CN103835992A - Fan blade capable of blowing air in diffused mode and fan blade support - Google Patents
Fan blade capable of blowing air in diffused mode and fan blade support Download PDFInfo
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- CN103835992A CN103835992A CN201410062824.1A CN201410062824A CN103835992A CN 103835992 A CN103835992 A CN 103835992A CN 201410062824 A CN201410062824 A CN 201410062824A CN 103835992 A CN103835992 A CN 103835992A
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Abstract
The invention provides a fan blade capable of blowing air in a diffused mode and a fan blade support. The fan blade capable of blowing air in the diffused mode is provided with five blade bodies and is designed according to the data parameters such as the blade root curve, the blade tip curve, the front edge curve, the rear edge curve, a hub external diameter and the blade external diameters. According to the fan blade capable of blowing air in the diffused mode, the external diameter is small, the blast capacity is high, and noise generated by the fan blade is low; through the designed blade curved surface structure, air is blown by the fan blade in the diffused mode instead of the focused mode; in addition, due to the fact that blade bodies with even thicknesses are replaced by the blade bodies with gradually-changed thicknesses, deformation of the blade bodies when the blade bodies operate can be reduced; furthermore, turbulent air flow is generated on the tip of the blade when the fan blade rotates, noise generated by the fan blade can be lowered. By the adoption of the fan blade support which is used in cooperation with the fan blade capable of blowing air in the diffused mode, the blast capacity of the fan blade can be effectively improved, the air blown by the fan blade can be better diffused around, and electric elements which are arranged around the fan blade can be better cooled by the fan blade.
Description
Technical field
The present invention relates to field of household appliances, more specifically, relate to a kind of blade rack that blowing type flabellum and a kind of and described diffusion blowing type flabellum are used in conjunction with that spreads.
Background technique
Along with people's living standard improves, the microwave oven of Wind Volume low noise is the current active demands of people.The design of the flabellum on microwave oven need to be in meeting heat sinking function, the standing in scope people by noise control.
As shown in Figure 1, microwave oven comprises: U plate 100 ', top board 101 ', rear plate 102 ', base plate 103 ', magnetron 104 ', waveguide 105 ', direct current source plate, fan component (comprising motor, flabellum and blade rack) 107 ', frequency converter assembly (comprising frequency variator and frequency variator IGBT) 108 ', wind scooper 109 ' etc.Waveguide is welded on U plate outside, and magnetron is fixed by screws on waveguide, and frequency converter assembly is arranged on base plate.Magnetron and frequency converter assembly self can generate heat in the course of the work, and these heats dispel the heat by flabellum assembly.
Magnetron and transformer device that the wind direction of the wind that the flabellum of prior art blows out is difficult to realize to separating up and down setting simultaneously fully dispel the heat.Flabellum (flabellums of 4 blade types) easily causes resonance in the time rotating, and causes flabellum to rock, and produces noise, and causes wind direction unstable, reduces flabellum heat dispersion.Its concrete reason comprises: the flabellum of design selects the mode that increases external diameter to increase air quantity (external diameter is 124m), the curved design of blade is simple (leading edge curve, trailing edge curve, blade root curve and blade tip curve are the curve of single radian) comparatively, in addition, the thickness homogeneous (being 1mm) of the blade of design, the flabellum of this kind of structure can produce very large aerodynamic noise in the time of work, and microwave oven has a strong impact in use daily life and produces to use detests sense.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
For this reason, the invention provides a kind of diffusion blowing type flabellum, the noise that its flabellum external diameter is little, air quantity large, produce is little; The spoon of blade structure of design, the wind direction of the wind that flabellum can be blown out changes diffused into by focus type; In addition, the blade that is progressive thickness by the blade design of uniform thickness, the amount of deformation can reduce blade working time; And when flabellum rotates, air-flow is turbulent flow at blade tip place, can reduce flabellum noise.
The embodiment of first aspect present invention provides a kind of diffusion blowing type flabellum, described flabellum is the flabellum of 5 blade types, the blade root curve of described blade, being projected as 18.0a～19.0amm, being projected as 17.0a～18.0a mm in the plane perpendicular to flabellum axis on flabellum axial direction, the blade tip curve of described blade, being projected as 29.0a～31.0a mm, being projected as 54.0a～55.0a mm in the plane perpendicular to flabellum axis on flabellum axial direction, the leading edge curve of described blade, its length is that 42.0a～44.0a mm, maximum camber are 2.8a～3.2a mm, the trailing edge curve of described blade, its length is that 39.0a～41.0a mm, maximum camber are 1.2a～1.6a mm, the projection of described flabellum in the plane perpendicular to flabellum axis, distance between the projection of its blade root curve of blade described in adjacent two is 4.5a～5.5amm, the leaf slightly distance between the projection of curve is 20.5a～21.5a mm, on the leading edge curve closing on, on the leading edge length of curve position of 0.9 times of blade tip side and trailing edge curve, the distance between the projection of the trailing edge length of curve position of 0.9 times of blade tip side is 9.5a～10.5a mm, and described in adjacent two, the distance between the leading edge curve of rear side and the projection at the trailing edge curve of front side of blade is increased to blade tip gradually by blade root, the thickness at the leading edge place of described blade is that the thickness at 2.0a～3.0a mm, trailing edge place is 0.4a～0.8a mm, the external diameter of described flabellum is 115a～117a mm, and the wheel hub external diameter of described flabellum is 35.6a～37.5a mm, wherein, a is greater than 0.
Flabellum provided by the invention, the noise that its flabellum external diameter is little, air quantity large, produce is little; The spoon of blade structure of design, the wind direction of the wind that flabellum can be blown out changes diffused into by focus type; In addition, the blade that is progressive thickness by the blade design of uniform thickness, the amount of deformation can reduce blade working time; And when flabellum rotates, air-flow is turbulent flow at blade tip place, can reduce flabellum noise.
Diffusion blowing type flabellum provided by the invention other flabellums identical with the number of blade, that blade outside dimension is identical are compared, can increase the air quantity of the wind that upper and lower (or left and right) direction is blown out, be more conducive to the electrical apparatus element of upper and lower (or left and right) direction setting to dispel the heat.
According to one embodiment of present invention, the hub height of described flabellum is 22.0a～24.0a mm, and described blade root curve is positioned in the outer wall of described wheel hub the one end near the inlet side of described flabellum; The wind that the wheel hub of this structure can blow out flabellum in the time that flabellum is dried plays leading role, accelerates flabellum the electrical apparatus element of upper and lower (or left and right) direction setting are dispelled the heat.
According to one embodiment of present invention, the thickness of described blade reduces to trailing edge place gradually from the leading edge place of described blade, can make the curved surface of blade more level and smooth, to reduce impact and the obstruction to air-flow, increases blowing amount.
According to one embodiment of present invention, the blade tip curve of described blade is positioned on the cylndrical surface with described flabellum axis coaxle, makes the surface area of blade larger, thereby increases the exhaust air rate of flabellum.
According to one embodiment of present invention, the maximum camber of described blade root curve, described blade tip curve, described leading edge curve and described trailing edge curve is all positioned at the middle part of curve.
According to one embodiment of present invention, described wheel hub is the hollow circular cylinder towards the inlet side of described flabellum opening, and described cylindrical sidewall thickness is 1.8a～2.2a mm, the Thickness Design of wheel hub is the requirement that 1.8a～2.2a mm can meet wheel hub intensity.
According to one embodiment of present invention, on described cylindrical inwall, be provided with positioning bar, the live axle of motor can be arranged in cylindrical opening and position by positioning bar, and positioning bar also can improve cylindrical bulk strength.
According to one embodiment of present invention, a is 1 or 0.8, and the flabellum size of selecting above-mentioned two parameters to make is less, and meets the heat radiation requirement of microwave oven, can be applied to better on microwave oven.
The embodiment of second aspect present invention provides a kind of blade rack, for being used in combination with the diffusion blowing type flabellum described in above-mentioned arbitrary embodiment, beeline between the air-ducting ring of described blade rack and the blade tip of described flabellum is 2.0a～4.0a mm, and wherein, a is greater than 0.
The support of flabellum provided by the invention, beeline between air-ducting ring and blade tip is designed to 2.0a～4.0a mm and is used in conjunction with diffusion blowing type, can effectively increase the exhaust air rate of flabellum, and the wind that flabellum is discharged is spread to surrounding better, can make the radiating effect of the electrical apparatus element of flabellum to upper and lower (or left and right) direction layout better.
According to one embodiment of present invention, on the top board of described blade rack, offer intake grill, described intake grill is positioned at the inlet side of described blade rack, to increase the air output of flabellum inlet side.
In sum, flabellum provided by the invention, the noise that its flabellum external diameter is little, air quantity large, produce is little; The spoon of blade structure of design, the wind direction of the wind that flabellum can be blown out changes diffused into by focus type; In addition, the blade that is progressive thickness by the blade design of uniform thickness, the amount of deformation can reduce blade working time; And when flabellum rotates, air-flow is turbulent flow at blade tip place, can reduce fan noise.
Additional aspect of the present invention and advantage will become in description part below obviously, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming embodiment's description obviously and easily, wherein:
Fig. 1 is related art microwave oven one embodiment's structural representation;
Fig. 2 is the structural representation of diffusion blowing type flabellum of the present invention;
Fig. 3 spreads the structural representation that blowing type flabellum Leaf is connected with wheel hub shown in Fig. 2;
Fig. 4 is the main TV structure schematic diagram that spreads blowing type flabellum shown in Fig. 2;
Fig. 5 is the decomposition texture schematic diagram of flabellum, blade rack and motor.
Wherein, in Fig. 1, the corresponding relation between reference character and component names is:
100 ' U plate, 101 ' top board, 102 ' rear plate, 103 ' base plate, 104 ' magnetron, 105 ' waveguide, 107 ' fan component, 108 ' frequency converter assembly, 109 ' wind scooper.
Corresponding relation in Fig. 2 to Fig. 5 between reference character and component names is:
1 blade, 11 blade root curves, 12 blade tip curves, 13 leading edge curves, 14 trailing edge curves, 2 wheel hubs, 21 positioning bars, 3 flabellum axis, 4 blade racks, 41 air-ducting ring, 42 top boards, 43 intake grills, 5 motors.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from mode described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Diffusion blowing type flabellum provided by the invention, as shown in Figures 2 to 5, described flabellum is the flabellum of 5 blade types, the blade root curve 11 of described blade 1, being projected as 18.0a～19.0a mm, being projected as 17.0a～18.0a mm in the plane perpendicular to flabellum axis 3 in flabellum axis 3 directions, the blade tip curve 12 of described blade 1, being projected as 29.0a～31.0a mm, being projected as 54.0a～55.0a mm in the plane perpendicular to flabellum axis 3 in flabellum axis 3 directions, the leading edge curve 13 of described blade 1, its length is that 42.0a～44.0a mm, maximum camber are 2.8a～3.2a mm, the trailing edge curve 14 of described blade 1, its length is that 39.0a～41.0a mm, maximum camber are 1.2a～1.6a mm, the projection of described flabellum in the plane perpendicular to flabellum axis 3, distance C between the projection of its blade root curve 11 of blade 1 described in adjacent two is 4.5a～5.5a mm, the leaf slightly distance B between the projection of curve is 20.5a～21.5a mm, on the leading edge curve 13 closing on, on the leading edge curve of the 0.9 times 13 extension position places of blade tip side and trailing edge curve 14, the distance E between the projection at the trailing edge curve 14 extension position places of 0.9 times of blade tip side is 9.5a～10.5a mm, and described in adjacent two, the distance between the leading edge curve 13 of rear side and the projection at the trailing edge curve 14 of front side of blade 1 is increased to blade tip gradually by blade root, the thickness at the leading edge place of described blade 1 is that the thickness at 2.0a～3.0a mm, trailing edge place is 0.4a～0.8a mm, the external diameter of described flabellum is 115a～117a mm, and wheel hub 2 external diameters of described flabellum are 35.6a～37.5a mm, wherein, a is greater than 0.
Flabellum provided by the invention, the noise that its flabellum external diameter is little, air quantity large, produce is little; Blade 1 curved-surface structure of design, the wind direction of the wind that flabellum can be blown out changes diffused into by focus type; In addition, the blade of uniform thickness 1 is designed to the blade 1 of progressive thickness, the amount of deformation can reduce blade 1 and work time; And when flabellum rotates, air-flow is turbulent flow at blade tip place, can reduce flabellum noise.
Diffusion blowing type flabellum provided by the invention is compared with blade 1 number other flabellums identical, that blade 1 outside dimension is identical, can increase the air quantity of the wind that upper and lower (or left and right) direction is blown out, be more conducive to the electrical apparatus element of upper and lower (or left and right) direction setting to dispel the heat.
In one embodiment of the present of invention, as shown in Fig. 2, Fig. 3 and Fig. 5, the wheel hub 2 of described flabellum is highly 22.0a～24.0a mm, and described blade root curve 11 is positioned in the outer wall of described wheel hub 2 one end near the inlet side of described flabellum; The wind that the wheel hub 2 of this structure can blow out flabellum in the time that flabellum is dried plays leading role, accelerates flabellum the electrical apparatus element of upper and lower (or left and right) direction setting are dispelled the heat.
Preferably, the thickness of described blade 1 reduces to trailing edge place gradually from the leading edge place of described blade 1, can make the curved surface of blade 1 more level and smooth, to reduce impact and the obstruction to air-flow, increases blowing amount.
Further, as shown in Figure 4, the blade tip curve 12 of described blade 1 be positioned at the coaxial cylndrical surface of described flabellum axis 3 on, make the surface area of blade 1 larger, thereby increase the exhaust air rate of flabellum.
Further again, the maximum camber of described blade root curve 11, described blade tip curve 12, described leading edge curve 13 and described trailing edge curve 14 is all positioned at the middle part of curve.
Wherein, as shown in Figure 2, described wheel hub 2 is the hollow circular cylinder towards the inlet side of described flabellum opening, and described cylindrical sidewall thickness is 1.8a～2.2a mm, and the Thickness Design of wheel hub 2 is the requirement that 1.8a～2.2a mm can meet wheel hub 2 intensity.
And, on described cylindrical inwall, being provided with positioning bar 21, the live axle of motor 5 can be arranged in cylindrical opening and position by positioning bar 21, and positioning bar 21 also can improve cylindrical bulk strength.
In one embodiment of the present of invention, a is 1 or 0.8, and the flabellum size of selecting above-mentioned two parameters to make is less, and meets the heat radiation requirement of microwave oven, can be applied to better on microwave oven.
The present invention also provides a kind of blade rack, as shown in Figure 5, for being used in combination with the diffusion blowing type flabellum described in above-mentioned arbitrary embodiment, the beeline between air-ducting ring 41 and the blade tip of described flabellum of described blade rack 4 is 2.0a～4.0a mm, wherein, a is greater than 0.
The support of flabellum provided by the invention, beeline between air-ducting ring 41 and blade tip is designed to 2.0a～4.0a mm and is used in conjunction with diffusion blowing type, can effectively increase the exhaust air rate of flabellum, and the wind that flabellum is discharged is spread to surrounding better, can make the radiating effect of the electrical apparatus element of flabellum to upper and lower (or left and right) direction layout better.
In one embodiment of the present of invention, on the top board 42 of described blade rack 4, offer intake grill 43, described intake grill 43 is positioned at the inlet side of described blade rack 4, to increase the air output of flabellum inlet side.
In the time that a is 1, adopt the microwave oven and the correlation data that adopts traditional flabellum and blade rack to test following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter) of diffusion blowing type flabellum of the present invention and blade rack:
Wherein, in micro wave oven chamber, fill 1000ML water, microwave heating 30 minutes, to the magnetron leeward side center 1.7mm that holes, Usage data collection device and K type thermocouple carry out thermometry to transformer and anode of magnetron.
Transformer microwave oven temperature rise test comparison is as follows:
Frequency-conversion microwave oven temperature rise test comparison:
By above test result, carry out the analysis of temperature rise test comparison for transformation microwave oven and frequency-conversion microwave oven, can find out under same rotational speed, microwave oven radiating effect of the present invention compared with prior art all has improvement in various degree.
In the time that a is 1, adopt the microwave oven and the correlation data that adopts traditional flabellum and blade rack to test following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter) of diffusion blowing type flabellum of the present invention and blade rack:
Wherein, in semi-anechoic room, fill 1000ML water in micro wave oven chamber, microwave heating, according to GB, adopts 5 points (front, back, left, right, up, 5 orientation) to carry out noise-measuring.
Frequency-conversion microwave oven noise test comparison
| Flabellum kind | Flabellum installation rotating speed | Noise/dB |
| Prior art flabellum | 2300 | 60 |
| Flabellum of the present invention | 2300 | 56.6 |
In the time that a is 0.8, adopt the microwave oven and the correlation data that adopts traditional flabellum and blade rack to test following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter) of diffusion blowing type flabellum of the present invention and blade rack:
Wherein, in micro wave oven chamber, fill 1000ML water, microwave heating 30 minutes, to the magnetron leeward side center 1.7mm that holes, Usage data collection device and K type thermocouple carry out thermometry to transformer and anode of magnetron.
Transformer microwave oven temperature rise test comparison is as follows:
Frequency-conversion microwave oven temperature rise test comparison:
By above test result, carry out the analysis of temperature rise test comparison for transformation microwave oven and frequency-conversion microwave oven, can find out under same rotational speed, microwave oven radiating effect of the present invention compared with prior art all has improvement in various degree.
In the time that a is 0.8, adopt the microwave oven and the correlation data that adopts traditional flabellum and blade rack to test following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter) of diffusion blowing type flabellum of the present invention and blade rack:
Wherein, in semi-anechoic room, fill 1000ML water in micro wave oven chamber, microwave heating, according to GB, adopts 5 points (front, back, left, right, up, 5 orientation) to carry out noise-measuring.
Frequency-conversion microwave oven noise test comparison
| Flabellum kind | Flabellum installation rotating speed | Noise/dB |
| Prior art flabellum | 2400 | 60.8 |
| Flabellum of the present invention | 2400 | 57.5 |
In experiment, drive the motor of flabellum all to adopt identical direct current generator, and rotor diameter is 30mm, input voltage 12V, electric current 0.35A, is fixed on the blade rack shown in Fig. 5.
In the time that a is other numerical value, the size of the air-ducting ring of flabellum of the present invention and blade rack is proportional increase and dwindles, and the air-out mode of flabellum and blade rack can not change, therefore in the time that a gets other numerical value, blade rack that the flabellum identical with external diameter specification with prior art Leaf quantity and air-ducting ring internal diameter are identical is same possesses above-mentioned beneficial effect, does not repeat them here.
In sum, flabellum provided by the invention, the noise that its flabellum external diameter is little, air quantity large, produce is little; The spoon of blade structure of design, the wind direction of the wind that flabellum can be blown out changes diffused into by focus type; In addition, the blade that is progressive thickness by the blade design of uniform thickness, the amount of deformation can reduce blade working time; And when flabellum rotates, air-flow is turbulent flow at blade tip place, can reduce fan noise.
In the description of this specification, the description of term " embodiment " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiments or example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a diffusion blowing type flabellum, described flabellum is the flabellum of 5 blade types, it is characterized in that,
The blade root curve of described blade, being projected as 18.0a～19.0a mm, being projected as 17.0a～18.0a mm in the plane perpendicular to flabellum axis on flabellum axial direction;
The blade tip curve of described blade, being projected as 29.0a～31.0a mm, being projected as 54.0a～55.0a mm in the plane perpendicular to flabellum axis on flabellum axial direction;
The leading edge curve of described blade, its length is that 42.0a～44.0a mm, maximum camber are 2.8a～3.2a mm;
The trailing edge curve of described blade, its length is that 39.0a～41.0a mm, maximum camber are 1.2a～1.6a mm;
The projection of described flabellum in the plane perpendicular to flabellum axis, distance between the projection of its blade root curve of blade described in adjacent two is 4.5a～5.5a mm, the leaf slightly distance between the projection of curve is 20.5a～21.5a mm, on the leading edge curve closing on, on the leading edge length of curve position of 0.9 times of blade tip side and trailing edge curve, the distance between the projection of the trailing edge length of curve position of 0.9 times of blade tip side is 9.5a～10.5a mm, and described in adjacent two, the distance between the leading edge curve of rear side and the projection at the trailing edge curve of front side of blade is increased to blade tip gradually by blade root,
The thickness at the leading edge place of described blade is that the thickness at 2.0a～3.0a mm, trailing edge place is 0.4a～0.8amm;
The external diameter of described flabellum is 115a～117a mm, and the wheel hub external diameter of described flabellum is 35.6a～37.5amm;
Wherein, a is greater than 0.
2. diffusion blowing type flabellum according to claim 1, is characterized in that,
The hub height of described flabellum is 22.0a～24.0a mm, and described blade root curve is positioned in the outer wall of described wheel hub the one end near the inlet side of described flabellum.
3. diffusion blowing type flabellum according to claim 2, is characterized in that,
The thickness of described blade reduces to trailing edge place gradually from the leading edge place of described blade.
4. diffusion blowing type flabellum according to claim 2, is characterized in that,
The blade tip curve of described blade is positioned on the cylndrical surface with described flabellum axis coaxle.
5. diffusion blowing type flabellum according to claim 2, is characterized in that,
The maximum camber of described blade root curve, described blade tip curve, described leading edge curve and described trailing edge curve is all positioned at the middle part of curve.
6. diffusion blowing type flabellum according to claim 2, is characterized in that,
Described wheel hub is the hollow circular cylinder towards the inlet side of described flabellum opening, and described cylindrical sidewall thickness is 1.8a～2.2a mm.
7. diffusion blowing type flabellum according to claim 6, is characterized in that,
On described cylindrical inwall, be provided with positioning bar.
8. according to the diffusion blowing type flabellum described in any one in claim 1 to 7, it is characterized in that,
A is 1 or 0.8.
9. a blade rack, for being used in combination with the diffusion blowing type flabellum as described in claim 1 to 8 any one, is characterized in that,
Beeline between the air-ducting ring of described blade rack and the blade tip of described flabellum is 2.0a～4.0amm, and wherein, a is greater than 0.
10. blade rack according to claim 9, is characterized in that,
On the top board of described blade rack, offer intake grill, described intake grill is positioned at the inlet side of described blade rack.
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| CN201410062824.1A CN103835992B (en) | 2014-02-24 | 2014-02-24 | Diffusion bleed type flabellum and blade rack |
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| CN106499650A (en) * | 2016-11-22 | 2017-03-15 | 广东美的厨房电器制造有限公司 | The radiator fan of microwave oven and the microwave oven with which |
| CN108167222A (en) * | 2017-12-06 | 2018-06-15 | 九阳股份有限公司 | A kind of cooking apparatus quiet fan |
| CN109099009A (en) * | 2018-10-24 | 2018-12-28 | 美的集团股份有限公司 | Axial-flow windwheel, air-conditioner outdoor unit and air conditioner |
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| 李一民: "评价风机叶轮焊接接头力学性能的新技术", 《流体机械》 * |
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| CN108167222A (en) * | 2017-12-06 | 2018-06-15 | 九阳股份有限公司 | A kind of cooking apparatus quiet fan |
| CN109099009A (en) * | 2018-10-24 | 2018-12-28 | 美的集团股份有限公司 | Axial-flow windwheel, air-conditioner outdoor unit and air conditioner |
| CN109099009B (en) * | 2018-10-24 | 2024-05-28 | 美的集团股份有限公司 | Axial flow wind wheel, air conditioner outdoor unit and air conditioner |
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