Dust collection fan structure and cleaning base station

Abstract

The utility model relates to a dust collection fan structure and a cleaning base station. The dust collection fan structure comprises a shell part, a fan and a resonator. The shell part is provided with a containing cavity and an air duct, the containing cavity is provided with an inlet and an outlet which are communicated with each other, the air duct is communicated with the outlet, and noise reduction holes are formed in the inner wall of the air duct; the fan is contained in the containing cavity and used for leading airflow into the containing cavity from the inlet and leading the airflow out of the air outlet of the air duct. The resonator is connected to the shell part, and a sound inlet in the resonator is communicated with the noise reduction hole so as to reduce noise. The resonator is arranged, the sound inlet in the resonator communicates with the noise reduction hole, and the sound inlet communicates with the air channel, so that noise, matched with the inherent frequency of the resonator, in the air channel can be eliminated or weakened, the noise is reduced, and the user experience feeling is improved.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to the structure of dust collection fans and cleaning base stations. Background Technology

[0002] Robotic vacuum cleaners have become an essential tool for modern home cleaning, with dust collection being one of their core functions. After completing the sweeping task or when the dustbin is full, the robot vacuum enters its base station to collect dust. A dust collection fan creates negative pressure to suck debris from the dustbin into a larger dust bag. However, due to the high power and strong suction of the dust collection fan, the noise level is correspondingly high, significantly impacting the user experience. Utility Model Content

[0003] Therefore, it is necessary to provide a dust collection fan structure to address the technical problem that dust collection fans with high power and strong suction also generate correspondingly large noise, which seriously affects the user experience.

[0004] A dust collection fan structure includes:

[0005] The housing component has a receiving cavity and an air duct. The receiving cavity has an inlet and an outlet that are interconnected. The air duct is connected to the outlet, and the inner wall of the air duct has noise reduction holes.

[0006] A fan, housed in the receiving cavity, the fan being used to introduce airflow into the receiving cavity from the inlet and out through the outlet of the air duct; and,

[0007] A resonator is connected to the housing component, and the sound inlet on the resonator is connected to the noise reduction hole for noise reduction.

[0008] In the above-mentioned dust collection fan structure, the fan rotates to introduce airflow into the receiving cavity through the inlet and out through the air outlet of the air duct, thereby generating negative pressure to suck the garbage from the dust box into a larger capacity dust bag. In addition, by setting a resonator and connecting the sound inlet on the resonator with the noise reduction hole, the sound inlet is connected to the air duct, thereby eliminating or reducing the noise in the air duct that matches the natural frequency of the resonator, thereby reducing noise and improving the user experience.

[0009] In some embodiments, the resonator has a resonant cavity and a neck cavity that are in communication with each other, and the sound inlet is located on the side of the neck cavity away from the resonant cavity.

[0010] In some embodiments, the dust collection fan structure further includes a first noise reduction component, which is housed in the air duct and connected to the inner wall of the air duct, and at least a portion of the first noise reduction component is located on the side opposite to the outlet of the receiving cavity, and the first noise reduction component is used to absorb noise.

[0011] In some embodiments, the first noise reduction component includes a first noise reduction section and a second noise reduction section connected to each other, the first noise reduction section being located on the side opposite to the outlet, and the second noise reduction section being located on the side away from the air outlet.

[0012] In some embodiments, the first noise reduction component includes a first noise reduction cotton, which is connected to the inner wall of the air duct.

[0013] In some embodiments, the first noise reduction component further includes a mating plate, which is connected to the side of the first noise reduction cotton away from the inner wall of the air duct, and the mating plate has a plurality of spaced sound-absorbing holes.

[0014] In some embodiments, the diameter of the sound-absorbing hole is 1mm-4mm; and / or, the axial dimension of the sound-absorbing hole is 5mm-14mm.

[0015] In some embodiments, the dust collection fan structure further includes a first partition plate, which is connected to the housing component and disposed between the receiving cavity and the air duct. The first partition plate has a plurality of spaced-apart first through holes, which are configured as outlets.

[0016] In some embodiments, the diameter of the first through hole is 1mm-6mm; and / or, the axial dimension of the first through hole is 2mm-12mm.

[0017] In some embodiments, the dust collection fan structure further includes a second partition, which is housed within the air duct and connected to the inner wall of the air duct to divide the air duct into two segments. The second partition has a plurality of spaced second through holes, and the two segments are connected through the second through holes.

[0018] In some embodiments, the dust collection fan structure further includes a third partition plate, which is connected to the housing component and is disposed at the end of the air duct away from the outlet. The third partition plate has a plurality of spaced third through holes, which are configured as the air outlet.

[0019] In some embodiments, the dust collection fan structure further includes a second noise reduction cotton, which is housed in the air duct and connected to the side of the third partition near the fan.

[0020] This utility model also provides a clean base station that can solve at least one of the above-mentioned technical problems.

[0021] A clean base station includes the aforementioned dust collection fan structure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the dust collection fan structure in some embodiments of the present invention;

[0023] Figure 2 This is a cross-sectional schematic diagram of the dust collection fan structure in some embodiments of the present invention. Figure 1 ;

[0024] Figure 3 This is a cross-sectional schematic diagram of the dust collection fan structure in some embodiments of the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the resonator structure in the dust collection fan structure in some embodiments of this utility model;

[0026] Figure 5 This is a cross-sectional schematic diagram of the resonator in the dust collection fan structure in some embodiments of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the mating plate in the dust collection fan structure in some embodiments of this utility model.

[0028] Icon labels:

[0029] 100. Housing component; 110. Receiving cavity; 111. Inlet; 112. Outlet; 113. First housing; 114. Second housing; 115. Housing; 120. Air duct; 121. Noise reduction hole; 122. Air outlet; 123. First section; 124. Second section; 200. Fan; 300. Resonator; 310. Resonance cavity; 320. Neck cavity; 340. Sound inlet; 350. Panel; 351. Cabinet; 352. Cover plate; 353. 1. Locking buckle; 360. Neck tube; 400. First noise reduction component; 410. First noise reduction section; 420. Second noise reduction section; 430. First noise reduction cotton; 440. Matching plate; 441. Sound absorption hole; 442. First plate section; 443. Second plate section; 444. Transition plate section; 510. First partition; 511. First through hole; 520. Second partition; 521. Second through hole; 530. Third partition; 531. Third through hole; 540. Second noise reduction cotton. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the dust collection fan structure in some embodiments of the present invention; Figure 2 This is a cross-sectional schematic diagram of the dust collection fan structure in some embodiments of the present invention. Figure 1 ; Figure 3 This is a cross-sectional schematic diagram of the dust collection fan structure in some embodiments of the present invention. Figure 2 An embodiment of this utility model provides a dust collection fan structure, including a housing 100, a fan 200, and a resonator 300. The housing 100 has a receiving cavity 110 and an air duct 120. The receiving cavity 110 has an inlet 111 and an outlet 112 that are interconnected. The air duct 120 is connected to the outlet 112, and the inner wall of the air duct 120 has a noise reduction hole 121. The fan 200 is housed in the receiving cavity 110 and is used to introduce airflow into the receiving cavity 110 from the inlet 111 and outflow it through the outlet 122 of the air duct 120. The resonator 300 is connected to the housing 100, and the sound inlet 340 on the resonator 300 is connected to the noise reduction hole 121 for noise reduction.

[0037] Specifically, in this application, the receiving cavity 110 and the air duct 120 are connected. The fan 200 is housed in the receiving cavity 110. When the fan 200 rotates, it can introduce airflow into the receiving cavity 110 through the inlet 111 and out through the outlet 122 of the air duct 120, thereby generating negative pressure to suck garbage from the dust box into a larger capacity dust bag. Furthermore, by setting a resonator 300 and connecting the sound inlet 340 on the resonator 300 to the noise reduction hole 121, and connecting the sound inlet 340 to the air duct 120, noise within the air duct 120 that matches the natural frequency of the resonator 300 can be eliminated or reduced, thereby reducing noise and improving the user experience.

[0038] Furthermore, the housing component 100 includes a first housing 113, a second housing 114, and a housing 115. The second housing 114 is connected to the first housing 113 to form an air duct 120. The housing 115 is connected to the second housing 114, and a receiving cavity 110 is formed inside the housing 115.

[0039] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the resonator 300 has a resonant cavity 310 and a neck cavity 320 that are in communication with each other, and the sound inlet 340 is located on the side of the neck cavity 320 away from the resonant cavity 310.

[0040] Specifically, the neck cavity 320 contains an air column of a certain mass. The airflow into the air duct 120 passes through the noise reduction hole 121. When the sound wave passes through the sound inlet 340, it acts on the air column in the neck cavity 320. Under the action of the sound wave, the air column moves back and forth like a piston. Due to the inertia of its mass, the air column resists changes in its speed. The resonant cavity 310 of a certain volume can be inflated and deflated like an air spring. The friction and damping during the vibration of the air column convert some of the sound energy into heat energy, thereby achieving noise reduction. In this embodiment, the resonator 300 is a Helmholtz resonator.

[0041] When the frequency of the external sound wave is the same as the natural frequency of the resonant cavity 310, the system resonates. The natural frequency of the resonant cavity 310 can be expressed by the formula... Calculations show that S is the cross-sectional area of ​​the neck cavity 320, and V is the volume of the resonant cavity 310. The length of the neck cavity 320 is given by C, where C is the speed of sound. It can be seen that the resonant frequency is directly proportional to the cross-sectional area of ​​the neck cavity 320 and inversely proportional to the length of the neck cavity 320 and the volume of the resonant cavity 310. By adjusting the cross-sectional area, length, or volume of the neck cavity 320 or the resonant cavity 310, the natural frequency of the resonator 300 can be adjusted. When the natural frequency of the resonator 300 matches the noise frequency of the airflow within the duct 120, noise close to this frequency can be eliminated or reduced, thus achieving noise reduction.

[0042] Furthermore, in the axial direction of the neck cavity 320, the inner contour dimension of the resonant cavity 310 is larger than that of the neck cavity 320. This reduces the height of the resonator 300 while keeping the volume of the resonant cavity 310 unchanged, thereby reducing the size of the dust collection fan structure for miniaturization.

[0043] See Figure 3 , Figure 4 and Figure 5 , Figure 3 This is a cross-sectional schematic diagram of the dust collection fan structure in some embodiments of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the resonator structure in the dust collection fan structure in some embodiments of this utility model; Figure 5This is a cross-sectional schematic diagram of the resonator in the dust collection fan structure in some embodiments of the present invention. In some embodiments, the resonator 300 includes a plate 350 and a neck tube 360 ​​connected to the plate 350. A neck cavity 320 is disposed within the neck tube 360, and a resonant cavity 310 is disposed within the plate 350. In the axial direction of the neck cavity 320, the outer contour dimension of the neck tube 360 ​​is smaller than the outer contour dimension of the plate 350, thereby reducing the weight of the resonator 300 and achieving a lightweight dust collection fan structure.

[0044] Furthermore, the plate 350 includes a housing 351, a cover plate 352, and a latch 353. One side of the cover plate 352 is connected to the neck tube 360, and the other side of the cover plate 352 is connected to the housing 351 via the latch 353, thereby forming a resonant cavity 310. By replacing different housings 351, the volume of the resonant cavity 310 can be changed to accommodate different resonant frequencies. In this application, multiple resonators 300 can be provided, allowing simultaneous resonance with multiple noise frequencies to achieve the purpose of simultaneously absorbing multiple noises.

[0045] See Figure 2 In some embodiments, the dust collection fan structure further includes a first noise reduction component 400, which is housed in the air duct 120 and connected to the inner wall of the air duct 120. At least a portion of the first noise reduction component 400 is located on the side opposite to the outlet 112 of the receiving cavity 110. The first noise reduction component 400 is used to absorb noise.

[0046] Specifically, at least a portion of the outlet 112 is disposed opposite to the first noise reduction component 400, so that the airflow flowing out through the outlet 112 will impact the first noise reduction component 400, thereby facilitating the first noise reduction component 400 to absorb noise and reduce the noise of the airflow in the duct 120.

[0047] Furthermore, in the axial direction of the air duct 120, the receiving cavity 110 is offset from the air duct 120, that is, the housing 115 is located on the side of the air duct 120 and protrudes from the side opposite to the first housing 113 relative to the second housing 114, so as to accommodate the fan 200. Among them, the noise reduction hole 121 is located on the second housing 114, the resonator 300 is connected to the second housing 114, and the protrusion direction of the resonator 300 relative to the second housing 114 is the same as the protrusion direction of the housing 115 relative to the second housing 114, thereby reducing the size of the dust collection fan structure.

[0048] See Figure 2 and Figure 3 In some embodiments, the first noise reduction element 400 includes a first noise reduction section 410 and a second noise reduction section 420 420 connected to each other. The first noise reduction section 410 is located on the side opposite to the outlet 112, and the second noise reduction section 420 420 is located on the side away from the air outlet 122.

[0049] Specifically, the first noise reduction section 410 extends axially along the air duct 120, and the extension direction of the second section forms an angle with the extension direction of the first noise reduction section 410, and is located on the side away from the air outlet 122. The airflow flowing out through the outlet 112 will collide with the first noise reduction section 410 and the second noise reduction section 420, and the airflow after the collision will flow towards the air outlet 122. By configuring the first noise reduction section 410 and the second noise reduction section 420 to collide with the airflow, the degree of noise absorption by the first noise reduction component 400 is increased, thereby improving the noise reduction effect.

[0050] Furthermore, the end of the second noise reduction section 420420 that is away from the first noise reduction section 410 is connected to the housing 115, so that most of the airflow flowing out through the outlet 112 collides with the first noise reduction section 410 and the second noise reduction section 420420, thereby improving the noise reduction effect.

[0051] See Figure 2 and Figure 3 In some embodiments, the first noise reduction component 400 includes a first noise reduction cotton 430, which is connected to the inner wall of the air duct 120 to absorb and attenuate noise.

[0052] See Figure 2 and Figure 3 In some embodiments, the first noise reduction component 400 further includes a mating plate 440, which is connected to the side of the first noise reduction cotton 430 away from the inner wall of the air duct 120, and the mating plate 440 has a plurality of spaced sound-absorbing holes 441.

[0053] Specifically, the mating plate 440 can fix the first noise-reducing cotton 430, and absorb sound waves through the multiple spaced sound-absorbing holes 441 on the mating plate 440, converting sound energy into heat energy, thereby reducing the reflected and propagated sound wave energy and improving the noise reduction effect.

[0054] See Figure 2 and Figure 3 In some embodiments, the aperture of the sound-absorbing hole 441 is 1mm-4mm, and the axial dimension of the sound-absorbing hole 441 is 5mm-14mm. By reasonably setting the aperture and axial dimension of the sound-absorbing hole 441, the sound-absorbing hole 441 has a stronger ability to absorb sound waves, thereby reducing the reflected and propagated sound wave energy and improving the noise reduction effect.

[0055] See Figure 2 , Figure 3 and Figure 6 , Figure 6This is a schematic diagram of the structure of the mating plate in the dust collection fan structure in some embodiments of the present invention. In some embodiments, the mating plate 440 includes a first plate segment 442, a second plate segment 443, and a transition plate segment 444. The transition plate segment 444 corresponds to the first noise reduction segment 410, and the second plate segment 443 corresponds to the second noise reduction segment 420. The two ends of the transition plate segment 444 are connected to the first plate segment 442 and the second plate segment 443, respectively. The transition plate segment 444 is arc-shaped to guide the airflow toward the air outlet 122.

[0056] See Figure 2 and Figure 3 In some embodiments, the dust collection fan structure further includes a first partition 510, which is connected to the housing 100 and disposed between the receiving cavity 110 and the air duct 120. The first partition 510 has a plurality of spaced first through holes 511, which are configured as outlets 112.

[0057] Specifically, when the airflow generated by the fan 200 flows into the air duct 120 through a plurality of spaced first through holes 511 on the first partition 510, it can reduce the turbulence and eddies in the airflow within the air duct, thereby reducing airflow noise. Preferably, the first through holes 511 on the first partition 510 are evenly spaced.

[0058] Furthermore, the diameter of the first through hole 511 is 1mm-6mm, and the axial dimension of the first through hole 511 is 2mm-12mm. It should be noted that if the diameter of the first through hole 511 is too small or the spacing is too large, it will affect the ventilation effect. If the diameter of the first through hole 511 is too large or the spacing is too small, the effect of evenly distributing the airflow in the air duct 120 will not be good. Therefore, it is necessary to select appropriate dimensions.

[0059] See Figure 2 and Figure 3 In some embodiments, the dust collection fan structure further includes a second partition 520, which is housed within the air duct 120 and connected to the inner wall of the air duct 120 to divide the air duct 120 into two segments. The second partition 520 has a plurality of spaced second through holes 521, and the two segments are connected through the second through holes 521.

[0060] Specifically, for ease of description, the perforation section is divided into a first perforation section 123 and a second perforation section 124. The first perforation section 123 is connected to the outlet 112, and the air outlet 122 is located on the second perforation section 124. When the airflow in the first perforation section 123 flows into the second perforation section 124 through a plurality of spaced second through holes 521 on the second partition 520, it can reduce the turbulence and eddies in the airflow within the second perforation section 124, thereby reducing airflow noise. The second through holes 521 are the same size as the first through holes 511. Preferably, the second through holes 521 on the second partition 520 are evenly spaced.

[0061] Furthermore, the first orifice segment 123 and the second orifice segment 124 extend in the same direction. The first noise reduction segment 410 and the second noise reduction segment 420 420 are disposed on the inner wall of the first orifice segment 123, and the second noise reduction segment 420 420 is disposed opposite to the air outlet 122. The number of second baffles 520 can be one or more. When there are two or more second baffles 520, each second baffle 520 is spaced apart along the axial direction of the air duct 120. It should be noted that the first noise reduction component 400 can also be disposed in other areas of the inner wall of the air duct 120.

[0062] Furthermore, the noise reduction hole 121 is disposed in the second hole section 124. Since the second hole section 124 is close to the air outlet 122, the noise within the second hole section 124 that matches the natural frequency of the resonator 300 is eliminated or reduced by the resonator 300, thereby reducing the noise of the airflow flowing out of the air outlet 122 and improving the noise reduction effect. In other embodiments, the resonator 300 can also be disposed in the first hole section 123.

[0063] See Figure 2 and Figure 3 In some embodiments, the dust collection fan structure further includes a third partition 530, which is connected to the housing 100 and is located at the end of the air duct 120 away from the outlet 112. The third partition 530 has a plurality of spaced third through holes 531, which are configured as air outlets 122.

[0064] Specifically, when the airflow within the second orifice 124 flows out through the multiple spaced third through holes 531 on the third partition 530, turbulence and eddies in the outflowing airflow are reduced, thereby lowering airflow noise. The third through holes 531 are the same size as the first through holes 511. Preferably, the second through holes 521 on the third partition 530 are evenly spaced.

[0065] See Figure 2 and Figure 3In some embodiments, the dust collection fan structure further includes a second noise reduction cotton 540, which is housed in the air duct 120 and connected to the side of the third partition 530 near the fan 200.

[0066] Specifically, the airflow flowing out through the second hole 124 will collide with the third partition 530 when it flows out through the third through hole 531, generating noise. The second noise reduction cotton 540 can absorb some of the noise and prevent the airflow from directly colliding with the third partition 530, thereby improving the noise reduction effect.

[0067] This utility model embodiment also provides a cleaning base station, including the dust collection fan structure described above. By setting a resonator 300 and connecting the sound inlet 340 on the resonator 300 to the noise reduction hole 121, and connecting the sound inlet 340 to the air duct 120, vibration reduction and noise reduction of the airflow within the air duct 120 can be achieved, thereby reducing noise and improving the user experience. In other words, the cleaning base station of this application embodiment, because it adopts the dust collection fan structure described above, has the same technical effects as the dust collection fan structure described above, and will not be described in detail here.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dust collection fan structure, characterized in that, The dust collection fan structure includes: The housing component has a receiving cavity and an air duct. The receiving cavity has an inlet and an outlet that are interconnected. The air duct is connected to the outlet, and the inner wall of the air duct has noise reduction holes. A fan, housed in the receiving cavity, the fan being used to introduce airflow into the receiving cavity from the inlet and out through the outlet of the air duct; and, A resonator is connected to the housing component, and the sound inlet on the resonator is connected to the noise reduction hole for noise reduction.

2. The dust collection fan structure according to claim 1, characterized in that, The resonator has a resonant cavity and a neck cavity that are interconnected, and the sound inlet is located on the side of the neck cavity away from the resonant cavity.

3. The dust collection fan structure according to claim 1, characterized in that, The dust collection fan structure further includes a first noise reduction component, which is housed in the air duct and connected to the inner wall of the air duct. At least a portion of the first noise reduction component is located on the side opposite to the outlet of the receiving cavity. The first noise reduction component is used to absorb noise.

4. The dust collection fan structure according to claim 3, characterized in that, The first noise reduction component includes a first noise reduction section and a second noise reduction section connected to each other. The first noise reduction section is located on the side opposite to the outlet, and the second noise reduction section is located on the side away from the air outlet.

5. The dust collection fan structure according to claim 3, characterized in that, The first noise reduction component includes a first noise reduction cotton, which is connected to the inner wall of the air duct.

6. The dust collection fan structure according to claim 5, characterized in that, The first noise reduction component also includes a mating plate, which is connected to the side of the inner wall of the first noise reduction cotton away from the air duct, and the mating plate has a plurality of spaced sound-absorbing holes.

7. The dust collection fan structure according to claim 6, characterized in that, The diameter of the sound-absorbing hole is 1mm-4mm; and / or, the axial dimension of the sound-absorbing hole is 5mm-14mm.

8. The dust collection fan structure according to any one of claims 1-7, characterized in that, The dust collection fan structure also includes a first partition plate, which is connected to the housing component and disposed between the receiving cavity and the air duct. The first partition plate has a plurality of spaced first through holes, which are configured as outlets.

9. The dust collection fan structure according to claim 8, characterized in that, The diameter of the first through hole is 1mm-6mm; and / or the axial dimension of the first through hole is 2mm-12mm.

10. The dust collection fan structure according to any one of claims 1-7, characterized in that, The dust collection fan structure also includes a second partition plate, which is housed in the air duct and connected to the inner wall of the air duct to divide the air duct into two segments. The second partition plate has a plurality of spaced second through holes, and the two segments are connected through the second through holes.

11. The dust collection fan structure according to any one of claims 1-7, characterized in that, The dust collection fan structure also includes a third partition plate, which is connected to the housing component and is located at the end of the air duct away from the outlet. The third partition plate has a plurality of spaced third through holes, which are configured as the air outlet.

12. The dust collection fan structure according to claim 11, characterized in that, The dust collection fan structure also includes a second noise reduction cotton, which is housed in the air duct and connected to the side of the third partition near the fan.

13. A clean base station, characterized in that, Includes the dust collection fan structure as described in any one of claims 1-12.

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