CN207064343U - A kind of blower fan with diffuser guard - Google Patents
A kind of blower fan with diffuser guard Download PDFInfo
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- CN207064343U CN207064343U CN201720900518.XU CN201720900518U CN207064343U CN 207064343 U CN207064343 U CN 207064343U CN 201720900518 U CN201720900518 U CN 201720900518U CN 207064343 U CN207064343 U CN 207064343U
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- diffuser
- diameter
- air duct
- guard
- blower fan
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Abstract
The utility model discloses a kind of blower fan with diffuser guard, including the fan blade being arranged in air duct, the fan blade and motor connection, guard is provided with the top of air duct, the guard lower end is provided with diffuser, the diffuser bottom at the top of air duct with being connected, the diffuser is provided with diffusion angle θ, diffuser bottom has a diameter of D1 opening, there is a diameter of D2 opening, the diffuser bottom opening diameter D1 and diffuser open top diameter D2 has following relation at the top of the diffuser：D1≤D2≤1.5D1, by using said structure, it is not necessary to the effect of noise reduction is realized by increasing increase sound arrester can, and also this is simple in construction, and manufacturing cost is relatively low, applied widely.
Description
Technical field
It the utility model is related to ventilation equipment technical field, more particularly to a kind of blower fan with diffuser guard.
Background technology
The noise of blower fan mainly act on the air-flow for flowing through blower fan as blade and caused pulsating force caused by, pass through
Air-flow is bigger, noise is also bigger, and the power of motor is directly proportional to flowing through the air-flow size of blower fan in blower fan.Therefore,
The noise reduction measure generally used in industry is all by reducing the power of motor of blower fan, reducing air mass flow to realize, thus
The ventilation effect of system can be influenceed, its scope of application is affected.Also a kind of using universal noise reduction measure is exactly in wind
Special acoustic isolation facility is set outside machine, not only increases the manufacturing cost of blower fan, and flow also can be by large effect.
Utility model content
The utility model can effectively reduce noise in view of the shortcomings of the prior art, providing one kind, it is not required that set sound insulation
The blower fan with diffuser guard of facility.
In order to solve the above technical problems, the utility model is addressed by the following technical programs：A kind of band diffuser net
The blower fan of cover, including the fan blade being arranged in air duct, the fan blade and motor connection, guard is provided with the top of air duct, its
It is characterised by, the guard lower end is provided with diffuser, and with being connected at the top of air duct, the diffuser is set for the diffuser bottom
There is diffusion angle θ, diffuser bottom has a diameter of D1 opening, has a diameter of D2 opening at the top of the diffuser, described
Following relation be present in diffuser bottom opening diameter D1 and diffuser open top diameter D2：D1≤D2≤1.5D1.
In such scheme, it is preferred that the diffusion angle θ is 0 °~30 °, by setting different diffusion angles, can not only be changed
Kind noise, moreover it is possible to improve static pressure efficiency.
In such scheme, it is preferred that there is a diameter of D opening at the top of the air duct.
In such scheme, it is preferred that the air duct open top diameter D and diffuser bottom opening diameter D1, which exists, to close
System：D1≥D.
In such scheme, it is preferred that the air duct bottom is provided with the support for fixing motor, is mainly used in motor and sets
It is placed in the axial flow blower of fan blade polycrystalline substance.
In such scheme, it is preferred that the guard cage bar for fixing motor is provided with the top of the air duct, by setting net
Cover cage bar, the resonance of motor operationally can be reduced, further reduce the operation noise of the blower fan.
The beneficial effects of the utility model are compared with prior art：By using said structure, it is not necessary to pass through increase
Increase sound arrester can realizes the effect of noise reduction, and this is simple in construction, and manufacturing cost is relatively low, applied widely.
Brief description of the drawings
Fig. 1, the structural representation of embodiment 1.
Fig. 2, the sectional view 1 of embodiment 1.
Fig. 3, the sectional view 2 of embodiment 1.
Fig. 4, the structural representation of embodiment 2.
Fig. 5, the sectional view 1 of embodiment 2.
Fig. 6, the sectional view 2 of embodiment 2.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.
Embodiment 1：Referring to Fig. 1 to Fig. 3, a kind of blower fan with diffuser guard, including the fan blade 2 being arranged in air duct 1,
The fan blade 2 is connected with motor 3, the top of air duct 1 is provided with guard 4, the lower end of guard 4 is provided with diffuser 5, described
The bottom of diffuser 4 is connected with the top of air duct 1, and the diffuser 4 is provided with diffusion angle θ, and the bottom of diffuser 4 has a diameter of D1's
Opening, the top of diffuser 4 have a diameter of D2 opening, the bottom opening diameter D1 of diffuser 4 and the top of diffuser 4
Following relation be present in opening diameter D2：D1≤D2≤1.5D1, the D1 diameters are chosen for 815 ㎜, and the D2 diameters are chosen for
860㎜。
The diffusion angle θ is 13 °, and the top of air duct 1 has a diameter of D opening, the open top diameter of air duct 1
Relation be present in the D and bottom opening diameter D1 of diffuser 4：D1 >=D, the bottom of air duct 1 are provided with the support for fixing motor 3
31。
By using such scheme, compared with the axial flow blower without diffuser, static pressure efficiency can be promoted to by 31.7%
33.1%, noise is by 71.0 dB (A）It is reduced to 69.6dB (A）.
Embodiment 2：Referring to Fig. 4 to Fig. 6, a kind of blower fan with diffuser guard, including the fan blade 2 being arranged in air duct 1,
The fan blade 2 is connected with motor 3, the top of air duct 1 is provided with guard 4, the lower end of guard 4 is provided with diffuser 5, described
The bottom of diffuser 4 is connected with the top of air duct 1, and the diffuser 4 is provided with diffusion angle θ, and the bottom of diffuser 4 has a diameter of D1's
Opening, the top of diffuser 4 have a diameter of D2 opening, the bottom opening diameter D1 of diffuser 4 and the top of diffuser 4
Following relation be present in opening diameter D2：D1≤D2≤1.5D1, the D1 diameters are chosen for 815 ㎜, and the D2 diameters are chosen for
850㎜。
The diffusion angle θ is 16 °, and the top of air duct 1 has a diameter of D opening, the open top diameter of air duct 1
Relation be present in the D and bottom opening diameter D1 of diffuser 4：D1 >=D, the top of air duct 1 are provided with the guard for fixing motor 3
Cage bar 32.
By using such scheme, compared with the axial flow blower without diffuser, static pressure efficiency can be promoted to by 31.7%
34.3%, noise is by 71.0 dB (A）It is reduced to 67.8dB (A）.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and modification can also be made, these change
Enter and also should be regarded as the scope of protection of the utility model with modification.
Claims (6)
1. a kind of blower fan with diffuser guard, including it is arranged at air duct（1）Interior fan blade（2）, the fan blade（2）With motor
（3）Connection, positioned at air duct（1）Top is provided with guard（4）, it is characterised in that the guard（4）Lower end is provided with diffuser
（5）, the diffuser（4）Bottom and air duct（1）Top connects, the diffuser（4）It is provided with diffusion angle θ, diffuser（4）Bottom
Portion has a diameter of D1 opening, the diffuser（4）Top has a diameter of D2 opening, the diffuser（4）Open bottom
Mouth diameter D1 and diffuser（4）Following relation be present in open top diameter D2：D1≤D2≤1.5D1.
A kind of 2. blower fan with diffuser guard according to claim 1, it is characterised in that the diffusion angle θ be 0 °~
30°。
A kind of 3. blower fan with diffuser guard according to claim 1, it is characterised in that the air duct（1）Top has
There is a diameter of D opening.
A kind of 4. blower fan with diffuser guard according to claim 3, it is characterised in that the air duct（1）Open at top
Mouth diameter D and diffuser（4）Relation be present in bottom opening diameter D1：D1≥D.
A kind of 5. blower fan with diffuser guard according to claim 1, it is characterised in that the air duct（1）Bottom is set
It is equipped with for fixing motor（3）Support（31）.
A kind of 6. blower fan with diffuser guard according to claim 1, it is characterised in that the air duct（1）Top is set
It is equipped with for fixing motor（3）Guard cage bar（32）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720900518.XU CN207064343U (en) | 2017-07-24 | 2017-07-24 | A kind of blower fan with diffuser guard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720900518.XU CN207064343U (en) | 2017-07-24 | 2017-07-24 | A kind of blower fan with diffuser guard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207064343U true CN207064343U (en) | 2018-03-02 |
Family
ID=61517144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720900518.XU Active CN207064343U (en) | 2017-07-24 | 2017-07-24 | A kind of blower fan with diffuser guard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207064343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109879A (en) * | 2021-12-13 | 2022-03-01 | 浙江科贸实业有限公司 | Double-fan integrated ventilator capable of rotating in opposite direction |
-
2017
- 2017-07-24 CN CN201720900518.XU patent/CN207064343U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109879A (en) * | 2021-12-13 | 2022-03-01 | 浙江科贸实业有限公司 | Double-fan integrated ventilator capable of rotating in opposite direction |
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