CN202707621U - Low-noise shrink type volute tongue structure of fan of range hood - Google Patents
Low-noise shrink type volute tongue structure of fan of range hood Download PDFInfo
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- CN202707621U CN202707621U CN 201220347791 CN201220347791U CN202707621U CN 202707621 U CN202707621 U CN 202707621U CN 201220347791 CN201220347791 CN 201220347791 CN 201220347791 U CN201220347791 U CN 201220347791U CN 202707621 U CN202707621 U CN 202707621U
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- snail tongue
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- tongue
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Abstract
The utility model discloses a low-noise shrink type volute tongue structure of a fan of a range hood. The volute tongue structure comprises a fan volute plate, an air passage is arranged on the volute plate, the upper edge of the air passage forms a volute tongue, an upper end angle and a lower end angle of a section of the tongue are in a circular arc shape, and the circular arc of the upper end angle of the section of the tongue and the circular arc of the lower end angle of the section of the tongue are connected with each other through a common tangent of the two circular arcs. The volute tongue structure is simple in structure, convenient to manufacture and capable of effectively reducing noises of the fan and improving comfort of domestic environments on the premise that the fan efficiencies are guaranteed .
Description
Technical field
The utility model relates to a kind of low noise contraction snail tongue structure of lampblack exhauster blower fan.
Background technique
Lampblack exhauster is as household appliances, and its noise is the index of a key.Blower fan is the core of lampblack exhauster, generally adopts multiple wing forward centrifugal blower fan, and its noise is about 60Db.Although this type of fan noise is very low, people are pursuing lower noise, more comfortable domestic environment always as research direction.Often when taking into account efficient and low noise, reducing noise, improving domestic environment and be placed on prior position.
Fan noise mainly comprises rotational noise, eddy current crack and electromagnetic noise, wherein take rotational noise as main.As shown in Figure 1, be provided with impeller 2 in the snail plate 1 of general lampblack exhauster blower fan, along being provided with snail tongue 3, rotational noise is when crossing the snail tongue 3 of snail plate 1 by the vanes of impeller 2 on the air channel 4 of snail plate 1, and gas pressure and flow velocity periodically pulsing produce.Traditional snail tongue 3 is designed to a simple single arc structure, snail tongue 3 distances, and namely the distance between snail tongue 3 and the impeller 2 is larger, and fan efficiency is lower, noise is less; Otherwise fan efficiency is higher, noise is also larger.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of low noise contraction snail tongue structure of lampblack exhauster blower fan, this snail tongue structure is simple, easy to make, under the prerequisite that guarantees fan efficiency, effectively reduce the noise of blower fan, improved the travelling comfort of domestic environment.
For solving the problems of the technologies described above, the low noise contraction snail tongue structure of the utility model lampblack exhauster blower fan comprises blower fan snail plate, described snail plate is provided with the air channel, the upper edge in described air channel forms the snail tongue, upper corners and the angle, lower end in described snail tongue cross section are circular arc, and the common tangent by two circular arcs between described snail tongue cross section upper corners circular arc and angle, the lower end circular arc is connected.
Further, above-mentioned snail tongue cross section upper corners circular arc arc diameter is greater than angle, lower end circular arc arc diameter.
Because the low noise contraction snail tongue structure of the utility model lampblack exhauster blower fan has adopted technique scheme, be that this snail tongue structure comprises blower fan snail plate, the snail plate is provided with the air channel, the upper edge in air channel forms the snail tongue, the upper corners in snail tongue cross section and angle, lower end are circular arc, and the common tangent by two circular arcs between snail tongue cross section upper corners circular arc and angle, the lower end circular arc is connected.This snail tongue structure is simple, easy to make, under the prerequisite that guarantees fan efficiency, effectively reduces the noise of blower fan, has improved the travelling comfort of domestic environment.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the schematic representation of conventional fan snail tongue structure;
Fig. 2 is the schematic representation of the low noise contraction snail tongue structure of the utility model lampblack exhauster blower fan.
Embodiment
As shown in Figure 2, the low noise contraction snail tongue structure of the utility model lampblack exhauster blower fan comprises blower fan snail plate 1, described snail plate 1 is provided with air channel 4, the upper edge in described air channel 4 forms snail tongue 3, upper corners 31 and the angle, lower end 32 in described snail tongue 3 cross sections are circular arc, and the common tangent by two circular arcs between described snail tongue 3 cross section upper corners 31 circular arcs and angle, lower end 32 circular arcs is connected.
Further, above-mentioned snail tongue 3 cross section upper corners 31 circular arc arc diameters are greater than angle, lower end 32 circular arc arc diameters.
This snail tongue structure adopts the common tangent between two sections circular arcs and the two sections circular arcs to connect, the basic circular arc with traditional snail tongue of the circular arc of snail tongue upper end is consistent, guaranteed the efficient of blower fan, and the circular arc of snail hypogloeeis end has increased the spacing of snail tongue and impeller, thereby reduced the noise of fan operation, reached the purpose of taking into account fan efficiency and fan noise.Through practical application, adopt the blower fan of this snail tongue structure, its noise can reduce 2Db, and this is for the blower fan of original 60Db low noise, and effect is very obvious.
Claims (2)
1. the low noise contraction snail tongue structure of a lampblack exhauster blower fan, comprise blower fan snail plate, described snail plate is provided with the air channel, the upper edge in described air channel forms the snail tongue, it is characterized in that: upper corners and the angle, lower end in described snail tongue cross section are circular arc, and the common tangent by two circular arcs between described snail tongue cross section upper corners circular arc and angle, the lower end circular arc is connected.
2. the low noise contraction snail tongue structure of lampblack exhauster blower fan according to claim 1, it is characterized in that: described snail tongue cross section upper corners circular arc arc diameter is greater than angle, lower end circular arc arc diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347791 CN202707621U (en) | 2012-07-18 | 2012-07-18 | Low-noise shrink type volute tongue structure of fan of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347791 CN202707621U (en) | 2012-07-18 | 2012-07-18 | Low-noise shrink type volute tongue structure of fan of range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707621U true CN202707621U (en) | 2013-01-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220347791 Expired - Fee Related CN202707621U (en) | 2012-07-18 | 2012-07-18 | Low-noise shrink type volute tongue structure of fan of range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047895A (en) * | 2014-06-23 | 2014-09-17 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
-
2012
- 2012-07-18 CN CN 201220347791 patent/CN202707621U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047895A (en) * | 2014-06-23 | 2014-09-17 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
| CN104047895B (en) * | 2014-06-23 | 2017-02-08 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20160718 |