CN103062736A - High-power LED streetlamp cooling method and LED streetlamp cooled by same - Google Patents

High-power LED streetlamp cooling method and LED streetlamp cooled by same Download PDF

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Publication number
CN103062736A
CN103062736A CN2013100237031A CN201310023703A CN103062736A CN 103062736 A CN103062736 A CN 103062736A CN 2013100237031 A CN2013100237031 A CN 2013100237031A CN 201310023703 A CN201310023703 A CN 201310023703A CN 103062736 A CN103062736 A CN 103062736A
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CN
China
Prior art keywords
lamp
air
led chip
lamp housing
led
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Pending
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CN2013100237031A
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Chinese (zh)
Inventor
史文浩
江安文
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PAN'AN ETONG TECHNOLOGY DEVELOPMENT Co Ltd
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PAN'AN ETONG TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN2013100237031A priority Critical patent/CN103062736A/en
Publication of CN103062736A publication Critical patent/CN103062736A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/72Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting

Abstract

The invention relates to a high-power LED streetlamp cooling method and an LED streetlamp cooled by the same. By the aid of chimney effect and a ventilation and heat radiation cooling way, natural air is introduced into the back of an LED chip component in a lampshell, and junction temperature of an LED chip is lowered. A chimney is a vertically arranged air duct composed of a hollow lamp pole, a guide pipe and a lampshell, an air inlet is arranged on the lower portion of the hollow lamp pole, the upper portion of the hollow lamp pole is provided with a through hole, the hollow lamp pole is communicated with the guide pipe, the guide pipe is communicated into the back of the LED chip component in the lampshell, and an air outlet is arranged on the lampshell. The air enters from the air inlet, upflows in the lamp pole to the guide pipe, then is blown to the back of the LED chip component in the lampshell to bring away heat and is discharged from the air outlet, so the the chimney effect is formed, and junction temperature of the LED chip can be lowered. The high-power LED streetlamp cooling method is green, low-carbon, environment-friendly, low in cost, effective and reliable.

Description

A kind of cool-down method of high-power LED street lamp and adopt the LED street lamp of its cooling
Technical field
The invention belongs to the lighting source technical field, be specifically related to a kind of cool-down method of high-power LED street lamp and adopt the high-power LED street lamp of this cool-down method.
Background technology
Large-power light-emitting diodes (LED) has the advantages such as low power consuming, power saving, life-span be long, durable, thereby is expected replacement traditional lighting light source is become following lighting source, is also referred to as green light source.Yet along with the LED increased power, current potential must increase, thereby the used heat that LED produces electric heating stream can't effectively shed, and causes LED life-span degradation.The P-N of the led light source temperature of becoming a partner is very responsive.Temperature is high, will be had a greatly reduced quality in the life-span of led chip.The LED luminous efficiency can reduce along with service time and number of times, and too high knot surface temperature then can accelerate the decay of LED luminous efficiency, so the design of heat abstractor is quite important, it is also a lot of to derive the problem that need to overcome, even becomes the key of deciding the issue of the battle between LED manufacturer.
As everyone knows, the photosynthetic active radiation of LED (luminosity and/or radiation flux) is affected by its junction temperature seriously.Single LEDs encapsulation is commonly called one-level LED, and the LED assembly that plurality of LEDs is assemblied on the same metal substrate is commonly called secondary LED.When secondary LED is very high to the light requirement, this problem that junction temperature can exert an influence to the LED luminous efficiency, it is very outstanding more to seem.Really the quantity of heat production of LED and light efficiency are irrelevant; Do not exist the electrical power of a few percent to produce light, the electrical power of all the other a few percents produces hot De Guan Department, because the LED junction temperature is complicated problem.How reducing the LED junction temperature, namely how the heat diffusion of LED generation is gone out, is to guarantee that the photosynthetic active radiation of LED is the approach in LED life-span, also is the major issue that LED studies in the industry.
About high-power LED street lamp, the generalized situations of technical research developing focus and Technique Popularizing range of application is both at home and abroad at present:
⑴ make the power LED heat dissipating substrate fin into tubulose; Or fin and tubulose adopt simultaneously; Fin is exposed above lamp housing naturally cooling in air.In the shell design, descended foot the time, but this method just is difficult to prove effective in the summer of sweltering heat.And strengthened the use amount of aluminium, and also increased the weight of LED lamp holder, be unfavorable for installation and maintenance.
⑵ adopt and improve the heat radiation material, as adopting aluminium, heat conduction carbon down to copper material, in the hope of reaching cooling-down effect.
⑶ adopt the cpu fan that is similar in the computer to force cooling, but because LED lamp housing spatial constraints, flow and the blast of wind are little, are difficult to prove effective.
⑷ external great majority adopt heat pipe, loop heat pipe to dispel the heat.These methods all are external patent basically.The heat-transfer mechanism of heat pipe is the intraductal working medium Liquid-Vapor Phase Transition.The thermal medium side is subjected to thermal evaporation outside pipe, in cold side medium heat release condensation, by Working fluid phase changing gasification latent heat transferring heat.This complex structure, with high content of technology, processing cost is high, and cost of investment is larger.And the condensation end of this structure places on the shell, or places in the lamp housing; If do not introduce cold wind, the summer of sweltering heat effect very desirable.
In LED street lamp relevant criterion and the standard, the light decay index is very strict at present, and after basically all requiring to light continuously 3000 hours, light decay is not higher than 2%.Lighted continuously 3000 hours, and meaned and all need light street lamp evening on daytime when test, in the summer of sweltering heat, no matter lamp housing and the lamp stand of street lamp, under the direct irradiation of the sun all up to 60 to 70 degree.When although lamp uses in reality, just just to open at night, temperature will be hanged down a bit, and the condensation end of heat pipe also is difficult to satisfy the condensation requirement.So, adopt such scheme " to be difficult to prove effective " or " not ideal ", and adopt the cost of this method high, especially the heat pipe production difficulty is high.
Summary of the invention
The present invention overcomes the defective that above-mentioned prior art exists, and has proposed a kind of cool-down method of high-power LED street lamp, can effectively reduce the led chip junction temperature, has proposed simultaneously a kind of high-power LED street lamp that adopts this cool-down method.
The technical scheme that technical solution problem of the present invention is taked is:
The one side, a kind of cool-down method of high-power LED street lamp, it adopts the ventilation and heat type of cooling by stack effect, and natural wind is introduced led chip assembly back in the lamp housing, reduces the led chip junction temperature.
The chimney of described stack effect is based on the air channel of vertically setting up.
Described air channel is comprised of hollow lamp stand, mozzle and lamp housing.
The air inlet in described air channel is arranged at the bottom of hollow lamp stand, and the top of hollow lamp stand is provided with through hole and is connected with mozzle, and mozzle passes into led chip assembly back in the lamp housing, and lamp housing is provided with air outlet; Air is entered by air inlet, and is up in lamp stand inside, by mozzle, blows to led chip assembly back in the lamp housing, and with the heat that led chip sheds, temperature rises, and discharges from air outlet, forms stack effect, thereby the junction temperature of led chip is minimized.
Described air outlet is arranged at the lamp housing top and is the windproof and rain proof air outlet.
Second aspect adopts the high-power LED street lamp of first described cool-down method in aspect, comprises the led chip assembly and based on the air channel of vertically setting up.
Described air channel is comprised of hollow lamp stand, mozzle and lamp housing.
The air inlet in described air channel is arranged at the bottom of hollow lamp stand, and the top of hollow lamp stand is provided with through hole and is connected with mozzle, and mozzle passes into led chip assembly back in the lamp housing, and lamp housing is provided with air outlet.
Described air outlet is arranged at the lamp housing top and is the windproof and rain proof air outlet.
As a kind of preferred, this high-power LED street lamp also comprises radiator, and described radiator is arranged at led chip assembly back.
The present invention adopts the ventilation and heat type of cooling by stack effect, and has organically merged the reduction LED junction temperature technology that present broad research is used, and for LED heat radiation, cooling, finds scientific basis and theoretical foundation.And simple, feasible implementation method proposed.The present invention consists of the air channel by the hollow lamp stand, relies on the cold wind (being air) of introducing in the LED lamp stand, and led chip in the lamp housing is carried out forced cooling; And employing Aluminium Radiator section bar, strengthen the fin area on the pedestal, the portraitlandscape of radiator heat-dissipation fin is all linked up, and the cold wind water conservancy diversion mouth of pipe is extended to the root of radiator heat-dissipation fin, the heating center of LED, both taken full advantage of the cold wind resource, the LED junction temperature is descended, and made cooling effectively, reliably.Has certain volume in the lamp housing, the heat that produces because of electric current among the LED causes air themperature rising in the lamp housing, temperature rises highlyer in lamp housing, volume of air in the lamp housing expands, density reduces, and must outside lamp housing be discharged at the lamp housing top, make use of momentum and must want cold air to replenish, air inlet is arranged on bottom or the bottom of hollow lamp stand, and cold wind is inhaled in the lamp housing by the bottom of lamp stand or the air inlet of bottom.Volume of air is more expanded in the lamp housing, and density reduces, and the hot-air of discharging lamp housing is more, and cold air replenishes just sooner, and air quantity and blast strengthen.The flow in cold wind source and flow velocity are relevant with height and the thickness of lamp stand, and be also relevant with air themperature height in the lamp housing.The present invention is also arranging penetrating groove and/or hole along radiating fin, the spacing of groove width or aperture and fin is suitable, to increase the side direction water conservancy diversion, strengthen the contact area of fin and moving air, and be coated with heat loss through radiation cooling coating to promote the heat loss through radiation on fin surface on the radiating fin surface.The windproof and rain proof air outlet is set on the highest summit of lamp housing to be poured in the lamp housing to prevent rainwater and wind-fall.
The chimney principle is exactly the extension of air pressure principle, specifically, the Air Flow of chimney top causes the air pressure of chimney outlet to reduce, and chimney bottom is identical with around atmospheric pressure, namely than the air pressure of chimney outlet more greatly, so so that cold air can be pressed into from chimney bottom the air inlet the inside of chimney on every side, run out of from the outlet of eminence again.Hot air rising, cold air descend, thereby cause flowing of air, the principle of the gravity-flow ventilation of Here it is chimney.Utilize this principle, the passage that mineralization pressure is poor forms convection current, the channel bottom inspiration, and channel roof is discharged.This is so-called stack effect namely.
Key of the present invention is the introducing of cold wind.Since the LED street lamp is installed on the lamp stand of street lamp, and the lamp stand of street lamp to be the metal tube of hollow make, and certain height is arranged, as long as have air inlet in bottom or the bottom of lamp stand, above-mentioned stack effect can produce equally at the lamp stand of street lamp.As long as the air inlet of the bottom of the gas outlet of lamp housing and mast connects, there is the temperature difference to exist, the passage of pressure differential just exists, and it does not rely on any power, and what it was followed is the natural law.It stops never, only is better than summer winter, is better than daytime night.As long as we introduce the gas outlet of the lamp stand of street lamp in the lamp housing of LED street lamp, the LED radiator in the lamp housing forced cooling, beyond doubt best scheme.
The present invention utilizes stack effect, makes up the air channel by the hollow lamp stand, relies on the cold wind of introducing in the LED lamp stand, and led chip in the lamp housing is carried out the thermal diffusion forced cooling; And adopt the Aluminium Radiator section bar, strengthen the fin area on the pedestal; Be coated with simultaneously heat loss through radiation cooling coating on Aluminium Radiator fin surface, strengthen heat loss through radiation.The present invention is the high-powered LED lamp radiating and cooling method of green, low-carbon (LC), environmental protection; Also be a low cost, effective, reliable high-powered LED lamp radiating and cooling method.
Description of drawings
Fig. 1 is one embodiment of the present invention high-power LED street lamp structure partial schematic sectional view.
Fig. 2 is heat spreader structures schematic diagram in one embodiment of the present invention high-power LED street lamp shown in Figure 1.
Fig. 3 is that windproof and rain proof air outlet master looks cross-sectional schematic in one embodiment of the present invention high-power LED street lamp shown in Figure 1.
Fig. 4 is windproof and rain proof air outlet elevational schematic view in one embodiment of the present invention high-power LED street lamp shown in Figure 3.
The specific embodiment
Figure 1 shows that high-power LED street lamp, comprise led chip assembly 2, hollow lamp stand 1, mozzle 4 and lamp housing 3.The back of led chip assembly 2 is provided with radiator 5, and the top of lamp housing 2 is provided with air outlet, and air outlet is windproof and rain proof air outlet 6.The bottom of hollow lamp stand 1 is provided with air inlet 7, the top of hollow lamp stand 1 is provided with through hole and is connected with mozzle 4, mozzle 4 passes in the radiator 5 at lamp housing 3 interior led chip assemblies 2 backs, and the top of lamp housing 3 is provided with air outlet, and hollow lamp stand 1, mozzle 4 and lamp housing 3 consist of the air channel.
Radiator 5 adopts the Aluminium Radiator section bars, and as shown in Figure 2, it is that base plate 8 is provided with numerous fin 9 and forms.Be provided with an inclined hole 10 in the fin end along fin direction to base plate center, the external diameter of aperture and mozzle 4 coupling, hole depth section bar base plate 8 centers of go directly, mozzle 4 can insert wherein, the section bar base plate center of going directly.Aluminium Radiator adopts 1070 type aluminium alloys, coefficient of heat conduction 226W/mK.Base plate of radiator is smooth, and radiating fin is thin, the gap is little.For strengthening the contact area of radiating fin and moving air, be provided with some holes 11 along the fin vertical direction, the aperture also spacing with fin is suitable.And be coated with the ZS-411 heat loss through radiation cooling coating that Beijing high-temperature resistant coating Co., Ltd produces on the radiating fin surface, to strengthen the heat radiation of radiator.
Adopt heat-conducting glue that led chip assembly 2 is bonded on the base plate 8 of radiator 5, that is radiator 5 is settled the back side that is fixed on led chip assembly 2.Must not leave the space during bonding between contact-making surface, the space can have a strong impact on heat transmission.
Lamp housing 3 comprises loam cake and glass lamp shade, and the radiator 5 that is bonded and fixed at led chip assembly 2 back sides is installed in the lamp housing 3, and lamp housing 3 is connected with hollow lamp stand 1.
Mozzle 4 inserts in the inclined hole 10 on the radiators 5 and is added on fixingly, and it reaches radiator fins 9 bottoms deeply, faces the heating center of led chip assembly 2.
The other end of mozzle 4 is connected with the through hole on hollow lamp stand 1 top.
After heat that electric current in the led chip produces passes to radiator, pass to air by radiator fins, the temperature of the air that contacts with fin can rise rapidly, and volume increases, and discharges lamp housing by the air outlet at lamp housing top; This just causes, and gas pressure reduces in the lamp housing, certainly will will come from hollow lamp stand bottom air inlet is advanced into mozzle on lamp stand cold air suction lamp housing.The heat that led chip generates will constantly shed continually.Temperature in the lamp housing is higher, and the flow that sucks cold air will be larger.Mozzle 4 inserts inclined hole 10, and introducing cold wind with the oblique angle is in order to prevent the blast reflection; 11 in the hole of horizontally set is because the heat that the easier LED of taking away of lateral airflow produces.
As shown in Figure 3 and Figure 4, be installed on the windproof and rain proof air outlet 6 at lamp housing 3 tops, formed by gripper shoe 15 fixing inner tube 12, outer tube 13 and taper pipe caps 14, gripper shoe 15 is fixed on outer tube 13 on the outside of inner tube 12, taper pipe cap 14 also is fixed on the top of inner tube 12 and is left air outlet by gripper shoe 15, outer tube 13 is higher than the taper pipe cap 14 on the inner tube 12, and inner tube 12 is weldingly fixed on the tapping that lamp housing 3 tops match, and the hot-air in the lamp housing 3 is discharged from inner tube 12.Hot-air in the lamp housing 3 is discharged by air outlet inner tube 12; Rainwater then flows on the lamp housing 3 in, the outer tube 13 outer by inner tube 12 and flows away, and lamp housing 3 outer air-flows can not pour in down a chimney in lamp housing 3 yet.
The LED street lamp generally is to open at night, and the air of the air in the evening lamp housing and lamp stand bottom, the temperature difference strengthens, and mineralization pressure is poor also can be larger, and the pressure flow of cold wind can be so that the heat that led chip produces obtains discharging.
Taking the method that high-power LED street lamp is lowered the temperature, owing to utilized the air pressure principle, is the natural law, so simple, reliable.Leakage also is convenient to check to cold wind, as long as inject colored gas at the air inlet of lamp stand bottom, namely can find intuitively the air channel leakage position such as red, blue look, is remedied, keeps in repair.

Claims (10)

1. the cool-down method of a high-power LED street lamp is characterized in that, by stack effect, adopts the ventilation and heat type of cooling, and natural wind is introduced led chip assembly back in the lamp housing, reduces the led chip junction temperature.
2. the cool-down method of high-power LED street lamp according to claim 1 is characterized in that, the chimney of described stack effect is based on the air channel of vertically setting up.
3. the cool-down method of high-power LED street lamp according to claim 2 is characterized in that, described air channel is comprised of hollow lamp stand, mozzle and lamp housing.
4. the cool-down method of high-power LED street lamp according to claim 3, it is characterized in that, the air inlet in described air channel is arranged at the bottom of hollow lamp stand, the top of hollow lamp stand is provided with through hole and is connected with mozzle, mozzle passes into led chip assembly back in the lamp housing, and lamp housing is provided with air outlet; Air is entered by air inlet, and is up in lamp stand inside, by mozzle, blows to led chip assembly back in the lamp housing, and with the heat that led chip sheds, temperature rises, and discharges from air outlet, forms stack effect, thereby the junction temperature of led chip is minimized.
5. the cool-down method of high-power LED street lamp according to claim 4 is characterized in that, described air outlet is arranged at the lamp housing top and is the windproof and rain proof air outlet.
6. adopt the high-power LED street lamp of the described cool-down method of any one of claim 1 to 5, it is characterized in that, comprise the led chip assembly and based on the air channel of vertically setting up.
7. high-power LED street lamp according to claim 6 is characterized in that, described air channel is comprised of hollow lamp stand, mozzle and lamp housing.
8. high-power LED street lamp according to claim 7, it is characterized in that the air inlet in described air channel is arranged at the bottom of hollow lamp stand, the top of hollow lamp stand is provided with through hole and is connected with mozzle, mozzle passes into led chip assembly back in the lamp housing, and lamp housing is provided with air outlet.
9. high-power LED street lamp according to claim 8 is characterized in that, described air outlet is arranged at the lamp housing top and is the windproof and rain proof air outlet.
10. high-power LED street lamp according to claim 6 is characterized in that, also comprises radiator, and described radiator is arranged at led chip assembly back.
CN2013100237031A 2013-01-23 2013-01-23 High-power LED streetlamp cooling method and LED streetlamp cooled by same Pending CN103062736A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103756389A (en) * 2014-01-10 2014-04-30 山东申安照明科技有限公司 Radiative heat loss cooling coating, preparation method and application thereof
US20150000875A1 (en) * 2013-06-26 2015-01-01 Tai-Her Yang Heat-dissipating structure having embedded support tube to form internally recycling heat transfer fluid and application apparatus
CN106439593A (en) * 2016-08-19 2017-02-22 中节能晶和照明有限公司 Novel LED road lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200968532Y (en) * 2006-11-28 2007-10-31 徐加同 Road and plaza lighting lamp
CN101881404A (en) * 2010-07-01 2010-11-10 王干 Intelligently controlled forced convection radiation LED streetlamp system
CN201680240U (en) * 2010-04-26 2010-12-22 企达工业(南京)有限公司 LED streetlamp with novel structure
CN201892115U (en) * 2010-10-20 2011-07-06 中山市世耀光电科技有限公司 LED streetlight
CN102261610A (en) * 2011-09-06 2011-11-30 浙江安迪科技发展有限公司 High-power LED road lighting lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200968532Y (en) * 2006-11-28 2007-10-31 徐加同 Road and plaza lighting lamp
CN201680240U (en) * 2010-04-26 2010-12-22 企达工业(南京)有限公司 LED streetlamp with novel structure
CN101881404A (en) * 2010-07-01 2010-11-10 王干 Intelligently controlled forced convection radiation LED streetlamp system
CN201892115U (en) * 2010-10-20 2011-07-06 中山市世耀光电科技有限公司 LED streetlight
CN102261610A (en) * 2011-09-06 2011-11-30 浙江安迪科技发展有限公司 High-power LED road lighting lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150000875A1 (en) * 2013-06-26 2015-01-01 Tai-Her Yang Heat-dissipating structure having embedded support tube to form internally recycling heat transfer fluid and application apparatus
US9970687B2 (en) * 2013-06-26 2018-05-15 Tai-Her Yang Heat-dissipating structure having embedded support tube to form internally recycling heat transfer fluid and application apparatus
CN103756389A (en) * 2014-01-10 2014-04-30 山东申安照明科技有限公司 Radiative heat loss cooling coating, preparation method and application thereof
CN106439593A (en) * 2016-08-19 2017-02-22 中节能晶和照明有限公司 Novel LED road lamp

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Application publication date: 20130424