CN107339264A - A kind of blower fan system auxiliary denoising device of single air-inlet range hood - Google Patents
A kind of blower fan system auxiliary denoising device of single air-inlet range hood Download PDFInfo
- Publication number
- CN107339264A CN107339264A CN201710154783.2A CN201710154783A CN107339264A CN 107339264 A CN107339264 A CN 107339264A CN 201710154783 A CN201710154783 A CN 201710154783A CN 107339264 A CN107339264 A CN 107339264A
- Authority
- CN
- China
- Prior art keywords
- noise reduction
- blower fan
- fan system
- range hood
- single air
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Abstract
The invention discloses a kind of blower fan system of single air-inlet range hood to aid in denoising device, including spiral case, impeller and blower motor, blower fan system front end air intake, the blower motor to be arranged on blower fan system rear end, it is characterised in that：Noise reduction cavity is provided with space between the spiral case rear wall and impeller rearward end, the noise reduction cavity is circumferentially positioned at around the blower motor, and noise reduction hole is provided with the wall of the noise reduction cavity.The advantage of the invention is that：After the blower fan system auxiliary denoising device of single air-inlet range hood sets noise reduction cavity in the space between spiral case rear wall and impeller rearward end, the gap between impeller hub disk and spiral case rear wall can be reduced, so as to effectively reduce return loss, reduce turbulent flow simultaneously, reduce noise, and after noise reduction cavity is circumferentially positioned at around blower motor and sets noise reduction hole on noise reduction cavity, the noise of motor in itself can be effectively reduced, and then substantially reduce the noise of whole blower fan system.
Description
Technical field
The present invention relates to a kind of range hood, and noise reduction is aided in more particularly, to a kind of blower fan system of single air-inlet range hood
Device.
Background technology
The blower fan system of single air intake is widely used as the type that cooking-fume exhauster blower system is commonly used, and is particularly applied
In near-suction type oil smoke suction machine field.There is certain gap between the spiral case rear wall and impeller of single air intake blower fan system, this
Gap can cause to flow back, that is, the flow of blower fan real work can reduce, and pressure reduces, while gas backstreaming forms turbulent flow,
And then produce noise.The noise source of range hood, some comes from aerodynamic noise caused by fluid machinery, and another part comes
The self-driven motor noise of itself.
At present, in order to reduce the noise of blower fan system, it is common practice to which the current collector structure at air inlet is entered
Row improve, as Patent No. 201210230512.8 (Authorization Notice No. is CN 102767541B) Chinese invention patent public affairs
Open《A kind of noise reduction afflux circle and the lampblack absorber using the afflux circle》, it passes through the shape between the outer ring of afflux circle and inner ring
Integrated cavity, by changing the propagation path of sound wave and interfering between each other to reduce noise, it can be seen that, this suction
Lampblack absorber does not account for the problem of producing noise because of the gap between spiral case rear wall and impeller, when being worked for blower motor
Caused noise does not account for yet.In summary, need to be further improved the denoising structure of existing blower fan system.
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned state of the art, there is provided one kind can be reduced back effectively
Stream loss and turbulent flow, the blower fan system auxiliary denoising device of the less single air-inlet range hood of noise.
Technical scheme is used by the present invention solves above-mentioned technical problem：The blower fan system of single air-inlet range hood is auxiliary
Denoising device, including spiral case, impeller and blower motor, blower fan system front end air intake are helped, the blower motor is arranged on blower fan system
System rear end, it is characterised in that：Noise reduction cavity, the noise reduction cavity are provided with space between the spiral case rear wall and impeller rearward end
It is circumferentially positioned at around the blower motor, noise reduction hole is provided with the wall of the noise reduction cavity.
Preferably, the noise reduction cavity has internal face and front face, and the internal face is to be looped around around blower motor
Anchor ring, described noise reduction hole is provided with the internal face and/or front face.
Noise reduction hole can have various structures, it is preferable that described noise reduction hole is through hole.After through hole, the last of the twelve Earthly Branches can be utilized
Mu Huozi resonance principles reduce the aerodynamic noise of blower fan system, and noise reduction is more preferable.
In order to further improve noise reduction, the inside of the noise reduction cavity is divided into multiple independent silencing cavities, each
Described silencing cavity is corresponding with least one described through hole.
In order to further improve noise reduction, acoustical cotton is filled with described silencing cavity.Certainly, except filling sound-absorbing
Outside cotton, other quieter materials can also be filled.
Noise reduction hole can have various structures, it is preferable that described noise reduction hole is blind hole, the blind hole on noise reduction cavity internal face
Opening is towards inner side, and the opening of the blind hole on noise reduction cavity front face is towards front side.
As a kind of preferred scheme, front shroud is installed in the space between the spiral case rear wall and impeller rearward end,
Described noise reduction cavity is formed between front shroud and the spiral case rear wall, the noise reduction hole is on the front shroud.
Front shroud can have various structures, it is preferable that the medial surface of the front shroud forms described internal face, front shroud
Leading flank form described front face, and the oblique rear-inclined of leading flank from-inner-to-outer.
As another preferred scheme, the inner side of the spiral case rear wall is looped around wind formed with preceding convex portion, the preceding convex portion
Around electromechanical machine, back shroud is also equipped with spiral case rear wall, the preceding convex portion surrounds described noise reduction cavity with the back shroud.
Further preferably, the preceding convex portion has the inner side anchor ring being looped around around blower motor and close impeller hub disk
Front side anchor ring, the inner side anchor ring forms described internal face, and the front side anchor ring forms described front face.
Compared with prior art, the advantage of the invention is that：The blower fan system auxiliary noise reduction dress of single air-inlet range hood
Put after noise reduction cavity is set in the space between spiral case rear wall and impeller rearward end, can reduce impeller hub disk and spiral case rear wall it
Between gap, so as to effectively reduce return loss, while reduce turbulent flow, reduce noise, and noise reduction cavity is circumferentially positioned at blower fan
After noise reduction hole is set around motor and on noise reduction cavity, the noise of motor in itself can be effectively reduced, and then make whole blower fan system
The noise of system substantially reduces.
Brief description of the drawings
Fig. 1 is the structure sectional view of the embodiment of the present invention one；
Fig. 2 is the structural representation of the front shroud of the embodiment of the present invention one；
Fig. 3 is the internal structure schematic diagram of front shroud shown in Fig. 2；
Fig. 4 is the structural representation of the embodiment of the present invention two；
Fig. 5 is the structural representation after the silencing cavity of the embodiment of the present invention two and front shroud separate；
Fig. 6 is the structure sectional view of the embodiment of the present invention three；
Fig. 7 is the spiral case of the embodiment of the present invention three and the mounting structure schematic diagram of back shroud；
Fig. 8 is the structure sectional view of the embodiment of the present invention four；
Fig. 9 is the partial exploded view of the embodiment of the present invention four.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one：
As shown in Figure 1 to Figure 3, the blower fan system auxiliary denoising device of single air-inlet range hood in the present embodiment includes snail
Shell 1, impeller 2 and blower motor 3, blower fan system front end air intake, blower motor 3 is arranged on blower fan system rear end, in the rear wall of spiral case 1
Noise reduction cavity 4 is provided with space between the rearward end of impeller 2, noise reduction cavity 4 is circumferentially positioned at around blower motor 3, in noise reduction
Noise reduction hole is provided with the wall of chamber 4.
Using direction shown in Fig. 1 arrows A as before to before being provided with the space between the rear wall of spiral case 1 and the rearward end of impeller 2
Cover plate 5, noise reduction cavity 4 being formed between front shroud 5 and the rear wall of spiral case 1, the medial surface 51 of front shroud 5 forms the internal face of noise reduction cavity 4,
Medial surface 51 is the anchor ring being looped around around blower motor 3, and the leading flank 52 of front shroud 5 forms the front face of noise reduction cavity 4, preceding
The oblique rear-inclined of the from-inner-to-outer of side 52.
In the present embodiment, noise reduction hole uses the less through hole 7 in aperture, thus, is formed between the rear wall of spiral case 1 and front shroud 5
Helmholtz resonance chamber, helmholtz resonance principle can be utilized to reduce the aerodynamic noise of blower fan system, noise reduction is more preferable, together
When prevent pressure release.Wherein, the through hole 7 being arranged on the internal face of noise reduction cavity 4 is mainly used to the noise of denoising draught fan motor, is arranged on
Through hole 7 on the front face of noise reduction cavity 4 be mainly used to reduce because of turbulent flow and caused by noise.
Embodiment two：
As shown in Figure 4 and Figure 5, the present embodiment changes the structure of noise reduction cavity on the basis of embodiment one, the noise reduction cavity
Inside is divided into multiple independent silencing cavities 41, and each silencing cavity 41 is corresponding with a through hole 7.So, it is each independent
Silencing cavity 41 can utilize helmholtz resonance principle to reduce aerodynamic noise, so as to obtain more preferable noise reduction.
In addition, the quieter materials such as acoustical cotton can be filled in silencing cavity 41, to obtain more preferable erasure effect.
Embodiment three：
As shown in Figure 6 and Figure 7, in the present embodiment, the inner side of the rear wall of spiral case 1 is stretched forward formed with preceding convex portion 11, lordosis
Portion 11 has the inner side anchor ring 111 being looped around around blower motor 3 and the front side anchor ring 112 close to the hub disk of impeller 2, its
In, inner side anchor ring 111 forms internal face, and front side anchor ring 112 forms front face.In addition, after the rear wall of spiral case 1 is also equipped with
Cover plate 6, preceding convex portion 11 surround noise reduction cavity with back shroud 6.
Example IV：
As shown in Figure 8 and Figure 9, the present embodiment changes the structure of noise reduction cavity on the basis of embodiment three, the noise reduction cavity
Inside is divided into multiple independent silencing cavities 41, and each silencing cavity 41 is corresponding with a through hole 7.So, it is each independent
Silencing cavity 41 can utilize helmholtz resonance principle to reduce aerodynamic noise, so as to obtain more preferable noise reduction.
It the foregoing is only the preferred embodiment of the present invention, it is noted that for those of ordinary skills,
Under the premise of the principle of the present invention is not departed from, a variety of remodeling or improvement can be carried out to the present invention, such as, noise reduction hole can also adopt
With blind hole, for the blind hole on noise reduction cavity internal face, opening is designed to towards inner side, for the blind hole on noise reduction cavity front face,
Opening is designed to towards front side, these are regarded as within protection scope of the present invention.
Claims (10)
1. a kind of blower fan system auxiliary denoising device of single air-inlet range hood, including spiral case (1), impeller (2) and blower motor
(3), blower fan system front end air intake, the blower motor (3) are arranged on blower fan system rear end, it is characterised in that：In the spiral case
(1) noise reduction cavity (4) is provided with the space between rear wall and impeller (2) rearward end, the noise reduction cavity (4) is circumferentially positioned at the wind
Around electromechanical machine (3), noise reduction hole is provided with the wall of the noise reduction cavity (4).
2. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 1, it is characterised in that：It is described
Noise reduction cavity (4) has internal face and front face, and the internal face is the anchor ring being looped around around blower motor (3), described
Described noise reduction hole is provided with internal face and/or front face.
3. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 2, it is characterised in that：It is described
Noise reduction hole be through hole (7).
4. the blower fan system auxiliary denoising device of described single air-inlet range hood according to claim 3, it is characterised in that：Institute
The inside for stating noise reduction cavity (4) is divided into multiple independent silencing cavities (41), each described silencing cavity (41) be corresponding with to
Through hole (7) described in few one.
5. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 4, it is characterised in that：Institute
Acoustical cotton is filled with the silencing cavity (41) stated.
6. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 2, it is characterised in that：It is described
Noise reduction hole be blind hole, the opening of the blind hole on noise reduction cavity internal face is towards inner side, the opening of the blind hole on noise reduction cavity front face
Towards front side.
7. the blower fan system auxiliary noise reduction dress of single air-inlet range hood according to any claim in claim 2 to 6
Put, it is characterised in that：Front shroud (5), institute are installed in space between the spiral case (1) rear wall and impeller (2) rearward end
State and described noise reduction cavity (4) is formed between front shroud (5) and spiral case (1) rear wall, the noise reduction hole is located at the front shroud (5)
On.
8. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 7, it is characterised in that：It is described
The medial surface (51) of front shroud (5) forms described internal face, and the leading flank (52) of front shroud (5) forms described front face,
And the oblique rear-inclined of leading flank (52) from-inner-to-outer.
9. the blower fan system auxiliary noise reduction dress of single air-inlet range hood according to any claim in claim 2 to 6
Put, it is characterised in that：The inner side of spiral case (1) rear wall is looped around blower fan formed with preceding convex portion (11), the preceding convex portion (11)
Around motor (3), back shroud (6) is also equipped with spiral case (1) rear wall, the preceding convex portion (11) is enclosed with the back shroud (6)
Into described noise reduction cavity (4).
10. the blower fan system auxiliary denoising device of single air-inlet range hood according to claim 9, it is characterised in that：Institute
Stating preceding convex portion (11) has the front side of the inner side anchor ring (111) being looped around around blower motor (3) and close impeller (2) hub disk
Anchor ring (112), the inner side anchor ring (111) form described internal face, and the front side anchor ring (112) forms described
Front face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154783.2A CN107339264A (en) | 2017-03-15 | 2017-03-15 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154783.2A CN107339264A (en) | 2017-03-15 | 2017-03-15 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107339264A true CN107339264A (en) | 2017-11-10 |
Family
ID=60223181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710154783.2A Pending CN107339264A (en) | 2017-03-15 | 2017-03-15 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107339264A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882777A (en) * | 2017-11-22 | 2018-04-06 | 奥普家居股份有限公司 | A kind of suppression noise structure for blower fan |
| CN109210013A (en) * | 2018-11-30 | 2019-01-15 | 泛仕达机电股份有限公司 | A kind of noise reducing type blower air-ducting ring and the blower including the air-ducting ring |
| CN110094367A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of denoising structure of blower deflector |
| CN110274277A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood and its method for noise reduction control |
| CN110274270A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
| CN111237249A (en) * | 2018-11-28 | 2020-06-05 | 宁波方太厨具有限公司 | Fan system of range hood |
| TWI735813B (en) * | 2018-10-26 | 2021-08-11 | 元山科技工業股份有限公司 | Noise reduction fan device |
| CN114962323A (en) * | 2022-06-10 | 2022-08-30 | 合肥通用机械研究院有限公司 | Low-vibration low-noise centrifugal fan adopting gas bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201448291U (en) * | 2009-06-12 | 2010-05-05 | 美的集团有限公司 | Fan volute structure of range hood |
| CN102767541A (en) * | 2012-07-04 | 2012-11-07 | 宁波方太厨具有限公司 | Noise reducing flow concentration ring and range hood employing same |
| EP3066345A1 (en) * | 2013-12-23 | 2016-09-14 | Fisher&Paykel Healthcare Limited | Blower for breathing apparatus |
| CN205744603U (en) * | 2016-01-12 | 2016-11-30 | 广东美的制冷设备有限公司 | Vortex fan spiral case, vortex fan and air-conditioner |
| CN206592349U (en) * | 2017-03-15 | 2017-10-27 | 宁波方太厨具有限公司 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
-
2017
- 2017-03-15 CN CN201710154783.2A patent/CN107339264A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201448291U (en) * | 2009-06-12 | 2010-05-05 | 美的集团有限公司 | Fan volute structure of range hood |
| CN102767541A (en) * | 2012-07-04 | 2012-11-07 | 宁波方太厨具有限公司 | Noise reducing flow concentration ring and range hood employing same |
| EP3066345A1 (en) * | 2013-12-23 | 2016-09-14 | Fisher&Paykel Healthcare Limited | Blower for breathing apparatus |
| CN205744603U (en) * | 2016-01-12 | 2016-11-30 | 广东美的制冷设备有限公司 | Vortex fan spiral case, vortex fan and air-conditioner |
| CN206592349U (en) * | 2017-03-15 | 2017-10-27 | 宁波方太厨具有限公司 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
Non-Patent Citations (1)
| Title |
|---|
| 刘晓良;祁大同;刘天一;袁民建;: "前向离心风机吸声蜗壳降噪的试验研究" * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882777A (en) * | 2017-11-22 | 2018-04-06 | 奥普家居股份有限公司 | A kind of suppression noise structure for blower fan |
| CN110094367A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of denoising structure of blower deflector |
| CN110094367B (en) * | 2018-01-31 | 2024-01-23 | 宁波方太厨具有限公司 | Noise reduction structure of fan guide plate |
| CN110274277A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood and its method for noise reduction control |
| CN110274270A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
| CN110274277B (en) * | 2018-03-13 | 2024-01-23 | 宁波方太厨具有限公司 | Noise-reduction type range hood and noise-reduction control method thereof |
| CN110274270B (en) * | 2018-03-13 | 2024-02-20 | 宁波方太厨具有限公司 | Noise-reducing type range hood |
| TWI735813B (en) * | 2018-10-26 | 2021-08-11 | 元山科技工業股份有限公司 | Noise reduction fan device |
| CN111237249A (en) * | 2018-11-28 | 2020-06-05 | 宁波方太厨具有限公司 | Fan system of range hood |
| CN109210013A (en) * | 2018-11-30 | 2019-01-15 | 泛仕达机电股份有限公司 | A kind of noise reducing type blower air-ducting ring and the blower including the air-ducting ring |
| CN114962323A (en) * | 2022-06-10 | 2022-08-30 | 合肥通用机械研究院有限公司 | Low-vibration low-noise centrifugal fan adopting gas bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107339264A (en) | A kind of blower fan system auxiliary denoising device of single air-inlet range hood | |
| CN206592349U (en) | A kind of blower fan system auxiliary denoising device of single air-inlet range hood | |
| CN105526193B (en) | A kind of volute of blower for range hood | |
| CN106402974B (en) | A kind of noise reduction range hood | |
| CN106568109B (en) | A kind of application has the range hood of noise reduction impeller | |
| CN106482187B (en) | A kind of application has the range hood of noise reduction impeller | |
| WO2017133371A1 (en) | Ceiling-mounted exhaust hood | |
| CN206207518U (en) | A kind of noise reduction impeller and application have the range hood of the impeller | |
| MY135843A (en) | A filter housing | |
| JP2006300052A (en) | Resonator and engine incorporating the same | |
| CN102518603A (en) | Fan of range hood and range hood provided with same | |
| CN206176503U (en) | Range hood that makes an uproar falls | |
| CN109140547A (en) | Range hood | |
| CN204627718U (en) | A kind of motor silencer | |
| CN109057919A (en) | A kind of high-efficient noise-reducing muffler | |
| CN206207517U (en) | A kind of noise reduction impeller and application have the range hood of the impeller | |
| CN205401239U (en) | A volute blower for range hood | |
| CN108087342A (en) | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure | |
| CN211423009U (en) | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof | |
| CN208619414U (en) | A kind of pressurized centrifugan blower | |
| CN108386889A (en) | Range hood | |
| CN2856435Y (en) | Autocar rear silencer assembly | |
| CN206617215U (en) | A kind of MPV exhaust silencer devices | |
| CN208237948U (en) | Range hood | |
| CN208885364U (en) | A kind of high-efficient noise-reducing muffler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |