CN103322434A - LED lamp - Google Patents
LED lamp Download PDFInfo
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- CN103322434A CN103322434A CN2012100758782A CN201210075878A CN103322434A CN 103322434 A CN103322434 A CN 103322434A CN 2012100758782 A CN2012100758782 A CN 2012100758782A CN 201210075878 A CN201210075878 A CN 201210075878A CN 103322434 A CN103322434 A CN 103322434A
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Abstract
The invention provides an LED (Light-Emitting Diode) lamp. An LED substrate and an LED light source of the lamp are sealed in a first sealing cavity formed by the inner surface of an inner seal cover and the top of the substrate, heat dissipation liquid is filled in a second seal cavity formed by the inner surface of an outer light distribution cover, the outer surface of a substrate seat and the outer surface of the inner seal cover, and the inner seal cover, the outer light distribution cover or the heat dissipation liquid is provided with fluorescent powder. Heat generated by light emitting due to PN junction excitation is quickly transferred to the heat dissipation liquid through the substrate in tight connection with the LED substrate, light emitted by the PN junction excitation is directly transferred to the heat dissipation liquid through heat generated by required light transformed by fluorescent powder, and through the convection of the heat dissipation liquid, heat is transferred to the light distribution cover to achieve the heat dissipation effect. The heat generated when the LED lamp is in operation is dissipated through two ways, so that the heat dissipation effect is improved, and the service life of the LED lamp is favorable for being prolonged.
Description
Technical field
The present invention relates to a kind of led lamp, be specifically related to a kind of led lamp of liquid cooling.
Background technology
LED (Light Emitting Diode, light emitting diode) is a kind of semiconductor devices that can directly be converted into electricity visible light.The LED light fixture has the advantage of energy-saving and environmental protection, has become main trend in the development of light fixture industry.But the height of LED operating temperature directly has influence on the life-span of LED, and temperature is lower, and the life-span is longer, and this is so that the heat dissipation design of LED light fixture is very important.The white light LED lamp of using take the illumination aspect is as example, and the heat that produces during the work of LED light fixture is mainly from two aspects: the heat that produces when PN junction excites blue light; Blue light changes into the heat of generating white light by fluorescent material.
The LED strip lamp structure chart of prior art as shown in Figure 1, this light fixture mainly comprises electric connector (not shown), led light source 1, LED substrate 2, light distributing cap 3, driver 4, hollow inner bag 5, cavity 6 and lamp socket (not shown).Described electric connector is arranged at the two ends of LED strip lamp, and the outside is connected with civil power, and inside links to each other with the input of driver 4; Be full of the cooling fluid of high heat dispersion in the cavity 6 that the inboard of the outside of described hollow inner bag 5 and light distributing cap 3 forms, described driver 4 is arranged in the cavity of hollow inner bag 5, described led light source 1 is arranged on the LED substrate 2, described led light source 1 and LED substrate 2 are arranged in the described light distributing cap 3, are immersed in the described cooling fluid.Change the white light that needs into for the blue light that led light source is produced, need to the fluorescent material that blue light is changed into white light be set at led light source.The light-source structure that fluorescent material is set at led light source is referring to Fig. 2, and the PN junction 10 of led light source is connected on the LED substrate by welding pin 11, and PN junction 10 is covered by fluorescent material 13, is coated with silica gel 14 in the fluorescent material outside.Described fluorescent material changes the blue light that PN junction sends into white light.The heat of the heat of the luminous generation of led light source and fluorescent material 13 luminous generations conducts on the LED substrate by the heat dissipation bonding pad 12 that is arranged on PN junction 10 belows, the cooling fluid (for example, water, heat-transfer oil, deionized water or ethylene glycol solution etc.) of the high heat dispersion in the cavity 6 leaves the heat on the LED substrate 2.
But, in the LED strip lamp of prior art, described LED substrate directly is immersed in the cooling fluid, the heat that the heat that produces when led light source 1 sends blue light in the LED light fixture and blue light change into generating white light mainly is delivered to cooling fluid by the LED substrate and leaves, the heat radiation approach is single, and radiating effect is undesirable.
In addition, because cooling fluid generally has certain corrosivity, so that be immersed in LED substrate in the cooling fluid and the chip on the LED substrate easily is corroded, affect the life-span of LED light fixture.
Summary of the invention
The object of the invention is to, a kind of led lamp is provided, can solve better the heat dissipation problem of LED light fixture.
For achieving the above object, the invention provides a kind of led lamp, comprising: LED substrate, led light source, substrate holder, outer light distributing cap, inner seal cover, wherein,
Described LED substrate is arranged on described substrate holder top, and described led light source is arranged on the described LED substrate;
Described inner seal cover is arranged on the top of described substrate holder, and the inner surface of described inner seal cover and the top of described substrate holder consist of the first sealed cavity, and described LED substrate and led light source are sealed in described the first sealed cavity;
Described outer light distributing cap is arranged on the outside of described substrate holder, and the outer surface of the inner surface of described outer light distributing cap, the outer surface of described substrate holder and described inner seal cover forms the second sealed cavity, is full of cooling fluid in described the second sealed cavity;
Described inner seal cover, outer light distributing cap or cooling fluid have fluorescent material.
Preferably, the surface spraying of described inner seal cover or outer light distributing cap has fluorescent material.
Preferably, described fluorescent material is evenly distributed in the material of described inner seal cover or outer light distributing cap.
Preferably, described fluorescent material is dispersed in the described cooling fluid.
Preferably, described light fixture also comprises the 3rd cavity, connecting piece of lamp cap and lamp socket, wherein
Described connecting piece of lamp cap links to each other with lamp socket;
Described substrate holder is threaded with described connecting piece of lamp cap, and described substrate holder outer bottom, connecting piece of lamp cap, lamp socket consist of the 3rd cavity.
Preferably, the driver that comprises described led light source in described the 3rd cavity.
Preferably, described outer light distributing cap has fluorescent material, and described inner seal cover is a light-distribution lens.
Preferably, between described LED substrate and the substrate holder heat-conducting medium is set.
Wherein, described heat-conducting medium is heat-conducting plate or heat conducting coating.
Preferably, there is bubble in described the second cavity.
Compared with prior art, LED light fixture of the present invention has following advantages:
In the LED light fixture of the present invention, described LED base plate seals is in the first sealed cavity of described inner seal cover inner surface and substrate holder top formation, the outer surface that described cooling fluid is filled in by the outer surface of the inner surface of outer light distributing cap, substrate holder and inner seal cover forms in the second sealed cavity, and described inner seal cover, outer light distributing cap or cooling fluid have fluorescent material.Being arranged on like this fluorescent material of inner seal cover, outer light distributing cap or cooling fluid and led light source divides and is arranged, the heat that the PN junction stimulated luminescence of led light source produces is by reaching rapidly cooling fluid with the close-connected substrate holder of LED substrate, the heat that light-emitting phosphor produces directly reaches described cooling fluid, the again convection current by described cooling fluid, heat is reached outer light distributing cap, reach radiating effect.The heat that produces during LED light fixture work of the present invention sheds by two approach, has improved radiating effect, is conducive to prolong the life-span of LED light fixture.
In addition, the LED substrate is positioned at different sealed cavities with chip on the LED substrate from cooling fluid, therefore when cooling fluid is selected, needn't consider the etching problem of cooling fluid again, the liquid that only needs to select good heat dispersion performance is as cooling fluid, and the selectance of described cooling fluid is higher.
Description of drawings
By the more specifically explanation of the preferred embodiments of the present invention shown in the accompanying drawing, above-mentioned and other purpose of the present invention, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawings is indicated identical part.Deliberately do not draw accompanying drawing by actual size equal proportion convergent-divergent, focus on illustrating purport of the present invention.
Fig. 1 is the structural representation of the middle bar shape LED lamp of prior art;
Fig. 2 is the light-source structure schematic diagram that fluorescent material is set on the led light source of prior art
Fig. 3 is the explosive view of the ball bubble shape LED light fixture of the embodiment of the invention one;
Fig. 4 is the cross-sectional schematic of the ball bubble shape LED light fixture of the embodiment of the invention one;
Fig. 5 and Fig. 6 are the cross-sectional schematic of the ball bubble shape LED light fixture of the embodiment of the invention one when having bubble;
Fig. 7 is the cross-sectional schematic of the flame-shaped LED light fixture of the embodiment of the invention two;
Fig. 8 is the cross-sectional schematic of hemispherical LED light fixture in the embodiment of the invention;
Fig. 9 is the bar shape LED lamp schematic cross-section of the embodiment of the invention three.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Secondly, the present invention is described in detail in conjunction with schematic diagram, and when the embodiment of the invention was described in detail in detail, for ease of explanation, described schematic diagram was example, and it should not limit the scope of protection of the invention at this.
Just as stated in the Background Art, the heat that produces is from two aspects: the heat that produces during led light source PN junction stimulated luminescence LED strip lamp when work; PN junction excites the light of generation to change into the heat of the light generation that needs by fluorescent material.Can claim that the PN junction stimulated luminescence is the first luminescence process, it is the second luminescence process that PN junction excites the light of generation to change into the light that needs by fluorescent material, and two luminescence process all can produce a large amount of heats.Existing LED strip lamp adopts the LED substrate and coats the led light source that contains fluorescent material and silica gel and all is immersed in mode in the cooling fluid heat that sheds, and in the heat dissipation technology of this LED light fixture, the heat radiation approach is single, and radiating effect is undesirable.In addition, corrosive cooling fluid may corrode the chip on LED substrate and the LED substrate, can affect the life-span of LED light fixture.In order to improve the heat dissipation problem of LED light fixture, the invention provides a kind of led lamp, its technical scheme is: with led light source and LED base plate seals in cavity, the heat that the first luminescence process of LED lamp luminescence is produced is delivered in the cooling fluid by substrate holder, the second luminescence process is comprising that the inner seal cover of fluorescent material, outer light distributing cap or cooling fluid carry out, and the heat of generation is directly delivered to cooling fluid.Like this, the heat of led lamp of the present invention is passed to cooling fluid by two kinds of approach, is conducive to the heat radiation of LED light fixture.
Concrete, led lamp of the present invention comprises: the LED substrate, be arranged on led light source, substrate holder, outer light distributing cap, inner seal cover on the LED substrate, wherein,
Described LED substrate is arranged on described substrate holder top, and described led light source is arranged on the LED substrate;
Described inner seal cover is arranged on the top of described substrate holder, and the inner surface of described inner seal cover and the top of described substrate holder consist of the first sealed cavity, and described LED substrate light source is sealed in described the first sealed cavity;
Described outer light distributing cap is arranged on the outside of described substrate holder, and the outer surface of the inner surface of described outer light distributing cap, the outer surface of described substrate holder and described inner seal cover forms the second sealed cavity, is full of cooling fluid in described the second sealed cavity;
Described inner seal cover, outer light distributing cap or cooling fluid have fluorescent material.
Led lamp of the present invention, adopted Remote phosphor technology, divide and be arranged being arranged on the fluorescent material of inner seal cover, outer light distributing cap or cooling fluid and led light source, making the heat of the luminous generation of led light source be transmitted to cooling fluid by substrate holder dispels the heat, the heat of the luminous generation of fluorescent material dispels the heat by cooling fluid, is conducive to the heat radiation of LED light fixture.
In addition, described LED substrate and led light source are sealed in the first sealed cavity of described inner seal cover inner surface and substrate holder top formation, and described cooling fluid is filled in by the inner surface of outer light distributing cap, the outer surface of substrate holder and the outer surface of inner seal cover and forms in the second sealed cavity, like this with the chip on LED substrate and the LED substrate from described cooling fluid is arranged on different sealed cavities, prevented the corrosion of cooling fluid to the chip on LED substrate and the LED substrate.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the below describes in detail technical solution of the present invention with the specific embodiment by reference to the accompanying drawings take ball bubble shape LED light fixture as example.
Embodiment one:
With reference to Fig. 3 and Fig. 4, be respectively explosive view and the cross-sectional schematic of the ball bubble shape LED light fixture of the embodiment of the invention one.
In conjunction with Fig. 3 and shown in Figure 4, the ball of the embodiment of the invention one bubble shape LED light fixture comprises: led light source 20, LED substrate 21, substrate holder 22, outer light distributing cap 23, inner seal cover 24, connecting piece of lamp cap 25, lamp holder 26 and driver 27.The outer surface of inner seal cover 24 is coated with fluorescent material, and inner seal cover 24 is hemispherical, and outer light distributing cap 23 is ball bubble shape.
The inner seal cover 24 of sprayed with fluorescent powder is arranged on the top of substrate holder 22, the top of the inner surface of described inner seal cover 24 and substrate holder 22 consists of the first sealed cavity 201, LED substrate 21 and led light source 20 are sealed in described the first sealed cavity 201, and the mode that adopts riveted joint, welds or paste is close to the top of substrate holder 22.
Outer light distributing cap 23 is arranged on the outside of substrate holder 22, and the outer surface of the inner surface of described outer light distributing cap 23, substrate holder 22 and the outer surface of inner seal cover 24 form the second sealed cavity 202, is full of the cooling fluid with high-cooling property in described the second sealed cavity 202.
Described connecting piece of lamp cap 25 links to each other with lamp socket 26, and described substrate holder 22 is threaded with described connecting piece of lamp cap 25; Described substrate holder 22 inner surfaces, connecting piece of lamp cap 25, lamp socket 26 consist of the 3rd cavity 203, and described driver 27 places in described the 3rd cavity 203.
Need to prove, it is luminous that described driver 27 is used for driving LED light source 20, in other embodiments of the invention, the led light source 20 that adopts civil power to drive, the LED light fixture can not comprise driver 27.In addition, in the LED light fixture of the present embodiment, the outer surface of inner seal cover 24 is sprayed with fluorescent powder not, and at the inner surface sprayed with fluorescent powder of inner seal cover 24, for example inner seal cover 24 adopts plastics or glass, blue light is converted into the fluorescent material of white light in the inner surface spraying of inner seal cover.
In the embodiment of the invention, adopt Remote phosphor technology, the surface spraying of inner seal cover 24 has fluorescent material, the LED substrate 21 of described ball bubble shape LED light fixture is sealed in the first sealed cavity 201 of described inner seal cover 24 inner surfaces and substrate holder 22 tops formation, and described cooling fluid is filled in by the inner surface of outer light distributing cap 23, the outer surface of substrate holder 22 and the outer surface of inner seal cover 24 and forms in the second sealed cavity 202.In the embodiment of the invention, substrate holder 22 has good thermal conductivity.Like this, the heat that the first luminescence process PN junction stimulated luminescence produces is by reaching rapidly described cooling fluid with LED substrate 21 close-connected substrate holder 22, the second luminescence process PN junction excites the light of generation directly to reach described cooling fluid by the heat that fluorescent material changes into the light generation that needs, the again convection current by described cooling fluid, heat is reached outer light distributing cap 23, reach radiating effect.The heat that the ball bubble shape LED light fixture of the present embodiment produces when working sheds by two approach, has improved radiating effect, is conducive to prolong the life-span of ball bubble shape LED light fixture.
In addition, in the embodiment of the invention, because described LED substrate 21 and led light source 20 no longer are immersed in the described cooling fluid, therefore when cooling fluid is selected, needn't consider again that cooling fluid can consist of to LED substrate 21 problem of corrosion, the liquid that only needs to select good heat dispersion performance is as cooling fluid, and the selectance of described cooling fluid is higher.For example, can select the water of perfect heat-dissipating and less expensive as cooling fluid, not only be easy to realization but also can well realize radiating effect.
Preferably, can add heat-conducting medium between LED substrate 21 and the substrate holder 22, strengthen the heat conduction between LED substrate 21 and the substrate holder 22.Described heat-conducting medium can be heat-conducting plate, and described heat-conducting plate is between the top of the bottom of LED substrate 21 and substrate holder 22.Described heat-conducting medium can also be heat conducting coating, and described heat conducting coating spreads upon between the top of the bottom of LED substrate 21 and substrate holder 22.
In the embodiment of the invention, described inner seal cover 24 adopts with substrate holder 22 and is threaded.In order to reach better sealing effectiveness, prevent that described cooling fluid from infiltrating in the first sealed cavity 201, inner seal cover 24 adopts fluid sealant to seal with the junction of substrate holder 22.
In the embodiment of the invention, cooling fluid is colourless transparent liquid.When led light source 20 luminous shining on the inner seal cover 24, the light that the fluorescent material of inner seal cover 24 is launched led light source is converted into the light time of actual needs, light can enter and pass transparent cooling fluid, liquid luminous intensity distribution by described cooling fluid, more even when the light that the LED light fixture is sent passes outer light distributing cap 23, improve light efficiency.
Preferably, described inner seal cover 24 can adopt with LED substrate 21 optics on the light-distribution lens that matches, described light-distribution lens can carry out once light-distribution to light.Light enters described cooling fluid again and carries out secondary light-distribution through behind the once light-distribution of described light-distribution lens, make like this pass outer light distributing cap light more evenly or light more concentrated.
Because liquid has certain coefficient of expansion, so can expand after cooling fluid is heated.For described the second sealed cavity 202, fill full cooling fluid in it, behind described cooling fluid expanded by heating, may cause breaking of outer light distributing cap 23.Therefore, in the practical application, with reference to Fig. 4, in the process of the described cooling fluid of the second sealed cavity 202 interior fillings, can be at a certain size bubble 28 of described the second sealed cavity 202 interior reservations, the cutaway view when having bubble 28 for the embodiment of the invention one ball bubble shape LED light fixture.The existence of described bubble can so that when described cooling fluid expanded by heating, have certain space to hold the liquid of expansion, prevent breaking of outer light distributing cap 23 effectively.
But the position of described bubble 28 is difficult to fixing, and as shown in Figure 5, bubble 28 is positioned at the top of the second sealed cavity 202.When the led light source 20 on the LED substrate 21 was luminous, light hot spot occur through penetrating outer light distributing cap 23 behind the bubble 28, understanding in range of exposures.In order to prevent the problems referred to above, with reference to Fig. 6, in described the second sealed cavity 202, below described substrate holder 22 and described outer light distributing cap 23 junctions, increase baffle plate 29, the outer surface of the edge of described baffle plate 29 and substrate holder 22 has certain distance, this distance is fixed on the position of described bubble 28 bottom of the second sealed cavity 202 so that described substrate holder 22 consists of packing less narrow and small zone with described baffle plate 29.Because described substrate holder 22 is not the light out part of LED light fixture with the below of described outer light distributing cap 23 junctions, does not have light to send from this, so that the existence of bubble 28 can not produce hot spot.
The shape of LED light fixture of the present invention is not limited to ball bubble shape, also can adopt flame-shaped.
Embodiment two:
Referring to Fig. 7, the cross-sectional schematic for the flame-shaped LED light fixture of the present embodiment comprises: led light source 30, LED substrate, substrate holder 31, outer light distributing cap 32, inner seal cover 33, lamp holder 35, connecting piece of lamp cap 36 and driver 37.Inner seal cover 24 is flame-shaped, and outer light distributing cap 23 is flame-shaped.Inner seal cover 33 has fluorescent material, and special, fluorescent material is evenly distributed in the material of inner seal cover fluorescent material with material moulding such as plastics or glass.
The LED substrate is arranged on the substrate holder 31, and two led light sources 30 are fixed on the LED substrate.Fix two led light sources at the LED substrate in the present embodiment, also can adopt one or more led light source.
Outer light distributing cap 32 is arranged on the outside of substrate holder 31, and the outer surface of the inner surface of described outer light distributing cap 32, substrate holder 31 and the outer surface of inner seal cover 33 form the second sealed cavity 34, is full of the cooling fluid with high-cooling property in described the second sealed cavity 34.
In the present embodiment, adopt remote phosphor technology, the material of inner seal cover 33 comprises fluorescent material, the LED base plate seals of described flame-shaped LED light fixture is in the first sealed cavity of described inner seal cover 33 inner surfaces and substrate holder 31 tops formation, and the outer surface that described cooling fluid is filled in by the outer surface of the inner surface of outer light distributing cap 32, substrate holder 31 and inner seal cover 33 forms in the second sealed cavity 34.In the embodiment of the invention, substrate holder 31 has good thermal conductivity.Like this, the heat that the first luminescence process PN junction stimulated luminescence produces is by reaching rapidly described cooling fluid with the close-connected substrate holder 31 of LED substrate, the second luminescence process PN junction excites the light of generation directly to reach described cooling fluid by the heat that fluorescent material changes into the light generation that needs, the again convection current by described cooling fluid, heat is reached outer light distributing cap 23, reach radiating effect.The heat that produces when the flame-shaped LED light fixture of the present embodiment is worked sheds by two approach, has improved radiating effect, is conducive to prolong the life-span of flame-shaped LED light fixture.
In the present embodiment, it is luminous that described driver 37 is used for driving LED light source 30, in other embodiments of the invention, the led light source 30 that adopts civil power to drive, the LED light fixture can not comprise driver 37.
Preferably, also can add heat-conducting medium between LED substrate and the substrate holder 31, strengthen the heat conduction between LED substrate and the substrate holder.
Preferably, in the cooling fluid of the second sealed cavity 34 interior fillings, keep a certain size bubble, prevent from behind described cooling fluid expanded by heating, causing breaking of outer light distributing cap 32.Preferably, bubble is positioned at the described substrate holder 31 of above-mentioned the second cavity and the below of described outer light distributing cap 32 junctions, and the existence of bubble can not produce hot spot.
Outer light distributing cap and the inner seal cover of LED light fixture of the present invention are not limited to flame-shaped, also can be hemispherical, referring to Fig. 8, form hemispherical LED light fixture.
In the another embodiment of the present invention, outer light distributing cap has fluorescent material, and inner seal cover is not for having the transparent body of fluorescent material.When led light source was luminous, light can pass transparent inner seal cover, entered described cooling fluid, and is more even when the light that LED substrate light source is sent passes outer light distributing cap by the liquid luminous intensity distribution of described cooling fluid, improves light efficiency.Described inner seal cover can adopt with LED substrate optics on the light-distribution lens that matches, described light-distribution lens can carry out once light-distribution to light.Light enters described cooling fluid again and carries out secondary light-distribution through behind the once light-distribution of described light-distribution lens, makes like this light that passes outer light distributing cap more even.
In addition, in order to adapt to different functional needs, the shape of vacuum liquid cooling LED lamp of the present invention also can be bar shaped.
Embodiment three:
Referring to Fig. 9, be the bar shape LED lamp schematic cross-section of the present embodiment.This bar shape LED lamp mainly comprises: led light source 60, LED substrate 61, substrate holder 62, outer light distributing cap 63, inner seal cover 64 and driver 65.Inner seal cover 64 can be the semicircular cylinder shape, and outer light distributing cap 23 can be for cylindric.
LED substrate 61 is arranged on the basic seat 62, and one or more led light sources 60 are welded on the described LED substrate 61.
Inner seal cover 64 is arranged on the top of substrate holder 62, and the top of the inner surface of described inner seal cover 64 and substrate holder 62 consists of the first sealed cavity 601, and described LED substrate 61 is sealed in described the first sealed cavity 601, is close to the top of substrate holder 62.
Outer light distributing cap 63 is arranged on the outside of substrate holder 62, and the outer surface of the inner surface of described outer light distributing cap 63, substrate holder 62 and inner seal cover 64 outer surfaces form the second sealed cavity 602, is full of the cooling fluid with high-cooling property in described the second sealed cavity 602; Have fluorescent material in the described cooling fluid, described fluorescent material is dispersed in the described cooling fluid; Described driver 65 is positioned at the 3rd sealed cavity 603 that described substrate holder 62 inner surfaces consist of.
In the embodiment of the invention, described LED substrate 61 is close to substrate holder 62 tops, specifically can adopt riveted joint, welding, bonding method.Preferably, can add heat-conducting medium between LED substrate 61 and the substrate holder 62, strengthen the heat conduction between LED substrate 61 and the substrate holder 62.Concrete, heat-conducting medium can be heat-conducting plate or heat conducting coating.
In order to prevent that described cooling fluid expanded by heating from causing outer light distributing cap to break, in the second sealed cavity 602 of the described bar shape LED lamp of the present embodiment, also can keep a certain size bubble.But when the position of described bubble not during circumscribed, may in range of exposures, produce hot spot.Do not affect the illuminating effect of LED light fixture for bubble, bubble can be fixed on the bottom of aforesaid substrate seat 62.With reference to Fig. 8, in described the second sealed cavity 602, below described substrate holder 62 and described inner seal cover 64 junctions, increase baffle plate 67, described baffle plate 67 consists of packing less narrow and small zone with described substrate holder 62, the position of bubble 66 is fixed on the bottom of the second sealed cavity 602, so that described bubble 66 is constrained in the described narrow and small zone.Because described substrate holder 62 is not the light out part of LED light fixture with the below of described inner seal cover 64 junctions, does not have light to send from this, so that the existence of described bubble 66 can not produce hot spot.
In the present embodiment, has fluorescent material in the cooling fluid, the LED base plate seals of described strip-shaped LED lamp tool is in the first sealed cavity 601 of described inner seal cover 64 inner surfaces and substrate holder 62 tops formation, and the outer surface that described cooling fluid is filled in by the outer surface of the inner surface of outer light distributing cap 63, substrate holder 62 and inner seal cover 64 forms in the second sealed cavity 602.In the embodiment of the invention, substrate holder 62 has good thermal conductivity.Like this, the heat that the first luminescence process PN junction stimulated luminescence produces is by reaching rapidly described cooling fluid with the close-connected substrate holder 31 of LED substrate, the second luminescence process PN junction excites the light of generation directly to reach described cooling fluid by the heat that fluorescent material changes into the light generation that needs, the again convection current by described cooling fluid, heat is reached outer light distributing cap 23, reach radiating effect.The heat that produces when the bar shape LED lamp of the present embodiment is worked sheds by two approach, has improved radiating effect, is conducive to prolong the life-span of flame-shaped LED light fixture.
In addition, in the present embodiment, the LED substrate 61 of described bar shape LED lamp is sealed in described the first sealed cavity 601, described cooling fluid is filled in described the second sealed cavity 602, LED substrate 61 and described cooling fluid reach the effect of isolation like this, so that LED substrate 61 no longer is immersed in the described cooling fluid, prevented thus the corrosion of cooling fluid to LED substrate 61, prevented that simultaneously cooling fluid from penetrating in the chip on the LED substrate 61.Therefore, when cooling fluid was selected, the liquid that only needs to select good heat dispersion performance need not be considered corrosive height of this liquid again as cooling fluid, and the selectance of described cooling fluid is higher.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs to the scope of technical solution of the present invention protection.
Claims (10)
1. a led lamp is characterized in that, comprising: LED substrate, led light source, substrate holder, outer light distributing cap, inner seal cover, wherein,
Described LED substrate is arranged on described substrate holder top, and described led light source is arranged on the described LED substrate;
Described inner seal cover is arranged on the top of described substrate holder, and the inner surface of described inner seal cover and the top of described substrate holder consist of the first sealed cavity, and described LED substrate and led light source are sealed in described the first sealed cavity;
Described outer light distributing cap is arranged on the outside of described substrate holder, and the outer surface of the inner surface of described outer light distributing cap, the outer surface of described substrate holder and described inner seal cover forms the second sealed cavity, is full of cooling fluid in described the second sealed cavity;
Described inner seal cover, outer light distributing cap or cooling fluid have fluorescent material.
2. led lamp according to claim 1 is characterized in that, the surface spraying of described inner seal cover or outer light distributing cap has fluorescent material.
3. led lamp according to claim 1 is characterized in that, described fluorescent material is evenly distributed in the material of described inner seal cover or outer light distributing cap.
4. led lamp according to claim 1 is characterized in that, described fluorescent material is dispersed in the described cooling fluid.
5. according to claim 1 to 4 each described led lamps, it is characterized in that, described light fixture also comprises the 3rd cavity, connecting piece of lamp cap and lamp socket, wherein
Described connecting piece of lamp cap links to each other with lamp socket;
Described substrate holder is threaded with described connecting piece of lamp cap, and described substrate holder outer bottom, connecting piece of lamp cap, lamp socket consist of the 3rd cavity.
6. led lamp according to claim 5 is characterized in that, comprises the driver of described led light source in described the 3rd cavity.
7. led lamp according to claim 1 is characterized in that, described outer light distributing cap has fluorescent material, and described inner seal cover is a light-distribution lens.
8. according to claim 1 to 4 each described led lamps, it is characterized in that, between described LED substrate and the substrate holder heat-conducting medium is set.
9. led lamp according to claim 8 is characterized in that, described heat-conducting medium is heat-conducting plate or heat conducting coating.
10. according to claim 1 to 4 each described led lamps, it is characterized in that, have bubble in described the second cavity.
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| CN2012100758782A CN103322434A (en) | 2012-03-20 | 2012-03-20 | LED lamp |
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| CN2012100758782A CN103322434A (en) | 2012-03-20 | 2012-03-20 | LED lamp |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377194A (en) * | 2014-11-17 | 2015-02-25 | 深圳市裕富照明有限公司 | LED lamp filament, LED bulb and lamp |
| CN104791736A (en) * | 2014-01-22 | 2015-07-22 | 四川新力光源股份有限公司 | Liquid cooling LED optical module |
| CN109210481A (en) * | 2018-10-22 | 2019-01-15 | 宁波阳铭星光电子科技有限公司 | LED flame lamp |
| CN110067947A (en) * | 2019-05-14 | 2019-07-30 | 深圳和而泰智能控制股份有限公司 | Light emitting device |
| CN110081377A (en) * | 2019-04-29 | 2019-08-02 | 广州大学 | A kind of LED lamp of variable light source color |
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| CN104791736A (en) * | 2014-01-22 | 2015-07-22 | 四川新力光源股份有限公司 | Liquid cooling LED optical module |
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| CN110081377A (en) * | 2019-04-29 | 2019-08-02 | 广州大学 | A kind of LED lamp of variable light source color |
| CN110067947A (en) * | 2019-05-14 | 2019-07-30 | 深圳和而泰智能控制股份有限公司 | Light emitting device |
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