CN103775879A - LED (light emitting diode) lamp with multiple-cold-end type glass heat pipe - Google Patents
LED (light emitting diode) lamp with multiple-cold-end type glass heat pipe Download PDFInfo
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- CN103775879A CN103775879A CN201410042610.8A CN201410042610A CN103775879A CN 103775879 A CN103775879 A CN 103775879A CN 201410042610 A CN201410042610 A CN 201410042610A CN 103775879 A CN103775879 A CN 103775879A
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Abstract
The invention relates to an LED (light emitting diode) lamp with a multiple-cold-end type glass heat pipe, which comprises a glass heat pipe, an LED, a driving power supply, an outside electrical connecting interface and a control system, and is characterized in that all parts of a pipe casing of the glass heat pipe are melted, sealed and connected into a whole in a seamless way; the heat end surface of the glass heat pipe is fit with the surface of the LED, and is in heat transfer connection with the heat end of the glass heat pipe; a hole is formed in the upper end surface of the heat end, and the heat end is melted, sealed and connected with the main cold end; the side of the main cold end is connected with a plurality of branch cold ends to form the multiple-cold-end type glass heat pipe. The LED lamp with the multiple-cold-end type glass heat pipe has the advantages that the heat end of the glass heat pipe is insulated and is directly connected with the LED in a heat transfer way, so the heat transfer capability is high; the side is connected with the branch cold ends, so that the larger specific area is realized.
Description
Technical field
The present invention relates to the glass heat pipe LED light fixture of many cold junctions.LED is that the English of lasing fluorescence diode is called for short, and can be regarded as the generally acknowledged technical term of the art.
Background technology
Adopt the LED light fixture of gravity assisted heat pipe, its general configuration should be that the hot junction heat transfer below heat pipe connects several LED.The Main Function that heat pipe here rises should be to realize heat flow density conversion and heat radiation.Relevant heat flow density is transformed to roughly and is transformed to approximately 0.06 watt/square centimeter from approximately 0.5 watt/square centimeter.
Investigate existing LED light fixture, all get 1 centimetre of 2(0.5*0.7*2+0.1.25*(7+5+7+5 by surface conductive entered environment, LED all surfaces are long-pending for one of them long * is wide for the LED of 5*7 millimeter, 0.6 watt of general power, light efficiency 21% and the energy except luminous)), its heat flow density of loading of dispelling the heat is 0.6*(1-0.21) 474 watts/centimetre 2 of/1=0..If do not adopt radiator, the surface temperature of LED can exceed 100 ℃.
Again, be the LED with radiator of 10 watts for a heat radiation load, in the flat cubic centimetre of area of dissipation 200 of its spreader surface, its heat radiation power density is 0. 05 watts/centimetre 2.Reference in contrast: the expose to the sun peak strength of penetrating of sunshine is about 1 Qian Wa/㎡ and closes 0.1 watt/centimetre 2.25 watts of incandescent light bulb that surface area is 170 centimetre 2, because glass cell-shell stops and absorption ultrared, obviously rise the temperature on glass cell-shell surface.Here, get 10 watts of heat radiation powers by glass cell-shell, its heat radiation power density of conducting by glass cell-shell is 0.0588 watt/centimetre 2 of 10/170 ≈.
The computing formula of object heat radiation power and heat-delivery surface temperature rise is:
Q=K*ΔT*S…………
In formula 1, Q is heat radiation power, and dimension is watt; K is the heat transfer coefficient from glass heat pipe cold end surface to air, and dimension is watt/(℃ * ㎡); Δ T is the intensification that air is heated, dimension be K or ℃; S is the area of the glass heat pipe cold junction that contacts with air, and dimension is square metre.
By Q=10, K=23 watt/(℃ * ㎡), S=0.02 ㎡ substitution; 21.74 ℃ of the temperature rise Δ T ≈ of described heat dissipation model.In the time of S=0.017 ㎡, obtain 25.58 ℃ of temperature rise Δ T ≈.Here all heat radiation load all with almost average temperature by with air heat-exchange entered environment.In fact, the numerical value of Coefficient K also comprises that with surface state clean conditions is relevant with emissivity.
For LED light fixture, its heat radiation approach from LED to air is more than incandescent lamp complexity.The temperature rise value of 30 ℃ of relative LED lamp radiator surface environment temperatures is got to 21.74 ℃, and the temperature of getting Heat Conduction Material between LED and heat pipe hot junction fall 2 ℃, the temperature of heat pipe hot junction tube wall fall 2 ℃, fall from heat pipe hot junction to the temperature of cold junction two phase flow heat transfer ignore, the temperature of heat pipe cold junction tube wall falls 1 ℃, the surface temperature of known described LED will reach 30+21.74+1+2+2=56.74 ℃.In view of the surface temperature of LED changes with environment temperature and itself heat flow density.When the peak of set environment temperature is that 30 ℃, heat transfer coefficient are set as 23 and the maximum temperature of LED while being 64 ℃, the glass heat pipe cold junction area that every watt of heat radiation power needs is at least 15 square centimeters; Corresponding heat flow density is 0.0667 watt/centimetre 2.Under this operating mode, the LED10 light decay of ten thousand hours is expected lower than 20%; And existing minority LED light fixture inferior only one summer light decay will reach more than 50%.
Chinese patent 2008200495178 discloses a kind of high power hot pipe LED illuminating apparatus, include LED, pedestal, heat pipe, and be provided with heat abstractor, one side of pedestal is provided with one or more than one LED, and one end of heat pipe is that hot junction is connected with described pedestal, the other end is that cold junction is connected with described heat abstractor.Directly welding or fill heat-conducting silicone grease and without heat transfer medium in the middle of other, thermal resistance is relatively little between heat pipe and pedestal, heat transfer efficiency is high.Have simple in structure, good heat dissipation effect, the feature of reliable operation.But it adopts pedestal heat transfer connection LED that electric insulation layer need to be set and realizes electrical isolation; Its metal heat pipe cold junction configuration radiating fin plate as with the heat exchange interface of air, owing to also having temperature to fall between heat pipe cold junction and radiating fin plate, and the surface temperature of radiating fin plate is inhomogeneous, thereby has increased dispel the heat link and the heat exchange thermal resistance with air; Fin produces cost and is not easy to clean; Between metal heat pipe hot junction and LED, needing withstand voltage higher insulating barrier, itself there is thermal resistance in insulating barrier.LED surface is because of large, the same thermal resistance of heat flow density, and temperature is fallen can be many greatly.Because LED is to responsive to temperature, temperature exceedes 65 ℃ of LED can very fast decline.Therefore, cut down heat transfer link and the thermal resistance of the link that reduces to conduct heat just significant.
Summary of the invention
The object of the invention is to provide the glass heat pipe LED light fixture of many cold junctions.
The present invention realizes the technical scheme of its object: manufacture the glass heat pipe LED light fixture of cold junction more than, comprise glass heat pipe, LED, driving power, with extraneous electrical connection interface and control system.Glass heat pipe comprises glass shell, blast pipe, working medium and liquid-sucking core net.Glass heat pipe cold junction is shaped with or is not shaped with pleated; Comprise two core electric wires or bulb screw mouth connector with extraneous electrical connection interface.When described LED color or colour temperature are while being constant, the multiple LED that form described color or colour temperature comprise that three-primary color LED can only realize with one group of two wire and extraneous electrical connection with extraneous; When described LED color or colour temperature are while being adjustable, the multiple LED that form described color or colour temperature comprise that three-primary color LED adopts respectively one group of two wire to realize and extraneous electrical connection with extraneous separately.Glass heat pipe shell each several part is seamless to be melted to be sealed and connects as one.Adopt a glass heat pipe with discoid hot junction, the hot end surface of described heat pipe matches with the surface of LED and LED conducts heat and is connected with described glass heat pipe hot junction; Melt to seal in the perforate of the upper surface in described hot junction and with main cold junction and be connected; The other some branches cold junction that connects of main cold junction, the glass heat pipe of formation cold junction more than; Or, open the multiple cold junctions of multiple Kong Bingyu in the upper surface in described hot junction and melt envelope connection, form the glass heat pipe of cold junction more than.
Can also make the periphery in described discoid hot junction contain several clamp connection fixed L ED circuit board; On described LED circuit plate, have LED hole; LED is placed in the LED hole of described LED circuit plate and conducts heat with glass heat pipe hot junction and is connected, is electrically connected with LED circuit plate; Control system comprises man-machine interface, adopts wired or wireless mode signal to be connected between control system and man-machine interface.
Can also make described control system comprise that three driving power controllers of governor circuit, memory, man-machine interface and interface circuit thereof, three-primary color LED and interface circuit and software thereof comprise application program; Three driving power controller interface circuits of described governor circuit, memory, user-machine interface circuit and three-primary color LED are connected by bus signals.
Beneficial effect of the present invention: its glass heat pipe hot junction insulation of the glass heat pipe LED light fixture of the many cold junctions of the present invention can directly be conducted heat and be connected with LED, in the situation that directly dispelling the heat with glass heat pipe cold junction, the shortest heat transfer glue or elastic conducting hotting mask and the glass heat pipe only comprising between LED and glass heat pipe of its heat transfer path from LED to environment.Actual effect is: on average reduce under 50 to 70% prerequisites at heat-pipe radiator or even radiator cost, the service life of light decay 20% extending to more than 7 years for average 2 to 3 years from existing heat-pipe radiator or cast aluminium radiator product.The non-ferrous metal that cast aluminium radiator relates to is cast into major source of pollutant; And the processing of glass heat pipe can only relate to fuel gas fire head, its carrying capacity of environment is insignificant.And because carbon emission in long 3 times of service life of glass heat pipe LED light fixture, glass heat pipe radiator production process is few, environmental benefit is obvious.The glass heat pipe cold junction with bigger serface is included in glass heat pipe cold junction and makes and pleatedly can increase considerably temperature and the cost that area of dissipation further reduces LED and increase few.It is good that glass properties is stablized the extremely strong air-tightness of weatherability, and significantly improve service life compared with metal heat pipe.The glass heat pipe LED light fixture of the many cold junctions of the present invention does not adopt fin only to rely on glass heat pipe cold junction heat radiation and adopts compared with the heat pipe LED light fixture of fin has advantages of surperficial easy cleaning.In glass heat pipe tube wall Tu photocatalyst of titanium dioxide coating processed, the organic matter dirt that can utilize the light last decomposition of light fixture to contact with described coating of titanium dioxide, plays the effect of automated cleaning; Especially adopt high-transparent glass to manufacture heat pipe, all surfaces that can make light arrive more light fixture through reflection and transmission carries out automated cleaning.
Glass heat pipe is light, corrosion-resistant, good with working medium compatibility, tube wall venting more than 90% for the consistent or harmless water vapour of working fluids characteristic, can once be blow molded into net shape and comprise the pleated of formation cold end surface.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the glass heat pipe LED light fixture of cold junction more than.
Fig. 2 is total line frame graph of the glass heat pipe LED lamp control system of cold junction more than.
1. glass heat pipes in figure; 2.LED; 3. driving power; 4. with extraneous electrical connection interface; 5. control system; 6. hot junction; 7. main cold junction; 8. branch's cold junction; 9. clip; 10.LED circuit board; 11. man-machine interfaces; 21. governor circuits; 22. memories; 23. user-machine interface circuit; Three driving power controller interface circuits of 24. three-primary color LEDs; 25. buses.
The specific embodiment
Fig. 1 provides first embodiment of the invention.
In Fig. 1, the glass heat pipe LED light fixture of many cold junctions comprise glass heat pipe 1, LED2, driving power 3, with extraneous electrical connection interface 4 and control system 5.The hot junction 6 of glass heat pipe 1 is in the form of annular discs, melts to seal to be connected in hot junction 6 upper surface perforates and with main cold junction 7.The other some branches cold junction 8 that connects of main cold junction 7, the glass heat pipe 1 of formation cold junction more than.Periphery in glass heat pipe 1 hot junction 6 is connected and fixed LED circuit plate 10 with several clips 9.LED circuit plate 10 has LED hole, and LED2 is placed in the LED hole of LED circuit plate 10 and conducts heat and be connected, be electrically connected with LED circuit plate 10 with glass heat pipe 1 hot junction 6.Be arranged at main cold junction 8 tops with extraneous electrical connection interface 4.Control system 5 comprises man-machine interface 11, between control system 5 and man-machine interface 11, adopts wireless signal to be connected.
The glass heat pipe LED light fixture of the many cold junctions of Fig. 1 embodiment can be got less volume in the certain cold junction area situation of maintenance.Because the tube that diameter is 150 millimeters is identical with its cylindrical portion external surface area of contour tube of 30 millimeters of 5 diameters, but both volumes can differ manyfold.
Fig. 2 provides second embodiment of the invention.
In Fig. 2, glass heat pipe LED lamp control system comprises that three driving power controllers of governor circuit 21, memory 22, man-machine interface and interface circuit 23 thereof, three-primary color LED and interface circuit 24 and software thereof comprise application program.Three driving power controller interface circuits 24 of described governor circuit 21, memory 22, user-machine interface circuit 23 and three-primary color LED are connected by bus 25 signals.The man-machine interface of Fig. 2 embodiment comprises a touch device.Described touch device comprises the touch-screen with various background colors.
Can comprise that the variation that application program makes the state of described LED light fixture touch touch-screen position according to user changes by software, such as user touches the redness on touch-screen, LED just sends red light.
Claims (3)
1. the glass heat pipe LED light fixture of cold junction more than, comprise glass heat pipe, LED, driving power, with extraneous electrical connection interface and control system, glass heat pipe comprises glass shell, blast pipe, working medium and liquid-sucking core net; Glass heat pipe cold junction is shaped with or is not shaped with pleated; Comprise two core electric wires or bulb screw mouth connector with extraneous electrical connection interface; When described LED color or colour temperature are while being constant, the multiple LED that form described color or colour temperature comprise that three-primary color LED can only realize with one group of two wire and extraneous electrical connection with extraneous; When described LED color or colour temperature are while being adjustable, the multiple LED that form described color or colour temperature comprise that three-primary color LED adopts respectively one group of two wire to realize and extraneous electrical connection with extraneous separately, it is characterized in that glass heat pipe shell each several part seamless melt to be sealed connect as one; Contain a glass heat pipe with discoid hot junction, the hot end surface of described heat pipe matches with the surface of LED and LED conducts heat and is connected with described glass heat pipe hot junction; Melt to seal in the perforate of the upper surface in described hot junction and with main cold junction and be connected; The other some branches cold junction that connects of main cold junction, the glass heat pipe of formation cold junction more than; Or, open the multiple cold junctions of multiple Kong Bingyu in the upper surface in described hot junction and melt envelope connection, form the glass heat pipe of cold junction more than.
2. the glass heat pipe LED light fixture of many cold junctions according to claim 1, is characterized in that the periphery in described discoid hot junction contains several clamp connection fixed L ED circuit board; On described LED circuit plate, have LED hole; LED is placed in the LED hole of described LED circuit plate and conducts heat with glass heat pipe hot junction and is connected, is electrically connected with LED circuit plate; Control system comprises man-machine interface, adopts wired or wireless mode signal to be connected between control system and man-machine interface.
3. according to the glass heat pipe LED light fixture of the many cold junctions described in claim 1 or 2, it is characterized in that described control system comprises that three driving power controllers of governor circuit, memory, man-machine interface and interface circuit thereof, three-primary color LED and interface circuit and software thereof comprise application program; Three driving power controller interface circuits of described governor circuit, memory, user-machine interface circuit and three-primary color LED are connected by bus signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410042610.8A CN103775879A (en) | 2014-01-28 | 2014-01-28 | LED (light emitting diode) lamp with multiple-cold-end type glass heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410042610.8A CN103775879A (en) | 2014-01-28 | 2014-01-28 | LED (light emitting diode) lamp with multiple-cold-end type glass heat pipe |
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| CN103775879A true CN103775879A (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410042610.8A Pending CN103775879A (en) | 2014-01-28 | 2014-01-28 | LED (light emitting diode) lamp with multiple-cold-end type glass heat pipe |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040213016A1 (en) * | 2003-04-25 | 2004-10-28 | Guide Corporation | Automotive lighting assembly cooling system |
| TW200840973A (en) * | 2007-01-31 | 2008-10-16 | Zalman Tech Co Ltd | LED assembly including cooler having heat pipe |
| CN101806441A (en) * | 2010-03-31 | 2010-08-18 | 西北有色金属研究院 | Large-power LED lamp heat radiator with fins having functions of heat pipes |
| CN101922635A (en) * | 2010-08-17 | 2010-12-22 | 安徽莱德光电技术有限公司 | High-power LED lamp adopting heat pipe for heat dissipation |
| CN102171512A (en) * | 2008-09-30 | 2011-08-31 | 奥斯兰姆施尔凡尼亚公司 | LED source with an integrated heat pipe |
| CN202171216U (en) * | 2011-05-13 | 2012-03-21 | 湖北小天地科技有限公司 | Heat-tube heat sink large-power light-emitting diode (LED) structure |
| CN102883584A (en) * | 2012-06-28 | 2013-01-16 | 蔡州 | High-efficiency heat dissipation device |
| CN102901069A (en) * | 2012-09-20 | 2013-01-30 | 华南理工大学 | Loop type heat-dissipation device for high power light-emitting diode (LED) |
| CN103196116A (en) * | 2012-01-06 | 2013-07-10 | 中国计量学院 | Improved gravity assisted heat pipe radiator used for high-power LED |
-
2014
- 2014-01-28 CN CN201410042610.8A patent/CN103775879A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040213016A1 (en) * | 2003-04-25 | 2004-10-28 | Guide Corporation | Automotive lighting assembly cooling system |
| TW200840973A (en) * | 2007-01-31 | 2008-10-16 | Zalman Tech Co Ltd | LED assembly including cooler having heat pipe |
| CN102171512A (en) * | 2008-09-30 | 2011-08-31 | 奥斯兰姆施尔凡尼亚公司 | LED source with an integrated heat pipe |
| CN101806441A (en) * | 2010-03-31 | 2010-08-18 | 西北有色金属研究院 | Large-power LED lamp heat radiator with fins having functions of heat pipes |
| CN101922635A (en) * | 2010-08-17 | 2010-12-22 | 安徽莱德光电技术有限公司 | High-power LED lamp adopting heat pipe for heat dissipation |
| CN202171216U (en) * | 2011-05-13 | 2012-03-21 | 湖北小天地科技有限公司 | Heat-tube heat sink large-power light-emitting diode (LED) structure |
| CN103196116A (en) * | 2012-01-06 | 2013-07-10 | 中国计量学院 | Improved gravity assisted heat pipe radiator used for high-power LED |
| CN102883584A (en) * | 2012-06-28 | 2013-01-16 | 蔡州 | High-efficiency heat dissipation device |
| CN102901069A (en) * | 2012-09-20 | 2013-01-30 | 华南理工大学 | Loop type heat-dissipation device for high power light-emitting diode (LED) |
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Application publication date: 20140507 |