CN204082660U - Centrifugal fan and there is its air conditioner - Google Patents
Centrifugal fan and there is its air conditioner Download PDFInfo
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- CN204082660U CN204082660U CN201420638632.6U CN201420638632U CN204082660U CN 204082660 U CN204082660 U CN 204082660U CN 201420638632 U CN201420638632 U CN 201420638632U CN 204082660 U CN204082660 U CN 204082660U
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- centrifugal fan
- impeller
- hub disk
- wheel hub
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- 238000000926 separation method Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 description 7
- 230000002411 adverse Effects 0.000 description 5
- 238000010408 sweeping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a kind of centrifugal fan and has its air conditioner, and centrifugal fan comprises: wheel hub (10); Impeller hub disk (20), is set on wheel hub (10); Multiple blade (30), multiple blade (30) arranges the upper outside being also circumferentially arranged on wheel hub (10) of impeller hub disk (20), and the height of blade (30) little by little outwards reduces along its bearing of trend.The technical solution of the utility model efficiently solves the problem that there is separation eddy between prior art Leaf.
Description
Technical field
The utility model relates to air-conditioning technical field, in particular to a kind of centrifugal fan and the air conditioner with it.
Background technique
At present, in centrifugal blower, the design of vane type line is for centrifugal fan performance important.In prior art, the blade of major part centrifugal fan adopts single hop or two-part circular arc airfoil structure, there is the multiclass non-uniform phenomenons such as blade-to-blade vortex stream, separation eddy in the runner place of blade between its blade of such aerofoil profile, and then it is uneven easily to cause the air-flow flowed out, increase aerodynamic noise, greatly limit the lifting of centrifugal fan efficiency like this.
Model utility content
Main purpose of the present utility model is the air conditioner providing a kind of centrifugal fan and have it, to solve the problem that there is separation eddy between prior art Leaf.
To achieve these goals, according to an aspect of the present utility model, provide a kind of centrifugal fan, comprising: wheel hub; Impeller hub disk, is set on wheel hub; Multiple blade, multiple blade arranges outside impeller hub disk being also circumferentially arranged on wheel hub, and the height of blade little by little outwards reduces along its bearing of trend.
Further, the maximum height h of blade
maxwith minimum constructive height h
minratio is in the scope of 1 ~ 2.
Further, between the side away from impeller hub disk of blade and the surface being parallel to impeller hub disk, there is the first angle theta
1, the first angle theta
1be less than 90 °.
Further, the first angle theta
1in the scope of 3 ° ~ 16 °.
Further, the side away from impeller hub disk of blade is arc surfaced.
Further, between the side towards wheel hub of blade and the surface being parallel to impeller hub disk, there is the second angle theta
2, the second angle theta
2be less than 85 °.
Further, the second angle theta
2within the scope of 35 ° ~ 60 °.
Further, centrifugal fan also comprises the impeller front disc covered and be located on multiple blade, and have gap between the surface towards blade of impeller front disc and the side away from impeller hub disk of blade, gap is within the scope of 1.5mm ~ 6mm.
Further, centrifugal fan also comprises the impeller front disc covered and be located on multiple blade, fits in the surface towards blade of impeller front disc and the side away from impeller hub disk of blade.
According to another aspect of the present utility model, provide a kind of air conditioner, comprise centrifugal fan, centrifugal fan is above-mentioned centrifugal fan.
Application the technical solution of the utility model, centrifugal fan comprises wheel hub, impeller hub disk and multiple blade, impeller hub disk is set on wheel hub, and multiple blade arranges outside impeller hub disk being also circumferentially arranged on wheel hub, and the height of blade little by little outwards reduces along its bearing of trend.When centrifugal fan works, the speed of the leading edge of the close wheel hub of blade is little relative to the speed of the trailing edge away from wheel hub of blade, said structure can increase the wind sweeping area of the leading edge of blade, greatly can reduce the ricing of air current flow between blade like this, this respective outer side edges streamline profile, fully can reduce speed and the pressure gradient of the ingress of blade, make the near wall pressure reduction of blade lower than the adverse pressure gradient producing separated flow thus, multiclass Turbulence Flow is effectively avoided to produce in leading edge with this, thus raising fan performance, realize noise reduction.
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 plan structure schematic diagram of the embodiment according to centrifugal fan of the present utility model;
Fig. 2 shows the schematic side view of the mounted blade of the centrifugal fan of Fig. 1;
Fig. 3 shows the schematic diagram of the air flow direction of the centrifugal fan of Fig. 2; And
Fig. 4 shows the side-looking structural representation of the mounted blade of the embodiment two according to centrifugal fan of the present utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, wheel hub; 20, impeller hub disk; 30, blade; 40, impeller front disc.
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.
As depicted in figs. 1 and 2, the centrifugal fan of embodiment one comprises wheel hub 10, impeller hub disk 20 and multiple blade 30, impeller hub disk 20 is set on wheel hub 10, multiple blade 30 arranges outside impeller hub disk 20 being also circumferentially arranged on wheel hub 10, and the height of blade 30 little by little outwards reduces along its bearing of trend.Blade 30 employing waits deceleration aerofoil profile.
The centrifugal fan of Application Example one, centrifugal fan comprises wheel hub 10, impeller hub disk 20 and multiple blade 30, impeller hub disk 20 is set on wheel hub 10, multiple blade 30 arranges outside impeller hub disk 20 being also circumferentially arranged on wheel hub 10, and the height of blade 30 little by little outwards reduces along its bearing of trend.When centrifugal fan works, the speed of the leading edge of the close wheel hub 10 of blade 30 is little relative to the speed of the trailing edge away from wheel hub 10 of blade 30, said structure can increase the wind sweeping area of the leading edge of blade 30, greatly can reduce the ricing of air current flow between blade 30 like this, the deceleration aerofoil profiles such as this respective outer side edges, fully can reduce speed and the pressure gradient of the ingress of blade 30, make the near wall pressure reduction of blade 30 lower than the adverse pressure gradient producing separated flow thus, multiclass Turbulence Flow is effectively avoided to produce in leading edge with this, thus raising fan performance, realize noise reduction.
In embodiment one, the maximum height h of blade 30
maxwith minimum constructive height h
minratio is in the scope of 1 ~ 2.The same described leading edge structure design, it coordinates vane airfoil profile structure can reduce the adverse pressure gradient of runner between leaf, with the generation of this control separation stream and blade-to-blade vortex.
In embodiment one, between the side away from impeller hub disk 20 of blade 30 and the surface being parallel to impeller hub disk 20, there is the first angle theta
1, the first angle theta
1be less than 90 °.The same described leading edge structure design, it coordinates vane airfoil profile structure can reduce the adverse pressure gradient of runner between leaf, with the generation of this control separation stream and blade-to-blade vortex.Said structure makes the side away from impeller hub disk 20 of blade 30 be inclined-plane relative to the surface of impeller hub disk 20, and the height of blade outer rim can change in equivalent, forms one section of oblique line.Preferably, the first angle theta
1in the scope of 3 ° ~ 16 °.
As shown in figures 1 and 3, in embodiment one, between the side towards wheel hub 10 of blade 30 and the surface being parallel to impeller hub disk 20, there is the second angle theta
2, the second angle theta
2be less than 85 °.Said structure make the leading edge of blade 30 and impeller hub disk 20 at an angle, velocity gradient between the leading edge each point that can reduce blade 30 like this, and then improve the air-flow at leading edge place of blade 30, improve the uniformity of the air-flow that centrifugal fan flows out, promote centrifugal fan performance, inhibit the generation of the multiclass eddy current of the runner between blade 30, thus realize the effect compared with low noise.In order to reduce noise further, preferably, the second angle theta
2within the scope of 35 ° ~ 60 °.
Air flow direction between the adjacent blades 30 of the centrifugal fan of embodiment one as shown in figures 1 and 3, comparatively uneven in the velocity flow profile at the entrance section A-A place of blade 30, by changing the leading edge of blade 30, significantly reduce the ricing of the flow velocity of the inlet side of blade 30, the flow velocity of air-flow air-flow after blade 30 tends to be steady gradually, form the uniform air flow shown in section B-B, effectively improve the airflow homogeneity of the outflow of centrifugal fan, and then improve fan performance, thus effectively reduce noise, while reducing noise, the noise tonequality of effluent stream obtains obvious improvement.
Fig. 4 shows the structure of the embodiment two of the centrifugal fan of the application, and centrifugal fan and the difference of embodiment one of embodiment two are that the shape of the side away from impeller hub disk 20 of blade 30 is different.In embodiment one, the side away from impeller hub disk 20 of blade 30 is inclined-plane relative to the surface of impeller hub disk 20, and in embodiment two, the side away from impeller hub disk 20 of blade 30 is arc surfaced.Arc surfaced makes the first angle theta
1change according to certain rules, arc shaped surface preferably can realize the guide functions of air-flow runner between leaf.
In embodiment two, centrifugal fan also comprises the impeller front disc 40 covered and be located on multiple blade 30, fits in the surface towards blade 30 of impeller front disc 40 and the side away from impeller hub disk 20 of blade 30, and namely impeller front disc 40 and blade 30 are combined as an entirety.Integrated design is convenient to install location, and the increase of impeller weight simultaneously makes its dynamic balance property improve, and can ensure the stationarity that blade 30 operates preferably.Certainly, have gap between the surface towards blade 30 of impeller front disc 40 and the side away from impeller hub disk 20 of blade 30, gap is within the scope of 1.5mm ~ 6mm.After adding impeller front disc 40, by Spielpassung, while reduction leakage loss, also can prevent the axial float of impeller air-flow, what realize runner between leaf steadily goes out stream.
The application also provides a kind of air conditioner, and the embodiment according to the air conditioner (not shown) of the application comprises centrifugal fan, and centrifugal fan is above-mentioned centrifugal fan.Centrifugal fan comprises wheel hub 10, impeller hub disk 20 and multiple blade 30, impeller hub disk 20 is set on wheel hub 10, multiple blade 30 arranges outside impeller hub disk 20 being also circumferentially arranged on wheel hub 10, and the height of blade 30 little by little outwards reduces along its bearing of trend.When centrifugal fan works, the speed of the leading edge of the close wheel hub 10 of blade 30 is little relative to the speed of the trailing edge away from wheel hub 10 of blade 30, said structure can increase the wind sweeping area of the leading edge of blade 30, greatly can reduce the ricing of air current flow between blade 30 like this, this respective outer side edges streamline profile, fully can reduce speed and the pressure gradient of the ingress of blade 30, make the near wall pressure reduction of blade 30 lower than the adverse pressure gradient producing separated flow thus, multiclass Turbulence Flow is effectively avoided to produce in leading edge with this, thus raising fan performance, realize noise reduction.
The foregoing is 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 (10)
1. a centrifugal fan, comprising:
Wheel hub (10);
Impeller hub disk (20), is set on described wheel hub (10);
Multiple blade (30), multiple described blade (30) arranges the upper outside being also circumferentially arranged on described wheel hub (10) of described impeller hub disk (20),
It is characterized in that, the height of described blade (30) little by little outwards reduces along its bearing of trend.
2. centrifugal fan according to claim 1, is characterized in that, the maximum height h of described blade (30)
maxwith minimum constructive height h
minratio is in the scope of 1 ~ 2.
3. centrifugal fan according to claim 1, is characterized in that, has the first angle theta between the side away from described impeller hub disk (20) of described blade (30) and the surface being parallel to described impeller hub disk (20)
1, described first angle theta
1be less than 90 °.
4. centrifugal fan according to claim 3, is characterized in that, described first angle theta
1in the scope of 3 ° ~ 16 °.
5. centrifugal fan according to claim 1, is characterized in that, the side away from described impeller hub disk (20) of described blade (30) is arc surfaced.
6. centrifugal fan according to claim 1, is characterized in that, has the second angle theta between the side towards described wheel hub (10) of described blade (30) and the surface being parallel to described impeller hub disk (20)
2, described second angle theta
2be less than 85 °.
7. centrifugal fan according to claim 6, is characterized in that, described second angle theta
2within the scope of 35 ° ~ 60 °.
8. centrifugal fan according to claim 1, it is characterized in that, described centrifugal fan also comprises lid and is located at impeller front disc (40) on multiple described blade (30), have gap between the surface towards described blade (30) of described impeller front disc (40) and the side away from described impeller hub disk (20) of described blade (30), described gap is within the scope of 1.5mm ~ 6mm.
9. centrifugal fan according to claim 1, it is characterized in that, described centrifugal fan also comprises lid and is located at impeller front disc (40) on multiple described blade (30), fits in the surface towards described blade (30) of described impeller front disc (40) and the side away from described impeller hub disk (20) of described blade (30).
10. an air conditioner, comprises centrifugal fan, it is characterized in that, the centrifugal fan of described centrifugal fan according to any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638632.6U CN204082660U (en) | 2014-10-29 | 2014-10-29 | Centrifugal fan and there is its air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638632.6U CN204082660U (en) | 2014-10-29 | 2014-10-29 | Centrifugal fan and there is its air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204082660U true CN204082660U (en) | 2015-01-07 |
Family
ID=52175383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638632.6U Active CN204082660U (en) | 2014-10-29 | 2014-10-29 | Centrifugal fan and there is its air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204082660U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279188A (en) * | 2014-10-29 | 2015-01-14 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with same |
| CN114962346A (en) * | 2022-06-29 | 2022-08-30 | 江西镁淇实业有限公司 | Efficient treatment chamber for textile manufacturing process |
-
2014
- 2014-10-29 CN CN201420638632.6U patent/CN204082660U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279188A (en) * | 2014-10-29 | 2015-01-14 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with same |
| CN104279188B (en) * | 2014-10-29 | 2017-08-01 | 珠海格力电器股份有限公司 | Centrifugal fan and the air conditioner with it |
| CN114962346A (en) * | 2022-06-29 | 2022-08-30 | 江西镁淇实业有限公司 | Efficient treatment chamber for textile manufacturing process |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160318 Address after: 050035 Zhujiang Road, high tech Zone, Hebei, Shijiazhuang, China, No. 252 Patentee after: GREE ELECTRIC APPLIANCES (SHIJIAZHUANG) Co.,Ltd. Address before: 519070 Guangdong city of Zhuhai Province Qianshan No. six Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |