Cyclone dust collector with secondary dust bin

Abstract

The invention discloses a cyclone dust collector with a secondary dust bin. The cyclone dust collector comprises a primary dust bin, a suction barrel, the secondary dust bin and an air exhaust module, the primary dust bin is cylindrical, comprises a closed first end plate and is provided with a tangential air inlet; the suction cylinder is communicated with the tangential air inlet; the secondary dust bin is connected with the primary dust bin and is separated from the primary dust bin through a second end plate; a filter screen is arranged in the secondary dust bin; the air exhaust module is used for driving airflow to sequentially pass through the suction barrel, the tangential air inlet, the first air outlet, the filter screen, the second air outlet and the exhaust port to flow outwards and be exhausted. By means of the structure, a large amount of dust is separated in the first-stage dust bin before entering the filter screen, the dust load of the filter screen is remarkably reduced, blocking of a filter system is effectively avoided, the dust collector can still keep stable suction force in the long-time use process, and the use experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of vacuum cleaner technology, and more particularly to a cyclone two-stage dustbin vacuum cleaner. Background Technology

[0002] Traditional vacuum cleaners typically employ a single-stage dustbin structure, integrating the filtration system (such as a HEPA filter) and the dust collection bin into the same chamber. During vacuuming, the dust-laden airflow directly enters the dustbin and rapidly contacts the filtration system, easily clogging the filter mesh. As the volume of dust collected increases, the clogging worsens, significantly reducing airflow capacity and suction power, resulting in a poor user experience. Furthermore, when vacuuming damp dust or liquids, the dust tends to cake on the filter surface, further reducing filtration efficiency. Users need to frequently replace or clean the filter, leading to higher operating costs. While some vacuum cleaners on the market utilize cyclone separators, their cyclone separator chamber and filtration system remain in the same space, failing to effectively reduce the proportion of dust reaching the filtration system, thus not fundamentally addressing the problem of dust clogging the filter. Therefore, it is necessary to provide a cyclone-based, two-stage dustbin vacuum cleaner to overcome these shortcomings. Summary of the Invention

[0003] The purpose of this invention is to provide a cyclone two-stage dustbin vacuum cleaner, which aims to solve the problem of how to effectively reduce the proportion of dust in the vacuum cleaner that reaches the filtration system, reduce the clogging of the filtration system, and ensure that the vacuum cleaner maintains stable suction power during long-term use.

[0004] To achieve the above objectives, the present invention provides a cyclone two-stage dustbin vacuum cleaner, comprising: A primary dust chamber, which is cylindrical and includes a closed first end plate; a tangential air inlet is provided on the side of the primary dust chamber away from the first end plate. A suction cylinder is fixed to the outer surface of the primary dust chamber, and one end of the suction cylinder is connected to the tangential air inlet. A secondary dust bin is connected to the primary dust bin and separated from it by a second end plate; the secondary dust bin is equipped with a filter screen; the second end plate has a first air outlet coaxially formed; and the end of the secondary dust bin furthest from the primary dust bin has a second air outlet. An air extraction module is located at the end of the secondary dust chamber away from the primary dust chamber and has an exhaust port. The air extraction module is used to drive the airflow to flow outward and discharge sequentially through the suction cylinder, the tangential air inlet, the first air outlet, the filter screen, the second air outlet, and the exhaust port.

[0005] In a preferred embodiment, a ventilator extending into the primary dust chamber is coaxially provided on the side of the second end plate near the first end plate; the vertical projection of the ventilator relative to the second end plate is defined as the first projection; the first air outlet is located within the first projection.

[0006] In a preferred embodiment, a baffle is provided at one end of the ventilator near the first end plate, and a plurality of filter holes are provided on the side of the ventilator; the vertical projection of the baffle relative to the second end plate is defined as the second projection; the first projection is completely located within the second projection.

[0007] In a preferred embodiment, the baffle is bent or flexed in a direction away from the vent to form a conical or arcuate surface.

[0008] In a preferred embodiment, a windbreak ring is provided on the side of the second end plate near the first end plate, and the vent is located inside the windbreak ring; the vertical projection of the windbreak ring relative to the inner wall of the primary dust chamber completely covers the tangential air inlet.

[0009] In a preferred embodiment, the primary dust bin includes a cylindrical first connecting seat and a cyclone hood detachably fitted onto the first connecting seat; the first end plate is located at the end of the cyclone hood away from the first connecting seat; the air inlet is opened on the side of the first connecting seat; and the suction cylinder is fixedly connected to the first connecting seat.

[0010] In a preferred embodiment, the primary dust chamber is detachably fitted onto one end of the secondary dust chamber; the secondary dust chamber is detachably fitted onto one end of the extraction module.

[0011] In a preferred embodiment, a second connecting seat is provided on the outer side of the secondary dust bin, and the second connecting seat is rotatably connected to the first connecting seat via a rotating seat; a locking rod is provided on the side of the first connecting seat away from the rotating seat, and an elastic snap is provided on the side of the secondary dust bin away from the second connecting seat; the elastic snap is used to engage with the locking rod to abut and fix the primary dust bin and the secondary dust bin.

[0012] In a preferred embodiment, the first connecting seat has a limiting groove on one edge near the secondary dust bin, and the edge of the second end plate has a flange that matches the limiting groove; when the elastic snap is engaged with the locking rod, the secondary dust bin presses the flange into the limiting groove.

[0013] In a preferred embodiment, the air extraction module includes a fixed cylinder connected to the secondary dust chamber, a handle disposed on the side of the fixed cylinder, and a first fixed seat and a second fixed seat disposed on the side of the fixed cylinder near the secondary dust chamber; the filter screen is disposed on the first fixed seat, and the second fixed seat is provided with a motor and a fan blade; the handle is provided with a circuit board and a battery, and the circuit board is electrically connected to the battery and the motor respectively.

[0014] The cyclone two-stage dustbin vacuum cleaner provided by this invention, after the extraction module is activated, drives the airflow from the suction cylinder into the first-stage dustbin through the tangential air inlet. Since the tangential air inlet is located on the side of the first-stage dustbin, the airflow enters tangentially along the inner wall of the first-stage dustbin, forming a high-speed circumferential spiral airflow within the cylindrical space of the first-stage dustbin. Dust and other debris are thrown towards the inner wall of the first-stage dustbin under centrifugal force and spiral down along the inner wall, gradually settling at the bottom of the first-stage dustbin. When the spiral airflow reaches the first end plate, a counter-rotating central flow is formed in the central area. This central flow carries very little dust and then enters the second-stage dustbin through the first air outlet coaxially opened on the second end plate. Inside the second-stage dustbin, the airflow undergoes secondary filtration through a filter screen and is then discharged outwards through the second air outlet and the exhaust port of the extraction module. With the above structure, dust is largely separated in the primary dust chamber before entering the filter, significantly reducing the dust load on the filter and effectively preventing clogging of the filtration system. This allows the vacuum cleaner to maintain stable suction power even during prolonged use, improving the user experience. Tests show that for every 40g of dust sucked up, only about 1g enters the secondary dust chamber, demonstrating extremely high separation efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A perspective view of the cyclone two-stage dustbin vacuum cleaner provided by the present invention; Figure 2 for Figure 1 The image shows a longitudinal half-section perspective view of the cyclone two-stage dust chamber vacuum cleaner. Figure 3 for Figure 1 The diagram shown is an exploded 3D view of a cyclone two-stage dust chamber vacuum cleaner. Figure 4 for Figure 3 The exploded 3D view of the cyclone two-stage dust chamber vacuum cleaner from another angle; Figure 5 for Figure 3The exploded front view of the longitudinal half-section of the cyclone two-stage dust chamber vacuum cleaner is shown.

[0017] The diagram is labeled as follows: 10. Primary dust chamber; 11. First end plate; 12. Tangential air inlet; 13. First connecting seat; 14. Cyclone shroud; 15. Locking rod; 16. Limiting groove; 20. Suction cylinder; 30. Secondary dust bin; 31. Second end plate; 32. First air outlet; 33. Filter screen; 34. Second air outlet; 35. Second connecting seat; 36. Elastic snap; 37. Flange; 40. Air extraction module; 41. Exhaust port; 42. Fixing cylinder; 43. Motor; 44. Fan blade; 45. First fixing seat; 46. Second fixing seat; 50. Vent pipe; 51. Baffle plate; 52. Filter hole; 53. Windshield ring; 60. Rotating base; 70. Handle; 71. Circuit board; 72. Battery. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the invention and are not intended to limit the invention.

[0019] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] In an embodiment of the present invention, a cyclone two-stage dustbin vacuum cleaner is provided. By setting up an independent primary dustbin 10 and a secondary dustbin 30 and optimizing the airflow path, most of the dust is separated and settled in the primary dustbin 10, and only a very small amount of fine dust carried by the airflow enters the secondary dustbin 30. This can effectively reduce the amount of dust entering the filtration system (e.g., HEPA filter), delay the clogging of the filtration system, thereby maintaining stable suction and extending the service life of the filtration system.

[0022] like Figures 1-5 As shown, the cyclone two-stage dustbin vacuum cleaner includes a primary dustbin 10, a suction cylinder 20, a secondary dustbin 30, and an air extraction module 40.

[0023] The primary dust chamber 10 is cylindrical in shape, with one end sealed by a closed first end plate 11. In this embodiment, the primary dust chamber can be made transparent to allow observation of the collection of dust and debris inside. A tangential air inlet 12 is provided on the side of the primary dust chamber 10 away from the first end plate 11. The suction cylinder 20 is fixedly installed on the outer surface of the primary dust chamber 10, with one end connected to the tangential air inlet 12, allowing the dust-laden airflow to enter the interior of the primary dust chamber 10 along the tangential direction, forming the basis of a circumferential spiral airflow.

[0024] The secondary dust chamber 30 is separated from the primary dust chamber 10 by a second end plate 31, and a filter 33 (e.g., a HEPA filter) is installed inside each secondary dust chamber 30. Both the secondary and primary dust chambers are cylindrical and coaxially arranged. The extraction module 40 is located at the end of the secondary dust chamber 30 furthest from the primary dust chamber 10.

[0025] Specifically, the air extraction module 40 contains a motor 43 and a fan blade 44, and has an exhaust port 41. When the air extraction module 40 is started, the negative pressure driving airflow generated by it flows sequentially through the suction cylinder 20 and the tangential air inlet 12, and enters the primary dust chamber 10.

[0026] The specific implementation principle is as follows: The airflow enters the primary dust chamber 10 tangentially, forming a high-speed rotating circumferential spiral airflow on the inner wall of the cylindrical primary dust chamber 10. Under the action of centrifugal force, large dust particles and debris carried in the airflow are thrown against the chamber wall and settle at the bottom or side wall of the primary dust chamber 10 due to gravity, thus achieving primary separation. At this time, after being blocked and guided by the first end plate 11, a central airflow with extremely low dust content and reverse rotation is formed at the center of the spiral airflow. This airflow enters the secondary dust chamber 30, which is connected to the primary dust chamber 10, through the first outlet 32 ​​opened on the second end plate 31. After entering the secondary dust chamber 30, the airflow first passes through the filter screen 33, during which residual fine dust is further intercepted. The clean airflow then passes through the second outlet 34 opened at the end of the secondary dust chamber 30 away from the primary dust chamber 10, and finally exits from the exhaust port 41 of the extraction module 40. This two-stage separation structure significantly reduces the amount of dust entering the filter 33 through primary centrifugal separation. Tests show that for every 40g of dust sucked up, only about 1g enters the secondary dust chamber 30, effectively preventing rapid clogging of the filter 33 and ensuring sustained and stable suction.

[0027] Furthermore, combined Figure 2 , Figure 3 and Figure 5As shown, to optimize the airflow from the primary dust chamber 10 to the secondary dust chamber 30, a ventilator 50 extending into the primary dust chamber 10 is coaxially disposed on the side of the second end plate 31 near the first end plate 11. Here, the vertical projection of the ventilator 50 relative to the second end plate 31 is defined as the first projection. The first air outlet 32 ​​is located within this first projection, thereby surrounding the first air outlet 32 ​​with the ventilator 50.

[0028] The ventilator 50 has a baffle 51 at the end near the first end plate 11, and multiple filter holes 52 are formed on the side of the ventilator 50. The vertical projection of the baffle 51 relative to the second end plate 31 is defined as the second projection, and the first projection is entirely within the second projection. Therefore, the central airflow first impacts the baffle 51, preventing the airflow from directly impacting the bottom of the ventilator 50 and causing turbulence. The baffle 51 guides the airflow in all directions, allowing it to smoothly pass through the array of filter holes 52 on the side of the ventilator 50 before entering the interior of the ventilator 50 and finally exiting through the first outlet 32. This process further stabilizes the flow and provides secondary filtration, allowing only fine airflow to pass through.

[0029] Furthermore, combined Figure 2 As shown, the baffle 51 is bent or flexed in a direction away from the vent 50 to form a conical or arc-shaped surface. This shape helps to convert the rotational kinetic energy of the spiral airflow into forward translational kinetic energy, allowing the airflow to pass through the filter hole 52 more smoothly and reducing flow resistance.

[0030] Furthermore, a baffle ring 53 is provided on the side of the second end plate 31 near the first end plate 11, and the vent 50 is located inside the baffle ring 53. The vertical projection of the baffle ring 53 relative to the inner wall of the primary dust chamber 10 completely covers the tangential air inlet 12. Therefore, when the airflow enters at high speed from the tangential air inlet 12, it can effectively prevent the airflow from directly impacting the vent 50, ensuring that the airflow can smoothly form a spiral motion along the inner wall of the primary dust chamber 10, thereby ensuring the efficiency of centrifugal separation.

[0031] In one embodiment, to facilitate user cleaning of accumulated dust, the vacuum cleaner is structurally designed with multiple detachable sections. Specifically, the primary dust chamber 10 includes a cylindrical first connecting seat 13 and a cyclone shroud 14 detachably fitted onto the first connecting seat 13. A first end plate 11 is located at the end of the cyclone shroud 14 furthest from the first connecting seat 13, while a tangential air inlet 12 is located on the side of the first connecting seat 13. The suction cylinder 20 is fixedly connected to the first connecting seat 13. This structure allows the user to easily clean the dust settled inside the primary dust chamber 10 simply by removing the cyclone shroud 14 from the first connecting seat 13.

[0032] Furthermore, the entire vacuum cleaner body is also connected in a segmented, nested manner. The primary dust chamber 10 is detachably nested at one end of the secondary dust chamber 30, while the secondary dust chamber 30 is detachably nested at one end of the extraction module 40, making it convenient for users to perform independent maintenance on each module, such as replacing the filter 33.

[0033] To facilitate quick assembly and disassembly and ensure a secure connection, a locking mechanism is provided between the primary dust chamber 10 and the secondary dust chamber 30. Specifically, a second connecting seat 35 is provided on the outer side of the secondary dust chamber 30, which is rotatably connected to the first connecting seat 13 via a rotating seat 60. A locking rod 15 is provided on the side of the first connecting seat 13 away from the rotating seat 60, and a resilient snap 36 is provided on the side of the secondary dust chamber 30 away from the second connecting seat 35. During operation, the user can first rotate the primary dust chamber 10 around the rotating seat 60 to close it with the secondary dust chamber 30, and then press the resilient snap 36 to engage it with the locking rod 15, thereby securing the primary dust chamber 10 and the secondary dust chamber 30 together.

[0034] Furthermore, to ensure airtightness at the connection point, the first connecting seat 13 has a limiting groove 16 on its edge near the secondary dust chamber 30, while the edge of the second end plate 31 has a matching flange 37. When the elastic snap 36 engages with the locking rod 15, the secondary dust chamber 30 will tightly press the flange 37 into the limiting groove 16, forming a reliable seal. This also allows the secondary dust chamber 30 to press the flange 37 into the limiting groove 16, thereby pressing the second end plate 31 against one end of the primary dust chamber 10.

[0035] Combination Figure 2 , Figure 3 and Figure 5 As shown, the suction module 40 includes a fixed cylinder 42 connected to the secondary dust chamber 30, and a handle 70 disposed on the side of the fixed cylinder 42. On the side of the fixed cylinder 42 near the secondary dust chamber 30, there are a first fixed seat 45 and a second fixed seat 46. The filter screen 33 is mounted on the first fixed seat 45, while the motor 43 and fan blades 44 are mounted on the second fixed seat 46. To facilitate handheld operation and make full use of the internal space, the handle 70 has a cavity inside to accommodate the circuit board 71 and the battery 72. The circuit board 71 is electrically connected to both the battery 72 and the motor 43, providing power for the entire vacuum cleaner. Specifically, the battery 72 supplies power to the motor 43, and the circuit board 71 controls the operation of the motor 43. The motor 43 drives the fan blades 44 to rotate, generating negative pressure to achieve the suction function.

[0036] In summary, the cyclone two-stage dustbin vacuum cleaner provided by this invention, after the extraction module 40 is activated, drives the airflow from the suction cylinder 20 into the interior of the primary dustbin 10 through the tangential air inlet 12. Since the tangential air inlet 12 is located on the side of the primary dustbin 10, the airflow enters tangentially along the inner wall of the primary dustbin 10, forming a high-speed circumferential spiral airflow within the cylindrical space of the primary dustbin 10. Dust and other debris are thrown towards the inner wall of the primary dustbin 10 under centrifugal force and spiral down along the inner wall, gradually depositing at the bottom or side wall of the primary dustbin. When the spiral airflow reaches the first end plate 11, a counter-rotating central flow is formed in the central region. This central flow carries very little dust and then enters the secondary dustbin 30 through the first air outlet 32 ​​coaxially opened on the second end plate 31. Inside the secondary dustbin 30, the airflow first undergoes secondary filtration through the filter screen 33, and then is discharged outwards through the second air outlet 34 and the exhaust port 41 of the extraction module 40. With the above structure, dust is largely separated in the primary dust chamber 10 before entering the filter 33, significantly reducing the dust load on the filter 33, effectively preventing clogging of the filtration system, and enabling the vacuum cleaner to maintain stable suction power during long-term use, thus improving the user experience.

[0037] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A cyclone two-stage dustbin vacuum cleaner, characterized in that, include: A primary dust chamber, which is cylindrical and includes a closed first end plate; a tangential air inlet is provided on the side of the primary dust chamber away from the first end plate. A suction cylinder is fixed to the outer surface of the primary dust chamber, and one end of the suction cylinder is connected to the tangential air inlet. A secondary dust bin is connected to the primary dust bin and separated from it by a second end plate; the secondary dust bin is equipped with a filter screen; the second end plate has a first air outlet coaxially formed; and the end of the secondary dust bin furthest from the primary dust bin has a second air outlet. An air extraction module is located at the end of the secondary dust chamber away from the primary dust chamber and has an exhaust port. The air extraction module is used to drive the airflow to flow outward and discharge sequentially through the suction cylinder, the tangential air inlet, the first air outlet, the filter screen, the second air outlet, and the exhaust port.

2. The cyclone two-stage dustbin vacuum cleaner as described in claim 1, characterized in that, The second end plate is coaxially provided with a ventilator extending into the primary dust chamber on the side near the first end plate; the vertical projection of the ventilator relative to the second end plate is defined as the first projection; the first air outlet is located within the first projection.

3. The cyclone two-stage dustbin vacuum cleaner as described in claim 2, characterized in that, The ventilator has a baffle plate at one end near the first end plate, and multiple filter holes are provided on the side of the ventilator; the vertical projection of the baffle plate relative to the second end plate is defined as the second projection; the first projection is completely located within the second projection.

4. The cyclone two-stage dustbin vacuum cleaner as described in claim 3, characterized in that, The baffle is bent or flexed in a direction away from the ventilator to form a conical or arc-shaped surface.

5. The cyclone two-stage dustbin vacuum cleaner as described in claim 2, characterized in that, The second end plate is provided with a wind baffle ring on the side near the first end plate, and the vent is located inside the wind baffle ring; the vertical projection of the wind baffle ring relative to the inner wall of the first-stage dust chamber completely covers the tangential air inlet.

6. The cyclone two-stage dustbin vacuum cleaner as described in claim 1, characterized in that, The primary dust chamber includes a cylindrical first connecting seat and a cyclone hood detachably fitted onto the first connecting seat; the first end plate is located at the end of the cyclone hood away from the first connecting seat; the air inlet is opened on the side of the first connecting seat; and the suction cylinder is fixedly connected to the first connecting seat.

7. The cyclone two-stage dustbin vacuum cleaner as described in claim 6, characterized in that, The primary dust chamber is detachably fitted onto one end of the secondary dust chamber; the secondary dust chamber is detachably fitted onto one end of the extraction module.

8. The cyclone two-stage dustbin vacuum cleaner as described in claim 7, characterized in that, The secondary dust bin is provided with a second connecting seat on its outer side, and the second connecting seat is rotatably connected to the first connecting seat through a rotating seat; the first connecting seat is provided with a locking rod on the side away from the rotating seat, and the secondary dust bin is provided with an elastic snap on the side away from the second connecting seat; the elastic snap is used to engage with the locking rod to abut and fix the primary dust bin and the secondary dust bin.

9. The cyclone two-stage dustbin vacuum cleaner as described in claim 8, characterized in that, The first connecting seat has a limiting groove on one side edge near the secondary dust bin, and the edge of the second end plate has a flange that matches the limiting groove; when the elastic snap is engaged with the locking rod, the secondary dust bin presses the flange into the limiting groove.

10. The cyclone two-stage dustbin vacuum cleaner as described in claim 1, characterized in that, The air extraction module includes a fixed cylinder connected to the secondary dust chamber, a handle on the side of the fixed cylinder, and a first fixed seat and a second fixed seat on the side of the fixed cylinder near the secondary dust chamber; the filter screen is disposed on the first fixed seat, and the second fixed seat is provided with a motor and a fan blade; the handle is provided with a circuit board and a battery, and the circuit board is electrically connected to the battery and the motor respectively.

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