Dust collector

Abstract

The application relates to a dust collector, which comprises a dust bin provided with an air inlet channel and an air outlet channel communicated with a dust chamber; a separation assembly installed on a bin cover, at least part of the separation assembly being located in the dust chamber; an opening in a hexagonal shape, the inner periphery of the opening comprising a first edge, a second edge and two side edges arranged opposite to each other along the length direction of the first edge, the air inlet channel being arranged on a first side wall plate of the dust bin, the plane where the opening is located being a first plane, the outer periphery of the orthographic projection of the separation assembly on the first plane being defined as an outer contour line, the minimum distance between the outer contour line and the first edge and the two side edges being equal or basically equal, and being a, and the minimum distance between the outer periphery of the separation assembly and the second edge being A, A / a=1.7-2.5. The application is favorable for reducing the uneven distribution of sound energy generated when air flow surrounds the separation assembly, thereby achieving a better noise reduction effect without reducing the air flow.

Description

Technical Field

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

[0002] A vacuum cleaner is an electrical appliance used to clean dust and debris from the floor.

[0003] Vacuum cleaners typically consist of a dustbin, motor, fan, and filter. The dustbin comprises a barrel with an open top and a lid covering the opening. The barrel and lid together form a dust chamber, where the filter is located. The filter, along with the motor and fan, is mounted on the lid. When the vacuum cleaner is started, the motor drives the fan, which creates negative pressure inside the dustbin. This pressure draws dust or debris from the floor into the dustbin through the suction head. After being filtered by the filter inside the dustbin, clean air is exhausted through the exhaust vent.

[0004] Existing vacuum cleaners generate significant noise during operation, impacting user experience. Currently, sound-absorbing sponges are commonly used to achieve noise reduction or silence. However, these sponges easily attract dust, breed bacteria, and produce odors, and are also tedious to clean. Furthermore, the sound-absorbing sponges are usually located near the motor, and during high-speed operation, there is a risk of the sponge igniting, posing a safety hazard. Summary of the Invention

[0005] Therefore, it is necessary to provide a safe, reliable vacuum cleaner that also achieves noise reduction.

[0006] This application provides a vacuum cleaner, including:

[0007] A dust bin includes a body with an open top and a lid covering the open top. The body and lid together form a dust chamber. The dust bin has an air inlet channel and an air outlet channel that communicate with the dust chamber. The air inlet channel is located on the first side wall of the dust bin.

[0008] A separation component is installed on the lid, with at least a portion of the separation component located within the dust chamber. Along the airflow path, the separation component is located upstream of the exhaust duct. The opening is hexagonal, and its inner periphery includes a first edge, a second edge, and two side edges arranged at intervals along the length of the first edge. The second edge is located on the first side wall. The plane containing the opening is defined as the first plane, and the outer periphery of the orthographic projection of the separation component onto the first plane is defined as the outer contour line. The minimum distance between the outer contour line and the first edge and the two side edges is equal or substantially equal, and both are 'a'. The minimum distance between the outer periphery of the separation component and the second edge is A, where A / a = 1.7~2.5.

[0009] In one embodiment, any two adjacent sidewalls in the peripheral wall of the barrel are connected by a smooth transition.

[0010] In one embodiment, an airflow region is formed between the outer peripheral wall of the upper region of the separation component and the inner peripheral wall of the barrel body. The airflow region is divided into a circulation region and a turbulent region along the circumference of the separation component. The turbulent region is located on the side where the air inlet channel is located and is located between the axis of the outer contour line and the second edge.

[0011] In one embodiment, the air inlet channel is located on the bucket lid near the opening; or, the air inlet channel is located on the bucket body near the opening.

[0012] In one embodiment, the air inlet channel includes a first pipe segment and a second pipe segment connected sequentially along the fluid flow direction. The side wall plate where the side is located is defined as the second side wall plate. The first pipe segment is installed on the first side wall plate. At least a portion of the second pipe segment is located in the dust chamber and is located beside the outer contour line. An air outlet is opened on the peripheral wall of the second pipe segment. The air outlet has a first position facing the second side wall plate.

[0013] In one embodiment, the second pipe segment is arranged to rotate relative to the first pipe segment about its own axis, thereby allowing the air outlet to rotate from a second position to the first position. The separation assembly includes a filter cartridge located in the dust chamber, wherein when the air outlet is in the second position, the air outlet faces downward or toward the filter cartridge.

[0014] In one embodiment, the projected areas of the turbulent region and the circulating region on the first plane are A1 and A2, respectively, where A1 / A2 = 1 / (1~1.4).

[0015] In one embodiment, the boundary lines between the turbulent flow region and the circulating flow region are defined as a first boundary line and a second boundary line, respectively. The first boundary line, the second boundary line, and the second edge enclose the turbulent flow region. The extensions of the orthographic projections of the first boundary line and the second boundary line on the first plane intersect, and the intersection point is arranged close to the axis of the outer contour line. Both the first boundary line and the second boundary line are inclined lines that form an acute angle α with the second edge.

[0016] In one embodiment, each of the two side edges includes two opposing third edges and two opposing fourth edges, the two ends of the third edges being connected to the first edge and the fourth edge, respectively, and the length of the third edge is less than the length of the fourth edge. In one embodiment, the maximum distance between the first edge and the second edge is L1, and the maximum distance between the two side edges is L2, with distance L1 / L2 = (1~1.4):1.

[0017] In one embodiment, the separation assembly includes a filter cartridge, an air guide hood, and a fan. The air guide hood is installed on the bottom wall of the bucket lid, and the outer periphery of the orthographic projection of the air guide hood onto the first plane is the outer contour line. The fan is located within the space enclosed by the air guide hood and the bucket lid. The bottom end of the air guide hood has an air intake that communicates with the air inlet of the fan. The filter cartridge is disposed on the air guide hood and surrounds the air intake.

[0018] In one embodiment, the air guide shroud is a frustum-shaped structure with a cross-sectional area that gradually decreases from top to bottom.

[0019] Compared with the prior art, the vacuum cleaner provided in this application has the following advantages:

[0020] The high-speed rotating airflow entering the dust chamber through the inlet duct is relatively chaotic. When A > a, the space for airflow to enter the dust chamber after passing through the inlet duct is increased, reducing the possibility of dust particles being directly sucked away without being separated. This ensures that heavier particles are effectively separated and settled. Furthermore, it allows the chaotic airflow to expand more smoothly, avoiding the generation of violent eddies and reducing the accumulation of acoustic energy at the outlet of the inlet duct, thus helping to reduce noise. Since the minimum distance between the outer contour line and each intersection point, as well as between the outer contour line and the first edge, is 'a', the change in the space through which the airflow surrounds the separation component is relatively small. This helps to reduce the absolute velocity, decrease the velocity change during airflow, reduce the increase in relative pressure at corresponding positions on the inner wall of the barrel, and reduce the uneven distribution of acoustic energy generated when the airflow surrounds the separation component, thereby achieving a better noise reduction effect without reducing airflow. When A / a = 1.7~2.5, the accumulation of acoustic energy at the outlet of the inlet duct is reduced, subsequently lowering the absolute velocity of the airflow surrounding the filter cartridge, making the distribution of acoustic energy generated when the airflow surrounds the filter cartridge more uniform, achieving an even better noise reduction effect. When A / a is too high, it significantly slows down the airflow velocity at the outlet of the inlet duct. Although this reduces noise, it also reduces the airflow surrounding the filter cartridge, thus decreasing the separation capacity. When A / a is too low, acoustic energy accumulates at the outlet of the inlet duct, increasing noise. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of a vacuum cleaner according to an embodiment of this application;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 for Figure 1 A structural diagram with the rear portion of the barrel removed;

[0025] Figure 4 This is a top view of a vacuum cleaner according to an embodiment of this application after removing the lid and motor;

[0026] Figure 5 for Figure 4 Top view after removing the air intake duct;

[0027] Figure 6 This is a partial structural diagram of the vacuum cleaner in Example 1;

[0028] Figure 7 This is a top view of the barrel body and some of the separate components in Comparative Example 1.

[0029] Figure 8 This is a top view of the barrel body and some of the separate components in Comparative Example 2.

[0030] Figure 9 This is a partial structural diagram of the vacuum cleaner in Comparative Example 3;

[0031] Figure 10 This is the absolute velocity flow trajectory diagram for Example 5;

[0032] Figure 11 This is the absolute velocity isosurface plot of Example 5;

[0033] Figure 12 This is a relative pressure isosurface plot of Example 5;

[0034] Figure 13 Here is the acoustic energy level isosurface plot of Example 5;

[0035] Figure 14 The absolute velocity flow trace diagram is for Comparative Example 1.

[0036] Figure 15This is the isosurface plot of absolute velocity in Comparative Example 1;

[0037] Figure 16 This is a relative pressure isosurface plot for Comparative Example 1;

[0038] Figure 17 This is the acoustic energy level isosurface plot for Comparative Example 1;

[0039] Figure 18 The absolute velocity flow trace diagram is shown in Comparative Example 2.

[0040] Figure 19 This is the isosurface plot of absolute velocity in Comparative Example 2;

[0041] Figure 20 This is a relative pressure isosurface plot for Comparative Example 2;

[0042] Figure 21 This is the acoustic energy level isosurface plot for Comparative Example 2;

[0043] Figure 22 The absolute velocity flow trace diagram is shown in Comparative Example 3.

[0044] Figure 23 This is the isosurface plot of absolute velocity in Comparative Example 3;

[0045] Figure 24 This is a relative pressure isosurface plot for Comparative Example 3;

[0046] Figure 25 This is the acoustic energy level isosurface plot for Comparative Example 3;

[0047] Figure 26 This is an absolute velocity flow trajectory diagram of Example 1;

[0048] Figure 27 This is an isosurface plot of the absolute velocity in Example 1;

[0049] Figure 28 This is a relative pressure isosurface plot of Example 1;

[0050] Figure 29 This is the acoustic energy level isosurface diagram of Example 1.

[0051] Reference numerals: 1. Dust bin; 10. Dust chamber; 11. Bin body; 110. Opening; 1100. Side; 1101. First edge; 1102. Second edge; 1103. Third edge; 1104. Fourth edge; 1105. First plane; 1106. First point; 1107. Second point; 12. Bin lid; 13. Air inlet channel; 131. First pipe section; 1310. First section; 1311. First axis; 1312. Second section; 1 32. Second pipe section; 1320. Second axis; 1321. Air outlet; 14. Exhaust duct; 15. Airflow area; 151. Circulation area; 152. Turbulent area; 153. First dividing line; 154. Second dividing line; 16. First side wall panel; 17. Second side wall panel; 2. Separation assembly; 20. Outer contour line; 201. Shaft; 21. Filter cartridge; 22. Air guide hood; 221. Air intake; 23. Fan; 24. Motor; 3. Casters. Detailed Implementation

[0052] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0053] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0057] like Figures 1-6 As shown, this application provides a vacuum cleaner. The vacuum cleaner includes a dustbin 1, a separation component 2, and a fan 23. The dustbin 1 includes a body 11 with an opening 110 at the top and a lid 12 covering the opening 110. The body 11 and lid 12 together form a dust chamber 10. The dustbin 1 has an air inlet channel 13 and an air outlet channel 14 communicating with the dust chamber 10. The separation component 2 is installed on the lid 12, and at least a portion of the separation component 2 is located within the dust chamber 10. Along the airflow (fluid) path, the separation component 2 is located upstream of the exhaust channel 14. Specifically, the separation component 2 can enter the dust chamber 10 through the opening 110.

[0058] like Figure 2As shown, the separation component 2 is used to separate at least a mixture of air and dust. The separation component 2 includes a filter cartridge 21, an air guide shroud 22, and a fan 23. The air guide shroud 22 is installed on the inner bottom wall of the lid 12. The fan 23 is located within the space enclosed by the air guide shroud 22 and the lid 12, and rotates under the drive of a motor 24, which is located above the fan 23. The bottom end of the air guide shroud 22 has an air intake 221 that communicates with the air inlet of the fan 23. The filter cartridge 21 is disposed on the air guide shroud 22 and arranged vertically, surrounding the air intake 221. The filter cartridge 21 has a circular cross-section, and its bottom wall is a closed end. Along the airflow path, the fan 23 is located downstream of the filter cartridge 21 and upstream of the exhaust duct 14.

[0059] like Figure 2 As shown, the above-mentioned air guide hood 22 is a frustum shape with a cross-sectional area that gradually decreases from top to bottom. Therefore, the outer peripheral surface of the air guide hood 22 will guide the fluid in the dust chamber 10 downward, so that the fluid flows around the peripheral wall of the filter cartridge 21.

[0060] Understandably, after the fluid enters the dust chamber through the air inlet channel 13, the fluid moves around the peripheral wall of the filter cartridge 21. The airflow filtered by the peripheral wall of the filter cartridge 21 enters the air guide hood 22 through the air inlet 221. Under the guiding effect of the inner peripheral surface of the air guide hood 22, it enters the fan 23 and is discharged through the air outlet of the fan 23 and the exhaust channel 14 in sequence.

[0061] It should be noted that the air inlet channel 13 is located on the lid 12 near the opening 110; or, the air inlet channel 13 is located on the body 11 near the opening 110.

[0062] like Figure 2 As shown, the air inlet channel 13 includes a first pipe section 131 and a second pipe section 132. Along the fluid flow direction within the air inlet channel 13, the second pipe section 132 is located downstream of the first pipe section 131. The side wall of the dust bin 1 corresponding to the second edge 1102 is the first side wall panel 16, that is, the second edge 1102 is located on the first side wall panel 16. The side wall of the dust bin corresponding to the side edge 1100 is the second side wall panel 17, that is, the side edge 1100 is located on the second side wall panel 17. The first pipe section 131 is installed on the first side wall panel 16, that is, the air inlet channel 13 is installed on the first side wall panel 16. At least a portion of the second pipe section 132 is located within the dust chamber 10 and is situated beside the outer contour line 20 described below. An air outlet 1321 is provided on the peripheral wall of the second pipe section 132, and the air outlet 1321 has a first position facing the second side wall panel 17. In this way, the high-speed airflow flowing out through the air outlet 1321 can be blown out along the side wall of the dust bin 1, forming a high-speed rotating airflow inside the dust chamber 10.

[0063] Furthermore, the second pipe section 132 is arranged to rotate relative to the first pipe section 131 about its own axis, thereby allowing the air outlet 1321 to rotate from a second position to a first position. The axis of the second pipe section 132 is defined as the second axis 1320. When the air outlet 1321 is in the second position, it faces downwards or towards the filter cartridge 21. Thus, by rotating the second pipe section 132 about the second axis 1320, the circumferential position of the air outlet 1321 can be adjusted, thereby better generating a high-speed rotating airflow within the dust chamber 10 while reducing sharp turns and sudden changes in flow direction, thereby reducing energy loss of the airflow within the dust chamber 10.

[0064] In one embodiment, such as Figure 2 As shown, the first pipe section 131 is basically L-shaped and includes a first section 1310 installed on the lid 12 and a vertically arranged second section 1312. The first section 1310 is installed on the first side wall plate 16 of the dust bin 1. The second pipe section 132 is arranged vertically and installed on the second section 1312. Both the second pipe section 132 and the second section 1312 are located in the dust chamber 10. The second pipe section 132 rotates relative to the second section 1312 around its own second axis 1320.

[0065] like Figure 13 As shown, the rotation angle of the air outlet 1321 from the second position to the first position is γ, where γ satisfies: 0 < γ ≤ 50°. In one embodiment, γ can be 30° or 45°. In this embodiment, γ = 50°.

[0066] In addition, casters 3 are provided at the bottom of the vacuum cleaner body 11 for easy movement.

[0067] In this embodiment, such as Figure 4 and Figure 5 As shown, the opening 110 is hexagonal, and its inner periphery includes a first edge 1101, a second edge 1102, and two side edges 1100. The first edge 1101 and the second edge 1102 are arranged at intervals relative to each other, and the two side edges 1100 are arranged at intervals relative to each other along the length of the first edge 1101. The air inlet channel 13 is located on the first side wall panel 16 of the dust bin 1. The plane containing the opening 110 is designated as the first plane 1105, and the outer periphery of the orthographic projection of the separation assembly 2 onto the first plane 1105 is defined as the outer contour line 20. In this embodiment, as... Figures 2-5 As shown, the outer periphery of the orthographic projection of the air guide shroud 22 onto the first plane 1105 is the aforementioned outer contour line 20. The minimum distance between the outer contour line 20 and the first edge 1101 and the two side edges 1100 is equal or substantially equal, and both are 'a'. The minimum distance between the outer periphery of the separation component 2 and the second edge 1102 is 'A', where A / a = 1.7~2.5.

[0068] It should be noted that "the minimum distance between the outer contour line 20 and the first edge 1101 and the two side edges 1100" includes: the minimum distance between the corresponding position of the first edge 1101 and the outer contour line 20 is 'a', and the minimum distance between the corresponding position of the two first side edges and the outer contour line 20 is also 'a'. See details... Figure 5 As shown. "Basically equal" means that the dimensions differ by about 1mm.

[0069] It is understandable that the high-speed rotating airflow entering the dust chamber 10 through the air inlet channel 13 is relatively chaotic. When A > a, it increases the space for the airflow to enter the dust chamber 10 after passing through the air inlet channel 13, reduces the possibility of dust particles being directly sucked away without being separated, ensures that the heavier particles are effectively separated and settled, and makes the chaotic airflow expand more smoothly, avoids the generation of violent eddies in the chaotic airflow, slows down the accumulation of sound energy at the outlet of the air inlet channel 13, and helps to reduce noise, that is, reduces the relative pressure and sound energy value of the turbulent area at the outlet of the air inlet channel 13. Since the minimum distance between the outer contour line 20 and the two side edges 1100 and the first edge 1101 is 'a', it is possible to ensure that the fluid cross-sectional area changes as little as possible around the space surrounding the filter cartridge, that is, the change in the space through which the airflow surrounds the separation component 2 is relatively small. This is beneficial to reduce the absolute flow velocity and reduce the velocity change when the airflow passes through, making the flow velocity around the circulation zone 151 more stable and uniform, reducing the increase in relative pressure at the corresponding position on the inner wall of the barrel 11, and also helping to reduce the uneven distribution of sound energy generated when the airflow surrounds the separation component 2, thereby achieving a better noise reduction effect without reducing the airflow.

[0070] When A / a = 1.7~2.5, the accumulation of acoustic energy at the outlet of the air inlet channel 13 is reduced. Simultaneously, it prevents a sudden increase in fluid velocity from the filter cartridge 21 drawn in from the side of the separation component 2 away from the air inlet channel 13, thus avoiding uneven fluid velocity distribution and indirectly causing acoustic energy concentration at that location. This reduces the absolute velocity of the airflow around the separation component 2, resulting in a more uniform distribution of acoustic energy and better noise reduction. When A / a is too large (e.g., greater than 2.5), the airflow velocity at the outlet of the air inlet channel 13 is greatly reduced. While this reduces noise, it also reduces the airflow around the separation component 2, decreasing separation capacity. When A / a is too small (e.g., less than 1.7), acoustic energy accumulates at the outlet of the air inlet channel 13, increasing noise. The hexagonal shape of the opening 110 minimizes the change in fluid flow area around the separation component 2, resulting in a more stable fluid velocity and reducing acoustic energy caused by fluid movement within the barrel 11.

[0071] Furthermore, such as Figure 4 and Figure 5As shown, the two side edges 100 include two oppositely arranged third edges 1103 and two oppositely arranged fourth edges 1104. The two ends of the third edges 1103 are connected to the first edge 1101 and the fourth edge 1104 respectively, and the length of the third edge 1103 is less than the length of the fourth edge 1104. Thus, the fluid entering through the air inlet channel 13 moves along the side wall plate corresponding to the fourth edge 1104, further reducing the acoustic energy accumulation at the outlet of the air inlet channel 13, while allowing the airflow to flow more gently around the filter cartridge 21. It should be noted that the outlet of the air inlet channel 13 is the air outlet 1321.

[0072] In this embodiment, any two adjacent sidewalls of the barrel body 11 are smoothly connected. Similarly, any two adjacent edges of the inner periphery of the opening 110 are also smoothly connected. This allows the airflow to flow more smoothly along the inner periphery of the barrel body 11, which helps reduce noise.

[0073] Specifically, such as Figure 5 As shown, the maximum distance between the first edge 1101 and the second edge 1102 is L1, and the maximum distance between the two sides 1100 is L2, with a distance L1 / L2 = (1~1.4):1. It can be understood that because the air inlet channel 13 is arranged close to the second edge 1102, when L1 / L2 = (1~1.4):1, it is convenient to increase the space at the outlet of the air inlet channel 13 while ensuring the flow space around the separation component 2. This further allows the turbulent airflow to expand more smoothly, reduces the accumulation of acoustic energy at the outlet of the air inlet channel 13, and subsequently reduces the absolute velocity of the airflow around the separation component 2, making the distribution of acoustic energy generated when the airflow around the separation component 2 more uniform, thus achieving a better noise reduction effect.

[0074] It should be noted that "air inlet channel 13 is at the outlet" means "air inlet channel 13 is at air outlet 1321".

[0075] The points on the two sides 1100 closest to the outer contour line 20 are defined as the first point 1106 and the second point 1107, respectively. The spacing a = 67mm~68mm, as shown above. Figure 5 As shown, L1 = 415mm, L2 = 337mm, therefore, L1 / L2 = 1.23. For illustrative purposes, L1 / L2 could also be 1 or 1.4.

[0076] In Example 1, as Figure 5As shown, the minimum distance 'a' between the outer contour line 20 and the first edge 1101 is 67 mm, the minimum distance 'a' between the first point 1106 and the outer contour line 20 is 68 mm, and the minimum distance 'a' between the second point 1107 and the outer contour line 20 is also 68 mm. The minimum distance 'A' between the outer contour line 20 and the second edge 1102 is 150 mm. In this case, A / a = 2.24, or A / a = 2.2. In this embodiment 1, the air inlet channel 13 is described below. Figure 6 As shown, the first pipe section 131 and the second pipe section 132 of the air inlet channel 13 are arranged coaxially, and the air outlet 1321 faces downward, that is, the air outlet 1321 is in the second position.

[0077] In embodiment 2, the minimum distance a between the outer contour line 20 and the first edge 1101 is 67.5 mm, and the minimum distance between the outer contour line 20 and the second edge 1102 is 135 mm, that is, A / a=2.

[0078] In embodiment 3, the minimum distance between the first edge 1101, the first point 1106 and the second point 1107 and the outer contour line 20 is 68mm, and the minimum distance between the outer contour line 20 and the second edge 1102 is 150mm.

[0079] In embodiment 4, the minimum distance between the first edge 1101, the first point 1106 and the second point 1107 and the outer contour line 20 is 88mm or 60mm, the minimum distance between the outer contour line 20 and the second edge 1102 is 150mm, and A / a = 1.7 or 2.5.

[0080] It should be noted that in the above embodiments, the size of the outer contour line 20 is equal to the size of the outer contour line 20 of the existing separation component 2. Furthermore, the air outlets 1321 all face downwards, i.e., they are all in the second position.

[0081] The difference between Embodiment 5 of this application and Embodiment 1 above lies only in the structure of the air inlet channel 13. Specifically, for the structure of the air inlet channel 13, please refer to [link to Embodiment 5]. Figure 2 and Figure 3 The air inlet duct 13 shown has an air outlet 1321 facing the second side wall panel 17.

[0082] like Figure 2 , Figure 4 and Figure 5As shown, an airflow region 15 is formed between the outer peripheral wall of the upper region of the separation component 2 and the inner peripheral wall of the barrel 11. The airflow region 15 is divided into a circulation region 151 and a turbulent region 152 along the circumference of the separation component 2. The turbulent region 152 is located on the side where the air inlet channel 13 is located, and is located between the axis 201 and the second edge 1102 of the outer contour line 20. Thus, since A > a, the space of the turbulent region 152 is increased, the degree of turbulence of the chaotic airflow in the turbulent region 152 is reduced, and the sound energy accumulation at the outlet of the air inlet channel 13 is slowed down. When the chaotic airflow flows into the circulation region 151, the flow trajectory is more regular, which helps to reduce the uneven distribution of sound energy generated when the airflow surrounds the separation component 2, thereby achieving a better noise reduction effect without reducing the airflow.

[0083] It should be noted that when fluid enters the dust chamber 10 through the air inlet channel 13, the aforementioned turbulent flow zone 152 and circulating flow zone 151 will be formed at the top of the dust chamber 10.

[0084] Furthermore, the boundary lines between the turbulent flow region 152 and the circulation region 151 are defined as the first boundary line 153 and the second boundary line 154, respectively. The first boundary line 153, the second boundary line 154, and the second edge 1102 enclose the turbulent flow region 152. The extension lines of the first boundary line 153 and the second boundary line 154 intersect the orthographic projection of the first plane 1105, and the intersection point is arranged close to the axis 201 of the outer contour line 20. The first boundary line 153 and the second boundary line 154 are both inclined lines that form an acute angle α with the second edge 1102.

[0085] It is understandable that since both the first dividing line 153 and the second dividing line 154 are inclined lines, a guiding slope is formed between the turbulent flow zone 152 and the circulation zone 151. The existence of the guiding slope makes the fluid movement that rubs against the circumference of the barrel 11 have a clear dividing trajectory, which plays a role in releasing pressure in the turbulent flow zone 152 and reversing airflow, as well as reversing airflow from the turbulent flow zone 152 into the circulation zone 151, thus expanding the space for the flow from the turbulent flow zone 152 to the circulation zone 151. The longer turbulence zone 152 increases its volume, which can release the positive pressure in the turbulence zone 152 to a certain extent, enhance the vacuum cleaner's suction efficiency, and at the same time ensure that the fluid cross-sectional area around the filter cartridge changes as little as possible. In this way, strong turbulence in the turbulence zone 152 can be avoided from affecting the directional rotation of the airflow, while the rotating airflow can move around the filter cartridge 21 in an orderly and stable manner at high speed. This makes the sound energy generated when the airflow surrounds the filter cartridge 21 relatively uniformly distributed, reducing the sound energy caused by the fluid movement inside the barrel 11.

[0086] Furthermore, the projected areas of the aforementioned turbulent flow zone 152 and circulating flow zone 151 on the first plane 1105 are A1 (not shown) and A2 (not shown), respectively, with A1 / A2 = 1 / (1~1.4). Thus, within the entire airflow region 15, the projected area of ​​the turbulent flow zone 152 is close to that of the circulating flow zone 151, ensuring a larger turbulent flow zone 152. This allows the turbulent airflow entering through the inlet channel 13 to expand more smoothly, reducing the accumulation of acoustic energy at the outlet of the inlet channel 13. Consequently, it reduces the absolute velocity of the airflow surrounding the filter cartridge 21, resulting in a more uniform distribution of acoustic energy generated when the airflow surrounds the filter cartridge 21, achieving a better noise reduction effect. In this embodiment, A1 / A2 = 1 / 1.27. Illustratively, A1 / A2 = 1, A1 / A2 = 1 / 1.4.

[0087] It should be noted that the acute angle α mentioned above can be 45°.

[0088] In this embodiment, the axis of the first segment 1310 is defined as the first axis 1311, and the distance between the first axis 1311 and the first dividing line 153 and the distance between the first axis 1311 and the second dividing line 154 are equal. In this way, the turbulent airflow in the turbulent flow zone 152 can be expanded more smoothly, avoiding the generation of violent eddies in the turbulent airflow, reducing the accumulation of acoustic energy at the outlet of the air intake channel 13, and thus helping to reduce noise.

[0089] Comparative Example 1:

[0090] like Figure 7 As shown, Comparative Example 1 has the same length L1 as Embodiment 1. Specifically, the minimum distance a between the outer contour line 20 and the first edge 1101 is 67 mm, and the minimum distance A between the outer contour line 20 and the second edge 1102 is 150 mm. Compared to Embodiment 1, the size L2 of Comparative Example 1 is reduced. Specifically, the minimum distance a between the first point 1106 and the second point 1107 and the outer contour line 20 is 51 mm.

[0091] Comparative Example 2:

[0092] like Figure 8 As shown, Comparative Example 2 has the same length L2 as Embodiment 1 above. Specifically, the minimum distance a between the first point 1106 and the second point 1107 and the outer contour line 20 is 68mm. Comparative Example 2 also has the same length L1 as Embodiment 1 above, except that the separating component 2 moves closer to the first edge, that is, the minimum distance a between the outer contour line 20 and the first edge 1101 is 42mm, and the minimum distance A between the outer contour line 20 and the second edge 1102 is 175mm.

[0093] It should be noted that the shape and size of the separation components in Embodiment 1, Comparative Example 1 and Comparative Example 2 are exactly the same, and the setting position (height) and structure of the air inlet channel are also exactly the same, that is, the air outlet 1321 is in the second position.

[0094] Comparative Example 3:

[0095] like Figure 9 As shown, the only difference between Comparative Example 3 and the above-mentioned Example 5 is that the air outlet 1321 is in the second position, specifically, the air outlet 1321 faces the filter cartridge 21.

[0096] See Figures 10-29 As shown, CFD (Computational Fluid Dynamics) simulations were performed on Examples 1, 5, and Comparative Examples 1 to 3.

[0097] Depend on Figure 10 and Figure 11 It can be seen that the maximum absolute velocity of the fluid in the dust chamber 10 of Example 5 is 29.873 m / s; from Figure 12 It can be seen that the minimum relative pressure in the dust chamber 10 of Example 5 is -1046.64 Pa; from Figure 13 It can be seen that the acoustic energy (i.e., sound energy) in the dust chamber 10 of Example 5 is 23.38 dB.

[0098] Depend on Figure 26 and Figure 27 It can be seen that the maximum absolute velocity of the internal fluid in the dust chamber 10 of Example 1 is 30.545 m / s; from Figure 28 It can be seen that the minimum relative pressure in dust chamber 10 of Example 1 is -1025.78 Pa; from Figure 29 It can be seen that the maximum acoustic energy in the dust chamber 10 of Example 1 is 29.81 dB.

[0099] Depend on Figure 14 and Figure 15 It can be seen that the maximum absolute velocity inside dust chamber 10 in Comparative Example 1 is 31.342 m / s. From... Figure 16 It can be seen that the minimum relative pressure inside the dust chamber 10 of Comparative Example 1 is -1100.21 Pa. Figure 17 It can be seen that the acoustic energy in the dust chamber 10 of Comparative Example 1 is 3.81dB~41.86dB.

[0100] Depend on Figure 18 and Figure 19 It can be seen that the maximum absolute velocity inside dust chamber 10 in Comparative Example 2 is 32.043 m / s. From... Figure 20 It can be seen that the minimum relative pressure inside the dust chamber 10 of Comparative Example 2 is -1008.43 Pa. Figure 21 It can be seen that the acoustic energy in the dust chamber 10 of Comparative Example 2 is 4.82dB~43.37dB.

[0101] Depend on Figure 22 and Figure 23 It can be seen that the maximum absolute velocity of the fluid in dustbin 1 of Comparative Example 3 is 25.751 m / s; from Figure 24 It can be seen that the minimum relative pressure inside dustbin 1 in Comparative Example 3 is -999.7 Pa; from Figure 25 It can be seen that the maximum sound energy in the dustbin 1 of Comparative Example 3 is 52.85 dB.

[0102] Compared with Comparative Example 1, the sound energy in Embodiment 1 of this application is reduced by 12.05 dB; compared with Comparative Example 2, the sound energy is reduced by 13.56 dB; compared with Comparative Example 3, the maximum sound energy in Embodiment 5 of this application is reduced by 29.47 dB, with lower relative pressure and better suction. That is, adjusting the circumferential position of the air outlet 1321 can achieve the purpose of noise reduction.

[0103] In summary, when meeting the maximum flow rate requirement (approximately 0.04 m³ / s, with an external environment of 1 atm), the four sets of maximum flow velocities (the maximum absolute velocity) should be similar (e.g., maximum difference ≤ 3.5 m / s), and the relative negative pressure (i.e., relative pressure) on the inner wall of the barrel 11 should be similar (e.g., maximum difference ≤ 65.4 Pa). However, the acoustic energy in the dust chamber 10 in Example 1 is 2.71 dB~29.81 dB, the acoustic energy in the dust chamber 10 in Example 5 is 2.13 dB~23.38 dB, the acoustic energy in the dust chamber 10 in Comparative Example 1 is 3.81~41.86 dB, and the acoustic energy in the dust chamber 10 in Comparative Example 2 is 4.82 dB~43.37 dB. The acoustic energy in the dust chamber 10 of Comparative Example 3 was 5.87dB~52.85dB. Obviously, the maximum acoustic energy of Examples 1 and 5 was lower than that of the comparative examples, the noise was lower, and a better noise reduction effect was achieved.

[0104] It should be noted that, Figures 10-29 In the figure, X, Y, and Z are coordinate systems, C is the origin of the coordinate system (not shown), and XC, YC, and ZC are the three directions in the coordinate system.

[0105] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A dust collector comprising: a dust bin comprising a bin body with an open top and a bin cover covering the open top, the bin body and the bin cover enclosing a dust chamber, the dust bin being provided with an air inlet channel and an air outlet channel in communication with the dust chamber, the air inlet channel being provided on a first side wall plate of the dust bin; a separation assembly mounted on the bin cover, at least part of the separation assembly being located in the dust chamber and along an air flow path, the separation assembly being located upstream of the air outlet channel; characterized in that the open top is hexagonal, an inner periphery of the open top comprises a first edge, a second edge and two side edges arranged opposite to each other along a length direction of the first edge, the second edge being located on the first side wall plate, a plane in which the open top is located is defined as a first plane, an outer periphery of a normal projection of the separation assembly on the first plane is defined as an outer contour line, a minimum distance between the outer contour line and the first edge and a minimum distance between the outer contour line and the two side edges are equal or substantially equal and are both a, and a minimum distance between an outer periphery of the separation assembly and the second edge is A, A / a = 1.7-2.

5.

2. The dustsucker according to claim 1, characterized in that, Any two adjacent side wall plates of the bin body are connected in a smooth transition.

3. The dustsucker according to claim 2, characterized in that, An air flow region is formed between an outer peripheral wall of an upper region of the separation assembly and an inner peripheral wall of the bin body, the air flow region is sequentially divided into a circular flow region and a turbulent flow region along a circumferential direction of the separation assembly, the turbulent flow region is located on a side where the air inlet channel is located and between an axis of the outer contour line and the second edge.

4. The dustsucker according to claim 3, characterized in that, The air inlet channel is arranged at a position of the bin cover close to the open top, or the air inlet channel is arranged at a position of the bin body close to the open top.

5. The dust cup according to claim 4, wherein The air inlet channel comprises a first pipe segment and a second pipe segment connected in sequence along a fluid flow direction, a side wall plate in which the side edges are located is defined as a second side wall plate, the first pipe segment is mounted on the first side wall plate, at least part of the second pipe segment is arranged in the dust chamber and located on a side of the outer contour line, an air outlet is formed on a peripheral wall of the second pipe segment, the air outlet has a first position facing the second side wall plate.

6. The dust cup according to claim 5, wherein The second pipe segment is arranged to rotate about an axis thereof relative to the first pipe segment, so that the air outlet can rotate from a second position to the first position, the separation assembly comprises a filter cartridge located in the dust chamber, when the air outlet is in the second position, the air outlet faces downward or the filter cartridge.

7. The dust cup according to claim 3, wherein Projections of the turbulent flow region and the circular flow region on the first plane have areas A1 and A2 respectively, A1 / A2 = 1 / (1-1.4).

8. The dust cup according to claim 3, wherein A boundary line of the turbulent flow region and the circular flow region is defined as a first boundary line and a second boundary line respectively, the first boundary line and the second boundary line and the second edge enclose the turbulent flow region, an extension line of normal projections of the first boundary line and the second boundary line on the first plane intersects, and an intersection point is arranged close to an axis of the outer contour line, the first boundary line and the second boundary line are both inclined lines with an acute angle a with the second edge.

9. The dust cup according to claim 1, wherein Both of the side edges comprise a third edge and a fourth edge, two ends of the third edge are connected with the first edge and the fourth edge respectively, and the length of the third edge is less than the length of the fourth edge.

10. The dust cup according to claim 1, wherein The maximum distance between the first edge and the second edge is L1, the maximum distance between the two side edges is L2, and the distance L1 / L2=1~1.

4.

11. The dustsucker according to any one of claims 1 to 10, characterized in that, The separation assembly comprises a filter cartridge, a wind guide cover and a fan, the wind guide cover is installed on the bottom wall of the bucket cover, the outer periphery of the orthographic projection of the wind guide cover on the first plane is the outer contour line, the fan is located in the space enclosed by the wind guide cover and the bucket cover, the bottom end of the wind guide cover has a suction port in communication with the air inlet of the fan, and the filter cartridge is arranged on the wind guide cover and surrounds the periphery of the suction port.

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