Duct components and vacuum cleaner

Abstract

This application provides an air duct assembly and a vacuum cleaner. The air duct assembly includes: a cylindrical body, which is a hollow structure with an air inlet and an air outlet. The cylindrical body has a guide section extending from the inner wall of the cylindrical body towards the center. A guide surface is provided on the side of the guide section near the air inlet, with the portion of the guide surface closer to the inner wall of the cylindrical body being closer to the air inlet. The guide surface and the inner wall of the cylindrical body enclose an air inlet duct; an air guide component connected to the guide section, having an air guide duct communicating with the air inlet duct; and a cover connected to the air guide component and placed over the air outlet, with an air outlet communicating with the air guide duct. This design allows airflow to flow more smoothly along the guide surface, facilitating a smooth transition from the air inlet duct to the air guide duct, reducing the possibility of airflow separation and the generation of eddies and turbulence, improving the stability of airflow, reducing noise in the air duct assembly, reducing air resistance, and reducing energy consumption.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to an air duct assembly and a vacuum cleaner. Background Technology

[0002] With increasing emphasis on hygiene management, vacuum cleaners are becoming more and more widely used. Vacuum cleaners work by using an electric motor to generate negative pressure to suck up dust and debris from the air, and are equipped with different types of nozzles, brushes, and air nozzles to meet the cleaning needs of different surfaces.

[0003] Currently, vacuum cleaners using related technologies suffer from insufficient airflow in their ducts. This can cause eddies at duct bends, generating noise, increasing internal air resistance, and raising overall energy consumption, thus negatively impacting the user experience. Utility Model Content

[0004] In view of this, this application provides an air duct assembly and a vacuum cleaner that can make the airflow within the air duct smoother and more efficient, thereby reducing the noise and energy consumption of the vacuum cleaner.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, this application provides an air duct assembly, the air duct assembly comprising:

[0007] The cylinder is a hollow structure with an air inlet and an air outlet. The cylinder is provided with a guide section that extends from the inner wall of the cylinder towards the center of the cylinder. The guide section has a guide surface on the side near the air inlet. The part of the guide surface that is closer to the inner wall of the cylinder is closer to the air inlet. The guide surface and the inner wall of the cylinder form an air inlet duct.

[0008] An air guide component is connected to the airflow guide portion, and the air guide component has an airflow guide duct that communicates with the air inlet duct;

[0009] The cover is connected to the air guide and is placed on the air outlet end. The cover has an air outlet that communicates with the air guide duct.

[0010] In the technical solution of this application, by setting the part of the air guide surface closer to the inner wall of the cylinder to be closer to the air inlet, the air guide surface is continuously tapered in the direction from the air inlet to the air outlet, so that the airflow can flow more smoothly along the air guide surface. This helps the airflow to smoothly transition from the air inlet duct to the air guide duct, reduces the possibility of airflow separation and the generation of eddies and turbulence, improves the stability of airflow, and helps to reduce noise in the duct assembly, reduce air resistance, and reduce energy consumption.

[0011] In one possible implementation, the air guide surface is an arc surface, and the center of curvature of the air guide surface is located on the side of the air guide near the air inlet end.

[0012] In the technical solution of this application, the curved design of the air guide surface can better fit the airflow characteristics, allowing the airflow to flow more smoothly along the curved surface and better reduce surface friction and the generation of local eddies; the air guide surface has an arch-like shape and protrudes towards the air outlet end of the cylinder, which makes the transition and connection between the edge of the air guide surface and the inner wall of the cylinder smoother, which can improve the air guiding effect of the air guide surface and further reduce turbulence, wind resistance and noise.

[0013] In one possible implementation, the cover is detachably connected to the air guide.

[0014] In the technical solution of this application, by setting the cover and the air guide to be detachably connected, it is convenient to maintain and clean the air duct assembly, and the assembly process of the air duct assembly is simplified, which is conducive to improving the assembly efficiency of the air duct assembly.

[0015] In one possible implementation, the air duct assembly further includes a bracket, which is connected to the flow guide and the air guide respectively. The bracket is provided with an air inlet hole, and the air guide duct is connected to the air inlet duct through the air inlet hole.

[0016] The air guide includes a main body and a mounting part connected together. The main body is cylindrical and the mounting part is located at one end of the main body. The mounting part is arranged around the outer periphery of the main body and protrudes outward relative to the side wall of the main body. The end of the main body opposite to the mounting part is inserted into the bracket. The mounting part is located on the side of the bracket close to the cover.

[0017] In the technical solution of this application, the connection between the air guide and the flow guide is realized by setting a bracket, which provides support for the air guide.

[0018] In one possible implementation, one end of the bracket extends from the guide portion into the air inlet duct, and there are multiple air inlets that are evenly spaced around the central axis of the bracket and located on the side wall of the bracket.

[0019] In the technical solution of this application, by extending the bracket directly into the air inlet duct, the axial distance of the airflow from the air inlet duct to the air guide duct is shortened. The airflow guided by the air guide surface flows to the center of the air guide section and directly passes through the air inlet hole on the side wall of the bracket to enter the bracket and then flows into the air guide duct. This makes the transition of the airflow between the air inlet duct and the bracket smoother and more direct, reduces the airflow disturbance in the transition area, and further promotes the smooth flow of airflow inside the air duct assembly.

[0020] In one possible implementation, the air duct assembly further includes a first air guide cone, which is installed in the bracket and located at one end of the bracket away from the air guide member. The cross-sectional profile of the first air guide cone gradually decreases along the direction from the air inlet end to the air outlet end. The first air guide cone is used to guide the airflow at the air inlet to the air guide channel.

[0021] In the technical solution of this application, the first air guide cone can smoothly guide and turn the airflow entering the cylinder from the air inlet along the radial direction of the cylinder, so that the airflow mainly flows along the axial direction of the cylinder to the air guide duct. The first air guide cone has a rectification effect on the airflow, making the airflow entering the air guide duct more orderly and uniform, and reducing the noise and energy loss caused by airflow impact.

[0022] In one possible implementation, the first air guide cone is a rotating body, and the central axis of the first air guide cone coincides with the central axis of the support.

[0023] In the technical solution of this application, since the first guide cone is a symmetrical rotating body and the central axis of the first guide cone coincides with the central axis of the support, under the guidance of the first guide cone, the airflow entering the cylinder radially is more uniform, smooth and symmetrical. This avoids problems such as airflow deflection, instability or local eddies that may be caused by the asymmetrical cone structure, improves the uniformity and turning stability of the airflow, and helps to enhance the rectification effect of the first guide cone and improve the noise reduction effect of the duct assembly.

[0024] In one possible implementation, the air outlet is located at least on the side wall of the cover; the air duct assembly further includes a second air guide cone, which is mounted on the cover and disposed opposite to the first air guide cone. The second air guide cone includes a conical portion, the cross-sectional profile of which gradually increases in size along the direction from the air inlet to the air outlet, and the conical portion is used to guide airflow to the air outlet.

[0025] In the technical solution of this application, the outer diameter of the cone gradually increases along the direction from the air inlet end to the air outlet end of the cylinder, so that the cone presents a gradually expanding structure. The cone can guide the airflow flowing out of the air duct to smoothly turn, so that the airflow gradually transitions from axial flow to radial flow, thereby guiding the airflow to diffuse smoothly, decelerate and flow to the air outlet, reducing the possibility of airflow stripping, backflow or vortex formation near the air outlet, making the discharged airflow more stable and the noise lower.

[0026] In one possible implementation, the second air guide cone is a rotating body, and the central axis of the first air guide cone coincides with the central axis of the cone-shaped portion.

[0027] In the technical solution of this application, by setting the central axis of the first guide cone to coincide with the central axis of the cone-shaped part, it is ensured that the first guide cone and the second guide cone are coaxially installed in the air duct assembly. The airflow rectified by the first guide cone flows along the central axis of the first guide cone to the second guide cone. Under the guidance of the second guide cone, it smoothly diffuses from the central area of ​​the second guide cone to the surrounding area, avoiding problems such as flow channel eccentricity, airflow deviation, and asymmetric vortex caused by cone misalignment, which helps to reduce noise and additional wind resistance.

[0028] In one possible implementation, the air duct assembly further includes a breathable noise reduction element disposed within the space defined by the cover and the air guide and located downstream of the air guide duct.

[0029] In the technical solution of this application, the breathable noise reduction component can absorb noise and pollutants such as dust carried in the airflow while allowing airflow to pass through. This not only improves the noise reduction effect at the downstream end of the air duct component, but also prevents pollutants from flowing out of the air duct component.

[0030] In one possible implementation, the breathable noise-reducing element is ring-shaped.

[0031] In the technical solution of this application, not only is the breathable noise reduction component adapted to the shape of the cover, but the hollow structure in the middle of the breathable noise reduction component is also used to ensure that the airflow is not blocked, thus avoiding the impact on wind resistance. At the same time, noise and pollutants such as dust carried in the airflow are effectively absorbed at the downstream end of the air duct component.

[0032] Secondly, this application provides a vacuum cleaner, which includes the air duct assembly provided in any embodiment of the first aspect.

[0033] The beneficial effects of the technical solutions provided in this application include at least the following: Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 An exploded view of the air duct assembly provided in the embodiments of this application;

[0036] Figure 2 An exploded cross-sectional view of the air duct assembly provided in an embodiment of this application;

[0037] Figure 3 A partial cross-sectional view of the air duct assembly provided in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the structure of the cylinder provided in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the air guide provided in the embodiments of this application;

[0040] Figure 6 This is a schematic diagram of the structure of the cover provided in an embodiment of this application;

[0041] Figure 7 A schematic diagram illustrating the cooperation between the bracket and the first air guide cone provided in an embodiment of this application;

[0042] Figure 8 This is a schematic diagram of the structure of the second air guide cone provided in an embodiment of this application.

[0043] The reference numerals in the figure indicate:

[0044] 1-Cylinder body; 11-Flow guide section; 111-Air guide surface; 112-Second connecting hole; 12-Air inlet end; 13-Air outlet end;

[0045] 2-Air guide; 21-Main body; 211-Second buckle; 22-Mounting part; 221-First buckle; 3-Cover; 31-Air outlet; 32-First mating part; 321-Buckling hole; 33-Third buckle;

[0046] 4-Support; 41-Cylindrical part; 411-Snap-fit ​​groove; 42-Bearing part; 421-First connecting hole; 43-Air inlet;

[0047] 5-First guide cone;

[0048] 6-Second guide cone; 61-Conical part; 62-Annular part; 621-Snap-fit ​​hole;

[0049] 7- Breathable and noise-reducing components;

[0050] 100 - Air inlet duct; 200 - Air guide duct.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative relationships shown in the figures. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute directions. When the product is placed in different orientations, the orientation may change; for example, "up" and "down" may be interchanged.

[0054] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0055] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0056] With increasing emphasis on hygiene management, vacuum cleaners are becoming more and more widely used. Vacuum cleaners work by using an electric motor to generate negative pressure to suck up dust and debris from the air, and are equipped with different types of nozzles, brushes, and air nozzles to meet the cleaning needs of different surfaces.

[0057] Vacuum cleaner noise primarily consists of airborne noise, electromagnetic noise, and mechanical noise. Airborne noise is mainly caused by pressure changes and vortex shedding as air flows through the internal components of the vacuum cleaner. When air passes through the vacuum cleaner's ducts and fan, turbulence is generated, which excites vibrations in the ducts and fan blades, thus producing noise. Near the air inlet and outlet of the vacuum cleaner, airflow forms vortices, which create pressure fluctuations on the inner walls of the ducts and fan blades, further generating noise. Improper duct design can lead to obstructed airflow and increased noise.

[0058] Currently, vacuum cleaners using related technologies suffer from insufficient airflow in their ducts. This can cause eddies at duct bends, generating noise, increasing internal air resistance, and raising overall energy consumption, thus negatively impacting the user experience.

[0059] To address the aforementioned technical problems, this application provides an air duct assembly and a vacuum cleaner that enables smoother and more efficient airflow within the air duct, thereby reducing the noise and energy consumption of the vacuum cleaner.

[0060] like Figures 1 to 3As shown, the air duct assembly provided in this application embodiment includes a cylinder 1, an air guide 2, and a cover 3.

[0061] like Figure 4 As shown, the cylinder 1 is a hollow structure with an air inlet end 12 and an air outlet end 13. The cylinder 1 is provided with a guide section 11, which extends from the inner wall of the cylinder 1 toward the center of the cylinder 1. The guide section 11 is provided with a guide surface 111 on the side near the air inlet end 12. The part of the guide surface 111 that is closer to the inner wall of the cylinder 1 is closer to the air inlet end 12. The guide surface 111 and the inner wall of the cylinder 1 enclose each other to form an air inlet duct 100.

[0062] The air guide 2 is connected to the air guide section 11, and the air guide 2 has an air guide duct 200 that communicates with the air inlet duct 100.

[0063] The cover 3 is connected to the air guide 2 and is placed on the air outlet 13. The cover 3 has an air outlet 31 that is connected to the air guide duct 200.

[0064] The cylinder 1 is used to connect to the vacuum cleaner's nozzle and also to house electronic components such as the vacuum cleaner's drive mechanism. Please refer to [reference needed]. Figure 1 and Figure 4 The cylinder 1 is generally cylindrical, and the flow guide 11 has a through hole at its center. The orthographic projection of the flow guide 11 onto a plane perpendicular to the axial direction of the cylinder 1 is annular. The through hole is used to connect with the air guide 2 and / or communicate with the air guide duct 200. Optionally, the cylinder 1 and the flow guide 11 are integrally connected, which facilitates processing and manufacturing and helps to improve the connection strength between the cylinder 1 and the flow guide 11.

[0065] The air inlet 12 and air outlet 13 of the cylinder 1 are two opposite ends of the cylinder 1 along its own axial direction, for example... Figure 4 As shown, the lower end of the cylinder 1 is the air inlet 12, and the upper end of the cylinder 1 is the air outlet 13. The airflow flows from the air inlet 12 to the air outlet 13. The large diameter end of the air guide surface 111 is closer to the air inlet 12 of the cylinder 1 than the small diameter end.

[0066] The inner diameter of the guide section 11 gradually decreases from the air inlet end 12 to the air outlet end 13, that is, the air guide surface 111 continuously tapers from the air inlet end 12 to the air outlet end 13 of the cylinder 1. The air guide surface 111 can be conical, arched, trumpet-shaped, etc. Compared with the design of the air guide surface 111 being planar and perpendicular to the axis of the cylinder 1 in related technologies, the air duct assembly provided in this application enhances the air guiding capacity of the air guide surface 111 by setting the air guide surface 111 to be continuously taper, so that the air guide surface 111 can guide the airflow to flow smoothly from the large diameter end to the small diameter end of the air guide surface 111, so that the airflow smoothly transitions from the air inlet duct 100 to the air guide duct 200, reducing the possibility of turbulence generation, improving the stability of airflow, thereby making the airflow smoother, reducing noise, and the smooth flow of airflow reduces energy loss, reduces air resistance, and correspondingly reduces the energy consumption of driving the airflow.

[0067] The air guide 2 is connected to the airflow guide 11 and the cover 3 respectively. The air guide 2 has a hollow structure and its inner wall forms an airflow duct 200. Figure 3 As shown, Figure 3 The arrows in the diagram indicate the direction of airflow. The airflow enters the air guide duct 200 from the air inlet duct 100 and then flows out from the air outlet 31 of the cover 3.

[0068] The cover 3 is generally cylindrical and includes a top wall and a side wall connected to the edge of the top wall. The side wall is perpendicular to the top wall, and the air outlet 31 can be provided on the top wall and / or side wall of the cover 3.

[0069] The air duct assembly provided in this application embodiment, by setting the portion of the air guide surface 111 closer to the inner wall of the cylinder 1 to be closer to the air inlet end 12, makes the air guide surface 111 continuously tapering in the direction from the air inlet end 12 to the air outlet end 13. This allows the airflow to flow more smoothly along the air guide surface 111, facilitating a smooth transition of airflow from the air inlet duct 100 to the air outlet duct 200, reducing the possibility of airflow separation and the generation of eddies and turbulence, improving the stability of airflow, and helping to reduce noise in the air duct assembly, reduce air resistance, and reduce energy consumption.

[0070] In some embodiments, the air guide surface 111 is an arc surface, and the center of curvature of the air guide surface 111 is located on the side of the air guide 2 near the air inlet end 12 of the cylinder 1.

[0071] The curved design of the air guide surface 111 can better fit the airflow characteristics, allowing the airflow to flow more smoothly along the curved surface and better reduce surface friction and the generation of local eddies.

[0072] like Figure 3As shown, the longitudinal section of the air guide surface 111 is arc-shaped. Since the center of curvature of the air guide surface 111 is located on the side of the air guide 2 near the air inlet end 12 of the cylinder 1, the air guide surface 111 has an arch-like shape and protrudes towards the air outlet end 13 of the cylinder 1. This makes the transition and connection between the edge of the air guide surface 111 and the inner wall of the cylinder 1 smoother, which can improve the air guiding effect of the air guide surface 111 and further reduce turbulence, wind resistance and noise. It can be understood that the above "longitudinal section" is the section obtained by cutting with a plane containing the central axis of the cylinder 1, that is... Figure 3 The cross-section shown.

[0073] In some embodiments, the cover 3 and the air guide 2 are detachably connected.

[0074] For example, the cover 3 and the air guide 2 can be detachably connected by means of threaded fasteners, snap-fit ​​connections, etc.

[0075] The cover 3 is frequently exposed to airflow and pollutants such as dust carried by the airflow. The detachable connection between the cover 3 and the air guide 2 allows the user to more easily remove the cover 3, clean the dust and dirt attached to the inside of the cover 3, keep the airflow inside the air duct assembly unobstructed, and avoid increased wind resistance, increased noise and unstable airflow inside the air duct assembly due to blockage.

[0076] In this embodiment, by setting the cover 3 and the air guide 2 to be detachably connected, it is convenient to maintain and clean the air duct assembly, and the assembly process of the air duct assembly is simplified, which is conducive to improving the assembly efficiency of the air duct assembly.

[0077] In some optional embodiments, the air guide 2 is provided with a first buckle 221, which is used to connect with the cover 3.

[0078] like Figure 5 and Figure 6 As shown, the end of the air guide 2 is provided with a first buckle 221, and the inner wall of the cover 3 is provided with a first mating part 32. The first mating part 32 has a buckle hole 321. The first buckle 221 can pass through the buckle hole 321 and engage with the first mating part 32 to realize the detachable connection between the air guide 2 and the cover 3.

[0079] In some embodiments, the air duct assembly further includes a bracket 4, which is connected to the flow guide 11 and the air guide 2 respectively. The bracket 4 is provided with an air inlet 43, and the air guide duct 200 is connected to the air inlet duct 100 through the air inlet 43.

[0080] like Figure 5As shown, the air guide 2 includes a main body 21 and a mounting part 22 connected together. The main body 21 is cylindrical and the mounting part 22 is located at one end of the main body 21. The mounting part 22 is arranged around the outer periphery of the main body 21 and protrudes outward relative to the side wall of the main body 21. The end of the main body 21 facing away from the mounting part 22 is inserted into the bracket 4. The mounting part 22 is located on the side of the bracket 4 near the cover 3.

[0081] Please refer to Figure 7 The support 4 includes a connected cylindrical portion 41 and a supporting portion 42. The cylindrical portion 41 is a hollow structure. The supporting portion 42 is located at the first end of the cylindrical portion 41 and connected to the edge of the cylindrical portion 41. The supporting portion 42 is perpendicular to the axial direction of the cylindrical portion 41 and protrudes outward relative to the side wall of the cylindrical portion 41, thus making the supporting portion 42 annular. The supporting portion 42 abuts against the side surface of the mounting portion 22 opposite to the cover 3, thereby providing support for the air guide 2.

[0082] The air inlet 43 can be provided on the end face of the cylindrical part 41 away from the cover 3 and / or on the side wall of the cylindrical part 41. The airflow of the air inlet duct 100 passes through the air inlet 43 and enters the air guide duct 200, and then flows out from the air outlet 31.

[0083] Optionally, the bracket 4 is detachably connected to the air guide 11 and the air guide 2, which facilitates the maintenance and cleaning of the air duct assembly and simplifies the assembly process of the air duct assembly, thereby improving the assembly efficiency of the air duct assembly.

[0084] For example, the bracket 4 and the guide section 11 are detachably connected by means of threaded fasteners, snap-fit ​​connections, etc., and the bracket 4 and the air guide 2 are detachably connected by means of threaded fasteners, snap-fit ​​connections, etc.

[0085] For example, such as Figure 4 and Figure 7 As shown, the support portion 42 of the bracket 4 is provided with a plurality of first connecting holes 421, and the guide portion 11 is provided with a plurality of second connecting holes 112, with the plurality of first connecting holes 421 and the plurality of second connecting holes 112 arranged in a one-to-one correspondence. The first connecting holes 421 and the second connecting holes 112 are used to allow threaded fasteners to be inserted, thereby realizing a detachable connection between the bracket 4 and the guide portion 11.

[0086] For example, such as Figure 5 and Figure 7 As shown, the inner wall of the cylindrical part 41 of the bracket 4 is recessed to form a snap-fit ​​groove 411, and the outer wall of the main body part 21 of the air guide 2 is provided with a second buckle 211. The second buckle 211 can be inserted into the snap-fit ​​groove 411, thereby realizing a detachable connection between the bracket 4 and the air guide 2.

[0087] In some embodiments, one end of the bracket 4 extends from the guide portion 11 into the air inlet duct 100, and there are multiple air inlet holes 43. The multiple air inlet holes 43 are evenly spaced around the central axis of the bracket 4, and the multiple air inlet holes 43 are located on the side wall of the bracket 4.

[0088] like Figure 3 As shown, the end of the cylinder 1 of the support 4 that is away from the cover 3 passes through the through hole at the center of the guide section 11 and extends into the air inlet duct 100. Multiple air inlets 43 are located on the side wall of the cylinder 1.

[0089] By extending the bracket 4 directly into the air inlet duct 100, the axial distance of the airflow from the air inlet duct 100 to the air guide duct 200 is shortened. The airflow guided by the air guide surface 111 flows to the center of the air guide section 11 and directly passes through the air inlet hole 43 on the side wall of the bracket 4 to enter the bracket 4 and then flows into the air guide duct 200. This makes the transition of the airflow between the air inlet duct 100 and the bracket 4 smoother and more direct, reduces the airflow disturbance in the transition area, and further promotes the smooth flow of airflow inside the duct assembly.

[0090] Multiple air inlets 43 are evenly spaced along the circumference of the support 4, allowing airflow to enter the interior of the support 4 from the periphery of the support 4 along the radial direction of the support 4. This improves the uniformity of airflow distribution, prevents large high-speed airflows from directly impacting the inner wall of the cover 3, and reduces strong eddies, vibrations, and noise caused by the impact.

[0091] In some embodiments, the air duct assembly further includes a first air guide cone 5, which is installed in the bracket 4 and located at one end of the bracket 4 away from the air guide member 2. The cross-sectional profile of the first air guide cone 5 gradually decreases along the direction from the air inlet end 12 to the air outlet end 13 of the cylinder 1. The first air guide cone 5 is used to guide the airflow at the air inlet 43 to the air guide channel.

[0092] It is understandable that the aforementioned "cross section" is the cross section obtained by cutting with a plane perpendicular to the central axis of cylinder 1.

[0093] like Figure 3 and Figure 7 As shown, the first air guide cone 5 is located inside the cylinder 1 of the support 4 and is connected to the end wall of the support 4 away from the air guide 2. Optionally, the first air guide cone 5 and the support 4 can be detachably connected, for example, by means of threaded fasteners, snap-fit ​​connections, etc.

[0094] The outer diameter of the first guide cone 5 gradually decreases along the direction from the air inlet end 12 to the air outlet end 13 of the cylinder 1, making the first guide cone 5 have a tapered structure. This can smoothly guide and turn the airflow entering the cylinder 1 from the air inlet hole 43 along the radial direction of the cylinder 1, so that the airflow mainly flows along the axial direction of the cylinder 1 to the air guide duct 200. The first guide cone 5 has a rectification effect on the airflow, making the airflow entering the air guide duct 200 more orderly and uniform, and reducing the noise and energy loss caused by airflow impact.

[0095] In some embodiments, the first air guide cone 5 is a rotating body, and the central axis of the first air guide cone 5 coincides with the central axis of the support 4.

[0096] For example, the surface of the first guide cone 5 used to guide airflow is arc-shaped. For example Figure 3 As shown, in the longitudinal section of the first guide cone 5, the curvature center of the arcs on both sides of the axis of symmetry is located on the side of the first guide cone 5 closer to the guide member 2. The longitudinal section of the first guide cone 5 is roughly "human" shaped, which makes the transition between the edge area of ​​the first guide cone 5 and the airflow entering the cylinder 1 radially along the cylinder 1 smoother, ensuring that the airflow entering the cylinder 1 from the air inlet 43 can more smoothly and easily change from radial flow to axial flow.

[0097] Since the first guide cone 5 is a symmetrical rotating body and the central axis of the first guide cone 5 coincides with the central axis of the support 4, under the guidance of the first guide cone 5, the airflow entering the cylinder 1 radially is more uniform, smooth and symmetrical. This avoids problems such as airflow deflection, instability or local vortices that may be caused by the asymmetrical cone structure, improves the uniformity and turning stability of the airflow, and helps to enhance the rectification effect of the first guide cone 5 and improve the noise reduction effect of the air duct assembly.

[0098] In some embodiments, please refer to Figure 3 The air outlet 31 is located at least on the side wall of the cover 3. The air duct assembly also includes a second air guide cone 6, which is installed on the cover 3 and is disposed opposite to the first air guide cone 5. The second air guide cone 6 includes a cone-shaped portion 61, the cross-sectional profile of which gradually increases along the direction from the air inlet end 12 to the air outlet end 13 of the cylinder 1. The cone-shaped portion 61 is used to guide the airflow to the air outlet 31.

[0099] The outer diameter of the cone-shaped portion 61 gradually increases along the direction from the air inlet end 12 to the air outlet end 13 of the cylinder 1, giving the cone-shaped portion 61 a gradually expanding structure. The cone-shaped portion 61 can guide the airflow flowing out of the air guide duct 200 to smoothly change direction, so that the airflow gradually transitions from axial flow to radial flow, thereby guiding the airflow to diffuse smoothly, decelerate and flow towards the air outlet 31, reducing the possibility of airflow stripping, backflow or vortex formation near the air outlet 31, making the discharged airflow more stable and the noise lower.

[0100] like Figure 8 As shown, the second air guide cone 6 also includes an annular portion 62, which extends radially outward from the edge of the large-diameter end of the cone portion 61 and is used to connect with the cover 3.

[0101] For example, the second air guide cone 6 is detachably connected to the cover 3, for example, by means of threaded fasteners, snap-fit ​​connections, etc. Figure 6 and Figure 8 As shown, the top wall of the cover 3 is provided with a third buckle 33, and the annular part 62 is provided with a snap-fit ​​hole 621 that is adapted to the third buckle 33. The third buckle 33 can be connected with the snap-fit ​​hole 621 to realize the detachable connection between the cover 3 and the second air guide cone 6.

[0102] In some embodiments, the second air guide cone 6 is a rotating body, and the central axis of the first air guide cone 5 coincides with the central axis of the cone-shaped portion 61.

[0103] For example, the surface of the second guide cone 6 used to guide airflow is arc-shaped. For example Figure 3 As shown, in the longitudinal section of the second air guide cone 6, the curvature center of the arcs on both sides of the axis of symmetry is located on the side of the second air guide cone 6 away from the cover 3. The longitudinal section of the second air guide cone 6 is roughly inverted "V" shape, which makes the transition between the edge area of ​​the second air guide cone 6 and the top wall of the cylinder 1 smoother, ensuring that the airflow from the air guide duct 200 can be smoothly converted from axial flow to radial flow, and then flow to the air outlet 31.

[0104] By setting the central axis of the first guide cone 5 to coincide with the central axis of the cone 61, it is ensured that the first guide cone 5 and the second guide cone 6 are coaxially installed in the air duct assembly. The airflow rectified by the first guide cone 5 flows along the central axis of the first guide cone 5 to the second guide cone 6. Under the guidance of the second guide cone 6, it smoothly diffuses from the central area of ​​the second guide cone 6 to the surrounding area, avoiding problems such as flow channel eccentricity, airflow deviation, and asymmetric vortices caused by cone misalignment, which helps to reduce noise and additional wind resistance.

[0105] In some embodiments, such as Figure 3 As shown, the air duct assembly also includes a breathable noise reduction component 7, which is disposed within the space defined by the cover 3 and the air guide 2 and is located downstream of the air guide duct 200.

[0106] For example, the breathable and noise-reducing component 7 can be a breathable material such as filter cotton, fiber cotton felt, or porous foam.

[0107] The breathable noise reduction component 7 allows airflow to pass through while absorbing noise and pollutants such as dust carried in the airflow. This not only improves the noise reduction effect at the downstream end of the air duct component but also prevents pollutants from flowing out of the air duct component.

[0108] In some embodiments, the breathable noise-reducing element 7 is annular, for example... Figure 1 As shown, the breathable and noise-reducing component 7 is in the shape of a ring.

[0109] like Figure 3 As shown, the breathable and noise-reducing component 7 is located within the space enclosed by the mounting portion 22 of the cover 3 and the air guide 2, making full use of the space between the cover 3 and the air guide 2.

[0110] By setting the breathable noise reduction component 7 in a ring shape, not only can the breathable noise reduction component 7 be adapted to the shape of the cover 3, but the hollow structure in the middle of the breathable noise reduction component 7 can also ensure that the airflow is not blocked, thus avoiding the impact on wind resistance. At the same time, it can effectively absorb noise and pollutants such as dust carried in the airflow at the downstream end of the air duct component.

[0111] This application also provides a vacuum cleaner, including the air duct assembly provided in any of the above embodiments.

[0112] The vacuum cleaner provided in this application embodiment includes the air duct assembly provided in any of the above embodiments, and therefore has the beneficial effects of the air duct assembly in any of the above embodiments, which will not be repeated here.

[0113] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0114] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0115] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A duct assembly, characterized in that, The air duct assembly includes: The cylinder (1) is a hollow structure with an air inlet (12) and an air outlet (13). The cylinder (1) is provided with a guide section (11). The guide section (11) extends from the inner wall of the cylinder (1) toward the center of the cylinder (1). The guide section (11) is provided with a guide surface (111) on the side near the air inlet (12). The part of the guide surface (111) that is closer to the inner wall of the cylinder (1) is closer to the air inlet (12). The guide surface (111) and the inner wall of the cylinder (1) enclose each other to form an air inlet duct (100). The air guide (2) is connected to the air guide (11), and the air guide (2) has an air guide duct (200) that communicates with the air inlet duct (100); The cover (3) is connected to the air guide (2) and covers the air outlet (13). The cover (3) has an air outlet (31) that communicates with the air guide duct (200).

2. The air duct assembly according to claim 1, characterized in that, The air guide surface (111) is an arc surface, and the center of curvature of the air guide surface (111) is located on the side of the air guide (2) near the air inlet end (12).

3. The air duct assembly according to claim 1, characterized in that, The cover (3) is detachably connected to the air guide (2).

4. The air duct assembly according to claim 1, characterized in that, The air duct assembly also includes a bracket (4), which is connected to the flow guide (11) and the air guide (2) respectively. The bracket (4) is provided with an air inlet (43), and the air guide duct (200) is connected to the air inlet duct (100) through the air inlet (43). The air guide (2) includes a connected main body (21) and a mounting part (22). The main body (21) is cylindrical and the mounting part (22) is located at one end of the main body (21). The mounting part (22) is arranged around the outer periphery of the main body (21) and protrudes outward relative to the side wall of the main body (21). The end of the main body (21) away from the mounting part (22) is inserted into the bracket (4). The mounting part (22) is located on the side of the bracket (4) near the cover (3).

5. The air duct assembly according to claim 4, characterized in that, One end of the bracket (4) extends from the guide portion (11) into the air inlet duct (100). There are multiple air inlets (43), which are evenly spaced around the central axis of the bracket (4) and located on the side wall of the bracket (4).

6. The air duct assembly according to claim 5, characterized in that, The air duct assembly further includes a first air guide cone (5), which is installed in the bracket (4) and located at one end of the bracket (4) away from the air guide (2). The cross-sectional profile of the first air guide cone (5) gradually decreases along the direction from the air inlet (12) to the air outlet (13). The first air guide cone (5) is used to guide the airflow at the air inlet (43) to the air guide channel.

7. The air duct assembly according to claim 6, characterized in that, The first air guide cone (5) is a rotating body, and the central axis of the first air guide cone (5) coincides with the central axis of the support (4).

8. The air duct assembly according to claim 7, characterized in that, The air outlet (31) is located at least on the side wall of the cover (3); the air duct assembly also includes a second air guide cone (6), which is installed on the cover (3) and is disposed opposite to the first air guide cone (5). The second air guide cone (6) includes a cone-shaped portion (61), the cross-sectional profile of which gradually increases along the direction from the air inlet end (12) to the air outlet end (13). The cone-shaped portion (61) is used to guide the airflow to the air outlet (31).

9. The air duct assembly according to claim 8, characterized in that, The second air guide cone (6) is a rotating body, and the central axis of the first air guide cone (5) coincides with the central axis of the cone-shaped part (61).

10. The air duct assembly according to claim 8, characterized in that, The air duct assembly also includes a breathable noise reduction component (7), which is disposed within the space defined by the cover (3) and the air guide (2) and is located downstream of the air guide duct (200).

11. The air duct assembly according to claim 10, characterized in that, The breathable noise reduction component (7) is ring-shaped.

12. A vacuum cleaner, characterized in that, The vacuum cleaner includes the air duct assembly as described in any one of claims 1 to 11.

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