CN101865433A - Installation method of LED streetlamp driving power supply - Google Patents

Installation method of LED streetlamp driving power supply Download PDF

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CN101865433A
CN101865433A CN201010220920A CN201010220920A CN101865433A CN 101865433 A CN101865433 A CN 101865433A CN 201010220920 A CN201010220920 A CN 201010220920A CN 201010220920 A CN201010220920 A CN 201010220920A CN 101865433 A CN101865433 A CN 101865433A
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driving power
power supply
installation
heat
led
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赵党生
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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

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Abstract

The invention discloses a method for installing an LED streetlamp power supply, which relates to the field of lighting. The method comprises the following steps that: step 1: digging an installation pit which is larger than a driving power supply underground near an LED streetlamp post; step 2: putting the LED streetlamp driving power supply into the installation pit, and connecting the driving power supply and an LED lamp cap and a power supply line; step 3: burying a heat transfer medium into the installation pit to wrap the driving power supply; and step 4: burying the installation pit. The invention installs the LED streetlamp driving power supply underground, provides ambient temperature which is suitable for the driving power supply to work with the characteristic that ground temperature is relatively more stable than the air temperature, and prevents the phenomenon that the LED streetlamp cannot be used or installed in some areas because of the extreme weather. The heat produced when the driving power supply works can be transferred to the underground through the heat transfer medium, so that the driving power supply can maintain quite low temperature after working for a long time, thereby prolonging the service life of the driving power supply.

Description

A kind of installation method of LED streetlamp driving power supply
Technical field
The present invention relates to lighting field, be specifically related to a kind of installation method that can improve LED streetlamp driving power supply operating ambient temperature.
Background technology
LED (Light Emitting Diode) light emitting diode is a kind of solid-state semiconductor devices, and it can directly be converted into luminous energy to electric energy.Semiconductor is made up of two parts, a part is a P-type semiconductor, occupy an leading position in its hole, the inside, the other end is a N-type semiconductor, mainly is electronics here, when these two kinds of semiconductors couple together, just form one " P-N knot " between them, when electric current acted on this light emitting diode by lead, electronics will be pushed to the P district, the electronics that injects the hole in P district and injection N district is diffusing to active area after radiation recombination and send photon is converted into luminous energy with electric energy.
The LED street lamp is as light source with light emitting diode, it is a kind of solid-state cold light source, the light source of LED street lamp adopts low pressure or HVDC power supply, have efficient, safety, energy-saving and environmental protection, distinct advantages such as the life-span is long, response speed is fast, colour rendering index height, now be widely used in city illumination.The outer cover of LED street lamp adopts the PC pipe to make, high temperature resistant 135 degree that reach, low temperature resistant reaching-45 degree.Driving power adopts direct current 9V-30V or civil power to exchange the wide voltage input of 84V-264V, and the output of constant current accurately makes every LEDs light source works under invariable rated current, and line loss and aging coefficient are little, photoelectric transformation efficiency 〉=85%.But the heat that produces during each parts work is a key factor that influences LED street lamp life-span and development, LED is a photoelectric device, have only 15%~25% electric energy to convert luminous energy in its course of work, remaining electric energy nearly all converts heat energy to, causes the temperature of LED lamp to raise.High-powered LED lamp particularly, the big especially problem of caloric value, for example: 1 10W white light LEDs is if its photoelectric transformation efficiency is 20%, then there is the electric energy of 8W to convert heat energy to, if do not add cooling measure, then the device core temperature of great power LED can rise rapidly, and when its junction temperature (TJ) rises above maximum allowable temperature (being generally less than 150 ℃), great power LED can damage because of overheated.Therefore in the high-power LED lamp design, topmost design work is exactly a heat dissipation design.If it is bad that heat radiation solves, can cause rapidly that LED is aging, stability reduces, light decay is big, table 1 be the junction temperature TJ of large power white light LED when brightness decay 70% and the life relation reference table:
??Tj(℃) Life (hour) ??Tj(℃) Life (hour)
??25 ??234000 ??85 ??29500
??30 ??191000 ??90 ??25700
??35 ??157000 ??95 ??22300
??40 ??129000 ??100 ??19500
??45 ??107000 ??105 ??17100
??Tj(℃) Life (hour) ??Tj(℃) Life (hour)
??50 ??90000 ??110 ??15100
??55 ??75000 ??115 ??13300
??60 ??64000 ??120 ??11700
??65 ??54000 ??125 ??10500
??70 ??46000 ??130 ??9300
??75 ??39000 ??140 ??7500
??80 ??34000 ??150 ??6000
As can be seen from the above table: in the time of TJ=50 ℃, the life-span is 90000 hours, and in the time of TJ=80 ℃, the life-span drops to 34000 hours, and in the time of TJ=115 ℃, its life-span has had only 13300 hours.TJ will propose the maximum junction temperature value TJmax that allows in heat dissipation design, actual junction temperature value TJ should be less than or equal to the TJmax of requirement, i.e. TJ≤TJmax.But the junction temperature temperature that can find out the light emitting diode operate as normal from above test data is answered<85 ℃.Being higher than this temperature range efficient will reduce greatly, burn even.So junction temperature is low more, the led chip life-span is just long more in theory.
Existing LED street lamp is the integrated of a system, and structural design all is the integrated design, and LED, driving power, radiator are installed together, and a plurality of LED particles are made up.Radiating mode mainly contains: Natural Heat Convection, install fan forced heat radiation, heat pipe, loop heat pipe heat radiation and temperature-uniforming plate heat radiation etc. additional.In the heater members of LED street lamp, mainly be light emitting diode and driving power.Driving power need be pressed the direct current that converts the constant current that needs to electric main, just can make the LED operate as normal, we can say that driving power is the heart of whole LED illuminator.Driving power is made of some discrete components and integrated circuit, and these electronic components also can produce certain heat in the course of the work.According to the difference of circuit design, electronic device and load, the 8%-15% that the heat that driving power produced accounts for input power does not usually wait, this part caloric requirement by driving power itself towards periphery environment distribute.Usually because the driving power area of dissipation is limited, when just starting working because self temperature and the environment temperature temperature difference are less, heat exchange efficiency is lower, some heat energy can not effectively be passed, cause the time of driving power work long more, it is also just high more that its temperature rises, and just can make heat of sending and the heat that dissipates reach balance after temperature improves certain level.The life-span bottleneck of driving power depends on the life-span of employed electrochemical capacitor usually, and the life-span of electrochemical capacitor is to follow the principle that every rising 10 degrees centigrade of life-spans reduce by half, so the temperature when if driving power reaches thermal balance is high more, the life-span of driving power and reliability all can be low more, or even damage fast.
Except the heating problem of above-mentioned driving power, the LED driving power also has a minimum operating temperature restriction.This index has reflected the ability of the tolerance low temperature environment of driving power, can occur the fault that can't start when environment temperature is lower than the minimum permission operating temperature of LED power supply.Simultaneously the LED driving power is applied in the winter severe cold area when using, and driving power is met the cold contraction state that is in, the expansion of will generating heat after starting working under the daytime off working state.Because the parts material difference of driving power, thermal coefficient of expansion are also different, the thermal shock that moves in circles also can increase the risk of driving power internal components physical damage greatly.
The main mounting means of LED streetlamp driving power supply is that driving power and LED lamp body are installed together in the prior art, and driving power is installed in the power storehouse on the lamp holder or directly exposes in the air, and there are following two problems in this class mode:
(1) weight is excessive, and such scheme usually needs to strengthen the volume of radiator in order to carry driving power or to increase area of dissipation, adds the weight of driving power itself, makes the weight of LED lamp holder generally reach 10-~50 kilogram, and extremely inconvenience is installed.And, also need high-intensity lamp stand in order to support the LED lamp holder of weight like this, strengthened the cost of whole street lamp.Another problem that the weight increase brings is exactly that the fixture of lamp holder easily breaks away from, damages, and has increased the hidden danger that the LED lamp holder drops, and not only can cause economic loss, also pedestrian under the lamp and vehicle has been increased potential danger.
(2) heat dissipation problem, the LED street lamp can produce a large amount of heat energy when illumination, the general aluminum thermal fin that uses dispels the heat, and driving power in the course of the work, can produce heat equally,, will take place not to be that driving power passed to led light source with heat if light source and driving power use same pack heat dissipation device, be exactly that led light source has been passed to driving power with heat, there is the problem of phase mutual interference in both.If the LED driving power inserted avoid in independent bin or the lamp stand and the mutual Conduction Interference of led light source heat, reduced normal air again and flowed.If place outside the LED lamp body driving power is exposed, then can directly make driving power just form hot environment owing to sunlight is exposed to the sun in off working state, all totally unfavorable to the heat radiation of driving power.
(3) low temperature tolerance ability, above-mentioned mounting means all make the LED driving power directly be subjected to the influence of air themperature inevitably.Usually the normal working temperature of driving power is more than 40 degrees below zero, and when the driving power normal working temperature appears being lower than in cold district, the driving power in the said method can't start work.Allow operating temperature normally to start even if be higher than, also can produce in the violent thermal shock self causing great influence in driving power work heating back.
(4) safeguard inconvenience, the reliability of driving power is lower than the reliability of LED under normal conditions, and driving power is installed in light source, apart from ground number meter height to tens of meters, in case just needing to safeguard needs special-purpose engineering truck and professional to carry out work high above the ground, not only trouble but also dangerous.
Summary of the invention
Influenced by ambient temperature big for solving in the prior art LED streetlamp driving power supply, and can not the heat dissipation problem of fine solution driving power own, in that exceed under the environment temperature of working range can't operate as normal or the high problem of fault rate, the invention provides a kind ofly implement conveniently, applied widely and less affected by environment, can keep working long hours and the temperature little LED streetlamp driving power supply installation method that raises, concrete scheme is as follows: a kind of installation method of LED streetlamp driving power supply, it is characterized in that, comprise the steps:
Near step 1: the underground installation pit that digs a volume greater than the driving power volume the LED street lamp post;
Step 2: the LED streetlamp driving power supply is put into installation pit, and connect the input and output circuit of driving power;
Step 3: in installation pit, bury and fill out heat-conducting medium and driving power is encased;
Step 4: bury installation pit.
Another method for optimizing of the present invention: the volume ratio of the volume of installation pit and driving power is 1~10 in the described step 1: 1.
Another method for optimizing of the present invention: the degree of depth of installation pit is in 200CM in the described step 1.
Another method for optimizing of the present invention: described installation pit preferred depth is in 20~45CM.
Another method for optimizing of the present invention: driving power is equipped with the fixed frame that prevents that heat-conducting medium runs off outward in the described step 2, and the volume of fixed frame is less than or equal to the volume of installation pit greater than the volume of driving power.
Another method for optimizing of the present invention: the joint of input and output circuit is positioned at installation pit or is positioned at the LED street lamp post in the described step 3.
Another method for optimizing of the present invention: the heat-conducting medium in the described step 3 is one or more the mixture in fine sand, rubble or the fine ceramic grain.
Another method for optimizing of the present invention: be mixed with lime in the described heat-conducting medium, the volume ratio of described lime and heat-conducting medium is 1: 30~50.
Another method for optimizing of the present invention: burying in the described step 4 adopted following method: the direct backfill capping of the earth installation pit hole that utilizes cement plate direct capping installation pit hole or utilization to dig out.
The present invention is installed in subsurface with the driving power of LED street lamp, utilize the relative air themperature of ground temperature that the environment of a suitable driving power job is provided than stable properties, the temperature of driving power also can be remained in the working range in the weather of severe cold, avoided occurring the situation that limit weather could use or install the LED street lamp in certain areas.Even in extremely hot summer, the above higher air themperature in ground can not have much impact to being installed in underground driving power yet, and driving power can be worked in a rational temperature scope.And driving power need not expose in the sun again, prevented the aging conditions that sunlight and wind and rain cause.The heat of driving power when work can also utilize heat-conducting medium to be transmitted in the ground, makes driving power under situation about working long hours, and keeps a lower temperature rather than continue rising, and prolonged the life-span of driving power greatly.Driving power is installed in underground, has also avoided climbing to the height of several meters or tens meters and in the air driving power has been safeguarded, can effectively avoid safeguarding the complexity and the danger of replacing.Utilize the installation pits and different heat-conducting mediums of different sizes, can carry out heat conduction the driving power of different capacity, utilize fixed frame promptly fixedly heat-conducting medium prevent that infiltration runs off, also bring convenience for equipment replacement.The heat-conducting medium that mixes lime can also dampproof protection against insects, avoids equipment impaired.This method not only adapts to limit high temperature, extremely frigid zones, can also guarantee to reduce in the operating temperature in normal temperature area, has solved a difficult problem of LED road lamp cooling aspect, for LED street lamp universal opened new situation.
Description of drawings
The driving power installation site schematic diagram of Fig. 1 LED street lamp of the present invention
Wherein label 1-installation pit, 2-driving power, 3-input and output circuit, 4-heat-conducting medium, 5-fixed frame
The specific embodiment
As shown in Figure 1, this method adopts near the subsurface LED street lamp post, dig the installation pit of burying driving power 1 of a certain depth, driving power 2 is placed in the installation pit, the volume of installation pit 1 is greater than the volume of driving power 2, the input of driving power is connected with the supply line of LED lamp with supply line respectively with output circuit 3, and the tap points of driving power and supply line and LED lamp supply line can be positioned at installation pit, also can be positioned at the LED street lamp post.In installation pit, fill out the heat-conducting mediums 4 a kind of or wherein several formations in fine sand, rubble or the fine ceramic grain, in the middle of heat-conducting medium encases driving power and be trapped among, need to guarantee that driving power does not have the space in installation pit, the earth that the effect of fine sand, rubble or fine ceramic grain is the heat that produces when being used for conducting driving power work around the installation pit, when surface temperature is in extreme situation, can also keep not that the driving power self-temperature is in the storage temperature range of qualification under the working condition.
The volume ratio of installation pit and driving power is generally considered the size of LED street lamp power, and the power of driving power is big more, and the volume of corresponding installation pit is just big more, and both volume ratios are generally 1~10: 1, preferably adopted 5: 1.Being filled in can increase some lime in the heat-conducting medium in the installation pit and be used for insect protected and protection against the tide, and the ratio of lime and heat-conducting medium is 1: 30~50, also lime directly can be filled out between heat-conducting medium and installation pit.
In order to prevent heat-conducting medium because rain, reason such as snow melting brought in the earth by water, cause and occur the space in the installation pit, influence the radiating effect of driving power, this programme is at fixed frame 5 of outer cover of driving power, the shape of fixed frame is corresponding with the shape of driving power, it is inside and outside that heat-conducting medium 4 is filled in fixed frame 5, both played fixation and also played conductive force.The general preferred employing aluminum of the material of fixed frame is done, and can prevent to get rusty the volume of the volume≤installation pit of fixed frame.Because the LED street lamp all is installed in outdoor, need stand sleet, therefore driving power has all been done water-proofing treatment, but for reducing unexpected the appearance, this method is installed a conical top cover at the fixed frame top, be used for the water that infiltrates on the ground is guided to fixed outer frame, fixed frame also can be installed a sealing end, is used to prevent phreatic infiltration.Can also adopt the modular operation, driving power, heat-conducting medium and fixed frame are carried out in advance, when the LED street lamp is installed, directly put into installation pit and get final product, when needing repairing, directly excavate the hole fixed frame is proposed to get final product.
Table 2 is Heilongjiang Province's Mohe County nearly 5 years air themperatures, ground (0cm) and deep ground temperature (40cm, 80cm, 160cm) extreme value data
Figure BSA00000177492800071
As seen from the above table, subsurface temperature is subjected to the factor and underground overhead the distance dependent of ground environment temperature effect, the size that the degree of depth decision driving power of installation pit is influenced by surface temperature, the degree of depth of installation pit can in subsurface 10-200CM, certainly only dark more good more from effect, but consider construction cost and construction feasibility, this method base area surface temperature and apart from the optimum efficiency between the degree of depth temperature of ground, get installation pit and be positioned at subsurface 20-45CM degree of depth place, ground temperature between this lane place is comparatively stable, the storage and the work of suitable LED driving power, promptly at this depth bounds, in great majority surpass environment under the driving power working range temperature, the LED street lamp can be installed, also can not produce excessive earthwork construction amount.
Adopt another advantage of underground installation driving power to be, compare driving power and be installed in airborne mode, the LED street lamp is after working long hours, the temperature of driving power can be more and more higher, the high temperature that continues can cause the life-span of driving power to descend, and be buried in underground after because the conduction of heat-conducting medium makes the driving power self-temperature just be controlled in 60 degrees centigrade, this is the suitable operating temperature of driving power.And be buried in the underground influence that also is not subjected to high hot-air in summer.
The installation pit of driving power is installed, directly the earth that digs out of backfill is buried, and the capping that also can adopt materials such as cement, fragment of brick to make is covered, and directly excavates earth or start the cement lid to get final product when safeguarding, simple and convenient, need not go up lamp stand because of the problem of driving power again and safeguard.
This method can also prevent because of each parts of driving power itself because the problem that the coefficient of expansion differs and causes each abutment under thermal shock to be broken down.The installation pit of this method also can adopt brick or cement one class to build out the installation pit of a needs size, recharges heat-conducting medium, and this mode just need not install and fix frame again, also can protect heat-conducting medium can not scatter and disappear, but construction is more loaded down with trivial details.
More than be to the disclosing of a kind of concrete installation method of driving power in the LED street lamp, but be not limited in this, those skilled in the art are according to the disclosed technical scheme of this method, and the technical scheme of having done that is equal to or is out of shape is also within protection scope of the present invention.This method is suitable for other field equally, as some environment is had the device of specific (special) requirements, the also technical scheme that can adopt this method to propose.

Claims (9)

1. the installation method of a LED streetlamp driving power supply is characterized in that, comprises the steps:
Near step 1: the underground installation pit (1) that digs a volume greater than the driving power volume the LED street lamp post;
Step 2: the LED streetlamp driving power supply is put into installation pit, and connect the input and output circuit (3) of driving power (2);
Step 3: in installation pit, bury and fill out heat-conducting medium (4) and driving power (2) is encased;
Step 4: bury installation pit (1).
2. installation method as claimed in claim 1 is characterized in that, the volume ratio of the volume of installation pit in the described step 1 (1) and driving power (2) is 1~10: 1.
3. installation method as claimed in claim 1 is characterized in that the degree of depth of installation pit is in 200CM in the described step 1.
4. installation method as claimed in claim 3 is characterized in that, described installation pit (1) preferred depth is in 20~45CM.
5. installation method as claimed in claim 1 is characterized in that, the outer fixed frame (5) that prevents that heat-conducting medium runs off that is equipped with of driving power in the described step 2 (2), and the volume of fixed frame is less than or equal to the volume of installation pit greater than the volume of driving power.
6. installation method as claimed in claim 1 is characterized in that, the joint of input and output circuit is positioned at installation pit or is positioned at the LED street lamp post in the described step 2.
7. installation method as claimed in claim 1 is characterized in that, the heat-conducting medium in the described step 3 is one or more the mixture in fine sand, rubble or the fine ceramic grain.
8. installation method as claimed in claim 7 is characterized in that, is mixed with lime in the described heat-conducting medium, and the volume ratio of described lime and heat-conducting medium is 1: 30~50.
9. installation method as claimed in claim 1 is characterized in that, burying in the described step 4 adopted following method: the direct backfill capping of the earth installation pit hole that utilizes cement plate direct capping installation pit hole or utilization to dig out.
CN201010220920A 2010-07-08 2010-07-08 Installation method of LED streetlamp driving power supply Pending CN101865433A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104006359A (en) * 2014-06-10 2014-08-27 国家电网公司 Street lamp erecting method
CN107504462A (en) * 2017-09-21 2017-12-22 重庆秉为科技有限公司 A kind of LED street lamp installation method
CN108332141A (en) * 2018-01-02 2018-07-27 深圳市奈士迪技术研发有限公司 It is a kind of that there is anti-climbing and function for expelling pests outdoor illumination equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1871677A (en) * 2003-10-29 2006-11-29 昭和电工株式会社 Electrolytic capacitor
CN201294245Y (en) * 2008-11-14 2009-08-19 徐剑雄 Accumulator tunnel
CN201414026Y (en) * 2009-05-27 2010-02-24 董强 Power supply embedding system
CN201414011Y (en) * 2009-05-27 2010-02-24 董强 Complementary wind-solar off-grid power supply system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1871677A (en) * 2003-10-29 2006-11-29 昭和电工株式会社 Electrolytic capacitor
CN201294245Y (en) * 2008-11-14 2009-08-19 徐剑雄 Accumulator tunnel
CN201414026Y (en) * 2009-05-27 2010-02-24 董强 Power supply embedding system
CN201414011Y (en) * 2009-05-27 2010-02-24 董强 Complementary wind-solar off-grid power supply system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104006359A (en) * 2014-06-10 2014-08-27 国家电网公司 Street lamp erecting method
CN104006359B (en) * 2014-06-10 2016-12-07 国家电网公司 Erecting road lamp method
CN107504462A (en) * 2017-09-21 2017-12-22 重庆秉为科技有限公司 A kind of LED street lamp installation method
CN108332141A (en) * 2018-01-02 2018-07-27 深圳市奈士迪技术研发有限公司 It is a kind of that there is anti-climbing and function for expelling pests outdoor illumination equipment

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Application publication date: 20101020