Vacuuming device and vacuum cleaner having the same

Abstract

The present invention discloses a dust suction device and a vacuum cleaner having the same. The dust suction device includes: a housing, an impeller assembly, a filter assembly, and a limiting assembly. An installation space is formed inside the housing; the impeller assembly includes an impeller, and the impeller is rotatably disposed in the installation space; the filter assembly is disposed in the installation space and is arranged circumferentially around the impeller; the limiting assembly is installed in the installation space. When the filter assembly is not installed in the installation space, the limiting assembly is adapted to limit the rotation of the impeller. After the filter assembly is installed in the installation space, the filter assembly is adapted to cooperate with the limiting assembly to release the rotation limit of the impeller by the limiting assembly. According to the dust suction device of the embodiment of the present invention, even if the control switch is touched and the impeller rotates, under the action of the limiting assembly, the impeller cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller after accidentally touching the control switch.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum cleaners, and in particular to a dust suction device and a vacuum cleaner having the same. Background Art

[0002] With the improvement of people's living quality, specific dust removal equipment (such as a desktop vacuum cleaner) is required for cleaning in certain scenarios. In existing desktop vacuum cleaners, when removing the filter net for debris cleaning, if the switch is accidentally touched, the impeller can rotate, posing a risk of harming the user and surrounding items, or causing damage to the vacuum cleaner itself, resulting in poor user experience. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a dust suction device and a vacuum cleaner having the same, the dust suction device having a simple structure and a high safety factor.

[0004] The present invention also provides a vacuum cleaner having the dust suction device.

[0005] According to an embodiment of the present invention, the dust suction device includes: a housing, an impeller assembly, a filter assembly, and a limiting assembly. An installation space is formed inside the housing; the impeller assembly includes an impeller rotatably disposed in the installation space; the filter assembly is disposed in the installation space and is arranged circumferentially around the impeller; the limiting assembly is installed in the installation space. When the filter assembly is not installed in the installation space, the limiting assembly is adapted to limit the rotation of the impeller. When the filter assembly is installed in the installation space, the filter assembly is adapted to cooperate with the limiting assembly to release the rotation restriction of the limiting assembly on the impeller.

[0006] According to the dust suction device of the embodiment of the present invention, by providing a limiting assembly inside the installation space, when the filter assembly is removed, even if the control switch is touched and the impeller rotates, under the action of the limiting assembly, the impeller cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller after accidentally touching the control switch.

[0007] In addition, the dust suction device according to the embodiment of the present invention may further have the following additional technical features:

[0008] In some embodiments of the present invention, a plurality of blades are formed on the impeller, and the limiting assembly includes: a rotational limiting portion rotatably disposed on the inner wall surface of the housing. The rotational limiting portion has a limiting position and an unlocking position in the rotational direction. When the rotational limiting portion is in the limiting position, the rotational limiting portion is adapted to abut against at least one of the blades to limit the rotation of the impeller. When the filtering assembly is installed in the installation space, the filtering assembly is adapted to drive the rotational limiting portion to rotate from the limiting position to the unlocking position to release the rotation limitation of the impeller.

[0009] Optionally, a spiral surface extending along its rotation axis is formed on the rotational limiting portion. When the filtering assembly is installed in the installation space, the filtering assembly is adapted to squeeze the spiral surface to drive the rotational limiting portion to rotate from the limiting position towards the unlocking position.

[0010] Optionally, the filtering assembly includes: a filtering bracket, and a plurality of rib contact portions are formed on the filtering bracket. The plurality of rib contact portions are evenly spaced apart along the circumferential direction of the filtering bracket, and at least one of the plurality of rib contact portions is adapted to cooperate with the rotational limiting portion to drive the rotational limiting portion to rotate from the limiting position towards the unlocking position.

[0011] Furthermore, a plurality of rotational limiting portions are provided, and the plurality of rotational limiting portions correspond to the plurality of rib contact portions one by one.

[0012] Optionally, the limiting assembly further includes: a limiting block adapted to limit the rotation angle of the rotational limiting portion so that the rotational limiting portion remains in the limiting position and the unlocking position.

[0013] Optionally, the rotational limiting portion includes: a rotating portion rotatably disposed on the inner wall of the housing; a squeezing portion formed on one side in the radial direction of the rotating portion, and a spiral surface extending along the rotation axis of the rotating portion is formed on the squeezing portion; and an abutting portion formed on the other side in the radial direction of the rotating portion. When the rotational limiting portion is in the limiting position, the abutting portion is adapted to abut against the blade.

[0014] Furthermore, the limiting assembly further includes: an elastic member disposed between the rotating portion and the housing, and the elastic member is adapted to keep the rotational limiting portion in the limiting position.

[0015] In some embodiments of the present invention, the housing includes:

[0016] An upper housing and a lower housing, an installation space is defined between the upper housing and the lower housing, the upper housing includes a first peripheral wall and a second peripheral wall spaced apart in the radial direction, the lower housing includes a third peripheral wall and a fourth peripheral wall spaced apart in the radial direction, the first peripheral wall and the third peripheral wall, the second peripheral wall and the fourth peripheral wall are in contact in the up-down direction, and the first peripheral wall and the fourth peripheral wall, the second peripheral wall and the third peripheral wall are in fit in the radial direction.

[0017] The present invention also provides a vacuum cleaner having the dust collection device of the above embodiment.

[0018] For the vacuum cleaner according to the embodiment of the present invention, by providing a dust collection device on the vacuum cleaner, when the filter assembly is removed, even if the control switch is touched and the impeller rotates, under the action of the limiting assembly, the impeller cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller after accidentally touching the control switch. After the impeller is limited during rotation, the PTC locked-rotor protection circuit can stop the motor from working.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is an exploded view of the dust collection device according to the embodiment of the present invention;

[0022] Figure 2 is a schematic structural view of the limiting assembly of the dust collection device according to the embodiment of the present invention in the limiting position;

[0023] Figure 3 is a schematic structural view of the limiting assembly of the dust collection device according to the embodiment of the present invention in the unlocked position.

[0024] Reference Signs:

[0025] 100: Dust collection device;

[0026] 1: Housing; 12: Upper housing; 13: Lower housing;

[0027] 2: Impeller assembly; 21: Impeller; 211: Blade;

[0028] 3: Filter assembly; 31: Filter bracket; 311: Rib contact part;

[0029] 4: Limiting component; 41: Rotating limiting part; 411: Spiral curved surface; 412: Rotating part; 413: Extrusion part; 414: Abutting part; 42: Limiting block. Detailed implementation mode

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0031] Reference will be made below Figures 1 - 3 to describe the dust collection device 100 according to an embodiment of the present invention.

[0032] The dust collection device 100 according to an embodiment of the present invention includes: a housing 1, an impeller assembly 2, a filter assembly 3, and a limiting component 4.

[0033] Specifically, an installation space is formed inside the housing 1. The installation space is convenient for accommodating a plurality of components inside the dust collection device 100, protecting the components and fixing their relative positions after assembly. In some examples, the appearance of the housing 1 can be customized according to consumer needs, which is not limited here.

[0034] Furthermore, as Figure 2 shown, the impeller assembly 2 includes an impeller 21. The impeller 21 is rotatably arranged in the installation space. Specifically, when the dust collection device 100 performs a cleaning operation, the impeller 21 rotates, forming a negative pressure inside the dust collection device 100, so that sundries are adsorbed by the dust collection device 100, thereby completing the collection and cleaning of minute sundries.

[0035] It can be understood here that the sundries adsorbed by the dust collection device 100 can be stored in the installation space, or a storage device can be provided so that the adsorbed sundries are stored in the storage device, which is not limited here.

[0036] In some examples, a control switch is provided outside the housing 1. The impeller 21 is driven by a motor to rotate. By controlling the start and stop of the motor through the control switch, the rotation and stop of the impeller 21 can be controlled, which is simple and convenient, and will not be elaborated here too much.

[0037] As Figures 1 - 3 shown, the filter assembly 3 is arranged in the installation space and is circumferentially arranged around the impeller 21. That is to say, when the dust collection device 100 performs a cleaning operation, the sundries can be adsorbed and move towards the installation space by the rotation of the impeller 21 for collection and cleaning. The filter assembly 3 can filter the sundries well to prevent the adsorbed sundries from being discharged along the air circulation path in the direction of air circulation.

[0038] It can be understood that during the process of cleaning sundries, the filter assembly 3 needs to be disassembled. At this time, the impeller 21 is exposed and there is no external protection device. If the control switch is accidentally touched, the impeller 21 rotates, which is likely to cause harm to the user close to the impeller 21, or when the impeller 21 rotates, it will touch the desktop or other objects, causing damage to the objects. If some objects are too hard, it will cause harm to the impeller 21 itself.

[0039] In this application, by providing the limiting component 4 and installing the limiting component 4 in the installation space, when the filter assembly 3 is not installed in the installation space, the limiting component 4 can limit the rotation of the impeller 21. After the filter assembly 3 is installed in the installation space, the filter assembly 3 is adapted to cooperate with the limiting component 4 to release the rotation limitation of the limiting component 4 on the impeller 21. Thus, after the filter assembly 3 is removed, even if the control switch is touched and the impeller 21 rotates, under the action of the limiting component 4, the impeller 21 cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller 21 after accidentally touching the control switch. After the impeller 21 is limited during rotation, the PTC locked-rotor protection circuit can stop the motor from working.

[0040] For the dust suction device 100 according to an embodiment of the present invention, by providing the limiting component 4 inside the installation space, when the filter assembly 3 is removed, even if the control switch is touched and the impeller 21 rotates, under the action of the limiting component 4, the impeller 21 cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller 21 after accidentally touching the control switch.

[0041] In some embodiments of the present invention, a plurality of blades 211 are formed on the impeller 21. As Figure 1 、 Figure 2 shown, the plurality of blades 211 and the connecting portion together form the impeller 21. It can be understood that the rotational speed of the impeller 21 and the number of the blades 211 are proportional to the suction force of the dust suction device 100. By providing a plurality of blades 211, the suction force of the dust suction device 100 can be improved well, and the dust suction ability of the dust suction device 100 can be enhanced.

[0042] The limiting component 4 includes a rotation limiting portion 41. As Figures 1 - 3 shown, the rotation limiting portion 41 is rotatably arranged on the inner wall surface of the housing 1. The rotation limiting portion 41 has a limiting position and an unlocking position in the rotation direction. When the rotation limiting portion 41 is in the limiting position, the rotation limiting portion 41 is adapted to abut against at least one blade 211 to limit the rotation of the impeller 21. When the filter assembly 3 is installed in the installation space, the filter assembly 3 is adapted to drive the rotation limiting portion 41 to rotate from the limiting position to the unlocking position to release the rotation limitation of the impeller 21.

[0043] That is to say, the rotation limiting part 41 can flexibly reciprocate between the limiting position and the unlocking position according to the working state of the dust collection device 100. When the dust collection device 100 needs to perform dust collection work, the filter assembly 3 is installed at a specified position in the installation space. The filter assembly 3 can drive the rotation limiting part 41 to rotate from the limiting position to the unlocking position, and the rotation limiting part 41 releases the rotation restriction on the impeller assembly 2. Then, the control switch is turned on, and the impeller 21 rotates normally to perform dust collection work. When it is necessary to clean the sundries collected by the dust collection device 100, the filter assembly 3 is removed for sundry dumping, cleaning and other processing operations. At this time, the rotation limiting part 41 is disengaged from the filter assembly 3, and the rotation limiting part 41 can return from the unlocking position to the limiting position to limit the rotation of the impeller 21, avoiding accidental contact with the switch during the sundry cleaning process and preventing damage caused by the rotation of the impeller 21.

[0044] Further, as Figures 1 - 3 shown, a spiral surface 411 extending along its rotation axis is formed on the rotation limiting part 41. When the filter assembly 3 is installed in the installation space, the filter assembly 3 is adapted to squeeze the spiral surface 411 to drive the rotation limiting part 41 to rotate from the limiting position to the unlocking position. That is to say, when the filter assembly 3 is installed in the installation space, the filter assembly 3 can cooperate with the spiral surface 411. Under the action of the pressing force applied by the user through the filter assembly 3, the acting force perpendicular to the axis of the rotation limiting part 41 decomposed from the force acting on the spiral surface 411 will drive the rotation limiting part 41 to rotate around its axis, which is simple, convenient and effective.

[0045] In some examples, during the process of the filter assembly 3 squeezing the spiral surface 411, the rotation limiting part 41 can move towards the unlocking position. When the rotation limiting part 41 moves to the unlocking position, the rotation limiting part 41 will not affect the rotation of the impeller assembly 2, ensuring the normal operation of the dust collection device 100.

[0046] As Figure 1 、 Figure 3As shown, the filtering component 3 includes: a filtering bracket 31, on which a plurality of rib contact portions 311 are formed. The plurality of rib contact portions 311 are uniformly spaced along the circumference of the filtering bracket 31. At least one of the plurality of rib contact portions 311 is adapted to cooperate with the rotation limiting portion 41 to drive the rotation limiting portion 41 to rotate from the limiting position towards the unlocking position. That is, when assembling the vacuum cleaner 100, the filtering component 3 applies pressure to the spiral surface 411 of the rotation limiting portion 41 through the rib contact portions 311. In some examples, the plurality of rib contact portions 311 can be formed as protruding cylinders on the inner side wall of the filtering bracket 31. When installing the filtering component 3, one end of the rib contact portion 311 close to the rotation limiting portion 41 contacts and presses the spiral surface 411 to drive the rotation limiting portion 41 to rotate around its axis, so that the rotation limiting portion 41 rotates from the limiting position to the unlocking position.

[0047] It can be understood that the setting position and shape of the rib contact portions 311 can be set according to the requirements of the embodiments, and there is no limitation here. The above is only an example for easy understanding of the cooperation relationship between the rib contact portions 311 and the rotation limiting portion 41 of the present invention.

[0048] Furthermore, a plurality of rotation limiting portions 41 are provided. The plurality of rotation limiting portions 41 correspond to the plurality of rib contact portions 311 one by one. The plurality of rotation limiting portions 41 enhance the rotation limiting ability of the limiting component 4 on the impeller component 2. At the same time, when one of the rotation limiting portions 41 loses its limiting function, the other rotation limiting portions 41 can still work normally, enhancing the reliability of the vacuum cleaner 100.

[0049] In some examples, a positioning portion cooperating with the filtering component 3 is formed in the installation space. Through the positioning portion, the filtering component 3 can be quickly positioned when assembled into the installation space. After positioning, the filtering component 3 can stably drive the rotation limiting portion 41 to move, thereby improving the assembly efficiency of the vacuum cleaner 100.

[0050] In some embodiments of the present invention, as Figures 1 - 3 shown, the limiting component 4 further includes: a limiting block 42. The limiting block 42 is adapted to limit the rotation angle of the rotation limiting portion 41 so that the rotation limiting portion 41 remains in the limiting position and the unlocking position.

[0051] In such Figure 2 and Figure 3 shown in a specific example, the impeller component 2 can rotate in the clockwise direction. When the filtering component 3 is not installed in the vacuum cleaner 100, as Figure 2As shown, the rotation limiting part 41 is in the limiting position, the position of the limiting block 42 is relatively fixed, and the limiting block 42 directly acts on the impeller assembly 2 through the rotation limiting part 41, thereby restricting the rotation of the impeller assembly 2. After the filter assembly 3 is normally installed in the dust suction device 100, as Figure 3 shown, driven by the filter assembly 3, the rotation limiting part 41 rotates from the limiting position to the unlocking position. There is no contact part between the rotation limiting part 41 and the impeller assembly 2, and the impeller assembly 2 can rotate normally. At this time, under the combined action of the limiting block 42 and the rib contact part 311, the rotation limiting part 41 will not rotate, ensuring the normal operation of the dust suction device 100 with a simple structure.

[0052] It should be noted that the above description is only a specific description of one embodiment of the limiting component 4 for easy understanding of the working principle of the limiting component 4, and it is not a limitation to the present invention.

[0053] In some embodiments of the present invention, the rotation limiting part 41 includes a rotating part 412, a pressing part 413, and an abutting part 414. The rotating part 412 is rotatably arranged on the inner wall of the housing 1. The pressing part 413 is formed on one side in the radial direction of the rotating part 412. A spiral surface 411 extending along the rotation axis of the rotating part 412 is formed on the pressing part 413. The abutting part 414 is formed on the other side in the radial direction of the rotating part 412. When the rotation limiting part 41 is in the limiting position, the abutting part 414 is adapted to abut against the blade 211.

[0054] In some examples, as Figure 2 shown, when the filter assembly 3 is not installed in the dust suction device 100, the rotation limiting part 41 is in the limiting position. At this time, the pressing part 413 abuts against the limiting block 42, and the abutting part 414 abuts against the blade 211. The force of the limiting block 42 on the pressing part 413 causes the abutting part 414 to limit the blade 211, thereby preventing the rotation of the impeller assembly 2. As Figure 3 shown, after the filter assembly 3 is installed in the dust suction device 100, the rotating part 412 drives the pressing part 413 and the abutting part 414 to rotate clockwise. At this time, the spiral surface 411 of the pressing part 413 abuts against the rib contact part 311, and the abutting part 414 abuts against the limiting block 42, thereby preventing the rotation of the rotation limiting part 41. At this time, the impeller assembly 2 can rotate normally, and the dust suction device 100 can operate normally.

[0055] Further, the limiting component 4 further includes: an elastic member disposed between the rotating portion 412 and the housing 1. The elastic member is adapted to keep the rotating limiting portion 41 in the limiting position. That is, when the filtering component 3 is not installed in the dust suction device 100, the rotating limiting portion 41 is kept in the limiting position under the action of the elastic member and the limiting block 42 to ensure the rotation limitation of the impeller assembly 2 by the rotating limiting portion 41. During the installation of the filtering component 3, pressure is applied to the spiral surface 411 through the rib contact portion 311. After the installation is completed, the rib contact portion 311 abuts against the pressing portion 413 to prevent it from rotating towards the limiting block 42, so that the rotating limiting portion 41 is kept in the unlocking position, ensuring the normal operation of the dust suction device 100.

[0056] In some embodiments of the present invention, the housing 1 includes: an upper housing 12 and a lower housing 13. An installation space is defined between the upper housing 12 and the lower housing 13. The upper housing 12 includes a first peripheral wall and a second peripheral wall spaced apart in the radial direction. The lower housing 13 includes a third peripheral wall and a fourth peripheral wall spaced apart in the radial direction. The first peripheral wall and the third peripheral wall, and the second peripheral wall and the fourth peripheral wall are in contact in the up-down direction. The first peripheral wall and the fourth peripheral wall, and the second peripheral wall and the third peripheral wall are in fit in the radial direction. Thus, after the upper housing 12 and the lower housing 13 are fitted together, fasteners such as screws can directly pass through the first peripheral wall and the fourth peripheral wall and / or the second peripheral wall and the third peripheral wall, with a simple structure and convenient assembly.

[0057] Further, as Figure 1 shown, the first peripheral wall, the second peripheral wall, the third peripheral wall and the fourth peripheral wall can be formed into a serrated shape, and there is a height difference between the serrations of the first peripheral wall and the second peripheral wall, and the third peripheral wall and the fourth peripheral wall, so that the first peripheral wall and the third peripheral wall, and the second peripheral wall and the fourth peripheral wall can be better in contact in the up-down direction, and the first peripheral wall and the fourth peripheral wall, and the second peripheral wall and the third peripheral wall can be better in fit in the radial direction, and it also makes the structure more beautiful.

[0058] The present invention also proposes a vacuum cleaner having the dust suction device 100 of the above embodiments.

[0059] According to the vacuum cleaner of the embodiments of the present invention, by providing the dust suction device 100 on the vacuum cleaner, even if the control switch is touched when the filtering component 3 is removed, causing the impeller 21 to rotate, under the action of the limiting component 4, the impeller 21 cannot continue to rotate, thus preventing potential safety hazards caused by the rotation of the impeller 21 after accidentally touching the control switch. After the impeller 21 is limited during rotation, the PTC locked-rotor protection circuit can stop the motor from working.

[0060] Next, according to Figures 1 - 3Describe in detail the specific structure and specific working process of the dust suction device 100 according to a specific embodiment of the present invention.

[0061] The dust suction device 100 includes: a housing 1, an impeller assembly 2, a filter assembly 3, and a limiting assembly 4.

[0062] Reference Figure 1 , the housing 1 includes an upper housing 12 and a lower housing 13. An installation space is defined between the upper housing 12 and the lower housing 13. The upper housing 12 includes a first peripheral wall and a second peripheral wall that are spaced apart in the radial direction. The lower housing 13 includes a third peripheral wall and a fourth peripheral wall that are spaced apart in the radial direction. The first peripheral wall and the third peripheral wall, and the second peripheral wall and the fourth peripheral wall are in contact in the up and down direction. The first peripheral wall and the fourth peripheral wall, and the second peripheral wall and the third peripheral wall are in fit in the radial direction. A plurality of dust suction channels are formed on the lower housing 13.

[0063] Reference Figure 1 , Figure 2 , the impeller assembly 2 includes an impeller 21. A plurality of blades 211 are formed on the impeller 21. The impeller assembly 2 is rotatably installed in the upper housing 12 and is controlled to rotate by a motor. A switch of the dust suction device 100 is provided outside the upper housing 12.

[0064] Reference Figure 1 , Figure 3 , the filter assembly 3 is installed between the impeller assembly 2 and the lower housing 13. The filter assembly 3 is arranged circumferentially around the impeller 21. A round hole is provided in the middle of the filter assembly 3. The filter assembly 3 includes a filter bracket 31, and a rib contact portion 311 is formed on the filter bracket 31.

[0065] Reference Figures 1 - 3 , the limiting assembly 4 includes a rotation limiting portion 41, a limiting block 42, and an elastic member. The rotation limiting portion 41 is fixed inside the upper housing 12 by screws. The rotation limiting portion 41 includes: a rotating portion 412, a pressing portion 413, and an abutting portion 414. The rotating portion 412 is rotatably arranged on the inner wall of the housing 1. The pressing portion 413 is formed on one side in the radial direction of the rotating portion 412. A spiral surface 411 extending along the rotation axis of the rotating portion 412 is formed on the pressing portion 413. The abutting portion 414 is formed on the other side in the radial direction of the rotating portion 412. When the rotation limiting portion 41 is in the limiting position, the abutting portion 414 is adapted to abut against the blade 211. The limiting block 42 is arranged on the left side of the rotation limiting portion 41. The elastic member is arranged between the rotating portion 412 and the housing 1.

[0066] Next, reference Figures 1 - 3 Describe in detail the specific working process of the dust suction device 100 according to an embodiment of the present invention.

[0067] When the vacuum cleaner needs to perform a cleaning operation, the filter assembly 3 is installed on the upper housing 12. One end of the rib contact portion 311 close to the rotation limiting portion 41 contacts and presses the spiral surface 411 to drive the rotation limiting portion 41 to rotate around its axis, so that the rotation limiting portion 41 rotates from the limiting position to the unlocking position. The fastening device can fixedly connect the upper housing 12 and the lower housing 13. At this time, the impeller 21 can rotate normally and the vacuuming device 100 can operate normally. When it is necessary to clean the debris inside the vacuuming device 100, the lower housing 13 is opened, the filter assembly 3 is taken out, and the rotation limiting portion 41 moves from the unlocking position towards the limiting position under the action of the elastic member. Even if it touches the control switch and causes the impeller 21 to rotate, under the action of the limiting assembly 4, the impeller 21 cannot continue to rotate, thereby preventing potential safety hazards caused by the rotation of the impeller 21 after accidentally touching the control switch. After the impeller 21 is limited during rotation, the PTC stall protection circuit can stop the motor from working. After the debris is cleaned, the filter assembly 3 is reinstalled into the vacuuming device 100, and the rotation limiting portion 41 returns to the unlocking position, and the vacuuming device 100 can operate normally.

[0068] Other configurations and operations of the vacuuming device 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0069] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "optionally", "further", or "some examples" etc. mean 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 invention. In this specification, the schematic representations 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.

[0070] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dust suction device, characterized in that, it comprises: a housing, the housing comprising: an upper housing and a lower housing, an installation space being defined between the upper housing and the lower housing; an impeller assembly, the impeller assembly comprising an impeller, the impeller being rotatably arranged in the installation space; a filter assembly, the filter assembly being arranged in the installation space and disposed circumferentially around the impeller; a limiting assembly, the limiting assembly being installed in the installation space, when the filter assembly is not installed in the installation space, the limiting assembly is adapted to limit the rotation of the impeller, and when the filter assembly is installed in the installation space, the filter assembly is adapted to cooperate with the limiting assembly to release the rotation limitation of the impeller by the limiting assembly; a plurality of blades are formed on the impeller, and the limiting assembly comprises: a rotation limiting portion, the rotation limiting portion being rotatably arranged on the inner wall surface of the housing, the rotation limiting portion having a limiting position and an unlocking position in the rotation direction, when the rotation limiting portion is in the limiting position, the rotation limiting portion is adapted to abut against at least one of the blades to limit the rotation of the impeller, and when the filter assembly is installed in the installation space, the filter assembly is adapted to drive the rotation limiting portion to rotate from the limiting position to the unlocking position to release the rotation limitation of the impeller.

2. The dust suction device according to claim 1, characterized in that, a spiral surface extending along its rotation axis is formed on the rotation limiting portion, and when the filter assembly is installed in the installation space, the filter assembly is adapted to squeeze the spiral surface to drive the rotation limiting portion to rotate from the limiting position towards the unlocking position.

3. The dust suction device according to claim 1, characterized in that, the filter assembly comprises: a filter bracket, a plurality of rib contact portions are formed on the filter bracket, the plurality of rib contact portions are evenly spaced apart circumferentially along the filter bracket, and at least one of the plurality of rib contact portions is adapted to cooperate with the rotation limiting portion to drive the rotation limiting portion to rotate from the limiting position towards the unlocking position.

4. The dust suction device according to claim 3, characterized in that, a plurality of rotation limiting portions are provided, and the plurality of rotation limiting portions correspond to the plurality of rib contact portions one by one.

5. The dust suction device according to claim 1, characterized in that, the limiting assembly further comprises: a limiting block, the limiting block being adapted to limit the rotation angle of the rotation limiting portion so that the rotation limiting portion remains in the limiting position and the unlocking position.

6. The dust suction device according to claim 1, characterized in that, the rotation limiting portion comprises: a rotating portion, the rotating portion being rotatably arranged on the inner wall of the housing; a squeezing portion, the squeezing portion being formed on one side in the radial direction of the rotating portion, and a spiral surface extending along the rotation axis of the rotating portion is formed on the squeezing portion; an abutting portion, the abutting portion being formed on the other side in the radial direction of the rotating portion, and when the rotation limiting portion is in the limiting position, the abutting portion is adapted to abut against the blade.

7. The dust suction device according to claim 6, wherein, the limiting assembly further includes: an elastic member disposed between the rotating portion and the housing, and the elastic member is adapted to keep the rotation limiting portion in the limiting position.

8. The dust suction device according to claim 1, wherein, the upper housing includes a first peripheral wall and a second peripheral wall spaced apart in the radial direction, the lower housing includes a third peripheral wall and a fourth peripheral wall spaced apart in the radial direction, the first peripheral wall abuts against the third peripheral wall, and the second peripheral wall abuts against the fourth peripheral wall in the up-down direction, and the first peripheral wall fits with the fourth peripheral wall, and the second peripheral wall fits with the third peripheral wall in the radial direction.

9. A vacuum cleaner, wherein, it includes: the dust suction device according to any one of claims 1-8.

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