Ground source heat pump and solar energy coupled heating system

Abstract

The invention discloses a ground source heat pump and solar energy coupled heating system, and relates to the technical field of heating. Comprising a solar heat collection module, a ground source heat pump module, a heat storage module, a building terminal module and an intelligent control module. The solar heat collection module is connected with the heat storage module, the source heat pump module and the building terminal module and used for achieving solar heat storage, solar auxiliary ground source heat pump heat taking and direct building heat supply. The ground source heat pump module is connected with the building terminal module, so that a ground source heat pump supplies cold and heat to a building; the heat storage module is connected with the building terminal module, so that the heat storage device supplies heat to the building; the intelligent control module is connected with the solar heat collection module, the ground source heat pump module, the heat storage module and the building terminal module, so that start-stop control over solar heat collection circulation, regulation and control over a ground source heat pump unit and ground source side circulation, regulation and control over heat storage and release of the heat storage module and regulation of building terminal heat supply loads are achieved.

Description

Technical Field

[0001] This invention relates to the field of heating technology, and more specifically to a heating system coupled with a ground source heat pump and solar energy. Background Technology

[0002] Currently, with increasing global awareness of energy efficiency and environmental protection, utilizing renewable energy has become a significant trend in the building heating sector. Traditional heating systems rely on fossil fuels, consuming large amounts of non-renewable resources and generating substantial amounts of greenhouse gases and other pollutants. To address these issues, researchers are exploring new heating systems that combine clean energy technologies such as solar energy and ground source heat pumps.

[0003] However, while solar collectors can effectively convert solar radiation into heat, they are greatly affected by weather conditions and cannot guarantee a stable energy supply around the clock. On the other hand, ground source heat pumps, through heat exchange with the underground constant-temperature layer, can provide heat in winter and cooling in summer, exhibiting a high energy efficiency ratio. However, when using a ground source heat pump alone, long-term heat extraction or release may lead to soil temperature imbalance, thereby affecting the system's operating efficiency.

[0004] Therefore, how to provide a heating system that couples ground source heat pumps with solar energy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a heating system that couples a ground source heat pump with solar energy, aiming to achieve efficient energy utilization and ensure stable operation of the system under various environmental conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A heating system coupled with a ground source heat pump and solar energy, comprising:

[0008] Solar thermal collector modules, ground source heat pump modules, thermal storage modules, building terminal modules, and intelligent control modules;

[0009] The solar thermal collector module is connected to the heat storage module, the ground source heat pump module, and the building terminal module, respectively, to realize solar thermal storage, solar-assisted ground source heat pump heat extraction, and direct building heating; the ground source heat pump module is connected to the building terminal module to realize ground source heat pump for building cooling and heating; the heat storage module is connected to the building terminal module to realize heat storage device for building heating; the intelligent control module is connected to the solar thermal collector module, the ground source heat pump module, the heat storage module, and the building terminal module, respectively, to realize start-up and shutdown control of solar thermal collector circulation, regulation of ground source heat pump unit and ground source side circulation, regulation of heat storage and release of heat storage module, and adjustment of building terminal heating load.

[0010] Furthermore, the solar thermal collector module includes:

[0011] Solar collectors and circulating water pumps for solar collectors;

[0012] The solar collector is connected to the heat storage module and the heat collection circulating water pump in sequence through pipelines to form a heat collection circulation loop.

[0013] Furthermore, the ground source heat pump module includes:

[0014] First ground source heat pump unit, second ground source heat pump unit, first underground pipe group, second underground pipe group, first ground source circulating water pump unit, second ground source circulating water pump, first ground source control valve and second ground source control valve;

[0015] The ground source side outlet of the first ground source heat pump unit is connected to the first ground source circulating water pump and the first ground source control valve in sequence through pipelines, and then connected to the inlet of the first underground pipe group; the outlet of the first underground pipe group is connected to the ground source side inlet of the first ground source heat pump unit through pipelines, forming the first independent circulation loop;

[0016] The ground source side outlet of the second ground source heat pump unit is connected to the second ground source circulating water pump and the second ground source control valve in sequence through pipelines; the outlet of the second ground source control valve is connected to the inlet of the first underground pipe group and the inlet of the second underground pipe group respectively through pipelines; the outlet of the first underground pipe group and the outlet of the second underground pipe group are connected to the ground source side inlet of the second ground source heat pump unit after being merged through pipelines, forming a composite circulation loop;

[0017] The first underground pipe group and the second underground pipe group are respectively equipped with a first pipe group heat meter and a second pipe group heat meter.

[0018] Furthermore, the heat storage module includes:

[0019] Hot water storage tank, first thermal storage control valve, second thermal storage control valve, phase change thermal storage tank and thermal storage circulating water pump;

[0020] The hot water storage tank is connected in sequence to the heat storage circulating water pump, the first heat storage control valve, the first underground pipe group, and the second heat storage control valve through pipelines to form a heat storage circulation loop. The phase change heat storage tank is connected to the outlet end of the solar collector and the condenser side of the ground source heat pump module through bidirectional pipelines.

[0021] Furthermore, the first underground pipe group adopts a series-parallel hybrid structure, consisting of multiple groups of underground pipes connected in parallel and then in series. During heat storage, hot water flows from the internal underground pipe group to the outside, and during heat extraction, the flow direction is reversed. The second underground pipe group adopts a fully parallel structure, and each underground pipe branch is equipped with a flow balancing valve.

[0022] Furthermore, the phase change heat storage tank is filled with composite phase change material, and the pipeline switching with the solar collector module, ground source heat pump module and building terminal module is realized through an electric ball valve.

[0023] Furthermore, a domestic hot water heat exchange coil is installed inside the hot water storage tank. The domestic hot water heat exchange coil is connected to the interior of the building through pipelines, and a tap water supply valve is installed at the inlet end of the domestic hot water heat exchange coil.

[0024] Furthermore, the building terminal module includes:

[0025] The system comprises a first building terminal device, a second building terminal device, a first terminal circulating water pump, a second terminal circulating water pump, a first terminal control valve, a second terminal control valve, a third terminal control valve, and a fourth terminal control valve.

[0026] The user-side water supply inlet of the first ground source heat pump unit is connected to the water supply inlet of the first building terminal device through the first user water supply main pipe.

[0027] The user-side water supply inlet of the second ground source heat pump unit is connected to the water supply inlet of the second building terminal device through the second user water supply main pipe;

[0028] The return water inlet of the first building terminal device is connected to the user-side return water inlet of the first ground source heat pump unit via the first user return water main pipe, the fourth terminal control valve and the first terminal circulating water pump in sequence.

[0029] The return water inlet of the second building terminal device is connected to the user-side return water inlet of the second ground source heat pump unit via the second user return water main pipe, the third terminal control valve and the second terminal circulating water pump in sequence;

[0030] A first bypass pipeline is provided between the first user water supply main and the second user water supply main, and the first terminal control valve is provided on the first bypass pipeline.

[0031] A second bypass pipeline is provided between the first user return water main and the second user return water main, and a second end control valve is provided on the second bypass pipeline.

[0032] Furthermore, the solar thermal collector module and the building terminal module form a direct heating loop, and the direct heating loop includes a solar heating circulating water pump, a first solar heating control valve, a second solar heating control valve, and a pressure control valve;

[0033] The hot water outlet of the hot water storage tank flows back to the hot water storage tank in sequence through the solar heating circulating water pump, the first solar heating control valve, the first building terminal device, the second solar heating control valve, and the pressure control valve.

[0034] Furthermore, the intelligent control module includes a controller, multiple temperature sensors, multiple flow sensors, and multiple pressure sensors;

[0035] Each temperature sensor is installed at the water outlet of the solar collector, the water inlet of the heat storage module, and inside the phase change heat storage tank.

[0036] Each flow sensor is installed in the solar thermal collector circulation loop, the water supply pipeline from the hot water storage tank to the end of the building, and the ground source side circulation loop of the ground source heat pump.

[0037] Each pressure sensor is installed at the collector outlet, the inlet and outlet of the hot water storage tank, the ground source side of the ground source heat pump unit, and the user side, respectively.

[0038] The controller's inputs are connected to each temperature sensor, each flow sensor, and each pressure sensor, respectively, and the controller's outputs are connected to the solar thermal collector module and the building terminal module, respectively.

[0039] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a heating system coupled with a ground source heat pump and solar energy, integrating a solar collector module, a ground source heat pump module, a heat storage module, and an intelligent control module into one unit, realizing efficient energy utilization and ensuring stable operation of the system under various environmental conditions. The specific beneficial effects are as follows:

[0040] (1) By integrating the advantages of solar collectors and ground source heat pumps, the system can flexibly adjust its working mode under different seasons and climate conditions, maximize the use of renewable energy, and reduce dependence on external energy.

[0041] (2) The design of the phase change thermal storage tank enables the system to store excess heat when solar energy is abundant and release it when needed, thus solving the problem of unstable solar energy supply. At the same time, the hot water storage tank can provide users with a continuous supply of domestic hot water, further enhancing the user experience.

[0042] (3) The intelligent control module automatically adjusts the working status of each component based on real-time monitoring data, including the start and stop of the pump, the opening and closing of the valve, etc., in order to achieve the best energy distribution and utilization effect and avoid energy waste.

[0043] (4) Compared with traditional heating methods, this system significantly reduces the emission of carbon dioxide and other pollutants, which helps to alleviate the global climate change problem.

[0044] (5) Through reasonable heat management and load control, the risk of performance degradation or damage caused by long-term single operation of ground source heat pump is reduced, thereby extending the service life of the entire system.

[0045] (6) The system design takes into account a variety of application scenarios. Whether it is a residential or commercial building, it can be customized according to specific needs, which improves the applicability of the system. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the overall system structure provided by the present invention;

[0048] Figure 2 This is a schematic diagram of the connection of the intelligent control module provided by the present invention. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] See Figure 1 This invention discloses a heating system coupled with a ground source heat pump and solar energy, comprising:

[0051] Solar thermal collector modules, ground source heat pump modules, thermal storage modules, building terminal modules, and intelligent control modules;

[0052] The solar thermal collector module is connected to the heat storage module, the ground source heat pump module, and the building terminal module, respectively, to realize solar thermal storage, solar-assisted ground source heat pump heat extraction, and direct building heating; the ground source heat pump module is connected to the building terminal module to realize ground source heat pump for building cooling and heating; the heat storage module is connected to the building terminal module to realize heat storage device for building heating; the intelligent control module is connected to the solar thermal collector module, the ground source heat pump module, the heat storage module, and the building terminal module, respectively, to realize start-up and shutdown control of solar thermal collector circulation, regulation of ground source heat pump unit and ground source side circulation, regulation of heat storage and release of heat storage module, and adjustment of building terminal heating load.

[0053] In one specific embodiment, the solar thermal collector module includes:

[0054] Solar collectors and circulating water pumps for solar collectors;

[0055] The solar collector is connected to the heat storage module and the heat collection circulating water pump in sequence through pipelines to form a heat collection circulation loop.

[0056] In one specific embodiment, the ground source heat pump module includes:

[0057] First ground source heat pump unit, second ground source heat pump unit, first underground pipe group, second underground pipe group, first ground source circulating water pump unit, second ground source circulating water pump, first ground source control valve and second ground source control valve;

[0058] The ground source side outlet of the first ground source heat pump unit is connected to the first ground source circulating water pump and the first ground source control valve in sequence through pipelines, and then connected to the inlet of the first underground pipe group; the outlet of the first underground pipe group is connected to the ground source side inlet of the first ground source heat pump unit through pipelines, forming the first independent circulation loop;

[0059] The ground source side outlet of the second ground source heat pump unit is connected to the second ground source circulating water pump and the second ground source control valve in sequence through pipelines; the outlet of the second ground source control valve is connected to the inlet of the first underground pipe group and the inlet of the second underground pipe group respectively through pipelines; the outlet of the first underground pipe group and the outlet of the second underground pipe group are connected to the ground source side inlet of the second ground source heat pump unit after being merged through pipelines, forming a composite circulation loop;

[0060] The first underground pipe group and the second underground pipe group are respectively equipped with a first pipe group heat meter and a second pipe group heat meter.

[0061] In one specific embodiment, the heat storage module includes:

[0062] Hot water storage tank, first thermal storage control valve, second thermal storage control valve, phase change thermal storage tank and thermal storage circulating water pump;

[0063] The hot water storage tank is connected in sequence to the heat storage circulating water pump, the first heat storage control valve, the first underground pipe group, and the second heat storage control valve through pipelines to form a heat storage circulation loop. The phase change heat storage tank is connected to the outlet end of the solar collector and the condenser side of the ground source heat pump module through bidirectional pipelines.

[0064] Specifically, the heat storage outlet of the hot water storage tank is connected to the heat storage circulating water pump, the first heat storage control valve, and then to the inlet of the first underground pipe group via pipelines; the outlet of the first underground pipe group is connected to the second heat storage control valve via pipelines and then to the heat storage return outlet of the hot water storage tank, forming a heat storage circulation loop.

[0065] The phase change heat storage tank is connected to the solar collector circulation loop (e.g., an interface is provided on the pipeline between the collector outlet and the hot water storage tank) and the user-side circulation loop of the ground source heat pump module (e.g., an interface is provided on the condenser-side circulation pipeline of the first ground source heat pump unit and / or the second ground source heat pump unit) via bidirectional pipelines and corresponding switching valves (such as the electric ball valve).

[0066] In one specific embodiment, the first underground pipe group adopts a series-parallel hybrid structure, which is composed of multiple groups of underground pipes connected in parallel and then in series. During heat storage, hot water flows from the internal underground pipe group to the outside, and during heat extraction, the flow direction is reversed. The second underground pipe group adopts a fully parallel structure, and each underground pipe branch is equipped with a flow balancing valve.

[0067] In one specific embodiment, the phase change heat storage tank is filled with composite phase change material, and the pipeline switching with the solar collector module, ground source heat pump module and building terminal module is realized through an electric ball valve.

[0068] In one specific embodiment, a domestic hot water heat exchange coil is installed inside the hot water storage tank. The domestic hot water heat exchange coil is connected to the interior of the building through a pipeline, and a tap water supply valve is installed at the inlet end of the domestic hot water heat exchange coil.

[0069] In one specific embodiment, the building end module includes:

[0070] The system comprises a first building terminal device, a second building terminal device, a first terminal circulating water pump, a second terminal circulating water pump, a first terminal control valve, a second terminal control valve, a third terminal control valve, and a fourth terminal control valve.

[0071] The user-side water supply inlet of the first ground source heat pump unit is connected to the water supply inlet of the first building terminal device through the first user water supply main pipe.

[0072] The user-side water supply inlet of the second ground source heat pump unit is connected to the water supply inlet of the second building terminal device through the second user water supply main pipe;

[0073] The return water inlet of the first building terminal device is connected to the user-side return water inlet of the first ground source heat pump unit via the first user return water main pipe, the fourth terminal control valve and the first terminal circulating water pump in sequence.

[0074] The return water inlet of the second building terminal device is connected to the user-side return water inlet of the second ground source heat pump unit via the second user return water main pipe, the third terminal control valve and the second terminal circulating water pump in sequence;

[0075] A first bypass pipeline is provided between the first user water supply main and the second user water supply main, and the first terminal control valve is provided on the first bypass pipeline.

[0076] A second bypass pipeline is provided between the first user return water main and the second user return water main, and a second end control valve is provided on the second bypass pipeline.

[0077] In one specific embodiment, the solar thermal collector module and the building terminal module form a direct heating loop, the direct heating loop including a solar heating circulating water pump, a first solar heating control valve, a second solar heating control valve and a pressure control valve;

[0078] The hot water outlet of the hot water storage tank flows back to the hot water storage tank in sequence through the solar heating circulating water pump, the first solar heating control valve, the first building terminal device, the second solar heating control valve, and the pressure control valve.

[0079] Specifically, in Figure 1 In this system, the solar collector circulation pump connects to the solar collector and then to the first temperature sensor, which collects solar energy and monitors the outlet water temperature. The second temperature sensor connects to the hot water storage tank, monitoring the return water temperature to ensure effective heat storage. The hot water storage tank is connected to the building terminal module and the domestic hot water exchange coil via a heat storage circulation pump, providing stable domestic hot water and heating. The phase change heat storage tank is connected to the outlet of the solar collector and the condenser side of the ground source heat pump module via a bidirectional pipeline. It contains a third temperature sensor and an electric ball valve for switching flow direction and monitoring temperature. The first and second ground source heat pump units are connected to the first and second underground pipe groups respectively via their respective ground source circulation pumps and ground source control valves, enabling heat exchange with the ground. The first and second building terminal devices are connected to the first and second ground source heat pump units respectively, forming independent heating circulation loops. Furthermore, the system includes bypass pipelines connecting the supply and return water mains of the two systems, equipped with corresponding control valves (not shown in the diagram).

[0080] See Figure 2 In one specific embodiment, the intelligent control module includes a controller, multiple temperature sensors, multiple flow sensors, and multiple pressure sensors;

[0081] Each temperature sensor is installed at the water outlet of the solar collector, the water inlet of the heat storage module, and inside the phase change heat storage tank.

[0082] Each flow sensor is installed in the solar collector circulation loop, the water supply pipeline from the hot water storage tank to the end of the building, and the ground source side circulation loop of the ground source heat pump. By monitoring the water flow in real time, the system can help control the pump efficiency and optimize heat transfer.

[0083] Each pressure sensor is installed at the collector outlet, the inlet and outlet of the hot water storage tank, the ground source side of the ground source heat pump unit, and the user side to monitor abnormal pressure changes and prevent equipment damage or performance degradation caused by excessively high or low pressure.

[0084] The controller's inputs are connected to each temperature sensor, each flow sensor, and each pressure sensor, respectively, and the controller's outputs are connected to the solar thermal collector module and the building terminal module, respectively.

[0085] Specifically, the present invention discloses a heating system that couples a ground source heat pump with solar energy, and the specific working process is as follows:

[0086] Cooling mode: The second ground source heat pump unit is started, and cooling is achieved only through the second underground pipe group. The first solar heating control valve, the second solar heating control valve, the first ground source control valve, the second ground source control valve and the fourth terminal control valve are closed. The first terminal control valve, the second terminal control valve and the third terminal control valve are opened. The flow regulating valve of the second pipe group is fully open.

[0087] Direct solar power supply mode: When the outlet water temperature of the solar collector is ≥40℃ and the building load is extremely low, the first terminal control valve and the second terminal control valve open, the third terminal control valve and the fourth terminal control valve close, the solar heating circulating water pump starts, and the ground source heat pump unit stops running.

[0088] Solar and first unit combined mode: When the temperature of the hot water storage tank is greater than or equal to the set heating temperature and the building load is extremely low, the first solar heating control valve, the second solar heating control valve, the fourth terminal control valve and the third ground source control valve are opened, the first terminal control valve, the second terminal control valve and the third terminal control valve are closed, and the solar heating circulating water pump, the first terminal circulating water pump and the first ground source heat pump unit are started.

[0089] Solar and second unit combined mode: When the temperature of the hot water storage tank is greater than or equal to the set heating temperature and the building load is normal load, the first solar heating control valve, the second solar heating control valve, the third terminal control valve, the first ground source control valve and the second ground source control valve are opened, the first terminal control valve, the second terminal control valve and the fourth terminal control valve are closed, and the solar heating circulating water pump, the second terminal circulating water pump and the second ground source heat pump unit are started.

[0090] First unit standalone mode: When the temperature of the hot water storage tank is less than the set heating temperature and the building load is extremely low, the first terminal control valve, the second terminal control valve, the fourth terminal control valve and the third ground source control valve are opened, the solar heating control valve and the third terminal control valve are closed, and the first terminal circulating water pump, the first ground source circulating water pump and the first ground source heat pump unit are started.

[0091] Second unit standalone mode: When the temperature of the hot water storage tank is less than the set heating temperature and the building load is normal load, the first terminal control valve, the second terminal control valve, the third terminal control valve, the first ground source control valve and the second ground source control valve are opened, the solar heating control valve and the fourth terminal control valve are closed, and the second terminal circulating water pump, the second ground source circulating water pump and the second ground source heat pump unit are started.

[0092] Cross-seasonal thermal storage mode: During the non-heating season, the first thermal storage control valve and the second thermal storage control valve are opened, the ground source control valve group is closed, and the thermal storage circulating water pump is started to store the solar heat in the hot water storage tank into the first underground pipe group.

[0093] Specifically, the solar collector module's heat collection cycle is controlled by the temperature difference detected by the first temperature sensor. When the temperature difference is ≥8℃, the heat collection circulation pump is started. The heat storage cycle is controlled by the temperature of the heat storage tank and the temperature difference between the heat storage supply and return water. When the temperature of the heat storage tank is ≥50℃ and the temperature difference between the heat storage supply and return water is ≥5℃, the heat storage circulation pump is started.

[0094] Specifically, the opening of the first and second pipe group flow regulating valves of the second ground source heat pump unit is dynamically adjusted according to the return water temperature collected by the heat meters of the first and second pipe groups to ensure that the heat extraction ratio of the first and second underground pipe groups matches the soil temperature field balance requirements.

[0095] Specifically, the phase change heat storage tank starts storing heat when the outlet water temperature of the solar collector is 30-40℃, and releases heat when the building terminal temperature is ≤35℃ at night. It achieves switching operation with the ground source heat pump unit through an intelligent control module.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0097] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating system coupled with a ground source heat pump and solar energy, characterized in that, include: Solar thermal collector modules, ground source heat pump modules, thermal storage modules, building terminal modules, and intelligent control modules; The solar thermal collector module is connected to the heat storage module, the ground source heat pump module, and the building terminal module, respectively, to realize solar thermal storage, solar-assisted ground source heat pump heat extraction, and direct building heating; the ground source heat pump module is connected to the building terminal module to realize ground source heat pump for building cooling and heating; the heat storage module is connected to the building terminal module to realize heat storage device for building heating; the intelligent control module is connected to the solar thermal collector module, the ground source heat pump module, the heat storage module, and the building terminal module, respectively, to realize start-up and shutdown control of solar thermal collector circulation, regulation of ground source heat pump unit and ground source side circulation, regulation of heat storage and release of heat storage module, and adjustment of building terminal heating load.

2. A heating system coupled with a ground source heat pump and solar energy according to claim 1, characterized in that, The solar thermal collector module includes: Solar collectors and circulating water pumps for solar collectors; The solar collector is connected to the heat storage module and the heat collection circulating water pump in sequence through pipelines to form a heat collection circulation loop.

3. A heating system coupled with a ground source heat pump and solar energy according to claim 2, characterized in that, The ground source heat pump module includes: First ground source heat pump unit, second ground source heat pump unit, first underground pipe group, second underground pipe group, first ground source circulating water pump unit, second ground source circulating water pump, first ground source control valve and second ground source control valve; The ground source side outlet of the first ground source heat pump unit is connected to the first ground source circulating water pump and the first ground source control valve in sequence through pipelines, and then connected to the inlet of the first underground pipe group; the outlet of the first underground pipe group is connected to the ground source side inlet of the first ground source heat pump unit through pipelines, forming the first independent circulation loop; The ground source side outlet of the second ground source heat pump unit is connected to the second ground source circulating water pump and the second ground source control valve in sequence through pipelines; the outlet of the second ground source control valve is connected to the inlet of the first underground pipe group and the inlet of the second underground pipe group respectively through pipelines; the outlet of the first underground pipe group and the outlet of the second underground pipe group are connected to the ground source side inlet of the second ground source heat pump unit after being merged through pipelines, forming a composite circulation loop; The first underground pipe group and the second underground pipe group are respectively equipped with a first pipe group heat meter and a second pipe group heat meter.

4. A heating system coupled with a ground source heat pump and solar energy according to claim 3, characterized in that, The heat storage module includes: Hot water storage tank, first thermal storage control valve, second thermal storage control valve, phase change thermal storage tank and thermal storage circulating water pump; The hot water storage tank is connected in sequence to the heat storage circulating water pump, the first heat storage control valve, the first underground pipe group, and the second heat storage control valve through pipelines to form a heat storage circulation loop. The phase change heat storage tank is connected to the outlet end of the solar collector and the condenser side of the ground source heat pump module through bidirectional pipelines.

5. A heating system coupled with a ground source heat pump and solar energy according to claim 4, characterized in that, The first underground pipe group adopts a series-parallel hybrid structure, consisting of multiple groups of underground pipes connected in parallel and then in series. During heat storage, hot water flows from the internal underground pipe group to the outside, and during heat extraction, the flow direction is reversed. The second underground pipe group adopts a fully parallel structure, and each underground pipe branch is equipped with a flow balancing valve.

6. A heating system coupled with a ground source heat pump and solar energy according to claim 4, characterized in that, The phase change heat storage tank is filled with composite phase change material, and the pipeline switching between the solar collector module, the ground source heat pump module, and the building terminal module is realized through an electric ball valve.

7. A heating system coupled with a ground source heat pump and solar energy according to claim 1, characterized in that, The hot water storage tank is equipped with a domestic hot water heat exchange coil, which is connected to the interior of the building via pipelines. A tap water supply valve is installed at the inlet end of the domestic hot water heat exchange coil.

8. A heating system coupled with a ground source heat pump and solar energy according to claim 3, characterized in that, The building terminal module includes: The system comprises a first building terminal device, a second building terminal device, a first terminal circulating water pump, a second terminal circulating water pump, a first terminal control valve, a second terminal control valve, a third terminal control valve, and a fourth terminal control valve. The user-side water supply inlet of the first ground source heat pump unit is connected to the water supply inlet of the first building terminal device through the first user water supply main pipe. The user-side water supply inlet of the second ground source heat pump unit is connected to the water supply inlet of the second building terminal device through the second user water supply main pipe; The return water inlet of the first building terminal device is connected to the user-side return water inlet of the first ground source heat pump unit via the first user return water main pipe, the fourth terminal control valve and the first terminal circulating water pump in sequence. The return water inlet of the second building terminal device is connected to the user-side return water inlet of the second ground source heat pump unit via the second user return water main pipe, the third terminal control valve and the second terminal circulating water pump in sequence; A first bypass pipeline is provided between the first user water supply main and the second user water supply main, and the first terminal control valve is provided on the first bypass pipeline. A second bypass pipeline is provided between the first user return water main and the second user return water main, and a second end control valve is provided on the second bypass pipeline.

9. A heating system coupled with a ground source heat pump and solar energy according to claim 8, characterized in that, The solar collector module and the building terminal module form a direct heating loop, which includes a solar heating circulating water pump, a first solar heating control valve, a second solar heating control valve, and a pressure control valve. The hot water outlet of the hot water storage tank flows back to the hot water storage tank in sequence through the solar heating circulating water pump, the first solar heating control valve, the first building terminal device, the second solar heating control valve, and the pressure control valve.

10. A heating system coupled with a ground source heat pump and solar energy according to claim 8, characterized in that, The intelligent control module includes a controller, multiple temperature sensors, multiple flow sensors, and multiple pressure sensors; Each temperature sensor is installed at the water outlet of the solar collector, the water inlet of the heat storage module, and inside the phase change heat storage tank. Each flow sensor is installed in the solar thermal collector circulation loop, the water supply pipeline from the hot water storage tank to the end of the building, and the ground source side circulation loop of the ground source heat pump. Each pressure sensor is installed at the collector outlet, the inlet and outlet of the hot water storage tank, the ground source side of the ground source heat pump unit, and the user side, respectively. The controller's inputs are connected to each temperature sensor, each flow sensor, and each pressure sensor, respectively, and the controller's outputs are connected to the solar thermal collector module and the building terminal module, respectively.

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