An energy circulation system with double-sided energy storage and heat exchange

Abstract

The present application discloses an energy circulation system with double-sided energy storage and heat exchange, wherein the left and right sides of a ground source heat pump are respectively connected to an energy storage end, wherein any energy storage end includes at least one energy storage underground box, and the other energy storage end includes an energy storage water tank and / or an energy storage underground box, and the energy storage end is respectively connected to the ground source heat pump and an application end through a circulation pipeline, and the underground box includes a box structure and a heat exchange pipe network wall perpendicular to the bottom of the box structure, and a heat exchange pipe network horizontally penetrating the wall is arranged on the wall, and each pipe network is provided with a pair of liquid inlets and outlets, and a circulating pump is arranged at the liquid outlet, and the start and stop of each pump are controlled by a control system, and the pipe network is filled with a liquid circulation medium; when the heat pump is running, the energy storage ends on the left and right sides of the heat pump exchange cold and heat sources, so that one energy storage end accumulates cold energy and the other energy storage end accumulates hot energy, and in addition, the energy storage underground box includes a single-inlet and single-outlet energy storage box or a multi-inlet and multi-outlet energy storage box, and therefore, the type and quantity of energy storage boxes on both sides of the heat pump can be configured according to the actual project application requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and in particular relates to an energy circulation system for double-sided energy storage and heat exchange. Background Art

[0002] In the field of energy storage technology, a heat exchange station for connecting the application end and the energy storage end is often used to realize heat energy transfer and conversion. After searching, the existing Chinese utility model application document with the announcement number CN205579706U discloses a containerized intelligent heat exchange station, "including a heat exchange circulation system, a circulation power system, a water replenishment system, a soft water system and a control system. It highly integrates the heat exchange circulation system, the circulation power system, the water replenishment system, the soft water system, the control system and the heat exchange station box on the rack, which can be containerized for mobile transportation and hoisting. The network control center is a cloud-based background based on cloud computing, and the interconnection between various terminal devices of the containerized intelligent heat exchange station is realized through the cloud-based background". Although the heat exchange station integrates multiple systems and can automatically adjust the heating temperature according to changes in outdoor temperature and time, there are several problems: First, the manufacturing and installation costs are relatively high, which increases the construction cost of the heat exchange station and limits its promotion and application in some areas with relatively poor economic conditions; second, due to its large footprint on the surface, its application is subject to certain restrictions for areas with limited space resources; third, the design of the heat exchange station is closely related to environmental factors and is easily affected by the environment and extreme climate, which can lead to unstable operation or failure, and its energy storage efficiency and heat exchange efficiency are still low. Inefficient energy storage and heat exchange will not only increase energy consumption, but also affect the user's heating experience.

[0003] Therefore, on this basis, how to use geothermal energy to achieve more efficient and environmentally friendly energy storage and transfer release has become a current research hotspot.

[0004] In the existing system that uses ground source heat pumps and water bodies to transport ground source heat energy in the soil to the application end for release, heat is mainly collected and released through underground pipes set vertically in the soil. Generally, the spacing between the buried pipes is about four meters, and the setting depth of the U-shaped buried pipe is about one hundred meters. The pipe is mainly filled with water, so that the soil storage and heat transfer exchange are utilized through water circulation. The heat energy in the underground soil is exchanged in winter, and the cold energy in the underground soil is exchanged in summer, so as to realize energy supply at the application end. However, this traditional underground pipe setting method has obvious limitations. Since each U-shaped pipe can only meet the energy supply of more than 20 square meters, it also requires many main accessories, such as water collectors, water distributors, valves, etc. Therefore, relying only on shallow geothermal energy underground U-shaped pipes to undertake energy storage and heat exchange functions will have problems such as large investment, difficult construction, long cycle, and low heat exchange efficiency.

[0005] After searching, although the Chinese invention application document with the existing publication number CN115540107A discloses a rock energy storage ground source heat pump air-conditioning system and its operation method, "including a multi-operating condition heat pump unit, a rock energy storage system and a user-end air-conditioning system; the multi-operating condition heat pump unit has an air-conditioning heat exchange input port and an air-conditioning heat exchange output port, and each is connected to the output port and input port of the user-end air-conditioning system correspondingly; the rock energy storage system includes one or more boreholes arranged on the underground rock and soil body, and an underground heat exchanger is arranged in the borehole, and a rock energy storage ground source heat pump air-conditioning system operation method is disclosed", however, the system still adopts the traditional ground source heat pump buried pipe setting, so the above-mentioned problems still need to be solved urgently. Utility Model Content

[0006] In order to solve the problems existing in the prior art mentioned above, the purpose of the utility model is to provide an energy circulation system with double-sided energy storage and heat exchange, which has the advantages of low investment, short cycle, high energy storage density, high heat exchange efficiency and small space occupation.

[0007] In order to achieve the above purpose and other related purposes, the utility model adopts the following technical solutions:

[0008] The utility model provides an energy circulation system for double-sided energy storage and heat exchange, comprising a ground source heat pump, an application end, an energy storage end and a control system, wherein the energy storage end is respectively connected to the ground source heat pump and the application end through a circulation pipeline, and the left side and the right side of the ground source heat pump are respectively connected with an energy storage end, the energy storage end located on one side comprises at least one energy storage buried box, and the energy storage end located on the other side comprises an energy storage water tank and / or an energy storage box; the energy storage buried box comprises a box structure and a heat exchange pipe network wall located inside the box structure, and the heat exchange pipe network wall A heat exchange network is vertically arranged on the bottom of the box structure and on the wall of the heat exchange network. The heat exchange network horizontally penetrates the wall of the heat exchange network. Each heat exchange network is provided with a liquid inlet and a liquid outlet. A circulating pump is arranged at the liquid outlet. The start and stop of the ground source heat pump and the start and stop of the circulating pump are controlled by a control system. The heat exchange network is filled with a liquid circulating medium. When the ground source heat pump is running, the cold and heat sources are exchanged between the energy storage ends on the left and right sides of the ground source heat pump, so that the energy storage end on one side accumulates cold energy while the energy storage end on the other side accumulates heat energy.

[0009] As a preferred technical solution, the energy storage buried box includes a single-inlet and single-outlet energy storage box or a multi-inlet and multi-outlet energy storage box. The single-inlet and single-outlet energy storage box is only equipped with a heat exchange pipe network, and the multi-inlet and multi-outlet energy storage box includes no less than two heat exchange pipe networks. The heat exchange pipe networks of the multi-inlet and multi-outlet energy storage box are horizontally layered in the box structure of the multi-inlet and multi-outlet energy storage box.

[0010] As a preferred technical solution, when the energy storage end connected to the ground source heat pump is a single-inlet and single-outlet energy storage box, the buried energy storage box is connected in series with the ground source heat pump through a circulation pump, and the application end is connected to the series pipeline between the single-inlet and single-outlet energy storage box and the ground source heat pump through a water valve.

[0011] As a preferred technical solution, the water valve includes a one-way water stop valve and a reversing valve; the reversing valve is arranged on the inlet pipeline of the ground source heat pump, the outlet end of the reversing valve is connected with the inlet of the ground source heat pump, and the inlet end of the reversing valve is respectively connected with the liquid outlet of the energy storage box and the application end outlet, and the inlet end passage of the reversing valve can be switched by the control system; the one-way water stop valve is located on the pipeline between the application end outlet and the liquid inlet of the energy storage box; the start and stop of the one-way water stop valve and the start and stop of the reversing valve are both controlled by the control system.

[0012] As a preferred technical solution, when the energy storage end connected to the ground source heat pump is a multi-input and multi-output energy storage box, the multi-input and multi-output energy storage box is connected in series with the ground source heat pump through any heat exchange pipeline network, and the remaining heat exchange pipeline networks are each connected to an application end, so that the application end is connected in parallel to the series pipeline between the multi-input and multi-output energy storage box and the ground source heat pump.

[0013] As a further preferred technical solution, the heat exchange network includes heat exchange tubes and positioning lines. The heat exchange tubes are coiled in a serpentine shape and woven through the positioning lines to form a heat exchange network. The positioning lines are cross-wound around the heat exchange tubes.

[0014] As a preferred technical solution, the energy storage buried box also includes a gas-liquid exchange pipe that penetrates the box structure, and the box structure is filled with energy storage medium.

[0015] As a preferred technical solution, the energy storage medium includes solid fillers and phase change materials, and the solid fillers include soil, stone and construction solid waste.

[0016] As a preferred technical solution, an anti-seepage layer, a liquid storage layer and a heat-conducting layer are laid in the box structure, the anti-seepage layer is located at the bottom layer, and the liquid storage layer and the heat-conducting layer are arranged on the anti-seepage layer, and the liquid storage layer and the heat-conducting layer are laid at intervals from bottom to top until the top of the box structure; the heat exchange pipe network is located in the heat-conducting layer.

[0017] As a preferred technical solution, the anti-seepage layer is filled with any one or more combinations of granular solid fillers for absorbing liquid to prevent leakage, the liquid storage layer is filled with any one or more combinations of solid fillers with a diameter of more than 5 cm, and the heat conductive layer is filled with any one or more combinations of solid fillers with a diameter of less than 3 cm. The solid fillers in the heat conductive layer are wrapped around the heat exchange tubes.

[0018] As described above, the utility model has the following beneficial effects:

[0019] (1) The utility model provides an energy circulation system with double-sided energy storage and heat exchange, which can flexibly configure the energy storage ends on both sides of the energy circulation system according to specific application scenarios and energy requirements. By arranging a combination of energy storage underground boxes and energy storage water tanks with different numbers of heat exchange pipe networks at each energy storage end, while meeting performance requirements, it can control costs and simplify the construction process to achieve efficient energy transfer and storage; and the configuration of different numbers of heat exchange pipe networks can also help to achieve energy balance on both sides of the ground source heat pump, optimize the system's working efficiency and thermal energy utilization.

[0020] (2) The energy circulation system of the double-sided energy storage and heat exchange of the utility model can be applied to small application scenarios such as small buildings or independent houses through the configuration of a single-inlet and single-outlet energy storage box or energy storage water tank. Due to its simple structure and low cost, it is suitable for use in situations where energy demand is small; in addition, when the energy demand at the application end is single, such as when a building mainly relies on one form of energy (such as heating or cooling), the configuration of this single-inlet and single-outlet energy storage box or energy storage water tank can ensure efficient energy transfer.

[0021] (3) The utility model provides a double-sided energy storage and heat exchange energy circulation system, which can be applied to large-scale application scenarios such as large commercial buildings, office buildings or industrial areas through the configuration of multi-input and multi-output energy storage boxes. These areas usually have high energy demands and complex energy management systems. For example, in situations where multiple energy demands (such as heating, cooling and hot water, etc.) need to be met at the same time, the multi-input and multi-output energy storage boxes can better balance and distribute energy to meet diversified energy demands.

[0022] (4) The utility model provides an energy circulation system with double-sided energy storage and heat exchange. By mixing and configuring a single-input single-output energy storage box and a multi-input multi-output energy storage box, the energy demand at the application end can be met. For example, when the energy demand on one side of a building is significantly higher than that on the other side, a mixed configuration can be adopted to meet the differentiated needs of different areas. In addition, during the phased construction or expansion of a building, the configuration of the buried energy storage box can be flexibly adjusted according to the needs of different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the composition structure of an energy circulation system with double-sided energy storage and heat exchange in Example 1 of the utility model.

[0024] Figure 2 It is a schematic diagram of the composition structure of an energy circulation system with double-sided energy storage and heat exchange in Example 2 of the utility model.

[0025] Figure 3 It is a schematic diagram of the composition structure of an energy circulation system with double-sided energy storage and heat exchange in Example 3 of the utility model.

[0026] Figure 4 It is a schematic diagram of the composition structure of an energy circulation system with double-sided energy storage and heat exchange in Example 4 of the utility model.

[0027] Figure 5 It is a partial three-dimensional schematic diagram of the heat exchange pipe network wall in the single-layer heat exchange pipe network structure of the utility model.

[0028] Figure 6 When using Figure 5 Right view of the buried energy storage box with a single layer of heat exchange pipe network wall.

[0029] Figure 7 It is a three-dimensional schematic diagram when the heat exchange tubes are compiled into a double-layer heat exchange pipe network structure through positioning lines.

[0030] Among them, the specific descriptions of the accompanying drawings are as follows: 1. Ground source heat pump; 2. Application end; 31. Single-inlet and single-outlet energy storage box; 32. Multi-inlet and multi-outlet energy storage box; 41. First circulation pump; 42. Second circulation pump; 5. One-way water stop valve; 61. First inlet end of the reversing valve; 62. Second inlet end of the reversing valve; 7. Energy storage water tank; 8. Box structure; 9. Heat exchange pipe network wall; 91. Liquid inlet; 92. Liquid outlet; 93. Heat exchange pipe; 94. Positioning line; 10. Gas-liquid exchange pipe; 101. Air exchange pipe; 102. Liquid exchange pipe. DETAILED DESCRIPTION

[0031] In order to better understand the purpose, structure and function of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In the description of the present invention, it should be noted that the positional relationships indicated by terms such as “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” cited in this specification are based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] Example 1

[0034] like Figure 1As shown, this embodiment provides a double-sided energy storage and heat exchange energy circulation system when the energy storage ends on both sides of the ground source heat pump 1 are both single-inlet and single-outlet energy storage boxes 31 and the number of heat exchange pipe networks is the same, including a ground source heat pump 1, an application end 2, an energy storage end and a control system, wherein the energy storage end is connected to the ground source heat pump 1 and the application end 2 respectively through a circulation pipeline, the left side of the ground source heat pump 1 is connected to energy storage end 1, and the right side of the ground source heat pump 1 is connected to energy storage end 2, the energy storage end 1 includes at least one energy storage underground box, the energy storage end 2 includes an energy storage water tank 7 and / or an energy storage underground box, and correspondingly, the energy storage end 1 is connected to the application end 1, and the energy storage end 2 is connected to the application end 2. It should be noted here that the application end includes but is not limited to an air conditioning system, a cold storage system or a drying treatment system, and the application end 1 and the application end 2 are both provided with a heat exchanger in the corresponding system. When the geothermal heat pump 1 is running, the energy storage ends on the left and right sides of the geothermal heat pump 1 exchange cold and hot sources, so that one energy storage end accumulates cold energy while the other energy storage end accumulates heat energy. In this embodiment, both energy storage end 1 and energy storage end 2 are energy storage underground boxes, and both are single-inlet and single-outlet energy storage boxes 31. In other embodiments, energy storage end 1 is an energy storage underground box, and energy storage end 2 is an energy storage water tank 7. In another embodiment, energy storage end 1 is an energy storage underground box, and energy storage end 2 is an energy storage water tank 7 and an energy storage underground box.

[0035] It should be noted that, in the energy storage ends on the left and right sides of the ground source heat pump 1, the energy storage end 1 is connected to an energy storage underground box; when the energy storage demand of the energy storage end 2 is small, the energy storage end 2 is only connected to the energy storage water tank 7; when the energy storage demand of the energy storage end 2 is large, the energy storage end 2 is only connected to the energy storage underground box or is simultaneously connected to the energy storage underground box and the energy storage water tank 7. At this time, the energy storage underground box and the energy storage water tank 7 are connected in parallel, and the energy storage water tank 7 supplies energy to the application end with small energy storage demand. When the energy storage end of the ground source heat pump 1 is an energy storage underground box, the number of energy storage underground boxes provided at the single-side energy storage end of the ground source heat pump 1 is determined according to the difference in heat load, geographical conditions or economic costs. First, the number of underground energy storage boxes on one side of the geothermal heat pump 1 is set according to the heat load or heat source demand of the energy storage end on that side. Specifically, when there are more rooms or equipment on one side of the building that need to be cooled or heated, the application end 2 on that side corresponding to the geothermal heat pump 1 faces a greater heat load or heat source demand. At this time, multiple underground energy storage boxes are set at the energy storage end on that side of the geothermal heat pump 1 to balance and meet the cold and heat source demands; second, according to the limitations of geographical conditions (such as soil type and available space), the number and layout of the underground energy storage boxes on the energy storage ends on both sides of the geothermal heat pump 1 are adjusted; third, the number of underground energy storage boxes installed on both sides of the geothermal heat pump 1 is determined based on the project's budget and cost-effectiveness to optimize the overall thermal performance and energy utilization.

[0036] like Figure 6As shown, the energy storage buried box includes a box structure 8 buried underground and a heat exchange pipe network wall 9 located inside the box structure 8. The heat exchange pipe network wall 9 is perpendicular to the bottom of the box structure 8, and the heat exchange pipe network wall 9 is provided with a heat exchange pipe network that runs horizontally through the wall. The overall structure of the wall and the heat exchange pipe network forms the supporting skeleton of the energy storage buried box. At the same time, by backfilling solid fillers in the energy storage buried box, the heat exchange efficiency of the heat exchange pipe network is improved. At the same time, the internal structure of the energy storage buried box is ensured to be stable, and the ability to resist lateral pressure deformation is improved, which is economical and practical. The heat exchange pipe network includes heat exchange tubes 93 and positioning lines 94. The heat exchange tubes 93 are coiled in a serpentine shape and woven through the positioning lines 94 to form a heat exchange pipe network. The positioning lines 94 are cross-wound around the heat exchange tubes 93. Figure 7 As shown, the heat exchange network includes a single heat exchange tube 93 and positioning lines 94. The single heat exchange tube 93 is coiled in a serpentine shape and is woven into a C-shaped heat exchange network by cross-winding the positioning lines 94 on the heat exchange tube 93. In this embodiment, as shown in FIG. Figure 5 and Figure 6 As shown, the single heat exchange network in the single-inlet and single-outlet energy storage box 31 is L-shaped. The positioning lines 94 include but are not limited to metal lines, and the metal lines are preferably metal aluminum lines, which are conducive to the weaving of the heat exchange pipes 93, and it is easier to shape and fix the heat exchange pipe network while reducing the difficulty of construction. The heat exchange pipes 93 include but are not limited to PE pipes or metal pipes. Each heat exchange pipe 93 is provided with a liquid inlet 91 and a liquid outlet 92, and a circulation pump is provided at the liquid outlet 92. The energy storage buried box is connected to the circulation pipeline through the circulation pump, and the heat exchange network is filled with a liquid circulation medium for circulating and transporting energy, and the liquid circulation medium is not limited to water or oil.

[0037] The box structure 8 is formed by assembling and fixing the thermal insulation and waterproof panels. The outer sides of the thermal insulation and waterproof panels constituting the box structure 8 are in contact with the soil, so that a sealed thermal insulation and waterproof layer isolated from the surrounding soil is formed by the thermal insulation and waterproof panels. The fixing methods between the thermal insulation and waterproof panels include but are not limited to mortise and tenon connection, hinged connection or adhesive connection. In this embodiment, the thermal insulation and waterproof panels are plastic panels, which include but are not limited to foamed polyurethane panels, polystyrene particle boards or polystyrene boards, and have the advantages of being light and low in cost. The thermal insulation and waterproof panels are connected by adhesive to form a sealed box structure 8. In other embodiments, the thermal insulation and waterproof board can also be an integrally formed board or a composite board. The integrally formed board is a standard groove-shaped thermal insulation and waterproof board prefabricated in the factory and can be directly hoisted and placed in the underground tunnel. After the construction in the standard groove-shaped board is completed, the top thermal insulation and waterproof board of matching shape is installed to complete the sealing of the box structure 8, saving the construction time of assembling the box structure 8 in the underground tunnel. The composite board is composed of a core board and a metal board, an inorganic board or an organic board bonded by unsaturated resin. The core board includes but is not limited to rock wool board, glass wool felt, bamboo fiber cutting board, foam board, rubber-plastic board, foamed polyurethane board, wooden honeycomb board, glass magnesium board, and glass board. Different composite board combinations are selected according to the temperature changes in the project construction area and the local soil conditions, which can further improve the thermal insulation and waterproof effects.

[0038] The box structure 8 is filled with an energy storage medium, which includes solid fillers and phase change materials. The solid fillers include but are not limited to soil, stones and construction solid waste. The construction solid waste includes but is not limited to bricks, cement blocks, slag powder or metal fiber wire. The construction solid waste is recycled, classified and processed during construction, which reduces the material cost during construction backfilling and constructs a backfill layer with more reasonable thermal conductivity.

[0039] The box structure 8 of the energy storage buried box is provided with an impermeable layer, a liquid storage layer and a heat-conducting layer. The impermeable layer is located at the bottom layer, and the liquid storage layer and the heat-conducting layer are arranged on the impermeable layer. The liquid storage layer and the heat-conducting layer are arranged from bottom to top at intervals until the top of the box structure 8; the heat exchange pipe network is located in the heat-conducting layer. The impermeable layer is filled with a combination of any one or more granular solid fillers such as slag powder or soil. The soil can be preferably bentonite, so that after absorbing the liquid, it can effectively prevent the liquid inside the pipe network from leaking out of the bottom of the box structure 8. The impermeable layer is provided with a liquid storage layer and a heat-conducting layer, and the liquid storage layer and the heat-conducting layer are arranged at intervals until the top of the box structure 8; the liquid storage layer is filled with a combination of any one or more solid fillers such as stones, bricks or cement blocks with a diameter of more than 5 cm, which can support the stability of the box structure 8. At the same time, since there will be a large number of gaps and channels with large gaps between each stone, brick or cement block during filling, more liquid storage space is provided. , can be filled with more phase change materials with high specific heat capacity, which makes up for the demand for short-term energy storage, which is economical, practical and easy to implement; the heat-conducting layer is filled with a combination of any one or more solid fillers with a diameter of less than 3 cm, such as crushed stones, broken bricks, broken cement blocks, large-grained sand or metal fiber wires, and the heat exchange network is located in the heat-conducting layer. The solid fillers in the heat-conducting layer are wrapped around the heat exchange tube 93, thereby forming a self-locking, increasing the stability of the heat exchange network, and ensuring that the position of the heat exchange tube 93 remains unchanged during heating or vibration. At the same time, by increasing the contact points between the heat exchange tube 93 and the small-diameter solid fillers, the heat conduction efficiency of the heat exchange tube 93 is also improved, thereby achieving a balanced distribution of cold energy or heat energy. In other embodiments, there is a gap between the laid solid fillers for filling more phase change materials.

[0040] The energy storage buried box also includes a gas-liquid exchange pipe 10 that penetrates the box structure 8. One end of the gas-liquid exchange pipe 10 penetrates the top of the box structure 8, so that the pipe port of the gas-liquid exchange pipe 10 is located outside the box structure 8, and the pipe port of the gas-liquid exchange pipe 10 is located higher than the highest point of the soil on the top of the box structure 8. The other end of the gas-liquid exchange pipe 10 extends to the inside of the box structure 8. Figure 5As shown, the gas-liquid exchange pipe 10 includes a ventilation pipe 101 and a liquid exchange pipe 102. The port of the ventilation pipe 101 located inside the box structure 8 is close to the top of the box structure 8, which is convenient for collecting and discharging the gas in the box. The port of the liquid exchange pipe 102 located inside the box structure 8 is close to the bottom insulation and waterproof board of the box structure 8, so as to ensure that the phase change material injected into the buried box through the gas-liquid exchange pipe 10 can evenly fill the buried box. The gas-liquid exchange pipe 10 is provided with a plurality of slots to increase the exchange rate between the gas-liquid exchange pipe 10 and the surrounding gas and liquid. When injecting liquid, one gas-liquid exchange pipe 10 can be used to inject liquid while another gas-liquid exchange pipe 10 is used to exhaust and pump air, so as to realize the rapid filling of the phase change material inside the box structure 8; in addition, when expansion occurs due to temperature changes, the excess gas generated inside the box structure 8 can also be discharged through the gas-liquid exchange pipe 10, so as to maintain the pressure stability of the box structure 8 and extend the service life. The top of the upper pipe port of the gas-liquid exchange pipe 10 that passes through the top of the box structure 8 is provided with an umbrella-shaped ventilation cap, so as to prevent foreign matter from entering the gas-liquid exchange pipe 10 while ensuring the smooth passage of the ventilation and liquid injection pipes, thereby avoiding the risk of blockage of the gas-liquid exchange pipe 10. The phase change material injected into the buried box through the gas-liquid exchange pipe 10 includes a combination of any one or more phase change materials of water, crystalline hydrated salt or paraffin particles. In the present embodiment, the injected phase change material is water. It needs to be further explained here that the thermal conductivity coefficients of the solid fillers and energy storage media mentioned are, from large to small, metal>stone>bricks, sand, construction solid waste>water, hydrated salt; the specific heat capacity of the solid fillers and energy storage media mentioned are, from large to small, hydrated salt>water>bricks, construction solid waste. Therefore, the positioning lines 94 used to weave the heat exchange network can further promote energy conduction between the heat exchange network and the solid filler and between the heat exchange network and the phase change material. Since water has the lowest thermal conductivity, the heat exchange network has a higher heat exchange efficiency and a large energy storage capacity.

[0041] The energy storage buried box includes a single-inlet single-outlet energy storage box 31 or a multi-inlet multi-outlet energy storage box 32. The single-inlet single-outlet energy storage box 31 is provided with only one heat exchange pipe network, and the multi-inlet multi-outlet energy storage box 32 is provided with no less than two heat exchange pipe networks. The heat exchange pipe networks of the multi-inlet multi-outlet energy storage box 32 are arranged horizontally in layers in the box structure 8 of the multi-inlet multi-outlet energy storage box 32. The heat exchange pipe networks are parallel to each other and horizontally distributed on the heat exchange pipe network wall 9, ensuring full contact between the heat exchange pipe network and the surrounding heat transfer medium, improving the energy storage efficiency per unit volume, and improving the heat conductivity. The circulating pump includes a first circulating pump 41 and a second circulating pump 42. The first circulating pump 41 is located at the heat exchange pipe network outlet 92 connected to the ground source heat pump 1, and the second circulating pump 42 is located at the heat exchange pipe network outlet 92 only connected to the application end 2.

[0042] It should be further explained that the type of energy storage underground box unit and the specific number of heat exchange pipes are determined according to the efficiency of heat transfer and the complexity of the system. First, in some application scenarios, in order to improve the efficiency of heat transfer, more heat exchange pipes are installed in the energy storage underground box at the energy storage end of the ground source heat pump 1, which helps to better store or release cold sources or heat sources, thereby improving the overall performance of the system; second, for more complex thermal systems, such as a single side of the ground source heat pump 1 is arranged with multiple parallel application ends 2. At this time, by setting more heat exchange pipes, the uniform distribution and efficient transfer of heat can be ensured, which helps to improve the reliability and stability of the system.

[0043] In this embodiment, the energy storage ends on the left and right sides of the ground source heat pump 1 are respectively a single-inlet single-outlet energy storage box 31, each of which is only provided with a heat exchange pipe network, and the single-inlet single-outlet energy storage box 31 forms a switchable circulation pipeline with the ground source heat pump 1 and the application end 2 through a water valve, and the application end 2 is connected to the series pipeline between the single-inlet single-outlet energy storage box 31 and the ground source heat pump 1 through a water valve, and the water valve includes a one-way water stop valve 5 and a reversing valve, and the one-way water stop valve 5 is located at the application end 2 On the pipeline between the outlet and the liquid inlet 91 of the heat exchange network of the energy storage buried box, the reversing valve is a one-way two-way reversing valve, including an outlet end, a first inlet end and a second inlet end. The reversing valve is arranged on the inlet pipeline of the ground source heat pump 1, and the outlet end of the reversing valve is connected to the inlet of the ground source heat pump 1, the first inlet end of the reversing valve is connected to the liquid outlet 92 of the heat exchange network of the energy storage buried box, and the second inlet end of the reversing valve is connected to the outlet of the application end 2. The inlet end passage of the reversing valve can be switched by the control system.

[0044] In actual operation, the control system controls the opening and closing of the ground source heat pump 1, the first circulation pump 41, the one-way water stop valve 5 and the reversing valve respectively, so as to realize the switching of the circulation path under different working conditions. In this embodiment, the control system includes a heat pump controller, a left controller group and a right controller group. The heat pump controller is used to control the start and stop of the ground source heat pump 1. The left controller group and the right controller group respectively include three controllers, which respectively correspond to the opening and closing of the circulation pump, the opening and closing of the one-way water stop valve 5, and the direction switching and closing of the outlet of the reversing valve. The controller used to control the opening and closing of various pumps, the opening and closing of various valves or the reversing of the multi-way valve belongs to conventional technical means, and does not involve procedural improvements here, so it will not be repeated.

[0045] Working condition 1: When there is no application demand but there is energy storage demand, such as when the electricity price is low during the off-peak hours at night, the ground source heat pump 1 is turned on, and the first circulation pumps 41 on both sides are turned on at the same time, the one-way water stop valves 5 on both sides are closed, and the inlet ends of the reversing valves on both sides are switched to a state where they are only connected to the outlet 92 of the heat exchange pipe network of the energy storage buried box. At this time, only two-sided exchange energy storage circulation is carried out in the heat exchange system, so that the heat energy in the energy storage buried box at the left energy storage end of the ground source heat pump 1 is transported to the ground source heat pump 1 with the liquid circulation medium in the circulation pipeline as a carrier for exchange and storage in the energy storage buried box at the right energy storage end. After the ground source heat pump 1 is continuously operated, the heat energy in the energy storage buried box on the right side of the ground source heat pump 1 is continuously accumulated, and the cold energy in the energy storage buried box on the left side of the ground source heat pump 1 is continuously accumulated by extracting the heat energy. At this time, cold energy and heat energy are stored in the system at the same time, that is, the circulation path in the system is a one-way dual energy storage circulation path: left energy storage end → left first circulation pump 41 → left reversing valve first inlet end 61 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → right reversing valve first inlet end 61 → ground source heat pump 1 → left energy storage end.

[0046] Working condition 2: When there is application demand and energy storage demand, such as low electricity prices during off-peak hours at night, and heating in winter or summer, the ground source heat pump 1 is turned on, and the first circulation pumps 41 on both sides are turned on at the same time, and the one-way water stop valves 5 on both sides are closed, and the inlet end of the reversing valve on the side with application demand is switched to a state connected to the outlet of the application end 2. At this time, the heat exchange system simultaneously performs a double-sided exchange energy storage cycle and an application energy release cycle. While the energy storage buried box on one side performs a cold and hot source exchange energy storage cycle with the energy storage buried box on the other side through the ground source heat pump 1, the liquid circulating medium in the circulation pipeline releases cold energy or heat energy when it flows through the application end 2.

[0047] When there is application demand on both sides of the ground source heat pump 1, the system releases cold energy and heat energy while storing them. That is, the circulation path in the system is a one-way dual-energy storage and multi-energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left reversing valve second inlet end 62 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → right application end 2 heat exchanger → right reversing valve second inlet end 62 → ground source heat pump 1 → left energy storage end.

[0048] When only one side of the ground source heat pump 1 has an application demand, the circulation path in the system is a one-way dual energy storage and single energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left reversing valve second inlet end 62 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → right reversing valve first inlet end 61 → ground source heat pump 1 → left energy storage end; or, left energy storage end → left first circulation pump 41 → left reversing valve first inlet end 61 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → right application end 2 heat exchanger → left reversing valve second inlet end 62 → ground source heat pump 1 → left energy storage end.

[0049] Under operating conditions one and two, the cold source or heat source in the energy storage ends on the left and right sides of the heat pump is continuously accumulated, and the accumulated energy can be used across seasons or when there is a large temperature difference between day and night.

[0050] Working condition three: when there is application demand but no energy storage demand, for example, when the energy storage ends on both sides of the ground source heat pump 1 have accumulated surplus energy and the electricity price is high during the daytime peak power period, the control system controls the ground source heat pump 1 to shut down. When the ground source heat pump 1 is not involved, according to the user's application needs, the control system controls the start of the circulation pump and the one-way water stop valve 5 on the circulation pipeline corresponding to the application end 2. At the same time, the control system controls the closing of the reversing valve on the inlet pipeline of the ground source heat pump 1. At this time, only the application energy release cycle is carried out in the heat exchange system, so that the cold energy or heat energy stored in the buried energy storage box at the energy storage end is transported to the application end 2 with the liquid circulation medium in the circulation pipeline as a carrier and released through the heat exchanger of the application end 2 for cooling or heating. Since the energy storage ends on both sides of the ground source heat pump 1 are independent of each other, and after the energy storage cycle of working condition one or working condition two, cold energy is accumulated in the energy storage buried box of one energy storage end, and heat energy is accumulated in the energy storage buried box of the other energy storage end, therefore, the application ends 2 corresponding to the energy storage ends on both sides can be used separately or simultaneously. The scenarios for separate use include: by connecting the circulation pipeline corresponding to the application end 2 of the energy storage end on one side with accumulated cold energy, it can provide cold energy for indoor cooling or cold storage refrigeration in summer; by connecting the circulation pipeline corresponding to the application end 2 of the energy storage end on one side with accumulated heat energy, it can provide heat energy for indoor heating, heating water or fans used for drying crops in winter, etc. The above-mentioned separate use scenarios can be combined according to user application requirements, and can be used simultaneously by connecting the circulation pipelines corresponding to the application end 2 of the energy storage ends on both sides at the same time, such as using air conditioning for cooling in summer while heating hot water. If cold energy and heat energy are released simultaneously in the system, that is, the circulation path in the system is a double-sided one-way energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left one-way water stop valve 5 → left energy storage end; at the same time, right energy storage end → right first circulation pump 41 → right application end 2 heat exchanger → right one-way water stop valve 5 → right energy storage end; if cold energy or heat energy is released in the system, the above-mentioned one-way energy release circulation path will be operated one by one.

[0051] Example 2

[0052] like Figure 2 As shown, based on Example 1, this embodiment provides an energy circulation system for double-sided energy storage and heat exchange when one energy storage end of the local heat pump 1 is a single-inlet and single-outlet energy storage box 31 and the other energy storage end is an energy storage water tank 7.

[0053] Since the energy storage water tank is a common ground energy storage end using water as a medium, it will not be described in detail here. The energy storage water tank 7 and the single-inlet and single-outlet energy storage tank 31 are connected to the ground source heat pump 1 in the same way as in Example 1 and are also connected to an application end, and the circulation pipeline is also provided with a first circulation pump 41, a one-way water stop valve 5 and a reversing valve. Therefore, the control switching of the ground source heat pump 1, the circulation pump, and the water pump under each working condition is also the same as in Example 1, and the corresponding circulation passages are also the same.

[0054] The only difference from Example 1 is that, since an energy storage water tank 7 is used in this embodiment, the liquid circulating medium in the circulation pipeline in this embodiment is only water.

[0055] Example 3

[0056] like Figure 3 As shown, this embodiment provides a double-sided energy storage and heat exchange energy circulation system when the energy storage ends on both sides of the ground source heat pump 1 are both multi-input and multi-output energy storage boxes 32 and the number of heat exchange pipes is the same.

[0057] Different from Example 1, in this embodiment, the energy storage ends on the left and right sides of the ground source heat pump 1 are respectively a multi-input and multi-output energy storage box 32, and each multi-input and multi-output energy storage box 32 is horizontally layered and arranged with two heat exchange pipe networks, and the circulating pump includes a first circulating pump 41 and a second circulating pump 42. The outlet 92 of the heat exchange pipe network connected to the ground source heat pump 1 is the first circulating pump 41, and the outlet 92 of the heat exchange pipe network connected to the application end 2 is the second circulating pump 42. A single multi-input and multi-output energy storage box 32 is connected in series with the ground source heat pump 1 through any heat exchange pipe network in the box structure 8 through the first circulating pump 41, and the other heat exchange pipe network is connected to a corresponding application end 2 through the second circulating pump 42, so as to realize that the application end 2 is connected in parallel to the series pipeline between the two multi-input and multi-output energy storage boxes 32 and the ground source heat pump 1, thereby forming a relatively independent circulation pipeline in the same multi-input and multi-output energy storage box 32.

[0058] In actual operation, the control system controls the opening and closing of the ground source heat pump 1, the first circulation pump 41, and the second circulation pump 42 respectively, so as to realize the switching of the circulation path under different working conditions. In this embodiment, the control system includes a heat pump controller, a left controller group, and a right controller group. The heat pump controller is used to control the start and stop of the ground source heat pump 1. The left controller group and the right controller group respectively include two controllers, which respectively control the opening and closing of the first circulation pump 41 and the opening and closing of the second circulation pump 42. The controllers used to control the opening and closing of the ground source heat pump 1, the first circulation pump 41, and the second circulation pump 42 are all conventional technical means, and do not involve procedural improvements here, so they will not be repeated.

[0059] Working condition 1:

[0060] When there is no application demand but there is a demand for energy storage, such as when the electricity price is low during the night off-peak period,

[0061] Turn on the ground source heat pump 1, and the first circulation pumps 41 between the energy storage buried boxes on both sides and the ground source heat pump 1 are turned on, and the second circulation pumps 42 between the energy storage buried boxes and the application end 2 are turned off. At this time, only the double-side exchange energy storage cycle is performed in the heat exchange system. At this time, cold energy and heat energy are stored in the system at the same time, that is, the circulation path in the system is a one-way dual energy storage circulation path: left energy storage end → left first circulation pump 41 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end.

[0062] Working condition 2: When there is application demand and energy storage demand, such as when the electricity price is low during the off-peak hours at night, such as in winter and summer, the ground source heat pump 1 is turned on, and the first circulation pump 41 between the energy storage underground boxes on both sides and the ground source heat pump 1 is turned on. At the same time, only the second circulation pump 42 between the corresponding application end 2 with application demand and the energy storage underground box is turned on. At this time, the double-sided exchange energy storage cycle and the application energy release cycle are carried out simultaneously in the heat exchange system.

[0063] When there are application demands on both sides of the geothermal heat pump 1, the system releases cold energy and heat energy while storing them. That is, the circulation path in the system is a multi-pass dual-energy storage and multi-release circulation path: left energy storage end → left first circulation pump 41 → geothermal heat pump 1 → right energy storage end → right first circulation pump 41 → geothermal heat pump 1 → left energy storage end; at this time, left energy storage end → left second circulation pump 42 → left application end 2 heat exchanger → left energy storage end, and at the same time, right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end.

[0064] When there is an application demand only on one side of the ground source heat pump 1, the circulation path in the system is a multi-pass dual-energy storage and single-energy release circulation path: left energy storage end → left first circulation pump 41 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end; at this time, left energy storage end → left second circulation pump 42 → left application end 2 heat exchanger → left energy storage end, or, right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end.

[0065] Working condition three: when there is application demand but no energy storage demand, for example, when the energy storage ends on both sides of the ground source heat pump 1 have accumulated surplus energy, or when the electricity price is high during the daytime peak power period, the control system controls the ground source heat pump 1 to shut down, and the circulation pumps between the energy storage underground boxes on both sides and the ground source heat pump 1 are all shut down. When the ground source heat pump 1 is not involved, according to the user's application needs, the control system controls only the circulation pump between the corresponding application end 2 and the energy storage underground box to start. At this time, only the application energy release cycle is carried out in the heat exchange system. When the system releases cold energy and heat energy at the same time, that is, the circulation path in the system is a one-way energy release circulation path: left energy storage end → left second circulation pump 42 → left application end 2 heat exchanger → left energy storage end, at the same time, right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end; if cold energy or heat energy is released in the system, the above-mentioned one-way energy release circulation path is selected to operate.

[0066] Example 4

[0067] like Figure 4 As shown, this embodiment provides a double-sided energy storage and heat exchange energy circulation system in which one side of the local heat pump 1 is a single-inlet and single-outlet energy storage box 31, the other side is a multi-inlet and multi-outlet energy storage box 32, and the number of heat exchange pipes at the energy storage ends on both sides is different.

[0068] Different from Example 3, in this embodiment, the left energy storage end of the ground source heat pump 1 is a single-inlet and single-outlet energy storage box 31, and the specific structure of the single-inlet and single-outlet energy storage box 31, and the circulation pipeline connection relationship between the single-inlet and single-outlet energy storage box 31 and the ground source heat pump 1 and the application end 2 are the same as those in Example 1; the right energy storage end of the ground source heat pump 1 is a multi-inlet and multi-outlet energy storage box 32, and the specific structure of the multi-inlet and multi-outlet energy storage box 32, and the circulation pipeline connection relationship between the multi-inlet and multi-outlet energy storage box 32 and the ground source heat pump 1 and the application end 2 are the same as those in Example 3, so they are not repeated here.

[0069] In actual operation, the control system controls the opening and closing of the ground source heat pump 1, the first circulation pump 41, the second circulation pump 42, the one-way water stop valve 5 and the reversing valve respectively, so as to realize the switching of the circulation path under different working conditions. In this embodiment, the control system includes a heat pump controller, a left controller group and a right controller group; the heat pump controller is used to control the start and stop of the ground source heat pump 1; the left controller group includes three controllers, which respectively correspond to the opening and closing of the circulation pump, the opening and closing of the one-way water stop valve 5, and the direction switching and closing of the outlet of the reversing valve; the right controller group includes two controllers, which respectively correspond to the opening and closing of the first circulation pump 41 and the opening and closing of the second circulation pump 42. The controllers used to control the opening and closing of various pumps, the opening and closing of various valves, and the reversing of multi-way valves are all conventional technical means, and do not involve procedural improvements here, so they will not be repeated.

[0070] Working condition 1: When there is no application demand but there is energy storage demand, turn on the ground source heat pump 1, turn on the first circulation pumps 41 on both sides, close the one-way water stop valve 5 on the left, and switch the inlet end of the reversing valve on the left to the state of being connected only to the outlet 92 of the heat exchange pipe network of the energy storage buried box. At the same time, turn off the second circulation pump 42 on the right. At this time, only the double-side exchange energy storage cycle is performed in the heat exchange system. At this time, cold energy and heat energy are stored in the system at the same time, that is, the circulation path in the system is a one-way dual energy storage circulation path: left energy storage end → left first circulation pump 41 → left reversing valve first inlet end 61 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end.

[0071] Working condition 2: When there is application demand and energy storage demand, turn on the ground source heat pump 1, at the same time, turn on the first circulation pumps 41 on both sides, close the one-way water stop valve 5 on the left, and switch the inlet end of the reversing valve on the side with application demand to a state connected to the outlet of the application end 2. At the same time, turn on the second circulation pump 42 between the corresponding application end 2 with application demand and the energy storage buried box. At this time, the double-sided exchange energy storage cycle and the application energy release cycle are carried out simultaneously in the heat exchange system.

[0072] When there are application demands on both sides of the ground source heat pump 1, the circulation path in the system is a multi-pass dual-energy storage and multi-energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left reversing valve second inlet end 62 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end; at the same time, right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end.

[0073] When only one side of the ground source heat pump 1 has an application demand, the circulation path in the system is a one-way dual energy storage and single energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left reversing valve second inlet end 62 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end; or, left energy storage end → left first circulation pump 41 → left reversing valve first inlet end 61 → ground source heat pump 1 → right energy storage end → right first circulation pump 41 → ground source heat pump 1 → left energy storage end, while right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end.

[0074] Working condition three: when there is application demand but no energy storage demand, the geothermal heat pump 1 is turned off, and the reversing valve on the inlet pipeline of the geothermal heat pump 1 is closed. According to the corresponding application end 2, the first circulation pump 41 on the left and the one-way water stop valve 5 are started, or the second circulation pump 42 on the right is started. At this time, only the application energy release cycle is performed in the heat exchange system. When the system releases cold energy and heat energy at the same time, the circulation path in the system is a double-sided one-way energy release circulation path: left energy storage end → left first circulation pump 41 → left application end 2 heat exchanger → left one-way water stop valve 5 → left energy storage end; at the same time, right energy storage end → right second circulation pump 42 → right application end 2 heat exchanger → right energy storage end; if cold energy or heat energy is released in the system, the above-mentioned one-way energy release circulation path is selected to operate.

[0075] In actual work, when the demand for energy storage and release is small, an underground energy storage box is set on one side of the ground source heat pump 1, and an energy storage water tank 7 is set on the other side, or the energy storage water tank 7 and the energy storage underground box are set at the same time. When the demand for energy storage and release is large, underground energy storage boxes are set on both sides of the ground source heat pump 1, and according to the on-site project conditions (such as heat load differences, geographical conditions, economic costs, heat transfer efficiency or system complexity), the number of underground energy storage boxes set at the single energy storage end of the ground source heat pump 1, the type of underground energy storage box monomers and the specific number of heat exchange pipelines are adjusted. Therefore, in addition to the above-mentioned embodiments 1-3, in other embodiments, the following combinations are also included: when the number of heat exchange pipe networks at the energy storage ends on both sides of the ground source heat pump 1 is the same, ① one side of the ground source heat pump 1 is connected to a single multi-inlet and multi-outlet energy storage box 32, and the other side is connected to a combination of multiple energy storage buried boxes, the combination includes a combination of multiple single-inlet and single-outlet energy storage boxes 31, a combination of multiple multi-inlet and multi-outlet energy storage boxes 32, or a single-inlet and single-outlet energy storage box 31 and a multi-inlet and multi-outlet energy storage box 32. or, ② both sides of the ground source heat pump 1 are connected to a combination of multiple multi-input and multi-output energy storage boxes 32; when the number of heat exchange pipe networks at the energy storage ends on both sides of the ground source heat pump 1 is different, ① both sides of the ground source heat pump 1 are connected to a single-input and single-output energy storage box 31, but the total number of heat exchange pipe networks in the single-input and single-output energy storage boxes 31 on both sides is different; or, ② both sides of the ground source heat pump 1 are connected to a multi-input and multi-output energy storage box 32, but the total number of heat exchange pipe networks in the multi-input and multi-output energy storage boxes 32 on both sides is different. In addition, the system in the utility model can connect more energy storage underground boxes and their corresponding application ends 2 in parallel according to actual application needs (such as adding or reducing application equipment, changing the energy release purpose of the building at the application end 2, rebuilding or adding, etc.).

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present invention are within the scope of protection of the present invention.

Claims

1. An energy circulation system with double-side energy storage and heat exchange, comprising a ground source heat pump (1), an application end (2), an energy storage end and a control system, characterized in that: The energy storage end is connected to the ground source heat pump (1) and the application end (2) respectively through a circulation pipeline. The left side and the right side of the ground source heat pump (1) are each connected to an energy storage end. The energy storage end located on one side includes at least one energy storage underground box, and the energy storage end located on the other side includes an energy storage water tank (7) and / or an energy storage underground box. The energy storage underground box includes a box structure (8) and a heat exchange pipe network wall (9) located inside the box structure (8). The heat exchange pipe network wall (9) is perpendicular to the bottom of the box structure (8), and the heat exchange pipe network wall (9) A heat exchange network is provided on the heat exchange network, the heat exchange network horizontally penetrates the heat exchange network wall (9), each heat exchange network is provided with a liquid inlet (91) and a liquid outlet (92), a circulation pump is provided at the liquid outlet (92), the start and stop of the ground source heat pump (1) and the start and stop of the circulation pump are controlled by a control system, and the heat exchange network is filled with a liquid circulation medium; when the ground source heat pump (1) is running, the energy storage ends on the left and right sides of the ground source heat pump (1) exchange cold and heat sources, so that one energy storage end accumulates cold energy while the other energy storage end accumulates heat energy.

2. The energy circulation system with double-sided energy storage and heat exchange according to claim 1 is characterized in that: The energy storage underground box comprises a single-inlet single-outlet energy storage box (31) or a multi-inlet multi-outlet energy storage box (32); the single-inlet single-outlet energy storage box (31) is provided with only one heat exchange pipe network; the multi-inlet multi-outlet energy storage box (32) comprises no less than two heat exchange pipe networks; the heat exchange pipe networks of the multi-inlet multi-outlet energy storage box (32) are arranged in a horizontal layered manner in a box body structure (8) of the multi-inlet multi-outlet energy storage box (32).

3. The energy circulation system of double-sided energy storage and heat exchange according to claim 2 is characterized in that: When the energy storage end connected to the ground source heat pump (1) is a single-inlet single-outlet energy storage box (31), the single-inlet single-outlet energy storage box (31) is connected in series with the ground source heat pump (1) via a circulation pump, and the application end (2) is connected to the series pipeline between the single-inlet single-outlet energy storage box (31) and the ground source heat pump (1) via a water valve.

4. The energy circulation system with double-sided energy storage and heat exchange according to claim 3 is characterized in that: The water valve comprises a one-way water stop valve (5) and a reversing valve; the reversing valve is arranged on the inlet pipeline of the ground source heat pump (1); the outlet end of the reversing valve is in communication with the inlet of the ground source heat pump (1); the inlet end of the reversing valve is in communication with the liquid outlet (92) of the energy storage box and the outlet of the application end (2), respectively; the inlet end passage of the reversing valve can be switched by a control system; the one-way water stop valve (5) is located on the pipeline between the outlet of the application end (2) and the liquid inlet (91) of the energy storage box; the start and stop of the one-way water stop valve (5) and the start and stop of the reversing valve are both controlled by the control system.

5. The energy circulation system with double-sided energy storage and heat exchange according to claim 2 is characterized in that: When the energy storage end connected to the ground source heat pump (1) is a multi-input multi-output energy storage box (32), the multi-input multi-output energy storage box (32) is connected in series with the ground source heat pump (1) through any heat exchange pipe network, and the remaining heat exchange pipe networks are each connected to an application end (2), so that the application end (2) is connected in parallel to the series pipeline between the multi-input multi-output energy storage box (32) and the ground source heat pump (1).

6. An energy circulation system for double-sided energy storage and heat exchange according to any one of claims 1 to 5, characterized in that: The heat exchange pipe network comprises heat exchange pipes (93) and positioning lines (94); the heat exchange pipes (93) are coiled in a serpentine shape and woven through the positioning lines (94) to form the heat exchange pipe network; the positioning lines (94) are cross-wound on the heat exchange pipes (93).

7. The energy circulation system with double-sided energy storage and heat exchange according to claim 6 is characterized in that: The energy storage buried box also includes a gas-liquid exchange pipe (10) that penetrates the box structure (8), and the box structure (8) is filled with energy storage medium.

8. The energy circulation system of double-sided energy storage and heat exchange according to claim 7 is characterized in that: The energy storage medium includes a solid filler and a phase change material, and the solid filler includes soil, stone and construction solid waste.

9. The energy circulation system with double-sided energy storage and heat exchange according to claim 8, characterized in that: An impermeable layer, a liquid storage layer and a heat conducting layer are laid in the box structure (8); the impermeable layer is located at the bottom layer, and a liquid storage layer and a heat conducting layer are arranged on the impermeable layer. The liquid storage layer and the heat conducting layer are laid at intervals from bottom to top until the top of the box structure (8); the heat exchange pipe network is located in the heat conducting layer.

10. The energy circulation system with double-sided energy storage and heat exchange according to claim 9, characterized in that: The anti-seepage layer is filled with any one or more combinations of granular solid fillers for absorbing liquid to prevent leakage, the liquid storage layer is filled with any one or more combinations of solid fillers with a diameter of more than 5 cm, and the heat conductive layer is filled with any one or more combinations of solid fillers with a diameter of less than 3 cm. The solid fillers in the heat conductive layer are wrapped around the heat exchange tube (93).

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