CN104154035A - Centrifugal fan and air conditioner with same - Google Patents
Centrifugal fan and air conditioner with same Download PDFInfo
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- CN104154035A CN104154035A CN201410439044.4A CN201410439044A CN104154035A CN 104154035 A CN104154035 A CN 104154035A CN 201410439044 A CN201410439044 A CN 201410439044A CN 104154035 A CN104154035 A CN 104154035A
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- end points
- centrifugal fan
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Abstract
The invention provides a centrifugal fan and an air conditioner with the centrifugal fan. The centrifugal fan comprises a hub (10), a base plate (20) and multiple vanes (30), wherein the base plate (20) is arranged on the hub (10) in a sleeved mode, and the multiple vanes (30) are arranged on the base plate (20) and are located on the outer side of the hub (10) in the circumferential direction. Each vane (30) comprises an edge section which is far away from the hub (10) and extends out of the base plate (20), wherein the edge section comprises a first surface (31) and a second surface (32) which is opposite to the first surface (31), a backpressure surface is formed by the first surface (31), a pressure surface is formed by the second surface (32), and the first surface (31) is provided with a first concave-convex structure used for weakening an eddy. By the adoption of the centrifugal fan, the problem that in the prior art, a centrifugal fan is high in noise is solved.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of centrifugal fan and there is its air conditioner.
Background technique
In recent years, along with the pursuit of people to quality of the life, user is higher to the noise requirements of air-conditioning system, particularly room conditioning ventilation field.Blower fan is the unique air interchanger in air conditioner ventilation equipment, and blower fan is being realized the generation of the simultaneous aerodynamic noise of Conversion of Energy.Main noise source in blower fan system is aerodynamic noise.Centrifugal fan is a kind of in blower fan, and the working principle of centrifugal fan is: air-flow is from the axial suction of centrifugal fan, and under centrifugal effect, air-flow is from the radially outflow of centrifugal fan.In prior art, as shown in Figure 1, centrifugal fan comprises wheel hub 1, chassis 2, a plurality of blade 3 and panel 4, and chassis 2 is set on wheel hub 1, and a plurality of blades 3 are arranged on chassis 2, and cover plate 4 lids are located on a plurality of blades 3, and cover plate 4 has air inlet through hollow shaft mouth.Blade 3 comprises first surface and the second surface being oppositely arranged with first surface, and first surface forms back pressure face, second surface mineralization pressure face.When blade High Rotation Speed, viscous effect due to gas, speed at the surperficial air-flow of blade is 0, within the scope of blade very small distance, air velocity gradient is very large, in the back pressure face of blade, easily forms boundary layer eddy current, when eddy current comes off blade, can produce noise, eddy current crack on blade is large, and then causes the noise of centrifugal fan large.
Summary of the invention
The present invention aims to provide a kind of centrifugal fan and has its air conditioner, to solve the large problem of the noise of centrifugal fan in prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of centrifugal fan, having comprised: wheel hub; Chassis, is set on wheel hub; Blade, for a plurality of, a plurality of blades are arranged on chassis and along being circumferentially arranged on the outside of wheel hub; Blade comprises away from wheel hub and stretches out the edge section on chassis, edge section comprises first surface and the second surface being oppositely arranged with first surface, and first surface forms back pressure face, second surface mineralization pressure face, wherein, on first surface, have for weakening the first concaveconvex structure of eddy current.
Further, the first concaveconvex structure comprises the first concave-arc part and the first convex arc part being connected, and all extend along the bearing of trend of blade the first concave-arc part and the first convex arc part, and the first convex arc part arranges away from chassis with respect to the first concave-arc part.
Further, on second surface, there is the second concaveconvex structure.
Further, the second concaveconvex structure comprises the second concave-arc part and the second convex arc part being connected, all extend along the bearing of trend of blade the second concave-arc part and the second convex arc part, the second concave-arc part and the first corresponding setting in convex arc part, the second convex arc part and the corresponding setting of the first concave-arc part.
Further, the sectional shape of edge section is S shape.
Further, first surface has A end points, B end points, C end points and D end points, B end points is positioned in the plane parallel with the surface on chassis with C end points, A end points subpoint is in the plane P point, D end points subpoint is in the plane C end points, and the angle of the line between the line between P point and C end points and B end points and C end points is edge section tilt angle
edge section tilt angle
in the scope of 1 ° to 10 °.
Further, two end points of the treble bearing of trend along blade of the first convex arc part on first surface are E end points and F end points, subpoint in the plane that E end points limits at A end points, B end points and F end points is G point, the angle of the line between the line between G point and F end points and E end points and F end points is to adjust angle θ, adjusts angle θ in the scope of 0.5 ° to 5 °.
Further, centrifugal fan also comprises that lid is located at the cover plate on a plurality of blades, and cover plate has air inlet through hollow shaft mouth.
According to a further aspect in the invention, provide a kind of air conditioner, comprised centrifugal fan, centrifugal fan is above-mentioned centrifugal fan.
Apply technological scheme of the present invention, centrifugal fan comprises wheel hub, chassis and blade, and base plate cover is located on wheel hub, and blade is a plurality of, and a plurality of blades are arranged on chassis and along being circumferentially arranged on the outside of wheel hub.Air-flow is from the axial suction of centrifugal fan, and under the rotation situation of wheel hub, air-flow flows out the space between two adjacent blades.Said structure can guarantee the normal operation of centrifugal fan.During centrifugal fan work, under the effect of different airflow directions, the back pressure face generation boundary layer at blade, produces eddy current, then produces eddy current break-off.Blade comprises away from wheel hub and stretches out the edge section on chassis, edge section comprises first surface and the second surface being oppositely arranged with first surface, and first surface forms back pressure face, second surface mineralization pressure face, wherein, on first surface, have for weakening the first concaveconvex structure of eddy current.Due to the protuberance structure of the first concaveconvex structure and the principle of peripheral flow similar, protuberance structure can affect the generation of eddy current.Such the first concaveconvex structure can be controlled the flow direction of the air-flow of back pressure face, and then the recess of the first concaveconvex structure can controlled vortex flow disengaging, thereby the noise that the boundary layer eddy current of controlling back pressure face comes off, effectively reduce eddy current crack, and then reduce the rotational noise of centrifugal fan and the noise total value of centrifugal fan.
Accompanying drawing explanation
The Figure of description that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the perspective view of centrifugal fan of the prior art;
Fig. 2 shows according to the embodiment's of centrifugal fan of the present invention perspective view;
Fig. 3 shows the part-structure schematic diagram of the centrifugal fan of Fig. 2; And
Fig. 4 shows the structural representation of edge section of blade of the centrifugal fan of Fig. 2.
Above-mentioned accompanying drawing comprises the following drawings mark:
1, wheel hub; 2, chassis; 3, blade; 4, cover plate; 10, wheel hub; 20, chassis; 30, blade; 31, first surface; 32, second surface; 40, cover plate.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
As shown in Figures 2 and 3, the centrifugal fan of the present embodiment comprises wheel hub 10, chassis 20 and blade 30, chassis 20 is set on wheel hub 10, blade 30 is a plurality of, a plurality of blades 30 are arranged on chassis 20 and along being circumferentially arranged on the outside of wheel hub 10, blade 30 comprises away from wheel hub 10 and stretches out the edge section on chassis 20, edge section comprises first surface 31 and the second surface 32 being oppositely arranged with first surface 31, first surface 31 forms back pressure face, second surface 32 mineralization pressure faces, wherein, on first surface 31, have for weakening the first concaveconvex structure of eddy current.
The centrifugal fan of application the present embodiment, centrifugal fan comprises wheel hub 10, chassis 20 and blade 30, and chassis 20 is set on wheel hub 10, and blade 30 is a plurality of, and a plurality of blades 30 are arranged on chassis 20 and along being circumferentially arranged on the outside of wheel hub 10.Air-flow is from the axial suction of centrifugal fan, and under the rotation situation of wheel hub 10, air-flow flows out the space between two adjacent blades 30.Said structure can guarantee the normal operation of centrifugal fan.During centrifugal fan work, under the effect of different airflow directions, the back pressure face generation boundary layer at blade 30, produces eddy current, then produces eddy current break-off.Blade 30 comprises away from wheel hub 10 and stretches out the edge section on chassis 20, edge section comprises first surface 31 and the second surface 32 being oppositely arranged with first surface 31, first surface 31 forms back pressure face, second surface 32 mineralization pressure faces, wherein, on first surface 31, have for weakening the first concaveconvex structure of eddy current.Due to the protuberance structure of the first concaveconvex structure and the principle of peripheral flow similar, protuberance structure can affect the generation of eddy current.Such the first concaveconvex structure can be controlled the flow direction of the air-flow of back pressure face, and then the recess of the first concaveconvex structure can controlled vortex flow disengaging, thereby the noise that the boundary layer eddy current of controlling back pressure face comes off, effectively reduce eddy current crack, and then reduce the rotational noise of centrifugal fan and the noise total value of centrifugal fan.
The principle of peripheral flow is: when air-flow breaks the barriers, different according to the shape of obstacle, can produce multi-form vortex shedding phenomenon at the lee face of obstacle.The centrifugal fan of application the present embodiment, in process at air-flow by a plurality of blades, at blade outer fringe position, can produce eddy current break-off, because eddy current is three-dimensional structure, first surface 31 is arranged to after concaveconvex structure, is made in the direction perpendicular to chassis 20, to be not easy to form three-dimensional eddy current, directly from source, suppress the generation of eddy current, thereby reduce the eddy current crack that blade 30 self produces, effectively reduce noise total value.
In the present embodiment, the first concaveconvex structure comprises the first concave-arc part and the first convex arc part being connected, and all extend along the bearing of trend of blade 30 the first concave-arc part and the first convex arc part, and the first convex arc part arranges away from chassis 20 with respect to the first concave-arc part.The first convex arc part can affect the generation of eddy current, the first concave-arc part is the disengaging of controlled vortex flow effectively, effectively reduce the noise that the boundary layer eddy current eddy current of back pressure face comes off, and then effectively reduce the rotational noise of centrifugal fan and the noise total value of centrifugal fan.The first concave-arc part and the first convex arc part simple in structure, easy to process.
In the present embodiment, on second surface 32, there is the second concaveconvex structure.In the present embodiment, the second concaveconvex structure comprises the second concave-arc part and the second convex arc part being connected, all extend along the bearing of trend of blade 30 the second concave-arc part and the second convex arc part, the second concave-arc part and the first corresponding setting in convex arc part, the second convex arc part and the corresponding setting of the first concave-arc part.
In the present embodiment, the sectional shape of edge section is S shape.The edge section of S shape can affect the generation of three-dimensional eddy current of the trailing edge of blade 30, may just can not form or can not form the eddy current that continuous formation is very large at edge section, thereby reduce eddy current crack.The edge section of S shape is simple in structure, easy to process.In process at air-flow by a plurality of blades, at blade outer fringe position, can produce eddy current break-off, because eddy current is three-dimensional structure, after the outer rim section of blade is designed to S type, make in the direction perpendicular to chassis 20, to be not easy to form three-dimensional eddy current, directly from source, suppress the generation of eddy current, thereby reduce the eddy current crack that blade 30 self produces, effectively reduce noise total value.
As shown in Figure 4, in the present embodiment, first surface 31 has A end points, B end points, C end points and D end points, B end points is positioned in the plane parallel with the surface on chassis 20 with C end points, A end points subpoint is in the plane P point, D end points subpoint is in the plane C end points, and the angle of the line between the line between P point and C end points and B end points and C end points is edge section tilt angle
edge section tilt angle
in the scope of 1 ° to 10 °.Edge section tilt angle
size relevant with the length of the edge section of blade 30, the length of the edge section of blade 30 is longer, edge section tilt angle
larger, wherein, the length of the edge section of blade 30 refers to the distance between B end points and C end points.In the present embodiment, two end points of the treble bearing of trend along blade 30 of the first convex arc part on first surface 31 are E end points and F end points, subpoint in the plane that E end points limits at A end points, B end points and F end points is G point, the angle of the line between the line between G point and F end points and E end points and F end points is to adjust angle θ, adjusts angle θ in the scope of 0.5 ° to 5 °.The size of adjusting angle θ is relevant with the width of the edge section of blade 30, and the width of the edge section of blade 30 is wider, adjusts angle θ larger, and wherein, the width of the edge section of blade 30 refers to the distance between A end points and B end points.Edge section tilt angle
need to determine according to the width of the first end of the edge section of blade 30 with the size of adjusting angle θ.In the present embodiment, the width of first end is 20mm.Edge section tilt angle
be difficult for excessively with the angle of adjusting angle θ, leaf curling is serious like this, edge section tilt angle
also be difficult for too smallly with the angle of adjusting angle θ, reduce like this DeGrain of eddy current crack.
In the present embodiment, centrifugal fan also comprises that lid is located at the cover plate 40 on a plurality of blades 30, and cover plate 40 has air inlet through hollow shaft mouth.Cover plate 40 can be controlled the eddy current of the side away from chassis 20 of blade 30, can avoid like this processing of complex leaf.When high rotating speed, the centrifugal fan noise that cover plate 40 is not set is large, and cover plate 40 can reduce eddy current crack, and then reduces the noise total value of centrifugal fan.
The application also provides a kind of air conditioner, according to the embodiment of the application's air conditioner (not shown), comprises centrifugal fan, and centrifugal fan is above-mentioned centrifugal fan.Due to the protuberance structure of the first concaveconvex structure and the principle of peripheral flow similar, protuberance structure can affect the generation of eddy current.Such the first concaveconvex structure can be controlled the flow direction of the air-flow of back pressure face, and then the recess of the first concaveconvex structure can controlled vortex flow disengaging, thereby the noise that the boundary layer eddy current of controlling back pressure face comes off, effectively reduce eddy current crack, and then reduce the rotational noise of centrifugal fan and the noise total value of centrifugal fan.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a centrifugal fan, comprising:
Wheel hub (10);
Chassis (20), is set on described wheel hub (10);
Blade (30), for a plurality of, it is upper also along being circumferentially arranged on the outside of described wheel hub (10) that a plurality of described blades (30) are arranged on described chassis (20);
It is characterized in that,
Described blade (30) comprises away from described wheel hub (10) and stretches out the edge section of described chassis (20), described edge section comprises first surface (31) and the second surface (32) being oppositely arranged with described first surface (31), described first surface (31) forms back pressure face, described second surface (32) mineralization pressure face, wherein, on described first surface (31), have for weakening the first concaveconvex structure of eddy current.
2. centrifugal fan according to claim 1, it is characterized in that, described the first concaveconvex structure comprises the first concave-arc part and the first convex arc part being connected, all extend along the bearing of trend of described blade (30) described the first concave-arc part and described the first convex arc part, and described the first convex arc part arranges away from described chassis (20) with respect to described the first concave-arc part.
3. centrifugal fan according to claim 2, is characterized in that, described second surface has the second concaveconvex structure on (32).
4. centrifugal fan according to claim 3, it is characterized in that, described the second concaveconvex structure comprises the second concave-arc part and the second convex arc part being connected, all extend along the bearing of trend of described blade (30) described the second concave-arc part and described the second convex arc part, described the second concave-arc part and described the first corresponding setting in convex arc part, described the second convex arc part and the corresponding setting of described the first concave-arc part.
5. centrifugal fan according to claim 1, is characterized in that, the sectional shape of described edge section is S shape.
6. centrifugal fan according to claim 2, it is characterized in that, described first surface (31) has A end points, B end points, C end points and D end points, described B end points is positioned in the plane parallel with the surface of described chassis (20) with described C end points, the subpoint of described A end points in described plane is P point, the subpoint of described D end points in described plane is described C end points, and the angle of the line between the line between described P point and described C end points and described B end points and described C end points is edge section tilt angle
described edge section tilt angle
in the scope of 1 ° to 10 °.
7. centrifugal fan according to claim 6, it is characterized in that, two end points of the treble bearing of trend along described blade (30) of described the first convex arc part on described first surface (31) are E end points and F end points, subpoint in the plane that described E end points limits at described A end points, described B end points and described F end points is G point, the angle of the line between the line between described G point and described F end points and described E end points and described F end points is to adjust angle θ, and described adjustment angle θ is in the scope of 0.5 ° to 5 °.
8. centrifugal fan according to claim 1, is characterized in that, described centrifugal fan also comprises that lid is located at the cover plate (40) on a plurality of described blades (30), and described cover plate (40) has air inlet through hollow shaft mouth.
9. an air conditioner, comprises centrifugal fan, it is characterized in that, described centrifugal fan is the centrifugal fan described in any one in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439044.4A CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439044.4A CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154035A true CN104154035A (en) | 2014-11-19 |
| CN104154035B CN104154035B (en) | 2017-11-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410439044.4A Active CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
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| Country | Link |
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| CN (1) | CN104154035B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018232838A1 (en) * | 2017-06-23 | 2018-12-27 | 广东美的制冷设备有限公司 | Wind wheel, fan and refrigeration equipment |
| CN110566500A (en) * | 2019-10-12 | 2019-12-13 | 浙江科贸智能机电股份有限公司 | Impeller of centrifugal ventilator |
| CN112128120A (en) * | 2020-09-17 | 2020-12-25 | 青岛海信日立空调系统有限公司 | Ultra-thin indoor unit |
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| CN2581734Y (en) * | 2001-11-09 | 2003-10-22 | 松下电器产业株式会社 | Fan vane for air conditioner |
| JP3649157B2 (en) * | 2001-06-06 | 2005-05-18 | ダイキン工業株式会社 | Centrifugal fan and air conditioner equipped with the centrifugal fan |
| JP4432474B2 (en) * | 2003-11-27 | 2010-03-17 | ダイキン工業株式会社 | Centrifugal blower impeller and centrifugal blower provided with the impeller |
| CN204025149U (en) * | 2014-08-29 | 2014-12-17 | 珠海格力电器股份有限公司 | Centrifugal fan and there is its air conditioner |
-
2014
- 2014-08-29 CN CN201410439044.4A patent/CN104154035B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3649157B2 (en) * | 2001-06-06 | 2005-05-18 | ダイキン工業株式会社 | Centrifugal fan and air conditioner equipped with the centrifugal fan |
| CN2581734Y (en) * | 2001-11-09 | 2003-10-22 | 松下电器产业株式会社 | Fan vane for air conditioner |
| JP4432474B2 (en) * | 2003-11-27 | 2010-03-17 | ダイキン工業株式会社 | Centrifugal blower impeller and centrifugal blower provided with the impeller |
| CN204025149U (en) * | 2014-08-29 | 2014-12-17 | 珠海格力电器股份有限公司 | Centrifugal fan and there is its air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018232838A1 (en) * | 2017-06-23 | 2018-12-27 | 广东美的制冷设备有限公司 | Wind wheel, fan and refrigeration equipment |
| CN110566500A (en) * | 2019-10-12 | 2019-12-13 | 浙江科贸智能机电股份有限公司 | Impeller of centrifugal ventilator |
| CN112128120A (en) * | 2020-09-17 | 2020-12-25 | 青岛海信日立空调系统有限公司 | Ultra-thin indoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104154035B (en) | 2017-11-14 |
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