CN2675918Y - Impeller for blower fan, blower fan using the impeller and air conditioner using the blower fan - Google Patents
Impeller for blower fan, blower fan using the impeller and air conditioner using the blower fan Download PDFInfo
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- CN2675918Y CN2675918Y CN 200320119148 CN200320119148U CN2675918Y CN 2675918 Y CN2675918 Y CN 2675918Y CN 200320119148 CN200320119148 CN 200320119148 CN 200320119148 U CN200320119148 U CN 200320119148U CN 2675918 Y CN2675918 Y CN 2675918Y
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Abstract
The utility model relates to an impeller for a blower fan, such as an air conditioner, etc., the blower fan using the impeller and the air conditioner using the blower fan. The utility model is particularly a vane shape of the impeller. The utility model relates to the impeller for the blow fan, and the impeller is provided with a wheel hub which is provided with a plurality of vanes. The cross-section shape of the radius direction of the vanes is made to form a concave curve on the side of the vane end opposite to a negative pressure surface and forms a convex curve on the side of the wheel hub opposite to the negative pressure surface. The curvature radius of the convex curve on the side of the vane end has different values on the cross section of the vanes along the radius direction, and the curvature radius gradually becomes smaller along with the transmission from the advancing edge side to the trailing edge side of the vanes. Because the structure is adopted, the utility model can restrain the phenomenon of vane end vortex delamination in order to achieve low noise.
Description
Technical field
The utility model relates to the impeller that uses and uses the blower fan of this impeller and use this blower fan on blower fans such as air conditioner air conditioner relates in particular to the blade shape of this impeller.
Background technique
Traditional air conditioner is the blade 2 that radial setting is made up of multi-disc with draught fan impeller as shown in Figure 1 around the wheel hub 3 that slightly is circular cone shape, arrow is represented sense of rotation; Most of air-flow flows into the leading edge 6 of blade 2, and flows out from trailing edge 7, and impeller 1 is advertised air by this way.Fig. 2 is the part figure of the blade 2 rotating locus faces of impeller 1.In Fig. 2, the surface of revolution that blade 2 leading edges 6 are marked half one and Lower Half thereon is concavity and convex with respect to the windward side respectively.The first half of blade 2 is defined as around the part between blade middle part and the end of blade 8, and the Lower Half of blade 2 is defined as around the part between blade middle part and the wheel hub 3.The B-B line represents that air-flow is along the mobile stream center of the direction of arrow.The C-C line is represented the rotating center of wheel hub center, impeller 1.Fig. 3 is the sectional view of cutting open along the A-A line among Fig. 1.The radial cross-section 2 of blade 2 is concavity and convex with respect to the windward side respectively at the blade first half and Lower Half.But, be the radius of curvature of the curve of concavity in described upper half part, all constitute impeller in any radial direction section portion of idle call fan blade 2 with roughly the same value.So when blower fan turns round, be restricted near the control of the blade end eddy current that takes place at end of blade 8 annexes of blade 2 and trailing edge, peel off from the suction surface of blade.
Summary of the invention
The technological scheme that the utility model provides is to solve above-mentioned traditional problem, provides a kind of minimizing to be peeled off the lower idle call draught fan impeller of aerodynamic loss, noise that brings by eddy current.In addition, the static pressure efficiency of impeller is improved.
The technical solution of the utility model is, a kind of draught fan impeller, described impeller has a wheel hub that a plurality of blades are installed, and the section configuration of the radial direction of described blade is made in the end of blade side constitute the concavity curve facing to suction surface, constitutes convex curve in hub side facing to suction surface; It is characterized in that, the radius of curvature of the concavity curve at described end of blade side place, at blade along having different values on the section of radial direction; And along with the transition to the trailing edge side of the front edge side of described blade, radius of curvature reduces gradually.
Especially, the radius of curvature of the convex curve at described hub side place also reduces gradually along with the transition to the trailing edge side of the front edge side of described blade.
Especially, on the suction surface of described blade, be distributed with concave point.
Owing to adopt said structure, by the leakage current that produces to suction surface from the pressure side of blade, make near the generation of the end of blade eddy current of the suction surface generation the blade end of blade, and near trailing edge, peel off to the process of trailing edge side from the leading edge effluent from suction surface along the opposite direction of blade rotation, but near the described concavity curve part blade and blade is distolateral is inhibited, to realize low noiseization.Promptly, the blade end eddy current takes place at the suction surface of blade, and near the central authorities of blade chord length, peel off from the suction surface of blade by the position of trailing edge, the front edge side along with described blade of the radius of curvature of described concavity curve reduces gradually to the transition of trailing edge side, so can suppress the phenomenon that this blade end eddy current is peeled off.The design that is distributed with concave point on the suction surface of described blade also is to peel off in order to suppress this blade end eddy current; Thereby can reduce by eddy current and peel off the aerodynamic loss that brings, further raise the efficiency.Simultaneously, the radius of curvature of the convex curve at described blade hub side place is along with the transition to the trailing edge side of the front edge side of described blade, the characteristics that also reduce gradually make blade can make the air-flow that radially sucks more level and smooth under the high load working state, thereby play the effect that increases static pressure.
Description of drawings
Fig. 1 is the floor map of the impeller of prior art;
Fig. 2 is the partial schematic diagram of the impeller rotating locus of prior art;
Fig. 3 is the sectional view of cutting open along A-A line among Fig. 1;
Fig. 4 A is the floor map of the utility model embodiment with impeller;
Fig. 4 B is Fig. 4 A side partial schematic diagram;
Fig. 5 A is the sectional view of cutting open along B-O line among Fig. 4 A;
Fig. 5 B is the sectional view of cutting open along C-O line among Fig. 4 A;
Fig. 5 C is the sectional view of cutting open along D-O line among Fig. 4 A;
Fig. 6 is the sectional view of cutting open along E-E line among Fig. 4 A;
Fig. 7 is the characteristic comparison plotted curve of the utility model embodiment with impeller and a kind of conventional impellers;
Fig. 8 is the noise pattern of the utility model embodiment with impeller;
Fig. 9 is a kind of noise pattern of conventional impellers;
Embodiment
Shown in Fig. 4 A, idle call draught fan impeller 1 is that the wheel hub 3 that roughly is circular cone shape with the cross section is the center, radially is provided with 3 pieces of blades 2; 3 pieces of blades 2 are of similar shape, and each blade 2 is distributed on the wheel hub 3.Arrow is represented the rotary blade direction.
Shown in Fig. 4 A, the shape of described blade 2 roughly is the fan annular, and described vane trailing edge 4 is crest curve at root to the blade middle part of the wheel hub 3 of blade, is concave curve at blade middle part to blade end of blade 5.In the leading edge 6 of blade part, a leg-of-mutton auxiliary blade 7 is arranged near end of blade 5; The end 7a point of auxiliary blade overlaps with the intersection point place of end of blade 5 at blade inlet edge 6, and one side of described leg-of-mutton auxiliary blade 7 is close to described leading edge 6 and is wholely set.Adopt said structure, as starting point, the blade end eddy current is coniform generation at the suction surface of blade, and this blade end eddy current is peeled off diffluence at the blade middle part with the front end of leg-of-mutton auxiliary blade.Promptly this leg-of-mutton blade has the effect that its front end place generates the blade end eddy current that is defined in.Therefore, leg-of-mutton blade has stipulated that state that near this blade end eddy current suction surface place the end of blade of blade takes place and blade end eddy current and blade peel off the state of diffluence.So it is minimal effect that leg-of-mutton blade has the influence that makes the end of blade eddy current of the rear blade that turns over; The inflow air that each blade is entered is the most level and smooth, more is difficult to produce air on the blade of rear and peels off and wild effects such as stall.Certainly, do not have the triangle auxiliary blade, the utility model also can be realized the utility model ground purpose.
On the suction surface 8 of described blade 2 also according to the distributing concave point 9 of definite shape of certain rules.These concave points 9 can be the suction surfaces 8 that is uniformly distributed in whole blade, also can only be distributed in blade middle part to blade end of blade 5 and be the concave curve part.Concave point 9 can be circular, also can be oval.The design that is distributed with concave point on the suction surface 8 of described blade also is to peel off in order to suppress this blade end eddy current.
Fig. 4 B is Fig. 4 A side partial schematic diagram; This there is shown has a torsional angle φ between described blade and the described wheel hub.For reducing the inflow air influence that air-flow that last blade peels off enters back one blade, the span of the torsional angle φ between described blade and the described wheel hub be to spend, spend smaller or equal to 60 more than or equal to 30; The best is 45 degree.
Shown in Fig. 5 A, 5B, 5C, making the section configuration of the radial direction of blade 2 at blade is the concavity curve along near the suction surface side to the end of blade stream center line E-E that connects leading edge and trailing edge, is convex curve at blade along near the suction surface side to the wheel hub 3 stream center line E-E that connects leading edge and trailing edge.And blade along near the stream center line E-E that connects leading edge and trailing edge to the radius of curvature of the concavity curve at described end of blade 5 side places, at blade along having different values on the section of radial direction; And along with the transition of leading edge 6 side direction trailing edges 4 sides of described blade, radius of curvature reduces gradually.Promptly, if near the radius of curvature of the radial direction section portion the leading edge of blade 26 is near the radius of curvature of the radial direction the central authorities of chord length of R1, blade 2 is near the radius of curvature of the radial direction section portion the trailing edge 4 of R2, blade 2 when being R3, and the radius of curvature magnitude relationship is R1＞R2＞R3.Above radius of curvature magnitude relationship is to be that representative is illustrated with 3 radial direction section portions, and from the consideration of aerodynamic force aspect, the radius of curvature of radial direction section portion will be according to the formation blade of above-mentioned relation slyness arbitrarily.
The radius of curvature of the convex curve at described blade wheel hub 3 side places also reduces gradually along with the transition of leading edge 6 side direction trailing edges 4 sides of described blade.
Owing to adopt said structure, by the leakage current that produces to suction surface 8 from the pressure side 10 of blade 2, make near the generation of the end of blade eddy current of suction surface 8 generations blade end of blade 5, and near trailing edge 4, peel off to the process of trailing edge 4 sides from leading edge 6 effluents from suction surface 8 along the opposite direction of blade rotation, but near the described concavity curve part blade and blade is distolateral is inhibited, to realize low noiseization.Promptly, the blade end eddy current takes place at the suction surface 8 of blade, and peel off from the suction surface 8 of blade by the position of trailing edge 4 at the central attachment of blade chord length, the transition along with leading edge 6 side direction trailing edges 4 sides of described blade of the radius of curvature of described concavity curve reduces gradually, so can suppress the phenomenon that this blade end eddy current is peeled off.Thereby can reduce by eddy current and peel off the aerodynamic loss that brings, further raise the efficiency.Simultaneously, the radius of curvature of the convex curve at described blade wheel hub 3 side places is along with the transition of leading edge 6 side direction trailing edges 4 sides of described blade, the characteristics that also reduce gradually make blade can make the air-flow that radially sucks more level and smooth under the high load working state, thereby play the effect that increases static pressure.
As shown in Figure 6, the sectional view for cutting open along E-E line among Fig. 4 A; The shape of cross section that blade is cut open along the stream center line E-E that connects leading edge and trailing edge is arcuation, and described blade 2 is except leading edge 6 parts are thicker, for approaching section more uniformly; Process from described leading edge 6 to described trailing edge 4 transition, we can also see, the radius of curvature R 4 of blade is reducing gradually.This low profile inboard is a pressure side 10, and the outside is a suction surface 8.Certainly, also can adopt other blade airfoil, as have the leading edge of arch and the thick blade of sharp-pointed trailing edge.Such structure can make from the air-flow of peeling off along the rightabout last blade of impeller sense of rotation and reduce the back inflow air influence that enters of one blade, more is difficult to produce air on the blade of rear and peels off and wild effect such as stall.
As shown in Figure 7, be the characteristic comparison plotted curve of the utility model embodiment with impeller and a kind of conventional impellers.Employing blade external diameter is 410 millimeters a impeller in the experiment; Under the constant condition of rotation speed of fan, be illustrated in this plotted curve with respect to the static pressure and the noise properties of air quantity.In the figure, abscissa is represented air quantity, and the left side y coordinate is represented static pressure, and the right side y coordinate is represented noise.
As indicated in this experiment, the noise of the utility model impeller is lower 2 decibels than conventional impellers at open air quantity point Q1 place, and the noise of the utility model impeller all remains at low levels till the Q2 point of 68% open air quantity always.About static pressure, the utility model impeller has risen 32% at the Q3 point place of 60% open air quantity than conventional impellers.
Fig. 8 is the noise pattern of the utility model embodiment with impeller; Fig. 9 is a kind of noise pattern of conventional impellers; Noise among two figure is to measure at open air quantity point Q1.
This blower fan can also be 2,4 or 5 etc., i.e. multi-disc with the number of blade of impeller.Described wheel hub also can be common cylindric.
A kind of blower fan comprises motor and the impeller that is connected with described motor, and described impeller adopts the impeller 1 with above-mentioned feature.
A kind of air conditioner comprises indoor set and outdoor unit, and described outdoor unit has blower fan and heat exchanger; Blower fan is used to promote the heat exchange of described heat exchanger.Described blower fan comprises motor and the impeller that is connected with described motor, and described impeller adopts the impeller 1 with above-mentioned feature.
Claims (11)
1, a kind of draught fan impeller, described impeller have a wheel hub that a plurality of blades are installed, and the section configuration of the radial direction of described blade are made in the end of blade side constitute the concavity curve facing to suction surface, constitute convex curve in hub side facing to suction surface; It is characterized in that, the radius of curvature of the concavity curve at described end of blade side place, at blade along having different values on the section of radial direction; And along with the transition to the trailing edge side of the front edge side of described blade, radius of curvature reduces gradually.
2, draught fan impeller according to claim 1 is characterized in that, the radius of curvature of the convex curve at described hub side place also reduces gradually along with the transition to the trailing edge side of the front edge side of described blade.
3, draught fan impeller according to claim 1 and 2 is characterized in that, is distributed with concave point on the suction surface of described blade.
4, draught fan impeller according to claim 1 and 2 is characterized in that, described vane trailing edge is crest curve at root to the blade middle part of the wheel hub of blade, is concave curve at blade middle part to blade end of blade;
5, draught fan impeller according to claim 1 and 2 is characterized in that, in the leading edge of the blade part near end of blade, a leg-of-mutton auxiliary blade is arranged; A bit overlapping with the intersection point place of end of blade of auxiliary blade at blade inlet edge, and one side of described leg-of-mutton auxiliary blade is close to described leading edge and is wholely set.
6, draught fan impeller according to claim 1 and 2, it is characterized in that, the shape of cross section that blade is cut open along the stream center line that connects leading edge and trailing edge is arcuation, and along with from the described leading edge of blade to described trailing edge transition, the radius of curvature of blade is reducing gradually.
7, draught fan impeller according to claim 1 and 2 is characterized in that, the torsional angle between described blade and the described wheel hub is more than or equal to 30 degree, smaller or equal to 60 degree;
8, draught fan impeller according to claim 1 and 2 is characterized in that, the torsional angle between described blade and the described wheel hub is 45 degree.
9, a kind of blower fan, comprise motor and the impeller that is connected with described motor, described impeller has a wheel hub that a plurality of blades are installed, and the section configuration of the radial direction of described blade is made in the end of blade side constitute the concavity curve facing to suction surface, constitutes convex curve in hub side facing to suction surface; It is characterized in that, the radius of curvature of the concavity curve at described end of blade side place, at blade along having different values on the section of radial direction; And along with the transition to the trailing edge side of the front edge side of described blade, radius of curvature reduces gradually.
10, blower fan according to claim 8 is characterized in that, the radius of curvature of the convex curve at described hub side place also reduces gradually along with the transition to the trailing edge side of the front edge side of described blade.
11, a kind of air conditioner comprises indoor set and outdoor unit, and described outdoor unit has blower fan and heat exchanger; Blower fan is used to promote the heat exchange of described heat exchanger.Described blower fan, comprise motor and the impeller that is connected with described motor, described impeller has a wheel hub that a plurality of blades are installed, and the section configuration of the radial direction of described blade is made in the end of blade side constitute the concavity curve facing to suction surface, constitutes convex curve in hub side facing to suction surface; It is characterized in that, the radius of curvature of the concavity curve at described end of blade side place, at blade along having different values on the section of radial direction; And along with the transition to the trailing edge side of the front edge side of described blade, radius of curvature reduces gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320119148 CN2675918Y (en) | 2003-12-15 | 2003-12-15 | Impeller for blower fan, blower fan using the impeller and air conditioner using the blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320119148 CN2675918Y (en) | 2003-12-15 | 2003-12-15 | Impeller for blower fan, blower fan using the impeller and air conditioner using the blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2675918Y true CN2675918Y (en) | 2005-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320119148 Expired - Lifetime CN2675918Y (en) | 2003-12-15 | 2003-12-15 | Impeller for blower fan, blower fan using the impeller and air conditioner using the blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2675918Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318765C (en) * | 2003-12-15 | 2007-05-30 | 珠海格力电器股份有限公司 | Impeller for fan, fan using same and air conditioner using the fan |
| CN102345638A (en) * | 2010-07-27 | 2012-02-08 | 松下电器产业株式会社 | Diagonal flow fan and air conditioner equipped with the diagonal flow fan |
-
2003
- 2003-12-15 CN CN 200320119148 patent/CN2675918Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318765C (en) * | 2003-12-15 | 2007-05-30 | 珠海格力电器股份有限公司 | Impeller for fan, fan using same and air conditioner using the fan |
| CN102345638A (en) * | 2010-07-27 | 2012-02-08 | 松下电器产业株式会社 | Diagonal flow fan and air conditioner equipped with the diagonal flow fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20031215 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |