A lighting device based on Fresnel lens

Abstract

The present invention is realized by the following technical scheme: a lighting device based on a Fresnel lens, comprising a Fresnel lens, a light trap mechanism connected to the bottom of the Fresnel lens, a filter connected to the bottom of the light trap mechanism, a spectrometer connected to the filter, and a plurality of optical cables connected to the spectrometer; the light trap mechanism comprises a circular ring reflector, a truncated cone lens, a second conical reflector, a conical lens and a first conical reflector, a truncated cone lens is fixed on the top of the second conical reflector, a circular ring reflector is fixed on the top of the second conical reflector outside the truncated cone lens, and a first conical reflector is arranged inside the second conical reflector. The advantages of the present invention are that it can not only more effectively utilize solar energy resources, but also improve the production efficiency of vertical agriculture; the design can also reduce energy costs and help promote vertical agriculture to develop in a more sustainable direction.

Description

Technical Field

[0001] The invention relates to the technical field of light processing equipment, and in particular to a lighting device based on a Fresnel lens. Background Art

[0002] As a new initiative in modern urban agriculture, vertical agriculture adopts high-rise or three-dimensional development mode, uses renewable resources and greenhouse technology to simulate the outdoor growth environment to promote the growth of crops. The development of vertical agriculture helps to improve social, ecological and economic benefits, and has become an important solution to the problem of sustainable agriculture.

[0003] One of the main challenges facing vertical farming is controlling production costs, especially energy costs. Although vertical planting can reduce the demand for fossil energy, the operation of a large number of LED lights requires a lot of electricity, so it takes about 38.8kw·h of energy to produce 1kg of food in a vertical farm. These high production costs result in the selling price of products being several times higher than traditional agricultural products. We can significantly reduce the production costs of vertical farming by utilizing solar energy. Current vertical farming systems have not yet fully utilized solar energy to provide light for plants.

[0004] Traditional Fresnel lenses are usually used for photovoltaic power generation rather than directly utilizing light energy, and the energy conversion process results in a lot of energy waste. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a lighting device based on a Fresnel lens.

[0006] The technical solution of the present invention is as follows: a lighting device based on a Fresnel lens, comprising a Fresnel lens, a light trap mechanism is connected to the bottom of the Fresnel lens, a filter is connected to the bottom of the light trap mechanism, a beam splitter is connected to the filter, and a plurality of optical cables are connected to the beam splitter;

[0007] The light trap mechanism includes a ring reflector, a truncated cone lens, a second conical reflector, a conical lens and a first conical reflector, the second conical reflector is fixed with a truncated cone lens on the top, the second conical reflector is fixed with a ring reflector on the top outside the truncated cone lens, the second conical reflector is provided with a first conical reflector inside, the first conical reflector is fixed with a conical lens on the top, and the first conical reflector and the second conical reflector are concentrically arranged.

[0008] Preferably, the bottom end of the first conical reflector and the bottom end of the second conical reflector are in the same plane.

[0009] Preferably, the bottom end of the first conical reflector is located inside the second conical reflector, and a reverse conical lens is connected to the bottom of the first conical reflector.

[0010] Preferably, the bottom end of the first conical reflector is located inside the second conical reflector, and a relay lens is connected to the bottom of the first conical reflector. The relay lens includes an annular portion and a conical portion. The conical portion is provided with an annular portion bottom, and the annular portion is sleeved on the bottom of the first conical reflector.

[0011] Preferably, a cooling water pipe is spirally wound on the outer wall of the first conical reflector, the cooling water pipe is connected to a water tank, and water in the cooling water pipe flows and is transported from bottom to top.

[0012] Preferably, a lens frame is fixed on the outer side of the Fresnel lens, and two sides of the lens frame are rotatably connected to a support frame, and the support frame is provided with a pitch angle adjuster for driving the Fresnel lens to rotate vertically.

[0013] Preferably, the support frame and the water tank are both fixed on a rotation angle adjuster, and the rotation angle adjuster drives the Fresnel lens to rotate in a horizontal direction.

[0014] Preferably, a limiter is provided between the first conical reflector and the second conical reflector, and the limiter comprises a large ring arranged to fit the inner wall of the second conical reflector and a small ring arranged to fit the outer wall of the first conical reflector, and the large ring and the small ring are fixed by a fixing rod.

[0015] Preferably, a photosensitive element is provided on the Fresnel lens, and an output end of the photosensitive element is electrically connected to input ends of the rotation angle adjuster and the pitch angle adjuster.

[0016] Preferably, the outer side of the circular reflector is a light-shielding material, and the inner side is a reflector;

[0017] The outer side of the truncated cone lens is a lens, and the inner side is a reflector, so light can only enter but not exit;

[0018] The outer side of the second conical reflector is a light-shielding material, and the inner side is a reflector;

[0019] The outer side of the conical lens is a lens, and the inner side is a reflector, so light can only enter but not exit;

[0020] The inner and outer sides of the second conical reflector are both reflectors.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A light-guiding system that uses the Fresnel lens focusing principle and the light trap lighting principle. This system uses Fresnel lenses to focus solar energy and transmits light energy to vertical agricultural plants through light traps and light guides. In this way, we can not only use solar energy resources more effectively, but also improve the production efficiency of vertical agriculture. This design can also reduce energy costs and help promote vertical agriculture in a more sustainable direction.

[0023] 2. A water cooling mechanism is provided on the outer wall of the light trap mechanism. When the light trap mechanism is in use, the surface of the light trap mechanism can be quickly cooled by the water cooling mechanism, so as to maintain the long-term use of the entire device and achieve better practical application effects.

[0024] 3. Light processed by Fresnel lens, light trap mechanism, filter and spectrometer can emit light of different wavelengths, thus adapting to different plants to ensure that plants get sufficient light during the growth process, thereby promoting their healthy growth and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0026] Figure 1 It is a structural schematic diagram of a lighting device based on a Fresnel lens of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the water tank connected to the cooling water pipe of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the light trap mechanism and the cooling water pipe when they are connected in the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the light trap mechanism of Example 1 of the present invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of the light trap mechanism of Example 2 of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the light trap mechanism of Example 3 of the present invention;

[0032] Figure 7 It is a schematic diagram of the light of the present invention when it is located directly above the first conical reflector;

[0033] Figure 8 It is a schematic diagram of the light of the present invention when it is located directly above the second conical reflector.

[0034] Explanations in the figure: 10. Fixed base; 20. Rotation angle adjuster; 30. Support frame; 40. Pitch angle adjuster; 50. Fresnel lens; 51. Photosensitive element; 52. Mirror frame; 60. Light trap mechanism; 61. Ring reflector; 62. Cone lens; 63. Second conical reflector; 64. Conical lens; 65. First conical reflector; 70. Cooling water pipe; 80. Filter; 90. Optical cable; 91. Spectrum splitter; 100. Water tank; 110. Reverse conical lens; 120. Relay lens. DETAILED DESCRIPTION

[0035] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention. Example 1

[0036] like Figure 1-3 As shown, a lighting device based on a Fresnel lens includes a Fresnel lens 50, a light trap mechanism 60 is connected to the bottom of the Fresnel lens 50, a filter 80 is connected to the bottom of the light trap mechanism 60, a beam splitter 91 is connected to the beam splitter 91, and a plurality of optical cables 90 are connected to the beam splitter 91;

[0037] The light is gathered by the Fresnel lens 50 and the light trap mechanism 60, and the filter 80 is used to obtain the light wavelength required by the specific plant, so as to obtain effective light energy. This step is very important because different types of plants have different requirements for light. Some plants need more red light, while others need more blue light. By setting the filter 80, it can be ensured that the wavelength of the light meets the growth requirements of the plant, so as to maximize the utilization efficiency of light energy. Once the effective light is obtained, the next role is the beam splitter 91. The beam splitter 91 can guide the light to each cultivation tray separately to ensure that each plant can fully obtain the required light. This precise light distribution is an important part of the indoor plant cultivation system, which can ensure that the plants obtain sufficient light during the growth process, thereby promoting their healthy growth and development.

[0038] like Figure 4As shown, the light trap mechanism 60 includes a ring reflector 61, a truncated cone lens 62, a second conical reflector 63, a conical lens 64 and a first conical reflector 65. The second conical reflector 63 is fixed with the truncated cone lens 62 on the top, the second conical reflector 63 is located on the outside of the truncated cone lens 62 and the ring reflector 61 is fixed on the top, the first conical reflector 65 is arranged inside the second conical reflector 63, the first conical reflector 65 is fixed with the conical lens 64 on the top, and the first conical reflector 65 and the second conical reflector 63 are concentrically arranged.

[0039] The outer side of the annular reflector 61 is made of shading material, and the inner side is a reflector; the outer side of the truncated cone lens 62 is a lens, and the inner side is a reflector, and light can only enter but not exit; the outer side of the second conical reflector 63 is made of shading material, and the inner side is a reflector; the outer side of the conical lens 64 is a lens, and the inner side is a reflector, and light can only enter but not exit; the inner and outer sides of the first conical reflector 65 are reflectors.

[0040] The bottom end of the first conical reflector 65 and the bottom end of the second conical reflector 63 are in the same plane.

[0041] like Figure 1 As shown, a frame 52 is fixed to the outside of the Fresnel lens 50, and both sides of the frame 52 are rotatably connected to the support frame 30. The support frame 30 is provided with a pitch angle adjuster 40 for driving the Fresnel lens 50 to rotate vertically. The rotation angle adjuster 20 is placed as a whole on the fixed base 10, and the position of the rotation angle adjuster 20 is restricted by the fixed base 10.

[0042] The support frame 30 and the water tank 100 are both fixed on the rotation angle adjuster 20, and the rotation angle adjuster 20 drives the Fresnel lens 50 to rotate in the horizontal direction.

[0043] Specifically, by adopting the light trap mechanism 60 of this structural setting, the device can collect light from different directions, so that the light intensity irradiating the plants is higher, which is beneficial to the growth and development of the plants. In addition, the automatic adjustment function of the device can also reduce the need for manual intervention, improve utilization efficiency and reduce maintenance costs.

[0044] After passing through the Fresnel lens 50, the light will be focused to a focal point. Then, a light trap mechanism 60 is added at a distance in front of the focal point. The cone angle of the second conical reflector 63 of the lower layer is greater than or equal to the first conical reflector 65 of the lower layer to ensure that the light can be transmitted normally. The light entering the light trap mechanism 60 has a variety of different directions. Therefore, the invention adopts different strategies according to the different angles of the light. When the light directly enters the interior of the light trap mechanism 60, the light will be transmitted all the way to the bottom by the second conical reflector 63 and the first conical reflector 65 of the lower layer.

[0045] like Figure 7As shown, when light enters from directly above the first conical reflector 65, it will be absorbed by the conical lens 64, and then transmitted to the bottom through the reflection of the conical lens 64 on the upper layer and the first conical reflector 65 on the lower layer;

[0046] like Figure 8 As shown, when light enters the light trap mechanism 60 at an oblique angle, it will be absorbed by the frustum lens 62, and then transmitted through the second conical reflector 63, and finally repeat the above transmission process;

[0047] The flexibility and diversity of the light trap design enables the light trap device to effectively capture and guide light at various angles, providing more possibilities for the application of optical systems.

[0048] A photosensitive element 51 is arranged on the Fresnel lens 50. In conjunction with the settings of the rotation angle adjuster 20 and the pitch angle adjuster 40, the light-facing angle of the Fresnel lens 50 can be adjusted according to the intensity of sunlight. When the intensity of sunlight changes, the photosensitive element 51 can sense the change in light and send a signal to the rotation angle adjuster 20 and the pitch angle adjuster 40 to adjust the angle of the Fresnel lens 50 to obtain the best lighting effect. This structural setting always maintains the best light collection efficiency, improves the utilization rate of light energy, and provides a more stable and efficient light energy receiving solution for the application. Example 2

[0049] like Figure 1 As shown, a lighting device based on a Fresnel lens includes a Fresnel lens 50, a light trap mechanism 60 is connected to the bottom of the Fresnel lens 50, a filter 80 is connected to the bottom of the light trap mechanism 60, a beam splitter 91 is connected to the beam splitter 91, and a plurality of optical cables 90 are connected to the beam splitter 91;

[0050] like Figure 4 As shown, the light trap mechanism 60 includes a ring reflector 61, a truncated cone lens 62, a second conical reflector 63, a conical lens 64 and a first conical reflector 65. The second conical reflector 63 is fixed with the truncated cone lens 62 on the top, the second conical reflector 63 is located on the outside of the truncated cone lens 62 and the ring reflector 61 is fixed on the top, the first conical reflector 65 is arranged inside the second conical reflector 63, the first conical reflector 65 is fixed with the conical lens 64 on the top, and the first conical reflector 65 and the second conical reflector 63 are concentrically arranged.

[0051] like Figure 5 As shown, the bottom end of the first conical reflector 65 is located inside the second conical reflector 63 , and a reverse conical lens 110 is connected to the bottom of the first conical reflector 65 .

[0052] This structural setting can prevent the bottom from overheating. By adding a reverse conical lens 110, the reverse conical lens 110 has a lens on the outside and a reflector on the inside, which can converge the bottom side light into the reverse conical lens 110, increase the light-emitting area, and reduce heat generation.

[0053] A lens frame 52 is fixed to the outside of the Fresnel lens 50 . Both sides of the lens frame 52 are rotatably connected to the support frame 30 . The support frame 30 is provided with a pitch angle adjuster 40 for driving the Fresnel lens 50 to rotate vertically.

[0054] The support frame 30 and the water tank 100 are both fixed on the rotation angle adjuster 20, and the rotation angle adjuster 20 drives the Fresnel lens 50 to rotate in the horizontal direction. Example 3

[0055] like Figure 1-3 As shown, a lighting device based on a Fresnel lens includes a Fresnel lens 50, a light trap mechanism 60 is connected to the bottom of the Fresnel lens 50, a filter 80 is connected to the bottom of the light trap mechanism 60, a beam splitter 91 is connected to the beam splitter 91, and a plurality of optical cables 90 are connected to the beam splitter 91;

[0056] like Figure 4 As shown, the light trap mechanism 60 includes a ring reflector 61, a truncated cone lens 62, a second conical reflector 63, a conical lens 64 and a first conical reflector 65. The second conical reflector 63 is fixed with the truncated cone lens 62 on the top, the second conical reflector 63 is located on the outside of the truncated cone lens 62 and the ring reflector 61 is fixed on the top, the first conical reflector 65 is arranged inside the second conical reflector 63, the first conical reflector 65 is fixed with the conical lens 64 on the top, and the first conical reflector 65 and the second conical reflector 63 are concentrically arranged.

[0057] like Figure 6 As shown, the bottom end of the first conical reflector 65 is located inside the second conical reflector 63 , and a relay lens 120 is connected to the bottom of the first conical reflector 65 . The relay lens 120 includes an annular portion and a conical portion. The conical portion is provided at the bottom of the annular portion, and the annular portion is sleeved on the bottom of the first conical reflector 65 .

[0058] The cone angle of the second conical reflector 63 is greater than that of the first conical reflector 65. By setting the relay lens 120, the light can be normally introduced into the bottom of the light trap. Through this structural setting, the light trap mechanism 60 can have a wider range of applications.

[0059] A lens frame 52 is fixed to the outside of the Fresnel lens 50 . Both sides of the lens frame 52 are rotatably connected to the support frame 30 . The support frame 30 is provided with a pitch angle adjuster 40 for driving the Fresnel lens 50 to rotate vertically.

[0060] The support frame 30 and the water tank 100 are both fixed on the rotation angle adjuster 20, and the rotation angle adjuster 20 drives the Fresnel lens 50 to rotate in the horizontal direction. Example 4

[0061] On the basis of Example 1, Example 2 or Example 3, Figure 1 and Figure 3 As shown, a cooling water pipe 70 is spirally wound on the outer wall of the first conical reflector 65 , and the cooling water pipe 70 is connected to the water tank 100 , and the water in the cooling water pipe 70 flows from bottom to top.

[0062] Due to the focusing effect of the Fresnel lens, the energy density of the light is high, so the heat generated by the light trap also increases accordingly. Therefore, a cooling system needs to be introduced to ensure the normal operation of the equipment. The cooling system is composed of a water tank 100 and a cooling water pipe 70, which effectively reduces the temperature of the light trap.

[0063] A cooling water pipe 70 is pre-arranged on the light trap mechanism 60, which makes the inner surface of the entire light trap mechanism 60 more comprehensive and uniform, thereby improving the cooling effect and effectively reducing the heat generated by the device under high-energy-density light. This mechanism setting can not only improve the stability and durability of the equipment, but also effectively extend the service life of the equipment and reduce maintenance costs and energy consumption.

[0064] In general, the cooling system of the present invention can fully utilize the arrangement of the cooling water pipe 70 to achieve comprehensive cooling of the light trap mechanism 60, thereby improving the performance and reliability of the equipment and bringing new breakthroughs to the technical development of related fields.

[0065] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A lighting device based on a Fresnel lens, characterized in that: Comprising a Fresnel lens (50), the bottom of the Fresnel lens (50) being connected to a light trap mechanism (60), the bottom of the light trap mechanism (60) being connected to an optical filter (80), the optical filter (80) being connected to a beam splitter (91), and the beam splitter (91) being connected to a plurality of optical cables (90); The light trap mechanism (60) comprises a ring reflector (61), a truncated cone lens (62), a second conical reflector (63), a conical lens (64) and a first conical reflector (65); the second conical reflector (63) has a truncated cone lens (62) fixed on its top; the second conical reflector (63) has a ring reflector (61) fixed on its top outside the truncated cone lens (62); the second conical reflector (65) has a first conical reflector (65) arranged inside; the first conical reflector (65) has a conical lens (64) fixed on its top; and the first conical reflector (65) and the second conical reflector (63) are arranged concentrically; The Fresnel lens (50) converges the light emitted by the light source to the entrance of the light trap mechanism (60), thereby improving the light energy collection efficiency. The light trap mechanism (60) captures the converged light and transmits it to the bottom of the light trap mechanism (60) through the provided annular reflector (61), a truncated cone lens (62), a second conical reflector (63), a conical lens (64) and a first conical reflector (65), thereby reducing light energy loss and providing a stable light energy input for subsequent distribution. The filter (80) performs spectral filtering on the input light, selects a spectrum with a specific wavelength to meet the needs of different plants at different growth stages, thereby improving the light energy utilization efficiency. The optical splitter (91) distributes the filtered light to the plurality of optical cables (90), guides the light energy to reach each cultivation tray, and ensures that each plant can fully obtain the required light to meet the growth and development needs.

2. The Fresnel lens-based lighting device according to claim 1, characterized in that: The bottom end of the first conical reflector (65) and the bottom end of the second conical reflector (63) are located in the same plane.

3. The Fresnel lens-based lighting device according to claim 1, characterized in that: The bottom end of the first conical reflector (65) is located inside the second conical reflector (63), and the bottom of the first conical reflector (65) is connected to a reverse conical lens (110).

4. The lighting device based on a Fresnel lens according to claim 1, characterized in that: The bottom end of the first conical reflector (65) is located inside the second conical reflector (63); the bottom of the first conical reflector (65) is connected to a relay lens (120); the relay lens (120) comprises an annular portion and a conical portion; the conical portion is provided with an annular portion bottom; the annular portion is sleeved on the bottom of the first conical reflector (65).

5. A lighting device based on a Fresnel lens according to any one of claims 1 to 4, characterized in that: A cooling water pipe (70) is spirally wound on the outer wall of the first conical reflector (65); the cooling water pipe (70) is connected to a water tank (100); and water in the cooling water pipe (70) flows and is transported from bottom to top.

6. The lighting device based on a Fresnel lens according to claim 5, characterized in that: A lens frame (52) is fixed to the outside of the Fresnel lens (50), and two sides of the lens frame (52) are rotatably connected to a support frame (30). The support frame (30) is provided with a pitch angle adjuster (40) for driving the Fresnel lens (50) to rotate vertically.

7. The lighting device based on a Fresnel lens according to claim 6, characterized in that: The support frame (30) and the water tank (100) are both fixed on a rotation angle adjuster (20), and the rotation angle adjuster (20) drives the Fresnel lens (50) to rotate in a horizontal direction.

8. A lighting device based on a Fresnel lens according to any one of claims 1 to 4, characterized in that: A stopper is provided between the first conical reflector (65) and the second conical reflector (63), the stopper comprising a large circular ring arranged to fit the inner wall of the second conical reflector (63) and a small circular ring arranged to fit the outer wall of the first conical reflector (65), the large circular ring and the small circular ring being fixed by a fixing rod.

9. The lighting device based on a Fresnel lens according to claim 1, characterized in that: A photosensitive element (51) is provided on the Fresnel lens (50), and an output end of the photosensitive element (51) is electrically connected to input ends of the rotation angle adjuster (20) and the pitch angle adjuster (40).

10. The lighting device based on a Fresnel lens according to claim 1, characterized in that: The outer side of the circular reflector (61) is a light-shielding material, and the inner side is a reflector; The outer side of the truncated cone lens (62) is a lens, and the inner side is a reflector, so that light can only enter but not exit; The second conical reflector (63) has a light-shielding material on the outside and a reflector on the inside; The conical lens (64) has a lens on the outside and a reflector on the inside, so that light can only enter but not exit; The inner and outer sides of the second conical reflector (65) are both reflectors.

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