Solar energy-geothermal energy multi-energy complementary heat storage water tank heat supply system and control method

Abstract

The invention belongs to the technical field of multi-energy complementation, and relates to a solar energy-geothermal energy multi-energy complementation heat storage water tank heat supply system and a control method, and the solar energy-geothermal energy multi-energy complementation heat storage water tank heat supply system comprises a domestic hot water-heat storage dual-purpose water tank, a solar panel, a middle-deep layer buried pipe heat exchanger, a ground source heat pump and user side water; the domestic hot water-heat storage dual-purpose water tank is used as an intermediate component for cross-seasonal heat storage to store heat and is also used for providing domestic hot water for a user; the domestic hot water and heat storage dual-purpose water tank is communicated with the solar panel, the middle-deep layer buried pipe heat exchanger and the ground source heat pump in a water way circulation mode, and the domestic hot water and heat storage dual-purpose water tank is further communicated with a user side for water use. According to the multi-energy complementary heat supply system, the advantages of solar energy and geothermal energy are integrated, the seasonal imbalance of the solar energy is overcome, the safety and stability of the geothermal energy are integrated, the resource utilization rate is increased, meanwhile, the operation cost is reduced, no pollution or emission is generated, the occupied area is small, and the manufacturing cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-energy complementation, and in particular relates to a solar energy-geothermal energy multi-energy complementation water storage tank heating system and a control method. Background Art

[0002] With the transformation of energy structure and the increasing demand for clean energy, multi-energy complementary heating system has become a hot topic of research. Multi-energy complementary heating system can integrate multiple energy sources such as solar energy and geothermal energy, improve energy utilization efficiency and reduce environmental pollution. As a renewable energy source, solar energy has the characteristics of seasonality and instability. In order to solve this problem, rock and soil can be used as energy storage carriers to store solar energy in the form of thermal energy in the non-heating season for cross-seasonal heat storage, so as to maximize the annual utilization rate of solar thermal system and minimize the attenuation of geothermal field, and establish a system that can store and regulate energy to ensure the continuity and stability of heating. Multi-energy complementary heating system integrates solar collectors, geothermal units, etc., and switches different working modes according to the supply of different energy sources and heat demand, so as to achieve energy complementarity and coupling and improve energy utilization efficiency.

[0003] However, in actual projects, there is a problem that the machine room area is not enough to install a cross-seasonal hot water storage tank, and when the solar energy is abundant in summer, the water temperature of the domestic hot water storage tank is basically higher than the water temperature used by users, and it needs to be mixed with tap water for users to use. Therefore, the multi-energy complementary heating system in the prior art has the following objective defects: it is impossible to install a large cross-seasonal hot water storage tank due to the limited machine room area; when the water temperature reaches or even exceeds 60℃ in summer, the high-temperature water is directly supplied to users, causing waste; low energy utilization rate and high energy consumption and cost.

[0004] Therefore, a multi-energy complementary heating system with high spatial equipment integration, high energy utilization, low cost and energy consumption is needed to solve this technical problem. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a solar energy-geothermal energy multi-energy complementary water storage tank heating system and a control method. The multi-energy complementary heating system combines the advantages of solar energy and geothermal energy, overcomes the seasonal imbalance of solar energy, and integrates the safety and stability of geothermal energy, improves resource utilization while reducing operating costs, has no pollution and emissions, occupies a small area, and saves cost.

[0006] The present invention is achieved through the following technical solutions: Solar-geothermal multi-energy complementary hot water storage tank heating system, including: domestic hot water-heat storage dual-purpose water tank, solar panels, medium-deep buried pipe heat exchanger, ground source heat pump, user-side water system; A circulating water channel on one side of the domestic hot water-heat storage dual-use water tank is connected to the solar panel; The other side of the domestic hot water-heat storage dual-use water tank is divided into two circulating water paths, which are respectively connected to the medium-deep buried pipe heat exchanger and the ground source heat pump to form a closed water circulation system; The user-side water use system is connected to the supply side of the domestic hot water-heat storage dual-purpose water tank.

[0007] The domestic hot water-heat storage dual-use water tank is used as an intermediate component for cross-seasonal heat storage to store heat and provide domestic hot water to users; the ground source heat pump is used to provide heating to the user side.

[0008] Preferably, a water replenishment tank is provided on the pipeline between the domestic hot water-heat storage dual-purpose water tank and the solar panel, and the water replenishment tank is connected to an external water replenishment pipeline. Preferably, a first flow sensor and a second temperature sensor are provided on a pipeline between a water outlet on one side of the domestic hot water-heat storage dual-purpose water tank and a water inlet of the solar panel; A third temperature sensor and a second flow sensor are arranged on a pipeline between the water outlet of the solar panel and a water inlet on one side of the domestic hot water-heat storage dual-purpose water tank.

[0009] Preferably, a fourth valve is provided on the pipeline between the water inlet on the other side of the domestic hot water-heat storage dual-use water tank and the water outlet of the medium-deep buried pipe heat exchanger; A fourth temperature sensor, a fourth flow sensor, a ground source pump unit for heat storage and a second valve are arranged on the pipeline between the water outlet on the other side of the domestic hot water-heat storage dual-use water tank and the water inlet of the medium-deep buried pipe heat exchanger.

[0010] Preferably, the heat storage ground source pump unit comprises a second heat storage ground source pump and a first heat storage ground source pump; the second heat storage ground source pump and the first heat storage ground source pump are arranged in parallel; A third pressure gauge and a fourth pressure gauge are respectively provided on both sides of the second heat storage ground source pump; A first pressure gauge and a second pressure gauge are respectively provided on both sides of the first heat storage ground source pump.

[0011] Preferably, a third valve, a fifth flow sensor, a fifth temperature sensor and a ground source pump unit for heat extraction are provided on the pipeline between the water inlet of the ground source heat pump and the water outlet of the domestic hot water-heat storage dual-use water tank; A fifth valve and a fourth valve are arranged on the pipeline between the water outlet of the ground source heat pump and the water inlet of the domestic hot water-heat storage dual-purpose water tank.

[0012] Preferably, the ground source pump unit for heat extraction comprises a first ground source pump for heat extraction and a second ground source pump for heat extraction, and the first ground source pump for heat extraction and the second ground source pump for heat extraction are arranged in parallel; A fifth pressure gauge and a sixth pressure gauge are provided on both sides of the first heat extraction ground source pump; A seventh pressure gauge and an eighth pressure gauge are provided at both ends of the second heat extraction ground source pump.

[0013] Preferably, a first valve, a third flow sensor and a hot water pump unit are provided on the pipeline between the user-side water system and the water outlet of the domestic hot water-heat storage dual-use water tank; Preferably, the hot water pump unit comprises a first hot water pump and a second hot water pump; The first hot water pump and the second hot water pump are arranged in parallel; A ninth pressure gauge is provided on both sides of the first hot water pump; An eleventh pressure gauge is respectively provided on both sides of the second hot water pump.

[0014] A control method for a solar-geothermal multi-energy complementary hot water storage tank heating system includes: a heat collection and storage stage, a domestic hot water supply stage, and a user heating supply stage: In the heat collection and storage stage, when it is detected that the temperature of the domestic hot water-heat storage dual-use water tank is higher than the threshold, the circulating water path from the domestic hot water-heat storage dual-use water tank to the ground source heat pump is closed, and the circulating water path from the domestic hot water-heat storage dual-use water tank to the medium-deep buried pipe heat exchanger is opened, and the heat exchanged by the solar energy continuously collected by the solar panels is transported to the deep buried pipe heat exchanger for heat exchange and stored in the earth; When in the domestic hot water supply stage, the circulating water path from the domestic hot water-heat storage dual-use water tank to the user-side water system is opened to supply hot water to the user; During the user heating supply stage, when it is detected that the temperature of the domestic hot water-heat storage dual-use water tank is lower than the threshold, the circulating water line from the domestic hot water-heat storage dual-use water tank to the ground source heat pump is opened, and the circulating water line from the domestic hot water-heat storage dual-use water tank to the medium-deep buried pipe heat exchanger is closed, and the solar panels continuously collect the heat exchanged by solar energy and transmit it to the ground source heat pump for heat exchange to the user for heating.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The solar-geothermal multi-energy complementary hot water storage tank heating system of the present invention uses the domestic hot water-heat storage dual-use water tank as an intermediate component for cross-seasonal heat storage to store heat, and is also used to provide domestic hot water for users; the domestic hot water-heat storage dual-use water tank is respectively connected to the solar panel, the medium-deep buried pipe heat exchanger, and the ground source heat pump by water circulation, and the domestic hot water-heat storage dual-use water tank is also connected to the user side water; the multi-energy complementary heating system of the present invention combines the advantages of solar energy and geothermal energy, overcomes the seasonal imbalance of solar energy, and integrates the safety and stability of geothermal energy, improves resource utilization while reducing operating costs, has no pollution and emissions, and occupies a small area, saving cost. The present invention uses a water tank as both domestic hot water supply and heat storage, realizing a high degree of integration of space and equipment; therefore, the present invention can effectively solve the problem of limited machine room area. The cascade complementary utilization method of solar energy and geothermal energy of the present invention: the high-temperature heat generated by solar energy is stored underground, which complements geothermal energy, and realizes the efficient integrated utilization of multiple clean energy sources.

[0016] Furthermore, the intelligent temperature grading control strategy and intelligent monitoring system of the heat supply port and the supply port of the present invention: by real-time monitoring of water temperature, the opening and closing status of the heat supply port and the supply port are automatically adjusted to reduce human intervention and improve the automation and stability of the system. According to the water temperature in the water tank, the opening and closing of the heat supply port and the supply port are automatically controlled to transport high-temperature heat to underground storage and medium-temperature heat to users. This intelligent temperature grading control can maximize the use of heat in each temperature range and improve the energy efficiency of the system; Furthermore, the system of the present invention is connected to an external water supply pipeline via a water supply tank to ensure a stable water volume in the system, and is equipped with a ground source pump and a hot water pump for heat storage to support redundant operation and flow regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the system structure of the solar energy-geothermal energy multi-energy complementary hot water storage tank heating system of the present invention.

[0018] Among them, 1. Domestic hot water and heat storage dual-use water tank; 2. Solar panels; 3. Water replenishment tank; 4. Medium-deep buried pipe heat exchanger; 5. First temperature sensor; 6. Second temperature sensor; 7. First flow sensor; 8. Third temperature sensor; 9. Second flow sensor; 10. First valve; 11. Third flow sensor; 12. Fourth temperature sensor; 13. Fourth flow sensor; 14. First pressure gauge; 15. First heat storage ground source pump; 16. Second pressure gauge; 17. Third pressure gauge; 18. Second heat storage ground source pump; 19. Fourth pressure gauge; 20. User Side; 21, tap water network; 22, second valve; 23, third valve; 24, fifth flow sensor; 25, fifth temperature sensor; 26, fifth pressure gauge; 27, first ground source pump for heat extraction; 28, sixth pressure gauge; 29, seventh pressure gauge; 30, second ground source pump for heat extraction; 31, eighth pressure gauge; 32, fifth valve; 33, ground source heat pump; 34, fourth valve; 35, ninth pressure gauge; 36, first hot water pump; 37, tenth pressure gauge; 38, eleventh pressure gauge; 39, second hot water pump; 40, twelfth pressure gauge; 41, water use on the user side. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] In the solar energy-geothermal energy multi-energy complementary water storage tank heating system and control method of this embodiment, only one domestic hot water-heat storage dual-purpose water tank is set in the machine room, and the water tank is provided with a heat supplement port and a supply port. The heat supplement port is connected to the inner pipe inlet of the medium-deep buried pipe heat exchanger, and the supply port is connected to the user. Through intelligent regulation, in summer when the solar energy is sufficient and the heating water temperature reaches 60°C, the heat supplement port is opened to transport the high-temperature heat to the underground; when the heating water temperature is below 60°C, the supply port is opened to transport the medium-temperature heat to the user for use.

[0022] like Figure 1As shown, the system of this embodiment includes: a domestic hot water-heat storage dual-use water tank 1, a solar panel 2, a water supply tank 3, a medium-deep buried pipe heat exchanger 4, a first temperature sensor 5, a second temperature sensor 6, a third temperature sensor 8, a fourth temperature sensor 12, and a fifth temperature sensor 25, each of which is connected to an intelligent control system, a first flow sensor 7, a second flow sensor 9, a third flow sensor 11, a fourth flow sensor 13, and a fifth flow sensor 24, each of which is connected to an intelligent control system, a first valve 10, a second valve 22, a third valve 23, a fourth valve 34, and a fifth valve 32, each of which is Solenoid valve, each valve is connected to the intelligent control system respectively, the first pressure gauge 14, the second pressure gauge 16, the third pressure gauge 17, the fourth pressure gauge 19, the fifth pressure gauge 26, the sixth pressure gauge 28, the seventh pressure gauge 29, the eighth pressure gauge 31, the ninth pressure gauge 35, the tenth pressure gauge 37, the eleventh pressure gauge 38, the twelfth pressure gauge 40, each pressure gauge is connected to the intelligent control system respectively, the first ground source pump 15 for heat storage, the second ground source pump 18 for heat storage, the first ground source pump 27 for heat extraction, the second ground source pump 30 for heat extraction, the first hot water pump 36, the second hot water pump 39, the ground source heat pump 33, each pump is connected to the intelligent control system respectively, and the user side water use 41.

[0023] The domestic hot water-heat storage dual-use water tank 1 is used as an intermediate component for storing heat across seasons, and the domestic hot water-heat storage dual-use water tank 1 is also used to provide domestic hot water for users; the ground source heat pump 33 is used to provide heating to the user side; The domestic hot water and heat storage dual-use water tank 1 comprises multiple circulation interfaces: the water tank is provided with multiple water channel interfaces, which are respectively connected to the solar panels, the medium-deep buried pipe heat exchangers, the ground source heat pumps and the user-side water, forming a closed circulation system.

[0024] The solar-geothermal multi-energy complementary hot water storage tank heating system is integrated into the intelligent control system to achieve automatic switching of two functions: Inter-seasonal heat storage: When the water tank temperature is higher than the threshold, the intelligent controller closes the user-side water supply valve, opens the heat storage path, and stores the excess heat underground through the medium-deep buried pipe heat exchanger.

[0025] Domestic hot water supply: When the water tank temperature is lower than the threshold, the heat storage path is closed, the user-side water supply valve is opened directly, and the medium-temperature water is delivered to the user through the hot water pump.

[0026] The invention connects a flow sensor and a temperature sensor in series at the water outlet and water inlet of the domestic hot water-heat storage dual-use water tank 1, and controls the water flow direction through a solenoid valve. It is also equipped with a ground source pump and a hot water pump for heat storage, supporting redundant operation and flow regulation.

[0027] The domestic hot water-heat storage dual-use water tank 1 is connected to the solar panel 2, the medium-deep buried pipe heat exchanger 4, and the ground source heat pump 33 through a water circulation, and the domestic hot water-heat storage dual-use water tank 1 is also connected to the user-side water use system 41.

[0028] The pipeline from the domestic hot water and heat storage dual-use water tank 1 to the solar panel 2 is also connected to a water replenishment tank 3, and the water replenishment tank 3 is connected to an external water replenishment pipeline; the water replenishment tank 3 is used to replenish water to the hot water storage tank heating system to ensure the stability of the system water volume.

[0029] There are multiple solar panels 2, and the solar panels 2 are connected by water channels.

[0030] The connection method of the domestic hot water-heat storage dual-use water tank 1 circulating water to connect the solar panel 2, the medium-deep buried pipe heat exchanger 4, the ground source heat pump 33, and the user-side water system 41 includes: The water outlet of the domestic hot water-heat storage dual-use water tank 1 is connected in series with the first flow sensor 7 and the second temperature sensor 6 and then connected to the water inlet of the solar panel 2; the water outlet of the solar panel 2 is connected in series with the third temperature sensor 8 and the second flow sensor 9 and then connected to the water inlet of the domestic hot water-heat storage dual-use water tank 1; The water outlet of the domestic hot water-heat storage dual-use water tank 1 is connected in series to the fourth temperature sensor 12, the fourth flow sensor 13, and the second heat storage ground source pump 18, and then connected to the water inlet of the second valve 22, the water outlet of the second valve 22 is connected to the water inlet of the medium-deep buried pipe heat exchanger 4, the water outlet of the medium-deep buried pipe heat exchanger 4 is connected to the water inlet of the fourth valve 34, and the water outlet of the fourth valve 34 is connected to the water inlet of the domestic hot water-heat storage dual-use water tank 1; The water outlet of the second valve 22 is connected to the water inlet of the third valve 23, the water outlet of the third valve 23 is connected in series with the fifth flow sensor 24, the fifth temperature sensor 25, and the second heat extraction ground source pump 30, and then connected to the water inlet of the ground source heat pump 33, the water outlet of the ground source heat pump 33 is connected to the water inlet of the fifth valve 32, and the water outlet of the fifth valve 32 is connected to the water inlet of the fourth valve 34; The water outlet of the domestic hot water-heat storage dual-use water tank 1 is connected in series with the first valve 10, the third flow sensor 11, and the first hot water pump 36 and then connected to the user-side water system 41.

[0031] 5. The solar energy-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 4 is characterized in that the first valve 10, the second valve 22, the third valve 23, the fourth valve 34, and the fifth valve 32 are all solenoid valves, and the first valve 10, the second valve 22, the third valve 23, the fourth valve 34, and the fifth valve 32 are electrically connected to the intelligent controller respectively, and the intelligent controller is also electrically connected to the first flow sensor 7, the second flow sensor 9, the third flow sensor 11, the fourth flow sensor 13, the fifth flow sensor 24, the second heat storage ground source pump 18, the second heat extraction ground source pump 30, and the first hot water pump 36.

[0032] The system operation process is divided into the following stages: 1. Heat collection and storage stage: The solar panel 2 continuously collects solar energy, the mid-deep underground heat exchanger 4 is a key component for heat exchange and storage, the ground source heat pump 33 converts and transmits the collected heat, and the first heat storage ground source pump 15 and the second heat storage ground source pump 18 transport the heat to the domestic hot water-heat storage dual-purpose water tank 1. When the water tank temperature reaches 60°C, the heat replenishment port is opened, and the high-temperature heat is transported to the underground buried heat exchanger for storage by controlling each solenoid valve, that is, the first valve 10 is closed, the second valve 22 is opened, the third valve 23 is closed, the fourth valve 34 is opened, and the fifth valve 32 is closed.

[0033] 2. Domestic hot water supply stage: When the first temperature sensor 5 of the water tank 1 detects that the temperature is lower than 60°C, the supply port is opened, and the first hot water pump 36 and the second hot water pump 39 are turned on to deliver medium-temperature hot water to the user side 41. Since all temperature sensors, flow sensors, solenoid valves, ground source pumps, and hot water pumps are connected to the intelligent control system, the system monitors and automatically adjusts the operating status of each component in real time, and each pressure gauge monitors the system pressure.

[0034] In the whole system, the domestic hot water-heat storage dual-purpose water tank 1 is the core component of the system. It is used as an intermediate component for cross-seasonal heat storage to store heat and provide domestic hot water for users. The heat supply port is connected to the underground deep buried heat exchanger, which is opened when the water temperature reaches 60°C to transport the high-temperature heat to the underground for storage. The supply port is opened when the water temperature in the water tank is lower than 60°C to supply medium-temperature hot water to users.

[0035] Through the intelligent control system, the water temperature changes in the water tank are monitored in real time, and the opening status of the heat supply port and the supply port are automatically adjusted to ensure efficient operation of the system, greatly reduce manual intervention, and improve the system's degree of automation and stability.

[0036] When the water temperature is monitored by the temperature graded response strategy and is ≥60°C, it is determined to be in a high temperature state, and the heat supply port is activated to transfer the excess high temperature heat to underground storage, reducing the waste of hot water and improving the energy efficiency of the water tank. When the water temperature is monitored <60°C, it is determined to be in a medium temperature state, and the domestic hot water supply port is activated to meet the user's domestic water needs such as bathing, avoiding energy loss caused by the need to mix water. The temperature graded response strategy makes full use of the heat in different temperature ranges to improve the comprehensive energy utilization efficiency of the entire system.

[0037] To sum up, the multi-energy complementary heating system of the present invention combines the advantages of solar energy and geothermal energy, overcomes the seasonal imbalance of solar energy, and integrates the safety and stability of geothermal energy, improves resource utilization while reducing operating costs, has no pollution and emissions, occupies a small area, and saves cost. Therefore, the present invention has broad application prospects in small heating systems.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A solar-geothermal multi-energy complementary hot water storage tank heating system, characterized in that: include: Domestic hot water-heat storage dual-use water tank (1), solar panels (2), medium-deep buried pipe heat exchanger (4), ground source heat pump (33), user-side water use system (41); A circulating water path on one side of the domestic hot water-heat storage dual-use water tank (1) is connected to the solar panel (2); The circulating water path on the other side of the domestic hot water-heat storage dual-use water tank (1) is divided into two paths, which are respectively connected to the medium-deep buried pipe heat exchanger (4) and the ground source heat pump (33), forming a closed water circulation system; The user-side water use system (41) is connected to the supply side of the domestic hot water-heat storage dual-purpose water tank (1); The domestic hot water-heat storage dual-purpose water tank (1) is used as an intermediate component for cross-seasonal heat storage to store heat and provide domestic hot water for users; the ground source heat pump (33) is used to provide heating to the user side.

2. The solar-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 1 is characterized in that: A water replenishment tank (3) is provided on the pipeline between the domestic hot water-heat storage dual-purpose water tank (1) and the solar panel (2), and the water replenishment tank (3) is connected to an external water replenishment pipeline.

3. The solar-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 1 is characterized in that: A first flow sensor (7) and a second temperature sensor (6) are provided on the pipeline between a water outlet on one side of the domestic hot water-heat storage dual-purpose water tank (1) and a water inlet of the solar panel (2); A third temperature sensor (8) and a second flow sensor (9) are provided on the pipeline between the water outlet of the solar panel (2) and a water inlet on one side of the domestic hot water-heat storage dual-purpose water tank (1).

4. The solar-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 1 is characterized in that: A fourth valve (34) is provided on the pipeline between the water inlet on the other side of the domestic hot water-heat storage dual-purpose water tank (1) and the water outlet of the medium-deep buried pipe heat exchanger (4); A fourth temperature sensor (12), a fourth flow sensor (13), a heat storage ground source pump unit and a second valve (22) are arranged on the pipeline between the water outlet on the other side of the domestic hot water-heat storage dual-use water tank (1) and the water inlet of the medium-deep buried pipe heat exchanger (4).

5. The solar-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 4 is characterized in that: The heat storage ground source pump unit comprises a second heat storage ground source pump (18) and a first heat storage ground source pump (15); the second heat storage ground source pump (18) and the first heat storage ground source pump (15) are arranged in parallel; A third pressure gauge (17) and a fourth pressure gauge (19) are respectively provided on both sides of the second heat storage ground source pump (18); A first pressure gauge (14) and a second pressure gauge (16) are respectively provided on both sides of the first heat storage ground source pump (15).

6. The solar-geothermal multi-energy complementary hot water storage tank heating system according to claim 1 is characterized in that: A third valve (23), a fifth flow sensor (24), a fifth temperature sensor (25) and a heat extraction ground source pump unit are provided on the pipeline between the water inlet of the ground source heat pump (33) and the water outlet of the domestic hot water-heat storage dual-purpose water tank (1); A fifth valve (32) and a fourth valve (34) are provided on the pipeline between the water outlet of the ground source heat pump (33) and the water inlet of the domestic hot water-heat storage dual-purpose water tank (1).

7. The solar-geothermal energy multi-energy complementary hot water storage tank heating system according to claim 6 is characterized in that: The ground source heat pump unit comprises a first ground source heat pump (27) and a second ground source heat pump (30), and the first ground source heat pump (27) and the second ground source heat pump (30) are arranged in parallel; A fifth pressure gauge (26) and a sixth pressure gauge (28) are provided on both sides of the first heat extraction ground source pump (27); A seventh pressure gauge (29) and an eighth pressure gauge (31) are provided at both ends of the second heat extraction ground source pump (30).

8. The solar-geothermal multi-energy complementary hot water storage tank heating system according to claim 1 is characterized in that: A first valve (10), a third flow sensor (11) and a hot water pump unit are provided on the pipeline between the user-side water system (41) and the water outlet of the domestic hot water-heat storage dual-purpose water tank (1).

9. The solar-geothermal multi-energy complementary hot water storage tank heating system according to claim 8 is characterized in that: The hot water pump unit comprises a first hot water pump (36) and a second hot water pump (39); The first hot water pump (36) and the second hot water pump (39) are arranged in parallel; A ninth pressure gauge (35) and a tenth pressure gauge (37) are respectively provided on both sides of the first hot water pump (36); An eleventh pressure gauge (38) and a twelfth pressure gauge (40) are respectively arranged on both sides of the second hot water pump (39).

10. A control method for a solar-geothermal multi-energy complementary hot water storage tank heating system, characterized in that: The control method is used to control the hot water storage tank heating system according to any one of claims 1 to 9, comprising: a heat collection and storage stage, a domestic hot water supply stage, and a user heating supply stage; In the heat collection and storage stage, when it is detected that the temperature of the domestic hot water-heat storage dual-use water tank (1) is higher than a threshold value, the circulating water path from the domestic hot water-heat storage dual-use water tank (1) to the ground source heat pump (33) is closed, and the circulating water path from the domestic hot water-heat storage dual-use water tank (1) to the medium-deep underground pipe heat exchanger (4) is opened, and the heat exchanged by the solar energy continuously collected by the solar panel (2) is transported to the deep underground pipe heat exchanger (4) for heat exchange to the earth for storage; When in the domestic hot water supply stage, the circulating water path from the domestic hot water-heat storage dual-use water tank (1) to the user-side water system (41) is opened to supply hot water to the user; During the user heating supply stage, when it is detected that the temperature of the domestic hot water-heat storage dual-use water tank (1) is lower than a threshold value, the circulating water path from the domestic hot water-heat storage dual-use water tank (1) to the ground source heat pump (33) is opened, and the circulating water path from the domestic hot water-heat storage dual-use water tank (1) to the medium-deep buried pipe heat exchanger (4) is closed, and the heat exchanged by the solar energy continuously collected by the solar panel (2) is transmitted to the ground source heat pump (33) for heat exchange to the user for heating.

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