CN103185036A - Axial fan and air conditioner with same - Google Patents
Axial fan and air conditioner with same Download PDFInfo
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- CN103185036A CN103185036A CN2011104510137A CN201110451013A CN103185036A CN 103185036 A CN103185036 A CN 103185036A CN 2011104510137 A CN2011104510137 A CN 2011104510137A CN 201110451013 A CN201110451013 A CN 201110451013A CN 103185036 A CN103185036 A CN 103185036A
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- 238000005452 bending Methods 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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Abstract
The invention provides an axial fan and an air conditioner with the same. According to the axial fan, a side face of a hub comprises a third side face, which is a part of the outer surface of a frustum with two end radiuses being r and R respectively, and one end of the third side face is connected with a first side face; the first side face is the vertical face of an axial line passing through the hub, and the other end of the first side face is connected with a second side face; the projection of the second side face along the axial line direction of the hub is a first arc line gradually opened relative to the axle center of the hub, and a distance from any one point on the first arc line to the axial line of the hub is greater than or equal to r and is less than or equal to R. The air conditioner comprises the axial fan. According to the axial fan and the air conditioner with the same, the air inlet area of the axial fan is effectively increased, and the air quantity of the axial fan can be effectively improved without increasing noise. The cost of manufacturing materials of the axial fan is effectively reduced, weight is reduced, and power loss is reduced.
Description
Technical field
The present invention relates to filed of air conditioning, more specifically, relate to a kind of axial fan and have its air conditioner.
Background technique
Various axial fans generally are used in air conditioner outdoor machine or other air regenerating devices, play the effect that circulates of air.Existing air conditioner axial fan as shown in Figure 1, its basic structure comprises the circular hub 10 with rotating center and is distributed in wheel hub 10 peripheries and side is several fins 20 of radial arrangement, wherein fin 20 has aerofoil 21, wing sweepforward 22 and wing trailing edge 24, and its wing trailing edge 24 is slightly linearly.By the motor driving rotation, air flows into from the front edge of fin 20, flows out by the wing trailing edge 24 of aerofoil 21 boosted backs by fin 20.
Existing air-conditioning outer machine is used low pressure axial-flow fan always, and it is except the claimed structure compactness, outside air quantity is big, and the low important index very especially of noise.And the axial-flow blower noise is mainly aerodynamic noise, and it is made up of two-part: i.e. rotational noise and eddy current crack.Wherein, the relatively large eddy current that comes off of axial-flow leaf trailing edge existence is the chief component of eddy current crack.Studies show that in this of blower fan two noise likes, 10 powers of the peripheral velocity of rotational noise and impeller are proportional; 6 powers of eddy current crack and impeller circumferential speed (or 5 powers) are proportional.
In order to lower these noises, normally the airfoil of designing optimal, adopt the fin of the good wing blade of aerodynamic quality.But in these quietization methods, still there are many problems relatively outstanding and be difficult to solve.Such as, the distortion aerofoil profile that adopts inlet angle radially to reduce gradually in order to reduce the inlet air flow incidence loss, but its prerequisite of calculating inlet angle is that the supposition inlet air flow is for axially flowing to uniformly fin, in fact the charge air flow of fan is a kind of free flow field, distribution form is the flow field of confluxing, so such design method still has bigger incidence loss concerning fan blade.
And for example, prior art discloses following scheme, has towards the bulge of fin sense of rotation rear side (air outflow side) in the design of the hinder marginal part of fin.Described bulge is to be recessed to form to flowing out the opposite importing direction (the sense of rotation front side of fin) of direction with air by the profile line that makes the fin hinder marginal part (connecting the inner circumference edge of wing hinder marginal part and the line of outer periphery).Because the fin bulge that hinder marginal part is formed with of this form, the air that flows out from this position can produce whirlpool at the bulge rear, thereby the air-supply noise will increase.
To sum up, under the certain situation of blower fan diameter, rotating speed more strong noise is more big.Therefore to guarantee that reducing the air-conditioning outer machine fan noise and improving its efficient is current a great problem under air quantity, blast is constant and fan diameter does not increase the situation.
Summary of the invention
The object of the invention be to provide a kind of simple in structure, can effectively improve air quantity of fan and reduce the axial fan of noise effectively and have its air conditioner.
According to an aspect of the present invention, a kind of axial fan is provided, comprise wheel hub and the fin that is arranged on the wheel hub, fin has suction surface and pressure side, the side of wheel hub comprises first side, second side and the 3rd side, wherein, the 3rd side is respectively the part of outer surface of the frustum of r and R for the two ends radius, and the one end is connected with first side; First side was the vertical plane of the axis of wheel hub, and the other end of first side is connected with second side; Second side is at first camber line of gradually opening along the axle center that is projected as relative wheel hub on the axial direction of wheel hub, on first camber line arbitrarily a bit to the distance of the axis of wheel hub more than or equal to r and smaller or equal to R, second side is connected with the other end of the 3rd side.
Further, the intersection that an end of second side is connected with first side is first intersection, and first intersection is parallel to the axis of wheel hub.
Further, the intersection of second side and the 3rd side is second intersection, the starting point of second intersection and terminal point respectively last radius and following radius be respectively R and r frustum on circumference and the following circumference.
Further, fin is connected along second intersection with wheel hub.
Further, the intersection of the 3rd side and first side is the 3rd intersection, and the 3rd intersection is straight line or is the broken line that two intersecting straight lines are formed.
Further, fin comprises front edge and hinder marginal part, and hinder marginal part has hinder marginal part root and the hinder marginal part periphery of abutment bosses, and hinder marginal part is provided with bending part, and bending part extends on hinder marginal part and along hinder marginal part.
Further, bending part extends to the hinder marginal part periphery from the hinder marginal part root.
Further, the height of bending part reduces gradually along the direction from the hinder marginal part root to the hinder marginal part periphery.
Further, the height of the peak of bending part is h, and the chord length of the aerofoil of living in of the peak of bending part is s, wherein, and 0.02≤h/s≤0.04.
Further, bending part is towards pressure side one side bending.
Further, hinder marginal part has wing sweepforward, and bending part seamlessly transits with hinder marginal part at the flangikng place of wing sweepforward and engages.
Further, place, flangikng place aerofoil diameter is d2, and the diameter of the least significant end aerofoil of living in of hinder marginal part periphery is d1, wherein, and 0.8≤d2/d1≤1.
Further, the quantity of the side of wheel hub is 3 or 4, and each side includes first side, second side and the 3rd side.
According to an aspect of the present invention, also provide a kind of air conditioner, comprised aforesaid axial fan.
Adopt axial fan of the present invention and have its air conditioner, the side of wheel hub comprises first side, second side and the 3rd side, first side was the vertical plane of the axis of wheel hub, one end of second side is connected with first side, first camber line that second side being projected as on horizontal plane gradually opened, on first camber line arbitrarily a bit to the distance of the axis of wheel hub more than or equal to r and smaller or equal to R, wherein, r is less than R, second side is connected with an end of the 3rd side, the 3rd side is respectively the part of outer surface of the frustum of r and R for the two ends radius, its other end is connected with first side.This structure has increased the incoming air area of axial fan effectively, can improve the air quantity of axial fan under the prerequisite that does not increase noise effectively.And reduced the making cost of material of axial fan effectively, reduced weight, reduced power consumption.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of existing axial fan;
Fig. 2 is the Facad structure schematic representation according to axial fan of the present invention;
Fig. 3 is the stravismus structural representation of Fig. 2;
Fig. 4 is the wheel hub structure schematic representation according to axial fan of the present invention;
Fig. 5 is the lines formation schematic representation according to the wheel hub of axial fan of the present invention;
Fig. 6 is the tab construction schematic representation according to axial fan of the present invention;
Fig. 7 is according to the cross section structure of the fin of axial fan of the present invention and the enlarged view of hinder marginal part thereof;
Fig. 8 is according to axial fan of the present invention and existing axial fan air quantity-rotation speed relation schematic representation; And
Fig. 9 concerns schematic representation according to axial fan of the present invention and existing axial fan noise-air quantity.
Embodiment
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figures 2 and 3, according to axial fan of the present invention, comprise wheel hub 10 and the fin 20 that is arranged on the wheel hub 10, fin 20 has suction surface a and pressure side b, fin 20 comprises front edge 22 and hinder marginal part 24, hinder marginal part 24 has hinder marginal part root 24A and the hinder marginal part periphery 24B of abutment bosses 10, and hinder marginal part 24 is provided with bending part 25, and bending part 25 extends to hinder marginal part periphery 24B from hinder marginal part root 24A.
As shown in Figure 4, the side c of wheel hub 10 of the present invention comprises the first side c1, the second side c2 and the 3rd side c3, cross the axis of wheel hub 10 on the elongated surfaces of the first side c1 that is vertical plane, the end of the second side c2 is connected with the first side c1, the first camber line H1 (referring to Fig. 5) that the second side c2 is gradually opening along the axle center that is projected as relative wheel hub 10 on the axial direction of wheel hub 10, the first camber line H1 goes up the distance of the axis that a bit arrives wheel hub 10 arbitrarily more than or equal to r and smaller or equal to R, wherein, r is less than R, in the present embodiment, the distance of the start point distance axis of the first camber line H1 is r, and its terminal point is R apart from the distance of axis.The second side c2 is connected with the end of the 3rd side c3, and the 3rd side c3 is respectively the part of outer surface of the frustum of r and R for the two ends radius, and its other end is connected with the first side c1.This structure has increased the incoming air area of axial fan effectively, can improve the air quantity of axial fan under the prerequisite that does not increase noise effectively.And reduced the making cost of material of axial fan effectively, reduced weight, reduced power consumption.
In the present embodiment, three side c that the outside of wheel hub 10 connects by joining end to end form, and each side includes the first side c1, the second side c2 and the 3rd side c3.In other embodiments, wheel hub 10 comprises four side c, and each side includes the first side c1, the second side c2 and the 3rd side c3.
Fig. 5 shows the forming process of the side of wheel hub 10:
1, be respectively diameter with D1, D2 and do circle, and be the last bottom surface of frustum with two circles of gained, wherein, D1=2*R, D2=2*r;
2, with diameter D4=0.25*D1 draw circles, and draw corresponding equilateral triangle, its three summit A, B, C are the center of circle of three tangent planes;
3, distance L 1=D1-D2/2 between flat circle and lower plane are justified on the wheel hub;
4, be L2 to maximum distance between the lower plane circle a bit arbitrarily in three summits of equilateral triangle, L2=(D2+D4)/2;
5, be the center of circle, draw circular arc with diameter D3=2*L2 with certain summit of equilateral triangle, wherein this circular arc and the perpendicular bisector of crossing this summit and go up the zone that flat circle, lower plane circle form and be cut-away area c '.
As shown in Figure 4, the intersection that the end of the second side c2 is connected with the first side c1 is the first intersection L1, and the first intersection L1 is parallel to the axis of wheel hub 10.
As shown in Figure 4, the intersection of the second side c2 and the 3rd side c3 is the second intersection L2, the starting point of the second intersection L2 and terminal point respectively last radius and following radius be respectively R and r frustum on circumference and the following circumference.The second intersection L2 is the camber line between the second side c2 and the 3rd side c3.Wherein, fin 20 is connected on the second intersection L2 with wheel hub 10.
As shown in Figure 4, the intersection of the 3rd side c3 and the first side c1 is the 3rd intersection L3, and the 3rd intersection L3 is straight line or is the broken line that two intersecting straight lines are formed.The 3rd intersection L3 can or be broken line for straight line according to the position of intersecting of the 3rd side c3 and the first side c1.
Axial fan of the present invention, hinder marginal part 24 at each fin 20 arranges bending part 25, tablet that bending part 25 installs additional to direction along exhibition for fin 20 trailing edges and that tilt towards pressure side b, to hinder marginal part periphery 24B place, the bending part height reduces along with the increase of its fin 20 diameters of living in its radial length scope gradually from the hinder marginal part root 24A of the nearly wheel hub of fin 20 trailing edges.This bending part 20 is set has increased effective camber at fin 20 trailing edge places, increase the momentum of fin 20 trailing edge place air-flows, thereby make air-flow overcome the adverse pressure gradient at pressure side b trailing edge place easily, make the separated region of pressure side b reduce, profile lift increases, under the situation that the constant and fan diameter of blast does not increase, can effectively improve the air quantity of axial fan, and can reduce noise.
In an embodiment of the present invention, axial fan is three wings formula axial fan, comprise the wheel hub 10 as running shaft, reach three fins 20 with same shape that radially distribute at its outer circumferential side, and three fins are in 120 ° ± 5 ° scope equidistantly or the unequal-interval distribution.The height of bending part 25 reduces gradually along the direction from hinder marginal part root 24A to hinder marginal part periphery 24B.
Preferably, referring to Fig. 6, the height of the peak of bending part 25 is h (h does not indicate in the drawings), and the chord length of the aerofoil of living in of the peak of bending part 25 is s, wherein, and 0.02≤h/s≤0.04.Bending part 25 is towards pressure side b one side bending.
Bending part 25 tilts towards pressure side b, a suitable height and the bending sheet zone angled with the string of a musical instrument of aerofoil profile 20 that it installs additional along exhibition to bearing of trend for fin 20 trailing edges.The height of the peak of bending part 25 be the corresponding fin 20 of peak aerofoil chord length length 2%～4%.As shown in Figure 7, the angle of the peak of bending part 25 and place aerofoil chord length is θ, wherein 24 °≤θ≤90 °.Fan aerofoil trailing edge bending part 25 according to above-mentioned condition formation, the suction surface a of fin 20 and the pressure distribution on the pressure side b have been improved effectively, increased effective camber of fin 20, thereby increased the circular rector of streaming fin 20, obviously improved the lift coefficient of fin 20, and its ratio of lift coefficient to drag coefficient is improved a lot, reach the requirement that increases air quantity and reduce noise.
According to the embodiment of an optimum of the present invention, hinder marginal part 24 has wing sweepforward 22, and bending part 25 seamlessly transits with hinder marginal part 24 at the 25B of the flangikng place of wing sweepforward 22 and engages.The 25B of flangikng place aerofoil diameter of living in is d2, and the diameter of the least significant end aerofoil of living in of hinder marginal part periphery 24B is d1, wherein, and 0.8≤d2/d1≤1.Other parameters in the present embodiment are identical with previous embodiment.
As Fig. 8 and shown in Figure 9, compare with existing axial fan, according to the bending part 25 that above-mentioned condition forms, reached the requirement that increases air quantity and reduce noise effectively.
The present invention also provides a kind of air conditioner, comprises aforesaid axial fan.
Axial flow fan structure of the present invention is simple, can effectively improve air quantity of fan and reduce noise effectively, has improved the rate of heat exchange of system, can satisfy the requirement of quietization and the environmental protectionization of air conditioner.
Axial fan of the present invention also can be used for other heat-exchange systems.
As can be seen from the above description, the above embodiment of the present invention has realized following technique effect:
Axial fan of the present invention and have its air conditioner has increased the incoming air area of axial fan effectively, can improve the air quantity of axial fan under the prerequisite that does not increase noise effectively.And reduced the making cost of material of axial fan effectively, reduced weight, reduced power consumption.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. axial fan, comprise wheel hub (10) and be arranged on fin (20) on the described wheel hub (10), described fin (20) has suction surface (a) and pressure side (b), it is characterized in that, the side (c) of described wheel hub (10) comprises first side (c1), second side (c2) and the 3rd side (c3), wherein
Described the 3rd side (c3) is respectively the part of outer surface of the frustum of r and R for the two ends radius, the one end is connected with first side (c1);
Described first side (c1) was the vertical plane of the axis of described wheel hub (10), and the other end of described first side (c1) is connected with second side (c2);
Described second side (c2) is at first camber line of gradually opening along the axle center that is projected as described relatively wheel hub (10) on the axial direction of described wheel hub (10) (H1), described first camber line (H1) is gone up the distance of the axis that a bit arrives described wheel hub (10) arbitrarily more than or equal to r and smaller or equal to R, and described second side (c2) is connected with the other end of described the 3rd side (c3).
2. axial fan as claimed in claim 1 is characterized in that, the intersection that an end of described second side (c2) is connected with described first side (c1) is first intersection (L1), and described first intersection (L1) is parallel to the axis of described wheel hub (10).
3. axial fan as claimed in claim 1, it is characterized in that, the intersection of described second side (c2) and the 3rd side (c3) is second intersection (L2), the starting point of described second intersection (L2) and terminal point respectively last radius and following radius be respectively R and r frustum on circumference and the following circumference.
4. axial fan as claimed in claim 3 is characterized in that, described fin (20) is connected along described second intersection (L2) with described wheel hub (10).
5. axial fan as claimed in claim 1 is characterized in that, described the 3rd side (c3) is the 3rd intersection (L3) with the intersection of described first side (c1), and described the 3rd intersection (L3) is straight line or is the broken line that two intersecting straight lines are formed.
6. axial fan according to claim 1, it is characterized in that, described fin (20) comprises front edge (22) and hinder marginal part (24), described hinder marginal part (24) has in abutting connection with hinder marginal part root (24A) and the hinder marginal part periphery (24B) of described wheel hub (10), described hinder marginal part (24) is provided with bending part (25), and described bending part (25) upward and along described hinder marginal part (24) extends at described hinder marginal part (24).
7. axial fan according to claim 6 is characterized in that, described bending part (25) extends to described hinder marginal part periphery (24B) from described hinder marginal part root (24A).
8. axial fan according to claim 6 is characterized in that, the height of described bending part (25) reduces gradually along the direction from described hinder marginal part root (24A) to described hinder marginal part periphery (24B).
9. axial fan according to claim 8 is characterized in that, the height of the peak of described bending part (25) is h, and the chord length of the aerofoil at the peak place of described bending part (25) is s, wherein, and 0.02≤h/s≤0.04.
10. axial fan according to claim 6 is characterized in that, described bending part (25) is towards described pressure side (b) side bending.
11. axial fan according to claim 6 is characterized in that, described hinder marginal part (24) has wing sweepforward (22), and described bending part (25) seamlessly transits with described hinder marginal part (24) at the flangikng place of described wing sweepforward (22) (25B) and engages.
12. axial fan according to claim 11 is characterized in that, the aerofoil diameter at described flangikng place (25B) is d2, and the aerofoil diameter at the least significant end place of described hinder marginal part periphery (24B) is d1, wherein, and 0.8≤d2/d1≤1.
13. axial fan according to claim 1, it is characterized in that, the quantity of the described side (c) of described wheel hub (10) is 3 or 4, and each described side (c) includes described first side (c1), described second side (c2) and described the 3rd side (c3).
14. an air conditioner comprises axial fan, it is characterized in that, described axial fan is each described axial fan in the claim 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110451013.7A CN103185036B (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110451013.7A CN103185036B (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
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| Publication Number | Publication Date |
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| CN103185036A true CN103185036A (en) | 2013-07-03 |
| CN103185036B CN103185036B (en) | 2015-06-03 |
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| CN201110451013.7A Active CN103185036B (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106545521A (en) * | 2017-01-16 | 2017-03-29 | 江苏汇创机电科技股份有限公司 | A kind of brshless DC motor noise reduction impeller |
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| CN101835990A (en) * | 2007-10-25 | 2010-09-15 | Lg电子株式会社 | Fan |
| CN202418036U (en) * | 2011-12-28 | 2012-09-05 | 珠海格力电器股份有限公司 | Axial flow fan and air conditioner with same |
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| US20040223848A1 (en) * | 2003-05-05 | 2004-11-11 | Yung-Yu Chiu | Axial-flow fan structure |
| JP2006177205A (en) * | 2004-12-21 | 2006-07-06 | Toshiba Kyaria Kk | Axial fan, outdoor unit for air conditioner |
| JP2007024004A (en) * | 2005-07-21 | 2007-02-01 | Daikin Ind Ltd | Axial fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103185036B (en) | 2015-06-03 |
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Effective date of registration: 20160412 Address after: 230088 Anhui city of Hefei province high tech Zone Parkinson weir Science Park Road No. 208. Patentee after: GREE ELECTRIC(HEFEI) Co.,Ltd. Address before: 519070 Guangdong city of Zhuhai Province Qianshan No. six Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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Effective date of registration: 20180425 Address after: No. six, Qianshan Jinji West Road, Zhuhai, Guangdong Province Co-patentee after: GREE ELECTRIC(HEFEI) Co.,Ltd. Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Co-patentee after: GREE ELECTRIC APPLIANCE (WUHU) Co.,Ltd. Address before: 230088 208, Ming Chuan Road, Anhui science and Technology Park, Hefei high tech Zone Patentee before: GREE ELECTRIC(HEFEI) Co.,Ltd. |