CN204878057U - Fan blade and centrifugal ventilator - Google Patents
Fan blade and centrifugal ventilator Download PDFInfo
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- CN204878057U CN204878057U CN201520633117.3U CN201520633117U CN204878057U CN 204878057 U CN204878057 U CN 204878057U CN 201520633117 U CN201520633117 U CN 201520633117U CN 204878057 U CN204878057 U CN 204878057U
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Abstract
The utility model provides a fan blade, centrifugal fan. The extending direction of the fan blade is consistent with the direction of the rotating center line of the fan blade, the section of the fan blade perpendicular to the extending direction of the fan blade is provided with two opposite side edges, the two side edges are both arc-shaped, the two side edges are respectively provided with a first circle center and a second circle center, the first circle center and the second circle center are positioned at the same side of the fan blade, and the radius of the side edge far away from the first circle center is smaller than that of the side edge close to the first circle center. Use the technical scheme of the utility model, the air current that gets into the wind channel has very strong impact and is close to the trend in the side reason in first centre of a circle, increases its radius, is favorable to making the air current in the wind channel more smooth, is favorable to improving performance, the noise reduction of fan.
Description
Technical field
The utility model relates to art of refrigeration units, in particular to a kind of fan blade, centrifugal blower.
Background technique
At present, due to its structural problem on market, there is energy consumption high, the problem that noise is large.Therefore, a kind of fan blade improving the centrifugal blower of performance, reduction noise and energy consumption is provided to become problem demanding prompt solution in this technical field.
Model utility content
Main purpose of the present utility model is to provide a kind of fan blade, the centrifugal blower that reduce noise, improve fan performance.
To achieve these goals, according to an aspect of the present utility model, provide a kind of fan blade, the bearing of trend of fan blade is consistent with the direction of its rotation centerline, the cross section perpendicular to its bearing of trend of fan blade has two relative side margin, two side margin all in circular arc, two side margin there is first center of circle and second center of circle respectively, first center of circle and second center of circle are positioned at fan blade the same side, and the radius away from the side margin in first center of circle is less than the radius of the side margin near first center of circle.
Further, the end of the rotation centerline of the close fan blade of two side margin is connected by rounded edges.
Further, rounded edges is circular arc.
Further, the radius of the side margin near first center of circle is 1 to 1.2 with the radii ratio away from the side margin in first center of circle.
Further, the radius away from the side margin in first center of circle is 8 ~ 9mm; And/or the radius near the side margin in first center of circle is 8.3 ~ 9.5mm.
Further, the radius ratio of the side margin near first center of circle is away from the large 1 ~ 5mm of radius of the side margin in first center of circle.
Further, side margin away from first center of circle is first side edge, the tangent line of the close rotating center thread end of first side edge and the angle between the radial line of the rotation centerline of this end are α, wherein, and 15 ° of < α <18 °.
Further, side margin away from first center of circle is first side edge, the tangent line away from rotating center thread end of first side edge and the angle between the radial line of the rotation centerline of this end are β, wherein, and 70 ° of < β <75 °.
Further, side margin near first center of circle is second side edge, angle between the radial line of the tangent line of the close rotating center thread end of second side edge and the rotation centerline of this end of process is, wherein, and 13 ° of < γ <16 °.
Further, side margin near first center of circle is second side edge, the tangent line away from rotating center thread end of second side edge and the angle between the radial line of the rotation centerline of this end are δ, wherein, and 60 ° of < δ <65 °.
According to another aspect of the present utility model, provide a kind of centrifugal blower, comprise impeller, impeller comprises retaining ring and the multiple fan blades circumferentially along retaining ring, and fan blade is above-mentioned fan blade, and fan blade extends along the axis of retaining ring.
Application the technical solution of the utility model, the air-flow entering air channel has the trend of very strong impact near the side margin in first center of circle, increases its radius, is conducive to making the air-flow in air channel more smooth, is conducive to the performance, the reduction noise that improve blower fan.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation in the cross section of the impeller of the centrifugal blower of embodiment of the present utility model;
Fig. 2 shows the enlarged view at A place in Fig. 1;
Fig. 3 shows the structural representation of the impeller of the centrifugal blower of embodiment of the present utility model;
Fig. 4 shows the side-looking structural representation of the impeller of the centrifugal blower shown in Fig. 3.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
1, first side edge; 2, second side edge; 3, rounded edges; 4, cylindrical; 5, inner circle; 10, fan blade; 20, retaining ring.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Fan blade of the present utility model can be used for cross flow fan, centrifugal blower etc.The present embodiment is described in detail technological scheme for the multiple wing type centrifugal blower fan with fan blade of the present utility model, those skilled in the art have the ability, when solving relevant art problem, fan blade of the present utility model to be applied to other centrifugal blower and cross flow fan.
Fig. 1 shows the structural representation in the cross section perpendicular to its circumference of the impeller of the centrifugal blower of embodiment of the present utility model; Fig. 2 shows the enlarged view at A place in Fig. 1.
Shown in Fig. 1 and Fig. 2, the impeller of centrifugal blower comprises retaining ring 20 and the multiple fan blades 10 circumferentially along retaining ring 20, fan blade 10 extends along the axis of retaining ring 20, the bearing of trend of fan blade is consistent with the direction of its rotation centerline, the cross section perpendicular to its bearing of trend of fan blade has two relative side margin, two side margin are all in circular arc, and radius is different, and the end of the rotation centerline of the close fan blade of two side margin is connected by rounded edges.
Two side margin 1,2 there is first center of circle and second center of circle respectively, first center of circle and second center of circle are positioned at fan blade 10 the same side, and the radius away from the side margin in first center of circle is less than the radius of side margin near first center of circle.
Fan blade 10 curves to the sense of rotation of impeller, forms the air channel of arc between two adjacent in the circumferential direction of the impeller fan blades 10, and one end of the close impeller central in air channel is entrance point, and in the process of vane rotary, air enters air channel by the entrance point in air channel.
Side margin away from first center of circle is first side edge 1, side margin near first center of circle is second side edge 2, the radius of second side edge 2 is less, the air-flow entering air channel is larger, the air-flow entering air channel has the trend of very strong impact second side edge 2, second side edge 2 is set to radius and is greater than first side edge 1, be conducive to making the air-flow in air channel more smooth, be conducive to the performance, the reduction noise that improve blower fan.
At the entrance point of fan blade, the end of two side margin is connected by rounded edges, is conducive to avoiding the entrance point at fan blade to form eddy current, air is flowed more smooth and easy, effectively can improve the performance of blower fan, reduce noise.
Alternatively, rounded edges is circular arc.Rounded edges also can select the curved line of Diameter Gradual Change or oval camber line.
In the present embodiment, the ratio of the radius of second side edge 2 and the radius of first side edge 1 is 1 to 1.2.
Alternatively, the radius of first side edge 1 is 8 ~ 9mm.The radius of second side edge 2 is 8.3 ~ 9.5mm.Large 1 ~ the 5mm of radius of the radius ratio second side edge of first side edge.
As shown in Figure 3, the radius of the inner circle 5 at the place of one end of the close rotation centerline of fan blade 10 is 30.6 millimeters, and the radius of the cylindrical 4 at the place of one end away from rotation centerline of fan blade 10 is 37 millimeters.
As shown in Figure 2, in the present embodiment, the tangent line of the end of the close entrance point of first side edge 1 and the angle between the radial line of the rotation centerline of this end are α, wherein, and 15 ° of < α <18 °.
The tangent line of the end away from entrance point of first side edge 1 and the angle between the radial line of the rotation centerline of this end are β, wherein, and 70 ° of < β <75 °.
Angle between the radial line of the tangent line of the end of the close entrance point of second side edge 2 and the rotation centerline of this end of process is, wherein, and 13 ° of < γ <16 °.
The tangent line of the end away from entrance point of second side edge 2 and the angle between the radial line of the rotation centerline of this end are δ, wherein, and 60 ° of < δ <65 °.
In the present embodiment, the centrifugal compressor with above-mentioned fan blade 10 can be conducive to the performance, the reduction noise that improve blower fan effectively.Fig. 3 and Fig. 4 shows two air drafting type multi-blade centrifugal fans with above-mentioned fan blade 10, and monolateral fan blade number is 41, and when adopting this kind of blade profile, best fan blade number is 39 ~ 43.
These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (11)
1. a fan blade, it is characterized in that, the bearing of trend of described fan blade is consistent with the direction of its rotation centerline, the cross section perpendicular to its bearing of trend of described fan blade has relative two side margin (1,2), two described side margin are all in circular arc, two described side margin (1,2) there is first center of circle and second center of circle respectively, described first center of circle and described second center of circle are positioned at described fan blade the same side, and the radius away from the described side margin in described first center of circle is less than the radius of the described side margin near described first center of circle.
2. fan blade according to claim 1, is characterized in that, the end of the rotation centerline of the close fan blade of two described side margin (1,2) is connected by rounded edges (3).
3. fan blade according to claim 2, is characterized in that, described rounded edges (3) is in circular arc.
4. fan blade according to claim 1, is characterized in that, the radius of the described described side margin near first center of circle is 1 to 1.2 with the radii ratio away from the described side margin in described first center of circle.
5. fan blade according to claim 1, is characterized in that,
The radius of the described described side margin away from described first center of circle is 8 ~ 9mm; And/or,
The radius of the described described side margin near described first center of circle is 8.3 ~ 9.5mm.
6. fan blade according to claim 5, is characterized in that, the radius ratio of the described side margin near first center of circle is away from the large 1 ~ 5mm of radius of the described side margin in first center of circle.
7. fan blade according to any one of claim 1 to 6, it is characterized in that, described side margin away from described first center of circle is first side edge (1), the tangent line of the close described rotating center thread end of described first side edge (1) and the angle between the radial line of the described rotation centerline of this end are α, wherein, 15 ° of < α <18 °.
8. fan blade according to any one of claim 1 to 6, it is characterized in that, described side margin away from described first center of circle is first side edge (1), the tangent line away from described rotating center thread end of described first side edge (1) and the angle between the radial line of the described rotation centerline of this end are β, wherein, 70 ° of < β <75 °.
9. fan blade according to any one of claim 1 to 6, it is characterized in that, described side margin near described first center of circle is second side edge (2), the tangent line of the close described rotating center thread end of described second side edge (2) and the angle between the radial line of the described rotation centerline of this end are, wherein, 13 ° of < γ <16 °.
10. fan blade according to any one of claim 1 to 6, it is characterized in that, described side margin near described first center of circle is second side edge (2), the tangent line away from described rotating center thread end of described second side edge (2) and the angle between the radial line of the described rotation centerline of this end are δ, wherein, 60 ° of < δ <65 °.
11. 1 kinds of centrifugal blowers, it is characterized in that, comprise impeller, described impeller comprises retaining ring (20) and the multiple fan blades (10) circumferentially along described retaining ring (20), described fan blade (10) fan blade according to any one of claim 1 to 10 (10), described fan blade (10) extends along the axis of described retaining ring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633117.3U CN204878057U (en) | 2015-08-20 | 2015-08-20 | Fan blade and centrifugal ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633117.3U CN204878057U (en) | 2015-08-20 | 2015-08-20 | Fan blade and centrifugal ventilator |
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| Publication Number | Publication Date |
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| CN204878057U true CN204878057U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520633117.3U Active CN204878057U (en) | 2015-08-20 | 2015-08-20 | Fan blade and centrifugal ventilator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020176A (en) * | 2015-08-20 | 2015-11-04 | 珠海格力电器股份有限公司 | Fan blade and centrifugal ventilator |
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- 2015-08-20 CN CN201520633117.3U patent/CN204878057U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020176A (en) * | 2015-08-20 | 2015-11-04 | 珠海格力电器股份有限公司 | Fan blade and centrifugal ventilator |
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