Multi-energy coupling heat pump heating and cooling system

Abstract

The utility model discloses a multi-energy coupling heat pump heating and cooling system which comprises a solar heat collecting system connected with a user side to form a heating loop, an air source heat pump system connected with the user side to form a heating and cooling loop, and a water source heat pump system connected with the user side to form a heating and cooling loop. The solar heat collecting system, the air source heat pump system and the water source heat pump system are arranged for multi-energy coupling heat supply and cold supply; one part of heat energy generated by the solar heat collection system is transmitted to the user side, and the other part is stored in the seasonal heat storage water tank; part of heat energy and cold energy generated by the air source heat pump system are transmitted to a user side, part of the heat energy and the cold energy are stored in the seasonal heat storage water tank, and energy consumption is reduced by arranging the seasonal heat storage water tank to store the heat energy and the cold energy; the input end of the water source heat pump system is connected with a seasonal heat storage water tank, the water source heat pump system transmits heat energy and cold energy in the seasonal heat storage water tank to a user side, the solar heat collection system is communicated with the air source heat pump system through a first defrosting pipeline, and the seasonal heat storage water tank is communicated with the air source heat pump system through a second defrosting pipeline. By arranging the first defrosting pipeline and the second defrosting pipeline, the problem that heat cannot be supplied when the air source heat pump frosts is solved; heating and cooling can be flexibly adjusted according to actual requirements of users by setting multiple working modes, and a more comfortable living environment is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and cooling systems, in particular to a multi-energy coupling heat pump heating and cooling system. Background Art

[0002] As the world's requirements for energy efficiency and environmental protection continue to increase, clean energy and efficient heating have become a research hotspot. As a technology for efficiently utilizing environmental thermal energy, solar air source heat pumps and the combination of the two provide a new approach to energy conservation and emission reduction for heating systems. However, the coupled system of solar energy and air source heat pumps is still subject to environmental restrictions and has a limited scope of application. The existing technical solutions have complex system structures and require large investments. This patented technology aims to propose a multi-energy coupled heating and cooling system that integrates solar energy, air source heat pumps and seasonal water storage tanks. The system can flexibly adjust the operating mode according to outdoor environmental conditions and real-time load requirements on the user side, thereby maximizing energy utilization and achieving economical and efficient system operation.

[0003] For example, the Chinese patent publication number CN201820500386 proposes a phase change heat storage multi-energy coupling intelligent heating and cooling system, which includes an air source heat pump, a water source heat pump, a solar thermal collector, a valley electric heater, a phase change energy storage device and a heat and cold terminal; the phase change energy storage device includes a heat storage tank and a cold storage tank; the access end and the output end of the air source heat pump, the water source heat pump, the solar thermal collector and the valley electric heater are simultaneously connected to the access port and the outlet port of the cold storage tank and the heat storage tank, so that the air source heat pump, the water source heat pump, the solar thermal collector and the valley electric heater simultaneously supply heat and cold to the heat storage tank and the cold storage tank, and the heat storage tank and the cold storage tank store the heat and cold and form a circulation pipeline.

[0004] The multi-energy coupling intelligent heating and cooling system described in the above patent has complementary advantages and disadvantages, stable heating and cooling effects, and is widely used. However, this application cannot solve the problems in the prior art that the multi-energy coupling heating and cooling system has a single working mode, is restricted by environmental conditions, and has a limited scope of application. Utility Model Content

[0005] In response to the deficiencies in the above-mentioned background technology, the present invention proposes a multi-energy coupling heat pump heating and cooling system, which solves the problems in the prior art that the multi-energy coupling system has a single working mode, is still restricted by environmental conditions and has a limited scope of application.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A multi-energy coupling heat pump heating and cooling system includes a solar thermal collection system connected to the user end to form a heating circuit, an air source heat pump system and a water source heat pump system connected to the user end to form a heating and cooling circuit. By setting up the solar thermal collection system, the air source heat pump system and the water source heat pump system to perform multi-energy coupling heating and cooling, it is possible to achieve complementary advantages and collaborative work; part of the heat energy generated by the solar thermal collection system is transferred to the user end, and part is stored in the seasonal heat storage tank; part of the heat and cold energy generated by the air source heat pump system is transferred to the user end, and part is stored in the seasonal heat storage tank The water tank is provided with a seasonal water storage tank to store heat energy and cold energy when solar energy is sufficient and the air source heat pump efficiency is high, thereby reducing energy consumption; the input end of the water source heat pump system is connected to the seasonal water storage tank, and the water source heat pump system transfers the heat energy and cold energy in the seasonal water storage tank to the user end. The solar thermal collection system is connected to the air source heat pump system through a first defrost pipeline, and the seasonal water storage tank is connected to the air source heat pump system through a second defrost pipeline. By providing the first defrost pipeline and the second defrost pipeline, the problem that the air source heat pump cannot continuously supply heat when frosted is solved, thereby improving work efficiency.

[0008] Furthermore, the solar thermal collection system includes a solar collector, and a first liquid inlet pipeline and a first liquid return pipeline are connected between the solar collector and the user end, a valve 11 and a valve 21 are provided on the first liquid inlet pipeline, the first liquid inlet pipeline is connected to the seasonal hot water storage tank through the first heat storage and cold storage liquid inlet branch, a valve 12 is provided on the first heat storage and cold storage liquid inlet branch, and excess heat energy in the solar collector is stored in the seasonal hot water storage tank through the first heat storage and cold storage liquid inlet branch, thereby reducing energy consumption; a valve 10 and a valve 24 are provided on the first return liquid pipeline, the first return liquid pipeline is connected to the seasonal hot water storage tank through the first heat storage and cold storage liquid return branch, a valve 9 is provided on the first heat storage and cold storage liquid return branch, a circulating water pump 1 is provided on the first return liquid pipeline between the seasonal hot water storage tank and the solar collector, and a circulating water pump 5 is provided on the first return liquid pipeline between the seasonal hot water storage tank and the user end, so that the medium after heat storage and heat supply can return to the solar collector for recycling.

[0009] Furthermore, the air source heat pump system includes an air-side heat exchanger, a first compressor and a user-side heat exchanger, a second liquid inlet pipeline and a second liquid return pipeline are connected between the air-side heat exchanger and the user-side heat exchanger, a first four-way valve is provided on the second liquid inlet pipeline, and the first four-way valve can control the flow direction of the medium between the air-side heat exchanger and the user-side heat exchanger, thereby controlling the heating and cooling of the air source heat pump system and improving working efficiency; the first four-way valve is connected to the first compressor through the first compression liquid inlet pipeline and the first compression liquid return pipeline, and a first throttle valve is provided on the second liquid return pipeline, the first compressor converts the medium into high pressure, and the first throttle valve converts the medium into low pressure, which facilitates the medium to release and absorb heat and improves working efficiency; a third liquid inlet pipeline and a third liquid return pipeline are connected between the user-side heat exchanger and the user end, Valve five and valve twenty are provided on the third liquid inlet pipeline, and the third liquid inlet pipeline is connected with the seasonal hot water storage tank through the second heat storage and cold storage liquid inlet branch. Valve six is provided on the second heat storage and cold storage liquid inlet branch. The excess heat energy and cold energy in the user-side heat exchanger are stored in the hot water storage tank through the second heat storage and cold storage liquid inlet branch, thereby reducing energy consumption and improving economic benefits; valve seven and valve twenty-three are provided on the third return liquid pipeline, and the third return liquid pipeline is connected with the seasonal hot water storage tank through the second heat storage and cold storage return liquid branch. Valve eight is provided on the second heat storage and cold storage return liquid branch; a circulating water pump three is provided on the third return liquid pipeline between the seasonal hot water storage tank and the user-side heat exchanger, and a circulating water pump six is provided on the third return liquid pipeline between the seasonal hot water storage tank and the user end, thereby facilitating the medium to return to the user-side heat exchanger and improving work efficiency.

[0010] Furthermore, the first defrost pipeline includes a first defrost liquid inlet pipeline and a first defrost liquid return pipeline. The first liquid inlet pipeline is connected to the air-side heat exchanger through the first defrost liquid inlet pipeline, and a valve one is provided on the first defrost liquid inlet pipeline; the first liquid return pipeline is connected to the air-side heat exchanger through the first defrost liquid return pipeline, and a valve four is provided on the first defrost liquid return pipeline. By setting the first defrost liquid inlet pipeline and the first defrost liquid return pipeline, the hot water in the solar collector is circulated between the solar collector and the air-side heat exchanger, which facilitates the defrosting of the air-side heat exchanger, prevents the air-side heat exchanger from freezing, and improves work efficiency.

[0011] Furthermore, the water source heat pump system includes a water source side heat exchanger, a second compressor and a user side water source heat exchanger, a fourth liquid inlet pipeline and a fourth liquid return pipeline are connected between the water source side heat exchanger and the seasonal water storage tank, a valve 17 is provided on the fourth liquid inlet pipeline, a valve 18 is provided on the fourth liquid return pipeline, a circulating water pump 4 is provided on the fourth liquid return pipeline between the seasonal water storage tank and the water source side heat exchanger, and the seasonal water storage tank provides heat source and cold source for the water source side heat exchanger through the fourth liquid inlet pipeline and the fourth liquid return pipeline; a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the water source side heat exchanger and the user side water source heat exchanger, and a second liquid inlet pipeline is provided on the fifth liquid return pipeline. The four-way valve controls the flow direction of the medium between the water source side heat exchanger and the user side water source heat exchanger by setting a second four-way valve; the second four-way valve is connected to the second compressor through the second compression inlet pipeline and the second compression return pipeline, and the fifth return pipeline is provided with a second throttle valve. The second compressor and the second throttle valve control the pressure of the medium to facilitate heat release and heat absorption and improve work efficiency; the user side water source heat exchanger and the user end are connected with a sixth inlet pipeline and a sixth return pipeline, the sixth inlet pipeline is provided with a valve twenty-five, the sixth return pipeline is provided with a valve twenty-six, and the sixth return pipeline between the user side water source heat exchanger and the user end is provided with a circulating water pump eight.

[0012] Furthermore, a seventh liquid inlet pipeline and a seventh liquid return pipeline are connected between the seasonal water storage tank and the user end. The seventh liquid inlet pipeline is provided with a valve 14 and a valve 19, and the seventh liquid return pipeline is provided with a valve 16 and a valve 22. A circulating water pump 7 is provided on the seventh liquid return pipeline between the seasonal water storage tank and the user end. The seasonal water storage tank directly provides the stored heat energy and cold energy to the user end, thereby improving resource utilization.

[0013] Furthermore, the second defrost pipeline includes a second defrost inlet pipeline and a second defrost return pipeline connected between the seasonal hot water storage tank and the air-side heat exchanger. Valve 2 and valve 13 are provided on the second defrost inlet pipeline, valve 3 and valve 15 are provided on the second defrost return pipeline, and circulating water pump 2 is provided on the second defrost return pipeline between the seasonal hot water storage tank and the air-side heat exchanger. By setting the second defrost inlet pipeline and the second defrost return pipeline, the heat energy in the seasonal hot water storage tank enters the air-side heat exchanger for defrosting and recycling, thereby ensuring stable operation of the system and improving work efficiency.

[0014] Furthermore, the seasonal hot water storage tank is provided with an exhaust device and a water replenishing device. The exhaust device stabilizes the water pressure in the hot water storage tank and improves the stability of the hot water storage tank; the water replenishing device replenishes water for the hot water storage tank, continuously replenishes water, and improves work efficiency.

[0015] Furthermore, the exhaust device is an exhaust valve, which has a simple structure and is convenient for stabilizing the pressure; the water replenishment device is a water replenishment valve, which is connected to a tap water pipe to quickly and conveniently replenish water for the hot water storage tank.

[0016] The beneficial effects of the utility model are:

[0017] The present utility model proposes a multi-energy coupling heat pump heating and cooling system. By setting up a solar energy collection system, an air source heat pump system and a water source heat pump system for multi-energy coupling heating and cooling, it can achieve complementary advantages and coordinated work between different energy sources. By setting up a seasonal heat storage tank, it is used to store heat and cold energy when there is sufficient solar energy or the air source heat pump has high efficiency, so as to cope with the demand for heat and cold energy at night, rainy days or when the user load is at peak; by setting up a first defrost pipeline and a second defrost pipeline, the problem that the air source heat pump cannot continuously provide heat when frosted is solved; by setting up multiple working modes and combining peak and valley electricity price policies, the system operation strategy is optimized, the operation cost is reduced, and the economic benefits are improved. The heating and cooling capacity can be flexibly adjusted according to the actual needs of the user to provide a more comfortable living environment. The present utility model has a high degree of adaptability and flexibility, and can cope with various complex and changeable weather conditions and user load requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is the overall working principle diagram of the multi-energy coupling heat pump heating and cooling system of the utility model;

[0020] Figure 2 This is a working principle diagram of the solar thermal collection system of the utility model;

[0021] Figure 3 This is a working principle diagram of the air source heat pump system of the utility model;

[0022] Figure 4 This is a working principle diagram of the water source heat pump system of the utility model;

[0023] Figure 5 This is a working principle diagram of the seasonal hot water storage tank of the present utility model;

[0024] Figure 6 This is a schematic diagram of the first defrost pipeline of the present invention;

[0025] Figure 7 This is a schematic diagram of the second defrost pipeline of the present invention;

[0026] 1. Solar collector; 2. Air-source heat pump system; 21. Air-side heat exchanger; 22. First compressor; 23. User-side heat exchanger; 24. First throttle valve; 25. First four-way valve; 3. Seasonal hot water storage tank; 4. Water-source heat pump system; 41. Water-source heat exchanger; 42. Second compressor; 43. User-side water-source heat exchanger; 44. Second throttle valve; 45. Second four-way valve; 5. Circulating water pump; 51. Circulating water pump 1; 52. Circulating water pump 2; 53. Circulating water pump 3; 54. Circulating water pump 4; 55. Circulating water pump 5; 56. Circulating water pump 6; 57. Circulating water pump 7; 6. Valves; 601. Valve 1; 602. Valve 2; 603, valve three; 604, valve four; 605, valve five; 606, valve six; 607, valve seven; 608, valve eight; 609, valve nine; 610, valve ten; 611, valve eleven; 612, valve twelve; 613, valve thirteen; 614, valve fourteen; 615, valve fifteen; 616, valve sixteen; 617, valve seventeen; 618, valve eighteen; 619, valve nineteen; 620, valve twenty; 621, valve twenty-one; 622, valve twenty-two; 623, valve twenty-three; 624, valve twenty-four; 625, valve twenty-five; 626, valve twenty-six; 7, user end. DETAILED DESCRIPTION

[0027] 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 embodiments described 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 are within the scope of protection of the present invention.

[0028] Example 1, as Figure 1As shown, in this embodiment, a multi-energy coupled heat pump heating and cooling system includes a solar thermal collection system connected to the user end 7 to form a heating circuit, an air source heat pump system 2 and a water source heat pump system 4 connected to the user end 7 to form a heating and cooling circuit, the solar thermal collection system, the air source heat pump system 2 and the water source heat pump system 4 are used to supply heat to the user end 7, and the air source heat pump system 2 and the water source heat pump system 4 are used to supply cooling to the user end 7. The utility model adopts a multi-energy coupled heating and cooling system to achieve complementary advantages and coordinated work between different energy sources; part of the heat energy generated by the solar thermal collection system is transferred to the user end 7, and part is stored in the seasonal water storage tank 3, and the excess heat energy after the solar thermal collector supplies heat to the user end 7 is stored in the seasonal water storage tank 3; the heat energy and cooling energy generated by the air source heat pump system 2 are Part of it is transferred to the user end 7, and part of it is stored in the seasonal water storage tank 3. The excess heat energy and cold energy after the air source heat pump system 2 provides heating and cooling to the user end 7 can be stored in the seasonal water storage tank 3; the input end of the water source heat pump system 4 is connected to the seasonal water storage tank 3, and the seasonal water storage tank 3 serves as the input source of the water source heat pump system 4; the water source heat pump system 4 transfers the heat energy and cold energy in the seasonal water storage tank 3 to the user end 7, the solar thermal collection system is connected to the air source heat pump system 2 through the first defrost pipeline, and the seasonal water storage tank 3 is connected to the air source heat pump system 2 through the second defrost pipeline; in winter, the solar thermal collection system defrosts the air source heat pump system 2 through the first defrost pipeline, and the seasonal water storage tank 3 defrosts the air source heat pump system 2 through the second defrost pipeline to prevent the air source heat pump system 2 from freezing and stopping working.

[0029] On the basis of the above embodiment, as a preferred embodiment, Figure 2As shown, the solar thermal collection system includes a solar thermal collector 1. Preferably, the medium in the solar thermal collector 1 is a water medium. A first liquid inlet pipeline and a first liquid return pipeline are connected between the solar thermal collector 1 and the user end 7. A valve 11 611 and a valve 21 621 are provided on the first liquid inlet pipeline. After the solar thermal collector 1 heats the water medium, the water medium enters the user end 7 through the first liquid inlet pipeline in the form of hot water for heating; the first liquid inlet pipeline is connected to the seasonal hot water storage tank 3 through the first heat storage and cold storage liquid inlet branch. A valve 12 612 is provided on the first heat storage and cold storage liquid inlet branch. The excess heat energy in the solar thermal collector 1 enters the seasonal hot water storage tank 3 through the first heat storage and cold storage liquid inlet branch for storage. The hot water enters the seasonal hot water storage tank 3 and exchanges heat with the medium in the seasonal hot water storage tank 3 to store heat. Energy; Valve ten 610 and valve twenty-four 624 are provided on the first return liquid pipeline, the first return liquid pipeline is connected with the seasonal hot water storage tank 3 through the first heat storage and cold storage return liquid branch, valve nine 609 is provided on the first heat storage and cold storage return liquid branch, a circulating water pump one 51 is provided on the first return liquid pipeline between the seasonal hot water storage tank 3 and the solar collector 1, after the hot water exchanges heat in the seasonal hot water storage tank 3, the water medium enters the first return liquid pipeline through the first heat storage and cold storage return liquid branch, and returns to the solar collector 1 under the action of the circulating water pump one 51; a circulating water pump five 55 is provided on the first return liquid pipeline between the seasonal hot water storage tank 3 and the user end 7, after the water medium provides heat to the user end 7, it returns to the solar collector 1 through the first return liquid pipeline under the action of the circulating water pump one 51 and the circulating water pump five 55 to collect heat again.

[0030] On the basis of the above embodiment, as a preferred embodiment, Figure 3As shown, the air source heat pump system includes an air side heat exchanger 21, a first compressor 22 and a user side heat exchanger 23. Preferably, the medium in the air side heat exchanger 21 is a refrigerant, and the medium in the user side heat exchanger 23 is a water medium. A second liquid inlet pipeline and a second liquid return pipeline are connected between the air side heat exchanger 21 and the user side heat exchanger 23. A first four-way valve 25 is provided on the second liquid inlet pipeline. The first four-way valve 25 is connected to the first compressor 22 through the first compression liquid inlet pipeline and the first compression liquid return pipeline. A first throttle valve 24 is provided on the second liquid return pipeline. The refrigerant in the air side heat exchanger 21 and the room After external heat exchange, the refrigerant enters the second liquid inlet pipeline, and under the action of the first four-way valve 25, it flows through the first compressor 22 through the first compression liquid inlet pipeline and the first compression return liquid pipeline. The first compressor 22 converts the refrigerant into high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the user-side heat exchanger 23 from the first four-way valve 25 for heat exchange. After heat exchange, the refrigerant flows through the second return liquid pipeline and the first throttle valve 24. Under the action of the first throttle valve 24, the refrigerant returns to the air-side heat exchanger in the form of low temperature and low pressure; a third liquid inlet pipeline and a third return liquid pipeline are connected between the user-side heat exchanger 23 and the user end 7. A valve is provided on the third liquid inlet pipeline. The fifth valve 605 and the twenty valve 620, the third liquid inlet pipeline is connected to the seasonal hot water storage tank 3 through the second thermal storage and cold storage liquid inlet branch, the second thermal storage and cold storage liquid inlet branch is provided with a valve six 606, the excess heat energy in the user-side heat exchanger 23 is stored in the seasonal hot water storage tank 3 through the second thermal storage and cold storage liquid inlet branch, the water medium in the user-side heat exchanger 23 exchanges heat with the medium in the seasonal hot water storage tank 3 to store heat energy; the third liquid return pipeline is provided with a valve seven 607 and a valve twenty-three 623, the third liquid return pipeline is connected to the seasonal hot water storage tank 3 through the second thermal storage and cold storage liquid return branch, the second thermal storage and cold storage liquid return branch is provided with a valve six 606, the excess heat energy in the user-side heat exchanger 23 is stored in the seasonal hot water storage tank 3 through the second thermal storage and cold storage liquid return branch A valve eight 608 is provided on the branch line; a circulating water pump three 53 is provided on the third return liquid pipeline between the seasonal hot water storage tank 3 and the user-side heat exchanger 23. After the water medium stores heat energy in the seasonal hot water storage tank 3, it enters the third return liquid pipeline through the second heat storage and cold storage return liquid branch. Under the action of the circulating water pump three 53, the water medium returns to the user-side heat exchanger 23; a circulating water pump six 56 is provided on the third return liquid pipeline between the seasonal hot water storage tank 3 and the user end 7. Under the action of the circulating water pump three 53 and the circulating water pump six 56, the water medium returns to the user-side heat exchanger 23 through the third return liquid pipeline after providing heat at the user end 7.

[0031] On the basis of the above embodiment, as a preferred embodiment, Figure 4As shown, the water source heat pump system 4 includes a water source side heat exchanger 41, a second compressor 42 and a user side water source heat exchanger 43. Preferably, the medium in the water source side heat exchanger 41 is a refrigerant, and the medium in the user side water source heat exchanger 43 is a water medium; a fourth liquid inlet pipeline and a fourth liquid return pipeline are connected between the water source side heat exchanger 41 and the seasonal hot water storage tank 3, a valve 17 617 is provided on the fourth liquid inlet pipeline, a valve 18 618 is provided on the fourth liquid return pipeline, and a valve 19 620 is provided on the fourth liquid return pipeline between the seasonal hot water storage tank 3 and the water source side heat exchanger 41. There is a circulating water pump 454, and the medium in the seasonal hot water storage tank 3 enters the water source heat exchanger 41 through the fourth liquid inlet pipeline for heat exchange to provide a heat source. Under the action of the circulating water pump 454, the medium returns to the seasonal hot water storage tank 3 through the fourth return liquid pipeline; a fifth liquid inlet pipeline and a fifth return liquid pipeline are connected between the water source side heat exchanger 41 and the user side water source heat exchanger 43. A second four-way valve 45 is provided on the fifth liquid inlet pipeline. The second four-way valve 45 is connected to the second compressor 42 through the second compression liquid inlet pipeline and the second compression return liquid pipeline. There is a second throttle valve 44. The refrigerant in the water source side heat exchanger 41 enters the fifth liquid inlet pipeline after heat exchange. Under the action of the second four-way valve 45, it flows through the second compression liquid inlet pipeline and the second compression return liquid pipeline through the second compressor 44. The second compressor 42 converts the refrigerant into high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the user side water source heat exchanger 43 from the second four-way valve 45. After heat exchange, the refrigerant flows through the fifth return liquid pipeline through the second throttle valve 44. Under the action of the second throttle valve 44, the refrigerant returns to the water source side heat exchanger 41 in the form of low temperature and low pressure; the user side water A sixth liquid inlet pipeline and a sixth liquid return pipeline are connected between the source heat exchanger 43 and the user end 7. A valve twenty-five 625 is provided on the sixth liquid inlet pipeline. After heat exchange, the water medium in the user-side water source heat exchanger 43 enters the user end 7 through the sixth liquid inlet pipeline for heating; a valve twenty-six 626 is provided on the sixth liquid return pipeline. A circulating water pump eight 58 is provided on the sixth liquid return pipeline between the user-side water source heat exchanger 43 and the user end 7. Under the action of the circulating water pump eight 58, the water medium that provides heat to the user end 7 returns to the user-side water source heat exchanger 43 through the sixth liquid return pipeline.

[0032] Example 2 is further optimized based on Example 1. Figure 5As shown, the seasonal water storage tank 3 can store excess heat energy in the solar thermal collection system and the air source heat pump system. Preferably, the medium in the seasonal water storage tank 3 is a water medium, and the water medium stores heat energy through heat exchange; a seventh liquid inlet pipeline and a seventh liquid return pipeline are connected between the seasonal water storage tank 3 and the user end 7, and a valve fourteen 614 and a valve nineteen 619 are provided on the seventh liquid inlet pipeline. The heat energy stored in the seasonal water storage tank 3 is directly used to provide heat to the user end 7 through the seventh liquid inlet pipeline; a valve sixteen 616 and a valve twenty-two 622 are provided on the seventh liquid return pipeline, and a circulating water pump seven 57 is provided on the seventh liquid return pipeline between the seasonal water storage tank 3 and the user end 7. Under the action of the circulating water pump seven 57, the water medium returns to the seasonal water storage tank 3 through the seventh liquid return pipeline after providing heat to the user end 7.

[0033] Example 3 is further optimized based on Example 1. Figure 6 As shown, the first defrost pipeline includes a first defrost inlet pipeline and a first defrost return pipeline. The first inlet pipeline is connected to the air-side heat exchanger 21 through the first defrost inlet pipeline. A valve 601 is provided on the first defrost inlet pipeline. The water medium in the solar collector 1 enters the air-side heat exchanger 21 in the form of hot water through the first defrost inlet pipeline for defrosting. The hot water flows in the coil of the air-side heat exchanger 21 to melt the frost on the fin surface; the first return pipeline is connected to the air-side heat exchanger 21 through the first defrost return pipeline. A valve 604 is provided on the first defrost return pipeline. After being defrosted in the air-side heat exchanger 21, the hot water enters the first return pipeline through the first defrost return pipeline and returns to the solar collector 1 under the action of the circulating water pump 51.

[0034] On the basis of the above embodiment, as a preferred embodiment, Figure 7 As shown, the second defrost pipeline includes a second defrost inlet pipeline and a second defrost return pipeline connected between the seasonal water storage tank 3 and the air-side heat exchanger 21. A valve thirteen 613 and a valve two 602 are provided on the second defrost inlet pipeline. The heat energy stored in the seasonal water storage tank 3 enters the air-side heat exchanger 21 in the form of hot water through the second defrost inlet pipeline for defrosting. The hot water flows in the coil of the air-side heat exchanger 21 to melt the frost on the fin surface; a valve three 603 and a valve fifteen 615 are provided on the second defrost return pipeline between the seasonal water storage tank 3 and the air-side heat exchanger 21. A circulating water pump two 52 is provided on the second defrost return pipeline. After being defrosted in the air-side heat exchanger 21, the hot water passes through the second defrost return pipeline and returns to the seasonal water storage tank 3 under the action of the circulating water pump two 52.

[0035] A working method of a multi-energy coupling heat pump heating and cooling system includes multiple working modes, including solar heating mode, solar heat storage mode, solar defrosting mode, air source heat pump heating mode, air source heat pump cooling mode, air source heat pump heat storage mode, air source heat pump cooling mode, seasonal hot water storage tank heating mode, seasonal hot water storage tank cooling mode, seasonal hot water storage tank defrosting mode, water source heat pump heating mode, and water source heat pump cooling mode.

[0036] In the solar heating mode, open valve 11 611 and valve 21 621, and the water medium in the solar collector 1 provides heat to the user end 7 through the first liquid inlet pipeline; open valve 24 624 and valve 10 610, and under the action of circulating water pump 5 55 and circulating water pump 1 51, the water medium returns to the solar collector 1 through the first return liquid pipeline.

[0037] In the solar thermal storage mode, open valve twelve 612, and the excess heat energy in the solar thermal collector 1 enters the seasonal hot water storage tank 3 through the first heat storage and cold storage liquid inlet branch for heat storage; open valve nine 609 and valve ten 610, and under the action of the circulating water pump one 51, the water medium returns to the solar thermal collector 1 through the first heat storage and cold storage liquid return branch.

[0038] In the solar defrost mode, open valve 1 601, and the water medium in the solar collector 1 enters the air-side heat exchanger 21 through the first defrost liquid inlet pipeline for defrosting, and the water medium flows in the coil of the air-side heat exchanger 21 to melt the frost on the fin surface; open valve 4 604, and under the action of the circulating water pump 1 51, the water medium returns to the solar collector 1 through the first defrost liquid return pipeline.

[0039] In the air source heat pump heating mode, the refrigerant in the air side heat exchanger 21 exchanges heat with the outdoor air and enters the second liquid inlet pipeline. Under the action of the first four-way valve 25, it flows through the first compression liquid inlet pipeline and the first compression return liquid pipeline through the first compressor 22. The first compressor 22 converts the refrigerant into high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the user side heat exchanger 23 from the first four-way valve 25 to release heat, and flows through the first throttle valve 24 through the second return liquid pipeline. Under the action of the first throttle valve 24, the refrigerant returns to the air side heat exchanger 21 in the form of low temperature and low pressure; open valve five 605 and valve twenty 620, and the water medium in the user side heat exchanger 23 enters the user end 7 through the third liquid inlet pipeline for heating after heat exchange. Open valve seven 607 and valve twenty-three 623, and under the action of circulating water pump three 53 and circulating water pump six 56, the water medium returns to the user side heat exchanger 23 through the third return liquid pipeline.

[0040] In the cooling mode of the air source heat pump, under the action of the first four-way valve 25, a reverse cycle is realized between the air side heat exchanger 21 and the user side heat exchanger 23. The refrigerant absorbs heat in the user side heat exchanger 23 and enters the second liquid inlet pipeline. Under the action of the first four-way valve 25, it flows through the first compressor 22 through the first compression liquid inlet pipeline and the first compression liquid return pipeline. The first compressor 22 converts the refrigerant into high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the air side heat exchanger 21 from the first four-way valve 25. The refrigerant is Heat is released outdoors and flows through the first throttle valve 24 through the second return liquid pipeline. Under the action of the first throttle valve 24, the refrigerant is returned to the user-side heat exchanger 23 in the form of low temperature and low pressure; open valve five 605 and valve twenty 620, and the water medium in the user-side heat exchanger 23 enters the user end 7 through the third liquid inlet pipeline for cooling after being cooled. Open valve seven 607 and valve twenty-three 623, and under the action of circulating water pump six 56, the water medium returns to the user-side heat exchanger 23 through the third return liquid pipeline.

[0041] When the air source heat pump is in heat storage mode or cold storage mode, open valve six 606, and the excess heat energy or cold energy in the user-side heat exchanger 23 enters the seasonal hot water storage tank 3 through the second heat storage and cold storage liquid inlet branch for storage; open valve eight 608, and under the action of the circulating water pump three 53, the water medium returns to the user-side heat exchanger 23 through the second heat storage and cold storage liquid return branch.

[0042] When the seasonal water storage tank is in heating / cooling mode, open valve fourteen 614 and valve nineteen 619, and the heat energy and cold energy stored in the seasonal water storage tank 3 enter the user end 7 through the seventh liquid inlet pipeline; open valve twenty-two 622 and valve sixteen 616, and under the action of circulating water pump seven 57, the water medium returns to the seasonal water storage tank 3 through the seventh liquid return pipeline.

[0043] When the seasonal hot water storage tank is in defrost mode, valve two 602 and valve thirteen 613 are opened, and the water medium in the seasonal hot water storage tank 3 enters the air-side heat exchanger 21 through the second defrost liquid inlet pipeline for defrosting, and the water medium flows in the coil of the air-side heat exchanger 21 to melt the frost on the fin surface; open valve three 603 and valve fifteen 615, and under the action of circulating water pump two 52, the water medium returns to the seasonal hot water storage tank 3 through the second defrost return liquid pipeline.

[0044] In the water source heat pump heating mode, valve 17 617 is opened, and the heat energy in the seasonal hot water storage tank 3 enters the water source side heat exchanger 41 through the fourth liquid inlet pipeline. Valve 18 618 is opened, and under the action of the circulating water pump 4 54, the water medium returns to the seasonal hot water storage tank 3 through the fourth return liquid pipeline; the refrigerant in the water source side heat exchanger 41 enters the fifth liquid inlet pipeline after heat exchange, and under the action of the second four-way valve 45, flows through the second compression liquid inlet pipeline and the second compression return liquid pipeline and flows through the second compressor 42. The second compressor 42 converts the refrigerant into high temperature and high pressure The refrigerant, the high-temperature and high-pressure refrigerant enters the user-side water source heat exchanger 43 from the second four-way valve 45, and flows through the second throttle valve 44 through the fifth return liquid pipeline. Under the action of the second throttle valve 44, the refrigerant returns to the water source side heat exchanger 41 in the form of low temperature and low pressure; open valve twenty-five 625, and the water medium in the user-side water source heat exchanger 43 enters the user end 7 for heating through the sixth liquid inlet pipeline after heat exchange. Open valve twenty-six 626, and under the action of the circulating water pump eight 58, the medium returns to the user-side water source heat exchanger 43 through the sixth return liquid pipeline.

[0045] When the water source heat pump is in cooling mode, valve seventeen 617 is opened, and the water medium in the seasonal hot water storage tank 3 enters the water source side heat exchanger 41 through the fourth liquid inlet pipeline for heat exchange, and valve eighteen 618 is opened. Under the action of the circulating water pump four 54, the water medium returns to the seasonal hot water storage tank 3 through the fourth return liquid pipeline; under the action of the second four-way valve 45, a reverse circulation is realized between the water source side heat exchanger 41 and the user side water source heat exchanger 43, and the refrigerant absorbs heat in the user side water source heat exchanger 43 and enters the fifth liquid inlet pipeline. Under the action of the second four-way valve 45, it flows through the second compressed liquid inlet pipeline and the second compressed liquid return pipeline through the second Compressor 42, the second compressor 42 converts the refrigerant into high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the water source side heat exchanger 41 from the second four-way valve 45 to release heat, and flows through the second throttle valve 44 through the fifth return liquid pipeline. Under the action of the second throttle valve 44, the refrigerant returns to the user side water source heat exchanger 43 in the form of low temperature and low pressure; open valve twenty-five 625, the water medium in the user side water source heat exchanger 43 enters the user end 7 through the sixth liquid inlet pipeline for cooling after cooling, open valve twenty-six 626, and under the action of the circulating water pump eight 58, the water medium returns to the user side water source heat exchanger 43 through the sixth return liquid pipeline.

[0046] The method of using the utility model is as follows:

[0047] According to outdoor environmental conditions and load requirements, different operating modes are switched by adjusting valves and pump flows.

[0048] 1. During the heating season, when the solar radiation intensity is high during the day and the user-side load demand matches, the solar heating mode is operated.

[0049] 2. During the heating season, when the solar radiation intensity is high during the day and the user-side load demand is low, the solar heating mode + solar heat storage mode is operated.

[0050] 3. During the heating season, when the outdoor air temperature is high and the user-side load demand is high, the air source heat pump heating mode is operated.

[0051] 4. During the heating season, when the outdoor air temperature is high and the user-side load demand is low, operate the air source heat pump heating mode + air source heat pump heat storage mode.

[0052] 5. During the heating season, when the solar radiation intensity is low during the day, the outdoor air temperature is high, and the user-side load demand is high, the solar heating mode + air source heat pump heating mode is operated.

[0053] 6. During the heating season, when the solar radiation intensity is low during the day, the outdoor air temperature is low, and the user-side load demand is high, the solar heating mode + air source heat pump heating mode + seasonal hot water storage tank heating mode will be operated.

[0054] 7. During the heating season, the solar system stops operating at night or on rainy days. That is, solar heating mode 1 and solar heat storage mode stop operating. When the outdoor air temperature is high, the operation mode is the same as working methods 3 and 4.

[0055] 8. During the heating season, at night or on rainy days, when the outdoor air temperature is low and the user-side load demand is high, operate the air source heat pump heating mode + seasonal water storage tank heating mode.

[0056] 9. During the heating season, at night or on rainy days, when the outdoor air temperature is extremely low, operate the seasonal hot water storage tank heating mode.

[0057] 10. During the heating season, at night or on rainy days, when the outdoor air temperature is extremely low and the user-side load demand is high, the seasonal hot water storage tank heating mode + water source heat pump heating mode will be operated.

[0058] 11. During the heating season, driving the heat pump according to the peak and valley electricity prices and adjusting the circulating water pump flow of the electric-driven heat pump can improve the overall economy and heating performance of the system. When the electricity price is low, the air source heat pump heating mode, air source heat pump heat storage mode, and water source heat pump heating mode are operated. However, when the outdoor air temperature is extremely low, the air source heat pump heating mode and air source heat pump heat storage mode are stopped.

[0059] 12. During the heating season, if the outdoor air temperature drops significantly (for a prolonged period), the air source heat pump system will stop operating. If the outdoor air temperature fluctuates throughout the day and the air source heat pump requires defrosting, the system will operate in solar defrost mode or seasonal hot water tank defrost mode. At night or on rainy days, the seasonal hot water tank defrost mode will be used.

[0060] 13. In summer, the outdoor air temperature is suitable, and the air source heat pump cooling mode is operated to meet the user's cooling load demand.

[0061] 14. In summer, the outdoor air temperature is suitable and the user's cooling load demand is high. The air source heat pump cooling mode + seasonal hot water storage tank cooling mode is operated.

[0062] 15. In summer, the outdoor air temperature is suitable and the user's cooling load demand is extremely high. The air source heat pump cooling mode + seasonal hot water storage tank cooling mode + water source heat pump cooling mode are operated.

[0063] 16. In summer, the outdoor air temperature is too high, and the seasonal hot water storage tank cooling mode is operated to meet the user's cooling load demand.

[0064] 17. In summer, the outdoor air temperature is too high and the user's cooling load demand is high, so the seasonal hot water storage tank cooling mode + water source heat pump cooling mode is operated.

[0065] 18. In summer, the outdoor temperature is suitable and the user's cooling load demand is low, so the air source heat pump cold storage mode + air source heat pump cooling mode is operated.

[0066] 19. In summer, driving the heat pump according to the peak and valley electricity prices and adjusting the circulating water pump flow of the electric-driven heat pump can improve the overall economy and cooling performance of the system. When the electricity price is low, the air source heat pump heating mode, air source heat pump cold storage mode, and water source heat pump cooling mode are operated. However, when the outdoor air temperature is extremely high, the efficiency of the air source heat pump system is too low. At this time, the air source heat pump cooling mode and air source heat pump cold storage mode stop running.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-energy coupled heat pump heating and cooling system, characterized by: The invention comprises a solar heat collection system connected to a user end (7) to form a heating circuit, an air source heat pump system (2) and a water source heat pump system (4) connected to the user end (7) to form a heating and cooling circuit, wherein a portion of the heat energy generated by the solar heat collection system is transferred to the user end (7), and a portion is stored in a seasonal heat storage tank (3); a portion of the heat energy and cold energy generated by the air source heat pump system (2) is transferred to the user end (7), and a portion is stored in the seasonal heat storage tank (3); an input end of the water source heat pump system (4) is connected to the seasonal heat storage tank (3), and the water source heat pump system (4) transfers the heat energy and cold energy in the seasonal heat storage tank (3) to the user end (7); the solar heat collection system and the air source heat pump system (2) are connected through a first defrosting pipeline, and the seasonal heat storage tank (3) and the air source heat pump system (2) are connected through a second defrosting pipeline.

2. The multi-energy coupled heat pump heating and cooling system according to claim 1, characterized in that: The solar thermal collection system comprises a solar thermal collector (1), a first liquid inlet pipeline and a first liquid return pipeline are connected between the solar thermal collector (1) and the user end (7), a valve eleven (611) and a valve twenty-one (621) are provided on the first liquid inlet pipeline, the first liquid inlet pipeline is connected to the seasonal hot water storage tank (3) through a first heat storage and cold storage liquid inlet branch, the first heat storage and cold storage liquid inlet branch is provided with a valve twelve (612); a valve ten (610) and a valve twenty-four (624) are provided on the first liquid return pipeline, the first liquid return pipeline is connected to the seasonal hot water storage tank (3) through the first heat storage and cold storage liquid return branch, the first heat storage and cold storage liquid return branch is provided with a valve nine (609), a circulating water pump one (51) is provided on the first liquid return pipeline between the seasonal hot water storage tank (3) and the solar thermal collector (1), and a circulating water pump five (55) is provided on the first liquid return pipeline between the seasonal hot water storage tank (3) and the user end (7).

3. The multi-energy coupled heat pump heating and cooling system according to claim 1 or 2, characterized in that: The air source heat pump system comprises an air side heat exchanger (21), a first compressor (22) and a user side heat exchanger (23); a second liquid inlet pipeline and a second liquid return pipeline are connected between the air side heat exchanger (21) and the user side heat exchanger (23); a first four-way valve (25) is provided on the second liquid inlet pipeline; the first four-way valve (25) is connected to the first compressor (22) via a first compression liquid inlet pipeline and a first compression liquid return pipeline; a first throttle valve (24) is provided on the second liquid return pipeline; a third liquid inlet pipeline and a third liquid return pipeline are connected between the user side heat exchanger (23) and the user end (7); a valve five (605) and a valve twenty (606) are provided on the third liquid inlet pipeline. 20), the third liquid inlet pipeline is connected to the seasonal hot water storage tank (3) through the second heat storage and cold storage liquid inlet branch, and the second heat storage and cold storage liquid inlet branch is provided with a valve six (606); the third liquid return pipeline is provided with a valve seven (607) and a valve twenty-three (623), the third liquid return pipeline is connected to the seasonal hot water storage tank (3) through the second heat storage and cold storage liquid return branch, and the second heat storage and cold storage liquid return branch is provided with a valve eight (608); a circulating water pump three (53) is provided on the third liquid return pipeline between the seasonal hot water storage tank (3) and the user side heat exchanger (23), and a circulating water pump six (56) is provided on the third liquid return pipeline between the seasonal hot water storage tank (3) and the user end (7).

4. The multi-energy coupled heat pump heating and cooling system according to claim 1, characterized in that: The first defrost pipeline includes a first defrost liquid inlet pipeline and a first defrost liquid return pipeline, the first liquid inlet pipeline is connected to the air side heat exchanger (21) through the first defrost liquid inlet pipeline, and a valve one (601) is provided on the first defrost liquid inlet pipeline; the first liquid return pipeline is connected to the air side heat exchanger (21) through the first defrost liquid return pipeline, and a valve four (604) is provided on the first defrost liquid return pipeline.

5. The multi-energy coupled heat pump heating and cooling system according to claim 1 or 4, characterized in that: The water source heat pump system (4) includes a water source side heat exchanger (41), a second compressor (42) and a user side water source heat exchanger (43); a fourth liquid inlet pipeline and a fourth liquid return pipeline are connected between the water source side heat exchanger (41) and the seasonal hot water storage tank (3); a valve seventeen (617) is provided on the fourth liquid inlet pipeline, a valve eighteen (618) is provided on the fourth liquid return pipeline, and a circulating water pump four (54) is provided on the fourth liquid return pipeline between the seasonal hot water storage tank (3) and the water source side heat exchanger (41); a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the water source side heat exchanger (41) and the user side water source heat exchanger (43). There are five return liquid pipelines, a second four-way valve (45) is provided on the fifth liquid inlet pipeline, the second four-way valve (45) is connected to the second compressor (42) through the second compression liquid inlet pipeline and the second compression liquid return pipeline, and a second throttle valve (44) is provided on the fifth liquid return pipeline; a sixth liquid inlet pipeline and a sixth liquid return pipeline are connected between the user-side water source heat exchanger (43) and the user end (7), a valve twenty-five (625) is provided on the sixth liquid inlet pipeline, a valve twenty-six (626) is provided on the sixth liquid return pipeline, and a circulating water pump eight (58) is provided on the sixth liquid return pipeline between the user-side water source heat exchanger (43) and the user end (7).

6. The multi-energy coupled heat pump heating and cooling system according to claim 1, characterized in that: A seventh liquid inlet pipeline and a seventh liquid return pipeline are connected between the seasonal hot water storage tank (3) and the user end (7); a valve fourteen (614) and a valve nineteen (619) are provided on the seventh liquid inlet pipeline; a valve sixteen (616) and a valve twenty-two (622) are provided on the seventh liquid return pipeline; and a circulating water pump seven (57) is provided on the seventh liquid return pipeline between the seasonal hot water storage tank (3) and the user end (7).

7. The multi-energy coupled heat pump heating and cooling system according to claim 1 or 6, characterized in that: The second defrost pipeline includes a second defrost liquid inlet pipeline and a second defrost liquid return pipeline connected between the seasonal hot water storage tank (3) and the air-side heat exchanger (21), the second defrost liquid inlet pipeline is provided with a valve 2 (602) and a valve 13 (613), the second defrost liquid return pipeline is provided with a valve 3 (603) and a valve 15 (615), and the second defrost liquid return pipeline between the seasonal hot water storage tank (3) and the air-side heat exchanger (21) is provided with a circulating water pump 2 (52).

8. The multi-energy coupled heat pump heating and cooling system according to claim 7, characterized in that: The seasonal hot water storage tank (3) is provided with an exhaust device and a water replenishing device.

9. The multi-energy coupled heat pump heating and cooling system according to claim 8, characterized in that: The exhaust device is an exhaust valve, and the water supply device is a water supply valve, which is connected to a tap water pipe.

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