CN202579316U - Axial fan and air conditioner with same - Google Patents
Axial fan and air conditioner with same Download PDFInfo
- Publication number
- CN202579316U CN202579316U CN 201120563607 CN201120563607U CN202579316U CN 202579316 U CN202579316 U CN 202579316U CN 201120563607 CN201120563607 CN 201120563607 CN 201120563607 U CN201120563607 U CN 201120563607U CN 202579316 U CN202579316 U CN 202579316U
- Authority
- CN
- China
- Prior art keywords
- axial fan
- hinder marginal
- trailing edge
- wheel hub
- marginal part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005452 bending Methods 0.000 claims abstract description 40
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides an axial fan and have its air conditioner. According to the utility model discloses an axial fan, including wheel hub and fin, the fin has suction surface and pressure surface, and the fin includes leading edge portion and trailing edge portion, and trailing edge portion has trailing edge portion root and the trailing edge portion periphery that borders on wheel hub, is provided with the portion of bending on the trailing edge portion, and the portion of bending extends on the trailing edge portion and along the trailing edge portion. According to the utility model discloses an air conditioner, including aforementioned axial fan. The utility model discloses an axial fan and have its air conditioner, the portion of bending that sets up on axial fan's the trailing edge portion has increased the effective camber of fin trailing edge department and the momentum of air current, thereby make the air current overcome the adverse pressure gradient of pressure surface trailing edge department easily, make the separation region of pressure surface reduce, wing section lift increases, under the unchangeable condition with the fan diameter of wind pressure does not increase, can effectively improve axial fan's the amount of wind, and can reduce the noise, can satisfy the requirement of the mute and the environmental protection of air conditioner.
Description
Technical field
The utility model relates to filed of air conditioning, more specifically, relates to a kind of axial fan and has 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 as shown in Figure 1 is used axial fan; Its basic structure comprises 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 shape slightly linearly.Through the motor driving rotation, air flows into from the front edge of fin 20, and the wing trailing edge 24 by fin 20 after being boosted through aerofoil 21 quilts flows out.
Existing air-conditioning outer machine is used low pressure axial-flow fan always, and it is compact except claimed structure, 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, more a large amount of eddy current that comes off of axial-flow leaf trailing edge existence is the chief component of eddy current crack.Research shows 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, and distribution form is the flow field of confluxing, so such design method still has bigger incidence loss concerning fan blade.
And for example, existing technology discloses following scheme, is designed with towards the bulge of fin sense of rotation rear side (air outflow side) at the hinder marginal part of fin.Described bulge is to be recessed to form to the importing direction opposite with the air stream outgoing direction (the sense of rotation front side of fin) through 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 strong noise more is big more.Therefore to guarantee that reducing the air-conditioning outer machine fan noise is current a great problem with improving its efficient under air quantity, blast is constant and fan diameter does not increase the situation.
The model utility content
The utility model purpose 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.
An aspect according to the utility model; A kind of axial fan is provided, has comprised wheel hub and fin, fin has suction surface and pressure side; Fin comprises front edge and hinder marginal part; Hinder marginal part has the 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 along the direction from hinder marginal part root to hinder marginal part periphery gradually.
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 the pressure side lopsidedness.
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 side of wheel hub comprises first side, second side and the 3rd side, and 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 of which 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 width of junction surface is reducing on first wheel root to the second wheel hub root direction gradually.
An aspect according to the utility model also provides a kind of air conditioner, comprises aforesaid axial fan.
Adopt the axial fan of the utility model and have its air conditioner, the hinder marginal part of axial fan is provided with bending part, and bending part extends on hinder marginal part and along hinder marginal part.This bending part is set has increased effective camber at fin trailing edge place; Increase the momentum of fin trailing edge place air-flow, thereby make air-flow overcome the adverse pressure gradient at pressure side trailing edge place easily, make the separated region of pressure side reduce; Profile lift increases; Under the constant situation about not increasing with fan diameter of blast, can effectively improve the air quantity of axial fan, and can reduce noise.Axial flow fan structure 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 He the environmental protectionization of air conditioner.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of existing axial fan;
Fig. 2 is the Facad structure schematic representation according to the axial fan of the utility model;
Fig. 3 is the stravismus structural representation of Fig. 2;
Fig. 4 is the tab construction schematic representation according to axial fan of the present invention;
Fig. 5 is according to the cross section structure of the fin of the axial fan of the utility model and the enlarged view of hinder marginal part thereof;
Fig. 6 is the wheel hub structure schematic representation according to the axial fan of the utility model;
Fig. 7 is the lines formation schematic representation according to the wheel hub of the axial fan of the utility model;
Fig. 8 is according to the axial fan of the utility model and existing axial fan air quantity-rotation speed relation schematic representation; And
Fig. 9 concerns schematic representation according to the axial fan of the utility model and existing axial fan noise-air quantity.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the utility model.
As shown in Figures 2 and 3; According to the axial fan of the utility model, comprise wheel hub 10 and fin 20, 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 the 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.
The axial fan of the utility model; On the hinder marginal part 24 of each fin 20, bending part 25 is set; 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 constant situation about not increasing with fan diameter of blast, can effectively improve the air quantity of axial fan, and can reduce noise.
In the embodiment of the utility model; Axial fan is a three wings formula axial fan; Comprise wheel hub 10, reach three fins 20 that radially distribute at its outer circumferential side, and three fins are in 120 ° ± 5 ° scope equidistantly or the unequal-interval distribution with same shape as running shaft.The height of bending part 25 reduces along the direction from hinder marginal part root 24A to hinder marginal part periphery 24B gradually.
Preferably, referring to Fig. 4, 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 lopsidedness.
Bending part 25 tilts towards pressure side b, and it is that fin 20 trailing edges are along opening up a bending sheet zone suitable height and angled with the string of a musical instrument of aerofoil profile 20 that installs additional to bearing of trend.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 5, the peak of bending part 25 is θ with the angle of place aerofoil chord length, 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; Increase 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, and reaching increases air quantity and the requirement that reduces noise.
According to the embodiment of the optimum of the utility model, hinder marginal part 24 has wing sweepforward 22, and 25B seamlessly transits with hinder marginal part 24 and engages bending part 25 at the flangikng place of wing sweepforward 22.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.
Like Fig. 8 and shown in Figure 9, compare with existing axial fan, according to the bending part 25 that above-mentioned condition forms, having reached effectively increases air quantity and the requirement that reduces noise.
In the axial fan of the utility model; As shown in Figure 6, the side c of the wheel hub 10 of the utility model comprises the first side c1, the second side c2 and the 3rd side c3, and the axis of crossing wheel hub 10 is 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 second side c2 is at the first camber line H1 (referring to Fig. 7) that gradually opens along the axle center that is projected as relative wheel hub 10 on the axial direction of wheel hub 10, and 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 under the prerequisite that does not increase noise, improve the air quantity of axial fan effectively.And reduced the Manufacturing material cost 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. 7 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 a bit arbitrarily in three summits of equilateral triangle to maximum distance between the lower plane circle, L2=(D2+D4)/2;
5, be the center of circle with certain summit of equilateral triangle, diameter D3=2*L2 draws circular arc, and wherein this circular arc reaches with the perpendicular bisector of crossing this summit and goes up flat circle, the round zone of forming of lower plane is cut-away area c '.
The wheel hub 10 of the utility model forms according to the thinking of " wheel hub of circular hub → cone hub → further cutting ", has increased air output after it improves.
As shown in Figure 6, 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 6, 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 6, 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 a broken line for straight line according to the position of intersecting of the 3rd side c3 and the first side c1.
The utility model also provides a kind of air conditioner, comprises aforesaid axial fan.
The axial flow fan structure of the utility model 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 He the environmental protectionization of air conditioner.
The axial fan of the utility model also can be used for other heat-exchange systems.
From above description, can find out that the foregoing description of the utility model has been realized following technique effect:
The axial fan of the utility model and have its air conditioner guaranteeing and can increasing under the prerequisite of air quantity, effectively lowers fan noise, has good application prospects.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (9)
1. axial fan; Comprise wheel hub (10) and fin (20); Said fin (20) has suction surface (a) and pressure side (b); Said fin (20) comprises front edge (22) and hinder marginal part (24), and said hinder marginal part (24) has in abutting connection with the hinder marginal part root (24A) and the hinder marginal part periphery (24B) of said wheel hub (10), it is characterized in that; Said hinder marginal part (24) is provided with bending part (25), and said bending part (25) is gone up and the said hinder marginal part in edge (24) extension at said hinder marginal part (24).
2. axial fan according to claim 1 is characterized in that, said bending part (25) extends to said hinder marginal part periphery (24B) from said hinder marginal part root (24A).
3. axial fan according to claim 1 is characterized in that, the height of said bending part (25) reduces along the direction from said hinder marginal part root (24A) to said hinder marginal part periphery (24B) gradually.
4. axial fan according to claim 3 is characterized in that, the height of the peak of said bending part (25) is h, and the chord length of the aerofoil at the peak place of said bending part (25) is s, wherein, and 0.02≤h/s≤0.04.
5. axial fan according to claim 1 is characterized in that, said bending part (25) is towards said pressure side (b) side bending.
6. axial fan according to claim 1 is characterized in that, said hinder marginal part (24) has wing sweepforward (22), and said bending part (25) seamlessly transits with said hinder marginal part (24) at the flangikng place of said wing sweepforward (22) (25B) and engages.
7. axial fan according to claim 6 is characterized in that, the aerofoil diameter at said flangikng place (25B) is d2, and the aerofoil diameter at the least significant end place of said hinder marginal part periphery (24B) is d1, wherein, and 0.8≤d2/d1≤1.
8. axial fan according to claim 1 is characterized in that, the side (c) of said wheel hub (10) comprises first side (c1), second side (c2) and the 3rd side (c3), wherein,
Said 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 of which end is connected with first side (c1);
Said first side (c1) was the vertical plane of the axis of said wheel hub (10), and the other end of said first side (c1) is connected with second side (c2);
Said second side (c2) is at first camber line of gradually opening along the axle center that is projected as said relatively wheel hub (10) on the axial direction of said wheel hub (10) (H1); Said first camber line (H1) is gone up the distance of the axis that a bit arrives said wheel hub (10) arbitrarily more than or equal to r and smaller or equal to R, and said second side (c2) is connected with the other end of said the 3rd side (c3).
9. an air conditioner comprises axial fan, it is characterized in that, said axial fan is each described axial fan in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120563607 CN202579316U (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120563607 CN202579316U (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579316U true CN202579316U (en) | 2012-12-05 |
Family
ID=47248732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120563607 Expired - Lifetime CN202579316U (en) | 2011-12-28 | 2011-12-28 | Axial fan and air conditioner with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185037A (en) * | 2011-12-28 | 2013-07-03 | 珠海格力电器股份有限公司 | Axial fan and air conditioner with same |
-
2011
- 2011-12-28 CN CN 201120563607 patent/CN202579316U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185037A (en) * | 2011-12-28 | 2013-07-03 | 珠海格力电器股份有限公司 | Axial fan and air conditioner with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201517513U (en) | Axial-flow fan and outdoor unit of air conditioner with same | |
| CN202091255U (en) | Axial fan | |
| CN201547015U (en) | Low-noise centrifugal wind wheel | |
| WO2020042551A1 (en) | Axial flow fan wheel and axial flow fan using same | |
| CN103573703B (en) | Axial flow fan blade | |
| CN202418036U (en) | Axial fan and air conditioner with same | |
| CN206816552U (en) | Axial-flow windwheel and air conditioner | |
| CN206530538U (en) | Blade for impeller, impeller and fan | |
| CN202579316U (en) | Axial fan and air conditioner with same | |
| CN103185036B (en) | Axial fan and air conditioner with same | |
| CN202707612U (en) | Axial flow fan blade | |
| CN2451783Y (en) | Axial flow fan blades | |
| CN104895838A (en) | Axial flow fan blade and axial flow fan | |
| CN103185037B (en) | Axial fan and air conditioner with same | |
| CN214837351U (en) | Efficient cross-flow wind wheel | |
| CN107023513A (en) | Axial-flow windwheel and air conditioner | |
| CN106762829A (en) | blade for impeller, impeller and fan | |
| CN209704915U (en) | Centrifugal fan blade, courtyard machine and air conditioning system with same | |
| CN203730399U (en) | Axial flow fan blade and axial flow fan | |
| CN104728162B (en) | Cross-flow fan blade | |
| CN209586721U (en) | Axial flow blower and air processor with it | |
| CN203175969U (en) | Multiple-blade centrifugal blower | |
| CN202659571U (en) | Axial flow fan blade and air conditioner comprising same | |
| CN116066402A (en) | Centrifugal fan impeller and air conditioner | |
| CN201412393Y (en) | Blade, fan impeller and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |