CN206221360U - Axial-flow windwheel and the air-conditioner with axial-flow windwheel - Google Patents

Abstract

The utility model discloses a kind of axial-flow windwheel and the air-conditioner with axial-flow windwheel, the axial-flow windwheel includes：Wheel hub and multiple blades, multiple blades are located on the outer peripheral face of wheel hub, each blade front side edge edge along clockwise direction is formed as leading edge, rear lateral edge is formed as trailing edge, the edge of the outer end of the connection leading edge and trailing edge of each blade is formed as outer rim, each blade is respectively formed as normal pressure face and negative pressure face along the both side surface of the central axis direction of wheel hub, wherein, the projection of blade is divided into the first perspective plane and the second perspective plane by the central shaft of wheel hub to the line between the midpoint of blade outer rim in projection of the axial-flow windwheel in the plane perpendicular to the central shaft of wheel hub, first perspective plane is located at the front side along clockwise direction on the second perspective plane, and first perspective plane area and the area on the second perspective plane between ratio in the range of 0.35 to 0.5.According to axial-flow windwheel of the present utility model, have the advantages that air quantity is big and noise is small.

Description

Axial-flow windwheel and the air-conditioner with axial-flow windwheel

Technical field

The utility model is related to technical field of refrigeration equipment, more particularly, to a kind of axial-flow windwheel and with axial-flow windwheel Air-conditioner.

Background technology

In the case of raw material and human cost more and more higher, each product manufacturer must constantly reduce the cost of product, Performance and quality is really kept not to decline while cost is reduced simultaneously, to ensure the competitiveness of product in market.How to coordinate Balance between Cost And Performance and quality, into a great problem of Air-conditioning Enterprise research and development.At present, air-conditioning producer is usually using body The smaller small box exploitation refrigerating/heating ability of product than larger big ability type, using reducing machine volume to increase fortune The technology reduces costs such as defeated dress cabinet amount, reduction casing reduction monomer model machine raw material usage amount；Small box type is additionally favorable for user Selection and can reserve service clearance that installation is put, increase selection of the user to type species, improve the market competitiveness.

After type casing diminishes, if each parameter remains unchanged, refrigerating/heating ability meeting under some operating modes of type There is decay.In order to ensure to be not in decay on the relatively large casing model capability of small box type, generally by improving blower fan Rotating speed and compressor operation frequency realize that after rotation speed of fan is improved, model machine running noise can increase, the air-conditioner of reduction Sound quality, be unfavorable for the competitiveness of product in market.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model exists In a kind of axial-flow windwheel is proposed, the axial-flow windwheel has the advantages that air quantity is big and noise is small.

The utility model also proposes a kind of air-conditioner with above-mentioned axial-flow windwheel.

According to the axial-flow windwheel of the utility model first aspect, including：Wheel hub；And multiple blades, multiple blades Central shaft around the wheel hub is located on the outer peripheral face of the wheel hub with being arranged in order along clockwise direction, each described blade Along leading edge is formed as, each blade rear lateral edge along clockwise direction is formed as tail to front side edge along clockwise direction Edge, the edge of the outer end of the connection leading edge and trailing edge of each blade is formed as outer rim, and each described blade is along described The both side surface of the central axis direction of wheel hub is respectively formed as normal pressure face and negative pressure face, wherein, the axial-flow windwheel is hanging down The central shaft of the straight wheel hub described in the projection in the plane of the central shaft of the wheel hub is between the midpoint of the blade outer rim Line the projection of the blade is divided into the first perspective plane and the second perspective plane, first perspective plane is located at described second Between the front side along clockwise direction on perspective plane, and the area on the area on first perspective plane and second perspective plane Ratio is in the range of 0.35 to 0.5.

According to axial-flow windwheel of the present utility model, have the advantages that air quantity is big and noise is small.

In certain embodiments, the ratio between the area on the area on first perspective plane and second perspective plane exists In the range of 0.38 to 0.45.

Further, the ratio between the area on the area on first perspective plane and second perspective plane is 0.4.

In certain embodiments, the ratio between the maximum gauge of the diameter of the wheel hub and the blade is arrived 0.23 In the range of 0.29.

Further, model of the ratio between the maximum gauge of the diameter of the wheel hub and the blade 0.24 to 0.28 In enclosing.

Further, the ratio between the maximum gauge of the diameter of the wheel hub and the blade is 0.26.

In certain embodiments, the maximum of the maximum height along its Pivot axle of the axial-flow windwheel and the blade Ratio between diameter is in the range of 0.29 to 0.34.

Further, the maximum gauge of the maximum height along its Pivot axle of the axial-flow windwheel and the blade it Between ratio be 0.315.

In certain embodiments, the quantity of the blade is in the range of 2 to 4.

Further, the blade includes circumferentially four along the wheel hub.

In certain embodiments, the negative pressure face is provided with one or spaced apart multiple grooves.

In certain embodiments, it is formed with the trailing edge towards the leading edge direction and is recessed and along the thickness of the blade Direction through the blade gap slot, the connecting portion arc transition of the gap slot and the trailing edge.

In certain embodiments, the leading edge of the blade on bearing of trend of the court away from the wheel hub along clockwise direction Incline and extend, the blade is downward-sloping along clockwise direction of rotation.

According to the air-conditioner of the utility model second aspect, including according to the axial-flow windwheel of the utility model first aspect.

According to air-conditioner of the present utility model, by setting the axial-flow windwheel of above-mentioned first aspect, so as to improve air-conditioning The overall performance of device.

Additional aspect of the present utility model and advantage will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Fig. 1 is the schematic diagram of the axial-flow windwheel top view according to the utility model embodiment；

Fig. 2 is the schematic diagram of the axial-flow windwheel front view according to the utility model embodiment；

Fig. 3 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.5 on area/the second perspective plane on the first perspective plane；

Fig. 4 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.48 on area/the second perspective plane on the first perspective plane；

Fig. 5 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.42 on area/the second perspective plane on the first perspective plane；

Fig. 6 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.40 on area/the second perspective plane on the first perspective plane；

Fig. 7 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.38 on area/the second perspective plane on the first perspective plane；

Fig. 8 is the axial-flow windwheel according to the utility model embodiment in the throwing in the plane perpendicular to the central shaft of wheel hub The schematic diagram of shadow, wherein, area=0.35 on area/the second perspective plane on the first perspective plane；

Fig. 9 is the schematic diagram of the axial-flow windwheel upward view according to the utility model embodiment；

Figure 10 is the schematic diagram of the axial-flow windwheel front view shown in Fig. 9；

Figure 11 is the schematic diagram of the axial-flow windwheel upward view according to the utility model other embodiments；

Figure 12 is the schematic diagram of another angle of the axial-flow windwheel shown in Figure 11；

Figure 13 is the schematic diagram of another angle of the axial-flow windwheel shown in Figure 11；

Figure 14 is the schematic diagram of another angle of the axial-flow windwheel shown in Figure 11.

Figure 15 is the pass of the air mass flow with noise of the axial-flow windwheel of the different A/B ratios according to the utility model embodiment It is schematic diagram.

Reference：

Axial-flow windwheel 100,

Wheel hub 1,

Blade 2, leading edge 21, trailing edge 22, outer rim 23, normal pressure face 24, negative pressure face 25,

Groove 26, gap slot 27.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining Description of Drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.

The axial-flow windwheel 100 according to the utility model first aspect embodiment is described below with reference to Fig. 1-Figure 15.

As shown in figure 1, according to the axial-flow windwheel 100 of the utility model first aspect embodiment, including：Wheel hub 1 and many Individual blade 2.

Specifically, multiple blades 2 are located at the outer of wheel hub 1 with being arranged in order along clockwise direction around the central shaft of wheel hub 1 On side face, the front side edge of each blade 2 (such as the clockwise direction that arrow shown in Fig. 1 is pointed to) along clockwise direction is along shape As leading edge 21, each rear lateral edge along clockwise direction of blade 2 is formed as trailing edge 22, and here, " clockwise direction " refers to, Axial-flow windwheel 100 overlooks clockwise direction during its normal pressure face, additionally, " front side edge edge along clockwise direction " refers to, Along the clockwise direction shown in Fig. 1, positioned at the edge of the front side of blade 2；Similarly, " rear side along clockwise direction Edge " refers to, along the clockwise direction shown in Fig. 1, positioned at the edge of the rear side of blade 2.The company of each blade 2 The edge for connecing the outer end of leading edge 21 and trailing edge 22 is formed as outer rim 23, each blade 2 along the central axis direction of wheel hub 1 both sides table Face is respectively formed as normal pressure face 24 and negative pressure face 25.

Wherein, in projection of the axial-flow windwheel 100 in the plane perpendicular to the central shaft of wheel hub 1, by the central shaft of wheel hub 1 The projection of blade 2 is divided into the first perspective plane and the second projection by the line between the midpoint of the outer rim 23 of blade 2, the line Face, the first perspective plane is located at the front side of (such as the clockwise direction shown in Fig. 1) along clockwise direction on the second perspective plane, and Ratio between the area A on the first perspective plane and the area B on the second perspective plane in the range of 0.35 to 0.5, i.e.,：0.35≤A/ B≤0.5.Thus, during axial-flow windwheel 100 runs, axial-flow windwheel 100 can be reduced on the premise of air quantity is ensured Noise in operation process.

Axial-flow windwheel 100 according to the utility model embodiment, can reduce axial-flow windwheel on the premise of air quantity is ensured Noise in 100 operation process, that is to say, that axial-flow windwheel 100 has the advantages that air quantity is big and noise is small.

The aerodynamic noise mechanism of axial-flow windwheel 100：Rotational noise and eddy current crack.Eddy current crack flows through mainly due to air-flow Produce Turbulent Boundary Layer and vortex breakdown to come off during blade 2, cause the pressure fluctuation of blade 2 and produce；Rotational noise is When axial-flow windwheel 100 rotates, the gas medium around the strike of blade 2 causes the pressure fluctuation of ambient gas and is formed, for For given space particle, when blade 2 passes through, the pressure for hitting this particle gas just rises and falls rapidly once, rotation Rotating vane piece 2 is continuously skimmed over one by one, is just constantly be generated pressure fluctuation, the inhomogeneities for causing air-flow very big, so as to surrounding Radiated noise.

In one embodiment of the present utility model, reference picture 3- Fig. 8, the area A on the first perspective plane and the second perspective plane Area B between ratio in the range of 0.38 to 0.45, i.e.,：0.38≤A/B≤0.45.Further, the first perspective plane Area A and the area B on the second perspective plane between ratio be 0.4, A/B=0.4.Here, the value of A/B is smaller, shows the leaf What the blade tip (leading edge 21 of blade 2 and the link position of outer rim 23) of piece 2 was antecurvature is more, and blade tip is relatively sharp.It is this Be referred to as bigger than the sharp degree and camber of conventional conventional lobed is strong antecurvature leaf, theoretical according to strong forward curved vane 2 it is recognised that strong The structure of forward curved vane 2 can suppress to flow through the secondary flow loss of the air stream of blade 2, and reduce along the flowing of the short transverse of blade 2 Loss, improves efficiency, strengthens acting ability, with certain superiority.

The blade 2 of axial-flow windwheel 100 is most of uses AS+ glasses, partly using PP, PC, PA, wherein PA, PC material Wanting for toughness PC and AS materials relative with hardness is preferable, but high cost.Under equalization performance and cost, AS is generally preferentially used + glass.Therefore influenceed by the strength of materials and manufacturing process, it is strong it is antecurvature it is leaf also have itself defect, blade tip position is in fortune at a high speed May be trembleed when making, can also produce other noises, noise performance is unfavorable on the contrary.This is accomplished by mutually being tied with experiment according to theoretical Close, find optimal camber and point degree.According to the substantial amounts of experimental verification of the application, the ratio of A and B on the utility model is leaf Value：Effect is more satisfactory in 0.38≤A/B≤0.45, preferred A/B=0.4.Experimental data and Figure 15 according to table 1 below can To find out, rotating speed is higher, and as A/B=0.4, air quantity is varied less, and noise can but reduce by 2.1 decibels.And from experimental data It can be seen that as A/B changes, air quantity, noise all ensue change, and in A/B=0.4, air quantity change corresponding with noise Low ebb is reached in rule.

The rotating speed of the difference of table 1 A/B, air quantity, noise contrast

In certain embodiments, the ratio between the diameter D1 of wheel hub 1 and the maximum dimension D 2 of blade 2 is 0.23 to 0.29 In the range of, i.e. hub ratio D1/D2 meets：0.23≤D1/D2≤0.29.Preferably, the diameter D1 of wheel hub 1 and blade 2 be most In the range of 0.24 to 0.28, i.e. hub ratio D1/D2 further meets ratio between major diameter D2：0.24≤D1/D2≤ 0.28.Thus, it is possible to make the performance of axial-flow windwheel 100 reach most preferably.

Here, hub ratio is the ratio between the diameter of wheel hub 1 and the maximum gauge of blade 2, is the individual numerical value less than 1, is design axle stream The critically important parameter that wind wheel 100 is used.It can be seen from axial fan practical technique, influence axial-flow windwheel 100 is taken turns Hub than selection be coefficient of total pressure.The big use big hub ratio of coefficient of total pressure, the small use small hub ratio of coefficient of total pressure.Air-conditioning Axial flow blower used by device is fan with low voltage, and coefficient of total pressure is small, using small hub ratio.For the big hub ratio of axial-flow windwheel 100, relatively In the same external diameter of axial-flow windwheel 100, the big blade 2 of wheel hub 1 is short, it is adaptable to the axial-flow windwheel 100 of high-pressure low-flow；Small hub Than relative to the same external diameter of axial-flow windwheel 100, the vanelets 2 of wheel hub 1 are grown, it is adaptable to the axial-flow windwheel 100 of low pressure and mass flow. I.e. hub ratio influences the air quantity and anti-pressure ability of blower fan, for different leaf and different operating modes, it is necessary to according to actual design Different hub ratios, the hub ratio used in the utility model embodiment is drawn by laboratory test results, new using this practicality Type embodiment it is leaf when, the effect in the range of 0.24 to 0.28 of wheel hub 1 is relatively good.

Preferably, when the ratio between the maximum gauge of the diameter of wheel hub 1 and blade 2 is 0.26, i.e. D1/D2=0.26 When, the performance of axial-flow windwheel 100 reaches most preferably.

In certain embodiments, the maximum height H along its Pivot axle of axial-flow windwheel 100 is straight with the maximum of blade 2 Ratio between the D2 of footpath is in the range of 0.29 to 0.34.Thus, it is possible to make the performance of axial-flow windwheel 100 preferable.

Here, the connection of the blade 2 of axial-flow windwheel 100 and wheel hub 1 is by certain blade angle, it is necessary to constrained, But for the blade 2 of space curved surface distribution, the blade profile established angle in leaf section is different on different-diameter, is difficult The installation site of blade 2 is constrained by established angle, therefore blade 2 is stated highly with blower fan diameter ratio by blower fan and is mounted opposite angle Degree.

Blade angle has directly influence on the performance of axial-flow windwheel 100, in other all design parameter identical bars Under part, blade angle size just determines a performance for axial flow blower.Blade angle increases, and will make negative on blade 2 Lotus increases, and so as to directly affect the pressure distribution on the surface of blade 2, increases pressure fluctuation, and causes the loading noise of blade 2 to add Greatly.The established angle of blade 2 reduces, although reduce the load on the surface of blade 2, so that reduce the loading noise of blade 2, but, Too small blade angle will be such that pressure, flow and the efficiency of blower fan all declines, and the blade angle of axial-flow windwheel 100 is to axle stream The influence of fan performance is very big.So, when considering the performance of axial flow blower, blade angle is arbitrarily to increase Or reduce, it is necessary to pass through experimental test verification.

Therefore, in embodiment of the present utility model, by experimental verification, when height H and the blade 2 of axial-flow windwheel 100 Maximum dimension D 2 between ratio meet：When in 0.29≤H/D2≤0.34 so that blade angle is in relatively good angle Scope, it is preferable that the ratio between the maximum height H of its Pivot axle and the maximum dimension D 2 of blade 2 of axial-flow windwheel 100 Value meets：During H/D2=0.315, the performance of axial-flow windwheel 100 is optimal.

In certain embodiments, the quantity of blade 2 is in the range of 2 to 4.The number of blade of axial-flow windwheel 100 is for axle stream Total head, total pressure efficiency, noise, air quantity of wind wheel 100 etc. all have an impact.Understand the number of blade with wheel by ventilation blower practical technique handbook Relation between hub ratio is as shown in Table 2 below：

Relation between the hub ratio and blade quantity of the axial-flow windwheel of table 2

Hub ratio	≤0.3	0.4	0.5	0.6	0.7
						The number of blade	2~6	4~8	6~12	8~16	10~20

Because the preferred hub ratio of the utility model embodiment is 0.26, the number of blade that can be selected according to form is 2~6 Piece.Due to the structural constraint of blade 2 of the present embodiment, when the number of blade is more than 4, as the axial-flow windwheel 100 of integrated injection molding There is a problem of that the demoulding is difficult, it is therefore preferred that the quantity of blade 2 is in the range of 2 to 4.

2~4 fan performances are contrasted according to experimental verification, it is using the leaf of the utility model embodiment and new in this practicality In the range of the blade angle degree of type embodiment, comprehensively reached most preferably in the effect air quantity of 4 blade 2, noise.Preferably, blade 2 is wrapped Include circumferentially four along wheel hub 1.

In certain embodiments, as shown in Figure 9 and Figure 10, one or spaced apart many can be provided with negative pressure face 25 Individual groove 26.Thus, it is possible to reduce axial-flow windwheel 100 in injection moulding process due to the excessive shrink for causing of the thickness of blade 2, interior gas Bubble risk, while the weight of mitigation axial-flow windwheel 100, reduces cost and reduction input power.

In certain embodiments, the thickness direction towards the direction of leading edge 21 depression and along blade 2 is formed with trailing edge 22 to pass through Wear the connecting portion arc transition of the gap slot 27 of blade 2, gap slot 27 and trailing edge 22.By setting gap slot 27, not only may be used To mitigate the weight of blade 2, the load of axial-flow windwheel 100 is reduced, the eddy current loss of the position of trailing edge 22 can also be reduced, so as to subtract Vibration and noise in the operation process of small axial-flow windwheel 100.

In certain embodiments, the leading edge 21 of blade 2 court away from wheel hub 1 bearing of trend (such as shown in Fig. 2 to Under direction) on along clockwise direction (such as the clockwise direction shown in Fig. 1 and Fig. 2) incline extend, blade 2 is along up time It is downward-sloping on the direction of rotation of pin.So that the structure of blade 2 is distributed in space curved surface, so as to ensure that axial-flow windwheel 100 has Preferably performance.

Below with reference to Fig. 1-Figure 15 descriptions according to one axial-flow windwheel of specific embodiment 100 of the utility model.

Reference picture 1, axial-flow windwheel 100 includes wheel hub 1 and is set with being arranged in order along clockwise direction around the central shaft of wheel hub 1 Four blades 2 on the outer peripheral face of wheel hub 1.

Specifically, as shown in figure 1, each blade 2 front side edge edge along clockwise direction is formed as leading edge 21, each blade 2 rear lateral edge along clockwise direction is formed as trailing edge 22, the edge of the connection leading edge 21 of each blade 2 and the outer end of trailing edge 22 Be formed as outer rim 23, each blade 2 is respectively formed as normal pressure face 24 and negative pressure along the both side surface of the central axis direction of wheel hub 1 Power face 25, the leading edge 21 of blade 2 is inclined and extended along clockwise direction on bearing of trend of the court away from wheel hub 1, and blade 2 is along suitable It is downward-sloping on the direction of rotation of hour hands.

The gap slot of the thickness direction penetrating blade 2 being recessed towards the direction of leading edge 21 and along blade 2 is formed with trailing edge 22 27, the connecting portion arc transition of gap slot 27 and trailing edge 22.Negative pressure face 25 is provided with one or spaced apart multiple is recessed Groove 26.

Wherein, the central shaft of wheel hub 1 is arrived in projection of the axial-flow windwheel 100 in the plane perpendicular to the central shaft of wheel hub 1 The projection of blade 2 is divided into the first perspective plane and the second perspective plane, the first projection by the line between the midpoint of the outer rim 23 of blade 2 Face is located at the front side along clockwise direction on the second perspective plane, between the area on the first perspective plane and the area on the second perspective plane Ratio is in the range of 0.38 to 0.45.Ratio between the diameter of wheel hub 1 and the maximum gauge of blade 2 is 0.24 to 0.28 In the range of.The ratio between the maximum height of its Pivot axle and the maximum gauge of blade 2 of axial-flow windwheel 100 is 0.29 To in the range of 0.34.

Axial-flow windwheel 100 according to the utility model embodiment, can efficiently solve the big ability type of current small box The operation big problem of noise of axial-flow windwheel 100 that is used of air-conditioner.

According to the air-conditioner of the utility model second aspect embodiment, including according to the above-mentioned first aspect reality of the utility model Apply the axial-flow windwheel 100 of example.

According to the air-conditioner of the utility model embodiment, by setting the axial-flow windwheel 100 of above-mentioned first aspect embodiment, So as to improve the overall performance of air-conditioner.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", D score, " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axle To ", " radial direction ", the orientation of the instruction such as " circumference " or position relationship be based on orientation shown in the drawings or position relationship, be only for Be easy to description the utility model and simplify describe, rather than indicate imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In description of the present utility model, " multiple " is meant that two or two More than, unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be Mechanically connect, or electrically connect, can also be communication；Can be joined directly together, it is also possible to by the indirect phase of intermediary Even, can be two element internals connection or two interaction relationships of element.For one of ordinary skill in the art For, can as the case may be understand concrete meaning of the above-mentioned term in the utility model.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be with Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area Technical staff the feature of the different embodiments or example described in this specification and different embodiment or example can be entered Row is combined and combined.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： In the case where principle of the present utility model and objective is not departed from various changes, modification, replacement can be carried out to these embodiments And modification, scope of the present utility model limits by claim and its equivalent.

Claims (14)

1. a kind of axial-flow windwheel, it is characterised in that including：

Wheel hub；And

Multiple blades, multiple blade rings are located at the wheel with being arranged in order along clockwise direction around the central shaft of the wheel hub On the outer peripheral face of hub, along leading edge is formed as, each described blade is along up time for each described blade front side edge along clockwise direction The rear lateral edge in pin direction is formed as trailing edge, and the edge of the outer end of the connection leading edge and trailing edge of each blade is formed as Outer rim, each described blade is respectively formed as normal pressure face and negative pressure along the both side surface of the central axis direction of the wheel hub Face,

Wherein, the central shaft of wheel hub described in projection of the axial-flow windwheel in the plane perpendicular to the central shaft of the wheel hub The projection of the blade is divided into the first perspective plane and the second perspective plane, institute to the line between the midpoint of the blade outer rim State the first perspective plane positioned at second perspective plane front side along clockwise direction, and first perspective plane area and institute The ratio between the area on the second perspective plane is stated in the range of 0.35 to 0.5.

2. axial-flow windwheel according to claim 1, it is characterised in that the area on first perspective plane and described second is thrown Ratio between the area in shadow face is in the range of 0.38 to 0.45.

3. axial-flow windwheel according to claim 2, it is characterised in that the area on first perspective plane and described second is thrown Ratio between the area in shadow face is 0.4.

4. axial-flow windwheel according to claim 1, it is characterised in that the diameter of the wheel hub is straight with the maximum of the blade Ratio between footpath is in the range of 0.23 to 0.29.

5. axial-flow windwheel according to claim 4, it is characterised in that the diameter of the wheel hub is straight with the maximum of the blade Ratio between footpath is in the range of 0.24 to 0.28.

6. axial-flow windwheel according to claim 5, it is characterised in that the diameter of the wheel hub is straight with the maximum of the blade Ratio between footpath is 0.26.

7. axial-flow windwheel according to claim 1, it is characterised in that the axial-flow windwheel along its Pivot axle most Ratio between big height and the maximum gauge of the blade is in the range of 0.29 to 0.34.

8. axial-flow windwheel according to claim 7, it is characterised in that the axial-flow windwheel along its Pivot axle most Ratio between big height and the maximum gauge of the blade is 0.315.

9. the axial-flow windwheel according to any one of claim 1-8, it is characterised in that the quantity of the blade is 2 to 4 In the range of.

10. axial-flow windwheel according to claim 9, it is characterised in that the blade is included along the circumferential cloth of the wheel hub Four for putting.

11. axial-flow windwheel according to any one of claim 1-8, it is characterised in that the negative pressure face is provided with one Individual or spaced apart multiple grooves.

12. axial-flow windwheel according to any one of claim 1-8, it is characterised in that be formed with direction on the trailing edge Leading edge direction depression and along the blade thickness direction through the blade gap slot, the gap slot and the tail The connecting portion arc transition of edge.

13. axial-flow windwheel according to any one of claim 1-8, it is characterised in that the leading edge of the blade is towards remote Inclined along clockwise direction on the bearing of trend of the wheel hub and extended, the blade is downward along clockwise direction of rotation Incline.

14. a kind of air-conditioners, it is characterised in that including the axial-flow windwheel any one of claim 1-13.