CN202579308U - Axial fan - Google Patents
Axial fan Download PDFInfo
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- CN202579308U CN202579308U CN201220074975.5U CN201220074975U CN202579308U CN 202579308 U CN202579308 U CN 202579308U CN 201220074975 U CN201220074975 U CN 201220074975U CN 202579308 U CN202579308 U CN 202579308U
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- fan
- wheel hub
- axial fan
- fan blade
- trapezoidal
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- 230000003292 diminished effect Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000388002 Agonus cataphractus Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to an axial fan which comprises a wheel hub and three fan blades arranged on the wheel hub, wherein the three fan blades are distributed at equal distance by taking the fan blade rotating central axis as the center, each fan blade is provided with a tail edge and a front edge opposite to the tail edge, the tail edge of each fan blade is sequentially provided with three ladder-shaped grooves of which the depths are gradually diminished along the direction from the external to the wheel hub, and short edges in ladder-shaped bottom edges of the three ladder-shaped grooves are adjacent to the front edge of each fan blade. According to the axial fan, the separation of a boundary layer can be wholly reduced, the radial flow can be well reduced, the air quantity can be provided by reducing the tail trace of a rotor, the happening of phenomena such as swirl and turbulent flow can be reduced, the air quantity and the efficiency of the axial fan can be effectively improved, the weight of the fan can be reduced, and the comprehensive cost can be further reduced. Due to the characteristics, the axial fan can be preferably suitable for an air conditioner external unit, and the refrigerating capacity, the heating capacity and the energy efficiency ratio of an air conditioner can be improved.
Description
Technical field
The utility model relates to the axial fan technical field, relates in particular to a kind of axial fan that is suitable for air conditioner outdoor machine.
Background technique
At present, the outdoor unit of room air conditioner is to adopt axial fan basically, and the fan blade of axial fan is made up of the 2-6 leaf usually.Air quantity is big though axial fan has, low noise advantages.But the design of axial fan has direct influence to the performance parameters such as refrigerating capacity, heating capacity and Energy Efficiency Ratio of air conditioner.Thereby the optimal design of axial fan is most important to the performance of air conditioner.
Conventional axial fan, its air quantity is directly proportional with fan blade quantity, and fan blade quantity is many more; The big air quantity of then easier acquisition, still, fan blade quantity cost more at most is high more; And processing is more complicated, and in addition, fan blade quantity is many; Also will increase motor load and input power consumption, thereby electric efficiency is descended, influence the Energy Efficiency Ratio of air-conditioning.On the contrary, when fan blade quantity reduced, though processing becomes simply, cost reduced, and air quantity also can reduce, and influences the air conditioner machine performance.Simultaneously, fan blade quantity is few more, and the rotating speed of fan also can increase, and the noise of generation also can improve.Therefore, when the design fan, need take all factors into consideration from aspects such as balance air quantity, noise and costs.
Though also there is the design proposal of axial fan in the existing technology; The manufacture cost that can suppress fan noise and reduction fan; But all do not take all factors into consideration above-mentioned factor, comprehensively improve optimal design, thereby can't improve the performance of axial fan on the whole.
The model utility content
The main purpose of the utility model is to provide a kind of axial fan that improves the axial fan overall performance.
In order to achieve the above object; The utility model proposes a kind of axial fan; Comprise wheel hub and be installed at least three fan blades on the said wheel hub, said at least three fan blades are the center with fan blade rotating center axis, are equidistant distribution; Said fan blade has trailing edge and the leading edge relative with said trailing edge; The trailing edge of said fan blade is disposed with three trapezoidal grooves by outside to wheel hub direction, and the degree of depth of said three trapezoidal grooves is diminished by outside to wheel hub direction gradually, and the minor face in the trapezoidal base of said trapezoidal groove is near said leading edge.
Preferably, by outside to wheel hub direction, in the two adjacent said trapezoidal grooves, less trapezoidal groove area is 1/3～1/2 of a bigger trapezoidal groove area.
Preferably, said three trapezoidal grooves are isosceles trapezoid, and are dwindled with predetermined ratio by outside to wheel hub direction.
Preferably, the upper base span that is positioned at the said trapezoidal groove of ragged edge is: 1/10* (H1-H2)～1/3* (H1-H2); The span of going to the bottom is: 1/18*H1～1/4*H1, and wherein, H1 is the distance of the trailing edge extreme lower position of said fan blade to the leading edge extreme higher position; H2 is the thickness of said wheel hub.
Preferably, the upper base that is positioned at the said trapezoidal groove of ragged edge is 1/6* (H1-H2); Go to the bottom and be 1/8*H1.
Preferably, two interior angles of going to the bottom of said three trapezoidal grooves are more than or equal to 100 degree.
Preferably, two interior angles of going to the bottom of said three trapezoidal grooves equal 120 degree.
Preferably, the rotating diameter of said fan blade is 2.5*H2～3.5*H2, and wherein, H2 is the thickness of said wheel hub.
Preferably, the height of the trapezoidal groove in the middle of equaling near the height of the trapezoidal groove of wheel hub is half the.
Preferably, said fan blade profile is sickle shaped wide outside and narrow inside, and is the three dimensional space distorted shape.
A kind of axial fan that the utility model proposes sets gradually three trapezoidal grooves at the trailing edge of fan blade by outside to wheel hub direction, and three trapezoidal grooves is diminished by outside to wheel hub direction gradually; Reduced the separation of boundary layer on the whole, and reduced Radial Flow well, reducing the rotor tail provides air quantity; Reduce the generation of vortex and flow-disturbing; Can effectively improve air quantity, the efficient of axial fan, and can alleviate the weight of fan, and then reduce overall cost; Above-mentioned characteristic makes axial fan can be applicable to air conditioner outdoor machine preferably, and can improve refrigerating capacity, heating capacity and the Energy Efficiency Ratio of air conditioner.
Description of drawings
Fig. 1 is the Facad structure schematic representation of the utility model axial fan preferred embodiment.
Clearer for the technological scheme that makes the utility model, clear, will combine accompanying drawing to do further to detail below.
Embodiment
As shown in Figure 1, Fig. 1 is the Facad structure schematic representation of the utility model axial fan preferred embodiment.
A kind of axial fan that present embodiment proposes; Comprise wheel hub 101 and be installed in three fan blades 102 on the wheel hub 101; Three fan blades 102 are the center with fan blade 102 rotating center axis; Be equidistant distribution with 120 degree ± 5 degree, fan blade 102 profiles are reaping hook shape wide outside and narrow inside, and are the three dimensional space distorted shape.
Wherein, the edge that is positioned at the reaping hook afterbody is the trailing edge 106 of fan blade 102, with the trailing edge of fan blade 102 106 relatively and the arc limit that is positioned at the indent of reaping hook point of a knife side be the leading edge 107 of fan blade 102.
In the present embodiment, on the trailing edge 106 of fan blade 102, be disposed with three trapezoidal grooves 103,104,105 from the outside to the radial direction of wheel hub 101.Three trapezoidal grooves 103,104,105 all cave in to the leading edge 107 of fan blade 102; And in three trapezoidal grooves 103,104,105; Minor face in the trapezoidal base of each trapezoidal groove 103,104,105 is near the leading edge 107 of fan blade 102; That is to say that each trapezoidal groove 103,104,105 is groove shapes wide at the top and narrow at the bottom.In addition, the degree of depth of three trapezoidal grooves 103,104,105 is diminished by outside to wheel hub 101 directions gradually, and the top margin of three trapezoidal grooves 103,104,105 is on a line.
Particularly, in the present embodiment, three trapezoidal grooves 103,104,105 on the trailing edge 106 are isosceles trapezoid, and are dwindled with predetermined ratio by outside to wheel hub 101 directions.This predetermined ratio can be set at 1/3～1/2, thus, makes in the two adjacent trapezoidal grooves, and less trapezoidal groove 104 areas are 1/3～1/2 of bigger trapezoidal groove 103 areas, and wherein the preferred proportion value is 1/2.
Said structure can reduce the Radial Flow of fan, reduces the fan propeller tail, improves air quantity of fan; And the generation of reduction vortex and flow-disturbing, improve fan static pressures and efficient simultaneously, reduce fan power consumption and noise; And can reduce the material use amount of fan blade 102, thereby reduce cost of material.
In order better to improve the performance of fan on the whole, present embodiment carries out following optimal design to the rotating diameter of fan blade 102 and the physical dimension of three trapezoidal grooves 103,104,105.
Particularly, as shown in Figure 1, Fig. 1 shows the height of axial fan, and promptly the rotating diameter of fan blade 102 is represented with D1; Also show the distance of trailing edge 106 extreme lower positions of fan blade 102, represent with H1 to leading edge 107 extreme higher positions.
Wherein, above-mentioned trailing edge 106 extreme lower positions are meant that falculate fan blade 102 is positioned at the position of reaping hook afterbody lowest part; Leading edge 107 extreme higher positions are meant that falculate fan blade 102 is positioned at the highest position of reaping hook nose part.
Present embodiment is set the rotating diameter D1=2.5*H2～3.5*H2 of fan blade 102, and wherein, H2 is the thickness (not shown) of wheel hub 101.
The upper base span that simultaneously, will be positioned at the trapezoidal groove 103 of ragged edge is set at: 1/10* (H1-H2)～1/3* (H1-H2); The span of going to the bottom is set at 1/18*H1～1/4*H1, and wherein, H1 is the distances of trailing edge 106 extreme lower positions of fan blade 102 to leading edge 107 extreme higher positions; H2 is the thickness of wheel hub 101.
Preferably, it is preferable to be positioned at the upper base value 1/6* (H1-H2) of trapezoidal groove 103 of ragged edge; 1/8*H1 is preferable for the value of going to the bottom.
In addition, two interior angles of going to the bottom of also setting three trapezoidal grooves 103,104,105 are more than or equal to 100 degree, and wherein, preferred 120 spend.
The said structure characteristics of present embodiment have reduced the separation of boundary layer on the whole, and well reduce the Radial Flow of fan; Reduce the fan propeller tail and improve air quantity of fan; Reduce the generation of vortex and flow-disturbing, can effectively improve the air quantity and the efficient of axial fan, reduce fan power consumption and noise; And can alleviate the weight of fan; And then the reduction overall cost, above-mentioned characteristic makes axial fan can be applicable to air conditioner outdoor machine preferably, and can improve refrigerating capacity, heating capacity and the Energy Efficiency Ratio of air conditioner.
The system performance testing comparing result of present embodiment axial fan and existing axial fan is as shown in table 1 below:
Table 1
Can find out from the test data of last table 1, compare existing technology, the above-mentioned axial flow fan structure of present embodiment; Through reducing Radial Flow; Reduce axial fan rotor tail, can effectively improve air quantity, the efficient of axial fan, reduce the generation of vortex and flow-disturbing; Improve fan static pressures and efficient, reduce fan power consumption, noise and design cost; Simultaneously; Can alleviate the weight of fan, reduce the material use amount of fan blade, reduce cost of material; In addition; Can also reduce the material use amount of the load and the motor of motor, above-mentioned characteristic makes axial fan can be applicable to air conditioner outdoor machine preferably, and can improve refrigerating capacity, heating capacity and the Energy Efficiency Ratio of air conditioner; Comprehensively falling cost reaches more than 20%.
Need to prove; Above-mentioned trapezoidal groove 105 near wheel hub 101 also can be similar to the V-type groove or replaced by the V-type groove; If V-type groove; Then comparatively preferred mode is: make the both sides of this V-type groove constitute the both sides of equilateral triangle, and the height of V-type groove is height half the of the trapezoidal groove 104 that is adjacent.
In addition, being installed in the quantity of the fan blade 102 on the wheel hub 101 also can be according to the practical application scene setting more than three.
The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the utility model.
Claims (10)
1. an axial fan comprises wheel hub and is installed at least three fan blades on the said wheel hub, and said at least three fan blades are the center with fan blade rotating center axis; Be equidistant distribution; Said fan blade has trailing edge and the leading edge relative with said trailing edge, it is characterized in that
The trailing edge of said fan blade is disposed with three trapezoidal grooves by outside to wheel hub direction, and the degree of depth of said three trapezoidal grooves is diminished by outside to wheel hub direction gradually, and the minor face in the trapezoidal base of said trapezoidal groove is near said leading edge.
2. axial fan according to claim 1 is characterized in that, to said wheel hub direction, in the two adjacent trapezoidal grooves, less trapezoidal groove area is 1/3～1/2 of a bigger trapezoidal groove area by the outside.
3. axial fan according to claim 1 is characterized in that, said three trapezoidal grooves are isosceles trapezoid, and are dwindled with predetermined ratio by outside to wheel hub direction.
4. axial fan according to claim 3 is characterized in that, the upper base span that is positioned at the said trapezoidal groove of ragged edge is: 1/10* (H1-H2)～1/3* (H1-H2); The span of going to the bottom is: 1/18*H1～1/4*H1, and wherein, H1 is the distance of the trailing edge extreme lower position of said fan blade to the leading edge extreme higher position; H2 is the thickness of said wheel hub.
5. axial fan according to claim 4 is characterized in that, the upper base that is positioned at the said trapezoidal groove of ragged edge is 1/6* (H1-H2); Go to the bottom and be 1/8*H1.
6. axial fan according to claim 3 is characterized in that, two interior angles of going to the bottom of said three trapezoidal grooves are more than or equal to 100 degree.
7. axial fan according to claim 6 is characterized in that, two interior angles of going to the bottom of said three trapezoidal grooves equal 120 degree.
8. according to each described axial fan among the claim 1-7, it is characterized in that the rotating diameter of said fan blade is 2.5*H2～3.5*H2, wherein, H2 is the thickness of said wheel hub.
9. axial fan according to claim 8 is characterized in that, the height of the trapezoidal groove in the middle of equaling near the height of the trapezoidal groove of wheel hub half the.
10. axial fan according to claim 9 is characterized in that, said fan blade profile is sickle shaped wide outside and narrow inside, and is the three dimensional space distorted shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220074975.5U CN202579308U (en) | 2012-03-01 | 2012-03-01 | Axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220074975.5U CN202579308U (en) | 2012-03-01 | 2012-03-01 | Axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579308U true CN202579308U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220074975.5U Expired - Fee Related CN202579308U (en) | 2012-03-01 | 2012-03-01 | Axial fan |
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| Country | Link |
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| CN (1) | CN202579308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588338A (en) * | 2012-03-01 | 2012-07-18 | Tcl空调器(中山)有限公司 | Axial fan |
-
2012
- 2012-03-01 CN CN201220074975.5U patent/CN202579308U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588338A (en) * | 2012-03-01 | 2012-07-18 | Tcl空调器(中山)有限公司 | Axial fan |
| CN102588338B (en) * | 2012-03-01 | 2015-11-18 | Tcl空调器(中山)有限公司 | Axial fan |
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| 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: 20121205 Termination date: 20190301 |
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| CF01 | Termination of patent right due to non-payment of annual fee |