Photovoltaic agricultural greenhouse

Abstract

The utility model discloses a photovoltaic agricultural greenhouse. The photovoltaic agricultural greenhouse comprises a plurality of agricultural greenhouses and a plurality of photovoltaic modules which are sequentially and alternately arranged, wherein the photovoltaic modules are arranged through the supporting bracket, and a light-transmitting space is reserved between every two adjacent photovoltaic modules; a light scattering plate is arranged on the ceiling of each agricultural greenhouse and used for scattering and uniformizing light rays entering the ceiling of the agricultural greenhouse from the gap between every two adjacent photovoltaic assemblies and then enabling the light rays to enter the agricultural greenhouse. On the basis that the photovoltaic modules and the agricultural greenhouses are alternately arranged at intervals, the ceiling position of each agricultural greenhouse is further provided with a light scattering plate, light with uniform illumination intensity is provided for crops in the agricultural greenhouses, and therefore a good growth environment is provided for shade-loving crops; and economic benefit maximization of photovoltaic power generation and crop growth is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic agricultural greenhouse. Background Art

[0002] As land resources on land are scarce, when installing photovoltaic panels on agricultural land, space and land can be reserved for agricultural planting by using the gaps between the photovoltaic panels. This achieves a "win-win" situation of clean power generation on the panels and efficient planting under the panels without changing the nature of the agricultural land.

[0003] However, in actual applications, especially for crops that prefer shade, although they need a certain amount of light during the growth process, they cannot receive direct strong light. This causes some crops under the photovoltaic modules to fail to grow due to insufficient light, while others die due to excessive light exposure. Utility Model Content

[0004] The purpose of the utility model is to provide a photovoltaic agricultural greenhouse, which can provide a good growth environment for shade-loving crops and maximize the economic benefits of photovoltaic power generation and crop growth.

[0005] In order to solve the above technical problems, the utility model provides a photovoltaic agricultural greenhouse, comprising a plurality of agricultural greenhouses and a plurality of photovoltaic modules which are alternately arranged in sequence;

[0006] Wherein, each of the photovoltaic modules is arranged by a supporting bracket, and a light-transmitting distance is left between two adjacent photovoltaic modules;

[0007] A diffuser plate is provided on the ceiling of each agricultural greenhouse, which is used to diffuse and homogenize the light incident on the ceiling of the agricultural greenhouse from the gap between two adjacent photovoltaic modules and then incident on the agricultural greenhouse.

[0008] In an optional embodiment of the present application, the diffuser plate is also covered with a sunshade black net.

[0009] In an optional embodiment of the present application, a plurality of louver blades with adjustable inclination angles are sequentially arranged on the diffuser plate; and a reflective film is arranged on each of the louver blades.

[0010] In an optional embodiment of the present application, a light intensity sensor is provided in the agricultural greenhouse.

[0011] In an optional embodiment of the present application, there are multiple diffuser panels, and the diffuser panels are spliced ​​and connected in sequence to form a surface structure that matches the top area of ​​the agricultural greenhouse.

[0012] In an optional embodiment of the present application, the coverage rate of the diffuser plate on the plastic film surface of the agricultural greenhouse is not less than 50%.

[0013] In an optional embodiment of the present application, the diffuser plate is fixedly connected to the support beam of the agricultural greenhouse; and a waterproof pad is provided at the portion where the diffuser plate and the support beam are connected to each other.

[0014] In an optional embodiment of the present application, the plastic film of the agricultural greenhouse is a non-transparent film with uniform light properties.

[0015] In an optional embodiment of the present application, the coverage rate of the photovoltaic components to the total land area of ​​the agricultural greenhouse and the photovoltaic components is 42.5% to 55%.

[0016] In an optional embodiment of the present application, the inclination angle of each of the photovoltaic components can be adjusted by the supporting bracket.

[0017] The utility model provides a photovoltaic agricultural greenhouse, comprising a plurality of agricultural greenhouses and a plurality of photovoltaic modules which are alternately arranged in sequence; wherein each photovoltaic module is arranged by a supporting bracket, and a light-transmitting spacing is left between two adjacent photovoltaic modules; a diffuser plate is arranged on the ceiling of each agricultural greenhouse, which is used to diffuse and evenly illuminate the light incident on the ceiling of the agricultural greenhouse from the gap between two adjacent photovoltaic modules, and then the light is incident into the agricultural greenhouse.

[0018] In the present application, on the basis of arranging photovoltaic modules and agricultural greenhouses in alternating intervals, a diffuser panel is further arranged at the ceiling position of each agricultural greenhouse; therefore, when the sunlight shines on the agricultural greenhouse from the gap between two adjacent photovoltaic modules, it is not directly transmitted to the crops in the agricultural greenhouse, but is diffused by the diffuser panel to provide the crops in the agricultural greenhouse with light of uniform intensity. In this way, the light shining from between the photovoltaic modules can be fully utilized to provide the crops in the agricultural greenhouse with the sunlight required for growth, while avoiding the problem of excessive local light intensity in the agricultural greenhouse. In this way, the photovoltaic modules and the agricultural greenhouse can work together to provide a good growth environment for shade-loving crops, thereby maximizing the economic benefits of photovoltaic power generation and crop growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] FIG1 is a schematic diagram of the structure of a photovoltaic agricultural greenhouse provided in an embodiment of the present application;

[0021] FIG2 is a schematic top view of a photovoltaic agricultural greenhouse provided in an embodiment of the present application;

[0022] FIG3 is a schematic longitudinal cross-sectional view of a photovoltaic agricultural greenhouse provided in an embodiment of the present application;

[0023] FIG4 is a schematic cross-sectional view of an agricultural greenhouse provided in an embodiment of the present application;

[0024] In the attached figure: 1 is a photovoltaic component, 2 is an agricultural greenhouse, 3 is a diffuser, 4 is a supporting bracket, 5 is a supporting beam, and 6 is a waterproof pad. DETAILED DESCRIPTION

[0025] Although photovoltaic modules need to absorb sunlight to generate electricity, they do not occupy much land resources under the photovoltaic modules; therefore, planting crops under photovoltaic modules can improve the utilization rate of land resources to a certain extent. However, both crops and photovoltaic modules need light, and photovoltaic modules will inevitably block the light of crops. Therefore, this application further considers alternating photovoltaic modules and agricultural greenhouses for planting shade-loving crops, so that shade-loving crops can use the small amount of sunlight emitted from the gaps between photovoltaic modules while avoiding the problem of too strong sunlight.

[0026] However, the light intensity distribution through the gaps between photovoltaic modules into the agricultural greenhouse is not uniform, which may lead to the problem that some shade-loving crops have insufficient light intensity while some shade-loving crops are exposed to the sun.

[0027] Therefore, in this application, on the basis of alternating the layout of photovoltaic modules and agricultural greenhouses, a diffuser plate is further arranged in the ceiling area of ​​the agricultural greenhouse; thereby, the light that is incident on the agricultural greenhouse through the gaps between the photovoltaic modules can be scattered by the diffuser plate and irradiate the crops in the agricultural greenhouse more evenly; it can be seen that the photovoltaic agricultural greenhouse in this application can ensure the uniformity of light intensity on the basis of providing crops with light of appropriate intensity, which is conducive to improving the economic benefits of the coordinated use of photovoltaics and agricultural greenhouses.

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] As shown in Figures 1 to 4, Figure 1 is a schematic diagram of the structure of the photovoltaic agricultural greenhouse provided in the embodiment of the present application; Figure 2 is a schematic diagram of the top view of the photovoltaic agricultural greenhouse provided in the embodiment of the present application; Figure 3 is a schematic diagram of the longitudinal cross-section of the photovoltaic agricultural greenhouse provided in the embodiment of the present application; Figure 4 is a schematic diagram of the transverse cross-section of the agricultural greenhouse provided in the embodiment of the present application. The longitudinal direction referred to in this application refers to the direction extending along the length of the agricultural greenhouse.

[0030] In a specific embodiment of the present application, the photovoltaic agricultural greenhouse may include:

[0031] A plurality of agricultural greenhouses 2 and a plurality of photovoltaic modules 1 are arranged alternately in sequence;

[0032] Each photovoltaic module 1 is arranged by a support bracket 4, and a light-transmitting distance is left between two adjacent photovoltaic modules 1;

[0033] A diffuser plate 3 is provided on the ceiling of each agricultural greenhouse 2 for diffuse and homogenizing the light incident on the ceiling of the agricultural greenhouse 2 from the gap between two adjacent photovoltaic modules 1 and then incident on the agricultural greenhouse 2 .

[0034] It can be understood that, generally when laying agricultural greenhouses 2, multiple rows of parallel strip greenhouses are laid. Therefore, a support bracket 4 can be set in the gap between two adjacent rows of agricultural greenhouses 2, and a row of photovoltaic modules 1 can be laid on the support bracket 4; thus, the overall laying structure of one row of photovoltaic modules 1 and one row of agricultural greenhouses 2 is presented.

[0035] In addition, the agricultural greenhouse 2 in the present application can be a greenhouse for planting shade-loving crops; therefore, the light irradiated from two adjacent rows of photovoltaic modules 1 to the agricultural greenhouse 2 does not need to be a lot, but it cannot be completely absent. In practical applications, the width of each row of photovoltaic modules 1 can be appropriately set according to the light required by the crops planted in the agricultural greenhouse 2, so that the photovoltaic modules 1 can block the light of the agricultural greenhouse 2 below to a certain extent, but not completely, to ensure that there is enough sunlight between the two adjacent photovoltaic modules 1 to irradiate the agricultural greenhouse 2, and to ensure that the light intensity irradiated on the agricultural greenhouse 2 is not too strong, to meet the needs of the crops in the agricultural greenhouse 2 for light, and to achieve the high efficiency of crops and photovoltaic modules 1 to utilize sunlight to the greatest extent. In practical applications, the coverage rate of the total land area occupied by the photovoltaic modules 1 in the agricultural greenhouse 2 and the photovoltaic modules 1 can be 42% to 55%; specifically, the coverage rate can be 42%, 45%, 48%, 50%, 53%, and 55%.

[0036] On this basis, the light incident on the agricultural greenhouse 2 from the gap between two connected rows of photovoltaic modules 1 often only illuminates a small area on the roof of the agricultural greenhouse 2; obviously, if the sunlight directly enters the small area on the top of the agricultural greenhouse 2 and illuminates the crops in the agricultural greenhouse 2, it will inevitably lead to uneven distribution of light intensity received by the crops at different positions in the crop greenhouse, affecting the normal growth of the crops.

[0037] For this reason, in this embodiment, a diffuser plate 3 is further laid on the ceiling of the agricultural greenhouse 2. Referring to Figures 1 and 2, it can be seen that each row of photovoltaic modules 1 is arranged in the area between two adjacent rows of agricultural greenhouses 2. Therefore, the blocking of sunlight by the photovoltaic modules 1 often also blocks the light in the edge areas on both sides of the agricultural greenhouse 2. Then, the light incident on the agricultural greenhouse 2 from the spacing between the photovoltaic modules 1 is also mostly incident on the ceiling area of ​​the agricultural greenhouse 2. For this reason, in this embodiment, the diffuser plate 3 is laid on the ceiling of the agricultural greenhouse 2, so that it can be ensured to a large extent that the light incident on the agricultural greenhouse 2 can be fully diffused and evenly illuminated, and finally evenly irradiated to the crops in the agricultural greenhouse 2.

[0038] In addition, as shown in FIG. 1 , in the embodiment shown in FIG. 1 , the agricultural greenhouse 2 is a greenhouse structure with a curved surface structure. Therefore, in order to ensure that the diffuser plate 3 can better fit on the curved surface at the top of the agricultural greenhouse 2, the diffuser plate 3 can include a plurality of diffuser plates 3 that are sequentially spliced ​​with each other, so that the diffuser plates 3 are spliced ​​with each other to form a facing structure that matches the top area of ​​the agricultural greenhouse 2. In practical applications, the diffuser plates 3 can be connected in a flexible splicing manner, for example, they can be connected by connecting rings or chains, so that the diffuser plates 3 spliced ​​with each other can be well adapted to form a surface shape that is consistent with the surface shape of the top area of ​​the agricultural greenhouse 2.

[0039] In addition, the coverage rate of the diffuser plate 3 on the plastic film surface of the agricultural greenhouse 2 should be no less than 50%.

[0040] On this basis, in order to prevent the diffuser plate 3 from sliding off the top of the agricultural greenhouse 2, the diffuser plate 3 can be further fixedly connected to the support beam 5 of the agricultural greenhouse 2. It can be understood that a support beam for supporting the plastic film should be provided in the agricultural greenhouse 2, and for this purpose, the diffuser plate 3 can be further fixed with the aid of the support beam. The middle position at the top of the agricultural greenhouse 2 is generally supported by the support beam 5, and for this purpose, the diffuser plate 3 at the top of the agricultural greenhouse 2 facing the support beam 5 can be fixedly connected to the support beam 5 by bolts. In addition, a waterproof pad 6 is further provided at the position where the diffuser plate 3 and the support beam 5 are connected to each other, so as to avoid the problem of water leakage in the agricultural greenhouse 2.

[0041] In addition, in actual applications, although the sunlight can only irradiate the agricultural greenhouse 2 from the distance between the two photovoltaic modules 1, if the light intensity of the sunlight is too high, even if the light passes through the diffuser 3, there is still a possibility of death by exposure to the sun for shade-loving crops. For this reason, in an optional embodiment of the present application, a layer of sunshade black net can be further laid on the heat sink, and the sunshade black net can reduce the sunlight incident on the heat sink to a certain extent, thereby reducing the light intensity incident on the agricultural greenhouse 2 to a certain extent.

[0042] In addition, in actual applications, based on the different types of shade-loving crops, the demand for light intensity is also different. The black sunshade net can be set with only one layer or two layers, and this application does not make specific restrictions on this.

[0043] Taking into account that in actual applications, as the weather changes, the light intensity of the sunlight passing through the gap between the two photovoltaic modules 1 and irradiating the agricultural greenhouse 2 is not constant, in order to be able to reasonably adjust the light intensity incident on the agricultural greenhouse 2 as the weather changes, in another optional embodiment of the present application, a plurality of louver blades with adjustable inclination angles can be arranged in sequence on the heat sink; each louver blade is provided with a reflective film.

[0044] Similar to the working principle of Venetian blinds, when the sunlight in the environment is not strong, the angle between each louver blade and the scattering plate can be adjusted to the maximum, so that each louver blade is almost perpendicular to each scattering plate. At this time, the gap between two adjacent louver blades is also the largest, and the sunlight incident from the gap between adjacent photovoltaic modules 1 can be incident on the scattering plate 3 to the greatest extent, thereby ensuring that crops can obtain sufficient light. When the sunlight in the environment is relatively strong, the angle between each louver blade and the scattering plate 3 can be reduced, that is, the gap between two adjacent louver blades can be reduced, thereby reducing the light energy incident on the scattering plate 3 and avoiding excessive light. In addition, a reflective film is provided on the louver blades, which can reflect part of the light incident on the louver blades to the photovoltaic module 1 to a certain extent, further improving the utilization rate of the photovoltaic module 1 for sunlight.

[0045] It can be seen that in this embodiment, the light incident into the agricultural greenhouse 2 can be flexibly adjusted based on the actual sunlight intensity, thereby providing a suitable lighting environment for crops to the greatest extent.

[0046] In order to more accurately adjust the light intensity incident into the agricultural greenhouse 2, in another optional embodiment of the present application, a light intensity sensor may be provided in the agricultural greenhouse 2, and the angle of the louver blades may be adjusted by detecting the light intensity of the agricultural greenhouse 2 through the light intensity sensor.

[0047] In addition, it can be understood that in actual applications, in addition to setting a sunshade black net or louver blades on the diffuser plate 3 to adjust the light intensity incident into the agricultural greenhouse 2; the intensity of light incident into the agricultural greenhouse 2 can also be further changed by adjusting the inclination angle of the photovoltaic component 1.

[0048] Specifically, in an optional embodiment of the present application, the inclination angle of each photovoltaic module 1 can be adjusted by a supporting bracket 4 supporting each photovoltaic module 1, thereby changing the energy of light incident on the agricultural greenhouse 2 from the distance between two adjacent rows of photovoltaic modules 1, and also ensuring that the light intensity in the agricultural greenhouse 2 is more suitable.

[0049] As described above, the agricultural greenhouse 2 is a structure formed by supporting a bright supporting plastic film. For the plastic film of the agricultural greenhouse 2, the present application also gives priority to using a non-transparent and uniform light film, for example, a film close to milky white can be used. Therefore, even if some light is irradiated to the area on the plastic film where the diffuser plate 3 is not laid, the plastic film can also scatter the incident light to a certain extent and then enter the agricultural greenhouse 2.

[0050] Based on the above discussion, in this application, on the basis of arranging photovoltaic modules and agricultural greenhouses in alternating intervals, a diffuser panel is further arranged at the ceiling position of each agricultural greenhouse; thus, when the sunlight shines on the agricultural greenhouse from the gap between two adjacent photovoltaic modules, it is not directly transmitted to the crops in the agricultural greenhouse, but is diffused by the diffuser panel to provide the crops in the agricultural greenhouse with light of uniform intensity. In this way, the light irradiated between the photovoltaic modules can be fully utilized to provide the crops in the agricultural greenhouse with the sunlight required for growth, while avoiding the problem of excessive local light intensity in the agricultural greenhouse. In this way, the photovoltaic modules and the agricultural greenhouse can work together to provide a good growth environment for shade-loving crops, thereby maximizing the economic benefits of photovoltaic power generation and crop growth.

[0051] In a specific embodiment of the present application, the crop planted in the agricultural greenhouse is Dendrobium officinale, the width of the agricultural greenhouse is 6m, the distance between two adjacent rows of agricultural greenhouses is 0.75m, the size of the photovoltaic module is 1908mm*1134mm*30mm, the inclination angle is 13 degrees, the pipe piles (i.e., support brackets) of the photovoltaic module are arranged in the middle of the greenhouse, and a gap of about 3000mm is reserved between the front and rear rows of photovoltaic modules. Since the width of the greenhouse is 6m, the coverage rate of the crop by photovoltaic is 50%; the transmittance of the scattering film is 80%. Because the light compensation point of Dendrobium officinale is about 1700lx, and the light saturation point is about 10000lx. The light analysis of the four seasons of spring, summer, autumn and winter is as follows:

[0052] 1. Summer light analysis: The coverage rate of photovoltaic modules is 50%. From 7:30 am to 4:30 pm in summer, the light intensity received by the diffuser is about 20,000 lx to 100,000 lx. The external sunshade black net covers the surface of the diffuser with two layers and is fixed by bolts. Each layer has a 50% shading rate. At 12 noon, the light intensity received by the diffuser is about 25,000 lx, and the illuminance diffused to the surface of the dendrobium is about 10,000 lx; ​​at 7:30 am and 4:30 pm, the illuminance of the diffuser is about 5,000 lx, and the illuminance diffused to the dendrobium is about 2,000 lx; ​​it can be seen that in summer, the illuminance on the surface of the dendrobium is above the light compensation point and close to the light saturation point. The dendrobium can grow normally for more than 9 hours in summer.

[0053] 2. Spring and Autumn Light Analysis: The photovoltaic coverage rate is 50%. From 8 am to 4 pm in spring and autumn, the light intensity of the diffuser is about 10,000 lx to 60,000 lx. The external sunshade black net covers a layer on the surface of the diffuser, and each layer has a 50% shading rate. At 12 noon, the illuminance of the diffuser is about 30,000 lx, and the illuminance diffused to the surface of the dendrobium is about 12,000 lx; ​​at 8 am and 4 pm, the illuminance of the diffuser is about 5,000 lx, and the illuminance diffused to the dendrobium is about 2,000 lx. It can be seen that in the Spring and Autumn period, the surface illuminance of the dendrobium after the installation of photovoltaic modules is above the light compensation point and close to the light saturation point. The dendrobium can grow normally for more than 8 hours in the Spring and Autumn period.

[0054] 3. Winter light analysis: The photovoltaic coverage rate is 50%. From 8:30 a.m. to 3:30 p.m. in winter, the diffuser receives about 5,000 to 30,000 lx, and there is no need to set up a black sunshade net. At 12 noon, the diffuser has an illumination of about 30,000 lx, and the diffused illumination on the surface of the dendrobium is about 12,000 lx; ​​at 8:30 a.m. and 4:30 p.m., the diffuser has an illumination of about 5,000 lx, and the diffused illumination on the dendrobium is about 2,000 lx; ​​therefore, in winter, the surface illumination of the dendrobium after photovoltaic installation is above the light compensation point and close to the light saturation point; the dendrobium can grow normally for more than 7 hours in winter.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprising one..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as to avoid too much redundancy.

[0056] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A photovoltaic agricultural greenhouse, characterized in that: It includes a plurality of agricultural greenhouses and a plurality of photovoltaic modules which are arranged alternately in sequence; Wherein, each of the photovoltaic modules is arranged by a supporting bracket, and a light-transmitting distance is left between two adjacent photovoltaic modules; A diffuser plate is provided on the ceiling of each agricultural greenhouse, which is used to diffuse and homogenize the light incident on the ceiling of the agricultural greenhouse from the gap between two adjacent photovoltaic modules and then incident on the agricultural greenhouse.

2. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: The light-diffusing plate is also covered with a sunshade black net.

3. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: A plurality of louver blades with adjustable inclination angles are sequentially arranged on the light diffusion plate; and a reflective film is arranged on each of the louver blades.

4. The photovoltaic agricultural greenhouse according to claim 3, characterized in that: A light intensity sensor is arranged in the agricultural greenhouse.

5. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: There are multiple light diffuser plates, and the light diffuser plates are spliced ​​and connected in sequence to form a surface structure that matches the top area of ​​the agricultural greenhouse.

6. The photovoltaic agricultural greenhouse according to claim 5, characterized in that: The coverage rate of the diffuser plate on the plastic film surface of the agricultural greenhouse is not less than 50%.

7. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: The diffuser plate is fixedly connected to the support beam of the agricultural greenhouse; and a waterproof pad is provided at the position where the diffuser plate and the support beam are connected to each other.

8. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: The plastic film of the agricultural greenhouse is a non-transparent film with uniform light properties.

9. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: The coverage rate of the photovoltaic modules on the total land area of ​​the agricultural greenhouse and the photovoltaic modules is 42.5% to 55%.

10. The photovoltaic agricultural greenhouse according to claim 1, characterized in that: The inclination angle of each photovoltaic module can be adjusted by the supporting bracket.

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