CN205876763U - Muting draught fan structure - Google Patents
Muting draught fan structure Download PDFInfo
- Publication number
- CN205876763U CN205876763U CN201620757709.0U CN201620757709U CN205876763U CN 205876763 U CN205876763 U CN 205876763U CN 201620757709 U CN201620757709 U CN 201620757709U CN 205876763 U CN205876763 U CN 205876763U
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- CN
- China
- Prior art keywords
- spiral case
- air
- diffuser
- snail tongue
- wind wheel
- 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.)
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Abstract
The utility model provides a muting draught fan structure, including quick -witted case, air intake, air outlet, spiral case, wind wheel and motor, air outlet size <= air intake size, the spiral case is including import base circle, spiral case molded lines, diffuser and snail tongue, and the diffuser is along the expansion of spiral case direction of rotation, the angle of flare a=6 of diffuser~8, the diameter of import base circle be D, snail tongue radius r= (0.025~0.05) D, snail tongue and imported base circle apart from k= (0.04~0.1) D. The wind speed of giving vent to anger is more than or equal to the wind speed that admits air, has sufficient air input to be supplied to the wind wheel, avoids causing the vacuum to produce the noise, the angle of flare of diffuser can reduce the air outlet air speed, converts partial kinetic energy to static pressure value, simultaneously, from the air current frequency of wind wheel entering expander entry and the difference in frequency of expander entering air outlet, avoid the air current to form resonance in the expander, produce the noise, R, k value are when this within range, and the noise of fan is less and fan efficiency is higher.
Description
Technical field
This utility model relates to centrifugal blower noise elimination technique field, specifically refers to a kind of quiet centrifugal wind without quieter material
Machine structure.
Background technology
Existing box-type centrifugal fan is mainly made up of casing, spiral case, wind wheel, air inlet, air outlet and motor, its knot
Structure is to arrange impeller in spiral case, and arranges casing outside spiral case, and casing is provided with air inlet and air outlet；If the outer nothing of spiral case
If noise reducing apparatus, its noise is relatively big, and owing to casing reduces the limited in one's ability of noise, therefore generally by installing acoustic filter knot
The mode of structure or filling deadener is to reduce noise, and this mode makes blower fan structure complex, or relatively costly；Separately
On the one hand, due to centrifugal fan structure design unreasonable so that fan efficiency is relatively low.
Utility model content
The purpose of this utility model is to provide a kind of quiet blower fan structure, and this blower fan is good without quieter material, muting function
And fan efficiency is higher.
For achieving the above object, the technical scheme that this utility model is used is:
A kind of quiet blower fan structure, air inlet and the air outlet including cabinet, being respectively arranged on described cabinet two ends, is located at institute
State the spiral case in cabinet, the wind wheel being located in described spiral case and drive the motor of described wind wheel, described air outlet a size of d,
Described air inlet a size of d1, d≤d1；Described spiral case includes import basic circle, spiral case inlet pressure, diffuser and snail tongue, described diffusion
Device is expanded along described spiral case direction of rotation, angle of flare a=6 ° ~ 8 ° of described diffuser；A diameter of D of described import basic circle, institute
State snail tongue radius r=(0.025 ~ 0.05) D, described snail tongue and distance k=(0.04 ~ 0.1 of described import basic circle) D.
A kind of optimal way, described snail tongue radius r=0.05D, described snail tongue and distance k=of described import basic circle
0.0625D。
A kind of optimal way, angle of flare a=6 ° of described diffuser.
A kind of optimal way, the blade material hardness of described wind wheel is less than the material hardness of described spiral case.Further, described
The blade of wind wheel is aluminium, and described spiral case is galvanized sheet.
A kind of optimal way, described motor is direct-connected or external rotor electric machine.
The beneficial effects of the utility model are: 1, d≤d1 so that wind speed of giving vent to anger is more than or equal to air inlet wind speed, have enough
Air inflow be supplied to wind wheel, it is to avoid cause vacuum produce noise；2, the angle of flare of diffuser can reduce air outlet air velocity,
Part kinetic energy is converted into static pressure；Meanwhile, the air-flow frequency entering dilator entrance from wind wheel enters air outlet with dilator
Frequency different, it is to avoid air-flow forms resonance, generation noise in dilator；3, with reference to the data recorded in following table, import base
Diameter of a circle is D, snail tongue radius r=(0.025 ~ 0.05) D, distance k=(0.04 ~ 0.1 of snail tongue and import basic circle) D time, blower fan
Noise less and fan efficiency is higher.
Accompanying drawing explanation
With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is blower fan structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is further described:
A kind of quiet blower fan structure, the air inlet 11 including cabinet 1, being respectively arranged on described cabinet 1 two ends and air outlet 12,
It is located at the spiral case 2 in described cabinet 1, the wind wheel 3 being located in described spiral case 2 and drives the motor of described wind wheel 3.
Described air outlet 12 a size of d, described air inlet 11 a size of d1, d≤d1.The wind speed that makes to give vent to anger is more than or equal to
Air inlet wind speed, has enough air inflows to be supplied to wind wheel 3, it is to avoid cause vacuum to produce noise.
Described spiral case 2 includes import basic circle 21, spiral case inlet pressure 22, diffuser 23 and snail tongue 24, described diffuser 23 along
Described spiral case 24 direction of rotation is expanded, angle of flare a=6 ° ~ 8 ° of described diffuser 23, preferably a=6 °.The expansion of diffuser 23
Angle can reduce air outlet 11 air velocity, and part kinetic energy is converted into static pressure；Meanwhile, dilator 23 entrance is entered from wind wheel 3
Air-flow frequency different from the frequency that dilator 23 enters air outlet 12, it is to avoid air-flow forms resonance in dilator 23, produce
Noise.
A diameter of D of described import basic circle 21, described snail tongue 24 radius r=(0.025 ~ 0.05) D, described snail tongue 24 and institute
State distance k=(0.04 ~ 0.1 of import basic circle 21) D；Optimal way is: described snail tongue 24 radius r=0.05D, described snail tongue 24 with
Distance k=0.0625D of described import basic circle 21.With reference to surveyed data in list below, r, k value within the range time, blower fan
Noise is less and fan efficiency is higher.
The blade material hardness of described wind wheel 3 is less than the material hardness of described spiral case 2；Further, the blade of described wind wheel 3
For aluminium, described spiral case 3 is galvanized sheet.Owing to both materials are different, the frequency of impact that blade and spiral case 3 are produced by air-flow is each not
Identical, resonance effect will not be produced.
Described motor is direct-connected or external rotor electric machine.Reduce the secondary noise that multiple connection member produces.
This most novel technical scope is not imposed any restrictions by the above, all according to this utility model technical spirit to
On embodiment any amendment, equivalent variations and the modification made, all still fall within the range of this most novel technical scheme.
Claims (6)
1. a quiet blower fan structure, air inlet and the air outlet including cabinet, being respectively arranged on described cabinet two ends, be located at described
Spiral case in cabinet, the wind wheel being located in described spiral case and drive the motor of described wind wheel, it is characterised in that: described air-out
Mouth a size of d, described air inlet a size of d1, d≤d1；Described spiral case includes import basic circle, spiral case inlet pressure, diffuser and snail
Tongue, described diffuser expands along described spiral case direction of rotation, angle of flare a=6 ° ~ 8 ° of described diffuser；Described import basic circle
A diameter of D, described snail tongue radius r=(0.025 ~ 0.05) D, distance k=(0.04 of described snail tongue and described import basic circle ~
0.1) D.
The quiet blower fan structure of one the most according to claim 1, it is characterised in that described snail tongue radius r=0.05D, described
Snail tongue and distance k=0.0625D of described import basic circle.
The quiet blower fan structure of one the most according to claim 1 and 2, it is characterised in that angle of flare a=of described diffuser
6°。
The quiet blower fan structure of one the most according to claim 1 and 2, it is characterised in that the blade material of described wind wheel is hard
Degree is less than the material hardness of described spiral case.
The quiet blower fan structure of one the most according to claim 4, it is characterised in that the blade of described wind wheel is aluminium, institute
Stating spiral case is galvanized sheet.
The quiet blower fan structure of one the most according to claim 1 and 2, it is characterised in that described motor is direct-connected or outer
Rotor electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620757709.0U CN205876763U (en) | 2016-07-19 | 2016-07-19 | Muting draught fan structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620757709.0U CN205876763U (en) | 2016-07-19 | 2016-07-19 | Muting draught fan structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205876763U true CN205876763U (en) | 2017-01-11 |
Family
ID=57696681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620757709.0U Expired - Fee Related CN205876763U (en) | 2016-07-19 | 2016-07-19 | Muting draught fan structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205876763U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
-
2016
- 2016-07-19 CN CN201620757709.0U patent/CN205876763U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20180719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |