Dust collector motor and dust collector

Abstract

The application relates to a dust collector motor and a dust collector. The dust collector motor comprises a movable impeller and a fixed impeller assembly coaxially arranged, and the movable impeller is located upstream of the fixed impeller assembly along the airflow flow direction; the fixed impeller assembly comprises a plurality of fixed impellers coaxially arranged, and each fixed impeller comprises a wheel body and a plurality of blades arranged on the outer surface of the wheel body in the circumferential direction. The blades in each fixed impeller are arranged one by one in correspondence, and in any two adjacent fixed impellers, the leading edges and trailing edges of the corresponding blades are connected, so that the corresponding blades in the plurality of fixed impellers form a continuous combined blade, and a fluid channel for flow guiding is formed between any two adjacent combined blades; wherein a spoiler structure is arranged on the profile of at least one combined blade, so that the pressure distribution of the fluid channel at different positions in the airflow flow direction is layered. The dust collector motor and the dust collector in the application have low noise.

Description

Technical Field

[0001] This invention relates to the field of vacuum cleaner technology, and in particular to vacuum cleaner motors and vacuum cleaners. Background Technology

[0002] As living standards improve, vacuum cleaners are becoming increasingly common, and the vacuum cleaner motor is the heart of the machine. The fan part of a vacuum cleaner motor can include a fixed impeller and a moving impeller arranged coaxially. The main function of the fixed impeller is to more effectively release the airflow generated by the moving impeller.

[0003] The impeller in related technologies generally includes an outer ring, an inner ring located inside the outer ring, and several blades connecting the outer and inner rings. The blades are arranged spirally outside the inner ring to form airflow channels between adjacent blades. However, vortices are easily generated in the airflow channels of related technologies. These vortices accumulate in the impeller, easily causing vibration noise and vortex noise in the fan, resulting in relatively high noise levels from the vacuum cleaner motor in these technologies. Summary of the Invention

[0004] Therefore, it is necessary to provide a vacuum cleaner motor and vacuum cleaner with lower noise to address the problem of excessive noise in existing vacuum cleaner motors.

[0005] The first aspect of this application provides a vacuum cleaner motor, including a moving impeller and a fixed impeller assembly arranged coaxially, wherein the moving impeller is located upstream of the fixed impeller assembly along the airflow direction;

[0006] The impeller assembly includes multiple impellers arranged coaxially. Each impeller includes a wheel body and multiple blades arranged on the outer surface of the wheel body in the circumferential direction. Each blade includes a root fixed to the wheel body, a top spaced apart from the wheel body, a leading edge extending between the root and the top, and a trailing edge extending between the root and the top.

[0007] The blades in each fixed impeller are arranged in a one-to-one correspondence. In any two adjacent fixed impellers, the leading and trailing edges of the corresponding blades are connected so that the corresponding blades in multiple fixed impellers form a continuous combination blade. A fluid channel for guiding flow is formed between any two adjacent combination blades.

[0008] In this design, at least one of the combined blades has a turbulence structure on its profile to create stratification of the pressure distribution at different locations in the airflow direction of the fluid channel.

[0009] In one embodiment, the turbulence structure is configured as a recessed or protruding structure formed on the profile of the combined blades.

[0010] and / or

[0011] The turbulence structure is located at the junction of two adjacent blades that make up the same combined blade.

[0012] In one embodiment, multiple fixed impellers are staggered along the axial direction of the fixed impeller assembly to form a stepped structure on the inner wall of the fluid channel, the stepped structure forming a turbulence structure.

[0013] In one embodiment, in the circumferential direction of the wheel body, the leading edge of each blade is located in front of the trailing edge;

[0014] The projections of two adjacent blades of each impeller in a plane perpendicular to the axis of the impeller assembly do not overlap.

[0015] In one embodiment, in any two adjacent fixed impellers, one fixed impeller is provided with a locking part, and the other fixed impeller is provided with a locking engagement part that engages with the locking part, so as to restrict the movement of the two adjacent fixed impellers relative to each other along the axial direction of the fixed impeller assembly.

[0016] In one embodiment, the wheel body is configured as a ring-shaped element;

[0017] Each impeller also includes an annular cover coaxially sleeved on the outer side of the impeller body, with the top of the blades connected to the annular cover;

[0018] The impeller bodies of each fixed impeller are interconnected to form an inner guide ring, and the annular covers of each fixed impeller are interconnected to form an outer guide ring.

[0019] The combined blades are located between the inner and outer guide rings, and any two adjacent combined blades, together with the inner and outer guide rings, define the fluid channel.

[0020] In one embodiment, the annular cover, the impeller body, and the blades connecting the annular cover and the impeller body are integrally formed, and the material is PA66+30%GF.

[0021] In one embodiment, the thickness of each blade is 1 mm to 5 mm.

[0022] In one embodiment, in any two adjacent fixed impellers, the engaging part is provided on the radial inner side of the wheel body of one of the fixed impellers, and the engaging mating part is provided on the other fixed impeller and extends to the radial inner side of the wheel body of one of the fixed impellers to engage with the engaging part.

[0023] In one embodiment, the engaging portion is configured as a hook, and the engaging mating portion is provided with a engaging groove for the engaging portion to engage.

[0024] In one embodiment, the number of fixed impellers is two;

[0025] The fixed impeller located upstream along the airflow direction is defined as the first fixed impeller, and the fixed impeller located downstream along the airflow direction is defined as the second fixed impeller.

[0026] The first fixed impeller has a first mating part and a second mating part that extend toward the second fixed impeller and are in an annular shape, respectively. The second fixed impeller has a third mating part and a fourth mating part that extend toward the first fixed impeller and are in an annular shape, respectively.

[0027] Among them, the first and third mating parts are in contact with each other; the second and fourth mating parts are in contact with each other.

[0028] In one embodiment, the inner side of the first mating part along the radial direction of the fixed impeller assembly is in contact with the outer side of the third mating part along the radial direction of the fixed impeller assembly.

[0029] The outer surface of the second mating part along the radial direction of the fixed impeller assembly is in contact with the inner surface of the fourth mating part along the radial direction of the fixed impeller assembly.

[0030] In one embodiment, the inner surface of the first mating part along the radial direction of the fixed impeller assembly and the outer surface of the third mating part along the radial direction of the fixed impeller assembly are configured as matching conical surfaces.

[0031] The outer surface of the second mating part along the radial direction of the fixed impeller assembly and the inner surface of the fourth mating part along the radial direction of the fixed impeller assembly are constructed as matching conical surfaces.

[0032] The distance between the inner surface of the first mating part along the radial direction of the fixed impeller assembly and the outer surface of the second mating part along the radial direction of the fixed impeller assembly is defined as d;

[0033] Along the direction of airflow, the spacing d gradually increases.

[0034] In one embodiment, the annular cover of the first fixed impeller is provided with a first bearing portion, which is used to abut against the third mating portion when the first mating portion and the third mating portion are engaged;

[0035] The first impeller has a second bearing portion on its body, which is used to abut against the fourth mating portion when the second mating portion and the fourth mating portion are engaged; and / or

[0036] The second impeller has a third bearing part on its annular cover. The third bearing part is used to abut against the first mating part when the first mating part and the third mating part are mated.

[0037] The second impeller has a fourth bearing part, which is used to abut against the second mating part when the second mating part and the fourth mating part are mated.

[0038] In one embodiment, one of the first and second fixed impellers is provided with a positioning post, and the other is provided with a positioning groove that matches the positioning post.

[0039] When the first mating part and the third mating part come into contact with each other, and when the second mating part and the fourth mating part come into contact with each other, the positioning pin is inserted into the positioning groove.

[0040] In one embodiment, the annular cover of the first fixed impeller has a locking protrusion structure on its radially outer side.

[0041] In one embodiment, a base is provided at the upstream end face of the first impeller body;

[0042] The impeller assembly also includes a baffle disposed on the base, the baffle being constructed in an annular shape and positioned radially inside the inner flow guide ring.

[0043] In one embodiment, each combined blade is configured as an airfoil, with the leading edge of the combined blade positioned upstream of the trailing edge of the combined blade along the airflow direction.

[0044] In one embodiment, all blades in the fixed impeller assembly have the same thickness.

[0045] In one embodiment, in the projection of the fixed impeller assembly onto a first plane, the projections of two adjacent combined blades have an overlapping area, wherein the first plane is perpendicular to the axial direction of the fixed impeller assembly.

[0046] In one embodiment, the vacuum cleaner motor further includes an impeller shroud connected to the fixed impeller assembly and covering the side of the moving impeller opposite to the fixed impeller assembly; and / or

[0047] The vacuum cleaner motor also includes a motor body, which is located on the side of the fixed impeller assembly away from the moving impeller. The output shaft of the motor body passes through the fixed impeller assembly and is connected to the moving impeller in a driving connection.

[0048] A second aspect of this application provides a vacuum cleaner, including the vacuum cleaner motor described above.

[0049] The beneficial effects of the aforementioned vacuum cleaner motor and vacuum cleaner are as follows:

[0050] By including multiple coaxially arranged fixed impellers in the fixed impeller assembly, the corresponding blades of the multiple fixed impellers form a continuous combined blade, and at least one combined blade has a turbulence structure on its profile, so that the pressure distribution of the fluid channel at different positions in the airflow direction is stratified. This can decompose the eddies in the fluid channel, dissipate energy quickly, reduce the turbulence noise formed by the eddies in the fluid channel, reduce the vibration of the vacuum cleaner motor, and play a noise reduction role. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a vacuum cleaner motor provided in an embodiment of this application;

[0052] Figure 2 A schematic diagram of the structure of the impeller cover and the fixed impeller assembly in the vacuum cleaner motor provided in the embodiment of this application;

[0053] Figure 3 An exploded view of the vacuum cleaner motor provided in an embodiment of this application;

[0054] Figure 4 This is a schematic diagram of the structure of the fixed impeller assembly provided in the embodiments of this application;

[0055] Figure 5 A schematic diagram of another structure of the fixed impeller assembly provided in an embodiment of this application;

[0056] Figure 6 This is a schematic diagram of the structure of the fixed impeller assembly provided in the embodiments of this application;

[0057] Figure 7a This is a schematic diagram of the structure of the fixed impeller assembly after partial cutting of its outer contour, as provided in an embodiment of this application.

[0058] Figure 7b for Figure 7a A magnified view of a portion at point A;

[0059] Figure 8 Another structural schematic diagram of the outer contour of the fixed impeller assembly provided in the embodiment of this application after partial cutting;

[0060] Figure 9 A simulation diagram of pressure distribution in a vacuum cleaner motor of existing technology;

[0061] Figure 10 This is a simulation diagram of the pressure distribution in a vacuum cleaner motor provided in an embodiment of this application;

[0062] Figure 11 A schematic diagram illustrating the construction process of the fixed impeller assembly provided in the embodiments of this application;

[0063] Figure 12 A cross-sectional view of the fixed impeller assembly provided in an embodiment of this application;

[0064] Figure 13 for Figure 12 A magnified view of a portion at point B;

[0065] Figure 14 This is a schematic diagram of the structure of the first fixed impeller in the fixed impeller assembly provided in the embodiments of this application;

[0066] Figure 15This is a schematic diagram of the structure of the second fixed impeller in the fixed impeller assembly provided in the embodiments of this application;

[0067] Figure 16 A cross-sectional view of the combined blades in the fixed impeller assembly provided in this application embodiment;

[0068] Figure 17 This is a schematic diagram of the structure of a vacuum cleaner provided in an embodiment of this application.

[0069] Explanation of icon numbers:

[0070] 100. Stator impeller assembly; 110. Combined blades; 1101. Leading edge of combined blades; 1102. Trailing edge of combined blades; 120. Fluid passage; 130. Overlapping area; 140. Spacing; 150. Inner guide ring; 160. Outer guide ring;

[0071] 10. Stator impeller; 11. Impeller body; 12. Blade; 13. Engaging part; 14. Engaging mating part; 141. Engaging groove; 16. Annular cover; 121. Leading edge; 122. Trailing edge; 123. Root; 124. Top;

[0072] 20. First fixed impeller; 21. Impeller body of the first fixed impeller; 211. Second mating part; 2111. Second bearing part; 212. Fourth mating part; 22. Annular cover of the first fixed impeller; 221. First mating part; 2211. First bearing part; 222. Third mating part; 23. Positioning post; 24. Positioning groove;

[0073] 30. Second fixed impeller; 31. Impeller body of the second fixed impeller; 311. Fourth bearing part; 32. Annular cover of the second fixed impeller; 321. Third bearing part;

[0074] 40. Snap-fit ​​structure; 41. Snap-fit ​​structure; 42. Base; 50. Baffle; 60. Turbulence structure;

[0075] 200. Vacuum cleaner motor; 210. Moving impeller; 220. Impeller cover; 230. Motor body;

[0076] 300. Vacuum cleaner; 310. Floor brush; 320. Dust cup; 330. Body. Detailed Implementation

[0077] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0082] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0083] The following description, in conjunction with the accompanying drawings, illustrates the impeller assembly, vacuum cleaner motor, and vacuum cleaner according to embodiments of this application.

[0084] Figure 1 This is a schematic diagram of the structure of a vacuum cleaner motor provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the impeller cover and the fixed impeller assembly in the vacuum cleaner motor provided in the embodiments of this application. Figure 3 This is an exploded view of the vacuum cleaner motor provided in an embodiment of this application.

[0085] Reference Figure 1 , Figure 2 , Figure 3 This application provides a vacuum cleaner motor 200, including a moving impeller 210 and a fixed impeller assembly 100. The moving impeller 210 and the fixed impeller assembly 100 are coaxially arranged and aligned along the airflow direction (e.g., ...). Figure 2 (As shown by the dashed arrow in the middle), the moving impeller 210 is located on the upstream side S of the fixed impeller assembly 100.

[0086] Furthermore, the vacuum cleaner motor 200 also includes an impeller cover 220, which is connected to the fixed impeller assembly 100 and covers the side of the moving impeller 210 opposite to the fixed impeller assembly 100.

[0087] In some examples, the vacuum cleaner motor 200 also includes a motor body 230 located on the side of the fixed impeller assembly 100 opposite to the moving impeller 210, with its output shaft passing through the fixed impeller assembly 100 and being drively connected to the moving impeller 210.

[0088] The following describes the working process of the vacuum cleaner motor 200, such as... Figure 2 , Figure 3 As shown, the dashed arrows indicate the gas flow path. When the motor body 230 drives the moving impeller 210 to rotate, the airflow flows from the external environment into the impeller cover 220, passes through the blades of the moving impeller 210, and then flows into the blades of the fixed impeller assembly 100. In other words, the moving impeller 210 and the fixed impeller assembly 100 guide the airflow toward the motor body 230 and then out of the vacuum cleaner motor.

[0089] In this embodiment of the application, for ease of explanation, the side of the fixed impeller assembly 100 facing the moving impeller 210 is defined as the upstream side S of the fixed impeller assembly 100, and the side of the fixed impeller assembly 100 away from the moving impeller 210 is defined as the downstream side X of the fixed impeller assembly 100. A plane perpendicular to the axial direction O of the fixed impeller assembly 100 is defined as the first plane N.

[0090] Figure 4 This is a schematic diagram of the structure of the impeller assembly provided in an embodiment of this application.

[0091] The impeller assembly 100 of this embodiment includes a plurality of fixed impellers 10 arranged coaxially, and the plurality of fixed impellers 10 can be stacked together.

[0092] It should be noted that, Figure 4 The following explanation uses the impeller assembly 100, which includes two impellers 10, as an example. Of course, the number of impellers 10 in the impeller assembly 100 can be set according to actual needs. It is understood that the number of impellers 10 is similar to other cases, and will not be elaborated here.

[0093] Each impeller 10 includes a body 11 and a plurality of blades 12 disposed along the outer surface of the body 11 in a circumferential direction. Each blade 12 includes a root 123 fixed to the body 11, a top 124 spaced apart from the body 11, a leading edge 121 extending between the root 123 and the top 124, and a trailing edge 122 extending between the root 123 and the top 124. It should be noted that the leading edge 121 here actually refers to the end of the blade 12 near the upstream side S, and the trailing edge 122 refers to the end of the blade 12 near the downstream side.

[0094] In this configuration, the blades 12 in each fixed impeller 10 are arranged in a one-to-one correspondence. In any two adjacent fixed impellers 10, the leading edges 121 and trailing edges 122 of the two corresponding blades 12 are connected, so that all the corresponding blades 12 in the multiple fixed impellers 10 constitute a continuous combined blade. A fluid channel for guiding flow is formed between any two adjacent combined blades 110.

[0095] In addition, all blades 12 included in the fixed impeller assembly 100 can have the same thickness to facilitate demolding.

[0096] Figure 5 This is a schematic diagram of another structure of the fixed impeller assembly provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of the fixed impeller assembly provided in the embodiments of this application. Figure 7a This is a partial cutaway structural diagram of the outer contour of the fixed impeller assembly provided in an embodiment of this application. Figure 7b for Figure 7a A magnified view of a portion at point A. Figure 8This is another structural schematic diagram of the outer contour of the fixed impeller assembly provided in the embodiment of this application after partial cutting.

[0097] Reference Figure 5 , Figure 6 In the projection of the fixed impeller assembly 100 onto the first plane N, the projections of two adjacent combined blades 110 have an overlapping region 130 (e.g., Figure 6 (As shown in the shaded area). Here, in the fixed impeller assembly 100, the projections of any two adjacent combined blades 110 on the first plane N have an overlapping area 130, which makes the combined blades 110 longer.

[0098] In the above solution, by making the impeller assembly 100 include a plurality of coaxially arranged impellers 10, and the corresponding blades 12 of the plurality of impellers 10 constitute a continuous combined blade 110, and the projections of two adjacent combined blades on the first plane N have an overlapping area 130, compared with the case in the prior art where the projections of two adjacent combined blades are spaced apart, the length of the fluid channel formed between adjacent combined blades 110 in this application is longer. This can make the airflow velocity at the downstream outlet of the impeller assembly 100 along the airflow flow lower, the dynamic pressure and static pressure conversion is sufficient, and the efficiency of the vacuum cleaner motor is improved.

[0099] In the embodiments of this application, reference is made to Figure 6 , Figure 7a , Figure 7b In the circumferential direction of the wheel body 11, the leading edge 121 of each blade 12 is located in front of the trailing edge 122, and the projections of two adjacent blades 12 of each fixed impeller 10 in the first plane N do not overlap. In other words, in the projections of the blades 12 included in each fixed impeller 10 on the first plane N, there is a gap between the projections of two adjacent blades 12, or in the projections of the adjacent leading edges 121 and trailing edges 122 of two adjacent blades 12 of each fixed impeller 10 on the first plane N, they are connected. This reduces the molding difficulty of a single-layer fixed impeller 10, while stacking multiple fixed impellers 10, with each fixed impeller 10 participating in the formation process of the fluid channel 120, resulting in a longer fluid channel 120 and improving the efficiency of the vacuum cleaner motor 200.

[0100] In this embodiment, reference is continued. Figure 7a , Figure 7b , Figure 8 The impeller body 11 is constructed as an annular member; each impeller 10 also includes an annular cover 16 coaxially sleeved on the outer side of the impeller body 11, and the top 124 of the blade 12 is connected to the annular cover 16. In other words, the annular cover 16 surrounds the outer side of the impeller body 11 and is spaced from the outer side of the impeller body 11, and the blade 12 can be located in the space.

[0101] The wheel bodies 11 of each fixed impeller 10 are interconnected to form an inner guide ring 150, and the annular covers 16 of each fixed impeller 10 are interconnected to form an outer guide ring 160.

[0102] The combined blades 110 are located between the inner guide ring 150 and the outer guide ring 160. Any two adjacent combined blades 110, together with the inner guide ring 150 and the outer guide ring 160, define a fluid channel 120. The airflow from the automatic impeller enters the fluid channel 120. As mentioned above, compared to existing blades, the combined blades 110 are longer in the gas flow direction, thus increasing the length of the fluid channel 120 defined by any two adjacent combined blades 110, the inner guide ring 150, and the outer guide ring 160. This allows for a lower airflow velocity at the downstream outlet of the fixed impeller assembly 100 along the airflow path, ensuring sufficient conversion between dynamic and static pressure and improving the efficiency of the vacuum cleaner motor.

[0103] In the embodiments of this application, reference is made to Figure 7b , Figure 8 At least one of the combined blades 110 has a turbulence structure 60 on its profile to make the pressure distribution of the fluid channel 120 at different positions in the airflow direction stratify. This can decompose the eddies in the fluid channel 120, dissipate energy quickly, reduce the turbulence noise formed by the eddies in the fluid channel 120, reduce the vibration of the vacuum cleaner motor, and play a noise reduction role.

[0104] The turbulence structure 60 can be located at the junction of two adjacent blades 12 that constitute the same combined blade 110.

[0105] In some embodiments, the turbulence structure 60 is configured as a recessed or protruding structure (not shown) formed on the profile of the combined blade 110.

[0106] Reference Figure 7b , Figure 8 As one possible implementation, multiple fixed impellers 10 are staggered in the axial direction of the fixed impeller assembly 100 to form a stepped structure on the inner wall of the fluid channel 120, and the stepped structure forms a turbulence structure 60.

[0107] This staggered arrangement causes the pressure distribution in the fluid channel 120 to be stratified from the upstream side S to the downstream side X. Due to the drop in the fluid channel 120, the pressure can be quickly released at the outlet of the fluid channel 120, which can reduce pressure pulsation. At the same time, this staggered structure also affects the vortex at the inlet of the fluid channel 120, increasing the vortex disturbance at the inlet. It can effectively break up the vortex micro-clusters formed by the airflow, accelerate the energy transfer, reduce the energy accumulation, and thus reduce the turbulence noise formed by the vortex.

[0108] Figure 9 This is a simulation diagram of pressure distribution in a vacuum cleaner motor using existing technology. Figure 10 A simulation diagram of pressure distribution in a vacuum cleaner motor provided in an embodiment of this application.

[0109] The fluid channel of existing vacuum cleaner motors does not have a turbulence-inducing structure. (Refer to...) Figure 9 airflow from Figure 9 When the high-pressure zone on the left side of the diagram enters, the gas is in a turbulent state, generating large eddies in the guide channel. These eddies accumulate in the impeller, and the energy cannot be dissipated quickly, causing instability in the vacuum cleaner motor and pressure fluctuations, which in turn cause vibration noise and eddy noise in the vacuum cleaner motor.

[0110] Specifically, region 43 corresponds to the region of the fixed impeller in the prior art, where the pressure is relatively high, approximately between -4.457e+03Pa and -2.914e+03Pa.

[0111] In this embodiment of the vacuum cleaner motor, a turbulence structure 60 is provided in the fluid channel 120. In particular, the fluid channels 120 of adjacent impellers 10 are staggered in the design. (Refer to...) Figure 10 The vortex at the impeller assembly 100 was significantly improved, the vortex volume was significantly reduced, and the noise was improved.

[0112] Specifically, region 44 corresponds to the region of the fixed impeller assembly 100, where the pressure is approximately -1.036e+03Pa to -2.564e+03Pa, which is significantly reduced compared to region 43 in the prior art.

[0113] In this embodiment, the fixed impeller 10 can be manufactured by injection molding, and the material is generally a plastic material. Since the moving impeller needs a high speed during operation, a high-strength metal material can be selected. The fixed impeller is a stationary part and can be made of injection-molded plastic. This not only saves processing technology, but also makes the fixed impeller 10 lighter.

[0114] In practice, the annular cover 16, the wheel body 11, and the blades 12 connecting the annular cover 16 and the wheel body 11 of the fixed impeller 10 are integrally formed, and the material is PA66+30%GF. This makes the annular cover 16, the wheel body 11, and the blades 12 connecting the annular cover 16 and the wheel body 11 of the fixed impeller 10 have high strength.

[0115] For example, the thickness of each blade is 1mm to 5mm.

[0116] Figure 11 This is a schematic diagram illustrating the construction process of the fixed impeller assembly provided in the embodiments of this application.

[0117] Reference Figure 11 In the circumferential direction of the impeller body 11, the leading edge 121 of each blade 12 is located in front of the trailing edge 122; and in each fixed impeller 10, the projections of two adjacent blades 12 in the first plane N do not overlap, that is, in the projections of two adjacent blades 12 in the first plane N, the projections of the adjacent leading edges 121 and trailing edges 122 are connected, or the projections of the adjacent leading edges 121 and trailing edges 122 in the first plane N do not overlap, and have a gap of 140. Figure 11 After the two fixed impellers 10 shown are stacked on top of each other, it can be seen that... Figure 11 The gap 140 produced by the fixed impeller 10 on the left side of the figure when viewed from above is... Figure 11 The impeller 10 on the right side of the figure is filled in, that is, this application has achieved an increase in the length of the fluid channel 120 of the impeller assembly 10 while making the mold opening (in the injection molding process) of a single impeller 10 simpler.

[0118] Figure 12 This is a cross-sectional view of the fixed impeller assembly provided in an embodiment of this application. Figure 13 for Figure 12 A magnified view of a portion at point B. Figure 14 This is a schematic diagram of the structure of the first fixed impeller in the fixed impeller assembly provided in the embodiments of this application. Figure 15 This is a schematic diagram of the structure of the second fixed impeller in the fixed impeller assembly provided in the embodiments of this application.

[0119] As mentioned above, the number of fixed impellers 10 can be set as needed. In the following figures and descriptions, this application uses two fixed impellers 10 as an example for illustration. The same applies to other cases where the number of fixed impellers 10 is different, and will not be repeated here.

[0120] For the connection of adjacent impellers 10, such as the connection and anti-detachment of adjacent impellers 10 in the axial direction of the impeller assembly 100, refer to... Figure 12 , Figure 13 As shown, in any two adjacent fixed impellers 10, one fixed impeller 10 is provided with a locking part 13, and the other fixed impeller 10 is provided with a locking engagement part 14 that engages with the locking part 13, so as to restrict the movement of the two adjacent fixed impellers 10 relative to each other along the axial direction O of the fixed impeller assembly.

[0121] In specific implementation, refer to Figure 13 , Figure 14 , Figure 15 In any two adjacent fixed impellers 10, the engaging part 13 is provided on the radial inner side of the wheel body 11 of one of the fixed impellers 10, and the engaging part 14 is provided on the other fixed impeller 10 and extends to the radial inner side of the wheel body 11 of one of the fixed impellers 10 to engage with the engaging part 13.

[0122] For example, the engaging portion 13 is constructed as a hook, and the engaging mating portion 14 is provided with a engaging groove 141 for the engaging portion 13 to engage. Furthermore, the number of engaging portions 13 and engaging mating portions 14 can be set as needed, see reference... Figure 12 In this embodiment, it is described as having two sets of engaging parts 13 and engaging parts 14, and the two sets of engaging parts 13 and engaging parts 14 are arranged opposite each other. The number of them can also be other.

[0123] Reference Figure 13 , Figure 14 , Figure 15 As mentioned above, when there are two fixed impellers 10, for ease of explanation, the fixed impeller located on the upstream side S along the airflow direction is defined as the first fixed impeller 20, and the fixed impeller located on the downstream side X along the airflow direction is defined as the second fixed impeller 30.

[0124] For radial positioning between two adjacent fixed impellers 10, the annular cover 22 and the impeller body 21 of the first fixed impeller are respectively provided with a first mating part 221 and a second mating part 211 extending toward the second fixed impeller 30 and forming annular shapes. The annular cover 32 and the impeller body 31 of the second fixed impeller are respectively provided with a third mating part 222 and a fourth mating part 212 extending toward the first fixed impeller 20 and forming annular shapes. Here, the first mating part 221, the second mating part 211, the third mating part 222, and the fourth mating part 212 are all annular components.

[0125] The first mating part 221 and the third mating part 222 are in contact with each other; the second mating part 211 and the fourth mating part 212 are in contact with each other. This prevents airflow leakage at the junction of the two fixed impellers, giving the fluid passage 120 good airtightness.

[0126] In a specific implementation, the inner side of the first mating part 221 along the radial direction of the fixed impeller assembly 100 can be made to abut against the outer side of the third mating part 222 along the radial direction of the fixed impeller assembly 100.

[0127] The inner side of the second mating part 211 along the radial direction of the fixed impeller assembly 100 is in contact with the outer side of the fourth mating part 212 along the radial direction of the fixed impeller assembly 100.

[0128] It is understandable that during the machining of the fixed impeller 10, insufficient machining accuracy is unavoidable, which may result in the first mating part 221 and the third mating part 222, or the second mating part 211 and the fourth mating part 212, failing to make contact. To avoid this situation and improve the radial fit accuracy of two adjacent fixed impellers 10, it is advisable to construct the inner surface of the first mating part 221 along the radial direction of the fixed impeller assembly 100 and the outer surface of the third mating part 222 along the radial direction of the fixed impeller assembly 100 as matching conical surfaces. In this way, even if the machining accuracy of the first mating part 221 and the third mating part 222 is slightly poor, contact between the first mating part 221 and the third mating part 222 can be achieved by adjusting their relative positions in the axial direction.

[0129] Furthermore, the outer surface of the second mating part 211 along the radial direction of the fixed impeller assembly 100 and the inner surface of the fourth mating part 212 along the radial direction of the fixed impeller assembly 100 are constructed as matching conical surfaces. In this way, even if the machining accuracy of the second mating part 211 and the fourth mating part 212 is slightly poor, the contact between the second mating part 211 and the fourth mating part 212 can be achieved by adjusting their relative positions in the axial direction.

[0130] It should be noted that the inclination direction of the inner side of the first mating part 221 along the radial direction of the fixed impeller assembly 100 should be opposite to that of the outer side of the second mating part 211 along the radial direction of the fixed impeller assembly 100.

[0131] Specifically, the distance between the inner side of the first mating part 221 along the radial direction of the fixed impeller assembly 100 and the outer side of the second mating part 211 along the radial direction of the fixed impeller assembly 100 is defined as d;

[0132] Along the airflow direction, that is, from the upstream side S to the downstream side X, the spacing d gradually increases. That is, the fit between the third fitting part 222, the fourth fitting part 212 and the first fitting part 221, the second fitting part 211 is a wedge fit, which makes the radial deviation of the fit small and does not easily leak air to the surroundings, thus reducing noise.

[0133] As described above, the third mating part 222 and the fourth mating part 212 define a generally inverted conical mating surface with a small end size, making it easy to assemble into the larger groove defined by the first mating part 221 and the second mating part 211, thus making the assembly process simpler and easier.

[0134] Continue to refer to Figure 13The annular cover 22 of the first fixed impeller is provided with a first bearing portion 2211, which abuts against the third mating portion 222 when the first mating portion 221 and the third mating portion 222 are engaged. Here, the first bearing portion 2211 can be a bearing surface provided on the annular cover 22 of the first fixed impeller, and the first bearing portion 2211 is also located inside the first mating portion 221.

[0135] The first fixed impeller has a second bearing portion 2111 on its wheel body 21. The second bearing portion 2111 is used to abut against the fourth mating portion 212 when the second mating portion 211 and the fourth mating portion 212 are mated. Specifically, the second bearing portion 2111 can be a bearing surface provided on the wheel body 21 of the first fixed impeller, and the second bearing portion 2111 is also located outside the second mating portion.

[0136] In some embodiments, a third bearing portion 321 is provided on the annular cover 32 of the second fixed impeller. The third bearing portion 321 is used to abut against the first mating portion 221 when the first mating portion 221 and the third mating portion 222 are mated. Specifically, the third bearing portion 321 may be a bearing surface provided on the annular cover 32 of the second fixed impeller, and the third bearing portion 321 is also located outside the third mating portion 222.

[0137] The second fixed impeller has a fourth bearing portion 311 on its wheel body 31. The fourth bearing portion 311 is used to abut against the second mating portion 211 when the second mating portion 211 and the fourth mating portion 212 are engaged. Specifically, the fourth bearing portion 311 can be a bearing surface provided on the wheel body 31 of the second fixed impeller, and the fourth bearing portion 311 is also located inside the fourth mating portion 212.

[0138] This further improves the sealing performance between the first impeller 20 and the second impeller 30.

[0139] In addition, since both the first fixed impeller 20 and the second fixed impeller 30 are integrally ring-shaped components, anti-rotation structures need to be installed on the first fixed impeller 20 and the second fixed impeller 30.

[0140] In specific implementation, refer to Figure 14 , Figure 15 In the first fixed impeller 20 and the second fixed impeller 30, one of them is provided with a positioning post 23, and the other is provided with a positioning groove 24 that matches the positioning post 23; for example, the first fixed impeller 20 is provided with a positioning post 23, and the second fixed impeller 30 is provided with a positioning groove 24.

[0141] When the first mating part 221 and the third mating part 222 are in contact and mating, and when the second mating part 211 and the fourth mating part 212 are in contact and mating, the positioning pin 23 is inserted into the positioning groove 24.

[0142] Here, the number of positioning pins 23 and positioning slots 24 can be set as a set, for example, the positioning pins 23 and positioning slots 24 are set at positions that are offset from the engaging parts 14 and engaging parts 13.

[0143] In addition, combined Figure 14 and Figure 3 The annular cover 22 of the first fixed impeller has a locking protrusion structure 40 on its radially outer surface. A snap-fit ​​structure 41 is also provided on the impeller cover 220 at a position corresponding to the locking protrusion structure 40. Through the cooperation of the locking protrusion structure 40 and the snap-fit ​​structure 41, the impeller cover 220 can be fixed to the fixed impeller assembly 100. The number of snap-fit ​​structures 41 and locking protrusion structures 40 can be set in multiple sets according to actual needs, and their positions can be, for example, evenly distributed along the circumference of the vacuum cleaner motor 200.

[0144] In this embodiment of the application, combined with Figure 14 , Figure 2 , Figure 3 The impeller assembly 100 also includes a baffle 50, which is constructed in an annular shape and positioned radially inside the inner guide ring 150. This allows moisture in the fluid channel 120 of the impeller assembly 100 to be blocked by the baffle 50 and prevented from entering the motor body 230.

[0145] In a specific implementation, a base 42 is provided on the upstream end face of the first impeller body 21, and the baffle 50 can be connected to the base 42. In addition, a sealing ring can be provided between the baffle 50 and the motor body 230 for better sealing and isolation.

[0146] Figure 16 This is a cross-sectional view of the combined blades in the fixed impeller assembly provided in an embodiment of this application.

[0147] In the embodiments of this application, reference is made to Figure 16 Each composite blade 110 is constructed in an airfoil shape, with the leading edge 1101 of the composite blade positioned upstream of the trailing edge 1102 along the airflow direction. This effectively reduces noise on the pressure and suction surfaces of the composite blades, suppressing noise from the separated flow.

[0148] Figure 17 This is a schematic diagram of the structure of a vacuum cleaner provided in an embodiment of this application. (Refer to...) Figure 17 As shown, this application embodiment also provides a vacuum cleaner 300, including the aforementioned vacuum cleaner motor 200. It is understood that the structure, function, and working principle of the vacuum cleaner motor 200 have been described in detail and will not be repeated here.

[0149] In a specific implementation, the vacuum cleaner 300 may include a body 330, a floor brush 310 and a dust cup 320 disposed on the body 330, and a vacuum cleaner motor 200 also disposed on the body 330. The floor brush 310 is used to clean the surface to be cleaned, and the floor brush 310, the dust cup 320 and the vacuum cleaner motor 200 are fluidly connected.

[0150] For example, dirt on the surface to be cleaned can enter the dust cup 320 through the air intake on the floor brush 310. The fluid filtered in the dust cup 320 then enters the vacuum cleaner motor 200 through the air intake side and flows out to the outside through the air outlet side of the vacuum cleaner motor 200.

[0151] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0152] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A vacuum cleaner motor, characterized in that, It includes a moving impeller (210) and a fixed impeller assembly (100) arranged coaxially, with the moving impeller (210) located upstream of the fixed impeller assembly (100) along the airflow direction; The impeller assembly (100) includes a plurality of impellers (10) arranged coaxially. Each impeller (10) includes a wheel body (11) and a plurality of blades (12) disposed along the outer surface of the wheel body (11) in the circumferential direction. Each blade (12) includes a root fixed to the wheel body (11), a top spaced apart from the wheel body (11), a leading edge (121) extending between the root and the top, and a trailing edge (122) extending between the root and the top. Each of the fixed impellers (10) has blades (12) arranged in a one-to-one correspondence. In any two adjacent fixed impellers (10), the leading edge (121) and trailing edge (122) of the two corresponding blades (12) are connected, so that the corresponding blades (12) in the multiple fixed impellers (10) form a continuous combined blade (110). A fluid channel (120) for guiding flow is formed between any two adjacent combined blades (110). Among them, at least one of the combined blades (110) has a turbulence structure (60) on its profile to cause the pressure distribution of the fluid channel (120) at different positions in the airflow direction to be layered.

2. The vacuum cleaner motor according to claim 1, characterized in that, The turbulence structure (60) is configured as a recessed or protruding structure formed on the profile of the combined blade (110). and / or The turbulence structure (60) is located at the junction of two adjacent blades (12) that constitute the same combined blade (110).

3. The vacuum cleaner motor according to claim 1, characterized in that, Multiple fixed impellers (10) are staggered in the axial direction of the fixed impeller assembly (100) to form a stepped structure on the inner wall of the fluid channel (120), the stepped structure forming the turbulence structure (60).

4. The vacuum cleaner motor according to claim 1, characterized in that, In the circumferential direction of the wheel body (11), the leading edge (121) of each blade (12) is located in front of the trailing edge (122); The projections of two adjacent blades (12) of each of the fixed impellers (10) in a plane perpendicular to the axis of the fixed impeller assembly (100) do not overlap.

5. The vacuum cleaner motor according to claim 1, characterized in that, In any two adjacent fixed impellers (10), one of the fixed impellers (10) is provided with a locking part (13), and the other fixed impeller (10) is provided with a locking engagement part (14) that engages with the locking part (13), so as to restrict the movement of the two adjacent fixed impellers (10) relative to each other along the axial direction of the fixed impeller assembly.

6. The vacuum cleaner motor according to claim 5, characterized in that, The wheel body (11) is constructed as a ring; Each of the fixed impellers (10) further includes an annular cover (16) coaxially sleeved on the wheel body (11) circumferentially outward, and the top (124) of the blade (12) is connected to the annular cover (16). The wheel bodies (11) of each of the fixed impellers (10) are connected to each other to form a flow guiding inner ring (150), and the annular covers (16) of each of the fixed impellers (10) are connected to each other to form a flow guiding outer ring (160). The combined blade (110) is located between the inner guide ring (150) and the outer guide ring (160), and any two adjacent combined blades (110), together with the inner guide ring (150) and the outer guide ring (160), define the fluid channel (120).

7. The vacuum cleaner motor according to claim 6, characterized in that, The annular cover (16), the wheel body (11), and the blades (12) connecting the annular cover (16) and the wheel body (11) of the fixed impeller (10) are integrally formed and are made of PA66+30%GF.

8. The vacuum cleaner motor according to claim 6, characterized in that, The thickness of each blade is 1mm to 5mm.

9. The vacuum cleaner motor according to claim 6, characterized in that, In any two adjacent fixed impellers (10), the engaging part (13) is provided on the radial inner side of the wheel body (11) of one of the fixed impellers (10), and the engaging part (14) is provided on the other fixed impeller (10) and extends to the radial inner side of the wheel body (11) of one of the fixed impellers (10) to engage with the engaging part (13).

10. The vacuum cleaner motor according to claim 9, characterized in that, The engaging part (13) is constructed as a hook, and the engaging mating part (14) is provided with a engaging groove (141) for the engaging part (13) to be engaged.

11. The vacuum cleaner motor according to claim 6, characterized in that, The number of the fixed impellers (10) is two; The fixed impeller located upstream along the airflow direction is defined as the first fixed impeller (20), and the fixed impeller located downstream along the airflow direction is defined as the second fixed impeller (30). The first fixed impeller has a first mating part (221) and a second mating part (211) that extend toward the second fixed impeller (30) and are in an annular shape, respectively. The second fixed impeller has a third mating part (222) and a fourth mating part (212) that extend toward the first fixed impeller (20) and are in an annular shape, respectively. The first mating part (221) is in contact with the third mating part (222); the second mating part (211) is in contact with the fourth mating part (212).

12. The vacuum cleaner motor according to claim 11, characterized in that, The inner side of the first mating part (221) along the radial direction of the fixed impeller assembly (100) is in contact with the outer side of the third mating part (222) along the radial direction of the fixed impeller assembly (100). The outer surface of the second mating part (211) along the radial direction of the fixed impeller assembly (100) is in contact with the inner surface of the fourth mating part (212) along the radial direction of the fixed impeller assembly (100).

13. The vacuum cleaner motor according to claim 11, characterized in that, The inner surface of the first mating part (221) along the radial direction of the fixed impeller assembly (100) and the outer surface of the third mating part (222) along the radial direction of the fixed impeller assembly (100) are constructed as conical surfaces that match each other. The outer surface of the second mating part (211) along the radial direction of the fixed impeller assembly (100) and the inner surface of the fourth mating part (212) along the radial direction of the fixed impeller assembly (100) are constructed as conical surfaces that match each other. The distance between the inner side of the first mating part (221) along the radial direction of the fixed impeller assembly (100) and the outer side of the second mating part (211) along the radial direction of the fixed impeller assembly (100) is defined as d; Along the direction of airflow, the spacing d gradually increases.

14. The vacuum cleaner motor according to claim 11, characterized in that, The first fixed impeller has a first bearing part (2211) on its annular cover (22). The first bearing part (2211) is used to abut against the third mating part (222) when the first mating part (221) and the third mating part (222) are mated. The first impeller has a second bearing portion (2111) on its wheel body (21). The second bearing portion (2111) is used to abut against the fourth mating portion (212) when the second mating portion (211) and the fourth mating portion (212) are mated; and / or The second fixed impeller has a third bearing portion (321) on its annular cover (32), which is used to abut against the first mating portion (221) when the first mating portion (221) and the third mating portion (222) are mated; The second fixed impeller has a fourth bearing part (311) on its wheel body (31), which is used to abut against the second mating part (211) when the second mating part (211) and the fourth mating part (212) are mated.

15. The vacuum cleaner motor according to any one of claims 11 to 14, characterized in that, In the first fixed impeller (20) and the second fixed impeller (30), one is provided with a positioning post (23), and the other is provided with a positioning groove (24) that matches the positioning post (23). When the first mating part (221) is in contact with the third mating part (222) and the second mating part (211) is in contact with the fourth mating part (212), the positioning post (23) is inserted into the positioning groove (24).

16. The vacuum cleaner motor according to any one of claims 12 to 14, characterized in that, The annular cover (22) of the first fixed impeller is provided with a locking protrusion structure (40) on the outer radial side.

17. The vacuum cleaner motor according to any one of claims 11 to 14, characterized in that, The first fixed impeller (20) has a base (42) at the upstream end face of the wheel body (21); The fixed impeller assembly (100) also includes a baffle (50) disposed on the base (42), the baffle (50) being constructed in an annular shape and positioned radially inside the inner guide ring (150).

18. The vacuum cleaner motor according to any one of claims 1 to 14, characterized in that, Each of the combined blades (110) is configured to be airfoil-shaped, with the leading edge (1101) of the combined blade located upstream of the trailing edge (1102) of the combined blade in the direction of airflow.

19. The vacuum cleaner motor according to any one of claims 1 to 14, characterized in that, All blades (12) in the fixed impeller assembly (100) have the same thickness.

20. The vacuum cleaner motor according to any one of claims 1 to 14, characterized in that, In the projection of the fixed impeller assembly (100) onto a first plane, the projections of two adjacent combined blades (110) have an overlapping area (130), wherein the first plane is perpendicular to the axial direction of the fixed impeller assembly (100).

21. The vacuum cleaner motor according to any one of claims 1 to 14, characterized in that, The vacuum cleaner motor (200) also includes an impeller cover (220), which is connected to the fixed impeller assembly (100) and covers the side of the moving impeller (210) opposite to the fixed impeller assembly (100); and / or The vacuum cleaner motor (200) also includes a motor body (230), which is located on the side of the fixed impeller assembly (100) away from the moving impeller (210). The output shaft of the motor body (230) passes through the fixed impeller assembly (100) and is connected to the moving impeller (210) in a transmission connection.

22. A vacuum cleaner, characterized in that, Includes a vacuum cleaner motor (200) as described in any one of claims 1 to 21.

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