Dust collector

Abstract

A dust collector is provided with a motor (10) and an impeller which can be driven by the motor (10) to rotate to generate suction airflow, the dust collector is further provided with an exhaust air duct (2), a ventilated air window wall (30), a ventilated first noise reduction piece (12) and a ventilated second noise reduction piece (13), an air duct air outlet (20) is formed in the tail end of the exhaust air duct (2) so that the exhaust air duct (2) can exhaust air, and the air window wall (30) is located on the downstream portion of the air duct air outlet (20). The first noise reduction part (12) blocks the air exhaust duct (2), the second noise reduction part (13) shields the inner side of the air window wall (30), and airflow exhausted by the impeller flows through the air exhaust duct (2) and sequentially penetrates through the first noise reduction part (12), the second noise reduction part (13) and the air window wall (30) so as to effectively reduce noise.

Description

[0001] This application claims priority to Chinese Patent Application No. 202111672536.4, filed with the Chinese Patent Office on December 31, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a vacuum cleaner, such as noise reduction for a vacuum cleaner. Background Technology

[0003] Vacuum cleaners are common garbage disposal devices. A common pain point for vacuum cleaner users is their loud operating noise. When using a vacuum cleaner to suck up garbage for a long time, the noise can be quite uncomfortable for both the user and their physical and mental health. In related technologies, vacuum cleaners usually have some sound-absorbing and noise-reducing materials (such as sponges used for sound absorption and noise reduction), but the layout is often poor and the noise reduction effect is not ideal. Summary of the Invention

[0004] This application provides a vacuum cleaner that has a good noise reduction effect on the airflow discharged from the impeller.

[0005] A vacuum cleaner includes a motor, an impeller that rotates under the drive of the motor to generate suction airflow, an exhaust duct, a ventilated window wall, a breathable first noise reduction component, and a breathable second noise reduction component. The exhaust duct has an air outlet at its end for exhausting air. The window wall is located downstream of the air outlet. The first noise reduction component blocks the exhaust duct, and the second noise reduction component shields the inside of the window wall. The airflow discharged by the impeller flows through the exhaust duct and passes sequentially through the first noise reduction component, the second noise reduction component, and the window wall.

[0006] Optionally, the vacuum cleaner also includes an expansion chamber located downstream of the air outlet of the air duct, with a second noise reduction component located inside the expansion chamber. The airflow output from the air outlet of the air duct enters the expansion chamber and passes through the second noise reduction component and the air window wall in sequence before exiting the expansion chamber. The airflow output from the air outlet of the air duct diffuses within the expansion chamber, and the air outlet of the air duct constitutes the air inlet of the expansion chamber.

[0007] Optionally, the air vent wall is exposed on the outside of the vacuum cleaner. The air vent wall connects the outside of the vacuum cleaner with the expansion chamber. The air vent wall is provided with a first air vent, a second air vent, and an airtight baffle connecting the first air vent and the second air vent. The first air vent is located on the side of the airtight baffle closer to the air outlet of the air duct, and the second air vent is located on the side of the airtight baffle away from the air outlet of the air duct. A second noise reduction component is attached to the inner side of the first air vent, the inner side of the second air vent, and the inner side of the airtight baffle. The second noise reduction component completely blocks the first air vent and the second air vent. The airflow that enters the expansion chamber from the air outlet of the air duct is discharged from the expansion chamber through the first air vent and the second air vent.

[0008] Optionally, the vacuum cleaner also includes a handle and an outer casing. The handle is located outside the outer casing and connected to the outer casing. The air vent wall is located on the outer casing. The outer casing extends downward and is provided with at least one first positioning part. The at least one first positioning part and the air vent wall clamp a second noise reduction component. The at least one first positioning part is located in the expansion chamber.

[0009] Optionally, the exhaust duct includes an inner duct, an outer duct connected to the inner duct, and a partition wall. The inner duct is annular around the axis of the motor shaft, and the impeller can rotate under the drive of the motor shaft. The outer duct is located outside the inner duct and downstream of the inner duct. One end of the outer duct forms the duct outlet, and the other end of the outer duct is directly connected to the inner duct. The partition wall is shared by the inner and outer ducts and is used to separate the inner and outer ducts.

[0010] Optionally, one end of the external air duct constitutes the end of the exhaust air duct, and the first noise reduction component blocks one end of the external air duct to block the exhaust air duct.

[0011] Optionally, the partition wall is airtight to prevent the airflow of the inner air duct from entering the outer air duct through the partition wall. The airflow delivered by the exhaust air duct is discharged from the exhaust air duct through the air outlet and passes through the first noise reduction component.

[0012] Optionally, the partition wall is arc-shaped, and the external air duct is arc-shaped; the first noise reduction component blocks the external air duct.

[0013] Optionally, the exhaust duct forms a spiral duct, and the vacuum cleaner further includes a spiral sidewall for forming the spiral duct. The spiral sidewall is provided with a circumferential wall for forming an inner duct and an outer wall connecting the circumferential wall. The circumferential wall is a non-closed ring. The partition wall is part of the circumferential wall. The partition wall and the outer wall are also used to form an outer duct. One end of the partition wall is a free end and forms one end of the circumferential wall. The opposite end of the circumferential wall is connected to one end of the outer wall and forms the air outlet of the inner duct between the partition wall and the free end of the partition wall. The air outlet of the inner duct forms the air inlet of the outer duct. The opposite end of the outer wall and the opposite end of the partition wall form the air outlet of the outer duct. The air outlet of the outer duct forms the air outlet of the duct.

[0014] Optionally, the partition wall, external wall, and external air duct are arc-shaped, with the circumferential wall surrounding the outer perimeter of the motor shaft axis.

[0015] Optionally, the vacuum cleaner also includes a lower cover and an exhaust hood. The exhaust hood is located on the upper side of the lower cover, and an exhaust duct is formed between the exhaust hood and the lower cover. The spiral sidewall is part of the exhaust hood. The vacuum cleaner also includes an impeller housing and a third noise reduction component. The impeller is located inside the impeller housing, which is located between the exhaust hood and the lower cover. The impeller housing has multiple exhaust ports in the circumferential direction. The airflow discharged from the impeller enters the inner duct through the multiple exhaust ports. The third noise reduction component is located inside the inner duct and is fitted around the outer periphery of the impeller housing to cover the multiple exhaust ports. The exhaust hood has multiple first extensions located inside the inner duct and above the third noise reduction component. The first extensions extend downward and abut against the third noise reduction component.

[0016] Optionally, the internal air duct includes an upper annular portion and a lower annular portion. The upper annular portion is formed in the exhaust hood, and the lower annular portion surrounds the impeller casing. The third noise reduction component is located inside the lower annular portion. The lower annular portion is directly connected to the plurality of exhaust ports. The airflow discharged from the impeller enters the lower annular portion through the plurality of exhaust ports and flows upward into the upper annular portion. The plurality of first extension portions are at least partially housed in the upper annular portion.

[0017] Optionally, the vacuum cleaner also includes a dust collection container, with a lower cover covering the upper end of the dust collection container. The motor is in a vertical position on the upper side of the lower cover. The exhaust hood is also provided with a middle cylinder wall, which surrounds the periphery of the motor and forms the inner peripheral wall of the upper annular portion. The plurality of first extension portions are distributed on the periphery of the middle cylinder wall, and the plurality of first extension portions extend downward from the top side of the upper annular portion.

[0018] Optionally, the vacuum cleaner also includes an outer casing, which is located on the upper side of the lower cover and covers the exhaust fan hood. A vent wall is located on the outer casing, and the lower edge of the vent wall is attached to the lower cover. The lower cover has a suction port, a bottom plate, and an annular wall for forming a lower annular portion. The suction airflow flows through the suction port, which passes through the upper and lower sides of the bottom plate. The bottom plate forms the bottom wall of the lower annular portion. An impeller cover is located between the lower end of the middle cylinder wall and the bottom plate. The plurality of first extensions and the bottom plate clamp the third noise reduction component. The annular wall extends upward from the periphery of the bottom plate, and the circumferential wall and the annular wall are joined vertically. The circumferential wall forms the outer circumferential wall of the upper annular portion, and the annular wall forms the outer circumferential wall of the lower annular portion.

[0019] Optionally, the vacuum cleaner also includes an expansion chamber and a distal wall located downstream of the air outlet of the air duct. A second noise reduction component is located inside the expansion chamber. The airflow output from the air outlet of the air duct is discharged into the expansion chamber. The distal wall, the expansion chamber, and the air outlet of the air duct are located on the periphery of the circumferential wall. The spiral air duct surrounds the periphery of the motor shaft axis. The air window wall forms the outer wall of the expansion chamber relative to the outside of the vacuum cleaner. A part of the circumferential wall is opposite to the air window wall in the radial direction of the motor shaft. The distal wall is opposite to the air outlet of the air duct in the circumferential direction surrounding the inner air duct. The distal wall connects the circumferential wall and the air window wall. The distal wall forms a side wall of the expansion chamber and is located at the end of the expansion chamber away from the air outlet of the air duct.

[0020] Optionally, the vacuum cleaner also includes a lower cover and an exhaust hood. The exhaust hood is located on the upper side of the lower cover, and an exhaust duct is formed between the exhaust hood and the lower cover. The distal wall and the spiral sidewall are part of the exhaust hood. The exhaust hood also includes a top plate and a spiral top wall for forming a spiral duct. The spiral sidewall and the spiral top wall are integrally connected. The distal wall is part of the exhaust hood. The top plate covers the top side of the expansion chamber. The top plate and the top edge of the distal wall are integrally connected. The first noise reduction component is disposed at the air outlet of the duct. The bottom surface A of the spiral top wall adjacent to the air outlet of the duct is lower than the bottom surface B of the top plate adjacent to the air outlet of the duct. A baffle is connected between the bottom surface A and the bottom surface B. The baffle blocks the side of the first noise reduction component facing the exhaust duct to prevent the first noise reduction component from entering the spiral duct. The top of the first noise reduction component is higher than the bottom surface A and abuts against the bottom surface B.

[0021] Optionally, the vacuum cleaner further includes at least one second positioning part, which extends integrally downward from the top plate. The at least one second positioning part blocks the side of the first noise reduction component facing away from the external air duct to prevent the first noise reduction component from dislodging from the air outlet of the air duct under the impact of the airflow in the exhaust air duct. The spiral top wall is in a spiral upward state, and the end of the spiral top wall adjacent to the air outlet of the air duct is higher than the opposite end of the spiral top wall. The opposite end of the spiral top wall is integrally connected to the free end of the partition wall.

[0022] Optionally, the first noise reduction component is located at the air outlet of the air duct, with the air outlet facing the window wall.

[0023] Optionally, the vacuum cleaner further includes at least one second positioning part, and the first noise reduction component is disposed at a predetermined position in the exhaust duct. The at least one second positioning part blocks one side of the first noise reduction component to prevent the first noise reduction component from dislodging from the predetermined position under the impact of the airflow in the exhaust duct.

[0024] Optionally, the predetermined position is the air outlet of the air duct, and the at least one second positioning part blocks the downstream side of the first noise reduction component.

[0025] Optionally, the at least one second positioning portion is an extension column arranged at intervals.

[0026] Optionally, the pore density of the first noise reduction component is less than that of the second noise reduction component.

[0027] Optionally, the vacuum cleaner also includes an air inlet window, an air outlet window, a fourth noise reduction component for ventilation corresponding to the air inlet window, and a fifth noise reduction component for ventilation corresponding to the air outlet window. The cooling airflow for the motor enters the vacuum cleaner through the air inlet window and exits the vacuum cleaner through the air outlet window. The cooling airflow passes sequentially through the air inlet window, the fourth noise reduction component, the inside of the motor, the fifth noise reduction component, and the air outlet window. The motor is equipped with a cooling fan, which rotates to drive airflow to form the cooling airflow.

[0028] Optionally, the vacuum cleaner also includes a dust collection container, an outer casing, a lower cover, a first latch, a second latch, and a handle. The handle is connected to the outer casing, and the lower cover covers the upper part of the dust collection container. The dust collection container and the lower cover are detachably assembled together via the first and second latches. The first latch is fastened to one edge of the lower cover, and the second latch is fastened to the opposite edge of the lower cover. The outer casing is installed on the upper side of the lower cover. The air inlet and air outlet are located on the left and right sides of the outer casing, and the air outlet walls are located on the outer casing. The front or rear side of the cover; the outer cover is also provided with a first recess and a second recess, the first recess and the second recess are located on the left and right sides of the outer cover, the first buckle is at least partially received in the first recess, the second buckle is at least partially received in the second recess, the air inlet is located in the first recess, the air outlet is located in the second recess, the fourth noise reduction component is located on the side of the air inlet facing away from the first buckle, and the fifth noise reduction component is located on the side of the air outlet facing away from the second buckle.

[0029] Optionally, the outer shell has a first raised portion and a second raised portion located on the left and right sides of the outer shell. The first raised portion is located on the side of the outer shell corresponding to the first buckle, and the second raised portion is located on the side of the outer shell corresponding to the second buckle. The first recessed portion is recessed in the first raised portion, and the second recessed portion is recessed in the second raised portion. The fourth noise reduction component is located in the first raised portion, and the fifth noise reduction component is located in the second raised portion.

[0030] Optionally, the first raised portion has a first outer side wall and a second outer side wall located on the front and rear sides of the first raised portion, and a first top side wall located at the top of the first raised portion. The fourth noise reduction component is located between the first outer side wall and the second outer side wall. The fourth noise reduction component is plate-shaped facing the air inlet window. The front side of the fourth noise reduction component is attached to the first outer side wall, the rear side of the fourth noise reduction component is attached to the second outer side wall, the upper side of the fourth noise reduction component is attached to the first top side wall, and the bottom side of the fourth noise reduction component is attached to the lower cover. The second raised portion has a third outer side wall and a second outer side wall located on the front and rear sides of the second raised portion. The fourth outer wall, the second top side wall located at the top of the second raised part, the fifth noise reduction component located between the third outer wall and the fourth outer wall, the fifth noise reduction component is plate-shaped facing the air outlet, the front side of the fifth noise reduction component is attached to the third outer wall, the rear side of the fifth noise reduction component is attached to the fourth outer wall, the upper side of the fifth noise reduction component is attached to the second top side wall, the bottom side of the fifth noise reduction component is attached to the lower cover, the lower end of the first outer wall, the lower end of the second outer wall, the lower end of the third outer wall, the lower end of the fourth outer wall, the lower end of the air inlet window, and the lower end of the air outlet window are respectively connected to the lower cover.

[0031] Optionally, the first raised portion is further provided with a first top sidewall located at the top of the first raised portion, and the second raised portion is further provided with a second top sidewall located at the top of the first raised portion. The fourth noise reduction component is located on the lower side of the first top sidewall, and the fifth noise reduction component is located on the lower side of the second top sidewall. The outer casing is provided with at least one third positioning portion for fixing the fourth noise reduction component and at least one fourth positioning portion for fixing the fifth noise reduction component. The at least one third positioning portion is located inside the first raised portion and extends integrally downward from the first top sidewall, and the at least one fourth positioning portion is located inside the second raised portion and extends integrally downward from the second top sidewall.

[0032] Optionally, the fourth noise reduction component is plate-shaped and shields the inside of the air inlet window, and the fifth noise reduction component is plate-shaped and shields the inside of the air outlet window; the outer casing is provided with at least one third positioning part for fixing the fourth noise reduction component and at least one fourth positioning part for fixing the fifth noise reduction component, the at least one third positioning part clamps the fourth noise reduction component with the air inlet window, and the at least one fourth positioning part clamps the fifth noise reduction component with the air outlet window.

[0033] Optionally, the air inlet window is provided with a plurality of first grid plates arranged in parallel, the plurality of first grid plates being located on the side of the air inlet window opposite to the first latch, the air outlet window is provided with a plurality of second grid plates arranged in parallel, the plurality of second grid plates being located on the side of the air outlet window opposite to the second latch, the at least one third positioning part clamps a fourth noise reduction component with the plurality of first grid plates, and the at least one fourth positioning part clamps a fifth noise reduction component with the plurality of second grid plates.

[0034] Optionally, the vacuum cleaner also includes a heat dissipation duct. The motor is provided with a heat dissipation air inlet and a heat dissipation air outlet. The heat dissipation airflow enters the motor from the heat dissipation air inlet and exits the motor from the heat dissipation air outlet into the heat dissipation duct. One end of the heat dissipation duct is provided with an air outlet. The air outlet window is located downstream of the air outlet of the heat dissipation duct. The heat dissipation duct is fluidly connected between the heat dissipation air outlet of the motor and the interior of the second raised portion.

[0035] Optionally, the air outlet and air window of the heat dissipation duct are located on the left and right sides of the second raised portion, the air outlet of the heat dissipation duct faces the air window, and the air outlet of the heat dissipation duct is directly connected to the interior of the second raised portion.

[0036] Optionally, the vacuum cleaner also includes a heat dissipation shroud and a sealing gasket for forming a heat dissipation duct. The air outlet of the heat dissipation duct is located at the end of the heat dissipation shroud that is relatively close to the air outlet window. The heat dissipation shroud has a collar portion. The sealing gasket is fitted onto the upper end of the motor and seals between the upper periphery of the motor and the collar portion to isolate the heat dissipation air inlet of the motor from the heat dissipation duct.

[0037] Optionally, the heat dissipation outlet of the motor is located on the bottom side of the motor, and the heat dissipation duct includes an annular portion surrounding the motor and an outlet portion located downstream of the annular portion. Relative to the air outlet window, the outlet of the heat dissipation duct is located at the end of the outlet portion that is relatively closer to the air outlet window; relative to the annular portion, the outlet of the heat dissipation duct is located at the end of the outlet portion that is relatively farther away from the annular portion.

[0038] Optionally, the first recessed portion forms a first groove, and the second recessed portion forms a second groove. The first groove is located on the side of the air inlet window facing the first latch, and the second groove is located on the side of the air outlet window facing the second latch. The first latch is at least partially received in the first groove, and the second latch is at least partially received in the second groove. The air inlet window directly connects the interior of the first raised portion with the first groove, and the air outlet window directly connects the interior of the second raised portion with the second groove. The cooling airflow sequentially enters the first raised portion through the first groove and the air inlet window, passes through the fourth noise reduction component in the first raised portion, and flows downward from the cooling air inlet into the interior of the motor and out of the motor from the cooling air outlet on the bottom side of the motor. After flowing out of the cooling air outlet, the cooling airflow enters the annular portion of the cooling duct. The cooling airflow flows upward to the upper part of the annular portion and merges into the outlet portion of the cooling duct. It then exits the cooling duct from the air outlet and enters the second raised portion. The cooling airflow passes through the fifth noise reduction component in the second raised portion and exits through the air outlet window.

[0039] Optionally, the first recessed portion forms a first groove, and the second recessed portion forms a second groove. The first groove is located on the side of the air inlet window facing the first latch, and the second groove is located on the side of the air outlet window facing the second latch. The first latch is at least partially received in the first groove, and the second latch is at least partially received in the second groove. The air inlet window directly connects the interior of the first raised portion with the first groove, and the air outlet window directly connects the interior of the second raised portion with the second groove. The heat dissipation airflow sequentially enters the first raised portion through the first groove and the air inlet window and passes through the fourth noise reduction component inside the first raised portion.

[0040] In this application, the airflow discharged from the impeller flows along the exhaust duct, and the noise reduction of the airflow in the duct is achieved by passing through the first noise reduction component that blocks the exhaust duct. The airflow is further reduced by passing through the second noise reduction component that shields the inside of the windshield wall before it is discharged from the windshield, thus achieving a better noise reduction effect. Attached Figure Description

[0041] Figure 1 This is a perspective view of the vacuum cleaner in this patent application;

[0042] Figure 2 This is a vertical sectional view of the vacuum cleaner in this patent application (dust collection container, wheels, etc. are not shown);

[0043] Figure 3 This is a horizontal sectional view (top view, dust collection container, wheels, and accessory bag assembly not shown) of the vacuum cleaner in this patent application;

[0044] Figure 4 Another horizontal sectional view (from below) of the vacuum cleaner in this patent application;

[0045] Figure 5 This is a partially exploded view of the vacuum cleaner in this patent application;

[0046] Figure 6 This is an exploded view of another part of the vacuum cleaner in this patent application;

[0047] Figure 7 This is a perspective view of the vacuum cleaner in the combined state of its lower cover and exhaust fan hood, as per the patent application.

[0048] Figure 8 This is a perspective view of the vacuum cleaner exhaust hood in this patent application;

[0049] Figure 9 This is another vertical sectional view of the vacuum cleaner in this patent application (dust collection container, wheels, etc. are not shown);

[0050] Figure 10 This is a view of the dust collection container of the vacuum cleaner in this patent application in the state of being separated from the first and second latches;

[0051] Figure 11 This is a perspective view of the motor of the vacuum cleaner of this patent application. Detailed implementation manners

[0052] Refer Figures 1 to 11 As shown, a vacuum cleaner is disclosed, which is provided with a motor 10 and an impeller that can rotate under the drive of the motor 10 to generate a suction airflow. The impeller generates a suction airflow so that the vacuum cleaner can suck garbage; the vacuum cleaner further includes an exhaust air duct 2, a ventilated air window wall 30, a breathable first noise reduction member 12, and a breathable second noise reduction member 13. The end of the exhaust air duct 2 is provided with an air duct air outlet 20 for the exhaust air duct 2 to exhaust air. The air window wall 30 is located downstream of the air duct air outlet 20. The first noise reduction member 12 blocks the exhaust air duct 2, and the second noise reduction member 13 is shielded inside the air window wall 30. The airflow discharged by the impeller flows through the exhaust air duct 2 and sequentially passes through the first noise reduction member 12, the second noise reduction member 13, and the air window wall 30. With such a design, when the airflow discharged by the impeller flows along the exhaust air duct 2, it is preliminarily sound-absorbed and noise-reduced based on passing through the first noise reduction member 12 blocking the exhaust air duct 2, and further sound-absorbed and noise-reduced by passing through the second noise reduction member 13 shielded inside the air window wall 30, and the sound-absorbing and noise-reducing effect is good.

[0053] The vacuum cleaner further includes an expansion chamber 6 located downstream of the air duct air outlet 20. The second noise reduction member 13 is located inside the expansion chamber 6. The airflow output from the air duct air outlet 20 is discharged into the expansion chamber 6 and sequentially passes through the second noise reduction member 13 and the air window wall 30 to be discharged from the expansion chamber 6; the air duct air outlet 20 forms the air inlet of the expansion chamber 6, and the airflow output from the air duct air outlet 20 spreads in the expansion chamber 6. As the name implies, the expansion chamber 6 is spatially expanded or enlarged relative to the air duct air outlet 20, so that the air discharged from the exhaust air duct 2 can spread in the expansion chamber 6, thus reducing the noise of the airflow. The air window wall 30 forms the outer wall of the expansion chamber 6 relative to the outside of the vacuum cleaner, and the air in the expansion chamber 6 passes through the air window wall 30 and thus flows to the outside of the vacuum cleaner.

[0054] The air vent wall 30 is exposed on the outside of the vacuum cleaner and connects the outside of the vacuum cleaner with the expansion chamber 6. The air vent wall 30 is provided with a first air vent 300, a second air vent 301, and an airtight baffle 302 connecting the first air vent 300 and the second air vent 301. The first air vent 300 is located on the side of the airtight baffle 302 near the air outlet 20 of the air duct, and the second air vent 301 is located on the side of the airtight baffle 302 away from the air outlet 20 of the air duct. The second noise reduction component 13 is attached to the inner side of the first air vent 300, the inner side of the second air vent 301, and the inner side of the airtight baffle 302. The second noise reduction component 13 completely blocks the first air vent 300 and the second air vent 301. The airflow that enters the expansion chamber 6 from the air outlet 20 of the air duct is discharged from the expansion chamber 6 through the first air vent 300 and the second air vent 301. The arrangement of the first air vent 300, the airtight baffle 302, and the second air vent 301 facilitates the matching of a larger expansion chamber 6, thereby improving the diffusion of the air outlet within the expansion chamber 6 and reducing noise generation. Since the second noise-reducing component is also attached to the airtight baffle 302, the airflow towards the airtight baffle 302 must pass through it, preventing or reducing direct impact on the airtight baffle 302 and further reducing noise generation. The presence of the airtight baffle 302 enhances the overall strength of the air vent wall 30, preventing insufficient strength that might occur if the entire air vent wall 30 were opened to form an air vent. Additionally, the outer surface of the airtight baffle 302 can be used for labeling.

[0055] The vacuum cleaner also includes a handle 14 and an outer casing 3. The handle 14 is located outside the outer casing 3 and connected to the outer casing 3. The air vent wall 30 is provided on the outer casing 3. The outer casing 3 extends downward and is provided with at least one first positioning part 31. The at least one first positioning part 31 and the air vent wall 30 clamp the second noise reduction component 13. The at least one first positioning part 31 is located in the expansion chamber 6. The at least one first positioning part 31 is an extended column arranged at intervals to reduce the obstruction of the airflow to the second noise reduction component 13.

[0056] The exhaust duct 2 includes an inner duct 21, an outer duct 22 connected to the inner duct 21, and a partition wall 23. The inner duct 21 is annular, surrounding the axis of rotation of the motor 10. The outer duct 22 is located outside the inner duct 21 and downstream of it. One end of the outer duct 22 forms the duct outlet 20, and the other end directly connects to the inner duct 21. The partition wall 23 is shared by the inner duct 21 and the outer duct 22, separating them. This design and layout are practical and facilitate extending the length of the exhaust duct 2, thereby reducing noise. The first noise reduction component 12 blocks the outer duct 22. The impeller is fixed to the shaft of the motor 10 and rotates under the drive of the motor 10 shaft.

[0057] One end of the external air duct 22 constitutes the end of the exhaust air duct 2. The first noise reduction component 12 blocks one end of the external air duct 22 to block the exhaust air duct 2. This arrangement can easily and conveniently block the exhaust air duct 2 and also helps to improve the noise reduction effect.

[0058] The partition wall 23 is airtight to prevent airflow from the inner air duct 21 from entering the outer air duct 22 through the partition wall 23. All airflow delivered by the exhaust air duct 2 is discharged from the exhaust air duct 20 and passes through the first noise reduction component 12, which facilitates more complete and thorough noise reduction of the airflow and also helps to prevent airflow from wandering. The partition wall 23 is arc-shaped, and the outer air duct 22 is arc-shaped.

[0059] The exhaust duct 2 forms a spiral duct, which, as the name suggests, is a spiral-shaped duct. The vacuum cleaner also includes a spiral sidewall 40 for forming the spiral duct. The spiral sidewall 40 has a circumferential wall 400 for enclosing the inner duct 21 and an outer wall 401 connecting the circumferential wall 400. The circumferential wall 400 is a non-closed ring. The partition wall 23 is part of the circumferential wall 400. The partition wall 23 and the outer wall 401 are used to form the outer duct 22. One end is a free end and also one end of the circumferential wall 400. The opposite end of the circumferential wall 400 is connected to one end of the outer wall 401 and forms the air outlet 210 of the inner air duct 21 between it and the free end of the partition wall 23. The air outlet 210 of the inner air duct 21 constitutes the air inlet of the outer air duct 22. The opposite end of the outer wall 401 and the opposite end of the partition wall 23 form the air outlet of the outer air duct 22. The air outlet of the outer air duct 22 constitutes the air duct outlet 20. This layout structure is novel and facilitates extending the length of the exhaust air duct 2. The spiral air duct also facilitates the orderly discharge of airflow, thereby reducing noise. The outer wall 401 is arc-shaped. The circumferential wall 400 surrounds the outer perimeter of the shaft axis of the motor 10.

[0060] The vacuum cleaner also includes an exhaust hood 4 and a lower cover 5. The exhaust hood 4 is located on the upper side of the lower cover 5, and the exhaust duct 2 is formed between the exhaust hood 4 and the lower cover 5. The spiral sidewall 40 is part of the exhaust hood 4. The lower cover 5 is provided with a spiral band 50 corresponding to the spiral sidewall 40. As the name suggests, the spiral band 50 extends in a spiral shape. The spiral band 50 and the spiral sidewall 40 are connected. In order to facilitate the connection between the spiral band 50 and the spiral sidewall 40, the spiral band 50 can form a groove for the lower edge of the spiral sidewall 40 to be embedded and / or a rib for being embedded in the lower edge of the spiral sidewall 40, so as to promote the stable connection and sealing between the spiral band 50 and the spiral sidewall 40.

[0061] The impeller is located below the motor 10. The vacuum cleaner also includes an impeller housing 15 and a third noise reduction component 16. The impeller is located inside the impeller housing 15, which is situated between the exhaust hood 4 and the lower cover 5. The impeller housing 15 has multiple exhaust ports 150 located circumferentially. The airflow discharged from the impeller enters the inner air duct 21 through the multiple exhaust ports 150. The third noise reduction component 16 is located within the inner air duct 21 and is fitted around the outer periphery of the impeller housing 15 to shield the multiple exhaust ports 150. The exhaust hood 4 has multiple first extensions 41 located within the inner air duct 21 and above the third noise reduction component 16. The first extensions 41 extend downward and abut against the third noise reduction component 16, thereby positioning the third noise reduction component 16 and preventing it from rising upwards. The third noise reduction component 16 is sandwiched between the multiple first extensions 41 and the lower cover 5.

[0062] The inner air duct 21 includes a lower annular portion 211 and an upper annular portion 212. The upper annular portion 212 is formed on the exhaust hood 4, and the lower annular portion 211 corresponds to the lower cover 5. The lower annular portion 211 surrounds the impeller housing 15, and the upper annular portion 212 surrounds the periphery of the motor 10. The third noise reduction component 16 is located inside the lower annular portion 211. The lower annular portion 211 is directly connected to the plurality of exhaust ports 150. The airflow discharged from the impeller enters the lower annular portion 211 through the plurality of exhaust ports 150 and flows upward into the upper annular portion 212. The plurality of first extensions 41 extend downward from the top side of the upper annular portion 212, and the plurality of first extensions 41 are at least partially housed in the upper annular portion 212.

[0063] The vacuum cleaner also includes a dust collection container 17, with a lower cover 5 covering the upper end of the dust collection container 17. The motor 10 is vertically positioned above the lower cover 5. The exhaust hood 4 also has a middle cylinder wall 42, which surrounds the motor 10 and forms the inner circumferential wall of the upper annular portion 212. The plurality of first extensions 41 are distributed around the outer periphery of the middle cylinder wall 42. The spiral air duct is spirally ascending, meaning the upper edge of the spiral air duct gradually rises along the spiral direction. The impeller cover 15 is fixedly mounted on the lower side of the motor 10. The outer cover 3 is located on the upper side of the lower cover 5 and covers the exhaust hood 4. The lower edge of the air vent wall 30 is abutted against the lower cover 5. The lower cover 5 has a suction port 51, a bottom plate 52, and an annular wall 53 for forming the lower annular portion 211. The suction airflow passes through the suction port 51, which penetrates the bottom plate 52. On both sides, the base plate 52 forms the bottom wall of the lower annular portion 211, and the impeller casing 15 is located between the lower end of the middle cylinder wall 42 and the base plate 52. The plurality of first extensions 41 and the base plate 52 clamp the third noise reduction component 16 vertically. The annular wall 53 extends upward from the periphery of the base plate 52, forming the outer peripheral wall of the lower annular portion 211. The circumferential wall 400 forms the outer peripheral wall of the upper annular portion 212, and the circumferential wall 400 and the annular wall 53 are vertically connected. The upper edge of the annular wall 53 forms part of the spiral band 50. A first flexible washer 180 is provided between the impeller casing 15 and the lower end of the middle cylinder wall 42. The lower end of the middle cylinder wall 42 abuts against the first flexible washer 180, which serves to dampen vibration and seal between the impeller casing 15 and the middle cylinder wall 42. A second flexible washer 181 is provided between the impeller casing 15 and the bottom plate 52, which also serves to dampen vibration and seal between them. In this embodiment, five first extensions 41 are evenly distributed around the periphery of the middle cylinder wall 42. The annular wall 53 consists of a lower cylindrical wall 530 and an upper conical wall 531, with the conical wall 531 and the cylindrical wall 530 integrally connected.

[0064] The expansion chamber 6 is generally arc-shaped and is formed by a portion of the lower cover 5, a portion of the exhaust hood 4, and the windshield wall 30. In this embodiment, the second noise reduction component 13 is sheet-shaped. During assembly, the second noise reduction component 13 is first clamped and positioned between at least one first positioning part 31 and the windshield wall 30, thereby fixing the second noise reduction component 13 to the outer cover 3. Then, the outer cover 3 is placed on the exhaust hood 4 and locked to the lower cover 5. The outer cover 3 is locked to the lower cover 5 by screws.

[0065] The vacuum cleaner also includes a distal wall 43, the distal wall 43, the expansion chamber 6, and the air outlet 20 located around the circumferential wall 400; the spiral air duct surrounds the outer periphery of the axis of rotation of the motor 10, a part of the circumferential wall 400 is opposite to the air window wall 30 in the radial direction of the axis of rotation of the motor 10, the distal wall 43 and the air outlet 20 are opposite to each other in the circumferential direction surrounding the inner air duct 21, the distal wall 43 connects the circumferential wall 400 and the air window wall 30, the distal wall 43 forms a side wall of the expansion chamber 6 and is located at the end of the expansion chamber 6 away from the air outlet 20. The distal wall 43 is part of the exhaust hood 4. The exhaust hood 4 is also provided with a top plate 44 and a spiral top wall 45 for forming a spiral air duct. The spiral side wall 40 is integrally connected to the spiral top wall 45. The top plate 44 covers the top side of the expansion chamber 6 and is integrally connected to the top edge of the distal wall 43. The first noise reduction component 12 is disposed at the air duct outlet 20. The bottom surface A of the spiral top wall 45 adjacent to the air duct outlet 20 is lower than the bottom surface B of the top plate 44 adjacent to the air duct outlet 20. A baffle 46 is connected between the bottom surface A and the bottom surface B. The baffle 46 blocks the side of the first noise reduction component 12 facing the exhaust air duct 2 to prevent the first noise reduction component 12 from entering the spiral air duct. The top of the first noise reduction component 12 is higher than the bottom surface A and abuts against the bottom surface B. The plurality of first extensions 41 extend downward from the top plate 44.

[0066] The vacuum cleaner also includes at least one second positioning part 47, which extends integrally downward from the top plate 44. The at least one second positioning part 47 blocks the side of the first noise reduction component 12 facing away from the external air duct 22 to prevent the first noise reduction component 12 from detaching from the air outlet 20 under the impact of the airflow in the exhaust duct 2. The spiral top wall 45 is in a spiral upward state, with one end of the spiral top wall 45 adjacent to the air outlet 20 being higher than the opposite end of the spiral top wall 45. The opposite end of the spiral top wall 45 is integrally connected to the free end of the partition wall 23. The bottom surface A, the baffle wall 46, and the bottom surface B are connected to form a stepped shape. The second positioning part 47 is an extension column that extends integrally downward from the top plate 44. The opposite end of the outer wall 401 forms a corner part 48, in which the first noise reduction component 12 is partially accommodated. The first noise reduction component 12 is limited to the at least one second positioning part 47, the corner part 48, and the baffle wall 46. The first noise reduction component 12 is in the form of a block. During assembly, the first noise reduction component 12 is first clamped and positioned between at least one second positioning part 47, corner part 48 and baffle 46, and then the exhaust fan hood 4 is installed on the lower cover 5. The exhaust fan hood 4 is locked to the lower cover 5 by screws.

[0067] The air outlet 20 of the air duct faces the window wall 30. A first noise reduction component 12 is disposed at a predetermined position in the exhaust air duct 2. At least one second positioning part 47 blocks one side of the first noise reduction component 12 to prevent it from dislodging from the predetermined position due to the impact of airflow in the exhaust air duct 2. In this embodiment, the predetermined position is the air outlet 20 of the air duct, meaning the first noise reduction component 12 is disposed at the air outlet 20, and the at least one second positioning part 47 blocks the downstream side of the first noise reduction component 12. The airflow transported by the exhaust air duct flows from the upstream side of the first noise reduction component 12 to the downstream side of the first noise reduction component 12 and passes through it.

[0068] The vacuum cleaner also includes a dust collection container 17 and multiple wheels 7 for use as a portable vacuum cleaner. The capacity of the dust collection container 17 is between 0.5 gallons and 30 gallons, and exemplaryly, it can be selected between 1 gallon and 20 gallons. The rated power of the motor 10 is between 100W and 3000W, and exemplaryly, it can be selected between 200W and 1900W. The first noise reduction component 12 and the second noise reduction component 13 can be made of sound-absorbing cotton, such as polyurethane foam, polyether foam, glass wool, felt, rock wool, etc. In order to balance the noise reduction performance and airflow performance of the vacuum cleaner, the air permeability of the first noise reduction component 12 is higher than that of the second noise reduction component 13. Exemplarily, the PPI (Pores Per Linear Inch, i.e., pore density: the average number of pores per unit inch) of the first noise reduction component 12 is lower than that of the second noise reduction component 13. For example, the PPI of the first noise reduction component 12 is 20, and the PPI of the second noise reduction component 13 is 25. The filter 19 is located inside the dust collection container 17 and installed on the bottom side of the lower cover 5. The dust collection container 17 is provided with a suction port 170. When vacuuming up the waste, the waste enters the dust collection container 17 through the suction port 170 along with the suction airflow. The suction airflow flows through the filter 19, thereby being filtered by the filter 19 and leaving the waste in the dust collection container 17. Further, the suction airflow flows to the impeller through the suction port 51 and is discharged by the impeller to form an exhaust airflow. The exhaust airflow is discharged into the lower annular portion 211 through the multiple exhaust ports 150 and passes through the third noise reduction component 16. Further, the exhaust airflow flows into the upper annular portion 212 and enters the outer air duct 22 through the air outlet of the inner air duct 21. The exhaust airflow flows along the outer air duct 22 to the air outlet of the outer air duct 22 and passes through the first noise reduction component 12 to enter the expansion chamber 6. Then it passes through the first noise reduction component 12 and finally exits the vacuum cleaner from the first air window 300 and the second air window 301.

[0069] The vacuum cleaner also includes an air inlet 330, an air outlet 360, a fourth noise reduction component 71 corresponding to the air inlet 330, and a fifth noise reduction component 72 corresponding to the air outlet 360. The cooling airflow for the motor 10 enters the vacuum cleaner through the air inlet 330 and exits through the air outlet 360. The cooling airflow sequentially passes through the air inlet 330, the fourth noise reduction component 71, the interior of the motor 10, the fifth noise reduction component 72, and the air outlet 360. The motor 10 is equipped with a cooling fan 100, which rotates to drive airflow and form the cooling airflow. The fourth noise reduction component 71 and the third noise reduction component 16 can be made of sound-absorbing cotton, etc.

[0070] The vacuum cleaner also includes a first latch 90 and a second latch 91. The handle 14 is connected to the outer casing 3, and the lower cover 5 covers the upper end of the dust collection container 17. The dust collection container 17 and the lower cover 5 are detachably assembled together via the first latch 90 and the second latch 91. The first latch 90 is fastened to one edge of the lower cover 5, and the second latch 91 is fastened to the opposite edge of the lower cover 5. The outer casing 3 is installed on the upper side of the lower cover 5. The air inlet 330 and air outlet 360 are located on the left and right sides of the outer casing 3. The air vent wall 30 is located on the front or rear side of the outer casing 3 (in this embodiment, the air vent wall 30 is located on the rear side of the outer casing 3). The shell 3 also includes a first recess 33 and a second recess 36, the first recess 33 and the second recess 36 are located on the left and right sides of the outer shell 3, the first buckle 90 is at least partially received in the first recess 33, the second buckle 91 is at least partially received in the second recess 36, the air inlet 330 is provided in the first recess 33, the air outlet 360 is provided in the second recess 36, the fourth noise reduction component 71 is located on the side of the air inlet 330 opposite to the first buckle 90, and the fifth noise reduction component 72 is located on the side of the air outlet 360 opposite to the second buckle 91. This layout effectively utilizes the corresponding first recess 33 and second recess 36 on opposite sides of the outer casing 3, which at least partially accommodate the first latch 90 and the second latch 91, to set up the air inlet 330 and air outlet 360 for heat dissipation of the motor 10. This makes the first recess 33 and the second recess 36 form an air inlet and air outlet relationship, expanding the overall function of the first recess 33 and the second recess 36. Furthermore, the air inlet 330 and the air outlet 360 are located on the left and right sides of the outer casing 3 and are thus fully separated. The heat dissipation airflow of the motor 10 enters through the air inlet 330 on one side of the outer casing 3 and exits through the air outlet 360 on the opposite side of the outer casing 3. This effectively separates the relatively cold air intake of the air inlet 330 from the relatively hot air outlet of the air outlet 360, improving the heat dissipation efficiency of the motor 10. In this embodiment, the first buckle 90 and the second buckle 91 have basically the same structure and can be used interchangeably; the first buckle 90 is pivotally connected to the upper left side of the dust collection container 17, and the second buckle 91 is pivotally connected to the upper right side of the dust collection container 17.

[0071] The outer casing 3 has a first raised portion 32 and a second raised portion 35 located on the left and right sides of the outer casing 3. The first raised portion 32 is located on the side of the outer casing 3 corresponding to the first fastener 90, and the second raised portion 35 is located on the side of the outer casing 3 corresponding to the second fastener 91. The first recessed portion 33 is recessed in the first raised portion 32, and the second recessed portion 36 is recessed in the second raised portion 35. The fourth noise reduction component 71 is located inside the first raised portion 32, and the fifth noise reduction component 72 is located inside the second raised portion 35. This design makes full use of the internal space of the first raised portion 32 and the second raised portion 35, and allows for more convenient configuration of the fourth noise reduction component 71 and the fifth noise reduction component 72.

[0072] The first raised portion 32 is provided with a first outer side wall 340 and a second outer side wall 341 located on the front and rear sides of the first raised portion 32, and a first top side wall 342 located on the top of the first raised portion 32. The fourth noise reduction component 71 is located between the first outer side wall 340 and the second outer side wall 341. The fourth noise reduction component 71 is plate-shaped facing the air inlet window 330. The front side of the fourth noise reduction component 71 is attached to the first outer side wall 340, the rear side of the fourth noise reduction component 71 is attached to the second outer side wall 341, the upper side of the fourth noise reduction component 71 is attached to the first top side wall 342, and the bottom side of the fourth noise reduction component 71 is attached to the lower cover 5. This design can enhance the sealing between each side of the fourth noise reduction component 71 and each side wall (341, 342, 343) of the first raised portion 32 and the lower cover 5, enhance the noise reduction effect, and also enhance the positional stability of the fourth noise reduction component 71. The second raised portion 35 is provided with a third outer side wall 370 and a fourth outer side wall 371 located on the front and rear sides of the second raised portion 35, and a second top side wall 372 located on the top of the second raised portion 35. The fifth noise reduction component 72 is located between the third outer side wall 370 and the fourth outer side wall 371. The fifth noise reduction component 72 is plate-shaped facing the air outlet 360. The front side of the fifth noise reduction component 72 is attached to the third outer side wall 370, the rear side of the fifth noise reduction component 72 is attached to the fourth outer side wall 371, the upper side of the fifth noise reduction component 72 is attached to the second top side wall 372, and the bottom side of the fifth noise reduction component 72 is attached to the lower cover 5. This design can enhance the sealing between each side of the fifth noise reduction component 72 and each side wall (371, 372, 373) of the second raised portion 35 and the lower cover 5, enhance the noise reduction effect, and also enhance the positional stability of the fifth noise reduction component 72. The lower ends of the first outer wall 340, the second outer wall 341, the third outer wall 370, the fourth outer wall 371, the air inlet window 330, and the air outlet window 360 are respectively connected to the lower cover 5.

[0073] The fourth noise reduction component 71 is located on the lower side of the first top sidewall 342, and the fifth noise reduction component 72 is located on the lower side of the second top sidewall 372. The outer casing 3 is provided with at least one third positioning part 380 for fixing the fourth noise reduction component 71 and at least one fourth positioning part 381 for fixing the fifth noise reduction component 72. The at least one third positioning part 380 is located inside the first raised part 32 and extends integrally downward from the first top sidewall 342. The at least one fourth positioning part 381 is located inside the second raised part 35 and extends integrally downward from the second top sidewall 372.

[0074] The fourth noise reduction component 71 is plate-shaped and shields the inside of the air inlet window 330, and the fifth noise reduction component 72 is plate-shaped and shields the inside of the air outlet window 360; the at least one third positioning part 380 clamps the fourth noise reduction component 71 with the air inlet window 330, and the at least one fourth positioning part 381 clamps the fifth noise reduction component 72 with the air outlet window 360.

[0075] The air inlet 330 is provided with a plurality of first grid plates 331 arranged in parallel, the plurality of first grid plates 331 being located on the side of the air inlet 330 opposite to the first fastener 90. The air outlet 360 is provided with a plurality of second grid plates arranged in parallel, the plurality of second grid plates being located on the side of the air outlet 360 opposite to the second fastener 91. At least one third positioning part 380 clamps a fourth noise reduction component 71 with the plurality of first grid plates 331. At least one fourth positioning part 381 clamps a fifth noise reduction component 72 with the plurality of second grid plates.

[0076] The vacuum cleaner also includes a heat dissipation duct 80. The motor 10 is provided with a heat dissipation air inlet 101 and a heat dissipation air outlet 102. The heat dissipation airflow enters the motor 10 from the heat dissipation air inlet 101 and exits the motor 10 from the heat dissipation air outlet 102 and flows into the heat dissipation duct 80. One end of the heat dissipation duct 80 is provided with an air outlet 800. The air outlet window 360 is located downstream of the air outlet 800 of the heat dissipation duct 80. The heat dissipation duct 80 is fluidly connected between the heat dissipation air outlet 102 of the motor 10 and the interior of the second raised portion 35.

[0077] The air outlet 800 and the air outlet window 360 of the heat dissipation air duct 80 are located on the left and right sides of the second raised portion 35. The air outlet 800 of the heat dissipation air duct 80 faces the air outlet window 360. The air outlet 800 of the heat dissipation air duct 80 is directly connected to the interior of the second raised portion 35. This design helps to improve air outlet efficiency.

[0078] The vacuum cleaner also includes a heat dissipation shroud 81, a sealing gasket 82, and an accessory bag assembly 83 for forming a heat dissipation duct 80. The heat dissipation shroud 81 is roughly whistle-shaped. The accessory bag assembly 83 is installed in the dust collection container 17. The air outlet 800 of the heat dissipation duct 80 is located at the end of the heat dissipation shroud 81 that is relatively close to the air outlet window 360. The heat dissipation shroud 81 has a collar portion 810. The sealing gasket 82 is fitted on the upper end of the motor 10 and seals between the upper periphery of the motor 10 and the collar portion 810 to isolate the heat dissipation air inlet 101 of the motor 10 from the heat dissipation duct 80, thereby preventing the heat dissipation airflow from entering the heat dissipation duct 80 from between the upper periphery of the motor 10 and the collar portion 810 instead of flowing into the heat dissipation air inlet 101.

[0079] The heat dissipation outlet 102 of the motor 10 is located on the bottom side of the motor 10. The heat dissipation duct 80 includes an annular portion 801 surrounding the motor 10 and an outlet portion 802 located downstream of the annular portion 801. Relative to the air outlet window 360, the air outlet 800 of the heat dissipation duct 80 is located at the end of the outlet portion 802 that is relatively closer to the air outlet window 360; relative to the annular portion 801, the air outlet 800 of the heat dissipation duct 80 is located at the end of the outlet portion 802 that is relatively farther away from the annular portion 801.

[0080] The first recessed portion 33 has a first groove 332, and the second recessed portion 36 has a second groove 362. The first groove 332 is located on the side of the air inlet 330 facing the first latch 90, and the second groove 362 is located on the side of the air outlet 360 facing the second latch 91. The first latch 90 is at least partially received in the first groove 332, and the second latch 91 is at least partially received in the second groove 362. The air inlet 330 directly connects the interior of the first raised portion 32 with the first groove 332, and the air outlet 360 directly connects the interior of the second raised portion 35 with the second groove 362. The heat dissipation airflow passes sequentially through the first groove 332 and the air inlet 360. The airflow enters the first raised portion 32 and passes through the fourth noise reduction component 71 within the first raised portion 32. The cooling airflow flows downward from the cooling air inlet 101 through the interior of the motor 10 and exits the motor 10 from the cooling air outlet 102 on the bottom side of the motor 10. After exiting from the cooling air outlet 102, the cooling airflow enters the annular portion 801 of the cooling duct 80. The cooling airflow flows upward to the upper part of the annular portion 801 and then merges into the outlet portion 802 of the cooling duct 80. It exits the cooling duct 80 from the air outlet 800 and enters the second raised portion 35. The cooling airflow passes through the fifth noise reduction component 72 within the second raised portion 35 and is discharged through the air outlet 360.

Claims

1. A vacuum cleaner, characterized in that, include: The vacuum cleaner includes a motor, an impeller that rotates under the motor's drive to generate suction airflow, an exhaust duct, a ventilated window wall, and a breathable second noise reduction component. The exhaust duct has an air outlet at its end for exhausting air. The window wall is located downstream of the air outlet, and the second noise reduction component is located inside the window wall. The vacuum cleaner also includes an expansion chamber located downstream of the air outlet. The air outlet forms the air inlet of the expansion chamber. The second noise reduction component is located inside the expansion chamber. Airflow from the air outlet enters the expansion chamber and passes through the second noise reduction component and the window wall before exiting the expansion chamber. The rated power of the motor is between 100W and 3000W.

2. The vacuum cleaner as claimed in claim 1, wherein, Also includes: A breathable first noise reduction component, which blocks the exhaust duct; The airflow output from the air outlet of the air duct spreads out in the expansion chamber, and the airflow discharged by the impeller flows through the exhaust air duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence.

3. The vacuum cleaner as described in claim 1, wherein, The air vent wall is exposed on the outside of the vacuum cleaner and connects the outside of the vacuum cleaner with the expansion chamber. The air vent wall is provided with a first air vent, a second air vent, and an airtight baffle connecting the first air vent and the second air vent. The first air vent is located on the side of the airtight baffle closer to the air outlet of the air duct, and the second air vent is located on the side of the airtight baffle away from the air outlet of the air duct. A second noise reduction component is attached to the inner side of the first air vent, the inner side of the second air vent, and the inner side of the airtight baffle. The second noise reduction component completely blocks the first air vent and the second air vent. The airflow that enters the expansion chamber from the air outlet of the air duct is discharged from the expansion chamber through the first air vent and the second air vent.

4. The vacuum cleaner as claimed in claim 1, wherein, Also includes: The device includes a handle and an outer casing. The handle is located on the outside of the outer casing and connected to it. The windshield wall is located on the outer casing. The outer casing extends downward and is provided with at least one first positioning part. The at least one first positioning part and the windshield wall clamp a second noise reduction component. The at least one first positioning part is located in the expansion cavity.

5. The vacuum cleaner as claimed in claim 1, wherein, The exhaust duct includes an inner duct, an outer duct connected to the inner duct, and a partition wall. The inner duct is annular around the axis of the motor shaft, and the impeller can rotate under the drive of the motor shaft. The outer duct is located outside the inner duct and downstream of the inner duct. One end of the outer duct forms the air outlet of the duct, and the other end of the outer duct is directly connected to the inner duct. The partition wall is shared by the inner and outer ducts and is used to separate the inner and outer ducts.

6. The vacuum cleaner as claimed in claim 5, wherein, Also includes: A breathable first noise reduction component is provided, which blocks the exhaust duct. The airflow discharged by the impeller flows through the exhaust duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence. One end of the external air duct constitutes the end of the exhaust duct, and the first noise reduction component blocks one end of the external air duct to block the exhaust duct.

7. The vacuum cleaner as claimed in claim 5, wherein, Also includes: The first noise reduction component is breathable and blocks the exhaust duct. The airflow discharged by the impeller flows through the exhaust duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence. The partition wall is airtight to prevent the airflow of the inner duct from entering the outer duct through the partition wall. All the airflow transported by the exhaust duct is discharged from the exhaust duct through the duct outlet and passes through the first noise reduction component.

8. The vacuum cleaner as claimed in claim 5, wherein, Also includes: A breathable first noise reduction component blocks the exhaust duct. The airflow discharged by the impeller flows through the exhaust duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence. The partition wall is arc-shaped, and the external air duct is arc-shaped. The first noise reduction component blocks the external air duct.

9. The vacuum cleaner as claimed in claim 5, wherein, The exhaust duct forms a spiral duct, and the vacuum cleaner also includes a spiral sidewall for forming the spiral duct. The spiral sidewall has a circumferential wall for forming an inner duct and an outer wall connecting the circumferential wall. The circumferential wall is a non-closed ring. The partition wall is part of the circumferential wall. The partition wall and the outer wall are also used to form an outer duct. One end of the partition wall is a free end and forms one end of the circumferential wall. The other end of the circumferential wall is connected to one end of the outer wall and forms the air outlet of the inner duct between the partition wall and the free end of the partition wall. The air outlet of the inner duct forms the air inlet of the outer duct. The other end of the outer wall and the other end of the partition wall form the air outlet of the outer duct. The air outlet of the outer duct forms the air outlet of the duct.

10. The vacuum cleaner as claimed in claim 9, wherein, The partition wall, external wall, and external air duct are arc-shaped, and the circumferential wall surrounds the outer perimeter of the motor shaft axis.

11. The vacuum cleaner of claim 9, further comprising a lower cover and an exhaust hood, the exhaust hood being located above the lower cover, an exhaust duct being formed between the exhaust hood and the lower cover, and a spiral sidewall being part of the exhaust hood; the vacuum cleaner further comprising an impeller housing and a third noise reduction component, the impeller being located inside the impeller housing, the impeller housing being located between the exhaust hood and the lower cover, the impeller housing having a plurality of exhaust ports in the circumferential direction of the impeller housing, the airflow discharged by the impeller entering the inner duct through the plurality of exhaust ports, the third noise reduction component being located inside the inner duct, the third noise reduction component being fitted around the outer periphery of the impeller housing to shield the plurality of exhaust ports, the exhaust hood having a plurality of first extensions, the plurality of first extensions being located inside the inner duct and above the third noise reduction component, the first extensions extending downward and abutting against the third noise reduction component.

12. The vacuum cleaner as claimed in claim 11, wherein, The internal air duct includes an upper annular portion and a lower annular portion. The upper annular portion is formed in the exhaust hood, and the lower annular portion surrounds the impeller casing. The third noise reduction component is located inside the lower annular portion. The lower annular portion is directly connected to the plurality of exhaust ports. The airflow discharged from the impeller enters the lower annular portion through the plurality of exhaust ports and flows upward into the upper annular portion. The plurality of first extension portions are at least partially housed in the upper annular portion.

13. The vacuum cleaner as claimed in claim 12 further includes a dust collection container, a lower cover covering the upper end of the dust collection container, a motor standing upright on the upper side of the lower cover, and an exhaust hood further having a middle cylinder wall surrounding the motor, the middle cylinder wall forming the inner peripheral wall of the upper annular portion, the plurality of first extension portions being distributed around the middle cylinder wall, and the plurality of first extension portions extending downward from the top side of the upper annular portion.

14. The vacuum cleaner as described in claim 13 further includes an outer casing, which is located on the upper side of the lower cover and covers the exhaust hood. A vent wall is provided on the outer casing, and the lower edge of the vent wall is abutted against the lower cover. The lower cover is provided with a suction port, a bottom plate, and an annular wall for forming a lower annular portion. The suction airflow flows through the suction port, which penetrates the upper and lower sides of the bottom plate. The bottom plate forms the bottom wall of the lower annular portion. An impeller cover is located between the lower end of the middle cylinder wall and the bottom plate. The plurality of first extensions clamp the third noise reduction component between the bottom plate and the bottom plate. The annular wall extends upward from the periphery of the bottom plate, and the circumferential wall and the annular wall are joined vertically. The circumferential wall forms the outer circumferential wall of the upper annular portion, and the annular wall forms the outer circumferential wall of the lower annular portion.

15. The vacuum cleaner as claimed in claim 9, wherein, It also includes a distal wall, the distal wall, the expansion chamber, and the air outlet of the duct located on the periphery of the circumferential wall; the spiral air duct surrounds the periphery of the motor shaft axis, the air window wall forms the outer wall of the expansion chamber relative to the outside of the vacuum cleaner, a part of the circumferential wall is opposite to the air window wall in the radial direction of the motor shaft, the distal wall and the air outlet of the duct are opposite to each other in the circumferential direction surrounding the inner air duct, the distal wall connects the circumferential wall and the air window wall, the distal wall forms a side wall of the expansion chamber and is located at the end of the expansion chamber away from the air outlet of the duct.

16. The vacuum cleaner of claim 15, wherein, It also includes a lower cover, an exhaust hood, and a breathable first noise reduction component. The first noise reduction component blocks the exhaust duct. The airflow discharged from the impeller flows through the exhaust duct and passes sequentially through the first noise reduction component, the second noise reduction component, and the air vent wall. The exhaust hood is located on the upper side of the lower cover. The exhaust duct is formed between the exhaust hood and the lower cover. The distal wall and the spiral sidewall are part of the exhaust hood. The exhaust hood also has a top plate and a spiral top wall for forming the spiral duct. The spiral sidewall and the spiral top wall are integrally connected. The distal wall is part of the exhaust hood. Part of it, the top plate covers the top side of the expansion chamber, the top plate is integrally connected to the top edge of the far end wall, the first noise reduction component is set at the air outlet of the air duct, the bottom surface A of the spiral top wall adjacent to the air outlet of the air duct is lower than the bottom surface B of the top plate adjacent to the air outlet of the air duct, and a baffle is connected between the bottom surface A and the bottom surface B; the baffle blocks the side of the first noise reduction component facing the exhaust air duct to prevent the first noise reduction component from entering the spiral air duct, and the top of the first noise reduction component is higher than the bottom surface A and abuts against the bottom surface B.

17. The vacuum cleaner of claim 16, further comprising: At least one second positioning part extends integrally downward from the top plate. The at least one second positioning part blocks the side of the first noise reduction component facing away from the external air duct to prevent the first noise reduction component from detaching from the air outlet of the air duct under the impact of the airflow in the exhaust air duct. The spiral top wall is in a spiral upward state. The end of the spiral top wall adjacent to the air outlet of the air duct is higher than the opposite end of the spiral top wall. The opposite end of the spiral top wall is integrally connected to the free end of the partition wall.

18. The vacuum cleaner as claimed in claim 1, wherein, Also includes: A breathable first noise reduction component is provided, which blocks the exhaust duct. The airflow discharged by the impeller flows through the exhaust duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence. The first noise reduction component is located at the air outlet of the duct, and the air outlet of the duct faces the windshield wall.

19. The vacuum cleaner as claimed in claim 1, wherein, Also includes: At least one second positioning part, and further comprising: a breathable first noise reduction component, the first noise reduction component blocking the exhaust duct, the airflow discharged by the impeller flowing through the exhaust duct and passing through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence, the first noise reduction component being disposed at a predetermined position in the exhaust duct, and the at least one second positioning part blocking one side of the first noise reduction component to prevent the first noise reduction component from being dislodged from the predetermined position under the impact of the airflow in the exhaust duct.

20. The vacuum cleaner of claim 19, wherein, The predetermined position is the air outlet of the air duct, and the at least one second positioning part blocks the downstream side of the first noise reduction component.

21. The vacuum cleaner as claimed in claim 19, wherein, The at least one second positioning part is an extension column arranged at intervals.

22. The vacuum cleaner as claimed in claim 1, wherein, Also includes: The first noise reduction component is breathable and blocks the exhaust duct. The airflow discharged by the impeller flows through the exhaust duct and passes through the first noise reduction component, the second noise reduction component, and the windshield wall in sequence. The pore density of the first noise reduction component is less than that of the second noise reduction component.

23. The vacuum cleaner of claim 1, further comprising: The system includes an air inlet window, an air outlet window, a fourth noise reduction component for ventilation corresponding to the air inlet window, and a fifth noise reduction component for ventilation corresponding to the air outlet window. The cooling airflow for the motor enters the vacuum cleaner through the air inlet window and exits the vacuum cleaner through the air outlet window. The cooling airflow passes sequentially through the air inlet window, the fourth noise reduction component, the interior of the motor, the fifth noise reduction component, and the air outlet window. The motor is equipped with a cooling fan, which rotates to drive airflow and form the cooling airflow.

24. The vacuum cleaner of claim 23, further comprising: The dust collection container comprises an outer shell, a lower cover, a first latch, a second latch, and a handle. The handle is connected to the outer shell. The lower cover covers the upper end of the dust collection container. The dust collection container and the lower cover are detachably assembled together via the first latch and the second latch. The first latch is fastened to one edge of the lower cover, and the second latch is fastened to the opposite edge of the lower cover. The outer shell is installed on the upper side of the lower cover. The air inlet and air outlet are located on the left and right sides of the outer shell, and the air outlet wall is located on the front or rear side of the outer shell. The outer shell also has a first recess and a second recess, located on the left and right sides of the outer shell. The first latch is at least partially received in the first recess, and the second latch is at least partially received in the second recess. The air inlet is located in the first recess, and the air outlet is located in the second recess. The fourth noise reduction component is located on the side of the air inlet facing away from the first latch, and the fifth noise reduction component is located on the side of the air outlet facing away from the second latch.

25. The vacuum cleaner of claim 24, wherein, The outer shell has a first raised portion and a second raised portion located on the left and right sides of the outer shell. The first raised portion is located on the side of the outer shell corresponding to the first buckle, and the second raised portion is located on the side of the outer shell corresponding to the second buckle. The first recessed portion is recessed in the first raised portion, and the second recessed portion is recessed in the second raised portion. The fourth noise reduction component is located in the first raised portion, and the fifth noise reduction component is located in the second raised portion.

26. The vacuum cleaner of claim 25, wherein, The first raised portion has a first outer side wall and a second outer side wall located on the front and rear sides of the first raised portion, and a first top side wall located at the top of the first raised portion. The fourth noise reduction component is located between the first outer side wall and the second outer side wall. The fourth noise reduction component is plate-shaped facing the air inlet window. The front side of the fourth noise reduction component is attached to the first outer side wall, the rear side of the fourth noise reduction component is attached to the second outer side wall, the upper side of the fourth noise reduction component is attached to the first top side wall, and the bottom side of the fourth noise reduction component is attached to the lower cover. The second raised portion has a third outer side wall and a fourth outer side wall located on the front and rear sides of the second raised portion. The side wall, the second top side wall located at the top of the second raised part, the fifth noise reduction component located between the third outer side wall and the fourth outer side wall, the fifth noise reduction component is plate-shaped facing the air outlet, the front side of the fifth noise reduction component is attached to the third outer side wall, the rear side of the fifth noise reduction component is attached to the fourth outer side wall, the upper side of the fifth noise reduction component is attached to the second top side wall, the bottom side of the fifth noise reduction component is attached to the lower cover, the lower end of the first outer side wall, the lower end of the second outer side wall, the lower end of the third outer side wall, the lower end of the fourth outer side wall, the lower end of the air inlet window, and the lower end of the air outlet window are respectively connected to the lower cover.

27. The vacuum cleaner of claim 25, wherein, The first raised portion is further provided with a first top sidewall located at the top of the first raised portion, and the second raised portion is further provided with a second top sidewall located at the top of the second raised portion. The fourth noise reduction component is located on the lower side of the first top sidewall, and the fifth noise reduction component is located on the lower side of the second top sidewall. The outer casing is provided with at least one third positioning portion for fixing the fourth noise reduction component and at least one fourth positioning portion for fixing the fifth noise reduction component. The at least one third positioning portion is located inside the first raised portion and extends integrally downward from the first top sidewall, and the at least one fourth positioning portion is located inside the second raised portion and extends integrally downward from the second top sidewall.

28. The vacuum cleaner of claim 24, wherein, The fourth noise reduction component is plate-shaped and shields the inside of the air inlet window, and the fifth noise reduction component is plate-shaped and shields the inside of the air outlet window; the outer casing is provided with at least one third positioning part for fixing the fourth noise reduction component and at least one fourth positioning part for fixing the fifth noise reduction component, the at least one third positioning part clamps the fourth noise reduction component with the air inlet window, and the at least one fourth positioning part clamps the fifth noise reduction component with the air outlet window.

29. The vacuum cleaner of claim 28, wherein, The air inlet window is provided with a plurality of first grid plates arranged in parallel, the plurality of first grid plates being located on the side of the air inlet window opposite to the first latch; the air outlet window is provided with a plurality of second grid plates arranged in parallel, the plurality of second grid plates being located on the side of the air outlet window opposite to the second latch; at least one third positioning part clamps a fourth noise reduction component with the plurality of first grid plates; at least one fourth positioning part clamps a fifth noise reduction component with the plurality of second grid plates.

30. The vacuum cleaner of claim 25, further comprising: The motor is provided with a heat dissipation air inlet and a heat dissipation air outlet. The heat dissipation airflow enters the motor from the heat dissipation air inlet and exits the motor from the heat dissipation air outlet into the heat dissipation air duct. One end of the heat dissipation air duct is provided with an air outlet. The air outlet window is located downstream of the air outlet of the heat dissipation air duct. The heat dissipation air duct is fluidly connected between the heat dissipation air outlet of the motor and the interior of the second raised part.

31. The vacuum cleaner as claimed in claim 30, wherein, The air outlet and air window of the heat dissipation duct are located on the left and right sides of the second raised part. The air outlet of the heat dissipation duct faces the air window and the air outlet of the heat dissipation duct is directly connected to the interior of the second raised part.

32. The vacuum cleaner of claim 31, further comprising: The heat dissipation shroud and sealing gasket are used to form a heat dissipation air duct. The air outlet of the heat dissipation air duct is located at the end of the heat dissipation shroud that is relatively close to the air outlet window. The heat dissipation shroud has a collar part. The sealing gasket is fitted on the upper end of the motor and seals between the upper edge of the motor and the collar part to isolate the heat dissipation air inlet of the motor from the heat dissipation air duct.

33. The vacuum cleaner as claimed in claim 31, wherein, The heat dissipation vent of the motor is located on the bottom side of the motor. The heat dissipation duct includes an annular part surrounding the motor and an outlet part located downstream of the annular part. Relative to the air outlet window, the air outlet of the heat dissipation duct is located at the end of the outlet part that is relatively closer to the air outlet window; relative to the annular part, the air outlet of the heat dissipation duct is located at the end of the outlet part that is relatively farther away from the annular part.

34. The vacuum cleaner as claimed in claim 33, wherein, The first recessed portion has a first groove, and the second recessed portion has a second groove. The first groove is located on the side of the air inlet window facing the first latch, and the second groove is located on the side of the air outlet window facing the second latch. The first latch is at least partially received in the first groove, and the second latch is at least partially received in the second groove. The air inlet window directly connects the interior of the first raised portion with the first groove, and the air outlet window directly connects the interior of the second raised portion with the second groove. The cooling airflow sequentially enters the first raised portion through the first groove and the air inlet window, passes through the fourth noise reduction component inside the first raised portion, and flows downward from the cooling air inlet into the interior of the motor and out of the motor from the cooling air outlet on the bottom side of the motor. After flowing out of the cooling air outlet, the cooling airflow enters the annular portion of the cooling air duct. The cooling airflow flows upward to the upper part of the annular portion and then merges into the outlet portion of the cooling air duct, and exits the cooling air duct from the air outlet of the cooling air duct and enters the second raised portion. The cooling airflow passes through the fifth noise reduction component inside the second raised portion and is discharged through the air outlet window.

35. The vacuum cleaner as claimed in claim 25, wherein, The first recessed portion has a first groove, and the second recessed portion has a second groove. The first groove is located on the side of the air inlet window facing the first latch, and the second groove is located on the side of the air outlet window facing the second latch. The first latch is at least partially received in the first groove, and the second latch is at least partially received in the second groove. The air inlet window directly connects the interior of the first raised portion with the first groove, and the air outlet window directly connects the interior of the second raised portion with the second groove. The heat dissipation airflow sequentially enters the first raised portion through the first groove and the air inlet window and passes through the fourth noise reduction component inside the first raised portion.

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