Bucket cover base of dust collector

Abstract

The utility model discloses a dust collector barrel cover base, which belongs to the technical field of dust collectors and is characterized in that an eccentrically arranged mounting groove is arranged on the barrel cover base, a first air inlet and second air inlets annularly distributed on the periphery of the first air inlet are arranged at the bottom of the mounting groove, and a partition plate is arranged on the outer edge of the mounting groove. The partition plate is provided with a through hole and forms an air inlet channel with the inner wall of the barrel cover base. The first air inlet hole and the second air inlet hole greatly increase the air inlet area of the barrel cover base, when airflow in the barrel body enters the barrel cover base, gentle airflow can be formed, and therefore noise generated by the airflow can be effectively reduced; the partition plate on the barrel cover base can be eccentrically arranged on the barrel cover base like the mounting groove, so that an air inlet channel formed by the partition plate and the inner wall of the barrel cover base is an air channel with the radial size changing, the air inlet channel is gradually enlarged in the air flow direction, the flow speed of air flow can be further reduced, and noise generated by the air flow is further reduced; and an effective noise reduction effect is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dust collector structure more specifically, it relates to a dust collector barrel cover base. BACKGROUND

[0002] As a kind of household electrical appliances, its market present situation and future trend have shown its important position in home cleaning and constantly improving technical level, the development of dust collector industry will pay more attention to the innovation and intelligent of product, for example, develop the dust collector product with higher performance, lower noise, longer endurance, especially for the optimization of noise, it is the most direct experience and feeling of user to product;Therefore, the noise of dust collector should still be more important focus.

[0003] For example: China patent announcement No.CN207429050U, announcement date is June 1, 2018, the utility model name is a kind of industrial low-noise dust collector, including control panel, dust collector main body cover, walking wheel, dust collector main body, filter layer, speed controller, water outlet and stabilizer, the walking wheel top is equipped with base, and base top is equipped with dust collector main body, the dust collector main body surface is equipped with water outlet pipe, the dust collector main body surface is equipped with detachable hose joint, and detachable hose joint left side is equipped with dust hard pipe, the dust collector main body top is equipped with dust collector main body cover, and dust collector main body cover surface is equipped with control panel, the control panel surface is equipped with power switch button. The scheme makes the functionality of equipment stronger, and the intelligent effect is better. But for the way of noise reduction, the way of increasing silencer is handled, on the one hand, it does not carry out noise reduction from the source, on the other hand, it increases too much structure, and the dust collector structure is complex. UTILITY MODEL CONTENT

[0004] The utility model overcomes the existing dust collector noise reduction effect is poor, and the problem that noise reduction structure is complex, provides a dust collector barrel cover base, the air flow path of dust collector barrel cover base position is improved in the scheme, while reducing the flow velocity, the collision and reflection of air flow and dust collector internal structure are also reduced, can greatly reduce the noise of dust collector.

[0005] In order to solve the above technical problems, the utility model discloses the following technical scheme: a dust collector barrel cover base is equipped with eccentric installation groove on the barrel cover base, the bottom of installation groove is equipped with first air inlet and annular distribution second air inlet in the periphery of first air inlet, the outer edge of installation groove is equipped with baffle, the baffle is equipped with through -hole and forms the air inlet channel with the inner wall of barrel cover base.This scheme, first air inlet and second air inlet can pass into the airflow in the dust collector barrel to the inside of barrel cover base, and finally the excess airflow is discharged from the barrel cover part, which can guarantee the air pressure inside the dust collector barrel, and the dust collector can work continuously and stably;First air inlet and second air inlet greatly increase the air inlet area of barrel cover base, and when the airflow in the barrel enters the inside of barrel cover base, a relatively gentle airflow can be formed, thereby effectively reducing the noise generated by the airflow;The baffle on the barrel cover base is eccentrically arranged on the barrel cover base like the installation groove, so that the air inlet channel formed by the baffle and the inner wall of the barrel cover base is a radial dimension variable gas channel, which gradually increases along the airflow direction, thereby further slowing down the flow rate of the airflow, further reducing the noise generated by the airflow, and achieving effective noise reduction effect.

[0006] As a preferred, the distance from the through hole to the inner wall of the barrel cover base is less than the distance from the baffle to the inner wall of the barrel cover base. The through hole on the baffle can pass the airflow in the installation groove to the air inlet channel. On the baffle, the distance from the through hole to the inner wall of the barrel cover base is the smallest, so that the radial dimension of the air inlet channel along the air inlet direction is gradually increasing, so that the position of the air inlet channel can effectively reduce the flow rate of the entering gas, and achieve the effect of noise reduction.

[0007] As a preferred, the side of the baffle away from the through hole is provided with a guide portion and the inner wall of the barrel cover base, and the guide portion is provided with guide inclined surfaces on both sides of the air inlet channel. The guide inclined surfaces on the guide portion can effectively guide the airflow, avoid direct collision of the airflow on the guide portion, and also eliminate the gas vortex in the air inlet channel, improve the stability of the airflow and reduce the noise.

[0008] As a preferred, the first air inlet is a mesh hole, the second air inlet is an annular distribution inclined hole, and the inclined direction of the second air inlet is towards the baffle along the direction from the bottom to the top of the barrel cover base. The first air inlet is set as a mesh hole, which can enhance the structural strength of the first air inlet and also ensure the air inlet area of the first air inlet. The second air inlet is an annular distribution inclined hole and inclined towards the baffle, and the installation groove is used to install the fan assembly and other structures. In this way, the second air inlet can effectively guide the airflow between the inner wall of the baffle and the fan assembly, which can effectively cool the fan motor and other structures, and also avoid the airflow from the second air inlet directly impacting on the shell of the fan assembly, thereby avoiding the generation of noise.

[0009] As preferred, a plurality of mounting seats are arranged circumferentially in the mounting groove, and the mounting seats are arranged at the periphery of the second air inlet hole. The mounting groove is used for mounting the fan assembly, the mounting seats are support components of the fan assembly, and the mounting seats can be used for fixing the fan assembly. In order to avoid the mounting seats interfering with or blocking the second air inlet hole, the mounting seats are arranged at the periphery of the second air inlet hole.

[0010] As preferred, a cover assembly is arranged on the cover base, a layer plate corresponding to the air inlet channel is arranged on the cover assembly, and a first air outlet hole corresponding to the guide part is arranged on the layer plate. The layer plate is a sealing structure of the top of the air inlet channel, and the first air outlet hole on the layer plate can guide the airflow in the air inlet channel to the air outlet channel and discharge the airflow.

[0011] As preferred, a sealing plate is arranged above the layer plate, an air outlet channel is formed between the sealing plate and the layer plate, and a second air outlet hole is arranged on the air outlet channel. The air outlet channel formed between the sealing plate and the layer plate is used for discharging the gas continuously sucked in the barrel, so that the stable and continuous working of the dust collector can be realized, and the second air outlet hole is a final discharge port of the gas.

[0012] As preferred, the cover assembly further comprises a containing part corresponding to the mounting groove, and a cavity of the containing part faces a cavity of the mounting groove. The mounting groove on the cover base and the containing part on the cover assembly can form a space for mounting the fan, the motor and other structures, and provide mounting space for the fan assembly and other structures.

[0013] As preferred, the first air inlet hole is arranged at a position lower than that of the second air inlet hole. The position of the first air inlet hole is relatively lower than that of the second air inlet hole, so that a counterbore type structure can be formed at the position of the first air inlet hole, the fan assembly and other structures can be effectively positioned as a whole, and the first air inlet hole can be effectively aligned with the fan, so that the fan assembly can suck the airflow.

[0014] As preferred, a reinforcing rib is arranged on the sealing plate. The reinforcing rib on the sealing plate can enhance the structural strength of the sealing plate.

[0015] Compared with the prior art, the dust collector has the following beneficial effects: (1) the structure is reasonable, a streamline gas channel is adopted, and the vortex in the gas channel is eliminated, so that the noise reduction effect of the dust collector is effectively improved; (2) while the noise reduction effect is realized, the fan assembly and other structures inside the dust collector can be cooled; and (3) the structure arrangement inside the dust collector is simplified, the use of a silencer and other structures is avoided, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a perspective view of the cover base of the dust collector.

[0017] Fig. 2This is a top view of the bucket lid base of this utility model.

[0018] Fig. 3 This is a cross-sectional view of the bucket lid base of this utility model.

[0019] Fig. 4 This is a top view of the bucket lid base and bucket lid assembly of this utility model during assembly.

[0020] Fig. 5 This is a schematic diagram showing the layout of the bucket lid base of this utility model on a vacuum cleaner.

[0021] Fig. 6 This is a schematic diagram of the sealing plate structure of this utility model.

[0022] In the diagram: 1. Bucket lid base, 2. Mounting groove, 3. First air inlet, 4. Second air inlet, 5. Partition, 6. Through hole, 7. Air inlet channel, 8. Guide part, 9. Guide slope, 10. Mounting seat, 11. Bucket lid assembly, 12. Shelf, 13. First exhaust hole, 14. Second exhaust hole, 15. Sealing plate, 16. Exhaust channel, 17. Receiving part, 18. Reinforcing rib, 19. Rib, 20. Bucket body. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0024] Example 1: As Figs. 1-3 The illustration shows a vacuum cleaner canister base. The canister base 1 is a connecting structure between the vacuum cleaner canister and the canister lid. The canister base 1 is generally circular and has a mounting groove 2. The mounting groove 2 is recessed towards one side of the vacuum cleaner canister and is eccentrically positioned on the canister base 1. The mounting groove 2 consists of the bottom of the canister base 1 and a partition 5 disposed on the canister base 1. Specifically, the partition 5 is provided on the canister base 1 and is cylindrical in shape. The bottom of the canister base 1 and the inner side of the partition 5 together form the mounting groove 2. A first air inlet 3 and a second air inlet 4 are also provided at the bottom of the mounting groove 2. The canister base 1 is also a recessed structure. A certain gap is maintained between the partition 5 and the inner wall of the canister base 1. A through hole 6 is also provided on the partition 5. The through hole 6 is a rectangular opening from the bottom to the top of the partition 5, thereby forming an air intake channel 7 between the partition 5 and the inner wall of the canister base 1.

[0025] When the dust collector starts to work, the dust collector inhales the air flow into the barrel body of the dust collector, and leaves the dust garbage and other objects in the barrel body of the dust collector, and the gas in the barrel body enters the position where the mounting groove 2 is located through the first air inlet hole 3 and the second air inlet hole 4 on the barrel cover base 1, and then enters the air inlet channel 7 through the through hole 6 on the partition plate 5; wherein, since the mounting groove is eccentrically arranged on the barrel cover base 1, that is, the partition plate 5 is also eccentrically arranged on the barrel cover base 1, so that the distance between the side wall of the partition plate 5 and the inner wall of the barrel cover base 1 is not equal, that is, the radial size of the air inlet channel 7 gradually changes, specifically, the side of the partition plate 5 provided with the through hole 6 is closest to the inner wall of the barrel cover base 1, the radial size of the air inlet channel 7 is smaller near the position where the through hole 6 is located, and the radial size of the air inlet channel 7 is larger away from the position where the through hole 6 is located, so that when the gas enters the air inlet channel 7 from the through hole 6, the air pressure of the air inlet channel 7 on the side close to the position where the through hole 6 is located is greater than the air pressure of the air inlet channel 7 on the side away from the position where the through hole 6 is located, which can better guide the air flow, and as the air flow moves along the air inlet channel 7, the size of the air inlet channel 7 gradually increases, forming a streamline structure, and the flow rate of the air flow also gradually decreases, which can better reduce the noise of the air flow.

[0026] The first air inlet hole 3 and the second air inlet hole 4 are arranged in the mounting groove 2 of the barrel cover base 1, the first air inlet hole 3 is arranged at the middle position of the mounting groove 2, and the second air inlet hole 4 is an annular hole and is arranged at the outer periphery of the first air inlet hole 3; the first air inlet hole 3 is a circular distributed mesh structure, the mounting groove 2 on the barrel cover base 1 is used for mounting the fan assembly of the dust collector, when the dust collector works, the fan assembly operates to suck the air flow in the barrel body to the barrel cover base 1, and finally discharges the excess gas through the barrel cover base 1; the first air inlet hole 3 is arranged at the middle position of the mounting groove 2, so that the first air inlet hole 3 can be aligned with the fan assembly, which is conducive to the air flow entering the barrel cover base 1, and can reduce the noise caused by the collision of the air flow, in addition, the air flow entering the mounting groove 2 from the first air inlet hole 3 can also cool the fan assembly. The second air inlet hole 4 is arranged at the outer periphery position of the first air inlet hole 3, and the second air inlet hole 4 is designed as an inclined hole, and the inclination direction of the second air inlet hole 4 is inclined to the inner wall of the partition plate 5 from bottom to top, so that when the air flow in the barrel body enters the mounting groove 2 from the second air inlet hole 4, the air flow will be guided to the space between the fan assembly and the inner wall of the partition plate 5 under the action of the inclined surface, so that the direct collision of the air flow with the shell of the fan assembly can be effectively avoided, the noise is reduced, and the part of the air flow can also cool the mounting groove 2 and the outside of the fan assembly.

[0027] The first air inlet hole 3 is located lower than the second air inlet hole 4, so that a counterbore type structure can be formed at the position of the first air inlet hole 3, which can effectively position the fan assembly and align the first air inlet hole 3 with the fan, facilitating the fan assembly to suck air flow.

[0028] Three groups of mounting seats 10 are arranged in the mounting groove 2, which are arranged at the bottom of the mounting groove 2 and located at the outer periphery of the second air inlet hole 4, so as to avoid interference between the mounting seat 10 and the second air inlet hole 4. The mounting seats 10 are arranged in a ring shape and uniformly in the mounting groove 2, which can provide stable and good support effect for the fan assembly. In addition, the arrangement of the mounting seat 10 can also improve the structural strength of the partition plate 5 and avoid deformation of the partition plate 5. Further, vertical ribs 19 are arranged on the inner wall of the partition plate 5, and vertical mounting holes are arranged on the ribs 19. The ribs 19 not only strengthen the structural strength of the partition plate 5, but also provide mounting positions for the bucket cover assembly.

[0029] A guide portion 8 is arranged on the side of the air inlet channel 7 away from the through hole 6, which is a wedge-shaped structure. The guide portion 8 extends to the air inlet channel 7 on both sides and forms a guide slope 9. The design of the guide slope 9 can effectively guide the air flow and avoid direct collision of the air flow on the guide portion 8. At the same time, it can also eliminate the gas vortex in the air inlet channel 7, improve the stability of the air flow and reduce the noise.

[0030] Embodiment 2: a dust collector bucket cover base as shown in Figs. 1-6 The bucket cover base 1 is a connecting structure between the dust collector bucket body and the bucket cover. The bucket cover base 1 is circular as a whole. An installation groove 2 is arranged on the bucket cover base 1. The installation groove 2 is sunken to one side of the dust collector bucket body 20. The installation groove 2 is eccentrically arranged on the bucket cover base 1. The installation groove 2 is composed of the bottom of the bucket cover base 1 and a partition plate 5 arranged on the bucket cover base 1. Specifically, the partition plate 5 is arranged on the bucket cover base 1 in a cylindrical shape. The bottom of the bucket cover base 1 and the inner side of the partition plate 5 together form the installation groove 2. First and second air inlet holes 3 and 4 are arranged at the bottom of the installation groove 2. The bucket cover base 1 is also a sunken structure. The partition plate 5 is spaced apart from the inner wall of the bucket cover base 1. A through hole 6 is arranged on the partition plate 5. The through hole 6 is a rectangular opening from the bottom of the partition plate 5 to the top of the partition plate 5, so that the partition plate 5 and the inner wall of the bucket cover base 1 can form an air inlet channel 7.

[0031] When the dust collector starts to work, the dust collector inhales the air flow into the inside of the barrel 20 of the dust collector, and leaves the dust garbage and other objects in the barrel 20 of the dust collector, and the gas in the barrel 20 enters the position where the mounting groove 2 is located through the first air inlet hole 3 and the second air inlet hole 4 on the barrel cover base 1, and then enters the air inlet channel 7 through the through hole 6 on the partition plate 5; wherein, since the mounting groove is eccentrically arranged on the barrel cover base 1, that is, the partition plate 5 is also eccentrically arranged on the barrel cover base 1, so that the distance between the side wall of the partition plate 5 and the inner wall of the barrel cover base 1 is not equal, that is, the radial size of the air inlet channel 7 gradually changes, specifically, the side of the partition plate 5 provided with the through hole 6 is closest to the inner wall of the barrel cover base 1, that is, the radial size of the air inlet channel 7 is smaller near the position where the through hole 6 is located, while the radial size of the air inlet channel 7 is larger away from the position where the through hole 6 is located, so that when the gas enters the air inlet channel 7 from the through hole 6, the air pressure of the air inlet channel 7 on the side close to the position where the through hole 6 is located is greater than the air pressure of the air inlet channel 7 on the side away from the position where the through hole 6 is located, which can better guide the air flow, and as the air flow moves along the air inlet channel 7, the size of the air inlet channel 7 gradually increases, forming a streamline structure, and the flow rate of the air flow will gradually decrease, which can better reduce the noise of the air flow.

[0032] The first air inlet hole 3 and the second air inlet hole 4 are arranged in the mounting groove 2 of the barrel cover base 1, the first air inlet hole 3 is arranged at the middle position of the mounting groove 2, and the second air inlet hole 4 is an annular hole and is arranged at the outer periphery of the first air inlet hole 3, the first air inlet hole 3 is a circularly distributed mesh structure, and the mounting groove 2 on the barrel cover base 1 is used to mount the fan assembly of the dust collector, when the dust collector works, the fan assembly operates to suck the air flow in the barrel 20 to the barrel cover base 1, and finally discharges the excess gas through the barrel cover base 1; the first air inlet hole 3 is arranged at the middle position of the mounting groove 2, so that the first air inlet hole 3 can be aligned with the fan assembly, which is conducive to the air flow entering the barrel cover base 1, and can reduce the noise caused by the collision of the air flow, in addition, the air flow entering the mounting groove 2 from the first air inlet hole 3 can also cool the fan assembly. The second air inlet hole 4 is arranged at the outer periphery of the first air inlet hole 3, and the second air inlet hole 4 is designed as an inclined hole, and the inclination direction of the second air inlet hole 4 is inclined to the inner wall of the partition plate 5 from bottom to top, so that when the air flow in the barrel 20 enters the mounting groove 2 from the second air inlet hole 4, the air flow will be guided to the space between the fan assembly and the inner wall of the partition plate 5 under the action of the inclined surface, so that the direct collision of the air flow with the shell of the fan assembly can be effectively avoided, the noise is reduced, and this part of the air flow can also cool the mounting groove 2 and the outside of the fan assembly.

[0033] The first air inlet hole 3 is located lower than the second air inlet hole 4, so that a counterbore type structure can be formed at the position of the first air inlet hole 3, which can effectively position the fan assembly and the like as a whole, and can effectively align the first air inlet hole 3 with the fan, facilitating the fan assembly to suck air flow.

[0034] Three groups of mounting seats 10 are further arranged in the mounting groove 2, and the mounting seats 10 are arranged at the bottom of the mounting groove 2 and located at the outer periphery of the second air inlet hole 4, so that the mounting seats 10 can avoid interfering with the second air inlet hole 4. The mounting seats 10 are arranged in a ring shape and uniformly in the mounting groove 2, which can provide stable and good support effect for the fan assembly. In addition, the arrangement of the mounting seats 10 can also improve the structural strength of the partition plate 5, so as to avoid deformation of the partition plate 5. Further, vertical ribs 19 are arranged on the inner wall of the partition plate 5, and vertical mounting holes are arranged on the ribs 19. The ribs 19 not only strengthen the structural strength of the partition plate 5, but also provide mounting positions for the bucket cover assembly.

[0035] A guide portion 8 is arranged on the side of the air inlet channel 7 away from the through hole 6, and the guide portion 8 is a wedge-shaped structure. The guide portion 8 extends to the air inlet channel 7 on both sides and forms a guide slope 9. The design of the guide slope 9 can effectively guide the air flow and avoid direct collision of the air flow on the guide portion 8. At the same time, the guide slope 9 can also eliminate the gas vortex in the air inlet channel 7, improve the stability of the air flow and reduce noise.

[0036] The bottom of the bucket cover base 1 is a bucket body 20 structure, and the bucket cover assembly 11 is arranged above the bucket cover base 1. The bucket cover base 1 is clamped on the bucket body 20 and is fixedly connected by screws and the like. The bucket cover assembly 11 includes a layer plate 12, which is located above the air inlet channel 7. The air inlet channel 7 is composed of the outer wall of the partition plate 5, the bottom of the bucket cover base 1, the inner wall of the bucket cover base 1 and the layer plate 12. A first air outlet hole 13 is arranged on the layer plate 12 corresponding to the position of the guide portion 8. The length of the first air outlet hole 13 is close to the sum of the lengths of the guide slopes 9 on both sides of the guide portion 8. When the air flow in the air inlet channel 7 begins to climb along the guide slope 9, part of the air flow can be discharged through the first air outlet hole 13. This can avoid the phenomenon that the guide slope 9 makes the size of the air inlet channel 7 smaller and the pressure increases, so that the flow rate of the air flow can still be maintained at a low speed, reducing the generation of noise.

[0037] A back sealing plate 15 is further arranged above the layer plate 12, and the bucket cover assembly 11 further comprises a receiving part 17 which is arranged at the middle part of the bucket cover assembly 11 and protrudes upward, the position of the receiving part 17 is higher than the position of the layer plate 12, the sealing plate 15 is arranged on the outer side wall of the receiving part 17 and the edge of the bucket cover assembly 11, so that the exhaust passage 16 is formed between the sealing plate 15 and the layer plate 12, the receiving part 17 is hollow, and the position of the receiving part 17 corresponds to the position of the mounting groove 2, so as to provide a mounting space for the fan assembly. A reinforcing rib 18 is further arranged on the sealing plate 15, which can enhance the structural strength of the sealing plate 15.

[0038] The outermost circle of the bucket cover assembly 11 is also a cylindrical thin plate structure, and corresponds to the exhaust passage 16, the thin plate is provided with a second exhaust hole 14, the second exhaust hole 14 is provided with two and respectively located at both ends of the exhaust passage 16, when the airflow in the air inlet passage 7 rises from the position of the guide part 8 to the first exhaust hole 13 and enters the exhaust passage 16, the airflow will move to both sides, which can effectively reduce the air pressure in the exhaust passage 16, avoid the noise caused by too large air flow rate; finally the gas will be discharged from the second exhaust hole 14, to ensure the continuous and stable operation of the dust collector. The first exhaust hole 13 and the second exhaust hole 14 are further provided with sound-absorbing cotton material, which can further reduce the noise of the airflow.

Claims

1. A vacuum cleaner bucket lid base, characterized in that, The barrel cover base is provided with an eccentric installation slot, the bottom of the installation slot is provided with a first air inlet hole and a second air inlet hole distributed in a ring shape outside the first air inlet hole, the outer edge of the installation slot is provided with a partition plate, the partition plate is provided with a through hole and forms an air inlet channel with the inner wall of the barrel cover base.

2. A dust cup cover base according to claim 1, wherein The distance from the through hole to the inner wall of the barrel cover base is less than the distance from the partition plate to the inner wall of the barrel cover base.

3. The dust cup cover base of claim 1, wherein, The side of the partition plate away from the through hole is provided with a guide portion relative to the inner wall of the barrel cover base, and the guide portion is provided with guide inclined surfaces on both sides in the air inlet channel.

4. The dust cup cover base of claim 1, wherein, The first air inlet hole is a mesh hole, the second air inlet hole is an inclined hole distributed in a ring shape, and the inclined direction of the second air inlet hole is towards the partition plate from the bottom to the top of the barrel cover base.

5. The dust cup cover base of claim 1, wherein, A plurality of installation seats are arranged in the circumferential direction of the installation slot, and the installation seats are arranged outside the second air inlet hole.

6. A dust cup cover base according to claim 3, wherein The barrel cover base is provided with a barrel cover assembly, the barrel cover assembly is provided with a layer plate corresponding to the air inlet channel, and the layer plate is provided with a first exhaust hole corresponding to the guide portion.

7. A dust cup cover base according to claim 6, wherein An enclosing plate is arranged above the layer plate, an exhaust channel is formed between the enclosing plate and the layer plate, and a second exhaust hole is arranged in the exhaust channel.

8. A dust cup base according to claim 6 or 7, wherein, The barrel cover assembly further comprises a containing portion corresponding to the installation slot, and the cavity of the containing portion faces the cavity of the installation slot.

9. A dust cup cover base according to any one of claims 1 to 7, wherein The position of the first air inlet hole is lower than the position of the second air inlet hole.

10. The dust cup cover base of claim 7, wherein, The enclosing plate is provided with a reinforcing rib.

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