first cooling air intake 131 is formed on the bottom end surface of the motor 10, it is necessary to keep a certain distance between the bottom end surface of the motor 10 and the flow guide 20, for example, the bottom plate 23, so that the cooling air flow can smoothly flow into the interior of the motor 10 through the second passage section 222. However, due to the limited axial dimensions of the motor device 100, this distance should not be set too great, and it is conceivable to provide an air inlet also in the first channel section 221 in order to ensure a sufficient cooling air flow into the interior of the motor 10.

In particular, a second cooling air inlet 132 may be provided on the side surface of the electric machine 10 near the bottom end surface of the bottom plate 23, the second cooling air inlet 132 being located in the first channel section 221. As shown by the single-dot chain line arrow in fig. 4, the part of the cooling air flow entering the cooling air inlet passage 22 from the upper end portion of the side plate 24 can enter the interior of the motor 10 through the second cooling air inlet 132, and the other part of the air flow can enter the interior of the motor 10 through the first cooling air inlet 131, and the space between the bottom end surface of the motor 10 and the bottom plate 23 can be properly reduced during the design process, so that the structure of the motor apparatus 100 is more compact.

With continued reference to fig. 4, the cooling air flow, after entering the interior of the motor 10, is sufficiently heat exchanged with the various structures within the motor 10 and then flows out of the motor 10. Illustratively, the portion of the motor 10 outside the accommodating groove 21 is provided with a cooling air outlet 133, and the cooling air outlet 133 is located at a side, for example, a radial side, of the cooling fan 11.

The cooling air outlet 133 is located at a side of the cooling fan 11, which means that the position of the cooling air outlet 133 corresponds to the position of the cooling fan 11 in the axial direction of the motor 10, so that the cooling air flow generated by the rotation of the cooling fan 11 can be discharged to the outside of the motor 10 through the cooling air outlet 133 to the maximum.

In the embodiment of the present application, the number of the first cooling air inlets 131 may be set as required, for example, four first cooling air inlets 131 may be set uniformly around the axial direction of the motor 10, the number of the cooling air outlets 133 may be set to two, and the two cooling air outlets 133 may be symmetrically arranged on the upper side of the motor 10.

In an embodiment of the present application, referring to fig. 3 and 4, the motor 10 may include a motor housing 13, a motor shaft 12, and a motor body 15 accommodated in the motor housing 13, wherein the cooling fan 11 is also accommodated in the motor housing 13. The motor shaft 12 penetrates through the motor body 15, and the motor shaft 12 comprises a first motor shaft section 121 and a second motor shaft section 122 which are respectively protruded at two opposite ends along the axial direction of the motor body 15.

As described above, the motor 10 is connected to the guide 20, and the motor shaft 12 penetrates through the guide 20 and goes deep into the accommodating cavity 31. In a specific implementation, the motor casing 13 is connected to the bottom plate 23 of the guide member 20, and the first motor shaft section 121 penetrates through the motor casing 13 and the guide member 20 and extends into the accommodating cavity 31, and the impeller assembly 60 is located in the accommodating cavity 31 and has a part of its structure connected to the first motor shaft section 121. The cooling fan 11 is connected to the second motor shaft 122, and the cooling air outlet 133 is provided on the motor housing 13 and is disposed corresponding to the position of the cooling fan 11.

In the above-mentioned scheme, connect in second motor shaft section 122 through cooling fan 11, and the position that corresponds cooling fan 11 on the motor casing 13 is equipped with cooling air outlet 133, be equipped with on the bottom face of motor 10 towards water conservancy diversion spare 20 with the inside first cooling air intake 131 of intercommunication of motor casing 13, and the bottom face is apart from water conservancy diversion spare 20 has the interval. Referring to the single-dot chain arrow in fig. 4, the external cooling air flow can enter the motor housing 13 through the bottom of the motor 10, that is, the first cooling air inlet 131 near the first motor shaft section 121, exchange heat with the motor body 15, drive the cooling fan 11 on the second motor shaft section 122, and finally discharge the cooling air out of the motor housing 13 through the cooling air outlet 133, so that the flow direction of the cooling air flow in the motor housing 13 flows from the bottom of the motor 10 to the top of the motor 10, and the heat accumulated at the top of the motor 10 is higher than that at the use state of the motor 10, so that the external air with lower temperature flows from the bottom of the motor 10 to the top, thereby avoiding the problem of lower cooling efficiency caused by the fact that the external air flows through the bottom after being heated by the top, and greatly improving the cooling efficiency.

On the other hand, since the impeller assembly 60 is located in the accommodating cavity 31 and is connected to the first motor shaft section 121, and the cooling fan 11 is connected to the second motor shaft section 122, in other words, the impeller assembly 60 and the cooling fan 11 are located on opposite sides of the motor 10, which makes the stress of the motor 10 relatively uniform. In detail, compared with the impeller assembly 60 and the cooling fan 11 which are positioned on the same side of the motor 10 and the motor shaft 12 which extends longer relative to the motor body 15, and the motor 10 which bears larger stress on one side, the impeller assembly 60 and the cooling fan 11 are positioned at the opposite ends of the motor 10, so that the stress on the two ends of the motor 10 is more uniform, and the stability of the motor 10 is also better.

As described above, the second cooling air inlet 132 may be provided on the side surface of the motor 10, and in particular, the second cooling air inlet 132 is provided on the outer side wall of the motor casing 13 at a position close to the bottom end surface. The second cooling air inlets 132 may be disposed at positions and numbers corresponding to the first cooling air inlets 131 one by one, and it is understood that the number and positions of the second cooling air inlets 132 are not limited thereto, and may be disposed according to actual needs.

With continued reference to fig. 4, the motor apparatus 100 further includes a second cover 50, where the second cover 50 covers an end of the motor 10 facing away from the air guiding element 20 and encloses the cooling air outlet 133, and the second cover 50 is provided with a second air outlet 65, and the second air outlet 65 is located on a side of the cooling air outlet 133 facing away from the cooling air inlet channel 22 (i.e. facing away from the first cooling air inlet 131). In this way, the air flow flowing out from the cooling air outlet 133 passes through the space formed between the motor casing 13 and the second cover 50, and then flows out through the second air outlet 65, without interfering with the air inlet of the cooling air inlet duct 22.

In detail, the air inlet of the cooling air inlet channel 22 is located at a substantially central axial position of the motor 10, and may interfere with the cooling air outlet 133 in air flow, and since the second cover 50 covers the cooling air outlet 133, and the second air outlet 65 is located at a side of the cooling air outlet 133 away from the first cooling air inlet 131, in other words, in the positional relationship shown in fig. 4, the air outlet position of the second air outlet 65 is set to be higher than the position of the cooling air outlet 133, so that interference between the air outlet and the air inlet can be avoided as much as possible.

It can be appreciated that since the cooling fan 11 is disposed inside the motor housing 13 and is located at the opposite side of the motor body 15 from the impeller assembly 60, the axial length of the second casing 50 and the first casing 30 for providing the accommodation space of the motor 10 and the impeller assembly 60 is shortened as compared with the case where the impeller assembly 60 and the cooling fan 11 are located at the same side of the motor body 15, making the overall structure of the motor apparatus 100 compact.

Fig. 5 is a further angular cross-sectional view of a motor device according to an embodiment of the present application, and fig. 6 is a schematic structural diagram of a connection portion in the motor device according to the embodiment of the present application. It should be noted that fig. 5 is taken along a plane parallel to the cross-section of fig. 4, which passes through the axis of the motor shaft.

In the embodiment of the present application, referring to fig. 3 and 5, the first cover 30 and the second cover 50 are each configured to have an open hollow structure, the opening edge of the first cover 30 is provided with a connecting portion 32 extending radially inward of the opening, the connecting portion 32 is further connected to the opening edge of the second cover 50, the connecting portion 32 is provided with a through hole 321, and the through hole 321 forms an air inlet of the cooling air inlet channel 22. The first cover 30, the connecting portion 32, and the second cover 50 may be fixed together by fasteners, such as screws, or the like.

It should be noted that, referring to fig. 4 and 6, in order to avoid the air flow of the air inlet of the cooling air inlet channel 22 and the air flow of the second air outlet 65 from affecting each other, the second air outlet 65 and the air inlet of the cooling air inlet channel 22 are staggered from each other in the circumferential direction of the motor 10. In particular, the connection portion 32 may be configured in a circular ring shape, the through holes 321 may be disposed around a circumferential local position of the connection portion 32, and the positions of the through holes 321 are to avoid the disposition positions of the second air outlets 65 on the second cover 50 in the circumferential direction.

Additionally, with continued reference to fig. 4, in some embodiments, a first vibration isolator 51 is also provided between the inner edge of the connecting portion 32 and the outer surface of the motor 10. The first vibration isolator 51 can prevent vibration from being transmitted to the connection portion 32 when the motor 10 is in operation, and can seal a contact portion between the second cover 50 and the motor 10. Thereby also carrying out the isolated seal to the air inlet and the air outlet of cooling air current.

Illustratively, the first vibration isolator 51 is configured as a ring. The inner annular surface of the first vibration isolator 51 is abutted against the outer surface of the motor 10, the outer annular surface of the first vibration isolator 51 is provided with a vibration isolator mounting groove 511, and the inner edge of the connecting portion 32 is clamped in the vibration isolator mounting groove 511. This allows the first vibration isolator 51 to be mounted on the connecting portion 32 relatively stably without displacement in the axial direction of the motor 10. Further, the connecting portion 32 may include an annular stop portion 322, and a portion of the notch edge of the vibration isolator mounting groove 51 may also abut against the stop portion 322, and in the opening edge of the second cover 50, the inner ring portion abuts against the portion of the notch edge of the first vibration isolator 52, and the outer ring portion abuts against the stop portion 322, so that the vibration isolation sealing effect is better.

It will be appreciated that, since the outer circumferential surface of the first vibration isolator 51 is provided with the vibration isolator mounting groove 511, the thickness of the outer circumferential portion of the first vibration isolator 51 is greater than the thickness of the inner circumferential portion in order to secure the strength of the first vibration isolator 51.

Fig. 7 is a schematic view of another structure of a motor apparatus according to an embodiment of the present application.

Referring to fig. 7, in the embodiment of the present application, a casing 70 is further covered on the outer side of the motor device 100, and a casing air inlet 71 that is communicated with the casing 70 is provided on the casing 70, and the casing air inlet 71 is communicated with the air inlet of the cooling air inlet channel 22. In particular, a grille structure may be configured at the air inlet 71 of the casing, and a noise-reducing cotton (not shown) may be further disposed on a side of the grille structure facing the casing 70, so as to reduce air intake noise.

Further, the casing 70 may further be provided with a casing air outlet 72 that is communicated with the casing 70, and a second air outlet channel is formed in the casing 70, and two ends of the second air outlet channel are respectively communicated with the casing air outlet 72 and the second air outlet 65.

Similar to the case air inlet 71, the case air outlet 72 may be configured with a grill structure, and a side of the grill structure facing the inside of the case 70 may be provided with noise-reducing cotton to reduce air-out noise.

In particular, a connecting pipe 721 extending toward the second cover 50 is connected to the housing air outlet 72, and one end of the connecting pipe 721 facing away from the housing air outlet 72 is hermetically connected to the second air outlet 65. The air flow discharged from the second air outlet 65 in this way is discharged to the outside through the housing air outlet 72 after passing through the soundproof cotton.

In the embodiment of the present application, with continued reference to fig. 5, the first cover 30 is provided with a first air outlet 34 that is in communication with the accommodating cavity 31, where the first air outlet 34 may be, for example, a substantially square air outlet. The first air outlet 34 may be connected to a third air outlet passage 91 in a support member described later.

In addition, the impeller assembly 60 is provided with a plurality of first air inlet passages 61 communicated with the gas filtering chamber 41, and the side plate 24, the first cover 30 and the impeller assembly 60 together define a first air outlet passage which is respectively communicated with the first air inlet passages 61 and the first air outlet 34. Thus, the gas from the gas filter chamber 41 enters the first air outlet passage through the first air inlet passage 61 and enters the third air outlet passage 91 through the first air outlet 34.

At least a portion of the surface of the side plate 24 facing away from the first air guiding cambered surface 211 is configured as a second air guiding cambered surface 212, in other words, at least a portion of the surface of the side plate 24 located in the first air outlet channel is configured as a second air guiding cambered surface 212 to guide the air flow entering the first air outlet 34 from the first air outlet channel. Thus, the wind resistance of the air flow in the first air outlet channel can be reduced to a large extent, the wind noise is reduced, and the noise generated when the motor device 100 operates is reduced. In addition, the cooling air inlet channel 22 is smooth, the air flow guiding performance is good, the wind loss is reduced, and the power consumption is reduced.

In this way, the guiding requirements of the dry air flow and the wet air flow are considered by the guiding piece 20, the dry air flow is received by the upper surface of the guiding piece 20, the wet air flow is guided by the lower surface of the guiding piece 20, and the smoothness and the energy conservation in the air flow process are improved.

In the embodiment of the present application, in order to improve the guiding effect on the air flow, at least one of the first guide cambered surface 211 and the second guide cambered surface 212 may be arranged around the entire circumference of the guide member 20, and in particular, at least one of the first guide cambered surface 211 and the second guide cambered surface 212 may be arranged around the entire circumference of the bottom plate 23.

Further, the included angle between the tangent line of each point on the second guiding cambered surface 212 and the axial direction of the motor shaft 12 gradually increases from the bottom of the accommodating groove 21 to the notch of the accommodating groove 21. That is, the second flow guiding cambered surface 212 is configured as an inner concave surface, and the concave direction of the inner concave surface can deviate from the first air outlet 34, so that air flow is guided to pass through the first air outlet 34 and enter the third air outlet channel 91.

In the embodiment of the present application, with continued reference to fig. 5, the first cover 30 is provided with a first air inlet 33 for communicating with the air filtering chamber 41, and the impeller assembly 60 includes an impeller cover 64, and a movable impeller 63 and a fixed impeller 62 which are covered in the impeller cover 64; the movable impeller 63 is rotatably connected to the motor shaft 12, and the fixed impeller 62 is connected to the impeller housing 64.

The first air intake passage 61 is formed in the fixed impeller 62, and the movable impeller 63 is used to generate an airflow in the first air intake passage 61 under the driving of the motor shaft 12. The stator 62 includes a plurality of blades 621, and a first air intake passage 61 may be defined between adjacent blades 621.

Illustratively, the air guiding element 20 may be fixed to the fixed impeller 62, in particular, the bottom plate 23 may be fixed to the fixed impeller 62, and in order to enable the air flow in the first air intake passage 61 to be better guided by the second air guiding cambered surface 212, the air outlet of the first air intake passage 61 may be disposed towards the second air guiding cambered surface 212. In particular, referring to fig. 5, the second inducer surface 212 may be located directly above the blades 621 in the stator wheel 62.

In addition, the impeller cover 64 has an air inlet, and a second vibration isolator 52 is provided between the edge of the air inlet of the impeller cover 64 and the edge of the first air inlet 33. The second vibration isolator 52 prevents vibration generated when the impeller cover 64 is in operation from being transmitted to the first cover 30. It is also possible to prevent wind at the first air intake port 33 from entering the accommodating chamber 31 from the gap between the impeller cover 64 and the first cover body 30, resulting in air leakage.

In some embodiments, a vibration isolation seal 25 is provided between the baffle 20 and the first enclosure 30. In particular, the vibration isolation gasket 25 may be wrapped around the periphery of the opening of the baffle 20. The connecting portion 32 may abut the opening edge of the deflector 20 against the opening edge of the first housing 30 via the vibration isolation gasket 25.

Thus, in connection with fig. 4 and 5, the components rigidly connected to the motor 10 include the air guide 20 and the impeller cover 64, the air guide 20 being clamped between the connection portion 32 and the first housing 30 via the vibration isolation gasket 25 in the above-described manner, the impeller cover 64 being in contact with the first housing 30 via the second vibration isolation gasket 52, and furthermore, the middle position of the motor 10 being supported on the connection portion 32 via the first vibration isolation gasket 51, and the inner ring portion being abutted against a portion of the notch edge of the first vibration isolation gasket 52 and the outer ring portion being abutted against the stopper 322 of the connection portion 32, in the opening edge of the second housing 50. As described above, by providing the first vibration isolation pad 51, the second vibration isolation pad 52, and the vibration isolation seal 25, the direct or indirect contact between the motor 10 and the second cover 50, the first cover 30 is flexible, and the vibration on the motor 10 can be prevented from being transmitted to the first cover 30, the second cover 50, and the connection portion 32.

In the motor device 100 of the embodiment of the application, the guide piece 20 is actually taken as a boundary, the cooling air flow for cooling the motor 10 flows through the top of the guide piece 20, the wet air flow for realizing cleaning work flows through the bottom of the guide piece 20, and the cooling air flow and the cleaning work wet air flow can be simultaneously guided only through one guide piece 20 as the top surface of the guide piece 20 is constructed as the first guide cambered surface 211 and the bottom surface is constructed as the second guide cambered surface 212, so that noise is reduced, and the use experience of an operator is improved.

Fig. 8 is a cross-sectional view of a cleaning apparatus according to an embodiment of the present application, and fig. 9 is a schematic structural view of a support member in the cleaning apparatus according to the embodiment of the present application.

Referring to fig. 8 and 9, as previously described, the cleaning apparatus 200 further includes the gas filtering assembly 40 and the dirt box 80 disposed on the support 90, the gas filtering chamber 41 is disposed in the gas filtering assembly 40, the dirt box 80 is in communication with the accommodating cavity 31 of the motor device 100 through the gas filtering chamber 41, in fact, the impeller assembly 60 in the accommodating cavity 31 is operated as a driving source, and suction force is generated in the accommodating cavity 31, so that the dirt collected from the ground brush assembly 42 reaches the dirt box 80 at least partially through the inlet pipe of the dirt box 80, is separated and collected and then enters the gas filtering chamber 41, or possibly part of the dirt directly enters the gas filtering chamber 41 through the inlet pipe of the dirt box 80, so that the air flow with water vapor can be filtered through the gas filtering chamber 41, and the filtered air flow enters the accommodating cavity 31 through the first air inlet 33 and flows out through the first air outlet 34 on the first cover 30.

In addition, an air outlet gap 81 is defined between the dirt box 80 and the opposite outer surface of the support member 90, and a third air outlet passage 91 is constructed in the support member 90, and one end of the third air outlet passage 91 communicates with the accommodating chamber 31 and the other end communicates with the air outlet gap 81.

In this way, the air flow flowing out through the first air outlet 34 enters the third air outlet passage 91 and is discharged to the outside through the air outlet gap 81. In addition, a guide plate 912 may be disposed at the air inlet of the third air outlet channel 91 to guide the air flow entering the third air outlet channel 91 from the accommodating chamber 31.

In particular, a noise-reducing cotton may be disposed in the third air outlet channel 91 to reduce wind noise. In some examples, the air outlet of the third air outlet channel 91 is further provided with an air outlet grille 911. The air flow with noise reduced by the noise reduction cotton can enter the air outlet gap 81 through the air outlet grille 911.

In the embodiment of the present application, the supporting member 90 includes a bottom supporting member 92 and a side supporting member 93 connected, the bottom supporting member 92 is located at the bottom of the dirt box 80 and has a first space 921 with the bottom of the dirt box 80, the side supporting member 93 is located at the side of the dirt box 80 and has a second space 931 with the sidewall of the dirt box 80, and the first space 921 and the second space 931 are communicated to form the air outlet gap 81 as described above. In other words, some of the air flow discharged from the air outlet of the third air outlet channel 91 escapes around the support member 90 through the second space 931, and some of the air flow continues along the second space 921 and enters the first space 921 to escape around the support member 90 through the first space 921.

Referring to fig. 1, 8 and 9, after the gas-liquid-solid mixture (i.e. the sucked dirt after cleaning the ground) generated by the floor brush assembly 42 is filtered, the solid and most of the liquid are collected in the dirt box 80, the gas-liquid mixed fluid continues to be sucked upwards, after being further filtered by the gas filtering chamber 41, the gas-liquid mixed fluid enters the first air outlet channel in the first cover 30, and sequentially flows through the second guiding cambered surface 212 on the lower surface of the guiding element 20 and the guiding plate 912 into the third air outlet channel 91 in the supporting element 90, part of the gas-liquid mixed fluid firstly escapes to the periphery of the supporting element 90 through the second interval 931, and part of the gas-liquid mixed fluid continues to flow along the second interval 931 and enters the first interval 921, and escapes to the periphery of the supporting element 90 through the first interval 921.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A motor device, characterized by comprising a motor (10), a flow guide (20), a first cover (30) and an impeller assembly (60);

A cooling fan (11) is arranged inside the motor (10);

the surface of the flow guide piece (20) is provided with a containing groove (21), and the motor (10) is partially contained in the containing groove (21);

The guide piece (20) is covered on the first cover body (30), and one side of the guide piece (20) deviating from the motor (10) and the first cover body (30) enclose a containing cavity (31);

A motor shaft (12) of the motor (10) penetrates through the guide piece (20) and extends into the accommodating cavity (31), the impeller assembly (60) is positioned in the accommodating cavity (31) and is partially connected to the motor shaft (12), and the accommodating cavity (31) is respectively communicated with the outside and a gas filtering cavity (41) of the cleaning equipment (200);

At least part of the outer surface of the motor (10) and the groove wall of the accommodating groove (21) jointly define a cooling air inlet channel (22) communicated with the interior of the motor (10), and the groove wall of the accommodating groove (21) is at least partially constructed into a first diversion cambered surface (211) so as to guide the air flow flowing in the cooling air inlet channel (22).

2. The motor device according to claim 1, characterized in that the angle between the tangent of each point on the first diversion cambered surface (211) and the axial direction of the motor shaft (12) gradually increases from the bottom of the accommodating groove (21) towards the notch of the accommodating groove (21).

3. The motor device according to claim 1, characterized in that the flow guide (20) comprises a bottom plate (23) and a side plate (24) surrounding and connected to the outer edge of the bottom plate (23), the bottom plate (23) and the side plate (24) defining the receiving recess (21).

4. A motor arrangement according to claim 3, characterized in that the cooling air intake channel (22) comprises a first channel section (221) and a second channel section (222) in succession;

the side plates (24) and the side surfaces of the motor (10) define the first channel section (221), and the bottom plate (23) and the bottom end surface of the motor (10) define the second channel section (222).

Preferably, a first cooling air inlet (131) is arranged on the bottom end surface of the motor (10) facing the bottom plate (23), and the first cooling air inlet (131) is positioned in the second channel section (222); and/or

A second cooling air inlet (132) is arranged on the side surface of the motor (10) near the bottom end surface of the bottom plate (23), and the second cooling air inlet (132) is positioned in the first channel section (221).

Preferably, a cooling air outlet (133) is formed in a part of the motor (10) located outside the accommodating groove (21), and the cooling air outlet (133) is located at the side of the cooling fan (11).

Preferably, the motor device (100) further comprises a second cover body (50), the second cover body (50) is covered on the end part of the motor (10) deviating from the guide piece (20), and covers the cooling air outlet (133) inside, a second air outlet (65) is arranged on the second cover body (50), and the second air outlet (65) is located on one side of the cooling air outlet (133) deviating from the cooling air inlet channel (22).

5. The motor arrangement according to claim 4, characterized in that the first housing (30) and the second housing (50) are each configured as a hollow structure with an opening;

The opening edge of the first cover body (30) is provided with a connecting portion (32) extending towards the radial inner side of the opening, the connecting portion (32) is connected to the opening edge of the second cover body (50), the connecting portion (32) is provided with a through hole (321), and the through hole (321) forms an air inlet of the cooling air inlet channel (22).

6. The electric motor arrangement according to claim 5, characterized in that the second air outlet (65) and the air inlet of the cooling air inlet channel (22) are offset from each other in the circumferential direction of the electric motor (10).

7. The motor device according to claim 5, characterized in that a housing (70) is further covered on the outer side of the motor device (100), a housing air inlet (71) communicated with the interior of the housing (70) is arranged on the housing (70), and the housing air inlet (71) is communicated with the air inlet of the cooling air inlet channel (22); and/or

The motor device is characterized in that a shell (70) is further covered on the outer side of the motor device (100), a shell air outlet (72) communicated with the inside of the shell (70) is formed in the shell (70), a second air outlet channel is formed in the shell (70), and two ends of the second air outlet channel are respectively communicated with the shell air outlet (72) and the second air outlet (65).

Preferably, when the casing (70) is provided with a casing air outlet (72), a connecting pipe (721) extending towards the second casing (50) is connected to the casing air outlet (72), and one end of the connecting pipe (721) away from the casing air outlet (72) is connected to the second air outlet (65) in a sealing manner.

8. The motor arrangement according to claim 5, characterized in that a first vibration isolator (51) is provided between the inner edge of the connection portion (32) and the outer surface of the motor (10).

Preferably, the first vibration isolator (51) is configured as a ring;

The inner annular surface of the first vibration isolation pad (51) is abutted to the outer surface of the motor (10), the outer annular surface of the first vibration isolation pad (51) is provided with a vibration isolation pad mounting groove (511), and the inner edge of the connecting part (32) is clamped in the vibration isolation pad mounting groove (511).

9. The motor device according to any one of claims 1 to 8, characterized in that the first cover (30) is provided with a first air outlet (34) communicated with the accommodating cavity (31); -said impeller assembly (60) having a plurality of first air inlet channels (61) configured therein in communication with said gas filtration chamber (41);

The flow guide piece (20), the first cover body (30) and the impeller assembly (60) jointly define a first air outlet channel, and the first air outlet channel is respectively communicated with the first air inlet channel (61) and the first air outlet (34);

At least part of the surface of the flow guiding piece (20) facing away from the first flow guiding cambered surface (211) is configured as a second flow guiding cambered surface (212) so as to guide the air flow entering the first air outlet (34) from the first air outlet channel.

Preferably, at least one of the first and second flow guiding cambered surfaces (211, 212) is arranged around the entire circumference of the flow guiding member (20).

Preferably, the included angle between the tangent line of each point on the second diversion cambered surface (212) and the axial direction of the motor shaft (12) gradually increases from the bottom of the accommodating groove (21) to the direction of the notch of the accommodating groove (21).

Preferably, a first air inlet (33) used for communicating with the gas filtering chamber (41) is arranged on the first cover body (30);

the impeller assembly 60) comprises an impeller cover (64), and a movable impeller (63) and a fixed impeller (62) which are covered in the impeller cover (64);

The movable impeller (63) is rotatably connected to the motor shaft (12), and the fixed impeller (62) is connected to the impeller cover (64);

The first air inlet channel (61) is formed in the fixed impeller (62), and the movable impeller (63) is used for generating airflow in the first air inlet channel (61) under the driving of the motor shaft (12).

Preferably, the flow guiding piece (20) is fixed on the fixed impeller (62), and the air outlet of the first air inlet channel (61) faces the second flow guiding cambered surface (212).

Preferably, the impeller cover (64) is provided with an air inlet, and a second vibration isolation pad (52) is arranged between the edge of the air inlet of the impeller cover (64) and the edge of the first air inlet (33).

Preferably, a vibration isolation sealing gasket (25) is arranged between the flow guide piece (20) and the first cover body (30).

10. A cleaning appliance comprising a motor arrangement as claimed in any one of claims 1 to 9.

Preferably, the cleaning device (200) further comprises a supporting member (90), a gas filtering assembly (40) and a dirt box (80) which are arranged on the supporting member (90), the gas filtering chamber (41) is arranged in the gas filtering assembly (40), the dirt box (80) is communicated with the accommodating cavity (31) of the motor device (100) through the gas filtering chamber (41), an air outlet gap (81) is defined between the surface, opposite to the supporting member (90), of the dirt box (80), a third air outlet channel (91) is formed in the supporting member (90), one end of the third air outlet channel (91) is communicated with the accommodating cavity (31), and the other end of the third air outlet channel (91) is communicated with the air outlet gap (81).

Preferably, the third air outlet channel (91) is provided with silencing cotton; and/or an air outlet of the third air outlet channel (91) is provided with an air outlet grid (911).

Preferably, the support (90) comprises a bottom support (92) and a side support (93) connected;

The bottom support (92) is located at the bottom of the dirt box (80) and has a first space (921) with the bottom of the dirt box (80), the side support (93) is located at the side of the dirt box (80) and has a second space (931) with the side wall of the dirt box (80), and the first space (921) and the second space (931) are communicated to form the air outlet gap (81).

Preferably, the air inlet of the third air outlet channel (91) is provided with a guide plate (912) so as to guide the air flow entering the third air outlet channel (91) from the accommodating cavity (31).