WO2019011313A1 - 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
WO2019011313A1
WO2019011313A1 PCT/CN2018/095569 CN2018095569W WO2019011313A1 WO 2019011313 A1 WO2019011313 A1 WO 2019011313A1 CN 2018095569 W CN2018095569 W CN 2018095569W WO 2019011313 A1 WO2019011313 A1 WO 2019011313A1
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WO
WIPO (PCT)
Prior art keywords
sound absorbing
motor module
resonant cavity
muffling
vacuum cleaner
Prior art date
Application number
PCT/CN2018/095569
Other languages
English (en)
French (fr)
Inventor
明乐乐
张辉
胡小文
李书奇
杨柱
Original Assignee
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Priority to EP18832415.6A priority Critical patent/EP3628202B1/en
Publication of WO2019011313A1 publication Critical patent/WO2019011313A1/zh
Priority to US16/735,565 priority patent/US11486282B2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0085—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids adapted for special purposes not related to cleaning
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023—Helmholtz resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/001—Gas flow channels or gas chambers being at least partly formed in the structural parts of the engine or machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/002—Apparatus adapted for particular uses, e.g. for portable devices driven by machines or engines
    • 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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means

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
  • the motor assembly cooperates with the outer casing to define an air passage communicating with the air inlet and the air outlet;
  • the sound absorbing device is disposed at the air inlet, and the sound absorbing device defines at least a resonant cavity, one of the side walls of the resonant cavity is provided with a throat connected to the resonant cavity.
  • the noise cancellation device includes a resonance cavity and a throat, thereby utilizing the Helmholtz resonance principle to perform the noise cancellation function, and the targeted noise can be provided.
  • the main contribution frequency is to eliminate the noise, and solve 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, and Due to the small structural change of the muffler device and the low cost, the problem of high cost and poor actual experience of the active noise reduction method is solved.
  • the muffling device includes an annular first muffling member that cooperates with the outer casing to define a first resonant cavity, an inner peripheral wall of the first muffling member A first throat connected to the first resonant cavity is disposed on one of the outer peripheral walls.
  • the noise cancellation device further includes a second sound absorbing member disposed on an inner side of the first sound absorbing member, and a second resonant cavity is disposed in the second sound absorbing member
  • the second silencing member is provided with a second throat connected to the second resonant cavity.
  • the second sound absorbing member is disposed on an inner peripheral wall of the first sound absorbing member through the connecting member.
  • connection assembly is formed in an annular structure, and an inner peripheral wall and an outer peripheral wall of the connection assembly are respectively disposed by a plurality of connecting pieces spaced apart from the first silencing member and the second The muffler components are connected.
  • the second sound absorbing member includes a front end surface, a rear end surface, and an annular side plate, and a front end and a rear end of the side plate are respectively connected to the front end surface and the rear end surface to define The second resonant cavity is disposed, and the second throat is disposed on the side plate.
  • an outer peripheral wall of the first sound absorbing member is in contact with an inner wall of the air inlet, and the first throat is provided on an inner peripheral wall of the first sound absorbing member.
  • a longitudinal section of the inner peripheral wall of the first silencing member is formed as a slope that extends obliquely inward and backward.
  • the air duct includes a sound attenuating passage disposed within the motor assembly.
  • a flow path area of a portion of the air duct between the air inlet and the inlet of the sound absorbing duct gradually decreases.
  • the resonant cavity has a member of sound absorbing material.
  • the plurality of resonant cavities are configured, and the plurality of the resonant cavities are configured to have different muffling frequencies.
  • 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 side view of a motor module in accordance with an embodiment of the present disclosure
  • FIG. 3 is a cross-sectional view of a motor module in accordance with an embodiment of the present disclosure
  • FIG. 4 is a front elevational view of a sound attenuating device in accordance with an embodiment of the present disclosure
  • Figure 5 is a cross-sectional view of a sound dampening device in accordance with an embodiment of the present disclosure
  • FIG. 6 is a perspective view of a sound attenuating device in accordance with an embodiment of the present disclosure.
  • Figure 7 is a partial cross-sectional view of a sound dampening device in accordance with an embodiment of the present disclosure
  • FIG. 8 is an exploded view of a sound attenuating device in accordance with an embodiment of the present disclosure.
  • FIG. 9 is an exploded view of another direction of a muffling device in accordance with 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,
  • Motor assembly 2 motor 20, motor cover 21,
  • the muffling device 3 the first silencing member 30, the first resonant cavity 301, the first throat 302, the second silencing member 31, the second resonant cavity 311, the second throat 312, the front end surface 313, the rear end surface 314, and the side plate 315, the reinforcing column 316, the connecting component 32, the connecting piece 320,
  • 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.
  • the cleaner generally includes a dust collecting member and a filter member
  • 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
  • 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 at the air inlet 10, and the muffling device 3 defines at least one resonant cavity.
  • One of the side walls of the resonant cavity is provided with a throat communicating with the resonant cavity.
  • the shape of the resonant cavity may be a rectangular parallelepiped, a spherical shape or a special-shaped structure that satisfies the structural requirements of the whole machine.
  • the gas in the throat is like a piston.
  • the speed fluctuation caused by the action of sound waves can generate friction and damping to the gas, consuming acoustic energy;
  • the resonant cavity has a hindrance to pressure fluctuations (like a spring), while the resonant cavity is sealed, the airflow The energy loss is minimal. It can be seen that by providing the sound absorbing device and using the resonant cavity as the Helmholtz resonance muffler cavity, the sound pressure level attenuation effect on the target frequency can be significantly improved.
  • the noise reduction frequency is a certain value under the condition that the length and cross-sectional area of the throat are the same, and the more the number of openings (the smaller the diameter of the throat), the frequency decreases.
  • the holes are evenly distributed perpendicular to the direction of the air duct.
  • the diameter l of the cross section diameter of a single throat of the resonant cavity (or the diameter of a plurality of pipes equivalent to a single throat) and the width L of the flow channel (the air duct at the inlet 10) should satisfy L less than or equal to 3d, beyond this range. It is necessary to set up multiple parallel pipes until the specified range is met.
  • the middle line of the throat and the center line of the runner (the duct at the air inlet 10) are perpendicular.
  • the formula of the noise elimination frequency needs to be corrected. Under normal circumstances, the angle requirement must be met.
  • the equivalent diameter ds of the runner height direction should be less than or equal to 5d (single throat diameter or multi-throat equivalent to single throat diameter).
  • the muffler device 3 includes a resonance cavity and a throat at the air inlet 10, thereby utilizing the Helmholtz resonance principle to perform the muffling action, and may have a
  • the noise is mainly used to eliminate the noise, which solves the noise optimization bottleneck caused by the small size of the motor 20, and the flow loss is extremely small, which solves the problem of large flow resistance and sacrifice caused by noise reduction methods such as sound absorbing cotton and blocking.
  • the performance problem is also due to the small structural change of the muffler device 3 and the low cost, which solves the problem of high cost and poor actual experience of the active noise reduction method.
  • the muffling device 3 includes an annular first muffling member 30 that cooperates with the outer casing 1 to define a first resonant cavity. 301.
  • One of the inner peripheral wall and the outer peripheral wall of the first silencing member 30 is provided with a first throat 302 that communicates with the first resonant cavity 301.
  • air flows from the inside of the first silencing member 30, and the first throat 302 and the first resonant cavity 301 cooperate to play the muffling action using the Helmholtz resonance principle.
  • the first throat 302 when the first throat 302 is located on the outer peripheral wall of the first sound absorbing member 30, an air flow path should be defined between the outer peripheral wall of the first sound absorbing member 30 and the inner wall of the air inlet 10.
  • the first throat 302 may be plural and spaced apart in the circumferential direction.
  • the first resonant cavity 301 may be disposed in the first silencing member 30, or the first resonant cavity 301 may be jointly defined by the first silencing member 30 and the outer casing 1.
  • the first silencing member 30 can eliminate noise of two different frequencies such as 1250 Hz and 4240 Hz.
  • the first resonant cavity 301 can be filled with sound absorbing materials such as sound absorbing cotton, and the specific design formula of the resonant cavity can be correspondingly corrected according to the sound absorbing coefficient of the specific sound absorbing cotton.
  • the outer peripheral wall of the first silencing member 30 is in contact with the inner wall of the air inlet 10, and the first throat 302 is provided on the inner peripheral wall of the first silencing member 30. Thereby, the assembly of the first silencing member 30 is facilitated.
  • the inner peripheral wall of the first sound absorbing member 30 is provided with a plurality of first hole groups and a plurality of second hole groups, each of the first hole groups including a plurality of first pipes 302, each The second hole group includes a plurality of first throats 302, and the plurality of first hole groups and the plurality of second hole groups are staggered in the circumferential direction, and the first throat tube 302 of the first hole group is distributed and the second hole
  • the distribution of the first throat 302 of the group is different, for example, the distribution density of the first throat 302 of the first hole group is greater than the distribution density of the first throat 302 of the second hole group, so that the first sound absorbing member 30 can be eliminated. Noise at different frequencies.
  • the longitudinal section of the inner peripheral wall of the first silencing member 30 is formed as a slope that extends obliquely inwardly and rearward. Thereby, the air at the air inlet 10 can be guided, the air circulation at the air inlet 10 can be ensured, and the air flow loss can be reduced.
  • the muffling device 3 further includes a second muffling member 31, and the second muffling member 31 is disposed inside the first muffling member 30, and the second muffler
  • a second resonant cavity 302 is disposed in the component 31, and a second throat 312 communicating with the second resonant cavity 302 is disposed on the second silencing component 31.
  • an air flow path is defined between the second silencing member 31 and the first silencing member 30, air flows from the outer peripheral wall of the second silencing member 31, and the second throat 312 and the second resonant cavity 302 cooperate to utilize
  • the Helmholtz resonance principle acts as a silencer.
  • the second silencing member 31 by providing the second silencing member 31, the muffling effect can be further increased.
  • the second silencing member 31 can eliminate noise of 4240 Hz.
  • the second resonant cavity 302 can be filled with sound absorbing materials such as sound absorbing cotton, and the specific design formula of the resonant cavity can be correspondingly corrected according to the sound absorbing coefficient of the specific sound absorbing cotton.
  • the second silencing member 31 is provided on the inner peripheral wall of the first silencing member 30 through the joint assembly 32. Thereby the mounting of the second silencing member 31 is facilitated.
  • the connection assembly 32 is formed as an annular structure, and the inner peripheral wall and the outer peripheral wall of the connection assembly 32 are respectively spaced apart by a plurality of connecting pieces 320 It is connected to the first silencing member 30 and the second silencing member 31, that is, the inner peripheral wall of the connecting member 32 is connected to the second silencing member 31 through a plurality of connecting sheets 320, and the outer peripheral wall of the connecting member 32 passes through the plurality of connecting sheets 320.
  • the joint assembly 32 and the plurality of connecting pieces 320 provided on the outer peripheral wall are integrally formed.
  • the plurality of tabs 320 on the same side wall of the connection assembly 32 are evenly spaced apart in the circumferential direction.
  • the second silencing member 31 includes a front end surface 313, a rear end surface 314, and an annular side plate 315, and the front end and the rear end of the side plate 315 and the front end surface, respectively.
  • the 313 is connected to the rear end surface 314 to define a second resonant cavity 302, and the side plate 315 is provided with a second throat 312.
  • the structure of the second silencing member 31 is made simple. It is of course understood that the structure of the second silencing member 31 is not limited thereto, and for example, the second silencing member 31 may be formed in a ring structure.
  • a reinforcing post 316 is disposed in the second resonant cavity 302, and the front end and the rear end of the reinforcing post 316 are respectively connected to the front end surface 313 and the rear end surface 314.
  • the cross-sectional area of the side plates 315 gradually decreases in the direction from front to back.
  • the cross-sectional area of the second resonant cavity 311 is gradually reduced in the front-to-back direction, and the side plate 315 of the second silencing member 31 is formed as an inwardly guided guiding surface, so that the air inlet 10 can be secured. Smooth air circulation and reduced air flow loss.
  • the plurality of resonant cavities are configured such that the muffling frequencies are different. Thereby, the noise reduction effect of the motor module 100 can be improved. It can be understood that when the muffling device 3 includes the first muffling member 30 and the second muffling member 31, the muffling frequencies of the first muffling member 30 and the second muffling member 31 are different.
  • the air duct includes a sound attenuating passage provided within the motor assembly 2.
  • the noise reduction effect of the motor module 100 can be improved.
  • the flow path area of the portion of the air duct between the air inlet 10 and the inlet of the sound absorbing duct is gradually reduced, and the transition is uniform without abrupt change, for example, The linearity is reduced by law. Thereby the air flow loss can be reduced.
  • 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 and enters the labyrinth-type 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.
  • the muffler device 3 according to a specific embodiment of the present disclosure will be described in detail below with reference to FIGS.
  • the muffling device 3 includes a first silencing member 30, a second muffling member 31, and a connection assembly 32, wherein the first muffling member 30 is formed in an annular structure, and the outer peripheral wall of the first muffling member 30 is formed in a rectangular shape And being attached to the inner wall of the air inlet 10, the inner peripheral wall of the first sound absorbing member 30 has a circular cross section, and the longitudinal section of the inner circumferential surface of the first sound absorbing member 30 is formed as a slope extending obliquely inward and backward.
  • a plurality of first throats 302 are disposed on the inner peripheral wall of the sound absorbing member 30.
  • the rear side of the first sound absorbing member 30 is open, and the first sound absorbing member 30 is disposed on the outer casing 1.
  • the inner peripheral wall and the outer peripheral wall of the first sound absorbing member 30 are provided.
  • the outer casing 1 defines a first resonant cavity 301.
  • the second silencing member 31 includes a front end surface 313, a rear end surface 314 and an annular side plate 315.
  • the front end and the rear end of the side plate 315 are respectively connected to the front end surface 313 and the rear end surface 314 to define a second resonant cavity 302, the side plate 315.
  • a second throat 312 is provided thereon, and the cross-sectional area of the side plates 315 gradually decreases in the direction from front to back.
  • a plurality of spaced apart connecting pieces 320 are provided on the outer peripheral surface of the side plate 315.
  • the connecting member 32 is formed in an annular structure, and the outer peripheral wall of the connecting member 32 is provided with a plurality of spaced connecting pieces 320, and the cross-sectional area of the connecting member 32 is gradually reduced in the front-to-rear direction.
  • the first sound absorbing member 30 can be detachably connected by a nesting or an interference fit between the plurality of connecting pieces 320 and the connecting member 32, and between the second sound absorbing member 31 and the plurality of connecting pieces 320 of the connecting member 32. Nested or interference fit can be used to achieve detachable connection. It can be understood that the first silencing member 30, the second silencing member 31, the connecting assembly 32 and the plurality of connecting pieces 320 can also be integrally formed moldings.
  • An inner air inlet passage is defined between the first sound absorbing member 30 and the joint assembly 32, and an outer air inlet passage is defined between the second sound absorbing member 31 and the joint assembly 32.
  • the muffling device 3 can facilitate installation and subsequent cleaning, while the three-stage design causes the flow path to be bent, so that noise generated at the motor assembly 2 is refracted, reflected, and diffused in the muffler device 3. Equal noise cancellation helps to reduce noise.
  • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Suction Cleaners (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (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，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；消音装置(3)，消音装置(3)设在进风口(10)处，消音装置(3)内限定出至少一个共振腔，共振腔的其中一个侧壁上设有与共振腔连通的喉管。

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，所述消音装置设在所述进风口处，所述消音装置内限定出至少一个共振腔，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。
根据本公开实施例的吸尘器的电机模组，通过在进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。
在本公开的一些实施例中，所述消音装置包括环状的第一消音部件，所述第一消音部件与所述外壳配合以限定出第一共振腔，所述第一消音部件的内周壁和外周壁的其中一个上设有与所述第一共振腔连通的第一喉管。
在本公开的一些实施例中，所述消音装置还包括第二消音部件，所述第二消音部件设在所述第一消音部件的内侧，所述第二消音部件内设有第二共振腔，所述第二消音部件上设有与所述第二共振腔连通的第二喉管。
在本公开的一些实施例中，所述第二消音部件通过所述连接组件设在所述第一消音部件的内周壁上。
在本公开的一些实施例中，所述连接组件形成为环状结构，所述连接组件的内周壁和外周壁分别通过间隔设置的多个连接片与所述第一消音部件和所述第二消音部件相连。
在本公开的一些实施例中，所述第二消音部件包括前端面、后端面和环形的侧板，所述侧板的前端和后端分别与所述前端面和所述后端面相连以限定出所述第二共振腔，所述侧板上设有所述第二喉管。
在本公开的一些实施例中，所述第一消音部件的外周壁与所述进风口的内壁接触，所述第一喉管设在所述第一消音部件的内周壁上。
进一步地，所述第一消音部件的内周壁的纵截面形成为向内向后倾斜延伸的斜面。
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。
进一步地，在从所述进风口到所述出风口的方向上，所述风道的位于所述进风口和所述消音通道的进口之间的部分的流道面积逐渐减小。
优选地，共振腔内有吸音材料件。
优选地，所述共振腔为多个，多个所述共振腔被构造成消声频率不同。
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侧视图；
图3为根据本公开实施例的电机模组的剖面图；
图4为根据本公开实施例的消音装置的主视图；
图5为根据本公开实施例的消音装置的剖面图；
图6为根据本公开实施例的消音装置的立体图；
图7为根据本公开实施例的消音装置的部分剖视图；
图8为根据本公开实施例的消音装置的分解图；
图9为根据本公开实施例的消音装置的另一方向的分解图。
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、
电机组件2、电机20、电机罩21、
消音装置3、第一消音部件30、第一共振腔301、第一喉管302、第二消音部件31、第二共振腔311、第二喉管312、前端面313、后端面314、侧板315、加强柱316、连接组件32、连接片320、
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9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设在进风口10处，消音装置3内限定出至少一个共振腔，共振腔的其中一个侧壁上设有与共振腔连通的喉管。其中共振腔形状可为长方体、球形或者满足整机结构需求的异形结构等等。
具体而言，当空气流经进风口10时，一部分空气会通过喉管进入到共振腔内，此时由于如下三个方面的原理会起到消声作用：1)喉管内气体像活塞一样阻抗声波作用引起的速度波动；2)喉管形成的孔颈结构能够对气体产生摩擦及阻尼，消耗声能；3)共振腔具有对压力波动的阻碍作用(类似弹簧)，同时共振腔密闭，气流能量损失极小。由此可知，通过设置吸音装置，采用共振腔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。
在设计过程中，对于共振腔体积确定后，在保证喉管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，共振腔单个喉管截面直径d(或多个喉管等效成单个喉管直径)与流道(进风口10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直至满足规定的范围。喉管中线与流道(进风口10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(单喉管直径或多喉管等效成单喉管直径)。
根据本公开实施例的吸尘器的电机模组100，通过在进风口10处设置消音装置3，消音装置3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。
如图1、图3-图9所示，在本公开的一些实施例中，消音装置3包括环状的第一消音部件30，第一消音部件30与外壳1配合以限定出第一共振腔301，第一消音部件30的内周壁和外周壁的其中一个上设有与第一共振腔301连通的第一喉管302。具体而言，空气从第一消音部件30的内侧流过，第一喉管302和第一共振腔301配合以利用赫姆霍兹共振原理起到消音作用。可以理解的是，当第一喉管302位于第一消音部件30的外周壁时，第一消音部件30的外周壁和进风口10的内壁之间应该限定出空气流道。具体地，第一喉管302可以为多个且在周向上间隔分布。需要进行说明的是，第一共振腔301可以设在第一消音部件30内，或者第一共振腔301可以由第一消音部件30和外壳1共同限定出。在本公开的具体示例中，通过设置第一共振腔301和第一喉管302的尺寸，使得第一消音部件30可以消除两种不同频率的噪音例如1250Hz及4240Hz的噪音。
进一步地，第一共振腔301内可以填充吸音棉等吸音材料，共振腔的具体设计公式可以根据具体吸音棉的吸音系数进行相应的修正。
在图1、图3-图9所示的示例中，第一消音部件30的外周壁与进风口10的内壁接触，第一喉管302设在第一消音部件30的内周壁上。从而便于第一消音部件30的装 配。在本公开的一些具体示例中，第一消音部件30的内周壁上设有多个第一孔组和多个第二孔组，每个第一孔组包括多个第一喉管302，每个第二孔组包括多个第一喉管302，多个第一孔组和多个第二孔组在周向上交错分布，第一孔组的第一喉管302的分布情况与第二孔组的第一喉管302的分布情况不同，例如第一孔组的第一喉管302的分布密度大于第二孔组的第一喉管302的分布密度，从而使得第一消音部件30可以消除不同频率的噪音。
如图8和图9所示，在本公开的一些实施例中，第一消音部件30的内周壁的纵截面形成为向内向后倾斜延伸的斜面。从而可以对进风口10处的空气起到导向作用，可以保证进风口10处的空气流通顺畅，减小空气流动损失。
在本公开的进一步实施例中，如图1、图3-图9所示，消音装置3还包括第二消音部件31，第二消音部件31设在第一消音部件30的内侧，第二消音部件31内设有第二共振腔302，第二消音部件31上设有与第二共振腔302连通的第二喉管312。具体而言，第二消音部件31和第一消音部件30之间限定出空气流道，空气从第二消音部件31的外周壁流过，第二喉管312和第二共振腔302配合以利用赫姆霍兹共振原理起到消音作用。从而通过设置第二消音部件31，可以进一步增加消音效果。在本公开的具体示例中，通过设置第二共振腔302和第二喉管312的尺寸，使得第二消音部件31可以消除4240Hz的噪音。进一步地，第二共振腔302内可以填充吸音棉等吸音材料，共振腔的具体设计公式可以根据具体吸音棉的吸音系数进行相应的修正。
具体地，第二消音部件31通过连接组件32设在第一消音部件30的内周壁上。从而便于第二消音部件31的安装。为了减小连接组件32对空气流通的阻挡作用，在本公开的一些实施例中，连接组件32形成为环状结构，连接组件32的内周壁和外周壁分别通过间隔设置的多个连接片320与第一消音部件30和第二消音部件31相连，也就是说，连接组件32的内周壁通过多个连接片320与第二消音部件31相连，连接组件32的外周壁通过多个连接片320与第一消音部件30相连。在图8和图9所示的示例中，连接组件32与设在外周壁的多个连接片320为一体成型件。可选地，连接组件32的同一侧壁上的多个连接片320在周向上均匀间隔分布。
在本公开的具体实施例中，如图4-图9所示，第二消音部件31包括前端面313、后端面314和环形的侧板315，侧板315的前端和后端分别与前端面313和后端面314相连以限定出第二共振腔302，侧板315上设有第二喉管312。从而使得第二消音部件31的结构简单。当然可以理解的是，第二消音部件31的结构不限于此，例如第二消音部件31也可以形成为环状结构。为了提高第二消音部件31的结构强度，如图5所示， 第二共振腔302内设有加强柱316，加强柱316的前端和后端分别与前端面313和后端面314相连。
如图3-图9所示，侧板315的横截面积在从前到后的方向上逐渐减小。从而使得第二共振腔311的横截面积在从前到后的方向上逐渐减小，第二消音部件31的侧板315形成为朝内导引的导引面，从而可以保证进风口10处的空气流通顺畅，减小空气流动损失。
在本公开的优选实施例中，共振腔为多个，多个共振腔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。可以理解的是，当消音装置3包括第一消音部件30和第二消音部件31时，第一消音部件30和第二消音部件31的消声频率不同。
在本公开的一些实施例中，风道包括设在电机组件2内的消音通道。从而可以提高电机模组100的降噪效果。进一步地，在从进风口10到出风口11的方向上，风道的位于进风口10和消音通道的进口的之间的部分的流道面积逐渐减小，且过渡均匀无突变，例如可以呈线性逐减小规律。从而可以减少空气流动损失。
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内的迷宫式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。
下面参考图1-图9详细描述根据本公开具体实施例的消音装置3。
根据本公开实施例的消音装置3，包括第一消音部件30、第二消音部件31和连接组件32，其中第一消音部件30形成为环状结构，第一消音部件30的外周壁形成为矩形且贴合在进风口10的内壁上，第一消音部件30的内周壁的横截面形成为圆形，第一消音部件30的内周面的纵截面形成为向内向后倾斜延伸的斜面，第一消音部件30的内周壁上设有多个第一喉管302，第一消音部件30的后侧敞开，第一消音部件30设在外壳1上，第一消音部件30的内周壁、外周壁和外壳1限定出第一共振腔301。
第二消音部件31包括前端面313、后端面314和环形的侧板315，侧板315的前端和后端分别与前端面313和后端面314相连以限定出第二共振腔302，侧板315上设有第二喉管312，侧板315的横截面积在从前到后的方向上逐渐减小。侧板315的外周面上设有多个间隔设置的连接片320。
连接组件32形成为环状结构，连接组件32的外周壁设有多个间隔设置的连接片 320，连接组件32的横截面积在从前到后的方向上逐渐减小。
第一消音部件30通过多个连接片320与连接组件32之间可以采用嵌套或者过盈配合的方式以实现可拆卸相连，第二消音部件31和连接组件32的多个连接片320之间可以采用嵌套或者过盈配合的方式以实现可拆卸相连。可以理解的是，第一消音部件30、第二消音部件31、连接组件32和多个连接片320还可以为一体加工成型件。
第一消音部件30和连接组件32之间限定出内层进风流道，第二消音部件31和连接组件32之间限定出外层进风流道。
根据本公开实施例的消音装置3，可以便于安装和后续清灰，同时三段式设计使得流道发生弯折，因此电机组件2处产生的噪声在消音装置3中发生折射、反射、漫射等消声现象，有利于降低噪声。
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，所述消音装置设在所述进风口处，所述消音装置内限定出至少一个共振腔，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。
  2. 根据权利要求1所述的吸尘器的电机模组，其特征在于，所述消音装置包括环状的第一消音部件，所述第一消音部件与所述外壳配合以限定出第一共振腔，所述第一消音部件的内周壁和外周壁的其中一个上设有与所述第一共振腔连通的第一喉管。
  3. 根据权利要求2所述的吸尘器的电机模组，其特征在于，所述消音装置还包括第二消音部件，所述第二消音部件设在所述第一消音部件的内侧，所述第二消音部件内设有第二共振腔，所述第二消音部件上设有与所述第二共振腔连通的第二喉管。
  4. 根据权利要求3所述的吸尘器的电机模组，其特征在于，所述第二消音部件通过所述连接组件设在所述第一消音部件的内周壁上。
  5. 根据权利要求4所述的吸尘器的电机模组，其特征在于，所述连接组件形成为环状结构，所述连接组件的内周壁和外周壁分别通过间隔设置的多个连接片与所述第一消音部件和所述第二消音部件相连。
  6. 根据权利要求3-5中任一项所述的吸尘器的电机模组，其特征在于，所述第二消音部件包括前端面、后端面和环形的侧板，所述侧板的前端和后端分别与所述前端面和所述后端面相连以限定出所述第二共振腔，所述侧板上设有所述第二喉管。
  7. 根据权利要求2-6中任一项所述的吸尘器的电机模组，其特征在于，所述第一消音部件的外周壁与所述进风口的内壁接触，所述第一喉管设在所述第一消音部件的内周壁上。
  8. 根据权利要求7所述的吸尘器的电机模组，其特征在于，所述第一消音部件的内周壁的纵截面形成为向内向后倾斜延伸的斜面。
  9. 根据权利要求1-8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。
  10. 根据权利要求9所述的吸尘器的电机模组，其特征在于，在从所述进风口到所述出风口的方向上，所述风道的位于所述进风口和所述消音通道的进口之间的部分的 流道面积逐渐减小。
  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，所述共振腔内有吸音材料件。
  12. 根据权利要求1-11中任一项所述的电机模组，其特征在于，所述共振腔为多个，多个所述共振腔被构造成消声频率不同。
  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。
PCT/CN2018/095569 2017-07-14 2018-07-13 吸尘器及其电机模组 WO2019011313A1 (zh)

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