Integrated phase change energy storage, solar heating of livestock sheds

Abstract

The application belongs to the technical field of livestock breeding sheds, and provides a livestock breeding shed integrated with phase change energy storage and solar heating, which comprises a phase change energy storage system, a solar heating system, a soil heat storage system and a heat preservation shed. The solar heating system is connected with the soil heat storage system and is used for transferring heat to the soil heat storage system and the phase change energy storage system. The soil heat storage system is located below the heat preservation shed. The solar heating system is arranged on the top of the heat preservation shed. The livestock breeding shed integrated with phase change energy storage and solar heating integrates the phase change energy storage system, the solar heating system and the soil heat storage system, thereby improving energy utilization efficiency, reducing operation cost, and significantly improving environmental conditions in the livestock breeding shed to provide a more comfortable environment for the growth of animals.

Description

Technical Field

[0001] This invention belongs to the field of livestock breeding shed technology, specifically relating to a livestock shed that integrates phase change energy storage and solar heating. Background Technology

[0002] Livestock sheds are indispensable infrastructure in livestock production, and their design directly affects the animals' growth environment, health, and breeding efficiency. Currently, winter heating in livestock sheds mainly relies on traditional energy sources such as coal, oil, or electricity, which not only has high operating costs but also may cause environmental pollution. With the continuous development of renewable energy technologies, solar energy, as a clean and renewable energy source, is receiving increasing attention for its application in livestock sheds. However, simple solar heating systems suffer from problems such as unstable heating and insufficient energy storage. For example, in winter with low sunlight, the heat collected by solar collectors is limited, making it difficult to meet the all-weather, efficient, and stable heating needs of livestock sheds. To address this issue, some existing technologies combine solar thermal collection with cross-seasonal soil thermal storage. However, in practice, solar thermal collection and soil thermal storage are independent components with low synergy, resulting in low efficiency and significant heat loss when heating independently.

[0003] Phase change energy storage technology, as a highly efficient solution for thermal energy storage and conversion, can absorb or release large amounts of thermal energy within a specific temperature range. This characteristic allows it to efficiently store thermal energy when solar energy is abundant and stably release it when sunlight is insufficient, thus ensuring a continuous and stable temperature inside the livestock shed. Therefore, developing a livestock shed that can efficiently utilize solar energy and achieve thermal energy storage and stable heating is particularly important. This invention proposes a livestock shed integrating phase change energy storage and solar heating based on the above background. It aims to achieve efficient thermal energy storage and stable release by combining phase change energy storage technology, solar heating technology, and inter-seasonal soil thermal energy storage technology, providing a highly efficient and stable heating solution for livestock sheds. This shed not only improves energy efficiency and reduces operating costs but also reduces environmental pollution, aligning with the concept of sustainable development. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a livestock shed integrating phase change energy storage and solar heating, thereby solving the problems in the prior art. The technical solution adopted by this invention is as follows:

[0005] A livestock shed integrating phase change energy storage and solar heating includes a phase change energy storage system, a solar heating system, a soil thermal storage system, and an insulated shed.

[0006] The solar heating system is connected to the soil thermal storage system and is used to transfer heat to the soil thermal storage system and the phase change energy storage system; the soil thermal storage system is located below the insulated shed; the solar heating system is arranged on the top of the insulated shed.

[0007] The phase change energy storage system includes an insulated box, a solar heat exchange coil, and a soil heat exchange coil. The insulated box is divided into three chambers: a solar heat exchange chamber, a soil heat exchange chamber, and a common heat exchange chamber. The solar heat exchange chamber contains a first phase change energy storage medium and the solar heat exchange coil; the soil heat exchange chamber contains a third phase change energy storage medium and a soil heat exchange coil; and the common heat exchange chamber contains a second phase change energy storage medium. The solar heat exchange coil is connected to the solar heating system, and the soil heat exchange coil is connected to the soil heat storage system.

[0008] A conversion mechanism is provided in the common heat exchange chamber. The conversion mechanism is used to connect or separate the three chambers, so that the first phase change energy storage medium, the second phase change energy storage medium and the third phase change energy storage medium can be in contact for heat conduction or separated.

[0009] Furthermore, the phase change energy storage system also includes an insulated water tank, a first insulated water tank heat exchange coil, a second insulated water tank heat exchange coil, and an intermediate heat exchange coil.

[0010] The first insulated water tank heat exchange coil is connected to the first inlet pipe and the first return pipe at both ends, and the first inlet pipe and the first return pipe are respectively connected to the insulated water tank; the first insulated water tank heat exchange coil is located in the solar heat exchange chamber;

[0011] The two ends of the heat exchange coil of the second insulated water tank are respectively connected to the second inlet pipe and the second return pipe, and the second inlet pipe and the second return pipe are respectively connected to the insulated water tank; the heat exchange coil of the second insulated water tank is located in the soil heat exchange chamber.

[0012] The two ends of the intermediate heat exchange coil are respectively connected to the third inlet pipe and the third return pipe, which are respectively connected to the insulated water tank; the intermediate heat exchange coil is located in the common heat exchange chamber.

[0013] Furthermore, the solar heating system includes a solar collector, which is installed on the top of the insulated shed. The inlet and outlet of the solar collector are connected to the two ends of the solar heat exchange coil through the inlet pipe and return pipe, respectively.

[0014] The soil heat storage system includes an insulated foundation pit, a connecting pipe, and a soil heat storage pipe; the insulated foundation pit is filled with backfill soil and the soil heat storage pipe, the soil heat storage pipe is connected to the connecting pipe, and the two ends of the connecting pipe are respectively connected to the two ends of the soil heat exchange coil through a soil heat storage inlet pipe and a soil heat storage return pipe.

[0015] The collector inlet pipe is provided with and connected to both ends of a second three-way valve, and the third end of the second three-way valve is connected to the soil heat storage inlet pipe; the collector return pipe is provided with and connected to both ends of a third three-way valve, and the third end of the third three-way valve is connected to the soil heat storage return pipe.

[0016] By switching the second three-way valve and the third three-way valve, the solar collector and the soil heat storage pipe are made to form a circulating flow.

[0017] Furthermore, from bottom to top, a heat insulation layer, a floor heating layer, and a heat-insulating brick layer are sequentially provided above the backfill soil;

[0018] The underfloor heating layer is provided with a flow channel, one end of which is connected to the underfloor heating inlet pipe and the other end of which is connected to the underfloor heating return pipe; a first diversion valve is provided and connected to the soil heat storage inlet pipe, and the third end of the first diversion valve is connected to the underfloor heating inlet pipe; a second diversion valve is provided and connected to the soil heat storage return pipe, and the third end of the second diversion valve is connected to the underfloor heating return pipe.

[0019] Furthermore, a feed trough is provided on the insulating brick layer, and a fence and insulation mechanism are provided on the side of the feed trough. The fence and insulation mechanism are connected to the soil heat storage system and are used to heat the feed trough.

[0020] Furthermore, the fence and insulation mechanism include fence uprights, heat-conducting rods, and heat-transferring sleeves;

[0021] The fence posts are vertically installed and have a hollow structure. The heat-conducting rod is slidably installed inside the fence posts. The heat-transfer sleeve is fixedly connected to the bottom of the insulation layer. The heat-transfer sleeve is adapted to the heat-conducting rod. The heat-transfer sleeve is located inside the backfill soil. The heat-conducting rod is used to slide into the heat-transfer sleeve and transfer part of the heat from the backfill soil to the feed trough.

[0022] Furthermore, the bottom of the feed trough is fixedly connected to an insulating shell, and the insulating shell contains a heat-conducting filler and a hollow tube. The heat-conducting filler is located outside the hollow tube. The top and bottom of the hollow tube are fixedly connected to the insulating shell, and the top and bottom of the insulating shell are respectively provided with guide holes communicating with the hollow tube. The insulation layer, the underfloor heating layer, and the insulation brick layer are provided with coaxial through holes communicating with the guide holes. The hollow tube is coaxially arranged with the heat-conducting rod. The bottom of the fence vertical bar is fixedly connected to the insulating shell.

[0023] A waterproof plate is installed inside the feed trough, and a heat-conducting plate is installed at the bottom of the waterproof plate. A heat-conducting column is fixedly connected to the bottom of the heat-conducting plate. The heat-conducting column passes through the bottom of the feed trough and the top of the insulation shell, and the bottom of the heat-conducting column is inserted into the heat-conducting filler.

[0024] Furthermore, a hollow base is fixedly installed inside the insulation box, with solar heat exchange chambers and soil heat exchange chambers on both sides of the hollow base, and a common heat exchange chamber inside the hollow base; the conversion mechanism includes an inner cylinder, heat insulation packing, an outer cylinder, a motor, a base plate, and a medium flow pipe;

[0025] The outer cylinder is rotatably disposed inside the hollow seat. The outer cylinder is sleeved on the inner cylinder. The heat insulation filler is disposed between the outer cylinder and the inner cylinder. The bottom of the outer cylinder and the inner cylinder is fixedly connected to the base plate. The base plate is connected to the motor shaft.

[0026] The hollow base has openings on both sides that connect the solar heat exchange chamber and the soil heat exchange chamber. A medium flow pipe adapted to the opening is fixedly connected to the outer cylinder. The medium flow pipe passes through the outer cylinder, the heat insulation filler and the inner cylinder. The second phase change energy storage medium is disposed in the inner cylinder.

[0027] The motor is used to drive the base plate to rotate, so that the medium flow pipe connects to the opening or the outer cylinder covers the opening.

[0028] Furthermore, both the solar heat exchange chamber and the soil heat exchange chamber are equipped with elastic pressure components at their tops. The elastic pressure components include a spring and a pressure plate. The spring is located above the pressure plate, and the bottom of the pressure plate abuts against the first phase change energy storage medium and the third phase change energy storage medium.

[0029] This invention has the following beneficial effects: Through the interaction of a phase change energy storage system, a solar heating system, and a soil thermal storage system, it achieves stable storage, efficient release, and flexible utilization of thermal energy. In low-temperature weather, especially in winter, when the solar heating system collects limited heat, the soil thermal storage system can supplement the heat energy, ensuring stable temperature inside the shed. In summer, when temperatures are high and the demand for hot water in the shed is low, the solar heating system can transfer excess heat to the soil thermal storage system for storage in winter. This invention uses phase change energy storage technology, which can absorb or release a large amount of heat during the phase change process, thereby achieving efficient storage and release of thermal energy. This invention provides a livestock shed integrating phase change energy storage and solar heating, which not only improves energy utilization efficiency and reduces operating costs but also significantly improves the environmental conditions inside the livestock shed, providing a more comfortable environment for animal growth. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of a phase change energy storage system;

[0032] Figure 3 This is a top view schematic diagram of a phase change energy storage system;

[0033] Figure 4 This is a schematic diagram showing the opening and the medium flow pipe being misaligned.

[0034] Figure 5 This is a top view diagram showing the opening and the medium flow pipe being staggered.

[0035] Figure 6 yes Figure 1 Enlarged view of point A in the middle;

[0036] Figure 7 This is a partial schematic diagram when the heat-conducting rod is in its lowest position;

[0037] Figure 8 This is a plan view of the fence and insulation mechanism;

[0038] In the diagram: 1. Ground; 2. Solar collector; 3. Insulated shed; 4. Feed trough; 5. Fence and insulation mechanism; 6. Insulated brick layer; 7. Underfloor heating layer; 8. Insulation layer; 9. Backfill soil; 10. Soil heat storage pipe; 11. Connecting pipe; 12. Insulated foundation pit; 13. Water tank; 201. Collector inlet pipe; 202. Collector return pipe; 701. Underfloor heating inlet pipe; 702. Underfloor heating return pipe; 131. First water supply pipe; 132. Second water supply pipe; 141. Third return pipe; 142. Second inlet pipe; 143. Second return pipe; 144. First inlet pipe; 145. First return pipe; 146. First insulated water tank heat exchange coil; 151. Solar heat exchange coil; 152. Second insulated water tank heat exchange coil; 153. Soil heat exchange coil; 154. Intermediate heat exchange coil. 155; Hollow seat; 156; Inner cylinder; 157; Thermal insulation filler; 158; Outer cylinder; 159; Medium flow pipe; 160; First phase change energy storage medium; 161; Second phase change energy storage medium; 162; Third phase change energy storage medium; 163; Motor; 164; Opening; 165; Spring; 166; Pressure plate; 167; Base plate; 168; Feeding pipe; 169; Cover plate; 501; Heat-conducting rod; 502; Fence vertical bar; 503; Insulation shell; 504; Heat-conducting filler; 505; Hollow tube; 506; Heat-conducting column; 507; Heat-conducting plate; 508; Sealing ring; 509; Waterproof plate; 510; Crossbar; 511; Heat transfer jacket; 512; First three-way valve; 01; Second three-way valve; 02; Third three-way valve; 03; Fourth three-way valve; 04; First diverter valve; 05; Second diverter valve; 06. Detailed Implementation

[0039] The following will be based on embodiments of the present invention. Figures 1-8 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0040] It should be noted that, for ease of description, the term "connection" in this invention refers to a connection formed through pipes. This connection method is based on existing technology, such as using pipe connectors, quick couplings, flanges, or other connecting components, or using welding, threaded connections, or other methods to achieve a fixed connection. For example, "the two ends of the first insulated water tank heat exchange coil 151 are respectively connected to the first inlet pipe 145 and the first return pipe 146" means that the two ends of the first insulated water tank heat exchange coil 151 are fixedly connected to the ends of the first inlet pipe 145 and the first return pipe 146, and the connection between the first insulated water tank heat exchange coil 151 and the first inlet pipe 145 and the first return pipe 146 allows the medium to flow within it. The "connection" of other pipes and components refers to this type of connection and will not be elaborated further.

[0041] like Figure 1A livestock shed integrating phase change energy storage and solar heating includes a phase change energy storage system, a solar heating system, a soil heat storage system, and an insulated shed 3;

[0042] The solar heating system is connected to the soil thermal storage system and is used to transfer heat to the soil thermal storage system and the phase change energy storage system; the soil thermal storage system is located below the insulated shed 3; the solar heating system is arranged on the top of the insulated shed 3.

[0043] The phase change energy storage system includes an insulated box, a solar heat exchange coil 152, and a soil heat exchange coil 154. The insulated box is divided into three chambers: a solar heat exchange chamber, a soil heat exchange chamber, and a common heat exchange chamber. The solar heat exchange chamber contains a first phase change energy storage medium 161 and the solar heat exchange coil 152. The soil heat exchange chamber contains a third phase change energy storage medium 163 and the soil heat exchange coil 154. The common heat exchange chamber contains a second phase change energy storage medium 162. The solar heat exchange coil 152 is connected to the solar heating system, and the soil heat exchange coil 154 is connected to the soil heat storage system.

[0044] A conversion mechanism is provided in the common heat exchange chamber. The conversion mechanism is used to connect or separate the three chambers, so that the first phase change energy storage medium 161, the second phase change energy storage medium 162 and the third phase change energy storage medium 163 can be in contact for heat conduction or separated.

[0045] The insulated shed 3, located above the soil heat storage system, effectively maintains the heat of the soil heat storage system. The exterior walls of the insulated shed 3 are preferably insulated walls. The phase change energy storage system of this invention is arranged outside the insulated shed 3. The insulated box is fixed to the ground 1 by a bracket, and a waterproof layer and an insulation layer are provided on the outside of the insulated box. The insulated box is arranged horizontally, with a solar heat exchange chamber, a common heat exchange chamber, and a soil heat exchange chamber arranged sequentially in the transverse direction. The first phase change energy storage medium 161, the second phase change energy storage medium 162, and the third phase change energy storage medium 163 are existing technologies and can be any one or more combinations of water, paraffin, fatty acids, and salt hydrates. Different phase change energy storage media have different phase change temperatures to adapt to the heat storage and release requirements under different ambient temperatures. Both the solar heat exchange coil 152 and the soil heat exchange coil 154 have a spiral structure to increase the heat exchange area and improve heat exchange efficiency. The first phase change energy storage medium 161 covers the solar heat exchange coil 152 and the first insulated water tank heat exchange coil 151; the second phase change energy storage medium 162 covers the intermediate heat exchange coil 155; and the third phase change energy storage medium 163 covers the second insulated water tank heat exchange coil 153 and the soil heat exchange coil 154.

[0046] During operation, the solar collector 2 absorbs solar energy and converts it into heat energy, heating the liquid medium inside the collector. The liquid medium circulates through the collector inlet pipe 201, the solar heat exchange coil 152, and the collector return pipe 202, transferring heat energy to the solar heat exchange coil 152, which in turn heats the first phase change energy storage medium 161. When solar energy is abundant, the first phase change energy storage medium 161 reaches the phase change temperature and undergoes a phase change, storing a large amount of heat energy.

[0047] This invention includes the following operating methods:

[0048] During summer or hot weather with ample sunshine, the solar heating system transfers some heat to the soil thermal storage system and another portion to the phase change energy storage system. The heat in the phase change energy storage system can be directly exchanged for the daily hot water needs of the insulated shed, while the heat in the soil thermal storage system is used for inter-seasonal storage. At this time, the three chambers are disconnected by the action of the conversion mechanism, thus separating the first phase change energy storage medium 161, the second phase change energy storage medium 162, and the third phase change energy storage medium 163. The solar heating system transfers heat to the first phase change energy storage medium 161, which can prevent heat loss to the second phase change energy storage medium 162, the third phase change energy storage medium 163, and the corresponding coils.

[0049] In winter or during cold weather, when there is insufficient sunlight, the solar heating system transfers a small amount of heat to the phase change energy storage system. The heat stored across seasons by the soil thermal storage system is also transferred to the phase change energy storage system. That is, the first phase change energy storage medium 161 and the third phase change energy storage medium 163 are heated. At this time, through the action of the conversion mechanism, the three chambers are connected, and the first phase change energy storage medium 161, the second phase change energy storage medium 162, and the third phase change energy storage medium 163 are in contact and conduct heat. Therefore, the heat source in the phase change energy storage system at this time is the solar heat from the solar heating system and the heat stored across seasons by the soil thermal storage system, which can fully transfer heat to the phase change energy storage system. The heat in the phase change energy storage system is directly exchanged to meet the daily hot water needs of the insulated shed.

[0050] This invention achieves stable storage, efficient release, and flexible use of thermal energy through the interaction of a phase change energy storage system, a solar heating system, and a soil thermal storage system. In low-temperature weather, especially in winter, when the solar heating system collects limited heat, the soil thermal storage system can supplement the heat, ensuring a stable temperature inside the shed. In summer, when temperatures are high and the demand for hot water in the shed is low, the solar heating system can transfer excess heat to the soil thermal storage system for storage in winter. This invention uses phase change energy storage technology, which can absorb or release a large amount of heat during the phase change process, thereby achieving efficient storage and release of thermal energy. This invention provides a livestock shed integrating phase change energy storage and solar heating, combining a phase change energy storage system, a solar heating system, and a soil thermal storage system. This not only improves energy utilization efficiency and reduces operating costs but also significantly improves the environmental conditions inside the livestock shed, providing a more comfortable environment for animal growth.

[0051] like Figures 2-5 The phase change energy storage system also includes an insulated water tank 14, a first insulated water tank heat exchange coil 151, a second insulated water tank heat exchange coil 153, and an intermediate heat exchange coil 155.

[0052] The first heat exchange coil 151 of the first insulated water tank is connected to the first inlet pipe 145 and the first return pipe 146 at both ends, and the first inlet pipe 145 and the first return pipe 146 are respectively connected to the insulated water tank 14; the first heat exchange coil 151 of the first insulated water tank is located in the solar heat exchange chamber.

[0053] The two ends of the second insulated water tank heat exchange coil 153 are respectively connected to the second inlet pipe 143 and the second return pipe 144, and the second inlet pipe 143 and the second return pipe 144 are respectively connected to the insulated water tank 14; the second insulated water tank heat exchange coil 153 is located in the soil heat exchange chamber.

[0054] The two ends of the intermediate heat exchange coil 155 are respectively connected to the third water inlet pipe 141 and the third water return pipe 142, and the third water inlet pipe 141 and the third water return pipe 142 are respectively connected to the insulated water tank 14; the intermediate heat exchange coil 155 is located in the common heat exchange chamber.

[0055] Specifically, the ends of the solar heat exchange coil 152, the soil heat exchange coil 154, the intermediate heat exchange coil 155, the first insulated water tank heat exchange coil 151, the second insulated water tank heat exchange coil 153, and the intermediate heat exchange coil 155 all extend out of the insulation box for connection. The first inlet pipe 145, the second inlet pipe 143, the third inlet pipe 141, the soil heat storage inlet pipe 111, the collector inlet pipe 201, and the underfloor heating inlet pipe 701 are all equipped with corresponding pumps and valves to facilitate the flow of liquid media.

[0056] The first insulated water tank heat exchange coil 151 and the solar heat exchange coil 152 are located together in the solar heat exchange chamber and are covered by the first phase change energy storage medium 161; the second insulated water tank heat exchange coil 153 and the soil heat exchange coil 154 are located together in the soil heat exchange chamber and are covered by the third phase change energy storage medium 163; the intermediate heat exchange coil 155 is located in the common heat exchange chamber and is covered by the second phase change energy storage medium 162.

[0057] The solar heat exchange coil 152 transfers the heat from the solar collector 2 to the first phase change energy storage medium 161, and then transfers the heat through the first phase change energy storage medium 161 to the first insulated water tank heat exchange coil 151. The first insulated water tank heat exchange coil 151 circulates water in the insulated water tank 14 through the first inlet pipe 145 and the first return pipe 146, thereby transferring the heat to the water in the insulated water tank 14.

[0058] The soil heat exchange coil 154 transfers soil heat to the third phase change energy storage medium 163, and then transfers the heat to the second insulated water tank heat exchange coil 153 through the third phase change energy storage medium 163. The second insulated water tank heat exchange coil 153 circulates water in the insulated water tank 14 through the second inlet pipe 143 and the second return pipe 144, thereby transferring heat to the water in the insulated water tank 14.

[0059] When the solar heating system and the soil thermal storage system work together, the heat from the first phase change energy storage medium 161 and the third phase change energy storage medium 163 is transferred to the second phase change energy storage medium 162. The second phase change energy storage medium 162 then transfers the heat to the intermediate heat exchange coil 155. The intermediate heat exchange coil 155 circulates water in the insulated water tank 14 through the third inlet water pipe 141 and the third return water pipe 142, thereby transferring the heat to the water in the insulated water tank 14.

[0060] The water in the insulated water tank 14 is domestic water, which can be directly used for daily use in the insulated shed 3 after being heated, such as hot water for animal feeding, cleaning, and heating feed.

[0061] Furthermore, the solar heating system includes a solar collector 2, which is installed on the top of the insulated shed 3. The inlet and outlet of the solar collector 2 are connected to the two ends of the solar heat exchange coil 152 through the collector inlet pipe 201 and the collector return pipe 202, respectively.

[0062] The soil heat storage system includes an insulated foundation pit 12, a connecting pipe 11, and a soil heat storage pipe 10; the insulated foundation pit 12 is filled with backfill soil 9 and the soil heat storage pipe 10, the soil heat storage pipe 10 is connected to the connecting pipe 11, and the two ends of the connecting pipe 11 are connected to the two ends of the soil heat exchange coil 154 through a soil heat storage inlet pipe 111 and a soil heat storage return pipe 112, respectively.

[0063] The collector inlet pipe 201 is provided with and connected to both ends of the second three-way valve 02, and the third end of the second three-way valve 02 is connected to the soil heat storage inlet pipe 111; the collector return pipe 202 is provided with and connected to both ends of the third three-way valve 03, and the third end of the third three-way valve 03 is connected to the soil heat storage return pipe 112.

[0064] By switching the second three-way valve 02 and the third three-way valve 03, the solar collector 2 and the soil heat storage pipe 10 form a circulating flow.

[0065] The solar collector 2 is an existing technology that transfers heat through the circulation of a liquid medium. The liquid medium is located in the collector inlet pipe 201, the collector return pipe 202, and the solar heat exchange coil 152. After the solar collector 2 is heated and collects heat, it forms a high-temperature liquid medium. The high-temperature liquid medium enters one end of the solar heat exchange coil 152 through the collector return pipe 202, and then exits from the other end of the solar heat exchange coil 152 back to the collector inlet pipe 201. Finally, it enters the solar collector 2 through the collector inlet pipe 201 to continue circulating.

[0066] The soil heat storage pipe 10 is existing technology and can be constructed as a coil. Multiple soil heat storage pipes 10 can be installed and connected in parallel to the connecting pipe 11. A liquid medium is placed inside the soil heat storage pipe 10, the connecting pipe 11, the soil heat storage inlet pipe 111, the soil heat storage return pipe 112, and the soil heat exchange coil 154. The soil heat storage pipe 10 outputs the liquid medium to the soil heat storage return pipe 112 through the connecting pipe 11. The soil heat storage return pipe 112 outputs the liquid medium to one end of the soil heat exchange coil 154, and the other end of the soil heat exchange coil 154 inputs the liquid medium into the connecting pipe 11 through the soil heat storage inlet pipe 111, forming a liquid medium circulation flow that transfers heat to the soil heat exchange coil 154.

[0067] The insulated foundation pit 12 is pre-constructed, and an insulation layer is poured into the pit. Then, the insulated foundation pit 12 is backfilled with improved backfill soil 9, which is a mixture of original soil (excavated soil) with sand, gravel, and thermally conductive additives (such as metal scraps and graphite powder) in a specific ratio to optimize thermal conductivity and porosity. The soil heat storage pipe 10 is buried within the backfill soil 9.

[0068] In addition, the present invention is also provided with a water tank 13, a first water pipe 131, a second water pipe 132, a first three-way valve 01 and a fourth three-way valve 04; the water tank 13 is provided with a heat exchange liquid medium, such as pure water.

[0069] A first three-way valve 01 is installed and connected to the soil heat storage water inlet pipe 111. The first three-way valve 01 isolates the soil heat storage water inlet pipe 111. Both ends of the first three-way valve 01 are fixedly connected to the isolated part of the soil heat storage water inlet pipe 111. The third end of the first three-way valve 01 is connected to the first water supply pipe 131. The first water supply pipe 131 is connected to the water supply tank 13.

[0070] A fourth three-way valve 04 is installed and connected to the collector inlet pipe 201. The fourth three-way valve 04 isolates the collector inlet pipe 201. Both ends of the fourth three-way valve 04 are fixedly connected to the isolated part of the collector inlet pipe 201. The third end of the fourth three-way valve 04 is connected to the second water supply pipe 132, which is connected to the water supply tank 13. Both the first water supply pipe 131 and the second water supply pipe 132 are equipped with pump bodies and valves to output water from the water supply tank 13 to the soil heat storage inlet pipe 111 and the collector inlet pipe 201, thereby supplementing and adding liquid media.

[0071] The second three-way valve 02 isolates the collector inlet pipe 201. Both ends of the second three-way valve 02 are fixedly connected to the part of the collector inlet pipe 201 that is isolated. The third end of the second three-way valve 02 is connected to the soil heat storage inlet pipe 111. A first shut-off valve is installed on the soil heat storage inlet pipe 111, which is located between the third end of the second three-way valve 02 and the soil heat exchange coil 154.

[0072] The third three-way valve 03 isolates the collector return water pipe 202. Both ends of the third three-way valve 03 are fixedly connected to the isolated part of the collector return water pipe 202. The third end of the third three-way valve 03 is connected to the soil heat storage return water pipe 112. A second shut-off valve is installed on the soil heat storage return water pipe 112. The second shut-off valve is located between the third end of the third three-way valve 03 and the soil heat exchange coil 154.

[0073] Furthermore, from bottom to top, a heat insulation layer 8, a floor heating layer 7, and a heat-insulating brick layer 6 are sequentially arranged above the backfill soil 9;

[0074] The underfloor heating layer 7 is provided with a flow channel, one end of which is connected to the underfloor heating inlet pipe 701, and the other end of which is connected to the underfloor heating return pipe 702; a first diversion valve 05 is provided and connected to the soil heat storage inlet pipe 111, and the third end of the first diversion valve 05 is connected to the underfloor heating inlet pipe 701; a second diversion valve 06 is provided and connected to the soil heat storage return pipe 112, and the third end of the second diversion valve 06 is connected to the underfloor heating return pipe 702.

[0075] The insulation layer 8 is preferably made of high-efficiency insulation materials such as polystyrene foam board or rock wool board. It is placed above the backfill soil 9 to isolate heat transfer between the backfill soil 9 and the underfloor heating layer 7, reduce heat loss, and improve the insulation effect. The thickness and density of the insulation layer 8 can be adjusted according to actual needs to achieve the best insulation effect. The underfloor heating layer 7 has coiled flow channels inside, or coiled pipes can be directly installed inside the underfloor heating layer 7. The function of the underfloor heating layer 7 is to heat the insulation brick layer 6 to achieve the purpose of underfloor heating. The first diversion valve 05 and the second diversion valve 06 are existing technologies. Their purpose is to divert a portion of the liquid medium from the soil heat storage inlet pipe 111 and the soil heat storage return pipe 112, thereby directly using a portion of the heat from the soil heat storage system for underfloor heating, reducing the heat transfer process, improving heat utilization efficiency, and providing a comfortable environment for animals.

[0076] The specific heat exchange process of this invention is as follows:

[0077] 1. In summer or during hot weather, the temperature collected by solar collector 2 is higher than the temperature of backfill soil 9. Solar collector 2 collects heat to form a high-temperature liquid medium. This high-temperature liquid medium enters one end of the solar heat exchange coil 152 through the collector return water pipe 202, and then exits from the other end of the solar heat exchange coil 152 to the collector inlet water pipe 201. Finally, it enters the solar collector 2 through the collector inlet water pipe 201 to continue circulating. During this process, the solar heat exchange coil 152 transfers heat to the first phase change energy storage medium 161, and then transfers heat through the first phase change energy storage medium 161 to the first insulated water tank heat exchange coil 151. The first insulated water tank heat exchange coil 151 circulates water in the insulated water tank 14 through the first inlet water pipe 145 and the first return water pipe 146, thereby transferring heat to the water in the insulated water tank 14. Users can directly use the hot water in the insulated water tank 14 as needed.

[0078] When the temperature of the first phase change energy storage medium 161 reaches a set threshold, such as 80°C or 100°C, it can be detected by a temperature sensor, and the corresponding valves can be controlled by a PLC program. At the start of the heat storage phase, the second three-way valve 02 connects the collector inlet pipe 201 to the soil heat storage inlet pipe 111, and the third three-way valve 03 connects the collector return pipe 202 to the soil heat storage return pipe 112; the first and second shut-off valves are closed. At this time, the high-temperature liquid medium is output from the solar collector 2 to the collector return water pipe 202. The collector return water pipe 202 outputs the high-temperature liquid medium to the soil heat storage return water pipe 112 through the third three-way valve 03. The soil heat storage return water pipe 112 outputs the high-temperature liquid medium to the connecting pipe 11 and the soil heat storage pipe 10, thereby transferring heat to the backfill soil 9. The low-temperature liquid medium, after losing heat, enters the soil heat storage inlet pipe 111 and enters the collector inlet pipe 201 through the second three-way valve 02. The collector inlet pipe 201 re-inputs the low-temperature liquid medium into the solar collector 2, forming a circulation of the liquid medium between the solar collector 2 and the soil heat storage pipe 10, thereby storing heat. If the temperature collected by the solar collector 2 is lower than the temperature of the backfill soil 9, the heat from the solar collector 2 will not be transferred to the backfill soil 9.

[0079] In this process, the solar heating system operates independently, while the soil heat storage system only stores heat. By connecting the three chambers through the conversion mechanism, the soil heat storage system can directly store heat without the third phase change energy storage medium 163. The heat collected by the solar heating system can also bypass the second phase change energy storage medium 162 and the intermediate heat exchange coil 155, resulting in higher efficiency of centralized heat generation.

[0080] 2. In winter or cold weather, if there is sunshine and the temperature is between 5°C and 25°C, the solar collector 2 collects a small amount of heat and transfers the heat to the first phase change energy storage medium 161; the backfill soil 9 heats the soil heat storage pipe 10, and the soil heat storage pipe 10 outputs liquid medium to the soil heat storage return water pipe 112 through the connecting pipe 11. The soil heat storage return water pipe 112 outputs liquid medium to one end of the soil heat exchange coil 154, and the other end of the soil heat exchange coil 154 inputs liquid medium into the connecting pipe 11 through the soil heat storage inlet water pipe 111, forming a liquid medium circulation flow, which transfers heat to the soil heat exchange coil 154, and the soil heat exchange coil 154 transfers the soil heat to the third phase change energy storage medium 163.

[0081] At this point, the solar heating system and the soil thermal storage system work together, connecting the three chambers through a conversion mechanism. Heat from the first phase change energy storage medium 161 and the third phase change energy storage medium 163 is transferred to the second phase change energy storage medium 162. The second phase change energy storage medium 162 then transfers heat to the intermediate heat exchange coil 155. The intermediate heat exchange coil 155 circulates water within the insulated water tank 14 through the third inlet pipe 141 and the third return pipe 142, thereby transferring heat to the water within the insulated water tank 14. The combined effect of the solar heating system and the soil thermal storage system increases heat output and improves heating efficiency. Furthermore, the solar heating system acts as a preheating system, effectively reducing the heat output of the soil thermal storage system and extending its service life.

[0082] If there is no sunshine in winter, the temperature of the solar collector 2 is much lower than that of the backfill soil 9, for example, the temperature difference between the two is greater than 30°. At this time, the solar collector 2 is abandoned for heat collection, and the soil heat storage system is used for heat supply. The three chambers are separated by a conversion mechanism, so that the heat output by the soil heat storage system only enters the third phase change energy storage medium 163, avoiding the first phase change energy storage medium 161 and the second phase change energy storage medium 162 and the corresponding coils, thus avoiding heat loss.

[0083] When underfloor heating is needed, the first diversion valve 05 and the second diversion valve 06 are used to divert the liquid medium in the soil heat storage pipe 10 through the underfloor heating inlet pipe 701 and the underfloor heating return pipe 702 into the underfloor heating layer 7, thereby directly generating underfloor heating and avoiding heat loss due to multiple transfers.

[0084] like Figures 6-8 A feed trough 4 is provided on the insulating brick layer 6. A fence and an insulation mechanism 5 are provided on the side of the feed trough 4. The fence and the insulation mechanism 5 are connected to the soil heat storage system and are used to heat the feed trough 4.

[0085] Furthermore, the fence and insulation mechanism 5 includes a fence vertical bar 503, a heat-conducting rod 502, and a heat transfer sleeve 512;

[0086] The fence vertical bar 503 is vertically arranged and has a hollow structure. The heat-conducting rod 502 is slidably arranged inside the fence vertical bar 503. The heat-transfer sleeve 512 is fixedly connected to the bottom of the insulation layer 8. The heat-transfer sleeve 512 is adapted to the heat-conducting rod 502. The heat-transfer sleeve 512 is located inside the backfill soil 9. The heat-conducting rod 502 is used to slide into the heat-transfer sleeve 512 and transfer part of the heat of the backfill soil 9 to the feed trough 4.

[0087] Furthermore, the bottom of the feed trough 4 is fixedly connected to an insulation shell 504. The insulation shell 504 contains a heat-conducting filler 505 and a hollow tube 506. The heat-conducting filler 505 is located outside the hollow tube 506. The top and bottom of the hollow tube 506 are fixedly connected to the insulation shell 504. The top and bottom of the insulation shell 504 are respectively provided with guide holes communicating with the hollow tube 506. The insulation layer 8, the underfloor heating layer 7, and the insulation brick layer 6 are provided with coaxial through holes communicating with the guide holes. The hollow tube 506 is coaxially arranged with the heat-conducting rod 502. The bottom of the fence vertical bar 503 is fixedly connected to the insulation shell 504.

[0088] A waterproof plate 510 is provided inside the feed trough 4. A heat-conducting plate 508 is provided at the bottom of the waterproof plate 510. A heat-conducting column 507 is fixedly connected to the bottom of the heat-conducting plate 508. The heat-conducting column 507 passes through the bottom of the feed trough 4 and the top of the heat insulation shell 504. The bottom of the heat-conducting column 507 is inserted into the heat-conducting filler 505.

[0089] Multiple vertical fence posts 503 are arranged side by side, and multiple horizontally arranged crossbars 511 are fixedly connected between two adjacent vertical fence posts 503. The vertical fence posts 503 and the horizontal crossbars 511 together constitute the structure of the fence. The feed trough 4 has an upward opening, and food and feed are placed on top of the waterproof plate 510.

[0090] like Figure 6 When it is not necessary to insulate the feed trough 4, move the heat-conducting rod 502 to its highest position. At this time, the bottom of the heat-conducting rod 502 is above the hollow tube 506. The bottom of the heat-conducting rod 502, the inside of the hollow tube 506, the guide hole, and the through hole are filled with air, which can prevent heat loss from the backfill soil 9.

[0091] like Figure 7 When it is necessary to insulate the feed trough 4, the heat-conducting rod 502 is moved to its lowest position. The heat-conducting rod 502 passes through the hollow tube 506, the guide hole, and the through hole, and is in close contact with the hollow tube 506 and the heat transfer sleeve 512. Thermal grease or coatings can be applied to the heat-conducting rod 502 to improve thermal conductivity. The backfill soil 9 heats the heat-conducting rod 502 through the heat transfer sleeve 512, and the heat-conducting rod 502 in turn heats the hollow tube 506. The hollow tube 506 transfers heat to the thermally conductive filler 505, which in turn heats the thermally conductive column 507, the thermally conductive plate 508, and the waterproof plate 510, thus creating an insulation effect for the feed in the feed trough 4.

[0092] This invention uses the heat-conducting rod 502 to directly absorb the heat from the backfill soil 9 to insulate the feed trough 4, which reduces heat loss during the heat transfer process and improves heat utilization efficiency. The integrated structure of the fence vertical bar 503 and the heat-conducting rod 502 also reduces the occupied area, serving both as a fence and a heat-collecting function.

[0093] Additionally, when the heat-conducting rod 502 is at its highest position, its top can be bolted to a cover plate 501 to prevent it from falling. During the downward movement of the heat-conducting rod 502, an operating lever 503 can be threaded onto the top of the heat-conducting rod 502 for easy operation. A T-shaped structure is formed between the waterproof plate 510 and the heat-conducting plate 508, and a sealing ring 509 is nested within to enhance waterproof performance. Inside the insulated shed 3, multiple feed troughs 4, fences, and insulation mechanisms 5 can be arranged side-by-side. The heat-conducting filler 505 can be water, metal powder, graphite powder, or heat-conducting ceramics, etc., to improve heat transfer efficiency.

[0094] like Figures 2-4 The heat preservation box is fixedly equipped with a hollow base 156. The hollow base 156 has a solar heat exchange chamber and a soil heat exchange chamber on both sides, and a common heat exchange chamber inside the hollow base 156. The conversion mechanism includes an inner cylinder 157, heat insulation packing 158, an outer cylinder 159, a motor 164, a base plate 168, and a medium flow pipe 160.

[0095] The outer cylinder 159 is rotatably disposed inside the hollow seat 156. The outer cylinder 159 is sleeved on the inner cylinder 157. The heat insulation filler 158 is disposed between the outer cylinder 159 and the inner cylinder 157. The bottom of the outer cylinder 159 and the inner cylinder 157 is fixedly connected to the bottom plate 168. The bottom plate 168 is connected to the rotating shaft of the motor 164.

[0096] The hollow base 156 has openings 165 on both sides that connect the solar heat exchange chamber and the soil heat exchange chamber. The outer cylinder 159 is fixedly connected to a medium flow pipe 160 that is adapted to the opening 165. The medium flow pipe 160 passes through the outer cylinder 159, the heat insulation filler 158 and the inner cylinder 157. The second phase change energy storage medium 162 is disposed inside the inner cylinder 157.

[0097] The motor 164 is used to drive the base plate 168 to rotate, so that the medium flow pipe 160 connects to the opening 165 or the outer cylinder 159 covers the opening 165.

[0098] The interior of the hollow seat 156 and the interior of the inner cylinder 157 form a common heat exchange chamber. The inner wall surface of the hollow seat 156 is an arc surface and fits the outer wall surface of the outer cylinder 159.

[0099] The motor 164 is preferably located at the bottom of the insulation box. When the motor 164 rotates, the bottom plate 168, the inner cylinder 157, and the outer cylinder 159 rotate simultaneously, causing the medium flow pipe 160 to be misaligned or aligned with the opening 165. When the medium flow pipe 160 is aligned with the opening 165, such as... Figures 2-3The three chambers are interconnected, and the second phase change energy storage medium 162 flows to fill the medium flow pipe 160 and the opening 165, thereby allowing the first phase change energy storage medium 161, the second phase change energy storage medium 162, and the third phase change energy storage medium 163 to come into contact and fuse with each other, forming a whole phase change energy storage medium, which can effectively improve the common heat conduction and heat storage function. Figures 4-5 When the opening 165 is offset from the medium flow pipe 160, the outer cylinder 159 blocks the opening 165, and forms a heat insulation function under the action of the heat insulation filler 158, thereby separating the three chambers.

[0100] The thermal insulation filler 158 can be aerogel, vacuum insulation board or expanded perlite and other high-efficiency thermal insulation materials.

[0101] Furthermore, both the solar heat exchange chamber and the soil heat exchange chamber are provided with elastic pressure components at their tops. The elastic pressure components include a spring 166 and a pressure plate 167. The spring 166 is located above the pressure plate 167, and the bottom of the pressure plate 167 abuts against the first phase change energy storage medium 161 and the third phase change energy storage medium 163.

[0102] The spring 166 is preferably sleeved on a telescopic rod, with the two ends of the telescopic rod fixedly connected to the pressure plate 167 and the top of the insulation box, respectively. The function of the spring 166 and the pressure plate 167 is to generate pressure so that the two pressure plates 167 squeeze the corresponding first phase change energy storage medium 161 and third phase change energy storage medium 163. This can adapt to the volume changes of the first phase change energy storage medium 161 and third phase change energy storage medium 163, and can also adapt to the volume changes of the phase change energy storage medium in the three chambers caused by the material flow during the rotation of the inner cylinder 157 and the outer cylinder 159. At the same time, it can also maintain the close contact of the first phase change energy storage medium 161, second phase change energy storage medium 162, and third phase change energy storage medium 163 when the three chambers are connected.

[0103] In addition, two symmetrical feeding pipes 169 are provided on both sides of the insulation box. The hollow base 156 has channels on both sides that are compatible with the feeding pipes 169. The axes of the two feeding pipes 169 are perpendicular to the axes of the two medium flow pipes 160, and corresponding valves are installed on the feeding pipes 169. When the motor 164 rotates, causing the opening 165 to be offset from the medium flow pipe 160, the medium flow pipe 160 is aligned with the two feeding pipes 169, thereby realizing the addition and discharge of the second phase change energy storage medium 162. When summer is long and the solar heating system and soil heat storage system are not required to work together, the second phase change energy storage medium 162 can be discharged through the feeding pipes 169, and the solar heat exchange chamber and the soil heat exchange chamber are separated by air, further reducing heat loss. Sufficient amounts of the second phase change energy storage medium 162 can also be added through the feeding pipes 169 when needed to fully fill the common heat exchange chamber.

[0104] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A livestock shed integrating phase change energy storage and solar heating, characterized in that, Including phase change energy storage systems, solar heating systems, soil thermal storage systems and insulated sheds (3); The solar heating system is connected to the soil heat storage system and is used to transfer heat to the soil heat storage system and the phase change energy storage system; the soil heat storage system is located below the insulated shed (3); the solar heating system is arranged on the top of the insulated shed (3); The phase change energy storage system includes an insulated box, a solar heat exchange coil (152), and a soil heat exchange coil (154). The insulated box is divided into three chambers: a solar heat exchange chamber, a soil heat exchange chamber, and a common heat exchange chamber. The solar heat exchange chamber contains a first phase change energy storage medium (161) and the solar heat exchange coil (152). The soil heat exchange chamber contains a third phase change energy storage medium (163) and the soil heat exchange coil (154). The common heat exchange chamber contains a second phase change energy storage medium (162). The solar heat exchange coil (152) is connected to the solar heating system, and the soil heat exchange coil (154) is connected to the soil heat storage system. A conversion mechanism is provided in the common heat exchange chamber. The conversion mechanism is used to connect or separate the three chambers so that the first phase change energy storage medium (161), the second phase change energy storage medium (162) and the third phase change energy storage medium (163) can be in contact for heat conduction or separated. The phase change energy storage system also includes an insulated water tank (14), a first insulated water tank heat exchange coil (151), a second insulated water tank heat exchange coil (153), and an intermediate heat exchange coil (155). The first insulated water tank heat exchange coil (151) is connected to the first inlet pipe (145) and the first return pipe (146) at both ends, and the first inlet pipe (145) and the first return pipe (146) are connected to the insulated water tank (14); the first insulated water tank heat exchange coil (151) is located in the solar heat exchange chamber; The two ends of the second insulated water tank heat exchange coil (153) are respectively connected to the second inlet pipe (143) and the second return pipe (144), and the second inlet pipe (143) and the second return pipe (144) are respectively connected to the insulated water tank (14); the second insulated water tank heat exchange coil (153) is located in the soil heat exchange chamber. The two ends of the intermediate heat exchange coil (155) are respectively connected to the third inlet pipe (141) and the third return pipe (142), and the third inlet pipe (141) and the third return pipe (142) are respectively connected to the insulated water tank (14); the intermediate heat exchange coil (155) is located in the common heat exchange chamber; A hollow base (156) is fixedly installed inside the insulation box. The hollow base (156) has a solar heat exchange chamber and a soil heat exchange chamber on both sides, and a common heat exchange chamber inside the hollow base (156). The conversion mechanism includes an inner cylinder (157), heat insulation packing (158), an outer cylinder (159), a motor (164), a base plate (168), and a medium flow pipe (160). The outer cylinder (159) is rotatably disposed inside the hollow seat (156). The outer cylinder (159) is sleeved on the inner cylinder (157). The heat insulation filler (158) is disposed between the outer cylinder (159) and the inner cylinder (157). The bottom plate (168) is fixedly connected to the bottom of the outer cylinder (159) and the inner cylinder (157). The bottom plate (168) is connected to the rotating shaft of the motor (164). The hollow base (156) has openings (165) on both sides that connect the solar heat exchange chamber and the soil heat exchange chamber. A medium flow pipe (160) adapted to the opening (165) is fixedly connected to the outer cylinder (159). The medium flow pipe (160) passes through the outer cylinder (159), the heat insulation filler (158) and the inner cylinder (157). The second phase change energy storage medium (162) is disposed inside the inner cylinder (157). The motor (164) is used to drive the base plate (168) to rotate, so that the medium flow pipe (160) connects to the opening (165) or the outer cylinder (159) covers the opening (165). The solar heating system includes a solar collector (2), which is installed on the top of the insulated shed (3). The inlet and outlet of the solar collector (2) are connected to the two ends of the solar heat exchange coil (152) through the inlet pipe (201) and the return pipe (202) of the collector, respectively. The soil heat storage system includes an insulated foundation pit (12), a connecting pipe (11), and a soil heat storage pipe (10); the insulated foundation pit (12) is filled with backfill soil (9) and the soil heat storage pipe (10), the soil heat storage pipe (10) is connected to the connecting pipe (11), and the two ends of the connecting pipe (11) are connected to the two ends of the soil heat exchange coil (154) through the soil heat storage inlet pipe (111) and the soil heat storage return pipe (112), respectively; The collector inlet pipe (201) is provided with and connected to both ends of a second three-way valve (02), and the third end of the second three-way valve (02) is connected to the soil heat storage inlet pipe (111); the collector return pipe (202) is provided with and connected to both ends of a third three-way valve (03), and the third end of the third three-way valve (03) is connected to the soil heat storage return pipe (112). By switching the second three-way valve (02) and the third three-way valve (03), the solar collector (2) and the soil heat storage pipe (10) form a circulating flow.

2. The livestock shed integrating phase change energy storage and solar heating according to claim 1, characterized in that, The backfill soil (9) is provided with a heat insulation layer (8), a floor heating layer (7) and a heat insulation brick layer (6) from bottom to top. The floor heating layer (7) is provided with a flow channel, one end of which is connected to the floor heating inlet pipe (701), and the other end of which is connected to the floor heating return pipe (702); the soil heat storage inlet pipe (111) is provided with and connected to a first diversion valve (05), and the third end of the first diversion valve (05) is connected to the floor heating inlet pipe (701); the soil heat storage return pipe (112) is provided with and connected to a second diversion valve (06), and the third end of the second diversion valve (06) is connected to the floor heating return pipe (702).

3. The livestock shed integrating phase change energy storage and solar heating according to claim 2, characterized in that, A feed trough (4) is provided on the insulating brick layer (6). A fence and an insulation mechanism (5) are provided on the side of the feed trough (4). The fence and the insulation mechanism (5) are connected to the soil heat storage system and are used to heat the feed trough (4).

4. The livestock shed integrating phase change energy storage and solar heating according to claim 3, characterized in that, The fence and insulation mechanism (5) includes fence vertical bars (503), heat-conducting rods (502) and heat-transfer sleeves (512). The fence vertical bar (503) is set vertically and has a hollow structure. The heat-conducting rod (502) is slidably arranged inside the fence vertical bar (503). The heat insulation layer (8) is fixedly connected to the heat transfer sleeve (512) at the bottom. The heat transfer sleeve (512) is adapted to the heat-conducting rod (502). The heat transfer sleeve (512) is located inside the backfill soil (9). The heat-conducting rod (502) is used to slide into the heat transfer sleeve (512) and transfer part of the heat of the backfill soil (9) to the feed trough (4).

5. A livestock shed integrating phase change energy storage and solar heating according to claim 4, characterized in that, The bottom of the feed trough (4) is fixedly connected to the heat-insulating shell (504). The heat-insulating shell (504) is provided with heat-conducting filler (505) and hollow tube (506). The heat-conducting filler (505) is located outside the hollow tube (506). The top and bottom of the hollow tube (506) are fixedly connected to the heat-insulating shell (504). The top and bottom of the heat-insulating shell (504) are respectively provided with guide holes that communicate with the hollow tube (506). The heat insulation layer (8), the floor heating layer (7) and the heat-insulating brick layer (6) are provided with coaxial through holes that communicate with the guide holes. The hollow tube (506) is coaxially arranged with the heat-conducting rod (502). The bottom of the fence vertical bar (503) is fixedly connected to the heat-insulating shell (504). A waterproof plate (510) is provided inside the feed trough (4). A heat-conducting plate (508) is provided at the bottom of the waterproof plate (510). A heat-conducting column (507) is fixedly connected to the bottom of the heat-conducting plate (508). The heat-conducting column (507) passes through the bottom of the feed trough (4) and the top of the heat-insulating shell (504). The bottom of the heat-conducting column (507) is inserted into the heat-conducting filler (505).

6. A livestock shed integrating phase change energy storage and solar heating according to claim 1, characterized in that, Both the solar heat exchange chamber and the soil heat exchange chamber are provided with elastic pressure components at their tops. The elastic pressure components include a spring (166) and a pressure plate (167). The spring (166) is located above the pressure plate (167), and the bottom of the pressure plate (167) abuts against the first phase change energy storage medium (161) and the third phase change energy storage medium (163).

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