CN213839053U

CN213839053U - Noise elimination structure and household electrical appliances

Info

Publication number: CN213839053U
Application number: CN202022874855.0U
Authority: CN
Inventors: 赵斌; 郑中山
Original assignee: Midea Group Co Ltd; Jiangsu Midea Cleaning Appliances Co Ltd
Current assignee: Midea Group Co Ltd; Jiangsu Midea Cleaning Appliances Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-07-30
Anticipated expiration: 2030-12-04

Abstract

The utility model provides a noise cancelling structure and tame electric installation. Wherein, noise-abatement structure includes: the first shell is internally provided with a cavity; the through hole is arranged in the first shell and communicated with the cavity; the isolator sets up in the cavity, and the isolator is split into two at least noise elimination chambeies with the cavity, and two at least noise elimination chambeies communicate each other, and wherein, the natural frequency in two arbitrary noise elimination chambeies in two at least noise elimination chambeies is different. The utility model provides an anechoic chamber among the noise cancelling structure can take place the resonance with the sound wave to consume the kinetic energy in the sound wave, reach the effect of noise reduction. The noise in the target frequency range is reduced by the anechoic cavity by designing the natural frequency of the anechoic cavity in the anechoic structure. The noise elimination structure is designed according to the frequency of the required noise reduction, the noise is reduced in a targeted manner, and the effect of removing the noise is improved.

Description

Noise elimination structure and household electrical appliances

Technical Field

The utility model relates to a technical field of making an uproar falls particularly, relates to a noise cancelling structure and a household electrical appliances.

Background

The motor is widely applied to various household appliances, the motor can generate frequency conversion noise in the operation process, and the noise generated by the blade and the noise of specific frequency generated by the structural vibration leak to the outside of the motor. How to reduce noise has become an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, the utility model discloses a first aspect provides a noise cancelling structure.

A second aspect of the present invention provides a home appliance.

In view of this, according to the utility model discloses a first aspect provides a noise cancelling structure, includes: the first shell is internally provided with a cavity; the through hole is arranged in the first shell and communicated with the cavity; the isolator sets up in the cavity, and the isolator is split into two at least noise elimination chambeies with the cavity, and two at least noise elimination chambeies communicate each other, and wherein, the natural frequency in two arbitrary noise elimination chambeies in two at least noise elimination chambeies is different.

The utility model provides a noise cancelling structure, including first casing, the through-hole of setting on first casing among the noise cancelling structure to and set up the separator in first casing. The first shell is internally provided with a cavity, the partition piece is arranged in the cavity and divides the whole cavity into a plurality of silencing cavities, each divided silencing cavity is communicated with each other, and the natural frequency of each divided silencing cavity is different. The through hole sets up on first casing, and the through hole can make the air enter into the cavity of first casing, because at least two noise elimination chambeies communicate each other, so the air can enter into every noise elimination intracavity. The noise elimination cavity filters noise selectively through the Helmholtz resonance cavity principle, namely when the frequency of noise is close to the natural frequency of the noise elimination cavity, the noise elimination cavity can resonate with sound waves, so that the kinetic energy in the sound waves is consumed, and the effect of reducing the noise is achieved. The noise in the target frequency range is reduced by the anechoic cavity by designing the natural frequency of the anechoic cavity in the anechoic structure. The noise elimination structure is designed according to the frequency of the required noise reduction, the noise is reduced in a targeted manner, and the effect of removing the noise is improved.

A plurality of silencing cavities are arranged in the silencing structure and are communicated with one another, so that sound waves can be transmitted between every two silencing cavities. The inherent frequency of each silencing cavity in the silencing structure is different, so that the silencing structure can accurately eliminate noises in a plurality of frequency bands, and a broadband noise reduction effect is achieved. Compare in prior art fall the structure of making an uproar and only can reduce the noise in the narrower frequency channel, have the effect that the multifrequency section reduces the noise, improved the utility model discloses well noise cancelling structure's application scope is fit for the multi-scene and uses.

In one embodiment, the sound attenuating structure is provided in the vacuum cleaner. The dust collector has four working gears, and each working gear corresponds to different rotating speeds of the fan. The fan can produce the noise of different frequencies with the work of different rotational speeds, sets up four different noise elimination chambeies in with noise cancelling structure to correspond the setting with the natural frequency in every noise elimination chamber and the different rotational speeds of fan, realized no matter what kind of work gear down work of dust catcher, the noise that the fan produced can all be reduced to different noise elimination chambeies in the noise cancelling structure.

It can be understood that air enters the at least two silencing cavities from the through holes, the air and the silencing cavities form a noise reduction structure, and the natural frequency of the silencing cavities is the frequency of the noise reduction structure when the noise reduction structure does simple harmonic vibration.

The natural frequency of the muffling cavity is related to the volume, shape and the like of the muffling cavity and is also related to the material of the first shell. The natural frequency of the anechoic cavity can be changed by adjusting the setting position of the isolating piece and the shape of the isolating piece.

In a specific embodiment, a vent hole is formed in the partition plate between any two adjacent silencing cavities. After entering the cavity, the air can flow into each different silencing cavity through the vent holes, so that all silencing cavities in the silencing structure are communicated with each other.

In another embodiment, a gap is provided between the partition plate disposed in the cavity and the housing. After the air enters the cavity, the air can flow into different silencing cavities through the gaps between each partition plate and the shell, so that all silencing cavities in the silencing structure are communicated with each other.

In addition, according to the utility model provides an among the above-mentioned technical scheme, can also have following additional technical features:

in one possible design, the volumes of any two of the at least two muffling chambers are not the same.

In this design, the volumes of each of the at least two muffling chambers are set to be different from each other. The air enters the silencing cavities with different volumes through the through holes, the air and the silencing cavities form a noise reduction structure, and because the volumes of the silencing cavities are different, the air amount in each silencing cavity is different, so that the natural frequencies of the noise reduction structures formed by the air and the silencing cavities are different, namely the natural frequencies of at least two silencing cavities are different. The silencing structure is provided with the silencing cavities with different natural frequencies, so that the silencing structure can accurately eliminate noises in a plurality of frequency bands, and a broadband noise reduction effect is achieved. Compare in prior art fall the structure of making an uproar and only can reduce the noise in the narrower frequency channel, have the effect that the multifrequency section reduces the noise, improved the utility model discloses well noise cancelling structure's application scope is fit for the multi-scene and uses.

In one possible design, the number of the spacers is at least two, and the shape of any two spacers of the at least two spacers is different.

In this design, the partition forms together with the first housing an anechoic chamber, the natural frequency of which is not only related to the volume but also to the shape of the anechoic chamber. The partition pieces forming the silencing cavities are set to be different in shape, so that the shapes of the silencing cavities can be changed, and the natural frequency of each silencing cavity in the silencing structure is different. Through the anechoic chamber that has set up a plurality of different natural frequencies in noise cancelling structure, compare the structure of making an uproar of falling among the prior art and only can reduce the noise in the narrower frequency channel, have the effect that multifrequency section reduces the noise, improved the utility model discloses well noise cancelling structure's application scope is fit for many scenes and uses.

In one possible design, the communication area between two adjacent muffling chambers is different.

In the design, each silencing cavity in the silencing structure is communicated with each other, so that air can enter each silencing cavity. The silencing cavities which are communicated with each other can enable sound waves to be transmitted between the two adjacent silencing cavities, and noise can be transmitted to each silencing cavity in the cavity through the through holes. The communication areas between the plurality of silencing cavities are set to be different in size, so that the communication areas between two adjacent silencing cavities are correspondingly set with the inherent frequency of the silencing cavities, the transmission efficiency of sound waves between different silencing cavities is improved, and the noise eliminating effect of the silencing structure is further improved.

In a specific embodiment, a vent hole is formed in the partition plate between any two adjacent silencing cavities. After entering the cavity, the air can flow into each different silencing cavity through the vent holes, so that all silencing cavities in the silencing structure are communicated with each other. The sizes of the vent holes formed in each partition board are different, so that the communicating areas between two adjacent silencing cavities are different.

In another embodiment, a gap is provided between the partition plate disposed in the cavity and the housing. After the air enters the cavity, the air can flow into different silencing cavities through the gaps between each partition plate and the shell, so that all silencing cavities in the silencing structure are communicated with each other. By coupling the partition to the housing.

In one possible design, the number of through holes is one.

In this design, only set up a through-hole on the casing, the through-hole makes the air flow in the cavity of first casing to can guarantee that the air that flows in the cavity can not flow out from the through-hole fast, guarantee the stability of the natural frequency in noise elimination chamber, avoid the air volume in the cavity to be in the change state and lead to the natural frequency in noise elimination chamber to change, and then improved the stability that noise cancelling structure made an uproar falls.

In one possible design, the via includes: the first through hole is arranged in the first shell and communicated with any one of the at least two silencing cavities; the second through hole is formed in the first shell and communicated with the other silencing cavity of the at least two silencing cavities.

In this design, the vias include a first via and a second via. The first through hole and the second through hole are both arranged on the first shell. The first through hole is communicated with any one of the at least two silencing cavities, and the second through hole is communicated with the other one of the at least two silencing cavities. The sound wave can be transmitted to two different silencing cavities through the first through hole and the second through hole, the sound wave can be transmitted to different silencing cavities in the cavity from two different positions, and the time for transmitting the sound wave to each silencing cavity is shortened.

In a specific embodiment, the first shell is divided into three equal parts along the distribution direction of the silencing cavities, and the first through hole and the second through hole are respectively arranged at equal division points of the first shell. The noise can be transmitted into the cavity of the silencing structure from the first through hole and/or the second through hole, namely, the noise can be transmitted in the cavity by taking the setting position of the first through hole and/or the setting position of the second through hole as a transmission starting point, so that the path length of the noise transmitted to the silencing cavity corresponding to the noise frequency is shortened, the noise can be rapidly transmitted to the corresponding silencing cavity, and the noise eliminating effect of the silencing structure is improved.

In one possible design, the flow areas of the first and second through-holes are different.

In this design, the flow area of first through-hole and second through-hole is different, and the position that sets up of first through-hole and second through-hole is different, and first through-hole is different with the distance of second through-hole apart from noise source promptly, so set up the flow area of first through-hole and second through-hole into not unidimensional, guarantee that the noise can all transmit to sound-attenuating structure's cavity through first through-hole and second through-hole.

It can be understood that the flow areas of the first and second through holes are flexibly set according to the distance between the first and second through holes and the noise source.

In a specific embodiment, a distance between the first via and the noise source is less than a distance between the second via and the noise source. The size of the second through hole is larger than that of the first through hole, so that the second through hole can transmit noise to a noise elimination cavity of the noise elimination structure.

In one possible design, the sound-attenuating structure further includes: and the air guide channel penetrates through the first shell and is communicated with the first through hole and/or the second through hole.

In the design, the silencing structure is also provided with an air guide channel. Noise that the noise source produced can regard the air as the medium transmission, through set up the wind-guiding passageway that link up first casing in noise-abatement structure to set up the through-hole and be linked together with first wind-guiding passageway, guaranteed that the noise can be along with the air transmission to the through-hole position that flows, via the through-hole in noise-abatement structure's the cavity. The noise elimination effect on the air circulation path is realized, and the noise elimination effect of the noise elimination structure is further improved.

In a specific embodiment, the wind eliminating and guiding channel penetrates through the first shell to enable the first shell to be in an annular structure, the first through hole and the second through hole are formed in the inner ring side wall of the annular shell and are arranged oppositely, and the first through hole and the second through hole are communicated with the wind guiding channel, so that the wind eliminating and guiding channel is suitable for a scene where the wind guiding channel is opposite to a noise source. The first through hole is used as a starting point, the second through hole is used as an end point, noise is transmitted along the plurality of silencing cavities, the transmission paths of the noise comprise two paths, and the lengths of the two paths are the same. The path length of the noise elimination cavity corresponding to the noise frequency is reduced, so that the noise can be quickly transmitted to the corresponding noise elimination cavity, and the noise elimination effect of the noise elimination structure is improved.

In another embodiment, either one of the first through hole and the second through hole is communicated with the air guide channel, and the other one is not communicated with the air guide channel. The noise elimination structure can eliminate the noise transmitted by the air guide channel and the noise not transmitted by the air guide channel at the same time, and is suitable for scenes with larger noise sources and incapable of completely corresponding to the air guide channel.

In one possible design, the first housing includes: a first sub-housing; and the first sub-shell is detachably connected with the second sub-shell.

In this design, the first housing includes a first sub-housing and a second sub-housing. The first shell arrangement is formed by combining the first sub-shell and the second sub-shell, so that the structure in the first shell is convenient to manufacture. In particular, it is convenient to provide a plurality of spacers of different shapes and sizes within the first housing.

In the use process of the silencing structure, air can enter the cavity of the first shell through the through hole, and dust, water and the like can enter the cavity along with the air, so that the through hole is easily blocked, and the volume in the cavity is changed. Set up first sub-casing and the sub-casing of second into detachable structure, can be with first casing split for first sub-casing and the sub-casing of second, be convenient for clear up the through-hole of setting on first casing to and the cavity in the first casing.

In a specific embodiment, the through-hole comprises a first half-hole and a second half-hole, the first half-hole is arranged on the first sub-shell, the second half-hole is arranged on the second sub-shell, and after the first sub-shell and the second sub-shell are assembled together, the first half-hole and the second half-hole can be combined to form the through-hole. In the use, if the through-hole takes place blocking phenomenon, then dismantle the back with first sub-casing and second sub-casing, clear up first half hole and second half hole respectively. Further facilitating the cleaning of the through hole by the user.

In one possible design, the first housing further includes: the first connecting piece is arranged on the first sub-shell; the second connecting piece is arranged on the second sub-shell, and the first sub-shell is detachably connected with the second sub-shell through the first connecting piece and the second connecting piece.

In this design, the first housing further comprises a first connector and a second connector detachably connected. The first connecting piece is arranged on the first sub-shell, the second connecting piece is arranged on the second sub-shell, and the first shell is quickly disassembled and installed by disassembling the first connecting piece and the second connecting piece.

In one embodiment, the first connecting member and the second connecting member are selected to be magnetic attraction structures, and the first connecting member and the second connecting member are respectively arranged on the opposite surfaces of the first sub-housing and the second sub-housing.

According to the utility model discloses a second aspect provides a household electrical appliance, include: the second shell is provided with an accommodating cavity; the motor is arranged in the accommodating cavity; the sound attenuating structure of any of the possible designs of the first aspect described above is connected to the second housing, the sound attenuating structure being disposed opposite the motor.

In this embodiment, a home appliance is provided. The household appliance comprises a second shell, a motor arranged in the second shell, and a silencing structure arranged opposite to the motor. The motor of the household appliance can generate larger noise in the process of re-running, and the noise is filtered by the noise elimination structure after passing through the noise elimination structure arranged opposite to the motor, so that the noise of the motor is reduced.

In a specific embodiment, the motor has four different rotating speeds, the motor can generate noises with different frequencies when working at different rotating speeds, four different silencing cavities are arranged in the silencing structure, and the natural frequency of each silencing cavity is arranged corresponding to the different rotating speeds of the motor, so that the different silencing cavities in the silencing structure can reduce the noises generated by the fan no matter what rotating speed the motor works at.

Additionally, according to the utility model discloses above-mentioned technical scheme's household electrical appliances still has following additional technical characterstic:

in one possible design, the second housing includes: a third sub-housing; and the air exhaust structure is detachably connected with the third sub-shell, and the silencing structure is arranged in the air exhaust structure.

In this design, the second housing includes a third sub-housing and an air exhaust structure, the noise generated by the motor can be transmitted by using air as a medium, and the air exhaust structure is arranged in the household electrical appliance to guide the flow direction of the air, so that the noise can be leaked out of the household electrical appliance through the exhaust hood. The silencing structure is arranged in the air exhaust structure, so that the silencing structure and a noise source are arranged relatively, and the noise can be transmitted to the position of the through hole along with flowing air and transmitted to the cavity of the silencing structure through the through hole. The noise elimination effect on the air circulation path is realized, and the noise elimination effect of the noise elimination structure is further improved.

In one possible design, the sound attenuating structure includes a wind guide channel, and the air exhausting structure includes: the third connecting piece is detachably connected with the third sub-shell; and the exhaust hood is connected with the third connecting piece and is provided with an exhaust channel which is communicated with the air guide channel of the silencing structure.

In the design, the air exhaust structure comprises a third connecting piece and an air exhaust cover, an air exhaust channel is arranged on the air exhaust cover, the air exhaust channel is communicated with an air guide channel in the noise elimination structure, and therefore noise can be transmitted into the air guide channel along with flowing air, then flows through the through hole in the noise elimination structure, and is transmitted into the cavity of the noise elimination structure through the through hole. The noise elimination effect on the air circulation path is realized, and the noise elimination effect of the noise elimination structure is further improved.

In one possible design, the air exhaust channel and the air guide channel of the silencing structure are arranged coaxially.

In the design, the air guide channel and the air exhaust channel of the noise elimination structure are coaxially arranged, so that the air flowing through the air exhaust channel can enter the air guide channel in the noise elimination structure, and the noise removal effect of the noise elimination structure on the motor can be improved.

In one possible design, the flow area of the air exhaust channel is smaller than or equal to the flow area of the air guide channel of the noise elimination structure.

In the design, the flow area of the air guide channel provided with the noise elimination structure is larger than that of the air exhaust channel, so that most of noise generated by the motor can flow through the air guide channel of the noise elimination structure and flow into the noise elimination structure, and the noise elimination effect of the noise elimination structure on the noise generated by the motor is improved.

In one possible design, the air venting structure further comprises: the limiting part is arranged on the inner side wall of the exhaust hood and abuts against the silencing structure to limit the limiting part to be separated from the exhaust hood.

In the design, the silencing structure is positioned on the inner side wall of the exhaust hood through the limiting piece, so that the silencing structure is prevented from displacing under the action of air flowing.

In one possible design, the household appliance includes a vacuum cleaner, a blender, and a fan.

It is understood that the above choice of home devices is not limiting, and that home devices may be configured in other forms without departing from the spirit and scope of the present application.

Additional aspects and advantages in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a sound-damping structure according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of a sound-attenuating structure according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a home appliance according to an embodiment of the present invention;

fig. 4 is an exploded view of the exhaust hood and muffler structure of a household appliance in accordance with an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a home appliance according to another embodiment of the present invention;

fig. 6 shows a schematic structural diagram of an air exhaust structure and a noise elimination structure in a household electrical appliance according to an embodiment of the present invention;

fig. 7 shows a schematic structural diagram of an air exhaust structure and a noise elimination structure in a household electrical appliance according to another embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100 sound attenuation structures, 120 first shells, 122 first subshells, 124 second subshells, 140 isolating pieces, 160 cavities, 180 through holes, 182 first through holes, 184 second through holes, 190 wind guide channels, 200 household appliances, 220 second shells, 222 third subshells, 224 air exhaust structures, 2242 third connecting pieces, 2244 exhaust hoods, 2246 air exhaust channels, 226 limiting pieces and 240 motors.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A sound-deadening structure and a home appliance provided according to some embodiments of the present invention will be described below with reference to fig. 1 to 7.

Example one

As shown in fig. 1, a first embodiment of the present invention provides a sound-deadening structure 100, including: first housing 120, cavity 160, through-hole 180, spacer 140. Wherein, the cavity 160 is disposed in the first housing 120, and the through hole 180 is disposed on the first housing 120, so that the cavity 160 is communicated with the through hole 180; the partition 140 is disposed in the cavity 160 of the first housing 120, the partition 140 divides the cavity 160 into at least two muffling chambers, the at least two muffling chambers are communicated with each other, and any two muffling chambers of the at least two muffling chambers have different natural frequencies.

In this embodiment, the sound-deadening structure 100 includes the first housing 120, the through-hole 180 provided on the first housing 120, and the partition 140 provided inside the first housing 120. The first housing 120 has a cavity 160 formed therein, and the partition 140 is disposed in the cavity 160, dividing the entire cavity 160 into a plurality of muffling chambers, wherein the divided muffling chambers are communicated with each other, and the natural frequencies of the divided muffling chambers are different. The through hole 180 is provided on the first housing 120, and the through hole 180 enables air to enter into the cavity 160 of the first housing 120, and since at least two muffling chambers are communicated with each other, air can enter into each muffling chamber. The noise elimination cavity filters noise selectively through the Helmholtz resonance cavity principle, namely when the frequency of noise is close to the natural frequency of the noise elimination cavity, the noise elimination cavity can resonate with sound waves, so that the kinetic energy in the sound waves is consumed, and the effect of reducing the noise is achieved. The acoustic cavity reduces noise in the target frequency range by designing the natural frequency of the acoustic cavity in the acoustic structure 100. The noise reduction structure 100 is designed according to the frequency of the required noise reduction, so that the noise is reduced in a targeted manner, and the effect of removing the noise is improved.

The silencing structure 100 is provided with a plurality of silencing cavities, and the plurality of silencing cavities are communicated with each other, so that sound waves can be transmitted between each silencing cavity. The natural frequency of each muffling cavity in the muffling structure 100 is different, so that the muffling structure 100 can accurately eliminate noise in multiple frequency bands, and a broadband noise reduction effect is achieved. Compare in prior art the structure of making an uproar of falling only can reduce the noise in the narrower frequency channel, have the effect of multifrequency section noise reduction, improved the utility model discloses well noise cancelling structure 100's application scope is fit for the multi-scene and uses.

In one embodiment, the sound attenuating structure 100 is provided in a vacuum cleaner. The dust collector has four working gears, and each working gear corresponds to different rotating speeds of the fan. The fan can produce the noise of different frequencies with the work of different rotational speeds, sets up four different noise elimination chambeies in noise cancelling structure 100 to correspond the setting with the natural frequency in every noise elimination chamber and the different rotational speeds of fan, realized no matter what kind of work gear down work of dust catcher, the noise that the fan produced can all be reduced to different noise elimination chambeies in noise cancelling structure 100.

It can be understood that air enters at least two silencing cavities from the through hole 180, the air and the silencing cavities form a noise reduction structure, and the natural frequency of the silencing cavities is the frequency of the noise reduction structure when the noise reduction structure does simple harmonic vibration.

The natural frequency of the muffling cavity is related to the volume, shape, etc. of the muffling cavity, and is also related to the material of the first housing 120. By adjusting the position where the partition 140 is provided and adjusting the shape of the partition 140, the natural frequency of the muffling chamber can be changed.

In a specific embodiment, a vent hole is formed in the partition plate between any two adjacent silencing cavities. After entering the cavity 160, the air can flow into each different muffling cavity through the vent holes, so that all the muffling cavities in the muffling structure 100 are communicated with each other.

In another embodiment, a gap is provided between the partition and the housing provided in the cavity 160. After entering the cavity 160, the air can flow into different muffling cavities through the gap between each partition and the housing, so that all muffling cavities in the muffling structure 100 are communicated with each other.

Example two

As shown in fig. 1 and 2, a second embodiment of the present invention provides a sound-deadening structure 100 including: first housing 120, cavity 160, through-hole 180, spacer 140. Wherein, the cavity 160 is disposed in the first housing 120, and the through hole 180 is disposed on the first housing 120, so that the cavity 160 is communicated with the through hole 180; the partition 140 is disposed in the cavity 160 of the first housing 120, the partition 140 divides the cavity 160 into at least two muffling chambers, the at least two muffling chambers are communicated with each other, and any two muffling chambers of the at least two muffling chambers have different natural frequencies.

Wherein, the volumes of any two of the at least two muffling cavities are different.

In this embodiment, the volumes of each of the at least two muffling chambers are set to be different from each other. Air enters the silencing cavities with different volumes through the through holes 180, the air and the silencing cavities form a noise reduction structure, and because the volumes of the silencing cavities are different, the air amount in each silencing cavity is different, so that the natural frequencies of the noise reduction structures formed by the air and the silencing cavities are different, namely the natural frequencies of at least two silencing cavities are different. By arranging a plurality of muffling cavities with different natural frequencies in the muffling structure 100, the muffling structure can accurately eliminate noises in a plurality of frequency bands, and a broadband noise reduction effect is achieved. Compare in prior art the structure of making an uproar of falling only can reduce the noise in the narrower frequency channel, have the effect of multifrequency section noise reduction, improved the utility model discloses well noise cancelling structure 100's application scope is fit for the multi-scene and uses.

The sound attenuation structure 100 includes a first housing 120, a through hole 180 provided on the first housing 120, and a spacer 140 provided inside the first housing 120. The first housing 120 has a cavity 160 formed therein, and the partition 140 is disposed in the cavity 160, dividing the entire cavity 160 into a plurality of muffling chambers, wherein the divided muffling chambers are communicated with each other, and the natural frequencies of the divided muffling chambers are different. The through hole 180 is provided on the first housing 120, and the through hole 180 enables air to enter into the cavity 160 of the first housing 120, and since at least two muffling chambers are communicated with each other, air can enter into each muffling chamber. The noise elimination cavity filters noise selectively through the Helmholtz resonance cavity principle, namely when the frequency of noise is close to the natural frequency of the noise elimination cavity, the noise elimination cavity can resonate with sound waves, so that the kinetic energy in the sound waves is consumed, and the effect of reducing the noise is achieved. The acoustic cavity reduces noise in the target frequency range by designing the natural frequency of the acoustic cavity in the acoustic structure 100. The noise reduction structure 100 is designed according to the frequency of the required noise reduction, so that the noise is reduced in a targeted manner, and the effect of removing the noise is improved.

The first housing 120 has a cavity 160 formed therein, and the partition 140 is disposed in the cavity 160, dividing the entire cavity 160 into a plurality of muffling chambers, wherein the divided muffling chambers are communicated with each other, and the natural frequencies of the divided muffling chambers are different. The through hole 180 is provided on the first housing 120, and the through hole 180 enables air to enter into the cavity 160 of the first housing 120, and since at least two muffling chambers are communicated with each other, air can enter into each muffling chamber. The noise elimination cavity filters noise selectively through the Helmholtz resonance cavity principle, namely when the frequency of noise is close to the natural frequency of the noise elimination cavity, the noise elimination cavity can resonate with sound waves, so that the kinetic energy in the sound waves is consumed, and the effect of reducing the noise is achieved. The acoustic cavity reduces noise in the target frequency range by designing the natural frequency of the acoustic cavity in the acoustic structure 100. The noise reduction structure 100 is designed according to the frequency of the required noise reduction, so that the noise is reduced in a targeted manner, and the effect of removing the noise is improved.

As shown in fig. 2, in the above embodiment, the number of the spacers 140 is at least two, and the shape of any two spacers 140 of the at least two spacers 140 is different.

In this embodiment, the partition 140 forms together with the first housing 120 an anechoic chamber, the natural frequency of which is not only related to the volume but also to the shape of the anechoic chamber. By providing the partition 140 forming each muffling chamber with a different shape, the shape of the muffling chamber can be changed so that the natural frequency of each muffling chamber in the muffling structure 100 is different. Through the anechoic chamber that has set up a plurality of different natural frequencies in noise cancelling structure 100, compare the structure of making an uproar of falling among the prior art and only can reduce the noise in the narrower frequency channel, have the effect that the multifrequency section reduces the noise, improved the utility model discloses well noise cancelling structure 100's application scope is fit for many scenes and uses.

In any of the above embodiments, the communication area between two adjacent muffling chambers is different.

In this embodiment, each muffling cavity in the muffling structure 100 is communicated with each other, so that air can be ensured to enter each muffling cavity. The mutually communicated silencing cavities can enable sound waves to be transmitted between two adjacent silencing cavities, and ensure that noise can be transmitted to each silencing cavity in the cavity 160 through the through hole 180. The communication areas between the plurality of muffling cavities are set to be different in size, so that the communication areas between two adjacent muffling cavities are set to correspond to the natural frequency of the muffling cavities, the transmission efficiency of sound waves between different muffling cavities is improved, and the noise eliminating effect of the muffling structure 100 is further improved.

In a specific embodiment, a vent hole is formed in the partition plate between any two adjacent silencing cavities. After entering the cavity 160, the air can flow into each different muffling cavity through the vent holes, so that all the muffling cavities in the muffling structure 100 are communicated with each other. The sizes of the vent holes formed in each partition board are different, so that the communicating areas between two adjacent silencing cavities are different.

In another embodiment, a gap is provided between the partition and the housing provided in the cavity 160. After entering the cavity 160, the air can flow into different muffling cavities through the gap between each partition and the housing, so that all muffling cavities in the muffling structure 100 are communicated with each other. By coupling the partition to the housing.

In any of the above embodiments, the number of through holes 180 is one.

In this embodiment, only one through hole 180 is disposed on the housing, and the through hole 180 allows air to flow into the cavity 160 of the first housing 120, and can ensure that the air flowing into the cavity 160 does not flow out of the through hole 180 quickly, thereby ensuring the stability of the natural frequency of the muffling cavity, avoiding the natural frequency of the muffling cavity from changing due to the fact that the air volume in the cavity 160 is in a changing state, and further improving the noise reduction stability of the muffling structure 100.

In one possible design, via 180 includes: the first through hole 182 and the second through hole 184, and the first through hole 182 and the second through hole 184 are provided on the first housing 120. The first through hole 182 communicates with any one of the at least two muffling chambers, and the second through hole 184 communicates with another one of the at least two muffling chambers.

In this embodiment, the through-holes 180 include a first through-hole 182 and a second through-hole 184. The first through hole 182 and the second through hole 184 are both provided on the first housing 120. The first through hole 182 communicates with any one of the at least two muffling chambers, and the second through hole 184 communicates with the other one of the at least two muffling chambers. The sound waves can be transmitted into two different silencing cavities through the first through hole 182 and the second through hole 184, so that the sound waves can be transmitted into different silencing cavities in the cavity 160 from two different positions, and the time for transmitting the sound waves to each silencing cavity is shortened.

In one embodiment, the first housing 120 is divided into three equal parts along the distribution direction of the muffling chamber, and the first through hole 182 and the second through hole 184 are respectively disposed at equal division points of the first housing 120. The noise can be transmitted into the cavity 160 of the muffling structure 100 from the first through hole 182 and/or the second through hole 184, that is, the noise can be transmitted in the cavity 160 with the setting position of the first through hole 182 and/or the setting position of the second through hole 184 as the transmission starting point, so that the path length of the noise transmitted to the muffling cavity corresponding to the noise frequency is shortened, the noise can be quickly transmitted to the corresponding muffling cavity, and the noise-eliminating effect of the muffling structure 100 is improved.

In any of the above embodiments, the first and second through

holes

182, 184 have different flow areas.

In this embodiment, the flow areas of the first through hole 182 and the second through hole 184 are different, and the positions of the first through hole 182 and the second through hole 184 are different, that is, the distances from the noise source to the first through hole 182 and the second through hole 184 are also different, so that the flow areas of the first through hole 182 and the second through hole 184 are set to be different sizes, and the noise can be transmitted into the cavity 160 of the sound-deadening structure 100 through the first through hole 182 and the second through hole 184.

It can be understood that the flow areas of the first and second through

holes

182 and 184 are flexibly set according to the distances between the first and second through

holes

182 and 184 and the noise source.

In a particular embodiment, the distance between the first via 182 and the noise source is less than the distance between the second via 184 and the noise source. Setting the size of the second through hole 184 to be larger than the size of the first through hole 182 ensures that the second through hole 184 can also transmit noise into the sound-deadening chamber of the sound-deadening structure 100.

In any of the above embodiments, the sound attenuation structure 100 further includes: the air guide passage 190 penetrates the first housing 120, and the air guide passage 190 communicates with the first through hole 182 and/or the second through hole 184.

In this embodiment, the sound attenuation structure 100 is further provided with an air guiding channel. The noise generated by the noise source can be transmitted by using air as a medium, and the air guide channel 190 penetrating through the first housing 120 is arranged in the sound attenuation structure 100, and the through hole 180 is communicated with the first air guide channel 190, so that the noise can be transmitted to the position of the through hole 180 along with the flowing air and transmitted into the cavity 160 of the sound attenuation structure 100 through the through hole 180. The effect of noise elimination on the air circulation path is realized, and the effect of noise elimination of the noise elimination structure 100 is further improved.

In a specific embodiment, the wind eliminating and guiding channel 190 penetrates the first casing 120, so that the first casing 120 is in an annular structure, the first through hole 182 and the second through hole 184 are disposed on the inner annular sidewall of the annular casing, and the first through hole 182 and the second through hole 184 are disposed opposite to each other, so that both the first through hole 182 and the second through hole 184 are communicated with the wind guiding channel 190, and the wind eliminating and guiding channel 190 is suitable for a scene where the wind guiding channel 190 is opposite to a noise source. With the first through hole 182 as a starting point and the second through hole 184 as an end point, noise is transmitted along the plurality of muffling cavities, the transmission path of the noise includes two paths, and the two paths have the same length. The path length of the noise elimination cavity corresponding to the noise frequency is reduced, so that the noise can be quickly transmitted to the corresponding noise elimination cavity, and the noise elimination effect of the noise elimination structure 100 is improved.

In another embodiment, either one of the first through hole 182 and the second through hole 184 is communicated with the air guide passage 190, and the other one is not communicated with the air guide passage 190. The noise elimination structure 100 can simultaneously eliminate the noise transmitted through the air guide channel 190 and the noise not transmitted through the air guide channel 190, and is suitable for a scene where a noise source is large and cannot be completely opposite to the air guide channel 190.

In any of the above embodiments, the first housing 120 includes: a first sub-housing 122 and a second sub-housing 124, the first sub-housing 122 being detachably connected to the second sub-housing 124.

In this embodiment, the first housing 120 includes a first sub-housing 122 and a second sub-housing 124. The first housing 120 is configured by combining a first sub-housing 122 and a second sub-housing 124 to facilitate the fabrication of the structure within the first housing 120. Specifically, it is convenient to provide a plurality of spacers 140 having different shapes and sizes in the first housing 120.

During the use of the sound attenuation structure 100, air may enter the cavity 160 of the first housing 120 through the through hole 180, and as the air enters dust, water, etc., the through hole 180 is easily blocked and the volume inside the cavity 160 is changed. The first sub-housing 122 and the second sub-housing 124 are detachably disposed, so that the first housing 120 can be detached into the first sub-housing 122 and the second sub-housing 124, and the through hole 180 disposed on the first housing 120 and the cavity 160 in the first housing 120 can be cleaned conveniently.

In one embodiment, the through-hole 180 includes a first half-hole and a second half-hole, the first half-hole is disposed on the first sub-housing 122, the second half-hole is disposed on the second sub-housing 124, and the first half-hole and the second half-hole can be combined to form the through-hole 180 after the first sub-housing 122 and the second sub-housing 124 are assembled together. In the using process, if the through hole 180 is blocked, the first half hole and the second half hole are cleaned after the first sub-housing 122 and the second sub-housing 124 are disassembled. Further facilitating cleaning of the through-hole 180 by the user.

In any of the above embodiments, the first housing 120 further comprises: a first connector disposed on the first sub-housing 122, and a second connector disposed on the second sub-housing 124. The first sub-housing 122 and the second sub-housing 124 are detachably connected by a first connector and a second connector.

In this embodiment, the first housing 120 further includes a first connector and a second connector detachably connected. The first connecting piece is arranged on the first sub-housing 122, the second connecting piece is arranged on the second sub-housing 124, and the first housing 120 is quickly disassembled and assembled by disassembling and assembling the first connecting piece and the second connecting piece.

In one embodiment, the first and second connectors are selected to be magnetic attraction structures, and the first and second connectors are disposed on opposite surfaces of the first and

second sub-housings

122 and 124, respectively.

EXAMPLE III

As shown in fig. 3, a third embodiment of the present invention provides a home appliance 200, including: second housing 220, sound attenuating structure 100, and motor 240. The second housing 220 is provided with a receiving cavity, the motor 240 is located in the receiving cavity, the sound attenuation structure 100 is the sound attenuation structure 100 in any of the embodiments, the sound attenuation structure 100 is connected to the second housing 220, and the sound attenuation structure 100 is opposite to the motor 240.

In this embodiment, the household appliance 200 includes a second housing 220, a motor 240 disposed in the second housing 220, and a sound-deadening structure 100 disposed opposite to the motor 240. The motor 240 of the household appliance 200 generates a large noise during the re-operation process, and the noise is filtered by the noise elimination structure 100 after passing through the noise elimination structure 100 arranged opposite to the motor 240, so that the noise of the motor 240 is reduced.

In a specific embodiment, the motor 240 has four different rotating speeds, the motor 240 can generate noise with different frequencies when operating at different rotating speeds, four different muffling cavities are arranged in the muffling structure 100, and the natural frequency of each muffling cavity corresponds to the different rotating speeds of the motor 240, so that the different muffling cavities in the muffling structure 100 can reduce the noise generated by the fan no matter what rotating speed the motor 240 operates at.

As shown in fig. 3 and 4, in any of the above embodiments, the second housing 220 includes: a third sub-housing 222 and a venting structure 224, wherein the venting structure 224 is detachably connected to the third sub-housing 222, and the sound-deadening structure 100 is disposed in the venting structure 224.

In this embodiment, the second housing 220 includes a third sub-housing 222 and a ventilation structure 224, noise generated by the motor 240 can be transmitted using air as a medium, and the ventilation structure 224 is provided in the home appliance 200 to guide the flow of air so that the noise can be leaked out of the home appliance 200 through the ventilation cover 2244. The silencing structure 100 is arranged in the air exhaust structure 224, so that the silencing structure 100 and a noise source are arranged oppositely, and the noise can be transmitted to the position of the through hole 180 along with flowing air and transmitted into the cavity 160 of the silencing structure 100 through the through hole 180. The effect of noise elimination on the air circulation path is realized, and the effect of noise elimination of the noise elimination structure 100 is further improved.

As shown in fig. 4 and 5, the muffling structure 100 includes an air guiding passage 190, and the air exhausting structure 224 includes: third connecting piece 2242, air exhaust find and air exhaust channel 2246. The third connector 2242 is detachably connected to the third sub-housing 222. The exhaust hood 2244 is connected with the third connecting piece 2242, an exhaust channel 2246 is arranged on the exhaust hood 2244, and the exhaust channel 2246 is communicated with the air guide channel 190 of the silencing structure 100.

In this embodiment, the air exhausting structure 224 includes a third connecting member 2242 and an air exhausting cover 2244, the air exhausting passage 2246 is disposed on the air exhausting cover 2244, and the air exhausting passage 2246 is communicated with the air guiding passage 190 in the sound attenuating structure 100, so that noise can be transmitted into the air guiding passage along with flowing air, and then the noise flows through the through hole 180 in the sound attenuating structure 100 and is transmitted into the cavity 160 of the sound attenuating structure 100 through the through hole 180. The effect of noise elimination on the air circulation path is realized, and the effect of noise elimination of the noise elimination structure 100 is further improved.

As shown in fig. 4, in any of the above embodiments, the air guide passage 190 and the air exhaust passage 2246 of the muffling structure 100 are coaxially disposed.

In this embodiment, by arranging the air guide passage 190 and the air exhaust passage 2246 of the sound attenuation structure 100 coaxially, it is ensured that air flowing through the air exhaust passage 2246 can enter the air guide passage 190 in the sound attenuation structure 100, and the effect of removing noise generated by the motor 240 by the sound attenuation structure 100 can be improved.

As shown in fig. 5, in any of the above embodiments, the flow area of the air discharge duct 2246 is equal to or smaller than the flow area of the air guide duct 190 of the muffler structure 100.

In this embodiment, the flow area of the air guide passage 190 of the noise cancellation structure 100 is larger than the flow area of the air discharge passage 2246, so that most of the noise generated by the motor 240 can flow through the air guide passage 190 of the noise cancellation structure 100 and flow into the noise cancellation structure 100, thereby improving the effect of the noise cancellation structure 100 on removing the noise generated by the motor 240.

As shown in fig. 6 and 7, in any of the above embodiments, the air exhausting structure 224 further includes: the limiting member 226 and the limiting member 226 are disposed on the inner sidewall of the exhaust hood 2244, and the limiting member 226 abuts against the muffling structure 100 to limit the limiting member 226 to separate from the exhaust hood 2244.

In this embodiment, the sound-deadening structure 100 is positioned at the position of the inner side wall of the hood 2244 by the stopper 226, so that the sound-deadening structure 100 is prevented from being displaced by the flow of air.

In any of the above embodiments, the household electrical appliance 200 includes a vacuum cleaner, a blender, and a fan.

It is understood that the above choice of home device 200 is not limiting, and home device 200 may be configured in other forms without departing from the spirit and scope of the present application, which is claimed in the appended claims.

In one embodiment, the household appliance 200 is a hand-held vacuum cleaner. The handheld dust collector is provided with four working gears, and each working gear corresponds to different rotating speeds of the fan. The fan can produce the noise of different frequencies with the work of different rotational speeds, sets up four different noise elimination chambeies in noise cancelling structure 100 to correspond the setting with the natural frequency in every noise elimination chamber and the different rotational speeds of fan, realized no matter what kind of work gear down work of dust catcher, the noise that the fan produced can all be reduced to different noise elimination chambeies in noise cancelling structure 100.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sound-deadening structure characterized by comprising:

the first shell is internally provided with a cavity;

the through hole is arranged in the first shell and communicated with the cavity;

a partition arranged in the cavity, the partition dividing the cavity into at least two muffling cavities, the at least two muffling cavities being communicated with each other,

wherein the natural frequencies of any two of the at least two muffling cavities are different.

2. The sound-deadening structure according to claim 1,

the volumes of any two of the at least two muffling cavities are different.

3. The sound-deadening structure according to claim 1,

the number of the spacers is at least two, and the shapes of any two spacers in the at least two spacers are different.

4. The sound attenuation structure according to any one of claims 1 to 3, wherein the through hole includes:

the first through hole is arranged in the first shell and communicated with any one of the at least two silencing cavities;

and the second through hole is arranged in the first shell and communicated with the other silencing cavity in the at least two silencing cavities.

5. The sound-deadening structure according to claim 4,

the first through hole and the second through hole have different flow areas.

6. The sound-attenuating structure according to claim 5, further comprising:

and the air guide channel penetrates through the first shell and is communicated with the first through hole and/or the second through hole.

7. The sound attenuation structure according to any one of claims 1 to 3, wherein the first housing includes:

a first sub-housing;

and the first sub-shell is detachably connected with the second sub-shell.

8. The sound attenuation structure according to claim 7, wherein the first housing further comprises:

the first connecting piece is arranged on the first sub-shell;

and the second connecting piece is arranged on the second sub-shell, and the first sub-shell is detachably connected with the second sub-shell through the first connecting piece and the second connecting piece.

9. An appliance, comprising:

the second shell is provided with an accommodating cavity;

the motor is arranged in the accommodating cavity;

the sound-deadening structure according to any one of claims 1 to 8, connected to the second housing, the sound-deadening structure being disposed opposite to the motor.

10. The home device of claim 9, wherein the second housing comprises:

a third sub-housing;

and the air exhaust structure is detachably connected with the third sub-shell, and the silencing structure is arranged in the air exhaust structure.

11. The household appliance of claim 10, wherein the sound attenuating structure comprises a wind guide channel, and the air exhausting structure comprises:

the third connecting piece is detachably connected with the third sub-shell;

and the exhaust hood is connected with the third connecting piece and is provided with an exhaust channel, and the exhaust channel is communicated with the air guide channel of the silencing structure.

12. The home device of claim 11,

the air exhaust channel and the air guide channel of the noise elimination structure are coaxially arranged.

13. The home device of claim 11,

the flow area of the air exhaust channel is smaller than or equal to that of the air guide channel of the noise elimination structure.

14. The electrical home appliance of claim 11, wherein the air venting structure further comprises:

the locating part, the locating part set up in the inside wall of exhaust hood, the locating part with sound-attenuating structure offsets and leans on, in order to restrict the locating part breaks away from the exhaust hood.

15. The household appliance according to any one of claims 9 to 14,

the household appliance comprises a dust collector, a stirrer and a fan.