Motor device and scrubber

Abstract

The utility model discloses a motor device and a scrubber, and belongs to the technical field of cleaning equipment. The motor device comprises a driving assembly, a movable impeller, a first fan cover and a second fan cover, the driving assembly is provided with a driving shaft, the movable impeller is connected with the driving shaft, the first fan cover covers the outer side of the movable impeller and is provided with an air inlet and a ventilation opening, and the second fan cover covers the outer side of the first fan cover and is provided with an air outlet communicated with the ventilation opening. According to the motor device provided by the utility model, through the first fan cover and the second fan cover, the noise level of the motor device can be reduced, and the waterproof performance of the motor device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a motor device and a floor washer including the motor device. Background Art

[0002] A floor washer relies on a blower to generate negative pressure in a passage, thereby sucking dry and wet garbage on the ground into a sewage tank. Since the use of a floor washer is closely related to water, the dry and wet motor has certain requirements for waterproof performance. At the same time, the motor itself is a sound source, so the noise level of the motor determines the noise level of the whole machine.

[0003] In the related art, there are two types of air outlet modes for the dry and wet motor: one is axial air outlet, and the other is radial air outlet. For the motor with axial air outlet, an unperforated air hood is press-fitted outside the impeller, and the air outlet of the impeller is forced to turn and flow out axially from the side. For the motor with radial air outlet, a perforated air hood is press-fitted outside the impeller, and the air outlet of the impeller is directly discharged through the perforated air hood. Under the condition that other assembly methods are the same, the noise level of the motor with axial air outlet is better than that of the motor with radial air outlet, but the waterproof performance level of the axial air outlet is lower than that of the radial air outlet. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to a certain extent.

[0005] For this purpose, an object of the utility model is to provide a motor device, which can reduce the noise level of the motor device and improve the waterproof performance of the motor device through a first air hood and a second air hood.

[0006] Another object of the utility model is to provide a floor washer, which includes the aforementioned motor device.

[0007] According to the motor device of the embodiment of the utility model, the motor device includes a drive assembly, an impeller, a first air hood and a second air hood. The drive assembly has a drive shaft, the impeller is connected to the drive shaft, the first air hood covers the outside of the impeller and is provided with an air inlet and a ventilation opening, and the second air hood covers the outside of the first air hood and is provided with an air outlet communicating with the ventilation opening.

[0008] According to the motor device of the embodiment of the utility model, the noise level of the motor device can be reduced and the waterproof performance of the motor device can be improved through the first air hood and the second air hood.

[0009] In addition, according to the motor device of the above embodiment of the utility model, the following additional technical features may further be provided:

[0010] Optionally, the air outlet is offset from the ventilation opening.

[0011] Optionally, the ventilation opening is provided on the peripheral wall of the first air hood, and the air outlet is provided at one end of the second air hood along the axis direction of the impeller.

[0012] Optionally, a stationary impeller is provided at the said one end of the second air hood, and the stationary impeller is arranged circumferentially around the impeller.

[0013] Optionally, the air inlet faces the impeller along the axis of the impeller; and / or, the air outlet is configured to discharge air axially along the impeller; and / or, the air inlet direction and the air outlet direction are the same.

[0014] Optionally, the ventilation opening is provided on the peripheral wall of the first air hood, and at least a part of the ventilation opening is offset from the impeller in the radial direction of the impeller.

[0015] Optionally, the minimum distance L1 between the ventilation opening and the air outlet along the axis of the impeller satisfies L1≥5mm.

[0016] Optionally, the minimum distance L2 between the ventilation opening and the inner peripheral wall of the second air hood in the radial direction of the impeller satisfies L2≥4mm.

[0017] Optionally, the impeller is a backward-curved vane impeller.

[0018] Optionally, the first air hood includes guide vanes, the ventilation opening has a first side and a second side along the rotation direction of the impeller, and the guide vanes are connected to the edge of the first side of the ventilation opening and extend along the rotation direction of the impeller.

[0019] Optionally, a first seal is provided on the periphery of the air inlet, and the first seal seals the gap between the periphery of the air inlet and the impeller.

[0020] Optionally, the motor device further includes a housing, the air inlet is provided at one end of the first air hood along the axis of the impeller, and the other end of the first air hood along the axis of the impeller sleeves the outer peripheral surface of the housing.

[0021] Optionally, one end of the second air hood along the axis of the impeller is connected to the first air hood, and the other end and the housing define the air outlet therebetween, the housing includes a stationary impeller, and the other end of the second air hood sleeves the outer peripheral surface of the stationary impeller.

[0022] Optionally, the stationary impeller includes a plurality of stationary vanes distributed circumferentially around the impeller, gaps are provided between adjacent stationary vanes, and the stationary vanes are parallel to the axis of the impeller or at least a part thereof is inclined to the axis of the impeller.

[0023] According to the floor washer in the embodiments of the present utility model, the floor washer includes a body and the motor device described above, and the motor device is disposed in the body.

[0024] According to the floor washer in the embodiments of the present utility model, by applying the foregoing motor device, the noise level of the floor washer can be reduced, and the waterproof performance of the floor washer can be improved, thereby improving the user experience. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the motor device in some embodiments of the present utility model.

[0026] Figure 2 It is a cross-sectional view of the motor device in some embodiments of the present utility model.

[0027] Figure 3 It is a schematic diagram of the motor device in some embodiments of the present utility model (the drive assembly is not shown).

[0028] Figure 4 It is a schematic diagram of the first air hood and the impeller in some embodiments of the present utility model.

[0029] Figure 5 It is a schematic diagram of the housing in some embodiments of the present utility model.

[0030] Figure 6 It is an exploded view of the motor device in some embodiments of the present utility model.

[0031] Reference Numerals:

[0032] Motor device 100, drive assembly 10, impeller 20, first air hood 30, air inlet 31, ventilation opening 32, guide vane 33, flange 34, second air hood 40, air outlet 41, first seal 50, second seal 60, housing 70, cylindrical portion 71, first part 711, second part 712, plate portion 72, stationary impeller 73, stationary vane 731, support frame 732, axial direction A-A. Detailed Description of the Embodiments

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0034] In the related art, for a motor device with radial air outlet, when water droplets or water vapor carried by the impeller during rotation are thrown out, most of the water will be discharged to the outside of the motor device through the open air hood, and very little will rebound into the motor device. Since the opening of the air hood of the motor with radial air outlet causes the sound of the motor to directly pass through the air hood and be heard by the human ear when released into the atmosphere, generally, the motor with radial air outlet has good waterproof performance but poor noise level.

[0035] For a motor device with axial air outlet, when water droplets or water vapor carried by the impeller during rotation are thrown out, since the air hood is closed and not opened, most of the water rebounds into the motor device. However, since the air hood is closed, part of the sound needs to pass through the air hood to be released into the atmosphere, and the other part is blocked by the air hood and turns and is released axially. Therefore, generally, the motor with axial air outlet has good noise level but poor waterproof performance.

[0036] Therefore, the present utility model proposes a motor device 100 and a floor washer. The motor device 100 can reduce the noise level and improve the waterproof performance of the motor device 100 through the first air hood 30 and the second air hood 40.

[0037] Referring to Figures 1 to 6 , according to the motor device 100 of the embodiment of the present utility model, the motor device 100 includes a driving assembly 10, an impeller 20, a first air hood 30 and a second air hood 40.

[0038] Among them, the driving assembly 10 has a driving shaft, the impeller 20 is connected to the driving shaft, the first air hood 30 is disposed outside the impeller 20 and is provided with an air inlet 31 and a ventilation opening 32, and the second air hood 40 is disposed outside the first air hood 30 and is provided with an air outlet 41 communicating with the ventilation opening 32; in this way, the noise level of the motor device 100 can be reduced, and the waterproof performance of the motor device 100 can be improved.

[0039] Specifically, when the motor device 100 works, the driving assembly 10 drives the impeller 20 to rotate through the driving shaft. The impeller 20 can drive the air flow to enter from the air inlet 31 of the first air hood 30, flow through the ventilation opening 32 of the first air hood 30, and then flow out from the air outlet 41 of the second air hood 40; during this process, the noise generated by the rotation of the impeller 20 needs to enter the outside of the motor device 100 through the first air hood 30 and the second air hood 40. In this way, the transmission path of the noise becomes longer, and the noise can be reduced after passing through the first air hood 30 and the second air hood 40, so that the noise energy transmitted to the atmosphere is weakened, and finally the noise of the motor device 100 is improved. In addition, under the driving action of the impeller 20, the water flow carried by the air flow can be thrown out of the first air hood 30 through the ventilation opening 32, avoiding the water flow from passing through the connection between the impeller 20 and the driving assembly 10 and polluting and corroding the inside of the driving assembly 10.

[0040] In summary, for the motor device 100 according to the embodiments of the present utility model, by means of the first air shroud 30 and the second air shroud 40, the noise level of the motor device 100 can be reduced, and the waterproof performance of the motor device 100 can be improved.

[0041] Furthermore, the air outlet 41 of the second air shroud 40 is staggered from the ventilation opening 32 of the first air shroud 30, so as to form a circuitous noise transmission path inside the motor device 100. In this way, the distance of the noise transmission in the motor device 100 increases, and the noise can be further blocked or rebounded, so that the noise is reduced within the first air shroud 30 and the second air shroud 40, thereby weakening the noise energy transmitted from the motor device 100 to the atmosphere.

[0042] Referring to Figures 2 to 4 、 Figure 6 , in some embodiments of the present utility model, the ventilation opening 32 is provided on the circumferential wall of the first air shroud 30, and the air outlet 41 is provided at one end of the second air shroud 40 along the axis direction of the impeller 20; in this way, the noise level of the motor device 100 can be reduced, and the waterproof performance of the motor device 100 can be improved.

[0043] Specifically, the circumferential wall of the first air shroud 30 extends along the direction around the axis of the impeller 20, the ventilation opening 32 is provided on the circumferential wall of the first air shroud 30, and when the impeller 20 rotates, the ventilation opening 32 of the first air shroud 30 discharges air radially along the impeller 20; and the air outlet 41 is provided at one end of the second air shroud 40 along the axis direction of the impeller 20, that is, the air outlet 41 of the second air shroud 40 discharges air along the axis direction of the impeller 20; in this way, the noise can first be transmitted radially along the impeller 20 through the ventilation opening 32 of the first air shroud 30, and be transmitted axially along the impeller 20 through the air outlet 41 of the second air shroud 40. The circuitous transmission path can weaken the noise energy transmitted to the atmosphere, realizing the noise improvement of the motor device 100.

[0044] In addition, the motor device 100 can be applied to a floor washer. When the floor washer is working, the motor device 100 can create negative pressure in the floor washer, so as to suck up the garbage on the working surface. During this process, part of the liquid is entrained in the air flow sucked by the motor device 100. The impeller 20 adopts centrifugal blades, and the ventilation opening 32 of the first air shroud 30 can be opposite to the impeller 20 radially. In this way, the liquid entrained in the air flow can be thrown out of the first air shroud 30, avoiding the liquid from eroding the drive assembly 10 through the gap between the impeller 20 and the drive shaft, and improving the working stability of the floor washer. In addition, the ventilation opening 32 can include a plurality of them, and the plurality of ventilation openings 32 can improve the drainage efficiency of the motor device 100, thereby improving the waterproof performance of the motor device 100. Of course, the air outlet 41 can also include a plurality of them, and the plurality of air outlets 41 can improve the air outlet efficiency of the motor device 100, thereby improving the working efficiency of the floor washer.

[0045] Referring to Figure 2 and Figure 3 、 Figure 5 and Figure 6 In some embodiments of the present utility model, a stationary impeller 73 is provided at one end of the second air shroud 40. The stationary impeller 73 is arranged circumferentially along the moving impeller 20, which can reduce the noise level of the motor device 100. Specifically, when the air outlet 41 of the second air shroud 40 discharges air, the air flow can flow through the stationary impeller 73, and the stationary impeller 73 rectifies the air flow to reduce the formation of air flow turbulence, thereby reducing the noise generated during the operation of the motor device 100.

[0046] Referring to Figures 1 to 6 In some embodiments of the present utility model, the air inlet 31 is opposite to the moving impeller 20 along the axis of the moving impeller 20. In other words, when the motor device 100 operates, the air flow can pass through the air inlet 31 along the axial direction of the moving impeller 20. In this way, the turbulence generated when the air flow enters can be reduced, thereby reducing the noise level of the motor device 100.

[0047] In addition, the air outlet 41 is set to discharge air axially along the moving impeller 20, which can reduce the noise level of the motor device 100. Combining the foregoing, it can be understood that the motor device 100 takes in air axially through the air inlet 31, ventilates radially through the ventilation opening 32, and then discharges air axially through the air outlet 41. In other words, a circuitous transmission path is formed in the motor device 100, and the noise energy transmitted to the atmosphere can be weakened through the circuitous transmission path, realizing the noise improvement of the motor device 100.

[0048] In addition, the air inlet direction of the air inlet 31 is the same as the air outlet direction of the air outlet 41, which can contribute to the heat dissipation of the motor device 100, thereby improving the working efficiency of the motor device 100. Specifically, the motor device 100 can generate heat during operation, and the motor device 100 can dissipate heat in the form of air cooling. The air flow enters the motor device 100 through the air inlet 31 and leaves the motor device 100 through the air outlet 41. If the air inlet direction of the air inlet 31 is opposite to the air outlet direction of the air outlet 41, the air inlet side of the air inlet 31 and the air outlet side of the air outlet 41 are on the same side, and the high-temperature air flow discharged from the air outlet 41 can affect the temperature of the air flow at the air inlet 31, thereby affecting the heat dissipation efficiency of the motor device 100. Therefore, the air inlet direction of the air inlet 31 can be the same as the air outlet direction of the air outlet 41 to improve the heat dissipation effect of the motor device 100.

[0049] Referring to Figure 2 and Figure 3 In some embodiments of the present utility model, the ventilation opening 32 is provided on the peripheral wall of the first air shroud 30, and at least a part of the ventilation opening 32 is staggered with the moving impeller 20 along the radial direction of the moving impeller 20. With this setting, the noise level of the motor device 100 can be reduced.

[0050] Specifically, when the motor device 100 is operating, the impeller 20 inside the motor device 100 rotates to generate noise. When the noise is transmitted from the first air hood 30 to the second air hood 40 through the ventilation opening 32, since at least a part of the ventilation opening 32 is offset from the impeller 20 in the radial direction of the impeller 20, the noise cannot be directly transmitted through the ventilation opening 32, so that the noise can be reduced within the first air hood 30, and finally the noise energy transmitted to the atmosphere is reduced, thereby reducing the noise level of the motor device 100.

[0051] Referring to Figure 3 , in some embodiments of the present utility model, the minimum distance L1 between the ventilation opening 32 and the air outlet 41 along the axial direction of the impeller 20 satisfies L1≥5 mm; in this way, the noise can be reduced in the space between the second air hood 40 and the first air hood 30, thereby reducing the noise level of the motor device 100. Among them, the minimum distance L1 can be 5 mm, 7 mm, 10 mm, 20 mm, etc.

[0052] Referring to Figure 3 , in some embodiments of the present utility model, the minimum distance L2 between the ventilation opening 32 and the inner peripheral wall of the second air hood 40 along the radial direction of the impeller 20 satisfies L2≥4 mm; in this way, the noise can be reduced in the space between the second air hood 40 and the first air hood 30, thereby reducing the noise level of the motor device 100. Among them, the minimum distance L2 can be 4 mm, 6 mm, 8 mm, 10 mm, 20 mm, etc.

[0053] Referring to 6, in some embodiments of the present utility model, the impeller 20 is a backward-curved vane type impeller; specifically, the impeller 20 in the motor device 100 adopts a backward-curved vane type impeller, which can improve the working efficiency of the motor device 100, and the air flow is more stable in the blades, thereby reducing the noise level of the motor device 100. It should be added that the bending direction of the blades of the backward-curved vane type impeller is the same as the rotation direction of the impeller 20.

[0054] Referring to Figures 2 to 4 , Figure 6 , in some embodiments of the present utility model, the first air hood 30 includes a guide vane 33. The ventilation opening 32 has a first side and a second side along the rotation direction of the impeller 20. The guide vane 33 is connected to the edge of the first side of the ventilation opening 32 and extends along the rotation direction of the impeller 20; such a setting can guide the air outlet of the first air hood 30 and improve the working efficiency of the motor device 100.

[0055] Specifically, the guide vane 33 has opposite ends. One end of the guide vane 33 is connected to the first side of the ventilation opening 32, and the other end extends along the rotation direction of the impeller 20, so that the bending direction of the guide vane 33 is the same as the rotation direction of the impeller 20. Optionally, when the motor device 100 operates, the impeller 20 can rotate clockwise, and the air flow is driven by the impeller 20 to pass through the ventilation opening 32 in the clockwise direction. At this time, the bending direction of the guide vane 33 connected to the ventilation opening 32 is also clockwise to guide the air flow to pass through the ventilation opening 32, thereby improving the working efficiency of the motor device 100.

[0056] In addition, in some specific examples, in the radial direction of the impeller 20, at least a part of the ventilation opening 32 is opposite to the guide vane 33. The guide vane 33 can block a part of the ventilation opening 32, so that the path of the noise passing through the ventilation opening 32 can be extended, thereby reducing the noise energy and lowering the noise level of the motor device 100.

[0057] Referring to Figure 2 、 Figure 3 and Figure 6 In some embodiments of the present utility model, a first seal 50 is provided on the periphery of the air inlet 31. The first seal 50 seals the gap between the periphery of the air inlet 31 and the impeller 20, which can avoid the waste of energy caused by the air flow backflow, thereby improving the working efficiency of the motor device 100.

[0058] Specifically, in the motor device 100, there is a gap between the periphery of the air inlet 31 and the impeller 20. When the impeller 20 rotates, the air flow can enter from the air inlet 31 of the first air hood 30 and discharge from the ventilation opening 32 of the first air hood 30. During this process, part of the air flow in the first air hood 30 flows back to the air inlet 31 through the gap between the periphery of the air inlet 31 and the impeller 20, resulting in the impeller 20 doing repeated work. Therefore, a first seal 50 can be provided between the periphery of the air inlet 31 and the impeller 20. The first seal 50 seals the gap between the periphery of the air inlet 31 and the impeller 20, avoiding the repeated work of the impeller 20, enabling the air flow to flow along a predetermined path, and improving the working efficiency of the motor device 100.

[0059] Furthermore, a flanging 34 can be connected to the periphery of the air inlet 31. The flanging 34 extends towards the inside of the first air hood 30 along the axis direction of the impeller 20, and the impeller 20 is arranged outside the flanging 34. The first seal 50 can be arranged between the flanging 34 and the periphery of the air inlet 31 and abutted by the impeller 20, thereby improving the sealing effect of the first seal 50.

[0060] Referring to Figures 2 to 6, in some embodiments of the present utility model, the motor device 100 further includes a housing 70. The air inlet 31 is provided at one end of the first air hood 30 along the axis of the moving impeller 20, and the other end of the first air hood 30 along the axis of the moving impeller 20 is sleeved on the outer peripheral surface of the housing 70. In this way, the disassembly and assembly of the motor device 100 can be facilitated, and the maintenance of the motor device 100 is made easier.

[0061] Specifically, the first air hood 30 extends along the axial direction of the moving impeller 20 and has opposite ends. One end of the first air hood 30 is provided with the air inlet 31, and the other end is sleeved on the outer peripheral surface of the housing 70. More specifically, the outer peripheral surface of the housing 70 includes a first surface and a second surface. The first surface is connected to the second surface, and the first surface extends along the circumferential direction of the moving impeller 20, and the second surface extends along the radial direction of the moving impeller 20. The inner side surface of the other end of the first air hood 30 is sleeved on the first surface and has an interference fit with the first surface to improve the structural strength of the motor device 100. And the other end of the first air hood 30 abuts against the second surface, and the first air hood 30 is positioned by the second surface to improve the structural strength of the motor device 100.

[0062] In addition, the housing 70 includes a plate portion 72 and a cylindrical portion 71. The cylindrical portion 71 has opposite ends along the axial direction of the moving impeller 20. The plate portion 72 is connected to one end of the cylindrical portion 71, and the other end of the cylindrical portion 71 is open. The driving assembly 10 can be arranged inside the cylindrical portion 71. The driving shaft of the driving assembly 10 passes through a through hole of the plate portion 72 from one side of the plate portion 72 and passes out from the other side of the plate portion 72. The moving impeller 20 is arranged on the other side of the plate portion 72 and is in transmission connection with the driving shaft. The cylindrical portion 71 can protect the driving assembly 10 to prevent the liquid entrained by the airflow discharged from the air outlet 41 from contaminating the driving assembly 10 and improve the working stability of the motor device 100. Further, the cylindrical portion 71 includes a first portion 711 and a second portion 712. The first portion 711 is connected to the plate portion 72, and the second portion 712 is connected to the first portion 711. The first portion 711 extends along the axial direction of the moving impeller 20, and the second portion 712 inclines away from the driving assembly 10 in the direction from the moving impeller 20 to the driving assembly 10 to guide the airflow discharged from the air outlet 41 away from the driving assembly 10 to further prevent the driving assembly 10 from being contaminated.

[0063] Refer to Figures 2 to 6 , in some embodiments of the present utility model, one end of the second air hood 40 along the axis of the moving impeller 20 is connected to the first air hood 30, and an air outlet 41 is formed between the other end and the housing 70. The housing 70 includes a stationary impeller 73, and the other end of the second air hood 40 is sleeved on the outer peripheral surface of the stationary impeller 73. In this way, the disassembly and assembly of the motor device 100 can be facilitated, and the maintenance of the motor device 100 is made easier.

[0064] Specifically, the housing 70 includes a stationary impeller 73. The stationary impeller 73 is connected to the outer peripheral surface of the cylindrical portion 71. The second air hood 40 extends along the axial direction of the moving impeller 20 and has opposite ends. One end of the second air hood 40 is connected to the first air hood 30, and an air outlet 41 is formed between the other end and the cylindrical portion 71. Moreover, the other end of the second air hood 40 is sleeved on the outer peripheral surface of the stationary impeller 73 to facilitate the disassembly and assembly of the motor device 100. In addition, a second seal 60 is provided between one end of the second air hood 40 and the first air hood 30. The second seal 60 can improve the sealing performance of the motor device 100 and prevent it from affecting the normal operation of the floor washer.

[0065] More specifically, the outer peripheral surface of the stationary impeller 73 includes a third surface and a fourth surface. The third surface is connected to the fourth surface, and the third surface extends along the axial direction of the moving impeller 20, while the fourth surface extends along the radial direction of the moving impeller 20. During assembly, the inner side surface of the other end of the second air hood 40 can be sleeved on the third surface and has an interference fit with the third surface to improve the structural strength of the motor device 100. Also, the other end of the second air hood 40 abuts against the fourth surface, and the second air hood 40 is positioned by the fourth surface to improve the structural strength of the motor device 100.

[0066] Referring to Figure 5 and Figure 6 , in some embodiments of the present utility model, the stationary impeller 73 includes a plurality of stationary blades 731 distributed circumferentially along the moving impeller 20. There is a gap between adjacent stationary blades 731, and the stationary blades 731 are set to be parallel to the axis of the moving impeller 20 or at least a part of them is inclined to the axis of the impeller. Thus, the stationary impeller 73 can guide the airflow at the air outlet 41 to be discharged, reduce the noise level of the motor device 100, and improve the working efficiency of the motor device 100.

[0067] In detail, an air outlet 41 is formed between the other end of the second air hood 40 and the cylindrical portion 71 of the housing 70. The air outlet 41 is axially opposite to the stationary impeller 73 along the moving impeller 20. After the airflow is discharged from the air outlet 41, it can pass through the rectifying and guiding effects of the stationary impeller 73 to achieve noise reduction and airflow discharge.

[0068] Among them, the stationary impeller 73 includes a plurality of stationary blades 731 and a support frame 732. The support frame 732 is provided on the outer peripheral surface of the cylindrical portion 71 and extends circumferentially along the moving impeller 20. The plurality of stationary blades 731 are circumferentially distributed along the moving impeller 20. One end of the plurality of stationary blades 731 is connected to the outer peripheral surface of the cylindrical portion 71, and the other end is connected to the radially inner side surface of the support frame 732. The radially outer side surface of the support frame 732 includes the aforementioned third surface and fourth surface to achieve the assembly and cooperation with the second air hood 40. In addition, there is a gap between two adjacent stationary blades 731 among the plurality of stationary blades 731, and this gap is axially opposite to the air outlet 41 along the moving impeller 20 to guide the airflow at the air outlet 41 to blow out axially along the moving impeller 20.

[0069] In addition, the stationary blade 731 can be parallel to the axis of the impeller 20 to guide the axial air outlet of the motor device 100; or at least a part of the stationary blade 731 is inclined to the axis of the impeller, so as to guide the air flow discharged from the air outlet 41 to flow away from the driving assembly 10, avoiding the liquid carried in the air flow from contaminating the driving assembly 10.

[0070] Referring to Figures 1 to 6 , according to the floor washer in the embodiments of the present utility model, the floor washer includes a body and the motor device 100 in the above embodiments, and the motor device 100 is arranged in the body; by applying the aforementioned motor device 100, the noise level of the floor washer can be reduced, and the waterproof performance of the floor washer can be improved, thereby improving the user experience.

[0071] Specifically, when the motor device 100 is applied to a floor washer, the air inlet 31 of the motor device 100 can be connected to the body to create a negative pressure area in the temporal part of the body, so as to realize the suction cleaning of the working surface by the body; during this process, the rotation of the impeller 20 generates noise and transmits it to the atmosphere, affecting the user experience; therefore, the motor device 100 in the embodiments of the present utility model includes a first air hood 30 and a second air hood 40. The first air hood 30 covers the outside of the impeller 20, and the second air hood 40 covers the outside of the first air hood 30, so that the transmission path of the noise inside the motor device 100 can be extended, thereby weakening the noise energy transmitted to the atmosphere and realizing the improvement of the noise of the motor device 100.

[0072] Furthermore, the first air hood 30 is provided with an air inlet 31 and a ventilation opening 32, the second air hood 40 is provided with an air outlet 41, the air inlet 31 is provided with axial air inlet, the air outlet 41 is set as axial air outlet, and the ventilation opening 32 is set as radial ventilation, so as to form a circuitous noise transmission path inside the motor device 100, so that the noise can be further reduced in the first air hood 30 and the second air hood 40, thereby weakening the noise energy transmitted from the motor device 100 to the atmosphere. In addition, the air inlet direction of the air inlet 31 is the same as the air outlet direction of the air outlet 41 to improve the heat dissipation effect of the motor device 100. In addition, in the radial direction of the impeller 20, at least a part of the ventilation opening 32 is staggered from the impeller 20, so that the noise generated by the impeller 20 cannot be directly transmitted through the ventilation opening 32, extending the distance of noise transmission, thereby reducing the noise level of the motor device 100.

[0073] Among them, in the axial direction of the impeller 20, the minimum distance L1 between the ventilation opening 32 and the air outlet 41 is ≥5 mm; and in the radial direction of the impeller 20, the minimum distance L2 between the ventilation opening 32 and the inner peripheral wall of the second air hood 40 is ≥4 mm, which can reduce the noise level of the motor device 100.

[0074] Furthermore, a guide vane 33 is connected to the first side of the ventilation opening 32 along the rotation direction of the impeller 20. The guide vane 33 extends along the rotation direction of the impeller 20 to guide the airflow from the ventilation opening 32 to be discharged evenly, so as to reduce the noise level of the motor device 100. In addition, a first seal 50 is provided in the gap between the periphery of the air inlet 31 and the impeller 20 to improve the working efficiency of the motor device 100.

[0075] Still further, the motor device 100 further includes a housing 70. The housing 70 includes a cylindrical portion 71, a plate portion 72 and a stationary impeller 73. The cylindrical portion 71 has opposite ends along the axial direction. The plate portion 72 is connected to one end of the cylindrical portion 71. The driving assembly 10 is disposed inside the cylindrical portion 71, and the driving shaft of the driving assembly 10 is in transmission connection with the impeller 20 through the through hole of the plate portion 72. The driving assembly 10 is prevented from being contaminated and eroded by the cylindrical portion 71. The stationary impeller 73 is connected to the outer peripheral surface of the cylindrical portion 71. The first air hood 30 is sleeved on the outer peripheral surface of the cylindrical portion 71. The second air hood 40 is sleeved on the outer peripheral surface of the stationary impeller 73, which is convenient for the disassembly and assembly of the motor device 100. In addition, the stationary impeller 73 can guide the airflow at the air outlet 41 to flow out axially and straighten the airflow at the air outlet 41, thereby reducing the noise level of the motor device 100.

[0076] The wet and dry motor (i.e., the motor device 100) in the embodiment of the present utility model includes two-stage air hoods. The first-stage air hood is an air hood with openings on the peripheral wall (i.e., the first air hood 30), and the second-stage air hood is an air hood without openings on the peripheral wall (i.e., the second air hood 40); wherein, the open-type air hood means that there is a ventilation opening 32 on the side of the air hood, and the non-open air hood means that there is no ventilation opening 32 on the side of the air hood. During the operation of the impeller 20, water vapor or water droplets will be inhaled. Most of the water will enter before the first-stage air hood and the second-stage air hood through the open air hood, and then be discharged along with the guide vanes (i.e., the stationary vanes 731) in the housing 70. A small part of the water is rebounded into the interior of the motor device 100. Since the connection between the driving assembly 10 and the impeller 20 is designed for waterproofing, the small amount of rebounded water has basically no impact on the failure of the motor. Therefore, the waterproof performance of the motor can be guaranteed by this utility model.

[0077] In addition, in terms of noise improvement: In the related art, the noise at the impeller 20 is transmitted to the atmosphere through the ventilation opening 32 of the first-stage air hood and is heard by the human ear. The sound has no consumption and high energy, resulting in a poor listening experience. In the embodiment of the present utility model, a part of the noise is transmitted to the atmosphere through the second-stage air hood, and the second-stage air hood can be made of a metal material with a relatively high density, which weakens the penetration of the sound, resulting in the weakening of the energy of the sound penetrating out. Another part of the noise needs to be reflected by the second-stage air hood and the guide vanes (i.e., the stationary vanes 731) of the housing 70 and then transmitted to the atmosphere. The transmission path of the sound becomes longer, and the energy transmitted to the atmosphere will also be weakened. Finally, the noise of the motor device 100 is improved.

[0078] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0080] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0081] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A motor device, characterized in that, Comprising: A drive assembly (10), the drive assembly (10) having a drive shaft; A moving impeller (20), the moving impeller (20) being connected to the drive shaft; A first air hood (30), the first air hood (30) covering the outside of the moving impeller (20) and provided with an air inlet (31) and a ventilation opening (32); A second air hood (40), the second air hood (40) covering the outside of the first air hood (30) and provided with an air outlet (41) communicating with the ventilation opening (32).

2. The motor device according to claim 1, characterized in that, The air outlet (41) is offset from the ventilation opening (32).

3. The motor device according to claim 2, characterized in that, The ventilation opening (32) is provided on the peripheral wall of the first air hood (30), and the air outlet (41) is provided at one end of the second air hood (40) along the axis direction of the moving impeller (20).

4. The electric machine device according to claim 3, characterized in that, A stationary impeller (73) is provided at the said one end of the second air hood (40), and the stationary impeller (73) is arranged circumferentially along the moving impeller (20).

5. The motor device according to claim 1, characterized in that, The air inlet (31) faces the moving impeller (20) along the axis of the moving impeller (20); and / or, the air outlet (41) is configured to discharge air axially along the moving impeller (20); and / or, the air inlet direction of the air inlet (31) is the same as the air outlet direction of the air outlet (41).

6. The motor device according to claim 1, characterized in that, The ventilation opening (32) is provided on the peripheral wall of the first air hood (30), and at least a part of the ventilation opening (32) is offset from the moving impeller (20) radially along the moving impeller (20).

7. The electric machine device according to any one of claims 1-6, characterized in that, The minimum distance L1 between the ventilation opening (32) and the air outlet (41) along the axial direction of the moving impeller (20) satisfies L1≥5mm; and / or, the minimum distance L2 between the ventilation opening (32) and the inner peripheral wall of the second air hood (40) along the radial direction of the moving impeller (20) satisfies L2≥4mm.

8. The electric machine device according to any one of claims 1-6, characterized in that, The moving impeller (20) is configured as a backward-curved blade impeller; and / or, the first air hood (30) includes guide vanes (33), the ventilation opening (32) has a first side and a second side along the rotation direction of the moving impeller (20), and the guide vanes (33) are connected to the edge of the first side of the ventilation opening (32) and extend along the rotation direction of the moving impeller (20); and / or, a first seal (50) is provided on the periphery of the air inlet (31), and the first seal (50) seals the gap between the periphery of the air inlet (31) and the moving impeller (20).

9. The motor device according to claim 1, wherein The motor device further includes a housing (70), the air inlet (31) is provided at one end of the first air hood (30) along the axis of the moving impeller (20), and the other end of the first air hood (30) along the axis of the moving impeller (20) is sleeved on the outer peripheral surface of the housing (70).

10. The motor device according to claim 9, characterized in that, One end of the second air hood (40) along the axis of the moving impeller (20) is connected to the first air hood (30), and an air outlet (41) is formed between the other end and the housing (70), the housing (70) includes a stationary impeller (73), and the said other end of the second air hood (40) is sleeved on the outer peripheral surface of the stationary impeller (73).

11. The motor device according to claim 4 or 10, characterized in that, The stationary impeller (73) includes a plurality of stationary vanes (731) circumferentially distributed along the moving impeller (20), and a gap is provided between adjacent stationary vanes (731). The stationary vanes (731) are arranged parallel to the axis of the moving impeller (20) or at least a part thereof is inclined with respect to the axis of the impeller.

12. A floor washer, characterized in that, Comprising: A body; The motor device according to any one of claims 1-11, the motor device being provided in the body.

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