Light storage plant light supplement lamp based on long afterglow fluorescent powder and preparation method of light storage plant light supplement lamp

Abstract

The invention relates to a light storage plant light supplement lamp based on long afterglow fluorescent powder and a preparation method of the light storage plant light supplement lamp, and belongs to the technical field of agricultural lighting. According to the light supplementing lamp, long-afterglow fluorescent powder is adopted as a core material, the surface of an LED chip is coated with the long-afterglow fluorescent powder, the three-channel spectrum adjusting technology is combined, and customized spectrum support is provided for plants by adjusting the intensity proportion of blue light (450 nm), red light (660 nm) and near-infrared light (730 nm). The long-afterglow fluorescent powder is composed of a rare earth activator (such as Cr < 3 + >, Mn < 4 + > and Eu < 3 + >) and a perovskite or garnet matrix, and can continuously emit light for more than 8 hours after power failure, so that the illumination requirement of plants at night is met, and the energy consumption is remarkably reduced. The light supplementing lamp adopts efficient heat dissipation design, the service life of the lamp is prolonged, and the maintenance cost is reduced. The device is especially suitable for scenes of plant factories, greenhouse planting, vertical agriculture and the like, and has the advantages of energy conservation, spectrum adjustability, low heating and long service life.

Description

Technical Field

[0001] The invention relates to the field of modern agricultural lighting technology, in particular to a light-storage plant supplementary light using long afterglow fluorescent materials and LED technology, and belongs to the category of energy-saving and environmentally friendly agricultural facility technology. Background Art

[0002] The development of modern agriculture has put forward higher requirements for plant supplementary lighting, but the existing supplementary lighting has the following main problems:

[0003] 1. High energy consumption: Traditional high-pressure sodium lamps or ordinary LED lamps have high operating costs and low energy utilization efficiency.

[0004] 2. Heat problem: High heat output may cause plant burns and increase the energy consumption of cooling equipment.

[0005] 3. Single spectrum: Unable to provide customized spectrum support for different plants, which reduces plant growth efficiency.

[0006] 4. Short lifespan: Traditional lamps are easily damaged due to heat accumulation and long-term operation, which increases maintenance costs.

[0007] Long afterglow fluorescent materials are widely used in new lighting fields due to their unique energy storage and afterglow luminescence characteristics. The present invention combines long afterglow fluorescent powder with LED technology to design a light storage plant fill light, which achieves comprehensive optimization of energy saving, adjustable spectrum, low heat generation and long life. Summary of the invention

[0008] The present invention aims to solve the problems of high energy consumption, single spectrum and short life of traditional plant fill light, and proposes a light storage plant fill light based on long afterglow phosphor and its preparation method. The main objectives are as follows:

[0009] 1. Energy saving and efficiency improvement: Reduce energy waste and improve overall lighting efficiency through afterglow luminescence.

[0010] 2. Spectral adjustment: Provide customizable spectrum to meet the diverse needs of plant growth cycle.

[0011] 3. Extend life: reduce the heat generated by the lamp, extend its service life and reduce maintenance frequency.

[0012] 4. Low environmental impact: Use green and environmentally friendly materials to reduce the carbon footprint of agricultural production.

[0013] The plant supplementary light of the present invention is composed of the following key components:

[0014] 1. Long afterglow phosphor: the core material is Cr 3+ , Mn 4+ 、Eu 3+It is made of a perovskite or garnet matrix doped with rare earth activators such as quartz and tantalum, which can release the stored light energy after power is cut off.

[0015] 2.LED light source module: Using surface mount packaging (SMD) technology, the phosphor is covered on the surface of the high-efficiency LED chip, and the wavelength is designed to be 450nm (blue light), 660nm (red light) and 730nm (near infrared light).

[0016] 3. Spectral regulation control system: equipped with an independent three-channel driving power supply, which controls the luminous intensity of light of different wavelengths by adjusting the voltage ratio to form a spectrum that suits the needs of various plants.

[0017] 4. Lamp structure design: Aluminum alloy heat dissipation shell and light diffusion structure are used to improve lighting uniformity and effectively dissipate heat.

[0018] Technical Effects

[0019] Through technological innovation, the present invention achieves the following advantages:

[0020] 1. Energy saving: After power failure, the afterglow continues for more than 8 hours, saving 44% of electricity.

[0021] 2. Adjustable spectrum: precise control of spectrum ratio to meet the specific needs of plant growth.

[0022] 3. Extended life: Through heat dissipation optimization and afterglow supplement, the life of the lamp is extended by about 50%.

[0023] 4. High efficiency and stability: Long afterglow phosphor improves the stability and sustainability of the light source. DETAILED DESCRIPTION

[0024] 1. Preparation of long afterglow phosphor

[0025] 1) Raw materials and compound structure: Matrix material: Select perovskite structure A2BB′O6 or garnet structure A3B2(SiO4)3 compound, where A is Ca 2+ , Sr 2+ , Ba 2+ A single or combined component; B is Al 3+ , Ga 3+ Sc 3+ A single or combined component; B' is Ti 4+ 、Zr 4+ Single or combined components. Rare earth activator: Cr 3+ (0.1-1.0 mol%), Mn 4+ (0.05-0.5mol%) and Eu 3+(0.2-2.0 mol%). The matrix material is used to provide a stable crystal structure, and the rare earth activator is used to enhance the long afterglow fluorescence performance.

[0026] 2) Mixing and ball milling: Mix the matrix material (such as CaTiO3 or SrAl2O4) and the activator (such as Cr2O3, MnO2 and Eu2O3) in the following proportions: the matrix material accounts for 70-80% of the total weight, Cr 3+ 0.1-1.0 mol%Mn 4+ 0.05-0.5mol%,Eu 3+ The content of the precursor is 0.2-2.0 mol%. High-purity anhydrous ethanol is used as a dispersant. All raw materials are placed in a planetary ball mill. The ball milling time is 12-16 hours and the rotation speed is 200-400 rpm. After ball milling, a uniform precursor mixture is formed.

[0027] 3) High-temperature calcination: The mixed powder is placed in an alumina crucible, and the temperature is gradually raised to 800-1000°C in a muffle furnace, and kept warm for 4-6 hours to complete the crystal phase formation. After calcination, it is slowly cooled to room temperature, and the obtained material is a long afterglow phosphor.

[0028] 4) Screening: Use a 200-300 mesh screen to screen the phosphor to remove large particles of uneven materials and obtain long afterglow phosphor with uniform particle size.

[0029] 2. Manufacturing of LED lamp beads

[0030] 1) Preparation of LED chips: High-efficiency LED chips with luminous wavelengths of 450nm (blue light), 660nm (red light) and 730nm (near infrared light) are selected. The chip surface is cleaned with deionized water and then metal is evaporated and etched to form a conductive layer and a reflective layer.

[0031] 2) Mixing phosphor with polymer: In an automatic dispensing machine, mix the long afterglow phosphor with a polymer matrix (such as epoxy resin or silicone rubber) at a powder to polymer mass ratio of 3:1. The mixing process needs to be kept at a low temperature (25-35°C) to avoid bubbles. The role of the polymer matrix is ​​to evenly distribute and adhere the phosphor to the surface of the LED chip, while enhancing its mechanical strength and durability.

[0032] 3) Glue dispensing and coating: The mixed phosphor and polymer are evenly coated on the surface of the LED chip through an automatic glue dispensing machine. The coating thickness is controlled within the range of 20-50μm to ensure the uniformity of the spectral output and the afterglow effect.

[0033] Heat and cure at 120-150°C for 30 minutes to form a stable luminescent layer.

[0034] 4) Packaging and testing: The packaging method is surface mount packaging (SMD), which packages the chip coated with phosphor onto a circuit substrate.

[0035] The photoelectric performance of the packaged LED lamp beads is tested to ensure that the spectral output meets the design requirements of 450nm, 660nm and 730nm, and to verify that the afterglow duration meets the performance indicator of at least 8 hours.

[0036] 3. Assembly of fill light

[0037] 1) Circuit design: The PCB circuit board is divided into three independent channels, each channel corresponds to blue light, red light and near-infrared light LED lamp beads, and is connected to the programmable controller.

[0038] 2) Lamp assembly: Install the light diffuser and lamp module in the aluminum alloy heat sink to ensure even light distribution and efficient heat dissipation.

[0039] Spectrum Adjustment

[0040] 1. The user adjusts the three-channel driving power supply voltage through the controller to adjust the proportion of blue light, red light and near-infrared light respectively.

[0041] 2. Select the corresponding spectrum ratio according to the plant growth stage (such as seedling stage, flowering stage, fruit ripening stage) to optimize the photosynthesis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 :Model diagram of light-emitting chip

[0043] Figure 2 : Single light bar model diagram

[0044] Figure 3 :Product model display

[0045] Figure 4 : Schematic diagram of the lighting effect of the lamp after power failure.

Claims

1. A light storage plant fill light based on long afterglow phosphor, comprising long afterglow phosphor, LED light source module, three-channel independent driving power supply and aluminum alloy heat dissipation lamp housing, characterized in that: 1) Long afterglow phosphor with rare earth ion activator Cr 3+ , Mn 4+ 、Eu 3+ As the core doping element, Cr 3+ The content is 0.1-1.0mol%Mn 4+ Content is 0.05-0.5mol%Eu 3+ The content is 0.2-2.0 mol%. The matrix is ​​a perovskite structure with a chemical formula of A2BB′O6 or a garnet structure with a chemical formula of A3B2(SiO4)3, where A is Ca 2+ , Sr 2+ , Ba 2+ One or more of, B is Al 3+ , Ga 3+ Sc 3+ One or more of, B' is Ti 4+ 、Zr 4+ One or more of; 2) The LED light source module adopts surface mount packaging (SMD) technology, and long afterglow phosphor is coated on the surface of LED chips with wavelengths of 450nm, 660nm and 730nm; 3) The three-channel driver power supply independently adjusts the intensity ratio of blue light, red light and near-infrared light to meet the lighting requirements of different plant growth stages; 4) The aluminum alloy heat dissipation lamp housing has a light diffusion structure to improve lighting uniformity and efficiently dissipate heat.

2. The light storage plant supplementary light according to claim 1, characterized in that The preparation method of the long afterglow phosphor comprises the following steps: 1) Mixing and ball milling: Mix the raw materials according to the following mass percentages: 70-80% matrix material, rare earth activator Cr 3+ 0.1-1.0%, Mn 4+ 0.05-0.5%, Eu 3+ 0.2-2.0%, the raw materials are placed in a planetary ball mill and milled for 12-16 hours; 2) High temperature calcination: the mixture is placed in a muffle furnace and calcined at a temperature range of 800-1000°C for 4-6 hours, and after cooling, a long afterglow phosphor is obtained; 3) Screening treatment: The calcined powder is screened and phosphors with a particle size range of 200-300 mesh are selected for subsequent applications.

3. The light storage plant supplementary light according to claim 1, characterized in that The preparation of the LED light source module includes the following steps: 1) LED chip processing: Select LED chips with emission wavelengths of 450nm, 660nm and 730nm, and undergo cleaning, metal evaporation and etching; 2) Phosphor coating: The prepared long afterglow phosphor is evenly coated on the surface of the LED chip by spraying or dispensing process, and the coating thickness is controlled within the range of 20-50 μm; 3) Curing and packaging: The coated LED chip is heated and cured at 120-150°C for 30 minutes, and then made into LED lamp beads through surface mount packaging technology (SMD).

4. The light storage plant supplementary light according to claim 1, characterized in that The design and application of three-channel independent drive power supply include: 1) Channel configuration: independently control blue light (450nm), red light (660nm) and near-infrared light (730nm) light sources; 2) Adjustment range: The output power range of each channel is 1-10W, and the voltage adjustment range is 3-24V; 3) Spectral regulation: The spectral ratio can be dynamically adjusted through a programmable controller. The light intensity ratio of blue light, red light and near-infrared light can be varied in the range of 1:1:1 to 4:4:

2.

5. A method for preparing a light storage plant supplementary light, characterized in that The following steps are involved: 1) Preparation of long afterglow phosphor: preparing the long afterglow phosphor according to the method of claim 2; 2) Manufacturing of LED lamp beads: coating and encapsulating the phosphor onto the surface of the LED chip according to the steps of claim 3; 3) Assembly of the lamp: Install the three-channel independent circuit module on the PCB circuit board, connect the LED lamp beads by welding, then assemble the light diffuser and the aluminum alloy heat dissipation shell, and embed the LED lamp bead module into it; 4) Setting of spectrum regulation module: Connect the programming controller to the driving power supply to complete the assembly of the regulation module.

6. The light storage plant supplementary light according to claim 1, characterized in that The spectrum adjustment of the lamp is suitable for the following plant growth stages: Seedling stage: The ratio of blue light, red light and near-infrared light is set to 4:2:1 to promote root growth and stem and leaf development; Flowering period: The ratio of blue light, red light and near-infrared light is set to 1:4:1 to increase the flowering rate; Fruiting period: The ratio of blue light, red light and near-infrared light is set to 1:4:2 to improve fruit enlargement and color uniformity.

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