Multi-energy combined phase change energy storage heat pump system

Abstract

A multi-energy combined phase change energy storage heat pump system comprises a heat pump unit, a phase change heat storage tank, an ice storage tank, a solar heat collector, a ground source tube well, a central heat exchanger, a cold supply heat exchanger and the like, comprehensively utilizes solar energy and geothermal energy, reduces consumption of traditional energy to the maximum extent, reduces greenhouse gas emission, conforms to the concept of sustainable development, and has a wide application prospect. According to the change of seasons and energy demands, multiple operation modes are provided, and the adaptability of the system is improved; through introduction of phase change energy storage, the social peak-valley electricity consumption difference can be remarkably adjusted, the peak electricity consumption pressure is relieved, energy consumption during electricity storage is avoided, and the energy utilization rate is increased. And meanwhile, through application of geothermal energy, the heating and refrigerating cycle efficiency of the unit is improved, electric energy consumption is reduced, greenhouse gas emission is reduced, implementation of the dual-carbon policy is promoted, the application range of the ground source heat pump is expanded, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the field of heating and cooling systems, and in particular to a multi-energy combined phase-change energy storage heat pump system. Background Art

[0002] With the continuous development of renewable energy technology, solar energy, as a clean energy, has gradually been widely used in the fields of heating and cooling; at the same time, there is a huge difference in peak and valley electricity consumption in society, and the demand for electricity is high during peak periods. As the demand for air conditioning in society increases, the load on the power grid continues to grow, and the contradiction between electricity supply and demand becomes increasingly prominent.

[0003] Traditional heat pump systems have certain limitations in energy utilization and storage, while phase change energy storage technology can effectively store and release heat. The present invention combines multiple thermal energy storage and conversion units to form an efficient and flexible energy management system that can cope with changes in different seasons and energy demand. In this context, it is urgent to accelerate energy transformation, develop clean energy, and promote energy system storage technology.

[0004] As the world's largest renewable clean energy, solar energy has good economic and environmental friendliness. However, solar energy resources are affected by meteorological conditions and have disadvantages such as intermittency and instability. The heat pump system has high performance; phase change thermal storage has the advantages of constant temperature, large heat storage density, small volume change, and good stability. It is increasingly widely used in the field of heating; ice storage can improve ice storage efficiency by adding nucleating additives. The ice storage tank has a small volume and a large cold storage density. Phase change energy storage absorbs energy from the surrounding environment during its phase change process, and releases energy to the surrounding environment when needed to achieve the purpose of energy storage and control the temperature of the surrounding environment, which can solve the contradiction between energy supply and demand in time and space. However, the existing energy storage technology mostly uses air source heat pump systems, which have high energy consumption and are very effective in utilizing solar energy, resulting in energy waste and low energy utilization. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-energy combined phase change energy storage heat pump system, which comprehensively utilizes solar energy and geothermal energy to achieve energy storage and utilization of thermal energy and improve energy utilization rate.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a multi-energy combined phase change energy storage heat pump system, including a heat pump unit, a phase change heat storage tank, an ice storage tank, a solar collector, a ground source pipe well, a central heat exchanger and a cooling heat exchanger, the water outlet of the solar collector is connected to the inlet of the first heat exchange channel of the central heat exchanger, the water inlet of the solar collector is connected to the outlet of the heat collection side water pump, and the inlet of the heat collection side water pump is also connected to the outlet of the first heat exchange channel of the central heat exchanger; The first port of the phase change heat storage tank is connected to the outlet of the second heat exchange channel of the central heat exchanger, the second port of the phase change heat storage tank is connected to the inlet of the heat storage side water pump, the outlet of the heat storage side water pump is also connected to the inlet of the second heat exchange channel of the central heat exchanger, and the inlet and outlet of the heat storage side water pump are also respectively connected to the two sides of the first bypass valve; The first port of the phase change heat storage tank and the outlet of the second heat exchange channel of the central heat exchanger are also respectively connected to the inlet of the user-side water pump, the outlet of the user-side water pump is connected to the inlet of the user's heating pipe, and the outlet of the user's heating pipe is respectively connected to the second port of the phase change heat storage tank and the inlet of the heat storage side water pump; The condensing side outlet of the heat pump unit is connected to the heat source pipeline inlet of the ground source pipe well, the heat source pipeline outlet of the ground source pipe well is connected to the inlet of the ground source water side pump, and the outlet of the ground source water side pump is connected to the condensing side inlet of the heat pump unit; The evaporation side inlet of the heat pump unit is connected to the outlet of the third heat exchange channel of the central heat exchanger, the evaporation side outlet of the heat pump unit is connected to the inlet of the first phase change medium pump, and the outlet of the first phase change medium pump is connected to the inlet of the third heat exchange channel of the central heat exchanger; The evaporation side outlet of the heat pump unit is also connected to one end of the electric regulating valve V1 and the electric regulating valve V2 respectively, the other end of the electric regulating valve V1 is connected to the first port of the ice storage tank, the second port of the ice storage tank is connected to one end of the electric regulating valve V3 and the electric regulating valve V4 respectively, the other end of the electric regulating valve V3 is connected to the inlet of the second phase change medium pump, the outlet of the second phase change medium pump is connected to the evaporation side inlet of the heat pump unit, the other ends of the electric regulating valve V2 and the electric regulating valve V4 are respectively connected to the inlet of the first heat exchange channel of the cooling heat exchanger, the outlet of the first heat exchange channel of the cooling heat exchanger is connected to the inlet of the second phase change medium pump, the inlet of the second heat exchange channel of the cooling heat exchanger is connected to the outlet of the user's cooling pipeline, the outlet of the second heat exchange channel of the cooling heat exchanger is connected to the inlet of the cooling water pump side, and the outlet of the cooling water pump side is connected to the inlet of the user's cooling pipeline; The system is also connected to a controller or an external control system, which can automatically control or manually control the operation mode of the system, including daytime heat storage mode, daytime heating mode, nighttime heating / heat storage coordinated mode, cooling mode, cooling / cooling storage coordinated mode, ice storage tank cooling mode and combined cooling mode; When the system is in the daytime heat storage mode, the water pump on the heat collection side and the water pump on the heat storage side continue to operate, and the first bypass valve is closed, so that the phase change heat storage tank is heated by the solar collector; When the system is in daytime heating mode, the collector-side water pump and the user-side water pump continue to operate, and the controller controls the opening of the first bypass valve, thereby providing heating to the user through the solar collector and the phase change heat storage tank; When the system is in the nighttime heating / heat storage coordinated mode, the heat pump unit, the first phase change medium pump, the ground source water side pump, the user side water pump and the heat storage side water pump are all in continuous operation, and the first bypass valve is closed, so that the heat pump unit transfers the heat from the ground source pipe well to the central heat exchanger, and heats the phase change heat storage tank and the user at the same time through the central heat exchanger; When the system is in cold storage mode, the heat pump unit, the ground source water side pump and the second phase change medium pump are in continuous operation, the electric regulating valve V1 and the electric regulating valve V3 are opened, and the electric regulating valve V2 and the electric regulating valve V4 are closed, so that the ice storage tank is cooled through the evaporation side of the heat pump unit, and the heat is transferred to the ground source pipe well through the condensation side of the heat pump unit; When the system is in the cooling / cold storage coordinated mode, the heat pump unit, the ground source water side pump, the second phase change medium pump and the cooling water pump side are in continuous operation, the electric regulating valves V1, V2 and V3 are opened, and the electric regulating valve V4 is closed, so that the ice storage tank and the cooling heat exchanger are cooled simultaneously through the evaporation side of the heat pump unit, so as to cool the user through the cooling heat exchanger, and transfer the heat to the ground source pipe well through the condensation side of the heat pump unit; When the system is in the ice storage tank cooling mode, the second phase change medium pump and the cooling water pump side are continuously running, the electric regulating valve V1 and the electric regulating valve V4 are opened, and the electric regulating valve V2 and the electric regulating valve V3 are closed, so that the cooling heat exchanger is cooled by the ice storage tank, so as to provide cooling to the user through the cooling heat exchanger; When the system is in the combined cooling mode, the heat pump unit, the ground source water side pump, the second phase change medium pump and the cooling water pump side continue to operate, the electric regulating valve V3 is closed, the electric regulating valve V4 is opened, and the controller controls the opening of the electric regulating valve V1 and the electric regulating valve V2, so that the cooling heat exchanger is cooled by the evaporation side and the ice storage tank of the heat pump unit at the same time, so as to provide cooling to the user through the cooling heat exchanger, and transfer heat to the ground source pipe well through the condensation side of the heat pump unit.

[0007] Preferably, the first phase-change medium pump and the second phase-change medium pump are both ethylene glycol pumps.

[0008] Preferably, the condensing side outlet of the heat pump unit is connected to the inlet of the first heat exchange channel of the feed water heat exchanger, the outlet of the first heat exchange channel of the feed water heat exchanger is connected to the inlet of the heat source pipeline of the ground source pipe well, the inlet of the second heat exchange channel of the feed water heat exchanger is connected to the outlet of the electric regulating valve V5 and the feed water pump in sequence, the inlet of the feed water pump is connected to the external water source, the outlet of the second heat exchange channel of the feed water heat exchanger is connected to the water inlet of the solar collector, the water outlet of the solar collector is connected to the domestic hot water pipeline, and the inlet and outlet of the second heat exchange channel of the feed water heat exchanger are also respectively connected to the two sides of the second bypass valve; When the water supply pump is running continuously, the electric regulating valve V5 is opened, and the controller controls the opening of the second bypass valve, so as to use the heat of the ground source pipe well to heat the water supply from the external water source, so that the solar collector can use the water supply to transport hot water to the domestic hot water pipeline.

[0009] According to the above technical solution, the beneficial effects of the present invention are: The present invention makes comprehensive use of solar energy and geothermal energy to minimize the consumption of traditional energy and reduce greenhouse gas emissions, which is in line with the concept of sustainable development. It has multiple operating modes according to the changes in seasons and energy demand, which improves the adaptability of the system. Through the introduction of phase change energy storage, it can significantly adjust the difference in social peak and valley electricity consumption, alleviate the pressure of peak electricity consumption, avoid energy consumption during electricity storage, and improve energy utilization. At the same time, through the application of geothermal energy, the heating and refrigeration cycle efficiency of the unit is improved, the electricity consumption is reduced, the greenhouse gas emissions are reduced, the implementation of the dual-carbon policy is promoted, the application scope of ground source heat pumps is expanded, and the energy utilization rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the system principle of the present invention; Figure 2 This is a schematic diagram of the daytime heat storage mode; Figure 3 This is a schematic diagram of the daytime heating mode; Figure 4 Schematic diagram of nighttime heating / heat storage synergistic mode; Figure 5 is a schematic diagram of the cold storage mode; Figure 6 This is a schematic diagram of the cooling / cold storage coordinated mode; Figure 7 Schematic diagram of the cooling mode for the ice storage tank; Figure 8 Schematic diagram of the combined cooling mode.

[0011] Markings in the figure: 1. heat pump unit, 2. phase change heat storage tank, 3. ice storage tank, 4. solar collector, 5. cooling heat exchanger, 6. water supply heat exchanger, 7. first phase change medium pump, 8. second phase change medium pump, 9. ground source pipe well, 10. central heat exchanger, 11. ground source water side pump, 12. second bypass valve, 13. user side water pump, 14. heat storage side water pump, 15. cooling water pump side, 16. collector side water pump, 17. water supply pump, 18. first bypass valve.

[0012] V1, V2, V3, V4 and V5 are all electric regulating valves. DETAILED DESCRIPTION

[0013] With reference to the accompanying drawings, the specific implementation is as follows: like Figure 1 As shown, a multi-energy combined phase change energy storage heat pump system includes a heat pump unit 1, a phase change heat storage tank 2, an ice storage tank 3, a solar collector 4, a ground source pipe well 9, a central heat exchanger 10 and a cooling heat exchanger 5. The water outlet of the solar collector 4 is connected to the inlet of the first heat exchange channel of the central heat exchanger 10, the water inlet of the solar collector 4 is connected to the outlet of the heat collection side water pump 16, and the inlet of the heat collection side water pump 16 is also connected to the outlet of the first heat exchange channel of the central heat exchanger 10.

[0014] like Figure 1 As shown, the first port of the phase change heat storage tank 2 is connected to the outlet of the second heat exchange channel of the central heat exchanger 10, the second port of the phase change heat storage tank 2 is connected to the inlet of the heat storage side water pump 14, the outlet of the heat storage side water pump 14 is also connected to the inlet of the second heat exchange channel of the central heat exchanger 10, and the inlet and outlet of the heat storage side water pump 14 are also connected to the two sides of the first bypass valve 18 respectively.

[0015] like Figure 1 As shown, the first port of the phase change heat storage tank 2 and the outlet of the second heat exchange channel of the central heat exchanger 10 are also respectively connected to the inlet of the user-side water pump 13, the outlet of the user-side water pump 13 is connected to the inlet of the user's heating pipe, and the outlet of the user's heating pipe is respectively connected to the second port of the phase change heat storage tank 2 and the inlet of the heat storage side water pump 14.

[0016] like Figure 1 As shown, the condensing side outlet of the heat pump unit 1 is connected to the heat source pipeline inlet of the ground source pipe well 9, the heat source pipeline outlet of the ground source pipe well 9 is connected to the inlet of the ground source water side pump 11, and the outlet of the ground source water side pump 11 is connected to the condensing side inlet of the heat pump unit 1.

[0017] like Figure 1 As shown, the evaporation side inlet of the heat pump unit 1 is connected to the outlet of the third heat exchange channel of the central heat exchanger 10, the evaporation side outlet of the heat pump unit 1 is connected to the inlet of the first phase change medium pump 7, and the outlet of the first phase change medium pump 7 is connected to the inlet of the third heat exchange channel of the central heat exchanger 10.

[0018] like Figure 1 As shown, the evaporation side outlet of the heat pump unit 1 is also connected to one end of the electric regulating valve V1 and the electric regulating valve V2 respectively, the other end of the electric regulating valve V1 is connected to the first port of the ice storage tank 3, the second port of the ice storage tank 3 is connected to one end of the electric regulating valve V3 and the electric regulating valve V4 respectively, the other end of the electric regulating valve V3 is connected to the inlet of the second phase change medium pump 8, and the outlet of the second phase change medium pump 8 is connected to the evaporation side inlet of the heat pump unit 1. In this embodiment, the first phase change medium pump 7 and the second phase change medium pump 8 are both ethylene glycol pumps.

[0019] like Figure 1As shown, the other ends of the electric regulating valve V2 and the electric regulating valve V4 are respectively connected to the inlet of the first heat exchange channel of the cooling heat exchanger 5, the outlet of the first heat exchange channel of the cooling heat exchanger 5 is connected to the inlet of the second phase change medium pump 8, the inlet of the second heat exchange channel of the cooling heat exchanger 5 is connected to the outlet of the user's cooling pipe, the outlet of the second heat exchange channel of the cooling heat exchanger 5 is connected to the inlet of the cooling water pump side 15, and the outlet of the cooling water pump side 15 is connected to the inlet of the user's cooling pipe.

[0020] like Figure 1 As shown, the condensing side outlet of the heat pump unit 1 is connected to the inlet of the first heat exchange channel of the make-up water heat exchanger 6, the outlet of the first heat exchange channel of the make-up water heat exchanger 6 is connected to the inlet of the heat source pipeline of the ground source pipe well 9, the inlet of the second heat exchange channel of the make-up water heat exchanger 6 is connected to the outlets of the electric regulating valve V5 and the make-up water pump 17 in sequence, the inlet of the make-up water pump 17 is connected to the external water source, the outlet of the second heat exchange channel of the make-up water heat exchanger 6 is connected to the water inlet of the solar collector 4, the water outlet of the solar collector 4 is connected to the domestic hot water pipeline, and the inlet and outlet of the second heat exchange channel of the make-up water heat exchanger 6 are also respectively connected to the two sides of the second bypass valve 12.

[0021] The system of this embodiment is also connected to a controller or an external control system, which can automatically control or manually control the operating mode of the system, including daytime heat storage mode, daytime heating mode, nighttime heating / heat storage coordinated mode, cold storage mode, cold supply / cold storage coordinated mode, ice storage tank cooling mode and combined cooling mode.

[0022] like Figure 2 As shown, at this time, the system is in the daytime heat storage mode, the heat collection side water pump 16 and the heat storage side water pump 14 continue to operate, and the first bypass valve 18 is closed, so that the phase change heat storage tank 2 is heated by the solar collector 4.

[0023] like Figure 3 As shown, at this time, the system is in the daytime heating mode, the collector-side water pump 16 and the user-side water pump 13 continue to operate, and the controller controls the opening of the first bypass valve 18, so that the user is heated by the solar collector 4 and the phase-change heat storage tank 2. The larger the opening of the first bypass valve 18, the greater the proportion of heat provided by the solar collector 4, and vice versa, the smaller the opening of the first bypass valve 18, the greater the proportion of heat provided by the phase-change heat storage tank 2.

[0024] like Figure 4As shown, at this time, the system is in the nighttime heating / heat storage coordinated mode, the heat pump unit 1, the first phase change medium pump 7, the ground source water side pump 11, the user side water pump 13 and the heat storage side water pump 14 are all running continuously, and the first bypass valve 18 is closed, so that the heat pump unit 1 transfers the heat of the ground source pipe well 9 to the central heat exchanger 10, and heats the phase change heat storage tank 2 and the user at the same time through the central heat exchanger 10.

[0025] like Figure 5 As shown, at this time, the system is in the cold storage mode, the heat pump unit 1, the ground source water side pump 11 and the second phase change medium pump 8 continue to operate, the electric regulating valve V1 and the electric regulating valve V3 are opened, and the electric regulating valve V2 and the electric regulating valve V4 are closed, so that the ice storage tank 3 is cooled through the evaporation side of the heat pump unit 1, and the heat is transferred to the ground source pipe well 9 through the condensation side of the heat pump unit 1.

[0026] like Figure 6 As shown, at this time, the system is in the cooling / cold storage coordinated mode, the heat pump unit 1, the ground source water side pump 11, the second phase change medium pump 8 and the cooling water pump side 15 continue to operate, the electric regulating valve V1, the electric regulating valve V2 and the electric regulating valve V3 are opened, and the electric regulating valve V4 is closed, so that the ice storage tank 3 and the cooling heat exchanger 5 are cooled simultaneously through the evaporation side of the heat pump unit 1, so as to provide cooling to the user through the cooling heat exchanger 5, and transfer heat to the ground source pipe well 9 through the condensation side of the heat pump unit 1.

[0027] like Figure 7 As shown, at this time, the system is in the ice storage tank cooling mode, the second phase change medium pump 8 and the cooling water pump side 15 continue to operate, the electric regulating valve V1 and the electric regulating valve V4 are opened, and the electric regulating valve V2 and the electric regulating valve V3 are closed, so that the cooling heat exchanger 5 is cooled by the ice storage tank 3, so as to provide cooling to the user through the cooling heat exchanger 5.

[0028] like Figure 8 As shown, at this time, the system is in the joint cooling mode, the heat pump unit 1, the ground source water side pump 11, the second phase change medium pump 8 and the cooling water pump side 15 are continuously running, the electric regulating valve V3 is closed, the electric regulating valve V4 is opened, and the controller controls the opening of the electric regulating valve V1 and the electric regulating valve V2, so that the cooling heat exchanger 5 is cooled by the evaporation side of the heat pump unit 1 and the ice storage tank 3 at the same time, so as to provide cooling to the user through the cooling heat exchanger 5, and transfer heat to the ground source pipe well 9 through the condensation side of the heat pump unit 1. The smaller the opening of the electric regulating valve V1 and the larger the opening of the electric regulating valve V2, the greater the proportion of cooling provided by the heat pump unit 1, and vice versa, the larger the opening of the electric regulating valve V1 and the smaller the opening of the electric regulating valve V2, the greater the proportion of cooling provided by the ice storage tank 3.

[0029] like Figure 8As shown, when the make-up water pump 17 is running continuously, the electric regulating valve V5 is opened, and the controller controls the opening of the second bypass valve 12, so that the heat of the ground source pipe well 9 is used to heat the make-up water of the external water source. At this time, the solar collector 4 can use the make-up water to transport hot water to the domestic hot water pipeline, improve the performance of the unit, and balance the geothermal energy.

Claims

1. A multi-energy combined phase change energy storage heat pump system, characterized in that: The invention comprises a heat pump unit (1), a phase change heat storage tank (2), an ice storage tank (3), a solar collector (4), a ground source pipe well (9), a central heat exchanger (10) and a cooling heat exchanger (5); the water outlet of the solar collector (4) is connected to the inlet of a first heat exchange channel of the central heat exchanger (10); the water inlet of the solar collector (4) is connected to the outlet of a heat collection side water pump (16); and the inlet of the heat collection side water pump (16) is also connected to the outlet of the first heat exchange channel of the central heat exchanger (10); The first port of the phase-change heat storage tank (2) is connected to the outlet of the second heat exchange channel of the central heat exchanger (10), the second port of the phase-change heat storage tank (2) is connected to the inlet of the heat storage side water pump (14), the outlet of the heat storage side water pump (14) is also connected to the inlet of the second heat exchange channel of the central heat exchanger (10), and the inlet and outlet of the heat storage side water pump (14) are also respectively connected to the two sides of the first bypass valve (18); The first opening of the phase-change heat storage tank (2) and the outlet of the second heat exchange channel of the central heat exchanger (10) are also respectively connected to the inlet of the user-side water pump (13); the outlet of the user-side water pump (13) is connected to the inlet of the user's heating pipeline; the outlet of the user's heating pipeline is respectively connected to the second opening of the phase-change heat storage tank (2) and the inlet of the heat storage-side water pump (14); The condensing side outlet of the heat pump unit (1) is connected to the heat source pipeline inlet of the ground source pipe well (9), the heat source pipeline outlet of the ground source pipe well (9) is connected to the inlet of the ground source water side pump (11), and the outlet of the ground source water side pump (11) is connected to the condensing side inlet of the heat pump unit (1); The evaporation side inlet of the heat pump unit (1) is connected to the outlet of the third heat exchange channel of the central heat exchanger (10), the evaporation side outlet of the heat pump unit (1) is connected to the inlet of the first phase change medium pump (7), and the outlet of the first phase change medium pump (7) is connected to the inlet of the third heat exchange channel of the central heat exchanger (10); The evaporation side outlet of the heat pump unit (1) is also connected to one end of the electric regulating valve V1 and the electric regulating valve V2 respectively; the other end of the electric regulating valve V1 is connected to the first port of the ice storage tank (3); the second port of the ice storage tank (3) is connected to one end of the electric regulating valve V3 and the electric regulating valve V4 respectively; the other end of the electric regulating valve V3 is connected to the inlet of the second phase change medium pump (8); the outlet of the second phase change medium pump (8) is connected to the evaporation side inlet of the heat pump unit (1); ... 2 and the other end of the electric regulating valve V4 are respectively connected to the inlet of the first heat exchange channel of the cooling heat exchanger (5), the outlet of the first heat exchange channel of the cooling heat exchanger (5) is connected to the inlet of the second phase change medium pump (8), the inlet of the second heat exchange channel of the cooling heat exchanger (5) is connected to the outlet of the user's cooling pipe, the outlet of the second heat exchange channel of the cooling heat exchanger (5) is connected to the inlet of the cooling water pump side (15), and the outlet of the cooling water pump side (15) is connected to the inlet of the user's cooling pipe; The system is also connected to a controller or an external control system, which can automatically control or manually control the operation mode of the system, including daytime heat storage mode, daytime heating mode, nighttime heating / heat storage coordinated mode, cooling mode, cooling / cooling storage coordinated mode, ice storage tank cooling mode and combined cooling mode; When the system is in the daytime heat storage mode, the heat collection side water pump (16) and the heat storage side water pump (14) continue to operate, and the first bypass valve (18) is closed, so that the phase change heat storage tank (2) is heated by the solar collector (4); When the system is in daytime heating mode, the collector-side water pump (16) and the user-side water pump (13) continue to operate, and the controller controls the opening of the first bypass valve (18), thereby providing heating to the user through the solar collector (4) and the phase change heat storage tank (2); When the system is in the nighttime heating / heat storage coordinated mode, the heat pump unit (1), the first phase change medium pump (7), the ground source water side pump (11), the user side water pump (13) and the heat storage side water pump (14) all operate continuously, and the first bypass valve (18) is closed, so that the heat pump unit (1) transfers the heat of the ground source pipe well (9) to the central heat exchanger (10), and heats the phase change heat storage tank (2) and the user at the same time through the central heat exchanger (10); When the system is in the cold storage mode, the heat pump unit (1), the ground source water side pump (11) and the second phase change medium pump (8) are in continuous operation, the electric regulating valve V1 and the electric regulating valve V3 are opened, and the electric regulating valve V2 and the electric regulating valve V4 are closed, thereby supplying cold to the ice storage tank (3) through the evaporation side of the heat pump unit (1), and transferring heat to the ground source pipe well (9) through the condensation side of the heat pump unit (1); When the system is in the cooling / cold storage coordinated mode, the heat pump unit (1), the ground source water side pump (11), the second phase change medium pump (8) and the cooling water pump side (15) are continuously operated, the electric regulating valve V1, the electric regulating valve V2 and the electric regulating valve V3 are opened, and the electric regulating valve V4 is closed, so that the ice storage tank (3) and the cooling heat exchanger (5) are cooled simultaneously through the evaporation side of the heat pump unit (1), so that the user is cooled through the cooling heat exchanger (5), and the heat is transferred to the ground source pipe well (9) through the condensation side of the heat pump unit (1); When the system is in the ice storage tank cooling mode, the second phase change medium pump (8) and the cooling water pump side (15) continue to operate, the electric regulating valve V1 and the electric regulating valve V4 are opened, and the electric regulating valve V2 and the electric regulating valve V3 are closed, thereby supplying cooling to the cooling heat exchanger (5) through the ice storage tank (3), so as to facilitate cooling to the user through the cooling heat exchanger (5); When the system is in the combined cooling mode, the heat pump unit (1), the ground source water side pump (11), the second phase change medium pump (8) and the cooling water pump side (15) continue to operate, the electric regulating valve V3 is closed, the electric regulating valve V4 is opened, and the controller controls the opening of the electric regulating valve V1 and the electric regulating valve V2, so that the cooling heat exchanger (5) is cooled simultaneously through the evaporation side of the heat pump unit (1) and the ice storage tank (3), so as to provide cooling to the user through the cooling heat exchanger (5), and transfer heat to the ground source pipe well (9) through the condensation side of the heat pump unit (1).

2. A multi-energy combined phase change energy storage heat pump system according to claim 1, characterized in that: The first phase-change medium pump (7) and the second phase-change medium pump (8) are both ethylene glycol pumps.

3. A multi-energy combined phase change energy storage heat pump system according to claim 1, characterized in that: The condensing side outlet of the heat pump unit (1) is connected to the inlet of the first heat exchange channel of the feed water heat exchanger (6), the outlet of the first heat exchange channel of the feed water heat exchanger (6) is connected to the inlet of the heat source pipeline of the ground source pipe well (9), the inlet of the second heat exchange channel of the feed water heat exchanger (6) is connected to the outlets of the electric regulating valve V5 and the feed water pump (17) in sequence, the inlet of the feed water pump (17) is connected to an external water source, the outlet of the second heat exchange channel of the feed water heat exchanger (6) is connected to the water inlet of the solar collector (4), the water outlet of the solar collector (4) is connected to the domestic hot water pipeline, and the inlet and outlet of the second heat exchange channel of the feed water heat exchanger (6) are also respectively connected to the two sides of the second bypass valve (12); When the water supply pump (17) is continuously running, the electric regulating valve V5 is opened, and the controller controls the opening of the second bypass valve (12), thereby utilizing the heat of the ground source pipe well (9) to heat the water supply from the external water source, so that the solar collector (4) can utilize the water supply to transport hot water to the domestic hot water pipeline.

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