CN108644905B - Air outlet duct structure and air conditioner - Google Patents
Air outlet duct structure and air conditioner Download PDFInfo
- Publication number
- CN108644905B CN108644905B CN201810670565.9A CN201810670565A CN108644905B CN 108644905 B CN108644905 B CN 108644905B CN 201810670565 A CN201810670565 A CN 201810670565A CN 108644905 B CN108644905 B CN 108644905B
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- China
- Prior art keywords
- air
- air outlet
- volute
- centrifugal fan
- suction side
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Links
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003434 inspiratory effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
- F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
The invention provides an air outlet duct structure and an air conditioner. The air outlet air duct structure comprises a double-suction centrifugal fan (1), a first volute (2) and a second volute (3), wherein the first volute (2) is arranged on the first air suction side of the double-suction centrifugal fan (1), the second volute (3) is arranged on the second air suction side of the double-suction centrifugal fan (1), the first volute (2) is provided with a first air outlet (4), and the second volute (3) is provided with a second air outlet (5). According to the air outlet duct structure, the space occupation of the air conditioner can be reduced, and the cost of the air conditioner is reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air outlet duct structure and an air conditioner.
Background
The existing air conditioner gradually improves the comfort requirement, the cabinet air conditioner adopts the design of an upper air outlet and a lower air outlet, the requirements of shower type air supply at the upper air outlet of cold air flow and carpet type air supply at the lower air outlet of hot air flow can be met, and the better air supply effect is realized.
However, at present, a double centrifugal fan is adopted in an air duct of the cabinet air conditioner, and the fans are respectively arranged at the upper position and the lower position, so that the cost is high, the occupied space is large, and the air conditioner is difficult to arrange in a narrower space environment, so that the use of the air conditioner is limited.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the air outlet duct structure and the air conditioner, which can reduce the space occupation of the air conditioner and reduce the cost of the air conditioner.
In order to solve the problems, the invention provides an air outlet air duct structure, which comprises a double-suction centrifugal fan, a first volute and a second volute, wherein the first volute is arranged on a first air suction side of the double-suction centrifugal fan, the second volute is arranged on a second air suction side of the double-suction centrifugal fan, the first volute is provided with a first air outlet, and the second volute is provided with a second air outlet.
Preferably, the first air outlet and the second air outlet face the same direction.
Preferably, the first air outlet and the second air outlet are respectively positioned at two ends of the same diameter of the double-suction centrifugal fan.
Preferably, the first volute comprises a first swirl section and a first expansion section which are sequentially arranged along the air flow direction, and the cross-sectional area of the first expansion section increases gradually along the air flow direction; and/or the second volute comprises a second swirl section and a second expansion section which are sequentially arranged along the air flow direction, and the cross-sectional area of the second expansion section increases gradually along the air flow direction.
Preferably, the first expansion section expands toward the second suction side; and/or the second expansion section expands toward the first suction side.
Preferably, in a plane perpendicular to the central axis of the double suction centrifugal fan, the first expansion section extends in the outlet direction of the first swirl section, and the second expansion section extends in the opposite direction of the outlet direction of the second swirl section.
Preferably, the diameters of the first volute and the second volute at the blades of the double-suction centrifugal fan are 300-400 mm, the diameters of the blades are 240-320 mm, and the axial heights of the blades are 90-140 mm.
According to another aspect of the present invention, there is provided an air conditioner including a housing and an air outlet duct structure provided in the housing, the air outlet duct structure being the air outlet duct structure described above.
Preferably, the shell comprises an upper air outlet and a lower air outlet, the first air outlet is arranged corresponding to the upper air outlet, and the second air outlet is arranged corresponding to the lower air outlet.
Preferably, an air outlet baffle is arranged at the upper air outlet and/or the lower air outlet.
Preferably, the shell is further provided with a first air inlet and a second air inlet, the first air inlet is arranged corresponding to the first air suction side, and the second air inlet is arranged corresponding to the second air suction side.
Preferably, a first heat exchanger and a second heat exchanger are further arranged in the shell, the first heat exchanger is arranged between the first air suction side and the first air inlet, and the second heat exchanger is arranged between the second air suction side and the second air inlet.
The invention provides an air outlet duct structure which comprises a double-suction centrifugal fan, a first volute and a second volute, wherein the first volute is arranged on a first air suction side of the double-suction centrifugal fan, the second volute is arranged on a second air suction side of the double-suction centrifugal fan, the first volute is provided with a first air outlet, and the second volute is provided with a second air outlet. This air-out wind channel structure adopts double suction centrifugal fan to carry out both sides induced draft, can reduce fan quantity, reduction in equipment cost, can reduce the volume of air-out wind channel structure simultaneously, reduces the space occupation of air conditioner, increases the utilization efficiency of fan, improves the amount of wind, can also improve the flow of the circulating air in the room, reinforcing indoor travelling comfort.
Drawings
FIG. 1 is a schematic structural diagram of an air outlet duct structure according to an embodiment of the present invention;
FIG. 2 is a schematic side view of an air outlet duct structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
The reference numerals are expressed as:
1. double suction centrifugal fan; 2. a first volute; 3. a second volute; 4. a first air outlet; 5. a second air outlet; 6. a first swirl section; 7. a first expansion section; 8. a second swirl section; 9. a second expansion section; 10. a housing; 11. an upper air outlet; 12. a lower air outlet; 13. a first air inlet; 14. a second air inlet; 15. a first heat exchanger; 16. and a second heat exchanger.
Detailed Description
Referring to fig. 1 to 3 in combination, according to an embodiment of the present invention, the air outlet duct structure includes a double suction centrifugal fan 1, a first scroll casing 2 and a second scroll casing 3, the first scroll casing 2 is disposed at a first suction side of the double suction centrifugal fan 1, the second scroll casing 3 is disposed at a second suction side of the double suction centrifugal fan 1, the first scroll casing 2 has a first air outlet 4, and the second scroll casing 3 has a second air outlet 5.
This air-out wind channel structure adopts double suction centrifugal fan 1 to carry out both sides induced draft, can reduce fan quantity, reduction in equipment cost, can reduce the volume of air-out wind channel structure simultaneously, reduces the space occupation of air conditioner, increases the utilization efficiency of fan, improves the amount of wind, can also improve the flow of the circulating air in the room, reinforcing indoor travelling comfort.
Preferably, the directions of the first air outlet 4 and the second air outlet 5 are the same, and in general, the air outlets are all away from the installation wall surface and blow towards the direction far away from the wall surface, so that the directions of the first air outlet 4 and the second air outlet 5 are the same, the consistency of the air outlet directions of the first volute 2 and the second volute 3 can be ensured, the maximization of the air outlet volume is realized, and the indoor air can be rapidly adjusted.
The orientation of first air outlet 4 and second air outlet 5 also can be in opposite directions for first air outlet 4 is to the first direction air-out, and second air outlet 5 is to the second direction air-out opposite with first direction, thereby makes the air-out of first air outlet 4 and the air-out of second air outlet 5 can form the circulation, further accelerates indoor air flow efficiency, realizes the quick adjustment of indoor air, can also avoid blowing to the human body directly simultaneously, improves user experience.
Preferably, the first air outlet 4 and the second air outlet 5 are respectively located at two ends of the same diameter of the double-suction centrifugal fan 1, so that the first air outlet 4 and the second air outlet 5 have the largest distance, the mutual influence during air outlet is smaller, the air outlet effect is better, the air outlet coverage area is larger, and the indoor air temperature adjustment is quicker.
In this embodiment, the first spiral case 2 includes the first swirl section 6 and the first expansion section 7 that set gradually along the air flow direction, and first expansion section 7 increases gradually along air flow direction cross-sectional area, and first swirl section 6 can carry out the swirl direction to first suction side inspiratory air current for first suction side inspiratory air blows out from the gas outlet of first swirl section 6 through the water conservancy diversion of first swirl section 6, then carries out the diffusion through first expansion section 7, increases the air-out area and the air-out pressure of first spiral case 2, improves air supply ability and the coverage area of first spiral case 2.
Preferably, the second volute 3 comprises a second cyclone section 8 and a second expansion section 9 which are sequentially arranged along the air flow direction, the cross-sectional area of the second expansion section 9 increases gradually along the air flow direction, the second cyclone section 8 can conduct cyclone guiding on the air flow sucked by the second suction side, the air sucked by the second suction side is blown out from the air outlet of the second cyclone section 8 through the flow guiding of the second cyclone section 8, and then the air is diffused through the second expansion section 9, so that the air outlet area and the air outlet pressure of the second volute 3 are increased, and the air supply capacity and the coverage area of the second volute 3 are improved.
Preferably, the air outlet direction of the air outlet of the first cyclone section 6 is opposite to the air outlet direction of the air outlet of the second cyclone section 8, so that the air outlet directions of the first volute 2 and the second volute 3 at the cyclone sections are opposite, the first expansion section 7 and the second expansion section 9 are staggered, the structural change of the first expansion section 7 and the second expansion section 9 is more convenient to realize, interference between the positions of the first expansion section 7 and the second expansion section 9 on the basis of realizing diffusion is avoided, and the structural design is more reasonable.
Preferably, the first expansion section 7 expands towards the second suction side; and/or, the second expansion section 9 expands towards the first air suction side, so that the projection of the first expansion section 7 and the second expansion section 9 on the central rotating shaft of the double-suction centrifugal fan 1 is at least partially overlapped, the width of the air outlet air duct structure in the axial direction of the double-suction centrifugal fan 1 is reduced, the volume of the air outlet air duct structure is reduced, the occupied space of the air outlet air duct structure is smaller, the miniaturization of the air conditioner is realized, the air conditioner can be suitable for occasions with limited space, sufficient air quantity can be provided, and the working performance of the air conditioner is ensured.
Preferably, the projections of the first expansion section 7 and the second expansion section 9 on the central rotating shaft of the double-suction centrifugal fan 1 are basically completely overlapped on the central rotating shaft of the double-suction centrifugal fan 1, so that the structural design of the air outlet duct structure can be optimized.
Preferably, in a plane perpendicular to the central axis of the double suction centrifugal fan 1, the first diverging section 7 extends in the outlet direction of the first swirl section 6 and the second diverging section 9 extends in the opposite direction in the outlet direction of the second swirl section 8. Because the direction of the first swirl section 6 and the direction of the second swirl section 8 at the air outlet are opposite, how the expansion sections continue to extend along the air outlet direction of the swirl sections can lead to the opposite air outlet directions of the two expansion sections and the same direction air outlet cannot be maintained, and therefore, the extending direction of one expansion section needs to be adjusted to extend reversely, so that the air outlet directions of the first volute 2 and the second volute 3 at the first air outlet 4 and the second air outlet 5 are consistent.
The diameters of the first volute 2 and the second volute 3 at the positions of the blades of the double-suction centrifugal fan 1 are 300-400 mm, the diameters of the blades are 240-320 mm, and the axial heights of the blades are 90-140 mm. When the fan blade of the double-suction centrifugal fan 1 is matched with the volute in size, in order to meet the spiral flow rule in the volute, a certain gap needs to exist between the fan blade and the volute in the axial direction and the radial direction, and the fan blade is designed to be of the size, so that the air quantity can be effectively improved, and the rotation noise and the broadband noise can be effectively reduced.
Referring to fig. 3 in combination, according to an embodiment of the present invention, an air conditioner includes a housing 10 and an air outlet duct structure provided in the housing 10, the air outlet duct structure being the air outlet duct structure described above.
Preferably, the casing 10 includes an upper air outlet 11 and a lower air outlet 12, the first air outlet 4 is arranged corresponding to the upper air outlet 11, and the second air outlet 5 is arranged corresponding to the lower air outlet 12, so that the air conditioner can realize up-and-down distributed air supply, the air supply range and the air supply air quantity are enlarged, the flow of circulating air in a room is improved, and the indoor comfort is enhanced.
Preferably, the upper air outlet 11 and/or the lower air outlet 12 are/is provided with an air outlet baffle, so that the upper air outlet 11 or the lower air outlet 12 can be opened or closed as required, the upper air outlet and the lower air outlet during heating during refrigeration are realized, the shower type air supply of the cold air flow upper air outlet and the carpet type air supply of the hot air flow lower air outlet are met, and the use feeling of a user is further improved.
The shell 10 is further provided with a first air inlet 13 and a second air inlet 14, the first air inlet 13 is arranged corresponding to the first air suction side, the second air inlet 14 is arranged corresponding to the second air suction side, the first air suction side of the double-suction centrifugal fan 1 can be used for air intake through the first air inlet 13, the second air suction side of the double-suction centrifugal fan 1 can be used for air intake through the second air inlet 14, and air intake requirements of the double-suction centrifugal fan 1 are met.
The shell 10 is also internally provided with a first heat exchanger 15 and a second heat exchanger 16, the first heat exchanger 15 is arranged between the first air suction side and the first air inlet 13, and the second heat exchanger 16 is arranged between the second air suction side and the second air inlet 14, so that heat exchange can be carried out on air entering the double-suction centrifugal fan 1, and blown air can meet the requirements.
When the air conditioner works, the motor drives the double-suction centrifugal fan blade to rotate, circulating air flow is sucked from air inlets at two sides under the negative pressure effect of the double-suction centrifugal impeller, enters the double-suction centrifugal impeller after passing through the heat exchanger, and after the impeller works, the air flow at the first suction side is upwards discharged through the first volute 2, and the air flow at the second suction side is downwards discharged through the second volute 3, so that the indoor comfort is improved by the upper and lower distributed air supply under the effect of the double-suction centrifugal impeller, the motor and the two volutes.
Because the double-suction centrifugal fan 1 adopts double-suction air inlets at two sides, indoor air flows from two sides of a room, and forms a wrapped circulating air flow in the room together with upper and lower air outlets, so that the comfort of the room is further improved. Meanwhile, on the basis of improving the comfort and performance of the indoor unit, the centrifugal fan blades share the same motor, so that the number of the motors is reduced, the cost of the indoor unit is reduced, and the problem of insufficient air conditioning space is further solved.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. The utility model provides an air outlet duct structure of cabinet air conditioner, its characterized in that includes double suction centrifugal fan (1), first spiral case (2) and second spiral case (3), first spiral case (2) set up double suction centrifugal fan's (1) first suction side, second spiral case (3) set up double suction centrifugal fan's (1) second suction side, first spiral case (2) have first air outlet (4), second spiral case (3) have second air outlet (5); the first volute (2) comprises a first swirl section (6) and a first expansion section (7) which are sequentially arranged along the air flow direction, and the cross-sectional area of the first expansion section (7) increases progressively along the air flow direction; and/or the second volute (3) comprises a second swirl section (8) and a second expansion section (9) which are sequentially arranged along the air flow direction, wherein the cross-sectional area of the second expansion section (9) increases along the air flow direction; in a plane perpendicular to the central axis of the double suction centrifugal fan (1), the first expansion section (7) extends along the outlet direction of the first cyclone section (6), and the second expansion section (9) extends reversely along the outlet direction of the second cyclone section (8); the first expansion section (7) expands toward the second suction side; and/or the second expansion section (9) expands towards the first suction side.
2. The air outlet duct structure of a cabinet air conditioner according to claim 1, wherein the first air outlet (4) and the second air outlet (5) are oriented in the same direction.
3. The air outlet duct structure of a cabinet air conditioner according to claim 1, wherein the first air outlet (4) and the second air outlet (5) are respectively located at two ends of the same diameter of the double suction centrifugal fan (1).
4. The air outlet duct structure of the cabinet air conditioner according to claim 1, wherein the diameters of the first volute (2) and the second volute (3) at the blade of the double suction centrifugal fan (1) are 300mm-400mm, the diameters of the blades are 240mm-320mm, and the axial heights of the blades are 90mm-140mm.
5. An air conditioner comprising a shell (10) and an air outlet duct structure arranged in the shell (10), wherein the air outlet duct structure is the cabinet air conditioner according to any one of claims 1 to 4.
6. The air conditioner according to claim 5, wherein the housing (10) includes an upper air outlet (11) and a lower air outlet (12), the first air outlet (4) is disposed corresponding to the upper air outlet (11), and the second air outlet (5) is disposed corresponding to the lower air outlet (12).
7. Air conditioner according to claim 6, characterized in that an air outlet baffle is provided at the upper air outlet (11) and/or the lower air outlet (12).
8. The air conditioner according to claim 5, wherein the housing (10) is further provided with a first air inlet (13) and a second air inlet (14), the first air inlet (13) is disposed corresponding to the first air suction side, and the second air inlet (14) is disposed corresponding to the second air suction side.
9. An air conditioner according to claim 8, wherein a first heat exchanger (15) and a second heat exchanger (16) are further arranged in the housing (10), the first heat exchanger (15) being arranged between the first suction side and the first air inlet (13), the second heat exchanger (16) being arranged between the second suction side and the second air inlet (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670565.9A CN108644905B (en) | 2018-06-26 | 2018-06-26 | Air outlet duct structure and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670565.9A CN108644905B (en) | 2018-06-26 | 2018-06-26 | Air outlet duct structure and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108644905A CN108644905A (en) | 2018-10-12 |
| CN108644905B true CN108644905B (en) | 2023-10-27 |
Family
ID=63753744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810670565.9A Active CN108644905B (en) | 2018-06-26 | 2018-06-26 | Air outlet duct structure and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108644905B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340908A (en) * | 2018-11-15 | 2019-02-15 | 珠海格力电器股份有限公司 | Air conditioner indoor unit and air conditioner |
| CN111197597A (en) * | 2018-11-20 | 2020-05-26 | 珠海格力电器股份有限公司 | Centrifugal fan, centrifugal fan assembly and air conditioner with centrifugal fan assembly |
| CN110056963A (en) * | 2019-05-10 | 2019-07-26 | 青岛海尔空调器有限总公司 | Wall-hanging indoor unit of air conditioner |
| CN110160148B (en) * | 2019-06-25 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Vertical cabinet and air conditioner |
| CN110360654A (en) * | 2019-06-25 | 2019-10-22 | 宁波奥克斯电气股份有限公司 | A kind of air-out type packaged air conditioner device up and down |
| CN110836421A (en) * | 2019-11-07 | 2020-02-25 | 珠海格力电器股份有限公司 | Air duct structure and air conditioner |
| CN115479046A (en) * | 2021-05-31 | 2022-12-16 | 广州华凌制冷设备有限公司 | Centrifugal volute, ventilation component with centrifugal volute and air conditioner with centrifugal volute |
| CN114110778B (en) * | 2021-11-10 | 2022-11-11 | 珠海格力电器股份有限公司 | Wall-mounted air conditioner and control method |
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| JPH1096526A (en) * | 1996-09-24 | 1998-04-14 | Mitsubishi Electric Corp | Celing embedded air conditioner |
| CN101813096A (en) * | 2009-02-23 | 2010-08-25 | 乐金电子(天津)电器有限公司 | Double suction sirocco fan with multi-directional wind blowing |
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| KR101271065B1 (en) * | 2007-12-06 | 2013-06-05 | 삼성전자주식회사 | Blower and air conditioner having the same |
| CN206018940U (en) * | 2016-08-25 | 2017-03-15 | 珠海格力电器股份有限公司 | air conditioner |
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| JPH1096526A (en) * | 1996-09-24 | 1998-04-14 | Mitsubishi Electric Corp | Celing embedded air conditioner |
| CN101813096A (en) * | 2009-02-23 | 2010-08-25 | 乐金电子(天津)电器有限公司 | Double suction sirocco fan with multi-directional wind blowing |
| CN106288007A (en) * | 2016-08-25 | 2017-01-04 | 珠海格力电器股份有限公司 | Air conditioner |
| CN106352534A (en) * | 2016-10-21 | 2017-01-25 | 海信（山东）空调有限公司 | Indoor unit of air conditioner |
| CN208475464U (en) * | 2018-06-26 | 2019-02-05 | 珠海格力电器股份有限公司 | Air outlet duct structure and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108644905A (en) | 2018-10-12 |
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