CN206592349U - 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
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- CN206592349U CN206592349U CN201720254368.XU CN201720254368U CN206592349U CN 206592349 U CN206592349 U CN 206592349U CN 201720254368 U CN201720254368 U CN 201720254368U CN 206592349 U CN206592349 U CN 206592349U
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- noise reduction
- blower fan
- fan system
- range hood
- single air
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Abstract
Denoising device, including spiral case, impeller and blower motor are aided in the utility model discloses a kind of blower fan system of single air-inlet range hood, blower fan system front end air intake, the blower motor is 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 utility model has the advantage of：The blower fan system auxiliary denoising device of single air-inlet range hood is set after 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 reduction return loss, turbulent flow is reduced simultaneously, reduce noise, and noise reduction cavity is circumferentially positioned at around blower motor and set on noise reduction cavity behind noise reduction hole, can effectively reduce the noise of motor in itself, and then substantially reduce the noise of whole blower fan system.
Description
Technical field
The utility model is related to a kind of range hood, is aided in more particularly, to a kind of blower fan system of single air-inlet range hood
Denoising device.
Background technology
The type that the blower fan system of single air intake is commonly used as cooking-fume exhauster blower system is widely used, and is particularly applied
In near-suction type oil smoke suction machine field.Certain gap is there is between the spiral case rear wall and impeller of single air intake blower fan system, this
Gap can cause backflow, that is, the flow of blower fan real work to reduce, pressure reduction, while gas backstreaming forms turbulent flow,
And then produce noise.The noise source of range hood, some aerodynamic noise produced from fluid machinery, 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, noise is reduced by changing the propagation path of sound wave and interfering each other, it can be seen that, it is this to inhale
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
The noise of generation is not accounted for yet.In summary, need to be further improved the denoising structure of existing blower fan system.
Utility model content
Technical problem to be solved in the utility model can be effectively dropped there is provided one kind for above-mentioned state of the art
The blower fan system auxiliary denoising device of low return loss and the less single air-inlet range hood of turbulent flow, noise.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：The blower fan system of single air-inlet range hood
System auxiliary denoising device, including spiral case, impeller and blower motor, blower fan system front end air intake, the blower motor are arranged on wind
Machine System Back-end, it is characterised in that：Noise reduction cavity, the drop are provided with space between the spiral case rear wall and impeller rearward end
Chamber of making an uproar is circumferentially positioned at around the blower motor, and 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, is provided with described noise reduction hole on 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, it is possible to use the last of the twelve Earthly Branches
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 to that should have the through hole described at least one.
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 the blind hole on blind hole, 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 constitutes described internal face, front shroud
Leading flank constitute described front face, and the oblique rear-inclined of leading flank from-inner-to-outer.
As another preferred scheme, preceding convex portion is formed with the inside of the spiral case rear wall, the preceding convex portion is looped around wind
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 and close impeller hub disk being looped around around blower motor
Front side anchor ring, the inner side anchor ring constitutes described internal face, and the front side anchor ring constitutes described front face.
Compared with prior art, the utility model has the advantage of：The blower fan system auxiliary drop of single air-inlet range hood
Device of making an uproar is set after noise reduction cavity in the space between spiral case rear wall and impeller rearward end, can be reduced after impeller hub disk and spiral case
Gap between wall, so as to effectively reduction return loss, while reducing turbulent flow, reduces noise, and noise reduction cavity is circumferentially positioned at
Set around blower motor and on noise reduction cavity behind noise reduction hole, the noise of motor in itself can be effectively reduced, and then make whole wind
The noise of machine system is substantially reduced.
Brief description of the drawings
Fig. 1 is the structure sectional view of the utility model embodiment one；
Fig. 2 is the structural representation of the front shroud of the utility model embodiment one；
Fig. 3 is the internal structure schematic diagram of front shroud shown in Fig. 2；
Fig. 4 is the structural representation of the utility model embodiment two；
Structural representations of the Fig. 5 for the silencing cavity and front shroud of the utility model embodiment two after separated；
Fig. 6 is the structure sectional view of the utility model embodiment three；
Fig. 7 is the spiral case of the utility model embodiment three and the mounting structure schematic diagram of back shroud；
Fig. 8 is the structure sectional view of the utility model example IV；
Fig. 9 is the partial exploded view of the utility model example IV.
Embodiment
The utility model 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 are 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 to be preceding 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, forms noise reduction cavity 4 between front shroud 5 and the rear wall of spiral case 1, the medial surface 51 of front shroud 5 constitutes 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 constitutes the front face of noise reduction cavity 4, preceding
The oblique rear-inclined of 52 from-inner-to-outers sideways.
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, it is possible to use helmholtz resonance principle reduces 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 is mainly used to reduce the noise produced by turbulent flow.
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 to that should have a through hole 7.So, it is each independent
Silencing cavity 41 can reduce aerodynamic noise using helmholtz resonance principle, 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, which is stretched forward, is 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 constitutes internal face, and front side anchor ring 112 constitutes front face.In addition, after the rear wall of spiral case 1 is also equipped with
Cover plate 6, preceding convex portion 11 surrounds 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 to that should have a through hole 7.So, it is each independent
Silencing cavity 41 can reduce aerodynamic noise using helmholtz resonance principle, so as to obtain more preferable noise reduction.
It the foregoing is only preferred embodiment of the present utility model, it is noted that for those of ordinary skill in the art
For, under the premise of principle of the present utility model is not departed from, a variety of remodeling or improvement can be carried out to the utility model, such as,
Noise reduction hole can also use blind hole, for the blind hole on noise reduction cavity internal face, opening is designed to towards inner side, before noise reduction cavity
Blind hole on wall, is designed to opening towards front side, these are regarded as within protection domain of the present utility model.
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) is 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) to should have 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) constitutes described internal face, and the leading flank (52) of front shroud (5) constitutes 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：Preceding convex portion (11) is formed with the inside of spiral case (1) rear wall, the preceding convex portion (11) is looped around blower fan
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 inner side anchor ring (111) being looped around around blower motor (3) and the front side close to impeller (2) hub disk
Anchor ring (112), the inner side anchor ring (111) constitutes described internal face, and the front side anchor ring (112) constitutes described
Front face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720254368.XU CN206592349U (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 |
|---|---|---|---|
| CN201720254368.XU CN206592349U (en) | 2017-03-15 | 2017-03-15 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
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| CN206592349U true CN206592349U (en) | 2017-10-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339264A (en) * | 2017-03-15 | 2017-11-10 | 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 |
| CN108240647A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN108240649A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN108240652A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN110397631A (en) * | 2019-06-21 | 2019-11-01 | 上海德惠特种风机有限公司 | A kind of inhibition noise structure for blower |
-
2017
- 2017-03-15 CN CN201720254368.XU patent/CN206592349U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339264A (en) * | 2017-03-15 | 2017-11-10 | 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 |
| CN108240647A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN108240649A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN108240652A (en) * | 2017-10-31 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of frequency conversion noise reduction outlet housing of range hood |
| CN108240647B (en) * | 2017-10-31 | 2023-11-17 | 宁波方太厨具有限公司 | Variable-frequency noise-reduction air outlet cover of range hood |
| CN108240652B (en) * | 2017-10-31 | 2024-01-16 | 宁波方太厨具有限公司 | Variable-frequency noise-reduction air outlet cover of range hood |
| CN108240649B (en) * | 2017-10-31 | 2024-01-16 | 宁波方太厨具有限公司 | Variable-frequency noise-reduction air outlet cover of range hood |
| CN110397631A (en) * | 2019-06-21 | 2019-11-01 | 上海德惠特种风机有限公司 | A kind of inhibition noise structure for blower |
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