WO2019011314A1 - 吸尘器及其电机模组 - Google Patents

吸尘器及其电机模组 Download PDF

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Publication number
WO2019011314A1
WO2019011314A1 PCT/CN2018/095570 CN2018095570W WO2019011314A1 WO 2019011314 A1 WO2019011314 A1 WO 2019011314A1 CN 2018095570 W CN2018095570 W CN 2018095570W WO 2019011314 A1 WO2019011314 A1 WO 2019011314A1
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WO
WIPO (PCT)
Prior art keywords
motor module
vacuum cleaner
outer casing
disposed
motor
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PCT/CN2018/095570
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English (en)
French (fr)
Inventor
明乐乐
张辉
胡小文
李书奇
杨柱
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美的集团股份有限公司
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Application filed by 美的集团股份有限公司 filed Critical 美的集团股份有限公司
Publication of WO2019011314A1 publication Critical patent/WO2019011314A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies

Definitions

  • the present disclosure relates to the field of cleaning, and more particularly to a vacuum cleaner and a motor module thereof.
  • the noise problem of vacuum cleaners is the most important pain point for consumers in recent years. This problem is mainly solved in the industry from three aspects: noise source, propagation path and receiver.
  • the vacuum cleaner mainly has two major noise sources: electric fan and ground brush.
  • the most important means to reduce the noise of the sound source is to improve the airflow, reduce the pneumatic pulsation (pneumatic noise) in the flow field, and add support and damping (structural noise).
  • Other means but due to the small size of the motor body, it is difficult to make many changes in a small space.
  • the above-mentioned muffling method is essentially a sacrificial performance noise reduction.
  • the method is not economical, and mainly has a significant effect on high-frequency noise, and is less targeted to different frequency noises.
  • the present disclosure is intended to address at least one of the technical problems existing in the prior art.
  • the present disclosure proposes a motor module that utilizes the Helmholtz resonance principle to provide a silencing effect.
  • the present disclosure also proposes a vacuum cleaner having the above motor module.
  • a motor module of a vacuum cleaner includes: a casing having an air inlet at a front side thereof, an air outlet at a rear side of the casing, and a motor assembly, the motor assembly being disposed at the casing Internally, the motor assembly cooperates with the outer casing to define a duct communicating with the air inlet and the air outlet; a sound absorbing device, the sound absorbing device is disposed adjacent to the air outlet, and the sound absorbing device is disposed on the outer casing At least one resonant cavity is disposed thereon, and one side wall of the resonant cavity is provided with a throat communicating with the resonant cavity, and the throat is in communication with the air passage.
  • the muffling device by providing a muffling device adjacent to the air outlet, the muffling device includes a resonant cavity and a throat, thereby utilizing the Helmholtz resonance principle to provide a muffling effect, and can have a targeted pair.
  • the noise mainly contributes to the noise cancellation, which solves the noise optimization bottleneck caused by the small size of the motor body, and the flow loss is extremely small, which solves the problem of large flow resistance and sacrificing performance caused by noise reduction methods such as sound absorbing cotton and blocking.
  • the problem of high cost and poor actual experience of the active noise reduction method is solved.
  • the throat penetrates the outer casing in a thickness direction of the outer casing
  • the sound absorbing device includes a resonance casing that is open at the front side, and the resonance casing is disposed at a rear end of the outer casing.
  • the resonant cavity is defined on the outer side surface to define the housing.
  • the plurality of pipes are plural.
  • the plurality of resonant cavities are plural.
  • each of the resonant cavities is correspondingly provided with a plurality of the throats.
  • the resonance case includes a fixing bracket and a plurality of partition plates, the plurality of partition plates are disposed on the fixing bracket, the fixing bracket and each of the partition plates Each of the outer surfaces of the outer casing is in contact to define a plurality of the resonant cavities.
  • the resonant shell is an integrally formed piece.
  • the inner wall of the outer casing is provided with reinforcing ribs, and one of the reinforcing ribs is disposed between the adjacent ones of the adjacent resonant cavities.
  • annular support protrusion is disposed on an outer side surface of the outer casing, and at least a portion of the resonance housing projects into the support protrusion.
  • the plurality of resonant cavities are configured to have different muffling frequencies.
  • a sound absorbing material member is disposed within the resonant cavity.
  • the air duct includes a muffler passage disposed within the motor assembly, the muffler device being located downstream of the muffling passage.
  • a vacuum cleaner according to an embodiment of the present disclosure includes a motor module according to the above embodiment of the present disclosure.
  • the Helmholtz resonance principle is used to eliminate the sound, and the targeted noise contribution frequency can be silenced, thereby solving the small size of the motor body.
  • the noise optimization bottleneck while the flow loss is extremely small, solves the problem of large flow resistance and sacrificing performance caused by the noise reduction method such as sound absorbing cotton, blocking, etc., and the structure of the sound absorbing device is small, the cost is low, and the initiative is solved.
  • the method of noise reduction is costly and the actual experience is not good.
  • FIG. 1 is a front elevational view of a motor module in accordance with an embodiment of the present disclosure
  • FIG. 2 is a cross-sectional view of a motor module in accordance with an embodiment of the present disclosure
  • FIG. 3 is a side view of a motor module in accordance with an embodiment of the present disclosure.
  • FIG. 4 is a partial schematic view of a motor module in accordance with an embodiment of the present disclosure.
  • FIG. 5 is a schematic illustration of a back cover of a housing of a motor module in accordance with some embodiments of the present disclosure
  • FIG. 6 is a schematic view of a back cover of a casing of a motor module according to further embodiments of the present disclosure.
  • FIG. 7 is a schematic view of a back cover of a housing of a motor module in accordance with still further embodiments of the present disclosure.
  • FIG. 8 is a schematic diagram of a resonance case of a muffler device according to an embodiment of the present disclosure.
  • the outer casing 1 the air inlet 10, the air outlet 11, the outer cover 12, the front cover 13, the rear cover 14, the reinforcing rib 15, the support protrusion 16,
  • Motor assembly 2 motor 20, motor cover 21,
  • Silencing device 3 resonant cavity 30, throat 31, resonant housing 32, fixing bracket 320, partition plate 321,
  • first and second may include one or more of the features, either explicitly or implicitly.
  • a plurality of means two or more unless otherwise stated.
  • connection In the description of the present disclosure, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meanings of the above terms in the present disclosure can be understood in the specific circumstances by those skilled in the art.
  • a motor module 100 of a vacuum cleaner will be described below with reference to FIGS. 1-8, wherein the cleaner generally includes a dust collecting member and a filter member, and the motor module 100 refers to a downstream of the dust collecting member to the upstream of the filter member.
  • Module duct assembly the dust collecting member may be a dust bag or a dust cup, and the filtering member may be a HEAP filter.
  • a motor module 100 includes: a casing 1, a motor assembly 2, and a muffling device 3, wherein a front side of the casing 1 is provided with an air inlet 10, and a rear side of the casing 1 is provided with Tuyere 11.
  • the outer casing 1 includes a front cover 13, an outer cover 12 and a rear cover 14, the front and rear ends of the outer cover 12 are open, the front cover 13 is disposed at the front end of the outer cover 12 and is provided with an air inlet 10, and the rear cover 14 is disposed behind the outer cover 12.
  • the air outlet 11 is provided at the end.
  • the inlet grille 4 on the front side of the muffling device 3 may be disposed at the air inlet 10.
  • the motor assembly 2 is disposed within the outer casing 1 and the motor assembly 2 cooperates with the outer casing 1 to define an air passage that communicates with the air inlet 10 and the air outlet 11. It can be understood that the motor assembly 2 includes a motor cover 21 and a motor 20, and the motor 20 is disposed in the motor cover 21, and the motor 20 is coupled to the impeller to drive the impeller to rotate to introduce outside air into the air duct from the air inlet 10, and The air in the duct is directed to the air outlet 11.
  • the muffling device 3 is disposed adjacent to the air outlet 11, and the muffling device 3 is disposed on the outer casing 1 and is provided with at least one resonant cavity 30.
  • One side wall of the resonant cavity 30 is provided with a throat 31 communicating with the resonant cavity 30, and the throat 31 is provided.
  • the shape of the resonant cavity 30 may be a rectangular parallelepiped, a spherical shape, or a special-shaped structure that satisfies the structural requirements of the whole machine.
  • the throat 31 is like a piston and the speed fluctuation caused by the action of the acoustic wave; 2) the neck structure formed by the throat 31 can generate friction and damping of the gas, consuming acoustic energy; 3) the resonant cavity 30 has an obstructive effect on the pressure fluctuation ( Similar to the spring), while the resonant cavity 30 is sealed, the airflow energy loss is minimal. From this, it can be seen that by providing the silencing device 3 and using the resonant cavity 30 as the Helmholtz resonant muffler cavity, the sound pressure level attenuating effect on the target frequency can be significantly improved.
  • the noise reduction frequency is a certain value and the more the number of openings (the smaller the diameter of the throat 31), the noise reduction effect is obtained when the length and the cross-sectional area of the throat 31 are the same.
  • the better, the number of openings is recommended to be greater than or equal to one on the basis of meeting the process requirements.
  • the holes are evenly distributed perpendicular to the direction of the air duct.
  • the cross-sectional diameter d of the single throat 31 of the resonant cavity 30 (or the plurality of throats 31 equivalent to the diameter of the single throat 31) and the width L of the flow passage (the duct at the throat 31) need to satisfy L less than or equal to 3d, when this range is exceeded, a plurality of parallel pipes 31 are required until the specified range is satisfied.
  • the center line of the throat 31 is perpendicular to the center line of the flow passage (the duct at the throat 31).
  • the formula of the noise elimination frequency needs to be corrected.
  • the angle requirement is required.
  • the equivalent diameter ds of the flow path height direction needs to be 5 d or less (the diameter of the single throat pipe 31 or the multi-throat pipe 31 is equivalent to the diameter of the single throat pipe 31).
  • the muffling device 33 includes the resonance cavity 30 and the throat 31 by being disposed adjacent to the air outlet 11, thereby utilizing the Helmholtz resonance principle to perform the muffling action. It can correct the noise main noise contribution frequency, solve the noise optimization bottleneck caused by the small size of the motor 20, and the flow loss is very small, which solves the flow resistance caused by noise reduction methods such as sound absorbing cotton and blocking. The problem of large and sacrificing performance is small, and the cost of the noise reduction device 33 is small, and the cost is low, which solves the problem of high cost and poor actual experience of the active noise reduction method.
  • the sound absorbing material member is disposed in the resonant cavity 30, so that the sound absorbing effect of the sound absorbing device 3 can be further improved.
  • the throat 31 penetrates the outer casing 1 in the thickness direction of the outer casing 1, and the muffler device 3 includes a resonant casing 32 that is open on the front side, and the resonance casing 32 is disposed in the outer casing.
  • a resonant cavity 30 is defined between the outer surface of the rear end of the 1 and the outer casing 1.
  • the resonance case 32 is provided on the outer side surface of the rear cover 14. It is to be understood that the structure and the installation position of the muffling device 3 are not limited thereto.
  • the muffler device 3 may be a casing provided on the inner peripheral wall of the outer casing 1.
  • the throat pipe is disposed on the casing, and the casing and the casing 1 are The resonant cavity is defined between the two, as long as the sound absorbing device 3 can be provided with a resonant cavity that communicates with the air passage through the throat.
  • an annular support protrusion 16 supporting the resonance case 32 is disposed on the outer side surface of the outer casing 1, and at least a portion of the resonance case 32 protrudes into the support protrusion 16, thereby facilitating not only the resonance case 32
  • the assembly can also improve the airtightness of the resonant cavity 30.
  • the resonant shell 32 and the supporting protrusion 16 are interference fit, thereby further facilitating the assembly of the resonant shell 32, further improving the airtightness of the resonant cavity 30, and also disassembling the resonant shell 32 for cleaning, avoiding the accumulation of the resonant cavity 30. Too much affects the muffling effect. It can be understood that other cooperation manners such as snap fit and the like can be adopted between the resonance housing 32 and the support protrusions 16 .
  • each resonant cavity 30 is correspondingly provided with a throat 31 (as shown in FIG. 6).
  • the resonance case 32 includes a fixing bracket 320 and a plurality of partition plates 321 , and a plurality of partition plates 321 are disposed on the fixing bracket 320 , the fixing bracket 320 and each partition
  • the plates 321 are in contact with the outer side surfaces of the outer casing 1 to define a plurality of resonant cavities 30, respectively. That is, each of the resonant cavities 30 is defined by the partitioning plate 321, the fixed bracket 320, and the outer casing 1, and the adjacent two resonant cavities 30 are spaced apart by the partitioning plate 321 .
  • the structure of the resonance case 32 is simple.
  • the resonant housing 32 is an integrally formed piece.
  • the inner wall of the outer casing 1 is provided with reinforcing ribs 15 , and a reinforcing rib 15 is disposed between the corresponding throats 31 of the adjacent resonant cavity 30 .
  • the silencing effect of each of the resonant cavities 30 can be ensured, and at the same time, the structural strength of the outer casing 1 can be improved.
  • the air duct includes a sound attenuating passage provided in the motor assembly 2, and the sound absorbing device 3 is located downstream of the sound absorbing passage. That is, air enters the outer casing 1 from the air inlet 10, then flows through the muffler passage in the motor assembly 2, and then flows out from the muffler passage toward the air outlet 11, and the air flowing out from the muffler passage flows through the muffler 3. During the process, the muffler device 3 will be silenced. Thereby, the assembly of the muffler device 3 is facilitated, and the amount of dust entering the muffler device 3 can be reduced, and the accumulation of the ash in the cavity 30 can be prevented from affecting the muffling effect.
  • the motor cover 21 is of a multi-layer structure, and a flow space communicating with the air outlet 11 is defined between the outer peripheral wall of the motor cover 21 and the outer casing 1, and the outermost structure of the motor cover 21 is provided with An outlet connecting the flow space, a noise reduction air passage is defined between adjacent two-layer structures of the motor cover 21, and an innermost structure of the motor cover 21 is provided with an inlet, so that a motorized silencer passage is defined in the motor cover 21 to Further, the noise is further reduced, and the air flowing in from the air inlet 10 passes through the motor 20, enters the muffler passage in the motor cover 21 through the inlet, flows into the flow space from the outlet, and is finally discharged from the air outlet 11.
  • a vacuum cleaner according to an embodiment of the present disclosure includes the motor module 100 according to the above embodiment of the present disclosure.
  • the Helmholtz resonance principle is used to eliminate the sound, and the targeted noise contribution frequency can be silenced, thereby solving the small size of the motor 20 body.
  • the noise optimization bottleneck is brought about, and the flow loss is extremely small, which solves the problem of large flow resistance and sacrificing performance caused by noise reduction methods such as sound absorbing cotton and blocking, and the structure of the sound absorbing device 3 is small and the cost is low.
  • the problem of high cost and poor actual experience of the active noise reduction method is solved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

一种吸尘器及其电机模组(100)。电机模组(100)包括：外壳(1)，外壳(1)的前侧设有进风口(10)，外壳(1)的后侧设有出风口(11)；电机组件(2)，电机组件(2)设在外壳(1)内；消音装置(3)，消音装置(3)邻近出风口(11)设置，消音装置(3)设在外壳(1)上且设有至少一个共振腔(30)，共振腔(30)的其中一个侧壁上设有与共振腔(30)连通的喉管(31)，喉管(31)与风道连通。

Description

吸尘器及其电机模组 技术领域
本公开涉及清洁领域，尤其是涉及一种吸尘器及其电机模组。
背景技术
吸尘器的噪声问题是近年来消费者最主要的痛点，行业内对此问题主要从噪声源、传播路径及接受者三个方面加以解决。吸尘器主要有电风机及地刷两大噪声源，目前来说，降低声源噪声最主要的手段是改善气流流动，减少流场内的气压脉动(气动噪声)，加支撑、阻尼(结构噪声)等手段，但是由于电机本体尺寸小，很难在小空间内做很多改动。
对于噪声传播路径，更多采用消音棉等吸音材料吸收部分噪声或采用迷宫等特殊结构利用反射、折射或漫射等方式消弱声能量，但上述消音方式本质上是一种牺牲性能的降噪方法，并不经济，且主要对高频噪声作用明显，对不同频率噪音的针对性较差。
近年来，消声耳机等主动降噪措施不断涌现，但是，主动降噪方法存在着成本及用户使用舒适、便捷性等问题，目前应用不多。
发明内容
本公开旨在至少解决现有技术中存在的技术问题之一。
为此，本公开提出一种电机模组，利用赫姆霍兹共振原理起到消音作用。
本公开还提出一种具有上述电机模组的吸尘器。
根据本公开实施例的吸尘器的电机模组，包括：外壳，所述外壳的前侧设有进风口，所述外壳的后侧设有出风口；电机组件，所述电机组件设在所述外壳内，所述电机组件与外壳配合以限定出与所述进风口和所述出风口连通的风道；消音装置，所述消音装置邻近所述出风口设置，所述消音装置设在所述外壳上且设有至少一个共振腔，所述共振腔的其中一个侧壁上设有与所述共振腔连通的喉管，所述喉管与所述风道连通。
根据本公开实施例的吸尘器的电机模组，通过在邻近出风口处设置消音装置，消音装置包括共振腔和喉管，从而利用赫姆霍兹共振原理起到消音作用，可以具有针对性的对噪声主要贡献频率进行消声，解决了电机本体尺寸小带来的噪声优化瓶颈，同时流动损失极小，解决了采用吸音棉、阻挡等降噪方法带来的流动阻力大、牺牲性能的 问题，又由于消音装置的结构改动小，成本较低，解决了主动降噪方法成本高、实际体验不佳的问题。
在本公开的具体实施例中，所述喉管在所述外壳的厚度方向上贯穿所述外壳，所述消音装置包括前侧敞开的共振壳，所述共振壳设在所述外壳的后端的外侧表面上以与所述外壳之间限定出所述共振腔。
优选地，所述喉管为多个。
进一步地，所述共振腔为多个。
在本公开的具体示例中，每个所述共振腔对应设置多个所述喉管。
在本公开的一些实施例中，所述共振壳包括固定支架和多个分隔板，所述多个分隔板设在所述固定支架上，所述固定支架和每个所述分隔板分别与所述外壳的外侧表面接触以限定出多个所述共振腔。
可选地，所述共振壳为一体成型件。
在本公开的一些实施例中，所述外壳的内壁上设有加强筋，相邻的所述共振腔对应的所述喉管之间设有一个所述加强筋。
在本公开的一些实施例中，所述外壳的外侧表面上设置环形的支撑凸起，所述共振壳的至少一部分伸入到所述支撑凸起内。
在本公开的一些实施例中，多个所述共振腔被构造成消声频率不同。
在本公开的一些实施例中，所述共振腔内设有吸音材料件。
在本公开的一些实施例中，所述风道包括设在所述电机组件内的消音通道，所述消音装置位于所述消音通道的下游。
根据本公开实施例的吸尘器，包括根据本公开上述实施例的电机模组。
根据本公开实施例的吸尘器，通过设置上述的电机模组，利用赫姆霍兹共振原理起到消音作用，可以具有针对性的对噪声主要贡献频率进行消声，解决了电机本体尺寸小带来的噪声优化瓶颈，同时流动损失极小，解决了采用吸音棉、阻挡等降噪方法带来的流动阻力大、牺牲性能的问题，又由于消音装置的结构改动小，成本较低，解决了主动降噪方法成本高、实际体验不佳的问题。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明 显和容易理解，其中：
图1为根据本公开实施例的电机模组的主视图；
图2为根据本公开实施例的电机模组的剖面图；
图3为根据本公开实施例的电机模组的侧视图；
图4为根据本公开实施例的电机模组的局部示意图；
图5为根据本公开一些实施例的电机模组的外壳的后盖的示意图；
图6为根据本公开另一些实施例的电机模组的外壳的后盖的示意图；
图7为根据本公开再一些实施例的电机模组的外壳的后盖的示意图；
图8为根据本公开实施例的消音装置的共振壳的示意图。
附图标记：
电机模组100、
外壳1、进风口10、出风口11、外罩12、前盖13、后盖14、加强筋15、支撑凸起16、
电机组件2、电机20、电机罩21、
消音装置3、共振腔30、喉管31、共振壳32、固定支架320、分隔板321、
进风格栅4。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。此外，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接， 或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
下面参考图1-图8描述根据本公开实施例的吸尘器的电机模组100，其中吸尘器一般包括收尘部件和过滤部件，电机模组100指的是收尘部件的下游至过滤部件的上游的模块风道组件。具体地，收尘部件可以为尘袋或者尘杯，过滤部件可以为HEAP过滤网。
如图1所示，根据本公开实施例的电机模组100，包括：外壳1、电机组件2和消音装置3，其中外壳1的前侧设有进风口10，外壳1的后侧设有出风口11。具体地，外壳1包括前盖13、外罩12和后盖14，外罩12的前后两端敞开，前盖13设在外罩12的前端且设有进风口10，后盖14设在外罩12的后端且设有出风口11。进一步地，进风口10处可以设置位于消音装置3前侧的进风格栅4。
电机组件2设在外壳1内，电机组件2与外壳1配合以限定出与进风口10和出风口11连通的风道。可以理解的是，电机组件2包括电机罩21和电机20，电机20设在电机罩21内，电机20与叶轮相连以驱动叶轮转动以将外部空气从进风口10导引入风道内，并将风道内的空气导向出风口11。
消音装置3邻近出风口11设置，消音装置3设在外壳1上且设有至少一个共振腔30，共振腔30的其中一个侧壁上设有与共振腔30连通的喉管31，喉管31与风道连通。其中，共振腔30形状可为长方体、球形或者满足整机结构需求的异形结构等等。
具体而言，在风道内的空气流向出风口11的过程中，一部分空气会通过喉管31进入到共振腔30内，此时由于如下三个方面的原理会起到消声作用：1)喉管31内气体像活塞一样阻抗声波作用引起的速度波动；2)喉管31形成的孔颈结构能够对气体产生摩擦及阻尼，消耗声能；3)共振腔30具有对压力波动的阻碍作用(类似弹簧)，同时共振腔30密闭，气流能量损失极小。由此可知，通过设置消音装置3，采用共振腔30作为赫姆霍兹共振消声腔，可以对目标频率声压级削弱效果明显。
对于共振腔30体积确定后，在保证喉管31长度及截面积一致的情况下，降噪频率为一定值，且开孔数越多(喉管31直径越小)，该频率下降噪效果越好，建议开孔数在满足工艺要求的基础上大于等于1个，多于1个时，各孔在垂直于风道方向上均布。
根据实际需要，共振腔30的单个喉管31截面直径d(或多个喉管31等效成单个喉管31直径)与流道(喉管31处的风道)宽度L需满足L小于等于3d，超出此范围时需设置多个并联喉管31直至满足规定的范围。喉管31中线与流道(喉管31处的风 道)中线保持垂直，正负偏差超过20°时，需对消声频率公式进行修正，一般情况下需满足角度要求。流道高度方向等效直径ds需小于等于5d(单喉管31直径或多喉管31等效成单喉管31直径)。
根据本公开实施例的吸尘器的电机模组100，通过在邻近出风口11处设置消音装置33，消音装置33包括共振腔30和喉管31，从而利用赫姆霍兹共振原理起到消音作用，可以具有针对性的对噪声主要贡献频率进行消声，解决了电机20本体尺寸小带来的噪声优化瓶颈，同时流动损失极小，解决了采用吸音棉、阻挡等降噪方法带来的流动阻力大、牺牲性能的问题，又由于消音装置33的结构改动小，成本较低，解决了主动降噪方法成本高、实际体验不佳的问题。
优选地，共振腔30内设有吸音材料件，从而可以进一步提高消音装置3的消音效果。
在本公开的一些实施例中，如图1-图8所示，喉管31在外壳1的厚度方向上贯穿外壳1，消音装置3包括前侧敞开的共振壳32，共振壳32设在外壳1的后端的外侧表面上以与外壳1之间限定出共振腔30。从而使得消音装置3的结构简单，便于消音装置3的安装。具体地，共振壳32设在后盖14的外侧表面上。当然可以理解的是，消音装置3的结构和设置位置不限于此，例如消音装置3可以为设在外壳1的内周壁上的壳体，喉管设在壳体上，壳体与外壳1之间限定出共振腔，只要保证消音装置3可以设有通过喉管与风道连通的共振腔即可。
可选地，如图4所示，外壳1的外侧表面上设置支撑共振壳32的环形的支撑凸起16，共振壳32的至少一部分伸入到支撑凸起16内，从而不仅便于共振壳32的装配，还可以提高共振腔30的密闭性。进一步地，共振壳32与支撑凸起16过盈配合，从而进一步便于共振壳32的装配，进一步提高共振腔30的密闭性，还可以将共振壳32拆卸下来进行清洗，避免共振腔30积灰太多而影响消音效果。可以理解的是，共振壳32与支撑凸起16之间可以采用其他配合方式例如卡扣配合等。
优选地，喉管31为多个。从而使得消音装置3的降噪效果更好。进一步地，共振腔30为多个，每个共振腔30对应设置多个喉管31。从而可以通过调整每个共振腔30的降噪频率，可以使得消音装置3的降噪效果更好。更优选地，多个共振腔30被构造成消声频率不同。从而可以提高电机模组100的降噪效果。当然可以理解的是，当共振腔30为多个时，每个共振腔30可以对应设置一个喉管31(如图6所示)。
如图8所示，在本公开的一些示例中，共振壳32包括固定支架320和多个分隔板321，多个分隔板321设在固定支架320上，固定支架320和每个分隔板321分别与外 壳1的外侧表面接触以限定出多个共振腔30。也就是说，每个共振腔30由分隔板321、固定支架320和外壳1限定出，相邻的两个共振腔30通过分隔板321间隔开。从而使得共振壳32的结构简单。可选地，共振壳32为一体成型件。
如图5-图7所示，可选地，外壳1的内壁上设有加强筋15，相邻的共振腔30对应的喉管31之间设有一个加强筋15。从而可以保证每个共振腔30的消音效果，同时可以提高外壳1的结构强度。
在本公开的优选实施例中，风道包括设在电机组件2内的消音通道，消音装置3位于消音通道的下游。也就是说，空气从进风口10进入到外壳1内，然后流经电机组件2内的消音通道，之后从消音通道流出后朝向出风口11流动，从消音通道流出的空气在流经消音装置3的过程中会被消音装置3消声。从而便于消音装置3的装配，还可以减少进入到消音装置3的灰尘量，避免共振腔30积灰太多而影响消音效果。
在本公开的具体实施例中，电机罩21为多层结构，电机罩21的外周壁和外壳1之间限定出与出风口11连通的流动空间，电机罩21的最外层结构设有与流动空间连通的出口，电机罩21的相邻两层结构之间限定出降噪风道，电机罩21的最内层结构上设有进口，从而电机罩21内限定出迷宫式的消音通道以进一步降低噪音，从进风口10流入的空气经过电机20后通过进口进入到电机罩21内的消音通道后从出口流入到流动空间，最后从出风口11排出。
根据本公开实施例的吸尘器，包括根据本公开上述实施例的电机模组100。
根据本公开实施例的吸尘器，通过设置上述的电机模组100，利用赫姆霍兹共振原理起到消音作用，可以具有针对性的对噪声主要贡献频率进行消声，解决了电机20本体尺寸小带来的噪声优化瓶颈，同时流动损失极小，解决了采用吸音棉、阻挡等降噪方法带来的流动阻力大、牺牲性能的问题，又由于消音装置3的结构改动小，成本较低，解决了主动降噪方法成本高、实际体验不佳的问题。
根据本公开实施例的吸尘器的其他构成例如清扫部件和行驶部件等以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (13)

  1. 一种吸尘器的电机模组，其特征在于，包括：
    外壳，所述外壳的前侧设有进风口，所述外壳的后侧设有出风口；
    电机组件，所述电机组件设在所述外壳内，所述电机组件与外壳配合以限定出与所述进风口和所述出风口连通的风道；
    消音装置，所述消音装置邻近所述出风口设置，所述消音装置设在所述外壳上且设有至少一个共振腔，所述共振腔的其中一个侧壁上设有与所述共振腔连通的喉管，所述喉管与所述风道连通。
  2. 根据权利要求1所述的吸尘器的电机模组，其特征在于，所述喉管在所述外壳的厚度方向上贯穿所述外壳，所述消音装置包括前侧敞开的共振壳，所述共振壳设在所述外壳的后端的外侧表面上以与所述外壳之间限定出所述共振腔。
  3. 根据权利要求2所述的吸尘器的电机模组，其特征在于，所述喉管为多个。
  4. 根据权利要求3所述的吸尘器的电机模组，其特征在于，所述共振腔为多个。
  5. 根据权利要求4所述的吸尘器的电机模组，其特征在于，每个所述共振腔对应设置多个所述喉管。
  6. 根据权利要求4所述的吸尘器的电机模组，其特征在于，所述共振壳包括固定支架和多个分隔板，所述多个分隔板设在所述固定支架上，所述固定支架和每个所述分隔板分别与所述外壳的外侧表面接触以限定出多个所述共振腔。
  7. 根据权利要求6所述的吸尘器的电机模组，其特征在于，所述共振壳为一体成型件。
  8. 根据权利要求4-7中任一项所述的吸尘器的电机模组，其特征在于，所述外壳的内壁上设有加强筋，相邻的所述共振腔对应的所述喉管之间设有一个所述加强筋。
  9. 根据权利要求2-8中任一项所述的吸尘器的电机模组，其特征在于，所述外壳的外侧表面上设置环形的支撑凸起，所述共振壳的至少一部分伸入到所述支撑凸起内。
  10. 根据权利要求4-9中任一项所述的电机模组，其特征在于，多个所述共振腔被构造成消声频率不同。
  11. 根据权利要求1-10中任一项所述的电机模组，其特征在于，所述共振腔内设有吸音材料件。
  12. 根据权利要求1-11中任一项所述的吸尘器的电机模组，其特征在于，所述风道包括设在所述电机组件内的消音通道，所述消音装置位于所述消音通道的下游。
  13. 一种吸尘器，其特征在于，包括根据权利要求1-12中任一项所述的电机模组。
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