CN115182899A

CN115182899A - Volute component, fan and electrical equipment

Info

Publication number: CN115182899A
Application number: CN202210795915.0A
Authority: CN
Inventors: 钟泽; 刘圆圆; 江俊; 李语亭; 章珈彬
Original assignee: Hubei Midea Refrigerator Co Ltd
Current assignee: Hubei Midea Refrigerator Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-14
Also published as: WO2024007626A1

Abstract

The invention provides a volute component, a fan and electrical equipment, wherein the volute component comprises: a first side wall; the peripheral side wall is arranged on one side of the first side wall, and the first side wall and the peripheral side wall form a cavity and an air outlet; the amortization subassembly is located all lateral walls, is located the inside of cavity, and the amortization subassembly includes a plurality of resonant cavities and a plurality of opening, and a resonant cavity and at least one opening are linked together, and the opening is located the one side that the amortization subassembly deviates from all lateral walls. According to the volute component provided by the invention, in the process of the air flow circling in the cavity, the sound wave of wind noise can enter the resonant cavity through the opening and is reflected on the cavity wall of the resonant cavity, so that the energy of the sound wave is consumed, the decibel value of the sound wave is reduced, the noise reduction is realized, and the plurality of resonant cavities can disperse the air flow, reduce the aggregation of the sound wave, and further improve the noise reduction effect.

Description

Volute component, fan and electrical equipment

Technical Field

The invention relates to the technical field of volutes, in particular to a volute component, a fan and electrical equipment.

Background

In the related art, aerodynamic noise is used as a main noise source of the centrifugal fan, and the generation mechanism of the aerodynamic noise is closely related to the flow field inside the volute. Because the rotating speed of a centrifugal fan adopted by most household appliances is not high, the proportion of dipole noise sources is large, and the dipole noise sources are rotation noise generated by periodic pressure pulsation caused by interaction of fan blades, a volute wall surface and ambient air and eddy noise caused by vortex shedding and boundary layer separation. Specifically, as shown in fig. 10, 12, and 14, the dipole noise on the wall surface of the volute 300 is high, the wind speed gradient is large, and the pressure pulsation is large.

Disclosure of Invention

The invention aims to at least solve or improve one of the technical problems of larger noise of the centrifugal fan in the prior art.

To this end, a first aspect of the present invention proposes a volute assembly.

A second aspect of the invention proposes a fan.

A third aspect of the invention proposes an electrical appliance.

In view of the above, according to a first aspect of the present invention, there is provided a volute assembly comprising: a first side wall; the peripheral side wall is arranged on one side of the first side wall, and the first side wall and the peripheral side wall form a cavity and an air outlet; the amortization subassembly is located the inside of cavity, and the amortization subassembly includes a plurality of resonant cavities and a plurality of opening, and a resonant cavity and at least one opening are linked together, and the opening is located the one side that the amortization subassembly deviates from the all lateral walls.

The volute component comprises a first side wall and a peripheral side wall, wherein the peripheral side wall is arranged on one side of the first side wall, a cavity is formed in the peripheral side wall, the fan blade can be installed in the cavity, the peripheral side wall is not in a closed ring shape, and an air outlet is formed in the peripheral side wall, so that after the volute component is assembled into a fan, the fan blade can rotate in the cavity, air is sucked by the air inlet in the first side wall, and then the fan blade is discharged from the air outlet.

Wherein, the inboard at the week lateral wall, that is to say that the week lateral wall is provided with amortization subassembly towards one side of cavity, including resonant cavity and opening in the amortization subassembly, specifically, resonant cavity and open-ended quantity are all a plurality of, and a resonant cavity and at least one opening are linked together, that is to say that resonant cavity and cavity are linked together through the opening, and then the air current at the in-process of circling round in the cavity, the sound wave of wind making an uproar can enter into the resonant cavity through the opening, and reflect on the chamber wall of resonant cavity, thereby consume the energy of sound wave, reduce the decibel value of sound wave, thereby realize making an uproar, and, a plurality of resonant cavities can disperse the air current, reduce the gathering of sound wave, thereby promote the noise reduction effect.

In addition, according to the volute assembly in the above technical solution provided by the present invention, the following additional technical features may also be provided:

on the basis of the technical scheme, further, along the extension direction of the peripheral side wall, the lengths of at least two resonant cavities in the resonant cavities of the plurality of silencing components are different.

In this technical scheme, along the extending direction of week lateral wall, that is to say along the circumference of spiral case subassembly, the length of resonant cavity is different, and then can promote the scope that reduces, specifically, to the noise of different frequencies, can set up the length of different resonant cavities to can widen the use sound wave frequency channel of noise reduction effect, promote noise reduction effect.

On the basis of any technical scheme, further, the lengths of the adjacent resonant cavities are different along the extension direction of the peripheral side wall.

In this technical scheme, along the extending direction of week lateral wall, that is along the circumference of spiral case subassembly, the length of adjacent resonant cavity is different, and adjacent resonant cavity can carry out main falling the noise to the sound wave of different frequencies to further widen the use sound wave frequency channel of noise reduction effect, promote noise reduction effect.

On the basis of any one of the above technical solutions, further, the noise reduction assembly further includes: the inner side wall is arranged on the first side wall and positioned on one side of the peripheral side wall, and the opening is formed in the inner side wall; and the plurality of partition plates are arranged between the peripheral side wall and the inner side wall so as to separate a plurality of resonant cavities.

In this technical scheme, the amortization subassembly includes inside wall and a plurality of baffle, and the inside wall is located the inboard of week lateral wall, and also the inside wall is located the cavity, and a plurality of baffles set up between week lateral wall and inside wall to separate a plurality of resonant cavities, thereby the resonant cavity is located the outside of cavity, and then plays the effect of the amortization that gives sound insulation, suppresses leaking of wind noise, promotes the noise reduction.

And the opening forms on the inside wall, assembles into the fan at the volute subassembly after, and the fan blade rotates in the inboard of inside wall to during wind noise ripples enters into a plurality of resonant cavities through a plurality of openings on the inside wall, thereby the sound wave carries out multiple reflection in the resonant cavity, reduces the energy of sound wave, realizes the noise reduction effect.

The partition plates are arranged along the direction from the peripheral side wall to the inner side wall, namely a plurality of partition plates are arranged at intervals along the circumferential direction of the peripheral side wall, and a plurality of resonant cavities are separated.

Wherein, the inner side wall and the peripheral side wall are positioned on the same side of the first side wall.

On the basis of any one of the above technical solutions, further, the noise reduction assembly further includes: the plurality of baffles are arranged between the peripheral side wall and the inner side wall, at least one baffle is arranged in the resonant cavity, one end of each baffle is connected with one partition, the other end of each baffle is separated from the other partition at intervals, and the baffles separate the resonant cavity into a plurality of sections of resonant channels communicated with each other.

In this technical scheme, the amortization subassembly is still including setting up a plurality of baffles at week lateral wall and inside wall, be provided with at least one baffle in every resonant cavity, the both ends of a resonant cavity are sealed by a baffle respectively, consequently, one end and two baffles of baffle are connected, another looks interval in the other end of baffle and two baffles, thereby separate into bending structure's multistage resonance channel with the resonant cavity, specifically, use a baffle to have a baffle in the resonant cavity as the example and explain, form one section resonance channel between baffle and the inside wall, form one section resonance channel between baffle and the week lateral wall, and, two sections resonance channel are linked together.

And then the sound wave enters into one section resonant channel through the opening, reflects between baffle and inside wall, and later the sound wave reentries into another section resonant channel, and then the sound wave reflects between baffle and week lateral wall to the reflection route of sound wave has been shortened, has increased the reflection number of times of sound wave, promotes noise reduction effect.

On the basis of any one of the above technical solutions, further, the lengths of the resonant channels are the same along the direction from the peripheral side wall to the inner side wall.

In this technical scheme, along the direction of week lateral wall to the inside wall, resonant channel's length is the same, also be in same resonant cavity, along the direction of week lateral wall to the inside wall, and the length of multistage resonant channel is the same to can play the pertinence to fall the noise to the sound wave of a certain frequency, promote the noise reduction effect.

On the basis of any one of the above technical solutions, further, a plurality of baffles are arranged in the resonant cavity, and the plurality of baffles are arranged in the resonant cavity in a staggered manner.

In this technical scheme, if be provided with a plurality of baffles in the resonant cavity, then baffle setting crisscross each other is in the resonant cavity to make multistage resonant channel be snakelike state of bending, thereby prolong a plurality of resonant channel's length, thereby reduced the reflection route of sound wave, increased the reflection number of times of sound wave, promote noise reduction effect.

On the basis of any one of the above technical solutions, further, the inner side wall is in an arc-shaped structure, and the bending direction of the inner side wall is the same as that of the peripheral side wall.

In this technical scheme, the inside wall is arcuation structure to the crooked direction with all the side walls is the same, forms the rectification effect to the air current, promotes the air-out effect of fan.

On the basis of any one of the above technical solutions, further, the baffle is in an arc-shaped structure, and the bending direction of the baffle is the same as that of the peripheral side wall.

In the technical scheme, the baffle is of an arc-shaped structure and is the same as the bending direction of the peripheral side wall, so that the baffle can uniformly separate the resonant cavity.

On the basis of any technical scheme, further, along the one side that the inside wall faced first lateral wall, to the inside wall and deviate from first lateral wall direction, the length of opening is equal with the length of inside wall.

In this technical scheme, along the one side of inside wall orientation first lateral wall, deviate from first lateral wall direction to the inside wall, open-ended length equals with the length of inside wall, and that is the inside wall comprises the structure of multistage, and then promotes the effect that the sound wave got into the resonant cavity, reduces the wind noise that the air current produced through the aperture, promotes the noise reduction effect.

On the basis of any one of the above technical scheme, further, be first distance between week lateral wall and the inside wall, the inside wall is the second distance towards one side of first lateral wall between deviating from first lateral wall to the inside wall, and the value range of the ratio between first distance and the second distance is: 20% to 70%.

In this technical scheme, the distance between week lateral wall and the inside wall is first distance, and the inside wall is towards one side of first lateral wall, deviates from first lateral wall to the inside wall and is the second distance, and the value range that first distance is than the second distance is: 20% to 70% to reduce the volume of the volute assembly.

On the basis of any one of the above technical solutions, further, the length of the baffle is 1mm to 3mm along the direction from the peripheral side wall to the inner side wall.

In the technical scheme, the length of the baffle is 1mm to 3mm along the direction from the peripheral side wall to the inner side wall, so that the baffle has a certain thickness, the baffle can better absorb the energy of sound waves, and the weight of the baffle can also be reduced.

On the basis of any one of the above technical solutions, further, the resonant cavity is a quarter-wave resonant cavity or a helmholtz resonant cavity.

In the technical scheme, the resonant cavity is a quarter-wave resonant cavity or a Helmholtz resonant cavity.

According to a second aspect of the present invention, there is provided a fan comprising: a volute assembly as claimed in any one of the preceding claims.

The fan provided by the invention comprises the volute component provided by any one of the technical schemes, so that the fan has all the beneficial effects of the volute component provided by any one of the technical schemes, and the fan is not stated one by one.

According to a third aspect of the invention, the invention proposes an electrical apparatus comprising: the fan that any one of technical scheme provided.

The electrical equipment provided by the invention comprises the fan provided by any one of the technical schemes, so that all the beneficial effects of the fan provided by any one of the technical schemes are achieved, and the fan is not stated herein.

Additional aspects and advantages of 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 illustrates a schematic structural view of a volute assembly provided by an embodiment of the present invention;

FIG. 2 illustrates a schematic structural view of a volute assembly provided by one embodiment of the present invention;

FIG. 3 illustrates a schematic structural view of a volute assembly provided by one embodiment of the present invention;

FIG. 4 illustratesbase:Sub>A cross-sectional view taken along line A-A of the volute assembly shown in FIG. 3;

FIG. 5 is a schematic diagram illustrating a resonant cavity in the volute assembly according to an embodiment of the present invention;

FIG. 6 illustrates a cross-sectional view in the direction B-B of the volute assembly shown in FIG. 5;

FIG. 7 is a schematic diagram illustrating the structure of a resonant cavity in the volute assembly provided by one embodiment of the present invention;

FIG. 8 illustrates a schematic structural view of a volute assembly provided by one embodiment of the present invention;

FIG. 9 illustrates a cloud of acoustic power distributions on various walls of a volute assembly provided by one embodiment of the present invention;

fig. 10 shows a cloud of sound power distribution on each wall surface on a scroll casing in the related art;

FIG. 11 illustrates a cloud of velocity profiles for a cross-section of a volute assembly provided by an embodiment of the present invention;

fig. 12 shows a speed distribution cloud of a cross section of a scroll in the related art;

FIG. 13 illustrates a cloud of acoustic power distribution of the interior of a volute assembly provided by one embodiment of the present invention;

fig. 14 shows a cloud of acoustic power distribution of the inside of a scroll casing in the related art;

FIG. 15 illustrates a schematic diagram of a frequency spectrum comparison of a volute assembly provided by one embodiment of the present invention and a volute of the related art;

FIG. 16 is a schematic structural diagram of a wind turbine provided in accordance with an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a fan according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 10, 12 and 14 is:

300 a volute;

wherein, the correspondence between the reference numbers and the component names in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 11, fig. 13, fig. 15, fig. 16, and fig. 17 is:

100 volute assembly, 110 first side wall, 120 peripheral side wall, 122 cavity, 124 air outlet, 130 silencing assembly, 132 inner side wall, 134 partition, 136 baffle, 138 resonant cavity, 140 resonant channel, 142 opening, 150 second side wall, 200 fan, 210 shell.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. 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 volute assembly 100 and a fan 200 provided according to some embodiments of the present invention are described below with reference to fig. 1-9, 11, 13, 15, 16, and 17.

As shown in fig. 1, 2, 3, 4 and 8, the present invention provides a volute assembly 100 comprising: first lateral wall 110, all lateral walls 120 and amortization subassembly 130, first lateral wall 110 and all lateral walls 120 enclose a cavity 122 to, be formed with air outlet 124 on all lateral walls 120, be formed with the air intake on first lateral wall 110, and then the mountable fan blade in the cavity 122, the fan blade rotates, inhales from the air intake, exhausts from air outlet 124, perhaps all lateral walls 120 deviate from first lateral wall 110 one side and form the air intake, the fan blade is induced drafts by the air intake.

The volute assembly 100 further includes a sound attenuating assembly 130, the sound attenuating assembly 130 is disposed on the peripheral sidewall 120 and located in the cavity 122, the sound attenuating assembly 130 includes a plurality of resonant cavities 138 therein, each resonant cavity 138 includes at least one opening 142, the opening 142 is disposed on a side of the sound attenuating assembly 130 facing away from the peripheral sidewall 120, that is, the opening 142 communicates the resonant cavity 138 and the cavity 122.

The volute component 100 provided by the invention comprises a first side wall 110 and a peripheral side wall 120, wherein the peripheral side wall 120 is arranged on one side of the first side wall 110, the peripheral side wall 120 forms a cavity 122, a fan blade can be installed in the cavity 122, the peripheral side wall 120 is not in a closed ring shape, and an air outlet 124 is formed in the peripheral side wall 120, so that after the volute component 100 is assembled into a fan 200, the fan blade can rotate in the cavity 122, and is sucked by an air inlet on the first side wall 110 and then is discharged from the air outlet 124.

Wherein, a sound attenuation component 130 is disposed on the inner side of the peripheral sidewall 120, that is, on the side of the peripheral sidewall 120 facing the cavity 122, the sound attenuation component 130 includes a plurality of resonant cavities 138 and openings 142, specifically, the resonant cavities 138 and the openings 142 are provided in plural numbers, and one resonant cavity 138 is communicated with at least one opening 142, that is, the resonant cavity 138 is communicated with the cavity 122 through the opening 142, so that in the process of the airflow circling in the cavity 122, the sound wave of the wind noise can enter the resonant cavity 138 through the opening 142 and is reflected on the cavity wall of the resonant cavity 138, thereby consuming the energy of the sound wave, reducing the decibel value of the sound wave, and realizing noise reduction, and the plurality of resonant cavities 138 can disperse the airflow, reduce the aggregation of the sound wave, and thereby improving the noise reduction effect.

Specifically, the volute assembly 100, includes: the silencer comprises a first side wall 110, a second side wall 150, a peripheral side wall 120 and a silencing assembly 130, wherein a cavity 122 is defined by the first side wall 110, the second side wall 150 and the peripheral side wall 120, the edges of the first side wall 110 and the second side wall 150 are connected with the peripheral side wall 120, an air outlet 124 is formed in the peripheral side wall 120, air inlets are formed in the first side wall 110 and the second side wall 150, and then fan blades can be mounted in the cavity 122, rotate, suck air from the air inlets, and exhaust air from the air outlet 124.

The volute assembly 100 further includes a sound attenuating assembly 130, the sound attenuating assembly 130 is located between the first side wall 110 and the second side wall 150 and is mounted on the peripheral side wall 120, the sound attenuating assembly 130 includes a plurality of resonant cavities 138 therein, each resonant cavity 138 includes at least one opening 142, the opening 142 is disposed on a side of the sound attenuating assembly 130 facing away from the peripheral side wall 120, that is, the opening 142 communicates the resonant cavity 138 and the cavity 122.

The peripheral sidewall 120, the first sidewall 110 and the noise reduction assembly 130 are assembled to form the closed resonant cavity 138, which is not an integral cavity, and is easy to process and low in cost.

In addition, the volute component 100 provided by the invention has no perforated structure, does not influence the air volume and is not easy to generate secondary vortex noise.

As shown in fig. 4, as a possible embodiment of the present invention, further, along the extending direction m of the peripheral sidewall 120, that is, the circumferential direction of the peripheral sidewall 120, the length D of at least two resonant cavities 138 in the plurality of resonant cavities 138 is different from one end of the opening 142 on the peripheral sidewall 120 to the other end of the opening 142.

In this embodiment, along the extending direction m of the peripheral sidewall 120, that is, along the circumferential direction of the volute component 100, the lengths D of the resonant cavities 138 are different, so that the reduction range can be increased, specifically, for noises with different frequencies, the lengths D of the resonant cavities 138 can be set differently, so that the used sound wave frequency band of the noise reduction effect can be widened, and the noise reduction effect can be improved.

For example: the sound attenuating assembly 130 includes five resonant cavities 138, and the five resonant cavities 138 may have two lengths D, three lengths D, four lengths D, or five lengths D.

As shown in fig. 4 and 7, as a possible embodiment of the present invention, further, along the extending direction m of the peripheral sidewall 120, that is, the circumferential direction of the peripheral sidewall 120, the lengths D of the resonant cavities 138 in the adjacent resonant cavities 138 are different from one end of the opening 142 in the peripheral sidewall 120 to the other end of the opening 142.

In this embodiment, along the extending direction m of the peripheral sidewall 120, that is, along the circumferential direction of the volute component 100, the lengths D of the adjacent resonant cavities 138 are different, and the adjacent resonant cavities 138 can perform main noise reduction on sound waves with different frequencies, so as to further widen the used sound wave frequency band of the noise reduction effect and improve the noise reduction effect.

For example: the sound attenuating assembly 130 includes five resonant cavities 138, and five resonant cavities 138 have five lengths D, wherein the lengths D of the five resonant cavities 138 may gradually decrease or increase from one end to the other end.

The lengths D of the resonant cavities 138 are different, and the respective noise elimination frequency bands are coupled with each other, so that the discrete noise of the fan 200 can be reduced in a wider frequency range.

As shown in fig. 2, 3, 4, 5, 6 and 7, as a possible embodiment of the present invention, further, the sound attenuating assembly 130 further includes an inner sidewall 132 and a plurality of partitions 134, the number of the partitions 134 is plural, the inner sidewall 132 is disposed on a side of the peripheral sidewall 120 facing the cavity 122, the inner sidewall 132 is spaced apart from the peripheral sidewall 120, the partitions 134 are disposed between the inner sidewall 132 and the peripheral sidewall 120, one end of the partition 134 is connected to the peripheral sidewall 120, the other end of the partition 134 is connected to the inner sidewall 132, and the plurality of partitions 134 are disposed at intervals along the extending direction m of the peripheral sidewall 120, so as to partition the plurality of resonant cavities 138.

Specifically, there is at least one partition 134 between adjacent resonant cavities 138, such as: with one partition 134 between adjacent cavities 138, two partitions 134 between adjacent cavities 138, or three partitions 134 between adjacent cavities 138, etc.

In this embodiment, the noise reduction assembly 130 includes an inner sidewall 132 and a plurality of partitions 134, the inner sidewall 132 is located inside the peripheral sidewall 120, that is, the inner sidewall 132 is located in the cavity 122, and the partitions 134 are disposed between the peripheral sidewall 120 and the inner sidewall 132 to partition the resonant cavities 138, so that the resonant cavities 138 are located at the outermost side of the cavity 122, thereby playing a role of sound insulation and noise reduction, suppressing the leakage of wind noise, and enhancing the noise reduction effect.

Moreover, the openings 142 are formed on the inner side wall 132, and after the volute assembly 100 is assembled into the fan 200, the fan blades rotate on the inner side of the inner side wall 132, so that wind noise waves enter the plurality of resonant cavities 138 through the plurality of openings 142 on the inner side wall 132, and the sound waves are reflected in the resonant cavities 138 for multiple times, so that the energy of the sound waves is reduced, and the noise reduction effect is realized.

The partition 134 is disposed along the direction from the peripheral sidewall 120 to the inner sidewall 132, that is, the plurality of partitions 134 are disposed along the circumference of the peripheral sidewall 120 at intervals, and partition the plurality of resonant cavities 138.

Wherein the inner sidewall 132 and the peripheral sidewall 120 are located on the same side of the first sidewall 110, specifically, the inner sidewall 132 and the outer sidewall are sandwiched between the first sidewall 110 and the second sidewall 150.

Specifically, the inner sidewall 132 and the plurality of partitions 134 are sandwiched between the first sidewall 110 and the second sidewall 150, the inner sidewall 132 is located inside the peripheral sidewall 120, that is, the inner sidewall 132 is located in the cavity 122, and the plurality of partitions 134 are disposed between the peripheral sidewall 120 and the inner sidewall 132, so as to partition the plurality of resonant cavities 138, so that the resonant cavities 138 are located at the outermost sides of the cavity 122, thereby playing a role of sound insulation and sound attenuation, suppressing the leakage of wind noise, and improving the noise reduction effect.

Wherein the opening 142 of the resonant cavity 138 is disposed near the partition 134, thereby increasing the formation of sound wave reflection and enhancing the noise reduction effect, specifically, the resonant cavity 138 has one opening 142, and the opening 142 is near one of the two partitions 134. The openings 142 of the plurality of resonant cavities 138 are all disposed at the same end location of the resonant cavities 138.

As shown in fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, as a possible embodiment of the present invention, further, the sound attenuation module 130 further includes a plurality of baffles 136 disposed between the peripheral sidewall 120 and the inner sidewall 132, wherein at least one baffle 136 is disposed in each resonant cavity 138, the baffle 136 is sandwiched between the first sidewall 110 and the second sidewall 150, two opposite ends of one resonant cavity 138 respectively have a partition 134, one end of the baffle 136 is connected to one of the two partitions 134, and the other end of the baffle 136 is spaced from the other of the two partitions 134, so as to divide the resonant cavity 138 into a plurality of resonant passages 140, and the plurality of resonant passages 140 are connected.

In this embodiment, the sound attenuating assembly 130 further includes a plurality of baffles 136 disposed on the peripheral sidewall 120 and the inner sidewall 132, at least one baffle 136 is disposed in each resonant cavity 138, and both ends of one resonant cavity 138 are respectively sealed by one partition 134, so that one end of the baffle 136 is connected to one of the two partitions 134, and the other end of the baffle 136 is spaced apart from the other of the two partitions 134, thereby dividing the resonant cavity 138 into a plurality of resonant passages 140 of a bent structure, specifically, as illustrated by an example in which one baffle 136 is disposed in one resonant cavity 138, one resonant passage 140 is formed between the baffle 136 and the inner sidewall 132, one resonant passage 140 is formed between the baffle 136 and the peripheral sidewall 120, and the two resonant passages 140 are communicated. The multiple sections of resonant channels 140 are arranged alternately to form a coiled channel.

And then the sound wave enters one section of resonant channel 140 through opening 142, reflects between baffle 136 and inside wall 132, and then the sound wave enters another section of resonant channel 140 again, and then the sound wave reflects between baffle 136 and surrounding lateral wall 120 to the reflection route of sound wave has been reduced, has increased the reflection number of times of sound wave, has promoted noise reduction effect.

Specifically, for example, two baffles 136 are disposed in one resonant cavity 138, wherein the two baffles 136 are distributed along a direction from the opening 142 to the opening 142, the one baffle 136 near the opening 142 is connected to the partition 134 near the opening 142, the one partition 134 far from the opening 142 is connected to the other partition 134, so as to form a three-section resonant channel 140, the three sections of resonant channel 140 are sequentially connected end to end, so as to extend the length of the reflection channel of the acoustic wave, and the three-section resonant channel 140 formed from the peripheral sidewall 120 to the inner sidewall 132 has a certain reduced capability of the acoustic wave in the outermost resonant channel 140, so as to further improve the noise reduction effect.

Wherein the lengths of the plurality of resonant cavities 138 are different based on the circumferential direction along the circumferential sidewall 120, and therefore, the lengths of the baffles 136 in different resonant cavities 138 are also different.

As shown in fig. 5 and 6, as one possible embodiment of the present invention, further, the lengths of the plurality of resonance channels 140 are the same along the direction from the peripheral sidewall 120 to the inner sidewall 132.

In this embodiment, the lengths of the resonant channels 140 are the same along the direction from the peripheral sidewall 120 to the inner sidewall 132, that is, the lengths of the multiple sections of resonant channels 140 are the same along the direction from the peripheral sidewall 120 to the inner sidewall 132 in the same resonant cavity 138, so that the targeted noise reduction can be performed on the sound wave of a certain frequency, and the noise reduction effect is improved.

Specifically, for example, two baffles 136 are disposed in one resonant cavity 138, wherein the two baffles 136 are distributed along a direction from the opening 142 to the opening 142, one baffle 136 close to the opening 142 is connected to the partition 134 close to the opening 142, and one partition 134 far from the opening 142 is connected to the other partition 134, so as to form a three-segment resonant channel 140, and the three segments of resonant channels 140 are sequentially communicated end to end, thereby extending the length of the reflection channel of the acoustic wave. Wherein, the distance between the inner sidewall 132 and the baffle 136 close to the inner sidewall 132 is w1, the distance between the baffle 136 close to the inner sidewall 132 and the baffle 136 far from the inner sidewall 132 is w2, the distance between the baffle 136 far from the inner sidewall 132 and the circumferential sidewall 120 is w3, and w1= w2= w3.

As shown in fig. 2, 4 and 5, as a possible embodiment of the present invention, further, a plurality of baffles 136 are disposed in a resonant cavity 138, the plurality of baffles 136 are distributed in a direction from the peripheral sidewall 120 to the inner sidewall 132 at intervals, and the plurality of baffles 136 are alternately disposed in the resonant cavity 138.

In this embodiment, if the resonant cavity 138 is provided with a plurality of baffles 136, the baffles 136 are alternately arranged in the resonant cavity 138, so that the plurality of sections of resonant channels 140 are bent in a serpentine shape, and the lengths of the plurality of resonant channels 140 are extended, thereby shortening the reflection path of the acoustic wave, increasing the reflection times of the acoustic wave, and improving the noise reduction effect.

Specifically, for example, two baffles 136 are disposed in one resonant cavity 138, where the two baffles 136 are distributed along a direction from an opening 142 to a position far away from the opening 142, the baffle 136 close to the opening 142 is connected to the partition 134 close to the opening 142, the partition 134 far from the opening 142 is connected to the partition 134, so as to form a three-segment resonant channel 140, the three segments of resonant channel 140 are sequentially communicated end to end, so that the three resonant channels 140 are in a bent state, and a serpentine structure is formed, thereby extending the length of the reflection channel of the acoustic wave.

Resonant channel 140 is the space coiling formula, can guarantee under the condition that occupies less structure space, prolongs resonant channel 140's coiling length, reduces resonant cavity 138's resonant frequency to realize the effect of low frequency noise elimination, wherein, can make full use of three-dimensional space on the one hand, structural feature size is little, noise elimination frequency is low and the frequency bandwidth, and on the other hand the sound wave makes a round trip to reflect at the resonant channel 140 who coils, realizes the dissipation effect of reinforcing sound energy.

As shown in fig. 1, 2, 4 and 7, as a possible embodiment of the present invention, the peripheral sidewall 120 is further in an arc-shaped structure, and the inner sidewall 132 is in an arc-shaped structure, and the bending direction of the peripheral sidewall 120 is the same.

In this embodiment, the inner sidewall 132 is an arc-shaped structure and has the same bending direction as the peripheral sidewall 120, so as to form a rectification effect on the airflow and improve the air outlet effect of the fan 200.

Specifically, the inside wall 132 is as the water conservancy diversion part to the air current, consequently, sets up inside wall 132 and is the curved structure, can promote worm wheel assembly's air-out effect.

Specifically, the inner sidewall 132 has a circular arc-shaped configuration.

As shown in fig. 1, 2, 4 and 7, as a possible embodiment of the present invention, the peripheral side wall 120 is further formed in an arc-like structure, and the baffle 136 is formed in an arc-like structure, and the bending direction of the peripheral side wall 120 is the same.

In this embodiment, the baffle 136 is of an arc-like configuration and is curved in the same direction as the peripheral sidewall 120, so that the baffle 136 uniformly divides the resonant cavity 138.

Specifically, the peripheral side wall 120 has an arc structure, the inner side wall 132 has an arc structure, the baffle 136 has an arc structure, and the inner side wall 132 and the baffle 136 are bent in the same direction as the peripheral side wall 120. Therefore, the whole width of the resonant channel 140 is uniform, namely w1, w2 and w3 are more uniform, and the noise reduction effect is improved.

Specifically, the baffle 136 has a circular arc-shaped configuration.

As a possible embodiment of the present invention, further, the length of the opening 142 and the length of the inner sidewall 132 are equal along the side of the inner sidewall 132 facing the first sidewall 110 to the direction of the inner sidewall 132 away from the first sidewall 110, that is, along the direction of the first sidewall 110 to the second sidewall 150.

In this embodiment, along the inner sidewall 132 towards one side of the first sidewall 110, to the direction of the inner sidewall 132 away from the first sidewall 110, that is, along the direction from the first sidewall 110 to the second sidewall 150, the length of the opening 142 is equal to the length of the inner sidewall 132, that is, the inner sidewall 132 is composed of a multi-segment structure, so as to improve the effect of sound waves entering the resonant cavity 138, reduce the wind noise generated by the air flow through the small holes, and improve the noise reduction effect.

As shown in fig. 6, as a possible embodiment of the present invention, further, a first distance y is between the peripheral sidewall 120 and the inner sidewall 132, a side of the inner sidewall 132 facing the first sidewall 110, a distance from a side of the inner sidewall 132 facing away from the first sidewall 110 is a second distance x, and a ratio between the first distance y and the second distance x has a range: 20% to 70%.

In this embodiment, the distance between the peripheral sidewall 120 and the inner sidewall 132 is a first distance y, the side of the inner sidewall 132 facing the first sidewall 110 is a second distance x to the side of the inner sidewall 132 facing away from the first sidewall 110, and the first distance y is in the range of 20% to 70% greater than the second distance x, i.e., y ÷ x, thereby reducing the volume of the volute assembly 100.

Specifically, y ÷ x =20%, or y ÷ x =30%, or y ÷ x =40%, or y ÷ x =50%, or y ÷ x =60%, or y ÷ x =70%, and so forth.

As shown in fig. 6, as a possible embodiment of the present invention, further, the length c of the baffle 136 is 1mm to 3mm along the direction from the peripheral sidewall 120 to the inner sidewall 132.

In this embodiment, the length c of the baffle 136 is 1mm to 3mm along the direction from the peripheral sidewall 120 to the inner sidewall 132, so that the baffle 136 has a certain thickness, the baffle 136 can better absorb the energy of the sound wave, and the weight of the baffle 136 can be reduced.

Specifically, c =1mm, or c =2mm, or c =3mm.

Further, as a possible embodiment of the present invention, the resonant cavity 138 employs a quarter-wave resonant cavity 138.

As a possible embodiment of the present invention, the resonant cavity 138 further adopts a helmholtz resonant cavity 138.

As shown in fig. 1 to 8, the present invention provides a volute assembly 100 comprising a first side wall 110, a peripheral side wall 120 and a sound attenuation assembly 130, specifically, the peripheral side wall 120 and the sound attenuation assembly 130 have a length of 52mm from an end close to the first side wall 110 to an end far from the first side wall 110, the wall thickness of the peripheral side wall 120 is 2mm, and further, the thicknesses of the inner side wall 132, the partition 134 and the baffle 136 are all 2mm.

The sound attenuation component 130 includes five resonant cavities 138, and the lengths of the five resonant cavities 138 are arranged from clockwise to clockwise, along the circumferential direction m of the peripheral sidewall 120, where the length of the first resonant cavity 138 is 377.5mm, the length of the second resonant cavity 138 is 308.2mm, the length of the third resonant cavity 138 is 260.3mm, the length of the fourth resonant cavity 138 is 225.0mm, the length of the fifth resonant cavity 138 is 198.2mm, each resonant cavity 138 includes two baffles 136 to form three resonant channels 140, the widths w1, w2, and w3 of the resonant channels 140 are all 5mm, and the height of the resonant channels 140, that is, the length from the end close to the first sidewall 110 to the end far from the first sidewall 110 of the peripheral sidewall 120 and the sound attenuation component 130 is 52mm.

The volute assembly 100 provided by the invention is compared with the volute 300 in the related art through experiments, and the volute 300 in the related art is not provided with a sound attenuation assembly, as shown in fig. 9 and 10, the dipole noise on the wall surface of the volute assembly 100 provided by the invention is obviously lower than the noise on the wall surface of the volute 300 in the related art.

As shown in fig. 11 and 12, the wind speed gradient in the cavity 122 of the volute assembly 100 provided by the present invention is significantly lower than the wind speed gradient in the volute 300 in the related art, and the air output of the air outlet 124 of the volute assembly 100 provided by the present invention is significantly greater than the air output of the volute 300 in the related art.

As shown in fig. 13 and 14, the pressure pulsations within the cavity 122 of the volute assembly 100 provided by the present invention are reduced because the wind speed gradient within the cavity 122 of the volute assembly 100 provided by the present invention is significantly lower than the wind speed gradient within the volute 300 of the related art.

As shown in fig. 15, a spectrogram of an external sound field of the volute assembly 100 provided by the present invention and the volute 300 in the related art is shown, wherein in a frequency band of 0-1000Hz, an RMS (root mean square) value of the volute assembly 100 provided by the present invention is 38.27dB, an RMS value of the volute 300 in the related art is 41.37dB, and noise is reduced by 3.1dB as a whole.

That is, the volute component 100 provided by the invention better controls the discrete noise generated by the fan 200 in the fan blade rotation process in the frequency band of 0-1000Hz, so as to achieve the low-frequency noise elimination effect, which is mainly because the frequency band corresponds to the noise elimination frequency band of the noise elimination component 130 of the volute component 100 provided by the invention, and the impedance mismatch is caused by the section change of the opening 142 of the noise elimination component 130, so that the sound wave excited by the fan 200 enters the noise elimination cavity of the noise elimination component 130 to generate local resonance dissipation.

The volute component 100 provided by the invention reduces noise in the full frequency band of 0-5000Hz, and achieves the effect of broadband noise elimination, which is caused by frequency doubling noise elimination of the noise elimination component 130, and meanwhile, the noise elimination component 130 can cause the gradient reduction of the fluid speed in the cavity 122 of the volute component 100, and the pressure pulsation is reduced, so that the broadband noise generated by the fan 200 can be improved, the airflow flowing characteristic at the air outlet 124 is improved, the air volume is improved, and the noise reduction is realized without influencing the air volume.

As shown in fig. 16 and 17, the present invention provides a fan 200 including: the volute assembly 100 as provided in any of the embodiments.

The blower 200 provided by the present invention includes the volute assembly 100 provided in any embodiment, and therefore, all the advantages of the volute assembly 100 provided in any embodiment are provided, which is not stated herein.

Specifically, the blower 200 also includes a housing 210, with the volute assembly 100 disposed inside the housing 210.

The present invention provides an electric appliance, including: the fan 200 as provided in any of the embodiments.

The electrical equipment provided by the invention comprises the fan 200 provided by any embodiment, so that all the beneficial effects of the fan 200 provided by any embodiment are achieved, and no description is given here.

The electrical equipment comprises air conditioners, refrigerators and other equipment.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless explicitly 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced components or units must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, 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 volute assembly, comprising:

a first side wall;

the peripheral side wall is arranged on one side of the first side wall, and the first side wall and the peripheral side wall form a cavity and an air outlet;

the noise reduction assembly is arranged on the peripheral side wall and located inside the cavity, the noise reduction assembly comprises a plurality of resonant cavities and a plurality of openings, one resonant cavity is communicated with at least one opening, and the opening is located on one side, deviating from the peripheral side wall, of the noise reduction assembly.

2. The volute assembly of claim 1,

at least two of the resonant cavities of the plurality of sound attenuating elements have different lengths along the extending direction of the peripheral side wall.

3. The volute assembly of claim 2,

the lengths of the adjacent resonant cavities are different along the extension direction of the peripheral side wall.

4. The volute assembly of any of claims 1-3, wherein the sound attenuation assembly further comprises:

the inner side wall is arranged on the first side wall and positioned on one side of the peripheral side wall, and the opening is formed in the inner side wall;

and the plurality of partition plates are arranged between the peripheral side wall and the inner side wall so as to separate a plurality of resonant cavities.

5. The volute assembly of claim 4, wherein the sound attenuation assembly further comprises:

the plurality of baffles are arranged between the peripheral side wall and the inner side wall, at least one baffle is arranged in the resonant cavity, one end of each baffle is connected with one partition, the other end of each baffle is spaced from the other partition, and the resonant cavity is divided into a plurality of sections of resonant channels which are communicated with each other by the baffles.

6. The volute assembly of claim 5,

the length of the resonant channel is the same along the direction from the peripheral side wall to the inner side wall.

7. The volute assembly of claim 6,

the resonant cavity is internally provided with a plurality of baffles which are arranged in the resonant cavity in a staggered manner.

8. The volute assembly of claim 4,

the inner side wall is of an arc-shaped structure and is the same as the bending direction of the peripheral side wall.

9. The volute assembly of claim 5,

the baffle is of an arc-shaped structure and has the same bending direction with the peripheral side wall.

10. The volute assembly of claim 4,

the length of the opening is equal to that of the inner side wall along one side of the inner side wall facing the first side wall and in the direction of the inner side wall deviating from the first side wall.

11. The volute assembly of claim 4,

the all side walls with be first distance between the inside wall, the inside wall orientation one side of first lateral wall, it arrives the inside wall deviates from be the second distance between the first lateral wall, the value range of the ratio between first distance and the second distance is: 20% to 70%.

12. The volute assembly of claim 5,

the length of the baffle plate is 1mm to 3mm along the direction from the peripheral side wall to the inner side wall.

13. The volute assembly of any of claims 1 to 3,

the resonant cavity is a quarter-wave resonant cavity or a Helmholtz resonant cavity.

14. A fan, comprising:

a volute assembly according to any of claims 1 to 13.

15. An electrical device, comprising:

the blower of claim 14.