CN1920309A - Eccentric fan for indoor cabinet air conditioner - Google Patents
Eccentric fan for indoor cabinet air conditioner Download PDFInfo
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- CN1920309A CN1920309A CN 200510092878 CN200510092878A CN1920309A CN 1920309 A CN1920309 A CN 1920309A CN 200510092878 CN200510092878 CN 200510092878 CN 200510092878 A CN200510092878 A CN 200510092878A CN 1920309 A CN1920309 A CN 1920309A
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Abstract
The invention relates to an eccentric fan of bank air condition indoor machine, wherein it comprises: blade wheels, worm frame with gas inlet chamber, wind channel; said blade wheels are mounted inside the chamber with 8-12 blades; the front gas inlet of gas inlet chamber; said blades have one rectify edge coiled towards to the blade wheel rotation direction at the edge near to the gas inlet of blade wheel; the part of blade near to the outer diameter of blade wheel is lightly bended to the rotation direction of blade wheel; and the part near to the inner diameter is lightly bended to the reversed rotation direction; the gas inlet has metal frame. The invention can restrain the generation of turbulent airflow at the surface of blade and the airflow separation to avoid gas reflux, increase the pressure at the gas outlet, improve the ventilate efficiency and reduce the noise.
Description
Technical field
The present invention relates to a kind of fan structure of indoor apparatus of air conditioner, especially the centrifugal cutter structure of cabinet type air conditioner indoor set.
Background technique
What cabinet type air conditioner indoor set used is centrifugal cutter, its supply air system is mainly by impeller, air-inlet cavity (being equivalent to slip ring), parts such as air channel are formed, the centrifugal cutter impeller is high speed rotating under the drive of motor, gas between the blade is under action of centrifugal force, make the space between impeller outer diameter and the air channel form positive pressure (promptly being higher than environment atmospheric pressure), by radially blowing out through the air channel, form negative pressure (being lower than environment atmospheric pressure) at profile ID and intakeport place simultaneously, ambient atmos is under the effect of atmospheric pressure, be absorbed in the impeller, to replenish the gas of discharging, thrown to the air channel and discharge fan by the centrifugal force of impeller again, so continuously gas delivery is gone out.
The supply air system of typical indoor air conditioner cabinet as shown in Figure 1, the intake grill of air communication passing through fan enters the wind chamber, goes into air channel, the vaporizer of blowing over the top through the centrifugal cutter supercharging is laggard, through freezing with the heat exchange of vaporizer, cold airflow enters indoor through the exhaust port of indoor set.
Centrifugal cutter is in rotary course, and gas axially enters the wind chamber along centrifugal cutter, and right-angled bend is flowed out from blade tip by the leaf road then.Because gas has a turning by a relatively large margin in flow process, make the interior gas flow characteristic of centrifugal cutter become complicated unusually.Therefore, though impeller inlet do not have other flow-disturbing body and flow very unimpeded because the work characteristics of centrifugal cutter itself also can make the certain turbulence scale of gas generation.When turbulent gas flow blade, just cause the generation of blade surface turbulent flow.Owing to the viscous resistance of gas itself and the viscous resistance effect between gas and the solid wall surface, the air-flow on blade surface also can form turbulent boundary layer attached to blade surface simultaneously.Because the formation of turbulent boundary layer and coming off will cause the pulsation of blade surface lift, thereby produce aerodynamic noise.
The split cabinet air conditioner is used in daily life widely, and refrigeration (heat) amount and noise are two important indicators weighing its quality.The aeroperformance of air conditioner indoor machine and noise characteristic are the imbodies of these two indexs.The factor that influences the aeroperformance of indoor set and cause it to produce noise is a lot, closely related with whole ventilation system, as the position of motor properties, inlet grid, the structure of vaporizer etc., the capital exerts an influence to the aeroperformance and the noise size of indoor set, but the structure of fan and performance have topmost influence to the aeroperformance of indoor set complete machine, and the aerodynamic noise of fan also occupies very big proportion in the overall noise of indoor set.But up to now, the noise-reducing design of cabinet type air conditioner indoor set, generally all be that parts such as inlet grid, motor, casing, vaporizer and exhaust outlet are carried out improved design, as patent " noise reduction system of air conditioner (96104619.8) will be positioned at the both sides that inlet grid on the front panel is arranged on indoor set in the past; be arranged in both direction air-breathing with exhaust on noise source, acoustically cause the sensation of acoustic noise reducing for the people; Patent " low-noise centrifugal formula ventilation fan (92237199), " the passive noise control device (93208380) of room air conditioner etc. then is to change the noise reduction facility in addition, (99123819.2) are the measures such as structure that increase guide plate at fan outlet, improve vaporizer and ventilation flue " to reduce the noise reduction system of indoor air conditioner cabinet draft noise ", improve the performance of ventilating of air-conditioning, reduce the noise of indoor apparatus of air conditioner, and at the corrective measure of fan itself seldom.
Summary of the invention
Although the most of assemblies in the indoor body of cabinet air conditioner all exert an influence to noise, adopting rational fan structure is the essential method that reduces noise.Purpose of the present invention just is to improve the centrifugal cutter structure that the cabinet-type air conditioner indoor set uses, and fan itself is carried out structure optimization, improves the drafting efficiency of fan, reduces the aerodynamic noise of fan.
The present common used centrifugal cutter of cabinet type air conditioner indoor set, its structural feature is that the number of blade is many, has tens of more than; Runner is short, and inside and outside usually footpath diameter is than D1/D2=0.8～0.95; For increasing the pressure at exhaust outlet place, blade is to the sense of rotation bending.When gas stream during through blade passage, because the viscous resistance of gas itself and the viscous resistance effect between gas and the solid wall surface, the air-flow on blade surface forms turbulent boundary layer attached to blade surface.Disorderly pressure pulsation acts on blade surface and has just produced noise in the turbulent flow boundary layer.And turbulent boundary layer develops more seriously, and then turbulent boundary layer thickness is bigger, turbulence is bigger, and the noise of generation is also just strong.When turbulent boundary layer develops into to a certain degree, will produce boundary layer and peel off, a certain point on blade boundary layer occurs and separates, thereby forms so-called eddy current break-off, thereby will produce bigger aerodynamic noise.Conventional fan is short because of blade passage, and boundary layer is easier to come off; The number of blade is many, then makes the noise stack, has more increased the sound level of noise.
The intensity size of aerodynamic noise in the type fan is by flowing gas state decision in the leaf road.Air-flow is smooth and easy more in the leaf road, and turbulence is more little, and turbulent boundary layer is thin more, and boundary layer is more little from the disengaging effect of blade surface, and then aerodynamic noise is more little.Otherwise air-flow is random more in the leaf road, and then turbulent boundary layer is thick more, and boundary layer is big more from the disengaging effect on the blade surface, and aerodynamic noise is big more.As seen, improve stream condition in the leaf road and can suppress turbulent boundary layer effectively and thicken, weaken the generation that eddy current breaks away from behavior, thereby can reduce this noise intensity effectively.
Gas stream can produce turbulent boundary layer and break-off thereof simultaneously at the pressure side and the suction surface of blade when the leaf road, with regard to its order of severity, at blade suction surface than serious many of the situation of blade pressure surface.When the turbulent boundary layer of blade suction surface produces when coming off, even can be with whole leaf road cross sectional occlusion, thereby the main air flow of Ye Daozhong is obstructed, airspeed is reduced greatly, influence drafting efficiency.
In addition, owing to easily form airflow breakaway in the leaf road, the air-flow of the high-pressure area between impeller outer diameter and the air channel will be got back to the low pressure area of impeller inlet, form backflow phenomenon, cause leakage, also influence the drafting efficiency of fan.
By top analysis explanation, turbulent boundary layer in the impeller leaf road and the disengaging from blade thereof are the principal elements that influences drafting efficiency and fan generation noise.And change flowing gas state in the impeller leaf road, and make air-flow in order, suppress the generation and the development of turbulent boundary layer, postpone the disengaging of turbulent boundary layer, weakening it, to break away from intensity be the effective way that reduces noise, improves drafting efficiency.
For this reason, fan of the present invention comprises impeller and spiral case, and air-inlet cavity, air channel are arranged on the spiral case, and wherein impeller is installed in the air-inlet cavity, and shroud is equipped with at the anterior suction port place of air-inlet cavity, it is characterized in that: described impeller is made up of 8-12 blade; Described blade is positioned on the edge of impeller air inlet side a rectification limit, and described rectification limit is curled into to the impeller sense of rotation by the part edge of this blade near impeller outer diameter.
Extend to internal diameter direction from impeller outer diameter on described rectification limit, and length is no more than 2/3 of blade air inlet side edge length; And the closer to the impeller outer diameter direction, amount of crimp is big more.
From axially seeing of impeller, above-mentioned blade is provided with the part on rectification limit, promptly near the part of impeller outer diameter, omits to the bending of impeller sense of rotation; The part that does not have the rectification limit, promptly near the part of profile ID, slightly to the opposite direction bending of impeller sense of rotation, blade profile slightly is an anti-serpentine.
From axially seeing of impeller, the part edge that blade is provided with the rectification limit is blocked by shroud fully.
The inside and outside footpath diameter of above-mentioned impeller is than being 0.4-0.6.
In addition, there is the metal guard at wind inlet of fan of the present invention place.The mesh wire diameter scope of described metal guard is 1-3mm, and grid order number is 4-12 lattice/inch.
In the said structure,, effectively stoped the low pressure area of air-flow to the impeller inlet place of the high-pressure area between impeller outer diameter and the air channel to reflux, improved the pressure of exhaust outlet simultaneously, improved the drafting efficiency of fan owing to curl to the impeller sense of rotation in the rectification limit.Simultaneously, suppress gas backstreaming, also reduced the turbulence intensity of gas, thereby suppressed the generation and the development of turbulent boundary layer, reduced noise.
Above-mentioned blade slightly to the bending of impeller sense of rotation, can increase the pressure of exhaust outlet near the part of profile ID, improves drafting efficiency; The blade of common impeller is whole to the bending of impeller sense of rotation, because action of centrifugal force, the easier disengaging of turbulent boundary layer of blade surface, thereby generation noise, and blade of the present invention slightly to the opposite direction bending of impeller sense of rotation, can be postponed the disengaging of turbulent boundary layer near the part of impeller outer diameter, weaken it and break away from intensity, thereby reduce noise.
After the impeller suction port installs the metal guard additional, on the one hand because the effect in guard hole, the big burst burble of impeller inlet of flowing through becomes the air-flow of many bursts of small scales, has weakened its turbulence intensity, makes the eddy region of Ye Daonei and the size of turbulent fluctuation speed obtain certain control; On the other hand behind the airflow passes guard, because during the impeller high speed rotating, the axial silk of rectification silk screen will produce the active force consistent with the impeller sense of rotation to the air-flow at impeller inlet place, make the air-flow that flows in the leaf road produce the velocity component that points to blade suction surface, thereby the turbulent boundary layer of blade suction surface is weakened, make the part energy of Ye Daonei main air flow transfer to the boundary layer like this, impel the boundary layer stable not easily separated, thereby turbulence noise obtains corresponding control.
The present invention has been owing to improved the blade structure of fan, and reduced blade quantity, reduced the inside and outside impeller diameter ratio of impeller, thereby reduced the generation and the flow separation phenomenon of turbulent boundary layer, reduced noise; The rectification limit is established at blade intake grill edge, stoped the low pressure area backflow phenomenon of the air-flow of high-pressure area to impeller inlet, increased exhaust outlet pressure, thereby improved ventilation fan efficient, simultaneously, the place installs commutation net cover additional at the impeller intake grill, has further weakened its turbulence intensity, thereby has effectively controlled turbulence noise.
Description of drawings
Fig. 1 is the supply air system structural representation of traditional cabinet type air conditioner indoor set
Fig. 2 is the side sectional view of Fig. 1
Fig. 3 is the fans road flow pattern of traditional cabinet type air conditioner indoor set
Fig. 4 is the blade wheel structure schematic representation of fan of the present invention
Fig. 5 is by axially seeing fan structure schematic representation of the present invention
Fig. 6 is the blade structure schematic representation of fan of the present invention
Fig. 7 is the structural representation after the wind inlet of fan place installs commutation net cover additional
Embodiment
The supply air system of traditional indoor air conditioner cabinet as depicted in figs. 1 and 2, air communication is crossed inlet grid 2 air inlets of cabinet-type air conditioner 10 ', through blowing over the vaporizer 3 of top after the centrifugal cutter 1 ' supercharging.Through with the heat exchange of vaporizer 3, cold airflow enters indoor through the exhaust port 4 of top.The number of blade of fan 1 ' is many, and runner is short, and blade 5 ' is to the sense of rotation bending.Centrifugal cutter 1 ' is in rotary course, and gas axially enters by centrifugal cutter 1 ', and right-angled bend is flowed out from blade tip by the leaf road then.See shown in Figure 3, when gas stream during through blade passage, because the viscous resistance of gas itself and the viscous resistance effect between gas and the solid wall surface attached to blade surface, form turbulent boundary layer 6 at blade 5 ' the lip-deep air-flow.When turbulent boundary layer 6 develops into to a certain degree, will produce boundary layer and peel off, a certain point on blade 5 ' boundary layer occurs and separates, thereby forms so-called eddy current break-off, produces eddy current crack.Because blade is to the sense of rotation bending, and runner is short, under action of centrifugal force, turbulent boundary layer 6 easier coming off, thereby will produce bigger eddy current crack; Because the number of blade is many, the noise of generation superposes, and has more increased the sound level of noise.
See Fig. 4 and Fig. 5, the impeller 7 of fan 1 of the present invention is made up of 8-12 blade 5, is preferably 9 blades, and the inside and outside footpath diameter of above-mentioned impeller 7 is than being 0.4-0.6.Owing to reduce blade quantity, reduced the noise stack, reduced impeller diameter ratio, promptly prolonged blade passage, weaken turbulent boundary layer and come off, thereby reduced noise on the whole.
Described blade 5 is positioned on the edge of suction port 8 a rectification limit 9, and described rectification limit 9 curls into to the sense of rotation of impeller 7 for the part edge near impeller 7 external diameters, and its structure is seen Fig. 6.
From Fig. 4 and Fig. 5 as can be seen, from axially seeing of impeller 7, above-mentioned blade 5 is provided with the part 5a on rectification limit 9, promptly near the part of impeller 7 external diameters, slightly to the bending of impeller sense of rotation; The part that does not have the rectification limit, promptly near the part of impeller 7 internal diameters, slightly to the opposite direction bending of impeller sense of rotation, blade profile slightly is an anti-serpentine.。
The sense of rotation of impeller is among the figure shown in the arrow.During impeller 7 rotations,, effectively stoped the low pressure area of air-flow to impeller suction port 8 places of the high-pressure area between impeller outer diameter and the air channel to reflux, improved the pressure of exhaust outlet simultaneously, improved drafting efficiency owing to curl to impeller 7 sense of rotation in rectification limit 9.Simultaneously, suppress gas backstreaming, also reduced the turbulence intensity of gas, thereby suppressed the generation and the development of turbulent boundary layer, reduced noise.
Fig. 6 as seen, extend to internal diameter direction from impeller outer diameter on described rectification limit 9, length be no more than blade 5 be positioned at suction port 8 places edge length 2/3; Therefore, when fan 1 was installed on the cabinet-type air conditioner indoor set 10, from axially seeing of fan 1, the shroud 11 of fan can block rectification limit part fully, does not influence air intake efficiency, sees Fig. 5.And there is not the part on rectification limit on the blade edge, be positioned at intake grill 8 places that form by shroud 11, make air intake more smooth, and the gas that refluxes, then stopped by rectification limit 9, and the closer to impeller 7 external diameter directions, amount of crimp is big more, be because the closer to external diameter, the trend of gas backstreaming is big more, and this kind structure can stop gas backstreaming to greatest extent, and does not influence intake efficiency.
Above-mentioned blade 5 is provided with the part 5a on rectification limit 9, slightly to the sense of rotation bending of impeller 7, can increase the pressure of exhaust outlet, improves drafting efficiency; The blade of common impeller is whole to the bending of impeller sense of rotation, because action of centrifugal force, the easier disengaging of turbulent boundary layer of blade surface, thereby generation noise, and blade 5 of the present invention does not have the part on rectification limit, slightly to the opposite direction bending of impeller 7 sense of rotation, can postpone the disengaging of turbulent boundary layer, weaken it and break away from intensity, thereby reduce noise.Blade 5 of the present invention is taked said structure, and the boundary layer that can effectively reduce on the suction surface more breaks away from, thereby reduces eddy current crack.
The visible fan 1 of Fig. 7 is installed in the overall structure on the indoor set 10.Can see that from Fig. 7 fan 1 intake grill 8 installs commutation net cover 12 additional.For guaranteeing the intensity and the aerodynamic stability of guard 12, this guard 12 is made for metal.After impeller 7 suction ports 8 install metal guard 12 additional, on the one hand because the effect in guard hole, the big burst burble of impeller suction port 8 of flowing through becomes the air-flow of many bursts of small scales, has weakened its turbulence intensity, makes the eddy region of Ye Daonei and the size of turbulent fluctuation speed obtain certain control; On the other hand behind the airflow passes guard 12, because during impeller 7 high speed rotating, the axial silk of commutation net cover 12 will produce the active force consistent with the impeller sense of rotation to the air-flow at impeller inlet place, make the air-flow that flows in the leaf road produce the velocity component that points to blade suction surface, thereby the turbulent boundary layer of blade suction surface is weakened, make the part energy of Ye Daonei main air flow transfer to the boundary layer like this, impel the boundary layer stable not easily separated, thereby turbulence noise obtains corresponding control.
The structure of metal guard 12 has direct influence to noise reduction sound, different mesh wire diameters and size of mesh opening, and its noise reduction frequency range is also different with noise reduction, and mesh wire diameter and size of mesh opening are more little, and be good more to the noise reduction of high frequency.The present invention under the prerequisite of the drafting efficiency that guarantees fan 1, can be set at 1-3mm according to the noise characteristic of cabinet air-conditioner with the mesh wire diameter scope, and grid order number is 5-15 lattice/inch.
Said structure can reduce the generation and the flow separation phenomenon of fan blade surface turbulent flow boundary layer, reduces noise; The rectification limit at blade intake grill edge, stoped the low pressure area backflow phenomenon of the air-flow of high-pressure area to impeller inlet, and the pressure of increase exhaust outlet, can improve drafting efficiency, simultaneously, the place installs commutation net cover additional at the impeller intake grill, can further weaken turbulence intensity in the wind chamber, thereby has effectively controlled turbulence noise.
Claims (8)
1, a kind of centrifugal cutter of cabinet type air conditioner indoor set comprises impeller and spiral case, and air-inlet cavity, air channel are arranged on the spiral case, and wherein impeller is installed in the air-inlet cavity, and shroud is equipped with at the anterior suction port place of air-inlet cavity, it is characterized in that: described impeller is made up of 8-12 blade; Described blade is positioned on the edge of impeller air inlet side a rectification limit, and described rectification limit is curled into to the impeller sense of rotation by the part edge of this blade near impeller outer diameter.
2, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 1 is characterized in that: extend to internal diameter direction from impeller outer diameter on described rectification limit, and length is no more than 2/3 of blade air inlet side edge length.
3, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 1 is characterized in that: the closer to the impeller outer diameter direction, the amount of crimp on described rectification limit is big more.
4, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 1 is characterized in that: from axially seeing of impeller, described blade is provided with the part on rectification limit, promptly near the part of impeller outer diameter, omits to the bending of impeller sense of rotation; The part that does not have the rectification limit, promptly near the part of profile ID, slightly to the opposite direction bending of impeller sense of rotation, blade profile slightly is an anti-serpentine.
5, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 1 is characterized in that: from axially seeing of impeller, the part edge that blade is provided with the rectification limit is blocked by shroud fully.
6, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 1 is characterized in that: the inside and outside footpath diameter of described impeller is than being 0.4-0.6.
7, according to the centrifugal cutter of the described cabinet type air conditioner indoor set of arbitrary claim in the claim 1 to 6, it is characterized in that: there is the metal guard at described wind inlet of fan place, and this metal guard shrouds wind inlet of fan fully.
8, the centrifugal cutter of cabinet type air conditioner indoor set according to claim 7 is characterized in that: the mesh wire diameter scope of described metal guard is 1-3mm, and grid order number is 4-12 lattice/inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100928783A CN100460688C (en) | 2005-08-23 | 2005-08-23 | Eccentric fan for indoor cabinet air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100928783A CN100460688C (en) | 2005-08-23 | 2005-08-23 | Eccentric fan for indoor cabinet air conditioner |
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| Publication Number | Publication Date |
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| CN1920309A true CN1920309A (en) | 2007-02-28 |
| CN100460688C CN100460688C (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100928783A Active CN100460688C (en) | 2005-08-23 | 2005-08-23 | Eccentric fan for indoor cabinet air conditioner |
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| CN (1) | CN100460688C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202732A (en) * | 2015-10-23 | 2015-12-30 | 珠海格力电器股份有限公司 | Rectifying structure and air conditioner cabinet machine with same |
| CN106194804A (en) * | 2016-08-31 | 2016-12-07 | 青岛海尔股份有限公司 | Centrifugal blower |
| CN106286327A (en) * | 2016-09-29 | 2017-01-04 | 青岛海尔股份有限公司 | Centrifugal blower |
| CN106523433A (en) * | 2016-09-29 | 2017-03-22 | 青岛海尔股份有限公司 | Centrifugal fan |
| CN108019363A (en) * | 2018-01-11 | 2018-05-11 | 广东美的厨房电器制造有限公司 | Blower fan apparatus and smoke machine |
| CN108533511A (en) * | 2018-05-09 | 2018-09-14 | 青岛海尔空调器有限总公司 | Air-supply assembly and cabinet type air conditioner indoor set with the air-supply assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2310889Y (en) * | 1997-09-05 | 1999-03-17 | 陈谟 | Centrifugal forward and rearward impeller with subcritical leaf |
| CN1141497C (en) * | 1999-06-11 | 2004-03-10 | 建谊国际有限公司 | Free fan with inclined airflow |
| US6856941B2 (en) * | 1998-07-20 | 2005-02-15 | Minebea Co., Ltd. | Impeller blade for axial flow fan having counter-rotating impellers |
| WO2001005652A1 (en) * | 1999-07-16 | 2001-01-25 | Robert Bosch Corporation | Centrifugal impeller with high blade camber |
| JP4358965B2 (en) * | 2000-03-27 | 2009-11-04 | 株式会社日立産機システム | Centrifugal impeller and air purifier |
| JP2004353496A (en) * | 2003-05-28 | 2004-12-16 | Sony Corp | Thin-shaped fan motor |
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- 2005-08-23 CN CNB2005100928783A patent/CN100460688C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202732A (en) * | 2015-10-23 | 2015-12-30 | 珠海格力电器股份有限公司 | Rectifying structure and air conditioner cabinet machine with same |
| CN105202732B (en) * | 2015-10-23 | 2018-03-20 | 珠海格力电器股份有限公司 | A kind of rectifier structure and the cabinet air-conditioner with the structure |
| CN106194804A (en) * | 2016-08-31 | 2016-12-07 | 青岛海尔股份有限公司 | Centrifugal blower |
| CN106286327A (en) * | 2016-09-29 | 2017-01-04 | 青岛海尔股份有限公司 | Centrifugal blower |
| CN106523433A (en) * | 2016-09-29 | 2017-03-22 | 青岛海尔股份有限公司 | Centrifugal fan |
| CN108019363A (en) * | 2018-01-11 | 2018-05-11 | 广东美的厨房电器制造有限公司 | Blower fan apparatus and smoke machine |
| CN108019363B (en) * | 2018-01-11 | 2024-02-20 | 广东美的厨房电器制造有限公司 | Fan device and smoke machine |
| CN108533511A (en) * | 2018-05-09 | 2018-09-14 | 青岛海尔空调器有限总公司 | Air-supply assembly and cabinet type air conditioner indoor set with the air-supply assembly |
| CN108533511B (en) * | 2018-05-09 | 2024-05-03 | 青岛海尔空调器有限总公司 | Air supply assembly and cabinet air conditioner indoor unit with same |
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| CN100460688C (en) | 2009-02-11 |
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