CN104061187A - Axial-flow fan blade, axial-flow fan and air conditioner - Google Patents
Axial-flow fan blade, axial-flow fan and air conditioner Download PDFInfo
- Publication number
- CN104061187A CN104061187A CN201410305902.6A CN201410305902A CN104061187A CN 104061187 A CN104061187 A CN 104061187A CN 201410305902 A CN201410305902 A CN 201410305902A CN 104061187 A CN104061187 A CN 104061187A
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- CN
- China
- Prior art keywords
- axial
- blade
- flow leaf
- groove structure
- flow
- 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.)
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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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
Abstract
The invention relates to an axial-flow fan blade, an axial-flow fan and an air conditioner. The axial-flow fan blade comprises a blade front edge and a blade tail edge, and the area of the blade tail edge is provided with at least two groove structures which are concaved towards the front edge direction of the blade along the radial direction. The vortex intensity of a suction surface of the axial-flow fan blade can be effectively weakened through a plurality of groove structures, the impact of the tail vortex of a previous axial-flow fan blade on a following axial-flow fan blade can be reduced, the air volume can be effectively increased, the noise of the axial-flow fan can be lowered, and the weight of the axial-flow fan blade can be reduced.
Description
Technical field
The present invention relates to air conditioner field, relate in particular to a kind of axial-flow leaf, adopt the axial-flow blower of this axial-flow leaf, and the air conditioner with this axial-flow blower.
Background technique
In the outdoor unit of air conditioner, mostly adopt axial-flow leaf.Have at present a kind of axial-flow blower, be formed with a plurality of axial-flow leafs with the periphery of its wheel hub, boundary layer separation, to blade inlet edge airintake direction depression, can be reduced on the whole in the trailing edge region of blade, reduces eddy current noise.Also has a kind of axial-flow leaf, trailing edge in the direction towards with blade rotary opposite direction is formed with to the recess of sense of rotation depression, and be formed with in the trailing edge part crossing with blade external side brim the teat bloating to the direction contrary with sense of rotation, this axial-flow leaf occurs to suppress to the eddy current of the air stream of trailing edge, reduces noise.But above-mentioned two kinds of axial-flow leafs are also needing further raising aspect reduction noise and lifting fan blade air quantity.
Summary of the invention
For the problems referred to above, the object of the invention is to propose a kind of axial-flow leaf, axial-flow blower and air conditioner, it can effectively reduce noise.
For achieving the above object, the invention provides a kind of axial-flow leaf, it comprises blade inlet edge and blade trailing edge, and described blade trailing edge region is disposed radially at least two to the recessed groove structure of described blade inlet edge direction.
In a preferred or optional embodiment, described in each, the degree of depth of groove structure radially increases successively.
In a preferred or optional embodiment, described in each, the bottom land of groove structure radially increases successively or equates to the arc length of described blade inlet edge.
In a preferred or optional embodiment, the initial position of the described groove structure that described blade trailing edge middle distance wheel hub is nearest is positioned at the region of the described wheel hub 0～0.2R of distance, wherein, and the blade height that R is described axial-flow leaf.
In a preferred or optional embodiment, the end position of the described groove structure that described blade trailing edge middle distance blade outward edge is nearest is positioned at the region of the described blade outward edge of distance 0～0.7R, wherein, and the blade height that R is described axial-flow leaf.
In a preferred or optional embodiment, the bottom land of described groove structure is 0.4La～0.75La to the length range of the shortest arc length of described blade inlet edge, and La is the arc length length of blade outer most edge.
In a preferred or optional embodiment, the outer peripheral diameter of described blade of described axial-flow leaf is D1, and the diameter of described wheel hub is D2, described blade height R=(D1-D2)/2.
In a preferred or optional embodiment, groove structure is shaped as wherein one or more the mixing in circular arc, U font, V font, polyline shaped described in each on described blade trailing edge.
In a preferred or optional embodiment, the quantity of the described groove structure arranging on described blade trailing edge is 2～4.
For achieving the above object, the present invention also provides a kind of axial-flow blower, and it comprises the axial-flow leaf in above-mentioned arbitrary embodiment.
For achieving the above object, the present invention also provides a kind of air conditioner, and it comprises the axial-flow blower in above-mentioned arbitrary embodiment.
Based on technique scheme, the present invention at least has following beneficial effect:
The present invention the blade trailing edge region division of axial-flow leaf two or more to the recessed groove structure of blade inlet edge direction, by several groove structures, can effectively weaken the strength of vortex of axial-flow leaf suction surface, the impact of the tail eddy current that reduces last axial-flow leaf to a rear axial-flow leaf, thereby can effectively reduce the noise of axial-flow blower, and can alleviate the weight of axial-flow leaf.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the perspective view of axial-flow leaf provided by the invention;
Fig. 2 is that the master of axial-flow leaf provided by the invention looks schematic diagram;
Fig. 3 is the area schematic of initial position of the groove structure of axial-flow leaf provided by the invention;
Fig. 4 is the area schematic of end position of the groove structure of axial-flow leaf provided by the invention;
Fig. 5 is that existing common blade profile is without the Flow Field Distribution schematic diagram of groove structure;
Fig. 6 is the Flow Field Distribution schematic diagram that existing common blade profile has a groove structure;
Fig. 7 is the Flow Field Distribution schematic diagram that a plurality of groove structures are set on axial-flow leaf provided by the invention;
The schematic diagram that a plurality of groove structures disperse suction surface eddy current is set on Fig. 8 axial-flow leaf provided by the invention;
Fig. 9 is the correlation curve figure that the axial-flow leaf that several groove structures are set provided by the invention and the axial-flow leaf that a sunk structure is set in prior art produce noise under identical air quantity.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in embodiment is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limiting the scope of the invention.
As shown in Figure 1 and Figure 2, axial-flow leaf provided by the invention schematically but in non-limiting example, axial-flow leaf comprises blade inlet edge 1, blade trailing edge 2, blade inward flange and blade outward edge 3.Wherein, blade inward flange refers to that blade outward edge 3 refers to the edge away from wheel hub for being arranged on the edge on wheel hub 4, from blade inward flange to blade outward edge 3 for radially.The region of blade trailing edge 2 is disposed radially at least two to the recessed groove structure 5 of blade inlet edge 1 direction, the degree of depth of each groove structure 5 radially increases successively, the bottom land of each groove structure 5 can equate to the arc length of blade inlet edge 1, or, the bottom land of each groove structure 5 can radially increase successively to the arc length of blade inlet edge 1, and each arc length becomes large successively along the direction from wheel hub 4 to blade outward edge 3.
For example: suppose from blade outward edge 3, to wheel hub 4 directions, n groove structure 5 to be set altogether on blade trailing edge 2, the arc length of the groove structure 5 nearest apart from blade outward edge 3 is L1, the arc length of the groove structure 5 nearest apart from wheel hub 4 is Ln: and L1 >=L2 >=L3 >=L4 >=... Ln.When the bottom land of each groove structure 5 radially becomes large successively to the arc length of blade inlet edge 1, be that each arc length is while becoming large successively along the direction from wheel hub 4 to blade outward edge 3, the bottom land of groove structure 5 is to the shortest arc length of blade inlet edge 1, the bottom land of the groove structure 5 nearest apart from wheel hub 4 can be 0.4La～0.75La (Ln=0.4La～0.75La) to the length range of the arc length Ln of blade inlet edge 1, and La represents the arc length of blade outer most edge.
As shown in Figure 5, for the Flow Field Distribution figure of common blade profile without groove structure, from this schematic diagram, can find out, the suction surface of fan blade and pressure side have certain pressure difference, some gas entrainments into suction surface from pressure side, at suction surface, produce turbulent flow, the turbulence intensity of suction surface is one of principal element affecting noise etc.
As shown in Figure 6, for the Flow Field Distribution figure of a groove structure is set in common blade profile, from this schematic diagram, can find out, a groove structure can disperse eddy current, but the turbulence intensity that this blade profile produces at suction surface is still larger.
As Fig. 7, shown in Fig. 8, the schematic diagram that suction surface eddy current is disperseed for a plurality of groove structures are set on axial-flow leaf provided by the invention, from Fig. 7 and Fig. 8, can find out, suction surface and pressure side have certain pressure difference, some gas entrainments into suction surface from pressure side, produce turbulent flow, because the present invention has several to the recessed groove structure 5 of blade inlet edge 1 direction at the region division of blade trailing edge 2, therefore, when axial-flow leaf rotates, a plurality of groove structures 5 of blade trailing edge 2 can make the air-flow of pressure side part flow into dispersedly suction surface, the eddy current that suction surface produces is disperseed, reduced the turbulence intensity of suction surface, make the tail remitted its fury as the axial-flow leaf of rotor, the boundary layer that has reduced rotor is separated, effectively reduce noise, simultaneously, when a rear axial-flow leaf forwards the same position of last axial-flow leaf to, can make the turbulent flow of last axial-flow leaf afterbody reduce the impact of a rear axial-flow leaf generation, further reduced noise, promoted air quantity, and reduced motor load and energy consumption, promoted the efficiency of axial-flow blower.
Further, due to air quantity radially increasing gradually along axial-flow leaf, therefore, air quantity the closer to blade outward edge 3 is larger, the eddy current producing is more, turbulence intensity is larger, the degree of depth of each groove structure 5 arranging on the blade trailing edge 2 of axial-flow leaf provided by the invention radially increases successively, larger the closer to the degree of depth of the groove structure 5 of blade outward edge 3, the present invention studies discovery, the degree of depth of groove structure 5 is larger, more can effectively reduce from pressure side and entrainment the strength of vortex into suction surface, the turbulent flow producing reduces relatively, reduced the turbulence intensity of suction surface, further reduced noise, promoted air quantity.
As shown in Figure 1, in schematically but in non-limiting example of axial-flow leaf provided by the invention, the position crossing apart from the nearest groove structure of blade outward edge 35 and blade outward edge 3 can be provided with to away from the outstanding protruding structure 6 of blade inlet edge 1 direction, can further make the eddy current of suction surface disperse, reduce the turbulence intensity of suction surface.
As shown in Figure 3, Figure 4, axial-flow leaf provided by the invention schematically but in non-limiting example, the outer diameter of axial-flow leaf is defined as D1, the diameter of wheel hub 4 is defined as D2, the blade height R=of axial-flow leaf (D1-D2)/2; The initial position S of the groove structure 5 that blade trailing edge 2 middle distance wheel hubs 4 are nearest can be positioned at the region apart from wheel hub 0～0.2R, can further reduce noise, the blade height that wherein R is axial-flow leaf.The end position E of the groove structure 5 that blade trailing edge 2 middle distance blade outward edges 3 are nearest can be positioned at the region apart from blade outward edge 0～0.7R, can further reduce noise, the blade height that wherein R is axial-flow leaf.
As shown in Figure 9, for the axial-flow leaf that is provided with several groove structures 5 provided by the invention and the axial-flow leaf that a sunk structure is set in prior art produce the correlation curve schematic diagram of noise under identical air quantity, from this schematic diagram, can find out, under identical air quantity, provided by the invention have the axial-flow leaf of two or more groove structures 5 can significantly reduce noise with respect to the axial-flow leaf that a sunk structure is set in prior art.
Above-mentioned schematically but in non-limiting example, the shape of each groove structure 5 on blade trailing edge 2 can be wherein one or more the mixing in circular arc, U font, V font, polyline shaped.
Above-mentioned schematically but in non-limiting example, the quantity of the groove structure 5 arranging on blade trailing edge 2 can be 2～4.
Axial-flow leaf provided by the invention can be used on axial-flow blower.
As shown in Figure 1 and Figure 2, in schematically but in non-limiting example of axial-flow blower provided by the invention, axial-flow blower comprises wheel hub 4, and be arranged at least three axial-flow leafs on wheel hub 4, axial-flow leaf adopts above-mentioned arbitrary axial-flow leaf schematically but in non-limiting example, therefore, axial-flow blower provided by the invention possesses the beneficial effect of axial-flow leaf provided by the invention accordingly.
Axial-flow blower provided by the invention can be applied on air conditioner.
In schematically but in non-limiting example of air conditioner provided by the invention, air conditioner comprises outdoor unit, in outdoor unit, be provided with above-mentioned arbitrary axial-flow blower schematically but in non-limiting example, therefore, air conditioner provided by the invention possesses the beneficial effect of axial-flow blower provided by the invention accordingly.
In sum, the present invention passes through to improve the blade structure of axial-flow leaf, thereby has increased the air output of air conditioner outdoor machine, has strengthened heat exchange efficiency, has reduced the noise of blower fan system simultaneously, has improved the tonequality of air conditioner outdoor machine.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characteristics is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope that the present invention asks for protection.
Claims (11)
1. an axial-flow leaf, is characterized in that: comprise blade inlet edge and blade trailing edge, described blade trailing edge region is disposed radially at least two to the recessed groove structure of described blade inlet edge direction.
2. axial-flow leaf according to claim 1, is characterized in that: described in each, the degree of depth of groove structure radially increases successively.
3. axial-flow leaf according to claim 1 and 2, is characterized in that: described in each, the bottom land of groove structure radially increases successively or equates to the arc length of described blade inlet edge.
4. axial-flow leaf according to claim 1, is characterized in that: the initial position of the described groove structure that described blade trailing edge middle distance wheel hub is nearest is positioned at the region of the described wheel hub 0～0.2R of distance, wherein, and the blade height that R is described axial-flow leaf.
5. axial-flow leaf according to claim 1, it is characterized in that: the end position of the described groove structure that described blade trailing edge middle distance blade outward edge is nearest is positioned at the region of the described blade outward edge of distance 0～0.7R, wherein, the blade height that R is described axial-flow leaf.
6. axial-flow leaf according to claim 3, is characterized in that: the bottom land of described groove structure is 0.4La～0.75La to the length range of the shortest arc length of described blade inlet edge, and La is the arc length length of blade outer most edge.
7. according to the axial-flow leaf described in claim 4 or 5, it is characterized in that: the outer peripheral diameter of described blade of described axial-flow leaf is D1, and the diameter of described wheel hub is D2, described blade height R=(D1-D2)/2.
8. axial-flow leaf according to claim 1 and 2, is characterized in that: described in each on described blade trailing edge, groove structure is shaped as wherein one or more the mixing in circular arc, U font, V font, polyline shaped.
9. axial-flow leaf according to claim 1 and 2, is characterized in that: the quantity of the described groove structure arranging on described blade trailing edge is 2～4.
10. an axial-flow blower, is characterized in that: comprise the axial-flow leaf as described in claim 1-9 any one.
11. 1 kinds of air conditioners, is characterized in that: comprise axial-flow blower as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305902.6A CN104061187A (en) | 2014-06-30 | 2014-06-30 | Axial-flow fan blade, axial-flow fan and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305902.6A CN104061187A (en) | 2014-06-30 | 2014-06-30 | Axial-flow fan blade, axial-flow fan and air conditioner |
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| CN104061187A true CN104061187A (en) | 2014-09-24 |
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| CN201410305902.6A Pending CN104061187A (en) | 2014-06-30 | 2014-06-30 | Axial-flow fan blade, axial-flow fan and air conditioner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927586A (en) * | 2016-06-03 | 2016-09-07 | 华中科技大学 | Modified open-type axial flow fan blade and modification method thereof |
| CN106640752A (en) * | 2016-12-19 | 2017-05-10 | 宁波方太厨具有限公司 | Impeller of kitchen ventilator |
| JP2018035798A (en) * | 2016-09-02 | 2018-03-08 | 株式会社富士通ゼネラル | Axial fan and outdoor unit |
| JP2018053749A (en) * | 2016-09-27 | 2018-04-05 | 株式会社富士通ゼネラル | Axial flow fan and outdoor machine using the same |
| JP2018173082A (en) * | 2018-06-04 | 2018-11-08 | 三菱電機株式会社 | Propeller fan, air conditioner and ventilation device |
| EP3470686A4 (en) * | 2016-07-01 | 2019-05-22 | Mitsubishi Electric Corporation | Propeller fan |
| WO2019136939A1 (en) * | 2018-01-13 | 2019-07-18 | 广东美的环境电器制造有限公司 | Axial fan blade, axial fan blade assembly, and axial fan duct assembly |
| CN111425454A (en) * | 2020-03-31 | 2020-07-17 | Tcl空调器(中山)有限公司 | Axial flow fan blade and air conditioner outdoor unit |
| WO2022019462A1 (en) * | 2020-07-24 | 2022-01-27 | 삼성전자주식회사 | Air conditioner outdoor unit |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105927586B (en) * | 2016-06-03 | 2018-05-11 | 华中科技大学 | The Start-stop control leaf and its modified method of a kind of remodeling |
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| US11098734B2 (en) | 2016-07-01 | 2021-08-24 | Mitsubishi Electric Corporation | Propeller fan, air-conditioning apparatus and ventilator |
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| WO2019136939A1 (en) * | 2018-01-13 | 2019-07-18 | 广东美的环境电器制造有限公司 | Axial fan blade, axial fan blade assembly, and axial fan duct assembly |
| JP2018173082A (en) * | 2018-06-04 | 2018-11-08 | 三菱電機株式会社 | Propeller fan, air conditioner and ventilation device |
| CN111425454A (en) * | 2020-03-31 | 2020-07-17 | Tcl空调器(中山)有限公司 | Axial flow fan blade and air conditioner outdoor unit |
| CN111425454B (en) * | 2020-03-31 | 2021-11-09 | Tcl空调器(中山)有限公司 | Axial flow fan blade and air conditioner outdoor unit |
| WO2022019462A1 (en) * | 2020-07-24 | 2022-01-27 | 삼성전자주식회사 | Air conditioner outdoor unit |
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Application publication date: 20140924 |