CN202520657U - Double-volute-tongue fan - Google Patents
Double-volute-tongue fan Download PDFInfo
- Publication number
- CN202520657U CN202520657U CN2012201266738U CN201220126673U CN202520657U CN 202520657 U CN202520657 U CN 202520657U CN 2012201266738 U CN2012201266738 U CN 2012201266738U CN 201220126673 U CN201220126673 U CN 201220126673U CN 202520657 U CN202520657 U CN 202520657U
- Authority
- CN
- China
- Prior art keywords
- snail tongue
- arc
- tongue
- exhaust outlet
- blower fan
- 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 double-volute-tongue fan, which belongs to the technical field of fans and is used for solving the problems of low wind pressure, high noise and the like existing in the conventional fan. In the double-volute-tongue fan, an air inlet and an air outlet are formed on a shell; an impeller is arranged in the shell, and is driven by using a motor; the lower side of the inner wall of the air outlet extends upwards, and is provided with a double-volute-tongue mechanism; and the specific structure of the double-volte-tongue mechanism is that: a first volute tongue is formed on a turned edge on the upper part of an arc-shaped plate, and a noise reducing structure is arranged on the middle part of the arc-shaped plate. The double-volute-tongue fan has the advantages of high wind pressure, low noise, simple structure and high practicability.
Description
Technical field
The utility model belongs to the blower fan technical field, refers in particular to a kind of pair of snail tongue blower fan.
Background technique
At present; Existing scroll casing type blower fan adopts the single spiral tougue structure usually, because the gap between snail tongue and the impeller is all influential to performance and noise, its excesssive gap blast can reduce; Therefore the too small then noise in gap can raise, and exists blast, noise can't reach problems such as good effect.
Summary of the invention
The purpose of the utility model has provided two snail tongue blower fans that a kind of blast is big, noise reduction effect is good.
The purpose of the utility model is achieved in that a kind of pair of snail tongue blower fan; Casing is provided with intake grill and exhaust outlet; Be provided with impeller in the casing; Described impeller is characterized in that by motor driving: the inwall downside of described exhaust outlet extends upward and is provided with two snail tongue mechanisms, and the concrete structure of described pair of snail tongue mechanism is: crimping forms the first snail tongue outside the top of an arc plate, the middle part is provided with denoising structure.
The utility model is through being positioned at the denoising structure of exhaust outlet, can effectively reduce the aerodynamic noise that air-flow produces in the working procedure of blower fan, strengthened the blast of blower fan air-out simultaneously through the first snail tongue.
In a kind of pair of above-mentioned snail tongue blower fan, the described first snail tongue is towards the outside curve of exhaust outlet, and its cross section is an arc body, and arc length is the arc greater than semicircle.
In a kind of pair of above-mentioned snail tongue blower fan, described denoising structure is that the more than one groove that axially is provided with forms.
In a kind of pair of above-mentioned snail tongue blower fan, described groove forms the second snail tongue to the outside curve of exhaust outlet, and its cross section is an arc body, and arc length is the arc less than semicircle.
In a kind of pair of above-mentioned snail tongue blower fan, the described pair of snail tongue mechanism be welded on the inwall downside of exhaust outlet or with one-body molded on the downside inwall of exhaust outlet.
The utility model is compared the outstanding and beneficial technical effects of existing technology:
1, the utility model can reduce air leak rate of air curtain through two snail tongue structures, promotes the pressure of blower fan.
2, the utility model is provided with noise reducing mechanism, can effectively reduce the aerodynamic noise of blower fan, has reduced its noise pollution to environment.
3, the utility model is simple in structure, and is practical.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1:
A kind of pair of snail tongue blower fan; Casing 1 is provided with intake grill and exhaust outlet 2; Be provided with impeller 3 in the casing 1, described impeller 3 is characterized in that by motor driving: the inwall downside of described exhaust outlet 2 extends upward and is provided with two snail tongue mechanisms; The concrete structure of described pair of snail tongue mechanism is: crimping forms the first snail tongue 5 outside the top of an arc plate, the middle part is provided with denoising structure; The utility model is through being positioned at the denoising structure of exhaust outlet 2, can effectively reduce the aerodynamic noise that air-flow produces in the working procedure of blower fan, strengthened the blast of blower fan air-out simultaneously through the first snail tongue 5.
In the outside curve of the first above-mentioned snail tongue 5 towards exhaust outlet 2, its cross section is an arc body, and arc length is the arc greater than semicircle.
At above-mentioned denoising structure is that the more than one groove that axially is provided with forms.
Form the second snail tongue 4 at above-mentioned groove to the outside curve of exhaust outlet 2, its cross section is an arc body, and arc length is the arc less than semicircle.
Form the second snail tongue 4 at above-mentioned groove to the outside curve of exhaust outlet 2, its cross section is an arc body, and arc length is the arc less than semicircle.
The foregoing description is merely the preferred embodiment of the utility model, is not the protection domain that limits the utility model according to this, so: the equivalence that all structures according to the utility model, shape, principle are done changes, and all should be covered by within the protection domain of the utility model.
Claims (5)
1. two snail tongue blower fan; Casing (1) is provided with intake grill and exhaust outlet (2); Be provided with impeller (3) in the casing (1); Described impeller (3) is characterized in that by motor driving: the inwall downside of described exhaust outlet (2) extends upward and is provided with two snail tongue mechanisms, and the concrete structure of described pair of snail tongue mechanism is: crimping forms the first snail tongue (5) outside the top of an arc plate, the middle part is provided with denoising structure.
2. a kind of pair of snail tongue blower fan according to claim 1 is characterized in that: the described first snail tongue (5) is towards the outside curve of exhaust outlet (2), and its cross section is an arc body, and arc length is the arc greater than semicircle.
3. a kind of pair of snail tongue blower fan according to claim 1 is characterized in that: described denoising structure forms for the more than one groove that axially is provided with.
4. a kind of pair of snail tongue blower fan according to claim 3 is characterized in that: described groove forms the second snail tongue (4) to the outside curve of exhaust outlet (2), and its cross section is an arc body, and arc length is the arc less than semicircle.
5. according to each described a kind of pair of snail tongue blower fan of claim 1-4, it is characterized in that: the described pair of snail tongue mechanism be welded on the inwall downside of exhaust outlet (2) or with one-body molded on the downside inwall of exhaust outlet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201266738U CN202520657U (en) | 2012-03-29 | 2012-03-29 | Double-volute-tongue fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201266738U CN202520657U (en) | 2012-03-29 | 2012-03-29 | Double-volute-tongue fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520657U true CN202520657U (en) | 2012-11-07 |
Family
ID=47103609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201266738U Expired - Fee Related CN202520657U (en) | 2012-03-29 | 2012-03-29 | Double-volute-tongue fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520657U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257598A (en) * | 2015-11-16 | 2016-01-20 | 上海林内有限公司 | Volute casing of fan with oblique ladder volute tongue |
| CN109424586A (en) * | 2017-08-31 | 2019-03-05 | 宁波方太厨具有限公司 | A kind of volute tongue structure for radial fan |
| WO2020233471A1 (en) * | 2019-05-23 | 2020-11-26 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothing dryer |
-
2012
- 2012-03-29 CN CN2012201266738U patent/CN202520657U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257598A (en) * | 2015-11-16 | 2016-01-20 | 上海林内有限公司 | Volute casing of fan with oblique ladder volute tongue |
| CN109424586A (en) * | 2017-08-31 | 2019-03-05 | 宁波方太厨具有限公司 | A kind of volute tongue structure for radial fan |
| CN109424586B (en) * | 2017-08-31 | 2024-01-16 | 宁波方太厨具有限公司 | Volute tongue structure for radial flow fan |
| WO2020233471A1 (en) * | 2019-05-23 | 2020-11-26 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothing dryer |
| US11808280B2 (en) | 2019-05-23 | 2023-11-07 | Qingdao Haier Drum Washing Machine Co., Ltd. | Centrifugal fan and clothing dryer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20160329 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |