Heat and cold electricity and water combined supply system for coupling shallow geothermal energy with air energy and solar energy

Abstract

The invention belongs to the technical field of comprehensive utilization of energy, and relates to a shallow geothermal energy coupling air energy and solar energy heat and cold electricity and water combined supply system which comprises a solar energy unit, a geothermal energy unit, a heat storage unit, an air energy adjusting unit and a hot water supply unit. Excess heat generated by the solar unit is stored to the buried pipe group through the second plate type heat exchanger, active heat compensation of underground soil is achieved, heat deficiency is compensated, and ground temperature balance is maintained. Meanwhile, the low-temperature air source heat pump unit can supply heat independently or cooperatively with the ground source heat pump unit for cooperative heat supply; the heat taking load and the operation pressure of the ground source heat pump unit are reduced, gradient utilization of air energy and solar energy is achieved in combination with the hot water supply unit, clean and efficient integrated supply of heat, cold, electricity and water in areas with unbalanced cold and heat loads is achieved, the operation energy efficiency of the ground source heat pump unit is remarkably improved, and long-term stable operation of the system is guaranteed. And finally, the comprehensive performance of the whole cooperative system is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of comprehensive energy utilization technology and relates to a combined heat, cooling, electricity and water supply system that couples shallow geothermal energy with air energy and solar energy. Background Technology

[0002] With the deepening of the concept of energy conservation and emission reduction and the rapid development of renewable energy utilization technologies, the demand for clean, efficient, and diversified energy supply models in the field of integrated building energy supply is becoming increasingly urgent. Shallow geothermal energy, as a clean energy source with abundant reserves, wide distribution, and renewable energy, combined with solar energy to form a combined heat, cooling, electricity, and water supply system, has become an important development direction in the field of building energy conservation due to its advantage of integrating building heating, cooling, hot water supply, and power supply. Shallow geothermal energy provides stable heating and cooling for buildings, with ground source heat pumps as its core equipment; solar energy mainly undertakes the functions of hot water supply and power supply, and can operate in conjunction with ground source heat pumps, with photovoltaic thermal modules as its core equipment.

[0003] Currently, when ground source heat pumps and photovoltaic thermal modules work together, the heat generated by the photovoltaic thermal modules in winter preheats the geothermal water through a heat exchanger, raising the temperature of the geothermal water before it enters the ground source heat pump, where it is further heated to provide heating for the building. In summer, the electricity generated by the photovoltaic thermal modules is fed into the power grid, and the ground source heat pump releases heat from the building into the ground to achieve cooling.

[0004] However, in areas with uneven heating and cooling loads, the demand for building heating is high in winter and low in summer. This results in the ground source heat pump system extracting much more heat from the shallow soil in winter than it releases into the soil in summer. In areas where the summer cooling load is much lower than the winter heating load, long-term operation can lead to a continuous drop in the underground soil temperature, disrupting the geothermal balance, significantly reducing the operating efficiency of the ground source heat pump unit, affecting the long-term stable operation of the system, and ultimately severely restricting the overall performance of the entire synergistic system. Summary of the Invention

[0005] The purpose of this invention is to provide a combined heat, cooling, electricity and water supply system that couples shallow geothermal energy with air energy and solar energy, which can adapt to the demand for high heating in winter and low cooling in summer in areas with uneven heating and cooling loads, realize the clean and efficient integrated supply of heat, cooling, electricity and water for buildings in such areas, ensure the long-term stable operation of the system and improve the energy efficiency of the unit.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows: A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, electricity and water supply system includes a solar energy unit and a geothermal energy unit. The solar energy unit includes a photovoltaic thermal module, a first plate heat exchanger and a heating water tank connected in sequence. The geothermal energy unit includes a group of buried pipes and at least one ground source heat pump unit connected in sequence. The system also includes: The heat storage unit includes a second plate heat exchanger, which is connected to the heating water tank and the underground pipe group respectively. The second plate heat exchanger is used to exchange heat between the hot water in the heating water tank and the geothermal water in the underground pipe group, so that the geothermal water temperature rises and is stored in the underground pipe group for heat storage. Air source heat pump units include low-temperature air source heat pump units, which are used alone or in conjunction with ground source heat pump units to supply heat to users; The hot water supply unit includes a low-temperature air source hot water unit and a hot water storage tank connected in sequence. The hot water storage tank is connected to a heating water tank. Hot water in the heating water tank enters the hot water storage tank for storage. The low-temperature air source hot water unit uses air energy to improve the quality of the hot water in the hot water storage tank and then supplies hot water to users.

[0007] The invention is further characterized by: The outlet of the buried pipe group is connected to the first inlet of the third plate heat exchanger, the first outlet of the third plate heat exchanger is connected to the inlet of the buried pipe group, and the second inlet and second outlet of the third plate heat exchanger are connected to the user side.

[0008] The underground pipe group is equipped with a water collector at its outlet and a water distributor at its inlet. The outlet of the water collector is connected to the first inlet of the ground source heat pump unit, the first inlet of the second plate heat exchanger, and the first inlet of the third plate heat exchanger, respectively. The inlet of the water distributor is connected to the first outlet of the ground source heat pump unit, the first outlet of the second plate heat exchanger, and the first outlet of the third plate heat exchanger, respectively.

[0009] The outlet of the water collector is connected to the first inlet of the ground source heat pump unit, the first inlet of the second plate heat exchanger, and the first inlet of the third plate heat exchanger via a first circulation pump. The second inlet of the ground source heat pump unit, the inlet of the low-temperature air source heat pump unit, and the second inlet of the third plate heat exchanger are connected to the user side via a second circulation pump. The first outlet of the heating water tank is connected to the second inlet of the second plate heat exchanger via a third circulation pump. The outlet of the photovoltaic thermal module is connected to the first inlet of the first plate heat exchanger via at least one fourth circulation pump. The second inlet of the first plate heat exchanger is connected to the second outlet of the heating water tank via a fifth circulation pump. The first outlet of the hot water storage tank is connected to the inlet of the low-temperature air source hot water unit via a sixth circulation pump. The second outlet of the hot water storage tank is connected to the user side via a constant pressure water supply pump.

[0010] The inlet of the second circulation pump is connected to the outlet of the soft water tank via a side-source constant pressure water supply unit, the inlet of the first circulation pump is connected to the outlet of the soft water tank via a ground source side constant pressure water supply unit, and the inlet of the soft water tank is connected to the water source via a water softener.

[0011] The third inlet of the heating water tank is connected to the water source through a silicon phosphate crystal water treatment device.

[0012] The photovoltaic and solar thermal modules are connected to the power grid via an inverter.

[0013] The shallow geothermal energy coupled with air energy and solar energy combined heating, cooling, power and water system of the present invention has the following advantages: This invention stores excess heat generated by the solar energy unit in the buried pipe network through a second plate heat exchanger, achieving active heating of the underground soil, compensating for heat deficits, and maintaining ground temperature balance. At the same time, the low-temperature air source heat pump unit can provide heating independently or in conjunction with the ground source heat pump unit, reducing the heat extraction load and operating pressure of the ground source heat pump unit. Combined with the hot water supply unit, it realizes the cascade utilization of air energy and solar energy, achieving a clean and efficient integrated supply of heat, cooling, electricity, and water in areas with uneven heating and cooling loads. This significantly improves the operating energy efficiency of the ground source heat pump unit, ensures the long-term stable operation of the system, and ultimately greatly enhances the overall performance of the entire collaborative system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the ground source heat pump unit and the low temperature air source heat pump unit in this invention.

[0016] Figure 3 This is a schematic diagram of the structure of the solar energy unit and the thermal storage unit in this invention.

[0017] Figure 4 This is a schematic diagram of the hot water supply unit in this invention.

[0018] Figure 5 This is a schematic diagram of the soft water tank in this invention.

[0019] Figure 6 This is a schematic diagram of the silicon phosphate crystal water treatment device of the present invention.

[0020] Figure label: 1. Underground pipe network; 2. Ground source heat pump unit; 3. Low temperature air source heat pump unit; 4. First circulation pump; 5. Second circulation pump; 6. Third circulation pump; 7. Second plate heat exchanger; 8. Water distributor; 9. Water collector; 10. Water distribution manifold; 11. Photovoltaic thermal module; 12. Low temperature air source hot water unit; 13. Fourth circulation pump; 14. Fifth circulation pump; 15. Sixth circulation pump; 16. Constant pressure water supply pump; 17. First plate heat exchanger; 18. Heating water tank; 19. Hot water storage tank; 20. Soft water tank; 21. Water softener; 22. Ground source side constant pressure water supply unit; 23. User side constant pressure water supply unit; 24. Silicon phosphate crystal water treatment device; 25. Third plate heat exchanger. Detailed Implementation

[0021] The technical solutions of the present invention will now be described clearly and in detail with reference to the accompanying drawings. In the description of the embodiments of the present invention, unless otherwise stated, " / " indicates "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, in the description of the embodiments of the present invention, "multiple" refers to two or more. The terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this invention provides a shallow geothermal energy coupled with air energy and solar energy combined heat, cooling, electricity and water supply system, including a solar energy unit and a geothermal energy unit. The solar energy unit includes a photovoltaic thermal module 11, a first plate heat exchanger 17 and a heating water tank 18 connected in sequence. The geothermal energy unit includes a buried pipe group 1 and at least one ground source heat pump unit 2 connected in sequence. It also includes a heat storage unit, an air energy conditioning unit and a hot water supply unit. The heat storage unit includes a second plate heat exchanger 7, which is connected to the heating water tank 18 and the buried pipe group 1 respectively. The second plate heat exchanger 7 is used to heat the water in the heating water tank 18. Water exchanges heat with the geothermal water in the underground pipe group 1, causing the geothermal water temperature to rise and then be stored in the underground pipe group 1 for heat storage. The air source heat pump unit includes a low-temperature air source heat pump unit 3, which is used to supply heat to users alone or in conjunction with the ground source heat pump unit 2. The hot water supply unit includes a low-temperature air source hot water unit 12 and a hot water storage tank 19 connected in sequence. The hot water storage tank 19 is connected to a heating water tank 18. The hot water in the heating water tank 18 enters the hot water storage tank 19 for storage. The low-temperature air source hot water unit 12 uses air energy to improve the quality of the hot water in the hot water storage tank 19 before supplying hot water to users. This invention stores excess heat generated by the solar energy unit in the buried pipe group 1 through the second plate heat exchanger 7, thereby actively replenishing the underground soil, making up for heat deficits, and maintaining ground temperature balance. At the same time, the low-temperature air source heat pump unit can provide heating independently or in conjunction with the ground source heat pump unit, reducing the heat extraction load and operating pressure of the ground source heat pump unit. Combined with the hot water supply unit, it realizes the cascade utilization of air energy and solar energy, and achieves a clean and efficient integrated supply of heat, cold, electricity and water in areas with uneven heating and cooling loads. This significantly improves the operating energy efficiency of the ground source heat pump unit, ensures the long-term stable operation of the system, and ultimately greatly improves the overall performance of the entire collaborative system.

[0023] like Figure 1 , Figure 2 As shown, the outlet of the buried pipe group 1 is connected to the first inlet of the third plate heat exchanger 25, the first outlet of the third plate heat exchanger 25 is connected to the inlet of the buried pipe group 1, and the second inlet and second outlet of the third plate heat exchanger 25 are connected to the user side. By returning the heat from the user side to the buried pipe group 1, the third plate heat exchanger 25 can effectively maintain the underground soil temperature balance, further avoid ground temperature imbalance, and thus significantly improve the operating energy efficiency of the ground source heat pump unit 2, ensure the long-term stable operation of the system, and greatly improve the overall performance of the entire collaborative system.

[0024] like Figure 1 As shown, a water collector 9 is installed at the outlet of the buried pipe group 1, and a water distributor 8 is installed at the inlet of the buried pipe group 1. The outlet of the water collector 9 is connected to the first inlet of the ground source heat pump unit 2, the first inlet of the second plate heat exchanger 7, and the first inlet of the third plate heat exchanger 25, respectively. The inlet of the water distributor 8 is connected to the first outlet of the ground source heat pump unit 2, the first outlet of the second plate heat exchanger 7, and the first outlet of the third plate heat exchanger 25, respectively.

[0025] like Figure 1 As shown, the outlet of the water collector 9 is connected to the first inlet of the ground source heat pump unit 2, the first inlet of the second plate heat exchanger 7, and the first inlet of the third plate heat exchanger 25 via a first circulation pump 4. The second inlet of the ground source heat pump unit 2, the inlet of the low-temperature air source heat pump unit, and the second inlet of the third plate heat exchanger 25 are connected to the user side via a second circulation pump 5. The first outlet of the heating water tank 18 is connected to the second inlet of the second plate heat exchanger 7 via a third circulation pump 6. The outlet of the photovoltaic thermal module 11 is connected to the first inlet of the first plate heat exchanger 17 via at least one fourth circulation pump 13. The second inlet of the first plate heat exchanger 17 is connected to the second outlet of the heating water tank 18 via a fifth circulation pump 14. The first outlet of the hot water storage tank 19 is connected to the inlet of the low-temperature air source hot water unit 12 via a sixth circulation pump 15. The second outlet of the hot water storage tank 19 is connected to the user side via a constant pressure water supply pump 16.

[0026] like Figure 1 , Figure 5 As shown, the inlet of the second circulating pump 5 is connected to the outlet of the soft water tank 20 via the ground source constant pressure water supply unit 23, and the inlet of the first circulating pump 4 is connected to the outlet of the soft water tank 20 via the ground source constant pressure water supply unit 22. The inlet of the soft water tank 20 is connected to the water source via the water softener 21. Through the setting of the water softener 21, the soft water tank 20 and the two constant pressure water supply units, softened water can be provided to the system and the operating pressure can be stabilized, effectively preventing scale, corrosion and air lock in the pipeline, ensuring the long-term stable operation of each circulation loop, thereby significantly improving the operating energy efficiency of the ground source heat pump unit, ensuring the long-term stable operation of the system, and greatly improving the overall performance of the entire coordinated system.

[0027] like Figure 1 , Figure 6 As shown, the third inlet of the heating water tank 18 is connected to the water source through the silicon phosphate crystal water treatment device 24. By setting the silicon phosphate crystal water treatment device 24 at the water inlet of the heating water tank 18, scaling and corrosion of pipes and equipment can be effectively inhibited, and the heat exchange efficiency and equipment damage caused by water quality problems can be avoided, thereby ensuring the long-term stable operation of the system and improving the overall performance.

[0028] like Figure 1 , Figure 3 As shown, the photovoltaic thermal module 11 is connected to the grid through an inverter, which can connect surplus power to the grid or supply power to the system load, thereby achieving efficient utilization and stable supply of power, improving the system's energy self-sufficiency rate, ensuring long-term stable operation of the system, and significantly improving the overall performance of the entire collaborative system.

[0029] like Figure 1 , Figure 2 As shown, the inlet of the second circulating pump 5 is connected to the load return water pipe on the user side, and the second outlet of the ground source heat pump unit 2 is connected to the load return water pipe on the user side through the manifold 10.

[0030] The load water supply end and the load return end pipelines are connected by a ground source side self-regulating differential pressure bypass valve to form a circulation loop for the ground source heat pump unit 2.

[0031] A heat meter is installed at the first outlet of the ground source heat pump unit 2.

[0032] Working principle: 1) Heating / cooling process of ground source heat pump unit 2: Start the first circulation pump 4, the second circulation pump 5, the ground source heat pump unit 2, the water distributor 8, and the water collector 9. The shallow geothermal energy is stored in the buried pipe group 1. After the first circulation pump 4 is started, the water heated by the shallow geothermal energy in the buried pipe group 1 enters the evaporator side of the ground source heat pump unit 2 through the water collector 9 and the first circulation pump 4, providing heat energy for its evaporation process. The water that has absorbed heat and cooled down flows back to the buried pipe group 1 through the water distributor 8, reabsorbs geothermal heat, and forms a geothermal utilization cycle. The ambient temperature water in the load return water pipe on the user side enters the condenser side of the ground source heat pump unit 2. After being heated by the condenser, it returns to the load supply water pipe on the user side to provide heating for the building. When cooling, the operating mode is switched externally by the ground source heat pump unit 2. After the second circulation pump 5 is started, the chilled water enters the building for heat exchange and cooling. The chilled water after heat exchange flows back to the evaporator side of the ground source heat pump unit 2 to release heat. The first circulation pump 4 starts simultaneously. The ground source side circulating water discharges the heat absorbed from the condenser into the buried pipe group 1 to achieve building cooling.

[0033] 2) Photovoltaic thermal module 11 heat collection process: The fourth circulation pump 13 and the fifth circulation pump 14 are turned on. The photovoltaic thermal module 11 absorbs solar energy and converts it into heat energy to heat the circulating water inside. The heated water is then transported by the fourth circulation pump 13 to the first inlet of the first plate heat exchanger 17, where it transfers heat. After passing through the first plate heat exchanger 17, the water flows back to the photovoltaic thermal module 11 from the first outlet of the first plate heat exchanger 17 to continue heat exchange, forming a photovoltaic thermal heat collection cycle. After absorbing heat, the water in the first plate heat exchanger 17 is transported from its second outlet to the heating water tank 18 for heat storage via the fifth circulation pump 14. Subsequently, it flows back into the first plate heat exchanger 17 from the second inlet to continue heat extraction, completing the heating water tank heat storage cycle. At the same time, the photovoltaic thermal module 11 converts the absorbed solar energy into electrical energy, which is then connected to the power grid through an inverter to achieve photovoltaic synergistic utilization.

[0034] 3) Water tank heat storage process: Start the first circulation pump 4, the third circulation pump 6, the water distributor 8, and the water collector 9. The hot water in the heating water tank 18 passes through the third circulation pump 6 and the second inlet of the second plate heat exchanger 7, transferring heat to the second plate heat exchanger 7. Then, it flows back to the heating water tank 18 from the second outlet of the second plate heat exchanger 7 to continue extracting heat. After absorbing heat, the water in the second plate heat exchanger 7 enters the buried pipe group 1 from the first outlet of the second plate heat exchanger 7 through the water distributor 8, storing the heat in the shallow soil. Subsequently, it flows back to the second plate heat exchanger 7 from the first inlet of the second plate heat exchanger 7 through the water collector 9 and the first circulation pump 4 to continue extracting heat, forming a solar heat storage cycle to the buried pipe group 1, realizing the replenishment of underground soil heat.

[0035] 4) The process of supplying hot water for domestic use: The constant pressure water supply pump 16 is turned on, and the hot water in the heating water tank 18 enters the hot water storage tank 19 for temporary storage. After being pressurized by the constant pressure water supply pump 16, hot water is supplied to users. At the same time, the sixth circulation pump 15 is turned on, and the hot water in the hot water storage tank 19 enters the low temperature air source water heater unit 12 to increase the temperature before returning to the hot water storage tank 19 for storage, thereby improving the quality of the hot water in the hot water storage tank 19. The used domestic hot water returns to the hot water storage tank 19, forming a stable domestic water supply cycle and ensuring a continuous supply of hot water.

[0036] The shallow geothermal energy coupled with air energy and solar energy combined heating, cooling, power and water system of the present invention has the following other advantages: First, this invention uses air source heat pumps, ground source heat pumps, and solar collectors to couple solar cross-seasonal heat storage technology, air source heat pump technology, and ground source heat pump technology together. This solves the problem that a single energy source cannot meet the building's heating, cooling, and hot water needs, and also achieves the thermal balance problem of the soil in the ground source heat pump buried pipe group, ensuring that the system can operate stably and efficiently for a long time.

[0037] Secondly, this invention optimizes control and makes full use of solar energy. Based on the heat meter installed at the first outlet of the ground source heat pump unit, it judges the actual load and ground temperature, and dynamically adjusts the operating status of the ground source heat pump unit, the low temperature air source heat pump unit and each circulation loop to achieve multi-heat source coordinated heating on demand, thereby significantly improving the operating energy efficiency of the ground source heat pump unit, ensuring the long-term stable operation of the system, and ultimately greatly improving the overall performance of the entire coordinated system.

[0038] It is understood that this invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this invention are within the protection scope of this invention.

Claims

1. A shallow geothermal energy coupled with air energy and solar energy combined heat, cooling, electricity and water supply system, comprising a solar energy unit and a geothermal energy unit, wherein the solar energy unit comprises a photovoltaic thermal module, a first plate heat exchanger and a heating water tank connected in sequence, and the geothermal energy unit comprises a group of buried pipes and at least one ground source heat pump unit connected in sequence, characterized in that, Also includes: The heat storage unit includes a second plate heat exchanger, which is connected to a heating water tank and a buried pipe group respectively. The second plate heat exchanger is used to exchange heat between the hot water in the heating water tank and the geothermal water in the buried pipe group, so that the geothermal water temperature rises and is stored in the buried pipe group for heat storage. An air source heat pump unit includes a low-temperature air source heat pump unit, which is used to supply heat to users alone or in conjunction with a ground source heat pump unit. The hot water supply unit includes a low-temperature air source hot water unit and a hot water storage tank connected in sequence. The hot water storage tank is connected to a heating water tank. Hot water in the heating water tank enters the hot water storage tank for storage. The low-temperature air source hot water unit uses air energy to improve the quality of the hot water in the hot water storage tank and then supplies hot water to the user.

2. A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, power and water supply system according to claim 1, characterized in that, The outlet of the buried pipe group is connected to the first inlet of the third plate heat exchanger, the first outlet of the third plate heat exchanger is connected to the inlet of the buried pipe group, and the second inlet and second outlet of the third plate heat exchanger are connected to the user side.

3. A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, electricity and water supply system according to claim 2, characterized in that, The outlet of the buried pipe group is equipped with a water collector, and the inlet of the buried pipe group is equipped with a water distributor. The outlet of the water collector is connected to the first inlet of the ground source heat pump unit, the first inlet of the second plate heat exchanger, and the first inlet of the third plate heat exchanger, respectively. The inlet of the water distributor is connected to the first outlet of the ground source heat pump unit, the first outlet of the second plate heat exchanger, and the first outlet of the third plate heat exchanger, respectively.

4. A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, electricity and water supply system according to claim 3, characterized in that, The outlet of the water collector is connected to the first inlet of the ground source heat pump unit, the first inlet of the second plate heat exchanger, and the first inlet of the third plate heat exchanger via a first circulation pump. The second inlet of the ground source heat pump unit, the inlet of the low-temperature air source heat pump unit, and the second inlet of the third plate heat exchanger are connected to the user side via a second circulation pump. The first outlet of the heating water tank is connected to the second inlet of the second plate heat exchanger via a third circulation pump. The outlet of the photovoltaic thermal module is connected to the first inlet of the first plate heat exchanger via at least one fourth circulation pump. The second inlet of the first plate heat exchanger is connected to the second outlet of the heating water tank via a fifth circulation pump. The first outlet of the hot water storage tank is connected to the inlet of the low-temperature air source hot water unit via a sixth circulation pump. The second outlet of the hot water storage tank is connected to the user side via a constant pressure water supply pump.

5. A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, electricity and water supply system according to claim 4, characterized in that, The inlet of the second circulating pump is connected to the outlet of the soft water tank via a side constant pressure water supply unit, and the inlet of the first circulating pump is connected to the outlet of the soft water tank via a ground source side constant pressure water supply unit. The inlet of the soft water tank is connected to the water source via a water softener.

6. A combined heat, cooling, electricity and water supply system coupling shallow geothermal energy with air energy and solar energy according to claim 1, characterized in that, The third inlet of the heating water tank is connected to the water source through a silicon phosphate crystal water treatment device.

7. A shallow geothermal energy coupled air energy and solar energy combined heat, cooling, electricity and water supply system according to claim 1, characterized in that, The photovoltaic thermal module is connected to the power grid via an inverter.

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