CN210687445U - Double-square-shaped silencer for ventilating duct - Google Patents
Double-square-shaped silencer for ventilating duct Download PDFInfo
- Publication number
- CN210687445U CN210687445U CN201921834874.1U CN201921834874U CN210687445U CN 210687445 U CN210687445 U CN 210687445U CN 201921834874 U CN201921834874 U CN 201921834874U CN 210687445 U CN210687445 U CN 210687445U
- Authority
- CN
- China
- Prior art keywords
- silencer
- noise elimination
- air
- elimination unit
- muffler
- 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 - Fee Related
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 32
- 230000008030 elimination Effects 0.000 claims abstract description 27
- 238000003379 elimination reaction Methods 0.000 claims abstract description 27
- 239000011358 absorbing material Substances 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims description 10
- 230000030279 gene silencing Effects 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 9
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012814 acoustic material Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
Abstract
The utility model discloses a return font silencer for air pipe, which comprises a housin, be provided with air intake and air exit on the casing, the inside wind channel that has intercommunication air intake and air exit of casing, be provided with multiunit noise elimination unit in the wind channel, one of them set of noise elimination unit of adjacent two sets of noise elimination unit is located another set of noise elimination unit's periphery side, each set of noise elimination unit all includes a plurality of silencer inserted sheets along circumference interval arrangement, each silencer inserted sheet all extends along the length direction in wind channel, each silencer inserted sheet all includes outer orifice plate, the inlayer orifice plate, form the resonant cavity between outer orifice plate and inlayer orifice plate and fill the sound absorbing material in the resonant cavity. The low-frequency noise reduction device is particularly suitable for controlling low-frequency noise, has obvious noise reduction effect on pipelines such as ventilation equipment and air inlet and outlet channels of air conditioning equipment, can effectively solve the low-frequency noise generated by an air inlet and outlet of the equipment, and has better noise reduction effect.
Description
Technical Field
The utility model relates to a ventilation noise elimination equipment technical field, in particular to a back font silencer for air pipe.
Background
Often through the low frequency noise of installation wind channel silencer in order to solve air intake department and air outlet department production on current ventilation equipment's the air pipe, for example, air conditioning equipment's fan produces a large amount of low frequency noise when the operation, and air conditioning fan often installs outdoor, if do not install any silencing equipment, the noise pollution of its production is comparatively serious, influences people's life at home.
Conventional pipe mufflers generally include resistive mufflers, pipe mufflers, and resonant mufflers. The resistive muffler is muffled by utilizing the sound absorption effect of a sound absorption material, and is constructed by fixing the sound absorption material on the inner wall of a pipeline in which airflow flows, or arranging the sound absorption material in a pipeline or a shell in a certain mode to form the resistive muffler, wherein the sound absorption material can partially absorb sound energy incident on the sound absorption material. The acoustic energy is absorbed due to the porosity and bulkiness of the sound absorbing material. When sound waves enter the pores, they cause the air and material in the pores to vibrate slightly, and a considerable part of the sound is converted into heat energy and absorbed due to friction and viscous resistance. The silencer with the structure has good high-frequency and medium-frequency noise effects, but has poor low-frequency noise silencing performance.
The pipe muffler is the simplest muffler, and is also called a pipe liner because only one layer of sound absorbing material is attached to the inner periphery of the pipe wall. It features convenient manufacture, small resistance, but only suitable for smaller air duct, and the diameter is generally not more than 400 mm. The tubular muffler only has a certain muffling function for middle and high frequency sound absorption, and has poor noise control effect on low frequency performance.
The sound absorbing material generally has a low ability to absorb low-frequency noise, and it is not economical to increase the sound absorbing effect by increasing the thickness of the sound absorbing material alone. The resonance type silencer is in a form that a pipeline opening is connected with a resonance cavity, an elastic resonance system is formed by an air column at a small hole and air in the cavity, when the external noise frequency is the same as the natural frequency of the resonance system, the air column in the small hole resonates and violently rubs with the hole wall, the friction can consume sound energy, and therefore the purpose of silencing is achieved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a be suitable for the control of low frequency noise, the better back font silencer that is used for air pipe of noise reduction effect.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the utility model provides a return font silencer for air pipe, includes the casing, the casing on be provided with air intake and air exit, the casing inside have the intercommunication the air intake with the wind channel of air exit, the wind channel in be provided with multiunit noise elimination unit, adjacent two sets of noise elimination unit wherein a set of noise elimination unit is located another set of noise elimination unit's periphery side, each set of noise elimination unit all includes a plurality of silencer inserted sheets along circumference interval arrangement, each the silencer inserted sheet all follow the length direction in wind channel extends, each the silencer inserted sheet all include outer orifice plate, inlayer orifice plate, form the resonant cavity between outer orifice plate and inlayer orifice plate and fill the acoustical absorbent in the resonant cavity.
In the above technical scheme, preferably, each silencer insert is fixed on the shell through an angle fixing piece.
In the above technical solution, preferably, the angle fixing member is an angle iron.
In the above technical solution, preferably, the cross-sectional shape of the muffler insert and the cross-sectional shape of the housing are both rectangular.
In the above technical solution, preferably, the shell, the outer-layer orifice plate, and the inner-layer orifice plate are all made of metal material.
In the above technical solution, preferably, the sound absorbing material is sound absorbing cotton.
In the above technical solution, preferably, the air duct is further provided with a central insert located at the center of the innermost group of the silencing units.
In the above technical solution, preferably, the plurality of muffler inserts in each group of the muffler units are centrosymmetric with respect to the center point of the housing.
The utility model discloses combined the sound-absorbing characteristic of noise-absorbing material in the sound-absorbing structure of resonance type silencer resonant cavity and the resistance silencer, through set up multiunit noise elimination unit in the wind channel, one of them noise elimination unit of two sets of adjacent noise elimination unit is located the periphery side of another group noise elimination unit, each group noise elimination unit all includes a plurality of silencer inserted sheets along circumference interval arrangement, each silencer inserted sheet all extends along the length direction in wind channel, this kind of wind channel noise-absorbing structure resistance of returning the font is less; the silencer inserted sheet has the resonant cavity, and packs the acoustic material in the resonant cavity, is particularly suitable for the control of low frequency noise, and is showing to the noise reduction effect like the pipeline of ventilation equipment, the air conditioning equipment's the business turn over exhaust passage, can effectively solve the low frequency noise that equipment advances the air exit and produce, and noise reduction effect is better.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention;
FIG. 2 is a schematic structural view of a muffler insert of the present invention;
wherein: 1. a housing; 2. an air duct; 3. a muffler insert; 31. an outer layer orifice plate; 32. an inner layer orifice plate; 33. a resonant cavity; 34. a sound absorbing material.
Detailed Description
To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.
As shown in fig. 1, the muffler includes a housing 1 and a plurality of muffler units. An air inlet and an air outlet are arranged on the shell 1, and an air duct 2 communicated with the air inlet and the air outlet is arranged in the shell 1. The multiple groups of silencing units are arranged in the air duct 2. One of two adjacent sets of noise elimination units is located the periphery side of another set of noise elimination unit, and the center of wind channel 2 is equipped with central inserted sheet, and each set of noise elimination unit all includes a plurality of silencer inserted sheets 3 along circumference interval arrangement, and each silencer inserted sheet 3 all is fixed on casing 1 through angle bar equiangular fixing spare to constitute "returning" font-like noise elimination structure, preferably, each set of noise elimination unit in a plurality of silencer inserted sheets 3 the size the same, and can all be for the central point central symmetry of casing 1. The cross-sectional shape of the silencer insert 3 and the cross-sectional shape of the shell 1 are both rectangular. As shown in fig. 2, each muffler insert 3 is structured to include an outer orifice 31, an inner orifice 32, a resonance chamber 33 formed between the outer orifice 31 and the inner orifice 32, and a sound-deadening cotton 34 filled in the resonance chamber 33. The shell 1, the outer layer pore plate 31 and the inner layer pore plate 32 are made of metal materials. Of course, the sound deadening material 34 may be replaced with polyester fiber, a foamed material, or the like.
The noise elimination structure in the shape of the Chinese character hui is small in resistance, noise sound waves can enter the resonant cavity through the inner layer pore plate and the outer layer pore plate, in the process of friction with the pore plate pores, the sound energy is converted into mechanical heat energy, the noise is eliminated further by the sound absorption material, and the noise reduction control of low-frequency noise is remarkable. The noise reduction effect on pipelines such as ventilation equipment and air inlet and outlet channels of air conditioning equipment is remarkable, the low-frequency noise generated by the air inlet and outlet of the equipment can be effectively solved, and the noise reduction effect is better.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a back font silencer for air pipe, includes casing (1), casing (1) on be provided with air intake and air exit, casing (1) inside intercommunication has the air intake with air duct (2) of air exit, its characterized in that: wind channel (2) in be provided with multiunit noise elimination unit, one of them group noise elimination unit of two sets of adjacent noise elimination units is located another group's noise elimination unit periphery side, each group noise elimination unit all includes along a plurality of silencer inserted sheets (3) that circumference interval was arranged, each silencer inserted sheet (3) all follow the length direction in wind channel (2) extends, each silencer inserted sheet (3) all include outer orifice plate, inlayer orifice plate, form the resonant cavity between outer orifice plate and inlayer orifice plate and fill the sound absorbing material in the resonant cavity.
2. The muffler of claim 1, wherein: each silencer inserted sheet (3) is fixed on the shell (1) through an angle fixing piece.
3. The muffler of claim 2, wherein: the angle fixing piece is an angle iron.
4. The muffler of claim 1, wherein: the section shape of the silencer inserting piece (3) and the section shape of the shell (1) are both rectangular.
5. The muffler of claim 1, wherein: the shell (1), the outer layer pore plate and the inner layer pore plate are all made of metal materials.
6. The muffler of claim 1, wherein: the sound absorbing material is silencing cotton.
7. The muffler of claim 1, wherein: the air duct (2) is also internally provided with a central inserting sheet which is positioned at the center of the innermost group of the silencing units.
8. The muffler of claim 7, wherein: a plurality of silencer inserting pieces (3) in each group of the silencing units are centrosymmetric relative to the center point of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921834874.1U CN210687445U (en) | 2019-10-29 | 2019-10-29 | Double-square-shaped silencer for ventilating duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921834874.1U CN210687445U (en) | 2019-10-29 | 2019-10-29 | Double-square-shaped silencer for ventilating duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210687445U true CN210687445U (en) | 2020-06-05 |
Family
ID=70901804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921834874.1U Expired - Fee Related CN210687445U (en) | 2019-10-29 | 2019-10-29 | Double-square-shaped silencer for ventilating duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210687445U (en) |
-
2019
- 2019-10-29 CN CN201921834874.1U patent/CN210687445U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103835997B (en) | Air conditioner indoor unit and volute thereof | |
| CN104948265A (en) | Impedance compound muffler | |
| CN207993473U (en) | A kind of micropunch complex muffler | |
| CN203717447U (en) | Air conditioner indoor unit and volute thereof | |
| CN210830985U (en) | Rectangular array silencer for ventilation pipeline | |
| CN205654400U (en) | Silencer | |
| WO2019011313A1 (en) | Vacuum cleaner and motor module thereof | |
| CN208765234U (en) | Assembling bracket, fan assembly and air conditioner | |
| CN208671181U (en) | Assembling bracket, fan assembly and air conditioner | |
| CN210687445U (en) | Double-square-shaped silencer for ventilating duct | |
| CN104422111A (en) | Silencing structure of air conditioner and air conditioner | |
| CN204716362U (en) | Engineering machinery noise-reducing silencer | |
| CN206487543U (en) | A kind of diesel-driven generator exhaust silencer system | |
| CN212407949U (en) | Blowpipe silencer | |
| CN213454186U (en) | Wall-through silencer | |
| CN111365215B (en) | Pneumatic silencer | |
| CN113153825A (en) | A silencing device and fan for fan | |
| CN211342993U (en) | Self-silencing axial flow fan ventilation system for tunnel | |
| CN209944712U (en) | Noise elimination piece, silencer and ventilation system | |
| CN211041148U (en) | Variable air volume end device with noise reduction function and air conditioning system | |
| CN110775240A (en) | Detachable marine silencing ventilation pipe | |
| CN108286533B (en) | Silencer for air inlet of axial flow fan | |
| CN220984159U (en) | Double-deck perforated plate impedance compound symmetry formula amortization piece | |
| CN110822547A (en) | Variable air volume end device with noise reduction function and air conditioning system | |
| CN110821545A (en) | Self-silencing axial flow fan ventilation system for tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200605 |