CN209131007U - Air conditioner indoor unit and air conditioner - Google Patents
Air conditioner indoor unit and air conditioner Download PDFInfo
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- CN209131007U CN209131007U CN201821968782.8U CN201821968782U CN209131007U CN 209131007 U CN209131007 U CN 209131007U CN 201821968782 U CN201821968782 U CN 201821968782U CN 209131007 U CN209131007 U CN 209131007U
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Abstract
The utility model discloses a kind of air conditioner indoor unit and air conditioner, wherein air conditioner indoor unit includes shell and the cross flow fan that is disposed in the housing, and the shell is equipped with air inlet and air outlet, and the cross flow fan is between the air inlet and air outlet；The cross flow fan includes spiral case and the wind wheel in the spiral case, the spiral case includes air duct upper wall, air duct lower wall and two air duct side walls, the two air duct side walls are located at the both ends of the air duct lower wall and air duct upper wall length direction, and connect the air duct upper wall and the air duct lower wall；The air duct lower wall is equipped with an at least baffle, and the baffle is between the wind wheel and the air outlet, and adjacent to an air duct side wall, the other end of the baffle extends towards another air duct sidewall direction for one end of the baffle.Technical solutions of the utility model are intended to improve the surge phenomenon of air duct interior air-flow, improve the outlet air efficiency of air conditioner indoor unit, lower power consumption.
Description
Technical field
The utility model relates to air-conditioning technical field, in particular to a kind of air conditioner indoor unit and air conditioner.
Background technique
Existing wall-hanging air conditioner indoor unit, cross flow fan is in the case where normal work, the wind of the left and right sides in air duct
Road side-walls are due to forming step surface so that air-flow is unstable at this, air conditioner in the long-term use, in air duct dust stratification with
And the influence for situations such as hanging water, air duct side-walls are easy to appear periodic surge, and readily diffuse into the middle part of wind wheel, make entire
Recirculating zone diffusion deteriorates, and not only makes the reduction of outlet air efficiency, and function is big.
Utility model content
The main purpose of the utility model is to provide a kind of air conditioner indoor unit, it is intended to which the surge for improving air duct interior air-flow is existing
As improving the outlet air efficiency of air conditioner indoor unit, lower power consumption.
To achieve the above object, the utility model proposes air conditioner indoor unit, including shell and be disposed in the housing
Cross flow fan, the shell are equipped with air inlet and air outlet, and the cross flow fan is between the air inlet and air outlet；
The cross flow fan includes spiral case and the wind wheel in the spiral case, and the spiral case includes air duct upper wall, air duct
Lower wall and two air duct side walls, the two air duct side walls are located at the both ends of the air duct lower wall and air duct upper wall length direction, and
Connect the air duct upper wall and the air duct lower wall；
The air duct lower wall be equipped with an at least baffle, the baffle between the wind wheel and the air outlet,
One end of the baffle is adjacent to an air duct side wall, and the other end of the baffle is towards another air duct sidewall direction
Extend.
Optionally, the baffle includes windward side, and the windward side is located at the baffle towards the one of the wind wheel
Side, the windward side are gradually distance from air duct lower wall direction by the wind wheel to the direction of air outlet and are obliquely installed.
Optionally, the windward side is seamlessly transitted close to the side of the air duct lower wall and the air duct lower wall.
Optionally, the minimum spacing of the air duct upper wall and the air duct lower wall is H, and the windward side is far from the air duct
The spacing of the end of lower wall and the air duct upper wall is h, and the value range of h is 0.69H≤h≤0.90H.
Optionally, the diameter of the wind wheel is D0, the value of the minimum spacing H of the air duct upper wall and the air duct lower wall
Range is 0.4D0≤H≤0.6D0。
Optionally, the baffle further includes the leeward of the adjacent windward side, the leeward be located at it is described windward
Face is tilted close to the side of the air outlet, and by the windward side to the direction of air outlet close to air duct lower wall direction
Setting.
Optionally, the spacing of the two air duct side walls is L, and the baffle is in an air duct side wall towards another described
The development length of air duct sidewall direction is l, 0.075L≤l≤0.21L.
Optionally, on the cross section of the air conditioner indoor unit, the baffle towards the end of wind wheel be endpoint windward, institute
State baffle towards the end of the air outlet be leeward endpoint, the air duct upper wall it is most short between the air duct lower wall
Range points are air duct upper wall point, and the shortest distance point between the air duct lower wall of the air duct upper wall is air duct lower wall point；
Between the endpoint windward and the line and the air duct upper wall point and air duct lower wall point of the air duct upper wall point
Angle formed by line is angle ω windward1, 30 °≤ω1≤40°；
And/or the line and the air duct upper wall point and air duct lower wall point of the leeward endpoint and the air duct upper wall point
Between line formed by angle be leeward angle ω2, 5 °≤ω2≤25°。
Optionally, the air duct lower wall is equipped with two baffles, and one end of two baffles is respectively adjacent to described in one
Air duct side wall, and extend towards the direction of another air duct side wall.
The utility model also proposes a kind of air conditioner, including air-conditioner outdoor unit and air conditioner indoor unit；
The air conditioner indoor unit includes shell and the cross flow fan that is disposed in the housing, the shell be equipped with air inlet and
Air outlet, the cross flow fan is between the air inlet and air outlet；
The cross flow fan includes spiral case and the wind wheel in the spiral case, and the spiral case includes air duct upper wall, air duct
Lower wall and two air duct side walls, the two air duct side walls are located at the both ends of the air duct lower wall and air duct upper wall length direction, and
Connect the air duct upper wall and the air duct lower wall；
The air duct lower wall be equipped with an at least baffle, the baffle between the wind wheel and the air outlet,
One end of the baffle is adjacent to an air duct side wall, and the other end of the baffle is towards another air duct sidewall direction
Extend.
In technical solutions of the utility model, baffle is additionally arranged in air duct, which is installed on air duct lower wall, and position
Between wind wheel and air outlet, surge concentrates on the two sidewalls in air duct under normal conditions, and further towards between two sidewalls
Region extends, and one end of the baffle is close to air duct side wall, and the other end extends towards the region between two air duct side walls, by wind wheel
The air of discharge is blown out after the guiding of baffle by air outlet, which changes the stream of air-flow between wind wheel and air outlet
Amount and pressure improve outlet air efficiency, reduce the power consumption of air conditioner indoor unit so as to improve surge phenomenon.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the partial structure diagram of one embodiment of the utility model air conditioner indoor unit；
Fig. 2 is the cross-sectional view of the part-structure of one embodiment of the utility model air conditioner indoor unit；
Fig. 3 is the schematic diagram of part-structure in Fig. 2；
Fig. 4 is the schematic diagram of part-structure in Fig. 2.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Air conditioner indoor unit | 53 | Air duct upper wall |
| 10 | Shell | 55 | Air duct lower wall |
| 11 | Air inlet | 57 | Air duct side wall |
| 13 | Air outlet | 70 | Baffle |
| 30 | Evaporator | 71 | Windward side |
| 51 | Wind wheel | 73 | Leeward |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not in the requires of the utility model
Protection scope within.
Air conditioner indoor unit in the utility model embodiment is mainly wall-hanging air conditioner indoor unit, or cabinet air-conditioner
Indoor unit, the utility model are based primarily upon positional relationship of the wall-hanging air conditioner indoor unit after being installed and are described, can be with
Understand ground, when the air conditioner indoor unit is cabinet-type air conditioner, the relative positional relationship of structure meets the restriction of technical scheme, only
It needs to turn in the whole orientation of the limited air conditioner indoor unit 100 of the application, also in the range of the application protects.
The wall-hanging air conditioner indoor unit has use state when being installed, under the use state, the rear side of casing
It is installed on installation carrier by mounting plate, at this point it is possible to which defining the direction perpendicular to the mounting surface is front-rear direction, and is defined
In same level with the perpendicular direction of the front-rear direction be left and right directions, it is generally the case that wall-hanging air conditioner indoor unit
It is maximum in the size on the left and right directions, it is also the length direction of the air conditioner indoor unit.It is to be appreciated that in the wall-mounted sky
When indoor unit being adjusted to have non-working condition, restriction that front-rear direction, up and down direction and left and right directions carry out it is all in accordance with making
It is adjusted correspondingly with state.
Referring to Fig. 1 to Fig. 4, the utility model proposes a kind of air conditioner indoor unit 100.The air conditioner indoor unit 100 includes shell
10 and the cross flow fan in shell 10, shell 10 is equipped with air inlet 11 and air outlet 13, and cross flow fan is located at air inlet 11
Between air outlet 13；
Cross flow fan includes spiral case and the wind wheel 51 in spiral case, spiral case include air duct upper wall 53, air duct lower wall 55 with
And two air duct side walls 57, two air duct side walls 57 are located at the both ends of 53 length direction of air duct lower wall 55 and air duct upper wall, and connect wind
Road upper wall 53 and air duct lower wall 55；
Air duct lower wall 55 is equipped with an at least baffle 70, and baffle 70 is between wind wheel 51 and air outlet 13, baffle
70 one end extends adjacent to an air duct side wall 57, the other end of baffle 70 towards another 57 direction of air duct side wall.
Evaporator 30 is additionally provided in the utility model embodiment, in air duct, evaporator 30 is set to air inlet 11 and wind wheel 51
Between, under the driving of wind wheel 51, air is successively entered by air inlet 11, is blown after evaporator 30 and wind wheel 51 by air outlet 13
Out.
In technical solutions of the utility model, baffle 70 is additionally arranged in air duct, which is installed on air duct lower wall
55, and between wind wheel 51 and air outlet 13, surge concentrates on the two sidewalls in air duct under normal conditions, and further towards two
Region between side wall extends, and one end of the baffle 70 is close to air duct side wall 57, and the other end is towards another 57 side of air duct side wall
To extension, the air being discharged by wind wheel 51 is blown out after the guiding of baffle 70 by air outlet 13, which changes wind
The flow and pressure of air-flow between road side wall 57 and wind wheel 51 and air outlet 13 improve outlet air effect so as to improve surge phenomenon
Rate reduces the power consumption of air conditioner indoor unit 100.
Further, referring to Fig. 3, baffle 70 includes windward side 71, and windward side 71 is located at the baffle 70 close to institute
The side of wind wheel 51 is stated, the windward side 71 is gradually distance from the air duct lower wall by the wind wheel 51 to 13 direction of air outlet
55 directions are obliquely installed.In the embodiment, windward side 71 can may be curved surface for plane, in order to further decrease air inlet wheel
51 to air-flow during air outlet 13 loss, which is preferably curved surface.The air being discharged by wind wheel 51 is in windward side
Local static pressure is converted into dynamic pressure under 71 guiding, effectively adjusts the flow direction of air in the region, so that the flow direction of air is more
Stablize, outlet air consistency is good.
Further, windward side 71 is seamlessly transitted close to the side of air duct lower wall 55 and air duct lower wall 55.Windward side 71
With the smooth transition of air duct lower wall 55, energy loss of the air-flow by air duct lower wall 55 to 71 direction of windward side can be reduced, into one
Step improves the outlet air efficiency of air conditioner indoor unit 100.
Referring to Fig. 3, in an embodiment, the minimum spacing of air duct upper wall 53 and air duct lower wall 55 is H, and windward side 71 is far from wind
The end of road lower wall 55 and the spacing of air duct upper wall 53 are h, and the value range of h is 0.69H≤h≤0.90H.
In the embodiment, the value of h is greater than 0.90H, can be obvious to inhibition surge effect, but in this case by outlet air
The air output decaying of mouth 13 is serious, and the decaying of exponential form can be presented in the variation of attenuation degree and h, and the value of h is less than 0.69H,
Prevent the baffle 70 is not achieved the effect for effectively inhibiting surge, therefore comprehensively considers, knot from effectively rectifying 13 air-flow of air outlet
Specific experiment is closed, the value of h is preferred are as follows: 0.69H≤h≤0.90H, so that the surge phenomenon at air outlet 13 obtains obviously
Ground inhibits, and air output is big, air-out effect is good.
Further, the diameter for defining wind wheel 51 is D0, the value of the minimum spacing H of air duct upper wall 53 and air duct lower wall 55
Range is 0.4D0≤H≤0.6D0。
The exhaust air flue of connection air outlet 13,53 He of air duct upper wall are formed between the air duct upper wall 53 and air duct lower wall 55
The minimum spacing of air duct lower wall 55 is also the minimum spacing of exhaust air flue, and the size of H value determines going out for air conditioner indoor unit 100
Static pressure at air quantity and air outlet 13, if the minimum spacing H of the air duct upper wall 53 and air duct lower wall 55 is less than 0.4D0Meeting so that
Wind-out range reduces, and reduces outlet air efficiency；If the minimum spacing H of the air duct upper wall 53 and air duct lower wall 55 is greater than 0.6D0, then can
So that outlet air strength reduction, air supplying distance are shorter.The minimum spacing H of exhaust air flue is defined in 0.4D0≤H≤0.6D0Range
It is interior, it can guarantee that the wind energy sent out by air outlet 13 maintains certain air supplying distance, and ensure the comfort of room cooling and warming.
With further reference to Fig. 3, baffle 70 further includes the leeward 73 of adjacent windward side 71, and leeward 73 is located at windward side
71 close to the side of air outlet 13, and is obliquely installed by windward side 71 to 13 direction of air outlet close to 55 direction of air duct lower wall.
In the embodiment, the air in air duct flows after the guiding of windward side 71 further towards 13 direction of air outlet
Dynamic, partial air can be flowed along direction defined by leeward 73 during being somebody's turn to do, which is obliquely installed, can be into one
Step reduces the loss of outlet air air-flow.
In the utility model embodiment, the spacing of two air duct side walls 57 is L, and baffle 70 is in an air duct side wall 57 towards another
The development length in one air duct side wall, 57 direction is l, 0.075L≤l≤0.21L.
When the value along length l of the baffle 70 is less than 0.075L, the length of baffle 70 is shorter, improves the effect of surge
Fruit is unobvious, and air conditioner indoor unit 100 in the long-term use still can outlet periodic surge phenomenon；The edge of the baffle 70
The value of length l be greater than 0.21L when, the baffle 70 can to the outlet air of air outlet 13 cause it is biggish block, will lead to air quantity
Decaying is serious, and air conditioner refrigerating heating capacity reduces.Preferably, the value range of l is 0.075L≤l≤0.21L, so that air outlet
Surge phenomenon at 13 is significantly inhibited, and air output is big, air-out effect is good.
In the utility model embodiment, on the cross section of air conditioner indoor unit 100, the end of baffle 70 towards wind wheel 51 is
Endpoint windward, baffle 70 towards the end of air outlet 13 be leeward endpoint, air duct upper wall 53 between air duct lower wall 55
Shortest distance point is 53 points of air duct upper wall, and the shortest distance point between air duct lower wall 55 of air duct upper wall 53 is air duct lower wall 55
Point；
Line institute between the line of endpoint to 53 points of air duct upper wall and 53 points to 55 points of air duct lower wall of air duct upper wall windward
At angle be angle ω windward1, 30 °≤ω1≤40°；
And/or between leeward endpoint and 53 points of air duct upper wall of line and 53 points of air duct upper wall and 55 points of air duct lower wall
Angle formed by line is leeward angle ω2, 5 °≤ω2≤25°。
Referring to fig. 4, it is illustrated as the cross section of air conditioner indoor unit 100, in diagrammatically shown embodiment, is illustrated as in air conditioning chamber
The cross section of machine 100, in diagrammatically shown embodiment, Yu Fengdao lower wall 55 defines point M and point N.Air duct upper wall 53 and wind
Shortest distance point between road lower wall 55 is 53 points of air duct upper wall, i.e. point P；Air duct upper wall 53 between air duct lower wall 55 most
Short distance point is 55 points of air duct lower wall, as point Q.PN line and PQ line are formed by angle between 30 ° to 40 °, and PM connects
Line and PQ line are formed by angle between 5 ° to 25 °.Wind-guiding block is located in the region that point P, point N and point M are enclosed.
Towards the end in air duct be endpoint, as point B windward on baffle 70 on the section, the B point be baffle 70 and
The intersection point of air duct lower wall 55, baffle 70 towards the end of air outlet 13 be wind endpoint, as point C, air duct upper wall 53 and wind
Shortest distance point between road lower wall 55 is 53 points of air duct upper wall, as point A, when the B point on baffle 70 is overlapped with N point, C point
When being overlapped with M point, which has maximum limit of size.In the embodiment, the line of PQ is air duct upper wall 53 and wind
The line of the minimum spacing H, PA of road lower wall 55 are end of the windward side 71 far from air duct lower wall 55 and the air duct upper wall 53
Spacing h.
In above-described embodiment, ω1Value be greater than 40 ° to will lead to entire baffle 70 relatively close apart from wind wheel 51, be easy to draw
Play noise, ω1On the one hand value cannot effectively inhibit surge less than 30 °, another aspect windward side 71 and air duct lower wall 55 it
Between cannot preferably seamlessly transit, can the raw biggish vortex of crossover position in 55 face of air duct lower wall to windward side 71, lead to rapids
Stream noise becomes larger.ω2Less than 5 °, 70 size of baffle is smaller, does not have the good effect for inhibiting surge, ω2It can greater than 25 °
So that being closer apart from air outlet 13 of baffle 70, influences the appearance of air conditioner indoor unit 100.
By ω1And ω2It is defined in 30 °≤ω1≤ 40 ° and 5 °≤ω2≤ 25 °, so that baffle 70 can effectively prevent two wind
Air-flow unevenly generates the phenomenon that flowing back at 57 region of road side wall and air outlet 13, and can prevent the further of recirculation zone
Diffusion effectively inhibits the surge phenomenon during air conditioner long-term work.
In one embodiment, air duct lower wall 55 is equipped with two baffles 70, and one end of two baffles 70 is respectively adjacent to an air duct side
Wall 57, and extend towards the direction of another air duct side wall 57.In the embodiment, baffle 70 can be to the gas at two air duct side walls 57
Stream non-uniform phenomenon is rectified, and the surge phenomenon during air conditioner long-term work is further effectively inhibited.
The utility model also proposes a kind of air conditioner, which includes air-conditioner outdoor unit and air conditioner indoor unit 100, the sky
Adjust the specific structure of indoor unit 100 referring to above-described embodiment, since this air conditioner uses whole skills of above-mentioned all embodiments
Art scheme, therefore at least all beneficial effects brought by the technical solution with above-described embodiment, this is no longer going to repeat them.
The foregoing is merely the alternative embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of air conditioner indoor unit, which is characterized in that including shell and the cross flow fan being disposed in the housing, the shell is set
There are air inlet and air outlet, the cross flow fan is between the air inlet and air outlet；
The cross flow fan includes spiral case and the wind wheel in the spiral case, and the spiral case includes air duct upper wall, air duct lower wall
And two air duct side walls, the two air duct side walls are located at the both ends of the air duct lower wall and air duct upper wall length direction, and connect
The air duct upper wall and the air duct lower wall；
The air duct lower wall is equipped with an at least baffle, and the baffle is described between the wind wheel and the air outlet
Prolong adjacent to an air duct side wall, the other end of the baffle towards another air duct sidewall direction one end of baffle
It stretches.
2. air conditioner indoor unit as described in claim 1, which is characterized in that the baffle includes windward side, the windward side
Positioned at the baffle towards the side of the wind wheel, the windward side is gradually distance from by the wind wheel to the direction of air outlet
Air duct lower wall direction is obliquely installed.
3. air conditioner indoor unit as claimed in claim 2, which is characterized in that the windward side is close to the side of the air duct lower wall
It is seamlessly transitted with the air duct lower wall.
4. air conditioner indoor unit as claimed in claim 2, which is characterized in that the minimum of the air duct upper wall and the air duct lower wall
Spacing is H, and the spacing of end of the windward side far from the air duct lower wall and the air duct upper wall is h, and the value range of h is
0.69H≤h≤0.90H。
5. air conditioner indoor unit as claimed in claim 4, which is characterized in that the diameter of the wind wheel is D0, the air duct upper wall and
The value range of the minimum spacing H of the air duct lower wall is 0.4D0≤H≤0.6D0。
6. air conditioner indoor unit as claimed in claim 2, which is characterized in that the baffle further includes the adjacent windward side
Leeward, the leeward are located at the windward side close to the side of the air outlet, and by the windward side to the outlet air
Direction is obliquely installed close to air duct lower wall direction.
7. air conditioner indoor unit as described in claim 1, which is characterized in that the spacing of the two air duct side walls is L, the water conservancy diversion
Block is l, 0.075L≤l≤0.21L in the development length of an air duct side wall towards another air duct sidewall direction.
8. air conditioner indoor unit as claimed in any of claims 1 to 7 in one of claims, which is characterized in that the cross of the air conditioner indoor unit
On section, the baffle is that endpoint, the baffle are to carry on the back towards the end of the air outlet windward towards the end of wind wheel
Wind endpoint, the shortest distance point between the air duct lower wall of the air duct upper wall are air duct upper wall point, the air duct upper wall
The shortest distance point between the air duct lower wall be air duct lower wall point；
Line between the endpoint windward and the line and the air duct upper wall point and air duct lower wall point of the air duct upper wall point
Formed angle is angle ω windward1, 30 °≤ω1≤40°；
And/or between the leeward endpoint and the line and the air duct upper wall point and air duct lower wall point of the air duct upper wall point
Line formed by angle be leeward angle ω2, 5 °≤ω2≤25°。
9. air conditioner indoor unit as claimed in any of claims 1 to 7 in one of claims, which is characterized in that the air duct lower wall is equipped with two
The baffle, one end of two baffles are respectively adjacent to an air duct side wall, and towards another air duct side wall
Direction extends.
10. a kind of air conditioner, which is characterized in that including air-conditioner outdoor unit and empty as in one of claimed in any of claims 1 to 9
Adjust indoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968782.8U CN209131007U (en) | 2018-11-27 | 2018-11-27 | Air conditioner indoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968782.8U CN209131007U (en) | 2018-11-27 | 2018-11-27 | Air conditioner indoor unit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209131007U true CN209131007U (en) | 2019-07-19 |
Family
ID=67247013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821968782.8U Active CN209131007U (en) | 2018-11-27 | 2018-11-27 | Air conditioner indoor unit and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209131007U (en) |
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2018
- 2018-11-27 CN CN201821968782.8U patent/CN209131007U/en active Active
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