CN111164344B - Lighting fixture for microalgae cultivation and manufacturing method of lighting fixture - Google Patents
Lighting fixture for microalgae cultivation and manufacturing method of lighting fixture Download PDFInfo
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- CN111164344B CN111164344B CN201980003981.6A CN201980003981A CN111164344B CN 111164344 B CN111164344 B CN 111164344B CN 201980003981 A CN201980003981 A CN 201980003981A CN 111164344 B CN111164344 B CN 111164344B
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
-
- H01L33/48—
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- H01L33/50—
-
- H01L33/60—
-
- H01L33/62—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- H01L2933/0033—
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- H01L2933/0041—
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- H01L2933/0058—
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Cultivation Of Plants (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
Abstract
The invention provides a lighting fixture for microalgae cultivation and a manufacturing method of the lighting fixture, wherein the lighting fixture comprises: the lighting fixture comprises a lighting fixture component and at least one LED lamp bead arranged on the lighting fixture component, wherein the lighting fixture at least has the following light-emitting characteristics: a) the spectrum with the wavelength between 500nm and 660nm is partially or completely formed by exciting and converting fluorescent materials; b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm; c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25; d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1. The spectral curve of the lighting fixture is matched with the absorption spectral curve of the microalgae, the light energy utilization efficiency is high, and the absorption of different microalgae can be met.
Description
Technical Field
The invention belongs to the technical field of lighting devices, and particularly relates to a lighting fixture for microalgae cultivation and a manufacturing method of the lighting fixture.
Background
Microalgae are an ancient low-grade unicellular plant widely distributed in ocean, freshwater lake and other water areas. The microalgae cells are small, have various shapes, strong adaptability and wide distribution. Algae with various species play an important role in a water area ecosystem, are important natural baits for culturing shellfish, shrimps and sea cucumbers, are the basis of a fish food chain, and the natural baits of the marine fishes generally come from planktonic algae directly or indirectly.
The microalgae plants, like higher plants, can utilize carbon dioxide and water to form organic substances under the condition of illumination, grow rapidly and efficiently, and are autotrophic plants capable of living independently. The illumination influence is a decisive factor for determining the vertical distribution of the microalgae, because the water body has strong light absorption capacity, and because the seawater easily absorbs long-wavelength light, the spectral difference of each water layer is caused, so that the requirements of various microalgae living on different depths of layers on light intensity and spectrum are different. Green algae generally live on the surface layer of water to absorb long-wavelength light such as red light, while red algae and brown algae can absorb short-wavelength light such as green light, yellow light, orange light and the like to live in deep water. At present, microalgae which can be cultivated and produced in large quantities mainly comprise cyanophyta, chlorophyta, chrysophyta and rhodophyta.
The selective absorption of light waves by photosynthetic pigments is the adaptation of plants to the ecological environment formed in the long-term evolution, and the suitable spectral proportions of different plants are different. The spectrum of the traditional lighting equipment contains more infrared and ultraviolet components which are not suitable for plant absorption and can generate more heat, and the LED can emit monochromatic light required by plant photosynthesis, which is the basis for plant biomass and yield formation.
At present, a 6500K fluorescent lamp is mainly adopted for microalgae cultivation, a plant growth lamp is partially adopted, a lamp capable of selectively adjusting light is also adopted for microalgae cultivation, different spectrums are realized by controlling the brightness combination of different chips, however, the fluorescent lamp contains more ultraviolet components and has low spectrum utilization rate; the plant growth lamp mainly has red and blue spectrums, has single spectrum component and is not suitable for the growth and the propagation of algae; the dimmable lamp is high in cost, low in lighting effect, only suitable for experimental application and not suitable for large-scale cultivation and use.
Therefore, it is an urgent problem to solve how to design and manufacture an LED lighting device with higher spectral absorption efficiency for the absorption characteristics of different microalgae to provide green, yellow, and orange light required for microalgae cultivation to meet the requirements of various microalgae cultivation and light environments.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a lighting fixture for microalgae cultivation and a method for manufacturing the lighting fixture, which is used to solve the problem that the existing lighting device cannot provide a suitable environment for microalgae cultivation. To achieve the above and other related objects, the present invention provides a lighting fixture for microalgae cultivation, comprising: the lighting fixture comprises a lighting fixture component and at least one LED lamp bead arranged on the lighting fixture component, wherein the lighting fixture at least has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is partially or completely formed by exciting and converting fluorescent materials;
b) the wavelength of the peak value of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the ratio of the radiant energy of red light to blue light and the radiant energy of red light to green light are
0.5 to 1.
Further, the wavelength range of the red light is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm.
Further, the fluorescent material is an up-conversion material.
Still further, the upconverting material comprises one or more of an aluminate, a silicate, a nitride, an oxynitride.
Still further, the aluminate includes one or more of YAG derivatives, LuAG derivatives.
Further, the lighting fixture comprises at least one LED lamp bead, and each LED lamp bead has the light-emitting characteristics in a), b), c) and d).
Further, the LED lamp bead comprises a chip support, a wire and a blue chip with the peak wavelength of 400nm-500nm, a reflecting cup is arranged on the chip support, the blue chip is installed on the bottom of the reflecting cup, the wire is connected with the blue chip and pins at two ends, and the fluorescent material is arranged in the reflecting cup.
Furthermore, the blue chip is a chip with the wavelength of 450nm below 0.5W.
Further, the fluorescent material is prepared by the following method:
mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture; taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel fully according to a ratio of 1.5-2.5: 7.5-8.5 to form a fluorescent powder silica gel mixture, and then dropping the fluorescent powder silica gel mixture into the reflecting cup.
Further, the lighting fixture comprises a lighting structure assembly and a plurality of LED lamp beads with different colors and different color temperatures, which are arranged on the lighting structure assembly, and the LED lamp beads with different colors and different color temperatures are combined to have the light-emitting characteristics in a), b), c) and d).
Furthermore, the lighting structure assembly comprises a printed circuit board, a driving part and a heat dissipation structure part, wherein the LED lamp beads with different colors and different color temperatures are welded on the printed circuit board, and the driving part drives the printed circuit board.
Further, the driving part is a constant current conversion circuit.
Furthermore, the heat dissipation structure is any one of die-cast aluminum, extruded and drawn aluminum, high thermal conductivity plastic and graphite.
The invention also provides a manufacturing method of the lighting fixture for cultivating the microalgae, the lighting fixture comprises at least one LED lamp bead, and each LED lamp bead has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the ratio of the radiant energy of red light to blue light and the radiant energy of red light to green light are
0.5 to 1
The manufacturing process of the LED lamp bead at least comprises the following steps: a blue chip with a single peak wavelength of 400nm-500nm is arranged at the bottom of a reflecting cup of a chip bracket, and the chip is electrically connected with pins at two ends through a lead;
dripping the fluorescent powder silica gel mixture into the reflecting cup and curing into corresponding fluorescent particles;
and the lamp beads have the light-emitting characteristic by adjusting the proportional relation of the fluorescent materials in the fluorescent powder silica gel mixture.
Further, the preparation method of the fluorescent powder silica gel mixture comprises the following steps:
mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture; and taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel according to a ratio of 1.5-2.5: 7.5-8.5, and fully forming a fluorescent powder silica gel mixture.
Furthermore, the adjustment of the position of the second peak between 500nm and 660nm can be realized by adjusting the proportional relation of the green phosphor and the red phosphor.
The invention also provides another manufacturing method of the lighting fixture for microalgae cultivation, which comprises the following steps: through the combination adjustment of a plurality of beads with different colors and different color temperatures, which are arranged on the lighting fixture component, the lighting fixture has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is partially or completely formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) the ratio of radiant energies of red light and blue light and the ratio of radiant energies of red light and green light in the spectrum of the lighting fixture are
0.5 to 1.
Furthermore, the position of the second peak between 500nm and 660nm can be adjusted by changing the number of the lamp beads with different colors.
Furthermore, the lighting structure assembly comprises a printed circuit board, a driving part and a heat dissipation structural part, the LED lamp beads with different colors and different color temperatures are welded on the printed circuit board, and the driving part drives the printed circuit board.
As described above, the lighting fixture for microalgae cultivation of the present invention has the following beneficial effects: the emission spectrum curve of the lighting fixture is not only matched with the absorption spectrum curves of the chlorophyll and the phycobilin of the microalgae, the light energy utilization efficiency is high, but also the absorption of different microalgae can be met, the adaptability is good, and the lighting fixture is suitable for mass production. In addition, the lighting fixture has simple structure and can meet the requirements of various lamp body forms such as high well lamps or line lamps and the like.
Drawings
FIG. 1 shows relative spectral curves for a lighting fixture of the present invention;
FIG. 2 shows a relative spectral curve of a lighting fixture of the present invention with an adjustable second peak;
FIG. 3 is a schematic diagram of an LED lamp bead according to an embodiment of the lighting fixture of the present invention;
FIG. 4 is a cross-sectional view of a second embodiment of a lighting fixture of the present invention;
FIG. 5 is a diagram illustrating a distribution of beads in a second embodiment of a lighting fixture according to the present invention;
FIG. 6 is a graph showing a spectrum with a color temperature of 2700K in the fourth embodiment;
FIG. 7 is a graph showing a spectrum with a color temperature of 6500K in the fourth embodiment;
FIG. 8 is a graph of the spectrum of a non-phosphor excited red LED in the fourth example;
FIG. 9 is a graph showing a spectrum of a lighting fixture according to the fourth embodiment;
FIG. 10 is a graph showing a spectrum of a fifth example having a color temperature of 6500K;
FIG. 11 is a graph showing a spectrum with a color temperature of 1800K in the fifth embodiment;
fig. 12 is a graph showing a spectrum of a lighting fixture according to the fifth embodiment.
Description of the element reference numerals
1 Lamp bulb
2 printed circuit board
3 Heat dissipation structure
4 drive part
5 chip
6. Chip support
7. Reflection cup
8. Fluorescent particle
9. Pin
10 wire
Detailed Description
Microalgae are ancient low-grade unicellular plants widely distributed in oceans, freshwater lakes and other water areas. The microalgae cells are small, have various shapes, are strong in adaptability and are widely distributed. Algae with various species play an important role in a water area ecosystem, are important natural baits for culturing shellfish, shrimps and sea cucumbers, are the basis of a fish food chain, and the natural baits of the marine fishes generally come from planktonic algae directly or indirectly.
Microalgae plants, like higher plants, can use carbon dioxide and water to synthesize organic substances under the condition of illumination, grow rapidly and efficiently, and are autotrophic prototroph plants capable of living independently. The influence of illumination is a decisive factor for determining the vertical distribution of microalgae, because the water body has strong light absorption capacity, and because seawater easily absorbs long-wavelength light, the spectral difference of each water layer is caused, so that the requirements of various microalgae on light intensity and spectrum are different. Green algae generally live on the surface layer of water to absorb long-wavelength light such as red light, while red algae and brown algae can absorb short-wavelength light such as green light, yellow light, orange light and the like to live in deep water. At present, microalgae which can be cultivated and produced in large quantities mainly comprise cyanophyta, chlorophyta, chrysophyta and rhodophyta.
The selective absorption of light waves by photosynthetic pigments is the adaptation of plants to the ecological environment formed in the long-term evolution, and the suitable spectral proportions of different plants are different. The spectrum of the traditional lighting equipment contains more infrared and ultraviolet components which are not suitable for plant absorption and can generate more heat, and the LED can emit monochromatic light required by plant photosynthesis, which is the basis for plant biomass and yield formation.
The lighting fixture for microalgae cultivation provided by the patent is designed aiming at the absorption characteristics of different microalgae, green, yellow and orange light required by microalgae cultivation is optimally provided, the requirements of various microalgae cultivation and light environments can be met, and compared with the existing fluorescent lamp and single-spectrum LED lighting fixture, the lighting fixture for microalgae cultivation has higher spectrum absorption efficiency and flexible use and has wide application value.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 5. It should be noted that the drawings provided in the present embodiment are only schematic and illustrate the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, quantity and proportion of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
The first embodiment is as follows:
the present invention provides a lighting fixture for microalgae cultivation as shown in fig. 1 to 3, comprising: the lighting fixture comprises a lighting fixture component and at least one LED lamp bead arranged on the lighting fixture component, wherein the lighting fixture at least has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
The lighting fixture for cultivating the microalgae has the emission spectrum curve which is not only matched with the absorption spectrum curves of the chlorophyll and the phycobilin of the microalgae, but also has high light energy utilization efficiency, can meet the absorption of different microalgae, has good adaptability and is suitable for mass production.
The wavelength range of the red light in the embodiment is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm.
The lighting fixture can realize the light-emitting characteristics of a), b), c) and d) in various ways, and in the implementation, the lighting fixture comprises one LED lamp bead, and a single LED lamp bead has the light-emitting characteristics of a), b), c) and d).
In the embodiment, the LED lamp bead comprises a chip support 6, a lead 10 and a blue chip 5 with a peak wavelength of 400nm-500nm, wherein a reflection cup 7 is arranged on the chip support 6, the blue chip 5 is arranged on the cup bottom of the reflection cup 7, the lead 10 is connected with the blue chip 5 and pins 9 at two ends, and the fluorescent material is arranged in the reflection cup 7.
The chip 5 in the present invention may be a high-power chip 5, but considering that the 450nm blue chip 5 with medium and small power (less than or equal to 0.5W) has the highest photoelectric conversion efficiency and high cost performance, the blue chip 5 in this embodiment is a blue medium and small-power chip with 0.5W or less than 450 nm.
The fluorescent material in the present invention may be provided in various forms, such as a fluorescent layer coated on the inner wall of the reflective cup 7, which is capable of partially exciting the light emitted from the blue chip 5, and may be formed by combining the excitation light having a wavelength of 500nm to 660nm after excitation and the non-excited blue light directly emitted from the blue chip 5 having a wavelength of 400nm to 500nm into a broad spectrum having the four characteristics of a), b), c) and d).
The fluorescent material in the present invention can be a conventional fluorescent material in the art, such as an aluminate (YAG derivative, LuAG derivative), silicate, nitride, oxynitride, etc. upconversion material, but it is preferable that the fluorescent material in the present embodiment is prepared by using 540nm series green phosphor and nitride 640nm red phosphor, and by the following steps:
1) mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture;
2) taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel according to a ratio of 1.5-2.5: 7.5-8.5 to fully form a fluorescent powder silica gel mixture;
3) and then the fluorescent powder silica gel mixture is dripped into the reflecting cup 7 to be solidified into corresponding fluorescent particles 8.
In the target lamp bead prepared by the method, fluorescent powder particles are suspended in silica gel, one part of blue light emitted by the blue chip 5 is excited by the fluorescent material, the other part of the blue light is directly transmitted out of the silica gel, and the excited excitation light and the un-excited light transmitted out of the silica gel are combined into the broad spectrum with the four characteristics of a), b), c) and d). The spectrum with the wavelength between 500nm and 660nm in the broad spectrum is formed by exciting and converting a fluorescent material, the peak wavelength of the spectrum of a tested target lamp bead is between 440nm and 460nm, the yellow-green part of the spectrum is smooth, the absolute difference between the peak and the valley of the relative spectrum between 500nm and 660nm is less than 0.25, and the radiation energy ratio R/B, R/G of red light and blue light or green light is between 0.5 and 1.
Example two:
as shown in fig. 4 to 5, the present embodiment provides an LED lighting fixture for microalgae cultivation, including a lighting structure assembly and a plurality of LED beads 1, where each LED bead 1 is the LED bead described in the first embodiment, and each LED bead has four kinds of light emitting characteristics, i.e., a), b), c), and d), described in the first embodiment. Illumination structure subassembly includes printed circuit board 2, driver part 4, heat radiation structure 3, many LED lamp pearl 1 passes through reflow soldering and connects on printed circuit board 2 to it is dampproofing to coat transparent silica gel around the pad, driver part 4 drives printed circuit board 2.
The heat dissipation structural member 3 of the LED lighting fixture of the present invention may be any one of die-cast aluminum, extruded and drawn aluminum, high thermal conductivity plastic, and graphite, and preferably is die-cast aluminum with good heat dissipation in this embodiment.
The driving component 4 in this embodiment is a constant current conversion circuit to convert a high-voltage alternating current or direct current power supply into a current suitable for the LED lamp beads 1, and is connected to and drives the printed circuit board 2 welded with a plurality of LED lamp beads 1.
The light emitting units of the lighting apparatus in this embodiment all adopt the LED lamp beads for microalgae cultivation described in the first embodiment, and the color temperature of the lighting apparatus is 5000K-6000K.
Example three:
the embodiment provides a manufacturing method of a lighting fixture for microalgae cultivation, the lighting fixture comprises at least one LED lamp bead, and each LED lamp bead has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
The structure of the LED lamp bead is shown in figure 3, and the manufacturing process of the LED lamp bead at least comprises the following steps:
a blue chip 5 with the peak wavelength between 400nm and 500nm is arranged at the bottom of a reflecting cup 7 of a chip support 6, and the chip 5 is electrically connected with pins at two ends through a lead 10;
dripping the fluorescent powder silica gel mixture into the reflecting cup 7 and curing into corresponding fluorescent particle bodies 8;
the LED lamp beads have the light-emitting characteristics in a), b), c) and d) through adjusting the proportional relation of the fluorescent materials in the fluorescent powder silica gel mixture.
The preparation method of the fluorescent powder silica gel mixture comprises the following steps:
mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture; and taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel according to a ratio of 1.5-2.5: 7.5-8.5 to form a fluorescent powder silica gel mixture.
The single lamp bead prepared by the method has a spectrum peak wavelength of 440-460 nm through testing, a yellow-green part of the spectrum is smooth, the absolute difference value of peaks and valleys of the relative spectrum between 500 nm-660nm is less than 0.25, and the radiation energy ratio R/B, R/G of red light and blue light or green light is 0.5-1.
In this embodiment, the position of the second peak between 500nm and 660nm can be adjusted by adjusting the proportional relationship between the green phosphor and the red phosphor.
Example four:
as shown in fig. 4-5, this embodiment provides a lighting fixture for microalgae cultivation, the lighting fixture includes a lighting structure assembly and a plurality of LED beads with different colors and different color temperatures installed on the lighting structure assembly, and the plurality of LED beads with different colors and different color temperatures have the following light-emitting characteristics after being combined:
a) the spectrum with the wavelength between 500nm and 660nm is partially formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
It should be noted that, the plurality of beads with different colors and different color temperatures in the lighting fixture of the present invention may be beads with different color temperatures generated by adding fluorescent powder, similar to the daily lighting, or may be single blue + red + white beads with different color temperatures, as long as they emit light together, they satisfy the four characteristics of a), b), c), and d). In this embodiment, a lamp bead having a color temperature of 2700K and a spectrum as shown in fig. 6, a lamp bead having a color temperature of 6500K and a spectrum as shown in fig. 7, and a non-phosphor excited red LED (a spectrum curve is shown in fig. 8) are mixed according to a ratio of 1:7:1, so as to obtain four characteristic spectra as shown in fig. 9, including a), b), c), and d).
It should be further noted that the wavelength range of the red light in this embodiment is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm.
In the light emitting characteristic a) of the LED lighting device in this embodiment, part of the spectrum between 500-660nm is formed by excitation and conversion of the fluorescent material, that is, one part of the spectrum between 500-660nm is formed by excitation and conversion of 2700K and 6500K lamp beads by the fluorescent material, and the other part is red light emitted by the red LED chip itself excited by the non-fluorescent powder.
Preferably, the lighting structure assembly in this embodiment includes a printed circuit board 2, a driving component 4, and a heat dissipation structure member 3, the plurality of LED lamp beads 1 with different colors and different color temperatures are array-welded on the printed circuit board 2, and the driving component 4 drives the printed circuit board 2.
The heat dissipation structure 3 may be made of die-cast aluminum, extruded and drawn aluminum, high thermal conductivity plastic, graphite, or other materials, and preferably, the heat dissipation structure is made of die-cast aluminum with good heat dissipation.
The driving part 4 in this embodiment is a constant current conversion circuit to convert a high-voltage alternating current or direct current power supply into a current suitable for the LED lamp bead 1, and is connected to and drives the printed circuit board 2 welded with the LED lamp bead 1.
Example five:
the embodiment provides a manufacturing method of a lighting fixture for microalgae cultivation, which comprises the following steps: through the combination adjustment of a plurality of beads with different colors and different color temperatures, which are arranged on the lighting fixture component, the lighting fixture has the following light-emitting characteristics:
a) the spectrum with the wavelength between 500nm and 660nm is completely formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
In the invention, the four characteristic spectrums a), b), c) and d) can be realized by different combination forms of a plurality of beads with different colors and different color temperatures, but in the embodiment, the spectrum with the color temperature of 6500K as shown in FIG. 10 and the spectrum with the color temperature of 1800K as shown in FIG. 11 are mixed according to a ratio of 3:1, so that the spectrum with the characteristics of a), b), c) and d) as shown in FIG. 12 is obtained. Wherein the spectra of 6500K and 1800K lamp beads 500-660nm are all formed by excitation and conversion of fluorescent materials.
The position of the second peak between 500nm and 660nm can be adjusted by changing the number of the lamp beads with different colors in the embodiment.
In this embodiment the lighting structure assembly comprises a printed circuit board, a driving part and a heat dissipation structure member, a plurality of LED lamp beads with different colors and different color temperatures are welded on the printed circuit board, and the driving part drives the printed circuit board.
In conclusion, the emission spectrum curve of the lighting fixture for microalgae cultivation is not only matched with the absorption spectrum curves of the chlorophyll and phycobilin of the microalgae, but also has high light energy utilization efficiency, can meet the absorption of different microalgae, has good adaptability and is suitable for mass production. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (18)
1. A lighting fixture for microalgae cultivation, comprising: the lighting fixture comprises a lighting fixture component and at least one LED lamp bead arranged on the lighting fixture component, wherein the lighting fixture at least has the following light-emitting characteristics:
the wavelength range of the red light is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm;
a) the spectrum with the wavelength between 500nm and 660nm is partially or completely formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
2. The lighting fixture for microalgae cultivation as claimed in claim 1, wherein the fluorescent material is an up-conversion material.
3. The lighting fixture for microalgae cultivation as claimed in claim 2, wherein the up-conversion material comprises one or more of aluminate, silicate, nitride, oxynitride.
4. The lighting fixture for microalgae cultivation as claimed in claim 3, wherein the aluminate includes one or more of YAG derivatives, LuAG derivatives.
5. The lighting fixture for microalgae cultivation as claimed in any one of claims 1 to 4, wherein the LED lamp bead has the light emitting characteristics as claimed in claim 1.
6. The lighting fixture for microalgae cultivation as claimed in claim 5, wherein the LED lamp bead comprises a chip support, a wire and a blue chip with a peak wavelength of 400nm-500nm, the chip support is provided with a reflection cup, the blue chip is mounted on the bottom of the reflection cup, the wire is connected with the blue chip and pins at two ends, and the fluorescent material is arranged in the reflection cup.
7. The lighting fixture for microalgae cultivation as claimed in claim 6, wherein the blue chip is a chip with a wavelength of 450nm below 0.5W.
8. The lighting fixture for microalgae cultivation as claimed in claim 7, wherein the fluorescent material is prepared by the following method:
mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture; taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel fully according to a ratio of 1.5-2.5: 7.5-8.5 to form a fluorescent powder silica gel mixture, and then dropping the fluorescent powder silica gel mixture into the reflecting cup.
9. The lighting fixture for cultivating microalgae according to any one of claims 1-4, wherein the lighting fixture comprises a plurality of LED beads with different colors and different color temperatures, and the combination of the plurality of LED beads with different colors and different color temperatures has the light-emitting characteristics as set forth in claim 1.
10. The lighting fixture for cultivating microalgae of claim 9, wherein the lighting structure assembly comprises a printed circuit board, a driving component and a heat dissipation structure, the plurality of LED lamp beads with different colors and different color temperatures are welded on the printed circuit board, and the driving component drives the printed circuit board.
11. The lighting fixture for microalgae cultivation as claimed in claim 10, wherein the driving part is a constant current switching circuit.
12. The lighting fixture for microalgae cultivation as claimed in claim 10, wherein the heat dissipation structure is any one of die-cast aluminum, extruded and drawn aluminum, high thermal conductivity plastic, and graphite.
13. The manufacturing method of the lighting fixture for microalgae cultivation is characterized in that the lighting fixture comprises at least one LED lamp bead, and each LED lamp bead has the following light-emitting characteristics:
the wavelength range of the red light is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm;
a) the spectrum with the wavelength between 500nm and 660nm is formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the LED lamp bead, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1; the manufacturing process of the LED lamp bead at least comprises the following steps: a blue chip with a single peak wavelength of 400nm-500nm is arranged at the bottom of a reflecting cup of a chip support, and the chip is electrically connected with pins at two ends through a lead;
dripping the fluorescent powder silica gel mixture into the reflecting cup and curing into corresponding fluorescent particles;
and the lamp beads have the light-emitting characteristic by adjusting the proportional relation of the fluorescent materials in the fluorescent powder silica gel mixture.
14. The method of claim 13, wherein the step of preparing the phosphor-silica gel mixture comprises: mixing and stirring 540nm aluminate series green fluorescent powder and 640nm nitride red fluorescent powder according to the mass ratio of 7.5-8.5: 1.5-2.5 to form a fluorescent powder mixture; and taking the mass parts of the fluorescent powder mixture as a reference, mixing and stirring the fluorescent powder mixture and silica gel according to a ratio of 1.5-2.5: 7.5-8.5 to form a fluorescent powder silica gel mixture.
15. The method of claim 14, wherein the second peak is adjusted to a position between 500nm and 660nm by adjusting a proportional relationship between the green phosphor and the red phosphor.
16. A method for manufacturing a lighting fixture for cultivating microalgae is characterized by comprising the following steps: through the combination adjustment of a plurality of beads with different colors and different color temperatures, which are arranged on the lighting fixture component, the lighting fixture has the following light-emitting characteristics:
the wavelength range of the red light is 600nm to 660 nm; the wavelength range of the blue light is 400nm-500 nm; the wavelength range of the green light is 500nm-600 nm;
a) the spectrum with the wavelength between 500nm and 660nm is partially or completely formed by exciting and converting fluorescent materials;
b) the peak wavelength of the spectrum is between 400nm and 500nm, and the half-wave width of the spectrum is less than 50 nm;
c) the spectrum has a second peak between 500nm and 660nm, and the absolute difference between the peak and the valley of the relative spectrum is less than 0.25;
d) in the spectrum of the lighting fixture, the radiation energy ratio of red light to blue light and the radiation energy ratio of red light to green light are between 0.5 and 1.
17. The manufacturing method of claim 16, wherein the position of the second peak between 500nm and 660nm can be adjusted by changing the number of the beads with different colors.
18. The method of claim 16, wherein the lighting assembly includes a printed circuit board, a driving component, and a heat dissipation structure, the plurality of LED beads with different colors and different color temperatures are soldered on the printed circuit board, and the driving component drives the printed circuit board.
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| CN202210587393.5A CN115046146B (en) | 2019-03-28 | 2019-03-28 | Lighting fixture |
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| PCT/CN2019/080185 WO2020191738A1 (en) | 2019-03-28 | 2019-03-28 | Lighting fixture used for microalgae cultivation and manufacturing method for said lighting fixture |
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| CN115046146A (en) | 2022-09-13 |
| CN115046146B (en) | 2023-05-23 |
| CN111164344A (en) | 2020-05-15 |
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