CN2179924Y - Low-noise centrifugal fan - Google Patents
Low-noise centrifugal fan Download PDFInfo
- Publication number
- CN2179924Y CN2179924Y CN 93246567 CN93246567U CN2179924Y CN 2179924 Y CN2179924 Y CN 2179924Y CN 93246567 CN93246567 CN 93246567 CN 93246567 U CN93246567 U CN 93246567U CN 2179924 Y CN2179924 Y CN 2179924Y
- Authority
- CN
- China
- Prior art keywords
- impeller
- noise
- diameter
- spiral case
- impeller 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.)
- Expired - Fee Related
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Abstract
The utility model provides a low-noise centrifugal fan. The structural characteristic is that an impeller wheel is adjacent to a spiral inlet, the distance between both parties is within the range of the impeller wheel diameter of 0.08-0.1; two upright posts connected with both side walls of a spiral case (1) are symmetrically arranged on a flow channel on the other side of the impeller wheel along the axle direction vertical plane; the distance between two upright posts is the diameter of the impeller wheel of 0.25-0.30. The improvement can reduce the circular flow generated by a part of gas in the spiral case, increases the stiffness of the spiral case, and blocks the communication of noise, which is advantageous to reducing the generation of noise. The utility model also has the advantages of simple structure and easy manufacture, suitable to use in situation of much dust.
Description
The utility model belongs to improved centrifugal fan, particularly a kind of low-noise centrifugal formula blower fan.
The snail tongue of centrifugal fan is the one of the main reasons that produces noise and vibration with the interaction of the air-flow that circulates from impeller.The way that existing centrifugal fan once adopted the edge of snail tongue to tilt with respect to trailing edge, but sound effective value and obvious is fallen.Also having a kind of way is that snail tongue silencing apparatus is installed, and can obtain certain effect, but for using under the bigger situation of dust loading, as aspirating rubbish and taking out dust, its perforated plate folding aperture is blocked easily, loses the noise elimination effect very soon.
The purpose of this utility model is to overcome the deficiency of prior art, provides simple in structure, can be suitable for the low-noise centrifugal formula blower fan that uses under the more occasion of dust.
Above-mentionedly realize by this way: as shown in Figure 1, this blower fan includes spiral case (1), main shaft (2) and impeller (3), but done such improvement: dwindle the distance between impeller (3) and the snail tongue (4), snail tongue (4) end and impeller (3) apart from t with 0.08～0.1 impeller (3) diameter for well, vertical plane is symmetrical arranged two columns (5) that link with spiral case (1) two side vertically on the flow channel of impeller (3) another side, and the distance of two columns (5) is 0.25～0.30 impeller (3) diameter.
Fig. 1 is the utility model internal structure schematic representation.
After above-mentioned improvement, because impeller (3) is close toward snail tongue (4) direction, the degree of opening of helical air-flow path is increased, gas flow is more suitable, avoids portion gas to produce in spiral case (1) and circulates, and has reduced generating noise; In addition, set up column (5) and can play following two effects afterwards: the first has strengthened the rigidity of spiral case (1), increased the natural frequency of spiral case (1), make impeller (3) in rotary course, trigger the vibration weakening of spiral case (1) itself, reduce generating noise, it two is that the noise that air-flow is produced is hindered, form discrete state, and make the part sound energy reflection give sound source, and stop propagation of noise, also help reducing noise, through evidence, therefore noise can reduce by 40～50%, and the utility model is compared with existing centrifugal exhauster, can reduce noise, and it is relatively simple for structure, make easily, and be suitable at dust morely, use under the occasion as suction rubbish.
When implementing the utility model, the radius of arc of snail tongue (4) the tip of the tongue is unsuitable excessive, is suitable to be controlled at 0.03～0.045 impeller (3) diameter.For well, its diameter preferably is controlled at 0.05～0.08 impeller (3) diameter for well to column (5) with cylindrical.
Claims (3)
1, a kind of low-noise centrifugal formula blower fan, include spiral case (1), main shaft (2) and impeller (3), it is characterized in that dwindling the distance between impeller (3) and the snail tongue (4), snail tongue (4) end and impeller (3) apart from t with 0.08～0.1 impeller (3) diameter for well, vertical plane is symmetrical arranged two columns (5) that link with spiral case (1) two side vertically on the flow channel of impeller (3) another side, and the distance of two columns (5) is 0.25～0.30 impeller (3) diameter.
2, centrifugal fan according to claim 1, the radius of arc that it is characterized in that snail tongue (4) the tip of the tongue is suitable with 0.03～0.045 impeller (3) diameter.
3, centrifugal fan according to claim 1, it is characterized in that column (5) with cylindrical for well, its diameter is 0.05～0.08 impeller (a 3) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246567 CN2179924Y (en) | 1993-12-29 | 1993-12-29 | Low-noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246567 CN2179924Y (en) | 1993-12-29 | 1993-12-29 | Low-noise centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2179924Y true CN2179924Y (en) | 1994-10-19 |
Family
ID=33819223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93246567 Expired - Fee Related CN2179924Y (en) | 1993-12-29 | 1993-12-29 | Low-noise centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2179924Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438486A (en) * | 2016-11-23 | 2017-02-22 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor unit |
| CN106523434A (en) * | 2016-11-23 | 2017-03-22 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor machine |
-
1993
- 1993-12-29 CN CN 93246567 patent/CN2179924Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438486A (en) * | 2016-11-23 | 2017-02-22 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor unit |
| CN106523434A (en) * | 2016-11-23 | 2017-03-22 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor machine |
| CN106438486B (en) * | 2016-11-23 | 2020-01-17 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor unit |
| CN106523434B (en) * | 2016-11-23 | 2020-02-28 | 青岛海尔空调电子有限公司 | Centrifugal fan volute and indoor unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |