CN109028348A - Two stage fan system, air-conditioner outdoor unit and air conditioner - Google Patents
Two stage fan system, air-conditioner outdoor unit and air conditioner Download PDFInfo
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- CN109028348A CN109028348A CN201810609757.9A CN201810609757A CN109028348A CN 109028348 A CN109028348 A CN 109028348A CN 201810609757 A CN201810609757 A CN 201810609757A CN 109028348 A CN109028348 A CN 109028348A
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- fan
- air
- heat exchanger
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- fan unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The present invention proposes a kind of two stage fan system, air-conditioner outdoor unit and air conditioner, wherein two stage fan system includes the first fan unit that can be introduced to air from the top of heat exchanger side at the top of heat exchanger, and air can be introduced to the second fan unit at the top of heat exchanger from the lower part of heat exchanger side, first fan unit is located at the top of second fan unit, the shaft of first fan unit and second fan unit is coaxial and is arranged along the vertical direction, and air-conditioner outdoor unit and air conditioner include above-mentioned two stage fan system.The present invention can be improved the uniformity in heat exchanger flow field.
Description
Technical field
The invention belongs to air-conditioning technical field more particularly to a kind of two stage fan systems, air-conditioner outdoor unit and air conditioner.
Background technique
The structure of top air-out outdoor unit is as shown in Figure 1 comprising heat exchanger shell 1' and fan 2', heat exchanger shell 1' tool
There are air outlet 3' and air inlet 4', air outlet 3' to be located at the top of heat exchanger shell, air inlet 4' is located at heat exchanger shell 1''s
Side, fan 2' are aerofoil fan, and fan 2' is rotatably set to the top of heat exchanger shell 1', and the shaft of fan 2' is along vertical
Direction setting, fan 2' are located at the top of heat exchanger shell 1' chamber, when fan 2' rotation, air along Fig. 1 arrow direction from
Air inlet 4' enters, and exports from air outlet 3'.
However, fan 2' is in heat exchanger shell 1' chamber since the height dimension of top air-out outdoor unit heat exchanger is larger
When top rotates, the air quantity for entering to heat exchanger shell 1' chamber interior from air inlet 4' from top to bottom successively successively decreases (such as Fig. 1 institute
Show, arrow direction is air circulation direction, and arrow length represents the air force for entering heat exchanger shell 1' chamber interior), on
Downdraft difference is big up to 3 times, uneven so as to cause heat exchanger Flow Field Distribution, affects the performance of heat exchanger fin performance,
Lower pipeline heat-sinking capability unevenness on heat exchanger is caused, the performance of entire air conditioner is thereby reduced.
Summary of the invention
The present invention proposes that one kind can be improved and changes for above-mentioned technical problem existing for existing top air-out outdoor unit heat exchanger
The two stage fan system of hot device flow field uniformity using the air-conditioner outdoor unit of the two stage fan system, and has the air-conditioning
The air conditioner of device outdoor unit.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of two stage fan system, including air can be introduced to from the top of heat exchanger side at the top of heat exchanger first
Fan unit, and air can be introduced to the second fan unit at the top of heat exchanger from the lower part of heat exchanger side, described
One fan unit is located at the top of second fan unit, the shaft of first fan unit and second fan unit
Coaxially and it is arranged along the vertical direction.
Preferably, first fan unit includes the first fan and the second fan, first fan is hollow, described
Second fan is located at the inside of first fan, and second fan and first fan are coaxially disposed.
Preferably, first fan includes guide ring and the first flabellum, the guide ring is arranged along the vertical direction, institute
State the outside that the first flabellum is fixedly connected on the guide ring, first flabellum be it is multiple, multiple first flabellums along
The guide ring is provided at circumferentially spaced.
Preferably, second fan unit includes pod and the second flabellum, the pod is set along the vertical direction
It sets, second flabellum is fixedly installed on the inside of the pod, and second flabellum is multiple, multiple second flabellums
Along being provided at circumferentially spaced for the pod.
Preferably, setting the pod along axial size as b1, and set the diameter of the first fan hollow space
For D2, then 1%≤(b is set1/D2)≤40%.
Preferably, setting the diameter of second flabellum as D3, and the outer diameter of first fan is set as D1, then it is arranged
30%≤(D3/D1)≤70%.
Preferably, 35%≤(D of setting2/D1)≤75%.
A kind of air-conditioner outdoor unit, including two stage fan system, the two stage fan system are twin-stage wind as described above
Fan system；The heat exchanger further includes heat exchanger shell, and the inside of the heat exchanger shell is formed with chamber, the heat exchanger shell
With air outlet and air inlet, the air outlet is located at the top of the heat exchanger shell, and the air inlet is located at the heat exchange
The side of device shell, first fan unit and second fan unit are rotatably set to the heat exchanger shell chamber
The inside of room, the top that first fan unit corresponds to the air inlet is arranged, by air from the upper of the air inlet
Portion is introduced to the air outlet, and the lower part that second fan unit corresponds to the air inlet is arranged, by air from described
The lower part of air inlet is introduced to the air outlet.
A kind of air conditioner, including air-conditioner outdoor unit, the air-conditioner outdoor unit are heat exchanger as described above.
Compared with prior art, the advantages and positive effects of the present invention are:
1, the present invention is formed as heat exchanger air inlet/outlet and provides the double of power by the first fan unit and the second fan unit
Grade fan system improves heat exchanger air inlet lower part and enters the flow of air, to reduce while improving total blast volume
The gap of air mass flow between heat exchanger air inlet top and the bottom improves heat exchanger flow field uniformity, and then guarantees heat exchange
The normal performance of device fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more improves the performance of entire air conditioner in turn.
2, the present invention is by the first fan of setting and the second fan, so that the first fan unit has the fan of double-round form
Structure, in the process of running, the first fan are mainly used for aspirating the air on heat exchanger air inlet top, together as outer ring fan
When the second fan as inner ring fan, be mainly used for that the air quantity that the second fan unit is directed upwardly into from heat exchanger air inlet is discharged,
Caused by compensate for the operation because of the second fan unit the case where the increase of the first fan unit air quantity, and then further improve
The uniformity in heat exchanger flow field.
3, the air condition of that present invention outdoor unit improves flow field uniformity, and then ensure that by setting two stage fan system
The normal performance of heat exchanger fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more and then improves entire air conditioner
Performance.
4, the air condition of that present invention has the air-conditioner outdoor unit of two stage fan system by setting, improves heat exchanger flow field
Uniformity, and then guarantee the normal performance of heat exchanger fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more and then is improved
The performance of entire air conditioner.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing air-conditioner outdoor unit；
Fig. 2 is the structural schematic diagram of two stage fan system of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the schematic diagram in Fig. 2 after dimension mark；
Fig. 5 is the schematic diagram in Fig. 3 after dimension mark；
Fig. 6 is the structural schematic diagram of the air condition of that present invention outdoor unit；
Fig. 7 is the schematic diagram that air circulation direction is indicated in Fig. 6；
In above each figure: 1', heat exchanger shell；2', fan；3', air outlet；4', air inlet；1, the first fan unit；
2, the second fan unit；3, the first fan；4, the second fan；5, guide ring；6, the first flabellum；7, pod；8, the second flabellum；
9, heat exchanger shell；10, air outlet；11, air inlet；12, the first fan unit wheel hub；13, third flabellum；14, the second fan
Unit wheel hub；15, support shaft；16, motor.
Specific embodiment
In the following, the present invention is specifically described by illustrative embodiment.It should be appreciated, however, that not into one
In the case where step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiments
In.
In the description of the present invention, it should be understood that the arrow direction in (1) Fig. 7 indicates the operation of two stage fan system
Air circulation direction afterwards；(2) orientation or positional relationship of the instructions such as term "inner", "outside", "upper", "lower", "front", "rear" is
Positional relationship based on the figure, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the present invention
Limitation；(3) term " first ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relatively heavy
The property wanted.
Referring to fig. 2 to Fig. 5, a kind of two stage fan system, in top air-out outdoor unit heat exchanger, with for heat exchanger into
Outlet air provides power comprising air can be introduced to the first fan unit 1 at the top of heat exchanger from the top of heat exchanger side,
And air can be introduced to the second fan unit 2 at the top of heat exchanger, the first fan unit 1 from the lower part of heat exchanger side
In the top of the second fan unit 2, the shaft of the first fan unit 1 and the second fan unit 2 is coaxial and sets along the vertical direction
It sets.
Based on above-mentioned, the present invention is formed as heat exchanger air inlet/outlet and is mentioned by the first fan unit 1 and the second fan unit 2
For the two stage fan system of power, while improving total blast volume, the stream that heat exchanger air inlet lower part enters air is improved
Amount, to reduce the gap of air mass flow between heat exchanger air inlet top and the bottom, that is, improves heat exchanger flow field uniformity, into
And guarantee the normal performance of heat exchanger fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more and then improves entire sky
Adjust the performance of device.
The case where first fan unit, 1 air quantity increases caused by order to make up the operation because of the second fan unit 2, the first wind
The structure for fanning unit 1 can be with are as follows: and as shown in Figures 2 and 3, the first fan unit 1 includes the first fan 3 and the second fan 4, and first
Fan 3 is hollow, and the second fan 4 is located at the inside of the first fan 3, and the second fan 4 and the first fan 3 are coaxially disposed.
Based on above-mentioned, the present invention is by the first fan 3 of setting and the second fan 4, so that the first fan unit 1 has double-round
The fan structure of form, referring to Fig. 7, in the process of running, the first fan 3 is used as outer ring fan, is mainly used for aspirating heat exchanger
The air on air inlet top, while the second fan 4 is used as inner ring fan, is mainly used for being discharged the second fan unit 2 from heat exchanger
The air quantity that air inlet is directed upwardly into increases to compensate for 1 air quantity of the first fan unit caused by the operation because of the second fan unit 2
The case where, and then further improve the uniformity in heat exchanger flow field.
It, can be with for the structure of the first fan 3 are as follows: as shown in Figures 2 and 3, the first fan 3 is aerofoil fan, first
Fan 3 includes guide ring 5 and the first flabellum 6, and guide ring 5 is circular hollow tubular, and guide ring 5 is arranged along the vertical direction, and first
Flabellum 6 is fixedly connected on the outside of guide ring 5, the first flabellum 6 be it is multiple, between circumferential direction of multiple first flabellums 6 along guide ring 5
Every setting.
It, can be with for the structure of the second fan 4 are as follows: as shown in figure 3, the second fan 4 is aerofoil fan, the second fan 4
Including the first fan unit wheel hub 12 and third flabellum 13, the first fan unit wheel hub 12 and guide ring 5 are coaxial, third flabellum 13
Positioned at the first fan unit wheel hub 12 between guide ring 5, third flabellum 13 is integrated with the first fan unit wheel hub 12 fixed
Connection, third flabellum 13 be it is multiple, multiple third flabellums 13 are provided at circumferentially spaced along the first fan unit wheel hub 12.
Further as shown in figure 3, for the connection relationship between the second fan 4 and first fan 3, preferably fix
Connection, to reduce the quantity of required driving element, is dropped with realizing the synchronous rotation of the second fan 4 and first fan 3
Low cost and control efficiency is improved, it is specific: one end of third flabellum 13 and 12 outer surface one of the first fan unit wheel hub
Body is fixedly connected, and the other end of third flabellum 13 is integrated with the inner surface of guide ring 5 to be fixedly connected.
It, can be with for the structure of the second fan unit 2 are as follows: as shown in Fig. 2, the second fan unit 2 is aerofoil fan, the
Two fan units 2 include pod 7, the second fan unit wheel hub 14 and the second flabellum 8, and pod 7 is circular hollow tubular, are led
Stream cover 7 is arranged along the vertical direction, and pod 7 is used to concentrating the air of heat exchanger air inlet lower part into the inside for guiding guide ring 5 into,
Pod 7 and guide ring 5 are coaxial, and pod 7 is sheathed on the outside of the second fan unit wheel hub 14, the second fan unit wheel hub 14
It is coaxial with pod 7, the second flabellum 8 between the second fan unit wheel hub 14 and pod 7, one end of the second flabellum 8 with
Second fan unit wheel hub, 14 outer surface integration is fixedly connected, the other end of the second flabellum 8 and the inner surface one of pod 7
Change is fixedly connected, and the second flabellum 8 is multiple, multiple being provided at circumferentially spaced along pod 7 of second flabellum 8.
The air of second fan unit 2 output concentrates the inside for flowing to the first guide ring 5,3 row of undertaking of the first fan
The burden of 2 delivery air of the second fan unit is put with regard to smaller, while the first fan 3 undertakes the sky for introducing heat exchanger air inlet top
The effect of gas is bigger, is based on this, in order to guarantee that air derived from pod 7 has preferable convergence, such as Fig. 4 and Fig. 5 institute
Show, if pod 7 is b along axial size1, and the diameter of 3 hollow space of the first fan is set as D2, then 1%≤(b is set1/
D2)≤40% guarantees that the second fan unit 2 is defeated so as to guarantee that air derived from pod 7 has preferable convergence
Air out is more flowed to the inside of the first guide ring 5, thus guarantee the first fan 3 undertake biggish introducing heat exchanger into
The effect of air port upper air, and then during the operation of two stage fan system, guarantee that heat exchanger has higher flow field
Uniformity.
In order to guarantee that heat exchanger inner air uniformly circulates upwards, the uniformity in heat exchanger flow field is improved, such as Fig. 4 and Fig. 5
It is shown, if the diameter of the second flabellum 8 is D3, and the outer diameter of the first fan 3 is set as D1, then 30%≤(D is set3/D1)≤70%,
To be further ensured that the uniformity in heat exchanger flow field.
In addition, further as shown in Figure 4 and Figure 5,35%≤(D is arranged to guarantee the higher air output of heat exchanger2/D1)
≤ 75%.
Further as shown in Fig. 2, being preferably for the connection relationship between the second fan unit 2 and the first fan unit 1
It is fixedly connected, to realize the synchronous rotation between the second fan unit 2 and the first fan unit 1, thus driving member needed for reducing
The quantity of part reduces costs and improves control efficiency, and specific: two stage fan system further includes support shaft 15, support shaft
15 are arranged along the vertical direction, and the first fan unit wheel hub 12 is hollow along the vertical direction, and the first fan unit wheel hub 12 is fixedly attached
In the outside of support shaft 15, to realize the synchronous rotation with support shaft 15, the second fan unit wheel hub 14 is hollow along the vertical direction,
Second fan unit wheel hub 14 is fixedly sheathed in the outside of support shaft 15, to realize the synchronous rotation with support shaft 15.
Referring to Fig. 6 and Fig. 7, the invention further relates to a kind of air-conditioner outdoor unit, including two stage fan system, the two stage fans
The specific structure of system is referring to above-described embodiment, since this air-conditioner outdoor unit uses whole technologies of above-mentioned all embodiments
Scheme, therefore at least all beneficial effects brought by the technical solution with above-described embodiment, this is no longer going to repeat them；It should
Air-conditioner outdoor unit further includes heat exchanger shell 9, and the inside of heat exchanger shell 9 is formed with chamber, and heat exchanger shell 9 has outlet air
Mouth 10 and air inlet 11, air outlet 10 are located at the top of heat exchanger shell 9, and air inlet 11 is located at the side of heat exchanger shell 9, the
One fan unit 1 is rotatably set to the top of heat exchanger shell 9, and the second fan unit 2 is rotatably set to heat exchanger shell 9
The inside of chamber, the top that the first fan unit 1 corresponds to air inlet 11 are arranged, and air is introduced from the top of air inlet 11
To air outlet 10, the lower part that the second fan unit 2 corresponds to air inlet 11 is arranged, and air is introduced from the lower part of air inlet 11
To air outlet 10.
Based on above-mentioned, the air condition of that present invention outdoor unit improves flow field uniformity, in turn by setting two stage fan system
Guarantee the normal performance of heat exchanger fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more and then improves entire air-conditioning
The performance of device.
It, can be in order to realize the driving to the first fan unit 1 and the second fan unit 2 are as follows: as shown in fig. 6, heat exchange
9 chamber of device shell is internally provided with motor 16, and motor 16 is set between the first fan unit 1 and the second fan unit 2, electricity
There are two power output ends for the tool of machine 16, to drive the first fan unit 1 and the second fan unit 2 to rotate respectively.
Illustrate the present invention in order to clearer, below with regard to twin-stage wind in the present invention by taking Fig. 1 to embodiment shown in Fig. 3 as an example
The course of work of fan system illustrates:
Support shaft 15 is driven to rotate by motor 16, to drive the first fan 3, the second fan 4 and the second fan unit 2 same
Air outside heat exchanger shell 9 is then introduced heat exchanger shell 9 by the air inlet 11 of heat exchanger shell 9 by step rotation
The inside of chamber, and the air outlet 10 of heat exchanger shell 9 is travelled up to, it is flowed finally by the air outlet 10 of heat exchanger shell 9
Out to the outside of heat exchanger shell 9；
In the above process, air is introduced to heat exchanger shell from the lower part of 9 air inlet of heat exchanger shell by the second fan unit 2
The inside of 9 chamber of body, and direct the air to the second fan 4, the air that the second fan 4 exports the second fan unit 2 is upward
Be expelled to the air outlet 10 of heat exchanger shell 9, the first fan 3 aspirates the air on 11 top of heat exchanger air inlet, and by air to
On be expelled to the air outlet 10 of heat exchanger shell 9.
The invention further relates to a kind of air conditioner, including air-conditioner outdoor unit, the specific structure references of the air-conditioner outdoor unit
Above-described embodiment at least has above-mentioned reality since this air conditioner uses whole technical solutions of above-mentioned all embodiments
All beneficial effects brought by the technical solution of example are applied, this is no longer going to repeat them.
Based on above-mentioned, the air condition of that present invention has the air-conditioner outdoor unit of two stage fan system by setting, improves and changes
Hot device flow field uniformity, and then guarantee the normal performance of heat exchanger fin performance, so that lower pipeline Homogeneouslly-radiating on heat exchanger, more
And then improve the performance of entire air conditioner.
Claims (9)
1. a kind of two stage fan system, in air conditioner, it is characterised in that: including can be by air from the top of heat exchanger side
The first fan unit (1) being introduced at the top of heat exchanger, and air can be introduced to heat exchanger from the lower part of heat exchanger side
Second fan unit (2) at top, first fan unit (1) are located at the top of second fan unit (2), and described
The shaft of one fan unit (1) and second fan unit (2) is coaxial and is arranged along the vertical direction.
2. two stage fan system according to claim 1, it is characterised in that: first fan unit (1) includes first
Fan (3) and the second fan (4), first fan (3) is hollow, and second fan (4) is located at first fan (3)
Inside, second fan (4) and first fan (3) are coaxially disposed.
3. two stage fan system according to claim 2, it is characterised in that: first fan (3) includes guide ring (5)
And first flabellum (6), the guide ring (5) are arranged along the vertical direction, first flabellum (6) is fixedly connected on the guide ring
(5) outside, first flabellum (6) be it is multiple, between circumferential direction of multiple first flabellums (6) along the guide ring (5)
Every setting.
4. two stage fan system according to claim 2 or 3, it is characterised in that: second fan unit (2) includes leading
Stream cover (7) and the second flabellum (8), the pod (7) are arranged along the vertical direction, and second flabellum (8) is fixedly installed on institute
State the inside of pod (7), second flabellum (8) be it is multiple, multiple second flabellums (8) are along the pod (7)
Be provided at circumferentially spaced.
5. two stage fan system according to claim 4, it is characterised in that: set the pod (7) along axial size
For b1, and the diameter of the first fan (3) hollow space is set as D2, then 1%≤(b is set1/D2)≤40%.
6. two stage fan system according to claim 5, it is characterised in that: set the diameter of second flabellum (8) as D3,
And the outer diameter of first fan (3) is set as D1, then 30%≤(D is set3/D1)≤70%.
7. two stage fan system according to claim 6, it is characterised in that: 35%≤(D of setting2/D1)≤75%.
8. a kind of air-conditioner outdoor unit, it is characterised in that: including two stage fan system, the two stage fan system is as right is wanted
Two stage fan system described in asking any one of 1 to 7；
The air-conditioner outdoor unit further includes heat exchanger shell (9), and the inside of the heat exchanger shell (9) is formed with chamber, described
Heat exchanger shell (9) has air outlet (10) and air inlet (11), and the air outlet (10) is located at the heat exchanger shell (9)
Top, the air inlet (11) are located at the side of the heat exchanger shell (9), first fan unit (1) and described second
Fan unit (2) is rotatably set to the inside of the heat exchanger shell (9) chamber, and first fan unit (1) is corresponding
It is arranged in the top of the air inlet (11), air is introduced to the air outlet from the top of the air inlet (11)
(10), the lower part that second fan unit (2) corresponds to the air inlet (11) is arranged, by air from the air inlet
(11) lower part is introduced to the air outlet (10).
9. a kind of air conditioner, it is characterised in that: including air-conditioner outdoor unit, the air-conditioner outdoor unit is such as claim 8 institute
The air-conditioner outdoor unit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609757.9A CN109028348B (en) | 2018-06-13 | 2018-06-13 | Two-stage fan system, air conditioner outdoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609757.9A CN109028348B (en) | 2018-06-13 | 2018-06-13 | Two-stage fan system, air conditioner outdoor unit and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109028348A true CN109028348A (en) | 2018-12-18 |
| CN109028348B CN109028348B (en) | 2020-12-18 |
Family
ID=64609632
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810609757.9A Active CN109028348B (en) | 2018-06-13 | 2018-06-13 | Two-stage fan system, air conditioner outdoor unit and air conditioner |
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| Country | Link |
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| CN (1) | CN109028348B (en) |
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| CN110150829A (en) * | 2019-06-03 | 2019-08-23 | 中山市瑞驰泰克电子有限公司 | A kind of hair dryer |
| CN111174338A (en) * | 2020-02-19 | 2020-05-19 | 广东美的制冷设备有限公司 | Air conditioner outdoor unit and air conditioner |
| WO2020155350A1 (en) * | 2019-01-30 | 2020-08-06 | 广东美的制冷设备有限公司 | Fan and air conditioner indoor unit having same |
| WO2021057001A1 (en) * | 2019-09-27 | 2021-04-01 | 美的威灵电机技术（上海）有限公司 | Air conditioner outdoor unit and air conditioning apparatus |
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| CN107781919A (en) * | 2017-11-10 | 2018-03-09 | 广东美的暖通设备有限公司 | The control method of air-conditioner outdoor unit, air conditioner and air conditioner |
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| JP2002250544A (en) * | 2001-02-22 | 2002-09-06 | Toshiba Kyaria Kk | Outdoor apparatus of air conditioner |
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| WO2020155350A1 (en) * | 2019-01-30 | 2020-08-06 | 广东美的制冷设备有限公司 | Fan and air conditioner indoor unit having same |
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| Publication number | Publication date |
|---|---|
| CN109028348B (en) | 2020-12-18 |
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