CN103812385A - Lamp power source and illuminating system comprising same - Google Patents
Lamp power source and illuminating system comprising same Download PDFInfo
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- CN103812385A CN103812385A CN201210455350.8A CN201210455350A CN103812385A CN 103812385 A CN103812385 A CN 103812385A CN 201210455350 A CN201210455350 A CN 201210455350A CN 103812385 A CN103812385 A CN 103812385A
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Abstract
The invention discloses a lamp power source and an illuminating system comprising same. The lamp power source comprises a thermal storage portion (3) which is provided with phase changing materials (4) and a thermoelectric generator (5) which is provided with a thermal side (51) which is in thermal communication with the phase changing materials (4) of the thermal storage portion (3) and a cold side (52) which is opposite to the thermal side (51); the thermoelectric generator (5) generates electric energy according to the temperature difference of the thermal side (51) and the cold side (52). The lamp power source and the illuminating system comprising the same achieve stable and efficient power supply through utilization of renewable energy with low costs.
Description
Technical field
The present invention relates to a kind of power supply for light fixture and there is the illuminator of this power supply.
Background technology
LED light fixture is as a kind of new light sources, due to its have efficiency high, photochromic pure, energy consumption is low, the life-span is long, reliability and durability, pollution-free, control the advantages such as flexible, thereby be widely applied.
In LED light fixture, LED receives electric energy and luminous, thereby produces heat.In order to receive electric energy, conventional scheme is that LED light fixture is linked in electrical network now, or is LED light fixture outfit battery.
But be sometimes difficult to obtain the power supply of this form.For example, in the time there is natural calamity, power line is destroyed, and also buys less than battery.Also for example, in some remote areas (such as, in mountain area or desert area), be difficult to obtain domestic power supply, and in some developing countries, the price of electric power remains more expensive.In this case, expect a kind of for luminous replaceable power supply.
People have developed photovoltaic panel, solar heat electric installation, underground heat thermoelectric device etc., thereby utilize these renewable energy resources that energy is provided.But these utilize the device of regenerative resource to be generally used in high-power application scenario.But for example, for some lower powered devices (, illuminator), up to now, people do not develop the feasible program that can utilize regenerative resource.
Although occur at present a kind ofly coming for outdoor lighting by sunlight being directly changed into the photovoltaic power generation apparatus of electric energy,, this photovoltaic power generation apparatus has following shortcoming:
1) this to convert sunlight the photoelectric conversion efficiency of electric energy to very low, so the application of this photovoltaic power generation apparatus in illuminator is very restricted.
2) this photovoltaic power generation apparatus produces electric energy to receive sunlight as prerequisite, thereby can be subject to having a strong impact on of weather or weather.For example, under the weather such as cloudy day, snow sky, because sunlight can not be irradiated in photovoltaic panel, thereby the generation of electric energy will be affected.
3) because this photovoltaic power generation apparatus is generally used for open air, thereby on the surface of photovoltaic panel, easily accumulate dust, and the existence of dust will affect photovoltaic panel absorption luminous energy, and then affect the generation of electric energy.
4) this photovoltaic power generation apparatus must be equipped with storage battery to store the electric energy that it produces, and the volume and weight of storage battery is larger, will make the structure heaviness of whole photovoltaic power generation apparatus.
5) cost of storage battery is very high, thereby makes the cost of whole photovoltaic power generation apparatus very high, has limited its use.
6) useful life of storage battery very limited, thereby people need to later change storage battery in certain useful life, further make cost increase.
7) storage battery is interior due to the chemical substance that contains a large amount of harm natural environments, and its use is unfavorable for environmental protection.
8) sun light intensity amplitude of variation in a day is very large, makes the fluctuation of the electric power that photovoltaic panel produces very large, thereby complicated circuit must be set in photovoltaic power generation apparatus produce stable electric power.
Thereby, expect that a kind of replaceable method that can utilize the renewable energy resources comes for illuminator.
Summary of the invention
The object of the invention is to overcome the defect of prior art, thereby a kind of power supply for light fixture is provided and there is the illuminator of this power supply, thereby can realize the stable of light fixture and power supply efficiently with the renewable energy resources with low cost.
According to an aspect of the present invention, provide a kind of power supply for light fixture, this power supply comprises: hot storage part, and hot storage part has phase-change material; And thermoelectricity generating unit, have with the hot side of the phase-change material thermal communication in hot storage part and with hot side relative cold side, thermoelectricity generating unit produces electric energy according to the temperature difference of hot side and cold side.The thermoelectricity generating means being applied in illuminator produces electric power take heat energy as basis, even if thereby can not directly receive sunlight, as long as it can receive the thermal radiation of the sun, can produce electric energy, thereby be conducive to avoid photovoltaic panel in the photoelectricity generating means in known technology to be subject to the shortcoming of weather or climatic influences.In addition, the photoelectricity generating means in known technology must adopt storage battery to carry out storage of electrical energy, and cost is high and structure is heavy, and the phase-change material of thermoelectricity generating unit in the present invention cost is low and lightweight comparatively speaking.In the time that this application of power is in illuminator, no matter whether illuminator accesses electrical network, and this power supply can provide stable electric power for illuminator.
Preferably, power supply further comprises hot polymerization collection portion, and for being radiated the heat accumulation of hot polymerization collection portion, phase-change material receives and store the heat that comes from hot polymerization collection portion.Hot polymerization collection portion is favourable by heat accumulation, promotes absorption and the storage of heat.
Preferably, hot polymerization collection portion is made up of the optical element for gathered light.In the situation that being applied to outdoor lamp, its main thermal source comes from sunlight, thereby by hot polymerization collection portion being arranged for to the optical element of gathered light, thereby sunlight can be assembled, thereby the heat accumulation that sunlight is produced, is beneficial to absorption and the storage of heat.
Preferably, power supply further comprises heat absorption portion, and heat absorption portion is for absorbing the heat of being assembled by hot polymerization collection portion, and heat absorption portion and phase-change material thermal communication are to pass to phase-change material by the heat being absorbed.The setting of heat absorption portion can make heat be rapidly absorbed and be delivered to phase-change material.
Preferably, hot polymerization collection portion will be radiated hot polymerization collection portion heat accumulation to focus or focal plane, and heat absorption portion is arranged at focus or focal plane place.The heat at focus or focal plane place is concentrated, thereby heat absorption portion is arranged at focus or focal plane place can make the absorption efficiency of heat high.
Preferably, hot polymerization integrates portion as concave mirror or lens.The use of concave mirror or lens can make the simple in structure of power supply and easily manufactures and assemble.
Preferably, described concave mirror has the cross section of parabolic shape, thereby can more effectively assemble heat.
Preferably, hot polymerization collection portion is arranged on hot storage part with array way.The layout of array way can increase the area of heat absorption on the one hand, thereby can absorb as much as possible heat; Can make on the other hand the absorptance of heat more even, thereby the temperature of the hot side of thermoelectricity generating unit is even, is beneficial to and produces stable voltage.
Preferably, heat absorption portion and hot storage part form separately.That is to say, heat absorption portion and hot storage area body form, thereby make heat absorption portion can select the material that has better heat absorption performance and transmit performance to make, thereby can realize and heat is absorbed fast and be delivered to phase-change material.
Preferably, heat absorption portion is made of metal at least in part.Metal has good heat absorption performance and transmits performance, can make heat be rapidly absorbed and be delivered to phase-change material.
Preferably, heat absorption portion and hot storage part are integrally formed, thereby can make the simple in structure of power supply, easily manufactured.
Preferably, heat absorption portion comprises the protuberance outstanding from the end face of hot storage part, and protuberance accommodates phase-change material, and the phase-change material in protuberance can be communicated with by fluid with the phase-change material in hot storage part.That is, protuberance has the cavity being communicated with hot storage part, can make on the one hand heat absorption portion and hot storage part for example to form with molded straightforward procedure; On the other hand, the connection of phase-change material fluid can be conducive to the quick transmission of heat.
Preferably, heat absorption portion is formed as spherical.Spherical shape is conducive to make heat absorption portion to concentrate on focus place, thereby realize, the high efficiency of heat is absorbed.
Preferably, hot storage part comprises the container of being made up of transparent material at least in part, and phase-change material is contained in container, absorbs light and then absorption heat thereby be conducive to phase-change material by transparent container.
Preferably, container is airtight container, thereby avoids heat because gas communication is lost, and has improved the service efficiency of heat, and has further extended the power-on time of power supply to light fixture.
Preferably, the periphery wall of container is attached with heat-insulating material, thereby has further avoided thermal loss, has improved the service efficiency of heat, and has further extended the power-on time of power supply to light fixture.
Preferably, container adheres to the hot side of thermoelectricity generating unit by heat-conducting glue.The use of heat-conducting glue is beneficial to the fixing of container on the one hand, is beneficial on the other hand heat conduction, thereby has realized fixing and heat conducting double action.
Preferably, phase-change material is the compound having from the melting point of 250 degrees Celsius to 330 degrees Celsius.The phase-change material of high melting point is beneficial to cold side and forms larger temperature difference, thereby improves the conversion efficiency of thermoelectric of thermoelectricity generating unit.
Preferably, phase-change material is the one in following compound: LiNO
3, NaOH-NaNO
3, NaOH-NaNO
2, NaNO
2, ZnCl
2, NaNO
3, NaOH, KNO
3.These preferred phase-change material melting points are high, and cost is low, and latent capacity is large, not only can be by forming and improve the conversion efficiency of thermoelectric of thermoelectricity generating unit compared with large temperature difference with cold side, and reduced power supply cost, increased the power-on time of power supply.
Preferably, thermoelectricity generating unit is greater than 1 thermoelectric material by thermoelectric figure of merit ZT to be made, thereby can improve the conversion efficiency of thermoelectric of thermoelectricity generating unit.
Preferably, the thermoelectric material that thermoelectricity generating unit is 2 ~ 3 by thermoelectric figure of merit ZT is made, and is conducive to further improve the conversion efficiency of thermoelectric of thermoelectricity generating unit, improves energy utilization rate.
Preferably, thermoelectricity generating unit is made up of the one in following thermoelectric material: Bi
2te
3, PbTe and BiSb.These preferred materials can make the cost of power supply, conversion efficiency of thermoelectric increase.
Preferably, cold side is attached with radiator.Radiator is beneficial to the low temperature that keeps cold side being attached with of cold side, thereby forms large temperature difference with hot side, and the conversion efficiency of thermoelectric of thermoelectricity generating unit is improved.
Preferably, radiator is fan or aluminium block, and the structure that the use of this radiator can make power supply is relatively simple, cost is low and good heat dissipation effect.
Preferably, light fixture is LED light fixture.With respect to conventional lamp, the power consumption of LED is low, thereby, even the power limited providing in thermoelectricity generating unit, can make power supply be suitable for meeting the needs of LED light fixture.
According to a further aspect in the invention, also provide a kind of illuminator, it comprises according to the power supply described in aforementioned any one and the light fixture that is electrically connected with power supply.
Preferably, illuminator comprises converter, and it is predetermined voltage by the voltage transitions from power supply to light fixture supply that converter is used for, thereby can supply stable electric power to light fixture.
Preferably, illuminator comprises storage battery, storage battery in response to the state of thermoelectricity generating unit optionally storage come from power supply electric energy the part that exceeds light fixture demand or by stored electric power supply to light fixture.That is to say, the excess energy that the use of storage battery not only can make thermoelectricity generating unit produce is recovered, thereby further extend power-on time, and storage battery can also be used as stand-by power supply, thereby can not provide enough electric power supplementary electric power is provided in thermoelectricity generating unit, thereby meet the need for electricity of light fixture.
Accompanying drawing explanation
Accompanying drawing forms the part of this specification, for helping further to understand the present invention.Accompanying drawing illustrates embodiments of the invention, and is used for illustrating principle of the present invention together with specification.Identical parts represent with identical label in the accompanying drawings.Shown in figure:
Fig. 1 schematically shows the hot storing process of phase-change material and the curve chart of hot dispose procedure; And
Fig. 2 illustrates the dried rhizome of rehmannia to show the illuminator that comprises the power supply with thermoelectricity generating unit according to of the present invention.
Embodiment
Hereinafter with reference to the accompanying drawing that shows exemplary embodiment of the present, the present invention is described more fully.But the present invention can, with multiple multi-form enforcement, construct and should not only limit to exemplary embodiment set forth herein.Certainly, it is in order to make this announcement more comprehensively with complete that these exemplary embodiments are provided, and can fully pass on scope of the present invention to those skilled in the art.
Explain in detail with reference to the accompanying drawings the present invention below.
With reference to Fig. 2, according to an embodiment of the invention, provide a kind of illuminator, the LED light fixture 8 that this illuminator comprises power supply, be electrically connected with this power supply by electric wire 9 and be used to LED light fixture 8 that the converter 10 of the voltage of expectation is provided.According to the present invention, thermoelectricity generating means is applied in the power supply in illuminator.Specifically, power supply comprises: it has hot side 51 and cold side 52 hot polymerization collection portion 1, heat absorption portion 2, container 3, phase-change material 4, thermoelectricity generating unit 5(), radiator 6, heat-insulating material 7.Below, these parts are described in more detail.
In container 3, accommodate phase-change material 4, thereby container 3 and phase-change material 4 form the hot storage part according to power supply of the present invention.Thermoelectricity generating unit 5 have with the hot side 51 of phase-change material 4 thermal communications in hot storage part and with hot side 51 relative cold side 52, thermoelectricity generating unit 5 produces electric energy according to hot side 51 and the temperature difference of cold side 52.On the both sides of the ceramic wafer of thermoelectricity generating unit 5, all can be stained with high conductive graphite sheet, so that low contact heat resistance to be provided.
According to said structure, can understand, power supply of the present invention comprises thermoelectricity generating unit (thermoelectric generator, TEG) 5, wherein be combined with the phase-change material (phase change material, PCM) of latent heat, thereby phase-change material is as the energy source of LED light fixture.
Below, thermoelectricity generating unit 5 is described in detail.The hot side of thermoelectricity generating unit 5 and phase-change material 4 carry out thermo-contact.In the time there is the temperature difference in the both sides of thermoelectricity generating unit 5, according to Seebeck(Seebeck) effect, will between two contacts (junction) of thermoelectricity generating unit, will there is voltage difference.Thermal power transfer becomes the efficiency of electric energy to depend on the temperature difference between thermoelectric figure of merit (ZT) and hot side and the cold side of material.According to the present invention, in order to improve conversion efficiency of thermoelectric, the thermoelectric material that preferably ZT value is greater than 1, for example Bi
2te
3, PbTe, BiSb.Preferably, by methods such as doping, can obtain the thermoelectric material of ZT value within the scope of 2-3.
Below, in order to make the present invention clearer, in conjunction with Fig. 1, phase-change material is briefly described.
Phase-change material 4 as the needed origin of heat of thermal source of thermoelectricity generating unit 5 in solar energy.In the time that solar energy is radiated on phase-change material 4 by day, heat can be stored in phase-change material 4 with relative stationary temperature.The phase-change material 4 with melting latent heat produces phase transformation, and the relation of its phase transformation and temperature schematically illustrates as shown in Figure 1.In Fig. 1, phase-change material 4 is when receiving after the heat that comes from solar energy, and the temperature of left side curve O-A starts to rise from initial point O, until reach an A.The heat input that comes from solar energy will further make phase-change material 4 meltings, but temperature does not rise (,, as shown in A-B, phase-change material 4 enters its phase transformation state), then, the temperature of phase-change material 4 keeps its substantially invariable melting point and absorbs a large amount of heats at this temperature place.Phase-change material 4 continues to absorb heat and temperature does not rise, until all material in B point place phase-change material 4 all becomes liquid phase.When at night, no longer include the heat radiation that comes from solar energy on phase-change material 4, and the ambient temperature decline around of the phase-change material 4 of liquid, phase-change material 4 solidifies starting, the contrary process of phase transformation while starting to occur with daytime., carry out phase transformation from a B towards an A.By phase transition process, phase-change material 4 by absorbed thermal release out, and offers thermoelectricity generating unit 5 by this heat.
In process at phase-change material 4 from B to A, it is constant that temperature keeps substantially.Thereby, also substantial constant of the output voltage of thermoelectricity generating unit 5, and the stability that complicated circuit keeps voltage needn't be set.Because maximum current depends on constant internal resistance, thereby the maximum output power of this thermoelectric power generation portion is also constant substantially.Phase-change material, for thermoelectricity generating unit 5, can improve the stability of its surperficial temperature.In addition, because phase-change material is stored in heat wherein by phase transformation, and out and by thermoelectricity generating unit convert thermal release to electric energy in the time of night, thereby can make the operating time of power supply of the present invention extend to night,, realize not only by day but also can be illuminator power supply the time at night.
That is to say, latent heat is stored in phase-change material 4, thereby accumulate heat energy by absorbing by day and assembling solar energy, and heat energy is converted into electric energy by thermoelectricity generating unit 5, thereby not only by day but also can be at night for driving LED light fixture, thus power supply of the present invention do not need the heavy and expensive battery of volume.In addition, according to the present invention, be combined with the thermoelectricity generating unit 5 of phase-change material 4 of latent heat due to electric power can be provided independently, even thereby illuminator do not access electrical network, also can realize illumination.
Suppose direct irradiation of sunlight on phase-change material 4 (, in the situation that not arranging according to hot polymerization collection portion 1 of the present invention and heat absorption portion 2), phase-change material 4 (is for example stored in airtight transparent storage container, made by glass) in, and in the time that daytime, solar light irradiation was on container, the temperature of this container can reach 60 degrees Celsius.
Suppose to adopt the thermoelectricity generating unit 5 with bismuth telluride to carry out driving LED light fixture, the ZT value of this thermoelectricity generating unit is approximately 1.1 in the time of 300K.If when the phase-change material 4 that uses the melting point with about 60 degrees Celsius as the thermal source of thermoelectricity generating unit 5 and and then for driving LED light fixture, and the temperature of supposing cold side is 20 degrees Celsius while being 40 degrees Celsius (are temperature difference), conversion efficiency of thermoelectric is 2.3% left and right, and at this moment power supply may will only produce the power output of 1W.
In table 1, listed the melting point, ablation heat, density of phase-change material 4, these materials of the melting point with about 60 ± 12 degrees Celsius and for generation of the power output of 1W to drove the quality (calculating of described quality be hypothesis have under the prerequisite that under the temperature difference of 40 degrees Celsius, conversion efficiency of thermoelectric is 2.3% carry out) of the needed material of LED matrix (, the power in four hours be approximately 1W and total electric energy is about 14.4KJ) of 1W on electrothermal module in four hours.
Table 1: the characteristic with the phase-change material of the melting point of 60 ± 12 degrees Celsius
Can be drawn by description and above-mentioned table 1 above, conversion efficiency of thermoelectric is in this case lower, and power output less (1W).Thereby, if use this execution mode, may need the quantity of the thermoelectricity generating unit being connected in series by connection converter or change to make output voltage meet the needs of LED light fixture, thereby voltage can be changed according to the difference of practical application.
As can be seen from the above Table 1, although the phase-change material 4 of required use reduces to some extent than the quality of the battery in known technology, its quality is relatively large (when especially comparing with the table 2 of describing afterwards) still.The phase-change material 4 that quality is larger will make the structure heaviness of power supply.In addition, as mentioned above, because its power output is lower, thereby may need the thermoelectricity generating unit of a greater number to form power supply, thereby may further increase the weight of power supply.
Thereby the present invention is further improved structure.Specifically, in power supply, be further provided with hot polymerization collection portion 1.Hot polymerization collection portion 1 is for being radiated the heat accumulation of hot polymerization collection portion 1, thereby phase-change material 4 receives and store the heat that comes from hot polymerization collection portion 1.Hot polymerization collection portion is favourable by heat accumulation, promotes absorption and the storage of heat, thereby can produce higher temperature.Described higher temperature means that the temperature of hot side of thermoelectricity generating unit is higher, thereby in the time that cold side is still for example the temperature of 20 degrees Celsius, the temperature difference that makes hot side and cold side is become to large, thereby can improve conversion efficiency of thermoelectric.
Preferably, hot polymerization collection portion 1 is made up of the optical element for gathered light, thereby makes to make heat accumulation by the gathering of sunlight.Preferably, hot polymerization integrates portion 1 as concave mirror or lens, and for example, as shown in Figure 2, hot polymerization collection portion 1 can be the concave mirror with the cross section of parabolic shape.The minute surface collector of parabolic curved can reflect the solar energy of direct projection, and sunlight is assembled in heat absorption portion, thereby obtains the solar energy of assembling.According to the material of the design of geometry and hot polymerization collection portion, the sunlight of assembling can be heated to phase-change material 4 higher temperature of expectation.But this hot polymerization collection portion 1 is not limited to described concave mirror or lens, as long as it can be designed so that heat accumulation.
Hot polymerization collection portion 1 will be radiated hot polymerization collection portion 1 heat accumulation to focus or focal plane.For heat being rapidly absorbed and being delivered to phase-change material, can preferably in focus or focal plane place, heat absorption portion 2 be set.That is to say, heat absorption portion 2 is for absorbing the heat of being assembled by hot polymerization collection portion 1, and heat absorption portion 2 with phase-change material 4 thermal communications so that the heat being absorbed is passed to phase-change material 4.
According to the present invention, by the setting of hot polymerization collection portion 1 and heat absorption portion 2, can make temperature reach 300 degrees Celsius of left and right, and working temperature even can reach 400 degrees Celsius.Thereby, correspondingly can choice for use there is the material of melting point of approximately 300 degrees Celsius as phase-change material 4, and then provide thermal source for thermoelectricity generating unit 5.Suppose to adopt the thermoelectricity generating unit with bismuth telluride to carry out driving LED light fixture, the phase-change material 4 of melting point that there are approximately 300 degrees Celsius in use, the hot side 51 of thermoelectricity generating unit can be 280 degrees Celsius (temperature of supposing cold side is 20 degrees Celsius) with the temperature difference of cold side 52, this electrothermal module will produce the power output of 5W, and provide the open circuit voltage of 10V, and energy conversion efficiency is 11.7%.
Table 2 melting point that melting point is phase-change material 4 melting salt compounds, these materials of 250 degrees Celsius to 330 degrees Celsius, ablation heat, density are disclosed and for generation of the power output of 1W to drove the quality (calculating of described quality be hypothesis have under the prerequisite that under the temperature difference of 280 degrees Celsius, conversion efficiency of thermoelectric is 11.7% carry out) of the needed material of LED matrix (, the power in four hours be approximately 1W and total electric energy is about 14.4KJ) of 1W on electrothermal module in four hours.
Table 2: the characteristic with the phase-change material of the melting point of 250 to 330 degrees Celsius
Thereby, according to the present invention, can preferably have from the material as phase-change material 4 of the melting point of 250 degrees Celsius to 330 degrees Celsius and comprise LiNO
3, NaOH-NaNO
3, NaOH-NaNO
2, NaNO
2, ZnCl
2, NaNO
3, NaOH, KNO
3.By the use of hot polymerization collection portion and these phase-change materials, can greatly improve the conversion efficiency of thermoelectric of thermoelectricity generating unit 5.In addition, convert the electric energy of 14.4KJ to so that the power output that produces 1W is in the case of operating in the time period long between four hours the LED matrix of 1W at the heat energy that 129KJ is provided, the quality of material is approximately 0.5Kg.,, with respect to the phase-change material 4 of melting point with approximately 60 degrees Celsius, quality greatly reduces, and can make power supply lightweight.
Thereby, according to the present invention, assemble solar energy by a kind of hot polymerization storage of design and use, can increase the heat being radiated on phase-change material 4 to obtain higher temperature.Thereby, can utilize the phase-change material 4 with higher melting point to improve conversion efficiency of thermoelectric, and for the power output of same amount, can reduce the quality of needed phase-change material 4.
According to the present invention, for example as shown in Figure 2, multiple hot polymerization collection portion 1 can array way be arranged on hot storage part, thereby increases on the one hand the area of heat absorption, can absorb as much as possible heat; Can make on the other hand the absorptance of heat more even, thereby the temperature of the hot side of thermoelectricity generating unit is even, is beneficial to and produces stable electric power.
Preferably, for the benefit of absorb heat by absorbing light, hot storage part comprises the container 3 of being made up of the transparent material at least in part of for example glass, and phase-change material 4 is contained in container 3.Preferably, the container that transparent material is made is airtight container, thereby avoids heat because gas communication is lost.Further, the periphery wall of container 3 also can be attached with heat-insulating material 7.
Certainly, heat absorption portion 2 also can be integrally formed with hot storage part.For example, heat absorption portion 2 comprises the protuberance outstanding from the end face of container 3, and protuberance accommodates phase-change material, and the phase-change material in protuberance can be communicated with by fluid with the phase-change material in hot storage part.Thereby the phase-change material in heat absorption portion 2 is owing to being heated fast after thawing in heat accumulation place, the phase-change material of heating and melting flows in container 3, and then transfer heat to other phase-change material in container 3, thereby heat is stored in this container, and finally for thermoelectricity generating unit 5 provides thermal source.
In order to keep the low temperature of cold side 52, cold side 52 can be attached with radiator 6.For example, radiator 6 is fan or aluminium block.
Preferably, illuminator also can comprise storage battery (not shown), storage battery in response to the state of thermoelectricity generating unit optionally storage come from power supply electric energy the part that exceeds LED light fixture demand or by stored electric power supply to LED light fixture.What deserves to be explained is, not necessarily, and its effect is not identical with the effect of the storage battery in photovoltaic power generation apparatus in known technology yet for storage battery of the present invention.The effect of storage battery of the present invention is mainly, the excess energy that can make thermoelectricity generating unit produce is recovered, thereby further extend power-on time, and can be used as stand-by power supply, thereby can not provide enough electric power supplementary electric power is provided in thermoelectricity generating unit, thereby meet the need for electricity of light fixture.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
List of reference characters:
1 hot polymerization collection portion
2 heat absorption portions
3 containers
4 phase-change materials
5 thermoelectricity generating units
51 hot sides
52 cold sides
6 radiators
7 heat-insulating materials
8LED light fixture
9 electric wires
10 converters.
Claims (28)
1. for a power supply for light fixture, it is characterized in that, described power supply comprises:
Hot storage part (3,4), described hot storage part has phase-change material (4); And
Thermoelectricity generating unit (5), have with the hot side (51) of described phase-change material (4) thermal communication in described hot storage part (3,4) and with described hot side (51) relative cold side (52), described thermoelectricity generating unit (5) produces electric energy according to described hot side (51) and the temperature difference of described cold side (52).
2. power supply according to claim 1, it is characterized in that, described power supply further comprises hot polymerization collection portion (1), and for being radiated the heat accumulation of described hot polymerization collection portion (1), described phase-change material (4) receives and store the heat that comes from described hot polymerization collection portion (1).
3. power supply according to claim 2, is characterized in that, described hot polymerization collection portion (1) is made up of the optical element for gathered light.
4. power supply according to claim 3, it is characterized in that, described power supply further comprises heat absorption portion (2), described heat absorption portion (2) is for absorbing the heat assembled by described hot polymerization collection portion (1), and described heat absorption portion (2) with described phase-change material (4) thermal communication the heat being absorbed is passed to described phase-change material (4).
5. power supply according to claim 4, is characterized in that, described hot polymerization collection portion (1) will be radiated the described heat accumulation of described hot polymerization collection portion (1) to focus or focal plane, and described heat absorption portion (2) is arranged at described focus or focal plane place.
6. according to the power supply described in any one in claim 2 to 5, it is characterized in that, described hot polymerization integrates portion (1) as concave mirror or lens.
7. power supply according to claim 6, is characterized in that, described concave mirror has the cross section of parabolic shape.
8. power supply according to claim 6, is characterized in that, described hot polymerization collection portion (1) is arranged on described hot storage part (3,4) with array way.
9. according to the power supply described in any one in claim 4 to 5, it is characterized in that, described heat absorption portion (2) and described hot storage part (3,4) form separately.
10. power supply according to claim 9, is characterized in that, described heat absorption portion (2) is made of metal at least in part.
11. according to the power supply described in any one in claim 4 to 5, it is characterized in that, described heat absorption portion (2) and described hot storage part (3,4) are integrally formed.
12. power supplys according to claim 11, it is characterized in that, described heat absorption portion (2) comprises from the outstanding protuberance of end face of described hot storage part (3,4), described protuberance accommodates phase-change material, and the phase-change material in described protuberance can be communicated with by fluid with the described phase-change material in described hot storage part (3,4).
13. according to the power supply described in any one in claim 4 to 5, it is characterized in that, described heat absorption portion (2) is formed as spherical.
14. according to the power supply described in any one in claim 1 to 5, it is characterized in that, described hot storage part (3,4) comprises the container (3) of being made up of transparent material at least in part, and described phase-change material (4) is contained in described container (3).
15. power supplys according to claim 14, is characterized in that, described container (3) is airtight container.
16. power supplys according to claim 14, is characterized in that, the periphery wall of described container is attached with heat-insulating material (7).
17. power supplys according to claim 14, is characterized in that, described container adheres to the described hot side (51) of described thermoelectricity generating unit (5) by heat-conducting glue.
18. according to the power supply described in any one in claim 1 to 5, it is characterized in that, described phase-change material (4) is for having the compound from the melting point of 250 degrees Celsius to 330 degrees Celsius.
19. power supplys according to claim 18, is characterized in that, described phase-change material (4) is the one in following compound: LiNO
3, NaOH-NaNO
3, NaOH-NaNO
2, NaNO
2, ZnCl
2, NaNO
3, NaOH, KNO
3.
20. according to the power supply described in any one in claim 1 to 5, it is characterized in that, described thermoelectricity generating unit (5) is greater than 1 thermoelectric material by thermoelectric figure of merit ZT and makes.
21. power supplys according to claim 20, is characterized in that, the thermoelectric material that described thermoelectricity generating unit (5) is 2 ~ 3 by thermoelectric figure of merit ZT is made.
22. power supplys according to claim 20, is characterized in that, described thermoelectricity generating unit (5) is made up of the one in following thermoelectric material: Bi
2te
3, PbTe and BiSb.
23. according to the power supply described in any one in claim 1 to 5, it is characterized in that, described cold side (52) is attached with radiator (6).
24. power supplys according to claim 23, is characterized in that, described radiator (6) is fan or aluminium block.
25. according to the power supply described in any one in claim 1 to 5, it is characterized in that, described light fixture is LED light fixture (8).
26. 1 kinds of illuminators, is characterized in that, comprise the light fixture being electrically connected according to the power supply described in any one in claim 1 to 25 and with described power supply.
27. illuminators according to claim 26, is characterized in that, described illuminator comprises converter (10), and it is predetermined voltage by the voltage transitions from described power supply to described light fixture supply that described converter is used for.
28. according to the illuminator described in claim 26 or 27, it is characterized in that, described illuminator comprises storage battery, described storage battery in response to the state of described thermoelectricity generating unit optionally storage come from described power supply electric energy the part that exceeds described light fixture demand or by stored electric power supply give described light fixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210455350.8A CN103812385A (en) | 2012-11-13 | 2012-11-13 | Lamp power source and illuminating system comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210455350.8A CN103812385A (en) | 2012-11-13 | 2012-11-13 | Lamp power source and illuminating system comprising same |
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| CN103812385A true CN103812385A (en) | 2014-05-21 |
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ID=50708701
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210455350.8A Pending CN103812385A (en) | 2012-11-13 | 2012-11-13 | Lamp power source and illuminating system comprising same |
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| CN (1) | CN103812385A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845818A (en) * | 2015-02-02 | 2016-08-10 | 现代自动车株式会社 | Thermoelectric generation apparatus |
| CN106128300A (en) * | 2015-05-07 | 2016-11-16 | 三星电子株式会社 | Display device |
-
2012
- 2012-11-13 CN CN201210455350.8A patent/CN103812385A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845818A (en) * | 2015-02-02 | 2016-08-10 | 现代自动车株式会社 | Thermoelectric generation apparatus |
| CN105845818B (en) * | 2015-02-02 | 2019-07-16 | 现代自动车株式会社 | Thermoelectric generating device |
| CN106128300A (en) * | 2015-05-07 | 2016-11-16 | 三星电子株式会社 | Display device |
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Application publication date: 20140521 |