CN103256582A - Gas heat convection heat dissipating structure of LED bulb - Google Patents
Gas heat convection heat dissipating structure of LED bulb Download PDFInfo
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- CN103256582A CN103256582A CN2013101915183A CN201310191518A CN103256582A CN 103256582 A CN103256582 A CN 103256582A CN 2013101915183 A CN2013101915183 A CN 2013101915183A CN 201310191518 A CN201310191518 A CN 201310191518A CN 103256582 A CN103256582 A CN 103256582A
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- radiator
- lampshade
- cover
- led bulb
- shell
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- 238000009423 ventilation Methods 0.000 claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to a gas heat convection heat dissipating structure of an LED bulb. The gas heat convection heat dissipating structure of the LED bulb comprises a radiator, an insulating connecting sleeve, a shade preventing sleeve, a lampshade and a lampshade top cover. A cavity and cooling fins are arranged in the radiator and a plurality of ventilated channels are formed in the radiator. An LED lamp panel is installed on the outer wall of a cavity body of the radiator. Gaps for cavity ventilation are arranged between the radiator and the insulating connecting sleeve, between the radiator and the lampshade, between the lampshade and the lampshade top cover and between the lampshade top cover and the shadow preventing sleeve. The gas heat convection heat dissipating structure of the LED bulb has the advantages that the structure of inner air ducts is added to a heat dissipating device of a product, so that air flow with the specific flow direction is generated inside the LED bulb, and the process of heat dissipation is accelerated; whole heat dissipating effect of the product is effectively improved, the appearance of the product maintains the shape of an ordinary bulb, so that the LED bulb is used for replacing a traditional bulb, popularization of the efficient lighting product is achieved, and energy is saved in wide application fields.
Description
Technical field
The invention belongs to LED lamp electrical lighting field, relate in particular to the gas thermal convection current radiator structure of LED bulb.
Background technology
In the LED lighting technical field, the temperature of product when operation LED lamp pearl is to influence the product most critical factor in service life---LED lamp pearl temperature drift, and product will shorten service life; Otherwise then product will effectively be continued service life in the reasonable scope.Therefore, the heat dispersion of product is the sport technique segment of LED illuminating product most critical; Appearance at the LED bulb all is provided with lampshade, so that the light of LED lamp is evenly soft, but the existence of lampshade can influence the radiating effect of LED bulb; Usually the LED illuminating product is to take the mode of atural beat diffusion to dispel the heat, and is about to heat and conducts to product thermal component outer surface, because having the temperature difference between thermal component and air, makes heat slowly diffuse in the air by thermal component; Corresponding LED bulb, this radiating mode exists radiating efficiency low, the defective of radiating effect difference.
Summary of the invention
The objective of the invention is to propose a kind of technical scheme of gas thermal convection current radiator structure of LED bulb.
To achieve these goals, technical scheme of the present invention is: the gas thermal convection current radiator structure of LED bulb, comprise LED lamp plate, radiator and insulation adapter sleeve, illumination LED lamp pearl is installed on the LED lamp plate, the LED lamp plate is installed on the radiator sidewall, and the radiator lower end connects the insulation adapter sleeve, and the insulation adapter sleeve connects bulb the spiral shell head is installed, fixedly there is anti-shade cover the radiator upper end, and a top cover snaps in the outside that anti-shade cover is fixed on lampshade the LED lamp plate; It is characterized in that, described radiator is the open tubular structure heat-dissipating cavity in upper end, radiator inwall around tubular structure is provided with fin, fin vertically arranges first ventilating duct that forms up/down perforation along inwall, described LED lamp plate is close to installation around tubular structure radiator lateral wall, the lower end of described radiator is connected with shell and the interior cover of mutual sheathing, the upper/lower terminal of described shell opens wide, and is vertically arranged with dowel and forms second ventilating duct that air is circulated at above-below direction between shell and interior cover; Described interior being sleeved on the described insulation adapter sleeve is connected radiator on the insulation adapter sleeve, and the radiator lower end edge is provided with through hole with shell with the position that interior cover is connected, and described through hole is communicated with first ventilating duct and second ventilating duct; Described shell upper port with at the bottom of the lampshade along being connected, the joining place on edge is provided with the gap notch at the bottom of described shell and lampshade, the clearance groove interruption-forming second ventilating duct upper port air access way, between the shell of the bottom of second ventilating duct and insulation adapter sleeve, be provided with another gap notch, another clearance groove interruption-forming second ventilating duct lower port air access way; The central authorities of lampshade upper end are provided with perforate, and top cover is fixed on lampshade by perforate the outside of LED lamp plate; The inner chamber of described anti-shade cover is communicated with first ventilating duct; Sidewall is provided with ventilation gap between top cover and anti-shade cover, and described ventilation gap is the air access way of first passage.
Further, described first ventilating duct is up-small and down-big taper tubular structure ventilation and heat cavity, and described second channel is up big and down small loop vent heat dissipation channel.
Further, described taper tubular is that cross section is rectangle or polygonal multiaspect shape taper tubular.
Further, the tapering of described taper is that 5 degree are to 7 degree.
Further, the lampshade loam cake that described lampshade comprises the lampshade lower cover and interlocks with it, the bottom of described lampshade lower cover is provided with the convex edge, and the lampshade lower cover is crimped on the top of described radiator shell by a lampshade pressing plate, and described lampshade pressing plate is fixed on by screw on the dowel of bottom of radiator; Described lampshade pressing plate is sleeved on the outer wall on described radiator top, and the middle part of the lampshade pressing plate described through hole that makes radiator that raises up is communicated with described second ventilating duct.
Further, described lampshade lower cover and lampshade loam cake are by ultrasonic fusing, and described lampshade lower cover, lampshade loam cake and radiator lower case constitute the bulb profile of a water droplet shape.
Further, described radiator also is fixed on the described insulation adapter sleeve by draw-in groove, and the material of described radiator is the ADC12 aluminium alloy.
Further, described anti-shade cover is that material is the transparent body of Merlon, and described anti-shade cover is fixed on the upper end of described radiator by draw-in groove.
Further, described top cover is fixed on described anti-shade by draw-in groove and puts.
Further, the material of described lampshade, top cover is Merlon.
The invention has the beneficial effects as follows: in the product heat abstractor, increased inner air channel structure, made LED bulb inside produce the air-flow of the specific flow direction, thereby accelerated the process of thermal diffusion; On the basis that has kept product thermal component outer surface atural beat diffusion function, increased the directed heat loss through convection function of product thermal component inner air, therefore improved product integral heat sink effect effectively, and make product design keep the shape of common bulb, be beneficial to use LED bulb replace traditional bulbs, realize popularizing of efficient illumination product, in application energy efficient widely.
Below in conjunction with drawings and Examples the present invention is made a detailed description.
Description of drawings
Fig. 1 is the gas thermal convection current radiator structure schematic diagram of LED bulb of the present invention;
Fig. 2 is the gas thermal convection current radiator structure profile view of LED bulb of the present invention;
Fig. 3 is the interior views of the actual example of the present invention;
Fig. 4 is embodiment of the invention radiator part-structure decomposing schematic representation;
Fig. 5 is that a kind of use state of the present invention downstream is moved towards schematic diagram;
Fig. 6 is that the another kind of use state of the present invention downstream is moved towards schematic diagram.
The specific embodiment
Designing requirement for the radiator structure of LED bulb is: the radiating effect of realizing the best on the basis that keeps the common bulb profile and do not influence the light source irradiation; To achieve these goals, the present invention adopts following scheme:
The gas thermal convection current radiator structure of LED bulb, extremely shown in Figure 6 as Fig. 1, comprise LED lamp plate 70, radiator 14 and insulation adapter sleeve 20, illumination LED lamp pearl 71 is installed on the LED lamp plate, the LED lamp plate is installed on the radiator sidewall, and the radiator lower end connects the insulation adapter sleeve, and the insulation adapter sleeve connects bulb the spiral shell head is installed, the radiator upper end fixedly has 30, one top covers 50 of anti-shade cover to snap in the outside that anti-shade cover is fixed on lampshade 40 the LED lamp plate; Wherein, described radiator is the open tubular structure heat-dissipating cavity in upper end, radiator inwall around tubular structure is provided with fin 15, fin vertically arranges first ventilating duct that forms up/down perforation along inwall, described LED lamp plate is close to installation around tubular structure radiator lateral wall, it is close to by installing hole 17 and screw and is fixed on the radiator lateral wall, the lower end of described radiator is connected with the shell 11 of mutual sheathing and the base radiator 10 that interior cover 12 forms, on the described shell, following both ends open is vertically arranged with dowel 13 and forms second ventilating duct that air is circulated at above-below direction between shell and interior cover; Described interior being sleeved on the described insulation adapter sleeve is connected radiator on the insulation adapter sleeve, and the radiator lower end edge is provided with through hole 16 with the position that shell is connected with interior cover, and described through hole is communicated with first ventilating duct and second ventilating duct; Described shell upper port with at the bottom of the lampshade along being connected, the joining place on edge is provided with gap notch 3 at the bottom of described shell and lampshade, the clearance groove interruption-forming second ventilating duct upper port air access way, between the shell of the bottom of second ventilating duct and insulation adapter sleeve, be provided with another gap notch 22, another clearance groove interruption-forming second ventilating duct lower port air access way; The central authorities of lampshade upper end are provided with the top cover perforate; Described lampshade top cover is installed in described anti-shade and puts, and described anti-shade cover is that material is the transparent body of Merlon (PC), and the inner chamber of anti-shade cover is communicated with first ventilating duct; Sidewall is provided with ventilation gap 52 between lampshade top cover and anti-shade cover, and described ventilation gap is the air access way of first passage, and the upper surface of lampshade top cover is arranged in the described top cover perforate of lampshade loam cake.
In order to increase the ventilation effect of ventilating duct, among the embodiment, described first ventilating duct is up-small and down-big taper tubular structure ventilation and heat cavity, and described second channel is up big and down small loop vent heat dissipation channel.Two ventilating ducts are interconnected at Da Kouchu, make no matter the LED bulb is upright use or stands upside down and use, its passage on top is always up-small and down-big owing to opening, when inside has heat to produce, a kind of effect of pulling out wind is always arranged, promoted heat exchange, reduced the temperature in the lampshade, one of them preferred version is that the tapering of described taper is that 5 degree are to 7 degree.
Among the embodiment, for the ease of layout and the installation of LED lamp plate, described taper tubular is that cross section is rectangle or polygonal multiaspect shape taper tubular.
Among the embodiment, the termination of exposing of described insulation adapter sleeve is provided with bulb installation spiral shell head 21;
Among the embodiment, for the ease of installing, described lampshade is divided into lampshade lower cover 41, lampshade loam cake 42, described lampshade lower cover is installed in the top of radiator bottom, the shell of described radiator bottom and the end of lampshade lower cover, are along being connected, joining place on the edge, the end of the shell of described radiator bottom and lampshade lower cover is provided with circulation of air gap 43, and the central authorities on the lampshade loam cake are provided with the top cover perforate along being connected with the upper edge of lampshade lower cover at the end of described lampshade loam cake;
Described lampshade top cover is installed in described anti-shade and puts, between lampshade top cover and anti-shade cover, be provided with the gap 51 of ventilating air, the upper surface of lampshade top cover is arranged in the described top cover perforate of lampshade loam cake, is provided with the gap 52 of ventilating air between lampshade loam cake and lampshade top cover.
In one embodiment:
The bottom of described lampshade lower cover is provided with convex edge 44, and the lampshade lower cover is crimped on the top of described radiator shell by a lampshade pressing plate 60, and described lampshade pressing plate is fixed on by screw 61 on the dowel of bottom of radiator; Described lampshade pressing plate is sleeved on the outer wall of described radiator, the lampshade pressing plate around radiator lateral wall sealing arrange, the middle part of lampshade pressing plate raises up, and makes the air duct that (second ventilating duct) formation is communicated with between the interior cover and shell of the described through hole in radiator bottom and radiator bottom.
45 by ultrasonic fusing, described lampshade lower cover, lampshade loam cake, lampshade top cover and radiator lower case constitute the bulb profile of a water droplet shape in the junction for described lampshade lower cover and lampshade loam cake.
Described lumen of radiator is that the cross section is the open cavity in tetragonal tetrahedron upper end, and the outer wall on described tetrahedron cavity top is provided with draw-in groove 19; Upper end at the insulation adapter sleeve is provided with dop 23, the position corresponding with the dop of described insulation adapter sleeve at radiator is provided with draw-in groove 18, radiator is connected by the dop 23 of described draw-in groove 18 with insulation adapter sleeve upper end, and the material of described radiator is the ADC12 aluminium alloy.
Described anti-shade cover is that the lower end is provided with the columnar structured of square boss, is provided with dop 31 on four limits of described square boss, and the inwall on the top of described cylinder is provided with a circle draw-in groove 32; Dop 31 on the described anti-shade cover square boss and described radiator tetrahedron cavity top draw-in groove 19 be connected.
Described lampshade top cover is the circular lid that the lower surface is provided with four card bases, and four card bases of described lampshade top cover lower surface are connected with a circle draw-in groove 32 of described anti-shade cover inwall.
The material of described lampshade lower cover, lampshade loam cake, lampshade top cover is Merlon.
The present invention is in application, devices such as the ac/dc conversion of LED lamp are installed in the insulation adapter sleeve, LED lamp plate 70 is installed on the outer wall of multiaspect shape cavity of radiator, the heat that LED lamp pearl produces be directly conducted on the cavity of radiator and be passed to be attached thereto in put, be the gas channel that is provided with fin in the inside of radiator cavity, can significantly improve the radiating effect of LED lamp; In addition, the part heat can be diffused into the bottom of radiator, by shell and the radiating ribs conduction heat of radiator bottom, further strengthens radiating effect.
Be example with the described LED of Fig. 5, the direction that the lampshade of LED bulb makes progress is installed; When the LED lamp when lighting, radiator absorbs the heat that LED lamp pearl 71 sends, the circumference air, heated air produces air-flow upwards, air 80 enters radiator from the insulation adapter sleeve with the passage 22 along the position that is connected at the bottom of the radiator, upwards flow through and be provided with the space of radiating ribs between radiator shell and the interior cover, the portion of hot air flows out along the circulation of air gap 43 of joining place from the shell of radiator and the end of lampshade lower cover, most of air enters the multiaspect cavity through the lampshade pressing plate from the perforate 16 of radiator multiaspect cavity bottom, air carries out heat exchange with fin in the multiaspect cavity, the gap 51 of heated air between lampshade top cover and anti-shade cover, flow out in gap 52 between lampshade loam cake and the lampshade top cover, takes away the heat that the LED bulb produces.
If described LED bulb is installed with the downward direction of lampshade, air-flow will be with the reverse flow of above-mentioned direction.
As shown in Figure 6, when described LED bulb with lampshade when the direction of level is installed, air 80 from below radiator shell and the passage 22 of the gap between the lampshade lower cover 43 and insulation adapter sleeve enter radiator, most of air enters the multiaspect cavity through the lampshade pressing plate from the perforate 16 of radiator multiaspect cavity bottom, air carries out heat exchange with fin in the multiaspect cavity, flow out in the gap 52 of heated air between gap 51, lampshade loam cake and lampshade top cover between lampshade top cover and the anti-shade cover, takes away the heat that the LED bulb produces; Have the portion of hot air from above radiator shell and the gap between the lampshade lower cover 43 flow out.
Because the LED lamp plate is installed on the outer wall of multiaspect shape cavity of radiator, can produce the more weak shade of brightness at lampshade top cover position, the anti-shade cover that uses light transmissive material to make can effectively weaken described shade.
What the thermal diffusion of LED illuminating product was taked usually is nature diffusion way (this mode can be described as static radiating mode), though there is certain radiating effect, thermal diffusion speed is slow partially.And the thermal convection current that the present invention proposes heat radiation theoretical (this mode can be described as dynamic radiating mode) can effectively improve thermal diffusion speed, namely in the unit interval, increases the heat of diffusion greatly, thereby improves heat dispersion.The existing LED illuminating product stable state temperature rise test data of contrast have reduced about 5～10 ℃ according to the stable state temperature rise of the made finished product of the present invention.
Claims (10)
1.LED the gas thermal convection current radiator structure of bulb, comprise LED lamp plate, radiator and insulation adapter sleeve, illumination LED lamp pearl is installed on the LED lamp plate, the LED lamp plate is installed on the radiator sidewall, the radiator lower end connects the insulation adapter sleeve, the insulation adapter sleeve connects bulb the spiral shell head is installed, and fixedly there is anti-shade cover the radiator upper end, and a top cover snaps in the outside that anti-shade cover is fixed on lampshade the LED lamp plate; It is characterized in that, described radiator is the open tubular structure heat-dissipating cavity in upper end, radiator inwall around tubular structure is provided with fin, fin vertically arranges first ventilating duct that forms up/down perforation along inwall, described LED lamp plate is close to installation around tubular structure radiator lateral wall, the lower end of described radiator is connected with shell and the interior cover of mutual sheathing, the upper/lower terminal of described shell opens wide, and is vertically arranged with dowel and forms second ventilating duct that air is circulated at above-below direction between shell and interior cover; Described interior being sleeved on the described insulation adapter sleeve is connected radiator on the insulation adapter sleeve, and the radiator lower end edge is provided with through hole with shell with the position that interior cover is connected, and described through hole is communicated with first ventilating duct and second ventilating duct; Described shell upper port with at the bottom of the lampshade along being connected, the joining place on edge is provided with the gap notch at the bottom of described shell and lampshade, the clearance groove interruption-forming second ventilating duct upper port air access way, between the shell of the bottom of second ventilating duct and insulation adapter sleeve, be provided with another gap notch, another clearance groove interruption-forming second ventilating duct lower port air access way; The central authorities of lampshade upper end are provided with perforate, and top cover is fixed on lampshade by perforate the outside of LED lamp plate; The inner chamber of described anti-shade cover is communicated with first ventilating duct; Sidewall is provided with ventilation gap between top cover and anti-shade cover, and described ventilation gap is the air access way of first passage.
2. the gas thermal convection current radiator structure of LED bulb according to claim 1 is characterized in that, described first ventilating duct is up-small and down-big taper tubular structure ventilation and heat cavity, and described second channel is up big and down small loop vent heat dissipation channel.
3. the gas thermal convection current radiator structure of LED bulb according to claim 2 is characterized in that, described taper tubular is that cross section is rectangle or polygonal multiaspect shape taper tubular.
4. the gas thermal convection current radiator structure of LED bulb according to claim 2 is characterized in that, the tapering of described taper is that 5 degree are to 7 degree.
5. the gas thermal convection current radiator structure of LED bulb according to claim 1, it is characterized in that, the lampshade loam cake that described lampshade comprises the lampshade lower cover and interlocks with it, the bottom of described lampshade lower cover is provided with the convex edge, the lampshade lower cover is crimped on the top of described radiator shell by a lampshade pressing plate, and described lampshade pressing plate is fixed on by screw on the dowel of bottom of radiator; Described lampshade pressing plate is sleeved on the outer wall on described radiator top, and the middle part of lampshade pressing plate raises up the described through hole of radiator bottom is communicated with described second ventilating duct.
6. the gas thermal convection current radiator structure of LED bulb according to claim 5, it is characterized in that, described lampshade lower cover and lampshade loam cake are by ultrasonic fusing, and described lampshade lower cover, lampshade loam cake and radiator lower case constitute the bulb profile of a water droplet shape.
7. the gas thermal convection current radiator structure of LED bulb according to claim 1 is characterized in that, described radiator is also fixedlyed connected with described insulation adapter sleeve by draw-in groove, and the material of described radiator is the ADC12 aluminium alloy.
8. the gas thermal convection current radiator structure of LED bulb according to claim 1 is characterized in that, described anti-shade cover is that material is the transparent body of Merlon, and described anti-shade cover is fixed on the upper end of described radiator by draw-in groove.
9. the gas thermal convection current radiator structure of LED bulb according to claim 1 is characterized in that, described top cover is fixed on described anti-shade by draw-in groove and puts.
10. the gas thermal convection current radiator structure of LED bulb according to claim 1 is characterized in that the material of described lampshade, top cover is Merlon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191518.3A CN103256582B (en) | 2013-05-22 | 2013-05-22 | Gas heat convection heat dissipating structure of LED bulb |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310191518.3A CN103256582B (en) | 2013-05-22 | 2013-05-22 | Gas heat convection heat dissipating structure of LED bulb |
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| CN103256582A true CN103256582A (en) | 2013-08-21 |
| CN103256582B CN103256582B (en) | 2015-04-22 |
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| CN201310191518.3A Expired - Fee Related CN103256582B (en) | 2013-05-22 | 2013-05-22 | Gas heat convection heat dissipating structure of LED bulb |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103953869A (en) * | 2014-05-20 | 2014-07-30 | 史杰 | Integral type LED (Light Emitting Diode) lamp bulb |
| CN104763957A (en) * | 2015-04-27 | 2015-07-08 | 东莞市闻誉实业有限公司 | Ventilation type led street lamp |
| CN104763989A (en) * | 2015-04-27 | 2015-07-08 | 东莞市闻誉实业有限公司 | Street lamp radiator |
| CN104776333A (en) * | 2015-04-04 | 2015-07-15 | 福建永德吉灯业股份有限公司 | Conically-structured omnidirectional LED (Light-Emitting Diode) lamp |
| CN105020613A (en) * | 2015-07-07 | 2015-11-04 | 佛山燊业光电有限公司 | Wide-angle luminous LED (Light Emitting Diode) lamp |
| CN106369566A (en) * | 2016-09-30 | 2017-02-01 | 程云龙 | Bulb capable of improving radiating efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103953869A (en) * | 2014-05-20 | 2014-07-30 | 史杰 | Integral type LED (Light Emitting Diode) lamp bulb |
| CN104776333A (en) * | 2015-04-04 | 2015-07-15 | 福建永德吉灯业股份有限公司 | Conically-structured omnidirectional LED (Light-Emitting Diode) lamp |
| CN104763957A (en) * | 2015-04-27 | 2015-07-08 | 东莞市闻誉实业有限公司 | Ventilation type led street lamp |
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| CN106369566A (en) * | 2016-09-30 | 2017-02-01 | 程云龙 | Bulb capable of improving radiating efficiency |
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| Publication number | Publication date |
|---|---|
| CN103256582B (en) | 2015-04-22 |
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