Barrel type dust collector with airflow buffering and noise reduction functions

Abstract

The invention discloses a barrel type dust collector with airflow buffering and noise reduction functions, and relates to the technical field of dust collectors. The connecting base is assembled on the barrel body, a filtering assembly is arranged at the bottom of the connecting base, the top of the filtering assembly is in butt joint with a motor, the motor is located in the connecting base, and a motor air outlet in the motor is communicated with the spiral air duct structure in the connecting base; the top cover is assembled on the connecting base, a first air outlet in the top cover communicates with the air outlet end of the spiral air duct structure, an air outlet screen plate is assembled on the first air outlet, and airflow buffering assemblies are arranged in the spiral air duct structure and on the air outlet screen plate. The problem that an existing barrel suction device is large in operation noise can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust collectors, in particular to a barrel type dust collector with air flow buffering and noise reduction function. BACKGROUND

[0002] As a cleaning appliance, barrel type dust collectors, especially some big brands, are known by more and more people. Traditional barrel type dust collectors have the disadvantages of large size and high noise, while low-noise barrel type dust collectors are favored by people because of low noise. Like ordinary barrel type dust collectors, low-noise barrel type dust collectors also rely on high-speed rotation of the motor to form negative pressure to suck dust or garbage into the dust chamber. Since the dust collector motor works at high speed (the speed of brush motor is generally above 30,000 rpm, and the speed of brushless DC motor is as high as 100,000 rpm), its noise value is much larger than that of general household appliances. The noise problem of the dust collector has always been a research topic in the industry.

[0003] Because of its use characteristics, the distance between the barrel type dust collector and the ear is close during operation, and the size of the noise will directly affect the user experience. Low-noise barrel type dust collectors are favored by the public because of low noise. When the mainstream barrel type dust collector on the market is used, the air flow enters the dust collection chamber from the air inlet, then passes through the filter to enter the air duct, and finally is discharged from the air outlet. The shortcoming of the existing design is that the air duct is short, and the air flow buffering and guiding design is not performed on the areas where the air flow parameters (direction, flow rate, etc.) change obviously when the air flow passes through the structure corner in the air duct, so that the wind speed is fast, the air flow impact and disturbance are obvious, and the barrel suction operation noise is large. SUMMARY

[0004] The purpose of the present application is to solve the problem of large noise of the existing barrel suction operation, and to provide a barrel type dust collector with air flow buffering and noise reduction function.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a barrel type dust collector with air flow buffering and noise reduction function, comprising:

[0006] A barrel body provided with an air inlet;

[0007] A connecting seat assembled on the barrel body, provided with a filter assembly at the bottom, the top of the filter assembly being connected to a motor, the motor being located in the connecting seat, and a motor air outlet on the motor being communicated with a spiral air duct structure in the connecting seat;

[0008] A top cover assembled on the connecting seat, a first air outlet on the top cover being communicated with an air outlet end of the spiral air duct structure, an air outlet mesh plate being assembled on the first air outlet, and an air flow buffering assembly being provided in the spiral air duct structure and on the air outlet mesh plate.

[0009] Further description of the above technical scheme:

[0010] The connecting seat includes a base, an air duct assembly, and an upper positioning seat that are connected sequentially from bottom to top. The filter assembly is assembled at the bottom of the base and is sleeved on the bottom of the motor. It is combined with the air duct assembly to form the spiral air duct structure.

[0011] As a further description of the above technical solution:

[0012] The air duct assembly has a spiral boss on the outside of the motor, and a barrier is also provided on its edge. The spiral air duct structure includes an inner spiral air duct and an outer spiral air duct that are joined only at the ends. The spiral surface of the spiral boss is joined with the base to form the inner spiral air duct. The inner spiral air duct goes around the surface of the motor once. The outer side of the spiral boss, the barrier, and the base are joined to form the outer spiral air duct. The first end of the inner spiral air duct is misaligned with the air inlet end of the outer spiral air duct. Its second end is joined with the air inlet end of the outer spiral air duct. The air outlet end of the outer spiral air duct is joined with the air outlet cavity that communicates with the first air outlet.

[0013] As a further description of the above technical solution:

[0014] The cross-sectional area of ​​the internal spiral air duct gradually increases from the first end to the second end.

[0015] As a further description of the above technical solution:

[0016] The inner spiral air duct is located above the air outlet of the motor.

[0017] As a further description of the above technical solution:

[0018] The airflow buffer assembly is provided at the corner of the outer spiral air duct, and the airflow buffer assembly is a sponge.

[0019] As a further description of the above technical solution:

[0020] The cross-sectional area of ​​the air outlet gradually increases along the airflow direction.

[0021] As a further description of the above technical solution:

[0022] The air duct assembly and the extension plate of the upper positioning seat are joined together to form a flow guide shroud. The air duct assembly is provided with a flow passage notch. The part of the outer spiral air duct, the flow passage notch, the inner cavity of the flow guide shroud, and the second air outlet on the top cover surface are connected in sequence. The airflow buffer assembly is arranged on the inner side of the second air outlet.

[0023] As a further description of the above technical solution:

[0024] The motor has several air outlets spaced circumferentially along the surface of the motor, and the airflow flows out tangentially from the motor air outlets along the surface of the motor.

[0025] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0026] 1. The canister vacuum cleaner of this invention achieves efficient airflow buffering and noise reduction functions through a combination of methods. Specifically, firstly, the design of the spiral air duct structure inside the connecting base and the motor outlet greatly increases the duct length. Based on the connection between the first air outlet and the air outlet of the spiral air duct structure, a second air outlet is set, which is partially and indirectly connected to the spiral air duct structure to connect the airflow and achieve a diversion effect, thereby reducing the airflow velocity and thus achieving a noise reduction effect. Secondly, multiple airflow buffer components are set locally in the spiral air duct structure to buffer and guide the airflow in areas where airflow parameters (direction, velocity, etc.) change significantly, such as at structural corners, to avoid excessive noise caused by airflow impact and disturbance. Thirdly, airflow buffer components are set at the first and second air outlets, i.e., the air outlets on the surface of the vacuum cleaner, to achieve a secondary deceleration and buffering effect on the airflow. Through the above-mentioned air duct structure design and airflow buffering treatment at the main noise-generating nodes inside, the noise reduction performance of the canister vacuum cleaner is improved.

[0027] 2. By tangentially directing airflow at multiple points on the motor for diversion, and as the airflow converges within the inner spiral duct, the gas volume at each node along the airflow direction increases, and the cross-sectional area of ​​the flow increases synchronously. This achieves a match between changes in gas volume and expansion of the flow surface, avoiding localized sudden increases in gas volume that could cause airflow disturbance and impact, thus generating significant noise. By placing the inner spiral duct above the motor's air outlet, the airflow is continuously guided upwards. Matching the natural flow trend of the hot airflow with the airflow guidance direction of the inner spiral duct reduces motor energy consumption and airflow disturbance, thereby achieving noise reduction. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a 3D view of a canister vacuum cleaner with airflow buffering and noise reduction functions.

[0030] Figure 2 This is a cross-sectional view of a canister vacuum cleaner with airflow buffering and noise reduction function.

[0031] Figure 3 This is a three-dimensional view of the air duct assembly in a canister vacuum cleaner with airflow buffering and noise reduction function, viewed from below.

[0032] Figure 4 This is a disassembly diagram of a canister vacuum cleaner with airflow buffering and noise reduction functions.

[0033] Figure 5 This is a 3D view of a canister vacuum cleaner with airflow buffering and noise reduction function (exhaust grille is hidden).

[0034] Legend:

[0035] 1. Barrel body; 2. Air inlet; 3. Connecting seat; 4. Filter assembly; 5. Motor; 6. Motor air outlet; 7. Top cover; 8. First air outlet; 9. Air outlet mesh plate; 10. Second air outlet; 11. Airflow buffer assembly; 12. Base; 13. Air duct assembly; 14. Upper positioning seat; 15. Spiral boss; 16. Enclosure; 17. Inner spiral air duct; 18. Outer spiral air duct; 19. Air outlet cavity; 20. Flow guide; 21. Flow notch. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1:

[0042] Please see Figures 1-5 This invention provides a technical solution: a canister vacuum cleaner with airflow buffering and noise reduction function, comprising:

[0043] The barrel body 1 has an air inlet 2;

[0044] A connecting seat 3 is assembled on the barrel 1, and a filter assembly 4 is provided at the bottom of the filter assembly 4. The top of the filter assembly 4 is connected to a motor 5, and the motor 5 is located inside the connecting seat 3. The motor outlet 6 on the motor 5 is connected to the spiral air duct structure inside the connecting seat 3.

[0045] The top cover 7 is assembled on the connecting seat 3. The first air outlet 8 on it is connected to the air outlet end of the spiral air duct structure. An air outlet mesh plate 9 is assembled on the first air outlet 8. An airflow buffer component 11 is provided inside the spiral air duct structure and on the air outlet mesh plate 9.

[0046] The canister vacuum cleaner of this invention achieves efficient airflow buffering and noise reduction functions through a combination of methods. Specifically, firstly, the design of the spiral air duct structure inside the connecting base 3 and the air outlet of the motor 5 greatly increases the length of the air duct; secondly, multiple airflow buffer components 11 are locally set in the spiral air duct structure to buffer and guide the airflow in areas where airflow parameters (direction, velocity, etc.) change significantly, such as at structural corners, avoiding excessive noise caused by airflow impact and disturbance; thirdly, airflow buffer components 11 are set at the first air outlet 8, i.e., the air outlet on the surface of the vacuum cleaner, to achieve a secondary deceleration and buffering effect on the airflow. Through the above-mentioned air duct structure design and airflow buffering treatment of the main internal noise-generating nodes, the noise reduction performance of the canister vacuum cleaner is improved.

[0047] The connecting seat 3 includes a base 12, an air duct assembly 13, and an upper positioning seat 14, which are connected sequentially from bottom to top. The filter assembly 4 is assembled at the bottom of the base 12 and is sleeved on the bottom of the motor 5. It is combined with the air duct assembly 13 to form the spiral air duct structure. This makes the spiral air duct structure a detachable structure formed by assembling multiple parts, which can be easily disassembled, cleaned, and its parts replaced.

[0048] The air duct assembly 13 is provided with a spiral boss 15 on the outside of the motor 5, and a barrier 16 is also provided on its edge. The spiral air duct structure includes an inner spiral air duct 17 and an outer spiral air duct 18 that are joined only at the ends. The spiral surface of the spiral boss 15 is joined with the base 12 to form the inner spiral air duct 17. The inner spiral air duct 17 goes around the surface of the motor 5. The outer side of the spiral boss 15, the barrier 16 and the base 12 are joined to form the outer spiral air duct 18. The first end of the inner spiral air duct 17 is misaligned with the air inlet end of the outer spiral air duct 18, and its second end is joined with the air inlet end of the outer spiral air duct 18. The air outlet end of the outer spiral air duct 18 is joined with the air outlet cavity 19 that is connected to the first air outlet 8. The air duct assembly 13 and the extension plate of the upper positioning seat 14 are joined together to form a flow guide shroud 20. The air duct assembly 13 is provided with a flow passage notch 21. The portion of the outer spiral air duct 18, the flow passage notch 21, the inner cavity of the flow guide shroud 20, and the second air outlet 10 on the surface of the top cover 7 are sequentially connected. The airflow buffer assembly 11 is arranged inside the second air outlet 10. The second air outlet is provided to indirectly connect with the spiral air duct structure in a partial manner to connect the airflow and achieve the effect of flow diversion, thereby reducing the airflow velocity and thus achieving the effect of noise reduction.

[0049] The working principle of a canister vacuum cleaner with airflow buffering and noise reduction function in this embodiment includes: During use, the motor 5 operates, generating airflow inside the canister. This airflow carries dust and hair into the canister 1 through the air inlet 2. After being filtered by the filter assembly 4, the clean airflow enters the motor 5 and flows into the spiral duct structure through the motor outlet 6. The airflow enters the inner spiral duct 17 from multiple points on the surface of the motor 5, flows from the first end to the second end, and then enters the outer spiral duct 18. After being buffered and guided by the airflow buffer assembly 11, the airflow enters the outlet chamber 19 and finally exits the canister vacuum through the outlet mesh 9. During this process, some airflow exits the canister vacuum through the flow-through notch 21, the inner cavity of the guide hood 20, and the second outlet 10, achieving flow diversion. The canister vacuum achieves efficient airflow buffering and noise reduction functions through the combination of these multiple methods.

[0050] Example 2:

[0051] Please see Figure 2 , 3The figure shows a canister vacuum cleaner with airflow buffering and noise reduction function according to Embodiment 2 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: Several motor outlets 6 are spaced circumferentially along the surface of the motor 5, and airflow flows tangentially out from the motor outlets 6 along the surface of the motor 5. The cross-sectional area of ​​the inner spiral duct 17 gradually increases from the first end to the second end. The airflow is diverted by being tangentially directed through multiple points on the motor 5, while within the inner spiral duct 17, as the airflow converges, the gas volume at each node in the airflow direction increases, and the cross-sectional area increases synchronously, achieving a match between the change in gas volume and the expansion of the flow surface. This avoids localized sudden increases in gas volume that could cause airflow disturbance and impact, thereby generating significant noise.

[0052] The cross-sectional area of ​​the air outlet cavity 19 gradually increases along the airflow direction to reduce the airflow velocity at the air outlet on the suction surface of the barrel, thereby achieving the effect of noise reduction.

[0053] Example 3:

[0054] Please see Figure 2 , 3 The figure shows a canister vacuum cleaner with airflow buffering and noise reduction function according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: the inner spiral air duct 17 is located above the motor outlet 6. The airflow discharged from the motor is generally hot air that absorbs the heat generated during motor operation and has a natural upward tendency. By placing the inner spiral air duct 17 above the motor outlet 6, the airflow is continuously guided upwards. The natural flow trend of the hot airflow matches the airflow guidance direction of the inner spiral air duct 17, which reduces the energy consumption of the motor 5, reduces airflow disturbance, and thus achieves noise reduction.

[0055] Example 4:

[0056] Please see Figure 3 The figure shows a canister vacuum cleaner with airflow buffering and noise reduction function provided in Embodiment 4 of the present invention. Based on the above embodiments, the following technical solutions are further improved: the airflow buffer component 11 is provided at the corner of the outer spiral air duct 18. The airflow buffer component 11 is a sponge, so as to further improve the airflow buffering and noise reduction effect at each node of the spiral air duct structure.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A canister vacuum cleaner with airflow buffering and noise reduction function, characterized in that, include: The barrel body is equipped with an air inlet; A connecting seat is mounted on the barrel body, and a filter assembly is set at the bottom of the filter assembly. The top of the filter assembly is connected to a motor, which is located inside the connecting seat. The motor outlet on the filter assembly is connected to the spiral air duct structure inside the connecting seat. The top cover is assembled on the connecting seat, and the first air outlet on it is connected to the air outlet end of the spiral air duct structure. An air outlet mesh plate is assembled on the first air outlet. Airflow buffer components are provided inside the spiral air duct structure and on the air outlet mesh plate.

2. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 1, characterized in that, The connecting seat includes a base, an air duct assembly, and an upper positioning seat that are connected sequentially from bottom to top. The filter assembly is assembled at the bottom of the base and is sleeved on the bottom of the motor. It is combined with the air duct assembly to form the spiral air duct structure.

3. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 2, characterized in that, The air duct assembly has a spiral boss on the outside of the motor, and a barrier is also provided on its edge. The spiral air duct structure includes an inner spiral air duct and an outer spiral air duct that are joined only at the ends. The spiral surface of the spiral boss is joined with the base to form the inner spiral air duct. The inner spiral air duct goes around the surface of the motor once. The outer side of the spiral boss, the barrier, and the base are joined to form the outer spiral air duct. The first end of the inner spiral air duct is misaligned with the air inlet end of the outer spiral air duct. Its second end is joined with the air inlet end of the outer spiral air duct. The air outlet end of the outer spiral air duct is joined with the air outlet cavity that communicates with the first air outlet.

4. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 3, characterized in that, The cross-sectional area of ​​the internal spiral air duct gradually increases from the first end to the second end.

5. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 3, characterized in that, The inner spiral air duct is located above the air outlet of the motor.

6. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 3, characterized in that, The airflow buffer assembly is provided at the corner of the outer spiral air duct, and the airflow buffer assembly is a sponge.

7. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 3, characterized in that, The cross-sectional area of ​​the air outlet gradually increases along the airflow direction.

8. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 3, characterized in that, The air duct assembly and the extension plate of the upper positioning seat are joined together to form a flow guide shroud. The air duct assembly is provided with a flow passage notch. The part of the outer spiral air duct, the flow passage notch, the inner cavity of the flow guide shroud, and the second air outlet on the top cover surface are connected in sequence. The airflow buffer assembly is arranged on the inner side of the second air outlet.

9. A canister vacuum cleaner with airflow buffering and noise reduction function according to claim 1, characterized in that, The motor has several air outlets spaced circumferentially along the surface of the motor, and the airflow flows out tangentially from the motor air outlets along the surface of the motor.

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