Dust collector

Abstract

The dust collector comprises a dust barrel, and the dust barrel is provided with an air inlet channel and an air exhaust channel which are communicated with a dust chamber; the separation assembly is mounted on the barrel cover, and at least part of the separation assembly is located in the dust chamber; the opening is hexagonal, the inner periphery of the opening comprises a first edge, a second edge and two side edges, the first edge and the second edge are oppositely arranged at intervals, the two side edges are oppositely arranged at intervals in the length direction of the first edge, and the air inlet channel is arranged on a first side wall plate of the dust barrel. The outer periphery of the orthographic projection of the separation assembly on the first plane is defined as an outer contour line, the outer contour line is equal to or basically equal to the minimum distance between the first edge and the two side edges and is a, the minimum distance between the outer contour line and the second edge is A, and A / a = 1.7-2.5. And the non-uniform distribution of sound energy generated when the airflow surrounds the separation assembly is reduced, so that a relatively good noise reduction effect is achieved while the airflow is not reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a dust collector. BACKGROUND

[0002] The dust collector is an electric appliance for cleaning dust and sundries on the ground.

[0003] The dust collector currently generally comprises a dust bucket, a motor, a fan and a filter element. The dust bucket comprises a bucket body provided with an open top and a bucket cover covering the open top. The bucket body and the bucket cover form a dust chamber. The filter element is arranged in the dust chamber and is mounted on the bucket cover together with the motor and the fan. When the dust collector is started, the motor drives the fan to rotate. The fan generates negative pressure in the dust bucket, so that dust or sundries on the ground to be cleaned are sucked into the dust bucket through the suction head and then filtered by the filter element in the dust bucket. Clean air is discharged through the air outlet.

[0004] The existing dust collector generates a large amount of noise when working, which affects the user experience. At present, a noise-absorbing sponge is usually used to achieve the purpose of noise reduction or sound elimination. However, the noise-absorbing sponge is easy to absorb dust and breed bacteria, which produces odor and is difficult to clean. In addition, the noise-absorbing sponge is usually arranged near the motor. During high-speed operation of the motor, the sponge may be ignited, which poses a safety hazard. SUMMARY

[0005] Therefore, it is necessary to provide a safe and reliable dust collector that achieves the purpose of noise reduction.

[0006] The present application provides a dust collector, comprising:

[0007] The dust bucket comprises a bucket body provided with an open top and a bucket cover covering the open top. The bucket body and the bucket cover form a dust chamber. The dust bucket is provided with an air inlet channel and an air outlet channel which are in communication with the dust chamber. The air inlet channel is arranged on a first side wall plate of the dust bucket.

[0008] The separation assembly is mounted on the bucket cover. At least part of the separation assembly is located in the dust chamber. Along the airflow flow path, the separation assembly is located upstream of the air outlet channel. The opening is hexagonal. The inner periphery of the opening comprises a first edge, a second edge and two side edges which are arranged opposite to each other along the length direction of the first edge. The second edge is located on the first side wall plate. A plane on which the opening is located is defined as a first plane. The outer periphery of the orthographic projection of the separation assembly on the first plane is defined as an 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 to a, and the minimum distance between the outer periphery of the separation assembly and the second edge is A. A / a is 1.7-2.5.

[0009] In one of the embodiments, the circumferential wall of the barrel body is connected to any two adjacent side wall plates in a smooth transition.

[0010] In one of the embodiments, an airflow area is formed between the outer circumferential wall of the upper region of the separating assembly and the inner circumferential wall of the barrel body, the airflow area is sequentially divided into a cyclone region and a turbulent region along the circumference of the separating assembly, the turbulent region is located at 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 of the embodiments, the air inlet channel is arranged at the barrel cover close to the opening; or, the air inlet channel is arranged at the barrel body close to the opening.

[0012] In one of the embodiments, the air inlet channel comprises a first pipe segment and a second pipe segment connected in sequence along the fluid flow direction, the side wall plate where the side edge is located is defined as a second side wall plate, the first pipe segment is installed on the first side wall plate, at least part of the second pipe segment is arranged in the dust chamber and located at the side of the outer contour line, the circumferential wall of the second pipe segment is provided with an air outlet, and the air outlet has a first position facing the second side wall plate.

[0013] In one of the embodiments, the second pipe segment is arranged to rotate around its own axis relative to the first pipe segment, so that the air outlet can rotate from a second position to the first position, and the separating assembly comprises a filter cartridge arranged in the dust chamber, when the air outlet is at the second position, the air outlet faces downward or the filter cartridge.

[0014] In one of the embodiments, the projection areas of the turbulent region and the cyclone region on the first plane are A1 and A2 respectively, and A1 / A2 = 1 / (1~1.4).

[0015] In one of the embodiments, the dividing lines of the turbulent region and the cyclone region are defined as a first dividing line and a second dividing line respectively, the first dividing line and the second dividing line and the second edge enclose the turbulent region, the extension lines of the normal projections of the first dividing line and the second dividing line on the first plane intersect, and the intersection point is arranged close to the axis of the outer contour line, and the first dividing line and the second dividing line are both inclined lines with an acute angle α with the second edge.

[0016] In one of the embodiments, each of the two side edges comprises two oppositely arranged third edges and two oppositely arranged fourth edges, the two ends of the third edges are connected with the first edges and the fourth edges respectively, and the length of the third edges is smaller than that of the fourth edges. In one of the embodiments, the maximum distance between the first edge and the second edge is L1, and the maximum distance between the two side edges is L2, and the distance L1 / L2=(1~1.4):1.

[0017] In one of the embodiments, the separating 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.

[0018] In one of the embodiments, the wind guide cover is in the shape of a circular truncated cone with the cross-sectional area gradually decreasing from top to bottom.

[0019] Compared with the prior art, the dust collector provided by the application has the following advantages:

[0020] The high-speed rotating airflow entering the dust chamber through the air inlet channel is relatively chaotic, when A>a, the space for the airflow entering the dust chamber after passing through the air inlet channel is increased, the possibility of dust particles not being separated and being directly sucked away is reduced, the particles with large specific gravity are effectively separated and settled, and the chaotic airflow is more smoothly expanded, the turbulent vortex of the chaotic airflow is avoided, the sound energy aggregation of the air inlet channel at the outlet is slowed down, and the noise is reduced. Since the minimum distance between the outer contour line and each intersection point and between the first edge is a, the change of the passing space of the airflow around the separating assembly is small, the absolute flow rate is reduced, the flow rate change when the airflow passes through is reduced, the increase of the relative pressure at the corresponding position of the inner wall of the bucket body is reduced, and the uneven distribution of the sound energy generated when the airflow surrounds the separating assembly is reduced, so that a good noise reduction effect is achieved without reducing the airflow. When A / a=1.7~2.5, the sound energy aggregation of the air inlet channel at the outlet is slowed down, the absolute flow rate of the airflow around the filter cartridge is subsequently reduced, the distribution of the sound energy generated when the airflow surrounds the filter cartridge is more uniform, and a better noise reduction effect is achieved. When A / a is too large, the airflow speed of the air inlet channel at the outlet is greatly slowed down, the noise is reduced, but the airflow around the filter cartridge is reduced, and the separation capacity is reduced. When A / a is too small, the sound energy aggregation of the air inlet channel at the outlet is increased, and the noise is increased. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0022] Figure 1 A perspective view of a dust collector according to an embodiment of the present application;

[0023] Figure 2 A sectional view of Figure 1

[0024] Figure 3 A partial structural schematic diagram of Figure 1

[0025] Figure 4 A top view of a dust collector according to an embodiment of the present application with a barrel cover and a motor removed;

[0026] Figure 5 A top view of Figure 4

[0027] Figure 6 A partial structural schematic diagram of a dust collector according to embodiment 1;

[0028] Figure 7 A top view of a barrel body and a partial separated assembly cooperating according to comparative example 1;

[0029] Figure 8 A top view of a barrel body and a partial separated assembly cooperating according to comparative example 2;

[0030] Figure 9 A partial structural schematic diagram of a dust collector according to comparative example 3;

[0031] Figure 10 An absolute velocity flow trace diagram of embodiment 5;

[0032] Figure 11 An absolute velocity contour diagram of embodiment 5;

[0033] Figure 12 A relative pressure contour diagram of embodiment 5;

[0034] Figure 13 An acoustic energy level contour diagram of embodiment 5;

[0035] Figure 14 An absolute velocity flow trace diagram of comparative example 1;

[0036] Figure 15 ​​​Absolute velocity streamlines plot for Comparative Example 1;

[0037] Figure 16 Relative pressure contour plot for Comparative Example 1;

[0038] Figure 17 Acoustic energy level contour plot for Comparative Example 1;

[0039] Figure 18 Absolute velocity streamlines plot for Comparative Example 2;

[0040] Figure 19 Absolute velocity contour plot for Comparative Example 2;

[0041] Figure 20 Relative pressure contour plot for Comparative Example 2;

[0042] Figure 21 Acoustic energy level contour plot for Comparative Example 2;

[0043] Figure 22 Absolute velocity streamlines plot for Comparative Example 3;

[0044] Figure 23 Absolute velocity contour plot for Comparative Example 3;

[0045] Figure 24 Relative pressure contour plot for Comparative Example 3;

[0046] Figure 25 Acoustic energy level contour plot for Comparative Example 3;

[0047] Figure 26 Absolute velocity streamlines plot for Example 1;

[0048] Figure 27 Absolute velocity contour plot for Example 1;

[0049] Figure 28 Relative pressure contour plot for Example 1;

[0050] Figure 29 Acoustic energy level contour plot for Example 1.

[0051] Reference numerals: 1, dust bucket; 10, dust chamber; 11, bucket body; 110, open mouth; 1100, side edge; 1101, first edge; 1102, second edge; 1103, third edge; 1104, fourth edge; 1105, first plane; 1106, first point; 1107, second point; 12, bucket cover; 13, air inlet channel; 131, first pipe section; 1310, first section; 1311, first axis; 1312, second section; 132, second pipe section; 1320, second axis; 1321, air outlet; 14, air outlet channel; 15, air flow area; 151, circular flow area; 152, turbulent flow area; 153, first demarcation line; 154, second demarcation line; 16, first side wall plate; 17, second side wall plate; 2, separation assembly; 20, outer contour line; 201, shaft center; 21, filter cartridge; 22, air scoop; 221, air inlet; 23, fan; 24, motor; 3, caster. DETAILED DESCRIPTION

[0052] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than the embodiments described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0053] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", "side", "top", "bottom" and similar terms used in the description of the present application are used only to describe various example structural parts and elements of the present application, and are used only for the purpose of convenience of explanation, and are determined based on the example orientation shown in the drawings, and do not mean the only embodiment. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating the direction are used only for the purpose of explanation and should not be considered as limiting, such as "upper" and "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0054] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0055] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of a first feature to a second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of a first feature to a second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The "under", "below" and "under" of a first feature to a second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0056] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0057] As shown in Figures 1-6 The present application provides a dust collector. The dust collector comprises a dust bucket 1, a separation assembly 2 and a fan 23. The dust bucket 1 comprises a bucket body 11 with an open top 110 and a bucket cover 12 covering the open top 110, the bucket body 11 and the bucket cover 12 form a dust chamber 10, and the dust bucket 1 is provided with an air inlet channel 13 and an air outlet channel 14 in communication with the dust chamber 10. The separation assembly 2 is installed on the bucket cover 12, and at least part of the separation assembly 2 is located in the dust chamber 10. Along the airflow (fluid) flow path, the separation assembly 2 is located upstream of the air outlet channel 14. Specifically, the separation assembly 2 can enter the dust chamber 10 through the open top 110.

[0058] As shown in Figure 2As shown, the separation assembly 2 is used to separate the mixture of air and dust, and comprises a filter cartridge 21, a wind guide 22 and a fan 23. The wind guide 22 is installed on the inner bottom wall of the lid 12. The fan 23 is located in the space enclosed by the wind guide 22 and the lid 12, and rotates under the drive of a motor 24 located above the fan 23. The bottom end of the wind guide 22 has a suction port 221 connected to the air inlet of the fan 23. The filter cartridge 21 is arranged in the wind guide 22 and vertically arranged, and the filter cartridge 21 surrounds the periphery of the suction port 221. The cross section of the filter cartridge 21 is circular, and the bottom wall of the filter cartridge 21 is a closed end. Along the airflow path, the fan 23 is located downstream of the filter cartridge 21 and upstream of the exhaust passage 14.

[0059] As shown in Figure 2 The wind guide 22 is a circular truncated cone with a cross-sectional area gradually decreasing from top to bottom, so that the outer peripheral surface of the wind guide 22 guides the fluid in the dust chamber 10 downward, so that the fluid flows around the peripheral wall of the filter cartridge 21.

[0060] It can be understood that after the fluid enters the dust chamber through the air inlet passage 13, the fluid moves around the peripheral wall of the filter cartridge 21, and the airflow filtered by the peripheral wall of the filter cartridge 21 enters the wind guide 22 through the suction port 221, and then enters the fan 23 under the guidance of the inner peripheral surface of the wind guide 22, and then sequentially passes through the air outlet of the fan 23 and the exhaust passage 14.

[0061] It should be noted that the air inlet passage 13 is arranged at the position close to the opening 110 of the lid 12, or the air inlet passage 13 is arranged at the position close to the opening 110 of the barrel body 11.

[0062] As shown in Figure 2 The air inlet passage 13 comprises a first pipe section 131 and a second pipe section 132, and the second pipe section 132 is located downstream of the first pipe section 131 along the fluid flow direction in the air inlet passage 13. The second edge 1102 corresponds to the first side wall plate 16 of the dust barrel 1, that is, the second edge 1102 is located on the first side wall plate 16. The side edge 1100 corresponds to the second side wall plate 17 of the dust barrel, that is, the side edge 1100 is located on the second side wall plate 17. The first pipe section 131 is installed on the first side wall plate 16, that is, the air inlet passage 13 is installed on the first side wall plate 16. At least part of the second pipe section 132 is arranged in the dust chamber 10 and located beside the following outer contour line 20. The peripheral wall of the second pipe section 132 is provided with an air outlet 1321, and the air outlet 1321 has a first position facing the second side wall plate 17. In this way, the high-speed airflow flowing out of the air outlet 1321 can be blown out along the direction of the side wall plate of the dust barrel 1, and a high-speed rotating airflow can be formed in the dust chamber 10.

[0063] Further, the second pipe segment 132 is arranged to be rotatable relative to the first pipe segment 131 about its own axis, so that the air outlet 1321 is rotatable from the second position to the first position. The axis of the second pipe segment 132 is defined as the second axis 1320, and when the air outlet 1321 is in the second position, the air outlet 1321 faces downward or toward the filter cartridge 21. In this way, by rotating the second pipe segment 132 about the second axis 1320, the circumferential position of the air outlet 1321 can be adjusted, so that the high-speed rotating airflow in the dust chamber 10 can be better formed while reducing sharp turns and sudden changes in flow direction, thereby reducing the energy loss of the airflow in the dust chamber 10.

[0064] In an embodiment, as shown in Figure 2 , the first pipe segment 131 is substantially L-shaped, and includes a first segment 1310 mounted on the bucket cover 12 and a second segment 1312 arranged vertically, the first segment 1310 being mounted on the first side wall plate 16 of the dust bucket 1, and the second pipe segment 132 being arranged vertically and mounted on the second segment 1312, the second pipe segment 132 and the second segment 1312 both being located in the dust chamber 10, and the second pipe segment 132 being rotatable relative to the second segment 1312 about its own second axis 1320.

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

[0066] In addition, in order to facilitate the movement of the vacuum cleaner, the bottom of the bucket body 11 is provided with a castor 3.

[0067] In the present embodiment, as shown in Figure 4 and Figure 5 , the above-mentioned opening 110 is hexagonal, and the inner periphery of the opening 110 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 opposite to each other, and the two side edges 1100 are arranged opposite to each other along the length direction of the first edge 1101. The air inlet passage 13 is provided on the first side wall plate 16 of the dust bucket 1, and the plane on which the opening 110 is located is defined as a first plane 1105. The outer periphery of the orthographic projection of the separation assembly 2 on the first plane 1105 is defined as an outer contour line 20. In the present embodiment, as shown in Figures 2-5 , the outer periphery of the orthographic projection of the air guide cover 22 on the first plane 1105 is the above-mentioned 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 to a, and the minimum distance between the outer periphery of the separation assembly 2 and the second edge 1102 is A, and 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 first edge 1101 and the corresponding position of the outer contour line 20 is a, and the minimum distance between the two first side edges and the corresponding position of the outer contour line 20 is a. For details, see Figure 5 "Substantially equal" means that the difference in size is about 1mm.

[0069] It can be understood that the high-speed rotating airflow entering the dust chamber 10 through the air inlet channel 13 is relatively chaotic. When A>a, the space for the airflow to enter the dust chamber 10 after passing through the air inlet channel 13 is increased, the possibility of dust particles not being separated and being directly sucked away is reduced, the particles with large specific gravity are effectively separated and settled, and the chaotic airflow is more smoothly expanded, avoiding the generation of strong vortex, reducing the sound energy aggregation of the air inlet channel 13 at the outlet, and being beneficial to reduce the noise, that is, reducing the relative pressure and sound energy value of the turbulent flow area of the air inlet channel 13 at the outlet. Since the minimum distance between the outer contour line 20 and the two side edges 1100 and the first edge 1101 is a, the fluid cross-sectional area change around the space of the filter cartridge is as small as possible, that is, the passing space of the airflow around the separation assembly 2 changes little, which is beneficial to reduce the absolute flow rate, reduce the flow rate change when the airflow passes, make the flow rate around the circulation area 151 more stable and uniform, reduce the increase of the relative pressure of the corresponding position of the inner wall of the barrel body 11, and be beneficial to reduce the uneven distribution of sound energy generated when the airflow circulates around the separation assembly 2, thereby achieving a good noise reduction effect without reducing the airflow.

[0070] When A / a=1.7~2.5, the sound energy aggregation of the air inlet channel 13 at the outlet is reduced, and at the same time, the situation that the fluid flow rate distribution is uneven due to the sudden increase of the fluid velocity of the position far away from the air inlet channel 13 on the side of the separation assembly 2 suctioning the filter cartridge 21, thereby indirectly causing the concentration of sound energy at the position, is avoided. In this way, the absolute flow rate of the airflow circulating around the separation assembly 2 is reduced, and the distribution of sound energy generated when the airflow circulates around the separation assembly 2 is more uniform, thereby achieving a better noise reduction effect. When A / a is too large (such as greater than 2.5), the airflow velocity of the air inlet channel 13 at the outlet is greatly reduced, although the noise is reduced, but the airflow circulating around the separation assembly 2 is reduced, and the separation capacity is reduced. When A / a is too small (such as less than 1.7), the sound energy of the air inlet channel 13 at the outlet is aggregated, and the noise is increased. The opening 110 is hexagonal, which makes the fluid passing area around the separation assembly 2 change smaller, thereby making the flow rate of the fluid around the separation assembly 2 more stable, and reducing the sound energy caused by the movement of the fluid in the inner cavity of the barrel body 11.

[0071] Further, as shown in 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, two ends of the third edge 1103 are connected with 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. In this way, the fluid entering through the air inlet channel 13 moves along the side wall plate corresponding to the fourth edge 1104, further slowing down the sound energy aggregation of the air inlet channel 13 at the outlet, and at the same time making the airflow more gently flow 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 the embodiment, the circumferential wall of the barrel body 11 is smoothly connected between any two adjacent side wall plates. Then, the inner circumferential edge of the opening 110 is also smoothly connected between any two adjacent edges. In this way, the entire airflow flows more smoothly along the inner circumferential wall of the barrel body 11, which is beneficial to reduce noise.

[0073] Specifically, as shown in the figure, Figure 5 The maximum distance between the first edge 1101 and the second edge 1102 is L1, the maximum distance between the two side edges 1100 is L2, and the distance L1 / L2=(1~1.4):1. It can be understood that since 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 of the air inlet channel 13 at the outlet while ensuring the airflow flowing space around the separation assembly 2, further making the chaotic airflow more smoothly expand, slowing down the sound energy aggregation of the air inlet channel 13 at the outlet, then reducing the absolute flow rate of the airflow around the separation assembly 2, making the distribution of sound energy generated when the airflow flows around the separation assembly 2 more uniform, and achieving better noise reduction effect.

[0074] It should be noted that "at the outlet of the air inlet channel 13" refers to "at the air outlet 1321 of the air inlet channel 13".

[0075] The points on the two side edges 1100 closest to the outer contour line 20 are defined as the first point 1106 and the second point 1107 respectively. The distance a=67mm~68mm, as shown in the figure, Figure 5 L1=415mm, L2=337mm, then L1 / L2=1.23. Illustratively, L1 / L2 can also be 1 or 1.4.

[0076] In Example 1, as shown in the figure, Figure 5As shown, the minimum distance a between the outer contour line 20 and the first edge 1101 is 67mm, the minimum distance a between the first point 1106 and the outer contour line 20 is 68mm, and the minimum distance a between the second point 1107 and the outer contour line 20 is also 68mm. The minimum distance A between the outer contour line 20 and the second edge 1102 is 150mm, and A / a = 2.24, or A / a = 2.2. In this embodiment 1, the air inlet channel 13 is coaxial with the air outlet channel 14, and the air outlet 1321 is downward, i.e., the air outlet 1321 is in the second position. Figure 6 As shown, the first tube segment 131 and the second tube segment 132 of the air inlet channel 13 are coaxially arranged, and the air outlet 1321 is downward, i.e., the air outlet 1321 is in the second position.

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

[0078] In the 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 the 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, and the minimum distance between the outer contour line 20 and the second edge 1102 is 150mm, i.e., A / a = 1.7 or 2.5.

[0080] It should be noted that in each of the above embodiments, the size of the outer contour line 20 is equal to that of the outer contour line 20 of the existing separation assembly 2. In addition, the air outlet 1321 is downward, i.e., in the second position.

[0081] The embodiment 5 of the present application differs from the above-mentioned embodiment 1 only in the structure of the air inlet channel 13. Specifically, the structure of the air inlet channel 13 is shown in Figure 2 and Figure 3 As shown, the air outlet 1321 is toward the second side wall plate 17.

[0082] As shown in Figure 2 , Figure 4 and Figure 5As shown, the outer peripheral wall of the upper region of the separation assembly 2 and the inner peripheral wall of the barrel 11 form an airflow region 15, which is sequentially divided into a cyclone region 151 and a turbulent region 152 along the circumference of the separation assembly 2. The turbulent region 152 is located on the side where the air inlet channel 13 is located and between the axial center 201 of the outer contour line 20 and the second edge 1102. Thus, since A > a, the space of the turbulent region 152 is increased, the degree of turbulence of the turbulent airflow in the turbulent region 152 is reduced, the sound energy aggregation at the outlet of the air inlet channel 13 is slowed down, and when the turbulent airflow flows into the cyclone region 151, the flow trajectory is relatively regular, which is beneficial to reduce the uneven distribution of sound energy generated when the airflow circulates around the separation assembly 2, thereby achieving a better noise reduction effect without reducing the airflow.

[0083] It should be noted that when the fluid enters the dust chamber 10 through the air inlet channel 13, the turbulent region 152 and the cyclone region 151 are formed at the top of the dust chamber 10.

[0084] Further, the dividing lines of the turbulent region 152 and the cyclone region 151 are defined as a first dividing line 153 and a second dividing line 154, respectively. The first dividing line 153 and the second dividing line 154 and the second edge 1102 enclose the turbulent region 152. The first dividing line 153 and the second dividing line 154 intersect on the extension line of the orthogonal projection of the first plane 1105, and the intersection point is arranged close to the axial center 201 of the outer contour line 20. The first dividing line 153 and the second dividing line 154 are both inclined lines that form an acute angle α with the second edge 1102.

[0085] It can be understood that the first dividing line 153 and the second dividing line 154 are both inclined lines, so that a guide slope is formed between the turbulent region 152 and the cyclone region 151. The existence of the guide slope makes the fluid motion friction with the peripheral wall of the barrel 11 have a clear dividing trajectory, plays a role in pressure release, airflow backflow in the turbulent region 152, and airflow backflow from the turbulent region 152 to the cyclone region 151, and expands the space when the turbulent region 152 flows to the cyclone region 151. The longer turbulent region 152 increases the volume of the turbulent region 152, which can release the positive pressure of the turbulent region 152 to some extent, strengthen the dust collection efficiency of the dust collector, and at the same time, as much as possible, ensure that the fluid cross-sectional area change around the filter cartridge is small. In this way, the strong turbulence in the turbulent region 152 can be avoided, the directional rotation of the airflow can be ensured, the rotating airflow can move smoothly and orderly around the filter cartridge 21 at a high speed, the sound energy distribution generated when the airflow circulates around the filter cartridge 21 is relatively uniform, and the sound energy caused by the fluid motion in the barrel 11 is reduced.

[0086] Further, the projection areas of the turbulent flow area 152 and the circular flow area 151 on the first plane 1105 are A1 (not shown in the figure) and A2 (not shown in the figure) respectively, and A1 / A2 = 1 / (1-1.4). In this way, the projection area of the turbulent flow area 152 is close to that of the circular flow area 151 in the entire air flow area 15, that is, a larger turbulent flow area 152 is ensured, so that the chaotic air flow entering through the air inlet channel 13 can be more smoothly expanded, the sound energy aggregation at the outlet of the air inlet channel 13 is slowed down, and then the absolute flow rate of the air flow around the filter cartridge 21 is reduced, so that the distribution of the sound energy generated when the air flow surrounds the filter cartridge 21 is more uniform, and a better noise reduction effect is achieved. In the embodiment, A1 / A2 = 1 / 1.27. Illustratively, A1 / A2 = 1, and A1 / A2 = 1 / 1.4.

[0087] It should be noted that the acute angle a can be 45°.

[0088] In the present embodiment, the axis of the first section 1310 is defined as the first axis 1311, and the distance between the first axis 1311 and the first boundary line 153 is equal to the distance between the first axis 1311 and the second boundary line 154. In this way, the chaotic air flow in the turbulent flow area 152 can be more smoothly expanded, and the turbulent air flow is avoided, the sound energy aggregation at the outlet of the air inlet channel 13 is slowed down, and the noise is reduced.

[0089] Comparative Example 1:

[0090] As shown in Figure 7 , the length L1 of Comparative Example 1 is the same as that of the above-mentioned 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 with Embodiment 1, the size of 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] As shown in Figure 8 , the length L2 of Comparative Example 2 is the same as that of the above-mentioned Embodiment 1. Specifically, the minimum distance a between the first point 1106 and the second point 1107 and the outer contour line 20 is 68 mm. The length L1 of Comparative Example 2 is also the same as that of the above-mentioned Embodiment 1. The difference lies in that the separation assembly 2 is moved closer to the first edge, that is, the minimum distance a between the outer contour line 20 and the first edge 1101 is 42 mm, and the minimum distance A between the outer contour line 20 and the second edge 1102 is 175 mm.

[0093] It should be noted that the shapes and sizes of the separation assemblies of the above-mentioned embodiment 1, comparative example 1 and comparative example 2 are completely same, and the setting positions (heights) and structures of the air inlet channels are also completely same, i.e. the air outlet 1321 is at the second position.

[0094] Comparative example 3:

[0095] As shown in Figure 9 , the difference between comparative example 3 and the above-mentioned embodiment 5 is only that the air outlet 1321 is at the second position, specifically, the air outlet 1321 is towards the filter cartridge 21.

[0096] Referring to Figures 10-29 , the above-mentioned embodiment 1, embodiment 5, comparative examples 1-3 are simulated by CFD (Computational Fluid Dynamics), i.e. computational fluid dynamics simulation.

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

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

[0099] It can be known from Figure 14 and Figure 15 that the maximum absolute velocity of the fluid in the dust chamber 10 of comparative example 1 is 31.342 m / s. It can be known from Figure 16 that the minimum relative pressure in the dust chamber 10 of comparative example 1 is -1100.21 Pa, it can be known from Figure 17 that the acoustic energy in the dust chamber 10 of comparative example 1 is 3.81 dB-41.86 dB.

[0100] It can be known from Figure 18 and Figure 19 that the maximum absolute velocity of the fluid in the dust chamber 10 of comparative example 2 is 32.043 m / s. It can be known from Figure 20 that the minimum relative pressure in the dust chamber 10 of comparative example 2 is -1008.43 Pa, it can be known fromFigure 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 above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to 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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