CN203549522U - Led lamp - Google Patents
Led lamp Download PDFInfo
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- CN203549522U CN203549522U CN201320787102.3U CN201320787102U CN203549522U CN 203549522 U CN203549522 U CN 203549522U CN 201320787102 U CN201320787102 U CN 201320787102U CN 203549522 U CN203549522 U CN 203549522U
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Abstract
The utility model discloses an LED lamp. The LED lamp comprises a casing and a circuit board arranged in the casing, wherein the circuit board comprises a first side and a second side which are opposite, the first side is provided with a plurality of LED luminous bodies, the second side is coated with a magnetic catalyst film, and first carbon nano tubes for radiating heat produced by the circuit board and the LED luminous bodies are arranged on the magnetic catalyst film and vertically arranged on the second side in a protruding mode. The LED lamp has the advantages of being good in heat radiating effect and long in service life.
Description
Technical field
The utility model relates to light fixture, more particularly, relates to a kind of LED light fixture.
Background technology
LED be called as the 4th generation lighting source and green light source, there is the features such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in the fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.In recent years, some developed countries have launched fierce technology contest around the development of LED in the world, and wherein LED heat radiation is a problem demanding prompt solution always.The reason of LED heating is because the electric energy adding is not all converted into luminous energy, but a part transforms into heat energy.The electro-optical efficiency of LED approximately only has 20～30% left and right.That is to say that about 70% electric energy has all become heat energy.
According to shining A Leiniusi rule, 10 ℃ of life-spans of the every reduction of temperature can extend 2 times.From the light decay of Cree company issue and the relation of junction temperature, can find out also, if junction temperature can be controlled at 65 ℃, the life-span of its light decay to 70% could be up to 100,000 hours so! This is that the bad junction temperature of dispelling the heat is just high because the light decay of LED or its life-span are directly relevant with its junction temperature, and the life-span is just short.Visible improvement heat radiation, controlling junction temperature is very important thing.The heating of LED also can make its spectrum move in addition; Colour temperature raises; Forward current increases (during constant voltage power supply); Reversing the current also increases; Thermal stress increases; The problems such as the aging acceleration of fluorescent material epoxy resin.
Along with the development of high-capacity LED technology, make the harsh challenge of LED lamp surface just before heat management and heat dissipation design, because raising, temperature not only can cause brightness to decline, when exceeding 100° centigrade, temperature more can accelerate the deteriorated of light fitting body and encapsulating material.Therefore,, except the heat dissipation technology of LED package assembling itself, the heat radiation of LED light fixture and heat conductive design maintain the maximum key of lamp life especially.
So the heat radiation of LED light fixture is an of paramount importance problem in the design of LED light fixture.This is that the bad junction temperature of dispelling the heat is height just because the light decay of LED or its life-span are directly relevant with its junction temperature, the life-span is just short, so that the life-span of LED light fixture has become a subject matter that affects its performance.
The radiating mode of the current common employing of LED light fixture on the market has Natural Heat Convection mode, fan forced heat radiation and loop heat pipe heat radiation etc.
Natural Heat Convection is (for example: radiating fin, lamp shell, system circuit board to see through radiator ... Deng) directly contact with air, the air of radiator periphery becomes hot-air because absorbing heat, then hot air rising, cold air declines, nature will drive air to produce convection current, reaches the effect of heat radiation.Along with the release of high power light fixture product, use Natural Heat Convection need have larger cooling surface area, need provide larger area of dissipation, the effect of strengthening heat loss through convection.Though the use of radiating fin increases radiating effect, but overall weight and the cost of light fixture have also been increased, more increased the risk that light fixture hangs safely, in addition, LED light fixture often faces the problems such as dust fall accumulation, once through using for a long time, too much dirty, dust accumulation, in radiating fin, will weaken heat-sinking capability.
Fan forced heat radiation is exactly to produce cross-ventilation by fan, hot-air is derived to light fitting body is external to dispel the heat, and uses fan forced heat radiation very effective hot type to be gone out.But fan has the shortcoming of following aspect: if light fixture is used fan forced heat radiation, first can more take electricity, what LED illumination was said is exactly energy-conservation, although some small fans only has several W, consumes for a long time together with lamp, has for no reason increased energy consumption.The life-span of next fan, if depend fan cooling alone, fan one went wrong far less than the LED life-span, and this lamp will face serious light decay and dead lamp phenomenon at once.Also has noise; Adopt the light fixture of fan once having opened no small noise, and the environment for use of light fixture is scarcely fine, dust once more than noise larger, when dust brings resistance increment power consumption simultaneously, also allow fan die young.
Loop heat pipe dispel the heat this kind of heat dissipating method be see through circulating heat pipe dispel the heat, the two ends of loop pipe are system circuit board (thermal source place) and radiator, the inside of loop pipe filling working fluid, and is furnished with evaporimeter, its operation principle is: when system circuit board transmits heat energy, the working fluid at thermal source place absorbs after heat, through evaporimeter, change gas into, utilize gas to move characteristic fast, the heat at thermal source place can be transmitted to lamp housing or radiator fast, therefore loop heat pipe heat radiation only solves heat conduction problem, cannot effectively reach " heat radiation " function.
The research of high-power LED lamp heat dissipation technology at present is only set about with two angles of thermal convection current from heat conduction, and this all increases weight or the cost of light fixture entirety undoubtedly.
To sum up, there is the shortcoming that radiating effect is poor, overall weight is heavier, cost is higher in LED light fixture of the prior art.
Utility model content
The technical problems to be solved in the utility model is, for the above-mentioned LED light fixture of prior art, have that radiating effect is poor, overall weight is heavier, cost is higher defect, provide a kind of radiating effect better, lighter, the lower-cost LED light fixture of overall weight.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of LED light fixture, comprise shell and be located at the circuit board in described shell, described circuit board comprises the first relative side and the second side, described the first side is provided with some LED illuminators, on described the second side, be coated with magnetic catalyst film, on described magnetic catalyst film, be provided with the first CNT for the heat of described circuit board and the generation of described LED illuminator being carried out to heat loss through radiation, described the first CNT is vertically convexly equipped with on described the second side.
In LED light fixture described in the utility model, described magnetic catalyst film comprises Fe film, Co film or Ni film.
In LED light fixture described in the utility model, described magnetic catalyst film thickness is 2 nanometer～90 nanometers.
In LED light fixture described in the utility model, the diameter of described the first CNT is 2 nanometer～100 nanometers.
In LED light fixture described in the utility model, described the first CNT is array and is located on described magnetic catalyst film.
In LED light fixture described in the utility model, described LED light fixture also comprises the driver of being located in described shell, and described driver is electrically connected with described circuit board.
In LED light fixture described in the utility model, described shell comprises interconnective drain pan and upper cover; In described drain pan, be formed with the first groove and the second groove that are connected, described driver is located in described the first groove, described circuit board is located in described the second groove and described circuit board is positioned at the top of described driver, on described LED illuminator, is also covered with lens; Described upper cover comprises main body and is embedded the glassy layer for printing opacity in described main body; Between described drain pan and described upper cover, be also provided with sealing ring.
In LED light fixture described in the utility model, on the inner layer surface of described drain pan and/or outer layer surface, be also provided with the second CNT, and/or on the inner layer surface of described upper cover and/or outer layer surface, be also provided with the 3rd CNT.
Implement LED light fixture of the present utility model, there is following beneficial effect: on the second side of circuit board, apply magnetic catalyst film, the first CNT is set on magnetic catalyst film, the length direction of the first CNT is perpendicular to the second side, the heat that can make like this circuit board and LED illuminator produce carries out heat loss through radiation by the first CNT, make LED light fixture there is good heat conductivity, and the first CNT also have intensity better, the advantage such as stable chemical nature; Greatly promote the heat dispersion of LED light fixture, and extended the service life of LED light fixture.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the utility model LED light fixture embodiment;
Fig. 2 is the cutaway view along A-A line in Fig. 1;
Fig. 3 is the blast structure chart of Fig. 1;
Fig. 4 is the structural representation of circuit board and LED illuminator in Fig. 2;
Fig. 5 is the partial enlarged drawing at B place in Fig. 4;
In figure:
1-shell; 11-drain pan, 12-upper cover, 13-the first groove, 14-the second groove, 15-lens, 16-main body, 17-glassy layer, 18-sealing ring;
2-circuit board; 21-the first side, 22-the second side;
3-LED illuminator;
4-magnetic catalyst film;
5-the first CNT;
6-driver.
The specific embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing and describe the specific embodiment of the present utility model in detail.
As Figure 1-Figure 5, the LED light fixture of the present embodiment, comprise shell 1 and be located at the circuit board 2 in shell 1, circuit board 2 comprises the first relative side 21 and the second side 22, the first side 21 is provided with some LED illuminators 3, on the second side 22, be coated with magnetic catalyst film 4, on magnetic catalyst film 4, be provided with the first CNT 5 that heat for circuit board 2 and LED illuminator 3 are produced carries out heat loss through radiation, the first CNT 5 is vertically convexly equipped with on the second side 22, is also that the length direction of the first CNT 5 is perpendicular to the second side 22.
Below the structure of the present embodiment is explained.
LED light fixture also comprises the driver 6 of being located in shell 1, and driver 6 is electrically connected with circuit board 2.In drain pan 11, be formed with the first groove 13 and the second groove 14 that are connected, the first groove 13 and the second groove 14 are all shaped in drain pan 11, driver 6 is located in the first groove 13, circuit board 2 is located in the second groove 14 and circuit board 2 is positioned at the top of driver 6, is also covered with lens 15 on LED illuminator 3; Upper cover 12 comprises main body 16 and is embedded the glassy layer 17 for printing opacity in main body 16; Between drain pan 11 and upper cover 12, be also provided with sealing ring 18.
Further:
In general, the size of circuit board 2 is greater than the size of driver 6, Given this, the size of the second groove 14 is greater than the size of the first groove 13, meanwhile, the size of the second groove 14 should be suitable with the size of circuit board 2, and the size of the first groove 13 should be suitable with the size of driver 6.Driver 6 can connect or the mode such as grafting or sealant pouring and sealing is fixed in the first groove 13 by screw fastening; Circuit board 2 can connect or the mode such as grafting is fixed in the second groove 14 by screw fastening.
In certain embodiments, the first concaveconvex structure (not indicating on figure) can be set on the madial wall of the first groove 13, the second concaveconvex structure (not indicating on figure) is set on the lateral wall of driver 6, the first concaveconvex structure and the second concaveconvex structure are pegged graft mutually, can avoid like this rotation of driver 6 in the first groove 13, the stability and the service life that are conducive to improve LED light fixture; Circuit board 2 and the second groove 14 are so same; Other is identical with the present embodiment.
In certain embodiments, on the outer layer surface of drain pan 11, be also provided with fin (not indicating on figure); Fin can be one-body molded with drain pan 11, also can adopt welding or the mode such as be threaded to be fixed on the outer layer surface of drain pan 11; The quantity of fin is multiple, for example, be 10, and 10 fin uniform ring are located on the outer layer surface of drain pan 11, can improve like this radiating effect of drain pan 11.Other is identical with the present embodiment.
In the present embodiment, lens 15 are located on a LED illuminator 3; Circuit board 31 is electrically connected with driver 2.The quantity of LED illuminator 3 is multiple, and the quantity of lens 15 is also multiple, wherein the quantity such as lens 15 and LED illuminator 3.For example, the quantity of LED illuminator 3 is 12, and the quantity of lens 15 is also 12, and the quantity of lens 15 also can be 1 certainly, can adopt Multihead siamesed lens, claims again mating type conjuncted LED lens.Exactly the lens of corresponding lamp luminescence body 3 quantity and position are made into the conjuncted lens of mating type (not shown).One lens 15 are located on a LED illuminator 3, and lens 15 can be arranged on circuit board 2 and be located on corresponding LED illuminator 3 by modes such as bonding, clampings.Lens 15 form the required lighting angle of light fixture for the light that LED illuminator 3 is sent, the light transmission glassy layer 17 that forms required angle is passed to the external world, can provide good illumination condition for people like this, strengthen indoor and outdoor spaces artistic effect and set off the functions such as space atmosphere by contrast, thereby reach, cause the psychological attention of people and association.As utilize the match harmoniouslies such as different light fixtures, lens and outdoor metope, ground, trees, can form various art environments.Strengthen the result of use of LED light fixture.
In the present embodiment, on upper cover 16, be formed with through hole, on the sidewall of through hole, be formed with annular groove, glassy layer 17 is plugged in annular groove.The light transmission glassy layer 17 that LED illuminator 3 sends is passed to the external world.Glassy layer 17 preferably adopts safety glass, can improve like this intensity of glassy layer 17, the service life while using out of doors to improve LED light fixture.
Between drain pan 11 and upper cover 12, sealing ring 18 being set, is because sealing ring 18 can strengthen the sealing of drain pan 11 and upper cover 12 link positions, thus water proofing property and sealing when raising LED light fixture is used out of doors.Sealing ring 18 preferably adopts silica gel sheath.
The diameter of the first CNT 5 is 2 nanometer～100 nanometers; Preferably, the diameter of the first CNT 5 is 30 nanometer～50 nanometers, because now prepare the first CNT 5, is easier to, and efficiency is higher, and the heat loss through radiation effect of the first CNT 5 is better simultaneously; In the present embodiment, the diameter of the first CNT 5 is 40 nanometers, in certain embodiments, the first CNT 5 thickness can be also other numerical value such as 2 nanometers, 15 nanometers, 18 nanometers, 30 nanometers, 35 nanometers, 50 nanometers, 60 nanometers, 70 nanometers, 80 nanometers or 100 nanometers, and other is identical with the present embodiment.
The coaxial pipe of several layers to tens of layers that CNT is mainly comprised of the carbon atom that is hexagonal array forms, keep between layers fixing distance, approximately 0.34 nanometer, CNT has very large draw ratio, thereby its heat exchange performance is alongst very high.CNT has some unique character: tensile strength is 100 times of steel, and density but only has 1/6 of steel; Structure is suitable with graphite flake layer structure, therefore have good heat conductivility; Along its length, heat conductivility the best.Therefore in the present embodiment, the length direction of the first CNT 5 is perpendicular to the second side 22, can reach so good heat loss through radiation effect, compared with the technical scheme that is parallel to the second side 22 with the first CNT 5, the technical scheme of the present embodiment can improve the radiant emissivity of 30-60%, this is conducive to improve the radiating effect of LED light fixture, thereby can improve the service life of LED light fixture.In addition, at 90 ℃, with infrared ray pickup camera observation, have shell 1 radiant emissivity of the first CNT 5 to reach 98%, and cooling rate obviously accelerates, show that CNT has radiation cooling effect.In general, growth has the sample of CNT can lower the temperature more than 6 ℃ than the sample that there is no CNT, can allow like this heat energy of LED light fixture conduct rapidly, and possess the effect that rapid conduction heat energy distributes simultaneously.
Preferably, the first CNT 5 is array to be located on magnetic catalyst film 4, can strengthen like this radiating effect; Spacing between adjacent the first CNT 5 between 2 nanometer to 20 nanometers, empirical tests, the spacing between adjacent the first CNT 5 can reach best radiating effect between 5 nanometer to 8 nanometers time.In the present embodiment, spacing between adjacent the first CNT 5 is 6 nanometers, in certain embodiments, spacing between adjacent the first CNT 5 can be also other numerical value such as 2 nanometers, 4 nanometers, 5 nanometers, 6 nanometers, 8 nanometers, 10 nanometers, 15 nanometers or 200 nanometers, and other is identical with the present embodiment.
In certain embodiments, on the inner layer surface of drain pan 11 and/or outer layer surface, be also provided with the second CNT, and/or on the inner layer surface of upper cover 12 and/or outer layer surface, be also provided with the 3rd CNT.For example, the inner layer surface of drain pan 11 is provided with the second CNT; Or the inner layer surface of upper cover 12 is provided with the 3rd CNT; Or the inner layer surface of drain pan 11 is provided with the second CNT, the inner layer surface of upper cover 12 is provided with the 3rd CNT; Or the outer layer surface of drain pan 11 is provided with the second CNT; Or the outer layer surface of upper cover 12 is provided with the 3rd CNT; Or the outer layer surface of drain pan 11 is provided with the second CNT, the outer layer surface of upper cover 12 is provided with the 3rd CNT.It should be noted that, the first CNT 5, the second CNT and the 3rd CNT of the present embodiment are in fact all CNTs, we are just in order to express easily with clear, so add " first ", " second " and " the 3rd " before CNT.Therefore, the situation of the second CNT and the 3rd CNT is identical with the situation of the first above-mentioned CNT 5, does not repeat them here.
The preparation method who narrates the LED light fixture of the present embodiment below, comprises the following steps:
S1: deposit magnetic catalyst film 4 on the second side 22 of circuit board 2; For example can adopt the method for magnetron sputtering deposition to deposit magnetic catalyst film 4 on the second side 22, the method for magnetron sputtering deposition adopts conventional magnetron sputtering deposition method in prior art.
S2: circuit board 2 is put into reacting furnace, in reacting furnace, pass into the air in inert gas discharge reacting furnace, then the etching of annealing magnetic catalyst film 4, introduce again carbon-source gas, add back bias voltage, make carbon-source gas ionization produce plasma, plasma deposits and forms the first CNT 5 being vertically convexly equipped with on the second side 22 on magnetic catalyst film 4;
S3: circuit board 2 is packed in shell 1, and encapsulation obtains LED light fixture.
Preferably, the method that adopts chemical vapour deposition technique applying plasma to strengthen chemical vapour deposition (CVD) (PECVD) is prepared the first CNT 5 on the second side 22.Because plasma itself is with certain energy, can make the temperature of reacting required greatly reduce.Under low temperature carbon-source gas decompose complete not, carbon source is under-supply, carbon pipe be difficult for form.Temperature is higher, and carbon-source gas divides and solves sooner, and the carbon source that can provide is also just more, is enough to form graphite linings and forms CNT.The effect that adopts PECVD to allow CNT determine direction growth has two: because circuit board 2 surfaces exist back bias voltage, direction of an electric field is perpendicular to circuit board 2, easy induced carbon nanotube oriented growth; The plasma producing bombards perpendicular to circuit board 2, and the CNT non-perpendicular to substrate grown is etched away, and guarantees carbon nano-tube oriented growth.The direction of growth that the direction of transfer of guaranteeing light fixture heat is CNT.
Due to etching and the inducing action of plasma, CNT is along the direction growth perpendicular to substrate, thus the carbon nano pipe array of acquisition oriented growth.Because plasma itself is with energy, so that the feature of the method is carbon pipe growth temperature required in technique is lower, thereby for can be in the substrates such as glass carbon nano tube array grows provide may.
Certainly, the preparation method of the LED light fixture of the present embodiment is also included in the interior installation of driver 6 of drain pan 11, connects the steps such as driver 6 and circuit board 2, encapsulation drain pan 11 and upper cover 12, and these steps are step conventional in prior art, do not repeat them here.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (8)
1. a LED light fixture, comprise shell (1) and be located at the circuit board (2) in described shell (1), described circuit board (2) comprises relative the first side (21) and the second side (22), described the first side (21) is provided with some LED illuminators (3), it is characterized in that, on described the second side (22), be coated with magnetic catalyst film (4), on described magnetic catalyst film (4), be provided with the first CNT (5) for the heat of described circuit board (2) and described LED illuminator (3) generation being carried out to heat loss through radiation, described the first CNT (5) is vertically convexly equipped with on described the second side (22).
2. LED light fixture according to claim 1, is characterized in that, described magnetic catalyst film (4) comprises Fe film, Co film or Ni film.
3. LED light fixture according to claim 2, is characterized in that, described magnetic catalyst film (4) thickness is 2 nanometer～90 nanometers.
4. LED light fixture according to claim 1, is characterized in that, the diameter of described the first CNT (5) is 2 nanometer～100 nanometers.
5. LED light fixture according to claim 1, is characterized in that, described the first CNT (5) is array and is located on described magnetic catalyst film (4).
6. LED light fixture according to claim 1, is characterized in that, described LED light fixture also comprises the driver (6) of being located in described shell (1), and described driver (6) is electrically connected with described circuit board (2).
7. LED light fixture according to claim 6, is characterized in that, described shell (1) comprises interconnective drain pan (11) and upper cover (12); In described drain pan (11), be formed with the first groove (13) and the second groove (14) that are connected, described driver (6) is located in described the first groove (13), described circuit board (2) is located in described the second groove (14) and described circuit board (2) is positioned at the top of described driver (6), is also covered with lens (15) on described LED illuminator (3); Described upper cover (12) comprises main body (16) and is embedded the glassy layer (17) for printing opacity in described main body (16); Between described drain pan (11) and described upper cover (12), be also provided with sealing ring (18).
8. LED light fixture according to claim 7, is characterized in that, on the inner layer surface of described drain pan (11) and/or outer layer surface, is also provided with the second CNT, and/or is also provided with the 3rd CNT on the inner layer surface of described upper cover (12) and/or outer layer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320787102.3U CN203549522U (en) | 2013-11-27 | 2013-11-27 | Led lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320787102.3U CN203549522U (en) | 2013-11-27 | 2013-11-27 | Led lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203549522U true CN203549522U (en) | 2014-04-16 |
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ID=50467633
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320787102.3U Expired - Fee Related CN203549522U (en) | 2013-11-27 | 2013-11-27 | Led lamp |
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| CN (1) | CN203549522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676308A (en) * | 2013-11-27 | 2015-06-03 | 深圳市达特照明股份有限公司 | LED (Light Emitting Diode) lamp and preparation method thereof |
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2013
- 2013-11-27 CN CN201320787102.3U patent/CN203549522U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676308A (en) * | 2013-11-27 | 2015-06-03 | 深圳市达特照明股份有限公司 | LED (Light Emitting Diode) lamp and preparation method thereof |
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