CN203810689U - Low frequency sound noise reduction structure and cabinet air conditioner with structure - Google Patents
Low frequency sound noise reduction structure and cabinet air conditioner with structure Download PDFInfo
- Publication number
- CN203810689U CN203810689U CN201320808963.5U CN201320808963U CN203810689U CN 203810689 U CN203810689 U CN 203810689U CN 201320808963 U CN201320808963 U CN 201320808963U CN 203810689 U CN203810689 U CN 203810689U
- Authority
- CN
- China
- Prior art keywords
- plate body
- denoising structure
- bottom sound
- closed cavity
- sound denoising
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000009467 reduction Effects 0.000 title abstract description 6
- 230000003584 silencer Effects 0.000 claims abstract description 12
- 239000011358 absorbing material Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000030279 gene silencing Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 238000004378 air conditioning Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
Abstract
The utility model provides a low frequency sound noise reduction structure. The structure is a closed cavity, wherein the inner cavity of the closed cavity is formed by rotating a rotating line around a center axis, the closed cavity comprises a plate body and a rotation wall, the section area of the rotation wall in a direction parallel to the plate body is gradually reduced from the plate body to a direction away from the plate body or is equal, the rotation wall is provided with a plurality of openings, and the closed cavity and the openings form a Helmholtz silencer. The utility model also provides a cabinet air conditioner comprising a shell, an air duct system and the low frequency sound noise reduction structure, wherein the air duct system comprises a volute and a wind wheel. The low frequency sound noise reduction structure provided by the utility model integrates the functions of rectification and Helmholtz silencing, uniform transition, from the wind wheel to an air outlet, of the section of an air duct is realized by the external shape of the structure, and turbulence is decreased; the structure is internally hollow, and the Helmholtz silencer is designed by trepanning the shell, so the low frequency rotating noise of the wind wheel can be reduced; by combining the two measures, the noise in the frequency band range of 160-240Hz is effectively reduced by 3dB(A).
Description
Technical field
The utility model belongs to air-conditioning technical field, relates in particular to a kind of all-bottom sound denoising structure and has the cabinet air-conditioner of this structure.
Background technology
Indoor apparatus of air conditioner noise is the principal element that affects consumer's worry degree.In the time that noise of indoor unit is more brisk, consumer only experiences purer sound of the wind, there is no uncomfortable sensation; If while there is overcast skirr in noise of indoor unit, the sound quality variation of air-conditioning, consumer is easily tired and irritated under this obvious low-frequency noise environment.
Current, air conditioner industry mainly concentrates on noise total value noise reduction direction to the research of indoor machine noise, motor abnormal sound direction and the blower fan direction such as utter long and high-pitched sounds.A lot of patent documentations adopt micropunch silencer, machine noise in even auxiliary employing sound-absorbing material reduces with expectation.The layout of tiny hole noise silencer in cabinet-type air conditioner is usually placed in the top of cabinet-type air conditioner under actual conditions, if be arranged in around air-conditioning wall, can increase undoubtedly air-conditioning length and width size.Chinese patent literature CN201210138444.2 has reasonably utilized cabinet-type air conditioner headroom just, on the basis of not changing cabinet-type air conditioner size, design silencer, reduced cabinet-type air conditioner noise, but the position of this silencer has limitation, cannot improve the all-bottom sound being sent by air-conditioning cavity.In indoor machine, increase sound-absorbing material and can reduce air-conditioning noise, but sound-absorbing material generally has water imbibition, long-term use may cause damp mildew, and then affects sound absorbing capabilities; Simultaneously sound-absorbing material mainly has good noise reduction for the noise of medium-high frequency section, for all-bottom sound without obvious effect.
Due to the specific fan air channel structure of cylindric cabinet-type air conditioner, produce obvious skirr at cabinet-type air conditioner middle part, adopt above-mentioned sound absorption, noise countermeasure can not meet the requirement that improves bass quality.
Utility model content
The purpose of this utility model is to provide a kind of all-bottom sound denoising structure, is intended to solve the air channel air-flow appearance turbulent flow and the problem of sending low-frequency noise of cylindric cabinet-type air conditioner inside.
The utility model is to realize like this, a kind of all-bottom sound denoising structure, described all-bottom sound denoising structure is the closed cavity of the inner chamber that rotates to form around a central shaft of a rotational line, described closed cavity comprises that plate body and the outer rim by described plate body stretch out and encloses the turret wall of described inner chamber with described plate body, described turret wall is reduced gradually or equates to the direction away from described plate body by described plate body at the area of section being parallel in described plate body direction, on described turret wall, offer some openings, described closed cavity and described opening form Helmholtz silencer.
Further, described turret wall be shaped as conical, cylindrical, hemispherical or elliposoidal.
Further, the combination that is shaped as conical, cylindrical, hemispherical or elliposoidal of described turret wall.
Further, described opening is through hole.
Further, described opening is bar shaped seam.
Further, described opening is uniformly distributed on described turret wall along described central shaft.
Further, the inner side of described closed cavity is provided with sound-absorbing material.
Further, described all-bottom sound denoising structure is working of plastics or foam element.
Another object of the present utility model is to provide a kind of cabinet air-conditioner, it comprises housing and is arranged at the ducting system of the inside of described housing, the top of described housing and bottom offer respectively air outlet and air inlet, described ducting system comprises the spiral case of the inside of being fixed on described housing and is arranged at the wind wheel of the inside of described spiral case, described cabinet air-conditioner is cylindrical or near cylindrical, described cabinet air-conditioner also comprises all-bottom sound denoising structure, and described all-bottom sound denoising structure is installed on the top of described wind wheel.
Further, the described plate body of described turret wall distance of described all-bottom sound denoising structure position and described air outlet is farthest close.
The utility model with respect to the technique effect of prior art is: the all-bottom sound denoising structure that the utility model provides is the closed cavity of the inner chamber that rotates to form around a central shaft of a rotational line, and closed cavity comprises that plate body and the outer rim by plate body stretch out and encloses the turret wall of inner chamber with plate body.Turret wall is reduced gradually or equates to the direction away from plate body by plate body at the area of section being parallel in plate body direction, all-bottom sound denoising structure is arranged to the wind wheel upside of cabinet air-conditioner inside, the shape of this closed cavity mainly plays rectified action to the fluid of inside, air channel, can make runner interface smooth variation, avoid sudden change, reduce the turbulent flow of wind wheel top.On turret wall, offer some openings, closed cavity and opening form Helmholtz silencer, reduce the low frequency rotating noise of fan.The all-bottom sound denoising structure that the utility model provides can reduce the low frequency skirr of cylindric cabinet-type air conditioner, improve sound quality, low-frequency noise in 160Hz～240Hz frequency band range reduces 3dB (A), and simple in structure being easy to realize, and while adopting foam element, processing cost is lower.
Brief description of the drawings
Fig. 1 is the stereogram of the all-bottom sound denoising structure that provides of the utility model embodiment.
Fig. 2 is the cutaway view of the all-bottom sound denoising structure of Fig. 1.
Fig. 3 is the exploded view of the cabinet air-conditioner that provides of the utility model embodiment, and wherein all-bottom sound denoising structure is not installed.
Fig. 4 is the exploded view of the cabinet air-conditioner of Fig. 3, and wherein all-bottom sound denoising structure is installed.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 2, a kind of all-bottom sound denoising structure 10 that the utility model embodiment provides, described all-bottom sound denoising structure 10 is the closed cavity 11 of the interior sky that rotates to form around a central shaft m of a rotational line, and described closed cavity 11 comprises that plate body 11a and the outer rim by described plate body 11a stretch out and encloses the turret wall 11b of described inner chamber with described plate body 11a.
Described turret wall 11b is reduced gradually or equates to the direction away from described plate body 11a by described plate body 11a at the area of section being parallel in described plate body 11a direction.All-bottom sound denoising structure 10 is arranged to the upside of the wind wheel 32 of cabinet air-conditioner inside, the shape of this closed cavity 11 mainly plays rectified action to the fluid of inside, air channel, can make runner interface smooth variation, avoids sudden change, the turbulent flow that reduces wind wheel 32 tops, reaches rectification effect.
On described turret wall 11b, offer some openings 12, described closed cavity 11 forms Helmholtz silencer with described opening 12.Air-flow is flowing to through side in the process of end face, pneumatic noise is through opening 12, because acoustic impedance changes, most of sound wave energy can reflect back, and some acoustic energy can enter closed cavity 11 inside, and now opening 12 forms resonant cavity with closed cavity 11, according to Helmholtz resonance principle, acoustic energy reaches maximum consumption, and only remaining sub-fraction acoustic energy continues to propagate to end face, thereby reduces the noise of gas-flow radiation.Do not changing under the prerequisite of cylindric cabinet-type air conditioner external dimensions, can reduce the low frequency skirr of cylindric cabinet-type air conditioner, improving sound quality, the low-frequency noise in 160Hz～240Hz frequency band range reduces 3dB (A), reaches Helmholtz soundproof effect.
The utility model with respect to the technique effect of prior art is: the all-bottom sound denoising structure 10 that the utility model provides is the closed cavity 11 of the inner chamber that rotates to form around a central shaft m of a rotational line, and closed cavity 11 comprises that plate body 11a and the outer rim by plate body 11a stretch out and encloses the turret wall 11b of inner chamber with plate body 11a.Turret wall 11b is reduced gradually or equates to the direction away from plate body 11a by plate body 11a at the area of section being parallel in plate body 11a direction, all-bottom sound denoising structure 10 is arranged to wind wheel 32 upsides of cabinet air-conditioner inside, the shape of this closed cavity 11 mainly plays rectified action to the fluid of inside, air channel, can make runner interface smooth variation, avoid sudden change, reduce the turbulent flow of wind wheel 32 tops.On turret wall 11b, offer some openings 12, closed cavity 11 forms Helmholtz silencer with opening 12, reduces the low frequency rotating noise of fan.The all-bottom sound denoising structure 10 that the utility model provides can reduce the low frequency skirr of cylindric cabinet-type air conditioner, improve sound quality, low-frequency noise in 160Hz～240Hz frequency band range reduces 3dB (A), and simple in structure being easy to realize, and while adopting foam element, processing cost is lower.
Further, being shaped as of described turret wall 11b is conical, cylindrical, hemispherical or elliposoidal, need to ensure that described turret wall 11b is reduced gradually or equates to the direction away from described plate body 11a by described plate body 11a at the area of section being parallel in described plate body 11a direction, reaches rectification effect.
In the present embodiment, described closed cavity 11 be shaped as taper shape.Understandably, described closed cavity 11 be shaped as cylindrical, hemispherical or elliposoidal.
Understandably, described closed cavity 11 is the combination of conical, cylindrical, hemispherical or elliposoidal, can adopt one, two or more shapes in taper shape, cylindrical, hemispherical or elliposoidal to be combined to form composite figure, need to ensure that described turret wall 11b is reduced gradually or equates to the direction away from described plate body 11a by described plate body 11a at the area of section being parallel in described plate body 11a direction, reaches rectification effect.
Further, described opening 12 is through hole, and opening 12 forms resonant cavity with closed cavity 11, reaches Helmholtz soundproof effect.
Understandably, described opening 12 is bar shaped seam, and opening 12 forms resonant cavity with closed cavity 11, reaches Helmholtz soundproof effect.
Further, described opening 12 is uniformly distributed on described closed cavity 11 along described central shaft m, and this structure is conducive to Helmholtz noise elimination effect.
Further, the inner side of described closed cavity 11 is provided with sound-absorbing material, and sound-absorbing material can further reduce noise.
Further, described all-bottom sound denoising structure 10 is working of plastics or foam element, and while adopting foam element, processing cost is lower.
Refer to Fig. 3, Fig. 4, a kind of cabinet air-conditioner that the utility model embodiment provides, it comprises housing 20 and is arranged at the ducting system 30 of the inside of described housing 20, the top of described housing 20 and bottom offer respectively air outlet 21a and air inlet 22a, and described ducting system 30 comprises the spiral case 31 of the inside of being fixed on described housing 20 and is arranged at the wind wheel 32 of the inside of described spiral case 31.Described cabinet air-conditioner is cylindrical or near cylindrical, and described cabinet air-conditioner also comprises all-bottom sound denoising structure 10, and described all-bottom sound denoising structure 10 is mechanically connected to the top of described wind wheel 21.The rear board 22 that housing 20 comprises front panel 21 and is connected with described front panel 21, air inlet 22a is opened in front panel 21, and air outlet 21a is opened in rear board 22.Between air inlet 22a and ducting system 30, form wind inlet channel, between ducting system 30 and air outlet 21a, form air-out air channel.Wind wheel 32 rotates, and forms air low-pressure area at air inlet 22a, and original air enters inner axial flow and the radial air flow of also producing therein of cabinet air-conditioner from air inlet 22a.Form air higher-pressure region at air outlet 21a, fresh air is sent cabinet air-conditioner from air outlet 21a.
Before installation all-bottom sound denoising structure 10, air-flow, after wind wheel 32, due to the sudden change of cross section of fluid channel, forms turbulent flow above wind wheel 32, and noise increases.Installing after all-bottom sound denoising structure 10, all-bottom sound denoising structure 10 is realized air-out duct cross-section smooth change, makes air-flow smooth flow in air-out air channel, and forms Helmholtz silencer, can eliminate the speed noise of wind wheel 32.
Further, the described plate body 11a of described turret wall 11b distance of described all-bottom sound denoising structure 10 position and described air outlet 21a is farthest close, allows the rectified action of all-bottom sound denoising structure 10 and noise elimination effect reach maximum.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. an all-bottom sound denoising structure, it is characterized in that: described all-bottom sound denoising structure is the closed cavity of the inner chamber that rotates to form around a central shaft of a rotational line, described closed cavity comprises that plate body and the outer rim by described plate body stretch out and encloses the turret wall of described inner chamber with described plate body, described turret wall is reduced gradually or equates to the direction away from described plate body by described plate body at the area of section being parallel in described plate body direction, on described turret wall, offer some openings, described closed cavity and described opening form Helmholtz silencer.
2. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: being shaped as of described turret wall is conical, cylindrical, hemispherical or elliposoidal.
3. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: being shaped as of described turret wall is conical, cylindrical, the combination of hemispherical or elliposoidal.
4. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: described opening is through hole.
5. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: described opening is bar shaped seam.
6. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: described opening is uniformly distributed on described turret wall along described central shaft.
7. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: the inner side of described closed cavity is provided with sound-absorbing material.
8. all-bottom sound denoising structure as claimed in claim 1, is characterized in that: described all-bottom sound denoising structure is working of plastics or foam element.
9. a cabinet air-conditioner, it comprises housing and is arranged at the ducting system of the inside of described housing, the top of described housing and bottom offer respectively air outlet and air inlet, described ducting system comprises the spiral case of the inside of being fixed on described housing and is arranged at the wind wheel of the inside of described spiral case, it is characterized in that: described cabinet air-conditioner is cylindrical or near cylindrical, described cabinet air-conditioner also comprises the all-bottom sound denoising structure as described in claim 1 to 8 any one, and described all-bottom sound denoising structure is installed on the top of described wind wheel.
10. cabinet air-conditioner as claimed in claim 9, is characterized in that: the described plate body of described turret wall distance of described all-bottom sound denoising structure position and described air outlet is farthest close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808963.5U CN203810689U (en) | 2013-12-10 | 2013-12-10 | Low frequency sound noise reduction structure and cabinet air conditioner with structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808963.5U CN203810689U (en) | 2013-12-10 | 2013-12-10 | Low frequency sound noise reduction structure and cabinet air conditioner with structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810689U true CN203810689U (en) | 2014-09-03 |
Family
ID=51449430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320808963.5U Expired - Lifetime CN203810689U (en) | 2013-12-10 | 2013-12-10 | Low frequency sound noise reduction structure and cabinet air conditioner with structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203810689U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091280A (en) * | 2015-09-07 | 2015-11-25 | 珠海格力电器股份有限公司 | Radome, air inlet system and circular cabinet air conditioner |
| CN108954441A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with autonomous channel formula spiral camber noise filtering device |
| WO2023035495A1 (en) * | 2021-09-13 | 2023-03-16 | Tcl空调器(中山)有限公司 | Noise type identification method, air conditioner, apparatus, and computer-readable storage medium |
-
2013
- 2013-12-10 CN CN201320808963.5U patent/CN203810689U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091280A (en) * | 2015-09-07 | 2015-11-25 | 珠海格力电器股份有限公司 | Radome, air inlet system and circular cabinet air conditioner |
| CN108954441A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with autonomous channel formula spiral camber noise filtering device |
| WO2023035495A1 (en) * | 2021-09-13 | 2023-03-16 | Tcl空调器(中山)有限公司 | Noise type identification method, air conditioner, apparatus, and computer-readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203454371U (en) | Low-noise air conditioner indoor cabinet unit | |
| CN203810689U (en) | Low frequency sound noise reduction structure and cabinet air conditioner with structure | |
| CN205717814U (en) | Noise reduction ring and indoor apparatus of air conditioner | |
| CN204084668U (en) | Air-conditioner outdoor unit ducting system and denoising device thereof | |
| CN106593961A (en) | Silencer and air conditioner with same | |
| WO2022135603A1 (en) | Silencing device and refrigerator | |
| CN104047895A (en) | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition | |
| CN103835999A (en) | Centrifugal volute and air conditioner indoor unit with same | |
| CN211423009U (en) | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof | |
| CN213270383U (en) | Noise reduction ventilator | |
| CN205401239U (en) | A volute blower for range hood | |
| CN110030720B (en) | Medium-high frequency silencer with cavity filled with bulk spheres | |
| CN210196089U (en) | Mute air blowing device | |
| CN201439999U (en) | Water heater of integrated hanging heat pump | |
| CN202066172U (en) | Soundproofing static pressure box | |
| CN207963542U (en) | A kind of cooling tower with denoising device | |
| CN110925240A (en) | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof | |
| CN105928169A (en) | Air outlet device and indoor vertical air conditioner with same | |
| CN214837366U (en) | Machine and air conditioning system in spiral case, new trend power component, air conditioning | |
| CN206377072U (en) | A kind of muffler and the air-conditioning with it | |
| CN109330155A (en) | A kind of hair dryer | |
| CN205909465U (en) | Air outlet device and indoor vertical air conditioner with same | |
| CN203783969U (en) | Centrifugal volute and air conditioner | |
| CN207539095U (en) | A kind of inhibition noise structure for wind turbine | |
| CN203980449U (en) | Air-conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |
|
| CX01 | Expiry of patent term |