CN109058165B - Axial flow fan blade and fan and air conditioner comprising same - Google Patents
Axial flow fan blade and fan and air conditioner comprising same Download PDFInfo
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- CN109058165B CN109058165B CN201810904803.8A CN201810904803A CN109058165B CN 109058165 B CN109058165 B CN 109058165B CN 201810904803 A CN201810904803 A CN 201810904803A CN 109058165 B CN109058165 B CN 109058165B
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- flow fan
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010009 beating Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000004887 air purification Methods 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an axial flow fan blade, a fan comprising the axial flow fan blade and an air conditioner comprising the axial flow fan blade, and relates to the technical field of air purification. The inner edge is used for being connected with the hub, and the length of the outer edge is longer than that of the inner edge; in a direction from the trailing edge to the leading edge, an end point of the outer edge is located before an end point of the inner edge on the same side as the outer edge end point. When the air flows from the inner edge to the outer edge along the radial direction, along with the increase of the radius of the axial flow fan blade, part of the air flow flowing along the radial direction is blocked by the blades, so that the radial air flow conversion route continues to rotate along the axial direction, the disturbance of the air flow flowing along the radial direction to the air flow flowing along the axial direction is prevented, the high efficiency of the axial flow fan blade is maintained, the air quantity is large, and the noise caused by the disturbance of the air flow is avoided.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to an axial flow fan blade, a fan comprising the axial flow fan blade and an air conditioner comprising the axial flow fan blade.
Background
The axial flow fan blade is widely used in air conditioning products due to large air quantity and low noise, when the existing axial flow fan blade works, the blades rotate, so that air flow enters a flow channel formed in the rotation process of the blades, and the air flow flows along the axial direction, but at the same time, the air flow in the flow channel is under the action of a centrifugal force field, and part of the air flow flows along the radial direction. The air flow flowing along the radial direction disturbs the air flow flowing along the axial direction, so that the problems of reducing the efficiency of the axial flow fan blade, reducing the air quantity and increasing the power are caused; and the airflow disturbance forms strong turbulence noise on the blade surface. The application provides the axial flow fan blade for solving the technical problems of low efficiency, low air quantity and high noise of the existing axial flow fan blade.
Disclosure of Invention
The invention provides an axial flow fan blade, a fan and an air conditioner comprising the axial flow fan blade, and aims to solve the problems of low efficiency, low air quantity and high noise of the existing axial flow fan blade.
In a first aspect, the invention provides an axial flow fan blade, comprising a hub and a plurality of blades arranged on the periphery of the hub, wherein each blade comprises an inner edge, a front edge, an outer edge and a rear edge which are sequentially connected, and the axial flow fan blade is characterized in that the inner edge is used for being connected with the hub, and the length of the outer edge is longer than that of the inner edge; in a direction from the trailing edge to the leading edge, an end point of the outer edge is located before an end point of the inner edge on the same side as the outer edge end point.
Further, in a preferred embodiment of the present invention, the intersection point of the outer edge and the front edge is a first intersection point, the intersection point of the outer edge and the rear edge is a second intersection point, the intersection point of the inner edge and the front edge is a third intersection point, and the intersection point of the inner edge and the rear edge is a fourth intersection point; the first intersection point is located before the third intersection point and the second intersection point is located before the fourth intersection point in the direction from the trailing edge to the leading edge.
Further, in a preferred embodiment of the present invention, the first intersection point, the fourth intersection point and the center of the circle where the hub is located form a first central angle, the first intersection point, the second intersection point and the center of the circle where the hub is located form a second central angle, the second intersection point, the fourth intersection point and the center of the circle where the hub is located form a third central angle, and the first intersection point, the third intersection point and the center of the circle where the hub is located form a fourth central angle; the first central angle is larger than the second central angle and larger than the third central angle or the fourth central angle.
Further, in a preferred embodiment of the present invention, the first central angle is: 75-135 deg..
Further, in a preferred embodiment of the present invention, the third central angle and the fourth central angle are both: 25 deg. -55 deg..
Further, in a preferred embodiment of the present invention, the ratio of the second central angle to the third central angle is: 1.5-2.5.
Further, in a preferred embodiment of the present invention, a point at which an extension line of a line connecting the center of a circle where the hub is located and the third intersection point intersects the outer edge is a fifth intersection point, and a line connecting the third intersection point and the fifth intersection point is a first line; the maximum section of the blade perpendicular to the hub axis is the orthographic plane on which: the plane area surrounded by the front edge, the outer edge and the first connecting line is S1, and the plane area surrounded by the rear edge, the outer edge and the first connecting line is S2, wherein S1/S2 is more than 0.5.
Further, in a preferred embodiment of the present invention, a plurality of curved surfaces are sequentially and equidistantly cut from the inner edge to the outer edge in the radial direction of the blade, each of the curved surfaces forms a chord line between the leading edge and the trailing edge, the chord line between the inner edge and the outer edge sequentially includes r0, r1, r2, r3, r4, r5 … … r10, the point where r5 intersects the leading edge is a sixth intersection point, and the point where r5 intersects the trailing edge is a seventh intersection point; the connecting line of the first intersection point and the third intersection point is a second connecting line, the connecting line of the second intersection point and the fourth intersection point is a third connecting line, the vertical distance from the sixth intersection point to the second connecting line is a first chord height, and the vertical distance from the seventh intersection point to the third connecting line is a second chord height; the second chord height= (0.01-0.05) ×r, and the first chord height= (5-10) ×the second chord height, wherein R is the radius of the axial flow fan blade.
Further, in a preferred embodiment of the present invention, the angles between each of the chord lines r0 to r10 and a plane perpendicular to the hub axis are sequentially α0, α1, α … … α10, the angles increasing first decreasing and the α5 value being the greatest; wherein α10 < α0 < α5.
Further, in a preferred embodiment of the present invention, 35.ltoreq.α0.ltoreq.70.15.ltoreq.α10.ltoreq.35.45.ltoreq.α5.ltoreq.80.
Further, in a preferred embodiment of the present invention, the distance from each of the chord lines r0 to r10 to the maximum section on the blade perpendicular to the hub axis is L0, L1, L2 … … L10 in order, and L0 < L1 < L2 … < L10.
Further, in a preferred embodiment of the present invention, any one of the distances satisfies: l is more than 0.15 and less than 1.5R, wherein R is the radius of the axial flow fan blade.
Further, in a preferred embodiment of the present invention, the method further comprises: the water spraying structure is connected with the outer edge.
In a second aspect, the invention provides an axial flow fan, which comprises the axial flow fan blade described in any one of the above.
In a third aspect, the present invention provides an air conditioner, including any one of the axial flow fan blades described above.
The application provides an axial flow fan blade, a fan and an air conditioner comprising the axial flow fan blade, and an air flow enters a flow channel to flow along the axial direction; when the air flows from the inner edge to the outer edge along the radial direction, along with the increase of the radius of the axial flow fan blade, part of the air flow flowing along the radial direction is blocked by the blades, so that the radial air flow conversion route continues to rotate along the axial direction, the disturbance of the air flow flowing along the radial direction to the air flow flowing along the axial direction is prevented, the high efficiency of the axial flow fan blade is maintained, the air quantity is large, and the noise caused by the disturbance of the air flow is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of an axial flow fan blade according to an embodiment of the present invention;
FIG. 2 is a front view of a blade provided in an embodiment of the present invention;
FIG. 3 is a radial schematic view of a blade according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an axial flow fan blade according to an embodiment of the present invention;
FIG. 5 is a schematic side elevational view of FIG. 4;
Reference numerals:
1-wheel hub
2-Blade
21-Inner edge 22-leading edge 23-outer edge 24-trailing edge 25-curved surface
A-first intersection B-second intersection C-third intersection D-fourth intersection
G-fifth intersection point E-sixth intersection point F-seventh intersection point
CG-first connection AC-second connection BD-third connection
Θ1-first central angle θ2-second central angle
Θ3-third central angle θ4-fourth central angle
H 1-first chord height h 2-second chord height
3-Water beating structure
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Example 1
The embodiment 1 of the present application provides an axial flow fan blade, as shown in fig. 1 and 4, including a hub 1 and a plurality of blades 2 disposed at the periphery of the hub 1, where each blade 2 includes an inner edge 21, a front edge 22, an outer edge 23, and a rear edge 24 that are sequentially connected, and the axial flow fan blade is characterized in that the inner edge 21 is used for being connected with the hub 1, and the length of the outer edge 23 is greater than that of the inner edge 21; in the direction from the trailing edge 24 to the leading edge 22, the end point of the outer edge 23 is located before the end point of the inner edge 21 on the same side as the end point of the outer edge 23. The air flow enters the flow passage to flow along the axial direction, because the length of the outer edge 23 is longer than that of the inner edge 21 in the application, and the end point of the outer edge 23 is positioned before the end point of the inner edge 21 on the same side as the end point of the outer edge 23 in the direction from the rear edge 24 to the front edge 22; when the air flows from the inner edge 21 to the outer edge 23 in the radial direction, along with the increase of the radius of the axial flow fan blade, part of the air flow flowing in the radial direction can be blocked by the blades 2, so that the radial air flow conversion route continues to rotate in the axial direction, the air flow flowing in the radial direction is prevented from being disturbed in the axial direction, the high efficiency of the axial flow fan blade is maintained, the air quantity is large, and the noise caused by the air flow disturbance is avoided.
As shown in fig. 1, an edge portion of the blade 2 for connecting with the hub 1 is an inner edge 21, and an edge portion of the blade 2 radially outward is an outer edge 23; one end of the outer edge 23 is connected to one end of the inner edge 21 through the front edge 22, and the other end of the outer edge 23 is connected to the other end of the inner edge 21 through the rear edge 24.
In order to reduce the radial gas flow disturbance of the inlet front edge 22 of the blade 2 and reduce the inlet loss of the axial flow fan blade, in the axial flow fan blade provided in the embodiment 1 of the present invention, the intersection point of the outer edge 23 and the front edge 22 is a first intersection point a, the intersection point of the outer edge 23 and the rear edge 24 is a second intersection point B, the intersection point of the inner edge 21 and the front edge 22 is a third intersection point C, and the intersection point of the inner edge 21 and the rear edge 24 is a fourth intersection point D; the first intersection point a is located before the third intersection point C and the second intersection point B is located before the fourth intersection point D in the direction from the trailing edge 24 to the leading edge 22, i.e. in the direction of rotation indicated by the arrow shown in fig. 2 or 4.
In this embodiment, a first central angle θ1 is formed by the first intersection point a, the fourth intersection point D and the center of the circle where the hub 1 is located, a second central angle θ2 is formed by the first intersection point a, the second intersection point B and the center of the circle where the hub 1 is located, a third central angle θ3 is formed by the second intersection point B, the fourth intersection point D and the center of the circle where the hub 1 is located, and a fourth central angle θ4 is formed by the first intersection point a, the third intersection point C and the center of the circle where the hub 1 is located; the first central angle theta 1 is larger than the second central angle theta 2 and larger than the third central angle theta 3 or the fourth central angle theta 4.
In this embodiment, the first central angle θ1 is: 75-135 deg.. The third central angle theta 3 and the fourth central angle theta 4 are: 25 deg. -55 deg.. The ratio of the second central angle theta 2 to the third central angle theta 3 is as follows: 1.5-2.5.
By the arrangement, the blades 2 are advanced by theta 4 along the rotating direction shown by the arrow through the first intersection point A and the third intersection point C, so that under the radius of different axial flow blades from the inner edge 21 to the outer edge 23, the time of the air flow entering the flow channel of the blades 2 is different, the time of the air flow entering the flow channel of the blades 2 is earlier and earlier along with the increase of the radius from the inner edge 21 to the outer edge 23, the blades 2 close to the outer edge 23 can effectively shield the air flow flowing through so as to facilitate the axial flow of the air flow, thereby effectively reducing the air flow disturbance caused by radial flow when the air flow enters the flow channel, reducing the air inlet loss of the axial flow blades and increasing the air quantity. The blade 2 is advanced by theta 3 along the rotation direction through the second intersection point B than the fourth intersection point D, so that under the radius of different axial flow blades from the inner edge 21 to the outer edge 23, the time of the airflow flowing out of the flow channel of the blade 2 is different, and the time of the airflow flowing out of the flow channel of the blade 2 is earlier and earlier along with the increase of the radius from the inner edge 21 to the outer edge 23, thereby reducing the airflow disturbance caused by radial flow when the airflow flows out of the flow channel, reducing the turbulence of the tail edge of the axial flow blade and reducing the aerodynamic noise of the blade.
In the axial flow fan blade provided in the embodiment 1 of the present invention, a point where an extension line of a line connecting a circle center of a circle where the hub 1 is located and the third intersection point C intersects with the outer edge 23 is a fifth intersection point G, and a line connecting the third intersection point C and the fifth intersection point G is a first line CG; the maximum section of the blade 2 perpendicular to the hub 1 axis (or Z-axis) is the orthographic plane, see plane ABCD in fig. 2, on which: the plane area enclosed by the front edge 22, the outer edge 23 and the first connecting line CG is S1, i.e. an arc S AECG in fig. 2, and the plane area enclosed by the rear edge 24, the outer edge 23 and the first connecting line CG is S2, i.e. a plane S GCDB in fig. 2 where an arc BD is located, wherein S1/S2 is greater than 0.5. The arrangement of the two areas is convenient for further reducing the air inlet loss of the axial flow fan blade on the premise of the arrangement of the angles.
In order to reasonably twist the blade 2 along the radial direction, as shown in fig. 2, in the axial flow fan blade provided in embodiment 1 of the present invention, a plurality of curved surfaces 25 are sequentially and equidistantly cut from the inner edge 21 to the outer edge 23 along the radial direction of the blade 2, a cylindrical surface passing through the axis of the hub 1 (or passing through the Z axis in fig. 3) with different radii may be cut off from the blade 2, each curved surface 25 forms a chord line between the front edge 22 and the rear edge 24, and the chord line between the inner edge 21 and the outer edge 23 sequentially includes r0, r1, r2, r3, r4, r5 … … r10, and the point where r0 intersects with the front edge 22 is the third intersection point C, and the point where r0 intersects with the rear edge 24 is the fourth intersection point D; the point at which r10 intersects the leading edge 22 is the first intersection point a, and the point at which r10 intersects the trailing edge 24 is the second intersection point B; the point at which r5 intersects the leading edge 22 is a sixth intersection point E, and the point at which r5 intersects the trailing edge 24 is a seventh intersection point F; the connecting line of the first intersection point A and the third intersection point C is a second connecting line AC, the connecting line of the second intersection point B and the fourth intersection point D is a third connecting line BD, the vertical distance from the sixth intersection point E to the second connecting line AC is a first chord height h1, and the vertical distance from the seventh intersection point F to the third connecting line BD is a second chord height h2; the second chord height h2= (0.01-0.05) R, and the first chord height h1= (5-10) h2, wherein R is the radius of the axial flow fan blade.
In this embodiment, the included angles between each of the chord lines r0 to r10 and the plane perpendicular to the axis of the hub 1 are sequentially α0, α1, α … … α10, where the included angles increase first and decrease and the α5 value is the largest, α5=αmax; wherein α10 < α0< α5, α10=αmi.
The axial flow fan blade provided by the embodiment 1 of the invention is 35 degrees or more and is not more than 70 degrees or more, 15 degrees or more and is not more than 10 degrees or less and is not more than 35 degrees or more, 45 degrees or more and is not more than 5 degrees or less than 80 degrees or less.
In this embodiment, the distances between each of the chord lines r0 to r10 and the plane of the maximum section of the blade 2 perpendicular to the axis (or Z axis) of the hub 1 are sequentially L0, L1, L2 … … L10, and the distances gradually increase, i.e., L0 (min) < L1 < L2 … < L10 (max). Any of the distances satisfies: l is more than 0.15 and less than 1.5R, wherein R is the radius of the axial flow fan blade.
The arrangement of the numerical values enables the blades 2 to be reasonably distorted along the radial direction, reduces air flow disturbance after the air flow enters the flow channel of the blades 2 and before the air flow flows out of the flow channel of the blades 2 and before the air flow has different radiuses, and improves the efficiency of the blades.
As shown in fig. 4, in the axial flow fan blade provided in this embodiment 1, the axial flow fan blade further includes: and the water beating structure 3, wherein the water beating structure 3 is connected with the outer edge 23. The water pumping structure 3 is convenient for pumping and evaporating condensed water generated during air conditioner refrigeration.
Example 2
Embodiment 2 of the present invention provides an axial flow fan, including any one of the axial flow fan blades described above.
Example 3
Embodiment 3 of the present invention provides an air conditioner, which includes any one of the axial flow fan blades described above.
The axial flow fan blade provided by the embodiment 1 of the application is applied to air conditioning products, can improve the air quantity by more than 15% under the same rotating speed, the same load and the same motor rotating speed, the power is increased by not more than 6%, the whole machine efficiency is improved, and the noise is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An axial flow fan blade comprises a hub (1) and a plurality of blades (2) arranged on the periphery of the hub (1), wherein each blade (2) comprises an inner edge (21), a front edge (22), an outer edge (23) and a rear edge (24) which are sequentially connected, and the axial flow fan blade is characterized in that the inner edge (21) is used for being connected with the hub (1), and the length of the outer edge (23) is larger than that of the inner edge (21); -an end point of the outer edge (23) is located before an end point of the inner edge (21) on the same side as the end point of the outer edge (23) in a direction from the trailing edge (24) to the leading edge (22);
-intercepting a plurality of curved surfaces (25) in succession equidistant from said inner edge (21) to said outer edge (23) in the radial direction of said blade (2), each of said curved surfaces (25) forming a chord line between said leading edge (22) and said trailing edge (24), said chord line between said inner edge (21) to said outer edge (23) comprising in succession r0, r1, r2, r3, r4, r5 … … r10, each of said chord lines from r0 to r10 having an angle with a plane perpendicular to said hub axis of in succession α0, α1, α2 … … α10, said angle increasing and decreasing first and having a maximum value of α5; wherein, alpha 10 is less than alpha 0 and less than alpha 5;
The distance from each of the chord lines from r0 to r10 to the maximum section on the blade perpendicular to the hub axis is in turn L0, L1, L2 … … L10, and L0 < L1 < L2 … < L10.
2. An axial flow fan blade according to claim 1, wherein the intersection point of the outer edge (23) and the front edge (22) is a first intersection point (a), the intersection point of the outer edge (23) and the rear edge (24) is a second intersection point (B), the intersection point of the inner edge (21) and the front edge (22) is a third intersection point (C), and the intersection point of the inner edge (21) and the rear edge (24) is a fourth intersection point (D); in the direction from the trailing edge (24) to the leading edge (22), the first intersection point (a) is located before the third intersection point (C), and the second intersection point (B) is located before the fourth intersection point (D).
3. The axial flow fan blade according to claim 2, wherein the first intersection point, the fourth intersection point and the center of a circle where the hub (1) is located form a first central angle (θ1), the first intersection point, the second intersection point and the center of a circle where the hub (1) is located form a second central angle (θ2), the second intersection point (B), the fourth intersection point (D) and the center of a circle where the hub (1) is located form a third central angle (θ3), and the first intersection point (a), the third intersection point (C) and the center of a circle where the hub (1) is located form a fourth central angle (θ4); the first central angle (theta 1) > the second central angle (theta 2) > the third central angle (theta 3) or the fourth central angle (theta 4).
4. An axial flow fan blade according to claim 3, characterized in that the first central angle (θ1) is: 75-135 deg..
5. An axial flow fan blade according to claim 3, characterized in that the third (θ3) and the fourth (θ4) central angles are both: 25 deg. -55 deg..
6. An axial flow fan blade according to claim 3, characterized in that the ratio of the second central angle (θ2) to the third central angle (θ3) is: 1.5-2.5.
7. An axial flow fan blade according to claim 3, wherein a point at which an extension line of a line connecting a circle center of the hub (1) and the third intersection point (C) intersects with the outer edge (23) is a fifth intersection point (G), and a line connecting the third intersection point (C) and the fifth intersection point (G) is a first line (CG); the maximum section of the blade perpendicular to the hub axis is the orthographic plane on which: the plane area surrounded by the front edge (22), the outer edge (23) and the first connecting line is S1, and the plane area surrounded by the rear edge (24), the outer edge (23) and the first connecting line is S2, wherein S1/S2 is more than 0.5.
8. An axial flow fan blade according to claim 2, characterized in that the point where r5 intersects the leading edge (22) is a sixth intersection point (E), and the point where r5 intersects the trailing edge (24) is a seventh intersection point (F); the connecting line of the first intersection point (A) and the third intersection point (C) is a second connecting line (AC), the connecting line of the second intersection point (B) and the fourth intersection point (D) is a third connecting line (BD), the vertical distance from the sixth intersection point (E) to the second connecting line (AC) is a first chord height (h 1), and the vertical distance from the seventh intersection point (F) to the third connecting line (BD) is a second chord height (h 2); the second chord height (h 2) = (0.01-0.05) ×r, and the first chord height (h 1) = (5-10) = (second chord height (h 2), wherein R is the radius of the axial flow fan blade.
9. An axial flow fan blade according to claim 1, wherein 35 ° is equal to or less than 70 ° and 15 ° is equal to or less than 35 ° and 45 ° is equal to or less than 5 ° is equal to or less than 80 °.
10. The axial flow fan blade according to claim 1, wherein any one of the distances satisfies: l is more than 0.15 and less than 1.5R, wherein R is the radius of the axial flow fan blade.
11. An axial flow fan blade as claimed in any one of claims 1 to 10, further comprising: and the water beating structure (3), and the water beating structure (3) is connected with the outer edge (23).
12. An axial flow fan, characterized by comprising the axial flow fan blade according to any one of claims 1-11.
13. An air conditioner comprising the axial flow fan blade according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904803.8A CN109058165B (en) | 2018-08-09 | 2018-08-09 | Axial flow fan blade and fan and air conditioner comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904803.8A CN109058165B (en) | 2018-08-09 | 2018-08-09 | Axial flow fan blade and fan and air conditioner comprising same |
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| Publication Number | Publication Date |
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| CN109058165A CN109058165A (en) | 2018-12-21 |
| CN109058165B true CN109058165B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810904803.8A Active CN109058165B (en) | 2018-08-09 | 2018-08-09 | Axial flow fan blade and fan and air conditioner comprising same |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294265B (en) * | 2021-12-30 | 2023-11-03 | 广东美的白色家电技术创新中心有限公司 | Wind wheel structure and fan |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895838A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Axial flow blade and axial flow fan |
| CN104948494A (en) * | 2015-07-07 | 2015-09-30 | 珠海格力电器股份有限公司 | Axial flow fan and window type air conditioner |
| CN208778341U (en) * | 2018-08-09 | 2019-04-23 | 珠海格力电器股份有限公司 | A kind of axial-flow leaf and blower, air-conditioning comprising it |
-
2018
- 2018-08-09 CN CN201810904803.8A patent/CN109058165B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895838A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Axial flow blade and axial flow fan |
| CN104948494A (en) * | 2015-07-07 | 2015-09-30 | 珠海格力电器股份有限公司 | Axial flow fan and window type air conditioner |
| CN208778341U (en) * | 2018-08-09 | 2019-04-23 | 珠海格力电器股份有限公司 | A kind of axial-flow leaf and blower, air-conditioning comprising it |
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| Publication number | Publication date |
|---|---|
| CN109058165A (en) | 2018-12-21 |
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