CN204175640U - Centrifugal wind wheel - Google Patents
Centrifugal wind wheel Download PDFInfo
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- CN204175640U CN204175640U CN201420584605.5U CN201420584605U CN204175640U CN 204175640 U CN204175640 U CN 204175640U CN 201420584605 U CN201420584605 U CN 201420584605U CN 204175640 U CN204175640 U CN 204175640U
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Abstract
The utility model discloses a kind of centrifugal wind wheel, comprising: wheel hub, the first outer blade, the second outer blade and internal layer blade.Wheel hub comprises the first surface and second surface that are oppositely arranged, and multiple first outer blade distributes on the first surface along the circumference of wheel hub, and the free end of multiple first outer blade is connected by the first outer shroud.Multiple second outer blade distributes on a second surface along the circumference of wheel hub, and the free end of multiple second outer blade is connected by the second outer shroud.Multiple internal layer blade distributes on a second surface along the circumference of wheel hub, and the free end of multiple internal layer blade is connected by inner ring, and inner ring is positioned at the inner side of the second outer shroud.According to centrifugal wind wheel of the present utility model, air can be accelerated by secondary, thus increase the air quantity of centrifugal wind wheel, be convenient to reduce size, reduce noise.And centrifugal wind wheel is simple and reasonable for structure, structural strength is large, is easy to processing, processing cost is low, applied widely.
Description
Technical field
The utility model relates to field of ventilation equipment, especially relates to a kind of centrifugal wind wheel.
Background technique
Centrifugal wind wheel because of advantages such as its efficiency are high, air quantity is large always adopt by room conditioning, but its noise problem becomes the bottleneck of its performance boost always.For this reason, a lot of producer studies and provides solution, and the most conventional method increases the diameter of centrifugal wind wheel to reduce rotating speed, thus reduce noise.But this kind of method needs to strengthen fuselage size, and strengthen fuselage size and can increase appearance design difficulty and cost difficulty.
Model utility content
The utility model is intended at least solve the technical problem existed in prior art.For this reason, the purpose of this utility model is to provide a kind of centrifugal wind wheel, and this centrifugal wind wheel size is less, air quantity is comparatively large, and the noise of centrifugal wind wheel is less.
Comprise according to centrifugal wind wheel of the present utility model: wheel hub, described wheel hub comprises the first surface and second surface that are oppositely arranged; Multiple first outer blade, described multiple first outer blade is distributed on the outer of described first surface along the circumference of described wheel hub, and the free end of described multiple first outer blade is connected by the first outer shroud; Multiple second outer blade, described multiple second outer blade is distributed on the outer of described second surface along the circumference of described wheel hub, and the free end of described multiple second outer blade is connected by the second outer shroud; Multiple internal layer blade, described multiple internal layer blade is distributed on described second surface along the circumference of described wheel hub, and the free end of described multiple internal layer blade is connected by inner ring, and described inner ring is positioned at the inner side of described second outer shroud.
According to centrifugal wind wheel of the present utility model, accelerate air by increasing by a circle internal layer blade in the outer end of centrifugal wind wheel with secondary, thus improve the structural strength of centrifugal wind wheel, increase the air quantity of centrifugal wind wheel, and then be convenient to reduce size, reduce noise.And centrifugal wind wheel is simple and reasonable for structure, is easy to processing, processing cost is low, applied widely.
In addition, also following additional technical feature can be had according to centrifugal wind wheel of the present utility model:
In embodiments more of the present utility model, the external diameter of described second outer shroud is R, and the external diameter of described inner ring is r, and described R and r meets relation: 0.4R≤r≤0.7R.Here, r >=0.4R, avoids internal layer blade and wheel hub to interfere.And r≤0.7R, the second outer shroud blade and inner ring, internal layer blade can be avoided to interfere.And the interval between internal layer blade and the second outer blade is suitable for, be convenient to the circulation of air, thus improve the efficiency of centrifugal wind wheel.
Particularly, on the axial direction of described wheel hub, the length of each described second outer blade is greater than the length of described internal layer blade.Thus, can ensure that air that internal layer blade is derived leads the second outer blade as much as possible, namely ensures that the air being positioned at the side, outer end of centrifugal wind wheel is as much as possible by twice work doing, thus ensures air flowing in order, reduce unnecessary energy ezpenditure.
Particularly, on the axial direction of described wheel hub, the length of each described first outer blade equals the length of described second outer blade.Thus, on the axial direction of wheel hub, the size of the second outer blade, internal layer blade is enough large, thus ensures the ability of the twice work doing of centrifugal wind wheel, and then ensure that the air quantity of centrifugal wind wheel is comparatively large, also can ensure that centrifugal wind wheel is enough large to be suitable for mounted motor in the inner space of motor side.
Further, the number of described first outer blade, described second outer blade and described internal layer blade is prime number.Thus reduce the noise of centrifugal wind wheel further.
In embodiments more of the present utility model, the number of described second outer blade equals the number of described internal layer blade.
In concrete examples more of the present utility model, the outlet air end of described multiple internal layer blade and the air intake one_to_one corresponding of described multiple second outer blade are arranged.Under the effect of centrifugal force and internal layer blade, the wind of deriving from the outlet air end of internal layer blade flows directly into the air intake of corresponding second outer blade as far as possible, thus reduce the wind of deriving from the outlet air end of internal layer blade and collide the air turbulence that the second outer blade causes, and then reduction gas-flow resistance, reduce the local pressure loss of air-flow, make the blowing of centrifugal wind wheel more smooth and easy, reduce the energy ezpenditure of centrifugal wind wheel.
In other concrete examples of the present utility model, described multiple internal layer blade and described multiple second outer blade are interspersed in the circumferential direction of described wheel hub.Thus meet the demand of the centrifugal wind wheel of some types, reduce the gas-flow resistance of centrifugal wind wheel, be convenient to blowing more smooth and easy.
Particularly, described multiple first outer blade and described multiple second outer blade one_to_one corresponding are arranged.Thus the wind direction of the wind making the wind of each first outer blade derivation and the second corresponding outer blade derive is unanimous on the whole, and then reduce flow perturbation, ensure that blowing is smooth and easy.
Particularly, described multiple first outer blade is identical with the number of described multiple second outer blade.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural upright schematic diagram of the centrifugal wind wheel according to the utility model embodiment;
Fig. 2 is the schematic front view of the centrifugal wind wheel according to the utility model embodiment;
Fig. 3 is the schematic rear view of the centrifugal wind wheel according to the utility model embodiment;
Fig. 4 looks schematic diagram according to a left side for the centrifugal wind wheel of the utility model embodiment;
Fig. 5 is along B-B direction cross-sectional schematic in Fig. 2;
Fig. 6 is along C-C direction cross-sectional schematic in Fig. 4.
Reference character:
Centrifugal wind wheel 100, motor side P1, outer end P2,
Wheel hub 1, first surface 11, second surface 12, convex closure 13, groove 14,
First outer blade 2, first outer shroud 3,
Second outer blade 4, second outer shroud 5, air intake a,
Internal layer blade 6, inner ring 7, outlet air end b.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " length ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
In description of the present utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Below with reference to Fig. 1-Fig. 6, the centrifugal wind wheel 100 according to the utility model embodiment is described.
According to the centrifugal wind wheel 100 of the utility model embodiment, as shown in Figure 1 and Figure 5, comprising: wheel hub 1, multiple first outer blade 2, multiple second outer blade 4 and multiple internal layer blade 6.
Wherein, wheel hub 1 comprises the first surface 11 and second surface 12 that are oppositely arranged, and multiple first outer blade 2 is distributed on the outer of first surface 11 along the circumference of wheel hub 1, and the free end of multiple first outer blade 2 is connected by the first outer shroud 3.Multiple second outer blade 4 is distributed on the outer of second surface 12 along the circumference of wheel hub 1, and the free end of multiple second Outer blade 4 is connected by the second outer shroud 5.Multiple internal layer blade 6 is distributed on second surface 12 along the circumference of wheel hub 1, and the free end of multiple internal layer blade 6 is connected by inner ring 7, and inner ring 7 is positioned at the inner side of the second outer shroud 5.Here, the circumference of wheel hub 1 refers to the direction of the periphery along wheel hub 1, hereafter will repeat no more.
That is, centrifugal wind wheel 100 is divided into motor side P1 and the outer end P2 of isolation mutually by wheel hub 1, the side towards motor side P1 of wheel hub 1 is suitable for mounted motor, and the surface towards motor side P1 of wheel hub 1 is first surface 11, and the surface towards outer end P2 of wheel hub 1 is second surface 12.Wherein, the blade of the motor side P1 of centrifugal wind wheel 100 only has a circle, and namely the motor side P1 of centrifugal wind wheel 100 has the blade row that a circle is made up of multiple first outer blade 2.The outer end P2 of centrifugal wind wheel 100 has two circle blades, wherein, is enclosed within the blade row that by multiple internal layer blade 6 formed on outside the blade row formed by multiple second outer blade 4.Thus, centrifugal wind wheel 100 is simple and reasonable for structure, is easy to processing, processing cost is low, applied widely.
Here, as shown in Figure 1 and Figure 5, the intermediate portion of wheel hub 1 is recessed into towards the direction away from motor side P1, namely the intermediate portion of first surface 11 is formed as the convex closure 13 that protrudes towards the direction away from motor side P1, the intermediate portion of second surface 12 is formed as towards the recessed groove 14 in the direction away from motor side P1, and groove 14 is suitable for mounted motor.It should be noted that, wheel hub 1 is prior art with the mounting structure of motor, is not described in detail here.
When centrifugal wind wheel 100 works, the first outer blade 2, second outer blade 4 and internal layer blade 6 all rotate with identical angular velocity.At motor side P1, air does work via the first outer blade 2 and accelerates, and at outer end P2, air after internal layer blade 6 does work acceleration, then accelerates through the second outer blade 4 acting.
Compared to traditional same outer diameter, the mutually level centrifugal wind wheel being only provided with a circle outer blade, according to the centrifugal wind wheel 100 of the utility model embodiment, air can be accelerated twice owing to adding a circle internal layer blade 6, therefore greatly increase according to the air quantity of the centrifugal wind wheel 100 of the utility model embodiment, and the structural strength of centrifugal wind wheel 100 is larger.And under the prerequisite identical with the air quantity of conventional centrifugal wind wheel 100, the size according to the centrifugal wind wheel 100 of the utility model embodiment can suitably reduce, rotating speed also can suitably reduce, thus realizes the object of noise reduction.
According to the centrifugal wind wheel 100 of the utility model embodiment, air is accelerated with secondary by increasing by a circle internal layer blade 6 at the outer end P2 of centrifugal wind wheel 100, thus improve the structural strength of centrifugal wind wheel 100, increase the air quantity of centrifugal wind wheel 100, and then be convenient to reduce size, reduce noise.And centrifugal wind wheel 100 is simple and reasonable for structure, is easy to processing, processing cost is low, applied widely.
In embodiments more of the present utility model, as shown in Figure 2, the external diameter of the second outer shroud 5 is R, and the external diameter of inner ring 7 is that r, R and r meet relation: 0.4R≤r≤0.7R.
Here, r >=0.4R, makes in radial directions, and inner ring 7 is unlikely too small with the distance of the axis of wheel hub 1, thus avoids internal layer blade 6 to interfere with the convex closure 13 on wheel hub 1.And the second outer blade 4 is between the second outer shroud 5 and inner ring 7, therefore r≤0.7R, can avoid the second outer shroud blade 4 to interfere with inner ring 7, internal layer blade 6.And the interval between internal layer blade 6 and the second outer blade 4 is suitable for, and is convenient to the circulation of air, thus improve the efficiency of centrifugal wind wheel 100.
Particularly, as shown in Figure 4, Figure 5, on the axial direction of wheel hub 1, the length of each second outer blade 4 is greater than the length of internal layer blade 6.Here, the axial direction of wheel hub 1 is the direction in Fig. 4 and Fig. 5 shown in arrow A, will repeat no more in following description.
Like this, can ensure that air that internal layer blade 6 is derived leads the second outer blade 4 as much as possible, namely ensures that the air being positioned at the P2 side, outer end of centrifugal wind wheel 100 is as much as possible by twice work doing, thus ensures air flowing in order, reduce unnecessary energy ezpenditure.
Particularly, on the axial direction of wheel hub 1, the length of each first outer blade 2 equals the length of the second outer blade 4.Like this, on the axial direction of wheel hub 1, the size of the second outer blade 4, internal layer blade 6 is enough large, thus ensure the ability of the twice work doing of centrifugal wind wheel 100, and then ensure that the air quantity of centrifugal wind wheel 100 is comparatively large, also can ensure that centrifugal wind wheel 100 is enough large to be suitable for mounted motor in the inner space of motor side P1.
Here, after centrifugal wind wheel 100 and motor assemble, the central axis of wheel hub 1 and motor shaft central axes, therefore, multiple first outer blade 2, multiple second outer blade 4, multiple internal layer blade 6 are alternatively along the distribution of motor shaft circumference.
Alternatively, multiple first outer blade 2 is equally spaced along the circumference of wheel hub 1, and multiple second outer blade 4 is also equally spaced along the circumference of wheel hub 1, and multiple internal layer blade 6 is also equally spaced along the circumference of wheel hub 1.
Preferably, the number of the first outer blade 2, second outer blade 4 and internal layer blade 6 is prime number.Such as, the quantity of the first outer blade 2 can be 31 or 37, and the quantity of the second outer blade 4 also can be 31 or 37, and the quantity of internal layer blade 6 also can be 31 or 37.
Here, from the correlative study of prior art, when the quantity of the blade of wind wheel is prime number, the noise that wind wheel rotates generation is lower.Therefore in the utility model embodiment, the number of the first outer blade 2, second outer blade 4 and internal layer blade 6 is all set to prime number, thus reduces the noise of centrifugal wind wheel 100 further.
Certainly, according to the actual requirements, the number of the first outer blade 2, second outer blade 4 and internal layer blade 6 also can be the less numeral of other minimum common divisors, and such as, this numeral can be 39.
In embodiments more of the present utility model, the number of the second outer blade 4 equals the number of internal layer blade 6.As in the example of Fig. 2, the number of the second outer blade 4 and the number of internal layer blade 6 are 37.
Particularly, as shown in Figure 2, the outlet air end b of multiple internal layer blade 6 and the air intake a one_to_one corresponding of multiple second outer blade 4 are arranged.That is, at centrifugal wind wheel 100 in the radial direction, internal layer blade 6 is corresponding with the second outer blade 4 to be arranged, like this, under the effect of centrifugal force and internal layer blade 6, the wind of deriving from the outlet air end b of internal layer blade 6 flows directly into the air intake a of corresponding second outer blade 4 as far as possible, thus reduce the wind of deriving from the outlet air end b of internal layer blade 6 and collide the air turbulence that the second outer blade 4 causes, and then reduction gas-flow resistance, reduce the local pressure loss of air-flow, make the blowing of centrifugal wind wheel 100 more smooth and easy, reduce the energy ezpenditure of centrifugal wind wheel 100.
Certainly, the utility model is not limited thereto, known according to putting into practice of inventor, in the centrifugal wind wheel 100 of some types, in radial directions, between internal layer blade 6 and the second corresponding outer blade 4, there is certain angle, also can reduce the gas-flow resistance of centrifugal wind wheel 100, be convenient to blowing more smooth and easy.Namely according to actual design demand, multiple internal layer blade 6 and multiple second outer blade 4 also can be interspersed in the circumferential direction of wheel hub 1, and the number of the number of the first outer blade 2 and internal layer blade 6 also can be unequal.
In embodiments more of the present utility model, as shown in Figure 1 and Figure 4, multiple first outer blade 2 is identical with the number of multiple second outer blade 4.
Particularly, multiple first outer blade 2 and multiple second outer blade 4 one_to_one corresponding are arranged, thus the wind direction of the wind making the wind of each first outer blade 2 derivation and the second corresponding outer blade 4 derive is unanimous on the whole, and then reduce flow perturbation, ensure that blowing is smooth and easy.
In the centrifugal wind wheel 100 of the utility model embodiment, centrifugal wind wheel 100 is by arranging two circle blades at outer end P2, thus ensure under the prerequisite of centrifugal wind wheel 100 size constancy, increase the air quantity of centrifugal wind wheel 100, suitably can reduce the rotating speed of centrifugal wind wheel 100 to reduce noise simultaneously.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents.
Claims (10)
1. a centrifugal wind wheel, is characterized in that, comprising:
Wheel hub, described wheel hub comprises the first surface and second surface that are oppositely arranged;
Multiple first outer blade, described multiple first outer blade is distributed on the outer of described first surface along the circumference of described wheel hub, and the free end of described multiple first outer blade is connected by the first outer shroud;
Multiple second outer blade, described multiple second outer blade is distributed on the outer of described second surface along the circumference of described wheel hub, and the free end of described multiple second outer blade is connected by the second outer shroud;
Multiple internal layer blade, described multiple internal layer blade is distributed on described second surface along the circumference of described wheel hub, and the free end of described multiple internal layer blade is connected by inner ring, and described inner ring is positioned at the inner side of described second outer shroud.
2. centrifugal wind wheel according to claim 1, is characterized in that, the external diameter of described second outer shroud is R, and the external diameter of described inner ring is r, and described R and r meets relation: 0.4R≤r≤0.7R.
3. centrifugal wind wheel according to claim 1, is characterized in that, on the axial direction of described wheel hub, the length of each described second outer blade is greater than the length of described internal layer blade.
4. centrifugal wind wheel according to claim 1, is characterized in that, on the axial direction of described wheel hub, the length of each described first outer blade equals the length of described second outer blade.
5. centrifugal wind wheel according to claim 1, is characterized in that, the number of described first outer blade, described second outer blade and described internal layer blade is prime number.
6. centrifugal wind wheel according to claim 1, is characterized in that, the number of described second outer blade equals the number of described internal layer blade.
7. centrifugal wind wheel according to claim 6, is characterized in that, the outlet air end of described multiple internal layer blade and the air intake one_to_one corresponding of described multiple second outer blade are arranged.
8. centrifugal wind wheel according to claim 6, is characterized in that, described multiple internal layer blade and described multiple second outer blade are interspersed in the circumferential direction of described wheel hub.
9. centrifugal wind wheel according to claim 1, is characterized in that, described multiple first outer blade and described multiple second outer blade one_to_one corresponding are arranged.
10. centrifugal wind wheel according to claim 1, is characterized in that, described multiple first outer blade is identical with the number of described multiple second outer blade.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420584605.5U CN204175640U (en) | 2014-10-10 | 2014-10-10 | Centrifugal wind wheel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420584605.5U CN204175640U (en) | 2014-10-10 | 2014-10-10 | Centrifugal wind wheel |
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| CN204175640U true CN204175640U (en) | 2015-02-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465042A (en) * | 2015-12-28 | 2016-04-06 | 褚玉斌 | Double-blade wind wheel |
| CN106524316A (en) * | 2016-12-30 | 2017-03-22 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106524318A (en) * | 2016-12-30 | 2017-03-22 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106678967A (en) * | 2016-12-30 | 2017-05-17 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106678968A (en) * | 2016-12-30 | 2017-05-17 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106765575A (en) * | 2016-12-30 | 2017-05-31 | 广东美的制冷设备有限公司 | Ducting assembly and air-conditioner |
| CN109026829A (en) * | 2018-10-24 | 2018-12-18 | 珠海格力电器股份有限公司 | Centrifugation blade, centrifugal blower and air conditioner |
| CN109578329A (en) * | 2018-12-30 | 2019-04-05 | 上海朴渡信息科技有限公司 | A kind of blower composite impeller and a kind of blower |
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2014
- 2014-10-10 CN CN201420584605.5U patent/CN204175640U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465042A (en) * | 2015-12-28 | 2016-04-06 | 褚玉斌 | Double-blade wind wheel |
| CN106524316A (en) * | 2016-12-30 | 2017-03-22 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106524318A (en) * | 2016-12-30 | 2017-03-22 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106678967A (en) * | 2016-12-30 | 2017-05-17 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106678968A (en) * | 2016-12-30 | 2017-05-17 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106765575A (en) * | 2016-12-30 | 2017-05-31 | 广东美的制冷设备有限公司 | Ducting assembly and air-conditioner |
| CN106678967B (en) * | 2016-12-30 | 2022-04-12 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106678968B (en) * | 2016-12-30 | 2022-04-19 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, combined centrifugal wind wheel and air conditioner |
| CN106765575B (en) * | 2016-12-30 | 2022-06-10 | 广东美的制冷设备有限公司 | Air duct assembly and air conditioner |
| CN109026829A (en) * | 2018-10-24 | 2018-12-18 | 珠海格力电器股份有限公司 | Centrifugation blade, centrifugal blower and air conditioner |
| CN109578329A (en) * | 2018-12-30 | 2019-04-05 | 上海朴渡信息科技有限公司 | A kind of blower composite impeller and a kind of blower |
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