CN204186643U - Volute and fan comprising same - Google Patents
Volute and fan comprising same Download PDFInfo
- Publication number
- CN204186643U CN204186643U CN201420599448.5U CN201420599448U CN204186643U CN 204186643 U CN204186643 U CN 204186643U CN 201420599448 U CN201420599448 U CN 201420599448U CN 204186643 U CN204186643 U CN 204186643U
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- China
- Prior art keywords
- spiral case
- sound
- chamber
- absorbing hole
- wall
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- Expired - Fee Related
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- 239000011358 absorbing material Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 6
- 230000008030 elimination Effects 0.000 description 6
- 238000003379 elimination reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a spiral case and contain fan of this spiral case. The volute includes: a volute outer wall (1); the volute inner wall (2) is sleeved in the volute outer wall (1) and forms a sound absorption cavity (3) with the volute outer wall (1), sound absorption holes (4) are formed in the volute inner wall (2), and the sound absorption holes (4) are communicated with the sound absorption cavity (3) and the volute inner cavity (6). According to the utility model discloses a spiral case can solve among the prior art the great problem of fan noise of effluenting.
Description
Technical field
The utility model relates to fan noise control technique field, in particular to a kind of spiral case and the blower fan comprising this spiral case.
Background technique
Current most of blower fan is due to all kinds of reason such as structure, operating mode, in its flow cavity, flow uniformity is difficult to ensure, the problems such as the separated flow that flowing is uneven to bring, blade-to-blade vortex and backflow all arrange at this, and this goes out to flow noise to blower fan considerable influence, can cause larger noise pollution.
Model utility content
A kind of spiral case is provided in the utility model embodiment and comprises the blower fan of this spiral case, go out to flow the larger problem of noise to solve blower fan in prior art.
For solving the problems of the technologies described above, the utility model embodiment provides a kind of spiral case, comprising: volute outer wall; Spiral case inwall, is set in volute outer wall, and and form the chamber that absorbs sound between volute outer wall, spiral case inwall is provided with sound-absorbing hole, and sound-absorbing hole is communicated with sound absorption chamber and spiral case inner chamber.
As preferably, the internal face of spiral case inwall has been sticked filter screen, and filter screen covers the internal face of spiral case inwall.
As preferably, the internal face of spiral case inwall is provided with chute, and filter screen is removably disposed in chute.
As preferably, be also provided with at least one space bar between spiral case inwall and volute outer wall, sound absorption chamber is divided into the first chamber and the second chamber by least one space bar, at least one space bar is provided with the intercommunicating pore be communicated with the second chamber in the first chamber.
As preferably, the first chamber is different with the degree of depth in the second chamber.
As preferably, spiral case inwall is provided with multiple sound-absorbing hole, the porosity ratio of sound-absorbing hole is σ≤2%, and the aperture of sound-absorbing hole is 1.5mm to 4mm.
As preferably, the aperture of sound-absorbing hole is 2mm to 3mm.
As preferably, in the chamber that absorbs sound, be filled with sound-absorbing material.
As preferably, spiral case inwall is provided with multiple sound-absorbing hole, the porosity ratio of sound-absorbing hole is 5%≤σ <50%, and the aperture of sound-absorbing hole is 2mm to 15mm.
As preferably, the aperture of sound-absorbing hole is 3mm to 8mm.
As preferably, the wall in sound absorption chamber is rigid plane.
According to another aspect of the present utility model, provide a kind of blower fan, comprise spiral case, this spiral case is above-mentioned spiral case.
Application the technical solution of the utility model, spiral case comprises: volute outer wall; Spiral case inwall, is set in volute outer wall, and and form the chamber that absorbs sound between volute outer wall, spiral case inwall is provided with sound-absorbing hole, and sound-absorbing hole is communicated with sound absorption chamber and spiral case inner chamber.By arranging sound-absorbing hole on spiral case inwall, and make between spiral case inwall and volute outer wall, to form sound absorption chamber, micropunch noise elimination structure can be formed, effectively can absorb spiral case inside and flow the turbulence noise produced, reduce the noise produced when blower fan goes out to flow, improve noise quality, improve fan performance.
Accompanying drawing explanation
Fig. 1 is the broken section structural representation of the spiral case of the utility model embodiment;
Fig. 2 is the structure for amplifying schematic diagram at the Q place of the first embodiment of spiral case according to Fig. 1;
Fig. 3 is the structure for amplifying schematic diagram at the Q place of the second embodiment of spiral case according to Fig. 1;
Fig. 4 is the structure for amplifying schematic diagram at the Q place of the 3rd embodiment of spiral case according to Fig. 1.
Description of reference numerals:
1, volute outer wall; 2, spiral case inwall; 3, absorb sound chamber; 4, sound-absorbing hole; 5, filter screen; 6, spiral case inner chamber; 7, chute; 8, space bar; 9, intercommunicating pore; 10, sound-absorbing material.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
See shown in Fig. 1 to 4, according to embodiment of the present utility model, spiral case comprises volute outer wall 1 and spiral case inwall 2, spiral case inwall 2 is set in volute outer wall 1, and and form the chamber 3 that absorbs sound between volute outer wall 1, spiral case inwall 2 is provided with sound-absorbing hole 4, sound-absorbing hole 4 is communicated with sound absorption chamber 3 and spiral case inner chamber 6.
By arranging sound-absorbing hole 4 on spiral case inwall 2, and make between spiral case inwall 2 and volute outer wall 1, to form sound absorption chamber 3, micropunch noise elimination structure can be formed, effectively can absorb spiral case inside and flow the turbulence noise produced, reduce the noise produced when blower fan goes out to flow, improve noise quality, improve fan performance.
Preferably, the internal face of spiral case inwall 2 has been sticked filter screen 5, filter screen 5 covers the internal face of spiral case inwall 2, the sound-absorbing hole 4 on spiral case inwall 2 can be avoided owing to being lost efficacy by impurity blockings such as dusts, effectively improve the fatigue resistant property of the sound-absorbing hole 4 on spiral case inwall 2.The internal face of spiral case inwall 2 herein refers to the face contacted with spiral case inner chamber 6 of spiral case inwall 2.
For the ease of dismounting, the internal face of spiral case inwall 2 is provided with chute 7, filter screen 5 is removably disposed in chute 7.Filter screen 5 can slip on spiral case inwall 2 along chute 7, to form better protection to sound-absorbing hole 4.Chute 7 can be T-slot etc. can form compressing structure groove to filter screen, filter screen 5 can be made to be adjacent on the internal face of spiral case inwall 2, makes filter screen 5 can improve the failure resistance of perforated microstructure under the prerequisite not affecting air flowing and noise.The aperture of filter screen 5 need be slightly less than the aperture of sound-absorbing hole 4, effectively filters blocking effect can play.
In conjunction with shown in Figure 2, according to the first embodiment of the present utility model, spiral case to coordinate with sound-absorbing hole 4 mainly through sound absorption chamber 3 and carries out noise elimination.In the present embodiment, have employed micropunch noise elimination structure, in the enterprising eleven punch 11 process of spiral case inwall 2, be sound absorption chamber 3 after spiral case inwall 2, sound absorption chamber 3 is cavity.
Sound wave, when by spiral case inwall 2, enters sound absorption chamber 3 by sound-absorbing hole 4, and dissipation of constantly vibrating in sound absorption chamber 3, makes reflective sound wave greatly weaken.Generally speaking, by appropriate design cavity, consider the parameters such as wall thickness, wall surface material, hole pitch and cavity depth, maximum frequency of noise elimination and extraordinary noise frequency are coincided, now can realize optimum noise reduction.
In the present embodiment, the porosity ratio of sound-absorbing hole 4 needs the less of setting, and to ensure the soundproof effect of the structure of resonant cavity absorbed sound in chamber 3, porosity ratio σ≤2% of general sound-absorbing hole 4, aperture is taken as 1.5mm-4mm.Preferably, aperture is taken as 2mm-3mm, can reduce die sinking difficulty of processing.The cavity depth in sound absorption chamber 3 is relevant to frequency of noise elimination, must determine in conjunction with actual measurement gained peak noise frequency, consider the acoustic absorptivity α >0.9 that the parameters such as wall thickness, wall surface material, hole pitch and cavity shape make this sound absorption chamber 3, to ensure that sound absorption chamber 3 can reach good acoustically effective simultaneously.
Preferably, the wall in sound absorption chamber 3 adopts rigid material to make, thus forms rigid plane, the wall in sound absorption chamber 3 can not be increased because airflow function produces larger vibration noise and flow noise.The rigid plane in sound absorption chamber 3 generally selects ABS plastic or aluminium sheet.
In conjunction with shown in Figure 3, according to the second embodiment of the present utility model, it is substantially identical with the first embodiment, and difference is, in the present embodiment, sound absorption is filled with sound-absorbing material 10 in chamber 3.In the present embodiment, need in the enterprising eleven punch 11 process of spiral case inwall 2 equally, but owing to there being the existence of packing, it is higher that the porosity ratio of sound-absorbing hole 4 can be arranged.Owing to being provided with the packing that sound-absorbing material 10 formed in sound absorption chamber 3, sound wave is entered after in sound absorption chamber 3 through sound-absorbing hole 4, energy dissipation simultaneously partly absorb by sound-absorbing material 10, thus realize noise reduction.The damping function of sound-absorbing material 10 is mainly utilized to eliminate the noise to the sound wave imported in sound absorption chamber 3 in the present embodiment.
In the present embodiment, spiral case inwall 2 is provided with multiple sound-absorbing hole 4, the porosity ratio of sound-absorbing hole 4 is 5%≤σ <50%, and the aperture of sound-absorbing hole 4 is 2mm to 15mm.Preferably, the aperture of sound-absorbing hole 4 is 3mm to 8mm, thus make fan performance remain on a more excellent level, cavity depth is similar with the first embodiment, its inner chamber need fill up sound-absorbing material 10, generally select porous material such as sound absorption sponge or acoustical cotton etc. as packing, the acoustic absorptivity in program sound absorption chamber 3 need meet acoustic absorptivity α >0.9 equally.
In conjunction with shown in Figure 4, according to the 3rd embodiment of the present utility model, it is substantially identical with the first embodiment, difference is, in the present embodiment, also be provided with space bar 8 between spiral case inwall 2 and volute outer wall 1, sound absorption chamber 3 is divided into the first chamber and the second chamber by space bar 8, space bar 8 is provided with the intercommunicating pore 9 be communicated with the second chamber in the first chamber.Intercommunicating pore 9 can adopt the specification identical with sound-absorbing hole 4 and set-up mode.Space bar 8 can be set to one, two or more, thus form multilayer perforation structure.The degree of depth in each layer sound absorption chamber 3 is identical, is comparatively conducive to the reduction of turbulence noise near a certain frequency range, and each layer sound absorption chamber 3 adopts different depth, then greatly can widen the noise reduction frequency range of spiral case, improve the anti-acoustic capability of spiral case.In the present embodiment, the first chamber is different with the degree of depth in the second chamber.The degree of depth in the first chamber refers to the span between spiral case inwall 2 and space bar 8, and the degree of depth in the second chamber refers to the span between volute outer wall 1 and space bar 8.
According to embodiment of the present utility model, blower fan comprises spiral case, and this spiral case is above-mentioned spiral case.
Certainly, be more than preferred implementation of the present utility model.It should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model basic principle, can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (12)
1. a spiral case, is characterized in that, comprising:
Volute outer wall (1);
Spiral case inwall (2), be set in described volute outer wall (1), and and form the chamber (3) that absorbs sound between described volute outer wall (1), described spiral case inwall (2) is provided with sound-absorbing hole (4), and described sound-absorbing hole (4) is communicated with described sound absorption chamber (3) and spiral case inner chamber (6).
2. spiral case according to claim 1, is characterized in that, the internal face of described spiral case inwall (2) has been sticked filter screen (5), and described filter screen (5) covers the internal face of described spiral case inwall (2).
3. spiral case according to claim 2, is characterized in that, the internal face of described spiral case inwall (2) is provided with chute (7), and described filter screen (5) is removably disposed in described chute (7).
4. spiral case according to claim 3, it is characterized in that, at least one space bar (8) is also provided with between described spiral case inwall (2) and described volute outer wall (1), described sound absorption chamber (3) is divided into the first chamber and the second chamber by described at least one space bar (8), described at least one space bar (8) is provided with the intercommunicating pore (9) be communicated with described second chamber in described first chamber.
5. spiral case according to claim 4, is characterized in that, described first chamber is different with the degree of depth in described second chamber.
6. spiral case according to any one of claim 1 to 5, it is characterized in that, described spiral case inwall (2) is provided with multiple sound-absorbing hole (4), the porosity ratio of described sound-absorbing hole (4) is σ≤2%, and the aperture of described sound-absorbing hole (4) is 1.5mm to 4mm.
7. spiral case according to claim 6, is characterized in that, the aperture of described sound-absorbing hole (4) is 2mm to 3mm.
8. spiral case according to any one of claim 1 to 5, is characterized in that, is filled with sound-absorbing material (10) in described sound absorption chamber (3).
9. spiral case according to claim 8, it is characterized in that, described spiral case inwall (2) is provided with multiple sound-absorbing hole (4), the porosity ratio of described sound-absorbing hole (4) is 5%≤σ <50%, and the aperture of described sound-absorbing hole (4) is 2mm to 15mm.
10. spiral case according to claim 9, is characterized in that, the aperture of described sound-absorbing hole (4) is 3mm to 8mm.
11. spiral cases according to any one of claim 1 to 5, is characterized in that, the wall of described sound absorption chamber (3) is rigid plane.
12. 1 kinds of blower fans, comprise spiral case, it is characterized in that, the spiral case of described spiral case according to any one of claim 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599448.5U CN204186643U (en) | 2014-10-16 | 2014-10-16 | Volute and fan comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599448.5U CN204186643U (en) | 2014-10-16 | 2014-10-16 | Volute and fan comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204186643U true CN204186643U (en) | 2015-03-04 |
Family
ID=52618652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420599448.5U Expired - Fee Related CN204186643U (en) | 2014-10-16 | 2014-10-16 | Volute and fan comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204186643U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314874A (en) * | 2014-10-16 | 2015-01-28 | 珠海格力电器股份有限公司 | Volute and fan comprising same |
| CN104675752A (en) * | 2015-03-16 | 2015-06-03 | 中国机械工业集团有限公司 | Centrifugal fan volute employing granular damping vibration attenuation |
| CN111255746A (en) * | 2018-11-30 | 2020-06-09 | 无锡小天鹅电器有限公司 | Volute air duct, fan assembly and clothes dryer |
| IT201900006861A1 (en) * | 2019-05-15 | 2020-11-15 | Denso Thermal Systems Spa | Centrifugal fan with sound absorbing structure for automotive HVAC systems |
| CN115342083A (en) * | 2022-09-19 | 2022-11-15 | 杭州老板电器股份有限公司 | Volute component, noise reduction design method of volute component, fan and range hood |
| WO2023245797A1 (en) * | 2022-06-22 | 2023-12-28 | Tcl王牌电器(惠州)有限公司 | Air passage structure and air purifier |
-
2014
- 2014-10-16 CN CN201420599448.5U patent/CN204186643U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314874A (en) * | 2014-10-16 | 2015-01-28 | 珠海格力电器股份有限公司 | Volute and fan comprising same |
| CN104675752A (en) * | 2015-03-16 | 2015-06-03 | 中国机械工业集团有限公司 | Centrifugal fan volute employing granular damping vibration attenuation |
| CN111255746A (en) * | 2018-11-30 | 2020-06-09 | 无锡小天鹅电器有限公司 | Volute air duct, fan assembly and clothes dryer |
| IT201900006861A1 (en) * | 2019-05-15 | 2020-11-15 | Denso Thermal Systems Spa | Centrifugal fan with sound absorbing structure for automotive HVAC systems |
| WO2023245797A1 (en) * | 2022-06-22 | 2023-12-28 | Tcl王牌电器(惠州)有限公司 | Air passage structure and air purifier |
| CN115342083A (en) * | 2022-09-19 | 2022-11-15 | 杭州老板电器股份有限公司 | Volute component, noise reduction design method of volute component, fan and range hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150304 |