CN107484580A - Booth type heliogreenhouse and its application with solar energy collection hold over system - Google Patents

Abstract

The invention discloses a greenhouse-type solar greenhouse with a solar energy collection and heat storage system and an application thereof, belonging to the technical field of solar energy utilization in agricultural engineering. Install the solar thermal storage system and three-dimensional cultivation system in the greenhouse type solar greenhouse: The solar thermal storage system uses PE pipes fixed on the greenhouse frame as the thermal storage system, uses water as the heat storage medium in the tube, and passes through the water during the day. Circulating in the PE pipes on the skeleton for heat exchange and absorption of solar energy, and storing them in the thermal insulation reservoir; the three-dimensional cultivation system is used as a cultivation frame for the production of vegetable crops, and as a heat storage system to store the sunlight in the greenhouse during the day thermal energy. The greenhouse is easy to operate and maintain, and it is the development trend of energy-saving solar greenhouses. The greenhouse can effectively reduce heat loss, increase the yield and quality of fruits and vegetables in the greenhouse; the greenhouse has simple structure, low cost, easy operation and good operation effect. It has the characteristics of energy saving and practicality.

Description

Greenhouse type solar greenhouse with solar energy collection and heat storage system and its application

technical field

The invention belongs to the technical field of solar energy utilization in agricultural engineering, in particular to a greenhouse-type solar greenhouse with a solar energy collection and heat storage system and its application.

Background technique

The solar greenhouse is a unique cultivation facility in my country. It can be used for the overwintering production of fruits, vegetables and flowers without heating or a small amount of heating. After decades of development, the solar greenhouse has been widely used because of its good heat storage and heat preservation performance. The problems existing in the use of solar greenhouses have also become increasingly prominent, and the problem of poor temperature and humidity environment regulation is the most serious. Since the solar greenhouse only relies on the back wall for passive heat storage, the heat storage capacity and heat storage are limited. In the case of extremely low temperature in winter, the phenomenon of low indoor temperature and high air humidity at night is very common. Such an indoor environment not only seriously affects the yield and quality of crops, but also causes the occurrence of various diseases and insect pests, which directly leads to the reduction of crop yield and quality. Therefore, the lack of nighttime temperature in winter greenhouses makes it difficult for crops to survive the winter safely, and the decline in crop yield and product quality has become a bottleneck for the healthy and sustainable development of solar greenhouses. The traditional heating method consumes a large amount of non-renewable fossil fuels, which not only increases production costs, but also produces a large amount of harmful gases that pollute the environment. How to fully and actively store and utilize solar energy, improve the heat preservation and heat storage capacity of solar greenhouses, and seek more effective measures for heating at night in winter have become key technical issues for the future development of solar greenhouses.

Over the years, many domestic scholars have carried out a lot of research on how to improve the utilization of solar energy in solar greenhouses and improve the heat storage and release capacity. Generally speaking, most of the research is based on the idea of enhancing the heat storage capacity of the back wall. The improvement of this passive heat storage and heat release capacity is limited, and the problem of low temperature at night, especially in the second half of the night, has not been completely solved; in the past five years , store the excess solar energy during the day in various ways, such as the application of ground heat exchange systems in plastic greenhouses, and the use of polyolefin resin material solar collectors in greenhouses to store heat in water tanks and shallow soil , Small-scale greenhouses use external solar water heating systems and other methods to actively release heat back into the greenhouse when the temperature is low at night. This method of actively storing and releasing heat has gradually become a research hotspot. Solar energy is the main source of greenhouse energy and has significant advantages, and water is easily available as a heat storage medium, so solar water heating technology has a broad prospect. How to further reduce the investment cost and how to improve the heat storage and heat storage efficiency of water as a medium are the problems that need to be solved urgently.

In addition, the inherent defects of the main structure of the solar greenhouse greatly reduce the effective utilization rate of the land. Compared with large-scale greenhouses, the effective land utilization rate of solar greenhouses is mainly restricted by the following three factors: ① small-span structure is adopted, so the marginal effect is relatively increased, resulting in a significant decrease in land effective area ratio; ② the phenomenon of land occupation by the back wall of the greenhouse is prominent , First, the wall itself has an obvious land occupation effect, which is more prominent when the wall is thicker; second, the marginal effect formed by the wall limits the effective use of the land near the wall; ③ in the greenhouse group with a certain scale , In order to avoid the mutual shading effect between the greenhouses, a fairly wide open space must be reserved between the front and rear greenhouses, and the phenomenon of land waste is also obvious. Due to the above reasons, the land utilization rate of solar greenhouses is generally only about 40%. The main structure of the greenhouse is an important factor affecting the internal environmental performance. Research on it is an effective and economical way to change the environmental factors that affect crop production. It is important for improving the productivity and resource utilization of the greenhouse, reducing costs, and ensuring safe and stable production. significance.

Contents of the invention

The purpose of the present invention is to provide a greenhouse type solar greenhouse with a solar energy collection and storage system and its application, which is characterized in that a solar energy collection and storage system and a three-dimensional cultivation system are installed in the greenhouse type solar greenhouse:

The greenhouse-type solar greenhouse is a combination of a solar greenhouse and a greenhouse with galvanized steel pipes 6 as the skeleton. A row of upright columns 1 is arranged in the greenhouse, the distance between north and south is 3m, and 8 tie rods 2 are arranged indoors, 4 on each side. Vents 3 and 4 are set up and down, and the upper edge of the upper air port 3 is set at 1.5m away from the ridge, and the width of the air vent is 80cm; the lower edge of the lower air port 4 is set at the arc length 50cm of the front sole, and the width of the air port is 80cm. Only the north (rear) wall of the greenhouse type solar greenhouse is a non-transparent enclosure structure, and the other sides are transparent; a single-layer plastic film + single insulation quilt, or a double-layer plastic film + single insulation quilt structure is used for light transmission and heat preservation .

The solar energy collection and heat storage system includes: control system 5, galvanized steel pipe 6, water inlet branch pipe 7, ball valve 8, flow meter 9, pressure gauge 10, temperature sensor 11, water inlet main pipe 12, submersible pump 13, water storage Pool 14, float valve 15, return water main pipe 16 and return water pipe 17 on the same journey; in the greenhouse type solar greenhouse, the control system 5 is fixed at the entrance end of the greenhouse, and the main water inlet pipe 12 is fixedly connected with the water inlet branch pipe 7, symmetrically fixed on On the galvanized steel pipes 6 on both sides of the greenhouse, the return water main pipe 16 is fixed on the top of the greenhouse and connected with the same-way return water pipe 17, and the same-way return water pipe 17 is fixed near the water inlet main pipe 12 at the bottom of both sides of the greenhouse; the water inlet main pipe 12 It is connected with the submersible pump 13 and extends below the liquid level of the reservoir 14. A temperature sensor 11, a pressure gauge 10, a flow meter 9 and a ball valve 8 are successively installed at the water inlet main pipe 12 near the reservoir 14 near the surface. Float valve 15 is installed in pond 14 inboards. The reservoir 14 is below the ground; wherein, the control system 5 is mainly composed of a temperature sensor for measuring air temperature and water temperature, and a PLC control cabinet;

The three-dimensional cultivation system includes: cultivation support 18, cultivation pipeline 19, cultivation pipeline slot 20, water inlet pipe 21, drip irrigation pipe 22, return water pipe 23; , the cultivation pipeline 19 is arranged in the cultivation pipeline slot 20;

The cultivation pipe 19 is used to hold the nutrient solution of cultivated plants during hydroponics, or to hold the solid substrate during substrate cultivation; the cultivation pipe 19 not only has the function of carrying, but also has the functions of heat collection and heat storage; the pipeline is made of PVC or PE material; in the three-dimensional cultivation heat storage system, when the substrate cultivation method is adopted, a drip irrigation pipe 22 is arranged on the cultivation pipeline 19, and the drip irrigation pipe 22 is a nutrient solution for drip irrigation of crops in the substrate during substrate cultivation.

The heat collection pipeline in the solar heat collection and storage system includes a water inlet main pipe, a water return main pipe, a water inlet branch pipe, and a return water pipe on the same journey, all of which are PE pipes.

The water inlet pipe, the drip irrigation pipe and the water return pipe in the three-dimensional cultivation system are all PE pipes.

The heat collection and storage process and application of the greenhouse-type solar greenhouse include a heat collection and storage method of a solar heat collection and heat storage system and a heat collection and storage method of a solar heat collection and heat storage system, including the following steps:

a. First, install the heat-collecting PE pipe on the galvanized steel pipe skeleton of the greenhouse-type solar greenhouse; the reservoir is located below the ground level of the greenhouse, and heat insulation and anti-seepage treatment are performed on the reservoir to improve thermal insulation performance and prevent water seepage;

b. On sunny days in the cold season, open the single insulation quilt on the greenhouse-type solar greenhouse, and the solar radiation enters the greenhouse-type solar greenhouse, so that the water temperature in the heat-collecting PE pipe fixed on the skeleton increases gradually. When the indoor temperature rises When the set temperature is reached, the control system automatically controls the system to start heat collection and heat storage: the water circulation is forced through the water pump, so that the heated water in the PE pipe circulates into the reservoir, and then the water with a lower temperature in the reservoir circulates into the PE pipe. tube for heat collection;

c. When the indoor air temperature drops to the set value, or the temperature of the water in the reservoir is high, the control system shuts down the submersible pump and ends the heat collection process;

d. Every year from November to April of the next year (adjusted according to the geographical location of the greenhouse, climate conditions and the actual situation of the year), repeat step b every day step c;

e. From November to April of the next year (adjusted according to the geographical location of the greenhouse, climate conditions and the actual situation of the year), the long edge of the cultivation frame in the three-dimensional cultivation system is placed in the greenhouse type solar greenhouse along the north-south direction,

f. Fill the cultivation pipeline with solid substrate or nutrient solution for soilless cultivation; the substrate cultivation method requires the substrate to have a strong water holding capacity and can store a large amount of water, and the nutrient solution cultivation method requires the cultivation pipeline to have a larger diameter; Wherein, when using the nutrient solution for soilless cultivation, the system does not need the drip irrigation pipe 22;

g. The cultivation pipeline is suitable for cultivating leafy vegetables or low crops.

The beneficial effect of the present invention is that compared with the prior art, the greenhouse-type solar greenhouse composed of PE pipe heat storage and three-dimensional cultivation system heat storage in the present invention: the surplus solar heat energy in the storage room during the day is used to transfer heat into the greenhouse at night. Supplement heat, and the cost of PE clarinet is low, easy to control, and can fully improve the utilization efficiency of solar energy. The three-dimensional cultivation frame provided by the present invention plays the dual role of cultivation and heat storage at the same time, reasonably collocates different varieties of crops, establishes a multi-variety and multi-level main structure model, and makes light, heat and water resources of different heights It has been fully utilized, so a higher economic output has been obtained. The invention has the important significance of improving the productivity and resource utilization rate of the greenhouse, reducing the cost and ensuring safe and stable production. The present invention combines facility structure and materials, environmental control technology and equipment, and utilizes necessary facilities and equipment to create a suitable growth and development environment for production objects, realize the organic combination of engineering and cultivation, and make facility agriculture high-quality, high-yield and efficient. . The system of the invention is easy to operate and maintain, and is a new direction for the development of energy-saving solar greenhouses.

Description of drawings

Figure 1 is a schematic diagram of a greenhouse-type solar greenhouse.

Fig. 2 is a schematic side view of the heat storage of the PE tube set.

FIG. 3 is a schematic top view of FIG. 2 .

Fig. 4 is a front view of the three-dimensional cultivation system.

FIG. 5 is a side view of FIG. 4 .

Fig. 6 is a schematic diagram of a greenhouse-type solar greenhouse applied to three-dimensional cultivation.

Labels in the figure: column-1, tie rod-2, upper vent-3, lower vent-4, control system-5, galvanized steel pipe-6, water inlet branch-7, ball valve-8, flow meter-9 , pressure gauge-10, temperature sensor-11, water inlet main pipe-12, submersible pump-13, water storage tank-14, float valve-15, return water main pipe-16, same journey return water pipe-17. Cultivation support 18, cultivation pipeline 19, cultivation pipeline clamping groove 20, water inlet pipe 21, drip irrigation pipe 22, return water pipe 23.

detailed description

The present invention provides a greenhouse-type solar greenhouse with a solar energy collection and heat storage system and its application. The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

Figure 1 shows a schematic diagram of a greenhouse-type solar greenhouse, which is a combination of a solar greenhouse and a greenhouse with a galvanized steel pipe 2 as the skeleton, and its main feature is: the east-west direction of the ordinary solar greenhouse is changed to a greenhouse. North-south direction, the length can reach 60-100m; the span of ordinary solar greenhouses and greenhouses is only 8-12m, while the span of greenhouse-type solar greenhouses can reach 20-30m; Transparent maintenance structure, while only the north (rear) wall of the greenhouse type solar greenhouse is a non-transparent enclosure structure, and the other sides are transparent; the front roof of the solar greenhouse adopts a single-layer plastic film + insulation quilt for light transmission and heat preservation. Ordinary greenhouses use single-layer plastic film or double-layer plastic film for light transmission and heat preservation, while the greenhouse-type solar greenhouse draws on the advantages of both, using single-layer plastic film + insulation quilt (single film and single quilt) or double-layer plastic film +The heat preservation quilt (double film single quilt) structure transmits light and keeps heat. The shed is designed to run north-south, with a length of 100m and a spacing of 1m between the arches. The span is 20m and the ridge height is 6m. A row of columns 1 are arranged in the greenhouse type solar greenhouse, and the distance between north and south is 3m. 8 tie rods 2 are arranged indoors, 4 on each side. The upper and lower air vents 3 and 4 are set, and the upper edge of the upper air port is set at 1.5m from the ridge height, and the air port is 80cm wide; the lower edge of the lower air port is set at the 50cm arc length of the front foot, and the air port is 80cm wide.

The implementation example of heat storage of PE pipe collection in the novel greenhouse type solar greenhouse involved in the present invention is as follows:

As shown in Figure 2, the main water inlet pipe 12 is fixedly connected with the water inlet branch pipe 7, and is symmetrically fixed on the galvanized steel pipes 6 on both sides of the new greenhouse type solar greenhouse, and the main return water pipe 16 is fixed on the top of the greenhouse and the return water pipe 17 on the same journey. Connected, the return pipe 17 of the same journey is fixed at the position near the main water inlet pipe 12 at the bottom of both sides of the greenhouse. Arrange temperature sensors 11 in the air and in the reservoir to measure air temperature and water temperature for the operation of the automatic control system of the control system; arrange temperature sensors 11 at the water inlet and water outlet. Ball valve 8 controls the flow of water supply and return. Compared with the traditional solar greenhouse, the new greenhouse-type solar greenhouse does not have any heat storage structure, so it needs more heat supply in the cold season, so the volume of the reservoir 14 of the greenhouse is 40m ³ , and the size of the reservoir 14 Specifically, it is also related to the total area of the new greenhouse-type solar greenhouse. The submersible pump is a submersible pump with a rated power of 550W and a head of 10m.

Since the heat storage system collects heat on both sides, the heat collection area is relatively larger than that of the traditional solar greenhouse, and the heat storage in sunny days can generally reach 300-400MJ.

As shown in Figure 3, the interval between adjacent water inlet branch pipes is 1.5m, and the return water pipe 17 in the greenhouse is connected to the end of the greenhouse return water main pipe 16, and is laid along the water inlet main pipe 12 from the framework on both sides of the new greenhouse type solar greenhouse , into the reservoir 14.

In the case of the PE tube heat storage system, the pipeline is a drip irrigation PE pipeline with a size of φ16 or φ20.

Usually, the distribution of light intensity in the greenhouse decreases vertically from top to bottom. This system is installed on the framework of the new greenhouse type solar greenhouse, which makes full use of the surplus solar radiation in the greenhouse during the day and uses it for nighttime supplementation, usually in cold seasons. The temperature at night can be increased by 2-4°C. The space utilization efficiency of the greenhouse is improved and the shading effect is small. Since the nighttime temperature of the solar greenhouse is low from November to April of the next year and under special weather, it needs to be heated. Therefore, the system mainly operates from November to April of the next year.

The heat storage running time of the system is automatically controlled by the control system.

The conditions for the start of heat storage operation are: when the indoor temperature rises to the set 22°C, the system automatically controls the system to start heat storage; when the indoor temperature drops to the set value, or the temperature of the water in the reservoir is already high , the system stops heat storage.

A method for using a PE pipe heat storage system contained in the system of the present invention comprises the following steps:

a. Install the PE pipe heat storage system in a new-style greenhouse type solar greenhouse, and fix it on the galvanized pipe 2 skeleton. The capacity of the reservoir 14 can be 2m ³ /100m ² (greenhouse floor area) standard configure. Taking the 2000m ² new type greenhouse as an example, a 40m ³ heat storage pool can be configured.

b. In fine weather, according to the relationship between the air temperature and the water temperature in the drip irrigation PE pipe, the system will automatically start running or shutting down: when the indoor temperature rises to 22°C, the system will automatically control the system to start heat storage, and when the temperature of the water in the reservoir reaches At 35°C, the system stops heat storage.

c. At night in winter, the air temperature in the greenhouse should generally not be lower than 12°C. When the temperature sensor in the greenhouse detects that the temperature in the greenhouse drops to 13°C, the system starts to run; when the temperature in the greenhouse reaches the set 15°C temperature, the system stops running; When the difference between the internal air temperature and temperature is not greater than 1°C, the system shuts down;

d. From November to next April (adjusted according to the geographical location and climate conditions of the greenhouse), repeat steps b to c every day.

The implementation example of the three-dimensional cultivation heat storage system in the novel greenhouse type solar greenhouse involved in the present invention is as follows:

As shown in Figure 4, a plurality of cultivation pipe slots 20 are affixed to both sides of the cultivation support 18, and the water inlet pipe 21 is sequentially connected to the upper end of one side of the pipe slots 20 and the cultivation pipe 19; the cultivation pipe 19 is arranged on the cultivation pipe. card slot 20. If adopt substrate cultivation, lay drip irrigation pipe 22 on the substrate in cultivation pipeline 19, if adopt nutrient solution cultivation, then do not lay drip irrigation pipe 22; Return pipe 23 flows back in the cultivation nutrient solution pool.

The three-dimensional cultivation and heat collection system involved in the present invention has an "A"-shaped cultivation frame, generally with 3 to 5 cultivation grooves on one side, and placed in a greenhouse.

As shown in FIG. 5 , leafy vegetables such as lettuce, or low-growing tomatoes, green peppers and peppers are generally planted in the cultivation pipeline 19 . When the substrate is used for cultivation, the drip irrigation pipe 22 is laid on the substrate, and the drip irrigation pipe 22 drips the nutrient solution for planting crops into the substrate. The matrix requires strong water holding capacity and high water content, generally about 70-80%; a return pipe 23 is provided at the bottom of the cultivation pipeline 19, and excess water and fertilizer are returned to the cultivation liquid pool through the return pipe 23.

As shown in Figure 6, for a three-dimensional cultivation heat collection and heat storage system, the long side of the cultivation frame should be placed along the north-south direction.

In the three-dimensional cultivation heat storage system, the cultivation pipes 19 are all PVC pipes, and the diameter of the pipes is φ180cm.

The light conditions in the new-style greenhouse type solar greenhouse are good. The system is arranged in the greenhouse, which makes full use of the surplus solar radiation in the greenhouse during the day, and is used for supplementing the temperature near the crop growing area at night. Usually, the night temperature can be increased by about 3°C in the cold season. The system is mainly in operation from November to April of the following year.

The method for three-dimensional cultivation in a greenhouse-type solar greenhouse with a solar energy collection and heat storage system of the present invention comprises the following steps:

a. When a three-dimensional cultivation heat collection and heat storage system is applied in a new type of greenhouse-type solar greenhouse, the long side of the cultivation frame should be placed along the north-south direction; the distance between two adjacent cultivation frames is 1m, and two on the same side The distance between the cultivation pipes is 0.8m;

b. Cultivation pipes can be filled with solid substrate or nutrient solution for soilless cultivation. The substrate requires strong water holding capacity and high water content, generally around 70-80%. Nutrient solution cultivation requires cultivation pipes with a larger diameter to store A large amount of nutrient solution; wherein, when using nutrient solution for soilless cultivation, the system does not need drip irrigation pipe 22;

c. The cultivation pipeline is suitable for cultivating leafy vegetables or low-growing varieties;

d. The system is applicable from November to March-April of the next year (adjusted according to the geographical location of the greenhouse, climate conditions and the actual situation of the year).

Claims (4)

1. A greenhouse type solar greenhouse with a solar energy collection heat storage system is characterized in that a solar energy collection heat storage system and a three-dimensional cultivation system are installed in the greenhouse type solar greenhouse: The greenhouse-type solar greenhouse is a combination of a solar greenhouse and a greenhouse with a galvanized steel pipe (6) as the skeleton, designed to run north-south, with a length of 60-100m, an arch spacing of 1m, a span of 20-30m, and a ridge height of 6m; A row of upright columns (1) are arranged in the type solar greenhouse, the distance between north and south is 3m, and 8 tie rods (2) are arranged indoors, 4 on each side. The upper and lower air vents (3) (4) are set, and the upper edge of the upper air port (3) is set at 1.5m away from the ridge, and the air port is 80cm wide; The vents are 80cm wide. Only the north (rear) wall of the greenhouse type solar greenhouse is a non-transparent enclosure structure, and the other sides are transparent; a single-layer plastic film + single insulation quilt, or a double-layer plastic film + single insulation quilt structure is used for light transmission and heat preservation . The solar heat collection and storage system includes: control system (5), galvanized steel pipe (6), water inlet branch pipe (7), ball valve (8), flow meter (9), pressure gauge (10), temperature sensor (11 ), main water inlet pipe (12), submersible pump (13), reservoir (14), ball float valve (15), main water return pipe (16) and return water pipe (17) in the same way; in the greenhouse type solar greenhouse , the control system (5) is fixed at the entrance of the greenhouse, the water inlet main pipe (12) is fixedly connected with the water inlet branch pipe (7), symmetrically fixed on the galvanized steel pipes (6) on both sides of the greenhouse, and the return water main pipe (16) It is fixed on the top of the greenhouse and connected with the return water pipe (17) of the same journey, and the return water pipe (17) of the same journey is fixed near the main water inlet pipe (12) at the bottom of both sides of the greenhouse; the main water inlet pipe (12) is connected with the submersible pump (13) Connect to each other and stretch below the liquid level of the reservoir (14), install temperature sensor (11), pressure gauge (10), flow meter ( 9) and ball valve (8), ball float valve (15) is installed in reservoir (14) inboard. The water reservoir (14) is below the ground; wherein, the control system (5) is mainly composed of a temperature sensor for measuring air temperature and water temperature, and a PCL control cabinet; The three-dimensional cultivation system includes: a cultivation support (18), a cultivation pipeline (19), a cultivation pipeline slot (20), a water inlet pipe (21), a drip irrigation pipe (22), and a return pipe (23); wherein a plurality of cultivation pipelines Draw-in groove (7) is affixed to the both sides of cultivation support (18), and cultivation pipeline (19) is arranged in the cultivation pipeline draw-in groove (20); The upper ends of one side are connected successively, and the water return pipe (23) is arranged at the bottom of the cultivation pipeline (19). The cultivation pipeline (19) is used to hold the nutrient solution of cultivated plants during hydroponics, or to support the solid substrate during substrate cultivation; the cultivation pipeline (19) not only has the function of bearing, but also has the functions of heat collection and heat storage; The pipeline is made of PVC or PE material; in the three-dimensional cultivation heat storage system, when the substrate cultivation method is adopted, a drip irrigation pipe (22) is arranged on the cultivation pipeline (19), and the drip irrigation pipe (22) is used for feeding the substrate during substrate cultivation. A nutrient solution for drip irrigation growing crops in a substrate. 2. According to claim 1, there is a greenhouse-type solar greenhouse with a solar energy storage and storage system, wherein the heat collection pipeline in the solar energy storage and storage system includes a water inlet main pipe, a return water main pipe, a water inlet branch pipe, The return pipes in the same journey are all PE pipes. 3. The greenhouse-type solar greenhouse with a solar energy collection and heat storage system according to claim 1, wherein the water inlet pipe, the drip irrigation pipe and the water return pipe in the three-dimensional cultivation system are all PE pipes. 4. The application of a greenhouse-type solar greenhouse with a solar energy collection and heat storage system according to claim 1, wherein the process of collecting heat in the greenhouse-type solar greenhouse is applied to three-dimensional cultivation and includes the following steps: a. First, install the heat-collecting PE pipe on the galvanized steel pipe skeleton of the greenhouse-type solar greenhouse; the reservoir is located below the ground level of the greenhouse, and heat insulation and anti-seepage treatment are performed on the reservoir to improve thermal insulation performance and prevent water seepage; b. On sunny days in the cold season, open the single insulation quilt on the greenhouse-type solar greenhouse, and the solar radiation enters the greenhouse-type solar greenhouse, so that the water temperature in the heat-collecting PE pipe fixed on the skeleton increases gradually. When the indoor temperature rises When the set temperature is reached, the control system automatically controls the system to start heat collection and heat storage: the water circulation is forced through the water pump, so that the heated water in the PE pipe circulates into the reservoir, and then the water with a lower temperature in the reservoir circulates into the PE pipe. tube for heat collection; c. When the indoor air temperature drops to the set value, or the temperature of the water in the reservoir is high, the control system shuts down the submersible pump and ends the heat collection process; d. Every year from November to April of the next year (adjusted according to the geographical location of the greenhouse, climate conditions and the actual situation of the year), repeat every day e. From November to April of the next year (adjusted according to the geographical location of the greenhouse, climate conditions and the actual situation of the year), the long edge of the cultivation frame in the three-dimensional cultivation system is placed in the greenhouse type solar greenhouse along the north-south direction, f. Fill the cultivation pipeline with solid substrate or nutrient solution for soilless cultivation; the substrate cultivation method requires the substrate to have a strong water holding capacity and can store a large amount of water, and the nutrient solution cultivation method requires the cultivation pipeline to have a larger diameter; Wherein, when using the nutrient solution for soilless cultivation, the system does not need the drip irrigation pipe 22; g. The cultivation pipeline is suitable for cultivating leafy vegetables or low crops.