Solar organic farm and energy utilization method

Abstract

The invention relates to the technical field of circulating farms, and discloses a solar organic farm which comprises a steel structure greenhouse and a buried water storage tank, and the top of the steel structure greenhouse is provided with a solar photovoltaic mechanism and a rainwater recycling mechanism. The solar photovoltaic mechanism comprises an aluminum alloy fixing frame, photovoltaic panels, an equipment box, an off-grid inverter and a storage battery, the aluminum alloy fixing frame is fixedly mounted at the top of the steel structure greenhouse, and a plurality of photovoltaic panels are fixedly mounted in the aluminum alloy fixing frame. According to the solar organic farm and the energy utilization method, a solar photovoltaic mechanism is installed at the top of a steel structure greenhouse and comprises a photovoltaic panel, an off-grid inverter and a storage battery, energy self-sufficiency of the farm is achieved, solar energy is converted into electric energy through the photovoltaic panel, the electric energy is converted into available electric power through the off-grid inverter, and the available electric power is stored in the storage battery. The farm not only reduces dependence on external power supply, but also reduces greenhouse gas emission.

Description

Technical Field

[0001] The present invention relates to the technical field of recycling farms, in particular to a solar organic farm and an energy utilization method. Background Art

[0002] Organic farms represent an agricultural production model that coexists harmoniously with nature. They follow a series of strict ecological principles and standards and are committed to achieving sustainable agricultural production and environmental protection. In such farms, ecological balance and biodiversity are valued, and the management of pests and diseases relies on natural methods rather than chemical pesticides, thereby reducing the negative impact on the environment.

[0003] However, faced with the challenges brought by traditional agriculture and energy production methods, especially the high dependence on water resources and electricity, we have to seek more innovative and sustainable solutions. Traditional agriculture, especially in arid and semi-arid areas, often has a large demand for water resources, which often leads to a sharp drop in groundwater levels, which may trigger a water shortage crisis. This dependence on water not only threatens the ecological balance, but also poses a challenge to the long-term sustainable development of human society. At the same time, the operation of modern agricultural machinery and irrigation systems is highly dependent on electricity, which not only pushes up the economic cost of agricultural production, but also the greenhouse gas emissions that may be generated in the process of electricity production, further aggravating the severe situation of global climate change. Therefore, we propose a solar organic farm and energy utilization method. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a solar organic farm and an energy utilization method, which have the advantage of being able to realize the recycling of energy and resources, and solve the problem that traditional agriculture, especially in arid and semi-arid areas, often has a large demand for water resources, which often leads to a sharp drop in groundwater levels, and may trigger a water shortage crisis. This dependence on water not only threatens the ecological balance, but also poses a challenge to the long-term sustainable development of human society. At the same time, the operation of modern agricultural machinery and irrigation systems is extremely dependent on electricity, which not only pushes up the economic cost of agricultural production, but also the greenhouse gas emissions that may be generated in the process of electricity production, further aggravating the severe situation of global climate change.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of recycling energy and resources, the present invention provides the following technical solutions: a solar organic farm, comprising a steel structure greenhouse and an underground water storage tank, wherein a solar photovoltaic mechanism and a rainwater recycling mechanism are arranged on the top of the steel structure greenhouse;

[0008] The solar photovoltaic mechanism includes an aluminum alloy fixing frame, a photovoltaic panel, an equipment box, an off-grid inverter and a battery. The top of the steel structure greenhouse is fixedly installed with an aluminum alloy fixing frame, a number of photovoltaic panels are fixedly installed inside the aluminum alloy fixing frame, the bottom of the aluminum alloy fixing frame is fixedly installed with an equipment box, the inside of the equipment box is fixedly installed with an off-grid inverter, and the inside of the equipment box is fixedly installed with a battery;

[0009] The rainwater recycling mechanism includes a rainwater collection trough box, an electric three-way valve, a delivery pump, a fixed splint, a fixed cross bar, a diversion pipe, a water nozzle, a connecting water pipe, a manual three-way valve, a rainwater filter tank, a coarse filter layer, a fine filter layer, a biological filter layer, an active filter layer and a collection pipe. The bottom of the aluminum alloy fixed frame is fixedly installed with a rainwater collection trough box, the bottom of the rainwater collection trough box is connected with an electric three-way valve, the interior of the equipment box is fixedly installed with a delivery pump, and the inner top wall of the steel structure greenhouse is provided with four fixed splints, and every two of the fixed splints are fixed with a splint. Fixed cross bars are fixedly installed between the fixed splints, a number of shunt pipes are fixedly installed on the bottom of the fixed cross bars, a number of water nozzles are fixedly installed on the bottom of each of the shunt pipes, and the shunt pipes are connected by connecting water pipes, a manual three-way valve is connected to the bottom of the electric three-way valve, and a rainwater filter tank body is connected to the bottom of the manual three-way valve, and a coarse filter layer, a fine filter layer, a biological filter layer and an active filter layer are arranged inside the rainwater filter tank body, and a collecting pipe is fixedly installed on the bottom of the rainwater filter tank body.

[0010] Preferably, the steel structure greenhouse comprises a number of columns, beams and high-strength tempered glass, the columns are interconnected by beams, and a number of high-strength tempered glass are fixedly installed on the outside of the columns and beams.

[0011] Preferably, the photovoltaic panel, off-grid inverter and battery are electrically connected via wires, the aluminum alloy fixing frame is a rectangular box structure with an open top, and the top of the rainwater collection trough box passes through the bottom of the aluminum alloy fixing frame and extends into the interior thereof.

[0012] Preferably, the rainwater collection trough box, the electric three-way valve and the manual three-way valve are connected by a water supply connecting pipe, a first delivery pipe extending to the inside of the rainwater filter tank is fixedly installed at the bottom of the manual three-way valve, and a second delivery pipe extending to the inside of the buried water storage tank is fixedly installed on the left side of the manual three-way valve.

[0013] Preferably, threaded rods are movably installed on the front and rear sides of each of the fixed splints, each of the fixed splints is connected to the bottom of the beam through the threaded rods, and a first irrigation pipe connected to a delivery pump is fixedly installed on the right side of the electric three-way valve.

[0014] Preferably, a second irrigation pipe is fixedly installed at the bottom of the delivery pump, the bottom of the second irrigation pipe is connected to the connecting water pipe, and the bottom of the collecting pipe passes through the top of the buried water storage tank and extends to the inside of the buried water storage tank.

[0015] Preferably, the coarse filter layer is located on the top of the fine filter layer, the fine filter layer is located on the top of the biological filter layer, and the biological filter layer is located on the top of the active filter layer.

[0016] A method for utilizing energy in a solar organic farm, comprising a solar organic farm, and further comprising the following steps:

[0017] S1. Installation of solar photovoltaic power generation system: install an aluminum alloy fixing frame on the top of the steel structure greenhouse, install photovoltaic panels in the aluminum alloy fixing frame, and connect the photovoltaic panels to the off-grid inverter and battery in the equipment box through wires;

[0018] S2. Rainwater collection and preliminary distribution: Rainwater falls inside the aluminum alloy fixed frame and is collected by the rainwater collection tank box. Then the rainwater is distributed through the electric three-way valve and is ready to enter the filtration purification or be directly used for irrigation;

[0019] S3. Rainwater filtration and purification: Rainwater is distributed by an electric three-way valve and transported to the rainwater filtration tank. It is filtered and purified in the rainwater filtration tank by passing through a coarse filter layer, a fine filter layer, a biological filter layer and an active filter layer in sequence. The filtered rainwater is transported through a collection pipe and stored in an underground water storage tank. The water in the underground water storage tank can be circulated for irrigation or other purposes as needed.

[0020] S4. Rainwater irrigation: Rainwater is distributed through the electric three-way valve, and then through the delivery pump and the connecting water pipe to the diversion pipe on the top wall of the steel structure greenhouse. The diversion pipe is connected to the water nozzle to achieve uniform irrigation of farm crops.

[0021] S5. Energy storage and use: The delivery pump can also extract water from the underground water storage tank through the second delivery pipe, and then use the diversion pipe and water nozzle to achieve uniform irrigation of farm crops. The excess electricity generated by photovoltaic power generation is stored in batteries to provide the farm with the required electricity.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a solar organic farm and energy utilization method, which has the following beneficial effects:

[0024] 1. The solar organic farm and energy utilization method collect rainwater through a rainwater recycling mechanism and a rainwater collection trough box. The rainwater is then purified through a multi-stage filtration layer in a rainwater filter tank and finally stored in an underground water storage tank. After the rainwater is purified, it is redistributed to the diversion pipes and water nozzles in the steel structure greenhouse through a delivery pump to achieve uniform irrigation of crops, reduce dependence on groundwater resources, not only save water resources, but also reduce the need for chemical treatment through natural filtration, and protect the ecological balance.

[0025] 2. The solar organic farm and energy utilization method realize energy self-sufficiency of the farm by installing a solar photovoltaic mechanism, including photovoltaic panels, off-grid inverters and batteries, on the top of the steel structure greenhouse. The photovoltaic panels convert solar energy into electrical energy, which is converted into usable electricity through the off-grid inverter and stored in the battery. In this way, the farm not only reduces its dependence on external power supply, but also reduces greenhouse gas emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the steel structure greenhouse structure of the present invention;

[0028] Figure 3 For the present invention Figure 1 A is an enlarged schematic diagram;

[0029] Figure 4 For the present invention Figure 1 The enlarged schematic diagram of point B in FIG.

[0030] Figure 5 For the present invention Figure 1 The enlarged schematic diagram of point C in FIG.

[0031] Figure 6 It is a three-dimensional schematic diagram of the fixing splint, fixing cross bar and shunt pipe of the present invention.

[0032] In the figure: 1. Steel structure greenhouse; 101. Column; 102. Beam; 103. High-strength tempered glass; 2. Underground water storage tank; 3. Solar photovoltaic mechanism; 301. Aluminum alloy fixing frame; 302. Photovoltaic panel; 303. Equipment box; 304. Off-grid inverter; 305. Battery; 4. Rainwater recycling mechanism; 401. Rainwater collection tank box; 402. Electric three-way valve; 403. Delivery pump; 404. Fixed splint; 405. Fixed cross bar; 406. Diversion pipe; 407. Water nozzle; 408. Connecting water pipe; 409. Manual three-way valve; 410. Rainwater filtration tank; 411. Coarse filter layer; 412. Fine filter layer; 413. Biological filter layer; 414. Active filter layer; 415. Collection pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-6 A solar organic farm comprises a steel structure greenhouse 1 and an underground water storage tank 2. A solar photovoltaic mechanism 3 and a rainwater recycling mechanism 4 are arranged on the top of the steel structure greenhouse 1;

[0035] The solar photovoltaic mechanism 3 includes an aluminum alloy fixing frame 301, a photovoltaic panel 302, an equipment box 303, an off-grid inverter 304 and a battery 305. The aluminum alloy fixing frame 301 is fixedly installed on the top of the steel structure greenhouse 1, and a number of photovoltaic panels 302 are fixedly installed inside the aluminum alloy fixing frame 301. The equipment box 303 is fixedly installed on the bottom of the aluminum alloy fixing frame 301, and the off-grid inverter 304 is fixedly installed inside the equipment box 303. The battery 305 is fixedly installed inside the equipment box 303;

[0036] The rainwater recycling mechanism 4 includes a rainwater collection tank box 401, an electric three-way valve 402, a delivery pump 403, a fixed splint 404, a fixed cross bar 405, a diversion pipe 406, a water nozzle 407, a connecting water pipe 408, a manual three-way valve 409, a rainwater filtration tank 410, a coarse filter layer 411, a fine filter layer 412, a biological filter layer 413, an active filter layer 414 and a collection pipe 415. The bottom of the aluminum alloy fixed frame 301 is fixedly installed with a rainwater collection tank box 401, the bottom of the rainwater collection tank box 401 is connected to an electric three-way valve 402, the interior of the equipment box 303 is fixedly installed with a delivery pump 403, and the inner top wall of the steel structure greenhouse 1 is provided with four fixed splints 404. 4. A fixed cross bar 405 is fixedly installed between every two fixed splints 404, a number of shunt pipes 406 are fixedly installed at the bottom of the fixed cross bar 405, a number of water nozzles 407 are fixedly installed at the bottom of each shunt pipe 406, and the shunt pipes 406 are connected through a connecting water pipe 408. A manual three-way valve 409 is connected to the bottom of the electric three-way valve 402, and a rainwater filter tank body 410 is connected to the bottom of the manual three-way valve 409. A coarse filter layer 411, a fine filter layer 412, a biological filter layer 413 and an active filter layer 414 are arranged inside the rainwater filter tank body 410, and a collecting pipe 415 is fixedly installed at the bottom of the rainwater filter tank body 410.

[0037] Furthermore, the steel structure greenhouse 1 includes a number of columns 101 , beams 102 and high-strength tempered glass 103 , the columns 101 are interconnected by the beams 102 , and a number of high-strength tempered glass 103 are fixedly installed on the outside of the columns 101 and the beams 102 .

[0038] Specifically, the steel structure greenhouse 1 uses transparent high-strength tempered glass 103, which is more durable and impact-resistant than ordinary glass. This enables the greenhouse to withstand severe weather conditions, reduce maintenance costs and replacement frequency, and even when broken, it will form small particles, reducing the risk of harm to people and crops.

[0039] Furthermore, the photovoltaic panel 302, the off-grid inverter 304 and the battery 305 are electrically connected through wires, the aluminum alloy fixing frame 301 is a rectangular box structure with an open top, and the top of the rainwater collection trough box 401 passes through the bottom of the aluminum alloy fixing frame 301 and extends into the interior thereof.

[0040] Specifically, the photovoltaic panel 302 utilizes sunlight to convert solar energy into direct current through the photoelectric effect. Subsequently, the off-grid inverter 304 converts the direct current into alternating current required by the internal equipment of the greenhouse. The excess electric energy is transmitted to the battery 305 for storage for use at night or when there is insufficient light. This system not only reduces dependence on external power supply, but also reduces greenhouse gas emissions through the use of solar energy, realizes the sustainable use of clean energy, and provides an environmentally friendly and economical energy solution for organic farms.

[0041] Furthermore, the rainwater collection trough box 401, the electric three-way valve 402 and the manual three-way valve 409 are connected by a water supply connecting pipe. The bottom of the manual three-way valve 409 is fixedly installed with a first delivery pipe extending to the inside of the rainwater filter tank 410, and the left side of the manual three-way valve 409 is fixedly installed with a second delivery pipe extending to the inside of the buried water storage tank 2.

[0042] Specifically, the electric three-way valve 402 is used to distribute the rainwater collected by the rainwater collection trough box 401. The collected rainwater can be stored in the underground water storage tank 2 after purification and filtration, or it can be directly irrigated through the delivery action of the delivery pump 403. By rotating the manual three-way valve 409, on the one hand, the rainwater collected by the rainwater collection trough box 401 can enter the interior of the rainwater filter tank body 410, and on the other hand, the delivery pump 403 can extract the water stored in the underground water storage tank 2 through the second delivery pipe for use.

[0043] Furthermore, threaded rods are movably installed on the front and rear sides of each fixed clamp 404, and each fixed clamp 404 is connected to the bottom of the beam 102 through the threaded rod. The right side of the electric three-way valve 402 is fixedly installed with a first irrigation pipe connected to the delivery pump 403.

[0044] Specifically, by rotating and removing the threaded rod, the fixed clamping plate 404, the fixed cross bar 405, the diversion pipe 406, the water nozzle 407 and the connecting water pipe 408 located at the bottom of the beam 102 can be disassembled, which is convenient for regular maintenance to ensure the irrigation effect.

[0045] Furthermore, a second irrigation pipe is fixedly installed at the bottom of the delivery pump 403 , and the bottom of the second irrigation pipe is connected to the connecting water pipe 408 . The bottom of the collecting pipe 415 passes through the top of the underground water storage tank 2 and extends to the interior of the underground water storage tank 2 .

[0046] Specifically, the underground water storage tank 2 is located underground and can efficiently collect rainwater in the rainy season. In the dry season, the water in the underground water storage tank 2 can be transported and pumped for crop irrigation or further processed for livestock drinking, thereby realizing the recycling and conservation of water resources. The underground design not only saves precious ground space, but also reduces water evaporation loss due to its natural thermal insulation properties. In addition, in an emergency, it can also serve as a reliable backup water source to ensure the stable operation of the farm under adverse climatic conditions.

[0047] Furthermore, the coarse filter layer 411 is located on the top of the fine filter layer 412 , the fine filter layer 412 is located on the top of the biological filter layer 413 , and the biological filter layer 413 is located on the top of the active filter layer 414 .

[0048] Specifically, the coarse filter layer 411 is composed of sand or gravel, which can remove larger suspended matter in rainwater, such as leaves, branches, etc.; the fine filter layer 412 is composed of sand or quartz sand, which can further remove fine suspended particles; the biological filter layer 413 is composed of bioceramics, which can remove organic matter and certain chemicals through adsorption and biodegradation; the active filter layer 414 is composed of silver-impregnated activated carbon, which can remove pathogens and improve water quality.

[0049] In summary, the solar organic farm and energy utilization method collect rainwater through the rainwater recycling mechanism 4 and the rainwater collection trough box 401. The rainwater is then purified through the multi-stage filtration layer in the rainwater filter tank 410 and finally stored in the buried water storage tank 2. After the rainwater is purified, it is redistributed to the diversion pipe 406 and the water nozzle 407 in the steel structure greenhouse 1 through the delivery pump 403, so as to achieve uniform irrigation of crops and reduce dependence on groundwater resources. It not only saves water resources, but also reduces the need for chemical treatment through natural filtration, thereby protecting the ecological balance.

[0050] Moreover, the solar organic farm and the energy utilization method realize energy self-sufficiency of the farm by installing a solar photovoltaic mechanism 3, including a photovoltaic panel 302, an off-grid inverter 304 and a battery 305, on the top of the steel structure greenhouse 1. The photovoltaic panel 302 converts solar energy into electrical energy, which is converted into usable electricity through the off-grid inverter 304 and stored in the battery 305. In this way, the farm not only reduces its dependence on external power supply, but also reduces greenhouse gas emissions, and solves the problem that traditional agriculture, especially in arid and semi-arid areas, often has a large demand for water resources, which often leads to a sharp drop in groundwater levels, and may trigger a water shortage crisis. This dependence on water not only threatens the ecological balance, but also poses a challenge to the long-term sustainable development of human society. At the same time, the operation of modern agricultural machinery and irrigation systems is extremely dependent on electricity, which not only pushes up the economic cost of agricultural production, but also the greenhouse gas emissions that may be generated in the process of electricity production, further aggravating the severe situation of global climate change.

[0051] 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 any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solar organic farm, comprising a steel structure greenhouse (1) and an underground water storage tank (2), characterized in that: A solar photovoltaic mechanism (3) and a rainwater recycling mechanism (4) are arranged on the top of the steel structure greenhouse (1); The solar photovoltaic mechanism (3) comprises an aluminum alloy fixing frame (301), a photovoltaic panel (302), an equipment box (303), an off-grid inverter (304) and a storage battery (305); the aluminum alloy fixing frame (301) is fixedly installed on the top of the steel structure greenhouse (1); a plurality of photovoltaic panels (302) are fixedly installed inside the aluminum alloy fixing frame (301); the equipment box (303) is fixedly installed on the bottom of the aluminum alloy fixing frame (301); the off-grid inverter (304) is fixedly installed inside the equipment box (303); and the storage battery (305) is fixedly installed inside the equipment box (303); The rainwater recycling mechanism (4) comprises a rainwater collection tank box (401), an electric three-way valve (402), a delivery pump (403), a fixed clamp (404), a fixed cross bar (405), a diversion pipe (406), a water nozzle (407), a connecting water pipe (408), a manual three-way valve (409), a rainwater filtration tank (410), a coarse filter layer (411), a fine filter layer (412), a biological filter layer (413), an active filter layer (414) and a collection pipe (415). The bottom of the aluminum alloy fixed frame (301) is fixedly installed with the rainwater collection tank box (401), the bottom of the rainwater collection tank box (401) is connected with the electric three-way valve (402), the interior of the equipment box (303) is fixedly installed with the delivery pump (403), and the inner top wall of the steel structure greenhouse (1) is provided with four fixed clamps (411). 04), a fixed cross bar (405) is fixedly installed between every two of the fixed clamps (404), a number of shunt pipes (406) are fixedly installed at the bottom of the fixed cross bar (405), a number of water nozzles (407) are fixedly installed at the bottom of each of the shunt pipes (406), and a number of shunt pipes (406) are connected to each other through a connecting water pipe (408), a manual three-way valve (409) is connected to the bottom of the electric three-way valve (402), and a rainwater filter tank (410) is connected to the bottom of the manual three-way valve (409), and a coarse filter layer (411), a fine filter layer (412), a biological filter layer (413) and an active filter layer (414) are arranged inside the rainwater filter tank (410), and a collecting pipe (415) is fixedly installed at the bottom of the rainwater filter tank (410).

2. A solar organic farm according to claim 1, characterized in that: The steel structure greenhouse (1) comprises a plurality of columns (101), a cross beam (102) and high-strength tempered glass (103); the plurality of columns (101) are connected to each other via the cross beam (102), and a plurality of high-strength tempered glass (103) are fixedly installed on the outside of the columns (101) and the cross beam (102).

3. A solar organic farm according to claim 1, characterized in that: The photovoltaic panel (302), the off-grid inverter (304) and the storage battery (305) are electrically connected via wires; the aluminum alloy fixing frame (301) is a rectangular box structure with an open top; the top of the rainwater collection tank box (401) passes through the bottom of the aluminum alloy fixing frame (301) and extends into the interior thereof.

4. A solar organic farm according to claim 1, characterized in that: The rainwater collection tank box (401), the electric three-way valve (402) and the manual three-way valve (409) are connected via a water supply connection pipe; a first delivery pipe extending to the interior of a rainwater filter tank (410) is fixedly installed at the bottom of the manual three-way valve (409); and a second delivery pipe extending to the interior of an underground water storage tank (2) is fixedly installed on the left side of the manual three-way valve (409).

5. A solar organic farm according to claim 2, characterized in that: Threaded rods are movably installed on both the front and rear sides of each fixed clamp (404), and each fixed clamp (404) is connected to the bottom of the beam (102) through the threaded rod. A first irrigation pipe connected to the delivery pump (403) is fixedly installed on the right side of the electric three-way valve (402).

6. A solar organic farm according to claim 1, characterized in that: A second irrigation pipe is fixedly mounted at the bottom of the delivery pump (403), the bottom of the second irrigation pipe is connected to the connecting water pipe (408), and the bottom of the collecting pipe (415) passes through the top of the underground water storage tank (2) and extends to the interior of the underground water storage tank (2).

7. A solar organic farm according to claim 1, characterized in that: The coarse filter layer (411) is located on the top of the fine filter layer (412), the fine filter layer (412) is located on the top of the biological filter layer (413), and the biological filter layer (413) is located on the top of the active filter layer (414).

8. A method for utilizing energy in a solar organic farm, characterized in that: The solar organic farm comprising claims 1 to 7 further comprises the following steps: S1. Installation of a solar photovoltaic power generation system: an aluminum alloy fixing frame (301) is installed on the top of the steel structure greenhouse (1), a photovoltaic panel (302) is installed in the aluminum alloy fixing frame (301), and the photovoltaic panel (302) is electrically connected to an off-grid inverter (304) and a storage battery (305) in an equipment box (303) through a wire; S2, rainwater collection and preliminary distribution: Rainwater falls inside the aluminum alloy fixed frame (301), is collected by the rainwater collection tank box (401), and then distributed through the electric three-way valve (402), ready to enter the filtration purification or directly used for irrigation; S3, rainwater filtration and purification: rainwater is distributed by the electric three-way valve (402) and transported to the rainwater filtration tank (410), and is filtered and purified in the rainwater filtration tank (410) by passing through the coarse filter layer (411), the fine filter layer (412), the biological filter layer (413) and the active filter layer (414). The filtered rainwater is transported through the collection pipe (415) and stored in the underground water storage tank (2). The water in the underground water storage tank (2) can be circulated for irrigation or other purposes as needed; S4, rainwater irrigation: rainwater is distributed through the electric three-way valve (402), and then through the delivery pump (403) and the connecting water pipe (408) to the diversion pipe (406) on the top wall of the steel structure greenhouse (1). The diversion pipe (406) is connected to the water spray nozzle (407) to achieve uniform irrigation of farm crops; S5. Energy storage and use: The delivery pump (403) can also extract water from the underground water storage tank (2) through the second delivery pipe, and then use the diversion pipe (406) and the water nozzle (407) to achieve uniform irrigation of farm crops. The excess electricity generated by photovoltaic power generation is stored in the battery (305) to provide the required electricity for the farm.

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