Agricultural facility solar soil storage and heating system

Abstract

This invention provides a solar-powered soil-based heat storage and supply system for agricultural facilities, addressing various problems encountered in the winter heating and dehumidification processes of existing facilities. The system comprises a solar concentrating heat collection module and a heat transport module. The solar concentrating heat collection module is located outside the agricultural facility, collecting and concentrating sunlight to heat the circulating medium air flowing through it, thus providing hot air to the heat transport module. The heat transport module includes a heat delivery pipe, a heat exchange pipe, and a fan. The heat exchange pipe is located in the soil within the agricultural facility, with both ends connected to the corresponding solar concentrating heat collection module via heat delivery pipes. A fan is installed on one end of the heat delivery pipe. A deformable insulation plate is embedded inside the heat exchange pipe, dividing the interior of the heat exchange pipe into upper and lower spaces. The deformable insulation plate allows hot air to flow through either the upper or lower space by changing its position and / or shape.

Description

Technical Field

[0001] This invention relates to a heat storage and supply system, specifically to a solar soil heat storage and supply system for agricultural facilities, belonging to the field of solar energy utilization technology for agricultural facilities. Background Technology

[0002] Agricultural facilities require precise control of light and heat during crop cultivation, with the thermal environment being a key factor in ensuring photosynthesis, nutrient absorption, and fruit development.

[0003] However, in actual planting, agricultural facilities still have the following problems:

[0004] ① While the facilities can accumulate some solar heat during winter when there is sunshine, heat loss is severe when there is no sunshine, especially during cloudy or snowy weather, which can easily lead to excessively low crop temperatures, resulting in growth stagnation or frost damage; ② Low-temperature soil inhibits root activity and nutrient transport, causing problems such as low temperature, high humidity, and numerous diseases within the facilities; ③ Existing soil warming measures have shortcomings such as low heat utilization rate, uncontrollable regulation, and asynchronous heat storage and supply. Moreover, they only heat the air inside the facilities, making it difficult to effectively raise soil temperature and achieve thermal environment regulation that matches the heat requirements of crop rhizosphere. Summary of the Invention

[0005] In view of this, the present invention provides a solar soil storage and heating system for agricultural facilities to solve various problems existing in the process of heating and dehumidifying in winter.

[0006] The technical solution of this invention is: an agricultural facility solar soil storage and heat supply system, comprising: a solar concentrating heat collection module and a heat transport module;

[0007] The solar concentrating and heat collection module is arranged outside the agricultural facility to collect and concentrate sunlight and heat the circulating medium air flowing through it, so as to provide hot air to the heat transport module.

[0008] The heat transport module includes: a heat supply pipe, a heat exchange pipe, and a fan; the heat exchange pipe is located in the soil within the agricultural facility, and its two ends are connected to the corresponding solar concentrating and collecting modules via heat supply pipes; a fan is installed on one end of the heat supply pipe.

[0009] The heat exchange tube is fitted with a deformable heat insulation plate; the deformable heat insulation plate divides the interior of the heat exchange tube into upper and lower spaces, and the deformable heat insulation plate allows hot air transported from the solar concentrator to flow through its upper or lower space by changing its position and / or shape.

[0010] Inside the agricultural facility, the soil above the heat exchange pipes is the heating layer soil, and the soil below the heat exchange pipes is the heat storage layer soil.

[0011] As a preferred embodiment of the present invention: by switching the blower and induced draft modes, the air inlet direction of the heat exchange tube is changed, and the position and / or shape of the deformable heat insulation plate is changed by the airflow in the heat exchange tube.

[0012] In a preferred embodiment of the present invention: the deformable heat insulation plate divides the internal space of the heat exchange tube into an upper wedge-shaped space and a lower wedge-shaped space; the large openings of the upper wedge-shaped space and the lower wedge-shaped space are respectively located at both ends of the heat exchange tube;

[0013] When the airflow enters the heat exchange tube from the large opening side of the upper wedge-shaped space, the deformable heat insulation plate bends and deforms downward under the action of the airflow; when the airflow enters the heat exchange tube from the large opening side of the lower wedge-shaped space, the deformable heat insulation plate bends and deforms upward under the action of the airflow.

[0014] As a preferred embodiment of the present invention, the deformable heat insulation plate is formed by connecting multiple slender strips of elastic deformable grids along the width direction.

[0015] As a preferred embodiment of the present invention: the deformable heat insulation plate is foldable along the width direction, one end of which is fixed at the horizontal diameter position of the heat exchange tube, and the other end is slidably engaged with the arc-shaped slide rail provided on the end contour of the heat exchange tube by a slider.

[0016] There are two arc-shaped slide rails, symmetrically arranged on the left and right, and located in the middle part of the end profile of the heat exchange tube; the deformable heat insulation plate is slidably engaged with the corresponding arc-shaped slide rail on the left and right sides by sliders; the upper end of the arc-shaped slide rail is provided with an upper limit position, and the lower end is provided with a lower limit position; the upper limit position is located above the horizontal diameter of the heat exchange tube end, and the lower limit position is located below the horizontal diameter of the heat exchange tube end.

[0017] At the end of the heat exchange tube where the arc-shaped slide rail is located, there is a baffle plate. The upper end of the baffle plate is connected to the heat exchange tube, and the lower end is a movable end. When hot air enters the heat exchange tube from the end where the baffle plate is located, the baffle plate is in a naturally drooping state and blocks the upper space of the heat exchange tube at that end. When hot air enters the heat exchange tube from the end where the baffle plate is not located, it can push the baffle plate outward.

[0018] As a preferred embodiment of the present invention: the deformable heat insulation plate is made of an elastic material, which can deform under airflow disturbance.

[0019] When the air flow rate in the upper space of the heat exchange tube is large, the deformable heat insulation plate bends downward inside the heat exchange tube; when the air flow rate in the lower space of the heat exchange tube is large, the deformable heat insulation plate bends upward inside the heat exchange tube.

[0020] As a preferred embodiment of the present invention, it further includes a dehumidification module;

[0021] The dehumidification module includes: an air inlet pipe, an air outlet pipe, and a heat exchange pipe shared with the heat transport module; the upper end of the air inlet pipe extends out of the soil inside the agricultural facility; the part of the air inlet pipe exposed above the soil has multiple air inlets that communicate with the internal space of the agricultural facility along the circumferential direction.

[0022] The lower end of the air inlet pipe extends into the soil and connects with the heat exchange pipe, and an air baffle is provided at the connection point; when in the heat storage state or when the fan stops running, the air baffle is in a natural downward state, blocking the upper space inside the heat exchange pipe at that end; when in the heating state, the hot air in the upper space inside the heat exchange pipe can push the air baffle outward.

[0023] The bottom of the heat exchange tube is provided with multiple heat-conducting water collection tubes that communicate with the soil along its length.

[0024] The exhaust pipe is a cylindrical pipe that is smaller at the top and larger at the bottom, which can create a chimney effect; the upper end of the exhaust pipe extends out of the soil inside the agricultural facility; the lower end extends into the soil and connects with the heat exchange pipe; the height of the exhaust pipe is greater than the height of the intake pipe.

[0025] Rotatable air caps are provided in the air outlet pipe and the air inlet pipe.

[0026] As a preferred embodiment of the present invention, the heat supply pipe is wrapped with insulation material.

[0027] As a preferred embodiment of the present invention, the solar concentrating heat collection module is composed of multiple composite parabolic concentrating heat collection devices connected in series or / and in parallel.

[0028] Beneficial effects:

[0029] (1) This invention integrates solar energy efficient heat collection, heat storage and on-demand heating design to achieve controllable storage and on-demand release of heat energy, thereby improving the temperature conditions of crop rhizosphere in winter and enhancing the energy utilization efficiency and production stability of agricultural facilities; and only by changing the position and / or shape of the deformable heat insulation plate, the hot air transported from the solar concentrating heat collection module can flow through its upper or lower space, thereby achieving the switching between heating and heat storage, and the overall structure is simple.

[0030] (2) The present invention can separate the heat storage and heat supply states by switching the blower blowing and induced draft modes according to the heat energy demand of crops in agricultural facilities, thereby improving the controllability of soil heating.

[0031] (3) By changing the position and shape of the deformable heat insulation plate, the present invention can increase the volume of the upper space of the heat exchange tube during heating and the volume of the lower space of the heat exchange tube during heat storage, thereby improving the efficiency of heat storage and heating.

[0032] (4) In this invention, the setting of the air inlet pipe and the air outlet pipe can achieve the effect of daytime supply and nighttime replenishment. That is, when there is sunshine, the hot air directly heats the soil inside the facility, and when there is no sunshine, the heat energy in the soil of the heat storage layer is extracted by the chimney effect of the air outlet pipe to heat the air inside the facility.

[0033] (5) In this invention, a heat-conducting water collection pipe is provided on the heat exchange tube, which can remove excess moisture in the air when there is no sunlight in the facility. At the same time, the water can enhance the heat transfer of the heat storage layer after entering the soil, and the whole process does not require driving energy consumption. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the solar soil storage and heating system for agricultural facilities according to the present invention;

[0035] Figure 2 This is a schematic diagram of the arrangement of the deformable heat insulation plate inside the heat exchange tube in Example 2;

[0036] Figure 3 This is a schematic diagram of the arrangement of the deformable heat insulation plate inside the heat exchange tube in Example 3;

[0037] Figure 4 This is a schematic diagram showing the direction of hot air during heating.

[0038] Figure 5 This is a schematic diagram showing the direction of hot air during thermal storage.

[0039] Figure 6 This is a schematic diagram of the airflow during dehumidification and heat replenishment in the solar soil storage and heating system for agricultural facilities according to the present invention;

[0040] Figure 7 This is a cross-sectional schematic diagram of the solar soil storage and heating system for agricultural facilities of the present invention during dehumidification and heat replenishment.

[0041] Among them: 1-Agricultural facilities; 2-Composite parabolic concentrating solar collector; 3-Solar concentrating solar collector module; 4-Fan; 5-Insulation material; 61-Heat pipe A; 62-Heat pipe B; 7-Soil for heat storage layer; 8-Soil for heating layer; 9-Heat exchange pipe; 10-Air inlet pipe; 11-Rotating air cap; 12-Air inlet; 13-Dust cap; 14-Deformable heat insulation board; 15-Air outlet pipe; 16-Air outlet; 17-Air baffle; 18-Heat-conducting water collection pipe; 19-Lower wedge-shaped space; 20-Upper wedge-shaped space; 21-Arc-shaped slide rail; 22-Upper limit position; 23-Lower limit position. Detailed Implementation

[0042] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0043] Example 1:

[0044] This embodiment provides an agricultural facility solar soil storage and heating system. Through the integrated design of high-efficiency solar heat collection, heat storage and on-demand heating, it realizes the controllable storage and on-demand release of heat energy, thereby improving the rhizosphere temperature conditions of crops in winter and enhancing the energy utilization efficiency and production stability of facility agriculture.

[0045] like Figure 1 As shown, the solar soil heat storage and supply system is used for heat storage in agricultural facility 1, and includes: a solar concentrating heat collection module 3 and a heat transport module.

[0046] As an example, such as Figure 1 As shown, agricultural facility 1 includes: soil (here, soil refers to the soil within the area surrounded by the agricultural facility), a north wall, east and west gable walls, an arc-shaped steel frame structure anchored at one end in the foundation on the south side and connected to the top of the north wall at the other end, a plastic film covering the surface of the steel frame structure (used to form a closed, insulated space), an insulating quilt laid outside the plastic film (the upper edge of which is fixed to the top of the north wall), and a roller shutter machine for driving the insulating quilt to roll up and down; in addition, the agricultural facility is also equipped with ventilation openings with insect-proof nets.

[0047] The solar concentrating heat collection module 3 is arranged outside the agricultural facility 1 to collect and concentrate sunlight and heat the circulating medium air flowing through it to provide heat to the heat transport module.

[0048] As an example, several composite parabolic solar concentrators 2, arranged on the ground outside the south side of agricultural facility 1, are connected in series and / or in parallel to form a solar concentrator module 3. The solar concentrator module 3 collects and concentrates sunlight under sunny conditions and heats the air circulating inside it.

[0049] The heat transport module is installed in the soil inside the agricultural facility 1. It is used to transport hot air that has been heated by the solar concentrating and collecting module 3. The hot air exchanges heat with the soil and cools down. It is then transported to the low-temperature end of the solar concentrating and collecting module 3. The low-temperature air re-enters the solar concentrating and collecting module 3 to achieve a stepped temperature rise. Then, the heat energy is transported to the soil inside the agricultural facility 1, and this cycle is repeated. Moreover, the heat transport module can switch between heating mode and heat storage mode by switching the airflow direction.

[0050] like Figure 3As shown, the heat transport module includes: heat supply pipe A61, heat supply pipe B62, heat exchange pipe 9, and fan 4; wherein the heat exchange pipe 9 is located at a certain depth in the soil of agricultural facility 1 and runs east-west, and a deformable heat insulation plate 14 is embedded inside the heat exchange pipe 9 along the east-west direction; the deformable heat insulation plate 14 is made of a material with poor thermal conductivity to achieve heat insulation. The deformable heat insulation plate 14 divides the interior of the heat exchange pipe 9 into upper and lower spaces, and the deformable heat insulation plate 14 allows hot air transported from the solar concentrating heat collection module 3 to flow through its upper or lower space by changing its position and / or shape.

[0051] Inside agricultural facility 1, the soil above heat exchanger pipe 9 is the heating layer soil 8, and the soil below heat exchanger pipe 9 is the heat storage layer soil 7. When hot air (all or most of it) transported by solar concentrating heat collection module 3 flows through the upper space inside heat exchanger pipe 9, the hot air in the upper space of heat exchanger pipe 9 exchanges heat with the heating layer soil 8, achieving a heating effect; that is, heat exchanger pipe 9 is in a heating state at this time. When hot air (all or most of it) transported by solar concentrating heat collection module 3 flows through the lower space inside heat exchanger pipe 9, the hot air in the lower space of heat exchanger pipe 9 exchanges heat with the heat storage layer soil 7, achieving a heat storage effect; that is, heat exchanger pipe 9 is in a heat storage state at this time.

[0052] Heat supply pipes A61 and B62 have the same structure, including a vertical section above ground and a horizontal section running north-south into the underground soil. Heat supply pipes A61 and B62 are located on the east and west sides of agricultural facility 1, respectively, and are used to connect the heat exchange pipe 9 and the solar concentrating collector module 3 on the corresponding sides. A fan 4 is installed on one of the heat supply pipes.

[0053] As an example, by switching between the blower 4's blower and induced draft modes, the air inlet direction of the heat exchange tube 9 is changed, and the position and / or shape of the deformable insulation plate 14 is changed by the airflow, thereby realizing the switching between the heat supply and heat storage states of the heat exchange tube 9.

[0054] As an example, the outer sides of heat pipes A61 and B62 are wrapped with insulation material 5.

[0055] Therefore, the operating principle of this heat storage and supply system is as follows:

[0056] When the system provides heating, the hot air inside the solar concentrating heat collection module 3 flows through the upper space of the heat exchange tube 9 and exchanges heat with the soil in the heating layer 8 to achieve the heating effect; when the system provides heat storage, the hot air inside the solar concentrating heat collection module 3 flows through the lower space of the heat exchange tube 9 and exchanges heat with the soil in the heat storage layer 7 to achieve the heat storage effect.

[0057] Example 2:

[0058] Based on the above embodiment 1, this embodiment provides a structural form of the deformable heat insulation board 14. In this example, the deformable heat insulation board 14 realizes the switching between heat storage and heat supply modes by changing its own shape under the action of airflow.

[0059] In this example, the deformable heat insulation plate 14 divides the internal space of the heat exchange tube 9 into two wedge-shaped spaces, namely, as shown below. Figure 2 The upper wedge-shaped space 20 and the lower wedge-shaped space 19 are shown; and the large openings of the upper wedge-shaped space 20 and the lower wedge-shaped space 19 are located at both ends of the heat exchange tube 9, respectively. When the airflow enters the heat exchange tube 9 from the large opening side of the upper wedge-shaped space 20, the deformable heat insulation plate 14 bends and deforms downward under the action of the airflow. When the airflow enters the heat exchange tube 9 from the large opening side of the lower wedge-shaped space 19, the deformable heat insulation plate bends and deforms upward under the action of the airflow.

[0060] Thus, through the deformation of the deformable insulation plate 14 inside the heat exchange tube 9, the heat exchange tube 9 has two states: heating and heat storage. When the hot air transported by the solar concentrator module 3 enters the heat exchange tube 9 from the large opening side of the upper wedge-shaped space 20, the airflow in the upper wedge-shaped space 20 of the heat exchange tube 9 is large. Under the action of the airflow, the deformable insulation plate 14 inside bends and deforms downward, and the upper wedge-shaped space 20 increases. Most of the hot air exchanges heat with the heating layer soil 8 through the upper wedge-shaped space 20 of the heat exchange tube 9 to achieve the heating effect. That is, at this time, the heat exchange tube 9 is in the heating state. When the hot air transported by the solar concentrator module 3 enters the heat exchange tube 9 from the large opening side of the lower wedge-shaped space 19, the airflow in the lower wedge-shaped space 19 of the heat exchange tube 9 is relatively large. The deformable heat insulation plate 14 inside it bends and deforms upward under the action of the airflow, and the lower wedge-shaped space 19 increases in size. Most of the hot air exchanges heat with the heat storage layer soil 7 through the lower wedge-shaped space 19 of the heat exchange tube 9, thus achieving the heat storage effect. That is, the heat exchange tube 9 is in a heat storage state at this time.

[0061] As an example, such as Figure 2 As shown, the deformable heat insulation plate 14 is composed of multiple thin strips of elastic deformable grids connected along the width direction. The deformable grids can deform under airflow disturbance. That is, when the airflow in the upper wedge-shaped space 20 is large, the deformable heat insulation plate 14 bends downward under the action of airflow. When the airflow in the lower wedge-shaped space 19 is large, the deformable heat insulation plate 14 bends upward under the action of airflow.

[0062] As an example, when the deformable heat insulation plate 14 is in its normal state (undeformed state), the upper wedge-shaped space 20 of the heat exchange tube 9 has a structure that tapers from west to east, and the lower wedge-shaped space 19 has a structure that tapers from east to west; that is, the large opening of the upper wedge-shaped space 20 is located on the west side, and the large opening of the lower wedge-shaped space 19 is located on the east side. For example, if the heat exchange tube 9 is inclined to form a slope that is higher in the west and lower in the east, the deformable heat insulation plate 14 is arranged horizontally or inclined inside the heat exchange tube 9, forming the aforementioned upper wedge-shaped space 20 and lower wedge-shaped space 19 inside the heat exchange tube 9; or if the heat exchange tube 9 is arranged horizontally, the deformable heat insulation plate 14 is inclined inside the heat exchange tube 9 to form a slope that is higher in the east and lower in the west, thereby forming the aforementioned upper wedge-shaped space 20 and lower wedge-shaped space 19 inside the heat exchange tube 9.

[0063] As an example, heat pipe A61 is located on the east side of agricultural facility 1, with its horizontal end connected to the east end of heat exchange pipe 9, and its vertical top connected to the east end of solar concentrating collector module 3. Heat pipe B62 is located on the west side of agricultural facility 1, with its horizontal end connected to the west end of heat exchange pipe 9, and its vertical top connected to the west end of solar concentrating collector module 3. A fan 4 is installed on heat pipe A61, with its air inlet connected to solar concentrating collector module 3 and its air outlet facing the connection side between heat pipe A61 and heat exchange pipe 9. Thus, in this example, when fan 4 is in blower mode, hot air flows from east to west within heat exchange pipe 9, entering from the large opening side of the lower wedge-shaped space 19. At this time, heat exchange pipe 9 is in a heat storage state, such as... Figure 5 As shown; when the fan 4 is in induced draft mode, hot air flows from west to east inside the heat exchange tube 9, that is, it enters from the large opening side of the upper wedge-shaped space 20. At this time, the heat exchange tube 9 is in a heating state, as shown. Figure 4 As shown.

[0064] Example 3:

[0065] Based on the above embodiment 1, this embodiment provides another structural form of the deformable heat insulation board 14. In this example, the deformable heat insulation board 14 uses the change of its own shape and position under the action of airflow to realize the switching between heat storage and heat supply modes.

[0066] like Figure 3As shown, in this example, the deformable heat insulation plate 14 is a foldable fan shape, meaning it is foldable along its width. One end is fixed at the diameter position in the middle of the heat exchange tube 9, and the other end slides with an arc-shaped slide rail 21 set on the end profile of the heat exchange tube 9 via a slider. There are two arc-shaped slide rails 21, symmetrically arranged on the left and right, located in the middle part of the end profile of the heat exchange tube 9. The deformable heat insulation plate 14 slides with the corresponding arc-shaped slide rail 21 on each side of this end via a slider. The upper end of the arc-shaped slide rail 21 is provided with an upper limit position 22, and the lower end is provided with a lower limit position 23. The upper limit position 22 is located above the horizontal diameter of this end of the heat exchange tube 9, and the lower limit position 23 is located below the horizontal diameter of this end of the heat exchange tube 9. This end of the deformable heat insulation plate 14 can move along the arc-shaped slide rail 21 under airflow disturbance, and the movement position is constrained by the upper and lower limits.

[0067] Furthermore, at the end of the heat exchange tube 9 where the arc-shaped slide rail 21 is located, a baffle plate 17 is installed. The upper end of the baffle plate 17 is connected to the heat exchange tube 9, and the lower end is a movable end; for example Figure 3 As shown, when there is no airflow disturbance inside the heat exchange tube 9, the deformable heat insulation plate 14 at the end of the arc-shaped slide rail 21 is located at the lower limit position 23 (at this time, the internal space of the heat exchange tube 9 is also divided into an upper wedge space 20 and a lower wedge space 19), and the baffle plate 17 is in a natural downward state and blocks the upper wedge space 20 inside the heat exchange tube 9 (that is, the lower end of the baffle plate 17 corresponds to the lower limit position and does not block the lower wedge space 19 at that end).

[0068] Therefore, when the hot air transported by the solar concentrating heat collection module 3 enters from the end of the heat exchange tube 9 equipped with the baffle plate 17, the baffle plate 17 is in a natural downward state and blocks the upper wedge-shaped space 20 of the heat exchange tube 9. At this time, the hot air flows into the lower wedge-shaped space 19 of the heat exchange tube 9 and exchanges heat with the soil 7 of the heat storage layer to achieve the heat storage effect. At this time, the end of the deformable heat insulation plate 14 moves from the lower limit position 23 to the upper limit position 22 along the arc-shaped slide rail 21 under the action of airflow, thereby increasing the volume of the lower wedge-shaped space 19 (although the baffle plate 17 still blocks the upper part of the heat exchange tube 9 at this time, the change in position of the deformable heat insulation plate 14 inside the heat exchange tube can increase the volume of the lower wedge-shaped space 19 and improve the heat storage efficiency).

[0069] When the hot air transported by the solar concentrating heat collection module 3 enters from the end of the heat exchange tube 9 without the baffle plate 17, the hot air pushes up the baffle plate 17. At this time, the other end of the deformable heat insulation plate 14 in the heat exchange tube 9 is located at the lower limit position 23, the volume of the upper wedge space 20 is larger than the volume of the lower wedge space 19, and most of the hot air flows through the upper wedge space 20 and exchanges heat with the heating layer soil 8 to achieve the heating effect.

[0070] Furthermore, in this example, the deformable insulation plate 14 is not only foldable but also made of elastic material, allowing it to deform under airflow disturbance. Thus, when hot air passes through the lower wedge-shaped space 19 of the heat exchange tube 9, the deformable insulation plate 14 bends upward within the heat exchange tube 9, further increasing the volume of the lower wedge-shaped space 19 and improving heat storage efficiency. When most of the hot air passes through the upper wedge-shaped space 20 of the heat exchange tube 9, the deformable insulation plate 14 bends downward within the heat exchange tube 9, further increasing the volume of the upper wedge-shaped space 20 and improving heating efficiency.

[0071] In this example, the heat exchange tube 9 is equipped with an arc-shaped slide rail 21 and a baffle plate 17 at its eastern end, and the fan 4 is mounted on the heat supply tube A61 located on the eastern side. Therefore, when the fan 4 is in the blower state, hot air flows from east to west within the heat exchange tube 9. Because the baffle plate 17 blocks the upper wedge-shaped space 20, the hot air flows through the lower wedge-shaped space 19 of the deformable insulation plate 14 and exchanges heat with the soil in the heat storage layer 7, thus achieving heat storage (at this time, the deformable insulation plate 14 is at the upper limit position 22 at the end where the arc-shaped slide rail 21 is located). When the fan 4 is in the induced draft state, the direction of hot air flow changes to west to east. The hot air lifts the baffle plate 17 and flows through the upper wedge-shaped space 20 of the heat exchange tube 9, exchanging heat with the soil in the heating layer 8, thus achieving heating (at this time, the deformable insulation plate 14 is at the lower limit position 23 at the end where the arc-shaped slide rail 21 is located).

[0072] Example 4:

[0073] Based on the above embodiment 1, embodiment 2 or embodiment 3, the heat storage and supply system further includes a dehumidification module.

[0074] The dehumidification module is used to reduce humidity within agricultural facility 1. For example... Figure 1 , Figure 6 and Figure 7 As shown, the dehumidification module includes: an air inlet pipe 10, an air outlet pipe 15, and a heat exchange pipe 9 shared with the heat transport module; wherein the upper end of the air inlet pipe 10 extends out of the soil inside the agricultural facility 1 (the top of the air inlet pipe 10 is located inside the agricultural facility 1); the part of the air inlet pipe 10 exposed above the soil has multiple air inlets 12 arranged circumferentially to communicate with the internal space of the agricultural facility; the top of the air inlet pipe 10 is covered with a dust cap 13.

[0075] The lower end of the air inlet pipe 10 extends into the soil and connects with the heat exchange pipe 9, and an air baffle 17 is provided at the connection point (shared with the air baffle 17 in the above embodiment 3). Figure 7The deformable heat insulation plate 14 in this embodiment is the same as the deformable heat insulation plate 14 in Example 3. Thus, in the heat storage state or at night when the fan stops running, the baffle plate 17 is in a naturally drooping state, blocking the upper space inside the heat exchange tube 9 at this end; at this time, the airflow in the heat exchange tube 9 can only flow through the lower space of the heat exchange tube 9; in the heating state, the hot air in the upper space inside the heat exchange tube 9 can push the baffle plate 17 outward.

[0076] like Figure 6 and Figure 7 As shown, multiple heat-conducting water collection pipes 18 connected to the soil are arranged along the length of the bottom of the heat exchange tube 9; the heat-conducting water collection pipes 18 are larger at the top and smaller at the bottom, with the tip pointing downwards and connected to the soil (i.e., the lower end is not closed), and the upper end is connected to the internal space of the heat exchange tube 9.

[0077] The exhaust pipe 15 is a cylindrical pipe that is wider at the bottom than at the top, which can create a chimney effect and facilitate air circulation. The upper end of the exhaust pipe 15 extends out of the soil inside the agricultural facility 1 (the exhaust port 16 at the top of the exhaust pipe 15 is located inside the agricultural facility 1); the lower end extends into the soil and connects with the heat exchange pipe 9. The height of the exhaust pipe 15 is greater than the height of the intake pipe 10.

[0078] Both the outlet pipe 15 and the inlet pipe 10 are equipped with rotatable air caps 11 at a certain position above the soil. During the operation of the fan 4, the rotatable air caps 11 are closed, sealing the outlet pipe 15 and the inlet pipe 10. After the fan 4 stops operating, the rotatable air caps 11 are opened, that is, the connection between the heat exchange tube 9 and the outlet pipe 15 and the inlet pipe 10 is opened, forming a closed heat circulation system.

[0079] Under conditions without sunlight (such as on cloudy days or at night), the fan 4 stops operating, and the baffle plate 17 hangs down naturally, blocking the upper space of the heat exchange tube 9. When the rotatable air caps 11 inside the air inlet pipe 10 and the air outlet pipe 15 are opened, the lower space of the air inlet pipe 10, the heat exchange pipe 9, and the air outlet pipe 15 form an air circulation module. When the air temperature inside the agricultural facility 1 is lower than the soil temperature, the high-temperature air inside the heat exchange pipe 9 is spontaneously discharged from the air outlet 16 of the air outlet pipe 15 under the chimney effect formed by the air outlet pipe 15 and enters the air in the agricultural facility 1. At the same time, the humid and cold air inside the agricultural facility 1 enters the air inlet pipe 10 through the air inlet 12 on the air inlet pipe 10. As the humid and cold air flows through the lower space of the heat exchange pipe 9, it exchanges heat with the soil in the heat storage layer 7. During this process, the water vapor in the air condenses into liquid water on the heat-conducting water collection pipe 18 in the lower half of the heat exchange pipe 9. The water droplets enter the soil in the heat storage layer 7 from the lower outlet of the heat-conducting water collection pipe 18, achieving dehumidification. At the same time, it increases the humidity of the soil in the heat storage layer 7, enhancing the soil heat storage effect.

[0080] Therefore, the solar soil storage and heating system for agricultural facilities of the present invention can collect and concentrate sunlight through a solar concentrating module 3 located on the south side of the agricultural facility 1, and cause the circulating medium air flowing through it to achieve a stepped temperature rise. Driven by a fan 4, the heat transport module delivers the heat energy to the soil (soil storage layer 7 or soil supply layer 8) inside the agricultural facility 1. During this process, heat exchange is carried out between the heat exchange pipe 9 and the soil, and the system is regulated according to the heat energy demand of the crops inside the agricultural facility 1. Under conditions of no sunlight, the closed-loop heat circulation system effectively extracts the heat energy stored in the soil to supplement the air inside the agricultural facility 1 by utilizing the chimney effect. At the same time, the humid air inside the agricultural facility 1 is condensed and water is collected by the heat-conducting water collection pipe 18 on the heat exchange pipe 9. The water enters the soil storage layer and effectively enhances heat transfer.

[0081] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An agricultural facility solar soil storage and heating system, characterized in that, include: Solar concentrating collector modules and heat transport modules; The solar concentrating and heat collection module is arranged outside the agricultural facility to collect and concentrate sunlight and heat the circulating medium air flowing through it, so as to provide hot air to the heat transport module. The heat transport module includes: a heat supply pipe, a heat exchange pipe, and a fan; The heat exchange tube is located in the soil within the agricultural facility, and its two ends are connected to the corresponding solar concentrating and collecting modules via heat delivery tubes; a fan is installed on one end of the heat delivery tube. The heat exchange tube is fitted with a deformable heat insulation plate; the deformable heat insulation plate divides the interior of the heat exchange tube into upper and lower spaces, and the deformable heat insulation plate allows hot air transported from the solar concentrating heat collection module to flow through its upper or lower space by changing its position or its position and shape. Inside the agricultural facility, the soil above the heat exchange pipes is the heating layer soil, and the soil below the heat exchange pipes is the heat storage layer soil. By switching between the blower's blower and induced draft modes, the air inlet direction of the heat exchange tube is changed, and the position or shape of the deformable heat insulation plate is changed by the airflow within the heat exchange tube. The deformable heat insulation plate is foldable along the width direction. One end of the plate is fixed at the horizontal diameter position of the heat exchange tube, and the other end slides in cooperation with the arc-shaped slide rail set on the end contour of the heat exchange tube via a slider. There are two arc-shaped slide rails, symmetrically arranged on the left and right, and located in the middle part of the end profile of the heat exchange tube; the deformable heat insulation plate is slidably engaged with the corresponding arc-shaped slide rail on the left and right sides by sliders; the upper end of the arc-shaped slide rail is provided with an upper limit position, and the lower end is provided with a lower limit position; the upper limit position is located above the horizontal diameter of the heat exchange tube end, and the lower limit position is located below the horizontal diameter of the heat exchange tube end. At the end of the heat exchange tube where the arc-shaped slide rail is located, there is a baffle plate. The upper end of the baffle plate is connected to the heat exchange tube, and the lower end is a movable end. When hot air enters the heat exchange tube from the end where the baffle plate is located, the baffle plate is in a naturally drooping state and blocks the upper space of the heat exchange tube at that end. When hot air enters the heat exchange tube from the end where the baffle plate is not located, it can push the baffle plate outward.

2. The agricultural facility solar soil storage and heating system according to claim 1, characterized in that: The deformable heat insulation panel is made of an elastic material and can deform under airflow disturbance: When the air flow rate in the upper space of the heat exchange tube is large, the deformable heat insulation plate bends downward inside the heat exchange tube; when the air flow rate in the lower space of the heat exchange tube is large, the deformable heat insulation plate bends upward inside the heat exchange tube.

3. The agricultural facility solar soil storage and heating system according to claim 1, characterized in that: It also includes a dehumidification module; The dehumidification module includes: an air inlet pipe, an air outlet pipe, and a heat exchange pipe shared with the heat transport module; the upper end of the air inlet pipe extends out of the soil inside the agricultural facility; the part of the air inlet pipe exposed above the soil has multiple air inlets that communicate with the internal space of the agricultural facility along the circumferential direction. The lower end of the air inlet pipe extends into the soil and connects with the heat exchange pipe, and an air baffle is provided at the connection point; when in the heat storage state or when the fan stops running, the air baffle is in a natural downward state, blocking the upper space inside the heat exchange pipe at that end; when in the heating state, the hot air in the upper space inside the heat exchange pipe can push the air baffle outward. The bottom of the heat exchange tube has multiple heat-conducting water collection tubes that communicate with the soil along its length. The exhaust pipe is a cylindrical pipe that is smaller at the top and larger at the bottom, which can create a chimney effect; the upper end of the exhaust pipe extends out of the soil inside the agricultural facility; the lower end extends into the soil and connects with the heat exchange pipe; the height of the exhaust pipe is greater than the height of the intake pipe. Rotatable air caps are provided in the air outlet pipe and the air inlet pipe.

4. The agricultural facility solar soil storage and heating system according to any one of claims 1-3, characterized in that: The heat supply pipe is wrapped with insulation material on the outside.

5. The agricultural facility solar soil storage and heating system according to any one of claims 1-3, characterized in that: The solar concentrating heat collection module is composed of multiple composite parabolic concentrating heat collection devices connected in series or / and in parallel.

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