CN202360458U - Multi-wing centrifugal fan with reinforced air inlet function - Google Patents
Multi-wing centrifugal fan with reinforced air inlet function Download PDFInfo
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- CN202360458U CN202360458U CN2011205405311U CN201120540531U CN202360458U CN 202360458 U CN202360458 U CN 202360458U CN 2011205405311 U CN2011205405311 U CN 2011205405311U CN 201120540531 U CN201120540531 U CN 201120540531U CN 202360458 U CN202360458 U CN 202360458U
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- impeller
- air inlet
- blade
- air
- centrifugal fan
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Abstract
The utility model discloses a multi-wing centrifugal fan with a reinforced air inlet function, which adopts a non-traditional 'abnormal-shaped blade' structure. The multi-wing centrifugal fan with a reinforced air inlet function is composed of a fan main body (1) and a centrifugal impeller (2), wherein blades are fixed on the impeller and are evenly distributed around the circumstance. The multi-wing centrifugal fan is characterized in that the air inlet edge (201) of each blade on the air inlet of the blade is formed by curves or broken lines or is combined by the curves and a straight line. Under the condition that the impeller diameter is not increased and the size of a volute fluid channel is not changed, the shape of the air inlet edge of the blade is changed to enlarge the air inlet area of the impeller so as to improve the air quantity and the air pressure of the centrifugal fan. The shapes of the air inlet edges and the air outlet edges of the blades of the impeller are differently optimized to obviously improve an air flow field on an impeller inlet; the air flowing loss and the fan noise are obviously lowered; the impeller output speed is improved; and the air quantity, the air pressure and the efficiency of the fan are obviously improved. The abnormal-shaped blade has various structures to satisfy different requirements. The multi-wing centrifugal fan provides a new path for improving the air quantity, the air pressure and the efficiency of the centrifugal fan and lowering noise, has the advantages of simple structure, low cost and obvious energy-saving and environment-friendly effect, is easy to implement and can be popularized and used in various fields.
Description
Technical field
The present invention relates to centrifugal blower, particularly have the multiple wing type centrifugal blower fan of strengthening the air inlet function.
Background technique
Existing centrifugal blower; Especially multiple wing type centrifugal blower fan; Its blade such as is at the width design, is keeping will improving the air quantity and the blast of blower fan under the constant prerequisite of draught fan impeller diameter, spiral case fluid channel dimensions; Have only through improving rotation speed of fan, the draught fan impeller peripheral velocity is improved realize.Yet blower fan Rotation Noise and eddy flow noise are proportional with 10 powers and 6 powers of impeller circumferential speed respectively, improve rotation speed of fan, and the noise of blower fan is increased, and are unfavorable for the improvement and the environmental protection of noise.
In the range hood industry, obtain bigger air quantity and blast for making range hood, generally all be to adopt forward direction blade profile multiple wing type centrifugal blower fan, the multiple wing type centrifugal blower fan of this kind blade profile, efficient is starkly lower than the blower fan of other blade profiles, is unfavorable for energy-conservation.In addition, forward direction blade profile centrifugal blower has motor load along with fan delivery increases and the rapid characteristic that rises, and for preventing motor overload, has only the more powerful accordingly motor of employing.
Strengthen air quantity and blast that the centrifugal blower fan blade wheel diameter can improve blower fan; But the increase of impeller diameter equally can be because of the increase of peripheral velocity, the increase that brings Rotation Noise, eddy flow noise; In addition, also can bring problems such as blower fan mechanical vibration increase, motor load increase.
At present, in the range hood industry, for obtaining big air quantity, big blast, the power of centrifugal blower is in continuous increase, and this all is disadvantageous to energy-saving and environmental protection.
In known technology, find as yet and can keep under the constant prerequisite of centrifugal blower fan blade wheel diameter, spiral case fluid channel dimensions, through improving impeller circumferential speed, and improve centrifugal blower air quantity, blast and efficient through other approach.
Summary of the invention
To the problems referred to above; The present invention proposes a kind of multiple wing type centrifugal blower fan of strengthening the air inlet function that has; This centrifugal blower can keep under the constant prerequisite of centrifugal blower fan blade wheel diameter, spiral case fluid channel dimensions; Do not increase the peripheral velocity of centrifugal blower fan blade wheel, really can reach the purpose that improves centrifugal blower air quantity, blast and efficient.
The present invention is achieved in that
Have the multiple wing type centrifugal blower fan of strengthening the air inlet function, be made up of blower fan main body and centrifugal impeller, vanes fixed is on impeller; And be uniformly distributed along the circumference, it is characterized in that: described blade, at the blade inlet end; Its leading edge is made up of curve, or is made up of broken line, or is constituted by curve and straight line.
Preferably, the blade leading edge is spill, or is convex, or is concave, convex combination shape, or is angular surface type.
Preferably, described blade, at the blade exhaust end, its exhaust limit is made up of straight line, or is made up of curve, or is made up of broken line, or is constituted by curve and straight line.
Can know that from the flow continuity equation of gas under the situation that impeller intake velocity and leaving area remain unchanged, increase impeller air inlet area, then the impeller exhaust velocity increases.The present invention is not increasing rotor diameter and is not changing under the situation of spiral case fluid channel dimensions just according to this principle, through changing the shape of blade leading edge, increases impeller suction port area, thereby reaches the purpose that improves fan delivery, blast and efficient; In addition,, increase the area of contact of blade and air-flow, the moment of momentum of fluid is increased, air quantity, blast, the efficient of centrifugal blower are improved through changing blade inlet and outlet limit shape.
The present invention can reach following beneficial effect:
1, adopts unconventional " special-shaped blade " structure; The gas flowfield at impeller inlet place is significantly improved, and gas flow loss and fan noise obviously reduce, and the impeller inlet area increases; Impeller outlet speed improves, and the air quantity of centrifugal blower, blast and efficient are significantly improved.
2, " special-shaped blade " of the present invention has multiple structure, can satisfy the multiple wing type centrifugal blower fan requirement of different structure and performance, and be of many uses.
3, the present invention provides a kind of new approach to improving centrifugal blower air quantity, blast, efficient and reducing fan noise, not only energy-saving and environmental protection, and also simple in structure, cost is low, and is easy to implement; Centrifugal blower of the present invention can be applicable to multiple field, has vast market prospect.
4, centrifugal blower of the present invention can significantly improve air quantity, blast and the efficient of range hood, and can obviously reduce the noise of range hood, and the energy-saving and environmental protection effect is remarkable.
Description of drawings
Fig. 1～5th, the structural representation of exemplary embodiments 1～4 of the present invention, wherein:
Fig. 1 is the structural representation (sectional view) of the multiple wing type centrifugal blower fan of exemplary embodiments 1 of the present invention, and the blade leading edge is made up of straight line and curve among the figure, and is spill; Blade exhaust limit is made up of straight line.
Fig. 2 is the perspective view of embodiment 1 multiple wing type centrifugal blower fan impeller.
Fig. 3 is the perspective view of embodiment 2 multiple wing type centrifugal blower fan impeller; The blade leading edge is made up of curve, and undulate (a kind of form of concave, convex combination shape); Blade exhaust limit is made up of straight line.
Fig. 4 is the perspective view of embodiment 3 multiple wing type centrifugal blower fan impeller; The blade leading edge is made up of broken line, and L-shaped (the another kind of form of concave, convex combination shape); Blade exhaust limit is made up of straight line.
Fig. 5 is the perspective view of embodiment 4 multiple wing type centrifugal blower fan impeller; The blade leading edge is made up of curve, is spill; Blade exhaust limit is made up of undulate curve.
Embodiment
Below in conjunction with embodiment's accompanying drawing and embodiment, be described in detail embodiment of the present invention:
Embodiment 1
Like Fig. 1, shown in Figure 2, have the multiple wing type centrifugal blower fan of strengthening the air inlet function, form by blower fan main body 1 and centrifugal impeller 2; Blade 21 is fixed on the impeller, and is uniformly distributed along the circumference, and more concrete is; Described blade, blade leading edge 201 is made up of straight line and curve, and is spill; Blade exhaust limit 202 is made up of straight line.
As shown in Figure 3, present embodiment and embodiment's 1 difference only be, blade leading edge 201 is made up of curve, and undulate.
Embodiment 3
As shown in Figure 4, present embodiment and embodiment's 1 difference only be, blade leading edge 201 is made up of broken line, and L-shaped.
Embodiment 4
As shown in Figure 5, present embodiment and embodiment's 1 difference only be, blade leading edge 201 is made up of curve, is matrix; Blade exhaust limit is made up of undulate curve.
The foregoing description only is a part of typical structure of the present invention, and the dependency structure of not enumerating is protected by the present invention all.
Claims (3)
1. have the multiple wing type centrifugal blower fan of strengthening the air inlet function, be made up of blower fan main body (1) and centrifugal impeller (2), vanes fixed is on impeller; And be uniformly distributed along the circumference; It is characterized in that: described blade, at the blade inlet end, its leading edge (201) is made up of curve; Or constitute, or constitute by curve and straight line by broken line.
2. the multiple wing type centrifugal blower fan with reinforcement air inlet function according to claim 1, it is characterized in that: blade leading edge (201) is spill, or is convex, or is concave, convex combination shape, or is angular surface type.
3. the multiple wing type centrifugal blower fan with reinforcement air inlet function according to claim 1 is characterized in that: described blade, at the blade exhaust end; Its exhaust limit (202) is made up of straight line; Or constitute by curve, or constitute by broken line, or constitute by curve and straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205405311U CN202360458U (en) | 2011-12-15 | 2011-12-15 | Multi-wing centrifugal fan with reinforced air inlet function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205405311U CN202360458U (en) | 2011-12-15 | 2011-12-15 | Multi-wing centrifugal fan with reinforced air inlet function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202360458U true CN202360458U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205405311U Expired - Fee Related CN202360458U (en) | 2011-12-15 | 2011-12-15 | Multi-wing centrifugal fan with reinforced air inlet function |
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| CN (1) | CN202360458U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536892A (en) * | 2012-03-10 | 2012-07-04 | 广东恒业电器有限公司 | Multi-blade centrifugal fan with reinforced air inlet function |
| CN103727061A (en) * | 2013-12-24 | 2014-04-16 | 海信容声(广东)冰箱有限公司 | Centrifugal fan |
| CN109944828A (en) * | 2019-04-01 | 2019-06-28 | 青岛海尔智能技术研发有限公司 | A kind of centrifugal blower and electric appliance |
-
2011
- 2011-12-15 CN CN2011205405311U patent/CN202360458U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536892A (en) * | 2012-03-10 | 2012-07-04 | 广东恒业电器有限公司 | Multi-blade centrifugal fan with reinforced air inlet function |
| CN103727061A (en) * | 2013-12-24 | 2014-04-16 | 海信容声(广东)冰箱有限公司 | Centrifugal fan |
| CN109944828A (en) * | 2019-04-01 | 2019-06-28 | 青岛海尔智能技术研发有限公司 | A kind of centrifugal blower and electric appliance |
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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 |
Granted publication date: 20120801 Termination date: 20141215 |
|
| EXPY | Termination of patent right or utility model |