CN202732467U - Air conditioner, axial flow fan and axial flow fan blade thereof - Google Patents
Air conditioner, axial flow fan and axial flow fan blade thereof Download PDFInfo
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- CN202732467U CN202732467U CN 201220314310 CN201220314310U CN202732467U CN 202732467 U CN202732467 U CN 202732467U CN 201220314310 CN201220314310 CN 201220314310 CN 201220314310 U CN201220314310 U CN 201220314310U CN 202732467 U CN202732467 U CN 202732467U
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Abstract
The utility model provides an axial flow fan blade. The axial flow fan blade comprises a hub and blades, wherein the tail edge of each blade bends to the front edge of the blade in a manner of being vertical to a projection contour line of a hub axis plane and comprises a first curve ab and a second curve bc, the intersection point b of the first curve ab and the second curve bc is the farthest point away from a connecting line ac, the connecting line ac is a connecting line of a first endpoint a and a second endpoint c, the diameter of a setting circle, which takes the center of the hub as a circle center o and passes through any point on the projection contour line, is d, the arc length, intercepted by the connecting line ac and the first curve ab or second curve bc, of the setting circle is sunk depth sigma, the sunk depth sigma of points on the first curve ab increases with the increase of the d, the sunk depth sigma of points on the second curve bc decreases with the increase of the d, and epsilon is equal to sigma/d and is not less than 0 and not more than 0.2. The role of improving the airflow flow of the tail edges of the blades can be achieved in the variation range, so that the air supplying noise of the axial flow fan blade is reduced, the resistance to the blades caused by airflow is reduced, and the power consumption of an axial flow fan is reduced. The utility model further provides the axial flow fan and an air conditioner which are provided with the axial flow fan blade.
Description
Technical field
The utility model relates to air conditioner technical field, particularly a kind of air-conditioning, axial-flow blower and axial-flow leaf thereof.
Background technique
Along with the development of economic construction, air-conditioning technical has also been obtained significant progress.Air conditioner outdoor machine adopts axial-flow blower to dispel the heat mostly, and axial-flow blower relies on its turning effort at a high speed as the vitals of air-conditioning, makes gas directional flow under the blade effect, produces thermolysis.
Please refer to Fig. 1, Fig. 1 is a kind of structural representation of axial-flow leaf of the prior art.
At present, its basic structure comprise wheel hub and equidistantly or unequal-interval be arranged on two or more blade 02 on the wheel hub 01.And the blade trailing edge of the blade 02 of axial-flow leaf mostly is greatly concordant shape, protrudes shape or large concave shape, and when work, the blade 02 of this class blade trailing edge is because of high speed rotating and air-flow generation vibration, thereby produce larger noise, simultaneously, because the effect of air current flow produces certain resistance to blade rotation, increase the power consumption that blade 02 rotates, thereby so that axial-flow blower needs higher rotative power to satisfy the demand of air output and heat radiation.
Therefore, reduce power consumption when how to reduce noise, become those skilled in the art's important technological problems to be solved.
The model utility content
In view of this, the utility model provides a kind of axial-flow leaf, reduces power consumption in the time of with the reduction noise.The utility model also provides a kind of axial fan and air-conditioning with above-mentioned axial-flow leaf.
For achieving the above object, the utility model provides following technological scheme:
A kind of axial-flow leaf, comprise wheel hub and the blade that is connected with described wheel hub, projected outline's alignment blade inlet edge perpendicular to the plane of described hub axis of the blade trailing edge of described blade is crooked, described contour projection comprises near the first curve ab of described wheel hub with away from the second curve bc of described wheel hub, the intersection point b of described the first curve ab and described the second curve bc is apart from connecting line ac point farthest, connecting line ac is the line of the second end points c of the first end points a of described the first curve ab and described the second curve bc, take the center of described wheel hub as the location diameter of a circle of center of circle o any point on contour projection as d, described setting circle is cup depth δ by the arc length of described connecting line ac and described the first curve ab or described the second curve bc intercepting, the cup depth δ of the setting circle of the point on described the first curve ab increases with d, the cup depth δ of the setting circle of the point on described the second curve bc increases with d and reduces, ε=δ/d, 0≤ε≤0.2.
Preferably, the contour projection of described blade trailing edge also comprises the 3rd connecting line cd that is connected with described the second curve bc, and described the 3rd connecting line cd is the intersection point projection of described blade trailing edge and blade outer rim away from the 3rd end points d of described the second curve bc.
Preferably, the contour projection of described blade trailing edge also comprises the 4th connecting line ae that is connected with described the first curve ab, and described the 4th connecting line ae is the intersection point projection of described blade trailing edge and root of blade away from the 4th end points e of described the first curve ab.
Preferably, the second straightway L of described the second end points c and the 3rd end points d
2Length greater than the first straightway L of described the first end points a and described the 4th end points e
1Length.
Preferably, the upper any point of described the first curve ab is positioned at equation y=2 * 10
-6x
5+ 2 * 10
-3x
4+ 0.669x
3+ 112.9x
2+ 9498.2x+318657 or y=2 * 10
-5x
4+ 0.0135x
3+ 3.4042x
2On the first equation curve that+377.99x+15634 consists of; Wherein said the first end points a and the first equation Curves the line of rectangular coordinate system initial point and the y axle clamp angle of this rectangular coordinate system be 36 °.
Preferably, the upper any point of described the second curve bc and described the 3rd connecting line cd is positioned at equation y=-4 * 10
-6x
3+ 4 * 10
-5x
2+ 0.0286x+71.308 or y=1.2 * 10
-3x
2On the second equation curve that+0.1354x+74.381 consists of.
Preferably, described center of circle o and described intersection point b be connected straight line ob line be connected center of circle o and described the first end points a the angle that is connected straight line oa line less than described oa line be connected the angle that be connected straight line od line of center of circle o with described the 3rd end points d, the angle that is connected straight line oc line and described oa line of described center of circle o and described the second end points c is less than the angle of described oa line and described od line.
Preferably, described blade is at least 2.
The utility model also provides a kind of axial-flow blower, comprises axial-flow leaf, and described axial-flow leaf is each described axial-flow leaf of such scheme.
The utility model also provides a kind of air-conditioning, comprises axial-flow blower, and described axial-flow blower is the described axial-flow blower of such scheme.
Can find out from above-mentioned technological scheme, the axial-flow leaf that the utility model provides, comprise wheel hub and the blade that is connected with wheel hub, projected outline's alignment blade inlet edge perpendicular to the plane of hub axis of the blade trailing edge of blade is crooked, contour projection comprises near the first curve ab of wheel hub with away from the second curve bc of wheel hub, the intersection point b of the first curve ab and the second curve bc is apart from connecting line ac point farthest, connecting line ac is the line of the second end points c of the first end points a of the first curve ab and the second curve bc, take the center of wheel hub as the location diameter of a circle of center of circle o any point on contour projection as d, the arc length that setting circle is connected line ac and the first curve ab or the second curve bc intercepting is cup depth δ, the cup depth δ of the setting circle of the point on the first curve ab increases with d, the cup depth δ of the setting circle of the point on the second curve bc increases with d and reduces, ε=δ/d, 0≤ε≤0.2.Because the first curve ab and the second curve bc of the contour projection of the blade trailing edge that the utility model provides are the curve of variable curvature, and in its excursion, can satisfy the effect of the air current flow of improving blade trailing edge, reduce air-flow blade is produced vibration, thereby reduce the air-supply noise of axial-flow leaf, alleviate air-flow to the resistance of blade, reduce the power consumption of axial-flow blower.
Simultaneously, compare with the axial-flow leaf of existing concordant shape and protrusion shape blade trailing edge, the axial-flow leaf that the utility model provides has alleviated the weight of axial-flow leaf, thereby has reduced the cost of production of axial-flow leaf; Compare with the axial-flow leaf of existing large concave shape blade trailing edge, in the contour projection of the blade trailing edge of the axial-flow leaf that the utility model provides, cup depth δ on the first curve ab increases with the diameter d of setting circle, cup depth δ on the second curve bc reduces with the diameter d increase of setting circle, and ε=δ/d, the condition that depression slowly changes is satisfied in 0≤ε≤0.2, effectively increase blade strength, thereby increased the working life of axial-flow leaf.
The utility model also provides a kind of axial-flow blower and air-conditioning with above-mentioned axial-flow leaf, because above-mentioned axial-flow leaf has above-mentioned technique effect, axial-flow blower and air-conditioning with this axial-flow leaf also should have corresponding technique effect, introduce no longer one by one at this.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of structural representation of axial-flow leaf of the prior art;
The structural representation of the axial-flow leaf that Fig. 2 provides for the utility model embodiment;
The structural representation of the blade of the axial-flow leaf that Fig. 3 provides for the utility model embodiment;
The right angled coordinates schematic representation of the blade of the axial-flow leaf that Fig. 4 provides for the utility model embodiment.
Embodiment
The utility model discloses a kind of axial-flow leaf, reduce power consumption in the time of with the reduction noise.The utility model also provides a kind of axial fan and air-conditioning with above-mentioned axial-flow leaf.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 2-Fig. 4, the structural representation of the first axial-flow leaf that Fig. 2 provides for the utility model embodiment; The structural representation of the blade of the axial-flow leaf that Fig. 3 provides for the utility model embodiment; The right angled coordinates schematic representation of the blade of the axial-flow leaf that Fig. 4 provides for the utility model embodiment.
The utility model embodiment provides a kind of axial-flow leaf, comprise wheel hub 1 and the blade 2 that is connected with wheel hub 1, it is characterized in that, projected outline's alignment blade inlet edge perpendicular to the plane of wheel hub 1 axis of the blade trailing edge of blade 2 is crooked, contour projection comprises near the first curve ab of wheel hub 1 with away from the second curve bc of wheel hub 1, the intersection point b of the first curve ab and the second curve bc is apart from connecting line ac point farthest, connecting line ac is the line of the second end points c of the first end points a of the first curve ab and the second curve bc, take the center of wheel hub 1 as the location diameter of a circle of center of circle o any point on contour projection as d, the arc length that setting circle is connected line ac and the first curve ab or the second curve bc intercepting is cup depth δ, the cup depth δ of the setting circle of the point on the first curve ab increases with d, the cup depth δ of the setting circle of the point on the second curve bc increases with d and reduces, ε=δ/d, 0≤ε≤0.2.
Need to prove that blade inlet edge is the windward side edge of blade 2, blade trailing edge is the edge that is oppositely arranged with blade inlet edge on the blade 2, and the blade outer rim is the edge away from wheel hub 1, and root of blade is the blade-section with wheel hub 1 joint.And blade trailing edge is connected with blade outer rim and root of blade, and wherein, root of blade is connected with wheel hub, and the blade outer rim is the blade free end.
The axial-flow leaf that the utility model embodiment provides, comprise wheel hub 1 and the blade 2 that is connected with wheel hub 1, the contour projection perpendicular to the plane of wheel hub 1 axis of the blade trailing edge of blade 2 comprises near the first curve ab of wheel hub 1 with away from the second curve bc of wheel hub 1, the intersection point b of the first curve ab and the second curve bc is apart from connecting line ac point farthest, connecting line ac is the line of the second end points c of the first end points a of the first curve ab and the second curve bc, take the center of wheel hub 1 as the location diameter of a circle of center of circle o any point on contour projection as d, the arc length that setting circle is connected line ac and the first curve ab or the second curve bc intercepting is cup depth δ, the cup depth δ of the setting circle of the point on the first curve ab increases with d, the cup depth δ of the setting circle of the point on the second curve bc increases with d and reduces, ε=δ/d, 0≤ε≤0.2.Because the first curve ab and the second curve bc of the contour projection of the blade trailing edge that the utility model provides are the curve of variable curvature, and in its excursion, can satisfy the effect of the air current flow of improving blade trailing edge, reduce air-flow blade is produced vibration, thereby reduce the air-supply noise of axial-flow leaf, alleviate air-flow to the resistance of blade, reduce the power consumption of axial-flow blower.
The axial-flow leaf and the axial-flow leaf of the prior art effect relatively that provide in order to get more information about the utility model embodiment please refer to the following table content.
Table 1 contrasts with the test data of experiment of prior art axial-flow leaf
By above-mentioned laboratory data as can be known, blade provided in the present embodiment, compare with blade of the prior art: in the situation of equal air quantity, its power demand can further reduce, and the noise of formation also can further be reduced; In the situation of Same Efficieney, its air quantity that can form can further improve, and the noise of formation also can further be reduced.
Simultaneously, compare with the axial-flow leaf of existing concordant shape and protrusion shape blade trailing edge, the axial-flow leaf that the utility model provides has alleviated the weight of axial-flow leaf, thereby has reduced the cost of production of axial-flow leaf; Compare with the axial-flow leaf of existing large concave shape blade trailing edge, in the contour projection of the blade trailing edge of the axial-flow leaf that the utility model provides, cup depth δ on the first curve ab increases with the diameter d of setting circle, cup depth δ on the second curve bc reduces with the diameter d increase of setting circle, and ε=δ/d, the condition that depression slowly changes is satisfied in 0≤ε≤0.2, effectively increase blade strength, thereby increased the working life of axial-flow leaf.
In the present embodiment, the contour projection of blade trailing edge also comprises the 3rd connecting line cd that is connected with the second curve bc, and the 3rd connecting line cd is the intersection point projection of blade trailing edge and blade outer rim away from the 3rd end points d of the second curve bc.By the setting of the 3rd connecting line cd, avoided the interior bending of the second curve bc to slacken the intensity of blade 2, strengthened the stability of blade trailing edge to the blade outer rim, further improved blade 2 intensity.Also can make projected outline comprise many connecting lines that link to each other successively according to specific requirement, and many connecting lines one end that links to each other is connected with the second curve bc, the other end be the intersection point projection of blade trailing edge and blade outer rim, larger enhancing blade 2 intensity.Present embodiment only makes projected outline comprise a connecting line that is connected with the second curve bc, i.e. the 3rd connecting line cd for easy to process.
In like manner, the contour projection of blade trailing edge also comprises the 4th connecting line ae that is connected with the first curve ab, and the 4th connecting line ae is the intersection point projection of blade trailing edge and root of blade away from the 4th end points e of the first curve ab.To strengthen the join strength of blade 2 and wheel hub 1.
In above-described embodiment, the intersection point of blade trailing edge and blade outer rim be projected as blade trailing edge and blade outer rim intersection point in the projection perpendicular to the plane of wheel hub 1 axis; The intersection point that the intersection point of blade trailing edge and root of blade is projected as blade trailing edge and root of blade is in the projection perpendicular to the plane of wheel hub 1 axis.
As shown in Figure 3, the second straightway L of the second end points c and the 3rd end points d
2Length greater than the first straightway L of the first end points a and the 4th end points e
1Length.By will be away from the second straightway L of wheel hub 1
2Design of length be greater than near the first straightway L of wheel hub 1
1The structure of length so that the area that the outside of the axial-flow leaf that the utility model embodiment provides contacts with air-flow is larger, further improved the air quantity that is blown out by axial-flow leaf.
Preferably, the upper any point of the first curve ab of the axial-flow leaf that provides of the utility model embodiment is positioned at equation y=2 * 10
-6x
5+ 2 * 10
-3x
4+ 0.669x
3+ 112.9x
2+ 9498.2x+318657 or y=2 * 10
-5x
4+ 0.0135x
3+ 3.4042x
2On the first equation curve that+377.99x+15634 consists of; Wherein the first end points a and the first equation Curves the line of rectangular coordinate system initial point and the y axle clamp angle of this rectangular coordinate system be 36 °.And the upper any point of the second curve bc and the 3rd connecting line cd is positioned at equation y=-4 * 10
-6x
3+ 4 * 10
-5x
2+ 0.0286x+71.308 or y=1.2 * 10
-3x
2On the second equation curve that+0.1354x+74.381 consists of.Also can specifically above-mentioned equation coefficient be replaced with other and satisfy other forms of above-mentioned condition and guarantee that above-mentioned equation exponent number in 2 ~ 10 scope, all can reach this effect, and all in protection domain.
As shown in Figure 4, the axial-flow leaf that preferably present embodiment is provided is designed to the angle theta b that is connected straight line oa line that is connected straight line ob line and center of circle o and the first end points a of center of circle o and intersection point b less than oa line and the angle theta d that be connected straight line od line of center of circle o with the 3rd end points d, and the angle theta c that is connected straight line oc line and oa line of center of circle o and the second end points c is less than the angle theta d of oa line and od line.
In the axial-flow leaf that the utility model embodiment provides, blade 2 is at least 2.Preferably blade 2 evenly is arranged on the wheel hub 1.Also can change angle between each blade 2 according to actual requirement, make its inhomogeneous being arranged on the wheel hub 1, and all within protection domain, this tired stating no longer one by one.
The utility model embodiment also provides a kind of axial-flow blower, comprises axial-flow leaf, and axial-flow leaf is any axial-flow leaf of above-described embodiment.
The utility model embodiment also provides a kind of air-conditioning, comprises axial-flow blower, and axial-flow blower is the axial-flow blower of above-described embodiment.
The axial-flow blower with above-mentioned axial-flow leaf and air-conditioning that the utility model embodiment provides, because above-mentioned axial-flow leaf has above-mentioned technique effect, axial-flow blower and air-conditioning with this axial-flow leaf also should have corresponding technique effect, introduce no longer one by one at this.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. axial-flow leaf, comprise wheel hub (1) and the blade (2) that is connected with described wheel hub (1), it is characterized in that, projected outline's alignment blade inlet edge perpendicular to the plane of described wheel hub (1) axis of the blade trailing edge of described blade (2) is crooked, described contour projection comprises near the first curve ab of described wheel hub (1) with away from the second curve bc of described wheel hub (1), the intersection point b of described the first curve ab and described the second curve bc is apart from connecting line ac point farthest, connecting line ac is the line of the second end points c of the first end points a of described the first curve ab and described the second curve bc, take the center of described wheel hub (1) as the location diameter of a circle of center of circle o any point on contour projection as d, described setting circle is cup depth δ by the arc length of described connecting line ac and described the first curve ab or described the second curve bc intercepting, the cup depth δ of the setting circle of the point on described the first curve ab increases with d, the cup depth δ of the setting circle of the point on described the second curve bc increases with d and reduces, ε=δ/d, 0≤ε≤0.2.
2. axial-flow leaf as claimed in claim 1, it is characterized in that, the contour projection of described blade trailing edge also comprises the 3rd connecting line cd that is connected with described the second curve bc, and described the 3rd connecting line cd is the intersection point projection of described blade trailing edge and blade outer rim away from the 3rd end points d of described the second curve bc.
3. axial-flow leaf as claimed in claim 2, it is characterized in that, the contour projection of described blade trailing edge also comprises the 4th connecting line ae that is connected with described the first curve ab, and described the 4th connecting line ae is the intersection point projection of described blade trailing edge and root of blade away from the 4th end points e of described the first curve ab.
4. axial-flow leaf as claimed in claim 3 is characterized in that, the second straightway L of described the second end points c and the 3rd end points d
2Length greater than the first straightway L of described the first end points a and described the 4th end points e
1Length.
5. axial-flow leaf as claimed in claim 2 is characterized in that, the upper any point of described the first curve ab is positioned at equation y=2 * 10
-6x
5+ 2 * 10
-3x
4+ 0.669x
3+ 112.9x
2+ 9498.2x+318657 or y=2 * 10
-5x
4+ 0.0135x
3+ 3.4042x
2On the first equation curve that+377.99x+15634 consists of; Wherein said the first end points a and the first equation Curves the line of rectangular coordinate system initial point and the y axle clamp angle of this rectangular coordinate system be 36 °.
6. axial-flow leaf as claimed in claim 5 is characterized in that, the upper any point of described the second curve bc and described the 3rd connecting line cd is positioned at equation y=-4 * 10
-6x
3+ 4 * 10
-5x
2+ 0.0286x+71.308 or y=1.2 * 10
-3x
2On the second equation curve that+0.1354x+74.381 consists of.
7. axial-flow leaf as claimed in claim 1, it is characterized in that, described center of circle o and described intersection point b be connected straight line ob line be connected center of circle o and described the first end points a the angle that is connected straight line oa line less than described oa line be connected the angle that be connected straight line od line of center of circle o with described the 3rd end points d, the angle that is connected straight line oc line and described oa line of described center of circle o and described the second end points c is less than the angle of described oa line and described od line.
8. such as each described axial-flow leaf of claim 1-7, it is characterized in that described blade (2) is at least 2.
9. an axial-flow blower comprises axial-flow leaf, it is characterized in that, described axial-flow leaf is such as each described axial-flow leaf of claim 1-8.
10. an air-conditioning comprises axial-flow blower, it is characterized in that, described axial-flow blower is axial-flow blower as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314310 CN202732467U (en) | 2012-06-29 | 2012-06-29 | Air conditioner, axial flow fan and axial flow fan blade thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314310 CN202732467U (en) | 2012-06-29 | 2012-06-29 | Air conditioner, axial flow fan and axial flow fan blade thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732467U true CN202732467U (en) | 2013-02-13 |
Family
ID=47658171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220314310 Expired - Lifetime CN202732467U (en) | 2012-06-29 | 2012-06-29 | Air conditioner, axial flow fan and axial flow fan blade thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732467U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511339A (en) * | 2012-06-29 | 2014-01-15 | 珠海格力电器股份有限公司 | Air conditioner, axial flow fan and axial propeller of axial flow fan |
| CN104655054A (en) * | 2013-11-20 | 2015-05-27 | 格力电器（合肥）有限公司 | Cross flow fan dislocation angle measurement method and measurement device thereof |
| WO2021017153A1 (en) * | 2019-07-31 | 2021-02-04 | 广东美的制冷设备有限公司 | Axial-flow fan blade, axial-flow fan, and air conditioner |
-
2012
- 2012-06-29 CN CN 201220314310 patent/CN202732467U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511339A (en) * | 2012-06-29 | 2014-01-15 | 珠海格力电器股份有限公司 | Air conditioner, axial flow fan and axial propeller of axial flow fan |
| CN103511339B (en) * | 2012-06-29 | 2016-02-03 | 珠海格力电器股份有限公司 | Air-conditioning, axial-flow blower and axial-flow leaf thereof |
| CN104655054A (en) * | 2013-11-20 | 2015-05-27 | 格力电器（合肥）有限公司 | Cross flow fan dislocation angle measurement method and measurement device thereof |
| CN104655054B (en) * | 2013-11-20 | 2017-09-29 | 格力电器（合肥）有限公司 | A kind of through-flow fan blade dislocation angle measuring method and its measurement apparatus |
| WO2021017153A1 (en) * | 2019-07-31 | 2021-02-04 | 广东美的制冷设备有限公司 | Axial-flow fan blade, axial-flow fan, and air conditioner |
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Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |