A dry and wet dual-purpose motor and a dust collector

Abstract

The application relates to a dry-wet dual-purpose motor and a dust collector, and belongs to the technical field of dust collector motors. The dry-wet dual-purpose motor comprises a guide wheel and a wind cover, the wind cover is sleeved on the guide wheel, an airflow channel is arranged on the guide wheel, the airflow channel comprises an airflow inlet and an airflow outlet, an air inlet is arranged on one side of the wind cover close to the airflow inlet, airflow enters the airflow inlet through the air inlet, and the airflow is released from the airflow outlet along the central axis direction of the air inlet, the guide wheel comprises an outer shell, an inner shell and at least two guide vanes arranged between the outer shell and the inner shell to connect the outer shell and the inner shell, the airflow channel is formed between the outer shell and the inner shell, the projection of the inner shell along the central axis direction of the motor is located outside the projection range of the motor along the central axis direction of the motor, the guide vanes are spiral arc plates, and the guide vanes are arranged in a radial direction of the inner shell in an inclined mode. The application has the effect of reducing the generation of noise when the dry-wet dual-purpose motor operates.

Description

Technical Field

[0001] This application relates to the field of vacuum cleaner motors, and in particular to a wet / dry motor and a vacuum cleaner. Background Technology

[0002] A vacuum cleaner is a household appliance used to remove dust and debris. The high-speed rotation of the vacuum cleaner motor generates a high-speed airflow that draws debris into a dustbin inside the vacuum cleaner through the suction inlet.

[0003] The vacuum cleaner motor is the heart of the vacuum cleaner. The vacuum cleaner motor drives the blades to rotate at high speed, creating negative air pressure inside the sealed housing, thereby achieving the purpose of vacuum cleaner to pick up dust and debris.

[0004] A wet / dry motor is a type of vacuum cleaner motor. Its characteristic is that the electromagnetic working part is separated from the output end of the rotating shaft. During use, water will not enter the motor structure. This ensures the motor's operation without causing dryness limitations. Therefore, it can clean or treat water, dust, impurities, etc. at the same time.

[0005] The wet / dry motor includes a motor and a fan connected to the motor. When the motor rotates, it drives the fan to rotate at high speed, which in turn creates negative pressure at the air inlet, forming suction. The fan includes a moving impeller connected to the motor and rotating at high speed to generate air, a fan shroud surrounding the moving impeller to gather the air, and a guide wheel that allows the air volume generated by the moving impeller to be smoothly released from the fan shroud.

[0006] Typically, the design of the fan section involves radially opening ventilation holes on the outer wall of the fan cover, allowing air to be released from the ventilation holes after passing through the guide vane.

[0007] Regarding the aforementioned technologies, the inventors believe that when the impeller rotates at high speed, the wind speed is high, and therefore the wind energy is high. When the wind is released from the ventilation holes, since the wind energy is not greatly lost, the wind will collide with the wind shield, thus generating noise. Summary of the Invention

[0008] In order to reduce the noise generated during the operation of a wet and dry motor, this application provides a wet and dry motor.

[0009] This application provides a dry / wet dual-purpose motor, which adopts the following technical solution:

[0010] A dry and wet dual-purpose motor includes a guide vane and a fan cover, wherein the fan cover is sleeved on the guide vane;

[0011] The air guide wheel is provided with an airflow channel, which includes an airflow inlet and an airflow outlet.

[0012] An air inlet is provided on the side of the shroud near the airflow inlet. Airflow enters the airflow inlet through the air inlet, and the airflow is released from the airflow outlet along the central axis of the air inlet.

[0013] The wind guide wheel includes an outer shell, an inner shell, and at least two wind guide blades located between the outer shell and the inner shell to connect the two to each other.

[0014] The airflow channel is formed between the outer shell and the inner shell, and the projection of the inner shell along the direction of the motor's central axis is outside the projection range of the motor along its own central axis.

[0015] The air guide blade is a spiral arc plate, and the air guide blade is arranged radially along the inner shell.

[0016] By adopting the above technical solution, the airflow enters the interior of the fan shroud from the air inlet and then enters the airflow inlet. It is then released vertically from the airflow outlet from the side opposite to the air inlet. Since the inner shell is larger than the motor, the airflow does not collide with other components on the motor after being released from the airflow outlet, but is released directly, thereby reducing noise generation.

[0017] Meanwhile, multiple guide vanes divide the airflow channel into multiple segments, dispersing the airflow through the channel into multiple streams, thus reducing the wind energy released and minimizing noise.

[0018] The guide vanes are spiral arc-shaped plates. On one hand, the arc shape of the vanes provides a buffering transition for the airflow, consuming some of its energy and reducing its release energy, thus minimizing noise. On the other hand, the spiral shape increases the time the airflow spends in the airflow channel and guides it towards the outer wall of the inner shell. This friction between the airflow and the outer wall further reduces its energy after passing through the airflow channel, resulting in lower noise. Furthermore, the spiral design of the guide vanes increases the airflow rate within the airflow channel, enhancing the vacuum level and minimizing fan wear, thereby improving the fan's efficiency.

[0019] The fan cover wraps around the outside of the air guide wheel. On the one hand, it increases the contact area between the fan cover and the air guide wheel, making the fan cover more stable after installation. On the other hand, the fan cover plays a role in concentrating the air, which can reduce noise and ensure the vacuum at the air inlet.

[0020] Optionally, the shroud is fitted onto the outer wall of the outer shell, and the airflow inlet is provided with a guide surface to guide the airflow into the airflow channel.

[0021] Optionally, the guide vane includes a first inclined surface that allows airflow to conform to the inner shell within the airflow channel and / or a second inclined surface that facilitates airflow entering the airflow channel.

[0022] By adopting the above technical solution, the airflow will diffuse towards the inner peripheral wall of the wind shroud after entering it. At this time, the airflow can be guided into the airflow channel through the guiding surface.

[0023] The first inclined surface guides the airflow so that it adheres to the outer wall of the inner shell as it passes through the airflow channel. During the movement, the airflow rubs against the outer wall of the inner shell, consuming the wind energy of the airflow. This results in the wind energy released by the airflow being lower than the wind energy when the airflow enters, thereby reducing the generation of noise.

[0024] The air pressure at the air inlet tends to stabilize. The setting of the second inclined surface increases the airflow at the air inlet, allowing the airflow entering from the air inlet to quickly enter the air inlet and be released through the air outlet. This allows the airflow to be released more smoothly while ensuring the vacuum at the air inlet.

[0025] Optionally, the wind guide wheel further includes an air distribution plate, which is disposed on the wind guide blade and extends along the curvature of the wind guide blade.

[0026] By adopting the above technical solution, the air distribution plate extends along the arc of the guide vanes, that is, the air distribution plate extends from the air inlet to the air outlet. After the air enters the air inlet, it is dispersed into multiple small airflows by the guide vanes. Each small airflow is further dispersed into multiple even smaller airflows by the air distribution plate. Throughout the process until the airflow is released from the air outlet, it continuously rubs against the air distribution plate, thereby consuming the wind energy of the airflow. This reduces the wind energy when the airflow is released, making it less likely to generate wind noise.

[0027] Optionally, the guide vane includes a fixed vane that fixes the outer shell to the inner shell and a movable vane that is rotatably connected to the fixed vane, the movable vane being located on the side of the fixed vane near the airflow outlet.

[0028] By adopting the above technical solution, the airflow size in the airflow channel is different for different motor speeds. The fixed blades first guide the airflow from the airflow inlet into the airflow channel. When the airflow moves to the position of the moving blades, the moving blades can automatically adjust the tilt angle slightly according to the airflow size, guiding the airflow towards the outer wall of the inner shell. This allows the airflow to fit against the outer wall of the inner shell to the maximum extent when passing through the airflow channel, generating friction with the outer wall of the inner shell, thereby reducing the wind energy when the airflow is released.

[0029] Optionally, the moving blade is made of an elastic material.

[0030] By adopting the above technical solution, when the airflow received by the moving blade is greater than its own stable value, the moving blade will tilt relative to the fixed blade. When the airflow decreases and is less than the moving blade's own stable value, the moving blade will return to its initial state under its own elastic action, thereby making the airflow flow more smoothly in the airflow channel.

[0031] Optionally, the rotating blades guide the airflow toward the direction closer to the outer wall of the inner shell.

[0032] By adopting the above technical solution, when the airflow in the airflow channel increases, the airflow will be guided by the moving blades to fit more closely to the outer wall of the inner shell, which will further cause friction between the airflow and the outer wall of the inner shell, thereby consuming the wind energy of the airflow, and further reducing the wind energy of the airflow released from the airflow outlet, making it less likely to generate wind noise.

[0033] Optionally, the two opposite sides of the moving blade abut against the outer shell and the inner shell respectively before and after rotation.

[0034] By adopting the above technical solution, if there is a gap between the moving blade and the outer or inner shell, on the one hand, when the airflow passes through the airflow channel, the airflow will erratically move around on both sides of the guide blade through the gap, resulting in different airflow rates on both sides, which will inevitably generate a larger airflow and thus produce slight wind noise; on the other hand, if the gap is small, then when the airflow erratically moves around in the gap, it will produce sharp wind noise. Therefore, the moving blade abuts against the outer and inner shells before and after rotation, thereby reducing the generation of wind noise.

[0035] Optionally, the airflow channel gradually increases in size along the direction from the airflow inlet to the airflow outlet.

[0036] By adopting the above technical solution, since the inner diameter of the airflow channel at the airflow outlet is larger than that at the airflow inlet, the airflow can disperse more quickly when it is released from the airflow outlet, and it is not easy for the airflow to gather at the airflow outlet.

[0037] Secondly, this application provides a vacuum cleaner, which adopts the following technical solution:

[0038] A vacuum cleaner equipped with the aforementioned wet / dry motor.

[0039] By adopting the above technical solution, the vacuum cleaner operates with less noise.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] Airflow enters the airflow channel through the air inlet and exits vertically from the side opposite to the air inlet. Simultaneously, the inner casing is larger than the motor, minimizing the risk of airflow colliding with the motor and generating noise. The guide vanes are spiral arc-shaped plates, radially inclined relative to the inner casing, thus buffering the airflow. The guide vanes also create friction between the airflow and the inner casing, reducing airflow energy and consequently minimizing noise generation.

[0042] The airflow channel is first split by the guide vanes to form multiple small airflow channels. The setting of the air distribution plate further splits the small airflow channels into more and smaller airflow channels, so that the airflow is dispersed into multiple small airflows and released, thereby reducing the risk of generating wind noise.

[0043] The motor can adjust the speed according to the suction power required by the vacuum cleaner. The air guide blades include fixed blades and moving blades. When the airflow in the airflow channel is strong, the moving blades will automatically rotate to guide the airflow towards the outer wall of the inner shell, so that the airflow and the outer shell will generate friction, which will consume the wind energy of the airflow and thus reduce wind noise. At the same time, when the airflow decreases, the moving blades can be restored to the state before rotation by the rebound column. That is, the moving blades can adaptively adjust the rotation angle according to the airflow size. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the dry and wet dual-purpose motor in the embodiments of this application.

[0045] Figure 2 This is a cross-sectional view of the dry and wet dual-purpose motor in the embodiments of this application (the direction of the arrow in the figure indicates the direction of airflow).

[0046] Figure 3 This is a schematic diagram of the overall structure of the wind guide wheel in the embodiments of this application.

[0047] Figure 4 This is a schematic diagram of the overall structure of the wind guide wheel from another angle in an embodiment of this application.

[0048] Figure 5 This is a schematic diagram of the overall structure of an embodiment of the wind guide wheel including the wind distribution plate in this application.

[0049] Figure 6 This is a schematic diagram of the overall structure of the guide vanes and air distribution plates in this application.

[0050] Figure 7 This is a schematic diagram of the overall structure of the wind turbine in an embodiment of the wind turbine blades in this application, which includes fixed blades and moving blades.

[0051] Figure 8 This is a schematic diagram of the overall structure of the fixed blade and the moving blade in this application.

[0052] Figure 9 This is a schematic diagram of the overall structure of the fixed blade, moving blade and air distribution plate in this application.

[0053] Explanation of reference numerals in the attached drawings: 1. Motor body; 2. Moving impeller; 3. Guide vane; 31. Airflow channel; 311. Airflow inlet; 312. Airflow outlet; 313. Guide surface; 32. Outer shell; 33. Inner shell; 34. Guide vane; 341. First inclined surface; 342. Second inclined surface; 343. Fixed blade; 344. Moving blade; 35. Air distribution plate; 4. Air cover; 41. Air inlet. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0055] This application discloses a dry / wet dual-purpose motor. (Refer to...) Figure 1 and Figure 2 The wet / dry dual-purpose motor includes a motor body 1, a moving impeller 2, a guide vane 3, and a fan shroud 4. The guide vane 3 is located between the motor body 1 and the moving impeller 2 and is fixedly mounted on the motor body 1. The fan shroud 4 can be interference-fitted onto the outer peripheral wall of the guide vane 3, or it can be fixed to the outer peripheral wall of the guide vane 3 with screws. In this embodiment, the fan shroud 4 is preferably interference-fitted onto the outer peripheral wall of the guide vane 3. The moving impeller 2 is located inside the fan shroud 4 and is rotatably connected to the motor body 1. The guide vane 3 is provided with an airflow channel 31 for airflow passage. The airflow channel 31 includes an airflow inlet 311 and an airflow outlet 312. The fan shroud 4 has an air inlet 41 connected to the airflow inlet 311 on the side near the airflow inlet 311. Airflow enters the air inlet 311 at the air inlet 41, and the airflow is released from the air outlet 312 from the side away from the air inlet 41 along the central axis of the air inlet 41. When the airflow is released, it is not easy to collide with the motor body 1 and the fan cover 4, thereby reducing the risk of noise generated by the dry and wet dual-purpose motor during operation.

[0056] The airflow channel 31 gradually increases in size from the airflow inlet 311 to the airflow outlet 312. On the one hand, this allows the airflow to be released and dispersed more quickly from the airflow outlet 312. On the other hand, since the guide wheel 3 is generally an injection molded part, the above structure can serve as a draft angle, facilitating the removal of the guide wheel 3.

[0057] Reference Figure 2The guide vane 3 includes an outer shell 32, an inner shell 33, and guide vanes 34. Since the outer shell 32 and inner shell 33 are mostly circular, this embodiment uses circular shells for both. The centerline of the outer shell 32 coincides with the centerline of the inner shell 33, and the shroud 4 is interference-fitted onto the outer wall of the outer shell 32. A cavity is formed between the outer shell 32 and the inner shell 33, which serves as the airflow channel 31 in this example. The projection of the motor body 1 along the centerline of the inner shell 33 is located within the diameter of the inner shell 33, thus reducing the likelihood of airflow colliding with the motor body 1. The guide vanes 34 are disposed within the airflow channel 31 to divide it into multiple segments, thereby dispersing the airflow within the shroud 4 into multiple smaller airflows and releasing them, reducing the wind energy released during airflow. The outer shell 32 and inner shell 33 are connected by the guide vanes 34. Preferably, the outer shell 32, inner shell 33, and guide vanes 34 are integrally formed in this embodiment. At least two guide vanes 34 are provided, and multiple guide vanes 34 have the same structure. The multiple guide vanes 34 are arranged at intervals along the outer wall of the inner shell 33 within the airflow channel 31, thereby dividing the airflow channel 31 into multiple smaller channels. The following description uses one guide vane 34 as an example.

[0058] The guide vane 34 is a spiral arc plate, that is, the guide vane 34 is a concave arc plate that is slightly twisted towards the inner shell 33 and gradually decreases in height along the direction from the air outlet 312 to the air inlet 311. This serves as a buffer for the airflow passing through the airflow channel 31. At the same time, the arc plate prolongs the time that the airflow passes through the airflow channel 31, so that the wind energy when the airflow is released is reduced compared to when it enters the airflow channel 31, and the wind noise is reduced.

[0059] Reference Figure 2 and Figure 3 The guide vane 34 includes a first inclined surface 341 and a second inclined surface 342. The first inclined surface 341 is inclined towards the inner shell 33 between the outer shell 32 and the inner shell 33, thereby guiding the airflow towards the inner shell 33. This allows the airflow to adhere to the outer wall of the inner shell 33, generating friction and consuming the airflow energy, further reducing wind noise when the airflow is released. The second inclined surface is inclined towards the outer shell 32 between the outer shell 32 and the inner shell 33, increasing the size of the airflow inlet 311. The air pressure at the air inlet 41 is a stable value, thereby increasing the airflow rate at the airflow inlet 311. Guided by the second inclined surface 342, the airflow can quickly enter the airflow channel 31. As can be seen from the above, the first inclined surface 341 is the concave curved surface of the guide vane 34, and the second inclined surface 342 is the convex curved surface of the guide vane 34.

[0060] Reference Figure 3 and Figure 4The guide vane 34 may include only the first inclined surface 341, or only the second inclined surface 342, or both the first inclined surface 341 and the second inclined surface 342. In this embodiment, it is preferred to include both the first inclined surface 341 and the second inclined surface 342.

[0061] It is worth noting that the guide vanes 34 are radially inclined within the airflow channel 31 along the inner shell 33, thereby allowing the first inclined surface 341 to guide the airflow towards the outer wall of the inner shell 33 to a greater extent, and the second inclined surface 342 to maximize the airflow rate at the airflow inlet 311. Simultaneously, a guide surface 313 is provided on the side of the airflow inlet 311 near the outer shell 32, and the guide surface 313 is inclined towards the inner shell 33. The guide surface 313 and the second inclined surface 342 cooperate with each other, making it easier for the airflow to enter the airflow channel 31.

[0062] In addition, the multiple air guide vanes 34 are arranged in a spiral shape, which reduces the risk of turbulence caused by collisions between multiple air streams after they are released. At the same time, it allows multiple air streams to be released smoothly, reducing noise generation.

[0063] Reference Figure 5 and Figure 6 In another embodiment, the wind deflector 3 further includes a wind deflector 35, which extends along the arc of the wind deflector blade 34 and is integrally formed with the wind deflector blade 34. After the airflow channel 31 is divided into multiple segments by the wind deflector blade 34, each segment of the airflow channel 31 is further divided by the wind deflector 35, thereby dividing the airflow inside each segment of the airflow channel 31 into multiple smaller airflows, reducing the wind energy of each smaller airflow and reducing noise generation.

[0064] Reference Figure 2 and Figure 5 Furthermore, the air distribution plate 35 is a spiral arc-shaped plate, meaning that one side of the air distribution plate 35 is attached to the arc surface of the guide vane 34, and the air distribution plate 35 gradually twists towards the outer shell 32 along the direction from the airflow inlet 311 to the airflow outlet 312. Through this structure, the air distribution plate 35 can guide the airflow, allowing it to be released relatively smoothly. When the airflow moves within the airflow channel 31, it will rub against the air distribution plate 35, reducing the airflow energy and thus reducing noise. At least one air distribution plate 35 is provided. When there is only one air distribution plate 35, there are channels for airflow to pass through between the air distribution plate 35 and both the outer shell 32 and the inner shell 33. When multiple air distribution plates 35 are provided, they are arranged at intervals between the outer shell 32 and the inner shell 33. In this embodiment, two air distribution plates 35 are preferably provided, arranged at intervals between the outer shell 32 and the inner shell 33.

[0065] Reference Figure 5 and Figure 6 The air distribution plate 35 can be disposed on the first inclined surface 341, the second inclined surface 342, or both. When the air distribution plate 35 is disposed on the first inclined surface 341, it causes the airflow near the air outlet 312 close to the first inclined surface 341 to form multiple small airflows, thereby reducing the wind energy of the airflow. When the air distribution plate 35 is disposed on the second inclined surface 342, it causes the airflow near the air outlet 312 close to the second inclined surface 342 to form multiple small airflows, thereby reducing the wind energy of the airflow. When air distribution plates 35 are disposed on both the first inclined surface 341 and the second inclined surface 342, the airflow close to the first inclined surface 341 will collide with the airflow close to the second inclined surface 342, generating turbulence and thus consuming wind energy. Considering the shape of the guide vane 34, this embodiment preferably disposes of the air distribution plate 35 on the first inclined surface 341.

[0066] Reference Figure 7 and Figure 8 In another embodiment, the guide vane 34 includes a fixed vane 343 and a movable vane 344. The fixed vane 343 is located on the side opposite to the airflow outlet 312, and the fixed vane 343, the outer shell 32, and the inner shell 33 are integrally formed. The movable vane 344 is located on the side of the fixed vane 343 closer to the airflow outlet 312, and the movable vane 344 is integrally formed with the fixed vane 343. The movable vane 344 is made of an elastic material.

[0067] Reference Figure 7 and Figure 8 When the rotational speed of the motor body 1 is different, the airflow magnitude also varies. When the airflow is large, the fixed blade 343 will adaptively tilt towards the outer peripheral wall of the inner shell 33, guiding the airflow towards the outer peripheral wall of the inner shell 33 to the maximum extent. This allows the airflow to adhere to and rub against the outer peripheral wall of the inner shell 33, resulting in lower wind energy released and less wind noise. When the airflow decreases to the static value of the moving blade, that is, when the wind energy of the airflow is insufficient to make the moving blade rotate, the moving blade 344 automatically returns to its pre-rotation state under its own elastic action.

[0068] During the rotation of the aforementioned moving blade 344, the moving blade 344 is always in contact with the outer shell 32 and the inner shell 33, making it difficult for gaps to be generated between the moving blade 344 and the outer shell 32 or the inner shell 33, thereby reducing the risk of generating harsh wind noise.

[0069] Reference Figure 9Furthermore, the air distribution plate 35 can be installed solely on the fixed blade 343, solely on the moving blade 344, or on both the fixed blade 343 and the moving blade 344. When the air distribution plate 35 is installed on both the fixed blade 343 and the moving blade 344, the air distribution plate 35 on the fixed blade 343 is not connected to the air distribution plate 35 on the moving blade 344, so that when the moving blade 344 rotates, the air distribution plate 35 on the moving blade 344 can also rotate with the moving blade 344.

[0070] The implementation principle of a dry / wet dual-purpose motor in this application embodiment is as follows: After the airflow enters the airflow channel 31 from the air inlet 41, it will be released along the centerline of the air inlet 41 to the side away from the air inlet 41, thus making it less likely to collide with the fan cover 4 and the motor body 1 and generate noise. At the same time, the airflow in the airflow channel 31 will rub against the outer peripheral wall of the inner shell 33 under the guidance of the guide vanes 34, thereby reducing some of the wind energy. The wind energy of the airflow released from the airflow outlet 312 is lower than that of the airflow entering the airflow channel 31 from the airflow inlet 311, thereby reducing the risk of wind noise generated by the airflow itself.

[0071] In addition, this application also discloses a vacuum cleaner, including a vacuum cleaner body and a wet / dry motor as described in the above embodiments. The wet / dry motor is fixedly installed on the vacuum cleaner body, and the specific fixing position can be selected according to the actual situation of the type of vacuum cleaner.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dry and wet dual-purpose motor, characterized in that: The fan wheel (3) and the fan cover (4) are provided, and the fan cover (4) is sleeved on the fan wheel (3); The fan wheel (3) is provided with an airflow channel (31), and the airflow channel (31) comprises an airflow inlet (311) and an airflow outlet (312); The fan cover (4) is provided with an air inlet (41) on one side close to the airflow inlet (311), and the airflow enters the airflow inlet (311) through the air inlet (41), and the airflow is released from the airflow outlet (312) along the central axis direction of the air inlet (41); The fan wheel (3) comprises an outer shell (32), an inner shell (33), and at least two guide vanes (34) located between the outer shell (32) and the inner shell (33) to connect them to each other; The airflow channel (31) is formed between the outer shell (32) and the inner shell (33), and the projection of the inner shell (33) in the motor central axis direction is located outside the projection range of the motor in the motor central axis direction; The guide vane (34) is a spiral arc plate, and the guide vane (34) is inclined along the radial direction of the inner shell (33); The fan wheel (3) further comprises a wind distribution plate (35), and the wind distribution plate (35) is arranged on the guide vane (34) and extends along the arc of the guide vane (34); The guide vane (34) comprises a fixed vane (343) fixedly connected with the outer shell (32) and the inner shell (33), and a movable vane (344) rotatably connected with the fixed vane (343), and the movable vane (344) is located on one side of the fixed vane (343) close to the airflow outlet (312); The movable vane (344) is made of elastic material; The movable vane (344) guides the airflow to the direction close to the outer wall of the inner shell after rotation.

2. A wet / dry electric motor according to claim 1, characterized in that: The fan cover (4) is sleeved on the outer wall of the outer shell (32), and a guide surface (313) for guiding the airflow into the airflow channel (31) is arranged at the airflow inlet (311).

3. A wet / dry electric motor according to claim 1, wherein: The guide vane (34) comprises a first inclined surface (341) for making the airflow adhere to the inner shell (33) in the airflow channel (31) and / or a second inclined surface (342) for facilitating the airflow to enter the airflow channel (31).

4. The wet / dry electric motor of claim 1, wherein: The movable vane (344) abuts against the outer shell (32) and the inner shell (33) on the opposite sides before and after rotation.

5. The wet / dry electric motor of claim 1, wherein: The airflow channel (31) gradually increases in the direction from the airflow inlet (311) to the airflow outlet (312).

6. A vacuum cleaner characterised by: A dry-wet dual-purpose motor comprising any one of claims 1-5.

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