Suction assembly of a robot vacuum cleaner and robot vacuum cleaner

Abstract

The application discloses a dust collection assembly of a sweeping machine and the sweeping machine. The dust collection assembly of the sweeping machine comprises a fan shell, a volute and a double-suction impeller. One side of the fan shell is provided with an air suction port, and the other side of the fan shell is provided with a first air outlet. The volute is arranged on the fan shell, and one side of the volute is communicated with the first air outlet. One end of the volute is provided with a first air inlet, and the other end of the volute is provided with a second air inlet. The double-suction impeller is arranged in the volute, and a first air blade and a second air blade are correspondingly arranged on the two sides of a middle plate. Air entering from the air suction port flows into the first air blade from the first air inlet and flows into the second air blade from the second air inlet, and finally flows out from the first air outlet. The double-suction impeller is equivalent to two impellers connected in parallel, that is, the two impellers rotate simultaneously, and the air volume generated is equivalent to the air volume generated by two fans. Compared with the same rotating speed of a single air blade of a single fan, the double-suction impeller generates double air volume and has small noise. Compared with two single fans, the double-suction impeller occupies small space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a dust suction assembly of a sweeping machine and the sweeping machine. BACKGROUND

[0002] The fan of the sweeping machine is a dust suction power component, and its working efficiency plays a decisive role in dust suction of the sweeping machine. The existing sweeping machine generally uses a single-suction-port high-speed fan with a single fan and a single fan blade. In order to achieve good dust suction effect, a very high rotating speed is required to improve suction force and air volume, which will cause high noise. In addition, two fans are used, which occupies a large space and has high cost, and is not easy to realize. SUMMARY

[0003] The main purpose of the present application is to provide a dust suction assembly of a sweeping machine and the sweeping machine, which aims to solve the technical problems of large fan noise and large space occupation.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A dust suction assembly of a sweeping machine comprises:

[0006] A fan shell is provided with an air suction port on one side and a first air outlet on the other side.

[0007] A volute is arranged in the fan shell, and one side of the volute is communicated with the first air outlet. One end of the volute is provided with a first air inlet, and the other end of the volute is provided with a second air inlet.

[0008] A double-suction impeller is arranged in the volute, and the double-suction impeller comprises a middle plate, a first fan blade and a second fan blade. The first fan blade and the second fan blade are arranged on both sides of the middle plate correspondingly.

[0009] A base circle is taken as an involute center to form an involute line, and the diameter of the base circle perpendicular to the air suction port is taken as a symmetry axis. The involute line is divided into two symmetrical half involute lines.

[0010] Wherein, the air entering from the air suction port flows into the first fan blade from the first air inlet, and flows into the second fan blade from the second air inlet, and finally flows out from the first air outlet.

[0011] Further, the first fan blade, the second fan blade and the middle plate are coaxially arranged. The first fan blade comprises a plurality of first blades, and the plurality of first blades are arranged on one side of the middle plate. The second fan blade comprises a plurality of second blades, and the plurality of second blades are fixedly arranged on the other side of the middle plate.

[0012] Further, the volute is close to the first end of the air inlet, the upper and lower sides of the first end gradually converge to the middle, forming a cone, and the top of the cone is close to the air inlet.

[0013] Further, the plurality of first vanes and the plurality of second vanes are of the same shape, and are all circular arc shapes; the plurality of first vanes and the plurality of second vanes are arranged on the middle plate and curved in the same direction.

[0014] Further, the plurality of first vanes are arranged along the upper end of the middle plate in a circumferential direction at equal intervals, and the plurality of second vanes are arranged along the lower end of the middle plate in a circumferential direction at equal intervals; the first vanes and the second vanes are arranged symmetrically with respect to a vertical bisector of the middle plate in a thickness direction.

[0015] Further, the volute divides the fan shell into two parts, and the distance between each part of the fan shell and the volute gradually decreases from the sides to the center of the fan shell.

[0016] Further, the motor is arranged in the mounting groove, the bottom of the mounting groove is provided with a through hole, the rotating shaft of the motor passes through the through hole, the first air inlet and the middle plate are connected, and the motor drives the middle plate to rotate; the center of gravity of the middle plate extends along the thickness to form a clamping hole column, and the rotating shaft is clamped in the clamping hole column; the clamping hole column, the through hole and the rotating shaft are coaxially arranged with the double-suction impeller.

[0017] Further, the circumference of the reference circle is divided into several equal parts, the circumference of the reference circle is equally divided, a tangent line of the reference circle is drawn through each division point on the circumference, and the included angle between two adjacent tangent lines is an air inlet angle; the volute divides the inner cavity of the fan shell into two identical air chambers; the tangent line divides each air chamber into multiple parts, one end of the involute near the first air outlet is an open end, the other end of the involute is a terminal end, the cross-sectional area of each part of the air chamber decreases linearly along the air inlet angle from the open end to the terminal end of the involute.

[0018] Further, the dust box is provided with a dust inlet on one side and a second air outlet on the other side, the silica gel ring is clamped on the hole wall of the second air outlet, and the end of the fan shell provided with the air inlet is assembled with the silica gel ring in an interference fit.

[0019] The application also discloses a sweeper, which comprises the dust collection assembly of any one of the above.

[0020] Beneficial effects:

[0021] The dust collection assembly of the sweeper, the double suction impeller is arranged in the volute, which is equivalent to two impellers in parallel, that is, two impellers rotate at the same time, and the air volume generated is equivalent to the air volume generated by two fans, the double suction impeller generates double air volume at the same speed compared with the single fan, and the double suction impeller generates the same air volume at a smaller speed and smaller noise; compared with two single fans, the double suction impeller occupies a smaller space. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of the dust collection assembly of the sweeper in an embodiment of the present application;

[0023] Figure 2 is a sectional view of the dust collection assembly of the sweeper in an embodiment of the present application;

[0024] Figure 3 is a structure schematic view of the equal division of the wind chamber in an embodiment of the present application;

[0025] Figure 4 is a structure schematic view of the double suction impeller in an embodiment of the present application;

[0026] Figure 5 is a partial structure schematic view of the dust collection assembly of the sweeper in an embodiment of the present application.

[0027] 1, fan shell;11, air inlet;12, first air outlet hole;2, double suction impeller;21, middle plate;22, first fan blade;23, second fan blade;24, clamping hole column;3, volute;4, dust box;41, dust inlet;5, silica gel ring;6, motor.

[0028] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that the terms "one end", "the other end", "first", "second" and similar expressions used herein are only for illustrative purposes, and cannot be understood as indicating or implying relative importance.

[0032] The technical solutions of the various embodiments in this invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0033] Reference Figures 1 to 5 In one embodiment, the present invention also discloses a dust collection component for a sweeping machine. The dust collection component includes a fan housing 1, a volute 3, and a dual-suction impeller 2. A suction port 11 is provided on one side of the fan housing 1, and a first air outlet 12 is provided on the other side of the fan housing 1. The volute 3 is disposed in the fan housing 1, and one side of the volute 3 is connected to the first air outlet 12. A first air inlet is provided at one end of the volute 3, and a second air inlet is provided at the other end of the volute 3. The dual-suction impeller 2 is disposed inside the volute 3. The dual-suction impeller 2 includes a middle plate 21, a first fan blade 22, and a second fan blade 23. The first fan blade 22 and the second fan blade 23 are respectively disposed on both sides of the middle plate 21. An involute curve is formed with a reference circle as the involute center, and with the diameter of the reference circle perpendicular to the suction port 11 as the axis of symmetry, the involute curve is divided into two symmetrical semi-involute curves.

[0034] The air entering from the air intake 11 flows into the first fan blade 22 from the first air inlet, flows into the second fan blade 22 from the second air inlet, and finally flows out from the first air outlet 12.

[0035] In the above embodiment, a double-suction impeller 2 is provided inside the volute 3, which is equivalent to two impellers connected in parallel. That is, the two impellers rotate simultaneously, and the air volume generated is equivalent to the air volume generated by two fans. Compared with a single fan blade of a single fan, the double-suction impeller 2 produces twice the air volume at the same rotation speed. To produce the same air volume, the double-suction impeller 2 has a lower rotation speed and lower noise. Compared with two single fans, the double-suction impeller 2 occupies less space. The fan casing 1 forms an involute linear structure with the air inlet 11 as the starting point and the reference circle as the involute center, ensuring that the intake gas is uniformly introduced into the fan blade inlet around the reference circle.

[0036] The fan housing 1 adopts an involute shape. The width of the fan housing 1 gradually decreases from the air inlet 11 to the first air outlet 12, that is, the fan housing 1 gradually narrows. This guides the airflow near the air inlet 11 and gradually stabilizes the airflow. Stabilizing the airflow can further reduce noise.

[0037] The double-suction impeller 2 divides the volute 3 into a first air chamber and a second air chamber. The first and second air chambers are located on the upper and lower sides of the double-suction impeller 2, respectively, without interfering with each other, supplying air to the upper and lower sides of the double-suction impeller 2 to ensure the air volume generated by the double-suction impeller 2. The air entering the fan casing 1 from the air inlet 11 is partially drawn into the first air chamber through the first air inlet and then flows into the first fan blade 22, while part of it enters the second air chamber through the second air inlet and then flows into the second fan blade 22, finally flowing out through the first air outlet 12.

[0038] Compared with a double-suction impeller 2 and a single-impeller blade fan made into double width, the blade fan is made into double width, and there is no air flow from one side. The air volume is more; the impeller is too wide, and the airflow cannot fully fill the volute 3, and the airflow separation produces noise and pressure loss; the width of the impeller is calculated according to the working condition. With a double-suction impeller 2, it is equivalent to a single-impeller air volume, and the load is lower and the efficiency is higher.

[0039] The double-suction impeller 2 is arranged in the volute 3, and the first fan blade 22 and the second fan blade 23 are arranged in the volute 3. The first fan blade 22 and the second fan blade 23 together realize the effect of parallel operation of the double-impeller single-fan body 1. Ensure the air volume generated by the fan body 1.

[0040] The volute 3 is arranged in the casing 1, and is integrally formed with the casing 1, which is convenient for processing.

[0041] In an embodiment, the first fan blade 22, the second fan blade 23 and the middle plate 21 are coaxially arranged.

[0042] In the above embodiment, when the double-suction impeller 2 works, the first fan blade 22, the second fan blade 23 and the middle plate 21 continuously rotate to form an airflow in the volute. The first fan blade 22, the second fan blade 23 and the middle plate 21 are coaxially arranged to prevent the first fan blade 22, the second fan blade 23 and the middle plate 21 from deviating during rotation, ensure the stability of the double-suction impeller 2, and prevent the double-suction impeller 2 from colliding with the volute 3 to produce noise.

[0043] In an embodiment, the first fan blade 22 includes a plurality of first blades, and the plurality of first blades 22 are arranged at one side of the middle plate 21; the second fan blade 23 includes a plurality of second blades, and the plurality of second blades are fixedly arranged at the other side of the middle plate 21.

[0044] In the above embodiment, the first fan blade 22 and the second fan blade 23 are arranged on both sides of the middle plate 21 to realize parallel connection of the first fan blade 22 and the second fan blade 23 and increase the air volume of the fan body 1. The first fan blade 22 and the second fan blade 23 are symmetrically arranged on the middle plate 21 back to back, the first fan blade 22 is located in the first air cavity, and the second fan blade 23 is located in the second air cavity, and they do not interfere with each other.

[0045] The first fan blade 22 includes a plurality of first blades, and the second fan blade 23 includes a plurality of second blades, which ensures that the double-suction impeller 2 generates greater wind power when working.

[0046] In an embodiment, one end of the volute 3 close to the air inlet 11 is a first end, the upper and lower sides of the first end gradually converge to the middle, forming a cone, and the top of the cone is close to the air inlet 11.

[0047] In the above embodiment, the volute 3 is used for flow splitting, the airflow entering from the air inlet 11 flows into the first and second air chambers through the flow splitting of the volute 3, and the guide volute 3 is formed as a cone near the air inlet 11, and the top of the cone is close to the air inlet 11, which can reduce the impact of the airflow entering from the air inlet 11 on the volute 3, thereby reducing the noise. The guide volute 3 is formed as a cone near the air inlet 11, and the top of the cone is close to the air inlet 11, so that the airflow entering from the air inlet 11 smoothly transitions into the volute 3.

[0048] In an embodiment, the plurality of first blades and the plurality of second blades are of the same shape, which is circular arc shape; the plurality of first blades and the plurality of second blades are arranged on the middle plate 21 to bend in the same direction.

[0049] In the above embodiment, during rotation of the first and second blades, the circular arc shape facilitates the formation of airflow to increase air volume. The plurality of first blades and the plurality of second blades are of the same shape and bend in the same direction on the middle plate 21, so that the generated airflow is in the same direction, preventing the airflow in the volute 3 from being chaotic, and ensuring the stability of the double-suction impeller 2.

[0050] In an embodiment, the plurality of first blades are arranged at equal intervals along the circumference of the upper end of the middle plate 21, and the plurality of second blades are arranged at equal intervals along the circumference of the lower end of the middle plate 21; the first blades and the second blades are arranged symmetrically about the vertical bisector of the middle plate thickness.

[0051] In the above embodiment, when the double-suction impeller 2 is working, the middle plate 21 rotates continuously, thereby driving the plurality of first blades and the plurality of second blades to rotate. The plurality of first blades are arranged at equal intervals along the circumference of the upper end of the middle plate 21, and the plurality of second blades are arranged at equal intervals along the circumference of the lower end of the middle plate 21, which ensures the balance of the middle plate 21 during rotation of the plurality of first blades and the plurality of second blades, and prevents the plurality of first blades, the plurality of second blades, or the middle plate 21 from colliding with the volute 3 during rotation to generate noise.

[0052] Referring to Figure 4 , the first and second blades 22 and 23 are arranged symmetrically on the middle plate 21, and the middle plate 21 is completely symmetrical on both sides, which is equivalent to two parallel working blades. The first and second blades 22 and 23 adopt airfoil-shaped blades to reduce airflow resistance and thereby reduce noise. The first and second blades 22 and 23 are arranged in the volute 3, and the volute has a first air inlet and a second air inlet at both ends, respectively. The two ends do not interfere with each other, and together realize the effect of parallel working of single-fan double-impeller, and the air volume is doubled compared to single-fan single-blade, thereby greatly improving the dust collection efficiency.

[0053] In an embodiment, the volute divides the fan shell into two parts, and the distance between each part of the fan shell and the volute gradually decreases from the sides to the center of the fan shell 1.

[0054] In the above embodiment, the volute divides the fan shell into two parts, the middle part contains the volute, the shape and size of the upper and lower parts are the same, which ensures that the air inlet of the volute at both ends is the same, preventing the fan shell 1 from shaking. The first air inlet and the second air inlet of the volute are located at the center of the volute in the horizontal direction, also at the middle position of the fan shell 1. The distance between each part of the fan shell and the volute gradually decreases from both sides to the center of the fan shell 1, improving the air inlet rate of the volute.

[0055] In an embodiment, the dust collection assembly of the sweeper further includes a motor, the fan shell 1 is provided with a mounting groove, the motor 6 is mounted in the mounting groove, the groove bottom of the mounting groove is provided with a through hole, the rotating shaft of the motor 6 is connected with the middle plate 21 through the through hole and the first air inlet, and the motor 6 drives the middle plate 21 to rotate. The center of gravity of the middle plate 21 extends along its thickness to form a clamping hole column 24, and the rotating shaft is clamped in the clamping hole column 24; the clamping hole column 24, the through hole and the rotating shaft are coaxially arranged with the double suction impeller 2

[0056] In the above embodiment, the outer surface of the fan shell 1 is provided with a mounting groove for mounting the motor 6, the groove bottom of the mounting groove is provided with a mounting hole for the rotating shaft of the motor 6 to pass through, the middle position of the upper surface of the middle plate 21 protrudes outward to form a clamping hole column 24, the clamping hole column 24 extends out of the first air inlet, the rotating shaft of the motor 6 drives the double suction impeller 2 to rotate through the clamping hole column 24, ensuring the air volume of the fan body 1.

[0057] The rotating shaft is clamped in the clamping hole column 24 formed by the center of gravity of the middle plate 21 extending along its thickness, increasing the firmness, and facilitating the rotation of the middle plate 21 by the motor 6 through the rotating shaft. The clamping hole column 24, the through hole and the rotating shaft are coaxially arranged with the double suction impeller 2, ensuring the balance of the double suction impeller 2 when rotating, preventing the multiple first blades, the multiple second blades or the middle plate 21 from colliding with the volute 3 when rotating to generate noise.

[0058] In an embodiment, the circumference of the reference circle is divided into several equal parts, the circumference of the reference circle is equally divided, a tangent line is drawn through each equal point on the circumference, and the included angle between two adjacent tangent lines is the inlet angle; the volute 3 separates the inner cavity of the fan shell 1 into two identical air chambers; the tangent line divides each air chamber into multiple parts, the end of the involute close to the first air outlet 12 is the starting end, the other end of the involute is the terminal end, and the cross-sectional area of each part of the air chamber decreases linearly along the starting end to the terminal end of the involute.

[0059] In the above embodiment, the width of the fan shell 2 gradually decreases from the air inlet 11 to the first air outlet 12, and the cross-sectional area of each part of the air chamber decreases linearly with the inlet angle, that is, the cross-sectional area of the air chamber divided by the same angle away from the air inlet 11 decreases linearly with the inlet angle, ensuring that the air speed of each cross section is basically equal, thereby realizing uniform axial introduction of the double suction impeller 2, and small airflow pressure fluctuation and low noise in the air chamber.

[0060] Air flow from the suction port 11 into the fan shell 2, and the flow through each cross section will have a part of the gas guide into the double suction impeller 2, so the flow of the latter cross section is smaller and smaller. The wind speed of each cross section is the flow divided by the cross-sectional area, the flow of the cross section is smaller and smaller, to ensure that the wind speed of each cross section is equal, only the cross section is smaller and smaller, so the cross-sectional area of each part of the wind chamber decreases linearly with the angle of admission.

[0061] The reference circumference is divided into several equal parts Figure 3 Draw half, divided into 8 equal parts, the circumference πD is equally divided; draw the tangent of the circle through each equal point on the circumference of the reference circle; on the first tangent, take a point 1 from the tangent point by taking one equal part of the circumference (πD / 16); on the second tangent, take a point 2 from the tangent point by taking two equal parts of the circumference (2xπD / 16); and so on to get points 3, 4, …, 16; smooth connection of points 1, 2, 3, …, 16 with a curve board. The involute of the circle is obtained.

[0062] The involute is involuted around πD (where D is the diameter of the reference circle and π is the circumference ratio), and the first 180 degrees is the profile, so it is a half involute.

[0063] Each cross section around the reference circle is designed as a trapezoidal structure to ensure convergence into the double suction impeller 2. The cross-sectional area of each part from the suction port 11 to the first air outlet is S1, S2, S3, S4, …, S8, respectively (where S represents the cross-sectional area). Each cross section is determined by the area of the trapezoidal section, S = (a + b) * h / 2 (where a represents the upper base of the trapezoidal section, b represents the lower base of the trapezoidal section, and h represents the height of the trapezoidal section). Then the cross-sectional velocity V = Q / S, and each cross section is determined by a, b, and h. Then according to the flow relationship of each cross section, the relationship between a, b, and h of each cross section can be obtained, that is, a complete symmetrical half involute air inlet chamber can be obtained, and the cross-sectional velocity around the radius of the reference circle is basically equal.

[0064] The flow rate of each part from the suction port 11 to the first air outlet is Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, respectively, and their relationship is Q2 = 7 / 8Q1, Q3 = 6 / 8Q1, Q4 = 5 / 8Q1, Q5 = 4 / 8Q1, Q6 = 3 / 8Q1, Q7 = 2 / 8Q1, Q8 = 1 / 8Q1 (where Q represents the air volume).

[0065] In an embodiment, the dust suction assembly of the sweeper further comprises a dust box 4 and a silica gel ring 5. One side of the dust box 4 is provided with a dust inlet 41, and the other side is provided with a second air outlet hole. The silica gel ring 5 is clamped on the hole wall of the second air outlet hole, and one end of the fan shell 1 is in interference fit with the silica gel ring 5.

[0066] In the above embodiment, the dust box 4 is used to store garbage, external ventilation flows into the dust box 4 through the dust inlet 41 of the dust box 4, flows into the fan shell 1 through the second air outlet, and the double-suction impeller 2 rotates to form an air flow to suck the garbage on the ground into the dust box 4. The silica gel ring 5 is clamped on the hole wall of the second air outlet, one end of the fan shell 1 provided with the air suction port 11 is interference-fitted with the silica gel ring 5, air leakage is prevented, and the air volume generated by the fan body 1 is ensured to suck the garbage on the ground into the dust box 4.

[0067] The air suction port 11 of the double-suction fan body 1 and the dust box 4 are interference-connected by the silica gel ring 5, when the sweeper works, the air flow sucked from the dust inlet 41 is divided into two, and is introduced into the first fan blade 22 and the second fan blade 23, which is equivalent to two fans working in parallel, the working efficiency is doubled, and the double-suction fan has the advantages of small space and low cost compared with double fans.

[0068] In an embodiment, the application further discloses a sweeper, which comprises the dust suction assembly of any one of the above.

[0069] The above is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent flow transformation obtained by using the content of the specification and the drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A vacuuming component for a sweeping machine, characterized in that, include: The dust box has a dust inlet on one side and a second air outlet on the other side. A fan housing, wherein an air intake is provided on one side of the fan housing and the air intake is connected to the second air outlet, and a first air outlet is provided on the other side of the fan housing; A volute is disposed in the fan housing, and one side of the volute is connected to the first air outlet. A first air inlet is provided at one end of the volute, and a second air inlet is provided at the other end of the volute. The end of the volute near the second air outlet is provided with an upwardly inclined first slope and a downwardly inclined second slope. The first slope and the second slope gradually converge towards the middle to form a cone, and the apex of the cone is close to the air inlet. The fan housing includes a downwardly inclined top wall and an upwardly inclined bottom wall. The distance between the top wall and the bottom wall and the volute gradually decreases from the side where the air inlet is located towards the center of the fan housing. The first slope and the top wall form a first flow channel, and the second slope and the bottom wall form a second flow channel. A double-suction impeller is disposed inside the volute casing. The double-suction impeller includes a middle plate, a first fan blade, and a second fan blade, with the first fan blade and the second fan blade respectively disposed on both sides of the middle plate. The fan casing forms an involute with a reference circle as the involute center, and with the diameter of the reference circle perpendicular to the air inlet as the axis of symmetry, the involute is divided into two symmetrical semi-involutes. The air entering from the dust inlet is discharged from the second air outlet and enters the air intake. Part of it flows through the first guide channel and the first air inlet and enters the first fan blade, while part of it flows through the second guide channel and the second air inlet and enters the second fan blade. Finally, both of them flow out from the first air outlet.

2. The dust collection component of the sweeper according to claim 1, characterized in that, The first fan blade, the second fan blade, and the middle plate are coaxially arranged; the first fan blade includes a plurality of first blades, which are spaced apart on one side of the middle plate; the second fan blade includes a plurality of second blades, which are fixedly arranged on the other side of the middle plate.

3. The dust collection component of the sweeper according to claim 2, characterized in that, The multiple first blades and multiple second blades have the same shape, all being arc-shaped; the multiple first blades and multiple second blades are arranged on the middle plate and bent in the same direction.

4. The dust collection component of the sweeper according to claim 2, characterized in that, Multiple first blades are equally spaced along the upper circumference of the middle plate, and multiple second blades are equally spaced along the lower circumference of the middle plate; the first blades and the second blades are symmetrically arranged with respect to the thickness direction of the middle plate.

5. The dust collection component of the sweeper according to claim 1, characterized in that, The volute divides the fan housing into two parts, and the distance between each part of the fan housing and the volute gradually decreases from both sides toward the center of the fan housing.

6. The dust collection component of the sweeper according to claim 1, characterized in that, It also includes a motor. The fan housing is provided with a mounting groove, and the motor is installed in the mounting groove. The bottom of the mounting groove is provided with a through hole. The motor's rotating shaft is connected to the middle plate through the through hole and the first air inlet. The motor drives the middle plate to rotate. The center of gravity of the middle plate extends along its thickness to form a snap-fit ​​post. The rotating shaft is snapped onto the snap-fit ​​post. The snap-fit ​​post, the through hole, and the rotating shaft are all coaxially arranged with the double suction impeller.

7. The dust collection component of the sweeper according to claim 1, characterized in that, The circumference of the reference circle is divided into several equal parts, and the circumference of the reference circle is also divided into equal parts. Tangents to the reference circle are drawn through each of the division points on the circumference. The angle between two adjacent tangents is the air intake angle. The volute divides the inner cavity of the fan housing into two identical air chambers. The tangents divide each air chamber into multiple parts. The end of the involute near the first air outlet is the beginning, and the other end of the involute is the end. Along the beginning to the end of the involute, the cross-sectional area of ​​each part of the air chamber decreases linearly with the air intake angle.

8. The dust collection component of the sweeper according to claim 1, characterized in that, It also includes a silicone ring, which is snapped into the wall of the second air outlet, and the end of the fan housing with the air intake is press-fitted with the silicone ring.

9. A sweeping machine, characterized in that, Includes the vacuuming component of the sweeper according to any one of claims 1 to 8.

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