Cold-heat-electricity multi-energy coupling method based on green carbon building in hot-summer and cold-winter region

Abstract

The invention discloses a cold-heat-electricity multi-energy coupling method based on a green carbon building in a hot-summer and cold-winter region, and solves the technical problem of high cold and heat supply energy consumption in the building field. According to the technical scheme, the system comprises a double-heat-source heat pump unit used for conducting heat exchange on a building; the photovoltaic heat exchange unit is used for supplying power to the building and exchanging heat with the refrigerant of the double-heat-source heat pump unit; the ground source water heat exchange unit is used for exchanging heat with a refrigerant of the double-heat-source heat pump unit; the solar heat collection unit is used for storing heat converted from solar energy into the soil heat storage unit and exchanging heat with a refrigerant of the double-heat-source heat pump unit; the off-peak electricity heating unit is used for off-peak electricity heating and storing heat into the soil heat storage unit; and the shallow soil heat storage unit is used for storing heat generated by the solar heat collection unit and heat generated by the valley electricity heating unit, exchanging heat with a refrigerant of the double-heat-source heat pump unit and exchanging heat with the ground source water heat exchange unit.

Description

Technical Field

[0001] The invention relates to the technical field of green buildings, and in particular to a cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot-summer and cold-winter areas. Background Art

[0002] At present, global energy consumption is growing rapidly, and with it comes a continuous rise in global temperatures. Certain measures need to be taken to achieve the global warming goals of the Paris Agreement to control the temperature increase to 1.5°C and the increase compared to the pre-industrial period to 2.0°C.

[0003] The construction industry accounts for a large proportion of the energy consumption and carbon emissions of all industries in society. Statistics show that the greenhouse gases generated by the global construction sector account for 39% of the entire industry. The demand for energy conservation and emission reduction in the construction industry is becoming more and more urgent.

[0004] As a new type of energy-saving technology, multi-energy coupling and complementary technology has high energy utilization efficiency and environmental protection characteristics, and occupies an important position in the field of modern energy applications. Research and application of multi-energy coupling and complementary technology has become an important topic in the world's energy field. Therefore, there is an urgent need for an energy system that can achieve efficient energy utilization, reduce carbon emissions, and improve the stability and reliability of the energy system through multi-energy coupling and complementary technology to solve the current problem of building energy consumption.

[0005] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as admitting or implying in any form that the above technical information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas, which solves the technical problem of high energy consumption of cold and heat supply in the building field.

[0007] The technical solution of this application is: A cold-heat-electric multi-energy coupling method based on green carbon buildings in hot-summer and cold-winter regions, including a dual-heat source heat pump unit for heat exchange of the building; Photovoltaic heat exchange unit, used to power the building and exchange heat with the refrigerant of the dual-source heat pump unit; A ground source water heat exchange unit, used for exchanging heat with the refrigerant of the dual heat source heat pump unit; A solar thermal collection unit is used to store the heat converted from solar energy in a soil heat storage unit and to exchange heat with the refrigerant of a dual heat source heat pump unit; Valley power heating unit, used for valley power heating and storing heat in soil thermal storage unit; The shallow soil heat storage unit is used to store the heat generated by the solar thermal collection unit, the heat generated by the valley electricity heating unit, to exchange heat with the refrigerant of the dual heat source heat pump unit, and to exchange heat with the ground source water heat exchange unit.

[0008] On the basis of the above technical solution, as a preferred technical solution, when the building needs to be cooled in summer, the refrigerant of the dual heat source heat pump unit circulates along the compressor-ground source water heat exchange unit-expansion valve-heat exchanger-compressor.

[0009] On the basis of the above technical solution, as a preferred technical solution, when the building needs to be heated in winter, the refrigerant of the dual heat source heat pump unit performs a double circulation, and the first circulation path is: photovoltaic heat exchange unit-compressor-heat exchanger-expansion valve-photovoltaic heat exchange unit, and the second circulation path is ground source water heat exchange unit-compressor-heat exchanger-expansion valve-photovoltaic heat exchange unit.

[0010] On the basis of the above technical solution, as a preferred technical solution, the heat exchanger exchanges heat with the building through the main heat circulation channel; the heat exchanger exchanges heat with the solar thermal collection unit through the second heat circulation channel; the heat exchanger exchanges heat with the shallow soil heat storage unit through the third heat circulation channel.

[0011] On the basis of the above technical solution, as a preferred technical solution, the shallow soil heat storage unit exchanges heat with the solar energy collection unit through the first heat circulation channel; the shallow soil heat storage unit exchanges heat with the valley electricity heating unit through the fourth heat circulation channel.

[0012] On the basis of the above technical solution, as a preferred technical solution, the second heat circulation channel is connected in parallel with the first heat circulation channel through a control valve group, and the third heat circulation channel and the fourth heat circulation channel are respectively connected to the shallow soil heat storage unit.

[0013] On the basis of the above technical solution, as a preferred technical solution, the photovoltaic heat exchange unit includes a photovoltaic curtain wall, and the air heated by the photovoltaic curtain wall exchanges heat with the air source heat exchanger of the dual heat source heat pump unit.

[0014] On the basis of the above technical solution, as a preferred technical solution, the ground source water heat exchange unit exchanges heat with the ground source water heat exchanger of the dual heat source heat pump unit through the fifth heat circulation channel, and the ground source water heat exchanger and the air source heat exchanger are connected in parallel between the compressor and the expansion valve of the ground source water heat exchange unit through a control valve group.

[0015] On the basis of the above technical solution, as a preferred technical solution, when the outdoor temperature is higher than 15°C, the dual-heat source heat pump unit cools the building. If the water temperature of the solar thermal collection unit is higher than 50°C, the solar thermal collection unit stores the heat converted from solar energy in the shallow soil heat storage unit through the first heat circulation channel; if it is in the valley power period, the valley power heating unit converts excess electricity into heat and stores it in the shallow soil heat storage unit through the fourth heat circulation channel.

[0016] On the basis of the above technical scheme, as a preferred technical scheme, when the outdoor temperature is lower than 15°C, the dual-heat-source heat pump unit heats the building. If the water temperature of the solar thermal collection unit is 30°C-50°C, the solar thermal collection unit exchanges heat with the heat exchanger of the dual-heat-source heat pump unit through the second heat circulation channel; if the water temperature of the solar thermal collection unit is higher than 50°C, the solar thermal collection unit stores the heat converted from solar energy in the shallow soil heat storage unit through the first heat circulation channel; if it is in the valley power period, the valley power heating unit converts the excess electricity into heat and stores it in the shallow soil heat storage unit through the fourth heat circulation channel; if the soil temperature is higher than ℃, the heat stored in the shallow soil heat storage unit exchanges heat with the heat exchanger through the third heat circulation channel.

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The technical solution provided by the present invention adopts a dual heat source heat pump unit of air and soil, which can be applied to different climate zones and can meet the energy needs of various types of buildings.

[0018] 2. The technical solution provided by the present invention to install a photovoltaic curtain wall can not only provide heat for the air source heat pump to improve the efficiency of the heat pump, but also provide the electricity required for cooling inside the building to achieve building energy saving.

[0019] 3 The present invention converts solar energy into thermal energy through a solar thermal collector and stores the heat in the soil, which can alleviate soil cold accumulation.

[0020] 4. The technical solution provided by the present invention makes full use of the peak-valley electricity price. During the valley electricity consumption period, the intelligent valley electricity heating unit can convert the excess electricity into heat and store it in the shallow soil heat storage unit with high heat storage capacity, thereby improving energy utilization efficiency. 5. The technical solution provided by the present invention is mainly aimed at solving the problem of energy consumption in buildings. A dual-heat source heat pump is set up to improve the efficiency of the heat pump. The photovoltaic curtain wall can provide a continuous source of renewable energy for the heat pump. The soil heat storage can alleviate the accumulation of soil cold. The peak and valley electricity prices are fully considered, the excess electricity is fully utilized, and the energy utilization rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the principle of the present invention; Figure 2 It is a schematic diagram of the principle of summer operation of the present invention; Figure 3 It is a schematic diagram of the principle of winter operation of the present invention.

[0023] Description of Figure Numbers: 1. Building, 2. Photovoltaic curtain wall, 3. Compressor, 4. Air source heat exchanger, 5. Ground source water heat exchanger, 6. Expansion valve, 7. Heat exchanger, 8. Earth energy storage device, 9. Underground heat exchange tube, 10. High heat storage material, 11. Insulation layer, 12. Solar collector, 13. Circulation pump 1, 14. Circulation pump 2, 15. Circulation pump 3, 16. Circulation pump 4, 17. Valve 13, 18. Valve 14, 19. Three-way valve 1, 20. Three-way valve 2, 21. Three-way valve 3, 22. Three-way valve 4, 23. Valve 1, 24. Valve 2, 25. Valve 3, 26. Valve 4, 27. Valve 5, 28. Valve 6, 29. Valve 7, 30. Valve 8, 31. Valve 9, 32. Valve 10, 33. Valve 11, 34. Valve 12; 100, dual heat source heat pump unit, 200, photovoltaic heat exchange unit, 300, ground source water heat exchange unit, 400, solar thermal collection unit, 500, valley electricity heating unit, 600, shallow soil heat storage unit; 1000. Main heat circulation channel, 1001. First heat circulation channel, 1002. Second heat circulation channel, 1003. Third heat circulation channel, 1004. Fourth heat circulation channel. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 core concept of the present invention and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0026] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial" and the like indicate positions or positional relationships only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0027] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0028] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0029] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] A multi-energy coupling method of cooling, heating and electricity based on green carbon buildings in hot summer and cold winter areas, such as Figure 1 As shown, a dual-heat-source heat pump unit 100 is included, which is used to perform heat exchange on the building 1, and the building 1 is cooled or heated by the dual-heat-source heat pump unit 100.

[0032] The photovoltaic heat exchange unit 200 is used to supply power to the building 1 and to exchange heat with the refrigerant of the dual heat source heat pump unit 100. The photovoltaic heat exchange unit 200 generates photovoltaic power through solar energy. On the one hand, it uses the electric energy generated by the photovoltaic panels to supply power to the electrical equipment of the building 1 on a daily basis, and also to the electrical equipment such as the compressor 3 and the circulating pump 2 14 of the dual heat source heat pump unit 100; on the other hand, it uses the heat energy generated by the photovoltaic panels, that is, in the heating cycle of the dual heat source heat pump unit 100, to supply heat source to the refrigerant at the heat absorption end of the dual heat source heat pump unit 100.

[0033] The ground source water heat exchange unit 300 is used to exchange heat with the refrigerant of the dual heat source heat pump unit 100. That is, in the refrigeration cycle of the dual heat source heat pump unit 100, the ground source water heat exchange unit 300 supplies the cold source for the refrigerant at the cold end of the dual heat source heat pump unit 100; in the heating cycle of the dual heat source heat pump unit 100, the ground source water heat exchange unit 300 supplies the heat source for the refrigerant at the heat end of the dual heat source heat pump unit 100.

[0034] The solar thermal collection unit 400 is used to store the heat converted from solar energy in the soil thermal storage unit 600 and to exchange heat with the refrigerant of the dual heat source heat pump unit 100. That is, the solar thermal collection unit 400 uses solar energy to heat the circulating water. According to the temperature of the hot water and the operating conditions of the entire system, the heated circulating water can be stored in the soil thermal storage unit 600 and can also provide heat to the heat exchanger 7 of the dual heat source heat pump unit 100.

[0035] The valley power heating unit 500 is used for valley power heating and storing heat in the soil heat storage unit 600, thereby increasing the water temperature in the soil heat storage unit 600, and further increasing the temperature of the shallow soil.

[0036] The shallow soil heat storage unit 600 is used to store the heat generated by the solar thermal collection unit 600, the heat generated by the valley power heating unit 500, to exchange heat with the refrigerant of the dual heat source heat pump unit 100, and to exchange heat with the ground source water heat exchange unit 300.

[0037] Based on the above embodiments, as a preferred embodiment, Figure 2As shown, the dotted line in the figure is a deactivated circulation channel. When the building 1 needs to be cooled in summer, the refrigerant of the dual heat source heat pump unit 100 circulates along the compressor 3-ground source water heat exchange unit 300-expansion valve 6-heat exchanger 7-compressor 3.

[0038] Based on the above embodiments, as a preferred embodiment, Figure 3 As shown, when the building 1 needs to be heated in winter, the refrigerant of the dual heat source heat pump unit 100 performs a double cycle, and the first cycle path is: photovoltaic heat exchange unit 200-compressor 3-heat exchanger 7-expansion valve 6-photovoltaic heat exchange unit 200, and the second cycle path is ground source water heat exchange unit 300-compressor 3-heat exchanger 7-expansion valve 6-photovoltaic heat exchange unit 200.

[0039] Based on the above embodiments, as a preferred embodiment, Figure 2 As shown, the heat exchanger 7 exchanges heat with the building 1 through the main heat circulation channel 1000; the heat exchanger 7 exchanges heat with the solar thermal collection unit 400 through the second heat circulation channel 1002; the heat exchanger 7 exchanges heat with the shallow soil heat storage unit 600 through the third heat circulation channel 1003.

[0040] On the basis of the above embodiments, as a preferred embodiment, the shallow soil heat storage unit 600 exchanges heat with the solar energy heat collection unit 400 through the first heat circulation channel 1001; the shallow soil heat storage unit 600 exchanges heat with the valley electricity heating unit 500 through the fourth heat circulation channel 1004.

[0041] Based on the above embodiments, as a preferred embodiment, the second heat circulation channel 1002 is connected in parallel with the first heat circulation channel 1001 through a control valve group, and the third heat circulation channel 1003 and the fourth heat circulation channel 1004 are respectively connected to the shallow soil heat storage unit 600.

[0042] On the basis of the above embodiments, as a preferred embodiment, the photovoltaic heat exchange unit 200 includes a photovoltaic curtain wall 2, and the air heated by the photovoltaic curtain wall 2 exchanges heat with the air source heat exchanger 4 of the dual heat source heat pump unit 100.

[0043] On the basis of the above embodiments, as a preferred embodiment, the ground source water heat exchange unit 300 exchanges heat with the ground source water heat exchanger 5 of the dual heat source heat pump unit 100 through the fifth heat circulation channel 105, and the ground source water heat exchanger 5 and the air source heat exchanger 4 are connected in parallel between the compressor 3 and the expansion valve 6 of the ground source water heat exchange unit 300 through a control valve group.

[0044] On the basis of the above embodiments, as a preferred embodiment, when the outdoor temperature is higher than 15°C, the dual heat source heat pump unit 100 cools the building 1. If the water temperature of the solar thermal collection unit 400 is higher than 50°C, the solar thermal collection unit 400 stores the heat converted from solar energy in the shallow soil heat storage unit 600 through the first heat circulation channel 1001; if it is in the valley power period, the valley power heating unit 500 converts the excess electricity into heat and stores it in the shallow soil heat storage unit 600 through the fourth heat circulation channel 1004.

[0045] On the basis of the above embodiments, as a preferred embodiment, when the outdoor temperature is lower than 15°C, the dual-heat-source heat pump unit 100 heats the building 1. If the water temperature of the solar thermal collection unit 400 is 30°C-50°C, the solar thermal collection unit 400 exchanges heat with the heat exchanger 7 of the dual-heat-source heat pump unit 100 through the second heat circulation channel 1002; if the water temperature of the solar thermal collection unit 400 is higher than 50°C, the solar thermal collection unit 400 stores the heat converted from solar energy in the shallow soil heat storage unit 600 through the first heat circulation channel 1001; if it is in the valley power period, the valley power heating unit 500 converts the excess electricity into heat and stores it in the shallow soil heat storage unit 600 through the fourth heat circulation channel 1004; if the soil temperature is higher than 30°C, the heat stored in the shallow soil heat storage unit 600 exchanges heat with the heat exchanger 7 through the third heat circulation channel 1003.

[0046] As a preferred embodiment of the cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas, Figures 1 to 3 As shown, it includes a dual heat source heat pump unit 100, a solar thermal collection unit 400, a first heat circulation channel 1001, a second heat circulation channel 1002, a third heat circulation channel 1003, a shallow soil heat storage unit 600 with high heat storage, an intelligent valley electricity heating unit 500 and a photovoltaic heat exchange unit 200 integrated with the building 1.

[0047] The dual-source heat pump unit 100 exchanges heat with the heat exchange channel of the building 1, and can effectively achieve heat exchange with the building 1; the solar thermal unit 400 uses the solar thermal collector 12 to convert solar energy into thermal energy, and stores the converted thermal energy in the shallow soil thermal storage unit 600 with high heat storage, or directly provides it to the building 1. The high heat storage shallow soil heat storage unit 600 includes an insulation layer 11, an underground heat exchange pipe 9 and a high heat storage material 10, which can efficiently store the heat generated by the solar thermal collection unit 400 and the heat generated by the smart valley electric heating unit 500 during operation and keep the heat for a long time.

[0048] The intelligent valley electricity heating unit 500 cleverly utilizes the valley electricity period for heating and stores the heat in a specially designed shallow soil heat storage unit 600.

[0049] The photovoltaic heat exchange unit 200 is a building-integrated photovoltaic heat exchange unit that can provide an air source for the dual-heat-source heat pump unit 100 and can also provide electricity for the building 1 .

[0050] See also Figure 1 In the dual heat source heat pump unit 100, a compressor 3, an air source heat exchanger 4, a ground source water heat exchanger 5, an expansion valve 6 and a heat exchanger 7 are cyclically connected through a main heat circulation channel 1000. One end of the compressor 3 is connected to one end of the air source heat exchanger 4 through a valve 1 23 and a valve 2 24 of a three-way valve 19, and the compressor 3 is connected to one end of the ground source water heat exchanger 5 through a valve 1 23 and a valve 3 25 of a three-way valve 19, and the other end of the air source heat exchanger 4 is connected to one end of the expansion valve 6 through a valve 4 26 and a valve 5 27 of a three-way valve 220, and the other end of the ground source water heat exchanger 5 is connected to one end of the expansion valve 6 through a valve 6 28 and a valve 5 27 of a three-way valve 220, and the other end of the expansion valve 6 is connected to one end of the heat exchanger 7, and the other end of the heat exchanger 7 is connected to the other end of the compressor 3.

[0051] See also Figure 1 The dual-source heat pump is composed of an air source heat pump and a soil source heat pump.

[0052] See also Figure 2 In summer, the air-conditioning terminal building 1 adopts the "cooling" mode. In this mode, the refrigerant gas at the outlet of the compressor 3 enters the ground source water heat exchanger 5 through the valve 2 24 and the valve 3 25 of the three-way valve 19, and the circulating pump 13 drives the circulating water in the buried pipe to exchange heat with the ground source water heat exchanger 5. The refrigerant at the outlet of the ground source water heat exchanger 5 enters the heat exchanger 7 through the expansion valve 6, and enters the compressor 3 after heat exchange with the user in the heat exchanger 7.

[0053] See also Figure 3 When it is winter, the air conditioning terminal building 1 adopts the "heating" mode. The refrigerant at the outlet of the air source heat exchanger 4 enters the compressor 3 through the valve 1 23 and the valve 2 24 of the three-way valve 19, and the refrigerant at the outlet of the ground source water heat exchanger 5 enters the compressor 3 through the valve 2 24 and the valve 3 25 of the three-way valve 19. The refrigerant at the outlet of the compressor 3 enters the heat exchanger 7 to exchange heat with the user and then enters the expansion valve 6. At this time, the circulating pump 13 drives the circulating water in the buried pipe to exchange heat with the ground source water heat exchanger 5.

[0054] See also Figure 1 In the dual heat source heat pump unit 100, the air source in the air source heat exchanger 4 is generated by heating the air between the curtain walls by the photovoltaic panels outside the building.

[0055] See also Figure 1 In the dual heat source heat pump unit 100, the ground source water heat exchanger 5 is connected to the ground source water circulation pipeline.

[0056] See also Figure 1 In the shallow soil heat storage unit 600 with high heat storage, it includes a thermal insulation layer 11, an underground heat exchange pipe 9 and a high heat storage material 10.

[0057] See also Figure 1 In the shallow soil thermal storage unit 600 with high heat storage, the high heat storage material 10 can be pebbles, which can enhance the energy storage and heat preservation effects.

[0058] See also Figure 1 A solar thermal collection unit 400 and an intelligent valley electric heating unit 500 are set up to alleviate the cold accumulation of the soil.

[0059] See also Figure 1 In the shallow soil heat storage unit 600 with high heat storage, the shallow soil heat storage unit 600 with high heat storage is connected to the solar heat collection unit 400 through the first heat circulation channel 1001, the solar heat collector 12 is connected to the circulation pump 2 15, and the circulation pump 2 15 is connected to the shallow soil heat storage unit 600 with high heat storage through the valve 10 32 and the valve 11 33 of the three-way valve 4 22, and the shallow soil heat storage unit 600 with high heat storage is connected to the other end of the solar heat collector 12 through the valve 7 29 and the valve 8 30 of the three-way valve 3 21.

[0060] See also Figure 1 In the dual heat source heat pump unit 100, the dual heat source heat pump unit 100 is connected to the solar thermal collector unit 400 through the second heat circulation channel 1002, and the solar thermal collector 12 is connected to the circulation pump 2 15. At the same time, the circulation pump 2 15 is connected to the heat exchanger 7 in the dual heat source heat pump unit 100 through the valve 10 32 and the valve 12 34 of the three-way valve 4 22. The other end of the heat exchanger 7 is connected to the other end of the solar thermal collector 12 through the valve 7 29 and the valve 9 31 of the three-way valve 3 21.

[0061] See also Figure 1 In the dual heat source heat pump unit 100, the dual heat source heat pump unit 100 is connected to the shallow soil heat storage unit 600 with high heat storage through the third heat circulation channel 1003, and the shallow soil heat storage unit 600 with high heat storage is connected to the heat exchanger 7 in the dual heat source heat pump unit 100 through the valve eleven 33 and the valve twelve 34 of the three-way valve four 22, and the other end of the heat exchanger 7 is connected to the other end of the shallow soil heat storage unit 600 with high heat storage through the valve eight 30 and the valve nine 31 of the three-way valve three 21.

[0062] The above-mentioned cold-heat-electric multi-energy coupling system based on green carbon buildings in hot summer and cold winter areas can realize "cooling" mode and "heating" mode: "Cooling" mode: when the outdoor temperature is higher than 15℃, open valve two 24, valve three 25 of three-way valve one 19, valve five 27 of three-way valve 220, valve six 28 and valve seven 29 of three-way valve three 21, valve eight 30 and valve ten 32, valve eleven 33 and valve thirteen 17 of three-way valve four 22, and close valve two 24 of three-way valve one 19, valve four 26 of three-way valve 220, valve nine 31 of three-way valve three 21, valve twelve 34 of three-way valve four 22 and valve fourteen 18, and the dual heat source heat pump unit exchanges heat with building 1 to provide cooling for building 1. If the water temperature of the solar collector 12 is higher than 50°C, the solar thermal collection unit 400 stores the heat converted from solar energy in the shallow soil heat storage unit 600 with high heat storage through the first heat circulation channel 1001; if it is in the valley power period, the intelligent valley power heating unit 500 converts the excess electricity into heat through the fourth heat circulation channel 1004 and stores it in the shallow soil heat storage unit 600 with high heat storage.

[0063] "Heating" mode: when the outdoor temperature is lower than 15°C, open valve 1 23, valve 2 24, valve 3 25 of three-way valve 1 19, valve 4 26, valve 5 27, valve 6 28 of three-way valve 220, valve 7 29, valve 8 30, valve 9 31 of three-way valve 3 21, valve 10 32, valve 11 33, valve 12 34, valve 13 17 and valve 14 18 of three-way valve 4 22, and the dual heat source heat pump unit exchanges heat with building 1 and provides heating for building 1. If the water temperature of the solar thermal collector 12 is higher than 50°C, the solar thermal collection unit 400 stores the heat converted from solar energy in the shallow soil heat storage unit 600 with high heat storage through the first heat circulation channel 1001; if it is in the valley power period, the intelligent valley power heating unit 500 converts the excess electricity into heat through the fourth heat circulation channel 1004 and stores it in the shallow soil heat storage unit 600 with high heat storage; if the soil temperature is higher than 30°C, the heat stored in the shallow soil heat storage unit 600 with high heat storage passes through the third heat circulation channel 1003, the solar thermal collection unit 400 passes through the second heat circulation channel 1002 and passes through the heat exchanger 7 to heat the building 1.

[0064] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0065] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cold-heat-electric multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas, characterized by: It comprises a dual heat source heat pump unit (100) for performing heat exchange on a building (1); A photovoltaic heat exchange unit (200) is used to supply power to the building (1) and to perform heat exchange with a refrigerant of a dual heat source heat pump unit (100); A ground source water heat exchange unit (300) for performing heat exchange with the refrigerant of the dual heat source heat pump unit (100); A solar heat collection unit (400) is used to store heat converted from solar energy in a soil heat storage unit (600) and to perform heat exchange with a refrigerant in a dual heat source heat pump unit (100); A valley power heating unit (500), used for valley power heating and storing heat in a soil heat storage unit; The shallow soil heat storage unit (600) is used to store heat generated by the solar heat collection unit (600), heat generated by the valley electricity heating unit (500), exchange heat with the refrigerant of the dual heat source heat pump unit (100), and exchange heat with the ground source water heat exchange unit (300).

2. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 1 is characterized by: When the building (1) needs to be cooled in summer, the refrigerant of the dual heat source heat pump unit (100) circulates along the compressor (3) - ground source water heat exchange unit (300) - expansion valve (6) - heat exchanger (7) - compressor (3).

3. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 2 is characterized by: When the building (1) needs to be heated in winter, the refrigerant of the dual heat source heat pump unit (100) performs a double cycle, wherein the first cycle path is: photovoltaic heat exchange unit (200)-compressor (3)-heat exchanger (7)-expansion valve (6)-photovoltaic heat exchange unit (200), and the second cycle path is: ground source water heat exchange unit (300)-compressor (3)-heat exchanger (7)-expansion valve (6)-photovoltaic heat exchange unit (200).

4. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 3 is characterized by: The heat exchanger (7) exchanges heat with the building (1) via a main heat circulation channel (1000); the heat exchanger (7) exchanges heat with a solar heat collection unit (400) via a second heat circulation channel (1002); and the heat exchanger (7) exchanges heat with a shallow soil heat storage unit (600) via a third heat circulation channel (1003).

5. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 4 is characterized in that: The shallow soil heat storage unit (600) exchanges heat with the solar heat collection unit (400) through the first heat circulation channel (1001); and the shallow soil heat storage unit (600) exchanges heat with the valley electricity heating unit (500) through the fourth heat circulation channel (1004).

6. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 5 is characterized by: The second heat circulation channel (1002) is connected in parallel with the first heat circulation channel (1001) via a control valve group, and the third heat circulation channel (1003) and the fourth heat circulation channel (1004) are respectively connected to the shallow soil heat storage unit (600).

7. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to any one of claims 1 to 6, characterized in that: The photovoltaic heat exchange unit (200) comprises a photovoltaic curtain wall (2), and the air heated by the photovoltaic curtain wall (2) exchanges heat with the air source heat exchanger (4) of the dual heat source heat pump unit (100).

8. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 7 is characterized by: The ground source water heat exchange unit (300) exchanges heat with the ground source water heat exchanger (5) of the dual heat source heat pump unit (100) via a fifth heat circulation channel (105); the ground source water heat exchanger (5) and the air source heat exchanger (4) are connected in parallel between the compressor (3) and the expansion valve (6) of the ground source water heat exchange unit (300) via a control valve group.

9. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot-summer and cold-winter areas according to any one of claims 1 to 6 and 8, characterized in that: When the outdoor temperature is higher than 15°C, the dual-heat-source heat pump unit (100) cools the building (1), and if the water temperature of the solar thermal collection unit (400) is higher than 50°C, the solar thermal collection unit (400) stores the heat converted from solar energy in the shallow soil heat storage unit (600) through the first heat circulation channel (1001); If it is during the off-peak period, the off-peak heating unit (500) converts the excess electricity into heat and stores it in the shallow soil heat storage unit (600) through the fourth heat circulation channel (1004).

10. The cold-heat-electricity multi-energy coupling method based on green carbon buildings in hot summer and cold winter areas according to claim 9, characterized in that: When the outdoor temperature is lower than 15°C, the dual-heat-source heat pump unit (100) heats the building (1); if the water temperature of the solar thermal collection unit (400) is 30°C-50°C, the solar thermal collection unit (400) exchanges heat with the heat exchanger (7) of the dual-heat-source heat pump unit (100) through the second heat circulation channel (1002); if the water temperature of the solar thermal collection unit (400) is higher than 50°C, the solar thermal collection unit (400) stores the heat converted from solar energy in the shallow soil heat storage unit (600) through the first heat circulation channel (1001); If it is during the off-peak period, the off-peak heating unit (500) converts excess electricity into heat and stores it in the shallow soil heat storage unit (600) through the fourth heat circulation channel (1004); if the soil temperature is higher than 30°C, the heat stored in the shallow soil heat storage unit (600) is exchanged with the heat exchanger (7) through the third heat circulation channel (1003).

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