CN220655481U - Noise reduction device and dust collector - Google Patents

Abstract

The application discloses noise reduction device and dust catcher belongs to noise reduction equipment's technical field to solve the poor technical problem of noise reduction effect of current dust catcher. The noise reduction device comprises a noise reduction part, a noise reduction channel is arranged in the noise reduction part, the noise reduction part is provided with a preset base point, the noise reduction channel is arranged around the preset base point, and a noise reduction opening communicated with the noise reduction channel is further formed in the noise reduction part. The noise sound wave can circulate along the sound-deadening channel while flowing in the sound-deadening channel, so that the noise sound wave can be sufficiently consumed in the sound-deadening channel. In addition, the ring-shaped sound-damping channel can also enable the volume of the noise part occupied by the sound-damping channel to be smaller under the condition of longer length, so that the structure of the noise part can be more compact.

Description

Noise reduction device and dust collector

Technical Field

The application belongs to the technical field of noise reduction equipment, and particularly relates to a noise reduction device and a dust collector.

Background

In the operation process of the dust collector, the dust collector can generate huge noise under the influence of the rotation of the internal fan and the air flow generated by the fan, thereby influencing the user experience.

In the related art, the thickness of the noise reduction portion of the dust collector can be increased to reduce noise, so that noise can be blocked in the noise reduction portion as much as possible, but the structure of the dust collector is complicated and the cost is increased, and meanwhile, the noise cannot be sufficiently blocked by the wide noise reduction portion.

Disclosure of Invention

The application aims to solve the technical problem that the noise reduction effect of the existing dust collector is poor to a certain extent at least. For this reason, the application provides a noise reduction device and dust catcher.

In a first aspect, an embodiment of the present application provides a noise reduction device, including:

the noise reduction part is internally provided with a noise reduction channel, the noise reduction part is provided with a preset base point, the noise reduction channel is arranged around the preset base point, and the noise reduction part is further provided with a noise reduction opening communicated with the noise reduction channel.

In some embodiments, the muffler port is oriented to intersect the axial direction of the muffler channel.

In some embodiments, the number of the silencing channels and the silencing ports is plural, and the silencing ports are respectively communicated with the silencing channels.

In some embodiments, a plurality of the silencing channels are sleeved in sequence, and the silencing channels are communicated in sequence.

In some embodiments, a plurality of said sound attenuation channels are arranged concentrically.

In some embodiments, the noise reduction part comprises a plurality of noise reduction rings sleeved at intervals in sequence, gaps between adjacent noise reduction rings form the noise reduction channel, and the noise reduction opening is arranged on the outer wall of the noise reduction ring.

In some embodiments, the noise reduction portion is further provided with a central noise reduction cavity, and the central noise reduction cavity is surrounded and communicated by the noise reduction channel located at the innermost side of the noise reduction portion.

In some embodiments, the noise reduction portion has a transition guide surface that can guide the airflow through the noise reduction portion.

In some embodiments, the cross section of the sound attenuation channel in the axial direction of the sound attenuation portion is annular, and the cross section of the central sound attenuation cavity in the axial direction of the sound attenuation portion is circular.

In some embodiments, the noise reduction device further comprises a housing having an air passage therein, the noise reduction portion being disposed in the air passage.

In some embodiments, the noise reduction portion is connected to an inner wall of the airway.

In a second aspect, based on the above noise reduction device, an embodiment of the present application further provides a dust collector, including the above noise reduction device.

In some embodiments, the vacuum cleaner further comprises a main body having an air duct, the noise reduction portion being disposed within the air duct.

In the noise reduction device provided by the embodiment of the application, the noise reduction part can be arranged in the air duct where the airflow generating noise flows, when the noise sound wave of the airflow flows along with the airflow in the air duct, the noise sound wave can enter the noise reduction channel of the noise reduction part through the noise reduction opening of the noise reduction part, the energy of the noise sound wave can be naturally consumed when the noise sound wave flows in the noise reduction channel of the noise reduction part, and the noise sound wave can be consumed under the action of resonance effect when the noise sound wave contacts with the inner wall of the noise reduction channel. The sound-deadening passageway is disposed around a predetermined base point of the sound-deadening portion such that the sound-deadening passageway can circulate therein when the sound-deadening sound wave flows therein, so that the sound-deadening sound wave can be sufficiently consumed in the sound-deadening passageway. In addition, the ring-shaped sound-damping channel can also enable the volume of the noise part occupied by the sound-damping channel to be smaller under the condition of longer length, so that the structure of the noise part can be more compact.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a noise reduction device disclosed in an embodiment of the present application;

fig. 2 is a schematic structural view showing a noise reduction portion of the noise reduction device disclosed in the embodiment of the present application;

FIG. 3 illustrates a schematic top view of a noise reduction portion of a noise reduction device disclosed in an embodiment of the present application;

fig. 4 shows a schematic top view of a noise reduction ring of a noise reduction device disclosed in an embodiment of the present application.

Reference numerals:

100 parts of noise reduction, 110 parts of noise elimination channels, 120 parts of preset base points, 130 parts of noise elimination ports, 140 parts of noise reduction rings, 141 parts of transition guide surfaces, 150 parts of central noise elimination cavities,

200-housing, 210-airway.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all the directional indicators in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

example 1

Referring to fig. 1 to 4, an embodiment of the present application discloses a noise reduction device, which includes a noise reduction portion 100. The noise reduction device can be applied to equipment for noise generated by air flow, particularly can be applied to a heat dissipation mechanism of nuclear magnetic resonance equipment, or can be applied to equipment such as a dust collector, and the like, and is not limited by the application.

It will be appreciated that during operation of the cleaner, the rotation of the blower within the cleaner creates a strong air flow to create a negative pressure environment within the cleaner so that external dirt and dust can be drawn into the cleaner. In this process, the airflow flowing in the cleaner can generate a large amount of noise. The nuclear magnetic resonance equipment generates a large amount of heat when the gradient coil is electrified in the operation process, if the heat is accumulated in the nuclear magnetic resonance equipment, the nuclear magnetic resonance equipment cannot work due to overheating, so that a cooling fan is required to be arranged in the nuclear magnetic resonance equipment to discharge the heat in the nuclear magnetic resonance equipment out of the nuclear magnetic resonance equipment, and huge noise is generated when airflow formed in the rotation process of the cooling fan flows in a cooling channel of the nuclear magnetic resonance equipment. Therefore, in order to solve the above-mentioned problems, the noise reduction device of the present application may be applied to a vacuum cleaner or a nuclear magnetic resonance apparatus to reduce noise generated by air flow during operation.

The noise reduction part 100 is a base member of the noise reduction device of the present application, the noise reduction part 100 may provide an installation base for other at least partial components of the noise reduction device of the present application, and the noise reduction part 100 may be disposed in an air duct of a dust collector or in a heat dissipation channel of a nuclear magnetic resonance apparatus. The noise reduction part 100 is provided with a noise reduction channel 110, the noise reduction part 100 is also provided with a noise reduction opening 130 communicated with the noise reduction channel 110, and it is understood that noise sound waves can be generated by collision of air flows in the dust collector and collision of the air flows with the inner wall of the dust collector in the flowing process, and the noise sound waves can be diffused in the dust collector and conducted to the outside of the dust collector through an air inlet and outlet and a shell of the dust collector. Therefore, when the noise reduction part 100 of the present application is disposed in the air duct of the dust collector, the noise reduction channel 110 of the noise reduction part 100 is communicated with the air duct of the dust collector through the noise reduction opening 130, and noise sound waves generated by air flow can enter the noise reduction channel 110 through the noise reduction opening 130 of the noise reduction part 100, and in the process of flowing in the noise reduction channel 110 of the noise reduction part 100, the energy of the noise sound waves can be consumed in the noise reduction channel 110.

Specifically, after the sound wave of the airflow noise enters the sound damping channel 110 of the noise reduction part 100, the sound wave naturally attenuates during the flow of the sound damping channel 110 of the noise reduction part 100, so that the energy of the sound wave is reduced. In addition, the resonance effect can be generated after the sound wave contacts with the inner wall of the silencing channel 110, the energy of the sound wave can be attenuated gradually, so that the noise is reduced, and meanwhile, in the process that the air flow passes through the air duct, at least part of the sound wave of the noise can be consumed due to the contact and collision between the sound wave of the noise and the inner wall of the air duct, so that the noise wave of the air flow can be fully consumed.

The noise reduction part 100 is only provided with the noise reduction port 130 and is communicated with the noise reduction channel 110, so that the noise reduction channel 110 of the noise reduction part 100 is not a complete channel and is in a non-convection state, and correspondingly, the noise reduction channel 110 is only communicated with the air channel through the noise reduction port 130, so that even if air flow in the air channel enters the noise reduction channel 110 through the noise reduction port 130 of the noise reduction part 100, the air flow cannot fully circulate in the noise reduction channel 110 of the noise reduction part 100, and thus the air flow in the air channel can only be discharged through the air outlet of the air channel, the air flow loss can be avoided, the air flow output by the dust collector can not be discharged through the noise reduction cavity, the loss of the air flow in the process of passing through the air channel is relatively small, and the noise of at least part of the air flow can be eliminated.

The noise reduction part 100 of the present application has a preset base point 120, and the noise reduction channel 110 of the noise reduction part 100 is disposed around the preset base point 120, so the noise reduction channel 110 of the noise reduction part 100 may be in a ring structure, and the space occupied by the noise reduction channel 110 of the ring structure may be relatively smaller under the condition of having a relatively longer channel length, so the path of the noise reduction channel 110 disposed in the noise reduction part 100 may be relatively longer under the condition that the volume of the noise reduction part 100 is fixed, so the distance that the noise sound wave of the air flow may flow in the noise reduction channel 110 of the noise reduction part 100 may be longer, and accordingly, the noise sound wave may be sufficiently consumed in the noise reduction channel 110 of the noise reduction part 100. Further, it should be further understood that, since the sound-deadening channel 110 of the noise-deadening portion 100 has a ring-shaped structure, the flow direction of the noise sound wave may be changed along with the extending direction of the sound-deadening channel 110 of the noise-deadening portion 100 during the flow of the noise sound wave in the sound-deadening channel 110 of the noise-deadening portion 100, so that the noise sound wave may continuously collide with the inner wall of the sound-deadening channel 110 to be more sufficiently consumed in the sound-deadening channel 110 of the noise-deadening portion 100.

It should be noted that the length of the sound damping channel 110 of the noise reduction part 100 and the angle of the relative bending of the parts of the sound damping channel 110 may be set according to the frequency of the noise sound wave, and in particular, when the frequency of the noise sound wave is low, the extension length of the noise reduction part 100 may be made longer by reducing the angle of the relative bending of the parts of the sound damping channel 110 of the noise reduction part 100, so that the distance and range in which the noise sound wave may flow within the sound damping channel 110 of the noise reduction part 100 may be greater, so that the low frequency noise sound wave may be sufficiently eliminated. And when the frequency of the noise sound wave is high, the extension length of the noise reduction part 100 can be made relatively shorter by increasing the angle at which the parts of the noise reduction channel 110 of the noise reduction part 100 are bent with respect to each other, so that the high-frequency noise sound wave can be sufficiently eliminated.

In the noise reduction device provided by the embodiment of the present application, the noise reduction portion 100 may be disposed in an air duct through which an air flow generating noise flows, when noise sound waves of the air flow along with the air flow in the air duct, the noise sound waves may enter into the noise reduction channel 110 of the noise reduction portion 100 through the noise reduction opening 130 of the noise reduction portion 100, energy of the noise sound waves may be naturally consumed when the noise sound waves flow in the noise reduction channel 110 of the noise reduction portion 100, and when the noise sound waves contact with an inner wall of the noise reduction channel 110, the noise sound waves may be consumed under the action of a resonance effect. The sound damping channel 110 is disposed around the preset base point 120 of the sound damping portion 100 such that the sound damping channel 110 has a ring-shaped structure, so that the noise sound wave can circulate along the sound damping channel 110 when flowing in the sound damping channel 110, so that the noise sound wave can be sufficiently consumed in the sound damping channel 110. In addition, the ring-shaped sound-deadening passage 110 can also make the volume of the sound-deadening passage 110 occupied by the longer length smaller, so that the structure of the sound-deadening portion can be more compact.

In some embodiments, in order to make the noise sound wave of the air flow enter into the sound damping channel 110 through the sound damping port 130 of the noise reduction part 100, the noise sound wave may flow along the sound damping channel 110 more smoothly, so that the noise sound wave may be more sufficiently consumed. The direction of the sound-damping mouth 130 of the noise-damping portion 100 may be set to axially intersect the sound-damping channel 110, that is, the sound-damping mouth 130 of the noise-damping portion 100 faces the inner wall of the sound-damping channel 110 that is curved, so that after entering the sound-damping channel 110 of the noise-damping portion 100 through the sound-damping mouth 130 of the noise-damping portion 100, the noise waves may flow and diffuse along the extending direction of the sound-damping channel 110 under the guidance of the curved inner wall of the sound-damping channel 110, and further, the noise waves may flow in the sound-damping channel 110 of the noise-damping portion 100 more efficiently to be consumed. Specifically, the muffler opening 130 of the noise reduction part 100 may be oriented in the same radial direction as the muffler channel 110.

In some embodiments, in order to make the noise reduction device of the present application have a better effect of eliminating noise, and have a higher efficiency of eliminating noise, the number of the noise reduction channels 110 and the number of the noise reduction openings 130 in the noise reduction portion 100 may be multiple, and the plurality of the noise reduction openings 130 may be respectively disposed corresponding to the plurality of the noise reduction channels 110, so that each noise reduction channel 110 is communicated with at least one noise reduction opening 130, and noise waves of air flow passing through the air duct may enter into each noise reduction channel 110 through the plurality of the noise reduction openings 130 of the noise reduction portion 100, so that the noise waves of air flow may flow in the plurality of the noise reduction channels 110 of the noise reduction portion 100, so that the noise waves may be sufficiently eliminated. The plurality of sound attenuation openings 130 may be disposed at intervals along the circumference of the noise attenuation portion 100, and of course, the sound attenuation openings 130 may also be disposed to extend along the circumference of the noise attenuation portion 100 to form a stripe hole structure.

Specifically, the sound damping ports 130 of the noise damping portion 100 may be provided at each portion of the surface of the noise damping portion 100, so that the noise sound wave of the air flow passing through the air duct may enter into each of the sound damping passages 110 through each of the sound damping ports 130, and the noise sound wave is divided into a plurality of sound waves, which are sufficiently cancelled in each of the sound damping passages 110. The plurality of sound damping ports 130 of the noise damping portion 100 may be disposed at intervals along the extending direction of the air duct, so that the noise sound waves of the air flow in the air duct may sequentially pass through the plurality of sound damping ports 130 of the noise damping portion 100 and enter the plurality of sound damping channels 110 during the flowing process. The lengths of the plurality of noise elimination channels 110 of the noise elimination portion 100 and the bending angles of the portions of the noise elimination channels 110 may be set to be different, for example, the structural size of the portion of the noise elimination channel 110 corresponds to a noise wave with a low frequency, the structural size of the portion of the noise elimination channel 110 corresponds to a noise wave with a medium frequency, and the structural size of the portion of the noise elimination channel 110 corresponds to a noise wave with a high frequency, so that the noise elimination device of the present application has an excellent elimination effect on the noise wave with a wide frequency range.

In some embodiments, when a plurality of sound attenuation channels 110 are disposed in the sound attenuation portion 100 of the present application, the plurality of sound attenuation channels 110 may be sequentially sleeved, specifically, the sound attenuation channels 110 with relatively long lengths may be sleeved with the sound attenuation channels 110 with relatively short lengths, and the sound attenuation channels 110 with relatively short lengths may be sleeved with the sound attenuation channels 110 with relatively short lengths. The plurality of sound damping ports 130 of the sound damping portion 100 may communicate the plurality of sound damping channels 110, and in particular, one of the sound damping ports 130 of the sound damping portion 100 may be disposed on the surface of the sound damping portion 100 such that the sound damping channel 110 having the longest length may communicate with the outside of the sound damping portion 100, and the other sound damping ports 130 of the sound damping portion 100 may be disposed between the sound damping channels 110 that are adjacently sleeved such that the sound damping channels 110 that are adjacently sleeved may be communicated. After the noise sound wave of the air flow in the air duct enters the noise elimination channel 110 at the outermost side of the noise reduction part 100 through the noise elimination opening 130 at the outermost side of the noise reduction part 100, the noise sound wave with relatively low frequency can be eliminated as the noise sound wave flows in the noise elimination channel 110. Noise sound waves that have not been eliminated may then enter the next relatively shorter length of the sound-damping channel 110 through the sound-damping ports 130 of the adjacent sound-damping channel 110, and during propagation of the noise sound waves in the sound-damping channel 110, noise sound waves having relatively higher frequencies may be eliminated. As the noise sound wave continues to flow in the sound damping channel 110, the noise sound wave may sequentially enter the sound damping channel 110 with gradually decreasing length through the other sound damping ports 130, so that the noise sound wave with low to high frequency may be eliminated.

In addition, the plurality of silencing channels 110 with sequentially reduced lengths in the noise reduction part 100 are sequentially sleeved, so that each part of space area in the noise reduction part 100 can be fully utilized, and the structure of the noise reduction part 100 is more compact. Of course, a combination of sequentially sleeving the plurality of noise elimination channels 110 of the noise reduction part 100 and arranging the noise elimination channels at intervals along the preset direction may be further provided, so that the number of the noise elimination channels 110 in the noise reduction part 100 may be relatively greater, and thus noise waves may be more sufficiently eliminated.

In some embodiments, the plurality of sequentially sleeved sound attenuation passages 110 in the sound attenuation portion 100 may be concentrically arranged, so that the plurality of sound attenuation passages 110 in the sound attenuation portion 100 may be sleeved relatively more tightly, and thus the structure of the plurality of sound attenuation passages 110 in the sound attenuation portion 100 may be more compact, so that the structure of the sound attenuation portion 100 may be more compact. Accordingly, the sound damping channels 110 in the sound damping portion 100 may be arranged in a circular ring structure, so that the intervals between the corresponding portions of the adjacent sound damping channels 110 are kept uniform, and the structure of the plurality of sound damping channels 110 in the sound damping portion 100 is further compact.

Of course, in other embodiments, the plurality of sound attenuation channels 110 of the noise attenuation portion 100 may also be eccentrically disposed, so that the manner and the location of the plurality of sound attenuation channels 110 of the noise attenuation portion 100 may be more flexible, and the length dimension of the sound attenuation channels 110 may be more flexible, so that the sound attenuation channels 110 may more specifically eliminate the noise waves with corresponding frequencies.

In some embodiments, the noise reduction portion 100 of the present application is further provided with a central noise reduction cavity 150, where the central noise reduction cavity 150 is located at the preset base point 120 of the noise reduction portion 100, and is surrounded by the noise reduction channel 110 at the innermost side of the noise reduction portion 100 and is communicated with the noise reduction channel 110, and noise waves can enter into the central noise reduction cavity 150 to be eliminated.

In some embodiments, in order to form a plurality of sequentially sleeved noise reduction channels 110 in the noise reduction portion 100 of the present application, the structure of the noise reduction portion 100 may be configured to include a plurality of noise reduction rings 140, the plurality of noise reduction rings 140 are sequentially sleeved, and a gap is formed between adjacent noise reduction rings 140, the gap may form the noise reduction channels 110 of the noise reduction portion 100, and the number of noise reduction rings 140 may be set according to the number of noise reduction channels 110 in the noise reduction portion 100. When the noise reduction part 100 of the present application needs to be installed in an air duct, a plurality of noise reduction rings 140 can be sequentially sleeved and arranged in the air duct, and the noise reduction rings 140 are connected with the air duct in a detachable manner, so that the number and the size of the noise reduction channels 110 of the noise reduction part 100 can be set according to the needs. Specifically, when the frequency range of the noise wave that can be eliminated by the noise reduction part 100 of the present application needs to be larger, a larger number of noise reduction rings 140 may be provided, and the spacing between adjacent noise reduction rings 140 is controlled, so that the spacing between adjacent noise reduction rings 140 is smaller, so that the number of noise reduction channels 110 that can be formed separately in the noise reduction part 100 is larger, and the size division of the noise reduction channels 110 is finer, and the positions of the noise reduction ports 130 provided on each noise reduction ring 140 of the noise reduction part 100 may be set according to the actual frequency of the noise wave.

In some embodiments, in order to make the noise reduction portion 100 of the present application have relatively little influence on the airflow flowing in the air duct after the noise reduction portion 100 is disposed in the air duct, when the noise reduction portion 100 is disposed in the air duct, a transition guide surface 141 may be disposed on a side wall of the noise reduction portion 100 opposite to the airflow direction in the air duct, when the airflow in the air duct flows to the noise reduction portion 100, the airflow may contact the transition guide surface 141 of the noise reduction portion 100, and the transition guide surface 141 may guide the airflow to pass through, so that the airflow may relatively smoothly bypass the noise reduction portion 100, thereby preventing the noise reduction portion 100 from blocking the air duct to some extent. Specifically, the transition guide surface 141 of the noise reduction portion 100 may be configured as an arc surface, and when the air flow in the air duct contacts the transition guide surface 141 that is the arc surface, the resistance of the arc surface to the air flow is relatively small, so that the air flow smoothly passes through the arc surface, and in addition, the air flow can smoothly flow along the extending direction of the arc surface under the effect of the coanda effect in the process of flowing on the arc surface, so that the air flow can more efficiently bypass the noise reduction portion 100.

In addition, in other embodiments, the transition guiding surface 141 of the noise reduction portion 100 may also be configured as a multi-stage bent inclined surface, specifically, the transition guiding surface 141 may include two stages of connected planes, and the connection of the two planes is opposite to the flow direction of the air flow in the air duct, when the air flow flows in the air duct, the air flow may flow along the two planes, and the extending directions of the two planes may be configured to be in the same direction as the flow direction of the air flow in the air duct, so that the air flow passes through the noise reduction portion 100 more efficiently. Of course, the transition guide surface 141 of the noise reduction portion 100 may be provided as a combination of an arc surface and a plurality of curved inclined surfaces, and the specific structure of the transition guide surface 141 is not limited in this application. Of course, it should be understood that the noise reduction ring 140 of the present application is an annular structural member, and thus the transition guide surface may naturally be an arcuate surface structure.

In some embodiments, the number of the noise reduction parts 100 may be multiple, the multiple noise reduction parts 100 may be sequentially arranged at intervals along the extending direction of the air duct, when the air flow flows in the air duct, the air flow may sequentially pass through the multiple noise reduction parts 100, so that the noise sound waves of the air flow may sequentially enter the noise reduction channels 110 of the noise reduction parts 100 through the noise reduction openings 130 of the noise reduction parts 100, so that the noise sound waves of the air flow are eliminated. The external shape of each noise reduction part 100 may be set to be uniform, so that the noise reduction effects of each noise reduction part 100 are overlapped, and of course, the structural sizes of the noise reduction channels in each noise reduction part 100 may also be set to be different, so that a better cancellation effect can be provided for broadband noise.

In some embodiments, the noise reduction device of the present application may further include a housing 200, where the housing 200 is a base member of the noise reduction device of the present application, the housing 200 may provide a mounting base for other at least partial components of the noise reduction device of the present application, an air channel 210 may be disposed in the housing 200, an air channel 210 of the housing 200 may be disposed in the noise reduction portion 100, and the air channel 210 of the housing 200 may be in communication with an air channel of a vacuum cleaner. Specifically, one end of the air duct 210 of the housing 200 may be connected to one end of the air duct of the cleaner, the air flow passing through the air duct may flow into the air duct 210 of the housing 200, and the noise sound wave of the air flow may enter the noise reducing channel 110 through the noise reducing port 130 of the noise reducing part 100 located in the housing 200, so that the noise sound wave of the air flow may be eliminated. Of course, in other embodiments, the housing 200 may also be integrally mounted within the air duct of the cleaner such that the air duct of the housing 200 is directly located within the air duct of the cleaner such that the air duct of the housing 200 may communicate with the air duct of the cleaner. Through setting up casing 200, can make the structure of the noise reduction device of this application more stable, simultaneously, when the noise reduction device of this application needs transportation, can pile up a plurality of noise reduction devices and set up mutually to make noise reduction device can keep stable in the transportation.

The noise reduction part 100 may be specifically connected to the inner wall of the housing 200, specifically, one side end surface of the noise reduction ring 140 may be in sealing connection with one side inner wall of the housing 200, and the other side end surface of the noise reduction ring 140 may be connected to the other side inner wall of the housing 200, so that both side end surfaces of the noise reduction part 100 may be in sealing connection with the inner wall of the housing 200, so that the noise reduction part 100 may communicate with the air passage 210 of the housing 200 only through the noise reduction port 130. Of course, it should be understood that the noise reduction part 100 has a gap with the inner wall of the housing 200 for the air flow to pass through.

Example two

Based on the above noise reduction device, the embodiments of the present application also provide a dust collector, which includes the above noise reduction device, specifically, the noise reduction device may be directly disposed in an air duct of the dust collector, or the air duct 210 of the housing 200 of the noise reduction device may be in communication with the air duct of the dust collector. Specifically, the cleaner may include a main body in which an air duct may be provided, the noise reduction part 100 may be provided in the air duct of the main body, or the air duct 210 of the housing 200 communicates with the air duct of the main body.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Claims (12)

1. A noise reduction device, comprising:

noise reduction portion (100), noise reduction portion (100) are interior have noise elimination passageway (110), noise reduction portion (100) have and predetermine base point (120), noise elimination passageway (110) are around predetermine base point (120) setting, noise reduction portion (100) still offer with noise elimination mouth (130) of noise elimination passageway (110) intercommunication, noise reduction portion (100) include a plurality of noise reduction rings (140) that the spacer sleeve set up in proper order, adjacent the clearance between noise reduction rings (140) constitutes noise elimination passageway (110), noise elimination mouth (130) set up in the outer wall of noise reduction rings (140).

2. The noise reduction device according to claim 1, characterized in that the sound damping mouth (130) is oriented to intersect the axial direction of the sound damping channel (110).

3. The noise reduction device according to claim 1, wherein the number of the sound attenuation passages (110) and the sound attenuation ports (130) is plural, and the plural sound attenuation ports (130) are respectively communicated with the plural sound attenuation passages (110).

4. A noise reduction device according to claim 3, wherein a plurality of the noise reduction channels (110) are sleeved in sequence, and the noise reduction channels (110) are communicated in sequence.

5. A noise reducing device according to claim 3, characterized in that a plurality of said sound damping channels (110) are arranged concentrically.

6. The noise reduction device according to claim 1, wherein the noise reduction portion (100) is further provided with a central noise reduction cavity (150), and the central noise reduction cavity (150) is surrounded and communicated by the noise reduction channel (110) located at the innermost side of the noise reduction portion (100).

7. The noise reduction device according to claim 6, characterized in that the cross section of the sound attenuation channel (110) in the axial direction of the noise reduction part (100) is annular, and the cross section of the central sound attenuation chamber (150) in the axial direction of the noise reduction part (100) is circular.

8. The noise reduction device according to any one of claims 1-7, characterized in that the noise reduction part (100) has a transition guide surface (141), which transition guide surface (141) can guide the air flow through the noise reduction part (100).

9. The noise reduction device according to claim 8, further comprising a housing (200), wherein the housing (200) has an air passage (210) therein, and wherein the noise reduction portion (100) is disposed in the air passage (210).

10. The noise reduction device according to claim 9, characterized in that the noise reduction part (100) is connected with an inner wall of the air duct (210).

11. A vacuum cleaner comprising a noise reducing part (100) and a noise reducing device as claimed in any one of claims 1-10.

12. The vacuum cleaner of claim 11, further comprising a main body having an air duct, the noise reduction portion (100) being disposed within the air duct.