A noise reduction structure for a vacuum cleaner

Abstract

A noise reduction structure for a vacuum cleaner includes a main unit. The main unit comprises: a main housing with an air inlet and an air outlet; a fan assembly disposed within the main housing, which, when operating, causes airflow to sequentially pass through the air inlet, the interior of the main housing, and the air outlet; and an inner housing disposed within the main housing, located between the fan assembly and the air outlet. The inner housing divides the interior of the main housing into an inner air duct and an outer air duct, causing the airflow entering the main housing to sequentially pass through the inner and outer air ducts and exit through the air outlet. This invention provides a noise reduction structure for a vacuum cleaner that optimizes the air duct structure, reduces noise emitted during use, and improves the user experience.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum cleaners, specifically relating to a noise reduction structure for a vacuum cleaner. Background Technology

[0002] In existing technology, vacuum cleaners use a motor to drive the fan blades to rotate at high speed, creating an air pressure difference between the external environment and the dust collection chamber and generating airflow. Dust is drawn into the dust collection chamber along with the airflow, and after filtration, the dust is temporarily stored in the dust collection chamber, while the air is discharged from the vacuum cleaner's main unit.

[0003] Patent document CN112603191B discloses a handheld vacuum cleaner, comprising: a main housing; a handle connected to or integrally formed with the main housing, the handle having a gripping area for the user to hold; a fan assembly for driving airflow to generate negative pressure, the fan assembly being disposed within the main housing; and a battery pack electrically connected to the fan assembly for providing electrical power for the operation of the fan assembly. The handle has an internal receiving space, at least a portion of the battery pack is disposed within the receiving space, and at least a portion of the battery pack is located within the gripping area. When the handheld vacuum cleaner is in vacuuming mode... In dust-free operating mode, the battery pack outputs a current greater than or equal to 5A; a heat insulation layer is set around the battery pack to limit heat conduction between the battery pack and the grip area; the problem is that the vacuum cleaner with the above structure has a single air duct design. When the fan blades rotate at high speed, they drive the airflow to flow rapidly. After being filtered in the dust cup assembly, the airflow is directly discharged from the side air outlet of the shell. The rapidly flowing airflow can easily form turbulence in the shell and generate noise, causing the vacuum cleaner to make a lot of noise when in use, which affects the user experience.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] The purpose of this utility model is to overcome at least one of the shortcomings of the prior art and provide a noise reduction structure for a vacuum cleaner, which optimizes the air duct structure of the vacuum cleaner, reduces the noise emitted by the vacuum cleaner during use, and improves the user's experience of using the vacuum cleaner.

[0006] To achieve the above objectives, the technical solution provided by this utility model embodiment is as follows:

[0007] A noise reduction structure for a vacuum cleaner includes a main unit, the main unit being equipped with:

[0008] The main housing is provided with an air inlet and an air outlet.

[0009] A fan assembly is disposed inside the main housing. When the fan assembly is running, it causes airflow to pass sequentially through the air inlet, the inside of the main housing, and the air outlet.

[0010] The inner shell is disposed inside the main shell and is located between the fan assembly and the air outlet. The inner shell divides the interior of the main shell into an inner air duct and an outer air duct, so that the airflow entering the interior of the main shell passes through the inner air duct and the outer air duct in sequence and is output from the air outlet.

[0011] The inner shell is a cylindrical shape with both ends through and is arranged around the periphery of the fan assembly. The inner air duct and the outer air duct are interconnected and separated by inner and outer rings. The air inlet is located on the front end of the main shell and is connected to the inner air duct. The air outlet is located on the side wall of the main shell and is connected to the outer air duct.

[0012] The inner shell is provided with airflow holes for airflow to be transported from the inner air duct to the outer air duct. There are several airflow holes arranged at intervals on the rear side wall of the inner shell. The airflow direction of the airflow holes is opposite to the airflow direction of the air outlet.

[0013] When the inner shell is installed inside the main shell, an airflow passage is left between the inner shell and the main shell for airflow to pass through, and the airflow passage is located inside the upper part of the main shell.

[0014] The host is also provided with a fixing component, which is set on the main housing. The inner housing is installed on the main housing through the fixing component and the fan assembly is installed on the main housing through the fixing component.

[0015] The main housing is provided with a fixing rib, which is set on the inner wall surface of the main housing and extends along the center direction of the main housing. When the inner housing is placed on the main housing, the front end of the inner housing abuts against the fixing component and the rear end of the inner housing abuts against the fixing rib, so as to realize the installation of the inner housing inside the main housing.

[0016] A limiting structure is provided between the inner shell and the main shell to limit the inner shell to be installed on the main shell;

[0017] The limiting structure includes a limiting groove on the inner shell and a limiting post on the main shell corresponding to the limiting groove. The limiting groove is located on the rear end of the inner shell, and the limiting post extends horizontally from the inner wall of the main shell towards the center. When the inner shell is installed inside the main shell, the limiting post extends into the limiting groove to restrict the movement of the inner shell on the main shell.

[0018] A fixing structure is provided between the fixing component and the main housing, and the fixing structure is used to limit the fixing component to be installed on the main housing.

[0019] The fixed structure includes an mounting edge and a limiting protrusion disposed on the fixed component, and an mounting annular groove and a limiting hole disposed on the main housing. The mounting edge is arranged around the outer edge of the fixed component, the mounting annular groove is arranged around the inner wall surface of the main housing and corresponds to the mounting edge, the limiting protrusion is located at the top of the mounting edge, and the limiting hole is located at the upper part of the inner wall surface of the main housing and corresponds to the limiting protrusion. When the fixed component is placed on the main housing, the mounting edge extends into the mounting annular groove, and the limiting protrusion extends into the limiting hole, so as to realize the fixed component being fixedly installed on the main housing.

[0020] The fan assembly includes a fan bracket, a motor component, and a wind turbine component. The fan bracket is mounted on a fixed component, the motor component is fixed on the fan bracket and located in the inner cavity of the inner housing, and the wind turbine component is mounted on the output shaft of the motor component and located on the front side of the inner housing.

[0021] The fan bracket and the fixed component are provided with an installation structure. The installation structure enables the fan bracket to be fixed on the fixed component. The installation structure includes an installation groove on the fan bracket and an installation protrusion on the fixed component. There are several installation grooves arranged circumferentially at intervals on the outer edge of the fan bracket. There are several installation protrusions arranged circumferentially at intervals on the outer peripheral wall of the fixed component. When the fan bracket is placed on the fixed component, the installation protrusions are inserted into the installation grooves and the two are interference-fitted to fix the fan bracket on the fixed component.

[0022] The fan support is provided with spiral air ducts, air duct inlets and airflow guides. There are several spiral air ducts arranged evenly at intervals around the back of the fan support. There are several air duct inlets arranged vertically on the front of the fan support and located at the air inlet end of each spiral air duct. There are several airflow guides located at each air duct inlet. The airflow guides are inclined backward from the front to the rear of the fan support and their radial dimension gradually increases from front to back.

[0023] The main housing is also provided with a handle, which extends along the rear side of the main housing. The main unit is also provided with a control board component and an electrical connector component. The control board component and the electrical connector component are both located inside the handle. The control board component is electrically connected to the fan assembly and the electrical connector component, respectively.

[0024] The vacuum cleaner also includes a dust collection component and a battery component. The dust collection component is detachably mounted on the main housing and connected to the air inlet. The battery component is detachably mounted on the handle and electrically coupled to the electrical connector component.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model adopts the noise reduction structure of the above-mentioned technical solution. The fan assembly and the inner shell are set inside the main shell. The inner shell divides the inside of the main shell into an inner air duct and an outer air duct. When the fan assembly is running, it causes the airflow to pass through the air inlet, the inner air duct, and the outer air duct in sequence and be output from the air outlet. This optimizes the air duct structure inside the main shell and reconstructs the airflow path, avoiding the generation of eddies and impacts in the airflow within the air duct, reducing the noise caused by high-speed airflow, reducing the noise emitted by the vacuum cleaner during use, and improving the user's experience of using the vacuum cleaner. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a vacuum cleaner according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the host computer according to an embodiment of the present invention.

[0029] Figure 3 This is a cross-sectional view of the host unit according to an embodiment of the present invention.

[0030] Figure 4 This is an exploded view of the host computer according to an embodiment of the present invention.

[0031] Figure 5 This is an exploded view of the host computer according to an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the inner shell structure of one embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the structure of a fixing component according to an embodiment of the present invention.

[0034] Figure 8 This is an exploded view of a fan assembly according to an embodiment of the present invention.

[0035] Figure 9 This is an exploded view of a fan assembly according to an embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of airflow in the host unit according to an embodiment of the present invention.

[0037] Figure 11 This is a schematic diagram of airflow in the host unit according to an embodiment of the present invention. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0039] See Figure 1-11 The noise reduction structure of this vacuum cleaner includes a main unit 1, which has a main housing 3, a fan assembly 2, and an inner housing 4. In this embodiment, the main housing 3 has an air inlet 302 and an air outlet 303. The fan assembly 2 is detachably installed inside the main housing 3. The inner housing 4 is cylindrical with both ends through it and is arranged around the fan assembly 2, dividing the interior of the main housing 3 into an inner air duct 31 and an outer air duct 32 that are interconnected and separated by inner and outer rings. The inner housing 4 acts as a physical barrier, which can reduce the transmission of motor noise to the outside of the main housing 3 to a certain extent. The air inlet 302 is located on the front end of the main housing 3 and is connected to the inner air duct 31. The air outlet 303... 03 is located on the side wall of the main housing 3 and connects to the external air duct 32 with its air outlet direction facing downward. When the vacuum cleaner is working, the fan assembly 2 runs and promotes airflow. The airflow passes through the air inlet 302, the inner air duct 31, and the outer air duct 32 in sequence and is output to the external environment from the air outlet 303. The inner air duct 31 and the outer air duct 32 form a dual air duct path, which avoids the airflow collision inside the main housing 3, optimizes the air duct structure inside the main housing 3, and reconstructs the airflow path, avoids the airflow generating eddies and impacts in the air duct, reduces the noise caused by high-speed airflow, reduces the noise emitted by the vacuum cleaner during use, and improves the user's experience of using the vacuum cleaner.

[0040] Furthermore, the inner housing 4 is provided with airflow holes 401. Specifically, in this embodiment, the number of airflow holes 401 is preferably ten, arranged in groups of five at intervals on the rear side wall of the inner housing 4. The airflow holes 401 are oriented upwards and opposite to the airflow direction of the air outlet 303. Through the above technical solution, the airflow entering the main housing 3 can flow from the inner ring to the outer ring, which can disperse the airflow pressure inside the main housing 3 and reduce the impact friction between the airflow and the main housing 3, so as to reduce the noise caused by the airflow. This can be understood by those skilled in the art.

[0041] Furthermore, in this embodiment, when the inner shell 4 is installed inside the main shell 3, an airflow passage 301 is left between the inner shell 4 and the main shell 3. Specifically, the airflow passage 301 is located above the inside of the main shell 3. When the airflow enters the inner air duct 31, the airflow can enter the outer air duct 32 through the airflow passage 301, which further disperses the airflow pressure inside the main shell 3 and further reduces the noise caused by the airflow. This is understandable to those skilled in the art.

[0042] Furthermore, the host 1 is also provided with a fixing component 5. Specifically, in this embodiment, the fixing component 5 is annular and is fixedly mounted on the main housing 3 by a fixing structure. The fixing structure includes a mounting edge 501, a limiting protrusion 502, a mounting ring groove 306, and a limiting hole 307. The mounting edge 501 is integrally formed on the fixing component 5 and surrounds the outer edge of the fixing component 5. The limiting protrusion 502 is integrally formed on the fixing component 5 and is located at the top of the mounting edge 501. The mounting ring groove 306 is integrally formed on the main housing 3 and is arranged around the inner wall of the main housing 3 and corresponds to the mounting edge 501. The limiting hole 307 is integrally formed on the main housing 3 and is located at the upper part of the inner wall of the main housing 3 and corresponds to the limiting protrusion 502. The diameter of the groove 306 is slightly larger than the diameter of the mounting edge 501, and the thickness of the mounting ring groove 306 is slightly larger than the height of the mounting edge 501, so that the mounting edge 501 can extend into the mounting ring groove 306. The shape of the limiting protrusion 502 is the same as the shape of the limiting hole 307, and the outer edge dimension of the limiting protrusion 502 is the same as the inner diameter dimension of the limiting hole 307, so that the limiting protrusion 502 can extend into the limiting hole 307. When the fixing component 5 is placed on the main housing 3, the mounting edge 501 extends into the mounting ring groove 306, and the limiting protrusion 502 extends into the limiting hole 307. Through the above technical solutions, the fixing component 5 is limited and installed inside the main housing 3, which can be understood by those skilled in the art.

[0043] Furthermore, the inner shell 4 is installed on the main shell 3 in cooperation with the main shell 3 through the fixing component 5. Specifically, the main shell 3 is provided with fixing ribs 304. In this embodiment, the fixing ribs 304 are integrally formed on the inner wall surface of the main shell 3 and extend along the center direction of the main shell 3. The number of ribs is preferably six, and three are arranged in a group and respectively on the left and right inner walls of the main shell 3. The three fixing ribs 304 are arranged at intervals along the height direction of the main shell 3. When the inner shell 4 is placed on the main shell 3, the front end of the inner shell 4 abuts against the fixing component 5, and the rear end of the inner shell 4 abuts against the fixing ribs 304. Through the above technical solution, the inner shell 4 is installed inside the main shell 3, which can be understood by those skilled in the art.

[0044] Furthermore, a limiting structure is provided between the inner shell 4 and the main shell 3. Specifically, in this embodiment, the limiting structure includes a limiting groove 402 and a limiting post 305. The limiting groove 402 is disposed on the inner shell 4 and located on the rear end of the inner shell 4. Preferably, there are two of them, arranged in a left-right direction. The limiting post 305 is disposed on the main shell 3 and extends horizontally from the inner wall of the main shell 3 towards the center. Preferably, there are two of them, which are disposed corresponding to the limiting groove 402. When the inner shell 4 is installed inside the main shell 3, the limiting post 305 extends into the limiting groove 402 to restrict the movement of the inner shell 4 on the main shell 3. Through the above technical solution, the inner shell 4 is limited and installed on the main shell 3, which can be understood by those skilled in the art.

[0045] Furthermore, the fan assembly 2 includes a fan bracket 21, a motor component 22, and a fan wheel component 23. Specifically, in this embodiment, the fan bracket 21 is mounted on the fixing component 5 via a fixing structure. The mounting structure includes mounting grooves 211 and mounting protrusions 503. The mounting grooves 211 are disposed on the fan bracket 21, preferably three in number and evenly spaced around the outer edge of the fan bracket 21. The mounting protrusions 503 are disposed on the fixing component 5, preferably twelve in number and evenly spaced around the outer edge of the fan bracket 21. When the fan bracket 21 is inserted into the fixing component 5 from front to back... When fixing component 5, mounting protrusion 503 is inserted into mounting groove 211 and the two are interference fit with each other to fix the fan bracket 21 on the fixing component 5. The motor component 22 is preferably a high-speed motor and is installed on the fan bracket 21 by fastening structure such as screw and nut structure and is located in the inner cavity of inner housing 4 to fix the motor component 22 on the fan bracket 21 and provide huge suction for the vacuum cleaner. The impeller component 23 is preferably a vortex fan blade and is inserted into the output shaft of the motor component 22 to fix the impeller component 23 on the output shaft of the motor component 22. This can be understood by those skilled in the art.

[0046] Furthermore, in this embodiment, the fan support 21 is provided with spiral air ducts 212, air duct inlets 213, and airflow guides 214. Specifically, the number of spiral air ducts 212 is preferably eight, arranged circumferentially at uniform intervals on the back of the fan support 21. The number of air duct inlets 213 is eight, arranged vertically on the front of the fan support 21 and respectively located at the air inlet end of the eight spiral air ducts 212, so that the airflow enters the impeller tangentially, reducing axial disturbance and ensuring the working stability of the fan assembly 2. The airflow guide... Eight airflow guides 214 are provided at eight air duct inlets 213. The airflow guides 214 are inclined backward from the front side to the rear side of the fan support 21. The inclined design of the airflow guides 214 is preferably 30°, which can improve the airflow velocity at the air duct inlet 213 to a certain extent. The radial dimension of the airflow guides 214 gradually increases from front to back, which optimizes the airflow diffusion angle entering the air duct inlet 213 and avoids the generation of vortex phenomenon when the airflow enters the fan support 21. This is understandable to those skilled in the art.

[0047] Furthermore, the main housing 3 is also provided with a handle 33, and the main unit 1 is also provided with a control board component 6 and an electrical connector component 7. Specifically, in this embodiment, the handle 33 is integrally formed on the main housing 3 and extends along the rear side of the main housing 3. The control board component 6 is preferably a control board and is installed inside the handle 33, so that the control board component 6 is isolated from the fan assembly 2, reducing the electromagnetic interference to the control board component 6 and improving the stability of the use of the control board component 6. The electrical connector component 7 is installed inside the handle 33 and its power connection end is exposed on the outside of the handle 33 to realize the external power supply of the main unit 1. The control board component 6 is electrically connected to the fan assembly 2 and the electrical connector component 7 respectively through wires, which can be understood by those skilled in the art.

[0048] Furthermore, the vacuum cleaner also includes a dust collection assembly 8 and a battery component 9. Specifically, in this embodiment, the dust collection assembly 8 includes a dust collection container and a dust collection pipe that can be combined or separated from each other. The dust collection container is used to collect dust, and the dust collection pipe is installed at the air inlet end of the dust collection container. The dust collection container can be detachably installed on the main housing 3 through a first disassembly structure. The air outlet end of the dust collection container is connected to the air inlet 302, so that the dust collection assembly 8 can be independently installed on the main unit 1 or removed from the main unit 1, which facilitates the replacement and cleaning of the dust collection assembly 8 and improves the user experience of the vacuum cleaner. The first disassembly structure is preferably a snap-on and slot disassembly structure, which enables the dust collection assembly 8 to be quickly installed on the main housing 3 or... The battery component 9 can be quickly disassembled from the main housing 3, improving the replacement efficiency of the dust collection component 8. The battery component 9 is detachably mounted on the handle 33 and electrically coupled to the electrical connector component 7 through the second disassembly structure, allowing the battery component 9 to be independently installed on or removed from the main unit 1. The vacuum cleaner can replace the battery component 9 at any time without the need for an external power cord, expanding the usage scenarios of the vacuum cleaner and further improving the user experience. The second disassembly structure is preferably a slide rail and groove disassembly structure, which enables the battery component 9 to be quickly installed on or quickly removed from the main housing 3, improving the replacement efficiency of the dust collection component 8, as will be understood by those skilled in the art.

[0049] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure for a vacuum cleaner, comprising a main unit (1), characterized in that, The host (1) is equipped with: The main housing (3) is provided with an air inlet (302) and an air outlet (303). The fan assembly (2) is located inside the main housing (3). When the fan assembly (2) is running, it causes the airflow to pass through the air inlet (302), the inside of the main housing (3) and the air outlet (303) in sequence. The inner shell (4) is located inside the main shell (3) and between the fan assembly (2) and the air outlet (303). The inner shell (4) divides the interior of the main shell (3) into an inner air duct (31) and an outer air duct (32), so that the airflow entering the interior of the main shell (3) passes through the inner air duct (31) and the outer air duct (32) in sequence and is output from the air outlet (303).

2. The noise reduction structure of the vacuum cleaner according to claim 1, characterized in that, The inner shell (4) is a cylindrical shape with both ends through and is arranged around the periphery of the fan assembly (2). The inner air duct (31) and the outer air duct (32) are connected to each other and are separated by inner and outer rings. The air inlet (302) is located on the front end of the main shell (3) and is connected to the inner air duct (31). The air outlet (303) is located on the side wall of the main shell (3) and is connected to the outer air duct (32).

3. The noise reduction structure of the vacuum cleaner according to claim 2, characterized in that, The inner shell (4) is provided with airflow holes (401) for airflow to be transported from the inner air duct (31) to the outer air duct (32). There are several airflow holes (401) arranged at intervals on the rear side wall of the inner shell (4). The airflow direction of the airflow holes (401) is opposite to the airflow direction of the air outlet (303). When the inner shell (4) is installed inside the main shell (3), an airflow passage (301) is left between the inner shell (4) and the main shell (3) for airflow to pass through. The airflow passage (301) is located above the inside of the main shell (3).

4. The noise reduction structure of the vacuum cleaner according to claim 2, characterized in that, The host (1) is also provided with a fixing component (5), which is set on the main housing (3). The inner housing (4) is installed on the main housing (3) through the fixing component (5) and the main housing (3). The fan assembly (2) is installed on the main housing (3) through the fixing component (5).

5. The noise reduction structure of the vacuum cleaner according to claim 4, characterized in that, The main housing (3) is provided with a fixing rib (304). The fixing rib (304) is set on the inner wall surface of the main housing (3) and extends along the center direction of the main housing (3). When the inner housing (4) is placed on the main housing (3), the front end of the inner housing (4) abuts against the fixing component (5), and the rear end of the inner housing (4) abuts against the fixing rib (304) so ​​as to realize that the inner housing (4) is installed inside the main housing (3).

6. The noise reduction structure of the vacuum cleaner according to claim 4, characterized in that, A limiting structure is provided between the inner shell (4) and the main shell (3) to limit the inner shell (4) to be installed on the main shell (3); The limiting structure includes a limiting groove (402) disposed on the inner shell (4) and a limiting post (305) disposed on the main shell (3) and corresponding to the limiting groove (402). The limiting groove (402) is located on the rear end of the inner shell (4), and the limiting post (305) extends horizontally from the inner wall of the main shell (3) towards the center. When the inner shell (4) is installed inside the main shell (3), the limiting post (305) extends into the limiting groove (402) to restrict the movement of the inner shell (4) on the main shell (3).

7. The noise reduction structure of the vacuum cleaner according to claim 4, characterized in that, A fixing structure is provided between the fixing component (5) and the main housing (3), and the fixing component (5) is fixedly installed on the main housing (3) through the fixing structure; The fixed structure includes an mounting edge (501) and a limiting protrusion (502) disposed on the fixed component (5), and an mounting ring groove (306) and a limiting hole (307) disposed on the main housing (3). The mounting edge (501) is wrapped around the outer edge of the fixed component (5), the mounting ring groove (306) is wrapped around the inner wall surface of the main housing (3) and corresponds to the mounting edge (501), the limiting protrusion (502) is located at the top of the mounting edge (501), and the limiting hole (307) is located at the upper part of the inner wall surface of the main housing (3) and corresponds to the limiting protrusion (502). When the fixed component (5) is placed on the main housing (3), the mounting edge (501) extends into the mounting ring groove (306), and the limiting protrusion (502) extends into the limiting hole (307) to realize the fixed component (5) being limited and installed on the main housing (3).

8. The noise reduction structure of the vacuum cleaner according to claim 4, characterized in that, The fan assembly (2) includes a fan bracket (21), a motor component (22) and a wind turbine component (23). The fan bracket (21) is mounted on a fixed component (5). The motor component (22) is fixed on the fan bracket (21) and located in the inner cavity of the inner housing (4). The wind turbine component (23) is mounted on the output shaft of the motor component (22). The fan bracket (21) and the fixing component (5) are provided with an installation structure. The fan bracket (21) is fixed on the fixing component (5) through the installation structure. The installation structure includes an installation groove (211) on the fan bracket (21) and an installation protrusion (503) on the fixing component (5). The installation groove (211) consists of several grooves arranged circumferentially at intervals on the outer edge of the fan bracket (21). The installation protrusion (503) consists of several grooves arranged circumferentially at intervals on the outer peripheral wall of the fixing component (5). When the fan bracket (21) is placed on the fixing component (5), the installation protrusion (503) is inserted into the installation groove (211) and the two are interference-fitted to achieve the fan bracket (21) being fixed on the fixing component (5).

9. The noise reduction structure of the vacuum cleaner according to claim 8, characterized in that, The fan support (21) is provided with a spiral air duct (212), an air duct inlet (213) and an airflow guide (214). The spiral air duct (212) consists of several spiral air ducts arranged evenly in the circumferential direction on the back of the fan support (21). The air duct inlet (213) consists of several air ducts arranged vertically on the front of the fan support (21) and located at the air inlet end of each spiral air duct (212). The airflow guide (214) consists of several air ducts located at each air duct inlet (213). The airflow guide (214) is inclined backward from the front side to the rear side of the fan support (21) and its radial dimension gradually increases from front to back.

10. The noise reduction structure of the vacuum cleaner according to any one of claims 2-9, characterized in that, The main housing (3) is also provided with a handle (33), which extends along the rear side of the main housing (3). The main unit (1) is also provided with a control board component (6) and an electrical connector component (7). The control board component (6) and the electrical connector component (7) are both located inside the handle (33). The control board component (6) is electrically connected to the fan assembly (2) and the electrical connector component (7) respectively. The vacuum cleaner also includes a dust collection component (8) and a battery component (9). The dust collection component (8) is detachably mounted on the main housing (3) and connected to the air inlet (302). The battery component (9) is detachably mounted on the handle (33) and electrically coupled to the electrical connector component (7).

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